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>
40 #include <linux/compat.h>
41 #include <linux/freezer.h>
43 #include <asm/system.h>
44 #include <asm/uaccess.h>
48 #include "delegation.h"
52 #include "dns_resolve.h"
55 #define NFSDBG_FACILITY NFSDBG_VFS
57 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
59 /* Default is to see 64-bit inode numbers */
60 static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
62 static void nfs_invalidate_inode(struct inode *);
63 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
65 static struct kmem_cache * nfs_inode_cachep;
67 static inline unsigned long
68 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
70 return nfs_fileid_to_ino_t(fattr->fileid);
74 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
75 * @word: long word containing the bit lock
77 int nfs_wait_bit_killable(void *word)
79 if (fatal_signal_pending(current))
86 * nfs_compat_user_ino64 - returns the user-visible inode number
87 * @fileid: 64-bit fileid
89 * This function returns a 32-bit inode number if the boot parameter
90 * nfs.enable_ino64 is zero.
92 u64 nfs_compat_user_ino64(u64 fileid)
103 if (sizeof(ino) < sizeof(fileid))
104 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
108 static void nfs_clear_inode(struct inode *inode)
111 * The following should never happen...
113 BUG_ON(nfs_have_writebacks(inode));
114 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
115 nfs_zap_acl_cache(inode);
116 nfs_access_zap_cache(inode);
117 nfs_fscache_release_inode_cookie(inode);
120 void nfs_evict_inode(struct inode *inode)
122 truncate_inode_pages(&inode->i_data, 0);
123 end_writeback(inode);
124 nfs_clear_inode(inode);
128 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
130 int nfs_sync_mapping(struct address_space *mapping)
134 if (mapping->nrpages != 0) {
135 unmap_mapping_range(mapping, 0, 0, 0);
136 ret = nfs_wb_all(mapping->host);
142 * Invalidate the local caches
144 static void nfs_zap_caches_locked(struct inode *inode)
146 struct nfs_inode *nfsi = NFS_I(inode);
147 int mode = inode->i_mode;
149 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
151 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
152 nfsi->attrtimeo_timestamp = jiffies;
154 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
155 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
156 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
158 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
161 void nfs_zap_caches(struct inode *inode)
163 spin_lock(&inode->i_lock);
164 nfs_zap_caches_locked(inode);
165 spin_unlock(&inode->i_lock);
168 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
170 if (mapping->nrpages != 0) {
171 spin_lock(&inode->i_lock);
172 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
173 spin_unlock(&inode->i_lock);
177 void nfs_zap_acl_cache(struct inode *inode)
179 void (*clear_acl_cache)(struct inode *);
181 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
182 if (clear_acl_cache != NULL)
183 clear_acl_cache(inode);
184 spin_lock(&inode->i_lock);
185 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
186 spin_unlock(&inode->i_lock);
189 void nfs_invalidate_atime(struct inode *inode)
191 spin_lock(&inode->i_lock);
192 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
193 spin_unlock(&inode->i_lock);
197 * Invalidate, but do not unhash, the inode.
198 * NB: must be called with inode->i_lock held!
200 static void nfs_invalidate_inode(struct inode *inode)
202 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
203 nfs_zap_caches_locked(inode);
206 struct nfs_find_desc {
208 struct nfs_fattr *fattr;
212 * In NFSv3 we can have 64bit inode numbers. In order to support
213 * this, and re-exported directories (also seen in NFSv2)
214 * we are forced to allow 2 different inodes to have the same
218 nfs_find_actor(struct inode *inode, void *opaque)
220 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
221 struct nfs_fh *fh = desc->fh;
222 struct nfs_fattr *fattr = desc->fattr;
224 if (NFS_FILEID(inode) != fattr->fileid)
226 if (nfs_compare_fh(NFS_FH(inode), fh))
228 if (is_bad_inode(inode) || NFS_STALE(inode))
234 nfs_init_locked(struct inode *inode, void *opaque)
236 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
237 struct nfs_fattr *fattr = desc->fattr;
239 set_nfs_fileid(inode, fattr->fileid);
240 nfs_copy_fh(NFS_FH(inode), desc->fh);
245 * This is our front-end to iget that looks up inodes by file handle
246 * instead of inode number.
249 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
251 struct nfs_find_desc desc = {
255 struct inode *inode = ERR_PTR(-ENOENT);
258 nfs_attr_check_mountpoint(sb, fattr);
260 if (((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0) &&
261 !nfs_attr_use_mounted_on_fileid(fattr))
263 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
266 hash = nfs_fattr_to_ino_t(fattr);
268 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
270 inode = ERR_PTR(-ENOMEM);
274 if (inode->i_state & I_NEW) {
275 struct nfs_inode *nfsi = NFS_I(inode);
276 unsigned long now = jiffies;
278 /* We set i_ino for the few things that still rely on it,
282 /* We can't support update_atime(), since the server will reset it */
283 inode->i_flags |= S_NOATIME|S_NOCMTIME;
284 inode->i_mode = fattr->mode;
285 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
286 && nfs_server_capable(inode, NFS_CAP_MODE))
287 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
288 | NFS_INO_INVALID_ACCESS
289 | NFS_INO_INVALID_ACL;
290 /* Why so? Because we want revalidate for devices/FIFOs, and
291 * that's precisely what we have in nfs_file_inode_operations.
293 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
294 if (S_ISREG(inode->i_mode)) {
295 inode->i_fop = NFS_SB(sb)->nfs_client->rpc_ops->file_ops;
296 inode->i_data.a_ops = &nfs_file_aops;
297 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
298 } else if (S_ISDIR(inode->i_mode)) {
299 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
300 inode->i_fop = &nfs_dir_operations;
301 inode->i_data.a_ops = &nfs_dir_aops;
302 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS))
303 set_bit(NFS_INO_ADVISE_RDPLUS, &NFS_I(inode)->flags);
304 /* Deal with crossing mountpoints */
305 if (fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT ||
306 fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) {
307 if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
308 inode->i_op = &nfs_referral_inode_operations;
310 inode->i_op = &nfs_mountpoint_inode_operations;
312 inode->i_flags |= S_AUTOMOUNT;
314 } else if (S_ISLNK(inode->i_mode))
315 inode->i_op = &nfs_symlink_inode_operations;
317 init_special_inode(inode, inode->i_mode, fattr->rdev);
319 memset(&inode->i_atime, 0, sizeof(inode->i_atime));
320 memset(&inode->i_mtime, 0, sizeof(inode->i_mtime));
321 memset(&inode->i_ctime, 0, sizeof(inode->i_ctime));
322 inode->i_version = 0;
328 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
330 nfsi->read_cache_jiffies = fattr->time_start;
331 nfsi->attr_gencount = fattr->gencount;
332 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
333 inode->i_atime = fattr->atime;
334 else if (nfs_server_capable(inode, NFS_CAP_ATIME))
335 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
336 if (fattr->valid & NFS_ATTR_FATTR_MTIME)
337 inode->i_mtime = fattr->mtime;
338 else if (nfs_server_capable(inode, NFS_CAP_MTIME))
339 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
340 | NFS_INO_INVALID_DATA;
341 if (fattr->valid & NFS_ATTR_FATTR_CTIME)
342 inode->i_ctime = fattr->ctime;
343 else if (nfs_server_capable(inode, NFS_CAP_CTIME))
344 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
345 | NFS_INO_INVALID_ACCESS
346 | NFS_INO_INVALID_ACL;
347 if (fattr->valid & NFS_ATTR_FATTR_CHANGE)
348 inode->i_version = fattr->change_attr;
349 else if (nfs_server_capable(inode, NFS_CAP_CHANGE_ATTR))
350 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
351 | NFS_INO_INVALID_DATA;
352 if (fattr->valid & NFS_ATTR_FATTR_SIZE)
353 inode->i_size = nfs_size_to_loff_t(fattr->size);
355 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
356 | NFS_INO_INVALID_DATA
357 | NFS_INO_REVAL_PAGECACHE;
358 if (fattr->valid & NFS_ATTR_FATTR_NLINK)
359 set_nlink(inode, fattr->nlink);
360 else if (nfs_server_capable(inode, NFS_CAP_NLINK))
361 nfsi->cache_validity |= NFS_INO_INVALID_ATTR;
362 if (fattr->valid & NFS_ATTR_FATTR_OWNER)
363 inode->i_uid = fattr->uid;
364 else if (nfs_server_capable(inode, NFS_CAP_OWNER))
365 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
366 | NFS_INO_INVALID_ACCESS
367 | NFS_INO_INVALID_ACL;
368 if (fattr->valid & NFS_ATTR_FATTR_GROUP)
369 inode->i_gid = fattr->gid;
370 else if (nfs_server_capable(inode, NFS_CAP_OWNER_GROUP))
371 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
372 | NFS_INO_INVALID_ACCESS
373 | NFS_INO_INVALID_ACL;
374 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
375 inode->i_blocks = fattr->du.nfs2.blocks;
376 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
378 * report the blocks in 512byte units
380 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
382 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
383 nfsi->attrtimeo_timestamp = now;
384 nfsi->access_cache = RB_ROOT;
386 nfs_fscache_init_inode_cookie(inode);
388 unlock_new_inode(inode);
390 nfs_refresh_inode(inode, fattr);
391 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
393 (long long)NFS_FILEID(inode),
394 atomic_read(&inode->i_count));
400 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode));
404 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
407 nfs_setattr(struct dentry *dentry, struct iattr *attr)
409 struct inode *inode = dentry->d_inode;
410 struct nfs_fattr *fattr;
413 nfs_inc_stats(inode, NFSIOS_VFSSETATTR);
415 /* skip mode change if it's just for clearing setuid/setgid */
416 if (attr->ia_valid & (ATTR_KILL_SUID | ATTR_KILL_SGID))
417 attr->ia_valid &= ~ATTR_MODE;
419 if (attr->ia_valid & ATTR_SIZE) {
420 if (!S_ISREG(inode->i_mode) || attr->ia_size == i_size_read(inode))
421 attr->ia_valid &= ~ATTR_SIZE;
424 /* Optimization: if the end result is no change, don't RPC */
425 attr->ia_valid &= NFS_VALID_ATTRS;
426 if ((attr->ia_valid & ~ATTR_FILE) == 0)
429 /* Write all dirty data */
430 if (S_ISREG(inode->i_mode))
433 fattr = nfs_alloc_fattr();
437 * Return any delegations if we're going to change ACLs
439 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
440 nfs_inode_return_delegation(inode);
441 error = NFS_PROTO(inode)->setattr(dentry, fattr, attr);
443 nfs_refresh_inode(inode, fattr);
444 nfs_free_fattr(fattr);
450 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
451 * @inode: inode of the file used
452 * @offset: file offset to start truncating
454 * This is a copy of the common vmtruncate, but with the locking
455 * corrected to take into account the fact that NFS requires
456 * inode->i_size to be updated under the inode->i_lock.
458 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
463 err = inode_newsize_ok(inode, offset);
467 spin_lock(&inode->i_lock);
468 oldsize = inode->i_size;
469 i_size_write(inode, offset);
470 spin_unlock(&inode->i_lock);
472 truncate_pagecache(inode, oldsize, offset);
478 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
479 * @inode: pointer to struct inode
480 * @attr: pointer to struct iattr
482 * Note: we do this in the *proc.c in order to ensure that
483 * it works for things like exclusive creates too.
485 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
487 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
488 spin_lock(&inode->i_lock);
489 if ((attr->ia_valid & ATTR_MODE) != 0) {
490 int mode = attr->ia_mode & S_IALLUGO;
491 mode |= inode->i_mode & ~S_IALLUGO;
492 inode->i_mode = mode;
494 if ((attr->ia_valid & ATTR_UID) != 0)
495 inode->i_uid = attr->ia_uid;
496 if ((attr->ia_valid & ATTR_GID) != 0)
497 inode->i_gid = attr->ia_gid;
498 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
499 spin_unlock(&inode->i_lock);
501 if ((attr->ia_valid & ATTR_SIZE) != 0) {
502 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
503 nfs_vmtruncate(inode, attr->ia_size);
507 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
509 struct inode *inode = dentry->d_inode;
510 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
513 /* Flush out writes to the server in order to update c/mtime. */
514 if (S_ISREG(inode->i_mode)) {
515 err = filemap_write_and_wait(inode->i_mapping);
521 * We may force a getattr if the user cares about atime.
523 * Note that we only have to check the vfsmount flags here:
524 * - NFS always sets S_NOATIME by so checking it would give a
526 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
527 * no point in checking those.
529 if ((mnt->mnt_flags & MNT_NOATIME) ||
530 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
534 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
536 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
538 generic_fillattr(inode, stat);
539 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
545 static void nfs_init_lock_context(struct nfs_lock_context *l_ctx)
547 atomic_set(&l_ctx->count, 1);
548 l_ctx->lockowner = current->files;
549 l_ctx->pid = current->tgid;
550 INIT_LIST_HEAD(&l_ctx->list);
553 static struct nfs_lock_context *__nfs_find_lock_context(struct nfs_open_context *ctx)
555 struct nfs_lock_context *pos;
557 list_for_each_entry(pos, &ctx->lock_context.list, list) {
558 if (pos->lockowner != current->files)
560 if (pos->pid != current->tgid)
562 atomic_inc(&pos->count);
568 struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
570 struct nfs_lock_context *res, *new = NULL;
571 struct inode *inode = ctx->dentry->d_inode;
573 spin_lock(&inode->i_lock);
574 res = __nfs_find_lock_context(ctx);
576 spin_unlock(&inode->i_lock);
577 new = kmalloc(sizeof(*new), GFP_KERNEL);
580 nfs_init_lock_context(new);
581 spin_lock(&inode->i_lock);
582 res = __nfs_find_lock_context(ctx);
584 list_add_tail(&new->list, &ctx->lock_context.list);
585 new->open_context = ctx;
590 spin_unlock(&inode->i_lock);
595 void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
597 struct nfs_open_context *ctx = l_ctx->open_context;
598 struct inode *inode = ctx->dentry->d_inode;
600 if (!atomic_dec_and_lock(&l_ctx->count, &inode->i_lock))
602 list_del(&l_ctx->list);
603 spin_unlock(&inode->i_lock);
608 * nfs_close_context - Common close_context() routine NFSv2/v3
609 * @ctx: pointer to context
610 * @is_sync: is this a synchronous close
612 * always ensure that the attributes are up to date if we're mounted
613 * with close-to-open semantics
615 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
618 struct nfs_server *server;
620 if (!(ctx->mode & FMODE_WRITE))
624 inode = ctx->dentry->d_inode;
625 if (!list_empty(&NFS_I(inode)->open_files))
627 server = NFS_SERVER(inode);
628 if (server->flags & NFS_MOUNT_NOCTO)
630 nfs_revalidate_inode(server, inode);
633 struct nfs_open_context *alloc_nfs_open_context(struct dentry *dentry, fmode_t f_mode)
635 struct nfs_open_context *ctx;
636 struct rpc_cred *cred = rpc_lookup_cred();
638 return ERR_CAST(cred);
640 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
643 return ERR_PTR(-ENOMEM);
645 nfs_sb_active(dentry->d_sb);
646 ctx->dentry = dget(dentry);
652 nfs_init_lock_context(&ctx->lock_context);
653 ctx->lock_context.open_context = ctx;
654 INIT_LIST_HEAD(&ctx->list);
658 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
661 atomic_inc(&ctx->lock_context.count);
665 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
667 struct inode *inode = ctx->dentry->d_inode;
668 struct super_block *sb = ctx->dentry->d_sb;
670 if (!list_empty(&ctx->list)) {
671 if (!atomic_dec_and_lock(&ctx->lock_context.count, &inode->i_lock))
673 list_del(&ctx->list);
674 spin_unlock(&inode->i_lock);
675 } else if (!atomic_dec_and_test(&ctx->lock_context.count))
678 NFS_PROTO(inode)->close_context(ctx, is_sync);
679 if (ctx->cred != NULL)
680 put_rpccred(ctx->cred);
686 void put_nfs_open_context(struct nfs_open_context *ctx)
688 __put_nfs_open_context(ctx, 0);
692 * Ensure that mmap has a recent RPC credential for use when writing out
695 void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
697 struct inode *inode = filp->f_path.dentry->d_inode;
698 struct nfs_inode *nfsi = NFS_I(inode);
700 filp->private_data = get_nfs_open_context(ctx);
701 spin_lock(&inode->i_lock);
702 list_add(&ctx->list, &nfsi->open_files);
703 spin_unlock(&inode->i_lock);
707 * Given an inode, search for an open context with the desired characteristics
709 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
711 struct nfs_inode *nfsi = NFS_I(inode);
712 struct nfs_open_context *pos, *ctx = NULL;
714 spin_lock(&inode->i_lock);
715 list_for_each_entry(pos, &nfsi->open_files, list) {
716 if (cred != NULL && pos->cred != cred)
718 if ((pos->mode & (FMODE_READ|FMODE_WRITE)) != mode)
720 ctx = get_nfs_open_context(pos);
723 spin_unlock(&inode->i_lock);
727 static void nfs_file_clear_open_context(struct file *filp)
729 struct inode *inode = filp->f_path.dentry->d_inode;
730 struct nfs_open_context *ctx = nfs_file_open_context(filp);
733 filp->private_data = NULL;
734 spin_lock(&inode->i_lock);
735 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
736 spin_unlock(&inode->i_lock);
737 __put_nfs_open_context(ctx, filp->f_flags & O_DIRECT ? 0 : 1);
742 * These allocate and release file read/write context information.
744 int nfs_open(struct inode *inode, struct file *filp)
746 struct nfs_open_context *ctx;
748 ctx = alloc_nfs_open_context(filp->f_path.dentry, filp->f_mode);
751 nfs_file_set_open_context(filp, ctx);
752 put_nfs_open_context(ctx);
753 nfs_fscache_set_inode_cookie(inode, filp);
757 int nfs_release(struct inode *inode, struct file *filp)
759 nfs_file_clear_open_context(filp);
764 * This function is called whenever some part of NFS notices that
765 * the cached attributes have to be refreshed.
768 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
770 int status = -ESTALE;
771 struct nfs_fattr *fattr = NULL;
772 struct nfs_inode *nfsi = NFS_I(inode);
774 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
775 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
777 if (is_bad_inode(inode))
779 if (NFS_STALE(inode))
783 fattr = nfs_alloc_fattr();
787 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
788 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), fattr);
790 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
792 (long long)NFS_FILEID(inode), status);
793 if (status == -ESTALE) {
794 nfs_zap_caches(inode);
795 if (!S_ISDIR(inode->i_mode))
796 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
801 status = nfs_refresh_inode(inode, fattr);
803 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
805 (long long)NFS_FILEID(inode), status);
809 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
810 nfs_zap_acl_cache(inode);
812 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
814 (long long)NFS_FILEID(inode));
817 nfs_free_fattr(fattr);
821 int nfs_attribute_timeout(struct inode *inode)
823 struct nfs_inode *nfsi = NFS_I(inode);
825 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
828 static int nfs_attribute_cache_expired(struct inode *inode)
830 if (nfs_have_delegated_attributes(inode))
832 return nfs_attribute_timeout(inode);
836 * nfs_revalidate_inode - Revalidate the inode attributes
837 * @server - pointer to nfs_server struct
838 * @inode - pointer to inode struct
840 * Updates inode attribute information by retrieving the data from the server.
842 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
844 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
845 && !nfs_attribute_cache_expired(inode))
846 return NFS_STALE(inode) ? -ESTALE : 0;
847 return __nfs_revalidate_inode(server, inode);
850 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
852 struct nfs_inode *nfsi = NFS_I(inode);
854 if (mapping->nrpages != 0) {
855 int ret = invalidate_inode_pages2(mapping);
859 spin_lock(&inode->i_lock);
860 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
861 if (S_ISDIR(inode->i_mode))
862 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
863 spin_unlock(&inode->i_lock);
864 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
865 nfs_fscache_reset_inode_cookie(inode);
866 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
867 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
872 * nfs_revalidate_mapping - Revalidate the pagecache
873 * @inode - pointer to host inode
874 * @mapping - pointer to mapping
876 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
878 struct nfs_inode *nfsi = NFS_I(inode);
881 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
882 || nfs_attribute_cache_expired(inode)
883 || NFS_STALE(inode)) {
884 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
888 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
889 ret = nfs_invalidate_mapping(inode, mapping);
894 static unsigned long nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
896 struct nfs_inode *nfsi = NFS_I(inode);
897 unsigned long ret = 0;
899 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
900 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
901 && inode->i_version == fattr->pre_change_attr) {
902 inode->i_version = fattr->change_attr;
903 if (S_ISDIR(inode->i_mode))
904 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
905 ret |= NFS_INO_INVALID_ATTR;
907 /* If we have atomic WCC data, we may update some attributes */
908 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
909 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
910 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime)) {
911 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
912 ret |= NFS_INO_INVALID_ATTR;
915 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
916 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
917 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
918 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
919 if (S_ISDIR(inode->i_mode))
920 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
921 ret |= NFS_INO_INVALID_ATTR;
923 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
924 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
925 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
926 && nfsi->npages == 0) {
927 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
928 ret |= NFS_INO_INVALID_ATTR;
934 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
935 * @inode - pointer to inode
936 * @fattr - updated attributes
938 * Verifies the attribute cache. If we have just changed the attributes,
939 * so that fattr carries weak cache consistency data, then it may
940 * also update the ctime/mtime/change_attribute.
942 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
944 struct nfs_inode *nfsi = NFS_I(inode);
945 loff_t cur_size, new_isize;
946 unsigned long invalid = 0;
949 /* Has the inode gone and changed behind our back? */
950 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
952 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
955 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
956 inode->i_version != fattr->change_attr)
957 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
959 /* Verify a few of the more important attributes */
960 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
961 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
963 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
964 cur_size = i_size_read(inode);
965 new_isize = nfs_size_to_loff_t(fattr->size);
966 if (cur_size != new_isize && nfsi->npages == 0)
967 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
970 /* Have any file permissions changed? */
971 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
972 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
973 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
974 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
975 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
976 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
978 /* Has the link count changed? */
979 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
980 invalid |= NFS_INO_INVALID_ATTR;
982 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
983 invalid |= NFS_INO_INVALID_ATIME;
986 nfsi->cache_validity |= invalid;
988 nfsi->read_cache_jiffies = fattr->time_start;
992 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
994 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
996 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
999 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1001 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
1003 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
1006 static atomic_long_t nfs_attr_generation_counter;
1008 static unsigned long nfs_read_attr_generation_counter(void)
1010 return atomic_long_read(&nfs_attr_generation_counter);
1013 unsigned long nfs_inc_attr_generation_counter(void)
1015 return atomic_long_inc_return(&nfs_attr_generation_counter);
1018 void nfs_fattr_init(struct nfs_fattr *fattr)
1021 fattr->time_start = jiffies;
1022 fattr->gencount = nfs_inc_attr_generation_counter();
1025 struct nfs_fattr *nfs_alloc_fattr(void)
1027 struct nfs_fattr *fattr;
1029 fattr = kmalloc(sizeof(*fattr), GFP_NOFS);
1031 nfs_fattr_init(fattr);
1035 struct nfs_fh *nfs_alloc_fhandle(void)
1039 fh = kmalloc(sizeof(struct nfs_fh), GFP_NOFS);
1046 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1047 * @inode - pointer to inode
1048 * @fattr - attributes
1050 * Attempt to divine whether or not an RPC call reply carrying stale
1051 * attributes got scheduled after another call carrying updated ones.
1053 * To do so, the function first assumes that a more recent ctime means
1054 * that the attributes in fattr are newer, however it also attempt to
1055 * catch the case where ctime either didn't change, or went backwards
1056 * (if someone reset the clock on the server) by looking at whether
1057 * or not this RPC call was started after the inode was last updated.
1058 * Note also the check for wraparound of 'attr_gencount'
1060 * The function returns 'true' if it thinks the attributes in 'fattr' are
1061 * more recent than the ones cached in the inode.
1064 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
1066 const struct nfs_inode *nfsi = NFS_I(inode);
1068 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
1069 nfs_ctime_need_update(inode, fattr) ||
1070 nfs_size_need_update(inode, fattr) ||
1071 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1074 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1076 if (nfs_inode_attrs_need_update(inode, fattr))
1077 return nfs_update_inode(inode, fattr);
1078 return nfs_check_inode_attributes(inode, fattr);
1082 * nfs_refresh_inode - try to update the inode attribute cache
1083 * @inode - pointer to inode
1084 * @fattr - updated attributes
1086 * Check that an RPC call that returned attributes has not overlapped with
1087 * other recent updates of the inode metadata, then decide whether it is
1088 * safe to do a full update of the inode attributes, or whether just to
1089 * call nfs_check_inode_attributes.
1091 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1095 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1097 spin_lock(&inode->i_lock);
1098 status = nfs_refresh_inode_locked(inode, fattr);
1099 spin_unlock(&inode->i_lock);
1104 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1106 struct nfs_inode *nfsi = NFS_I(inode);
1108 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1109 if (S_ISDIR(inode->i_mode))
1110 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1111 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1113 return nfs_refresh_inode_locked(inode, fattr);
1117 * nfs_post_op_update_inode - try to update the inode attribute cache
1118 * @inode - pointer to inode
1119 * @fattr - updated attributes
1121 * After an operation that has changed the inode metadata, mark the
1122 * attribute cache as being invalid, then try to update it.
1124 * NB: if the server didn't return any post op attributes, this
1125 * function will force the retrieval of attributes before the next
1126 * NFS request. Thus it should be used only for operations that
1127 * are expected to change one or more attributes, to avoid
1128 * unnecessary NFS requests and trips through nfs_update_inode().
1130 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1134 spin_lock(&inode->i_lock);
1135 status = nfs_post_op_update_inode_locked(inode, fattr);
1136 spin_unlock(&inode->i_lock);
1141 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1142 * @inode - pointer to inode
1143 * @fattr - updated attributes
1145 * After an operation that has changed the inode metadata, mark the
1146 * attribute cache as being invalid, then try to update it. Fake up
1147 * weak cache consistency data, if none exist.
1149 * This function is mainly designed to be used by the ->write_done() functions.
1151 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1155 spin_lock(&inode->i_lock);
1156 /* Don't do a WCC update if these attributes are already stale */
1157 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1158 !nfs_inode_attrs_need_update(inode, fattr)) {
1159 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1160 | NFS_ATTR_FATTR_PRESIZE
1161 | NFS_ATTR_FATTR_PREMTIME
1162 | NFS_ATTR_FATTR_PRECTIME);
1165 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1166 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1167 fattr->pre_change_attr = inode->i_version;
1168 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1170 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1171 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1172 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1173 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1175 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1176 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1177 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1178 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1180 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1181 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1182 fattr->pre_size = i_size_read(inode);
1183 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1186 status = nfs_post_op_update_inode_locked(inode, fattr);
1187 spin_unlock(&inode->i_lock);
1192 * Many nfs protocol calls return the new file attributes after
1193 * an operation. Here we update the inode to reflect the state
1194 * of the server's inode.
1196 * This is a bit tricky because we have to make sure all dirty pages
1197 * have been sent off to the server before calling invalidate_inode_pages.
1198 * To make sure no other process adds more write requests while we try
1199 * our best to flush them, we make them sleep during the attribute refresh.
1201 * A very similar scenario holds for the dir cache.
1203 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1205 struct nfs_server *server;
1206 struct nfs_inode *nfsi = NFS_I(inode);
1207 loff_t cur_isize, new_isize;
1208 unsigned long invalid = 0;
1209 unsigned long now = jiffies;
1210 unsigned long save_cache_validity;
1212 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1213 __func__, inode->i_sb->s_id, inode->i_ino,
1214 atomic_read(&inode->i_count), fattr->valid);
1216 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1220 * Make sure the inode's type hasn't changed.
1222 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1225 server = NFS_SERVER(inode);
1226 /* Update the fsid? */
1227 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1228 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1229 !IS_AUTOMOUNT(inode))
1230 server->fsid = fattr->fsid;
1233 * Update the read time so we don't revalidate too often.
1235 nfsi->read_cache_jiffies = fattr->time_start;
1237 save_cache_validity = nfsi->cache_validity;
1238 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1239 | NFS_INO_INVALID_ATIME
1240 | NFS_INO_REVAL_FORCED
1241 | NFS_INO_REVAL_PAGECACHE);
1243 /* Do atomic weak cache consistency updates */
1244 invalid |= nfs_wcc_update_inode(inode, fattr);
1246 /* More cache consistency checks */
1247 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1248 if (inode->i_version != fattr->change_attr) {
1249 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1250 inode->i_sb->s_id, inode->i_ino);
1251 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1252 if (S_ISDIR(inode->i_mode))
1253 nfs_force_lookup_revalidate(inode);
1254 inode->i_version = fattr->change_attr;
1256 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1257 invalid |= save_cache_validity;
1259 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1260 /* NFSv2/v3: Check if the mtime agrees */
1261 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1262 dprintk("NFS: mtime change on server for file %s/%ld\n",
1263 inode->i_sb->s_id, inode->i_ino);
1264 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1265 if (S_ISDIR(inode->i_mode))
1266 nfs_force_lookup_revalidate(inode);
1267 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1269 } else if (server->caps & NFS_CAP_MTIME)
1270 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1271 | NFS_INO_INVALID_DATA
1272 | NFS_INO_REVAL_PAGECACHE
1273 | NFS_INO_REVAL_FORCED);
1275 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1276 /* If ctime has changed we should definitely clear access+acl caches */
1277 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1278 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1279 /* and probably clear data for a directory too as utimes can cause
1280 * havoc with our cache.
1282 if (S_ISDIR(inode->i_mode)) {
1283 invalid |= NFS_INO_INVALID_DATA;
1284 nfs_force_lookup_revalidate(inode);
1286 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1288 } else if (server->caps & NFS_CAP_CTIME)
1289 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1290 | NFS_INO_INVALID_ACCESS
1291 | NFS_INO_INVALID_ACL
1292 | NFS_INO_REVAL_FORCED);
1294 /* Check if our cached file size is stale */
1295 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1296 new_isize = nfs_size_to_loff_t(fattr->size);
1297 cur_isize = i_size_read(inode);
1298 if (new_isize != cur_isize) {
1299 /* Do we perhaps have any outstanding writes, or has
1300 * the file grown beyond our last write? */
1301 if ((nfsi->npages == 0 && !test_bit(NFS_INO_LAYOUTCOMMIT, &nfsi->flags)) ||
1302 new_isize > cur_isize) {
1303 i_size_write(inode, new_isize);
1304 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1306 dprintk("NFS: isize change on server for file %s/%ld "
1310 (long long)cur_isize,
1311 (long long)new_isize);
1314 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1315 | NFS_INO_REVAL_PAGECACHE
1316 | NFS_INO_REVAL_FORCED);
1319 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1320 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1321 else if (server->caps & NFS_CAP_ATIME)
1322 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1323 | NFS_INO_REVAL_FORCED);
1325 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1326 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1327 umode_t newmode = inode->i_mode & S_IFMT;
1328 newmode |= fattr->mode & S_IALLUGO;
1329 inode->i_mode = newmode;
1330 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1332 } else if (server->caps & NFS_CAP_MODE)
1333 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1334 | NFS_INO_INVALID_ACCESS
1335 | NFS_INO_INVALID_ACL
1336 | NFS_INO_REVAL_FORCED);
1338 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1339 if (inode->i_uid != fattr->uid) {
1340 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1341 inode->i_uid = fattr->uid;
1343 } else if (server->caps & NFS_CAP_OWNER)
1344 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1345 | NFS_INO_INVALID_ACCESS
1346 | NFS_INO_INVALID_ACL
1347 | NFS_INO_REVAL_FORCED);
1349 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1350 if (inode->i_gid != fattr->gid) {
1351 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1352 inode->i_gid = fattr->gid;
1354 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1355 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1356 | NFS_INO_INVALID_ACCESS
1357 | NFS_INO_INVALID_ACL
1358 | NFS_INO_REVAL_FORCED);
1360 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1361 if (inode->i_nlink != fattr->nlink) {
1362 invalid |= NFS_INO_INVALID_ATTR;
1363 if (S_ISDIR(inode->i_mode))
1364 invalid |= NFS_INO_INVALID_DATA;
1365 set_nlink(inode, fattr->nlink);
1367 } else if (server->caps & NFS_CAP_NLINK)
1368 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1369 | NFS_INO_REVAL_FORCED);
1371 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1373 * report the blocks in 512byte units
1375 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1377 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1378 inode->i_blocks = fattr->du.nfs2.blocks;
1380 /* Update attrtimeo value if we're out of the unstable period */
1381 if (invalid & NFS_INO_INVALID_ATTR) {
1382 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1383 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1384 nfsi->attrtimeo_timestamp = now;
1385 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1387 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1388 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1389 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1390 nfsi->attrtimeo_timestamp = now;
1393 invalid &= ~NFS_INO_INVALID_ATTR;
1394 /* Don't invalidate the data if we were to blame */
1395 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1396 || S_ISLNK(inode->i_mode)))
1397 invalid &= ~NFS_INO_INVALID_DATA;
1398 if (!nfs_have_delegation(inode, FMODE_READ) ||
1399 (save_cache_validity & NFS_INO_REVAL_FORCED))
1400 nfsi->cache_validity |= invalid;
1405 * Big trouble! The inode has become a different object.
1407 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1408 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1411 * No need to worry about unhashing the dentry, as the
1412 * lookup validation will know that the inode is bad.
1413 * (But we fall through to invalidate the caches.)
1415 nfs_invalidate_inode(inode);
1419 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1420 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1421 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1422 (long long)nfsi->fileid, (long long)fattr->fileid);
1427 #ifdef CONFIG_NFS_V4
1430 * Clean out any remaining NFSv4 state that might be left over due
1431 * to open() calls that passed nfs_atomic_lookup, but failed to call
1434 void nfs4_evict_inode(struct inode *inode)
1436 truncate_inode_pages(&inode->i_data, 0);
1437 end_writeback(inode);
1438 pnfs_return_layout(inode);
1439 pnfs_destroy_layout(NFS_I(inode));
1440 /* If we are holding a delegation, return it! */
1441 nfs_inode_return_delegation_noreclaim(inode);
1442 /* First call standard NFS clear_inode() code */
1443 nfs_clear_inode(inode);
1447 struct inode *nfs_alloc_inode(struct super_block *sb)
1449 struct nfs_inode *nfsi;
1450 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1454 nfsi->cache_validity = 0UL;
1455 #ifdef CONFIG_NFS_V3_ACL
1456 nfsi->acl_access = ERR_PTR(-EAGAIN);
1457 nfsi->acl_default = ERR_PTR(-EAGAIN);
1459 #ifdef CONFIG_NFS_V4
1460 nfsi->nfs4_acl = NULL;
1461 #endif /* CONFIG_NFS_V4 */
1462 return &nfsi->vfs_inode;
1465 static void nfs_i_callback(struct rcu_head *head)
1467 struct inode *inode = container_of(head, struct inode, i_rcu);
1468 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1471 void nfs_destroy_inode(struct inode *inode)
1473 call_rcu(&inode->i_rcu, nfs_i_callback);
1476 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1478 #ifdef CONFIG_NFS_V4
1479 INIT_LIST_HEAD(&nfsi->open_states);
1480 nfsi->delegation = NULL;
1481 nfsi->delegation_state = 0;
1482 init_rwsem(&nfsi->rwsem);
1483 nfsi->layout = NULL;
1484 atomic_set(&nfsi->commits_outstanding, 0);
1488 static void init_once(void *foo)
1490 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1492 inode_init_once(&nfsi->vfs_inode);
1493 INIT_LIST_HEAD(&nfsi->open_files);
1494 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1495 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1496 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1499 atomic_set(&nfsi->silly_count, 1);
1500 INIT_HLIST_HEAD(&nfsi->silly_list);
1501 init_waitqueue_head(&nfsi->waitqueue);
1502 nfs4_init_once(nfsi);
1505 static int __init nfs_init_inodecache(void)
1507 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1508 sizeof(struct nfs_inode),
1509 0, (SLAB_RECLAIM_ACCOUNT|
1512 if (nfs_inode_cachep == NULL)
1518 static void nfs_destroy_inodecache(void)
1520 kmem_cache_destroy(nfs_inode_cachep);
1523 struct workqueue_struct *nfsiod_workqueue;
1526 * start up the nfsiod workqueue
1528 static int nfsiod_start(void)
1530 struct workqueue_struct *wq;
1531 dprintk("RPC: creating workqueue nfsiod\n");
1532 wq = alloc_workqueue("nfsiod", WQ_MEM_RECLAIM, 0);
1535 nfsiod_workqueue = wq;
1540 * Destroy the nfsiod workqueue
1542 static void nfsiod_stop(void)
1544 struct workqueue_struct *wq;
1546 wq = nfsiod_workqueue;
1549 nfsiod_workqueue = NULL;
1550 destroy_workqueue(wq);
1556 static int __init init_nfs_fs(void)
1560 err = nfs_idmap_init();
1564 err = nfs_dns_resolver_init();
1568 err = nfs_fscache_register();
1572 err = nfsiod_start();
1576 err = nfs_fs_proc_init();
1580 err = nfs_init_nfspagecache();
1584 err = nfs_init_inodecache();
1588 err = nfs_init_readpagecache();
1592 err = nfs_init_writepagecache();
1596 err = nfs_init_directcache();
1600 #ifdef CONFIG_PROC_FS
1601 rpc_proc_register(&nfs_rpcstat);
1603 if ((err = register_nfs_fs()) != 0)
1607 #ifdef CONFIG_PROC_FS
1608 rpc_proc_unregister("nfs");
1610 nfs_destroy_directcache();
1612 nfs_destroy_writepagecache();
1614 nfs_destroy_readpagecache();
1616 nfs_destroy_inodecache();
1618 nfs_destroy_nfspagecache();
1624 nfs_fscache_unregister();
1626 nfs_dns_resolver_destroy();
1633 static void __exit exit_nfs_fs(void)
1635 nfs_destroy_directcache();
1636 nfs_destroy_writepagecache();
1637 nfs_destroy_readpagecache();
1638 nfs_destroy_inodecache();
1639 nfs_destroy_nfspagecache();
1640 nfs_fscache_unregister();
1641 nfs_dns_resolver_destroy();
1643 #ifdef CONFIG_PROC_FS
1644 rpc_proc_unregister("nfs");
1646 nfs_cleanup_cb_ident_idr();
1647 unregister_nfs_fs();
1652 /* Not quite true; I just maintain it */
1653 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1654 MODULE_LICENSE("GPL");
1655 module_param(enable_ino64, bool, 0644);
1657 module_init(init_nfs_fs)
1658 module_exit(exit_nfs_fs)