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 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
392 } else if (S_ISDIR(inode
->i_mode
)) {
393 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
394 inode
->i_fop
= &nfs_dir_operations
;
395 inode
->i_data
.a_ops
= &nfs_dir_aops
;
396 /* Deal with crossing mountpoints */
397 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
398 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
399 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
400 inode
->i_op
= &nfs_referral_inode_operations
;
402 inode
->i_op
= &nfs_mountpoint_inode_operations
;
404 inode
->i_flags
|= S_AUTOMOUNT
;
406 } else if (S_ISLNK(inode
->i_mode
))
407 inode
->i_op
= &nfs_symlink_inode_operations
;
409 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
411 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
412 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
413 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
414 inode
->i_version
= 0;
417 inode
->i_uid
= make_kuid(&init_user_ns
, -2);
418 inode
->i_gid
= make_kgid(&init_user_ns
, -2);
420 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
424 nfsi
->read_cache_jiffies
= fattr
->time_start
;
425 nfsi
->attr_gencount
= fattr
->gencount
;
426 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
427 inode
->i_atime
= fattr
->atime
;
428 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
429 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
430 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
431 inode
->i_mtime
= fattr
->mtime
;
432 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
433 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
434 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
435 inode
->i_ctime
= fattr
->ctime
;
436 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
437 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
438 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
439 inode
->i_version
= fattr
->change_attr
;
440 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
441 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
442 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
443 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
445 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
446 | NFS_INO_REVAL_PAGECACHE
);
447 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
448 set_nlink(inode
, fattr
->nlink
);
449 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
450 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
451 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
452 inode
->i_uid
= fattr
->uid
;
453 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
454 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
455 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
456 inode
->i_gid
= fattr
->gid
;
457 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
458 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
459 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
460 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
461 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
463 * report the blocks in 512byte units
465 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
468 nfs_setsecurity(inode
, fattr
, label
);
470 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
471 nfsi
->attrtimeo_timestamp
= now
;
472 nfsi
->access_cache
= RB_ROOT
;
474 nfs_fscache_init_inode(inode
);
476 unlock_new_inode(inode
);
478 nfs_refresh_inode(inode
, fattr
);
479 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
481 (unsigned long long)NFS_FILEID(inode
),
482 nfs_display_fhandle_hash(fh
),
483 atomic_read(&inode
->i_count
));
489 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
492 EXPORT_SYMBOL_GPL(nfs_fhget
);
494 #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)
497 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
499 struct inode
*inode
= dentry
->d_inode
;
500 struct nfs_fattr
*fattr
;
503 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
505 /* skip mode change if it's just for clearing setuid/setgid */
506 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
507 attr
->ia_valid
&= ~ATTR_MODE
;
509 if (attr
->ia_valid
& ATTR_SIZE
) {
510 BUG_ON(!S_ISREG(inode
->i_mode
));
512 if (attr
->ia_size
== i_size_read(inode
))
513 attr
->ia_valid
&= ~ATTR_SIZE
;
516 /* Optimization: if the end result is no change, don't RPC */
517 attr
->ia_valid
&= NFS_VALID_ATTRS
;
518 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
521 trace_nfs_setattr_enter(inode
);
523 /* Write all dirty data */
524 if (S_ISREG(inode
->i_mode
)) {
525 nfs_inode_dio_wait(inode
);
529 fattr
= nfs_alloc_fattr();
533 * Return any delegations if we're going to change ACLs
535 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
536 NFS_PROTO(inode
)->return_delegation(inode
);
537 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
539 error
= nfs_refresh_inode(inode
, fattr
);
540 nfs_free_fattr(fattr
);
542 trace_nfs_setattr_exit(inode
, error
);
545 EXPORT_SYMBOL_GPL(nfs_setattr
);
548 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
549 * @inode: inode of the file used
550 * @offset: file offset to start truncating
552 * This is a copy of the common vmtruncate, but with the locking
553 * corrected to take into account the fact that NFS requires
554 * inode->i_size to be updated under the inode->i_lock.
556 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
560 err
= inode_newsize_ok(inode
, offset
);
564 spin_lock(&inode
->i_lock
);
565 i_size_write(inode
, offset
);
568 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
569 spin_unlock(&inode
->i_lock
);
571 truncate_pagecache(inode
, offset
);
577 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
578 * @inode: pointer to struct inode
579 * @attr: pointer to struct iattr
581 * Note: we do this in the *proc.c in order to ensure that
582 * it works for things like exclusive creates too.
584 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
586 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
587 spin_lock(&inode
->i_lock
);
588 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
589 int mode
= attr
->ia_mode
& S_IALLUGO
;
590 mode
|= inode
->i_mode
& ~S_IALLUGO
;
591 inode
->i_mode
= mode
;
593 if ((attr
->ia_valid
& ATTR_UID
) != 0)
594 inode
->i_uid
= attr
->ia_uid
;
595 if ((attr
->ia_valid
& ATTR_GID
) != 0)
596 inode
->i_gid
= attr
->ia_gid
;
597 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
598 | NFS_INO_INVALID_ACL
);
599 spin_unlock(&inode
->i_lock
);
601 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
602 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
603 nfs_vmtruncate(inode
, attr
->ia_size
);
606 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
608 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
610 struct dentry
*parent
;
612 parent
= dget_parent(dentry
);
613 nfs_force_use_readdirplus(parent
->d_inode
);
617 static bool nfs_need_revalidate_inode(struct inode
*inode
)
619 if (NFS_I(inode
)->cache_validity
&
620 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
622 if (nfs_attribute_cache_expired(inode
))
627 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
629 struct inode
*inode
= dentry
->d_inode
;
630 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
633 trace_nfs_getattr_enter(inode
);
634 /* Flush out writes to the server in order to update c/mtime. */
635 if (S_ISREG(inode
->i_mode
)) {
636 nfs_inode_dio_wait(inode
);
637 err
= filemap_write_and_wait(inode
->i_mapping
);
643 * We may force a getattr if the user cares about atime.
645 * Note that we only have to check the vfsmount flags here:
646 * - NFS always sets S_NOATIME by so checking it would give a
648 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
649 * no point in checking those.
651 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
652 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
655 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
656 struct nfs_server
*server
= NFS_SERVER(inode
);
658 if (server
->caps
& NFS_CAP_READDIRPLUS
)
659 nfs_request_parent_use_readdirplus(dentry
);
660 err
= __nfs_revalidate_inode(server
, inode
);
663 generic_fillattr(inode
, stat
);
664 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
667 trace_nfs_getattr_exit(inode
, err
);
670 EXPORT_SYMBOL_GPL(nfs_getattr
);
672 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
674 atomic_set(&l_ctx
->count
, 1);
675 l_ctx
->lockowner
.l_owner
= current
->files
;
676 l_ctx
->lockowner
.l_pid
= current
->tgid
;
677 INIT_LIST_HEAD(&l_ctx
->list
);
678 nfs_iocounter_init(&l_ctx
->io_count
);
681 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
683 struct nfs_lock_context
*head
= &ctx
->lock_context
;
684 struct nfs_lock_context
*pos
= head
;
687 if (pos
->lockowner
.l_owner
!= current
->files
)
689 if (pos
->lockowner
.l_pid
!= current
->tgid
)
691 atomic_inc(&pos
->count
);
693 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
697 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
699 struct nfs_lock_context
*res
, *new = NULL
;
700 struct inode
*inode
= ctx
->dentry
->d_inode
;
702 spin_lock(&inode
->i_lock
);
703 res
= __nfs_find_lock_context(ctx
);
705 spin_unlock(&inode
->i_lock
);
706 new = kmalloc(sizeof(*new), GFP_KERNEL
);
708 return ERR_PTR(-ENOMEM
);
709 nfs_init_lock_context(new);
710 spin_lock(&inode
->i_lock
);
711 res
= __nfs_find_lock_context(ctx
);
713 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
714 new->open_context
= ctx
;
719 spin_unlock(&inode
->i_lock
);
723 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
725 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
727 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
728 struct inode
*inode
= ctx
->dentry
->d_inode
;
730 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
732 list_del(&l_ctx
->list
);
733 spin_unlock(&inode
->i_lock
);
736 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
739 * nfs_close_context - Common close_context() routine NFSv2/v3
740 * @ctx: pointer to context
741 * @is_sync: is this a synchronous close
743 * always ensure that the attributes are up to date if we're mounted
744 * with close-to-open semantics
746 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
749 struct nfs_server
*server
;
751 if (!(ctx
->mode
& FMODE_WRITE
))
755 inode
= ctx
->dentry
->d_inode
;
756 if (!list_empty(&NFS_I(inode
)->open_files
))
758 server
= NFS_SERVER(inode
);
759 if (server
->flags
& NFS_MOUNT_NOCTO
)
761 nfs_revalidate_inode(server
, inode
);
763 EXPORT_SYMBOL_GPL(nfs_close_context
);
765 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
767 struct nfs_open_context
*ctx
;
768 struct rpc_cred
*cred
= rpc_lookup_cred();
770 return ERR_CAST(cred
);
772 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
775 return ERR_PTR(-ENOMEM
);
777 nfs_sb_active(dentry
->d_sb
);
778 ctx
->dentry
= dget(dentry
);
784 nfs_init_lock_context(&ctx
->lock_context
);
785 ctx
->lock_context
.open_context
= ctx
;
786 INIT_LIST_HEAD(&ctx
->list
);
787 ctx
->mdsthreshold
= NULL
;
790 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
792 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
795 atomic_inc(&ctx
->lock_context
.count
);
798 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
800 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
802 struct inode
*inode
= ctx
->dentry
->d_inode
;
803 struct super_block
*sb
= ctx
->dentry
->d_sb
;
805 if (!list_empty(&ctx
->list
)) {
806 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
808 list_del(&ctx
->list
);
809 spin_unlock(&inode
->i_lock
);
810 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
813 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
814 if (ctx
->cred
!= NULL
)
815 put_rpccred(ctx
->cred
);
818 kfree(ctx
->mdsthreshold
);
822 void put_nfs_open_context(struct nfs_open_context
*ctx
)
824 __put_nfs_open_context(ctx
, 0);
826 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
829 * Ensure that mmap has a recent RPC credential for use when writing out
832 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
834 struct inode
*inode
= ctx
->dentry
->d_inode
;
835 struct nfs_inode
*nfsi
= NFS_I(inode
);
837 spin_lock(&inode
->i_lock
);
838 list_add(&ctx
->list
, &nfsi
->open_files
);
839 spin_unlock(&inode
->i_lock
);
841 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
843 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
845 filp
->private_data
= get_nfs_open_context(ctx
);
846 if (list_empty(&ctx
->list
))
847 nfs_inode_attach_open_context(ctx
);
849 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
852 * Given an inode, search for an open context with the desired characteristics
854 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
856 struct nfs_inode
*nfsi
= NFS_I(inode
);
857 struct nfs_open_context
*pos
, *ctx
= NULL
;
859 spin_lock(&inode
->i_lock
);
860 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
861 if (cred
!= NULL
&& pos
->cred
!= cred
)
863 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
865 ctx
= get_nfs_open_context(pos
);
868 spin_unlock(&inode
->i_lock
);
872 static void nfs_file_clear_open_context(struct file
*filp
)
874 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
877 struct inode
*inode
= ctx
->dentry
->d_inode
;
879 filp
->private_data
= NULL
;
880 spin_lock(&inode
->i_lock
);
881 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
882 spin_unlock(&inode
->i_lock
);
883 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
888 * These allocate and release file read/write context information.
890 int nfs_open(struct inode
*inode
, struct file
*filp
)
892 struct nfs_open_context
*ctx
;
894 ctx
= alloc_nfs_open_context(filp
->f_path
.dentry
, filp
->f_mode
);
897 nfs_file_set_open_context(filp
, ctx
);
898 put_nfs_open_context(ctx
);
899 nfs_fscache_open_file(inode
, filp
);
903 int nfs_release(struct inode
*inode
, struct file
*filp
)
905 nfs_file_clear_open_context(filp
);
910 * This function is called whenever some part of NFS notices that
911 * the cached attributes have to be refreshed.
914 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
916 int status
= -ESTALE
;
917 struct nfs4_label
*label
= NULL
;
918 struct nfs_fattr
*fattr
= NULL
;
919 struct nfs_inode
*nfsi
= NFS_I(inode
);
921 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
922 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
924 trace_nfs_revalidate_inode_enter(inode
);
926 if (is_bad_inode(inode
))
928 if (NFS_STALE(inode
))
932 fattr
= nfs_alloc_fattr();
936 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
938 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
940 status
= PTR_ERR(label
);
944 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
946 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
948 (unsigned long long)NFS_FILEID(inode
), status
);
949 if (status
== -ESTALE
) {
950 nfs_zap_caches(inode
);
951 if (!S_ISDIR(inode
->i_mode
))
952 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
957 status
= nfs_refresh_inode(inode
, fattr
);
959 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
961 (unsigned long long)NFS_FILEID(inode
), status
);
965 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
966 nfs_zap_acl_cache(inode
);
968 nfs_setsecurity(inode
, fattr
, label
);
970 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
972 (unsigned long long)NFS_FILEID(inode
));
975 nfs4_label_free(label
);
977 nfs_free_fattr(fattr
);
978 trace_nfs_revalidate_inode_exit(inode
, status
);
982 int nfs_attribute_timeout(struct inode
*inode
)
984 struct nfs_inode
*nfsi
= NFS_I(inode
);
986 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
989 int nfs_attribute_cache_expired(struct inode
*inode
)
991 if (nfs_have_delegated_attributes(inode
))
993 return nfs_attribute_timeout(inode
);
997 * nfs_revalidate_inode - Revalidate the inode attributes
998 * @server - pointer to nfs_server struct
999 * @inode - pointer to inode struct
1001 * Updates inode attribute information by retrieving the data from the server.
1003 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1005 if (!nfs_need_revalidate_inode(inode
))
1006 return NFS_STALE(inode
) ? -ESTALE
: 0;
1007 return __nfs_revalidate_inode(server
, inode
);
1009 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1011 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1013 if (!(NFS_I(inode
)->cache_validity
&
1014 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1015 && !nfs_attribute_cache_expired(inode
))
1016 return NFS_STALE(inode
) ? -ESTALE
: 0;
1020 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1022 struct nfs_inode
*nfsi
= NFS_I(inode
);
1025 if (mapping
->nrpages
!= 0) {
1026 if (S_ISREG(inode
->i_mode
)) {
1027 ret
= nfs_sync_mapping(mapping
);
1031 ret
= invalidate_inode_pages2(mapping
);
1035 if (S_ISDIR(inode
->i_mode
)) {
1036 spin_lock(&inode
->i_lock
);
1037 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1038 spin_unlock(&inode
->i_lock
);
1040 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1041 nfs_fscache_wait_on_invalidate(inode
);
1043 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1045 (unsigned long long)NFS_FILEID(inode
));
1049 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1051 if (nfs_have_delegated_attributes(inode
))
1053 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1054 || nfs_attribute_timeout(inode
)
1055 || NFS_STALE(inode
);
1059 * nfs_revalidate_mapping - Revalidate the pagecache
1060 * @inode - pointer to host inode
1061 * @mapping - pointer to mapping
1063 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1065 struct nfs_inode
*nfsi
= NFS_I(inode
);
1066 unsigned long *bitlock
= &nfsi
->flags
;
1069 /* swapfiles are not supposed to be shared. */
1070 if (IS_SWAPFILE(inode
))
1073 if (nfs_mapping_need_revalidate_inode(inode
)) {
1074 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1080 * We must clear NFS_INO_INVALID_DATA first to ensure that
1081 * invalidations that come in while we're shooting down the mappings
1082 * are respected. But, that leaves a race window where one revalidator
1083 * can clear the flag, and then another checks it before the mapping
1084 * gets invalidated. Fix that by serializing access to this part of
1087 * At the same time, we need to allow other tasks to see whether we
1088 * might be in the middle of invalidating the pages, so we only set
1089 * the bit lock here if it looks like we're going to be doing that.
1092 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1093 nfs_wait_bit_killable
, TASK_KILLABLE
);
1096 spin_lock(&inode
->i_lock
);
1097 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1098 spin_unlock(&inode
->i_lock
);
1101 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1103 spin_unlock(&inode
->i_lock
);
1107 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1109 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1110 spin_unlock(&inode
->i_lock
);
1111 trace_nfs_invalidate_mapping_enter(inode
);
1112 ret
= nfs_invalidate_mapping(inode
, mapping
);
1113 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1115 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1116 smp_mb__after_atomic();
1117 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1122 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1124 struct nfs_inode
*nfsi
= NFS_I(inode
);
1125 unsigned long ret
= 0;
1127 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1128 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1129 && inode
->i_version
== fattr
->pre_change_attr
) {
1130 inode
->i_version
= fattr
->change_attr
;
1131 if (S_ISDIR(inode
->i_mode
))
1132 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1133 ret
|= NFS_INO_INVALID_ATTR
;
1135 /* If we have atomic WCC data, we may update some attributes */
1136 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1137 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1138 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1139 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1140 ret
|= NFS_INO_INVALID_ATTR
;
1143 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1144 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1145 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1146 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1147 if (S_ISDIR(inode
->i_mode
))
1148 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1149 ret
|= NFS_INO_INVALID_ATTR
;
1151 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1152 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1153 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1154 && nfsi
->nrequests
== 0) {
1155 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1156 ret
|= NFS_INO_INVALID_ATTR
;
1163 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1164 * @inode - pointer to inode
1165 * @fattr - updated attributes
1167 * Verifies the attribute cache. If we have just changed the attributes,
1168 * so that fattr carries weak cache consistency data, then it may
1169 * also update the ctime/mtime/change_attribute.
1171 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1173 struct nfs_inode
*nfsi
= NFS_I(inode
);
1174 loff_t cur_size
, new_isize
;
1175 unsigned long invalid
= 0;
1178 if (nfs_have_delegated_attributes(inode
))
1180 /* Has the inode gone and changed behind our back? */
1181 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1183 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1186 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1187 inode
->i_version
!= fattr
->change_attr
)
1188 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1190 /* Verify a few of the more important attributes */
1191 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1192 invalid
|= NFS_INO_INVALID_ATTR
;
1194 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1195 cur_size
= i_size_read(inode
);
1196 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1197 if (cur_size
!= new_isize
&& nfsi
->nrequests
== 0)
1198 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1201 /* Have any file permissions changed? */
1202 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1203 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1204 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1205 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1206 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1207 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1209 /* Has the link count changed? */
1210 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1211 invalid
|= NFS_INO_INVALID_ATTR
;
1213 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1214 invalid
|= NFS_INO_INVALID_ATIME
;
1217 nfs_set_cache_invalid(inode
, invalid
);
1219 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1223 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1225 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
1227 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
1230 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1232 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
1234 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
1237 static atomic_long_t nfs_attr_generation_counter
;
1239 static unsigned long nfs_read_attr_generation_counter(void)
1241 return atomic_long_read(&nfs_attr_generation_counter
);
1244 unsigned long nfs_inc_attr_generation_counter(void)
1246 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1249 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1252 fattr
->time_start
= jiffies
;
1253 fattr
->gencount
= nfs_inc_attr_generation_counter();
1254 fattr
->owner_name
= NULL
;
1255 fattr
->group_name
= NULL
;
1257 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1259 struct nfs_fattr
*nfs_alloc_fattr(void)
1261 struct nfs_fattr
*fattr
;
1263 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1265 nfs_fattr_init(fattr
);
1268 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1270 struct nfs_fh
*nfs_alloc_fhandle(void)
1274 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1279 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1283 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1284 * in the same way that wireshark does
1288 * For debugging only.
1290 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1292 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1293 * not on the result */
1294 return nfs_fhandle_hash(fh
);
1296 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1299 * _nfs_display_fhandle - display an NFS file handle on the console
1301 * @fh: file handle to display
1302 * @caption: display caption
1304 * For debugging only.
1306 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1310 if (fh
== NULL
|| fh
->size
== 0) {
1311 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1315 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1316 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1317 for (i
= 0; i
< fh
->size
; i
+= 16) {
1318 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1320 switch ((fh
->size
- i
- 1) >> 2) {
1322 printk(KERN_DEFAULT
" %08x\n",
1326 printk(KERN_DEFAULT
" %08x %08x\n",
1327 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1330 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1331 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1332 be32_to_cpup(pos
+ 2));
1335 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1336 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1337 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1341 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1345 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1346 * @inode - pointer to inode
1347 * @fattr - attributes
1349 * Attempt to divine whether or not an RPC call reply carrying stale
1350 * attributes got scheduled after another call carrying updated ones.
1352 * To do so, the function first assumes that a more recent ctime means
1353 * that the attributes in fattr are newer, however it also attempt to
1354 * catch the case where ctime either didn't change, or went backwards
1355 * (if someone reset the clock on the server) by looking at whether
1356 * or not this RPC call was started after the inode was last updated.
1357 * Note also the check for wraparound of 'attr_gencount'
1359 * The function returns 'true' if it thinks the attributes in 'fattr' are
1360 * more recent than the ones cached in the inode.
1363 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1365 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1367 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1368 nfs_ctime_need_update(inode
, fattr
) ||
1369 nfs_size_need_update(inode
, fattr
) ||
1370 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1374 * Don't trust the change_attribute, mtime, ctime or size if
1375 * a pnfs LAYOUTCOMMIT is outstanding
1377 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1378 struct nfs_fattr
*fattr
)
1380 if (pnfs_layoutcommit_outstanding(inode
))
1381 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1382 NFS_ATTR_FATTR_MTIME
|
1383 NFS_ATTR_FATTR_CTIME
|
1384 NFS_ATTR_FATTR_SIZE
);
1387 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1391 trace_nfs_refresh_inode_enter(inode
);
1393 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1395 if (nfs_inode_attrs_need_update(inode
, fattr
))
1396 ret
= nfs_update_inode(inode
, fattr
);
1398 ret
= nfs_check_inode_attributes(inode
, fattr
);
1400 trace_nfs_refresh_inode_exit(inode
, ret
);
1405 * nfs_refresh_inode - try to update the inode attribute cache
1406 * @inode - pointer to inode
1407 * @fattr - updated attributes
1409 * Check that an RPC call that returned attributes has not overlapped with
1410 * other recent updates of the inode metadata, then decide whether it is
1411 * safe to do a full update of the inode attributes, or whether just to
1412 * call nfs_check_inode_attributes.
1414 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1418 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1420 spin_lock(&inode
->i_lock
);
1421 status
= nfs_refresh_inode_locked(inode
, fattr
);
1422 spin_unlock(&inode
->i_lock
);
1426 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1428 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1430 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1432 if (S_ISDIR(inode
->i_mode
))
1433 invalid
|= NFS_INO_INVALID_DATA
;
1434 nfs_set_cache_invalid(inode
, invalid
);
1435 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1437 return nfs_refresh_inode_locked(inode
, fattr
);
1441 * nfs_post_op_update_inode - try to update the inode attribute cache
1442 * @inode - pointer to inode
1443 * @fattr - updated attributes
1445 * After an operation that has changed the inode metadata, mark the
1446 * attribute cache as being invalid, then try to update it.
1448 * NB: if the server didn't return any post op attributes, this
1449 * function will force the retrieval of attributes before the next
1450 * NFS request. Thus it should be used only for operations that
1451 * are expected to change one or more attributes, to avoid
1452 * unnecessary NFS requests and trips through nfs_update_inode().
1454 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1458 spin_lock(&inode
->i_lock
);
1459 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1460 spin_unlock(&inode
->i_lock
);
1464 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1467 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1468 * @inode - pointer to inode
1469 * @fattr - updated attributes
1471 * After an operation that has changed the inode metadata, mark the
1472 * attribute cache as being invalid, then try to update it. Fake up
1473 * weak cache consistency data, if none exist.
1475 * This function is mainly designed to be used by the ->write_done() functions.
1477 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1481 spin_lock(&inode
->i_lock
);
1482 /* Don't do a WCC update if these attributes are already stale */
1483 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1484 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1485 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1486 | NFS_ATTR_FATTR_PRESIZE
1487 | NFS_ATTR_FATTR_PREMTIME
1488 | NFS_ATTR_FATTR_PRECTIME
);
1491 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1492 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1493 fattr
->pre_change_attr
= inode
->i_version
;
1494 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1496 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1497 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1498 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1499 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1501 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1502 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1503 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1504 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1506 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1507 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1508 fattr
->pre_size
= i_size_read(inode
);
1509 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1512 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1513 spin_unlock(&inode
->i_lock
);
1516 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1519 * Many nfs protocol calls return the new file attributes after
1520 * an operation. Here we update the inode to reflect the state
1521 * of the server's inode.
1523 * This is a bit tricky because we have to make sure all dirty pages
1524 * have been sent off to the server before calling invalidate_inode_pages.
1525 * To make sure no other process adds more write requests while we try
1526 * our best to flush them, we make them sleep during the attribute refresh.
1528 * A very similar scenario holds for the dir cache.
1530 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1532 struct nfs_server
*server
;
1533 struct nfs_inode
*nfsi
= NFS_I(inode
);
1534 loff_t cur_isize
, new_isize
;
1535 unsigned long invalid
= 0;
1536 unsigned long now
= jiffies
;
1537 unsigned long save_cache_validity
;
1539 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1540 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1541 nfs_display_fhandle_hash(NFS_FH(inode
)),
1542 atomic_read(&inode
->i_count
), fattr
->valid
);
1544 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
) {
1545 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1546 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1547 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1548 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1549 (long long)fattr
->fileid
);
1554 * Make sure the inode's type hasn't changed.
1556 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1558 * Big trouble! The inode has become a different object.
1560 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1561 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1565 server
= NFS_SERVER(inode
);
1566 /* Update the fsid? */
1567 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1568 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1569 !IS_AUTOMOUNT(inode
))
1570 server
->fsid
= fattr
->fsid
;
1573 * Update the read time so we don't revalidate too often.
1575 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1577 save_cache_validity
= nfsi
->cache_validity
;
1578 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1579 | NFS_INO_INVALID_ATIME
1580 | NFS_INO_REVAL_FORCED
1581 | NFS_INO_REVAL_PAGECACHE
);
1583 /* Do atomic weak cache consistency updates */
1584 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1586 /* More cache consistency checks */
1587 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1588 if (inode
->i_version
!= fattr
->change_attr
) {
1589 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1590 inode
->i_sb
->s_id
, inode
->i_ino
);
1591 invalid
|= NFS_INO_INVALID_ATTR
1592 | NFS_INO_INVALID_DATA
1593 | NFS_INO_INVALID_ACCESS
1594 | NFS_INO_INVALID_ACL
1595 | NFS_INO_REVAL_PAGECACHE
;
1596 if (S_ISDIR(inode
->i_mode
))
1597 nfs_force_lookup_revalidate(inode
);
1598 inode
->i_version
= fattr
->change_attr
;
1600 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1601 nfsi
->cache_validity
|= save_cache_validity
;
1603 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1604 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1605 } else if (server
->caps
& NFS_CAP_MTIME
)
1606 nfsi
->cache_validity
|= save_cache_validity
&
1607 (NFS_INO_INVALID_ATTR
1608 | NFS_INO_REVAL_FORCED
);
1610 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1611 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1612 } else if (server
->caps
& NFS_CAP_CTIME
)
1613 nfsi
->cache_validity
|= save_cache_validity
&
1614 (NFS_INO_INVALID_ATTR
1615 | NFS_INO_REVAL_FORCED
);
1617 /* Check if our cached file size is stale */
1618 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1619 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1620 cur_isize
= i_size_read(inode
);
1621 if (new_isize
!= cur_isize
) {
1622 /* Do we perhaps have any outstanding writes, or has
1623 * the file grown beyond our last write? */
1624 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1625 i_size_write(inode
, new_isize
);
1626 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1627 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1629 dprintk("NFS: isize change on server for file %s/%ld "
1633 (long long)cur_isize
,
1634 (long long)new_isize
);
1637 nfsi
->cache_validity
|= save_cache_validity
&
1638 (NFS_INO_INVALID_ATTR
1639 | NFS_INO_REVAL_PAGECACHE
1640 | NFS_INO_REVAL_FORCED
);
1643 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1644 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1645 else if (server
->caps
& NFS_CAP_ATIME
)
1646 nfsi
->cache_validity
|= save_cache_validity
&
1647 (NFS_INO_INVALID_ATIME
1648 | NFS_INO_REVAL_FORCED
);
1650 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1651 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1652 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1653 newmode
|= fattr
->mode
& S_IALLUGO
;
1654 inode
->i_mode
= newmode
;
1655 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1657 } else if (server
->caps
& NFS_CAP_MODE
)
1658 nfsi
->cache_validity
|= save_cache_validity
&
1659 (NFS_INO_INVALID_ATTR
1660 | NFS_INO_INVALID_ACCESS
1661 | NFS_INO_INVALID_ACL
1662 | NFS_INO_REVAL_FORCED
);
1664 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1665 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1666 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1667 inode
->i_uid
= fattr
->uid
;
1669 } else if (server
->caps
& NFS_CAP_OWNER
)
1670 nfsi
->cache_validity
|= save_cache_validity
&
1671 (NFS_INO_INVALID_ATTR
1672 | NFS_INO_INVALID_ACCESS
1673 | NFS_INO_INVALID_ACL
1674 | NFS_INO_REVAL_FORCED
);
1676 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1677 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1678 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1679 inode
->i_gid
= fattr
->gid
;
1681 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1682 nfsi
->cache_validity
|= save_cache_validity
&
1683 (NFS_INO_INVALID_ATTR
1684 | NFS_INO_INVALID_ACCESS
1685 | NFS_INO_INVALID_ACL
1686 | NFS_INO_REVAL_FORCED
);
1688 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1689 if (inode
->i_nlink
!= fattr
->nlink
) {
1690 invalid
|= NFS_INO_INVALID_ATTR
;
1691 if (S_ISDIR(inode
->i_mode
))
1692 invalid
|= NFS_INO_INVALID_DATA
;
1693 set_nlink(inode
, fattr
->nlink
);
1695 } else if (server
->caps
& NFS_CAP_NLINK
)
1696 nfsi
->cache_validity
|= save_cache_validity
&
1697 (NFS_INO_INVALID_ATTR
1698 | NFS_INO_REVAL_FORCED
);
1700 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1702 * report the blocks in 512byte units
1704 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1706 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1707 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1709 /* Update attrtimeo value if we're out of the unstable period */
1710 if (invalid
& NFS_INO_INVALID_ATTR
) {
1711 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1712 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1713 nfsi
->attrtimeo_timestamp
= now
;
1714 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1716 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1717 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1718 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1719 nfsi
->attrtimeo_timestamp
= now
;
1722 invalid
&= ~NFS_INO_INVALID_ATTR
;
1723 /* Don't invalidate the data if we were to blame */
1724 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1725 || S_ISLNK(inode
->i_mode
)))
1726 invalid
&= ~NFS_INO_INVALID_DATA
;
1727 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1728 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1729 nfs_set_cache_invalid(inode
, invalid
);
1734 * No need to worry about unhashing the dentry, as the
1735 * lookup validation will know that the inode is bad.
1736 * (But we fall through to invalidate the caches.)
1738 nfs_invalidate_inode(inode
);
1742 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1744 struct nfs_inode
*nfsi
;
1745 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1749 nfsi
->cache_validity
= 0UL;
1750 #if IS_ENABLED(CONFIG_NFS_V4)
1751 nfsi
->nfs4_acl
= NULL
;
1752 #endif /* CONFIG_NFS_V4 */
1753 return &nfsi
->vfs_inode
;
1755 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1757 static void nfs_i_callback(struct rcu_head
*head
)
1759 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1760 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1763 void nfs_destroy_inode(struct inode
*inode
)
1765 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1767 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1769 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1771 #if IS_ENABLED(CONFIG_NFS_V4)
1772 INIT_LIST_HEAD(&nfsi
->open_states
);
1773 nfsi
->delegation
= NULL
;
1774 nfsi
->delegation_state
= 0;
1775 init_rwsem(&nfsi
->rwsem
);
1776 nfsi
->layout
= NULL
;
1780 static void init_once(void *foo
)
1782 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1784 inode_init_once(&nfsi
->vfs_inode
);
1785 INIT_LIST_HEAD(&nfsi
->open_files
);
1786 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1787 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1788 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1789 nfsi
->nrequests
= 0;
1790 nfsi
->commit_info
.ncommit
= 0;
1791 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1792 atomic_set(&nfsi
->silly_count
, 1);
1793 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1794 init_waitqueue_head(&nfsi
->waitqueue
);
1795 nfs4_init_once(nfsi
);
1798 static int __init
nfs_init_inodecache(void)
1800 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1801 sizeof(struct nfs_inode
),
1802 0, (SLAB_RECLAIM_ACCOUNT
|
1805 if (nfs_inode_cachep
== NULL
)
1811 static void nfs_destroy_inodecache(void)
1814 * Make sure all delayed rcu free inodes are flushed before we
1818 kmem_cache_destroy(nfs_inode_cachep
);
1821 struct workqueue_struct
*nfsiod_workqueue
;
1822 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1825 * start up the nfsiod workqueue
1827 static int nfsiod_start(void)
1829 struct workqueue_struct
*wq
;
1830 dprintk("RPC: creating workqueue nfsiod\n");
1831 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1834 nfsiod_workqueue
= wq
;
1839 * Destroy the nfsiod workqueue
1841 static void nfsiod_stop(void)
1843 struct workqueue_struct
*wq
;
1845 wq
= nfsiod_workqueue
;
1848 nfsiod_workqueue
= NULL
;
1849 destroy_workqueue(wq
);
1853 EXPORT_SYMBOL_GPL(nfs_net_id
);
1855 static int nfs_net_init(struct net
*net
)
1857 nfs_clients_init(net
);
1858 return nfs_fs_proc_net_init(net
);
1861 static void nfs_net_exit(struct net
*net
)
1863 nfs_fs_proc_net_exit(net
);
1864 nfs_cleanup_cb_ident_idr(net
);
1867 static struct pernet_operations nfs_net_ops
= {
1868 .init
= nfs_net_init
,
1869 .exit
= nfs_net_exit
,
1871 .size
= sizeof(struct nfs_net
),
1877 static int __init
init_nfs_fs(void)
1881 err
= register_pernet_subsys(&nfs_net_ops
);
1885 err
= nfs_fscache_register();
1889 err
= nfsiod_start();
1893 err
= nfs_fs_proc_init();
1897 err
= nfs_init_nfspagecache();
1901 err
= nfs_init_inodecache();
1905 err
= nfs_init_readpagecache();
1909 err
= nfs_init_writepagecache();
1913 err
= nfs_init_directcache();
1917 #ifdef CONFIG_PROC_FS
1918 rpc_proc_register(&init_net
, &nfs_rpcstat
);
1920 if ((err
= register_nfs_fs()) != 0)
1925 #ifdef CONFIG_PROC_FS
1926 rpc_proc_unregister(&init_net
, "nfs");
1928 nfs_destroy_directcache();
1930 nfs_destroy_writepagecache();
1932 nfs_destroy_readpagecache();
1934 nfs_destroy_inodecache();
1936 nfs_destroy_nfspagecache();
1942 nfs_fscache_unregister();
1944 unregister_pernet_subsys(&nfs_net_ops
);
1949 static void __exit
exit_nfs_fs(void)
1951 nfs_destroy_directcache();
1952 nfs_destroy_writepagecache();
1953 nfs_destroy_readpagecache();
1954 nfs_destroy_inodecache();
1955 nfs_destroy_nfspagecache();
1956 nfs_fscache_unregister();
1957 unregister_pernet_subsys(&nfs_net_ops
);
1958 #ifdef CONFIG_PROC_FS
1959 rpc_proc_unregister(&init_net
, "nfs");
1961 unregister_nfs_fs();
1966 /* Not quite true; I just maintain it */
1967 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1968 MODULE_LICENSE("GPL");
1969 module_param(enable_ino64
, bool, 0644);
1971 module_init(init_nfs_fs
)
1972 module_exit(exit_nfs_fs
)