Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/fs/nfs/inode.c | |
3 | * | |
4 | * Copyright (C) 1992 Rick Sladkey | |
5 | * | |
6 | * nfs inode and superblock handling functions | |
7 | * | |
526719ba | 8 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
9 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
10 | * | |
11 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
12 | * J.S.Peatfield@damtp.cam.ac.uk | |
13 | * | |
14 | */ | |
15 | ||
1da177e4 LT |
16 | #include <linux/module.h> |
17 | #include <linux/init.h> | |
e8edc6e0 | 18 | #include <linux/sched.h> |
1da177e4 LT |
19 | #include <linux/time.h> |
20 | #include <linux/kernel.h> | |
21 | #include <linux/mm.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/stat.h> | |
24 | #include <linux/errno.h> | |
25 | #include <linux/unistd.h> | |
26 | #include <linux/sunrpc/clnt.h> | |
27 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 28 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
29 | #include <linux/nfs_fs.h> |
30 | #include <linux/nfs_mount.h> | |
31 | #include <linux/nfs4_mount.h> | |
32 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
33 | #include <linux/seq_file.h> |
34 | #include <linux/mount.h> | |
1da177e4 | 35 | #include <linux/vfs.h> |
9cdb3883 MN |
36 | #include <linux/inet.h> |
37 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
3fa0b4e2 | 39 | #include <linux/compat.h> |
d310310c | 40 | #include <linux/freezer.h> |
1da177e4 | 41 | |
1da177e4 LT |
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" |
8ec442ae | 49 | #include "fscache.h" |
e5e94017 | 50 | #include "pnfs.h" |
ab7017a3 | 51 | #include "nfs.h" |
1b340d01 | 52 | #include "netns.h" |
1da177e4 | 53 | |
f4ce1299 TM |
54 | #include "nfstrace.h" |
55 | ||
1da177e4 | 56 | #define NFSDBG_FACILITY NFSDBG_VFS |
1da177e4 | 57 | |
f43bf0be TM |
58 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
59 | ||
60 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 61 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 62 | |
1da177e4 | 63 | static void nfs_invalidate_inode(struct inode *); |
24aa1fe6 | 64 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 65 | |
e18b890b | 66 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 67 | |
1da177e4 LT |
68 | static inline unsigned long |
69 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
70 | { | |
71 | return nfs_fileid_to_ino_t(fattr->fileid); | |
72 | } | |
73 | ||
210c7c17 | 74 | static int nfs_wait_killable(int mode) |
72cb77f4 | 75 | { |
416ad3c9 | 76 | freezable_schedule_unsafe(); |
dfd01f02 PZ |
77 | if (signal_pending_state(mode, current)) |
78 | return -ERESTARTSYS; | |
72cb77f4 TM |
79 | return 0; |
80 | } | |
210c7c17 BC |
81 | |
82 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) | |
83 | { | |
84 | return nfs_wait_killable(mode); | |
85 | } | |
89d77c8f | 86 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 87 | |
210c7c17 BC |
88 | int nfs_wait_atomic_killable(atomic_t *p) |
89 | { | |
90 | return nfs_wait_killable(TASK_KILLABLE); | |
91 | } | |
92 | ||
f43bf0be TM |
93 | /** |
94 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
95 | * @fileid: 64-bit fileid | |
96 | * | |
97 | * This function returns a 32-bit inode number if the boot parameter | |
98 | * nfs.enable_ino64 is zero. | |
99 | */ | |
100 | u64 nfs_compat_user_ino64(u64 fileid) | |
101 | { | |
3fa0b4e2 FF |
102 | #ifdef CONFIG_COMPAT |
103 | compat_ulong_t ino; | |
104 | #else | |
105 | unsigned long ino; | |
106 | #endif | |
f43bf0be TM |
107 | |
108 | if (enable_ino64) | |
109 | return fileid; | |
110 | ino = fileid; | |
111 | if (sizeof(ino) < sizeof(fileid)) | |
112 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
113 | return ino; | |
114 | } | |
115 | ||
eed99357 TM |
116 | int nfs_drop_inode(struct inode *inode) |
117 | { | |
118 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
119 | } | |
120 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
121 | ||
19d87ca3 | 122 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 123 | { |
da6d503a TM |
124 | /* |
125 | * The following should never happen... | |
126 | */ | |
f48407dd TM |
127 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
128 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 129 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 130 | nfs_access_zap_cache(inode); |
f1fe29b4 | 131 | nfs_fscache_clear_inode(inode); |
1da177e4 | 132 | } |
89d77c8f | 133 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 134 | |
b57922d9 AV |
135 | void nfs_evict_inode(struct inode *inode) |
136 | { | |
91b0abe3 | 137 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 138 | clear_inode(inode); |
b57922d9 AV |
139 | nfs_clear_inode(inode); |
140 | } | |
141 | ||
9e1681c2 | 142 | int nfs_sync_inode(struct inode *inode) |
4d346bea | 143 | { |
95d9f6c3 | 144 | inode_dio_wait(inode); |
4d346bea TM |
145 | return nfs_wb_all(inode); |
146 | } | |
9e1681c2 | 147 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
4d346bea | 148 | |
29884df0 TM |
149 | /** |
150 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
151 | */ | |
152 | int nfs_sync_mapping(struct address_space *mapping) | |
153 | { | |
5cf95214 | 154 | int ret = 0; |
29884df0 | 155 | |
5cf95214 TM |
156 | if (mapping->nrpages != 0) { |
157 | unmap_mapping_range(mapping, 0, 0, 0); | |
158 | ret = nfs_wb_all(mapping->host); | |
159 | } | |
29884df0 TM |
160 | return ret; |
161 | } | |
162 | ||
6edf9609 TM |
163 | static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
164 | { | |
165 | struct nfs_inode *nfsi = NFS_I(inode); | |
166 | ||
167 | if (inode->i_mapping->nrpages == 0) | |
168 | flags &= ~NFS_INO_INVALID_DATA; | |
169 | nfsi->cache_validity |= flags; | |
170 | if (flags & NFS_INO_INVALID_DATA) | |
171 | nfs_fscache_invalidate(inode); | |
172 | } | |
173 | ||
1da177e4 LT |
174 | /* |
175 | * Invalidate the local caches | |
176 | */ | |
b37b03b7 | 177 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
178 | { |
179 | struct nfs_inode *nfsi = NFS_I(inode); | |
180 | int mode = inode->i_mode; | |
181 | ||
91d5b470 CL |
182 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
183 | ||
c7c20973 TM |
184 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
185 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 186 | |
c3f52af3 | 187 | memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); |
de242c0b | 188 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { |
6edf9609 | 189 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
190 | | NFS_INO_INVALID_DATA |
191 | | NFS_INO_INVALID_ACCESS | |
192 | | NFS_INO_INVALID_ACL | |
6edf9609 | 193 | | NFS_INO_REVAL_PAGECACHE); |
aa9c2669 | 194 | } else |
6edf9609 | 195 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
aa9c2669 DQ |
196 | | NFS_INO_INVALID_ACCESS |
197 | | NFS_INO_INVALID_ACL | |
6edf9609 | 198 | | NFS_INO_REVAL_PAGECACHE); |
fd1defc2 | 199 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 200 | } |
dc59250c | 201 | |
b37b03b7 TM |
202 | void nfs_zap_caches(struct inode *inode) |
203 | { | |
204 | spin_lock(&inode->i_lock); | |
205 | nfs_zap_caches_locked(inode); | |
dc59250c | 206 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
207 | } |
208 | ||
cd9ae2b6 TM |
209 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
210 | { | |
211 | if (mapping->nrpages != 0) { | |
212 | spin_lock(&inode->i_lock); | |
6edf9609 | 213 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
214 | spin_unlock(&inode->i_lock); |
215 | } | |
216 | } | |
217 | ||
f41f7418 | 218 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
219 | { |
220 | void (*clear_acl_cache)(struct inode *); | |
221 | ||
222 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
223 | if (clear_acl_cache != NULL) | |
224 | clear_acl_cache(inode); | |
dc59250c | 225 | spin_lock(&inode->i_lock); |
55296809 | 226 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 227 | spin_unlock(&inode->i_lock); |
1da177e4 | 228 | } |
1c606fb7 | 229 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 230 | |
c4812998 TM |
231 | void nfs_invalidate_atime(struct inode *inode) |
232 | { | |
233 | spin_lock(&inode->i_lock); | |
6edf9609 | 234 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
235 | spin_unlock(&inode->i_lock); |
236 | } | |
ddda8e0a | 237 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 238 | |
1da177e4 | 239 | /* |
b37b03b7 TM |
240 | * Invalidate, but do not unhash, the inode. |
241 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 242 | */ |
b37b03b7 | 243 | static void nfs_invalidate_inode(struct inode *inode) |
1da177e4 | 244 | { |
3a10c30a | 245 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 246 | nfs_zap_caches_locked(inode); |
1da177e4 LT |
247 | } |
248 | ||
249 | struct nfs_find_desc { | |
250 | struct nfs_fh *fh; | |
251 | struct nfs_fattr *fattr; | |
252 | }; | |
253 | ||
254 | /* | |
255 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
256 | * this, and re-exported directories (also seen in NFSv2) | |
257 | * we are forced to allow 2 different inodes to have the same | |
258 | * i_ino. | |
259 | */ | |
260 | static int | |
261 | nfs_find_actor(struct inode *inode, void *opaque) | |
262 | { | |
263 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
264 | struct nfs_fh *fh = desc->fh; | |
265 | struct nfs_fattr *fattr = desc->fattr; | |
266 | ||
267 | if (NFS_FILEID(inode) != fattr->fileid) | |
268 | return 0; | |
f6488c9b JL |
269 | if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode)) |
270 | return 0; | |
1da177e4 LT |
271 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
272 | return 0; | |
273 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
274 | return 0; | |
275 | return 1; | |
276 | } | |
277 | ||
278 | static int | |
279 | nfs_init_locked(struct inode *inode, void *opaque) | |
280 | { | |
281 | struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque; | |
282 | struct nfs_fattr *fattr = desc->fattr; | |
283 | ||
99fadcd7 | 284 | set_nfs_fileid(inode, fattr->fileid); |
916ec34d | 285 | inode->i_mode = fattr->mode; |
1da177e4 LT |
286 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
287 | return 0; | |
288 | } | |
289 | ||
e058f70b | 290 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
291 | static void nfs_clear_label_invalid(struct inode *inode) |
292 | { | |
293 | spin_lock(&inode->i_lock); | |
294 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
295 | spin_unlock(&inode->i_lock); | |
296 | } | |
297 | ||
aa9c2669 DQ |
298 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
299 | struct nfs4_label *label) | |
300 | { | |
301 | int error; | |
302 | ||
303 | if (label == NULL) | |
304 | return; | |
305 | ||
aa9c2669 DQ |
306 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
307 | error = security_inode_notifysecctx(inode, label->label, | |
308 | label->len); | |
309 | if (error) | |
310 | printk(KERN_ERR "%s() %s %d " | |
311 | "security_inode_notifysecctx() %d\n", | |
312 | __func__, | |
313 | (char *)label->label, | |
314 | label->len, error); | |
fd1defc2 | 315 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
316 | } |
317 | } | |
318 | ||
e058f70b SD |
319 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
320 | { | |
321 | struct nfs4_label *label = NULL; | |
322 | int minor_version = server->nfs_client->cl_minorversion; | |
323 | ||
324 | if (minor_version < 2) | |
325 | return label; | |
326 | ||
327 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
328 | return label; | |
329 | ||
330 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
331 | if (label == NULL) | |
332 | return ERR_PTR(-ENOMEM); | |
333 | ||
334 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
335 | if (label->label == NULL) { | |
336 | kfree(label); | |
337 | return ERR_PTR(-ENOMEM); | |
338 | } | |
339 | label->len = NFS4_MAXLABELLEN; | |
340 | ||
341 | return label; | |
342 | } | |
343 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 344 | #else |
829e57d7 | 345 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, |
aa9c2669 DQ |
346 | struct nfs4_label *label) |
347 | { | |
348 | } | |
e058f70b | 349 | #endif |
aa9c2669 | 350 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 351 | |
1da177e4 LT |
352 | /* |
353 | * This is our front-end to iget that looks up inodes by file handle | |
354 | * instead of inode number. | |
355 | */ | |
356 | struct inode * | |
1775fd3e | 357 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label) |
1da177e4 LT |
358 | { |
359 | struct nfs_find_desc desc = { | |
360 | .fh = fh, | |
361 | .fattr = fattr | |
362 | }; | |
03f28e3a | 363 | struct inode *inode = ERR_PTR(-ENOENT); |
1da177e4 LT |
364 | unsigned long hash; |
365 | ||
7ebb9315 BS |
366 | nfs_attr_check_mountpoint(sb, fattr); |
367 | ||
2ef47eb1 AS |
368 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
369 | fattr->fileid = fattr->mounted_on_fileid; | |
370 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 371 | goto out_no_inode; |
9e6e70f8 | 372 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 373 | goto out_no_inode; |
1da177e4 LT |
374 | |
375 | hash = nfs_fattr_to_ino_t(fattr); | |
376 | ||
03f28e3a TM |
377 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
378 | if (inode == NULL) { | |
379 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 380 | goto out_no_inode; |
03f28e3a | 381 | } |
1da177e4 LT |
382 | |
383 | if (inode->i_state & I_NEW) { | |
384 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 385 | unsigned long now = jiffies; |
1da177e4 LT |
386 | |
387 | /* We set i_ino for the few things that still rely on it, | |
388 | * such as stat(2) */ | |
389 | inode->i_ino = hash; | |
390 | ||
391 | /* We can't support update_atime(), since the server will reset it */ | |
392 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
393 | inode->i_mode = fattr->mode; | |
62ab460c TM |
394 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
395 | && nfs_server_capable(inode, NFS_CAP_MODE)) | |
6edf9609 | 396 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
1da177e4 LT |
397 | /* Why so? Because we want revalidate for devices/FIFOs, and |
398 | * that's precisely what we have in nfs_file_inode_operations. | |
399 | */ | |
8fa5c000 | 400 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 401 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 402 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 403 | inode->i_data.a_ops = &nfs_file_aops; |
1da177e4 | 404 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 405 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 406 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 407 | inode->i_data.a_ops = &nfs_dir_aops; |
55a97593 | 408 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
409 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
410 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
411 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
412 | inode->i_op = &nfs_referral_inode_operations; | |
413 | else | |
414 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 415 | inode->i_fop = NULL; |
36d43a43 | 416 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 417 | } |
21fc61c7 | 418 | } else if (S_ISLNK(inode->i_mode)) { |
1da177e4 | 419 | inode->i_op = &nfs_symlink_inode_operations; |
21fc61c7 AV |
420 | inode_nohighmem(inode); |
421 | } else | |
1da177e4 LT |
422 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
423 | ||
9e6e70f8 TM |
424 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
425 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
426 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
a9a4a87a | 427 | inode->i_version = 0; |
9e6e70f8 | 428 | inode->i_size = 0; |
6d6b77f1 | 429 | clear_nlink(inode); |
9ff593c4 EB |
430 | inode->i_uid = make_kuid(&init_user_ns, -2); |
431 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 TM |
432 | inode->i_blocks = 0; |
433 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
2701d086 AA |
434 | nfsi->write_io = 0; |
435 | nfsi->read_io = 0; | |
9e6e70f8 | 436 | |
33801147 | 437 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 438 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 TM |
439 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
440 | inode->i_atime = fattr->atime; | |
62ab460c | 441 | else if (nfs_server_capable(inode, NFS_CAP_ATIME)) |
6edf9609 | 442 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
443 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
444 | inode->i_mtime = fattr->mtime; | |
62ab460c | 445 | else if (nfs_server_capable(inode, NFS_CAP_MTIME)) |
6edf9609 | 446 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
447 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
448 | inode->i_ctime = fattr->ctime; | |
62ab460c | 449 | else if (nfs_server_capable(inode, NFS_CAP_CTIME)) |
6edf9609 | 450 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 | 451 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
a9a4a87a | 452 | inode->i_version = fattr->change_attr; |
cd812599 | 453 | else |
5c675d64 TM |
454 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
455 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 TM |
456 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
457 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 458 | else |
6edf9609 TM |
459 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
460 | | NFS_INO_REVAL_PAGECACHE); | |
9e6e70f8 | 461 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 462 | set_nlink(inode, fattr->nlink); |
62ab460c | 463 | else if (nfs_server_capable(inode, NFS_CAP_NLINK)) |
6edf9609 | 464 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
465 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
466 | inode->i_uid = fattr->uid; | |
62ab460c | 467 | else if (nfs_server_capable(inode, NFS_CAP_OWNER)) |
6edf9609 | 468 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
469 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
470 | inode->i_gid = fattr->gid; | |
62ab460c | 471 | else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP)) |
6edf9609 | 472 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR); |
9e6e70f8 TM |
473 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
474 | inode->i_blocks = fattr->du.nfs2.blocks; | |
475 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { | |
1da177e4 LT |
476 | /* |
477 | * report the blocks in 512byte units | |
478 | */ | |
479 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
1da177e4 | 480 | } |
aa9c2669 DQ |
481 | |
482 | nfs_setsecurity(inode, fattr, label); | |
483 | ||
1da177e4 | 484 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 485 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 486 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 487 | |
f1fe29b4 | 488 | nfs_fscache_init_inode(inode); |
ef79c097 | 489 | |
1da177e4 LT |
490 | unlock_new_inode(inode); |
491 | } else | |
492 | nfs_refresh_inode(inode, fattr); | |
1e8968c5 | 493 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 494 | inode->i_sb->s_id, |
1e8968c5 | 495 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 496 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
497 | atomic_read(&inode->i_count)); |
498 | ||
499 | out: | |
500 | return inode; | |
501 | ||
502 | out_no_inode: | |
03f28e3a | 503 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
504 | goto out; |
505 | } | |
89d77c8f | 506 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 507 | |
536e43d1 | 508 | #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN) |
1da177e4 LT |
509 | |
510 | int | |
511 | nfs_setattr(struct dentry *dentry, struct iattr *attr) | |
512 | { | |
2b0143b5 | 513 | struct inode *inode = d_inode(dentry); |
987f8dfc | 514 | struct nfs_fattr *fattr; |
ae57ca0f | 515 | int error = 0; |
1da177e4 | 516 | |
91d5b470 CL |
517 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
518 | ||
188b95dd JL |
519 | /* skip mode change if it's just for clearing setuid/setgid */ |
520 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
521 | attr->ia_valid &= ~ATTR_MODE; | |
522 | ||
1da177e4 | 523 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
524 | BUG_ON(!S_ISREG(inode->i_mode)); |
525 | ||
ae57ca0f KM |
526 | error = inode_newsize_ok(inode, attr->ia_size); |
527 | if (error) | |
528 | return error; | |
529 | ||
530 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
531 | attr->ia_valid &= ~ATTR_SIZE; |
532 | } | |
533 | ||
534 | /* Optimization: if the end result is no change, don't RPC */ | |
535 | attr->ia_valid &= NFS_VALID_ATTRS; | |
536e43d1 | 536 | if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
537 | return 0; |
538 | ||
f4ce1299 TM |
539 | trace_nfs_setattr_enter(inode); |
540 | ||
755c1e20 | 541 | /* Write all dirty data */ |
4d346bea TM |
542 | if (S_ISREG(inode->i_mode)) |
543 | nfs_sync_inode(inode); | |
987f8dfc TM |
544 | |
545 | fattr = nfs_alloc_fattr(); | |
ae57ca0f KM |
546 | if (fattr == NULL) { |
547 | error = -ENOMEM; | |
987f8dfc | 548 | goto out; |
ae57ca0f KM |
549 | } |
550 | ||
642ac549 TM |
551 | /* |
552 | * Return any delegations if we're going to change ACLs | |
553 | */ | |
554 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) | |
57ec14c5 | 555 | NFS_PROTO(inode)->return_delegation(inode); |
987f8dfc | 556 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 557 | if (error == 0) |
aa9c2669 | 558 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
559 | nfs_free_fattr(fattr); |
560 | out: | |
f4ce1299 | 561 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
562 | return error; |
563 | } | |
ddda8e0a | 564 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 565 | |
a3d01454 TM |
566 | /** |
567 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
568 | * @inode: inode of the file used | |
569 | * @offset: file offset to start truncating | |
570 | * | |
571 | * This is a copy of the common vmtruncate, but with the locking | |
572 | * corrected to take into account the fact that NFS requires | |
573 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 574 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
575 | */ |
576 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
577 | { | |
c08d3b0e | 578 | int err; |
a3d01454 | 579 | |
c08d3b0e | 580 | err = inode_newsize_ok(inode, offset); |
581 | if (err) | |
582 | goto out; | |
a3d01454 | 583 | |
c08d3b0e | 584 | i_size_write(inode, offset); |
6edf9609 TM |
585 | /* Optimisation */ |
586 | if (offset == 0) | |
587 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA; | |
c08d3b0e | 588 | |
f044636d | 589 | spin_unlock(&inode->i_lock); |
7caef267 | 590 | truncate_pagecache(inode, offset); |
f044636d | 591 | spin_lock(&inode->i_lock); |
c08d3b0e | 592 | out: |
593 | return err; | |
a3d01454 TM |
594 | } |
595 | ||
65e4308d TM |
596 | /** |
597 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
598 | * @inode: pointer to struct inode | |
599 | * @attr: pointer to struct iattr | |
600 | * | |
601 | * Note: we do this in the *proc.c in order to ensure that | |
602 | * it works for things like exclusive creates too. | |
603 | */ | |
f044636d TM |
604 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
605 | struct nfs_fattr *fattr) | |
65e4308d | 606 | { |
f044636d TM |
607 | /* Barrier: bump the attribute generation count. */ |
608 | nfs_fattr_set_barrier(fattr); | |
609 | ||
610 | spin_lock(&inode->i_lock); | |
611 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
65e4308d | 612 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
1da177e4 | 613 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
614 | int mode = attr->ia_mode & S_IALLUGO; |
615 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
616 | inode->i_mode = mode; |
617 | } | |
618 | if ((attr->ia_valid & ATTR_UID) != 0) | |
619 | inode->i_uid = attr->ia_uid; | |
620 | if ((attr->ia_valid & ATTR_GID) != 0) | |
621 | inode->i_gid = attr->ia_gid; | |
6edf9609 TM |
622 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
623 | | NFS_INO_INVALID_ACL); | |
65e4308d TM |
624 | } |
625 | if ((attr->ia_valid & ATTR_SIZE) != 0) { | |
91d5b470 | 626 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
a3d01454 | 627 | nfs_vmtruncate(inode, attr->ia_size); |
65e4308d | 628 | } |
616c3196 JL |
629 | if (fattr->valid) |
630 | nfs_update_inode(inode, fattr); | |
631 | else | |
632 | NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR; | |
f044636d | 633 | spin_unlock(&inode->i_lock); |
1da177e4 | 634 | } |
ddda8e0a | 635 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 636 | |
311324ad TM |
637 | static void nfs_request_parent_use_readdirplus(struct dentry *dentry) |
638 | { | |
639 | struct dentry *parent; | |
640 | ||
641 | parent = dget_parent(dentry); | |
2b0143b5 | 642 | nfs_force_use_readdirplus(d_inode(parent)); |
311324ad TM |
643 | dput(parent); |
644 | } | |
645 | ||
646 | static bool nfs_need_revalidate_inode(struct inode *inode) | |
647 | { | |
648 | if (NFS_I(inode)->cache_validity & | |
649 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
650 | return true; | |
651 | if (nfs_attribute_cache_expired(inode)) | |
652 | return true; | |
653 | return false; | |
654 | } | |
655 | ||
1da177e4 LT |
656 | int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) |
657 | { | |
2b0143b5 | 658 | struct inode *inode = d_inode(dentry); |
55296809 | 659 | int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME; |
16caf5b6 | 660 | int err = 0; |
1da177e4 | 661 | |
f4ce1299 | 662 | trace_nfs_getattr_enter(inode); |
acdc53b2 | 663 | /* Flush out writes to the server in order to update c/mtime. */ |
28c494c5 | 664 | if (S_ISREG(inode->i_mode)) { |
5955102c | 665 | inode_lock(inode); |
4d346bea | 666 | err = nfs_sync_inode(inode); |
5955102c | 667 | inode_unlock(inode); |
acdc53b2 TM |
668 | if (err) |
669 | goto out; | |
28c494c5 | 670 | } |
fc33a7bb CH |
671 | |
672 | /* | |
673 | * We may force a getattr if the user cares about atime. | |
674 | * | |
675 | * Note that we only have to check the vfsmount flags here: | |
676 | * - NFS always sets S_NOATIME by so checking it would give a | |
677 | * bogus result | |
678 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
679 | * no point in checking those. | |
680 | */ | |
681 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
682 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 683 | need_atime = 0; |
fc33a7bb | 684 | |
311324ad TM |
685 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
686 | struct nfs_server *server = NFS_SERVER(inode); | |
687 | ||
688 | if (server->caps & NFS_CAP_READDIRPLUS) | |
689 | nfs_request_parent_use_readdirplus(dentry); | |
690 | err = __nfs_revalidate_inode(server, inode); | |
691 | } | |
4e769b93 | 692 | if (!err) { |
1da177e4 | 693 | generic_fillattr(inode, stat); |
f43bf0be | 694 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
7ef5ca4f N |
695 | if (S_ISDIR(inode->i_mode)) |
696 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
4e769b93 | 697 | } |
acdc53b2 | 698 | out: |
f4ce1299 | 699 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
700 | return err; |
701 | } | |
ddda8e0a | 702 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 703 | |
f11ac8db TM |
704 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
705 | { | |
706 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
707 | l_ctx->lockowner.l_owner = current->files; |
708 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 709 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 710 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
711 | } |
712 | ||
713 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
714 | { | |
8c86899f TM |
715 | struct nfs_lock_context *head = &ctx->lock_context; |
716 | struct nfs_lock_context *pos = head; | |
f11ac8db | 717 | |
8c86899f | 718 | do { |
2a369153 | 719 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 720 | continue; |
2a369153 | 721 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
722 | continue; |
723 | atomic_inc(&pos->count); | |
724 | return pos; | |
8c86899f | 725 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
726 | return NULL; |
727 | } | |
728 | ||
729 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
730 | { | |
731 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 732 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
733 | |
734 | spin_lock(&inode->i_lock); | |
735 | res = __nfs_find_lock_context(ctx); | |
736 | if (res == NULL) { | |
737 | spin_unlock(&inode->i_lock); | |
738 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
739 | if (new == NULL) | |
b3c54de6 | 740 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
741 | nfs_init_lock_context(new); |
742 | spin_lock(&inode->i_lock); | |
743 | res = __nfs_find_lock_context(ctx); | |
744 | if (res == NULL) { | |
745 | list_add_tail(&new->list, &ctx->lock_context.list); | |
746 | new->open_context = ctx; | |
747 | res = new; | |
748 | new = NULL; | |
749 | } | |
750 | } | |
751 | spin_unlock(&inode->i_lock); | |
752 | kfree(new); | |
753 | return res; | |
754 | } | |
1c6dcbe5 | 755 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
756 | |
757 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
758 | { | |
759 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 760 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
761 | |
762 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
763 | return; | |
764 | list_del(&l_ctx->list); | |
765 | spin_unlock(&inode->i_lock); | |
766 | kfree(l_ctx); | |
767 | } | |
1c6dcbe5 | 768 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 769 | |
7fe5c398 TM |
770 | /** |
771 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
772 | * @ctx: pointer to context | |
773 | * @is_sync: is this a synchronous close | |
774 | * | |
5cf9d706 TM |
775 | * Ensure that the attributes are up to date if we're mounted |
776 | * with close-to-open semantics and we have cached data that will | |
777 | * need to be revalidated on open. | |
7fe5c398 TM |
778 | */ |
779 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
780 | { | |
5cf9d706 | 781 | struct nfs_inode *nfsi; |
7fe5c398 TM |
782 | struct inode *inode; |
783 | struct nfs_server *server; | |
784 | ||
785 | if (!(ctx->mode & FMODE_WRITE)) | |
786 | return; | |
787 | if (!is_sync) | |
788 | return; | |
2b0143b5 | 789 | inode = d_inode(ctx->dentry); |
5cf9d706 TM |
790 | nfsi = NFS_I(inode); |
791 | if (inode->i_mapping->nrpages == 0) | |
792 | return; | |
793 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
794 | return; | |
795 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
796 | return; |
797 | server = NFS_SERVER(inode); | |
798 | if (server->flags & NFS_MOUNT_NOCTO) | |
799 | return; | |
800 | nfs_revalidate_inode(server, inode); | |
801 | } | |
ddda8e0a | 802 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 803 | |
5ede7b1c | 804 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
805 | { |
806 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
807 | struct rpc_cred *cred = rpc_lookup_cred(); |
808 | if (IS_ERR(cred)) | |
809 | return ERR_CAST(cred); | |
1da177e4 | 810 | |
f52720ca | 811 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
812 | if (!ctx) { |
813 | put_rpccred(cred); | |
814 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 815 | } |
5ede7b1c AV |
816 | nfs_sb_active(dentry->d_sb); |
817 | ctx->dentry = dget(dentry); | |
818 | ctx->cred = cred; | |
819 | ctx->state = NULL; | |
820 | ctx->mode = f_mode; | |
821 | ctx->flags = 0; | |
822 | ctx->error = 0; | |
823 | nfs_init_lock_context(&ctx->lock_context); | |
824 | ctx->lock_context.open_context = ctx; | |
825 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 826 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
827 | return ctx; |
828 | } | |
89d77c8f | 829 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
830 | |
831 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
832 | { | |
833 | if (ctx != NULL) | |
f11ac8db | 834 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
835 | return ctx; |
836 | } | |
89d77c8f | 837 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 838 | |
7fe5c398 | 839 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 840 | { |
2b0143b5 | 841 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 842 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 843 | |
5c78f58e | 844 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
845 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
846 | return; | |
847 | list_del(&ctx->list); | |
848 | spin_unlock(&inode->i_lock); | |
ef84303e | 849 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 850 | return; |
5c78f58e TM |
851 | if (inode != NULL) |
852 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
853 | if (ctx->cred != NULL) |
854 | put_rpccred(ctx->cred); | |
3d4ff43d | 855 | dput(ctx->dentry); |
322b2b90 | 856 | nfs_sb_deactive(sb); |
82be417a | 857 | kfree(ctx->mdsthreshold); |
3bec63db TM |
858 | kfree(ctx); |
859 | } | |
860 | ||
a49c3c77 TM |
861 | void put_nfs_open_context(struct nfs_open_context *ctx) |
862 | { | |
863 | __put_nfs_open_context(ctx, 0); | |
864 | } | |
89d77c8f | 865 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 866 | |
4eae5014 TM |
867 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
868 | { | |
869 | __put_nfs_open_context(ctx, 1); | |
870 | } | |
871 | ||
1da177e4 LT |
872 | /* |
873 | * Ensure that mmap has a recent RPC credential for use when writing out | |
874 | * shared pages | |
875 | */ | |
c45ffdd2 | 876 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 877 | { |
2b0143b5 | 878 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
879 | struct nfs_inode *nfsi = NFS_I(inode); |
880 | ||
1da177e4 LT |
881 | spin_lock(&inode->i_lock); |
882 | list_add(&ctx->list, &nfsi->open_files); | |
883 | spin_unlock(&inode->i_lock); | |
884 | } | |
c45ffdd2 TM |
885 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
886 | ||
887 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
888 | { | |
889 | filp->private_data = get_nfs_open_context(ctx); | |
890 | if (list_empty(&ctx->list)) | |
891 | nfs_inode_attach_open_context(ctx); | |
892 | } | |
89d77c8f | 893 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 894 | |
d530838b TM |
895 | /* |
896 | * Given an inode, search for an open context with the desired characteristics | |
897 | */ | |
dc0b027d | 898 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
899 | { |
900 | struct nfs_inode *nfsi = NFS_I(inode); | |
901 | struct nfs_open_context *pos, *ctx = NULL; | |
902 | ||
903 | spin_lock(&inode->i_lock); | |
904 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
905 | if (cred != NULL && pos->cred != cred) |
906 | continue; | |
1544fa0f TM |
907 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
908 | continue; | |
909 | ctx = get_nfs_open_context(pos); | |
910 | break; | |
1da177e4 LT |
911 | } |
912 | spin_unlock(&inode->i_lock); | |
913 | return ctx; | |
914 | } | |
915 | ||
aff8d8dc | 916 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 917 | { |
cd3758e3 | 918 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
919 | |
920 | if (ctx) { | |
2b0143b5 | 921 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 922 | |
0bcbf039 PT |
923 | /* |
924 | * We fatal error on write before. Try to writeback | |
925 | * every page again. | |
926 | */ | |
927 | if (ctx->error < 0) | |
928 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 LT |
929 | filp->private_data = NULL; |
930 | spin_lock(&inode->i_lock); | |
931 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
932 | spin_unlock(&inode->i_lock); | |
4eae5014 | 933 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
934 | } |
935 | } | |
936 | ||
937 | /* | |
938 | * These allocate and release file read/write context information. | |
939 | */ | |
940 | int nfs_open(struct inode *inode, struct file *filp) | |
941 | { | |
942 | struct nfs_open_context *ctx; | |
1da177e4 | 943 | |
be62a1a8 | 944 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode); |
5ede7b1c AV |
945 | if (IS_ERR(ctx)) |
946 | return PTR_ERR(ctx); | |
1da177e4 LT |
947 | nfs_file_set_open_context(filp, ctx); |
948 | put_nfs_open_context(ctx); | |
f1fe29b4 | 949 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
950 | return 0; |
951 | } | |
952 | ||
1da177e4 LT |
953 | /* |
954 | * This function is called whenever some part of NFS notices that | |
955 | * the cached attributes have to be refreshed. | |
956 | */ | |
957 | int | |
958 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
959 | { | |
960 | int status = -ESTALE; | |
1775fd3e | 961 | struct nfs4_label *label = NULL; |
a3cba2aa | 962 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 963 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 964 | |
1e8968c5 NV |
965 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
966 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 967 | |
f4ce1299 TM |
968 | trace_nfs_revalidate_inode_enter(inode); |
969 | ||
85233a7a | 970 | if (is_bad_inode(inode)) |
691beb13 | 971 | goto out; |
1da177e4 | 972 | if (NFS_STALE(inode)) |
412d582e | 973 | goto out; |
7fdc49c4 | 974 | |
a3cba2aa TM |
975 | status = -ENOMEM; |
976 | fattr = nfs_alloc_fattr(); | |
977 | if (fattr == NULL) | |
978 | goto out; | |
979 | ||
691beb13 | 980 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
981 | |
982 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
983 | if (IS_ERR(label)) { | |
984 | status = PTR_ERR(label); | |
985 | goto out; | |
986 | } | |
987 | ||
1775fd3e | 988 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 989 | if (status != 0) { |
1e8968c5 | 990 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 991 | inode->i_sb->s_id, |
1e8968c5 | 992 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
993 | if (status == -ESTALE) { |
994 | nfs_zap_caches(inode); | |
995 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 996 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 997 | } |
14c43f76 | 998 | goto err_out; |
1da177e4 LT |
999 | } |
1000 | ||
a3cba2aa | 1001 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1002 | if (status) { |
1e8968c5 | 1003 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1004 | inode->i_sb->s_id, |
1e8968c5 | 1005 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1006 | goto err_out; |
1da177e4 | 1007 | } |
55296809 | 1008 | |
24aa1fe6 | 1009 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1010 | nfs_zap_acl_cache(inode); |
55296809 | 1011 | |
3da580aa JL |
1012 | nfs_setsecurity(inode, fattr, label); |
1013 | ||
1e8968c5 | 1014 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1015 | inode->i_sb->s_id, |
1e8968c5 | 1016 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1017 | |
14c43f76 DQ |
1018 | err_out: |
1019 | nfs4_label_free(label); | |
1020 | out: | |
a3cba2aa | 1021 | nfs_free_fattr(fattr); |
f4ce1299 | 1022 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1023 | return status; |
1024 | } | |
1025 | ||
1026 | int nfs_attribute_timeout(struct inode *inode) | |
1027 | { | |
1028 | struct nfs_inode *nfsi = NFS_I(inode); | |
1029 | ||
d7cf8dd0 TM |
1030 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1031 | } | |
1032 | ||
43f291cd | 1033 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1034 | { |
b4d2314b | 1035 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1036 | return 0; |
d7cf8dd0 | 1037 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1038 | } |
1039 | ||
1040 | /** | |
1041 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1042 | * @server - pointer to nfs_server struct | |
1043 | * @inode - pointer to inode struct | |
1044 | * | |
1045 | * Updates inode attribute information by retrieving the data from the server. | |
1046 | */ | |
1047 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1048 | { | |
311324ad | 1049 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1050 | return NFS_STALE(inode) ? -ESTALE : 0; |
1051 | return __nfs_revalidate_inode(server, inode); | |
1052 | } | |
1c606fb7 | 1053 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1054 | |
912a108d N |
1055 | int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode) |
1056 | { | |
1057 | if (!(NFS_I(inode)->cache_validity & | |
1058 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
1059 | && !nfs_attribute_cache_expired(inode)) | |
1060 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1061 | return -ECHILD; | |
1062 | } | |
1063 | ||
1cda707d | 1064 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1065 | { |
1066 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1067 | int ret; |
1068 | ||
717d44e8 | 1069 | if (mapping->nrpages != 0) { |
f8806c84 | 1070 | if (S_ISREG(inode->i_mode)) { |
ef070dcb | 1071 | unmap_mapping_range(mapping, 0, 0, 0); |
f8806c84 TM |
1072 | ret = nfs_sync_mapping(mapping); |
1073 | if (ret < 0) | |
1074 | return ret; | |
1075 | } | |
1076 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1077 | if (ret < 0) |
1078 | return ret; | |
1079 | } | |
d529ef83 JL |
1080 | if (S_ISDIR(inode->i_mode)) { |
1081 | spin_lock(&inode->i_lock); | |
717d44e8 | 1082 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1083 | spin_unlock(&inode->i_lock); |
1084 | } | |
717d44e8 | 1085 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1086 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1087 | |
1e8968c5 NV |
1088 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1089 | inode->i_sb->s_id, | |
1090 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1091 | return 0; |
1092 | } | |
1093 | ||
b4b1eadf TM |
1094 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1095 | { | |
1096 | if (nfs_have_delegated_attributes(inode)) | |
1097 | return false; | |
1098 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1099 | || nfs_attribute_timeout(inode) | |
1100 | || NFS_STALE(inode); | |
1101 | } | |
1102 | ||
0d0def49 AV |
1103 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
1104 | { | |
1105 | struct nfs_inode *nfsi = NFS_I(inode); | |
1106 | unsigned long *bitlock = &nfsi->flags; | |
1107 | int ret = 0; | |
1108 | ||
1109 | if (IS_SWAPFILE(inode)) | |
1110 | goto out; | |
1111 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1112 | ret = -ECHILD; | |
1113 | goto out; | |
1114 | } | |
1115 | spin_lock(&inode->i_lock); | |
1116 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1117 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1118 | ret = -ECHILD; | |
1119 | spin_unlock(&inode->i_lock); | |
1120 | out: | |
1121 | return ret; | |
1122 | } | |
1123 | ||
717d44e8 | 1124 | /** |
874f9463 | 1125 | * __nfs_revalidate_mapping - Revalidate the pagecache |
717d44e8 TM |
1126 | * @inode - pointer to host inode |
1127 | * @mapping - pointer to mapping | |
874f9463 | 1128 | * @may_lock - take inode->i_mutex? |
717d44e8 | 1129 | */ |
874f9463 TM |
1130 | static int __nfs_revalidate_mapping(struct inode *inode, |
1131 | struct address_space *mapping, | |
1132 | bool may_lock) | |
717d44e8 TM |
1133 | { |
1134 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1135 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1136 | int ret = 0; |
dc59250c | 1137 | |
29418aa4 MG |
1138 | /* swapfiles are not supposed to be shared. */ |
1139 | if (IS_SWAPFILE(inode)) | |
1140 | goto out; | |
1141 | ||
b4b1eadf | 1142 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1143 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1144 | if (ret < 0) | |
1145 | goto out; | |
7d52e862 | 1146 | } |
d529ef83 JL |
1147 | |
1148 | /* | |
1149 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1150 | * invalidations that come in while we're shooting down the mappings | |
1151 | * are respected. But, that leaves a race window where one revalidator | |
1152 | * can clear the flag, and then another checks it before the mapping | |
1153 | * gets invalidated. Fix that by serializing access to this part of | |
1154 | * the function. | |
1155 | * | |
1156 | * At the same time, we need to allow other tasks to see whether we | |
1157 | * might be in the middle of invalidating the pages, so we only set | |
1158 | * the bit lock here if it looks like we're going to be doing that. | |
1159 | */ | |
1160 | for (;;) { | |
74316201 N |
1161 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1162 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1163 | if (ret) |
1164 | goto out; | |
17dfeb91 TM |
1165 | spin_lock(&inode->i_lock); |
1166 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1167 | spin_unlock(&inode->i_lock); | |
1168 | continue; | |
1169 | } | |
1170 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1171 | break; |
d529ef83 | 1172 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1173 | goto out; |
f4ce1299 TM |
1174 | } |
1175 | ||
17dfeb91 | 1176 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1177 | smp_wmb(); |
17dfeb91 TM |
1178 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1179 | spin_unlock(&inode->i_lock); | |
1180 | trace_nfs_invalidate_mapping_enter(inode); | |
874f9463 | 1181 | if (may_lock) { |
5955102c | 1182 | inode_lock(inode); |
874f9463 | 1183 | ret = nfs_invalidate_mapping(inode, mapping); |
5955102c | 1184 | inode_unlock(inode); |
874f9463 TM |
1185 | } else |
1186 | ret = nfs_invalidate_mapping(inode, mapping); | |
17dfeb91 TM |
1187 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1188 | ||
d529ef83 | 1189 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1190 | smp_mb__after_atomic(); |
d529ef83 | 1191 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1192 | out: |
44b11874 | 1193 | return ret; |
7d52e862 TM |
1194 | } |
1195 | ||
874f9463 TM |
1196 | /** |
1197 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1198 | * @inode - pointer to host inode | |
1199 | * @mapping - pointer to mapping | |
1200 | */ | |
1201 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1202 | { | |
1203 | return __nfs_revalidate_mapping(inode, mapping, false); | |
1204 | } | |
1205 | ||
1206 | /** | |
1207 | * nfs_revalidate_mapping_protected - Revalidate the pagecache | |
1208 | * @inode - pointer to host inode | |
1209 | * @mapping - pointer to mapping | |
1210 | * | |
1211 | * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex | |
1212 | * while invalidating the mapping. | |
1213 | */ | |
1214 | int nfs_revalidate_mapping_protected(struct inode *inode, struct address_space *mapping) | |
1215 | { | |
1216 | return __nfs_revalidate_mapping(inode, mapping, true); | |
1217 | } | |
1218 | ||
27dc1cd3 | 1219 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1220 | { |
1221 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1222 | unsigned long ret = 0; |
a895b4a1 | 1223 | |
9e6e70f8 TM |
1224 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1225 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1226 | && inode->i_version == fattr->pre_change_attr) { |
1227 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1228 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1229 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1230 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1231 | } |
a895b4a1 | 1232 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1233 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1234 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1235 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1236 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1237 | ret |= NFS_INO_INVALID_ATTR; | |
1238 | } | |
9e6e70f8 TM |
1239 | |
1240 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1241 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1242 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1243 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1244 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1245 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1246 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1247 | } |
9e6e70f8 TM |
1248 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1249 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1250 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
cb1410c7 | 1251 | && nfsi->nrequests == 0) { |
27dc1cd3 TM |
1252 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
1253 | ret |= NFS_INO_INVALID_ATTR; | |
1254 | } | |
de242c0b | 1255 | |
27dc1cd3 | 1256 | return ret; |
a895b4a1 TM |
1257 | } |
1258 | ||
1da177e4 | 1259 | /** |
33801147 | 1260 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1261 | * @inode - pointer to inode |
1262 | * @fattr - updated attributes | |
1263 | * | |
1264 | * Verifies the attribute cache. If we have just changed the attributes, | |
1265 | * so that fattr carries weak cache consistency data, then it may | |
1266 | * also update the ctime/mtime/change_attribute. | |
1267 | */ | |
33801147 | 1268 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1269 | { |
1270 | struct nfs_inode *nfsi = NFS_I(inode); | |
1271 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1272 | unsigned long invalid = 0; |
1da177e4 | 1273 | |
dc59250c | 1274 | |
01da47bd TM |
1275 | if (nfs_have_delegated_attributes(inode)) |
1276 | return 0; | |
ca62b9c3 | 1277 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1278 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1279 | return -EIO; | |
1280 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1281 | return -EIO; |
ca62b9c3 | 1282 | |
9e6e70f8 | 1283 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
a9a4a87a | 1284 | inode->i_version != fattr->change_attr) |
2a3f5fd4 | 1285 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1da177e4 | 1286 | |
1da177e4 | 1287 | /* Verify a few of the more important attributes */ |
9e6e70f8 | 1288 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
fee7fe19 | 1289 | invalid |= NFS_INO_INVALID_ATTR; |
ca62b9c3 | 1290 | |
9e6e70f8 TM |
1291 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1292 | cur_size = i_size_read(inode); | |
1293 | new_isize = nfs_size_to_loff_t(fattr->size); | |
85a23cee | 1294 | if (cur_size != new_isize) |
9e6e70f8 TM |
1295 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
1296 | } | |
85a23cee TM |
1297 | if (nfsi->nrequests != 0) |
1298 | invalid &= ~NFS_INO_REVAL_PAGECACHE; | |
1da177e4 LT |
1299 | |
1300 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1301 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1302 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1303 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1304 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1305 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1306 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1307 | |
1308 | /* Has the link count changed? */ | |
9e6e70f8 | 1309 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1310 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1311 | |
9e6e70f8 | 1312 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1313 | invalid |= NFS_INO_INVALID_ATIME; |
1314 | ||
1315 | if (invalid != 0) | |
6edf9609 | 1316 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1317 | |
33801147 | 1318 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1319 | return 0; |
1320 | } | |
1321 | ||
ae05f269 | 1322 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1323 | |
1324 | static unsigned long nfs_read_attr_generation_counter(void) | |
1325 | { | |
ae05f269 | 1326 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1327 | } |
1328 | ||
1329 | unsigned long nfs_inc_attr_generation_counter(void) | |
1330 | { | |
ae05f269 | 1331 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1332 | } |
3235b403 | 1333 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1334 | |
1335 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1336 | { | |
1337 | fattr->valid = 0; | |
1338 | fattr->time_start = jiffies; | |
1339 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1340 | fattr->owner_name = NULL; |
1341 | fattr->group_name = NULL; | |
4704f0e2 | 1342 | } |
ddda8e0a | 1343 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1344 | |
140e049c TM |
1345 | /** |
1346 | * nfs_fattr_set_barrier | |
1347 | * @fattr: attributes | |
1348 | * | |
1349 | * Used to set a barrier after an attribute was updated. This | |
1350 | * barrier ensures that older attributes from RPC calls that may | |
1351 | * have raced with our update cannot clobber these new values. | |
1352 | * Note that you are still responsible for ensuring that other | |
1353 | * operations which change the attribute on the server do not | |
1354 | * collide. | |
1355 | */ | |
1356 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1357 | { | |
1358 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1359 | } | |
1360 | ||
2d36bfde TM |
1361 | struct nfs_fattr *nfs_alloc_fattr(void) |
1362 | { | |
1363 | struct nfs_fattr *fattr; | |
1364 | ||
1365 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1366 | if (fattr != NULL) | |
1367 | nfs_fattr_init(fattr); | |
1368 | return fattr; | |
1369 | } | |
ddda8e0a | 1370 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1371 | |
1372 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1373 | { | |
1374 | struct nfs_fh *fh; | |
1375 | ||
1376 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1377 | if (fh != NULL) | |
1378 | fh->size = 0; | |
1379 | return fh; | |
1380 | } | |
ddda8e0a | 1381 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1382 | |
e27d359e | 1383 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1384 | /* |
1385 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1386 | * in the same way that wireshark does | |
1387 | * | |
1388 | * @fh: file handle | |
1389 | * | |
1390 | * For debugging only. | |
1391 | */ | |
1392 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1393 | { | |
1394 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1395 | * not on the result */ | |
1264a2f0 | 1396 | return nfs_fhandle_hash(fh); |
d8e0539e | 1397 | } |
9e6ee76d | 1398 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1399 | |
1400 | /* | |
20d27e92 CL |
1401 | * _nfs_display_fhandle - display an NFS file handle on the console |
1402 | * | |
1403 | * @fh: file handle to display | |
1404 | * @caption: display caption | |
1405 | * | |
1406 | * For debugging only. | |
1407 | */ | |
20d27e92 CL |
1408 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1409 | { | |
1410 | unsigned short i; | |
1411 | ||
fa68a1ba | 1412 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1413 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1414 | return; | |
1415 | } | |
1416 | ||
d8e0539e WAA |
1417 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1418 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1419 | for (i = 0; i < fh->size; i += 16) { |
1420 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1421 | ||
1422 | switch ((fh->size - i - 1) >> 2) { | |
1423 | case 0: | |
1424 | printk(KERN_DEFAULT " %08x\n", | |
1425 | be32_to_cpup(pos)); | |
1426 | break; | |
1427 | case 1: | |
1428 | printk(KERN_DEFAULT " %08x %08x\n", | |
1429 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1430 | break; | |
1431 | case 2: | |
1432 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1433 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1434 | be32_to_cpup(pos + 2)); | |
1435 | break; | |
1436 | default: | |
1437 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1438 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1439 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1440 | } | |
1441 | } | |
1442 | } | |
9e6ee76d | 1443 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1444 | #endif |
1445 | ||
a10ad176 TM |
1446 | /** |
1447 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1448 | * @inode - pointer to inode | |
1449 | * @fattr - attributes | |
1450 | * | |
1451 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1452 | * attributes got scheduled after another call carrying updated ones. | |
1453 | * | |
1454 | * To do so, the function first assumes that a more recent ctime means | |
1455 | * that the attributes in fattr are newer, however it also attempt to | |
1456 | * catch the case where ctime either didn't change, or went backwards | |
1457 | * (if someone reset the clock on the server) by looking at whether | |
1458 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1459 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1460 | * |
1461 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1462 | * more recent than the ones cached in the inode. | |
1463 | * | |
1464 | */ | |
1465 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1466 | { | |
1467 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1468 | ||
4704f0e2 | 1469 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1470 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1471 | } |
1472 | ||
d8c951c3 TM |
1473 | /* |
1474 | * Don't trust the change_attribute, mtime, ctime or size if | |
1475 | * a pnfs LAYOUTCOMMIT is outstanding | |
1476 | */ | |
1477 | static void nfs_inode_attrs_handle_layoutcommit(struct inode *inode, | |
1478 | struct nfs_fattr *fattr) | |
1479 | { | |
1480 | if (pnfs_layoutcommit_outstanding(inode)) | |
1481 | fattr->valid &= ~(NFS_ATTR_FATTR_CHANGE | | |
1482 | NFS_ATTR_FATTR_MTIME | | |
1483 | NFS_ATTR_FATTR_CTIME | | |
1484 | NFS_ATTR_FATTR_SIZE); | |
1485 | } | |
1486 | ||
a10ad176 TM |
1487 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1488 | { | |
f4ce1299 TM |
1489 | int ret; |
1490 | ||
1491 | trace_nfs_refresh_inode_enter(inode); | |
1492 | ||
d8c951c3 TM |
1493 | nfs_inode_attrs_handle_layoutcommit(inode, fattr); |
1494 | ||
a10ad176 | 1495 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1496 | ret = nfs_update_inode(inode, fattr); |
1497 | else | |
1498 | ret = nfs_check_inode_attributes(inode, fattr); | |
1499 | ||
1500 | trace_nfs_refresh_inode_exit(inode, ret); | |
1501 | return ret; | |
870a5be8 TM |
1502 | } |
1503 | ||
33801147 TM |
1504 | /** |
1505 | * nfs_refresh_inode - try to update the inode attribute cache | |
1506 | * @inode - pointer to inode | |
1507 | * @fattr - updated attributes | |
1508 | * | |
1509 | * Check that an RPC call that returned attributes has not overlapped with | |
1510 | * other recent updates of the inode metadata, then decide whether it is | |
1511 | * safe to do a full update of the inode attributes, or whether just to | |
1512 | * call nfs_check_inode_attributes. | |
1513 | */ | |
1514 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1515 | { | |
33801147 TM |
1516 | int status; |
1517 | ||
1518 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1519 | return 0; | |
1520 | spin_lock(&inode->i_lock); | |
870a5be8 | 1521 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1522 | spin_unlock(&inode->i_lock); |
ef79c097 | 1523 | |
33801147 TM |
1524 | return status; |
1525 | } | |
ddda8e0a | 1526 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1527 | |
d65f557f TM |
1528 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1529 | { | |
6edf9609 | 1530 | unsigned long invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; |
d65f557f | 1531 | |
aaae3f00 TM |
1532 | /* |
1533 | * Don't revalidate the pagecache if we hold a delegation, but do | |
1534 | * force an attribute update | |
1535 | */ | |
1536 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) | |
1537 | invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_FORCED; | |
1538 | ||
6edf9609 TM |
1539 | if (S_ISDIR(inode->i_mode)) |
1540 | invalid |= NFS_INO_INVALID_DATA; | |
1541 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1542 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1543 | return 0; | |
1544 | return nfs_refresh_inode_locked(inode, fattr); | |
1545 | } | |
1546 | ||
decf491f TM |
1547 | /** |
1548 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1549 | * @inode - pointer to inode | |
1550 | * @fattr - updated attributes | |
1551 | * | |
1552 | * After an operation that has changed the inode metadata, mark the | |
1553 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1554 | * |
1555 | * NB: if the server didn't return any post op attributes, this | |
1556 | * function will force the retrieval of attributes before the next | |
1557 | * NFS request. Thus it should be used only for operations that | |
1558 | * are expected to change one or more attributes, to avoid | |
1559 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1560 | */ |
1561 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1562 | { | |
d65f557f | 1563 | int status; |
decf491f | 1564 | |
7668fdbe | 1565 | spin_lock(&inode->i_lock); |
92d64e47 | 1566 | nfs_fattr_set_barrier(fattr); |
d65f557f | 1567 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1568 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1569 | |
870a5be8 | 1570 | return status; |
decf491f | 1571 | } |
1c606fb7 | 1572 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1573 | |
70ca8852 | 1574 | /** |
a08a8cd3 | 1575 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
70ca8852 TM |
1576 | * @inode - pointer to inode |
1577 | * @fattr - updated attributes | |
1578 | * | |
1579 | * After an operation that has changed the inode metadata, mark the | |
1580 | * attribute cache as being invalid, then try to update it. Fake up | |
1581 | * weak cache consistency data, if none exist. | |
1582 | * | |
1583 | * This function is mainly designed to be used by the ->write_done() functions. | |
1584 | */ | |
a08a8cd3 | 1585 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1586 | { |
d65f557f TM |
1587 | int status; |
1588 | ||
d65f557f TM |
1589 | /* Don't do a WCC update if these attributes are already stale */ |
1590 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1591 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1592 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1593 | | NFS_ATTR_FATTR_PRESIZE | |
1594 | | NFS_ATTR_FATTR_PREMTIME | |
1595 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1596 | goto out_noforce; |
1597 | } | |
9e6e70f8 TM |
1598 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1599 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1600 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1601 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1602 | } |
9e6e70f8 TM |
1603 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1604 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1605 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1606 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1607 | } | |
1608 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1609 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1610 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1611 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1612 | } | |
1613 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1614 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1615 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1616 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1617 | } |
d65f557f TM |
1618 | out_noforce: |
1619 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
a08a8cd3 TM |
1620 | return status; |
1621 | } | |
1622 | ||
1623 | /** | |
1624 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1625 | * @inode - pointer to inode | |
1626 | * @fattr - updated attributes | |
1627 | * | |
1628 | * After an operation that has changed the inode metadata, mark the | |
1629 | * attribute cache as being invalid, then try to update it. Fake up | |
1630 | * weak cache consistency data, if none exist. | |
1631 | * | |
1632 | * This function is mainly designed to be used by the ->write_done() functions. | |
1633 | */ | |
1634 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1635 | { | |
1636 | int status; | |
1637 | ||
1638 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1639 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1640 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1641 | spin_unlock(&inode->i_lock); |
1642 | return status; | |
70ca8852 | 1643 | } |
ddda8e0a | 1644 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1645 | |
ea96d1ec AS |
1646 | |
1647 | static inline bool nfs_fileid_valid(struct nfs_inode *nfsi, | |
1648 | struct nfs_fattr *fattr) | |
1649 | { | |
1650 | bool ret1 = true, ret2 = true; | |
1651 | ||
1652 | if (fattr->valid & NFS_ATTR_FATTR_FILEID) | |
1653 | ret1 = (nfsi->fileid == fattr->fileid); | |
1654 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1655 | ret2 = (nfsi->fileid == fattr->mounted_on_fileid); | |
1656 | return ret1 || ret2; | |
1657 | } | |
1658 | ||
1da177e4 LT |
1659 | /* |
1660 | * Many nfs protocol calls return the new file attributes after | |
1661 | * an operation. Here we update the inode to reflect the state | |
1662 | * of the server's inode. | |
1663 | * | |
1664 | * This is a bit tricky because we have to make sure all dirty pages | |
1665 | * have been sent off to the server before calling invalidate_inode_pages. | |
1666 | * To make sure no other process adds more write requests while we try | |
1667 | * our best to flush them, we make them sleep during the attribute refresh. | |
1668 | * | |
1669 | * A very similar scenario holds for the dir cache. | |
1670 | */ | |
24aa1fe6 | 1671 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1672 | { |
8b4bdcf8 | 1673 | struct nfs_server *server; |
1da177e4 | 1674 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1675 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1676 | unsigned long invalid = 0; |
3e7d950a | 1677 | unsigned long now = jiffies; |
62ab460c | 1678 | unsigned long save_cache_validity; |
ade14a7d | 1679 | bool cache_revalidated = true; |
1da177e4 | 1680 | |
1e8968c5 | 1681 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1682 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1683 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1684 | atomic_read(&inode->i_count), fattr->valid); |
1685 | ||
ea96d1ec | 1686 | if (!nfs_fileid_valid(nfsi, fattr)) { |
e73e6c9e MT |
1687 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1688 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1689 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1690 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1691 | (long long)fattr->fileid); | |
1692 | goto out_err; | |
1693 | } | |
1da177e4 LT |
1694 | |
1695 | /* | |
1696 | * Make sure the inode's type hasn't changed. | |
1697 | */ | |
e73e6c9e MT |
1698 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1699 | /* | |
1700 | * Big trouble! The inode has become a different object. | |
1701 | */ | |
1e8968c5 | 1702 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1703 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1704 | goto out_err; | |
1705 | } | |
1da177e4 | 1706 | |
8b4bdcf8 | 1707 | server = NFS_SERVER(inode); |
a0356862 | 1708 | /* Update the fsid? */ |
9e6e70f8 | 1709 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1710 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1711 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1712 | server->fsid = fattr->fsid; |
1713 | ||
1da177e4 LT |
1714 | /* |
1715 | * Update the read time so we don't revalidate too often. | |
1716 | */ | |
33801147 | 1717 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1718 | |
62ab460c TM |
1719 | save_cache_validity = nfsi->cache_validity; |
1720 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1721 | | NFS_INO_INVALID_ATIME | |
1722 | | NFS_INO_REVAL_FORCED | |
1723 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1724 | |
a895b4a1 | 1725 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1726 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1727 | |
47aabaa7 | 1728 | /* More cache consistency checks */ |
9e6e70f8 | 1729 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1730 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1731 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1732 | inode->i_sb->s_id, inode->i_ino); | |
6a4506c0 TM |
1733 | invalid |= NFS_INO_INVALID_ATTR |
1734 | | NFS_INO_INVALID_DATA | |
1735 | | NFS_INO_INVALID_ACCESS | |
85a23cee | 1736 | | NFS_INO_INVALID_ACL; |
9e6e70f8 TM |
1737 | if (S_ISDIR(inode->i_mode)) |
1738 | nfs_force_lookup_revalidate(inode); | |
a9a4a87a | 1739 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1740 | } |
ade14a7d | 1741 | } else { |
43b6535e | 1742 | nfsi->cache_validity |= save_cache_validity; |
ade14a7d TM |
1743 | cache_revalidated = false; |
1744 | } | |
9e6e70f8 TM |
1745 | |
1746 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1747 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
ade14a7d | 1748 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e TM |
1749 | nfsi->cache_validity |= save_cache_validity & |
1750 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1751 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1752 | cache_revalidated = false; |
1753 | } | |
62ab460c | 1754 | |
9e6e70f8 | 1755 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1756 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
ade14a7d | 1757 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e TM |
1758 | nfsi->cache_validity |= save_cache_validity & |
1759 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1760 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1761 | cache_revalidated = false; |
1762 | } | |
47aabaa7 | 1763 | |
951a143b | 1764 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1765 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1766 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1767 | cur_isize = i_size_read(inode); | |
1768 | if (new_isize != cur_isize) { | |
1769 | /* Do we perhaps have any outstanding writes, or has | |
1770 | * the file grown beyond our last write? */ | |
cb1410c7 | 1771 | if ((nfsi->nrequests == 0) || new_isize > cur_isize) { |
9e6e70f8 TM |
1772 | i_size_write(inode, new_isize); |
1773 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
1774 | } | |
60c16ea8 HJ |
1775 | dprintk("NFS: isize change on server for file %s/%ld " |
1776 | "(%Ld to %Ld)\n", | |
1777 | inode->i_sb->s_id, | |
1778 | inode->i_ino, | |
1779 | (long long)cur_isize, | |
1780 | (long long)new_isize); | |
1da177e4 | 1781 | } |
ade14a7d | 1782 | } else { |
43b6535e TM |
1783 | nfsi->cache_validity |= save_cache_validity & |
1784 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1785 | | NFS_INO_REVAL_PAGECACHE |
1786 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1787 | cache_revalidated = false; |
1788 | } | |
1da177e4 | 1789 | |
1da177e4 | 1790 | |
9e6e70f8 TM |
1791 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1792 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
ade14a7d | 1793 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1794 | nfsi->cache_validity |= save_cache_validity & |
1795 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1796 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1797 | cache_revalidated = false; |
1798 | } | |
1da177e4 | 1799 | |
9e6e70f8 TM |
1800 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1801 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1802 | umode_t newmode = inode->i_mode & S_IFMT; |
1803 | newmode |= fattr->mode & S_IALLUGO; | |
1804 | inode->i_mode = newmode; | |
9e6e70f8 | 1805 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1806 | } |
ade14a7d | 1807 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e TM |
1808 | nfsi->cache_validity |= save_cache_validity & |
1809 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1810 | | NFS_INO_INVALID_ACCESS |
1811 | | NFS_INO_INVALID_ACL | |
1812 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1813 | cache_revalidated = false; |
1814 | } | |
62ab460c | 1815 | |
9e6e70f8 | 1816 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1817 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1818 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1819 | inode->i_uid = fattr->uid; | |
1820 | } | |
ade14a7d | 1821 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e TM |
1822 | nfsi->cache_validity |= save_cache_validity & |
1823 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1824 | | NFS_INO_INVALID_ACCESS |
1825 | | NFS_INO_INVALID_ACL | |
1826 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1827 | cache_revalidated = false; |
1828 | } | |
62ab460c | 1829 | |
9e6e70f8 | 1830 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1831 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1832 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1833 | inode->i_gid = fattr->gid; | |
1834 | } | |
ade14a7d | 1835 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e TM |
1836 | nfsi->cache_validity |= save_cache_validity & |
1837 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1838 | | NFS_INO_INVALID_ACCESS |
1839 | | NFS_INO_INVALID_ACL | |
1840 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1841 | cache_revalidated = false; |
1842 | } | |
921615f1 | 1843 | |
9e6e70f8 TM |
1844 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1845 | if (inode->i_nlink != fattr->nlink) { | |
1846 | invalid |= NFS_INO_INVALID_ATTR; | |
1847 | if (S_ISDIR(inode->i_mode)) | |
1848 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1849 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1850 | } |
ade14a7d | 1851 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e TM |
1852 | nfsi->cache_validity |= save_cache_validity & |
1853 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1854 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1855 | cache_revalidated = false; |
1856 | } | |
1da177e4 | 1857 | |
9e6e70f8 | 1858 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1859 | /* |
1860 | * report the blocks in 512byte units | |
1861 | */ | |
1862 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 1863 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 1864 | inode->i_blocks = fattr->du.nfs2.blocks; |
ade14a7d TM |
1865 | else |
1866 | cache_revalidated = false; | |
1da177e4 LT |
1867 | |
1868 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1869 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1870 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1871 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1872 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 1873 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 1874 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1875 | } else { |
ade14a7d TM |
1876 | if (cache_revalidated) { |
1877 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
1878 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
1879 | nfsi->attrtimeo <<= 1; | |
1880 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
1881 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1882 | } | |
6d2b2966 TM |
1883 | nfsi->attrtimeo_timestamp = now; |
1884 | } | |
f5062003 TM |
1885 | /* Set the barrier to be more recent than this fattr */ |
1886 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
1887 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 1888 | } |
c812012f JL |
1889 | |
1890 | /* Don't declare attrcache up to date if there were no attrs! */ | |
ade14a7d | 1891 | if (cache_revalidated) |
c812012f JL |
1892 | invalid &= ~NFS_INO_INVALID_ATTR; |
1893 | ||
1da177e4 LT |
1894 | /* Don't invalidate the data if we were to blame */ |
1895 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1896 | || S_ISLNK(inode->i_mode))) | |
1897 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1898 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1899 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1900 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1901 | |
1da177e4 | 1902 | return 0; |
b37b03b7 | 1903 | out_err: |
1da177e4 LT |
1904 | /* |
1905 | * No need to worry about unhashing the dentry, as the | |
1906 | * lookup validation will know that the inode is bad. | |
1907 | * (But we fall through to invalidate the caches.) | |
1908 | */ | |
1909 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1910 | return -ESTALE; |
1911 | } | |
1912 | ||
f7b422b1 | 1913 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1914 | { |
1915 | struct nfs_inode *nfsi; | |
c456aacf | 1916 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1917 | if (!nfsi) |
1918 | return NULL; | |
55296809 CL |
1919 | nfsi->flags = 0UL; |
1920 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1921 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1922 | nfsi->nfs4_acl = NULL; |
1923 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1924 | return &nfsi->vfs_inode; |
1925 | } | |
89d77c8f | 1926 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1927 | |
fa0d7e3d | 1928 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1929 | { |
fa0d7e3d | 1930 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1931 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1932 | } | |
1933 | ||
fa0d7e3d NP |
1934 | void nfs_destroy_inode(struct inode *inode) |
1935 | { | |
1936 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1937 | } | |
89d77c8f | 1938 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1939 | |
d75d5414 AM |
1940 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1941 | { | |
89d77c8f | 1942 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1943 | INIT_LIST_HEAD(&nfsi->open_states); |
1944 | nfsi->delegation = NULL; | |
d75d5414 | 1945 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 1946 | nfsi->layout = NULL; |
d75d5414 AM |
1947 | #endif |
1948 | } | |
f7b422b1 | 1949 | |
51cc5068 | 1950 | static void init_once(void *foo) |
1da177e4 LT |
1951 | { |
1952 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1953 | ||
a35afb83 | 1954 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1955 | INIT_LIST_HEAD(&nfsi->open_files); |
1956 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1957 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1958 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
cb1410c7 | 1959 | nfsi->nrequests = 0; |
ea2cf228 | 1960 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1961 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
884be175 | 1962 | init_rwsem(&nfsi->rmdir_sem); |
a35afb83 | 1963 | nfs4_init_once(nfsi); |
1da177e4 | 1964 | } |
20c2df83 | 1965 | |
f7b422b1 | 1966 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1967 | { |
1968 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1969 | sizeof(struct nfs_inode), | |
fffb60f9 | 1970 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 1971 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 1972 | init_once); |
1da177e4 LT |
1973 | if (nfs_inode_cachep == NULL) |
1974 | return -ENOMEM; | |
1975 | ||
1976 | return 0; | |
1977 | } | |
1978 | ||
266bee88 | 1979 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1980 | { |
8c0a8537 KS |
1981 | /* |
1982 | * Make sure all delayed rcu free inodes are flushed before we | |
1983 | * destroy cache. | |
1984 | */ | |
1985 | rcu_barrier(); | |
1a1d92c1 | 1986 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1987 | } |
1988 | ||
5746006f | 1989 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1990 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1991 | |
1992 | /* | |
1993 | * start up the nfsiod workqueue | |
1994 | */ | |
1995 | static int nfsiod_start(void) | |
1996 | { | |
1997 | struct workqueue_struct *wq; | |
1998 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1999 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
2000 | if (wq == NULL) |
2001 | return -ENOMEM; | |
2002 | nfsiod_workqueue = wq; | |
2003 | return 0; | |
2004 | } | |
2005 | ||
2006 | /* | |
2007 | * Destroy the nfsiod workqueue | |
2008 | */ | |
2009 | static void nfsiod_stop(void) | |
2010 | { | |
2011 | struct workqueue_struct *wq; | |
2012 | ||
2013 | wq = nfsiod_workqueue; | |
2014 | if (wq == NULL) | |
2015 | return; | |
2016 | nfsiod_workqueue = NULL; | |
2017 | destroy_workqueue(wq); | |
2018 | } | |
2019 | ||
1b340d01 | 2020 | int nfs_net_id; |
9e2e74db | 2021 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2022 | |
2023 | static int nfs_net_init(struct net *net) | |
2024 | { | |
6b13168b | 2025 | nfs_clients_init(net); |
65b38851 | 2026 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2027 | } |
2028 | ||
2029 | static void nfs_net_exit(struct net *net) | |
2030 | { | |
65b38851 | 2031 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 2032 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
2033 | } |
2034 | ||
2035 | static struct pernet_operations nfs_net_ops = { | |
2036 | .init = nfs_net_init, | |
2037 | .exit = nfs_net_exit, | |
2038 | .id = &nfs_net_id, | |
2039 | .size = sizeof(struct nfs_net), | |
2040 | }; | |
2041 | ||
1da177e4 LT |
2042 | /* |
2043 | * Initialize NFS | |
2044 | */ | |
2045 | static int __init init_nfs_fs(void) | |
2046 | { | |
2047 | int err; | |
2048 | ||
1b340d01 | 2049 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2050 | if (err < 0) |
89d77c8f | 2051 | goto out9; |
e571cbf1 | 2052 | |
8ec442ae DH |
2053 | err = nfs_fscache_register(); |
2054 | if (err < 0) | |
89d77c8f | 2055 | goto out8; |
8ec442ae | 2056 | |
5746006f TM |
2057 | err = nfsiod_start(); |
2058 | if (err) | |
89d77c8f | 2059 | goto out7; |
5746006f | 2060 | |
6aaca566 DH |
2061 | err = nfs_fs_proc_init(); |
2062 | if (err) | |
89d77c8f | 2063 | goto out6; |
6aaca566 | 2064 | |
1da177e4 LT |
2065 | err = nfs_init_nfspagecache(); |
2066 | if (err) | |
89d77c8f | 2067 | goto out5; |
1da177e4 LT |
2068 | |
2069 | err = nfs_init_inodecache(); | |
2070 | if (err) | |
89d77c8f | 2071 | goto out4; |
1da177e4 LT |
2072 | |
2073 | err = nfs_init_readpagecache(); | |
2074 | if (err) | |
89d77c8f | 2075 | goto out3; |
1da177e4 LT |
2076 | |
2077 | err = nfs_init_writepagecache(); | |
2078 | if (err) | |
89d77c8f | 2079 | goto out2; |
1da177e4 | 2080 | |
1da177e4 LT |
2081 | err = nfs_init_directcache(); |
2082 | if (err) | |
89d77c8f | 2083 | goto out1; |
1da177e4 | 2084 | |
ec7652aa | 2085 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2086 | |
2087 | err = register_nfs_fs(); | |
2088 | if (err) | |
129d1977 BS |
2089 | goto out0; |
2090 | ||
1da177e4 | 2091 | return 0; |
129d1977 | 2092 | out0: |
ec7652aa | 2093 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2094 | nfs_destroy_directcache(); |
89d77c8f | 2095 | out1: |
129d1977 | 2096 | nfs_destroy_writepagecache(); |
89d77c8f | 2097 | out2: |
129d1977 | 2098 | nfs_destroy_readpagecache(); |
89d77c8f | 2099 | out3: |
129d1977 | 2100 | nfs_destroy_inodecache(); |
89d77c8f | 2101 | out4: |
129d1977 | 2102 | nfs_destroy_nfspagecache(); |
89d77c8f | 2103 | out5: |
129d1977 | 2104 | nfs_fs_proc_exit(); |
89d77c8f | 2105 | out6: |
129d1977 | 2106 | nfsiod_stop(); |
89d77c8f | 2107 | out7: |
129d1977 | 2108 | nfs_fscache_unregister(); |
89d77c8f | 2109 | out8: |
129d1977 | 2110 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2111 | out9: |
1da177e4 LT |
2112 | return err; |
2113 | } | |
2114 | ||
2115 | static void __exit exit_nfs_fs(void) | |
2116 | { | |
1da177e4 | 2117 | nfs_destroy_directcache(); |
1da177e4 LT |
2118 | nfs_destroy_writepagecache(); |
2119 | nfs_destroy_readpagecache(); | |
2120 | nfs_destroy_inodecache(); | |
2121 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2122 | nfs_fscache_unregister(); |
1b340d01 | 2123 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2124 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2125 | unregister_nfs_fs(); |
6aaca566 | 2126 | nfs_fs_proc_exit(); |
5746006f | 2127 | nfsiod_stop(); |
1da177e4 LT |
2128 | } |
2129 | ||
2130 | /* Not quite true; I just maintain it */ | |
2131 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2132 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2133 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2134 | |
2135 | module_init(init_nfs_fs) | |
2136 | module_exit(exit_nfs_fs) |