Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/fs/nfs/inode.c | |
4 | * | |
5 | * Copyright (C) 1992 Rick Sladkey | |
6 | * | |
7 | * nfs inode and superblock handling functions | |
8 | * | |
526719ba | 9 | * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some |
1da177e4 LT |
10 | * experimental NFS changes. Modularisation taken straight from SYS5 fs. |
11 | * | |
12 | * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts. | |
13 | * J.S.Peatfield@damtp.cam.ac.uk | |
14 | * | |
15 | */ | |
16 | ||
1da177e4 LT |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> | |
174cd4b1 | 19 | #include <linux/sched/signal.h> |
1da177e4 LT |
20 | #include <linux/time.h> |
21 | #include <linux/kernel.h> | |
22 | #include <linux/mm.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/stat.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/unistd.h> | |
27 | #include <linux/sunrpc/clnt.h> | |
28 | #include <linux/sunrpc/stats.h> | |
4ece3a2d | 29 | #include <linux/sunrpc/metrics.h> |
1da177e4 LT |
30 | #include <linux/nfs_fs.h> |
31 | #include <linux/nfs_mount.h> | |
32 | #include <linux/nfs4_mount.h> | |
33 | #include <linux/lockd/bind.h> | |
1da177e4 LT |
34 | #include <linux/seq_file.h> |
35 | #include <linux/mount.h> | |
1da177e4 | 36 | #include <linux/vfs.h> |
9cdb3883 MN |
37 | #include <linux/inet.h> |
38 | #include <linux/nfs_xdr.h> | |
5a0e3ad6 | 39 | #include <linux/slab.h> |
3fa0b4e2 | 40 | #include <linux/compat.h> |
d310310c | 41 | #include <linux/freezer.h> |
7c0f6ba6 | 42 | #include <linux/uaccess.h> |
1eb5d98f | 43 | #include <linux/iversion.h> |
1da177e4 | 44 | |
4ce79717 | 45 | #include "nfs4_fs.h" |
a72b4422 | 46 | #include "callback.h" |
1da177e4 | 47 | #include "delegation.h" |
d9ef5a8c | 48 | #include "iostat.h" |
f7b422b1 | 49 | #include "internal.h" |
8ec442ae | 50 | #include "fscache.h" |
e5e94017 | 51 | #include "pnfs.h" |
ab7017a3 | 52 | #include "nfs.h" |
1b340d01 | 53 | #include "netns.h" |
996bc4f4 | 54 | #include "sysfs.h" |
1da177e4 | 55 | |
f4ce1299 TM |
56 | #include "nfstrace.h" |
57 | ||
1da177e4 | 58 | #define NFSDBG_FACILITY NFSDBG_VFS |
1da177e4 | 59 | |
f43bf0be TM |
60 | #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1 |
61 | ||
62 | /* Default is to see 64-bit inode numbers */ | |
90ab5ee9 | 63 | static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED; |
f43bf0be | 64 | |
24aa1fe6 | 65 | static int nfs_update_inode(struct inode *, struct nfs_fattr *); |
1da177e4 | 66 | |
e18b890b | 67 | static struct kmem_cache * nfs_inode_cachep; |
b7fa0554 | 68 | |
1da177e4 LT |
69 | static inline unsigned long |
70 | nfs_fattr_to_ino_t(struct nfs_fattr *fattr) | |
71 | { | |
72 | return nfs_fileid_to_ino_t(fattr->fileid); | |
73 | } | |
74 | ||
f5d39b02 | 75 | int nfs_wait_bit_killable(struct wait_bit_key *key, int mode) |
72cb77f4 | 76 | { |
f5d39b02 | 77 | schedule(); |
dfd01f02 PZ |
78 | if (signal_pending_state(mode, current)) |
79 | return -ERESTARTSYS; | |
72cb77f4 TM |
80 | return 0; |
81 | } | |
89d77c8f | 82 | EXPORT_SYMBOL_GPL(nfs_wait_bit_killable); |
72cb77f4 | 83 | |
f43bf0be TM |
84 | /** |
85 | * nfs_compat_user_ino64 - returns the user-visible inode number | |
86 | * @fileid: 64-bit fileid | |
87 | * | |
88 | * This function returns a 32-bit inode number if the boot parameter | |
89 | * nfs.enable_ino64 is zero. | |
90 | */ | |
91 | u64 nfs_compat_user_ino64(u64 fileid) | |
92 | { | |
3fa0b4e2 FF |
93 | #ifdef CONFIG_COMPAT |
94 | compat_ulong_t ino; | |
95 | #else | |
96 | unsigned long ino; | |
97 | #endif | |
f43bf0be TM |
98 | |
99 | if (enable_ino64) | |
100 | return fileid; | |
101 | ino = fileid; | |
102 | if (sizeof(ino) < sizeof(fileid)) | |
103 | ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8; | |
104 | return ino; | |
105 | } | |
106 | ||
eed99357 TM |
107 | int nfs_drop_inode(struct inode *inode) |
108 | { | |
109 | return NFS_STALE(inode) || generic_drop_inode(inode); | |
110 | } | |
111 | EXPORT_SYMBOL_GPL(nfs_drop_inode); | |
112 | ||
19d87ca3 | 113 | void nfs_clear_inode(struct inode *inode) |
1da177e4 | 114 | { |
da6d503a TM |
115 | /* |
116 | * The following should never happen... | |
117 | */ | |
f48407dd TM |
118 | WARN_ON_ONCE(nfs_have_writebacks(inode)); |
119 | WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files)); | |
ada70d94 | 120 | nfs_zap_acl_cache(inode); |
1c3c07e9 | 121 | nfs_access_zap_cache(inode); |
f1fe29b4 | 122 | nfs_fscache_clear_inode(inode); |
1da177e4 | 123 | } |
89d77c8f | 124 | EXPORT_SYMBOL_GPL(nfs_clear_inode); |
1da177e4 | 125 | |
b57922d9 AV |
126 | void nfs_evict_inode(struct inode *inode) |
127 | { | |
91b0abe3 | 128 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 129 | clear_inode(inode); |
b57922d9 AV |
130 | nfs_clear_inode(inode); |
131 | } | |
132 | ||
9e1681c2 | 133 | int nfs_sync_inode(struct inode *inode) |
4d346bea | 134 | { |
95d9f6c3 | 135 | inode_dio_wait(inode); |
4d346bea TM |
136 | return nfs_wb_all(inode); |
137 | } | |
9e1681c2 | 138 | EXPORT_SYMBOL_GPL(nfs_sync_inode); |
4d346bea | 139 | |
29884df0 TM |
140 | /** |
141 | * nfs_sync_mapping - helper to flush all mmapped dirty data to disk | |
302fad7b | 142 | * @mapping: pointer to struct address_space |
29884df0 TM |
143 | */ |
144 | int nfs_sync_mapping(struct address_space *mapping) | |
145 | { | |
5cf95214 | 146 | int ret = 0; |
29884df0 | 147 | |
5cf95214 TM |
148 | if (mapping->nrpages != 0) { |
149 | unmap_mapping_range(mapping, 0, 0, 0); | |
150 | ret = nfs_wb_all(mapping->host); | |
151 | } | |
29884df0 TM |
152 | return ret; |
153 | } | |
154 | ||
187e593d TM |
155 | static int nfs_attribute_timeout(struct inode *inode) |
156 | { | |
157 | struct nfs_inode *nfsi = NFS_I(inode); | |
158 | ||
159 | return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo); | |
160 | } | |
161 | ||
13c0b082 TM |
162 | static bool nfs_check_cache_flags_invalid(struct inode *inode, |
163 | unsigned long flags) | |
61540bf6 TM |
164 | { |
165 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
166 | ||
61540bf6 TM |
167 | return (cache_validity & flags) != 0; |
168 | } | |
169 | ||
61540bf6 TM |
170 | bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags) |
171 | { | |
13c0b082 TM |
172 | if (nfs_check_cache_flags_invalid(inode, flags)) |
173 | return true; | |
174 | return nfs_attribute_cache_expired(inode); | |
61540bf6 | 175 | } |
95ad37f9 | 176 | EXPORT_SYMBOL_GPL(nfs_check_cache_invalid); |
61540bf6 | 177 | |
848fdd62 TM |
178 | #ifdef CONFIG_NFS_V4_2 |
179 | static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi) | |
180 | { | |
181 | return nfsi->xattr_cache != NULL; | |
182 | } | |
183 | #else | |
184 | static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi) | |
185 | { | |
186 | return false; | |
187 | } | |
188 | #endif | |
189 | ||
fd6d3fee | 190 | void nfs_set_cache_invalid(struct inode *inode, unsigned long flags) |
6edf9609 TM |
191 | { |
192 | struct nfs_inode *nfsi = NFS_I(inode); | |
3f0b3cf4 TM |
193 | bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ); |
194 | ||
195 | if (have_delegation) { | |
196 | if (!(flags & NFS_INO_REVAL_FORCED)) | |
720869eb | 197 | flags &= ~(NFS_INO_INVALID_MODE | |
cc7f2dae TM |
198 | NFS_INO_INVALID_OTHER | |
199 | NFS_INO_INVALID_XATTR); | |
200 | flags &= ~(NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE); | |
41e97b7f | 201 | } |
6edf9609 | 202 | |
848fdd62 TM |
203 | if (!nfs_has_xattr_cache(nfsi)) |
204 | flags &= ~NFS_INO_INVALID_XATTR; | |
beab450d | 205 | if (flags & NFS_INO_INVALID_DATA) |
a6b5a28e | 206 | nfs_fscache_invalidate(inode, 0); |
41e97b7f | 207 | flags &= ~NFS_INO_REVAL_FORCED; |
488796ec | 208 | |
6edf9609 | 209 | nfsi->cache_validity |= flags; |
488796ec TM |
210 | |
211 | if (inode->i_mapping->nrpages == 0) | |
212 | nfsi->cache_validity &= ~(NFS_INO_INVALID_DATA | | |
213 | NFS_INO_DATA_INVAL_DEFER); | |
214 | else if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
215 | nfsi->cache_validity &= ~NFS_INO_DATA_INVAL_DEFER; | |
93c2e5e0 | 216 | trace_nfs_set_cache_invalid(inode, 0); |
6edf9609 | 217 | } |
b6f80a2e | 218 | EXPORT_SYMBOL_GPL(nfs_set_cache_invalid); |
6edf9609 | 219 | |
1da177e4 LT |
220 | /* |
221 | * Invalidate the local caches | |
222 | */ | |
b37b03b7 | 223 | static void nfs_zap_caches_locked(struct inode *inode) |
1da177e4 LT |
224 | { |
225 | struct nfs_inode *nfsi = NFS_I(inode); | |
226 | int mode = inode->i_mode; | |
227 | ||
91d5b470 CL |
228 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
229 | ||
c7c20973 TM |
230 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
231 | nfsi->attrtimeo_timestamp = jiffies; | |
1da177e4 | 232 | |
88a6099f TM |
233 | if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) |
234 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR | | |
235 | NFS_INO_INVALID_DATA | | |
236 | NFS_INO_INVALID_ACCESS | | |
237 | NFS_INO_INVALID_ACL | | |
238 | NFS_INO_INVALID_XATTR); | |
239 | else | |
240 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR | | |
241 | NFS_INO_INVALID_ACCESS | | |
242 | NFS_INO_INVALID_ACL | | |
243 | NFS_INO_INVALID_XATTR); | |
fd1defc2 | 244 | nfs_zap_label_cache_locked(nfsi); |
b37b03b7 | 245 | } |
dc59250c | 246 | |
b37b03b7 TM |
247 | void nfs_zap_caches(struct inode *inode) |
248 | { | |
249 | spin_lock(&inode->i_lock); | |
250 | nfs_zap_caches_locked(inode); | |
dc59250c | 251 | spin_unlock(&inode->i_lock); |
ada70d94 TM |
252 | } |
253 | ||
cd9ae2b6 TM |
254 | void nfs_zap_mapping(struct inode *inode, struct address_space *mapping) |
255 | { | |
256 | if (mapping->nrpages != 0) { | |
257 | spin_lock(&inode->i_lock); | |
6edf9609 | 258 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
cd9ae2b6 TM |
259 | spin_unlock(&inode->i_lock); |
260 | } | |
261 | } | |
262 | ||
f41f7418 | 263 | void nfs_zap_acl_cache(struct inode *inode) |
ada70d94 TM |
264 | { |
265 | void (*clear_acl_cache)(struct inode *); | |
266 | ||
267 | clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache; | |
268 | if (clear_acl_cache != NULL) | |
269 | clear_acl_cache(inode); | |
dc59250c | 270 | spin_lock(&inode->i_lock); |
55296809 | 271 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL; |
dc59250c | 272 | spin_unlock(&inode->i_lock); |
1da177e4 | 273 | } |
1c606fb7 | 274 | EXPORT_SYMBOL_GPL(nfs_zap_acl_cache); |
1da177e4 | 275 | |
c4812998 TM |
276 | void nfs_invalidate_atime(struct inode *inode) |
277 | { | |
278 | spin_lock(&inode->i_lock); | |
6edf9609 | 279 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
c4812998 TM |
280 | spin_unlock(&inode->i_lock); |
281 | } | |
ddda8e0a | 282 | EXPORT_SYMBOL_GPL(nfs_invalidate_atime); |
c4812998 | 283 | |
1da177e4 | 284 | /* |
b37b03b7 TM |
285 | * Invalidate, but do not unhash, the inode. |
286 | * NB: must be called with inode->i_lock held! | |
1da177e4 | 287 | */ |
93ce4af7 | 288 | static void nfs_set_inode_stale_locked(struct inode *inode) |
1da177e4 | 289 | { |
3a10c30a | 290 | set_bit(NFS_INO_STALE, &NFS_I(inode)->flags); |
b37b03b7 | 291 | nfs_zap_caches_locked(inode); |
93ce4af7 TM |
292 | trace_nfs_set_inode_stale(inode); |
293 | } | |
294 | ||
295 | void nfs_set_inode_stale(struct inode *inode) | |
296 | { | |
297 | spin_lock(&inode->i_lock); | |
298 | nfs_set_inode_stale_locked(inode); | |
299 | spin_unlock(&inode->i_lock); | |
1da177e4 LT |
300 | } |
301 | ||
302 | struct nfs_find_desc { | |
303 | struct nfs_fh *fh; | |
304 | struct nfs_fattr *fattr; | |
305 | }; | |
306 | ||
307 | /* | |
308 | * In NFSv3 we can have 64bit inode numbers. In order to support | |
309 | * this, and re-exported directories (also seen in NFSv2) | |
310 | * we are forced to allow 2 different inodes to have the same | |
311 | * i_ino. | |
312 | */ | |
313 | static int | |
314 | nfs_find_actor(struct inode *inode, void *opaque) | |
315 | { | |
7e7ce2cc | 316 | struct nfs_find_desc *desc = opaque; |
1da177e4 LT |
317 | struct nfs_fh *fh = desc->fh; |
318 | struct nfs_fattr *fattr = desc->fattr; | |
319 | ||
320 | if (NFS_FILEID(inode) != fattr->fileid) | |
321 | return 0; | |
6e3e2c43 | 322 | if (inode_wrong_type(inode, fattr->mode)) |
f6488c9b | 323 | return 0; |
1da177e4 LT |
324 | if (nfs_compare_fh(NFS_FH(inode), fh)) |
325 | return 0; | |
326 | if (is_bad_inode(inode) || NFS_STALE(inode)) | |
327 | return 0; | |
328 | return 1; | |
329 | } | |
330 | ||
331 | static int | |
332 | nfs_init_locked(struct inode *inode, void *opaque) | |
333 | { | |
7e7ce2cc | 334 | struct nfs_find_desc *desc = opaque; |
1da177e4 LT |
335 | struct nfs_fattr *fattr = desc->fattr; |
336 | ||
99fadcd7 | 337 | set_nfs_fileid(inode, fattr->fileid); |
916ec34d | 338 | inode->i_mode = fattr->mode; |
1da177e4 LT |
339 | nfs_copy_fh(NFS_FH(inode), desc->fh); |
340 | return 0; | |
341 | } | |
342 | ||
e058f70b | 343 | #ifdef CONFIG_NFS_V4_SECURITY_LABEL |
fd1defc2 TM |
344 | static void nfs_clear_label_invalid(struct inode *inode) |
345 | { | |
346 | spin_lock(&inode->i_lock); | |
347 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL; | |
348 | spin_unlock(&inode->i_lock); | |
349 | } | |
350 | ||
dd225cb3 | 351 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr) |
aa9c2669 DQ |
352 | { |
353 | int error; | |
354 | ||
dd225cb3 | 355 | if (fattr->label == NULL) |
aa9c2669 DQ |
356 | return; |
357 | ||
aa9c2669 | 358 | if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { |
dd225cb3 AS |
359 | error = security_inode_notifysecctx(inode, fattr->label->label, |
360 | fattr->label->len); | |
aa9c2669 DQ |
361 | if (error) |
362 | printk(KERN_ERR "%s() %s %d " | |
363 | "security_inode_notifysecctx() %d\n", | |
364 | __func__, | |
dd225cb3 AS |
365 | (char *)fattr->label->label, |
366 | fattr->label->len, error); | |
fd1defc2 | 367 | nfs_clear_label_invalid(inode); |
aa9c2669 DQ |
368 | } |
369 | } | |
370 | ||
e058f70b SD |
371 | struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) |
372 | { | |
e48c81bb | 373 | struct nfs4_label *label; |
e058f70b SD |
374 | |
375 | if (!(server->caps & NFS_CAP_SECURITY_LABEL)) | |
e48c81bb | 376 | return NULL; |
e058f70b SD |
377 | |
378 | label = kzalloc(sizeof(struct nfs4_label), flags); | |
379 | if (label == NULL) | |
380 | return ERR_PTR(-ENOMEM); | |
381 | ||
382 | label->label = kzalloc(NFS4_MAXLABELLEN, flags); | |
383 | if (label->label == NULL) { | |
384 | kfree(label); | |
385 | return ERR_PTR(-ENOMEM); | |
386 | } | |
387 | label->len = NFS4_MAXLABELLEN; | |
388 | ||
389 | return label; | |
390 | } | |
391 | EXPORT_SYMBOL_GPL(nfs4_label_alloc); | |
aa9c2669 | 392 | #else |
dd225cb3 | 393 | void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr) |
aa9c2669 DQ |
394 | { |
395 | } | |
e058f70b | 396 | #endif |
aa9c2669 | 397 | EXPORT_SYMBOL_GPL(nfs_setsecurity); |
e058f70b | 398 | |
f174ff7a PT |
399 | /* Search for inode identified by fh, fileid and i_mode in inode cache. */ |
400 | struct inode * | |
401 | nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh) | |
402 | { | |
403 | struct nfs_find_desc desc = { | |
404 | .fh = fh, | |
405 | .fattr = fattr, | |
406 | }; | |
407 | struct inode *inode; | |
408 | unsigned long hash; | |
409 | ||
410 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) || | |
411 | !(fattr->valid & NFS_ATTR_FATTR_TYPE)) | |
412 | return NULL; | |
413 | ||
414 | hash = nfs_fattr_to_ino_t(fattr); | |
415 | inode = ilookup5(sb, hash, nfs_find_actor, &desc); | |
416 | ||
417 | dprintk("%s: returning %p\n", __func__, inode); | |
418 | return inode; | |
419 | } | |
420 | ||
e591b298 TM |
421 | static void nfs_inode_init_regular(struct nfs_inode *nfsi) |
422 | { | |
423 | atomic_long_set(&nfsi->nrequests, 0); | |
67f4b5dc | 424 | atomic_long_set(&nfsi->redirtied_pages, 0); |
e591b298 TM |
425 | INIT_LIST_HEAD(&nfsi->commit_info.list); |
426 | atomic_long_set(&nfsi->commit_info.ncommit, 0); | |
427 | atomic_set(&nfsi->commit_info.rpcs_out, 0); | |
428 | mutex_init(&nfsi->commit_mutex); | |
429 | } | |
430 | ||
431 | static void nfs_inode_init_dir(struct nfs_inode *nfsi) | |
432 | { | |
433 | nfsi->cache_change_attribute = 0; | |
434 | memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf)); | |
435 | init_rwsem(&nfsi->rmdir_sem); | |
436 | } | |
437 | ||
1da177e4 LT |
438 | /* |
439 | * This is our front-end to iget that looks up inodes by file handle | |
440 | * instead of inode number. | |
441 | */ | |
442 | struct inode * | |
cf7ab00a | 443 | nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr) |
1da177e4 LT |
444 | { |
445 | struct nfs_find_desc desc = { | |
446 | .fh = fh, | |
447 | .fattr = fattr | |
448 | }; | |
03f28e3a | 449 | struct inode *inode = ERR_PTR(-ENOENT); |
ce62b114 | 450 | u64 fattr_supported = NFS_SB(sb)->fattr_valid; |
1da177e4 LT |
451 | unsigned long hash; |
452 | ||
7ebb9315 BS |
453 | nfs_attr_check_mountpoint(sb, fattr); |
454 | ||
2ef47eb1 AS |
455 | if (nfs_attr_use_mounted_on_fileid(fattr)) |
456 | fattr->fileid = fattr->mounted_on_fileid; | |
457 | else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) | |
1da177e4 | 458 | goto out_no_inode; |
9e6e70f8 | 459 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0) |
1da177e4 | 460 | goto out_no_inode; |
1da177e4 LT |
461 | |
462 | hash = nfs_fattr_to_ino_t(fattr); | |
463 | ||
03f28e3a TM |
464 | inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc); |
465 | if (inode == NULL) { | |
466 | inode = ERR_PTR(-ENOMEM); | |
1da177e4 | 467 | goto out_no_inode; |
03f28e3a | 468 | } |
1da177e4 LT |
469 | |
470 | if (inode->i_state & I_NEW) { | |
471 | struct nfs_inode *nfsi = NFS_I(inode); | |
b0c4fddc | 472 | unsigned long now = jiffies; |
1da177e4 LT |
473 | |
474 | /* We set i_ino for the few things that still rely on it, | |
475 | * such as stat(2) */ | |
476 | inode->i_ino = hash; | |
477 | ||
478 | /* We can't support update_atime(), since the server will reset it */ | |
479 | inode->i_flags |= S_NOATIME|S_NOCMTIME; | |
480 | inode->i_mode = fattr->mode; | |
821a868a | 481 | nfsi->cache_validity = 0; |
62ab460c | 482 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0 |
ce62b114 | 483 | && (fattr_supported & NFS_ATTR_FATTR_MODE)) |
720869eb | 484 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE); |
1da177e4 LT |
485 | /* Why so? Because we want revalidate for devices/FIFOs, and |
486 | * that's precisely what we have in nfs_file_inode_operations. | |
487 | */ | |
8fa5c000 | 488 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops; |
1da177e4 | 489 | if (S_ISREG(inode->i_mode)) { |
1788ea6e | 490 | inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops; |
1da177e4 | 491 | inode->i_data.a_ops = &nfs_file_aops; |
e591b298 | 492 | nfs_inode_init_regular(nfsi); |
1da177e4 | 493 | } else if (S_ISDIR(inode->i_mode)) { |
8fa5c000 | 494 | inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops; |
1da177e4 | 495 | inode->i_fop = &nfs_dir_operations; |
11de3b11 | 496 | inode->i_data.a_ops = &nfs_dir_aops; |
e591b298 | 497 | nfs_inode_init_dir(nfsi); |
55a97593 | 498 | /* Deal with crossing mountpoints */ |
7ebb9315 BS |
499 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT || |
500 | fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) { | |
6b97fd3d MN |
501 | if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) |
502 | inode->i_op = &nfs_referral_inode_operations; | |
503 | else | |
504 | inode->i_op = &nfs_mountpoint_inode_operations; | |
55a97593 | 505 | inode->i_fop = NULL; |
36d43a43 | 506 | inode->i_flags |= S_AUTOMOUNT; |
55a97593 | 507 | } |
21fc61c7 | 508 | } else if (S_ISLNK(inode->i_mode)) { |
1da177e4 | 509 | inode->i_op = &nfs_symlink_inode_operations; |
21fc61c7 AV |
510 | inode_nohighmem(inode); |
511 | } else | |
1da177e4 LT |
512 | init_special_inode(inode, inode->i_mode, fattr->rdev); |
513 | ||
9e6e70f8 TM |
514 | memset(&inode->i_atime, 0, sizeof(inode->i_atime)); |
515 | memset(&inode->i_mtime, 0, sizeof(inode->i_mtime)); | |
516 | memset(&inode->i_ctime, 0, sizeof(inode->i_ctime)); | |
1eb5d98f | 517 | inode_set_iversion_raw(inode, 0); |
9e6e70f8 | 518 | inode->i_size = 0; |
6d6b77f1 | 519 | clear_nlink(inode); |
9ff593c4 EB |
520 | inode->i_uid = make_kuid(&init_user_ns, -2); |
521 | inode->i_gid = make_kgid(&init_user_ns, -2); | |
9e6e70f8 | 522 | inode->i_blocks = 0; |
2701d086 AA |
523 | nfsi->write_io = 0; |
524 | nfsi->read_io = 0; | |
9e6e70f8 | 525 | |
33801147 | 526 | nfsi->read_cache_jiffies = fattr->time_start; |
4704f0e2 | 527 | nfsi->attr_gencount = fattr->gencount; |
9e6e70f8 | 528 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
e86d5a02 | 529 | inode->i_atime = fattr->atime; |
ce62b114 | 530 | else if (fattr_supported & NFS_ATTR_FATTR_ATIME) |
16e14375 | 531 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); |
9e6e70f8 | 532 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
e86d5a02 | 533 | inode->i_mtime = fattr->mtime; |
ce62b114 | 534 | else if (fattr_supported & NFS_ATTR_FATTR_MTIME) |
16e14375 | 535 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); |
9e6e70f8 | 536 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
e86d5a02 | 537 | inode->i_ctime = fattr->ctime; |
ce62b114 | 538 | else if (fattr_supported & NFS_ATTR_FATTR_CTIME) |
16e14375 | 539 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME); |
9e6e70f8 | 540 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) |
1eb5d98f | 541 | inode_set_iversion_raw(inode, fattr->change_attr); |
cd812599 | 542 | else |
16e14375 | 543 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE); |
9e6e70f8 TM |
544 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) |
545 | inode->i_size = nfs_size_to_loff_t(fattr->size); | |
62ab460c | 546 | else |
16e14375 | 547 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE); |
9e6e70f8 | 548 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) |
bfe86848 | 549 | set_nlink(inode, fattr->nlink); |
ce62b114 | 550 | else if (fattr_supported & NFS_ATTR_FATTR_NLINK) |
fabf2b34 | 551 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_NLINK); |
9e6e70f8 TM |
552 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) |
553 | inode->i_uid = fattr->uid; | |
ce62b114 | 554 | else if (fattr_supported & NFS_ATTR_FATTR_OWNER) |
16e14375 | 555 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
556 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) |
557 | inode->i_gid = fattr->gid; | |
ce62b114 | 558 | else if (fattr_supported & NFS_ATTR_FATTR_GROUP) |
16e14375 | 559 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER); |
9e6e70f8 TM |
560 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
561 | inode->i_blocks = fattr->du.nfs2.blocks; | |
ce62b114 TM |
562 | else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED && |
563 | fattr->size != 0) | |
564 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS); | |
9e6e70f8 | 565 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
566 | /* |
567 | * report the blocks in 512byte units | |
568 | */ | |
569 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
ce62b114 TM |
570 | } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED && |
571 | fattr->size != 0) | |
4cdfeb64 | 572 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS); |
821a868a | 573 | |
dd225cb3 | 574 | nfs_setsecurity(inode, fattr); |
aa9c2669 | 575 | |
1da177e4 | 576 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
b0c4fddc | 577 | nfsi->attrtimeo_timestamp = now; |
1c3c07e9 | 578 | nfsi->access_cache = RB_ROOT; |
1da177e4 | 579 | |
f1fe29b4 | 580 | nfs_fscache_init_inode(inode); |
ef79c097 | 581 | |
1da177e4 | 582 | unlock_new_inode(inode); |
26fde4df N |
583 | } else { |
584 | int err = nfs_refresh_inode(inode, fattr); | |
585 | if (err < 0) { | |
586 | iput(inode); | |
587 | inode = ERR_PTR(err); | |
588 | goto out_no_inode; | |
589 | } | |
590 | } | |
1e8968c5 | 591 | dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n", |
1da177e4 | 592 | inode->i_sb->s_id, |
1e8968c5 | 593 | (unsigned long long)NFS_FILEID(inode), |
4f1abd22 | 594 | nfs_display_fhandle_hash(fh), |
1da177e4 LT |
595 | atomic_read(&inode->i_count)); |
596 | ||
597 | out: | |
598 | return inode; | |
599 | ||
600 | out_no_inode: | |
03f28e3a | 601 | dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode)); |
1da177e4 LT |
602 | goto out; |
603 | } | |
89d77c8f | 604 | EXPORT_SYMBOL_GPL(nfs_fhget); |
1da177e4 | 605 | |
536e43d1 | 606 | #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 |
607 | |
608 | int | |
c1632a0f | 609 | nfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
549c7297 | 610 | struct iattr *attr) |
1da177e4 | 611 | { |
2b0143b5 | 612 | struct inode *inode = d_inode(dentry); |
987f8dfc | 613 | struct nfs_fattr *fattr; |
ae57ca0f | 614 | int error = 0; |
1da177e4 | 615 | |
91d5b470 CL |
616 | nfs_inc_stats(inode, NFSIOS_VFSSETATTR); |
617 | ||
188b95dd JL |
618 | /* skip mode change if it's just for clearing setuid/setgid */ |
619 | if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID)) | |
620 | attr->ia_valid &= ~ATTR_MODE; | |
621 | ||
1da177e4 | 622 | if (attr->ia_valid & ATTR_SIZE) { |
08a899d5 CH |
623 | BUG_ON(!S_ISREG(inode->i_mode)); |
624 | ||
ae57ca0f KM |
625 | error = inode_newsize_ok(inode, attr->ia_size); |
626 | if (error) | |
627 | return error; | |
628 | ||
629 | if (attr->ia_size == i_size_read(inode)) | |
1da177e4 LT |
630 | attr->ia_valid &= ~ATTR_SIZE; |
631 | } | |
632 | ||
633 | /* Optimization: if the end result is no change, don't RPC */ | |
1f9f4328 | 634 | if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0) |
1da177e4 LT |
635 | return 0; |
636 | ||
f4ce1299 TM |
637 | trace_nfs_setattr_enter(inode); |
638 | ||
755c1e20 | 639 | /* Write all dirty data */ |
4d346bea TM |
640 | if (S_ISREG(inode->i_mode)) |
641 | nfs_sync_inode(inode); | |
987f8dfc | 642 | |
1b00ad65 | 643 | fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); |
ae57ca0f KM |
644 | if (fattr == NULL) { |
645 | error = -ENOMEM; | |
987f8dfc | 646 | goto out; |
ae57ca0f KM |
647 | } |
648 | ||
987f8dfc | 649 | error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); |
65e4308d | 650 | if (error == 0) |
aa9c2669 | 651 | error = nfs_refresh_inode(inode, fattr); |
987f8dfc TM |
652 | nfs_free_fattr(fattr); |
653 | out: | |
f4ce1299 | 654 | trace_nfs_setattr_exit(inode, error); |
65e4308d TM |
655 | return error; |
656 | } | |
ddda8e0a | 657 | EXPORT_SYMBOL_GPL(nfs_setattr); |
65e4308d | 658 | |
a3d01454 TM |
659 | /** |
660 | * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall | |
661 | * @inode: inode of the file used | |
662 | * @offset: file offset to start truncating | |
663 | * | |
664 | * This is a copy of the common vmtruncate, but with the locking | |
665 | * corrected to take into account the fact that NFS requires | |
666 | * inode->i_size to be updated under the inode->i_lock. | |
f044636d | 667 | * Note: must be called with inode->i_lock held! |
a3d01454 TM |
668 | */ |
669 | static int nfs_vmtruncate(struct inode * inode, loff_t offset) | |
670 | { | |
c08d3b0e | 671 | int err; |
a3d01454 | 672 | |
c08d3b0e | 673 | err = inode_newsize_ok(inode, offset); |
674 | if (err) | |
675 | goto out; | |
a3d01454 | 676 | |
110cb2d2 | 677 | trace_nfs_size_truncate(inode, offset); |
c08d3b0e | 678 | i_size_write(inode, offset); |
6edf9609 TM |
679 | /* Optimisation */ |
680 | if (offset == 0) | |
1c341b77 TM |
681 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA | |
682 | NFS_INO_DATA_INVAL_DEFER); | |
f6cdfa6d | 683 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE; |
c08d3b0e | 684 | |
f044636d | 685 | spin_unlock(&inode->i_lock); |
7caef267 | 686 | truncate_pagecache(inode, offset); |
f044636d | 687 | spin_lock(&inode->i_lock); |
c08d3b0e | 688 | out: |
689 | return err; | |
a3d01454 TM |
690 | } |
691 | ||
65e4308d TM |
692 | /** |
693 | * nfs_setattr_update_inode - Update inode metadata after a setattr call. | |
694 | * @inode: pointer to struct inode | |
695 | * @attr: pointer to struct iattr | |
16e14375 | 696 | * @fattr: pointer to struct nfs_fattr |
65e4308d TM |
697 | * |
698 | * Note: we do this in the *proc.c in order to ensure that | |
699 | * it works for things like exclusive creates too. | |
700 | */ | |
f044636d TM |
701 | void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr, |
702 | struct nfs_fattr *fattr) | |
65e4308d | 703 | { |
f044636d TM |
704 | /* Barrier: bump the attribute generation count. */ |
705 | nfs_fattr_set_barrier(fattr); | |
706 | ||
707 | spin_lock(&inode->i_lock); | |
708 | NFS_I(inode)->attr_gencount = fattr->gencount; | |
6a97d02d | 709 | if ((attr->ia_valid & ATTR_SIZE) != 0) { |
4cdfeb64 TM |
710 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME | |
711 | NFS_INO_INVALID_BLOCKS); | |
6a97d02d TM |
712 | nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC); |
713 | nfs_vmtruncate(inode, attr->ia_size); | |
714 | } | |
65e4308d | 715 | if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) { |
6a97d02d | 716 | NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME; |
1f9f4328 TM |
717 | if ((attr->ia_valid & ATTR_KILL_SUID) != 0 && |
718 | inode->i_mode & S_ISUID) | |
719 | inode->i_mode &= ~S_ISUID; | |
720 | if ((attr->ia_valid & ATTR_KILL_SGID) != 0 && | |
721 | (inode->i_mode & (S_ISGID | S_IXGRP)) == | |
722 | (S_ISGID | S_IXGRP)) | |
723 | inode->i_mode &= ~S_ISGID; | |
1da177e4 | 724 | if ((attr->ia_valid & ATTR_MODE) != 0) { |
65e4308d TM |
725 | int mode = attr->ia_mode & S_IALLUGO; |
726 | mode |= inode->i_mode & ~S_IALLUGO; | |
1da177e4 LT |
727 | inode->i_mode = mode; |
728 | } | |
729 | if ((attr->ia_valid & ATTR_UID) != 0) | |
730 | inode->i_uid = attr->ia_uid; | |
731 | if ((attr->ia_valid & ATTR_GID) != 0) | |
732 | inode->i_gid = attr->ia_gid; | |
6a97d02d | 733 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
e86d5a02 | 734 | inode->i_ctime = fattr->ctime; |
6a97d02d TM |
735 | else |
736 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
737 | | NFS_INO_INVALID_CTIME); | |
6edf9609 TM |
738 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS |
739 | | NFS_INO_INVALID_ACL); | |
65e4308d | 740 | } |
6a97d02d TM |
741 | if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) { |
742 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME | |
743 | | NFS_INO_INVALID_CTIME); | |
744 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) | |
e86d5a02 | 745 | inode->i_atime = fattr->atime; |
6a97d02d TM |
746 | else if (attr->ia_valid & ATTR_ATIME_SET) |
747 | inode->i_atime = attr->ia_atime; | |
748 | else | |
749 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME); | |
750 | ||
751 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
e86d5a02 | 752 | inode->i_ctime = fattr->ctime; |
6a97d02d TM |
753 | else |
754 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
755 | | NFS_INO_INVALID_CTIME); | |
756 | } | |
757 | if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) { | |
758 | NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME | |
759 | | NFS_INO_INVALID_CTIME); | |
760 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
e86d5a02 | 761 | inode->i_mtime = fattr->mtime; |
6a97d02d TM |
762 | else if (attr->ia_valid & ATTR_MTIME_SET) |
763 | inode->i_mtime = attr->ia_mtime; | |
764 | else | |
765 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME); | |
766 | ||
767 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
e86d5a02 | 768 | inode->i_ctime = fattr->ctime; |
6a97d02d TM |
769 | else |
770 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE | |
771 | | NFS_INO_INVALID_CTIME); | |
65e4308d | 772 | } |
616c3196 JL |
773 | if (fattr->valid) |
774 | nfs_update_inode(inode, fattr); | |
f044636d | 775 | spin_unlock(&inode->i_lock); |
1da177e4 | 776 | } |
ddda8e0a | 777 | EXPORT_SYMBOL_GPL(nfs_setattr_update_inode); |
1da177e4 | 778 | |
ad1e109a TM |
779 | /* |
780 | * Don't request help from readdirplus if the file is being written to, | |
781 | * or if attribute caching is turned off | |
782 | */ | |
783 | static bool nfs_getattr_readdirplus_enable(const struct inode *inode) | |
311324ad | 784 | { |
ad1e109a TM |
785 | return nfs_server_capable(inode, NFS_CAP_READDIRPLUS) && |
786 | !nfs_have_writebacks(inode) && NFS_MAXATTRTIMEO(inode) > 5 * HZ; | |
787 | } | |
311324ad | 788 | |
ad1e109a TM |
789 | static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry) |
790 | { | |
791 | if (!IS_ROOT(dentry)) { | |
792 | struct dentry *parent = dget_parent(dentry); | |
793 | nfs_readdir_record_entry_cache_miss(d_inode(parent)); | |
794 | dput(parent); | |
795 | } | |
311324ad TM |
796 | } |
797 | ||
1bcf4c5c TM |
798 | static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry) |
799 | { | |
ad1e109a TM |
800 | if (!IS_ROOT(dentry)) { |
801 | struct dentry *parent = dget_parent(dentry); | |
802 | nfs_readdir_record_entry_cache_hit(d_inode(parent)); | |
803 | dput(parent); | |
804 | } | |
1bcf4c5c TM |
805 | } |
806 | ||
63cdd7ed | 807 | static u32 nfs_get_valid_attrmask(struct inode *inode) |
311324ad | 808 | { |
63cdd7ed TM |
809 | unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); |
810 | u32 reply_mask = STATX_INO | STATX_TYPE; | |
811 | ||
812 | if (!(cache_validity & NFS_INO_INVALID_ATIME)) | |
813 | reply_mask |= STATX_ATIME; | |
13c0b082 TM |
814 | if (!(cache_validity & NFS_INO_INVALID_CTIME)) |
815 | reply_mask |= STATX_CTIME; | |
816 | if (!(cache_validity & NFS_INO_INVALID_MTIME)) | |
817 | reply_mask |= STATX_MTIME; | |
818 | if (!(cache_validity & NFS_INO_INVALID_SIZE)) | |
819 | reply_mask |= STATX_SIZE; | |
fabf2b34 TM |
820 | if (!(cache_validity & NFS_INO_INVALID_NLINK)) |
821 | reply_mask |= STATX_NLINK; | |
720869eb TM |
822 | if (!(cache_validity & NFS_INO_INVALID_MODE)) |
823 | reply_mask |= STATX_MODE; | |
63cdd7ed | 824 | if (!(cache_validity & NFS_INO_INVALID_OTHER)) |
720869eb | 825 | reply_mask |= STATX_UID | STATX_GID; |
63cdd7ed TM |
826 | if (!(cache_validity & NFS_INO_INVALID_BLOCKS)) |
827 | reply_mask |= STATX_BLOCKS; | |
61a968b4 JL |
828 | if (!(cache_validity & NFS_INO_INVALID_CHANGE)) |
829 | reply_mask |= STATX_CHANGE_COOKIE; | |
63cdd7ed | 830 | return reply_mask; |
311324ad TM |
831 | } |
832 | ||
b74d24f7 | 833 | int nfs_getattr(struct mnt_idmap *idmap, const struct path *path, |
549c7297 | 834 | struct kstat *stat, u32 request_mask, unsigned int query_flags) |
1da177e4 | 835 | { |
a528d35e | 836 | struct inode *inode = d_inode(path->dentry); |
9ccee940 TM |
837 | struct nfs_server *server = NFS_SERVER(inode); |
838 | unsigned long cache_validity; | |
16caf5b6 | 839 | int err = 0; |
9ccee940 TM |
840 | bool force_sync = query_flags & AT_STATX_FORCE_SYNC; |
841 | bool do_update = false; | |
ad1e109a | 842 | bool readdirplus_enabled = nfs_getattr_readdirplus_enable(inode); |
1da177e4 | 843 | |
f4ce1299 | 844 | trace_nfs_getattr_enter(inode); |
9ccee940 | 845 | |
4eb6a823 TM |
846 | request_mask &= STATX_TYPE | STATX_MODE | STATX_NLINK | STATX_UID | |
847 | STATX_GID | STATX_ATIME | STATX_MTIME | STATX_CTIME | | |
61a968b4 JL |
848 | STATX_INO | STATX_SIZE | STATX_BLOCKS | STATX_BTIME | |
849 | STATX_CHANGE_COOKIE; | |
4eb6a823 | 850 | |
ac7cbb22 | 851 | if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) { |
ad1e109a TM |
852 | if (readdirplus_enabled) |
853 | nfs_readdirplus_parent_cache_hit(path->dentry); | |
63cdd7ed | 854 | goto out_no_revalidate; |
ac7cbb22 | 855 | } |
9ccee940 | 856 | |
61a968b4 JL |
857 | /* Flush out writes to the server in order to update c/mtime/version. */ |
858 | if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_CHANGE_COOKIE)) && | |
d19e0183 TM |
859 | S_ISREG(inode->i_mode)) |
860 | filemap_write_and_wait(inode->i_mapping); | |
fc33a7bb CH |
861 | |
862 | /* | |
863 | * We may force a getattr if the user cares about atime. | |
864 | * | |
865 | * Note that we only have to check the vfsmount flags here: | |
866 | * - NFS always sets S_NOATIME by so checking it would give a | |
867 | * bogus result | |
1751e8a6 | 868 | * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is |
fc33a7bb CH |
869 | * no point in checking those. |
870 | */ | |
a528d35e DH |
871 | if ((path->mnt->mnt_flags & MNT_NOATIME) || |
872 | ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))) | |
9ccee940 TM |
873 | request_mask &= ~STATX_ATIME; |
874 | ||
875 | /* Is the user requesting attributes that might need revalidation? */ | |
876 | if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME| | |
877 | STATX_MTIME|STATX_UID|STATX_GID| | |
61a968b4 JL |
878 | STATX_SIZE|STATX_BLOCKS| |
879 | STATX_CHANGE_COOKIE))) | |
9ccee940 TM |
880 | goto out_no_revalidate; |
881 | ||
882 | /* Check whether the cached attributes are stale */ | |
883 | do_update |= force_sync || nfs_attribute_cache_expired(inode); | |
884 | cache_validity = READ_ONCE(NFS_I(inode)->cache_validity); | |
e8764a6f | 885 | do_update |= cache_validity & NFS_INO_INVALID_CHANGE; |
9ccee940 TM |
886 | if (request_mask & STATX_ATIME) |
887 | do_update |= cache_validity & NFS_INO_INVALID_ATIME; | |
e8764a6f TM |
888 | if (request_mask & STATX_CTIME) |
889 | do_update |= cache_validity & NFS_INO_INVALID_CTIME; | |
890 | if (request_mask & STATX_MTIME) | |
891 | do_update |= cache_validity & NFS_INO_INVALID_MTIME; | |
892 | if (request_mask & STATX_SIZE) | |
893 | do_update |= cache_validity & NFS_INO_INVALID_SIZE; | |
fabf2b34 TM |
894 | if (request_mask & STATX_NLINK) |
895 | do_update |= cache_validity & NFS_INO_INVALID_NLINK; | |
720869eb TM |
896 | if (request_mask & STATX_MODE) |
897 | do_update |= cache_validity & NFS_INO_INVALID_MODE; | |
898 | if (request_mask & (STATX_UID | STATX_GID)) | |
e8764a6f | 899 | do_update |= cache_validity & NFS_INO_INVALID_OTHER; |
3a39e778 ZB |
900 | if (request_mask & STATX_BLOCKS) |
901 | do_update |= cache_validity & NFS_INO_INVALID_BLOCKS; | |
63cdd7ed | 902 | |
9ccee940 | 903 | if (do_update) { |
ad1e109a | 904 | if (readdirplus_enabled) |
59b86d85 | 905 | nfs_readdirplus_parent_cache_miss(path->dentry); |
311324ad | 906 | err = __nfs_revalidate_inode(server, inode); |
9ccee940 TM |
907 | if (err) |
908 | goto out; | |
ad1e109a | 909 | } else if (readdirplus_enabled) |
a528d35e | 910 | nfs_readdirplus_parent_cache_hit(path->dentry); |
9ccee940 TM |
911 | out_no_revalidate: |
912 | /* Only return attributes that were revalidated. */ | |
63cdd7ed TM |
913 | stat->result_mask = nfs_get_valid_attrmask(inode) | request_mask; |
914 | ||
b74d24f7 | 915 | generic_fillattr(&nop_mnt_idmap, inode, stat); |
9ccee940 | 916 | stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode)); |
61a968b4 JL |
917 | stat->change_cookie = inode_peek_iversion_raw(inode); |
918 | stat->attributes_mask |= STATX_ATTR_CHANGE_MONOTONIC; | |
919 | if (server->change_attr_type != NFS4_CHANGE_TYPE_IS_UNDEFINED) | |
920 | stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC; | |
9ccee940 TM |
921 | if (S_ISDIR(inode->i_mode)) |
922 | stat->blksize = NFS_SERVER(inode)->dtsize; | |
acdc53b2 | 923 | out: |
f4ce1299 | 924 | trace_nfs_getattr_exit(inode, err); |
1da177e4 LT |
925 | return err; |
926 | } | |
ddda8e0a | 927 | EXPORT_SYMBOL_GPL(nfs_getattr); |
1da177e4 | 928 | |
f11ac8db TM |
929 | static void nfs_init_lock_context(struct nfs_lock_context *l_ctx) |
930 | { | |
2f62b5aa | 931 | refcount_set(&l_ctx->count, 1); |
d51fdb87 | 932 | l_ctx->lockowner = current->files; |
f11ac8db | 933 | INIT_LIST_HEAD(&l_ctx->list); |
210c7c17 | 934 | atomic_set(&l_ctx->io_count, 0); |
f11ac8db TM |
935 | } |
936 | ||
937 | static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx) | |
938 | { | |
1db97eaa | 939 | struct nfs_lock_context *pos; |
f11ac8db | 940 | |
1db97eaa | 941 | list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) { |
d51fdb87 | 942 | if (pos->lockowner != current->files) |
f11ac8db | 943 | continue; |
1db97eaa TM |
944 | if (refcount_inc_not_zero(&pos->count)) |
945 | return pos; | |
946 | } | |
f11ac8db TM |
947 | return NULL; |
948 | } | |
949 | ||
950 | struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx) | |
951 | { | |
952 | struct nfs_lock_context *res, *new = NULL; | |
2b0143b5 | 953 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 954 | |
1db97eaa | 955 | rcu_read_lock(); |
f11ac8db | 956 | res = __nfs_find_lock_context(ctx); |
1db97eaa | 957 | rcu_read_unlock(); |
f11ac8db | 958 | if (res == NULL) { |
d7867712 | 959 | new = kmalloc(sizeof(*new), GFP_KERNEL_ACCOUNT); |
f11ac8db | 960 | if (new == NULL) |
b3c54de6 | 961 | return ERR_PTR(-ENOMEM); |
f11ac8db TM |
962 | nfs_init_lock_context(new); |
963 | spin_lock(&inode->i_lock); | |
964 | res = __nfs_find_lock_context(ctx); | |
965 | if (res == NULL) { | |
15494511 TM |
966 | new->open_context = get_nfs_open_context(ctx); |
967 | if (new->open_context) { | |
968 | list_add_tail_rcu(&new->list, | |
969 | &ctx->lock_context.list); | |
970 | res = new; | |
971 | new = NULL; | |
972 | } else | |
973 | res = ERR_PTR(-EBADF); | |
f11ac8db | 974 | } |
1db97eaa TM |
975 | spin_unlock(&inode->i_lock); |
976 | kfree(new); | |
f11ac8db | 977 | } |
f11ac8db TM |
978 | return res; |
979 | } | |
1c6dcbe5 | 980 | EXPORT_SYMBOL_GPL(nfs_get_lock_context); |
f11ac8db TM |
981 | |
982 | void nfs_put_lock_context(struct nfs_lock_context *l_ctx) | |
983 | { | |
984 | struct nfs_open_context *ctx = l_ctx->open_context; | |
2b0143b5 | 985 | struct inode *inode = d_inode(ctx->dentry); |
f11ac8db | 986 | |
2f62b5aa | 987 | if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock)) |
f11ac8db | 988 | return; |
1db97eaa | 989 | list_del_rcu(&l_ctx->list); |
f11ac8db | 990 | spin_unlock(&inode->i_lock); |
15494511 | 991 | put_nfs_open_context(ctx); |
1db97eaa | 992 | kfree_rcu(l_ctx, rcu_head); |
f11ac8db | 993 | } |
1c6dcbe5 | 994 | EXPORT_SYMBOL_GPL(nfs_put_lock_context); |
f11ac8db | 995 | |
7fe5c398 TM |
996 | /** |
997 | * nfs_close_context - Common close_context() routine NFSv2/v3 | |
998 | * @ctx: pointer to context | |
999 | * @is_sync: is this a synchronous close | |
1000 | * | |
5cf9d706 TM |
1001 | * Ensure that the attributes are up to date if we're mounted |
1002 | * with close-to-open semantics and we have cached data that will | |
1003 | * need to be revalidated on open. | |
7fe5c398 TM |
1004 | */ |
1005 | void nfs_close_context(struct nfs_open_context *ctx, int is_sync) | |
1006 | { | |
5cf9d706 | 1007 | struct nfs_inode *nfsi; |
7fe5c398 | 1008 | struct inode *inode; |
7fe5c398 TM |
1009 | |
1010 | if (!(ctx->mode & FMODE_WRITE)) | |
1011 | return; | |
1012 | if (!is_sync) | |
1013 | return; | |
2b0143b5 | 1014 | inode = d_inode(ctx->dentry); |
58ff4184 TM |
1015 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
1016 | return; | |
5cf9d706 TM |
1017 | nfsi = NFS_I(inode); |
1018 | if (inode->i_mapping->nrpages == 0) | |
1019 | return; | |
1020 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
1021 | return; | |
1022 | if (!list_empty(&nfsi->open_files)) | |
7fe5c398 | 1023 | return; |
1f3208b2 | 1024 | if (NFS_SERVER(inode)->flags & NFS_MOUNT_NOCTO) |
7fe5c398 | 1025 | return; |
1f3208b2 TM |
1026 | nfs_revalidate_inode(inode, |
1027 | NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE); | |
7fe5c398 | 1028 | } |
ddda8e0a | 1029 | EXPORT_SYMBOL_GPL(nfs_close_context); |
7fe5c398 | 1030 | |
532d4def N |
1031 | struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, |
1032 | fmode_t f_mode, | |
1033 | struct file *filp) | |
1da177e4 LT |
1034 | { |
1035 | struct nfs_open_context *ctx; | |
1036 | ||
d7867712 | 1037 | ctx = kmalloc(sizeof(*ctx), GFP_KERNEL_ACCOUNT); |
1d179d6b | 1038 | if (!ctx) |
5ede7b1c | 1039 | return ERR_PTR(-ENOMEM); |
5ede7b1c AV |
1040 | nfs_sb_active(dentry->d_sb); |
1041 | ctx->dentry = dget(dentry); | |
1d179d6b TM |
1042 | if (filp) |
1043 | ctx->cred = get_cred(filp->f_cred); | |
1044 | else | |
1045 | ctx->cred = get_current_cred(); | |
ca05cbae | 1046 | rcu_assign_pointer(ctx->ll_cred, NULL); |
5ede7b1c AV |
1047 | ctx->state = NULL; |
1048 | ctx->mode = f_mode; | |
1049 | ctx->flags = 0; | |
1050 | ctx->error = 0; | |
532d4def | 1051 | ctx->flock_owner = (fl_owner_t)filp; |
5ede7b1c AV |
1052 | nfs_init_lock_context(&ctx->lock_context); |
1053 | ctx->lock_context.open_context = ctx; | |
1054 | INIT_LIST_HEAD(&ctx->list); | |
82be417a | 1055 | ctx->mdsthreshold = NULL; |
1da177e4 LT |
1056 | return ctx; |
1057 | } | |
89d77c8f | 1058 | EXPORT_SYMBOL_GPL(alloc_nfs_open_context); |
1da177e4 LT |
1059 | |
1060 | struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx) | |
1061 | { | |
0de43976 TM |
1062 | if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count)) |
1063 | return ctx; | |
1064 | return NULL; | |
1da177e4 | 1065 | } |
89d77c8f | 1066 | EXPORT_SYMBOL_GPL(get_nfs_open_context); |
1da177e4 | 1067 | |
7fe5c398 | 1068 | static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync) |
1da177e4 | 1069 | { |
2b0143b5 | 1070 | struct inode *inode = d_inode(ctx->dentry); |
3d4ff43d | 1071 | struct super_block *sb = ctx->dentry->d_sb; |
3bec63db | 1072 | |
0de43976 TM |
1073 | if (!refcount_dec_and_test(&ctx->lock_context.count)) |
1074 | return; | |
5c78f58e | 1075 | if (!list_empty(&ctx->list)) { |
0de43976 TM |
1076 | spin_lock(&inode->i_lock); |
1077 | list_del_rcu(&ctx->list); | |
ef84303e | 1078 | spin_unlock(&inode->i_lock); |
0de43976 | 1079 | } |
5c78f58e TM |
1080 | if (inode != NULL) |
1081 | NFS_PROTO(inode)->close_context(ctx, is_sync); | |
a52458b4 | 1082 | put_cred(ctx->cred); |
3d4ff43d | 1083 | dput(ctx->dentry); |
322b2b90 | 1084 | nfs_sb_deactive(sb); |
ca05cbae | 1085 | put_rpccred(rcu_dereference_protected(ctx->ll_cred, 1)); |
82be417a | 1086 | kfree(ctx->mdsthreshold); |
0de43976 | 1087 | kfree_rcu(ctx, rcu_head); |
3bec63db TM |
1088 | } |
1089 | ||
a49c3c77 TM |
1090 | void put_nfs_open_context(struct nfs_open_context *ctx) |
1091 | { | |
1092 | __put_nfs_open_context(ctx, 0); | |
1093 | } | |
89d77c8f | 1094 | EXPORT_SYMBOL_GPL(put_nfs_open_context); |
a49c3c77 | 1095 | |
4eae5014 TM |
1096 | static void put_nfs_open_context_sync(struct nfs_open_context *ctx) |
1097 | { | |
1098 | __put_nfs_open_context(ctx, 1); | |
1099 | } | |
1100 | ||
1da177e4 LT |
1101 | /* |
1102 | * Ensure that mmap has a recent RPC credential for use when writing out | |
1103 | * shared pages | |
1104 | */ | |
c45ffdd2 | 1105 | void nfs_inode_attach_open_context(struct nfs_open_context *ctx) |
1da177e4 | 1106 | { |
2b0143b5 | 1107 | struct inode *inode = d_inode(ctx->dentry); |
1da177e4 LT |
1108 | struct nfs_inode *nfsi = NFS_I(inode); |
1109 | ||
1da177e4 | 1110 | spin_lock(&inode->i_lock); |
1c341b77 TM |
1111 | if (list_empty(&nfsi->open_files) && |
1112 | (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER)) | |
ac46b3d7 TM |
1113 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA | |
1114 | NFS_INO_REVAL_FORCED); | |
0de43976 | 1115 | list_add_tail_rcu(&ctx->list, &nfsi->open_files); |
1da177e4 LT |
1116 | spin_unlock(&inode->i_lock); |
1117 | } | |
c45ffdd2 TM |
1118 | EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context); |
1119 | ||
1120 | void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx) | |
1121 | { | |
1122 | filp->private_data = get_nfs_open_context(ctx); | |
e97bc663 | 1123 | set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags); |
c45ffdd2 TM |
1124 | if (list_empty(&ctx->list)) |
1125 | nfs_inode_attach_open_context(ctx); | |
1126 | } | |
89d77c8f | 1127 | EXPORT_SYMBOL_GPL(nfs_file_set_open_context); |
1da177e4 | 1128 | |
d530838b TM |
1129 | /* |
1130 | * Given an inode, search for an open context with the desired characteristics | |
1131 | */ | |
a52458b4 | 1132 | struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode) |
1da177e4 LT |
1133 | { |
1134 | struct nfs_inode *nfsi = NFS_I(inode); | |
1135 | struct nfs_open_context *pos, *ctx = NULL; | |
1136 | ||
0de43976 TM |
1137 | rcu_read_lock(); |
1138 | list_for_each_entry_rcu(pos, &nfsi->open_files, list) { | |
65f51603 | 1139 | if (cred != NULL && cred_fscmp(pos->cred, cred) != 0) |
d530838b | 1140 | continue; |
1544fa0f TM |
1141 | if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode) |
1142 | continue; | |
e97bc663 TM |
1143 | if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags)) |
1144 | continue; | |
1544fa0f | 1145 | ctx = get_nfs_open_context(pos); |
0de43976 TM |
1146 | if (ctx) |
1147 | break; | |
1da177e4 | 1148 | } |
0de43976 | 1149 | rcu_read_unlock(); |
1da177e4 LT |
1150 | return ctx; |
1151 | } | |
1152 | ||
aff8d8dc | 1153 | void nfs_file_clear_open_context(struct file *filp) |
1da177e4 | 1154 | { |
cd3758e3 | 1155 | struct nfs_open_context *ctx = nfs_file_open_context(filp); |
1da177e4 LT |
1156 | |
1157 | if (ctx) { | |
2b0143b5 | 1158 | struct inode *inode = d_inode(ctx->dentry); |
c45ffdd2 | 1159 | |
e97bc663 | 1160 | clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags); |
0bcbf039 PT |
1161 | /* |
1162 | * We fatal error on write before. Try to writeback | |
1163 | * every page again. | |
1164 | */ | |
1165 | if (ctx->error < 0) | |
1166 | invalidate_inode_pages2(inode->i_mapping); | |
1da177e4 | 1167 | filp->private_data = NULL; |
4eae5014 | 1168 | put_nfs_open_context_sync(ctx); |
1da177e4 LT |
1169 | } |
1170 | } | |
1171 | ||
1172 | /* | |
1173 | * These allocate and release file read/write context information. | |
1174 | */ | |
1175 | int nfs_open(struct inode *inode, struct file *filp) | |
1176 | { | |
1177 | struct nfs_open_context *ctx; | |
1da177e4 | 1178 | |
6f1c1d95 C |
1179 | ctx = alloc_nfs_open_context(file_dentry(filp), |
1180 | flags_to_mode(filp->f_flags), filp); | |
5ede7b1c AV |
1181 | if (IS_ERR(ctx)) |
1182 | return PTR_ERR(ctx); | |
1da177e4 LT |
1183 | nfs_file_set_open_context(filp, ctx); |
1184 | put_nfs_open_context(ctx); | |
f1fe29b4 | 1185 | nfs_fscache_open_file(inode, filp); |
1da177e4 LT |
1186 | return 0; |
1187 | } | |
1188 | ||
1da177e4 LT |
1189 | /* |
1190 | * This function is called whenever some part of NFS notices that | |
1191 | * the cached attributes have to be refreshed. | |
1192 | */ | |
1193 | int | |
1194 | __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) | |
1195 | { | |
1196 | int status = -ESTALE; | |
a3cba2aa | 1197 | struct nfs_fattr *fattr = NULL; |
1da177e4 | 1198 | struct nfs_inode *nfsi = NFS_I(inode); |
1da177e4 | 1199 | |
1e8968c5 NV |
1200 | dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n", |
1201 | inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode)); | |
1da177e4 | 1202 | |
f4ce1299 TM |
1203 | trace_nfs_revalidate_inode_enter(inode); |
1204 | ||
85233a7a | 1205 | if (is_bad_inode(inode)) |
691beb13 | 1206 | goto out; |
1da177e4 | 1207 | if (NFS_STALE(inode)) |
412d582e | 1208 | goto out; |
7fdc49c4 | 1209 | |
ac46bd37 TM |
1210 | /* pNFS: Attributes aren't updated until we layoutcommit */ |
1211 | if (S_ISREG(inode->i_mode)) { | |
1212 | status = pnfs_sync_inode(inode, false); | |
1213 | if (status) | |
1214 | goto out; | |
1215 | } | |
1216 | ||
a3cba2aa | 1217 | status = -ENOMEM; |
2ef61e0e | 1218 | fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode)); |
a3cba2aa TM |
1219 | if (fattr == NULL) |
1220 | goto out; | |
1221 | ||
691beb13 | 1222 | nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE); |
14c43f76 | 1223 | |
2ef61e0e | 1224 | status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, inode); |
1da177e4 | 1225 | if (status != 0) { |
1e8968c5 | 1226 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n", |
1da177e4 | 1227 | inode->i_sb->s_id, |
1e8968c5 | 1228 | (unsigned long long)NFS_FILEID(inode), status); |
c74dfe97 TM |
1229 | switch (status) { |
1230 | case -ETIMEDOUT: | |
1231 | /* A soft timeout occurred. Use cached information? */ | |
1232 | if (server->flags & NFS_MOUNT_SOFTREVAL) | |
1233 | status = 0; | |
1234 | break; | |
1235 | case -ESTALE: | |
1da177e4 | 1236 | if (!S_ISDIR(inode->i_mode)) |
93ce4af7 TM |
1237 | nfs_set_inode_stale(inode); |
1238 | else | |
1239 | nfs_zap_caches(inode); | |
1da177e4 | 1240 | } |
2ef61e0e | 1241 | goto out; |
1da177e4 LT |
1242 | } |
1243 | ||
a3cba2aa | 1244 | status = nfs_refresh_inode(inode, fattr); |
1da177e4 | 1245 | if (status) { |
1e8968c5 | 1246 | dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n", |
1da177e4 | 1247 | inode->i_sb->s_id, |
1e8968c5 | 1248 | (unsigned long long)NFS_FILEID(inode), status); |
2ef61e0e | 1249 | goto out; |
1da177e4 | 1250 | } |
55296809 | 1251 | |
24aa1fe6 | 1252 | if (nfsi->cache_validity & NFS_INO_INVALID_ACL) |
ada70d94 | 1253 | nfs_zap_acl_cache(inode); |
55296809 | 1254 | |
dd225cb3 | 1255 | nfs_setsecurity(inode, fattr); |
3da580aa | 1256 | |
1e8968c5 | 1257 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n", |
1da177e4 | 1258 | inode->i_sb->s_id, |
1e8968c5 | 1259 | (unsigned long long)NFS_FILEID(inode)); |
1da177e4 | 1260 | |
14c43f76 | 1261 | out: |
a3cba2aa | 1262 | nfs_free_fattr(fattr); |
f4ce1299 | 1263 | trace_nfs_revalidate_inode_exit(inode, status); |
1da177e4 LT |
1264 | return status; |
1265 | } | |
1266 | ||
43f291cd | 1267 | int nfs_attribute_cache_expired(struct inode *inode) |
d7cf8dd0 | 1268 | { |
b4d2314b | 1269 | if (nfs_have_delegated_attributes(inode)) |
1da177e4 | 1270 | return 0; |
d7cf8dd0 | 1271 | return nfs_attribute_timeout(inode); |
1da177e4 LT |
1272 | } |
1273 | ||
1274 | /** | |
1275 | * nfs_revalidate_inode - Revalidate the inode attributes | |
302fad7b | 1276 | * @inode: pointer to inode struct |
1f3208b2 | 1277 | * @flags: cache flags to check |
1da177e4 LT |
1278 | * |
1279 | * Updates inode attribute information by retrieving the data from the server. | |
1280 | */ | |
1f3208b2 | 1281 | int nfs_revalidate_inode(struct inode *inode, unsigned long flags) |
1da177e4 | 1282 | { |
1f3208b2 | 1283 | if (!nfs_check_cache_invalid(inode, flags)) |
1da177e4 | 1284 | return NFS_STALE(inode) ? -ESTALE : 0; |
1f3208b2 | 1285 | return __nfs_revalidate_inode(NFS_SERVER(inode), inode); |
1da177e4 | 1286 | } |
1c606fb7 | 1287 | EXPORT_SYMBOL_GPL(nfs_revalidate_inode); |
1da177e4 | 1288 | |
1cda707d | 1289 | static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping) |
717d44e8 | 1290 | { |
f8806c84 TM |
1291 | int ret; |
1292 | ||
a6b5a28e | 1293 | nfs_fscache_invalidate(inode, 0); |
717d44e8 | 1294 | if (mapping->nrpages != 0) { |
f8806c84 TM |
1295 | if (S_ISREG(inode->i_mode)) { |
1296 | ret = nfs_sync_mapping(mapping); | |
1297 | if (ret < 0) | |
1298 | return ret; | |
1299 | } | |
1300 | ret = invalidate_inode_pages2(mapping); | |
717d44e8 TM |
1301 | if (ret < 0) |
1302 | return ret; | |
1303 | } | |
717d44e8 | 1304 | nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE); |
f4ce1299 | 1305 | |
1e8968c5 NV |
1306 | dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n", |
1307 | inode->i_sb->s_id, | |
1308 | (unsigned long long)NFS_FILEID(inode)); | |
717d44e8 TM |
1309 | return 0; |
1310 | } | |
1311 | ||
717d44e8 | 1312 | /** |
28aa2f9e | 1313 | * nfs_clear_invalid_mapping - Conditionally clear a mapping |
302fad7b | 1314 | * @mapping: pointer to mapping |
28aa2f9e TM |
1315 | * |
1316 | * If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping. | |
717d44e8 | 1317 | */ |
28aa2f9e | 1318 | int nfs_clear_invalid_mapping(struct address_space *mapping) |
717d44e8 | 1319 | { |
28aa2f9e | 1320 | struct inode *inode = mapping->host; |
717d44e8 | 1321 | struct nfs_inode *nfsi = NFS_I(inode); |
d529ef83 | 1322 | unsigned long *bitlock = &nfsi->flags; |
717d44e8 | 1323 | int ret = 0; |
dc59250c | 1324 | |
d529ef83 JL |
1325 | /* |
1326 | * We must clear NFS_INO_INVALID_DATA first to ensure that | |
1327 | * invalidations that come in while we're shooting down the mappings | |
1328 | * are respected. But, that leaves a race window where one revalidator | |
1329 | * can clear the flag, and then another checks it before the mapping | |
1330 | * gets invalidated. Fix that by serializing access to this part of | |
1331 | * the function. | |
1332 | * | |
1333 | * At the same time, we need to allow other tasks to see whether we | |
1334 | * might be in the middle of invalidating the pages, so we only set | |
1335 | * the bit lock here if it looks like we're going to be doing that. | |
1336 | */ | |
1337 | for (;;) { | |
74316201 | 1338 | ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING, |
f5d39b02 PZ |
1339 | nfs_wait_bit_killable, |
1340 | TASK_KILLABLE|TASK_FREEZABLE_UNSAFE); | |
d529ef83 JL |
1341 | if (ret) |
1342 | goto out; | |
17dfeb91 TM |
1343 | spin_lock(&inode->i_lock); |
1344 | if (test_bit(NFS_INO_INVALIDATING, bitlock)) { | |
1345 | spin_unlock(&inode->i_lock); | |
1346 | continue; | |
1347 | } | |
1348 | if (nfsi->cache_validity & NFS_INO_INVALID_DATA) | |
d529ef83 | 1349 | break; |
d529ef83 | 1350 | spin_unlock(&inode->i_lock); |
17dfeb91 | 1351 | goto out; |
f4ce1299 TM |
1352 | } |
1353 | ||
17dfeb91 | 1354 | set_bit(NFS_INO_INVALIDATING, bitlock); |
4db72b40 | 1355 | smp_wmb(); |
28aa2f9e TM |
1356 | nfsi->cache_validity &= |
1357 | ~(NFS_INO_INVALID_DATA | NFS_INO_DATA_INVAL_DEFER); | |
17dfeb91 TM |
1358 | spin_unlock(&inode->i_lock); |
1359 | trace_nfs_invalidate_mapping_enter(inode); | |
be527494 | 1360 | ret = nfs_invalidate_mapping(inode, mapping); |
17dfeb91 TM |
1361 | trace_nfs_invalidate_mapping_exit(inode, ret); |
1362 | ||
d529ef83 | 1363 | clear_bit_unlock(NFS_INO_INVALIDATING, bitlock); |
4e857c58 | 1364 | smp_mb__after_atomic(); |
d529ef83 | 1365 | wake_up_bit(bitlock, NFS_INO_INVALIDATING); |
cd9ae2b6 | 1366 | out: |
44b11874 | 1367 | return ret; |
7d52e862 TM |
1368 | } |
1369 | ||
28aa2f9e TM |
1370 | bool nfs_mapping_need_revalidate_inode(struct inode *inode) |
1371 | { | |
13c0b082 | 1372 | return nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE) || |
28aa2f9e TM |
1373 | NFS_STALE(inode); |
1374 | } | |
1375 | ||
1376 | int nfs_revalidate_mapping_rcu(struct inode *inode) | |
1377 | { | |
1378 | struct nfs_inode *nfsi = NFS_I(inode); | |
1379 | unsigned long *bitlock = &nfsi->flags; | |
1380 | int ret = 0; | |
1381 | ||
1382 | if (IS_SWAPFILE(inode)) | |
1383 | goto out; | |
1384 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1385 | ret = -ECHILD; | |
1386 | goto out; | |
1387 | } | |
1388 | spin_lock(&inode->i_lock); | |
1389 | if (test_bit(NFS_INO_INVALIDATING, bitlock) || | |
1390 | (nfsi->cache_validity & NFS_INO_INVALID_DATA)) | |
1391 | ret = -ECHILD; | |
1392 | spin_unlock(&inode->i_lock); | |
1393 | out: | |
1394 | return ret; | |
1395 | } | |
1396 | ||
1397 | /** | |
1398 | * nfs_revalidate_mapping - Revalidate the pagecache | |
1399 | * @inode: pointer to host inode | |
1400 | * @mapping: pointer to mapping | |
1401 | */ | |
1402 | int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping) | |
1403 | { | |
1404 | /* swapfiles are not supposed to be shared. */ | |
1405 | if (IS_SWAPFILE(inode)) | |
1406 | return 0; | |
1407 | ||
1408 | if (nfs_mapping_need_revalidate_inode(inode)) { | |
1409 | int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode); | |
1410 | if (ret < 0) | |
1411 | return ret; | |
1412 | } | |
1413 | ||
1414 | return nfs_clear_invalid_mapping(mapping); | |
1415 | } | |
1416 | ||
ca0daa27 | 1417 | static bool nfs_file_has_writers(struct nfs_inode *nfsi) |
874f9463 | 1418 | { |
ca0daa27 TM |
1419 | struct inode *inode = &nfsi->vfs_inode; |
1420 | ||
ca0daa27 TM |
1421 | if (!S_ISREG(inode->i_mode)) |
1422 | return false; | |
1423 | if (list_empty(&nfsi->open_files)) | |
1424 | return false; | |
6ba0c4e5 | 1425 | return inode_is_open_for_write(inode); |
874f9463 TM |
1426 | } |
1427 | ||
651b0e70 | 1428 | static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi) |
874f9463 | 1429 | { |
651b0e70 | 1430 | return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi); |
874f9463 TM |
1431 | } |
1432 | ||
783b194c | 1433 | static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
a895b4a1 | 1434 | { |
e86d5a02 | 1435 | struct timespec64 ts; |
95582b00 | 1436 | |
9e6e70f8 TM |
1437 | if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE) |
1438 | && (fattr->valid & NFS_ATTR_FATTR_CHANGE) | |
c472c07b | 1439 | && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) { |
1eb5d98f | 1440 | inode_set_iversion_raw(inode, fattr->change_attr); |
70ca8852 | 1441 | if (S_ISDIR(inode->i_mode)) |
6edf9609 | 1442 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA); |
0f44da51 FL |
1443 | else if (nfs_server_capable(inode, NFS_CAP_XATTR)) |
1444 | nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR); | |
70ca8852 | 1445 | } |
a895b4a1 | 1446 | /* If we have atomic WCC data, we may update some attributes */ |
e86d5a02 | 1447 | ts = inode->i_ctime; |
9e6e70f8 TM |
1448 | if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME) |
1449 | && (fattr->valid & NFS_ATTR_FATTR_CTIME) | |
e86d5a02 TM |
1450 | && timespec64_equal(&ts, &fattr->pre_ctime)) { |
1451 | inode->i_ctime = fattr->ctime; | |
27dc1cd3 | 1452 | } |
9e6e70f8 | 1453 | |
e86d5a02 | 1454 | ts = inode->i_mtime; |
9e6e70f8 TM |
1455 | if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME) |
1456 | && (fattr->valid & NFS_ATTR_FATTR_MTIME) | |
e86d5a02 TM |
1457 | && timespec64_equal(&ts, &fattr->pre_mtime)) { |
1458 | inode->i_mtime = fattr->mtime; | |
a895b4a1 | 1459 | } |
9e6e70f8 TM |
1460 | if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE) |
1461 | && (fattr->valid & NFS_ATTR_FATTR_SIZE) | |
1462 | && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size) | |
a6b6d5b8 | 1463 | && !nfs_have_writebacks(inode)) { |
110cb2d2 | 1464 | trace_nfs_size_wcc(inode, fattr->size); |
27dc1cd3 | 1465 | i_size_write(inode, nfs_size_to_loff_t(fattr->size)); |
27dc1cd3 | 1466 | } |
a895b4a1 TM |
1467 | } |
1468 | ||
1da177e4 | 1469 | /** |
33801147 | 1470 | * nfs_check_inode_attributes - verify consistency of the inode attribute cache |
302fad7b TM |
1471 | * @inode: pointer to inode |
1472 | * @fattr: updated attributes | |
1da177e4 LT |
1473 | * |
1474 | * Verifies the attribute cache. If we have just changed the attributes, | |
1475 | * so that fattr carries weak cache consistency data, then it may | |
1476 | * also update the ctime/mtime/change_attribute. | |
1477 | */ | |
33801147 | 1478 | static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 LT |
1479 | { |
1480 | struct nfs_inode *nfsi = NFS_I(inode); | |
1481 | loff_t cur_size, new_isize; | |
2a3f5fd4 | 1482 | unsigned long invalid = 0; |
e86d5a02 | 1483 | struct timespec64 ts; |
dc59250c | 1484 | |
4ebe83af | 1485 | if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ)) |
01da47bd | 1486 | return 0; |
4ebe83af | 1487 | |
eb3d8f42 TM |
1488 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) { |
1489 | /* Only a mounted-on-fileid? Just exit */ | |
1490 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
1491 | return 0; | |
ca62b9c3 | 1492 | /* Has the inode gone and changed behind our back? */ |
eb3d8f42 | 1493 | } else if (nfsi->fileid != fattr->fileid) { |
7e10cc25 TM |
1494 | /* Is this perhaps the mounted-on fileid? */ |
1495 | if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) && | |
1496 | nfsi->fileid == fattr->mounted_on_fileid) | |
1497 | return 0; | |
cc89684c | 1498 | return -ESTALE; |
7e10cc25 | 1499 | } |
6e3e2c43 | 1500 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) |
cc89684c | 1501 | return -ESTALE; |
ca62b9c3 | 1502 | |
7e10cc25 | 1503 | |
651b0e70 | 1504 | if (!nfs_file_has_buffered_writers(nfsi)) { |
ca0daa27 | 1505 | /* Verify a few of the more important attributes */ |
c472c07b | 1506 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr)) |
04c63498 | 1507 | invalid |= NFS_INO_INVALID_CHANGE; |
1da177e4 | 1508 | |
e86d5a02 TM |
1509 | ts = inode->i_mtime; |
1510 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime)) | |
16e14375 | 1511 | invalid |= NFS_INO_INVALID_MTIME; |
ca62b9c3 | 1512 | |
e86d5a02 TM |
1513 | ts = inode->i_ctime; |
1514 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime)) | |
16e14375 | 1515 | invalid |= NFS_INO_INVALID_CTIME; |
ca0daa27 TM |
1516 | |
1517 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { | |
1518 | cur_size = i_size_read(inode); | |
1519 | new_isize = nfs_size_to_loff_t(fattr->size); | |
1520 | if (cur_size != new_isize) | |
04c63498 | 1521 | invalid |= NFS_INO_INVALID_SIZE; |
ca0daa27 | 1522 | } |
9e6e70f8 | 1523 | } |
1da177e4 LT |
1524 | |
1525 | /* Have any file permissions changed? */ | |
9e6e70f8 | 1526 | if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) |
04c63498 | 1527 | invalid |= NFS_INO_INVALID_MODE; |
9ff593c4 | 1528 | if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid)) |
04c63498 | 1529 | invalid |= NFS_INO_INVALID_OTHER; |
9ff593c4 | 1530 | if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid)) |
04c63498 | 1531 | invalid |= NFS_INO_INVALID_OTHER; |
1da177e4 LT |
1532 | |
1533 | /* Has the link count changed? */ | |
9e6e70f8 | 1534 | if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink) |
fabf2b34 | 1535 | invalid |= NFS_INO_INVALID_NLINK; |
1da177e4 | 1536 | |
e86d5a02 TM |
1537 | ts = inode->i_atime; |
1538 | if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime)) | |
2a3f5fd4 TM |
1539 | invalid |= NFS_INO_INVALID_ATIME; |
1540 | ||
1541 | if (invalid != 0) | |
4ebe83af | 1542 | nfs_set_cache_invalid(inode, invalid); |
1da177e4 | 1543 | |
33801147 | 1544 | nfsi->read_cache_jiffies = fattr->time_start; |
1da177e4 LT |
1545 | return 0; |
1546 | } | |
1547 | ||
ae05f269 | 1548 | static atomic_long_t nfs_attr_generation_counter; |
4704f0e2 TM |
1549 | |
1550 | static unsigned long nfs_read_attr_generation_counter(void) | |
1551 | { | |
ae05f269 | 1552 | return atomic_long_read(&nfs_attr_generation_counter); |
4704f0e2 TM |
1553 | } |
1554 | ||
1555 | unsigned long nfs_inc_attr_generation_counter(void) | |
1556 | { | |
ae05f269 | 1557 | return atomic_long_inc_return(&nfs_attr_generation_counter); |
4704f0e2 | 1558 | } |
3235b403 | 1559 | EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter); |
4704f0e2 TM |
1560 | |
1561 | void nfs_fattr_init(struct nfs_fattr *fattr) | |
1562 | { | |
1563 | fattr->valid = 0; | |
1564 | fattr->time_start = jiffies; | |
1565 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
6926afd1 TM |
1566 | fattr->owner_name = NULL; |
1567 | fattr->group_name = NULL; | |
4704f0e2 | 1568 | } |
ddda8e0a | 1569 | EXPORT_SYMBOL_GPL(nfs_fattr_init); |
4704f0e2 | 1570 | |
140e049c TM |
1571 | /** |
1572 | * nfs_fattr_set_barrier | |
1573 | * @fattr: attributes | |
1574 | * | |
1575 | * Used to set a barrier after an attribute was updated. This | |
1576 | * barrier ensures that older attributes from RPC calls that may | |
1577 | * have raced with our update cannot clobber these new values. | |
1578 | * Note that you are still responsible for ensuring that other | |
1579 | * operations which change the attribute on the server do not | |
1580 | * collide. | |
1581 | */ | |
1582 | void nfs_fattr_set_barrier(struct nfs_fattr *fattr) | |
1583 | { | |
1584 | fattr->gencount = nfs_inc_attr_generation_counter(); | |
1585 | } | |
1586 | ||
2d36bfde TM |
1587 | struct nfs_fattr *nfs_alloc_fattr(void) |
1588 | { | |
1589 | struct nfs_fattr *fattr; | |
1590 | ||
da48f267 | 1591 | fattr = kmalloc(sizeof(*fattr), GFP_KERNEL); |
d4a95a7e | 1592 | if (fattr != NULL) { |
2d36bfde | 1593 | nfs_fattr_init(fattr); |
d4a95a7e TM |
1594 | fattr->label = NULL; |
1595 | } | |
2d36bfde TM |
1596 | return fattr; |
1597 | } | |
ddda8e0a | 1598 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr); |
2d36bfde | 1599 | |
d755ad8d AS |
1600 | struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server) |
1601 | { | |
1602 | struct nfs_fattr *fattr = nfs_alloc_fattr(); | |
1603 | ||
1604 | if (!fattr) | |
1605 | return NULL; | |
1606 | ||
da48f267 | 1607 | fattr->label = nfs4_label_alloc(server, GFP_KERNEL); |
d755ad8d AS |
1608 | if (IS_ERR(fattr->label)) { |
1609 | kfree(fattr); | |
1610 | return NULL; | |
1611 | } | |
1612 | ||
1613 | return fattr; | |
1614 | } | |
1615 | EXPORT_SYMBOL_GPL(nfs_alloc_fattr_with_label); | |
1616 | ||
2d36bfde TM |
1617 | struct nfs_fh *nfs_alloc_fhandle(void) |
1618 | { | |
1619 | struct nfs_fh *fh; | |
1620 | ||
da48f267 | 1621 | fh = kmalloc(sizeof(struct nfs_fh), GFP_KERNEL); |
2d36bfde TM |
1622 | if (fh != NULL) |
1623 | fh->size = 0; | |
1624 | return fh; | |
1625 | } | |
ddda8e0a | 1626 | EXPORT_SYMBOL_GPL(nfs_alloc_fhandle); |
2d36bfde | 1627 | |
e27d359e | 1628 | #ifdef NFS_DEBUG |
d8e0539e WAA |
1629 | /* |
1630 | * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle | |
1631 | * in the same way that wireshark does | |
1632 | * | |
1633 | * @fh: file handle | |
1634 | * | |
1635 | * For debugging only. | |
1636 | */ | |
1637 | u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh) | |
1638 | { | |
1639 | /* wireshark uses 32-bit AUTODIN crc and does a bitwise | |
1640 | * not on the result */ | |
1264a2f0 | 1641 | return nfs_fhandle_hash(fh); |
d8e0539e | 1642 | } |
9e6ee76d | 1643 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash); |
d8e0539e WAA |
1644 | |
1645 | /* | |
20d27e92 CL |
1646 | * _nfs_display_fhandle - display an NFS file handle on the console |
1647 | * | |
1648 | * @fh: file handle to display | |
1649 | * @caption: display caption | |
1650 | * | |
1651 | * For debugging only. | |
1652 | */ | |
20d27e92 CL |
1653 | void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption) |
1654 | { | |
1655 | unsigned short i; | |
1656 | ||
fa68a1ba | 1657 | if (fh == NULL || fh->size == 0) { |
20d27e92 CL |
1658 | printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh); |
1659 | return; | |
1660 | } | |
1661 | ||
d8e0539e WAA |
1662 | printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n", |
1663 | caption, fh, fh->size, _nfs_display_fhandle_hash(fh)); | |
20d27e92 CL |
1664 | for (i = 0; i < fh->size; i += 16) { |
1665 | __be32 *pos = (__be32 *)&fh->data[i]; | |
1666 | ||
1667 | switch ((fh->size - i - 1) >> 2) { | |
1668 | case 0: | |
1669 | printk(KERN_DEFAULT " %08x\n", | |
1670 | be32_to_cpup(pos)); | |
1671 | break; | |
1672 | case 1: | |
1673 | printk(KERN_DEFAULT " %08x %08x\n", | |
1674 | be32_to_cpup(pos), be32_to_cpup(pos + 1)); | |
1675 | break; | |
1676 | case 2: | |
1677 | printk(KERN_DEFAULT " %08x %08x %08x\n", | |
1678 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1679 | be32_to_cpup(pos + 2)); | |
1680 | break; | |
1681 | default: | |
1682 | printk(KERN_DEFAULT " %08x %08x %08x %08x\n", | |
1683 | be32_to_cpup(pos), be32_to_cpup(pos + 1), | |
1684 | be32_to_cpup(pos + 2), be32_to_cpup(pos + 3)); | |
1685 | } | |
1686 | } | |
1687 | } | |
9e6ee76d | 1688 | EXPORT_SYMBOL_GPL(_nfs_display_fhandle); |
20d27e92 CL |
1689 | #endif |
1690 | ||
a10ad176 | 1691 | /** |
6f9be83d | 1692 | * nfs_inode_attrs_cmp_generic - compare attributes |
302fad7b | 1693 | * @fattr: attributes |
302fad7b | 1694 | * @inode: pointer to inode |
a10ad176 TM |
1695 | * |
1696 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1697 | * attributes got scheduled after another call carrying updated ones. | |
4704f0e2 | 1698 | * Note also the check for wraparound of 'attr_gencount' |
a10ad176 | 1699 | * |
6f9be83d TM |
1700 | * The function returns '1' if it thinks the attributes in @fattr are |
1701 | * more recent than the ones cached in @inode. Otherwise it returns | |
1702 | * the value '0'. | |
a10ad176 | 1703 | */ |
6f9be83d TM |
1704 | static int nfs_inode_attrs_cmp_generic(const struct nfs_fattr *fattr, |
1705 | const struct inode *inode) | |
a10ad176 | 1706 | { |
9fdbfad1 | 1707 | unsigned long attr_gencount = NFS_I(inode)->attr_gencount; |
a10ad176 | 1708 | |
9fdbfad1 TM |
1709 | return (long)(fattr->gencount - attr_gencount) > 0 || |
1710 | (long)(attr_gencount - nfs_read_attr_generation_counter()) > 0; | |
a10ad176 TM |
1711 | } |
1712 | ||
6f9be83d TM |
1713 | /** |
1714 | * nfs_inode_attrs_cmp_monotonic - compare attributes | |
302fad7b | 1715 | * @fattr: attributes |
6f9be83d | 1716 | * @inode: pointer to inode |
a10ad176 TM |
1717 | * |
1718 | * Attempt to divine whether or not an RPC call reply carrying stale | |
1719 | * attributes got scheduled after another call carrying updated ones. | |
1720 | * | |
6f9be83d TM |
1721 | * We assume that the server observes monotonic semantics for |
1722 | * the change attribute, so a larger value means that the attributes in | |
1723 | * @fattr are more recent, in which case the function returns the | |
1724 | * value '1'. | |
1725 | * A return value of '0' indicates no measurable change | |
1726 | * A return value of '-1' means that the attributes in @inode are | |
1727 | * more recent. | |
1728 | */ | |
1729 | static int nfs_inode_attrs_cmp_monotonic(const struct nfs_fattr *fattr, | |
1730 | const struct inode *inode) | |
a10ad176 | 1731 | { |
6f9be83d TM |
1732 | s64 diff = fattr->change_attr - inode_peek_iversion_raw(inode); |
1733 | if (diff > 0) | |
1734 | return 1; | |
1735 | return diff == 0 ? 0 : -1; | |
1736 | } | |
1737 | ||
1738 | /** | |
1739 | * nfs_inode_attrs_cmp_strict_monotonic - compare attributes | |
1740 | * @fattr: attributes | |
1741 | * @inode: pointer to inode | |
a10ad176 | 1742 | * |
6f9be83d TM |
1743 | * Attempt to divine whether or not an RPC call reply carrying stale |
1744 | * attributes got scheduled after another call carrying updated ones. | |
a10ad176 | 1745 | * |
6f9be83d TM |
1746 | * We assume that the server observes strictly monotonic semantics for |
1747 | * the change attribute, so a larger value means that the attributes in | |
1748 | * @fattr are more recent, in which case the function returns the | |
1749 | * value '1'. | |
1750 | * A return value of '-1' means that the attributes in @inode are | |
1751 | * more recent or unchanged. | |
a10ad176 | 1752 | */ |
6f9be83d TM |
1753 | static int nfs_inode_attrs_cmp_strict_monotonic(const struct nfs_fattr *fattr, |
1754 | const struct inode *inode) | |
a10ad176 | 1755 | { |
6f9be83d TM |
1756 | return nfs_inode_attrs_cmp_monotonic(fattr, inode) > 0 ? 1 : -1; |
1757 | } | |
a10ad176 | 1758 | |
6f9be83d TM |
1759 | /** |
1760 | * nfs_inode_attrs_cmp - compare attributes | |
1761 | * @fattr: attributes | |
1762 | * @inode: pointer to inode | |
1763 | * | |
1764 | * This function returns '1' if it thinks the attributes in @fattr are | |
1765 | * more recent than the ones cached in @inode. It returns '-1' if | |
1766 | * the attributes in @inode are more recent than the ones in @fattr, | |
1767 | * and it returns 0 if not sure. | |
1768 | */ | |
1769 | static int nfs_inode_attrs_cmp(const struct nfs_fattr *fattr, | |
1770 | const struct inode *inode) | |
1771 | { | |
1772 | if (nfs_inode_attrs_cmp_generic(fattr, inode) > 0) | |
1773 | return 1; | |
1774 | switch (NFS_SERVER(inode)->change_attr_type) { | |
1775 | case NFS4_CHANGE_TYPE_IS_UNDEFINED: | |
1776 | break; | |
1777 | case NFS4_CHANGE_TYPE_IS_TIME_METADATA: | |
1778 | if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE)) | |
1779 | break; | |
1780 | return nfs_inode_attrs_cmp_monotonic(fattr, inode); | |
1781 | default: | |
1782 | if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE)) | |
1783 | break; | |
1784 | return nfs_inode_attrs_cmp_strict_monotonic(fattr, inode); | |
1785 | } | |
1786 | return 0; | |
1787 | } | |
1788 | ||
7b24dacf TM |
1789 | /** |
1790 | * nfs_inode_finish_partial_attr_update - complete a previous inode update | |
1791 | * @fattr: attributes | |
1792 | * @inode: pointer to inode | |
1793 | * | |
1794 | * Returns '1' if the last attribute update left the inode cached | |
1795 | * attributes in a partially unrevalidated state, and @fattr | |
1796 | * matches the change attribute of that partial update. | |
1797 | * Otherwise returns '0'. | |
1798 | */ | |
1799 | static int nfs_inode_finish_partial_attr_update(const struct nfs_fattr *fattr, | |
1800 | const struct inode *inode) | |
1801 | { | |
1802 | const unsigned long check_valid = | |
1803 | NFS_INO_INVALID_ATIME | NFS_INO_INVALID_CTIME | | |
1804 | NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE | | |
1805 | NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_OTHER | | |
1806 | NFS_INO_INVALID_NLINK; | |
1807 | unsigned long cache_validity = NFS_I(inode)->cache_validity; | |
eea41330 | 1808 | enum nfs4_change_attr_type ctype = NFS_SERVER(inode)->change_attr_type; |
7b24dacf | 1809 | |
eea41330 TM |
1810 | if (ctype != NFS4_CHANGE_TYPE_IS_UNDEFINED && |
1811 | !(cache_validity & NFS_INO_INVALID_CHANGE) && | |
7b24dacf TM |
1812 | (cache_validity & check_valid) != 0 && |
1813 | (fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && | |
1814 | nfs_inode_attrs_cmp_monotonic(fattr, inode) == 0) | |
1815 | return 1; | |
1816 | return 0; | |
a10ad176 TM |
1817 | } |
1818 | ||
6f9be83d TM |
1819 | static int nfs_refresh_inode_locked(struct inode *inode, |
1820 | struct nfs_fattr *fattr) | |
a10ad176 | 1821 | { |
6f9be83d TM |
1822 | int attr_cmp = nfs_inode_attrs_cmp(fattr, inode); |
1823 | int ret = 0; | |
f4ce1299 TM |
1824 | |
1825 | trace_nfs_refresh_inode_enter(inode); | |
1826 | ||
7b24dacf | 1827 | if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode)) |
f4ce1299 | 1828 | ret = nfs_update_inode(inode, fattr); |
6f9be83d | 1829 | else if (attr_cmp == 0) |
f4ce1299 TM |
1830 | ret = nfs_check_inode_attributes(inode, fattr); |
1831 | ||
1832 | trace_nfs_refresh_inode_exit(inode, ret); | |
1833 | return ret; | |
870a5be8 TM |
1834 | } |
1835 | ||
33801147 TM |
1836 | /** |
1837 | * nfs_refresh_inode - try to update the inode attribute cache | |
302fad7b TM |
1838 | * @inode: pointer to inode |
1839 | * @fattr: updated attributes | |
33801147 TM |
1840 | * |
1841 | * Check that an RPC call that returned attributes has not overlapped with | |
1842 | * other recent updates of the inode metadata, then decide whether it is | |
1843 | * safe to do a full update of the inode attributes, or whether just to | |
1844 | * call nfs_check_inode_attributes. | |
1845 | */ | |
1846 | int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1847 | { | |
33801147 TM |
1848 | int status; |
1849 | ||
1850 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) | |
1851 | return 0; | |
1852 | spin_lock(&inode->i_lock); | |
870a5be8 | 1853 | status = nfs_refresh_inode_locked(inode, fattr); |
33801147 | 1854 | spin_unlock(&inode->i_lock); |
ef79c097 | 1855 | |
33801147 TM |
1856 | return status; |
1857 | } | |
ddda8e0a | 1858 | EXPORT_SYMBOL_GPL(nfs_refresh_inode); |
33801147 | 1859 | |
16e14375 TM |
1860 | static int nfs_post_op_update_inode_locked(struct inode *inode, |
1861 | struct nfs_fattr *fattr, unsigned int invalid) | |
d65f557f | 1862 | { |
6edf9609 TM |
1863 | if (S_ISDIR(inode->i_mode)) |
1864 | invalid |= NFS_INO_INVALID_DATA; | |
1865 | nfs_set_cache_invalid(inode, invalid); | |
d65f557f TM |
1866 | if ((fattr->valid & NFS_ATTR_FATTR) == 0) |
1867 | return 0; | |
1868 | return nfs_refresh_inode_locked(inode, fattr); | |
1869 | } | |
1870 | ||
decf491f TM |
1871 | /** |
1872 | * nfs_post_op_update_inode - try to update the inode attribute cache | |
302fad7b TM |
1873 | * @inode: pointer to inode |
1874 | * @fattr: updated attributes | |
decf491f TM |
1875 | * |
1876 | * After an operation that has changed the inode metadata, mark the | |
1877 | * attribute cache as being invalid, then try to update it. | |
f551e44f CL |
1878 | * |
1879 | * NB: if the server didn't return any post op attributes, this | |
1880 | * function will force the retrieval of attributes before the next | |
1881 | * NFS request. Thus it should be used only for operations that | |
1882 | * are expected to change one or more attributes, to avoid | |
1883 | * unnecessary NFS requests and trips through nfs_update_inode(). | |
decf491f TM |
1884 | */ |
1885 | int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) | |
1886 | { | |
d65f557f | 1887 | int status; |
decf491f | 1888 | |
7668fdbe | 1889 | spin_lock(&inode->i_lock); |
92d64e47 | 1890 | nfs_fattr_set_barrier(fattr); |
16e14375 TM |
1891 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1892 | NFS_INO_INVALID_CHANGE | |
d554168f TM |
1893 | | NFS_INO_INVALID_CTIME |
1894 | | NFS_INO_REVAL_FORCED); | |
7668fdbe | 1895 | spin_unlock(&inode->i_lock); |
aa9c2669 | 1896 | |
870a5be8 | 1897 | return status; |
decf491f | 1898 | } |
1c606fb7 | 1899 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); |
decf491f | 1900 | |
70ca8852 | 1901 | /** |
a08a8cd3 | 1902 | * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache |
302fad7b TM |
1903 | * @inode: pointer to inode |
1904 | * @fattr: updated attributes | |
70ca8852 TM |
1905 | * |
1906 | * After an operation that has changed the inode metadata, mark the | |
1907 | * attribute cache as being invalid, then try to update it. Fake up | |
1908 | * weak cache consistency data, if none exist. | |
1909 | * | |
1910 | * This function is mainly designed to be used by the ->write_done() functions. | |
1911 | */ | |
a08a8cd3 | 1912 | int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr) |
70ca8852 | 1913 | { |
6f9be83d | 1914 | int attr_cmp = nfs_inode_attrs_cmp(fattr, inode); |
d65f557f TM |
1915 | int status; |
1916 | ||
d65f557f | 1917 | /* Don't do a WCC update if these attributes are already stale */ |
6f9be83d TM |
1918 | if (attr_cmp < 0) |
1919 | return 0; | |
1920 | if ((fattr->valid & NFS_ATTR_FATTR) == 0 || !attr_cmp) { | |
9e6e70f8 TM |
1921 | fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE |
1922 | | NFS_ATTR_FATTR_PRESIZE | |
1923 | | NFS_ATTR_FATTR_PREMTIME | |
1924 | | NFS_ATTR_FATTR_PRECTIME); | |
d65f557f TM |
1925 | goto out_noforce; |
1926 | } | |
9e6e70f8 TM |
1927 | if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && |
1928 | (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) { | |
1eb5d98f | 1929 | fattr->pre_change_attr = inode_peek_iversion_raw(inode); |
9e6e70f8 | 1930 | fattr->valid |= NFS_ATTR_FATTR_PRECHANGE; |
70ca8852 | 1931 | } |
9e6e70f8 TM |
1932 | if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 && |
1933 | (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) { | |
e86d5a02 | 1934 | fattr->pre_ctime = inode->i_ctime; |
9e6e70f8 TM |
1935 | fattr->valid |= NFS_ATTR_FATTR_PRECTIME; |
1936 | } | |
1937 | if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 && | |
1938 | (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) { | |
e86d5a02 | 1939 | fattr->pre_mtime = inode->i_mtime; |
9e6e70f8 TM |
1940 | fattr->valid |= NFS_ATTR_FATTR_PREMTIME; |
1941 | } | |
1942 | if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 && | |
1943 | (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) { | |
a3d01454 | 1944 | fattr->pre_size = i_size_read(inode); |
9e6e70f8 | 1945 | fattr->valid |= NFS_ATTR_FATTR_PRESIZE; |
70ca8852 | 1946 | } |
d65f557f | 1947 | out_noforce: |
16e14375 TM |
1948 | status = nfs_post_op_update_inode_locked(inode, fattr, |
1949 | NFS_INO_INVALID_CHANGE | |
1950 | | NFS_INO_INVALID_CTIME | |
3a39e778 ZB |
1951 | | NFS_INO_INVALID_MTIME |
1952 | | NFS_INO_INVALID_BLOCKS); | |
a08a8cd3 TM |
1953 | return status; |
1954 | } | |
1955 | ||
1956 | /** | |
1957 | * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache | |
302fad7b TM |
1958 | * @inode: pointer to inode |
1959 | * @fattr: updated attributes | |
a08a8cd3 TM |
1960 | * |
1961 | * After an operation that has changed the inode metadata, mark the | |
1962 | * attribute cache as being invalid, then try to update it. Fake up | |
1963 | * weak cache consistency data, if none exist. | |
1964 | * | |
1965 | * This function is mainly designed to be used by the ->write_done() functions. | |
1966 | */ | |
1967 | int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr) | |
1968 | { | |
1969 | int status; | |
1970 | ||
1971 | spin_lock(&inode->i_lock); | |
8f8ba1d7 | 1972 | nfs_fattr_set_barrier(fattr); |
a08a8cd3 | 1973 | status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr); |
d65f557f TM |
1974 | spin_unlock(&inode->i_lock); |
1975 | return status; | |
70ca8852 | 1976 | } |
ddda8e0a | 1977 | EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc); |
70ca8852 | 1978 | |
ea96d1ec | 1979 | |
1da177e4 LT |
1980 | /* |
1981 | * Many nfs protocol calls return the new file attributes after | |
1982 | * an operation. Here we update the inode to reflect the state | |
1983 | * of the server's inode. | |
1984 | * | |
1985 | * This is a bit tricky because we have to make sure all dirty pages | |
1986 | * have been sent off to the server before calling invalidate_inode_pages. | |
1987 | * To make sure no other process adds more write requests while we try | |
1988 | * our best to flush them, we make them sleep during the attribute refresh. | |
1989 | * | |
1990 | * A very similar scenario holds for the dir cache. | |
1991 | */ | |
24aa1fe6 | 1992 | static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) |
1da177e4 | 1993 | { |
ce62b114 | 1994 | struct nfs_server *server = NFS_SERVER(inode); |
1da177e4 | 1995 | struct nfs_inode *nfsi = NFS_I(inode); |
951a143b | 1996 | loff_t cur_isize, new_isize; |
ce62b114 | 1997 | u64 fattr_supported = server->fattr_valid; |
2a3f5fd4 | 1998 | unsigned long invalid = 0; |
3e7d950a | 1999 | unsigned long now = jiffies; |
62ab460c | 2000 | unsigned long save_cache_validity; |
651b0e70 | 2001 | bool have_writers = nfs_file_has_buffered_writers(nfsi); |
944171cb | 2002 | bool cache_revalidated = true; |
0b467264 | 2003 | bool attr_changed = false; |
c80d17c5 | 2004 | bool have_delegation; |
1da177e4 | 2005 | |
1e8968c5 | 2006 | dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n", |
3110ff80 | 2007 | __func__, inode->i_sb->s_id, inode->i_ino, |
4f1abd22 | 2008 | nfs_display_fhandle_hash(NFS_FH(inode)), |
1da177e4 LT |
2009 | atomic_read(&inode->i_count), fattr->valid); |
2010 | ||
eb3d8f42 TM |
2011 | if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) { |
2012 | /* Only a mounted-on-fileid? Just exit */ | |
2013 | if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) | |
2014 | return 0; | |
7e10cc25 | 2015 | /* Has the inode gone and changed behind our back? */ |
eb3d8f42 | 2016 | } else if (nfsi->fileid != fattr->fileid) { |
7e10cc25 TM |
2017 | /* Is this perhaps the mounted-on fileid? */ |
2018 | if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) && | |
2019 | nfsi->fileid == fattr->mounted_on_fileid) | |
2020 | return 0; | |
e73e6c9e MT |
2021 | printk(KERN_ERR "NFS: server %s error: fileid changed\n" |
2022 | "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n", | |
2023 | NFS_SERVER(inode)->nfs_client->cl_hostname, | |
2024 | inode->i_sb->s_id, (long long)nfsi->fileid, | |
2025 | (long long)fattr->fileid); | |
2026 | goto out_err; | |
2027 | } | |
1da177e4 LT |
2028 | |
2029 | /* | |
2030 | * Make sure the inode's type hasn't changed. | |
2031 | */ | |
6e3e2c43 | 2032 | if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) { |
e73e6c9e MT |
2033 | /* |
2034 | * Big trouble! The inode has become a different object. | |
2035 | */ | |
1e8968c5 | 2036 | printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n", |
e73e6c9e MT |
2037 | __func__, inode->i_ino, inode->i_mode, fattr->mode); |
2038 | goto out_err; | |
2039 | } | |
1da177e4 | 2040 | |
a0356862 | 2041 | /* Update the fsid? */ |
9e6e70f8 | 2042 | if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) && |
c37dcd33 | 2043 | !nfs_fsid_equal(&server->fsid, &fattr->fsid) && |
36d43a43 | 2044 | !IS_AUTOMOUNT(inode)) |
8b4bdcf8 TM |
2045 | server->fsid = fattr->fsid; |
2046 | ||
c80d17c5 TM |
2047 | /* Save the delegation state before clearing cache_validity */ |
2048 | have_delegation = nfs_have_delegated_attributes(inode); | |
2049 | ||
1da177e4 LT |
2050 | /* |
2051 | * Update the read time so we don't revalidate too often. | |
2052 | */ | |
33801147 | 2053 | nfsi->read_cache_jiffies = fattr->time_start; |
3e7d950a | 2054 | |
62ab460c TM |
2055 | save_cache_validity = nfsi->cache_validity; |
2056 | nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR | |
2057 | | NFS_INO_INVALID_ATIME | |
2058 | | NFS_INO_REVAL_FORCED | |
3a39e778 | 2059 | | NFS_INO_INVALID_BLOCKS); |
1da177e4 | 2060 | |
a895b4a1 | 2061 | /* Do atomic weak cache consistency updates */ |
783b194c | 2062 | nfs_wcc_update_inode(inode, fattr); |
a895b4a1 | 2063 | |
944171cb | 2064 | if (pnfs_layoutcommit_outstanding(inode)) { |
709fa576 TM |
2065 | nfsi->cache_validity |= |
2066 | save_cache_validity & | |
2067 | (NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME | | |
2068 | NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE | | |
cc7f2dae | 2069 | NFS_INO_INVALID_BLOCKS); |
944171cb BC |
2070 | cache_revalidated = false; |
2071 | } | |
10b7e9ad | 2072 | |
47aabaa7 | 2073 | /* More cache consistency checks */ |
9e6e70f8 | 2074 | if (fattr->valid & NFS_ATTR_FATTR_CHANGE) { |
c472c07b | 2075 | if (!inode_eq_iversion_raw(inode, fattr->change_attr)) { |
38512aa9 | 2076 | /* Could it be a race with writeback? */ |
c80d17c5 | 2077 | if (!(have_writers || have_delegation)) { |
0b467264 | 2078 | invalid |= NFS_INO_INVALID_DATA |
38512aa9 | 2079 | | NFS_INO_INVALID_ACCESS |
95ad37f9 FL |
2080 | | NFS_INO_INVALID_ACL |
2081 | | NFS_INO_INVALID_XATTR; | |
cac88f94 | 2082 | /* Force revalidate of all attributes */ |
16e14375 TM |
2083 | save_cache_validity |= NFS_INO_INVALID_CTIME |
2084 | | NFS_INO_INVALID_MTIME | |
2085 | | NFS_INO_INVALID_SIZE | |
4cdfeb64 | 2086 | | NFS_INO_INVALID_BLOCKS |
fabf2b34 | 2087 | | NFS_INO_INVALID_NLINK |
720869eb | 2088 | | NFS_INO_INVALID_MODE |
16e14375 | 2089 | | NFS_INO_INVALID_OTHER; |
38512aa9 TM |
2090 | if (S_ISDIR(inode->i_mode)) |
2091 | nfs_force_lookup_revalidate(inode); | |
a9601ac5 | 2092 | attr_changed = true; |
c80d17c5 TM |
2093 | dprintk("NFS: change_attr change on server for file %s/%ld\n", |
2094 | inode->i_sb->s_id, | |
2095 | inode->i_ino); | |
1c341b77 TM |
2096 | } else if (!have_delegation) |
2097 | nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER; | |
1eb5d98f | 2098 | inode_set_iversion_raw(inode, fattr->change_attr); |
9e6e70f8 | 2099 | } |
ade14a7d | 2100 | } else { |
cc7f2dae TM |
2101 | nfsi->cache_validity |= |
2102 | save_cache_validity & NFS_INO_INVALID_CHANGE; | |
213bb584 TM |
2103 | if (!have_delegation || |
2104 | (nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0) | |
2105 | cache_revalidated = false; | |
ade14a7d | 2106 | } |
9e6e70f8 | 2107 | |
213bb584 | 2108 | if (fattr->valid & NFS_ATTR_FATTR_MTIME) |
e86d5a02 | 2109 | inode->i_mtime = fattr->mtime; |
213bb584 | 2110 | else if (fattr_supported & NFS_ATTR_FATTR_MTIME) |
cc7f2dae TM |
2111 | nfsi->cache_validity |= |
2112 | save_cache_validity & NFS_INO_INVALID_MTIME; | |
62ab460c | 2113 | |
213bb584 | 2114 | if (fattr->valid & NFS_ATTR_FATTR_CTIME) |
e86d5a02 | 2115 | inode->i_ctime = fattr->ctime; |
213bb584 | 2116 | else if (fattr_supported & NFS_ATTR_FATTR_CTIME) |
cc7f2dae TM |
2117 | nfsi->cache_validity |= |
2118 | save_cache_validity & NFS_INO_INVALID_CTIME; | |
47aabaa7 | 2119 | |
951a143b | 2120 | /* Check if our cached file size is stale */ |
9e6e70f8 TM |
2121 | if (fattr->valid & NFS_ATTR_FATTR_SIZE) { |
2122 | new_isize = nfs_size_to_loff_t(fattr->size); | |
2123 | cur_isize = i_size_read(inode); | |
c80d17c5 | 2124 | if (new_isize != cur_isize && !have_delegation) { |
9e6e70f8 TM |
2125 | /* Do we perhaps have any outstanding writes, or has |
2126 | * the file grown beyond our last write? */ | |
a6b6d5b8 | 2127 | if (!nfs_have_writebacks(inode) || new_isize > cur_isize) { |
110cb2d2 | 2128 | trace_nfs_size_update(inode, new_isize); |
9e6e70f8 | 2129 | i_size_write(inode, new_isize); |
ca0daa27 | 2130 | if (!have_writers) |
16e14375 | 2131 | invalid |= NFS_INO_INVALID_DATA; |
9e6e70f8 | 2132 | } |
1da177e4 | 2133 | } |
4cdfeb64 TM |
2134 | if (new_isize == 0 && |
2135 | !(fattr->valid & (NFS_ATTR_FATTR_SPACE_USED | | |
2136 | NFS_ATTR_FATTR_BLOCKS_USED))) { | |
2137 | fattr->du.nfs3.used = 0; | |
2138 | fattr->valid |= NFS_ATTR_FATTR_SPACE_USED; | |
2139 | } | |
213bb584 | 2140 | } else |
cc7f2dae TM |
2141 | nfsi->cache_validity |= |
2142 | save_cache_validity & NFS_INO_INVALID_SIZE; | |
1da177e4 | 2143 | |
9e6e70f8 | 2144 | if (fattr->valid & NFS_ATTR_FATTR_ATIME) |
e86d5a02 | 2145 | inode->i_atime = fattr->atime; |
213bb584 | 2146 | else if (fattr_supported & NFS_ATTR_FATTR_ATIME) |
cc7f2dae TM |
2147 | nfsi->cache_validity |= |
2148 | save_cache_validity & NFS_INO_INVALID_ATIME; | |
1da177e4 | 2149 | |
9e6e70f8 TM |
2150 | if (fattr->valid & NFS_ATTR_FATTR_MODE) { |
2151 | if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) { | |
9b4b3513 TM |
2152 | umode_t newmode = inode->i_mode & S_IFMT; |
2153 | newmode |= fattr->mode & S_IALLUGO; | |
2154 | inode->i_mode = newmode; | |
16e14375 | 2155 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 2156 | | NFS_INO_INVALID_ACL; |
9e6e70f8 | 2157 | } |
213bb584 | 2158 | } else if (fattr_supported & NFS_ATTR_FATTR_MODE) |
cc7f2dae TM |
2159 | nfsi->cache_validity |= |
2160 | save_cache_validity & NFS_INO_INVALID_MODE; | |
62ab460c | 2161 | |
9e6e70f8 | 2162 | if (fattr->valid & NFS_ATTR_FATTR_OWNER) { |
9ff593c4 | 2163 | if (!uid_eq(inode->i_uid, fattr->uid)) { |
16e14375 | 2164 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 2165 | | NFS_INO_INVALID_ACL; |
9e6e70f8 TM |
2166 | inode->i_uid = fattr->uid; |
2167 | } | |
213bb584 | 2168 | } else if (fattr_supported & NFS_ATTR_FATTR_OWNER) |
cc7f2dae TM |
2169 | nfsi->cache_validity |= |
2170 | save_cache_validity & NFS_INO_INVALID_OTHER; | |
62ab460c | 2171 | |
9e6e70f8 | 2172 | if (fattr->valid & NFS_ATTR_FATTR_GROUP) { |
9ff593c4 | 2173 | if (!gid_eq(inode->i_gid, fattr->gid)) { |
16e14375 | 2174 | invalid |= NFS_INO_INVALID_ACCESS |
0b467264 | 2175 | | NFS_INO_INVALID_ACL; |
9e6e70f8 TM |
2176 | inode->i_gid = fattr->gid; |
2177 | } | |
213bb584 | 2178 | } else if (fattr_supported & NFS_ATTR_FATTR_GROUP) |
cc7f2dae TM |
2179 | nfsi->cache_validity |= |
2180 | save_cache_validity & NFS_INO_INVALID_OTHER; | |
921615f1 | 2181 | |
9e6e70f8 | 2182 | if (fattr->valid & NFS_ATTR_FATTR_NLINK) { |
36a10a3c | 2183 | if (inode->i_nlink != fattr->nlink) |
bfe86848 | 2184 | set_nlink(inode, fattr->nlink); |
213bb584 | 2185 | } else if (fattr_supported & NFS_ATTR_FATTR_NLINK) |
cc7f2dae TM |
2186 | nfsi->cache_validity |= |
2187 | save_cache_validity & NFS_INO_INVALID_NLINK; | |
1da177e4 | 2188 | |
9e6e70f8 | 2189 | if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) { |
1da177e4 LT |
2190 | /* |
2191 | * report the blocks in 512byte units | |
2192 | */ | |
2193 | inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); | |
213bb584 | 2194 | } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED) |
ce62b114 TM |
2195 | nfsi->cache_validity |= |
2196 | save_cache_validity & NFS_INO_INVALID_BLOCKS; | |
ce62b114 | 2197 | |
213bb584 | 2198 | if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED) |
9e6e70f8 | 2199 | inode->i_blocks = fattr->du.nfs2.blocks; |
213bb584 | 2200 | else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED) |
cc7f2dae TM |
2201 | nfsi->cache_validity |= |
2202 | save_cache_validity & NFS_INO_INVALID_BLOCKS; | |
1da177e4 LT |
2203 | |
2204 | /* Update attrtimeo value if we're out of the unstable period */ | |
0b467264 | 2205 | if (attr_changed) { |
91d5b470 | 2206 | nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); |
1da177e4 | 2207 | nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); |
3e7d950a | 2208 | nfsi->attrtimeo_timestamp = now; |
f5062003 | 2209 | /* Set barrier to be more recent than all outstanding updates */ |
4704f0e2 | 2210 | nfsi->attr_gencount = nfs_inc_attr_generation_counter(); |
6d2b2966 | 2211 | } else { |
ade14a7d TM |
2212 | if (cache_revalidated) { |
2213 | if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, | |
2214 | nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) { | |
2215 | nfsi->attrtimeo <<= 1; | |
2216 | if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode)) | |
2217 | nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode); | |
2218 | } | |
6d2b2966 TM |
2219 | nfsi->attrtimeo_timestamp = now; |
2220 | } | |
f5062003 | 2221 | /* Set the barrier to be more recent than this fattr */ |
9fdbfad1 | 2222 | if ((long)(fattr->gencount - nfsi->attr_gencount) > 0) |
f5062003 | 2223 | nfsi->attr_gencount = fattr->gencount; |
1da177e4 | 2224 | } |
c812012f | 2225 | |
1da177e4 LT |
2226 | /* Don't invalidate the data if we were to blame */ |
2227 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) | |
2228 | || S_ISLNK(inode->i_mode))) | |
2229 | invalid &= ~NFS_INO_INVALID_DATA; | |
c80d17c5 | 2230 | nfs_set_cache_invalid(inode, invalid); |
de242c0b | 2231 | |
1da177e4 | 2232 | return 0; |
b37b03b7 | 2233 | out_err: |
1da177e4 LT |
2234 | /* |
2235 | * No need to worry about unhashing the dentry, as the | |
2236 | * lookup validation will know that the inode is bad. | |
2237 | * (But we fall through to invalidate the caches.) | |
2238 | */ | |
93ce4af7 | 2239 | nfs_set_inode_stale_locked(inode); |
1da177e4 LT |
2240 | return -ESTALE; |
2241 | } | |
2242 | ||
f7b422b1 | 2243 | struct inode *nfs_alloc_inode(struct super_block *sb) |
1da177e4 LT |
2244 | { |
2245 | struct nfs_inode *nfsi; | |
fd60b288 | 2246 | nfsi = alloc_inode_sb(sb, nfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
2247 | if (!nfsi) |
2248 | return NULL; | |
55296809 CL |
2249 | nfsi->flags = 0UL; |
2250 | nfsi->cache_validity = 0UL; | |
89d77c8f | 2251 | #if IS_ENABLED(CONFIG_NFS_V4) |
e50a1c2e BF |
2252 | nfsi->nfs4_acl = NULL; |
2253 | #endif /* CONFIG_NFS_V4 */ | |
95ad37f9 FL |
2254 | #ifdef CONFIG_NFS_V4_2 |
2255 | nfsi->xattr_cache = NULL; | |
2256 | #endif | |
1da177e4 LT |
2257 | return &nfsi->vfs_inode; |
2258 | } | |
89d77c8f | 2259 | EXPORT_SYMBOL_GPL(nfs_alloc_inode); |
1da177e4 | 2260 | |
ca1a199e | 2261 | void nfs_free_inode(struct inode *inode) |
1da177e4 LT |
2262 | { |
2263 | kmem_cache_free(nfs_inode_cachep, NFS_I(inode)); | |
2264 | } | |
ca1a199e | 2265 | EXPORT_SYMBOL_GPL(nfs_free_inode); |
fa0d7e3d | 2266 | |
d75d5414 AM |
2267 | static inline void nfs4_init_once(struct nfs_inode *nfsi) |
2268 | { | |
89d77c8f | 2269 | #if IS_ENABLED(CONFIG_NFS_V4) |
d75d5414 AM |
2270 | INIT_LIST_HEAD(&nfsi->open_states); |
2271 | nfsi->delegation = NULL; | |
d75d5414 | 2272 | init_rwsem(&nfsi->rwsem); |
e5e94017 | 2273 | nfsi->layout = NULL; |
d75d5414 AM |
2274 | #endif |
2275 | } | |
f7b422b1 | 2276 | |
51cc5068 | 2277 | static void init_once(void *foo) |
1da177e4 | 2278 | { |
7e7ce2cc | 2279 | struct nfs_inode *nfsi = foo; |
1da177e4 | 2280 | |
a35afb83 | 2281 | inode_init_once(&nfsi->vfs_inode); |
a35afb83 CL |
2282 | INIT_LIST_HEAD(&nfsi->open_files); |
2283 | INIT_LIST_HEAD(&nfsi->access_cache_entry_lru); | |
2284 | INIT_LIST_HEAD(&nfsi->access_cache_inode_lru); | |
a35afb83 | 2285 | nfs4_init_once(nfsi); |
1da177e4 | 2286 | } |
20c2df83 | 2287 | |
f7b422b1 | 2288 | static int __init nfs_init_inodecache(void) |
1da177e4 LT |
2289 | { |
2290 | nfs_inode_cachep = kmem_cache_create("nfs_inode_cache", | |
2291 | sizeof(struct nfs_inode), | |
fffb60f9 | 2292 | 0, (SLAB_RECLAIM_ACCOUNT| |
5d097056 | 2293 | SLAB_MEM_SPREAD|SLAB_ACCOUNT), |
20c2df83 | 2294 | init_once); |
1da177e4 LT |
2295 | if (nfs_inode_cachep == NULL) |
2296 | return -ENOMEM; | |
2297 | ||
2298 | return 0; | |
2299 | } | |
2300 | ||
266bee88 | 2301 | static void nfs_destroy_inodecache(void) |
1da177e4 | 2302 | { |
8c0a8537 KS |
2303 | /* |
2304 | * Make sure all delayed rcu free inodes are flushed before we | |
2305 | * destroy cache. | |
2306 | */ | |
2307 | rcu_barrier(); | |
1a1d92c1 | 2308 | kmem_cache_destroy(nfs_inode_cachep); |
1da177e4 LT |
2309 | } |
2310 | ||
5746006f | 2311 | struct workqueue_struct *nfsiod_workqueue; |
89d77c8f | 2312 | EXPORT_SYMBOL_GPL(nfsiod_workqueue); |
5746006f TM |
2313 | |
2314 | /* | |
2315 | * start up the nfsiod workqueue | |
2316 | */ | |
2317 | static int nfsiod_start(void) | |
2318 | { | |
2319 | struct workqueue_struct *wq; | |
2320 | dprintk("RPC: creating workqueue nfsiod\n"); | |
bf701b76 | 2321 | wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0); |
5746006f TM |
2322 | if (wq == NULL) |
2323 | return -ENOMEM; | |
2324 | nfsiod_workqueue = wq; | |
2325 | return 0; | |
2326 | } | |
2327 | ||
2328 | /* | |
2329 | * Destroy the nfsiod workqueue | |
2330 | */ | |
2331 | static void nfsiod_stop(void) | |
2332 | { | |
2333 | struct workqueue_struct *wq; | |
2334 | ||
2335 | wq = nfsiod_workqueue; | |
2336 | if (wq == NULL) | |
2337 | return; | |
2338 | nfsiod_workqueue = NULL; | |
2339 | destroy_workqueue(wq); | |
2340 | } | |
2341 | ||
c7d03a00 | 2342 | unsigned int nfs_net_id; |
9e2e74db | 2343 | EXPORT_SYMBOL_GPL(nfs_net_id); |
1b340d01 SK |
2344 | |
2345 | static int nfs_net_init(struct net *net) | |
2346 | { | |
6b13168b | 2347 | nfs_clients_init(net); |
65b38851 | 2348 | return nfs_fs_proc_net_init(net); |
1b340d01 SK |
2349 | } |
2350 | ||
2351 | static void nfs_net_exit(struct net *net) | |
2352 | { | |
65b38851 | 2353 | nfs_fs_proc_net_exit(net); |
10b7a70c | 2354 | nfs_clients_exit(net); |
1b340d01 SK |
2355 | } |
2356 | ||
2357 | static struct pernet_operations nfs_net_ops = { | |
2358 | .init = nfs_net_init, | |
2359 | .exit = nfs_net_exit, | |
2360 | .id = &nfs_net_id, | |
2361 | .size = sizeof(struct nfs_net), | |
2362 | }; | |
2363 | ||
1da177e4 LT |
2364 | /* |
2365 | * Initialize NFS | |
2366 | */ | |
2367 | static int __init init_nfs_fs(void) | |
2368 | { | |
2369 | int err; | |
2370 | ||
996bc4f4 TM |
2371 | err = nfs_sysfs_init(); |
2372 | if (err < 0) | |
2373 | goto out10; | |
2374 | ||
1b340d01 | 2375 | err = register_pernet_subsys(&nfs_net_ops); |
e571cbf1 | 2376 | if (err < 0) |
89d77c8f | 2377 | goto out9; |
e571cbf1 | 2378 | |
5746006f TM |
2379 | err = nfsiod_start(); |
2380 | if (err) | |
89d77c8f | 2381 | goto out7; |
5746006f | 2382 | |
6aaca566 DH |
2383 | err = nfs_fs_proc_init(); |
2384 | if (err) | |
89d77c8f | 2385 | goto out6; |
6aaca566 | 2386 | |
1da177e4 LT |
2387 | err = nfs_init_nfspagecache(); |
2388 | if (err) | |
89d77c8f | 2389 | goto out5; |
1da177e4 LT |
2390 | |
2391 | err = nfs_init_inodecache(); | |
2392 | if (err) | |
89d77c8f | 2393 | goto out4; |
1da177e4 LT |
2394 | |
2395 | err = nfs_init_readpagecache(); | |
2396 | if (err) | |
89d77c8f | 2397 | goto out3; |
1da177e4 LT |
2398 | |
2399 | err = nfs_init_writepagecache(); | |
2400 | if (err) | |
89d77c8f | 2401 | goto out2; |
1da177e4 | 2402 | |
1da177e4 LT |
2403 | err = nfs_init_directcache(); |
2404 | if (err) | |
89d77c8f | 2405 | goto out1; |
1da177e4 | 2406 | |
ec7652aa | 2407 | rpc_proc_register(&init_net, &nfs_rpcstat); |
cd738ee9 KM |
2408 | |
2409 | err = register_nfs_fs(); | |
2410 | if (err) | |
129d1977 BS |
2411 | goto out0; |
2412 | ||
1da177e4 | 2413 | return 0; |
129d1977 | 2414 | out0: |
ec7652aa | 2415 | rpc_proc_unregister(&init_net, "nfs"); |
1da177e4 | 2416 | nfs_destroy_directcache(); |
89d77c8f | 2417 | out1: |
129d1977 | 2418 | nfs_destroy_writepagecache(); |
89d77c8f | 2419 | out2: |
129d1977 | 2420 | nfs_destroy_readpagecache(); |
89d77c8f | 2421 | out3: |
129d1977 | 2422 | nfs_destroy_inodecache(); |
89d77c8f | 2423 | out4: |
129d1977 | 2424 | nfs_destroy_nfspagecache(); |
89d77c8f | 2425 | out5: |
129d1977 | 2426 | nfs_fs_proc_exit(); |
89d77c8f | 2427 | out6: |
129d1977 | 2428 | nfsiod_stop(); |
89d77c8f | 2429 | out7: |
129d1977 | 2430 | unregister_pernet_subsys(&nfs_net_ops); |
89d77c8f | 2431 | out9: |
996bc4f4 TM |
2432 | nfs_sysfs_exit(); |
2433 | out10: | |
1da177e4 LT |
2434 | return err; |
2435 | } | |
2436 | ||
2437 | static void __exit exit_nfs_fs(void) | |
2438 | { | |
1da177e4 | 2439 | nfs_destroy_directcache(); |
1da177e4 LT |
2440 | nfs_destroy_writepagecache(); |
2441 | nfs_destroy_readpagecache(); | |
2442 | nfs_destroy_inodecache(); | |
2443 | nfs_destroy_nfspagecache(); | |
1b340d01 | 2444 | unregister_pernet_subsys(&nfs_net_ops); |
ec7652aa | 2445 | rpc_proc_unregister(&init_net, "nfs"); |
f7b422b1 | 2446 | unregister_nfs_fs(); |
6aaca566 | 2447 | nfs_fs_proc_exit(); |
5746006f | 2448 | nfsiod_stop(); |
996bc4f4 | 2449 | nfs_sysfs_exit(); |
1da177e4 LT |
2450 | } |
2451 | ||
2452 | /* Not quite true; I just maintain it */ | |
2453 | MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>"); | |
2454 | MODULE_LICENSE("GPL"); | |
f43bf0be | 2455 | module_param(enable_ino64, bool, 0644); |
1da177e4 LT |
2456 | |
2457 | module_init(init_nfs_fs) | |
2458 | module_exit(exit_nfs_fs) |