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NFS: Don't set NFS_INO_DATA_INVAL_DEFER and NFS_INO_INVALID_DATA
[mirror_ubuntu-jammy-kernel.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);
fbd69703 214
6edf9609 215 nfsi->cache_validity |= flags;
fbd69703
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
1da177e4
LT		 434/*
435 * This is our front-end to iget that looks up inodes by file handle
436 * instead of inode number.
437 */
438struct inode *
1775fd3e 439nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 440{
441 struct nfs_find_desc desc = {
442 .fh = fh,
443 .fattr = fattr
444 };
03f28e3a 445 struct inode *inode = ERR_PTR(-ENOENT);
ce62b114 446 u64 fattr_supported = NFS_SB(sb)->fattr_valid;
1da177e4
LT		 447 unsigned long hash;
448
7ebb9315
BS		 449 nfs_attr_check_mountpoint(sb, fattr);
450
2ef47eb1
AS		 451 if (nfs_attr_use_mounted_on_fileid(fattr))
452 fattr->fileid = fattr->mounted_on_fileid;
453 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
1da177e4 454 goto out_no_inode;
9e6e70f8 455 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
1da177e4 456 goto out_no_inode;
1da177e4
LT		 457
458 hash = nfs_fattr_to_ino_t(fattr);
459
03f28e3a
TM		 460 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
461 if (inode == NULL) {
462 inode = ERR_PTR(-ENOMEM);
1da177e4 463 goto out_no_inode;
03f28e3a 464 }
1da177e4
LT		 465
466 if (inode->i_state & I_NEW) {
467 struct nfs_inode *nfsi = NFS_I(inode);
b0c4fddc 468 unsigned long now = jiffies;
1da177e4
LT		 469
470 /* We set i_ino for the few things that still rely on it,
471 * such as stat(2) */
472 inode->i_ino = hash;
473
474 /* We can't support update_atime(), since the server will reset it */
475 inode->i_flags |= S_NOATIME|S_NOCMTIME;
476 inode->i_mode = fattr->mode;
821a868a 477 nfsi->cache_validity = 0;
62ab460c 478 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
ce62b114 479 && (fattr_supported & NFS_ATTR_FATTR_MODE))
720869eb 480 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
1da177e4
LT		 481 /* Why so? Because we want revalidate for devices/FIFOs, and
482 * that's precisely what we have in nfs_file_inode_operations.
483 */
8fa5c000 484 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
1da177e4 485 if (S_ISREG(inode->i_mode)) {
1788ea6e 486 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
1da177e4 487 inode->i_data.a_ops = &nfs_file_aops;
1da177e4 488 } else if (S_ISDIR(inode->i_mode)) {
8fa5c000 489 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
1da177e4 490 inode->i_fop = &nfs_dir_operations;
11de3b11 491 inode->i_data.a_ops = &nfs_dir_aops;
55a97593 492 /* Deal with crossing mountpoints */
7ebb9315
BS		 493 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
494 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
6b97fd3d
MN		 495 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
496 inode->i_op = &nfs_referral_inode_operations;
497 else
498 inode->i_op = &nfs_mountpoint_inode_operations;
55a97593 499 inode->i_fop = NULL;
36d43a43 500 inode->i_flags |= S_AUTOMOUNT;
55a97593 501 }
21fc61c7 502 } else if (S_ISLNK(inode->i_mode)) {
1da177e4 503 inode->i_op = &nfs_symlink_inode_operations;
21fc61c7
AV		 504 inode_nohighmem(inode);
505 } else
1da177e4
LT		 506 init_special_inode(inode, inode->i_mode, fattr->rdev);
507
9e6e70f8
TM		 508 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
509 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
510 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
1eb5d98f 511 inode_set_iversion_raw(inode, 0);
9e6e70f8 512 inode->i_size = 0;
6d6b77f1 513 clear_nlink(inode);
9ff593c4
EB		 514 inode->i_uid = make_kuid(&init_user_ns, -2);
515 inode->i_gid = make_kgid(&init_user_ns, -2);
9e6e70f8
TM		 516 inode->i_blocks = 0;
517 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
2701d086
AA		 518 nfsi->write_io = 0;
519 nfsi->read_io = 0;
9e6e70f8 520
33801147 521 nfsi->read_cache_jiffies = fattr->time_start;
4704f0e2 522 nfsi->attr_gencount = fattr->gencount;
9e6e70f8 523 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 524 inode->i_atime = fattr->atime;
ce62b114 525 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
16e14375 526 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
9e6e70f8 527 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 528 inode->i_mtime = fattr->mtime;
ce62b114 529 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
16e14375 530 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
9e6e70f8 531 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 532 inode->i_ctime = fattr->ctime;
ce62b114 533 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
16e14375 534 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
9e6e70f8 535 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1eb5d98f 536 inode_set_iversion_raw(inode, fattr->change_attr);
cd812599 537 else
16e14375 538 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
9e6e70f8
TM		 539 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
540 inode->i_size = nfs_size_to_loff_t(fattr->size);
62ab460c 541 else
16e14375 542 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
9e6e70f8 543 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
bfe86848 544 set_nlink(inode, fattr->nlink);
ce62b114 545 else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
fabf2b34 546 nfs_set_cache_invalid(inode, NFS_INO_INVALID_NLINK);
9e6e70f8
TM		 547 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
548 inode->i_uid = fattr->uid;
ce62b114 549 else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
16e14375 550 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
9e6e70f8
TM		 551 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
552 inode->i_gid = fattr->gid;
ce62b114 553 else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
16e14375 554 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
0f44da51
FL		 555 if (nfs_server_capable(inode, NFS_CAP_XATTR))
556 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
9e6e70f8
TM		 557 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
558 inode->i_blocks = fattr->du.nfs2.blocks;
ce62b114
TM		 559 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED &&
560 fattr->size != 0)
561 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
9e6e70f8 562 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 563 /*
564 * report the blocks in 512byte units
565 */
566 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
ce62b114
TM		 567 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED &&
568 fattr->size != 0)
4cdfeb64 569 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
821a868a 570
aa9c2669
DQ		 571 nfs_setsecurity(inode, fattr, label);
572
1da177e4 573 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
b0c4fddc 574 nfsi->attrtimeo_timestamp = now;
1c3c07e9 575 nfsi->access_cache = RB_ROOT;
1da177e4 576
f1fe29b4 577 nfs_fscache_init_inode(inode);
ef79c097 578
1da177e4 579 unlock_new_inode(inode);
26fde4df
N		 580 } else {
581 int err = nfs_refresh_inode(inode, fattr);
582 if (err < 0) {
583 iput(inode);
584 inode = ERR_PTR(err);
585 goto out_no_inode;
586 }
587 }
1e8968c5 588 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
1da177e4 589 inode->i_sb->s_id,
1e8968c5 590 (unsigned long long)NFS_FILEID(inode),
4f1abd22 591 nfs_display_fhandle_hash(fh),
1da177e4
LT		 592 atomic_read(&inode->i_count));
593
594out:
595 return inode;
596
597out_no_inode:
03f28e3a 598 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
1da177e4
LT		 599 goto out;
600}
89d77c8f 601EXPORT_SYMBOL_GPL(nfs_fhget);
1da177e4 602
536e43d1 603#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		 604
605int
549c7297
CB		 606nfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
607 struct iattr *attr)
1da177e4 608{
2b0143b5 609 struct inode *inode = d_inode(dentry);
987f8dfc 610 struct nfs_fattr *fattr;
ae57ca0f 611 int error = 0;
1da177e4 612
91d5b470
CL		 613 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
614
188b95dd
JL		 615 /* skip mode change if it's just for clearing setuid/setgid */
616 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
617 attr->ia_valid &= ~ATTR_MODE;
618
1da177e4 619 if (attr->ia_valid & ATTR_SIZE) {
08a899d5
CH		 620 BUG_ON(!S_ISREG(inode->i_mode));
621
ae57ca0f
KM		 622 error = inode_newsize_ok(inode, attr->ia_size);
623 if (error)
624 return error;
625
626 if (attr->ia_size == i_size_read(inode))
1da177e4
LT		 627 attr->ia_valid &= ~ATTR_SIZE;
628 }
629
630 /* Optimization: if the end result is no change, don't RPC */
1f9f4328 631 if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0)
1da177e4
LT		 632 return 0;
633
f4ce1299
TM		 634 trace_nfs_setattr_enter(inode);
635
755c1e20 636 /* Write all dirty data */
4d346bea
TM		 637 if (S_ISREG(inode->i_mode))
638 nfs_sync_inode(inode);
987f8dfc
TM		 639
640 fattr = nfs_alloc_fattr();
ae57ca0f
KM		 641 if (fattr == NULL) {
642 error = -ENOMEM;
987f8dfc 643 goto out;
ae57ca0f
KM		 644 }
645
987f8dfc 646 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
65e4308d 647 if (error == 0)
aa9c2669 648 error = nfs_refresh_inode(inode, fattr);
987f8dfc
TM		 649 nfs_free_fattr(fattr);
650out:
f4ce1299 651 trace_nfs_setattr_exit(inode, error);
65e4308d
TM		 652 return error;
653}
ddda8e0a 654EXPORT_SYMBOL_GPL(nfs_setattr);
65e4308d 655
a3d01454
TM		 656/**
657 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
658 * @inode: inode of the file used
659 * @offset: file offset to start truncating
660 *
661 * This is a copy of the common vmtruncate, but with the locking
662 * corrected to take into account the fact that NFS requires
663 * inode->i_size to be updated under the inode->i_lock.
f044636d 664 * Note: must be called with inode->i_lock held!
a3d01454
TM		 665 */
666static int nfs_vmtruncate(struct inode * inode, loff_t offset)
667{
c08d3b0e 668 int err;
a3d01454 669
c08d3b0e
NP		 670 err = inode_newsize_ok(inode, offset);
671 if (err)
672 goto out;
a3d01454 673
c08d3b0e 674 i_size_write(inode, offset);
6edf9609
TM		 675 /* Optimisation */
676 if (offset == 0)
1c341b77
TM		 677 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA |
678 NFS_INO_DATA_INVAL_DEFER);
f6cdfa6d 679 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
c08d3b0e 680
f044636d 681 spin_unlock(&inode->i_lock);
7caef267 682 truncate_pagecache(inode, offset);
f044636d 683 spin_lock(&inode->i_lock);
c08d3b0e
NP		 684out:
685 return err;
a3d01454
TM		 686}
687
65e4308d
TM		 688/**
689 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
690 * @inode: pointer to struct inode
691 * @attr: pointer to struct iattr
16e14375 692 * @fattr: pointer to struct nfs_fattr
65e4308d
TM		 693 *
694 * Note: we do this in the *proc.c in order to ensure that
695 * it works for things like exclusive creates too.
696 */
f044636d
TM		 697void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
698 struct nfs_fattr *fattr)
65e4308d 699{
f044636d
TM		 700 /* Barrier: bump the attribute generation count. */
701 nfs_fattr_set_barrier(fattr);
702
703 spin_lock(&inode->i_lock);
704 NFS_I(inode)->attr_gencount = fattr->gencount;
6a97d02d 705 if ((attr->ia_valid & ATTR_SIZE) != 0) {
4cdfeb64
TM		 706 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME |
707 NFS_INO_INVALID_BLOCKS);
6a97d02d
TM		 708 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
709 nfs_vmtruncate(inode, attr->ia_size);
710 }
65e4308d 711 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
6a97d02d 712 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
1f9f4328
TM		 713 if ((attr->ia_valid & ATTR_KILL_SUID) != 0 &&
714 inode->i_mode & S_ISUID)
715 inode->i_mode &= ~S_ISUID;
716 if ((attr->ia_valid & ATTR_KILL_SGID) != 0 &&
717 (inode->i_mode & (S_ISGID | S_IXGRP)) ==
718 (S_ISGID | S_IXGRP))
719 inode->i_mode &= ~S_ISGID;
1da177e4 720 if ((attr->ia_valid & ATTR_MODE) != 0) {
65e4308d
TM		 721 int mode = attr->ia_mode & S_IALLUGO;
722 mode |= inode->i_mode & ~S_IALLUGO;
1da177e4
LT		 723 inode->i_mode = mode;
724 }
725 if ((attr->ia_valid & ATTR_UID) != 0)
726 inode->i_uid = attr->ia_uid;
727 if ((attr->ia_valid & ATTR_GID) != 0)
728 inode->i_gid = attr->ia_gid;
6a97d02d 729 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 730 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 731 else
732 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
733 | NFS_INO_INVALID_CTIME);
6edf9609
TM		 734 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
735 | NFS_INO_INVALID_ACL);
65e4308d 736 }
6a97d02d
TM		 737 if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
738 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
739 | NFS_INO_INVALID_CTIME);
740 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 741 inode->i_atime = fattr->atime;
6a97d02d
TM		 742 else if (attr->ia_valid & ATTR_ATIME_SET)
743 inode->i_atime = attr->ia_atime;
744 else
745 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
746
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);
752 }
753 if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
754 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
755 | NFS_INO_INVALID_CTIME);
756 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 757 inode->i_mtime = fattr->mtime;
6a97d02d
TM		 758 else if (attr->ia_valid & ATTR_MTIME_SET)
759 inode->i_mtime = attr->ia_mtime;
760 else
761 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
762
763 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 764 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 765 else
766 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
767 | NFS_INO_INVALID_CTIME);
65e4308d 768 }
616c3196
JL		 769 if (fattr->valid)
770 nfs_update_inode(inode, fattr);
f044636d 771 spin_unlock(&inode->i_lock);
1da177e4 772}
ddda8e0a 773EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
1da177e4 774
1bcf4c5c 775static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
311324ad
TM		 776{
777 struct dentry *parent;
778
1bcf4c5c
TM		 779 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
780 return;
311324ad 781 parent = dget_parent(dentry);
2b0143b5 782 nfs_force_use_readdirplus(d_inode(parent));
311324ad
TM		 783 dput(parent);
784}
785
1bcf4c5c
TM		 786static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
787{
788 struct dentry *parent;
789
790 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
791 return;
792 parent = dget_parent(dentry);
793 nfs_advise_use_readdirplus(d_inode(parent));
794 dput(parent);
795}
796
63cdd7ed 797static u32 nfs_get_valid_attrmask(struct inode *inode)
311324ad 798{
63cdd7ed
TM		 799 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
800 u32 reply_mask = STATX_INO | STATX_TYPE;
801
802 if (!(cache_validity & NFS_INO_INVALID_ATIME))
803 reply_mask |= STATX_ATIME;
13c0b082
TM		 804 if (!(cache_validity & NFS_INO_INVALID_CTIME))
805 reply_mask |= STATX_CTIME;
806 if (!(cache_validity & NFS_INO_INVALID_MTIME))
807 reply_mask |= STATX_MTIME;
808 if (!(cache_validity & NFS_INO_INVALID_SIZE))
809 reply_mask |= STATX_SIZE;
fabf2b34
TM		 810 if (!(cache_validity & NFS_INO_INVALID_NLINK))
811 reply_mask |= STATX_NLINK;
720869eb
TM		 812 if (!(cache_validity & NFS_INO_INVALID_MODE))
813 reply_mask |= STATX_MODE;
63cdd7ed 814 if (!(cache_validity & NFS_INO_INVALID_OTHER))
720869eb 815 reply_mask |= STATX_UID | STATX_GID;
63cdd7ed
TM		 816 if (!(cache_validity & NFS_INO_INVALID_BLOCKS))
817 reply_mask |= STATX_BLOCKS;
818 return reply_mask;
311324ad
TM		 819}
820
549c7297
CB		 821int nfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
822 struct kstat *stat, u32 request_mask, unsigned int query_flags)
1da177e4 823{
a528d35e 824 struct inode *inode = d_inode(path->dentry);
9ccee940
TM		 825 struct nfs_server *server = NFS_SERVER(inode);
826 unsigned long cache_validity;
16caf5b6 827 int err = 0;
9ccee940
TM		 828 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
829 bool do_update = false;
1da177e4 830
f4ce1299 831 trace_nfs_getattr_enter(inode);
9ccee940 832
4eb6a823
TM		 833 request_mask &= STATX_TYPE | STATX_MODE | STATX_NLINK | STATX_UID |
834 STATX_GID | STATX_ATIME | STATX_MTIME | STATX_CTIME |
835 STATX_INO | STATX_SIZE | STATX_BLOCKS;
836
ac7cbb22
TM		 837 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
838 nfs_readdirplus_parent_cache_hit(path->dentry);
63cdd7ed 839 goto out_no_revalidate;
ac7cbb22 840 }
9ccee940 841
acdc53b2 842 /* Flush out writes to the server in order to update c/mtime. */
9ccee940
TM		 843 if ((request_mask & (STATX_CTIME|STATX_MTIME)) &&
844 S_ISREG(inode->i_mode)) {
79566ef0 845 err = filemap_write_and_wait(inode->i_mapping);
acdc53b2
TM		 846 if (err)
847 goto out;
28c494c5 848 }
fc33a7bb
CH		 849
850 /*
851 * We may force a getattr if the user cares about atime.
852 *
853 * Note that we only have to check the vfsmount flags here:
854 * - NFS always sets S_NOATIME by so checking it would give a
855 * bogus result
1751e8a6 856 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
fc33a7bb
CH		 857 * no point in checking those.
858 */
a528d35e
DH		 859 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
860 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
9ccee940
TM		 861 request_mask &= ~STATX_ATIME;
862
863 /* Is the user requesting attributes that might need revalidation? */
864 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
865 STATX_MTIME|STATX_UID|STATX_GID|
866 STATX_SIZE|STATX_BLOCKS)))
867 goto out_no_revalidate;
868
869 /* Check whether the cached attributes are stale */
870 do_update |= force_sync || nfs_attribute_cache_expired(inode);
871 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
e8764a6f 872 do_update |= cache_validity & NFS_INO_INVALID_CHANGE;
9ccee940
TM		 873 if (request_mask & STATX_ATIME)
874 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
e8764a6f
TM		 875 if (request_mask & STATX_CTIME)
876 do_update |= cache_validity & NFS_INO_INVALID_CTIME;
877 if (request_mask & STATX_MTIME)
878 do_update |= cache_validity & NFS_INO_INVALID_MTIME;
879 if (request_mask & STATX_SIZE)
880 do_update |= cache_validity & NFS_INO_INVALID_SIZE;
fabf2b34
TM		 881 if (request_mask & STATX_NLINK)
882 do_update |= cache_validity & NFS_INO_INVALID_NLINK;
720869eb
TM		 883 if (request_mask & STATX_MODE)
884 do_update |= cache_validity & NFS_INO_INVALID_MODE;
885 if (request_mask & (STATX_UID | STATX_GID))
e8764a6f 886 do_update |= cache_validity & NFS_INO_INVALID_OTHER;
3a39e778
ZB		 887 if (request_mask & STATX_BLOCKS)
888 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
63cdd7ed 889
9ccee940
TM		 890 if (do_update) {
891 /* Update the attribute cache */
59b86d85
HT		 892 if (!(server->flags & NFS_MOUNT_NOAC))
893 nfs_readdirplus_parent_cache_miss(path->dentry);
894 else
895 nfs_readdirplus_parent_cache_hit(path->dentry);
311324ad 896 err = __nfs_revalidate_inode(server, inode);
9ccee940
TM		 897 if (err)
898 goto out;
1bcf4c5c 899 } else
a528d35e 900 nfs_readdirplus_parent_cache_hit(path->dentry);
9ccee940
TM		 901out_no_revalidate:
902 /* Only return attributes that were revalidated. */
63cdd7ed
TM		 903 stat->result_mask = nfs_get_valid_attrmask(inode) | request_mask;
904
0d56a451 905 generic_fillattr(&init_user_ns, inode, stat);
9ccee940
TM		 906 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
907 if (S_ISDIR(inode->i_mode))
908 stat->blksize = NFS_SERVER(inode)->dtsize;
acdc53b2 909out:
f4ce1299 910 trace_nfs_getattr_exit(inode, err);
1da177e4
LT		 911 return err;
912}
ddda8e0a 913EXPORT_SYMBOL_GPL(nfs_getattr);
1da177e4 914
f11ac8db
TM		 915static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
916{
2f62b5aa 917 refcount_set(&l_ctx->count, 1);
d51fdb87 918 l_ctx->lockowner = current->files;
f11ac8db 919 INIT_LIST_HEAD(&l_ctx->list);
210c7c17 920 atomic_set(&l_ctx->io_count, 0);
f11ac8db
TM		 921}
922
923static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
924{
1db97eaa 925 struct nfs_lock_context *pos;
f11ac8db 926
1db97eaa 927 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
d51fdb87 928 if (pos->lockowner != current->files)
f11ac8db 929 continue;
1db97eaa
TM		 930 if (refcount_inc_not_zero(&pos->count))
931 return pos;
932 }
f11ac8db
TM		 933 return NULL;
934}
935
936struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
937{
938 struct nfs_lock_context *res, *new = NULL;
2b0143b5 939 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 940
1db97eaa 941 rcu_read_lock();
f11ac8db 942 res = __nfs_find_lock_context(ctx);
1db97eaa 943 rcu_read_unlock();
f11ac8db 944 if (res == NULL) {
f11ac8db
TM		 945 new = kmalloc(sizeof(*new), GFP_KERNEL);
946 if (new == NULL)
b3c54de6 947 return ERR_PTR(-ENOMEM);
f11ac8db
TM		 948 nfs_init_lock_context(new);
949 spin_lock(&inode->i_lock);
950 res = __nfs_find_lock_context(ctx);
951 if (res == NULL) {
15494511
TM		 952 new->open_context = get_nfs_open_context(ctx);
953 if (new->open_context) {
954 list_add_tail_rcu(&new->list,
955 &ctx->lock_context.list);
956 res = new;
957 new = NULL;
958 } else
959 res = ERR_PTR(-EBADF);
f11ac8db 960 }
1db97eaa
TM		 961 spin_unlock(&inode->i_lock);
962 kfree(new);
f11ac8db 963 }
f11ac8db
TM		 964 return res;
965}
1c6dcbe5 966EXPORT_SYMBOL_GPL(nfs_get_lock_context);
f11ac8db
TM		 967
968void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
969{
970 struct nfs_open_context *ctx = l_ctx->open_context;
2b0143b5 971 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 972
2f62b5aa 973 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
f11ac8db 974 return;
1db97eaa 975 list_del_rcu(&l_ctx->list);
f11ac8db 976 spin_unlock(&inode->i_lock);
15494511 977 put_nfs_open_context(ctx);
1db97eaa 978 kfree_rcu(l_ctx, rcu_head);
f11ac8db 979}
1c6dcbe5 980EXPORT_SYMBOL_GPL(nfs_put_lock_context);
f11ac8db 981
7fe5c398
TM		 982/**
983 * nfs_close_context - Common close_context() routine NFSv2/v3
984 * @ctx: pointer to context
985 * @is_sync: is this a synchronous close
986 *
5cf9d706
TM		 987 * Ensure that the attributes are up to date if we're mounted
988 * with close-to-open semantics and we have cached data that will
989 * need to be revalidated on open.
7fe5c398
TM		 990 */
991void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
992{
5cf9d706 993 struct nfs_inode *nfsi;
7fe5c398 994 struct inode *inode;
7fe5c398
TM		 995
996 if (!(ctx->mode & FMODE_WRITE))
997 return;
998 if (!is_sync)
999 return;
2b0143b5 1000 inode = d_inode(ctx->dentry);
58ff4184
TM		 1001 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1002 return;
5cf9d706
TM		 1003 nfsi = NFS_I(inode);
1004 if (inode->i_mapping->nrpages == 0)
1005 return;
1006 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1007 return;
1008 if (!list_empty(&nfsi->open_files))
7fe5c398 1009 return;
1f3208b2 1010 if (NFS_SERVER(inode)->flags & NFS_MOUNT_NOCTO)
7fe5c398 1011 return;
1f3208b2
TM		 1012 nfs_revalidate_inode(inode,
1013 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
7fe5c398 1014}
ddda8e0a 1015EXPORT_SYMBOL_GPL(nfs_close_context);
7fe5c398 1016
532d4def
N		 1017struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
1018 fmode_t f_mode,
1019 struct file *filp)
1da177e4
LT		 1020{
1021 struct nfs_open_context *ctx;
1022
f52720ca 1023 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
1d179d6b 1024 if (!ctx)
5ede7b1c 1025 return ERR_PTR(-ENOMEM);
5ede7b1c
AV		 1026 nfs_sb_active(dentry->d_sb);
1027 ctx->dentry = dget(dentry);
1d179d6b
TM		 1028 if (filp)
1029 ctx->cred = get_cred(filp->f_cred);
1030 else
1031 ctx->cred = get_current_cred();
ddf529ee 1032 ctx->ll_cred = NULL;
5ede7b1c
AV		 1033 ctx->state = NULL;
1034 ctx->mode = f_mode;
1035 ctx->flags = 0;
1036 ctx->error = 0;
532d4def 1037 ctx->flock_owner = (fl_owner_t)filp;
5ede7b1c
AV		 1038 nfs_init_lock_context(&ctx->lock_context);
1039 ctx->lock_context.open_context = ctx;
1040 INIT_LIST_HEAD(&ctx->list);
82be417a 1041 ctx->mdsthreshold = NULL;
1da177e4
LT		 1042 return ctx;
1043}
89d77c8f 1044EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
1da177e4
LT		 1045
1046struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1047{
0de43976
TM		 1048 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
1049 return ctx;
1050 return NULL;
1da177e4 1051}
89d77c8f 1052EXPORT_SYMBOL_GPL(get_nfs_open_context);
1da177e4 1053
7fe5c398 1054static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
1da177e4 1055{
2b0143b5 1056 struct inode *inode = d_inode(ctx->dentry);
3d4ff43d 1057 struct super_block *sb = ctx->dentry->d_sb;
3bec63db 1058
0de43976
TM		 1059 if (!refcount_dec_and_test(&ctx->lock_context.count))
1060 return;
5c78f58e 1061 if (!list_empty(&ctx->list)) {
0de43976
TM		 1062 spin_lock(&inode->i_lock);
1063 list_del_rcu(&ctx->list);
ef84303e 1064 spin_unlock(&inode->i_lock);
0de43976 1065 }
5c78f58e
TM		 1066 if (inode != NULL)
1067 NFS_PROTO(inode)->close_context(ctx, is_sync);
a52458b4 1068 put_cred(ctx->cred);
3d4ff43d 1069 dput(ctx->dentry);
322b2b90 1070 nfs_sb_deactive(sb);
ddf529ee 1071 put_rpccred(ctx->ll_cred);
82be417a 1072 kfree(ctx->mdsthreshold);
0de43976 1073 kfree_rcu(ctx, rcu_head);
3bec63db
TM		 1074}
1075
a49c3c77
TM		 1076void put_nfs_open_context(struct nfs_open_context *ctx)
1077{
1078 __put_nfs_open_context(ctx, 0);
1079}
89d77c8f 1080EXPORT_SYMBOL_GPL(put_nfs_open_context);
a49c3c77 1081
4eae5014
TM		 1082static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1083{
1084 __put_nfs_open_context(ctx, 1);
1085}
1086
1da177e4
LT		 1087/*
1088 * Ensure that mmap has a recent RPC credential for use when writing out
1089 * shared pages
1090 */
c45ffdd2 1091void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1da177e4 1092{
2b0143b5 1093 struct inode *inode = d_inode(ctx->dentry);
1da177e4
LT		 1094 struct nfs_inode *nfsi = NFS_I(inode);
1095
1da177e4 1096 spin_lock(&inode->i_lock);
1c341b77
TM		 1097 if (list_empty(&nfsi->open_files) &&
1098 (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER))
ac46b3d7
TM		 1099 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA |
1100 NFS_INO_REVAL_FORCED);
0de43976 1101 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1da177e4
LT		 1102 spin_unlock(&inode->i_lock);
1103}
c45ffdd2
TM		 1104EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1105
1106void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1107{
1108 filp->private_data = get_nfs_open_context(ctx);
e97bc663 1109 set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
c45ffdd2
TM		 1110 if (list_empty(&ctx->list))
1111 nfs_inode_attach_open_context(ctx);
1112}
89d77c8f 1113EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1da177e4 1114
d530838b
TM		 1115/*
1116 * Given an inode, search for an open context with the desired characteristics
1117 */
a52458b4 1118struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1da177e4
LT		 1119{
1120 struct nfs_inode *nfsi = NFS_I(inode);
1121 struct nfs_open_context *pos, *ctx = NULL;
1122
0de43976
TM		 1123 rcu_read_lock();
1124 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
65f51603 1125 if (cred != NULL && cred_fscmp(pos->cred, cred) != 0)
d530838b 1126 continue;
1544fa0f
TM		 1127 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1128 continue;
e97bc663
TM		 1129 if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags))
1130 continue;
1544fa0f 1131 ctx = get_nfs_open_context(pos);
0de43976
TM		 1132 if (ctx)
1133 break;
1da177e4 1134 }
0de43976 1135 rcu_read_unlock();
1da177e4
LT		 1136 return ctx;
1137}
1138
aff8d8dc 1139void nfs_file_clear_open_context(struct file *filp)
1da177e4 1140{
cd3758e3 1141 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1da177e4
LT		 1142
1143 if (ctx) {
2b0143b5 1144 struct inode *inode = d_inode(ctx->dentry);
c45ffdd2 1145
e97bc663 1146 clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
0bcbf039
PT		 1147 /*
1148 * We fatal error on write before. Try to writeback
1149 * every page again.
1150 */
1151 if (ctx->error < 0)
1152 invalidate_inode_pages2(inode->i_mapping);
1da177e4 1153 filp->private_data = NULL;
4eae5014 1154 put_nfs_open_context_sync(ctx);
1da177e4
LT		 1155 }
1156}
1157
1158/*
1159 * These allocate and release file read/write context information.
1160 */
1161int nfs_open(struct inode *inode, struct file *filp)
1162{
1163 struct nfs_open_context *ctx;
1da177e4 1164
532d4def 1165 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
5ede7b1c
AV		 1166 if (IS_ERR(ctx))
1167 return PTR_ERR(ctx);
1da177e4
LT		 1168 nfs_file_set_open_context(filp, ctx);
1169 put_nfs_open_context(ctx);
f1fe29b4 1170 nfs_fscache_open_file(inode, filp);
1da177e4
LT		 1171 return 0;
1172}
44942b4e 1173EXPORT_SYMBOL_GPL(nfs_open);
1da177e4 1174
1da177e4
LT		 1175/*
1176 * This function is called whenever some part of NFS notices that
1177 * the cached attributes have to be refreshed.
1178 */
1179int
1180__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1181{
1182 int status = -ESTALE;
1775fd3e 1183 struct nfs4_label *label = NULL;
a3cba2aa 1184 struct nfs_fattr *fattr = NULL;
1da177e4 1185 struct nfs_inode *nfsi = NFS_I(inode);
1da177e4 1186
1e8968c5
NV		 1187 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1188 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1da177e4 1189
f4ce1299
TM		 1190 trace_nfs_revalidate_inode_enter(inode);
1191
85233a7a 1192 if (is_bad_inode(inode))
691beb13 1193 goto out;
1da177e4 1194 if (NFS_STALE(inode))
412d582e 1195 goto out;
7fdc49c4 1196
ac46bd37
TM		 1197 /* pNFS: Attributes aren't updated until we layoutcommit */
1198 if (S_ISREG(inode->i_mode)) {
1199 status = pnfs_sync_inode(inode, false);
1200 if (status)
1201 goto out;
1202 }
1203
a3cba2aa
TM		 1204 status = -ENOMEM;
1205 fattr = nfs_alloc_fattr();
1206 if (fattr == NULL)
1207 goto out;
1208
691beb13 1209 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
14c43f76
DQ		 1210
1211 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1212 if (IS_ERR(label)) {
1213 status = PTR_ERR(label);
1214 goto out;
1215 }
1216
a841b54d
TM		 1217 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr,
1218 label, inode);
1da177e4 1219 if (status != 0) {
1e8968c5 1220 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1da177e4 1221 inode->i_sb->s_id,
1e8968c5 1222 (unsigned long long)NFS_FILEID(inode), status);
c74dfe97
TM		 1223 switch (status) {
1224 case -ETIMEDOUT:
1225 /* A soft timeout occurred. Use cached information? */
1226 if (server->flags & NFS_MOUNT_SOFTREVAL)
1227 status = 0;
1228 break;
1229 case -ESTALE:
1da177e4 1230 if (!S_ISDIR(inode->i_mode))
93ce4af7
TM		 1231 nfs_set_inode_stale(inode);
1232 else
1233 nfs_zap_caches(inode);
1da177e4 1234 }
14c43f76 1235 goto err_out;
1da177e4
LT		 1236 }
1237
a3cba2aa 1238 status = nfs_refresh_inode(inode, fattr);
1da177e4 1239 if (status) {
1e8968c5 1240 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1da177e4 1241 inode->i_sb->s_id,
1e8968c5 1242 (unsigned long long)NFS_FILEID(inode), status);
14c43f76 1243 goto err_out;
1da177e4 1244 }
55296809 1245
24aa1fe6 1246 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
ada70d94 1247 nfs_zap_acl_cache(inode);
55296809 1248
3da580aa
JL		 1249 nfs_setsecurity(inode, fattr, label);
1250
1e8968c5 1251 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1da177e4 1252 inode->i_sb->s_id,
1e8968c5 1253 (unsigned long long)NFS_FILEID(inode));
1da177e4 1254
14c43f76
DQ		 1255err_out:
1256 nfs4_label_free(label);
1257out:
a3cba2aa 1258 nfs_free_fattr(fattr);
f4ce1299 1259 trace_nfs_revalidate_inode_exit(inode, status);
1da177e4
LT		 1260 return status;
1261}
1262
43f291cd 1263int nfs_attribute_cache_expired(struct inode *inode)
d7cf8dd0 1264{
b4d2314b 1265 if (nfs_have_delegated_attributes(inode))
1da177e4 1266 return 0;
d7cf8dd0 1267 return nfs_attribute_timeout(inode);
1da177e4
LT		 1268}
1269
1270/**
1271 * nfs_revalidate_inode - Revalidate the inode attributes
302fad7b 1272 * @inode: pointer to inode struct
1f3208b2 1273 * @flags: cache flags to check
1da177e4
LT		 1274 *
1275 * Updates inode attribute information by retrieving the data from the server.
1276 */
1f3208b2 1277int nfs_revalidate_inode(struct inode *inode, unsigned long flags)
1da177e4 1278{
1f3208b2 1279 if (!nfs_check_cache_invalid(inode, flags))
1da177e4 1280 return NFS_STALE(inode) ? -ESTALE : 0;
1f3208b2 1281 return __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1da177e4 1282}
1c606fb7 1283EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1da177e4 1284
1cda707d 1285static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
717d44e8 1286{
f8806c84
TM		 1287 int ret;
1288
717d44e8 1289 if (mapping->nrpages != 0) {
f8806c84
TM		 1290 if (S_ISREG(inode->i_mode)) {
1291 ret = nfs_sync_mapping(mapping);
1292 if (ret < 0)
1293 return ret;
1294 }
1295 ret = invalidate_inode_pages2(mapping);
717d44e8
TM		 1296 if (ret < 0)
1297 return ret;
1298 }
717d44e8 1299 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
de242c0b 1300 nfs_fscache_wait_on_invalidate(inode);
f4ce1299 1301
1e8968c5
NV		 1302 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1303 inode->i_sb->s_id,
1304 (unsigned long long)NFS_FILEID(inode));
717d44e8
TM		 1305 return 0;
1306}
1307
717d44e8 1308/**
28aa2f9e 1309 * nfs_clear_invalid_mapping - Conditionally clear a mapping
302fad7b 1310 * @mapping: pointer to mapping
28aa2f9e
TM		 1311 *
1312 * If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping.
717d44e8 1313 */
28aa2f9e 1314int nfs_clear_invalid_mapping(struct address_space *mapping)
717d44e8 1315{
28aa2f9e 1316 struct inode *inode = mapping->host;
717d44e8 1317 struct nfs_inode *nfsi = NFS_I(inode);
d529ef83 1318 unsigned long *bitlock = &nfsi->flags;
717d44e8 1319 int ret = 0;
dc59250c 1320
d529ef83
JL		 1321 /*
1322 * We must clear NFS_INO_INVALID_DATA first to ensure that
1323 * invalidations that come in while we're shooting down the mappings
1324 * are respected. But, that leaves a race window where one revalidator
1325 * can clear the flag, and then another checks it before the mapping
1326 * gets invalidated. Fix that by serializing access to this part of
1327 * the function.
1328 *
1329 * At the same time, we need to allow other tasks to see whether we
1330 * might be in the middle of invalidating the pages, so we only set
1331 * the bit lock here if it looks like we're going to be doing that.
1332 */
1333 for (;;) {
74316201
N		 1334 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1335 nfs_wait_bit_killable, TASK_KILLABLE);
d529ef83
JL		 1336 if (ret)
1337 goto out;
17dfeb91
TM		 1338 spin_lock(&inode->i_lock);
1339 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1340 spin_unlock(&inode->i_lock);
1341 continue;
1342 }
1343 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
d529ef83 1344 break;
d529ef83 1345 spin_unlock(&inode->i_lock);
17dfeb91 1346 goto out;
f4ce1299
TM		 1347 }
1348
17dfeb91 1349 set_bit(NFS_INO_INVALIDATING, bitlock);
4db72b40 1350 smp_wmb();
28aa2f9e
TM		 1351 nfsi->cache_validity &=
1352 ~(NFS_INO_INVALID_DATA | NFS_INO_DATA_INVAL_DEFER);
17dfeb91
TM		 1353 spin_unlock(&inode->i_lock);
1354 trace_nfs_invalidate_mapping_enter(inode);
be527494 1355 ret = nfs_invalidate_mapping(inode, mapping);
17dfeb91
TM		 1356 trace_nfs_invalidate_mapping_exit(inode, ret);
1357
d529ef83 1358 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
4e857c58 1359 smp_mb__after_atomic();
d529ef83 1360 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
cd9ae2b6 1361out:
44b11874 1362 return ret;
7d52e862
TM		 1363}
1364
28aa2f9e
TM		 1365bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1366{
13c0b082 1367 return nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE) ||
28aa2f9e
TM		 1368 NFS_STALE(inode);
1369}
1370
1371int nfs_revalidate_mapping_rcu(struct inode *inode)
1372{
1373 struct nfs_inode *nfsi = NFS_I(inode);
1374 unsigned long *bitlock = &nfsi->flags;
1375 int ret = 0;
1376
1377 if (IS_SWAPFILE(inode))
1378 goto out;
1379 if (nfs_mapping_need_revalidate_inode(inode)) {
1380 ret = -ECHILD;
1381 goto out;
1382 }
1383 spin_lock(&inode->i_lock);
1384 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1385 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1386 ret = -ECHILD;
1387 spin_unlock(&inode->i_lock);
1388out:
1389 return ret;
1390}
1391
1392/**
1393 * nfs_revalidate_mapping - Revalidate the pagecache
1394 * @inode: pointer to host inode
1395 * @mapping: pointer to mapping
1396 */
1397int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1398{
1399 /* swapfiles are not supposed to be shared. */
1400 if (IS_SWAPFILE(inode))
1401 return 0;
1402
1403 if (nfs_mapping_need_revalidate_inode(inode)) {
1404 int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1405 if (ret < 0)
1406 return ret;
1407 }
1408
1409 return nfs_clear_invalid_mapping(mapping);
1410}
1411
ca0daa27 1412static bool nfs_file_has_writers(struct nfs_inode *nfsi)
874f9463 1413{
ca0daa27
TM		 1414 struct inode *inode = &nfsi->vfs_inode;
1415
ca0daa27
TM		 1416 if (!S_ISREG(inode->i_mode))
1417 return false;
1418 if (list_empty(&nfsi->open_files))
1419 return false;
6ba0c4e5 1420 return inode_is_open_for_write(inode);
874f9463
TM		 1421}
1422
651b0e70 1423static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
874f9463 1424{
651b0e70 1425 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
874f9463
TM		 1426}
1427
783b194c 1428static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
a895b4a1 1429{
e86d5a02 1430 struct timespec64 ts;
95582b00 1431
9e6e70f8
TM		 1432 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1433 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
c472c07b 1434 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1eb5d98f 1435 inode_set_iversion_raw(inode, fattr->change_attr);
70ca8852 1436 if (S_ISDIR(inode->i_mode))
6edf9609 1437 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
0f44da51
FL		 1438 else if (nfs_server_capable(inode, NFS_CAP_XATTR))
1439 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
70ca8852 1440 }
a895b4a1 1441 /* If we have atomic WCC data, we may update some attributes */
e86d5a02 1442 ts = inode->i_ctime;
9e6e70f8
TM		 1443 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1444 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02
TM		 1445 && timespec64_equal(&ts, &fattr->pre_ctime)) {
1446 inode->i_ctime = fattr->ctime;
27dc1cd3 1447 }
9e6e70f8 1448
e86d5a02 1449 ts = inode->i_mtime;
9e6e70f8
TM		 1450 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1451 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02
TM		 1452 && timespec64_equal(&ts, &fattr->pre_mtime)) {
1453 inode->i_mtime = fattr->mtime;
27dc1cd3 1454 if (S_ISDIR(inode->i_mode))
6edf9609 1455 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
a895b4a1 1456 }
9e6e70f8
TM		 1457 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1458 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1459 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
a6b6d5b8 1460 && !nfs_have_writebacks(inode)) {
27dc1cd3 1461 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
27dc1cd3 1462 }
a895b4a1
TM		 1463}
1464
1da177e4 1465/**
33801147 1466 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
302fad7b
TM		 1467 * @inode: pointer to inode
1468 * @fattr: updated attributes
1da177e4
LT		 1469 *
1470 * Verifies the attribute cache. If we have just changed the attributes,
1471 * so that fattr carries weak cache consistency data, then it may
1472 * also update the ctime/mtime/change_attribute.
1473 */
33801147 1474static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1da177e4
LT		 1475{
1476 struct nfs_inode *nfsi = NFS_I(inode);
1477 loff_t cur_size, new_isize;
2a3f5fd4 1478 unsigned long invalid = 0;
e86d5a02 1479 struct timespec64 ts;
dc59250c 1480
4ebe83af 1481 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
01da47bd 1482 return 0;
4ebe83af 1483
eb3d8f42
TM		 1484 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1485 /* Only a mounted-on-fileid? Just exit */
1486 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1487 return 0;
ca62b9c3 1488 /* Has the inode gone and changed behind our back? */
eb3d8f42 1489 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 1490 /* Is this perhaps the mounted-on fileid? */
1491 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1492 nfsi->fileid == fattr->mounted_on_fileid)
1493 return 0;
cc89684c 1494 return -ESTALE;
7e10cc25 1495 }
6e3e2c43 1496 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode))
cc89684c 1497 return -ESTALE;
ca62b9c3 1498
7e10cc25 1499
651b0e70 1500 if (!nfs_file_has_buffered_writers(nfsi)) {
ca0daa27 1501 /* Verify a few of the more important attributes */
c472c07b 1502 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
04c63498 1503 invalid |= NFS_INO_INVALID_CHANGE;
1da177e4 1504
e86d5a02
TM		 1505 ts = inode->i_mtime;
1506 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
16e14375 1507 invalid |= NFS_INO_INVALID_MTIME;
ca62b9c3 1508
e86d5a02
TM		 1509 ts = inode->i_ctime;
1510 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
16e14375 1511 invalid |= NFS_INO_INVALID_CTIME;
ca0daa27
TM		 1512
1513 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1514 cur_size = i_size_read(inode);
1515 new_isize = nfs_size_to_loff_t(fattr->size);
1516 if (cur_size != new_isize)
04c63498 1517 invalid |= NFS_INO_INVALID_SIZE;
ca0daa27 1518 }
9e6e70f8 1519 }
1da177e4
LT		 1520
1521 /* Have any file permissions changed? */
9e6e70f8 1522 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
04c63498 1523 invalid |= NFS_INO_INVALID_MODE;
9ff593c4 1524 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
04c63498 1525 invalid |= NFS_INO_INVALID_OTHER;
9ff593c4 1526 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
04c63498 1527 invalid |= NFS_INO_INVALID_OTHER;
1da177e4
LT		 1528
1529 /* Has the link count changed? */
9e6e70f8 1530 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
fabf2b34 1531 invalid |= NFS_INO_INVALID_NLINK;
1da177e4 1532
e86d5a02
TM		 1533 ts = inode->i_atime;
1534 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
2a3f5fd4
TM		 1535 invalid |= NFS_INO_INVALID_ATIME;
1536
1537 if (invalid != 0)
4ebe83af 1538 nfs_set_cache_invalid(inode, invalid);
1da177e4 1539
33801147 1540 nfsi->read_cache_jiffies = fattr->time_start;
1da177e4
LT		 1541 return 0;
1542}
1543
ae05f269 1544static atomic_long_t nfs_attr_generation_counter;
4704f0e2
TM		 1545
1546static unsigned long nfs_read_attr_generation_counter(void)
1547{
ae05f269 1548 return atomic_long_read(&nfs_attr_generation_counter);
4704f0e2
TM		 1549}
1550
1551unsigned long nfs_inc_attr_generation_counter(void)
1552{
ae05f269 1553 return atomic_long_inc_return(&nfs_attr_generation_counter);
4704f0e2 1554}
3235b403 1555EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
4704f0e2
TM		 1556
1557void nfs_fattr_init(struct nfs_fattr *fattr)
1558{
1559 fattr->valid = 0;
1560 fattr->time_start = jiffies;
1561 fattr->gencount = nfs_inc_attr_generation_counter();
6926afd1
TM		 1562 fattr->owner_name = NULL;
1563 fattr->group_name = NULL;
4704f0e2 1564}
ddda8e0a 1565EXPORT_SYMBOL_GPL(nfs_fattr_init);
4704f0e2 1566
140e049c
TM		 1567/**
1568 * nfs_fattr_set_barrier
1569 * @fattr: attributes
1570 *
1571 * Used to set a barrier after an attribute was updated. This
1572 * barrier ensures that older attributes from RPC calls that may
1573 * have raced with our update cannot clobber these new values.
1574 * Note that you are still responsible for ensuring that other
1575 * operations which change the attribute on the server do not
1576 * collide.
1577 */
1578void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1579{
1580 fattr->gencount = nfs_inc_attr_generation_counter();
1581}
1582
2d36bfde
TM		 1583struct nfs_fattr *nfs_alloc_fattr(void)
1584{
1585 struct nfs_fattr *fattr;
1586
1587 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1588 if (fattr != NULL)
1589 nfs_fattr_init(fattr);
1590 return fattr;
1591}
ddda8e0a 1592EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
2d36bfde
TM		 1593
1594struct nfs_fh *nfs_alloc_fhandle(void)
1595{
1596 struct nfs_fh *fh;
1597
1598 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1599 if (fh != NULL)
1600 fh->size = 0;
1601 return fh;
1602}
ddda8e0a 1603EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
2d36bfde 1604
e27d359e 1605#ifdef NFS_DEBUG
d8e0539e
WAA		 1606/*
1607 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1608 * in the same way that wireshark does
1609 *
1610 * @fh: file handle
1611 *
1612 * For debugging only.
1613 */
1614u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1615{
1616 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1617 * not on the result */
1264a2f0 1618 return nfs_fhandle_hash(fh);
d8e0539e 1619}
9e6ee76d 1620EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
d8e0539e
WAA		 1621
1622/*
20d27e92
CL		 1623 * _nfs_display_fhandle - display an NFS file handle on the console
1624 *
1625 * @fh: file handle to display
1626 * @caption: display caption
1627 *
1628 * For debugging only.
1629 */
20d27e92
CL		 1630void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1631{
1632 unsigned short i;
1633
fa68a1ba 1634 if (fh == NULL || fh->size == 0) {
20d27e92
CL		 1635 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1636 return;
1637 }
1638
d8e0539e
WAA		 1639 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1640 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
20d27e92
CL		 1641 for (i = 0; i < fh->size; i += 16) {
1642 __be32 *pos = (__be32 *)&fh->data[i];
1643
1644 switch ((fh->size - i - 1) >> 2) {
1645 case 0:
1646 printk(KERN_DEFAULT " %08x\n",
1647 be32_to_cpup(pos));
1648 break;
1649 case 1:
1650 printk(KERN_DEFAULT " %08x %08x\n",
1651 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1652 break;
1653 case 2:
1654 printk(KERN_DEFAULT " %08x %08x %08x\n",
1655 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1656 be32_to_cpup(pos + 2));
1657 break;
1658 default:
1659 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1660 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1661 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1662 }
1663 }
1664}
9e6ee76d 1665EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
20d27e92
CL		 1666#endif
1667
a10ad176 1668/**
6f9be83d 1669 * nfs_inode_attrs_cmp_generic - compare attributes
302fad7b 1670 * @fattr: attributes
302fad7b 1671 * @inode: pointer to inode
a10ad176
TM		 1672 *
1673 * Attempt to divine whether or not an RPC call reply carrying stale
1674 * attributes got scheduled after another call carrying updated ones.
4704f0e2 1675 * Note also the check for wraparound of 'attr_gencount'
a10ad176 1676 *
6f9be83d
TM		 1677 * The function returns '1' if it thinks the attributes in @fattr are
1678 * more recent than the ones cached in @inode. Otherwise it returns
1679 * the value '0'.
a10ad176 1680 */
6f9be83d
TM		 1681static int nfs_inode_attrs_cmp_generic(const struct nfs_fattr *fattr,
1682 const struct inode *inode)
a10ad176 1683{
9fdbfad1 1684 unsigned long attr_gencount = NFS_I(inode)->attr_gencount;
a10ad176 1685
9fdbfad1
TM		 1686 return (long)(fattr->gencount - attr_gencount) > 0 ||
1687 (long)(attr_gencount - nfs_read_attr_generation_counter()) > 0;
a10ad176
TM		 1688}
1689
6f9be83d
TM		 1690/**
1691 * nfs_inode_attrs_cmp_monotonic - compare attributes
302fad7b 1692 * @fattr: attributes
6f9be83d 1693 * @inode: pointer to inode
a10ad176
TM		 1694 *
1695 * Attempt to divine whether or not an RPC call reply carrying stale
1696 * attributes got scheduled after another call carrying updated ones.
1697 *
6f9be83d
TM		 1698 * We assume that the server observes monotonic semantics for
1699 * the change attribute, so a larger value means that the attributes in
1700 * @fattr are more recent, in which case the function returns the
1701 * value '1'.
1702 * A return value of '0' indicates no measurable change
1703 * A return value of '-1' means that the attributes in @inode are
1704 * more recent.
1705 */
1706static int nfs_inode_attrs_cmp_monotonic(const struct nfs_fattr *fattr,
1707 const struct inode *inode)
a10ad176 1708{
6f9be83d
TM		 1709 s64 diff = fattr->change_attr - inode_peek_iversion_raw(inode);
1710 if (diff > 0)
1711 return 1;
1712 return diff == 0 ? 0 : -1;
1713}
1714
1715/**
1716 * nfs_inode_attrs_cmp_strict_monotonic - compare attributes
1717 * @fattr: attributes
1718 * @inode: pointer to inode
a10ad176 1719 *
6f9be83d
TM		 1720 * Attempt to divine whether or not an RPC call reply carrying stale
1721 * attributes got scheduled after another call carrying updated ones.
a10ad176 1722 *
6f9be83d
TM		 1723 * We assume that the server observes strictly monotonic semantics for
1724 * the change attribute, so a larger value means that the attributes in
1725 * @fattr are more recent, in which case the function returns the
1726 * value '1'.
1727 * A return value of '-1' means that the attributes in @inode are
1728 * more recent or unchanged.
a10ad176 1729 */
6f9be83d
TM		 1730static int nfs_inode_attrs_cmp_strict_monotonic(const struct nfs_fattr *fattr,
1731 const struct inode *inode)
a10ad176 1732{
6f9be83d
TM		 1733 return nfs_inode_attrs_cmp_monotonic(fattr, inode) > 0 ? 1 : -1;
1734}
a10ad176 1735
6f9be83d
TM		 1736/**
1737 * nfs_inode_attrs_cmp - compare attributes
1738 * @fattr: attributes
1739 * @inode: pointer to inode
1740 *
1741 * This function returns '1' if it thinks the attributes in @fattr are
1742 * more recent than the ones cached in @inode. It returns '-1' if
1743 * the attributes in @inode are more recent than the ones in @fattr,
1744 * and it returns 0 if not sure.
1745 */
1746static int nfs_inode_attrs_cmp(const struct nfs_fattr *fattr,
1747 const struct inode *inode)
1748{
1749 if (nfs_inode_attrs_cmp_generic(fattr, inode) > 0)
1750 return 1;
1751 switch (NFS_SERVER(inode)->change_attr_type) {
1752 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
1753 break;
1754 case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
1755 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1756 break;
1757 return nfs_inode_attrs_cmp_monotonic(fattr, inode);
1758 default:
1759 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1760 break;
1761 return nfs_inode_attrs_cmp_strict_monotonic(fattr, inode);
1762 }
1763 return 0;
1764}
1765
7b24dacf
TM		 1766/**
1767 * nfs_inode_finish_partial_attr_update - complete a previous inode update
1768 * @fattr: attributes
1769 * @inode: pointer to inode
1770 *
1771 * Returns '1' if the last attribute update left the inode cached
1772 * attributes in a partially unrevalidated state, and @fattr
1773 * matches the change attribute of that partial update.
1774 * Otherwise returns '0'.
1775 */
1776static int nfs_inode_finish_partial_attr_update(const struct nfs_fattr *fattr,
1777 const struct inode *inode)
1778{
1779 const unsigned long check_valid =
1780 NFS_INO_INVALID_ATIME | NFS_INO_INVALID_CTIME |
1781 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
1782 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_OTHER |
1783 NFS_INO_INVALID_NLINK;
1784 unsigned long cache_validity = NFS_I(inode)->cache_validity;
17e77558 1785 enum nfs4_change_attr_type ctype = NFS_SERVER(inode)->change_attr_type;
7b24dacf 1786
17e77558
TM		 1787 if (ctype != NFS4_CHANGE_TYPE_IS_UNDEFINED &&
1788 !(cache_validity & NFS_INO_INVALID_CHANGE) &&
7b24dacf
TM		 1789 (cache_validity & check_valid) != 0 &&
1790 (fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1791 nfs_inode_attrs_cmp_monotonic(fattr, inode) == 0)
1792 return 1;
1793 return 0;
a10ad176
TM		 1794}
1795
6f9be83d
TM		 1796static int nfs_refresh_inode_locked(struct inode *inode,
1797 struct nfs_fattr *fattr)
a10ad176 1798{
6f9be83d
TM		 1799 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
1800 int ret = 0;
f4ce1299
TM		 1801
1802 trace_nfs_refresh_inode_enter(inode);
1803
7b24dacf 1804 if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode))
f4ce1299 1805 ret = nfs_update_inode(inode, fattr);
6f9be83d 1806 else if (attr_cmp == 0)
f4ce1299
TM		 1807 ret = nfs_check_inode_attributes(inode, fattr);
1808
1809 trace_nfs_refresh_inode_exit(inode, ret);
1810 return ret;
870a5be8
TM		 1811}
1812
33801147
TM		 1813/**
1814 * nfs_refresh_inode - try to update the inode attribute cache
302fad7b
TM		 1815 * @inode: pointer to inode
1816 * @fattr: updated attributes
33801147
TM		 1817 *
1818 * Check that an RPC call that returned attributes has not overlapped with
1819 * other recent updates of the inode metadata, then decide whether it is
1820 * safe to do a full update of the inode attributes, or whether just to
1821 * call nfs_check_inode_attributes.
1822 */
1823int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1824{
33801147
TM		 1825 int status;
1826
1827 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1828 return 0;
1829 spin_lock(&inode->i_lock);
870a5be8 1830 status = nfs_refresh_inode_locked(inode, fattr);
33801147 1831 spin_unlock(&inode->i_lock);
ef79c097 1832
33801147
TM		 1833 return status;
1834}
ddda8e0a 1835EXPORT_SYMBOL_GPL(nfs_refresh_inode);
33801147 1836
16e14375
TM		 1837static int nfs_post_op_update_inode_locked(struct inode *inode,
1838 struct nfs_fattr *fattr, unsigned int invalid)
d65f557f 1839{
6edf9609
TM		 1840 if (S_ISDIR(inode->i_mode))
1841 invalid |= NFS_INO_INVALID_DATA;
1842 nfs_set_cache_invalid(inode, invalid);
d65f557f
TM		 1843 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1844 return 0;
1845 return nfs_refresh_inode_locked(inode, fattr);
1846}
1847
decf491f
TM		 1848/**
1849 * nfs_post_op_update_inode - try to update the inode attribute cache
302fad7b
TM		 1850 * @inode: pointer to inode
1851 * @fattr: updated attributes
decf491f
TM		 1852 *
1853 * After an operation that has changed the inode metadata, mark the
1854 * attribute cache as being invalid, then try to update it.
f551e44f
CL		 1855 *
1856 * NB: if the server didn't return any post op attributes, this
1857 * function will force the retrieval of attributes before the next
1858 * NFS request. Thus it should be used only for operations that
1859 * are expected to change one or more attributes, to avoid
1860 * unnecessary NFS requests and trips through nfs_update_inode().
decf491f
TM		 1861 */
1862int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1863{
d65f557f 1864 int status;
decf491f 1865
7668fdbe 1866 spin_lock(&inode->i_lock);
92d64e47 1867 nfs_fattr_set_barrier(fattr);
16e14375
TM		 1868 status = nfs_post_op_update_inode_locked(inode, fattr,
1869 NFS_INO_INVALID_CHANGE
d554168f
TM		 1870 | NFS_INO_INVALID_CTIME
1871 | NFS_INO_REVAL_FORCED);
7668fdbe 1872 spin_unlock(&inode->i_lock);
aa9c2669 1873
870a5be8 1874 return status;
decf491f 1875}
1c606fb7 1876EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
decf491f 1877
70ca8852 1878/**
a08a8cd3 1879 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
302fad7b
TM		 1880 * @inode: pointer to inode
1881 * @fattr: updated attributes
70ca8852
TM		 1882 *
1883 * After an operation that has changed the inode metadata, mark the
1884 * attribute cache as being invalid, then try to update it. Fake up
1885 * weak cache consistency data, if none exist.
1886 *
1887 * This function is mainly designed to be used by the ->write_done() functions.
1888 */
a08a8cd3 1889int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
70ca8852 1890{
6f9be83d 1891 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
d65f557f
TM		 1892 int status;
1893
d65f557f 1894 /* Don't do a WCC update if these attributes are already stale */
6f9be83d
TM		 1895 if (attr_cmp < 0)
1896 return 0;
1897 if ((fattr->valid & NFS_ATTR_FATTR) == 0 || !attr_cmp) {
9e6e70f8
TM		 1898 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1899 | NFS_ATTR_FATTR_PRESIZE
1900 | NFS_ATTR_FATTR_PREMTIME
1901 | NFS_ATTR_FATTR_PRECTIME);
d65f557f
TM		 1902 goto out_noforce;
1903 }
9e6e70f8
TM		 1904 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1905 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1eb5d98f 1906 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
9e6e70f8 1907 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
70ca8852 1908 }
9e6e70f8
TM		 1909 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1910 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
e86d5a02 1911 fattr->pre_ctime = inode->i_ctime;
9e6e70f8
TM		 1912 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1913 }
1914 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1915 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
e86d5a02 1916 fattr->pre_mtime = inode->i_mtime;
9e6e70f8
TM		 1917 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1918 }
1919 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1920 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
a3d01454 1921 fattr->pre_size = i_size_read(inode);
9e6e70f8 1922 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
70ca8852 1923 }
d65f557f 1924out_noforce:
16e14375
TM		 1925 status = nfs_post_op_update_inode_locked(inode, fattr,
1926 NFS_INO_INVALID_CHANGE
1927 | NFS_INO_INVALID_CTIME
3a39e778
ZB		 1928 | NFS_INO_INVALID_MTIME
1929 | NFS_INO_INVALID_BLOCKS);
a08a8cd3
TM		 1930 return status;
1931}
1932
1933/**
1934 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
302fad7b
TM		 1935 * @inode: pointer to inode
1936 * @fattr: updated attributes
a08a8cd3
TM		 1937 *
1938 * After an operation that has changed the inode metadata, mark the
1939 * attribute cache as being invalid, then try to update it. Fake up
1940 * weak cache consistency data, if none exist.
1941 *
1942 * This function is mainly designed to be used by the ->write_done() functions.
1943 */
1944int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1945{
1946 int status;
1947
1948 spin_lock(&inode->i_lock);
8f8ba1d7 1949 nfs_fattr_set_barrier(fattr);
a08a8cd3 1950 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
d65f557f
TM		 1951 spin_unlock(&inode->i_lock);
1952 return status;
70ca8852 1953}
ddda8e0a 1954EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
70ca8852 1955
ea96d1ec 1956
1da177e4
LT		 1957/*
1958 * Many nfs protocol calls return the new file attributes after
1959 * an operation. Here we update the inode to reflect the state
1960 * of the server's inode.
1961 *
1962 * This is a bit tricky because we have to make sure all dirty pages
1963 * have been sent off to the server before calling invalidate_inode_pages.
1964 * To make sure no other process adds more write requests while we try
1965 * our best to flush them, we make them sleep during the attribute refresh.
1966 *
1967 * A very similar scenario holds for the dir cache.
1968 */
24aa1fe6 1969static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1da177e4 1970{
ce62b114 1971 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1972 struct nfs_inode *nfsi = NFS_I(inode);
951a143b 1973 loff_t cur_isize, new_isize;
ce62b114 1974 u64 fattr_supported = server->fattr_valid;
2a3f5fd4 1975 unsigned long invalid = 0;
3e7d950a 1976 unsigned long now = jiffies;
62ab460c 1977 unsigned long save_cache_validity;
651b0e70 1978 bool have_writers = nfs_file_has_buffered_writers(nfsi);
944171cb 1979 bool cache_revalidated = true;
0b467264 1980 bool attr_changed = false;
c80d17c5 1981 bool have_delegation;
1da177e4 1982
1e8968c5 1983 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
3110ff80 1984 __func__, inode->i_sb->s_id, inode->i_ino,
4f1abd22 1985 nfs_display_fhandle_hash(NFS_FH(inode)),
1da177e4
LT		 1986 atomic_read(&inode->i_count), fattr->valid);
1987
eb3d8f42
TM		 1988 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1989 /* Only a mounted-on-fileid? Just exit */
1990 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1991 return 0;
7e10cc25 1992 /* Has the inode gone and changed behind our back? */
eb3d8f42 1993 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 1994 /* Is this perhaps the mounted-on fileid? */
1995 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1996 nfsi->fileid == fattr->mounted_on_fileid)
1997 return 0;
e73e6c9e
MT		 1998 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1999 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
2000 NFS_SERVER(inode)->nfs_client->cl_hostname,
2001 inode->i_sb->s_id, (long long)nfsi->fileid,
2002 (long long)fattr->fileid);
2003 goto out_err;
2004 }
1da177e4
LT		 2005
2006 /*
2007 * Make sure the inode's type hasn't changed.
2008 */
6e3e2c43 2009 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) {
e73e6c9e
MT		 2010 /*
2011 * Big trouble! The inode has become a different object.
2012 */
1e8968c5 2013 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
e73e6c9e
MT		 2014 __func__, inode->i_ino, inode->i_mode, fattr->mode);
2015 goto out_err;
2016 }
1da177e4 2017
a0356862 2018 /* Update the fsid? */
9e6e70f8 2019 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
c37dcd33 2020 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
36d43a43 2021 !IS_AUTOMOUNT(inode))
8b4bdcf8
TM		 2022 server->fsid = fattr->fsid;
2023
c80d17c5
TM		 2024 /* Save the delegation state before clearing cache_validity */
2025 have_delegation = nfs_have_delegated_attributes(inode);
2026
1da177e4
LT		 2027 /*
2028 * Update the read time so we don't revalidate too often.
2029 */
33801147 2030 nfsi->read_cache_jiffies = fattr->time_start;
3e7d950a 2031
62ab460c
TM		 2032 save_cache_validity = nfsi->cache_validity;
2033 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
2034 | NFS_INO_INVALID_ATIME
2035 | NFS_INO_REVAL_FORCED
3a39e778 2036 | NFS_INO_INVALID_BLOCKS);
1da177e4 2037
a895b4a1 2038 /* Do atomic weak cache consistency updates */
783b194c 2039 nfs_wcc_update_inode(inode, fattr);
a895b4a1 2040
944171cb 2041 if (pnfs_layoutcommit_outstanding(inode)) {
709fa576
TM		 2042 nfsi->cache_validity |=
2043 save_cache_validity &
2044 (NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |
2045 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
cc7f2dae 2046 NFS_INO_INVALID_BLOCKS);
944171cb
BC		 2047 cache_revalidated = false;
2048 }
10b7e9ad 2049
47aabaa7 2050 /* More cache consistency checks */
9e6e70f8 2051 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
c472c07b 2052 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
38512aa9 2053 /* Could it be a race with writeback? */
c80d17c5 2054 if (!(have_writers || have_delegation)) {
0b467264 2055 invalid |= NFS_INO_INVALID_DATA
38512aa9 2056 | NFS_INO_INVALID_ACCESS
95ad37f9
FL		 2057 | NFS_INO_INVALID_ACL
2058 | NFS_INO_INVALID_XATTR;
cac88f94 2059 /* Force revalidate of all attributes */
16e14375
TM		 2060 save_cache_validity |= NFS_INO_INVALID_CTIME
2061 | NFS_INO_INVALID_MTIME
2062 | NFS_INO_INVALID_SIZE
4cdfeb64 2063 | NFS_INO_INVALID_BLOCKS
fabf2b34 2064 | NFS_INO_INVALID_NLINK
720869eb 2065 | NFS_INO_INVALID_MODE
16e14375 2066 | NFS_INO_INVALID_OTHER;
38512aa9
TM		 2067 if (S_ISDIR(inode->i_mode))
2068 nfs_force_lookup_revalidate(inode);
a9601ac5 2069 attr_changed = true;
c80d17c5
TM		 2070 dprintk("NFS: change_attr change on server for file %s/%ld\n",
2071 inode->i_sb->s_id,
2072 inode->i_ino);
1c341b77
TM		 2073 } else if (!have_delegation)
2074 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1eb5d98f 2075 inode_set_iversion_raw(inode, fattr->change_attr);
9e6e70f8 2076 }
ade14a7d 2077 } else {
cc7f2dae
TM		 2078 nfsi->cache_validity |=
2079 save_cache_validity & NFS_INO_INVALID_CHANGE;
213bb584
TM		 2080 if (!have_delegation ||
2081 (nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0)
2082 cache_revalidated = false;
ade14a7d 2083 }
9e6e70f8 2084
213bb584 2085 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 2086 inode->i_mtime = fattr->mtime;
213bb584 2087 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
cc7f2dae
TM		 2088 nfsi->cache_validity |=
2089 save_cache_validity & NFS_INO_INVALID_MTIME;
62ab460c 2090
213bb584 2091 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 2092 inode->i_ctime = fattr->ctime;
213bb584 2093 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
cc7f2dae
TM		 2094 nfsi->cache_validity |=
2095 save_cache_validity & NFS_INO_INVALID_CTIME;
47aabaa7 2096
951a143b 2097 /* Check if our cached file size is stale */
9e6e70f8
TM		 2098 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
2099 new_isize = nfs_size_to_loff_t(fattr->size);
2100 cur_isize = i_size_read(inode);
c80d17c5 2101 if (new_isize != cur_isize && !have_delegation) {
9e6e70f8
TM		 2102 /* Do we perhaps have any outstanding writes, or has
2103 * the file grown beyond our last write? */
a6b6d5b8 2104 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
9e6e70f8 2105 i_size_write(inode, new_isize);
ca0daa27 2106 if (!have_writers)
16e14375 2107 invalid |= NFS_INO_INVALID_DATA;
9e6e70f8 2108 }
60c16ea8
HJ		 2109 dprintk("NFS: isize change on server for file %s/%ld "
2110 "(%Ld to %Ld)\n",
2111 inode->i_sb->s_id,
2112 inode->i_ino,
2113 (long long)cur_isize,
2114 (long long)new_isize);
1da177e4 2115 }
4cdfeb64
TM		 2116 if (new_isize == 0 &&
2117 !(fattr->valid & (NFS_ATTR_FATTR_SPACE_USED |
2118 NFS_ATTR_FATTR_BLOCKS_USED))) {
2119 fattr->du.nfs3.used = 0;
2120 fattr->valid |= NFS_ATTR_FATTR_SPACE_USED;
2121 }
213bb584 2122 } else
cc7f2dae
TM		 2123 nfsi->cache_validity |=
2124 save_cache_validity & NFS_INO_INVALID_SIZE;
1da177e4 2125
9e6e70f8 2126 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 2127 inode->i_atime = fattr->atime;
213bb584 2128 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
cc7f2dae
TM		 2129 nfsi->cache_validity |=
2130 save_cache_validity & NFS_INO_INVALID_ATIME;
1da177e4 2131
9e6e70f8
TM		 2132 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
2133 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
9b4b3513
TM		 2134 umode_t newmode = inode->i_mode & S_IFMT;
2135 newmode |= fattr->mode & S_IALLUGO;
2136 inode->i_mode = newmode;
16e14375 2137 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2138 | NFS_INO_INVALID_ACL;
9e6e70f8 2139 }
213bb584 2140 } else if (fattr_supported & NFS_ATTR_FATTR_MODE)
cc7f2dae
TM		 2141 nfsi->cache_validity |=
2142 save_cache_validity & NFS_INO_INVALID_MODE;
62ab460c 2143
9e6e70f8 2144 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
9ff593c4 2145 if (!uid_eq(inode->i_uid, fattr->uid)) {
16e14375 2146 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2147 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2148 inode->i_uid = fattr->uid;
2149 }
213bb584 2150 } else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
cc7f2dae
TM		 2151 nfsi->cache_validity |=
2152 save_cache_validity & NFS_INO_INVALID_OTHER;
62ab460c 2153
9e6e70f8 2154 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
9ff593c4 2155 if (!gid_eq(inode->i_gid, fattr->gid)) {
16e14375 2156 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2157 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2158 inode->i_gid = fattr->gid;
2159 }
213bb584 2160 } else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
cc7f2dae
TM		 2161 nfsi->cache_validity |=
2162 save_cache_validity & NFS_INO_INVALID_OTHER;
921615f1 2163
9e6e70f8
TM		 2164 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
2165 if (inode->i_nlink != fattr->nlink) {
9e6e70f8
TM		 2166 if (S_ISDIR(inode->i_mode))
2167 invalid |= NFS_INO_INVALID_DATA;
bfe86848 2168 set_nlink(inode, fattr->nlink);
9e6e70f8 2169 }
213bb584 2170 } else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
cc7f2dae
TM		 2171 nfsi->cache_validity |=
2172 save_cache_validity & NFS_INO_INVALID_NLINK;
1da177e4 2173
9e6e70f8 2174 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 2175 /*
2176 * report the blocks in 512byte units
2177 */
2178 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
213bb584 2179 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED)
ce62b114
TM		 2180 nfsi->cache_validity |=
2181 save_cache_validity & NFS_INO_INVALID_BLOCKS;
ce62b114 2182
213bb584 2183 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
9e6e70f8 2184 inode->i_blocks = fattr->du.nfs2.blocks;
213bb584 2185 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED)
cc7f2dae
TM		 2186 nfsi->cache_validity |=
2187 save_cache_validity & NFS_INO_INVALID_BLOCKS;
1da177e4
LT		 2188
2189 /* Update attrtimeo value if we're out of the unstable period */
0b467264 2190 if (attr_changed) {
91d5b470 2191 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1da177e4 2192 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
3e7d950a 2193 nfsi->attrtimeo_timestamp = now;
f5062003 2194 /* Set barrier to be more recent than all outstanding updates */
4704f0e2 2195 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
6d2b2966 2196 } else {
ade14a7d
TM		 2197 if (cache_revalidated) {
2198 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2199 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2200 nfsi->attrtimeo <<= 1;
2201 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2202 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2203 }
6d2b2966
TM		 2204 nfsi->attrtimeo_timestamp = now;
2205 }
f5062003 2206 /* Set the barrier to be more recent than this fattr */
9fdbfad1 2207 if ((long)(fattr->gencount - nfsi->attr_gencount) > 0)
f5062003 2208 nfsi->attr_gencount = fattr->gencount;
1da177e4 2209 }
c812012f 2210
1da177e4
LT		 2211 /* Don't invalidate the data if we were to blame */
2212 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2213 || S_ISLNK(inode->i_mode)))
2214 invalid &= ~NFS_INO_INVALID_DATA;
c80d17c5 2215 nfs_set_cache_invalid(inode, invalid);
de242c0b 2216
1da177e4 2217 return 0;
b37b03b7 2218 out_err:
1da177e4
LT		 2219 /*
2220 * No need to worry about unhashing the dentry, as the
2221 * lookup validation will know that the inode is bad.
2222 * (But we fall through to invalidate the caches.)
2223 */
93ce4af7 2224 nfs_set_inode_stale_locked(inode);
1da177e4
LT		 2225 return -ESTALE;
2226}
2227
f7b422b1 2228struct inode *nfs_alloc_inode(struct super_block *sb)
1da177e4
LT		 2229{
2230 struct nfs_inode *nfsi;
c456aacf 2231 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 2232 if (!nfsi)
2233 return NULL;
55296809
CL		 2234 nfsi->flags = 0UL;
2235 nfsi->cache_validity = 0UL;
89d77c8f 2236#if IS_ENABLED(CONFIG_NFS_V4)
e50a1c2e
BF		 2237 nfsi->nfs4_acl = NULL;
2238#endif /* CONFIG_NFS_V4 */
95ad37f9
FL		 2239#ifdef CONFIG_NFS_V4_2
2240 nfsi->xattr_cache = NULL;
2241#endif
1da177e4
LT		 2242 return &nfsi->vfs_inode;
2243}
89d77c8f 2244EXPORT_SYMBOL_GPL(nfs_alloc_inode);
1da177e4 2245
ca1a199e 2246void nfs_free_inode(struct inode *inode)
1da177e4
LT		 2247{
2248 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2249}
ca1a199e 2250EXPORT_SYMBOL_GPL(nfs_free_inode);
fa0d7e3d 2251
d75d5414
AM		 2252static inline void nfs4_init_once(struct nfs_inode *nfsi)
2253{
89d77c8f 2254#if IS_ENABLED(CONFIG_NFS_V4)
d75d5414
AM		 2255 INIT_LIST_HEAD(&nfsi->open_states);
2256 nfsi->delegation = NULL;
d75d5414 2257 init_rwsem(&nfsi->rwsem);
e5e94017 2258 nfsi->layout = NULL;
d75d5414
AM		 2259#endif
2260}
f7b422b1 2261
51cc5068 2262static void init_once(void *foo)
1da177e4
LT		 2263{
2264 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2265
a35afb83 2266 inode_init_once(&nfsi->vfs_inode);
a35afb83
CL		 2267 INIT_LIST_HEAD(&nfsi->open_files);
2268 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2269 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
ea2cf228 2270 INIT_LIST_HEAD(&nfsi->commit_info.list);
a6b6d5b8 2271 atomic_long_set(&nfsi->nrequests, 0);
5cb953d4 2272 atomic_long_set(&nfsi->commit_info.ncommit, 0);
1a0de48a 2273 atomic_set(&nfsi->commit_info.rpcs_out, 0);
884be175 2274 init_rwsem(&nfsi->rmdir_sem);
e824f99a 2275 mutex_init(&nfsi->commit_mutex);
a35afb83 2276 nfs4_init_once(nfsi);
efeda80d 2277 nfsi->cache_change_attribute = 0;
1da177e4 2278}
20c2df83 2279
f7b422b1 2280static int __init nfs_init_inodecache(void)
1da177e4
LT		 2281{
2282 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2283 sizeof(struct nfs_inode),
fffb60f9 2284 0, (SLAB_RECLAIM_ACCOUNT|
5d097056 2285 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
20c2df83 2286 init_once);
1da177e4
LT		 2287 if (nfs_inode_cachep == NULL)
2288 return -ENOMEM;
2289
2290 return 0;
2291}
2292
266bee88 2293static void nfs_destroy_inodecache(void)
1da177e4 2294{
8c0a8537
KS		 2295 /*
2296 * Make sure all delayed rcu free inodes are flushed before we
2297 * destroy cache.
2298 */
2299 rcu_barrier();
1a1d92c1 2300 kmem_cache_destroy(nfs_inode_cachep);
1da177e4
LT		 2301}
2302
5746006f 2303struct workqueue_struct *nfsiod_workqueue;
89d77c8f 2304EXPORT_SYMBOL_GPL(nfsiod_workqueue);
5746006f
TM		 2305
2306/*
2307 * start up the nfsiod workqueue
2308 */
2309static int nfsiod_start(void)
2310{
2311 struct workqueue_struct *wq;
2312 dprintk("RPC: creating workqueue nfsiod\n");
bf701b76 2313 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
5746006f
TM		 2314 if (wq == NULL)
2315 return -ENOMEM;
2316 nfsiod_workqueue = wq;
2317 return 0;
2318}
2319
2320/*
2321 * Destroy the nfsiod workqueue
2322 */
2323static void nfsiod_stop(void)
2324{
2325 struct workqueue_struct *wq;
2326
2327 wq = nfsiod_workqueue;
2328 if (wq == NULL)
2329 return;
2330 nfsiod_workqueue = NULL;
2331 destroy_workqueue(wq);
2332}
2333
c7d03a00 2334unsigned int nfs_net_id;
9e2e74db 2335EXPORT_SYMBOL_GPL(nfs_net_id);
1b340d01
SK		 2336
2337static int nfs_net_init(struct net *net)
2338{
6b13168b 2339 nfs_clients_init(net);
65b38851 2340 return nfs_fs_proc_net_init(net);
1b340d01
SK		 2341}
2342
2343static void nfs_net_exit(struct net *net)
2344{
65b38851 2345 nfs_fs_proc_net_exit(net);
10b7a70c 2346 nfs_clients_exit(net);
1b340d01
SK		 2347}
2348
2349static struct pernet_operations nfs_net_ops = {
2350 .init = nfs_net_init,
2351 .exit = nfs_net_exit,
2352 .id = &nfs_net_id,
2353 .size = sizeof(struct nfs_net),
2354};
2355
1da177e4
LT		 2356/*
2357 * Initialize NFS
2358 */
2359static int __init init_nfs_fs(void)
2360{
2361 int err;
2362
996bc4f4
TM		 2363 err = nfs_sysfs_init();
2364 if (err < 0)
2365 goto out10;
2366
1b340d01 2367 err = register_pernet_subsys(&nfs_net_ops);
e571cbf1 2368 if (err < 0)
89d77c8f 2369 goto out9;
e571cbf1 2370
8ec442ae
DH		 2371 err = nfs_fscache_register();
2372 if (err < 0)
89d77c8f 2373 goto out8;
8ec442ae 2374
5746006f
TM		 2375 err = nfsiod_start();
2376 if (err)
89d77c8f 2377 goto out7;
5746006f 2378
6aaca566
DH		 2379 err = nfs_fs_proc_init();
2380 if (err)
89d77c8f 2381 goto out6;
6aaca566 2382
1da177e4
LT		 2383 err = nfs_init_nfspagecache();
2384 if (err)
89d77c8f 2385 goto out5;
1da177e4
LT		 2386
2387 err = nfs_init_inodecache();
2388 if (err)
89d77c8f 2389 goto out4;
1da177e4
LT		 2390
2391 err = nfs_init_readpagecache();
2392 if (err)
89d77c8f 2393 goto out3;
1da177e4
LT		 2394
2395 err = nfs_init_writepagecache();
2396 if (err)
89d77c8f 2397 goto out2;
1da177e4 2398
1da177e4
LT		 2399 err = nfs_init_directcache();
2400 if (err)
89d77c8f 2401 goto out1;
1da177e4 2402
ec7652aa 2403 rpc_proc_register(&init_net, &nfs_rpcstat);
cd738ee9
KM		 2404
2405 err = register_nfs_fs();
2406 if (err)
129d1977
BS		 2407 goto out0;
2408
1da177e4 2409 return 0;
129d1977 2410out0:
ec7652aa 2411 rpc_proc_unregister(&init_net, "nfs");
1da177e4 2412 nfs_destroy_directcache();
89d77c8f 2413out1:
129d1977 2414 nfs_destroy_writepagecache();
89d77c8f 2415out2:
129d1977 2416 nfs_destroy_readpagecache();
89d77c8f 2417out3:
129d1977 2418 nfs_destroy_inodecache();
89d77c8f 2419out4:
129d1977 2420 nfs_destroy_nfspagecache();
89d77c8f 2421out5:
129d1977 2422 nfs_fs_proc_exit();
89d77c8f 2423out6:
129d1977 2424 nfsiod_stop();
89d77c8f 2425out7:
129d1977 2426 nfs_fscache_unregister();
89d77c8f 2427out8:
129d1977 2428 unregister_pernet_subsys(&nfs_net_ops);
89d77c8f 2429out9:
996bc4f4
TM		 2430 nfs_sysfs_exit();
2431out10:
1da177e4
LT		 2432 return err;
2433}
2434
2435static void __exit exit_nfs_fs(void)
2436{
1da177e4 2437 nfs_destroy_directcache();
1da177e4
LT		 2438 nfs_destroy_writepagecache();
2439 nfs_destroy_readpagecache();
2440 nfs_destroy_inodecache();
2441 nfs_destroy_nfspagecache();
8ec442ae 2442 nfs_fscache_unregister();
1b340d01 2443 unregister_pernet_subsys(&nfs_net_ops);
ec7652aa 2444 rpc_proc_unregister(&init_net, "nfs");
f7b422b1 2445 unregister_nfs_fs();
6aaca566 2446 nfs_fs_proc_exit();
5746006f 2447 nfsiod_stop();
996bc4f4 2448 nfs_sysfs_exit();
1da177e4
LT		 2449}
2450
2451/* Not quite true; I just maintain it */
2452MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2453MODULE_LICENSE("GPL");
f43bf0be 2454module_param(enable_ino64, bool, 0644);
1da177e4
LT		 2455
2456module_init(init_nfs_fs)
2457module_exit(exit_nfs_fs)
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