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
);
136 int nfs_sync_inode(struct inode
*inode
)
138 nfs_inode_dio_wait(inode
);
139 return nfs_wb_all(inode
);
141 EXPORT_SYMBOL_GPL(nfs_sync_inode
);
144 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
146 int nfs_sync_mapping(struct address_space
*mapping
)
150 if (mapping
->nrpages
!= 0) {
151 unmap_mapping_range(mapping
, 0, 0, 0);
152 ret
= nfs_wb_all(mapping
->host
);
157 static void nfs_set_cache_invalid(struct inode
*inode
, unsigned long flags
)
159 struct nfs_inode
*nfsi
= NFS_I(inode
);
161 if (inode
->i_mapping
->nrpages
== 0)
162 flags
&= ~NFS_INO_INVALID_DATA
;
163 nfsi
->cache_validity
|= flags
;
164 if (flags
& NFS_INO_INVALID_DATA
)
165 nfs_fscache_invalidate(inode
);
169 * Invalidate the local caches
171 static void nfs_zap_caches_locked(struct inode
*inode
)
173 struct nfs_inode
*nfsi
= NFS_I(inode
);
174 int mode
= inode
->i_mode
;
176 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
178 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
179 nfsi
->attrtimeo_timestamp
= jiffies
;
181 memset(NFS_I(inode
)->cookieverf
, 0, sizeof(NFS_I(inode
)->cookieverf
));
182 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
)) {
183 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
184 | NFS_INO_INVALID_DATA
185 | NFS_INO_INVALID_ACCESS
186 | NFS_INO_INVALID_ACL
187 | NFS_INO_REVAL_PAGECACHE
);
189 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
190 | NFS_INO_INVALID_ACCESS
191 | NFS_INO_INVALID_ACL
192 | NFS_INO_REVAL_PAGECACHE
);
193 nfs_zap_label_cache_locked(nfsi
);
196 void nfs_zap_caches(struct inode
*inode
)
198 spin_lock(&inode
->i_lock
);
199 nfs_zap_caches_locked(inode
);
200 spin_unlock(&inode
->i_lock
);
203 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
205 if (mapping
->nrpages
!= 0) {
206 spin_lock(&inode
->i_lock
);
207 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
208 spin_unlock(&inode
->i_lock
);
212 void nfs_zap_acl_cache(struct inode
*inode
)
214 void (*clear_acl_cache
)(struct inode
*);
216 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
217 if (clear_acl_cache
!= NULL
)
218 clear_acl_cache(inode
);
219 spin_lock(&inode
->i_lock
);
220 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
221 spin_unlock(&inode
->i_lock
);
223 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache
);
225 void nfs_invalidate_atime(struct inode
*inode
)
227 spin_lock(&inode
->i_lock
);
228 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATIME
);
229 spin_unlock(&inode
->i_lock
);
231 EXPORT_SYMBOL_GPL(nfs_invalidate_atime
);
234 * Invalidate, but do not unhash, the inode.
235 * NB: must be called with inode->i_lock held!
237 static void nfs_invalidate_inode(struct inode
*inode
)
239 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
240 nfs_zap_caches_locked(inode
);
243 struct nfs_find_desc
{
245 struct nfs_fattr
*fattr
;
249 * In NFSv3 we can have 64bit inode numbers. In order to support
250 * this, and re-exported directories (also seen in NFSv2)
251 * we are forced to allow 2 different inodes to have the same
255 nfs_find_actor(struct inode
*inode
, void *opaque
)
257 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
258 struct nfs_fh
*fh
= desc
->fh
;
259 struct nfs_fattr
*fattr
= desc
->fattr
;
261 if (NFS_FILEID(inode
) != fattr
->fileid
)
263 if ((S_IFMT
& inode
->i_mode
) != (S_IFMT
& fattr
->mode
))
265 if (nfs_compare_fh(NFS_FH(inode
), fh
))
267 if (is_bad_inode(inode
) || NFS_STALE(inode
))
273 nfs_init_locked(struct inode
*inode
, void *opaque
)
275 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
276 struct nfs_fattr
*fattr
= desc
->fattr
;
278 set_nfs_fileid(inode
, fattr
->fileid
);
279 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
283 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
284 static void nfs_clear_label_invalid(struct inode
*inode
)
286 spin_lock(&inode
->i_lock
);
287 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_LABEL
;
288 spin_unlock(&inode
->i_lock
);
291 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
292 struct nfs4_label
*label
)
299 if ((fattr
->valid
& NFS_ATTR_FATTR_V4_SECURITY_LABEL
) && inode
->i_security
) {
300 error
= security_inode_notifysecctx(inode
, label
->label
,
303 printk(KERN_ERR
"%s() %s %d "
304 "security_inode_notifysecctx() %d\n",
306 (char *)label
->label
,
308 nfs_clear_label_invalid(inode
);
312 struct nfs4_label
*nfs4_label_alloc(struct nfs_server
*server
, gfp_t flags
)
314 struct nfs4_label
*label
= NULL
;
315 int minor_version
= server
->nfs_client
->cl_minorversion
;
317 if (minor_version
< 2)
320 if (!(server
->caps
& NFS_CAP_SECURITY_LABEL
))
323 label
= kzalloc(sizeof(struct nfs4_label
), flags
);
325 return ERR_PTR(-ENOMEM
);
327 label
->label
= kzalloc(NFS4_MAXLABELLEN
, flags
);
328 if (label
->label
== NULL
) {
330 return ERR_PTR(-ENOMEM
);
332 label
->len
= NFS4_MAXLABELLEN
;
336 EXPORT_SYMBOL_GPL(nfs4_label_alloc
);
338 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
339 struct nfs4_label
*label
)
343 EXPORT_SYMBOL_GPL(nfs_setsecurity
);
346 * This is our front-end to iget that looks up inodes by file handle
347 * instead of inode number.
350 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
, struct nfs4_label
*label
)
352 struct nfs_find_desc desc
= {
356 struct inode
*inode
= ERR_PTR(-ENOENT
);
359 nfs_attr_check_mountpoint(sb
, fattr
);
361 if (nfs_attr_use_mounted_on_fileid(fattr
))
362 fattr
->fileid
= fattr
->mounted_on_fileid
;
363 else if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
365 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
368 hash
= nfs_fattr_to_ino_t(fattr
);
370 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
372 inode
= ERR_PTR(-ENOMEM
);
376 if (inode
->i_state
& I_NEW
) {
377 struct nfs_inode
*nfsi
= NFS_I(inode
);
378 unsigned long now
= jiffies
;
380 /* We set i_ino for the few things that still rely on it,
384 /* We can't support update_atime(), since the server will reset it */
385 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
386 inode
->i_mode
= fattr
->mode
;
387 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
388 && nfs_server_capable(inode
, NFS_CAP_MODE
))
389 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
390 /* Why so? Because we want revalidate for devices/FIFOs, and
391 * that's precisely what we have in nfs_file_inode_operations.
393 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
394 if (S_ISREG(inode
->i_mode
)) {
395 inode
->i_fop
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_ops
;
396 inode
->i_data
.a_ops
= &nfs_file_aops
;
397 } else if (S_ISDIR(inode
->i_mode
)) {
398 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
399 inode
->i_fop
= &nfs_dir_operations
;
400 inode
->i_data
.a_ops
= &nfs_dir_aops
;
401 /* Deal with crossing mountpoints */
402 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
403 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
404 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
405 inode
->i_op
= &nfs_referral_inode_operations
;
407 inode
->i_op
= &nfs_mountpoint_inode_operations
;
409 inode
->i_flags
|= S_AUTOMOUNT
;
411 } else if (S_ISLNK(inode
->i_mode
))
412 inode
->i_op
= &nfs_symlink_inode_operations
;
414 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
416 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
417 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
418 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
419 inode
->i_version
= 0;
422 inode
->i_uid
= make_kuid(&init_user_ns
, -2);
423 inode
->i_gid
= make_kgid(&init_user_ns
, -2);
425 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
429 nfsi
->read_cache_jiffies
= fattr
->time_start
;
430 nfsi
->attr_gencount
= fattr
->gencount
;
431 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
432 inode
->i_atime
= fattr
->atime
;
433 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
434 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
435 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
436 inode
->i_mtime
= fattr
->mtime
;
437 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
438 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
439 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
440 inode
->i_ctime
= fattr
->ctime
;
441 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
442 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
443 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
444 inode
->i_version
= fattr
->change_attr
;
445 else if (nfs_server_capable(inode
, NFS_CAP_CHANGE_ATTR
))
446 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
447 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
448 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
450 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
451 | NFS_INO_REVAL_PAGECACHE
);
452 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
453 set_nlink(inode
, fattr
->nlink
);
454 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
455 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
456 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
457 inode
->i_uid
= fattr
->uid
;
458 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
459 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
460 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
461 inode
->i_gid
= fattr
->gid
;
462 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
463 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
464 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
465 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
466 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
468 * report the blocks in 512byte units
470 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
473 nfs_setsecurity(inode
, fattr
, label
);
475 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
476 nfsi
->attrtimeo_timestamp
= now
;
477 nfsi
->access_cache
= RB_ROOT
;
479 nfs_fscache_init_inode(inode
);
481 unlock_new_inode(inode
);
483 nfs_refresh_inode(inode
, fattr
);
484 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
486 (unsigned long long)NFS_FILEID(inode
),
487 nfs_display_fhandle_hash(fh
),
488 atomic_read(&inode
->i_count
));
494 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
497 EXPORT_SYMBOL_GPL(nfs_fhget
);
499 #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)
502 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
504 struct inode
*inode
= d_inode(dentry
);
505 struct nfs_fattr
*fattr
;
508 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
510 /* skip mode change if it's just for clearing setuid/setgid */
511 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
512 attr
->ia_valid
&= ~ATTR_MODE
;
514 if (attr
->ia_valid
& ATTR_SIZE
) {
517 BUG_ON(!S_ISREG(inode
->i_mode
));
519 i_size
= i_size_read(inode
);
520 if (attr
->ia_size
== i_size
)
521 attr
->ia_valid
&= ~ATTR_SIZE
;
522 else if (attr
->ia_size
< i_size
&& IS_SWAPFILE(inode
))
526 /* Optimization: if the end result is no change, don't RPC */
527 attr
->ia_valid
&= NFS_VALID_ATTRS
;
528 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
531 trace_nfs_setattr_enter(inode
);
533 /* Write all dirty data */
534 if (S_ISREG(inode
->i_mode
))
535 nfs_sync_inode(inode
);
537 fattr
= nfs_alloc_fattr();
541 * Return any delegations if we're going to change ACLs
543 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
544 NFS_PROTO(inode
)->return_delegation(inode
);
545 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
547 error
= nfs_refresh_inode(inode
, fattr
);
548 nfs_free_fattr(fattr
);
550 trace_nfs_setattr_exit(inode
, error
);
553 EXPORT_SYMBOL_GPL(nfs_setattr
);
556 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
557 * @inode: inode of the file used
558 * @offset: file offset to start truncating
560 * This is a copy of the common vmtruncate, but with the locking
561 * corrected to take into account the fact that NFS requires
562 * inode->i_size to be updated under the inode->i_lock.
563 * Note: must be called with inode->i_lock held!
565 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
569 err
= inode_newsize_ok(inode
, offset
);
573 i_size_write(inode
, offset
);
576 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
578 spin_unlock(&inode
->i_lock
);
579 truncate_pagecache(inode
, offset
);
580 spin_lock(&inode
->i_lock
);
586 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
587 * @inode: pointer to struct inode
588 * @attr: pointer to struct iattr
590 * Note: we do this in the *proc.c in order to ensure that
591 * it works for things like exclusive creates too.
593 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
,
594 struct nfs_fattr
*fattr
)
596 /* Barrier: bump the attribute generation count. */
597 nfs_fattr_set_barrier(fattr
);
599 spin_lock(&inode
->i_lock
);
600 NFS_I(inode
)->attr_gencount
= fattr
->gencount
;
601 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
602 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
603 int mode
= attr
->ia_mode
& S_IALLUGO
;
604 mode
|= inode
->i_mode
& ~S_IALLUGO
;
605 inode
->i_mode
= mode
;
607 if ((attr
->ia_valid
& ATTR_UID
) != 0)
608 inode
->i_uid
= attr
->ia_uid
;
609 if ((attr
->ia_valid
& ATTR_GID
) != 0)
610 inode
->i_gid
= attr
->ia_gid
;
611 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
612 | NFS_INO_INVALID_ACL
);
614 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
615 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
616 nfs_vmtruncate(inode
, attr
->ia_size
);
618 nfs_update_inode(inode
, fattr
);
619 spin_unlock(&inode
->i_lock
);
621 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
623 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
625 struct dentry
*parent
;
627 parent
= dget_parent(dentry
);
628 nfs_force_use_readdirplus(d_inode(parent
));
632 static bool nfs_need_revalidate_inode(struct inode
*inode
)
634 if (NFS_I(inode
)->cache_validity
&
635 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
637 if (nfs_attribute_cache_expired(inode
))
642 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
644 struct inode
*inode
= d_inode(dentry
);
645 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
648 trace_nfs_getattr_enter(inode
);
649 /* Flush out writes to the server in order to update c/mtime. */
650 if (S_ISREG(inode
->i_mode
)) {
651 mutex_lock(&inode
->i_mutex
);
652 err
= nfs_sync_inode(inode
);
653 mutex_unlock(&inode
->i_mutex
);
659 * We may force a getattr if the user cares about atime.
661 * Note that we only have to check the vfsmount flags here:
662 * - NFS always sets S_NOATIME by so checking it would give a
664 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
665 * no point in checking those.
667 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
668 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
671 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
672 struct nfs_server
*server
= NFS_SERVER(inode
);
674 if (server
->caps
& NFS_CAP_READDIRPLUS
)
675 nfs_request_parent_use_readdirplus(dentry
);
676 err
= __nfs_revalidate_inode(server
, inode
);
679 generic_fillattr(inode
, stat
);
680 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
681 if (S_ISDIR(inode
->i_mode
))
682 stat
->blksize
= NFS_SERVER(inode
)->dtsize
;
685 trace_nfs_getattr_exit(inode
, err
);
688 EXPORT_SYMBOL_GPL(nfs_getattr
);
690 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
692 atomic_set(&l_ctx
->count
, 1);
693 l_ctx
->lockowner
.l_owner
= current
->files
;
694 l_ctx
->lockowner
.l_pid
= current
->tgid
;
695 INIT_LIST_HEAD(&l_ctx
->list
);
696 nfs_iocounter_init(&l_ctx
->io_count
);
699 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
701 struct nfs_lock_context
*head
= &ctx
->lock_context
;
702 struct nfs_lock_context
*pos
= head
;
705 if (pos
->lockowner
.l_owner
!= current
->files
)
707 if (pos
->lockowner
.l_pid
!= current
->tgid
)
709 atomic_inc(&pos
->count
);
711 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
715 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
717 struct nfs_lock_context
*res
, *new = NULL
;
718 struct inode
*inode
= d_inode(ctx
->dentry
);
720 spin_lock(&inode
->i_lock
);
721 res
= __nfs_find_lock_context(ctx
);
723 spin_unlock(&inode
->i_lock
);
724 new = kmalloc(sizeof(*new), GFP_KERNEL
);
726 return ERR_PTR(-ENOMEM
);
727 nfs_init_lock_context(new);
728 spin_lock(&inode
->i_lock
);
729 res
= __nfs_find_lock_context(ctx
);
731 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
732 new->open_context
= ctx
;
737 spin_unlock(&inode
->i_lock
);
741 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
743 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
745 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
746 struct inode
*inode
= d_inode(ctx
->dentry
);
748 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
750 list_del(&l_ctx
->list
);
751 spin_unlock(&inode
->i_lock
);
754 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
757 * nfs_close_context - Common close_context() routine NFSv2/v3
758 * @ctx: pointer to context
759 * @is_sync: is this a synchronous close
761 * always ensure that the attributes are up to date if we're mounted
762 * with close-to-open semantics
764 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
767 struct nfs_server
*server
;
769 if (!(ctx
->mode
& FMODE_WRITE
))
773 inode
= d_inode(ctx
->dentry
);
774 if (!list_empty(&NFS_I(inode
)->open_files
))
776 server
= NFS_SERVER(inode
);
777 if (server
->flags
& NFS_MOUNT_NOCTO
)
779 nfs_revalidate_inode(server
, inode
);
781 EXPORT_SYMBOL_GPL(nfs_close_context
);
783 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
785 struct nfs_open_context
*ctx
;
786 struct rpc_cred
*cred
= rpc_lookup_cred();
788 return ERR_CAST(cred
);
790 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
793 return ERR_PTR(-ENOMEM
);
795 nfs_sb_active(dentry
->d_sb
);
796 ctx
->dentry
= dget(dentry
);
802 nfs_init_lock_context(&ctx
->lock_context
);
803 ctx
->lock_context
.open_context
= ctx
;
804 INIT_LIST_HEAD(&ctx
->list
);
805 ctx
->mdsthreshold
= NULL
;
808 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
810 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
813 atomic_inc(&ctx
->lock_context
.count
);
816 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
818 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
820 struct inode
*inode
= d_inode(ctx
->dentry
);
821 struct super_block
*sb
= ctx
->dentry
->d_sb
;
823 if (!list_empty(&ctx
->list
)) {
824 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
826 list_del(&ctx
->list
);
827 spin_unlock(&inode
->i_lock
);
828 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
831 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
832 if (ctx
->cred
!= NULL
)
833 put_rpccred(ctx
->cred
);
836 kfree(ctx
->mdsthreshold
);
840 void put_nfs_open_context(struct nfs_open_context
*ctx
)
842 __put_nfs_open_context(ctx
, 0);
844 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
847 * Ensure that mmap has a recent RPC credential for use when writing out
850 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
852 struct inode
*inode
= d_inode(ctx
->dentry
);
853 struct nfs_inode
*nfsi
= NFS_I(inode
);
855 spin_lock(&inode
->i_lock
);
856 list_add(&ctx
->list
, &nfsi
->open_files
);
857 spin_unlock(&inode
->i_lock
);
859 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
861 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
863 filp
->private_data
= get_nfs_open_context(ctx
);
864 if (list_empty(&ctx
->list
))
865 nfs_inode_attach_open_context(ctx
);
867 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
870 * Given an inode, search for an open context with the desired characteristics
872 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
874 struct nfs_inode
*nfsi
= NFS_I(inode
);
875 struct nfs_open_context
*pos
, *ctx
= NULL
;
877 spin_lock(&inode
->i_lock
);
878 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
879 if (cred
!= NULL
&& pos
->cred
!= cred
)
881 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
883 ctx
= get_nfs_open_context(pos
);
886 spin_unlock(&inode
->i_lock
);
890 static void nfs_file_clear_open_context(struct file
*filp
)
892 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
895 struct inode
*inode
= d_inode(ctx
->dentry
);
897 filp
->private_data
= NULL
;
898 spin_lock(&inode
->i_lock
);
899 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
900 spin_unlock(&inode
->i_lock
);
901 __put_nfs_open_context(ctx
, filp
->f_flags
& O_DIRECT
? 0 : 1);
906 * These allocate and release file read/write context information.
908 int nfs_open(struct inode
*inode
, struct file
*filp
)
910 struct nfs_open_context
*ctx
;
912 ctx
= alloc_nfs_open_context(filp
->f_path
.dentry
, filp
->f_mode
);
915 nfs_file_set_open_context(filp
, ctx
);
916 put_nfs_open_context(ctx
);
917 nfs_fscache_open_file(inode
, filp
);
921 int nfs_release(struct inode
*inode
, struct file
*filp
)
923 nfs_file_clear_open_context(filp
);
928 * This function is called whenever some part of NFS notices that
929 * the cached attributes have to be refreshed.
932 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
934 int status
= -ESTALE
;
935 struct nfs4_label
*label
= NULL
;
936 struct nfs_fattr
*fattr
= NULL
;
937 struct nfs_inode
*nfsi
= NFS_I(inode
);
939 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
940 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
942 trace_nfs_revalidate_inode_enter(inode
);
944 if (is_bad_inode(inode
))
946 if (NFS_STALE(inode
))
950 fattr
= nfs_alloc_fattr();
954 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
956 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
958 status
= PTR_ERR(label
);
962 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
964 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
966 (unsigned long long)NFS_FILEID(inode
), status
);
967 if (status
== -ESTALE
) {
968 nfs_zap_caches(inode
);
969 if (!S_ISDIR(inode
->i_mode
))
970 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
975 status
= nfs_refresh_inode(inode
, fattr
);
977 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
979 (unsigned long long)NFS_FILEID(inode
), status
);
983 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
984 nfs_zap_acl_cache(inode
);
986 nfs_setsecurity(inode
, fattr
, label
);
988 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
990 (unsigned long long)NFS_FILEID(inode
));
993 nfs4_label_free(label
);
995 nfs_free_fattr(fattr
);
996 trace_nfs_revalidate_inode_exit(inode
, status
);
1000 int nfs_attribute_timeout(struct inode
*inode
)
1002 struct nfs_inode
*nfsi
= NFS_I(inode
);
1004 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
1007 int nfs_attribute_cache_expired(struct inode
*inode
)
1009 if (nfs_have_delegated_attributes(inode
))
1011 return nfs_attribute_timeout(inode
);
1015 * nfs_revalidate_inode - Revalidate the inode attributes
1016 * @server - pointer to nfs_server struct
1017 * @inode - pointer to inode struct
1019 * Updates inode attribute information by retrieving the data from the server.
1021 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1023 if (!nfs_need_revalidate_inode(inode
))
1024 return NFS_STALE(inode
) ? -ESTALE
: 0;
1025 return __nfs_revalidate_inode(server
, inode
);
1027 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1029 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1031 if (!(NFS_I(inode
)->cache_validity
&
1032 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1033 && !nfs_attribute_cache_expired(inode
))
1034 return NFS_STALE(inode
) ? -ESTALE
: 0;
1038 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1040 struct nfs_inode
*nfsi
= NFS_I(inode
);
1043 if (mapping
->nrpages
!= 0) {
1044 if (S_ISREG(inode
->i_mode
)) {
1045 unmap_mapping_range(mapping
, 0, 0, 0);
1046 ret
= nfs_sync_mapping(mapping
);
1050 ret
= invalidate_inode_pages2(mapping
);
1054 if (S_ISDIR(inode
->i_mode
)) {
1055 spin_lock(&inode
->i_lock
);
1056 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1057 spin_unlock(&inode
->i_lock
);
1059 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1060 nfs_fscache_wait_on_invalidate(inode
);
1062 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1064 (unsigned long long)NFS_FILEID(inode
));
1068 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1070 if (nfs_have_delegated_attributes(inode
))
1072 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1073 || nfs_attribute_timeout(inode
)
1074 || NFS_STALE(inode
);
1078 * __nfs_revalidate_mapping - Revalidate the pagecache
1079 * @inode - pointer to host inode
1080 * @mapping - pointer to mapping
1081 * @may_lock - take inode->i_mutex?
1083 static int __nfs_revalidate_mapping(struct inode
*inode
,
1084 struct address_space
*mapping
,
1087 struct nfs_inode
*nfsi
= NFS_I(inode
);
1088 unsigned long *bitlock
= &nfsi
->flags
;
1091 /* swapfiles are not supposed to be shared. */
1092 if (IS_SWAPFILE(inode
))
1095 if (nfs_mapping_need_revalidate_inode(inode
)) {
1096 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1102 * We must clear NFS_INO_INVALID_DATA first to ensure that
1103 * invalidations that come in while we're shooting down the mappings
1104 * are respected. But, that leaves a race window where one revalidator
1105 * can clear the flag, and then another checks it before the mapping
1106 * gets invalidated. Fix that by serializing access to this part of
1109 * At the same time, we need to allow other tasks to see whether we
1110 * might be in the middle of invalidating the pages, so we only set
1111 * the bit lock here if it looks like we're going to be doing that.
1114 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1115 nfs_wait_bit_killable
, TASK_KILLABLE
);
1118 spin_lock(&inode
->i_lock
);
1119 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1120 spin_unlock(&inode
->i_lock
);
1123 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1125 spin_unlock(&inode
->i_lock
);
1129 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1131 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1132 spin_unlock(&inode
->i_lock
);
1133 trace_nfs_invalidate_mapping_enter(inode
);
1135 mutex_lock(&inode
->i_mutex
);
1136 ret
= nfs_invalidate_mapping(inode
, mapping
);
1137 mutex_unlock(&inode
->i_mutex
);
1139 ret
= nfs_invalidate_mapping(inode
, mapping
);
1140 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1142 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1143 smp_mb__after_atomic();
1144 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1150 * nfs_revalidate_mapping - Revalidate the pagecache
1151 * @inode - pointer to host inode
1152 * @mapping - pointer to mapping
1154 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1156 return __nfs_revalidate_mapping(inode
, mapping
, false);
1160 * nfs_revalidate_mapping_protected - Revalidate the pagecache
1161 * @inode - pointer to host inode
1162 * @mapping - pointer to mapping
1164 * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex
1165 * while invalidating the mapping.
1167 int nfs_revalidate_mapping_protected(struct inode
*inode
, struct address_space
*mapping
)
1169 return __nfs_revalidate_mapping(inode
, mapping
, true);
1172 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1174 struct nfs_inode
*nfsi
= NFS_I(inode
);
1175 unsigned long ret
= 0;
1177 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1178 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1179 && inode
->i_version
== fattr
->pre_change_attr
) {
1180 inode
->i_version
= fattr
->change_attr
;
1181 if (S_ISDIR(inode
->i_mode
))
1182 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1183 ret
|= NFS_INO_INVALID_ATTR
;
1185 /* If we have atomic WCC data, we may update some attributes */
1186 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1187 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1188 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1189 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1190 ret
|= NFS_INO_INVALID_ATTR
;
1193 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1194 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1195 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1196 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1197 if (S_ISDIR(inode
->i_mode
))
1198 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1199 ret
|= NFS_INO_INVALID_ATTR
;
1201 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1202 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1203 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1204 && nfsi
->nrequests
== 0) {
1205 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1206 ret
|= NFS_INO_INVALID_ATTR
;
1213 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1214 * @inode - pointer to inode
1215 * @fattr - updated attributes
1217 * Verifies the attribute cache. If we have just changed the attributes,
1218 * so that fattr carries weak cache consistency data, then it may
1219 * also update the ctime/mtime/change_attribute.
1221 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1223 struct nfs_inode
*nfsi
= NFS_I(inode
);
1224 loff_t cur_size
, new_isize
;
1225 unsigned long invalid
= 0;
1228 if (nfs_have_delegated_attributes(inode
))
1230 /* Has the inode gone and changed behind our back? */
1231 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1233 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1236 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1237 inode
->i_version
!= fattr
->change_attr
)
1238 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1240 /* Verify a few of the more important attributes */
1241 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1242 invalid
|= NFS_INO_INVALID_ATTR
;
1244 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1245 cur_size
= i_size_read(inode
);
1246 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1247 if (cur_size
!= new_isize
&& nfsi
->nrequests
== 0)
1248 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1251 /* Have any file permissions changed? */
1252 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1253 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1254 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1255 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1256 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1257 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1259 /* Has the link count changed? */
1260 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1261 invalid
|= NFS_INO_INVALID_ATTR
;
1263 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1264 invalid
|= NFS_INO_INVALID_ATIME
;
1267 nfs_set_cache_invalid(inode
, invalid
);
1269 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1273 static int nfs_ctime_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1275 if (!(fattr
->valid
& NFS_ATTR_FATTR_CTIME
))
1277 return timespec_compare(&fattr
->ctime
, &inode
->i_ctime
) > 0;
1280 static atomic_long_t nfs_attr_generation_counter
;
1282 static unsigned long nfs_read_attr_generation_counter(void)
1284 return atomic_long_read(&nfs_attr_generation_counter
);
1287 unsigned long nfs_inc_attr_generation_counter(void)
1289 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1291 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter
);
1293 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1296 fattr
->time_start
= jiffies
;
1297 fattr
->gencount
= nfs_inc_attr_generation_counter();
1298 fattr
->owner_name
= NULL
;
1299 fattr
->group_name
= NULL
;
1301 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1304 * nfs_fattr_set_barrier
1305 * @fattr: attributes
1307 * Used to set a barrier after an attribute was updated. This
1308 * barrier ensures that older attributes from RPC calls that may
1309 * have raced with our update cannot clobber these new values.
1310 * Note that you are still responsible for ensuring that other
1311 * operations which change the attribute on the server do not
1314 void nfs_fattr_set_barrier(struct nfs_fattr
*fattr
)
1316 fattr
->gencount
= nfs_inc_attr_generation_counter();
1319 struct nfs_fattr
*nfs_alloc_fattr(void)
1321 struct nfs_fattr
*fattr
;
1323 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1325 nfs_fattr_init(fattr
);
1328 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1330 struct nfs_fh
*nfs_alloc_fhandle(void)
1334 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1339 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1343 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1344 * in the same way that wireshark does
1348 * For debugging only.
1350 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1352 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1353 * not on the result */
1354 return nfs_fhandle_hash(fh
);
1356 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1359 * _nfs_display_fhandle - display an NFS file handle on the console
1361 * @fh: file handle to display
1362 * @caption: display caption
1364 * For debugging only.
1366 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1370 if (fh
== NULL
|| fh
->size
== 0) {
1371 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1375 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1376 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1377 for (i
= 0; i
< fh
->size
; i
+= 16) {
1378 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1380 switch ((fh
->size
- i
- 1) >> 2) {
1382 printk(KERN_DEFAULT
" %08x\n",
1386 printk(KERN_DEFAULT
" %08x %08x\n",
1387 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1390 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1391 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1392 be32_to_cpup(pos
+ 2));
1395 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1396 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1397 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1401 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1405 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1406 * @inode - pointer to inode
1407 * @fattr - attributes
1409 * Attempt to divine whether or not an RPC call reply carrying stale
1410 * attributes got scheduled after another call carrying updated ones.
1412 * To do so, the function first assumes that a more recent ctime means
1413 * that the attributes in fattr are newer, however it also attempt to
1414 * catch the case where ctime either didn't change, or went backwards
1415 * (if someone reset the clock on the server) by looking at whether
1416 * or not this RPC call was started after the inode was last updated.
1417 * Note also the check for wraparound of 'attr_gencount'
1419 * The function returns 'true' if it thinks the attributes in 'fattr' are
1420 * more recent than the ones cached in the inode.
1423 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1425 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1427 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1428 nfs_ctime_need_update(inode
, fattr
) ||
1429 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1433 * Don't trust the change_attribute, mtime, ctime or size if
1434 * a pnfs LAYOUTCOMMIT is outstanding
1436 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1437 struct nfs_fattr
*fattr
)
1439 if (pnfs_layoutcommit_outstanding(inode
))
1440 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1441 NFS_ATTR_FATTR_MTIME
|
1442 NFS_ATTR_FATTR_CTIME
|
1443 NFS_ATTR_FATTR_SIZE
);
1446 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1450 trace_nfs_refresh_inode_enter(inode
);
1452 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1454 if (nfs_inode_attrs_need_update(inode
, fattr
))
1455 ret
= nfs_update_inode(inode
, fattr
);
1457 ret
= nfs_check_inode_attributes(inode
, fattr
);
1459 trace_nfs_refresh_inode_exit(inode
, ret
);
1464 * nfs_refresh_inode - try to update the inode attribute cache
1465 * @inode - pointer to inode
1466 * @fattr - updated attributes
1468 * Check that an RPC call that returned attributes has not overlapped with
1469 * other recent updates of the inode metadata, then decide whether it is
1470 * safe to do a full update of the inode attributes, or whether just to
1471 * call nfs_check_inode_attributes.
1473 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1477 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1479 spin_lock(&inode
->i_lock
);
1480 status
= nfs_refresh_inode_locked(inode
, fattr
);
1481 spin_unlock(&inode
->i_lock
);
1485 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1487 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1489 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1491 if (S_ISDIR(inode
->i_mode
))
1492 invalid
|= NFS_INO_INVALID_DATA
;
1493 nfs_set_cache_invalid(inode
, invalid
);
1494 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1496 return nfs_refresh_inode_locked(inode
, fattr
);
1500 * nfs_post_op_update_inode - try to update the inode attribute cache
1501 * @inode - pointer to inode
1502 * @fattr - updated attributes
1504 * After an operation that has changed the inode metadata, mark the
1505 * attribute cache as being invalid, then try to update it.
1507 * NB: if the server didn't return any post op attributes, this
1508 * function will force the retrieval of attributes before the next
1509 * NFS request. Thus it should be used only for operations that
1510 * are expected to change one or more attributes, to avoid
1511 * unnecessary NFS requests and trips through nfs_update_inode().
1513 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1517 spin_lock(&inode
->i_lock
);
1518 nfs_fattr_set_barrier(fattr
);
1519 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1520 spin_unlock(&inode
->i_lock
);
1524 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1527 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1528 * @inode - pointer to inode
1529 * @fattr - updated attributes
1531 * After an operation that has changed the inode metadata, mark the
1532 * attribute cache as being invalid, then try to update it. Fake up
1533 * weak cache consistency data, if none exist.
1535 * This function is mainly designed to be used by the ->write_done() functions.
1537 int nfs_post_op_update_inode_force_wcc_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1541 /* Don't do a WCC update if these attributes are already stale */
1542 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1543 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1544 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1545 | NFS_ATTR_FATTR_PRESIZE
1546 | NFS_ATTR_FATTR_PREMTIME
1547 | NFS_ATTR_FATTR_PRECTIME
);
1550 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1551 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1552 fattr
->pre_change_attr
= inode
->i_version
;
1553 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1555 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1556 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1557 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1558 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1560 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1561 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1562 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1563 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1565 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1566 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1567 fattr
->pre_size
= i_size_read(inode
);
1568 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1571 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1576 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1577 * @inode - pointer to inode
1578 * @fattr - updated attributes
1580 * After an operation that has changed the inode metadata, mark the
1581 * attribute cache as being invalid, then try to update it. Fake up
1582 * weak cache consistency data, if none exist.
1584 * This function is mainly designed to be used by the ->write_done() functions.
1586 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1590 spin_lock(&inode
->i_lock
);
1591 nfs_fattr_set_barrier(fattr
);
1592 status
= nfs_post_op_update_inode_force_wcc_locked(inode
, fattr
);
1593 spin_unlock(&inode
->i_lock
);
1596 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1599 static inline bool nfs_fileid_valid(struct nfs_inode
*nfsi
,
1600 struct nfs_fattr
*fattr
)
1602 bool ret1
= true, ret2
= true;
1604 if (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)
1605 ret1
= (nfsi
->fileid
== fattr
->fileid
);
1606 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
)
1607 ret2
= (nfsi
->fileid
== fattr
->mounted_on_fileid
);
1608 return ret1
|| ret2
;
1612 * Many nfs protocol calls return the new file attributes after
1613 * an operation. Here we update the inode to reflect the state
1614 * of the server's inode.
1616 * This is a bit tricky because we have to make sure all dirty pages
1617 * have been sent off to the server before calling invalidate_inode_pages.
1618 * To make sure no other process adds more write requests while we try
1619 * our best to flush them, we make them sleep during the attribute refresh.
1621 * A very similar scenario holds for the dir cache.
1623 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1625 struct nfs_server
*server
;
1626 struct nfs_inode
*nfsi
= NFS_I(inode
);
1627 loff_t cur_isize
, new_isize
;
1628 unsigned long invalid
= 0;
1629 unsigned long now
= jiffies
;
1630 unsigned long save_cache_validity
;
1632 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1633 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1634 nfs_display_fhandle_hash(NFS_FH(inode
)),
1635 atomic_read(&inode
->i_count
), fattr
->valid
);
1637 if (!nfs_fileid_valid(nfsi
, fattr
)) {
1638 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1639 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1640 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1641 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1642 (long long)fattr
->fileid
);
1647 * Make sure the inode's type hasn't changed.
1649 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1651 * Big trouble! The inode has become a different object.
1653 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1654 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1658 server
= NFS_SERVER(inode
);
1659 /* Update the fsid? */
1660 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1661 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1662 !IS_AUTOMOUNT(inode
))
1663 server
->fsid
= fattr
->fsid
;
1666 * Update the read time so we don't revalidate too often.
1668 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1670 save_cache_validity
= nfsi
->cache_validity
;
1671 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1672 | NFS_INO_INVALID_ATIME
1673 | NFS_INO_REVAL_FORCED
1674 | NFS_INO_REVAL_PAGECACHE
);
1676 /* Do atomic weak cache consistency updates */
1677 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1679 /* More cache consistency checks */
1680 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1681 if (inode
->i_version
!= fattr
->change_attr
) {
1682 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1683 inode
->i_sb
->s_id
, inode
->i_ino
);
1684 invalid
|= NFS_INO_INVALID_ATTR
1685 | NFS_INO_INVALID_DATA
1686 | NFS_INO_INVALID_ACCESS
1687 | NFS_INO_INVALID_ACL
1688 | NFS_INO_REVAL_PAGECACHE
;
1689 if (S_ISDIR(inode
->i_mode
))
1690 nfs_force_lookup_revalidate(inode
);
1691 inode
->i_version
= fattr
->change_attr
;
1693 } else if (server
->caps
& NFS_CAP_CHANGE_ATTR
)
1694 nfsi
->cache_validity
|= save_cache_validity
;
1696 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1697 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1698 } else if (server
->caps
& NFS_CAP_MTIME
)
1699 nfsi
->cache_validity
|= save_cache_validity
&
1700 (NFS_INO_INVALID_ATTR
1701 | NFS_INO_REVAL_FORCED
);
1703 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1704 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1705 } else if (server
->caps
& NFS_CAP_CTIME
)
1706 nfsi
->cache_validity
|= save_cache_validity
&
1707 (NFS_INO_INVALID_ATTR
1708 | NFS_INO_REVAL_FORCED
);
1710 /* Check if our cached file size is stale */
1711 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1712 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1713 cur_isize
= i_size_read(inode
);
1714 if (new_isize
!= cur_isize
) {
1715 /* Do we perhaps have any outstanding writes, or has
1716 * the file grown beyond our last write? */
1717 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1718 i_size_write(inode
, new_isize
);
1719 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1720 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1722 dprintk("NFS: isize change on server for file %s/%ld "
1726 (long long)cur_isize
,
1727 (long long)new_isize
);
1730 nfsi
->cache_validity
|= save_cache_validity
&
1731 (NFS_INO_INVALID_ATTR
1732 | NFS_INO_REVAL_PAGECACHE
1733 | NFS_INO_REVAL_FORCED
);
1736 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1737 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1738 else if (server
->caps
& NFS_CAP_ATIME
)
1739 nfsi
->cache_validity
|= save_cache_validity
&
1740 (NFS_INO_INVALID_ATIME
1741 | NFS_INO_REVAL_FORCED
);
1743 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1744 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1745 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1746 newmode
|= fattr
->mode
& S_IALLUGO
;
1747 inode
->i_mode
= newmode
;
1748 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1750 } else if (server
->caps
& NFS_CAP_MODE
)
1751 nfsi
->cache_validity
|= save_cache_validity
&
1752 (NFS_INO_INVALID_ATTR
1753 | NFS_INO_INVALID_ACCESS
1754 | NFS_INO_INVALID_ACL
1755 | NFS_INO_REVAL_FORCED
);
1757 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1758 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1759 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1760 inode
->i_uid
= fattr
->uid
;
1762 } else if (server
->caps
& NFS_CAP_OWNER
)
1763 nfsi
->cache_validity
|= save_cache_validity
&
1764 (NFS_INO_INVALID_ATTR
1765 | NFS_INO_INVALID_ACCESS
1766 | NFS_INO_INVALID_ACL
1767 | NFS_INO_REVAL_FORCED
);
1769 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1770 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1771 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1772 inode
->i_gid
= fattr
->gid
;
1774 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
)
1775 nfsi
->cache_validity
|= save_cache_validity
&
1776 (NFS_INO_INVALID_ATTR
1777 | NFS_INO_INVALID_ACCESS
1778 | NFS_INO_INVALID_ACL
1779 | NFS_INO_REVAL_FORCED
);
1781 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1782 if (inode
->i_nlink
!= fattr
->nlink
) {
1783 invalid
|= NFS_INO_INVALID_ATTR
;
1784 if (S_ISDIR(inode
->i_mode
))
1785 invalid
|= NFS_INO_INVALID_DATA
;
1786 set_nlink(inode
, fattr
->nlink
);
1788 } else if (server
->caps
& NFS_CAP_NLINK
)
1789 nfsi
->cache_validity
|= save_cache_validity
&
1790 (NFS_INO_INVALID_ATTR
1791 | NFS_INO_REVAL_FORCED
);
1793 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1795 * report the blocks in 512byte units
1797 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1799 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1800 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1802 /* Update attrtimeo value if we're out of the unstable period */
1803 if (invalid
& NFS_INO_INVALID_ATTR
) {
1804 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1805 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1806 nfsi
->attrtimeo_timestamp
= now
;
1807 /* Set barrier to be more recent than all outstanding updates */
1808 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1810 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
, nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1811 if ((nfsi
->attrtimeo
<<= 1) > NFS_MAXATTRTIMEO(inode
))
1812 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1813 nfsi
->attrtimeo_timestamp
= now
;
1815 /* Set the barrier to be more recent than this fattr */
1816 if ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
> 0)
1817 nfsi
->attr_gencount
= fattr
->gencount
;
1819 invalid
&= ~NFS_INO_INVALID_ATTR
;
1820 /* Don't invalidate the data if we were to blame */
1821 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1822 || S_ISLNK(inode
->i_mode
)))
1823 invalid
&= ~NFS_INO_INVALID_DATA
;
1824 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1825 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1826 nfs_set_cache_invalid(inode
, invalid
);
1831 * No need to worry about unhashing the dentry, as the
1832 * lookup validation will know that the inode is bad.
1833 * (But we fall through to invalidate the caches.)
1835 nfs_invalidate_inode(inode
);
1839 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1841 struct nfs_inode
*nfsi
;
1842 nfsi
= kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1846 nfsi
->cache_validity
= 0UL;
1847 #if IS_ENABLED(CONFIG_NFS_V4)
1848 nfsi
->nfs4_acl
= NULL
;
1849 #endif /* CONFIG_NFS_V4 */
1850 return &nfsi
->vfs_inode
;
1852 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1854 static void nfs_i_callback(struct rcu_head
*head
)
1856 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1857 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1860 void nfs_destroy_inode(struct inode
*inode
)
1862 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1864 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1866 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1868 #if IS_ENABLED(CONFIG_NFS_V4)
1869 INIT_LIST_HEAD(&nfsi
->open_states
);
1870 nfsi
->delegation
= NULL
;
1871 init_rwsem(&nfsi
->rwsem
);
1872 nfsi
->layout
= NULL
;
1876 static void init_once(void *foo
)
1878 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1880 inode_init_once(&nfsi
->vfs_inode
);
1881 INIT_LIST_HEAD(&nfsi
->open_files
);
1882 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1883 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1884 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1885 nfsi
->nrequests
= 0;
1886 nfsi
->commit_info
.ncommit
= 0;
1887 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1888 atomic_set(&nfsi
->silly_count
, 1);
1889 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1890 init_waitqueue_head(&nfsi
->waitqueue
);
1891 nfs4_init_once(nfsi
);
1894 static int __init
nfs_init_inodecache(void)
1896 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1897 sizeof(struct nfs_inode
),
1898 0, (SLAB_RECLAIM_ACCOUNT
|
1901 if (nfs_inode_cachep
== NULL
)
1907 static void nfs_destroy_inodecache(void)
1910 * Make sure all delayed rcu free inodes are flushed before we
1914 kmem_cache_destroy(nfs_inode_cachep
);
1917 struct workqueue_struct
*nfsiod_workqueue
;
1918 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1921 * start up the nfsiod workqueue
1923 static int nfsiod_start(void)
1925 struct workqueue_struct
*wq
;
1926 dprintk("RPC: creating workqueue nfsiod\n");
1927 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1930 nfsiod_workqueue
= wq
;
1935 * Destroy the nfsiod workqueue
1937 static void nfsiod_stop(void)
1939 struct workqueue_struct
*wq
;
1941 wq
= nfsiod_workqueue
;
1944 nfsiod_workqueue
= NULL
;
1945 destroy_workqueue(wq
);
1949 EXPORT_SYMBOL_GPL(nfs_net_id
);
1951 static int nfs_net_init(struct net
*net
)
1953 nfs_clients_init(net
);
1954 return nfs_fs_proc_net_init(net
);
1957 static void nfs_net_exit(struct net
*net
)
1959 nfs_fs_proc_net_exit(net
);
1960 nfs_cleanup_cb_ident_idr(net
);
1963 static struct pernet_operations nfs_net_ops
= {
1964 .init
= nfs_net_init
,
1965 .exit
= nfs_net_exit
,
1967 .size
= sizeof(struct nfs_net
),
1973 static int __init
init_nfs_fs(void)
1977 err
= register_pernet_subsys(&nfs_net_ops
);
1981 err
= nfs_fscache_register();
1985 err
= nfsiod_start();
1989 err
= nfs_fs_proc_init();
1993 err
= nfs_init_nfspagecache();
1997 err
= nfs_init_inodecache();
2001 err
= nfs_init_readpagecache();
2005 err
= nfs_init_writepagecache();
2009 err
= nfs_init_directcache();
2013 rpc_proc_register(&init_net
, &nfs_rpcstat
);
2015 err
= register_nfs_fs();
2021 rpc_proc_unregister(&init_net
, "nfs");
2022 nfs_destroy_directcache();
2024 nfs_destroy_writepagecache();
2026 nfs_destroy_readpagecache();
2028 nfs_destroy_inodecache();
2030 nfs_destroy_nfspagecache();
2036 nfs_fscache_unregister();
2038 unregister_pernet_subsys(&nfs_net_ops
);
2043 static void __exit
exit_nfs_fs(void)
2045 nfs_destroy_directcache();
2046 nfs_destroy_writepagecache();
2047 nfs_destroy_readpagecache();
2048 nfs_destroy_inodecache();
2049 nfs_destroy_nfspagecache();
2050 nfs_fscache_unregister();
2051 unregister_pernet_subsys(&nfs_net_ops
);
2052 rpc_proc_unregister(&init_net
, "nfs");
2053 unregister_nfs_fs();
2058 /* Not quite true; I just maintain it */
2059 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2060 MODULE_LICENSE("GPL");
2061 module_param(enable_ino64
, bool, 0644);
2063 module_init(init_nfs_fs
)
2064 module_exit(exit_nfs_fs
)