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/smp_lock.h>
34 #include <linux/seq_file.h>
35 #include <linux/mount.h>
36 #include <linux/nfs_idmap.h>
37 #include <linux/vfs.h>
38 #include <linux/inet.h>
39 #include <linux/nfs_xdr.h>
41 #include <asm/system.h>
42 #include <asm/uaccess.h>
46 #include "delegation.h"
50 #define NFSDBG_FACILITY NFSDBG_VFS
52 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
54 /* Default is to see 64-bit inode numbers */
55 static int enable_ino64
= NFS_64_BIT_INODE_NUMBERS_ENABLED
;
57 static void nfs_invalidate_inode(struct inode
*);
58 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
60 static struct kmem_cache
* nfs_inode_cachep
;
62 static inline unsigned long
63 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
65 return nfs_fileid_to_ino_t(fattr
->fileid
);
69 * nfs_compat_user_ino64 - returns the user-visible inode number
70 * @fileid: 64-bit fileid
72 * This function returns a 32-bit inode number if the boot parameter
73 * nfs.enable_ino64 is zero.
75 u64
nfs_compat_user_ino64(u64 fileid
)
82 if (sizeof(ino
) < sizeof(fileid
))
83 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
87 int nfs_write_inode(struct inode
*inode
, int sync
)
92 ret
= filemap_fdatawait(inode
->i_mapping
);
94 ret
= nfs_commit_inode(inode
, FLUSH_SYNC
);
96 ret
= nfs_commit_inode(inode
, 0);
99 __mark_inode_dirty(inode
, I_DIRTY_DATASYNC
);
103 void nfs_clear_inode(struct inode
*inode
)
106 * The following should never happen...
108 BUG_ON(nfs_have_writebacks(inode
));
109 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
110 nfs_zap_acl_cache(inode
);
111 nfs_access_zap_cache(inode
);
115 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
117 int nfs_sync_mapping(struct address_space
*mapping
)
121 if (mapping
->nrpages
== 0)
123 unmap_mapping_range(mapping
, 0, 0, 0);
124 ret
= filemap_write_and_wait(mapping
);
127 ret
= nfs_wb_all(mapping
->host
);
133 * Invalidate the local caches
135 static void nfs_zap_caches_locked(struct inode
*inode
)
137 struct nfs_inode
*nfsi
= NFS_I(inode
);
138 int mode
= inode
->i_mode
;
140 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
142 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
143 nfsi
->attrtimeo_timestamp
= jiffies
;
145 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
146 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
147 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
149 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
152 void nfs_zap_caches(struct inode
*inode
)
154 spin_lock(&inode
->i_lock
);
155 nfs_zap_caches_locked(inode
);
156 spin_unlock(&inode
->i_lock
);
159 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
161 if (mapping
->nrpages
!= 0) {
162 spin_lock(&inode
->i_lock
);
163 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_DATA
;
164 spin_unlock(&inode
->i_lock
);
168 void nfs_zap_acl_cache(struct inode
*inode
)
170 void (*clear_acl_cache
)(struct inode
*);
172 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
173 if (clear_acl_cache
!= NULL
)
174 clear_acl_cache(inode
);
175 spin_lock(&inode
->i_lock
);
176 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
177 spin_unlock(&inode
->i_lock
);
180 void nfs_invalidate_atime(struct inode
*inode
)
182 spin_lock(&inode
->i_lock
);
183 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
184 spin_unlock(&inode
->i_lock
);
188 * Invalidate, but do not unhash, the inode.
189 * NB: must be called with inode->i_lock held!
191 static void nfs_invalidate_inode(struct inode
*inode
)
193 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
194 nfs_zap_caches_locked(inode
);
197 struct nfs_find_desc
{
199 struct nfs_fattr
*fattr
;
203 * In NFSv3 we can have 64bit inode numbers. In order to support
204 * this, and re-exported directories (also seen in NFSv2)
205 * we are forced to allow 2 different inodes to have the same
209 nfs_find_actor(struct inode
*inode
, void *opaque
)
211 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
212 struct nfs_fh
*fh
= desc
->fh
;
213 struct nfs_fattr
*fattr
= desc
->fattr
;
215 if (NFS_FILEID(inode
) != fattr
->fileid
)
217 if (nfs_compare_fh(NFS_FH(inode
), fh
))
219 if (is_bad_inode(inode
) || NFS_STALE(inode
))
225 nfs_init_locked(struct inode
*inode
, void *opaque
)
227 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
228 struct nfs_fattr
*fattr
= desc
->fattr
;
230 set_nfs_fileid(inode
, fattr
->fileid
);
231 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
235 /* Don't use READDIRPLUS on directories that we believe are too large */
236 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
239 * This is our front-end to iget that looks up inodes by file handle
240 * instead of inode number.
243 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
245 struct nfs_find_desc desc
= {
249 struct inode
*inode
= ERR_PTR(-ENOENT
);
252 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
254 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
257 hash
= nfs_fattr_to_ino_t(fattr
);
259 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
261 inode
= ERR_PTR(-ENOMEM
);
265 if (inode
->i_state
& I_NEW
) {
266 struct nfs_inode
*nfsi
= NFS_I(inode
);
267 unsigned long now
= jiffies
;
269 /* We set i_ino for the few things that still rely on it,
273 /* We can't support update_atime(), since the server will reset it */
274 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
275 inode
->i_mode
= fattr
->mode
;
276 /* Why so? Because we want revalidate for devices/FIFOs, and
277 * that's precisely what we have in nfs_file_inode_operations.
279 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
280 if (S_ISREG(inode
->i_mode
)) {
281 inode
->i_fop
= &nfs_file_operations
;
282 inode
->i_data
.a_ops
= &nfs_file_aops
;
283 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
284 } else if (S_ISDIR(inode
->i_mode
)) {
285 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
286 inode
->i_fop
= &nfs_dir_operations
;
287 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
288 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
289 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
290 /* Deal with crossing mountpoints */
291 if ((fattr
->valid
& NFS_ATTR_FATTR_FSID
)
292 && !nfs_fsid_equal(&NFS_SB(sb
)->fsid
, &fattr
->fsid
)) {
293 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
294 inode
->i_op
= &nfs_referral_inode_operations
;
296 inode
->i_op
= &nfs_mountpoint_inode_operations
;
298 set_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
);
300 } else if (S_ISLNK(inode
->i_mode
))
301 inode
->i_op
= &nfs_symlink_inode_operations
;
303 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
305 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
306 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
307 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
308 nfsi
->change_attr
= 0;
314 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
316 nfsi
->read_cache_jiffies
= fattr
->time_start
;
317 nfsi
->attr_gencount
= fattr
->gencount
;
318 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
319 inode
->i_atime
= fattr
->atime
;
320 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
321 inode
->i_mtime
= fattr
->mtime
;
322 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
323 inode
->i_ctime
= fattr
->ctime
;
324 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
325 nfsi
->change_attr
= fattr
->change_attr
;
326 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
327 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
328 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
329 inode
->i_nlink
= fattr
->nlink
;
330 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
331 inode
->i_uid
= fattr
->uid
;
332 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
333 inode
->i_gid
= fattr
->gid
;
334 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
335 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
336 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
338 * report the blocks in 512byte units
340 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
342 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
343 nfsi
->attrtimeo_timestamp
= now
;
344 nfsi
->access_cache
= RB_ROOT
;
346 unlock_new_inode(inode
);
348 nfs_refresh_inode(inode
, fattr
);
349 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
351 (long long)NFS_FILEID(inode
),
352 atomic_read(&inode
->i_count
));
358 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
362 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
365 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
367 struct inode
*inode
= dentry
->d_inode
;
368 struct nfs_fattr fattr
;
371 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
373 /* skip mode change if it's just for clearing setuid/setgid */
374 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
375 attr
->ia_valid
&= ~ATTR_MODE
;
377 if (attr
->ia_valid
& ATTR_SIZE
) {
378 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
379 attr
->ia_valid
&= ~ATTR_SIZE
;
382 /* Optimization: if the end result is no change, don't RPC */
383 attr
->ia_valid
&= NFS_VALID_ATTRS
;
384 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
387 /* Write all dirty data */
388 if (S_ISREG(inode
->i_mode
)) {
389 filemap_write_and_wait(inode
->i_mapping
);
393 * Return any delegations if we're going to change ACLs
395 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
396 nfs_inode_return_delegation(inode
);
397 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
399 nfs_refresh_inode(inode
, &fattr
);
404 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
405 * @inode: inode of the file used
406 * @offset: file offset to start truncating
408 * This is a copy of the common vmtruncate, but with the locking
409 * corrected to take into account the fact that NFS requires
410 * inode->i_size to be updated under the inode->i_lock.
412 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
414 if (i_size_read(inode
) < offset
) {
417 limit
= current
->signal
->rlim
[RLIMIT_FSIZE
].rlim_cur
;
418 if (limit
!= RLIM_INFINITY
&& offset
> limit
)
420 if (offset
> inode
->i_sb
->s_maxbytes
)
422 spin_lock(&inode
->i_lock
);
423 i_size_write(inode
, offset
);
424 spin_unlock(&inode
->i_lock
);
426 struct address_space
*mapping
= inode
->i_mapping
;
429 * truncation of in-use swapfiles is disallowed - it would
430 * cause subsequent swapout to scribble on the now-freed
433 if (IS_SWAPFILE(inode
))
435 spin_lock(&inode
->i_lock
);
436 i_size_write(inode
, offset
);
437 spin_unlock(&inode
->i_lock
);
440 * unmap_mapping_range is called twice, first simply for
441 * efficiency so that truncate_inode_pages does fewer
442 * single-page unmaps. However after this first call, and
443 * before truncate_inode_pages finishes, it is possible for
444 * private pages to be COWed, which remain after
445 * truncate_inode_pages finishes, hence the second
446 * unmap_mapping_range call must be made for correctness.
448 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
449 truncate_inode_pages(mapping
, offset
);
450 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
454 send_sig(SIGXFSZ
, current
, 0);
460 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
461 * @inode: pointer to struct inode
462 * @attr: pointer to struct iattr
464 * Note: we do this in the *proc.c in order to ensure that
465 * it works for things like exclusive creates too.
467 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
469 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
470 spin_lock(&inode
->i_lock
);
471 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
472 int mode
= attr
->ia_mode
& S_IALLUGO
;
473 mode
|= inode
->i_mode
& ~S_IALLUGO
;
474 inode
->i_mode
= mode
;
476 if ((attr
->ia_valid
& ATTR_UID
) != 0)
477 inode
->i_uid
= attr
->ia_uid
;
478 if ((attr
->ia_valid
& ATTR_GID
) != 0)
479 inode
->i_gid
= attr
->ia_gid
;
480 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
481 spin_unlock(&inode
->i_lock
);
483 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
484 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
485 nfs_vmtruncate(inode
, attr
->ia_size
);
489 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
491 struct inode
*inode
= dentry
->d_inode
;
492 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
496 * Flush out writes to the server in order to update c/mtime.
498 * Hold the i_mutex to suspend application writes temporarily;
499 * this prevents long-running writing applications from blocking
502 if (S_ISREG(inode
->i_mode
)) {
503 mutex_lock(&inode
->i_mutex
);
504 nfs_wb_nocommit(inode
);
505 mutex_unlock(&inode
->i_mutex
);
509 * We may force a getattr if the user cares about atime.
511 * Note that we only have to check the vfsmount flags here:
512 * - NFS always sets S_NOATIME by so checking it would give a
514 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
515 * no point in checking those.
517 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
518 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
522 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
524 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
526 generic_fillattr(inode
, stat
);
527 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
532 static struct nfs_open_context
*alloc_nfs_open_context(struct vfsmount
*mnt
, struct dentry
*dentry
, struct rpc_cred
*cred
)
534 struct nfs_open_context
*ctx
;
536 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
538 ctx
->path
.dentry
= dget(dentry
);
539 ctx
->path
.mnt
= mntget(mnt
);
540 ctx
->cred
= get_rpccred(cred
);
542 ctx
->lockowner
= current
->files
;
546 atomic_set(&ctx
->count
, 1);
551 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
554 atomic_inc(&ctx
->count
);
558 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int wait
)
565 inode
= ctx
->path
.dentry
->d_inode
;
566 if (!atomic_dec_and_lock(&ctx
->count
, &inode
->i_lock
))
568 list_del(&ctx
->list
);
569 spin_unlock(&inode
->i_lock
);
570 if (ctx
->state
!= NULL
) {
572 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
574 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
576 if (ctx
->cred
!= NULL
)
577 put_rpccred(ctx
->cred
);
578 path_put(&ctx
->path
);
582 void put_nfs_open_context(struct nfs_open_context
*ctx
)
584 __put_nfs_open_context(ctx
, 0);
587 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
589 __put_nfs_open_context(ctx
, 1);
593 * Ensure that mmap has a recent RPC credential for use when writing out
596 static void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
598 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
599 struct nfs_inode
*nfsi
= NFS_I(inode
);
601 filp
->private_data
= get_nfs_open_context(ctx
);
602 spin_lock(&inode
->i_lock
);
603 list_add(&ctx
->list
, &nfsi
->open_files
);
604 spin_unlock(&inode
->i_lock
);
608 * Given an inode, search for an open context with the desired characteristics
610 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
612 struct nfs_inode
*nfsi
= NFS_I(inode
);
613 struct nfs_open_context
*pos
, *ctx
= NULL
;
615 spin_lock(&inode
->i_lock
);
616 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
617 if (cred
!= NULL
&& pos
->cred
!= cred
)
619 if ((pos
->mode
& mode
) == mode
) {
620 ctx
= get_nfs_open_context(pos
);
624 spin_unlock(&inode
->i_lock
);
628 static void nfs_file_clear_open_context(struct file
*filp
)
630 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
631 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
634 filp
->private_data
= NULL
;
635 spin_lock(&inode
->i_lock
);
636 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
637 spin_unlock(&inode
->i_lock
);
638 put_nfs_open_context_sync(ctx
);
643 * These allocate and release file read/write context information.
645 int nfs_open(struct inode
*inode
, struct file
*filp
)
647 struct nfs_open_context
*ctx
;
648 struct rpc_cred
*cred
;
650 cred
= rpc_lookup_cred();
652 return PTR_ERR(cred
);
653 ctx
= alloc_nfs_open_context(filp
->f_path
.mnt
, filp
->f_path
.dentry
, cred
);
657 ctx
->mode
= filp
->f_mode
;
658 nfs_file_set_open_context(filp
, ctx
);
659 put_nfs_open_context(ctx
);
663 int nfs_release(struct inode
*inode
, struct file
*filp
)
665 nfs_file_clear_open_context(filp
);
670 * This function is called whenever some part of NFS notices that
671 * the cached attributes have to be refreshed.
674 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
676 int status
= -ESTALE
;
677 struct nfs_fattr fattr
;
678 struct nfs_inode
*nfsi
= NFS_I(inode
);
680 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
681 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
683 if (is_bad_inode(inode
))
685 if (NFS_STALE(inode
))
688 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
689 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
691 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
693 (long long)NFS_FILEID(inode
), status
);
694 if (status
== -ESTALE
) {
695 nfs_zap_caches(inode
);
696 if (!S_ISDIR(inode
->i_mode
))
697 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
702 status
= nfs_refresh_inode(inode
, &fattr
);
704 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
706 (long long)NFS_FILEID(inode
), status
);
710 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
711 nfs_zap_acl_cache(inode
);
713 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
715 (long long)NFS_FILEID(inode
));
721 int nfs_attribute_timeout(struct inode
*inode
)
723 struct nfs_inode
*nfsi
= NFS_I(inode
);
725 if (nfs_have_delegation(inode
, FMODE_READ
))
727 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
731 * nfs_revalidate_inode - Revalidate the inode attributes
732 * @server - pointer to nfs_server struct
733 * @inode - pointer to inode struct
735 * Updates inode attribute information by retrieving the data from the server.
737 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
739 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
740 && !nfs_attribute_timeout(inode
))
741 return NFS_STALE(inode
) ? -ESTALE
: 0;
742 return __nfs_revalidate_inode(server
, inode
);
745 static int nfs_invalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
747 struct nfs_inode
*nfsi
= NFS_I(inode
);
749 if (mapping
->nrpages
!= 0) {
750 int ret
= invalidate_inode_pages2(mapping
);
754 spin_lock(&inode
->i_lock
);
755 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
756 if (S_ISDIR(inode
->i_mode
))
757 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
758 spin_unlock(&inode
->i_lock
);
759 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
760 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
761 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
765 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
769 mutex_lock(&inode
->i_mutex
);
770 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_DATA
) {
771 ret
= nfs_sync_mapping(mapping
);
773 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
775 mutex_unlock(&inode
->i_mutex
);
780 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
781 * @inode - pointer to host inode
782 * @mapping - pointer to mapping
784 int nfs_revalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
786 struct nfs_inode
*nfsi
= NFS_I(inode
);
789 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
790 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
791 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
795 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
796 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
802 * nfs_revalidate_mapping - Revalidate the pagecache
803 * @inode - pointer to host inode
804 * @mapping - pointer to mapping
806 * This version of the function will take the inode->i_mutex and attempt to
807 * flush out all dirty data if it needs to invalidate the page cache.
809 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
811 struct nfs_inode
*nfsi
= NFS_I(inode
);
814 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
815 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
816 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
820 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
821 ret
= nfs_invalidate_mapping(inode
, mapping
);
826 static void nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
828 struct nfs_inode
*nfsi
= NFS_I(inode
);
830 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
831 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
832 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
833 nfsi
->change_attr
= fattr
->change_attr
;
834 if (S_ISDIR(inode
->i_mode
))
835 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
837 /* If we have atomic WCC data, we may update some attributes */
838 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
839 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
840 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
841 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
843 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
844 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
845 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
846 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
847 if (S_ISDIR(inode
->i_mode
))
848 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
850 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
851 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
852 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
853 && nfsi
->npages
== 0)
854 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
858 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
859 * @inode - pointer to inode
860 * @fattr - updated attributes
862 * Verifies the attribute cache. If we have just changed the attributes,
863 * so that fattr carries weak cache consistency data, then it may
864 * also update the ctime/mtime/change_attribute.
866 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
868 struct nfs_inode
*nfsi
= NFS_I(inode
);
869 loff_t cur_size
, new_isize
;
870 unsigned long invalid
= 0;
873 /* Has the inode gone and changed behind our back? */
874 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
876 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
879 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
880 nfsi
->change_attr
!= fattr
->change_attr
)
881 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
883 /* Verify a few of the more important attributes */
884 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
885 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
887 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
888 cur_size
= i_size_read(inode
);
889 new_isize
= nfs_size_to_loff_t(fattr
->size
);
890 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
891 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
894 /* Have any file permissions changed? */
895 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
896 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
897 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
898 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
899 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
900 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
902 /* Has the link count changed? */
903 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
904 invalid
|= NFS_INO_INVALID_ATTR
;
906 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
907 invalid
|= NFS_INO_INVALID_ATIME
;
910 nfsi
->cache_validity
|= invalid
;
912 nfsi
->read_cache_jiffies
= fattr
->time_start
;
916 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
918 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
920 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
923 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
925 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
927 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
930 static atomic_long_t nfs_attr_generation_counter
;
932 static unsigned long nfs_read_attr_generation_counter(void)
934 return atomic_long_read(&nfs_attr_generation_counter
);
937 unsigned long nfs_inc_attr_generation_counter(void)
939 return atomic_long_inc_return(&nfs_attr_generation_counter
);
942 void nfs_fattr_init(struct nfs_fattr
*fattr
)
945 fattr
->time_start
= jiffies
;
946 fattr
->gencount
= nfs_inc_attr_generation_counter();
950 * nfs_inode_attrs_need_update - check if the inode attributes need updating
951 * @inode - pointer to inode
952 * @fattr - attributes
954 * Attempt to divine whether or not an RPC call reply carrying stale
955 * attributes got scheduled after another call carrying updated ones.
957 * To do so, the function first assumes that a more recent ctime means
958 * that the attributes in fattr are newer, however it also attempt to
959 * catch the case where ctime either didn't change, or went backwards
960 * (if someone reset the clock on the server) by looking at whether
961 * or not this RPC call was started after the inode was last updated.
962 * Note also the check for wraparound of 'attr_gencount'
964 * The function returns 'true' if it thinks the attributes in 'fattr' are
965 * more recent than the ones cached in the inode.
968 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
970 const struct nfs_inode
*nfsi
= NFS_I(inode
);
972 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
973 nfs_ctime_need_update(inode
, fattr
) ||
974 nfs_size_need_update(inode
, fattr
) ||
975 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
978 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
980 if (nfs_inode_attrs_need_update(inode
, fattr
))
981 return nfs_update_inode(inode
, fattr
);
982 return nfs_check_inode_attributes(inode
, fattr
);
986 * nfs_refresh_inode - try to update the inode attribute cache
987 * @inode - pointer to inode
988 * @fattr - updated attributes
990 * Check that an RPC call that returned attributes has not overlapped with
991 * other recent updates of the inode metadata, then decide whether it is
992 * safe to do a full update of the inode attributes, or whether just to
993 * call nfs_check_inode_attributes.
995 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
999 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1001 spin_lock(&inode
->i_lock
);
1002 status
= nfs_refresh_inode_locked(inode
, fattr
);
1003 spin_unlock(&inode
->i_lock
);
1007 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1009 struct nfs_inode
*nfsi
= NFS_I(inode
);
1011 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1012 if (S_ISDIR(inode
->i_mode
))
1013 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1014 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1016 return nfs_refresh_inode_locked(inode
, fattr
);
1020 * nfs_post_op_update_inode - try to update the inode attribute cache
1021 * @inode - pointer to inode
1022 * @fattr - updated attributes
1024 * After an operation that has changed the inode metadata, mark the
1025 * attribute cache as being invalid, then try to update it.
1027 * NB: if the server didn't return any post op attributes, this
1028 * function will force the retrieval of attributes before the next
1029 * NFS request. Thus it should be used only for operations that
1030 * are expected to change one or more attributes, to avoid
1031 * unnecessary NFS requests and trips through nfs_update_inode().
1033 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1037 spin_lock(&inode
->i_lock
);
1038 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1039 spin_unlock(&inode
->i_lock
);
1044 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1045 * @inode - pointer to inode
1046 * @fattr - updated attributes
1048 * After an operation that has changed the inode metadata, mark the
1049 * attribute cache as being invalid, then try to update it. Fake up
1050 * weak cache consistency data, if none exist.
1052 * This function is mainly designed to be used by the ->write_done() functions.
1054 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1058 spin_lock(&inode
->i_lock
);
1059 /* Don't do a WCC update if these attributes are already stale */
1060 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1061 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1062 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1063 | NFS_ATTR_FATTR_PRESIZE
1064 | NFS_ATTR_FATTR_PREMTIME
1065 | NFS_ATTR_FATTR_PRECTIME
);
1068 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1069 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1070 fattr
->pre_change_attr
= NFS_I(inode
)->change_attr
;
1071 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1073 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1074 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1075 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1076 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1078 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1079 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1080 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1081 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1083 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1084 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1085 fattr
->pre_size
= i_size_read(inode
);
1086 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1089 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1090 spin_unlock(&inode
->i_lock
);
1095 * Many nfs protocol calls return the new file attributes after
1096 * an operation. Here we update the inode to reflect the state
1097 * of the server's inode.
1099 * This is a bit tricky because we have to make sure all dirty pages
1100 * have been sent off to the server before calling invalidate_inode_pages.
1101 * To make sure no other process adds more write requests while we try
1102 * our best to flush them, we make them sleep during the attribute refresh.
1104 * A very similar scenario holds for the dir cache.
1106 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1108 struct nfs_server
*server
;
1109 struct nfs_inode
*nfsi
= NFS_I(inode
);
1110 loff_t cur_isize
, new_isize
;
1111 unsigned long invalid
= 0;
1112 unsigned long now
= jiffies
;
1114 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1115 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1116 atomic_read(&inode
->i_count
), fattr
->valid
);
1118 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1122 * Make sure the inode's type hasn't changed.
1124 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1127 server
= NFS_SERVER(inode
);
1128 /* Update the fsid? */
1129 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1130 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1131 !test_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
))
1132 server
->fsid
= fattr
->fsid
;
1135 * Update the read time so we don't revalidate too often.
1137 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1139 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) || (fattr
->valid
& (NFS_ATTR_FATTR_MTIME
|NFS_ATTR_FATTR_CTIME
)))
1140 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1141 | NFS_INO_INVALID_ATIME
1142 | NFS_INO_REVAL_PAGECACHE
);
1144 /* Do atomic weak cache consistency updates */
1145 nfs_wcc_update_inode(inode
, fattr
);
1147 /* More cache consistency checks */
1148 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1149 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1150 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1151 inode
->i_sb
->s_id
, inode
->i_ino
);
1152 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1153 if (S_ISDIR(inode
->i_mode
))
1154 nfs_force_lookup_revalidate(inode
);
1155 nfsi
->change_attr
= fattr
->change_attr
;
1159 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1160 /* NFSv2/v3: Check if the mtime agrees */
1161 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1162 dprintk("NFS: mtime change on server for file %s/%ld\n",
1163 inode
->i_sb
->s_id
, inode
->i_ino
);
1164 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1165 if (S_ISDIR(inode
->i_mode
))
1166 nfs_force_lookup_revalidate(inode
);
1167 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1170 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1171 /* If ctime has changed we should definitely clear access+acl caches */
1172 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1173 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1174 /* and probably clear data for a directory too as utimes can cause
1175 * havoc with our cache.
1177 if (S_ISDIR(inode
->i_mode
)) {
1178 invalid
|= NFS_INO_INVALID_DATA
;
1179 nfs_force_lookup_revalidate(inode
);
1181 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1185 /* Check if our cached file size is stale */
1186 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1187 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1188 cur_isize
= i_size_read(inode
);
1189 if (new_isize
!= cur_isize
) {
1190 /* Do we perhaps have any outstanding writes, or has
1191 * the file grown beyond our last write? */
1192 if (nfsi
->npages
== 0 || new_isize
> cur_isize
) {
1193 i_size_write(inode
, new_isize
);
1194 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1196 dprintk("NFS: isize change on server for file %s/%ld\n",
1197 inode
->i_sb
->s_id
, inode
->i_ino
);
1202 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1203 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1205 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1206 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1207 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1208 inode
->i_mode
= fattr
->mode
;
1211 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1212 if (inode
->i_uid
!= fattr
->uid
) {
1213 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1214 inode
->i_uid
= fattr
->uid
;
1217 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1218 if (inode
->i_gid
!= fattr
->gid
) {
1219 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1220 inode
->i_gid
= fattr
->gid
;
1224 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1225 if (inode
->i_nlink
!= fattr
->nlink
) {
1226 invalid
|= NFS_INO_INVALID_ATTR
;
1227 if (S_ISDIR(inode
->i_mode
))
1228 invalid
|= NFS_INO_INVALID_DATA
;
1229 inode
->i_nlink
= fattr
->nlink
;
1233 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1235 * report the blocks in 512byte units
1237 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1239 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1240 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1242 /* Update attrtimeo value if we're out of the unstable period */
1243 if (invalid
& NFS_INO_INVALID_ATTR
) {
1244 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1245 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1246 nfsi
->attrtimeo_timestamp
= now
;
1247 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1249 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1250 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1251 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1252 nfsi
->attrtimeo_timestamp
= now
;
1255 invalid
&= ~NFS_INO_INVALID_ATTR
;
1256 /* Don't invalidate the data if we were to blame */
1257 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1258 || S_ISLNK(inode
->i_mode
)))
1259 invalid
&= ~NFS_INO_INVALID_DATA
;
1260 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1261 (nfsi
->cache_validity
& NFS_INO_REVAL_FORCED
))
1262 nfsi
->cache_validity
|= invalid
;
1263 nfsi
->cache_validity
&= ~NFS_INO_REVAL_FORCED
;
1268 * Big trouble! The inode has become a different object.
1270 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1271 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1274 * No need to worry about unhashing the dentry, as the
1275 * lookup validation will know that the inode is bad.
1276 * (But we fall through to invalidate the caches.)
1278 nfs_invalidate_inode(inode
);
1282 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1283 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1284 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1285 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1290 #ifdef CONFIG_NFS_V4
1293 * Clean out any remaining NFSv4 state that might be left over due
1294 * to open() calls that passed nfs_atomic_lookup, but failed to call
1297 void nfs4_clear_inode(struct inode
*inode
)
1299 /* If we are holding a delegation, return it! */
1300 nfs_inode_return_delegation_noreclaim(inode
);
1301 /* First call standard NFS clear_inode() code */
1302 nfs_clear_inode(inode
);
1306 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1308 struct nfs_inode
*nfsi
;
1309 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1313 nfsi
->cache_validity
= 0UL;
1314 #ifdef CONFIG_NFS_V3_ACL
1315 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1316 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1318 #ifdef CONFIG_NFS_V4
1319 nfsi
->nfs4_acl
= NULL
;
1320 #endif /* CONFIG_NFS_V4 */
1321 return &nfsi
->vfs_inode
;
1324 void nfs_destroy_inode(struct inode
*inode
)
1326 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1329 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1331 #ifdef CONFIG_NFS_V4
1332 INIT_LIST_HEAD(&nfsi
->open_states
);
1333 nfsi
->delegation
= NULL
;
1334 nfsi
->delegation_state
= 0;
1335 init_rwsem(&nfsi
->rwsem
);
1339 static void init_once(void *foo
)
1341 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1343 inode_init_once(&nfsi
->vfs_inode
);
1344 INIT_LIST_HEAD(&nfsi
->open_files
);
1345 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1346 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1347 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1350 atomic_set(&nfsi
->silly_count
, 1);
1351 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1352 init_waitqueue_head(&nfsi
->waitqueue
);
1353 nfs4_init_once(nfsi
);
1356 static int __init
nfs_init_inodecache(void)
1358 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1359 sizeof(struct nfs_inode
),
1360 0, (SLAB_RECLAIM_ACCOUNT
|
1363 if (nfs_inode_cachep
== NULL
)
1369 static void nfs_destroy_inodecache(void)
1371 kmem_cache_destroy(nfs_inode_cachep
);
1374 struct workqueue_struct
*nfsiod_workqueue
;
1377 * start up the nfsiod workqueue
1379 static int nfsiod_start(void)
1381 struct workqueue_struct
*wq
;
1382 dprintk("RPC: creating workqueue nfsiod\n");
1383 wq
= create_singlethread_workqueue("nfsiod");
1386 nfsiod_workqueue
= wq
;
1391 * Destroy the nfsiod workqueue
1393 static void nfsiod_stop(void)
1395 struct workqueue_struct
*wq
;
1397 wq
= nfsiod_workqueue
;
1400 nfsiod_workqueue
= NULL
;
1401 destroy_workqueue(wq
);
1407 static int __init
init_nfs_fs(void)
1411 err
= nfsiod_start();
1415 err
= nfs_fs_proc_init();
1419 err
= nfs_init_nfspagecache();
1423 err
= nfs_init_inodecache();
1427 err
= nfs_init_readpagecache();
1431 err
= nfs_init_writepagecache();
1435 err
= nfs_init_directcache();
1439 #ifdef CONFIG_PROC_FS
1440 rpc_proc_register(&nfs_rpcstat
);
1442 if ((err
= register_nfs_fs()) != 0)
1446 #ifdef CONFIG_PROC_FS
1447 rpc_proc_unregister("nfs");
1449 nfs_destroy_directcache();
1451 nfs_destroy_writepagecache();
1453 nfs_destroy_readpagecache();
1455 nfs_destroy_inodecache();
1457 nfs_destroy_nfspagecache();
1466 static void __exit
exit_nfs_fs(void)
1468 nfs_destroy_directcache();
1469 nfs_destroy_writepagecache();
1470 nfs_destroy_readpagecache();
1471 nfs_destroy_inodecache();
1472 nfs_destroy_nfspagecache();
1473 #ifdef CONFIG_PROC_FS
1474 rpc_proc_unregister("nfs");
1476 unregister_nfs_fs();
1481 /* Not quite true; I just maintain it */
1482 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1483 MODULE_LICENSE("GPL");
1484 module_param(enable_ino64
, bool, 0644);
1486 module_init(init_nfs_fs
)
1487 module_exit(exit_nfs_fs
)