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, struct writeback_control *wbc)
104 ret = nfs_commit_inode(inode,
105 wbc->sync_mode == WB_SYNC_ALL ? FLUSH_SYNC : 0);
108 __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
112 void nfs_clear_inode(struct inode *inode)
115 * The following should never happen...
117 BUG_ON(nfs_have_writebacks(inode));
118 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
119 nfs_zap_acl_cache(inode);
120 nfs_access_zap_cache(inode);
121 nfs_fscache_release_inode_cookie(inode);
125 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
127 int nfs_sync_mapping(struct address_space *mapping)
131 if (mapping->nrpages == 0)
133 unmap_mapping_range(mapping, 0, 0, 0);
134 ret = filemap_write_and_wait(mapping);
137 ret = nfs_wb_all(mapping->host);
143 * Invalidate the local caches
145 static void nfs_zap_caches_locked(struct inode *inode)
147 struct nfs_inode *nfsi = NFS_I(inode);
148 int mode = inode->i_mode;
150 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
152 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
153 nfsi->attrtimeo_timestamp = jiffies;
155 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
156 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
157 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
159 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
162 void nfs_zap_caches(struct inode *inode)
164 spin_lock(&inode->i_lock);
165 nfs_zap_caches_locked(inode);
166 spin_unlock(&inode->i_lock);
169 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
171 if (mapping->nrpages != 0) {
172 spin_lock(&inode->i_lock);
173 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
174 spin_unlock(&inode->i_lock);
178 void nfs_zap_acl_cache(struct inode *inode)
180 void (*clear_acl_cache)(struct inode *);
182 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
183 if (clear_acl_cache != NULL)
184 clear_acl_cache(inode);
185 spin_lock(&inode->i_lock);
186 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
187 spin_unlock(&inode->i_lock);
190 void nfs_invalidate_atime(struct inode *inode)
192 spin_lock(&inode->i_lock);
193 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
194 spin_unlock(&inode->i_lock);
198 * Invalidate, but do not unhash, the inode.
199 * NB: must be called with inode->i_lock held!
201 static void nfs_invalidate_inode(struct inode *inode)
203 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
204 nfs_zap_caches_locked(inode);
207 struct nfs_find_desc {
209 struct nfs_fattr *fattr;
213 * In NFSv3 we can have 64bit inode numbers. In order to support
214 * this, and re-exported directories (also seen in NFSv2)
215 * we are forced to allow 2 different inodes to have the same
219 nfs_find_actor(struct inode *inode, void *opaque)
221 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
222 struct nfs_fh *fh = desc->fh;
223 struct nfs_fattr *fattr = desc->fattr;
225 if (NFS_FILEID(inode) != fattr->fileid)
227 if (nfs_compare_fh(NFS_FH(inode), fh))
229 if (is_bad_inode(inode) || NFS_STALE(inode))
235 nfs_init_locked(struct inode *inode, void *opaque)
237 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
238 struct nfs_fattr *fattr = desc->fattr;
240 set_nfs_fileid(inode, fattr->fileid);
241 nfs_copy_fh(NFS_FH(inode), desc->fh);
245 /* Don't use READDIRPLUS on directories that we believe are too large */
246 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
249 * This is our front-end to iget that looks up inodes by file handle
250 * instead of inode number.
253 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
255 struct nfs_find_desc desc = {
259 struct inode *inode = ERR_PTR(-ENOENT);
262 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
264 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
267 hash = nfs_fattr_to_ino_t(fattr);
269 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
271 inode = ERR_PTR(-ENOMEM);
275 if (inode->i_state & I_NEW) {
276 struct nfs_inode *nfsi = NFS_I(inode);
277 unsigned long now = jiffies;
279 /* We set i_ino for the few things that still rely on it,
283 /* We can't support update_atime(), since the server will reset it */
284 inode->i_flags |= S_NOATIME|S_NOCMTIME;
285 inode->i_mode = fattr->mode;
286 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
287 && nfs_server_capable(inode, NFS_CAP_MODE))
288 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
289 | NFS_INO_INVALID_ACCESS
290 | NFS_INO_INVALID_ACL;
291 /* Why so? Because we want revalidate for devices/FIFOs, and
292 * that's precisely what we have in nfs_file_inode_operations.
294 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
295 if (S_ISREG(inode->i_mode)) {
296 inode->i_fop = &nfs_file_operations;
297 inode->i_data.a_ops = &nfs_file_aops;
298 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
299 } else if (S_ISDIR(inode->i_mode)) {
300 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
301 inode->i_fop = &nfs_dir_operations;
302 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
303 && fattr->size <= NFS_LIMIT_READDIRPLUS)
304 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
305 /* Deal with crossing mountpoints */
306 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
307 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
308 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
309 inode->i_op = &nfs_referral_inode_operations;
311 inode->i_op = &nfs_mountpoint_inode_operations;
313 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
315 } else if (S_ISLNK(inode->i_mode))
316 inode->i_op = &nfs_symlink_inode_operations;
318 init_special_inode(inode, inode->i_mode, fattr->rdev);
320 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
321 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
322 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
323 nfsi->change_attr = 0;
329 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
331 nfsi->read_cache_jiffies = fattr->time_start;
332 nfsi->attr_gencount = fattr->gencount;
333 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
334 inode->i_atime = fattr->atime;
335 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
336 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
337 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
338 inode->i_mtime = fattr->mtime;
339 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
340 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
341 | NFS_INO_INVALID_DATA;
342 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
343 inode->i_ctime = fattr->ctime;
344 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
345 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
346 | NFS_INO_INVALID_ACCESS
347 | NFS_INO_INVALID_ACL;
348 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
349 nfsi->change_attr = fattr->change_attr;
350 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
351 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
352 | NFS_INO_INVALID_DATA;
353 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
354 inode->i_size = nfs_size_to_loff_t(fattr->size);
356 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
357 | NFS_INO_INVALID_DATA
358 | NFS_INO_REVAL_PAGECACHE;
359 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
360 inode->i_nlink = fattr->nlink;
361 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
362 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
363 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
364 inode->i_uid = fattr->uid;
365 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
366 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
367 | NFS_INO_INVALID_ACCESS
368 | NFS_INO_INVALID_ACL;
369 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
370 inode->i_gid = fattr->gid;
371 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
372 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
373 | NFS_INO_INVALID_ACCESS
374 | NFS_INO_INVALID_ACL;
375 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
376 inode->i_blocks = fattr->du.nfs2.blocks;
377 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
379 * report the blocks in 512byte units
381 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
383 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
384 nfsi->attrtimeo_timestamp = now;
385 nfsi->access_cache = RB_ROOT;
387 nfs_fscache_init_inode_cookie(inode);
389 unlock_new_inode(inode);
391 nfs_refresh_inode(inode, fattr);
392 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
394 (long long)NFS_FILEID(inode),
395 atomic_read(&inode->i_count));
401 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
405 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
408 nfs_setattr(struct dentry *dentry, struct iattr *attr)
410 struct inode *inode = dentry->d_inode;
411 struct nfs_fattr fattr;
414 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
416 /* skip mode change if it's just for clearing setuid/setgid */
417 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
418 attr->ia_valid &= ~ATTR_MODE;
420 if (attr->ia_valid & ATTR_SIZE) {
421 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
422 attr->ia_valid &= ~ATTR_SIZE;
425 /* Optimization: if the end result is no change, don't RPC */
426 attr->ia_valid &= NFS_VALID_ATTRS;
427 if ((attr->ia_valid & ~ATTR_FILE) == 0)
430 /* Write all dirty data */
431 if (S_ISREG(inode->i_mode)) {
432 filemap_write_and_wait(inode->i_mapping);
436 * Return any delegations if we're going to change ACLs
438 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
439 nfs_inode_return_delegation(inode);
440 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
442 nfs_refresh_inode(inode, &fattr);
447 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
448 * @inode: inode of the file used
449 * @offset: file offset to start truncating
451 * This is a copy of the common vmtruncate, but with the locking
452 * corrected to take into account the fact that NFS requires
453 * inode->i_size to be updated under the inode->i_lock.
455 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
460 err = inode_newsize_ok(inode, offset);
464 spin_lock(&inode->i_lock);
465 oldsize = inode->i_size;
466 i_size_write(inode, offset);
467 spin_unlock(&inode->i_lock);
469 truncate_pagecache(inode, oldsize, offset);
475 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
476 * @inode: pointer to struct inode
477 * @attr: pointer to struct iattr
479 * Note: we do this in the *proc.c in order to ensure that
480 * it works for things like exclusive creates too.
482 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
484 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
485 spin_lock(&inode->i_lock);
486 if ((attr->ia_valid & ATTR_MODE) != 0) {
487 int mode = attr->ia_mode & S_IALLUGO;
488 mode |= inode->i_mode & ~S_IALLUGO;
489 inode->i_mode = mode;
491 if ((attr->ia_valid & ATTR_UID) != 0)
492 inode->i_uid = attr->ia_uid;
493 if ((attr->ia_valid & ATTR_GID) != 0)
494 inode->i_gid = attr->ia_gid;
495 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
496 spin_unlock(&inode->i_lock);
498 if ((attr->ia_valid & ATTR_SIZE) != 0) {
499 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
500 nfs_vmtruncate(inode, attr->ia_size);
504 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
506 struct inode *inode = dentry->d_inode;
507 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
511 * Flush out writes to the server in order to update c/mtime.
513 * Hold the i_mutex to suspend application writes temporarily;
514 * this prevents long-running writing applications from blocking
517 if (S_ISREG(inode->i_mode)) {
518 mutex_lock(&inode->i_mutex);
519 nfs_wb_nocommit(inode);
520 mutex_unlock(&inode->i_mutex);
524 * We may force a getattr if the user cares about atime.
526 * Note that we only have to check the vfsmount flags here:
527 * - NFS always sets S_NOATIME by so checking it would give a
529 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
530 * no point in checking those.
532 if ((mnt->mnt_flags & MNT_NOATIME) ||
533 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
537 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
539 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
541 generic_fillattr(inode, stat);
542 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
548 * nfs_close_context - Common close_context() routine NFSv2/v3
549 * @ctx: pointer to context
550 * @is_sync: is this a synchronous close
552 * always ensure that the attributes are up to date if we're mounted
553 * with close-to-open semantics
555 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
558 struct nfs_server *server;
560 if (!(ctx->mode & FMODE_WRITE))
564 inode = ctx->path.dentry->d_inode;
565 if (!list_empty(&NFS_I(inode)->open_files))
567 server = NFS_SERVER(inode);
568 if (server->flags & NFS_MOUNT_NOCTO)
570 nfs_revalidate_inode(server, inode);
573 static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
575 struct nfs_open_context *ctx;
577 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
580 path_get(&ctx->path);
581 ctx->cred = get_rpccred(cred);
583 ctx->lockowner = current->files;
587 atomic_set(&ctx->count, 1);
592 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
595 atomic_inc(&ctx->count);
599 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
601 struct inode *inode = ctx->path.dentry->d_inode;
603 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
605 list_del(&ctx->list);
606 spin_unlock(&inode->i_lock);
607 NFS_PROTO(inode)->close_context(ctx, is_sync);
608 if (ctx->cred != NULL)
609 put_rpccred(ctx->cred);
610 path_put(&ctx->path);
614 void put_nfs_open_context(struct nfs_open_context *ctx)
616 __put_nfs_open_context(ctx, 0);
619 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
621 __put_nfs_open_context(ctx, 1);
625 * Ensure that mmap has a recent RPC credential for use when writing out
628 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
630 struct inode *inode = filp->f_path.dentry->d_inode;
631 struct nfs_inode *nfsi = NFS_I(inode);
633 filp->private_data = get_nfs_open_context(ctx);
634 spin_lock(&inode->i_lock);
635 list_add(&ctx->list, &nfsi->open_files);
636 spin_unlock(&inode->i_lock);
640 * Given an inode, search for an open context with the desired characteristics
642 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
644 struct nfs_inode *nfsi = NFS_I(inode);
645 struct nfs_open_context *pos, *ctx = NULL;
647 spin_lock(&inode->i_lock);
648 list_for_each_entry(pos, &nfsi->open_files, list) {
649 if (cred != NULL && pos->cred != cred)
651 if ((pos->mode & mode) == mode) {
652 ctx = get_nfs_open_context(pos);
656 spin_unlock(&inode->i_lock);
660 static void nfs_file_clear_open_context(struct file *filp)
662 struct inode *inode = filp->f_path.dentry->d_inode;
663 struct nfs_open_context *ctx = nfs_file_open_context(filp);
666 filp->private_data = NULL;
667 spin_lock(&inode->i_lock);
668 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
669 spin_unlock(&inode->i_lock);
670 put_nfs_open_context_sync(ctx);
675 * These allocate and release file read/write context information.
677 int nfs_open(struct inode *inode, struct file *filp)
679 struct nfs_open_context *ctx;
680 struct rpc_cred *cred;
682 cred = rpc_lookup_cred();
684 return PTR_ERR(cred);
685 ctx = alloc_nfs_open_context(&filp->f_path, cred);
689 ctx->mode = filp->f_mode;
690 nfs_file_set_open_context(filp, ctx);
691 put_nfs_open_context(ctx);
692 nfs_fscache_set_inode_cookie(inode, filp);
696 int nfs_release(struct inode *inode, struct file *filp)
698 nfs_file_clear_open_context(filp);
703 * This function is called whenever some part of NFS notices that
704 * the cached attributes have to be refreshed.
707 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
709 int status = -ESTALE;
710 struct nfs_fattr fattr;
711 struct nfs_inode *nfsi = NFS_I(inode);
713 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
714 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
716 if (is_bad_inode(inode))
718 if (NFS_STALE(inode))
721 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
722 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
724 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
726 (long long)NFS_FILEID(inode), status);
727 if (status == -ESTALE) {
728 nfs_zap_caches(inode);
729 if (!S_ISDIR(inode->i_mode))
730 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
735 status = nfs_refresh_inode(inode, &fattr);
737 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
739 (long long)NFS_FILEID(inode), status);
743 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
744 nfs_zap_acl_cache(inode);
746 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
748 (long long)NFS_FILEID(inode));
754 int nfs_attribute_timeout(struct inode *inode)
756 struct nfs_inode *nfsi = NFS_I(inode);
758 if (nfs_have_delegation(inode, FMODE_READ))
760 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
764 * nfs_revalidate_inode - Revalidate the inode attributes
765 * @server - pointer to nfs_server struct
766 * @inode - pointer to inode struct
768 * Updates inode attribute information by retrieving the data from the server.
770 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
772 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
773 && !nfs_attribute_timeout(inode))
774 return NFS_STALE(inode) ? -ESTALE : 0;
775 return __nfs_revalidate_inode(server, inode);
778 static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
780 struct nfs_inode *nfsi = NFS_I(inode);
782 if (mapping->nrpages != 0) {
783 int ret = invalidate_inode_pages2(mapping);
787 spin_lock(&inode->i_lock);
788 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
789 if (S_ISDIR(inode->i_mode))
790 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
791 spin_unlock(&inode->i_lock);
792 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
793 nfs_fscache_reset_inode_cookie(inode);
794 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
795 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
799 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
803 mutex_lock(&inode->i_mutex);
804 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) {
805 ret = nfs_sync_mapping(mapping);
807 ret = nfs_invalidate_mapping_nolock(inode, mapping);
809 mutex_unlock(&inode->i_mutex);
814 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
815 * @inode - pointer to host inode
816 * @mapping - pointer to mapping
818 int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
820 struct nfs_inode *nfsi = NFS_I(inode);
823 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
824 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
825 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
829 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
830 ret = nfs_invalidate_mapping_nolock(inode, mapping);
836 * nfs_revalidate_mapping - Revalidate the pagecache
837 * @inode - pointer to host inode
838 * @mapping - pointer to mapping
840 * This version of the function will take the inode->i_mutex and attempt to
841 * flush out all dirty data if it needs to invalidate the page cache.
843 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
845 struct nfs_inode *nfsi = NFS_I(inode);
848 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
849 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
850 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
854 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
855 ret = nfs_invalidate_mapping(inode, mapping);
860 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
862 struct nfs_inode *nfsi = NFS_I(inode);
864 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
865 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
866 && nfsi->change_attr == fattr->pre_change_attr) {
867 nfsi->change_attr = fattr->change_attr;
868 if (S_ISDIR(inode->i_mode))
869 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
871 /* If we have atomic WCC data, we may update some attributes */
872 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
873 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
874 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
875 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
877 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
878 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
879 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
880 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
881 if (S_ISDIR(inode->i_mode))
882 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
884 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
885 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
886 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
887 && nfsi->npages == 0)
888 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
892 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
893 * @inode - pointer to inode
894 * @fattr - updated attributes
896 * Verifies the attribute cache. If we have just changed the attributes,
897 * so that fattr carries weak cache consistency data, then it may
898 * also update the ctime/mtime/change_attribute.
900 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
902 struct nfs_inode *nfsi = NFS_I(inode);
903 loff_t cur_size, new_isize;
904 unsigned long invalid = 0;
907 /* Has the inode gone and changed behind our back? */
908 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
910 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
913 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
914 nfsi->change_attr != fattr->change_attr)
915 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
917 /* Verify a few of the more important attributes */
918 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
919 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
921 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
922 cur_size = i_size_read(inode);
923 new_isize = nfs_size_to_loff_t(fattr->size);
924 if (cur_size != new_isize && nfsi->npages == 0)
925 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
928 /* Have any file permissions changed? */
929 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
930 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
931 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
932 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
933 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
934 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
936 /* Has the link count changed? */
937 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
938 invalid |= NFS_INO_INVALID_ATTR;
940 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
941 invalid |= NFS_INO_INVALID_ATIME;
944 nfsi->cache_validity |= invalid;
946 nfsi->read_cache_jiffies = fattr->time_start;
950 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
952 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
954 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
957 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
959 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
961 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
964 static atomic_long_t nfs_attr_generation_counter;
966 static unsigned long nfs_read_attr_generation_counter(void)
968 return atomic_long_read(&nfs_attr_generation_counter);
971 unsigned long nfs_inc_attr_generation_counter(void)
973 return atomic_long_inc_return(&nfs_attr_generation_counter);
976 void nfs_fattr_init(struct nfs_fattr *fattr)
979 fattr->time_start = jiffies;
980 fattr->gencount = nfs_inc_attr_generation_counter();
984 * nfs_inode_attrs_need_update - check if the inode attributes need updating
985 * @inode - pointer to inode
986 * @fattr - attributes
988 * Attempt to divine whether or not an RPC call reply carrying stale
989 * attributes got scheduled after another call carrying updated ones.
991 * To do so, the function first assumes that a more recent ctime means
992 * that the attributes in fattr are newer, however it also attempt to
993 * catch the case where ctime either didn't change, or went backwards
994 * (if someone reset the clock on the server) by looking at whether
995 * or not this RPC call was started after the inode was last updated.
996 * Note also the check for wraparound of 'attr_gencount'
998 * The function returns 'true' if it thinks the attributes in 'fattr' are
999 * more recent than the ones cached in the inode.
1002 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1004 const struct nfs_inode *nfsi = NFS_I(inode);
1006 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1007 nfs_ctime_need_update(inode, fattr) ||
1008 nfs_size_need_update(inode, fattr) ||
1009 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1012 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1014 if (nfs_inode_attrs_need_update(inode, fattr))
1015 return nfs_update_inode(inode, fattr);
1016 return nfs_check_inode_attributes(inode, fattr);
1020 * nfs_refresh_inode - try to update the inode attribute cache
1021 * @inode - pointer to inode
1022 * @fattr - updated attributes
1024 * Check that an RPC call that returned attributes has not overlapped with
1025 * other recent updates of the inode metadata, then decide whether it is
1026 * safe to do a full update of the inode attributes, or whether just to
1027 * call nfs_check_inode_attributes.
1029 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1033 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1035 spin_lock(&inode->i_lock);
1036 status = nfs_refresh_inode_locked(inode, fattr);
1037 spin_unlock(&inode->i_lock);
1042 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1044 struct nfs_inode *nfsi = NFS_I(inode);
1046 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1047 if (S_ISDIR(inode->i_mode))
1048 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1049 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1051 return nfs_refresh_inode_locked(inode, fattr);
1055 * nfs_post_op_update_inode - try to update the inode attribute cache
1056 * @inode - pointer to inode
1057 * @fattr - updated attributes
1059 * After an operation that has changed the inode metadata, mark the
1060 * attribute cache as being invalid, then try to update it.
1062 * NB: if the server didn't return any post op attributes, this
1063 * function will force the retrieval of attributes before the next
1064 * NFS request. Thus it should be used only for operations that
1065 * are expected to change one or more attributes, to avoid
1066 * unnecessary NFS requests and trips through nfs_update_inode().
1068 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1072 spin_lock(&inode->i_lock);
1073 status = nfs_post_op_update_inode_locked(inode, fattr);
1074 spin_unlock(&inode->i_lock);
1079 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1080 * @inode - pointer to inode
1081 * @fattr - updated attributes
1083 * After an operation that has changed the inode metadata, mark the
1084 * attribute cache as being invalid, then try to update it. Fake up
1085 * weak cache consistency data, if none exist.
1087 * This function is mainly designed to be used by the ->write_done() functions.
1089 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1093 spin_lock(&inode->i_lock);
1094 /* Don't do a WCC update if these attributes are already stale */
1095 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1096 !nfs_inode_attrs_need_update(inode, fattr)) {
1097 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1098 | NFS_ATTR_FATTR_PRESIZE
1099 | NFS_ATTR_FATTR_PREMTIME
1100 | NFS_ATTR_FATTR_PRECTIME);
1103 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1104 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1105 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1106 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1108 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1109 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1110 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1111 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1113 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1114 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1115 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1116 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1118 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1119 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1120 fattr->pre_size = i_size_read(inode);
1121 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1124 status = nfs_post_op_update_inode_locked(inode, fattr);
1125 spin_unlock(&inode->i_lock);
1130 * Many nfs protocol calls return the new file attributes after
1131 * an operation. Here we update the inode to reflect the state
1132 * of the server's inode.
1134 * This is a bit tricky because we have to make sure all dirty pages
1135 * have been sent off to the server before calling invalidate_inode_pages.
1136 * To make sure no other process adds more write requests while we try
1137 * our best to flush them, we make them sleep during the attribute refresh.
1139 * A very similar scenario holds for the dir cache.
1141 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1143 struct nfs_server *server;
1144 struct nfs_inode *nfsi = NFS_I(inode);
1145 loff_t cur_isize, new_isize;
1146 unsigned long invalid = 0;
1147 unsigned long now = jiffies;
1148 unsigned long save_cache_validity;
1150 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1151 __func__, inode->i_sb->s_id, inode->i_ino,
1152 atomic_read(&inode->i_count), fattr->valid);
1154 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1158 * Make sure the inode's type hasn't changed.
1160 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1163 server = NFS_SERVER(inode);
1164 /* Update the fsid? */
1165 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1166 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1167 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1168 server->fsid = fattr->fsid;
1171 * Update the read time so we don't revalidate too often.
1173 nfsi->read_cache_jiffies = fattr->time_start;
1175 save_cache_validity = nfsi->cache_validity;
1176 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1177 | NFS_INO_INVALID_ATIME
1178 | NFS_INO_REVAL_FORCED
1179 | NFS_INO_REVAL_PAGECACHE);
1181 /* Do atomic weak cache consistency updates */
1182 nfs_wcc_update_inode(inode, fattr);
1184 /* More cache consistency checks */
1185 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1186 if (nfsi->change_attr != fattr->change_attr) {
1187 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1188 inode->i_sb->s_id, inode->i_ino);
1189 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1190 if (S_ISDIR(inode->i_mode))
1191 nfs_force_lookup_revalidate(inode);
1192 nfsi->change_attr = fattr->change_attr;
1194 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1195 invalid |= save_cache_validity;
1197 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1198 /* NFSv2/v3: Check if the mtime agrees */
1199 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1200 dprintk("NFS: mtime change on server for file %s/%ld\n",
1201 inode->i_sb->s_id, inode->i_ino);
1202 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1203 if (S_ISDIR(inode->i_mode))
1204 nfs_force_lookup_revalidate(inode);
1205 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1207 } else if (server->caps & NFS_CAP_MTIME)
1208 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1209 | NFS_INO_INVALID_DATA
1210 | NFS_INO_REVAL_PAGECACHE
1211 | NFS_INO_REVAL_FORCED);
1213 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1214 /* If ctime has changed we should definitely clear access+acl caches */
1215 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1216 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1217 /* and probably clear data for a directory too as utimes can cause
1218 * havoc with our cache.
1220 if (S_ISDIR(inode->i_mode)) {
1221 invalid |= NFS_INO_INVALID_DATA;
1222 nfs_force_lookup_revalidate(inode);
1224 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1226 } else if (server->caps & NFS_CAP_CTIME)
1227 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1228 | NFS_INO_INVALID_ACCESS
1229 | NFS_INO_INVALID_ACL
1230 | NFS_INO_REVAL_FORCED);
1232 /* Check if our cached file size is stale */
1233 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1234 new_isize = nfs_size_to_loff_t(fattr->size);
1235 cur_isize = i_size_read(inode);
1236 if (new_isize != cur_isize) {
1237 /* Do we perhaps have any outstanding writes, or has
1238 * the file grown beyond our last write? */
1239 if (nfsi->npages == 0 || new_isize > cur_isize) {
1240 i_size_write(inode, new_isize);
1241 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1243 dprintk("NFS: isize change on server for file %s/%ld\n",
1244 inode->i_sb->s_id, inode->i_ino);
1247 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1248 | NFS_INO_REVAL_PAGECACHE
1249 | NFS_INO_REVAL_FORCED);
1252 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1253 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1254 else if (server->caps & NFS_CAP_ATIME)
1255 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1256 | NFS_INO_REVAL_FORCED);
1258 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1259 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1260 umode_t newmode = inode->i_mode & S_IFMT;
1261 newmode |= fattr->mode & S_IALLUGO;
1262 inode->i_mode = newmode;
1263 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1265 } else if (server->caps & NFS_CAP_MODE)
1266 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1267 | NFS_INO_INVALID_ACCESS
1268 | NFS_INO_INVALID_ACL
1269 | NFS_INO_REVAL_FORCED);
1271 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1272 if (inode->i_uid != fattr->uid) {
1273 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1274 inode->i_uid = fattr->uid;
1276 } else if (server->caps & NFS_CAP_OWNER)
1277 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1278 | NFS_INO_INVALID_ACCESS
1279 | NFS_INO_INVALID_ACL
1280 | NFS_INO_REVAL_FORCED);
1282 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1283 if (inode->i_gid != fattr->gid) {
1284 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1285 inode->i_gid = fattr->gid;
1287 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1288 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1289 | NFS_INO_INVALID_ACCESS
1290 | NFS_INO_INVALID_ACL
1291 | NFS_INO_REVAL_FORCED);
1293 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1294 if (inode->i_nlink != fattr->nlink) {
1295 invalid |= NFS_INO_INVALID_ATTR;
1296 if (S_ISDIR(inode->i_mode))
1297 invalid |= NFS_INO_INVALID_DATA;
1298 inode->i_nlink = fattr->nlink;
1300 } else if (server->caps & NFS_CAP_NLINK)
1301 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1302 | NFS_INO_REVAL_FORCED);
1304 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1306 * report the blocks in 512byte units
1308 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1310 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1311 inode->i_blocks = fattr->du.nfs2.blocks;
1313 /* Update attrtimeo value if we're out of the unstable period */
1314 if (invalid & NFS_INO_INVALID_ATTR) {
1315 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1316 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1317 nfsi->attrtimeo_timestamp = now;
1318 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1320 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1321 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1322 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1323 nfsi->attrtimeo_timestamp = now;
1326 invalid &= ~NFS_INO_INVALID_ATTR;
1327 /* Don't invalidate the data if we were to blame */
1328 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1329 || S_ISLNK(inode->i_mode)))
1330 invalid &= ~NFS_INO_INVALID_DATA;
1331 if (!nfs_have_delegation(inode, FMODE_READ) ||
1332 (save_cache_validity & NFS_INO_REVAL_FORCED))
1333 nfsi->cache_validity |= invalid;
1338 * Big trouble! The inode has become a different object.
1340 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1341 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1344 * No need to worry about unhashing the dentry, as the
1345 * lookup validation will know that the inode is bad.
1346 * (But we fall through to invalidate the caches.)
1348 nfs_invalidate_inode(inode);
1352 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1353 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1354 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1355 (long long)nfsi->fileid, (long long)fattr->fileid);
1360 #ifdef CONFIG_NFS_V4
1363 * Clean out any remaining NFSv4 state that might be left over due
1364 * to open() calls that passed nfs_atomic_lookup, but failed to call
1367 void nfs4_clear_inode(struct inode *inode)
1369 /* If we are holding a delegation, return it! */
1370 nfs_inode_return_delegation_noreclaim(inode);
1371 /* First call standard NFS clear_inode() code */
1372 nfs_clear_inode(inode);
1376 struct inode *nfs_alloc_inode(struct super_block *sb)
1378 struct nfs_inode *nfsi;
1379 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1383 nfsi->cache_validity = 0UL;
1384 #ifdef CONFIG_NFS_V3_ACL
1385 nfsi->acl_access = ERR_PTR(-EAGAIN);
1386 nfsi->acl_default = ERR_PTR(-EAGAIN);
1388 #ifdef CONFIG_NFS_V4
1389 nfsi->nfs4_acl = NULL;
1390 #endif /* CONFIG_NFS_V4 */
1391 return &nfsi->vfs_inode;
1394 void nfs_destroy_inode(struct inode *inode)
1396 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1399 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1401 #ifdef CONFIG_NFS_V4
1402 INIT_LIST_HEAD(&nfsi->open_states);
1403 nfsi->delegation = NULL;
1404 nfsi->delegation_state = 0;
1405 init_rwsem(&nfsi->rwsem);
1409 static void init_once(void *foo)
1411 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1413 inode_init_once(&nfsi->vfs_inode);
1414 INIT_LIST_HEAD(&nfsi->open_files);
1415 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1416 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1417 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1419 atomic_set(&nfsi->silly_count, 1);
1420 INIT_HLIST_HEAD(&nfsi->silly_list);
1421 init_waitqueue_head(&nfsi->waitqueue);
1422 nfs4_init_once(nfsi);
1425 static int __init nfs_init_inodecache(void)
1427 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1428 sizeof(struct nfs_inode),
1429 0, (SLAB_RECLAIM_ACCOUNT|
1432 if (nfs_inode_cachep == NULL)
1438 static void nfs_destroy_inodecache(void)
1440 kmem_cache_destroy(nfs_inode_cachep);
1443 struct workqueue_struct *nfsiod_workqueue;
1446 * start up the nfsiod workqueue
1448 static int nfsiod_start(void)
1450 struct workqueue_struct *wq;
1451 dprintk("RPC: creating workqueue nfsiod\n");
1452 wq = create_singlethread_workqueue("nfsiod");
1455 nfsiod_workqueue = wq;
1460 * Destroy the nfsiod workqueue
1462 static void nfsiod_stop(void)
1464 struct workqueue_struct *wq;
1466 wq = nfsiod_workqueue;
1469 nfsiod_workqueue = NULL;
1470 destroy_workqueue(wq);
1476 static int __init init_nfs_fs(void)
1480 err = nfs_dns_resolver_init();
1484 err = nfs_fscache_register();
1488 err = nfsiod_start();
1492 err = nfs_fs_proc_init();
1496 err = nfs_init_nfspagecache();
1500 err = nfs_init_inodecache();
1504 err = nfs_init_readpagecache();
1508 err = nfs_init_writepagecache();
1512 err = nfs_init_directcache();
1516 #ifdef CONFIG_PROC_FS
1517 rpc_proc_register(&nfs_rpcstat);
1519 if ((err = register_nfs_fs()) != 0)
1523 #ifdef CONFIG_PROC_FS
1524 rpc_proc_unregister("nfs");
1526 nfs_destroy_directcache();
1528 nfs_destroy_writepagecache();
1530 nfs_destroy_readpagecache();
1532 nfs_destroy_inodecache();
1534 nfs_destroy_nfspagecache();
1540 nfs_fscache_unregister();
1542 nfs_dns_resolver_destroy();
1547 static void __exit exit_nfs_fs(void)
1549 nfs_destroy_directcache();
1550 nfs_destroy_writepagecache();
1551 nfs_destroy_readpagecache();
1552 nfs_destroy_inodecache();
1553 nfs_destroy_nfspagecache();
1554 nfs_fscache_unregister();
1555 nfs_dns_resolver_destroy();
1556 #ifdef CONFIG_PROC_FS
1557 rpc_proc_unregister("nfs");
1559 unregister_nfs_fs();
1564 /* Not quite true; I just maintain it */
1565 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1566 MODULE_LICENSE("GPL");
1567 module_param(enable_ino64, bool, 0644);
1569 module_init(init_nfs_fs)
1570 module_exit(exit_nfs_fs)