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NFSv4: Fix potential Oops in decode_op_map()
[linux-2.6-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
210c7c17 75static int nfs_wait_killable(int mode)
72cb77f4 76{
416ad3c9 77 freezable_schedule_unsafe();
dfd01f02
PZ		 78 if (signal_pending_state(mode, current))
79 return -ERESTARTSYS;
72cb77f4
TM		 80 return 0;
81}
210c7c17
BC		 82
83int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
84{
85 return nfs_wait_killable(mode);
86}
89d77c8f 87EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
72cb77f4 88
f43bf0be
TM		 89/**
90 * nfs_compat_user_ino64 - returns the user-visible inode number
91 * @fileid: 64-bit fileid
92 *
93 * This function returns a 32-bit inode number if the boot parameter
94 * nfs.enable_ino64 is zero.
95 */
96u64 nfs_compat_user_ino64(u64 fileid)
97{
3fa0b4e2
FF		 98#ifdef CONFIG_COMPAT
99 compat_ulong_t ino;
100#else
101 unsigned long ino;
102#endif
f43bf0be
TM		 103
104 if (enable_ino64)
105 return fileid;
106 ino = fileid;
107 if (sizeof(ino) < sizeof(fileid))
108 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
109 return ino;
110}
111
eed99357
TM		 112int nfs_drop_inode(struct inode *inode)
113{
114 return NFS_STALE(inode) || generic_drop_inode(inode);
115}
116EXPORT_SYMBOL_GPL(nfs_drop_inode);
117
19d87ca3 118void nfs_clear_inode(struct inode *inode)
1da177e4 119{
da6d503a
TM		 120 /*
121 * The following should never happen...
122 */
f48407dd
TM		 123 WARN_ON_ONCE(nfs_have_writebacks(inode));
124 WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
ada70d94 125 nfs_zap_acl_cache(inode);
1c3c07e9 126 nfs_access_zap_cache(inode);
f1fe29b4 127 nfs_fscache_clear_inode(inode);
1da177e4 128}
89d77c8f 129EXPORT_SYMBOL_GPL(nfs_clear_inode);
1da177e4 130
b57922d9
AV		 131void nfs_evict_inode(struct inode *inode)
132{
91b0abe3 133 truncate_inode_pages_final(&inode->i_data);
dbd5768f 134 clear_inode(inode);
b57922d9
AV		 135 nfs_clear_inode(inode);
136}
137
9e1681c2 138int nfs_sync_inode(struct inode *inode)
4d346bea 139{
95d9f6c3 140 inode_dio_wait(inode);
4d346bea
TM		 141 return nfs_wb_all(inode);
142}
9e1681c2 143EXPORT_SYMBOL_GPL(nfs_sync_inode);
4d346bea 144
29884df0
TM		 145/**
146 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
302fad7b 147 * @mapping: pointer to struct address_space
29884df0
TM		 148 */
149int nfs_sync_mapping(struct address_space *mapping)
150{
5cf95214 151 int ret = 0;
29884df0 152
5cf95214
TM		 153 if (mapping->nrpages != 0) {
154 unmap_mapping_range(mapping, 0, 0, 0);
155 ret = nfs_wb_all(mapping->host);
156 }
29884df0
TM		 157 return ret;
158}
159
187e593d
TM		 160static int nfs_attribute_timeout(struct inode *inode)
161{
162 struct nfs_inode *nfsi = NFS_I(inode);
163
164 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
165}
166
13c0b082
TM		 167static bool nfs_check_cache_flags_invalid(struct inode *inode,
168 unsigned long flags)
61540bf6
TM		 169{
170 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
171
61540bf6
TM		 172 return (cache_validity & flags) != 0;
173}
174
61540bf6
TM		 175bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
176{
13c0b082
TM		 177 if (nfs_check_cache_flags_invalid(inode, flags))
178 return true;
179 return nfs_attribute_cache_expired(inode);
61540bf6 180}
95ad37f9 181EXPORT_SYMBOL_GPL(nfs_check_cache_invalid);
61540bf6 182
848fdd62
TM		 183#ifdef CONFIG_NFS_V4_2
184static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
185{
186 return nfsi->xattr_cache != NULL;
187}
188#else
189static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
190{
191 return false;
192}
193#endif
194
fd6d3fee 195void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
6edf9609
TM		 196{
197 struct nfs_inode *nfsi = NFS_I(inode);
3f0b3cf4
TM		 198 bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
199
200 if (have_delegation) {
201 if (!(flags & NFS_INO_REVAL_FORCED))
720869eb 202 flags &= ~(NFS_INO_INVALID_MODE |
cc7f2dae
TM		 203 NFS_INO_INVALID_OTHER |
204 NFS_INO_INVALID_XATTR);
205 flags &= ~(NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
50c7a799
TM		 206 } else if (flags & NFS_INO_REVAL_PAGECACHE)
207 flags |= NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE;
6edf9609 208
848fdd62
TM		 209 if (!nfs_has_xattr_cache(nfsi))
210 flags &= ~NFS_INO_INVALID_XATTR;
beab450d
TM		 211 if (flags & NFS_INO_INVALID_DATA)
212 nfs_fscache_invalidate(inode);
cc7f2dae 213 flags &= ~(NFS_INO_REVAL_PAGECACHE | NFS_INO_REVAL_FORCED);
488796ec 214
6edf9609 215 nfsi->cache_validity |= flags;
488796ec
TM		 216
217 if (inode->i_mapping->nrpages == 0)
218 nfsi->cache_validity &= ~(NFS_INO_INVALID_DATA |
219 NFS_INO_DATA_INVAL_DEFER);
220 else if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
221 nfsi->cache_validity &= ~NFS_INO_DATA_INVAL_DEFER;
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
de242c0b 238 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
6edf9609 239 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
aa9c2669
DQ		 240 | NFS_INO_INVALID_DATA
241 | NFS_INO_INVALID_ACCESS
242 | NFS_INO_INVALID_ACL
95ad37f9 243 | NFS_INO_INVALID_XATTR
6edf9609 244 | NFS_INO_REVAL_PAGECACHE);
aa9c2669 245 } else
6edf9609 246 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
aa9c2669
DQ		 247 | NFS_INO_INVALID_ACCESS
248 | NFS_INO_INVALID_ACL
95ad37f9 249 | NFS_INO_INVALID_XATTR
6edf9609 250 | NFS_INO_REVAL_PAGECACHE);
fd1defc2 251 nfs_zap_label_cache_locked(nfsi);
b37b03b7 252}
dc59250c 253
b37b03b7
TM		 254void nfs_zap_caches(struct inode *inode)
255{
256 spin_lock(&inode->i_lock);
257 nfs_zap_caches_locked(inode);
dc59250c 258 spin_unlock(&inode->i_lock);
ada70d94
TM		 259}
260
cd9ae2b6
TM		 261void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
262{
263 if (mapping->nrpages != 0) {
264 spin_lock(&inode->i_lock);
6edf9609 265 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
cd9ae2b6
TM		 266 spin_unlock(&inode->i_lock);
267 }
268}
269
f41f7418 270void nfs_zap_acl_cache(struct inode *inode)
ada70d94
TM		 271{
272 void (*clear_acl_cache)(struct inode *);
273
274 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
275 if (clear_acl_cache != NULL)
276 clear_acl_cache(inode);
dc59250c 277 spin_lock(&inode->i_lock);
55296809 278 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
dc59250c 279 spin_unlock(&inode->i_lock);
1da177e4 280}
1c606fb7 281EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
1da177e4 282
c4812998
TM		 283void nfs_invalidate_atime(struct inode *inode)
284{
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{
323 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
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{
341 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
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
aa9c2669
DQ		 358void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
359 struct nfs4_label *label)
360{
361 int error;
362
363 if (label == NULL)
364 return;
365
aa9c2669
DQ		 366 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
367 error = security_inode_notifysecctx(inode, label->label,
368 label->len);
369 if (error)
370 printk(KERN_ERR "%s() %s %d "
371 "security_inode_notifysecctx() %d\n",
372 __func__,
373 (char *)label->label,
374 label->len, error);
fd1defc2 375 nfs_clear_label_invalid(inode);
aa9c2669
DQ		 376 }
377}
378
e058f70b
SD		 379struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
380{
381 struct nfs4_label *label = NULL;
382 int minor_version = server->nfs_client->cl_minorversion;
383
384 if (minor_version < 2)
385 return label;
386
387 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
388 return label;
389
390 label = kzalloc(sizeof(struct nfs4_label), flags);
391 if (label == NULL)
392 return ERR_PTR(-ENOMEM);
393
394 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
395 if (label->label == NULL) {
396 kfree(label);
397 return ERR_PTR(-ENOMEM);
398 }
399 label->len = NFS4_MAXLABELLEN;
400
401 return label;
402}
403EXPORT_SYMBOL_GPL(nfs4_label_alloc);
aa9c2669 404#else
829e57d7 405void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
aa9c2669
DQ		 406 struct nfs4_label *label)
407{
408}
e058f70b 409#endif
aa9c2669 410EXPORT_SYMBOL_GPL(nfs_setsecurity);
e058f70b 411
f174ff7a
PT		 412/* Search for inode identified by fh, fileid and i_mode in inode cache. */
413struct inode *
414nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
415{
416 struct nfs_find_desc desc = {
417 .fh = fh,
418 .fattr = fattr,
419 };
420 struct inode *inode;
421 unsigned long hash;
422
423 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
424 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
425 return NULL;
426
427 hash = nfs_fattr_to_ino_t(fattr);
428 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
429
430 dprintk("%s: returning %p\n", __func__, inode);
431 return inode;
432}
433
e591b298
TM		 434static void nfs_inode_init_regular(struct nfs_inode *nfsi)
435{
436 atomic_long_set(&nfsi->nrequests, 0);
437 INIT_LIST_HEAD(&nfsi->commit_info.list);
438 atomic_long_set(&nfsi->commit_info.ncommit, 0);
439 atomic_set(&nfsi->commit_info.rpcs_out, 0);
440 mutex_init(&nfsi->commit_mutex);
441}
442
443static void nfs_inode_init_dir(struct nfs_inode *nfsi)
444{
445 nfsi->cache_change_attribute = 0;
446 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
447 init_rwsem(&nfsi->rmdir_sem);
448}
449
1da177e4
LT		 450/*
451 * This is our front-end to iget that looks up inodes by file handle
452 * instead of inode number.
453 */
454struct inode *
1775fd3e 455nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 456{
457 struct nfs_find_desc desc = {
458 .fh = fh,
459 .fattr = fattr
460 };
03f28e3a 461 struct inode *inode = ERR_PTR(-ENOENT);
ce62b114 462 u64 fattr_supported = NFS_SB(sb)->fattr_valid;
1da177e4
LT		 463 unsigned long hash;
464
7ebb9315
BS		 465 nfs_attr_check_mountpoint(sb, fattr);
466
2ef47eb1
AS		 467 if (nfs_attr_use_mounted_on_fileid(fattr))
468 fattr->fileid = fattr->mounted_on_fileid;
469 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
1da177e4 470 goto out_no_inode;
9e6e70f8 471 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
1da177e4 472 goto out_no_inode;
1da177e4
LT		 473
474 hash = nfs_fattr_to_ino_t(fattr);
475
03f28e3a
TM		 476 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
477 if (inode == NULL) {
478 inode = ERR_PTR(-ENOMEM);
1da177e4 479 goto out_no_inode;
03f28e3a 480 }
1da177e4
LT		 481
482 if (inode->i_state & I_NEW) {
483 struct nfs_inode *nfsi = NFS_I(inode);
b0c4fddc 484 unsigned long now = jiffies;
1da177e4
LT		 485
486 /* We set i_ino for the few things that still rely on it,
487 * such as stat(2) */
488 inode->i_ino = hash;
489
490 /* We can't support update_atime(), since the server will reset it */
491 inode->i_flags |= S_NOATIME|S_NOCMTIME;
492 inode->i_mode = fattr->mode;
821a868a 493 nfsi->cache_validity = 0;
62ab460c 494 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
ce62b114 495 && (fattr_supported & NFS_ATTR_FATTR_MODE))
720869eb 496 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
1da177e4
LT		 497 /* Why so? Because we want revalidate for devices/FIFOs, and
498 * that's precisely what we have in nfs_file_inode_operations.
499 */
8fa5c000 500 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
1da177e4 501 if (S_ISREG(inode->i_mode)) {
1788ea6e 502 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
1da177e4 503 inode->i_data.a_ops = &nfs_file_aops;
e591b298 504 nfs_inode_init_regular(nfsi);
1da177e4 505 } else if (S_ISDIR(inode->i_mode)) {
8fa5c000 506 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
1da177e4 507 inode->i_fop = &nfs_dir_operations;
11de3b11 508 inode->i_data.a_ops = &nfs_dir_aops;
e591b298 509 nfs_inode_init_dir(nfsi);
55a97593 510 /* Deal with crossing mountpoints */
7ebb9315
BS		 511 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
512 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
6b97fd3d
MN		 513 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
514 inode->i_op = &nfs_referral_inode_operations;
515 else
516 inode->i_op = &nfs_mountpoint_inode_operations;
55a97593 517 inode->i_fop = NULL;
36d43a43 518 inode->i_flags |= S_AUTOMOUNT;
55a97593 519 }
21fc61c7 520 } else if (S_ISLNK(inode->i_mode)) {
1da177e4 521 inode->i_op = &nfs_symlink_inode_operations;
21fc61c7
AV		 522 inode_nohighmem(inode);
523 } else
1da177e4
LT		 524 init_special_inode(inode, inode->i_mode, fattr->rdev);
525
9e6e70f8
TM		 526 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
527 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
528 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
1eb5d98f 529 inode_set_iversion_raw(inode, 0);
9e6e70f8 530 inode->i_size = 0;
6d6b77f1 531 clear_nlink(inode);
9ff593c4
EB		 532 inode->i_uid = make_kuid(&init_user_ns, -2);
533 inode->i_gid = make_kgid(&init_user_ns, -2);
9e6e70f8 534 inode->i_blocks = 0;
2701d086
AA		 535 nfsi->write_io = 0;
536 nfsi->read_io = 0;
9e6e70f8 537
33801147 538 nfsi->read_cache_jiffies = fattr->time_start;
4704f0e2 539 nfsi->attr_gencount = fattr->gencount;
9e6e70f8 540 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 541 inode->i_atime = fattr->atime;
ce62b114 542 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
16e14375 543 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
9e6e70f8 544 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 545 inode->i_mtime = fattr->mtime;
ce62b114 546 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
16e14375 547 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
9e6e70f8 548 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 549 inode->i_ctime = fattr->ctime;
ce62b114 550 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
16e14375 551 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
9e6e70f8 552 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1eb5d98f 553 inode_set_iversion_raw(inode, fattr->change_attr);
cd812599 554 else
16e14375 555 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
9e6e70f8
TM		 556 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
557 inode->i_size = nfs_size_to_loff_t(fattr->size);
62ab460c 558 else
16e14375 559 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
9e6e70f8 560 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
bfe86848 561 set_nlink(inode, fattr->nlink);
ce62b114 562 else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
fabf2b34 563 nfs_set_cache_invalid(inode, NFS_INO_INVALID_NLINK);
9e6e70f8
TM		 564 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
565 inode->i_uid = fattr->uid;
ce62b114 566 else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
16e14375 567 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
9e6e70f8
TM		 568 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
569 inode->i_gid = fattr->gid;
ce62b114 570 else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
16e14375 571 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
0f44da51
FL		 572 if (nfs_server_capable(inode, NFS_CAP_XATTR))
573 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
9e6e70f8
TM		 574 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
575 inode->i_blocks = fattr->du.nfs2.blocks;
ce62b114
TM		 576 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED &&
577 fattr->size != 0)
578 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
9e6e70f8 579 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 580 /*
581 * report the blocks in 512byte units
582 */
583 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
ce62b114
TM		 584 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED &&
585 fattr->size != 0)
4cdfeb64 586 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
821a868a 587
aa9c2669
DQ		 588 nfs_setsecurity(inode, fattr, label);
589
1da177e4 590 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
b0c4fddc 591 nfsi->attrtimeo_timestamp = now;
1c3c07e9 592 nfsi->access_cache = RB_ROOT;
1da177e4 593
f1fe29b4 594 nfs_fscache_init_inode(inode);
ef79c097 595
1da177e4 596 unlock_new_inode(inode);
26fde4df
N		 597 } else {
598 int err = nfs_refresh_inode(inode, fattr);
599 if (err < 0) {
600 iput(inode);
601 inode = ERR_PTR(err);
602 goto out_no_inode;
603 }
604 }
1e8968c5 605 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
1da177e4 606 inode->i_sb->s_id,
1e8968c5 607 (unsigned long long)NFS_FILEID(inode),
4f1abd22 608 nfs_display_fhandle_hash(fh),
1da177e4
LT		 609 atomic_read(&inode->i_count));
610
611out:
612 return inode;
613
614out_no_inode:
03f28e3a 615 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
1da177e4
LT		 616 goto out;
617}
89d77c8f 618EXPORT_SYMBOL_GPL(nfs_fhget);
1da177e4 619
536e43d1 620#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		 621
622int
549c7297
CB		 623nfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
624 struct iattr *attr)
1da177e4 625{
2b0143b5 626 struct inode *inode = d_inode(dentry);
987f8dfc 627 struct nfs_fattr *fattr;
ae57ca0f 628 int error = 0;
1da177e4 629
91d5b470
CL		 630 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
631
188b95dd
JL		 632 /* skip mode change if it's just for clearing setuid/setgid */
633 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
634 attr->ia_valid &= ~ATTR_MODE;
635
1da177e4 636 if (attr->ia_valid & ATTR_SIZE) {
08a899d5
CH		 637 BUG_ON(!S_ISREG(inode->i_mode));
638
ae57ca0f
KM		 639 error = inode_newsize_ok(inode, attr->ia_size);
640 if (error)
641 return error;
642
643 if (attr->ia_size == i_size_read(inode))
1da177e4
LT		 644 attr->ia_valid &= ~ATTR_SIZE;
645 }
646
647 /* Optimization: if the end result is no change, don't RPC */
1f9f4328 648 if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0)
1da177e4
LT		 649 return 0;
650
f4ce1299
TM		 651 trace_nfs_setattr_enter(inode);
652
755c1e20 653 /* Write all dirty data */
4d346bea
TM		 654 if (S_ISREG(inode->i_mode))
655 nfs_sync_inode(inode);
987f8dfc
TM		 656
657 fattr = nfs_alloc_fattr();
ae57ca0f
KM		 658 if (fattr == NULL) {
659 error = -ENOMEM;
987f8dfc 660 goto out;
ae57ca0f
KM		 661 }
662
987f8dfc 663 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
65e4308d 664 if (error == 0)
aa9c2669 665 error = nfs_refresh_inode(inode, fattr);
987f8dfc
TM		 666 nfs_free_fattr(fattr);
667out:
f4ce1299 668 trace_nfs_setattr_exit(inode, error);
65e4308d
TM		 669 return error;
670}
ddda8e0a 671EXPORT_SYMBOL_GPL(nfs_setattr);
65e4308d 672
a3d01454
TM		 673/**
674 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
675 * @inode: inode of the file used
676 * @offset: file offset to start truncating
677 *
678 * This is a copy of the common vmtruncate, but with the locking
679 * corrected to take into account the fact that NFS requires
680 * inode->i_size to be updated under the inode->i_lock.
f044636d 681 * Note: must be called with inode->i_lock held!
a3d01454
TM		 682 */
683static int nfs_vmtruncate(struct inode * inode, loff_t offset)
684{
c08d3b0e 685 int err;
a3d01454 686
c08d3b0e 687 err = inode_newsize_ok(inode, offset);
688 if (err)
689 goto out;
a3d01454 690
110cb2d2 691 trace_nfs_size_truncate(inode, offset);
c08d3b0e 692 i_size_write(inode, offset);
6edf9609
TM		 693 /* Optimisation */
694 if (offset == 0)
1c341b77
TM		 695 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA |
696 NFS_INO_DATA_INVAL_DEFER);
f6cdfa6d 697 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
c08d3b0e 698
f044636d 699 spin_unlock(&inode->i_lock);
7caef267 700 truncate_pagecache(inode, offset);
f044636d 701 spin_lock(&inode->i_lock);
c08d3b0e 702out:
703 return err;
a3d01454
TM		 704}
705
65e4308d
TM		 706/**
707 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
708 * @inode: pointer to struct inode
709 * @attr: pointer to struct iattr
16e14375 710 * @fattr: pointer to struct nfs_fattr
65e4308d
TM		 711 *
712 * Note: we do this in the *proc.c in order to ensure that
713 * it works for things like exclusive creates too.
714 */
f044636d
TM		 715void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
716 struct nfs_fattr *fattr)
65e4308d 717{
f044636d
TM		 718 /* Barrier: bump the attribute generation count. */
719 nfs_fattr_set_barrier(fattr);
720
721 spin_lock(&inode->i_lock);
722 NFS_I(inode)->attr_gencount = fattr->gencount;
6a97d02d 723 if ((attr->ia_valid & ATTR_SIZE) != 0) {
4cdfeb64
TM		 724 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME |
725 NFS_INO_INVALID_BLOCKS);
6a97d02d
TM		 726 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
727 nfs_vmtruncate(inode, attr->ia_size);
728 }
65e4308d 729 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
6a97d02d 730 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
1f9f4328
TM		 731 if ((attr->ia_valid & ATTR_KILL_SUID) != 0 &&
732 inode->i_mode & S_ISUID)
733 inode->i_mode &= ~S_ISUID;
734 if ((attr->ia_valid & ATTR_KILL_SGID) != 0 &&
735 (inode->i_mode & (S_ISGID | S_IXGRP)) ==
736 (S_ISGID | S_IXGRP))
737 inode->i_mode &= ~S_ISGID;
1da177e4 738 if ((attr->ia_valid & ATTR_MODE) != 0) {
65e4308d
TM		 739 int mode = attr->ia_mode & S_IALLUGO;
740 mode |= inode->i_mode & ~S_IALLUGO;
1da177e4
LT		 741 inode->i_mode = mode;
742 }
743 if ((attr->ia_valid & ATTR_UID) != 0)
744 inode->i_uid = attr->ia_uid;
745 if ((attr->ia_valid & ATTR_GID) != 0)
746 inode->i_gid = attr->ia_gid;
6a97d02d 747 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 748 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 749 else
750 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
751 | NFS_INO_INVALID_CTIME);
6edf9609
TM		 752 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
753 | NFS_INO_INVALID_ACL);
65e4308d 754 }
6a97d02d
TM		 755 if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
756 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
757 | NFS_INO_INVALID_CTIME);
758 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 759 inode->i_atime = fattr->atime;
6a97d02d
TM		 760 else if (attr->ia_valid & ATTR_ATIME_SET)
761 inode->i_atime = attr->ia_atime;
762 else
763 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
764
765 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 766 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 767 else
768 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
769 | NFS_INO_INVALID_CTIME);
770 }
771 if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
772 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
773 | NFS_INO_INVALID_CTIME);
774 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 775 inode->i_mtime = fattr->mtime;
6a97d02d
TM		 776 else if (attr->ia_valid & ATTR_MTIME_SET)
777 inode->i_mtime = attr->ia_mtime;
778 else
779 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
780
781 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 782 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 783 else
784 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
785 | NFS_INO_INVALID_CTIME);
65e4308d 786 }
616c3196
JL		 787 if (fattr->valid)
788 nfs_update_inode(inode, fattr);
f044636d 789 spin_unlock(&inode->i_lock);
1da177e4 790}
ddda8e0a 791EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
1da177e4 792
1bcf4c5c 793static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
311324ad
TM		 794{
795 struct dentry *parent;
796
1bcf4c5c
TM		 797 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
798 return;
311324ad 799 parent = dget_parent(dentry);
2b0143b5 800 nfs_force_use_readdirplus(d_inode(parent));
311324ad
TM		 801 dput(parent);
802}
803
1bcf4c5c
TM		 804static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
805{
806 struct dentry *parent;
807
808 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
809 return;
810 parent = dget_parent(dentry);
811 nfs_advise_use_readdirplus(d_inode(parent));
812 dput(parent);
813}
814
63cdd7ed 815static u32 nfs_get_valid_attrmask(struct inode *inode)
311324ad 816{
63cdd7ed
TM		 817 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
818 u32 reply_mask = STATX_INO | STATX_TYPE;
819
820 if (!(cache_validity & NFS_INO_INVALID_ATIME))
821 reply_mask |= STATX_ATIME;
13c0b082
TM		 822 if (!(cache_validity & NFS_INO_INVALID_CTIME))
823 reply_mask |= STATX_CTIME;
824 if (!(cache_validity & NFS_INO_INVALID_MTIME))
825 reply_mask |= STATX_MTIME;
826 if (!(cache_validity & NFS_INO_INVALID_SIZE))
827 reply_mask |= STATX_SIZE;
fabf2b34
TM		 828 if (!(cache_validity & NFS_INO_INVALID_NLINK))
829 reply_mask |= STATX_NLINK;
720869eb
TM		 830 if (!(cache_validity & NFS_INO_INVALID_MODE))
831 reply_mask |= STATX_MODE;
63cdd7ed 832 if (!(cache_validity & NFS_INO_INVALID_OTHER))
720869eb 833 reply_mask |= STATX_UID | STATX_GID;
63cdd7ed
TM		 834 if (!(cache_validity & NFS_INO_INVALID_BLOCKS))
835 reply_mask |= STATX_BLOCKS;
836 return reply_mask;
311324ad
TM		 837}
838
549c7297
CB		 839int nfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
840 struct kstat *stat, u32 request_mask, unsigned int query_flags)
1da177e4 841{
a528d35e 842 struct inode *inode = d_inode(path->dentry);
9ccee940
TM		 843 struct nfs_server *server = NFS_SERVER(inode);
844 unsigned long cache_validity;
16caf5b6 845 int err = 0;
9ccee940
TM		 846 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
847 bool do_update = false;
1da177e4 848
f4ce1299 849 trace_nfs_getattr_enter(inode);
9ccee940 850
4eb6a823
TM		 851 request_mask &= STATX_TYPE | STATX_MODE | STATX_NLINK | STATX_UID |
852 STATX_GID | STATX_ATIME | STATX_MTIME | STATX_CTIME |
853 STATX_INO | STATX_SIZE | STATX_BLOCKS;
854
ac7cbb22
TM		 855 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
856 nfs_readdirplus_parent_cache_hit(path->dentry);
63cdd7ed 857 goto out_no_revalidate;
ac7cbb22 858 }
9ccee940 859
acdc53b2 860 /* Flush out writes to the server in order to update c/mtime. */
9ccee940
TM		 861 if ((request_mask & (STATX_CTIME|STATX_MTIME)) &&
862 S_ISREG(inode->i_mode)) {
79566ef0 863 err = filemap_write_and_wait(inode->i_mapping);
acdc53b2
TM		 864 if (err)
865 goto out;
28c494c5 866 }
fc33a7bb
CH		 867
868 /*
869 * We may force a getattr if the user cares about atime.
870 *
871 * Note that we only have to check the vfsmount flags here:
872 * - NFS always sets S_NOATIME by so checking it would give a
873 * bogus result
1751e8a6 874 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
fc33a7bb
CH		 875 * no point in checking those.
876 */
a528d35e
DH		 877 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
878 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
9ccee940
TM		 879 request_mask &= ~STATX_ATIME;
880
881 /* Is the user requesting attributes that might need revalidation? */
882 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
883 STATX_MTIME|STATX_UID|STATX_GID|
884 STATX_SIZE|STATX_BLOCKS)))
885 goto out_no_revalidate;
886
887 /* Check whether the cached attributes are stale */
888 do_update |= force_sync || nfs_attribute_cache_expired(inode);
889 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
e8764a6f 890 do_update |= cache_validity & NFS_INO_INVALID_CHANGE;
9ccee940
TM		 891 if (request_mask & STATX_ATIME)
892 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
e8764a6f
TM		 893 if (request_mask & STATX_CTIME)
894 do_update |= cache_validity & NFS_INO_INVALID_CTIME;
895 if (request_mask & STATX_MTIME)
896 do_update |= cache_validity & NFS_INO_INVALID_MTIME;
897 if (request_mask & STATX_SIZE)
898 do_update |= cache_validity & NFS_INO_INVALID_SIZE;
fabf2b34
TM		 899 if (request_mask & STATX_NLINK)
900 do_update |= cache_validity & NFS_INO_INVALID_NLINK;
720869eb
TM		 901 if (request_mask & STATX_MODE)
902 do_update |= cache_validity & NFS_INO_INVALID_MODE;
903 if (request_mask & (STATX_UID | STATX_GID))
e8764a6f 904 do_update |= cache_validity & NFS_INO_INVALID_OTHER;
3a39e778
ZB		 905 if (request_mask & STATX_BLOCKS)
906 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
63cdd7ed 907
9ccee940
TM		 908 if (do_update) {
909 /* Update the attribute cache */
59b86d85
HT		 910 if (!(server->flags & NFS_MOUNT_NOAC))
911 nfs_readdirplus_parent_cache_miss(path->dentry);
912 else
913 nfs_readdirplus_parent_cache_hit(path->dentry);
311324ad 914 err = __nfs_revalidate_inode(server, inode);
9ccee940
TM		 915 if (err)
916 goto out;
1bcf4c5c 917 } else
a528d35e 918 nfs_readdirplus_parent_cache_hit(path->dentry);
9ccee940
TM		 919out_no_revalidate:
920 /* Only return attributes that were revalidated. */
63cdd7ed
TM		 921 stat->result_mask = nfs_get_valid_attrmask(inode) | request_mask;
922
0d56a451 923 generic_fillattr(&init_user_ns, inode, stat);
9ccee940
TM		 924 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
925 if (S_ISDIR(inode->i_mode))
926 stat->blksize = NFS_SERVER(inode)->dtsize;
acdc53b2 927out:
f4ce1299 928 trace_nfs_getattr_exit(inode, err);
1da177e4
LT		 929 return err;
930}
ddda8e0a 931EXPORT_SYMBOL_GPL(nfs_getattr);
1da177e4 932
f11ac8db
TM		 933static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
934{
2f62b5aa 935 refcount_set(&l_ctx->count, 1);
d51fdb87 936 l_ctx->lockowner = current->files;
f11ac8db 937 INIT_LIST_HEAD(&l_ctx->list);
210c7c17 938 atomic_set(&l_ctx->io_count, 0);
f11ac8db
TM		 939}
940
941static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
942{
1db97eaa 943 struct nfs_lock_context *pos;
f11ac8db 944
1db97eaa 945 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
d51fdb87 946 if (pos->lockowner != current->files)
f11ac8db 947 continue;
1db97eaa
TM		 948 if (refcount_inc_not_zero(&pos->count))
949 return pos;
950 }
f11ac8db
TM		 951 return NULL;
952}
953
954struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
955{
956 struct nfs_lock_context *res, *new = NULL;
2b0143b5 957 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 958
1db97eaa 959 rcu_read_lock();
f11ac8db 960 res = __nfs_find_lock_context(ctx);
1db97eaa 961 rcu_read_unlock();
f11ac8db 962 if (res == NULL) {
f11ac8db
TM		 963 new = kmalloc(sizeof(*new), GFP_KERNEL);
964 if (new == NULL)
b3c54de6 965 return ERR_PTR(-ENOMEM);
f11ac8db
TM		 966 nfs_init_lock_context(new);
967 spin_lock(&inode->i_lock);
968 res = __nfs_find_lock_context(ctx);
969 if (res == NULL) {
15494511
TM		 970 new->open_context = get_nfs_open_context(ctx);
971 if (new->open_context) {
972 list_add_tail_rcu(&new->list,
973 &ctx->lock_context.list);
974 res = new;
975 new = NULL;
976 } else
977 res = ERR_PTR(-EBADF);
f11ac8db 978 }
1db97eaa
TM		 979 spin_unlock(&inode->i_lock);
980 kfree(new);
f11ac8db 981 }
f11ac8db
TM		 982 return res;
983}
1c6dcbe5 984EXPORT_SYMBOL_GPL(nfs_get_lock_context);
f11ac8db
TM		 985
986void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
987{
988 struct nfs_open_context *ctx = l_ctx->open_context;
2b0143b5 989 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 990
2f62b5aa 991 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
f11ac8db 992 return;
1db97eaa 993 list_del_rcu(&l_ctx->list);
f11ac8db 994 spin_unlock(&inode->i_lock);
15494511 995 put_nfs_open_context(ctx);
1db97eaa 996 kfree_rcu(l_ctx, rcu_head);
f11ac8db 997}
1c6dcbe5 998EXPORT_SYMBOL_GPL(nfs_put_lock_context);
f11ac8db 999
7fe5c398
TM		 1000/**
1001 * nfs_close_context - Common close_context() routine NFSv2/v3
1002 * @ctx: pointer to context
1003 * @is_sync: is this a synchronous close
1004 *
5cf9d706
TM		 1005 * Ensure that the attributes are up to date if we're mounted
1006 * with close-to-open semantics and we have cached data that will
1007 * need to be revalidated on open.
7fe5c398
TM		 1008 */
1009void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
1010{
5cf9d706 1011 struct nfs_inode *nfsi;
7fe5c398 1012 struct inode *inode;
7fe5c398
TM		 1013
1014 if (!(ctx->mode & FMODE_WRITE))
1015 return;
1016 if (!is_sync)
1017 return;
2b0143b5 1018 inode = d_inode(ctx->dentry);
58ff4184
TM		 1019 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1020 return;
5cf9d706
TM		 1021 nfsi = NFS_I(inode);
1022 if (inode->i_mapping->nrpages == 0)
1023 return;
1024 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1025 return;
1026 if (!list_empty(&nfsi->open_files))
7fe5c398 1027 return;
1f3208b2 1028 if (NFS_SERVER(inode)->flags & NFS_MOUNT_NOCTO)
7fe5c398 1029 return;
1f3208b2
TM		 1030 nfs_revalidate_inode(inode,
1031 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
7fe5c398 1032}
ddda8e0a 1033EXPORT_SYMBOL_GPL(nfs_close_context);
7fe5c398 1034
532d4def
N		 1035struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
1036 fmode_t f_mode,
1037 struct file *filp)
1da177e4
LT		 1038{
1039 struct nfs_open_context *ctx;
1040
f52720ca 1041 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
1d179d6b 1042 if (!ctx)
5ede7b1c 1043 return ERR_PTR(-ENOMEM);
5ede7b1c
AV		 1044 nfs_sb_active(dentry->d_sb);
1045 ctx->dentry = dget(dentry);
1d179d6b
TM		 1046 if (filp)
1047 ctx->cred = get_cred(filp->f_cred);
1048 else
1049 ctx->cred = get_current_cred();
ca05cbae 1050 rcu_assign_pointer(ctx->ll_cred, NULL);
5ede7b1c
AV		 1051 ctx->state = NULL;
1052 ctx->mode = f_mode;
1053 ctx->flags = 0;
1054 ctx->error = 0;
532d4def 1055 ctx->flock_owner = (fl_owner_t)filp;
5ede7b1c
AV		 1056 nfs_init_lock_context(&ctx->lock_context);
1057 ctx->lock_context.open_context = ctx;
1058 INIT_LIST_HEAD(&ctx->list);
82be417a 1059 ctx->mdsthreshold = NULL;
1da177e4
LT		 1060 return ctx;
1061}
89d77c8f 1062EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
1da177e4
LT		 1063
1064struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1065{
0de43976
TM		 1066 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
1067 return ctx;
1068 return NULL;
1da177e4 1069}
89d77c8f 1070EXPORT_SYMBOL_GPL(get_nfs_open_context);
1da177e4 1071
7fe5c398 1072static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
1da177e4 1073{
2b0143b5 1074 struct inode *inode = d_inode(ctx->dentry);
3d4ff43d 1075 struct super_block *sb = ctx->dentry->d_sb;
3bec63db 1076
0de43976
TM		 1077 if (!refcount_dec_and_test(&ctx->lock_context.count))
1078 return;
5c78f58e 1079 if (!list_empty(&ctx->list)) {
0de43976
TM		 1080 spin_lock(&inode->i_lock);
1081 list_del_rcu(&ctx->list);
ef84303e 1082 spin_unlock(&inode->i_lock);
0de43976 1083 }
5c78f58e
TM		 1084 if (inode != NULL)
1085 NFS_PROTO(inode)->close_context(ctx, is_sync);
a52458b4 1086 put_cred(ctx->cred);
3d4ff43d 1087 dput(ctx->dentry);
322b2b90 1088 nfs_sb_deactive(sb);
ca05cbae 1089 put_rpccred(rcu_dereference_protected(ctx->ll_cred, 1));
82be417a 1090 kfree(ctx->mdsthreshold);
0de43976 1091 kfree_rcu(ctx, rcu_head);
3bec63db
TM		 1092}
1093
a49c3c77
TM		 1094void put_nfs_open_context(struct nfs_open_context *ctx)
1095{
1096 __put_nfs_open_context(ctx, 0);
1097}
89d77c8f 1098EXPORT_SYMBOL_GPL(put_nfs_open_context);
a49c3c77 1099
4eae5014
TM		 1100static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1101{
1102 __put_nfs_open_context(ctx, 1);
1103}
1104
1da177e4
LT		 1105/*
1106 * Ensure that mmap has a recent RPC credential for use when writing out
1107 * shared pages
1108 */
c45ffdd2 1109void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1da177e4 1110{
2b0143b5 1111 struct inode *inode = d_inode(ctx->dentry);
1da177e4
LT		 1112 struct nfs_inode *nfsi = NFS_I(inode);
1113
1da177e4 1114 spin_lock(&inode->i_lock);
1c341b77
TM		 1115 if (list_empty(&nfsi->open_files) &&
1116 (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER))
ac46b3d7
TM		 1117 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA |
1118 NFS_INO_REVAL_FORCED);
0de43976 1119 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1da177e4
LT		 1120 spin_unlock(&inode->i_lock);
1121}
c45ffdd2
TM		 1122EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1123
1124void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1125{
1126 filp->private_data = get_nfs_open_context(ctx);
e97bc663 1127 set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
c45ffdd2
TM		 1128 if (list_empty(&ctx->list))
1129 nfs_inode_attach_open_context(ctx);
1130}
89d77c8f 1131EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1da177e4 1132
d530838b
TM		 1133/*
1134 * Given an inode, search for an open context with the desired characteristics
1135 */
a52458b4 1136struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1da177e4
LT		 1137{
1138 struct nfs_inode *nfsi = NFS_I(inode);
1139 struct nfs_open_context *pos, *ctx = NULL;
1140
0de43976
TM		 1141 rcu_read_lock();
1142 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
65f51603 1143 if (cred != NULL && cred_fscmp(pos->cred, cred) != 0)
d530838b 1144 continue;
1544fa0f
TM		 1145 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1146 continue;
e97bc663
TM		 1147 if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags))
1148 continue;
1544fa0f 1149 ctx = get_nfs_open_context(pos);
0de43976
TM		 1150 if (ctx)
1151 break;
1da177e4 1152 }
0de43976 1153 rcu_read_unlock();
1da177e4
LT		 1154 return ctx;
1155}
1156
aff8d8dc 1157void nfs_file_clear_open_context(struct file *filp)
1da177e4 1158{
cd3758e3 1159 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1da177e4
LT		 1160
1161 if (ctx) {
2b0143b5 1162 struct inode *inode = d_inode(ctx->dentry);
c45ffdd2 1163
e97bc663 1164 clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
0bcbf039
PT		 1165 /*
1166 * We fatal error on write before. Try to writeback
1167 * every page again.
1168 */
1169 if (ctx->error < 0)
1170 invalidate_inode_pages2(inode->i_mapping);
1da177e4 1171 filp->private_data = NULL;
4eae5014 1172 put_nfs_open_context_sync(ctx);
1da177e4
LT		 1173 }
1174}
1175
1176/*
1177 * These allocate and release file read/write context information.
1178 */
1179int nfs_open(struct inode *inode, struct file *filp)
1180{
1181 struct nfs_open_context *ctx;
1da177e4 1182
532d4def 1183 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
5ede7b1c
AV		 1184 if (IS_ERR(ctx))
1185 return PTR_ERR(ctx);
1da177e4
LT		 1186 nfs_file_set_open_context(filp, ctx);
1187 put_nfs_open_context(ctx);
f1fe29b4 1188 nfs_fscache_open_file(inode, filp);
1da177e4
LT		 1189 return 0;
1190}
44942b4e 1191EXPORT_SYMBOL_GPL(nfs_open);
1da177e4 1192
1da177e4
LT		 1193/*
1194 * This function is called whenever some part of NFS notices that
1195 * the cached attributes have to be refreshed.
1196 */
1197int
1198__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1199{
1200 int status = -ESTALE;
1775fd3e 1201 struct nfs4_label *label = NULL;
a3cba2aa 1202 struct nfs_fattr *fattr = NULL;
1da177e4 1203 struct nfs_inode *nfsi = NFS_I(inode);
1da177e4 1204
1e8968c5
NV		 1205 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1206 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1da177e4 1207
f4ce1299
TM		 1208 trace_nfs_revalidate_inode_enter(inode);
1209
85233a7a 1210 if (is_bad_inode(inode))
691beb13 1211 goto out;
1da177e4 1212 if (NFS_STALE(inode))
412d582e 1213 goto out;
7fdc49c4 1214
ac46bd37
TM		 1215 /* pNFS: Attributes aren't updated until we layoutcommit */
1216 if (S_ISREG(inode->i_mode)) {
1217 status = pnfs_sync_inode(inode, false);
1218 if (status)
1219 goto out;
1220 }
1221
a3cba2aa
TM		 1222 status = -ENOMEM;
1223 fattr = nfs_alloc_fattr();
1224 if (fattr == NULL)
1225 goto out;
1226
691beb13 1227 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
14c43f76
DQ		 1228
1229 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1230 if (IS_ERR(label)) {
1231 status = PTR_ERR(label);
1232 goto out;
1233 }
1234
a841b54d
TM		 1235 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr,
1236 label, inode);
1da177e4 1237 if (status != 0) {
1e8968c5 1238 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1da177e4 1239 inode->i_sb->s_id,
1e8968c5 1240 (unsigned long long)NFS_FILEID(inode), status);
c74dfe97
TM		 1241 switch (status) {
1242 case -ETIMEDOUT:
1243 /* A soft timeout occurred. Use cached information? */
1244 if (server->flags & NFS_MOUNT_SOFTREVAL)
1245 status = 0;
1246 break;
1247 case -ESTALE:
1da177e4 1248 if (!S_ISDIR(inode->i_mode))
93ce4af7
TM		 1249 nfs_set_inode_stale(inode);
1250 else
1251 nfs_zap_caches(inode);
1da177e4 1252 }
14c43f76 1253 goto err_out;
1da177e4
LT		 1254 }
1255
a3cba2aa 1256 status = nfs_refresh_inode(inode, fattr);
1da177e4 1257 if (status) {
1e8968c5 1258 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1da177e4 1259 inode->i_sb->s_id,
1e8968c5 1260 (unsigned long long)NFS_FILEID(inode), status);
14c43f76 1261 goto err_out;
1da177e4 1262 }
55296809 1263
24aa1fe6 1264 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
ada70d94 1265 nfs_zap_acl_cache(inode);
55296809 1266
3da580aa
JL		 1267 nfs_setsecurity(inode, fattr, label);
1268
1e8968c5 1269 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1da177e4 1270 inode->i_sb->s_id,
1e8968c5 1271 (unsigned long long)NFS_FILEID(inode));
1da177e4 1272
14c43f76
DQ		 1273err_out:
1274 nfs4_label_free(label);
1275out:
a3cba2aa 1276 nfs_free_fattr(fattr);
f4ce1299 1277 trace_nfs_revalidate_inode_exit(inode, status);
1da177e4
LT		 1278 return status;
1279}
1280
43f291cd 1281int nfs_attribute_cache_expired(struct inode *inode)
d7cf8dd0 1282{
b4d2314b 1283 if (nfs_have_delegated_attributes(inode))
1da177e4 1284 return 0;
d7cf8dd0 1285 return nfs_attribute_timeout(inode);
1da177e4
LT		 1286}
1287
1288/**
1289 * nfs_revalidate_inode - Revalidate the inode attributes
302fad7b 1290 * @inode: pointer to inode struct
1f3208b2 1291 * @flags: cache flags to check
1da177e4
LT		 1292 *
1293 * Updates inode attribute information by retrieving the data from the server.
1294 */
1f3208b2 1295int nfs_revalidate_inode(struct inode *inode, unsigned long flags)
1da177e4 1296{
1f3208b2 1297 if (!nfs_check_cache_invalid(inode, flags))
1da177e4 1298 return NFS_STALE(inode) ? -ESTALE : 0;
1f3208b2 1299 return __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1da177e4 1300}
1c606fb7 1301EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1da177e4 1302
1cda707d 1303static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
717d44e8 1304{
f8806c84
TM		 1305 int ret;
1306
717d44e8 1307 if (mapping->nrpages != 0) {
f8806c84
TM		 1308 if (S_ISREG(inode->i_mode)) {
1309 ret = nfs_sync_mapping(mapping);
1310 if (ret < 0)
1311 return ret;
1312 }
1313 ret = invalidate_inode_pages2(mapping);
717d44e8
TM		 1314 if (ret < 0)
1315 return ret;
1316 }
717d44e8 1317 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
de242c0b 1318 nfs_fscache_wait_on_invalidate(inode);
f4ce1299 1319
1e8968c5
NV		 1320 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1321 inode->i_sb->s_id,
1322 (unsigned long long)NFS_FILEID(inode));
717d44e8
TM		 1323 return 0;
1324}
1325
717d44e8 1326/**
28aa2f9e 1327 * nfs_clear_invalid_mapping - Conditionally clear a mapping
302fad7b 1328 * @mapping: pointer to mapping
28aa2f9e
TM		 1329 *
1330 * If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping.
717d44e8 1331 */
28aa2f9e 1332int nfs_clear_invalid_mapping(struct address_space *mapping)
717d44e8 1333{
28aa2f9e 1334 struct inode *inode = mapping->host;
717d44e8 1335 struct nfs_inode *nfsi = NFS_I(inode);
d529ef83 1336 unsigned long *bitlock = &nfsi->flags;
717d44e8 1337 int ret = 0;
dc59250c 1338
d529ef83
JL		 1339 /*
1340 * We must clear NFS_INO_INVALID_DATA first to ensure that
1341 * invalidations that come in while we're shooting down the mappings
1342 * are respected. But, that leaves a race window where one revalidator
1343 * can clear the flag, and then another checks it before the mapping
1344 * gets invalidated. Fix that by serializing access to this part of
1345 * the function.
1346 *
1347 * At the same time, we need to allow other tasks to see whether we
1348 * might be in the middle of invalidating the pages, so we only set
1349 * the bit lock here if it looks like we're going to be doing that.
1350 */
1351 for (;;) {
74316201
N		 1352 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1353 nfs_wait_bit_killable, TASK_KILLABLE);
d529ef83
JL		 1354 if (ret)
1355 goto out;
17dfeb91
TM		 1356 spin_lock(&inode->i_lock);
1357 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1358 spin_unlock(&inode->i_lock);
1359 continue;
1360 }
1361 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
d529ef83 1362 break;
d529ef83 1363 spin_unlock(&inode->i_lock);
17dfeb91 1364 goto out;
f4ce1299
TM		 1365 }
1366
17dfeb91 1367 set_bit(NFS_INO_INVALIDATING, bitlock);
4db72b40 1368 smp_wmb();
28aa2f9e
TM		 1369 nfsi->cache_validity &=
1370 ~(NFS_INO_INVALID_DATA | NFS_INO_DATA_INVAL_DEFER);
17dfeb91
TM		 1371 spin_unlock(&inode->i_lock);
1372 trace_nfs_invalidate_mapping_enter(inode);
be527494 1373 ret = nfs_invalidate_mapping(inode, mapping);
17dfeb91
TM		 1374 trace_nfs_invalidate_mapping_exit(inode, ret);
1375
d529ef83 1376 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
4e857c58 1377 smp_mb__after_atomic();
d529ef83 1378 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
cd9ae2b6 1379out:
44b11874 1380 return ret;
7d52e862
TM		 1381}
1382
28aa2f9e
TM		 1383bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1384{
13c0b082 1385 return nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE) ||
28aa2f9e
TM		 1386 NFS_STALE(inode);
1387}
1388
1389int nfs_revalidate_mapping_rcu(struct inode *inode)
1390{
1391 struct nfs_inode *nfsi = NFS_I(inode);
1392 unsigned long *bitlock = &nfsi->flags;
1393 int ret = 0;
1394
1395 if (IS_SWAPFILE(inode))
1396 goto out;
1397 if (nfs_mapping_need_revalidate_inode(inode)) {
1398 ret = -ECHILD;
1399 goto out;
1400 }
1401 spin_lock(&inode->i_lock);
1402 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1403 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1404 ret = -ECHILD;
1405 spin_unlock(&inode->i_lock);
1406out:
1407 return ret;
1408}
1409
1410/**
1411 * nfs_revalidate_mapping - Revalidate the pagecache
1412 * @inode: pointer to host inode
1413 * @mapping: pointer to mapping
1414 */
1415int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1416{
1417 /* swapfiles are not supposed to be shared. */
1418 if (IS_SWAPFILE(inode))
1419 return 0;
1420
1421 if (nfs_mapping_need_revalidate_inode(inode)) {
1422 int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1423 if (ret < 0)
1424 return ret;
1425 }
1426
1427 return nfs_clear_invalid_mapping(mapping);
1428}
1429
ca0daa27 1430static bool nfs_file_has_writers(struct nfs_inode *nfsi)
874f9463 1431{
ca0daa27
TM		 1432 struct inode *inode = &nfsi->vfs_inode;
1433
ca0daa27
TM		 1434 if (!S_ISREG(inode->i_mode))
1435 return false;
1436 if (list_empty(&nfsi->open_files))
1437 return false;
6ba0c4e5 1438 return inode_is_open_for_write(inode);
874f9463
TM		 1439}
1440
651b0e70 1441static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
874f9463 1442{
651b0e70 1443 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
874f9463
TM		 1444}
1445
783b194c 1446static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
a895b4a1 1447{
e86d5a02 1448 struct timespec64 ts;
95582b00 1449
9e6e70f8
TM		 1450 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1451 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
c472c07b 1452 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1eb5d98f 1453 inode_set_iversion_raw(inode, fattr->change_attr);
70ca8852 1454 if (S_ISDIR(inode->i_mode))
6edf9609 1455 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
0f44da51
FL		 1456 else if (nfs_server_capable(inode, NFS_CAP_XATTR))
1457 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
70ca8852 1458 }
a895b4a1 1459 /* If we have atomic WCC data, we may update some attributes */
e86d5a02 1460 ts = inode->i_ctime;
9e6e70f8
TM		 1461 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1462 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02
TM		 1463 && timespec64_equal(&ts, &fattr->pre_ctime)) {
1464 inode->i_ctime = fattr->ctime;
27dc1cd3 1465 }
9e6e70f8 1466
e86d5a02 1467 ts = inode->i_mtime;
9e6e70f8
TM		 1468 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1469 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02
TM		 1470 && timespec64_equal(&ts, &fattr->pre_mtime)) {
1471 inode->i_mtime = fattr->mtime;
a895b4a1 1472 }
9e6e70f8
TM		 1473 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1474 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1475 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
a6b6d5b8 1476 && !nfs_have_writebacks(inode)) {
110cb2d2 1477 trace_nfs_size_wcc(inode, fattr->size);
27dc1cd3 1478 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
27dc1cd3 1479 }
a895b4a1
TM		 1480}
1481
1da177e4 1482/**
33801147 1483 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
302fad7b
TM		 1484 * @inode: pointer to inode
1485 * @fattr: updated attributes
1da177e4
LT		 1486 *
1487 * Verifies the attribute cache. If we have just changed the attributes,
1488 * so that fattr carries weak cache consistency data, then it may
1489 * also update the ctime/mtime/change_attribute.
1490 */
33801147 1491static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1da177e4
LT		 1492{
1493 struct nfs_inode *nfsi = NFS_I(inode);
1494 loff_t cur_size, new_isize;
2a3f5fd4 1495 unsigned long invalid = 0;
e86d5a02 1496 struct timespec64 ts;
dc59250c 1497
4ebe83af 1498 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
01da47bd 1499 return 0;
4ebe83af 1500
eb3d8f42
TM		 1501 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1502 /* Only a mounted-on-fileid? Just exit */
1503 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1504 return 0;
ca62b9c3 1505 /* Has the inode gone and changed behind our back? */
eb3d8f42 1506 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 1507 /* Is this perhaps the mounted-on fileid? */
1508 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1509 nfsi->fileid == fattr->mounted_on_fileid)
1510 return 0;
cc89684c 1511 return -ESTALE;
7e10cc25 1512 }
6e3e2c43 1513 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode))
cc89684c 1514 return -ESTALE;
ca62b9c3 1515
7e10cc25 1516
651b0e70 1517 if (!nfs_file_has_buffered_writers(nfsi)) {
ca0daa27 1518 /* Verify a few of the more important attributes */
c472c07b 1519 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
04c63498 1520 invalid |= NFS_INO_INVALID_CHANGE;
1da177e4 1521
e86d5a02
TM		 1522 ts = inode->i_mtime;
1523 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
16e14375 1524 invalid |= NFS_INO_INVALID_MTIME;
ca62b9c3 1525
e86d5a02
TM		 1526 ts = inode->i_ctime;
1527 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
16e14375 1528 invalid |= NFS_INO_INVALID_CTIME;
ca0daa27
TM		 1529
1530 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1531 cur_size = i_size_read(inode);
1532 new_isize = nfs_size_to_loff_t(fattr->size);
1533 if (cur_size != new_isize)
04c63498 1534 invalid |= NFS_INO_INVALID_SIZE;
ca0daa27 1535 }
9e6e70f8 1536 }
1da177e4
LT		 1537
1538 /* Have any file permissions changed? */
9e6e70f8 1539 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
04c63498 1540 invalid |= NFS_INO_INVALID_MODE;
9ff593c4 1541 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
04c63498 1542 invalid |= NFS_INO_INVALID_OTHER;
9ff593c4 1543 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
04c63498 1544 invalid |= NFS_INO_INVALID_OTHER;
1da177e4
LT		 1545
1546 /* Has the link count changed? */
9e6e70f8 1547 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
fabf2b34 1548 invalid |= NFS_INO_INVALID_NLINK;
1da177e4 1549
e86d5a02
TM		 1550 ts = inode->i_atime;
1551 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
2a3f5fd4
TM		 1552 invalid |= NFS_INO_INVALID_ATIME;
1553
1554 if (invalid != 0)
4ebe83af 1555 nfs_set_cache_invalid(inode, invalid);
1da177e4 1556
33801147 1557 nfsi->read_cache_jiffies = fattr->time_start;
1da177e4
LT		 1558 return 0;
1559}
1560
ae05f269 1561static atomic_long_t nfs_attr_generation_counter;
4704f0e2
TM		 1562
1563static unsigned long nfs_read_attr_generation_counter(void)
1564{
ae05f269 1565 return atomic_long_read(&nfs_attr_generation_counter);
4704f0e2
TM		 1566}
1567
1568unsigned long nfs_inc_attr_generation_counter(void)
1569{
ae05f269 1570 return atomic_long_inc_return(&nfs_attr_generation_counter);
4704f0e2 1571}
3235b403 1572EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
4704f0e2
TM		 1573
1574void nfs_fattr_init(struct nfs_fattr *fattr)
1575{
1576 fattr->valid = 0;
1577 fattr->time_start = jiffies;
1578 fattr->gencount = nfs_inc_attr_generation_counter();
6926afd1
TM		 1579 fattr->owner_name = NULL;
1580 fattr->group_name = NULL;
4704f0e2 1581}
ddda8e0a 1582EXPORT_SYMBOL_GPL(nfs_fattr_init);
4704f0e2 1583
140e049c
TM		 1584/**
1585 * nfs_fattr_set_barrier
1586 * @fattr: attributes
1587 *
1588 * Used to set a barrier after an attribute was updated. This
1589 * barrier ensures that older attributes from RPC calls that may
1590 * have raced with our update cannot clobber these new values.
1591 * Note that you are still responsible for ensuring that other
1592 * operations which change the attribute on the server do not
1593 * collide.
1594 */
1595void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1596{
1597 fattr->gencount = nfs_inc_attr_generation_counter();
1598}
1599
2d36bfde
TM		 1600struct nfs_fattr *nfs_alloc_fattr(void)
1601{
1602 struct nfs_fattr *fattr;
1603
1604 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1605 if (fattr != NULL)
1606 nfs_fattr_init(fattr);
1607 return fattr;
1608}
ddda8e0a 1609EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
2d36bfde
TM		 1610
1611struct nfs_fh *nfs_alloc_fhandle(void)
1612{
1613 struct nfs_fh *fh;
1614
1615 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1616 if (fh != NULL)
1617 fh->size = 0;
1618 return fh;
1619}
ddda8e0a 1620EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
2d36bfde 1621
e27d359e 1622#ifdef NFS_DEBUG
d8e0539e
WAA		 1623/*
1624 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1625 * in the same way that wireshark does
1626 *
1627 * @fh: file handle
1628 *
1629 * For debugging only.
1630 */
1631u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1632{
1633 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1634 * not on the result */
1264a2f0 1635 return nfs_fhandle_hash(fh);
d8e0539e 1636}
9e6ee76d 1637EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
d8e0539e
WAA		 1638
1639/*
20d27e92
CL		 1640 * _nfs_display_fhandle - display an NFS file handle on the console
1641 *
1642 * @fh: file handle to display
1643 * @caption: display caption
1644 *
1645 * For debugging only.
1646 */
20d27e92
CL		 1647void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1648{
1649 unsigned short i;
1650
fa68a1ba 1651 if (fh == NULL || fh->size == 0) {
20d27e92
CL		 1652 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1653 return;
1654 }
1655
d8e0539e
WAA		 1656 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1657 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
20d27e92
CL		 1658 for (i = 0; i < fh->size; i += 16) {
1659 __be32 *pos = (__be32 *)&fh->data[i];
1660
1661 switch ((fh->size - i - 1) >> 2) {
1662 case 0:
1663 printk(KERN_DEFAULT " %08x\n",
1664 be32_to_cpup(pos));
1665 break;
1666 case 1:
1667 printk(KERN_DEFAULT " %08x %08x\n",
1668 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1669 break;
1670 case 2:
1671 printk(KERN_DEFAULT " %08x %08x %08x\n",
1672 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1673 be32_to_cpup(pos + 2));
1674 break;
1675 default:
1676 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1677 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1678 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1679 }
1680 }
1681}
9e6ee76d 1682EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
20d27e92
CL		 1683#endif
1684
a10ad176 1685/**
6f9be83d 1686 * nfs_inode_attrs_cmp_generic - compare attributes
302fad7b 1687 * @fattr: attributes
302fad7b 1688 * @inode: pointer to inode
a10ad176
TM		 1689 *
1690 * Attempt to divine whether or not an RPC call reply carrying stale
1691 * attributes got scheduled after another call carrying updated ones.
4704f0e2 1692 * Note also the check for wraparound of 'attr_gencount'
a10ad176 1693 *
6f9be83d
TM		 1694 * The function returns '1' if it thinks the attributes in @fattr are
1695 * more recent than the ones cached in @inode. Otherwise it returns
1696 * the value '0'.
a10ad176 1697 */
6f9be83d
TM		 1698static int nfs_inode_attrs_cmp_generic(const struct nfs_fattr *fattr,
1699 const struct inode *inode)
a10ad176 1700{
9fdbfad1 1701 unsigned long attr_gencount = NFS_I(inode)->attr_gencount;
a10ad176 1702
9fdbfad1
TM		 1703 return (long)(fattr->gencount - attr_gencount) > 0 ||
1704 (long)(attr_gencount - nfs_read_attr_generation_counter()) > 0;
a10ad176
TM		 1705}
1706
6f9be83d
TM		 1707/**
1708 * nfs_inode_attrs_cmp_monotonic - compare attributes
302fad7b 1709 * @fattr: attributes
6f9be83d 1710 * @inode: pointer to inode
a10ad176
TM		 1711 *
1712 * Attempt to divine whether or not an RPC call reply carrying stale
1713 * attributes got scheduled after another call carrying updated ones.
1714 *
6f9be83d
TM		 1715 * We assume that the server observes monotonic semantics for
1716 * the change attribute, so a larger value means that the attributes in
1717 * @fattr are more recent, in which case the function returns the
1718 * value '1'.
1719 * A return value of '0' indicates no measurable change
1720 * A return value of '-1' means that the attributes in @inode are
1721 * more recent.
1722 */
1723static int nfs_inode_attrs_cmp_monotonic(const struct nfs_fattr *fattr,
1724 const struct inode *inode)
a10ad176 1725{
6f9be83d
TM		 1726 s64 diff = fattr->change_attr - inode_peek_iversion_raw(inode);
1727 if (diff > 0)
1728 return 1;
1729 return diff == 0 ? 0 : -1;
1730}
1731
1732/**
1733 * nfs_inode_attrs_cmp_strict_monotonic - compare attributes
1734 * @fattr: attributes
1735 * @inode: pointer to inode
a10ad176 1736 *
6f9be83d
TM		 1737 * Attempt to divine whether or not an RPC call reply carrying stale
1738 * attributes got scheduled after another call carrying updated ones.
a10ad176 1739 *
6f9be83d
TM		 1740 * We assume that the server observes strictly monotonic semantics for
1741 * the change attribute, so a larger value means that the attributes in
1742 * @fattr are more recent, in which case the function returns the
1743 * value '1'.
1744 * A return value of '-1' means that the attributes in @inode are
1745 * more recent or unchanged.
a10ad176 1746 */
6f9be83d
TM		 1747static int nfs_inode_attrs_cmp_strict_monotonic(const struct nfs_fattr *fattr,
1748 const struct inode *inode)
a10ad176 1749{
6f9be83d
TM		 1750 return nfs_inode_attrs_cmp_monotonic(fattr, inode) > 0 ? 1 : -1;
1751}
a10ad176 1752
6f9be83d
TM		 1753/**
1754 * nfs_inode_attrs_cmp - compare attributes
1755 * @fattr: attributes
1756 * @inode: pointer to inode
1757 *
1758 * This function returns '1' if it thinks the attributes in @fattr are
1759 * more recent than the ones cached in @inode. It returns '-1' if
1760 * the attributes in @inode are more recent than the ones in @fattr,
1761 * and it returns 0 if not sure.
1762 */
1763static int nfs_inode_attrs_cmp(const struct nfs_fattr *fattr,
1764 const struct inode *inode)
1765{
1766 if (nfs_inode_attrs_cmp_generic(fattr, inode) > 0)
1767 return 1;
1768 switch (NFS_SERVER(inode)->change_attr_type) {
1769 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
1770 break;
1771 case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
1772 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1773 break;
1774 return nfs_inode_attrs_cmp_monotonic(fattr, inode);
1775 default:
1776 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1777 break;
1778 return nfs_inode_attrs_cmp_strict_monotonic(fattr, inode);
1779 }
1780 return 0;
1781}
1782
7b24dacf
TM		 1783/**
1784 * nfs_inode_finish_partial_attr_update - complete a previous inode update
1785 * @fattr: attributes
1786 * @inode: pointer to inode
1787 *
1788 * Returns '1' if the last attribute update left the inode cached
1789 * attributes in a partially unrevalidated state, and @fattr
1790 * matches the change attribute of that partial update.
1791 * Otherwise returns '0'.
1792 */
1793static int nfs_inode_finish_partial_attr_update(const struct nfs_fattr *fattr,
1794 const struct inode *inode)
1795{
1796 const unsigned long check_valid =
1797 NFS_INO_INVALID_ATIME | NFS_INO_INVALID_CTIME |
1798 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
1799 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_OTHER |
1800 NFS_INO_INVALID_NLINK;
1801 unsigned long cache_validity = NFS_I(inode)->cache_validity;
eea41330 1802 enum nfs4_change_attr_type ctype = NFS_SERVER(inode)->change_attr_type;
7b24dacf 1803
eea41330
TM		 1804 if (ctype != NFS4_CHANGE_TYPE_IS_UNDEFINED &&
1805 !(cache_validity & NFS_INO_INVALID_CHANGE) &&
7b24dacf
TM		 1806 (cache_validity & check_valid) != 0 &&
1807 (fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1808 nfs_inode_attrs_cmp_monotonic(fattr, inode) == 0)
1809 return 1;
1810 return 0;
a10ad176
TM		 1811}
1812
6f9be83d
TM		 1813static int nfs_refresh_inode_locked(struct inode *inode,
1814 struct nfs_fattr *fattr)
a10ad176 1815{
6f9be83d
TM		 1816 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
1817 int ret = 0;
f4ce1299
TM		 1818
1819 trace_nfs_refresh_inode_enter(inode);
1820
7b24dacf 1821 if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode))
f4ce1299 1822 ret = nfs_update_inode(inode, fattr);
6f9be83d 1823 else if (attr_cmp == 0)
f4ce1299
TM		 1824 ret = nfs_check_inode_attributes(inode, fattr);
1825
1826 trace_nfs_refresh_inode_exit(inode, ret);
1827 return ret;
870a5be8
TM		 1828}
1829
33801147
TM		 1830/**
1831 * nfs_refresh_inode - try to update the inode attribute cache
302fad7b
TM		 1832 * @inode: pointer to inode
1833 * @fattr: updated attributes
33801147
TM		 1834 *
1835 * Check that an RPC call that returned attributes has not overlapped with
1836 * other recent updates of the inode metadata, then decide whether it is
1837 * safe to do a full update of the inode attributes, or whether just to
1838 * call nfs_check_inode_attributes.
1839 */
1840int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1841{
33801147
TM		 1842 int status;
1843
1844 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1845 return 0;
1846 spin_lock(&inode->i_lock);
870a5be8 1847 status = nfs_refresh_inode_locked(inode, fattr);
33801147 1848 spin_unlock(&inode->i_lock);
ef79c097 1849
33801147
TM		 1850 return status;
1851}
ddda8e0a 1852EXPORT_SYMBOL_GPL(nfs_refresh_inode);
33801147 1853
16e14375
TM		 1854static int nfs_post_op_update_inode_locked(struct inode *inode,
1855 struct nfs_fattr *fattr, unsigned int invalid)
d65f557f 1856{
6edf9609
TM		 1857 if (S_ISDIR(inode->i_mode))
1858 invalid |= NFS_INO_INVALID_DATA;
1859 nfs_set_cache_invalid(inode, invalid);
d65f557f
TM		 1860 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1861 return 0;
1862 return nfs_refresh_inode_locked(inode, fattr);
1863}
1864
decf491f
TM		 1865/**
1866 * nfs_post_op_update_inode - try to update the inode attribute cache
302fad7b
TM		 1867 * @inode: pointer to inode
1868 * @fattr: updated attributes
decf491f
TM		 1869 *
1870 * After an operation that has changed the inode metadata, mark the
1871 * attribute cache as being invalid, then try to update it.
f551e44f
CL		 1872 *
1873 * NB: if the server didn't return any post op attributes, this
1874 * function will force the retrieval of attributes before the next
1875 * NFS request. Thus it should be used only for operations that
1876 * are expected to change one or more attributes, to avoid
1877 * unnecessary NFS requests and trips through nfs_update_inode().
decf491f
TM		 1878 */
1879int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1880{
d65f557f 1881 int status;
decf491f 1882
7668fdbe 1883 spin_lock(&inode->i_lock);
92d64e47 1884 nfs_fattr_set_barrier(fattr);
16e14375
TM		 1885 status = nfs_post_op_update_inode_locked(inode, fattr,
1886 NFS_INO_INVALID_CHANGE
d554168f
TM		 1887 | NFS_INO_INVALID_CTIME
1888 | NFS_INO_REVAL_FORCED);
7668fdbe 1889 spin_unlock(&inode->i_lock);
aa9c2669 1890
870a5be8 1891 return status;
decf491f 1892}
1c606fb7 1893EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
decf491f 1894
70ca8852 1895/**
a08a8cd3 1896 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
302fad7b
TM		 1897 * @inode: pointer to inode
1898 * @fattr: updated attributes
70ca8852
TM		 1899 *
1900 * After an operation that has changed the inode metadata, mark the
1901 * attribute cache as being invalid, then try to update it. Fake up
1902 * weak cache consistency data, if none exist.
1903 *
1904 * This function is mainly designed to be used by the ->write_done() functions.
1905 */
a08a8cd3 1906int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
70ca8852 1907{
6f9be83d 1908 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
d65f557f
TM		 1909 int status;
1910
d65f557f 1911 /* Don't do a WCC update if these attributes are already stale */
6f9be83d
TM		 1912 if (attr_cmp < 0)
1913 return 0;
1914 if ((fattr->valid & NFS_ATTR_FATTR) == 0 || !attr_cmp) {
9e6e70f8
TM		 1915 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1916 | NFS_ATTR_FATTR_PRESIZE
1917 | NFS_ATTR_FATTR_PREMTIME
1918 | NFS_ATTR_FATTR_PRECTIME);
d65f557f
TM		 1919 goto out_noforce;
1920 }
9e6e70f8
TM		 1921 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1922 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1eb5d98f 1923 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
9e6e70f8 1924 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
70ca8852 1925 }
9e6e70f8
TM		 1926 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1927 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
e86d5a02 1928 fattr->pre_ctime = inode->i_ctime;
9e6e70f8
TM		 1929 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1930 }
1931 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1932 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
e86d5a02 1933 fattr->pre_mtime = inode->i_mtime;
9e6e70f8
TM		 1934 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1935 }
1936 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1937 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
a3d01454 1938 fattr->pre_size = i_size_read(inode);
9e6e70f8 1939 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
70ca8852 1940 }
d65f557f 1941out_noforce:
16e14375
TM		 1942 status = nfs_post_op_update_inode_locked(inode, fattr,
1943 NFS_INO_INVALID_CHANGE
1944 | NFS_INO_INVALID_CTIME
3a39e778
ZB		 1945 | NFS_INO_INVALID_MTIME
1946 | NFS_INO_INVALID_BLOCKS);
a08a8cd3
TM		 1947 return status;
1948}
1949
1950/**
1951 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
302fad7b
TM		 1952 * @inode: pointer to inode
1953 * @fattr: updated attributes
a08a8cd3
TM		 1954 *
1955 * After an operation that has changed the inode metadata, mark the
1956 * attribute cache as being invalid, then try to update it. Fake up
1957 * weak cache consistency data, if none exist.
1958 *
1959 * This function is mainly designed to be used by the ->write_done() functions.
1960 */
1961int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1962{
1963 int status;
1964
1965 spin_lock(&inode->i_lock);
8f8ba1d7 1966 nfs_fattr_set_barrier(fattr);
a08a8cd3 1967 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
d65f557f
TM		 1968 spin_unlock(&inode->i_lock);
1969 return status;
70ca8852 1970}
ddda8e0a 1971EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
70ca8852 1972
ea96d1ec 1973
1da177e4
LT		 1974/*
1975 * Many nfs protocol calls return the new file attributes after
1976 * an operation. Here we update the inode to reflect the state
1977 * of the server's inode.
1978 *
1979 * This is a bit tricky because we have to make sure all dirty pages
1980 * have been sent off to the server before calling invalidate_inode_pages.
1981 * To make sure no other process adds more write requests while we try
1982 * our best to flush them, we make them sleep during the attribute refresh.
1983 *
1984 * A very similar scenario holds for the dir cache.
1985 */
24aa1fe6 1986static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1da177e4 1987{
ce62b114 1988 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1989 struct nfs_inode *nfsi = NFS_I(inode);
951a143b 1990 loff_t cur_isize, new_isize;
ce62b114 1991 u64 fattr_supported = server->fattr_valid;
2a3f5fd4 1992 unsigned long invalid = 0;
3e7d950a 1993 unsigned long now = jiffies;
62ab460c 1994 unsigned long save_cache_validity;
651b0e70 1995 bool have_writers = nfs_file_has_buffered_writers(nfsi);
944171cb 1996 bool cache_revalidated = true;
0b467264 1997 bool attr_changed = false;
c80d17c5 1998 bool have_delegation;
1da177e4 1999
1e8968c5 2000 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
3110ff80 2001 __func__, inode->i_sb->s_id, inode->i_ino,
4f1abd22 2002 nfs_display_fhandle_hash(NFS_FH(inode)),
1da177e4
LT		 2003 atomic_read(&inode->i_count), fattr->valid);
2004
eb3d8f42
TM		 2005 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
2006 /* Only a mounted-on-fileid? Just exit */
2007 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
2008 return 0;
7e10cc25 2009 /* Has the inode gone and changed behind our back? */
eb3d8f42 2010 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 2011 /* Is this perhaps the mounted-on fileid? */
2012 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
2013 nfsi->fileid == fattr->mounted_on_fileid)
2014 return 0;
e73e6c9e
MT		 2015 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
2016 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
2017 NFS_SERVER(inode)->nfs_client->cl_hostname,
2018 inode->i_sb->s_id, (long long)nfsi->fileid,
2019 (long long)fattr->fileid);
2020 goto out_err;
2021 }
1da177e4
LT		 2022
2023 /*
2024 * Make sure the inode's type hasn't changed.
2025 */
6e3e2c43 2026 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) {
e73e6c9e
MT		 2027 /*
2028 * Big trouble! The inode has become a different object.
2029 */
1e8968c5 2030 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
e73e6c9e
MT		 2031 __func__, inode->i_ino, inode->i_mode, fattr->mode);
2032 goto out_err;
2033 }
1da177e4 2034
a0356862 2035 /* Update the fsid? */
9e6e70f8 2036 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
c37dcd33 2037 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
36d43a43 2038 !IS_AUTOMOUNT(inode))
8b4bdcf8
TM		 2039 server->fsid = fattr->fsid;
2040
c80d17c5
TM		 2041 /* Save the delegation state before clearing cache_validity */
2042 have_delegation = nfs_have_delegated_attributes(inode);
2043
1da177e4
LT		 2044 /*
2045 * Update the read time so we don't revalidate too often.
2046 */
33801147 2047 nfsi->read_cache_jiffies = fattr->time_start;
3e7d950a 2048
62ab460c
TM		 2049 save_cache_validity = nfsi->cache_validity;
2050 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
2051 | NFS_INO_INVALID_ATIME
2052 | NFS_INO_REVAL_FORCED
3a39e778 2053 | NFS_INO_INVALID_BLOCKS);
1da177e4 2054
a895b4a1 2055 /* Do atomic weak cache consistency updates */
783b194c 2056 nfs_wcc_update_inode(inode, fattr);
a895b4a1 2057
944171cb 2058 if (pnfs_layoutcommit_outstanding(inode)) {
709fa576
TM		 2059 nfsi->cache_validity |=
2060 save_cache_validity &
2061 (NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |
2062 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
cc7f2dae 2063 NFS_INO_INVALID_BLOCKS);
944171cb
BC		 2064 cache_revalidated = false;
2065 }
10b7e9ad 2066
47aabaa7 2067 /* More cache consistency checks */
9e6e70f8 2068 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
c472c07b 2069 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
38512aa9 2070 /* Could it be a race with writeback? */
c80d17c5 2071 if (!(have_writers || have_delegation)) {
0b467264 2072 invalid |= NFS_INO_INVALID_DATA
38512aa9 2073 | NFS_INO_INVALID_ACCESS
95ad37f9
FL		 2074 | NFS_INO_INVALID_ACL
2075 | NFS_INO_INVALID_XATTR;
cac88f94 2076 /* Force revalidate of all attributes */
16e14375
TM		 2077 save_cache_validity |= NFS_INO_INVALID_CTIME
2078 | NFS_INO_INVALID_MTIME
2079 | NFS_INO_INVALID_SIZE
4cdfeb64 2080 | NFS_INO_INVALID_BLOCKS
fabf2b34 2081 | NFS_INO_INVALID_NLINK
720869eb 2082 | NFS_INO_INVALID_MODE
16e14375 2083 | NFS_INO_INVALID_OTHER;
38512aa9
TM		 2084 if (S_ISDIR(inode->i_mode))
2085 nfs_force_lookup_revalidate(inode);
a9601ac5 2086 attr_changed = true;
c80d17c5
TM		 2087 dprintk("NFS: change_attr change on server for file %s/%ld\n",
2088 inode->i_sb->s_id,
2089 inode->i_ino);
1c341b77
TM		 2090 } else if (!have_delegation)
2091 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1eb5d98f 2092 inode_set_iversion_raw(inode, fattr->change_attr);
9e6e70f8 2093 }
ade14a7d 2094 } else {
cc7f2dae
TM		 2095 nfsi->cache_validity |=
2096 save_cache_validity & NFS_INO_INVALID_CHANGE;
213bb584
TM		 2097 if (!have_delegation ||
2098 (nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0)
2099 cache_revalidated = false;
ade14a7d 2100 }
9e6e70f8 2101
213bb584 2102 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 2103 inode->i_mtime = fattr->mtime;
213bb584 2104 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
cc7f2dae
TM		 2105 nfsi->cache_validity |=
2106 save_cache_validity & NFS_INO_INVALID_MTIME;
62ab460c 2107
213bb584 2108 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 2109 inode->i_ctime = fattr->ctime;
213bb584 2110 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
cc7f2dae
TM		 2111 nfsi->cache_validity |=
2112 save_cache_validity & NFS_INO_INVALID_CTIME;
47aabaa7 2113
951a143b 2114 /* Check if our cached file size is stale */
9e6e70f8
TM		 2115 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
2116 new_isize = nfs_size_to_loff_t(fattr->size);
2117 cur_isize = i_size_read(inode);
c80d17c5 2118 if (new_isize != cur_isize && !have_delegation) {
9e6e70f8
TM		 2119 /* Do we perhaps have any outstanding writes, or has
2120 * the file grown beyond our last write? */
a6b6d5b8 2121 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
110cb2d2 2122 trace_nfs_size_update(inode, new_isize);
9e6e70f8 2123 i_size_write(inode, new_isize);
ca0daa27 2124 if (!have_writers)
16e14375 2125 invalid |= NFS_INO_INVALID_DATA;
9e6e70f8 2126 }
1da177e4 2127 }
4cdfeb64
TM		 2128 if (new_isize == 0 &&
2129 !(fattr->valid & (NFS_ATTR_FATTR_SPACE_USED |
2130 NFS_ATTR_FATTR_BLOCKS_USED))) {
2131 fattr->du.nfs3.used = 0;
2132 fattr->valid |= NFS_ATTR_FATTR_SPACE_USED;
2133 }
213bb584 2134 } else
cc7f2dae
TM		 2135 nfsi->cache_validity |=
2136 save_cache_validity & NFS_INO_INVALID_SIZE;
1da177e4 2137
9e6e70f8 2138 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 2139 inode->i_atime = fattr->atime;
213bb584 2140 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
cc7f2dae
TM		 2141 nfsi->cache_validity |=
2142 save_cache_validity & NFS_INO_INVALID_ATIME;
1da177e4 2143
9e6e70f8
TM		 2144 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
2145 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
9b4b3513
TM		 2146 umode_t newmode = inode->i_mode & S_IFMT;
2147 newmode |= fattr->mode & S_IALLUGO;
2148 inode->i_mode = newmode;
16e14375 2149 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2150 | NFS_INO_INVALID_ACL;
9e6e70f8 2151 }
213bb584 2152 } else if (fattr_supported & NFS_ATTR_FATTR_MODE)
cc7f2dae
TM		 2153 nfsi->cache_validity |=
2154 save_cache_validity & NFS_INO_INVALID_MODE;
62ab460c 2155
9e6e70f8 2156 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
9ff593c4 2157 if (!uid_eq(inode->i_uid, fattr->uid)) {
16e14375 2158 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2159 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2160 inode->i_uid = fattr->uid;
2161 }
213bb584 2162 } else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
cc7f2dae
TM		 2163 nfsi->cache_validity |=
2164 save_cache_validity & NFS_INO_INVALID_OTHER;
62ab460c 2165
9e6e70f8 2166 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
9ff593c4 2167 if (!gid_eq(inode->i_gid, fattr->gid)) {
16e14375 2168 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2169 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2170 inode->i_gid = fattr->gid;
2171 }
213bb584 2172 } else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
cc7f2dae
TM		 2173 nfsi->cache_validity |=
2174 save_cache_validity & NFS_INO_INVALID_OTHER;
921615f1 2175
9e6e70f8 2176 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
36a10a3c 2177 if (inode->i_nlink != fattr->nlink)
bfe86848 2178 set_nlink(inode, fattr->nlink);
213bb584 2179 } else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
cc7f2dae
TM		 2180 nfsi->cache_validity |=
2181 save_cache_validity & NFS_INO_INVALID_NLINK;
1da177e4 2182
9e6e70f8 2183 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 2184 /*
2185 * report the blocks in 512byte units
2186 */
2187 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
213bb584 2188 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED)
ce62b114
TM		 2189 nfsi->cache_validity |=
2190 save_cache_validity & NFS_INO_INVALID_BLOCKS;
ce62b114 2191
213bb584 2192 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
9e6e70f8 2193 inode->i_blocks = fattr->du.nfs2.blocks;
213bb584 2194 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED)
cc7f2dae
TM		 2195 nfsi->cache_validity |=
2196 save_cache_validity & NFS_INO_INVALID_BLOCKS;
1da177e4
LT		 2197
2198 /* Update attrtimeo value if we're out of the unstable period */
0b467264 2199 if (attr_changed) {
91d5b470 2200 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1da177e4 2201 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
3e7d950a 2202 nfsi->attrtimeo_timestamp = now;
f5062003 2203 /* Set barrier to be more recent than all outstanding updates */
4704f0e2 2204 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
6d2b2966 2205 } else {
ade14a7d
TM		 2206 if (cache_revalidated) {
2207 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2208 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2209 nfsi->attrtimeo <<= 1;
2210 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2211 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2212 }
6d2b2966
TM		 2213 nfsi->attrtimeo_timestamp = now;
2214 }
f5062003 2215 /* Set the barrier to be more recent than this fattr */
9fdbfad1 2216 if ((long)(fattr->gencount - nfsi->attr_gencount) > 0)
f5062003 2217 nfsi->attr_gencount = fattr->gencount;
1da177e4 2218 }
c812012f 2219
1da177e4
LT		 2220 /* Don't invalidate the data if we were to blame */
2221 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2222 || S_ISLNK(inode->i_mode)))
2223 invalid &= ~NFS_INO_INVALID_DATA;
c80d17c5 2224 nfs_set_cache_invalid(inode, invalid);
de242c0b 2225
1da177e4 2226 return 0;
b37b03b7 2227 out_err:
1da177e4
LT		 2228 /*
2229 * No need to worry about unhashing the dentry, as the
2230 * lookup validation will know that the inode is bad.
2231 * (But we fall through to invalidate the caches.)
2232 */
93ce4af7 2233 nfs_set_inode_stale_locked(inode);
1da177e4
LT		 2234 return -ESTALE;
2235}
2236
f7b422b1 2237struct inode *nfs_alloc_inode(struct super_block *sb)
1da177e4
LT		 2238{
2239 struct nfs_inode *nfsi;
c456aacf 2240 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 2241 if (!nfsi)
2242 return NULL;
55296809
CL		 2243 nfsi->flags = 0UL;
2244 nfsi->cache_validity = 0UL;
89d77c8f 2245#if IS_ENABLED(CONFIG_NFS_V4)
e50a1c2e
BF		 2246 nfsi->nfs4_acl = NULL;
2247#endif /* CONFIG_NFS_V4 */
95ad37f9
FL		 2248#ifdef CONFIG_NFS_V4_2
2249 nfsi->xattr_cache = NULL;
2250#endif
1da177e4
LT		 2251 return &nfsi->vfs_inode;
2252}
89d77c8f 2253EXPORT_SYMBOL_GPL(nfs_alloc_inode);
1da177e4 2254
ca1a199e 2255void nfs_free_inode(struct inode *inode)
1da177e4
LT		 2256{
2257 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2258}
ca1a199e 2259EXPORT_SYMBOL_GPL(nfs_free_inode);
fa0d7e3d 2260
d75d5414
AM		 2261static inline void nfs4_init_once(struct nfs_inode *nfsi)
2262{
89d77c8f 2263#if IS_ENABLED(CONFIG_NFS_V4)
d75d5414
AM		 2264 INIT_LIST_HEAD(&nfsi->open_states);
2265 nfsi->delegation = NULL;
d75d5414 2266 init_rwsem(&nfsi->rwsem);
e5e94017 2267 nfsi->layout = NULL;
d75d5414
AM		 2268#endif
2269}
f7b422b1 2270
51cc5068 2271static void init_once(void *foo)
1da177e4
LT		 2272{
2273 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2274
a35afb83 2275 inode_init_once(&nfsi->vfs_inode);
a35afb83
CL		 2276 INIT_LIST_HEAD(&nfsi->open_files);
2277 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2278 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
a35afb83 2279 nfs4_init_once(nfsi);
1da177e4 2280}
20c2df83 2281
f7b422b1 2282static int __init nfs_init_inodecache(void)
1da177e4
LT		 2283{
2284 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2285 sizeof(struct nfs_inode),
fffb60f9 2286 0, (SLAB_RECLAIM_ACCOUNT|
5d097056 2287 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
20c2df83 2288 init_once);
1da177e4
LT		 2289 if (nfs_inode_cachep == NULL)
2290 return -ENOMEM;
2291
2292 return 0;
2293}
2294
266bee88 2295static void nfs_destroy_inodecache(void)
1da177e4 2296{
8c0a8537
KS		 2297 /*
2298 * Make sure all delayed rcu free inodes are flushed before we
2299 * destroy cache.
2300 */
2301 rcu_barrier();
1a1d92c1 2302 kmem_cache_destroy(nfs_inode_cachep);
1da177e4
LT		 2303}
2304
5746006f 2305struct workqueue_struct *nfsiod_workqueue;
89d77c8f 2306EXPORT_SYMBOL_GPL(nfsiod_workqueue);
5746006f
TM		 2307
2308/*
2309 * start up the nfsiod workqueue
2310 */
2311static int nfsiod_start(void)
2312{
2313 struct workqueue_struct *wq;
2314 dprintk("RPC: creating workqueue nfsiod\n");
bf701b76 2315 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
5746006f
TM		 2316 if (wq == NULL)
2317 return -ENOMEM;
2318 nfsiod_workqueue = wq;
2319 return 0;
2320}
2321
2322/*
2323 * Destroy the nfsiod workqueue
2324 */
2325static void nfsiod_stop(void)
2326{
2327 struct workqueue_struct *wq;
2328
2329 wq = nfsiod_workqueue;
2330 if (wq == NULL)
2331 return;
2332 nfsiod_workqueue = NULL;
2333 destroy_workqueue(wq);
2334}
2335
c7d03a00 2336unsigned int nfs_net_id;
9e2e74db 2337EXPORT_SYMBOL_GPL(nfs_net_id);
1b340d01
SK		 2338
2339static int nfs_net_init(struct net *net)
2340{
6b13168b 2341 nfs_clients_init(net);
65b38851 2342 return nfs_fs_proc_net_init(net);
1b340d01
SK		 2343}
2344
2345static void nfs_net_exit(struct net *net)
2346{
65b38851 2347 nfs_fs_proc_net_exit(net);
10b7a70c 2348 nfs_clients_exit(net);
1b340d01
SK		 2349}
2350
2351static struct pernet_operations nfs_net_ops = {
2352 .init = nfs_net_init,
2353 .exit = nfs_net_exit,
2354 .id = &nfs_net_id,
2355 .size = sizeof(struct nfs_net),
2356};
2357
1da177e4
LT		 2358/*
2359 * Initialize NFS
2360 */
2361static int __init init_nfs_fs(void)
2362{
2363 int err;
2364
996bc4f4
TM		 2365 err = nfs_sysfs_init();
2366 if (err < 0)
2367 goto out10;
2368
1b340d01 2369 err = register_pernet_subsys(&nfs_net_ops);
e571cbf1 2370 if (err < 0)
89d77c8f 2371 goto out9;
e571cbf1 2372
8ec442ae
DH		 2373 err = nfs_fscache_register();
2374 if (err < 0)
89d77c8f 2375 goto out8;
8ec442ae 2376
5746006f
TM		 2377 err = nfsiod_start();
2378 if (err)
89d77c8f 2379 goto out7;
5746006f 2380
6aaca566
DH		 2381 err = nfs_fs_proc_init();
2382 if (err)
89d77c8f 2383 goto out6;
6aaca566 2384
1da177e4
LT		 2385 err = nfs_init_nfspagecache();
2386 if (err)
89d77c8f 2387 goto out5;
1da177e4
LT		 2388
2389 err = nfs_init_inodecache();
2390 if (err)
89d77c8f 2391 goto out4;
1da177e4
LT		 2392
2393 err = nfs_init_readpagecache();
2394 if (err)
89d77c8f 2395 goto out3;
1da177e4
LT		 2396
2397 err = nfs_init_writepagecache();
2398 if (err)
89d77c8f 2399 goto out2;
1da177e4 2400
1da177e4
LT		 2401 err = nfs_init_directcache();
2402 if (err)
89d77c8f 2403 goto out1;
1da177e4 2404
ec7652aa 2405 rpc_proc_register(&init_net, &nfs_rpcstat);
cd738ee9
KM		 2406
2407 err = register_nfs_fs();
2408 if (err)
129d1977
BS		 2409 goto out0;
2410
1da177e4 2411 return 0;
129d1977 2412out0:
ec7652aa 2413 rpc_proc_unregister(&init_net, "nfs");
1da177e4 2414 nfs_destroy_directcache();
89d77c8f 2415out1:
129d1977 2416 nfs_destroy_writepagecache();
89d77c8f 2417out2:
129d1977 2418 nfs_destroy_readpagecache();
89d77c8f 2419out3:
129d1977 2420 nfs_destroy_inodecache();
89d77c8f 2421out4:
129d1977 2422 nfs_destroy_nfspagecache();
89d77c8f 2423out5:
129d1977 2424 nfs_fs_proc_exit();
89d77c8f 2425out6:
129d1977 2426 nfsiod_stop();
89d77c8f 2427out7:
129d1977 2428 nfs_fscache_unregister();
89d77c8f 2429out8:
129d1977 2430 unregister_pernet_subsys(&nfs_net_ops);
89d77c8f 2431out9:
996bc4f4
TM		 2432 nfs_sysfs_exit();
2433out10:
1da177e4
LT		 2434 return err;
2435}
2436
2437static void __exit exit_nfs_fs(void)
2438{
1da177e4 2439 nfs_destroy_directcache();
1da177e4
LT		 2440 nfs_destroy_writepagecache();
2441 nfs_destroy_readpagecache();
2442 nfs_destroy_inodecache();
2443 nfs_destroy_nfspagecache();
8ec442ae 2444 nfs_fscache_unregister();
1b340d01 2445 unregister_pernet_subsys(&nfs_net_ops);
ec7652aa 2446 rpc_proc_unregister(&init_net, "nfs");
f7b422b1 2447 unregister_nfs_fs();
6aaca566 2448 nfs_fs_proc_exit();
5746006f 2449 nfsiod_stop();
996bc4f4 2450 nfs_sysfs_exit();
1da177e4
LT		 2451}
2452
2453/* Not quite true; I just maintain it */
2454MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2455MODULE_LICENSE("GPL");
f43bf0be 2456module_param(enable_ino64, bool, 0644);
1da177e4
LT		 2457
2458module_init(init_nfs_fs)
2459module_exit(exit_nfs_fs)
Linux 6.x block layer and io_uring tree(s)