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_wait_bit_killable - helper for functions that are sleeping on bit locks
70 * @word: long word containing the bit lock
72 int nfs_wait_bit_killable(void *word
)
74 if (fatal_signal_pending(current
))
81 * nfs_compat_user_ino64 - returns the user-visible inode number
82 * @fileid: 64-bit fileid
84 * This function returns a 32-bit inode number if the boot parameter
85 * nfs.enable_ino64 is zero.
87 u64
nfs_compat_user_ino64(u64 fileid
)
94 if (sizeof(ino
) < sizeof(fileid
))
95 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
99 int nfs_write_inode(struct inode
*inode
, int sync
)
104 ret
= filemap_fdatawait(inode
->i_mapping
);
106 ret
= nfs_commit_inode(inode
, FLUSH_SYNC
);
108 ret
= nfs_commit_inode(inode
, 0);
111 __mark_inode_dirty(inode
, I_DIRTY_DATASYNC
);
115 void nfs_clear_inode(struct inode
*inode
)
118 * The following should never happen...
120 BUG_ON(nfs_have_writebacks(inode
));
121 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
122 nfs_zap_acl_cache(inode
);
123 nfs_access_zap_cache(inode
);
127 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
129 int nfs_sync_mapping(struct address_space
*mapping
)
133 if (mapping
->nrpages
== 0)
135 unmap_mapping_range(mapping
, 0, 0, 0);
136 ret
= filemap_write_and_wait(mapping
);
139 ret
= nfs_wb_all(mapping
->host
);
145 * Invalidate the local caches
147 static void nfs_zap_caches_locked(struct inode
*inode
)
149 struct nfs_inode
*nfsi
= NFS_I(inode
);
150 int mode
= inode
->i_mode
;
152 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
154 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
155 nfsi
->attrtimeo_timestamp
= jiffies
;
157 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
158 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
159 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
161 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
164 void nfs_zap_caches(struct inode
*inode
)
166 spin_lock(&inode
->i_lock
);
167 nfs_zap_caches_locked(inode
);
168 spin_unlock(&inode
->i_lock
);
171 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
173 if (mapping
->nrpages
!= 0) {
174 spin_lock(&inode
->i_lock
);
175 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_DATA
;
176 spin_unlock(&inode
->i_lock
);
180 void nfs_zap_acl_cache(struct inode
*inode
)
182 void (*clear_acl_cache
)(struct inode
*);
184 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
185 if (clear_acl_cache
!= NULL
)
186 clear_acl_cache(inode
);
187 spin_lock(&inode
->i_lock
);
188 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
189 spin_unlock(&inode
->i_lock
);
192 void nfs_invalidate_atime(struct inode
*inode
)
194 spin_lock(&inode
->i_lock
);
195 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
196 spin_unlock(&inode
->i_lock
);
200 * Invalidate, but do not unhash, the inode.
201 * NB: must be called with inode->i_lock held!
203 static void nfs_invalidate_inode(struct inode
*inode
)
205 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
206 nfs_zap_caches_locked(inode
);
209 struct nfs_find_desc
{
211 struct nfs_fattr
*fattr
;
215 * In NFSv3 we can have 64bit inode numbers. In order to support
216 * this, and re-exported directories (also seen in NFSv2)
217 * we are forced to allow 2 different inodes to have the same
221 nfs_find_actor(struct inode
*inode
, void *opaque
)
223 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
224 struct nfs_fh
*fh
= desc
->fh
;
225 struct nfs_fattr
*fattr
= desc
->fattr
;
227 if (NFS_FILEID(inode
) != fattr
->fileid
)
229 if (nfs_compare_fh(NFS_FH(inode
), fh
))
231 if (is_bad_inode(inode
) || NFS_STALE(inode
))
237 nfs_init_locked(struct inode
*inode
, void *opaque
)
239 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
240 struct nfs_fattr
*fattr
= desc
->fattr
;
242 set_nfs_fileid(inode
, fattr
->fileid
);
243 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
247 /* Don't use READDIRPLUS on directories that we believe are too large */
248 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
251 * This is our front-end to iget that looks up inodes by file handle
252 * instead of inode number.
255 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
257 struct nfs_find_desc desc
= {
261 struct inode
*inode
= ERR_PTR(-ENOENT
);
264 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
266 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
269 hash
= nfs_fattr_to_ino_t(fattr
);
271 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
273 inode
= ERR_PTR(-ENOMEM
);
277 if (inode
->i_state
& I_NEW
) {
278 struct nfs_inode
*nfsi
= NFS_I(inode
);
279 unsigned long now
= jiffies
;
281 /* We set i_ino for the few things that still rely on it,
285 /* We can't support update_atime(), since the server will reset it */
286 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
287 inode
->i_mode
= fattr
->mode
;
288 /* Why so? Because we want revalidate for devices/FIFOs, and
289 * that's precisely what we have in nfs_file_inode_operations.
291 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
292 if (S_ISREG(inode
->i_mode
)) {
293 inode
->i_fop
= &nfs_file_operations
;
294 inode
->i_data
.a_ops
= &nfs_file_aops
;
295 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
296 } else if (S_ISDIR(inode
->i_mode
)) {
297 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
298 inode
->i_fop
= &nfs_dir_operations
;
299 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
300 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
301 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
302 /* Deal with crossing mountpoints */
303 if ((fattr
->valid
& NFS_ATTR_FATTR_FSID
)
304 && !nfs_fsid_equal(&NFS_SB(sb
)->fsid
, &fattr
->fsid
)) {
305 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
306 inode
->i_op
= &nfs_referral_inode_operations
;
308 inode
->i_op
= &nfs_mountpoint_inode_operations
;
310 set_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
);
312 } else if (S_ISLNK(inode
->i_mode
))
313 inode
->i_op
= &nfs_symlink_inode_operations
;
315 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
317 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
318 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
319 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
320 nfsi
->change_attr
= 0;
326 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
328 nfsi
->read_cache_jiffies
= fattr
->time_start
;
329 nfsi
->attr_gencount
= fattr
->gencount
;
330 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
331 inode
->i_atime
= fattr
->atime
;
332 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
333 inode
->i_mtime
= fattr
->mtime
;
334 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
335 inode
->i_ctime
= fattr
->ctime
;
336 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
337 nfsi
->change_attr
= fattr
->change_attr
;
338 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
339 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
340 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
341 inode
->i_nlink
= fattr
->nlink
;
342 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
343 inode
->i_uid
= fattr
->uid
;
344 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
345 inode
->i_gid
= fattr
->gid
;
346 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
347 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
348 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
350 * report the blocks in 512byte units
352 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
354 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
355 nfsi
->attrtimeo_timestamp
= now
;
356 nfsi
->access_cache
= RB_ROOT
;
358 unlock_new_inode(inode
);
360 nfs_refresh_inode(inode
, fattr
);
361 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
363 (long long)NFS_FILEID(inode
),
364 atomic_read(&inode
->i_count
));
370 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
374 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
377 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
379 struct inode
*inode
= dentry
->d_inode
;
380 struct nfs_fattr fattr
;
383 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
385 /* skip mode change if it's just for clearing setuid/setgid */
386 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
387 attr
->ia_valid
&= ~ATTR_MODE
;
389 if (attr
->ia_valid
& ATTR_SIZE
) {
390 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
391 attr
->ia_valid
&= ~ATTR_SIZE
;
394 /* Optimization: if the end result is no change, don't RPC */
395 attr
->ia_valid
&= NFS_VALID_ATTRS
;
396 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
399 /* Write all dirty data */
400 if (S_ISREG(inode
->i_mode
)) {
401 filemap_write_and_wait(inode
->i_mapping
);
405 * Return any delegations if we're going to change ACLs
407 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
408 nfs_inode_return_delegation(inode
);
409 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
411 nfs_refresh_inode(inode
, &fattr
);
416 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
417 * @inode: inode of the file used
418 * @offset: file offset to start truncating
420 * This is a copy of the common vmtruncate, but with the locking
421 * corrected to take into account the fact that NFS requires
422 * inode->i_size to be updated under the inode->i_lock.
424 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
426 if (i_size_read(inode
) < offset
) {
429 limit
= current
->signal
->rlim
[RLIMIT_FSIZE
].rlim_cur
;
430 if (limit
!= RLIM_INFINITY
&& offset
> limit
)
432 if (offset
> inode
->i_sb
->s_maxbytes
)
434 spin_lock(&inode
->i_lock
);
435 i_size_write(inode
, offset
);
436 spin_unlock(&inode
->i_lock
);
438 struct address_space
*mapping
= inode
->i_mapping
;
441 * truncation of in-use swapfiles is disallowed - it would
442 * cause subsequent swapout to scribble on the now-freed
445 if (IS_SWAPFILE(inode
))
447 spin_lock(&inode
->i_lock
);
448 i_size_write(inode
, offset
);
449 spin_unlock(&inode
->i_lock
);
452 * unmap_mapping_range is called twice, first simply for
453 * efficiency so that truncate_inode_pages does fewer
454 * single-page unmaps. However after this first call, and
455 * before truncate_inode_pages finishes, it is possible for
456 * private pages to be COWed, which remain after
457 * truncate_inode_pages finishes, hence the second
458 * unmap_mapping_range call must be made for correctness.
460 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
461 truncate_inode_pages(mapping
, offset
);
462 unmap_mapping_range(mapping
, offset
+ PAGE_SIZE
- 1, 0, 1);
466 send_sig(SIGXFSZ
, current
, 0);
472 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
473 * @inode: pointer to struct inode
474 * @attr: pointer to struct iattr
476 * Note: we do this in the *proc.c in order to ensure that
477 * it works for things like exclusive creates too.
479 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
481 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
482 spin_lock(&inode
->i_lock
);
483 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
484 int mode
= attr
->ia_mode
& S_IALLUGO
;
485 mode
|= inode
->i_mode
& ~S_IALLUGO
;
486 inode
->i_mode
= mode
;
488 if ((attr
->ia_valid
& ATTR_UID
) != 0)
489 inode
->i_uid
= attr
->ia_uid
;
490 if ((attr
->ia_valid
& ATTR_GID
) != 0)
491 inode
->i_gid
= attr
->ia_gid
;
492 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
493 spin_unlock(&inode
->i_lock
);
495 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
496 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
497 nfs_vmtruncate(inode
, attr
->ia_size
);
501 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
503 struct inode
*inode
= dentry
->d_inode
;
504 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
508 * Flush out writes to the server in order to update c/mtime.
510 * Hold the i_mutex to suspend application writes temporarily;
511 * this prevents long-running writing applications from blocking
514 if (S_ISREG(inode
->i_mode
)) {
515 mutex_lock(&inode
->i_mutex
);
516 nfs_wb_nocommit(inode
);
517 mutex_unlock(&inode
->i_mutex
);
521 * We may force a getattr if the user cares about atime.
523 * Note that we only have to check the vfsmount flags here:
524 * - NFS always sets S_NOATIME by so checking it would give a
526 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
527 * no point in checking those.
529 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
530 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
534 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
536 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
538 generic_fillattr(inode
, stat
);
539 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
545 * nfs_close_context - Common close_context() routine NFSv2/v3
546 * @ctx: pointer to context
547 * @is_sync: is this a synchronous close
549 * always ensure that the attributes are up to date if we're mounted
550 * with close-to-open semantics
552 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
555 struct nfs_server
*server
;
557 if (!(ctx
->mode
& FMODE_WRITE
))
561 inode
= ctx
->path
.dentry
->d_inode
;
562 if (!list_empty(&NFS_I(inode
)->open_files
))
564 server
= NFS_SERVER(inode
);
565 if (server
->flags
& NFS_MOUNT_NOCTO
)
567 nfs_revalidate_inode(server
, inode
);
570 static struct nfs_open_context
*alloc_nfs_open_context(struct vfsmount
*mnt
, struct dentry
*dentry
, struct rpc_cred
*cred
)
572 struct nfs_open_context
*ctx
;
574 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
576 ctx
->path
.dentry
= dget(dentry
);
577 ctx
->path
.mnt
= mntget(mnt
);
578 ctx
->cred
= get_rpccred(cred
);
580 ctx
->lockowner
= current
->files
;
584 atomic_set(&ctx
->count
, 1);
589 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
592 atomic_inc(&ctx
->count
);
596 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
598 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
600 if (!atomic_dec_and_lock(&ctx
->count
, &inode
->i_lock
))
602 list_del(&ctx
->list
);
603 spin_unlock(&inode
->i_lock
);
604 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
605 if (ctx
->cred
!= NULL
)
606 put_rpccred(ctx
->cred
);
607 path_put(&ctx
->path
);
611 void put_nfs_open_context(struct nfs_open_context
*ctx
)
613 __put_nfs_open_context(ctx
, 0);
616 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
618 __put_nfs_open_context(ctx
, 1);
622 * Ensure that mmap has a recent RPC credential for use when writing out
625 static void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
627 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
628 struct nfs_inode
*nfsi
= NFS_I(inode
);
630 filp
->private_data
= get_nfs_open_context(ctx
);
631 spin_lock(&inode
->i_lock
);
632 list_add(&ctx
->list
, &nfsi
->open_files
);
633 spin_unlock(&inode
->i_lock
);
637 * Given an inode, search for an open context with the desired characteristics
639 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
641 struct nfs_inode
*nfsi
= NFS_I(inode
);
642 struct nfs_open_context
*pos
, *ctx
= NULL
;
644 spin_lock(&inode
->i_lock
);
645 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
646 if (cred
!= NULL
&& pos
->cred
!= cred
)
648 if ((pos
->mode
& mode
) == mode
) {
649 ctx
= get_nfs_open_context(pos
);
653 spin_unlock(&inode
->i_lock
);
657 static void nfs_file_clear_open_context(struct file
*filp
)
659 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
660 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
663 filp
->private_data
= NULL
;
664 spin_lock(&inode
->i_lock
);
665 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
666 spin_unlock(&inode
->i_lock
);
667 put_nfs_open_context_sync(ctx
);
672 * These allocate and release file read/write context information.
674 int nfs_open(struct inode
*inode
, struct file
*filp
)
676 struct nfs_open_context
*ctx
;
677 struct rpc_cred
*cred
;
679 cred
= rpc_lookup_cred();
681 return PTR_ERR(cred
);
682 ctx
= alloc_nfs_open_context(filp
->f_path
.mnt
, filp
->f_path
.dentry
, cred
);
686 ctx
->mode
= filp
->f_mode
;
687 nfs_file_set_open_context(filp
, ctx
);
688 put_nfs_open_context(ctx
);
692 int nfs_release(struct inode
*inode
, struct file
*filp
)
694 nfs_file_clear_open_context(filp
);
699 * This function is called whenever some part of NFS notices that
700 * the cached attributes have to be refreshed.
703 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
705 int status
= -ESTALE
;
706 struct nfs_fattr fattr
;
707 struct nfs_inode
*nfsi
= NFS_I(inode
);
709 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
710 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
712 if (is_bad_inode(inode
))
714 if (NFS_STALE(inode
))
717 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
718 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
720 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
722 (long long)NFS_FILEID(inode
), status
);
723 if (status
== -ESTALE
) {
724 nfs_zap_caches(inode
);
725 if (!S_ISDIR(inode
->i_mode
))
726 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
731 status
= nfs_refresh_inode(inode
, &fattr
);
733 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
735 (long long)NFS_FILEID(inode
), status
);
739 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
740 nfs_zap_acl_cache(inode
);
742 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
744 (long long)NFS_FILEID(inode
));
750 int nfs_attribute_timeout(struct inode
*inode
)
752 struct nfs_inode
*nfsi
= NFS_I(inode
);
754 if (nfs_have_delegation(inode
, FMODE_READ
))
756 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
760 * nfs_revalidate_inode - Revalidate the inode attributes
761 * @server - pointer to nfs_server struct
762 * @inode - pointer to inode struct
764 * Updates inode attribute information by retrieving the data from the server.
766 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
768 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
769 && !nfs_attribute_timeout(inode
))
770 return NFS_STALE(inode
) ? -ESTALE
: 0;
771 return __nfs_revalidate_inode(server
, inode
);
774 static int nfs_invalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
776 struct nfs_inode
*nfsi
= NFS_I(inode
);
778 if (mapping
->nrpages
!= 0) {
779 int ret
= invalidate_inode_pages2(mapping
);
783 spin_lock(&inode
->i_lock
);
784 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
785 if (S_ISDIR(inode
->i_mode
))
786 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
787 spin_unlock(&inode
->i_lock
);
788 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
789 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
790 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
794 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
798 mutex_lock(&inode
->i_mutex
);
799 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_DATA
) {
800 ret
= nfs_sync_mapping(mapping
);
802 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
804 mutex_unlock(&inode
->i_mutex
);
809 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
810 * @inode - pointer to host inode
811 * @mapping - pointer to mapping
813 int nfs_revalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
815 struct nfs_inode
*nfsi
= NFS_I(inode
);
818 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
819 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
820 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
824 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
825 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
831 * nfs_revalidate_mapping - Revalidate the pagecache
832 * @inode - pointer to host inode
833 * @mapping - pointer to mapping
835 * This version of the function will take the inode->i_mutex and attempt to
836 * flush out all dirty data if it needs to invalidate the page cache.
838 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
840 struct nfs_inode
*nfsi
= NFS_I(inode
);
843 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
844 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
845 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
849 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
850 ret
= nfs_invalidate_mapping(inode
, mapping
);
855 static void nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
857 struct nfs_inode
*nfsi
= NFS_I(inode
);
859 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
860 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
861 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
862 nfsi
->change_attr
= fattr
->change_attr
;
863 if (S_ISDIR(inode
->i_mode
))
864 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
866 /* If we have atomic WCC data, we may update some attributes */
867 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
868 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
869 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
870 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
872 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
873 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
874 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
875 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
876 if (S_ISDIR(inode
->i_mode
))
877 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
879 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
880 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
881 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
882 && nfsi
->npages
== 0)
883 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
887 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
888 * @inode - pointer to inode
889 * @fattr - updated attributes
891 * Verifies the attribute cache. If we have just changed the attributes,
892 * so that fattr carries weak cache consistency data, then it may
893 * also update the ctime/mtime/change_attribute.
895 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
897 struct nfs_inode
*nfsi
= NFS_I(inode
);
898 loff_t cur_size
, new_isize
;
899 unsigned long invalid
= 0;
902 /* Has the inode gone and changed behind our back? */
903 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
905 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
908 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
909 nfsi
->change_attr
!= fattr
->change_attr
)
910 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
912 /* Verify a few of the more important attributes */
913 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
914 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
916 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
917 cur_size
= i_size_read(inode
);
918 new_isize
= nfs_size_to_loff_t(fattr
->size
);
919 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
920 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
923 /* Have any file permissions changed? */
924 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
925 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
926 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
927 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
928 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
929 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
931 /* Has the link count changed? */
932 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
933 invalid
|= NFS_INO_INVALID_ATTR
;
935 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
936 invalid
|= NFS_INO_INVALID_ATIME
;
939 nfsi
->cache_validity
|= invalid
;
941 nfsi
->read_cache_jiffies
= fattr
->time_start
;
945 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
947 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
949 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
952 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
954 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
956 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
959 static atomic_long_t nfs_attr_generation_counter
;
961 static unsigned long nfs_read_attr_generation_counter(void)
963 return atomic_long_read(&nfs_attr_generation_counter
);
966 unsigned long nfs_inc_attr_generation_counter(void)
968 return atomic_long_inc_return(&nfs_attr_generation_counter
);
971 void nfs_fattr_init(struct nfs_fattr
*fattr
)
974 fattr
->time_start
= jiffies
;
975 fattr
->gencount
= nfs_inc_attr_generation_counter();
979 * nfs_inode_attrs_need_update - check if the inode attributes need updating
980 * @inode - pointer to inode
981 * @fattr - attributes
983 * Attempt to divine whether or not an RPC call reply carrying stale
984 * attributes got scheduled after another call carrying updated ones.
986 * To do so, the function first assumes that a more recent ctime means
987 * that the attributes in fattr are newer, however it also attempt to
988 * catch the case where ctime either didn't change, or went backwards
989 * (if someone reset the clock on the server) by looking at whether
990 * or not this RPC call was started after the inode was last updated.
991 * Note also the check for wraparound of 'attr_gencount'
993 * The function returns 'true' if it thinks the attributes in 'fattr' are
994 * more recent than the ones cached in the inode.
997 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
999 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1001 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1002 nfs_ctime_need_update(inode
, fattr
) ||
1003 nfs_size_need_update(inode
, fattr
) ||
1004 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1007 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1009 if (nfs_inode_attrs_need_update(inode
, fattr
))
1010 return nfs_update_inode(inode
, fattr
);
1011 return nfs_check_inode_attributes(inode
, fattr
);
1015 * nfs_refresh_inode - try to update the inode attribute cache
1016 * @inode - pointer to inode
1017 * @fattr - updated attributes
1019 * Check that an RPC call that returned attributes has not overlapped with
1020 * other recent updates of the inode metadata, then decide whether it is
1021 * safe to do a full update of the inode attributes, or whether just to
1022 * call nfs_check_inode_attributes.
1024 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1028 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1030 spin_lock(&inode
->i_lock
);
1031 status
= nfs_refresh_inode_locked(inode
, fattr
);
1032 spin_unlock(&inode
->i_lock
);
1036 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1038 struct nfs_inode
*nfsi
= NFS_I(inode
);
1040 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1041 if (S_ISDIR(inode
->i_mode
))
1042 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1043 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1045 return nfs_refresh_inode_locked(inode
, fattr
);
1049 * nfs_post_op_update_inode - try to update the inode attribute cache
1050 * @inode - pointer to inode
1051 * @fattr - updated attributes
1053 * After an operation that has changed the inode metadata, mark the
1054 * attribute cache as being invalid, then try to update it.
1056 * NB: if the server didn't return any post op attributes, this
1057 * function will force the retrieval of attributes before the next
1058 * NFS request. Thus it should be used only for operations that
1059 * are expected to change one or more attributes, to avoid
1060 * unnecessary NFS requests and trips through nfs_update_inode().
1062 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1066 spin_lock(&inode
->i_lock
);
1067 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1068 spin_unlock(&inode
->i_lock
);
1073 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1074 * @inode - pointer to inode
1075 * @fattr - updated attributes
1077 * After an operation that has changed the inode metadata, mark the
1078 * attribute cache as being invalid, then try to update it. Fake up
1079 * weak cache consistency data, if none exist.
1081 * This function is mainly designed to be used by the ->write_done() functions.
1083 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1087 spin_lock(&inode
->i_lock
);
1088 /* Don't do a WCC update if these attributes are already stale */
1089 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1090 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1091 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1092 | NFS_ATTR_FATTR_PRESIZE
1093 | NFS_ATTR_FATTR_PREMTIME
1094 | NFS_ATTR_FATTR_PRECTIME
);
1097 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1098 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1099 fattr
->pre_change_attr
= NFS_I(inode
)->change_attr
;
1100 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1102 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1103 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1104 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1105 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1107 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1108 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1109 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1110 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1112 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1113 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1114 fattr
->pre_size
= i_size_read(inode
);
1115 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1118 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1119 spin_unlock(&inode
->i_lock
);
1124 * Many nfs protocol calls return the new file attributes after
1125 * an operation. Here we update the inode to reflect the state
1126 * of the server's inode.
1128 * This is a bit tricky because we have to make sure all dirty pages
1129 * have been sent off to the server before calling invalidate_inode_pages.
1130 * To make sure no other process adds more write requests while we try
1131 * our best to flush them, we make them sleep during the attribute refresh.
1133 * A very similar scenario holds for the dir cache.
1135 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1137 struct nfs_server
*server
;
1138 struct nfs_inode
*nfsi
= NFS_I(inode
);
1139 loff_t cur_isize
, new_isize
;
1140 unsigned long invalid
= 0;
1141 unsigned long now
= jiffies
;
1143 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1144 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1145 atomic_read(&inode
->i_count
), fattr
->valid
);
1147 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1151 * Make sure the inode's type hasn't changed.
1153 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1156 server
= NFS_SERVER(inode
);
1157 /* Update the fsid? */
1158 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1159 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1160 !test_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
))
1161 server
->fsid
= fattr
->fsid
;
1164 * Update the read time so we don't revalidate too often.
1166 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1168 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) || (fattr
->valid
& (NFS_ATTR_FATTR_MTIME
|NFS_ATTR_FATTR_CTIME
)))
1169 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1170 | NFS_INO_INVALID_ATIME
1171 | NFS_INO_REVAL_PAGECACHE
);
1173 /* Do atomic weak cache consistency updates */
1174 nfs_wcc_update_inode(inode
, fattr
);
1176 /* More cache consistency checks */
1177 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1178 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1179 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1180 inode
->i_sb
->s_id
, inode
->i_ino
);
1181 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1182 if (S_ISDIR(inode
->i_mode
))
1183 nfs_force_lookup_revalidate(inode
);
1184 nfsi
->change_attr
= fattr
->change_attr
;
1188 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1189 /* NFSv2/v3: Check if the mtime agrees */
1190 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1191 dprintk("NFS: mtime change on server for file %s/%ld\n",
1192 inode
->i_sb
->s_id
, inode
->i_ino
);
1193 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1194 if (S_ISDIR(inode
->i_mode
))
1195 nfs_force_lookup_revalidate(inode
);
1196 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1199 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1200 /* If ctime has changed we should definitely clear access+acl caches */
1201 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1202 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1203 /* and probably clear data for a directory too as utimes can cause
1204 * havoc with our cache.
1206 if (S_ISDIR(inode
->i_mode
)) {
1207 invalid
|= NFS_INO_INVALID_DATA
;
1208 nfs_force_lookup_revalidate(inode
);
1210 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1214 /* Check if our cached file size is stale */
1215 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1216 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1217 cur_isize
= i_size_read(inode
);
1218 if (new_isize
!= cur_isize
) {
1219 /* Do we perhaps have any outstanding writes, or has
1220 * the file grown beyond our last write? */
1221 if (nfsi
->npages
== 0 || new_isize
> cur_isize
) {
1222 i_size_write(inode
, new_isize
);
1223 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1225 dprintk("NFS: isize change on server for file %s/%ld\n",
1226 inode
->i_sb
->s_id
, inode
->i_ino
);
1231 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1232 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1234 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1235 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1236 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1237 inode
->i_mode
= fattr
->mode
;
1240 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1241 if (inode
->i_uid
!= fattr
->uid
) {
1242 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1243 inode
->i_uid
= fattr
->uid
;
1246 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1247 if (inode
->i_gid
!= fattr
->gid
) {
1248 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1249 inode
->i_gid
= fattr
->gid
;
1253 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1254 if (inode
->i_nlink
!= fattr
->nlink
) {
1255 invalid
|= NFS_INO_INVALID_ATTR
;
1256 if (S_ISDIR(inode
->i_mode
))
1257 invalid
|= NFS_INO_INVALID_DATA
;
1258 inode
->i_nlink
= fattr
->nlink
;
1262 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1264 * report the blocks in 512byte units
1266 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1268 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1269 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1271 /* Update attrtimeo value if we're out of the unstable period */
1272 if (invalid
& NFS_INO_INVALID_ATTR
) {
1273 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1274 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1275 nfsi
->attrtimeo_timestamp
= now
;
1276 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1278 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1279 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1280 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1281 nfsi
->attrtimeo_timestamp
= now
;
1284 invalid
&= ~NFS_INO_INVALID_ATTR
;
1285 /* Don't invalidate the data if we were to blame */
1286 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1287 || S_ISLNK(inode
->i_mode
)))
1288 invalid
&= ~NFS_INO_INVALID_DATA
;
1289 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1290 (nfsi
->cache_validity
& NFS_INO_REVAL_FORCED
))
1291 nfsi
->cache_validity
|= invalid
;
1292 nfsi
->cache_validity
&= ~NFS_INO_REVAL_FORCED
;
1297 * Big trouble! The inode has become a different object.
1299 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1300 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1303 * No need to worry about unhashing the dentry, as the
1304 * lookup validation will know that the inode is bad.
1305 * (But we fall through to invalidate the caches.)
1307 nfs_invalidate_inode(inode
);
1311 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1312 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1313 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1314 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1319 #ifdef CONFIG_NFS_V4
1322 * Clean out any remaining NFSv4 state that might be left over due
1323 * to open() calls that passed nfs_atomic_lookup, but failed to call
1326 void nfs4_clear_inode(struct inode
*inode
)
1328 /* If we are holding a delegation, return it! */
1329 nfs_inode_return_delegation_noreclaim(inode
);
1330 /* First call standard NFS clear_inode() code */
1331 nfs_clear_inode(inode
);
1335 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1337 struct nfs_inode
*nfsi
;
1338 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1342 nfsi
->cache_validity
= 0UL;
1343 #ifdef CONFIG_NFS_V3_ACL
1344 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1345 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1347 #ifdef CONFIG_NFS_V4
1348 nfsi
->nfs4_acl
= NULL
;
1349 #endif /* CONFIG_NFS_V4 */
1350 return &nfsi
->vfs_inode
;
1353 void nfs_destroy_inode(struct inode
*inode
)
1355 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1358 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1360 #ifdef CONFIG_NFS_V4
1361 INIT_LIST_HEAD(&nfsi
->open_states
);
1362 nfsi
->delegation
= NULL
;
1363 nfsi
->delegation_state
= 0;
1364 init_rwsem(&nfsi
->rwsem
);
1368 static void init_once(void *foo
)
1370 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1372 inode_init_once(&nfsi
->vfs_inode
);
1373 INIT_LIST_HEAD(&nfsi
->open_files
);
1374 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1375 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1376 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1378 atomic_set(&nfsi
->silly_count
, 1);
1379 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1380 init_waitqueue_head(&nfsi
->waitqueue
);
1381 nfs4_init_once(nfsi
);
1384 static int __init
nfs_init_inodecache(void)
1386 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1387 sizeof(struct nfs_inode
),
1388 0, (SLAB_RECLAIM_ACCOUNT
|
1391 if (nfs_inode_cachep
== NULL
)
1397 static void nfs_destroy_inodecache(void)
1399 kmem_cache_destroy(nfs_inode_cachep
);
1402 struct workqueue_struct
*nfsiod_workqueue
;
1405 * start up the nfsiod workqueue
1407 static int nfsiod_start(void)
1409 struct workqueue_struct
*wq
;
1410 dprintk("RPC: creating workqueue nfsiod\n");
1411 wq
= create_singlethread_workqueue("nfsiod");
1414 nfsiod_workqueue
= wq
;
1419 * Destroy the nfsiod workqueue
1421 static void nfsiod_stop(void)
1423 struct workqueue_struct
*wq
;
1425 wq
= nfsiod_workqueue
;
1428 nfsiod_workqueue
= NULL
;
1429 destroy_workqueue(wq
);
1435 static int __init
init_nfs_fs(void)
1439 err
= nfsiod_start();
1443 err
= nfs_fs_proc_init();
1447 err
= nfs_init_nfspagecache();
1451 err
= nfs_init_inodecache();
1455 err
= nfs_init_readpagecache();
1459 err
= nfs_init_writepagecache();
1463 err
= nfs_init_directcache();
1467 #ifdef CONFIG_PROC_FS
1468 rpc_proc_register(&nfs_rpcstat
);
1470 if ((err
= register_nfs_fs()) != 0)
1474 #ifdef CONFIG_PROC_FS
1475 rpc_proc_unregister("nfs");
1477 nfs_destroy_directcache();
1479 nfs_destroy_writepagecache();
1481 nfs_destroy_readpagecache();
1483 nfs_destroy_inodecache();
1485 nfs_destroy_nfspagecache();
1494 static void __exit
exit_nfs_fs(void)
1496 nfs_destroy_directcache();
1497 nfs_destroy_writepagecache();
1498 nfs_destroy_readpagecache();
1499 nfs_destroy_inodecache();
1500 nfs_destroy_nfspagecache();
1501 #ifdef CONFIG_PROC_FS
1502 rpc_proc_unregister("nfs");
1504 unregister_nfs_fs();
1509 /* Not quite true; I just maintain it */
1510 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1511 MODULE_LICENSE("GPL");
1512 module_param(enable_ino64
, bool, 0644);
1514 module_init(init_nfs_fs
)
1515 module_exit(exit_nfs_fs
)