Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
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> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
33 | #include <linux/smp_lock.h> | |
34 | #include <linux/seq_file.h> | |
35 | #include <linux/mount.h> | |
36 | #include <linux/nfs_idmap.h> | |
37 | #include <linux/vfs.h> | |
9cdb3883 MN |
38 | #include <linux/inet.h> |
39 | #include <linux/nfs_xdr.h> | |
1da177e4 LT |
40 | |
41 | #include <asm/system.h> | |
42 | #include <asm/uaccess.h> | |
43 | ||
4ce79717 | 44 | #include "nfs4_fs.h" |
a72b4422 | 45 | #include "callback.h" |
1da177e4 | 46 | #include "delegation.h" |
d9ef5a8c | 47 | #include "iostat.h" |
f7b422b1 | 48 | #include "internal.h" |
1da177e4 LT |
49 | |
50 | #define NFSDBG_FACILITY NFSDBG_VFS | |
1da177e4 | 51 | |
1da177e4 | 52 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 53 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 54 | |
ada70d94 | 55 | static void nfs_zap_acl_cache(struct inode *); |
1da177e4 | 56 | |
e18b890b | 57 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 58 | |
1da177e4 LT |
59 | static inline unsigned long |
60 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
61 | { | |
62 | return nfs_fileid_to_ino_t(fattr->fileid); | |
63 | } | |
64 | ||
f7b422b1 | 65 | int nfs_write_inode(struct inode *inode, int sync) |
1da177e4 | 66 | { |
1da177e4 LT |
67 | int ret; |
68 | ||
d30c8348 TM |
69 | if (sync) { |
70 | ret = filemap_fdatawait(inode->i_mapping); | |
71 | if (ret == 0) | |
72 | ret = nfs_commit_inode(inode, FLUSH_SYNC); | |
73 | } else | |
74 | ret = nfs_commit_inode(inode, 0); | |
75 | if (ret >= 0) | |
76 | return 0; | |
77 | __mark_inode_dirty(inode, I_DIRTY_DATASYNC); | |
78 | return ret; | |
1da177e4 LT |
79 | } |
80 | ||
f7b422b1 | 81 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 82 | { |
da6d503a TM |
83 | /* |
84 | * The following should never happen... | |
85 | */ | |
86 | BUG_ON(nfs_have_writebacks(inode)); | |
1c3c07e9 | 87 | BUG_ON(!list_empty(&NFS_I(inode)->open_files)); |
ada70d94 | 88 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 89 | nfs_access_zap_cache(inode); |
1da177e4 LT |
90 | } |
91 | ||
29884df0 TM |
92 | /** |
93 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
94 | */ | |
95 | int nfs_sync_mapping(struct address_space *mapping) | |
96 | { | |
97 | int ret; | |
98 | ||
99 | if (mapping->nrpages == 0) | |
100 | return 0; | |
101 | unmap_mapping_range(mapping, 0, 0, 0); | |
28fd1298 | 102 | ret = filemap_write_and_wait(mapping); |
29884df0 TM |
103 | if (ret != 0) |
104 | goto out; | |
105 | ret = nfs_wb_all(mapping->host); | |
106 | out: | |
107 | return ret; | |
108 | } | |
109 | ||
1da177e4 LT |
110 | /* |
111 | * Invalidate the local caches | |
112 | */ | |
b37b03b7 | 113 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
114 | { |
115 | struct nfs_inode *nfsi = NFS_I(inode); | |
116 | int mode = inode->i_mode; | |
117 | ||
91d5b470 CL |
118 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
119 | ||
c7c20973 TM |
120 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
121 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 LT |
122 | |
123 | memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode))); | |
124 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) | |
55296809 | 125 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 126 | else |
55296809 | 127 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; |
b37b03b7 | 128 | } |
dc59250c | 129 | |
b37b03b7 TM |
130 | void nfs_zap_caches(struct inode *inode) |
131 | { | |
132 | spin_lock(&inode->i_lock); | |
133 | nfs_zap_caches_locked(inode); | |
dc59250c | 134 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
135 | } |
136 | ||
cd9ae2b6 TM |
137 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
138 | { | |
139 | if (mapping->nrpages != 0) { | |
140 | spin_lock(&inode->i_lock); | |
141 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA; | |
142 | spin_unlock(&inode->i_lock); | |
143 | } | |
144 | } | |
145 | ||
ada70d94 TM |
146 | static void nfs_zap_acl_cache(struct inode *inode) |
147 | { | |
148 | void (*clear_acl_cache)(struct inode *); | |
149 | ||
150 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
151 | if (clear_acl_cache != NULL) | |
152 | clear_acl_cache(inode); | |
dc59250c | 153 | spin_lock(&inode->i_lock); |
55296809 | 154 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 155 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
156 | } |
157 | ||
c4812998 TM |
158 | void nfs_invalidate_atime(struct inode *inode) |
159 | { | |
160 | spin_lock(&inode->i_lock); | |
161 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME; | |
162 | spin_unlock(&inode->i_lock); | |
163 | } | |
164 | ||
1da177e4 | 165 | /* |
b37b03b7 TM |
166 | * Invalidate, but do not unhash, the inode. |
167 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 168 | */ |
b37b03b7 | 169 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 170 | { |
b37b03b7 TM |
171 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
172 | nfs_zap_caches_locked(inode); | |
1da177e4 LT |
173 | } |
174 | ||
175 | struct nfs_find_desc { | |
176 | struct nfs_fh *fh; | |
177 | struct nfs_fattr *fattr; | |
178 | }; | |
179 | ||
180 | /* | |
181 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
182 | * this, and re-exported directories (also seen in NFSv2) | |
183 | * we are forced to allow 2 different inodes to have the same | |
184 | * i_ino. | |
185 | */ | |
186 | static int | |
187 | nfs_find_actor(struct inode *inode, void *opaque) | |
188 | { | |
189 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
190 | struct nfs_fh *fh = desc->fh; | |
191 | struct nfs_fattr *fattr = desc->fattr; | |
192 | ||
193 | if (NFS_FILEID(inode) != fattr->fileid) | |
194 | return 0; | |
195 | if (nfs_compare_fh(NFS_FH(inode), fh)) | |
196 | return 0; | |
197 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
198 | return 0; | |
199 | return 1; | |
200 | } | |
201 | ||
202 | static int | |
203 | nfs_init_locked(struct inode *inode, void *opaque) | |
204 | { | |
205 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
206 | struct nfs_fattr *fattr = desc->fattr; | |
207 | ||
208 | NFS_FILEID(inode) = fattr->fileid; | |
209 | nfs_copy_fh(NFS_FH(inode), desc->fh); | |
210 | return 0; | |
211 | } | |
212 | ||
213 | /* Don't use READDIRPLUS on directories that we believe are too large */ | |
214 | #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE) | |
215 | ||
216 | /* | |
217 | * This is our front-end to iget that looks up inodes by file handle | |
218 | * instead of inode number. | |
219 | */ | |
220 | struct inode * | |
221 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) | |
222 | { | |
223 | struct nfs_find_desc desc = { | |
224 | .fh = fh, | |
225 | .fattr = fattr | |
226 | }; | |
03f28e3a | 227 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
228 | unsigned long hash; |
229 | ||
230 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
231 | goto out_no_inode; | |
232 | ||
233 | if (!fattr->nlink) { | |
234 | printk("NFS: Buggy server - nlink == 0!\n"); | |
235 | goto out_no_inode; | |
236 | } | |
237 | ||
238 | hash = nfs_fattr_to_ino_t(fattr); | |
239 | ||
03f28e3a TM |
240 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
241 | if (inode == NULL) { | |
242 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 243 | goto out_no_inode; |
03f28e3a | 244 | } |
1da177e4 LT |
245 | |
246 | if (inode->i_state & I_NEW) { | |
247 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 248 | unsigned long now = jiffies; |
1da177e4 LT |
249 | |
250 | /* We set i_ino for the few things that still rely on it, | |
251 | * such as stat(2) */ | |
252 | inode->i_ino = hash; | |
253 | ||
254 | /* We can't support update_atime(), since the server will reset it */ | |
255 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
256 | inode->i_mode = fattr->mode; | |
257 | /* Why so? Because we want revalidate for devices/FIFOs, and | |
258 | * that's precisely what we have in nfs_file_inode_operations. | |
259 | */ | |
8fa5c000 | 260 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 LT |
261 | if (S_ISREG(inode->i_mode)) { |
262 | inode->i_fop = &nfs_file_operations; | |
263 | inode->i_data.a_ops = &nfs_file_aops; | |
264 | inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info; | |
265 | } else if (S_ISDIR(inode->i_mode)) { | |
8fa5c000 | 266 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 LT |
267 | inode->i_fop = &nfs_dir_operations; |
268 | if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS) | |
269 | && fattr->size <= NFS_LIMIT_READDIRPLUS) | |
412d582e | 270 | set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_FLAGS(inode)); |
55a97593 TM |
271 | /* Deal with crossing mountpoints */ |
272 | if (!nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) { | |
6b97fd3d MN |
273 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
274 | inode->i_op = &nfs_referral_inode_operations; | |
275 | else | |
276 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 TM |
277 | inode->i_fop = NULL; |
278 | } | |
1da177e4 LT |
279 | } else if (S_ISLNK(inode->i_mode)) |
280 | inode->i_op = &nfs_symlink_inode_operations; | |
281 | else | |
282 | init_special_inode(inode, inode->i_mode, fattr->rdev); | |
283 | ||
33801147 | 284 | nfsi->read_cache_jiffies = fattr->time_start; |
b0c4fddc TM |
285 | nfsi->last_updated = now; |
286 | nfsi->cache_change_attribute = now; | |
1da177e4 LT |
287 | inode->i_atime = fattr->atime; |
288 | inode->i_mtime = fattr->mtime; | |
289 | inode->i_ctime = fattr->ctime; | |
290 | if (fattr->valid & NFS_ATTR_FATTR_V4) | |
291 | nfsi->change_attr = fattr->change_attr; | |
292 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
293 | inode->i_nlink = fattr->nlink; | |
294 | inode->i_uid = fattr->uid; | |
295 | inode->i_gid = fattr->gid; | |
296 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
297 | /* | |
298 | * report the blocks in 512byte units | |
299 | */ | |
300 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
301 | } else { |
302 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
303 | } |
304 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); | |
b0c4fddc | 305 | nfsi->attrtimeo_timestamp = now; |
1da177e4 | 306 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
1c3c07e9 | 307 | nfsi->access_cache = RB_ROOT; |
1da177e4 LT |
308 | |
309 | unlock_new_inode(inode); | |
310 | } else | |
311 | nfs_refresh_inode(inode, fattr); | |
312 | dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n", | |
313 | inode->i_sb->s_id, | |
314 | (long long)NFS_FILEID(inode), | |
315 | atomic_read(&inode->i_count)); | |
316 | ||
317 | out: | |
318 | return inode; | |
319 | ||
320 | out_no_inode: | |
03f28e3a | 321 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
322 | goto out; |
323 | } | |
324 | ||
325 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET) | |
326 | ||
327 | int | |
328 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
329 | { | |
330 | struct inode *inode = dentry->d_inode; | |
331 | struct nfs_fattr fattr; | |
332 | int error; | |
333 | ||
91d5b470 CL |
334 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
335 | ||
1da177e4 LT |
336 | if (attr->ia_valid & ATTR_SIZE) { |
337 | if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode)) | |
338 | attr->ia_valid &= ~ATTR_SIZE; | |
339 | } | |
340 | ||
341 | /* Optimization: if the end result is no change, don't RPC */ | |
342 | attr->ia_valid &= NFS_VALID_ATTRS; | |
343 | if (attr->ia_valid == 0) | |
344 | return 0; | |
345 | ||
346 | lock_kernel(); | |
755c1e20 | 347 | /* Write all dirty data */ |
e1552e19 TM |
348 | if (S_ISREG(inode->i_mode)) { |
349 | filemap_write_and_wait(inode->i_mapping); | |
350 | nfs_wb_all(inode); | |
351 | } | |
642ac549 TM |
352 | /* |
353 | * Return any delegations if we're going to change ACLs | |
354 | */ | |
355 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
356 | nfs_inode_return_delegation(inode); | |
1da177e4 | 357 | error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr); |
65e4308d | 358 | if (error == 0) |
1da177e4 | 359 | nfs_refresh_inode(inode, &fattr); |
65e4308d TM |
360 | unlock_kernel(); |
361 | return error; | |
362 | } | |
363 | ||
364 | /** | |
365 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
366 | * @inode: pointer to struct inode | |
367 | * @attr: pointer to struct iattr | |
368 | * | |
369 | * Note: we do this in the *proc.c in order to ensure that | |
370 | * it works for things like exclusive creates too. | |
371 | */ | |
372 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr) | |
373 | { | |
374 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { | |
1da177e4 | 375 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
376 | int mode = attr->ia_mode & S_IALLUGO; |
377 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
378 | inode->i_mode = mode; |
379 | } | |
380 | if ((attr->ia_valid & ATTR_UID) != 0) | |
381 | inode->i_uid = attr->ia_uid; | |
382 | if ((attr->ia_valid & ATTR_GID) != 0) | |
383 | inode->i_gid = attr->ia_gid; | |
dc59250c | 384 | spin_lock(&inode->i_lock); |
55296809 | 385 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
dc59250c | 386 | spin_unlock(&inode->i_lock); |
65e4308d TM |
387 | } |
388 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 389 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
65e4308d TM |
390 | inode->i_size = attr->ia_size; |
391 | vmtruncate(inode, attr->ia_size); | |
392 | } | |
1da177e4 LT |
393 | } |
394 | ||
412d582e CL |
395 | static int nfs_wait_schedule(void *word) |
396 | { | |
397 | if (signal_pending(current)) | |
398 | return -ERESTARTSYS; | |
399 | schedule(); | |
400 | return 0; | |
401 | } | |
402 | ||
1da177e4 LT |
403 | /* |
404 | * Wait for the inode to get unlocked. | |
1da177e4 | 405 | */ |
412d582e | 406 | static int nfs_wait_on_inode(struct inode *inode) |
1da177e4 LT |
407 | { |
408 | struct rpc_clnt *clnt = NFS_CLIENT(inode); | |
409 | struct nfs_inode *nfsi = NFS_I(inode); | |
412d582e | 410 | sigset_t oldmask; |
1da177e4 | 411 | int error; |
412d582e | 412 | |
412d582e CL |
413 | rpc_clnt_sigmask(clnt, &oldmask); |
414 | error = wait_on_bit_lock(&nfsi->flags, NFS_INO_REVALIDATING, | |
415 | nfs_wait_schedule, TASK_INTERRUPTIBLE); | |
416 | rpc_clnt_sigunmask(clnt, &oldmask); | |
412d582e | 417 | |
1da177e4 LT |
418 | return error; |
419 | } | |
420 | ||
412d582e CL |
421 | static void nfs_wake_up_inode(struct inode *inode) |
422 | { | |
423 | struct nfs_inode *nfsi = NFS_I(inode); | |
424 | ||
425 | clear_bit(NFS_INO_REVALIDATING, &nfsi->flags); | |
426 | smp_mb__after_clear_bit(); | |
427 | wake_up_bit(&nfsi->flags, NFS_INO_REVALIDATING); | |
428 | } | |
429 | ||
1da177e4 LT |
430 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
431 | { | |
432 | struct inode *inode = dentry->d_inode; | |
55296809 | 433 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
1da177e4 LT |
434 | int err; |
435 | ||
70b9ecbd | 436 | /* Flush out writes to the server in order to update c/mtime */ |
63470738 | 437 | if (S_ISREG(inode->i_mode)) |
ed90ef51 | 438 | nfs_wb_nocommit(inode); |
fc33a7bb CH |
439 | |
440 | /* | |
441 | * We may force a getattr if the user cares about atime. | |
442 | * | |
443 | * Note that we only have to check the vfsmount flags here: | |
444 | * - NFS always sets S_NOATIME by so checking it would give a | |
445 | * bogus result | |
446 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
447 | * no point in checking those. | |
448 | */ | |
449 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
450 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 451 | need_atime = 0; |
fc33a7bb | 452 | |
1da177e4 LT |
453 | if (need_atime) |
454 | err = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
455 | else | |
456 | err = nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
4e769b93 | 457 | if (!err) { |
1da177e4 | 458 | generic_fillattr(inode, stat); |
4e769b93 PS |
459 | stat->ino = NFS_FILEID(inode); |
460 | } | |
1da177e4 LT |
461 | return err; |
462 | } | |
463 | ||
b92dccf6 | 464 | static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred) |
1da177e4 LT |
465 | { |
466 | struct nfs_open_context *ctx; | |
467 | ||
f52720ca | 468 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
1da177e4 | 469 | if (ctx != NULL) { |
88be9f99 TM |
470 | ctx->path.dentry = dget(dentry); |
471 | ctx->path.mnt = mntget(mnt); | |
1da177e4 LT |
472 | ctx->cred = get_rpccred(cred); |
473 | ctx->state = NULL; | |
474 | ctx->lockowner = current->files; | |
475 | ctx->error = 0; | |
00a92642 | 476 | ctx->dir_cookie = 0; |
5e11934d | 477 | atomic_set(&ctx->count, 1); |
1da177e4 LT |
478 | } |
479 | return ctx; | |
480 | } | |
481 | ||
482 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
483 | { | |
484 | if (ctx != NULL) | |
5e11934d | 485 | atomic_inc(&ctx->count); |
1da177e4 LT |
486 | return ctx; |
487 | } | |
488 | ||
5e11934d | 489 | void put_nfs_open_context(struct nfs_open_context *ctx) |
1da177e4 | 490 | { |
5e11934d | 491 | struct inode *inode = ctx->path.dentry->d_inode; |
3bec63db | 492 | |
5e11934d TM |
493 | if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock)) |
494 | return; | |
495 | list_del(&ctx->list); | |
496 | spin_unlock(&inode->i_lock); | |
3bec63db TM |
497 | if (ctx->state != NULL) |
498 | nfs4_close_state(&ctx->path, ctx->state, ctx->mode); | |
499 | if (ctx->cred != NULL) | |
500 | put_rpccred(ctx->cred); | |
501 | dput(ctx->path.dentry); | |
502 | mntput(ctx->path.mnt); | |
503 | kfree(ctx); | |
504 | } | |
505 | ||
1da177e4 LT |
506 | /* |
507 | * Ensure that mmap has a recent RPC credential for use when writing out | |
508 | * shared pages | |
509 | */ | |
b92dccf6 | 510 | static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) |
1da177e4 | 511 | { |
01cce933 | 512 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
513 | struct nfs_inode *nfsi = NFS_I(inode); |
514 | ||
515 | filp->private_data = get_nfs_open_context(ctx); | |
516 | spin_lock(&inode->i_lock); | |
517 | list_add(&ctx->list, &nfsi->open_files); | |
518 | spin_unlock(&inode->i_lock); | |
519 | } | |
520 | ||
d530838b TM |
521 | /* |
522 | * Given an inode, search for an open context with the desired characteristics | |
523 | */ | |
524 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, int mode) | |
1da177e4 LT |
525 | { |
526 | struct nfs_inode *nfsi = NFS_I(inode); | |
527 | struct nfs_open_context *pos, *ctx = NULL; | |
528 | ||
529 | spin_lock(&inode->i_lock); | |
530 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
531 | if (cred != NULL && pos->cred != cred) |
532 | continue; | |
1da177e4 LT |
533 | if ((pos->mode & mode) == mode) { |
534 | ctx = get_nfs_open_context(pos); | |
535 | break; | |
536 | } | |
537 | } | |
538 | spin_unlock(&inode->i_lock); | |
539 | return ctx; | |
540 | } | |
541 | ||
b92dccf6 | 542 | static void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 543 | { |
01cce933 | 544 | struct inode *inode = filp->f_path.dentry->d_inode; |
cd3758e3 | 545 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
546 | |
547 | if (ctx) { | |
548 | filp->private_data = NULL; | |
549 | spin_lock(&inode->i_lock); | |
550 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
551 | spin_unlock(&inode->i_lock); | |
552 | put_nfs_open_context(ctx); | |
553 | } | |
554 | } | |
555 | ||
556 | /* | |
557 | * These allocate and release file read/write context information. | |
558 | */ | |
559 | int nfs_open(struct inode *inode, struct file *filp) | |
560 | { | |
561 | struct nfs_open_context *ctx; | |
562 | struct rpc_cred *cred; | |
563 | ||
564 | cred = rpcauth_lookupcred(NFS_CLIENT(inode)->cl_auth, 0); | |
565 | if (IS_ERR(cred)) | |
566 | return PTR_ERR(cred); | |
01cce933 | 567 | ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred); |
1da177e4 LT |
568 | put_rpccred(cred); |
569 | if (ctx == NULL) | |
570 | return -ENOMEM; | |
571 | ctx->mode = filp->f_mode; | |
572 | nfs_file_set_open_context(filp, ctx); | |
573 | put_nfs_open_context(ctx); | |
1da177e4 LT |
574 | return 0; |
575 | } | |
576 | ||
577 | int nfs_release(struct inode *inode, struct file *filp) | |
578 | { | |
1da177e4 LT |
579 | nfs_file_clear_open_context(filp); |
580 | return 0; | |
581 | } | |
582 | ||
583 | /* | |
584 | * This function is called whenever some part of NFS notices that | |
585 | * the cached attributes have to be refreshed. | |
586 | */ | |
587 | int | |
588 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
589 | { | |
590 | int status = -ESTALE; | |
591 | struct nfs_fattr fattr; | |
592 | struct nfs_inode *nfsi = NFS_I(inode); | |
1da177e4 LT |
593 | |
594 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n", | |
595 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
596 | ||
1842bfb4 | 597 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
1da177e4 | 598 | lock_kernel(); |
85233a7a | 599 | if (is_bad_inode(inode)) |
1da177e4 LT |
600 | goto out_nowait; |
601 | if (NFS_STALE(inode)) | |
602 | goto out_nowait; | |
603 | ||
412d582e CL |
604 | status = nfs_wait_on_inode(inode); |
605 | if (status < 0) | |
606 | goto out; | |
7fdc49c4 TM |
607 | |
608 | status = -ESTALE; | |
609 | if (NFS_STALE(inode)) | |
610 | goto out; | |
1da177e4 | 611 | |
1da177e4 LT |
612 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr); |
613 | if (status != 0) { | |
614 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n", | |
615 | inode->i_sb->s_id, | |
616 | (long long)NFS_FILEID(inode), status); | |
617 | if (status == -ESTALE) { | |
618 | nfs_zap_caches(inode); | |
619 | if (!S_ISDIR(inode->i_mode)) | |
412d582e | 620 | set_bit(NFS_INO_STALE, &NFS_FLAGS(inode)); |
1da177e4 LT |
621 | } |
622 | goto out; | |
623 | } | |
624 | ||
33801147 | 625 | spin_lock(&inode->i_lock); |
24aa1fe6 | 626 | status = nfs_update_inode(inode, &fattr); |
1da177e4 | 627 | if (status) { |
33801147 | 628 | spin_unlock(&inode->i_lock); |
1da177e4 LT |
629 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n", |
630 | inode->i_sb->s_id, | |
631 | (long long)NFS_FILEID(inode), status); | |
632 | goto out; | |
633 | } | |
dc59250c | 634 | spin_unlock(&inode->i_lock); |
55296809 | 635 | |
24aa1fe6 | 636 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 637 | nfs_zap_acl_cache(inode); |
55296809 | 638 | |
1da177e4 LT |
639 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n", |
640 | inode->i_sb->s_id, | |
641 | (long long)NFS_FILEID(inode)); | |
642 | ||
412d582e CL |
643 | out: |
644 | nfs_wake_up_inode(inode); | |
645 | ||
1da177e4 LT |
646 | out_nowait: |
647 | unlock_kernel(); | |
648 | return status; | |
649 | } | |
650 | ||
651 | int nfs_attribute_timeout(struct inode *inode) | |
652 | { | |
653 | struct nfs_inode *nfsi = NFS_I(inode); | |
654 | ||
655 | if (nfs_have_delegation(inode, FMODE_READ)) | |
656 | return 0; | |
c7e15961 | 657 | return !time_in_range(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1da177e4 LT |
658 | } |
659 | ||
660 | /** | |
661 | * nfs_revalidate_inode - Revalidate the inode attributes | |
662 | * @server - pointer to nfs_server struct | |
663 | * @inode - pointer to inode struct | |
664 | * | |
665 | * Updates inode attribute information by retrieving the data from the server. | |
666 | */ | |
667 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
668 | { | |
44b11874 | 669 | if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) |
1da177e4 LT |
670 | && !nfs_attribute_timeout(inode)) |
671 | return NFS_STALE(inode) ? -ESTALE : 0; | |
672 | return __nfs_revalidate_inode(server, inode); | |
673 | } | |
674 | ||
717d44e8 TM |
675 | static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
676 | { | |
677 | struct nfs_inode *nfsi = NFS_I(inode); | |
678 | ||
679 | if (mapping->nrpages != 0) { | |
680 | int ret = invalidate_inode_pages2(mapping); | |
681 | if (ret < 0) | |
682 | return ret; | |
683 | } | |
684 | spin_lock(&inode->i_lock); | |
685 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; | |
2f78e431 | 686 | if (S_ISDIR(inode->i_mode)) |
717d44e8 | 687 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
717d44e8 TM |
688 | spin_unlock(&inode->i_lock); |
689 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); | |
690 | dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n", | |
691 | inode->i_sb->s_id, (long long)NFS_FILEID(inode)); | |
692 | return 0; | |
693 | } | |
694 | ||
695 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) | |
696 | { | |
697 | int ret = 0; | |
698 | ||
699 | mutex_lock(&inode->i_mutex); | |
700 | if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) { | |
701 | ret = nfs_sync_mapping(mapping); | |
702 | if (ret == 0) | |
703 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
704 | } | |
705 | mutex_unlock(&inode->i_mutex); | |
706 | return ret; | |
707 | } | |
708 | ||
7d52e862 | 709 | /** |
717d44e8 | 710 | * nfs_revalidate_mapping_nolock - Revalidate the pagecache |
7d52e862 TM |
711 | * @inode - pointer to host inode |
712 | * @mapping - pointer to mapping | |
713 | */ | |
717d44e8 | 714 | int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping) |
7d52e862 TM |
715 | { |
716 | struct nfs_inode *nfsi = NFS_I(inode); | |
44b11874 TM |
717 | int ret = 0; |
718 | ||
44b11874 | 719 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
717d44e8 | 720 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { |
44b11874 | 721 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
717d44e8 TM |
722 | if (ret < 0) |
723 | goto out; | |
724 | } | |
725 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
726 | ret = nfs_invalidate_mapping_nolock(inode, mapping); | |
727 | out: | |
728 | return ret; | |
729 | } | |
7d52e862 | 730 | |
717d44e8 TM |
731 | /** |
732 | * nfs_revalidate_mapping - Revalidate the pagecache | |
733 | * @inode - pointer to host inode | |
734 | * @mapping - pointer to mapping | |
735 | * | |
736 | * This version of the function will take the inode->i_mutex and attempt to | |
737 | * flush out all dirty data if it needs to invalidate the page cache. | |
738 | */ | |
739 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
740 | { | |
741 | struct nfs_inode *nfsi = NFS_I(inode); | |
742 | int ret = 0; | |
dc59250c | 743 | |
717d44e8 TM |
744 | if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE) |
745 | || nfs_attribute_timeout(inode) || NFS_STALE(inode)) { | |
746 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
747 | if (ret < 0) | |
748 | goto out; | |
7d52e862 | 749 | } |
717d44e8 TM |
750 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) |
751 | ret = nfs_invalidate_mapping(inode, mapping); | |
cd9ae2b6 | 752 | out: |
44b11874 | 753 | return ret; |
7d52e862 TM |
754 | } |
755 | ||
a895b4a1 TM |
756 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
757 | { | |
758 | struct nfs_inode *nfsi = NFS_I(inode); | |
759 | ||
70ca8852 TM |
760 | if ((fattr->valid & NFS_ATTR_WCC_V4) != 0 && |
761 | nfsi->change_attr == fattr->pre_change_attr) { | |
762 | nfsi->change_attr = fattr->change_attr; | |
763 | if (S_ISDIR(inode->i_mode)) | |
764 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
765 | } | |
a895b4a1 TM |
766 | /* If we have atomic WCC data, we may update some attributes */ |
767 | if ((fattr->valid & NFS_ATTR_WCC) != 0) { | |
17cadc95 | 768 | if (timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) |
a895b4a1 | 769 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
a895b4a1 TM |
770 | if (timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { |
771 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); | |
e323ea46 TM |
772 | if (S_ISDIR(inode->i_mode)) |
773 | nfsi->cache_validity |= NFS_INO_INVALID_DATA; | |
a895b4a1 | 774 | } |
17cadc95 | 775 | if (inode->i_size == fattr->pre_size && nfsi->npages == 0) |
a895b4a1 | 776 | inode->i_size = fattr->size; |
a895b4a1 TM |
777 | } |
778 | } | |
779 | ||
1da177e4 | 780 | /** |
33801147 | 781 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
782 | * @inode - pointer to inode |
783 | * @fattr - updated attributes | |
784 | * | |
785 | * Verifies the attribute cache. If we have just changed the attributes, | |
786 | * so that fattr carries weak cache consistency data, then it may | |
787 | * also update the ctime/mtime/change_attribute. | |
788 | */ | |
33801147 | 789 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
790 | { |
791 | struct nfs_inode *nfsi = NFS_I(inode); | |
792 | loff_t cur_size, new_isize; | |
1da177e4 | 793 | |
dc59250c | 794 | |
ca62b9c3 TM |
795 | /* Has the inode gone and changed behind our back? */ |
796 | if (nfsi->fileid != fattr->fileid | |
797 | || (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { | |
798 | return -EIO; | |
799 | } | |
800 | ||
a895b4a1 TM |
801 | /* Do atomic weak cache consistency updates */ |
802 | nfs_wcc_update_inode(inode, fattr); | |
1da177e4 | 803 | |
9d1e9232 | 804 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && |
f1bb0b92 TM |
805 | nfsi->change_attr != fattr->change_attr) |
806 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 807 | |
1da177e4 | 808 | /* Verify a few of the more important attributes */ |
f1bb0b92 TM |
809 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) |
810 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
ca62b9c3 TM |
811 | |
812 | cur_size = i_size_read(inode); | |
813 | new_isize = nfs_size_to_loff_t(fattr->size); | |
fb374d24 TM |
814 | if (cur_size != new_isize && nfsi->npages == 0) |
815 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1da177e4 LT |
816 | |
817 | /* Have any file permissions changed? */ | |
818 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) | |
819 | || inode->i_uid != fattr->uid | |
820 | || inode->i_gid != fattr->gid) | |
55296809 | 821 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
822 | |
823 | /* Has the link count changed? */ | |
824 | if (inode->i_nlink != fattr->nlink) | |
55296809 | 825 | nfsi->cache_validity |= NFS_INO_INVALID_ATTR; |
1da177e4 LT |
826 | |
827 | if (!timespec_equal(&inode->i_atime, &fattr->atime)) | |
55296809 | 828 | nfsi->cache_validity |= NFS_INO_INVALID_ATIME; |
1da177e4 | 829 | |
33801147 | 830 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
831 | return 0; |
832 | } | |
833 | ||
33801147 TM |
834 | /** |
835 | * nfs_refresh_inode - try to update the inode attribute cache | |
836 | * @inode - pointer to inode | |
837 | * @fattr - updated attributes | |
838 | * | |
839 | * Check that an RPC call that returned attributes has not overlapped with | |
840 | * other recent updates of the inode metadata, then decide whether it is | |
841 | * safe to do a full update of the inode attributes, or whether just to | |
842 | * call nfs_check_inode_attributes. | |
843 | */ | |
844 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
845 | { | |
846 | struct nfs_inode *nfsi = NFS_I(inode); | |
847 | int status; | |
848 | ||
849 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
850 | return 0; | |
851 | spin_lock(&inode->i_lock); | |
33801147 | 852 | if (time_after(fattr->time_start, nfsi->last_updated)) |
24aa1fe6 | 853 | status = nfs_update_inode(inode, fattr); |
33801147 TM |
854 | else |
855 | status = nfs_check_inode_attributes(inode, fattr); | |
856 | ||
857 | spin_unlock(&inode->i_lock); | |
858 | return status; | |
859 | } | |
860 | ||
decf491f TM |
861 | /** |
862 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
863 | * @inode - pointer to inode | |
864 | * @fattr - updated attributes | |
865 | * | |
866 | * After an operation that has changed the inode metadata, mark the | |
867 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
868 | * |
869 | * NB: if the server didn't return any post op attributes, this | |
870 | * function will force the retrieval of attributes before the next | |
871 | * NFS request. Thus it should be used only for operations that | |
872 | * are expected to change one or more attributes, to avoid | |
873 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
874 | */ |
875 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
876 | { | |
877 | struct nfs_inode *nfsi = NFS_I(inode); | |
decf491f | 878 | |
7668fdbe TM |
879 | if (fattr->valid & NFS_ATTR_FATTR) |
880 | return nfs_refresh_inode(inode, fattr); | |
881 | ||
882 | spin_lock(&inode->i_lock); | |
883 | nfsi->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
884 | spin_unlock(&inode->i_lock); | |
885 | return 0; | |
decf491f TM |
886 | } |
887 | ||
70ca8852 TM |
888 | /** |
889 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
890 | * @inode - pointer to inode | |
891 | * @fattr - updated attributes | |
892 | * | |
893 | * After an operation that has changed the inode metadata, mark the | |
894 | * attribute cache as being invalid, then try to update it. Fake up | |
895 | * weak cache consistency data, if none exist. | |
896 | * | |
897 | * This function is mainly designed to be used by the ->write_done() functions. | |
898 | */ | |
899 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
900 | { | |
901 | if ((fattr->valid & NFS_ATTR_FATTR_V4) != 0 && | |
902 | (fattr->valid & NFS_ATTR_WCC_V4) == 0) { | |
903 | fattr->pre_change_attr = NFS_I(inode)->change_attr; | |
904 | fattr->valid |= NFS_ATTR_WCC_V4; | |
905 | } | |
906 | if ((fattr->valid & NFS_ATTR_FATTR) != 0 && | |
907 | (fattr->valid & NFS_ATTR_WCC) == 0) { | |
908 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); | |
909 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); | |
910 | fattr->pre_size = inode->i_size; | |
911 | fattr->valid |= NFS_ATTR_WCC; | |
912 | } | |
913 | return nfs_post_op_update_inode(inode, fattr); | |
914 | } | |
915 | ||
1da177e4 LT |
916 | /* |
917 | * Many nfs protocol calls return the new file attributes after | |
918 | * an operation. Here we update the inode to reflect the state | |
919 | * of the server's inode. | |
920 | * | |
921 | * This is a bit tricky because we have to make sure all dirty pages | |
922 | * have been sent off to the server before calling invalidate_inode_pages. | |
923 | * To make sure no other process adds more write requests while we try | |
924 | * our best to flush them, we make them sleep during the attribute refresh. | |
925 | * | |
926 | * A very similar scenario holds for the dir cache. | |
927 | */ | |
24aa1fe6 | 928 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 929 | { |
8b4bdcf8 | 930 | struct nfs_server *server; |
1da177e4 | 931 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 932 | loff_t cur_isize, new_isize; |
1da177e4 | 933 | unsigned int invalid = 0; |
3e7d950a | 934 | unsigned long now = jiffies; |
1da177e4 LT |
935 | |
936 | dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n", | |
937 | __FUNCTION__, inode->i_sb->s_id, inode->i_ino, | |
938 | atomic_read(&inode->i_count), fattr->valid); | |
939 | ||
325cfed9 CL |
940 | if (nfsi->fileid != fattr->fileid) |
941 | goto out_fileid; | |
1da177e4 LT |
942 | |
943 | /* | |
944 | * Make sure the inode's type hasn't changed. | |
945 | */ | |
33801147 | 946 | if ((inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) |
1da177e4 LT |
947 | goto out_changed; |
948 | ||
8b4bdcf8 | 949 | server = NFS_SERVER(inode); |
a0356862 TM |
950 | /* Update the fsid? */ |
951 | if (S_ISDIR(inode->i_mode) | |
8b4bdcf8 TM |
952 | && !nfs_fsid_equal(&server->fsid, &fattr->fsid)) |
953 | server->fsid = fattr->fsid; | |
954 | ||
1da177e4 LT |
955 | /* |
956 | * Update the read time so we don't revalidate too often. | |
957 | */ | |
33801147 | 958 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 959 | |
f2115dc9 TM |
960 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ATIME |
961 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 962 | |
a895b4a1 TM |
963 | /* Do atomic weak cache consistency updates */ |
964 | nfs_wcc_update_inode(inode, fattr); | |
965 | ||
47aabaa7 TM |
966 | /* More cache consistency checks */ |
967 | if (!(fattr->valid & NFS_ATTR_FATTR_V4)) { | |
968 | /* NFSv2/v3: Check if the mtime agrees */ | |
969 | if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) { | |
970 | dprintk("NFS: mtime change on server for file %s/%ld\n", | |
971 | inode->i_sb->s_id, inode->i_ino); | |
972 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
973 | nfsi->cache_change_attribute = now; | |
974 | } | |
975 | /* If ctime has changed we should definitely clear access+acl caches */ | |
12b373eb | 976 | if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) |
47aabaa7 | 977 | invalid |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
47aabaa7 TM |
978 | } else if (nfsi->change_attr != fattr->change_attr) { |
979 | dprintk("NFS: change_attr change on server for file %s/%ld\n", | |
980 | inode->i_sb->s_id, inode->i_ino); | |
981 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; | |
982 | nfsi->cache_change_attribute = now; | |
983 | } | |
984 | ||
951a143b | 985 | /* Check if our cached file size is stale */ |
1da177e4 LT |
986 | new_isize = nfs_size_to_loff_t(fattr->size); |
987 | cur_isize = i_size_read(inode); | |
951a143b | 988 | if (new_isize != cur_isize) { |
b64e8a5e TM |
989 | /* Do we perhaps have any outstanding writes, or has |
990 | * the file grown beyond our last write? */ | |
991 | if (nfsi->npages == 0 || new_isize > cur_isize) { | |
1da177e4 LT |
992 | inode->i_size = new_isize; |
993 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
994 | } | |
951a143b TM |
995 | dprintk("NFS: isize change on server for file %s/%ld\n", |
996 | inode->i_sb->s_id, inode->i_ino); | |
1da177e4 LT |
997 | } |
998 | ||
1da177e4 | 999 | |
47aabaa7 TM |
1000 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1001 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1da177e4 | 1002 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); |
47aabaa7 | 1003 | nfsi->change_attr = fattr->change_attr; |
1da177e4 LT |
1004 | |
1005 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO) || | |
1006 | inode->i_uid != fattr->uid || | |
1007 | inode->i_gid != fattr->gid) | |
ada70d94 | 1008 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1da177e4 LT |
1009 | |
1010 | inode->i_mode = fattr->mode; | |
1011 | inode->i_nlink = fattr->nlink; | |
1012 | inode->i_uid = fattr->uid; | |
1013 | inode->i_gid = fattr->gid; | |
1014 | ||
1015 | if (fattr->valid & (NFS_ATTR_FATTR_V3 | NFS_ATTR_FATTR_V4)) { | |
1016 | /* | |
1017 | * report the blocks in 512byte units | |
1018 | */ | |
1019 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 LT |
1020 | } else { |
1021 | inode->i_blocks = fattr->du.nfs2.blocks; | |
1da177e4 LT |
1022 | } |
1023 | ||
1024 | /* Update attrtimeo value if we're out of the unstable period */ | |
1025 | if (invalid & NFS_INO_INVALID_ATTR) { | |
91d5b470 | 1026 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1027 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1028 | nfsi->attrtimeo_timestamp = now; |
6d2b2966 TM |
1029 | nfsi->last_updated = now; |
1030 | } else { | |
1031 | if (!time_in_range(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
1032 | if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode)) | |
1033 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1034 | nfsi->attrtimeo_timestamp = now; | |
1035 | } | |
1036 | /* | |
1037 | * Avoid jiffy wraparound issues with nfsi->last_updated | |
1038 | */ | |
1039 | if (!time_in_range(nfsi->last_updated, nfsi->read_cache_jiffies, now)) | |
1040 | nfsi->last_updated = nfsi->read_cache_jiffies; | |
1da177e4 | 1041 | } |
f2115dc9 | 1042 | invalid &= ~NFS_INO_INVALID_ATTR; |
1da177e4 LT |
1043 | /* Don't invalidate the data if we were to blame */ |
1044 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1045 | || S_ISLNK(inode->i_mode))) | |
1046 | invalid &= ~NFS_INO_INVALID_DATA; | |
412c77ce TM |
1047 | if (!nfs_have_delegation(inode, FMODE_READ) || |
1048 | (nfsi->cache_validity & NFS_INO_REVAL_FORCED)) | |
55296809 | 1049 | nfsi->cache_validity |= invalid; |
412c77ce | 1050 | nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED; |
1da177e4 LT |
1051 | |
1052 | return 0; | |
1053 | out_changed: | |
1054 | /* | |
1055 | * Big trouble! The inode has become a different object. | |
1056 | */ | |
1da177e4 LT |
1057 | printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n", |
1058 | __FUNCTION__, inode->i_ino, inode->i_mode, fattr->mode); | |
b37b03b7 | 1059 | out_err: |
1da177e4 LT |
1060 | /* |
1061 | * No need to worry about unhashing the dentry, as the | |
1062 | * lookup validation will know that the inode is bad. | |
1063 | * (But we fall through to invalidate the caches.) | |
1064 | */ | |
1065 | nfs_invalidate_inode(inode); | |
1da177e4 | 1066 | return -ESTALE; |
325cfed9 CL |
1067 | |
1068 | out_fileid: | |
1069 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" | |
1070 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
54ceac45 | 1071 | NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id, |
325cfed9 CL |
1072 | (long long)nfsi->fileid, (long long)fattr->fileid); |
1073 | goto out_err; | |
1da177e4 LT |
1074 | } |
1075 | ||
55a97593 | 1076 | |
1da177e4 LT |
1077 | #ifdef CONFIG_NFS_V4 |
1078 | ||
1da177e4 LT |
1079 | /* |
1080 | * Clean out any remaining NFSv4 state that might be left over due | |
1081 | * to open() calls that passed nfs_atomic_lookup, but failed to call | |
1082 | * nfs_open(). | |
1083 | */ | |
f7b422b1 | 1084 | void nfs4_clear_inode(struct inode *inode) |
1da177e4 | 1085 | { |
1da177e4 | 1086 | /* If we are holding a delegation, return it! */ |
cae7a073 | 1087 | nfs_inode_return_delegation(inode); |
1da177e4 LT |
1088 | /* First call standard NFS clear_inode() code */ |
1089 | nfs_clear_inode(inode); | |
1da177e4 | 1090 | } |
1da177e4 LT |
1091 | #endif |
1092 | ||
f7b422b1 | 1093 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1094 | { |
1095 | struct nfs_inode *nfsi; | |
e94b1766 | 1096 | nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1097 | if (!nfsi) |
1098 | return NULL; | |
55296809 CL |
1099 | nfsi->flags = 0UL; |
1100 | nfsi->cache_validity = 0UL; | |
458818ed TM |
1101 | #ifdef CONFIG_NFS_V3_ACL |
1102 | nfsi->acl_access = ERR_PTR(-EAGAIN); | |
1103 | nfsi->acl_default = ERR_PTR(-EAGAIN); | |
1104 | #endif | |
e50a1c2e BF |
1105 | #ifdef CONFIG_NFS_V4 |
1106 | nfsi->nfs4_acl = NULL; | |
1107 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1108 | return &nfsi->vfs_inode; |
1109 | } | |
1110 | ||
f7b422b1 | 1111 | void nfs_destroy_inode(struct inode *inode) |
1da177e4 LT |
1112 | { |
1113 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
1114 | } | |
1115 | ||
d75d5414 AM |
1116 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1117 | { | |
1118 | #ifdef CONFIG_NFS_V4 | |
1119 | INIT_LIST_HEAD(&nfsi->open_states); | |
1120 | nfsi->delegation = NULL; | |
1121 | nfsi->delegation_state = 0; | |
1122 | init_rwsem(&nfsi->rwsem); | |
1123 | #endif | |
1124 | } | |
f7b422b1 | 1125 | |
e18b890b | 1126 | static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags) |
1da177e4 LT |
1127 | { |
1128 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1129 | ||
a35afb83 | 1130 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1131 | INIT_LIST_HEAD(&nfsi->open_files); |
1132 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1133 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
1134 | INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC); | |
a35afb83 CL |
1135 | nfsi->ncommit = 0; |
1136 | nfsi->npages = 0; | |
1137 | nfs4_init_once(nfsi); | |
1da177e4 | 1138 | } |
20c2df83 | 1139 | |
f7b422b1 | 1140 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1141 | { |
1142 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1143 | sizeof(struct nfs_inode), | |
fffb60f9 PJ |
1144 | 0, (SLAB_RECLAIM_ACCOUNT| |
1145 | SLAB_MEM_SPREAD), | |
20c2df83 | 1146 | init_once); |
1da177e4 LT |
1147 | if (nfs_inode_cachep == NULL) |
1148 | return -ENOMEM; | |
1149 | ||
1150 | return 0; | |
1151 | } | |
1152 | ||
266bee88 | 1153 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1154 | { |
1a1d92c1 | 1155 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1156 | } |
1157 | ||
1158 | /* | |
1159 | * Initialize NFS | |
1160 | */ | |
1161 | static int __init init_nfs_fs(void) | |
1162 | { | |
1163 | int err; | |
1164 | ||
6aaca566 DH |
1165 | err = nfs_fs_proc_init(); |
1166 | if (err) | |
1167 | goto out5; | |
1168 | ||
1da177e4 LT |
1169 | err = nfs_init_nfspagecache(); |
1170 | if (err) | |
1171 | goto out4; | |
1172 | ||
1173 | err = nfs_init_inodecache(); | |
1174 | if (err) | |
1175 | goto out3; | |
1176 | ||
1177 | err = nfs_init_readpagecache(); | |
1178 | if (err) | |
1179 | goto out2; | |
1180 | ||
1181 | err = nfs_init_writepagecache(); | |
1182 | if (err) | |
1183 | goto out1; | |
1184 | ||
1da177e4 LT |
1185 | err = nfs_init_directcache(); |
1186 | if (err) | |
1187 | goto out0; | |
1da177e4 LT |
1188 | |
1189 | #ifdef CONFIG_PROC_FS | |
1190 | rpc_proc_register(&nfs_rpcstat); | |
1191 | #endif | |
f7b422b1 | 1192 | if ((err = register_nfs_fs()) != 0) |
1da177e4 LT |
1193 | goto out; |
1194 | return 0; | |
1195 | out: | |
1196 | #ifdef CONFIG_PROC_FS | |
1197 | rpc_proc_unregister("nfs"); | |
1198 | #endif | |
1da177e4 | 1199 | nfs_destroy_directcache(); |
6b59a754 | 1200 | out0: |
6b59a754 | 1201 | nfs_destroy_writepagecache(); |
1da177e4 LT |
1202 | out1: |
1203 | nfs_destroy_readpagecache(); | |
1204 | out2: | |
1205 | nfs_destroy_inodecache(); | |
1206 | out3: | |
1207 | nfs_destroy_nfspagecache(); | |
1208 | out4: | |
6aaca566 DH |
1209 | nfs_fs_proc_exit(); |
1210 | out5: | |
1da177e4 LT |
1211 | return err; |
1212 | } | |
1213 | ||
1214 | static void __exit exit_nfs_fs(void) | |
1215 | { | |
1da177e4 | 1216 | nfs_destroy_directcache(); |
1da177e4 LT |
1217 | nfs_destroy_writepagecache(); |
1218 | nfs_destroy_readpagecache(); | |
1219 | nfs_destroy_inodecache(); | |
1220 | nfs_destroy_nfspagecache(); | |
1221 | #ifdef CONFIG_PROC_FS | |
1222 | rpc_proc_unregister("nfs"); | |
1223 | #endif | |
f7b422b1 | 1224 | unregister_nfs_fs(); |
6aaca566 | 1225 | nfs_fs_proc_exit(); |
1da177e4 LT |
1226 | } |
1227 | ||
1228 | /* Not quite true; I just maintain it */ | |
1229 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
1230 | MODULE_LICENSE("GPL"); | |
1231 | ||
1232 | module_init(init_nfs_fs) | |
1233 | module_exit(exit_nfs_fs) |