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));
533 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
535 atomic_set(&l_ctx->count, 1);
536 l_ctx->lockowner = current->files;
537 l_ctx->pid = current->tgid;
538 INIT_LIST_HEAD(&l_ctx->list);
541 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
543 struct nfs_lock_context *pos;
545 list_for_each_entry(pos, &ctx->lock_context.list, list) {
546 if (pos->lockowner != current->files)
548 if (pos->pid != current->tgid)
550 atomic_inc(&pos->count);
556 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
558 struct nfs_lock_context *res, *new = NULL;
559 struct inode *inode = ctx->path.dentry->d_inode;
561 spin_lock(&inode->i_lock);
562 res = __nfs_find_lock_context(ctx);
564 spin_unlock(&inode->i_lock);
565 new = kmalloc(sizeof(*new), GFP_KERNEL);
568 nfs_init_lock_context(new);
569 spin_lock(&inode->i_lock);
570 res = __nfs_find_lock_context(ctx);
572 list_add_tail(&new->list, &ctx->lock_context.list);
573 new->open_context = ctx;
578 spin_unlock(&inode->i_lock);
583 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
585 struct nfs_open_context *ctx = l_ctx->open_context;
586 struct inode *inode = ctx->path.dentry->d_inode;
588 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
590 list_del(&l_ctx->list);
591 spin_unlock(&inode->i_lock);
596 * nfs_close_context - Common close_context() routine NFSv2/v3
597 * @ctx: pointer to context
598 * @is_sync: is this a synchronous close
600 * always ensure that the attributes are up to date if we're mounted
601 * with close-to-open semantics
603 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
606 struct nfs_server *server;
608 if (!(ctx->mode & FMODE_WRITE))
612 inode = ctx->path.dentry->d_inode;
613 if (!list_empty(&NFS_I(inode)->open_files))
615 server = NFS_SERVER(inode);
616 if (server->flags & NFS_MOUNT_NOCTO)
618 nfs_revalidate_inode(server, inode);
621 static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
623 struct nfs_open_context *ctx;
625 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
628 path_get(&ctx->path);
629 ctx->cred = get_rpccred(cred);
634 nfs_init_lock_context(&ctx->lock_context);
635 ctx->lock_context.open_context = ctx;
640 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
643 atomic_inc(&ctx->lock_context.count);
647 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
649 struct inode *inode = ctx->path.dentry->d_inode;
651 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
653 list_del(&ctx->list);
654 spin_unlock(&inode->i_lock);
655 NFS_PROTO(inode)->close_context(ctx, is_sync);
656 if (ctx->cred != NULL)
657 put_rpccred(ctx->cred);
658 path_put(&ctx->path);
662 void put_nfs_open_context(struct nfs_open_context *ctx)
664 __put_nfs_open_context(ctx, 0);
668 * Ensure that mmap has a recent RPC credential for use when writing out
671 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
673 struct inode *inode = filp->f_path.dentry->d_inode;
674 struct nfs_inode *nfsi = NFS_I(inode);
676 filp->private_data = get_nfs_open_context(ctx);
677 spin_lock(&inode->i_lock);
678 list_add(&ctx->list, &nfsi->open_files);
679 spin_unlock(&inode->i_lock);
683 * Given an inode, search for an open context with the desired characteristics
685 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
687 struct nfs_inode *nfsi = NFS_I(inode);
688 struct nfs_open_context *pos, *ctx = NULL;
690 spin_lock(&inode->i_lock);
691 list_for_each_entry(pos, &nfsi->open_files, list) {
692 if (cred != NULL && pos->cred != cred)
694 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
696 ctx = get_nfs_open_context(pos);
699 spin_unlock(&inode->i_lock);
703 static void nfs_file_clear_open_context(struct file *filp)
705 struct inode *inode = filp->f_path.dentry->d_inode;
706 struct nfs_open_context *ctx = nfs_file_open_context(filp);
709 filp->private_data = NULL;
710 spin_lock(&inode->i_lock);
711 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
712 spin_unlock(&inode->i_lock);
713 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
718 * These allocate and release file read/write context information.
720 int nfs_open(struct inode *inode, struct file *filp)
722 struct nfs_open_context *ctx;
723 struct rpc_cred *cred;
725 cred = rpc_lookup_cred();
727 return PTR_ERR(cred);
728 ctx = alloc_nfs_open_context(&filp->f_path, cred);
732 ctx->mode = filp->f_mode;
733 nfs_file_set_open_context(filp, ctx);
734 put_nfs_open_context(ctx);
735 nfs_fscache_set_inode_cookie(inode, filp);
739 int nfs_release(struct inode *inode, struct file *filp)
741 nfs_file_clear_open_context(filp);
746 * This function is called whenever some part of NFS notices that
747 * the cached attributes have to be refreshed.
750 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
752 int status = -ESTALE;
753 struct nfs_fattr *fattr = NULL;
754 struct nfs_inode *nfsi = NFS_I(inode);
756 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
757 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
759 if (is_bad_inode(inode))
761 if (NFS_STALE(inode))
765 fattr = nfs_alloc_fattr();
769 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
770 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
772 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
774 (long long)NFS_FILEID(inode), status);
775 if (status == -ESTALE) {
776 nfs_zap_caches(inode);
777 if (!S_ISDIR(inode->i_mode))
778 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
783 status = nfs_refresh_inode(inode, fattr);
785 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
787 (long long)NFS_FILEID(inode), status);
791 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
792 nfs_zap_acl_cache(inode);
794 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
796 (long long)NFS_FILEID(inode));
799 nfs_free_fattr(fattr);
803 int nfs_attribute_timeout(struct inode *inode)
805 struct nfs_inode *nfsi = NFS_I(inode);
807 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
810 static int nfs_attribute_cache_expired(struct inode *inode)
812 if (nfs_have_delegated_attributes(inode))
814 return nfs_attribute_timeout(inode);
818 * nfs_revalidate_inode - Revalidate the inode attributes
819 * @server - pointer to nfs_server struct
820 * @inode - pointer to inode struct
822 * Updates inode attribute information by retrieving the data from the server.
824 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
826 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
827 && !nfs_attribute_cache_expired(inode))
828 return NFS_STALE(inode) ? -ESTALE : 0;
829 return __nfs_revalidate_inode(server, inode);
832 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
834 struct nfs_inode *nfsi = NFS_I(inode);
836 if (mapping->nrpages != 0) {
837 int ret = invalidate_inode_pages2(mapping);
841 spin_lock(&inode->i_lock);
842 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
843 if (S_ISDIR(inode->i_mode))
844 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
845 spin_unlock(&inode->i_lock);
846 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
847 nfs_fscache_reset_inode_cookie(inode);
848 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
849 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
854 * nfs_revalidate_mapping - Revalidate the pagecache
855 * @inode - pointer to host inode
856 * @mapping - pointer to mapping
858 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
860 struct nfs_inode *nfsi = NFS_I(inode);
863 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
864 || nfs_attribute_cache_expired(inode)
865 || NFS_STALE(inode)) {
866 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
870 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
871 ret = nfs_invalidate_mapping(inode, mapping);
876 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
878 struct nfs_inode *nfsi = NFS_I(inode);
880 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
881 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
882 && nfsi->change_attr == fattr->pre_change_attr) {
883 nfsi->change_attr = fattr->change_attr;
884 if (S_ISDIR(inode->i_mode))
885 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
887 /* If we have atomic WCC data, we may update some attributes */
888 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
889 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
890 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
891 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
893 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
894 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
895 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
896 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
897 if (S_ISDIR(inode->i_mode))
898 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
900 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
901 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
902 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
903 && nfsi->npages == 0)
904 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
908 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
909 * @inode - pointer to inode
910 * @fattr - updated attributes
912 * Verifies the attribute cache. If we have just changed the attributes,
913 * so that fattr carries weak cache consistency data, then it may
914 * also update the ctime/mtime/change_attribute.
916 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
918 struct nfs_inode *nfsi = NFS_I(inode);
919 loff_t cur_size, new_isize;
920 unsigned long invalid = 0;
923 /* Has the inode gone and changed behind our back? */
924 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
926 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
929 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
930 nfsi->change_attr != fattr->change_attr)
931 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
933 /* Verify a few of the more important attributes */
934 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
935 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
937 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
938 cur_size = i_size_read(inode);
939 new_isize = nfs_size_to_loff_t(fattr->size);
940 if (cur_size != new_isize && nfsi->npages == 0)
941 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
944 /* Have any file permissions changed? */
945 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
946 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
947 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
948 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
949 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
950 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
952 /* Has the link count changed? */
953 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
954 invalid |= NFS_INO_INVALID_ATTR;
956 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
957 invalid |= NFS_INO_INVALID_ATIME;
960 nfsi->cache_validity |= invalid;
962 nfsi->read_cache_jiffies = fattr->time_start;
966 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
968 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
970 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
973 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
975 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
977 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
980 static atomic_long_t nfs_attr_generation_counter;
982 static unsigned long nfs_read_attr_generation_counter(void)
984 return atomic_long_read(&nfs_attr_generation_counter);
987 unsigned long nfs_inc_attr_generation_counter(void)
989 return atomic_long_inc_return(&nfs_attr_generation_counter);
992 void nfs_fattr_init(struct nfs_fattr *fattr)
995 fattr->time_start = jiffies;
996 fattr->gencount = nfs_inc_attr_generation_counter();
999 struct nfs_fattr *nfs_alloc_fattr(void)
1001 struct nfs_fattr *fattr;
1003 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1005 nfs_fattr_init(fattr);
1009 struct nfs_fh *nfs_alloc_fhandle(void)
1013 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1020 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1021 * @inode - pointer to inode
1022 * @fattr - attributes
1024 * Attempt to divine whether or not an RPC call reply carrying stale
1025 * attributes got scheduled after another call carrying updated ones.
1027 * To do so, the function first assumes that a more recent ctime means
1028 * that the attributes in fattr are newer, however it also attempt to
1029 * catch the case where ctime either didn't change, or went backwards
1030 * (if someone reset the clock on the server) by looking at whether
1031 * or not this RPC call was started after the inode was last updated.
1032 * Note also the check for wraparound of 'attr_gencount'
1034 * The function returns 'true' if it thinks the attributes in 'fattr' are
1035 * more recent than the ones cached in the inode.
1038 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1040 const struct nfs_inode *nfsi = NFS_I(inode);
1042 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1043 nfs_ctime_need_update(inode, fattr) ||
1044 nfs_size_need_update(inode, fattr) ||
1045 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1048 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1050 if (nfs_inode_attrs_need_update(inode, fattr))
1051 return nfs_update_inode(inode, fattr);
1052 return nfs_check_inode_attributes(inode, fattr);
1056 * nfs_refresh_inode - try to update the inode attribute cache
1057 * @inode - pointer to inode
1058 * @fattr - updated attributes
1060 * Check that an RPC call that returned attributes has not overlapped with
1061 * other recent updates of the inode metadata, then decide whether it is
1062 * safe to do a full update of the inode attributes, or whether just to
1063 * call nfs_check_inode_attributes.
1065 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1069 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1071 spin_lock(&inode->i_lock);
1072 status = nfs_refresh_inode_locked(inode, fattr);
1073 spin_unlock(&inode->i_lock);
1078 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1080 struct nfs_inode *nfsi = NFS_I(inode);
1082 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1083 if (S_ISDIR(inode->i_mode))
1084 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1085 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1087 return nfs_refresh_inode_locked(inode, fattr);
1091 * nfs_post_op_update_inode - try to update the inode attribute cache
1092 * @inode - pointer to inode
1093 * @fattr - updated attributes
1095 * After an operation that has changed the inode metadata, mark the
1096 * attribute cache as being invalid, then try to update it.
1098 * NB: if the server didn't return any post op attributes, this
1099 * function will force the retrieval of attributes before the next
1100 * NFS request. Thus it should be used only for operations that
1101 * are expected to change one or more attributes, to avoid
1102 * unnecessary NFS requests and trips through nfs_update_inode().
1104 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1108 spin_lock(&inode->i_lock);
1109 status = nfs_post_op_update_inode_locked(inode, fattr);
1110 spin_unlock(&inode->i_lock);
1115 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1116 * @inode - pointer to inode
1117 * @fattr - updated attributes
1119 * After an operation that has changed the inode metadata, mark the
1120 * attribute cache as being invalid, then try to update it. Fake up
1121 * weak cache consistency data, if none exist.
1123 * This function is mainly designed to be used by the ->write_done() functions.
1125 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1129 spin_lock(&inode->i_lock);
1130 /* Don't do a WCC update if these attributes are already stale */
1131 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1132 !nfs_inode_attrs_need_update(inode, fattr)) {
1133 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1134 | NFS_ATTR_FATTR_PRESIZE
1135 | NFS_ATTR_FATTR_PREMTIME
1136 | NFS_ATTR_FATTR_PRECTIME);
1139 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1140 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1141 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1142 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1144 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1145 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1146 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1147 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1149 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1150 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1151 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1152 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1154 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1155 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1156 fattr->pre_size = i_size_read(inode);
1157 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1160 status = nfs_post_op_update_inode_locked(inode, fattr);
1161 spin_unlock(&inode->i_lock);
1166 * Many nfs protocol calls return the new file attributes after
1167 * an operation. Here we update the inode to reflect the state
1168 * of the server's inode.
1170 * This is a bit tricky because we have to make sure all dirty pages
1171 * have been sent off to the server before calling invalidate_inode_pages.
1172 * To make sure no other process adds more write requests while we try
1173 * our best to flush them, we make them sleep during the attribute refresh.
1175 * A very similar scenario holds for the dir cache.
1177 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1179 struct nfs_server *server;
1180 struct nfs_inode *nfsi = NFS_I(inode);
1181 loff_t cur_isize, new_isize;
1182 unsigned long invalid = 0;
1183 unsigned long now = jiffies;
1184 unsigned long save_cache_validity;
1186 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1187 __func__, inode->i_sb->s_id, inode->i_ino,
1188 atomic_read(&inode->i_count), fattr->valid);
1190 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1194 * Make sure the inode's type hasn't changed.
1196 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1199 server = NFS_SERVER(inode);
1200 /* Update the fsid? */
1201 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1202 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1203 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1204 server->fsid = fattr->fsid;
1207 * Update the read time so we don't revalidate too often.
1209 nfsi->read_cache_jiffies = fattr->time_start;
1211 save_cache_validity = nfsi->cache_validity;
1212 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1213 | NFS_INO_INVALID_ATIME
1214 | NFS_INO_REVAL_FORCED
1215 | NFS_INO_REVAL_PAGECACHE);
1217 /* Do atomic weak cache consistency updates */
1218 nfs_wcc_update_inode(inode, fattr);
1220 /* More cache consistency checks */
1221 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1222 if (nfsi->change_attr != fattr->change_attr) {
1223 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1224 inode->i_sb->s_id, inode->i_ino);
1225 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1226 if (S_ISDIR(inode->i_mode))
1227 nfs_force_lookup_revalidate(inode);
1228 nfsi->change_attr = fattr->change_attr;
1230 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1231 invalid |= save_cache_validity;
1233 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1234 /* NFSv2/v3: Check if the mtime agrees */
1235 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1236 dprintk("NFS: mtime change on server for file %s/%ld\n",
1237 inode->i_sb->s_id, inode->i_ino);
1238 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1239 if (S_ISDIR(inode->i_mode))
1240 nfs_force_lookup_revalidate(inode);
1241 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1243 } else if (server->caps & NFS_CAP_MTIME)
1244 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1245 | NFS_INO_INVALID_DATA
1246 | NFS_INO_REVAL_PAGECACHE
1247 | NFS_INO_REVAL_FORCED);
1249 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1250 /* If ctime has changed we should definitely clear access+acl caches */
1251 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1252 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1253 /* and probably clear data for a directory too as utimes can cause
1254 * havoc with our cache.
1256 if (S_ISDIR(inode->i_mode)) {
1257 invalid |= NFS_INO_INVALID_DATA;
1258 nfs_force_lookup_revalidate(inode);
1260 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1262 } else if (server->caps & NFS_CAP_CTIME)
1263 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1264 | NFS_INO_INVALID_ACCESS
1265 | NFS_INO_INVALID_ACL
1266 | NFS_INO_REVAL_FORCED);
1268 /* Check if our cached file size is stale */
1269 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1270 new_isize = nfs_size_to_loff_t(fattr->size);
1271 cur_isize = i_size_read(inode);
1272 if (new_isize != cur_isize) {
1273 /* Do we perhaps have any outstanding writes, or has
1274 * the file grown beyond our last write? */
1275 if (nfsi->npages == 0 || new_isize > cur_isize) {
1276 i_size_write(inode, new_isize);
1277 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1279 dprintk("NFS: isize change on server for file %s/%ld\n",
1280 inode->i_sb->s_id, inode->i_ino);
1283 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1284 | NFS_INO_REVAL_PAGECACHE
1285 | NFS_INO_REVAL_FORCED);
1288 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1289 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1290 else if (server->caps & NFS_CAP_ATIME)
1291 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1292 | NFS_INO_REVAL_FORCED);
1294 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1295 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1296 umode_t newmode = inode->i_mode & S_IFMT;
1297 newmode |= fattr->mode & S_IALLUGO;
1298 inode->i_mode = newmode;
1299 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1301 } else if (server->caps & NFS_CAP_MODE)
1302 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1303 | NFS_INO_INVALID_ACCESS
1304 | NFS_INO_INVALID_ACL
1305 | NFS_INO_REVAL_FORCED);
1307 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1308 if (inode->i_uid != fattr->uid) {
1309 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1310 inode->i_uid = fattr->uid;
1312 } else if (server->caps & NFS_CAP_OWNER)
1313 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1314 | NFS_INO_INVALID_ACCESS
1315 | NFS_INO_INVALID_ACL
1316 | NFS_INO_REVAL_FORCED);
1318 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1319 if (inode->i_gid != fattr->gid) {
1320 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1321 inode->i_gid = fattr->gid;
1323 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1324 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1325 | NFS_INO_INVALID_ACCESS
1326 | NFS_INO_INVALID_ACL
1327 | NFS_INO_REVAL_FORCED);
1329 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1330 if (inode->i_nlink != fattr->nlink) {
1331 invalid |= NFS_INO_INVALID_ATTR;
1332 if (S_ISDIR(inode->i_mode))
1333 invalid |= NFS_INO_INVALID_DATA;
1334 inode->i_nlink = fattr->nlink;
1336 } else if (server->caps & NFS_CAP_NLINK)
1337 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1338 | NFS_INO_REVAL_FORCED);
1340 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1342 * report the blocks in 512byte units
1344 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1346 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1347 inode->i_blocks = fattr->du.nfs2.blocks;
1349 /* Update attrtimeo value if we're out of the unstable period */
1350 if (invalid & NFS_INO_INVALID_ATTR) {
1351 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1352 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1353 nfsi->attrtimeo_timestamp = now;
1354 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1356 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1357 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1358 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1359 nfsi->attrtimeo_timestamp = now;
1362 invalid &= ~NFS_INO_INVALID_ATTR;
1363 /* Don't invalidate the data if we were to blame */
1364 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1365 || S_ISLNK(inode->i_mode)))
1366 invalid &= ~NFS_INO_INVALID_DATA;
1367 if (!nfs_have_delegation(inode, FMODE_READ) ||
1368 (save_cache_validity & NFS_INO_REVAL_FORCED))
1369 nfsi->cache_validity |= invalid;
1374 * Big trouble! The inode has become a different object.
1376 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1377 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1380 * No need to worry about unhashing the dentry, as the
1381 * lookup validation will know that the inode is bad.
1382 * (But we fall through to invalidate the caches.)
1384 nfs_invalidate_inode(inode);
1388 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1389 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1390 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1391 (long long)nfsi->fileid, (long long)fattr->fileid);
1396 #ifdef CONFIG_NFS_V4
1399 * Clean out any remaining NFSv4 state that might be left over due
1400 * to open() calls that passed nfs_atomic_lookup, but failed to call
1403 void nfs4_clear_inode(struct inode *inode)
1405 /* If we are holding a delegation, return it! */
1406 nfs_inode_return_delegation_noreclaim(inode);
1407 /* First call standard NFS clear_inode() code */
1408 nfs_clear_inode(inode);
1412 struct inode *nfs_alloc_inode(struct super_block *sb)
1414 struct nfs_inode *nfsi;
1415 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1419 nfsi->cache_validity = 0UL;
1420 #ifdef CONFIG_NFS_V3_ACL
1421 nfsi->acl_access = ERR_PTR(-EAGAIN);
1422 nfsi->acl_default = ERR_PTR(-EAGAIN);
1424 #ifdef CONFIG_NFS_V4
1425 nfsi->nfs4_acl = NULL;
1426 #endif /* CONFIG_NFS_V4 */
1427 return &nfsi->vfs_inode;
1430 void nfs_destroy_inode(struct inode *inode)
1432 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1435 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1437 #ifdef CONFIG_NFS_V4
1438 INIT_LIST_HEAD(&nfsi->open_states);
1439 nfsi->delegation = NULL;
1440 nfsi->delegation_state = 0;
1441 init_rwsem(&nfsi->rwsem);
1445 static void init_once(void *foo)
1447 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1449 inode_init_once(&nfsi->vfs_inode);
1450 INIT_LIST_HEAD(&nfsi->open_files);
1451 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1452 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1453 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1456 atomic_set(&nfsi->silly_count, 1);
1457 INIT_HLIST_HEAD(&nfsi->silly_list);
1458 init_waitqueue_head(&nfsi->waitqueue);
1459 nfs4_init_once(nfsi);
1462 static int __init nfs_init_inodecache(void)
1464 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1465 sizeof(struct nfs_inode),
1466 0, (SLAB_RECLAIM_ACCOUNT|
1469 if (nfs_inode_cachep == NULL)
1475 static void nfs_destroy_inodecache(void)
1477 kmem_cache_destroy(nfs_inode_cachep);
1480 struct workqueue_struct *nfsiod_workqueue;
1483 * start up the nfsiod workqueue
1485 static int nfsiod_start(void)
1487 struct workqueue_struct *wq;
1488 dprintk("RPC: creating workqueue nfsiod\n");
1489 wq = create_singlethread_workqueue("nfsiod");
1492 nfsiod_workqueue = wq;
1497 * Destroy the nfsiod workqueue
1499 static void nfsiod_stop(void)
1501 struct workqueue_struct *wq;
1503 wq = nfsiod_workqueue;
1506 nfsiod_workqueue = NULL;
1507 destroy_workqueue(wq);
1513 static int __init init_nfs_fs(void)
1517 err = nfs_dns_resolver_init();
1521 err = nfs_fscache_register();
1525 err = nfsiod_start();
1529 err = nfs_fs_proc_init();
1533 err = nfs_init_nfspagecache();
1537 err = nfs_init_inodecache();
1541 err = nfs_init_readpagecache();
1545 err = nfs_init_writepagecache();
1549 err = nfs_init_directcache();
1553 #ifdef CONFIG_PROC_FS
1554 rpc_proc_register(&nfs_rpcstat);
1556 if ((err = register_nfs_fs()) != 0)
1560 #ifdef CONFIG_PROC_FS
1561 rpc_proc_unregister("nfs");
1563 nfs_destroy_directcache();
1565 nfs_destroy_writepagecache();
1567 nfs_destroy_readpagecache();
1569 nfs_destroy_inodecache();
1571 nfs_destroy_nfspagecache();
1577 nfs_fscache_unregister();
1579 nfs_dns_resolver_destroy();
1584 static void __exit exit_nfs_fs(void)
1586 nfs_destroy_directcache();
1587 nfs_destroy_writepagecache();
1588 nfs_destroy_readpagecache();
1589 nfs_destroy_inodecache();
1590 nfs_destroy_nfspagecache();
1591 nfs_fscache_unregister();
1592 nfs_dns_resolver_destroy();
1593 #ifdef CONFIG_PROC_FS
1594 rpc_proc_unregister("nfs");
1596 unregister_nfs_fs();
1601 /* Not quite true; I just maintain it */
1602 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1603 MODULE_LICENSE("GPL");
1604 module_param(enable_ino64, bool, 0644);
1606 module_init(init_nfs_fs)
1607 module_exit(exit_nfs_fs)