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Merge tag 'nfs-for-6.9-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
[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 210
3db63daa
N		 211 if (inode->i_mapping->nrpages == 0) {
212 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
213 nfs_ooo_clear(nfsi);
214 } else if (nfsi->cache_validity & NFS_INO_INVALID_DATA) {
215 nfs_ooo_clear(nfsi);
216 }
93c2e5e0 217 trace_nfs_set_cache_invalid(inode, 0);
6edf9609 218}
b6f80a2e 219EXPORT_SYMBOL_GPL(nfs_set_cache_invalid);
6edf9609 220
1da177e4
LT		 221/*
222 * Invalidate the local caches
223 */
b37b03b7 224static void nfs_zap_caches_locked(struct inode *inode)
1da177e4
LT		 225{
226 struct nfs_inode *nfsi = NFS_I(inode);
227 int mode = inode->i_mode;
228
91d5b470
CL		 229 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
230
c7c20973
TM		 231 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
232 nfsi->attrtimeo_timestamp = jiffies;
1da177e4 233
88a6099f
TM		 234 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
235 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
236 NFS_INO_INVALID_DATA |
237 NFS_INO_INVALID_ACCESS |
238 NFS_INO_INVALID_ACL |
239 NFS_INO_INVALID_XATTR);
240 else
241 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR |
242 NFS_INO_INVALID_ACCESS |
243 NFS_INO_INVALID_ACL |
244 NFS_INO_INVALID_XATTR);
fd1defc2 245 nfs_zap_label_cache_locked(nfsi);
b37b03b7 246}
dc59250c 247
b37b03b7
TM		 248void nfs_zap_caches(struct inode *inode)
249{
250 spin_lock(&inode->i_lock);
251 nfs_zap_caches_locked(inode);
dc59250c 252 spin_unlock(&inode->i_lock);
ada70d94
TM		 253}
254
cd9ae2b6
TM		 255void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
256{
257 if (mapping->nrpages != 0) {
258 spin_lock(&inode->i_lock);
6edf9609 259 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
cd9ae2b6
TM		 260 spin_unlock(&inode->i_lock);
261 }
262}
263
f41f7418 264void nfs_zap_acl_cache(struct inode *inode)
ada70d94
TM		 265{
266 void (*clear_acl_cache)(struct inode *);
267
268 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
269 if (clear_acl_cache != NULL)
270 clear_acl_cache(inode);
dc59250c 271 spin_lock(&inode->i_lock);
55296809 272 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
dc59250c 273 spin_unlock(&inode->i_lock);
1da177e4 274}
1c606fb7 275EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
1da177e4 276
c4812998
TM		 277void nfs_invalidate_atime(struct inode *inode)
278{
279 spin_lock(&inode->i_lock);
6edf9609 280 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
c4812998
TM		 281 spin_unlock(&inode->i_lock);
282}
ddda8e0a 283EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
c4812998 284
1da177e4 285/*
b37b03b7
TM		 286 * Invalidate, but do not unhash, the inode.
287 * NB: must be called with inode->i_lock held!
1da177e4 288 */
93ce4af7 289static void nfs_set_inode_stale_locked(struct inode *inode)
1da177e4 290{
3a10c30a 291 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
b37b03b7 292 nfs_zap_caches_locked(inode);
93ce4af7
TM		 293 trace_nfs_set_inode_stale(inode);
294}
295
296void nfs_set_inode_stale(struct inode *inode)
297{
298 spin_lock(&inode->i_lock);
299 nfs_set_inode_stale_locked(inode);
300 spin_unlock(&inode->i_lock);
1da177e4
LT		 301}
302
303struct nfs_find_desc {
304 struct nfs_fh *fh;
305 struct nfs_fattr *fattr;
306};
307
308/*
309 * In NFSv3 we can have 64bit inode numbers. In order to support
310 * this, and re-exported directories (also seen in NFSv2)
311 * we are forced to allow 2 different inodes to have the same
312 * i_ino.
313 */
314static int
315nfs_find_actor(struct inode *inode, void *opaque)
316{
7e7ce2cc 317 struct nfs_find_desc *desc = opaque;
1da177e4
LT		 318 struct nfs_fh *fh = desc->fh;
319 struct nfs_fattr *fattr = desc->fattr;
320
321 if (NFS_FILEID(inode) != fattr->fileid)
322 return 0;
6e3e2c43 323 if (inode_wrong_type(inode, fattr->mode))
f6488c9b 324 return 0;
1da177e4
LT		 325 if (nfs_compare_fh(NFS_FH(inode), fh))
326 return 0;
327 if (is_bad_inode(inode) || NFS_STALE(inode))
328 return 0;
329 return 1;
330}
331
332static int
333nfs_init_locked(struct inode *inode, void *opaque)
334{
7e7ce2cc 335 struct nfs_find_desc *desc = opaque;
1da177e4
LT		 336 struct nfs_fattr *fattr = desc->fattr;
337
99fadcd7 338 set_nfs_fileid(inode, fattr->fileid);
916ec34d 339 inode->i_mode = fattr->mode;
1da177e4
LT		 340 nfs_copy_fh(NFS_FH(inode), desc->fh);
341 return 0;
342}
343
e058f70b 344#ifdef CONFIG_NFS_V4_SECURITY_LABEL
fd1defc2
TM		 345static void nfs_clear_label_invalid(struct inode *inode)
346{
347 spin_lock(&inode->i_lock);
348 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
349 spin_unlock(&inode->i_lock);
350}
351
dd225cb3 352void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr)
aa9c2669
DQ		 353{
354 int error;
355
dd225cb3 356 if (fattr->label == NULL)
aa9c2669
DQ		 357 return;
358
aa9c2669 359 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
dd225cb3
AS		 360 error = security_inode_notifysecctx(inode, fattr->label->label,
361 fattr->label->len);
aa9c2669
DQ		 362 if (error)
363 printk(KERN_ERR "%s() %s %d "
364 "security_inode_notifysecctx() %d\n",
365 __func__,
dd225cb3
AS		 366 (char *)fattr->label->label,
367 fattr->label->len, error);
fd1defc2 368 nfs_clear_label_invalid(inode);
aa9c2669
DQ		 369 }
370}
371
e058f70b
SD		 372struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
373{
e48c81bb 374 struct nfs4_label *label;
e058f70b
SD		 375
376 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
e48c81bb 377 return NULL;
e058f70b
SD		 378
379 label = kzalloc(sizeof(struct nfs4_label), flags);
380 if (label == NULL)
381 return ERR_PTR(-ENOMEM);
382
383 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
384 if (label->label == NULL) {
385 kfree(label);
386 return ERR_PTR(-ENOMEM);
387 }
388 label->len = NFS4_MAXLABELLEN;
389
390 return label;
391}
392EXPORT_SYMBOL_GPL(nfs4_label_alloc);
aa9c2669 393#else
dd225cb3 394void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr)
aa9c2669
DQ		 395{
396}
e058f70b 397#endif
aa9c2669 398EXPORT_SYMBOL_GPL(nfs_setsecurity);
e058f70b 399
f174ff7a
PT		 400/* Search for inode identified by fh, fileid and i_mode in inode cache. */
401struct inode *
402nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
403{
404 struct nfs_find_desc desc = {
405 .fh = fh,
406 .fattr = fattr,
407 };
408 struct inode *inode;
409 unsigned long hash;
410
411 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
412 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
413 return NULL;
414
415 hash = nfs_fattr_to_ino_t(fattr);
416 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
417
418 dprintk("%s: returning %p\n", __func__, inode);
419 return inode;
420}
421
e591b298
TM		 422static void nfs_inode_init_regular(struct nfs_inode *nfsi)
423{
424 atomic_long_set(&nfsi->nrequests, 0);
67f4b5dc 425 atomic_long_set(&nfsi->redirtied_pages, 0);
e591b298
TM		 426 INIT_LIST_HEAD(&nfsi->commit_info.list);
427 atomic_long_set(&nfsi->commit_info.ncommit, 0);
428 atomic_set(&nfsi->commit_info.rpcs_out, 0);
429 mutex_init(&nfsi->commit_mutex);
430}
431
432static void nfs_inode_init_dir(struct nfs_inode *nfsi)
433{
434 nfsi->cache_change_attribute = 0;
435 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
436 init_rwsem(&nfsi->rmdir_sem);
437}
438
1da177e4
LT		 439/*
440 * This is our front-end to iget that looks up inodes by file handle
441 * instead of inode number.
442 */
443struct inode *
cf7ab00a 444nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
1da177e4
LT		 445{
446 struct nfs_find_desc desc = {
447 .fh = fh,
448 .fattr = fattr
449 };
03f28e3a 450 struct inode *inode = ERR_PTR(-ENOENT);
ce62b114 451 u64 fattr_supported = NFS_SB(sb)->fattr_valid;
1da177e4
LT		 452 unsigned long hash;
453
7ebb9315
BS		 454 nfs_attr_check_mountpoint(sb, fattr);
455
2ef47eb1
AS		 456 if (nfs_attr_use_mounted_on_fileid(fattr))
457 fattr->fileid = fattr->mounted_on_fileid;
458 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
1da177e4 459 goto out_no_inode;
9e6e70f8 460 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
1da177e4 461 goto out_no_inode;
1da177e4
LT		 462
463 hash = nfs_fattr_to_ino_t(fattr);
464
03f28e3a
TM		 465 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
466 if (inode == NULL) {
467 inode = ERR_PTR(-ENOMEM);
1da177e4 468 goto out_no_inode;
03f28e3a 469 }
1da177e4
LT		 470
471 if (inode->i_state & I_NEW) {
472 struct nfs_inode *nfsi = NFS_I(inode);
b0c4fddc 473 unsigned long now = jiffies;
1da177e4
LT		 474
475 /* We set i_ino for the few things that still rely on it,
476 * such as stat(2) */
477 inode->i_ino = hash;
478
479 /* We can't support update_atime(), since the server will reset it */
480 inode->i_flags |= S_NOATIME|S_NOCMTIME;
481 inode->i_mode = fattr->mode;
821a868a 482 nfsi->cache_validity = 0;
62ab460c 483 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
ce62b114 484 && (fattr_supported & NFS_ATTR_FATTR_MODE))
720869eb 485 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
1da177e4
LT		 486 /* Why so? Because we want revalidate for devices/FIFOs, and
487 * that's precisely what we have in nfs_file_inode_operations.
488 */
8fa5c000 489 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
1da177e4 490 if (S_ISREG(inode->i_mode)) {
1788ea6e 491 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
1da177e4 492 inode->i_data.a_ops = &nfs_file_aops;
e591b298 493 nfs_inode_init_regular(nfsi);
1da177e4 494 } else if (S_ISDIR(inode->i_mode)) {
8fa5c000 495 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
1da177e4 496 inode->i_fop = &nfs_dir_operations;
11de3b11 497 inode->i_data.a_ops = &nfs_dir_aops;
e591b298 498 nfs_inode_init_dir(nfsi);
55a97593 499 /* Deal with crossing mountpoints */
7ebb9315
BS		 500 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
501 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
6b97fd3d
MN		 502 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
503 inode->i_op = &nfs_referral_inode_operations;
504 else
505 inode->i_op = &nfs_mountpoint_inode_operations;
55a97593 506 inode->i_fop = NULL;
36d43a43 507 inode->i_flags |= S_AUTOMOUNT;
55a97593 508 }
21fc61c7 509 } else if (S_ISLNK(inode->i_mode)) {
1da177e4 510 inode->i_op = &nfs_symlink_inode_operations;
21fc61c7
AV		 511 inode_nohighmem(inode);
512 } else
1da177e4
LT		 513 init_special_inode(inode, inode->i_mode, fattr->rdev);
514
41d581a9
JL		 515 inode_set_atime(inode, 0, 0);
516 inode_set_mtime(inode, 0, 0);
55e04e9c 517 inode_set_ctime(inode, 0, 0);
1eb5d98f 518 inode_set_iversion_raw(inode, 0);
9e6e70f8 519 inode->i_size = 0;
6d6b77f1 520 clear_nlink(inode);
9ff593c4
EB		 521 inode->i_uid = make_kuid(&init_user_ns, -2);
522 inode->i_gid = make_kgid(&init_user_ns, -2);
9e6e70f8 523 inode->i_blocks = 0;
2701d086
AA		 524 nfsi->write_io = 0;
525 nfsi->read_io = 0;
9e6e70f8 526
33801147 527 nfsi->read_cache_jiffies = fattr->time_start;
4704f0e2 528 nfsi->attr_gencount = fattr->gencount;
9e6e70f8 529 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
41d581a9 530 inode_set_atime_to_ts(inode, fattr->atime);
ce62b114 531 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
16e14375 532 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
9e6e70f8 533 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
41d581a9 534 inode_set_mtime_to_ts(inode, fattr->mtime);
ce62b114 535 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
16e14375 536 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
9e6e70f8 537 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 538 inode_set_ctime_to_ts(inode, fattr->ctime);
ce62b114 539 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
16e14375 540 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
9e6e70f8 541 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1eb5d98f 542 inode_set_iversion_raw(inode, fattr->change_attr);
cd812599 543 else
16e14375 544 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
9e6e70f8
TM		 545 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
546 inode->i_size = nfs_size_to_loff_t(fattr->size);
62ab460c 547 else
16e14375 548 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
9e6e70f8 549 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
bfe86848 550 set_nlink(inode, fattr->nlink);
ce62b114 551 else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
fabf2b34 552 nfs_set_cache_invalid(inode, NFS_INO_INVALID_NLINK);
9e6e70f8
TM		 553 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
554 inode->i_uid = fattr->uid;
ce62b114 555 else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
16e14375 556 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
9e6e70f8
TM		 557 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
558 inode->i_gid = fattr->gid;
ce62b114 559 else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
16e14375 560 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
9e6e70f8
TM		 561 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
562 inode->i_blocks = fattr->du.nfs2.blocks;
ce62b114
TM		 563 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED &&
564 fattr->size != 0)
565 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
9e6e70f8 566 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 567 /*
568 * report the blocks in 512byte units
569 */
570 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
ce62b114
TM		 571 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED &&
572 fattr->size != 0)
4cdfeb64 573 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
821a868a 574
dd225cb3 575 nfs_setsecurity(inode, fattr);
aa9c2669 576
1da177e4 577 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
b0c4fddc 578 nfsi->attrtimeo_timestamp = now;
1c3c07e9 579 nfsi->access_cache = RB_ROOT;
1da177e4 580
f1fe29b4 581 nfs_fscache_init_inode(inode);
ef79c097 582
1da177e4 583 unlock_new_inode(inode);
26fde4df
N		 584 } else {
585 int err = nfs_refresh_inode(inode, fattr);
586 if (err < 0) {
587 iput(inode);
588 inode = ERR_PTR(err);
589 goto out_no_inode;
590 }
591 }
1e8968c5 592 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
1da177e4 593 inode->i_sb->s_id,
1e8968c5 594 (unsigned long long)NFS_FILEID(inode),
4f1abd22 595 nfs_display_fhandle_hash(fh),
1da177e4
LT		 596 atomic_read(&inode->i_count));
597
598out:
599 return inode;
600
601out_no_inode:
03f28e3a 602 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
1da177e4
LT		 603 goto out;
604}
89d77c8f 605EXPORT_SYMBOL_GPL(nfs_fhget);
1da177e4 606
536e43d1 607#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		 608
609int
c1632a0f 610nfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
549c7297 611 struct iattr *attr)
1da177e4 612{
2b0143b5 613 struct inode *inode = d_inode(dentry);
987f8dfc 614 struct nfs_fattr *fattr;
ae57ca0f 615 int error = 0;
1da177e4 616
91d5b470
CL		 617 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
618
188b95dd
JL		 619 /* skip mode change if it's just for clearing setuid/setgid */
620 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
621 attr->ia_valid &= ~ATTR_MODE;
622
1da177e4 623 if (attr->ia_valid & ATTR_SIZE) {
08a899d5
CH		 624 BUG_ON(!S_ISREG(inode->i_mode));
625
ae57ca0f
KM		 626 error = inode_newsize_ok(inode, attr->ia_size);
627 if (error)
628 return error;
629
630 if (attr->ia_size == i_size_read(inode))
1da177e4
LT		 631 attr->ia_valid &= ~ATTR_SIZE;
632 }
633
634 /* Optimization: if the end result is no change, don't RPC */
1f9f4328 635 if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0)
1da177e4
LT		 636 return 0;
637
f4ce1299
TM		 638 trace_nfs_setattr_enter(inode);
639
755c1e20 640 /* Write all dirty data */
4d346bea
TM		 641 if (S_ISREG(inode->i_mode))
642 nfs_sync_inode(inode);
987f8dfc 643
1b00ad65 644 fattr = nfs_alloc_fattr_with_label(NFS_SERVER(inode));
ae57ca0f
KM		 645 if (fattr == NULL) {
646 error = -ENOMEM;
987f8dfc 647 goto out;
ae57ca0f
KM		 648 }
649
987f8dfc 650 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
65e4308d 651 if (error == 0)
aa9c2669 652 error = nfs_refresh_inode(inode, fattr);
987f8dfc
TM		 653 nfs_free_fattr(fattr);
654out:
f4ce1299 655 trace_nfs_setattr_exit(inode, error);
65e4308d
TM		 656 return error;
657}
ddda8e0a 658EXPORT_SYMBOL_GPL(nfs_setattr);
65e4308d 659
a3d01454
TM		 660/**
661 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
662 * @inode: inode of the file used
663 * @offset: file offset to start truncating
664 *
665 * This is a copy of the common vmtruncate, but with the locking
666 * corrected to take into account the fact that NFS requires
667 * inode->i_size to be updated under the inode->i_lock.
f044636d 668 * Note: must be called with inode->i_lock held!
a3d01454
TM		 669 */
670static int nfs_vmtruncate(struct inode * inode, loff_t offset)
671{
c08d3b0e 672 int err;
a3d01454 673
c08d3b0e 674 err = inode_newsize_ok(inode, offset);
675 if (err)
676 goto out;
a3d01454 677
110cb2d2 678 trace_nfs_size_truncate(inode, offset);
c08d3b0e 679 i_size_write(inode, offset);
6edf9609 680 /* Optimisation */
3db63daa
N		 681 if (offset == 0) {
682 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA;
683 nfs_ooo_clear(NFS_I(inode));
684 }
f6cdfa6d 685 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
c08d3b0e 686
f044636d 687 spin_unlock(&inode->i_lock);
7caef267 688 truncate_pagecache(inode, offset);
f044636d 689 spin_lock(&inode->i_lock);
c08d3b0e 690out:
691 return err;
a3d01454
TM		 692}
693
65e4308d
TM		 694/**
695 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
696 * @inode: pointer to struct inode
697 * @attr: pointer to struct iattr
16e14375 698 * @fattr: pointer to struct nfs_fattr
65e4308d
TM		 699 *
700 * Note: we do this in the *proc.c in order to ensure that
701 * it works for things like exclusive creates too.
702 */
f044636d
TM		 703void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
704 struct nfs_fattr *fattr)
65e4308d 705{
f044636d
TM		 706 /* Barrier: bump the attribute generation count. */
707 nfs_fattr_set_barrier(fattr);
708
709 spin_lock(&inode->i_lock);
710 NFS_I(inode)->attr_gencount = fattr->gencount;
6a97d02d 711 if ((attr->ia_valid & ATTR_SIZE) != 0) {
4cdfeb64
TM		 712 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME |
713 NFS_INO_INVALID_BLOCKS);
6a97d02d
TM		 714 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
715 nfs_vmtruncate(inode, attr->ia_size);
716 }
65e4308d 717 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
6a97d02d 718 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
1f9f4328
TM		 719 if ((attr->ia_valid & ATTR_KILL_SUID) != 0 &&
720 inode->i_mode & S_ISUID)
721 inode->i_mode &= ~S_ISUID;
4f704d9a 722 if (setattr_should_drop_sgid(&nop_mnt_idmap, inode))
1f9f4328 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)
55e04e9c 734 inode_set_ctime_to_ts(inode, 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)
41d581a9 745 inode_set_atime_to_ts(inode, fattr->atime);
6a97d02d 746 else if (attr->ia_valid & ATTR_ATIME_SET)
41d581a9 747 inode_set_atime_to_ts(inode, attr->ia_atime);
6a97d02d
TM		 748 else
749 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
750
751 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 752 inode_set_ctime_to_ts(inode, 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)
41d581a9 761 inode_set_mtime_to_ts(inode, fattr->mtime);
6a97d02d 762 else if (attr->ia_valid & ATTR_MTIME_SET)
41d581a9 763 inode_set_mtime_to_ts(inode, attr->ia_mtime);
6a97d02d
TM		 764 else
765 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
766
767 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 768 inode_set_ctime_to_ts(inode, 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 |
cded49ba 848 STATX_INO | STATX_SIZE | STATX_BLOCKS |
61a968b4 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
0d72b928 915 generic_fillattr(&nop_mnt_idmap, request_mask, 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 1111 if (list_empty(&nfsi->open_files) &&
3db63daa 1112 nfs_ooo_test(nfsi))
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();
3db63daa
N		 1356 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
1357 nfs_ooo_clear(nfsi);
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 */
55e04e9c 1447 ts = inode_get_ctime(inode);
9e6e70f8
TM		 1448 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1449 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 1450 && timespec64_equal(&ts, &fattr->pre_ctime)) {
55e04e9c 1451 inode_set_ctime_to_ts(inode, fattr->ctime);
27dc1cd3 1452 }
9e6e70f8 1453
41d581a9 1454 ts = inode_get_mtime(inode);
9e6e70f8
TM		 1455 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1456 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 1457 && timespec64_equal(&ts, &fattr->pre_mtime)) {
41d581a9 1458 inode_set_mtime_to_ts(inode, 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
41d581a9 1509 ts = inode_get_mtime(inode);
e86d5a02 1510 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
16e14375 1511 invalid |= NFS_INO_INVALID_MTIME;
ca62b9c3 1512
55e04e9c 1513 ts = inode_get_ctime(inode);
e86d5a02 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
41d581a9 1537 ts = inode_get_atime(inode);
e86d5a02 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
3db63daa
N		 1819static void nfs_ooo_merge(struct nfs_inode *nfsi,
1820 u64 start, u64 end)
1821{
1822 int i, cnt;
1823
1824 if (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER)
1825 /* No point merging anything */
1826 return;
1827
1828 if (!nfsi->ooo) {
1829 nfsi->ooo = kmalloc(sizeof(*nfsi->ooo), GFP_ATOMIC);
1830 if (!nfsi->ooo) {
1831 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1832 return;
1833 }
1834 nfsi->ooo->cnt = 0;
1835 }
1836
1837 /* add this range, merging if possible */
1838 cnt = nfsi->ooo->cnt;
1839 for (i = 0; i < cnt; i++) {
1840 if (end == nfsi->ooo->gap[i].start)
1841 end = nfsi->ooo->gap[i].end;
1842 else if (start == nfsi->ooo->gap[i].end)
1843 start = nfsi->ooo->gap[i].start;
1844 else
1845 continue;
1846 /* Remove 'i' from table and loop to insert the new range */
1847 cnt -= 1;
1848 nfsi->ooo->gap[i] = nfsi->ooo->gap[cnt];
1849 i = -1;
1850 }
1851 if (start != end) {
1852 if (cnt >= ARRAY_SIZE(nfsi->ooo->gap)) {
1853 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1854 kfree(nfsi->ooo);
1855 nfsi->ooo = NULL;
1856 return;
1857 }
1858 nfsi->ooo->gap[cnt].start = start;
1859 nfsi->ooo->gap[cnt].end = end;
1860 cnt += 1;
1861 }
1862 nfsi->ooo->cnt = cnt;
1863}
1864
1865static void nfs_ooo_record(struct nfs_inode *nfsi,
1866 struct nfs_fattr *fattr)
1867{
1868 /* This reply was out-of-order, so record in the
1869 * pre/post change id, possibly cancelling
1870 * gaps created when iversion was jumpped forward.
1871 */
1872 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) &&
1873 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE))
1874 nfs_ooo_merge(nfsi,
1875 fattr->change_attr,
1876 fattr->pre_change_attr);
1877}
1878
6f9be83d
TM		 1879static int nfs_refresh_inode_locked(struct inode *inode,
1880 struct nfs_fattr *fattr)
a10ad176 1881{
6f9be83d
TM		 1882 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
1883 int ret = 0;
f4ce1299
TM		 1884
1885 trace_nfs_refresh_inode_enter(inode);
1886
7b24dacf 1887 if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode))
f4ce1299 1888 ret = nfs_update_inode(inode, fattr);
3db63daa
N		 1889 else {
1890 nfs_ooo_record(NFS_I(inode), fattr);
1891
1892 if (attr_cmp == 0)
1893 ret = nfs_check_inode_attributes(inode, fattr);
1894 }
f4ce1299
TM		 1895
1896 trace_nfs_refresh_inode_exit(inode, ret);
1897 return ret;
870a5be8
TM		 1898}
1899
33801147
TM		 1900/**
1901 * nfs_refresh_inode - try to update the inode attribute cache
302fad7b
TM		 1902 * @inode: pointer to inode
1903 * @fattr: updated attributes
33801147
TM		 1904 *
1905 * Check that an RPC call that returned attributes has not overlapped with
1906 * other recent updates of the inode metadata, then decide whether it is
1907 * safe to do a full update of the inode attributes, or whether just to
1908 * call nfs_check_inode_attributes.
1909 */
1910int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1911{
33801147
TM		 1912 int status;
1913
1914 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1915 return 0;
1916 spin_lock(&inode->i_lock);
870a5be8 1917 status = nfs_refresh_inode_locked(inode, fattr);
33801147 1918 spin_unlock(&inode->i_lock);
ef79c097 1919
33801147
TM		 1920 return status;
1921}
ddda8e0a 1922EXPORT_SYMBOL_GPL(nfs_refresh_inode);
33801147 1923
16e14375
TM		 1924static int nfs_post_op_update_inode_locked(struct inode *inode,
1925 struct nfs_fattr *fattr, unsigned int invalid)
d65f557f 1926{
6edf9609
TM		 1927 if (S_ISDIR(inode->i_mode))
1928 invalid |= NFS_INO_INVALID_DATA;
1929 nfs_set_cache_invalid(inode, invalid);
d65f557f
TM		 1930 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1931 return 0;
1932 return nfs_refresh_inode_locked(inode, fattr);
1933}
1934
decf491f
TM		 1935/**
1936 * nfs_post_op_update_inode - try to update the inode attribute cache
302fad7b
TM		 1937 * @inode: pointer to inode
1938 * @fattr: updated attributes
decf491f
TM		 1939 *
1940 * After an operation that has changed the inode metadata, mark the
1941 * attribute cache as being invalid, then try to update it.
f551e44f
CL		 1942 *
1943 * NB: if the server didn't return any post op attributes, this
1944 * function will force the retrieval of attributes before the next
1945 * NFS request. Thus it should be used only for operations that
1946 * are expected to change one or more attributes, to avoid
1947 * unnecessary NFS requests and trips through nfs_update_inode().
decf491f
TM		 1948 */
1949int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1950{
d65f557f 1951 int status;
decf491f 1952
7668fdbe 1953 spin_lock(&inode->i_lock);
92d64e47 1954 nfs_fattr_set_barrier(fattr);
16e14375
TM		 1955 status = nfs_post_op_update_inode_locked(inode, fattr,
1956 NFS_INO_INVALID_CHANGE
d554168f
TM		 1957 | NFS_INO_INVALID_CTIME
1958 | NFS_INO_REVAL_FORCED);
7668fdbe 1959 spin_unlock(&inode->i_lock);
aa9c2669 1960
870a5be8 1961 return status;
decf491f 1962}
1c606fb7 1963EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
decf491f 1964
70ca8852 1965/**
a08a8cd3 1966 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
302fad7b
TM		 1967 * @inode: pointer to inode
1968 * @fattr: updated attributes
70ca8852
TM		 1969 *
1970 * After an operation that has changed the inode metadata, mark the
1971 * attribute cache as being invalid, then try to update it. Fake up
1972 * weak cache consistency data, if none exist.
1973 *
1974 * This function is mainly designed to be used by the ->write_done() functions.
1975 */
a08a8cd3 1976int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
70ca8852 1977{
6f9be83d 1978 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
d65f557f
TM		 1979 int status;
1980
d65f557f 1981 /* Don't do a WCC update if these attributes are already stale */
6f9be83d
TM		 1982 if (attr_cmp < 0)
1983 return 0;
1984 if ((fattr->valid & NFS_ATTR_FATTR) == 0 || !attr_cmp) {
3db63daa
N		 1985 /* Record the pre/post change info before clearing PRECHANGE */
1986 nfs_ooo_record(NFS_I(inode), fattr);
9e6e70f8
TM		 1987 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1988 | NFS_ATTR_FATTR_PRESIZE
1989 | NFS_ATTR_FATTR_PREMTIME
1990 | NFS_ATTR_FATTR_PRECTIME);
d65f557f
TM		 1991 goto out_noforce;
1992 }
9e6e70f8
TM		 1993 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1994 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1eb5d98f 1995 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
9e6e70f8 1996 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
70ca8852 1997 }
9e6e70f8
TM		 1998 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1999 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
55e04e9c 2000 fattr->pre_ctime = inode_get_ctime(inode);
9e6e70f8
TM		 2001 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
2002 }
2003 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
2004 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
41d581a9 2005 fattr->pre_mtime = inode_get_mtime(inode);
9e6e70f8
TM		 2006 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
2007 }
2008 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
2009 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
a3d01454 2010 fattr->pre_size = i_size_read(inode);
9e6e70f8 2011 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
70ca8852 2012 }
d65f557f 2013out_noforce:
16e14375
TM		 2014 status = nfs_post_op_update_inode_locked(inode, fattr,
2015 NFS_INO_INVALID_CHANGE
2016 | NFS_INO_INVALID_CTIME
3a39e778
ZB		 2017 | NFS_INO_INVALID_MTIME
2018 | NFS_INO_INVALID_BLOCKS);
a08a8cd3
TM		 2019 return status;
2020}
2021
2022/**
2023 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
302fad7b
TM		 2024 * @inode: pointer to inode
2025 * @fattr: updated attributes
a08a8cd3
TM		 2026 *
2027 * After an operation that has changed the inode metadata, mark the
2028 * attribute cache as being invalid, then try to update it. Fake up
2029 * weak cache consistency data, if none exist.
2030 *
2031 * This function is mainly designed to be used by the ->write_done() functions.
2032 */
2033int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
2034{
2035 int status;
2036
2037 spin_lock(&inode->i_lock);
8f8ba1d7 2038 nfs_fattr_set_barrier(fattr);
a08a8cd3 2039 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
d65f557f
TM		 2040 spin_unlock(&inode->i_lock);
2041 return status;
70ca8852 2042}
ddda8e0a 2043EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
70ca8852 2044
ea96d1ec 2045
1da177e4
LT		 2046/*
2047 * Many nfs protocol calls return the new file attributes after
2048 * an operation. Here we update the inode to reflect the state
2049 * of the server's inode.
2050 *
2051 * This is a bit tricky because we have to make sure all dirty pages
2052 * have been sent off to the server before calling invalidate_inode_pages.
2053 * To make sure no other process adds more write requests while we try
2054 * our best to flush them, we make them sleep during the attribute refresh.
2055 *
2056 * A very similar scenario holds for the dir cache.
2057 */
24aa1fe6 2058static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1da177e4 2059{
ce62b114 2060 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2061 struct nfs_inode *nfsi = NFS_I(inode);
951a143b 2062 loff_t cur_isize, new_isize;
ce62b114 2063 u64 fattr_supported = server->fattr_valid;
2a3f5fd4 2064 unsigned long invalid = 0;
3e7d950a 2065 unsigned long now = jiffies;
62ab460c 2066 unsigned long save_cache_validity;
651b0e70 2067 bool have_writers = nfs_file_has_buffered_writers(nfsi);
944171cb 2068 bool cache_revalidated = true;
0b467264 2069 bool attr_changed = false;
c80d17c5 2070 bool have_delegation;
1da177e4 2071
1e8968c5 2072 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
3110ff80 2073 __func__, inode->i_sb->s_id, inode->i_ino,
4f1abd22 2074 nfs_display_fhandle_hash(NFS_FH(inode)),
1da177e4
LT		 2075 atomic_read(&inode->i_count), fattr->valid);
2076
eb3d8f42
TM		 2077 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
2078 /* Only a mounted-on-fileid? Just exit */
2079 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
2080 return 0;
7e10cc25 2081 /* Has the inode gone and changed behind our back? */
eb3d8f42 2082 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 2083 /* Is this perhaps the mounted-on fileid? */
2084 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
2085 nfsi->fileid == fattr->mounted_on_fileid)
2086 return 0;
e73e6c9e
MT		 2087 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
2088 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
2089 NFS_SERVER(inode)->nfs_client->cl_hostname,
2090 inode->i_sb->s_id, (long long)nfsi->fileid,
2091 (long long)fattr->fileid);
2092 goto out_err;
2093 }
1da177e4
LT		 2094
2095 /*
2096 * Make sure the inode's type hasn't changed.
2097 */
6e3e2c43 2098 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) {
e73e6c9e
MT		 2099 /*
2100 * Big trouble! The inode has become a different object.
2101 */
1e8968c5 2102 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
e73e6c9e
MT		 2103 __func__, inode->i_ino, inode->i_mode, fattr->mode);
2104 goto out_err;
2105 }
1da177e4 2106
a0356862 2107 /* Update the fsid? */
9e6e70f8 2108 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
c37dcd33 2109 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
36d43a43 2110 !IS_AUTOMOUNT(inode))
8b4bdcf8
TM		 2111 server->fsid = fattr->fsid;
2112
c80d17c5
TM		 2113 /* Save the delegation state before clearing cache_validity */
2114 have_delegation = nfs_have_delegated_attributes(inode);
2115
1da177e4
LT		 2116 /*
2117 * Update the read time so we don't revalidate too often.
2118 */
33801147 2119 nfsi->read_cache_jiffies = fattr->time_start;
3e7d950a 2120
62ab460c
TM		 2121 save_cache_validity = nfsi->cache_validity;
2122 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
2123 | NFS_INO_INVALID_ATIME
2124 | NFS_INO_REVAL_FORCED
3a39e778 2125 | NFS_INO_INVALID_BLOCKS);
1da177e4 2126
a895b4a1 2127 /* Do atomic weak cache consistency updates */
783b194c 2128 nfs_wcc_update_inode(inode, fattr);
a895b4a1 2129
944171cb 2130 if (pnfs_layoutcommit_outstanding(inode)) {
709fa576
TM		 2131 nfsi->cache_validity |=
2132 save_cache_validity &
2133 (NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |
2134 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
cc7f2dae 2135 NFS_INO_INVALID_BLOCKS);
944171cb
BC		 2136 cache_revalidated = false;
2137 }
10b7e9ad 2138
47aabaa7 2139 /* More cache consistency checks */
9e6e70f8 2140 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
3db63daa
N		 2141 if (!have_writers && nfsi->ooo && nfsi->ooo->cnt == 1 &&
2142 nfsi->ooo->gap[0].end == inode_peek_iversion_raw(inode)) {
2143 /* There is one remaining gap that hasn't been
2144 * merged into iversion - do that now.
2145 */
2146 inode_set_iversion_raw(inode, nfsi->ooo->gap[0].start);
2147 kfree(nfsi->ooo);
2148 nfsi->ooo = NULL;
2149 }
c472c07b 2150 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
38512aa9 2151 /* Could it be a race with writeback? */
c80d17c5 2152 if (!(have_writers || have_delegation)) {
0b467264 2153 invalid |= NFS_INO_INVALID_DATA
38512aa9 2154 | NFS_INO_INVALID_ACCESS
95ad37f9
FL		 2155 | NFS_INO_INVALID_ACL
2156 | NFS_INO_INVALID_XATTR;
cac88f94 2157 /* Force revalidate of all attributes */
16e14375
TM		 2158 save_cache_validity |= NFS_INO_INVALID_CTIME
2159 | NFS_INO_INVALID_MTIME
2160 | NFS_INO_INVALID_SIZE
4cdfeb64 2161 | NFS_INO_INVALID_BLOCKS
fabf2b34 2162 | NFS_INO_INVALID_NLINK
720869eb 2163 | NFS_INO_INVALID_MODE
16e14375 2164 | NFS_INO_INVALID_OTHER;
38512aa9
TM		 2165 if (S_ISDIR(inode->i_mode))
2166 nfs_force_lookup_revalidate(inode);
a9601ac5 2167 attr_changed = true;
c80d17c5
TM		 2168 dprintk("NFS: change_attr change on server for file %s/%ld\n",
2169 inode->i_sb->s_id,
2170 inode->i_ino);
3db63daa
N		 2171 } else if (!have_delegation) {
2172 nfs_ooo_record(nfsi, fattr);
2173 nfs_ooo_merge(nfsi, inode_peek_iversion_raw(inode),
2174 fattr->change_attr);
2175 }
1eb5d98f 2176 inode_set_iversion_raw(inode, fattr->change_attr);
9e6e70f8 2177 }
ade14a7d 2178 } else {
cc7f2dae
TM		 2179 nfsi->cache_validity |=
2180 save_cache_validity & NFS_INO_INVALID_CHANGE;
213bb584
TM		 2181 if (!have_delegation ||
2182 (nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0)
2183 cache_revalidated = false;
ade14a7d 2184 }
9e6e70f8 2185
213bb584 2186 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
41d581a9 2187 inode_set_mtime_to_ts(inode, fattr->mtime);
213bb584 2188 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
cc7f2dae
TM		 2189 nfsi->cache_validity |=
2190 save_cache_validity & NFS_INO_INVALID_MTIME;
62ab460c 2191
213bb584 2192 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
55e04e9c 2193 inode_set_ctime_to_ts(inode, fattr->ctime);
213bb584 2194 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
cc7f2dae
TM		 2195 nfsi->cache_validity |=
2196 save_cache_validity & NFS_INO_INVALID_CTIME;
47aabaa7 2197
951a143b 2198 /* Check if our cached file size is stale */
9e6e70f8
TM		 2199 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
2200 new_isize = nfs_size_to_loff_t(fattr->size);
2201 cur_isize = i_size_read(inode);
c80d17c5 2202 if (new_isize != cur_isize && !have_delegation) {
9e6e70f8
TM		 2203 /* Do we perhaps have any outstanding writes, or has
2204 * the file grown beyond our last write? */
a6b6d5b8 2205 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
110cb2d2 2206 trace_nfs_size_update(inode, new_isize);
9e6e70f8 2207 i_size_write(inode, new_isize);
ca0daa27 2208 if (!have_writers)
16e14375 2209 invalid |= NFS_INO_INVALID_DATA;
9e6e70f8 2210 }
1da177e4 2211 }
4cdfeb64
TM		 2212 if (new_isize == 0 &&
2213 !(fattr->valid & (NFS_ATTR_FATTR_SPACE_USED |
2214 NFS_ATTR_FATTR_BLOCKS_USED))) {
2215 fattr->du.nfs3.used = 0;
2216 fattr->valid |= NFS_ATTR_FATTR_SPACE_USED;
2217 }
213bb584 2218 } else
cc7f2dae
TM		 2219 nfsi->cache_validity |=
2220 save_cache_validity & NFS_INO_INVALID_SIZE;
1da177e4 2221
9e6e70f8 2222 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
41d581a9 2223 inode_set_atime_to_ts(inode, fattr->atime);
213bb584 2224 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
cc7f2dae
TM		 2225 nfsi->cache_validity |=
2226 save_cache_validity & NFS_INO_INVALID_ATIME;
1da177e4 2227
9e6e70f8
TM		 2228 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
2229 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
9b4b3513
TM		 2230 umode_t newmode = inode->i_mode & S_IFMT;
2231 newmode |= fattr->mode & S_IALLUGO;
2232 inode->i_mode = newmode;
16e14375 2233 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2234 | NFS_INO_INVALID_ACL;
9e6e70f8 2235 }
213bb584 2236 } else if (fattr_supported & NFS_ATTR_FATTR_MODE)
cc7f2dae
TM		 2237 nfsi->cache_validity |=
2238 save_cache_validity & NFS_INO_INVALID_MODE;
62ab460c 2239
9e6e70f8 2240 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
9ff593c4 2241 if (!uid_eq(inode->i_uid, fattr->uid)) {
16e14375 2242 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2243 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2244 inode->i_uid = fattr->uid;
2245 }
213bb584 2246 } else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
cc7f2dae
TM		 2247 nfsi->cache_validity |=
2248 save_cache_validity & NFS_INO_INVALID_OTHER;
62ab460c 2249
9e6e70f8 2250 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
9ff593c4 2251 if (!gid_eq(inode->i_gid, fattr->gid)) {
16e14375 2252 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2253 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2254 inode->i_gid = fattr->gid;
2255 }
213bb584 2256 } else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
cc7f2dae
TM		 2257 nfsi->cache_validity |=
2258 save_cache_validity & NFS_INO_INVALID_OTHER;
921615f1 2259
9e6e70f8 2260 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
36a10a3c 2261 if (inode->i_nlink != fattr->nlink)
bfe86848 2262 set_nlink(inode, fattr->nlink);
213bb584 2263 } else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
cc7f2dae
TM		 2264 nfsi->cache_validity |=
2265 save_cache_validity & NFS_INO_INVALID_NLINK;
1da177e4 2266
9e6e70f8 2267 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 2268 /*
2269 * report the blocks in 512byte units
2270 */
2271 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
213bb584 2272 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED)
ce62b114
TM		 2273 nfsi->cache_validity |=
2274 save_cache_validity & NFS_INO_INVALID_BLOCKS;
ce62b114 2275
213bb584 2276 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
9e6e70f8 2277 inode->i_blocks = fattr->du.nfs2.blocks;
213bb584 2278 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED)
cc7f2dae
TM		 2279 nfsi->cache_validity |=
2280 save_cache_validity & NFS_INO_INVALID_BLOCKS;
1da177e4
LT		 2281
2282 /* Update attrtimeo value if we're out of the unstable period */
0b467264 2283 if (attr_changed) {
91d5b470 2284 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1da177e4 2285 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
3e7d950a 2286 nfsi->attrtimeo_timestamp = now;
f5062003 2287 /* Set barrier to be more recent than all outstanding updates */
4704f0e2 2288 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
6d2b2966 2289 } else {
ade14a7d
TM		 2290 if (cache_revalidated) {
2291 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2292 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2293 nfsi->attrtimeo <<= 1;
2294 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2295 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2296 }
6d2b2966
TM		 2297 nfsi->attrtimeo_timestamp = now;
2298 }
f5062003 2299 /* Set the barrier to be more recent than this fattr */
9fdbfad1 2300 if ((long)(fattr->gencount - nfsi->attr_gencount) > 0)
f5062003 2301 nfsi->attr_gencount = fattr->gencount;
1da177e4 2302 }
c812012f 2303
1da177e4
LT		 2304 /* Don't invalidate the data if we were to blame */
2305 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2306 || S_ISLNK(inode->i_mode)))
2307 invalid &= ~NFS_INO_INVALID_DATA;
c80d17c5 2308 nfs_set_cache_invalid(inode, invalid);
de242c0b 2309
1da177e4 2310 return 0;
b37b03b7 2311 out_err:
1da177e4
LT		 2312 /*
2313 * No need to worry about unhashing the dentry, as the
2314 * lookup validation will know that the inode is bad.
2315 * (But we fall through to invalidate the caches.)
2316 */
93ce4af7 2317 nfs_set_inode_stale_locked(inode);
1da177e4
LT		 2318 return -ESTALE;
2319}
2320
f7b422b1 2321struct inode *nfs_alloc_inode(struct super_block *sb)
1da177e4
LT		 2322{
2323 struct nfs_inode *nfsi;
fd60b288 2324 nfsi = alloc_inode_sb(sb, nfs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 2325 if (!nfsi)
2326 return NULL;
55296809
CL		 2327 nfsi->flags = 0UL;
2328 nfsi->cache_validity = 0UL;
3db63daa 2329 nfsi->ooo = NULL;
89d77c8f 2330#if IS_ENABLED(CONFIG_NFS_V4)
e50a1c2e
BF		 2331 nfsi->nfs4_acl = NULL;
2332#endif /* CONFIG_NFS_V4 */
95ad37f9
FL		 2333#ifdef CONFIG_NFS_V4_2
2334 nfsi->xattr_cache = NULL;
2335#endif
000dbe0b
DW		 2336 nfs_netfs_inode_init(nfsi);
2337
1da177e4
LT		 2338 return &nfsi->vfs_inode;
2339}
89d77c8f 2340EXPORT_SYMBOL_GPL(nfs_alloc_inode);
1da177e4 2341
ca1a199e 2342void nfs_free_inode(struct inode *inode)
1da177e4 2343{
3db63daa 2344 kfree(NFS_I(inode)->ooo);
1da177e4
LT		 2345 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2346}
ca1a199e 2347EXPORT_SYMBOL_GPL(nfs_free_inode);
fa0d7e3d 2348
d75d5414
AM		 2349static inline void nfs4_init_once(struct nfs_inode *nfsi)
2350{
89d77c8f 2351#if IS_ENABLED(CONFIG_NFS_V4)
d75d5414
AM		 2352 INIT_LIST_HEAD(&nfsi->open_states);
2353 nfsi->delegation = NULL;
d75d5414 2354 init_rwsem(&nfsi->rwsem);
e5e94017 2355 nfsi->layout = NULL;
d75d5414
AM		 2356#endif
2357}
f7b422b1 2358
51cc5068 2359static void init_once(void *foo)
1da177e4 2360{
7e7ce2cc 2361 struct nfs_inode *nfsi = foo;
1da177e4 2362
a35afb83 2363 inode_init_once(&nfsi->vfs_inode);
a35afb83
CL		 2364 INIT_LIST_HEAD(&nfsi->open_files);
2365 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2366 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
a35afb83 2367 nfs4_init_once(nfsi);
1da177e4 2368}
20c2df83 2369
f7b422b1 2370static int __init nfs_init_inodecache(void)
1da177e4
LT		 2371{
2372 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2373 sizeof(struct nfs_inode),
fffb60f9 2374 0, (SLAB_RECLAIM_ACCOUNT|
f88c3fb8 2375 SLAB_ACCOUNT),
20c2df83 2376 init_once);
1da177e4
LT		 2377 if (nfs_inode_cachep == NULL)
2378 return -ENOMEM;
2379
2380 return 0;
2381}
2382
266bee88 2383static void nfs_destroy_inodecache(void)
1da177e4 2384{
8c0a8537
KS		 2385 /*
2386 * Make sure all delayed rcu free inodes are flushed before we
2387 * destroy cache.
2388 */
2389 rcu_barrier();
1a1d92c1 2390 kmem_cache_destroy(nfs_inode_cachep);
1da177e4
LT		 2391}
2392
5746006f 2393struct workqueue_struct *nfsiod_workqueue;
89d77c8f 2394EXPORT_SYMBOL_GPL(nfsiod_workqueue);
5746006f
TM		 2395
2396/*
2397 * start up the nfsiod workqueue
2398 */
2399static int nfsiod_start(void)
2400{
2401 struct workqueue_struct *wq;
2402 dprintk("RPC: creating workqueue nfsiod\n");
bf701b76 2403 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
5746006f
TM		 2404 if (wq == NULL)
2405 return -ENOMEM;
2406 nfsiod_workqueue = wq;
2407 return 0;
2408}
2409
2410/*
2411 * Destroy the nfsiod workqueue
2412 */
2413static void nfsiod_stop(void)
2414{
2415 struct workqueue_struct *wq;
2416
2417 wq = nfsiod_workqueue;
2418 if (wq == NULL)
2419 return;
2420 nfsiod_workqueue = NULL;
2421 destroy_workqueue(wq);
2422}
2423
c7d03a00 2424unsigned int nfs_net_id;
9e2e74db 2425EXPORT_SYMBOL_GPL(nfs_net_id);
1b340d01
SK		 2426
2427static int nfs_net_init(struct net *net)
2428{
1548036e
JB		 2429 struct nfs_net *nn = net_generic(net, nfs_net_id);
2430
6b13168b 2431 nfs_clients_init(net);
24457f1b
KI		 2432
2433 if (!rpc_proc_register(net, &nn->rpcstats)) {
2434 nfs_clients_exit(net);
2435 return -ENOMEM;
2436 }
2437
65b38851 2438 return nfs_fs_proc_net_init(net);
1b340d01
SK		 2439}
2440
2441static void nfs_net_exit(struct net *net)
2442{
d47151b7 2443 rpc_proc_unregister(net, "nfs");
65b38851 2444 nfs_fs_proc_net_exit(net);
10b7a70c 2445 nfs_clients_exit(net);
1b340d01
SK		 2446}
2447
2448static struct pernet_operations nfs_net_ops = {
2449 .init = nfs_net_init,
2450 .exit = nfs_net_exit,
2451 .id = &nfs_net_id,
2452 .size = sizeof(struct nfs_net),
2453};
2454
1da177e4
LT		 2455/*
2456 * Initialize NFS
2457 */
2458static int __init init_nfs_fs(void)
2459{
2460 int err;
2461
996bc4f4
TM		 2462 err = nfs_sysfs_init();
2463 if (err < 0)
2464 goto out10;
2465
1b340d01 2466 err = register_pernet_subsys(&nfs_net_ops);
e571cbf1 2467 if (err < 0)
89d77c8f 2468 goto out9;
e571cbf1 2469
5746006f
TM		 2470 err = nfsiod_start();
2471 if (err)
89d77c8f 2472 goto out7;
5746006f 2473
6aaca566
DH		 2474 err = nfs_fs_proc_init();
2475 if (err)
89d77c8f 2476 goto out6;
6aaca566 2477
1da177e4
LT		 2478 err = nfs_init_nfspagecache();
2479 if (err)
89d77c8f 2480 goto out5;
1da177e4
LT		 2481
2482 err = nfs_init_inodecache();
2483 if (err)
89d77c8f 2484 goto out4;
1da177e4
LT		 2485
2486 err = nfs_init_readpagecache();
2487 if (err)
89d77c8f 2488 goto out3;
1da177e4
LT		 2489
2490 err = nfs_init_writepagecache();
2491 if (err)
89d77c8f 2492 goto out2;
1da177e4 2493
1da177e4
LT		 2494 err = nfs_init_directcache();
2495 if (err)
89d77c8f 2496 goto out1;
1da177e4 2497
cd738ee9
KM		 2498 err = register_nfs_fs();
2499 if (err)
129d1977
BS		 2500 goto out0;
2501
1da177e4 2502 return 0;
129d1977 2503out0:
1da177e4 2504 nfs_destroy_directcache();
89d77c8f 2505out1:
129d1977 2506 nfs_destroy_writepagecache();
89d77c8f 2507out2:
129d1977 2508 nfs_destroy_readpagecache();
89d77c8f 2509out3:
129d1977 2510 nfs_destroy_inodecache();
89d77c8f 2511out4:
129d1977 2512 nfs_destroy_nfspagecache();
89d77c8f 2513out5:
129d1977 2514 nfs_fs_proc_exit();
89d77c8f 2515out6:
129d1977 2516 nfsiod_stop();
89d77c8f 2517out7:
129d1977 2518 unregister_pernet_subsys(&nfs_net_ops);
89d77c8f 2519out9:
996bc4f4
TM		 2520 nfs_sysfs_exit();
2521out10:
1da177e4
LT		 2522 return err;
2523}
2524
2525static void __exit exit_nfs_fs(void)
2526{
1da177e4 2527 nfs_destroy_directcache();
1da177e4
LT		 2528 nfs_destroy_writepagecache();
2529 nfs_destroy_readpagecache();
2530 nfs_destroy_inodecache();
2531 nfs_destroy_nfspagecache();
1b340d01 2532 unregister_pernet_subsys(&nfs_net_ops);
f7b422b1 2533 unregister_nfs_fs();
6aaca566 2534 nfs_fs_proc_exit();
5746006f 2535 nfsiod_stop();
996bc4f4 2536 nfs_sysfs_exit();
1da177e4
LT		 2537}
2538
2539/* Not quite true; I just maintain it */
2540MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2541MODULE_LICENSE("GPL");
f43bf0be 2542module_param(enable_ino64, bool, 0644);
1da177e4
LT		 2543
2544module_init(init_nfs_fs)
2545module_exit(exit_nfs_fs)
Linux 6.x block layer and io_uring tree(s)