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>
39 #include <linux/slab.h>
41 #include <asm/system.h>
42 #include <asm/uaccess.h>
46 #include "delegation.h"
50 #include "dns_resolve.h"
52 #define NFSDBG_FACILITY NFSDBG_VFS
54 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
56 /* Default is to see 64-bit inode numbers */
57 static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
59 static void nfs_invalidate_inode(struct inode *);
60 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
62 static struct kmem_cache * nfs_inode_cachep;
64 static inline unsigned long
65 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
67 return nfs_fileid_to_ino_t(fattr->fileid);
71 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
72 * @word: long word containing the bit lock
74 int nfs_wait_bit_killable(void *word)
76 if (fatal_signal_pending(current))
83 * nfs_compat_user_ino64 - returns the user-visible inode number
84 * @fileid: 64-bit fileid
86 * This function returns a 32-bit inode number if the boot parameter
87 * nfs.enable_ino64 is zero.
89 u64 nfs_compat_user_ino64(u64 fileid)
96 if (sizeof(ino) < sizeof(fileid))
97 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
101 void nfs_clear_inode(struct inode *inode)
104 * The following should never happen...
106 BUG_ON(nfs_have_writebacks(inode));
107 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
108 nfs_zap_acl_cache(inode);
109 nfs_access_zap_cache(inode);
110 nfs_fscache_release_inode_cookie(inode);
114 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
116 int nfs_sync_mapping(struct address_space *mapping)
120 if (mapping->nrpages != 0) {
121 unmap_mapping_range(mapping, 0, 0, 0);
122 ret = nfs_wb_all(mapping->host);
128 * Invalidate the local caches
130 static void nfs_zap_caches_locked(struct inode *inode)
132 struct nfs_inode *nfsi = NFS_I(inode);
133 int mode = inode->i_mode;
135 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
137 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
138 nfsi->attrtimeo_timestamp = jiffies;
140 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
141 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
142 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
144 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
147 void nfs_zap_caches(struct inode *inode)
149 spin_lock(&inode->i_lock);
150 nfs_zap_caches_locked(inode);
151 spin_unlock(&inode->i_lock);
154 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
156 if (mapping->nrpages != 0) {
157 spin_lock(&inode->i_lock);
158 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
159 spin_unlock(&inode->i_lock);
163 void nfs_zap_acl_cache(struct inode *inode)
165 void (*clear_acl_cache)(struct inode *);
167 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
168 if (clear_acl_cache != NULL)
169 clear_acl_cache(inode);
170 spin_lock(&inode->i_lock);
171 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
172 spin_unlock(&inode->i_lock);
175 void nfs_invalidate_atime(struct inode *inode)
177 spin_lock(&inode->i_lock);
178 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
179 spin_unlock(&inode->i_lock);
183 * Invalidate, but do not unhash, the inode.
184 * NB: must be called with inode->i_lock held!
186 static void nfs_invalidate_inode(struct inode *inode)
188 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
189 nfs_zap_caches_locked(inode);
192 struct nfs_find_desc {
194 struct nfs_fattr *fattr;
198 * In NFSv3 we can have 64bit inode numbers. In order to support
199 * this, and re-exported directories (also seen in NFSv2)
200 * we are forced to allow 2 different inodes to have the same
204 nfs_find_actor(struct inode *inode, void *opaque)
206 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
207 struct nfs_fh *fh = desc->fh;
208 struct nfs_fattr *fattr = desc->fattr;
210 if (NFS_FILEID(inode) != fattr->fileid)
212 if (nfs_compare_fh(NFS_FH(inode), fh))
214 if (is_bad_inode(inode) || NFS_STALE(inode))
220 nfs_init_locked(struct inode *inode, void *opaque)
222 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
223 struct nfs_fattr *fattr = desc->fattr;
225 set_nfs_fileid(inode, fattr->fileid);
226 nfs_copy_fh(NFS_FH(inode), desc->fh);
230 /* Don't use READDIRPLUS on directories that we believe are too large */
231 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
234 * This is our front-end to iget that looks up inodes by file handle
235 * instead of inode number.
238 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
240 struct nfs_find_desc desc = {
244 struct inode *inode = ERR_PTR(-ENOENT);
247 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
249 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
252 hash = nfs_fattr_to_ino_t(fattr);
254 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
256 inode = ERR_PTR(-ENOMEM);
260 if (inode->i_state & I_NEW) {
261 struct nfs_inode *nfsi = NFS_I(inode);
262 unsigned long now = jiffies;
264 /* We set i_ino for the few things that still rely on it,
268 /* We can't support update_atime(), since the server will reset it */
269 inode->i_flags |= S_NOATIME|S_NOCMTIME;
270 inode->i_mode = fattr->mode;
271 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
272 && nfs_server_capable(inode, NFS_CAP_MODE))
273 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
274 | NFS_INO_INVALID_ACCESS
275 | NFS_INO_INVALID_ACL;
276 /* Why so? Because we want revalidate for devices/FIFOs, and
277 * that's precisely what we have in nfs_file_inode_operations.
279 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
280 if (S_ISREG(inode->i_mode)) {
281 inode->i_fop = &nfs_file_operations;
282 inode->i_data.a_ops = &nfs_file_aops;
283 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
284 } else if (S_ISDIR(inode->i_mode)) {
285 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
286 inode->i_fop = &nfs_dir_operations;
287 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
288 && fattr->size <= NFS_LIMIT_READDIRPLUS)
289 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
290 /* Deal with crossing mountpoints */
291 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
292 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
293 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
294 inode->i_op = &nfs_referral_inode_operations;
296 inode->i_op = &nfs_mountpoint_inode_operations;
298 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
300 } else if (S_ISLNK(inode->i_mode))
301 inode->i_op = &nfs_symlink_inode_operations;
303 init_special_inode(inode, inode->i_mode, fattr->rdev);
305 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
306 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
307 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
308 nfsi->change_attr = 0;
314 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
316 nfsi->read_cache_jiffies = fattr->time_start;
317 nfsi->attr_gencount = fattr->gencount;
318 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
319 inode->i_atime = fattr->atime;
320 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
321 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
322 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
323 inode->i_mtime = fattr->mtime;
324 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
325 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
326 | NFS_INO_INVALID_DATA;
327 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
328 inode->i_ctime = fattr->ctime;
329 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
330 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
331 | NFS_INO_INVALID_ACCESS
332 | NFS_INO_INVALID_ACL;
333 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
334 nfsi->change_attr = fattr->change_attr;
335 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
336 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
337 | NFS_INO_INVALID_DATA;
338 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
339 inode->i_size = nfs_size_to_loff_t(fattr->size);
341 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
342 | NFS_INO_INVALID_DATA
343 | NFS_INO_REVAL_PAGECACHE;
344 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
345 inode->i_nlink = fattr->nlink;
346 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
347 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
348 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
349 inode->i_uid = fattr->uid;
350 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
351 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
352 | NFS_INO_INVALID_ACCESS
353 | NFS_INO_INVALID_ACL;
354 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
355 inode->i_gid = fattr->gid;
356 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
357 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
358 | NFS_INO_INVALID_ACCESS
359 | NFS_INO_INVALID_ACL;
360 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
361 inode->i_blocks = fattr->du.nfs2.blocks;
362 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
364 * report the blocks in 512byte units
366 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
368 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
369 nfsi->attrtimeo_timestamp = now;
370 nfsi->access_cache = RB_ROOT;
372 nfs_fscache_init_inode_cookie(inode);
374 unlock_new_inode(inode);
376 nfs_refresh_inode(inode, fattr);
377 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
379 (long long)NFS_FILEID(inode),
380 atomic_read(&inode->i_count));
386 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
390 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
393 nfs_setattr(struct dentry *dentry, struct iattr *attr)
395 struct inode *inode = dentry->d_inode;
396 struct nfs_fattr *fattr;
399 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
401 /* skip mode change if it's just for clearing setuid/setgid */
402 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
403 attr->ia_valid &= ~ATTR_MODE;
405 if (attr->ia_valid & ATTR_SIZE) {
406 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
407 attr->ia_valid &= ~ATTR_SIZE;
410 /* Optimization: if the end result is no change, don't RPC */
411 attr->ia_valid &= NFS_VALID_ATTRS;
412 if ((attr->ia_valid & ~ATTR_FILE) == 0)
415 /* Write all dirty data */
416 if (S_ISREG(inode->i_mode)) {
417 filemap_write_and_wait(inode->i_mapping);
421 fattr = nfs_alloc_fattr();
425 * Return any delegations if we're going to change ACLs
427 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
428 nfs_inode_return_delegation(inode);
429 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
431 nfs_refresh_inode(inode, fattr);
432 nfs_free_fattr(fattr);
438 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
439 * @inode: inode of the file used
440 * @offset: file offset to start truncating
442 * This is a copy of the common vmtruncate, but with the locking
443 * corrected to take into account the fact that NFS requires
444 * inode->i_size to be updated under the inode->i_lock.
446 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
451 err = inode_newsize_ok(inode, offset);
455 spin_lock(&inode->i_lock);
456 oldsize = inode->i_size;
457 i_size_write(inode, offset);
458 spin_unlock(&inode->i_lock);
460 truncate_pagecache(inode, oldsize, offset);
466 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
467 * @inode: pointer to struct inode
468 * @attr: pointer to struct iattr
470 * Note: we do this in the *proc.c in order to ensure that
471 * it works for things like exclusive creates too.
473 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
475 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
476 spin_lock(&inode->i_lock);
477 if ((attr->ia_valid & ATTR_MODE) != 0) {
478 int mode = attr->ia_mode & S_IALLUGO;
479 mode |= inode->i_mode & ~S_IALLUGO;
480 inode->i_mode = mode;
482 if ((attr->ia_valid & ATTR_UID) != 0)
483 inode->i_uid = attr->ia_uid;
484 if ((attr->ia_valid & ATTR_GID) != 0)
485 inode->i_gid = attr->ia_gid;
486 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
487 spin_unlock(&inode->i_lock);
489 if ((attr->ia_valid & ATTR_SIZE) != 0) {
490 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
491 nfs_vmtruncate(inode, attr->ia_size);
495 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
497 struct inode *inode = dentry->d_inode;
498 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
501 /* Flush out writes to the server in order to update c/mtime. */
502 if (S_ISREG(inode->i_mode)) {
503 err = filemap_write_and_wait(inode->i_mapping);
509 * We may force a getattr if the user cares about atime.
511 * Note that we only have to check the vfsmount flags here:
512 * - NFS always sets S_NOATIME by so checking it would give a
514 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
515 * no point in checking those.
517 if ((mnt->mnt_flags & MNT_NOATIME) ||
518 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
522 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
524 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
526 generic_fillattr(inode, stat);
527 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
534 * nfs_close_context - Common close_context() routine NFSv2/v3
535 * @ctx: pointer to context
536 * @is_sync: is this a synchronous close
538 * always ensure that the attributes are up to date if we're mounted
539 * with close-to-open semantics
541 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
544 struct nfs_server *server;
546 if (!(ctx->mode & FMODE_WRITE))
550 inode = ctx->path.dentry->d_inode;
551 if (!list_empty(&NFS_I(inode)->open_files))
553 server = NFS_SERVER(inode);
554 if (server->flags & NFS_MOUNT_NOCTO)
556 nfs_revalidate_inode(server, inode);
559 static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
561 struct nfs_open_context *ctx;
563 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
566 path_get(&ctx->path);
567 ctx->cred = get_rpccred(cred);
569 ctx->lockowner = current->files;
573 atomic_set(&ctx->count, 1);
578 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
581 atomic_inc(&ctx->count);
585 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
587 struct inode *inode = ctx->path.dentry->d_inode;
589 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
591 list_del(&ctx->list);
592 spin_unlock(&inode->i_lock);
593 NFS_PROTO(inode)->close_context(ctx, is_sync);
594 if (ctx->cred != NULL)
595 put_rpccred(ctx->cred);
596 path_put(&ctx->path);
600 void put_nfs_open_context(struct nfs_open_context *ctx)
602 __put_nfs_open_context(ctx, 0);
606 * Ensure that mmap has a recent RPC credential for use when writing out
609 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
611 struct inode *inode = filp->f_path.dentry->d_inode;
612 struct nfs_inode *nfsi = NFS_I(inode);
614 filp->private_data = get_nfs_open_context(ctx);
615 spin_lock(&inode->i_lock);
616 list_add(&ctx->list, &nfsi->open_files);
617 spin_unlock(&inode->i_lock);
621 * Given an inode, search for an open context with the desired characteristics
623 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
625 struct nfs_inode *nfsi = NFS_I(inode);
626 struct nfs_open_context *pos, *ctx = NULL;
628 spin_lock(&inode->i_lock);
629 list_for_each_entry(pos, &nfsi->open_files, list) {
630 if (cred != NULL && pos->cred != cred)
632 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
634 ctx = get_nfs_open_context(pos);
637 spin_unlock(&inode->i_lock);
641 static void nfs_file_clear_open_context(struct file *filp)
643 struct inode *inode = filp->f_path.dentry->d_inode;
644 struct nfs_open_context *ctx = nfs_file_open_context(filp);
647 filp->private_data = NULL;
648 spin_lock(&inode->i_lock);
649 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
650 spin_unlock(&inode->i_lock);
651 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
656 * These allocate and release file read/write context information.
658 int nfs_open(struct inode *inode, struct file *filp)
660 struct nfs_open_context *ctx;
661 struct rpc_cred *cred;
663 cred = rpc_lookup_cred();
665 return PTR_ERR(cred);
666 ctx = alloc_nfs_open_context(&filp->f_path, cred);
670 ctx->mode = filp->f_mode;
671 nfs_file_set_open_context(filp, ctx);
672 put_nfs_open_context(ctx);
673 nfs_fscache_set_inode_cookie(inode, filp);
677 int nfs_release(struct inode *inode, struct file *filp)
679 nfs_file_clear_open_context(filp);
684 * This function is called whenever some part of NFS notices that
685 * the cached attributes have to be refreshed.
688 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
690 int status = -ESTALE;
691 struct nfs_fattr *fattr = NULL;
692 struct nfs_inode *nfsi = NFS_I(inode);
694 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
695 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
697 if (is_bad_inode(inode))
699 if (NFS_STALE(inode))
703 fattr = nfs_alloc_fattr();
707 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
708 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
710 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
712 (long long)NFS_FILEID(inode), status);
713 if (status == -ESTALE) {
714 nfs_zap_caches(inode);
715 if (!S_ISDIR(inode->i_mode))
716 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
721 status = nfs_refresh_inode(inode, fattr);
723 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
725 (long long)NFS_FILEID(inode), status);
729 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
730 nfs_zap_acl_cache(inode);
732 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
734 (long long)NFS_FILEID(inode));
737 nfs_free_fattr(fattr);
741 int nfs_attribute_timeout(struct inode *inode)
743 struct nfs_inode *nfsi = NFS_I(inode);
745 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
748 static int nfs_attribute_cache_expired(struct inode *inode)
750 if (nfs_have_delegated_attributes(inode))
752 return nfs_attribute_timeout(inode);
756 * nfs_revalidate_inode - Revalidate the inode attributes
757 * @server - pointer to nfs_server struct
758 * @inode - pointer to inode struct
760 * Updates inode attribute information by retrieving the data from the server.
762 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
764 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
765 && !nfs_attribute_cache_expired(inode))
766 return NFS_STALE(inode) ? -ESTALE : 0;
767 return __nfs_revalidate_inode(server, inode);
770 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
772 struct nfs_inode *nfsi = NFS_I(inode);
774 if (mapping->nrpages != 0) {
775 int ret = invalidate_inode_pages2(mapping);
779 spin_lock(&inode->i_lock);
780 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
781 if (S_ISDIR(inode->i_mode))
782 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
783 spin_unlock(&inode->i_lock);
784 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
785 nfs_fscache_reset_inode_cookie(inode);
786 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
787 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
792 * nfs_revalidate_mapping - Revalidate the pagecache
793 * @inode - pointer to host inode
794 * @mapping - pointer to mapping
796 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
798 struct nfs_inode *nfsi = NFS_I(inode);
802 * swapfiles are not supposed to be shared.
804 if (IS_SWAPFILE(inode))
807 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
808 || nfs_attribute_cache_expired(inode)
809 || NFS_STALE(inode)) {
810 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
814 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
815 ret = nfs_invalidate_mapping(inode, mapping);
820 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
822 struct nfs_inode *nfsi = NFS_I(inode);
824 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
825 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
826 && nfsi->change_attr == fattr->pre_change_attr) {
827 nfsi->change_attr = fattr->change_attr;
828 if (S_ISDIR(inode->i_mode))
829 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
831 /* If we have atomic WCC data, we may update some attributes */
832 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
833 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
834 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
835 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
837 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
838 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
839 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
840 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
841 if (S_ISDIR(inode->i_mode))
842 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
844 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
845 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
846 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
847 && nfsi->npages == 0)
848 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
852 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
853 * @inode - pointer to inode
854 * @fattr - updated attributes
856 * Verifies the attribute cache. If we have just changed the attributes,
857 * so that fattr carries weak cache consistency data, then it may
858 * also update the ctime/mtime/change_attribute.
860 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
862 struct nfs_inode *nfsi = NFS_I(inode);
863 loff_t cur_size, new_isize;
864 unsigned long invalid = 0;
867 /* Has the inode gone and changed behind our back? */
868 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
870 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
873 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
874 nfsi->change_attr != fattr->change_attr)
875 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
877 /* Verify a few of the more important attributes */
878 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
879 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
881 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
882 cur_size = i_size_read(inode);
883 new_isize = nfs_size_to_loff_t(fattr->size);
884 if (cur_size != new_isize && nfsi->npages == 0)
885 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
888 /* Have any file permissions changed? */
889 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
890 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
891 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
892 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
893 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
894 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
896 /* Has the link count changed? */
897 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
898 invalid |= NFS_INO_INVALID_ATTR;
900 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
901 invalid |= NFS_INO_INVALID_ATIME;
904 nfsi->cache_validity |= invalid;
906 nfsi->read_cache_jiffies = fattr->time_start;
910 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
912 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
914 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
917 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
919 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
921 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
924 static atomic_long_t nfs_attr_generation_counter;
926 static unsigned long nfs_read_attr_generation_counter(void)
928 return atomic_long_read(&nfs_attr_generation_counter);
931 unsigned long nfs_inc_attr_generation_counter(void)
933 return atomic_long_inc_return(&nfs_attr_generation_counter);
936 void nfs_fattr_init(struct nfs_fattr *fattr)
939 fattr->time_start = jiffies;
940 fattr->gencount = nfs_inc_attr_generation_counter();
943 struct nfs_fattr *nfs_alloc_fattr(void)
945 struct nfs_fattr *fattr;
947 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
949 nfs_fattr_init(fattr);
953 struct nfs_fh *nfs_alloc_fhandle(void)
957 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
964 * nfs_inode_attrs_need_update - check if the inode attributes need updating
965 * @inode - pointer to inode
966 * @fattr - attributes
968 * Attempt to divine whether or not an RPC call reply carrying stale
969 * attributes got scheduled after another call carrying updated ones.
971 * To do so, the function first assumes that a more recent ctime means
972 * that the attributes in fattr are newer, however it also attempt to
973 * catch the case where ctime either didn't change, or went backwards
974 * (if someone reset the clock on the server) by looking at whether
975 * or not this RPC call was started after the inode was last updated.
976 * Note also the check for wraparound of 'attr_gencount'
978 * The function returns 'true' if it thinks the attributes in 'fattr' are
979 * more recent than the ones cached in the inode.
982 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
984 const struct nfs_inode *nfsi = NFS_I(inode);
986 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
987 nfs_ctime_need_update(inode, fattr) ||
988 nfs_size_need_update(inode, fattr) ||
989 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
992 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
994 if (nfs_inode_attrs_need_update(inode, fattr))
995 return nfs_update_inode(inode, fattr);
996 return nfs_check_inode_attributes(inode, fattr);
1000 * nfs_refresh_inode - try to update the inode attribute cache
1001 * @inode - pointer to inode
1002 * @fattr - updated attributes
1004 * Check that an RPC call that returned attributes has not overlapped with
1005 * other recent updates of the inode metadata, then decide whether it is
1006 * safe to do a full update of the inode attributes, or whether just to
1007 * call nfs_check_inode_attributes.
1009 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1013 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1015 spin_lock(&inode->i_lock);
1016 status = nfs_refresh_inode_locked(inode, fattr);
1017 spin_unlock(&inode->i_lock);
1022 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1024 struct nfs_inode *nfsi = NFS_I(inode);
1026 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1027 if (S_ISDIR(inode->i_mode))
1028 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1029 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1031 return nfs_refresh_inode_locked(inode, fattr);
1035 * nfs_post_op_update_inode - try to update the inode attribute cache
1036 * @inode - pointer to inode
1037 * @fattr - updated attributes
1039 * After an operation that has changed the inode metadata, mark the
1040 * attribute cache as being invalid, then try to update it.
1042 * NB: if the server didn't return any post op attributes, this
1043 * function will force the retrieval of attributes before the next
1044 * NFS request. Thus it should be used only for operations that
1045 * are expected to change one or more attributes, to avoid
1046 * unnecessary NFS requests and trips through nfs_update_inode().
1048 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1052 spin_lock(&inode->i_lock);
1053 status = nfs_post_op_update_inode_locked(inode, fattr);
1054 spin_unlock(&inode->i_lock);
1059 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1060 * @inode - pointer to inode
1061 * @fattr - updated attributes
1063 * After an operation that has changed the inode metadata, mark the
1064 * attribute cache as being invalid, then try to update it. Fake up
1065 * weak cache consistency data, if none exist.
1067 * This function is mainly designed to be used by the ->write_done() functions.
1069 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1073 spin_lock(&inode->i_lock);
1074 /* Don't do a WCC update if these attributes are already stale */
1075 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1076 !nfs_inode_attrs_need_update(inode, fattr)) {
1077 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1078 | NFS_ATTR_FATTR_PRESIZE
1079 | NFS_ATTR_FATTR_PREMTIME
1080 | NFS_ATTR_FATTR_PRECTIME);
1083 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1084 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1085 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1086 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1088 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1089 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1090 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1091 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1093 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1094 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1095 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1096 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1098 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1099 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1100 fattr->pre_size = i_size_read(inode);
1101 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1104 status = nfs_post_op_update_inode_locked(inode, fattr);
1105 spin_unlock(&inode->i_lock);
1110 * Many nfs protocol calls return the new file attributes after
1111 * an operation. Here we update the inode to reflect the state
1112 * of the server's inode.
1114 * This is a bit tricky because we have to make sure all dirty pages
1115 * have been sent off to the server before calling invalidate_inode_pages.
1116 * To make sure no other process adds more write requests while we try
1117 * our best to flush them, we make them sleep during the attribute refresh.
1119 * A very similar scenario holds for the dir cache.
1121 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1123 struct nfs_server *server;
1124 struct nfs_inode *nfsi = NFS_I(inode);
1125 loff_t cur_isize, new_isize;
1126 unsigned long invalid = 0;
1127 unsigned long now = jiffies;
1128 unsigned long save_cache_validity;
1130 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1131 __func__, inode->i_sb->s_id, inode->i_ino,
1132 atomic_read(&inode->i_count), fattr->valid);
1134 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1138 * Make sure the inode's type hasn't changed.
1140 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1143 server = NFS_SERVER(inode);
1144 /* Update the fsid? */
1145 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1146 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1147 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1148 server->fsid = fattr->fsid;
1151 * Update the read time so we don't revalidate too often.
1153 nfsi->read_cache_jiffies = fattr->time_start;
1155 save_cache_validity = nfsi->cache_validity;
1156 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1157 | NFS_INO_INVALID_ATIME
1158 | NFS_INO_REVAL_FORCED
1159 | NFS_INO_REVAL_PAGECACHE);
1161 /* Do atomic weak cache consistency updates */
1162 nfs_wcc_update_inode(inode, fattr);
1164 /* More cache consistency checks */
1165 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1166 if (nfsi->change_attr != fattr->change_attr) {
1167 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1168 inode->i_sb->s_id, inode->i_ino);
1169 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1170 if (S_ISDIR(inode->i_mode))
1171 nfs_force_lookup_revalidate(inode);
1172 nfsi->change_attr = fattr->change_attr;
1174 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1175 invalid |= save_cache_validity;
1177 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1178 /* NFSv2/v3: Check if the mtime agrees */
1179 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1180 dprintk("NFS: mtime change on server for file %s/%ld\n",
1181 inode->i_sb->s_id, inode->i_ino);
1182 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1183 if (S_ISDIR(inode->i_mode))
1184 nfs_force_lookup_revalidate(inode);
1185 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1187 } else if (server->caps & NFS_CAP_MTIME)
1188 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1189 | NFS_INO_INVALID_DATA
1190 | NFS_INO_REVAL_PAGECACHE
1191 | NFS_INO_REVAL_FORCED);
1193 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1194 /* If ctime has changed we should definitely clear access+acl caches */
1195 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1196 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1197 /* and probably clear data for a directory too as utimes can cause
1198 * havoc with our cache.
1200 if (S_ISDIR(inode->i_mode)) {
1201 invalid |= NFS_INO_INVALID_DATA;
1202 nfs_force_lookup_revalidate(inode);
1204 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1206 } else if (server->caps & NFS_CAP_CTIME)
1207 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1208 | NFS_INO_INVALID_ACCESS
1209 | NFS_INO_INVALID_ACL
1210 | NFS_INO_REVAL_FORCED);
1212 /* Check if our cached file size is stale */
1213 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1214 new_isize = nfs_size_to_loff_t(fattr->size);
1215 cur_isize = i_size_read(inode);
1216 if (new_isize != cur_isize) {
1217 /* Do we perhaps have any outstanding writes, or has
1218 * the file grown beyond our last write? */
1219 if (nfsi->npages == 0 || new_isize > cur_isize) {
1220 i_size_write(inode, new_isize);
1221 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1223 dprintk("NFS: isize change on server for file %s/%ld\n",
1224 inode->i_sb->s_id, inode->i_ino);
1227 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1228 | NFS_INO_REVAL_PAGECACHE
1229 | NFS_INO_REVAL_FORCED);
1232 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1233 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1234 else if (server->caps & NFS_CAP_ATIME)
1235 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1236 | NFS_INO_REVAL_FORCED);
1238 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1239 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1240 umode_t newmode = inode->i_mode & S_IFMT;
1241 newmode |= fattr->mode & S_IALLUGO;
1242 inode->i_mode = newmode;
1243 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1245 } else if (server->caps & NFS_CAP_MODE)
1246 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1247 | NFS_INO_INVALID_ACCESS
1248 | NFS_INO_INVALID_ACL
1249 | NFS_INO_REVAL_FORCED);
1251 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1252 if (inode->i_uid != fattr->uid) {
1253 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1254 inode->i_uid = fattr->uid;
1256 } else if (server->caps & NFS_CAP_OWNER)
1257 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1258 | NFS_INO_INVALID_ACCESS
1259 | NFS_INO_INVALID_ACL
1260 | NFS_INO_REVAL_FORCED);
1262 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1263 if (inode->i_gid != fattr->gid) {
1264 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1265 inode->i_gid = fattr->gid;
1267 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1268 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1269 | NFS_INO_INVALID_ACCESS
1270 | NFS_INO_INVALID_ACL
1271 | NFS_INO_REVAL_FORCED);
1273 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1274 if (inode->i_nlink != fattr->nlink) {
1275 invalid |= NFS_INO_INVALID_ATTR;
1276 if (S_ISDIR(inode->i_mode))
1277 invalid |= NFS_INO_INVALID_DATA;
1278 inode->i_nlink = fattr->nlink;
1280 } else if (server->caps & NFS_CAP_NLINK)
1281 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1282 | NFS_INO_REVAL_FORCED);
1284 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1286 * report the blocks in 512byte units
1288 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1290 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1291 inode->i_blocks = fattr->du.nfs2.blocks;
1293 /* Update attrtimeo value if we're out of the unstable period */
1294 if (invalid & NFS_INO_INVALID_ATTR) {
1295 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1296 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1297 nfsi->attrtimeo_timestamp = now;
1298 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1300 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1301 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1302 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1303 nfsi->attrtimeo_timestamp = now;
1306 invalid &= ~NFS_INO_INVALID_ATTR;
1307 /* Don't invalidate the data if we were to blame */
1308 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1309 || S_ISLNK(inode->i_mode)))
1310 invalid &= ~NFS_INO_INVALID_DATA;
1311 if (!nfs_have_delegation(inode, FMODE_READ) ||
1312 (save_cache_validity & NFS_INO_REVAL_FORCED))
1313 nfsi->cache_validity |= invalid;
1318 * Big trouble! The inode has become a different object.
1320 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1321 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1324 * No need to worry about unhashing the dentry, as the
1325 * lookup validation will know that the inode is bad.
1326 * (But we fall through to invalidate the caches.)
1328 nfs_invalidate_inode(inode);
1332 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1333 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1334 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1335 (long long)nfsi->fileid, (long long)fattr->fileid);
1340 #ifdef CONFIG_NFS_V4
1343 * Clean out any remaining NFSv4 state that might be left over due
1344 * to open() calls that passed nfs_atomic_lookup, but failed to call
1347 void nfs4_clear_inode(struct inode *inode)
1349 /* If we are holding a delegation, return it! */
1350 nfs_inode_return_delegation_noreclaim(inode);
1351 /* First call standard NFS clear_inode() code */
1352 nfs_clear_inode(inode);
1356 struct inode *nfs_alloc_inode(struct super_block *sb)
1358 struct nfs_inode *nfsi;
1359 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1363 nfsi->cache_validity = 0UL;
1364 #ifdef CONFIG_NFS_V3_ACL
1365 nfsi->acl_access = ERR_PTR(-EAGAIN);
1366 nfsi->acl_default = ERR_PTR(-EAGAIN);
1368 #ifdef CONFIG_NFS_V4
1369 nfsi->nfs4_acl = NULL;
1370 #endif /* CONFIG_NFS_V4 */
1371 return &nfsi->vfs_inode;
1374 void nfs_destroy_inode(struct inode *inode)
1376 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1379 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1381 #ifdef CONFIG_NFS_V4
1382 INIT_LIST_HEAD(&nfsi->open_states);
1383 nfsi->delegation = NULL;
1384 nfsi->delegation_state = 0;
1385 init_rwsem(&nfsi->rwsem);
1389 static void init_once(void *foo)
1391 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1393 inode_init_once(&nfsi->vfs_inode);
1394 INIT_LIST_HEAD(&nfsi->open_files);
1395 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1396 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1397 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1400 atomic_set(&nfsi->silly_count, 1);
1401 INIT_HLIST_HEAD(&nfsi->silly_list);
1402 init_waitqueue_head(&nfsi->waitqueue);
1403 nfs4_init_once(nfsi);
1406 static int __init nfs_init_inodecache(void)
1408 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1409 sizeof(struct nfs_inode),
1410 0, (SLAB_RECLAIM_ACCOUNT|
1413 if (nfs_inode_cachep == NULL)
1419 static void nfs_destroy_inodecache(void)
1421 kmem_cache_destroy(nfs_inode_cachep);
1424 struct workqueue_struct *nfsiod_workqueue;
1427 * start up the nfsiod workqueue
1429 static int nfsiod_start(void)
1431 struct workqueue_struct *wq;
1432 dprintk("RPC: creating workqueue nfsiod\n");
1433 wq = create_singlethread_workqueue("nfsiod");
1436 nfsiod_workqueue = wq;
1441 * Destroy the nfsiod workqueue
1443 static void nfsiod_stop(void)
1445 struct workqueue_struct *wq;
1447 wq = nfsiod_workqueue;
1450 nfsiod_workqueue = NULL;
1451 destroy_workqueue(wq);
1457 static int __init init_nfs_fs(void)
1461 err = nfs_dns_resolver_init();
1465 err = nfs_fscache_register();
1469 err = nfsiod_start();
1473 err = nfs_fs_proc_init();
1477 err = nfs_init_nfspagecache();
1481 err = nfs_init_inodecache();
1485 err = nfs_init_readpagecache();
1489 err = nfs_init_writepagecache();
1493 err = nfs_init_directcache();
1497 #ifdef CONFIG_PROC_FS
1498 rpc_proc_register(&nfs_rpcstat);
1500 if ((err = register_nfs_fs()) != 0)
1504 #ifdef CONFIG_PROC_FS
1505 rpc_proc_unregister("nfs");
1507 nfs_destroy_directcache();
1509 nfs_destroy_writepagecache();
1511 nfs_destroy_readpagecache();
1513 nfs_destroy_inodecache();
1515 nfs_destroy_nfspagecache();
1521 nfs_fscache_unregister();
1523 nfs_dns_resolver_destroy();
1528 static void __exit exit_nfs_fs(void)
1530 nfs_destroy_directcache();
1531 nfs_destroy_writepagecache();
1532 nfs_destroy_readpagecache();
1533 nfs_destroy_inodecache();
1534 nfs_destroy_nfspagecache();
1535 nfs_fscache_unregister();
1536 nfs_dns_resolver_destroy();
1537 #ifdef CONFIG_PROC_FS
1538 rpc_proc_unregister("nfs");
1540 unregister_nfs_fs();
1545 /* Not quite true; I just maintain it */
1546 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1547 MODULE_LICENSE("GPL");
1548 module_param(enable_ino64, bool, 0644);
1550 module_init(init_nfs_fs)
1551 module_exit(exit_nfs_fs)