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/vfs.h>
36 #include <linux/inet.h>
37 #include <linux/nfs_xdr.h>
38 #include <linux/slab.h>
39 #include <linux/compat.h>
40 #include <linux/freezer.h>
42 #include <asm/uaccess.h>
46 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_VFS
58 #define NFS_64_BIT_INODE_NUMBERS_ENABLED 1
60 /* Default is to see 64-bit inode numbers */
61 static bool enable_ino64
= NFS_64_BIT_INODE_NUMBERS_ENABLED
;
63 static void nfs_invalidate_inode(struct inode
*);
64 static int nfs_update_inode(struct inode
*, struct nfs_fattr
*);
66 static struct kmem_cache
* nfs_inode_cachep
;
68 static inline unsigned long
69 nfs_fattr_to_ino_t(struct nfs_fattr
*fattr
)
71 return nfs_fileid_to_ino_t(fattr
->fileid
);
75 * nfs_wait_bit_killable - helper for functions that are sleeping on bit locks
76 * @word: long word containing the bit lock
78 int nfs_wait_bit_killable(struct wait_bit_key
*key
)
80 if (fatal_signal_pending(current
))
82 freezable_schedule_unsafe();
85 EXPORT_SYMBOL_GPL(nfs_wait_bit_killable
);
88 * nfs_compat_user_ino64 - returns the user-visible inode number
89 * @fileid: 64-bit fileid
91 * This function returns a 32-bit inode number if the boot parameter
92 * nfs.enable_ino64 is zero.
94 u64
nfs_compat_user_ino64(u64 fileid
)
105 if (sizeof(ino
) < sizeof(fileid
))
106 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
110 int nfs_drop_inode(struct inode
*inode
)
112 return NFS_STALE(inode
) || generic_drop_inode(inode
);
114 EXPORT_SYMBOL_GPL(nfs_drop_inode
);
116 void nfs_clear_inode(struct inode
*inode
)
119 * The following should never happen...
121 WARN_ON_ONCE(nfs_have_writebacks(inode
));
122 WARN_ON_ONCE(!list_empty(&NFS_I(inode
)->open_files
));
123 nfs_zap_acl_cache(inode
);
124 nfs_access_zap_cache(inode
);
125 nfs_fscache_clear_inode(inode
);
127 EXPORT_SYMBOL_GPL(nfs_clear_inode
);
129 void nfs_evict_inode(struct inode
*inode
)
131 truncate_inode_pages_final(&inode
->i_data
);
133 nfs_clear_inode(inode
);
137 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
139 int nfs_sync_mapping(struct address_space
*mapping
)
143 if (mapping
->nrpages
!= 0) {
144 unmap_mapping_range(mapping
, 0, 0, 0);
145 ret
= nfs_wb_all(mapping
->host
);
150 static void nfs_set_cache_invalid(struct inode
*inode
, unsigned long flags
)
152 struct nfs_inode
*nfsi
= NFS_I(inode
);
154 if (inode
->i_mapping
->nrpages
== 0)
155 flags
&= ~NFS_INO_INVALID_DATA
;
156 nfsi
->cache_validity
|= flags
;
157 if (flags
& NFS_INO_INVALID_DATA
)
158 nfs_fscache_invalidate(inode
);
162 * Invalidate the local caches
164 static void nfs_zap_caches_locked(struct inode
*inode
)
166 struct nfs_inode
*nfsi
= NFS_I(inode
);
167 int mode
= inode
->i_mode
;
169 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
171 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
172 nfsi
->attrtimeo_timestamp
= jiffies
;
174 memset(NFS_I(inode
)->cookieverf
, 0, sizeof(NFS_I(inode
)->cookieverf
));
175 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
)) {
176 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
177 | NFS_INO_INVALID_DATA
178 | NFS_INO_INVALID_ACCESS
179 | NFS_INO_INVALID_ACL
180 | NFS_INO_REVAL_PAGECACHE
);
182 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
183 | NFS_INO_INVALID_ACCESS
184 | NFS_INO_INVALID_ACL
185 | NFS_INO_REVAL_PAGECACHE
);
186 nfs_zap_label_cache_locked(nfsi
);
189 void nfs_zap_caches(struct inode
*inode
)
191 spin_lock(&inode
->i_lock
);
192 nfs_zap_caches_locked(inode
);
193 spin_unlock(&inode
->i_lock
);
195 EXPORT_SYMBOL_GPL(nfs_zap_caches
);
197 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
199 if (mapping
->nrpages
!= 0) {
200 spin_lock(&inode
->i_lock
);
201 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
202 spin_unlock(&inode
->i_lock
);
206 void nfs_zap_acl_cache(struct inode
*inode
)
208 void (*clear_acl_cache
)(struct inode
*);
210 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
211 if (clear_acl_cache
!= NULL
)
212 clear_acl_cache(inode
);
213 spin_lock(&inode
->i_lock
);
214 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
215 spin_unlock(&inode
->i_lock
);
217 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache
);
219 void nfs_invalidate_atime(struct inode
*inode
)
221 spin_lock(&inode
->i_lock
);
222 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATIME
);
223 spin_unlock(&inode
->i_lock
);
225 EXPORT_SYMBOL_GPL(nfs_invalidate_atime
);
228 * Invalidate, but do not unhash, the inode.
229 * NB: must be called with inode->i_lock held!
231 static void nfs_invalidate_inode(struct inode
*inode
)
233 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
234 nfs_zap_caches_locked(inode
);
237 struct nfs_find_desc
{
239 struct nfs_fattr
*fattr
;
243 * In NFSv3 we can have 64bit inode numbers. In order to support
244 * this, and re-exported directories (also seen in NFSv2)
245 * we are forced to allow 2 different inodes to have the same
249 nfs_find_actor(struct inode
*inode
, void *opaque
)
251 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
252 struct nfs_fh
*fh
= desc
->fh
;
253 struct nfs_fattr
*fattr
= desc
->fattr
;
255 if (NFS_FILEID(inode
) != fattr
->fileid
)
257 if ((S_IFMT
& inode
->i_mode
) != (S_IFMT
& fattr
->mode
))
259 if (nfs_compare_fh(NFS_FH(inode
), fh
))
261 if (is_bad_inode(inode
) || NFS_STALE(inode
))
267 nfs_init_locked(struct inode
*inode
, void *opaque
)
269 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
270 struct nfs_fattr
*fattr
= desc
->fattr
;
272 set_nfs_fileid(inode
, fattr
->fileid
);
273 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
277 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
278 static void nfs_clear_label_invalid(struct inode
*inode
)
280 spin_lock(&inode
->i_lock
);
281 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_LABEL
;
282 spin_unlock(&inode
->i_lock
);
285 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
286 struct nfs4_label
*label
)
293 if ((fattr
->valid
& NFS_ATTR_FATTR_V4_SECURITY_LABEL
) && inode
->i_security
) {
294 error
= security_inode_notifysecctx(inode
, label
->label
,
297 printk(KERN_ERR
"%s() %s %d "
298 "security_inode_notifysecctx() %d\n",
300 (char *)label
->label
,
302 nfs_clear_label_invalid(inode
);
306 struct nfs4_label
*nfs4_label_alloc(struct nfs_server
*server
, gfp_t flags
)
308 struct nfs4_label
*label
= NULL
;
309 int minor_version
= server
->nfs_client
->cl_minorversion
;
311 if (minor_version
< 2)
314 if (!(server
->caps
& NFS_CAP_SECURITY_LABEL
))
317 label
= kzalloc(sizeof(struct nfs4_label
), flags
);
319 return ERR_PTR(-ENOMEM
);
321 label
->label
= kzalloc(NFS4_MAXLABELLEN
, flags
);
322 if (label
->label
== NULL
) {
324 return ERR_PTR(-ENOMEM
);
326 label
->len
= NFS4_MAXLABELLEN
;
330 EXPORT_SYMBOL_GPL(nfs4_label_alloc
);
332 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
333 struct nfs4_label
*label
)
337 EXPORT_SYMBOL_GPL(nfs_setsecurity
);
340 * This is our front-end to iget that looks up inodes by file handle
341 * instead of inode number.
344 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
, struct nfs4_label
*label
)
346 struct nfs_find_desc desc
= {
350 struct inode
*inode
= ERR_PTR(-ENOENT
);
353 nfs_attr_check_mountpoint(sb
, fattr
);
355 if (nfs_attr_use_mounted_on_fileid(fattr
))
356 fattr
->fileid
= fattr
->mounted_on_fileid
;
357 else if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
359 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
362 hash
= nfs_fattr_to_ino_t(fattr
);
364 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
366 inode
= ERR_PTR(-ENOMEM
);
370 if (inode
->i_state
& I_NEW
) {
371 struct nfs_inode
*nfsi
= NFS_I(inode
);
372 unsigned long now
= jiffies
;
374 /* We set i_ino for the few things that still rely on it,
378 /* We can't support update_atime(), since the server will reset it */
379 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
380 inode
->i_mode
= fattr
->mode
;
381 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
382 && nfs_server_capable(inode
, NFS_CAP_MODE
))
383 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
384 /* Why so? Because we want revalidate for devices/FIFOs, and
385 * that's precisely what we have in nfs_file_inode_operations.
387 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
388 if (S_ISREG(inode
->i_mode
)) {
389 inode
->i_fop
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_ops
;
390 inode
->i_data
.a_ops
= &nfs_file_aops
;
391 } else if (S_ISDIR(inode
->i_mode
)) {
392 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
393 inode
->i_fop
= &nfs_dir_operations
;
394 inode
->i_data
.a_ops
= &nfs_dir_aops
;
395 /* Deal with crossing mountpoints */
396 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
397 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
398 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
399 inode
->i_op
= &nfs_referral_inode_operations
;
401 inode
->i_op
= &nfs_mountpoint_inode_operations
;
403 inode
->i_flags
|= S_AUTOMOUNT
;
405 } else if (S_ISLNK(inode
->i_mode
))
406 inode
->i_op
= &nfs_symlink_inode_operations
;
408 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
410 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
411 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
412 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
413 inode
->i_version
= 0;
416 inode
->i_uid
= make_kuid(&init_user_ns
, -2);
417 inode
->i_gid
= make_kgid(&init_user_ns
, -2);
419 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
423 nfsi
->read_cache_jiffies
= fattr
->time_start
;
424 nfsi
->attr_gencount
= fattr
->gencount
;
425 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
426 inode
->i_atime
= fattr
->atime
;
427 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
428 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
429 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
430 inode
->i_mtime
= fattr
->mtime
;
431 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
432 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
433 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
434 inode
->i_ctime
= fattr
->ctime
;
435 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
436 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
437 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
438 inode
->i_version
= fattr
->change_attr
;
439 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
440 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
441 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
442 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
444 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
445 | NFS_INO_REVAL_PAGECACHE
);
446 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
447 set_nlink(inode
, fattr
->nlink
);
448 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
449 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
450 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
451 inode
->i_uid
= fattr
->uid
;
452 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
453 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
454 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
455 inode
->i_gid
= fattr
->gid
;
456 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
457 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
458 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
459 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
460 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
462 * report the blocks in 512byte units
464 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
467 nfs_setsecurity(inode
, fattr
, label
);
469 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
470 nfsi
->attrtimeo_timestamp
= now
;
471 nfsi
->access_cache
= RB_ROOT
;
473 nfs_fscache_init_inode(inode
);
475 unlock_new_inode(inode
);
477 nfs_refresh_inode(inode
, fattr
);
478 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
480 (unsigned long long)NFS_FILEID(inode
),
481 nfs_display_fhandle_hash(fh
),
482 atomic_read(&inode
->i_count
));
488 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
491 EXPORT_SYMBOL_GPL(nfs_fhget
);
493 #define NFS_VALID_ATTRS (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_SIZE|ATTR_ATIME|ATTR_ATIME_SET|ATTR_MTIME|ATTR_MTIME_SET|ATTR_FILE|ATTR_OPEN)
496 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
498 struct inode
*inode
= dentry
->d_inode
;
499 struct nfs_fattr
*fattr
;
502 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
504 /* skip mode change if it's just for clearing setuid/setgid */
505 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
506 attr
->ia_valid
&= ~ATTR_MODE
;
508 if (attr
->ia_valid
& ATTR_SIZE
) {
511 BUG_ON(!S_ISREG(inode
->i_mode
));
513 i_size
= i_size_read(inode
);
514 if (attr
->ia_size
== i_size
)
515 attr
->ia_valid
&= ~ATTR_SIZE
;
516 else if (attr
->ia_size
< i_size
&& IS_SWAPFILE(inode
))
520 /* Optimization: if the end result is no change, don't RPC */
521 attr
->ia_valid
&= NFS_VALID_ATTRS
;
522 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
525 trace_nfs_setattr_enter(inode
);
527 /* Write all dirty data */
528 if (S_ISREG(inode
->i_mode
)) {
529 nfs_inode_dio_wait(inode
);
533 fattr
= nfs_alloc_fattr();
537 * Return any delegations if we're going to change ACLs
539 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
540 NFS_PROTO(inode
)->return_delegation(inode
);
541 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
543 error
= nfs_refresh_inode(inode
, fattr
);
544 nfs_free_fattr(fattr
);
546 trace_nfs_setattr_exit(inode
, error
);
549 EXPORT_SYMBOL_GPL(nfs_setattr
);
552 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
553 * @inode: inode of the file used
554 * @offset: file offset to start truncating
556 * This is a copy of the common vmtruncate, but with the locking
557 * corrected to take into account the fact that NFS requires
558 * inode->i_size to be updated under the inode->i_lock.
560 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
564 err
= inode_newsize_ok(inode
, offset
);
568 spin_lock(&inode
->i_lock
);
569 i_size_write(inode
, offset
);
572 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
573 spin_unlock(&inode
->i_lock
);
575 truncate_pagecache(inode
, offset
);
581 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
582 * @inode: pointer to struct inode
583 * @attr: pointer to struct iattr
585 * Note: we do this in the *proc.c in order to ensure that
586 * it works for things like exclusive creates too.
588 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
590 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
591 spin_lock(&inode
->i_lock
);
592 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
593 int mode
= attr
->ia_mode
& S_IALLUGO
;
594 mode
|= inode
->i_mode
& ~S_IALLUGO
;
595 inode
->i_mode
= mode
;
597 if ((attr
->ia_valid
& ATTR_UID
) != 0)
598 inode
->i_uid
= attr
->ia_uid
;
599 if ((attr
->ia_valid
& ATTR_GID
) != 0)
600 inode
->i_gid
= attr
->ia_gid
;
601 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
602 | NFS_INO_INVALID_ACL
);
603 spin_unlock(&inode
->i_lock
);
605 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
606 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
607 nfs_vmtruncate(inode
, attr
->ia_size
);
610 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
612 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
614 struct dentry
*parent
;
616 parent
= dget_parent(dentry
);
617 nfs_force_use_readdirplus(parent
->d_inode
);
621 static bool nfs_need_revalidate_inode(struct inode
*inode
)
623 if (NFS_I(inode
)->cache_validity
&
624 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
626 if (nfs_attribute_cache_expired(inode
))
631 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
633 struct inode
*inode
= dentry
->d_inode
;
634 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
637 trace_nfs_getattr_enter(inode
);
638 /* Flush out writes to the server in order to update c/mtime. */
639 if (S_ISREG(inode
->i_mode
)) {
640 nfs_inode_dio_wait(inode
);
641 err
= filemap_write_and_wait(inode
->i_mapping
);
647 * We may force a getattr if the user cares about atime.
649 * Note that we only have to check the vfsmount flags here:
650 * - NFS always sets S_NOATIME by so checking it would give a
652 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
653 * no point in checking those.
655 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
656 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
659 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
660 struct nfs_server
*server
= NFS_SERVER(inode
);
662 if (server
->caps
& NFS_CAP_READDIRPLUS
)
663 nfs_request_parent_use_readdirplus(dentry
);
664 err
= __nfs_revalidate_inode(server
, inode
);
667 generic_fillattr(inode
, stat
);
668 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
671 trace_nfs_getattr_exit(inode
, err
);
674 EXPORT_SYMBOL_GPL(nfs_getattr
);
676 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
678 atomic_set(&l_ctx
->count
, 1);
679 l_ctx
->lockowner
.l_owner
= current
->files
;
680 l_ctx
->lockowner
.l_pid
= current
->tgid
;
681 INIT_LIST_HEAD(&l_ctx
->list
);
682 nfs_iocounter_init(&l_ctx
->io_count
);
685 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
687 struct nfs_lock_context
*head
= &ctx
->lock_context
;
688 struct nfs_lock_context
*pos
= head
;
691 if (pos
->lockowner
.l_owner
!= current
->files
)
693 if (pos
->lockowner
.l_pid
!= current
->tgid
)
695 atomic_inc(&pos
->count
);
697 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
701 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
703 struct nfs_lock_context
*res
, *new = NULL
;
704 struct inode
*inode
= ctx
->dentry
->d_inode
;
706 spin_lock(&inode
->i_lock
);
707 res
= __nfs_find_lock_context(ctx
);
709 spin_unlock(&inode
->i_lock
);
710 new = kmalloc(sizeof(*new), GFP_KERNEL
);
712 return ERR_PTR(-ENOMEM
);
713 nfs_init_lock_context(new);
714 spin_lock(&inode
->i_lock
);
715 res
= __nfs_find_lock_context(ctx
);
717 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
718 new->open_context
= ctx
;
723 spin_unlock(&inode
->i_lock
);
727 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
729 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
731 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
732 struct inode
*inode
= ctx
->dentry
->d_inode
;
734 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
736 list_del(&l_ctx
->list
);
737 spin_unlock(&inode
->i_lock
);
740 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
743 * nfs_close_context - Common close_context() routine NFSv2/v3
744 * @ctx: pointer to context
745 * @is_sync: is this a synchronous close
747 * always ensure that the attributes are up to date if we're mounted
748 * with close-to-open semantics
750 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
753 struct nfs_server
*server
;
755 if (!(ctx
->mode
& FMODE_WRITE
))
759 inode
= ctx
->dentry
->d_inode
;
760 if (!list_empty(&NFS_I(inode
)->open_files
))
762 server
= NFS_SERVER(inode
);
763 if (server
->flags
& NFS_MOUNT_NOCTO
)
765 nfs_revalidate_inode(server
, inode
);
767 EXPORT_SYMBOL_GPL(nfs_close_context
);
769 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
771 struct nfs_open_context
*ctx
;
772 struct rpc_cred
*cred
= rpc_lookup_cred();
774 return ERR_CAST(cred
);
776 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
779 return ERR_PTR(-ENOMEM
);
781 nfs_sb_active(dentry
->d_sb
);
782 ctx
->dentry
= dget(dentry
);
788 nfs_init_lock_context(&ctx
->lock_context
);
789 ctx
->lock_context
.open_context
= ctx
;
790 INIT_LIST_HEAD(&ctx
->list
);
791 ctx
->mdsthreshold
= NULL
;
794 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
796 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
799 atomic_inc(&ctx
->lock_context
.count
);
802 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
804 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
806 struct inode
*inode
= ctx
->dentry
->d_inode
;
807 struct super_block
*sb
= ctx
->dentry
->d_sb
;
809 if (!list_empty(&ctx
->list
)) {
810 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
812 list_del(&ctx
->list
);
813 spin_unlock(&inode
->i_lock
);
814 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
817 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
818 if (ctx
->cred
!= NULL
)
819 put_rpccred(ctx
->cred
);
822 kfree(ctx
->mdsthreshold
);
826 void put_nfs_open_context(struct nfs_open_context
*ctx
)
828 __put_nfs_open_context(ctx
, 0);
830 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
833 * Ensure that mmap has a recent RPC credential for use when writing out
836 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
838 struct inode
*inode
= ctx
->dentry
->d_inode
;
839 struct nfs_inode
*nfsi
= NFS_I(inode
);
841 spin_lock(&inode
->i_lock
);
842 list_add(&ctx
->list
, &nfsi
->open_files
);
843 spin_unlock(&inode
->i_lock
);
845 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
847 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
849 filp
->private_data
= get_nfs_open_context(ctx
);
850 if (list_empty(&ctx
->list
))
851 nfs_inode_attach_open_context(ctx
);
853 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
856 * Given an inode, search for an open context with the desired characteristics
858 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
860 struct nfs_inode
*nfsi
= NFS_I(inode
);
861 struct nfs_open_context
*pos
, *ctx
= NULL
;
863 spin_lock(&inode
->i_lock
);
864 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
865 if (cred
!= NULL
&& pos
->cred
!= cred
)
867 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
869 ctx
= get_nfs_open_context(pos
);
872 spin_unlock(&inode
->i_lock
);
876 static void nfs_file_clear_open_context(struct file
*filp
)
878 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
881 struct inode
*inode
= ctx
->dentry
->d_inode
;
883 filp
->private_data
= NULL
;
884 spin_lock(&inode
->i_lock
);
885 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
886 spin_unlock(&inode
->i_lock
);
887 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
892 * These allocate and release file read/write context information.
894 int nfs_open(struct inode
*inode
, struct file
*filp
)
896 struct nfs_open_context
*ctx
;
898 ctx
= alloc_nfs_open_context(filp
->f_path
.dentry
, filp
->f_mode
);
901 nfs_file_set_open_context(filp
, ctx
);
902 put_nfs_open_context(ctx
);
903 nfs_fscache_open_file(inode
, filp
);
907 int nfs_release(struct inode
*inode
, struct file
*filp
)
909 nfs_file_clear_open_context(filp
);
914 * This function is called whenever some part of NFS notices that
915 * the cached attributes have to be refreshed.
918 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
920 int status
= -ESTALE
;
921 struct nfs4_label
*label
= NULL
;
922 struct nfs_fattr
*fattr
= NULL
;
923 struct nfs_inode
*nfsi
= NFS_I(inode
);
925 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
926 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
928 trace_nfs_revalidate_inode_enter(inode
);
930 if (is_bad_inode(inode
))
932 if (NFS_STALE(inode
))
936 fattr
= nfs_alloc_fattr();
940 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
942 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
944 status
= PTR_ERR(label
);
948 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
950 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
952 (unsigned long long)NFS_FILEID(inode
), status
);
953 if (status
== -ESTALE
) {
954 nfs_zap_caches(inode
);
955 if (!S_ISDIR(inode
->i_mode
))
956 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
961 status
= nfs_refresh_inode(inode
, fattr
);
963 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
965 (unsigned long long)NFS_FILEID(inode
), status
);
969 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
970 nfs_zap_acl_cache(inode
);
972 nfs_setsecurity(inode
, fattr
, label
);
974 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
976 (unsigned long long)NFS_FILEID(inode
));
979 nfs4_label_free(label
);
981 nfs_free_fattr(fattr
);
982 trace_nfs_revalidate_inode_exit(inode
, status
);
986 int nfs_attribute_timeout(struct inode
*inode
)
988 struct nfs_inode
*nfsi
= NFS_I(inode
);
990 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
993 int nfs_attribute_cache_expired(struct inode
*inode
)
995 if (nfs_have_delegated_attributes(inode
))
997 return nfs_attribute_timeout(inode
);
1001 * nfs_revalidate_inode - Revalidate the inode attributes
1002 * @server - pointer to nfs_server struct
1003 * @inode - pointer to inode struct
1005 * Updates inode attribute information by retrieving the data from the server.
1007 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1009 if (!nfs_need_revalidate_inode(inode
))
1010 return NFS_STALE(inode
) ? -ESTALE
: 0;
1011 return __nfs_revalidate_inode(server
, inode
);
1013 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1015 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1017 if (!(NFS_I(inode
)->cache_validity
&
1018 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1019 && !nfs_attribute_cache_expired(inode
))
1020 return NFS_STALE(inode
) ? -ESTALE
: 0;
1024 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1026 struct nfs_inode
*nfsi
= NFS_I(inode
);
1029 if (mapping
->nrpages
!= 0) {
1030 if (S_ISREG(inode
->i_mode
)) {
1031 ret
= nfs_sync_mapping(mapping
);
1035 ret
= invalidate_inode_pages2(mapping
);
1039 if (S_ISDIR(inode
->i_mode
)) {
1040 spin_lock(&inode
->i_lock
);
1041 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1042 spin_unlock(&inode
->i_lock
);
1044 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1045 nfs_fscache_wait_on_invalidate(inode
);
1047 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1049 (unsigned long long)NFS_FILEID(inode
));
1053 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1055 if (nfs_have_delegated_attributes(inode
))
1057 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1058 || nfs_attribute_timeout(inode
)
1059 || NFS_STALE(inode
);
1063 * nfs_revalidate_mapping - Revalidate the pagecache
1064 * @inode - pointer to host inode
1065 * @mapping - pointer to mapping
1067 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1069 struct nfs_inode
*nfsi
= NFS_I(inode
);
1070 unsigned long *bitlock
= &nfsi
->flags
;
1073 /* swapfiles are not supposed to be shared. */
1074 if (IS_SWAPFILE(inode
))
1077 if (nfs_mapping_need_revalidate_inode(inode
)) {
1078 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1084 * We must clear NFS_INO_INVALID_DATA first to ensure that
1085 * invalidations that come in while we're shooting down the mappings
1086 * are respected. But, that leaves a race window where one revalidator
1087 * can clear the flag, and then another checks it before the mapping
1088 * gets invalidated. Fix that by serializing access to this part of
1091 * At the same time, we need to allow other tasks to see whether we
1092 * might be in the middle of invalidating the pages, so we only set
1093 * the bit lock here if it looks like we're going to be doing that.
1096 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1097 nfs_wait_bit_killable
, TASK_KILLABLE
);
1100 spin_lock(&inode
->i_lock
);
1101 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1102 spin_unlock(&inode
->i_lock
);
1105 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1107 spin_unlock(&inode
->i_lock
);
1111 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1113 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1114 spin_unlock(&inode
->i_lock
);
1115 trace_nfs_invalidate_mapping_enter(inode
);
1116 ret
= nfs_invalidate_mapping(inode
, mapping
);
1117 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1119 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1120 smp_mb__after_atomic();
1121 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1126 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1128 struct nfs_inode
*nfsi
= NFS_I(inode
);
1129 unsigned long ret
= 0;
1131 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1132 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1133 && inode
->i_version
== fattr
->pre_change_attr
) {
1134 inode
->i_version
= fattr
->change_attr
;
1135 if (S_ISDIR(inode
->i_mode
))
1136 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1137 ret
|= NFS_INO_INVALID_ATTR
;
1139 /* If we have atomic WCC data, we may update some attributes */
1140 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1141 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1142 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1143 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1144 ret
|= NFS_INO_INVALID_ATTR
;
1147 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1148 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1149 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1150 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1151 if (S_ISDIR(inode
->i_mode
))
1152 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1153 ret
|= NFS_INO_INVALID_ATTR
;
1155 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1156 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1157 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1158 && nfsi
->nrequests
== 0) {
1159 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1160 ret
|= NFS_INO_INVALID_ATTR
;
1167 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1168 * @inode - pointer to inode
1169 * @fattr - updated attributes
1171 * Verifies the attribute cache. If we have just changed the attributes,
1172 * so that fattr carries weak cache consistency data, then it may
1173 * also update the ctime/mtime/change_attribute.
1175 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1177 struct nfs_inode
*nfsi
= NFS_I(inode
);
1178 loff_t cur_size
, new_isize
;
1179 unsigned long invalid
= 0;
1182 if (nfs_have_delegated_attributes(inode
))
1184 /* Has the inode gone and changed behind our back? */
1185 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1187 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1190 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1191 inode
->i_version
!= fattr
->change_attr
)
1192 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1194 /* Verify a few of the more important attributes */
1195 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1196 invalid
|= NFS_INO_INVALID_ATTR
;
1198 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1199 cur_size
= i_size_read(inode
);
1200 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1201 if (cur_size
!= new_isize
&& nfsi
->nrequests
== 0)
1202 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1205 /* Have any file permissions changed? */
1206 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1207 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1208 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1209 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1210 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1211 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1213 /* Has the link count changed? */
1214 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1215 invalid
|= NFS_INO_INVALID_ATTR
;
1217 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1218 invalid
|= NFS_INO_INVALID_ATIME
;
1221 nfs_set_cache_invalid(inode
, invalid
);
1223 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1227 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1229 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
1231 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
1234 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1236 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
1238 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
1241 static atomic_long_t nfs_attr_generation_counter
;
1243 static unsigned long nfs_read_attr_generation_counter(void)
1245 return atomic_long_read(&nfs_attr_generation_counter
);
1248 unsigned long nfs_inc_attr_generation_counter(void)
1250 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1253 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1256 fattr
->time_start
= jiffies
;
1257 fattr
->gencount
= nfs_inc_attr_generation_counter();
1258 fattr
->owner_name
= NULL
;
1259 fattr
->group_name
= NULL
;
1261 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1263 struct nfs_fattr
*nfs_alloc_fattr(void)
1265 struct nfs_fattr
*fattr
;
1267 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1269 nfs_fattr_init(fattr
);
1272 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1274 struct nfs_fh
*nfs_alloc_fhandle(void)
1278 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1283 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1287 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1288 * in the same way that wireshark does
1292 * For debugging only.
1294 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1296 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1297 * not on the result */
1298 return nfs_fhandle_hash(fh
);
1300 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1303 * _nfs_display_fhandle - display an NFS file handle on the console
1305 * @fh: file handle to display
1306 * @caption: display caption
1308 * For debugging only.
1310 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1314 if (fh
== NULL
|| fh
->size
== 0) {
1315 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1319 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1320 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1321 for (i
= 0; i
< fh
->size
; i
+= 16) {
1322 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1324 switch ((fh
->size
- i
- 1) >> 2) {
1326 printk(KERN_DEFAULT
" %08x\n",
1330 printk(KERN_DEFAULT
" %08x %08x\n",
1331 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1334 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1335 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1336 be32_to_cpup(pos
+ 2));
1339 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1340 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1341 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1345 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1349 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1350 * @inode - pointer to inode
1351 * @fattr - attributes
1353 * Attempt to divine whether or not an RPC call reply carrying stale
1354 * attributes got scheduled after another call carrying updated ones.
1356 * To do so, the function first assumes that a more recent ctime means
1357 * that the attributes in fattr are newer, however it also attempt to
1358 * catch the case where ctime either didn't change, or went backwards
1359 * (if someone reset the clock on the server) by looking at whether
1360 * or not this RPC call was started after the inode was last updated.
1361 * Note also the check for wraparound of 'attr_gencount'
1363 * The function returns 'true' if it thinks the attributes in 'fattr' are
1364 * more recent than the ones cached in the inode.
1367 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1369 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1371 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1372 nfs_ctime_need_update(inode
, fattr
) ||
1373 nfs_size_need_update(inode
, fattr
) ||
1374 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1378 * Don't trust the change_attribute, mtime, ctime or size if
1379 * a pnfs LAYOUTCOMMIT is outstanding
1381 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1382 struct nfs_fattr
*fattr
)
1384 if (pnfs_layoutcommit_outstanding(inode
))
1385 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1386 NFS_ATTR_FATTR_MTIME
|
1387 NFS_ATTR_FATTR_CTIME
|
1388 NFS_ATTR_FATTR_SIZE
);
1391 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1395 trace_nfs_refresh_inode_enter(inode
);
1397 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1399 if (nfs_inode_attrs_need_update(inode
, fattr
))
1400 ret
= nfs_update_inode(inode
, fattr
);
1402 ret
= nfs_check_inode_attributes(inode
, fattr
);
1404 trace_nfs_refresh_inode_exit(inode
, ret
);
1409 * nfs_refresh_inode - try to update the inode attribute cache
1410 * @inode - pointer to inode
1411 * @fattr - updated attributes
1413 * Check that an RPC call that returned attributes has not overlapped with
1414 * other recent updates of the inode metadata, then decide whether it is
1415 * safe to do a full update of the inode attributes, or whether just to
1416 * call nfs_check_inode_attributes.
1418 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1422 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1424 spin_lock(&inode
->i_lock
);
1425 status
= nfs_refresh_inode_locked(inode
, fattr
);
1426 spin_unlock(&inode
->i_lock
);
1430 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1432 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1434 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1436 if (S_ISDIR(inode
->i_mode
))
1437 invalid
|= NFS_INO_INVALID_DATA
;
1438 nfs_set_cache_invalid(inode
, invalid
);
1439 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1441 return nfs_refresh_inode_locked(inode
, fattr
);
1445 * nfs_post_op_update_inode - try to update the inode attribute cache
1446 * @inode - pointer to inode
1447 * @fattr - updated attributes
1449 * After an operation that has changed the inode metadata, mark the
1450 * attribute cache as being invalid, then try to update it.
1452 * NB: if the server didn't return any post op attributes, this
1453 * function will force the retrieval of attributes before the next
1454 * NFS request. Thus it should be used only for operations that
1455 * are expected to change one or more attributes, to avoid
1456 * unnecessary NFS requests and trips through nfs_update_inode().
1458 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1462 spin_lock(&inode
->i_lock
);
1463 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1464 spin_unlock(&inode
->i_lock
);
1468 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1471 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1472 * @inode - pointer to inode
1473 * @fattr - updated attributes
1475 * After an operation that has changed the inode metadata, mark the
1476 * attribute cache as being invalid, then try to update it. Fake up
1477 * weak cache consistency data, if none exist.
1479 * This function is mainly designed to be used by the ->write_done() functions.
1481 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1485 spin_lock(&inode
->i_lock
);
1486 /* Don't do a WCC update if these attributes are already stale */
1487 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1488 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1489 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1490 | NFS_ATTR_FATTR_PRESIZE
1491 | NFS_ATTR_FATTR_PREMTIME
1492 | NFS_ATTR_FATTR_PRECTIME
);
1495 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1496 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1497 fattr
->pre_change_attr
= inode
->i_version
;
1498 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1500 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1501 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1502 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1503 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1505 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1506 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1507 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1508 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1510 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1511 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1512 fattr
->pre_size
= i_size_read(inode
);
1513 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1516 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1517 spin_unlock(&inode
->i_lock
);
1520 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1523 * Many nfs protocol calls return the new file attributes after
1524 * an operation. Here we update the inode to reflect the state
1525 * of the server's inode.
1527 * This is a bit tricky because we have to make sure all dirty pages
1528 * have been sent off to the server before calling invalidate_inode_pages.
1529 * To make sure no other process adds more write requests while we try
1530 * our best to flush them, we make them sleep during the attribute refresh.
1532 * A very similar scenario holds for the dir cache.
1534 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1536 struct nfs_server
*server
;
1537 struct nfs_inode
*nfsi
= NFS_I(inode
);
1538 loff_t cur_isize
, new_isize
;
1539 unsigned long invalid
= 0;
1540 unsigned long now
= jiffies
;
1541 unsigned long save_cache_validity
;
1543 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1544 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1545 nfs_display_fhandle_hash(NFS_FH(inode
)),
1546 atomic_read(&inode
->i_count
), fattr
->valid
);
1548 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
) {
1549 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1550 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1551 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1552 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1553 (long long)fattr
->fileid
);
1558 * Make sure the inode's type hasn't changed.
1560 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1562 * Big trouble! The inode has become a different object.
1564 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1565 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1569 server
= NFS_SERVER(inode
);
1570 /* Update the fsid? */
1571 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1572 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1573 !IS_AUTOMOUNT(inode
))
1574 server
->fsid
= fattr
->fsid
;
1577 * Update the read time so we don't revalidate too often.
1579 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1581 save_cache_validity
= nfsi
->cache_validity
;
1582 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1583 | NFS_INO_INVALID_ATIME
1584 | NFS_INO_REVAL_FORCED
1585 | NFS_INO_REVAL_PAGECACHE
);
1587 /* Do atomic weak cache consistency updates */
1588 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1590 /* More cache consistency checks */
1591 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1592 if (inode
->i_version
!= fattr
->change_attr
) {
1593 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1594 inode
->i_sb
->s_id
, inode
->i_ino
);
1595 invalid
|= NFS_INO_INVALID_ATTR
1596 | NFS_INO_INVALID_DATA
1597 | NFS_INO_INVALID_ACCESS
1598 | NFS_INO_INVALID_ACL
1599 | NFS_INO_REVAL_PAGECACHE
;
1600 if (S_ISDIR(inode
->i_mode
))
1601 nfs_force_lookup_revalidate(inode
);
1602 inode
->i_version
= fattr
->change_attr
;
1604 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1605 nfsi
->cache_validity
|= save_cache_validity
;
1607 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1608 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1609 } else if (server
->caps
& NFS_CAP_MTIME
)
1610 nfsi
->cache_validity
|= save_cache_validity
&
1611 (NFS_INO_INVALID_ATTR
1612 | NFS_INO_REVAL_FORCED
);
1614 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1615 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1616 } else if (server
->caps
& NFS_CAP_CTIME
)
1617 nfsi
->cache_validity
|= save_cache_validity
&
1618 (NFS_INO_INVALID_ATTR
1619 | NFS_INO_REVAL_FORCED
);
1621 /* Check if our cached file size is stale */
1622 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1623 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1624 cur_isize
= i_size_read(inode
);
1625 if (new_isize
!= cur_isize
) {
1626 /* Do we perhaps have any outstanding writes, or has
1627 * the file grown beyond our last write? */
1628 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1629 i_size_write(inode
, new_isize
);
1630 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1631 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1633 dprintk("NFS: isize change on server for file %s/%ld "
1637 (long long)cur_isize
,
1638 (long long)new_isize
);
1641 nfsi
->cache_validity
|= save_cache_validity
&
1642 (NFS_INO_INVALID_ATTR
1643 | NFS_INO_REVAL_PAGECACHE
1644 | NFS_INO_REVAL_FORCED
);
1647 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1648 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1649 else if (server
->caps
& NFS_CAP_ATIME
)
1650 nfsi
->cache_validity
|= save_cache_validity
&
1651 (NFS_INO_INVALID_ATIME
1652 | NFS_INO_REVAL_FORCED
);
1654 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1655 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1656 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1657 newmode
|= fattr
->mode
& S_IALLUGO
;
1658 inode
->i_mode
= newmode
;
1659 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1661 } else if (server
->caps
& NFS_CAP_MODE
)
1662 nfsi
->cache_validity
|= save_cache_validity
&
1663 (NFS_INO_INVALID_ATTR
1664 | NFS_INO_INVALID_ACCESS
1665 | NFS_INO_INVALID_ACL
1666 | NFS_INO_REVAL_FORCED
);
1668 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1669 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1670 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1671 inode
->i_uid
= fattr
->uid
;
1673 } else if (server
->caps
& NFS_CAP_OWNER
)
1674 nfsi
->cache_validity
|= save_cache_validity
&
1675 (NFS_INO_INVALID_ATTR
1676 | NFS_INO_INVALID_ACCESS
1677 | NFS_INO_INVALID_ACL
1678 | NFS_INO_REVAL_FORCED
);
1680 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1681 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1682 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1683 inode
->i_gid
= fattr
->gid
;
1685 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1686 nfsi
->cache_validity
|= save_cache_validity
&
1687 (NFS_INO_INVALID_ATTR
1688 | NFS_INO_INVALID_ACCESS
1689 | NFS_INO_INVALID_ACL
1690 | NFS_INO_REVAL_FORCED
);
1692 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1693 if (inode
->i_nlink
!= fattr
->nlink
) {
1694 invalid
|= NFS_INO_INVALID_ATTR
;
1695 if (S_ISDIR(inode
->i_mode
))
1696 invalid
|= NFS_INO_INVALID_DATA
;
1697 set_nlink(inode
, fattr
->nlink
);
1699 } else if (server
->caps
& NFS_CAP_NLINK
)
1700 nfsi
->cache_validity
|= save_cache_validity
&
1701 (NFS_INO_INVALID_ATTR
1702 | NFS_INO_REVAL_FORCED
);
1704 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1706 * report the blocks in 512byte units
1708 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1710 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1711 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1713 /* Update attrtimeo value if we're out of the unstable period */
1714 if (invalid
& NFS_INO_INVALID_ATTR
) {
1715 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1716 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1717 nfsi
->attrtimeo_timestamp
= now
;
1718 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1720 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1721 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1722 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1723 nfsi
->attrtimeo_timestamp
= now
;
1726 invalid
&= ~NFS_INO_INVALID_ATTR
;
1727 /* Don't invalidate the data if we were to blame */
1728 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1729 || S_ISLNK(inode
->i_mode
)))
1730 invalid
&= ~NFS_INO_INVALID_DATA
;
1731 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1732 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1733 nfs_set_cache_invalid(inode
, invalid
);
1738 * No need to worry about unhashing the dentry, as the
1739 * lookup validation will know that the inode is bad.
1740 * (But we fall through to invalidate the caches.)
1742 nfs_invalidate_inode(inode
);
1746 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1748 struct nfs_inode
*nfsi
;
1749 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1753 nfsi
->cache_validity
= 0UL;
1754 #if IS_ENABLED(CONFIG_NFS_V4)
1755 nfsi
->nfs4_acl
= NULL
;
1756 #endif /* CONFIG_NFS_V4 */
1757 return &nfsi
->vfs_inode
;
1759 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1761 static void nfs_i_callback(struct rcu_head
*head
)
1763 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1764 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1767 void nfs_destroy_inode(struct inode
*inode
)
1769 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1771 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1773 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1775 #if IS_ENABLED(CONFIG_NFS_V4)
1776 INIT_LIST_HEAD(&nfsi
->open_states
);
1777 nfsi
->delegation
= NULL
;
1778 nfsi
->delegation_state
= 0;
1779 init_rwsem(&nfsi
->rwsem
);
1780 nfsi
->layout
= NULL
;
1784 static void init_once(void *foo
)
1786 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1788 inode_init_once(&nfsi
->vfs_inode
);
1789 INIT_LIST_HEAD(&nfsi
->open_files
);
1790 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1791 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1792 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1793 nfsi
->nrequests
= 0;
1794 nfsi
->commit_info
.ncommit
= 0;
1795 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1796 atomic_set(&nfsi
->silly_count
, 1);
1797 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1798 init_waitqueue_head(&nfsi
->waitqueue
);
1799 nfs4_init_once(nfsi
);
1802 static int __init
nfs_init_inodecache(void)
1804 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1805 sizeof(struct nfs_inode
),
1806 0, (SLAB_RECLAIM_ACCOUNT
|
1809 if (nfs_inode_cachep
== NULL
)
1815 static void nfs_destroy_inodecache(void)
1818 * Make sure all delayed rcu free inodes are flushed before we
1822 kmem_cache_destroy(nfs_inode_cachep
);
1825 struct workqueue_struct
*nfsiod_workqueue
;
1826 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1829 * start up the nfsiod workqueue
1831 static int nfsiod_start(void)
1833 struct workqueue_struct
*wq
;
1834 dprintk("RPC: creating workqueue nfsiod\n");
1835 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1838 nfsiod_workqueue
= wq
;
1843 * Destroy the nfsiod workqueue
1845 static void nfsiod_stop(void)
1847 struct workqueue_struct
*wq
;
1849 wq
= nfsiod_workqueue
;
1852 nfsiod_workqueue
= NULL
;
1853 destroy_workqueue(wq
);
1857 EXPORT_SYMBOL_GPL(nfs_net_id
);
1859 static int nfs_net_init(struct net
*net
)
1861 nfs_clients_init(net
);
1862 return nfs_fs_proc_net_init(net
);
1865 static void nfs_net_exit(struct net
*net
)
1867 nfs_fs_proc_net_exit(net
);
1868 nfs_cleanup_cb_ident_idr(net
);
1871 static struct pernet_operations nfs_net_ops
= {
1872 .init
= nfs_net_init
,
1873 .exit
= nfs_net_exit
,
1875 .size
= sizeof(struct nfs_net
),
1881 static int __init
init_nfs_fs(void)
1885 err
= register_pernet_subsys(&nfs_net_ops
);
1889 err
= nfs_fscache_register();
1893 err
= nfsiod_start();
1897 err
= nfs_fs_proc_init();
1901 err
= nfs_init_nfspagecache();
1905 err
= nfs_init_inodecache();
1909 err
= nfs_init_readpagecache();
1913 err
= nfs_init_writepagecache();
1917 err
= nfs_init_directcache();
1921 #ifdef CONFIG_PROC_FS
1922 rpc_proc_register(&init_net
, &nfs_rpcstat
);
1924 if ((err
= register_nfs_fs()) != 0)
1929 #ifdef CONFIG_PROC_FS
1930 rpc_proc_unregister(&init_net
, "nfs");
1932 nfs_destroy_directcache();
1934 nfs_destroy_writepagecache();
1936 nfs_destroy_readpagecache();
1938 nfs_destroy_inodecache();
1940 nfs_destroy_nfspagecache();
1946 nfs_fscache_unregister();
1948 unregister_pernet_subsys(&nfs_net_ops
);
1953 static void __exit
exit_nfs_fs(void)
1955 nfs_destroy_directcache();
1956 nfs_destroy_writepagecache();
1957 nfs_destroy_readpagecache();
1958 nfs_destroy_inodecache();
1959 nfs_destroy_nfspagecache();
1960 nfs_fscache_unregister();
1961 unregister_pernet_subsys(&nfs_net_ops
);
1962 #ifdef CONFIG_PROC_FS
1963 rpc_proc_unregister(&init_net
, "nfs");
1965 unregister_nfs_fs();
1970 /* Not quite true; I just maintain it */
1971 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1972 MODULE_LICENSE("GPL");
1973 module_param(enable_ino64
, bool, 0644);
1975 module_init(init_nfs_fs
)
1976 module_exit(exit_nfs_fs
)