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 filemap_write_and_wait(inode->i_mapping);
799 * We may force a getattr if the user cares about atime.
801 * Note that we only have to check the vfsmount flags here:
802 * - NFS always sets S_NOATIME by so checking it would give a
804 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
805 * no point in checking those.
807 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
808 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
809 request_mask &= ~STATX_ATIME;
811 /* Is the user requesting attributes that might need revalidation? */
812 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
813 STATX_MTIME|STATX_UID|STATX_GID|
814 STATX_SIZE|STATX_BLOCKS)))
815 goto out_no_revalidate;
817 /* Check whether the cached attributes are stale */
818 do_update |= force_sync || nfs_attribute_cache_expired(inode);
819 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
820 do_update |= cache_validity &
821 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL);
822 if (request_mask & STATX_ATIME)
823 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
824 if (request_mask & (STATX_CTIME|STATX_MTIME))
825 do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE;
826 if (request_mask & STATX_BLOCKS)
827 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
829 /* Update the attribute cache */
830 if (!(server->flags & NFS_MOUNT_NOAC))
831 nfs_readdirplus_parent_cache_miss(path->dentry);
833 nfs_readdirplus_parent_cache_hit(path->dentry);
834 err = __nfs_revalidate_inode(server, inode);
838 nfs_readdirplus_parent_cache_hit(path->dentry);
840 /* Only return attributes that were revalidated. */
841 stat->result_mask &= request_mask;
843 generic_fillattr(inode, stat);
844 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
845 if (S_ISDIR(inode->i_mode))
846 stat->blksize = NFS_SERVER(inode)->dtsize;
848 trace_nfs_getattr_exit(inode, err);
851 EXPORT_SYMBOL_GPL(nfs_getattr);
853 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
855 refcount_set(&l_ctx->count, 1);
856 l_ctx->lockowner = current->files;
857 INIT_LIST_HEAD(&l_ctx->list);
858 atomic_set(&l_ctx->io_count, 0);
861 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
863 struct nfs_lock_context *pos;
865 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
866 if (pos->lockowner != current->files)
868 if (refcount_inc_not_zero(&pos->count))
874 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
876 struct nfs_lock_context *res, *new = NULL;
877 struct inode *inode = d_inode(ctx->dentry);
880 res = __nfs_find_lock_context(ctx);
883 new = kmalloc(sizeof(*new), GFP_KERNEL);
885 return ERR_PTR(-ENOMEM);
886 nfs_init_lock_context(new);
887 spin_lock(&inode->i_lock);
888 res = __nfs_find_lock_context(ctx);
890 new->open_context = get_nfs_open_context(ctx);
891 if (new->open_context) {
892 list_add_tail_rcu(&new->list,
893 &ctx->lock_context.list);
897 res = ERR_PTR(-EBADF);
899 spin_unlock(&inode->i_lock);
904 EXPORT_SYMBOL_GPL(nfs_get_lock_context);
906 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
908 struct nfs_open_context *ctx = l_ctx->open_context;
909 struct inode *inode = d_inode(ctx->dentry);
911 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
913 list_del_rcu(&l_ctx->list);
914 spin_unlock(&inode->i_lock);
915 put_nfs_open_context(ctx);
916 kfree_rcu(l_ctx, rcu_head);
918 EXPORT_SYMBOL_GPL(nfs_put_lock_context);
921 * nfs_close_context - Common close_context() routine NFSv2/v3
922 * @ctx: pointer to context
923 * @is_sync: is this a synchronous close
925 * Ensure that the attributes are up to date if we're mounted
926 * with close-to-open semantics and we have cached data that will
927 * need to be revalidated on open.
929 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
931 struct nfs_inode *nfsi;
933 struct nfs_server *server;
935 if (!(ctx->mode & FMODE_WRITE))
939 inode = d_inode(ctx->dentry);
940 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
943 if (inode->i_mapping->nrpages == 0)
945 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
947 if (!list_empty(&nfsi->open_files))
949 server = NFS_SERVER(inode);
950 if (server->flags & NFS_MOUNT_NOCTO)
952 nfs_revalidate_inode(server, inode);
954 EXPORT_SYMBOL_GPL(nfs_close_context);
956 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
960 struct nfs_open_context *ctx;
962 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
964 return ERR_PTR(-ENOMEM);
965 nfs_sb_active(dentry->d_sb);
966 ctx->dentry = dget(dentry);
968 ctx->cred = get_cred(filp->f_cred);
970 ctx->cred = get_current_cred();
976 ctx->flock_owner = (fl_owner_t)filp;
977 nfs_init_lock_context(&ctx->lock_context);
978 ctx->lock_context.open_context = ctx;
979 INIT_LIST_HEAD(&ctx->list);
980 ctx->mdsthreshold = NULL;
983 EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
985 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
987 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
991 EXPORT_SYMBOL_GPL(get_nfs_open_context);
993 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
995 struct inode *inode = d_inode(ctx->dentry);
996 struct super_block *sb = ctx->dentry->d_sb;
998 if (!refcount_dec_and_test(&ctx->lock_context.count))
1000 if (!list_empty(&ctx->list)) {
1001 spin_lock(&inode->i_lock);
1002 list_del_rcu(&ctx->list);
1003 spin_unlock(&inode->i_lock);
1006 NFS_PROTO(inode)->close_context(ctx, is_sync);
1007 put_cred(ctx->cred);
1009 nfs_sb_deactive(sb);
1010 put_rpccred(ctx->ll_cred);
1011 kfree(ctx->mdsthreshold);
1012 kfree_rcu(ctx, rcu_head);
1015 void put_nfs_open_context(struct nfs_open_context *ctx)
1017 __put_nfs_open_context(ctx, 0);
1019 EXPORT_SYMBOL_GPL(put_nfs_open_context);
1021 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1023 __put_nfs_open_context(ctx, 1);
1027 * Ensure that mmap has a recent RPC credential for use when writing out
1030 void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1032 struct inode *inode = d_inode(ctx->dentry);
1033 struct nfs_inode *nfsi = NFS_I(inode);
1035 spin_lock(&inode->i_lock);
1036 if (list_empty(&nfsi->open_files) &&
1037 (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER))
1038 nfsi->cache_validity |= NFS_INO_INVALID_DATA |
1039 NFS_INO_REVAL_FORCED;
1040 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1041 spin_unlock(&inode->i_lock);
1043 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1045 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1047 filp->private_data = get_nfs_open_context(ctx);
1048 set_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
1049 if (list_empty(&ctx->list))
1050 nfs_inode_attach_open_context(ctx);
1052 EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1055 * Given an inode, search for an open context with the desired characteristics
1057 struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1059 struct nfs_inode *nfsi = NFS_I(inode);
1060 struct nfs_open_context *pos, *ctx = NULL;
1063 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
1064 if (cred != NULL && pos->cred != cred)
1066 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1068 if (!test_bit(NFS_CONTEXT_FILE_OPEN, &pos->flags))
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);
1085 clear_bit(NFS_CONTEXT_FILE_OPEN, &ctx->flags);
1087 * We fatal error on write before. Try to writeback
1091 invalidate_inode_pages2(inode->i_mapping);
1092 filp->private_data = NULL;
1093 put_nfs_open_context_sync(ctx);
1098 * These allocate and release file read/write context information.
1100 int nfs_open(struct inode *inode, struct file *filp)
1102 struct nfs_open_context *ctx;
1104 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
1106 return PTR_ERR(ctx);
1107 nfs_file_set_open_context(filp, ctx);
1108 put_nfs_open_context(ctx);
1109 nfs_fscache_open_file(inode, filp);
1112 EXPORT_SYMBOL_GPL(nfs_open);
1115 * This function is called whenever some part of NFS notices that
1116 * the cached attributes have to be refreshed.
1119 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1121 int status = -ESTALE;
1122 struct nfs4_label *label = NULL;
1123 struct nfs_fattr *fattr = NULL;
1124 struct nfs_inode *nfsi = NFS_I(inode);
1126 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1127 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1129 trace_nfs_revalidate_inode_enter(inode);
1131 if (is_bad_inode(inode))
1133 if (NFS_STALE(inode))
1136 /* pNFS: Attributes aren't updated until we layoutcommit */
1137 if (S_ISREG(inode->i_mode)) {
1138 status = pnfs_sync_inode(inode, false);
1144 fattr = nfs_alloc_fattr();
1148 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1150 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1151 if (IS_ERR(label)) {
1152 status = PTR_ERR(label);
1156 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr,
1159 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1161 (unsigned long long)NFS_FILEID(inode), status);
1162 if (status == -ESTALE) {
1163 nfs_zap_caches(inode);
1164 if (!S_ISDIR(inode->i_mode))
1165 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
1170 status = nfs_refresh_inode(inode, fattr);
1172 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1174 (unsigned long long)NFS_FILEID(inode), status);
1178 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1179 nfs_zap_acl_cache(inode);
1181 nfs_setsecurity(inode, fattr, label);
1183 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1185 (unsigned long long)NFS_FILEID(inode));
1188 nfs4_label_free(label);
1190 nfs_free_fattr(fattr);
1191 trace_nfs_revalidate_inode_exit(inode, status);
1195 int nfs_attribute_cache_expired(struct inode *inode)
1197 if (nfs_have_delegated_attributes(inode))
1199 return nfs_attribute_timeout(inode);
1203 * nfs_revalidate_inode - Revalidate the inode attributes
1204 * @server: pointer to nfs_server struct
1205 * @inode: pointer to inode struct
1207 * Updates inode attribute information by retrieving the data from the server.
1209 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1211 if (!nfs_need_revalidate_inode(inode))
1212 return NFS_STALE(inode) ? -ESTALE : 0;
1213 return __nfs_revalidate_inode(server, inode);
1215 EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1217 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
1219 struct nfs_inode *nfsi = NFS_I(inode);
1222 if (mapping->nrpages != 0) {
1223 if (S_ISREG(inode->i_mode)) {
1224 ret = nfs_sync_mapping(mapping);
1228 ret = invalidate_inode_pages2(mapping);
1232 if (S_ISDIR(inode->i_mode)) {
1233 spin_lock(&inode->i_lock);
1234 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
1235 spin_unlock(&inode->i_lock);
1237 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1238 nfs_fscache_wait_on_invalidate(inode);
1240 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1242 (unsigned long long)NFS_FILEID(inode));
1246 bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1248 return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
1252 int nfs_revalidate_mapping_rcu(struct inode *inode)
1254 struct nfs_inode *nfsi = NFS_I(inode);
1255 unsigned long *bitlock = &nfsi->flags;
1258 if (IS_SWAPFILE(inode))
1260 if (nfs_mapping_need_revalidate_inode(inode)) {
1264 spin_lock(&inode->i_lock);
1265 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1266 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1268 spin_unlock(&inode->i_lock);
1274 * nfs_revalidate_mapping - Revalidate the pagecache
1275 * @inode: pointer to host inode
1276 * @mapping: pointer to mapping
1278 int nfs_revalidate_mapping(struct inode *inode,
1279 struct address_space *mapping)
1281 struct nfs_inode *nfsi = NFS_I(inode);
1282 unsigned long *bitlock = &nfsi->flags;
1285 /* swapfiles are not supposed to be shared. */
1286 if (IS_SWAPFILE(inode))
1289 if (nfs_mapping_need_revalidate_inode(inode)) {
1290 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1296 * We must clear NFS_INO_INVALID_DATA first to ensure that
1297 * invalidations that come in while we're shooting down the mappings
1298 * are respected. But, that leaves a race window where one revalidator
1299 * can clear the flag, and then another checks it before the mapping
1300 * gets invalidated. Fix that by serializing access to this part of
1303 * At the same time, we need to allow other tasks to see whether we
1304 * might be in the middle of invalidating the pages, so we only set
1305 * the bit lock here if it looks like we're going to be doing that.
1308 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1309 nfs_wait_bit_killable, TASK_KILLABLE);
1312 spin_lock(&inode->i_lock);
1313 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1314 spin_unlock(&inode->i_lock);
1317 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1319 spin_unlock(&inode->i_lock);
1323 set_bit(NFS_INO_INVALIDATING, bitlock);
1325 nfsi->cache_validity &= ~(NFS_INO_INVALID_DATA|
1326 NFS_INO_DATA_INVAL_DEFER);
1327 spin_unlock(&inode->i_lock);
1328 trace_nfs_invalidate_mapping_enter(inode);
1329 ret = nfs_invalidate_mapping(inode, mapping);
1330 trace_nfs_invalidate_mapping_exit(inode, ret);
1332 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
1333 smp_mb__after_atomic();
1334 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
1339 static bool nfs_file_has_writers(struct nfs_inode *nfsi)
1341 struct inode *inode = &nfsi->vfs_inode;
1343 if (!S_ISREG(inode->i_mode))
1345 if (list_empty(&nfsi->open_files))
1347 return inode_is_open_for_write(inode);
1350 static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
1352 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
1355 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1359 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1360 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1361 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1362 inode_set_iversion_raw(inode, fattr->change_attr);
1363 if (S_ISDIR(inode->i_mode))
1364 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1366 /* If we have atomic WCC data, we may update some attributes */
1367 ts = timespec64_to_timespec(inode->i_ctime);
1368 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1369 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
1370 && timespec_equal(&ts, &fattr->pre_ctime)) {
1371 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
1374 ts = timespec64_to_timespec(inode->i_mtime);
1375 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1376 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
1377 && timespec_equal(&ts, &fattr->pre_mtime)) {
1378 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
1379 if (S_ISDIR(inode->i_mode))
1380 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1382 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1383 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1384 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
1385 && !nfs_have_writebacks(inode)) {
1386 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
1391 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1392 * @inode: pointer to inode
1393 * @fattr: updated attributes
1395 * Verifies the attribute cache. If we have just changed the attributes,
1396 * so that fattr carries weak cache consistency data, then it may
1397 * also update the ctime/mtime/change_attribute.
1399 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1401 struct nfs_inode *nfsi = NFS_I(inode);
1402 loff_t cur_size, new_isize;
1403 unsigned long invalid = 0;
1406 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1409 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1410 /* Only a mounted-on-fileid? Just exit */
1411 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1413 /* Has the inode gone and changed behind our back? */
1414 } else if (nfsi->fileid != fattr->fileid) {
1415 /* Is this perhaps the mounted-on fileid? */
1416 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1417 nfsi->fileid == fattr->mounted_on_fileid)
1421 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1425 if (!nfs_file_has_buffered_writers(nfsi)) {
1426 /* Verify a few of the more important attributes */
1427 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
1428 invalid |= NFS_INO_INVALID_CHANGE
1429 | NFS_INO_REVAL_PAGECACHE;
1431 ts = timespec64_to_timespec(inode->i_mtime);
1432 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&ts, &fattr->mtime))
1433 invalid |= NFS_INO_INVALID_MTIME;
1435 ts = timespec64_to_timespec(inode->i_ctime);
1436 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&ts, &fattr->ctime))
1437 invalid |= NFS_INO_INVALID_CTIME;
1439 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1440 cur_size = i_size_read(inode);
1441 new_isize = nfs_size_to_loff_t(fattr->size);
1442 if (cur_size != new_isize)
1443 invalid |= NFS_INO_INVALID_SIZE
1444 | NFS_INO_REVAL_PAGECACHE;
1448 /* Have any file permissions changed? */
1449 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
1450 invalid |= NFS_INO_INVALID_ACCESS
1451 | NFS_INO_INVALID_ACL
1452 | NFS_INO_INVALID_OTHER;
1453 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
1454 invalid |= NFS_INO_INVALID_ACCESS
1455 | NFS_INO_INVALID_ACL
1456 | NFS_INO_INVALID_OTHER;
1457 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
1458 invalid |= NFS_INO_INVALID_ACCESS
1459 | NFS_INO_INVALID_ACL
1460 | NFS_INO_INVALID_OTHER;
1462 /* Has the link count changed? */
1463 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
1464 invalid |= NFS_INO_INVALID_OTHER;
1466 ts = timespec64_to_timespec(inode->i_atime);
1467 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&ts, &fattr->atime))
1468 invalid |= NFS_INO_INVALID_ATIME;
1471 nfs_set_cache_invalid(inode, invalid);
1473 nfsi->read_cache_jiffies = fattr->time_start;
1477 static atomic_long_t nfs_attr_generation_counter;
1479 static unsigned long nfs_read_attr_generation_counter(void)
1481 return atomic_long_read(&nfs_attr_generation_counter);
1484 unsigned long nfs_inc_attr_generation_counter(void)
1486 return atomic_long_inc_return(&nfs_attr_generation_counter);
1488 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
1490 void nfs_fattr_init(struct nfs_fattr *fattr)
1493 fattr->time_start = jiffies;
1494 fattr->gencount = nfs_inc_attr_generation_counter();
1495 fattr->owner_name = NULL;
1496 fattr->group_name = NULL;
1498 EXPORT_SYMBOL_GPL(nfs_fattr_init);
1501 * nfs_fattr_set_barrier
1502 * @fattr: attributes
1504 * Used to set a barrier after an attribute was updated. This
1505 * barrier ensures that older attributes from RPC calls that may
1506 * have raced with our update cannot clobber these new values.
1507 * Note that you are still responsible for ensuring that other
1508 * operations which change the attribute on the server do not
1511 void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1513 fattr->gencount = nfs_inc_attr_generation_counter();
1516 struct nfs_fattr *nfs_alloc_fattr(void)
1518 struct nfs_fattr *fattr;
1520 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1522 nfs_fattr_init(fattr);
1525 EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
1527 struct nfs_fh *nfs_alloc_fhandle(void)
1531 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1536 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
1540 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1541 * in the same way that wireshark does
1545 * For debugging only.
1547 u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1549 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1550 * not on the result */
1551 return nfs_fhandle_hash(fh);
1553 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
1556 * _nfs_display_fhandle - display an NFS file handle on the console
1558 * @fh: file handle to display
1559 * @caption: display caption
1561 * For debugging only.
1563 void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1567 if (fh == NULL || fh->size == 0) {
1568 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1572 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1573 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
1574 for (i = 0; i < fh->size; i += 16) {
1575 __be32 *pos = (__be32 *)&fh->data[i];
1577 switch ((fh->size - i - 1) >> 2) {
1579 printk(KERN_DEFAULT " %08x\n",
1583 printk(KERN_DEFAULT " %08x %08x\n",
1584 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1587 printk(KERN_DEFAULT " %08x %08x %08x\n",
1588 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1589 be32_to_cpup(pos + 2));
1592 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1593 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1594 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1598 EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
1602 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1603 * @inode: pointer to inode
1604 * @fattr: attributes
1606 * Attempt to divine whether or not an RPC call reply carrying stale
1607 * attributes got scheduled after another call carrying updated ones.
1609 * To do so, the function first assumes that a more recent ctime means
1610 * that the attributes in fattr are newer, however it also attempt to
1611 * catch the case where ctime either didn't change, or went backwards
1612 * (if someone reset the clock on the server) by looking at whether
1613 * or not this RPC call was started after the inode was last updated.
1614 * Note also the check for wraparound of 'attr_gencount'
1616 * The function returns 'true' if it thinks the attributes in 'fattr' are
1617 * more recent than the ones cached in the inode.
1620 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1622 unsigned long attr_gencount = NFS_I(inode)->attr_gencount;
1624 return (long)(fattr->gencount - attr_gencount) > 0 ||
1625 (long)(attr_gencount - nfs_read_attr_generation_counter()) > 0;
1628 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1632 trace_nfs_refresh_inode_enter(inode);
1634 if (nfs_inode_attrs_need_update(inode, fattr))
1635 ret = nfs_update_inode(inode, fattr);
1637 ret = nfs_check_inode_attributes(inode, fattr);
1639 trace_nfs_refresh_inode_exit(inode, ret);
1644 * nfs_refresh_inode - try to update the inode attribute cache
1645 * @inode: pointer to inode
1646 * @fattr: updated attributes
1648 * Check that an RPC call that returned attributes has not overlapped with
1649 * other recent updates of the inode metadata, then decide whether it is
1650 * safe to do a full update of the inode attributes, or whether just to
1651 * call nfs_check_inode_attributes.
1653 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1657 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1659 spin_lock(&inode->i_lock);
1660 status = nfs_refresh_inode_locked(inode, fattr);
1661 spin_unlock(&inode->i_lock);
1665 EXPORT_SYMBOL_GPL(nfs_refresh_inode);
1667 static int nfs_post_op_update_inode_locked(struct inode *inode,
1668 struct nfs_fattr *fattr, unsigned int invalid)
1670 if (S_ISDIR(inode->i_mode))
1671 invalid |= NFS_INO_INVALID_DATA;
1672 nfs_set_cache_invalid(inode, invalid);
1673 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1675 return nfs_refresh_inode_locked(inode, fattr);
1679 * nfs_post_op_update_inode - try to update the inode attribute cache
1680 * @inode: pointer to inode
1681 * @fattr: updated attributes
1683 * After an operation that has changed the inode metadata, mark the
1684 * attribute cache as being invalid, then try to update it.
1686 * NB: if the server didn't return any post op attributes, this
1687 * function will force the retrieval of attributes before the next
1688 * NFS request. Thus it should be used only for operations that
1689 * are expected to change one or more attributes, to avoid
1690 * unnecessary NFS requests and trips through nfs_update_inode().
1692 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1696 spin_lock(&inode->i_lock);
1697 nfs_fattr_set_barrier(fattr);
1698 status = nfs_post_op_update_inode_locked(inode, fattr,
1699 NFS_INO_INVALID_CHANGE
1700 | NFS_INO_INVALID_CTIME
1701 | NFS_INO_REVAL_FORCED);
1702 spin_unlock(&inode->i_lock);
1706 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
1709 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1710 * @inode: pointer to inode
1711 * @fattr: updated attributes
1713 * After an operation that has changed the inode metadata, mark the
1714 * attribute cache as being invalid, then try to update it. Fake up
1715 * weak cache consistency data, if none exist.
1717 * This function is mainly designed to be used by the ->write_done() functions.
1719 int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
1723 /* Don't do a WCC update if these attributes are already stale */
1724 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1725 !nfs_inode_attrs_need_update(inode, fattr)) {
1726 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1727 | NFS_ATTR_FATTR_PRESIZE
1728 | NFS_ATTR_FATTR_PREMTIME
1729 | NFS_ATTR_FATTR_PRECTIME);
1732 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1733 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1734 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
1735 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1737 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1738 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1739 fattr->pre_ctime = timespec64_to_timespec(inode->i_ctime);
1740 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1742 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1743 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1744 fattr->pre_mtime = timespec64_to_timespec(inode->i_mtime);
1745 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1747 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1748 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1749 fattr->pre_size = i_size_read(inode);
1750 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1753 status = nfs_post_op_update_inode_locked(inode, fattr,
1754 NFS_INO_INVALID_CHANGE
1755 | NFS_INO_INVALID_CTIME
1756 | NFS_INO_INVALID_MTIME
1757 | NFS_INO_INVALID_BLOCKS);
1762 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1763 * @inode: pointer to inode
1764 * @fattr: updated attributes
1766 * After an operation that has changed the inode metadata, mark the
1767 * attribute cache as being invalid, then try to update it. Fake up
1768 * weak cache consistency data, if none exist.
1770 * This function is mainly designed to be used by the ->write_done() functions.
1772 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1776 spin_lock(&inode->i_lock);
1777 nfs_fattr_set_barrier(fattr);
1778 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
1779 spin_unlock(&inode->i_lock);
1782 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
1786 * Many nfs protocol calls return the new file attributes after
1787 * an operation. Here we update the inode to reflect the state
1788 * of the server's inode.
1790 * This is a bit tricky because we have to make sure all dirty pages
1791 * have been sent off to the server before calling invalidate_inode_pages.
1792 * To make sure no other process adds more write requests while we try
1793 * our best to flush them, we make them sleep during the attribute refresh.
1795 * A very similar scenario holds for the dir cache.
1797 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1799 struct nfs_server *server;
1800 struct nfs_inode *nfsi = NFS_I(inode);
1801 loff_t cur_isize, new_isize;
1802 unsigned long invalid = 0;
1803 unsigned long now = jiffies;
1804 unsigned long save_cache_validity;
1805 bool have_writers = nfs_file_has_buffered_writers(nfsi);
1806 bool cache_revalidated = true;
1807 bool attr_changed = false;
1808 bool have_delegation;
1810 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1811 __func__, inode->i_sb->s_id, inode->i_ino,
1812 nfs_display_fhandle_hash(NFS_FH(inode)),
1813 atomic_read(&inode->i_count), fattr->valid);
1815 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1816 /* Only a mounted-on-fileid? Just exit */
1817 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1819 /* Has the inode gone and changed behind our back? */
1820 } else if (nfsi->fileid != fattr->fileid) {
1821 /* Is this perhaps the mounted-on fileid? */
1822 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1823 nfsi->fileid == fattr->mounted_on_fileid)
1825 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1826 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1827 NFS_SERVER(inode)->nfs_client->cl_hostname,
1828 inode->i_sb->s_id, (long long)nfsi->fileid,
1829 (long long)fattr->fileid);
1834 * Make sure the inode's type hasn't changed.
1836 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1838 * Big trouble! The inode has become a different object.
1840 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
1841 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1845 server = NFS_SERVER(inode);
1846 /* Update the fsid? */
1847 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1848 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1849 !IS_AUTOMOUNT(inode))
1850 server->fsid = fattr->fsid;
1852 /* Save the delegation state before clearing cache_validity */
1853 have_delegation = nfs_have_delegated_attributes(inode);
1856 * Update the read time so we don't revalidate too often.
1858 nfsi->read_cache_jiffies = fattr->time_start;
1860 save_cache_validity = nfsi->cache_validity;
1861 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1862 | NFS_INO_INVALID_ATIME
1863 | NFS_INO_REVAL_FORCED
1864 | NFS_INO_REVAL_PAGECACHE
1865 | NFS_INO_INVALID_BLOCKS);
1867 /* Do atomic weak cache consistency updates */
1868 nfs_wcc_update_inode(inode, fattr);
1870 if (pnfs_layoutcommit_outstanding(inode)) {
1871 nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR;
1872 cache_revalidated = false;
1875 /* More cache consistency checks */
1876 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1877 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
1878 /* Could it be a race with writeback? */
1879 if (!(have_writers || have_delegation)) {
1880 invalid |= NFS_INO_INVALID_DATA
1881 | NFS_INO_INVALID_ACCESS
1882 | NFS_INO_INVALID_ACL;
1883 /* Force revalidate of all attributes */
1884 save_cache_validity |= NFS_INO_INVALID_CTIME
1885 | NFS_INO_INVALID_MTIME
1886 | NFS_INO_INVALID_SIZE
1887 | NFS_INO_INVALID_OTHER;
1888 if (S_ISDIR(inode->i_mode))
1889 nfs_force_lookup_revalidate(inode);
1890 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1893 } else if (!have_delegation)
1894 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1895 inode_set_iversion_raw(inode, fattr->change_attr);
1896 attr_changed = true;
1899 nfsi->cache_validity |= save_cache_validity &
1900 (NFS_INO_INVALID_CHANGE
1901 | NFS_INO_REVAL_PAGECACHE
1902 | NFS_INO_REVAL_FORCED);
1903 cache_revalidated = false;
1906 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1907 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
1908 } else if (server->caps & NFS_CAP_MTIME) {
1909 nfsi->cache_validity |= save_cache_validity &
1910 (NFS_INO_INVALID_MTIME
1911 | NFS_INO_REVAL_FORCED);
1912 cache_revalidated = false;
1915 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1916 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
1917 } else if (server->caps & NFS_CAP_CTIME) {
1918 nfsi->cache_validity |= save_cache_validity &
1919 (NFS_INO_INVALID_CTIME
1920 | NFS_INO_REVAL_FORCED);
1921 cache_revalidated = false;
1924 /* Check if our cached file size is stale */
1925 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1926 new_isize = nfs_size_to_loff_t(fattr->size);
1927 cur_isize = i_size_read(inode);
1928 if (new_isize != cur_isize && !have_delegation) {
1929 /* Do we perhaps have any outstanding writes, or has
1930 * the file grown beyond our last write? */
1931 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
1932 i_size_write(inode, new_isize);
1934 invalid |= NFS_INO_INVALID_DATA;
1935 attr_changed = true;
1937 dprintk("NFS: isize change on server for file %s/%ld "
1941 (long long)cur_isize,
1942 (long long)new_isize);
1945 nfsi->cache_validity |= save_cache_validity &
1946 (NFS_INO_INVALID_SIZE
1947 | NFS_INO_REVAL_PAGECACHE
1948 | NFS_INO_REVAL_FORCED);
1949 cache_revalidated = false;
1953 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1954 inode->i_atime = timespec_to_timespec64(fattr->atime);
1955 else if (server->caps & NFS_CAP_ATIME) {
1956 nfsi->cache_validity |= save_cache_validity &
1957 (NFS_INO_INVALID_ATIME
1958 | NFS_INO_REVAL_FORCED);
1959 cache_revalidated = false;
1962 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1963 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1964 umode_t newmode = inode->i_mode & S_IFMT;
1965 newmode |= fattr->mode & S_IALLUGO;
1966 inode->i_mode = newmode;
1967 invalid |= NFS_INO_INVALID_ACCESS
1968 | NFS_INO_INVALID_ACL;
1969 attr_changed = true;
1971 } else if (server->caps & NFS_CAP_MODE) {
1972 nfsi->cache_validity |= save_cache_validity &
1973 (NFS_INO_INVALID_OTHER
1974 | NFS_INO_REVAL_FORCED);
1975 cache_revalidated = false;
1978 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1979 if (!uid_eq(inode->i_uid, fattr->uid)) {
1980 invalid |= NFS_INO_INVALID_ACCESS
1981 | NFS_INO_INVALID_ACL;
1982 inode->i_uid = fattr->uid;
1983 attr_changed = true;
1985 } else if (server->caps & NFS_CAP_OWNER) {
1986 nfsi->cache_validity |= save_cache_validity &
1987 (NFS_INO_INVALID_OTHER
1988 | NFS_INO_REVAL_FORCED);
1989 cache_revalidated = false;
1992 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1993 if (!gid_eq(inode->i_gid, fattr->gid)) {
1994 invalid |= NFS_INO_INVALID_ACCESS
1995 | NFS_INO_INVALID_ACL;
1996 inode->i_gid = fattr->gid;
1997 attr_changed = true;
1999 } else if (server->caps & NFS_CAP_OWNER_GROUP) {
2000 nfsi->cache_validity |= save_cache_validity &
2001 (NFS_INO_INVALID_OTHER
2002 | NFS_INO_REVAL_FORCED);
2003 cache_revalidated = false;
2006 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
2007 if (inode->i_nlink != fattr->nlink) {
2008 if (S_ISDIR(inode->i_mode))
2009 invalid |= NFS_INO_INVALID_DATA;
2010 set_nlink(inode, fattr->nlink);
2011 attr_changed = true;
2013 } else if (server->caps & NFS_CAP_NLINK) {
2014 nfsi->cache_validity |= save_cache_validity &
2015 (NFS_INO_INVALID_OTHER
2016 | NFS_INO_REVAL_FORCED);
2017 cache_revalidated = false;
2020 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
2022 * report the blocks in 512byte units
2024 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
2025 } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
2026 inode->i_blocks = fattr->du.nfs2.blocks;
2028 nfsi->cache_validity |= save_cache_validity &
2029 (NFS_INO_INVALID_BLOCKS
2030 | NFS_INO_REVAL_FORCED);
2031 cache_revalidated = false;
2034 /* Update attrtimeo value if we're out of the unstable period */
2036 invalid &= ~NFS_INO_INVALID_ATTR;
2037 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
2038 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
2039 nfsi->attrtimeo_timestamp = now;
2040 /* Set barrier to be more recent than all outstanding updates */
2041 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
2043 if (cache_revalidated) {
2044 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2045 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2046 nfsi->attrtimeo <<= 1;
2047 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2048 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2050 nfsi->attrtimeo_timestamp = now;
2052 /* Set the barrier to be more recent than this fattr */
2053 if ((long)(fattr->gencount - nfsi->attr_gencount) > 0)
2054 nfsi->attr_gencount = fattr->gencount;
2057 /* Don't invalidate the data if we were to blame */
2058 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2059 || S_ISLNK(inode->i_mode)))
2060 invalid &= ~NFS_INO_INVALID_DATA;
2061 nfs_set_cache_invalid(inode, invalid);
2066 * No need to worry about unhashing the dentry, as the
2067 * lookup validation will know that the inode is bad.
2068 * (But we fall through to invalidate the caches.)
2070 nfs_invalidate_inode(inode);
2074 struct inode *nfs_alloc_inode(struct super_block *sb)
2076 struct nfs_inode *nfsi;
2077 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
2081 nfsi->cache_validity = 0UL;
2082 #if IS_ENABLED(CONFIG_NFS_V4)
2083 nfsi->nfs4_acl = NULL;
2084 #endif /* CONFIG_NFS_V4 */
2085 return &nfsi->vfs_inode;
2087 EXPORT_SYMBOL_GPL(nfs_alloc_inode);
2089 void nfs_free_inode(struct inode *inode)
2091 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2093 EXPORT_SYMBOL_GPL(nfs_free_inode);
2095 static inline void nfs4_init_once(struct nfs_inode *nfsi)
2097 #if IS_ENABLED(CONFIG_NFS_V4)
2098 INIT_LIST_HEAD(&nfsi->open_states);
2099 nfsi->delegation = NULL;
2100 init_rwsem(&nfsi->rwsem);
2101 nfsi->layout = NULL;
2105 static void init_once(void *foo)
2107 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2109 inode_init_once(&nfsi->vfs_inode);
2110 INIT_LIST_HEAD(&nfsi->open_files);
2111 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2112 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
2113 INIT_LIST_HEAD(&nfsi->commit_info.list);
2114 atomic_long_set(&nfsi->nrequests, 0);
2115 atomic_long_set(&nfsi->commit_info.ncommit, 0);
2116 atomic_set(&nfsi->commit_info.rpcs_out, 0);
2117 init_rwsem(&nfsi->rmdir_sem);
2118 mutex_init(&nfsi->commit_mutex);
2119 nfs4_init_once(nfsi);
2122 static int __init nfs_init_inodecache(void)
2124 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2125 sizeof(struct nfs_inode),
2126 0, (SLAB_RECLAIM_ACCOUNT|
2127 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
2129 if (nfs_inode_cachep == NULL)
2135 static void nfs_destroy_inodecache(void)
2138 * Make sure all delayed rcu free inodes are flushed before we
2142 kmem_cache_destroy(nfs_inode_cachep);
2145 struct workqueue_struct *nfsiod_workqueue;
2146 EXPORT_SYMBOL_GPL(nfsiod_workqueue);
2149 * start up the nfsiod workqueue
2151 static int nfsiod_start(void)
2153 struct workqueue_struct *wq;
2154 dprintk("RPC: creating workqueue nfsiod\n");
2155 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
2158 nfsiod_workqueue = wq;
2163 * Destroy the nfsiod workqueue
2165 static void nfsiod_stop(void)
2167 struct workqueue_struct *wq;
2169 wq = nfsiod_workqueue;
2172 nfsiod_workqueue = NULL;
2173 destroy_workqueue(wq);
2176 unsigned int nfs_net_id;
2177 EXPORT_SYMBOL_GPL(nfs_net_id);
2179 static int nfs_net_init(struct net *net)
2181 nfs_clients_init(net);
2182 return nfs_fs_proc_net_init(net);
2185 static void nfs_net_exit(struct net *net)
2187 nfs_fs_proc_net_exit(net);
2188 nfs_clients_exit(net);
2191 static struct pernet_operations nfs_net_ops = {
2192 .init = nfs_net_init,
2193 .exit = nfs_net_exit,
2195 .size = sizeof(struct nfs_net),
2201 static int __init init_nfs_fs(void)
2205 err = nfs_sysfs_init();
2209 err = register_pernet_subsys(&nfs_net_ops);
2213 err = nfs_fscache_register();
2217 err = nfsiod_start();
2221 err = nfs_fs_proc_init();
2225 err = nfs_init_nfspagecache();
2229 err = nfs_init_inodecache();
2233 err = nfs_init_readpagecache();
2237 err = nfs_init_writepagecache();
2241 err = nfs_init_directcache();
2245 rpc_proc_register(&init_net, &nfs_rpcstat);
2247 err = register_nfs_fs();
2253 rpc_proc_unregister(&init_net, "nfs");
2254 nfs_destroy_directcache();
2256 nfs_destroy_writepagecache();
2258 nfs_destroy_readpagecache();
2260 nfs_destroy_inodecache();
2262 nfs_destroy_nfspagecache();
2268 nfs_fscache_unregister();
2270 unregister_pernet_subsys(&nfs_net_ops);
2277 static void __exit exit_nfs_fs(void)
2279 nfs_destroy_directcache();
2280 nfs_destroy_writepagecache();
2281 nfs_destroy_readpagecache();
2282 nfs_destroy_inodecache();
2283 nfs_destroy_nfspagecache();
2284 nfs_fscache_unregister();
2285 unregister_pernet_subsys(&nfs_net_ops);
2286 rpc_proc_unregister(&init_net, "nfs");
2287 unregister_nfs_fs();
2293 /* Not quite true; I just maintain it */
2294 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2295 MODULE_LICENSE("GPL");
2296 module_param(enable_ino64, bool, 0644);
2298 module_init(init_nfs_fs)
2299 module_exit(exit_nfs_fs)