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
) {
512 BUG_ON(!S_ISREG(inode
->i_mode
));
514 i_size
= i_size_read(inode
);
515 if (attr
->ia_size
== i_size
)
516 attr
->ia_valid
&= ~ATTR_SIZE
;
517 else if (attr
->ia_size
< i_size
&& IS_SWAPFILE(inode
))
521 /* Optimization: if the end result is no change, don't RPC */
522 attr
->ia_valid
&= NFS_VALID_ATTRS
;
523 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
526 trace_nfs_setattr_enter(inode
);
528 /* Write all dirty data */
529 if (S_ISREG(inode
->i_mode
)) {
530 nfs_inode_dio_wait(inode
);
534 fattr
= nfs_alloc_fattr();
538 * Return any delegations if we're going to change ACLs
540 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
541 NFS_PROTO(inode
)->return_delegation(inode
);
542 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
544 error
= nfs_refresh_inode(inode
, fattr
);
545 nfs_free_fattr(fattr
);
547 trace_nfs_setattr_exit(inode
, error
);
550 EXPORT_SYMBOL_GPL(nfs_setattr
);
553 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
554 * @inode: inode of the file used
555 * @offset: file offset to start truncating
557 * This is a copy of the common vmtruncate, but with the locking
558 * corrected to take into account the fact that NFS requires
559 * inode->i_size to be updated under the inode->i_lock.
561 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
565 err
= inode_newsize_ok(inode
, offset
);
569 spin_lock(&inode
->i_lock
);
570 i_size_write(inode
, offset
);
573 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
574 spin_unlock(&inode
->i_lock
);
576 truncate_pagecache(inode
, offset
);
582 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
583 * @inode: pointer to struct inode
584 * @attr: pointer to struct iattr
586 * Note: we do this in the *proc.c in order to ensure that
587 * it works for things like exclusive creates too.
589 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
)
591 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
592 spin_lock(&inode
->i_lock
);
593 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
594 int mode
= attr
->ia_mode
& S_IALLUGO
;
595 mode
|= inode
->i_mode
& ~S_IALLUGO
;
596 inode
->i_mode
= mode
;
598 if ((attr
->ia_valid
& ATTR_UID
) != 0)
599 inode
->i_uid
= attr
->ia_uid
;
600 if ((attr
->ia_valid
& ATTR_GID
) != 0)
601 inode
->i_gid
= attr
->ia_gid
;
602 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
603 | NFS_INO_INVALID_ACL
);
604 spin_unlock(&inode
->i_lock
);
606 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
607 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
608 nfs_vmtruncate(inode
, attr
->ia_size
);
611 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
613 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
615 struct dentry
*parent
;
617 parent
= dget_parent(dentry
);
618 nfs_force_use_readdirplus(parent
->d_inode
);
622 static bool nfs_need_revalidate_inode(struct inode
*inode
)
624 if (NFS_I(inode
)->cache_validity
&
625 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
627 if (nfs_attribute_cache_expired(inode
))
632 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
634 struct inode
*inode
= dentry
->d_inode
;
635 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
638 trace_nfs_getattr_enter(inode
);
639 /* Flush out writes to the server in order to update c/mtime. */
640 if (S_ISREG(inode
->i_mode
)) {
641 nfs_inode_dio_wait(inode
);
642 err
= filemap_write_and_wait(inode
->i_mapping
);
648 * We may force a getattr if the user cares about atime.
650 * Note that we only have to check the vfsmount flags here:
651 * - NFS always sets S_NOATIME by so checking it would give a
653 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
654 * no point in checking those.
656 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
657 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
660 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
661 struct nfs_server
*server
= NFS_SERVER(inode
);
663 if (server
->caps
& NFS_CAP_READDIRPLUS
)
664 nfs_request_parent_use_readdirplus(dentry
);
665 err
= __nfs_revalidate_inode(server
, inode
);
668 generic_fillattr(inode
, stat
);
669 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
672 trace_nfs_getattr_exit(inode
, err
);
675 EXPORT_SYMBOL_GPL(nfs_getattr
);
677 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
679 atomic_set(&l_ctx
->count
, 1);
680 l_ctx
->lockowner
.l_owner
= current
->files
;
681 l_ctx
->lockowner
.l_pid
= current
->tgid
;
682 INIT_LIST_HEAD(&l_ctx
->list
);
683 nfs_iocounter_init(&l_ctx
->io_count
);
686 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
688 struct nfs_lock_context
*head
= &ctx
->lock_context
;
689 struct nfs_lock_context
*pos
= head
;
692 if (pos
->lockowner
.l_owner
!= current
->files
)
694 if (pos
->lockowner
.l_pid
!= current
->tgid
)
696 atomic_inc(&pos
->count
);
698 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
702 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
704 struct nfs_lock_context
*res
, *new = NULL
;
705 struct inode
*inode
= ctx
->dentry
->d_inode
;
707 spin_lock(&inode
->i_lock
);
708 res
= __nfs_find_lock_context(ctx
);
710 spin_unlock(&inode
->i_lock
);
711 new = kmalloc(sizeof(*new), GFP_KERNEL
);
713 return ERR_PTR(-ENOMEM
);
714 nfs_init_lock_context(new);
715 spin_lock(&inode
->i_lock
);
716 res
= __nfs_find_lock_context(ctx
);
718 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
719 new->open_context
= ctx
;
724 spin_unlock(&inode
->i_lock
);
728 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
730 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
732 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
733 struct inode
*inode
= ctx
->dentry
->d_inode
;
735 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
737 list_del(&l_ctx
->list
);
738 spin_unlock(&inode
->i_lock
);
741 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
744 * nfs_close_context - Common close_context() routine NFSv2/v3
745 * @ctx: pointer to context
746 * @is_sync: is this a synchronous close
748 * always ensure that the attributes are up to date if we're mounted
749 * with close-to-open semantics
751 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
754 struct nfs_server
*server
;
756 if (!(ctx
->mode
& FMODE_WRITE
))
760 inode
= ctx
->dentry
->d_inode
;
761 if (!list_empty(&NFS_I(inode
)->open_files
))
763 server
= NFS_SERVER(inode
);
764 if (server
->flags
& NFS_MOUNT_NOCTO
)
766 nfs_revalidate_inode(server
, inode
);
768 EXPORT_SYMBOL_GPL(nfs_close_context
);
770 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
772 struct nfs_open_context
*ctx
;
773 struct rpc_cred
*cred
= rpc_lookup_cred();
775 return ERR_CAST(cred
);
777 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
780 return ERR_PTR(-ENOMEM
);
782 nfs_sb_active(dentry
->d_sb
);
783 ctx
->dentry
= dget(dentry
);
789 nfs_init_lock_context(&ctx
->lock_context
);
790 ctx
->lock_context
.open_context
= ctx
;
791 INIT_LIST_HEAD(&ctx
->list
);
792 ctx
->mdsthreshold
= NULL
;
795 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
797 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
800 atomic_inc(&ctx
->lock_context
.count
);
803 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
805 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
807 struct inode
*inode
= ctx
->dentry
->d_inode
;
808 struct super_block
*sb
= ctx
->dentry
->d_sb
;
810 if (!list_empty(&ctx
->list
)) {
811 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
813 list_del(&ctx
->list
);
814 spin_unlock(&inode
->i_lock
);
815 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
818 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
819 if (ctx
->cred
!= NULL
)
820 put_rpccred(ctx
->cred
);
823 kfree(ctx
->mdsthreshold
);
827 void put_nfs_open_context(struct nfs_open_context
*ctx
)
829 __put_nfs_open_context(ctx
, 0);
831 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
834 * Ensure that mmap has a recent RPC credential for use when writing out
837 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
839 struct inode
*inode
= ctx
->dentry
->d_inode
;
840 struct nfs_inode
*nfsi
= NFS_I(inode
);
842 spin_lock(&inode
->i_lock
);
843 list_add(&ctx
->list
, &nfsi
->open_files
);
844 spin_unlock(&inode
->i_lock
);
846 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
848 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
850 filp
->private_data
= get_nfs_open_context(ctx
);
851 if (list_empty(&ctx
->list
))
852 nfs_inode_attach_open_context(ctx
);
854 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
857 * Given an inode, search for an open context with the desired characteristics
859 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
861 struct nfs_inode
*nfsi
= NFS_I(inode
);
862 struct nfs_open_context
*pos
, *ctx
= NULL
;
864 spin_lock(&inode
->i_lock
);
865 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
866 if (cred
!= NULL
&& pos
->cred
!= cred
)
868 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
870 ctx
= get_nfs_open_context(pos
);
873 spin_unlock(&inode
->i_lock
);
877 static void nfs_file_clear_open_context(struct file
*filp
)
879 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
882 struct inode
*inode
= ctx
->dentry
->d_inode
;
884 filp
->private_data
= NULL
;
885 spin_lock(&inode
->i_lock
);
886 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
887 spin_unlock(&inode
->i_lock
);
888 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
893 * These allocate and release file read/write context information.
895 int nfs_open(struct inode
*inode
, struct file
*filp
)
897 struct nfs_open_context
*ctx
;
899 ctx
= alloc_nfs_open_context(filp
->f_path
.dentry
, filp
->f_mode
);
902 nfs_file_set_open_context(filp
, ctx
);
903 put_nfs_open_context(ctx
);
904 nfs_fscache_open_file(inode
, filp
);
908 int nfs_release(struct inode
*inode
, struct file
*filp
)
910 nfs_file_clear_open_context(filp
);
915 * This function is called whenever some part of NFS notices that
916 * the cached attributes have to be refreshed.
919 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
921 int status
= -ESTALE
;
922 struct nfs4_label
*label
= NULL
;
923 struct nfs_fattr
*fattr
= NULL
;
924 struct nfs_inode
*nfsi
= NFS_I(inode
);
926 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
927 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
929 trace_nfs_revalidate_inode_enter(inode
);
931 if (is_bad_inode(inode
))
933 if (NFS_STALE(inode
))
937 fattr
= nfs_alloc_fattr();
941 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
943 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
945 status
= PTR_ERR(label
);
949 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
951 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
953 (unsigned long long)NFS_FILEID(inode
), status
);
954 if (status
== -ESTALE
) {
955 nfs_zap_caches(inode
);
956 if (!S_ISDIR(inode
->i_mode
))
957 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
962 status
= nfs_refresh_inode(inode
, fattr
);
964 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
966 (unsigned long long)NFS_FILEID(inode
), status
);
970 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
971 nfs_zap_acl_cache(inode
);
973 nfs_setsecurity(inode
, fattr
, label
);
975 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
977 (unsigned long long)NFS_FILEID(inode
));
980 nfs4_label_free(label
);
982 nfs_free_fattr(fattr
);
983 trace_nfs_revalidate_inode_exit(inode
, status
);
987 int nfs_attribute_timeout(struct inode
*inode
)
989 struct nfs_inode
*nfsi
= NFS_I(inode
);
991 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
994 int nfs_attribute_cache_expired(struct inode
*inode
)
996 if (nfs_have_delegated_attributes(inode
))
998 return nfs_attribute_timeout(inode
);
1002 * nfs_revalidate_inode - Revalidate the inode attributes
1003 * @server - pointer to nfs_server struct
1004 * @inode - pointer to inode struct
1006 * Updates inode attribute information by retrieving the data from the server.
1008 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1010 if (!nfs_need_revalidate_inode(inode
))
1011 return NFS_STALE(inode
) ? -ESTALE
: 0;
1012 return __nfs_revalidate_inode(server
, inode
);
1014 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1016 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1018 if (!(NFS_I(inode
)->cache_validity
&
1019 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1020 && !nfs_attribute_cache_expired(inode
))
1021 return NFS_STALE(inode
) ? -ESTALE
: 0;
1025 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1027 struct nfs_inode
*nfsi
= NFS_I(inode
);
1030 if (mapping
->nrpages
!= 0) {
1031 if (S_ISREG(inode
->i_mode
)) {
1032 ret
= nfs_sync_mapping(mapping
);
1036 ret
= invalidate_inode_pages2(mapping
);
1040 if (S_ISDIR(inode
->i_mode
)) {
1041 spin_lock(&inode
->i_lock
);
1042 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1043 spin_unlock(&inode
->i_lock
);
1045 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1046 nfs_fscache_wait_on_invalidate(inode
);
1048 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1050 (unsigned long long)NFS_FILEID(inode
));
1054 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1056 if (nfs_have_delegated_attributes(inode
))
1058 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1059 || nfs_attribute_timeout(inode
)
1060 || NFS_STALE(inode
);
1064 * nfs_revalidate_mapping - Revalidate the pagecache
1065 * @inode - pointer to host inode
1066 * @mapping - pointer to mapping
1068 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1070 struct nfs_inode
*nfsi
= NFS_I(inode
);
1071 unsigned long *bitlock
= &nfsi
->flags
;
1074 /* swapfiles are not supposed to be shared. */
1075 if (IS_SWAPFILE(inode
))
1078 if (nfs_mapping_need_revalidate_inode(inode
)) {
1079 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1085 * We must clear NFS_INO_INVALID_DATA first to ensure that
1086 * invalidations that come in while we're shooting down the mappings
1087 * are respected. But, that leaves a race window where one revalidator
1088 * can clear the flag, and then another checks it before the mapping
1089 * gets invalidated. Fix that by serializing access to this part of
1092 * At the same time, we need to allow other tasks to see whether we
1093 * might be in the middle of invalidating the pages, so we only set
1094 * the bit lock here if it looks like we're going to be doing that.
1097 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1098 nfs_wait_bit_killable
, TASK_KILLABLE
);
1101 spin_lock(&inode
->i_lock
);
1102 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1103 spin_unlock(&inode
->i_lock
);
1106 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1108 spin_unlock(&inode
->i_lock
);
1112 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1114 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1115 spin_unlock(&inode
->i_lock
);
1116 trace_nfs_invalidate_mapping_enter(inode
);
1117 ret
= nfs_invalidate_mapping(inode
, mapping
);
1118 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1120 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1121 smp_mb__after_atomic();
1122 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1127 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1129 struct nfs_inode
*nfsi
= NFS_I(inode
);
1130 unsigned long ret
= 0;
1132 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1133 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1134 && inode
->i_version
== fattr
->pre_change_attr
) {
1135 inode
->i_version
= fattr
->change_attr
;
1136 if (S_ISDIR(inode
->i_mode
))
1137 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1138 ret
|= NFS_INO_INVALID_ATTR
;
1140 /* If we have atomic WCC data, we may update some attributes */
1141 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1142 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1143 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1144 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1145 ret
|= NFS_INO_INVALID_ATTR
;
1148 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1149 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1150 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1151 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1152 if (S_ISDIR(inode
->i_mode
))
1153 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1154 ret
|= NFS_INO_INVALID_ATTR
;
1156 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1157 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1158 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1159 && nfsi
->nrequests
== 0) {
1160 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1161 ret
|= NFS_INO_INVALID_ATTR
;
1168 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1169 * @inode - pointer to inode
1170 * @fattr - updated attributes
1172 * Verifies the attribute cache. If we have just changed the attributes,
1173 * so that fattr carries weak cache consistency data, then it may
1174 * also update the ctime/mtime/change_attribute.
1176 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1178 struct nfs_inode
*nfsi
= NFS_I(inode
);
1179 loff_t cur_size
, new_isize
;
1180 unsigned long invalid
= 0;
1183 if (nfs_have_delegated_attributes(inode
))
1185 /* Has the inode gone and changed behind our back? */
1186 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1188 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1191 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1192 inode
->i_version
!= fattr
->change_attr
)
1193 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1195 /* Verify a few of the more important attributes */
1196 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1197 invalid
|= NFS_INO_INVALID_ATTR
;
1199 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1200 cur_size
= i_size_read(inode
);
1201 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1202 if (cur_size
!= new_isize
&& nfsi
->nrequests
== 0)
1203 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1206 /* Have any file permissions changed? */
1207 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1208 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1209 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1210 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1211 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1212 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1214 /* Has the link count changed? */
1215 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1216 invalid
|= NFS_INO_INVALID_ATTR
;
1218 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1219 invalid
|= NFS_INO_INVALID_ATIME
;
1222 nfs_set_cache_invalid(inode
, invalid
);
1224 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1228 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1230 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
1232 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
1235 static int nfs_size_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1237 if (!(fattr
->valid
& NFS_ATTR_FATTR_SIZE
))
1239 return nfs_size_to_loff_t(fattr
->size
) > i_size_read(inode
);
1242 static atomic_long_t nfs_attr_generation_counter
;
1244 static unsigned long nfs_read_attr_generation_counter(void)
1246 return atomic_long_read(&nfs_attr_generation_counter
);
1249 unsigned long nfs_inc_attr_generation_counter(void)
1251 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1254 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1257 fattr
->time_start
= jiffies
;
1258 fattr
->gencount
= nfs_inc_attr_generation_counter();
1259 fattr
->owner_name
= NULL
;
1260 fattr
->group_name
= NULL
;
1262 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1264 struct nfs_fattr
*nfs_alloc_fattr(void)
1266 struct nfs_fattr
*fattr
;
1268 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1270 nfs_fattr_init(fattr
);
1273 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1275 struct nfs_fh
*nfs_alloc_fhandle(void)
1279 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1284 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1288 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1289 * in the same way that wireshark does
1293 * For debugging only.
1295 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1297 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1298 * not on the result */
1299 return nfs_fhandle_hash(fh
);
1301 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1304 * _nfs_display_fhandle - display an NFS file handle on the console
1306 * @fh: file handle to display
1307 * @caption: display caption
1309 * For debugging only.
1311 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1315 if (fh
== NULL
|| fh
->size
== 0) {
1316 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1320 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1321 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1322 for (i
= 0; i
< fh
->size
; i
+= 16) {
1323 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1325 switch ((fh
->size
- i
- 1) >> 2) {
1327 printk(KERN_DEFAULT
" %08x\n",
1331 printk(KERN_DEFAULT
" %08x %08x\n",
1332 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1335 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1336 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1337 be32_to_cpup(pos
+ 2));
1340 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1341 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1342 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1346 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1350 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1351 * @inode - pointer to inode
1352 * @fattr - attributes
1354 * Attempt to divine whether or not an RPC call reply carrying stale
1355 * attributes got scheduled after another call carrying updated ones.
1357 * To do so, the function first assumes that a more recent ctime means
1358 * that the attributes in fattr are newer, however it also attempt to
1359 * catch the case where ctime either didn't change, or went backwards
1360 * (if someone reset the clock on the server) by looking at whether
1361 * or not this RPC call was started after the inode was last updated.
1362 * Note also the check for wraparound of 'attr_gencount'
1364 * The function returns 'true' if it thinks the attributes in 'fattr' are
1365 * more recent than the ones cached in the inode.
1368 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1370 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1372 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1373 nfs_ctime_need_update(inode
, fattr
) ||
1374 nfs_size_need_update(inode
, fattr
) ||
1375 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1379 * Don't trust the change_attribute, mtime, ctime or size if
1380 * a pnfs LAYOUTCOMMIT is outstanding
1382 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1383 struct nfs_fattr
*fattr
)
1385 if (pnfs_layoutcommit_outstanding(inode
))
1386 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1387 NFS_ATTR_FATTR_MTIME
|
1388 NFS_ATTR_FATTR_CTIME
|
1389 NFS_ATTR_FATTR_SIZE
);
1392 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1396 trace_nfs_refresh_inode_enter(inode
);
1398 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1400 if (nfs_inode_attrs_need_update(inode
, fattr
))
1401 ret
= nfs_update_inode(inode
, fattr
);
1403 ret
= nfs_check_inode_attributes(inode
, fattr
);
1405 trace_nfs_refresh_inode_exit(inode
, ret
);
1410 * nfs_refresh_inode - try to update the inode attribute cache
1411 * @inode - pointer to inode
1412 * @fattr - updated attributes
1414 * Check that an RPC call that returned attributes has not overlapped with
1415 * other recent updates of the inode metadata, then decide whether it is
1416 * safe to do a full update of the inode attributes, or whether just to
1417 * call nfs_check_inode_attributes.
1419 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1423 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1425 spin_lock(&inode
->i_lock
);
1426 status
= nfs_refresh_inode_locked(inode
, fattr
);
1427 spin_unlock(&inode
->i_lock
);
1431 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1433 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1435 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1437 if (S_ISDIR(inode
->i_mode
))
1438 invalid
|= NFS_INO_INVALID_DATA
;
1439 nfs_set_cache_invalid(inode
, invalid
);
1440 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1442 return nfs_refresh_inode_locked(inode
, fattr
);
1446 * nfs_post_op_update_inode - try to update the inode attribute cache
1447 * @inode - pointer to inode
1448 * @fattr - updated attributes
1450 * After an operation that has changed the inode metadata, mark the
1451 * attribute cache as being invalid, then try to update it.
1453 * NB: if the server didn't return any post op attributes, this
1454 * function will force the retrieval of attributes before the next
1455 * NFS request. Thus it should be used only for operations that
1456 * are expected to change one or more attributes, to avoid
1457 * unnecessary NFS requests and trips through nfs_update_inode().
1459 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1463 spin_lock(&inode
->i_lock
);
1464 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1465 spin_unlock(&inode
->i_lock
);
1469 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1472 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1473 * @inode - pointer to inode
1474 * @fattr - updated attributes
1476 * After an operation that has changed the inode metadata, mark the
1477 * attribute cache as being invalid, then try to update it. Fake up
1478 * weak cache consistency data, if none exist.
1480 * This function is mainly designed to be used by the ->write_done() functions.
1482 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1486 spin_lock(&inode
->i_lock
);
1487 /* Don't do a WCC update if these attributes are already stale */
1488 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1489 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1490 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1491 | NFS_ATTR_FATTR_PRESIZE
1492 | NFS_ATTR_FATTR_PREMTIME
1493 | NFS_ATTR_FATTR_PRECTIME
);
1496 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1497 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1498 fattr
->pre_change_attr
= inode
->i_version
;
1499 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1501 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1502 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1503 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1504 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1506 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1507 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1508 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1509 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1511 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1512 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1513 fattr
->pre_size
= i_size_read(inode
);
1514 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1517 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1518 spin_unlock(&inode
->i_lock
);
1521 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1524 * Many nfs protocol calls return the new file attributes after
1525 * an operation. Here we update the inode to reflect the state
1526 * of the server's inode.
1528 * This is a bit tricky because we have to make sure all dirty pages
1529 * have been sent off to the server before calling invalidate_inode_pages.
1530 * To make sure no other process adds more write requests while we try
1531 * our best to flush them, we make them sleep during the attribute refresh.
1533 * A very similar scenario holds for the dir cache.
1535 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1537 struct nfs_server
*server
;
1538 struct nfs_inode
*nfsi
= NFS_I(inode
);
1539 loff_t cur_isize
, new_isize
;
1540 unsigned long invalid
= 0;
1541 unsigned long now
= jiffies
;
1542 unsigned long save_cache_validity
;
1544 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1545 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1546 nfs_display_fhandle_hash(NFS_FH(inode
)),
1547 atomic_read(&inode
->i_count
), fattr
->valid
);
1549 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
) {
1550 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1551 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1552 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1553 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1554 (long long)fattr
->fileid
);
1559 * Make sure the inode's type hasn't changed.
1561 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1563 * Big trouble! The inode has become a different object.
1565 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1566 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1570 server
= NFS_SERVER(inode
);
1571 /* Update the fsid? */
1572 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1573 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1574 !IS_AUTOMOUNT(inode
))
1575 server
->fsid
= fattr
->fsid
;
1578 * Update the read time so we don't revalidate too often.
1580 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1582 save_cache_validity
= nfsi
->cache_validity
;
1583 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1584 | NFS_INO_INVALID_ATIME
1585 | NFS_INO_REVAL_FORCED
1586 | NFS_INO_REVAL_PAGECACHE
);
1588 /* Do atomic weak cache consistency updates */
1589 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1591 /* More cache consistency checks */
1592 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1593 if (inode
->i_version
!= fattr
->change_attr
) {
1594 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1595 inode
->i_sb
->s_id
, inode
->i_ino
);
1596 invalid
|= NFS_INO_INVALID_ATTR
1597 | NFS_INO_INVALID_DATA
1598 | NFS_INO_INVALID_ACCESS
1599 | NFS_INO_INVALID_ACL
1600 | NFS_INO_REVAL_PAGECACHE
;
1601 if (S_ISDIR(inode
->i_mode
))
1602 nfs_force_lookup_revalidate(inode
);
1603 inode
->i_version
= fattr
->change_attr
;
1605 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1606 nfsi
->cache_validity
|= save_cache_validity
;
1608 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1609 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1610 } else if (server
->caps
& NFS_CAP_MTIME
)
1611 nfsi
->cache_validity
|= save_cache_validity
&
1612 (NFS_INO_INVALID_ATTR
1613 | NFS_INO_REVAL_FORCED
);
1615 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1616 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1617 } else if (server
->caps
& NFS_CAP_CTIME
)
1618 nfsi
->cache_validity
|= save_cache_validity
&
1619 (NFS_INO_INVALID_ATTR
1620 | NFS_INO_REVAL_FORCED
);
1622 /* Check if our cached file size is stale */
1623 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1624 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1625 cur_isize
= i_size_read(inode
);
1626 if (new_isize
!= cur_isize
) {
1627 /* Do we perhaps have any outstanding writes, or has
1628 * the file grown beyond our last write? */
1629 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1630 i_size_write(inode
, new_isize
);
1631 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1632 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1634 dprintk("NFS: isize change on server for file %s/%ld "
1638 (long long)cur_isize
,
1639 (long long)new_isize
);
1642 nfsi
->cache_validity
|= save_cache_validity
&
1643 (NFS_INO_INVALID_ATTR
1644 | NFS_INO_REVAL_PAGECACHE
1645 | NFS_INO_REVAL_FORCED
);
1648 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1649 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1650 else if (server
->caps
& NFS_CAP_ATIME
)
1651 nfsi
->cache_validity
|= save_cache_validity
&
1652 (NFS_INO_INVALID_ATIME
1653 | NFS_INO_REVAL_FORCED
);
1655 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1656 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1657 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1658 newmode
|= fattr
->mode
& S_IALLUGO
;
1659 inode
->i_mode
= newmode
;
1660 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1662 } else if (server
->caps
& NFS_CAP_MODE
)
1663 nfsi
->cache_validity
|= save_cache_validity
&
1664 (NFS_INO_INVALID_ATTR
1665 | NFS_INO_INVALID_ACCESS
1666 | NFS_INO_INVALID_ACL
1667 | NFS_INO_REVAL_FORCED
);
1669 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1670 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1671 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1672 inode
->i_uid
= fattr
->uid
;
1674 } else if (server
->caps
& NFS_CAP_OWNER
)
1675 nfsi
->cache_validity
|= save_cache_validity
&
1676 (NFS_INO_INVALID_ATTR
1677 | NFS_INO_INVALID_ACCESS
1678 | NFS_INO_INVALID_ACL
1679 | NFS_INO_REVAL_FORCED
);
1681 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1682 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1683 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1684 inode
->i_gid
= fattr
->gid
;
1686 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1687 nfsi
->cache_validity
|= save_cache_validity
&
1688 (NFS_INO_INVALID_ATTR
1689 | NFS_INO_INVALID_ACCESS
1690 | NFS_INO_INVALID_ACL
1691 | NFS_INO_REVAL_FORCED
);
1693 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1694 if (inode
->i_nlink
!= fattr
->nlink
) {
1695 invalid
|= NFS_INO_INVALID_ATTR
;
1696 if (S_ISDIR(inode
->i_mode
))
1697 invalid
|= NFS_INO_INVALID_DATA
;
1698 set_nlink(inode
, fattr
->nlink
);
1700 } else if (server
->caps
& NFS_CAP_NLINK
)
1701 nfsi
->cache_validity
|= save_cache_validity
&
1702 (NFS_INO_INVALID_ATTR
1703 | NFS_INO_REVAL_FORCED
);
1705 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1707 * report the blocks in 512byte units
1709 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1711 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1712 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1714 /* Update attrtimeo value if we're out of the unstable period */
1715 if (invalid
& NFS_INO_INVALID_ATTR
) {
1716 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1717 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1718 nfsi
->attrtimeo_timestamp
= now
;
1719 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1721 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1722 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1723 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1724 nfsi
->attrtimeo_timestamp
= now
;
1727 invalid
&= ~NFS_INO_INVALID_ATTR
;
1728 /* Don't invalidate the data if we were to blame */
1729 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1730 || S_ISLNK(inode
->i_mode
)))
1731 invalid
&= ~NFS_INO_INVALID_DATA
;
1732 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1733 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1734 nfs_set_cache_invalid(inode
, invalid
);
1739 * No need to worry about unhashing the dentry, as the
1740 * lookup validation will know that the inode is bad.
1741 * (But we fall through to invalidate the caches.)
1743 nfs_invalidate_inode(inode
);
1747 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1749 struct nfs_inode
*nfsi
;
1750 nfsi
= (struct nfs_inode
*)kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1754 nfsi
->cache_validity
= 0UL;
1755 #if IS_ENABLED(CONFIG_NFS_V4)
1756 nfsi
->nfs4_acl
= NULL
;
1757 #endif /* CONFIG_NFS_V4 */
1758 return &nfsi
->vfs_inode
;
1760 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1762 static void nfs_i_callback(struct rcu_head
*head
)
1764 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1765 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1768 void nfs_destroy_inode(struct inode
*inode
)
1770 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1772 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1774 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1776 #if IS_ENABLED(CONFIG_NFS_V4)
1777 INIT_LIST_HEAD(&nfsi
->open_states
);
1778 nfsi
->delegation
= NULL
;
1779 nfsi
->delegation_state
= 0;
1780 init_rwsem(&nfsi
->rwsem
);
1781 nfsi
->layout
= NULL
;
1785 static void init_once(void *foo
)
1787 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1789 inode_init_once(&nfsi
->vfs_inode
);
1790 INIT_LIST_HEAD(&nfsi
->open_files
);
1791 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1792 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1793 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1794 nfsi
->nrequests
= 0;
1795 nfsi
->commit_info
.ncommit
= 0;
1796 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1797 atomic_set(&nfsi
->silly_count
, 1);
1798 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1799 init_waitqueue_head(&nfsi
->waitqueue
);
1800 nfs4_init_once(nfsi
);
1803 static int __init
nfs_init_inodecache(void)
1805 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1806 sizeof(struct nfs_inode
),
1807 0, (SLAB_RECLAIM_ACCOUNT
|
1810 if (nfs_inode_cachep
== NULL
)
1816 static void nfs_destroy_inodecache(void)
1819 * Make sure all delayed rcu free inodes are flushed before we
1823 kmem_cache_destroy(nfs_inode_cachep
);
1826 struct workqueue_struct
*nfsiod_workqueue
;
1827 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1830 * start up the nfsiod workqueue
1832 static int nfsiod_start(void)
1834 struct workqueue_struct
*wq
;
1835 dprintk("RPC: creating workqueue nfsiod\n");
1836 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1839 nfsiod_workqueue
= wq
;
1844 * Destroy the nfsiod workqueue
1846 static void nfsiod_stop(void)
1848 struct workqueue_struct
*wq
;
1850 wq
= nfsiod_workqueue
;
1853 nfsiod_workqueue
= NULL
;
1854 destroy_workqueue(wq
);
1858 EXPORT_SYMBOL_GPL(nfs_net_id
);
1860 static int nfs_net_init(struct net
*net
)
1862 nfs_clients_init(net
);
1863 return nfs_fs_proc_net_init(net
);
1866 static void nfs_net_exit(struct net
*net
)
1868 nfs_fs_proc_net_exit(net
);
1869 nfs_cleanup_cb_ident_idr(net
);
1872 static struct pernet_operations nfs_net_ops
= {
1873 .init
= nfs_net_init
,
1874 .exit
= nfs_net_exit
,
1876 .size
= sizeof(struct nfs_net
),
1882 static int __init
init_nfs_fs(void)
1886 err
= register_pernet_subsys(&nfs_net_ops
);
1890 err
= nfs_fscache_register();
1894 err
= nfsiod_start();
1898 err
= nfs_fs_proc_init();
1902 err
= nfs_init_nfspagecache();
1906 err
= nfs_init_inodecache();
1910 err
= nfs_init_readpagecache();
1914 err
= nfs_init_writepagecache();
1918 err
= nfs_init_directcache();
1922 #ifdef CONFIG_PROC_FS
1923 rpc_proc_register(&init_net
, &nfs_rpcstat
);
1925 if ((err
= register_nfs_fs()) != 0)
1930 #ifdef CONFIG_PROC_FS
1931 rpc_proc_unregister(&init_net
, "nfs");
1933 nfs_destroy_directcache();
1935 nfs_destroy_writepagecache();
1937 nfs_destroy_readpagecache();
1939 nfs_destroy_inodecache();
1941 nfs_destroy_nfspagecache();
1947 nfs_fscache_unregister();
1949 unregister_pernet_subsys(&nfs_net_ops
);
1954 static void __exit
exit_nfs_fs(void)
1956 nfs_destroy_directcache();
1957 nfs_destroy_writepagecache();
1958 nfs_destroy_readpagecache();
1959 nfs_destroy_inodecache();
1960 nfs_destroy_nfspagecache();
1961 nfs_fscache_unregister();
1962 unregister_pernet_subsys(&nfs_net_ops
);
1963 #ifdef CONFIG_PROC_FS
1964 rpc_proc_unregister(&init_net
, "nfs");
1966 unregister_nfs_fs();
1971 /* Not quite true; I just maintain it */
1972 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
1973 MODULE_LICENSE("GPL");
1974 module_param(enable_ino64
, bool, 0644);
1976 module_init(init_nfs_fs
)
1977 module_exit(exit_nfs_fs
)