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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 | ||
16 | #include <linux/config.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/init.h> | |
19 | ||
20 | #include <linux/time.h> | |
21 | #include <linux/kernel.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/stat.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/unistd.h> | |
27 | #include <linux/sunrpc/clnt.h> | |
28 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 29 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
30 | #include <linux/nfs_fs.h> |
31 | #include <linux/nfs_mount.h> | |
32 | #include <linux/nfs4_mount.h> | |
33 | #include <linux/lockd/bind.h> | |
34 | #include <linux/smp_lock.h> | |
35 | #include <linux/seq_file.h> | |
36 | #include <linux/mount.h> | |
37 | #include <linux/nfs_idmap.h> | |
38 | #include <linux/vfs.h> | |
9cdb3883 MN |
39 | #include <linux/inet.h> |
40 | #include <linux/nfs_xdr.h> | |
1da177e4 LT |
41 | |
42 | #include <asm/system.h> | |
43 | #include <asm/uaccess.h> | |
44 | ||
4ce79717 | 45 | #include "nfs4_fs.h" |
a72b4422 | 46 | #include "callback.h" |
1da177e4 | 47 | #include "delegation.h" |
d9ef5a8c | 48 | #include "iostat.h" |
f7b422b1 | 49 | #include "internal.h" |
1da177e4 LT |
50 | |
51 | #define NFSDBG_FACILITY NFSDBG_VFS | |
52 | #define NFS_PARANOIA 1 | |
53 | ||
1da177e4 | 54 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 55 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 56 | |
ada70d94 | 57 | static void nfs_zap_acl_cache(struct inode *); |
1da177e4 | 58 | |
f7b422b1 | 59 | static kmem_cache_t * nfs_inode_cachep; |
b7fa0554 | 60 | |
1da177e4 LT |
61 | static inline unsigned long |
62 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
63 | { | |
64 | return nfs_fileid_to_ino_t(fattr->fileid); | |
65 | } | |
66 | ||
f7b422b1 | 67 | int nfs_write_inode(struct inode *inode, int sync) |
1da177e4 | 68 | { |
c42de9dd | 69 | int flags = sync ? FLUSH_SYNC : 0; |
1da177e4 LT |
70 | int ret; |
71 | ||
3da28eb1 | 72 | ret = nfs_commit_inode(inode, flags); |
1da177e4 LT |
73 | if (ret < 0) |
74 | return ret; | |
75 | return 0; | |
76 | } | |
77 | ||
f7b422b1 | 78 | void nfs_clear_inode(struct inode *inode) |
1da177e4 LT |
79 | { |
80 | struct nfs_inode *nfsi = NFS_I(inode); | |
81 | struct rpc_cred *cred; | |
82 | ||
da6d503a TM |
83 | /* |
84 | * The following should never happen... | |
85 | */ | |
86 | BUG_ON(nfs_have_writebacks(inode)); | |
1da177e4 | 87 | BUG_ON (!list_empty(&nfsi->open_files)); |
ada70d94 | 88 | nfs_zap_acl_cache(inode); |
1da177e4 LT |
89 | cred = nfsi->cache_access.cred; |
90 | if (cred) | |
91 | put_rpccred(cred); | |
92 | BUG_ON(atomic_read(&nfsi->data_updates) != 0); | |
93 | } | |
94 | ||
29884df0 TM |
95 | /** |
96 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
97 | */ | |
98 | int nfs_sync_mapping(struct address_space *mapping) | |
99 | { | |
100 | int ret; | |
101 | ||
102 | if (mapping->nrpages == 0) | |
103 | return 0; | |
104 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 105 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
106 | if (ret != 0) |
107 | goto out; | |
108 | ret = nfs_wb_all(mapping->host); | |
109 | out: | |
110 | return ret; | |
111 | } | |
112 | ||
1da177e4 LT |
113 | /* |
114 | * Invalidate the local caches | |
115 | */ | |
b37b03b7 | 116 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
117 | { |
118 | struct nfs_inode *nfsi = NFS_I(inode); | |
119 | int mode = inode->i_mode; | |
120 | ||
91d5b470 CL |
121 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
122 | ||
1da177e4 LT |
123 | NFS_ATTRTIMEO(inode) = NFS_MINATTRTIMEO(inode); |
124 | NFS_ATTRTIMEO_UPDATE(inode) = jiffies; | |
125 | ||
126 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
127 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 128 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 129 | else |
55296809 | 130 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 131 | } |
dc59250c | 132 | |
b37b03b7 TM |
133 | void nfs_zap_caches(struct inode *inode) |
134 | { | |
135 | spin_lock(&inode->i_lock); | |
136 | nfs_zap_caches_locked(inode); | |
dc59250c | 137 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
138 | } |
139 | ||
140 | static void nfs_zap_acl_cache(struct inode *inode) | |
141 | { | |
142 | void (*clear_acl_cache)(struct inode *); | |
143 | ||
144 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
145 | if (clear_acl_cache != NULL) | |
146 | clear_acl_cache(inode); | |
dc59250c | 147 | spin_lock(&inode->i_lock); |
55296809 | 148 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 149 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
150 | } |
151 | ||
152 | /* | |
b37b03b7 TM |
153 | * Invalidate, but do not unhash, the inode. |
154 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 155 | */ |
b37b03b7 | 156 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 157 | { |
b37b03b7 TM |
158 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
159 | nfs_zap_caches_locked(inode); | |
1da177e4 LT |
160 | } |
161 | ||
162 | struct nfs_find_desc { | |
163 | struct nfs_fh *fh; | |
164 | struct nfs_fattr *fattr; | |
165 | }; | |
166 | ||
167 | /* | |
168 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
169 | * this, and re-exported directories (also seen in NFSv2) | |
170 | * we are forced to allow 2 different inodes to have the same | |
171 | * i_ino. | |
172 | */ | |
173 | static int | |
174 | nfs_find_actor(struct inode *inode, void *opaque) | |
175 | { | |
176 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
177 | struct nfs_fh *fh = desc->fh; | |
178 | struct nfs_fattr *fattr = desc->fattr; | |
179 | ||
180 | if (NFS_FILEID(inode) != fattr->fileid) | |
181 | return 0; | |
182 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
183 | return 0; | |
184 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
185 | return 0; | |
186 | return 1; | |
187 | } | |
188 | ||
189 | static int | |
190 | nfs_init_locked(struct inode *inode, void *opaque) | |
191 | { | |
192 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
193 | struct nfs_fattr *fattr = desc->fattr; | |
194 | ||
195 | NFS_FILEID(inode) = fattr->fileid; | |
196 | nfs_copy_fh(NFS_FH(inode), desc->fh); | |
197 | return 0; | |
198 | } | |
199 | ||
200 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
201 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
202 | ||
203 | /* | |
204 | * This is our front-end to iget that looks up inodes by file handle | |
205 | * instead of inode number. | |
206 | */ | |
207 | struct inode * | |
208 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
209 | { | |
210 | struct nfs_find_desc desc = { | |
211 | .fh = fh, | |
212 | .fattr = fattr | |
213 | }; | |
03f28e3a | 214 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
215 | unsigned long hash; |
216 | ||
217 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
218 | goto out_no_inode; | |
219 | ||
220 | if (!fattr->nlink) { | |
221 | printk("NFS: Buggy server - nlink == 0!\n"); | |
222 | goto out_no_inode; | |
223 | } | |
224 | ||
225 | hash = nfs_fattr_to_ino_t(fattr); | |
226 | ||
03f28e3a TM |
227 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
228 | if (inode == NULL) { | |
229 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 230 | goto out_no_inode; |
03f28e3a | 231 | } |
1da177e4 LT |
232 | |
233 | if (inode->i_state & I_NEW) { | |
234 | struct nfs_inode *nfsi = NFS_I(inode); | |
235 | ||
236 | /* We set i_ino for the few things that still rely on it, | |
237 | * such as stat(2) */ | |
238 | inode->i_ino = hash; | |
239 | ||
240 | /* We can't support update_atime(), since the server will reset it */ | |
241 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
242 | inode->i_mode = fattr->mode; | |
243 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
244 | * that's precisely what we have in nfs_file_inode_operations. | |
245 | */ | |
92cfc62c | 246 | inode->i_op = NFS_SB(sb)->rpc_ops->file_inode_ops; |
1da177e4 LT |
247 | if (S_ISREG(inode->i_mode)) { |
248 | inode->i_fop = &nfs_file_operations; | |
249 | inode->i_data.a_ops = &nfs_file_aops; | |
250 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
251 | } else if (S_ISDIR(inode->i_mode)) { | |
252 | inode->i_op = NFS_SB(sb)->rpc_ops->dir_inode_ops; | |
253 | inode->i_fop = &nfs_dir_operations; | |
254 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
255 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
412d582e | 256 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
55a97593 TM |
257 | /* Deal with crossing mountpoints */ |
258 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
259 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
260 | inode->i_op = &nfs_referral_inode_operations; | |
261 | else | |
262 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 TM |
263 | inode->i_fop = NULL; |
264 | } | |
1da177e4 LT |
265 | } else if (S_ISLNK(inode->i_mode)) |
266 | inode->i_op = &nfs_symlink_inode_operations; | |
267 | else | |
268 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
269 | ||
33801147 TM |
270 | nfsi->read_cache_jiffies = fattr->time_start; |
271 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
272 | inode->i_atime = fattr->atime; |
273 | inode->i_mtime = fattr->mtime; | |
274 | inode->i_ctime = fattr->ctime; | |
275 | if (fattr->valid & NFS_ATTR_FATTR_V4) | |
276 | nfsi->change_attr = fattr->change_attr; | |
277 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
278 | inode->i_nlink = fattr->nlink; | |
279 | inode->i_uid = fattr->uid; | |
280 | inode->i_gid = fattr->gid; | |
281 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
282 | /* | |
283 | * report the blocks in 512byte units | |
284 | */ | |
285 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
286 | inode->i_blksize = inode->i_sb->s_blocksize; | |
287 | } else { | |
288 | inode->i_blocks = fattr->du.nfs2.blocks; | |
289 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
290 | } | |
291 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
292 | nfsi->attrtimeo_timestamp = jiffies; | |
293 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
294 | nfsi->cache_access.cred = NULL; | |
295 | ||
296 | unlock_new_inode(inode); | |
297 | } else | |
298 | nfs_refresh_inode(inode, fattr); | |
299 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
300 | inode->i_sb->s_id, | |
301 | (long long)NFS_FILEID(inode), | |
302 | atomic_read(&inode->i_count)); | |
303 | ||
304 | out: | |
305 | return inode; | |
306 | ||
307 | out_no_inode: | |
03f28e3a | 308 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
309 | goto out; |
310 | } | |
311 | ||
312 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) | |
313 | ||
314 | int | |
315 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
316 | { | |
317 | struct inode *inode = dentry->d_inode; | |
318 | struct nfs_fattr fattr; | |
319 | int error; | |
320 | ||
91d5b470 CL |
321 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
322 | ||
1da177e4 LT |
323 | if (attr->ia_valid & ATTR_SIZE) { |
324 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
325 | attr->ia_valid &= ~ATTR_SIZE; | |
326 | } | |
327 | ||
328 | /* Optimization: if the end result is no change, don't RPC */ | |
329 | attr->ia_valid &= NFS_VALID_ATTRS; | |
330 | if (attr->ia_valid == 0) | |
331 | return 0; | |
332 | ||
333 | lock_kernel(); | |
334 | nfs_begin_data_update(inode); | |
755c1e20 TM |
335 | /* Write all dirty data */ |
336 | filemap_write_and_wait(inode->i_mapping); | |
337 | nfs_wb_all(inode); | |
642ac549 TM |
338 | /* |
339 | * Return any delegations if we're going to change ACLs | |
340 | */ | |
341 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
342 | nfs_inode_return_delegation(inode); | |
1da177e4 | 343 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 344 | if (error == 0) |
1da177e4 | 345 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
346 | nfs_end_data_update(inode); |
347 | unlock_kernel(); | |
348 | return error; | |
349 | } | |
350 | ||
351 | /** | |
352 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
353 | * @inode: pointer to struct inode | |
354 | * @attr: pointer to struct iattr | |
355 | * | |
356 | * Note: we do this in the *proc.c in order to ensure that | |
357 | * it works for things like exclusive creates too. | |
358 | */ | |
359 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
360 | { | |
361 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
1da177e4 | 362 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
363 | int mode = attr->ia_mode & S_IALLUGO; |
364 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
365 | inode->i_mode = mode; |
366 | } | |
367 | if ((attr->ia_valid & ATTR_UID) != 0) | |
368 | inode->i_uid = attr->ia_uid; | |
369 | if ((attr->ia_valid & ATTR_GID) != 0) | |
370 | inode->i_gid = attr->ia_gid; | |
dc59250c | 371 | spin_lock(&inode->i_lock); |
55296809 | 372 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 373 | spin_unlock(&inode->i_lock); |
65e4308d TM |
374 | } |
375 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 376 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
65e4308d TM |
377 | inode->i_size = attr->ia_size; |
378 | vmtruncate(inode, attr->ia_size); | |
379 | } | |
1da177e4 LT |
380 | } |
381 | ||
412d582e CL |
382 | static int nfs_wait_schedule(void *word) |
383 | { | |
384 | if (signal_pending(current)) | |
385 | return -ERESTARTSYS; | |
386 | schedule(); | |
387 | return 0; | |
388 | } | |
389 | ||
1da177e4 LT |
390 | /* |
391 | * Wait for the inode to get unlocked. | |
1da177e4 | 392 | */ |
412d582e | 393 | static int nfs_wait_on_inode(struct inode *inode) |
1da177e4 LT |
394 | { |
395 | struct rpc_clnt *clnt = NFS_CLIENT(inode); | |
396 | struct nfs_inode *nfsi = NFS_I(inode); | |
412d582e | 397 | sigset_t oldmask; |
1da177e4 | 398 | int error; |
412d582e | 399 | |
412d582e CL |
400 | rpc_clnt_sigmask(clnt, &oldmask); |
401 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, | |
402 | nfs_wait_schedule, TASK_INTERRUPTIBLE); | |
403 | rpc_clnt_sigunmask(clnt, &oldmask); | |
412d582e | 404 | |
1da177e4 LT |
405 | return error; |
406 | } | |
407 | ||
412d582e CL |
408 | static void nfs_wake_up_inode(struct inode *inode) |
409 | { | |
410 | struct nfs_inode *nfsi = NFS_I(inode); | |
411 | ||
412 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); | |
413 | smp_mb__after_clear_bit(); | |
414 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); | |
415 | } | |
416 | ||
1da177e4 LT |
417 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
418 | { | |
419 | struct inode *inode = dentry->d_inode; | |
55296809 | 420 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
421 | int err; |
422 | ||
70b9ecbd | 423 | /* Flush out writes to the server in order to update c/mtime */ |
c42de9dd | 424 | nfs_sync_inode_wait(inode, 0, 0, FLUSH_NOCOMMIT); |
fc33a7bb CH |
425 | |
426 | /* | |
427 | * We may force a getattr if the user cares about atime. | |
428 | * | |
429 | * Note that we only have to check the vfsmount flags here: | |
430 | * - NFS always sets S_NOATIME by so checking it would give a | |
431 | * bogus result | |
432 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
433 | * no point in checking those. | |
434 | */ | |
435 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
436 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 437 | need_atime = 0; |
fc33a7bb | 438 | |
1da177e4 LT |
439 | if (need_atime) |
440 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
441 | else | |
442 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
443 | if (!err) | |
444 | generic_fillattr(inode, stat); | |
445 | return err; | |
446 | } | |
447 | ||
b92dccf6 | 448 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
449 | { |
450 | struct nfs_open_context *ctx; | |
451 | ||
452 | ctx = (struct nfs_open_context *)kmalloc(sizeof(*ctx), GFP_KERNEL); | |
453 | if (ctx != NULL) { | |
454 | atomic_set(&ctx->count, 1); | |
455 | ctx->dentry = dget(dentry); | |
b92dccf6 | 456 | ctx->vfsmnt = mntget(mnt); |
1da177e4 LT |
457 | ctx->cred = get_rpccred(cred); |
458 | ctx->state = NULL; | |
459 | ctx->lockowner = current->files; | |
460 | ctx->error = 0; | |
00a92642 | 461 | ctx->dir_cookie = 0; |
1da177e4 LT |
462 | } |
463 | return ctx; | |
464 | } | |
465 | ||
466 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
467 | { | |
468 | if (ctx != NULL) | |
469 | atomic_inc(&ctx->count); | |
470 | return ctx; | |
471 | } | |
472 | ||
473 | void put_nfs_open_context(struct nfs_open_context *ctx) | |
474 | { | |
475 | if (atomic_dec_and_test(&ctx->count)) { | |
476 | if (!list_empty(&ctx->list)) { | |
477 | struct inode *inode = ctx->dentry->d_inode; | |
478 | spin_lock(&inode->i_lock); | |
479 | list_del(&ctx->list); | |
480 | spin_unlock(&inode->i_lock); | |
481 | } | |
482 | if (ctx->state != NULL) | |
483 | nfs4_close_state(ctx->state, ctx->mode); | |
484 | if (ctx->cred != NULL) | |
485 | put_rpccred(ctx->cred); | |
486 | dput(ctx->dentry); | |
b92dccf6 | 487 | mntput(ctx->vfsmnt); |
1da177e4 LT |
488 | kfree(ctx); |
489 | } | |
490 | } | |
491 | ||
492 | /* | |
493 | * Ensure that mmap has a recent RPC credential for use when writing out | |
494 | * shared pages | |
495 | */ | |
b92dccf6 | 496 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 LT |
497 | { |
498 | struct inode *inode = filp->f_dentry->d_inode; | |
499 | struct nfs_inode *nfsi = NFS_I(inode); | |
500 | ||
501 | filp->private_data = get_nfs_open_context(ctx); | |
502 | spin_lock(&inode->i_lock); | |
503 | list_add(&ctx->list, &nfsi->open_files); | |
504 | spin_unlock(&inode->i_lock); | |
505 | } | |
506 | ||
d530838b TM |
507 | /* |
508 | * Given an inode, search for an open context with the desired characteristics | |
509 | */ | |
510 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) | |
1da177e4 LT |
511 | { |
512 | struct nfs_inode *nfsi = NFS_I(inode); | |
513 | struct nfs_open_context *pos, *ctx = NULL; | |
514 | ||
515 | spin_lock(&inode->i_lock); | |
516 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
517 | if (cred != NULL && pos->cred != cred) |
518 | continue; | |
1da177e4 LT |
519 | if ((pos->mode & mode) == mode) { |
520 | ctx = get_nfs_open_context(pos); | |
521 | break; | |
522 | } | |
523 | } | |
524 | spin_unlock(&inode->i_lock); | |
525 | return ctx; | |
526 | } | |
527 | ||
b92dccf6 | 528 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 LT |
529 | { |
530 | struct inode *inode = filp->f_dentry->d_inode; | |
531 | struct nfs_open_context *ctx = (struct nfs_open_context *)filp->private_data; | |
532 | ||
533 | if (ctx) { | |
534 | filp->private_data = NULL; | |
535 | spin_lock(&inode->i_lock); | |
536 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
537 | spin_unlock(&inode->i_lock); | |
538 | put_nfs_open_context(ctx); | |
539 | } | |
540 | } | |
541 | ||
542 | /* | |
543 | * These allocate and release file read/write context information. | |
544 | */ | |
545 | int nfs_open(struct inode *inode, struct file *filp) | |
546 | { | |
547 | struct nfs_open_context *ctx; | |
548 | struct rpc_cred *cred; | |
549 | ||
550 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); | |
551 | if (IS_ERR(cred)) | |
552 | return PTR_ERR(cred); | |
b92dccf6 | 553 | ctx = alloc_nfs_open_context(filp->f_vfsmnt, filp->f_dentry, cred); |
1da177e4 LT |
554 | put_rpccred(cred); |
555 | if (ctx == NULL) | |
556 | return -ENOMEM; | |
557 | ctx->mode = filp->f_mode; | |
558 | nfs_file_set_open_context(filp, ctx); | |
559 | put_nfs_open_context(ctx); | |
1da177e4 LT |
560 | return 0; |
561 | } | |
562 | ||
563 | int nfs_release(struct inode *inode, struct file *filp) | |
564 | { | |
1da177e4 LT |
565 | nfs_file_clear_open_context(filp); |
566 | return 0; | |
567 | } | |
568 | ||
569 | /* | |
570 | * This function is called whenever some part of NFS notices that | |
571 | * the cached attributes have to be refreshed. | |
572 | */ | |
573 | int | |
574 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
575 | { | |
576 | int status = -ESTALE; | |
577 | struct nfs_fattr fattr; | |
578 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
579 | |
580 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
581 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
582 | ||
1842bfb4 | 583 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 LT |
584 | lock_kernel(); |
585 | if (!inode || is_bad_inode(inode)) | |
586 | goto out_nowait; | |
587 | if (NFS_STALE(inode)) | |
588 | goto out_nowait; | |
589 | ||
412d582e CL |
590 | status = nfs_wait_on_inode(inode); |
591 | if (status < 0) | |
592 | goto out; | |
593 | if (NFS_STALE(inode)) { | |
594 | status = -ESTALE; | |
595 | /* Do we trust the cached ESTALE? */ | |
596 | if (NFS_ATTRTIMEO(inode) != 0) { | |
44b11874 | 597 | if (nfsi->cache_validity & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME)) { |
412d582e CL |
598 | /* no */ |
599 | } else | |
600 | goto out; | |
601 | } | |
1da177e4 | 602 | } |
1da177e4 | 603 | |
1da177e4 LT |
604 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
605 | if (status != 0) { | |
606 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
607 | inode->i_sb->s_id, | |
608 | (long long)NFS_FILEID(inode), status); | |
609 | if (status == -ESTALE) { | |
610 | nfs_zap_caches(inode); | |
611 | if (!S_ISDIR(inode->i_mode)) | |
412d582e | 612 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
1da177e4 LT |
613 | } |
614 | goto out; | |
615 | } | |
616 | ||
33801147 | 617 | spin_lock(&inode->i_lock); |
24aa1fe6 | 618 | status = nfs_update_inode(inode, &fattr); |
1da177e4 | 619 | if (status) { |
33801147 | 620 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
621 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
622 | inode->i_sb->s_id, | |
623 | (long long)NFS_FILEID(inode), status); | |
624 | goto out; | |
625 | } | |
dc59250c | 626 | spin_unlock(&inode->i_lock); |
55296809 | 627 | |
24aa1fe6 | 628 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 629 | nfs_zap_acl_cache(inode); |
55296809 | 630 | |
1da177e4 LT |
631 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
632 | inode->i_sb->s_id, | |
633 | (long long)NFS_FILEID(inode)); | |
634 | ||
412d582e CL |
635 | out: |
636 | nfs_wake_up_inode(inode); | |
637 | ||
1da177e4 LT |
638 | out_nowait: |
639 | unlock_kernel(); | |
640 | return status; | |
641 | } | |
642 | ||
643 | int nfs_attribute_timeout(struct inode *inode) | |
644 | { | |
645 | struct nfs_inode *nfsi = NFS_I(inode); | |
646 | ||
647 | if (nfs_have_delegation(inode, FMODE_READ)) | |
648 | return 0; | |
649 | return time_after(jiffies, nfsi->read_cache_jiffies+nfsi->attrtimeo); | |
650 | } | |
651 | ||
652 | /** | |
653 | * nfs_revalidate_inode - Revalidate the inode attributes | |
654 | * @server - pointer to nfs_server struct | |
655 | * @inode - pointer to inode struct | |
656 | * | |
657 | * Updates inode attribute information by retrieving the data from the server. | |
658 | */ | |
659 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
660 | { | |
44b11874 | 661 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
662 | && !nfs_attribute_timeout(inode)) |
663 | return NFS_STALE(inode) ? -ESTALE : 0; | |
664 | return __nfs_revalidate_inode(server, inode); | |
665 | } | |
666 | ||
7d52e862 TM |
667 | /** |
668 | * nfs_revalidate_mapping - Revalidate the pagecache | |
669 | * @inode - pointer to host inode | |
670 | * @mapping - pointer to mapping | |
671 | */ | |
44b11874 | 672 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
673 | { |
674 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
675 | int ret = 0; |
676 | ||
677 | if (NFS_STALE(inode)) | |
678 | ret = -ESTALE; | |
679 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
680 | || nfs_attribute_timeout(inode)) | |
681 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
7d52e862 | 682 | |
55296809 | 683 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) { |
91d5b470 | 684 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
29884df0 TM |
685 | if (S_ISREG(inode->i_mode)) |
686 | nfs_sync_mapping(mapping); | |
7d52e862 | 687 | invalidate_inode_pages2(mapping); |
dc59250c CL |
688 | |
689 | spin_lock(&inode->i_lock); | |
55296809 | 690 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
7d52e862 TM |
691 | if (S_ISDIR(inode->i_mode)) { |
692 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
693 | /* This ensures we revalidate child dentries */ | |
913a70fc | 694 | nfsi->cache_change_attribute = jiffies; |
7d52e862 | 695 | } |
dc59250c CL |
696 | spin_unlock(&inode->i_lock); |
697 | ||
7d52e862 TM |
698 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", |
699 | inode->i_sb->s_id, | |
700 | (long long)NFS_FILEID(inode)); | |
701 | } | |
44b11874 | 702 | return ret; |
7d52e862 TM |
703 | } |
704 | ||
1da177e4 LT |
705 | /** |
706 | * nfs_begin_data_update | |
707 | * @inode - pointer to inode | |
708 | * Declare that a set of operations will update file data on the server | |
709 | */ | |
710 | void nfs_begin_data_update(struct inode *inode) | |
711 | { | |
712 | atomic_inc(&NFS_I(inode)->data_updates); | |
713 | } | |
714 | ||
715 | /** | |
716 | * nfs_end_data_update | |
717 | * @inode - pointer to inode | |
718 | * Declare end of the operations that will update file data | |
719 | * This will mark the inode as immediately needing revalidation | |
720 | * of its attribute cache. | |
721 | */ | |
722 | void nfs_end_data_update(struct inode *inode) | |
723 | { | |
724 | struct nfs_inode *nfsi = NFS_I(inode); | |
725 | ||
726 | if (!nfs_have_delegation(inode, FMODE_READ)) { | |
decf491f TM |
727 | /* Directories and symlinks: invalidate page cache */ |
728 | if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) { | |
729 | spin_lock(&inode->i_lock); | |
55296809 | 730 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; |
decf491f TM |
731 | spin_unlock(&inode->i_lock); |
732 | } | |
1da177e4 | 733 | } |
913a70fc | 734 | nfsi->cache_change_attribute = jiffies; |
1da177e4 LT |
735 | atomic_dec(&nfsi->data_updates); |
736 | } | |
737 | ||
a895b4a1 TM |
738 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
739 | { | |
740 | struct nfs_inode *nfsi = NFS_I(inode); | |
741 | ||
a895b4a1 TM |
742 | /* If we have atomic WCC data, we may update some attributes */ |
743 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { | |
744 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { | |
745 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
746 | nfsi->cache_change_attribute = jiffies; | |
747 | } | |
748 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
749 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
750 | nfsi->cache_change_attribute = jiffies; | |
751 | } | |
752 | if (inode->i_size == fattr->pre_size && nfsi->npages == 0) { | |
753 | inode->i_size = fattr->size; | |
754 | nfsi->cache_change_attribute = jiffies; | |
755 | } | |
756 | } | |
757 | } | |
758 | ||
1da177e4 | 759 | /** |
33801147 | 760 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
761 | * @inode - pointer to inode |
762 | * @fattr - updated attributes | |
763 | * | |
764 | * Verifies the attribute cache. If we have just changed the attributes, | |
765 | * so that fattr carries weak cache consistency data, then it may | |
766 | * also update the ctime/mtime/change_attribute. | |
767 | */ | |
33801147 | 768 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
769 | { |
770 | struct nfs_inode *nfsi = NFS_I(inode); | |
771 | loff_t cur_size, new_isize; | |
772 | int data_unstable; | |
773 | ||
dc59250c | 774 | |
ca62b9c3 TM |
775 | /* Has the inode gone and changed behind our back? */ |
776 | if (nfsi->fileid != fattr->fileid | |
777 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { | |
778 | return -EIO; | |
779 | } | |
780 | ||
1da177e4 LT |
781 | /* Are we in the process of updating data on the server? */ |
782 | data_unstable = nfs_caches_unstable(inode); | |
783 | ||
a895b4a1 TM |
784 | /* Do atomic weak cache consistency updates */ |
785 | nfs_wcc_update_inode(inode, fattr); | |
1da177e4 | 786 | |
9d1e9232 | 787 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
f1bb0b92 TM |
788 | nfsi->change_attr != fattr->change_attr) |
789 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 790 | |
1da177e4 | 791 | /* Verify a few of the more important attributes */ |
f1bb0b92 TM |
792 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
793 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
ca62b9c3 TM |
794 | |
795 | cur_size = i_size_read(inode); | |
796 | new_isize = nfs_size_to_loff_t(fattr->size); | |
fb374d24 TM |
797 | if (cur_size != new_isize && nfsi->npages == 0) |
798 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 LT |
799 | |
800 | /* Have any file permissions changed? */ | |
801 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) | |
802 | || inode->i_uid != fattr->uid | |
803 | || inode->i_gid != fattr->gid) | |
55296809 | 804 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
805 | |
806 | /* Has the link count changed? */ | |
807 | if (inode->i_nlink != fattr->nlink) | |
55296809 | 808 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
809 | |
810 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) | |
55296809 | 811 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
1da177e4 | 812 | |
33801147 | 813 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
814 | return 0; |
815 | } | |
816 | ||
33801147 TM |
817 | /** |
818 | * nfs_refresh_inode - try to update the inode attribute cache | |
819 | * @inode - pointer to inode | |
820 | * @fattr - updated attributes | |
821 | * | |
822 | * Check that an RPC call that returned attributes has not overlapped with | |
823 | * other recent updates of the inode metadata, then decide whether it is | |
824 | * safe to do a full update of the inode attributes, or whether just to | |
825 | * call nfs_check_inode_attributes. | |
826 | */ | |
827 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
828 | { | |
829 | struct nfs_inode *nfsi = NFS_I(inode); | |
830 | int status; | |
831 | ||
832 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
833 | return 0; | |
834 | spin_lock(&inode->i_lock); | |
33801147 | 835 | if (time_after(fattr->time_start, nfsi->last_updated)) |
24aa1fe6 | 836 | status = nfs_update_inode(inode, fattr); |
33801147 TM |
837 | else |
838 | status = nfs_check_inode_attributes(inode, fattr); | |
839 | ||
840 | spin_unlock(&inode->i_lock); | |
841 | return status; | |
842 | } | |
843 | ||
decf491f TM |
844 | /** |
845 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
846 | * @inode - pointer to inode | |
847 | * @fattr - updated attributes | |
848 | * | |
849 | * After an operation that has changed the inode metadata, mark the | |
850 | * attribute cache as being invalid, then try to update it. | |
851 | */ | |
852 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
853 | { | |
854 | struct nfs_inode *nfsi = NFS_I(inode); | |
855 | int status = 0; | |
856 | ||
857 | spin_lock(&inode->i_lock); | |
858 | if (unlikely((fattr->valid & NFS_ATTR_FATTR) == 0)) { | |
f1bb0b92 | 859 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
decf491f TM |
860 | goto out; |
861 | } | |
24aa1fe6 | 862 | status = nfs_update_inode(inode, fattr); |
decf491f TM |
863 | out: |
864 | spin_unlock(&inode->i_lock); | |
865 | return status; | |
866 | } | |
867 | ||
1da177e4 LT |
868 | /* |
869 | * Many nfs protocol calls return the new file attributes after | |
870 | * an operation. Here we update the inode to reflect the state | |
871 | * of the server's inode. | |
872 | * | |
873 | * This is a bit tricky because we have to make sure all dirty pages | |
874 | * have been sent off to the server before calling invalidate_inode_pages. | |
875 | * To make sure no other process adds more write requests while we try | |
876 | * our best to flush them, we make them sleep during the attribute refresh. | |
877 | * | |
878 | * A very similar scenario holds for the dir cache. | |
879 | */ | |
24aa1fe6 | 880 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 881 | { |
8b4bdcf8 | 882 | struct nfs_server *server; |
1da177e4 | 883 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 884 | loff_t cur_isize, new_isize; |
1da177e4 | 885 | unsigned int invalid = 0; |
24aa1fe6 | 886 | int data_stable; |
1da177e4 LT |
887 | |
888 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
889 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, | |
890 | atomic_read(&inode->i_count), fattr->valid); | |
891 | ||
325cfed9 CL |
892 | if (nfsi->fileid != fattr->fileid) |
893 | goto out_fileid; | |
1da177e4 LT |
894 | |
895 | /* | |
896 | * Make sure the inode's type hasn't changed. | |
897 | */ | |
33801147 | 898 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
899 | goto out_changed; |
900 | ||
8b4bdcf8 TM |
901 | server = NFS_SERVER(inode); |
902 | /* Update the fsid if and only if this is the root directory */ | |
903 | if (inode == inode->i_sb->s_root->d_inode | |
904 | && !nfs_fsid_equal(&server->fsid, &fattr->fsid)) | |
905 | server->fsid = fattr->fsid; | |
906 | ||
1da177e4 LT |
907 | /* |
908 | * Update the read time so we don't revalidate too often. | |
909 | */ | |
33801147 TM |
910 | nfsi->read_cache_jiffies = fattr->time_start; |
911 | nfsi->last_updated = jiffies; | |
1da177e4 LT |
912 | |
913 | /* Are we racing with known updates of the metadata on the server? */ | |
24aa1fe6 TM |
914 | data_stable = nfs_verify_change_attribute(inode, fattr->time_start); |
915 | if (data_stable) | |
f1bb0b92 | 916 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE|NFS_INO_INVALID_ATIME); |
1da177e4 | 917 | |
a895b4a1 TM |
918 | /* Do atomic weak cache consistency updates */ |
919 | nfs_wcc_update_inode(inode, fattr); | |
920 | ||
951a143b | 921 | /* Check if our cached file size is stale */ |
1da177e4 LT |
922 | new_isize = nfs_size_to_loff_t(fattr->size); |
923 | cur_isize = i_size_read(inode); | |
951a143b TM |
924 | if (new_isize != cur_isize) { |
925 | /* Do we perhaps have any outstanding writes? */ | |
926 | if (nfsi->npages == 0) { | |
927 | /* No, but did we race with nfs_end_data_update()? */ | |
24aa1fe6 | 928 | if (data_stable) { |
1da177e4 | 929 | inode->i_size = new_isize; |
951a143b | 930 | invalid |= NFS_INO_INVALID_DATA; |
1da177e4 | 931 | } |
951a143b TM |
932 | invalid |= NFS_INO_INVALID_ATTR; |
933 | } else if (new_isize > cur_isize) { | |
1da177e4 LT |
934 | inode->i_size = new_isize; |
935 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
936 | } | |
24aa1fe6 | 937 | nfsi->cache_change_attribute = jiffies; |
951a143b TM |
938 | dprintk("NFS: isize change on server for file %s/%ld\n", |
939 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
940 | } |
941 | ||
951a143b | 942 | /* Check if the mtime agrees */ |
1da177e4 LT |
943 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { |
944 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
951a143b TM |
945 | dprintk("NFS: mtime change on server for file %s/%ld\n", |
946 | inode->i_sb->s_id, inode->i_ino); | |
24aa1fe6 TM |
947 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; |
948 | nfsi->cache_change_attribute = jiffies; | |
1da177e4 LT |
949 | } |
950 | ||
ada70d94 TM |
951 | /* If ctime has changed we should definitely clear access+acl caches */ |
952 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) { | |
24aa1fe6 | 953 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
ada70d94 | 954 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
24aa1fe6 | 955 | nfsi->cache_change_attribute = jiffies; |
ada70d94 | 956 | } |
1da177e4 LT |
957 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
958 | ||
959 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || | |
960 | inode->i_uid != fattr->uid || | |
961 | inode->i_gid != fattr->gid) | |
ada70d94 | 962 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1da177e4 LT |
963 | |
964 | inode->i_mode = fattr->mode; | |
965 | inode->i_nlink = fattr->nlink; | |
966 | inode->i_uid = fattr->uid; | |
967 | inode->i_gid = fattr->gid; | |
968 | ||
969 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
970 | /* | |
971 | * report the blocks in 512byte units | |
972 | */ | |
973 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
974 | inode->i_blksize = inode->i_sb->s_blocksize; | |
975 | } else { | |
976 | inode->i_blocks = fattr->du.nfs2.blocks; | |
977 | inode->i_blksize = fattr->du.nfs2.blocksize; | |
978 | } | |
979 | ||
9d1e9232 TM |
980 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
981 | nfsi->change_attr != fattr->change_attr) { | |
982 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
983 | inode->i_sb->s_id, inode->i_ino); | |
984 | nfsi->change_attr = fattr->change_attr; | |
985 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
986 | nfsi->cache_change_attribute = jiffies; | |
ca62b9c3 TM |
987 | } |
988 | ||
1da177e4 LT |
989 | /* Update attrtimeo value if we're out of the unstable period */ |
990 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 991 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 LT |
992 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
993 | nfsi->attrtimeo_timestamp = jiffies; | |
994 | } else if (time_after(jiffies, nfsi->attrtimeo_timestamp+nfsi->attrtimeo)) { | |
995 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) | |
996 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
997 | nfsi->attrtimeo_timestamp = jiffies; | |
998 | } | |
999 | /* Don't invalidate the data if we were to blame */ | |
1000 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1001 | || S_ISLNK(inode->i_mode))) | |
1002 | invalid &= ~NFS_INO_INVALID_DATA; | |
24aa1fe6 TM |
1003 | if (data_stable) |
1004 | invalid &= ~(NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ATIME|NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1005 | if (!nfs_have_delegation(inode, FMODE_READ)) |
55296809 | 1006 | nfsi->cache_validity |= invalid; |
1da177e4 LT |
1007 | |
1008 | return 0; | |
1009 | out_changed: | |
1010 | /* | |
1011 | * Big trouble! The inode has become a different object. | |
1012 | */ | |
1013 | #ifdef NFS_PARANOIA | |
1014 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", | |
1015 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); | |
1016 | #endif | |
b37b03b7 | 1017 | out_err: |
1da177e4 LT |
1018 | /* |
1019 | * No need to worry about unhashing the dentry, as the | |
1020 | * lookup validation will know that the inode is bad. | |
1021 | * (But we fall through to invalidate the caches.) | |
1022 | */ | |
1023 | nfs_invalidate_inode(inode); | |
1da177e4 | 1024 | return -ESTALE; |
325cfed9 CL |
1025 | |
1026 | out_fileid: | |
1027 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1028 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1029 | NFS_SERVER(inode)->hostname, inode->i_sb->s_id, | |
1030 | (long long)nfsi->fileid, (long long)fattr->fileid); | |
1031 | goto out_err; | |
1da177e4 LT |
1032 | } |
1033 | ||
55a97593 | 1034 | |
1da177e4 LT |
1035 | #ifdef CONFIG_NFS_V4 |
1036 | ||
1da177e4 LT |
1037 | /* |
1038 | * Clean out any remaining NFSv4 state that might be left over due | |
1039 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1040 | * nfs_open(). | |
1041 | */ | |
f7b422b1 | 1042 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 LT |
1043 | { |
1044 | struct nfs_inode *nfsi = NFS_I(inode); | |
1045 | ||
1046 | /* If we are holding a delegation, return it! */ | |
cae7a073 | 1047 | nfs_inode_return_delegation(inode); |
1da177e4 LT |
1048 | /* First call standard NFS clear_inode() code */ |
1049 | nfs_clear_inode(inode); | |
1050 | /* Now clear out any remaining state */ | |
1051 | while (!list_empty(&nfsi->open_states)) { | |
1052 | struct nfs4_state *state; | |
1053 | ||
1054 | state = list_entry(nfsi->open_states.next, | |
1055 | struct nfs4_state, | |
1056 | inode_states); | |
1057 | dprintk("%s(%s/%Ld): found unclaimed NFSv4 state %p\n", | |
1058 | __FUNCTION__, | |
1059 | inode->i_sb->s_id, | |
1060 | (long long)NFS_FILEID(inode), | |
1061 | state); | |
1062 | BUG_ON(atomic_read(&state->count) != 1); | |
1063 | nfs4_close_state(state, state->state); | |
1064 | } | |
1065 | } | |
1da177e4 LT |
1066 | #endif |
1067 | ||
f7b422b1 | 1068 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1069 | { |
1070 | struct nfs_inode *nfsi; | |
1071 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, SLAB_KERNEL); | |
1072 | if (!nfsi) | |
1073 | return NULL; | |
55296809 CL |
1074 | nfsi->flags = 0UL; |
1075 | nfsi->cache_validity = 0UL; | |
223db122 | 1076 | nfsi->cache_change_attribute = jiffies; |
458818ed TM |
1077 | #ifdef CONFIG_NFS_V3_ACL |
1078 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1079 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1080 | #endif | |
e50a1c2e BF |
1081 | #ifdef CONFIG_NFS_V4 |
1082 | nfsi->nfs4_acl = NULL; | |
1083 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1084 | return &nfsi->vfs_inode; |
1085 | } | |
1086 | ||
f7b422b1 | 1087 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1088 | { |
1089 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1090 | } | |
1091 | ||
d75d5414 AM |
1092 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1093 | { | |
1094 | #ifdef CONFIG_NFS_V4 | |
1095 | INIT_LIST_HEAD(&nfsi->open_states); | |
1096 | nfsi->delegation = NULL; | |
1097 | nfsi->delegation_state = 0; | |
1098 | init_rwsem(&nfsi->rwsem); | |
1099 | #endif | |
1100 | } | |
f7b422b1 | 1101 | |
1da177e4 LT |
1102 | static void init_once(void * foo, kmem_cache_t * cachep, unsigned long flags) |
1103 | { | |
1104 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1105 | ||
1106 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
1107 | SLAB_CTOR_CONSTRUCTOR) { | |
1108 | inode_init_once(&nfsi->vfs_inode); | |
1109 | spin_lock_init(&nfsi->req_lock); | |
1110 | INIT_LIST_HEAD(&nfsi->dirty); | |
1111 | INIT_LIST_HEAD(&nfsi->commit); | |
1112 | INIT_LIST_HEAD(&nfsi->open_files); | |
1113 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
1114 | atomic_set(&nfsi->data_updates, 0); | |
1115 | nfsi->ndirty = 0; | |
1116 | nfsi->ncommit = 0; | |
1117 | nfsi->npages = 0; | |
1da177e4 LT |
1118 | nfs4_init_once(nfsi); |
1119 | } | |
1120 | } | |
1121 | ||
f7b422b1 | 1122 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1123 | { |
1124 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1125 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1126 | 0, (SLAB_RECLAIM_ACCOUNT| |
1127 | SLAB_MEM_SPREAD), | |
1da177e4 LT |
1128 | init_once, NULL); |
1129 | if (nfs_inode_cachep == NULL) | |
1130 | return -ENOMEM; | |
1131 | ||
1132 | return 0; | |
1133 | } | |
1134 | ||
f7b422b1 | 1135 | static void __exit nfs_destroy_inodecache(void) |
1da177e4 LT |
1136 | { |
1137 | if (kmem_cache_destroy(nfs_inode_cachep)) | |
1138 | printk(KERN_INFO "nfs_inode_cache: not all structures were freed\n"); | |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | * Initialize NFS | |
1143 | */ | |
1144 | static int __init init_nfs_fs(void) | |
1145 | { | |
1146 | int err; | |
1147 | ||
1148 | err = nfs_init_nfspagecache(); | |
1149 | if (err) | |
1150 | goto out4; | |
1151 | ||
1152 | err = nfs_init_inodecache(); | |
1153 | if (err) | |
1154 | goto out3; | |
1155 | ||
1156 | err = nfs_init_readpagecache(); | |
1157 | if (err) | |
1158 | goto out2; | |
1159 | ||
1160 | err = nfs_init_writepagecache(); | |
1161 | if (err) | |
1162 | goto out1; | |
1163 | ||
1da177e4 LT |
1164 | err = nfs_init_directcache(); |
1165 | if (err) | |
1166 | goto out0; | |
1da177e4 LT |
1167 | |
1168 | #ifdef CONFIG_PROC_FS | |
1169 | rpc_proc_register(&nfs_rpcstat); | |
1170 | #endif | |
f7b422b1 | 1171 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1172 | goto out; |
1173 | return 0; | |
1174 | out: | |
1175 | #ifdef CONFIG_PROC_FS | |
1176 | rpc_proc_unregister("nfs"); | |
1177 | #endif | |
1da177e4 | 1178 | nfs_destroy_directcache(); |
6b59a754 | 1179 | out0: |
6b59a754 | 1180 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1181 | out1: |
1182 | nfs_destroy_readpagecache(); | |
1183 | out2: | |
1184 | nfs_destroy_inodecache(); | |
1185 | out3: | |
1186 | nfs_destroy_nfspagecache(); | |
1187 | out4: | |
1188 | return err; | |
1189 | } | |
1190 | ||
1191 | static void __exit exit_nfs_fs(void) | |
1192 | { | |
1da177e4 | 1193 | nfs_destroy_directcache(); |
1da177e4 LT |
1194 | nfs_destroy_writepagecache(); |
1195 | nfs_destroy_readpagecache(); | |
1196 | nfs_destroy_inodecache(); | |
1197 | nfs_destroy_nfspagecache(); | |
1198 | #ifdef CONFIG_PROC_FS | |
1199 | rpc_proc_unregister("nfs"); | |
1200 | #endif | |
f7b422b1 | 1201 | unregister_nfs_fs(); |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | /* Not quite true; I just maintain it */ | |
1205 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1206 | MODULE_LICENSE("GPL"); | |
1207 | ||
1208 | module_init(init_nfs_fs) | |
1209 | module_exit(exit_nfs_fs) |