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)) { |
79566ef0 | 665 | err = filemap_write_and_wait(inode->i_mapping); |
acdc53b2 TM |
666 | if (err) |
667 | goto out; | |
28c494c5 | 668 | } |
fc33a7bb CH |
669 | |
670 | /* | |
671 | * We may force a getattr if the user cares about atime. | |
672 | * | |
673 | * Note that we only have to check the vfsmount flags here: | |
674 | * - NFS always sets S_NOATIME by so checking it would give a | |
675 | * bogus result | |
676 | * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is | |
677 | * no point in checking those. | |
678 | */ | |
679 | if ((mnt->mnt_flags & MNT_NOATIME) || | |
680 | ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
1da177e4 | 681 | need_atime = 0; |
fc33a7bb | 682 | |
311324ad TM |
683 | if (need_atime || nfs_need_revalidate_inode(inode)) { |
684 | struct nfs_server *server = NFS_SERVER(inode); | |
685 | ||
686 | if (server->caps & NFS_CAP_READDIRPLUS) | |
687 | nfs_request_parent_use_readdirplus(dentry); | |
688 | err = __nfs_revalidate_inode(server, inode); | |
689 | } | |
4e769b93 | 690 | if (!err) { |
1da177e4 | 691 | generic_fillattr(inode, stat); |
f43bf0be | 692 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
7ef5ca4f N |
693 | if (S_ISDIR(inode->i_mode)) |
694 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
4e769b93 | 695 | } |
acdc53b2 | 696 | out: |
f4ce1299 | 697 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
698 | return err; |
699 | } | |
ddda8e0a | 700 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 701 | |
f11ac8db TM |
702 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
703 | { | |
704 | atomic_set(&l_ctx->count, 1); | |
2a369153 TM |
705 | l_ctx->lockowner.l_owner = current->files; |
706 | l_ctx->lockowner.l_pid = current->tgid; | |
f11ac8db | 707 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 708 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
709 | } |
710 | ||
711 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
712 | { | |
8c86899f TM |
713 | struct nfs_lock_context *head = &ctx->lock_context; |
714 | struct nfs_lock_context *pos = head; | |
f11ac8db | 715 | |
8c86899f | 716 | do { |
2a369153 | 717 | if (pos->lockowner.l_owner != current->files) |
f11ac8db | 718 | continue; |
2a369153 | 719 | if (pos->lockowner.l_pid != current->tgid) |
f11ac8db TM |
720 | continue; |
721 | atomic_inc(&pos->count); | |
722 | return pos; | |
8c86899f | 723 | } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head); |
f11ac8db TM |
724 | return NULL; |
725 | } | |
726 | ||
727 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
728 | { | |
729 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 730 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
731 | |
732 | spin_lock(&inode->i_lock); | |
733 | res = __nfs_find_lock_context(ctx); | |
734 | if (res == NULL) { | |
735 | spin_unlock(&inode->i_lock); | |
736 | new = kmalloc(sizeof(*new), GFP_KERNEL); | |
737 | if (new == NULL) | |
b3c54de6 | 738 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
739 | nfs_init_lock_context(new); |
740 | spin_lock(&inode->i_lock); | |
741 | res = __nfs_find_lock_context(ctx); | |
742 | if (res == NULL) { | |
743 | list_add_tail(&new->list, &ctx->lock_context.list); | |
744 | new->open_context = ctx; | |
745 | res = new; | |
746 | new = NULL; | |
747 | } | |
748 | } | |
749 | spin_unlock(&inode->i_lock); | |
750 | kfree(new); | |
751 | return res; | |
752 | } | |
1c6dcbe5 | 753 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
754 | |
755 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
756 | { | |
757 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 758 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db TM |
759 | |
760 | if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock)) | |
761 | return; | |
762 | list_del(&l_ctx->list); | |
763 | spin_unlock(&inode->i_lock); | |
764 | kfree(l_ctx); | |
765 | } | |
1c6dcbe5 | 766 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 767 | |
7fe5c398 TM |
768 | /** |
769 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
770 | * @ctx: pointer to context | |
771 | * @is_sync: is this a synchronous close | |
772 | * | |
5cf9d706 TM |
773 | * Ensure that the attributes are up to date if we're mounted |
774 | * with close-to-open semantics and we have cached data that will | |
775 | * need to be revalidated on open. | |
7fe5c398 TM |
776 | */ |
777 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
778 | { | |
5cf9d706 | 779 | struct nfs_inode *nfsi; |
7fe5c398 TM |
780 | struct inode *inode; |
781 | struct nfs_server *server; | |
782 | ||
783 | if (!(ctx->mode & FMODE_WRITE)) | |
784 | return; | |
785 | if (!is_sync) | |
786 | return; | |
2b0143b5 | 787 | inode = d_inode(ctx->dentry); |
5cf9d706 TM |
788 | nfsi = NFS_I(inode); |
789 | if (inode->i_mapping->nrpages == 0) | |
790 | return; | |
791 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
792 | return; | |
793 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 TM |
794 | return; |
795 | server = NFS_SERVER(inode); | |
796 | if (server->flags & NFS_MOUNT_NOCTO) | |
797 | return; | |
798 | nfs_revalidate_inode(server, inode); | |
799 | } | |
ddda8e0a | 800 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 801 | |
5ede7b1c | 802 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode) |
1da177e4 LT |
803 | { |
804 | struct nfs_open_context *ctx; | |
5ede7b1c AV |
805 | struct rpc_cred *cred = rpc_lookup_cred(); |
806 | if (IS_ERR(cred)) | |
807 | return ERR_CAST(cred); | |
1da177e4 | 808 | |
f52720ca | 809 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL); |
5ede7b1c AV |
810 | if (!ctx) { |
811 | put_rpccred(cred); | |
812 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 813 | } |
5ede7b1c AV |
814 | nfs_sb_active(dentry->d_sb); |
815 | ctx->dentry = dget(dentry); | |
816 | ctx->cred = cred; | |
817 | ctx->state = NULL; | |
818 | ctx->mode = f_mode; | |
819 | ctx->flags = 0; | |
820 | ctx->error = 0; | |
821 | nfs_init_lock_context(&ctx->lock_context); | |
822 | ctx->lock_context.open_context = ctx; | |
823 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 824 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
825 | return ctx; |
826 | } | |
89d77c8f | 827 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
828 | |
829 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
830 | { | |
831 | if (ctx != NULL) | |
f11ac8db | 832 | atomic_inc(&ctx->lock_context.count); |
1da177e4 LT |
833 | return ctx; |
834 | } | |
89d77c8f | 835 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 836 | |
7fe5c398 | 837 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 838 | { |
2b0143b5 | 839 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 840 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 841 | |
5c78f58e | 842 | if (!list_empty(&ctx->list)) { |
ef84303e BH |
843 | if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock)) |
844 | return; | |
845 | list_del(&ctx->list); | |
846 | spin_unlock(&inode->i_lock); | |
ef84303e | 847 | } else if (!atomic_dec_and_test(&ctx->lock_context.count)) |
5e11934d | 848 | return; |
5c78f58e TM |
849 | if (inode != NULL) |
850 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
3bec63db TM |
851 | if (ctx->cred != NULL) |
852 | put_rpccred(ctx->cred); | |
3d4ff43d | 853 | dput(ctx->dentry); |
322b2b90 | 854 | nfs_sb_deactive(sb); |
82be417a | 855 | kfree(ctx->mdsthreshold); |
3bec63db TM |
856 | kfree(ctx); |
857 | } | |
858 | ||
a49c3c77 TM |
859 | void put_nfs_open_context(struct nfs_open_context *ctx) |
860 | { | |
861 | __put_nfs_open_context(ctx, 0); | |
862 | } | |
89d77c8f | 863 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 864 | |
4eae5014 TM |
865 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
866 | { | |
867 | __put_nfs_open_context(ctx, 1); | |
868 | } | |
869 | ||
1da177e4 LT |
870 | /* |
871 | * Ensure that mmap has a recent RPC credential for use when writing out | |
872 | * shared pages | |
873 | */ | |
c45ffdd2 | 874 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 875 | { |
2b0143b5 | 876 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
877 | struct nfs_inode *nfsi = NFS_I(inode); |
878 | ||
1da177e4 | 879 | spin_lock(&inode->i_lock); |
ca0daa27 TM |
880 | if (ctx->mode & FMODE_WRITE) |
881 | list_add(&ctx->list, &nfsi->open_files); | |
882 | else | |
883 | list_add_tail(&ctx->list, &nfsi->open_files); | |
1da177e4 LT |
884 | spin_unlock(&inode->i_lock); |
885 | } | |
c45ffdd2 TM |
886 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
887 | ||
888 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
889 | { | |
890 | filp->private_data = get_nfs_open_context(ctx); | |
891 | if (list_empty(&ctx->list)) | |
892 | nfs_inode_attach_open_context(ctx); | |
893 | } | |
89d77c8f | 894 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 895 | |
d530838b TM |
896 | /* |
897 | * Given an inode, search for an open context with the desired characteristics | |
898 | */ | |
dc0b027d | 899 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode) |
1da177e4 LT |
900 | { |
901 | struct nfs_inode *nfsi = NFS_I(inode); | |
902 | struct nfs_open_context *pos, *ctx = NULL; | |
903 | ||
904 | spin_lock(&inode->i_lock); | |
905 | list_for_each_entry(pos, &nfsi->open_files, list) { | |
d530838b TM |
906 | if (cred != NULL && pos->cred != cred) |
907 | continue; | |
1544fa0f TM |
908 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
909 | continue; | |
910 | ctx = get_nfs_open_context(pos); | |
911 | break; | |
1da177e4 LT |
912 | } |
913 | spin_unlock(&inode->i_lock); | |
914 | return ctx; | |
915 | } | |
916 | ||
aff8d8dc | 917 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 918 | { |
cd3758e3 | 919 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
920 | |
921 | if (ctx) { | |
2b0143b5 | 922 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 923 | |
0bcbf039 PT |
924 | /* |
925 | * We fatal error on write before. Try to writeback | |
926 | * every page again. | |
927 | */ | |
928 | if (ctx->error < 0) | |
929 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 LT |
930 | filp->private_data = NULL; |
931 | spin_lock(&inode->i_lock); | |
932 | list_move_tail(&ctx->list, &NFS_I(inode)->open_files); | |
933 | spin_unlock(&inode->i_lock); | |
4eae5014 | 934 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
935 | } |
936 | } | |
937 | ||
938 | /* | |
939 | * These allocate and release file read/write context information. | |
940 | */ | |
941 | int nfs_open(struct inode *inode, struct file *filp) | |
942 | { | |
943 | struct nfs_open_context *ctx; | |
1da177e4 | 944 | |
be62a1a8 | 945 | ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode); |
5ede7b1c AV |
946 | if (IS_ERR(ctx)) |
947 | return PTR_ERR(ctx); | |
1da177e4 LT |
948 | nfs_file_set_open_context(filp, ctx); |
949 | put_nfs_open_context(ctx); | |
f1fe29b4 | 950 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
951 | return 0; |
952 | } | |
953 | ||
1da177e4 LT |
954 | /* |
955 | * This function is called whenever some part of NFS notices that | |
956 | * the cached attributes have to be refreshed. | |
957 | */ | |
958 | int | |
959 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
960 | { | |
961 | int status = -ESTALE; | |
1775fd3e | 962 | struct nfs4_label *label = NULL; |
a3cba2aa | 963 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 964 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 965 | |
1e8968c5 NV |
966 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
967 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 968 | |
f4ce1299 TM |
969 | trace_nfs_revalidate_inode_enter(inode); |
970 | ||
85233a7a | 971 | if (is_bad_inode(inode)) |
691beb13 | 972 | goto out; |
1da177e4 | 973 | if (NFS_STALE(inode)) |
412d582e | 974 | goto out; |
7fdc49c4 | 975 | |
ac46bd37 TM |
976 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
977 | if (S_ISREG(inode->i_mode)) { | |
978 | status = pnfs_sync_inode(inode, false); | |
979 | if (status) | |
980 | goto out; | |
981 | } | |
982 | ||
a3cba2aa TM |
983 | status = -ENOMEM; |
984 | fattr = nfs_alloc_fattr(); | |
985 | if (fattr == NULL) | |
986 | goto out; | |
987 | ||
691beb13 | 988 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 DQ |
989 | |
990 | label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); | |
991 | if (IS_ERR(label)) { | |
992 | status = PTR_ERR(label); | |
993 | goto out; | |
994 | } | |
995 | ||
1775fd3e | 996 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label); |
1da177e4 | 997 | if (status != 0) { |
1e8968c5 | 998 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 999 | inode->i_sb->s_id, |
1e8968c5 | 1000 | (unsigned long long)NFS_FILEID(inode), status); |
1da177e4 LT |
1001 | if (status == -ESTALE) { |
1002 | nfs_zap_caches(inode); | |
1003 | if (!S_ISDIR(inode->i_mode)) | |
3a10c30a | 1004 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
1da177e4 | 1005 | } |
14c43f76 | 1006 | goto err_out; |
1da177e4 LT |
1007 | } |
1008 | ||
a3cba2aa | 1009 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1010 | if (status) { |
1e8968c5 | 1011 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1012 | inode->i_sb->s_id, |
1e8968c5 | 1013 | (unsigned long long)NFS_FILEID(inode), status); |
14c43f76 | 1014 | goto err_out; |
1da177e4 | 1015 | } |
55296809 | 1016 | |
24aa1fe6 | 1017 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1018 | nfs_zap_acl_cache(inode); |
55296809 | 1019 | |
3da580aa JL |
1020 | nfs_setsecurity(inode, fattr, label); |
1021 | ||
1e8968c5 | 1022 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1023 | inode->i_sb->s_id, |
1e8968c5 | 1024 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1025 | |
14c43f76 DQ |
1026 | err_out: |
1027 | nfs4_label_free(label); | |
1028 | out: | |
a3cba2aa | 1029 | nfs_free_fattr(fattr); |
f4ce1299 | 1030 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1031 | return status; |
1032 | } | |
1033 | ||
1034 | int nfs_attribute_timeout(struct inode *inode) | |
1035 | { | |
1036 | struct nfs_inode *nfsi = NFS_I(inode); | |
1037 | ||
d7cf8dd0 TM |
1038 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); |
1039 | } | |
1040 | ||
43f291cd | 1041 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1042 | { |
b4d2314b | 1043 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1044 | return 0; |
d7cf8dd0 | 1045 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1046 | } |
1047 | ||
1048 | /** | |
1049 | * nfs_revalidate_inode - Revalidate the inode attributes | |
1050 | * @server - pointer to nfs_server struct | |
1051 | * @inode - pointer to inode struct | |
1052 | * | |
1053 | * Updates inode attribute information by retrieving the data from the server. | |
1054 | */ | |
1055 | int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1056 | { | |
311324ad | 1057 | if (!nfs_need_revalidate_inode(inode)) |
1da177e4 LT |
1058 | return NFS_STALE(inode) ? -ESTALE : 0; |
1059 | return __nfs_revalidate_inode(server, inode); | |
1060 | } | |
1c606fb7 | 1061 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1062 | |
912a108d N |
1063 | int nfs_revalidate_inode_rcu(struct nfs_server *server, struct inode *inode) |
1064 | { | |
1065 | if (!(NFS_I(inode)->cache_validity & | |
1066 | (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) | |
1067 | && !nfs_attribute_cache_expired(inode)) | |
1068 | return NFS_STALE(inode) ? -ESTALE : 0; | |
1069 | return -ECHILD; | |
1070 | } | |
1071 | ||
1cda707d | 1072 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 TM |
1073 | { |
1074 | struct nfs_inode *nfsi = NFS_I(inode); | |
f8806c84 TM |
1075 | int ret; |
1076 | ||
717d44e8 | 1077 | if (mapping->nrpages != 0) { |
f8806c84 | 1078 | if (S_ISREG(inode->i_mode)) { |
ef070dcb | 1079 | unmap_mapping_range(mapping, 0, 0, 0); |
f8806c84 TM |
1080 | ret = nfs_sync_mapping(mapping); |
1081 | if (ret < 0) | |
1082 | return ret; | |
1083 | } | |
1084 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1085 | if (ret < 0) |
1086 | return ret; | |
1087 | } | |
d529ef83 JL |
1088 | if (S_ISDIR(inode->i_mode)) { |
1089 | spin_lock(&inode->i_lock); | |
717d44e8 | 1090 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); |
d529ef83 JL |
1091 | spin_unlock(&inode->i_lock); |
1092 | } | |
717d44e8 | 1093 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
de242c0b | 1094 | nfs_fscache_wait_on_invalidate(inode); |
f4ce1299 | 1095 | |
1e8968c5 NV |
1096 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1097 | inode->i_sb->s_id, | |
1098 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1099 | return 0; |
1100 | } | |
1101 | ||
b4b1eadf TM |
1102 | static bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1103 | { | |
1104 | if (nfs_have_delegated_attributes(inode)) | |
1105 | return false; | |
1106 | return (NFS_I(inode)->cache_validity & NFS_INO_REVAL_PAGECACHE) | |
1107 | || nfs_attribute_timeout(inode) | |
1108 | || NFS_STALE(inode); | |
1109 | } | |
1110 | ||
0d0def49 AV |
1111 | int nfs_revalidate_mapping_rcu(struct inode *inode) |
1112 | { | |
1113 | struct nfs_inode *nfsi = NFS_I(inode); | |
1114 | unsigned long *bitlock = &nfsi->flags; | |
1115 | int ret = 0; | |
1116 | ||
1117 | if (IS_SWAPFILE(inode)) | |
1118 | goto out; | |
1119 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1120 | ret = -ECHILD; | |
1121 | goto out; | |
1122 | } | |
1123 | spin_lock(&inode->i_lock); | |
1124 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1125 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1126 | ret = -ECHILD; | |
1127 | spin_unlock(&inode->i_lock); | |
1128 | out: | |
1129 | return ret; | |
1130 | } | |
1131 | ||
717d44e8 | 1132 | /** |
be527494 | 1133 | * nfs_revalidate_mapping - Revalidate the pagecache |
717d44e8 TM |
1134 | * @inode - pointer to host inode |
1135 | * @mapping - pointer to mapping | |
717d44e8 | 1136 | */ |
be527494 TM |
1137 | int nfs_revalidate_mapping(struct inode *inode, |
1138 | struct address_space *mapping) | |
717d44e8 TM |
1139 | { |
1140 | struct nfs_inode *nfsi = NFS_I(inode); | |
d529ef83 | 1141 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1142 | int ret = 0; |
dc59250c | 1143 | |
29418aa4 MG |
1144 | /* swapfiles are not supposed to be shared. */ |
1145 | if (IS_SWAPFILE(inode)) | |
1146 | goto out; | |
1147 | ||
b4b1eadf | 1148 | if (nfs_mapping_need_revalidate_inode(inode)) { |
717d44e8 TM |
1149 | ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1150 | if (ret < 0) | |
1151 | goto out; | |
7d52e862 | 1152 | } |
d529ef83 JL |
1153 | |
1154 | /* | |
1155 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1156 | * invalidations that come in while we're shooting down the mappings | |
1157 | * are respected. But, that leaves a race window where one revalidator | |
1158 | * can clear the flag, and then another checks it before the mapping | |
1159 | * gets invalidated. Fix that by serializing access to this part of | |
1160 | * the function. | |
1161 | * | |
1162 | * At the same time, we need to allow other tasks to see whether we | |
1163 | * might be in the middle of invalidating the pages, so we only set | |
1164 | * the bit lock here if it looks like we're going to be doing that. | |
1165 | */ | |
1166 | for (;;) { | |
74316201 N |
1167 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
1168 | nfs_wait_bit_killable, TASK_KILLABLE); | |
d529ef83 JL |
1169 | if (ret) |
1170 | goto out; | |
17dfeb91 TM |
1171 | spin_lock(&inode->i_lock); |
1172 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1173 | spin_unlock(&inode->i_lock); | |
1174 | continue; | |
1175 | } | |
1176 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1177 | break; |
d529ef83 | 1178 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1179 | goto out; |
f4ce1299 TM |
1180 | } |
1181 | ||
17dfeb91 | 1182 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1183 | smp_wmb(); |
17dfeb91 TM |
1184 | nfsi->cache_validity &= ~NFS_INO_INVALID_DATA; |
1185 | spin_unlock(&inode->i_lock); | |
1186 | trace_nfs_invalidate_mapping_enter(inode); | |
be527494 | 1187 | ret = nfs_invalidate_mapping(inode, mapping); |
17dfeb91 TM |
1188 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1189 | ||
d529ef83 | 1190 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1191 | smp_mb__after_atomic(); |
d529ef83 | 1192 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1193 | out: |
44b11874 | 1194 | return ret; |
7d52e862 TM |
1195 | } |
1196 | ||
ca0daa27 | 1197 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
874f9463 | 1198 | { |
ca0daa27 TM |
1199 | struct inode *inode = &nfsi->vfs_inode; |
1200 | ||
1201 | assert_spin_locked(&inode->i_lock); | |
1202 | ||
1203 | if (!S_ISREG(inode->i_mode)) | |
1204 | return false; | |
1205 | if (list_empty(&nfsi->open_files)) | |
1206 | return false; | |
1207 | /* Note: This relies on nfsi->open_files being ordered with writers | |
1208 | * being placed at the head of the list. | |
1209 | * See nfs_inode_attach_open_context() | |
1210 | */ | |
1211 | return (list_first_entry(&nfsi->open_files, | |
1212 | struct nfs_open_context, | |
1213 | list)->mode & FMODE_WRITE) == FMODE_WRITE; | |
874f9463 TM |
1214 | } |
1215 | ||
651b0e70 | 1216 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
874f9463 | 1217 | { |
651b0e70 | 1218 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
874f9463 TM |
1219 | } |
1220 | ||
27dc1cd3 | 1221 | static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 TM |
1222 | { |
1223 | struct nfs_inode *nfsi = NFS_I(inode); | |
27dc1cd3 | 1224 | unsigned long ret = 0; |
a895b4a1 | 1225 | |
9e6e70f8 TM |
1226 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1227 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
a9a4a87a TM |
1228 | && inode->i_version == fattr->pre_change_attr) { |
1229 | inode->i_version = fattr->change_attr; | |
70ca8852 | 1230 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1231 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1232 | ret |= NFS_INO_INVALID_ATTR; |
70ca8852 | 1233 | } |
a895b4a1 | 1234 | /* If we have atomic WCC data, we may update some attributes */ |
9e6e70f8 TM |
1235 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1236 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
27dc1cd3 TM |
1237 | && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) { |
1238 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); | |
1239 | ret |= NFS_INO_INVALID_ATTR; | |
1240 | } | |
9e6e70f8 TM |
1241 | |
1242 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) | |
1243 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
1244 | && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) { | |
27dc1cd3 TM |
1245 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
1246 | if (S_ISDIR(inode->i_mode)) | |
6edf9609 | 1247 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
27dc1cd3 | 1248 | ret |= NFS_INO_INVALID_ATTR; |
a895b4a1 | 1249 | } |
9e6e70f8 TM |
1250 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1251 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1252 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
cb1410c7 | 1253 | && nfsi->nrequests == 0) { |
27dc1cd3 TM |
1254 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
1255 | ret |= NFS_INO_INVALID_ATTR; | |
1256 | } | |
de242c0b | 1257 | |
27dc1cd3 | 1258 | return ret; |
a895b4a1 TM |
1259 | } |
1260 | ||
1da177e4 | 1261 | /** |
33801147 | 1262 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
1da177e4 LT |
1263 | * @inode - pointer to inode |
1264 | * @fattr - updated attributes | |
1265 | * | |
1266 | * Verifies the attribute cache. If we have just changed the attributes, | |
1267 | * so that fattr carries weak cache consistency data, then it may | |
1268 | * also update the ctime/mtime/change_attribute. | |
1269 | */ | |
33801147 | 1270 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1271 | { |
1272 | struct nfs_inode *nfsi = NFS_I(inode); | |
1273 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1274 | unsigned long invalid = 0; |
1da177e4 | 1275 | |
dc59250c | 1276 | |
01da47bd TM |
1277 | if (nfs_have_delegated_attributes(inode)) |
1278 | return 0; | |
ca62b9c3 | 1279 | /* Has the inode gone and changed behind our back? */ |
9e6e70f8 TM |
1280 | if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid) |
1281 | return -EIO; | |
1282 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) | |
ca62b9c3 | 1283 | return -EIO; |
ca62b9c3 | 1284 | |
651b0e70 | 1285 | if (!nfs_file_has_buffered_writers(nfsi)) { |
ca0daa27 TM |
1286 | /* Verify a few of the more important attributes */ |
1287 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && inode->i_version != fattr->change_attr) | |
1288 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_REVAL_PAGECACHE; | |
1da177e4 | 1289 | |
ca0daa27 TM |
1290 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime)) |
1291 | invalid |= NFS_INO_INVALID_ATTR; | |
ca62b9c3 | 1292 | |
ca0daa27 TM |
1293 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&inode->i_ctime, &fattr->ctime)) |
1294 | invalid |= NFS_INO_INVALID_ATTR; | |
1295 | ||
1296 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { | |
1297 | cur_size = i_size_read(inode); | |
1298 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1299 | if (cur_size != new_isize) | |
1300 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE; | |
1301 | } | |
9e6e70f8 | 1302 | } |
1da177e4 LT |
1303 | |
1304 | /* Have any file permissions changed? */ | |
9e6e70f8 TM |
1305 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
1306 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; | |
9ff593c4 | 1307 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
9e6e70f8 | 1308 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
9ff593c4 | 1309 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
2a3f5fd4 | 1310 | invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL; |
1da177e4 LT |
1311 | |
1312 | /* Has the link count changed? */ | |
9e6e70f8 | 1313 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
2a3f5fd4 | 1314 | invalid |= NFS_INO_INVALID_ATTR; |
1da177e4 | 1315 | |
9e6e70f8 | 1316 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime)) |
2a3f5fd4 TM |
1317 | invalid |= NFS_INO_INVALID_ATIME; |
1318 | ||
1319 | if (invalid != 0) | |
6edf9609 | 1320 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1321 | |
33801147 | 1322 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1323 | return 0; |
1324 | } | |
1325 | ||
ae05f269 | 1326 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1327 | |
1328 | static unsigned long nfs_read_attr_generation_counter(void) | |
1329 | { | |
ae05f269 | 1330 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1331 | } |
1332 | ||
1333 | unsigned long nfs_inc_attr_generation_counter(void) | |
1334 | { | |
ae05f269 | 1335 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1336 | } |
3235b403 | 1337 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1338 | |
1339 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1340 | { | |
1341 | fattr->valid = 0; | |
1342 | fattr->time_start = jiffies; | |
1343 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1344 | fattr->owner_name = NULL; |
1345 | fattr->group_name = NULL; | |
4704f0e2 | 1346 | } |
ddda8e0a | 1347 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1348 | |
140e049c TM |
1349 | /** |
1350 | * nfs_fattr_set_barrier | |
1351 | * @fattr: attributes | |
1352 | * | |
1353 | * Used to set a barrier after an attribute was updated. This | |
1354 | * barrier ensures that older attributes from RPC calls that may | |
1355 | * have raced with our update cannot clobber these new values. | |
1356 | * Note that you are still responsible for ensuring that other | |
1357 | * operations which change the attribute on the server do not | |
1358 | * collide. | |
1359 | */ | |
1360 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1361 | { | |
1362 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1363 | } | |
1364 | ||
2d36bfde TM |
1365 | struct nfs_fattr *nfs_alloc_fattr(void) |
1366 | { | |
1367 | struct nfs_fattr *fattr; | |
1368 | ||
1369 | fattr = kmalloc(sizeof(*fattr), GFP_NOFS); | |
1370 | if (fattr != NULL) | |
1371 | nfs_fattr_init(fattr); | |
1372 | return fattr; | |
1373 | } | |
ddda8e0a | 1374 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde TM |
1375 | |
1376 | struct nfs_fh *nfs_alloc_fhandle(void) | |
1377 | { | |
1378 | struct nfs_fh *fh; | |
1379 | ||
1380 | fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS); | |
1381 | if (fh != NULL) | |
1382 | fh->size = 0; | |
1383 | return fh; | |
1384 | } | |
ddda8e0a | 1385 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1386 | |
e27d359e | 1387 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1388 | /* |
1389 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1390 | * in the same way that wireshark does | |
1391 | * | |
1392 | * @fh: file handle | |
1393 | * | |
1394 | * For debugging only. | |
1395 | */ | |
1396 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1397 | { | |
1398 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1399 | * not on the result */ | |
1264a2f0 | 1400 | return nfs_fhandle_hash(fh); |
d8e0539e | 1401 | } |
9e6ee76d | 1402 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1403 | |
1404 | /* | |
20d27e92 CL |
1405 | * _nfs_display_fhandle - display an NFS file handle on the console |
1406 | * | |
1407 | * @fh: file handle to display | |
1408 | * @caption: display caption | |
1409 | * | |
1410 | * For debugging only. | |
1411 | */ | |
20d27e92 CL |
1412 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1413 | { | |
1414 | unsigned short i; | |
1415 | ||
fa68a1ba | 1416 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1417 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1418 | return; | |
1419 | } | |
1420 | ||
d8e0539e WAA |
1421 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1422 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1423 | for (i = 0; i < fh->size; i += 16) { |
1424 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1425 | ||
1426 | switch ((fh->size - i - 1) >> 2) { | |
1427 | case 0: | |
1428 | printk(KERN_DEFAULT " %08x\n", | |
1429 | be32_to_cpup(pos)); | |
1430 | break; | |
1431 | case 1: | |
1432 | printk(KERN_DEFAULT " %08x %08x\n", | |
1433 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1434 | break; | |
1435 | case 2: | |
1436 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1437 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1438 | be32_to_cpup(pos + 2)); | |
1439 | break; | |
1440 | default: | |
1441 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1442 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1443 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1444 | } | |
1445 | } | |
1446 | } | |
9e6ee76d | 1447 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1448 | #endif |
1449 | ||
a10ad176 TM |
1450 | /** |
1451 | * nfs_inode_attrs_need_update - check if the inode attributes need updating | |
1452 | * @inode - pointer to inode | |
1453 | * @fattr - attributes | |
1454 | * | |
1455 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1456 | * attributes got scheduled after another call carrying updated ones. | |
1457 | * | |
1458 | * To do so, the function first assumes that a more recent ctime means | |
1459 | * that the attributes in fattr are newer, however it also attempt to | |
1460 | * catch the case where ctime either didn't change, or went backwards | |
1461 | * (if someone reset the clock on the server) by looking at whether | |
1462 | * or not this RPC call was started after the inode was last updated. | |
4704f0e2 | 1463 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 TM |
1464 | * |
1465 | * The function returns 'true' if it thinks the attributes in 'fattr' are | |
1466 | * more recent than the ones cached in the inode. | |
1467 | * | |
1468 | */ | |
1469 | static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr) | |
1470 | { | |
1471 | const struct nfs_inode *nfsi = NFS_I(inode); | |
1472 | ||
4704f0e2 | 1473 | return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 || |
4704f0e2 | 1474 | ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0); |
a10ad176 TM |
1475 | } |
1476 | ||
1477 | static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr) | |
1478 | { | |
f4ce1299 TM |
1479 | int ret; |
1480 | ||
1481 | trace_nfs_refresh_inode_enter(inode); | |
1482 | ||
a10ad176 | 1483 | if (nfs_inode_attrs_need_update(inode, fattr)) |
f4ce1299 TM |
1484 | ret = nfs_update_inode(inode, fattr); |
1485 | else | |
1486 | ret = nfs_check_inode_attributes(inode, fattr); | |
1487 | ||
1488 | trace_nfs_refresh_inode_exit(inode, ret); | |
1489 | return ret; | |
870a5be8 TM |
1490 | } |
1491 | ||
33801147 TM |
1492 | /** |
1493 | * nfs_refresh_inode - try to update the inode attribute cache | |
1494 | * @inode - pointer to inode | |
1495 | * @fattr - updated attributes | |
1496 | * | |
1497 | * Check that an RPC call that returned attributes has not overlapped with | |
1498 | * other recent updates of the inode metadata, then decide whether it is | |
1499 | * safe to do a full update of the inode attributes, or whether just to | |
1500 | * call nfs_check_inode_attributes. | |
1501 | */ | |
1502 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1503 | { | |
33801147 TM |
1504 | int status; |
1505 | ||
1506 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1507 | return 0; | |
1508 | spin_lock(&inode->i_lock); | |
870a5be8 | 1509 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1510 | spin_unlock(&inode->i_lock); |
ef79c097 | 1511 | |
33801147 TM |
1512 | return status; |
1513 | } | |
ddda8e0a | 1514 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1515 | |
d65f557f TM |
1516 | static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr) |
1517 | { | |
ca0daa27 | 1518 | unsigned long invalid = NFS_INO_INVALID_ATTR; |
d65f557f | 1519 | |
aaae3f00 TM |
1520 | /* |
1521 | * Don't revalidate the pagecache if we hold a delegation, but do | |
1522 | * force an attribute update | |
1523 | */ | |
1524 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) | |
1525 | invalid = NFS_INO_INVALID_ATTR|NFS_INO_REVAL_FORCED; | |
1526 | ||
6edf9609 TM |
1527 | if (S_ISDIR(inode->i_mode)) |
1528 | invalid |= NFS_INO_INVALID_DATA; | |
1529 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1530 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1531 | return 0; | |
1532 | return nfs_refresh_inode_locked(inode, fattr); | |
1533 | } | |
1534 | ||
decf491f TM |
1535 | /** |
1536 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
1537 | * @inode - pointer to inode | |
1538 | * @fattr - updated attributes | |
1539 | * | |
1540 | * After an operation that has changed the inode metadata, mark the | |
1541 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1542 | * |
1543 | * NB: if the server didn't return any post op attributes, this | |
1544 | * function will force the retrieval of attributes before the next | |
1545 | * NFS request. Thus it should be used only for operations that | |
1546 | * are expected to change one or more attributes, to avoid | |
1547 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1548 | */ |
1549 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1550 | { | |
d65f557f | 1551 | int status; |
decf491f | 1552 | |
7668fdbe | 1553 | spin_lock(&inode->i_lock); |
92d64e47 | 1554 | nfs_fattr_set_barrier(fattr); |
d65f557f | 1555 | status = nfs_post_op_update_inode_locked(inode, fattr); |
7668fdbe | 1556 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1557 | |
870a5be8 | 1558 | return status; |
decf491f | 1559 | } |
1c606fb7 | 1560 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1561 | |
70ca8852 | 1562 | /** |
a08a8cd3 | 1563 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
70ca8852 TM |
1564 | * @inode - pointer to inode |
1565 | * @fattr - updated attributes | |
1566 | * | |
1567 | * After an operation that has changed the inode metadata, mark the | |
1568 | * attribute cache as being invalid, then try to update it. Fake up | |
1569 | * weak cache consistency data, if none exist. | |
1570 | * | |
1571 | * This function is mainly designed to be used by the ->write_done() functions. | |
1572 | */ | |
a08a8cd3 | 1573 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1574 | { |
d65f557f TM |
1575 | int status; |
1576 | ||
d65f557f TM |
1577 | /* Don't do a WCC update if these attributes are already stale */ |
1578 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || | |
1579 | !nfs_inode_attrs_need_update(inode, fattr)) { | |
9e6e70f8 TM |
1580 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1581 | | NFS_ATTR_FATTR_PRESIZE | |
1582 | | NFS_ATTR_FATTR_PREMTIME | |
1583 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1584 | goto out_noforce; |
1585 | } | |
9e6e70f8 TM |
1586 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1587 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
a9a4a87a | 1588 | fattr->pre_change_attr = inode->i_version; |
9e6e70f8 | 1589 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1590 | } |
9e6e70f8 TM |
1591 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1592 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
70ca8852 | 1593 | memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime)); |
9e6e70f8 TM |
1594 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1595 | } | |
1596 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1597 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
70ca8852 | 1598 | memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime)); |
9e6e70f8 TM |
1599 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1600 | } | |
1601 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1602 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1603 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1604 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1605 | } |
d65f557f TM |
1606 | out_noforce: |
1607 | status = nfs_post_op_update_inode_locked(inode, fattr); | |
a08a8cd3 TM |
1608 | return status; |
1609 | } | |
1610 | ||
1611 | /** | |
1612 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
1613 | * @inode - pointer to inode | |
1614 | * @fattr - updated attributes | |
1615 | * | |
1616 | * After an operation that has changed the inode metadata, mark the | |
1617 | * attribute cache as being invalid, then try to update it. Fake up | |
1618 | * weak cache consistency data, if none exist. | |
1619 | * | |
1620 | * This function is mainly designed to be used by the ->write_done() functions. | |
1621 | */ | |
1622 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1623 | { | |
1624 | int status; | |
1625 | ||
1626 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1627 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1628 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1629 | spin_unlock(&inode->i_lock); |
1630 | return status; | |
70ca8852 | 1631 | } |
ddda8e0a | 1632 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1633 | |
ea96d1ec AS |
1634 | |
1635 | static inline bool nfs_fileid_valid(struct nfs_inode *nfsi, | |
1636 | struct nfs_fattr *fattr) | |
1637 | { | |
1638 | bool ret1 = true, ret2 = true; | |
1639 | ||
1640 | if (fattr->valid & NFS_ATTR_FATTR_FILEID) | |
1641 | ret1 = (nfsi->fileid == fattr->fileid); | |
1642 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1643 | ret2 = (nfsi->fileid == fattr->mounted_on_fileid); | |
1644 | return ret1 || ret2; | |
1645 | } | |
1646 | ||
1da177e4 LT |
1647 | /* |
1648 | * Many nfs protocol calls return the new file attributes after | |
1649 | * an operation. Here we update the inode to reflect the state | |
1650 | * of the server's inode. | |
1651 | * | |
1652 | * This is a bit tricky because we have to make sure all dirty pages | |
1653 | * have been sent off to the server before calling invalidate_inode_pages. | |
1654 | * To make sure no other process adds more write requests while we try | |
1655 | * our best to flush them, we make them sleep during the attribute refresh. | |
1656 | * | |
1657 | * A very similar scenario holds for the dir cache. | |
1658 | */ | |
24aa1fe6 | 1659 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1660 | { |
8b4bdcf8 | 1661 | struct nfs_server *server; |
1da177e4 | 1662 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1663 | loff_t cur_isize, new_isize; |
2a3f5fd4 | 1664 | unsigned long invalid = 0; |
3e7d950a | 1665 | unsigned long now = jiffies; |
62ab460c | 1666 | unsigned long save_cache_validity; |
651b0e70 | 1667 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
944171cb | 1668 | bool cache_revalidated = true; |
1da177e4 | 1669 | |
1e8968c5 | 1670 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 1671 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 1672 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
1673 | atomic_read(&inode->i_count), fattr->valid); |
1674 | ||
ea96d1ec | 1675 | if (!nfs_fileid_valid(nfsi, fattr)) { |
e73e6c9e MT |
1676 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
1677 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
1678 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
1679 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
1680 | (long long)fattr->fileid); | |
1681 | goto out_err; | |
1682 | } | |
1da177e4 LT |
1683 | |
1684 | /* | |
1685 | * Make sure the inode's type hasn't changed. | |
1686 | */ | |
e73e6c9e MT |
1687 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) { |
1688 | /* | |
1689 | * Big trouble! The inode has become a different object. | |
1690 | */ | |
1e8968c5 | 1691 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
1692 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
1693 | goto out_err; | |
1694 | } | |
1da177e4 | 1695 | |
8b4bdcf8 | 1696 | server = NFS_SERVER(inode); |
a0356862 | 1697 | /* Update the fsid? */ |
9e6e70f8 | 1698 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 1699 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 1700 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
1701 | server->fsid = fattr->fsid; |
1702 | ||
1da177e4 LT |
1703 | /* |
1704 | * Update the read time so we don't revalidate too often. | |
1705 | */ | |
33801147 | 1706 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 1707 | |
62ab460c TM |
1708 | save_cache_validity = nfsi->cache_validity; |
1709 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
1710 | | NFS_INO_INVALID_ATIME | |
1711 | | NFS_INO_REVAL_FORCED | |
1712 | | NFS_INO_REVAL_PAGECACHE); | |
1da177e4 | 1713 | |
a895b4a1 | 1714 | /* Do atomic weak cache consistency updates */ |
27dc1cd3 | 1715 | invalid |= nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 1716 | |
944171cb BC |
1717 | if (pnfs_layoutcommit_outstanding(inode)) { |
1718 | nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR; | |
1719 | cache_revalidated = false; | |
1720 | } | |
10b7e9ad | 1721 | |
47aabaa7 | 1722 | /* More cache consistency checks */ |
9e6e70f8 | 1723 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
a9a4a87a | 1724 | if (inode->i_version != fattr->change_attr) { |
9e6e70f8 TM |
1725 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
1726 | inode->i_sb->s_id, inode->i_ino); | |
38512aa9 | 1727 | /* Could it be a race with writeback? */ |
ca0daa27 | 1728 | if (!have_writers) { |
38512aa9 TM |
1729 | invalid |= NFS_INO_INVALID_ATTR |
1730 | | NFS_INO_INVALID_DATA | |
1731 | | NFS_INO_INVALID_ACCESS | |
1732 | | NFS_INO_INVALID_ACL; | |
1733 | if (S_ISDIR(inode->i_mode)) | |
1734 | nfs_force_lookup_revalidate(inode); | |
1735 | } | |
a9a4a87a | 1736 | inode->i_version = fattr->change_attr; |
9e6e70f8 | 1737 | } |
ade14a7d | 1738 | } else { |
43b6535e | 1739 | nfsi->cache_validity |= save_cache_validity; |
ade14a7d TM |
1740 | cache_revalidated = false; |
1741 | } | |
9e6e70f8 TM |
1742 | |
1743 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) { | |
fee7fe19 | 1744 | memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime)); |
ade14a7d | 1745 | } else if (server->caps & NFS_CAP_MTIME) { |
43b6535e TM |
1746 | nfsi->cache_validity |= save_cache_validity & |
1747 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1748 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1749 | cache_revalidated = false; |
1750 | } | |
62ab460c | 1751 | |
9e6e70f8 | 1752 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) { |
fee7fe19 | 1753 | memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime)); |
ade14a7d | 1754 | } else if (server->caps & NFS_CAP_CTIME) { |
43b6535e TM |
1755 | nfsi->cache_validity |= save_cache_validity & |
1756 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1757 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1758 | cache_revalidated = false; |
1759 | } | |
47aabaa7 | 1760 | |
951a143b | 1761 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
1762 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
1763 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1764 | cur_isize = i_size_read(inode); | |
1765 | if (new_isize != cur_isize) { | |
1766 | /* Do we perhaps have any outstanding writes, or has | |
1767 | * the file grown beyond our last write? */ | |
ca0daa27 | 1768 | if (nfsi->nrequests == 0 || new_isize > cur_isize) { |
9e6e70f8 | 1769 | i_size_write(inode, new_isize); |
ca0daa27 TM |
1770 | if (!have_writers) |
1771 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA; | |
9e6e70f8 | 1772 | } |
60c16ea8 HJ |
1773 | dprintk("NFS: isize change on server for file %s/%ld " |
1774 | "(%Ld to %Ld)\n", | |
1775 | inode->i_sb->s_id, | |
1776 | inode->i_ino, | |
1777 | (long long)cur_isize, | |
1778 | (long long)new_isize); | |
1da177e4 | 1779 | } |
ade14a7d | 1780 | } else { |
43b6535e TM |
1781 | nfsi->cache_validity |= save_cache_validity & |
1782 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1783 | | NFS_INO_REVAL_PAGECACHE |
1784 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1785 | cache_revalidated = false; |
1786 | } | |
1da177e4 | 1787 | |
1da177e4 | 1788 | |
9e6e70f8 TM |
1789 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
1790 | memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime)); | |
ade14a7d | 1791 | else if (server->caps & NFS_CAP_ATIME) { |
43b6535e TM |
1792 | nfsi->cache_validity |= save_cache_validity & |
1793 | (NFS_INO_INVALID_ATIME | |
62ab460c | 1794 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1795 | cache_revalidated = false; |
1796 | } | |
1da177e4 | 1797 | |
9e6e70f8 TM |
1798 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
1799 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
1800 | umode_t newmode = inode->i_mode & S_IFMT; |
1801 | newmode |= fattr->mode & S_IALLUGO; | |
1802 | inode->i_mode = newmode; | |
9e6e70f8 | 1803 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
9e6e70f8 | 1804 | } |
ade14a7d | 1805 | } else if (server->caps & NFS_CAP_MODE) { |
43b6535e TM |
1806 | nfsi->cache_validity |= save_cache_validity & |
1807 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1808 | | NFS_INO_INVALID_ACCESS |
1809 | | NFS_INO_INVALID_ACL | |
1810 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1811 | cache_revalidated = false; |
1812 | } | |
62ab460c | 1813 | |
9e6e70f8 | 1814 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 1815 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
9e6e70f8 TM |
1816 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1817 | inode->i_uid = fattr->uid; | |
1818 | } | |
ade14a7d | 1819 | } else if (server->caps & NFS_CAP_OWNER) { |
43b6535e TM |
1820 | nfsi->cache_validity |= save_cache_validity & |
1821 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1822 | | NFS_INO_INVALID_ACCESS |
1823 | | NFS_INO_INVALID_ACL | |
1824 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1825 | cache_revalidated = false; |
1826 | } | |
62ab460c | 1827 | |
9e6e70f8 | 1828 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 1829 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
9e6e70f8 TM |
1830 | invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL; |
1831 | inode->i_gid = fattr->gid; | |
1832 | } | |
ade14a7d | 1833 | } else if (server->caps & NFS_CAP_OWNER_GROUP) { |
43b6535e TM |
1834 | nfsi->cache_validity |= save_cache_validity & |
1835 | (NFS_INO_INVALID_ATTR | |
62ab460c TM |
1836 | | NFS_INO_INVALID_ACCESS |
1837 | | NFS_INO_INVALID_ACL | |
1838 | | NFS_INO_REVAL_FORCED); | |
ade14a7d TM |
1839 | cache_revalidated = false; |
1840 | } | |
921615f1 | 1841 | |
9e6e70f8 TM |
1842 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
1843 | if (inode->i_nlink != fattr->nlink) { | |
1844 | invalid |= NFS_INO_INVALID_ATTR; | |
1845 | if (S_ISDIR(inode->i_mode)) | |
1846 | invalid |= NFS_INO_INVALID_DATA; | |
bfe86848 | 1847 | set_nlink(inode, fattr->nlink); |
9e6e70f8 | 1848 | } |
ade14a7d | 1849 | } else if (server->caps & NFS_CAP_NLINK) { |
43b6535e TM |
1850 | nfsi->cache_validity |= save_cache_validity & |
1851 | (NFS_INO_INVALID_ATTR | |
62ab460c | 1852 | | NFS_INO_REVAL_FORCED); |
ade14a7d TM |
1853 | cache_revalidated = false; |
1854 | } | |
1da177e4 | 1855 | |
9e6e70f8 | 1856 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
1857 | /* |
1858 | * report the blocks in 512byte units | |
1859 | */ | |
1860 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ade14a7d | 1861 | } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 1862 | inode->i_blocks = fattr->du.nfs2.blocks; |
ade14a7d TM |
1863 | else |
1864 | cache_revalidated = false; | |
1da177e4 LT |
1865 | |
1866 | /* Update attrtimeo value if we're out of the unstable period */ | |
fd1defc2 | 1867 | if (invalid & NFS_INO_INVALID_ATTR) { |
91d5b470 | 1868 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 1869 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 1870 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 1871 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 1872 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 1873 | } else { |
ade14a7d TM |
1874 | if (cache_revalidated) { |
1875 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
1876 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
1877 | nfsi->attrtimeo <<= 1; | |
1878 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
1879 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
1880 | } | |
6d2b2966 TM |
1881 | nfsi->attrtimeo_timestamp = now; |
1882 | } | |
f5062003 TM |
1883 | /* Set the barrier to be more recent than this fattr */ |
1884 | if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0) | |
1885 | nfsi->attr_gencount = fattr->gencount; | |
1da177e4 | 1886 | } |
c812012f JL |
1887 | |
1888 | /* Don't declare attrcache up to date if there were no attrs! */ | |
ade14a7d | 1889 | if (cache_revalidated) |
c812012f JL |
1890 | invalid &= ~NFS_INO_INVALID_ATTR; |
1891 | ||
1da177e4 LT |
1892 | /* Don't invalidate the data if we were to blame */ |
1893 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
1894 | || S_ISLNK(inode->i_mode))) | |
1895 | invalid &= ~NFS_INO_INVALID_DATA; | |
011e2a7f | 1896 | if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) || |
62ab460c | 1897 | (save_cache_validity & NFS_INO_REVAL_FORCED)) |
6edf9609 | 1898 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 1899 | |
1da177e4 | 1900 | return 0; |
b37b03b7 | 1901 | out_err: |
1da177e4 LT |
1902 | /* |
1903 | * No need to worry about unhashing the dentry, as the | |
1904 | * lookup validation will know that the inode is bad. | |
1905 | * (But we fall through to invalidate the caches.) | |
1906 | */ | |
1907 | nfs_invalidate_inode(inode); | |
1da177e4 LT |
1908 | return -ESTALE; |
1909 | } | |
1910 | ||
f7b422b1 | 1911 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
1912 | { |
1913 | struct nfs_inode *nfsi; | |
c456aacf | 1914 | nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
1915 | if (!nfsi) |
1916 | return NULL; | |
55296809 CL |
1917 | nfsi->flags = 0UL; |
1918 | nfsi->cache_validity = 0UL; | |
89d77c8f | 1919 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
1920 | nfsi->nfs4_acl = NULL; |
1921 | #endif /* CONFIG_NFS_V4 */ | |
1da177e4 LT |
1922 | return &nfsi->vfs_inode; |
1923 | } | |
89d77c8f | 1924 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 1925 | |
fa0d7e3d | 1926 | static void nfs_i_callback(struct rcu_head *head) |
1da177e4 | 1927 | { |
fa0d7e3d | 1928 | struct inode *inode = container_of(head, struct inode, i_rcu); |
1da177e4 LT |
1929 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); |
1930 | } | |
1931 | ||
fa0d7e3d NP |
1932 | void nfs_destroy_inode(struct inode *inode) |
1933 | { | |
1934 | call_rcu(&inode->i_rcu, nfs_i_callback); | |
1935 | } | |
89d77c8f | 1936 | EXPORT_SYMBOL_GPL(nfs_destroy_inode); |
fa0d7e3d | 1937 | |
d75d5414 AM |
1938 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
1939 | { | |
89d77c8f | 1940 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
1941 | INIT_LIST_HEAD(&nfsi->open_states); |
1942 | nfsi->delegation = NULL; | |
d75d5414 | 1943 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 1944 | nfsi->layout = NULL; |
d75d5414 AM |
1945 | #endif |
1946 | } | |
f7b422b1 | 1947 | |
51cc5068 | 1948 | static void init_once(void *foo) |
1da177e4 LT |
1949 | { |
1950 | struct nfs_inode *nfsi = (struct nfs_inode *) foo; | |
1951 | ||
a35afb83 | 1952 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
1953 | INIT_LIST_HEAD(&nfsi->open_files); |
1954 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
1955 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
ea2cf228 | 1956 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
cb1410c7 | 1957 | nfsi->nrequests = 0; |
ea2cf228 | 1958 | nfsi->commit_info.ncommit = 0; |
1a0de48a | 1959 | atomic_set(&nfsi->commit_info.rpcs_out, 0); |
884be175 | 1960 | init_rwsem(&nfsi->rmdir_sem); |
a35afb83 | 1961 | nfs4_init_once(nfsi); |
1da177e4 | 1962 | } |
20c2df83 | 1963 | |
f7b422b1 | 1964 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
1965 | { |
1966 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
1967 | sizeof(struct nfs_inode), | |
fffb60f9 | 1968 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 1969 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 1970 | init_once); |
1da177e4 LT |
1971 | if (nfs_inode_cachep == NULL) |
1972 | return -ENOMEM; | |
1973 | ||
1974 | return 0; | |
1975 | } | |
1976 | ||
266bee88 | 1977 | static void nfs_destroy_inodecache(void) |
1da177e4 | 1978 | { |
8c0a8537 KS |
1979 | /* |
1980 | * Make sure all delayed rcu free inodes are flushed before we | |
1981 | * destroy cache. | |
1982 | */ | |
1983 | rcu_barrier(); | |
1a1d92c1 | 1984 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
1985 | } |
1986 | ||
5746006f | 1987 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 1988 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
1989 | |
1990 | /* | |
1991 | * start up the nfsiod workqueue | |
1992 | */ | |
1993 | static int nfsiod_start(void) | |
1994 | { | |
1995 | struct workqueue_struct *wq; | |
1996 | dprintk("RPC: creating workqueue nfsiod\n"); | |
ada609ee | 1997 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0); |
5746006f TM |
1998 | if (wq == NULL) |
1999 | return -ENOMEM; | |
2000 | nfsiod_workqueue = wq; | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | /* | |
2005 | * Destroy the nfsiod workqueue | |
2006 | */ | |
2007 | static void nfsiod_stop(void) | |
2008 | { | |
2009 | struct workqueue_struct *wq; | |
2010 | ||
2011 | wq = nfsiod_workqueue; | |
2012 | if (wq == NULL) | |
2013 | return; | |
2014 | nfsiod_workqueue = NULL; | |
2015 | destroy_workqueue(wq); | |
2016 | } | |
2017 | ||
1b340d01 | 2018 | int nfs_net_id; |
9e2e74db | 2019 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2020 | |
2021 | static int nfs_net_init(struct net *net) | |
2022 | { | |
6b13168b | 2023 | nfs_clients_init(net); |
65b38851 | 2024 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2025 | } |
2026 | ||
2027 | static void nfs_net_exit(struct net *net) | |
2028 | { | |
65b38851 | 2029 | nfs_fs_proc_net_exit(net); |
28cd1b3f | 2030 | nfs_cleanup_cb_ident_idr(net); |
1b340d01 SK |
2031 | } |
2032 | ||
2033 | static struct pernet_operations nfs_net_ops = { | |
2034 | .init = nfs_net_init, | |
2035 | .exit = nfs_net_exit, | |
2036 | .id = &nfs_net_id, | |
2037 | .size = sizeof(struct nfs_net), | |
2038 | }; | |
2039 | ||
1da177e4 LT |
2040 | /* |
2041 | * Initialize NFS | |
2042 | */ | |
2043 | static int __init init_nfs_fs(void) | |
2044 | { | |
2045 | int err; | |
2046 | ||
1b340d01 | 2047 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2048 | if (err < 0) |
89d77c8f | 2049 | goto out9; |
e571cbf1 | 2050 | |
8ec442ae DH |
2051 | err = nfs_fscache_register(); |
2052 | if (err < 0) | |
89d77c8f | 2053 | goto out8; |
8ec442ae | 2054 | |
5746006f TM |
2055 | err = nfsiod_start(); |
2056 | if (err) | |
89d77c8f | 2057 | goto out7; |
5746006f | 2058 | |
6aaca566 DH |
2059 | err = nfs_fs_proc_init(); |
2060 | if (err) | |
89d77c8f | 2061 | goto out6; |
6aaca566 | 2062 | |
1da177e4 LT |
2063 | err = nfs_init_nfspagecache(); |
2064 | if (err) | |
89d77c8f | 2065 | goto out5; |
1da177e4 LT |
2066 | |
2067 | err = nfs_init_inodecache(); | |
2068 | if (err) | |
89d77c8f | 2069 | goto out4; |
1da177e4 LT |
2070 | |
2071 | err = nfs_init_readpagecache(); | |
2072 | if (err) | |
89d77c8f | 2073 | goto out3; |
1da177e4 LT |
2074 | |
2075 | err = nfs_init_writepagecache(); | |
2076 | if (err) | |
89d77c8f | 2077 | goto out2; |
1da177e4 | 2078 | |
1da177e4 LT |
2079 | err = nfs_init_directcache(); |
2080 | if (err) | |
89d77c8f | 2081 | goto out1; |
1da177e4 | 2082 | |
ec7652aa | 2083 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2084 | |
2085 | err = register_nfs_fs(); | |
2086 | if (err) | |
129d1977 BS |
2087 | goto out0; |
2088 | ||
1da177e4 | 2089 | return 0; |
129d1977 | 2090 | out0: |
ec7652aa | 2091 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2092 | nfs_destroy_directcache(); |
89d77c8f | 2093 | out1: |
129d1977 | 2094 | nfs_destroy_writepagecache(); |
89d77c8f | 2095 | out2: |
129d1977 | 2096 | nfs_destroy_readpagecache(); |
89d77c8f | 2097 | out3: |
129d1977 | 2098 | nfs_destroy_inodecache(); |
89d77c8f | 2099 | out4: |
129d1977 | 2100 | nfs_destroy_nfspagecache(); |
89d77c8f | 2101 | out5: |
129d1977 | 2102 | nfs_fs_proc_exit(); |
89d77c8f | 2103 | out6: |
129d1977 | 2104 | nfsiod_stop(); |
89d77c8f | 2105 | out7: |
129d1977 | 2106 | nfs_fscache_unregister(); |
89d77c8f | 2107 | out8: |
129d1977 | 2108 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2109 | out9: |
1da177e4 LT |
2110 | return err; |
2111 | } | |
2112 | ||
2113 | static void __exit exit_nfs_fs(void) | |
2114 | { | |
1da177e4 | 2115 | nfs_destroy_directcache(); |
1da177e4 LT |
2116 | nfs_destroy_writepagecache(); |
2117 | nfs_destroy_readpagecache(); | |
2118 | nfs_destroy_inodecache(); | |
2119 | nfs_destroy_nfspagecache(); | |
8ec442ae | 2120 | nfs_fscache_unregister(); |
1b340d01 | 2121 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2122 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2123 | unregister_nfs_fs(); |
6aaca566 | 2124 | nfs_fs_proc_exit(); |
5746006f | 2125 | nfsiod_stop(); |
1da177e4 LT |
2126 | } |
2127 | ||
2128 | /* Not quite true; I just maintain it */ | |
2129 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2130 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2131 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2132 | |
2133 | module_init(init_nfs_fs) | |
2134 | module_exit(exit_nfs_fs) |