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.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/smp_lock.h>
34 #include <linux/seq_file.h>
35 #include <linux/mount.h>
36 #include <linux/nfs_idmap.h>
37 #include <linux/vfs.h>
38 #include <linux/inet.h>
39 #include <linux/nfs_xdr.h>
41 #include <asm/system.h>
42 #include <asm/uaccess.h>
46 #include "delegation.h"
50 #define NFSDBG_FACILITY NFSDBG_VFS
52 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
54 /* Default is to see 64-bit inode numbers */
55 static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
57 static void nfs_invalidate_inode(struct inode *);
58 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
60 static struct kmem_cache * nfs_inode_cachep;
62 static inline unsigned long
63 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
65 return nfs_fileid_to_ino_t(fattr->fileid);
69 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
70 * @word: long word containing the bit lock
72 int nfs_wait_bit_killable(void *word)
74 if (fatal_signal_pending(current))
81 * nfs_compat_user_ino64 - returns the user-visible inode number
82 * @fileid: 64-bit fileid
84 * This function returns a 32-bit inode number if the boot parameter
85 * nfs.enable_ino64 is zero.
87 u64 nfs_compat_user_ino64(u64 fileid)
94 if (sizeof(ino) < sizeof(fileid))
95 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
99 int nfs_write_inode(struct inode *inode, int sync)
104 ret = filemap_fdatawait(inode->i_mapping);
106 ret = nfs_commit_inode(inode, FLUSH_SYNC);
108 ret = nfs_commit_inode(inode, 0);
111 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
115 void nfs_clear_inode(struct inode *inode)
118 * The following should never happen...
120 BUG_ON(nfs_have_writebacks(inode));
121 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
122 nfs_zap_acl_cache(inode);
123 nfs_access_zap_cache(inode);
127 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
129 int nfs_sync_mapping(struct address_space *mapping)
133 if (mapping->nrpages == 0)
135 unmap_mapping_range(mapping, 0, 0, 0);
136 ret = filemap_write_and_wait(mapping);
139 ret = nfs_wb_all(mapping->host);
145 * Invalidate the local caches
147 static void nfs_zap_caches_locked(struct inode *inode)
149 struct nfs_inode *nfsi = NFS_I(inode);
150 int mode = inode->i_mode;
152 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
154 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
155 nfsi->attrtimeo_timestamp = jiffies;
157 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
158 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
159 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
161 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
164 void nfs_zap_caches(struct inode *inode)
166 spin_lock(&inode->i_lock);
167 nfs_zap_caches_locked(inode);
168 spin_unlock(&inode->i_lock);
171 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
173 if (mapping->nrpages != 0) {
174 spin_lock(&inode->i_lock);
175 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
176 spin_unlock(&inode->i_lock);
180 void nfs_zap_acl_cache(struct inode *inode)
182 void (*clear_acl_cache)(struct inode *);
184 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
185 if (clear_acl_cache != NULL)
186 clear_acl_cache(inode);
187 spin_lock(&inode->i_lock);
188 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
189 spin_unlock(&inode->i_lock);
192 void nfs_invalidate_atime(struct inode *inode)
194 spin_lock(&inode->i_lock);
195 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
196 spin_unlock(&inode->i_lock);
200 * Invalidate, but do not unhash, the inode.
201 * NB: must be called with inode->i_lock held!
203 static void nfs_invalidate_inode(struct inode *inode)
205 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
206 nfs_zap_caches_locked(inode);
209 struct nfs_find_desc {
211 struct nfs_fattr *fattr;
215 * In NFSv3 we can have 64bit inode numbers. In order to support
216 * this, and re-exported directories (also seen in NFSv2)
217 * we are forced to allow 2 different inodes to have the same
221 nfs_find_actor(struct inode *inode, void *opaque)
223 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
224 struct nfs_fh *fh = desc->fh;
225 struct nfs_fattr *fattr = desc->fattr;
227 if (NFS_FILEID(inode) != fattr->fileid)
229 if (nfs_compare_fh(NFS_FH(inode), fh))
231 if (is_bad_inode(inode) || NFS_STALE(inode))
237 nfs_init_locked(struct inode *inode, void *opaque)
239 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
240 struct nfs_fattr *fattr = desc->fattr;
242 set_nfs_fileid(inode, fattr->fileid);
243 nfs_copy_fh(NFS_FH(inode), desc->fh);
247 /* Don't use READDIRPLUS on directories that we believe are too large */
248 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
251 * This is our front-end to iget that looks up inodes by file handle
252 * instead of inode number.
255 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
257 struct nfs_find_desc desc = {
261 struct inode *inode = ERR_PTR(-ENOENT);
264 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
266 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
269 hash = nfs_fattr_to_ino_t(fattr);
271 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
273 inode = ERR_PTR(-ENOMEM);
277 if (inode->i_state & I_NEW) {
278 struct nfs_inode *nfsi = NFS_I(inode);
279 unsigned long now = jiffies;
281 /* We set i_ino for the few things that still rely on it,
285 /* We can't support update_atime(), since the server will reset it */
286 inode->i_flags |= S_NOATIME|S_NOCMTIME;
287 inode->i_mode = fattr->mode;
288 /* Why so? Because we want revalidate for devices/FIFOs, and
289 * that's precisely what we have in nfs_file_inode_operations.
291 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
292 if (S_ISREG(inode->i_mode)) {
293 inode->i_fop = &nfs_file_operations;
294 inode->i_data.a_ops = &nfs_file_aops;
295 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
296 } else if (S_ISDIR(inode->i_mode)) {
297 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
298 inode->i_fop = &nfs_dir_operations;
299 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
300 && fattr->size <= NFS_LIMIT_READDIRPLUS)
301 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
302 /* Deal with crossing mountpoints */
303 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
304 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
305 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
306 inode->i_op = &nfs_referral_inode_operations;
308 inode->i_op = &nfs_mountpoint_inode_operations;
310 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
312 } else if (S_ISLNK(inode->i_mode))
313 inode->i_op = &nfs_symlink_inode_operations;
315 init_special_inode(inode, inode->i_mode, fattr->rdev);
317 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
318 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
319 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
320 nfsi->change_attr = 0;
326 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
328 nfsi->read_cache_jiffies = fattr->time_start;
329 nfsi->attr_gencount = fattr->gencount;
330 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
331 inode->i_atime = fattr->atime;
332 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
333 inode->i_mtime = fattr->mtime;
334 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
335 inode->i_ctime = fattr->ctime;
336 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
337 nfsi->change_attr = fattr->change_attr;
338 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
339 inode->i_size = nfs_size_to_loff_t(fattr->size);
340 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
341 inode->i_nlink = fattr->nlink;
342 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
343 inode->i_uid = fattr->uid;
344 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
345 inode->i_gid = fattr->gid;
346 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
347 inode->i_blocks = fattr->du.nfs2.blocks;
348 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
350 * report the blocks in 512byte units
352 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
354 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
355 nfsi->attrtimeo_timestamp = now;
356 nfsi->access_cache = RB_ROOT;
358 unlock_new_inode(inode);
360 nfs_refresh_inode(inode, fattr);
361 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
363 (long long)NFS_FILEID(inode),
364 atomic_read(&inode->i_count));
370 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
374 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
377 nfs_setattr(struct dentry *dentry, struct iattr *attr)
379 struct inode *inode = dentry->d_inode;
380 struct nfs_fattr fattr;
383 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
385 /* skip mode change if it's just for clearing setuid/setgid */
386 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
387 attr->ia_valid &= ~ATTR_MODE;
389 if (attr->ia_valid & ATTR_SIZE) {
390 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
391 attr->ia_valid &= ~ATTR_SIZE;
394 /* Optimization: if the end result is no change, don't RPC */
395 attr->ia_valid &= NFS_VALID_ATTRS;
396 if ((attr->ia_valid & ~ATTR_FILE) == 0)
399 /* Write all dirty data */
400 if (S_ISREG(inode->i_mode)) {
401 filemap_write_and_wait(inode->i_mapping);
405 * Return any delegations if we're going to change ACLs
407 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
408 nfs_inode_return_delegation(inode);
409 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
411 nfs_refresh_inode(inode, &fattr);
416 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
417 * @inode: inode of the file used
418 * @offset: file offset to start truncating
420 * This is a copy of the common vmtruncate, but with the locking
421 * corrected to take into account the fact that NFS requires
422 * inode->i_size to be updated under the inode->i_lock.
424 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
426 if (i_size_read(inode) < offset) {
429 limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
430 if (limit != RLIM_INFINITY && offset > limit)
432 if (offset > inode->i_sb->s_maxbytes)
434 spin_lock(&inode->i_lock);
435 i_size_write(inode, offset);
436 spin_unlock(&inode->i_lock);
438 struct address_space *mapping = inode->i_mapping;
441 * truncation of in-use swapfiles is disallowed - it would
442 * cause subsequent swapout to scribble on the now-freed
445 if (IS_SWAPFILE(inode))
447 spin_lock(&inode->i_lock);
448 i_size_write(inode, offset);
449 spin_unlock(&inode->i_lock);
452 * unmap_mapping_range is called twice, first simply for
453 * efficiency so that truncate_inode_pages does fewer
454 * single-page unmaps. However after this first call, and
455 * before truncate_inode_pages finishes, it is possible for
456 * private pages to be COWed, which remain after
457 * truncate_inode_pages finishes, hence the second
458 * unmap_mapping_range call must be made for correctness.
460 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
461 truncate_inode_pages(mapping, offset);
462 unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
466 send_sig(SIGXFSZ, current, 0);
472 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
473 * @inode: pointer to struct inode
474 * @attr: pointer to struct iattr
476 * Note: we do this in the *proc.c in order to ensure that
477 * it works for things like exclusive creates too.
479 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
481 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
482 spin_lock(&inode->i_lock);
483 if ((attr->ia_valid & ATTR_MODE) != 0) {
484 int mode = attr->ia_mode & S_IALLUGO;
485 mode |= inode->i_mode & ~S_IALLUGO;
486 inode->i_mode = mode;
488 if ((attr->ia_valid & ATTR_UID) != 0)
489 inode->i_uid = attr->ia_uid;
490 if ((attr->ia_valid & ATTR_GID) != 0)
491 inode->i_gid = attr->ia_gid;
492 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
493 spin_unlock(&inode->i_lock);
495 if ((attr->ia_valid & ATTR_SIZE) != 0) {
496 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
497 nfs_vmtruncate(inode, attr->ia_size);
501 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
503 struct inode *inode = dentry->d_inode;
504 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
508 * Flush out writes to the server in order to update c/mtime.
510 * Hold the i_mutex to suspend application writes temporarily;
511 * this prevents long-running writing applications from blocking
514 if (S_ISREG(inode->i_mode)) {
515 mutex_lock(&inode->i_mutex);
516 nfs_wb_nocommit(inode);
517 mutex_unlock(&inode->i_mutex);
521 * We may force a getattr if the user cares about atime.
523 * Note that we only have to check the vfsmount flags here:
524 * - NFS always sets S_NOATIME by so checking it would give a
526 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
527 * no point in checking those.
529 if ((mnt->mnt_flags & MNT_NOATIME) ||
530 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
534 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
536 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
538 generic_fillattr(inode, stat);
539 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
544 static struct nfs_open_context *alloc_nfs_open_context(struct vfsmount *mnt, struct dentry *dentry, struct rpc_cred *cred)
546 struct nfs_open_context *ctx;
548 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
550 ctx->path.dentry = dget(dentry);
551 ctx->path.mnt = mntget(mnt);
552 ctx->cred = get_rpccred(cred);
554 ctx->lockowner = current->files;
558 atomic_set(&ctx->count, 1);
563 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
566 atomic_inc(&ctx->count);
570 static void __put_nfs_open_context(struct nfs_open_context *ctx, int wait)
577 inode = ctx->path.dentry->d_inode;
578 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
580 list_del(&ctx->list);
581 spin_unlock(&inode->i_lock);
582 if (ctx->state != NULL) {
584 nfs4_close_sync(&ctx->path, ctx->state, ctx->mode);
586 nfs4_close_state(&ctx->path, ctx->state, ctx->mode);
588 if (ctx->cred != NULL)
589 put_rpccred(ctx->cred);
590 path_put(&ctx->path);
594 void put_nfs_open_context(struct nfs_open_context *ctx)
596 __put_nfs_open_context(ctx, 0);
599 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
601 __put_nfs_open_context(ctx, 1);
605 * Ensure that mmap has a recent RPC credential for use when writing out
608 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
610 struct inode *inode = filp->f_path.dentry->d_inode;
611 struct nfs_inode *nfsi = NFS_I(inode);
613 filp->private_data = get_nfs_open_context(ctx);
614 spin_lock(&inode->i_lock);
615 list_add(&ctx->list, &nfsi->open_files);
616 spin_unlock(&inode->i_lock);
620 * Given an inode, search for an open context with the desired characteristics
622 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
624 struct nfs_inode *nfsi = NFS_I(inode);
625 struct nfs_open_context *pos, *ctx = NULL;
627 spin_lock(&inode->i_lock);
628 list_for_each_entry(pos, &nfsi->open_files, list) {
629 if (cred != NULL && pos->cred != cred)
631 if ((pos->mode & mode) == mode) {
632 ctx = get_nfs_open_context(pos);
636 spin_unlock(&inode->i_lock);
640 static void nfs_file_clear_open_context(struct file *filp)
642 struct inode *inode = filp->f_path.dentry->d_inode;
643 struct nfs_open_context *ctx = nfs_file_open_context(filp);
646 filp->private_data = NULL;
647 spin_lock(&inode->i_lock);
648 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
649 spin_unlock(&inode->i_lock);
650 put_nfs_open_context_sync(ctx);
655 * These allocate and release file read/write context information.
657 int nfs_open(struct inode *inode, struct file *filp)
659 struct nfs_open_context *ctx;
660 struct rpc_cred *cred;
662 cred = rpc_lookup_cred();
664 return PTR_ERR(cred);
665 ctx = alloc_nfs_open_context(filp->f_path.mnt, filp->f_path.dentry, cred);
669 ctx->mode = filp->f_mode;
670 nfs_file_set_open_context(filp, ctx);
671 put_nfs_open_context(ctx);
675 int nfs_release(struct inode *inode, struct file *filp)
677 nfs_file_clear_open_context(filp);
682 * This function is called whenever some part of NFS notices that
683 * the cached attributes have to be refreshed.
686 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
688 int status = -ESTALE;
689 struct nfs_fattr fattr;
690 struct nfs_inode *nfsi = NFS_I(inode);
692 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
693 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
695 if (is_bad_inode(inode))
697 if (NFS_STALE(inode))
700 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
701 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
703 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
705 (long long)NFS_FILEID(inode), status);
706 if (status == -ESTALE) {
707 nfs_zap_caches(inode);
708 if (!S_ISDIR(inode->i_mode))
709 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
714 status = nfs_refresh_inode(inode, &fattr);
716 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
718 (long long)NFS_FILEID(inode), status);
722 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
723 nfs_zap_acl_cache(inode);
725 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
727 (long long)NFS_FILEID(inode));
733 int nfs_attribute_timeout(struct inode *inode)
735 struct nfs_inode *nfsi = NFS_I(inode);
737 if (nfs_have_delegation(inode, FMODE_READ))
739 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
743 * nfs_revalidate_inode - Revalidate the inode attributes
744 * @server - pointer to nfs_server struct
745 * @inode - pointer to inode struct
747 * Updates inode attribute information by retrieving the data from the server.
749 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
751 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
752 && !nfs_attribute_timeout(inode))
753 return NFS_STALE(inode) ? -ESTALE : 0;
754 return __nfs_revalidate_inode(server, inode);
757 static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
759 struct nfs_inode *nfsi = NFS_I(inode);
761 if (mapping->nrpages != 0) {
762 int ret = invalidate_inode_pages2(mapping);
766 spin_lock(&inode->i_lock);
767 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
768 if (S_ISDIR(inode->i_mode))
769 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
770 spin_unlock(&inode->i_lock);
771 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
772 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
773 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
777 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
781 mutex_lock(&inode->i_mutex);
782 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) {
783 ret = nfs_sync_mapping(mapping);
785 ret = nfs_invalidate_mapping_nolock(inode, mapping);
787 mutex_unlock(&inode->i_mutex);
792 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
793 * @inode - pointer to host inode
794 * @mapping - pointer to mapping
796 int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
798 struct nfs_inode *nfsi = NFS_I(inode);
801 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
802 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
803 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
807 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
808 ret = nfs_invalidate_mapping_nolock(inode, mapping);
814 * nfs_revalidate_mapping - Revalidate the pagecache
815 * @inode - pointer to host inode
816 * @mapping - pointer to mapping
818 * This version of the function will take the inode->i_mutex and attempt to
819 * flush out all dirty data if it needs to invalidate the page cache.
821 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
823 struct nfs_inode *nfsi = NFS_I(inode);
826 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
827 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
828 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
832 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
833 ret = nfs_invalidate_mapping(inode, mapping);
838 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
840 struct nfs_inode *nfsi = NFS_I(inode);
842 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
843 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
844 && nfsi->change_attr == fattr->pre_change_attr) {
845 nfsi->change_attr = fattr->change_attr;
846 if (S_ISDIR(inode->i_mode))
847 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
849 /* If we have atomic WCC data, we may update some attributes */
850 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
851 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
852 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
853 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
855 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
856 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
857 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
858 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
859 if (S_ISDIR(inode->i_mode))
860 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
862 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
863 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
864 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
865 && nfsi->npages == 0)
866 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
870 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
871 * @inode - pointer to inode
872 * @fattr - updated attributes
874 * Verifies the attribute cache. If we have just changed the attributes,
875 * so that fattr carries weak cache consistency data, then it may
876 * also update the ctime/mtime/change_attribute.
878 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
880 struct nfs_inode *nfsi = NFS_I(inode);
881 loff_t cur_size, new_isize;
882 unsigned long invalid = 0;
885 /* Has the inode gone and changed behind our back? */
886 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
888 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
891 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
892 nfsi->change_attr != fattr->change_attr)
893 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
895 /* Verify a few of the more important attributes */
896 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
897 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
899 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
900 cur_size = i_size_read(inode);
901 new_isize = nfs_size_to_loff_t(fattr->size);
902 if (cur_size != new_isize && nfsi->npages == 0)
903 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
906 /* Have any file permissions changed? */
907 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
908 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
909 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
910 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
911 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
912 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
914 /* Has the link count changed? */
915 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
916 invalid |= NFS_INO_INVALID_ATTR;
918 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
919 invalid |= NFS_INO_INVALID_ATIME;
922 nfsi->cache_validity |= invalid;
924 nfsi->read_cache_jiffies = fattr->time_start;
928 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
930 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
932 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
935 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
937 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
939 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
942 static atomic_long_t nfs_attr_generation_counter;
944 static unsigned long nfs_read_attr_generation_counter(void)
946 return atomic_long_read(&nfs_attr_generation_counter);
949 unsigned long nfs_inc_attr_generation_counter(void)
951 return atomic_long_inc_return(&nfs_attr_generation_counter);
954 void nfs_fattr_init(struct nfs_fattr *fattr)
957 fattr->time_start = jiffies;
958 fattr->gencount = nfs_inc_attr_generation_counter();
962 * nfs_inode_attrs_need_update - check if the inode attributes need updating
963 * @inode - pointer to inode
964 * @fattr - attributes
966 * Attempt to divine whether or not an RPC call reply carrying stale
967 * attributes got scheduled after another call carrying updated ones.
969 * To do so, the function first assumes that a more recent ctime means
970 * that the attributes in fattr are newer, however it also attempt to
971 * catch the case where ctime either didn't change, or went backwards
972 * (if someone reset the clock on the server) by looking at whether
973 * or not this RPC call was started after the inode was last updated.
974 * Note also the check for wraparound of 'attr_gencount'
976 * The function returns 'true' if it thinks the attributes in 'fattr' are
977 * more recent than the ones cached in the inode.
980 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
982 const struct nfs_inode *nfsi = NFS_I(inode);
984 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
985 nfs_ctime_need_update(inode, fattr) ||
986 nfs_size_need_update(inode, fattr) ||
987 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
990 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
992 if (nfs_inode_attrs_need_update(inode, fattr))
993 return nfs_update_inode(inode, fattr);
994 return nfs_check_inode_attributes(inode, fattr);
998 * nfs_refresh_inode - try to update the inode attribute cache
999 * @inode - pointer to inode
1000 * @fattr - updated attributes
1002 * Check that an RPC call that returned attributes has not overlapped with
1003 * other recent updates of the inode metadata, then decide whether it is
1004 * safe to do a full update of the inode attributes, or whether just to
1005 * call nfs_check_inode_attributes.
1007 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1011 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1013 spin_lock(&inode->i_lock);
1014 status = nfs_refresh_inode_locked(inode, fattr);
1015 spin_unlock(&inode->i_lock);
1019 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1021 struct nfs_inode *nfsi = NFS_I(inode);
1023 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1024 if (S_ISDIR(inode->i_mode))
1025 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1026 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1028 return nfs_refresh_inode_locked(inode, fattr);
1032 * nfs_post_op_update_inode - try to update the inode attribute cache
1033 * @inode - pointer to inode
1034 * @fattr - updated attributes
1036 * After an operation that has changed the inode metadata, mark the
1037 * attribute cache as being invalid, then try to update it.
1039 * NB: if the server didn't return any post op attributes, this
1040 * function will force the retrieval of attributes before the next
1041 * NFS request. Thus it should be used only for operations that
1042 * are expected to change one or more attributes, to avoid
1043 * unnecessary NFS requests and trips through nfs_update_inode().
1045 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1049 spin_lock(&inode->i_lock);
1050 status = nfs_post_op_update_inode_locked(inode, fattr);
1051 spin_unlock(&inode->i_lock);
1056 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1057 * @inode - pointer to inode
1058 * @fattr - updated attributes
1060 * After an operation that has changed the inode metadata, mark the
1061 * attribute cache as being invalid, then try to update it. Fake up
1062 * weak cache consistency data, if none exist.
1064 * This function is mainly designed to be used by the ->write_done() functions.
1066 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1070 spin_lock(&inode->i_lock);
1071 /* Don't do a WCC update if these attributes are already stale */
1072 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1073 !nfs_inode_attrs_need_update(inode, fattr)) {
1074 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1075 | NFS_ATTR_FATTR_PRESIZE
1076 | NFS_ATTR_FATTR_PREMTIME
1077 | NFS_ATTR_FATTR_PRECTIME);
1080 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1081 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1082 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1083 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1085 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1086 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1087 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1088 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1090 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1091 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1092 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1093 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1095 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1096 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1097 fattr->pre_size = i_size_read(inode);
1098 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1101 status = nfs_post_op_update_inode_locked(inode, fattr);
1102 spin_unlock(&inode->i_lock);
1107 * Many nfs protocol calls return the new file attributes after
1108 * an operation. Here we update the inode to reflect the state
1109 * of the server's inode.
1111 * This is a bit tricky because we have to make sure all dirty pages
1112 * have been sent off to the server before calling invalidate_inode_pages.
1113 * To make sure no other process adds more write requests while we try
1114 * our best to flush them, we make them sleep during the attribute refresh.
1116 * A very similar scenario holds for the dir cache.
1118 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1120 struct nfs_server *server;
1121 struct nfs_inode *nfsi = NFS_I(inode);
1122 loff_t cur_isize, new_isize;
1123 unsigned long invalid = 0;
1124 unsigned long now = jiffies;
1126 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1127 __func__, inode->i_sb->s_id, inode->i_ino,
1128 atomic_read(&inode->i_count), fattr->valid);
1130 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1134 * Make sure the inode's type hasn't changed.
1136 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1139 server = NFS_SERVER(inode);
1140 /* Update the fsid? */
1141 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1142 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1143 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1144 server->fsid = fattr->fsid;
1147 * Update the read time so we don't revalidate too often.
1149 nfsi->read_cache_jiffies = fattr->time_start;
1151 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) || (fattr->valid & (NFS_ATTR_FATTR_MTIME|NFS_ATTR_FATTR_CTIME)))
1152 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1153 | NFS_INO_INVALID_ATIME
1154 | NFS_INO_REVAL_PAGECACHE);
1156 /* Do atomic weak cache consistency updates */
1157 nfs_wcc_update_inode(inode, fattr);
1159 /* More cache consistency checks */
1160 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1161 if (nfsi->change_attr != fattr->change_attr) {
1162 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1163 inode->i_sb->s_id, inode->i_ino);
1164 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1165 if (S_ISDIR(inode->i_mode))
1166 nfs_force_lookup_revalidate(inode);
1167 nfsi->change_attr = fattr->change_attr;
1171 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1172 /* NFSv2/v3: Check if the mtime agrees */
1173 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1174 dprintk("NFS: mtime change on server for file %s/%ld\n",
1175 inode->i_sb->s_id, inode->i_ino);
1176 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1177 if (S_ISDIR(inode->i_mode))
1178 nfs_force_lookup_revalidate(inode);
1179 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1182 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1183 /* If ctime has changed we should definitely clear access+acl caches */
1184 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1185 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1186 /* and probably clear data for a directory too as utimes can cause
1187 * havoc with our cache.
1189 if (S_ISDIR(inode->i_mode)) {
1190 invalid |= NFS_INO_INVALID_DATA;
1191 nfs_force_lookup_revalidate(inode);
1193 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1197 /* Check if our cached file size is stale */
1198 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1199 new_isize = nfs_size_to_loff_t(fattr->size);
1200 cur_isize = i_size_read(inode);
1201 if (new_isize != cur_isize) {
1202 /* Do we perhaps have any outstanding writes, or has
1203 * the file grown beyond our last write? */
1204 if (nfsi->npages == 0 || new_isize > cur_isize) {
1205 i_size_write(inode, new_isize);
1206 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1208 dprintk("NFS: isize change on server for file %s/%ld\n",
1209 inode->i_sb->s_id, inode->i_ino);
1214 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1215 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1217 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1218 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1219 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1220 inode->i_mode = fattr->mode;
1223 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1224 if (inode->i_uid != fattr->uid) {
1225 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1226 inode->i_uid = fattr->uid;
1229 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1230 if (inode->i_gid != fattr->gid) {
1231 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1232 inode->i_gid = fattr->gid;
1236 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1237 if (inode->i_nlink != fattr->nlink) {
1238 invalid |= NFS_INO_INVALID_ATTR;
1239 if (S_ISDIR(inode->i_mode))
1240 invalid |= NFS_INO_INVALID_DATA;
1241 inode->i_nlink = fattr->nlink;
1245 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1247 * report the blocks in 512byte units
1249 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1251 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1252 inode->i_blocks = fattr->du.nfs2.blocks;
1254 /* Update attrtimeo value if we're out of the unstable period */
1255 if (invalid & NFS_INO_INVALID_ATTR) {
1256 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1257 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1258 nfsi->attrtimeo_timestamp = now;
1259 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1261 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1262 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1263 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1264 nfsi->attrtimeo_timestamp = now;
1267 invalid &= ~NFS_INO_INVALID_ATTR;
1268 /* Don't invalidate the data if we were to blame */
1269 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1270 || S_ISLNK(inode->i_mode)))
1271 invalid &= ~NFS_INO_INVALID_DATA;
1272 if (!nfs_have_delegation(inode, FMODE_READ) ||
1273 (nfsi->cache_validity & NFS_INO_REVAL_FORCED))
1274 nfsi->cache_validity |= invalid;
1275 nfsi->cache_validity &= ~NFS_INO_REVAL_FORCED;
1280 * Big trouble! The inode has become a different object.
1282 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1283 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1286 * No need to worry about unhashing the dentry, as the
1287 * lookup validation will know that the inode is bad.
1288 * (But we fall through to invalidate the caches.)
1290 nfs_invalidate_inode(inode);
1294 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1295 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1296 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1297 (long long)nfsi->fileid, (long long)fattr->fileid);
1302 #ifdef CONFIG_NFS_V4
1305 * Clean out any remaining NFSv4 state that might be left over due
1306 * to open() calls that passed nfs_atomic_lookup, but failed to call
1309 void nfs4_clear_inode(struct inode *inode)
1311 /* If we are holding a delegation, return it! */
1312 nfs_inode_return_delegation_noreclaim(inode);
1313 /* First call standard NFS clear_inode() code */
1314 nfs_clear_inode(inode);
1318 struct inode *nfs_alloc_inode(struct super_block *sb)
1320 struct nfs_inode *nfsi;
1321 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1325 nfsi->cache_validity = 0UL;
1326 #ifdef CONFIG_NFS_V3_ACL
1327 nfsi->acl_access = ERR_PTR(-EAGAIN);
1328 nfsi->acl_default = ERR_PTR(-EAGAIN);
1330 #ifdef CONFIG_NFS_V4
1331 nfsi->nfs4_acl = NULL;
1332 #endif /* CONFIG_NFS_V4 */
1333 return &nfsi->vfs_inode;
1336 void nfs_destroy_inode(struct inode *inode)
1338 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1341 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1343 #ifdef CONFIG_NFS_V4
1344 INIT_LIST_HEAD(&nfsi->open_states);
1345 nfsi->delegation = NULL;
1346 nfsi->delegation_state = 0;
1347 init_rwsem(&nfsi->rwsem);
1351 static void init_once(void *foo)
1353 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1355 inode_init_once(&nfsi->vfs_inode);
1356 INIT_LIST_HEAD(&nfsi->open_files);
1357 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1358 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1359 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1361 atomic_set(&nfsi->silly_count, 1);
1362 INIT_HLIST_HEAD(&nfsi->silly_list);
1363 init_waitqueue_head(&nfsi->waitqueue);
1364 nfs4_init_once(nfsi);
1367 static int __init nfs_init_inodecache(void)
1369 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1370 sizeof(struct nfs_inode),
1371 0, (SLAB_RECLAIM_ACCOUNT|
1374 if (nfs_inode_cachep == NULL)
1380 static void nfs_destroy_inodecache(void)
1382 kmem_cache_destroy(nfs_inode_cachep);
1385 struct workqueue_struct *nfsiod_workqueue;
1388 * start up the nfsiod workqueue
1390 static int nfsiod_start(void)
1392 struct workqueue_struct *wq;
1393 dprintk("RPC: creating workqueue nfsiod\n");
1394 wq = create_singlethread_workqueue("nfsiod");
1397 nfsiod_workqueue = wq;
1402 * Destroy the nfsiod workqueue
1404 static void nfsiod_stop(void)
1406 struct workqueue_struct *wq;
1408 wq = nfsiod_workqueue;
1411 nfsiod_workqueue = NULL;
1412 destroy_workqueue(wq);
1418 static int __init init_nfs_fs(void)
1422 err = nfsiod_start();
1426 err = nfs_fs_proc_init();
1430 err = nfs_init_nfspagecache();
1434 err = nfs_init_inodecache();
1438 err = nfs_init_readpagecache();
1442 err = nfs_init_writepagecache();
1446 err = nfs_init_directcache();
1450 #ifdef CONFIG_PROC_FS
1451 rpc_proc_register(&nfs_rpcstat);
1453 if ((err = register_nfs_fs()) != 0)
1457 #ifdef CONFIG_PROC_FS
1458 rpc_proc_unregister("nfs");
1460 nfs_destroy_directcache();
1462 nfs_destroy_writepagecache();
1464 nfs_destroy_readpagecache();
1466 nfs_destroy_inodecache();
1468 nfs_destroy_nfspagecache();
1477 static void __exit exit_nfs_fs(void)
1479 nfs_destroy_directcache();
1480 nfs_destroy_writepagecache();
1481 nfs_destroy_readpagecache();
1482 nfs_destroy_inodecache();
1483 nfs_destroy_nfspagecache();
1484 #ifdef CONFIG_PROC_FS
1485 rpc_proc_unregister("nfs");
1487 unregister_nfs_fs();
1492 /* Not quite true; I just maintain it */
1493 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1494 MODULE_LICENSE("GPL");
1495 module_param(enable_ino64, bool, 0644);
1497 module_init(init_nfs_fs)
1498 module_exit(exit_nfs_fs)