1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (C) 1992 Rick Sladkey
7 * nfs inode and superblock handling functions
10 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
12 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
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 int nfs_update_inode(struct inode *, struct nfs_fattr *);
67 static struct kmem_cache * nfs_inode_cachep;
69 static inline unsigned long
70 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
72 return nfs_fileid_to_ino_t(fattr->fileid);
75 static int nfs_wait_killable(int mode)
77 freezable_schedule_unsafe();
78 if (signal_pending_state(mode, current))
83 int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
85 return nfs_wait_killable(mode);
87 EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
90 * nfs_compat_user_ino64 - returns the user-visible inode number
91 * @fileid: 64-bit fileid
93 * This function returns a 32-bit inode number if the boot parameter
94 * nfs.enable_ino64 is zero.
96 u64 nfs_compat_user_ino64(u64 fileid)
107 if (sizeof(ino) < sizeof(fileid))
108 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
112 int nfs_drop_inode(struct inode *inode)
114 return NFS_STALE(inode) || generic_drop_inode(inode);
116 EXPORT_SYMBOL_GPL(nfs_drop_inode);
118 void nfs_clear_inode(struct inode *inode)
121 * The following should never happen...
123 WARN_ON_ONCE(nfs_have_writebacks(inode));
124 WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
125 nfs_zap_acl_cache(inode);
126 nfs_access_zap_cache(inode);
127 nfs_fscache_clear_inode(inode);
129 EXPORT_SYMBOL_GPL(nfs_clear_inode);
131 void nfs_evict_inode(struct inode *inode)
133 truncate_inode_pages_final(&inode->i_data);
135 nfs_clear_inode(inode);
138 int nfs_sync_inode(struct inode *inode)
140 inode_dio_wait(inode);
141 return nfs_wb_all(inode);
143 EXPORT_SYMBOL_GPL(nfs_sync_inode);
146 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
147 * @mapping: pointer to struct address_space
149 int nfs_sync_mapping(struct address_space *mapping)
153 if (mapping->nrpages != 0) {
154 unmap_mapping_range(mapping, 0, 0, 0);
155 ret = nfs_wb_all(mapping->host);
160 static int nfs_attribute_timeout(struct inode *inode)
162 struct nfs_inode *nfsi = NFS_I(inode);
164 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
167 static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags)
169 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
171 /* Special case for the pagecache or access cache */
172 if (flags == NFS_INO_REVAL_PAGECACHE &&
173 !(cache_validity & NFS_INO_REVAL_FORCED))
175 return (cache_validity & flags) != 0;
178 static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags)
180 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
182 if ((cache_validity & flags) != 0)
184 if (nfs_attribute_timeout(inode))
189 bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
191 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
192 return nfs_check_cache_invalid_delegated(inode, flags);
194 return nfs_check_cache_invalid_not_delegated(inode, flags);
196 EXPORT_SYMBOL_GPL(nfs_check_cache_invalid);
198 #ifdef CONFIG_NFS_V4_2
199 static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
201 return nfsi->xattr_cache != NULL;
204 static bool nfs_has_xattr_cache(const struct nfs_inode *nfsi)
210 void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
212 struct nfs_inode *nfsi = NFS_I(inode);
213 bool have_delegation = NFS_PROTO(inode)->have_delegation(inode, FMODE_READ);
215 if (have_delegation) {
216 if (!(flags & NFS_INO_REVAL_FORCED))
217 flags &= ~NFS_INO_INVALID_OTHER;
218 flags &= ~(NFS_INO_INVALID_CHANGE
219 | NFS_INO_INVALID_SIZE
220 | NFS_INO_REVAL_PAGECACHE
221 | NFS_INO_INVALID_XATTR);
224 if (!nfs_has_xattr_cache(nfsi))
225 flags &= ~NFS_INO_INVALID_XATTR;
226 if (inode->i_mapping->nrpages == 0)
227 flags &= ~(NFS_INO_INVALID_DATA|NFS_INO_DATA_INVAL_DEFER);
228 nfsi->cache_validity |= flags;
229 if (flags & NFS_INO_INVALID_DATA)
230 nfs_fscache_invalidate(inode);
232 EXPORT_SYMBOL_GPL(nfs_set_cache_invalid);
235 * Invalidate the local caches
237 static void nfs_zap_caches_locked(struct inode *inode)
239 struct nfs_inode *nfsi = NFS_I(inode);
240 int mode = inode->i_mode;
242 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
244 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
245 nfsi->attrtimeo_timestamp = jiffies;
247 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
248 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
249 | NFS_INO_INVALID_DATA
250 | NFS_INO_INVALID_ACCESS
251 | NFS_INO_INVALID_ACL
252 | NFS_INO_INVALID_XATTR
253 | NFS_INO_REVAL_PAGECACHE);
255 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
256 | NFS_INO_INVALID_ACCESS
257 | NFS_INO_INVALID_ACL
258 | NFS_INO_INVALID_XATTR
259 | NFS_INO_REVAL_PAGECACHE);
260 nfs_zap_label_cache_locked(nfsi);
263 void nfs_zap_caches(struct inode *inode)
265 spin_lock(&inode->i_lock);
266 nfs_zap_caches_locked(inode);
267 spin_unlock(&inode->i_lock);
270 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
272 if (mapping->nrpages != 0) {
273 spin_lock(&inode->i_lock);
274 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
275 spin_unlock(&inode->i_lock);
279 void nfs_zap_acl_cache(struct inode *inode)
281 void (*clear_acl_cache)(struct inode *);
283 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
284 if (clear_acl_cache != NULL)
285 clear_acl_cache(inode);
286 spin_lock(&inode->i_lock);
287 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
288 spin_unlock(&inode->i_lock);
290 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
292 void nfs_invalidate_atime(struct inode *inode)
294 spin_lock(&inode->i_lock);
295 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
296 spin_unlock(&inode->i_lock);
298 EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
301 * Invalidate, but do not unhash, the inode.
302 * NB: must be called with inode->i_lock held!
304 static void nfs_set_inode_stale_locked(struct inode *inode)
306 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
307 nfs_zap_caches_locked(inode);
308 trace_nfs_set_inode_stale(inode);
311 void nfs_set_inode_stale(struct inode *inode)
313 spin_lock(&inode->i_lock);
314 nfs_set_inode_stale_locked(inode);
315 spin_unlock(&inode->i_lock);
318 struct nfs_find_desc {
320 struct nfs_fattr *fattr;
324 * In NFSv3 we can have 64bit inode numbers. In order to support
325 * this, and re-exported directories (also seen in NFSv2)
326 * we are forced to allow 2 different inodes to have the same
330 nfs_find_actor(struct inode *inode, void *opaque)
332 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
333 struct nfs_fh *fh = desc->fh;
334 struct nfs_fattr *fattr = desc->fattr;
336 if (NFS_FILEID(inode) != fattr->fileid)
338 if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode))
340 if (nfs_compare_fh(NFS_FH(inode), fh))
342 if (is_bad_inode(inode) || NFS_STALE(inode))
348 nfs_init_locked(struct inode *inode, void *opaque)
350 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
351 struct nfs_fattr *fattr = desc->fattr;
353 set_nfs_fileid(inode, fattr->fileid);
354 inode->i_mode = fattr->mode;
355 nfs_copy_fh(NFS_FH(inode), desc->fh);
359 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
360 static void nfs_clear_label_invalid(struct inode *inode)
362 spin_lock(&inode->i_lock);
363 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
364 spin_unlock(&inode->i_lock);
367 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
368 struct nfs4_label *label)
375 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
376 error = security_inode_notifysecctx(inode, label->label,
379 printk(KERN_ERR "%s() %s %d "
380 "security_inode_notifysecctx() %d\n",
382 (char *)label->label,
384 nfs_clear_label_invalid(inode);
388 struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
390 struct nfs4_label *label = NULL;
391 int minor_version = server->nfs_client->cl_minorversion;
393 if (minor_version < 2)
396 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
399 label = kzalloc(sizeof(struct nfs4_label), flags);
401 return ERR_PTR(-ENOMEM);
403 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
404 if (label->label == NULL) {
406 return ERR_PTR(-ENOMEM);
408 label->len = NFS4_MAXLABELLEN;
412 EXPORT_SYMBOL_GPL(nfs4_label_alloc);
414 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
415 struct nfs4_label *label)
419 EXPORT_SYMBOL_GPL(nfs_setsecurity);
421 /* Search for inode identified by fh, fileid and i_mode in inode cache. */
423 nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
425 struct nfs_find_desc desc = {
432 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
433 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
436 hash = nfs_fattr_to_ino_t(fattr);
437 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
439 dprintk("%s: returning %p\n", __func__, inode);
444 * This is our front-end to iget that looks up inodes by file handle
445 * instead of inode number.
448 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
450 struct nfs_find_desc desc = {
454 struct inode *inode = ERR_PTR(-ENOENT);
457 nfs_attr_check_mountpoint(sb, fattr);
459 if (nfs_attr_use_mounted_on_fileid(fattr))
460 fattr->fileid = fattr->mounted_on_fileid;
461 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
463 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
466 hash = nfs_fattr_to_ino_t(fattr);
468 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
470 inode = ERR_PTR(-ENOMEM);
474 if (inode->i_state & I_NEW) {
475 struct nfs_inode *nfsi = NFS_I(inode);
476 unsigned long now = jiffies;
478 /* We set i_ino for the few things that still rely on it,
482 /* We can't support update_atime(), since the server will reset it */
483 inode->i_flags |= S_NOATIME|S_NOCMTIME;
484 inode->i_mode = fattr->mode;
485 nfsi->cache_validity = 0;
486 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
487 && nfs_server_capable(inode, NFS_CAP_MODE))
488 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
489 /* Why so? Because we want revalidate for devices/FIFOs, and
490 * that's precisely what we have in nfs_file_inode_operations.
492 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
493 if (S_ISREG(inode->i_mode)) {
494 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
495 inode->i_data.a_ops = &nfs_file_aops;
496 } else if (S_ISDIR(inode->i_mode)) {
497 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
498 inode->i_fop = &nfs_dir_operations;
499 inode->i_data.a_ops = &nfs_dir_aops;
500 /* Deal with crossing mountpoints */
501 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
502 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
503 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
504 inode->i_op = &nfs_referral_inode_operations;
506 inode->i_op = &nfs_mountpoint_inode_operations;
508 inode->i_flags |= S_AUTOMOUNT;
510 } else if (S_ISLNK(inode->i_mode)) {
511 inode->i_op = &nfs_symlink_inode_operations;
512 inode_nohighmem(inode);
514 init_special_inode(inode, inode->i_mode, fattr->rdev);
516 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
517 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
518 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
519 inode_set_iversion_raw(inode, 0);
522 inode->i_uid = make_kuid(&init_user_ns, -2);
523 inode->i_gid = make_kgid(&init_user_ns, -2);
525 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
529 nfsi->read_cache_jiffies = fattr->time_start;
530 nfsi->attr_gencount = fattr->gencount;
531 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
532 inode->i_atime = fattr->atime;
533 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
534 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
535 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
536 inode->i_mtime = fattr->mtime;
537 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
538 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
539 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
540 inode->i_ctime = fattr->ctime;
541 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
542 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
543 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
544 inode_set_iversion_raw(inode, fattr->change_attr);
546 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
547 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
548 inode->i_size = nfs_size_to_loff_t(fattr->size);
550 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
551 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
552 set_nlink(inode, fattr->nlink);
553 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
554 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
555 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
556 inode->i_uid = fattr->uid;
557 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
558 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
559 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
560 inode->i_gid = fattr->gid;
561 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
562 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
563 if (nfs_server_capable(inode, NFS_CAP_XATTR))
564 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
565 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
566 inode->i_blocks = fattr->du.nfs2.blocks;
567 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
569 * report the blocks in 512byte units
571 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
574 if (nfsi->cache_validity != 0)
575 nfsi->cache_validity |= NFS_INO_REVAL_FORCED;
577 nfs_setsecurity(inode, fattr, label);
579 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
580 nfsi->attrtimeo_timestamp = now;
581 nfsi->access_cache = RB_ROOT;
583 nfs_fscache_init_inode(inode);
585 unlock_new_inode(inode);
587 int err = nfs_refresh_inode(inode, fattr);
590 inode = ERR_PTR(err);
594 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
596 (unsigned long long)NFS_FILEID(inode),
597 nfs_display_fhandle_hash(fh),
598 atomic_read(&inode->i_count));
604 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
607 EXPORT_SYMBOL_GPL(nfs_fhget);
609 #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)
612 nfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
615 struct inode *inode = d_inode(dentry);
616 struct nfs_fattr *fattr;
619 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
621 /* skip mode change if it's just for clearing setuid/setgid */
622 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
623 attr->ia_valid &= ~ATTR_MODE;
625 if (attr->ia_valid & ATTR_SIZE) {
626 BUG_ON(!S_ISREG(inode->i_mode));
628 error = inode_newsize_ok(inode, attr->ia_size);
632 if (attr->ia_size == i_size_read(inode))
633 attr->ia_valid &= ~ATTR_SIZE;
636 /* Optimization: if the end result is no change, don't RPC */
637 attr->ia_valid &= NFS_VALID_ATTRS;
638 if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
641 trace_nfs_setattr_enter(inode);
643 /* Write all dirty data */
644 if (S_ISREG(inode->i_mode))
645 nfs_sync_inode(inode);
647 fattr = nfs_alloc_fattr();
653 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
655 error = nfs_refresh_inode(inode, fattr);
656 nfs_free_fattr(fattr);
658 trace_nfs_setattr_exit(inode, error);
661 EXPORT_SYMBOL_GPL(nfs_setattr);
664 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
665 * @inode: inode of the file used
666 * @offset: file offset to start truncating
668 * This is a copy of the common vmtruncate, but with the locking
669 * corrected to take into account the fact that NFS requires
670 * inode->i_size to be updated under the inode->i_lock.
671 * Note: must be called with inode->i_lock held!
673 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
677 err = inode_newsize_ok(inode, offset);
681 i_size_write(inode, offset);
684 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA |
685 NFS_INO_DATA_INVAL_DEFER);
686 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
688 spin_unlock(&inode->i_lock);
689 truncate_pagecache(inode, offset);
690 spin_lock(&inode->i_lock);
696 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
697 * @inode: pointer to struct inode
698 * @attr: pointer to struct iattr
699 * @fattr: pointer to struct nfs_fattr
701 * Note: we do this in the *proc.c in order to ensure that
702 * it works for things like exclusive creates too.
704 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
705 struct nfs_fattr *fattr)
707 /* Barrier: bump the attribute generation count. */
708 nfs_fattr_set_barrier(fattr);
710 spin_lock(&inode->i_lock);
711 NFS_I(inode)->attr_gencount = fattr->gencount;
712 if ((attr->ia_valid & ATTR_SIZE) != 0) {
713 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
714 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
715 nfs_vmtruncate(inode, attr->ia_size);
717 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
718 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
719 if ((attr->ia_valid & ATTR_MODE) != 0) {
720 int mode = attr->ia_mode & S_IALLUGO;
721 mode |= inode->i_mode & ~S_IALLUGO;
722 inode->i_mode = mode;
724 if ((attr->ia_valid & ATTR_UID) != 0)
725 inode->i_uid = attr->ia_uid;
726 if ((attr->ia_valid & ATTR_GID) != 0)
727 inode->i_gid = attr->ia_gid;
728 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
729 inode->i_ctime = fattr->ctime;
731 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
732 | NFS_INO_INVALID_CTIME);
733 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
734 | NFS_INO_INVALID_ACL);
736 if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
737 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
738 | NFS_INO_INVALID_CTIME);
739 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
740 inode->i_atime = fattr->atime;
741 else if (attr->ia_valid & ATTR_ATIME_SET)
742 inode->i_atime = attr->ia_atime;
744 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
746 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
747 inode->i_ctime = fattr->ctime;
749 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
750 | NFS_INO_INVALID_CTIME);
752 if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
753 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
754 | NFS_INO_INVALID_CTIME);
755 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
756 inode->i_mtime = fattr->mtime;
757 else if (attr->ia_valid & ATTR_MTIME_SET)
758 inode->i_mtime = attr->ia_mtime;
760 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
762 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
763 inode->i_ctime = fattr->ctime;
765 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
766 | NFS_INO_INVALID_CTIME);
769 nfs_update_inode(inode, fattr);
770 spin_unlock(&inode->i_lock);
772 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
774 static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
776 struct dentry *parent;
778 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
780 parent = dget_parent(dentry);
781 nfs_force_use_readdirplus(d_inode(parent));
785 static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
787 struct dentry *parent;
789 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
791 parent = dget_parent(dentry);
792 nfs_advise_use_readdirplus(d_inode(parent));
796 static bool nfs_need_revalidate_inode(struct inode *inode)
798 if (NFS_I(inode)->cache_validity &
799 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
801 if (nfs_attribute_cache_expired(inode))
806 int nfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
807 struct kstat *stat, u32 request_mask, unsigned int query_flags)
809 struct inode *inode = d_inode(path->dentry);
810 struct nfs_server *server = NFS_SERVER(inode);
811 unsigned long cache_validity;
813 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
814 bool do_update = false;
816 trace_nfs_getattr_enter(inode);
818 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
819 nfs_readdirplus_parent_cache_hit(path->dentry);
823 /* Flush out writes to the server in order to update c/mtime. */
824 if ((request_mask & (STATX_CTIME|STATX_MTIME)) &&
825 S_ISREG(inode->i_mode)) {
826 err = filemap_write_and_wait(inode->i_mapping);
832 * We may force a getattr if the user cares about atime.
834 * Note that we only have to check the vfsmount flags here:
835 * - NFS always sets S_NOATIME by so checking it would give a
837 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
838 * no point in checking those.
840 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
841 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
842 request_mask &= ~STATX_ATIME;
844 /* Is the user requesting attributes that might need revalidation? */
845 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
846 STATX_MTIME|STATX_UID|STATX_GID|
847 STATX_SIZE|STATX_BLOCKS)))
848 goto out_no_revalidate;
850 /* Check whether the cached attributes are stale */
851 do_update |= force_sync || nfs_attribute_cache_expired(inode);
852 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
853 do_update |= cache_validity &
854 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL);
855 if (request_mask & STATX_ATIME)
856 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
857 if (request_mask & (STATX_CTIME|STATX_MTIME))
858 do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE;
859 if (request_mask & STATX_BLOCKS)
860 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
862 /* Update the attribute cache */
863 if (!(server->flags & NFS_MOUNT_NOAC))
864 nfs_readdirplus_parent_cache_miss(path->dentry);
866 nfs_readdirplus_parent_cache_hit(path->dentry);
867 err = __nfs_revalidate_inode(server, inode);
871 nfs_readdirplus_parent_cache_hit(path->dentry);
873 /* Only return attributes that were revalidated. */
874 stat->result_mask &= request_mask;
876 generic_fillattr(&init_user_ns, inode, stat);
877 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
878 if (S_ISDIR(inode->i_mode))
879 stat->blksize = NFS_SERVER(inode)->dtsize;
881 trace_nfs_getattr_exit(inode, err);
884 EXPORT_SYMBOL_GPL(nfs_getattr);
886 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
888 refcount_set(&l_ctx->count, 1);
889 l_ctx->lockowner = current->files;
890 INIT_LIST_HEAD(&l_ctx->list);
891 atomic_set(&l_ctx->io_count, 0);
894 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
896 struct nfs_lock_context *pos;
898 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
899 if (pos->lockowner != current->files)
901 if (refcount_inc_not_zero(&pos->count))
907 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
909 struct nfs_lock_context *res, *new = NULL;
910 struct inode *inode = d_inode(ctx->dentry);
913 res = __nfs_find_lock_context(ctx);
916 new = kmalloc(sizeof(*new), GFP_KERNEL);
918 return ERR_PTR(-ENOMEM);
919 nfs_init_lock_context(new);
920 spin_lock(&inode->i_lock);
921 res = __nfs_find_lock_context(ctx);
923 new->open_context = get_nfs_open_context(ctx);
924 if (new->open_context) {
925 list_add_tail_rcu(&new->list,
926 &ctx->lock_context.list);
930 res = ERR_PTR(-EBADF);
932 spin_unlock(&inode->i_lock);
937 EXPORT_SYMBOL_GPL(nfs_get_lock_context);
939 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
941 struct nfs_open_context *ctx = l_ctx->open_context;
942 struct inode *inode = d_inode(ctx->dentry);
944 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
946 list_del_rcu(&l_ctx->list);
947 spin_unlock(&inode->i_lock);
948 put_nfs_open_context(ctx);
949 kfree_rcu(l_ctx, rcu_head);
951 EXPORT_SYMBOL_GPL(nfs_put_lock_context);
954 * nfs_close_context - Common close_context() routine NFSv2/v3
955 * @ctx: pointer to context
956 * @is_sync: is this a synchronous close
958 * Ensure that the attributes are up to date if we're mounted
959 * with close-to-open semantics and we have cached data that will
960 * need to be revalidated on open.
962 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
964 struct nfs_inode *nfsi;
966 struct nfs_server *server;
968 if (!(ctx->mode & FMODE_WRITE))
972 inode = d_inode(ctx->dentry);
973 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
976 if (inode->i_mapping->nrpages == 0)
978 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
980 if (!list_empty(&nfsi->open_files))
982 server = NFS_SERVER(inode);
983 if (server->flags & NFS_MOUNT_NOCTO)
985 nfs_revalidate_inode(server, inode);
987 EXPORT_SYMBOL_GPL(nfs_close_context);
989 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
993 struct nfs_open_context *ctx;
995 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
997 return ERR_PTR(-ENOMEM);
998 nfs_sb_active(dentry->d_sb);
999 ctx->dentry = dget(dentry);
1001 ctx->cred = get_cred(filp->f_cred);
1003 ctx->cred = get_current_cred();
1004 ctx->ll_cred = NULL;
1009 ctx->flock_owner = (fl_owner_t)filp;
1010 nfs_init_lock_context(&ctx->lock_context);
1011 ctx->lock_context.open_context = ctx;
1012 INIT_LIST_HEAD(&ctx->list);
1013 ctx->mdsthreshold = NULL;
1016 EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
1018 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1020 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
1024 EXPORT_SYMBOL_GPL(get_nfs_open_context);
1026 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
1028 struct inode *inode = d_inode(ctx->dentry);
1029 struct super_block *sb = ctx->dentry->d_sb;
1031 if (!refcount_dec_and_test(&ctx->lock_context.count))
1033 if (!list_empty(&ctx->list)) {
1034 spin_lock(&inode->i_lock);
1035 list_del_rcu(&ctx->list);
1036 spin_unlock(&inode->i_lock);
1039 NFS_PROTO(inode)->close_context(ctx, is_sync);
1040 put_cred(ctx->cred);
1042 nfs_sb_deactive(sb);
1043 put_rpccred(ctx->ll_cred);
1044 kfree(ctx->mdsthreshold);
1045 kfree_rcu(ctx, rcu_head);
1048 void put_nfs_open_context(struct nfs_open_context *ctx)
1050 __put_nfs_open_context(ctx, 0);
1052 EXPORT_SYMBOL_GPL(put_nfs_open_context);
1054 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1056 __put_nfs_open_context(ctx, 1);
1060 * Ensure that mmap has a recent RPC credential for use when writing out
1063 void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1065 struct inode *inode = d_inode(ctx->dentry);
1066 struct nfs_inode *nfsi = NFS_I(inode);
1068 spin_lock(&inode->i_lock);
1069 if (list_empty(&nfsi->open_files) &&
1070 (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER))
1071 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA |
1072 NFS_INO_REVAL_FORCED);
1073 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1074 spin_unlock(&inode->i_lock);
1076 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1078 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1080 filp->private_data = get_nfs_open_context(ctx);
1081 if (list_empty(&ctx->list))
1082 nfs_inode_attach_open_context(ctx);
1084 EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1087 * Given an inode, search for an open context with the desired characteristics
1089 struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1091 struct nfs_inode *nfsi = NFS_I(inode);
1092 struct nfs_open_context *pos, *ctx = NULL;
1095 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
1096 if (cred != NULL && cred_fscmp(pos->cred, cred) != 0)
1098 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1100 ctx = get_nfs_open_context(pos);
1108 void nfs_file_clear_open_context(struct file *filp)
1110 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1113 struct inode *inode = d_inode(ctx->dentry);
1116 * We fatal error on write before. Try to writeback
1120 invalidate_inode_pages2(inode->i_mapping);
1121 filp->private_data = NULL;
1122 put_nfs_open_context_sync(ctx);
1127 * These allocate and release file read/write context information.
1129 int nfs_open(struct inode *inode, struct file *filp)
1131 struct nfs_open_context *ctx;
1133 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
1135 return PTR_ERR(ctx);
1136 nfs_file_set_open_context(filp, ctx);
1137 put_nfs_open_context(ctx);
1138 nfs_fscache_open_file(inode, filp);
1141 EXPORT_SYMBOL_GPL(nfs_open);
1144 * This function is called whenever some part of NFS notices that
1145 * the cached attributes have to be refreshed.
1148 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1150 int status = -ESTALE;
1151 struct nfs4_label *label = NULL;
1152 struct nfs_fattr *fattr = NULL;
1153 struct nfs_inode *nfsi = NFS_I(inode);
1155 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1156 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1158 trace_nfs_revalidate_inode_enter(inode);
1160 if (is_bad_inode(inode))
1162 if (NFS_STALE(inode))
1165 /* pNFS: Attributes aren't updated until we layoutcommit */
1166 if (S_ISREG(inode->i_mode)) {
1167 status = pnfs_sync_inode(inode, false);
1173 fattr = nfs_alloc_fattr();
1177 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1179 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1180 if (IS_ERR(label)) {
1181 status = PTR_ERR(label);
1185 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr,
1188 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1190 (unsigned long long)NFS_FILEID(inode), status);
1193 /* A soft timeout occurred. Use cached information? */
1194 if (server->flags & NFS_MOUNT_SOFTREVAL)
1198 if (!S_ISDIR(inode->i_mode))
1199 nfs_set_inode_stale(inode);
1201 nfs_zap_caches(inode);
1206 status = nfs_refresh_inode(inode, fattr);
1208 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1210 (unsigned long long)NFS_FILEID(inode), status);
1214 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1215 nfs_zap_acl_cache(inode);
1217 nfs_setsecurity(inode, fattr, label);
1219 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1221 (unsigned long long)NFS_FILEID(inode));
1224 nfs4_label_free(label);
1226 nfs_free_fattr(fattr);
1227 trace_nfs_revalidate_inode_exit(inode, status);
1231 int nfs_attribute_cache_expired(struct inode *inode)
1233 if (nfs_have_delegated_attributes(inode))
1235 return nfs_attribute_timeout(inode);
1239 * nfs_revalidate_inode - Revalidate the inode attributes
1240 * @server: pointer to nfs_server struct
1241 * @inode: pointer to inode struct
1243 * Updates inode attribute information by retrieving the data from the server.
1245 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1247 if (!nfs_need_revalidate_inode(inode))
1248 return NFS_STALE(inode) ? -ESTALE : 0;
1249 return __nfs_revalidate_inode(server, inode);
1251 EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1253 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
1257 if (mapping->nrpages != 0) {
1258 if (S_ISREG(inode->i_mode)) {
1259 ret = nfs_sync_mapping(mapping);
1263 ret = invalidate_inode_pages2(mapping);
1267 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1268 nfs_fscache_wait_on_invalidate(inode);
1270 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1272 (unsigned long long)NFS_FILEID(inode));
1277 * nfs_clear_invalid_mapping - Conditionally clear a mapping
1278 * @mapping: pointer to mapping
1280 * If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping.
1282 int nfs_clear_invalid_mapping(struct address_space *mapping)
1284 struct inode *inode = mapping->host;
1285 struct nfs_inode *nfsi = NFS_I(inode);
1286 unsigned long *bitlock = &nfsi->flags;
1290 * We must clear NFS_INO_INVALID_DATA first to ensure that
1291 * invalidations that come in while we're shooting down the mappings
1292 * are respected. But, that leaves a race window where one revalidator
1293 * can clear the flag, and then another checks it before the mapping
1294 * gets invalidated. Fix that by serializing access to this part of
1297 * At the same time, we need to allow other tasks to see whether we
1298 * might be in the middle of invalidating the pages, so we only set
1299 * the bit lock here if it looks like we're going to be doing that.
1302 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1303 nfs_wait_bit_killable, TASK_KILLABLE);
1306 spin_lock(&inode->i_lock);
1307 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1308 spin_unlock(&inode->i_lock);
1311 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1313 spin_unlock(&inode->i_lock);
1317 set_bit(NFS_INO_INVALIDATING, bitlock);
1319 nfsi->cache_validity &=
1320 ~(NFS_INO_INVALID_DATA | NFS_INO_DATA_INVAL_DEFER);
1321 spin_unlock(&inode->i_lock);
1322 trace_nfs_invalidate_mapping_enter(inode);
1323 ret = nfs_invalidate_mapping(inode, mapping);
1324 trace_nfs_invalidate_mapping_exit(inode, ret);
1326 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
1327 smp_mb__after_atomic();
1328 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
1333 bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1335 return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
1339 int nfs_revalidate_mapping_rcu(struct inode *inode)
1341 struct nfs_inode *nfsi = NFS_I(inode);
1342 unsigned long *bitlock = &nfsi->flags;
1345 if (IS_SWAPFILE(inode))
1347 if (nfs_mapping_need_revalidate_inode(inode)) {
1351 spin_lock(&inode->i_lock);
1352 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1353 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1355 spin_unlock(&inode->i_lock);
1361 * nfs_revalidate_mapping - Revalidate the pagecache
1362 * @inode: pointer to host inode
1363 * @mapping: pointer to mapping
1365 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1367 /* swapfiles are not supposed to be shared. */
1368 if (IS_SWAPFILE(inode))
1371 if (nfs_mapping_need_revalidate_inode(inode)) {
1372 int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1377 return nfs_clear_invalid_mapping(mapping);
1380 static bool nfs_file_has_writers(struct nfs_inode *nfsi)
1382 struct inode *inode = &nfsi->vfs_inode;
1384 if (!S_ISREG(inode->i_mode))
1386 if (list_empty(&nfsi->open_files))
1388 return inode_is_open_for_write(inode);
1391 static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
1393 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
1396 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1398 struct timespec64 ts;
1400 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1401 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1402 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1403 inode_set_iversion_raw(inode, fattr->change_attr);
1404 if (S_ISDIR(inode->i_mode))
1405 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1406 else if (nfs_server_capable(inode, NFS_CAP_XATTR))
1407 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
1409 /* If we have atomic WCC data, we may update some attributes */
1410 ts = inode->i_ctime;
1411 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1412 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
1413 && timespec64_equal(&ts, &fattr->pre_ctime)) {
1414 inode->i_ctime = fattr->ctime;
1417 ts = inode->i_mtime;
1418 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1419 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
1420 && timespec64_equal(&ts, &fattr->pre_mtime)) {
1421 inode->i_mtime = fattr->mtime;
1422 if (S_ISDIR(inode->i_mode))
1423 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1425 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1426 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1427 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
1428 && !nfs_have_writebacks(inode)) {
1429 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
1434 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1435 * @inode: pointer to inode
1436 * @fattr: updated attributes
1438 * Verifies the attribute cache. If we have just changed the attributes,
1439 * so that fattr carries weak cache consistency data, then it may
1440 * also update the ctime/mtime/change_attribute.
1442 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1444 struct nfs_inode *nfsi = NFS_I(inode);
1445 loff_t cur_size, new_isize;
1446 unsigned long invalid = 0;
1447 struct timespec64 ts;
1449 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1452 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1453 /* Only a mounted-on-fileid? Just exit */
1454 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1456 /* Has the inode gone and changed behind our back? */
1457 } else if (nfsi->fileid != fattr->fileid) {
1458 /* Is this perhaps the mounted-on fileid? */
1459 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1460 nfsi->fileid == fattr->mounted_on_fileid)
1464 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1468 if (!nfs_file_has_buffered_writers(nfsi)) {
1469 /* Verify a few of the more important attributes */
1470 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
1471 invalid |= NFS_INO_INVALID_CHANGE
1472 | NFS_INO_REVAL_PAGECACHE;
1474 ts = inode->i_mtime;
1475 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
1476 invalid |= NFS_INO_INVALID_MTIME;
1478 ts = inode->i_ctime;
1479 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
1480 invalid |= NFS_INO_INVALID_CTIME;
1482 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1483 cur_size = i_size_read(inode);
1484 new_isize = nfs_size_to_loff_t(fattr->size);
1485 if (cur_size != new_isize)
1486 invalid |= NFS_INO_INVALID_SIZE
1487 | NFS_INO_REVAL_PAGECACHE;
1491 /* Have any file permissions changed? */
1492 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
1493 invalid |= NFS_INO_INVALID_ACCESS
1494 | NFS_INO_INVALID_ACL
1495 | NFS_INO_INVALID_OTHER;
1496 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
1497 invalid |= NFS_INO_INVALID_ACCESS
1498 | NFS_INO_INVALID_ACL
1499 | NFS_INO_INVALID_OTHER;
1500 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
1501 invalid |= NFS_INO_INVALID_ACCESS
1502 | NFS_INO_INVALID_ACL
1503 | NFS_INO_INVALID_OTHER;
1505 /* Has the link count changed? */
1506 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
1507 invalid |= NFS_INO_INVALID_OTHER;
1509 ts = inode->i_atime;
1510 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
1511 invalid |= NFS_INO_INVALID_ATIME;
1514 nfs_set_cache_invalid(inode, invalid);
1516 nfsi->read_cache_jiffies = fattr->time_start;
1520 static atomic_long_t nfs_attr_generation_counter;
1522 static unsigned long nfs_read_attr_generation_counter(void)
1524 return atomic_long_read(&nfs_attr_generation_counter);
1527 unsigned long nfs_inc_attr_generation_counter(void)
1529 return atomic_long_inc_return(&nfs_attr_generation_counter);
1531 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
1533 void nfs_fattr_init(struct nfs_fattr *fattr)
1536 fattr->time_start = jiffies;
1537 fattr->gencount = nfs_inc_attr_generation_counter();
1538 fattr->owner_name = NULL;
1539 fattr->group_name = NULL;
1541 EXPORT_SYMBOL_GPL(nfs_fattr_init);
1544 * nfs_fattr_set_barrier
1545 * @fattr: attributes
1547 * Used to set a barrier after an attribute was updated. This
1548 * barrier ensures that older attributes from RPC calls that may
1549 * have raced with our update cannot clobber these new values.
1550 * Note that you are still responsible for ensuring that other
1551 * operations which change the attribute on the server do not
1554 void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1556 fattr->gencount = nfs_inc_attr_generation_counter();
1559 struct nfs_fattr *nfs_alloc_fattr(void)
1561 struct nfs_fattr *fattr;
1563 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1565 nfs_fattr_init(fattr);
1568 EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
1570 struct nfs_fh *nfs_alloc_fhandle(void)
1574 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1579 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
1583 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1584 * in the same way that wireshark does
1588 * For debugging only.
1590 u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1592 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1593 * not on the result */
1594 return nfs_fhandle_hash(fh);
1596 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
1599 * _nfs_display_fhandle - display an NFS file handle on the console
1601 * @fh: file handle to display
1602 * @caption: display caption
1604 * For debugging only.
1606 void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1610 if (fh == NULL || fh->size == 0) {
1611 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1615 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1616 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
1617 for (i = 0; i < fh->size; i += 16) {
1618 __be32 *pos = (__be32 *)&fh->data[i];
1620 switch ((fh->size - i - 1) >> 2) {
1622 printk(KERN_DEFAULT " %08x\n",
1626 printk(KERN_DEFAULT " %08x %08x\n",
1627 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1630 printk(KERN_DEFAULT " %08x %08x %08x\n",
1631 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1632 be32_to_cpup(pos + 2));
1635 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1636 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1637 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1641 EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
1645 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1646 * @inode: pointer to inode
1647 * @fattr: attributes
1649 * Attempt to divine whether or not an RPC call reply carrying stale
1650 * attributes got scheduled after another call carrying updated ones.
1652 * To do so, the function first assumes that a more recent ctime means
1653 * that the attributes in fattr are newer, however it also attempt to
1654 * catch the case where ctime either didn't change, or went backwards
1655 * (if someone reset the clock on the server) by looking at whether
1656 * or not this RPC call was started after the inode was last updated.
1657 * Note also the check for wraparound of 'attr_gencount'
1659 * The function returns 'true' if it thinks the attributes in 'fattr' are
1660 * more recent than the ones cached in the inode.
1663 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1665 const struct nfs_inode *nfsi = NFS_I(inode);
1667 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1668 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1671 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1675 trace_nfs_refresh_inode_enter(inode);
1677 if (nfs_inode_attrs_need_update(inode, fattr))
1678 ret = nfs_update_inode(inode, fattr);
1680 ret = nfs_check_inode_attributes(inode, fattr);
1682 trace_nfs_refresh_inode_exit(inode, ret);
1687 * nfs_refresh_inode - try to update the inode attribute cache
1688 * @inode: pointer to inode
1689 * @fattr: updated attributes
1691 * Check that an RPC call that returned attributes has not overlapped with
1692 * other recent updates of the inode metadata, then decide whether it is
1693 * safe to do a full update of the inode attributes, or whether just to
1694 * call nfs_check_inode_attributes.
1696 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1700 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1702 spin_lock(&inode->i_lock);
1703 status = nfs_refresh_inode_locked(inode, fattr);
1704 spin_unlock(&inode->i_lock);
1708 EXPORT_SYMBOL_GPL(nfs_refresh_inode);
1710 static int nfs_post_op_update_inode_locked(struct inode *inode,
1711 struct nfs_fattr *fattr, unsigned int invalid)
1713 if (S_ISDIR(inode->i_mode))
1714 invalid |= NFS_INO_INVALID_DATA;
1715 nfs_set_cache_invalid(inode, invalid);
1716 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1718 return nfs_refresh_inode_locked(inode, fattr);
1722 * nfs_post_op_update_inode - try to update the inode attribute cache
1723 * @inode: pointer to inode
1724 * @fattr: updated attributes
1726 * After an operation that has changed the inode metadata, mark the
1727 * attribute cache as being invalid, then try to update it.
1729 * NB: if the server didn't return any post op attributes, this
1730 * function will force the retrieval of attributes before the next
1731 * NFS request. Thus it should be used only for operations that
1732 * are expected to change one or more attributes, to avoid
1733 * unnecessary NFS requests and trips through nfs_update_inode().
1735 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1739 spin_lock(&inode->i_lock);
1740 nfs_fattr_set_barrier(fattr);
1741 status = nfs_post_op_update_inode_locked(inode, fattr,
1742 NFS_INO_INVALID_CHANGE
1743 | NFS_INO_INVALID_CTIME
1744 | NFS_INO_REVAL_FORCED);
1745 spin_unlock(&inode->i_lock);
1749 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
1752 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1753 * @inode: pointer to inode
1754 * @fattr: updated attributes
1756 * After an operation that has changed the inode metadata, mark the
1757 * attribute cache as being invalid, then try to update it. Fake up
1758 * weak cache consistency data, if none exist.
1760 * This function is mainly designed to be used by the ->write_done() functions.
1762 int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
1766 /* Don't do a WCC update if these attributes are already stale */
1767 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1768 !nfs_inode_attrs_need_update(inode, fattr)) {
1769 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1770 | NFS_ATTR_FATTR_PRESIZE
1771 | NFS_ATTR_FATTR_PREMTIME
1772 | NFS_ATTR_FATTR_PRECTIME);
1775 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1776 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1777 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
1778 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1780 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1781 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1782 fattr->pre_ctime = inode->i_ctime;
1783 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1785 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1786 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1787 fattr->pre_mtime = inode->i_mtime;
1788 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1790 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1791 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1792 fattr->pre_size = i_size_read(inode);
1793 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1796 status = nfs_post_op_update_inode_locked(inode, fattr,
1797 NFS_INO_INVALID_CHANGE
1798 | NFS_INO_INVALID_CTIME
1799 | NFS_INO_INVALID_MTIME
1800 | NFS_INO_INVALID_BLOCKS);
1805 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1806 * @inode: pointer to inode
1807 * @fattr: updated attributes
1809 * After an operation that has changed the inode metadata, mark the
1810 * attribute cache as being invalid, then try to update it. Fake up
1811 * weak cache consistency data, if none exist.
1813 * This function is mainly designed to be used by the ->write_done() functions.
1815 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1819 spin_lock(&inode->i_lock);
1820 nfs_fattr_set_barrier(fattr);
1821 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
1822 spin_unlock(&inode->i_lock);
1825 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
1829 * Many nfs protocol calls return the new file attributes after
1830 * an operation. Here we update the inode to reflect the state
1831 * of the server's inode.
1833 * This is a bit tricky because we have to make sure all dirty pages
1834 * have been sent off to the server before calling invalidate_inode_pages.
1835 * To make sure no other process adds more write requests while we try
1836 * our best to flush them, we make them sleep during the attribute refresh.
1838 * A very similar scenario holds for the dir cache.
1840 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1842 struct nfs_server *server;
1843 struct nfs_inode *nfsi = NFS_I(inode);
1844 loff_t cur_isize, new_isize;
1845 unsigned long invalid = 0;
1846 unsigned long now = jiffies;
1847 unsigned long save_cache_validity;
1848 bool have_writers = nfs_file_has_buffered_writers(nfsi);
1849 bool cache_revalidated = true;
1850 bool attr_changed = false;
1851 bool have_delegation;
1853 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1854 __func__, inode->i_sb->s_id, inode->i_ino,
1855 nfs_display_fhandle_hash(NFS_FH(inode)),
1856 atomic_read(&inode->i_count), fattr->valid);
1858 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1859 /* Only a mounted-on-fileid? Just exit */
1860 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1862 /* Has the inode gone and changed behind our back? */
1863 } else if (nfsi->fileid != fattr->fileid) {
1864 /* Is this perhaps the mounted-on fileid? */
1865 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1866 nfsi->fileid == fattr->mounted_on_fileid)
1868 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1869 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1870 NFS_SERVER(inode)->nfs_client->cl_hostname,
1871 inode->i_sb->s_id, (long long)nfsi->fileid,
1872 (long long)fattr->fileid);
1877 * Make sure the inode's type hasn't changed.
1879 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1881 * Big trouble! The inode has become a different object.
1883 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
1884 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1888 server = NFS_SERVER(inode);
1889 /* Update the fsid? */
1890 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1891 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1892 !IS_AUTOMOUNT(inode))
1893 server->fsid = fattr->fsid;
1895 /* Save the delegation state before clearing cache_validity */
1896 have_delegation = nfs_have_delegated_attributes(inode);
1899 * Update the read time so we don't revalidate too often.
1901 nfsi->read_cache_jiffies = fattr->time_start;
1903 save_cache_validity = nfsi->cache_validity;
1904 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1905 | NFS_INO_INVALID_ATIME
1906 | NFS_INO_REVAL_FORCED
1907 | NFS_INO_REVAL_PAGECACHE
1908 | NFS_INO_INVALID_BLOCKS);
1910 /* Do atomic weak cache consistency updates */
1911 nfs_wcc_update_inode(inode, fattr);
1913 if (pnfs_layoutcommit_outstanding(inode)) {
1914 nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR;
1915 cache_revalidated = false;
1918 /* More cache consistency checks */
1919 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1920 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
1921 /* Could it be a race with writeback? */
1922 if (!(have_writers || have_delegation)) {
1923 invalid |= NFS_INO_INVALID_DATA
1924 | NFS_INO_INVALID_ACCESS
1925 | NFS_INO_INVALID_ACL
1926 | NFS_INO_INVALID_XATTR;
1927 /* Force revalidate of all attributes */
1928 save_cache_validity |= NFS_INO_INVALID_CTIME
1929 | NFS_INO_INVALID_MTIME
1930 | NFS_INO_INVALID_SIZE
1931 | NFS_INO_INVALID_OTHER;
1932 if (S_ISDIR(inode->i_mode))
1933 nfs_force_lookup_revalidate(inode);
1934 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1937 } else if (!have_delegation)
1938 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1939 inode_set_iversion_raw(inode, fattr->change_attr);
1940 attr_changed = true;
1943 nfsi->cache_validity |= save_cache_validity &
1944 (NFS_INO_INVALID_CHANGE
1945 | NFS_INO_REVAL_PAGECACHE
1946 | NFS_INO_REVAL_FORCED);
1947 cache_revalidated = false;
1950 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1951 inode->i_mtime = fattr->mtime;
1952 } else if (server->caps & NFS_CAP_MTIME) {
1953 nfsi->cache_validity |= save_cache_validity &
1954 (NFS_INO_INVALID_MTIME
1955 | NFS_INO_REVAL_FORCED);
1956 cache_revalidated = false;
1959 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1960 inode->i_ctime = fattr->ctime;
1961 } else if (server->caps & NFS_CAP_CTIME) {
1962 nfsi->cache_validity |= save_cache_validity &
1963 (NFS_INO_INVALID_CTIME
1964 | NFS_INO_REVAL_FORCED);
1965 cache_revalidated = false;
1968 /* Check if our cached file size is stale */
1969 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1970 new_isize = nfs_size_to_loff_t(fattr->size);
1971 cur_isize = i_size_read(inode);
1972 if (new_isize != cur_isize && !have_delegation) {
1973 /* Do we perhaps have any outstanding writes, or has
1974 * the file grown beyond our last write? */
1975 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
1976 i_size_write(inode, new_isize);
1978 invalid |= NFS_INO_INVALID_DATA;
1979 attr_changed = true;
1981 dprintk("NFS: isize change on server for file %s/%ld "
1985 (long long)cur_isize,
1986 (long long)new_isize);
1989 nfsi->cache_validity |= save_cache_validity &
1990 (NFS_INO_INVALID_SIZE
1991 | NFS_INO_REVAL_PAGECACHE
1992 | NFS_INO_REVAL_FORCED);
1993 cache_revalidated = false;
1997 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1998 inode->i_atime = fattr->atime;
1999 else if (server->caps & NFS_CAP_ATIME) {
2000 nfsi->cache_validity |= save_cache_validity &
2001 (NFS_INO_INVALID_ATIME
2002 | NFS_INO_REVAL_FORCED);
2003 cache_revalidated = false;
2006 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
2007 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
2008 umode_t newmode = inode->i_mode & S_IFMT;
2009 newmode |= fattr->mode & S_IALLUGO;
2010 inode->i_mode = newmode;
2011 invalid |= NFS_INO_INVALID_ACCESS
2012 | NFS_INO_INVALID_ACL;
2013 attr_changed = true;
2015 } else if (server->caps & NFS_CAP_MODE) {
2016 nfsi->cache_validity |= save_cache_validity &
2017 (NFS_INO_INVALID_OTHER
2018 | NFS_INO_REVAL_FORCED);
2019 cache_revalidated = false;
2022 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
2023 if (!uid_eq(inode->i_uid, fattr->uid)) {
2024 invalid |= NFS_INO_INVALID_ACCESS
2025 | NFS_INO_INVALID_ACL;
2026 inode->i_uid = fattr->uid;
2027 attr_changed = true;
2029 } else if (server->caps & NFS_CAP_OWNER) {
2030 nfsi->cache_validity |= save_cache_validity &
2031 (NFS_INO_INVALID_OTHER
2032 | NFS_INO_REVAL_FORCED);
2033 cache_revalidated = false;
2036 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
2037 if (!gid_eq(inode->i_gid, fattr->gid)) {
2038 invalid |= NFS_INO_INVALID_ACCESS
2039 | NFS_INO_INVALID_ACL;
2040 inode->i_gid = fattr->gid;
2041 attr_changed = true;
2043 } else if (server->caps & NFS_CAP_OWNER_GROUP) {
2044 nfsi->cache_validity |= save_cache_validity &
2045 (NFS_INO_INVALID_OTHER
2046 | NFS_INO_REVAL_FORCED);
2047 cache_revalidated = false;
2050 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
2051 if (inode->i_nlink != fattr->nlink) {
2052 if (S_ISDIR(inode->i_mode))
2053 invalid |= NFS_INO_INVALID_DATA;
2054 set_nlink(inode, fattr->nlink);
2055 attr_changed = true;
2057 } else if (server->caps & NFS_CAP_NLINK) {
2058 nfsi->cache_validity |= save_cache_validity &
2059 (NFS_INO_INVALID_OTHER
2060 | NFS_INO_REVAL_FORCED);
2061 cache_revalidated = false;
2064 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
2066 * report the blocks in 512byte units
2068 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
2069 } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
2070 inode->i_blocks = fattr->du.nfs2.blocks;
2072 nfsi->cache_validity |= save_cache_validity &
2073 (NFS_INO_INVALID_BLOCKS
2074 | NFS_INO_REVAL_FORCED);
2075 cache_revalidated = false;
2078 /* Update attrtimeo value if we're out of the unstable period */
2080 invalid &= ~NFS_INO_INVALID_ATTR;
2081 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
2082 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
2083 nfsi->attrtimeo_timestamp = now;
2084 /* Set barrier to be more recent than all outstanding updates */
2085 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
2087 if (cache_revalidated) {
2088 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2089 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2090 nfsi->attrtimeo <<= 1;
2091 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2092 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2094 nfsi->attrtimeo_timestamp = now;
2096 /* Set the barrier to be more recent than this fattr */
2097 if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0)
2098 nfsi->attr_gencount = fattr->gencount;
2101 /* Don't invalidate the data if we were to blame */
2102 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2103 || S_ISLNK(inode->i_mode)))
2104 invalid &= ~NFS_INO_INVALID_DATA;
2105 nfs_set_cache_invalid(inode, invalid);
2110 * No need to worry about unhashing the dentry, as the
2111 * lookup validation will know that the inode is bad.
2112 * (But we fall through to invalidate the caches.)
2114 nfs_set_inode_stale_locked(inode);
2118 struct inode *nfs_alloc_inode(struct super_block *sb)
2120 struct nfs_inode *nfsi;
2121 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
2125 nfsi->cache_validity = 0UL;
2126 #if IS_ENABLED(CONFIG_NFS_V4)
2127 nfsi->nfs4_acl = NULL;
2128 #endif /* CONFIG_NFS_V4 */
2129 #ifdef CONFIG_NFS_V4_2
2130 nfsi->xattr_cache = NULL;
2132 return &nfsi->vfs_inode;
2134 EXPORT_SYMBOL_GPL(nfs_alloc_inode);
2136 void nfs_free_inode(struct inode *inode)
2138 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2140 EXPORT_SYMBOL_GPL(nfs_free_inode);
2142 static inline void nfs4_init_once(struct nfs_inode *nfsi)
2144 #if IS_ENABLED(CONFIG_NFS_V4)
2145 INIT_LIST_HEAD(&nfsi->open_states);
2146 nfsi->delegation = NULL;
2147 init_rwsem(&nfsi->rwsem);
2148 nfsi->layout = NULL;
2152 static void init_once(void *foo)
2154 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2156 inode_init_once(&nfsi->vfs_inode);
2157 INIT_LIST_HEAD(&nfsi->open_files);
2158 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2159 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
2160 INIT_LIST_HEAD(&nfsi->commit_info.list);
2161 atomic_long_set(&nfsi->nrequests, 0);
2162 atomic_long_set(&nfsi->commit_info.ncommit, 0);
2163 atomic_set(&nfsi->commit_info.rpcs_out, 0);
2164 init_rwsem(&nfsi->rmdir_sem);
2165 mutex_init(&nfsi->commit_mutex);
2166 nfs4_init_once(nfsi);
2167 nfsi->cache_change_attribute = 0;
2170 static int __init nfs_init_inodecache(void)
2172 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2173 sizeof(struct nfs_inode),
2174 0, (SLAB_RECLAIM_ACCOUNT|
2175 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
2177 if (nfs_inode_cachep == NULL)
2183 static void nfs_destroy_inodecache(void)
2186 * Make sure all delayed rcu free inodes are flushed before we
2190 kmem_cache_destroy(nfs_inode_cachep);
2193 struct workqueue_struct *nfsiod_workqueue;
2194 EXPORT_SYMBOL_GPL(nfsiod_workqueue);
2197 * start up the nfsiod workqueue
2199 static int nfsiod_start(void)
2201 struct workqueue_struct *wq;
2202 dprintk("RPC: creating workqueue nfsiod\n");
2203 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
2206 nfsiod_workqueue = wq;
2211 * Destroy the nfsiod workqueue
2213 static void nfsiod_stop(void)
2215 struct workqueue_struct *wq;
2217 wq = nfsiod_workqueue;
2220 nfsiod_workqueue = NULL;
2221 destroy_workqueue(wq);
2224 unsigned int nfs_net_id;
2225 EXPORT_SYMBOL_GPL(nfs_net_id);
2227 static int nfs_net_init(struct net *net)
2229 nfs_clients_init(net);
2230 return nfs_fs_proc_net_init(net);
2233 static void nfs_net_exit(struct net *net)
2235 nfs_fs_proc_net_exit(net);
2236 nfs_clients_exit(net);
2239 static struct pernet_operations nfs_net_ops = {
2240 .init = nfs_net_init,
2241 .exit = nfs_net_exit,
2243 .size = sizeof(struct nfs_net),
2249 static int __init init_nfs_fs(void)
2253 err = nfs_sysfs_init();
2257 err = register_pernet_subsys(&nfs_net_ops);
2261 err = nfs_fscache_register();
2265 err = nfsiod_start();
2269 err = nfs_fs_proc_init();
2273 err = nfs_init_nfspagecache();
2277 err = nfs_init_inodecache();
2281 err = nfs_init_readpagecache();
2285 err = nfs_init_writepagecache();
2289 err = nfs_init_directcache();
2293 rpc_proc_register(&init_net, &nfs_rpcstat);
2295 err = register_nfs_fs();
2301 rpc_proc_unregister(&init_net, "nfs");
2302 nfs_destroy_directcache();
2304 nfs_destroy_writepagecache();
2306 nfs_destroy_readpagecache();
2308 nfs_destroy_inodecache();
2310 nfs_destroy_nfspagecache();
2316 nfs_fscache_unregister();
2318 unregister_pernet_subsys(&nfs_net_ops);
2325 static void __exit exit_nfs_fs(void)
2327 nfs_destroy_directcache();
2328 nfs_destroy_writepagecache();
2329 nfs_destroy_readpagecache();
2330 nfs_destroy_inodecache();
2331 nfs_destroy_nfspagecache();
2332 nfs_fscache_unregister();
2333 unregister_pernet_subsys(&nfs_net_ops);
2334 rpc_proc_unregister(&init_net, "nfs");
2335 unregister_nfs_fs();
2341 /* Not quite true; I just maintain it */
2343 MODULE_LICENSE("GPL");
2344 module_param(enable_ino64, bool, 0644);
2346 module_init(init_nfs_fs)
2347 module_exit(exit_nfs_fs)