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 static 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);
113 void nfs_evict_inode(struct inode *inode)
115 truncate_inode_pages(&inode->i_data, 0);
116 end_writeback(inode);
117 nfs_clear_inode(inode);
121 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
123 int nfs_sync_mapping(struct address_space *mapping)
127 if (mapping->nrpages != 0) {
128 unmap_mapping_range(mapping, 0, 0, 0);
129 ret = nfs_wb_all(mapping->host);
135 * Invalidate the local caches
137 static void nfs_zap_caches_locked(struct inode *inode)
139 struct nfs_inode *nfsi = NFS_I(inode);
140 int mode = inode->i_mode;
142 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
144 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
145 nfsi->attrtimeo_timestamp = jiffies;
147 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
148 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
149 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
151 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
154 void nfs_zap_caches(struct inode *inode)
156 spin_lock(&inode->i_lock);
157 nfs_zap_caches_locked(inode);
158 spin_unlock(&inode->i_lock);
161 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
163 if (mapping->nrpages != 0) {
164 spin_lock(&inode->i_lock);
165 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
166 spin_unlock(&inode->i_lock);
170 void nfs_zap_acl_cache(struct inode *inode)
172 void (*clear_acl_cache)(struct inode *);
174 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
175 if (clear_acl_cache != NULL)
176 clear_acl_cache(inode);
177 spin_lock(&inode->i_lock);
178 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
179 spin_unlock(&inode->i_lock);
182 void nfs_invalidate_atime(struct inode *inode)
184 spin_lock(&inode->i_lock);
185 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
186 spin_unlock(&inode->i_lock);
190 * Invalidate, but do not unhash, the inode.
191 * NB: must be called with inode->i_lock held!
193 static void nfs_invalidate_inode(struct inode *inode)
195 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
196 nfs_zap_caches_locked(inode);
199 struct nfs_find_desc {
201 struct nfs_fattr *fattr;
205 * In NFSv3 we can have 64bit inode numbers. In order to support
206 * this, and re-exported directories (also seen in NFSv2)
207 * we are forced to allow 2 different inodes to have the same
211 nfs_find_actor(struct inode *inode, void *opaque)
213 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
214 struct nfs_fh *fh = desc->fh;
215 struct nfs_fattr *fattr = desc->fattr;
217 if (NFS_FILEID(inode) != fattr->fileid)
219 if (nfs_compare_fh(NFS_FH(inode), fh))
221 if (is_bad_inode(inode) || NFS_STALE(inode))
227 nfs_init_locked(struct inode *inode, void *opaque)
229 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
230 struct nfs_fattr *fattr = desc->fattr;
232 set_nfs_fileid(inode, fattr->fileid);
233 nfs_copy_fh(NFS_FH(inode), desc->fh);
238 * This is our front-end to iget that looks up inodes by file handle
239 * instead of inode number.
242 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
244 struct nfs_find_desc desc = {
248 struct inode *inode = ERR_PTR(-ENOENT);
251 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
253 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
256 hash = nfs_fattr_to_ino_t(fattr);
258 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
260 inode = ERR_PTR(-ENOMEM);
264 if (inode->i_state & I_NEW) {
265 struct nfs_inode *nfsi = NFS_I(inode);
266 unsigned long now = jiffies;
268 /* We set i_ino for the few things that still rely on it,
272 /* We can't support update_atime(), since the server will reset it */
273 inode->i_flags |= S_NOATIME|S_NOCMTIME;
274 inode->i_mode = fattr->mode;
275 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
276 && nfs_server_capable(inode, NFS_CAP_MODE))
277 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
278 | NFS_INO_INVALID_ACCESS
279 | NFS_INO_INVALID_ACL;
280 /* Why so? Because we want revalidate for devices/FIFOs, and
281 * that's precisely what we have in nfs_file_inode_operations.
283 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
284 if (S_ISREG(inode->i_mode)) {
285 inode->i_fop = &nfs_file_operations;
286 inode->i_data.a_ops = &nfs_file_aops;
287 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
288 } else if (S_ISDIR(inode->i_mode)) {
289 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
290 inode->i_fop = &nfs_dir_operations;
291 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
292 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
293 /* Deal with crossing mountpoints */
294 if ((fattr->valid & NFS_ATTR_FATTR_FSID)
295 && !nfs_fsid_equal(&NFS_SB(sb)->fsid, &fattr->fsid)) {
296 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
297 inode->i_op = &nfs_referral_inode_operations;
299 inode->i_op = &nfs_mountpoint_inode_operations;
301 set_bit(NFS_INO_MOUNTPOINT, &nfsi->flags);
303 } else if (S_ISLNK(inode->i_mode))
304 inode->i_op = &nfs_symlink_inode_operations;
306 init_special_inode(inode, inode->i_mode, fattr->rdev);
308 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
309 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
310 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
311 nfsi->change_attr = 0;
317 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
319 nfsi->read_cache_jiffies = fattr->time_start;
320 nfsi->attr_gencount = fattr->gencount;
321 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
322 inode->i_atime = fattr->atime;
323 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
324 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
325 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
326 inode->i_mtime = fattr->mtime;
327 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
328 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
329 | NFS_INO_INVALID_DATA;
330 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
331 inode->i_ctime = fattr->ctime;
332 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
333 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
334 | NFS_INO_INVALID_ACCESS
335 | NFS_INO_INVALID_ACL;
336 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
337 nfsi->change_attr = fattr->change_attr;
338 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
339 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
340 | NFS_INO_INVALID_DATA;
341 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
342 inode->i_size = nfs_size_to_loff_t(fattr->size);
344 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
345 | NFS_INO_INVALID_DATA
346 | NFS_INO_REVAL_PAGECACHE;
347 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
348 inode->i_nlink = fattr->nlink;
349 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
350 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
351 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
352 inode->i_uid = fattr->uid;
353 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
354 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
355 | NFS_INO_INVALID_ACCESS
356 | NFS_INO_INVALID_ACL;
357 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
358 inode->i_gid = fattr->gid;
359 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
360 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
361 | NFS_INO_INVALID_ACCESS
362 | NFS_INO_INVALID_ACL;
363 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
364 inode->i_blocks = fattr->du.nfs2.blocks;
365 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
367 * report the blocks in 512byte units
369 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
371 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
372 nfsi->attrtimeo_timestamp = now;
373 nfsi->access_cache = RB_ROOT;
375 nfs_fscache_init_inode_cookie(inode);
377 unlock_new_inode(inode);
379 nfs_refresh_inode(inode, fattr);
380 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
382 (long long)NFS_FILEID(inode),
383 atomic_read(&inode->i_count));
389 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
393 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
396 nfs_setattr(struct dentry *dentry, struct iattr *attr)
398 struct inode *inode = dentry->d_inode;
399 struct nfs_fattr *fattr;
402 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
404 /* skip mode change if it's just for clearing setuid/setgid */
405 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
406 attr->ia_valid &= ~ATTR_MODE;
408 if (attr->ia_valid & ATTR_SIZE) {
409 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
410 attr->ia_valid &= ~ATTR_SIZE;
413 /* Optimization: if the end result is no change, don't RPC */
414 attr->ia_valid &= NFS_VALID_ATTRS;
415 if ((attr->ia_valid & ~ATTR_FILE) == 0)
418 /* Write all dirty data */
419 if (S_ISREG(inode->i_mode))
422 fattr = nfs_alloc_fattr();
426 * Return any delegations if we're going to change ACLs
428 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
429 nfs_inode_return_delegation(inode);
430 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
432 nfs_refresh_inode(inode, fattr);
433 nfs_free_fattr(fattr);
439 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
440 * @inode: inode of the file used
441 * @offset: file offset to start truncating
443 * This is a copy of the common vmtruncate, but with the locking
444 * corrected to take into account the fact that NFS requires
445 * inode->i_size to be updated under the inode->i_lock.
447 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
452 err = inode_newsize_ok(inode, offset);
456 spin_lock(&inode->i_lock);
457 oldsize = inode->i_size;
458 i_size_write(inode, offset);
459 spin_unlock(&inode->i_lock);
461 truncate_pagecache(inode, oldsize, offset);
467 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
468 * @inode: pointer to struct inode
469 * @attr: pointer to struct iattr
471 * Note: we do this in the *proc.c in order to ensure that
472 * it works for things like exclusive creates too.
474 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
476 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
477 spin_lock(&inode->i_lock);
478 if ((attr->ia_valid & ATTR_MODE) != 0) {
479 int mode = attr->ia_mode & S_IALLUGO;
480 mode |= inode->i_mode & ~S_IALLUGO;
481 inode->i_mode = mode;
483 if ((attr->ia_valid & ATTR_UID) != 0)
484 inode->i_uid = attr->ia_uid;
485 if ((attr->ia_valid & ATTR_GID) != 0)
486 inode->i_gid = attr->ia_gid;
487 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
488 spin_unlock(&inode->i_lock);
490 if ((attr->ia_valid & ATTR_SIZE) != 0) {
491 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
492 nfs_vmtruncate(inode, attr->ia_size);
496 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
498 struct inode *inode = dentry->d_inode;
499 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
502 /* Flush out writes to the server in order to update c/mtime. */
503 if (S_ISREG(inode->i_mode)) {
504 err = filemap_write_and_wait(inode->i_mapping);
510 * We may force a getattr if the user cares about atime.
512 * Note that we only have to check the vfsmount flags here:
513 * - NFS always sets S_NOATIME by so checking it would give a
515 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
516 * no point in checking those.
518 if ((mnt->mnt_flags & MNT_NOATIME) ||
519 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
523 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
525 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
527 generic_fillattr(inode, stat);
528 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
534 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
536 atomic_set(&l_ctx->count, 1);
537 l_ctx->lockowner = current->files;
538 l_ctx->pid = current->tgid;
539 INIT_LIST_HEAD(&l_ctx->list);
542 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
544 struct nfs_lock_context *pos;
546 list_for_each_entry(pos, &ctx->lock_context.list, list) {
547 if (pos->lockowner != current->files)
549 if (pos->pid != current->tgid)
551 atomic_inc(&pos->count);
557 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
559 struct nfs_lock_context *res, *new = NULL;
560 struct inode *inode = ctx->path.dentry->d_inode;
562 spin_lock(&inode->i_lock);
563 res = __nfs_find_lock_context(ctx);
565 spin_unlock(&inode->i_lock);
566 new = kmalloc(sizeof(*new), GFP_KERNEL);
569 nfs_init_lock_context(new);
570 spin_lock(&inode->i_lock);
571 res = __nfs_find_lock_context(ctx);
573 list_add_tail(&new->list, &ctx->lock_context.list);
574 new->open_context = ctx;
579 spin_unlock(&inode->i_lock);
584 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
586 struct nfs_open_context *ctx = l_ctx->open_context;
587 struct inode *inode = ctx->path.dentry->d_inode;
589 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
591 list_del(&l_ctx->list);
592 spin_unlock(&inode->i_lock);
597 * nfs_close_context - Common close_context() routine NFSv2/v3
598 * @ctx: pointer to context
599 * @is_sync: is this a synchronous close
601 * always ensure that the attributes are up to date if we're mounted
602 * with close-to-open semantics
604 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
607 struct nfs_server *server;
609 if (!(ctx->mode & FMODE_WRITE))
613 inode = ctx->path.dentry->d_inode;
614 if (!list_empty(&NFS_I(inode)->open_files))
616 server = NFS_SERVER(inode);
617 if (server->flags & NFS_MOUNT_NOCTO)
619 nfs_revalidate_inode(server, inode);
622 struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred, fmode_t f_mode)
624 struct nfs_open_context *ctx;
626 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
629 path_get(&ctx->path);
630 ctx->cred = get_rpccred(cred);
636 nfs_init_lock_context(&ctx->lock_context);
637 ctx->lock_context.open_context = ctx;
638 INIT_LIST_HEAD(&ctx->list);
643 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
646 atomic_inc(&ctx->lock_context.count);
650 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
652 struct inode *inode = ctx->path.dentry->d_inode;
654 if (!list_empty(&ctx->list)) {
655 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
657 list_del(&ctx->list);
658 spin_unlock(&inode->i_lock);
659 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
662 NFS_PROTO(inode)->close_context(ctx, is_sync);
663 if (ctx->cred != NULL)
664 put_rpccred(ctx->cred);
665 path_put(&ctx->path);
669 void put_nfs_open_context(struct nfs_open_context *ctx)
671 __put_nfs_open_context(ctx, 0);
675 * Ensure that mmap has a recent RPC credential for use when writing out
678 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
680 struct inode *inode = filp->f_path.dentry->d_inode;
681 struct nfs_inode *nfsi = NFS_I(inode);
683 filp->private_data = get_nfs_open_context(ctx);
684 spin_lock(&inode->i_lock);
685 list_add(&ctx->list, &nfsi->open_files);
686 spin_unlock(&inode->i_lock);
690 * Given an inode, search for an open context with the desired characteristics
692 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
694 struct nfs_inode *nfsi = NFS_I(inode);
695 struct nfs_open_context *pos, *ctx = NULL;
697 spin_lock(&inode->i_lock);
698 list_for_each_entry(pos, &nfsi->open_files, list) {
699 if (cred != NULL && pos->cred != cred)
701 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
703 ctx = get_nfs_open_context(pos);
706 spin_unlock(&inode->i_lock);
710 static void nfs_file_clear_open_context(struct file *filp)
712 struct inode *inode = filp->f_path.dentry->d_inode;
713 struct nfs_open_context *ctx = nfs_file_open_context(filp);
716 filp->private_data = NULL;
717 spin_lock(&inode->i_lock);
718 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
719 spin_unlock(&inode->i_lock);
720 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
725 * These allocate and release file read/write context information.
727 int nfs_open(struct inode *inode, struct file *filp)
729 struct nfs_open_context *ctx;
730 struct rpc_cred *cred;
732 cred = rpc_lookup_cred();
734 return PTR_ERR(cred);
735 ctx = alloc_nfs_open_context(&filp->f_path, cred, filp->f_mode);
739 nfs_file_set_open_context(filp, ctx);
740 put_nfs_open_context(ctx);
741 nfs_fscache_set_inode_cookie(inode, filp);
745 int nfs_release(struct inode *inode, struct file *filp)
747 nfs_file_clear_open_context(filp);
752 * This function is called whenever some part of NFS notices that
753 * the cached attributes have to be refreshed.
756 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
758 int status = -ESTALE;
759 struct nfs_fattr *fattr = NULL;
760 struct nfs_inode *nfsi = NFS_I(inode);
762 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
763 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
765 if (is_bad_inode(inode))
767 if (NFS_STALE(inode))
771 fattr = nfs_alloc_fattr();
775 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
776 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
778 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
780 (long long)NFS_FILEID(inode), status);
781 if (status == -ESTALE) {
782 nfs_zap_caches(inode);
783 if (!S_ISDIR(inode->i_mode))
784 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
789 status = nfs_refresh_inode(inode, fattr);
791 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
793 (long long)NFS_FILEID(inode), status);
797 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
798 nfs_zap_acl_cache(inode);
800 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
802 (long long)NFS_FILEID(inode));
805 nfs_free_fattr(fattr);
809 int nfs_attribute_timeout(struct inode *inode)
811 struct nfs_inode *nfsi = NFS_I(inode);
813 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
816 static int nfs_attribute_cache_expired(struct inode *inode)
818 if (nfs_have_delegated_attributes(inode))
820 return nfs_attribute_timeout(inode);
824 * nfs_revalidate_inode - Revalidate the inode attributes
825 * @server - pointer to nfs_server struct
826 * @inode - pointer to inode struct
828 * Updates inode attribute information by retrieving the data from the server.
830 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
832 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
833 && !nfs_attribute_cache_expired(inode))
834 return NFS_STALE(inode) ? -ESTALE : 0;
835 return __nfs_revalidate_inode(server, inode);
838 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
840 struct nfs_inode *nfsi = NFS_I(inode);
842 if (mapping->nrpages != 0) {
843 int ret = invalidate_inode_pages2(mapping);
847 spin_lock(&inode->i_lock);
848 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
849 if (S_ISDIR(inode->i_mode))
850 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
851 spin_unlock(&inode->i_lock);
852 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
853 nfs_fscache_reset_inode_cookie(inode);
854 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
855 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
860 * nfs_revalidate_mapping - Revalidate the pagecache
861 * @inode - pointer to host inode
862 * @mapping - pointer to mapping
864 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
866 struct nfs_inode *nfsi = NFS_I(inode);
869 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
870 || nfs_attribute_cache_expired(inode)
871 || NFS_STALE(inode)) {
872 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
876 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
877 ret = nfs_invalidate_mapping(inode, mapping);
882 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
884 struct nfs_inode *nfsi = NFS_I(inode);
886 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
887 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
888 && nfsi->change_attr == fattr->pre_change_attr) {
889 nfsi->change_attr = fattr->change_attr;
890 if (S_ISDIR(inode->i_mode))
891 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
893 /* If we have atomic WCC data, we may update some attributes */
894 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
895 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
896 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
897 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
899 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
900 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
901 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
902 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
903 if (S_ISDIR(inode->i_mode))
904 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
906 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
907 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
908 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
909 && nfsi->npages == 0)
910 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
914 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
915 * @inode - pointer to inode
916 * @fattr - updated attributes
918 * Verifies the attribute cache. If we have just changed the attributes,
919 * so that fattr carries weak cache consistency data, then it may
920 * also update the ctime/mtime/change_attribute.
922 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
924 struct nfs_inode *nfsi = NFS_I(inode);
925 loff_t cur_size, new_isize;
926 unsigned long invalid = 0;
929 /* Has the inode gone and changed behind our back? */
930 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
932 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
935 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
936 nfsi->change_attr != fattr->change_attr)
937 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
939 /* Verify a few of the more important attributes */
940 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
941 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
943 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
944 cur_size = i_size_read(inode);
945 new_isize = nfs_size_to_loff_t(fattr->size);
946 if (cur_size != new_isize && nfsi->npages == 0)
947 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
950 /* Have any file permissions changed? */
951 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
952 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
953 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
954 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
955 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
956 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
958 /* Has the link count changed? */
959 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
960 invalid |= NFS_INO_INVALID_ATTR;
962 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
963 invalid |= NFS_INO_INVALID_ATIME;
966 nfsi->cache_validity |= invalid;
968 nfsi->read_cache_jiffies = fattr->time_start;
972 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
974 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
976 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
979 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
981 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
983 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
986 static atomic_long_t nfs_attr_generation_counter;
988 static unsigned long nfs_read_attr_generation_counter(void)
990 return atomic_long_read(&nfs_attr_generation_counter);
993 unsigned long nfs_inc_attr_generation_counter(void)
995 return atomic_long_inc_return(&nfs_attr_generation_counter);
998 void nfs_fattr_init(struct nfs_fattr *fattr)
1001 fattr->time_start = jiffies;
1002 fattr->gencount = nfs_inc_attr_generation_counter();
1005 struct nfs_fattr *nfs_alloc_fattr(void)
1007 struct nfs_fattr *fattr;
1009 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1011 nfs_fattr_init(fattr);
1015 struct nfs_fh *nfs_alloc_fhandle(void)
1019 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1026 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1027 * @inode - pointer to inode
1028 * @fattr - attributes
1030 * Attempt to divine whether or not an RPC call reply carrying stale
1031 * attributes got scheduled after another call carrying updated ones.
1033 * To do so, the function first assumes that a more recent ctime means
1034 * that the attributes in fattr are newer, however it also attempt to
1035 * catch the case where ctime either didn't change, or went backwards
1036 * (if someone reset the clock on the server) by looking at whether
1037 * or not this RPC call was started after the inode was last updated.
1038 * Note also the check for wraparound of 'attr_gencount'
1040 * The function returns 'true' if it thinks the attributes in 'fattr' are
1041 * more recent than the ones cached in the inode.
1044 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1046 const struct nfs_inode *nfsi = NFS_I(inode);
1048 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1049 nfs_ctime_need_update(inode, fattr) ||
1050 nfs_size_need_update(inode, fattr) ||
1051 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1054 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1056 if (nfs_inode_attrs_need_update(inode, fattr))
1057 return nfs_update_inode(inode, fattr);
1058 return nfs_check_inode_attributes(inode, fattr);
1062 * nfs_refresh_inode - try to update the inode attribute cache
1063 * @inode - pointer to inode
1064 * @fattr - updated attributes
1066 * Check that an RPC call that returned attributes has not overlapped with
1067 * other recent updates of the inode metadata, then decide whether it is
1068 * safe to do a full update of the inode attributes, or whether just to
1069 * call nfs_check_inode_attributes.
1071 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1075 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1077 spin_lock(&inode->i_lock);
1078 status = nfs_refresh_inode_locked(inode, fattr);
1079 spin_unlock(&inode->i_lock);
1084 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1086 struct nfs_inode *nfsi = NFS_I(inode);
1088 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1089 if (S_ISDIR(inode->i_mode))
1090 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1091 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1093 return nfs_refresh_inode_locked(inode, fattr);
1097 * nfs_post_op_update_inode - try to update the inode attribute cache
1098 * @inode - pointer to inode
1099 * @fattr - updated attributes
1101 * After an operation that has changed the inode metadata, mark the
1102 * attribute cache as being invalid, then try to update it.
1104 * NB: if the server didn't return any post op attributes, this
1105 * function will force the retrieval of attributes before the next
1106 * NFS request. Thus it should be used only for operations that
1107 * are expected to change one or more attributes, to avoid
1108 * unnecessary NFS requests and trips through nfs_update_inode().
1110 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1114 spin_lock(&inode->i_lock);
1115 status = nfs_post_op_update_inode_locked(inode, fattr);
1116 spin_unlock(&inode->i_lock);
1121 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1122 * @inode - pointer to inode
1123 * @fattr - updated attributes
1125 * After an operation that has changed the inode metadata, mark the
1126 * attribute cache as being invalid, then try to update it. Fake up
1127 * weak cache consistency data, if none exist.
1129 * This function is mainly designed to be used by the ->write_done() functions.
1131 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1135 spin_lock(&inode->i_lock);
1136 /* Don't do a WCC update if these attributes are already stale */
1137 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1138 !nfs_inode_attrs_need_update(inode, fattr)) {
1139 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1140 | NFS_ATTR_FATTR_PRESIZE
1141 | NFS_ATTR_FATTR_PREMTIME
1142 | NFS_ATTR_FATTR_PRECTIME);
1145 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1146 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1147 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1148 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1150 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1151 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1152 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1153 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1155 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1156 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1157 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1158 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1160 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1161 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1162 fattr->pre_size = i_size_read(inode);
1163 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1166 status = nfs_post_op_update_inode_locked(inode, fattr);
1167 spin_unlock(&inode->i_lock);
1172 * Many nfs protocol calls return the new file attributes after
1173 * an operation. Here we update the inode to reflect the state
1174 * of the server's inode.
1176 * This is a bit tricky because we have to make sure all dirty pages
1177 * have been sent off to the server before calling invalidate_inode_pages.
1178 * To make sure no other process adds more write requests while we try
1179 * our best to flush them, we make them sleep during the attribute refresh.
1181 * A very similar scenario holds for the dir cache.
1183 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1185 struct nfs_server *server;
1186 struct nfs_inode *nfsi = NFS_I(inode);
1187 loff_t cur_isize, new_isize;
1188 unsigned long invalid = 0;
1189 unsigned long now = jiffies;
1190 unsigned long save_cache_validity;
1192 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1193 __func__, inode->i_sb->s_id, inode->i_ino,
1194 atomic_read(&inode->i_count), fattr->valid);
1196 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1200 * Make sure the inode's type hasn't changed.
1202 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1205 server = NFS_SERVER(inode);
1206 /* Update the fsid? */
1207 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1208 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1209 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1210 server->fsid = fattr->fsid;
1213 * Update the read time so we don't revalidate too often.
1215 nfsi->read_cache_jiffies = fattr->time_start;
1217 save_cache_validity = nfsi->cache_validity;
1218 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1219 | NFS_INO_INVALID_ATIME
1220 | NFS_INO_REVAL_FORCED
1221 | NFS_INO_REVAL_PAGECACHE);
1223 /* Do atomic weak cache consistency updates */
1224 nfs_wcc_update_inode(inode, fattr);
1226 /* More cache consistency checks */
1227 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1228 if (nfsi->change_attr != fattr->change_attr) {
1229 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1230 inode->i_sb->s_id, inode->i_ino);
1231 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1232 if (S_ISDIR(inode->i_mode))
1233 nfs_force_lookup_revalidate(inode);
1234 nfsi->change_attr = fattr->change_attr;
1236 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1237 invalid |= save_cache_validity;
1239 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1240 /* NFSv2/v3: Check if the mtime agrees */
1241 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1242 dprintk("NFS: mtime change on server for file %s/%ld\n",
1243 inode->i_sb->s_id, inode->i_ino);
1244 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1245 if (S_ISDIR(inode->i_mode))
1246 nfs_force_lookup_revalidate(inode);
1247 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1249 } else if (server->caps & NFS_CAP_MTIME)
1250 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1251 | NFS_INO_INVALID_DATA
1252 | NFS_INO_REVAL_PAGECACHE
1253 | NFS_INO_REVAL_FORCED);
1255 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1256 /* If ctime has changed we should definitely clear access+acl caches */
1257 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1258 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1259 /* and probably clear data for a directory too as utimes can cause
1260 * havoc with our cache.
1262 if (S_ISDIR(inode->i_mode)) {
1263 invalid |= NFS_INO_INVALID_DATA;
1264 nfs_force_lookup_revalidate(inode);
1266 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1268 } else if (server->caps & NFS_CAP_CTIME)
1269 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1270 | NFS_INO_INVALID_ACCESS
1271 | NFS_INO_INVALID_ACL
1272 | NFS_INO_REVAL_FORCED);
1274 /* Check if our cached file size is stale */
1275 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1276 new_isize = nfs_size_to_loff_t(fattr->size);
1277 cur_isize = i_size_read(inode);
1278 if (new_isize != cur_isize) {
1279 /* Do we perhaps have any outstanding writes, or has
1280 * the file grown beyond our last write? */
1281 if (nfsi->npages == 0 || new_isize > cur_isize) {
1282 i_size_write(inode, new_isize);
1283 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1285 dprintk("NFS: isize change on server for file %s/%ld\n",
1286 inode->i_sb->s_id, inode->i_ino);
1289 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1290 | NFS_INO_REVAL_PAGECACHE
1291 | NFS_INO_REVAL_FORCED);
1294 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1295 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1296 else if (server->caps & NFS_CAP_ATIME)
1297 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1298 | NFS_INO_REVAL_FORCED);
1300 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1301 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1302 umode_t newmode = inode->i_mode & S_IFMT;
1303 newmode |= fattr->mode & S_IALLUGO;
1304 inode->i_mode = newmode;
1305 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1307 } else if (server->caps & NFS_CAP_MODE)
1308 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1309 | NFS_INO_INVALID_ACCESS
1310 | NFS_INO_INVALID_ACL
1311 | NFS_INO_REVAL_FORCED);
1313 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1314 if (inode->i_uid != fattr->uid) {
1315 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1316 inode->i_uid = fattr->uid;
1318 } else if (server->caps & NFS_CAP_OWNER)
1319 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1320 | NFS_INO_INVALID_ACCESS
1321 | NFS_INO_INVALID_ACL
1322 | NFS_INO_REVAL_FORCED);
1324 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1325 if (inode->i_gid != fattr->gid) {
1326 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1327 inode->i_gid = fattr->gid;
1329 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1330 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1331 | NFS_INO_INVALID_ACCESS
1332 | NFS_INO_INVALID_ACL
1333 | NFS_INO_REVAL_FORCED);
1335 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1336 if (inode->i_nlink != fattr->nlink) {
1337 invalid |= NFS_INO_INVALID_ATTR;
1338 if (S_ISDIR(inode->i_mode))
1339 invalid |= NFS_INO_INVALID_DATA;
1340 inode->i_nlink = fattr->nlink;
1342 } else if (server->caps & NFS_CAP_NLINK)
1343 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1344 | NFS_INO_REVAL_FORCED);
1346 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1348 * report the blocks in 512byte units
1350 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1352 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1353 inode->i_blocks = fattr->du.nfs2.blocks;
1355 /* Update attrtimeo value if we're out of the unstable period */
1356 if (invalid & NFS_INO_INVALID_ATTR) {
1357 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1358 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1359 nfsi->attrtimeo_timestamp = now;
1360 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1362 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1363 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1364 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1365 nfsi->attrtimeo_timestamp = now;
1368 invalid &= ~NFS_INO_INVALID_ATTR;
1369 /* Don't invalidate the data if we were to blame */
1370 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1371 || S_ISLNK(inode->i_mode)))
1372 invalid &= ~NFS_INO_INVALID_DATA;
1373 if (!nfs_have_delegation(inode, FMODE_READ) ||
1374 (save_cache_validity & NFS_INO_REVAL_FORCED))
1375 nfsi->cache_validity |= invalid;
1380 * Big trouble! The inode has become a different object.
1382 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1383 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1386 * No need to worry about unhashing the dentry, as the
1387 * lookup validation will know that the inode is bad.
1388 * (But we fall through to invalidate the caches.)
1390 nfs_invalidate_inode(inode);
1394 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1395 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1396 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1397 (long long)nfsi->fileid, (long long)fattr->fileid);
1402 #ifdef CONFIG_NFS_V4
1405 * Clean out any remaining NFSv4 state that might be left over due
1406 * to open() calls that passed nfs_atomic_lookup, but failed to call
1409 void nfs4_evict_inode(struct inode *inode)
1411 truncate_inode_pages(&inode->i_data, 0);
1412 end_writeback(inode);
1413 /* If we are holding a delegation, return it! */
1414 nfs_inode_return_delegation_noreclaim(inode);
1415 /* First call standard NFS clear_inode() code */
1416 nfs_clear_inode(inode);
1420 struct inode *nfs_alloc_inode(struct super_block *sb)
1422 struct nfs_inode *nfsi;
1423 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1427 nfsi->cache_validity = 0UL;
1428 #ifdef CONFIG_NFS_V3_ACL
1429 nfsi->acl_access = ERR_PTR(-EAGAIN);
1430 nfsi->acl_default = ERR_PTR(-EAGAIN);
1432 #ifdef CONFIG_NFS_V4
1433 nfsi->nfs4_acl = NULL;
1434 #endif /* CONFIG_NFS_V4 */
1435 return &nfsi->vfs_inode;
1438 void nfs_destroy_inode(struct inode *inode)
1440 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1443 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1445 #ifdef CONFIG_NFS_V4
1446 INIT_LIST_HEAD(&nfsi->open_states);
1447 nfsi->delegation = NULL;
1448 nfsi->delegation_state = 0;
1449 init_rwsem(&nfsi->rwsem);
1453 static void init_once(void *foo)
1455 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1457 inode_init_once(&nfsi->vfs_inode);
1458 INIT_LIST_HEAD(&nfsi->open_files);
1459 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1460 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1461 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1464 atomic_set(&nfsi->silly_count, 1);
1465 INIT_HLIST_HEAD(&nfsi->silly_list);
1466 init_waitqueue_head(&nfsi->waitqueue);
1467 nfs4_init_once(nfsi);
1470 static int __init nfs_init_inodecache(void)
1472 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1473 sizeof(struct nfs_inode),
1474 0, (SLAB_RECLAIM_ACCOUNT|
1477 if (nfs_inode_cachep == NULL)
1483 static void nfs_destroy_inodecache(void)
1485 kmem_cache_destroy(nfs_inode_cachep);
1488 struct workqueue_struct *nfsiod_workqueue;
1491 * start up the nfsiod workqueue
1493 static int nfsiod_start(void)
1495 struct workqueue_struct *wq;
1496 dprintk("RPC: creating workqueue nfsiod\n");
1497 wq = alloc_workqueue("nfsiod", WQ_RESCUER, 0);
1500 nfsiod_workqueue = wq;
1505 * Destroy the nfsiod workqueue
1507 static void nfsiod_stop(void)
1509 struct workqueue_struct *wq;
1511 wq = nfsiod_workqueue;
1514 nfsiod_workqueue = NULL;
1515 destroy_workqueue(wq);
1521 static int __init init_nfs_fs(void)
1525 err = nfs_idmap_init();
1529 err = nfs_dns_resolver_init();
1533 err = nfs_fscache_register();
1537 err = nfsiod_start();
1541 err = nfs_fs_proc_init();
1545 err = nfs_init_nfspagecache();
1549 err = nfs_init_inodecache();
1553 err = nfs_init_readpagecache();
1557 err = nfs_init_writepagecache();
1561 err = nfs_init_directcache();
1565 #ifdef CONFIG_PROC_FS
1566 rpc_proc_register(&nfs_rpcstat);
1568 if ((err = register_nfs_fs()) != 0)
1572 #ifdef CONFIG_PROC_FS
1573 rpc_proc_unregister("nfs");
1575 nfs_destroy_directcache();
1577 nfs_destroy_writepagecache();
1579 nfs_destroy_readpagecache();
1581 nfs_destroy_inodecache();
1583 nfs_destroy_nfspagecache();
1589 nfs_fscache_unregister();
1591 nfs_dns_resolver_destroy();
1598 static void __exit exit_nfs_fs(void)
1600 nfs_destroy_directcache();
1601 nfs_destroy_writepagecache();
1602 nfs_destroy_readpagecache();
1603 nfs_destroy_inodecache();
1604 nfs_destroy_nfspagecache();
1605 nfs_fscache_unregister();
1606 nfs_dns_resolver_destroy();
1608 #ifdef CONFIG_PROC_FS
1609 rpc_proc_unregister("nfs");
1611 unregister_nfs_fs();
1616 /* Not quite true; I just maintain it */
1617 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1618 MODULE_LICENSE("GPL");
1619 module_param(enable_ino64, bool, 0644);
1621 module_init(init_nfs_fs)
1622 module_exit(exit_nfs_fs)