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 (((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0) &&
356 !nfs_attr_use_mounted_on_fileid(fattr
))
358 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
361 hash
= nfs_fattr_to_ino_t(fattr
);
363 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
365 inode
= ERR_PTR(-ENOMEM
);
369 if (inode
->i_state
& I_NEW
) {
370 struct nfs_inode
*nfsi
= NFS_I(inode
);
371 unsigned long now
= jiffies
;
373 /* We set i_ino for the few things that still rely on it,
377 /* We can't support update_atime(), since the server will reset it */
378 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
379 inode
->i_mode
= fattr
->mode
;
380 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
381 && nfs_server_capable(inode
, NFS_CAP_MODE
))
382 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
383 /* Why so? Because we want revalidate for devices/FIFOs, and
384 * that's precisely what we have in nfs_file_inode_operations.
386 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
387 if (S_ISREG(inode
->i_mode
)) {
388 inode
->i_fop
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_ops
;
389 inode
->i_data
.a_ops
= &nfs_file_aops
;
390 inode
->i_data
.backing_dev_info
= &NFS_SB(sb
)->backing_dev_info
;
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
) {
509 BUG_ON(!S_ISREG(inode
->i_mode
));
511 if (attr
->ia_size
== i_size_read(inode
))
512 attr
->ia_valid
&= ~ATTR_SIZE
;
515 /* Optimization: if the end result is no change, don't RPC */
516 attr
->ia_valid
&= NFS_VALID_ATTRS
;
517 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
520 trace_nfs_setattr_enter(inode
);
522 /* Write all dirty data */
523 if (S_ISREG(inode
->i_mode
)) {
524 nfs_inode_dio_wait(inode
);
528 fattr
= nfs_alloc_fattr();
532 * Return any delegations if we're going to change ACLs
534 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
535 NFS_PROTO(inode
)->return_delegation(inode
);
536 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
538 error
= nfs_refresh_inode(inode
, fattr
);
539 nfs_free_fattr(fattr
);
541 trace_nfs_setattr_exit(inode
, error
);
544 EXPORT_SYMBOL_GPL(nfs_setattr
);
547 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
548 * @inode: inode of the file used
549 * @offset: file offset to start truncating
551 * This is a copy of the common vmtruncate, but with the locking
552 * corrected to take into account the fact that NFS requires
553 * inode->i_size to be updated under the inode->i_lock.
555 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
559 err
= inode_newsize_ok(inode
, offset
);
563 spin_lock(&inode
->i_lock
);
564 i_size_write(inode
, offset
);
567 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
568 spin_unlock(&inode
->i_lock
);
570 truncate_pagecache(inode
, offset
);
576 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
577 * @inode: pointer to struct inode
578 * @attr: pointer to struct iattr
580 * Note: we do this in the *proc.c in order to ensure that
581 * it works for things like exclusive creates too.
583 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
585 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
586 spin_lock(&inode
->i_lock
);
587 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
588 int mode
= attr
->ia_mode
& S_IALLUGO
;
589 mode
|= inode
->i_mode
& ~S_IALLUGO
;
590 inode
->i_mode
= mode
;
592 if ((attr
->ia_valid
& ATTR_UID
) != 0)
593 inode
->i_uid
= attr
->ia_uid
;
594 if ((attr
->ia_valid
& ATTR_GID
) != 0)
595 inode
->i_gid
= attr
->ia_gid
;
596 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
597 | NFS_INO_INVALID_ACL
);
598 spin_unlock(&inode
->i_lock
);
600 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
601 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
602 nfs_vmtruncate(inode
, attr
->ia_size
);
605 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
607 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
609 struct dentry
*parent
;
611 parent
= dget_parent(dentry
);
612 nfs_force_use_readdirplus(parent
->d_inode
);
616 static bool nfs_need_revalidate_inode(struct inode
*inode
)
618 if (NFS_I(inode
)->cache_validity
&
619 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
621 if (nfs_attribute_cache_expired(inode
))
626 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
628 struct inode
*inode
= dentry
->d_inode
;
629 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
632 trace_nfs_getattr_enter(inode
);
633 /* Flush out writes to the server in order to update c/mtime. */
634 if (S_ISREG(inode
->i_mode
)) {
635 nfs_inode_dio_wait(inode
);
636 err
= filemap_write_and_wait(inode
->i_mapping
);
642 * We may force a getattr if the user cares about atime.
644 * Note that we only have to check the vfsmount flags here:
645 * - NFS always sets S_NOATIME by so checking it would give a
647 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
648 * no point in checking those.
650 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
651 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
654 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
655 struct nfs_server
*server
= NFS_SERVER(inode
);
657 if (server
->caps
& NFS_CAP_READDIRPLUS
)
658 nfs_request_parent_use_readdirplus(dentry
);
659 err
= __nfs_revalidate_inode(server
, inode
);
662 generic_fillattr(inode
, stat
);
663 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
666 trace_nfs_getattr_exit(inode
, err
);
669 EXPORT_SYMBOL_GPL(nfs_getattr
);
671 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
673 atomic_set(&l_ctx
->count
, 1);
674 l_ctx
->lockowner
.l_owner
= current
->files
;
675 l_ctx
->lockowner
.l_pid
= current
->tgid
;
676 INIT_LIST_HEAD(&l_ctx
->list
);
677 nfs_iocounter_init(&l_ctx
->io_count
);
680 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
682 struct nfs_lock_context
*head
= &ctx
->lock_context
;
683 struct nfs_lock_context
*pos
= head
;
686 if (pos
->lockowner
.l_owner
!= current
->files
)
688 if (pos
->lockowner
.l_pid
!= current
->tgid
)
690 atomic_inc(&pos
->count
);
692 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
696 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
698 struct nfs_lock_context
*res
, *new = NULL
;
699 struct inode
*inode
= ctx
->dentry
->d_inode
;
701 spin_lock(&inode
->i_lock
);
702 res
= __nfs_find_lock_context(ctx
);
704 spin_unlock(&inode
->i_lock
);
705 new = kmalloc(sizeof(*new), GFP_KERNEL
);
707 return ERR_PTR(-ENOMEM
);
708 nfs_init_lock_context(new);
709 spin_lock(&inode
->i_lock
);
710 res
= __nfs_find_lock_context(ctx
);
712 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
713 new->open_context
= ctx
;
718 spin_unlock(&inode
->i_lock
);
722 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
724 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
726 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
727 struct inode
*inode
= ctx
->dentry
->d_inode
;
729 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
731 list_del(&l_ctx
->list
);
732 spin_unlock(&inode
->i_lock
);
735 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
738 * nfs_close_context - Common close_context() routine NFSv2/v3
739 * @ctx: pointer to context
740 * @is_sync: is this a synchronous close
742 * always ensure that the attributes are up to date if we're mounted
743 * with close-to-open semantics
745 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
748 struct nfs_server
*server
;
750 if (!(ctx
->mode
& FMODE_WRITE
))
754 inode
= ctx
->dentry
->d_inode
;
755 if (!list_empty(&NFS_I(inode
)->open_files
))
757 server
= NFS_SERVER(inode
);
758 if (server
->flags
& NFS_MOUNT_NOCTO
)
760 nfs_revalidate_inode(server
, inode
);
762 EXPORT_SYMBOL_GPL(nfs_close_context
);
764 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
766 struct nfs_open_context
*ctx
;
767 struct rpc_cred
*cred
= rpc_lookup_cred();
769 return ERR_CAST(cred
);
771 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
774 return ERR_PTR(-ENOMEM
);
776 nfs_sb_active(dentry
->d_sb
);
777 ctx
->dentry
= dget(dentry
);
783 nfs_init_lock_context(&ctx
->lock_context
);
784 ctx
->lock_context
.open_context
= ctx
;
785 INIT_LIST_HEAD(&ctx
->list
);
786 ctx
->mdsthreshold
= NULL
;
789 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
791 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
794 atomic_inc(&ctx
->lock_context
.count
);
797 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
799 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
801 struct inode
*inode
= ctx
->dentry
->d_inode
;
802 struct super_block
*sb
= ctx
->dentry
->d_sb
;
804 if (!list_empty(&ctx
->list
)) {
805 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
807 list_del(&ctx
->list
);
808 spin_unlock(&inode
->i_lock
);
809 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
812 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
813 if (ctx
->cred
!= NULL
)
814 put_rpccred(ctx
->cred
);
817 kfree(ctx
->mdsthreshold
);
821 void put_nfs_open_context(struct nfs_open_context
*ctx
)
823 __put_nfs_open_context(ctx
, 0);
825 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
828 * Ensure that mmap has a recent RPC credential for use when writing out
831 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
833 struct inode
*inode
= ctx
->dentry
->d_inode
;
834 struct nfs_inode
*nfsi
= NFS_I(inode
);
836 spin_lock(&inode
->i_lock
);
837 list_add(&ctx
->list
, &nfsi
->open_files
);
838 spin_unlock(&inode
->i_lock
);
840 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
842 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
844 filp
->private_data
= get_nfs_open_context(ctx
);
845 if (list_empty(&ctx
->list
))
846 nfs_inode_attach_open_context(ctx
);
848 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
851 * Given an inode, search for an open context with the desired characteristics
853 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
855 struct nfs_inode
*nfsi
= NFS_I(inode
);
856 struct nfs_open_context
*pos
, *ctx
= NULL
;
858 spin_lock(&inode
->i_lock
);
859 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
860 if (cred
!= NULL
&& pos
->cred
!= cred
)
862 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
864 ctx
= get_nfs_open_context(pos
);
867 spin_unlock(&inode
->i_lock
);
871 static void nfs_file_clear_open_context(struct file
*filp
)
873 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
876 struct inode
*inode
= ctx
->dentry
->d_inode
;
878 filp
->private_data
= NULL
;
879 spin_lock(&inode
->i_lock
);
880 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
881 spin_unlock(&inode
->i_lock
);
882 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
887 * These allocate and release file read/write context information.
889 int nfs_open(struct inode
*inode
, struct file
*filp
)
891 struct nfs_open_context
*ctx
;
893 ctx
= alloc_nfs_open_context(filp
->f_path
.dentry
, filp
->f_mode
);
896 nfs_file_set_open_context(filp
, ctx
);
897 put_nfs_open_context(ctx
);
898 nfs_fscache_open_file(inode
, filp
);
902 int nfs_release(struct inode
*inode
, struct file
*filp
)
904 nfs_file_clear_open_context(filp
);
909 * This function is called whenever some part of NFS notices that
910 * the cached attributes have to be refreshed.
913 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
915 int status
= -ESTALE
;
916 struct nfs4_label
*label
= NULL
;
917 struct nfs_fattr
*fattr
= NULL
;
918 struct nfs_inode
*nfsi
= NFS_I(inode
);
920 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
921 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
923 trace_nfs_revalidate_inode_enter(inode
);
925 if (is_bad_inode(inode
))
927 if (NFS_STALE(inode
))
931 fattr
= nfs_alloc_fattr();
935 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
937 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
939 status
= PTR_ERR(label
);
943 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
945 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
947 (unsigned long long)NFS_FILEID(inode
), status
);
948 if (status
== -ESTALE
) {
949 nfs_zap_caches(inode
);
950 if (!S_ISDIR(inode
->i_mode
))
951 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
956 status
= nfs_refresh_inode(inode
, fattr
);
958 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
960 (unsigned long long)NFS_FILEID(inode
), status
);
964 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
965 nfs_zap_acl_cache(inode
);
967 nfs_setsecurity(inode
, fattr
, label
);
969 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
971 (unsigned long long)NFS_FILEID(inode
));
974 nfs4_label_free(label
);
976 nfs_free_fattr(fattr
);
977 trace_nfs_revalidate_inode_exit(inode
, status
);
981 int nfs_attribute_timeout(struct inode
*inode
)
983 struct nfs_inode
*nfsi
= NFS_I(inode
);
985 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
988 int nfs_attribute_cache_expired(struct inode
*inode
)
990 if (nfs_have_delegated_attributes(inode
))
992 return nfs_attribute_timeout(inode
);
996 * nfs_revalidate_inode - Revalidate the inode attributes
997 * @server - pointer to nfs_server struct
998 * @inode - pointer to inode struct
1000 * Updates inode attribute information by retrieving the data from the server.
1002 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1004 if (!nfs_need_revalidate_inode(inode
))
1005 return NFS_STALE(inode
) ? -ESTALE
: 0;
1006 return __nfs_revalidate_inode(server
, inode
);
1008 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1010 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1012 if (!(NFS_I(inode
)->cache_validity
&
1013 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1014 && !nfs_attribute_cache_expired(inode
))
1015 return NFS_STALE(inode
) ? -ESTALE
: 0;
1019 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1021 struct nfs_inode
*nfsi
= NFS_I(inode
);
1024 if (mapping
->nrpages
!= 0) {
1025 if (S_ISREG(inode
->i_mode
)) {
1026 ret
= nfs_sync_mapping(mapping
);
1030 ret
= invalidate_inode_pages2(mapping
);
1034 if (S_ISDIR(inode
->i_mode
)) {
1035 spin_lock(&inode
->i_lock
);
1036 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1037 spin_unlock(&inode
->i_lock
);
1039 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1040 nfs_fscache_wait_on_invalidate(inode
);
1042 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1044 (unsigned long long)NFS_FILEID(inode
));
1048 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1050 if (nfs_have_delegated_attributes(inode
))
1052 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1053 || nfs_attribute_timeout(inode
)
1054 || NFS_STALE(inode
);
1058 * nfs_revalidate_mapping - Revalidate the pagecache
1059 * @inode - pointer to host inode
1060 * @mapping - pointer to mapping
1062 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1064 struct nfs_inode
*nfsi
= NFS_I(inode
);
1065 unsigned long *bitlock
= &nfsi
->flags
;
1068 /* swapfiles are not supposed to be shared. */
1069 if (IS_SWAPFILE(inode
))
1072 if (nfs_mapping_need_revalidate_inode(inode
)) {
1073 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1079 * We must clear NFS_INO_INVALID_DATA first to ensure that
1080 * invalidations that come in while we're shooting down the mappings
1081 * are respected. But, that leaves a race window where one revalidator
1082 * can clear the flag, and then another checks it before the mapping
1083 * gets invalidated. Fix that by serializing access to this part of
1086 * At the same time, we need to allow other tasks to see whether we
1087 * might be in the middle of invalidating the pages, so we only set
1088 * the bit lock here if it looks like we're going to be doing that.
1091 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1092 nfs_wait_bit_killable
, TASK_KILLABLE
);
1095 spin_lock(&inode
->i_lock
);
1096 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1097 spin_unlock(&inode
->i_lock
);
1100 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1102 spin_unlock(&inode
->i_lock
);
1106 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1108 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1109 spin_unlock(&inode
->i_lock
);
1110 trace_nfs_invalidate_mapping_enter(inode
);
1111 ret
= nfs_invalidate_mapping(inode
, mapping
);
1112 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1114 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1115 smp_mb__after_atomic();
1116 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1121 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1123 struct nfs_inode
*nfsi
= NFS_I(inode
);
1124 unsigned long ret
= 0;
1126 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1127 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1128 && inode
->i_version
== fattr
->pre_change_attr
) {
1129 inode
->i_version
= fattr
->change_attr
;
1130 if (S_ISDIR(inode
->i_mode
))
1131 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1132 ret
|= NFS_INO_INVALID_ATTR
;
1134 /* If we have atomic WCC data, we may update some attributes */
1135 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1136 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1137 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1138 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1139 ret
|= NFS_INO_INVALID_ATTR
;
1142 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1143 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1144 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1145 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1146 if (S_ISDIR(inode
->i_mode
))
1147 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1148 ret
|= NFS_INO_INVALID_ATTR
;
1150 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1151 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1152 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1153 && nfsi
->nrequests
== 0) {
1154 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1155 ret
|= NFS_INO_INVALID_ATTR
;
1162 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1163 * @inode - pointer to inode
1164 * @fattr - updated attributes
1166 * Verifies the attribute cache. If we have just changed the attributes,
1167 * so that fattr carries weak cache consistency data, then it may
1168 * also update the ctime/mtime/change_attribute.
1170 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1172 struct nfs_inode
*nfsi
= NFS_I(inode
);
1173 loff_t cur_size
, new_isize
;
1174 unsigned long invalid
= 0;
1177 if (nfs_have_delegated_attributes(inode
))
1179 /* Has the inode gone and changed behind our back? */
1180 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1182 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1185 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1186 inode
->i_version
!= fattr
->change_attr
)
1187 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1189 /* Verify a few of the more important attributes */
1190 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1191 invalid
|= NFS_INO_INVALID_ATTR
;
1193 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1194 cur_size
= i_size_read(inode
);
1195 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1196 if (cur_size
!= new_isize
&& nfsi
->nrequests
== 0)
1197 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1200 /* Have any file permissions changed? */
1201 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1202 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1203 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1204 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1205 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1206 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1208 /* Has the link count changed? */
1209 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1210 invalid
|= NFS_INO_INVALID_ATTR
;
1212 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1213 invalid
|= NFS_INO_INVALID_ATIME
;
1216 nfs_set_cache_invalid(inode
, invalid
);
1218 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1222 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1224 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
1226 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
1229 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1231 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
1233 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
1236 static atomic_long_t nfs_attr_generation_counter
;
1238 static unsigned long nfs_read_attr_generation_counter(void)
1240 return atomic_long_read(&nfs_attr_generation_counter
);
1243 unsigned long nfs_inc_attr_generation_counter(void)
1245 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1248 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1251 fattr
->time_start
= jiffies
;
1252 fattr
->gencount
= nfs_inc_attr_generation_counter();
1253 fattr
->owner_name
= NULL
;
1254 fattr
->group_name
= NULL
;
1256 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1258 struct nfs_fattr
*nfs_alloc_fattr(void)
1260 struct nfs_fattr
*fattr
;
1262 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1264 nfs_fattr_init(fattr
);
1267 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1269 struct nfs_fh
*nfs_alloc_fhandle(void)
1273 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1278 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1282 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1283 * in the same way that wireshark does
1287 * For debugging only.
1289 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1291 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1292 * not on the result */
1293 return nfs_fhandle_hash(fh
);
1295 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1298 * _nfs_display_fhandle - display an NFS file handle on the console
1300 * @fh: file handle to display
1301 * @caption: display caption
1303 * For debugging only.
1305 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1309 if (fh
== NULL
|| fh
->size
== 0) {
1310 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1314 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1315 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1316 for (i
= 0; i
< fh
->size
; i
+= 16) {
1317 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1319 switch ((fh
->size
- i
- 1) >> 2) {
1321 printk(KERN_DEFAULT
" %08x\n",
1325 printk(KERN_DEFAULT
" %08x %08x\n",
1326 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1329 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1330 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1331 be32_to_cpup(pos
+ 2));
1334 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1335 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1336 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1340 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1344 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1345 * @inode - pointer to inode
1346 * @fattr - attributes
1348 * Attempt to divine whether or not an RPC call reply carrying stale
1349 * attributes got scheduled after another call carrying updated ones.
1351 * To do so, the function first assumes that a more recent ctime means
1352 * that the attributes in fattr are newer, however it also attempt to
1353 * catch the case where ctime either didn't change, or went backwards
1354 * (if someone reset the clock on the server) by looking at whether
1355 * or not this RPC call was started after the inode was last updated.
1356 * Note also the check for wraparound of 'attr_gencount'
1358 * The function returns 'true' if it thinks the attributes in 'fattr' are
1359 * more recent than the ones cached in the inode.
1362 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1364 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1366 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1367 nfs_ctime_need_update(inode
, fattr
) ||
1368 nfs_size_need_update(inode
, fattr
) ||
1369 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1373 * Don't trust the change_attribute, mtime, ctime or size if
1374 * a pnfs LAYOUTCOMMIT is outstanding
1376 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1377 struct nfs_fattr
*fattr
)
1379 if (pnfs_layoutcommit_outstanding(inode
))
1380 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1381 NFS_ATTR_FATTR_MTIME
|
1382 NFS_ATTR_FATTR_CTIME
|
1383 NFS_ATTR_FATTR_SIZE
);
1386 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1390 trace_nfs_refresh_inode_enter(inode
);
1392 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1394 if (nfs_inode_attrs_need_update(inode
, fattr
))
1395 ret
= nfs_update_inode(inode
, fattr
);
1397 ret
= nfs_check_inode_attributes(inode
, fattr
);
1399 trace_nfs_refresh_inode_exit(inode
, ret
);
1404 * nfs_refresh_inode - try to update the inode attribute cache
1405 * @inode - pointer to inode
1406 * @fattr - updated attributes
1408 * Check that an RPC call that returned attributes has not overlapped with
1409 * other recent updates of the inode metadata, then decide whether it is
1410 * safe to do a full update of the inode attributes, or whether just to
1411 * call nfs_check_inode_attributes.
1413 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1417 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1419 spin_lock(&inode
->i_lock
);
1420 status
= nfs_refresh_inode_locked(inode
, fattr
);
1421 spin_unlock(&inode
->i_lock
);
1425 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1427 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1429 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1431 if (S_ISDIR(inode
->i_mode
))
1432 invalid
|= NFS_INO_INVALID_DATA
;
1433 nfs_set_cache_invalid(inode
, invalid
);
1434 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1436 return nfs_refresh_inode_locked(inode
, fattr
);
1440 * nfs_post_op_update_inode - try to update the inode attribute cache
1441 * @inode - pointer to inode
1442 * @fattr - updated attributes
1444 * After an operation that has changed the inode metadata, mark the
1445 * attribute cache as being invalid, then try to update it.
1447 * NB: if the server didn't return any post op attributes, this
1448 * function will force the retrieval of attributes before the next
1449 * NFS request. Thus it should be used only for operations that
1450 * are expected to change one or more attributes, to avoid
1451 * unnecessary NFS requests and trips through nfs_update_inode().
1453 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1457 spin_lock(&inode
->i_lock
);
1458 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1459 spin_unlock(&inode
->i_lock
);
1463 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1466 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1467 * @inode - pointer to inode
1468 * @fattr - updated attributes
1470 * After an operation that has changed the inode metadata, mark the
1471 * attribute cache as being invalid, then try to update it. Fake up
1472 * weak cache consistency data, if none exist.
1474 * This function is mainly designed to be used by the ->write_done() functions.
1476 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1480 spin_lock(&inode
->i_lock
);
1481 /* Don't do a WCC update if these attributes are already stale */
1482 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1483 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1484 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1485 | NFS_ATTR_FATTR_PRESIZE
1486 | NFS_ATTR_FATTR_PREMTIME
1487 | NFS_ATTR_FATTR_PRECTIME
);
1490 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1491 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1492 fattr
->pre_change_attr
= inode
->i_version
;
1493 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1495 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1496 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1497 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1498 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1500 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1501 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1502 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1503 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1505 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1506 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1507 fattr
->pre_size
= i_size_read(inode
);
1508 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1511 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1512 spin_unlock(&inode
->i_lock
);
1515 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1518 * Many nfs protocol calls return the new file attributes after
1519 * an operation. Here we update the inode to reflect the state
1520 * of the server's inode.
1522 * This is a bit tricky because we have to make sure all dirty pages
1523 * have been sent off to the server before calling invalidate_inode_pages.
1524 * To make sure no other process adds more write requests while we try
1525 * our best to flush them, we make them sleep during the attribute refresh.
1527 * A very similar scenario holds for the dir cache.
1529 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1531 struct nfs_server
*server
;
1532 struct nfs_inode
*nfsi
= NFS_I(inode
);
1533 loff_t cur_isize
, new_isize
;
1534 unsigned long invalid
= 0;
1535 unsigned long now
= jiffies
;
1536 unsigned long save_cache_validity
;
1538 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1539 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1540 nfs_display_fhandle_hash(NFS_FH(inode
)),
1541 atomic_read(&inode
->i_count
), fattr
->valid
);
1543 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
) {
1544 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1545 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1546 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1547 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1548 (long long)fattr
->fileid
);
1553 * Make sure the inode's type hasn't changed.
1555 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1557 * Big trouble! The inode has become a different object.
1559 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1560 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1564 server
= NFS_SERVER(inode
);
1565 /* Update the fsid? */
1566 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1567 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1568 !IS_AUTOMOUNT(inode
))
1569 server
->fsid
= fattr
->fsid
;
1572 * Update the read time so we don't revalidate too often.
1574 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1576 save_cache_validity
= nfsi
->cache_validity
;
1577 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1578 | NFS_INO_INVALID_ATIME
1579 | NFS_INO_REVAL_FORCED
1580 | NFS_INO_REVAL_PAGECACHE
);
1582 /* Do atomic weak cache consistency updates */
1583 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1585 /* More cache consistency checks */
1586 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1587 if (inode
->i_version
!= fattr
->change_attr
) {
1588 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1589 inode
->i_sb
->s_id
, inode
->i_ino
);
1590 invalid
|= NFS_INO_INVALID_ATTR
1591 | NFS_INO_INVALID_DATA
1592 | NFS_INO_INVALID_ACCESS
1593 | NFS_INO_INVALID_ACL
1594 | NFS_INO_REVAL_PAGECACHE
;
1595 if (S_ISDIR(inode
->i_mode
))
1596 nfs_force_lookup_revalidate(inode
);
1597 inode
->i_version
= fattr
->change_attr
;
1599 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1600 nfsi
->cache_validity
|= save_cache_validity
;
1602 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1603 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1604 } else if (server
->caps
& NFS_CAP_MTIME
)
1605 nfsi
->cache_validity
|= save_cache_validity
&
1606 (NFS_INO_INVALID_ATTR
1607 | NFS_INO_REVAL_FORCED
);
1609 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1610 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1611 } else if (server
->caps
& NFS_CAP_CTIME
)
1612 nfsi
->cache_validity
|= save_cache_validity
&
1613 (NFS_INO_INVALID_ATTR
1614 | NFS_INO_REVAL_FORCED
);
1616 /* Check if our cached file size is stale */
1617 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1618 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1619 cur_isize
= i_size_read(inode
);
1620 if (new_isize
!= cur_isize
) {
1621 /* Do we perhaps have any outstanding writes, or has
1622 * the file grown beyond our last write? */
1623 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1624 i_size_write(inode
, new_isize
);
1625 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1626 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1628 dprintk("NFS: isize change on server for file %s/%ld "
1632 (long long)cur_isize
,
1633 (long long)new_isize
);
1636 nfsi
->cache_validity
|= save_cache_validity
&
1637 (NFS_INO_INVALID_ATTR
1638 | NFS_INO_REVAL_PAGECACHE
1639 | NFS_INO_REVAL_FORCED
);
1642 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1643 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1644 else if (server
->caps
& NFS_CAP_ATIME
)
1645 nfsi
->cache_validity
|= save_cache_validity
&
1646 (NFS_INO_INVALID_ATIME
1647 | NFS_INO_REVAL_FORCED
);
1649 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1650 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1651 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1652 newmode
|= fattr
->mode
& S_IALLUGO
;
1653 inode
->i_mode
= newmode
;
1654 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1656 } else if (server
->caps
& NFS_CAP_MODE
)
1657 nfsi
->cache_validity
|= save_cache_validity
&
1658 (NFS_INO_INVALID_ATTR
1659 | NFS_INO_INVALID_ACCESS
1660 | NFS_INO_INVALID_ACL
1661 | NFS_INO_REVAL_FORCED
);
1663 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1664 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1665 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1666 inode
->i_uid
= fattr
->uid
;
1668 } else if (server
->caps
& NFS_CAP_OWNER
)
1669 nfsi
->cache_validity
|= save_cache_validity
&
1670 (NFS_INO_INVALID_ATTR
1671 | NFS_INO_INVALID_ACCESS
1672 | NFS_INO_INVALID_ACL
1673 | NFS_INO_REVAL_FORCED
);
1675 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1676 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1677 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1678 inode
->i_gid
= fattr
->gid
;
1680 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1681 nfsi
->cache_validity
|= save_cache_validity
&
1682 (NFS_INO_INVALID_ATTR
1683 | NFS_INO_INVALID_ACCESS
1684 | NFS_INO_INVALID_ACL
1685 | NFS_INO_REVAL_FORCED
);
1687 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1688 if (inode
->i_nlink
!= fattr
->nlink
) {
1689 invalid
|= NFS_INO_INVALID_ATTR
;
1690 if (S_ISDIR(inode
->i_mode
))
1691 invalid
|= NFS_INO_INVALID_DATA
;
1692 set_nlink(inode
, fattr
->nlink
);
1694 } else if (server
->caps
& NFS_CAP_NLINK
)
1695 nfsi
->cache_validity
|= save_cache_validity
&
1696 (NFS_INO_INVALID_ATTR
1697 | NFS_INO_REVAL_FORCED
);
1699 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1701 * report the blocks in 512byte units
1703 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1705 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1706 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1708 /* Update attrtimeo value if we're out of the unstable period */
1709 if (invalid
& NFS_INO_INVALID_ATTR
) {
1710 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1711 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1712 nfsi
->attrtimeo_timestamp
= now
;
1713 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1715 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1716 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1717 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1718 nfsi
->attrtimeo_timestamp
= now
;
1721 invalid
&= ~NFS_INO_INVALID_ATTR
;
1722 /* Don't invalidate the data if we were to blame */
1723 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1724 || S_ISLNK(inode
->i_mode
)))
1725 invalid
&= ~NFS_INO_INVALID_DATA
;
1726 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1727 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1728 nfs_set_cache_invalid(inode
, invalid
);
1733 * No need to worry about unhashing the dentry, as the
1734 * lookup validation will know that the inode is bad.
1735 * (But we fall through to invalidate the caches.)
1737 nfs_invalidate_inode(inode
);
1741 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1743 struct nfs_inode
*nfsi
;
1744 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1748 nfsi
->cache_validity
= 0UL;
1749 #if IS_ENABLED(CONFIG_NFS_V4)
1750 nfsi
->nfs4_acl
= NULL
;
1751 #endif /* CONFIG_NFS_V4 */
1752 return &nfsi
->vfs_inode
;
1754 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1756 static void nfs_i_callback(struct rcu_head
*head
)
1758 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1759 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1762 void nfs_destroy_inode(struct inode
*inode
)
1764 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1766 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1768 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1770 #if IS_ENABLED(CONFIG_NFS_V4)
1771 INIT_LIST_HEAD(&nfsi
->open_states
);
1772 nfsi
->delegation
= NULL
;
1773 nfsi
->delegation_state
= 0;
1774 init_rwsem(&nfsi
->rwsem
);
1775 nfsi
->layout
= NULL
;
1779 static void init_once(void *foo
)
1781 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1783 inode_init_once(&nfsi
->vfs_inode
);
1784 INIT_LIST_HEAD(&nfsi
->open_files
);
1785 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1786 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1787 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1788 nfsi
->nrequests
= 0;
1789 nfsi
->commit_info
.ncommit
= 0;
1790 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1791 atomic_set(&nfsi
->silly_count
, 1);
1792 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1793 init_waitqueue_head(&nfsi
->waitqueue
);
1794 nfs4_init_once(nfsi
);
1797 static int __init
nfs_init_inodecache(void)
1799 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1800 sizeof(struct nfs_inode
),
1801 0, (SLAB_RECLAIM_ACCOUNT
|
1804 if (nfs_inode_cachep
== NULL
)
1810 static void nfs_destroy_inodecache(void)
1813 * Make sure all delayed rcu free inodes are flushed before we
1817 kmem_cache_destroy(nfs_inode_cachep
);
1820 struct workqueue_struct
*nfsiod_workqueue
;
1821 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1824 * start up the nfsiod workqueue
1826 static int nfsiod_start(void)
1828 struct workqueue_struct
*wq
;
1829 dprintk("RPC: creating workqueue nfsiod\n");
1830 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1833 nfsiod_workqueue
= wq
;
1838 * Destroy the nfsiod workqueue
1840 static void nfsiod_stop(void)
1842 struct workqueue_struct
*wq
;
1844 wq
= nfsiod_workqueue
;
1847 nfsiod_workqueue
= NULL
;
1848 destroy_workqueue(wq
);
1852 EXPORT_SYMBOL_GPL(nfs_net_id
);
1854 static int nfs_net_init(struct net
*net
)
1856 nfs_clients_init(net
);
1857 return nfs_fs_proc_net_init(net
);
1860 static void nfs_net_exit(struct net
*net
)
1862 nfs_fs_proc_net_exit(net
);
1863 nfs_cleanup_cb_ident_idr(net
);
1866 static struct pernet_operations nfs_net_ops
= {
1867 .init
= nfs_net_init
,
1868 .exit
= nfs_net_exit
,
1870 .size
= sizeof(struct nfs_net
),
1876 static int __init
init_nfs_fs(void)
1880 err
= register_pernet_subsys(&nfs_net_ops
);
1884 err
= nfs_fscache_register();
1888 err
= nfsiod_start();
1892 err
= nfs_fs_proc_init();
1896 err
= nfs_init_nfspagecache();
1900 err
= nfs_init_inodecache();
1904 err
= nfs_init_readpagecache();
1908 err
= nfs_init_writepagecache();
1912 err
= nfs_init_directcache();
1916 #ifdef CONFIG_PROC_FS
1917 rpc_proc_register(&init_net
, &nfs_rpcstat
);
1919 if ((err
= register_nfs_fs()) != 0)
1924 #ifdef CONFIG_PROC_FS
1925 rpc_proc_unregister(&init_net
, "nfs");
1927 nfs_destroy_directcache();
1929 nfs_destroy_writepagecache();
1931 nfs_destroy_readpagecache();
1933 nfs_destroy_inodecache();
1935 nfs_destroy_nfspagecache();
1941 nfs_fscache_unregister();
1943 unregister_pernet_subsys(&nfs_net_ops
);
1948 static void __exit
exit_nfs_fs(void)
1950 nfs_destroy_directcache();
1951 nfs_destroy_writepagecache();
1952 nfs_destroy_readpagecache();
1953 nfs_destroy_inodecache();
1954 nfs_destroy_nfspagecache();
1955 nfs_fscache_unregister();
1956 unregister_pernet_subsys(&nfs_net_ops
);
1957 #ifdef CONFIG_PROC_FS
1958 rpc_proc_unregister(&init_net
, "nfs");
1960 unregister_nfs_fs();
1965 /* Not quite true; I just maintain it */
1966 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1967 MODULE_LICENSE("GPL");
1968 module_param(enable_ino64
, bool, 0644);
1970 module_init(init_nfs_fs
)
1971 module_exit(exit_nfs_fs
)