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 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 static 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);
234 * Invalidate the local caches
236 static void nfs_zap_caches_locked(struct inode *inode)
238 struct nfs_inode *nfsi = NFS_I(inode);
239 int mode = inode->i_mode;
241 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
243 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
244 nfsi->attrtimeo_timestamp = jiffies;
246 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
247 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
248 | NFS_INO_INVALID_DATA
249 | NFS_INO_INVALID_ACCESS
250 | NFS_INO_INVALID_ACL
251 | NFS_INO_INVALID_XATTR
252 | NFS_INO_REVAL_PAGECACHE);
254 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
255 | NFS_INO_INVALID_ACCESS
256 | NFS_INO_INVALID_ACL
257 | NFS_INO_INVALID_XATTR
258 | NFS_INO_REVAL_PAGECACHE);
259 nfs_zap_label_cache_locked(nfsi);
262 void nfs_zap_caches(struct inode *inode)
264 spin_lock(&inode->i_lock);
265 nfs_zap_caches_locked(inode);
266 spin_unlock(&inode->i_lock);
269 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
271 if (mapping->nrpages != 0) {
272 spin_lock(&inode->i_lock);
273 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
274 spin_unlock(&inode->i_lock);
278 void nfs_zap_acl_cache(struct inode *inode)
280 void (*clear_acl_cache)(struct inode *);
282 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
283 if (clear_acl_cache != NULL)
284 clear_acl_cache(inode);
285 spin_lock(&inode->i_lock);
286 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
287 spin_unlock(&inode->i_lock);
289 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
291 void nfs_invalidate_atime(struct inode *inode)
293 spin_lock(&inode->i_lock);
294 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
295 spin_unlock(&inode->i_lock);
297 EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
300 * Invalidate, but do not unhash, the inode.
301 * NB: must be called with inode->i_lock held!
303 static void nfs_set_inode_stale_locked(struct inode *inode)
305 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
306 nfs_zap_caches_locked(inode);
307 trace_nfs_set_inode_stale(inode);
310 void nfs_set_inode_stale(struct inode *inode)
312 spin_lock(&inode->i_lock);
313 nfs_set_inode_stale_locked(inode);
314 spin_unlock(&inode->i_lock);
317 struct nfs_find_desc {
319 struct nfs_fattr *fattr;
323 * In NFSv3 we can have 64bit inode numbers. In order to support
324 * this, and re-exported directories (also seen in NFSv2)
325 * we are forced to allow 2 different inodes to have the same
329 nfs_find_actor(struct inode *inode, void *opaque)
331 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
332 struct nfs_fh *fh = desc->fh;
333 struct nfs_fattr *fattr = desc->fattr;
335 if (NFS_FILEID(inode) != fattr->fileid)
337 if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode))
339 if (nfs_compare_fh(NFS_FH(inode), fh))
341 if (is_bad_inode(inode) || NFS_STALE(inode))
347 nfs_init_locked(struct inode *inode, void *opaque)
349 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
350 struct nfs_fattr *fattr = desc->fattr;
352 set_nfs_fileid(inode, fattr->fileid);
353 inode->i_mode = fattr->mode;
354 nfs_copy_fh(NFS_FH(inode), desc->fh);
358 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
359 static void nfs_clear_label_invalid(struct inode *inode)
361 spin_lock(&inode->i_lock);
362 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
363 spin_unlock(&inode->i_lock);
366 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
367 struct nfs4_label *label)
374 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
375 error = security_inode_notifysecctx(inode, label->label,
378 printk(KERN_ERR "%s() %s %d "
379 "security_inode_notifysecctx() %d\n",
381 (char *)label->label,
383 nfs_clear_label_invalid(inode);
387 struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
389 struct nfs4_label *label = NULL;
390 int minor_version = server->nfs_client->cl_minorversion;
392 if (minor_version < 2)
395 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
398 label = kzalloc(sizeof(struct nfs4_label), flags);
400 return ERR_PTR(-ENOMEM);
402 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
403 if (label->label == NULL) {
405 return ERR_PTR(-ENOMEM);
407 label->len = NFS4_MAXLABELLEN;
411 EXPORT_SYMBOL_GPL(nfs4_label_alloc);
413 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
414 struct nfs4_label *label)
418 EXPORT_SYMBOL_GPL(nfs_setsecurity);
420 /* Search for inode identified by fh, fileid and i_mode in inode cache. */
422 nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
424 struct nfs_find_desc desc = {
431 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
432 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
435 hash = nfs_fattr_to_ino_t(fattr);
436 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
438 dprintk("%s: returning %p\n", __func__, inode);
443 * This is our front-end to iget that looks up inodes by file handle
444 * instead of inode number.
447 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
449 struct nfs_find_desc desc = {
453 struct inode *inode = ERR_PTR(-ENOENT);
456 nfs_attr_check_mountpoint(sb, fattr);
458 if (nfs_attr_use_mounted_on_fileid(fattr))
459 fattr->fileid = fattr->mounted_on_fileid;
460 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
462 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
465 hash = nfs_fattr_to_ino_t(fattr);
467 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
469 inode = ERR_PTR(-ENOMEM);
473 if (inode->i_state & I_NEW) {
474 struct nfs_inode *nfsi = NFS_I(inode);
475 unsigned long now = jiffies;
477 /* We set i_ino for the few things that still rely on it,
481 /* We can't support update_atime(), since the server will reset it */
482 inode->i_flags |= S_NOATIME|S_NOCMTIME;
483 inode->i_mode = fattr->mode;
484 nfsi->cache_validity = 0;
485 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
486 && nfs_server_capable(inode, NFS_CAP_MODE))
487 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
488 /* Why so? Because we want revalidate for devices/FIFOs, and
489 * that's precisely what we have in nfs_file_inode_operations.
491 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
492 if (S_ISREG(inode->i_mode)) {
493 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
494 inode->i_data.a_ops = &nfs_file_aops;
495 } else if (S_ISDIR(inode->i_mode)) {
496 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
497 inode->i_fop = &nfs_dir_operations;
498 inode->i_data.a_ops = &nfs_dir_aops;
499 /* Deal with crossing mountpoints */
500 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
501 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
502 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
503 inode->i_op = &nfs_referral_inode_operations;
505 inode->i_op = &nfs_mountpoint_inode_operations;
507 inode->i_flags |= S_AUTOMOUNT;
509 } else if (S_ISLNK(inode->i_mode)) {
510 inode->i_op = &nfs_symlink_inode_operations;
511 inode_nohighmem(inode);
513 init_special_inode(inode, inode->i_mode, fattr->rdev);
515 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
516 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
517 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
518 inode_set_iversion_raw(inode, 0);
521 inode->i_uid = make_kuid(&init_user_ns, -2);
522 inode->i_gid = make_kgid(&init_user_ns, -2);
524 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
528 nfsi->read_cache_jiffies = fattr->time_start;
529 nfsi->attr_gencount = fattr->gencount;
530 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
531 inode->i_atime = fattr->atime;
532 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
533 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
534 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
535 inode->i_mtime = fattr->mtime;
536 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
537 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
538 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
539 inode->i_ctime = fattr->ctime;
540 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
541 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
542 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
543 inode_set_iversion_raw(inode, fattr->change_attr);
545 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
546 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
547 inode->i_size = nfs_size_to_loff_t(fattr->size);
549 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
550 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
551 set_nlink(inode, fattr->nlink);
552 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
553 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
554 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
555 inode->i_uid = fattr->uid;
556 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
557 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
558 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
559 inode->i_gid = fattr->gid;
560 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
561 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
562 if (nfs_server_capable(inode, NFS_CAP_XATTR))
563 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
564 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
565 inode->i_blocks = fattr->du.nfs2.blocks;
566 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
568 * report the blocks in 512byte units
570 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
573 if (nfsi->cache_validity != 0)
574 nfsi->cache_validity |= NFS_INO_REVAL_FORCED;
576 nfs_setsecurity(inode, fattr, label);
578 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
579 nfsi->attrtimeo_timestamp = now;
580 nfsi->access_cache = RB_ROOT;
582 nfs_fscache_init_inode(inode);
584 unlock_new_inode(inode);
586 int err = nfs_refresh_inode(inode, fattr);
589 inode = ERR_PTR(err);
593 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
595 (unsigned long long)NFS_FILEID(inode),
596 nfs_display_fhandle_hash(fh),
597 atomic_read(&inode->i_count));
603 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
606 EXPORT_SYMBOL_GPL(nfs_fhget);
608 #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)
611 nfs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
614 struct inode *inode = d_inode(dentry);
615 struct nfs_fattr *fattr;
618 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
620 /* skip mode change if it's just for clearing setuid/setgid */
621 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
622 attr->ia_valid &= ~ATTR_MODE;
624 if (attr->ia_valid & ATTR_SIZE) {
625 BUG_ON(!S_ISREG(inode->i_mode));
627 error = inode_newsize_ok(inode, attr->ia_size);
631 if (attr->ia_size == i_size_read(inode))
632 attr->ia_valid &= ~ATTR_SIZE;
635 /* Optimization: if the end result is no change, don't RPC */
636 attr->ia_valid &= NFS_VALID_ATTRS;
637 if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
640 trace_nfs_setattr_enter(inode);
642 /* Write all dirty data */
643 if (S_ISREG(inode->i_mode))
644 nfs_sync_inode(inode);
646 fattr = nfs_alloc_fattr();
652 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
654 error = nfs_refresh_inode(inode, fattr);
655 nfs_free_fattr(fattr);
657 trace_nfs_setattr_exit(inode, error);
660 EXPORT_SYMBOL_GPL(nfs_setattr);
663 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
664 * @inode: inode of the file used
665 * @offset: file offset to start truncating
667 * This is a copy of the common vmtruncate, but with the locking
668 * corrected to take into account the fact that NFS requires
669 * inode->i_size to be updated under the inode->i_lock.
670 * Note: must be called with inode->i_lock held!
672 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
676 err = inode_newsize_ok(inode, offset);
680 i_size_write(inode, offset);
683 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_DATA |
684 NFS_INO_DATA_INVAL_DEFER);
685 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
687 spin_unlock(&inode->i_lock);
688 truncate_pagecache(inode, offset);
689 spin_lock(&inode->i_lock);
695 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
696 * @inode: pointer to struct inode
697 * @attr: pointer to struct iattr
698 * @fattr: pointer to struct nfs_fattr
700 * Note: we do this in the *proc.c in order to ensure that
701 * it works for things like exclusive creates too.
703 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
704 struct nfs_fattr *fattr)
706 /* Barrier: bump the attribute generation count. */
707 nfs_fattr_set_barrier(fattr);
709 spin_lock(&inode->i_lock);
710 NFS_I(inode)->attr_gencount = fattr->gencount;
711 if ((attr->ia_valid & ATTR_SIZE) != 0) {
712 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
713 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
714 nfs_vmtruncate(inode, attr->ia_size);
716 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
717 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_CTIME;
718 if ((attr->ia_valid & ATTR_MODE) != 0) {
719 int mode = attr->ia_mode & S_IALLUGO;
720 mode |= inode->i_mode & ~S_IALLUGO;
721 inode->i_mode = mode;
723 if ((attr->ia_valid & ATTR_UID) != 0)
724 inode->i_uid = attr->ia_uid;
725 if ((attr->ia_valid & ATTR_GID) != 0)
726 inode->i_gid = attr->ia_gid;
727 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
728 inode->i_ctime = fattr->ctime;
730 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
731 | NFS_INO_INVALID_CTIME);
732 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
733 | NFS_INO_INVALID_ACL);
735 if (attr->ia_valid & (ATTR_ATIME_SET|ATTR_ATIME)) {
736 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_ATIME
737 | NFS_INO_INVALID_CTIME);
738 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
739 inode->i_atime = fattr->atime;
740 else if (attr->ia_valid & ATTR_ATIME_SET)
741 inode->i_atime = attr->ia_atime;
743 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
745 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
746 inode->i_ctime = fattr->ctime;
748 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
749 | NFS_INO_INVALID_CTIME);
751 if (attr->ia_valid & (ATTR_MTIME_SET|ATTR_MTIME)) {
752 NFS_I(inode)->cache_validity &= ~(NFS_INO_INVALID_MTIME
753 | NFS_INO_INVALID_CTIME);
754 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
755 inode->i_mtime = fattr->mtime;
756 else if (attr->ia_valid & ATTR_MTIME_SET)
757 inode->i_mtime = attr->ia_mtime;
759 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
761 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
762 inode->i_ctime = fattr->ctime;
764 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
765 | NFS_INO_INVALID_CTIME);
768 nfs_update_inode(inode, fattr);
769 spin_unlock(&inode->i_lock);
771 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
773 static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
775 struct dentry *parent;
777 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
779 parent = dget_parent(dentry);
780 nfs_force_use_readdirplus(d_inode(parent));
784 static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
786 struct dentry *parent;
788 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
790 parent = dget_parent(dentry);
791 nfs_advise_use_readdirplus(d_inode(parent));
795 static bool nfs_need_revalidate_inode(struct inode *inode)
797 if (NFS_I(inode)->cache_validity &
798 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
800 if (nfs_attribute_cache_expired(inode))
805 int nfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
806 struct kstat *stat, u32 request_mask, unsigned int query_flags)
808 struct inode *inode = d_inode(path->dentry);
809 struct nfs_server *server = NFS_SERVER(inode);
810 unsigned long cache_validity;
812 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
813 bool do_update = false;
815 trace_nfs_getattr_enter(inode);
817 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
818 nfs_readdirplus_parent_cache_hit(path->dentry);
822 /* Flush out writes to the server in order to update c/mtime. */
823 if ((request_mask & (STATX_CTIME|STATX_MTIME)) &&
824 S_ISREG(inode->i_mode)) {
825 err = filemap_write_and_wait(inode->i_mapping);
831 * We may force a getattr if the user cares about atime.
833 * Note that we only have to check the vfsmount flags here:
834 * - NFS always sets S_NOATIME by so checking it would give a
836 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
837 * no point in checking those.
839 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
840 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
841 request_mask &= ~STATX_ATIME;
843 /* Is the user requesting attributes that might need revalidation? */
844 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
845 STATX_MTIME|STATX_UID|STATX_GID|
846 STATX_SIZE|STATX_BLOCKS)))
847 goto out_no_revalidate;
849 /* Check whether the cached attributes are stale */
850 do_update |= force_sync || nfs_attribute_cache_expired(inode);
851 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
852 do_update |= cache_validity &
853 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL);
854 if (request_mask & STATX_ATIME)
855 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
856 if (request_mask & (STATX_CTIME|STATX_MTIME))
857 do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE;
858 if (request_mask & STATX_BLOCKS)
859 do_update |= cache_validity & NFS_INO_INVALID_BLOCKS;
861 /* Update the attribute cache */
862 if (!(server->flags & NFS_MOUNT_NOAC))
863 nfs_readdirplus_parent_cache_miss(path->dentry);
865 nfs_readdirplus_parent_cache_hit(path->dentry);
866 err = __nfs_revalidate_inode(server, inode);
870 nfs_readdirplus_parent_cache_hit(path->dentry);
872 /* Only return attributes that were revalidated. */
873 stat->result_mask &= request_mask;
875 generic_fillattr(&init_user_ns, inode, stat);
876 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
877 if (S_ISDIR(inode->i_mode))
878 stat->blksize = NFS_SERVER(inode)->dtsize;
880 trace_nfs_getattr_exit(inode, err);
883 EXPORT_SYMBOL_GPL(nfs_getattr);
885 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
887 refcount_set(&l_ctx->count, 1);
888 l_ctx->lockowner = current->files;
889 INIT_LIST_HEAD(&l_ctx->list);
890 atomic_set(&l_ctx->io_count, 0);
893 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
895 struct nfs_lock_context *pos;
897 list_for_each_entry_rcu(pos, &ctx->lock_context.list, list) {
898 if (pos->lockowner != current->files)
900 if (refcount_inc_not_zero(&pos->count))
906 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
908 struct nfs_lock_context *res, *new = NULL;
909 struct inode *inode = d_inode(ctx->dentry);
912 res = __nfs_find_lock_context(ctx);
915 new = kmalloc(sizeof(*new), GFP_KERNEL);
917 return ERR_PTR(-ENOMEM);
918 nfs_init_lock_context(new);
919 spin_lock(&inode->i_lock);
920 res = __nfs_find_lock_context(ctx);
922 new->open_context = get_nfs_open_context(ctx);
923 if (new->open_context) {
924 list_add_tail_rcu(&new->list,
925 &ctx->lock_context.list);
929 res = ERR_PTR(-EBADF);
931 spin_unlock(&inode->i_lock);
936 EXPORT_SYMBOL_GPL(nfs_get_lock_context);
938 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
940 struct nfs_open_context *ctx = l_ctx->open_context;
941 struct inode *inode = d_inode(ctx->dentry);
943 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
945 list_del_rcu(&l_ctx->list);
946 spin_unlock(&inode->i_lock);
947 put_nfs_open_context(ctx);
948 kfree_rcu(l_ctx, rcu_head);
950 EXPORT_SYMBOL_GPL(nfs_put_lock_context);
953 * nfs_close_context - Common close_context() routine NFSv2/v3
954 * @ctx: pointer to context
955 * @is_sync: is this a synchronous close
957 * Ensure that the attributes are up to date if we're mounted
958 * with close-to-open semantics and we have cached data that will
959 * need to be revalidated on open.
961 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
963 struct nfs_inode *nfsi;
965 struct nfs_server *server;
967 if (!(ctx->mode & FMODE_WRITE))
971 inode = d_inode(ctx->dentry);
972 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
975 if (inode->i_mapping->nrpages == 0)
977 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
979 if (!list_empty(&nfsi->open_files))
981 server = NFS_SERVER(inode);
982 if (server->flags & NFS_MOUNT_NOCTO)
984 nfs_revalidate_inode(server, inode);
986 EXPORT_SYMBOL_GPL(nfs_close_context);
988 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
992 struct nfs_open_context *ctx;
994 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
996 return ERR_PTR(-ENOMEM);
997 nfs_sb_active(dentry->d_sb);
998 ctx->dentry = dget(dentry);
1000 ctx->cred = get_cred(filp->f_cred);
1002 ctx->cred = get_current_cred();
1003 ctx->ll_cred = NULL;
1008 ctx->flock_owner = (fl_owner_t)filp;
1009 nfs_init_lock_context(&ctx->lock_context);
1010 ctx->lock_context.open_context = ctx;
1011 INIT_LIST_HEAD(&ctx->list);
1012 ctx->mdsthreshold = NULL;
1015 EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
1017 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
1019 if (ctx != NULL && refcount_inc_not_zero(&ctx->lock_context.count))
1023 EXPORT_SYMBOL_GPL(get_nfs_open_context);
1025 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
1027 struct inode *inode = d_inode(ctx->dentry);
1028 struct super_block *sb = ctx->dentry->d_sb;
1030 if (!refcount_dec_and_test(&ctx->lock_context.count))
1032 if (!list_empty(&ctx->list)) {
1033 spin_lock(&inode->i_lock);
1034 list_del_rcu(&ctx->list);
1035 spin_unlock(&inode->i_lock);
1038 NFS_PROTO(inode)->close_context(ctx, is_sync);
1039 put_cred(ctx->cred);
1041 nfs_sb_deactive(sb);
1042 put_rpccred(ctx->ll_cred);
1043 kfree(ctx->mdsthreshold);
1044 kfree_rcu(ctx, rcu_head);
1047 void put_nfs_open_context(struct nfs_open_context *ctx)
1049 __put_nfs_open_context(ctx, 0);
1051 EXPORT_SYMBOL_GPL(put_nfs_open_context);
1053 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
1055 __put_nfs_open_context(ctx, 1);
1059 * Ensure that mmap has a recent RPC credential for use when writing out
1062 void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
1064 struct inode *inode = d_inode(ctx->dentry);
1065 struct nfs_inode *nfsi = NFS_I(inode);
1067 spin_lock(&inode->i_lock);
1068 if (list_empty(&nfsi->open_files) &&
1069 (nfsi->cache_validity & NFS_INO_DATA_INVAL_DEFER))
1070 nfsi->cache_validity |= NFS_INO_INVALID_DATA |
1071 NFS_INO_REVAL_FORCED;
1072 list_add_tail_rcu(&ctx->list, &nfsi->open_files);
1073 spin_unlock(&inode->i_lock);
1075 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
1077 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
1079 filp->private_data = get_nfs_open_context(ctx);
1080 if (list_empty(&ctx->list))
1081 nfs_inode_attach_open_context(ctx);
1083 EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1086 * Given an inode, search for an open context with the desired characteristics
1088 struct nfs_open_context *nfs_find_open_context(struct inode *inode, const struct cred *cred, fmode_t mode)
1090 struct nfs_inode *nfsi = NFS_I(inode);
1091 struct nfs_open_context *pos, *ctx = NULL;
1094 list_for_each_entry_rcu(pos, &nfsi->open_files, list) {
1095 if (cred != NULL && cred_fscmp(pos->cred, cred) != 0)
1097 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1099 ctx = get_nfs_open_context(pos);
1107 void nfs_file_clear_open_context(struct file *filp)
1109 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1112 struct inode *inode = d_inode(ctx->dentry);
1115 * We fatal error on write before. Try to writeback
1119 invalidate_inode_pages2(inode->i_mapping);
1120 filp->private_data = NULL;
1121 put_nfs_open_context_sync(ctx);
1126 * These allocate and release file read/write context information.
1128 int nfs_open(struct inode *inode, struct file *filp)
1130 struct nfs_open_context *ctx;
1132 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
1134 return PTR_ERR(ctx);
1135 nfs_file_set_open_context(filp, ctx);
1136 put_nfs_open_context(ctx);
1137 nfs_fscache_open_file(inode, filp);
1140 EXPORT_SYMBOL_GPL(nfs_open);
1143 * This function is called whenever some part of NFS notices that
1144 * the cached attributes have to be refreshed.
1147 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1149 int status = -ESTALE;
1150 struct nfs4_label *label = NULL;
1151 struct nfs_fattr *fattr = NULL;
1152 struct nfs_inode *nfsi = NFS_I(inode);
1154 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1155 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1157 trace_nfs_revalidate_inode_enter(inode);
1159 if (is_bad_inode(inode))
1161 if (NFS_STALE(inode))
1164 /* pNFS: Attributes aren't updated until we layoutcommit */
1165 if (S_ISREG(inode->i_mode)) {
1166 status = pnfs_sync_inode(inode, false);
1172 fattr = nfs_alloc_fattr();
1176 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1178 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1179 if (IS_ERR(label)) {
1180 status = PTR_ERR(label);
1184 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr,
1187 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1189 (unsigned long long)NFS_FILEID(inode), status);
1192 /* A soft timeout occurred. Use cached information? */
1193 if (server->flags & NFS_MOUNT_SOFTREVAL)
1197 if (!S_ISDIR(inode->i_mode))
1198 nfs_set_inode_stale(inode);
1200 nfs_zap_caches(inode);
1205 status = nfs_refresh_inode(inode, fattr);
1207 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1209 (unsigned long long)NFS_FILEID(inode), status);
1213 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1214 nfs_zap_acl_cache(inode);
1216 nfs_setsecurity(inode, fattr, label);
1218 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1220 (unsigned long long)NFS_FILEID(inode));
1223 nfs4_label_free(label);
1225 nfs_free_fattr(fattr);
1226 trace_nfs_revalidate_inode_exit(inode, status);
1230 int nfs_attribute_cache_expired(struct inode *inode)
1232 if (nfs_have_delegated_attributes(inode))
1234 return nfs_attribute_timeout(inode);
1238 * nfs_revalidate_inode - Revalidate the inode attributes
1239 * @server: pointer to nfs_server struct
1240 * @inode: pointer to inode struct
1242 * Updates inode attribute information by retrieving the data from the server.
1244 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1246 if (!nfs_need_revalidate_inode(inode))
1247 return NFS_STALE(inode) ? -ESTALE : 0;
1248 return __nfs_revalidate_inode(server, inode);
1250 EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1252 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
1256 if (mapping->nrpages != 0) {
1257 if (S_ISREG(inode->i_mode)) {
1258 ret = nfs_sync_mapping(mapping);
1262 ret = invalidate_inode_pages2(mapping);
1266 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1267 nfs_fscache_wait_on_invalidate(inode);
1269 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1271 (unsigned long long)NFS_FILEID(inode));
1276 * nfs_clear_invalid_mapping - Conditionally clear a mapping
1277 * @mapping: pointer to mapping
1279 * If the NFS_INO_INVALID_DATA inode flag is set, clear the mapping.
1281 int nfs_clear_invalid_mapping(struct address_space *mapping)
1283 struct inode *inode = mapping->host;
1284 struct nfs_inode *nfsi = NFS_I(inode);
1285 unsigned long *bitlock = &nfsi->flags;
1289 * We must clear NFS_INO_INVALID_DATA first to ensure that
1290 * invalidations that come in while we're shooting down the mappings
1291 * are respected. But, that leaves a race window where one revalidator
1292 * can clear the flag, and then another checks it before the mapping
1293 * gets invalidated. Fix that by serializing access to this part of
1296 * At the same time, we need to allow other tasks to see whether we
1297 * might be in the middle of invalidating the pages, so we only set
1298 * the bit lock here if it looks like we're going to be doing that.
1301 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1302 nfs_wait_bit_killable, TASK_KILLABLE);
1305 spin_lock(&inode->i_lock);
1306 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1307 spin_unlock(&inode->i_lock);
1310 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1312 spin_unlock(&inode->i_lock);
1316 set_bit(NFS_INO_INVALIDATING, bitlock);
1318 nfsi->cache_validity &=
1319 ~(NFS_INO_INVALID_DATA | NFS_INO_DATA_INVAL_DEFER);
1320 spin_unlock(&inode->i_lock);
1321 trace_nfs_invalidate_mapping_enter(inode);
1322 ret = nfs_invalidate_mapping(inode, mapping);
1323 trace_nfs_invalidate_mapping_exit(inode, ret);
1325 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
1326 smp_mb__after_atomic();
1327 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
1332 bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1334 return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
1338 int nfs_revalidate_mapping_rcu(struct inode *inode)
1340 struct nfs_inode *nfsi = NFS_I(inode);
1341 unsigned long *bitlock = &nfsi->flags;
1344 if (IS_SWAPFILE(inode))
1346 if (nfs_mapping_need_revalidate_inode(inode)) {
1350 spin_lock(&inode->i_lock);
1351 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1352 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1354 spin_unlock(&inode->i_lock);
1360 * nfs_revalidate_mapping - Revalidate the pagecache
1361 * @inode: pointer to host inode
1362 * @mapping: pointer to mapping
1364 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
1366 /* swapfiles are not supposed to be shared. */
1367 if (IS_SWAPFILE(inode))
1370 if (nfs_mapping_need_revalidate_inode(inode)) {
1371 int ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1376 return nfs_clear_invalid_mapping(mapping);
1379 static bool nfs_file_has_writers(struct nfs_inode *nfsi)
1381 struct inode *inode = &nfsi->vfs_inode;
1383 if (!S_ISREG(inode->i_mode))
1385 if (list_empty(&nfsi->open_files))
1387 return inode_is_open_for_write(inode);
1390 static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
1392 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
1395 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1397 struct timespec64 ts;
1399 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1400 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1401 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1402 inode_set_iversion_raw(inode, fattr->change_attr);
1403 if (S_ISDIR(inode->i_mode))
1404 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1405 else if (nfs_server_capable(inode, NFS_CAP_XATTR))
1406 nfs_set_cache_invalid(inode, NFS_INO_INVALID_XATTR);
1408 /* If we have atomic WCC data, we may update some attributes */
1409 ts = inode->i_ctime;
1410 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1411 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
1412 && timespec64_equal(&ts, &fattr->pre_ctime)) {
1413 inode->i_ctime = fattr->ctime;
1416 ts = inode->i_mtime;
1417 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1418 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
1419 && timespec64_equal(&ts, &fattr->pre_mtime)) {
1420 inode->i_mtime = fattr->mtime;
1421 if (S_ISDIR(inode->i_mode))
1422 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1424 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1425 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1426 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
1427 && !nfs_have_writebacks(inode)) {
1428 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
1433 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1434 * @inode: pointer to inode
1435 * @fattr: updated attributes
1437 * Verifies the attribute cache. If we have just changed the attributes,
1438 * so that fattr carries weak cache consistency data, then it may
1439 * also update the ctime/mtime/change_attribute.
1441 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1443 struct nfs_inode *nfsi = NFS_I(inode);
1444 loff_t cur_size, new_isize;
1445 unsigned long invalid = 0;
1446 struct timespec64 ts;
1448 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
1451 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1452 /* Only a mounted-on-fileid? Just exit */
1453 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1455 /* Has the inode gone and changed behind our back? */
1456 } else if (nfsi->fileid != fattr->fileid) {
1457 /* Is this perhaps the mounted-on fileid? */
1458 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1459 nfsi->fileid == fattr->mounted_on_fileid)
1463 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1467 if (!nfs_file_has_buffered_writers(nfsi)) {
1468 /* Verify a few of the more important attributes */
1469 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
1470 invalid |= NFS_INO_INVALID_CHANGE
1471 | NFS_INO_REVAL_PAGECACHE;
1473 ts = inode->i_mtime;
1474 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec64_equal(&ts, &fattr->mtime))
1475 invalid |= NFS_INO_INVALID_MTIME;
1477 ts = inode->i_ctime;
1478 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec64_equal(&ts, &fattr->ctime))
1479 invalid |= NFS_INO_INVALID_CTIME;
1481 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1482 cur_size = i_size_read(inode);
1483 new_isize = nfs_size_to_loff_t(fattr->size);
1484 if (cur_size != new_isize)
1485 invalid |= NFS_INO_INVALID_SIZE
1486 | NFS_INO_REVAL_PAGECACHE;
1490 /* Have any file permissions changed? */
1491 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
1492 invalid |= NFS_INO_INVALID_ACCESS
1493 | NFS_INO_INVALID_ACL
1494 | NFS_INO_INVALID_OTHER;
1495 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
1496 invalid |= NFS_INO_INVALID_ACCESS
1497 | NFS_INO_INVALID_ACL
1498 | NFS_INO_INVALID_OTHER;
1499 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
1500 invalid |= NFS_INO_INVALID_ACCESS
1501 | NFS_INO_INVALID_ACL
1502 | NFS_INO_INVALID_OTHER;
1504 /* Has the link count changed? */
1505 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
1506 invalid |= NFS_INO_INVALID_OTHER;
1508 ts = inode->i_atime;
1509 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec64_equal(&ts, &fattr->atime))
1510 invalid |= NFS_INO_INVALID_ATIME;
1513 nfs_set_cache_invalid(inode, invalid);
1515 nfsi->read_cache_jiffies = fattr->time_start;
1519 static atomic_long_t nfs_attr_generation_counter;
1521 static unsigned long nfs_read_attr_generation_counter(void)
1523 return atomic_long_read(&nfs_attr_generation_counter);
1526 unsigned long nfs_inc_attr_generation_counter(void)
1528 return atomic_long_inc_return(&nfs_attr_generation_counter);
1530 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
1532 void nfs_fattr_init(struct nfs_fattr *fattr)
1535 fattr->time_start = jiffies;
1536 fattr->gencount = nfs_inc_attr_generation_counter();
1537 fattr->owner_name = NULL;
1538 fattr->group_name = NULL;
1540 EXPORT_SYMBOL_GPL(nfs_fattr_init);
1543 * nfs_fattr_set_barrier
1544 * @fattr: attributes
1546 * Used to set a barrier after an attribute was updated. This
1547 * barrier ensures that older attributes from RPC calls that may
1548 * have raced with our update cannot clobber these new values.
1549 * Note that you are still responsible for ensuring that other
1550 * operations which change the attribute on the server do not
1553 void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1555 fattr->gencount = nfs_inc_attr_generation_counter();
1558 struct nfs_fattr *nfs_alloc_fattr(void)
1560 struct nfs_fattr *fattr;
1562 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1564 nfs_fattr_init(fattr);
1567 EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
1569 struct nfs_fh *nfs_alloc_fhandle(void)
1573 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1578 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
1582 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1583 * in the same way that wireshark does
1587 * For debugging only.
1589 u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1591 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1592 * not on the result */
1593 return nfs_fhandle_hash(fh);
1595 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
1598 * _nfs_display_fhandle - display an NFS file handle on the console
1600 * @fh: file handle to display
1601 * @caption: display caption
1603 * For debugging only.
1605 void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1609 if (fh == NULL || fh->size == 0) {
1610 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1614 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1615 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
1616 for (i = 0; i < fh->size; i += 16) {
1617 __be32 *pos = (__be32 *)&fh->data[i];
1619 switch ((fh->size - i - 1) >> 2) {
1621 printk(KERN_DEFAULT " %08x\n",
1625 printk(KERN_DEFAULT " %08x %08x\n",
1626 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1629 printk(KERN_DEFAULT " %08x %08x %08x\n",
1630 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1631 be32_to_cpup(pos + 2));
1634 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1635 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1636 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1640 EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
1644 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1645 * @inode: pointer to inode
1646 * @fattr: attributes
1648 * Attempt to divine whether or not an RPC call reply carrying stale
1649 * attributes got scheduled after another call carrying updated ones.
1651 * To do so, the function first assumes that a more recent ctime means
1652 * that the attributes in fattr are newer, however it also attempt to
1653 * catch the case where ctime either didn't change, or went backwards
1654 * (if someone reset the clock on the server) by looking at whether
1655 * or not this RPC call was started after the inode was last updated.
1656 * Note also the check for wraparound of 'attr_gencount'
1658 * The function returns 'true' if it thinks the attributes in 'fattr' are
1659 * more recent than the ones cached in the inode.
1662 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1664 const struct nfs_inode *nfsi = NFS_I(inode);
1666 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1667 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1670 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1674 trace_nfs_refresh_inode_enter(inode);
1676 if (nfs_inode_attrs_need_update(inode, fattr))
1677 ret = nfs_update_inode(inode, fattr);
1679 ret = nfs_check_inode_attributes(inode, fattr);
1681 trace_nfs_refresh_inode_exit(inode, ret);
1686 * nfs_refresh_inode - try to update the inode attribute cache
1687 * @inode: pointer to inode
1688 * @fattr: updated attributes
1690 * Check that an RPC call that returned attributes has not overlapped with
1691 * other recent updates of the inode metadata, then decide whether it is
1692 * safe to do a full update of the inode attributes, or whether just to
1693 * call nfs_check_inode_attributes.
1695 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1699 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1701 spin_lock(&inode->i_lock);
1702 status = nfs_refresh_inode_locked(inode, fattr);
1703 spin_unlock(&inode->i_lock);
1707 EXPORT_SYMBOL_GPL(nfs_refresh_inode);
1709 static int nfs_post_op_update_inode_locked(struct inode *inode,
1710 struct nfs_fattr *fattr, unsigned int invalid)
1712 if (S_ISDIR(inode->i_mode))
1713 invalid |= NFS_INO_INVALID_DATA;
1714 nfs_set_cache_invalid(inode, invalid);
1715 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1717 return nfs_refresh_inode_locked(inode, fattr);
1721 * nfs_post_op_update_inode - try to update the inode attribute cache
1722 * @inode: pointer to inode
1723 * @fattr: updated attributes
1725 * After an operation that has changed the inode metadata, mark the
1726 * attribute cache as being invalid, then try to update it.
1728 * NB: if the server didn't return any post op attributes, this
1729 * function will force the retrieval of attributes before the next
1730 * NFS request. Thus it should be used only for operations that
1731 * are expected to change one or more attributes, to avoid
1732 * unnecessary NFS requests and trips through nfs_update_inode().
1734 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1738 spin_lock(&inode->i_lock);
1739 nfs_fattr_set_barrier(fattr);
1740 status = nfs_post_op_update_inode_locked(inode, fattr,
1741 NFS_INO_INVALID_CHANGE
1742 | NFS_INO_INVALID_CTIME
1743 | NFS_INO_REVAL_FORCED);
1744 spin_unlock(&inode->i_lock);
1748 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
1751 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1752 * @inode: pointer to inode
1753 * @fattr: updated attributes
1755 * After an operation that has changed the inode metadata, mark the
1756 * attribute cache as being invalid, then try to update it. Fake up
1757 * weak cache consistency data, if none exist.
1759 * This function is mainly designed to be used by the ->write_done() functions.
1761 int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
1765 /* Don't do a WCC update if these attributes are already stale */
1766 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1767 !nfs_inode_attrs_need_update(inode, fattr)) {
1768 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1769 | NFS_ATTR_FATTR_PRESIZE
1770 | NFS_ATTR_FATTR_PREMTIME
1771 | NFS_ATTR_FATTR_PRECTIME);
1774 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1775 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1776 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
1777 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1779 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1780 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1781 fattr->pre_ctime = inode->i_ctime;
1782 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1784 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1785 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1786 fattr->pre_mtime = inode->i_mtime;
1787 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1789 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1790 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1791 fattr->pre_size = i_size_read(inode);
1792 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1795 status = nfs_post_op_update_inode_locked(inode, fattr,
1796 NFS_INO_INVALID_CHANGE
1797 | NFS_INO_INVALID_CTIME
1798 | NFS_INO_INVALID_MTIME
1799 | NFS_INO_INVALID_BLOCKS);
1804 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1805 * @inode: pointer to inode
1806 * @fattr: updated attributes
1808 * After an operation that has changed the inode metadata, mark the
1809 * attribute cache as being invalid, then try to update it. Fake up
1810 * weak cache consistency data, if none exist.
1812 * This function is mainly designed to be used by the ->write_done() functions.
1814 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1818 spin_lock(&inode->i_lock);
1819 nfs_fattr_set_barrier(fattr);
1820 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
1821 spin_unlock(&inode->i_lock);
1824 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
1828 * Many nfs protocol calls return the new file attributes after
1829 * an operation. Here we update the inode to reflect the state
1830 * of the server's inode.
1832 * This is a bit tricky because we have to make sure all dirty pages
1833 * have been sent off to the server before calling invalidate_inode_pages.
1834 * To make sure no other process adds more write requests while we try
1835 * our best to flush them, we make them sleep during the attribute refresh.
1837 * A very similar scenario holds for the dir cache.
1839 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1841 struct nfs_server *server;
1842 struct nfs_inode *nfsi = NFS_I(inode);
1843 loff_t cur_isize, new_isize;
1844 unsigned long invalid = 0;
1845 unsigned long now = jiffies;
1846 unsigned long save_cache_validity;
1847 bool have_writers = nfs_file_has_buffered_writers(nfsi);
1848 bool cache_revalidated = true;
1849 bool attr_changed = false;
1850 bool have_delegation;
1852 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1853 __func__, inode->i_sb->s_id, inode->i_ino,
1854 nfs_display_fhandle_hash(NFS_FH(inode)),
1855 atomic_read(&inode->i_count), fattr->valid);
1857 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID)) {
1858 /* Only a mounted-on-fileid? Just exit */
1859 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1861 /* Has the inode gone and changed behind our back? */
1862 } else if (nfsi->fileid != fattr->fileid) {
1863 /* Is this perhaps the mounted-on fileid? */
1864 if ((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) &&
1865 nfsi->fileid == fattr->mounted_on_fileid)
1867 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1868 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1869 NFS_SERVER(inode)->nfs_client->cl_hostname,
1870 inode->i_sb->s_id, (long long)nfsi->fileid,
1871 (long long)fattr->fileid);
1876 * Make sure the inode's type hasn't changed.
1878 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1880 * Big trouble! The inode has become a different object.
1882 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
1883 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1887 server = NFS_SERVER(inode);
1888 /* Update the fsid? */
1889 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1890 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1891 !IS_AUTOMOUNT(inode))
1892 server->fsid = fattr->fsid;
1894 /* Save the delegation state before clearing cache_validity */
1895 have_delegation = nfs_have_delegated_attributes(inode);
1898 * Update the read time so we don't revalidate too often.
1900 nfsi->read_cache_jiffies = fattr->time_start;
1902 save_cache_validity = nfsi->cache_validity;
1903 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1904 | NFS_INO_INVALID_ATIME
1905 | NFS_INO_REVAL_FORCED
1906 | NFS_INO_REVAL_PAGECACHE
1907 | NFS_INO_INVALID_BLOCKS);
1909 /* Do atomic weak cache consistency updates */
1910 nfs_wcc_update_inode(inode, fattr);
1912 if (pnfs_layoutcommit_outstanding(inode)) {
1913 nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR;
1914 cache_revalidated = false;
1917 /* More cache consistency checks */
1918 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1919 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
1920 /* Could it be a race with writeback? */
1921 if (!(have_writers || have_delegation)) {
1922 invalid |= NFS_INO_INVALID_DATA
1923 | NFS_INO_INVALID_ACCESS
1924 | NFS_INO_INVALID_ACL
1925 | NFS_INO_INVALID_XATTR;
1926 /* Force revalidate of all attributes */
1927 save_cache_validity |= NFS_INO_INVALID_CTIME
1928 | NFS_INO_INVALID_MTIME
1929 | NFS_INO_INVALID_SIZE
1930 | NFS_INO_INVALID_OTHER;
1931 if (S_ISDIR(inode->i_mode))
1932 nfs_force_lookup_revalidate(inode);
1933 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1936 } else if (!have_delegation)
1937 nfsi->cache_validity |= NFS_INO_DATA_INVAL_DEFER;
1938 inode_set_iversion_raw(inode, fattr->change_attr);
1939 attr_changed = true;
1942 nfsi->cache_validity |= save_cache_validity &
1943 (NFS_INO_INVALID_CHANGE
1944 | NFS_INO_REVAL_PAGECACHE
1945 | NFS_INO_REVAL_FORCED);
1946 cache_revalidated = false;
1949 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1950 inode->i_mtime = fattr->mtime;
1951 } else if (server->caps & NFS_CAP_MTIME) {
1952 nfsi->cache_validity |= save_cache_validity &
1953 (NFS_INO_INVALID_MTIME
1954 | NFS_INO_REVAL_FORCED);
1955 cache_revalidated = false;
1958 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1959 inode->i_ctime = fattr->ctime;
1960 } else if (server->caps & NFS_CAP_CTIME) {
1961 nfsi->cache_validity |= save_cache_validity &
1962 (NFS_INO_INVALID_CTIME
1963 | NFS_INO_REVAL_FORCED);
1964 cache_revalidated = false;
1967 /* Check if our cached file size is stale */
1968 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1969 new_isize = nfs_size_to_loff_t(fattr->size);
1970 cur_isize = i_size_read(inode);
1971 if (new_isize != cur_isize && !have_delegation) {
1972 /* Do we perhaps have any outstanding writes, or has
1973 * the file grown beyond our last write? */
1974 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
1975 i_size_write(inode, new_isize);
1977 invalid |= NFS_INO_INVALID_DATA;
1978 attr_changed = true;
1980 dprintk("NFS: isize change on server for file %s/%ld "
1984 (long long)cur_isize,
1985 (long long)new_isize);
1988 nfsi->cache_validity |= save_cache_validity &
1989 (NFS_INO_INVALID_SIZE
1990 | NFS_INO_REVAL_PAGECACHE
1991 | NFS_INO_REVAL_FORCED);
1992 cache_revalidated = false;
1996 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1997 inode->i_atime = fattr->atime;
1998 else if (server->caps & NFS_CAP_ATIME) {
1999 nfsi->cache_validity |= save_cache_validity &
2000 (NFS_INO_INVALID_ATIME
2001 | NFS_INO_REVAL_FORCED);
2002 cache_revalidated = false;
2005 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
2006 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
2007 umode_t newmode = inode->i_mode & S_IFMT;
2008 newmode |= fattr->mode & S_IALLUGO;
2009 inode->i_mode = newmode;
2010 invalid |= NFS_INO_INVALID_ACCESS
2011 | NFS_INO_INVALID_ACL;
2012 attr_changed = true;
2014 } else if (server->caps & NFS_CAP_MODE) {
2015 nfsi->cache_validity |= save_cache_validity &
2016 (NFS_INO_INVALID_OTHER
2017 | NFS_INO_REVAL_FORCED);
2018 cache_revalidated = false;
2021 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
2022 if (!uid_eq(inode->i_uid, fattr->uid)) {
2023 invalid |= NFS_INO_INVALID_ACCESS
2024 | NFS_INO_INVALID_ACL;
2025 inode->i_uid = fattr->uid;
2026 attr_changed = true;
2028 } else if (server->caps & NFS_CAP_OWNER) {
2029 nfsi->cache_validity |= save_cache_validity &
2030 (NFS_INO_INVALID_OTHER
2031 | NFS_INO_REVAL_FORCED);
2032 cache_revalidated = false;
2035 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
2036 if (!gid_eq(inode->i_gid, fattr->gid)) {
2037 invalid |= NFS_INO_INVALID_ACCESS
2038 | NFS_INO_INVALID_ACL;
2039 inode->i_gid = fattr->gid;
2040 attr_changed = true;
2042 } else if (server->caps & NFS_CAP_OWNER_GROUP) {
2043 nfsi->cache_validity |= save_cache_validity &
2044 (NFS_INO_INVALID_OTHER
2045 | NFS_INO_REVAL_FORCED);
2046 cache_revalidated = false;
2049 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
2050 if (inode->i_nlink != fattr->nlink) {
2051 if (S_ISDIR(inode->i_mode))
2052 invalid |= NFS_INO_INVALID_DATA;
2053 set_nlink(inode, fattr->nlink);
2054 attr_changed = true;
2056 } else if (server->caps & NFS_CAP_NLINK) {
2057 nfsi->cache_validity |= save_cache_validity &
2058 (NFS_INO_INVALID_OTHER
2059 | NFS_INO_REVAL_FORCED);
2060 cache_revalidated = false;
2063 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
2065 * report the blocks in 512byte units
2067 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
2068 } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
2069 inode->i_blocks = fattr->du.nfs2.blocks;
2071 nfsi->cache_validity |= save_cache_validity &
2072 (NFS_INO_INVALID_BLOCKS
2073 | NFS_INO_REVAL_FORCED);
2074 cache_revalidated = false;
2077 /* Update attrtimeo value if we're out of the unstable period */
2079 invalid &= ~NFS_INO_INVALID_ATTR;
2080 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
2081 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
2082 nfsi->attrtimeo_timestamp = now;
2083 /* Set barrier to be more recent than all outstanding updates */
2084 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
2086 if (cache_revalidated) {
2087 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
2088 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
2089 nfsi->attrtimeo <<= 1;
2090 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
2091 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
2093 nfsi->attrtimeo_timestamp = now;
2095 /* Set the barrier to be more recent than this fattr */
2096 if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0)
2097 nfsi->attr_gencount = fattr->gencount;
2100 /* Don't invalidate the data if we were to blame */
2101 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
2102 || S_ISLNK(inode->i_mode)))
2103 invalid &= ~NFS_INO_INVALID_DATA;
2104 nfs_set_cache_invalid(inode, invalid);
2109 * No need to worry about unhashing the dentry, as the
2110 * lookup validation will know that the inode is bad.
2111 * (But we fall through to invalidate the caches.)
2113 nfs_set_inode_stale_locked(inode);
2117 struct inode *nfs_alloc_inode(struct super_block *sb)
2119 struct nfs_inode *nfsi;
2120 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
2124 nfsi->cache_validity = 0UL;
2125 #if IS_ENABLED(CONFIG_NFS_V4)
2126 nfsi->nfs4_acl = NULL;
2127 #endif /* CONFIG_NFS_V4 */
2128 #ifdef CONFIG_NFS_V4_2
2129 nfsi->xattr_cache = NULL;
2131 return &nfsi->vfs_inode;
2133 EXPORT_SYMBOL_GPL(nfs_alloc_inode);
2135 void nfs_free_inode(struct inode *inode)
2137 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2139 EXPORT_SYMBOL_GPL(nfs_free_inode);
2141 static inline void nfs4_init_once(struct nfs_inode *nfsi)
2143 #if IS_ENABLED(CONFIG_NFS_V4)
2144 INIT_LIST_HEAD(&nfsi->open_states);
2145 nfsi->delegation = NULL;
2146 init_rwsem(&nfsi->rwsem);
2147 nfsi->layout = NULL;
2151 static void init_once(void *foo)
2153 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2155 inode_init_once(&nfsi->vfs_inode);
2156 INIT_LIST_HEAD(&nfsi->open_files);
2157 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2158 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
2159 INIT_LIST_HEAD(&nfsi->commit_info.list);
2160 atomic_long_set(&nfsi->nrequests, 0);
2161 atomic_long_set(&nfsi->commit_info.ncommit, 0);
2162 atomic_set(&nfsi->commit_info.rpcs_out, 0);
2163 init_rwsem(&nfsi->rmdir_sem);
2164 mutex_init(&nfsi->commit_mutex);
2165 nfs4_init_once(nfsi);
2166 nfsi->cache_change_attribute = 0;
2169 static int __init nfs_init_inodecache(void)
2171 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2172 sizeof(struct nfs_inode),
2173 0, (SLAB_RECLAIM_ACCOUNT|
2174 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
2176 if (nfs_inode_cachep == NULL)
2182 static void nfs_destroy_inodecache(void)
2185 * Make sure all delayed rcu free inodes are flushed before we
2189 kmem_cache_destroy(nfs_inode_cachep);
2192 struct workqueue_struct *nfsiod_workqueue;
2193 EXPORT_SYMBOL_GPL(nfsiod_workqueue);
2196 * start up the nfsiod workqueue
2198 static int nfsiod_start(void)
2200 struct workqueue_struct *wq;
2201 dprintk("RPC: creating workqueue nfsiod\n");
2202 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM | WQ_UNBOUND, 0);
2205 nfsiod_workqueue = wq;
2210 * Destroy the nfsiod workqueue
2212 static void nfsiod_stop(void)
2214 struct workqueue_struct *wq;
2216 wq = nfsiod_workqueue;
2219 nfsiod_workqueue = NULL;
2220 destroy_workqueue(wq);
2223 unsigned int nfs_net_id;
2224 EXPORT_SYMBOL_GPL(nfs_net_id);
2226 static int nfs_net_init(struct net *net)
2228 nfs_clients_init(net);
2229 return nfs_fs_proc_net_init(net);
2232 static void nfs_net_exit(struct net *net)
2234 nfs_fs_proc_net_exit(net);
2235 nfs_clients_exit(net);
2238 static struct pernet_operations nfs_net_ops = {
2239 .init = nfs_net_init,
2240 .exit = nfs_net_exit,
2242 .size = sizeof(struct nfs_net),
2248 static int __init init_nfs_fs(void)
2252 err = nfs_sysfs_init();
2256 err = register_pernet_subsys(&nfs_net_ops);
2260 err = nfs_fscache_register();
2264 err = nfsiod_start();
2268 err = nfs_fs_proc_init();
2272 err = nfs_init_nfspagecache();
2276 err = nfs_init_inodecache();
2280 err = nfs_init_readpagecache();
2284 err = nfs_init_writepagecache();
2288 err = nfs_init_directcache();
2292 rpc_proc_register(&init_net, &nfs_rpcstat);
2294 err = register_nfs_fs();
2300 rpc_proc_unregister(&init_net, "nfs");
2301 nfs_destroy_directcache();
2303 nfs_destroy_writepagecache();
2305 nfs_destroy_readpagecache();
2307 nfs_destroy_inodecache();
2309 nfs_destroy_nfspagecache();
2315 nfs_fscache_unregister();
2317 unregister_pernet_subsys(&nfs_net_ops);
2324 static void __exit exit_nfs_fs(void)
2326 nfs_destroy_directcache();
2327 nfs_destroy_writepagecache();
2328 nfs_destroy_readpagecache();
2329 nfs_destroy_inodecache();
2330 nfs_destroy_nfspagecache();
2331 nfs_fscache_unregister();
2332 unregister_pernet_subsys(&nfs_net_ops);
2333 rpc_proc_unregister(&init_net, "nfs");
2334 unregister_nfs_fs();
2340 /* Not quite true; I just maintain it */
2341 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2342 MODULE_LICENSE("GPL");
2343 module_param(enable_ino64, bool, 0644);
2345 module_init(init_nfs_fs)
2346 module_exit(exit_nfs_fs)