4 * Copyright (C) 1992 Rick Sladkey
6 * nfs inode and superblock handling functions
8 * Modularised by Alan Cox <alan@lxorguk.ukuu.org.uk>, while hacking some
9 * experimental NFS changes. Modularisation taken straight from SYS5 fs.
11 * Change to nfs_read_super() to permit NFS mounts to multi-homed hosts.
12 * J.S.Peatfield@damtp.cam.ac.uk
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/sched.h>
19 #include <linux/time.h>
20 #include <linux/kernel.h>
22 #include <linux/string.h>
23 #include <linux/stat.h>
24 #include <linux/errno.h>
25 #include <linux/unistd.h>
26 #include <linux/sunrpc/clnt.h>
27 #include <linux/sunrpc/stats.h>
28 #include <linux/sunrpc/metrics.h>
29 #include <linux/nfs_fs.h>
30 #include <linux/nfs_mount.h>
31 #include <linux/nfs4_mount.h>
32 #include <linux/lockd/bind.h>
33 #include <linux/seq_file.h>
34 #include <linux/mount.h>
35 #include <linux/nfs_idmap.h>
36 #include <linux/vfs.h>
37 #include <linux/inet.h>
38 #include <linux/nfs_xdr.h>
40 #include <asm/system.h>
41 #include <asm/uaccess.h>
45 #include "delegation.h"
49 #include "dns_resolve.h"
51 #define NFSDBG_FACILITY NFSDBG_VFS
53 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
55 /* Default is to see 64-bit inode numbers */
56 static int enable_ino64
= NFS_64_BIT_INODE_NUMBERS_ENABLED
;
58 static void nfs_invalidate_inode(struct inode
*);
59 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
61 static struct kmem_cache
* nfs_inode_cachep
;
63 static inline unsigned long
64 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
66 return nfs_fileid_to_ino_t(fattr
->fileid
);
70 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
71 * @word: long word containing the bit lock
73 int nfs_wait_bit_killable(void *word
)
75 if (fatal_signal_pending(current
))
82 * nfs_compat_user_ino64 - returns the user-visible inode number
83 * @fileid: 64-bit fileid
85 * This function returns a 32-bit inode number if the boot parameter
86 * nfs.enable_ino64 is zero.
88 u64
nfs_compat_user_ino64(u64 fileid
)
95 if (sizeof(ino
) < sizeof(fileid
))
96 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
100 void nfs_clear_inode(struct inode
*inode
)
103 * The following should never happen...
105 BUG_ON(nfs_have_writebacks(inode
));
106 BUG_ON(!list_empty(&NFS_I(inode
)->open_files
));
107 nfs_zap_acl_cache(inode
);
108 nfs_access_zap_cache(inode
);
109 nfs_fscache_release_inode_cookie(inode
);
113 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
115 int nfs_sync_mapping(struct address_space
*mapping
)
119 if (mapping
->nrpages
== 0)
121 unmap_mapping_range(mapping
, 0, 0, 0);
122 ret
= filemap_write_and_wait(mapping
);
125 ret
= nfs_wb_all(mapping
->host
);
131 * Invalidate the local caches
133 static void nfs_zap_caches_locked(struct inode
*inode
)
135 struct nfs_inode
*nfsi
= NFS_I(inode
);
136 int mode
= inode
->i_mode
;
138 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
140 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
141 nfsi
->attrtimeo_timestamp
= jiffies
;
143 memset(NFS_COOKIEVERF(inode
), 0, sizeof(NFS_COOKIEVERF(inode
)));
144 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
))
145 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
147 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
|NFS_INO_REVAL_PAGECACHE
;
150 void nfs_zap_caches(struct inode
*inode
)
152 spin_lock(&inode
->i_lock
);
153 nfs_zap_caches_locked(inode
);
154 spin_unlock(&inode
->i_lock
);
157 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
159 if (mapping
->nrpages
!= 0) {
160 spin_lock(&inode
->i_lock
);
161 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_DATA
;
162 spin_unlock(&inode
->i_lock
);
166 void nfs_zap_acl_cache(struct inode
*inode
)
168 void (*clear_acl_cache
)(struct inode
*);
170 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
171 if (clear_acl_cache
!= NULL
)
172 clear_acl_cache(inode
);
173 spin_lock(&inode
->i_lock
);
174 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
175 spin_unlock(&inode
->i_lock
);
178 void nfs_invalidate_atime(struct inode
*inode
)
180 spin_lock(&inode
->i_lock
);
181 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATIME
;
182 spin_unlock(&inode
->i_lock
);
186 * Invalidate, but do not unhash, the inode.
187 * NB: must be called with inode->i_lock held!
189 static void nfs_invalidate_inode(struct inode
*inode
)
191 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
192 nfs_zap_caches_locked(inode
);
195 struct nfs_find_desc
{
197 struct nfs_fattr
*fattr
;
201 * In NFSv3 we can have 64bit inode numbers. In order to support
202 * this, and re-exported directories (also seen in NFSv2)
203 * we are forced to allow 2 different inodes to have the same
207 nfs_find_actor(struct inode
*inode
, void *opaque
)
209 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
210 struct nfs_fh
*fh
= desc
->fh
;
211 struct nfs_fattr
*fattr
= desc
->fattr
;
213 if (NFS_FILEID(inode
) != fattr
->fileid
)
215 if (nfs_compare_fh(NFS_FH(inode
), fh
))
217 if (is_bad_inode(inode
) || NFS_STALE(inode
))
223 nfs_init_locked(struct inode
*inode
, void *opaque
)
225 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
226 struct nfs_fattr
*fattr
= desc
->fattr
;
228 set_nfs_fileid(inode
, fattr
->fileid
);
229 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
233 /* Don't use READDIRPLUS on directories that we believe are too large */
234 #define NFS_LIMIT_READDIRPLUS (8*PAGE_SIZE)
237 * This is our front-end to iget that looks up inodes by file handle
238 * instead of inode number.
241 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
)
243 struct nfs_find_desc desc
= {
247 struct inode
*inode
= ERR_PTR(-ENOENT
);
250 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
252 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
255 hash
= nfs_fattr_to_ino_t(fattr
);
257 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
259 inode
= ERR_PTR(-ENOMEM
);
263 if (inode
->i_state
& I_NEW
) {
264 struct nfs_inode
*nfsi
= NFS_I(inode
);
265 unsigned long now
= jiffies
;
267 /* We set i_ino for the few things that still rely on it,
271 /* We can't support update_atime(), since the server will reset it */
272 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
273 inode
->i_mode
= fattr
->mode
;
274 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
275 && nfs_server_capable(inode
, NFS_CAP_MODE
))
276 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
277 | NFS_INO_INVALID_ACCESS
278 | NFS_INO_INVALID_ACL
;
279 /* Why so? Because we want revalidate for devices/FIFOs, and
280 * that's precisely what we have in nfs_file_inode_operations.
282 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
283 if (S_ISREG(inode
->i_mode
)) {
284 inode
->i_fop
= &nfs_file_operations
;
285 inode
->i_data
.a_ops
= &nfs_file_aops
;
286 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
287 } else if (S_ISDIR(inode
->i_mode
)) {
288 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
289 inode
->i_fop
= &nfs_dir_operations
;
290 if (nfs_server_capable(inode
, NFS_CAP_READDIRPLUS
)
291 && fattr
->size
<= NFS_LIMIT_READDIRPLUS
)
292 set_bit(NFS_INO_ADVISE_RDPLUS
, &NFS_I(inode
)->flags
);
293 /* Deal with crossing mountpoints */
294 if ((fattr
->valid
& NFS_ATTR_FATTR_FSID
)
295 && !nfs_fsid_equal(&NFS_SB(sb
)->fsid
, &fattr
->fsid
)) {
296 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
297 inode
->i_op
= &nfs_referral_inode_operations
;
299 inode
->i_op
= &nfs_mountpoint_inode_operations
;
301 set_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
);
303 } else if (S_ISLNK(inode
->i_mode
))
304 inode
->i_op
= &nfs_symlink_inode_operations
;
306 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
308 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
309 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
310 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
311 nfsi
->change_attr
= 0;
317 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
319 nfsi
->read_cache_jiffies
= fattr
->time_start
;
320 nfsi
->attr_gencount
= fattr
->gencount
;
321 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
322 inode
->i_atime
= fattr
->atime
;
323 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
324 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
325 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
326 inode
->i_mtime
= fattr
->mtime
;
327 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
328 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
329 | NFS_INO_INVALID_DATA
;
330 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
331 inode
->i_ctime
= fattr
->ctime
;
332 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
333 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
334 | NFS_INO_INVALID_ACCESS
335 | NFS_INO_INVALID_ACL
;
336 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
337 nfsi
->change_attr
= fattr
->change_attr
;
338 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
339 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
340 | NFS_INO_INVALID_DATA
;
341 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
342 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
344 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
345 | NFS_INO_INVALID_DATA
346 | NFS_INO_REVAL_PAGECACHE
;
347 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
348 inode
->i_nlink
= fattr
->nlink
;
349 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
350 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
;
351 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
352 inode
->i_uid
= fattr
->uid
;
353 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
354 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
355 | NFS_INO_INVALID_ACCESS
356 | NFS_INO_INVALID_ACL
;
357 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
358 inode
->i_gid
= fattr
->gid
;
359 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
360 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
361 | NFS_INO_INVALID_ACCESS
362 | NFS_INO_INVALID_ACL
;
363 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
364 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
365 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
367 * report the blocks in 512byte units
369 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
371 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
372 nfsi
->attrtimeo_timestamp
= now
;
373 nfsi
->access_cache
= RB_ROOT
;
375 nfs_fscache_init_inode_cookie(inode
);
377 unlock_new_inode(inode
);
379 nfs_refresh_inode(inode
, fattr
);
380 dprintk("NFS: nfs_fhget(%s/%Ld ct=%d)\n",
382 (long long)NFS_FILEID(inode
),
383 atomic_read(&inode
->i_count
));
389 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
393 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE)
396 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
398 struct inode
*inode
= dentry
->d_inode
;
399 struct nfs_fattr fattr
;
402 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
404 /* skip mode change if it's just for clearing setuid/setgid */
405 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
406 attr
->ia_valid
&= ~ATTR_MODE
;
408 if (attr
->ia_valid
& ATTR_SIZE
) {
409 if (!S_ISREG(inode
->i_mode
) || attr
->ia_size
== i_size_read(inode
))
410 attr
->ia_valid
&= ~ATTR_SIZE
;
413 /* Optimization: if the end result is no change, don't RPC */
414 attr
->ia_valid
&= NFS_VALID_ATTRS
;
415 if ((attr
->ia_valid
& ~ATTR_FILE
) == 0)
418 /* Write all dirty data */
419 if (S_ISREG(inode
->i_mode
)) {
420 filemap_write_and_wait(inode
->i_mapping
);
424 * Return any delegations if we're going to change ACLs
426 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
427 nfs_inode_return_delegation(inode
);
428 error
= NFS_PROTO(inode
)->setattr(dentry
, &fattr
, attr
);
430 nfs_refresh_inode(inode
, &fattr
);
435 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
436 * @inode: inode of the file used
437 * @offset: file offset to start truncating
439 * This is a copy of the common vmtruncate, but with the locking
440 * corrected to take into account the fact that NFS requires
441 * inode->i_size to be updated under the inode->i_lock.
443 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
448 err
= inode_newsize_ok(inode
, offset
);
452 spin_lock(&inode
->i_lock
);
453 oldsize
= inode
->i_size
;
454 i_size_write(inode
, offset
);
455 spin_unlock(&inode
->i_lock
);
457 truncate_pagecache(inode
, oldsize
, offset
);
463 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
464 * @inode: pointer to struct inode
465 * @attr: pointer to struct iattr
467 * Note: we do this in the *proc.c in order to ensure that
468 * it works for things like exclusive creates too.
470 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
472 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
473 spin_lock(&inode
->i_lock
);
474 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
475 int mode
= attr
->ia_mode
& S_IALLUGO
;
476 mode
|= inode
->i_mode
& ~S_IALLUGO
;
477 inode
->i_mode
= mode
;
479 if ((attr
->ia_valid
& ATTR_UID
) != 0)
480 inode
->i_uid
= attr
->ia_uid
;
481 if ((attr
->ia_valid
& ATTR_GID
) != 0)
482 inode
->i_gid
= attr
->ia_gid
;
483 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
484 spin_unlock(&inode
->i_lock
);
486 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
487 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
488 nfs_vmtruncate(inode
, attr
->ia_size
);
492 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
494 struct inode
*inode
= dentry
->d_inode
;
495 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
498 /* Flush out writes to the server in order to update c/mtime. */
499 if (S_ISREG(inode
->i_mode
)) {
500 err
= filemap_write_and_wait(inode
->i_mapping
);
506 * We may force a getattr if the user cares about atime.
508 * Note that we only have to check the vfsmount flags here:
509 * - NFS always sets S_NOATIME by so checking it would give a
511 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
512 * no point in checking those.
514 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
515 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
519 err
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
521 err
= nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
523 generic_fillattr(inode
, stat
);
524 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
531 * nfs_close_context - Common close_context() routine NFSv2/v3
532 * @ctx: pointer to context
533 * @is_sync: is this a synchronous close
535 * always ensure that the attributes are up to date if we're mounted
536 * with close-to-open semantics
538 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
541 struct nfs_server
*server
;
543 if (!(ctx
->mode
& FMODE_WRITE
))
547 inode
= ctx
->path
.dentry
->d_inode
;
548 if (!list_empty(&NFS_I(inode
)->open_files
))
550 server
= NFS_SERVER(inode
);
551 if (server
->flags
& NFS_MOUNT_NOCTO
)
553 nfs_revalidate_inode(server
, inode
);
556 static struct nfs_open_context
*alloc_nfs_open_context(struct path
*path
, struct rpc_cred
*cred
)
558 struct nfs_open_context
*ctx
;
560 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
563 path_get(&ctx
->path
);
564 ctx
->cred
= get_rpccred(cred
);
566 ctx
->lockowner
= current
->files
;
570 atomic_set(&ctx
->count
, 1);
575 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
578 atomic_inc(&ctx
->count
);
582 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
584 struct inode
*inode
= ctx
->path
.dentry
->d_inode
;
586 if (!atomic_dec_and_lock(&ctx
->count
, &inode
->i_lock
))
588 list_del(&ctx
->list
);
589 spin_unlock(&inode
->i_lock
);
590 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
591 if (ctx
->cred
!= NULL
)
592 put_rpccred(ctx
->cred
);
593 path_put(&ctx
->path
);
597 void put_nfs_open_context(struct nfs_open_context
*ctx
)
599 __put_nfs_open_context(ctx
, 0);
602 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
604 __put_nfs_open_context(ctx
, 1);
608 * Ensure that mmap has a recent RPC credential for use when writing out
611 static void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
613 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
614 struct nfs_inode
*nfsi
= NFS_I(inode
);
616 filp
->private_data
= get_nfs_open_context(ctx
);
617 spin_lock(&inode
->i_lock
);
618 list_add(&ctx
->list
, &nfsi
->open_files
);
619 spin_unlock(&inode
->i_lock
);
623 * Given an inode, search for an open context with the desired characteristics
625 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
627 struct nfs_inode
*nfsi
= NFS_I(inode
);
628 struct nfs_open_context
*pos
, *ctx
= NULL
;
630 spin_lock(&inode
->i_lock
);
631 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
632 if (cred
!= NULL
&& pos
->cred
!= cred
)
634 if ((pos
->mode
& mode
) == mode
) {
635 ctx
= get_nfs_open_context(pos
);
639 spin_unlock(&inode
->i_lock
);
643 static void nfs_file_clear_open_context(struct file
*filp
)
645 struct inode
*inode
= filp
->f_path
.dentry
->d_inode
;
646 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
649 filp
->private_data
= NULL
;
650 spin_lock(&inode
->i_lock
);
651 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
652 spin_unlock(&inode
->i_lock
);
653 put_nfs_open_context_sync(ctx
);
658 * These allocate and release file read/write context information.
660 int nfs_open(struct inode
*inode
, struct file
*filp
)
662 struct nfs_open_context
*ctx
;
663 struct rpc_cred
*cred
;
665 cred
= rpc_lookup_cred();
667 return PTR_ERR(cred
);
668 ctx
= alloc_nfs_open_context(&filp
->f_path
, cred
);
672 ctx
->mode
= filp
->f_mode
;
673 nfs_file_set_open_context(filp
, ctx
);
674 put_nfs_open_context(ctx
);
675 nfs_fscache_set_inode_cookie(inode
, filp
);
679 int nfs_release(struct inode
*inode
, struct file
*filp
)
681 nfs_file_clear_open_context(filp
);
686 * This function is called whenever some part of NFS notices that
687 * the cached attributes have to be refreshed.
690 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
692 int status
= -ESTALE
;
693 struct nfs_fattr fattr
;
694 struct nfs_inode
*nfsi
= NFS_I(inode
);
696 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Ld)\n",
697 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
699 if (is_bad_inode(inode
))
701 if (NFS_STALE(inode
))
704 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
705 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), &fattr
);
707 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) getattr failed, error=%d\n",
709 (long long)NFS_FILEID(inode
), status
);
710 if (status
== -ESTALE
) {
711 nfs_zap_caches(inode
);
712 if (!S_ISDIR(inode
->i_mode
))
713 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
718 status
= nfs_refresh_inode(inode
, &fattr
);
720 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Ld) refresh failed, error=%d\n",
722 (long long)NFS_FILEID(inode
), status
);
726 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
727 nfs_zap_acl_cache(inode
);
729 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) revalidation complete\n",
731 (long long)NFS_FILEID(inode
));
737 int nfs_attribute_timeout(struct inode
*inode
)
739 struct nfs_inode
*nfsi
= NFS_I(inode
);
741 if (nfs_have_delegation(inode
, FMODE_READ
))
743 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
747 * nfs_revalidate_inode - Revalidate the inode attributes
748 * @server - pointer to nfs_server struct
749 * @inode - pointer to inode struct
751 * Updates inode attribute information by retrieving the data from the server.
753 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
755 if (!(NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATTR
)
756 && !nfs_attribute_timeout(inode
))
757 return NFS_STALE(inode
) ? -ESTALE
: 0;
758 return __nfs_revalidate_inode(server
, inode
);
761 static int nfs_invalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
763 struct nfs_inode
*nfsi
= NFS_I(inode
);
765 if (mapping
->nrpages
!= 0) {
766 int ret
= invalidate_inode_pages2(mapping
);
770 spin_lock(&inode
->i_lock
);
771 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
772 if (S_ISDIR(inode
->i_mode
))
773 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
774 spin_unlock(&inode
->i_lock
);
775 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
776 nfs_fscache_reset_inode_cookie(inode
);
777 dfprintk(PAGECACHE
, "NFS: (%s/%Ld) data cache invalidated\n",
778 inode
->i_sb
->s_id
, (long long)NFS_FILEID(inode
));
782 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
786 mutex_lock(&inode
->i_mutex
);
787 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_DATA
) {
788 ret
= nfs_sync_mapping(mapping
);
790 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
792 mutex_unlock(&inode
->i_mutex
);
797 * nfs_revalidate_mapping_nolock - Revalidate the pagecache
798 * @inode - pointer to host inode
799 * @mapping - pointer to mapping
801 int nfs_revalidate_mapping_nolock(struct inode
*inode
, struct address_space
*mapping
)
803 struct nfs_inode
*nfsi
= NFS_I(inode
);
806 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
807 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
808 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
812 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
813 ret
= nfs_invalidate_mapping_nolock(inode
, mapping
);
819 * nfs_revalidate_mapping - Revalidate the pagecache
820 * @inode - pointer to host inode
821 * @mapping - pointer to mapping
823 * This version of the function will take the inode->i_mutex and attempt to
824 * flush out all dirty data if it needs to invalidate the page cache.
826 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
828 struct nfs_inode
*nfsi
= NFS_I(inode
);
831 if ((nfsi
->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
832 || nfs_attribute_timeout(inode
) || NFS_STALE(inode
)) {
833 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
837 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
838 ret
= nfs_invalidate_mapping(inode
, mapping
);
843 static void nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
845 struct nfs_inode
*nfsi
= NFS_I(inode
);
847 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
848 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
849 && nfsi
->change_attr
== fattr
->pre_change_attr
) {
850 nfsi
->change_attr
= fattr
->change_attr
;
851 if (S_ISDIR(inode
->i_mode
))
852 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
854 /* If we have atomic WCC data, we may update some attributes */
855 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
856 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
857 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
))
858 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
860 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
861 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
862 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
863 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
864 if (S_ISDIR(inode
->i_mode
))
865 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
867 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
868 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
869 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
870 && nfsi
->npages
== 0)
871 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
875 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
876 * @inode - pointer to inode
877 * @fattr - updated attributes
879 * Verifies the attribute cache. If we have just changed the attributes,
880 * so that fattr carries weak cache consistency data, then it may
881 * also update the ctime/mtime/change_attribute.
883 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
885 struct nfs_inode
*nfsi
= NFS_I(inode
);
886 loff_t cur_size
, new_isize
;
887 unsigned long invalid
= 0;
890 /* Has the inode gone and changed behind our back? */
891 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
893 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
896 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
897 nfsi
->change_attr
!= fattr
->change_attr
)
898 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
900 /* Verify a few of the more important attributes */
901 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
902 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
904 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
905 cur_size
= i_size_read(inode
);
906 new_isize
= nfs_size_to_loff_t(fattr
->size
);
907 if (cur_size
!= new_isize
&& nfsi
->npages
== 0)
908 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
911 /* Have any file permissions changed? */
912 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
913 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
914 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && inode
->i_uid
!= fattr
->uid
)
915 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
916 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && inode
->i_gid
!= fattr
->gid
)
917 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
919 /* Has the link count changed? */
920 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
921 invalid
|= NFS_INO_INVALID_ATTR
;
923 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
924 invalid
|= NFS_INO_INVALID_ATIME
;
927 nfsi
->cache_validity
|= invalid
;
929 nfsi
->read_cache_jiffies
= fattr
->time_start
;
933 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
935 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
937 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
940 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
942 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
944 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
947 static atomic_long_t nfs_attr_generation_counter
;
949 static unsigned long nfs_read_attr_generation_counter(void)
951 return atomic_long_read(&nfs_attr_generation_counter
);
954 unsigned long nfs_inc_attr_generation_counter(void)
956 return atomic_long_inc_return(&nfs_attr_generation_counter
);
959 void nfs_fattr_init(struct nfs_fattr
*fattr
)
962 fattr
->time_start
= jiffies
;
963 fattr
->gencount
= nfs_inc_attr_generation_counter();
967 * nfs_inode_attrs_need_update - check if the inode attributes need updating
968 * @inode - pointer to inode
969 * @fattr - attributes
971 * Attempt to divine whether or not an RPC call reply carrying stale
972 * attributes got scheduled after another call carrying updated ones.
974 * To do so, the function first assumes that a more recent ctime means
975 * that the attributes in fattr are newer, however it also attempt to
976 * catch the case where ctime either didn't change, or went backwards
977 * (if someone reset the clock on the server) by looking at whether
978 * or not this RPC call was started after the inode was last updated.
979 * Note also the check for wraparound of 'attr_gencount'
981 * The function returns 'true' if it thinks the attributes in 'fattr' are
982 * more recent than the ones cached in the inode.
985 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
987 const struct nfs_inode
*nfsi
= NFS_I(inode
);
989 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
990 nfs_ctime_need_update(inode
, fattr
) ||
991 nfs_size_need_update(inode
, fattr
) ||
992 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
995 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
997 if (nfs_inode_attrs_need_update(inode
, fattr
))
998 return nfs_update_inode(inode
, fattr
);
999 return nfs_check_inode_attributes(inode
, fattr
);
1003 * nfs_refresh_inode - try to update the inode attribute cache
1004 * @inode - pointer to inode
1005 * @fattr - updated attributes
1007 * Check that an RPC call that returned attributes has not overlapped with
1008 * other recent updates of the inode metadata, then decide whether it is
1009 * safe to do a full update of the inode attributes, or whether just to
1010 * call nfs_check_inode_attributes.
1012 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1016 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1018 spin_lock(&inode
->i_lock
);
1019 status
= nfs_refresh_inode_locked(inode
, fattr
);
1020 spin_unlock(&inode
->i_lock
);
1025 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1027 struct nfs_inode
*nfsi
= NFS_I(inode
);
1029 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1030 if (S_ISDIR(inode
->i_mode
))
1031 nfsi
->cache_validity
|= NFS_INO_INVALID_DATA
;
1032 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1034 return nfs_refresh_inode_locked(inode
, fattr
);
1038 * nfs_post_op_update_inode - try to update the inode attribute cache
1039 * @inode - pointer to inode
1040 * @fattr - updated attributes
1042 * After an operation that has changed the inode metadata, mark the
1043 * attribute cache as being invalid, then try to update it.
1045 * NB: if the server didn't return any post op attributes, this
1046 * function will force the retrieval of attributes before the next
1047 * NFS request. Thus it should be used only for operations that
1048 * are expected to change one or more attributes, to avoid
1049 * unnecessary NFS requests and trips through nfs_update_inode().
1051 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1055 spin_lock(&inode
->i_lock
);
1056 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1057 spin_unlock(&inode
->i_lock
);
1062 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1063 * @inode - pointer to inode
1064 * @fattr - updated attributes
1066 * After an operation that has changed the inode metadata, mark the
1067 * attribute cache as being invalid, then try to update it. Fake up
1068 * weak cache consistency data, if none exist.
1070 * This function is mainly designed to be used by the ->write_done() functions.
1072 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1076 spin_lock(&inode
->i_lock
);
1077 /* Don't do a WCC update if these attributes are already stale */
1078 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1079 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1080 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1081 | NFS_ATTR_FATTR_PRESIZE
1082 | NFS_ATTR_FATTR_PREMTIME
1083 | NFS_ATTR_FATTR_PRECTIME
);
1086 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1087 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1088 fattr
->pre_change_attr
= NFS_I(inode
)->change_attr
;
1089 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1091 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1092 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1093 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1094 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1096 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1097 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1098 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1099 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1101 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1102 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1103 fattr
->pre_size
= i_size_read(inode
);
1104 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1107 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1108 spin_unlock(&inode
->i_lock
);
1113 * Many nfs protocol calls return the new file attributes after
1114 * an operation. Here we update the inode to reflect the state
1115 * of the server's inode.
1117 * This is a bit tricky because we have to make sure all dirty pages
1118 * have been sent off to the server before calling invalidate_inode_pages.
1119 * To make sure no other process adds more write requests while we try
1120 * our best to flush them, we make them sleep during the attribute refresh.
1122 * A very similar scenario holds for the dir cache.
1124 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1126 struct nfs_server
*server
;
1127 struct nfs_inode
*nfsi
= NFS_I(inode
);
1128 loff_t cur_isize
, new_isize
;
1129 unsigned long invalid
= 0;
1130 unsigned long now
= jiffies
;
1131 unsigned long save_cache_validity
;
1133 dfprintk(VFS
, "NFS: %s(%s/%ld ct=%d info=0x%x)\n",
1134 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1135 atomic_read(&inode
->i_count
), fattr
->valid
);
1137 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1141 * Make sure the inode's type hasn't changed.
1143 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1146 server
= NFS_SERVER(inode
);
1147 /* Update the fsid? */
1148 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1149 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1150 !test_bit(NFS_INO_MOUNTPOINT
, &nfsi
->flags
))
1151 server
->fsid
= fattr
->fsid
;
1154 * Update the read time so we don't revalidate too often.
1156 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1158 save_cache_validity
= nfsi
->cache_validity
;
1159 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1160 | NFS_INO_INVALID_ATIME
1161 | NFS_INO_REVAL_FORCED
1162 | NFS_INO_REVAL_PAGECACHE
);
1164 /* Do atomic weak cache consistency updates */
1165 nfs_wcc_update_inode(inode
, fattr
);
1167 /* More cache consistency checks */
1168 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1169 if (nfsi
->change_attr
!= fattr
->change_attr
) {
1170 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1171 inode
->i_sb
->s_id
, inode
->i_ino
);
1172 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1173 if (S_ISDIR(inode
->i_mode
))
1174 nfs_force_lookup_revalidate(inode
);
1175 nfsi
->change_attr
= fattr
->change_attr
;
1177 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1178 invalid
|= save_cache_validity
;
1180 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1181 /* NFSv2/v3: Check if the mtime agrees */
1182 if (!timespec_equal(&inode
->i_mtime
, &fattr
->mtime
)) {
1183 dprintk("NFS: mtime change on server for file %s/%ld\n",
1184 inode
->i_sb
->s_id
, inode
->i_ino
);
1185 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1186 if (S_ISDIR(inode
->i_mode
))
1187 nfs_force_lookup_revalidate(inode
);
1188 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1190 } else if (server
->caps
& NFS_CAP_MTIME
)
1191 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1192 | NFS_INO_INVALID_DATA
1193 | NFS_INO_REVAL_PAGECACHE
1194 | NFS_INO_REVAL_FORCED
);
1196 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1197 /* If ctime has changed we should definitely clear access+acl caches */
1198 if (!timespec_equal(&inode
->i_ctime
, &fattr
->ctime
)) {
1199 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1200 /* and probably clear data for a directory too as utimes can cause
1201 * havoc with our cache.
1203 if (S_ISDIR(inode
->i_mode
)) {
1204 invalid
|= NFS_INO_INVALID_DATA
;
1205 nfs_force_lookup_revalidate(inode
);
1207 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1209 } else if (server
->caps
& NFS_CAP_CTIME
)
1210 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1211 | NFS_INO_INVALID_ACCESS
1212 | NFS_INO_INVALID_ACL
1213 | NFS_INO_REVAL_FORCED
);
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
);
1230 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1231 | NFS_INO_REVAL_PAGECACHE
1232 | NFS_INO_REVAL_FORCED
);
1235 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1236 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1237 else if (server
->caps
& NFS_CAP_ATIME
)
1238 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATIME
1239 | NFS_INO_REVAL_FORCED
);
1241 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1242 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1243 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1244 newmode
|= fattr
->mode
& S_IALLUGO
;
1245 inode
->i_mode
= newmode
;
1246 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1248 } else if (server
->caps
& NFS_CAP_MODE
)
1249 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1250 | NFS_INO_INVALID_ACCESS
1251 | NFS_INO_INVALID_ACL
1252 | NFS_INO_REVAL_FORCED
);
1254 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1255 if (inode
->i_uid
!= fattr
->uid
) {
1256 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1257 inode
->i_uid
= fattr
->uid
;
1259 } else if (server
->caps
& NFS_CAP_OWNER
)
1260 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1261 | NFS_INO_INVALID_ACCESS
1262 | NFS_INO_INVALID_ACL
1263 | NFS_INO_REVAL_FORCED
);
1265 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1266 if (inode
->i_gid
!= fattr
->gid
) {
1267 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1268 inode
->i_gid
= fattr
->gid
;
1270 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1271 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1272 | NFS_INO_INVALID_ACCESS
1273 | NFS_INO_INVALID_ACL
1274 | NFS_INO_REVAL_FORCED
);
1276 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1277 if (inode
->i_nlink
!= fattr
->nlink
) {
1278 invalid
|= NFS_INO_INVALID_ATTR
;
1279 if (S_ISDIR(inode
->i_mode
))
1280 invalid
|= NFS_INO_INVALID_DATA
;
1281 inode
->i_nlink
= fattr
->nlink
;
1283 } else if (server
->caps
& NFS_CAP_NLINK
)
1284 invalid
|= save_cache_validity
& (NFS_INO_INVALID_ATTR
1285 | NFS_INO_REVAL_FORCED
);
1287 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1289 * report the blocks in 512byte units
1291 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1293 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1294 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1296 /* Update attrtimeo value if we're out of the unstable period */
1297 if (invalid
& NFS_INO_INVALID_ATTR
) {
1298 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1299 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1300 nfsi
->attrtimeo_timestamp
= now
;
1301 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1303 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1304 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1305 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1306 nfsi
->attrtimeo_timestamp
= now
;
1309 invalid
&= ~NFS_INO_INVALID_ATTR
;
1310 /* Don't invalidate the data if we were to blame */
1311 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1312 || S_ISLNK(inode
->i_mode
)))
1313 invalid
&= ~NFS_INO_INVALID_DATA
;
1314 if (!nfs_have_delegation(inode
, FMODE_READ
) ||
1315 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1316 nfsi
->cache_validity
|= invalid
;
1321 * Big trouble! The inode has become a different object.
1323 printk(KERN_DEBUG
"%s: inode %ld mode changed, %07o to %07o\n",
1324 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1327 * No need to worry about unhashing the dentry, as the
1328 * lookup validation will know that the inode is bad.
1329 * (But we fall through to invalidate the caches.)
1331 nfs_invalidate_inode(inode
);
1335 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1336 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1337 NFS_SERVER(inode
)->nfs_client
->cl_hostname
, inode
->i_sb
->s_id
,
1338 (long long)nfsi
->fileid
, (long long)fattr
->fileid
);
1343 #ifdef CONFIG_NFS_V4
1346 * Clean out any remaining NFSv4 state that might be left over due
1347 * to open() calls that passed nfs_atomic_lookup, but failed to call
1350 void nfs4_clear_inode(struct inode
*inode
)
1352 /* If we are holding a delegation, return it! */
1353 nfs_inode_return_delegation_noreclaim(inode
);
1354 /* First call standard NFS clear_inode() code */
1355 nfs_clear_inode(inode
);
1359 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1361 struct nfs_inode
*nfsi
;
1362 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1366 nfsi
->cache_validity
= 0UL;
1367 #ifdef CONFIG_NFS_V3_ACL
1368 nfsi
->acl_access
= ERR_PTR(-EAGAIN
);
1369 nfsi
->acl_default
= ERR_PTR(-EAGAIN
);
1371 #ifdef CONFIG_NFS_V4
1372 nfsi
->nfs4_acl
= NULL
;
1373 #endif /* CONFIG_NFS_V4 */
1374 return &nfsi
->vfs_inode
;
1377 void nfs_destroy_inode(struct inode
*inode
)
1379 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1382 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1384 #ifdef CONFIG_NFS_V4
1385 INIT_LIST_HEAD(&nfsi
->open_states
);
1386 nfsi
->delegation
= NULL
;
1387 nfsi
->delegation_state
= 0;
1388 init_rwsem(&nfsi
->rwsem
);
1392 static void init_once(void *foo
)
1394 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1396 inode_init_once(&nfsi
->vfs_inode
);
1397 INIT_LIST_HEAD(&nfsi
->open_files
);
1398 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1399 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1400 INIT_RADIX_TREE(&nfsi
->nfs_page_tree
, GFP_ATOMIC
);
1403 atomic_set(&nfsi
->silly_count
, 1);
1404 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1405 init_waitqueue_head(&nfsi
->waitqueue
);
1406 nfs4_init_once(nfsi
);
1409 static int __init
nfs_init_inodecache(void)
1411 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1412 sizeof(struct nfs_inode
),
1413 0, (SLAB_RECLAIM_ACCOUNT
|
1416 if (nfs_inode_cachep
== NULL
)
1422 static void nfs_destroy_inodecache(void)
1424 kmem_cache_destroy(nfs_inode_cachep
);
1427 struct workqueue_struct
*nfsiod_workqueue
;
1430 * start up the nfsiod workqueue
1432 static int nfsiod_start(void)
1434 struct workqueue_struct
*wq
;
1435 dprintk("RPC: creating workqueue nfsiod\n");
1436 wq
= create_singlethread_workqueue("nfsiod");
1439 nfsiod_workqueue
= wq
;
1444 * Destroy the nfsiod workqueue
1446 static void nfsiod_stop(void)
1448 struct workqueue_struct
*wq
;
1450 wq
= nfsiod_workqueue
;
1453 nfsiod_workqueue
= NULL
;
1454 destroy_workqueue(wq
);
1460 static int __init
init_nfs_fs(void)
1464 err
= nfs_dns_resolver_init();
1468 err
= nfs_fscache_register();
1472 err
= nfsiod_start();
1476 err
= nfs_fs_proc_init();
1480 err
= nfs_init_nfspagecache();
1484 err
= nfs_init_inodecache();
1488 err
= nfs_init_readpagecache();
1492 err
= nfs_init_writepagecache();
1496 err
= nfs_init_directcache();
1500 #ifdef CONFIG_PROC_FS
1501 rpc_proc_register(&nfs_rpcstat
);
1503 if ((err
= register_nfs_fs()) != 0)
1507 #ifdef CONFIG_PROC_FS
1508 rpc_proc_unregister("nfs");
1510 nfs_destroy_directcache();
1512 nfs_destroy_writepagecache();
1514 nfs_destroy_readpagecache();
1516 nfs_destroy_inodecache();
1518 nfs_destroy_nfspagecache();
1524 nfs_fscache_unregister();
1526 nfs_dns_resolver_destroy();
1531 static void __exit
exit_nfs_fs(void)
1533 nfs_destroy_directcache();
1534 nfs_destroy_writepagecache();
1535 nfs_destroy_readpagecache();
1536 nfs_destroy_inodecache();
1537 nfs_destroy_nfspagecache();
1538 nfs_fscache_unregister();
1539 nfs_dns_resolver_destroy();
1540 #ifdef CONFIG_PROC_FS
1541 rpc_proc_unregister("nfs");
1543 unregister_nfs_fs();
1548 /* Not quite true; I just maintain it */
1549 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1550 MODULE_LICENSE("GPL");
1551 module_param(enable_ino64
, bool, 0644);
1553 module_init(init_nfs_fs
)
1554 module_exit(exit_nfs_fs
)