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"
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 int nfs_write_inode(struct inode
*inode
, int sync
)
105 ret
= filemap_fdatawait(inode
->i_mapping
);
107 ret
= nfs_commit_inode(inode
, FLUSH_SYNC
);
109 ret
= nfs_commit_inode(inode
, 0);
112 __mark_inode_dirty(inode
, I_DIRTY_DATASYNC
);
116 void nfs_clear_inode(struct inode
*inode
)
119 * The following should never happen...
121 BUG_ON(nfs_have_writebacks(inode
));
122 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
123 nfs_zap_acl_cache(inode
);
124 nfs_access_zap_cache(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)
136 unmap_mapping_range(mapping
, 0, 0, 0);
137 ret
= filemap_write_and_wait(mapping
);
140 ret
= nfs_wb_all(mapping
->host
);
146 * Invalidate the local caches
148 static void nfs_zap_caches_locked(struct inode
*inode
)
150 struct nfs_inode
*nfsi
= NFS_I(inode
);
151 int mode
= inode
->i_mode
;
153 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
155 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
156 nfsi
->attrtimeo_timestamp
= jiffies
;
158 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
159 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
160 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
162 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
165 void nfs_zap_caches(struct inode
*inode
)
167 spin_lock(&inode
->i_lock
);
168 nfs_zap_caches_locked(inode
);
169 spin_unlock(&inode
->i_lock
);
172 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
174 if (mapping
->nrpages
!= 0) {
175 spin_lock(&inode
->i_lock
);
176 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_DATA
;
177 spin_unlock(&inode
->i_lock
);
181 void nfs_zap_acl_cache(struct inode
*inode
)
183 void (*clear_acl_cache
)(struct inode
*);
185 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
186 if (clear_acl_cache
!= NULL
)
187 clear_acl_cache(inode
);
188 spin_lock(&inode
->i_lock
);
189 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
190 spin_unlock(&inode
->i_lock
);
193 void nfs_invalidate_atime(struct inode
*inode
)
195 spin_lock(&inode
->i_lock
);
196 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
197 spin_unlock(&inode
->i_lock
);
201 * Invalidate, but do not unhash, the inode.
202 * NB: must be called with inode->i_lock held!
204 static void nfs_invalidate_inode(struct inode
*inode
)
206 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
207 nfs_zap_caches_locked(inode
);
210 struct nfs_find_desc
{
212 struct nfs_fattr
*fattr
;
216 * In NFSv3 we can have 64bit inode numbers. In order to support
217 * this, and re-exported directories (also seen in NFSv2)
218 * we are forced to allow 2 different inodes to have the same
222 nfs_find_actor(struct inode
*inode
, void *opaque
)
224 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
225 struct nfs_fh
*fh
= desc
->fh
;
226 struct nfs_fattr
*fattr
= desc
->fattr
;
228 if (NFS_FILEID(inode
) != fattr
->fileid
)
230 if (nfs_compare_fh(NFS_FH(inode
), fh
))
232 if (is_bad_inode(inode
) || NFS_STALE(inode
))
238 nfs_init_locked(struct inode
*inode
, void *opaque
)
240 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
241 struct nfs_fattr
*fattr
= desc
->fattr
;
243 set_nfs_fileid(inode
, fattr
->fileid
);
244 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
248 /* Don't use READDIRPLUS on directories that we believe are too large */
249 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
252 * This is our front-end to iget that looks up inodes by file handle
253 * instead of inode number.
256 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
258 struct nfs_find_desc desc
= {
262 struct inode
*inode
= ERR_PTR(-ENOENT
);
265 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
267 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
270 hash
= nfs_fattr_to_ino_t(fattr
);
272 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
274 inode
= ERR_PTR(-ENOMEM
);
278 if (inode
->i_state
& I_NEW
) {
279 struct nfs_inode
*nfsi
= NFS_I(inode
);
280 unsigned long now
= jiffies
;
282 /* We set i_ino for the few things that still rely on it,
286 /* We can't support update_atime(), since the server will reset it */
287 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
288 inode
->i_mode
= fattr
->mode
;
289 /* Why so? Because we want revalidate for devices/FIFOs, and
290 * that's precisely what we have in nfs_file_inode_operations.
292 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
293 if (S_ISREG(inode
->i_mode
)) {
294 inode
->i_fop
= &nfs_file_operations
;
295 inode
->i_data
.a_ops
= &nfs_file_aops
;
296 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
297 } else if (S_ISDIR(inode
->i_mode
)) {
298 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
299 inode
->i_fop
= &nfs_dir_operations
;
300 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
301 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
302 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
303 /* Deal with crossing mountpoints */
304 if ((fattr
->valid
& NFS_ATTR_FATTR_FSID
)
305 && !nfs_fsid_equal(&NFS_SB(sb
)->fsid
, &fattr
->fsid
)) {
306 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
307 inode
->i_op
= &nfs_referral_inode_operations
;
309 inode
->i_op
= &nfs_mountpoint_inode_operations
;
311 set_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
);
313 } else if (S_ISLNK(inode
->i_mode
))
314 inode
->i_op
= &nfs_symlink_inode_operations
;
316 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
318 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
319 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
320 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
321 nfsi
->change_attr
= 0;
327 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
329 nfsi
->read_cache_jiffies
= fattr
->time_start
;
330 nfsi
->attr_gencount
= fattr
->gencount
;
331 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
332 inode
->i_atime
= fattr
->atime
;
333 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
334 inode
->i_mtime
= fattr
->mtime
;
335 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
336 inode
->i_ctime
= fattr
->ctime
;
337 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
338 nfsi
->change_attr
= fattr
->change_attr
;
339 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
340 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
341 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
342 inode
->i_nlink
= fattr
->nlink
;
343 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
344 inode
->i_uid
= fattr
->uid
;
345 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
346 inode
->i_gid
= fattr
->gid
;
347 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
348 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
349 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
351 * report the blocks in 512byte units
353 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
355 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
356 nfsi
->attrtimeo_timestamp
= now
;
357 nfsi
->access_cache
= RB_ROOT
;
359 unlock_new_inode(inode
);
361 nfs_refresh_inode(inode
, fattr
);
362 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
364 (long long)NFS_FILEID(inode
),
365 atomic_read(&inode
->i_count
));
371 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
375 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
378 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
380 struct inode
*inode
= dentry
->d_inode
;
381 struct nfs_fattr fattr
;
384 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
386 /* skip mode change if it's just for clearing setuid/setgid */
387 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
388 attr
->ia_valid
&= ~ATTR_MODE
;
390 if (attr
->ia_valid
& ATTR_SIZE
) {
391 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
392 attr
->ia_valid
&= ~ATTR_SIZE
;
395 /* Optimization: if the end result is no change, don't RPC */
396 attr
->ia_valid
&= NFS_VALID_ATTRS
;
397 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
400 /* Write all dirty data */
401 if (S_ISREG(inode
->i_mode
)) {
402 filemap_write_and_wait(inode
->i_mapping
);
406 * Return any delegations if we're going to change ACLs
408 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
409 nfs_inode_return_delegation(inode
);
410 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
412 nfs_refresh_inode(inode
, &fattr
);
417 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
418 * @inode: inode of the file used
419 * @offset: file offset to start truncating
421 * This is a copy of the common vmtruncate, but with the locking
422 * corrected to take into account the fact that NFS requires
423 * inode->i_size to be updated under the inode->i_lock.
425 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
427 if (i_size_read(inode
) < offset
) {
430 limit
= current
->signal
->rlim
[RLIMIT_FSIZE
].rlim_cur
;
431 if (limit
!= RLIM_INFINITY
&& offset
> limit
)
433 if (offset
> inode
->i_sb
->s_maxbytes
)
435 spin_lock(&inode
->i_lock
);
436 i_size_write(inode
, offset
);
437 spin_unlock(&inode
->i_lock
);
439 struct address_space
*mapping
= inode
->i_mapping
;
442 * truncation of in-use swapfiles is disallowed - it would
443 * cause subsequent swapout to scribble on the now-freed
446 if (IS_SWAPFILE(inode
))
448 spin_lock(&inode
->i_lock
);
449 i_size_write(inode
, offset
);
450 spin_unlock(&inode
->i_lock
);
453 * unmap_mapping_range is called twice, first simply for
454 * efficiency so that truncate_inode_pages does fewer
455 * single-page unmaps. However after this first call, and
456 * before truncate_inode_pages finishes, it is possible for
457 * private pages to be COWed, which remain after
458 * truncate_inode_pages finishes, hence the second
459 * unmap_mapping_range call must be made for correctness.
461 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
462 truncate_inode_pages(mapping
, offset
);
463 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
467 send_sig(SIGXFSZ
, current
, 0);
473 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
474 * @inode: pointer to struct inode
475 * @attr: pointer to struct iattr
477 * Note: we do this in the *proc.c in order to ensure that
478 * it works for things like exclusive creates too.
480 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
482 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
483 spin_lock(&inode
->i_lock
);
484 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
485 int mode
= attr
->ia_mode
& S_IALLUGO
;
486 mode
|= inode
->i_mode
& ~S_IALLUGO
;
487 inode
->i_mode
= mode
;
489 if ((attr
->ia_valid
& ATTR_UID
) != 0)
490 inode
->i_uid
= attr
->ia_uid
;
491 if ((attr
->ia_valid
& ATTR_GID
) != 0)
492 inode
->i_gid
= attr
->ia_gid
;
493 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
494 spin_unlock(&inode
->i_lock
);
496 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
497 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
498 nfs_vmtruncate(inode
, attr
->ia_size
);
502 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
504 struct inode
*inode
= dentry
->d_inode
;
505 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
509 * Flush out writes to the server in order to update c/mtime.
511 * Hold the i_mutex to suspend application writes temporarily;
512 * this prevents long-running writing applications from blocking
515 if (S_ISREG(inode
->i_mode
)) {
516 mutex_lock(&inode
->i_mutex
);
517 nfs_wb_nocommit(inode
);
518 mutex_unlock(&inode
->i_mutex
);
522 * We may force a getattr if the user cares about atime.
524 * Note that we only have to check the vfsmount flags here:
525 * - NFS always sets S_NOATIME by so checking it would give a
527 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
528 * no point in checking those.
530 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
531 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
535 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
537 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
539 generic_fillattr(inode
, stat
);
540 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
546 * nfs_close_context - Common close_context() routine NFSv2/v3
547 * @ctx: pointer to context
548 * @is_sync: is this a synchronous close
550 * always ensure that the attributes are up to date if we're mounted
551 * with close-to-open semantics
553 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
556 struct nfs_server
*server
;
558 if (!(ctx
->mode
& FMODE_WRITE
))
562 inode
= ctx
->path
.dentry
->d_inode
;
563 if (!list_empty(&NFS_I(inode
)->open_files
))
565 server
= NFS_SERVER(inode
);
566 if (server
->flags
& NFS_MOUNT_NOCTO
)
568 nfs_revalidate_inode(server
, inode
);
571 static struct nfs_open_context
*alloc_nfs_open_context(struct vfsmount
*mnt
, struct dentry
*dentry
, struct rpc_cred
*cred
)
573 struct nfs_open_context
*ctx
;
575 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
577 ctx
->path
.dentry
= dget(dentry
);
578 ctx
->path
.mnt
= mntget(mnt
);
579 ctx
->cred
= get_rpccred(cred
);
581 ctx
->lockowner
= current
->files
;
585 atomic_set(&ctx
->count
, 1);
590 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
593 atomic_inc(&ctx
->count
);
597 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
599 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
601 if (!atomic_dec_and_lock(&ctx
->count
, &inode
->i_lock
))
603 list_del(&ctx
->list
);
604 spin_unlock(&inode
->i_lock
);
605 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
606 if (ctx
->cred
!= NULL
)
607 put_rpccred(ctx
->cred
);
608 path_put(&ctx
->path
);
612 void put_nfs_open_context(struct nfs_open_context
*ctx
)
614 __put_nfs_open_context(ctx
, 0);
617 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
619 __put_nfs_open_context(ctx
, 1);
623 * Ensure that mmap has a recent RPC credential for use when writing out
626 static void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
628 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
629 struct nfs_inode
*nfsi
= NFS_I(inode
);
631 filp
->private_data
= get_nfs_open_context(ctx
);
632 spin_lock(&inode
->i_lock
);
633 list_add(&ctx
->list
, &nfsi
->open_files
);
634 spin_unlock(&inode
->i_lock
);
638 * Given an inode, search for an open context with the desired characteristics
640 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
642 struct nfs_inode
*nfsi
= NFS_I(inode
);
643 struct nfs_open_context
*pos
, *ctx
= NULL
;
645 spin_lock(&inode
->i_lock
);
646 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
647 if (cred
!= NULL
&& pos
->cred
!= cred
)
649 if ((pos
->mode
& mode
) == mode
) {
650 ctx
= get_nfs_open_context(pos
);
654 spin_unlock(&inode
->i_lock
);
658 static void nfs_file_clear_open_context(struct file
*filp
)
660 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
661 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
664 filp
->private_data
= NULL
;
665 spin_lock(&inode
->i_lock
);
666 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
667 spin_unlock(&inode
->i_lock
);
668 put_nfs_open_context_sync(ctx
);
673 * These allocate and release file read/write context information.
675 int nfs_open(struct inode
*inode
, struct file
*filp
)
677 struct nfs_open_context
*ctx
;
678 struct rpc_cred
*cred
;
680 cred
= rpc_lookup_cred();
682 return PTR_ERR(cred
);
683 ctx
= alloc_nfs_open_context(filp
->f_path
.mnt
, filp
->f_path
.dentry
, cred
);
687 ctx
->mode
= filp
->f_mode
;
688 nfs_file_set_open_context(filp
, ctx
);
689 put_nfs_open_context(ctx
);
693 int nfs_release(struct inode
*inode
, struct file
*filp
)
695 nfs_file_clear_open_context(filp
);
700 * This function is called whenever some part of NFS notices that
701 * the cached attributes have to be refreshed.
704 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
706 int status
= -ESTALE
;
707 struct nfs_fattr fattr
;
708 struct nfs_inode
*nfsi
= NFS_I(inode
);
710 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
711 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
713 if (is_bad_inode(inode
))
715 if (NFS_STALE(inode
))
718 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
719 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
721 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
723 (long long)NFS_FILEID(inode
), status
);
724 if (status
== -ESTALE
) {
725 nfs_zap_caches(inode
);
726 if (!S_ISDIR(inode
->i_mode
))
727 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
732 status
= nfs_refresh_inode(inode
, &fattr
);
734 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
736 (long long)NFS_FILEID(inode
), status
);
740 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
741 nfs_zap_acl_cache(inode
);
743 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
745 (long long)NFS_FILEID(inode
));
751 int nfs_attribute_timeout(struct inode
*inode
)
753 struct nfs_inode
*nfsi
= NFS_I(inode
);
755 if (nfs_have_delegation(inode
, FMODE_READ
))
757 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
761 * nfs_revalidate_inode - Revalidate the inode attributes
762 * @server - pointer to nfs_server struct
763 * @inode - pointer to inode struct
765 * Updates inode attribute information by retrieving the data from the server.
767 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
769 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
770 && !nfs_attribute_timeout(inode
))
771 return NFS_STALE(inode
) ? -ESTALE
: 0;
772 return __nfs_revalidate_inode(server
, inode
);
775 static int nfs_invalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
777 struct nfs_inode
*nfsi
= NFS_I(inode
);
779 if (mapping
->nrpages
!= 0) {
780 int ret
= invalidate_inode_pages2(mapping
);
784 spin_lock(&inode
->i_lock
);
785 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
786 if (S_ISDIR(inode
->i_mode
))
787 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
788 spin_unlock(&inode
->i_lock
);
789 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
790 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
791 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
795 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
799 mutex_lock(&inode
->i_mutex
);
800 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_DATA
) {
801 ret
= nfs_sync_mapping(mapping
);
803 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
805 mutex_unlock(&inode
->i_mutex
);
810 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
811 * @inode - pointer to host inode
812 * @mapping - pointer to mapping
814 int nfs_revalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
816 struct nfs_inode
*nfsi
= NFS_I(inode
);
819 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
820 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
821 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
825 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
826 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
832 * nfs_revalidate_mapping - Revalidate the pagecache
833 * @inode - pointer to host inode
834 * @mapping - pointer to mapping
836 * This version of the function will take the inode->i_mutex and attempt to
837 * flush out all dirty data if it needs to invalidate the page cache.
839 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
841 struct nfs_inode
*nfsi
= NFS_I(inode
);
844 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
845 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
846 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
850 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
851 ret
= nfs_invalidate_mapping(inode
, mapping
);
856 static void nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
858 struct nfs_inode
*nfsi
= NFS_I(inode
);
860 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
861 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
862 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
863 nfsi
->change_attr
= fattr
->change_attr
;
864 if (S_ISDIR(inode
->i_mode
))
865 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
867 /* If we have atomic WCC data, we may update some attributes */
868 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
869 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
870 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
871 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
873 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
874 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
875 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
876 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
877 if (S_ISDIR(inode
->i_mode
))
878 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
880 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
881 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
882 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
883 && nfsi
->npages
== 0)
884 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
888 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
889 * @inode - pointer to inode
890 * @fattr - updated attributes
892 * Verifies the attribute cache. If we have just changed the attributes,
893 * so that fattr carries weak cache consistency data, then it may
894 * also update the ctime/mtime/change_attribute.
896 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
898 struct nfs_inode
*nfsi
= NFS_I(inode
);
899 loff_t cur_size
, new_isize
;
900 unsigned long invalid
= 0;
903 /* Has the inode gone and changed behind our back? */
904 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
906 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
909 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
910 nfsi
->change_attr
!= fattr
->change_attr
)
911 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
913 /* Verify a few of the more important attributes */
914 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
915 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
917 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
918 cur_size
= i_size_read(inode
);
919 new_isize
= nfs_size_to_loff_t(fattr
->size
);
920 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
921 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
924 /* Have any file permissions changed? */
925 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
926 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
927 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
928 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
929 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
930 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
932 /* Has the link count changed? */
933 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
934 invalid
|= NFS_INO_INVALID_ATTR
;
936 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
937 invalid
|= NFS_INO_INVALID_ATIME
;
940 nfsi
->cache_validity
|= invalid
;
942 nfsi
->read_cache_jiffies
= fattr
->time_start
;
946 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
948 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
950 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
953 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
955 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
957 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
960 static atomic_long_t nfs_attr_generation_counter
;
962 static unsigned long nfs_read_attr_generation_counter(void)
964 return atomic_long_read(&nfs_attr_generation_counter
);
967 unsigned long nfs_inc_attr_generation_counter(void)
969 return atomic_long_inc_return(&nfs_attr_generation_counter
);
972 void nfs_fattr_init(struct nfs_fattr
*fattr
)
975 fattr
->time_start
= jiffies
;
976 fattr
->gencount
= nfs_inc_attr_generation_counter();
980 * nfs_inode_attrs_need_update - check if the inode attributes need updating
981 * @inode - pointer to inode
982 * @fattr - attributes
984 * Attempt to divine whether or not an RPC call reply carrying stale
985 * attributes got scheduled after another call carrying updated ones.
987 * To do so, the function first assumes that a more recent ctime means
988 * that the attributes in fattr are newer, however it also attempt to
989 * catch the case where ctime either didn't change, or went backwards
990 * (if someone reset the clock on the server) by looking at whether
991 * or not this RPC call was started after the inode was last updated.
992 * Note also the check for wraparound of 'attr_gencount'
994 * The function returns 'true' if it thinks the attributes in 'fattr' are
995 * more recent than the ones cached in the inode.
998 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1000 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1002 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1003 nfs_ctime_need_update(inode
, fattr
) ||
1004 nfs_size_need_update(inode
, fattr
) ||
1005 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1008 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1010 if (nfs_inode_attrs_need_update(inode
, fattr
))
1011 return nfs_update_inode(inode
, fattr
);
1012 return nfs_check_inode_attributes(inode
, fattr
);
1016 * nfs_refresh_inode - try to update the inode attribute cache
1017 * @inode - pointer to inode
1018 * @fattr - updated attributes
1020 * Check that an RPC call that returned attributes has not overlapped with
1021 * other recent updates of the inode metadata, then decide whether it is
1022 * safe to do a full update of the inode attributes, or whether just to
1023 * call nfs_check_inode_attributes.
1025 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1029 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1031 spin_lock(&inode
->i_lock
);
1032 status
= nfs_refresh_inode_locked(inode
, fattr
);
1033 spin_unlock(&inode
->i_lock
);
1037 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1039 struct nfs_inode
*nfsi
= NFS_I(inode
);
1041 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1042 if (S_ISDIR(inode
->i_mode
))
1043 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1044 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1046 return nfs_refresh_inode_locked(inode
, fattr
);
1050 * nfs_post_op_update_inode - try to update the inode attribute cache
1051 * @inode - pointer to inode
1052 * @fattr - updated attributes
1054 * After an operation that has changed the inode metadata, mark the
1055 * attribute cache as being invalid, then try to update it.
1057 * NB: if the server didn't return any post op attributes, this
1058 * function will force the retrieval of attributes before the next
1059 * NFS request. Thus it should be used only for operations that
1060 * are expected to change one or more attributes, to avoid
1061 * unnecessary NFS requests and trips through nfs_update_inode().
1063 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1067 spin_lock(&inode
->i_lock
);
1068 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1069 spin_unlock(&inode
->i_lock
);
1074 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1075 * @inode - pointer to inode
1076 * @fattr - updated attributes
1078 * After an operation that has changed the inode metadata, mark the
1079 * attribute cache as being invalid, then try to update it. Fake up
1080 * weak cache consistency data, if none exist.
1082 * This function is mainly designed to be used by the ->write_done() functions.
1084 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1088 spin_lock(&inode
->i_lock
);
1089 /* Don't do a WCC update if these attributes are already stale */
1090 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1091 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1092 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1093 | NFS_ATTR_FATTR_PRESIZE
1094 | NFS_ATTR_FATTR_PREMTIME
1095 | NFS_ATTR_FATTR_PRECTIME
);
1098 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1099 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1100 fattr
->pre_change_attr
= NFS_I(inode
)->change_attr
;
1101 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1103 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1104 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1105 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1106 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1108 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1109 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1110 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1111 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1113 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1114 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1115 fattr
->pre_size
= i_size_read(inode
);
1116 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1119 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1120 spin_unlock(&inode
->i_lock
);
1125 * Many nfs protocol calls return the new file attributes after
1126 * an operation. Here we update the inode to reflect the state
1127 * of the server's inode.
1129 * This is a bit tricky because we have to make sure all dirty pages
1130 * have been sent off to the server before calling invalidate_inode_pages.
1131 * To make sure no other process adds more write requests while we try
1132 * our best to flush them, we make them sleep during the attribute refresh.
1134 * A very similar scenario holds for the dir cache.
1136 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1138 struct nfs_server
*server
;
1139 struct nfs_inode
*nfsi
= NFS_I(inode
);
1140 loff_t cur_isize
, new_isize
;
1141 unsigned long invalid
= 0;
1142 unsigned long now
= jiffies
;
1144 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1145 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1146 atomic_read(&inode
->i_count
), fattr
->valid
);
1148 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1152 * Make sure the inode's type hasn't changed.
1154 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1157 server
= NFS_SERVER(inode
);
1158 /* Update the fsid? */
1159 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1160 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1161 !test_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
))
1162 server
->fsid
= fattr
->fsid
;
1165 * Update the read time so we don't revalidate too often.
1167 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1169 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) || (fattr
->valid
& (NFS_ATTR_FATTR_MTIME
|NFS_ATTR_FATTR_CTIME
)))
1170 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1171 | NFS_INO_INVALID_ATIME
1172 | NFS_INO_REVAL_PAGECACHE
);
1174 /* Do atomic weak cache consistency updates */
1175 nfs_wcc_update_inode(inode
, fattr
);
1177 /* More cache consistency checks */
1178 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1179 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1180 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1181 inode
->i_sb
->s_id
, inode
->i_ino
);
1182 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1183 if (S_ISDIR(inode
->i_mode
))
1184 nfs_force_lookup_revalidate(inode
);
1185 nfsi
->change_attr
= fattr
->change_attr
;
1189 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1190 /* NFSv2/v3: Check if the mtime agrees */
1191 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1192 dprintk("NFS: mtime change on server for file %s/%ld\n",
1193 inode
->i_sb
->s_id
, inode
->i_ino
);
1194 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1195 if (S_ISDIR(inode
->i_mode
))
1196 nfs_force_lookup_revalidate(inode
);
1197 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1200 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1201 /* If ctime has changed we should definitely clear access+acl caches */
1202 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1203 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1204 /* and probably clear data for a directory too as utimes can cause
1205 * havoc with our cache.
1207 if (S_ISDIR(inode
->i_mode
)) {
1208 invalid
|= NFS_INO_INVALID_DATA
;
1209 nfs_force_lookup_revalidate(inode
);
1211 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1215 /* Check if our cached file size is stale */
1216 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1217 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1218 cur_isize
= i_size_read(inode
);
1219 if (new_isize
!= cur_isize
) {
1220 /* Do we perhaps have any outstanding writes, or has
1221 * the file grown beyond our last write? */
1222 if (nfsi
->npages
== 0 || new_isize
> cur_isize
) {
1223 i_size_write(inode
, new_isize
);
1224 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1226 dprintk("NFS: isize change on server for file %s/%ld\n",
1227 inode
->i_sb
->s_id
, inode
->i_ino
);
1232 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1233 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1235 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1236 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1237 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1238 inode
->i_mode
= fattr
->mode
;
1241 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1242 if (inode
->i_uid
!= fattr
->uid
) {
1243 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1244 inode
->i_uid
= fattr
->uid
;
1247 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1248 if (inode
->i_gid
!= fattr
->gid
) {
1249 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1250 inode
->i_gid
= fattr
->gid
;
1254 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1255 if (inode
->i_nlink
!= fattr
->nlink
) {
1256 invalid
|= NFS_INO_INVALID_ATTR
;
1257 if (S_ISDIR(inode
->i_mode
))
1258 invalid
|= NFS_INO_INVALID_DATA
;
1259 inode
->i_nlink
= fattr
->nlink
;
1263 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1265 * report the blocks in 512byte units
1267 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1269 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1270 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1272 /* Update attrtimeo value if we're out of the unstable period */
1273 if (invalid
& NFS_INO_INVALID_ATTR
) {
1274 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1275 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1276 nfsi
->attrtimeo_timestamp
= now
;
1277 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1279 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1280 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1281 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1282 nfsi
->attrtimeo_timestamp
= now
;
1285 invalid
&= ~NFS_INO_INVALID_ATTR
;
1286 /* Don't invalidate the data if we were to blame */
1287 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1288 || S_ISLNK(inode
->i_mode
)))
1289 invalid
&= ~NFS_INO_INVALID_DATA
;
1290 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1291 (nfsi
->cache_validity
& NFS_INO_REVAL_FORCED
))
1292 nfsi
->cache_validity
|= invalid
;
1293 nfsi
->cache_validity
&= ~NFS_INO_REVAL_FORCED
;
1298 * Big trouble! The inode has become a different object.
1300 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1301 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1304 * No need to worry about unhashing the dentry, as the
1305 * lookup validation will know that the inode is bad.
1306 * (But we fall through to invalidate the caches.)
1308 nfs_invalidate_inode(inode
);
1312 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1313 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1314 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1315 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1320 #ifdef CONFIG_NFS_V4
1323 * Clean out any remaining NFSv4 state that might be left over due
1324 * to open() calls that passed nfs_atomic_lookup, but failed to call
1327 void nfs4_clear_inode(struct inode
*inode
)
1329 /* If we are holding a delegation, return it! */
1330 nfs_inode_return_delegation_noreclaim(inode
);
1331 /* First call standard NFS clear_inode() code */
1332 nfs_clear_inode(inode
);
1336 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1338 struct nfs_inode
*nfsi
;
1339 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1343 nfsi
->cache_validity
= 0UL;
1344 #ifdef CONFIG_NFS_V3_ACL
1345 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1346 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1348 #ifdef CONFIG_NFS_V4
1349 nfsi
->nfs4_acl
= NULL
;
1350 #endif /* CONFIG_NFS_V4 */
1351 return &nfsi
->vfs_inode
;
1354 void nfs_destroy_inode(struct inode
*inode
)
1356 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1359 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1361 #ifdef CONFIG_NFS_V4
1362 INIT_LIST_HEAD(&nfsi
->open_states
);
1363 nfsi
->delegation
= NULL
;
1364 nfsi
->delegation_state
= 0;
1365 init_rwsem(&nfsi
->rwsem
);
1369 static void init_once(void *foo
)
1371 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1373 inode_init_once(&nfsi
->vfs_inode
);
1374 INIT_LIST_HEAD(&nfsi
->open_files
);
1375 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1376 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1377 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1379 atomic_set(&nfsi
->silly_count
, 1);
1380 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1381 init_waitqueue_head(&nfsi
->waitqueue
);
1382 nfs4_init_once(nfsi
);
1385 static int __init
nfs_init_inodecache(void)
1387 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1388 sizeof(struct nfs_inode
),
1389 0, (SLAB_RECLAIM_ACCOUNT
|
1392 if (nfs_inode_cachep
== NULL
)
1398 static void nfs_destroy_inodecache(void)
1400 kmem_cache_destroy(nfs_inode_cachep
);
1403 struct workqueue_struct
*nfsiod_workqueue
;
1406 * start up the nfsiod workqueue
1408 static int nfsiod_start(void)
1410 struct workqueue_struct
*wq
;
1411 dprintk("RPC: creating workqueue nfsiod\n");
1412 wq
= create_singlethread_workqueue("nfsiod");
1415 nfsiod_workqueue
= wq
;
1420 * Destroy the nfsiod workqueue
1422 static void nfsiod_stop(void)
1424 struct workqueue_struct
*wq
;
1426 wq
= nfsiod_workqueue
;
1429 nfsiod_workqueue
= NULL
;
1430 destroy_workqueue(wq
);
1436 static int __init
init_nfs_fs(void)
1440 err
= nfs_fscache_register();
1444 err
= nfsiod_start();
1448 err
= nfs_fs_proc_init();
1452 err
= nfs_init_nfspagecache();
1456 err
= nfs_init_inodecache();
1460 err
= nfs_init_readpagecache();
1464 err
= nfs_init_writepagecache();
1468 err
= nfs_init_directcache();
1472 #ifdef CONFIG_PROC_FS
1473 rpc_proc_register(&nfs_rpcstat
);
1475 if ((err
= register_nfs_fs()) != 0)
1479 #ifdef CONFIG_PROC_FS
1480 rpc_proc_unregister("nfs");
1482 nfs_destroy_directcache();
1484 nfs_destroy_writepagecache();
1486 nfs_destroy_readpagecache();
1488 nfs_destroy_inodecache();
1490 nfs_destroy_nfspagecache();
1496 nfs_fscache_unregister();
1501 static void __exit
exit_nfs_fs(void)
1503 nfs_destroy_directcache();
1504 nfs_destroy_writepagecache();
1505 nfs_destroy_readpagecache();
1506 nfs_destroy_inodecache();
1507 nfs_destroy_nfspagecache();
1508 nfs_fscache_unregister();
1509 #ifdef CONFIG_PROC_FS
1510 rpc_proc_unregister("nfs");
1512 unregister_nfs_fs();
1517 /* Not quite true; I just maintain it */
1518 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1519 MODULE_LICENSE("GPL");
1520 module_param(enable_ino64
, bool, 0644);
1522 module_init(init_nfs_fs
)
1523 module_exit(exit_nfs_fs
)