4 * Copyright (C) 1992 Rick Sladkey
6 * nfs inode and superblock handling functions
8 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/sched/signal.h>
19 #include <linux/time.h>
20 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/stat.h>
24 #include <linux/errno.h>
25 #include <linux/unistd.h>
26 #include <linux/sunrpc/clnt.h>
27 #include <linux/sunrpc/stats.h>
28 #include <linux/sunrpc/metrics.h>
29 #include <linux/nfs_fs.h>
30 #include <linux/nfs_mount.h>
31 #include <linux/nfs4_mount.h>
32 #include <linux/lockd/bind.h>
33 #include <linux/seq_file.h>
34 #include <linux/mount.h>
35 #include <linux/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/nfs_xdr.h>
38 #include <linux/slab.h>
39 #include <linux/compat.h>
40 #include <linux/freezer.h>
41 #include <linux/uaccess.h>
42 #include <linux/iversion.h>
46 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_VFS
58 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
60 /* Default is to see 64-bit inode numbers */
61 static bool enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
63 static void nfs_invalidate_inode(struct inode *);
64 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
66 static struct kmem_cache * nfs_inode_cachep;
68 static inline unsigned long
69 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
71 return nfs_fileid_to_ino_t(fattr->fileid);
74 static int nfs_wait_killable(int mode)
76 freezable_schedule_unsafe();
77 if (signal_pending_state(mode, current))
82 int nfs_wait_bit_killable(struct wait_bit_key *key, int mode)
84 return nfs_wait_killable(mode);
86 EXPORT_SYMBOL_GPL(nfs_wait_bit_killable);
89 * nfs_compat_user_ino64 - returns the user-visible inode number
90 * @fileid: 64-bit fileid
92 * This function returns a 32-bit inode number if the boot parameter
93 * nfs.enable_ino64 is zero.
95 u64 nfs_compat_user_ino64(u64 fileid)
106 if (sizeof(ino) < sizeof(fileid))
107 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
111 int nfs_drop_inode(struct inode *inode)
113 return NFS_STALE(inode) || generic_drop_inode(inode);
115 EXPORT_SYMBOL_GPL(nfs_drop_inode);
117 void nfs_clear_inode(struct inode *inode)
120 * The following should never happen...
122 WARN_ON_ONCE(nfs_have_writebacks(inode));
123 WARN_ON_ONCE(!list_empty(&NFS_I(inode)->open_files));
124 nfs_zap_acl_cache(inode);
125 nfs_access_zap_cache(inode);
126 nfs_fscache_clear_inode(inode);
128 EXPORT_SYMBOL_GPL(nfs_clear_inode);
130 void nfs_evict_inode(struct inode *inode)
132 truncate_inode_pages_final(&inode->i_data);
134 nfs_clear_inode(inode);
137 int nfs_sync_inode(struct inode *inode)
139 inode_dio_wait(inode);
140 return nfs_wb_all(inode);
142 EXPORT_SYMBOL_GPL(nfs_sync_inode);
145 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
147 int nfs_sync_mapping(struct address_space *mapping)
151 if (mapping->nrpages != 0) {
152 unmap_mapping_range(mapping, 0, 0, 0);
153 ret = nfs_wb_all(mapping->host);
158 static int nfs_attribute_timeout(struct inode *inode)
160 struct nfs_inode *nfsi = NFS_I(inode);
162 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
165 static bool nfs_check_cache_invalid_delegated(struct inode *inode, unsigned long flags)
167 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
169 /* Special case for the pagecache or access cache */
170 if (flags == NFS_INO_REVAL_PAGECACHE &&
171 !(cache_validity & NFS_INO_REVAL_FORCED))
173 return (cache_validity & flags) != 0;
176 static bool nfs_check_cache_invalid_not_delegated(struct inode *inode, unsigned long flags)
178 unsigned long cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
180 if ((cache_validity & flags) != 0)
182 if (nfs_attribute_timeout(inode))
187 bool nfs_check_cache_invalid(struct inode *inode, unsigned long flags)
189 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
190 return nfs_check_cache_invalid_delegated(inode, flags);
192 return nfs_check_cache_invalid_not_delegated(inode, flags);
195 static void nfs_set_cache_invalid(struct inode *inode, unsigned long flags)
197 struct nfs_inode *nfsi = NFS_I(inode);
198 bool have_delegation = nfs_have_delegated_attributes(inode);
201 flags &= ~(NFS_INO_INVALID_CHANGE|NFS_INO_REVAL_PAGECACHE);
202 if (inode->i_mapping->nrpages == 0)
203 flags &= ~NFS_INO_INVALID_DATA;
204 nfsi->cache_validity |= flags;
205 if (flags & NFS_INO_INVALID_DATA)
206 nfs_fscache_invalidate(inode);
210 * Invalidate the local caches
212 static void nfs_zap_caches_locked(struct inode *inode)
214 struct nfs_inode *nfsi = NFS_I(inode);
215 int mode = inode->i_mode;
217 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
219 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
220 nfsi->attrtimeo_timestamp = jiffies;
222 memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf));
223 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) {
224 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
225 | NFS_INO_INVALID_DATA
226 | NFS_INO_INVALID_ACCESS
227 | NFS_INO_INVALID_ACL
228 | NFS_INO_REVAL_PAGECACHE);
230 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATTR
231 | NFS_INO_INVALID_ACCESS
232 | NFS_INO_INVALID_ACL
233 | NFS_INO_REVAL_PAGECACHE);
234 nfs_zap_label_cache_locked(nfsi);
237 void nfs_zap_caches(struct inode *inode)
239 spin_lock(&inode->i_lock);
240 nfs_zap_caches_locked(inode);
241 spin_unlock(&inode->i_lock);
244 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
246 if (mapping->nrpages != 0) {
247 spin_lock(&inode->i_lock);
248 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
249 spin_unlock(&inode->i_lock);
253 void nfs_zap_acl_cache(struct inode *inode)
255 void (*clear_acl_cache)(struct inode *);
257 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
258 if (clear_acl_cache != NULL)
259 clear_acl_cache(inode);
260 spin_lock(&inode->i_lock);
261 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
262 spin_unlock(&inode->i_lock);
264 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache);
266 void nfs_invalidate_atime(struct inode *inode)
268 spin_lock(&inode->i_lock);
269 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
270 spin_unlock(&inode->i_lock);
272 EXPORT_SYMBOL_GPL(nfs_invalidate_atime);
275 * Invalidate, but do not unhash, the inode.
276 * NB: must be called with inode->i_lock held!
278 static void nfs_invalidate_inode(struct inode *inode)
280 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
281 nfs_zap_caches_locked(inode);
284 struct nfs_find_desc {
286 struct nfs_fattr *fattr;
290 * In NFSv3 we can have 64bit inode numbers. In order to support
291 * this, and re-exported directories (also seen in NFSv2)
292 * we are forced to allow 2 different inodes to have the same
296 nfs_find_actor(struct inode *inode, void *opaque)
298 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
299 struct nfs_fh *fh = desc->fh;
300 struct nfs_fattr *fattr = desc->fattr;
302 if (NFS_FILEID(inode) != fattr->fileid)
304 if ((S_IFMT & inode->i_mode) != (S_IFMT & fattr->mode))
306 if (nfs_compare_fh(NFS_FH(inode), fh))
308 if (is_bad_inode(inode) || NFS_STALE(inode))
314 nfs_init_locked(struct inode *inode, void *opaque)
316 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
317 struct nfs_fattr *fattr = desc->fattr;
319 set_nfs_fileid(inode, fattr->fileid);
320 inode->i_mode = fattr->mode;
321 nfs_copy_fh(NFS_FH(inode), desc->fh);
325 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
326 static void nfs_clear_label_invalid(struct inode *inode)
328 spin_lock(&inode->i_lock);
329 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_LABEL;
330 spin_unlock(&inode->i_lock);
333 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
334 struct nfs4_label *label)
341 if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) {
342 error = security_inode_notifysecctx(inode, label->label,
345 printk(KERN_ERR "%s() %s %d "
346 "security_inode_notifysecctx() %d\n",
348 (char *)label->label,
350 nfs_clear_label_invalid(inode);
354 struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags)
356 struct nfs4_label *label = NULL;
357 int minor_version = server->nfs_client->cl_minorversion;
359 if (minor_version < 2)
362 if (!(server->caps & NFS_CAP_SECURITY_LABEL))
365 label = kzalloc(sizeof(struct nfs4_label), flags);
367 return ERR_PTR(-ENOMEM);
369 label->label = kzalloc(NFS4_MAXLABELLEN, flags);
370 if (label->label == NULL) {
372 return ERR_PTR(-ENOMEM);
374 label->len = NFS4_MAXLABELLEN;
378 EXPORT_SYMBOL_GPL(nfs4_label_alloc);
380 void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr,
381 struct nfs4_label *label)
385 EXPORT_SYMBOL_GPL(nfs_setsecurity);
387 /* Search for inode identified by fh, fileid and i_mode in inode cache. */
389 nfs_ilookup(struct super_block *sb, struct nfs_fattr *fattr, struct nfs_fh *fh)
391 struct nfs_find_desc desc = {
398 if (!(fattr->valid & NFS_ATTR_FATTR_FILEID) ||
399 !(fattr->valid & NFS_ATTR_FATTR_TYPE))
402 hash = nfs_fattr_to_ino_t(fattr);
403 inode = ilookup5(sb, hash, nfs_find_actor, &desc);
405 dprintk("%s: returning %p\n", __func__, inode);
410 * This is our front-end to iget that looks up inodes by file handle
411 * instead of inode number.
414 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, struct nfs4_label *label)
416 struct nfs_find_desc desc = {
420 struct inode *inode = ERR_PTR(-ENOENT);
423 nfs_attr_check_mountpoint(sb, fattr);
425 if (nfs_attr_use_mounted_on_fileid(fattr))
426 fattr->fileid = fattr->mounted_on_fileid;
427 else if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
429 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
432 hash = nfs_fattr_to_ino_t(fattr);
434 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
436 inode = ERR_PTR(-ENOMEM);
440 if (inode->i_state & I_NEW) {
441 struct nfs_inode *nfsi = NFS_I(inode);
442 unsigned long now = jiffies;
444 /* We set i_ino for the few things that still rely on it,
448 /* We can't support update_atime(), since the server will reset it */
449 inode->i_flags |= S_NOATIME|S_NOCMTIME;
450 inode->i_mode = fattr->mode;
451 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
452 && nfs_server_capable(inode, NFS_CAP_MODE))
453 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
454 /* Why so? Because we want revalidate for devices/FIFOs, and
455 * that's precisely what we have in nfs_file_inode_operations.
457 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
458 if (S_ISREG(inode->i_mode)) {
459 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
460 inode->i_data.a_ops = &nfs_file_aops;
461 } else if (S_ISDIR(inode->i_mode)) {
462 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
463 inode->i_fop = &nfs_dir_operations;
464 inode->i_data.a_ops = &nfs_dir_aops;
465 /* Deal with crossing mountpoints */
466 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
467 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
468 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
469 inode->i_op = &nfs_referral_inode_operations;
471 inode->i_op = &nfs_mountpoint_inode_operations;
473 inode->i_flags |= S_AUTOMOUNT;
475 } else if (S_ISLNK(inode->i_mode)) {
476 inode->i_op = &nfs_symlink_inode_operations;
477 inode_nohighmem(inode);
479 init_special_inode(inode, inode->i_mode, fattr->rdev);
481 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
482 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
483 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
484 inode_set_iversion_raw(inode, 0);
487 inode->i_uid = make_kuid(&init_user_ns, -2);
488 inode->i_gid = make_kgid(&init_user_ns, -2);
490 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
494 nfsi->read_cache_jiffies = fattr->time_start;
495 nfsi->attr_gencount = fattr->gencount;
496 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
497 inode->i_atime = timespec_to_timespec64(fattr->atime);
498 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
499 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ATIME);
500 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
501 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
502 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
503 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
504 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
505 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
506 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
507 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CTIME);
508 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
509 inode_set_iversion_raw(inode, fattr->change_attr);
511 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE);
512 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
513 inode->i_size = nfs_size_to_loff_t(fattr->size);
515 nfs_set_cache_invalid(inode, NFS_INO_INVALID_SIZE);
516 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
517 set_nlink(inode, fattr->nlink);
518 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
519 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
520 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
521 inode->i_uid = fattr->uid;
522 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
523 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
524 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
525 inode->i_gid = fattr->gid;
526 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
527 nfs_set_cache_invalid(inode, NFS_INO_INVALID_OTHER);
528 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
529 inode->i_blocks = fattr->du.nfs2.blocks;
530 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
532 * report the blocks in 512byte units
534 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
537 nfs_setsecurity(inode, fattr, label);
539 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
540 nfsi->attrtimeo_timestamp = now;
541 nfsi->access_cache = RB_ROOT;
543 nfs_fscache_init_inode(inode);
545 unlock_new_inode(inode);
547 int err = nfs_refresh_inode(inode, fattr);
550 inode = ERR_PTR(err);
554 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
556 (unsigned long long)NFS_FILEID(inode),
557 nfs_display_fhandle_hash(fh),
558 atomic_read(&inode->i_count));
564 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
567 EXPORT_SYMBOL_GPL(nfs_fhget);
569 #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)
572 nfs_setattr(struct dentry *dentry, struct iattr *attr)
574 struct inode *inode = d_inode(dentry);
575 struct nfs_fattr *fattr;
578 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
580 /* skip mode change if it's just for clearing setuid/setgid */
581 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
582 attr->ia_valid &= ~ATTR_MODE;
584 if (attr->ia_valid & ATTR_SIZE) {
585 BUG_ON(!S_ISREG(inode->i_mode));
587 error = inode_newsize_ok(inode, attr->ia_size);
591 if (attr->ia_size == i_size_read(inode))
592 attr->ia_valid &= ~ATTR_SIZE;
595 /* Optimization: if the end result is no change, don't RPC */
596 attr->ia_valid &= NFS_VALID_ATTRS;
597 if ((attr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
600 trace_nfs_setattr_enter(inode);
602 /* Write all dirty data */
603 if (S_ISREG(inode->i_mode))
604 nfs_sync_inode(inode);
606 fattr = nfs_alloc_fattr();
612 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
614 error = nfs_refresh_inode(inode, fattr);
615 nfs_free_fattr(fattr);
617 trace_nfs_setattr_exit(inode, error);
620 EXPORT_SYMBOL_GPL(nfs_setattr);
623 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
624 * @inode: inode of the file used
625 * @offset: file offset to start truncating
627 * This is a copy of the common vmtruncate, but with the locking
628 * corrected to take into account the fact that NFS requires
629 * inode->i_size to be updated under the inode->i_lock.
630 * Note: must be called with inode->i_lock held!
632 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
636 err = inode_newsize_ok(inode, offset);
640 i_size_write(inode, offset);
643 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_DATA;
644 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_SIZE;
646 spin_unlock(&inode->i_lock);
647 truncate_pagecache(inode, offset);
648 spin_lock(&inode->i_lock);
654 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
655 * @inode: pointer to struct inode
656 * @attr: pointer to struct iattr
657 * @fattr: pointer to struct nfs_fattr
659 * Note: we do this in the *proc.c in order to ensure that
660 * it works for things like exclusive creates too.
662 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr,
663 struct nfs_fattr *fattr)
665 /* Barrier: bump the attribute generation count. */
666 nfs_fattr_set_barrier(fattr);
668 spin_lock(&inode->i_lock);
669 NFS_I(inode)->attr_gencount = fattr->gencount;
670 nfs_set_cache_invalid(inode, NFS_INO_INVALID_CHANGE
671 | NFS_INO_INVALID_CTIME);
672 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
673 if ((attr->ia_valid & ATTR_MODE) != 0) {
674 int mode = attr->ia_mode & S_IALLUGO;
675 mode |= inode->i_mode & ~S_IALLUGO;
676 inode->i_mode = mode;
678 if ((attr->ia_valid & ATTR_UID) != 0)
679 inode->i_uid = attr->ia_uid;
680 if ((attr->ia_valid & ATTR_GID) != 0)
681 inode->i_gid = attr->ia_gid;
682 nfs_set_cache_invalid(inode, NFS_INO_INVALID_ACCESS
683 | NFS_INO_INVALID_ACL);
685 if ((attr->ia_valid & ATTR_SIZE) != 0) {
686 nfs_set_cache_invalid(inode, NFS_INO_INVALID_MTIME);
687 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
688 nfs_vmtruncate(inode, attr->ia_size);
691 nfs_update_inode(inode, fattr);
692 spin_unlock(&inode->i_lock);
694 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode);
696 static void nfs_readdirplus_parent_cache_miss(struct dentry *dentry)
698 struct dentry *parent;
700 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
702 parent = dget_parent(dentry);
703 nfs_force_use_readdirplus(d_inode(parent));
707 static void nfs_readdirplus_parent_cache_hit(struct dentry *dentry)
709 struct dentry *parent;
711 if (!nfs_server_capable(d_inode(dentry), NFS_CAP_READDIRPLUS))
713 parent = dget_parent(dentry);
714 nfs_advise_use_readdirplus(d_inode(parent));
718 static bool nfs_need_revalidate_inode(struct inode *inode)
720 if (NFS_I(inode)->cache_validity &
721 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL))
723 if (nfs_attribute_cache_expired(inode))
728 int nfs_getattr(const struct path *path, struct kstat *stat,
729 u32 request_mask, unsigned int query_flags)
731 struct inode *inode = d_inode(path->dentry);
732 struct nfs_server *server = NFS_SERVER(inode);
733 unsigned long cache_validity;
735 bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
736 bool do_update = false;
738 trace_nfs_getattr_enter(inode);
740 if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync)
743 /* Flush out writes to the server in order to update c/mtime. */
744 if ((request_mask & (STATX_CTIME|STATX_MTIME)) &&
745 S_ISREG(inode->i_mode)) {
746 err = filemap_write_and_wait(inode->i_mapping);
752 * We may force a getattr if the user cares about atime.
754 * Note that we only have to check the vfsmount flags here:
755 * - NFS always sets S_NOATIME by so checking it would give a
757 * - NFS never sets SB_NOATIME or SB_NODIRATIME so there is
758 * no point in checking those.
760 if ((path->mnt->mnt_flags & MNT_NOATIME) ||
761 ((path->mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
762 request_mask &= ~STATX_ATIME;
764 /* Is the user requesting attributes that might need revalidation? */
765 if (!(request_mask & (STATX_MODE|STATX_NLINK|STATX_ATIME|STATX_CTIME|
766 STATX_MTIME|STATX_UID|STATX_GID|
767 STATX_SIZE|STATX_BLOCKS)))
768 goto out_no_revalidate;
770 /* Check whether the cached attributes are stale */
771 do_update |= force_sync || nfs_attribute_cache_expired(inode);
772 cache_validity = READ_ONCE(NFS_I(inode)->cache_validity);
773 do_update |= cache_validity &
774 (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL);
775 if (request_mask & STATX_ATIME)
776 do_update |= cache_validity & NFS_INO_INVALID_ATIME;
777 if (request_mask & (STATX_CTIME|STATX_MTIME))
778 do_update |= cache_validity & NFS_INO_REVAL_PAGECACHE;
780 /* Update the attribute cache */
781 if (!(server->flags & NFS_MOUNT_NOAC))
782 nfs_readdirplus_parent_cache_miss(path->dentry);
784 nfs_readdirplus_parent_cache_hit(path->dentry);
785 err = __nfs_revalidate_inode(server, inode);
789 nfs_readdirplus_parent_cache_hit(path->dentry);
791 /* Only return attributes that were revalidated. */
792 stat->result_mask &= request_mask;
794 generic_fillattr(inode, stat);
795 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
796 if (S_ISDIR(inode->i_mode))
797 stat->blksize = NFS_SERVER(inode)->dtsize;
799 trace_nfs_getattr_exit(inode, err);
802 EXPORT_SYMBOL_GPL(nfs_getattr);
804 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
806 refcount_set(&l_ctx->count, 1);
807 l_ctx->lockowner = current->files;
808 INIT_LIST_HEAD(&l_ctx->list);
809 atomic_set(&l_ctx->io_count, 0);
812 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
814 struct nfs_lock_context *head = &ctx->lock_context;
815 struct nfs_lock_context *pos = head;
818 if (pos->lockowner != current->files)
820 refcount_inc(&pos->count);
822 } while ((pos = list_entry(pos->list.next, typeof(*pos), list)) != head);
826 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
828 struct nfs_lock_context *res, *new = NULL;
829 struct inode *inode = d_inode(ctx->dentry);
831 spin_lock(&inode->i_lock);
832 res = __nfs_find_lock_context(ctx);
834 spin_unlock(&inode->i_lock);
835 new = kmalloc(sizeof(*new), GFP_KERNEL);
837 return ERR_PTR(-ENOMEM);
838 nfs_init_lock_context(new);
839 spin_lock(&inode->i_lock);
840 res = __nfs_find_lock_context(ctx);
842 list_add_tail(&new->list, &ctx->lock_context.list);
843 new->open_context = ctx;
848 spin_unlock(&inode->i_lock);
852 EXPORT_SYMBOL_GPL(nfs_get_lock_context);
854 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
856 struct nfs_open_context *ctx = l_ctx->open_context;
857 struct inode *inode = d_inode(ctx->dentry);
859 if (!refcount_dec_and_lock(&l_ctx->count, &inode->i_lock))
861 list_del(&l_ctx->list);
862 spin_unlock(&inode->i_lock);
865 EXPORT_SYMBOL_GPL(nfs_put_lock_context);
868 * nfs_close_context - Common close_context() routine NFSv2/v3
869 * @ctx: pointer to context
870 * @is_sync: is this a synchronous close
872 * Ensure that the attributes are up to date if we're mounted
873 * with close-to-open semantics and we have cached data that will
874 * need to be revalidated on open.
876 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
878 struct nfs_inode *nfsi;
880 struct nfs_server *server;
882 if (!(ctx->mode & FMODE_WRITE))
886 inode = d_inode(ctx->dentry);
887 if (NFS_PROTO(inode)->have_delegation(inode, FMODE_READ))
890 if (inode->i_mapping->nrpages == 0)
892 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
894 if (!list_empty(&nfsi->open_files))
896 server = NFS_SERVER(inode);
897 if (server->flags & NFS_MOUNT_NOCTO)
899 nfs_revalidate_inode(server, inode);
901 EXPORT_SYMBOL_GPL(nfs_close_context);
903 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry,
907 struct nfs_open_context *ctx;
908 struct rpc_cred *cred = rpc_lookup_cred();
910 return ERR_CAST(cred);
912 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
915 return ERR_PTR(-ENOMEM);
917 nfs_sb_active(dentry->d_sb);
918 ctx->dentry = dget(dentry);
924 ctx->flock_owner = (fl_owner_t)filp;
925 nfs_init_lock_context(&ctx->lock_context);
926 ctx->lock_context.open_context = ctx;
927 INIT_LIST_HEAD(&ctx->list);
928 ctx->mdsthreshold = NULL;
931 EXPORT_SYMBOL_GPL(alloc_nfs_open_context);
933 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
936 refcount_inc(&ctx->lock_context.count);
939 EXPORT_SYMBOL_GPL(get_nfs_open_context);
941 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
943 struct inode *inode = d_inode(ctx->dentry);
944 struct super_block *sb = ctx->dentry->d_sb;
946 if (!list_empty(&ctx->list)) {
947 if (!refcount_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
949 list_del(&ctx->list);
950 spin_unlock(&inode->i_lock);
951 } else if (!refcount_dec_and_test(&ctx->lock_context.count))
954 NFS_PROTO(inode)->close_context(ctx, is_sync);
955 if (ctx->cred != NULL)
956 put_rpccred(ctx->cred);
959 kfree(ctx->mdsthreshold);
963 void put_nfs_open_context(struct nfs_open_context *ctx)
965 __put_nfs_open_context(ctx, 0);
967 EXPORT_SYMBOL_GPL(put_nfs_open_context);
969 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
971 __put_nfs_open_context(ctx, 1);
975 * Ensure that mmap has a recent RPC credential for use when writing out
978 void nfs_inode_attach_open_context(struct nfs_open_context *ctx)
980 struct inode *inode = d_inode(ctx->dentry);
981 struct nfs_inode *nfsi = NFS_I(inode);
983 spin_lock(&inode->i_lock);
984 if (ctx->mode & FMODE_WRITE)
985 list_add(&ctx->list, &nfsi->open_files);
987 list_add_tail(&ctx->list, &nfsi->open_files);
988 spin_unlock(&inode->i_lock);
990 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context);
992 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
994 filp->private_data = get_nfs_open_context(ctx);
995 if (list_empty(&ctx->list))
996 nfs_inode_attach_open_context(ctx);
998 EXPORT_SYMBOL_GPL(nfs_file_set_open_context);
1001 * Given an inode, search for an open context with the desired characteristics
1003 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
1005 struct nfs_inode *nfsi = NFS_I(inode);
1006 struct nfs_open_context *pos, *ctx = NULL;
1008 spin_lock(&inode->i_lock);
1009 list_for_each_entry(pos, &nfsi->open_files, list) {
1010 if (cred != NULL && pos->cred != cred)
1012 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
1014 ctx = get_nfs_open_context(pos);
1017 spin_unlock(&inode->i_lock);
1021 void nfs_file_clear_open_context(struct file *filp)
1023 struct nfs_open_context *ctx = nfs_file_open_context(filp);
1026 struct inode *inode = d_inode(ctx->dentry);
1029 * We fatal error on write before. Try to writeback
1033 invalidate_inode_pages2(inode->i_mapping);
1034 filp->private_data = NULL;
1035 spin_lock(&inode->i_lock);
1036 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
1037 spin_unlock(&inode->i_lock);
1038 put_nfs_open_context_sync(ctx);
1043 * These allocate and release file read/write context information.
1045 int nfs_open(struct inode *inode, struct file *filp)
1047 struct nfs_open_context *ctx;
1049 ctx = alloc_nfs_open_context(file_dentry(filp), filp->f_mode, filp);
1051 return PTR_ERR(ctx);
1052 nfs_file_set_open_context(filp, ctx);
1053 put_nfs_open_context(ctx);
1054 nfs_fscache_open_file(inode, filp);
1059 * This function is called whenever some part of NFS notices that
1060 * the cached attributes have to be refreshed.
1063 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1065 int status = -ESTALE;
1066 struct nfs4_label *label = NULL;
1067 struct nfs_fattr *fattr = NULL;
1068 struct nfs_inode *nfsi = NFS_I(inode);
1070 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Lu)\n",
1071 inode->i_sb->s_id, (unsigned long long)NFS_FILEID(inode));
1073 trace_nfs_revalidate_inode_enter(inode);
1075 if (is_bad_inode(inode))
1077 if (NFS_STALE(inode))
1080 /* pNFS: Attributes aren't updated until we layoutcommit */
1081 if (S_ISREG(inode->i_mode)) {
1082 status = pnfs_sync_inode(inode, false);
1088 fattr = nfs_alloc_fattr();
1092 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
1094 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
1095 if (IS_ERR(label)) {
1096 status = PTR_ERR(label);
1100 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr, label);
1102 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1104 (unsigned long long)NFS_FILEID(inode), status);
1105 if (status == -ESTALE) {
1106 nfs_zap_caches(inode);
1107 if (!S_ISDIR(inode->i_mode))
1108 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
1113 status = nfs_refresh_inode(inode, fattr);
1115 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1117 (unsigned long long)NFS_FILEID(inode), status);
1121 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
1122 nfs_zap_acl_cache(inode);
1124 nfs_setsecurity(inode, fattr, label);
1126 dfprintk(PAGECACHE, "NFS: (%s/%Lu) revalidation complete\n",
1128 (unsigned long long)NFS_FILEID(inode));
1131 nfs4_label_free(label);
1133 nfs_free_fattr(fattr);
1134 trace_nfs_revalidate_inode_exit(inode, status);
1138 int nfs_attribute_cache_expired(struct inode *inode)
1140 if (nfs_have_delegated_attributes(inode))
1142 return nfs_attribute_timeout(inode);
1146 * nfs_revalidate_inode - Revalidate the inode attributes
1147 * @server - pointer to nfs_server struct
1148 * @inode - pointer to inode struct
1150 * Updates inode attribute information by retrieving the data from the server.
1152 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
1154 if (!nfs_need_revalidate_inode(inode))
1155 return NFS_STALE(inode) ? -ESTALE : 0;
1156 return __nfs_revalidate_inode(server, inode);
1158 EXPORT_SYMBOL_GPL(nfs_revalidate_inode);
1160 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
1162 struct nfs_inode *nfsi = NFS_I(inode);
1165 if (mapping->nrpages != 0) {
1166 if (S_ISREG(inode->i_mode)) {
1167 ret = nfs_sync_mapping(mapping);
1171 ret = invalidate_inode_pages2(mapping);
1175 if (S_ISDIR(inode->i_mode)) {
1176 spin_lock(&inode->i_lock);
1177 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
1178 spin_unlock(&inode->i_lock);
1180 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
1181 nfs_fscache_wait_on_invalidate(inode);
1183 dfprintk(PAGECACHE, "NFS: (%s/%Lu) data cache invalidated\n",
1185 (unsigned long long)NFS_FILEID(inode));
1189 bool nfs_mapping_need_revalidate_inode(struct inode *inode)
1191 return nfs_check_cache_invalid(inode, NFS_INO_REVAL_PAGECACHE) ||
1195 int nfs_revalidate_mapping_rcu(struct inode *inode)
1197 struct nfs_inode *nfsi = NFS_I(inode);
1198 unsigned long *bitlock = &nfsi->flags;
1201 if (IS_SWAPFILE(inode))
1203 if (nfs_mapping_need_revalidate_inode(inode)) {
1207 spin_lock(&inode->i_lock);
1208 if (test_bit(NFS_INO_INVALIDATING, bitlock) ||
1209 (nfsi->cache_validity & NFS_INO_INVALID_DATA))
1211 spin_unlock(&inode->i_lock);
1217 * nfs_revalidate_mapping - Revalidate the pagecache
1218 * @inode - pointer to host inode
1219 * @mapping - pointer to mapping
1221 int nfs_revalidate_mapping(struct inode *inode,
1222 struct address_space *mapping)
1224 struct nfs_inode *nfsi = NFS_I(inode);
1225 unsigned long *bitlock = &nfsi->flags;
1228 /* swapfiles are not supposed to be shared. */
1229 if (IS_SWAPFILE(inode))
1232 if (nfs_mapping_need_revalidate_inode(inode)) {
1233 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
1239 * We must clear NFS_INO_INVALID_DATA first to ensure that
1240 * invalidations that come in while we're shooting down the mappings
1241 * are respected. But, that leaves a race window where one revalidator
1242 * can clear the flag, and then another checks it before the mapping
1243 * gets invalidated. Fix that by serializing access to this part of
1246 * At the same time, we need to allow other tasks to see whether we
1247 * might be in the middle of invalidating the pages, so we only set
1248 * the bit lock here if it looks like we're going to be doing that.
1251 ret = wait_on_bit_action(bitlock, NFS_INO_INVALIDATING,
1252 nfs_wait_bit_killable, TASK_KILLABLE);
1255 spin_lock(&inode->i_lock);
1256 if (test_bit(NFS_INO_INVALIDATING, bitlock)) {
1257 spin_unlock(&inode->i_lock);
1260 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
1262 spin_unlock(&inode->i_lock);
1266 set_bit(NFS_INO_INVALIDATING, bitlock);
1268 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
1269 spin_unlock(&inode->i_lock);
1270 trace_nfs_invalidate_mapping_enter(inode);
1271 ret = nfs_invalidate_mapping(inode, mapping);
1272 trace_nfs_invalidate_mapping_exit(inode, ret);
1274 clear_bit_unlock(NFS_INO_INVALIDATING, bitlock);
1275 smp_mb__after_atomic();
1276 wake_up_bit(bitlock, NFS_INO_INVALIDATING);
1281 static bool nfs_file_has_writers(struct nfs_inode *nfsi)
1283 struct inode *inode = &nfsi->vfs_inode;
1285 assert_spin_locked(&inode->i_lock);
1287 if (!S_ISREG(inode->i_mode))
1289 if (list_empty(&nfsi->open_files))
1291 /* Note: This relies on nfsi->open_files being ordered with writers
1292 * being placed at the head of the list.
1293 * See nfs_inode_attach_open_context()
1295 return (list_first_entry(&nfsi->open_files,
1296 struct nfs_open_context,
1297 list)->mode & FMODE_WRITE) == FMODE_WRITE;
1300 static bool nfs_file_has_buffered_writers(struct nfs_inode *nfsi)
1302 return nfs_file_has_writers(nfsi) && nfs_file_io_is_buffered(nfsi);
1305 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1309 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
1310 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
1311 && inode_eq_iversion_raw(inode, fattr->pre_change_attr)) {
1312 inode_set_iversion_raw(inode, fattr->change_attr);
1313 if (S_ISDIR(inode->i_mode))
1314 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1316 /* If we have atomic WCC data, we may update some attributes */
1317 ts = timespec64_to_timespec(inode->i_ctime);
1318 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
1319 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
1320 && timespec_equal(&ts, &fattr->pre_ctime)) {
1321 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
1324 ts = timespec64_to_timespec(inode->i_mtime);
1325 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
1326 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
1327 && timespec_equal(&ts, &fattr->pre_mtime)) {
1328 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
1329 if (S_ISDIR(inode->i_mode))
1330 nfs_set_cache_invalid(inode, NFS_INO_INVALID_DATA);
1332 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
1333 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
1334 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
1335 && !nfs_have_writebacks(inode)) {
1336 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
1341 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1342 * @inode - pointer to inode
1343 * @fattr - updated attributes
1345 * Verifies the attribute cache. If we have just changed the attributes,
1346 * so that fattr carries weak cache consistency data, then it may
1347 * also update the ctime/mtime/change_attribute.
1349 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
1351 struct nfs_inode *nfsi = NFS_I(inode);
1352 loff_t cur_size, new_isize;
1353 unsigned long invalid = 0;
1356 if (nfs_have_delegated_attributes(inode))
1358 /* Has the inode gone and changed behind our back? */
1359 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1361 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1364 if (!nfs_file_has_buffered_writers(nfsi)) {
1365 /* Verify a few of the more important attributes */
1366 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 && !inode_eq_iversion_raw(inode, fattr->change_attr))
1367 invalid |= NFS_INO_INVALID_CHANGE
1368 | NFS_INO_REVAL_PAGECACHE;
1370 ts = timespec64_to_timespec(inode->i_mtime);
1371 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&ts, &fattr->mtime))
1372 invalid |= NFS_INO_INVALID_MTIME;
1374 ts = timespec64_to_timespec(inode->i_ctime);
1375 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) && !timespec_equal(&ts, &fattr->ctime))
1376 invalid |= NFS_INO_INVALID_CTIME;
1378 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1379 cur_size = i_size_read(inode);
1380 new_isize = nfs_size_to_loff_t(fattr->size);
1381 if (cur_size != new_isize)
1382 invalid |= NFS_INO_INVALID_SIZE
1383 | NFS_INO_REVAL_PAGECACHE;
1387 /* Have any file permissions changed? */
1388 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
1389 invalid |= NFS_INO_INVALID_ACCESS
1390 | NFS_INO_INVALID_ACL
1391 | NFS_INO_INVALID_OTHER;
1392 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && !uid_eq(inode->i_uid, fattr->uid))
1393 invalid |= NFS_INO_INVALID_ACCESS
1394 | NFS_INO_INVALID_ACL
1395 | NFS_INO_INVALID_OTHER;
1396 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && !gid_eq(inode->i_gid, fattr->gid))
1397 invalid |= NFS_INO_INVALID_ACCESS
1398 | NFS_INO_INVALID_ACL
1399 | NFS_INO_INVALID_OTHER;
1401 /* Has the link count changed? */
1402 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
1403 invalid |= NFS_INO_INVALID_OTHER;
1405 ts = timespec64_to_timespec(inode->i_atime);
1406 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&ts, &fattr->atime))
1407 invalid |= NFS_INO_INVALID_ATIME;
1410 nfs_set_cache_invalid(inode, invalid | NFS_INO_REVAL_FORCED);
1412 nfsi->read_cache_jiffies = fattr->time_start;
1416 static atomic_long_t nfs_attr_generation_counter;
1418 static unsigned long nfs_read_attr_generation_counter(void)
1420 return atomic_long_read(&nfs_attr_generation_counter);
1423 unsigned long nfs_inc_attr_generation_counter(void)
1425 return atomic_long_inc_return(&nfs_attr_generation_counter);
1427 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter);
1429 void nfs_fattr_init(struct nfs_fattr *fattr)
1432 fattr->time_start = jiffies;
1433 fattr->gencount = nfs_inc_attr_generation_counter();
1434 fattr->owner_name = NULL;
1435 fattr->group_name = NULL;
1437 EXPORT_SYMBOL_GPL(nfs_fattr_init);
1440 * nfs_fattr_set_barrier
1441 * @fattr: attributes
1443 * Used to set a barrier after an attribute was updated. This
1444 * barrier ensures that older attributes from RPC calls that may
1445 * have raced with our update cannot clobber these new values.
1446 * Note that you are still responsible for ensuring that other
1447 * operations which change the attribute on the server do not
1450 void nfs_fattr_set_barrier(struct nfs_fattr *fattr)
1452 fattr->gencount = nfs_inc_attr_generation_counter();
1455 struct nfs_fattr *nfs_alloc_fattr(void)
1457 struct nfs_fattr *fattr;
1459 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1461 nfs_fattr_init(fattr);
1464 EXPORT_SYMBOL_GPL(nfs_alloc_fattr);
1466 struct nfs_fh *nfs_alloc_fhandle(void)
1470 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1475 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle);
1479 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1480 * in the same way that wireshark does
1484 * For debugging only.
1486 u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
1488 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1489 * not on the result */
1490 return nfs_fhandle_hash(fh);
1492 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash);
1495 * _nfs_display_fhandle - display an NFS file handle on the console
1497 * @fh: file handle to display
1498 * @caption: display caption
1500 * For debugging only.
1502 void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
1506 if (fh == NULL || fh->size == 0) {
1507 printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
1511 printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
1512 caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
1513 for (i = 0; i < fh->size; i += 16) {
1514 __be32 *pos = (__be32 *)&fh->data[i];
1516 switch ((fh->size - i - 1) >> 2) {
1518 printk(KERN_DEFAULT " %08x\n",
1522 printk(KERN_DEFAULT " %08x %08x\n",
1523 be32_to_cpup(pos), be32_to_cpup(pos + 1));
1526 printk(KERN_DEFAULT " %08x %08x %08x\n",
1527 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1528 be32_to_cpup(pos + 2));
1531 printk(KERN_DEFAULT " %08x %08x %08x %08x\n",
1532 be32_to_cpup(pos), be32_to_cpup(pos + 1),
1533 be32_to_cpup(pos + 2), be32_to_cpup(pos + 3));
1537 EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
1541 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1542 * @inode - pointer to inode
1543 * @fattr - attributes
1545 * Attempt to divine whether or not an RPC call reply carrying stale
1546 * attributes got scheduled after another call carrying updated ones.
1548 * To do so, the function first assumes that a more recent ctime means
1549 * that the attributes in fattr are newer, however it also attempt to
1550 * catch the case where ctime either didn't change, or went backwards
1551 * (if someone reset the clock on the server) by looking at whether
1552 * or not this RPC call was started after the inode was last updated.
1553 * Note also the check for wraparound of 'attr_gencount'
1555 * The function returns 'true' if it thinks the attributes in 'fattr' are
1556 * more recent than the ones cached in the inode.
1559 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1561 const struct nfs_inode *nfsi = NFS_I(inode);
1563 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1564 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1567 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1571 trace_nfs_refresh_inode_enter(inode);
1573 if (nfs_inode_attrs_need_update(inode, fattr))
1574 ret = nfs_update_inode(inode, fattr);
1576 ret = nfs_check_inode_attributes(inode, fattr);
1578 trace_nfs_refresh_inode_exit(inode, ret);
1583 * nfs_refresh_inode - try to update the inode attribute cache
1584 * @inode - pointer to inode
1585 * @fattr - updated attributes
1587 * Check that an RPC call that returned attributes has not overlapped with
1588 * other recent updates of the inode metadata, then decide whether it is
1589 * safe to do a full update of the inode attributes, or whether just to
1590 * call nfs_check_inode_attributes.
1592 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1596 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1598 spin_lock(&inode->i_lock);
1599 status = nfs_refresh_inode_locked(inode, fattr);
1600 spin_unlock(&inode->i_lock);
1604 EXPORT_SYMBOL_GPL(nfs_refresh_inode);
1606 static int nfs_post_op_update_inode_locked(struct inode *inode,
1607 struct nfs_fattr *fattr, unsigned int invalid)
1609 if (S_ISDIR(inode->i_mode))
1610 invalid |= NFS_INO_INVALID_DATA;
1611 nfs_set_cache_invalid(inode, invalid);
1612 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1614 return nfs_refresh_inode_locked(inode, fattr);
1618 * nfs_post_op_update_inode - try to update the inode attribute cache
1619 * @inode - pointer to inode
1620 * @fattr - updated attributes
1622 * After an operation that has changed the inode metadata, mark the
1623 * attribute cache as being invalid, then try to update it.
1625 * NB: if the server didn't return any post op attributes, this
1626 * function will force the retrieval of attributes before the next
1627 * NFS request. Thus it should be used only for operations that
1628 * are expected to change one or more attributes, to avoid
1629 * unnecessary NFS requests and trips through nfs_update_inode().
1631 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1635 spin_lock(&inode->i_lock);
1636 nfs_fattr_set_barrier(fattr);
1637 status = nfs_post_op_update_inode_locked(inode, fattr,
1638 NFS_INO_INVALID_CHANGE
1639 | NFS_INO_INVALID_CTIME);
1640 spin_unlock(&inode->i_lock);
1644 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
1647 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1648 * @inode - pointer to inode
1649 * @fattr - updated attributes
1651 * After an operation that has changed the inode metadata, mark the
1652 * attribute cache as being invalid, then try to update it. Fake up
1653 * weak cache consistency data, if none exist.
1655 * This function is mainly designed to be used by the ->write_done() functions.
1657 int nfs_post_op_update_inode_force_wcc_locked(struct inode *inode, struct nfs_fattr *fattr)
1661 /* Don't do a WCC update if these attributes are already stale */
1662 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1663 !nfs_inode_attrs_need_update(inode, fattr)) {
1664 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1665 | NFS_ATTR_FATTR_PRESIZE
1666 | NFS_ATTR_FATTR_PREMTIME
1667 | NFS_ATTR_FATTR_PRECTIME);
1670 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1671 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1672 fattr->pre_change_attr = inode_peek_iversion_raw(inode);
1673 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1675 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1676 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1677 fattr->pre_ctime = timespec64_to_timespec(inode->i_ctime);
1678 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1680 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1681 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1682 fattr->pre_mtime = timespec64_to_timespec(inode->i_mtime);
1683 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1685 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1686 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1687 fattr->pre_size = i_size_read(inode);
1688 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1691 status = nfs_post_op_update_inode_locked(inode, fattr,
1692 NFS_INO_INVALID_CHANGE
1693 | NFS_INO_INVALID_CTIME
1694 | NFS_INO_INVALID_MTIME);
1699 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1700 * @inode - pointer to inode
1701 * @fattr - updated attributes
1703 * After an operation that has changed the inode metadata, mark the
1704 * attribute cache as being invalid, then try to update it. Fake up
1705 * weak cache consistency data, if none exist.
1707 * This function is mainly designed to be used by the ->write_done() functions.
1709 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1713 spin_lock(&inode->i_lock);
1714 nfs_fattr_set_barrier(fattr);
1715 status = nfs_post_op_update_inode_force_wcc_locked(inode, fattr);
1716 spin_unlock(&inode->i_lock);
1719 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc);
1722 static inline bool nfs_fileid_valid(struct nfs_inode *nfsi,
1723 struct nfs_fattr *fattr)
1725 bool ret1 = true, ret2 = true;
1727 if (fattr->valid & NFS_ATTR_FATTR_FILEID)
1728 ret1 = (nfsi->fileid == fattr->fileid);
1729 if (fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
1730 ret2 = (nfsi->fileid == fattr->mounted_on_fileid);
1731 return ret1 || ret2;
1735 * Many nfs protocol calls return the new file attributes after
1736 * an operation. Here we update the inode to reflect the state
1737 * of the server's inode.
1739 * This is a bit tricky because we have to make sure all dirty pages
1740 * have been sent off to the server before calling invalidate_inode_pages.
1741 * To make sure no other process adds more write requests while we try
1742 * our best to flush them, we make them sleep during the attribute refresh.
1744 * A very similar scenario holds for the dir cache.
1746 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1748 struct nfs_server *server;
1749 struct nfs_inode *nfsi = NFS_I(inode);
1750 loff_t cur_isize, new_isize;
1751 unsigned long invalid = 0;
1752 unsigned long now = jiffies;
1753 unsigned long save_cache_validity;
1754 bool have_writers = nfs_file_has_buffered_writers(nfsi);
1755 bool cache_revalidated = true;
1757 dfprintk(VFS, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1758 __func__, inode->i_sb->s_id, inode->i_ino,
1759 nfs_display_fhandle_hash(NFS_FH(inode)),
1760 atomic_read(&inode->i_count), fattr->valid);
1762 if (!nfs_fileid_valid(nfsi, fattr)) {
1763 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1764 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1765 NFS_SERVER(inode)->nfs_client->cl_hostname,
1766 inode->i_sb->s_id, (long long)nfsi->fileid,
1767 (long long)fattr->fileid);
1772 * Make sure the inode's type hasn't changed.
1774 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT)) {
1776 * Big trouble! The inode has become a different object.
1778 printk(KERN_DEBUG "NFS: %s: inode %lu mode changed, %07o to %07o\n",
1779 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1783 server = NFS_SERVER(inode);
1784 /* Update the fsid? */
1785 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1786 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1787 !IS_AUTOMOUNT(inode))
1788 server->fsid = fattr->fsid;
1791 * Update the read time so we don't revalidate too often.
1793 nfsi->read_cache_jiffies = fattr->time_start;
1795 save_cache_validity = nfsi->cache_validity;
1796 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1797 | NFS_INO_INVALID_ATIME
1798 | NFS_INO_REVAL_FORCED
1799 | NFS_INO_REVAL_PAGECACHE);
1801 /* Do atomic weak cache consistency updates */
1802 nfs_wcc_update_inode(inode, fattr);
1804 if (pnfs_layoutcommit_outstanding(inode)) {
1805 nfsi->cache_validity |= save_cache_validity & NFS_INO_INVALID_ATTR;
1806 cache_revalidated = false;
1809 /* More cache consistency checks */
1810 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1811 if (!inode_eq_iversion_raw(inode, fattr->change_attr)) {
1812 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1813 inode->i_sb->s_id, inode->i_ino);
1814 /* Could it be a race with writeback? */
1815 if (!have_writers) {
1816 invalid |= NFS_INO_INVALID_CHANGE
1817 | NFS_INO_INVALID_DATA
1818 | NFS_INO_INVALID_ACCESS
1819 | NFS_INO_INVALID_ACL;
1820 /* Force revalidate of all attributes */
1821 save_cache_validity |= NFS_INO_INVALID_CTIME
1822 | NFS_INO_INVALID_MTIME
1823 | NFS_INO_INVALID_SIZE
1824 | NFS_INO_INVALID_OTHER;
1825 if (S_ISDIR(inode->i_mode))
1826 nfs_force_lookup_revalidate(inode);
1828 inode_set_iversion_raw(inode, fattr->change_attr);
1831 nfsi->cache_validity |= save_cache_validity &
1832 (NFS_INO_INVALID_CHANGE
1833 | NFS_INO_REVAL_PAGECACHE
1834 | NFS_INO_REVAL_FORCED);
1835 cache_revalidated = false;
1838 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1839 inode->i_mtime = timespec_to_timespec64(fattr->mtime);
1840 } else if (server->caps & NFS_CAP_MTIME) {
1841 nfsi->cache_validity |= save_cache_validity &
1842 (NFS_INO_INVALID_MTIME
1843 | NFS_INO_REVAL_FORCED);
1844 cache_revalidated = false;
1847 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1848 inode->i_ctime = timespec_to_timespec64(fattr->ctime);
1849 } else if (server->caps & NFS_CAP_CTIME) {
1850 nfsi->cache_validity |= save_cache_validity &
1851 (NFS_INO_INVALID_CTIME
1852 | NFS_INO_REVAL_FORCED);
1853 cache_revalidated = false;
1856 /* Check if our cached file size is stale */
1857 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1858 new_isize = nfs_size_to_loff_t(fattr->size);
1859 cur_isize = i_size_read(inode);
1860 if (new_isize != cur_isize) {
1861 /* Do we perhaps have any outstanding writes, or has
1862 * the file grown beyond our last write? */
1863 if (!nfs_have_writebacks(inode) || new_isize > cur_isize) {
1864 i_size_write(inode, new_isize);
1866 invalid |= NFS_INO_INVALID_DATA;
1868 dprintk("NFS: isize change on server for file %s/%ld "
1872 (long long)cur_isize,
1873 (long long)new_isize);
1876 nfsi->cache_validity |= save_cache_validity &
1877 (NFS_INO_INVALID_SIZE
1878 | NFS_INO_REVAL_PAGECACHE
1879 | NFS_INO_REVAL_FORCED);
1880 cache_revalidated = false;
1884 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1885 inode->i_atime = timespec_to_timespec64(fattr->atime);
1886 else if (server->caps & NFS_CAP_ATIME) {
1887 nfsi->cache_validity |= save_cache_validity &
1888 (NFS_INO_INVALID_ATIME
1889 | NFS_INO_REVAL_FORCED);
1890 cache_revalidated = false;
1893 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1894 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1895 umode_t newmode = inode->i_mode & S_IFMT;
1896 newmode |= fattr->mode & S_IALLUGO;
1897 inode->i_mode = newmode;
1898 invalid |= NFS_INO_INVALID_ACCESS
1899 | NFS_INO_INVALID_ACL
1900 | NFS_INO_INVALID_OTHER;
1902 } else if (server->caps & NFS_CAP_MODE) {
1903 nfsi->cache_validity |= save_cache_validity &
1904 (NFS_INO_INVALID_ACCESS
1905 | NFS_INO_INVALID_ACL
1906 | NFS_INO_INVALID_OTHER
1907 | NFS_INO_REVAL_FORCED);
1908 cache_revalidated = false;
1911 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1912 if (!uid_eq(inode->i_uid, fattr->uid)) {
1913 invalid |= NFS_INO_INVALID_ACCESS
1914 | NFS_INO_INVALID_ACL
1915 | NFS_INO_INVALID_OTHER;
1916 inode->i_uid = fattr->uid;
1918 } else if (server->caps & NFS_CAP_OWNER) {
1919 nfsi->cache_validity |= save_cache_validity &
1920 (NFS_INO_INVALID_ACCESS
1921 | NFS_INO_INVALID_ACL
1922 | NFS_INO_INVALID_OTHER
1923 | NFS_INO_REVAL_FORCED);
1924 cache_revalidated = false;
1927 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1928 if (!gid_eq(inode->i_gid, fattr->gid)) {
1929 invalid |= NFS_INO_INVALID_ACCESS
1930 | NFS_INO_INVALID_ACL
1931 | NFS_INO_INVALID_OTHER;
1932 inode->i_gid = fattr->gid;
1934 } else if (server->caps & NFS_CAP_OWNER_GROUP) {
1935 nfsi->cache_validity |= save_cache_validity &
1936 (NFS_INO_INVALID_ACCESS
1937 | NFS_INO_INVALID_ACL
1938 | NFS_INO_INVALID_OTHER
1939 | NFS_INO_REVAL_FORCED);
1940 cache_revalidated = false;
1943 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1944 if (inode->i_nlink != fattr->nlink) {
1945 invalid |= NFS_INO_INVALID_OTHER;
1946 if (S_ISDIR(inode->i_mode))
1947 invalid |= NFS_INO_INVALID_DATA;
1948 set_nlink(inode, fattr->nlink);
1950 } else if (server->caps & NFS_CAP_NLINK) {
1951 nfsi->cache_validity |= save_cache_validity &
1952 (NFS_INO_INVALID_OTHER
1953 | NFS_INO_REVAL_FORCED);
1954 cache_revalidated = false;
1957 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1959 * report the blocks in 512byte units
1961 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1962 } else if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1963 inode->i_blocks = fattr->du.nfs2.blocks;
1965 cache_revalidated = false;
1967 /* Update attrtimeo value if we're out of the unstable period */
1968 if (invalid & NFS_INO_INVALID_ATTR) {
1969 invalid &= ~NFS_INO_INVALID_ATTR;
1970 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1971 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1972 nfsi->attrtimeo_timestamp = now;
1973 /* Set barrier to be more recent than all outstanding updates */
1974 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1976 if (cache_revalidated) {
1977 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp,
1978 nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1979 nfsi->attrtimeo <<= 1;
1980 if (nfsi->attrtimeo > NFS_MAXATTRTIMEO(inode))
1981 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1983 nfsi->attrtimeo_timestamp = now;
1985 /* Set the barrier to be more recent than this fattr */
1986 if ((long)fattr->gencount - (long)nfsi->attr_gencount > 0)
1987 nfsi->attr_gencount = fattr->gencount;
1990 /* Don't invalidate the data if we were to blame */
1991 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1992 || S_ISLNK(inode->i_mode)))
1993 invalid &= ~NFS_INO_INVALID_DATA;
1994 if (!NFS_PROTO(inode)->have_delegation(inode, FMODE_READ) ||
1995 (save_cache_validity & NFS_INO_REVAL_FORCED))
1996 nfs_set_cache_invalid(inode, invalid);
2001 * No need to worry about unhashing the dentry, as the
2002 * lookup validation will know that the inode is bad.
2003 * (But we fall through to invalidate the caches.)
2005 nfs_invalidate_inode(inode);
2009 struct inode *nfs_alloc_inode(struct super_block *sb)
2011 struct nfs_inode *nfsi;
2012 nfsi = kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
2016 nfsi->cache_validity = 0UL;
2017 #if IS_ENABLED(CONFIG_NFS_V4)
2018 nfsi->nfs4_acl = NULL;
2019 #endif /* CONFIG_NFS_V4 */
2020 return &nfsi->vfs_inode;
2022 EXPORT_SYMBOL_GPL(nfs_alloc_inode);
2024 static void nfs_i_callback(struct rcu_head *head)
2026 struct inode *inode = container_of(head, struct inode, i_rcu);
2027 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
2030 void nfs_destroy_inode(struct inode *inode)
2032 call_rcu(&inode->i_rcu, nfs_i_callback);
2034 EXPORT_SYMBOL_GPL(nfs_destroy_inode);
2036 static inline void nfs4_init_once(struct nfs_inode *nfsi)
2038 #if IS_ENABLED(CONFIG_NFS_V4)
2039 INIT_LIST_HEAD(&nfsi->open_states);
2040 nfsi->delegation = NULL;
2041 init_rwsem(&nfsi->rwsem);
2042 nfsi->layout = NULL;
2046 static void init_once(void *foo)
2048 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
2050 inode_init_once(&nfsi->vfs_inode);
2051 INIT_LIST_HEAD(&nfsi->open_files);
2052 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
2053 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
2054 INIT_LIST_HEAD(&nfsi->commit_info.list);
2055 atomic_long_set(&nfsi->nrequests, 0);
2056 atomic_long_set(&nfsi->commit_info.ncommit, 0);
2057 atomic_set(&nfsi->commit_info.rpcs_out, 0);
2058 init_rwsem(&nfsi->rmdir_sem);
2059 mutex_init(&nfsi->commit_mutex);
2060 nfs4_init_once(nfsi);
2063 static int __init nfs_init_inodecache(void)
2065 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
2066 sizeof(struct nfs_inode),
2067 0, (SLAB_RECLAIM_ACCOUNT|
2068 SLAB_MEM_SPREAD|SLAB_ACCOUNT),
2070 if (nfs_inode_cachep == NULL)
2076 static void nfs_destroy_inodecache(void)
2079 * Make sure all delayed rcu free inodes are flushed before we
2083 kmem_cache_destroy(nfs_inode_cachep);
2086 struct workqueue_struct *nfsiod_workqueue;
2087 EXPORT_SYMBOL_GPL(nfsiod_workqueue);
2090 * start up the nfsiod workqueue
2092 static int nfsiod_start(void)
2094 struct workqueue_struct *wq;
2095 dprintk("RPC: creating workqueue nfsiod\n");
2096 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
2099 nfsiod_workqueue = wq;
2104 * Destroy the nfsiod workqueue
2106 static void nfsiod_stop(void)
2108 struct workqueue_struct *wq;
2110 wq = nfsiod_workqueue;
2113 nfsiod_workqueue = NULL;
2114 destroy_workqueue(wq);
2117 unsigned int nfs_net_id;
2118 EXPORT_SYMBOL_GPL(nfs_net_id);
2120 static int nfs_net_init(struct net *net)
2122 nfs_clients_init(net);
2123 return nfs_fs_proc_net_init(net);
2126 static void nfs_net_exit(struct net *net)
2128 struct nfs_net *nn = net_generic(net, nfs_net_id);
2130 nfs_fs_proc_net_exit(net);
2131 nfs_cleanup_cb_ident_idr(net);
2132 WARN_ON_ONCE(!list_empty(&nn->nfs_client_list));
2133 WARN_ON_ONCE(!list_empty(&nn->nfs_volume_list));
2136 static struct pernet_operations nfs_net_ops = {
2137 .init = nfs_net_init,
2138 .exit = nfs_net_exit,
2140 .size = sizeof(struct nfs_net),
2146 static int __init init_nfs_fs(void)
2150 err = register_pernet_subsys(&nfs_net_ops);
2154 err = nfs_fscache_register();
2158 err = nfsiod_start();
2162 err = nfs_fs_proc_init();
2166 err = nfs_init_nfspagecache();
2170 err = nfs_init_inodecache();
2174 err = nfs_init_readpagecache();
2178 err = nfs_init_writepagecache();
2182 err = nfs_init_directcache();
2186 rpc_proc_register(&init_net, &nfs_rpcstat);
2188 err = register_nfs_fs();
2194 rpc_proc_unregister(&init_net, "nfs");
2195 nfs_destroy_directcache();
2197 nfs_destroy_writepagecache();
2199 nfs_destroy_readpagecache();
2201 nfs_destroy_inodecache();
2203 nfs_destroy_nfspagecache();
2209 nfs_fscache_unregister();
2211 unregister_pernet_subsys(&nfs_net_ops);
2216 static void __exit exit_nfs_fs(void)
2218 nfs_destroy_directcache();
2219 nfs_destroy_writepagecache();
2220 nfs_destroy_readpagecache();
2221 nfs_destroy_inodecache();
2222 nfs_destroy_nfspagecache();
2223 nfs_fscache_unregister();
2224 unregister_pernet_subsys(&nfs_net_ops);
2225 rpc_proc_unregister(&init_net, "nfs");
2226 unregister_nfs_fs();
2231 /* Not quite true; I just maintain it */
2232 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2233 MODULE_LICENSE("GPL");
2234 module_param(enable_ino64, bool, 0644);
2236 module_init(init_nfs_fs)
2237 module_exit(exit_nfs_fs)