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/seq_file.h>
34 #include <linux/mount.h>
35 #include <linux/nfs_idmap.h>
36 #include <linux/vfs.h>
37 #include <linux/inet.h>
38 #include <linux/nfs_xdr.h>
40 #include <asm/system.h>
41 #include <asm/uaccess.h>
45 #include "delegation.h"
49 #include "dns_resolve.h"
51 #define NFSDBG_FACILITY NFSDBG_VFS
53 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
55 /* Default is to see 64-bit inode numbers */
56 static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
58 static void nfs_invalidate_inode(struct inode *);
59 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
61 static struct kmem_cache * nfs_inode_cachep;
63 static inline unsigned long
64 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
66 return nfs_fileid_to_ino_t(fattr->fileid);
70 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
71 * @word: long word containing the bit lock
73 int nfs_wait_bit_killable(void *word)
75 if (fatal_signal_pending(current))
82 * nfs_compat_user_ino64 - returns the user-visible inode number
83 * @fileid: 64-bit fileid
85 * This function returns a 32-bit inode number if the boot parameter
86 * nfs.enable_ino64 is zero.
88 u64 nfs_compat_user_ino64(u64 fileid)
95 if (sizeof(ino) < sizeof(fileid))
96 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
100 int nfs_write_inode(struct inode *inode, int sync)
104 ret = nfs_commit_inode(inode, sync ? FLUSH_SYNC : 0);
107 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
111 void nfs_clear_inode(struct inode *inode)
114 * The following should never happen...
116 BUG_ON(nfs_have_writebacks(inode));
117 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
118 nfs_zap_acl_cache(inode);
119 nfs_access_zap_cache(inode);
120 nfs_fscache_release_inode_cookie(inode);
124 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
126 int nfs_sync_mapping(struct address_space *mapping)
130 if (mapping->nrpages == 0)
132 unmap_mapping_range(mapping, 0, 0, 0);
133 ret = filemap_write_and_wait(mapping);
136 ret = nfs_wb_all(mapping->host);
142 * Invalidate the local caches
144 static void nfs_zap_caches_locked(struct inode *inode)
146 struct nfs_inode *nfsi = NFS_I(inode);
147 int mode = inode->i_mode;
149 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
151 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
152 nfsi->attrtimeo_timestamp = jiffies;
154 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
155 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
156 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
158 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
161 void nfs_zap_caches(struct inode *inode)
163 spin_lock(&inode->i_lock);
164 nfs_zap_caches_locked(inode);
165 spin_unlock(&inode->i_lock);
168 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
170 if (mapping->nrpages != 0) {
171 spin_lock(&inode->i_lock);
172 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
173 spin_unlock(&inode->i_lock);
177 void nfs_zap_acl_cache(struct inode *inode)
179 void (*clear_acl_cache)(struct inode *);
181 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
182 if (clear_acl_cache != NULL)
183 clear_acl_cache(inode);
184 spin_lock(&inode->i_lock);
185 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
186 spin_unlock(&inode->i_lock);
189 void nfs_invalidate_atime(struct inode *inode)
191 spin_lock(&inode->i_lock);
192 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
193 spin_unlock(&inode->i_lock);
197 * Invalidate, but do not unhash, the inode.
198 * NB: must be called with inode->i_lock held!
200 static void nfs_invalidate_inode(struct inode *inode)
202 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
203 nfs_zap_caches_locked(inode);
206 struct nfs_find_desc {
208 struct nfs_fattr *fattr;
212 * In NFSv3 we can have 64bit inode numbers. In order to support
213 * this, and re-exported directories (also seen in NFSv2)
214 * we are forced to allow 2 different inodes to have the same
218 nfs_find_actor(struct inode *inode, void *opaque)
220 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
221 struct nfs_fh *fh = desc->fh;
222 struct nfs_fattr *fattr = desc->fattr;
224 if (NFS_FILEID(inode) != fattr->fileid)
226 if (nfs_compare_fh(NFS_FH(inode), fh))
228 if (is_bad_inode(inode) || NFS_STALE(inode))
234 nfs_init_locked(struct inode *inode, void *opaque)
236 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
237 struct nfs_fattr *fattr = desc->fattr;
239 set_nfs_fileid(inode, fattr->fileid);
240 nfs_copy_fh(NFS_FH(inode), desc->fh);
244 /* Don't use READDIRPLUS on directories that we believe are too large */
245 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
248 * This is our front-end to iget that looks up inodes by file handle
249 * instead of inode number.
252 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
254 struct nfs_find_desc desc = {
258 struct inode *inode = ERR_PTR(-ENOENT);
261 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
263 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
266 hash = nfs_fattr_to_ino_t(fattr);
268 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
270 inode = ERR_PTR(-ENOMEM);
274 if (inode->i_state & I_NEW) {
275 struct nfs_inode *nfsi = NFS_I(inode);
276 unsigned long now = jiffies;
278 /* We set i_ino for the few things that still rely on it,
282 /* We can't support update_atime(), since the server will reset it */
283 inode->i_flags |= S_NOATIME|S_NOCMTIME;
284 inode->i_mode = fattr->mode;
285 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
286 && nfs_server_capable(inode, NFS_CAP_MODE))
287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
288 | NFS_INO_INVALID_ACCESS
289 | NFS_INO_INVALID_ACL;
290 /* Why so? Because we want revalidate for devices/FIFOs, and
291 * that's precisely what we have in nfs_file_inode_operations.
293 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
294 if (S_ISREG(inode->i_mode)) {
295 inode->i_fop = &nfs_file_operations;
296 inode->i_data.a_ops = &nfs_file_aops;
297 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
298 } else if (S_ISDIR(inode->i_mode)) {
299 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
300 inode->i_fop = &nfs_dir_operations;
301 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
302 && fattr->size <= NFS_LIMIT_READDIRPLUS)
303 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
304 /* Deal with crossing mountpoints */
305 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
306 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
307 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
308 inode->i_op = &nfs_referral_inode_operations;
310 inode->i_op = &nfs_mountpoint_inode_operations;
312 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
314 } else if (S_ISLNK(inode->i_mode))
315 inode->i_op = &nfs_symlink_inode_operations;
317 init_special_inode(inode, inode->i_mode, fattr->rdev);
319 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
320 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
321 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
322 nfsi->change_attr = 0;
328 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
330 nfsi->read_cache_jiffies = fattr->time_start;
331 nfsi->attr_gencount = fattr->gencount;
332 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
333 inode->i_atime = fattr->atime;
334 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
335 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
336 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
337 inode->i_mtime = fattr->mtime;
338 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
339 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
340 | NFS_INO_INVALID_DATA;
341 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
342 inode->i_ctime = fattr->ctime;
343 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
344 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
345 | NFS_INO_INVALID_ACCESS
346 | NFS_INO_INVALID_ACL;
347 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
348 nfsi->change_attr = fattr->change_attr;
349 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
350 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
351 | NFS_INO_INVALID_DATA;
352 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
353 inode->i_size = nfs_size_to_loff_t(fattr->size);
355 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
356 | NFS_INO_INVALID_DATA
357 | NFS_INO_REVAL_PAGECACHE;
358 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
359 inode->i_nlink = fattr->nlink;
360 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
361 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
362 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
363 inode->i_uid = fattr->uid;
364 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
365 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
366 | NFS_INO_INVALID_ACCESS
367 | NFS_INO_INVALID_ACL;
368 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
369 inode->i_gid = fattr->gid;
370 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
371 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
372 | NFS_INO_INVALID_ACCESS
373 | NFS_INO_INVALID_ACL;
374 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
375 inode->i_blocks = fattr->du.nfs2.blocks;
376 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
378 * report the blocks in 512byte units
380 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
382 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
383 nfsi->attrtimeo_timestamp = now;
384 nfsi->access_cache = RB_ROOT;
386 nfs_fscache_init_inode_cookie(inode);
388 unlock_new_inode(inode);
390 nfs_refresh_inode(inode, fattr);
391 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
393 (long long)NFS_FILEID(inode),
394 atomic_read(&inode->i_count));
400 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
404 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
407 nfs_setattr(struct dentry *dentry, struct iattr *attr)
409 struct inode *inode = dentry->d_inode;
410 struct nfs_fattr fattr;
413 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
415 /* skip mode change if it's just for clearing setuid/setgid */
416 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
417 attr->ia_valid &= ~ATTR_MODE;
419 if (attr->ia_valid & ATTR_SIZE) {
420 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
421 attr->ia_valid &= ~ATTR_SIZE;
424 /* Optimization: if the end result is no change, don't RPC */
425 attr->ia_valid &= NFS_VALID_ATTRS;
426 if ((attr->ia_valid & ~ATTR_FILE) == 0)
429 /* Write all dirty data */
430 if (S_ISREG(inode->i_mode)) {
431 filemap_write_and_wait(inode->i_mapping);
435 * Return any delegations if we're going to change ACLs
437 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
438 nfs_inode_return_delegation(inode);
439 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
441 nfs_refresh_inode(inode, &fattr);
446 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
447 * @inode: inode of the file used
448 * @offset: file offset to start truncating
450 * This is a copy of the common vmtruncate, but with the locking
451 * corrected to take into account the fact that NFS requires
452 * inode->i_size to be updated under the inode->i_lock.
454 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
459 err = inode_newsize_ok(inode, offset);
463 spin_lock(&inode->i_lock);
464 oldsize = inode->i_size;
465 i_size_write(inode, offset);
466 spin_unlock(&inode->i_lock);
468 truncate_pagecache(inode, oldsize, offset);
474 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
475 * @inode: pointer to struct inode
476 * @attr: pointer to struct iattr
478 * Note: we do this in the *proc.c in order to ensure that
479 * it works for things like exclusive creates too.
481 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
483 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
484 spin_lock(&inode->i_lock);
485 if ((attr->ia_valid & ATTR_MODE) != 0) {
486 int mode = attr->ia_mode & S_IALLUGO;
487 mode |= inode->i_mode & ~S_IALLUGO;
488 inode->i_mode = mode;
490 if ((attr->ia_valid & ATTR_UID) != 0)
491 inode->i_uid = attr->ia_uid;
492 if ((attr->ia_valid & ATTR_GID) != 0)
493 inode->i_gid = attr->ia_gid;
494 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
495 spin_unlock(&inode->i_lock);
497 if ((attr->ia_valid & ATTR_SIZE) != 0) {
498 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
499 nfs_vmtruncate(inode, attr->ia_size);
503 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
505 struct inode *inode = dentry->d_inode;
506 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
510 * Flush out writes to the server in order to update c/mtime.
512 * Hold the i_mutex to suspend application writes temporarily;
513 * this prevents long-running writing applications from blocking
516 if (S_ISREG(inode->i_mode)) {
517 mutex_lock(&inode->i_mutex);
518 nfs_wb_nocommit(inode);
519 mutex_unlock(&inode->i_mutex);
523 * We may force a getattr if the user cares about atime.
525 * Note that we only have to check the vfsmount flags here:
526 * - NFS always sets S_NOATIME by so checking it would give a
528 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
529 * no point in checking those.
531 if ((mnt->mnt_flags & MNT_NOATIME) ||
532 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
536 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
538 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
540 generic_fillattr(inode, stat);
541 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
547 * nfs_close_context - Common close_context() routine NFSv2/v3
548 * @ctx: pointer to context
549 * @is_sync: is this a synchronous close
551 * always ensure that the attributes are up to date if we're mounted
552 * with close-to-open semantics
554 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
557 struct nfs_server *server;
559 if (!(ctx->mode & FMODE_WRITE))
563 inode = ctx->path.dentry->d_inode;
564 if (!list_empty(&NFS_I(inode)->open_files))
566 server = NFS_SERVER(inode);
567 if (server->flags & NFS_MOUNT_NOCTO)
569 nfs_revalidate_inode(server, inode);
572 static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
574 struct nfs_open_context *ctx;
576 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
579 path_get(&ctx->path);
580 ctx->cred = get_rpccred(cred);
582 ctx->lockowner = current->files;
586 atomic_set(&ctx->count, 1);
591 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
594 atomic_inc(&ctx->count);
598 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
600 struct inode *inode = ctx->path.dentry->d_inode;
602 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
604 list_del(&ctx->list);
605 spin_unlock(&inode->i_lock);
606 NFS_PROTO(inode)->close_context(ctx, is_sync);
607 if (ctx->cred != NULL)
608 put_rpccred(ctx->cred);
609 path_put(&ctx->path);
613 void put_nfs_open_context(struct nfs_open_context *ctx)
615 __put_nfs_open_context(ctx, 0);
618 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
620 __put_nfs_open_context(ctx, 1);
624 * Ensure that mmap has a recent RPC credential for use when writing out
627 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
629 struct inode *inode = filp->f_path.dentry->d_inode;
630 struct nfs_inode *nfsi = NFS_I(inode);
632 filp->private_data = get_nfs_open_context(ctx);
633 spin_lock(&inode->i_lock);
634 list_add(&ctx->list, &nfsi->open_files);
635 spin_unlock(&inode->i_lock);
639 * Given an inode, search for an open context with the desired characteristics
641 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
643 struct nfs_inode *nfsi = NFS_I(inode);
644 struct nfs_open_context *pos, *ctx = NULL;
646 spin_lock(&inode->i_lock);
647 list_for_each_entry(pos, &nfsi->open_files, list) {
648 if (cred != NULL && pos->cred != cred)
650 if ((pos->mode & mode) == mode) {
651 ctx = get_nfs_open_context(pos);
655 spin_unlock(&inode->i_lock);
659 static void nfs_file_clear_open_context(struct file *filp)
661 struct inode *inode = filp->f_path.dentry->d_inode;
662 struct nfs_open_context *ctx = nfs_file_open_context(filp);
665 filp->private_data = NULL;
666 spin_lock(&inode->i_lock);
667 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
668 spin_unlock(&inode->i_lock);
669 put_nfs_open_context_sync(ctx);
674 * These allocate and release file read/write context information.
676 int nfs_open(struct inode *inode, struct file *filp)
678 struct nfs_open_context *ctx;
679 struct rpc_cred *cred;
681 cred = rpc_lookup_cred();
683 return PTR_ERR(cred);
684 ctx = alloc_nfs_open_context(&filp->f_path, cred);
688 ctx->mode = filp->f_mode;
689 nfs_file_set_open_context(filp, ctx);
690 put_nfs_open_context(ctx);
691 nfs_fscache_set_inode_cookie(inode, filp);
695 int nfs_release(struct inode *inode, struct file *filp)
697 nfs_file_clear_open_context(filp);
702 * This function is called whenever some part of NFS notices that
703 * the cached attributes have to be refreshed.
706 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
708 int status = -ESTALE;
709 struct nfs_fattr fattr;
710 struct nfs_inode *nfsi = NFS_I(inode);
712 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
713 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
715 if (is_bad_inode(inode))
717 if (NFS_STALE(inode))
720 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
721 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
723 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
725 (long long)NFS_FILEID(inode), status);
726 if (status == -ESTALE) {
727 nfs_zap_caches(inode);
728 if (!S_ISDIR(inode->i_mode))
729 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
734 status = nfs_refresh_inode(inode, &fattr);
736 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
738 (long long)NFS_FILEID(inode), status);
742 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
743 nfs_zap_acl_cache(inode);
745 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
747 (long long)NFS_FILEID(inode));
753 int nfs_attribute_timeout(struct inode *inode)
755 struct nfs_inode *nfsi = NFS_I(inode);
757 if (nfs_have_delegation(inode, FMODE_READ))
759 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
763 * nfs_revalidate_inode - Revalidate the inode attributes
764 * @server - pointer to nfs_server struct
765 * @inode - pointer to inode struct
767 * Updates inode attribute information by retrieving the data from the server.
769 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
771 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
772 && !nfs_attribute_timeout(inode))
773 return NFS_STALE(inode) ? -ESTALE : 0;
774 return __nfs_revalidate_inode(server, inode);
777 static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
779 struct nfs_inode *nfsi = NFS_I(inode);
781 if (mapping->nrpages != 0) {
782 int ret = invalidate_inode_pages2(mapping);
786 spin_lock(&inode->i_lock);
787 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
788 if (S_ISDIR(inode->i_mode))
789 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
790 spin_unlock(&inode->i_lock);
791 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
792 nfs_fscache_reset_inode_cookie(inode);
793 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
794 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
798 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
802 mutex_lock(&inode->i_mutex);
803 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) {
804 ret = nfs_sync_mapping(mapping);
806 ret = nfs_invalidate_mapping_nolock(inode, mapping);
808 mutex_unlock(&inode->i_mutex);
813 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
814 * @inode - pointer to host inode
815 * @mapping - pointer to mapping
817 int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
819 struct nfs_inode *nfsi = NFS_I(inode);
822 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
823 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
824 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
828 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
829 ret = nfs_invalidate_mapping_nolock(inode, mapping);
835 * nfs_revalidate_mapping - Revalidate the pagecache
836 * @inode - pointer to host inode
837 * @mapping - pointer to mapping
839 * This version of the function will take the inode->i_mutex and attempt to
840 * flush out all dirty data if it needs to invalidate the page cache.
842 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
844 struct nfs_inode *nfsi = NFS_I(inode);
847 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
848 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
849 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
853 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
854 ret = nfs_invalidate_mapping(inode, mapping);
859 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
861 struct nfs_inode *nfsi = NFS_I(inode);
863 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
864 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
865 && nfsi->change_attr == fattr->pre_change_attr) {
866 nfsi->change_attr = fattr->change_attr;
867 if (S_ISDIR(inode->i_mode))
868 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
870 /* If we have atomic WCC data, we may update some attributes */
871 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
872 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
873 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
874 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
876 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
877 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
878 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
879 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
880 if (S_ISDIR(inode->i_mode))
881 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
883 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
884 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
885 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
886 && nfsi->npages == 0)
887 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
891 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
892 * @inode - pointer to inode
893 * @fattr - updated attributes
895 * Verifies the attribute cache. If we have just changed the attributes,
896 * so that fattr carries weak cache consistency data, then it may
897 * also update the ctime/mtime/change_attribute.
899 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
901 struct nfs_inode *nfsi = NFS_I(inode);
902 loff_t cur_size, new_isize;
903 unsigned long invalid = 0;
906 /* Has the inode gone and changed behind our back? */
907 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
909 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
912 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
913 nfsi->change_attr != fattr->change_attr)
914 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
916 /* Verify a few of the more important attributes */
917 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
918 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
920 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
921 cur_size = i_size_read(inode);
922 new_isize = nfs_size_to_loff_t(fattr->size);
923 if (cur_size != new_isize && nfsi->npages == 0)
924 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
927 /* Have any file permissions changed? */
928 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
929 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
930 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
931 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
932 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
933 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
935 /* Has the link count changed? */
936 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
937 invalid |= NFS_INO_INVALID_ATTR;
939 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
940 invalid |= NFS_INO_INVALID_ATIME;
943 nfsi->cache_validity |= invalid;
945 nfsi->read_cache_jiffies = fattr->time_start;
949 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
951 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
953 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
956 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
958 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
960 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
963 static atomic_long_t nfs_attr_generation_counter;
965 static unsigned long nfs_read_attr_generation_counter(void)
967 return atomic_long_read(&nfs_attr_generation_counter);
970 unsigned long nfs_inc_attr_generation_counter(void)
972 return atomic_long_inc_return(&nfs_attr_generation_counter);
975 void nfs_fattr_init(struct nfs_fattr *fattr)
978 fattr->time_start = jiffies;
979 fattr->gencount = nfs_inc_attr_generation_counter();
983 * nfs_inode_attrs_need_update - check if the inode attributes need updating
984 * @inode - pointer to inode
985 * @fattr - attributes
987 * Attempt to divine whether or not an RPC call reply carrying stale
988 * attributes got scheduled after another call carrying updated ones.
990 * To do so, the function first assumes that a more recent ctime means
991 * that the attributes in fattr are newer, however it also attempt to
992 * catch the case where ctime either didn't change, or went backwards
993 * (if someone reset the clock on the server) by looking at whether
994 * or not this RPC call was started after the inode was last updated.
995 * Note also the check for wraparound of 'attr_gencount'
997 * The function returns 'true' if it thinks the attributes in 'fattr' are
998 * more recent than the ones cached in the inode.
1001 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1003 const struct nfs_inode *nfsi = NFS_I(inode);
1005 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1006 nfs_ctime_need_update(inode, fattr) ||
1007 nfs_size_need_update(inode, fattr) ||
1008 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1011 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1013 if (nfs_inode_attrs_need_update(inode, fattr))
1014 return nfs_update_inode(inode, fattr);
1015 return nfs_check_inode_attributes(inode, fattr);
1019 * nfs_refresh_inode - try to update the inode attribute cache
1020 * @inode - pointer to inode
1021 * @fattr - updated attributes
1023 * Check that an RPC call that returned attributes has not overlapped with
1024 * other recent updates of the inode metadata, then decide whether it is
1025 * safe to do a full update of the inode attributes, or whether just to
1026 * call nfs_check_inode_attributes.
1028 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1032 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1034 spin_lock(&inode->i_lock);
1035 status = nfs_refresh_inode_locked(inode, fattr);
1036 spin_unlock(&inode->i_lock);
1041 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1043 struct nfs_inode *nfsi = NFS_I(inode);
1045 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1046 if (S_ISDIR(inode->i_mode))
1047 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1048 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1050 return nfs_refresh_inode_locked(inode, fattr);
1054 * nfs_post_op_update_inode - try to update the inode attribute cache
1055 * @inode - pointer to inode
1056 * @fattr - updated attributes
1058 * After an operation that has changed the inode metadata, mark the
1059 * attribute cache as being invalid, then try to update it.
1061 * NB: if the server didn't return any post op attributes, this
1062 * function will force the retrieval of attributes before the next
1063 * NFS request. Thus it should be used only for operations that
1064 * are expected to change one or more attributes, to avoid
1065 * unnecessary NFS requests and trips through nfs_update_inode().
1067 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1071 spin_lock(&inode->i_lock);
1072 status = nfs_post_op_update_inode_locked(inode, fattr);
1073 spin_unlock(&inode->i_lock);
1078 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1079 * @inode - pointer to inode
1080 * @fattr - updated attributes
1082 * After an operation that has changed the inode metadata, mark the
1083 * attribute cache as being invalid, then try to update it. Fake up
1084 * weak cache consistency data, if none exist.
1086 * This function is mainly designed to be used by the ->write_done() functions.
1088 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1092 spin_lock(&inode->i_lock);
1093 /* Don't do a WCC update if these attributes are already stale */
1094 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1095 !nfs_inode_attrs_need_update(inode, fattr)) {
1096 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1097 | NFS_ATTR_FATTR_PRESIZE
1098 | NFS_ATTR_FATTR_PREMTIME
1099 | NFS_ATTR_FATTR_PRECTIME);
1102 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1103 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1104 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1105 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1107 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1108 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1109 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1110 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1112 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1113 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1114 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1115 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1117 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1118 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1119 fattr->pre_size = i_size_read(inode);
1120 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1123 status = nfs_post_op_update_inode_locked(inode, fattr);
1124 spin_unlock(&inode->i_lock);
1129 * Many nfs protocol calls return the new file attributes after
1130 * an operation. Here we update the inode to reflect the state
1131 * of the server's inode.
1133 * This is a bit tricky because we have to make sure all dirty pages
1134 * have been sent off to the server before calling invalidate_inode_pages.
1135 * To make sure no other process adds more write requests while we try
1136 * our best to flush them, we make them sleep during the attribute refresh.
1138 * A very similar scenario holds for the dir cache.
1140 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1142 struct nfs_server *server;
1143 struct nfs_inode *nfsi = NFS_I(inode);
1144 loff_t cur_isize, new_isize;
1145 unsigned long invalid = 0;
1146 unsigned long now = jiffies;
1147 unsigned long save_cache_validity;
1149 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1150 __func__, inode->i_sb->s_id, inode->i_ino,
1151 atomic_read(&inode->i_count), fattr->valid);
1153 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1157 * Make sure the inode's type hasn't changed.
1159 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1162 server = NFS_SERVER(inode);
1163 /* Update the fsid? */
1164 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1165 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1166 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1167 server->fsid = fattr->fsid;
1170 * Update the read time so we don't revalidate too often.
1172 nfsi->read_cache_jiffies = fattr->time_start;
1174 save_cache_validity = nfsi->cache_validity;
1175 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1176 | NFS_INO_INVALID_ATIME
1177 | NFS_INO_REVAL_FORCED
1178 | NFS_INO_REVAL_PAGECACHE);
1180 /* Do atomic weak cache consistency updates */
1181 nfs_wcc_update_inode(inode, fattr);
1183 /* More cache consistency checks */
1184 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1185 if (nfsi->change_attr != fattr->change_attr) {
1186 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1187 inode->i_sb->s_id, inode->i_ino);
1188 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1189 if (S_ISDIR(inode->i_mode))
1190 nfs_force_lookup_revalidate(inode);
1191 nfsi->change_attr = fattr->change_attr;
1193 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1194 invalid |= save_cache_validity;
1196 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1197 /* NFSv2/v3: Check if the mtime agrees */
1198 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1199 dprintk("NFS: mtime change on server for file %s/%ld\n",
1200 inode->i_sb->s_id, inode->i_ino);
1201 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1202 if (S_ISDIR(inode->i_mode))
1203 nfs_force_lookup_revalidate(inode);
1204 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1206 } else if (server->caps & NFS_CAP_MTIME)
1207 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1208 | NFS_INO_INVALID_DATA
1209 | NFS_INO_REVAL_PAGECACHE
1210 | NFS_INO_REVAL_FORCED);
1212 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1213 /* If ctime has changed we should definitely clear access+acl caches */
1214 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1215 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1216 /* and probably clear data for a directory too as utimes can cause
1217 * havoc with our cache.
1219 if (S_ISDIR(inode->i_mode)) {
1220 invalid |= NFS_INO_INVALID_DATA;
1221 nfs_force_lookup_revalidate(inode);
1223 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1225 } else if (server->caps & NFS_CAP_CTIME)
1226 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1227 | NFS_INO_INVALID_ACCESS
1228 | NFS_INO_INVALID_ACL
1229 | NFS_INO_REVAL_FORCED);
1231 /* Check if our cached file size is stale */
1232 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1233 new_isize = nfs_size_to_loff_t(fattr->size);
1234 cur_isize = i_size_read(inode);
1235 if (new_isize != cur_isize) {
1236 /* Do we perhaps have any outstanding writes, or has
1237 * the file grown beyond our last write? */
1238 if (nfsi->npages == 0 || new_isize > cur_isize) {
1239 i_size_write(inode, new_isize);
1240 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1242 dprintk("NFS: isize change on server for file %s/%ld\n",
1243 inode->i_sb->s_id, inode->i_ino);
1246 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1247 | NFS_INO_REVAL_PAGECACHE
1248 | NFS_INO_REVAL_FORCED);
1251 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1252 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1253 else if (server->caps & NFS_CAP_ATIME)
1254 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1255 | NFS_INO_REVAL_FORCED);
1257 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1258 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1259 umode_t newmode = inode->i_mode & S_IFMT;
1260 newmode |= fattr->mode & S_IALLUGO;
1261 inode->i_mode = newmode;
1262 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1264 } else if (server->caps & NFS_CAP_MODE)
1265 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1266 | NFS_INO_INVALID_ACCESS
1267 | NFS_INO_INVALID_ACL
1268 | NFS_INO_REVAL_FORCED);
1270 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1271 if (inode->i_uid != fattr->uid) {
1272 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1273 inode->i_uid = fattr->uid;
1275 } else if (server->caps & NFS_CAP_OWNER)
1276 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1277 | NFS_INO_INVALID_ACCESS
1278 | NFS_INO_INVALID_ACL
1279 | NFS_INO_REVAL_FORCED);
1281 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1282 if (inode->i_gid != fattr->gid) {
1283 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1284 inode->i_gid = fattr->gid;
1286 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1287 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1288 | NFS_INO_INVALID_ACCESS
1289 | NFS_INO_INVALID_ACL
1290 | NFS_INO_REVAL_FORCED);
1292 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1293 if (inode->i_nlink != fattr->nlink) {
1294 invalid |= NFS_INO_INVALID_ATTR;
1295 if (S_ISDIR(inode->i_mode))
1296 invalid |= NFS_INO_INVALID_DATA;
1297 inode->i_nlink = fattr->nlink;
1299 } else if (server->caps & NFS_CAP_NLINK)
1300 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1301 | NFS_INO_REVAL_FORCED);
1303 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1305 * report the blocks in 512byte units
1307 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1309 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1310 inode->i_blocks = fattr->du.nfs2.blocks;
1312 /* Update attrtimeo value if we're out of the unstable period */
1313 if (invalid & NFS_INO_INVALID_ATTR) {
1314 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1315 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1316 nfsi->attrtimeo_timestamp = now;
1317 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1319 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1320 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1321 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1322 nfsi->attrtimeo_timestamp = now;
1325 invalid &= ~NFS_INO_INVALID_ATTR;
1326 /* Don't invalidate the data if we were to blame */
1327 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1328 || S_ISLNK(inode->i_mode)))
1329 invalid &= ~NFS_INO_INVALID_DATA;
1330 if (!nfs_have_delegation(inode, FMODE_READ) ||
1331 (save_cache_validity & NFS_INO_REVAL_FORCED))
1332 nfsi->cache_validity |= invalid;
1337 * Big trouble! The inode has become a different object.
1339 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1340 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1343 * No need to worry about unhashing the dentry, as the
1344 * lookup validation will know that the inode is bad.
1345 * (But we fall through to invalidate the caches.)
1347 nfs_invalidate_inode(inode);
1351 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1352 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1353 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1354 (long long)nfsi->fileid, (long long)fattr->fileid);
1359 #ifdef CONFIG_NFS_V4
1362 * Clean out any remaining NFSv4 state that might be left over due
1363 * to open() calls that passed nfs_atomic_lookup, but failed to call
1366 void nfs4_clear_inode(struct inode *inode)
1368 /* If we are holding a delegation, return it! */
1369 nfs_inode_return_delegation_noreclaim(inode);
1370 /* First call standard NFS clear_inode() code */
1371 nfs_clear_inode(inode);
1375 struct inode *nfs_alloc_inode(struct super_block *sb)
1377 struct nfs_inode *nfsi;
1378 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1382 nfsi->cache_validity = 0UL;
1383 #ifdef CONFIG_NFS_V3_ACL
1384 nfsi->acl_access = ERR_PTR(-EAGAIN);
1385 nfsi->acl_default = ERR_PTR(-EAGAIN);
1387 #ifdef CONFIG_NFS_V4
1388 nfsi->nfs4_acl = NULL;
1389 #endif /* CONFIG_NFS_V4 */
1390 return &nfsi->vfs_inode;
1393 void nfs_destroy_inode(struct inode *inode)
1395 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1398 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1400 #ifdef CONFIG_NFS_V4
1401 INIT_LIST_HEAD(&nfsi->open_states);
1402 nfsi->delegation = NULL;
1403 nfsi->delegation_state = 0;
1404 init_rwsem(&nfsi->rwsem);
1408 static void init_once(void *foo)
1410 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1412 inode_init_once(&nfsi->vfs_inode);
1413 INIT_LIST_HEAD(&nfsi->open_files);
1414 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1415 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1416 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1418 atomic_set(&nfsi->silly_count, 1);
1419 INIT_HLIST_HEAD(&nfsi->silly_list);
1420 init_waitqueue_head(&nfsi->waitqueue);
1421 nfs4_init_once(nfsi);
1424 static int __init nfs_init_inodecache(void)
1426 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1427 sizeof(struct nfs_inode),
1428 0, (SLAB_RECLAIM_ACCOUNT|
1431 if (nfs_inode_cachep == NULL)
1437 static void nfs_destroy_inodecache(void)
1439 kmem_cache_destroy(nfs_inode_cachep);
1442 struct workqueue_struct *nfsiod_workqueue;
1445 * start up the nfsiod workqueue
1447 static int nfsiod_start(void)
1449 struct workqueue_struct *wq;
1450 dprintk("RPC: creating workqueue nfsiod\n");
1451 wq = create_singlethread_workqueue("nfsiod");
1454 nfsiod_workqueue = wq;
1459 * Destroy the nfsiod workqueue
1461 static void nfsiod_stop(void)
1463 struct workqueue_struct *wq;
1465 wq = nfsiod_workqueue;
1468 nfsiod_workqueue = NULL;
1469 destroy_workqueue(wq);
1475 static int __init init_nfs_fs(void)
1479 err = nfs_dns_resolver_init();
1483 err = nfs_fscache_register();
1487 err = nfsiod_start();
1491 err = nfs_fs_proc_init();
1495 err = nfs_init_nfspagecache();
1499 err = nfs_init_inodecache();
1503 err = nfs_init_readpagecache();
1507 err = nfs_init_writepagecache();
1511 err = nfs_init_directcache();
1515 #ifdef CONFIG_PROC_FS
1516 rpc_proc_register(&nfs_rpcstat);
1518 if ((err = register_nfs_fs()) != 0)
1522 #ifdef CONFIG_PROC_FS
1523 rpc_proc_unregister("nfs");
1525 nfs_destroy_directcache();
1527 nfs_destroy_writepagecache();
1529 nfs_destroy_readpagecache();
1531 nfs_destroy_inodecache();
1533 nfs_destroy_nfspagecache();
1539 nfs_fscache_unregister();
1541 nfs_dns_resolver_destroy();
1546 static void __exit exit_nfs_fs(void)
1548 nfs_destroy_directcache();
1549 nfs_destroy_writepagecache();
1550 nfs_destroy_readpagecache();
1551 nfs_destroy_inodecache();
1552 nfs_destroy_nfspagecache();
1553 nfs_fscache_unregister();
1554 nfs_dns_resolver_destroy();
1555 #ifdef CONFIG_PROC_FS
1556 rpc_proc_unregister("nfs");
1558 unregister_nfs_fs();
1563 /* Not quite true; I just maintain it */
1564 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1565 MODULE_LICENSE("GPL");
1566 module_param(enable_ino64, bool, 0644);
1568 module_init(init_nfs_fs)
1569 module_exit(exit_nfs_fs)