1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 1992 Rick Sladkey
7 * nfs inode and superblock handling functions
9 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
10 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
12 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
13 * J.S.Peatfield@damtp.cam.ac.uk
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/sched/signal.h>
20 #include <linux/time.h>
21 #include <linux/kernel.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>
29 #include <linux/sunrpc/metrics.h>
30 #include <linux/nfs_fs.h>
31 #include <linux/nfs_mount.h>
32 #include <linux/nfs4_mount.h>
33 #include <linux/lockd/bind.h>
34 #include <linux/seq_file.h>
35 #include <linux/mount.h>
36 #include <linux/vfs.h>
37 #include <linux/inet.h>
38 #include <linux/nfs_xdr.h>
39 #include <linux/slab.h>
40 #include <linux/compat.h>
41 #include <linux/freezer.h>
42 #include <linux/uaccess.h>
43 #include <linux/iversion.h>
47 #include "delegation.h"
58 #define NFSDBG_FACILITY NFSDBG_VFS
60 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
62 /* Default is to see 64-bit inode numbers */
63 static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
65 static void nfs_invalidate_inode(struct inode *);
66 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
68 static struct kmem_cache * nfs_inode_cachep;
70 static inline unsigned long
71 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
73 return nfs_fileid_to_ino_t(fattr->fileid);
76 static int nfs_wait_killable(int mode)
78 freezable_schedule_unsafe();
79 if (signal_pending_state(mode, current))
84 int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
86 return nfs_wait_killable(mode);
88 EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
91 * nfs_compat_user_ino64 - returns the user-visible inode number
92 * @fileid: 64-bit fileid
94 * This function returns a 32-bit inode number if the boot parameter
95 * nfs.enable_ino64 is zero.
97 u64 nfs_compat_user_ino64(u64 fileid)
108 if (sizeof(ino) < sizeof(fileid))
109 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
113 int nfs_drop_inode(struct inode *inode)
115 return NFS_STALE(inode) || generic_drop_inode(inode);
117 EXPORT_SYMBOL_GPL(nfs_drop_inode);
119 void nfs_clear_inode(struct inode *inode)
122 * The following should never happen...
124 WARN_ON_ONCE(nfs_have_writebacks(inode));
125 WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
126 nfs_zap_acl_cache(inode);
127 nfs_access_zap_cache(inode);
128 nfs_fscache_clear_inode(inode);
130 EXPORT_SYMBOL_GPL(nfs_clear_inode);
132 void nfs_evict_inode(struct inode *inode)
134 truncate_inode_pages_final(&inode->i_data);
136 nfs_clear_inode(inode);
139 int nfs_sync_inode(struct inode *inode)
141 inode_dio_wait(inode);
142 return nfs_wb_all(inode);
144 EXPORT_SYMBOL_GPL(nfs_sync_inode);
147 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
148 * @mapping: pointer to struct address_space
150 int nfs_sync_mapping(struct address_space *mapping)
154 if (mapping->nrpages != 0) {
155 unmap_mapping_range(mapping, 0, 0, 0);
156 ret = nfs_wb_all(mapping->host);
161 static int nfs_attribute_timeout(struct inode *inode)
163 struct nfs_inode *nfsi = NFS_I(inode);
165 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
168 static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags)
170 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
172 /* Special case for the pagecache or access cache */
173 if (flags == NFS_INO_REVAL_PAGECACHE &&
174 !(cache_validity & NFS_INO_REVAL_FORCED))
176 return (cache_validity & flags) != 0;
179 static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags)
181 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
183 if ((cache_validity & flags) != 0)
185 if (nfs_attribute_timeout(inode))
190 bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
192 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
193 return nfs_check_cache_invalid_delegated(inode, flags);
195 return nfs_check_cache_invalid_not_delegated(inode, flags);
198 static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
200 struct nfs_inode *nfsi = NFS_I(inode);
201 bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
203 if (have_delegation) {
204 if (!(flags & NFS_INO_REVAL_FORCED))
205 flags &= ~NFS_INO_INVALID_OTHER;
206 flags &= ~(NFS_INO_INVALID_CHANGE
207 | NFS_INO_INVALID_SIZE
208 | NFS_INO_REVAL_PAGECACHE);
211 if (inode->i_mapping->nrpages == 0)
212 flags &= ~(NFS_INO_INVALID_DATA|NFS_INO_DATA_INVAL_DEFER);
213 nfsi->cache_validity |= flags;
214 if (flags & NFS_INO_INVALID_DATA)
215 nfs_fscache_invalidate(inode);
219 * Invalidate the local caches
221 static void nfs_zap_caches_locked(struct inode *inode)
223 struct nfs_inode *nfsi = NFS_I(inode);
224 int mode = inode->i_mode;
226 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
228 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
229 nfsi->attrtimeo_timestamp = jiffies;
231 memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
232 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
233 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
234 | NFS_INO_INVALID_DATA
235 | NFS_INO_INVALID_ACCESS
236 | NFS_INO_INVALID_ACL
237 | NFS_INO_REVAL_PAGECACHE);
239 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
240 | NFS_INO_INVALID_ACCESS
241 | NFS_INO_INVALID_ACL
242 | NFS_INO_REVAL_PAGECACHE);
243 nfs_zap_label_cache_locked(nfsi);
246 void nfs_zap_caches(struct inode *inode)
248 spin_lock(&inode->i_lock);
249 nfs_zap_caches_locked(inode);
250 spin_unlock(&inode->i_lock);
253 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
255 if (mapping->nrpages != 0) {
256 spin_lock(&inode->i_lock);
257 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
258 spin_unlock(&inode->i_lock);
262 void nfs_zap_acl_cache(struct inode *inode)
264 void (*clear_acl_cache)(struct inode *);
266 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
267 if (clear_acl_cache != NULL)
268 clear_acl_cache(inode);
269 spin_lock(&inode->i_lock);
270 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
271 spin_unlock(&inode->i_lock);
273 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
275 void nfs_invalidate_atime(struct inode *inode)
277 spin_lock(&inode->i_lock);
278 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
279 spin_unlock(&inode->i_lock);
281 EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
284 * Invalidate, but do not unhash, the inode.
285 * NB: must be called with inode->i_lock held!
287 static void nfs_invalidate_inode(struct inode *inode)
289 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
290 nfs_zap_caches_locked(inode);
293 struct nfs_find_desc {
295 struct nfs_fattr *fattr;
299 * In NFSv3 we can have 64bit inode numbers. In order to support
300 * this, and re-exported directories (also seen in NFSv2)
301 * we are forced to allow 2 different inodes to have the same
305 nfs_find_actor(struct inode *inode, void *opaque)
307 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
308 struct nfs_fh *fh = desc->fh;
309 struct nfs_fattr *fattr = desc->fattr;
311 if (NFS_FILEID(inode) != fattr->fileid)
313 if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode))
315 if (nfs_compare_fh(NFS_FH(inode), fh))
317 if (is_bad_inode(inode) || NFS_STALE(inode))
323 nfs_init_locked(struct inode *inode, void *opaque)
325 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
326 struct nfs_fattr *fattr = desc->fattr;
328 set_nfs_fileid(inode, fattr->fileid);
329 inode->i_mode = fattr->mode;
330 nfs_copy_fh(NFS_FH(inode), desc->fh);
334 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
335 static void nfs_clear_label_invalid(struct inode *inode)
337 spin_lock(&inode->i_lock);
338 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
339 spin_unlock(&inode->i_lock);
342 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
343 struct nfs4_label *label)
350 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
351 error = security_inode_notifysecctx(inode, label->label,
354 printk(KERN_ERR "%s() %s %d "
355 "security_inode_notifysecctx() %d\n",
357 (char *)label->label,
359 nfs_clear_label_invalid(inode);
363 struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
365 struct nfs4_label *label = NULL;
366 int minor_version = server->nfs_client->cl_minorversion;
368 if (minor_version < 2)
371 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
374 label = kzalloc(sizeof(struct nfs4_label), flags);
376 return ERR_PTR(-ENOMEM);
378 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
379 if (label->label == NULL) {
381 return ERR_PTR(-ENOMEM);
383 label->len = NFS4_MAXLABELLEN;
387 EXPORT_SYMBOL_GPL(nfs4_label_alloc);
389 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
390 struct nfs4_label *label)
394 EXPORT_SYMBOL_GPL(nfs_setsecurity);
396 /* Search for inode identified by fh, fileid and i_mode in inode cache. */
398 nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
400 struct nfs_find_desc desc = {
407 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
408 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
411 hash = nfs_fattr_to_ino_t(fattr);
412 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
414 dprintk("%s: returning %p\n", __func__, inode);
419 * This is our front-end to iget that looks up inodes by file handle
420 * instead of inode number.
423 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
425 struct nfs_find_desc desc = {
429 struct inode *inode = ERR_PTR(-ENOENT);
432 nfs_attr_check_mountpoint(sb, fattr);
434 if (nfs_attr_use_mounted_on_fileid(fattr))
435 fattr->fileid = fattr->mounted_on_fileid;
436 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
438 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
441 hash = nfs_fattr_to_ino_t(fattr);
443 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
445 inode = ERR_PTR(-ENOMEM);
449 if (inode->i_state & I_NEW) {
450 struct nfs_inode *nfsi = NFS_I(inode);
451 unsigned long now = jiffies;
453 /* We set i_ino for the few things that still rely on it,
457 /* We can't support update_atime(), since the server will reset it */
458 inode->i_flags |= S_NOATIME|S_NOCMTIME;
459 inode->i_mode = fattr->mode;
460 nfsi->cache_validity = 0;
461 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
462 && nfs_server_capable(inode, NFS_CAP_MODE))
463 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
464 /* Why so? Because we want revalidate for devices/FIFOs, and
465 * that's precisely what we have in nfs_file_inode_operations.
467 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
468 if (S_ISREG(inode->i_mode)) {
469 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
470 inode->i_data.a_ops = &nfs_file_aops;
471 } else if (S_ISDIR(inode->i_mode)) {
472 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
473 inode->i_fop = &nfs_dir_operations;
474 inode->i_data.a_ops = &nfs_dir_aops;
475 /* Deal with crossing mountpoints */
476 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
477 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
478 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
479 inode->i_op = &nfs_referral_inode_operations;
481 inode->i_op = &nfs_mountpoint_inode_operations;
483 inode->i_flags |= S_AUTOMOUNT;
485 } else if (S_ISLNK(inode->i_mode)) {
486 inode->i_op = &nfs_symlink_inode_operations;
487 inode_nohighmem(inode);
489 init_special_inode(inode, inode->i_mode, fattr->rdev);
491 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
492 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
493 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
494 inode_set_iversion_raw(inode, 0);
497 inode->i_uid = make_kuid(&init_user_ns, -2);
498 inode->i_gid = make_kgid(&init_user_ns, -2);
500 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
504 nfsi->read_cache_jiffies = fattr->time_start;
505 nfsi->attr_gencount = fattr->gencount;
506 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
507 inode->i_atime = timespec_to_timespec64(fattr->atime);
508 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
509 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
510 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
511 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
512 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
513 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
514 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
515 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
516 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
517 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
518 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
519 inode_set_iversion_raw(inode, fattr->change_attr);
521 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
522 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
523 inode->i_size = nfs_size_to_loff_t(fattr->size);
525 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
526 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
527 set_nlink(inode, fattr->nlink);
528 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
529 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
530 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
531 inode->i_uid = fattr->uid;
532 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
533 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
534 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
535 inode->i_gid = fattr->gid;
536 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
537 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
538 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
539 inode->i_blocks = fattr->du.nfs2.blocks;
540 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
542 * report the blocks in 512byte units
544 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
547 if (nfsi->cache_validity != 0)
548 nfsi->cache_validity |= NFS_INO_REVAL_FORCED;
550 nfs_setsecurity(inode, fattr, label);
552 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
553 nfsi->attrtimeo_timestamp = now;
554 nfsi->access_cache = RB_ROOT;
556 nfs_fscache_init_inode(inode);
558 unlock_new_inode(inode);
560 int err = nfs_refresh_inode(inode, fattr);
563 inode = ERR_PTR(err);
567 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
569 (unsigned long long)NFS_FILEID(inode),
570 nfs_display_fhandle_hash(fh),
571 atomic_read(&inode->i_count));
577 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
580 EXPORT_SYMBOL_GPL(nfs_fhget);
582 #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)
585 nfs_setattr(struct dentry *dentry, struct iattr *attr)
587 struct inode *inode = d_inode(dentry);
588 struct nfs_fattr *fattr;
591 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
593 /* skip mode change if it's just for clearing setuid/setgid */
594 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
595 attr->ia_valid &= ~ATTR_MODE;
597 if (attr->ia_valid & ATTR_SIZE) {
598 BUG_ON(!S_ISREG(inode->i_mode));
600 error = inode_newsize_ok(inode, attr->ia_size);
604 if (attr->ia_size == i_size_read(inode))
605 attr->ia_valid &= ~ATTR_SIZE;
608 /* Optimization: if the end result is no change, don't RPC */
609 attr->ia_valid &= NFS_VALID_ATTRS;
610 if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
613 trace_nfs_setattr_enter(inode);
615 /* Write all dirty data */
616 if (S_ISREG(inode->i_mode))
617 nfs_sync_inode(inode);
619 fattr = nfs_alloc_fattr();
625 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
627 error = nfs_refresh_inode(inode, fattr);
628 nfs_free_fattr(fattr);
630 trace_nfs_setattr_exit(inode, error);
633 EXPORT_SYMBOL_GPL(nfs_setattr);
636 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
637 * @inode: inode of the file used
638 * @offset: file offset to start truncating
640 * This is a copy of the common vmtruncate, but with the locking
641 * corrected to take into account the fact that NFS requires
642 * inode->i_size to be updated under the inode->i_lock.
643 * Note: must be called with inode->i_lock held!
645 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
649 err = inode_newsize_ok(inode, offset);
653 i_size_write(inode, offset);
656 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA |
657 NFS_INO_DATA_INVAL_DEFER);
658 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
660 spin_unlock(&inode->i_lock);
661 truncate_pagecache(inode, offset);
662 spin_lock(&inode->i_lock);
668 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
669 * @inode: pointer to struct inode
670 * @attr: pointer to struct iattr
671 * @fattr: pointer to struct nfs_fattr
673 * Note: we do this in the *proc.c in order to ensure that
674 * it works for things like exclusive creates too.
676 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
677 struct nfs_fattr *fattr)
679 /* Barrier: bump the attribute generation count. */
680 nfs_fattr_set_barrier(fattr);
682 spin_lock(&inode->i_lock);
683 NFS_I(inode)->attr_gencount = fattr->gencount;
684 if ((attr->ia_valid & ATTR_SIZE) != 0) {
685 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
686 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
687 nfs_vmtruncate(inode, attr->ia_size);
689 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
690 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
691 if ((attr->ia_valid & ATTR_MODE) != 0) {
692 int mode = attr->ia_mode & S_IALLUGO;
693 mode |= inode->i_mode & ~S_IALLUGO;
694 inode->i_mode = mode;
696 if ((attr->ia_valid & ATTR_UID) != 0)
697 inode->i_uid = attr->ia_uid;
698 if ((attr->ia_valid & ATTR_GID) != 0)
699 inode->i_gid = attr->ia_gid;
700 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
701 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
703 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
704 | NFS_INO_INVALID_CTIME);
705 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
706 | NFS_INO_INVALID_ACL);
708 if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
709 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
710 | NFS_INO_INVALID_CTIME);
711 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
712 inode->i_atime = timespec_to_timespec64(fattr->atime);
713 else if (attr->ia_valid & ATTR_ATIME_SET)
714 inode->i_atime = attr->ia_atime;
716 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
718 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
719 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
721 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
722 | NFS_INO_INVALID_CTIME);
724 if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
725 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
726 | NFS_INO_INVALID_CTIME);
727 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
728 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
729 else if (attr->ia_valid & ATTR_MTIME_SET)
730 inode->i_mtime = attr->ia_mtime;
732 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
734 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
735 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
737 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
738 | NFS_INO_INVALID_CTIME);
741 nfs_update_inode(inode, fattr);
742 spin_unlock(&inode->i_lock);
744 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
746 static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
748 struct dentry *parent;
750 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
752 parent = dget_parent(dentry);
753 nfs_force_use_readdirplus(d_inode(parent));
757 static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
759 struct dentry *parent;
761 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
763 parent = dget_parent(dentry);
764 nfs_advise_use_readdirplus(d_inode(parent));
768 static bool nfs_need_revalidate_inode(struct inode *inode)
770 if (NFS_I(inode)->cache_validity &
771 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
773 if (nfs_attribute_cache_expired(inode))
778 int nfs_getattr(const struct path *path, struct kstat *stat,
779 u32 request_mask, unsigned int query_flags)
781 struct inode *inode = d_inode(path->dentry);
782 struct nfs_server *server = NFS_SERVER(inode);
783 unsigned long cache_validity;
785 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
786 bool do_update = false;
788 trace_nfs_getattr_enter(inode);
790 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync)
793 /* Flush out writes to the server in order to update c/mtime. */
794 if ((request_mask & (STATX_CTIME|STATX_MTIME)) &&
795 S_ISREG(inode->i_mode)) {
796 err = filemap_write_and_wait(inode->i_mapping);
802 * We may force a getattr if the user cares about atime.
804 * Note that we only have to check the vfsmount flags here:
805 * - NFS always sets S_NOATIME by so checking it would give a
807 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
808 * no point in checking those.
810 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
811 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
812 request_mask &= ~STATX_ATIME;
814 /* Is the user requesting attributes that might need revalidation? */
815 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
816 STATX_MTIME|STATX_UID|STATX_GID|
817 STATX_SIZE|STATX_BLOCKS)))
818 goto out_no_revalidate;
820 /* Check whether the cached attributes are stale */
821 do_update |= force_sync || nfs_attribute_cache_expired(inode);
822 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
823 do_update |= cache_validity &
824 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL);
825 if (request_mask & STATX_ATIME)
826 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
827 if (request_mask & (STATX_CTIME|STATX_MTIME))
828 do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE;
829 if (request_mask & STATX_BLOCKS)
830 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
832 /* Update the attribute cache */
833 if (!(server->flags & NFS_MOUNT_NOAC))
834 nfs_readdirplus_parent_cache_miss(path->dentry);
836 nfs_readdirplus_parent_cache_hit(path->dentry);
837 err = __nfs_revalidate_inode(server, inode);
841 nfs_readdirplus_parent_cache_hit(path->dentry);
843 /* Only return attributes that were revalidated. */
844 stat->result_mask &= request_mask;
846 generic_fillattr(inode, stat);
847 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
848 if (S_ISDIR(inode->i_mode))
849 stat->blksize = NFS_SERVER(inode)->dtsize;
851 trace_nfs_getattr_exit(inode, err);
854 EXPORT_SYMBOL_GPL(nfs_getattr);
856 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
858 refcount_set(&l_ctx->count, 1);
859 l_ctx->lockowner = current->files;
860 INIT_LIST_HEAD(&l_ctx->list);
861 atomic_set(&l_ctx->io_count, 0);
864 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
866 struct nfs_lock_context *pos;
868 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
869 if (pos->lockowner != current->files)
871 if (refcount_inc_not_zero(&pos->count))
877 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
879 struct nfs_lock_context *res, *new = NULL;
880 struct inode *inode = d_inode(ctx->dentry);
883 res = __nfs_find_lock_context(ctx);
886 new = kmalloc(sizeof(*new), GFP_KERNEL);
888 return ERR_PTR(-ENOMEM);
889 nfs_init_lock_context(new);
890 spin_lock(&inode->i_lock);
891 res = __nfs_find_lock_context(ctx);
893 new->open_context = get_nfs_open_context(ctx);
894 if (new->open_context) {
895 list_add_tail_rcu(&new->list,
896 &ctx->lock_context.list);
900 res = ERR_PTR(-EBADF);
902 spin_unlock(&inode->i_lock);
907 EXPORT_SYMBOL_GPL(nfs_get_lock_context);
909 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
911 struct nfs_open_context *ctx = l_ctx->open_context;
912 struct inode *inode = d_inode(ctx->dentry);
914 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
916 list_del_rcu(&l_ctx->list);
917 spin_unlock(&inode->i_lock);
918 put_nfs_open_context(ctx);
919 kfree_rcu(l_ctx, rcu_head);
921 EXPORT_SYMBOL_GPL(nfs_put_lock_context);
924 * nfs_close_context - Common close_context() routine NFSv2/v3
925 * @ctx: pointer to context
926 * @is_sync: is this a synchronous close
928 * Ensure that the attributes are up to date if we're mounted
929 * with close-to-open semantics and we have cached data that will
930 * need to be revalidated on open.
932 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
934 struct nfs_inode *nfsi;
936 struct nfs_server *server;
938 if (!(ctx->mode & FMODE_WRITE))
942 inode = d_inode(ctx->dentry);
943 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
946 if (inode->i_mapping->nrpages == 0)
948 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
950 if (!list_empty(&nfsi->open_files))
952 server = NFS_SERVER(inode);
953 if (server->flags & NFS_MOUNT_NOCTO)
955 nfs_revalidate_inode(server, inode);
957 EXPORT_SYMBOL_GPL(nfs_close_context);
959 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
963 struct nfs_open_context *ctx;
965 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
967 return ERR_PTR(-ENOMEM);
968 nfs_sb_active(dentry->d_sb);
969 ctx->dentry = dget(dentry);
971 ctx->cred = get_cred(filp->f_cred);
973 ctx->cred = get_current_cred();
979 ctx->flock_owner = (fl_owner_t)filp;
980 nfs_init_lock_context(&ctx->lock_context);
981 ctx->lock_context.open_context = ctx;
982 INIT_LIST_HEAD(&ctx->list);
983 ctx->mdsthreshold = NULL;
986 EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
988 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
990 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
994 EXPORT_SYMBOL_GPL(get_nfs_open_context);
996 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
998 struct inode *inode = d_inode(ctx->dentry);
999 struct super_block *sb = ctx->dentry->d_sb;
1001 if (!refcount_dec_and_test(&ctx->lock_context.count))
1003 if (!list_empty(&ctx->list)) {
1004 spin_lock(&inode->i_lock);
1005 list_del_rcu(&ctx->list);
1006 spin_unlock(&inode->i_lock);
1009 NFS_PROTO(inode)->close_context(ctx, is_sync);
1010 put_cred(ctx->cred);
1012 nfs_sb_deactive(sb);
1013 put_rpccred(ctx->ll_cred);
1014 kfree(ctx->mdsthreshold);
1015 kfree_rcu(ctx, rcu_head);
1018 void put_nfs_open_context(struct nfs_open_context *ctx)
1020 __put_nfs_open_context(ctx, 0);
1022 EXPORT_SYMBOL_GPL(put_nfs_open_context);
1024 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1026 __put_nfs_open_context(ctx, 1);
1030 * Ensure that mmap has a recent RPC credential for use when writing out
1033 void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1035 struct inode *inode = d_inode(ctx->dentry);
1036 struct nfs_inode *nfsi = NFS_I(inode);
1038 spin_lock(&inode->i_lock);
1039 if (list_empty(&nfsi->open_files) &&
1040 (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER))
1041 nfsi->cache_validity |= NFS_INO_INVALID_DATA |
1042 NFS_INO_REVAL_FORCED;
1043 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1044 spin_unlock(&inode->i_lock);
1046 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1048 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1050 filp->private_data = get_nfs_open_context(ctx);
1051 if (list_empty(&ctx->list))
1052 nfs_inode_attach_open_context(ctx);
1054 EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1057 * Given an inode, search for an open context with the desired characteristics
1059 struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1061 struct nfs_inode *nfsi = NFS_I(inode);
1062 struct nfs_open_context *pos, *ctx = NULL;
1065 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
1066 if (cred != NULL && pos->cred != cred)
1068 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1070 ctx = get_nfs_open_context(pos);
1078 void nfs_file_clear_open_context(struct file *filp)
1080 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1083 struct inode *inode = d_inode(ctx->dentry);
1086 * We fatal error on write before. Try to writeback
1090 invalidate_inode_pages2(inode->i_mapping);
1091 filp->private_data = NULL;
1092 put_nfs_open_context_sync(ctx);
1097 * These allocate and release file read/write context information.
1099 int nfs_open(struct inode *inode, struct file *filp)
1101 struct nfs_open_context *ctx;
1103 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
1105 return PTR_ERR(ctx);
1106 nfs_file_set_open_context(filp, ctx);
1107 put_nfs_open_context(ctx);
1108 nfs_fscache_open_file(inode, filp);
1111 EXPORT_SYMBOL_GPL(nfs_open);
1114 * This function is called whenever some part of NFS notices that
1115 * the cached attributes have to be refreshed.
1118 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1120 int status = -ESTALE;
1121 struct nfs4_label *label = NULL;
1122 struct nfs_fattr *fattr = NULL;
1123 struct nfs_inode *nfsi = NFS_I(inode);
1125 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1126 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1128 trace_nfs_revalidate_inode_enter(inode);
1130 if (is_bad_inode(inode))
1132 if (NFS_STALE(inode))
1135 /* pNFS: Attributes aren't updated until we layoutcommit */
1136 if (S_ISREG(inode->i_mode)) {
1137 status = pnfs_sync_inode(inode, false);
1143 fattr = nfs_alloc_fattr();
1147 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1149 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1150 if (IS_ERR(label)) {
1151 status = PTR_ERR(label);
1155 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr,
1158 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1160 (unsigned long long)NFS_FILEID(inode), status);
1161 if (status == -ESTALE) {
1162 nfs_zap_caches(inode);
1163 if (!S_ISDIR(inode->i_mode))
1164 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
1169 status = nfs_refresh_inode(inode, fattr);
1171 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1173 (unsigned long long)NFS_FILEID(inode), status);
1177 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1178 nfs_zap_acl_cache(inode);
1180 nfs_setsecurity(inode, fattr, label);
1182 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1184 (unsigned long long)NFS_FILEID(inode));
1187 nfs4_label_free(label);
1189 nfs_free_fattr(fattr);
1190 trace_nfs_revalidate_inode_exit(inode, status);
1194 int nfs_attribute_cache_expired(struct inode *inode)
1196 if (nfs_have_delegated_attributes(inode))
1198 return nfs_attribute_timeout(inode);
1202 * nfs_revalidate_inode - Revalidate the inode attributes
1203 * @server: pointer to nfs_server struct
1204 * @inode: pointer to inode struct
1206 * Updates inode attribute information by retrieving the data from the server.
1208 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1210 if (!nfs_need_revalidate_inode(inode))
1211 return NFS_STALE(inode) ? -ESTALE : 0;
1212 return __nfs_revalidate_inode(server, inode);
1214 EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1216 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
1218 struct nfs_inode *nfsi = NFS_I(inode);
1221 if (mapping->nrpages != 0) {
1222 if (S_ISREG(inode->i_mode)) {
1223 ret = nfs_sync_mapping(mapping);
1227 ret = invalidate_inode_pages2(mapping);
1231 if (S_ISDIR(inode->i_mode)) {
1232 spin_lock(&inode->i_lock);
1233 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
1234 spin_unlock(&inode->i_lock);
1236 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1237 nfs_fscache_wait_on_invalidate(inode);
1239 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1241 (unsigned long long)NFS_FILEID(inode));
1245 bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1247 return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
1251 int nfs_revalidate_mapping_rcu(struct inode *inode)
1253 struct nfs_inode *nfsi = NFS_I(inode);
1254 unsigned long *bitlock = &nfsi->flags;
1257 if (IS_SWAPFILE(inode))
1259 if (nfs_mapping_need_revalidate_inode(inode)) {
1263 spin_lock(&inode->i_lock);
1264 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1265 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1267 spin_unlock(&inode->i_lock);
1273 * nfs_revalidate_mapping - Revalidate the pagecache
1274 * @inode: pointer to host inode
1275 * @mapping: pointer to mapping
1277 int nfs_revalidate_mapping(struct inode *inode,
1278 struct address_space *mapping)
1280 struct nfs_inode *nfsi = NFS_I(inode);
1281 unsigned long *bitlock = &nfsi->flags;
1284 /* swapfiles are not supposed to be shared. */
1285 if (IS_SWAPFILE(inode))
1288 if (nfs_mapping_need_revalidate_inode(inode)) {
1289 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1295 * We must clear NFS_INO_INVALID_DATA first to ensure that
1296 * invalidations that come in while we're shooting down the mappings
1297 * are respected. But, that leaves a race window where one revalidator
1298 * can clear the flag, and then another checks it before the mapping
1299 * gets invalidated. Fix that by serializing access to this part of
1302 * At the same time, we need to allow other tasks to see whether we
1303 * might be in the middle of invalidating the pages, so we only set
1304 * the bit lock here if it looks like we're going to be doing that.
1307 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1308 nfs_wait_bit_killable, TASK_KILLABLE);
1311 spin_lock(&inode->i_lock);
1312 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1313 spin_unlock(&inode->i_lock);
1316 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1318 spin_unlock(&inode->i_lock);
1322 set_bit(NFS_INO_INVALIDATING, bitlock);
1324 nfsi->cache_validity &= ~(NFS_INO_INVALID_DATA|
1325 NFS_INO_DATA_INVAL_DEFER);
1326 spin_unlock(&inode->i_lock);
1327 trace_nfs_invalidate_mapping_enter(inode);
1328 ret = nfs_invalidate_mapping(inode, mapping);
1329 trace_nfs_invalidate_mapping_exit(inode, ret);
1331 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
1332 smp_mb__after_atomic();
1333 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
1338 static bool nfs_file_has_writers(struct nfs_inode *nfsi)
1340 struct inode *inode = &nfsi->vfs_inode;
1342 if (!S_ISREG(inode->i_mode))
1344 if (list_empty(&nfsi->open_files))
1346 return inode_is_open_for_write(inode);
1349 static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
1351 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
1354 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1358 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1359 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1360 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1361 inode_set_iversion_raw(inode, fattr->change_attr);
1362 if (S_ISDIR(inode->i_mode))
1363 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1365 /* If we have atomic WCC data, we may update some attributes */
1366 ts = timespec64_to_timespec(inode->i_ctime);
1367 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1368 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
1369 && timespec_equal(&ts, &fattr->pre_ctime)) {
1370 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
1373 ts = timespec64_to_timespec(inode->i_mtime);
1374 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1375 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
1376 && timespec_equal(&ts, &fattr->pre_mtime)) {
1377 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
1378 if (S_ISDIR(inode->i_mode))
1379 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1381 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1382 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1383 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
1384 && !nfs_have_writebacks(inode)) {
1385 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
1390 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1391 * @inode: pointer to inode
1392 * @fattr: updated attributes
1394 * Verifies the attribute cache. If we have just changed the attributes,
1395 * so that fattr carries weak cache consistency data, then it may
1396 * also update the ctime/mtime/change_attribute.
1398 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1400 struct nfs_inode *nfsi = NFS_I(inode);
1401 loff_t cur_size, new_isize;
1402 unsigned long invalid = 0;
1405 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1408 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1409 /* Only a mounted-on-fileid? Just exit */
1410 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1412 /* Has the inode gone and changed behind our back? */
1413 } else if (nfsi->fileid != fattr->fileid) {
1414 /* Is this perhaps the mounted-on fileid? */
1415 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1416 nfsi->fileid == fattr->mounted_on_fileid)
1420 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1424 if (!nfs_file_has_buffered_writers(nfsi)) {
1425 /* Verify a few of the more important attributes */
1426 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
1427 invalid |= NFS_INO_INVALID_CHANGE
1428 | NFS_INO_REVAL_PAGECACHE;
1430 ts = timespec64_to_timespec(inode->i_mtime);
1431 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&ts, &fattr->mtime))
1432 invalid |= NFS_INO_INVALID_MTIME;
1434 ts = timespec64_to_timespec(inode->i_ctime);
1435 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&ts, &fattr->ctime))
1436 invalid |= NFS_INO_INVALID_CTIME;
1438 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1439 cur_size = i_size_read(inode);
1440 new_isize = nfs_size_to_loff_t(fattr->size);
1441 if (cur_size != new_isize)
1442 invalid |= NFS_INO_INVALID_SIZE
1443 | NFS_INO_REVAL_PAGECACHE;
1447 /* Have any file permissions changed? */
1448 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
1449 invalid |= NFS_INO_INVALID_ACCESS
1450 | NFS_INO_INVALID_ACL
1451 | NFS_INO_INVALID_OTHER;
1452 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
1453 invalid |= NFS_INO_INVALID_ACCESS
1454 | NFS_INO_INVALID_ACL
1455 | NFS_INO_INVALID_OTHER;
1456 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
1457 invalid |= NFS_INO_INVALID_ACCESS
1458 | NFS_INO_INVALID_ACL
1459 | NFS_INO_INVALID_OTHER;
1461 /* Has the link count changed? */
1462 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
1463 invalid |= NFS_INO_INVALID_OTHER;
1465 ts = timespec64_to_timespec(inode->i_atime);
1466 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&ts, &fattr->atime))
1467 invalid |= NFS_INO_INVALID_ATIME;
1470 nfs_set_cache_invalid(inode, invalid);
1472 nfsi->read_cache_jiffies = fattr->time_start;
1476 static atomic_long_t nfs_attr_generation_counter;
1478 static unsigned long nfs_read_attr_generation_counter(void)
1480 return atomic_long_read(&nfs_attr_generation_counter);
1483 unsigned long nfs_inc_attr_generation_counter(void)
1485 return atomic_long_inc_return(&nfs_attr_generation_counter);
1487 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
1489 void nfs_fattr_init(struct nfs_fattr *fattr)
1492 fattr->time_start = jiffies;
1493 fattr->gencount = nfs_inc_attr_generation_counter();
1494 fattr->owner_name = NULL;
1495 fattr->group_name = NULL;
1497 EXPORT_SYMBOL_GPL(nfs_fattr_init);
1500 * nfs_fattr_set_barrier
1501 * @fattr: attributes
1503 * Used to set a barrier after an attribute was updated. This
1504 * barrier ensures that older attributes from RPC calls that may
1505 * have raced with our update cannot clobber these new values.
1506 * Note that you are still responsible for ensuring that other
1507 * operations which change the attribute on the server do not
1510 void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1512 fattr->gencount = nfs_inc_attr_generation_counter();
1515 struct nfs_fattr *nfs_alloc_fattr(void)
1517 struct nfs_fattr *fattr;
1519 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1521 nfs_fattr_init(fattr);
1524 EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
1526 struct nfs_fh *nfs_alloc_fhandle(void)
1530 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1535 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
1539 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1540 * in the same way that wireshark does
1544 * For debugging only.
1546 u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1548 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1549 * not on the result */
1550 return nfs_fhandle_hash(fh);
1552 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
1555 * _nfs_display_fhandle - display an NFS file handle on the console
1557 * @fh: file handle to display
1558 * @caption: display caption
1560 * For debugging only.
1562 void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1566 if (fh == NULL || fh->size == 0) {
1567 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1571 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1572 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
1573 for (i = 0; i < fh->size; i += 16) {
1574 __be32 *pos = (__be32 *)&fh->data[i];
1576 switch ((fh->size - i - 1) >> 2) {
1578 printk(KERN_DEFAULT " %08x\n",
1582 printk(KERN_DEFAULT " %08x %08x\n",
1583 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1586 printk(KERN_DEFAULT " %08x %08x %08x\n",
1587 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1588 be32_to_cpup(pos + 2));
1591 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1592 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1593 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1597 EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
1601 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1602 * @inode: pointer to inode
1603 * @fattr: attributes
1605 * Attempt to divine whether or not an RPC call reply carrying stale
1606 * attributes got scheduled after another call carrying updated ones.
1608 * To do so, the function first assumes that a more recent ctime means
1609 * that the attributes in fattr are newer, however it also attempt to
1610 * catch the case where ctime either didn't change, or went backwards
1611 * (if someone reset the clock on the server) by looking at whether
1612 * or not this RPC call was started after the inode was last updated.
1613 * Note also the check for wraparound of 'attr_gencount'
1615 * The function returns 'true' if it thinks the attributes in 'fattr' are
1616 * more recent than the ones cached in the inode.
1619 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1621 const struct nfs_inode *nfsi = NFS_I(inode);
1623 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1624 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1627 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1631 trace_nfs_refresh_inode_enter(inode);
1633 if (nfs_inode_attrs_need_update(inode, fattr))
1634 ret = nfs_update_inode(inode, fattr);
1636 ret = nfs_check_inode_attributes(inode, fattr);
1638 trace_nfs_refresh_inode_exit(inode, ret);
1643 * nfs_refresh_inode - try to update the inode attribute cache
1644 * @inode: pointer to inode
1645 * @fattr: updated attributes
1647 * Check that an RPC call that returned attributes has not overlapped with
1648 * other recent updates of the inode metadata, then decide whether it is
1649 * safe to do a full update of the inode attributes, or whether just to
1650 * call nfs_check_inode_attributes.
1652 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1656 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1658 spin_lock(&inode->i_lock);
1659 status = nfs_refresh_inode_locked(inode, fattr);
1660 spin_unlock(&inode->i_lock);
1664 EXPORT_SYMBOL_GPL(nfs_refresh_inode);
1666 static int nfs_post_op_update_inode_locked(struct inode *inode,
1667 struct nfs_fattr *fattr, unsigned int invalid)
1669 if (S_ISDIR(inode->i_mode))
1670 invalid |= NFS_INO_INVALID_DATA;
1671 nfs_set_cache_invalid(inode, invalid);
1672 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1674 return nfs_refresh_inode_locked(inode, fattr);
1678 * nfs_post_op_update_inode - try to update the inode attribute cache
1679 * @inode: pointer to inode
1680 * @fattr: updated attributes
1682 * After an operation that has changed the inode metadata, mark the
1683 * attribute cache as being invalid, then try to update it.
1685 * NB: if the server didn't return any post op attributes, this
1686 * function will force the retrieval of attributes before the next
1687 * NFS request. Thus it should be used only for operations that
1688 * are expected to change one or more attributes, to avoid
1689 * unnecessary NFS requests and trips through nfs_update_inode().
1691 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1695 spin_lock(&inode->i_lock);
1696 nfs_fattr_set_barrier(fattr);
1697 status = nfs_post_op_update_inode_locked(inode, fattr,
1698 NFS_INO_INVALID_CHANGE
1699 | NFS_INO_INVALID_CTIME
1700 | NFS_INO_REVAL_FORCED);
1701 spin_unlock(&inode->i_lock);
1705 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
1708 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1709 * @inode: pointer to inode
1710 * @fattr: updated attributes
1712 * After an operation that has changed the inode metadata, mark the
1713 * attribute cache as being invalid, then try to update it. Fake up
1714 * weak cache consistency data, if none exist.
1716 * This function is mainly designed to be used by the ->write_done() functions.
1718 int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
1722 /* Don't do a WCC update if these attributes are already stale */
1723 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1724 !nfs_inode_attrs_need_update(inode, fattr)) {
1725 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1726 | NFS_ATTR_FATTR_PRESIZE
1727 | NFS_ATTR_FATTR_PREMTIME
1728 | NFS_ATTR_FATTR_PRECTIME);
1731 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1732 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1733 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
1734 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1736 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1737 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1738 fattr->pre_ctime = timespec64_to_timespec(inode->i_ctime);
1739 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1741 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1742 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1743 fattr->pre_mtime = timespec64_to_timespec(inode->i_mtime);
1744 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1746 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1747 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1748 fattr->pre_size = i_size_read(inode);
1749 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1752 status = nfs_post_op_update_inode_locked(inode, fattr,
1753 NFS_INO_INVALID_CHANGE
1754 | NFS_INO_INVALID_CTIME
1755 | NFS_INO_INVALID_MTIME
1756 | NFS_INO_INVALID_BLOCKS);
1761 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1762 * @inode: pointer to inode
1763 * @fattr: updated attributes
1765 * After an operation that has changed the inode metadata, mark the
1766 * attribute cache as being invalid, then try to update it. Fake up
1767 * weak cache consistency data, if none exist.
1769 * This function is mainly designed to be used by the ->write_done() functions.
1771 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1775 spin_lock(&inode->i_lock);
1776 nfs_fattr_set_barrier(fattr);
1777 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
1778 spin_unlock(&inode->i_lock);
1781 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
1785 * Many nfs protocol calls return the new file attributes after
1786 * an operation. Here we update the inode to reflect the state
1787 * of the server's inode.
1789 * This is a bit tricky because we have to make sure all dirty pages
1790 * have been sent off to the server before calling invalidate_inode_pages.
1791 * To make sure no other process adds more write requests while we try
1792 * our best to flush them, we make them sleep during the attribute refresh.
1794 * A very similar scenario holds for the dir cache.
1796 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1798 struct nfs_server *server;
1799 struct nfs_inode *nfsi = NFS_I(inode);
1800 loff_t cur_isize, new_isize;
1801 unsigned long invalid = 0;
1802 unsigned long now = jiffies;
1803 unsigned long save_cache_validity;
1804 bool have_writers = nfs_file_has_buffered_writers(nfsi);
1805 bool cache_revalidated = true;
1806 bool attr_changed = false;
1807 bool have_delegation;
1809 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1810 __func__, inode->i_sb->s_id, inode->i_ino,
1811 nfs_display_fhandle_hash(NFS_FH(inode)),
1812 atomic_read(&inode->i_count), fattr->valid);
1814 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1815 /* Only a mounted-on-fileid? Just exit */
1816 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1818 /* Has the inode gone and changed behind our back? */
1819 } else if (nfsi->fileid != fattr->fileid) {
1820 /* Is this perhaps the mounted-on fileid? */
1821 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1822 nfsi->fileid == fattr->mounted_on_fileid)
1824 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1825 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1826 NFS_SERVER(inode)->nfs_client->cl_hostname,
1827 inode->i_sb->s_id, (long long)nfsi->fileid,
1828 (long long)fattr->fileid);
1833 * Make sure the inode's type hasn't changed.
1835 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1837 * Big trouble! The inode has become a different object.
1839 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
1840 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1844 server = NFS_SERVER(inode);
1845 /* Update the fsid? */
1846 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1847 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1848 !IS_AUTOMOUNT(inode))
1849 server->fsid = fattr->fsid;
1851 /* Save the delegation state before clearing cache_validity */
1852 have_delegation = nfs_have_delegated_attributes(inode);
1855 * Update the read time so we don't revalidate too often.
1857 nfsi->read_cache_jiffies = fattr->time_start;
1859 save_cache_validity = nfsi->cache_validity;
1860 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1861 | NFS_INO_INVALID_ATIME
1862 | NFS_INO_REVAL_FORCED
1863 | NFS_INO_REVAL_PAGECACHE
1864 | NFS_INO_INVALID_BLOCKS);
1866 /* Do atomic weak cache consistency updates */
1867 nfs_wcc_update_inode(inode, fattr);
1869 if (pnfs_layoutcommit_outstanding(inode)) {
1870 nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR;
1871 cache_revalidated = false;
1874 /* More cache consistency checks */
1875 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1876 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
1877 /* Could it be a race with writeback? */
1878 if (!(have_writers || have_delegation)) {
1879 invalid |= NFS_INO_INVALID_DATA
1880 | NFS_INO_INVALID_ACCESS
1881 | NFS_INO_INVALID_ACL;
1882 /* Force revalidate of all attributes */
1883 save_cache_validity |= NFS_INO_INVALID_CTIME
1884 | NFS_INO_INVALID_MTIME
1885 | NFS_INO_INVALID_SIZE
1886 | NFS_INO_INVALID_OTHER;
1887 if (S_ISDIR(inode->i_mode))
1888 nfs_force_lookup_revalidate(inode);
1889 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1892 } else if (!have_delegation)
1893 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1894 inode_set_iversion_raw(inode, fattr->change_attr);
1895 attr_changed = true;
1898 nfsi->cache_validity |= save_cache_validity &
1899 (NFS_INO_INVALID_CHANGE
1900 | NFS_INO_REVAL_PAGECACHE
1901 | NFS_INO_REVAL_FORCED);
1902 cache_revalidated = false;
1905 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1906 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
1907 } else if (server->caps & NFS_CAP_MTIME) {
1908 nfsi->cache_validity |= save_cache_validity &
1909 (NFS_INO_INVALID_MTIME
1910 | NFS_INO_REVAL_FORCED);
1911 cache_revalidated = false;
1914 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1915 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
1916 } else if (server->caps & NFS_CAP_CTIME) {
1917 nfsi->cache_validity |= save_cache_validity &
1918 (NFS_INO_INVALID_CTIME
1919 | NFS_INO_REVAL_FORCED);
1920 cache_revalidated = false;
1923 /* Check if our cached file size is stale */
1924 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1925 new_isize = nfs_size_to_loff_t(fattr->size);
1926 cur_isize = i_size_read(inode);
1927 if (new_isize != cur_isize && !have_delegation) {
1928 /* Do we perhaps have any outstanding writes, or has
1929 * the file grown beyond our last write? */
1930 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
1931 i_size_write(inode, new_isize);
1933 invalid |= NFS_INO_INVALID_DATA;
1934 attr_changed = true;
1936 dprintk("NFS: isize change on server for file %s/%ld "
1940 (long long)cur_isize,
1941 (long long)new_isize);
1944 nfsi->cache_validity |= save_cache_validity &
1945 (NFS_INO_INVALID_SIZE
1946 | NFS_INO_REVAL_PAGECACHE
1947 | NFS_INO_REVAL_FORCED);
1948 cache_revalidated = false;
1952 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1953 inode->i_atime = timespec_to_timespec64(fattr->atime);
1954 else if (server->caps & NFS_CAP_ATIME) {
1955 nfsi->cache_validity |= save_cache_validity &
1956 (NFS_INO_INVALID_ATIME
1957 | NFS_INO_REVAL_FORCED);
1958 cache_revalidated = false;
1961 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1962 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1963 umode_t newmode = inode->i_mode & S_IFMT;
1964 newmode |= fattr->mode & S_IALLUGO;
1965 inode->i_mode = newmode;
1966 invalid |= NFS_INO_INVALID_ACCESS
1967 | NFS_INO_INVALID_ACL;
1968 attr_changed = true;
1970 } else if (server->caps & NFS_CAP_MODE) {
1971 nfsi->cache_validity |= save_cache_validity &
1972 (NFS_INO_INVALID_OTHER
1973 | NFS_INO_REVAL_FORCED);
1974 cache_revalidated = false;
1977 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1978 if (!uid_eq(inode->i_uid, fattr->uid)) {
1979 invalid |= NFS_INO_INVALID_ACCESS
1980 | NFS_INO_INVALID_ACL;
1981 inode->i_uid = fattr->uid;
1982 attr_changed = true;
1984 } else if (server->caps & NFS_CAP_OWNER) {
1985 nfsi->cache_validity |= save_cache_validity &
1986 (NFS_INO_INVALID_OTHER
1987 | NFS_INO_REVAL_FORCED);
1988 cache_revalidated = false;
1991 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1992 if (!gid_eq(inode->i_gid, fattr->gid)) {
1993 invalid |= NFS_INO_INVALID_ACCESS
1994 | NFS_INO_INVALID_ACL;
1995 inode->i_gid = fattr->gid;
1996 attr_changed = true;
1998 } else if (server->caps & NFS_CAP_OWNER_GROUP) {
1999 nfsi->cache_validity |= save_cache_validity &
2000 (NFS_INO_INVALID_OTHER
2001 | NFS_INO_REVAL_FORCED);
2002 cache_revalidated = false;
2005 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
2006 if (inode->i_nlink != fattr->nlink) {
2007 if (S_ISDIR(inode->i_mode))
2008 invalid |= NFS_INO_INVALID_DATA;
2009 set_nlink(inode, fattr->nlink);
2010 attr_changed = true;
2012 } else if (server->caps & NFS_CAP_NLINK) {
2013 nfsi->cache_validity |= save_cache_validity &
2014 (NFS_INO_INVALID_OTHER
2015 | NFS_INO_REVAL_FORCED);
2016 cache_revalidated = false;
2019 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
2021 * report the blocks in 512byte units
2023 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
2024 } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
2025 inode->i_blocks = fattr->du.nfs2.blocks;
2027 nfsi->cache_validity |= save_cache_validity &
2028 (NFS_INO_INVALID_BLOCKS
2029 | NFS_INO_REVAL_FORCED);
2030 cache_revalidated = false;
2033 /* Update attrtimeo value if we're out of the unstable period */
2035 invalid &= ~NFS_INO_INVALID_ATTR;
2036 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
2037 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
2038 nfsi->attrtimeo_timestamp = now;
2039 /* Set barrier to be more recent than all outstanding updates */
2040 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
2042 if (cache_revalidated) {
2043 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2044 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2045 nfsi->attrtimeo <<= 1;
2046 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2047 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2049 nfsi->attrtimeo_timestamp = now;
2051 /* Set the barrier to be more recent than this fattr */
2052 if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0)
2053 nfsi->attr_gencount = fattr->gencount;
2056 /* Don't invalidate the data if we were to blame */
2057 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2058 || S_ISLNK(inode->i_mode)))
2059 invalid &= ~NFS_INO_INVALID_DATA;
2060 nfs_set_cache_invalid(inode, invalid);
2065 * No need to worry about unhashing the dentry, as the
2066 * lookup validation will know that the inode is bad.
2067 * (But we fall through to invalidate the caches.)
2069 nfs_invalidate_inode(inode);
2073 struct inode *nfs_alloc_inode(struct super_block *sb)
2075 struct nfs_inode *nfsi;
2076 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
2080 nfsi->cache_validity = 0UL;
2081 #if IS_ENABLED(CONFIG_NFS_V4)
2082 nfsi->nfs4_acl = NULL;
2083 #endif /* CONFIG_NFS_V4 */
2084 return &nfsi->vfs_inode;
2086 EXPORT_SYMBOL_GPL(nfs_alloc_inode);
2088 void nfs_free_inode(struct inode *inode)
2090 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2092 EXPORT_SYMBOL_GPL(nfs_free_inode);
2094 static inline void nfs4_init_once(struct nfs_inode *nfsi)
2096 #if IS_ENABLED(CONFIG_NFS_V4)
2097 INIT_LIST_HEAD(&nfsi->open_states);
2098 nfsi->delegation = NULL;
2099 init_rwsem(&nfsi->rwsem);
2100 nfsi->layout = NULL;
2104 static void init_once(void *foo)
2106 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2108 inode_init_once(&nfsi->vfs_inode);
2109 INIT_LIST_HEAD(&nfsi->open_files);
2110 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2111 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
2112 INIT_LIST_HEAD(&nfsi->commit_info.list);
2113 atomic_long_set(&nfsi->nrequests, 0);
2114 atomic_long_set(&nfsi->commit_info.ncommit, 0);
2115 atomic_set(&nfsi->commit_info.rpcs_out, 0);
2116 init_rwsem(&nfsi->rmdir_sem);
2117 mutex_init(&nfsi->commit_mutex);
2118 nfs4_init_once(nfsi);
2121 static int __init nfs_init_inodecache(void)
2123 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2124 sizeof(struct nfs_inode),
2125 0, (SLAB_RECLAIM_ACCOUNT|
2126 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
2128 if (nfs_inode_cachep == NULL)
2134 static void nfs_destroy_inodecache(void)
2137 * Make sure all delayed rcu free inodes are flushed before we
2141 kmem_cache_destroy(nfs_inode_cachep);
2144 struct workqueue_struct *nfsiod_workqueue;
2145 EXPORT_SYMBOL_GPL(nfsiod_workqueue);
2148 * start up the nfsiod workqueue
2150 static int nfsiod_start(void)
2152 struct workqueue_struct *wq;
2153 dprintk("RPC: creating workqueue nfsiod\n");
2154 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
2157 nfsiod_workqueue = wq;
2162 * Destroy the nfsiod workqueue
2164 static void nfsiod_stop(void)
2166 struct workqueue_struct *wq;
2168 wq = nfsiod_workqueue;
2171 nfsiod_workqueue = NULL;
2172 destroy_workqueue(wq);
2175 unsigned int nfs_net_id;
2176 EXPORT_SYMBOL_GPL(nfs_net_id);
2178 static int nfs_net_init(struct net *net)
2180 nfs_clients_init(net);
2181 return nfs_fs_proc_net_init(net);
2184 static void nfs_net_exit(struct net *net)
2186 nfs_fs_proc_net_exit(net);
2187 nfs_clients_exit(net);
2190 static struct pernet_operations nfs_net_ops = {
2191 .init = nfs_net_init,
2192 .exit = nfs_net_exit,
2194 .size = sizeof(struct nfs_net),
2200 static int __init init_nfs_fs(void)
2204 err = nfs_sysfs_init();
2208 err = register_pernet_subsys(&nfs_net_ops);
2212 err = nfs_fscache_register();
2216 err = nfsiod_start();
2220 err = nfs_fs_proc_init();
2224 err = nfs_init_nfspagecache();
2228 err = nfs_init_inodecache();
2232 err = nfs_init_readpagecache();
2236 err = nfs_init_writepagecache();
2240 err = nfs_init_directcache();
2244 rpc_proc_register(&init_net, &nfs_rpcstat);
2246 err = register_nfs_fs();
2252 rpc_proc_unregister(&init_net, "nfs");
2253 nfs_destroy_directcache();
2255 nfs_destroy_writepagecache();
2257 nfs_destroy_readpagecache();
2259 nfs_destroy_inodecache();
2261 nfs_destroy_nfspagecache();
2267 nfs_fscache_unregister();
2269 unregister_pernet_subsys(&nfs_net_ops);
2276 static void __exit exit_nfs_fs(void)
2278 nfs_destroy_directcache();
2279 nfs_destroy_writepagecache();
2280 nfs_destroy_readpagecache();
2281 nfs_destroy_inodecache();
2282 nfs_destroy_nfspagecache();
2283 nfs_fscache_unregister();
2284 unregister_pernet_subsys(&nfs_net_ops);
2285 rpc_proc_unregister(&init_net, "nfs");
2286 unregister_nfs_fs();
2292 /* Not quite true; I just maintain it */
2293 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2294 MODULE_LICENSE("GPL");
2295 module_param(enable_ino64, bool, 0644);
2297 module_init(init_nfs_fs)
2298 module_exit(exit_nfs_fs)