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
, int mode
)
80 freezable_schedule_unsafe();
81 if (signal_pending_state(mode
, current
))
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
;
446 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
447 | NFS_INO_REVAL_PAGECACHE
);
448 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
449 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
451 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
452 | NFS_INO_REVAL_PAGECACHE
);
453 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
454 set_nlink(inode
, fattr
->nlink
);
455 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
456 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
457 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
458 inode
->i_uid
= fattr
->uid
;
459 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
460 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
461 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
462 inode
->i_gid
= fattr
->gid
;
463 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
464 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
465 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
466 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
467 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
469 * report the blocks in 512byte units
471 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
474 nfs_setsecurity(inode
, fattr
, label
);
476 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
477 nfsi
->attrtimeo_timestamp
= now
;
478 nfsi
->access_cache
= RB_ROOT
;
480 nfs_fscache_init_inode(inode
);
482 unlock_new_inode(inode
);
484 nfs_refresh_inode(inode
, fattr
);
485 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
487 (unsigned long long)NFS_FILEID(inode
),
488 nfs_display_fhandle_hash(fh
),
489 atomic_read(&inode
->i_count
));
495 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
498 EXPORT_SYMBOL_GPL(nfs_fhget
);
500 #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)
503 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
505 struct inode
*inode
= d_inode(dentry
);
506 struct nfs_fattr
*fattr
;
509 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
511 /* skip mode change if it's just for clearing setuid/setgid */
512 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
513 attr
->ia_valid
&= ~ATTR_MODE
;
515 if (attr
->ia_valid
& ATTR_SIZE
) {
516 BUG_ON(!S_ISREG(inode
->i_mode
));
518 error
= inode_newsize_ok(inode
, attr
->ia_size
);
522 if (attr
->ia_size
== i_size_read(inode
))
523 attr
->ia_valid
&= ~ATTR_SIZE
;
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();
544 * Return any delegations if we're going to change ACLs
546 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
547 NFS_PROTO(inode
)->return_delegation(inode
);
548 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
550 error
= nfs_refresh_inode(inode
, fattr
);
551 nfs_free_fattr(fattr
);
553 trace_nfs_setattr_exit(inode
, error
);
556 EXPORT_SYMBOL_GPL(nfs_setattr
);
559 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
560 * @inode: inode of the file used
561 * @offset: file offset to start truncating
563 * This is a copy of the common vmtruncate, but with the locking
564 * corrected to take into account the fact that NFS requires
565 * inode->i_size to be updated under the inode->i_lock.
566 * Note: must be called with inode->i_lock held!
568 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
572 err
= inode_newsize_ok(inode
, offset
);
576 i_size_write(inode
, offset
);
579 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
581 spin_unlock(&inode
->i_lock
);
582 truncate_pagecache(inode
, offset
);
583 spin_lock(&inode
->i_lock
);
589 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
590 * @inode: pointer to struct inode
591 * @attr: pointer to struct iattr
593 * Note: we do this in the *proc.c in order to ensure that
594 * it works for things like exclusive creates too.
596 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
,
597 struct nfs_fattr
*fattr
)
599 /* Barrier: bump the attribute generation count. */
600 nfs_fattr_set_barrier(fattr
);
602 spin_lock(&inode
->i_lock
);
603 NFS_I(inode
)->attr_gencount
= fattr
->gencount
;
604 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
605 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
606 int mode
= attr
->ia_mode
& S_IALLUGO
;
607 mode
|= inode
->i_mode
& ~S_IALLUGO
;
608 inode
->i_mode
= mode
;
610 if ((attr
->ia_valid
& ATTR_UID
) != 0)
611 inode
->i_uid
= attr
->ia_uid
;
612 if ((attr
->ia_valid
& ATTR_GID
) != 0)
613 inode
->i_gid
= attr
->ia_gid
;
614 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
615 | NFS_INO_INVALID_ACL
);
617 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
618 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
619 nfs_vmtruncate(inode
, attr
->ia_size
);
622 nfs_update_inode(inode
, fattr
);
624 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATTR
;
625 spin_unlock(&inode
->i_lock
);
627 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
629 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
631 struct dentry
*parent
;
633 parent
= dget_parent(dentry
);
634 nfs_force_use_readdirplus(d_inode(parent
));
638 static bool nfs_need_revalidate_inode(struct inode
*inode
)
640 if (NFS_I(inode
)->cache_validity
&
641 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
643 if (nfs_attribute_cache_expired(inode
))
648 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
650 struct inode
*inode
= d_inode(dentry
);
651 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
654 trace_nfs_getattr_enter(inode
);
655 /* Flush out writes to the server in order to update c/mtime. */
656 if (S_ISREG(inode
->i_mode
)) {
657 mutex_lock(&inode
->i_mutex
);
658 err
= nfs_sync_inode(inode
);
659 mutex_unlock(&inode
->i_mutex
);
665 * We may force a getattr if the user cares about atime.
667 * Note that we only have to check the vfsmount flags here:
668 * - NFS always sets S_NOATIME by so checking it would give a
670 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
671 * no point in checking those.
673 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
674 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
677 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
678 struct nfs_server
*server
= NFS_SERVER(inode
);
680 if (server
->caps
& NFS_CAP_READDIRPLUS
)
681 nfs_request_parent_use_readdirplus(dentry
);
682 err
= __nfs_revalidate_inode(server
, inode
);
685 generic_fillattr(inode
, stat
);
686 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
687 if (S_ISDIR(inode
->i_mode
))
688 stat
->blksize
= NFS_SERVER(inode
)->dtsize
;
691 trace_nfs_getattr_exit(inode
, err
);
694 EXPORT_SYMBOL_GPL(nfs_getattr
);
696 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
698 atomic_set(&l_ctx
->count
, 1);
699 l_ctx
->lockowner
.l_owner
= current
->files
;
700 l_ctx
->lockowner
.l_pid
= current
->tgid
;
701 INIT_LIST_HEAD(&l_ctx
->list
);
702 nfs_iocounter_init(&l_ctx
->io_count
);
705 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
707 struct nfs_lock_context
*head
= &ctx
->lock_context
;
708 struct nfs_lock_context
*pos
= head
;
711 if (pos
->lockowner
.l_owner
!= current
->files
)
713 if (pos
->lockowner
.l_pid
!= current
->tgid
)
715 atomic_inc(&pos
->count
);
717 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
721 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
723 struct nfs_lock_context
*res
, *new = NULL
;
724 struct inode
*inode
= d_inode(ctx
->dentry
);
726 spin_lock(&inode
->i_lock
);
727 res
= __nfs_find_lock_context(ctx
);
729 spin_unlock(&inode
->i_lock
);
730 new = kmalloc(sizeof(*new), GFP_KERNEL
);
732 return ERR_PTR(-ENOMEM
);
733 nfs_init_lock_context(new);
734 spin_lock(&inode
->i_lock
);
735 res
= __nfs_find_lock_context(ctx
);
737 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
738 new->open_context
= ctx
;
743 spin_unlock(&inode
->i_lock
);
747 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
749 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
751 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
752 struct inode
*inode
= d_inode(ctx
->dentry
);
754 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
756 list_del(&l_ctx
->list
);
757 spin_unlock(&inode
->i_lock
);
760 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
763 * nfs_close_context - Common close_context() routine NFSv2/v3
764 * @ctx: pointer to context
765 * @is_sync: is this a synchronous close
767 * Ensure that the attributes are up to date if we're mounted
768 * with close-to-open semantics and we have cached data that will
769 * need to be revalidated on open.
771 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
773 struct nfs_inode
*nfsi
;
775 struct nfs_server
*server
;
777 if (!(ctx
->mode
& FMODE_WRITE
))
781 inode
= d_inode(ctx
->dentry
);
783 if (inode
->i_mapping
->nrpages
== 0)
785 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
787 if (!list_empty(&nfsi
->open_files
))
789 server
= NFS_SERVER(inode
);
790 if (server
->flags
& NFS_MOUNT_NOCTO
)
792 nfs_revalidate_inode(server
, inode
);
794 EXPORT_SYMBOL_GPL(nfs_close_context
);
796 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
798 struct nfs_open_context
*ctx
;
799 struct rpc_cred
*cred
= rpc_lookup_cred();
801 return ERR_CAST(cred
);
803 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
806 return ERR_PTR(-ENOMEM
);
808 nfs_sb_active(dentry
->d_sb
);
809 ctx
->dentry
= dget(dentry
);
815 nfs_init_lock_context(&ctx
->lock_context
);
816 ctx
->lock_context
.open_context
= ctx
;
817 INIT_LIST_HEAD(&ctx
->list
);
818 ctx
->mdsthreshold
= NULL
;
821 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
823 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
826 atomic_inc(&ctx
->lock_context
.count
);
829 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
831 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
833 struct inode
*inode
= d_inode(ctx
->dentry
);
834 struct super_block
*sb
= ctx
->dentry
->d_sb
;
836 if (!list_empty(&ctx
->list
)) {
837 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
839 list_del(&ctx
->list
);
840 spin_unlock(&inode
->i_lock
);
841 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
844 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
845 if (ctx
->cred
!= NULL
)
846 put_rpccred(ctx
->cred
);
849 kfree(ctx
->mdsthreshold
);
853 void put_nfs_open_context(struct nfs_open_context
*ctx
)
855 __put_nfs_open_context(ctx
, 0);
857 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
859 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
861 __put_nfs_open_context(ctx
, 1);
865 * Ensure that mmap has a recent RPC credential for use when writing out
868 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
870 struct inode
*inode
= d_inode(ctx
->dentry
);
871 struct nfs_inode
*nfsi
= NFS_I(inode
);
873 spin_lock(&inode
->i_lock
);
874 list_add(&ctx
->list
, &nfsi
->open_files
);
875 spin_unlock(&inode
->i_lock
);
877 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
879 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
881 filp
->private_data
= get_nfs_open_context(ctx
);
882 if (list_empty(&ctx
->list
))
883 nfs_inode_attach_open_context(ctx
);
885 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
888 * Given an inode, search for an open context with the desired characteristics
890 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
892 struct nfs_inode
*nfsi
= NFS_I(inode
);
893 struct nfs_open_context
*pos
, *ctx
= NULL
;
895 spin_lock(&inode
->i_lock
);
896 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
897 if (cred
!= NULL
&& pos
->cred
!= cred
)
899 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
901 ctx
= get_nfs_open_context(pos
);
904 spin_unlock(&inode
->i_lock
);
908 void nfs_file_clear_open_context(struct file
*filp
)
910 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
913 struct inode
*inode
= d_inode(ctx
->dentry
);
915 filp
->private_data
= NULL
;
916 spin_lock(&inode
->i_lock
);
917 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
918 spin_unlock(&inode
->i_lock
);
919 put_nfs_open_context_sync(ctx
);
924 * These allocate and release file read/write context information.
926 int nfs_open(struct inode
*inode
, struct file
*filp
)
928 struct nfs_open_context
*ctx
;
930 ctx
= alloc_nfs_open_context(file_dentry(filp
), filp
->f_mode
);
933 nfs_file_set_open_context(filp
, ctx
);
934 put_nfs_open_context(ctx
);
935 nfs_fscache_open_file(inode
, filp
);
938 EXPORT_SYMBOL_GPL(nfs_open
);
941 * This function is called whenever some part of NFS notices that
942 * the cached attributes have to be refreshed.
945 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
947 int status
= -ESTALE
;
948 struct nfs4_label
*label
= NULL
;
949 struct nfs_fattr
*fattr
= NULL
;
950 struct nfs_inode
*nfsi
= NFS_I(inode
);
952 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
953 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
955 trace_nfs_revalidate_inode_enter(inode
);
957 if (is_bad_inode(inode
))
959 if (NFS_STALE(inode
))
963 fattr
= nfs_alloc_fattr();
967 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
969 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
971 status
= PTR_ERR(label
);
975 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
977 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
979 (unsigned long long)NFS_FILEID(inode
), status
);
980 if (status
== -ESTALE
) {
981 nfs_zap_caches(inode
);
982 if (!S_ISDIR(inode
->i_mode
))
983 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
988 status
= nfs_refresh_inode(inode
, fattr
);
990 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
992 (unsigned long long)NFS_FILEID(inode
), status
);
996 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
997 nfs_zap_acl_cache(inode
);
999 nfs_setsecurity(inode
, fattr
, label
);
1001 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
1003 (unsigned long long)NFS_FILEID(inode
));
1006 nfs4_label_free(label
);
1008 nfs_free_fattr(fattr
);
1009 trace_nfs_revalidate_inode_exit(inode
, status
);
1013 int nfs_attribute_timeout(struct inode
*inode
)
1015 struct nfs_inode
*nfsi
= NFS_I(inode
);
1017 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
1020 int nfs_attribute_cache_expired(struct inode
*inode
)
1022 if (nfs_have_delegated_attributes(inode
))
1024 return nfs_attribute_timeout(inode
);
1028 * nfs_revalidate_inode - Revalidate the inode attributes
1029 * @server - pointer to nfs_server struct
1030 * @inode - pointer to inode struct
1032 * Updates inode attribute information by retrieving the data from the server.
1034 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1036 if (!nfs_need_revalidate_inode(inode
))
1037 return NFS_STALE(inode
) ? -ESTALE
: 0;
1038 return __nfs_revalidate_inode(server
, inode
);
1040 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1042 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1044 if (!(NFS_I(inode
)->cache_validity
&
1045 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1046 && !nfs_attribute_cache_expired(inode
))
1047 return NFS_STALE(inode
) ? -ESTALE
: 0;
1051 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1053 struct nfs_inode
*nfsi
= NFS_I(inode
);
1056 if (mapping
->nrpages
!= 0) {
1057 if (S_ISREG(inode
->i_mode
)) {
1058 unmap_mapping_range(mapping
, 0, 0, 0);
1059 ret
= nfs_sync_mapping(mapping
);
1063 ret
= invalidate_inode_pages2(mapping
);
1067 if (S_ISDIR(inode
->i_mode
)) {
1068 spin_lock(&inode
->i_lock
);
1069 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1070 spin_unlock(&inode
->i_lock
);
1072 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1073 nfs_fscache_wait_on_invalidate(inode
);
1075 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1077 (unsigned long long)NFS_FILEID(inode
));
1081 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1083 if (nfs_have_delegated_attributes(inode
))
1085 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1086 || nfs_attribute_timeout(inode
)
1087 || NFS_STALE(inode
);
1091 * __nfs_revalidate_mapping - Revalidate the pagecache
1092 * @inode - pointer to host inode
1093 * @mapping - pointer to mapping
1094 * @may_lock - take inode->i_mutex?
1096 static int __nfs_revalidate_mapping(struct inode
*inode
,
1097 struct address_space
*mapping
,
1100 struct nfs_inode
*nfsi
= NFS_I(inode
);
1101 unsigned long *bitlock
= &nfsi
->flags
;
1104 /* swapfiles are not supposed to be shared. */
1105 if (IS_SWAPFILE(inode
))
1108 if (nfs_mapping_need_revalidate_inode(inode
)) {
1109 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1115 * We must clear NFS_INO_INVALID_DATA first to ensure that
1116 * invalidations that come in while we're shooting down the mappings
1117 * are respected. But, that leaves a race window where one revalidator
1118 * can clear the flag, and then another checks it before the mapping
1119 * gets invalidated. Fix that by serializing access to this part of
1122 * At the same time, we need to allow other tasks to see whether we
1123 * might be in the middle of invalidating the pages, so we only set
1124 * the bit lock here if it looks like we're going to be doing that.
1127 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1128 nfs_wait_bit_killable
, TASK_KILLABLE
);
1131 spin_lock(&inode
->i_lock
);
1132 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1133 spin_unlock(&inode
->i_lock
);
1136 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1138 spin_unlock(&inode
->i_lock
);
1142 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1144 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1145 spin_unlock(&inode
->i_lock
);
1146 trace_nfs_invalidate_mapping_enter(inode
);
1148 mutex_lock(&inode
->i_mutex
);
1149 ret
= nfs_invalidate_mapping(inode
, mapping
);
1150 mutex_unlock(&inode
->i_mutex
);
1152 ret
= nfs_invalidate_mapping(inode
, mapping
);
1153 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1155 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1156 smp_mb__after_atomic();
1157 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1163 * nfs_revalidate_mapping - Revalidate the pagecache
1164 * @inode - pointer to host inode
1165 * @mapping - pointer to mapping
1167 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1169 return __nfs_revalidate_mapping(inode
, mapping
, false);
1173 * nfs_revalidate_mapping_protected - Revalidate the pagecache
1174 * @inode - pointer to host inode
1175 * @mapping - pointer to mapping
1177 * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex
1178 * while invalidating the mapping.
1180 int nfs_revalidate_mapping_protected(struct inode
*inode
, struct address_space
*mapping
)
1182 return __nfs_revalidate_mapping(inode
, mapping
, true);
1185 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1187 struct nfs_inode
*nfsi
= NFS_I(inode
);
1188 unsigned long ret
= 0;
1190 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1191 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1192 && inode
->i_version
== fattr
->pre_change_attr
) {
1193 inode
->i_version
= fattr
->change_attr
;
1194 if (S_ISDIR(inode
->i_mode
))
1195 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1196 ret
|= NFS_INO_INVALID_ATTR
;
1198 /* If we have atomic WCC data, we may update some attributes */
1199 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1200 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1201 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1202 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1203 ret
|= NFS_INO_INVALID_ATTR
;
1206 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1207 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1208 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1209 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1210 if (S_ISDIR(inode
->i_mode
))
1211 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1212 ret
|= NFS_INO_INVALID_ATTR
;
1214 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1215 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1216 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1217 && nfsi
->nrequests
== 0) {
1218 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1219 ret
|= NFS_INO_INVALID_ATTR
;
1226 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1227 * @inode - pointer to inode
1228 * @fattr - updated attributes
1230 * Verifies the attribute cache. If we have just changed the attributes,
1231 * so that fattr carries weak cache consistency data, then it may
1232 * also update the ctime/mtime/change_attribute.
1234 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1236 struct nfs_inode
*nfsi
= NFS_I(inode
);
1237 loff_t cur_size
, new_isize
;
1238 unsigned long invalid
= 0;
1241 if (nfs_have_delegated_attributes(inode
))
1243 /* Has the inode gone and changed behind our back? */
1244 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1246 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1249 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1250 inode
->i_version
!= fattr
->change_attr
)
1251 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1253 /* Verify a few of the more important attributes */
1254 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1255 invalid
|= NFS_INO_INVALID_ATTR
;
1257 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1258 cur_size
= i_size_read(inode
);
1259 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1260 if (cur_size
!= new_isize
)
1261 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1263 if (nfsi
->nrequests
!= 0)
1264 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1266 /* Have any file permissions changed? */
1267 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1268 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1269 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1270 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1271 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1272 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1274 /* Has the link count changed? */
1275 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1276 invalid
|= NFS_INO_INVALID_ATTR
;
1278 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1279 invalid
|= NFS_INO_INVALID_ATIME
;
1282 nfs_set_cache_invalid(inode
, invalid
);
1284 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1288 static atomic_long_t nfs_attr_generation_counter
;
1290 static unsigned long nfs_read_attr_generation_counter(void)
1292 return atomic_long_read(&nfs_attr_generation_counter
);
1295 unsigned long nfs_inc_attr_generation_counter(void)
1297 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1299 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter
);
1301 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1304 fattr
->time_start
= jiffies
;
1305 fattr
->gencount
= nfs_inc_attr_generation_counter();
1306 fattr
->owner_name
= NULL
;
1307 fattr
->group_name
= NULL
;
1309 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1312 * nfs_fattr_set_barrier
1313 * @fattr: attributes
1315 * Used to set a barrier after an attribute was updated. This
1316 * barrier ensures that older attributes from RPC calls that may
1317 * have raced with our update cannot clobber these new values.
1318 * Note that you are still responsible for ensuring that other
1319 * operations which change the attribute on the server do not
1322 void nfs_fattr_set_barrier(struct nfs_fattr
*fattr
)
1324 fattr
->gencount
= nfs_inc_attr_generation_counter();
1327 struct nfs_fattr
*nfs_alloc_fattr(void)
1329 struct nfs_fattr
*fattr
;
1331 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1333 nfs_fattr_init(fattr
);
1336 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1338 struct nfs_fh
*nfs_alloc_fhandle(void)
1342 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1347 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1351 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1352 * in the same way that wireshark does
1356 * For debugging only.
1358 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1360 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1361 * not on the result */
1362 return nfs_fhandle_hash(fh
);
1364 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1367 * _nfs_display_fhandle - display an NFS file handle on the console
1369 * @fh: file handle to display
1370 * @caption: display caption
1372 * For debugging only.
1374 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1378 if (fh
== NULL
|| fh
->size
== 0) {
1379 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1383 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1384 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1385 for (i
= 0; i
< fh
->size
; i
+= 16) {
1386 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1388 switch ((fh
->size
- i
- 1) >> 2) {
1390 printk(KERN_DEFAULT
" %08x\n",
1394 printk(KERN_DEFAULT
" %08x %08x\n",
1395 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1398 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1399 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1400 be32_to_cpup(pos
+ 2));
1403 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1404 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1405 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1409 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1413 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1414 * @inode - pointer to inode
1415 * @fattr - attributes
1417 * Attempt to divine whether or not an RPC call reply carrying stale
1418 * attributes got scheduled after another call carrying updated ones.
1420 * To do so, the function first assumes that a more recent ctime means
1421 * that the attributes in fattr are newer, however it also attempt to
1422 * catch the case where ctime either didn't change, or went backwards
1423 * (if someone reset the clock on the server) by looking at whether
1424 * or not this RPC call was started after the inode was last updated.
1425 * Note also the check for wraparound of 'attr_gencount'
1427 * The function returns 'true' if it thinks the attributes in 'fattr' are
1428 * more recent than the ones cached in the inode.
1431 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1433 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1435 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1436 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1440 * Don't trust the change_attribute, mtime, ctime or size if
1441 * a pnfs LAYOUTCOMMIT is outstanding
1443 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1444 struct nfs_fattr
*fattr
)
1446 if (pnfs_layoutcommit_outstanding(inode
))
1447 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1448 NFS_ATTR_FATTR_MTIME
|
1449 NFS_ATTR_FATTR_CTIME
|
1450 NFS_ATTR_FATTR_SIZE
);
1453 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1457 trace_nfs_refresh_inode_enter(inode
);
1459 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1461 if (nfs_inode_attrs_need_update(inode
, fattr
))
1462 ret
= nfs_update_inode(inode
, fattr
);
1464 ret
= nfs_check_inode_attributes(inode
, fattr
);
1466 trace_nfs_refresh_inode_exit(inode
, ret
);
1471 * nfs_refresh_inode - try to update the inode attribute cache
1472 * @inode - pointer to inode
1473 * @fattr - updated attributes
1475 * Check that an RPC call that returned attributes has not overlapped with
1476 * other recent updates of the inode metadata, then decide whether it is
1477 * safe to do a full update of the inode attributes, or whether just to
1478 * call nfs_check_inode_attributes.
1480 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1484 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1486 spin_lock(&inode
->i_lock
);
1487 status
= nfs_refresh_inode_locked(inode
, fattr
);
1488 spin_unlock(&inode
->i_lock
);
1492 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1494 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1496 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1499 * Don't revalidate the pagecache if we hold a delegation, but do
1500 * force an attribute update
1502 if (NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
))
1503 invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_FORCED
;
1505 if (S_ISDIR(inode
->i_mode
))
1506 invalid
|= NFS_INO_INVALID_DATA
;
1507 nfs_set_cache_invalid(inode
, invalid
);
1508 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1510 return nfs_refresh_inode_locked(inode
, fattr
);
1514 * nfs_post_op_update_inode - try to update the inode attribute cache
1515 * @inode - pointer to inode
1516 * @fattr - updated attributes
1518 * After an operation that has changed the inode metadata, mark the
1519 * attribute cache as being invalid, then try to update it.
1521 * NB: if the server didn't return any post op attributes, this
1522 * function will force the retrieval of attributes before the next
1523 * NFS request. Thus it should be used only for operations that
1524 * are expected to change one or more attributes, to avoid
1525 * unnecessary NFS requests and trips through nfs_update_inode().
1527 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1531 spin_lock(&inode
->i_lock
);
1532 nfs_fattr_set_barrier(fattr
);
1533 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1534 spin_unlock(&inode
->i_lock
);
1538 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1541 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1542 * @inode - pointer to inode
1543 * @fattr - updated attributes
1545 * After an operation that has changed the inode metadata, mark the
1546 * attribute cache as being invalid, then try to update it. Fake up
1547 * weak cache consistency data, if none exist.
1549 * This function is mainly designed to be used by the ->write_done() functions.
1551 int nfs_post_op_update_inode_force_wcc_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1555 /* Don't do a WCC update if these attributes are already stale */
1556 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1557 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1558 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1559 | NFS_ATTR_FATTR_PRESIZE
1560 | NFS_ATTR_FATTR_PREMTIME
1561 | NFS_ATTR_FATTR_PRECTIME
);
1564 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1565 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1566 fattr
->pre_change_attr
= inode
->i_version
;
1567 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1569 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1570 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1571 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1572 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1574 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1575 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1576 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1577 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1579 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1580 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1581 fattr
->pre_size
= i_size_read(inode
);
1582 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1585 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1590 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1591 * @inode - pointer to inode
1592 * @fattr - updated attributes
1594 * After an operation that has changed the inode metadata, mark the
1595 * attribute cache as being invalid, then try to update it. Fake up
1596 * weak cache consistency data, if none exist.
1598 * This function is mainly designed to be used by the ->write_done() functions.
1600 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1604 spin_lock(&inode
->i_lock
);
1605 nfs_fattr_set_barrier(fattr
);
1606 status
= nfs_post_op_update_inode_force_wcc_locked(inode
, fattr
);
1607 spin_unlock(&inode
->i_lock
);
1610 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1613 static inline bool nfs_fileid_valid(struct nfs_inode
*nfsi
,
1614 struct nfs_fattr
*fattr
)
1616 bool ret1
= true, ret2
= true;
1618 if (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)
1619 ret1
= (nfsi
->fileid
== fattr
->fileid
);
1620 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
)
1621 ret2
= (nfsi
->fileid
== fattr
->mounted_on_fileid
);
1622 return ret1
|| ret2
;
1626 * Many nfs protocol calls return the new file attributes after
1627 * an operation. Here we update the inode to reflect the state
1628 * of the server's inode.
1630 * This is a bit tricky because we have to make sure all dirty pages
1631 * have been sent off to the server before calling invalidate_inode_pages.
1632 * To make sure no other process adds more write requests while we try
1633 * our best to flush them, we make them sleep during the attribute refresh.
1635 * A very similar scenario holds for the dir cache.
1637 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1639 struct nfs_server
*server
;
1640 struct nfs_inode
*nfsi
= NFS_I(inode
);
1641 loff_t cur_isize
, new_isize
;
1642 unsigned long invalid
= 0;
1643 unsigned long now
= jiffies
;
1644 unsigned long save_cache_validity
;
1645 bool cache_revalidated
= true;
1647 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1648 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1649 nfs_display_fhandle_hash(NFS_FH(inode
)),
1650 atomic_read(&inode
->i_count
), fattr
->valid
);
1652 if (!nfs_fileid_valid(nfsi
, fattr
)) {
1653 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1654 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1655 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1656 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1657 (long long)fattr
->fileid
);
1662 * Make sure the inode's type hasn't changed.
1664 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1666 * Big trouble! The inode has become a different object.
1668 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1669 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1673 server
= NFS_SERVER(inode
);
1674 /* Update the fsid? */
1675 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1676 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1677 !IS_AUTOMOUNT(inode
))
1678 server
->fsid
= fattr
->fsid
;
1681 * Update the read time so we don't revalidate too often.
1683 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1685 save_cache_validity
= nfsi
->cache_validity
;
1686 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1687 | NFS_INO_INVALID_ATIME
1688 | NFS_INO_REVAL_FORCED
1689 | NFS_INO_REVAL_PAGECACHE
);
1691 /* Do atomic weak cache consistency updates */
1692 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1694 /* More cache consistency checks */
1695 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1696 if (inode
->i_version
!= fattr
->change_attr
) {
1697 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1698 inode
->i_sb
->s_id
, inode
->i_ino
);
1699 invalid
|= NFS_INO_INVALID_ATTR
1700 | NFS_INO_INVALID_DATA
1701 | NFS_INO_INVALID_ACCESS
1702 | NFS_INO_INVALID_ACL
;
1703 if (S_ISDIR(inode
->i_mode
))
1704 nfs_force_lookup_revalidate(inode
);
1705 inode
->i_version
= fattr
->change_attr
;
1708 nfsi
->cache_validity
|= save_cache_validity
;
1709 cache_revalidated
= false;
1712 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1713 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1714 } else if (server
->caps
& NFS_CAP_MTIME
) {
1715 nfsi
->cache_validity
|= save_cache_validity
&
1716 (NFS_INO_INVALID_ATTR
1717 | NFS_INO_REVAL_FORCED
);
1718 cache_revalidated
= false;
1721 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1722 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1723 } else if (server
->caps
& NFS_CAP_CTIME
) {
1724 nfsi
->cache_validity
|= save_cache_validity
&
1725 (NFS_INO_INVALID_ATTR
1726 | NFS_INO_REVAL_FORCED
);
1727 cache_revalidated
= false;
1730 /* Check if our cached file size is stale */
1731 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1732 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1733 cur_isize
= i_size_read(inode
);
1734 if (new_isize
!= cur_isize
) {
1735 /* Do we perhaps have any outstanding writes, or has
1736 * the file grown beyond our last write? */
1737 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1738 i_size_write(inode
, new_isize
);
1739 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1741 dprintk("NFS: isize change on server for file %s/%ld "
1745 (long long)cur_isize
,
1746 (long long)new_isize
);
1749 nfsi
->cache_validity
|= save_cache_validity
&
1750 (NFS_INO_INVALID_ATTR
1751 | NFS_INO_REVAL_PAGECACHE
1752 | NFS_INO_REVAL_FORCED
);
1753 cache_revalidated
= false;
1757 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1758 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1759 else if (server
->caps
& NFS_CAP_ATIME
) {
1760 nfsi
->cache_validity
|= save_cache_validity
&
1761 (NFS_INO_INVALID_ATIME
1762 | NFS_INO_REVAL_FORCED
);
1763 cache_revalidated
= false;
1766 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1767 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1768 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1769 newmode
|= fattr
->mode
& S_IALLUGO
;
1770 inode
->i_mode
= newmode
;
1771 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1773 } else if (server
->caps
& NFS_CAP_MODE
) {
1774 nfsi
->cache_validity
|= save_cache_validity
&
1775 (NFS_INO_INVALID_ATTR
1776 | NFS_INO_INVALID_ACCESS
1777 | NFS_INO_INVALID_ACL
1778 | NFS_INO_REVAL_FORCED
);
1779 cache_revalidated
= false;
1782 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1783 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1784 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1785 inode
->i_uid
= fattr
->uid
;
1787 } else if (server
->caps
& NFS_CAP_OWNER
) {
1788 nfsi
->cache_validity
|= save_cache_validity
&
1789 (NFS_INO_INVALID_ATTR
1790 | NFS_INO_INVALID_ACCESS
1791 | NFS_INO_INVALID_ACL
1792 | NFS_INO_REVAL_FORCED
);
1793 cache_revalidated
= false;
1796 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1797 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1798 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1799 inode
->i_gid
= fattr
->gid
;
1801 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
) {
1802 nfsi
->cache_validity
|= save_cache_validity
&
1803 (NFS_INO_INVALID_ATTR
1804 | NFS_INO_INVALID_ACCESS
1805 | NFS_INO_INVALID_ACL
1806 | NFS_INO_REVAL_FORCED
);
1807 cache_revalidated
= false;
1810 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1811 if (inode
->i_nlink
!= fattr
->nlink
) {
1812 invalid
|= NFS_INO_INVALID_ATTR
;
1813 if (S_ISDIR(inode
->i_mode
))
1814 invalid
|= NFS_INO_INVALID_DATA
;
1815 set_nlink(inode
, fattr
->nlink
);
1817 } else if (server
->caps
& NFS_CAP_NLINK
) {
1818 nfsi
->cache_validity
|= save_cache_validity
&
1819 (NFS_INO_INVALID_ATTR
1820 | NFS_INO_REVAL_FORCED
);
1821 cache_revalidated
= false;
1824 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1826 * report the blocks in 512byte units
1828 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1829 } else if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1830 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1832 cache_revalidated
= false;
1834 /* Update attrtimeo value if we're out of the unstable period */
1835 if (invalid
& NFS_INO_INVALID_ATTR
) {
1836 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1837 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1838 nfsi
->attrtimeo_timestamp
= now
;
1839 /* Set barrier to be more recent than all outstanding updates */
1840 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1842 if (cache_revalidated
) {
1843 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
,
1844 nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1845 nfsi
->attrtimeo
<<= 1;
1846 if (nfsi
->attrtimeo
> NFS_MAXATTRTIMEO(inode
))
1847 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1849 nfsi
->attrtimeo_timestamp
= now
;
1851 /* Set the barrier to be more recent than this fattr */
1852 if ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
> 0)
1853 nfsi
->attr_gencount
= fattr
->gencount
;
1856 /* Don't declare attrcache up to date if there were no attrs! */
1857 if (cache_revalidated
)
1858 invalid
&= ~NFS_INO_INVALID_ATTR
;
1860 /* Don't invalidate the data if we were to blame */
1861 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1862 || S_ISLNK(inode
->i_mode
)))
1863 invalid
&= ~NFS_INO_INVALID_DATA
;
1864 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1865 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1866 nfs_set_cache_invalid(inode
, invalid
);
1871 * No need to worry about unhashing the dentry, as the
1872 * lookup validation will know that the inode is bad.
1873 * (But we fall through to invalidate the caches.)
1875 nfs_invalidate_inode(inode
);
1879 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1881 struct nfs_inode
*nfsi
;
1882 nfsi
= kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1886 nfsi
->cache_validity
= 0UL;
1887 #if IS_ENABLED(CONFIG_NFS_V4)
1888 nfsi
->nfs4_acl
= NULL
;
1889 #endif /* CONFIG_NFS_V4 */
1890 return &nfsi
->vfs_inode
;
1892 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1894 static void nfs_i_callback(struct rcu_head
*head
)
1896 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1897 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1900 void nfs_destroy_inode(struct inode
*inode
)
1902 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1904 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1906 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1908 #if IS_ENABLED(CONFIG_NFS_V4)
1909 INIT_LIST_HEAD(&nfsi
->open_states
);
1910 nfsi
->delegation
= NULL
;
1911 init_rwsem(&nfsi
->rwsem
);
1912 nfsi
->layout
= NULL
;
1916 static void init_once(void *foo
)
1918 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1920 inode_init_once(&nfsi
->vfs_inode
);
1921 INIT_LIST_HEAD(&nfsi
->open_files
);
1922 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1923 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1924 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1925 nfsi
->nrequests
= 0;
1926 nfsi
->commit_info
.ncommit
= 0;
1927 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1928 atomic_set(&nfsi
->silly_count
, 1);
1929 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1930 init_waitqueue_head(&nfsi
->waitqueue
);
1931 nfs4_init_once(nfsi
);
1934 static int __init
nfs_init_inodecache(void)
1936 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1937 sizeof(struct nfs_inode
),
1938 0, (SLAB_RECLAIM_ACCOUNT
|
1941 if (nfs_inode_cachep
== NULL
)
1947 static void nfs_destroy_inodecache(void)
1950 * Make sure all delayed rcu free inodes are flushed before we
1954 kmem_cache_destroy(nfs_inode_cachep
);
1957 struct workqueue_struct
*nfsiod_workqueue
;
1958 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1961 * start up the nfsiod workqueue
1963 static int nfsiod_start(void)
1965 struct workqueue_struct
*wq
;
1966 dprintk("RPC: creating workqueue nfsiod\n");
1967 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1970 nfsiod_workqueue
= wq
;
1975 * Destroy the nfsiod workqueue
1977 static void nfsiod_stop(void)
1979 struct workqueue_struct
*wq
;
1981 wq
= nfsiod_workqueue
;
1984 nfsiod_workqueue
= NULL
;
1985 destroy_workqueue(wq
);
1989 EXPORT_SYMBOL_GPL(nfs_net_id
);
1991 static int nfs_net_init(struct net
*net
)
1993 nfs_clients_init(net
);
1994 return nfs_fs_proc_net_init(net
);
1997 static void nfs_net_exit(struct net
*net
)
1999 nfs_fs_proc_net_exit(net
);
2000 nfs_cleanup_cb_ident_idr(net
);
2003 static struct pernet_operations nfs_net_ops
= {
2004 .init
= nfs_net_init
,
2005 .exit
= nfs_net_exit
,
2007 .size
= sizeof(struct nfs_net
),
2013 static int __init
init_nfs_fs(void)
2017 err
= register_pernet_subsys(&nfs_net_ops
);
2021 err
= nfs_fscache_register();
2025 err
= nfsiod_start();
2029 err
= nfs_fs_proc_init();
2033 err
= nfs_init_nfspagecache();
2037 err
= nfs_init_inodecache();
2041 err
= nfs_init_readpagecache();
2045 err
= nfs_init_writepagecache();
2049 err
= nfs_init_directcache();
2053 rpc_proc_register(&init_net
, &nfs_rpcstat
);
2055 err
= register_nfs_fs();
2061 rpc_proc_unregister(&init_net
, "nfs");
2062 nfs_destroy_directcache();
2064 nfs_destroy_writepagecache();
2066 nfs_destroy_readpagecache();
2068 nfs_destroy_inodecache();
2070 nfs_destroy_nfspagecache();
2076 nfs_fscache_unregister();
2078 unregister_pernet_subsys(&nfs_net_ops
);
2083 static void __exit
exit_nfs_fs(void)
2085 nfs_destroy_directcache();
2086 nfs_destroy_writepagecache();
2087 nfs_destroy_readpagecache();
2088 nfs_destroy_inodecache();
2089 nfs_destroy_nfspagecache();
2090 nfs_fscache_unregister();
2091 unregister_pernet_subsys(&nfs_net_ops
);
2092 rpc_proc_unregister(&init_net
, "nfs");
2093 unregister_nfs_fs();
2098 /* Not quite true; I just maintain it */
2099 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2100 MODULE_LICENSE("GPL");
2101 module_param(enable_ino64
, bool, 0644);
2103 module_init(init_nfs_fs
)
2104 module_exit(exit_nfs_fs
)