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NFS: Label the dentry with a verifier in nfs_rmdir() and nfs_unlink()
[linux-2.6-block.git] / fs / nfs / inode.c
CommitLineData
09c434b8 1// SPDX-License-Identifier: GPL-2.0-only
1da177e4
LT		 2/*
3 * linux/fs/nfs/inode.c
4 *
5 * Copyright (C) 1992 Rick Sladkey
6 *
7 * nfs inode and superblock handling functions
8 *
526719ba 9 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
1da177e4
LT		 10 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
11 *
12 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
13 * J.S.Peatfield@damtp.cam.ac.uk
14 *
15 */
16
1da177e4
LT		 17#include <linux/module.h>
18#include <linux/init.h>
174cd4b1 19#include <linux/sched/signal.h>
1da177e4
LT		 20#include <linux/time.h>
21#include <linux/kernel.h>
22#include <linux/mm.h>
23#include <linux/string.h>
24#include <linux/stat.h>
25#include <linux/errno.h>
26#include <linux/unistd.h>
27#include <linux/sunrpc/clnt.h>
28#include <linux/sunrpc/stats.h>
4ece3a2d 29#include <linux/sunrpc/metrics.h>
1da177e4
LT		 30#include <linux/nfs_fs.h>
31#include <linux/nfs_mount.h>
32#include <linux/nfs4_mount.h>
33#include <linux/lockd/bind.h>
1da177e4
LT		 34#include <linux/seq_file.h>
35#include <linux/mount.h>
1da177e4 36#include <linux/vfs.h>
9cdb3883
MN		 37#include <linux/inet.h>
38#include <linux/nfs_xdr.h>
5a0e3ad6 39#include <linux/slab.h>
3fa0b4e2 40#include <linux/compat.h>
d310310c 41#include <linux/freezer.h>
7c0f6ba6 42#include <linux/uaccess.h>
1eb5d98f 43#include <linux/iversion.h>
1da177e4 44
4ce79717 45#include "nfs4_fs.h"
a72b4422 46#include "callback.h"
1da177e4 47#include "delegation.h"
d9ef5a8c 48#include "iostat.h"
f7b422b1 49#include "internal.h"
8ec442ae 50#include "fscache.h"
e5e94017 51#include "pnfs.h"
ab7017a3 52#include "nfs.h"
1b340d01 53#include "netns.h"
996bc4f4 54#include "sysfs.h"
1da177e4 55
f4ce1299
TM		 56#include "nfstrace.h"
57
1da177e4 58#define NFSDBG_FACILITY NFSDBG_VFS
1da177e4 59
f43bf0be
TM		 60#define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
61
62/* Default is to see 64-bit inode numbers */
90ab5ee9 63static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
f43bf0be 64
24aa1fe6 65static int nfs_update_inode(struct inode *, struct nfs_fattr *);
1da177e4 66
e18b890b 67static struct kmem_cache * nfs_inode_cachep;
b7fa0554 68
1da177e4
LT		 69static inline unsigned long
70nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
71{
72 return nfs_fileid_to_ino_t(fattr->fileid);
73}
74
210c7c17 75static int nfs_wait_killable(int mode)
72cb77f4 76{
416ad3c9 77 freezable_schedule_unsafe();
dfd01f02
PZ		 78 if (signal_pending_state(mode, current))
79 return -ERESTARTSYS;
72cb77f4
TM		 80 return 0;
81}
210c7c17
BC		 82
83int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
84{
85 return nfs_wait_killable(mode);
86}
89d77c8f 87EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
72cb77f4 88
f43bf0be
TM		 89/**
90 * nfs_compat_user_ino64 - returns the user-visible inode number
91 * @fileid: 64-bit fileid
92 *
93 * This function returns a 32-bit inode number if the boot parameter
94 * nfs.enable_ino64 is zero.
95 */
96u64 nfs_compat_user_ino64(u64 fileid)
97{
3fa0b4e2
FF		 98#ifdef CONFIG_COMPAT
99 compat_ulong_t ino;
100#else
101 unsigned long ino;
102#endif
f43bf0be
TM		 103
104 if (enable_ino64)
105 return fileid;
106 ino = fileid;
107 if (sizeof(ino) < sizeof(fileid))
108 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
109 return ino;
110}
111
eed99357
TM		 112int nfs_drop_inode(struct inode *inode)
113{
114 return NFS_STALE(inode) || generic_drop_inode(inode);
115}
116EXPORT_SYMBOL_GPL(nfs_drop_inode);
117
19d87ca3 118void nfs_clear_inode(struct inode *inode)
1da177e4 119{
da6d503a
TM		 120 /*
121 * The following should never happen...
122 */
f48407dd
TM		 123 WARN_ON_ONCE(nfs_have_writebacks(inode));
124 WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
ada70d94 125 nfs_zap_acl_cache(inode);
1c3c07e9 126 nfs_access_zap_cache(inode);
f1fe29b4 127 nfs_fscache_clear_inode(inode);
1da177e4 128}
89d77c8f 129EXPORT_SYMBOL_GPL(nfs_clear_inode);
1da177e4 130
b57922d9
AV		 131void nfs_evict_inode(struct inode *inode)
132{
91b0abe3 133 truncate_inode_pages_final(&inode->i_data);
dbd5768f 134 clear_inode(inode);
b57922d9
AV		 135 nfs_clear_inode(inode);
136}
137
9e1681c2 138int nfs_sync_inode(struct inode *inode)
4d346bea 139{
95d9f6c3 140 inode_dio_wait(inode);
4d346bea
TM		 141 return nfs_wb_all(inode);
142}
9e1681c2 143EXPORT_SYMBOL_GPL(nfs_sync_inode);
4d346bea 144
29884df0
TM		 145/**
146 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
302fad7b 147 * @mapping: pointer to struct address_space
29884df0
TM		 148 */
149int nfs_sync_mapping(struct address_space *mapping)
150{
5cf95214 151 int ret = 0;
29884df0 152
5cf95214
TM		 153 if (mapping->nrpages != 0) {
154 unmap_mapping_range(mapping, 0, 0, 0);
155 ret = nfs_wb_all(mapping->host);
156 }
29884df0
TM		 157 return ret;
158}
159
187e593d
TM		 160static int nfs_attribute_timeout(struct inode *inode)
161{
162 struct nfs_inode *nfsi = NFS_I(inode);
163
164 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
165}
166
13c0b082
TM		 167static bool nfs_check_cache_flags_invalid(struct inode *inode,
168 unsigned long flags)
61540bf6
TM		 169{
170 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
171
61540bf6
TM		 172 return (cache_validity & flags) != 0;
173}
174
61540bf6
TM		 175bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
176{
13c0b082
TM		 177 if (nfs_check_cache_flags_invalid(inode, flags))
178 return true;
179 return nfs_attribute_cache_expired(inode);
61540bf6 180}
95ad37f9 181EXPORT_SYMBOL_GPL(nfs_check_cache_invalid);
61540bf6 182
848fdd62
TM		 183#ifdef CONFIG_NFS_V4_2
184static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
185{
186 return nfsi->xattr_cache != NULL;
187}
188#else
189static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
190{
191 return false;
192}
193#endif
194
fd6d3fee 195void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
6edf9609
TM		 196{
197 struct nfs_inode *nfsi = NFS_I(inode);
3f0b3cf4
TM		 198 bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
199
200 if (have_delegation) {
201 if (!(flags & NFS_INO_REVAL_FORCED))
720869eb 202 flags &= ~(NFS_INO_INVALID_MODE |
cc7f2dae
TM		 203 NFS_INO_INVALID_OTHER |
204 NFS_INO_INVALID_XATTR);
205 flags &= ~(NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
50c7a799
TM		 206 } else if (flags & NFS_INO_REVAL_PAGECACHE)
207 flags |= NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE;
6edf9609 208
848fdd62
TM		 209 if (!nfs_has_xattr_cache(nfsi))
210 flags &= ~NFS_INO_INVALID_XATTR;
beab450d
TM		 211 if (flags & NFS_INO_INVALID_DATA)
212 nfs_fscache_invalidate(inode);
6edf9609 213 if (inode->i_mapping->nrpages == 0)
1c341b77 214 flags &= ~(NFS_INO_INVALID_DATA|NFS_INO_DATA_INVAL_DEFER);
cc7f2dae 215 flags &= ~(NFS_INO_REVAL_PAGECACHE | NFS_INO_REVAL_FORCED);
6edf9609 216 nfsi->cache_validity |= flags;
6edf9609 217}
b6f80a2e 218EXPORT_SYMBOL_GPL(nfs_set_cache_invalid);
6edf9609 219
1da177e4
LT		 220/*
221 * Invalidate the local caches
222 */
b37b03b7 223static void nfs_zap_caches_locked(struct inode *inode)
1da177e4
LT		 224{
225 struct nfs_inode *nfsi = NFS_I(inode);
226 int mode = inode->i_mode;
227
91d5b470
CL		 228 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
229
c7c20973
TM		 230 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
231 nfsi->attrtimeo_timestamp = jiffies;
1da177e4 232
de242c0b 233 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
6edf9609 234 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
aa9c2669
DQ		 235 | NFS_INO_INVALID_DATA
236 | NFS_INO_INVALID_ACCESS
237 | NFS_INO_INVALID_ACL
95ad37f9 238 | NFS_INO_INVALID_XATTR
6edf9609 239 | NFS_INO_REVAL_PAGECACHE);
aa9c2669 240 } else
6edf9609 241 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
aa9c2669
DQ		 242 | NFS_INO_INVALID_ACCESS
243 | NFS_INO_INVALID_ACL
95ad37f9 244 | NFS_INO_INVALID_XATTR
6edf9609 245 | NFS_INO_REVAL_PAGECACHE);
fd1defc2 246 nfs_zap_label_cache_locked(nfsi);
b37b03b7 247}
dc59250c 248
b37b03b7
TM		 249void nfs_zap_caches(struct inode *inode)
250{
251 spin_lock(&inode->i_lock);
252 nfs_zap_caches_locked(inode);
dc59250c 253 spin_unlock(&inode->i_lock);
ada70d94
TM		 254}
255
cd9ae2b6
TM		 256void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
257{
258 if (mapping->nrpages != 0) {
259 spin_lock(&inode->i_lock);
6edf9609 260 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
cd9ae2b6
TM		 261 spin_unlock(&inode->i_lock);
262 }
263}
264
f41f7418 265void nfs_zap_acl_cache(struct inode *inode)
ada70d94
TM		 266{
267 void (*clear_acl_cache)(struct inode *);
268
269 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
270 if (clear_acl_cache != NULL)
271 clear_acl_cache(inode);
dc59250c 272 spin_lock(&inode->i_lock);
55296809 273 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
dc59250c 274 spin_unlock(&inode->i_lock);
1da177e4 275}
1c606fb7 276EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
1da177e4 277
c4812998
TM		 278void nfs_invalidate_atime(struct inode *inode)
279{
280 spin_lock(&inode->i_lock);
6edf9609 281 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
c4812998
TM		 282 spin_unlock(&inode->i_lock);
283}
ddda8e0a 284EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
c4812998 285
1da177e4 286/*
b37b03b7
TM		 287 * Invalidate, but do not unhash, the inode.
288 * NB: must be called with inode->i_lock held!
1da177e4 289 */
93ce4af7 290static void nfs_set_inode_stale_locked(struct inode *inode)
1da177e4 291{
3a10c30a 292 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
b37b03b7 293 nfs_zap_caches_locked(inode);
93ce4af7
TM		 294 trace_nfs_set_inode_stale(inode);
295}
296
297void nfs_set_inode_stale(struct inode *inode)
298{
299 spin_lock(&inode->i_lock);
300 nfs_set_inode_stale_locked(inode);
301 spin_unlock(&inode->i_lock);
1da177e4
LT		 302}
303
304struct nfs_find_desc {
305 struct nfs_fh *fh;
306 struct nfs_fattr *fattr;
307};
308
309/*
310 * In NFSv3 we can have 64bit inode numbers. In order to support
311 * this, and re-exported directories (also seen in NFSv2)
312 * we are forced to allow 2 different inodes to have the same
313 * i_ino.
314 */
315static int
316nfs_find_actor(struct inode *inode, void *opaque)
317{
318 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
319 struct nfs_fh *fh = desc->fh;
320 struct nfs_fattr *fattr = desc->fattr;
321
322 if (NFS_FILEID(inode) != fattr->fileid)
323 return 0;
6e3e2c43 324 if (inode_wrong_type(inode, fattr->mode))
f6488c9b 325 return 0;
1da177e4
LT		 326 if (nfs_compare_fh(NFS_FH(inode), fh))
327 return 0;
328 if (is_bad_inode(inode) || NFS_STALE(inode))
329 return 0;
330 return 1;
331}
332
333static int
334nfs_init_locked(struct inode *inode, void *opaque)
335{
336 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
337 struct nfs_fattr *fattr = desc->fattr;
338
99fadcd7 339 set_nfs_fileid(inode, fattr->fileid);
916ec34d 340 inode->i_mode = fattr->mode;
1da177e4
LT		 341 nfs_copy_fh(NFS_FH(inode), desc->fh);
342 return 0;
343}
344
e058f70b 345#ifdef CONFIG_NFS_V4_SECURITY_LABEL
fd1defc2
TM		 346static void nfs_clear_label_invalid(struct inode *inode)
347{
348 spin_lock(&inode->i_lock);
349 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
350 spin_unlock(&inode->i_lock);
351}
352
aa9c2669
DQ		 353void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
354 struct nfs4_label *label)
355{
356 int error;
357
358 if (label == NULL)
359 return;
360
aa9c2669
DQ		 361 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
362 error = security_inode_notifysecctx(inode, label->label,
363 label->len);
364 if (error)
365 printk(KERN_ERR "%s() %s %d "
366 "security_inode_notifysecctx() %d\n",
367 __func__,
368 (char *)label->label,
369 label->len, error);
fd1defc2 370 nfs_clear_label_invalid(inode);
aa9c2669
DQ		 371 }
372}
373
e058f70b
SD		 374struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
375{
376 struct nfs4_label *label = NULL;
377 int minor_version = server->nfs_client->cl_minorversion;
378
379 if (minor_version < 2)
380 return label;
381
382 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
383 return label;
384
385 label = kzalloc(sizeof(struct nfs4_label), flags);
386 if (label == NULL)
387 return ERR_PTR(-ENOMEM);
388
389 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
390 if (label->label == NULL) {
391 kfree(label);
392 return ERR_PTR(-ENOMEM);
393 }
394 label->len = NFS4_MAXLABELLEN;
395
396 return label;
397}
398EXPORT_SYMBOL_GPL(nfs4_label_alloc);
aa9c2669 399#else
829e57d7 400void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
aa9c2669
DQ		 401 struct nfs4_label *label)
402{
403}
e058f70b 404#endif
aa9c2669 405EXPORT_SYMBOL_GPL(nfs_setsecurity);
e058f70b 406
f174ff7a
PT		 407/* Search for inode identified by fh, fileid and i_mode in inode cache. */
408struct inode *
409nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
410{
411 struct nfs_find_desc desc = {
412 .fh = fh,
413 .fattr = fattr,
414 };
415 struct inode *inode;
416 unsigned long hash;
417
418 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
419 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
420 return NULL;
421
422 hash = nfs_fattr_to_ino_t(fattr);
423 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
424
425 dprintk("%s: returning %p\n", __func__, inode);
426 return inode;
427}
428
1da177e4
LT		 429/*
430 * This is our front-end to iget that looks up inodes by file handle
431 * instead of inode number.
432 */
433struct inode *
1775fd3e 434nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 435{
436 struct nfs_find_desc desc = {
437 .fh = fh,
438 .fattr = fattr
439 };
03f28e3a 440 struct inode *inode = ERR_PTR(-ENOENT);
ce62b114 441 u64 fattr_supported = NFS_SB(sb)->fattr_valid;
1da177e4
LT		 442 unsigned long hash;
443
7ebb9315
BS		 444 nfs_attr_check_mountpoint(sb, fattr);
445
2ef47eb1
AS		 446 if (nfs_attr_use_mounted_on_fileid(fattr))
447 fattr->fileid = fattr->mounted_on_fileid;
448 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
1da177e4 449 goto out_no_inode;
9e6e70f8 450 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
1da177e4 451 goto out_no_inode;
1da177e4
LT		 452
453 hash = nfs_fattr_to_ino_t(fattr);
454
03f28e3a
TM		 455 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
456 if (inode == NULL) {
457 inode = ERR_PTR(-ENOMEM);
1da177e4 458 goto out_no_inode;
03f28e3a 459 }
1da177e4
LT		 460
461 if (inode->i_state & I_NEW) {
462 struct nfs_inode *nfsi = NFS_I(inode);
b0c4fddc 463 unsigned long now = jiffies;
1da177e4
LT		 464
465 /* We set i_ino for the few things that still rely on it,
466 * such as stat(2) */
467 inode->i_ino = hash;
468
469 /* We can't support update_atime(), since the server will reset it */
470 inode->i_flags |= S_NOATIME|S_NOCMTIME;
471 inode->i_mode = fattr->mode;
821a868a 472 nfsi->cache_validity = 0;
62ab460c 473 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
ce62b114 474 && (fattr_supported & NFS_ATTR_FATTR_MODE))
720869eb 475 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MODE);
1da177e4
LT		 476 /* Why so? Because we want revalidate for devices/FIFOs, and
477 * that's precisely what we have in nfs_file_inode_operations.
478 */
8fa5c000 479 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
1da177e4 480 if (S_ISREG(inode->i_mode)) {
1788ea6e 481 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
1da177e4 482 inode->i_data.a_ops = &nfs_file_aops;
1da177e4 483 } else if (S_ISDIR(inode->i_mode)) {
8fa5c000 484 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
1da177e4 485 inode->i_fop = &nfs_dir_operations;
11de3b11 486 inode->i_data.a_ops = &nfs_dir_aops;
55a97593 487 /* Deal with crossing mountpoints */
7ebb9315
BS		 488 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
489 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
6b97fd3d
MN		 490 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
491 inode->i_op = &nfs_referral_inode_operations;
492 else
493 inode->i_op = &nfs_mountpoint_inode_operations;
55a97593 494 inode->i_fop = NULL;
36d43a43 495 inode->i_flags |= S_AUTOMOUNT;
55a97593 496 }
21fc61c7 497 } else if (S_ISLNK(inode->i_mode)) {
1da177e4 498 inode->i_op = &nfs_symlink_inode_operations;
21fc61c7
AV		 499 inode_nohighmem(inode);
500 } else
1da177e4
LT		 501 init_special_inode(inode, inode->i_mode, fattr->rdev);
502
9e6e70f8
TM		 503 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
504 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
505 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
1eb5d98f 506 inode_set_iversion_raw(inode, 0);
9e6e70f8 507 inode->i_size = 0;
6d6b77f1 508 clear_nlink(inode);
9ff593c4
EB		 509 inode->i_uid = make_kuid(&init_user_ns, -2);
510 inode->i_gid = make_kgid(&init_user_ns, -2);
9e6e70f8
TM		 511 inode->i_blocks = 0;
512 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
2701d086
AA		 513 nfsi->write_io = 0;
514 nfsi->read_io = 0;
9e6e70f8 515
33801147 516 nfsi->read_cache_jiffies = fattr->time_start;
4704f0e2 517 nfsi->attr_gencount = fattr->gencount;
9e6e70f8 518 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 519 inode->i_atime = fattr->atime;
ce62b114 520 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
16e14375 521 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
9e6e70f8 522 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 523 inode->i_mtime = fattr->mtime;
ce62b114 524 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
16e14375 525 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
9e6e70f8 526 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 527 inode->i_ctime = fattr->ctime;
ce62b114 528 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
16e14375 529 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
9e6e70f8 530 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1eb5d98f 531 inode_set_iversion_raw(inode, fattr->change_attr);
cd812599 532 else
16e14375 533 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
9e6e70f8
TM		 534 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
535 inode->i_size = nfs_size_to_loff_t(fattr->size);
62ab460c 536 else
16e14375 537 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
9e6e70f8 538 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
bfe86848 539 set_nlink(inode, fattr->nlink);
ce62b114 540 else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
fabf2b34 541 nfs_set_cache_invalid(inode, NFS_INO_INVALID_NLINK);
9e6e70f8
TM		 542 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
543 inode->i_uid = fattr->uid;
ce62b114 544 else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
16e14375 545 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
9e6e70f8
TM		 546 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
547 inode->i_gid = fattr->gid;
ce62b114 548 else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
16e14375 549 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
0f44da51
FL		 550 if (nfs_server_capable(inode, NFS_CAP_XATTR))
551 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
9e6e70f8
TM		 552 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
553 inode->i_blocks = fattr->du.nfs2.blocks;
ce62b114
TM		 554 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED &&
555 fattr->size != 0)
556 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
9e6e70f8 557 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 558 /*
559 * report the blocks in 512byte units
560 */
561 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
ce62b114
TM		 562 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED &&
563 fattr->size != 0)
4cdfeb64 564 nfs_set_cache_invalid(inode, NFS_INO_INVALID_BLOCKS);
821a868a 565
aa9c2669
DQ		 566 nfs_setsecurity(inode, fattr, label);
567
1da177e4 568 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
b0c4fddc 569 nfsi->attrtimeo_timestamp = now;
1c3c07e9 570 nfsi->access_cache = RB_ROOT;
1da177e4 571
f1fe29b4 572 nfs_fscache_init_inode(inode);
ef79c097 573
1da177e4 574 unlock_new_inode(inode);
26fde4df
N		 575 } else {
576 int err = nfs_refresh_inode(inode, fattr);
577 if (err < 0) {
578 iput(inode);
579 inode = ERR_PTR(err);
580 goto out_no_inode;
581 }
582 }
1e8968c5 583 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
1da177e4 584 inode->i_sb->s_id,
1e8968c5 585 (unsigned long long)NFS_FILEID(inode),
4f1abd22 586 nfs_display_fhandle_hash(fh),
1da177e4
LT		 587 atomic_read(&inode->i_count));
588
589out:
590 return inode;
591
592out_no_inode:
03f28e3a 593 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
1da177e4
LT		 594 goto out;
595}
89d77c8f 596EXPORT_SYMBOL_GPL(nfs_fhget);
1da177e4 597
536e43d1 598#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		 599
600int
549c7297
CB		 601nfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
602 struct iattr *attr)
1da177e4 603{
2b0143b5 604 struct inode *inode = d_inode(dentry);
987f8dfc 605 struct nfs_fattr *fattr;
ae57ca0f 606 int error = 0;
1da177e4 607
91d5b470
CL		 608 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
609
188b95dd
JL		 610 /* skip mode change if it's just for clearing setuid/setgid */
611 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
612 attr->ia_valid &= ~ATTR_MODE;
613
1da177e4 614 if (attr->ia_valid & ATTR_SIZE) {
08a899d5
CH		 615 BUG_ON(!S_ISREG(inode->i_mode));
616
ae57ca0f
KM		 617 error = inode_newsize_ok(inode, attr->ia_size);
618 if (error)
619 return error;
620
621 if (attr->ia_size == i_size_read(inode))
1da177e4
LT		 622 attr->ia_valid &= ~ATTR_SIZE;
623 }
624
625 /* Optimization: if the end result is no change, don't RPC */
1f9f4328 626 if (((attr->ia_valid & NFS_VALID_ATTRS) & ~(ATTR_FILE|ATTR_OPEN)) == 0)
1da177e4
LT		 627 return 0;
628
f4ce1299
TM		 629 trace_nfs_setattr_enter(inode);
630
755c1e20 631 /* Write all dirty data */
4d346bea
TM		 632 if (S_ISREG(inode->i_mode))
633 nfs_sync_inode(inode);
987f8dfc
TM		 634
635 fattr = nfs_alloc_fattr();
ae57ca0f
KM		 636 if (fattr == NULL) {
637 error = -ENOMEM;
987f8dfc 638 goto out;
ae57ca0f
KM		 639 }
640
987f8dfc 641 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
65e4308d 642 if (error == 0)
aa9c2669 643 error = nfs_refresh_inode(inode, fattr);
987f8dfc
TM		 644 nfs_free_fattr(fattr);
645out:
f4ce1299 646 trace_nfs_setattr_exit(inode, error);
65e4308d
TM		 647 return error;
648}
ddda8e0a 649EXPORT_SYMBOL_GPL(nfs_setattr);
65e4308d 650
a3d01454
TM		 651/**
652 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
653 * @inode: inode of the file used
654 * @offset: file offset to start truncating
655 *
656 * This is a copy of the common vmtruncate, but with the locking
657 * corrected to take into account the fact that NFS requires
658 * inode->i_size to be updated under the inode->i_lock.
f044636d 659 * Note: must be called with inode->i_lock held!
a3d01454
TM		 660 */
661static int nfs_vmtruncate(struct inode * inode, loff_t offset)
662{
c08d3b0e 663 int err;
a3d01454 664
c08d3b0e 665 err = inode_newsize_ok(inode, offset);
666 if (err)
667 goto out;
a3d01454 668
c08d3b0e 669 i_size_write(inode, offset);
6edf9609
TM		 670 /* Optimisation */
671 if (offset == 0)
1c341b77
TM		 672 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA |
673 NFS_INO_DATA_INVAL_DEFER);
f6cdfa6d 674 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
c08d3b0e 675
f044636d 676 spin_unlock(&inode->i_lock);
7caef267 677 truncate_pagecache(inode, offset);
f044636d 678 spin_lock(&inode->i_lock);
c08d3b0e 679out:
680 return err;
a3d01454
TM		 681}
682
65e4308d
TM		 683/**
684 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
685 * @inode: pointer to struct inode
686 * @attr: pointer to struct iattr
16e14375 687 * @fattr: pointer to struct nfs_fattr
65e4308d
TM		 688 *
689 * Note: we do this in the *proc.c in order to ensure that
690 * it works for things like exclusive creates too.
691 */
f044636d
TM		 692void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
693 struct nfs_fattr *fattr)
65e4308d 694{
f044636d
TM		 695 /* Barrier: bump the attribute generation count. */
696 nfs_fattr_set_barrier(fattr);
697
698 spin_lock(&inode->i_lock);
699 NFS_I(inode)->attr_gencount = fattr->gencount;
6a97d02d 700 if ((attr->ia_valid & ATTR_SIZE) != 0) {
4cdfeb64
TM		 701 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME |
702 NFS_INO_INVALID_BLOCKS);
6a97d02d
TM		 703 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
704 nfs_vmtruncate(inode, attr->ia_size);
705 }
65e4308d 706 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
6a97d02d 707 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
1f9f4328
TM		 708 if ((attr->ia_valid & ATTR_KILL_SUID) != 0 &&
709 inode->i_mode & S_ISUID)
710 inode->i_mode &= ~S_ISUID;
711 if ((attr->ia_valid & ATTR_KILL_SGID) != 0 &&
712 (inode->i_mode & (S_ISGID | S_IXGRP)) ==
713 (S_ISGID | S_IXGRP))
714 inode->i_mode &= ~S_ISGID;
1da177e4 715 if ((attr->ia_valid & ATTR_MODE) != 0) {
65e4308d
TM		 716 int mode = attr->ia_mode & S_IALLUGO;
717 mode |= inode->i_mode & ~S_IALLUGO;
1da177e4
LT		 718 inode->i_mode = mode;
719 }
720 if ((attr->ia_valid & ATTR_UID) != 0)
721 inode->i_uid = attr->ia_uid;
722 if ((attr->ia_valid & ATTR_GID) != 0)
723 inode->i_gid = attr->ia_gid;
6a97d02d 724 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 725 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 726 else
727 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
728 | NFS_INO_INVALID_CTIME);
6edf9609
TM		 729 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
730 | NFS_INO_INVALID_ACL);
65e4308d 731 }
6a97d02d
TM		 732 if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
733 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
734 | NFS_INO_INVALID_CTIME);
735 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 736 inode->i_atime = fattr->atime;
6a97d02d
TM		 737 else if (attr->ia_valid & ATTR_ATIME_SET)
738 inode->i_atime = attr->ia_atime;
739 else
740 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
741
742 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 743 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 744 else
745 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
746 | NFS_INO_INVALID_CTIME);
747 }
748 if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
749 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
750 | NFS_INO_INVALID_CTIME);
751 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 752 inode->i_mtime = fattr->mtime;
6a97d02d
TM		 753 else if (attr->ia_valid & ATTR_MTIME_SET)
754 inode->i_mtime = attr->ia_mtime;
755 else
756 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
757
758 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 759 inode->i_ctime = fattr->ctime;
6a97d02d
TM		 760 else
761 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
762 | NFS_INO_INVALID_CTIME);
65e4308d 763 }
616c3196
JL		 764 if (fattr->valid)
765 nfs_update_inode(inode, fattr);
f044636d 766 spin_unlock(&inode->i_lock);
1da177e4 767}
ddda8e0a 768EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
1da177e4 769
1bcf4c5c 770static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
311324ad
TM		 771{
772 struct dentry *parent;
773
1bcf4c5c
TM		 774 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
775 return;
311324ad 776 parent = dget_parent(dentry);
2b0143b5 777 nfs_force_use_readdirplus(d_inode(parent));
311324ad
TM		 778 dput(parent);
779}
780
1bcf4c5c
TM		 781static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
782{
783 struct dentry *parent;
784
785 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
786 return;
787 parent = dget_parent(dentry);
788 nfs_advise_use_readdirplus(d_inode(parent));
789 dput(parent);
790}
791
63cdd7ed 792static u32 nfs_get_valid_attrmask(struct inode *inode)
311324ad 793{
63cdd7ed
TM		 794 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
795 u32 reply_mask = STATX_INO | STATX_TYPE;
796
797 if (!(cache_validity & NFS_INO_INVALID_ATIME))
798 reply_mask |= STATX_ATIME;
13c0b082
TM		 799 if (!(cache_validity & NFS_INO_INVALID_CTIME))
800 reply_mask |= STATX_CTIME;
801 if (!(cache_validity & NFS_INO_INVALID_MTIME))
802 reply_mask |= STATX_MTIME;
803 if (!(cache_validity & NFS_INO_INVALID_SIZE))
804 reply_mask |= STATX_SIZE;
fabf2b34
TM		 805 if (!(cache_validity & NFS_INO_INVALID_NLINK))
806 reply_mask |= STATX_NLINK;
720869eb
TM		 807 if (!(cache_validity & NFS_INO_INVALID_MODE))
808 reply_mask |= STATX_MODE;
63cdd7ed 809 if (!(cache_validity & NFS_INO_INVALID_OTHER))
720869eb 810 reply_mask |= STATX_UID | STATX_GID;
63cdd7ed
TM		 811 if (!(cache_validity & NFS_INO_INVALID_BLOCKS))
812 reply_mask |= STATX_BLOCKS;
813 return reply_mask;
311324ad
TM		 814}
815
549c7297
CB		 816int nfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
817 struct kstat *stat, u32 request_mask, unsigned int query_flags)
1da177e4 818{
a528d35e 819 struct inode *inode = d_inode(path->dentry);
9ccee940
TM		 820 struct nfs_server *server = NFS_SERVER(inode);
821 unsigned long cache_validity;
16caf5b6 822 int err = 0;
9ccee940
TM		 823 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
824 bool do_update = false;
1da177e4 825
f4ce1299 826 trace_nfs_getattr_enter(inode);
9ccee940 827
4eb6a823
TM		 828 request_mask &= STATX_TYPE | STATX_MODE | STATX_NLINK | STATX_UID |
829 STATX_GID | STATX_ATIME | STATX_MTIME | STATX_CTIME |
830 STATX_INO | STATX_SIZE | STATX_BLOCKS;
831
ac7cbb22
TM		 832 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
833 nfs_readdirplus_parent_cache_hit(path->dentry);
63cdd7ed 834 goto out_no_revalidate;
ac7cbb22 835 }
9ccee940 836
acdc53b2 837 /* Flush out writes to the server in order to update c/mtime. */
9ccee940
TM		 838 if ((request_mask & (STATX_CTIME|STATX_MTIME)) &&
839 S_ISREG(inode->i_mode)) {
79566ef0 840 err = filemap_write_and_wait(inode->i_mapping);
acdc53b2
TM		 841 if (err)
842 goto out;
28c494c5 843 }
fc33a7bb
CH		 844
845 /*
846 * We may force a getattr if the user cares about atime.
847 *
848 * Note that we only have to check the vfsmount flags here:
849 * - NFS always sets S_NOATIME by so checking it would give a
850 * bogus result
1751e8a6 851 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
fc33a7bb
CH		 852 * no point in checking those.
853 */
a528d35e
DH		 854 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
855 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
9ccee940
TM		 856 request_mask &= ~STATX_ATIME;
857
858 /* Is the user requesting attributes that might need revalidation? */
859 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
860 STATX_MTIME|STATX_UID|STATX_GID|
861 STATX_SIZE|STATX_BLOCKS)))
862 goto out_no_revalidate;
863
864 /* Check whether the cached attributes are stale */
865 do_update |= force_sync || nfs_attribute_cache_expired(inode);
866 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
e8764a6f 867 do_update |= cache_validity & NFS_INO_INVALID_CHANGE;
9ccee940
TM		 868 if (request_mask & STATX_ATIME)
869 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
e8764a6f
TM		 870 if (request_mask & STATX_CTIME)
871 do_update |= cache_validity & NFS_INO_INVALID_CTIME;
872 if (request_mask & STATX_MTIME)
873 do_update |= cache_validity & NFS_INO_INVALID_MTIME;
874 if (request_mask & STATX_SIZE)
875 do_update |= cache_validity & NFS_INO_INVALID_SIZE;
fabf2b34
TM		 876 if (request_mask & STATX_NLINK)
877 do_update |= cache_validity & NFS_INO_INVALID_NLINK;
720869eb
TM		 878 if (request_mask & STATX_MODE)
879 do_update |= cache_validity & NFS_INO_INVALID_MODE;
880 if (request_mask & (STATX_UID | STATX_GID))
e8764a6f 881 do_update |= cache_validity & NFS_INO_INVALID_OTHER;
3a39e778
ZB		 882 if (request_mask & STATX_BLOCKS)
883 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
63cdd7ed 884
9ccee940
TM		 885 if (do_update) {
886 /* Update the attribute cache */
59b86d85
HT		 887 if (!(server->flags & NFS_MOUNT_NOAC))
888 nfs_readdirplus_parent_cache_miss(path->dentry);
889 else
890 nfs_readdirplus_parent_cache_hit(path->dentry);
311324ad 891 err = __nfs_revalidate_inode(server, inode);
9ccee940
TM		 892 if (err)
893 goto out;
1bcf4c5c 894 } else
a528d35e 895 nfs_readdirplus_parent_cache_hit(path->dentry);
9ccee940
TM		 896out_no_revalidate:
897 /* Only return attributes that were revalidated. */
63cdd7ed
TM		 898 stat->result_mask = nfs_get_valid_attrmask(inode) | request_mask;
899
0d56a451 900 generic_fillattr(&init_user_ns, inode, stat);
9ccee940
TM		 901 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
902 if (S_ISDIR(inode->i_mode))
903 stat->blksize = NFS_SERVER(inode)->dtsize;
acdc53b2 904out:
f4ce1299 905 trace_nfs_getattr_exit(inode, err);
1da177e4
LT		 906 return err;
907}
ddda8e0a 908EXPORT_SYMBOL_GPL(nfs_getattr);
1da177e4 909
f11ac8db
TM		 910static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
911{
2f62b5aa 912 refcount_set(&l_ctx->count, 1);
d51fdb87 913 l_ctx->lockowner = current->files;
f11ac8db 914 INIT_LIST_HEAD(&l_ctx->list);
210c7c17 915 atomic_set(&l_ctx->io_count, 0);
f11ac8db
TM		 916}
917
918static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
919{
1db97eaa 920 struct nfs_lock_context *pos;
f11ac8db 921
1db97eaa 922 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
d51fdb87 923 if (pos->lockowner != current->files)
f11ac8db 924 continue;
1db97eaa
TM		 925 if (refcount_inc_not_zero(&pos->count))
926 return pos;
927 }
f11ac8db
TM		 928 return NULL;
929}
930
931struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
932{
933 struct nfs_lock_context *res, *new = NULL;
2b0143b5 934 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 935
1db97eaa 936 rcu_read_lock();
f11ac8db 937 res = __nfs_find_lock_context(ctx);
1db97eaa 938 rcu_read_unlock();
f11ac8db 939 if (res == NULL) {
f11ac8db
TM		 940 new = kmalloc(sizeof(*new), GFP_KERNEL);
941 if (new == NULL)
b3c54de6 942 return ERR_PTR(-ENOMEM);
f11ac8db
TM		 943 nfs_init_lock_context(new);
944 spin_lock(&inode->i_lock);
945 res = __nfs_find_lock_context(ctx);
946 if (res == NULL) {
15494511
TM		 947 new->open_context = get_nfs_open_context(ctx);
948 if (new->open_context) {
949 list_add_tail_rcu(&new->list,
950 &ctx->lock_context.list);
951 res = new;
952 new = NULL;
953 } else
954 res = ERR_PTR(-EBADF);
f11ac8db 955 }
1db97eaa
TM		 956 spin_unlock(&inode->i_lock);
957 kfree(new);
f11ac8db 958 }
f11ac8db
TM		 959 return res;
960}
1c6dcbe5 961EXPORT_SYMBOL_GPL(nfs_get_lock_context);
f11ac8db
TM		 962
963void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
964{
965 struct nfs_open_context *ctx = l_ctx->open_context;
2b0143b5 966 struct inode *inode = d_inode(ctx->dentry);
f11ac8db 967
2f62b5aa 968 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
f11ac8db 969 return;
1db97eaa 970 list_del_rcu(&l_ctx->list);
f11ac8db 971 spin_unlock(&inode->i_lock);
15494511 972 put_nfs_open_context(ctx);
1db97eaa 973 kfree_rcu(l_ctx, rcu_head);
f11ac8db 974}
1c6dcbe5 975EXPORT_SYMBOL_GPL(nfs_put_lock_context);
f11ac8db 976
7fe5c398
TM		 977/**
978 * nfs_close_context - Common close_context() routine NFSv2/v3
979 * @ctx: pointer to context
980 * @is_sync: is this a synchronous close
981 *
5cf9d706
TM		 982 * Ensure that the attributes are up to date if we're mounted
983 * with close-to-open semantics and we have cached data that will
984 * need to be revalidated on open.
7fe5c398
TM		 985 */
986void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
987{
5cf9d706 988 struct nfs_inode *nfsi;
7fe5c398 989 struct inode *inode;
7fe5c398
TM		 990
991 if (!(ctx->mode & FMODE_WRITE))
992 return;
993 if (!is_sync)
994 return;
2b0143b5 995 inode = d_inode(ctx->dentry);
58ff4184
TM		 996 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
997 return;
5cf9d706
TM		 998 nfsi = NFS_I(inode);
999 if (inode->i_mapping->nrpages == 0)
1000 return;
1001 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1002 return;
1003 if (!list_empty(&nfsi->open_files))
7fe5c398 1004 return;
1f3208b2 1005 if (NFS_SERVER(inode)->flags & NFS_MOUNT_NOCTO)
7fe5c398 1006 return;
1f3208b2
TM		 1007 nfs_revalidate_inode(inode,
1008 NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_SIZE);
7fe5c398 1009}
ddda8e0a 1010EXPORT_SYMBOL_GPL(nfs_close_context);
7fe5c398 1011
532d4def
N		 1012struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
1013 fmode_t f_mode,
1014 struct file *filp)
1da177e4
LT		 1015{
1016 struct nfs_open_context *ctx;
1017
f52720ca 1018 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
1d179d6b 1019 if (!ctx)
5ede7b1c 1020 return ERR_PTR(-ENOMEM);
5ede7b1c
AV		 1021 nfs_sb_active(dentry->d_sb);
1022 ctx->dentry = dget(dentry);
1d179d6b
TM		 1023 if (filp)
1024 ctx->cred = get_cred(filp->f_cred);
1025 else
1026 ctx->cred = get_current_cred();
ddf529ee 1027 ctx->ll_cred = NULL;
5ede7b1c
AV		 1028 ctx->state = NULL;
1029 ctx->mode = f_mode;
1030 ctx->flags = 0;
1031 ctx->error = 0;
532d4def 1032 ctx->flock_owner = (fl_owner_t)filp;
5ede7b1c
AV		 1033 nfs_init_lock_context(&ctx->lock_context);
1034 ctx->lock_context.open_context = ctx;
1035 INIT_LIST_HEAD(&ctx->list);
82be417a 1036 ctx->mdsthreshold = NULL;
1da177e4
LT		 1037 return ctx;
1038}
89d77c8f 1039EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
1da177e4
LT		 1040
1041struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1042{
0de43976
TM		 1043 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
1044 return ctx;
1045 return NULL;
1da177e4 1046}
89d77c8f 1047EXPORT_SYMBOL_GPL(get_nfs_open_context);
1da177e4 1048
7fe5c398 1049static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
1da177e4 1050{
2b0143b5 1051 struct inode *inode = d_inode(ctx->dentry);
3d4ff43d 1052 struct super_block *sb = ctx->dentry->d_sb;
3bec63db 1053
0de43976
TM		 1054 if (!refcount_dec_and_test(&ctx->lock_context.count))
1055 return;
5c78f58e 1056 if (!list_empty(&ctx->list)) {
0de43976
TM		 1057 spin_lock(&inode->i_lock);
1058 list_del_rcu(&ctx->list);
ef84303e 1059 spin_unlock(&inode->i_lock);
0de43976 1060 }
5c78f58e
TM		 1061 if (inode != NULL)
1062 NFS_PROTO(inode)->close_context(ctx, is_sync);
a52458b4 1063 put_cred(ctx->cred);
3d4ff43d 1064 dput(ctx->dentry);
322b2b90 1065 nfs_sb_deactive(sb);
ddf529ee 1066 put_rpccred(ctx->ll_cred);
82be417a 1067 kfree(ctx->mdsthreshold);
0de43976 1068 kfree_rcu(ctx, rcu_head);
3bec63db
TM		 1069}
1070
a49c3c77
TM		 1071void put_nfs_open_context(struct nfs_open_context *ctx)
1072{
1073 __put_nfs_open_context(ctx, 0);
1074}
89d77c8f 1075EXPORT_SYMBOL_GPL(put_nfs_open_context);
a49c3c77 1076
4eae5014
TM		 1077static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1078{
1079 __put_nfs_open_context(ctx, 1);
1080}
1081
1da177e4
LT		 1082/*
1083 * Ensure that mmap has a recent RPC credential for use when writing out
1084 * shared pages
1085 */
c45ffdd2 1086void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1da177e4 1087{
2b0143b5 1088 struct inode *inode = d_inode(ctx->dentry);
1da177e4
LT		 1089 struct nfs_inode *nfsi = NFS_I(inode);
1090
1da177e4 1091 spin_lock(&inode->i_lock);
1c341b77
TM		 1092 if (list_empty(&nfsi->open_files) &&
1093 (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER))
ac46b3d7
TM		 1094 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA |
1095 NFS_INO_REVAL_FORCED);
0de43976 1096 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1da177e4
LT		 1097 spin_unlock(&inode->i_lock);
1098}
c45ffdd2
TM		 1099EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1100
1101void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1102{
1103 filp->private_data = get_nfs_open_context(ctx);
e97bc663 1104 set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
c45ffdd2
TM		 1105 if (list_empty(&ctx->list))
1106 nfs_inode_attach_open_context(ctx);
1107}
89d77c8f 1108EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1da177e4 1109
d530838b
TM		 1110/*
1111 * Given an inode, search for an open context with the desired characteristics
1112 */
a52458b4 1113struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1da177e4
LT		 1114{
1115 struct nfs_inode *nfsi = NFS_I(inode);
1116 struct nfs_open_context *pos, *ctx = NULL;
1117
0de43976
TM		 1118 rcu_read_lock();
1119 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
65f51603 1120 if (cred != NULL && cred_fscmp(pos->cred, cred) != 0)
d530838b 1121 continue;
1544fa0f
TM		 1122 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1123 continue;
e97bc663
TM		 1124 if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags))
1125 continue;
1544fa0f 1126 ctx = get_nfs_open_context(pos);
0de43976
TM		 1127 if (ctx)
1128 break;
1da177e4 1129 }
0de43976 1130 rcu_read_unlock();
1da177e4
LT		 1131 return ctx;
1132}
1133
aff8d8dc 1134void nfs_file_clear_open_context(struct file *filp)
1da177e4 1135{
cd3758e3 1136 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1da177e4
LT		 1137
1138 if (ctx) {
2b0143b5 1139 struct inode *inode = d_inode(ctx->dentry);
c45ffdd2 1140
e97bc663 1141 clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
0bcbf039
PT		 1142 /*
1143 * We fatal error on write before. Try to writeback
1144 * every page again.
1145 */
1146 if (ctx->error < 0)
1147 invalidate_inode_pages2(inode->i_mapping);
1da177e4 1148 filp->private_data = NULL;
4eae5014 1149 put_nfs_open_context_sync(ctx);
1da177e4
LT		 1150 }
1151}
1152
1153/*
1154 * These allocate and release file read/write context information.
1155 */
1156int nfs_open(struct inode *inode, struct file *filp)
1157{
1158 struct nfs_open_context *ctx;
1da177e4 1159
532d4def 1160 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
5ede7b1c
AV		 1161 if (IS_ERR(ctx))
1162 return PTR_ERR(ctx);
1da177e4
LT		 1163 nfs_file_set_open_context(filp, ctx);
1164 put_nfs_open_context(ctx);
f1fe29b4 1165 nfs_fscache_open_file(inode, filp);
1da177e4
LT		 1166 return 0;
1167}
44942b4e 1168EXPORT_SYMBOL_GPL(nfs_open);
1da177e4 1169
1da177e4
LT		 1170/*
1171 * This function is called whenever some part of NFS notices that
1172 * the cached attributes have to be refreshed.
1173 */
1174int
1175__nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1176{
1177 int status = -ESTALE;
1775fd3e 1178 struct nfs4_label *label = NULL;
a3cba2aa 1179 struct nfs_fattr *fattr = NULL;
1da177e4 1180 struct nfs_inode *nfsi = NFS_I(inode);
1da177e4 1181
1e8968c5
NV		 1182 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1183 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1da177e4 1184
f4ce1299
TM		 1185 trace_nfs_revalidate_inode_enter(inode);
1186
85233a7a 1187 if (is_bad_inode(inode))
691beb13 1188 goto out;
1da177e4 1189 if (NFS_STALE(inode))
412d582e 1190 goto out;
7fdc49c4 1191
ac46bd37
TM		 1192 /* pNFS: Attributes aren't updated until we layoutcommit */
1193 if (S_ISREG(inode->i_mode)) {
1194 status = pnfs_sync_inode(inode, false);
1195 if (status)
1196 goto out;
1197 }
1198
a3cba2aa
TM		 1199 status = -ENOMEM;
1200 fattr = nfs_alloc_fattr();
1201 if (fattr == NULL)
1202 goto out;
1203
691beb13 1204 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
14c43f76
DQ		 1205
1206 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1207 if (IS_ERR(label)) {
1208 status = PTR_ERR(label);
1209 goto out;
1210 }
1211
a841b54d
TM		 1212 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr,
1213 label, inode);
1da177e4 1214 if (status != 0) {
1e8968c5 1215 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1da177e4 1216 inode->i_sb->s_id,
1e8968c5 1217 (unsigned long long)NFS_FILEID(inode), status);
c74dfe97
TM		 1218 switch (status) {
1219 case -ETIMEDOUT:
1220 /* A soft timeout occurred. Use cached information? */
1221 if (server->flags & NFS_MOUNT_SOFTREVAL)
1222 status = 0;
1223 break;
1224 case -ESTALE:
1da177e4 1225 if (!S_ISDIR(inode->i_mode))
93ce4af7
TM		 1226 nfs_set_inode_stale(inode);
1227 else
1228 nfs_zap_caches(inode);
1da177e4 1229 }
14c43f76 1230 goto err_out;
1da177e4
LT		 1231 }
1232
a3cba2aa 1233 status = nfs_refresh_inode(inode, fattr);
1da177e4 1234 if (status) {
1e8968c5 1235 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1da177e4 1236 inode->i_sb->s_id,
1e8968c5 1237 (unsigned long long)NFS_FILEID(inode), status);
14c43f76 1238 goto err_out;
1da177e4 1239 }
55296809 1240
24aa1fe6 1241 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
ada70d94 1242 nfs_zap_acl_cache(inode);
55296809 1243
3da580aa
JL		 1244 nfs_setsecurity(inode, fattr, label);
1245
1e8968c5 1246 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1da177e4 1247 inode->i_sb->s_id,
1e8968c5 1248 (unsigned long long)NFS_FILEID(inode));
1da177e4 1249
14c43f76
DQ		 1250err_out:
1251 nfs4_label_free(label);
1252out:
a3cba2aa 1253 nfs_free_fattr(fattr);
f4ce1299 1254 trace_nfs_revalidate_inode_exit(inode, status);
1da177e4
LT		 1255 return status;
1256}
1257
43f291cd 1258int nfs_attribute_cache_expired(struct inode *inode)
d7cf8dd0 1259{
b4d2314b 1260 if (nfs_have_delegated_attributes(inode))
1da177e4 1261 return 0;
d7cf8dd0 1262 return nfs_attribute_timeout(inode);
1da177e4
LT		 1263}
1264
1265/**
1266 * nfs_revalidate_inode - Revalidate the inode attributes
302fad7b 1267 * @inode: pointer to inode struct
1f3208b2 1268 * @flags: cache flags to check
1da177e4
LT		 1269 *
1270 * Updates inode attribute information by retrieving the data from the server.
1271 */
1f3208b2 1272int nfs_revalidate_inode(struct inode *inode, unsigned long flags)
1da177e4 1273{
1f3208b2 1274 if (!nfs_check_cache_invalid(inode, flags))
1da177e4 1275 return NFS_STALE(inode) ? -ESTALE : 0;
1f3208b2 1276 return __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1da177e4 1277}
1c606fb7 1278EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1da177e4 1279
1cda707d 1280static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
717d44e8 1281{
f8806c84
TM		 1282 int ret;
1283
717d44e8 1284 if (mapping->nrpages != 0) {
f8806c84
TM		 1285 if (S_ISREG(inode->i_mode)) {
1286 ret = nfs_sync_mapping(mapping);
1287 if (ret < 0)
1288 return ret;
1289 }
1290 ret = invalidate_inode_pages2(mapping);
717d44e8
TM		 1291 if (ret < 0)
1292 return ret;
1293 }
717d44e8 1294 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
de242c0b 1295 nfs_fscache_wait_on_invalidate(inode);
f4ce1299 1296
1e8968c5
NV		 1297 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1298 inode->i_sb->s_id,
1299 (unsigned long long)NFS_FILEID(inode));
717d44e8
TM		 1300 return 0;
1301}
1302
717d44e8 1303/**
28aa2f9e 1304 * nfs_clear_invalid_mapping - Conditionally clear a mapping
302fad7b 1305 * @mapping: pointer to mapping
28aa2f9e
TM		 1306 *
1307 * If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping.
717d44e8 1308 */
28aa2f9e 1309int nfs_clear_invalid_mapping(struct address_space *mapping)
717d44e8 1310{
28aa2f9e 1311 struct inode *inode = mapping->host;
717d44e8 1312 struct nfs_inode *nfsi = NFS_I(inode);
d529ef83 1313 unsigned long *bitlock = &nfsi->flags;
717d44e8 1314 int ret = 0;
dc59250c 1315
d529ef83
JL		 1316 /*
1317 * We must clear NFS_INO_INVALID_DATA first to ensure that
1318 * invalidations that come in while we're shooting down the mappings
1319 * are respected. But, that leaves a race window where one revalidator
1320 * can clear the flag, and then another checks it before the mapping
1321 * gets invalidated. Fix that by serializing access to this part of
1322 * the function.
1323 *
1324 * At the same time, we need to allow other tasks to see whether we
1325 * might be in the middle of invalidating the pages, so we only set
1326 * the bit lock here if it looks like we're going to be doing that.
1327 */
1328 for (;;) {
74316201
N		 1329 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1330 nfs_wait_bit_killable, TASK_KILLABLE);
d529ef83
JL		 1331 if (ret)
1332 goto out;
17dfeb91
TM		 1333 spin_lock(&inode->i_lock);
1334 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1335 spin_unlock(&inode->i_lock);
1336 continue;
1337 }
1338 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
d529ef83 1339 break;
d529ef83 1340 spin_unlock(&inode->i_lock);
17dfeb91 1341 goto out;
f4ce1299
TM		 1342 }
1343
17dfeb91 1344 set_bit(NFS_INO_INVALIDATING, bitlock);
4db72b40 1345 smp_wmb();
28aa2f9e
TM		 1346 nfsi->cache_validity &=
1347 ~(NFS_INO_INVALID_DATA | NFS_INO_DATA_INVAL_DEFER);
17dfeb91
TM		 1348 spin_unlock(&inode->i_lock);
1349 trace_nfs_invalidate_mapping_enter(inode);
be527494 1350 ret = nfs_invalidate_mapping(inode, mapping);
17dfeb91
TM		 1351 trace_nfs_invalidate_mapping_exit(inode, ret);
1352
d529ef83 1353 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
4e857c58 1354 smp_mb__after_atomic();
d529ef83 1355 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
cd9ae2b6 1356out:
44b11874 1357 return ret;
7d52e862
TM		 1358}
1359
28aa2f9e
TM		 1360bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1361{
13c0b082 1362 return nfs_check_cache_invalid(inode, NFS_INO_INVALID_CHANGE) ||
28aa2f9e
TM		 1363 NFS_STALE(inode);
1364}
1365
1366int nfs_revalidate_mapping_rcu(struct inode *inode)
1367{
1368 struct nfs_inode *nfsi = NFS_I(inode);
1369 unsigned long *bitlock = &nfsi->flags;
1370 int ret = 0;
1371
1372 if (IS_SWAPFILE(inode))
1373 goto out;
1374 if (nfs_mapping_need_revalidate_inode(inode)) {
1375 ret = -ECHILD;
1376 goto out;
1377 }
1378 spin_lock(&inode->i_lock);
1379 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1380 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1381 ret = -ECHILD;
1382 spin_unlock(&inode->i_lock);
1383out:
1384 return ret;
1385}
1386
1387/**
1388 * nfs_revalidate_mapping - Revalidate the pagecache
1389 * @inode: pointer to host inode
1390 * @mapping: pointer to mapping
1391 */
1392int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1393{
1394 /* swapfiles are not supposed to be shared. */
1395 if (IS_SWAPFILE(inode))
1396 return 0;
1397
1398 if (nfs_mapping_need_revalidate_inode(inode)) {
1399 int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1400 if (ret < 0)
1401 return ret;
1402 }
1403
1404 return nfs_clear_invalid_mapping(mapping);
1405}
1406
ca0daa27 1407static bool nfs_file_has_writers(struct nfs_inode *nfsi)
874f9463 1408{
ca0daa27
TM		 1409 struct inode *inode = &nfsi->vfs_inode;
1410
ca0daa27
TM		 1411 if (!S_ISREG(inode->i_mode))
1412 return false;
1413 if (list_empty(&nfsi->open_files))
1414 return false;
6ba0c4e5 1415 return inode_is_open_for_write(inode);
874f9463
TM		 1416}
1417
651b0e70 1418static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
874f9463 1419{
651b0e70 1420 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
874f9463
TM		 1421}
1422
783b194c 1423static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
a895b4a1 1424{
e86d5a02 1425 struct timespec64 ts;
95582b00 1426
9e6e70f8
TM		 1427 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1428 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
c472c07b 1429 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1eb5d98f 1430 inode_set_iversion_raw(inode, fattr->change_attr);
70ca8852 1431 if (S_ISDIR(inode->i_mode))
6edf9609 1432 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
0f44da51
FL		 1433 else if (nfs_server_capable(inode, NFS_CAP_XATTR))
1434 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
70ca8852 1435 }
a895b4a1 1436 /* If we have atomic WCC data, we may update some attributes */
e86d5a02 1437 ts = inode->i_ctime;
9e6e70f8
TM		 1438 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1439 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02
TM		 1440 && timespec64_equal(&ts, &fattr->pre_ctime)) {
1441 inode->i_ctime = fattr->ctime;
27dc1cd3 1442 }
9e6e70f8 1443
e86d5a02 1444 ts = inode->i_mtime;
9e6e70f8
TM		 1445 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1446 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02
TM		 1447 && timespec64_equal(&ts, &fattr->pre_mtime)) {
1448 inode->i_mtime = fattr->mtime;
27dc1cd3 1449 if (S_ISDIR(inode->i_mode))
6edf9609 1450 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
a895b4a1 1451 }
9e6e70f8
TM		 1452 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1453 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1454 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
a6b6d5b8 1455 && !nfs_have_writebacks(inode)) {
27dc1cd3 1456 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
27dc1cd3 1457 }
a895b4a1
TM		 1458}
1459
1da177e4 1460/**
33801147 1461 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
302fad7b
TM		 1462 * @inode: pointer to inode
1463 * @fattr: updated attributes
1da177e4
LT		 1464 *
1465 * Verifies the attribute cache. If we have just changed the attributes,
1466 * so that fattr carries weak cache consistency data, then it may
1467 * also update the ctime/mtime/change_attribute.
1468 */
33801147 1469static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1da177e4
LT		 1470{
1471 struct nfs_inode *nfsi = NFS_I(inode);
1472 loff_t cur_size, new_isize;
2a3f5fd4 1473 unsigned long invalid = 0;
e86d5a02 1474 struct timespec64 ts;
dc59250c 1475
4ebe83af 1476 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
01da47bd 1477 return 0;
4ebe83af 1478
eb3d8f42
TM		 1479 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1480 /* Only a mounted-on-fileid? Just exit */
1481 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1482 return 0;
ca62b9c3 1483 /* Has the inode gone and changed behind our back? */
eb3d8f42 1484 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 1485 /* Is this perhaps the mounted-on fileid? */
1486 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1487 nfsi->fileid == fattr->mounted_on_fileid)
1488 return 0;
cc89684c 1489 return -ESTALE;
7e10cc25 1490 }
6e3e2c43 1491 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode))
cc89684c 1492 return -ESTALE;
ca62b9c3 1493
7e10cc25 1494
651b0e70 1495 if (!nfs_file_has_buffered_writers(nfsi)) {
ca0daa27 1496 /* Verify a few of the more important attributes */
c472c07b 1497 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
04c63498 1498 invalid |= NFS_INO_INVALID_CHANGE;
1da177e4 1499
e86d5a02
TM		 1500 ts = inode->i_mtime;
1501 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
16e14375 1502 invalid |= NFS_INO_INVALID_MTIME;
ca62b9c3 1503
e86d5a02
TM		 1504 ts = inode->i_ctime;
1505 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
16e14375 1506 invalid |= NFS_INO_INVALID_CTIME;
ca0daa27
TM		 1507
1508 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1509 cur_size = i_size_read(inode);
1510 new_isize = nfs_size_to_loff_t(fattr->size);
1511 if (cur_size != new_isize)
04c63498 1512 invalid |= NFS_INO_INVALID_SIZE;
ca0daa27 1513 }
9e6e70f8 1514 }
1da177e4
LT		 1515
1516 /* Have any file permissions changed? */
9e6e70f8 1517 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
04c63498 1518 invalid |= NFS_INO_INVALID_MODE;
9ff593c4 1519 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
04c63498 1520 invalid |= NFS_INO_INVALID_OTHER;
9ff593c4 1521 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
04c63498 1522 invalid |= NFS_INO_INVALID_OTHER;
1da177e4
LT		 1523
1524 /* Has the link count changed? */
9e6e70f8 1525 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
fabf2b34 1526 invalid |= NFS_INO_INVALID_NLINK;
1da177e4 1527
e86d5a02
TM		 1528 ts = inode->i_atime;
1529 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
2a3f5fd4
TM		 1530 invalid |= NFS_INO_INVALID_ATIME;
1531
1532 if (invalid != 0)
4ebe83af 1533 nfs_set_cache_invalid(inode, invalid);
1da177e4 1534
33801147 1535 nfsi->read_cache_jiffies = fattr->time_start;
1da177e4
LT		 1536 return 0;
1537}
1538
ae05f269 1539static atomic_long_t nfs_attr_generation_counter;
4704f0e2
TM		 1540
1541static unsigned long nfs_read_attr_generation_counter(void)
1542{
ae05f269 1543 return atomic_long_read(&nfs_attr_generation_counter);
4704f0e2
TM		 1544}
1545
1546unsigned long nfs_inc_attr_generation_counter(void)
1547{
ae05f269 1548 return atomic_long_inc_return(&nfs_attr_generation_counter);
4704f0e2 1549}
3235b403 1550EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
4704f0e2
TM		 1551
1552void nfs_fattr_init(struct nfs_fattr *fattr)
1553{
1554 fattr->valid = 0;
1555 fattr->time_start = jiffies;
1556 fattr->gencount = nfs_inc_attr_generation_counter();
6926afd1
TM		 1557 fattr->owner_name = NULL;
1558 fattr->group_name = NULL;
4704f0e2 1559}
ddda8e0a 1560EXPORT_SYMBOL_GPL(nfs_fattr_init);
4704f0e2 1561
140e049c
TM		 1562/**
1563 * nfs_fattr_set_barrier
1564 * @fattr: attributes
1565 *
1566 * Used to set a barrier after an attribute was updated. This
1567 * barrier ensures that older attributes from RPC calls that may
1568 * have raced with our update cannot clobber these new values.
1569 * Note that you are still responsible for ensuring that other
1570 * operations which change the attribute on the server do not
1571 * collide.
1572 */
1573void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1574{
1575 fattr->gencount = nfs_inc_attr_generation_counter();
1576}
1577
2d36bfde
TM		 1578struct nfs_fattr *nfs_alloc_fattr(void)
1579{
1580 struct nfs_fattr *fattr;
1581
1582 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1583 if (fattr != NULL)
1584 nfs_fattr_init(fattr);
1585 return fattr;
1586}
ddda8e0a 1587EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
2d36bfde
TM		 1588
1589struct nfs_fh *nfs_alloc_fhandle(void)
1590{
1591 struct nfs_fh *fh;
1592
1593 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1594 if (fh != NULL)
1595 fh->size = 0;
1596 return fh;
1597}
ddda8e0a 1598EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
2d36bfde 1599
e27d359e 1600#ifdef NFS_DEBUG
d8e0539e
WAA		 1601/*
1602 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1603 * in the same way that wireshark does
1604 *
1605 * @fh: file handle
1606 *
1607 * For debugging only.
1608 */
1609u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1610{
1611 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1612 * not on the result */
1264a2f0 1613 return nfs_fhandle_hash(fh);
d8e0539e 1614}
9e6ee76d 1615EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
d8e0539e
WAA		 1616
1617/*
20d27e92
CL		 1618 * _nfs_display_fhandle - display an NFS file handle on the console
1619 *
1620 * @fh: file handle to display
1621 * @caption: display caption
1622 *
1623 * For debugging only.
1624 */
20d27e92
CL		 1625void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1626{
1627 unsigned short i;
1628
fa68a1ba 1629 if (fh == NULL || fh->size == 0) {
20d27e92
CL		 1630 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1631 return;
1632 }
1633
d8e0539e
WAA		 1634 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1635 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
20d27e92
CL		 1636 for (i = 0; i < fh->size; i += 16) {
1637 __be32 *pos = (__be32 *)&fh->data[i];
1638
1639 switch ((fh->size - i - 1) >> 2) {
1640 case 0:
1641 printk(KERN_DEFAULT " %08x\n",
1642 be32_to_cpup(pos));
1643 break;
1644 case 1:
1645 printk(KERN_DEFAULT " %08x %08x\n",
1646 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1647 break;
1648 case 2:
1649 printk(KERN_DEFAULT " %08x %08x %08x\n",
1650 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1651 be32_to_cpup(pos + 2));
1652 break;
1653 default:
1654 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1655 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1656 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1657 }
1658 }
1659}
9e6ee76d 1660EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
20d27e92
CL		 1661#endif
1662
a10ad176 1663/**
6f9be83d 1664 * nfs_inode_attrs_cmp_generic - compare attributes
302fad7b 1665 * @fattr: attributes
302fad7b 1666 * @inode: pointer to inode
a10ad176
TM		 1667 *
1668 * Attempt to divine whether or not an RPC call reply carrying stale
1669 * attributes got scheduled after another call carrying updated ones.
4704f0e2 1670 * Note also the check for wraparound of 'attr_gencount'
a10ad176 1671 *
6f9be83d
TM		 1672 * The function returns '1' if it thinks the attributes in @fattr are
1673 * more recent than the ones cached in @inode. Otherwise it returns
1674 * the value '0'.
a10ad176 1675 */
6f9be83d
TM		 1676static int nfs_inode_attrs_cmp_generic(const struct nfs_fattr *fattr,
1677 const struct inode *inode)
a10ad176 1678{
9fdbfad1 1679 unsigned long attr_gencount = NFS_I(inode)->attr_gencount;
a10ad176 1680
9fdbfad1
TM		 1681 return (long)(fattr->gencount - attr_gencount) > 0 ||
1682 (long)(attr_gencount - nfs_read_attr_generation_counter()) > 0;
a10ad176
TM		 1683}
1684
6f9be83d
TM		 1685/**
1686 * nfs_inode_attrs_cmp_monotonic - compare attributes
302fad7b 1687 * @fattr: attributes
6f9be83d 1688 * @inode: pointer to inode
a10ad176
TM		 1689 *
1690 * Attempt to divine whether or not an RPC call reply carrying stale
1691 * attributes got scheduled after another call carrying updated ones.
1692 *
6f9be83d
TM		 1693 * We assume that the server observes monotonic semantics for
1694 * the change attribute, so a larger value means that the attributes in
1695 * @fattr are more recent, in which case the function returns the
1696 * value '1'.
1697 * A return value of '0' indicates no measurable change
1698 * A return value of '-1' means that the attributes in @inode are
1699 * more recent.
1700 */
1701static int nfs_inode_attrs_cmp_monotonic(const struct nfs_fattr *fattr,
1702 const struct inode *inode)
a10ad176 1703{
6f9be83d
TM		 1704 s64 diff = fattr->change_attr - inode_peek_iversion_raw(inode);
1705 if (diff > 0)
1706 return 1;
1707 return diff == 0 ? 0 : -1;
1708}
1709
1710/**
1711 * nfs_inode_attrs_cmp_strict_monotonic - compare attributes
1712 * @fattr: attributes
1713 * @inode: pointer to inode
a10ad176 1714 *
6f9be83d
TM		 1715 * Attempt to divine whether or not an RPC call reply carrying stale
1716 * attributes got scheduled after another call carrying updated ones.
a10ad176 1717 *
6f9be83d
TM		 1718 * We assume that the server observes strictly monotonic semantics for
1719 * the change attribute, so a larger value means that the attributes in
1720 * @fattr are more recent, in which case the function returns the
1721 * value '1'.
1722 * A return value of '-1' means that the attributes in @inode are
1723 * more recent or unchanged.
a10ad176 1724 */
6f9be83d
TM		 1725static int nfs_inode_attrs_cmp_strict_monotonic(const struct nfs_fattr *fattr,
1726 const struct inode *inode)
a10ad176 1727{
6f9be83d
TM		 1728 return nfs_inode_attrs_cmp_monotonic(fattr, inode) > 0 ? 1 : -1;
1729}
a10ad176 1730
6f9be83d
TM		 1731/**
1732 * nfs_inode_attrs_cmp - compare attributes
1733 * @fattr: attributes
1734 * @inode: pointer to inode
1735 *
1736 * This function returns '1' if it thinks the attributes in @fattr are
1737 * more recent than the ones cached in @inode. It returns '-1' if
1738 * the attributes in @inode are more recent than the ones in @fattr,
1739 * and it returns 0 if not sure.
1740 */
1741static int nfs_inode_attrs_cmp(const struct nfs_fattr *fattr,
1742 const struct inode *inode)
1743{
1744 if (nfs_inode_attrs_cmp_generic(fattr, inode) > 0)
1745 return 1;
1746 switch (NFS_SERVER(inode)->change_attr_type) {
1747 case NFS4_CHANGE_TYPE_IS_UNDEFINED:
1748 break;
1749 case NFS4_CHANGE_TYPE_IS_TIME_METADATA:
1750 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1751 break;
1752 return nfs_inode_attrs_cmp_monotonic(fattr, inode);
1753 default:
1754 if (!(fattr->valid & NFS_ATTR_FATTR_CHANGE))
1755 break;
1756 return nfs_inode_attrs_cmp_strict_monotonic(fattr, inode);
1757 }
1758 return 0;
1759}
1760
7b24dacf
TM		 1761/**
1762 * nfs_inode_finish_partial_attr_update - complete a previous inode update
1763 * @fattr: attributes
1764 * @inode: pointer to inode
1765 *
1766 * Returns '1' if the last attribute update left the inode cached
1767 * attributes in a partially unrevalidated state, and @fattr
1768 * matches the change attribute of that partial update.
1769 * Otherwise returns '0'.
1770 */
1771static int nfs_inode_finish_partial_attr_update(const struct nfs_fattr *fattr,
1772 const struct inode *inode)
1773{
1774 const unsigned long check_valid =
1775 NFS_INO_INVALID_ATIME | NFS_INO_INVALID_CTIME |
1776 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
1777 NFS_INO_INVALID_BLOCKS | NFS_INO_INVALID_OTHER |
1778 NFS_INO_INVALID_NLINK;
1779 unsigned long cache_validity = NFS_I(inode)->cache_validity;
1780
1781 if (!(cache_validity & NFS_INO_INVALID_CHANGE) &&
1782 (cache_validity & check_valid) != 0 &&
1783 (fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1784 nfs_inode_attrs_cmp_monotonic(fattr, inode) == 0)
1785 return 1;
1786 return 0;
a10ad176
TM		 1787}
1788
6f9be83d
TM		 1789static int nfs_refresh_inode_locked(struct inode *inode,
1790 struct nfs_fattr *fattr)
a10ad176 1791{
6f9be83d
TM		 1792 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
1793 int ret = 0;
f4ce1299
TM		 1794
1795 trace_nfs_refresh_inode_enter(inode);
1796
7b24dacf 1797 if (attr_cmp > 0 || nfs_inode_finish_partial_attr_update(fattr, inode))
f4ce1299 1798 ret = nfs_update_inode(inode, fattr);
6f9be83d 1799 else if (attr_cmp == 0)
f4ce1299
TM		 1800 ret = nfs_check_inode_attributes(inode, fattr);
1801
1802 trace_nfs_refresh_inode_exit(inode, ret);
1803 return ret;
870a5be8
TM		 1804}
1805
33801147
TM		 1806/**
1807 * nfs_refresh_inode - try to update the inode attribute cache
302fad7b
TM		 1808 * @inode: pointer to inode
1809 * @fattr: updated attributes
33801147
TM		 1810 *
1811 * Check that an RPC call that returned attributes has not overlapped with
1812 * other recent updates of the inode metadata, then decide whether it is
1813 * safe to do a full update of the inode attributes, or whether just to
1814 * call nfs_check_inode_attributes.
1815 */
1816int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1817{
33801147
TM		 1818 int status;
1819
1820 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1821 return 0;
1822 spin_lock(&inode->i_lock);
870a5be8 1823 status = nfs_refresh_inode_locked(inode, fattr);
33801147 1824 spin_unlock(&inode->i_lock);
ef79c097 1825
33801147
TM		 1826 return status;
1827}
ddda8e0a 1828EXPORT_SYMBOL_GPL(nfs_refresh_inode);
33801147 1829
16e14375
TM		 1830static int nfs_post_op_update_inode_locked(struct inode *inode,
1831 struct nfs_fattr *fattr, unsigned int invalid)
d65f557f 1832{
6edf9609
TM		 1833 if (S_ISDIR(inode->i_mode))
1834 invalid |= NFS_INO_INVALID_DATA;
1835 nfs_set_cache_invalid(inode, invalid);
d65f557f
TM		 1836 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1837 return 0;
1838 return nfs_refresh_inode_locked(inode, fattr);
1839}
1840
decf491f
TM		 1841/**
1842 * nfs_post_op_update_inode - try to update the inode attribute cache
302fad7b
TM		 1843 * @inode: pointer to inode
1844 * @fattr: updated attributes
decf491f
TM		 1845 *
1846 * After an operation that has changed the inode metadata, mark the
1847 * attribute cache as being invalid, then try to update it.
f551e44f
CL		 1848 *
1849 * NB: if the server didn't return any post op attributes, this
1850 * function will force the retrieval of attributes before the next
1851 * NFS request. Thus it should be used only for operations that
1852 * are expected to change one or more attributes, to avoid
1853 * unnecessary NFS requests and trips through nfs_update_inode().
decf491f
TM		 1854 */
1855int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1856{
d65f557f 1857 int status;
decf491f 1858
7668fdbe 1859 spin_lock(&inode->i_lock);
92d64e47 1860 nfs_fattr_set_barrier(fattr);
16e14375
TM		 1861 status = nfs_post_op_update_inode_locked(inode, fattr,
1862 NFS_INO_INVALID_CHANGE
d554168f
TM		 1863 | NFS_INO_INVALID_CTIME
1864 | NFS_INO_REVAL_FORCED);
7668fdbe 1865 spin_unlock(&inode->i_lock);
aa9c2669 1866
870a5be8 1867 return status;
decf491f 1868}
1c606fb7 1869EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
decf491f 1870
70ca8852 1871/**
a08a8cd3 1872 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
302fad7b
TM		 1873 * @inode: pointer to inode
1874 * @fattr: updated attributes
70ca8852
TM		 1875 *
1876 * After an operation that has changed the inode metadata, mark the
1877 * attribute cache as being invalid, then try to update it. Fake up
1878 * weak cache consistency data, if none exist.
1879 *
1880 * This function is mainly designed to be used by the ->write_done() functions.
1881 */
a08a8cd3 1882int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
70ca8852 1883{
6f9be83d 1884 int attr_cmp = nfs_inode_attrs_cmp(fattr, inode);
d65f557f
TM		 1885 int status;
1886
d65f557f 1887 /* Don't do a WCC update if these attributes are already stale */
6f9be83d
TM		 1888 if (attr_cmp < 0)
1889 return 0;
1890 if ((fattr->valid & NFS_ATTR_FATTR) == 0 || !attr_cmp) {
9e6e70f8
TM		 1891 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1892 | NFS_ATTR_FATTR_PRESIZE
1893 | NFS_ATTR_FATTR_PREMTIME
1894 | NFS_ATTR_FATTR_PRECTIME);
d65f557f
TM		 1895 goto out_noforce;
1896 }
9e6e70f8
TM		 1897 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1898 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1eb5d98f 1899 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
9e6e70f8 1900 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
70ca8852 1901 }
9e6e70f8
TM		 1902 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1903 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
e86d5a02 1904 fattr->pre_ctime = inode->i_ctime;
9e6e70f8
TM		 1905 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1906 }
1907 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1908 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
e86d5a02 1909 fattr->pre_mtime = inode->i_mtime;
9e6e70f8
TM		 1910 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1911 }
1912 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1913 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
a3d01454 1914 fattr->pre_size = i_size_read(inode);
9e6e70f8 1915 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
70ca8852 1916 }
d65f557f 1917out_noforce:
16e14375
TM		 1918 status = nfs_post_op_update_inode_locked(inode, fattr,
1919 NFS_INO_INVALID_CHANGE
1920 | NFS_INO_INVALID_CTIME
3a39e778
ZB		 1921 | NFS_INO_INVALID_MTIME
1922 | NFS_INO_INVALID_BLOCKS);
a08a8cd3
TM		 1923 return status;
1924}
1925
1926/**
1927 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
302fad7b
TM		 1928 * @inode: pointer to inode
1929 * @fattr: updated attributes
a08a8cd3
TM		 1930 *
1931 * After an operation that has changed the inode metadata, mark the
1932 * attribute cache as being invalid, then try to update it. Fake up
1933 * weak cache consistency data, if none exist.
1934 *
1935 * This function is mainly designed to be used by the ->write_done() functions.
1936 */
1937int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1938{
1939 int status;
1940
1941 spin_lock(&inode->i_lock);
8f8ba1d7 1942 nfs_fattr_set_barrier(fattr);
a08a8cd3 1943 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
d65f557f
TM		 1944 spin_unlock(&inode->i_lock);
1945 return status;
70ca8852 1946}
ddda8e0a 1947EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
70ca8852 1948
ea96d1ec 1949
1da177e4
LT		 1950/*
1951 * Many nfs protocol calls return the new file attributes after
1952 * an operation. Here we update the inode to reflect the state
1953 * of the server's inode.
1954 *
1955 * This is a bit tricky because we have to make sure all dirty pages
1956 * have been sent off to the server before calling invalidate_inode_pages.
1957 * To make sure no other process adds more write requests while we try
1958 * our best to flush them, we make them sleep during the attribute refresh.
1959 *
1960 * A very similar scenario holds for the dir cache.
1961 */
24aa1fe6 1962static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1da177e4 1963{
ce62b114 1964 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1965 struct nfs_inode *nfsi = NFS_I(inode);
951a143b 1966 loff_t cur_isize, new_isize;
ce62b114 1967 u64 fattr_supported = server->fattr_valid;
2a3f5fd4 1968 unsigned long invalid = 0;
3e7d950a 1969 unsigned long now = jiffies;
62ab460c 1970 unsigned long save_cache_validity;
651b0e70 1971 bool have_writers = nfs_file_has_buffered_writers(nfsi);
944171cb 1972 bool cache_revalidated = true;
0b467264 1973 bool attr_changed = false;
c80d17c5 1974 bool have_delegation;
1da177e4 1975
1e8968c5 1976 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
3110ff80 1977 __func__, inode->i_sb->s_id, inode->i_ino,
4f1abd22 1978 nfs_display_fhandle_hash(NFS_FH(inode)),
1da177e4
LT		 1979 atomic_read(&inode->i_count), fattr->valid);
1980
eb3d8f42
TM		 1981 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1982 /* Only a mounted-on-fileid? Just exit */
1983 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1984 return 0;
7e10cc25 1985 /* Has the inode gone and changed behind our back? */
eb3d8f42 1986 } else if (nfsi->fileid != fattr->fileid) {
7e10cc25
TM		 1987 /* Is this perhaps the mounted-on fileid? */
1988 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1989 nfsi->fileid == fattr->mounted_on_fileid)
1990 return 0;
e73e6c9e
MT		 1991 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1992 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1993 NFS_SERVER(inode)->nfs_client->cl_hostname,
1994 inode->i_sb->s_id, (long long)nfsi->fileid,
1995 (long long)fattr->fileid);
1996 goto out_err;
1997 }
1da177e4
LT		 1998
1999 /*
2000 * Make sure the inode's type hasn't changed.
2001 */
6e3e2c43 2002 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && inode_wrong_type(inode, fattr->mode)) {
e73e6c9e
MT		 2003 /*
2004 * Big trouble! The inode has become a different object.
2005 */
1e8968c5 2006 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
e73e6c9e
MT		 2007 __func__, inode->i_ino, inode->i_mode, fattr->mode);
2008 goto out_err;
2009 }
1da177e4 2010
a0356862 2011 /* Update the fsid? */
9e6e70f8 2012 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
c37dcd33 2013 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
36d43a43 2014 !IS_AUTOMOUNT(inode))
8b4bdcf8
TM		 2015 server->fsid = fattr->fsid;
2016
c80d17c5
TM		 2017 /* Save the delegation state before clearing cache_validity */
2018 have_delegation = nfs_have_delegated_attributes(inode);
2019
1da177e4
LT		 2020 /*
2021 * Update the read time so we don't revalidate too often.
2022 */
33801147 2023 nfsi->read_cache_jiffies = fattr->time_start;
3e7d950a 2024
62ab460c
TM		 2025 save_cache_validity = nfsi->cache_validity;
2026 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
2027 | NFS_INO_INVALID_ATIME
2028 | NFS_INO_REVAL_FORCED
3a39e778 2029 | NFS_INO_INVALID_BLOCKS);
1da177e4 2030
a895b4a1 2031 /* Do atomic weak cache consistency updates */
783b194c 2032 nfs_wcc_update_inode(inode, fattr);
a895b4a1 2033
944171cb 2034 if (pnfs_layoutcommit_outstanding(inode)) {
709fa576
TM		 2035 nfsi->cache_validity |=
2036 save_cache_validity &
2037 (NFS_INO_INVALID_CHANGE | NFS_INO_INVALID_CTIME |
2038 NFS_INO_INVALID_MTIME | NFS_INO_INVALID_SIZE |
cc7f2dae 2039 NFS_INO_INVALID_BLOCKS);
944171cb
BC		 2040 cache_revalidated = false;
2041 }
10b7e9ad 2042
47aabaa7 2043 /* More cache consistency checks */
9e6e70f8 2044 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
c472c07b 2045 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
38512aa9 2046 /* Could it be a race with writeback? */
c80d17c5 2047 if (!(have_writers || have_delegation)) {
0b467264 2048 invalid |= NFS_INO_INVALID_DATA
38512aa9 2049 | NFS_INO_INVALID_ACCESS
95ad37f9
FL		 2050 | NFS_INO_INVALID_ACL
2051 | NFS_INO_INVALID_XATTR;
cac88f94 2052 /* Force revalidate of all attributes */
16e14375
TM		 2053 save_cache_validity |= NFS_INO_INVALID_CTIME
2054 | NFS_INO_INVALID_MTIME
2055 | NFS_INO_INVALID_SIZE
4cdfeb64 2056 | NFS_INO_INVALID_BLOCKS
fabf2b34 2057 | NFS_INO_INVALID_NLINK
720869eb 2058 | NFS_INO_INVALID_MODE
16e14375 2059 | NFS_INO_INVALID_OTHER;
38512aa9
TM		 2060 if (S_ISDIR(inode->i_mode))
2061 nfs_force_lookup_revalidate(inode);
a9601ac5 2062 attr_changed = true;
c80d17c5
TM		 2063 dprintk("NFS: change_attr change on server for file %s/%ld\n",
2064 inode->i_sb->s_id,
2065 inode->i_ino);
1c341b77
TM		 2066 } else if (!have_delegation)
2067 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1eb5d98f 2068 inode_set_iversion_raw(inode, fattr->change_attr);
9e6e70f8 2069 }
ade14a7d 2070 } else {
cc7f2dae
TM		 2071 nfsi->cache_validity |=
2072 save_cache_validity & NFS_INO_INVALID_CHANGE;
213bb584
TM		 2073 if (!have_delegation ||
2074 (nfsi->cache_validity & NFS_INO_INVALID_CHANGE) != 0)
2075 cache_revalidated = false;
ade14a7d 2076 }
9e6e70f8 2077
213bb584 2078 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
e86d5a02 2079 inode->i_mtime = fattr->mtime;
213bb584 2080 else if (fattr_supported & NFS_ATTR_FATTR_MTIME)
cc7f2dae
TM		 2081 nfsi->cache_validity |=
2082 save_cache_validity & NFS_INO_INVALID_MTIME;
62ab460c 2083
213bb584 2084 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
e86d5a02 2085 inode->i_ctime = fattr->ctime;
213bb584 2086 else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
cc7f2dae
TM		 2087 nfsi->cache_validity |=
2088 save_cache_validity & NFS_INO_INVALID_CTIME;
47aabaa7 2089
951a143b 2090 /* Check if our cached file size is stale */
9e6e70f8
TM		 2091 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
2092 new_isize = nfs_size_to_loff_t(fattr->size);
2093 cur_isize = i_size_read(inode);
c80d17c5 2094 if (new_isize != cur_isize && !have_delegation) {
9e6e70f8
TM		 2095 /* Do we perhaps have any outstanding writes, or has
2096 * the file grown beyond our last write? */
a6b6d5b8 2097 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
9e6e70f8 2098 i_size_write(inode, new_isize);
ca0daa27 2099 if (!have_writers)
16e14375 2100 invalid |= NFS_INO_INVALID_DATA;
9e6e70f8 2101 }
60c16ea8
HJ		 2102 dprintk("NFS: isize change on server for file %s/%ld "
2103 "(%Ld to %Ld)\n",
2104 inode->i_sb->s_id,
2105 inode->i_ino,
2106 (long long)cur_isize,
2107 (long long)new_isize);
1da177e4 2108 }
4cdfeb64
TM		 2109 if (new_isize == 0 &&
2110 !(fattr->valid & (NFS_ATTR_FATTR_SPACE_USED |
2111 NFS_ATTR_FATTR_BLOCKS_USED))) {
2112 fattr->du.nfs3.used = 0;
2113 fattr->valid |= NFS_ATTR_FATTR_SPACE_USED;
2114 }
213bb584 2115 } else
cc7f2dae
TM		 2116 nfsi->cache_validity |=
2117 save_cache_validity & NFS_INO_INVALID_SIZE;
1da177e4 2118
9e6e70f8 2119 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
e86d5a02 2120 inode->i_atime = fattr->atime;
213bb584 2121 else if (fattr_supported & NFS_ATTR_FATTR_ATIME)
cc7f2dae
TM		 2122 nfsi->cache_validity |=
2123 save_cache_validity & NFS_INO_INVALID_ATIME;
1da177e4 2124
9e6e70f8
TM		 2125 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
2126 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
9b4b3513
TM		 2127 umode_t newmode = inode->i_mode & S_IFMT;
2128 newmode |= fattr->mode & S_IALLUGO;
2129 inode->i_mode = newmode;
16e14375 2130 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2131 | NFS_INO_INVALID_ACL;
9e6e70f8 2132 }
213bb584 2133 } else if (fattr_supported & NFS_ATTR_FATTR_MODE)
cc7f2dae
TM		 2134 nfsi->cache_validity |=
2135 save_cache_validity & NFS_INO_INVALID_MODE;
62ab460c 2136
9e6e70f8 2137 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
9ff593c4 2138 if (!uid_eq(inode->i_uid, fattr->uid)) {
16e14375 2139 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2140 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2141 inode->i_uid = fattr->uid;
2142 }
213bb584 2143 } else if (fattr_supported & NFS_ATTR_FATTR_OWNER)
cc7f2dae
TM		 2144 nfsi->cache_validity |=
2145 save_cache_validity & NFS_INO_INVALID_OTHER;
62ab460c 2146
9e6e70f8 2147 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
9ff593c4 2148 if (!gid_eq(inode->i_gid, fattr->gid)) {
16e14375 2149 invalid |= NFS_INO_INVALID_ACCESS
0b467264 2150 | NFS_INO_INVALID_ACL;
9e6e70f8
TM		 2151 inode->i_gid = fattr->gid;
2152 }
213bb584 2153 } else if (fattr_supported & NFS_ATTR_FATTR_GROUP)
cc7f2dae
TM		 2154 nfsi->cache_validity |=
2155 save_cache_validity & NFS_INO_INVALID_OTHER;
921615f1 2156
9e6e70f8
TM		 2157 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
2158 if (inode->i_nlink != fattr->nlink) {
9e6e70f8
TM		 2159 if (S_ISDIR(inode->i_mode))
2160 invalid |= NFS_INO_INVALID_DATA;
bfe86848 2161 set_nlink(inode, fattr->nlink);
9e6e70f8 2162 }
213bb584 2163 } else if (fattr_supported & NFS_ATTR_FATTR_NLINK)
cc7f2dae
TM		 2164 nfsi->cache_validity |=
2165 save_cache_validity & NFS_INO_INVALID_NLINK;
1da177e4 2166
9e6e70f8 2167 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1da177e4
LT		 2168 /*
2169 * report the blocks in 512byte units
2170 */
2171 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
213bb584 2172 } else if (fattr_supported & NFS_ATTR_FATTR_SPACE_USED)
ce62b114
TM		 2173 nfsi->cache_validity |=
2174 save_cache_validity & NFS_INO_INVALID_BLOCKS;
ce62b114 2175
213bb584 2176 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
9e6e70f8 2177 inode->i_blocks = fattr->du.nfs2.blocks;
213bb584 2178 else if (fattr_supported & NFS_ATTR_FATTR_BLOCKS_USED)
cc7f2dae
TM		 2179 nfsi->cache_validity |=
2180 save_cache_validity & NFS_INO_INVALID_BLOCKS;
1da177e4
LT		 2181
2182 /* Update attrtimeo value if we're out of the unstable period */
0b467264 2183 if (attr_changed) {
91d5b470 2184 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1da177e4 2185 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
3e7d950a 2186 nfsi->attrtimeo_timestamp = now;
f5062003 2187 /* Set barrier to be more recent than all outstanding updates */
4704f0e2 2188 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
6d2b2966 2189 } else {
ade14a7d
TM		 2190 if (cache_revalidated) {
2191 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2192 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2193 nfsi->attrtimeo <<= 1;
2194 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2195 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2196 }
6d2b2966
TM		 2197 nfsi->attrtimeo_timestamp = now;
2198 }
f5062003 2199 /* Set the barrier to be more recent than this fattr */
9fdbfad1 2200 if ((long)(fattr->gencount - nfsi->attr_gencount) > 0)
f5062003 2201 nfsi->attr_gencount = fattr->gencount;
1da177e4 2202 }
c812012f 2203
1da177e4
LT		 2204 /* Don't invalidate the data if we were to blame */
2205 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2206 || S_ISLNK(inode->i_mode)))
2207 invalid &= ~NFS_INO_INVALID_DATA;
c80d17c5 2208 nfs_set_cache_invalid(inode, invalid);
de242c0b 2209
1da177e4 2210 return 0;
b37b03b7 2211 out_err:
1da177e4
LT		 2212 /*
2213 * No need to worry about unhashing the dentry, as the
2214 * lookup validation will know that the inode is bad.
2215 * (But we fall through to invalidate the caches.)
2216 */
93ce4af7 2217 nfs_set_inode_stale_locked(inode);
1da177e4
LT		 2218 return -ESTALE;
2219}
2220
f7b422b1 2221struct inode *nfs_alloc_inode(struct super_block *sb)
1da177e4
LT		 2222{
2223 struct nfs_inode *nfsi;
c456aacf 2224 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1da177e4
LT		 2225 if (!nfsi)
2226 return NULL;
55296809
CL		 2227 nfsi->flags = 0UL;
2228 nfsi->cache_validity = 0UL;
89d77c8f 2229#if IS_ENABLED(CONFIG_NFS_V4)
e50a1c2e
BF		 2230 nfsi->nfs4_acl = NULL;
2231#endif /* CONFIG_NFS_V4 */
95ad37f9
FL		 2232#ifdef CONFIG_NFS_V4_2
2233 nfsi->xattr_cache = NULL;
2234#endif
1da177e4
LT		 2235 return &nfsi->vfs_inode;
2236}
89d77c8f 2237EXPORT_SYMBOL_GPL(nfs_alloc_inode);
1da177e4 2238
ca1a199e 2239void nfs_free_inode(struct inode *inode)
1da177e4
LT		 2240{
2241 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2242}
ca1a199e 2243EXPORT_SYMBOL_GPL(nfs_free_inode);
fa0d7e3d 2244
d75d5414
AM		 2245static inline void nfs4_init_once(struct nfs_inode *nfsi)
2246{
89d77c8f 2247#if IS_ENABLED(CONFIG_NFS_V4)
d75d5414
AM		 2248 INIT_LIST_HEAD(&nfsi->open_states);
2249 nfsi->delegation = NULL;
d75d5414 2250 init_rwsem(&nfsi->rwsem);
e5e94017 2251 nfsi->layout = NULL;
d75d5414
AM		 2252#endif
2253}
f7b422b1 2254
51cc5068 2255static void init_once(void *foo)
1da177e4
LT		 2256{
2257 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2258
a35afb83 2259 inode_init_once(&nfsi->vfs_inode);
a35afb83
CL		 2260 INIT_LIST_HEAD(&nfsi->open_files);
2261 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2262 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
ea2cf228 2263 INIT_LIST_HEAD(&nfsi->commit_info.list);
a6b6d5b8 2264 atomic_long_set(&nfsi->nrequests, 0);
5cb953d4 2265 atomic_long_set(&nfsi->commit_info.ncommit, 0);
1a0de48a 2266 atomic_set(&nfsi->commit_info.rpcs_out, 0);
884be175 2267 init_rwsem(&nfsi->rmdir_sem);
e824f99a 2268 mutex_init(&nfsi->commit_mutex);
a35afb83 2269 nfs4_init_once(nfsi);
efeda80d 2270 nfsi->cache_change_attribute = 0;
1da177e4 2271}
20c2df83 2272
f7b422b1 2273static int __init nfs_init_inodecache(void)
1da177e4
LT		 2274{
2275 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2276 sizeof(struct nfs_inode),
fffb60f9 2277 0, (SLAB_RECLAIM_ACCOUNT|
5d097056 2278 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
20c2df83 2279 init_once);
1da177e4
LT		 2280 if (nfs_inode_cachep == NULL)
2281 return -ENOMEM;
2282
2283 return 0;
2284}
2285
266bee88 2286static void nfs_destroy_inodecache(void)
1da177e4 2287{
8c0a8537
KS		 2288 /*
2289 * Make sure all delayed rcu free inodes are flushed before we
2290 * destroy cache.
2291 */
2292 rcu_barrier();
1a1d92c1 2293 kmem_cache_destroy(nfs_inode_cachep);
1da177e4
LT		 2294}
2295
5746006f 2296struct workqueue_struct *nfsiod_workqueue;
89d77c8f 2297EXPORT_SYMBOL_GPL(nfsiod_workqueue);
5746006f
TM		 2298
2299/*
2300 * start up the nfsiod workqueue
2301 */
2302static int nfsiod_start(void)
2303{
2304 struct workqueue_struct *wq;
2305 dprintk("RPC: creating workqueue nfsiod\n");
bf701b76 2306 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
5746006f
TM		 2307 if (wq == NULL)
2308 return -ENOMEM;
2309 nfsiod_workqueue = wq;
2310 return 0;
2311}
2312
2313/*
2314 * Destroy the nfsiod workqueue
2315 */
2316static void nfsiod_stop(void)
2317{
2318 struct workqueue_struct *wq;
2319
2320 wq = nfsiod_workqueue;
2321 if (wq == NULL)
2322 return;
2323 nfsiod_workqueue = NULL;
2324 destroy_workqueue(wq);
2325}
2326
c7d03a00 2327unsigned int nfs_net_id;
9e2e74db 2328EXPORT_SYMBOL_GPL(nfs_net_id);
1b340d01
SK		 2329
2330static int nfs_net_init(struct net *net)
2331{
6b13168b 2332 nfs_clients_init(net);
65b38851 2333 return nfs_fs_proc_net_init(net);
1b340d01
SK		 2334}
2335
2336static void nfs_net_exit(struct net *net)
2337{
65b38851 2338 nfs_fs_proc_net_exit(net);
10b7a70c 2339 nfs_clients_exit(net);
1b340d01
SK		 2340}
2341
2342static struct pernet_operations nfs_net_ops = {
2343 .init = nfs_net_init,
2344 .exit = nfs_net_exit,
2345 .id = &nfs_net_id,
2346 .size = sizeof(struct nfs_net),
2347};
2348
1da177e4
LT		 2349/*
2350 * Initialize NFS
2351 */
2352static int __init init_nfs_fs(void)
2353{
2354 int err;
2355
996bc4f4
TM		 2356 err = nfs_sysfs_init();
2357 if (err < 0)
2358 goto out10;
2359
1b340d01 2360 err = register_pernet_subsys(&nfs_net_ops);
e571cbf1 2361 if (err < 0)
89d77c8f 2362 goto out9;
e571cbf1 2363
8ec442ae
DH		 2364 err = nfs_fscache_register();
2365 if (err < 0)
89d77c8f 2366 goto out8;
8ec442ae 2367
5746006f
TM		 2368 err = nfsiod_start();
2369 if (err)
89d77c8f 2370 goto out7;
5746006f 2371
6aaca566
DH		 2372 err = nfs_fs_proc_init();
2373 if (err)
89d77c8f 2374 goto out6;
6aaca566 2375
1da177e4
LT		 2376 err = nfs_init_nfspagecache();
2377 if (err)
89d77c8f 2378 goto out5;
1da177e4
LT		 2379
2380 err = nfs_init_inodecache();
2381 if (err)
89d77c8f 2382 goto out4;
1da177e4
LT		 2383
2384 err = nfs_init_readpagecache();
2385 if (err)
89d77c8f 2386 goto out3;
1da177e4
LT		 2387
2388 err = nfs_init_writepagecache();
2389 if (err)
89d77c8f 2390 goto out2;
1da177e4 2391
1da177e4
LT		 2392 err = nfs_init_directcache();
2393 if (err)
89d77c8f 2394 goto out1;
1da177e4 2395
ec7652aa 2396 rpc_proc_register(&init_net, &nfs_rpcstat);
cd738ee9
KM		 2397
2398 err = register_nfs_fs();
2399 if (err)
129d1977
BS		 2400 goto out0;
2401
1da177e4 2402 return 0;
129d1977 2403out0:
ec7652aa 2404 rpc_proc_unregister(&init_net, "nfs");
1da177e4 2405 nfs_destroy_directcache();
89d77c8f 2406out1:
129d1977 2407 nfs_destroy_writepagecache();
89d77c8f 2408out2:
129d1977 2409 nfs_destroy_readpagecache();
89d77c8f 2410out3:
129d1977 2411 nfs_destroy_inodecache();
89d77c8f 2412out4:
129d1977 2413 nfs_destroy_nfspagecache();
89d77c8f 2414out5:
129d1977 2415 nfs_fs_proc_exit();
89d77c8f 2416out6:
129d1977 2417 nfsiod_stop();
89d77c8f 2418out7:
129d1977 2419 nfs_fscache_unregister();
89d77c8f 2420out8:
129d1977 2421 unregister_pernet_subsys(&nfs_net_ops);
89d77c8f 2422out9:
996bc4f4
TM		 2423 nfs_sysfs_exit();
2424out10:
1da177e4
LT		 2425 return err;
2426}
2427
2428static void __exit exit_nfs_fs(void)
2429{
1da177e4 2430 nfs_destroy_directcache();
1da177e4
LT		 2431 nfs_destroy_writepagecache();
2432 nfs_destroy_readpagecache();
2433 nfs_destroy_inodecache();
2434 nfs_destroy_nfspagecache();
8ec442ae 2435 nfs_fscache_unregister();
1b340d01 2436 unregister_pernet_subsys(&nfs_net_ops);
ec7652aa 2437 rpc_proc_unregister(&init_net, "nfs");
f7b422b1 2438 unregister_nfs_fs();
6aaca566 2439 nfs_fs_proc_exit();
5746006f 2440 nfsiod_stop();
996bc4f4 2441 nfs_sysfs_exit();
1da177e4
LT		 2442}
2443
2444/* Not quite true; I just maintain it */
2445MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2446MODULE_LICENSE("GPL");
f43bf0be 2447module_param(enable_ino64, bool, 0644);
1da177e4
LT		 2448
2449module_init(init_nfs_fs)
2450module_exit(exit_nfs_fs)
Linux 6.x block layer and io_uring tree(s)