projects / linux-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'pm-6.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
[linux-block.git] / fs / nfs / inode.c
CommitLineData
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 63static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
f43bf0be 64
24aa1fe6 65static int nfs_update_inode(struct inode *, struct nfs_fattr *);
1da177e4 66
e18b890b 67static struct kmem_cache * nfs_inode_cachep;
b7fa0554 68
1da177e4
LT		 69static inline unsigned long
70nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
71{
72 return nfs_fileid_to_ino_t(fattr->fileid);
73}
74
f5d39b02 75int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
72cb77f4 76{
8d3ca331
TM		 77 if (unlikely(nfs_current_task_exiting()))
78 return -EINTR;
f5d39b02 79 schedule();
dfd01f02
PZ		 80 if (signal_pending_state(mode, current))
81 return -ERESTARTSYS;
72cb77f4
TM		 82 return 0;
83}
89d77c8f 84EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
72cb77f4 85
f43bf0be
TM		 86/**
87 * nfs_compat_user_ino64 - returns the user-visible inode number
88 * @fileid: 64-bit fileid
89 *
90 * This function returns a 32-bit inode number if the boot parameter
91 * nfs.enable_ino64 is zero.
92 */
93u64 nfs_compat_user_ino64(u64 fileid)
94{
3fa0b4e2
FF		 95#ifdef CONFIG_COMPAT
96 compat_ulong_t ino;
97#else
98 unsigned long ino;
99#endif
f43bf0be
TM		 100
101 if (enable_ino64)
102 return fileid;
103 ino = fileid;
104 if (sizeof(ino) < sizeof(fileid))
105 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
106 return ino;
107}
108
eed99357
TM		 109int nfs_drop_inode(struct inode *inode)
110{
111 return NFS_STALE(inode) || generic_drop_inode(inode);
112}
113EXPORT_SYMBOL_GPL(nfs_drop_inode);
114
19d87ca3 115void nfs_clear_inode(struct inode *inode)
1da177e4 116{
da6d503a
TM		 117 /*
118 * The following should never happen...
119 */
f48407dd
TM		 120 WARN_ON_ONCE(nfs_have_writebacks(inode));
121 WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
ada70d94 122 nfs_zap_acl_cache(inode);
1c3c07e9 123 nfs_access_zap_cache(inode);
f1fe29b4 124 nfs_fscache_clear_inode(inode);
1da177e4 125}
89d77c8f 126EXPORT_SYMBOL_GPL(nfs_clear_inode);
1da177e4 127
b57922d9
AV		 128void nfs_evict_inode(struct inode *inode)
129{
91b0abe3 130 truncate_inode_pages_final(&inode->i_data);
dbd5768f 131 clear_inode(inode);
b57922d9
AV		 132 nfs_clear_inode(inode);
133}
134
9e1681c2 135int nfs_sync_inode(struct inode *inode)
4d346bea 136{
95d9f6c3 137 inode_dio_wait(inode);
4d346bea
TM		 138 return nfs_wb_all(inode);
139}
9e1681c2 140EXPORT_SYMBOL_GPL(nfs_sync_inode);
4d346bea 141
29884df0
TM		 142/**
143 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
302fad7b 144 * @mapping: pointer to struct address_space
29884df0
TM		 145 */
146int nfs_sync_mapping(struct address_space *mapping)
147{
5cf95214 148 int ret = 0;
29884df0 149
5cf95214
TM		 150 if (mapping->nrpages != 0) {
151 unmap_mapping_range(mapping, 0, 0, 0);
152 ret = nfs_wb_all(mapping->host);
153 }
29884df0
TM		 154 return ret;
155}
156
187e593d
TM		 157static int nfs_attribute_timeout(struct inode *inode)
158{
159 struct nfs_inode *nfsi = NFS_I(inode);
160
161 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
162}
163
13c0b082
TM		 164static bool nfs_check_cache_flags_invalid(struct inode *inode,
165 unsigned long flags)
61540bf6
TM		 166{
167 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
168
61540bf6
TM		 169 return (cache_validity & flags) != 0;
170}
171
61540bf6
TM		 172bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
173{
13c0b082
TM		 174 if (nfs_check_cache_flags_invalid(inode, flags))
175 return true;
176 return nfs_attribute_cache_expired(inode);
61540bf6 177}
95ad37f9 178EXPORT_SYMBOL_GPL(nfs_check_cache_invalid);
61540bf6 179
848fdd62
TM		 180#ifdef CONFIG_NFS_V4_2
181static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
182{
183 return nfsi->xattr_cache != NULL;
184}
185#else
186static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
187{
188 return false;
189}
190#endif
191
fd6d3fee 192void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
6edf9609
TM		 193{
194 struct nfs_inode *nfsi = NFS_I(inode);
3f0b3cf4 195
4201916f 196 if (nfs_have_delegated_attributes(inode)) {
3f0b3cf4 197 if (!(flags & NFS_INO_REVAL_FORCED))
720869eb 198 flags &= ~(NFS_INO_INVALID_MODE |
cc7f2dae
TM		 199 NFS_INO_INVALID_OTHER |
200 NFS_INO_INVALID_XATTR);
201 flags &= ~(NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
41e97b7f 202 }
6edf9609 203
848fdd62
TM		 204 if (!nfs_has_xattr_cache(nfsi))
205 flags &= ~NFS_INO_INVALID_XATTR;
beab450d 206 if (flags & NFS_INO_INVALID_DATA)
a6b5a28e 207 nfs_fscache_invalidate(inode, 0);
41e97b7f 208 flags &= ~NFS_INO_REVAL_FORCED;
488796ec 209
867da60d
MS		 210 flags |= nfsi->cache_validity;
211 if (inode->i_mapping->nrpages == 0)
212 flags &= ~NFS_INO_INVALID_DATA;
488796ec 213
867da60d
MS		 214 /* pairs with nfs_clear_invalid_mapping()'s smp_load_acquire() */
215 smp_store_release(&nfsi->cache_validity, flags);
216
217 if (inode->i_mapping->nrpages == 0 ||
218 nfsi->cache_validity & NFS_INO_INVALID_DATA) {
3db63daa
N		 219 nfs_ooo_clear(nfsi);
220 }
93c2e5e0 221 trace_nfs_set_cache_invalid(inode, 0);
6edf9609 222}
b6f80a2e 223EXPORT_SYMBOL_GPL(nfs_set_cache_invalid);
6edf9609 224
1da177e4
LT		 225/*
226 * Invalidate the local caches
227 */
b37b03b7 228static void nfs_zap_caches_locked(struct inode *inode)
1da177e4
LT		 229{
230 struct nfs_inode *nfsi = NFS_I(inode);
231 int mode = inode->i_mode;
232
91d5b470
CL		 233 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
234
c7c20973
TM		 235 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
236 nfsi->attrtimeo_timestamp = jiffies;
1da177e4 237
88a6099f
TM		 238 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
239 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
240 NFS_INO_INVALID_DATA |
241 NFS_INO_INVALID_ACCESS |
242 NFS_INO_INVALID_ACL |
243 NFS_INO_INVALID_XATTR);
244 else
245 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
246 NFS_INO_INVALID_ACCESS |
247 NFS_INO_INVALID_ACL |
248 NFS_INO_INVALID_XATTR);
fd1defc2 249 nfs_zap_label_cache_locked(nfsi);
b37b03b7 250}
dc59250c 251
b37b03b7
TM		 252void nfs_zap_caches(struct inode *inode)
253{
254 spin_lock(&inode->i_lock);
255 nfs_zap_caches_locked(inode);
dc59250c 256 spin_unlock(&inode->i_lock);
ada70d94
TM		 257}
258
cd9ae2b6
TM		 259void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
260{
261 if (mapping->nrpages != 0) {
262 spin_lock(&inode->i_lock);
6edf9609 263 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
cd9ae2b6
TM		 264 spin_unlock(&inode->i_lock);
265 }
266}
267
f41f7418 268void nfs_zap_acl_cache(struct inode *inode)
ada70d94
TM		 269{
270 void (*clear_acl_cache)(struct inode *);
271
272 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
273 if (clear_acl_cache != NULL)
274 clear_acl_cache(inode);
dc59250c 275 spin_lock(&inode->i_lock);
55296809 276 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
dc59250c 277 spin_unlock(&inode->i_lock);
1da177e4 278}
1c606fb7 279EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
1da177e4 280
c4812998
TM		 281void nfs_invalidate_atime(struct inode *inode)
282{
e12912d9
TM		 283 if (nfs_have_delegated_atime(inode))
284 return;
c4812998 285 spin_lock(&inode->i_lock);
6edf9609 286 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
c4812998
TM		 287 spin_unlock(&inode->i_lock);
288}
ddda8e0a 289EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
c4812998 290
1da177e4 291/*
b37b03b7
TM		 292 * Invalidate, but do not unhash, the inode.
293 * NB: must be called with inode->i_lock held!
1da177e4 294 */
93ce4af7 295static void nfs_set_inode_stale_locked(struct inode *inode)
1da177e4 296{
3a10c30a 297 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
b37b03b7 298 nfs_zap_caches_locked(inode);
93ce4af7
TM		 299 trace_nfs_set_inode_stale(inode);
300}
301
302void nfs_set_inode_stale(struct inode *inode)
303{
304 spin_lock(&inode->i_lock);
305 nfs_set_inode_stale_locked(inode);
306 spin_unlock(&inode->i_lock);
1da177e4
LT		 307}
308
309struct nfs_find_desc {
310 struct nfs_fh *fh;
311 struct nfs_fattr *fattr;
312};
313
314/*
315 * In NFSv3 we can have 64bit inode numbers. In order to support
316 * this, and re-exported directories (also seen in NFSv2)
317 * we are forced to allow 2 different inodes to have the same
318 * i_ino.
319 */
320static int
321nfs_find_actor(struct inode *inode, void *opaque)
322{
7e7ce2cc 323 struct nfs_find_desc *desc = opaque;
1da177e4
LT		 324 struct nfs_fh *fh = desc->fh;
325 struct nfs_fattr *fattr = desc->fattr;
326
327 if (NFS_FILEID(inode) != fattr->fileid)
328 return 0;
6e3e2c43 329 if (inode_wrong_type(inode, fattr->mode))
f6488c9b 330 return 0;
1da177e4
LT		 331 if (nfs_compare_fh(NFS_FH(inode), fh))
332 return 0;
333 if (is_bad_inode(inode) || NFS_STALE(inode))
334 return 0;
335 return 1;
336}
337
338static int
339nfs_init_locked(struct inode *inode, void *opaque)
340{
7e7ce2cc 341 struct nfs_find_desc *desc = opaque;
1da177e4
LT		 342 struct nfs_fattr *fattr = desc->fattr;
343
99fadcd7 344 set_nfs_fileid(inode, fattr->fileid);
916ec34d 345 inode->i_mode = fattr->mode;
1da177e4
LT		 346 nfs_copy_fh(NFS_FH(inode), desc->fh);
347 return 0;
348}
349
e058f70b 350#ifdef CONFIG_NFS_V4_SECURITY_LABEL
fd1defc2
TM		 351static void nfs_clear_label_invalid(struct inode *inode)
352{
353 spin_lock(&inode->i_lock);
354 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
355 spin_unlock(&inode->i_lock);
356}
357
dd225cb3 358void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr)
aa9c2669
DQ		 359{
360 int error;
361
dd225cb3 362 if (fattr->label == NULL)
aa9c2669
DQ		 363 return;
364
aa9c2669 365 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
dd225cb3
AS		 366 error = security_inode_notifysecctx(inode, fattr->label->label,
367 fattr->label->len);
aa9c2669
DQ		 368 if (error)
369 printk(KERN_ERR "%s() %s %d "
370 "security_inode_notifysecctx() %d\n",
371 __func__,
dd225cb3
AS		 372 (char *)fattr->label->label,
373 fattr->label->len, error);
fd1defc2 374 nfs_clear_label_invalid(inode);
aa9c2669
DQ		 375 }
376}
377
e058f70b
SD		 378struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
379{
e48c81bb 380 struct nfs4_label *label;
e058f70b
SD		 381
382 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
e48c81bb 383 return NULL;
e058f70b
SD		 384
385 label = kzalloc(sizeof(struct nfs4_label), flags);
386 if (label == NULL)
387 return ERR_PTR(-ENOMEM);
388
389 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
390 if (label->label == NULL) {
391 kfree(label);
392 return ERR_PTR(-ENOMEM);
393 }
394 label->len = NFS4_MAXLABELLEN;
395
396 return label;
397}
398EXPORT_SYMBOL_GPL(nfs4_label_alloc);
aa9c2669 399#else
dd225cb3 400void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr)
aa9c2669
DQ		 401{
402}
e058f70b 403#endif
aa9c2669 404EXPORT_SYMBOL_GPL(nfs_setsecurity);
e058f70b 405
f174ff7a
PT		 406/* Search for inode identified by fh, fileid and i_mode in inode cache. */
407struct inode *
408nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
409{
410 struct nfs_find_desc desc = {
411 .fh = fh,
412 .fattr = fattr,
413 };
414 struct inode *inode;
415 unsigned long hash;
416
417 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
418 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
419 return NULL;
420
421 hash = nfs_fattr_to_ino_t(fattr);
422 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
423
424 dprintk("%s: returning %p\n", __func__, inode);
425 return inode;
426}
427
e591b298
TM		 428static void nfs_inode_init_regular(struct nfs_inode *nfsi)
429{
430 atomic_long_set(&nfsi->nrequests, 0);
67f4b5dc 431 atomic_long_set(&nfsi->redirtied_pages, 0);
e591b298
TM		 432 INIT_LIST_HEAD(&nfsi->commit_info.list);
433 atomic_long_set(&nfsi->commit_info.ncommit, 0);
434 atomic_set(&nfsi->commit_info.rpcs_out, 0);
435 mutex_init(&nfsi->commit_mutex);
436}
437
438static void nfs_inode_init_dir(struct nfs_inode *nfsi)
439{
440 nfsi->cache_change_attribute = 0;
441 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
442 init_rwsem(&nfsi->rmdir_sem);
443}
444
1da177e4
LT		 445/*
446 * This is our front-end to iget that looks up inodes by file handle
447 * instead of inode number.
448 */
449struct inode *
cf7ab00a 450nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
1da177e4
LT		 451{
452 struct nfs_find_desc desc = {
453 .fh = fh,
454 .fattr = fattr
455 };
03f28e3a 456 struct inode *inode = ERR_PTR(-ENOENT);
ce62b114 457 u64 fattr_supported = NFS_SB(sb)->fattr_valid;
1da177e4
LT		 458 unsigned long hash;
459
7ebb9315
BS		 460 nfs_attr_check_mountpoint(sb, fattr);
461
2ef47eb1
AS		 462 if (nfs_attr_use_mounted_on_fileid(fattr))
463 fattr->fileid = fattr->mounted_on_fileid;
464 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
1da177e4 465 goto out_no_inode;
9e6e70f8 466 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
1da177e4 467 goto out_no_inode;
1da177e4
LT		 468
469 hash = nfs_fattr_to_ino_t(fattr);
470
03f28e3a
TM		 471 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
472 if (inode == NULL) {
473 inode = ERR_PTR(-ENOMEM);
1da177e4 474 goto out_no_inode;
03f28e3a 475 }
1da177e4
LT		 476
477 if (inode->i_state & I_NEW) {
478 struct nfs_inode *nfsi = NFS_I(inode);
b0c4fddc 479 unsigned long now = jiffies;
1da177e4
LT		 480
481 /* We set i_ino for the few things that still rely on it,
482 * such as stat(2) */
483 inode->i_ino = hash;
484
485 /* We can't support update_atime(), since the server will reset it */
486 inode->i_flags |= S_NOATIME|S_NOCMTIME;
487 inode->i_mode = fattr->mode;
821a868a 488 nfsi->cache_validity = 0;
62ab460c 489 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
ce62b114 490 && (fattr_supported & NFS_ATTR_FATTR_MODE))
720869eb 491 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
1da177e4
LT		 492 /* Why so? Because we want revalidate for devices/FIFOs, and
493 * that's precisely what we have in nfs_file_inode_operations.
494 */
8fa5c000 495 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
1da177e4 496 if (S_ISREG(inode->i_mode)) {
1788ea6e 497 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
1da177e4 498 inode->i_data.a_ops = &nfs_file_aops;
e591b298 499 nfs_inode_init_regular(nfsi);
49b29a57 500 mapping_set_large_folios(inode->i_mapping);
1da177e4 501 } else if (S_ISDIR(inode->i_mode)) {
8fa5c000 502 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
1da177e4 503 inode->i_fop = &nfs_dir_operations;
11de3b11 504 inode->i_data.a_ops = &nfs_dir_aops;
e591b298 505 nfs_inode_init_dir(nfsi);
55a97593 506 /* Deal with crossing mountpoints */
7ebb9315
BS		 507 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
508 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
6b97fd3d
MN		 509 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
510 inode->i_op = &nfs_referral_inode_operations;
511 else
512 inode->i_op = &nfs_mountpoint_inode_operations;
55a97593 513 inode->i_fop = NULL;
36d43a43 514 inode->i_flags |= S_AUTOMOUNT;
55a97593 515 }
21fc61c7 516 } else if (S_ISLNK(inode->i_mode)) {
1da177e4 517 inode->i_op = &nfs_symlink_inode_operations;
21fc61c7
AV		 518 inode_nohighmem(inode);
519 } else
1da177e4
LT		 520 init_special_inode(inode, inode->i_mode, fattr->rdev);
521
41d581a9
JL		 522 inode_set_atime(inode, 0, 0);
523 inode_set_mtime(inode, 0, 0);
55e04e9c 524 inode_set_ctime(inode, 0, 0);
1eb5d98f 525 inode_set_iversion_raw(inode, 0);
9e6e70f8 526 inode->i_size = 0;
6d6b77f1 527 clear_nlink(inode);
9ff593c4
EB		 528 inode->i_uid = make_kuid(&init_user_ns, -2);
529 inode->i_gid = make_kgid(&init_user_ns, -2);
9e6e70f8 530 inode->i_blocks = 0;
2701d086
AA		 531 nfsi->write_io = 0;
532 nfsi->read_io = 0;
9e6e70f8 533
33801147 534 nfsi->read_cache_jiffies = fattr->time_start;
4704f0e2 535 nfsi->attr_gencount = fattr->gencount;
9e6e70f8 536 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
41d581a9 537 inode_set_atime_to_ts(inode, fattr->atime);
ce62b114 538 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
16e14375 539 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
9e6e70f8 540 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
41d581a9 541 inode_set_mtime_to_ts(inode, fattr->mtime);
ce62b114 542 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
16e14375 543 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
9e6e70f8 544 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 545 inode_set_ctime_to_ts(inode, fattr->ctime);
ce62b114 546 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
16e14375 547 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
9e6e70f8 548 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1eb5d98f 549 inode_set_iversion_raw(inode, fattr->change_attr);
cd812599 550 else
16e14375 551 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
9e6e70f8
TM		 552 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
553 inode->i_size = nfs_size_to_loff_t(fattr->size);
62ab460c 554 else
16e14375 555 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
9e6e70f8 556 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
bfe86848 557 set_nlink(inode, fattr->nlink);
ce62b114 558 else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
fabf2b34 559 nfs_set_cache_invalid(inode, NFS_INO_INVALID_NLINK);
3a306535
HY		 560 else
561 set_nlink(inode, 1);
9e6e70f8
TM		 562 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
563 inode->i_uid = fattr->uid;
ce62b114 564 else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
16e14375 565 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
9e6e70f8
TM		 566 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
567 inode->i_gid = fattr->gid;
ce62b114 568 else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
16e14375 569 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
9e6e70f8
TM		 570 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
571 inode->i_blocks = fattr->du.nfs2.blocks;
ce62b114
TM		 572 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED &&
573 fattr->size != 0)
574 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
9e6e70f8 575 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 576 /*
577 * report the blocks in 512byte units
578 */
579 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
ce62b114
TM		 580 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED &&
581 fattr->size != 0)
4cdfeb64 582 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
821a868a 583
dd225cb3 584 nfs_setsecurity(inode, fattr);
aa9c2669 585
1da177e4 586 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
b0c4fddc 587 nfsi->attrtimeo_timestamp = now;
1c3c07e9 588 nfsi->access_cache = RB_ROOT;
1da177e4 589
f1fe29b4 590 nfs_fscache_init_inode(inode);
ef79c097 591
1da177e4 592 unlock_new_inode(inode);
26fde4df
N		 593 } else {
594 int err = nfs_refresh_inode(inode, fattr);
595 if (err < 0) {
596 iput(inode);
597 inode = ERR_PTR(err);
598 goto out_no_inode;
599 }
600 }
1e8968c5 601 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
1da177e4 602 inode->i_sb->s_id,
1e8968c5 603 (unsigned long long)NFS_FILEID(inode),
4f1abd22 604 nfs_display_fhandle_hash(fh),
1da177e4
LT		 605 atomic_read(&inode->i_count));
606
607out:
608 return inode;
609
610out_no_inode:
03f28e3a 611 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
1da177e4
LT		 612 goto out;
613}
89d77c8f 614EXPORT_SYMBOL_GPL(nfs_fhget);
1da177e4 615
0a741f59
TM		 616static void
617nfs_fattr_fixup_delegated(struct inode *inode, struct nfs_fattr *fattr)
618{
619 unsigned long cache_validity = NFS_I(inode)->cache_validity;
620
621 if (nfs_have_delegated_mtime(inode)) {
622 if (!(cache_validity & NFS_INO_INVALID_CTIME))
623 fattr->valid &= ~(NFS_ATTR_FATTR_PRECTIME |
624 NFS_ATTR_FATTR_CTIME);
625
626 if (!(cache_validity & NFS_INO_INVALID_MTIME))
627 fattr->valid &= ~(NFS_ATTR_FATTR_PREMTIME |
628 NFS_ATTR_FATTR_MTIME);
629
630 if (!(cache_validity & NFS_INO_INVALID_ATIME))
631 fattr->valid &= ~NFS_ATTR_FATTR_ATIME;
632 } else if (nfs_have_delegated_atime(inode)) {
633 if (!(cache_validity & NFS_INO_INVALID_ATIME))
634 fattr->valid &= ~NFS_ATTR_FATTR_ATIME;
635 }
636}
637
aba41e90
SG		 638static void nfs_set_timestamps_to_ts(struct inode *inode, struct iattr *attr)
639{
640 unsigned int cache_flags = 0;
641
642 if (attr->ia_valid & ATTR_MTIME_SET) {
643 struct timespec64 ctime = inode_get_ctime(inode);
644 struct timespec64 mtime = inode_get_mtime(inode);
645 struct timespec64 now;
646 int updated = 0;
647
648 now = inode_set_ctime_current(inode);
649 if (!timespec64_equal(&now, &ctime))
650 updated |= S_CTIME;
651
652 inode_set_mtime_to_ts(inode, attr->ia_mtime);
653 if (!timespec64_equal(&now, &mtime))
654 updated |= S_MTIME;
655
656 inode_maybe_inc_iversion(inode, updated);
657 cache_flags |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME;
658 }
659 if (attr->ia_valid & ATTR_ATIME_SET) {
660 inode_set_atime_to_ts(inode, attr->ia_atime);
661 cache_flags |= NFS_INO_INVALID_ATIME;
662 }
663 NFS_I(inode)->cache_validity &= ~cache_flags;
664}
665
40f45ab3
TM		 666static void nfs_update_timestamps(struct inode *inode, unsigned int ia_valid)
667{
668 enum file_time_flags time_flags = 0;
669 unsigned int cache_flags = 0;
670
671 if (ia_valid & ATTR_MTIME) {
672 time_flags |= S_MTIME | S_CTIME;
673 cache_flags |= NFS_INO_INVALID_CTIME | NFS_INO_INVALID_MTIME;
674 }
675 if (ia_valid & ATTR_ATIME) {
676 time_flags |= S_ATIME;
677 cache_flags |= NFS_INO_INVALID_ATIME;
678 }
679 inode_update_timestamps(inode, time_flags);
680 NFS_I(inode)->cache_validity &= ~cache_flags;
681}
682
e12912d9
TM		 683void nfs_update_delegated_atime(struct inode *inode)
684{
685 spin_lock(&inode->i_lock);
40f45ab3
TM		 686 if (nfs_have_delegated_atime(inode))
687 nfs_update_timestamps(inode, ATTR_ATIME);
e12912d9
TM		 688 spin_unlock(&inode->i_lock);
689}
690
691void nfs_update_delegated_mtime_locked(struct inode *inode)
692{
40f45ab3
TM		 693 if (nfs_have_delegated_mtime(inode))
694 nfs_update_timestamps(inode, ATTR_MTIME);
e12912d9
TM		 695}
696
697void nfs_update_delegated_mtime(struct inode *inode)
698{
699 spin_lock(&inode->i_lock);
700 nfs_update_delegated_mtime_locked(inode);
701 spin_unlock(&inode->i_lock);
702}
703EXPORT_SYMBOL_GPL(nfs_update_delegated_mtime);
704
536e43d1 705#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		 706
707int
c1632a0f 708nfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
549c7297 709 struct iattr *attr)
1da177e4 710{
2b0143b5 711 struct inode *inode = d_inode(dentry);
987f8dfc 712 struct nfs_fattr *fattr;
ae57ca0f 713 int error = 0;
1da177e4 714
91d5b470
CL		 715 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
716
188b95dd
JL		 717 /* skip mode change if it's just for clearing setuid/setgid */
718 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
719 attr->ia_valid &= ~ATTR_MODE;
720
1da177e4 721 if (attr->ia_valid & ATTR_SIZE) {
08a899d5
CH		 722 BUG_ON(!S_ISREG(inode->i_mode));
723
ae57ca0f
KM		 724 error = inode_newsize_ok(inode, attr->ia_size);
725 if (error)
726 return error;
727
728 if (attr->ia_size == i_size_read(inode))
1da177e4
LT		 729 attr->ia_valid &= ~ATTR_SIZE;
730 }
731
40f45ab3
TM		 732 if (nfs_have_delegated_mtime(inode) && attr->ia_valid & ATTR_MTIME) {
733 spin_lock(&inode->i_lock);
aba41e90
SG		 734 if (attr->ia_valid & ATTR_MTIME_SET) {
735 nfs_set_timestamps_to_ts(inode, attr);
736 attr->ia_valid &= ~(ATTR_MTIME|ATTR_MTIME_SET|
737 ATTR_ATIME|ATTR_ATIME_SET);
738 } else {
739 nfs_update_timestamps(inode, attr->ia_valid);
740 attr->ia_valid &= ~(ATTR_MTIME|ATTR_ATIME);
741 }
40f45ab3 742 spin_unlock(&inode->i_lock);
40f45ab3
TM		 743 } else if (nfs_have_delegated_atime(inode) &&
744 attr->ia_valid & ATTR_ATIME &&
745 !(attr->ia_valid & ATTR_MTIME)) {
aba41e90
SG		 746 if (attr->ia_valid & ATTR_ATIME_SET) {
747 spin_lock(&inode->i_lock);
748 nfs_set_timestamps_to_ts(inode, attr);
749 spin_unlock(&inode->i_lock);
750 attr->ia_valid &= ~(ATTR_ATIME|ATTR_ATIME_SET);
751 } else {
752 nfs_update_delegated_atime(inode);
753 attr->ia_valid &= ~ATTR_ATIME;
754 }
e12912d9
TM		 755 }
756
1da177e4 757 /* Optimization: if the end result is no change, don't RPC */
1f9f4328 758 if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0)
1da177e4
LT		 759 return 0;
760
f4ce1299
TM		 761 trace_nfs_setattr_enter(inode);
762
755c1e20 763 /* Write all dirty data */
4d346bea
TM		 764 if (S_ISREG(inode->i_mode))
765 nfs_sync_inode(inode);
987f8dfc 766
1b00ad65 767 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
ae57ca0f
KM		 768 if (fattr == NULL) {
769 error = -ENOMEM;
987f8dfc 770 goto out;
ae57ca0f
KM		 771 }
772
987f8dfc 773 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
65e4308d 774 if (error == 0)
aa9c2669 775 error = nfs_refresh_inode(inode, fattr);
987f8dfc
TM		 776 nfs_free_fattr(fattr);
777out:
f4ce1299 778 trace_nfs_setattr_exit(inode, error);
65e4308d
TM		 779 return error;
780}
ddda8e0a 781EXPORT_SYMBOL_GPL(nfs_setattr);
65e4308d 782
a3d01454
TM		 783/**
784 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
785 * @inode: inode of the file used
786 * @offset: file offset to start truncating
787 *
788 * This is a copy of the common vmtruncate, but with the locking
789 * corrected to take into account the fact that NFS requires
790 * inode->i_size to be updated under the inode->i_lock.
f044636d 791 * Note: must be called with inode->i_lock held!
a3d01454
TM		 792 */
793static int nfs_vmtruncate(struct inode * inode, loff_t offset)
794{
c08d3b0e 795 int err;
a3d01454 796
c08d3b0e 797 err = inode_newsize_ok(inode, offset);
798 if (err)
799 goto out;
a3d01454 800
110cb2d2 801 trace_nfs_size_truncate(inode, offset);
c08d3b0e 802 i_size_write(inode, offset);
6edf9609 803 /* Optimisation */
3db63daa
N		 804 if (offset == 0) {
805 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA;
806 nfs_ooo_clear(NFS_I(inode));
807 }
f6cdfa6d 808 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
c08d3b0e 809
f044636d 810 spin_unlock(&inode->i_lock);
7caef267 811 truncate_pagecache(inode, offset);
e12912d9 812 nfs_update_delegated_mtime_locked(inode);
f044636d 813 spin_lock(&inode->i_lock);
c08d3b0e 814out:
815 return err;
a3d01454
TM		 816}
817
65e4308d
TM		 818/**
819 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
820 * @inode: pointer to struct inode
821 * @attr: pointer to struct iattr
16e14375 822 * @fattr: pointer to struct nfs_fattr
65e4308d
TM		 823 *
824 * Note: we do this in the *proc.c in order to ensure that
825 * it works for things like exclusive creates too.
826 */
f044636d
TM		 827void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
828 struct nfs_fattr *fattr)
65e4308d 829{
f044636d
TM		 830 /* Barrier: bump the attribute generation count. */
831 nfs_fattr_set_barrier(fattr);
832
833 spin_lock(&inode->i_lock);
834 NFS_I(inode)->attr_gencount = fattr->gencount;
6a97d02d 835 if ((attr->ia_valid & ATTR_SIZE) != 0) {
e12912d9
TM		 836 if (!nfs_have_delegated_mtime(inode))
837 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
838 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
6a97d02d
TM		 839 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
840 nfs_vmtruncate(inode, attr->ia_size);
841 }
65e4308d 842 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
6a97d02d 843 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
1f9f4328
TM		 844 if ((attr->ia_valid & ATTR_KILL_SUID) != 0 &&
845 inode->i_mode & S_ISUID)
846 inode->i_mode &= ~S_ISUID;
4f704d9a 847 if (setattr_should_drop_sgid(&nop_mnt_idmap, inode))
1f9f4328 848 inode->i_mode &= ~S_ISGID;
1da177e4 849 if ((attr->ia_valid & ATTR_MODE) != 0) {
65e4308d
TM		 850 int mode = attr->ia_mode & S_IALLUGO;
851 mode |= inode->i_mode & ~S_IALLUGO;
1da177e4
LT		 852 inode->i_mode = mode;
853 }
854 if ((attr->ia_valid & ATTR_UID) != 0)
855 inode->i_uid = attr->ia_uid;
856 if ((attr->ia_valid & ATTR_GID) != 0)
857 inode->i_gid = attr->ia_gid;
6a97d02d 858 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 859 inode_set_ctime_to_ts(inode, fattr->ctime);
6a97d02d
TM		 860 else
861 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
862 | NFS_INO_INVALID_CTIME);
6edf9609
TM		 863 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
864 | NFS_INO_INVALID_ACL);
65e4308d 865 }
6a97d02d
TM		 866 if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
867 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
868 | NFS_INO_INVALID_CTIME);
869 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
41d581a9 870 inode_set_atime_to_ts(inode, fattr->atime);
6a97d02d 871 else if (attr->ia_valid & ATTR_ATIME_SET)
41d581a9 872 inode_set_atime_to_ts(inode, attr->ia_atime);
6a97d02d
TM		 873 else
874 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
875
876 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 877 inode_set_ctime_to_ts(inode, fattr->ctime);
6a97d02d
TM		 878 else
879 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
880 | NFS_INO_INVALID_CTIME);
881 }
882 if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
883 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
884 | NFS_INO_INVALID_CTIME);
885 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
41d581a9 886 inode_set_mtime_to_ts(inode, fattr->mtime);
6a97d02d 887 else if (attr->ia_valid & ATTR_MTIME_SET)
41d581a9 888 inode_set_mtime_to_ts(inode, attr->ia_mtime);
6a97d02d
TM		 889 else
890 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
891
892 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 893 inode_set_ctime_to_ts(inode, fattr->ctime);
6a97d02d
TM		 894 else
895 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
896 | NFS_INO_INVALID_CTIME);
65e4308d 897 }
616c3196
JL		 898 if (fattr->valid)
899 nfs_update_inode(inode, fattr);
f044636d 900 spin_unlock(&inode->i_lock);
1da177e4 901}
ddda8e0a 902EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
1da177e4 903
ad1e109a
TM		 904/*
905 * Don't request help from readdirplus if the file is being written to,
906 * or if attribute caching is turned off
907 */
908static bool nfs_getattr_readdirplus_enable(const struct inode *inode)
311324ad 909{
ad1e109a
TM		 910 return nfs_server_capable(inode, NFS_CAP_READDIRPLUS) &&
911 !nfs_have_writebacks(inode) && NFS_MAXATTRTIMEO(inode) > 5 * HZ;
912}
311324ad 913
ad1e109a
TM		 914static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
915{
916 if (!IS_ROOT(dentry)) {
917 struct dentry *parent = dget_parent(dentry);
918 nfs_readdir_record_entry_cache_miss(d_inode(parent));
919 dput(parent);
920 }
311324ad
TM		 921}
922
1bcf4c5c
TM		 923static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
924{
ad1e109a
TM		 925 if (!IS_ROOT(dentry)) {
926 struct dentry *parent = dget_parent(dentry);
927 nfs_readdir_record_entry_cache_hit(d_inode(parent));
928 dput(parent);
929 }
1bcf4c5c
TM		 930}
931
63cdd7ed 932static u32 nfs_get_valid_attrmask(struct inode *inode)
311324ad 933{
63cdd7ed
TM		 934 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
935 u32 reply_mask = STATX_INO | STATX_TYPE;
936
937 if (!(cache_validity & NFS_INO_INVALID_ATIME))
938 reply_mask |= STATX_ATIME;
13c0b082
TM		 939 if (!(cache_validity & NFS_INO_INVALID_CTIME))
940 reply_mask |= STATX_CTIME;
941 if (!(cache_validity & NFS_INO_INVALID_MTIME))
942 reply_mask |= STATX_MTIME;
943 if (!(cache_validity & NFS_INO_INVALID_SIZE))
944 reply_mask |= STATX_SIZE;
fabf2b34
TM		 945 if (!(cache_validity & NFS_INO_INVALID_NLINK))
946 reply_mask |= STATX_NLINK;
720869eb
TM		 947 if (!(cache_validity & NFS_INO_INVALID_MODE))
948 reply_mask |= STATX_MODE;
63cdd7ed 949 if (!(cache_validity & NFS_INO_INVALID_OTHER))
720869eb 950 reply_mask |= STATX_UID | STATX_GID;
63cdd7ed
TM		 951 if (!(cache_validity & NFS_INO_INVALID_BLOCKS))
952 reply_mask |= STATX_BLOCKS;
61a968b4
JL		 953 if (!(cache_validity & NFS_INO_INVALID_CHANGE))
954 reply_mask |= STATX_CHANGE_COOKIE;
63cdd7ed 955 return reply_mask;
311324ad
TM		 956}
957
b74d24f7 958int nfs_getattr(struct mnt_idmap *idmap, const struct path *path,
549c7297 959 struct kstat *stat, u32 request_mask, unsigned int query_flags)
1da177e4 960{
a528d35e 961 struct inode *inode = d_inode(path->dentry);
9ccee940
TM		 962 struct nfs_server *server = NFS_SERVER(inode);
963 unsigned long cache_validity;
16caf5b6 964 int err = 0;
9ccee940
TM		 965 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
966 bool do_update = false;
ad1e109a 967 bool readdirplus_enabled = nfs_getattr_readdirplus_enable(inode);
1da177e4 968
f4ce1299 969 trace_nfs_getattr_enter(inode);
9ccee940 970
4eb6a823
TM		 971 request_mask &= STATX_TYPE | STATX_MODE | STATX_NLINK | STATX_UID |
972 STATX_GID | STATX_ATIME | STATX_MTIME | STATX_CTIME |
cded49ba 973 STATX_INO | STATX_SIZE | STATX_BLOCKS |
61a968b4 974 STATX_CHANGE_COOKIE;
4eb6a823 975
ac7cbb22 976 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
ad1e109a
TM		 977 if (readdirplus_enabled)
978 nfs_readdirplus_parent_cache_hit(path->dentry);
63cdd7ed 979 goto out_no_revalidate;
ac7cbb22 980 }
9ccee940 981
61a968b4
JL		 982 /* Flush out writes to the server in order to update c/mtime/version. */
983 if ((request_mask & (STATX_CTIME | STATX_MTIME | STATX_CHANGE_COOKIE)) &&
e12912d9
TM		 984 S_ISREG(inode->i_mode)) {
985 if (nfs_have_delegated_mtime(inode))
986 filemap_fdatawrite(inode->i_mapping);
987 else
988 filemap_write_and_wait(inode->i_mapping);
989 }
fc33a7bb
CH		 990
991 /*
992 * We may force a getattr if the user cares about atime.
993 *
994 * Note that we only have to check the vfsmount flags here:
995 * - NFS always sets S_NOATIME by so checking it would give a
996 * bogus result
1751e8a6 997 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
fc33a7bb
CH		 998 * no point in checking those.
999 */
a528d35e
DH		 1000 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
1001 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
9ccee940
TM		 1002 request_mask &= ~STATX_ATIME;
1003
1004 /* Is the user requesting attributes that might need revalidation? */
1005 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
1006 STATX_MTIME|STATX_UID|STATX_GID|
61a968b4
JL		 1007 STATX_SIZE|STATX_BLOCKS|
1008 STATX_CHANGE_COOKIE)))
9ccee940
TM		 1009 goto out_no_revalidate;
1010
1011 /* Check whether the cached attributes are stale */
1012 do_update |= force_sync || nfs_attribute_cache_expired(inode);
1013 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
e8764a6f 1014 do_update |= cache_validity & NFS_INO_INVALID_CHANGE;
9ccee940
TM		 1015 if (request_mask & STATX_ATIME)
1016 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
e8764a6f
TM		 1017 if (request_mask & STATX_CTIME)
1018 do_update |= cache_validity & NFS_INO_INVALID_CTIME;
1019 if (request_mask & STATX_MTIME)
1020 do_update |= cache_validity & NFS_INO_INVALID_MTIME;
1021 if (request_mask & STATX_SIZE)
1022 do_update |= cache_validity & NFS_INO_INVALID_SIZE;
fabf2b34
TM		 1023 if (request_mask & STATX_NLINK)
1024 do_update |= cache_validity & NFS_INO_INVALID_NLINK;
720869eb
TM		 1025 if (request_mask & STATX_MODE)
1026 do_update |= cache_validity & NFS_INO_INVALID_MODE;
1027 if (request_mask & (STATX_UID | STATX_GID))
e8764a6f 1028 do_update |= cache_validity & NFS_INO_INVALID_OTHER;
3a39e778
ZB		 1029 if (request_mask & STATX_BLOCKS)
1030 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
63cdd7ed 1031
9ccee940 1032 if (do_update) {
ad1e109a 1033 if (readdirplus_enabled)
59b86d85 1034 nfs_readdirplus_parent_cache_miss(path->dentry);
311324ad 1035 err = __nfs_revalidate_inode(server, inode);
9ccee940
TM		 1036 if (err)
1037 goto out;
ad1e109a 1038 } else if (readdirplus_enabled)
a528d35e 1039 nfs_readdirplus_parent_cache_hit(path->dentry);
9ccee940
TM		 1040out_no_revalidate:
1041 /* Only return attributes that were revalidated. */
63cdd7ed
TM		 1042 stat->result_mask = nfs_get_valid_attrmask(inode) | request_mask;
1043
0d72b928 1044 generic_fillattr(&nop_mnt_idmap, request_mask, inode, stat);
9ccee940 1045 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
61a968b4
JL		 1046 stat->change_cookie = inode_peek_iversion_raw(inode);
1047 stat->attributes_mask |= STATX_ATTR_CHANGE_MONOTONIC;
1048 if (server->change_attr_type != NFS4_CHANGE_TYPE_IS_UNDEFINED)
1049 stat->attributes |= STATX_ATTR_CHANGE_MONOTONIC;
9ccee940
TM		 1050 if (S_ISDIR(inode->i_mode))
1051 stat->blksize = NFS_SERVER(inode)->dtsize;
acdc53b2 1052out:
f4ce1299 1053 trace_nfs_getattr_exit(inode, err);
1da177e4
LT		 1054 return err;
1055}
ddda8e0a 1056EXPORT_SYMBOL_GPL(nfs_getattr);
1da177e4 1057
f11ac8db
TM		 1058static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
1059{
2f62b5aa 1060 refcount_set(&l_ctx->count, 1);
d51fdb87 1061 l_ctx->lockowner = current->files;
f11ac8db 1062 INIT_LIST_HEAD(&l_ctx->list);
210c7c17 1063 atomic_set(&l_ctx->io_count, 0);
f11ac8db
TM		 1064}
1065
1066static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
1067{
1db97eaa 1068 struct nfs_lock_context *pos;
f11ac8db 1069
1db97eaa 1070 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
d51fdb87 1071 if (pos->lockowner != current->files)
f11ac8db 1072 continue;
1db97eaa
TM		 1073 if (refcount_inc_not_zero(&pos->count))
1074 return pos;
1075 }
f11ac8db
TM		 1076 return NULL;
1077}
1078
1079struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
1080{
1081 struct nfs_lock_context *res, *new = NULL;
2b0143b5 1082 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 1083
1db97eaa 1084 rcu_read_lock();
f11ac8db 1085 res = __nfs_find_lock_context(ctx);
1db97eaa 1086 rcu_read_unlock();
f11ac8db 1087 if (res == NULL) {
d7867712 1088 new = kmalloc(sizeof(*new), GFP_KERNEL_ACCOUNT);
f11ac8db 1089 if (new == NULL)
b3c54de6 1090 return ERR_PTR(-ENOMEM);
f11ac8db
TM		 1091 nfs_init_lock_context(new);
1092 spin_lock(&inode->i_lock);
1093 res = __nfs_find_lock_context(ctx);
1094 if (res == NULL) {
15494511
TM		 1095 new->open_context = get_nfs_open_context(ctx);
1096 if (new->open_context) {
1097 list_add_tail_rcu(&new->list,
1098 &ctx->lock_context.list);
1099 res = new;
1100 new = NULL;
1101 } else
1102 res = ERR_PTR(-EBADF);
f11ac8db 1103 }
1db97eaa
TM		 1104 spin_unlock(&inode->i_lock);
1105 kfree(new);
f11ac8db 1106 }
f11ac8db
TM		 1107 return res;
1108}
1c6dcbe5 1109EXPORT_SYMBOL_GPL(nfs_get_lock_context);
f11ac8db
TM		 1110
1111void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
1112{
1113 struct nfs_open_context *ctx = l_ctx->open_context;
2b0143b5 1114 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 1115
2f62b5aa 1116 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
f11ac8db 1117 return;
1db97eaa 1118 list_del_rcu(&l_ctx->list);
f11ac8db 1119 spin_unlock(&inode->i_lock);
15494511 1120 put_nfs_open_context(ctx);
1db97eaa 1121 kfree_rcu(l_ctx, rcu_head);
f11ac8db 1122}
1c6dcbe5 1123EXPORT_SYMBOL_GPL(nfs_put_lock_context);
f11ac8db 1124
7fe5c398
TM		 1125/**
1126 * nfs_close_context - Common close_context() routine NFSv2/v3
1127 * @ctx: pointer to context
1128 * @is_sync: is this a synchronous close
1129 *
5cf9d706
TM		 1130 * Ensure that the attributes are up to date if we're mounted
1131 * with close-to-open semantics and we have cached data that will
1132 * need to be revalidated on open.
7fe5c398
TM		 1133 */
1134void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
1135{
5cf9d706 1136 struct nfs_inode *nfsi;
7fe5c398 1137 struct inode *inode;
7fe5c398
TM		 1138
1139 if (!(ctx->mode & FMODE_WRITE))
1140 return;
1141 if (!is_sync)
1142 return;
2b0143b5 1143 inode = d_inode(ctx->dentry);
4201916f 1144 if (nfs_have_read_or_write_delegation(inode))
58ff4184 1145 return;
5cf9d706
TM		 1146 nfsi = NFS_I(inode);
1147 if (inode->i_mapping->nrpages == 0)
1148 return;
1149 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1150 return;
1151 if (!list_empty(&nfsi->open_files))
7fe5c398 1152 return;
1f3208b2 1153 if (NFS_SERVER(inode)->flags & NFS_MOUNT_NOCTO)
7fe5c398 1154 return;
1f3208b2
TM		 1155 nfs_revalidate_inode(inode,
1156 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
7fe5c398 1157}
ddda8e0a 1158EXPORT_SYMBOL_GPL(nfs_close_context);
7fe5c398 1159
532d4def
N		 1160struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
1161 fmode_t f_mode,
1162 struct file *filp)
1da177e4
LT		 1163{
1164 struct nfs_open_context *ctx;
1165
d7867712 1166 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL_ACCOUNT);
1d179d6b 1167 if (!ctx)
5ede7b1c 1168 return ERR_PTR(-ENOMEM);
5ede7b1c
AV		 1169 nfs_sb_active(dentry->d_sb);
1170 ctx->dentry = dget(dentry);
1d179d6b
TM		 1171 if (filp)
1172 ctx->cred = get_cred(filp->f_cred);
1173 else
1174 ctx->cred = get_current_cred();
ca05cbae 1175 rcu_assign_pointer(ctx->ll_cred, NULL);
5ede7b1c
AV		 1176 ctx->state = NULL;
1177 ctx->mode = f_mode;
1178 ctx->flags = 0;
1179 ctx->error = 0;
532d4def 1180 ctx->flock_owner = (fl_owner_t)filp;
5ede7b1c
AV		 1181 nfs_init_lock_context(&ctx->lock_context);
1182 ctx->lock_context.open_context = ctx;
1183 INIT_LIST_HEAD(&ctx->list);
82be417a 1184 ctx->mdsthreshold = NULL;
86e00412
MS		 1185 nfs_localio_file_init(&ctx->nfl);
1186
1da177e4
LT		 1187 return ctx;
1188}
89d77c8f 1189EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
1da177e4
LT		 1190
1191struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1192{
0de43976
TM		 1193 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
1194 return ctx;
1195 return NULL;
1da177e4 1196}
89d77c8f 1197EXPORT_SYMBOL_GPL(get_nfs_open_context);
1da177e4 1198
7fe5c398 1199static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
1da177e4 1200{
2b0143b5 1201 struct inode *inode = d_inode(ctx->dentry);
3d4ff43d 1202 struct super_block *sb = ctx->dentry->d_sb;
3bec63db 1203
0de43976
TM		 1204 if (!refcount_dec_and_test(&ctx->lock_context.count))
1205 return;
5c78f58e 1206 if (!list_empty(&ctx->list)) {
0de43976
TM		 1207 spin_lock(&inode->i_lock);
1208 list_del_rcu(&ctx->list);
ef84303e 1209 spin_unlock(&inode->i_lock);
0de43976 1210 }
5c78f58e
TM		 1211 if (inode != NULL)
1212 NFS_PROTO(inode)->close_context(ctx, is_sync);
a52458b4 1213 put_cred(ctx->cred);
3d4ff43d 1214 dput(ctx->dentry);
322b2b90 1215 nfs_sb_deactive(sb);
ca05cbae 1216 put_rpccred(rcu_dereference_protected(ctx->ll_cred, 1));
82be417a 1217 kfree(ctx->mdsthreshold);
86e00412 1218 nfs_close_local_fh(&ctx->nfl);
0de43976 1219 kfree_rcu(ctx, rcu_head);
3bec63db
TM		 1220}
1221
a49c3c77
TM		 1222void put_nfs_open_context(struct nfs_open_context *ctx)
1223{
1224 __put_nfs_open_context(ctx, 0);
1225}
89d77c8f 1226EXPORT_SYMBOL_GPL(put_nfs_open_context);
a49c3c77 1227
4eae5014
TM		 1228static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1229{
1230 __put_nfs_open_context(ctx, 1);
1231}
1232
1da177e4
LT		 1233/*
1234 * Ensure that mmap has a recent RPC credential for use when writing out
1235 * shared pages
1236 */
c45ffdd2 1237void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1da177e4 1238{
2b0143b5 1239 struct inode *inode = d_inode(ctx->dentry);
1da177e4
LT		 1240 struct nfs_inode *nfsi = NFS_I(inode);
1241
1da177e4 1242 spin_lock(&inode->i_lock);
1c341b77 1243 if (list_empty(&nfsi->open_files) &&
3db63daa 1244 nfs_ooo_test(nfsi))
ac46b3d7
TM		 1245 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA |
1246 NFS_INO_REVAL_FORCED);
0de43976 1247 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1da177e4
LT		 1248 spin_unlock(&inode->i_lock);
1249}
c45ffdd2
TM		 1250EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1251
1252void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1253{
1254 filp->private_data = get_nfs_open_context(ctx);
e97bc663 1255 set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
c45ffdd2
TM		 1256 if (list_empty(&ctx->list))
1257 nfs_inode_attach_open_context(ctx);
1258}
89d77c8f 1259EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1da177e4 1260
d530838b
TM		 1261/*
1262 * Given an inode, search for an open context with the desired characteristics
1263 */
a52458b4 1264struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1da177e4
LT		 1265{
1266 struct nfs_inode *nfsi = NFS_I(inode);
1267 struct nfs_open_context *pos, *ctx = NULL;
1268
0de43976
TM		 1269 rcu_read_lock();
1270 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
65f51603 1271 if (cred != NULL && cred_fscmp(pos->cred, cred) != 0)
d530838b 1272 continue;
1544fa0f
TM		 1273 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1274 continue;
e97bc663
TM		 1275 if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags))
1276 continue;
1544fa0f 1277 ctx = get_nfs_open_context(pos);
0de43976
TM		 1278 if (ctx)
1279 break;
1da177e4 1280 }
0de43976 1281 rcu_read_unlock();
1da177e4
LT		 1282 return ctx;
1283}
1284
aff8d8dc 1285void nfs_file_clear_open_context(struct file *filp)
1da177e4 1286{
cd3758e3 1287 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1da177e4
LT		 1288
1289 if (ctx) {
2b0143b5 1290 struct inode *inode = d_inode(ctx->dentry);
c45ffdd2 1291
e97bc663 1292 clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
0bcbf039
PT		 1293 /*
1294 * We fatal error on write before. Try to writeback
1295 * every page again.
1296 */
1297 if (ctx->error < 0)
1298 invalidate_inode_pages2(inode->i_mapping);
1da177e4 1299 filp->private_data = NULL;
4eae5014 1300 put_nfs_open_context_sync(ctx);
1da177e4
LT		 1301 }
1302}
1303
1304/*
1305 * These allocate and release file read/write context information.
1306 */
1307int nfs_open(struct inode *inode, struct file *filp)
1308{
1309 struct nfs_open_context *ctx;
1da177e4 1310
6f1c1d95
C		 1311 ctx = alloc_nfs_open_context(file_dentry(filp),
1312 flags_to_mode(filp->f_flags), filp);
5ede7b1c
AV		 1313 if (IS_ERR(ctx))
1314 return PTR_ERR(ctx);
1da177e4
LT		 1315 nfs_file_set_open_context(filp, ctx);
1316 put_nfs_open_context(ctx);
f1fe29b4 1317 nfs_fscache_open_file(inode, filp);
1da177e4
LT		 1318 return 0;
1319}
1320
1da177e4
LT		 1321/*
1322 * This function is called whenever some part of NFS notices that
1323 * the cached attributes have to be refreshed.
1324 */
1325int
1326__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1327{
1328 int status = -ESTALE;
a3cba2aa 1329 struct nfs_fattr *fattr = NULL;
1da177e4 1330 struct nfs_inode *nfsi = NFS_I(inode);
1da177e4 1331
1e8968c5
NV		 1332 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1333 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1da177e4 1334
f4ce1299
TM		 1335 trace_nfs_revalidate_inode_enter(inode);
1336
85233a7a 1337 if (is_bad_inode(inode))
691beb13 1338 goto out;
1da177e4 1339 if (NFS_STALE(inode))
412d582e 1340 goto out;
7fdc49c4 1341
ac46bd37
TM		 1342 /* pNFS: Attributes aren't updated until we layoutcommit */
1343 if (S_ISREG(inode->i_mode)) {
1344 status = pnfs_sync_inode(inode, false);
1345 if (status)
1346 goto out;
1347 }
1348
a3cba2aa 1349 status = -ENOMEM;
2ef61e0e 1350 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
a3cba2aa
TM		 1351 if (fattr == NULL)
1352 goto out;
1353
691beb13 1354 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
14c43f76 1355
2ef61e0e 1356 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, inode);
1da177e4 1357 if (status != 0) {
1e8968c5 1358 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1da177e4 1359 inode->i_sb->s_id,
1e8968c5 1360 (unsigned long long)NFS_FILEID(inode), status);
c74dfe97
TM		 1361 switch (status) {
1362 case -ETIMEDOUT:
1363 /* A soft timeout occurred. Use cached information? */
1364 if (server->flags & NFS_MOUNT_SOFTREVAL)
1365 status = 0;
1366 break;
1367 case -ESTALE:
1da177e4 1368 if (!S_ISDIR(inode->i_mode))
93ce4af7
TM		 1369 nfs_set_inode_stale(inode);
1370 else
1371 nfs_zap_caches(inode);
1da177e4 1372 }
2ef61e0e 1373 goto out;
1da177e4
LT		 1374 }
1375
a3cba2aa 1376 status = nfs_refresh_inode(inode, fattr);
1da177e4 1377 if (status) {
1e8968c5 1378 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1da177e4 1379 inode->i_sb->s_id,
1e8968c5 1380 (unsigned long long)NFS_FILEID(inode), status);
2ef61e0e 1381 goto out;
1da177e4 1382 }
55296809 1383
24aa1fe6 1384 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
ada70d94 1385 nfs_zap_acl_cache(inode);
55296809 1386
dd225cb3 1387 nfs_setsecurity(inode, fattr);
3da580aa 1388
1e8968c5 1389 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1da177e4 1390 inode->i_sb->s_id,
1e8968c5 1391 (unsigned long long)NFS_FILEID(inode));
1da177e4 1392
14c43f76 1393out:
a3cba2aa 1394 nfs_free_fattr(fattr);
f4ce1299 1395 trace_nfs_revalidate_inode_exit(inode, status);
1da177e4
LT		 1396 return status;
1397}
1398
43f291cd 1399int nfs_attribute_cache_expired(struct inode *inode)
d7cf8dd0 1400{
b4d2314b 1401 if (nfs_have_delegated_attributes(inode))
1da177e4 1402 return 0;
d7cf8dd0 1403 return nfs_attribute_timeout(inode);
1da177e4
LT		 1404}
1405
1406/**
1407 * nfs_revalidate_inode - Revalidate the inode attributes
302fad7b 1408 * @inode: pointer to inode struct
1f3208b2 1409 * @flags: cache flags to check
1da177e4
LT		 1410 *
1411 * Updates inode attribute information by retrieving the data from the server.
1412 */
1f3208b2 1413int nfs_revalidate_inode(struct inode *inode, unsigned long flags)
1da177e4 1414{
1f3208b2 1415 if (!nfs_check_cache_invalid(inode, flags))
1da177e4 1416 return NFS_STALE(inode) ? -ESTALE : 0;
1f3208b2 1417 return __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1da177e4 1418}
1c606fb7 1419EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1da177e4 1420
1cda707d 1421static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
717d44e8 1422{
f8806c84
TM		 1423 int ret;
1424
a6b5a28e 1425 nfs_fscache_invalidate(inode, 0);
717d44e8 1426 if (mapping->nrpages != 0) {
f8806c84
TM		 1427 if (S_ISREG(inode->i_mode)) {
1428 ret = nfs_sync_mapping(mapping);
1429 if (ret < 0)
1430 return ret;
1431 }
1432 ret = invalidate_inode_pages2(mapping);
717d44e8
TM		 1433 if (ret < 0)
1434 return ret;
1435 }
717d44e8 1436 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
f4ce1299 1437
1e8968c5
NV		 1438 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1439 inode->i_sb->s_id,
1440 (unsigned long long)NFS_FILEID(inode));
717d44e8
TM		 1441 return 0;
1442}
1443
717d44e8 1444/**
28aa2f9e 1445 * nfs_clear_invalid_mapping - Conditionally clear a mapping
302fad7b 1446 * @mapping: pointer to mapping
28aa2f9e
TM		 1447 *
1448 * If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping.
717d44e8 1449 */
28aa2f9e 1450int nfs_clear_invalid_mapping(struct address_space *mapping)
717d44e8 1451{
28aa2f9e 1452 struct inode *inode = mapping->host;
717d44e8 1453 struct nfs_inode *nfsi = NFS_I(inode);
d529ef83 1454 unsigned long *bitlock = &nfsi->flags;
717d44e8 1455 int ret = 0;
dc59250c 1456
d529ef83
JL		 1457 /*
1458 * We must clear NFS_INO_INVALID_DATA first to ensure that
1459 * invalidations that come in while we're shooting down the mappings
1460 * are respected. But, that leaves a race window where one revalidator
1461 * can clear the flag, and then another checks it before the mapping
1462 * gets invalidated. Fix that by serializing access to this part of
1463 * the function.
1464 *
1465 * At the same time, we need to allow other tasks to see whether we
1466 * might be in the middle of invalidating the pages, so we only set
1467 * the bit lock here if it looks like we're going to be doing that.
1468 */
1469 for (;;) {
74316201 1470 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
f5d39b02
PZ		 1471 nfs_wait_bit_killable,
1472 TASK_KILLABLE|TASK_FREEZABLE_UNSAFE);
d529ef83
JL		 1473 if (ret)
1474 goto out;
867da60d
MS		 1475 smp_rmb(); /* pairs with smp_wmb() below */
1476 if (test_bit(NFS_INO_INVALIDATING, bitlock))
1477 continue;
1478 /* pairs with nfs_set_cache_invalid()'s smp_store_release() */
1479 if (!(smp_load_acquire(&nfsi->cache_validity) & NFS_INO_INVALID_DATA))
1480 goto out;
1481 /* Slow-path that double-checks with spinlock held */
17dfeb91
TM		 1482 spin_lock(&inode->i_lock);
1483 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1484 spin_unlock(&inode->i_lock);
1485 continue;
1486 }
1487 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
d529ef83 1488 break;
d529ef83 1489 spin_unlock(&inode->i_lock);
17dfeb91 1490 goto out;
f4ce1299
TM		 1491 }
1492
17dfeb91 1493 set_bit(NFS_INO_INVALIDATING, bitlock);
4db72b40 1494 smp_wmb();
3db63daa
N		 1495 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
1496 nfs_ooo_clear(nfsi);
17dfeb91
TM		 1497 spin_unlock(&inode->i_lock);
1498 trace_nfs_invalidate_mapping_enter(inode);
be527494 1499 ret = nfs_invalidate_mapping(inode, mapping);
17dfeb91
TM		 1500 trace_nfs_invalidate_mapping_exit(inode, ret);
1501
d529ef83 1502 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
4e857c58 1503 smp_mb__after_atomic();
d529ef83 1504 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
cd9ae2b6 1505out:
44b11874 1506 return ret;
7d52e862
TM		 1507}
1508
28aa2f9e
TM		 1509bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1510{
13c0b082 1511 return nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE) ||
28aa2f9e
TM		 1512 NFS_STALE(inode);
1513}
1514
1515int nfs_revalidate_mapping_rcu(struct inode *inode)
1516{
1517 struct nfs_inode *nfsi = NFS_I(inode);
1518 unsigned long *bitlock = &nfsi->flags;
1519 int ret = 0;
1520
1521 if (IS_SWAPFILE(inode))
1522 goto out;
1523 if (nfs_mapping_need_revalidate_inode(inode)) {
1524 ret = -ECHILD;
1525 goto out;
1526 }
1527 spin_lock(&inode->i_lock);
1528 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1529 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1530 ret = -ECHILD;
1531 spin_unlock(&inode->i_lock);
1532out:
1533 return ret;
1534}
1535
1536/**
1537 * nfs_revalidate_mapping - Revalidate the pagecache
1538 * @inode: pointer to host inode
1539 * @mapping: pointer to mapping
1540 */
1541int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1542{
1543 /* swapfiles are not supposed to be shared. */
1544 if (IS_SWAPFILE(inode))
1545 return 0;
1546
1547 if (nfs_mapping_need_revalidate_inode(inode)) {
1548 int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1549 if (ret < 0)
1550 return ret;
1551 }
1552
1553 return nfs_clear_invalid_mapping(mapping);
1554}
1555
ca0daa27 1556static bool nfs_file_has_writers(struct nfs_inode *nfsi)
874f9463 1557{
ca0daa27
TM		 1558 struct inode *inode = &nfsi->vfs_inode;
1559
ca0daa27
TM		 1560 if (!S_ISREG(inode->i_mode))
1561 return false;
1562 if (list_empty(&nfsi->open_files))
1563 return false;
6ba0c4e5 1564 return inode_is_open_for_write(inode);
874f9463
TM		 1565}
1566
651b0e70 1567static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
874f9463 1568{
651b0e70 1569 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
874f9463
TM		 1570}
1571
783b194c 1572static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
a895b4a1 1573{
e86d5a02 1574 struct timespec64 ts;
95582b00 1575
9e6e70f8
TM		 1576 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1577 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
c472c07b 1578 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1eb5d98f 1579 inode_set_iversion_raw(inode, fattr->change_attr);
70ca8852 1580 if (S_ISDIR(inode->i_mode))
6edf9609 1581 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
0f44da51
FL		 1582 else if (nfs_server_capable(inode, NFS_CAP_XATTR))
1583 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
70ca8852 1584 }
a895b4a1 1585 /* If we have atomic WCC data, we may update some attributes */
55e04e9c 1586 ts = inode_get_ctime(inode);
9e6e70f8
TM		 1587 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1588 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 1589 && timespec64_equal(&ts, &fattr->pre_ctime)) {
55e04e9c 1590 inode_set_ctime_to_ts(inode, fattr->ctime);
27dc1cd3 1591 }
9e6e70f8 1592
41d581a9 1593 ts = inode_get_mtime(inode);
9e6e70f8
TM		 1594 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1595 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 1596 && timespec64_equal(&ts, &fattr->pre_mtime)) {
41d581a9 1597 inode_set_mtime_to_ts(inode, fattr->mtime);
a895b4a1 1598 }
9e6e70f8
TM		 1599 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1600 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1601 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
a6b6d5b8 1602 && !nfs_have_writebacks(inode)) {
110cb2d2 1603 trace_nfs_size_wcc(inode, fattr->size);
27dc1cd3 1604 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
27dc1cd3 1605 }
a895b4a1
TM		 1606}
1607
1da177e4 1608/**
33801147 1609 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
302fad7b
TM		 1610 * @inode: pointer to inode
1611 * @fattr: updated attributes
1da177e4
LT		 1612 *
1613 * Verifies the attribute cache. If we have just changed the attributes,
1614 * so that fattr carries weak cache consistency data, then it may
1615 * also update the ctime/mtime/change_attribute.
1616 */
33801147 1617static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1da177e4
LT		 1618{
1619 struct nfs_inode *nfsi = NFS_I(inode);
1620 loff_t cur_size, new_isize;
2a3f5fd4 1621 unsigned long invalid = 0;
e86d5a02 1622 struct timespec64 ts;
dc59250c 1623
4201916f 1624 if (nfs_have_delegated_attributes(inode))
01da47bd 1625 return 0;
4ebe83af 1626
eb3d8f42
TM		 1627 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1628 /* Only a mounted-on-fileid? Just exit */
1629 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1630 return 0;
ca62b9c3 1631 /* Has the inode gone and changed behind our back? */
eb3d8f42 1632 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 1633 /* Is this perhaps the mounted-on fileid? */
1634 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1635 nfsi->fileid == fattr->mounted_on_fileid)
1636 return 0;
cc89684c 1637 return -ESTALE;
7e10cc25 1638 }
6e3e2c43 1639 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode))
cc89684c 1640 return -ESTALE;
ca62b9c3 1641
7e10cc25 1642
651b0e70 1643 if (!nfs_file_has_buffered_writers(nfsi)) {
ca0daa27 1644 /* Verify a few of the more important attributes */
c472c07b 1645 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
04c63498 1646 invalid |= NFS_INO_INVALID_CHANGE;
1da177e4 1647
41d581a9 1648 ts = inode_get_mtime(inode);
e86d5a02 1649 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
16e14375 1650 invalid |= NFS_INO_INVALID_MTIME;
ca62b9c3 1651
55e04e9c 1652 ts = inode_get_ctime(inode);
e86d5a02 1653 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
16e14375 1654 invalid |= NFS_INO_INVALID_CTIME;
ca0daa27
TM		 1655
1656 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1657 cur_size = i_size_read(inode);
1658 new_isize = nfs_size_to_loff_t(fattr->size);
1659 if (cur_size != new_isize)
04c63498 1660 invalid |= NFS_INO_INVALID_SIZE;
ca0daa27 1661 }
9e6e70f8 1662 }
1da177e4
LT		 1663
1664 /* Have any file permissions changed? */
9e6e70f8 1665 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
04c63498 1666 invalid |= NFS_INO_INVALID_MODE;
9ff593c4 1667 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
04c63498 1668 invalid |= NFS_INO_INVALID_OTHER;
9ff593c4 1669 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
04c63498 1670 invalid |= NFS_INO_INVALID_OTHER;
1da177e4
LT		 1671
1672 /* Has the link count changed? */
9e6e70f8 1673 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
fabf2b34 1674 invalid |= NFS_INO_INVALID_NLINK;
1da177e4 1675
41d581a9 1676 ts = inode_get_atime(inode);
e86d5a02 1677 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
2a3f5fd4
TM		 1678 invalid |= NFS_INO_INVALID_ATIME;
1679
1680 if (invalid != 0)
4ebe83af 1681 nfs_set_cache_invalid(inode, invalid);
1da177e4 1682
33801147 1683 nfsi->read_cache_jiffies = fattr->time_start;
1da177e4
LT		 1684 return 0;
1685}
1686
ae05f269 1687static atomic_long_t nfs_attr_generation_counter;
4704f0e2
TM		 1688
1689static unsigned long nfs_read_attr_generation_counter(void)
1690{
ae05f269 1691 return atomic_long_read(&nfs_attr_generation_counter);
4704f0e2
TM		 1692}
1693
1694unsigned long nfs_inc_attr_generation_counter(void)
1695{
ae05f269 1696 return atomic_long_inc_return(&nfs_attr_generation_counter);
4704f0e2 1697}
3235b403 1698EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
4704f0e2
TM		 1699
1700void nfs_fattr_init(struct nfs_fattr *fattr)
1701{
1702 fattr->valid = 0;
1703 fattr->time_start = jiffies;
1704 fattr->gencount = nfs_inc_attr_generation_counter();
6926afd1
TM		 1705 fattr->owner_name = NULL;
1706 fattr->group_name = NULL;
dc270d71 1707 fattr->mdsthreshold = NULL;
4704f0e2 1708}
ddda8e0a 1709EXPORT_SYMBOL_GPL(nfs_fattr_init);
4704f0e2 1710
140e049c
TM		 1711/**
1712 * nfs_fattr_set_barrier
1713 * @fattr: attributes
1714 *
1715 * Used to set a barrier after an attribute was updated. This
1716 * barrier ensures that older attributes from RPC calls that may
1717 * have raced with our update cannot clobber these new values.
1718 * Note that you are still responsible for ensuring that other
1719 * operations which change the attribute on the server do not
1720 * collide.
1721 */
1722void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1723{
1724 fattr->gencount = nfs_inc_attr_generation_counter();
1725}
1726
2d36bfde
TM		 1727struct nfs_fattr *nfs_alloc_fattr(void)
1728{
1729 struct nfs_fattr *fattr;
1730
da48f267 1731 fattr = kmalloc(sizeof(*fattr), GFP_KERNEL);
d4a95a7e 1732 if (fattr != NULL) {
2d36bfde 1733 nfs_fattr_init(fattr);
d4a95a7e
TM		 1734 fattr->label = NULL;
1735 }
2d36bfde
TM		 1736 return fattr;
1737}
ddda8e0a 1738EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
2d36bfde 1739
d755ad8d
AS		 1740struct nfs_fattr *nfs_alloc_fattr_with_label(struct nfs_server *server)
1741{
1742 struct nfs_fattr *fattr = nfs_alloc_fattr();
1743
1744 if (!fattr)
1745 return NULL;
1746
da48f267 1747 fattr->label = nfs4_label_alloc(server, GFP_KERNEL);
d755ad8d
AS		 1748 if (IS_ERR(fattr->label)) {
1749 kfree(fattr);
1750 return NULL;
1751 }
1752
1753 return fattr;
1754}
1755EXPORT_SYMBOL_GPL(nfs_alloc_fattr_with_label);
1756
2d36bfde
TM		 1757struct nfs_fh *nfs_alloc_fhandle(void)
1758{
1759 struct nfs_fh *fh;
1760
da48f267 1761 fh = kmalloc(sizeof(struct nfs_fh), GFP_KERNEL);
2d36bfde
TM		 1762 if (fh != NULL)
1763 fh->size = 0;
1764 return fh;
1765}
ddda8e0a 1766EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
2d36bfde 1767
e27d359e 1768#ifdef NFS_DEBUG
d8e0539e
WAA		 1769/*
1770 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1771 * in the same way that wireshark does
1772 *
1773 * @fh: file handle
1774 *
1775 * For debugging only.
1776 */
1777u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1778{
1779 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1780 * not on the result */
1264a2f0 1781 return nfs_fhandle_hash(fh);
d8e0539e 1782}
9e6ee76d 1783EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
d8e0539e
WAA		 1784
1785/*
20d27e92
CL		 1786 * _nfs_display_fhandle - display an NFS file handle on the console
1787 *
1788 * @fh: file handle to display
1789 * @caption: display caption
1790 *
1791 * For debugging only.
1792 */
20d27e92
CL		 1793void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1794{
1795 unsigned short i;
1796
fa68a1ba 1797 if (fh == NULL || fh->size == 0) {
20d27e92
CL		 1798 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1799 return;
1800 }
1801
d8e0539e
WAA		 1802 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1803 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
20d27e92
CL		 1804 for (i = 0; i < fh->size; i += 16) {
1805 __be32 *pos = (__be32 *)&fh->data[i];
1806
1807 switch ((fh->size - i - 1) >> 2) {
1808 case 0:
1809 printk(KERN_DEFAULT " %08x\n",
1810 be32_to_cpup(pos));
1811 break;
1812 case 1:
1813 printk(KERN_DEFAULT " %08x %08x\n",
1814 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1815 break;
1816 case 2:
1817 printk(KERN_DEFAULT " %08x %08x %08x\n",
1818 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1819 be32_to_cpup(pos + 2));
1820 break;
1821 default:
1822 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1823 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1824 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1825 }
1826 }
1827}
9e6ee76d 1828EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
20d27e92
CL		 1829#endif
1830
a10ad176 1831/**
6f9be83d 1832 * nfs_inode_attrs_cmp_generic - compare attributes
302fad7b 1833 * @fattr: attributes
302fad7b 1834 * @inode: pointer to inode
a10ad176
TM		 1835 *
1836 * Attempt to divine whether or not an RPC call reply carrying stale
1837 * attributes got scheduled after another call carrying updated ones.
4704f0e2 1838 * Note also the check for wraparound of 'attr_gencount'
a10ad176 1839 *
6f9be83d
TM		 1840 * The function returns '1' if it thinks the attributes in @fattr are
1841 * more recent than the ones cached in @inode. Otherwise it returns
1842 * the value '0'.
a10ad176 1843 */
6f9be83d
TM		 1844static int nfs_inode_attrs_cmp_generic(const struct nfs_fattr *fattr,
1845 const struct inode *inode)
a10ad176 1846{
9fdbfad1 1847 unsigned long attr_gencount = NFS_I(inode)->attr_gencount;
a10ad176 1848
9fdbfad1
TM		 1849 return (long)(fattr->gencount - attr_gencount) > 0 ||
1850 (long)(attr_gencount - nfs_read_attr_generation_counter()) > 0;
a10ad176
TM		 1851}
1852
6f9be83d
TM		 1853/**
1854 * nfs_inode_attrs_cmp_monotonic - compare attributes
302fad7b 1855 * @fattr: attributes
6f9be83d 1856 * @inode: pointer to inode
a10ad176
TM		 1857 *
1858 * Attempt to divine whether or not an RPC call reply carrying stale
1859 * attributes got scheduled after another call carrying updated ones.
1860 *
6f9be83d
TM		 1861 * We assume that the server observes monotonic semantics for
1862 * the change attribute, so a larger value means that the attributes in
1863 * @fattr are more recent, in which case the function returns the
1864 * value '1'.
1865 * A return value of '0' indicates no measurable change
1866 * A return value of '-1' means that the attributes in @inode are
1867 * more recent.
1868 */
1869static int nfs_inode_attrs_cmp_monotonic(const struct nfs_fattr *fattr,
1870 const struct inode *inode)
a10ad176 1871{
6f9be83d
TM		 1872 s64 diff = fattr->change_attr - inode_peek_iversion_raw(inode);
1873 if (diff > 0)
1874 return 1;
1875 return diff == 0 ? 0 : -1;
1876}
1877
1878/**
1879 * nfs_inode_attrs_cmp_strict_monotonic - compare attributes
1880 * @fattr: attributes
1881 * @inode: pointer to inode
a10ad176 1882 *
6f9be83d
TM		 1883 * Attempt to divine whether or not an RPC call reply carrying stale
1884 * attributes got scheduled after another call carrying updated ones.
a10ad176 1885 *
6f9be83d
TM		 1886 * We assume that the server observes strictly monotonic semantics for
1887 * the change attribute, so a larger value means that the attributes in
1888 * @fattr are more recent, in which case the function returns the
1889 * value '1'.
1890 * A return value of '-1' means that the attributes in @inode are
1891 * more recent or unchanged.
a10ad176 1892 */
6f9be83d
TM		 1893static int nfs_inode_attrs_cmp_strict_monotonic(const struct nfs_fattr *fattr,
1894 const struct inode *inode)
a10ad176 1895{
6f9be83d
TM		 1896 return nfs_inode_attrs_cmp_monotonic(fattr, inode) > 0 ? 1 : -1;
1897}
a10ad176 1898
6f9be83d
TM		 1899/**
1900 * nfs_inode_attrs_cmp - compare attributes
1901 * @fattr: attributes
1902 * @inode: pointer to inode
1903 *
1904 * This function returns '1' if it thinks the attributes in @fattr are
1905 * more recent than the ones cached in @inode. It returns '-1' if
1906 * the attributes in @inode are more recent than the ones in @fattr,
1907 * and it returns 0 if not sure.
1908 */
1909static int nfs_inode_attrs_cmp(const struct nfs_fattr *fattr,
1910 const struct inode *inode)
1911{
1912 if (nfs_inode_attrs_cmp_generic(fattr, inode) > 0)
1913 return 1;
1914 switch (NFS_SERVER(inode)->change_attr_type) {
1915 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
1916 break;
1917 case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
1918 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1919 break;
1920 return nfs_inode_attrs_cmp_monotonic(fattr, inode);
1921 default:
1922 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1923 break;
1924 return nfs_inode_attrs_cmp_strict_monotonic(fattr, inode);
1925 }
1926 return 0;
1927}
1928
7b24dacf
TM		 1929/**
1930 * nfs_inode_finish_partial_attr_update - complete a previous inode update
1931 * @fattr: attributes
1932 * @inode: pointer to inode
1933 *
1934 * Returns '1' if the last attribute update left the inode cached
1935 * attributes in a partially unrevalidated state, and @fattr
1936 * matches the change attribute of that partial update.
1937 * Otherwise returns '0'.
1938 */
1939static int nfs_inode_finish_partial_attr_update(const struct nfs_fattr *fattr,
1940 const struct inode *inode)
1941{
1942 const unsigned long check_valid =
1943 NFS_INO_INVALID_ATIME | NFS_INO_INVALID_CTIME |
1944 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
1945 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_OTHER |
1946 NFS_INO_INVALID_NLINK;
1947 unsigned long cache_validity = NFS_I(inode)->cache_validity;
eea41330 1948 enum nfs4_change_attr_type ctype = NFS_SERVER(inode)->change_attr_type;
7b24dacf 1949
eea41330
TM		 1950 if (ctype != NFS4_CHANGE_TYPE_IS_UNDEFINED &&
1951 !(cache_validity & NFS_INO_INVALID_CHANGE) &&
7b24dacf
TM		 1952 (cache_validity & check_valid) != 0 &&
1953 (fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1954 nfs_inode_attrs_cmp_monotonic(fattr, inode) == 0)
1955 return 1;
1956 return 0;
a10ad176
TM		 1957}
1958
3db63daa
N		 1959static void nfs_ooo_merge(struct nfs_inode *nfsi,
1960 u64 start, u64 end)
1961{
1962 int i, cnt;
1963
1964 if (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER)
1965 /* No point merging anything */
1966 return;
1967
1968 if (!nfsi->ooo) {
1969 nfsi->ooo = kmalloc(sizeof(*nfsi->ooo), GFP_ATOMIC);
1970 if (!nfsi->ooo) {
1971 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1972 return;
1973 }
1974 nfsi->ooo->cnt = 0;
1975 }
1976
1977 /* add this range, merging if possible */
1978 cnt = nfsi->ooo->cnt;
1979 for (i = 0; i < cnt; i++) {
1980 if (end == nfsi->ooo->gap[i].start)
1981 end = nfsi->ooo->gap[i].end;
1982 else if (start == nfsi->ooo->gap[i].end)
1983 start = nfsi->ooo->gap[i].start;
1984 else
1985 continue;
1986 /* Remove 'i' from table and loop to insert the new range */
1987 cnt -= 1;
1988 nfsi->ooo->gap[i] = nfsi->ooo->gap[cnt];
1989 i = -1;
1990 }
1991 if (start != end) {
1992 if (cnt >= ARRAY_SIZE(nfsi->ooo->gap)) {
1993 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1994 kfree(nfsi->ooo);
1995 nfsi->ooo = NULL;
1996 return;
1997 }
1998 nfsi->ooo->gap[cnt].start = start;
1999 nfsi->ooo->gap[cnt].end = end;
2000 cnt += 1;
2001 }
2002 nfsi->ooo->cnt = cnt;
2003}
2004
2005static void nfs_ooo_record(struct nfs_inode *nfsi,
2006 struct nfs_fattr *fattr)
2007{
2008 /* This reply was out-of-order, so record in the
2009 * pre/post change id, possibly cancelling
2010 * gaps created when iversion was jumpped forward.
2011 */
2012 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) &&
2013 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE))
2014 nfs_ooo_merge(nfsi,
2015 fattr->change_attr,
2016 fattr->pre_change_attr);
2017}
2018
6f9be83d
TM		 2019static int nfs_refresh_inode_locked(struct inode *inode,
2020 struct nfs_fattr *fattr)
a10ad176 2021{
6f9be83d
TM		 2022 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
2023 int ret = 0;
f4ce1299
TM		 2024
2025 trace_nfs_refresh_inode_enter(inode);
2026
7b24dacf 2027 if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode))
f4ce1299 2028 ret = nfs_update_inode(inode, fattr);
3db63daa
N		 2029 else {
2030 nfs_ooo_record(NFS_I(inode), fattr);
2031
2032 if (attr_cmp == 0)
2033 ret = nfs_check_inode_attributes(inode, fattr);
2034 }
f4ce1299
TM		 2035
2036 trace_nfs_refresh_inode_exit(inode, ret);
2037 return ret;
870a5be8
TM		 2038}
2039
33801147
TM		 2040/**
2041 * nfs_refresh_inode - try to update the inode attribute cache
302fad7b
TM		 2042 * @inode: pointer to inode
2043 * @fattr: updated attributes
33801147
TM		 2044 *
2045 * Check that an RPC call that returned attributes has not overlapped with
2046 * other recent updates of the inode metadata, then decide whether it is
2047 * safe to do a full update of the inode attributes, or whether just to
2048 * call nfs_check_inode_attributes.
2049 */
2050int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
2051{
33801147
TM		 2052 int status;
2053
2054 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
2055 return 0;
2056 spin_lock(&inode->i_lock);
870a5be8 2057 status = nfs_refresh_inode_locked(inode, fattr);
33801147 2058 spin_unlock(&inode->i_lock);
ef79c097 2059
33801147
TM		 2060 return status;
2061}
ddda8e0a 2062EXPORT_SYMBOL_GPL(nfs_refresh_inode);
33801147 2063
16e14375
TM		 2064static int nfs_post_op_update_inode_locked(struct inode *inode,
2065 struct nfs_fattr *fattr, unsigned int invalid)
d65f557f 2066{
6edf9609
TM		 2067 if (S_ISDIR(inode->i_mode))
2068 invalid |= NFS_INO_INVALID_DATA;
2069 nfs_set_cache_invalid(inode, invalid);
d65f557f
TM		 2070 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
2071 return 0;
2072 return nfs_refresh_inode_locked(inode, fattr);
2073}
2074
decf491f
TM		 2075/**
2076 * nfs_post_op_update_inode - try to update the inode attribute cache
302fad7b
TM		 2077 * @inode: pointer to inode
2078 * @fattr: updated attributes
decf491f
TM		 2079 *
2080 * After an operation that has changed the inode metadata, mark the
2081 * attribute cache as being invalid, then try to update it.
f551e44f
CL		 2082 *
2083 * NB: if the server didn't return any post op attributes, this
2084 * function will force the retrieval of attributes before the next
2085 * NFS request. Thus it should be used only for operations that
2086 * are expected to change one or more attributes, to avoid
2087 * unnecessary NFS requests and trips through nfs_update_inode().
decf491f
TM		 2088 */
2089int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
2090{
d65f557f 2091 int status;
decf491f 2092
7668fdbe 2093 spin_lock(&inode->i_lock);
92d64e47 2094 nfs_fattr_set_barrier(fattr);
16e14375
TM		 2095 status = nfs_post_op_update_inode_locked(inode, fattr,
2096 NFS_INO_INVALID_CHANGE
d554168f
TM		 2097 | NFS_INO_INVALID_CTIME
2098 | NFS_INO_REVAL_FORCED);
7668fdbe 2099 spin_unlock(&inode->i_lock);
aa9c2669 2100
870a5be8 2101 return status;
decf491f 2102}
1c606fb7 2103EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
decf491f 2104
70ca8852 2105/**
a08a8cd3 2106 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
302fad7b
TM		 2107 * @inode: pointer to inode
2108 * @fattr: updated attributes
70ca8852
TM		 2109 *
2110 * After an operation that has changed the inode metadata, mark the
2111 * attribute cache as being invalid, then try to update it. Fake up
2112 * weak cache consistency data, if none exist.
2113 *
2114 * This function is mainly designed to be used by the ->write_done() functions.
2115 */
a08a8cd3 2116int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
70ca8852 2117{
6f9be83d 2118 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
d65f557f
TM		 2119 int status;
2120
d65f557f 2121 /* Don't do a WCC update if these attributes are already stale */
6f9be83d
TM		 2122 if (attr_cmp < 0)
2123 return 0;
2124 if ((fattr->valid & NFS_ATTR_FATTR) == 0 || !attr_cmp) {
3db63daa
N		 2125 /* Record the pre/post change info before clearing PRECHANGE */
2126 nfs_ooo_record(NFS_I(inode), fattr);
9e6e70f8
TM		 2127 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
2128 | NFS_ATTR_FATTR_PRESIZE
2129 | NFS_ATTR_FATTR_PREMTIME
2130 | NFS_ATTR_FATTR_PRECTIME);
d65f557f
TM		 2131 goto out_noforce;
2132 }
9e6e70f8
TM		 2133 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
2134 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1eb5d98f 2135 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
9e6e70f8 2136 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
70ca8852 2137 }
9e6e70f8
TM		 2138 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
2139 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
55e04e9c 2140 fattr->pre_ctime = inode_get_ctime(inode);
9e6e70f8
TM		 2141 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
2142 }
2143 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
2144 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
41d581a9 2145 fattr->pre_mtime = inode_get_mtime(inode);
9e6e70f8
TM		 2146 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
2147 }
2148 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
2149 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
a3d01454 2150 fattr->pre_size = i_size_read(inode);
9e6e70f8 2151 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
70ca8852 2152 }
d65f557f 2153out_noforce:
16e14375
TM		 2154 status = nfs_post_op_update_inode_locked(inode, fattr,
2155 NFS_INO_INVALID_CHANGE
2156 | NFS_INO_INVALID_CTIME
3a39e778
ZB		 2157 | NFS_INO_INVALID_MTIME
2158 | NFS_INO_INVALID_BLOCKS);
a08a8cd3
TM		 2159 return status;
2160}
2161
2162/**
2163 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
302fad7b
TM		 2164 * @inode: pointer to inode
2165 * @fattr: updated attributes
a08a8cd3
TM		 2166 *
2167 * After an operation that has changed the inode metadata, mark the
2168 * attribute cache as being invalid, then try to update it. Fake up
2169 * weak cache consistency data, if none exist.
2170 *
2171 * This function is mainly designed to be used by the ->write_done() functions.
2172 */
2173int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
2174{
2175 int status;
2176
2177 spin_lock(&inode->i_lock);
8f8ba1d7 2178 nfs_fattr_set_barrier(fattr);
a08a8cd3 2179 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
d65f557f
TM		 2180 spin_unlock(&inode->i_lock);
2181 return status;
70ca8852 2182}
ddda8e0a 2183EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
70ca8852 2184
ea96d1ec 2185
1da177e4
LT		 2186/*
2187 * Many nfs protocol calls return the new file attributes after
2188 * an operation. Here we update the inode to reflect the state
2189 * of the server's inode.
2190 *
2191 * This is a bit tricky because we have to make sure all dirty pages
2192 * have been sent off to the server before calling invalidate_inode_pages.
2193 * To make sure no other process adds more write requests while we try
2194 * our best to flush them, we make them sleep during the attribute refresh.
2195 *
2196 * A very similar scenario holds for the dir cache.
2197 */
24aa1fe6 2198static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1da177e4 2199{
ce62b114 2200 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2201 struct nfs_inode *nfsi = NFS_I(inode);
951a143b 2202 loff_t cur_isize, new_isize;
ce62b114 2203 u64 fattr_supported = server->fattr_valid;
2a3f5fd4 2204 unsigned long invalid = 0;
3e7d950a 2205 unsigned long now = jiffies;
62ab460c 2206 unsigned long save_cache_validity;
651b0e70 2207 bool have_writers = nfs_file_has_buffered_writers(nfsi);
944171cb 2208 bool cache_revalidated = true;
0b467264 2209 bool attr_changed = false;
c80d17c5 2210 bool have_delegation;
1da177e4 2211
1e8968c5 2212 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
3110ff80 2213 __func__, inode->i_sb->s_id, inode->i_ino,
4f1abd22 2214 nfs_display_fhandle_hash(NFS_FH(inode)),
1da177e4
LT		 2215 atomic_read(&inode->i_count), fattr->valid);
2216
eb3d8f42
TM		 2217 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
2218 /* Only a mounted-on-fileid? Just exit */
2219 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
2220 return 0;
7e10cc25 2221 /* Has the inode gone and changed behind our back? */
eb3d8f42 2222 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 2223 /* Is this perhaps the mounted-on fileid? */
2224 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
2225 nfsi->fileid == fattr->mounted_on_fileid)
2226 return 0;
e73e6c9e
MT		 2227 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
2228 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
2229 NFS_SERVER(inode)->nfs_client->cl_hostname,
2230 inode->i_sb->s_id, (long long)nfsi->fileid,
2231 (long long)fattr->fileid);
2232 goto out_err;
2233 }
1da177e4
LT		 2234
2235 /*
2236 * Make sure the inode's type hasn't changed.
2237 */
6e3e2c43 2238 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) {
e73e6c9e
MT		 2239 /*
2240 * Big trouble! The inode has become a different object.
2241 */
1e8968c5 2242 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
e73e6c9e
MT		 2243 __func__, inode->i_ino, inode->i_mode, fattr->mode);
2244 goto out_err;
2245 }
1da177e4 2246
a0356862 2247 /* Update the fsid? */
9e6e70f8 2248 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
c37dcd33 2249 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
36d43a43 2250 !IS_AUTOMOUNT(inode))
8b4bdcf8
TM		 2251 server->fsid = fattr->fsid;
2252
c80d17c5
TM		 2253 /* Save the delegation state before clearing cache_validity */
2254 have_delegation = nfs_have_delegated_attributes(inode);
2255
1da177e4
LT		 2256 /*
2257 * Update the read time so we don't revalidate too often.
2258 */
33801147 2259 nfsi->read_cache_jiffies = fattr->time_start;
3e7d950a 2260
0a741f59
TM		 2261 /* Fix up any delegated attributes in the struct nfs_fattr */
2262 nfs_fattr_fixup_delegated(inode, fattr);
2263
62ab460c
TM		 2264 save_cache_validity = nfsi->cache_validity;
2265 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
2266 | NFS_INO_INVALID_ATIME
2267 | NFS_INO_REVAL_FORCED
3a39e778 2268 | NFS_INO_INVALID_BLOCKS);
1da177e4 2269
a895b4a1 2270 /* Do atomic weak cache consistency updates */
783b194c 2271 nfs_wcc_update_inode(inode, fattr);
a895b4a1 2272
944171cb 2273 if (pnfs_layoutcommit_outstanding(inode)) {
709fa576
TM		 2274 nfsi->cache_validity |=
2275 save_cache_validity &
2276 (NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |
2277 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
cc7f2dae 2278 NFS_INO_INVALID_BLOCKS);
944171cb
BC		 2279 cache_revalidated = false;
2280 }
10b7e9ad 2281
47aabaa7 2282 /* More cache consistency checks */
9e6e70f8 2283 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
3db63daa
N		 2284 if (!have_writers && nfsi->ooo && nfsi->ooo->cnt == 1 &&
2285 nfsi->ooo->gap[0].end == inode_peek_iversion_raw(inode)) {
2286 /* There is one remaining gap that hasn't been
2287 * merged into iversion - do that now.
2288 */
2289 inode_set_iversion_raw(inode, nfsi->ooo->gap[0].start);
2290 kfree(nfsi->ooo);
2291 nfsi->ooo = NULL;
2292 }
c472c07b 2293 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
38512aa9 2294 /* Could it be a race with writeback? */
c80d17c5 2295 if (!(have_writers || have_delegation)) {
0b467264 2296 invalid |= NFS_INO_INVALID_DATA
38512aa9 2297 | NFS_INO_INVALID_ACCESS
95ad37f9
FL		 2298 | NFS_INO_INVALID_ACL
2299 | NFS_INO_INVALID_XATTR;
cac88f94 2300 /* Force revalidate of all attributes */
16e14375
TM		 2301 save_cache_validity |= NFS_INO_INVALID_CTIME
2302 | NFS_INO_INVALID_MTIME
2303 | NFS_INO_INVALID_SIZE
4cdfeb64 2304 | NFS_INO_INVALID_BLOCKS
fabf2b34 2305 | NFS_INO_INVALID_NLINK
720869eb 2306 | NFS_INO_INVALID_MODE
16e14375 2307 | NFS_INO_INVALID_OTHER;
38512aa9
TM		 2308 if (S_ISDIR(inode->i_mode))
2309 nfs_force_lookup_revalidate(inode);
a9601ac5 2310 attr_changed = true;
c80d17c5
TM		 2311 dprintk("NFS: change_attr change on server for file %s/%ld\n",
2312 inode->i_sb->s_id,
2313 inode->i_ino);
3db63daa
N		 2314 } else if (!have_delegation) {
2315 nfs_ooo_record(nfsi, fattr);
2316 nfs_ooo_merge(nfsi, inode_peek_iversion_raw(inode),
2317 fattr->change_attr);
2318 }
1eb5d98f 2319 inode_set_iversion_raw(inode, fattr->change_attr);
9e6e70f8 2320 }
ade14a7d 2321 } else {
cc7f2dae
TM		 2322 nfsi->cache_validity |=
2323 save_cache_validity & NFS_INO_INVALID_CHANGE;
213bb584
TM		 2324 if (!have_delegation ||
2325 (nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0)
2326 cache_revalidated = false;
ade14a7d 2327 }
9e6e70f8 2328
213bb584 2329 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
41d581a9 2330 inode_set_mtime_to_ts(inode, fattr->mtime);
213bb584 2331 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
cc7f2dae
TM		 2332 nfsi->cache_validity |=
2333 save_cache_validity & NFS_INO_INVALID_MTIME;
62ab460c 2334
213bb584 2335 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 2336 inode_set_ctime_to_ts(inode, fattr->ctime);
213bb584 2337 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
cc7f2dae
TM		 2338 nfsi->cache_validity |=
2339 save_cache_validity & NFS_INO_INVALID_CTIME;
47aabaa7 2340
951a143b 2341 /* Check if our cached file size is stale */
9e6e70f8
TM		 2342 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
2343 new_isize = nfs_size_to_loff_t(fattr->size);
2344 cur_isize = i_size_read(inode);
c80d17c5 2345 if (new_isize != cur_isize && !have_delegation) {
9e6e70f8
TM		 2346 /* Do we perhaps have any outstanding writes, or has
2347 * the file grown beyond our last write? */
a6b6d5b8 2348 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
110cb2d2 2349 trace_nfs_size_update(inode, new_isize);
9e6e70f8 2350 i_size_write(inode, new_isize);
ca0daa27 2351 if (!have_writers)
16e14375 2352 invalid |= NFS_INO_INVALID_DATA;
9e6e70f8 2353 }
1da177e4 2354 }
4cdfeb64
TM		 2355 if (new_isize == 0 &&
2356 !(fattr->valid & (NFS_ATTR_FATTR_SPACE_USED |
2357 NFS_ATTR_FATTR_BLOCKS_USED))) {
2358 fattr->du.nfs3.used = 0;
2359 fattr->valid |= NFS_ATTR_FATTR_SPACE_USED;
2360 }
213bb584 2361 } else
cc7f2dae
TM		 2362 nfsi->cache_validity |=
2363 save_cache_validity & NFS_INO_INVALID_SIZE;
1da177e4 2364
9e6e70f8 2365 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
41d581a9 2366 inode_set_atime_to_ts(inode, fattr->atime);
213bb584 2367 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
cc7f2dae
TM		 2368 nfsi->cache_validity |=
2369 save_cache_validity & NFS_INO_INVALID_ATIME;
1da177e4 2370
9e6e70f8
TM		 2371 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
2372 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
9b4b3513
TM		 2373 umode_t newmode = inode->i_mode & S_IFMT;
2374 newmode |= fattr->mode & S_IALLUGO;
2375 inode->i_mode = newmode;
16e14375 2376 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2377 | NFS_INO_INVALID_ACL;
9e6e70f8 2378 }
213bb584 2379 } else if (fattr_supported & NFS_ATTR_FATTR_MODE)
cc7f2dae
TM		 2380 nfsi->cache_validity |=
2381 save_cache_validity & NFS_INO_INVALID_MODE;
62ab460c 2382
9e6e70f8 2383 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
9ff593c4 2384 if (!uid_eq(inode->i_uid, fattr->uid)) {
16e14375 2385 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2386 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2387 inode->i_uid = fattr->uid;
2388 }
213bb584 2389 } else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
cc7f2dae
TM		 2390 nfsi->cache_validity |=
2391 save_cache_validity & NFS_INO_INVALID_OTHER;
62ab460c 2392
9e6e70f8 2393 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
9ff593c4 2394 if (!gid_eq(inode->i_gid, fattr->gid)) {
16e14375 2395 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2396 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2397 inode->i_gid = fattr->gid;
2398 }
213bb584 2399 } else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
cc7f2dae
TM		 2400 nfsi->cache_validity |=
2401 save_cache_validity & NFS_INO_INVALID_OTHER;
921615f1 2402
9e6e70f8 2403 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
36a10a3c 2404 if (inode->i_nlink != fattr->nlink)
bfe86848 2405 set_nlink(inode, fattr->nlink);
213bb584 2406 } else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
cc7f2dae
TM		 2407 nfsi->cache_validity |=
2408 save_cache_validity & NFS_INO_INVALID_NLINK;
1da177e4 2409
9e6e70f8 2410 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 2411 /*
2412 * report the blocks in 512byte units
2413 */
2414 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
213bb584 2415 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED)
ce62b114
TM		 2416 nfsi->cache_validity |=
2417 save_cache_validity & NFS_INO_INVALID_BLOCKS;
ce62b114 2418
213bb584 2419 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
9e6e70f8 2420 inode->i_blocks = fattr->du.nfs2.blocks;
213bb584 2421 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED)
cc7f2dae
TM		 2422 nfsi->cache_validity |=
2423 save_cache_validity & NFS_INO_INVALID_BLOCKS;
1da177e4
LT		 2424
2425 /* Update attrtimeo value if we're out of the unstable period */
0b467264 2426 if (attr_changed) {
91d5b470 2427 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1da177e4 2428 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
3e7d950a 2429 nfsi->attrtimeo_timestamp = now;
f5062003 2430 /* Set barrier to be more recent than all outstanding updates */
4704f0e2 2431 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
6d2b2966 2432 } else {
ade14a7d
TM		 2433 if (cache_revalidated) {
2434 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2435 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2436 nfsi->attrtimeo <<= 1;
2437 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2438 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2439 }
6d2b2966
TM		 2440 nfsi->attrtimeo_timestamp = now;
2441 }
f5062003 2442 /* Set the barrier to be more recent than this fattr */
9fdbfad1 2443 if ((long)(fattr->gencount - nfsi->attr_gencount) > 0)
f5062003 2444 nfsi->attr_gencount = fattr->gencount;
1da177e4 2445 }
c812012f 2446
1da177e4
LT		 2447 /* Don't invalidate the data if we were to blame */
2448 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2449 || S_ISLNK(inode->i_mode)))
2450 invalid &= ~NFS_INO_INVALID_DATA;
c80d17c5 2451 nfs_set_cache_invalid(inode, invalid);
de242c0b 2452
1da177e4 2453 return 0;
b37b03b7 2454 out_err:
1da177e4
LT		 2455 /*
2456 * No need to worry about unhashing the dentry, as the
2457 * lookup validation will know that the inode is bad.
2458 * (But we fall through to invalidate the caches.)
2459 */
93ce4af7 2460 nfs_set_inode_stale_locked(inode);
1da177e4
LT		 2461 return -ESTALE;
2462}
2463
f7b422b1 2464struct inode *nfs_alloc_inode(struct super_block *sb)
1da177e4
LT		 2465{
2466 struct nfs_inode *nfsi;
fd60b288 2467 nfsi = alloc_inode_sb(sb, nfs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 2468 if (!nfsi)
2469 return NULL;
55296809
CL		 2470 nfsi->flags = 0UL;
2471 nfsi->cache_validity = 0UL;
3db63daa 2472 nfsi->ooo = NULL;
89d77c8f 2473#if IS_ENABLED(CONFIG_NFS_V4)
e50a1c2e
BF		 2474 nfsi->nfs4_acl = NULL;
2475#endif /* CONFIG_NFS_V4 */
95ad37f9
FL		 2476#ifdef CONFIG_NFS_V4_2
2477 nfsi->xattr_cache = NULL;
2478#endif
000dbe0b
DW		 2479 nfs_netfs_inode_init(nfsi);
2480
1da177e4
LT		 2481 return &nfsi->vfs_inode;
2482}
89d77c8f 2483EXPORT_SYMBOL_GPL(nfs_alloc_inode);
1da177e4 2484
ca1a199e 2485void nfs_free_inode(struct inode *inode)
1da177e4 2486{
3db63daa 2487 kfree(NFS_I(inode)->ooo);
1da177e4
LT		 2488 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2489}
ca1a199e 2490EXPORT_SYMBOL_GPL(nfs_free_inode);
fa0d7e3d 2491
d75d5414
AM		 2492static inline void nfs4_init_once(struct nfs_inode *nfsi)
2493{
89d77c8f 2494#if IS_ENABLED(CONFIG_NFS_V4)
d75d5414
AM		 2495 INIT_LIST_HEAD(&nfsi->open_states);
2496 nfsi->delegation = NULL;
d75d5414 2497 init_rwsem(&nfsi->rwsem);
e5e94017 2498 nfsi->layout = NULL;
d75d5414
AM		 2499#endif
2500}
f7b422b1 2501
51cc5068 2502static void init_once(void *foo)
1da177e4 2503{
7e7ce2cc 2504 struct nfs_inode *nfsi = foo;
1da177e4 2505
a35afb83 2506 inode_init_once(&nfsi->vfs_inode);
a35afb83
CL		 2507 INIT_LIST_HEAD(&nfsi->open_files);
2508 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2509 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
a35afb83 2510 nfs4_init_once(nfsi);
1da177e4 2511}
20c2df83 2512
f7b422b1 2513static int __init nfs_init_inodecache(void)
1da177e4
LT		 2514{
2515 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2516 sizeof(struct nfs_inode),
fffb60f9 2517 0, (SLAB_RECLAIM_ACCOUNT|
f88c3fb8 2518 SLAB_ACCOUNT),
20c2df83 2519 init_once);
1da177e4
LT		 2520 if (nfs_inode_cachep == NULL)
2521 return -ENOMEM;
2522
2523 return 0;
2524}
2525
266bee88 2526static void nfs_destroy_inodecache(void)
1da177e4 2527{
8c0a8537
KS		 2528 /*
2529 * Make sure all delayed rcu free inodes are flushed before we
2530 * destroy cache.
2531 */
2532 rcu_barrier();
1a1d92c1 2533 kmem_cache_destroy(nfs_inode_cachep);
1da177e4
LT		 2534}
2535
b9f5dd57 2536struct workqueue_struct *nfslocaliod_workqueue;
5746006f 2537struct workqueue_struct *nfsiod_workqueue;
89d77c8f 2538EXPORT_SYMBOL_GPL(nfsiod_workqueue);
5746006f
TM		 2539
2540/*
b9f5dd57 2541 * Destroy the nfsiod workqueues
5746006f 2542 */
b9f5dd57 2543static void nfsiod_stop(void)
5746006f
TM		 2544{
2545 struct workqueue_struct *wq;
b9f5dd57
TM		 2546
2547 wq = nfsiod_workqueue;
2548 if (wq != NULL) {
2549 nfsiod_workqueue = NULL;
2550 destroy_workqueue(wq);
2551 }
2552#if IS_ENABLED(CONFIG_NFS_LOCALIO)
2553 wq = nfslocaliod_workqueue;
2554 if (wq != NULL) {
2555 nfslocaliod_workqueue = NULL;
2556 destroy_workqueue(wq);
2557 }
2558#endif /* CONFIG_NFS_LOCALIO */
5746006f
TM		 2559}
2560
2561/*
b9f5dd57 2562 * Start the nfsiod workqueues
5746006f 2563 */
b9f5dd57 2564static int nfsiod_start(void)
5746006f 2565{
b9f5dd57
TM		 2566 dprintk("RPC: creating workqueue nfsiod\n");
2567 nfsiod_workqueue = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
2568 if (nfsiod_workqueue == NULL)
2569 return -ENOMEM;
2570#if IS_ENABLED(CONFIG_NFS_LOCALIO)
2571 /*
2572 * localio writes need to use a normal (non-memreclaim) workqueue.
2573 * When we start getting low on space, XFS goes and calls flush_work() on
2574 * a non-memreclaim work queue, which causes a priority inversion problem.
2575 */
2576 dprintk("RPC: creating workqueue nfslocaliod\n");
2577 nfslocaliod_workqueue = alloc_workqueue("nfslocaliod", WQ_UNBOUND, 0);
2578 if (unlikely(nfslocaliod_workqueue == NULL)) {
2579 nfsiod_stop();
2580 return -ENOMEM;
2581 }
2582#endif /* CONFIG_NFS_LOCALIO */
2583 return 0;
5746006f
TM		 2584}
2585
c7d03a00 2586unsigned int nfs_net_id;
9e2e74db 2587EXPORT_SYMBOL_GPL(nfs_net_id);
1b340d01
SK		 2588
2589static int nfs_net_init(struct net *net)
2590{
1548036e 2591 struct nfs_net *nn = net_generic(net, nfs_net_id);
e8d6f3ab 2592 int err;
1548036e 2593
6b13168b 2594 nfs_clients_init(net);
24457f1b
KI		 2595
2596 if (!rpc_proc_register(net, &nn->rpcstats)) {
e8d6f3ab
KI		 2597 err = -ENOMEM;
2598 goto err_proc_rpc;
24457f1b
KI		 2599 }
2600
e8d6f3ab
KI		 2601 err = nfs_fs_proc_net_init(net);
2602 if (err)
2603 goto err_proc_nfs;
2604
2605 return 0;
2606
2607err_proc_nfs:
2608 rpc_proc_unregister(net, "nfs");
2609err_proc_rpc:
2610 nfs_clients_exit(net);
2611 return err;
1b340d01
SK		 2612}
2613
2614static void nfs_net_exit(struct net *net)
2615{
d47151b7 2616 rpc_proc_unregister(net, "nfs");
65b38851 2617 nfs_fs_proc_net_exit(net);
10b7a70c 2618 nfs_clients_exit(net);
1b340d01
SK		 2619}
2620
2621static struct pernet_operations nfs_net_ops = {
2622 .init = nfs_net_init,
2623 .exit = nfs_net_exit,
2624 .id = &nfs_net_id,
2625 .size = sizeof(struct nfs_net),
2626};
2627
1da177e4
LT		 2628/*
2629 * Initialize NFS
2630 */
2631static int __init init_nfs_fs(void)
2632{
2633 int err;
2634
996bc4f4
TM		 2635 err = nfs_sysfs_init();
2636 if (err < 0)
2637 goto out10;
2638
1b340d01 2639 err = register_pernet_subsys(&nfs_net_ops);
e571cbf1 2640 if (err < 0)
89d77c8f 2641 goto out9;
e571cbf1 2642
5746006f
TM		 2643 err = nfsiod_start();
2644 if (err)
89d77c8f 2645 goto out7;
5746006f 2646
6aaca566
DH		 2647 err = nfs_fs_proc_init();
2648 if (err)
89d77c8f 2649 goto out6;
6aaca566 2650
1da177e4
LT		 2651 err = nfs_init_nfspagecache();
2652 if (err)
89d77c8f 2653 goto out5;
1da177e4
LT		 2654
2655 err = nfs_init_inodecache();
2656 if (err)
89d77c8f 2657 goto out4;
1da177e4
LT		 2658
2659 err = nfs_init_readpagecache();
2660 if (err)
89d77c8f 2661 goto out3;
1da177e4
LT		 2662
2663 err = nfs_init_writepagecache();
2664 if (err)
89d77c8f 2665 goto out2;
1da177e4 2666
1da177e4
LT		 2667 err = nfs_init_directcache();
2668 if (err)
89d77c8f 2669 goto out1;
1da177e4 2670
cd738ee9
KM		 2671 err = register_nfs_fs();
2672 if (err)
129d1977
BS		 2673 goto out0;
2674
1da177e4 2675 return 0;
129d1977 2676out0:
1da177e4 2677 nfs_destroy_directcache();
89d77c8f 2678out1:
129d1977 2679 nfs_destroy_writepagecache();
89d77c8f 2680out2:
129d1977 2681 nfs_destroy_readpagecache();
89d77c8f 2682out3:
129d1977 2683 nfs_destroy_inodecache();
89d77c8f 2684out4:
129d1977 2685 nfs_destroy_nfspagecache();
89d77c8f 2686out5:
129d1977 2687 nfs_fs_proc_exit();
89d77c8f 2688out6:
129d1977 2689 nfsiod_stop();
89d77c8f 2690out7:
129d1977 2691 unregister_pernet_subsys(&nfs_net_ops);
89d77c8f 2692out9:
996bc4f4
TM		 2693 nfs_sysfs_exit();
2694out10:
1da177e4
LT		 2695 return err;
2696}
2697
2698static void __exit exit_nfs_fs(void)
2699{
1da177e4 2700 nfs_destroy_directcache();
1da177e4
LT		 2701 nfs_destroy_writepagecache();
2702 nfs_destroy_readpagecache();
2703 nfs_destroy_inodecache();
2704 nfs_destroy_nfspagecache();
1b340d01 2705 unregister_pernet_subsys(&nfs_net_ops);
f7b422b1 2706 unregister_nfs_fs();
6aaca566 2707 nfs_fs_proc_exit();
5746006f 2708 nfsiod_stop();
996bc4f4 2709 nfs_sysfs_exit();
1da177e4
LT		 2710}
2711
2712/* Not quite true; I just maintain it */
2713MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
d3318990 2714MODULE_DESCRIPTION("NFS client support");
1da177e4 2715MODULE_LICENSE("GPL");
f43bf0be 2716module_param(enable_ino64, bool, 0644);
1da177e4
LT		 2717
2718module_init(init_nfs_fs)
2719module_exit(exit_nfs_fs)
Linux 6.x block layer and io_uring tree(s)