4 * Copyright (C) 1992 Rick Sladkey
6 * nfs inode and superblock handling functions
8 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/sched.h>
19 #include <linux/time.h>
20 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/stat.h>
24 #include <linux/errno.h>
25 #include <linux/unistd.h>
26 #include <linux/sunrpc/clnt.h>
27 #include <linux/sunrpc/stats.h>
28 #include <linux/sunrpc/metrics.h>
29 #include <linux/nfs_fs.h>
30 #include <linux/nfs_mount.h>
31 #include <linux/nfs4_mount.h>
32 #include <linux/lockd/bind.h>
33 #include <linux/seq_file.h>
34 #include <linux/mount.h>
35 #include <linux/nfs_idmap.h>
36 #include <linux/vfs.h>
37 #include <linux/inet.h>
38 #include <linux/nfs_xdr.h>
40 #include <asm/system.h>
41 #include <asm/uaccess.h>
45 #include "delegation.h"
49 #include "dns_resolve.h"
51 #define NFSDBG_FACILITY NFSDBG_VFS
53 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
55 /* Default is to see 64-bit inode numbers */
56 static int enable_ino64 = NFS_64_BIT_INODE_NUMBERS_ENABLED;
58 static void nfs_invalidate_inode(struct inode *);
59 static int nfs_update_inode(struct inode *, struct nfs_fattr *);
61 static struct kmem_cache * nfs_inode_cachep;
63 static inline unsigned long
64 nfs_fattr_to_ino_t(struct nfs_fattr *fattr)
66 return nfs_fileid_to_ino_t(fattr->fileid);
70 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
71 * @word: long word containing the bit lock
73 int nfs_wait_bit_killable(void *word)
75 if (fatal_signal_pending(current))
82 * nfs_compat_user_ino64 - returns the user-visible inode number
83 * @fileid: 64-bit fileid
85 * This function returns a 32-bit inode number if the boot parameter
86 * nfs.enable_ino64 is zero.
88 u64 nfs_compat_user_ino64(u64 fileid)
95 if (sizeof(ino) < sizeof(fileid))
96 ino ^= fileid >> (sizeof(fileid)-sizeof(ino)) * 8;
100 void nfs_clear_inode(struct inode *inode)
103 * The following should never happen...
105 BUG_ON(nfs_have_writebacks(inode));
106 BUG_ON(!list_empty(&NFS_I(inode)->open_files));
107 nfs_zap_acl_cache(inode);
108 nfs_access_zap_cache(inode);
109 nfs_fscache_release_inode_cookie(inode);
113 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
115 int nfs_sync_mapping(struct address_space *mapping)
119 if (mapping->nrpages == 0)
121 unmap_mapping_range(mapping, 0, 0, 0);
122 ret = filemap_write_and_wait(mapping);
125 ret = nfs_wb_all(mapping->host);
131 * Invalidate the local caches
133 static void nfs_zap_caches_locked(struct inode *inode)
135 struct nfs_inode *nfsi = NFS_I(inode);
136 int mode = inode->i_mode;
138 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
140 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
141 nfsi->attrtimeo_timestamp = jiffies;
143 memset(NFS_COOKIEVERF(inode), 0, sizeof(NFS_COOKIEVERF(inode)));
144 if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode))
145 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
147 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE;
150 void nfs_zap_caches(struct inode *inode)
152 spin_lock(&inode->i_lock);
153 nfs_zap_caches_locked(inode);
154 spin_unlock(&inode->i_lock);
157 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
159 if (mapping->nrpages != 0) {
160 spin_lock(&inode->i_lock);
161 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_DATA;
162 spin_unlock(&inode->i_lock);
166 void nfs_zap_acl_cache(struct inode *inode)
168 void (*clear_acl_cache)(struct inode *);
170 clear_acl_cache = NFS_PROTO(inode)->clear_acl_cache;
171 if (clear_acl_cache != NULL)
172 clear_acl_cache(inode);
173 spin_lock(&inode->i_lock);
174 NFS_I(inode)->cache_validity &= ~NFS_INO_INVALID_ACL;
175 spin_unlock(&inode->i_lock);
178 void nfs_invalidate_atime(struct inode *inode)
180 spin_lock(&inode->i_lock);
181 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATIME;
182 spin_unlock(&inode->i_lock);
186 * Invalidate, but do not unhash, the inode.
187 * NB: must be called with inode->i_lock held!
189 static void nfs_invalidate_inode(struct inode *inode)
191 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
192 nfs_zap_caches_locked(inode);
195 struct nfs_find_desc {
197 struct nfs_fattr *fattr;
201 * In NFSv3 we can have 64bit inode numbers. In order to support
202 * this, and re-exported directories (also seen in NFSv2)
203 * we are forced to allow 2 different inodes to have the same
207 nfs_find_actor(struct inode *inode, void *opaque)
209 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
210 struct nfs_fh *fh = desc->fh;
211 struct nfs_fattr *fattr = desc->fattr;
213 if (NFS_FILEID(inode) != fattr->fileid)
215 if (nfs_compare_fh(NFS_FH(inode), fh))
217 if (is_bad_inode(inode) || NFS_STALE(inode))
223 nfs_init_locked(struct inode *inode, void *opaque)
225 struct nfs_find_desc *desc = (struct nfs_find_desc *)opaque;
226 struct nfs_fattr *fattr = desc->fattr;
228 set_nfs_fileid(inode, fattr->fileid);
229 nfs_copy_fh(NFS_FH(inode), desc->fh);
233 /* Don't use READDIRPLUS on directories that we believe are too large */
234 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
237 * This is our front-end to iget that looks up inodes by file handle
238 * instead of inode number.
241 nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr)
243 struct nfs_find_desc desc = {
247 struct inode *inode = ERR_PTR(-ENOENT);
250 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) == 0)
252 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) == 0)
255 hash = nfs_fattr_to_ino_t(fattr);
257 inode = iget5_locked(sb, hash, nfs_find_actor, nfs_init_locked, &desc);
259 inode = ERR_PTR(-ENOMEM);
263 if (inode->i_state & I_NEW) {
264 struct nfs_inode *nfsi = NFS_I(inode);
265 unsigned long now = jiffies;
267 /* We set i_ino for the few things that still rely on it,
271 /* We can't support update_atime(), since the server will reset it */
272 inode->i_flags |= S_NOATIME|S_NOCMTIME;
273 inode->i_mode = fattr->mode;
274 if ((fattr->valid & NFS_ATTR_FATTR_MODE) == 0
275 && nfs_server_capable(inode, NFS_CAP_MODE))
276 nfsi->cache_validity |= NFS_INO_INVALID_ATTR
277 | NFS_INO_INVALID_ACCESS
278 | NFS_INO_INVALID_ACL;
279 /* Why so? Because we want revalidate for devices/FIFOs, and
280 * that's precisely what we have in nfs_file_inode_operations.
282 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->file_inode_ops;
283 if (S_ISREG(inode->i_mode)) {
284 inode->i_fop = &nfs_file_operations;
285 inode->i_data.a_ops = &nfs_file_aops;
286 inode->i_data.backing_dev_info = &NFS_SB(sb)->backing_dev_info;
287 } else if (S_ISDIR(inode->i_mode)) {
288 inode->i_op = NFS_SB(sb)->nfs_client->rpc_ops->dir_inode_ops;
289 inode->i_fop = &nfs_dir_operations;
290 if (nfs_server_capable(inode, NFS_CAP_READDIRPLUS)
291 && fattr->size <= NFS_LIMIT_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)) {
420 filemap_write_and_wait(inode->i_mapping);
424 * Return any delegations if we're going to change ACLs
426 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0)
427 nfs_inode_return_delegation(inode);
428 error = NFS_PROTO(inode)->setattr(dentry, &fattr, attr);
430 nfs_refresh_inode(inode, &fattr);
435 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
436 * @inode: inode of the file used
437 * @offset: file offset to start truncating
439 * This is a copy of the common vmtruncate, but with the locking
440 * corrected to take into account the fact that NFS requires
441 * inode->i_size to be updated under the inode->i_lock.
443 static int nfs_vmtruncate(struct inode * inode, loff_t offset)
448 err = inode_newsize_ok(inode, offset);
452 spin_lock(&inode->i_lock);
453 oldsize = inode->i_size;
454 i_size_write(inode, offset);
455 spin_unlock(&inode->i_lock);
457 truncate_pagecache(inode, oldsize, offset);
463 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
464 * @inode: pointer to struct inode
465 * @attr: pointer to struct iattr
467 * Note: we do this in the *proc.c in order to ensure that
468 * it works for things like exclusive creates too.
470 void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr)
472 if ((attr->ia_valid & (ATTR_MODE|ATTR_UID|ATTR_GID)) != 0) {
473 spin_lock(&inode->i_lock);
474 if ((attr->ia_valid & ATTR_MODE) != 0) {
475 int mode = attr->ia_mode & S_IALLUGO;
476 mode |= inode->i_mode & ~S_IALLUGO;
477 inode->i_mode = mode;
479 if ((attr->ia_valid & ATTR_UID) != 0)
480 inode->i_uid = attr->ia_uid;
481 if ((attr->ia_valid & ATTR_GID) != 0)
482 inode->i_gid = attr->ia_gid;
483 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
484 spin_unlock(&inode->i_lock);
486 if ((attr->ia_valid & ATTR_SIZE) != 0) {
487 nfs_inc_stats(inode, NFSIOS_SETATTRTRUNC);
488 nfs_vmtruncate(inode, attr->ia_size);
492 int nfs_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat)
494 struct inode *inode = dentry->d_inode;
495 int need_atime = NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATIME;
499 * Flush out writes to the server in order to update c/mtime.
501 * Hold the i_mutex to suspend application writes temporarily;
502 * this prevents long-running writing applications from blocking
505 if (S_ISREG(inode->i_mode)) {
506 mutex_lock(&inode->i_mutex);
507 nfs_wb_nocommit(inode);
508 mutex_unlock(&inode->i_mutex);
512 * We may force a getattr if the user cares about atime.
514 * Note that we only have to check the vfsmount flags here:
515 * - NFS always sets S_NOATIME by so checking it would give a
517 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
518 * no point in checking those.
520 if ((mnt->mnt_flags & MNT_NOATIME) ||
521 ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode)))
525 err = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
527 err = nfs_revalidate_inode(NFS_SERVER(inode), inode);
529 generic_fillattr(inode, stat);
530 stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
536 * nfs_close_context - Common close_context() routine NFSv2/v3
537 * @ctx: pointer to context
538 * @is_sync: is this a synchronous close
540 * always ensure that the attributes are up to date if we're mounted
541 * with close-to-open semantics
543 void nfs_close_context(struct nfs_open_context *ctx, int is_sync)
546 struct nfs_server *server;
548 if (!(ctx->mode & FMODE_WRITE))
552 inode = ctx->path.dentry->d_inode;
553 if (!list_empty(&NFS_I(inode)->open_files))
555 server = NFS_SERVER(inode);
556 if (server->flags & NFS_MOUNT_NOCTO)
558 nfs_revalidate_inode(server, inode);
561 static struct nfs_open_context *alloc_nfs_open_context(struct path *path, struct rpc_cred *cred)
563 struct nfs_open_context *ctx;
565 ctx = kmalloc(sizeof(*ctx), GFP_KERNEL);
568 path_get(&ctx->path);
569 ctx->cred = get_rpccred(cred);
571 ctx->lockowner = current->files;
575 atomic_set(&ctx->count, 1);
580 struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx)
583 atomic_inc(&ctx->count);
587 static void __put_nfs_open_context(struct nfs_open_context *ctx, int is_sync)
589 struct inode *inode = ctx->path.dentry->d_inode;
591 if (!atomic_dec_and_lock(&ctx->count, &inode->i_lock))
593 list_del(&ctx->list);
594 spin_unlock(&inode->i_lock);
595 NFS_PROTO(inode)->close_context(ctx, is_sync);
596 if (ctx->cred != NULL)
597 put_rpccred(ctx->cred);
598 path_put(&ctx->path);
602 void put_nfs_open_context(struct nfs_open_context *ctx)
604 __put_nfs_open_context(ctx, 0);
607 static void put_nfs_open_context_sync(struct nfs_open_context *ctx)
609 __put_nfs_open_context(ctx, 1);
613 * Ensure that mmap has a recent RPC credential for use when writing out
616 static void nfs_file_set_open_context(struct file *filp, struct nfs_open_context *ctx)
618 struct inode *inode = filp->f_path.dentry->d_inode;
619 struct nfs_inode *nfsi = NFS_I(inode);
621 filp->private_data = get_nfs_open_context(ctx);
622 spin_lock(&inode->i_lock);
623 list_add(&ctx->list, &nfsi->open_files);
624 spin_unlock(&inode->i_lock);
628 * Given an inode, search for an open context with the desired characteristics
630 struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode)
632 struct nfs_inode *nfsi = NFS_I(inode);
633 struct nfs_open_context *pos, *ctx = NULL;
635 spin_lock(&inode->i_lock);
636 list_for_each_entry(pos, &nfsi->open_files, list) {
637 if (cred != NULL && pos->cred != cred)
639 if ((pos->mode & mode) == mode) {
640 ctx = get_nfs_open_context(pos);
644 spin_unlock(&inode->i_lock);
648 static void nfs_file_clear_open_context(struct file *filp)
650 struct inode *inode = filp->f_path.dentry->d_inode;
651 struct nfs_open_context *ctx = nfs_file_open_context(filp);
654 filp->private_data = NULL;
655 spin_lock(&inode->i_lock);
656 list_move_tail(&ctx->list, &NFS_I(inode)->open_files);
657 spin_unlock(&inode->i_lock);
658 put_nfs_open_context_sync(ctx);
663 * These allocate and release file read/write context information.
665 int nfs_open(struct inode *inode, struct file *filp)
667 struct nfs_open_context *ctx;
668 struct rpc_cred *cred;
670 cred = rpc_lookup_cred();
672 return PTR_ERR(cred);
673 ctx = alloc_nfs_open_context(&filp->f_path, cred);
677 ctx->mode = filp->f_mode;
678 nfs_file_set_open_context(filp, ctx);
679 put_nfs_open_context(ctx);
680 nfs_fscache_set_inode_cookie(inode, filp);
684 int nfs_release(struct inode *inode, struct file *filp)
686 nfs_file_clear_open_context(filp);
691 * This function is called whenever some part of NFS notices that
692 * the cached attributes have to be refreshed.
695 __nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
697 int status = -ESTALE;
698 struct nfs_fattr fattr;
699 struct nfs_inode *nfsi = NFS_I(inode);
701 dfprintk(PAGECACHE, "NFS: revalidating (%s/%Ld)\n",
702 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
704 if (is_bad_inode(inode))
706 if (NFS_STALE(inode))
709 nfs_inc_stats(inode, NFSIOS_INODEREVALIDATE);
710 status = NFS_PROTO(inode)->getattr(server, NFS_FH(inode), &fattr);
712 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
714 (long long)NFS_FILEID(inode), status);
715 if (status == -ESTALE) {
716 nfs_zap_caches(inode);
717 if (!S_ISDIR(inode->i_mode))
718 set_bit(NFS_INO_STALE, &NFS_I(inode)->flags);
723 status = nfs_refresh_inode(inode, &fattr);
725 dfprintk(PAGECACHE, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
727 (long long)NFS_FILEID(inode), status);
731 if (nfsi->cache_validity & NFS_INO_INVALID_ACL)
732 nfs_zap_acl_cache(inode);
734 dfprintk(PAGECACHE, "NFS: (%s/%Ld) revalidation complete\n",
736 (long long)NFS_FILEID(inode));
742 int nfs_attribute_timeout(struct inode *inode)
744 struct nfs_inode *nfsi = NFS_I(inode);
746 if (nfs_have_delegation(inode, FMODE_READ))
748 return !time_in_range_open(jiffies, nfsi->read_cache_jiffies, nfsi->read_cache_jiffies + nfsi->attrtimeo);
752 * nfs_revalidate_inode - Revalidate the inode attributes
753 * @server - pointer to nfs_server struct
754 * @inode - pointer to inode struct
756 * Updates inode attribute information by retrieving the data from the server.
758 int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode)
760 if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR)
761 && !nfs_attribute_timeout(inode))
762 return NFS_STALE(inode) ? -ESTALE : 0;
763 return __nfs_revalidate_inode(server, inode);
766 static int nfs_invalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
768 struct nfs_inode *nfsi = NFS_I(inode);
770 if (mapping->nrpages != 0) {
771 int ret = invalidate_inode_pages2(mapping);
775 spin_lock(&inode->i_lock);
776 nfsi->cache_validity &= ~NFS_INO_INVALID_DATA;
777 if (S_ISDIR(inode->i_mode))
778 memset(nfsi->cookieverf, 0, sizeof(nfsi->cookieverf));
779 spin_unlock(&inode->i_lock);
780 nfs_inc_stats(inode, NFSIOS_DATAINVALIDATE);
781 nfs_fscache_reset_inode_cookie(inode);
782 dfprintk(PAGECACHE, "NFS: (%s/%Ld) data cache invalidated\n",
783 inode->i_sb->s_id, (long long)NFS_FILEID(inode));
787 static int nfs_invalidate_mapping(struct inode *inode, struct address_space *mapping)
791 mutex_lock(&inode->i_mutex);
792 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_DATA) {
793 ret = nfs_sync_mapping(mapping);
795 ret = nfs_invalidate_mapping_nolock(inode, mapping);
797 mutex_unlock(&inode->i_mutex);
802 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
803 * @inode - pointer to host inode
804 * @mapping - pointer to mapping
806 int nfs_revalidate_mapping_nolock(struct inode *inode, struct address_space *mapping)
808 struct nfs_inode *nfsi = NFS_I(inode);
811 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
812 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
813 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
817 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
818 ret = nfs_invalidate_mapping_nolock(inode, mapping);
824 * nfs_revalidate_mapping - Revalidate the pagecache
825 * @inode - pointer to host inode
826 * @mapping - pointer to mapping
828 * This version of the function will take the inode->i_mutex and attempt to
829 * flush out all dirty data if it needs to invalidate the page cache.
831 int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping)
833 struct nfs_inode *nfsi = NFS_I(inode);
836 if ((nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
837 || nfs_attribute_timeout(inode) || NFS_STALE(inode)) {
838 ret = __nfs_revalidate_inode(NFS_SERVER(inode), inode);
842 if (nfsi->cache_validity & NFS_INO_INVALID_DATA)
843 ret = nfs_invalidate_mapping(inode, mapping);
848 static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
850 struct nfs_inode *nfsi = NFS_I(inode);
852 if ((fattr->valid & NFS_ATTR_FATTR_PRECHANGE)
853 && (fattr->valid & NFS_ATTR_FATTR_CHANGE)
854 && nfsi->change_attr == fattr->pre_change_attr) {
855 nfsi->change_attr = fattr->change_attr;
856 if (S_ISDIR(inode->i_mode))
857 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
859 /* If we have atomic WCC data, we may update some attributes */
860 if ((fattr->valid & NFS_ATTR_FATTR_PRECTIME)
861 && (fattr->valid & NFS_ATTR_FATTR_CTIME)
862 && timespec_equal(&inode->i_ctime, &fattr->pre_ctime))
863 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
865 if ((fattr->valid & NFS_ATTR_FATTR_PREMTIME)
866 && (fattr->valid & NFS_ATTR_FATTR_MTIME)
867 && timespec_equal(&inode->i_mtime, &fattr->pre_mtime)) {
868 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
869 if (S_ISDIR(inode->i_mode))
870 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
872 if ((fattr->valid & NFS_ATTR_FATTR_PRESIZE)
873 && (fattr->valid & NFS_ATTR_FATTR_SIZE)
874 && i_size_read(inode) == nfs_size_to_loff_t(fattr->pre_size)
875 && nfsi->npages == 0)
876 i_size_write(inode, nfs_size_to_loff_t(fattr->size));
880 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
881 * @inode - pointer to inode
882 * @fattr - updated attributes
884 * Verifies the attribute cache. If we have just changed the attributes,
885 * so that fattr carries weak cache consistency data, then it may
886 * also update the ctime/mtime/change_attribute.
888 static int nfs_check_inode_attributes(struct inode *inode, struct nfs_fattr *fattr)
890 struct nfs_inode *nfsi = NFS_I(inode);
891 loff_t cur_size, new_isize;
892 unsigned long invalid = 0;
895 /* Has the inode gone and changed behind our back? */
896 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
898 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
901 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
902 nfsi->change_attr != fattr->change_attr)
903 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
905 /* Verify a few of the more important attributes */
906 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) && !timespec_equal(&inode->i_mtime, &fattr->mtime))
907 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
909 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
910 cur_size = i_size_read(inode);
911 new_isize = nfs_size_to_loff_t(fattr->size);
912 if (cur_size != new_isize && nfsi->npages == 0)
913 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
916 /* Have any file permissions changed? */
917 if ((fattr->valid & NFS_ATTR_FATTR_MODE) && (inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO))
918 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
919 if ((fattr->valid & NFS_ATTR_FATTR_OWNER) && inode->i_uid != fattr->uid)
920 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
921 if ((fattr->valid & NFS_ATTR_FATTR_GROUP) && inode->i_gid != fattr->gid)
922 invalid |= NFS_INO_INVALID_ATTR | NFS_INO_INVALID_ACCESS | NFS_INO_INVALID_ACL;
924 /* Has the link count changed? */
925 if ((fattr->valid & NFS_ATTR_FATTR_NLINK) && inode->i_nlink != fattr->nlink)
926 invalid |= NFS_INO_INVALID_ATTR;
928 if ((fattr->valid & NFS_ATTR_FATTR_ATIME) && !timespec_equal(&inode->i_atime, &fattr->atime))
929 invalid |= NFS_INO_INVALID_ATIME;
932 nfsi->cache_validity |= invalid;
934 nfsi->read_cache_jiffies = fattr->time_start;
938 static int nfs_ctime_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
940 if (!(fattr->valid & NFS_ATTR_FATTR_CTIME))
942 return timespec_compare(&fattr->ctime, &inode->i_ctime) > 0;
945 static int nfs_size_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
947 if (!(fattr->valid & NFS_ATTR_FATTR_SIZE))
949 return nfs_size_to_loff_t(fattr->size) > i_size_read(inode);
952 static atomic_long_t nfs_attr_generation_counter;
954 static unsigned long nfs_read_attr_generation_counter(void)
956 return atomic_long_read(&nfs_attr_generation_counter);
959 unsigned long nfs_inc_attr_generation_counter(void)
961 return atomic_long_inc_return(&nfs_attr_generation_counter);
964 void nfs_fattr_init(struct nfs_fattr *fattr)
967 fattr->time_start = jiffies;
968 fattr->gencount = nfs_inc_attr_generation_counter();
972 * nfs_inode_attrs_need_update - check if the inode attributes need updating
973 * @inode - pointer to inode
974 * @fattr - attributes
976 * Attempt to divine whether or not an RPC call reply carrying stale
977 * attributes got scheduled after another call carrying updated ones.
979 * To do so, the function first assumes that a more recent ctime means
980 * that the attributes in fattr are newer, however it also attempt to
981 * catch the case where ctime either didn't change, or went backwards
982 * (if someone reset the clock on the server) by looking at whether
983 * or not this RPC call was started after the inode was last updated.
984 * Note also the check for wraparound of 'attr_gencount'
986 * The function returns 'true' if it thinks the attributes in 'fattr' are
987 * more recent than the ones cached in the inode.
990 static int nfs_inode_attrs_need_update(const struct inode *inode, const struct nfs_fattr *fattr)
992 const struct nfs_inode *nfsi = NFS_I(inode);
994 return ((long)fattr->gencount - (long)nfsi->attr_gencount) > 0 ||
995 nfs_ctime_need_update(inode, fattr) ||
996 nfs_size_need_update(inode, fattr) ||
997 ((long)nfsi->attr_gencount - (long)nfs_read_attr_generation_counter() > 0);
1000 static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1002 if (nfs_inode_attrs_need_update(inode, fattr))
1003 return nfs_update_inode(inode, fattr);
1004 return nfs_check_inode_attributes(inode, fattr);
1008 * nfs_refresh_inode - try to update the inode attribute cache
1009 * @inode - pointer to inode
1010 * @fattr - updated attributes
1012 * Check that an RPC call that returned attributes has not overlapped with
1013 * other recent updates of the inode metadata, then decide whether it is
1014 * safe to do a full update of the inode attributes, or whether just to
1015 * call nfs_check_inode_attributes.
1017 int nfs_refresh_inode(struct inode *inode, struct nfs_fattr *fattr)
1021 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1023 spin_lock(&inode->i_lock);
1024 status = nfs_refresh_inode_locked(inode, fattr);
1025 spin_unlock(&inode->i_lock);
1030 static int nfs_post_op_update_inode_locked(struct inode *inode, struct nfs_fattr *fattr)
1032 struct nfs_inode *nfsi = NFS_I(inode);
1034 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_REVAL_PAGECACHE;
1035 if (S_ISDIR(inode->i_mode))
1036 nfsi->cache_validity |= NFS_INO_INVALID_DATA;
1037 if ((fattr->valid & NFS_ATTR_FATTR) == 0)
1039 return nfs_refresh_inode_locked(inode, fattr);
1043 * nfs_post_op_update_inode - try to update the inode attribute cache
1044 * @inode - pointer to inode
1045 * @fattr - updated attributes
1047 * After an operation that has changed the inode metadata, mark the
1048 * attribute cache as being invalid, then try to update it.
1050 * NB: if the server didn't return any post op attributes, this
1051 * function will force the retrieval of attributes before the next
1052 * NFS request. Thus it should be used only for operations that
1053 * are expected to change one or more attributes, to avoid
1054 * unnecessary NFS requests and trips through nfs_update_inode().
1056 int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1060 spin_lock(&inode->i_lock);
1061 status = nfs_post_op_update_inode_locked(inode, fattr);
1062 spin_unlock(&inode->i_lock);
1067 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1068 * @inode - pointer to inode
1069 * @fattr - updated attributes
1071 * After an operation that has changed the inode metadata, mark the
1072 * attribute cache as being invalid, then try to update it. Fake up
1073 * weak cache consistency data, if none exist.
1075 * This function is mainly designed to be used by the ->write_done() functions.
1077 int nfs_post_op_update_inode_force_wcc(struct inode *inode, struct nfs_fattr *fattr)
1081 spin_lock(&inode->i_lock);
1082 /* Don't do a WCC update if these attributes are already stale */
1083 if ((fattr->valid & NFS_ATTR_FATTR) == 0 ||
1084 !nfs_inode_attrs_need_update(inode, fattr)) {
1085 fattr->valid &= ~(NFS_ATTR_FATTR_PRECHANGE
1086 | NFS_ATTR_FATTR_PRESIZE
1087 | NFS_ATTR_FATTR_PREMTIME
1088 | NFS_ATTR_FATTR_PRECTIME);
1091 if ((fattr->valid & NFS_ATTR_FATTR_CHANGE) != 0 &&
1092 (fattr->valid & NFS_ATTR_FATTR_PRECHANGE) == 0) {
1093 fattr->pre_change_attr = NFS_I(inode)->change_attr;
1094 fattr->valid |= NFS_ATTR_FATTR_PRECHANGE;
1096 if ((fattr->valid & NFS_ATTR_FATTR_CTIME) != 0 &&
1097 (fattr->valid & NFS_ATTR_FATTR_PRECTIME) == 0) {
1098 memcpy(&fattr->pre_ctime, &inode->i_ctime, sizeof(fattr->pre_ctime));
1099 fattr->valid |= NFS_ATTR_FATTR_PRECTIME;
1101 if ((fattr->valid & NFS_ATTR_FATTR_MTIME) != 0 &&
1102 (fattr->valid & NFS_ATTR_FATTR_PREMTIME) == 0) {
1103 memcpy(&fattr->pre_mtime, &inode->i_mtime, sizeof(fattr->pre_mtime));
1104 fattr->valid |= NFS_ATTR_FATTR_PREMTIME;
1106 if ((fattr->valid & NFS_ATTR_FATTR_SIZE) != 0 &&
1107 (fattr->valid & NFS_ATTR_FATTR_PRESIZE) == 0) {
1108 fattr->pre_size = i_size_read(inode);
1109 fattr->valid |= NFS_ATTR_FATTR_PRESIZE;
1112 status = nfs_post_op_update_inode_locked(inode, fattr);
1113 spin_unlock(&inode->i_lock);
1118 * Many nfs protocol calls return the new file attributes after
1119 * an operation. Here we update the inode to reflect the state
1120 * of the server's inode.
1122 * This is a bit tricky because we have to make sure all dirty pages
1123 * have been sent off to the server before calling invalidate_inode_pages.
1124 * To make sure no other process adds more write requests while we try
1125 * our best to flush them, we make them sleep during the attribute refresh.
1127 * A very similar scenario holds for the dir cache.
1129 static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
1131 struct nfs_server *server;
1132 struct nfs_inode *nfsi = NFS_I(inode);
1133 loff_t cur_isize, new_isize;
1134 unsigned long invalid = 0;
1135 unsigned long now = jiffies;
1136 unsigned long save_cache_validity;
1138 dfprintk(VFS, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1139 __func__, inode->i_sb->s_id, inode->i_ino,
1140 atomic_read(&inode->i_count), fattr->valid);
1142 if ((fattr->valid & NFS_ATTR_FATTR_FILEID) && nfsi->fileid != fattr->fileid)
1146 * Make sure the inode's type hasn't changed.
1148 if ((fattr->valid & NFS_ATTR_FATTR_TYPE) && (inode->i_mode & S_IFMT) != (fattr->mode & S_IFMT))
1151 server = NFS_SERVER(inode);
1152 /* Update the fsid? */
1153 if (S_ISDIR(inode->i_mode) && (fattr->valid & NFS_ATTR_FATTR_FSID) &&
1154 !nfs_fsid_equal(&server->fsid, &fattr->fsid) &&
1155 !test_bit(NFS_INO_MOUNTPOINT, &nfsi->flags))
1156 server->fsid = fattr->fsid;
1159 * Update the read time so we don't revalidate too often.
1161 nfsi->read_cache_jiffies = fattr->time_start;
1163 save_cache_validity = nfsi->cache_validity;
1164 nfsi->cache_validity &= ~(NFS_INO_INVALID_ATTR
1165 | NFS_INO_INVALID_ATIME
1166 | NFS_INO_REVAL_FORCED
1167 | NFS_INO_REVAL_PAGECACHE);
1169 /* Do atomic weak cache consistency updates */
1170 nfs_wcc_update_inode(inode, fattr);
1172 /* More cache consistency checks */
1173 if (fattr->valid & NFS_ATTR_FATTR_CHANGE) {
1174 if (nfsi->change_attr != fattr->change_attr) {
1175 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1176 inode->i_sb->s_id, inode->i_ino);
1177 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1178 if (S_ISDIR(inode->i_mode))
1179 nfs_force_lookup_revalidate(inode);
1180 nfsi->change_attr = fattr->change_attr;
1182 } else if (server->caps & NFS_CAP_CHANGE_ATTR)
1183 invalid |= save_cache_validity;
1185 if (fattr->valid & NFS_ATTR_FATTR_MTIME) {
1186 /* NFSv2/v3: Check if the mtime agrees */
1187 if (!timespec_equal(&inode->i_mtime, &fattr->mtime)) {
1188 dprintk("NFS: mtime change on server for file %s/%ld\n",
1189 inode->i_sb->s_id, inode->i_ino);
1190 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1191 if (S_ISDIR(inode->i_mode))
1192 nfs_force_lookup_revalidate(inode);
1193 memcpy(&inode->i_mtime, &fattr->mtime, sizeof(inode->i_mtime));
1195 } else if (server->caps & NFS_CAP_MTIME)
1196 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1197 | NFS_INO_INVALID_DATA
1198 | NFS_INO_REVAL_PAGECACHE
1199 | NFS_INO_REVAL_FORCED);
1201 if (fattr->valid & NFS_ATTR_FATTR_CTIME) {
1202 /* If ctime has changed we should definitely clear access+acl caches */
1203 if (!timespec_equal(&inode->i_ctime, &fattr->ctime)) {
1204 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1205 /* and probably clear data for a directory too as utimes can cause
1206 * havoc with our cache.
1208 if (S_ISDIR(inode->i_mode)) {
1209 invalid |= NFS_INO_INVALID_DATA;
1210 nfs_force_lookup_revalidate(inode);
1212 memcpy(&inode->i_ctime, &fattr->ctime, sizeof(inode->i_ctime));
1214 } else if (server->caps & NFS_CAP_CTIME)
1215 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1216 | NFS_INO_INVALID_ACCESS
1217 | NFS_INO_INVALID_ACL
1218 | NFS_INO_REVAL_FORCED);
1220 /* Check if our cached file size is stale */
1221 if (fattr->valid & NFS_ATTR_FATTR_SIZE) {
1222 new_isize = nfs_size_to_loff_t(fattr->size);
1223 cur_isize = i_size_read(inode);
1224 if (new_isize != cur_isize) {
1225 /* Do we perhaps have any outstanding writes, or has
1226 * the file grown beyond our last write? */
1227 if (nfsi->npages == 0 || new_isize > cur_isize) {
1228 i_size_write(inode, new_isize);
1229 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
1231 dprintk("NFS: isize change on server for file %s/%ld\n",
1232 inode->i_sb->s_id, inode->i_ino);
1235 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1236 | NFS_INO_REVAL_PAGECACHE
1237 | NFS_INO_REVAL_FORCED);
1240 if (fattr->valid & NFS_ATTR_FATTR_ATIME)
1241 memcpy(&inode->i_atime, &fattr->atime, sizeof(inode->i_atime));
1242 else if (server->caps & NFS_CAP_ATIME)
1243 invalid |= save_cache_validity & (NFS_INO_INVALID_ATIME
1244 | NFS_INO_REVAL_FORCED);
1246 if (fattr->valid & NFS_ATTR_FATTR_MODE) {
1247 if ((inode->i_mode & S_IALLUGO) != (fattr->mode & S_IALLUGO)) {
1248 umode_t newmode = inode->i_mode & S_IFMT;
1249 newmode |= fattr->mode & S_IALLUGO;
1250 inode->i_mode = newmode;
1251 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1253 } else if (server->caps & NFS_CAP_MODE)
1254 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1255 | NFS_INO_INVALID_ACCESS
1256 | NFS_INO_INVALID_ACL
1257 | NFS_INO_REVAL_FORCED);
1259 if (fattr->valid & NFS_ATTR_FATTR_OWNER) {
1260 if (inode->i_uid != fattr->uid) {
1261 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1262 inode->i_uid = fattr->uid;
1264 } else if (server->caps & NFS_CAP_OWNER)
1265 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1266 | NFS_INO_INVALID_ACCESS
1267 | NFS_INO_INVALID_ACL
1268 | NFS_INO_REVAL_FORCED);
1270 if (fattr->valid & NFS_ATTR_FATTR_GROUP) {
1271 if (inode->i_gid != fattr->gid) {
1272 invalid |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL;
1273 inode->i_gid = fattr->gid;
1275 } else if (server->caps & NFS_CAP_OWNER_GROUP)
1276 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1277 | NFS_INO_INVALID_ACCESS
1278 | NFS_INO_INVALID_ACL
1279 | NFS_INO_REVAL_FORCED);
1281 if (fattr->valid & NFS_ATTR_FATTR_NLINK) {
1282 if (inode->i_nlink != fattr->nlink) {
1283 invalid |= NFS_INO_INVALID_ATTR;
1284 if (S_ISDIR(inode->i_mode))
1285 invalid |= NFS_INO_INVALID_DATA;
1286 inode->i_nlink = fattr->nlink;
1288 } else if (server->caps & NFS_CAP_NLINK)
1289 invalid |= save_cache_validity & (NFS_INO_INVALID_ATTR
1290 | NFS_INO_REVAL_FORCED);
1292 if (fattr->valid & NFS_ATTR_FATTR_SPACE_USED) {
1294 * report the blocks in 512byte units
1296 inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used);
1298 if (fattr->valid & NFS_ATTR_FATTR_BLOCKS_USED)
1299 inode->i_blocks = fattr->du.nfs2.blocks;
1301 /* Update attrtimeo value if we're out of the unstable period */
1302 if (invalid & NFS_INO_INVALID_ATTR) {
1303 nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE);
1304 nfsi->attrtimeo = NFS_MINATTRTIMEO(inode);
1305 nfsi->attrtimeo_timestamp = now;
1306 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
1308 if (!time_in_range_open(now, nfsi->attrtimeo_timestamp, nfsi->attrtimeo_timestamp + nfsi->attrtimeo)) {
1309 if ((nfsi->attrtimeo <<= 1) > NFS_MAXATTRTIMEO(inode))
1310 nfsi->attrtimeo = NFS_MAXATTRTIMEO(inode);
1311 nfsi->attrtimeo_timestamp = now;
1314 invalid &= ~NFS_INO_INVALID_ATTR;
1315 /* Don't invalidate the data if we were to blame */
1316 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)
1317 || S_ISLNK(inode->i_mode)))
1318 invalid &= ~NFS_INO_INVALID_DATA;
1319 if (!nfs_have_delegation(inode, FMODE_READ) ||
1320 (save_cache_validity & NFS_INO_REVAL_FORCED))
1321 nfsi->cache_validity |= invalid;
1326 * Big trouble! The inode has become a different object.
1328 printk(KERN_DEBUG "%s: inode %ld mode changed, %07o to %07o\n",
1329 __func__, inode->i_ino, inode->i_mode, fattr->mode);
1332 * No need to worry about unhashing the dentry, as the
1333 * lookup validation will know that the inode is bad.
1334 * (But we fall through to invalidate the caches.)
1336 nfs_invalidate_inode(inode);
1340 printk(KERN_ERR "NFS: server %s error: fileid changed\n"
1341 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1342 NFS_SERVER(inode)->nfs_client->cl_hostname, inode->i_sb->s_id,
1343 (long long)nfsi->fileid, (long long)fattr->fileid);
1348 #ifdef CONFIG_NFS_V4
1351 * Clean out any remaining NFSv4 state that might be left over due
1352 * to open() calls that passed nfs_atomic_lookup, but failed to call
1355 void nfs4_clear_inode(struct inode *inode)
1357 /* If we are holding a delegation, return it! */
1358 nfs_inode_return_delegation_noreclaim(inode);
1359 /* First call standard NFS clear_inode() code */
1360 nfs_clear_inode(inode);
1364 struct inode *nfs_alloc_inode(struct super_block *sb)
1366 struct nfs_inode *nfsi;
1367 nfsi = (struct nfs_inode *)kmem_cache_alloc(nfs_inode_cachep, GFP_KERNEL);
1371 nfsi->cache_validity = 0UL;
1372 #ifdef CONFIG_NFS_V3_ACL
1373 nfsi->acl_access = ERR_PTR(-EAGAIN);
1374 nfsi->acl_default = ERR_PTR(-EAGAIN);
1376 #ifdef CONFIG_NFS_V4
1377 nfsi->nfs4_acl = NULL;
1378 #endif /* CONFIG_NFS_V4 */
1379 return &nfsi->vfs_inode;
1382 void nfs_destroy_inode(struct inode *inode)
1384 kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
1387 static inline void nfs4_init_once(struct nfs_inode *nfsi)
1389 #ifdef CONFIG_NFS_V4
1390 INIT_LIST_HEAD(&nfsi->open_states);
1391 nfsi->delegation = NULL;
1392 nfsi->delegation_state = 0;
1393 init_rwsem(&nfsi->rwsem);
1397 static void init_once(void *foo)
1399 struct nfs_inode *nfsi = (struct nfs_inode *) foo;
1401 inode_init_once(&nfsi->vfs_inode);
1402 INIT_LIST_HEAD(&nfsi->open_files);
1403 INIT_LIST_HEAD(&nfsi->access_cache_entry_lru);
1404 INIT_LIST_HEAD(&nfsi->access_cache_inode_lru);
1405 INIT_RADIX_TREE(&nfsi->nfs_page_tree, GFP_ATOMIC);
1407 atomic_set(&nfsi->silly_count, 1);
1408 INIT_HLIST_HEAD(&nfsi->silly_list);
1409 init_waitqueue_head(&nfsi->waitqueue);
1410 nfs4_init_once(nfsi);
1413 static int __init nfs_init_inodecache(void)
1415 nfs_inode_cachep = kmem_cache_create("nfs_inode_cache",
1416 sizeof(struct nfs_inode),
1417 0, (SLAB_RECLAIM_ACCOUNT|
1420 if (nfs_inode_cachep == NULL)
1426 static void nfs_destroy_inodecache(void)
1428 kmem_cache_destroy(nfs_inode_cachep);
1431 struct workqueue_struct *nfsiod_workqueue;
1434 * start up the nfsiod workqueue
1436 static int nfsiod_start(void)
1438 struct workqueue_struct *wq;
1439 dprintk("RPC: creating workqueue nfsiod\n");
1440 wq = create_singlethread_workqueue("nfsiod");
1443 nfsiod_workqueue = wq;
1448 * Destroy the nfsiod workqueue
1450 static void nfsiod_stop(void)
1452 struct workqueue_struct *wq;
1454 wq = nfsiod_workqueue;
1457 nfsiod_workqueue = NULL;
1458 destroy_workqueue(wq);
1464 static int __init init_nfs_fs(void)
1468 err = nfs_dns_resolver_init();
1472 err = nfs_fscache_register();
1476 err = nfsiod_start();
1480 err = nfs_fs_proc_init();
1484 err = nfs_init_nfspagecache();
1488 err = nfs_init_inodecache();
1492 err = nfs_init_readpagecache();
1496 err = nfs_init_writepagecache();
1500 err = nfs_init_directcache();
1504 #ifdef CONFIG_PROC_FS
1505 rpc_proc_register(&nfs_rpcstat);
1507 if ((err = register_nfs_fs()) != 0)
1511 #ifdef CONFIG_PROC_FS
1512 rpc_proc_unregister("nfs");
1514 nfs_destroy_directcache();
1516 nfs_destroy_writepagecache();
1518 nfs_destroy_readpagecache();
1520 nfs_destroy_inodecache();
1522 nfs_destroy_nfspagecache();
1528 nfs_fscache_unregister();
1530 nfs_dns_resolver_destroy();
1535 static void __exit exit_nfs_fs(void)
1537 nfs_destroy_directcache();
1538 nfs_destroy_writepagecache();
1539 nfs_destroy_readpagecache();
1540 nfs_destroy_inodecache();
1541 nfs_destroy_nfspagecache();
1542 nfs_fscache_unregister();
1543 nfs_dns_resolver_destroy();
1544 #ifdef CONFIG_PROC_FS
1545 rpc_proc_unregister("nfs");
1547 unregister_nfs_fs();
1552 /* Not quite true; I just maintain it */
1553 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1554 MODULE_LICENSE("GPL");
1555 module_param(enable_ino64, bool, 0644);
1557 module_init(init_nfs_fs)
1558 module_exit(exit_nfs_fs)