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