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/signal.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 <linux/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
);
74 static int nfs_wait_killable(int mode
)
76 freezable_schedule_unsafe();
77 if (signal_pending_state(mode
, current
))
82 int nfs_wait_bit_killable(struct wait_bit_key
*key
, int mode
)
84 return nfs_wait_killable(mode
);
86 EXPORT_SYMBOL_GPL(nfs_wait_bit_killable
);
88 int nfs_wait_atomic_killable(atomic_t
*p
)
90 return nfs_wait_killable(TASK_KILLABLE
);
94 * nfs_compat_user_ino64 - returns the user-visible inode number
95 * @fileid: 64-bit fileid
97 * This function returns a 32-bit inode number if the boot parameter
98 * nfs.enable_ino64 is zero.
100 u64
nfs_compat_user_ino64(u64 fileid
)
111 if (sizeof(ino
) < sizeof(fileid
))
112 ino
^= fileid
>> (sizeof(fileid
)-sizeof(ino
)) * 8;
116 int nfs_drop_inode(struct inode
*inode
)
118 return NFS_STALE(inode
) || generic_drop_inode(inode
);
120 EXPORT_SYMBOL_GPL(nfs_drop_inode
);
122 void nfs_clear_inode(struct inode
*inode
)
125 * The following should never happen...
127 WARN_ON_ONCE(nfs_have_writebacks(inode
));
128 WARN_ON_ONCE(!list_empty(&NFS_I(inode
)->open_files
));
129 nfs_zap_acl_cache(inode
);
130 nfs_access_zap_cache(inode
);
131 nfs_fscache_clear_inode(inode
);
133 EXPORT_SYMBOL_GPL(nfs_clear_inode
);
135 void nfs_evict_inode(struct inode
*inode
)
137 truncate_inode_pages_final(&inode
->i_data
);
139 nfs_clear_inode(inode
);
142 int nfs_sync_inode(struct inode
*inode
)
144 inode_dio_wait(inode
);
145 return nfs_wb_all(inode
);
147 EXPORT_SYMBOL_GPL(nfs_sync_inode
);
150 * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
152 int nfs_sync_mapping(struct address_space
*mapping
)
156 if (mapping
->nrpages
!= 0) {
157 unmap_mapping_range(mapping
, 0, 0, 0);
158 ret
= nfs_wb_all(mapping
->host
);
163 static int nfs_attribute_timeout(struct inode
*inode
)
165 struct nfs_inode
*nfsi
= NFS_I(inode
);
167 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
170 static bool nfs_check_cache_invalid_delegated(struct inode
*inode
, unsigned long flags
)
172 unsigned long cache_validity
= READ_ONCE(NFS_I(inode
)->cache_validity
);
174 /* Special case for the pagecache or access cache */
175 if (flags
== NFS_INO_REVAL_PAGECACHE
&&
176 !(cache_validity
& NFS_INO_REVAL_FORCED
))
178 return (cache_validity
& flags
) != 0;
181 static bool nfs_check_cache_invalid_not_delegated(struct inode
*inode
, unsigned long flags
)
183 unsigned long cache_validity
= READ_ONCE(NFS_I(inode
)->cache_validity
);
185 if ((cache_validity
& flags
) != 0)
187 if (nfs_attribute_timeout(inode
))
192 bool nfs_check_cache_invalid(struct inode
*inode
, unsigned long flags
)
194 if (NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
))
195 return nfs_check_cache_invalid_delegated(inode
, flags
);
197 return nfs_check_cache_invalid_not_delegated(inode
, flags
);
200 static void nfs_set_cache_invalid(struct inode
*inode
, unsigned long flags
)
202 struct nfs_inode
*nfsi
= NFS_I(inode
);
204 if (inode
->i_mapping
->nrpages
== 0)
205 flags
&= ~NFS_INO_INVALID_DATA
;
206 nfsi
->cache_validity
|= flags
;
207 if (flags
& NFS_INO_INVALID_DATA
)
208 nfs_fscache_invalidate(inode
);
212 * Invalidate the local caches
214 static void nfs_zap_caches_locked(struct inode
*inode
)
216 struct nfs_inode
*nfsi
= NFS_I(inode
);
217 int mode
= inode
->i_mode
;
219 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
221 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
222 nfsi
->attrtimeo_timestamp
= jiffies
;
224 memset(NFS_I(inode
)->cookieverf
, 0, sizeof(NFS_I(inode
)->cookieverf
));
225 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
)) {
226 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
227 | NFS_INO_INVALID_DATA
228 | NFS_INO_INVALID_ACCESS
229 | NFS_INO_INVALID_ACL
230 | NFS_INO_REVAL_PAGECACHE
);
232 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
233 | NFS_INO_INVALID_ACCESS
234 | NFS_INO_INVALID_ACL
235 | NFS_INO_REVAL_PAGECACHE
);
236 nfs_zap_label_cache_locked(nfsi
);
239 void nfs_zap_caches(struct inode
*inode
)
241 spin_lock(&inode
->i_lock
);
242 nfs_zap_caches_locked(inode
);
243 spin_unlock(&inode
->i_lock
);
246 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
248 if (mapping
->nrpages
!= 0) {
249 spin_lock(&inode
->i_lock
);
250 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
251 spin_unlock(&inode
->i_lock
);
255 void nfs_zap_acl_cache(struct inode
*inode
)
257 void (*clear_acl_cache
)(struct inode
*);
259 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
260 if (clear_acl_cache
!= NULL
)
261 clear_acl_cache(inode
);
262 spin_lock(&inode
->i_lock
);
263 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
264 spin_unlock(&inode
->i_lock
);
266 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache
);
268 void nfs_invalidate_atime(struct inode
*inode
)
270 spin_lock(&inode
->i_lock
);
271 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATIME
);
272 spin_unlock(&inode
->i_lock
);
274 EXPORT_SYMBOL_GPL(nfs_invalidate_atime
);
277 * Invalidate, but do not unhash, the inode.
278 * NB: must be called with inode->i_lock held!
280 static void nfs_invalidate_inode(struct inode
*inode
)
282 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
283 nfs_zap_caches_locked(inode
);
286 struct nfs_find_desc
{
288 struct nfs_fattr
*fattr
;
292 * In NFSv3 we can have 64bit inode numbers. In order to support
293 * this, and re-exported directories (also seen in NFSv2)
294 * we are forced to allow 2 different inodes to have the same
298 nfs_find_actor(struct inode
*inode
, void *opaque
)
300 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
301 struct nfs_fh
*fh
= desc
->fh
;
302 struct nfs_fattr
*fattr
= desc
->fattr
;
304 if (NFS_FILEID(inode
) != fattr
->fileid
)
306 if ((S_IFMT
& inode
->i_mode
) != (S_IFMT
& fattr
->mode
))
308 if (nfs_compare_fh(NFS_FH(inode
), fh
))
310 if (is_bad_inode(inode
) || NFS_STALE(inode
))
316 nfs_init_locked(struct inode
*inode
, void *opaque
)
318 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
319 struct nfs_fattr
*fattr
= desc
->fattr
;
321 set_nfs_fileid(inode
, fattr
->fileid
);
322 inode
->i_mode
= fattr
->mode
;
323 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
327 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
328 static void nfs_clear_label_invalid(struct inode
*inode
)
330 spin_lock(&inode
->i_lock
);
331 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_LABEL
;
332 spin_unlock(&inode
->i_lock
);
335 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
336 struct nfs4_label
*label
)
343 if ((fattr
->valid
& NFS_ATTR_FATTR_V4_SECURITY_LABEL
) && inode
->i_security
) {
344 error
= security_inode_notifysecctx(inode
, label
->label
,
347 printk(KERN_ERR
"%s() %s %d "
348 "security_inode_notifysecctx() %d\n",
350 (char *)label
->label
,
352 nfs_clear_label_invalid(inode
);
356 struct nfs4_label
*nfs4_label_alloc(struct nfs_server
*server
, gfp_t flags
)
358 struct nfs4_label
*label
= NULL
;
359 int minor_version
= server
->nfs_client
->cl_minorversion
;
361 if (minor_version
< 2)
364 if (!(server
->caps
& NFS_CAP_SECURITY_LABEL
))
367 label
= kzalloc(sizeof(struct nfs4_label
), flags
);
369 return ERR_PTR(-ENOMEM
);
371 label
->label
= kzalloc(NFS4_MAXLABELLEN
, flags
);
372 if (label
->label
== NULL
) {
374 return ERR_PTR(-ENOMEM
);
376 label
->len
= NFS4_MAXLABELLEN
;
380 EXPORT_SYMBOL_GPL(nfs4_label_alloc
);
382 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
383 struct nfs4_label
*label
)
387 EXPORT_SYMBOL_GPL(nfs_setsecurity
);
390 * This is our front-end to iget that looks up inodes by file handle
391 * instead of inode number.
394 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
, struct nfs4_label
*label
)
396 struct nfs_find_desc desc
= {
400 struct inode
*inode
= ERR_PTR(-ENOENT
);
403 nfs_attr_check_mountpoint(sb
, fattr
);
405 if (nfs_attr_use_mounted_on_fileid(fattr
))
406 fattr
->fileid
= fattr
->mounted_on_fileid
;
407 else if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
409 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
412 hash
= nfs_fattr_to_ino_t(fattr
);
414 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
416 inode
= ERR_PTR(-ENOMEM
);
420 if (inode
->i_state
& I_NEW
) {
421 struct nfs_inode
*nfsi
= NFS_I(inode
);
422 unsigned long now
= jiffies
;
424 /* We set i_ino for the few things that still rely on it,
428 /* We can't support update_atime(), since the server will reset it */
429 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
430 inode
->i_mode
= fattr
->mode
;
431 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
432 && nfs_server_capable(inode
, NFS_CAP_MODE
))
433 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
434 /* Why so? Because we want revalidate for devices/FIFOs, and
435 * that's precisely what we have in nfs_file_inode_operations.
437 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
438 if (S_ISREG(inode
->i_mode
)) {
439 inode
->i_fop
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_ops
;
440 inode
->i_data
.a_ops
= &nfs_file_aops
;
441 } else if (S_ISDIR(inode
->i_mode
)) {
442 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
443 inode
->i_fop
= &nfs_dir_operations
;
444 inode
->i_data
.a_ops
= &nfs_dir_aops
;
445 /* Deal with crossing mountpoints */
446 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
447 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
448 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
449 inode
->i_op
= &nfs_referral_inode_operations
;
451 inode
->i_op
= &nfs_mountpoint_inode_operations
;
453 inode
->i_flags
|= S_AUTOMOUNT
;
455 } else if (S_ISLNK(inode
->i_mode
)) {
456 inode
->i_op
= &nfs_symlink_inode_operations
;
457 inode_nohighmem(inode
);
459 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
461 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
462 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
463 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
464 inode
->i_version
= 0;
467 inode
->i_uid
= make_kuid(&init_user_ns
, -2);
468 inode
->i_gid
= make_kgid(&init_user_ns
, -2);
470 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
474 nfsi
->read_cache_jiffies
= fattr
->time_start
;
475 nfsi
->attr_gencount
= fattr
->gencount
;
476 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
477 inode
->i_atime
= fattr
->atime
;
478 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
479 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
480 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
481 inode
->i_mtime
= fattr
->mtime
;
482 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
483 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
484 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
485 inode
->i_ctime
= fattr
->ctime
;
486 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
487 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
488 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
489 inode
->i_version
= fattr
->change_attr
;
491 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
492 | NFS_INO_REVAL_PAGECACHE
);
493 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
494 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
496 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
497 | NFS_INO_REVAL_PAGECACHE
);
498 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
499 set_nlink(inode
, fattr
->nlink
);
500 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
501 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
502 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
503 inode
->i_uid
= fattr
->uid
;
504 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
505 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
506 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
507 inode
->i_gid
= fattr
->gid
;
508 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
509 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
510 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
511 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
512 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
514 * report the blocks in 512byte units
516 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
519 nfs_setsecurity(inode
, fattr
, label
);
521 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
522 nfsi
->attrtimeo_timestamp
= now
;
523 nfsi
->access_cache
= RB_ROOT
;
525 nfs_fscache_init_inode(inode
);
527 unlock_new_inode(inode
);
529 nfs_refresh_inode(inode
, fattr
);
530 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
532 (unsigned long long)NFS_FILEID(inode
),
533 nfs_display_fhandle_hash(fh
),
534 atomic_read(&inode
->i_count
));
540 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
543 EXPORT_SYMBOL_GPL(nfs_fhget
);
545 #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)
548 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
550 struct inode
*inode
= d_inode(dentry
);
551 struct nfs_fattr
*fattr
;
554 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
556 /* skip mode change if it's just for clearing setuid/setgid */
557 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
558 attr
->ia_valid
&= ~ATTR_MODE
;
560 if (attr
->ia_valid
& ATTR_SIZE
) {
561 BUG_ON(!S_ISREG(inode
->i_mode
));
563 error
= inode_newsize_ok(inode
, attr
->ia_size
);
567 if (attr
->ia_size
== i_size_read(inode
))
568 attr
->ia_valid
&= ~ATTR_SIZE
;
571 /* Optimization: if the end result is no change, don't RPC */
572 attr
->ia_valid
&= NFS_VALID_ATTRS
;
573 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
576 trace_nfs_setattr_enter(inode
);
578 /* Write all dirty data */
579 if (S_ISREG(inode
->i_mode
))
580 nfs_sync_inode(inode
);
582 fattr
= nfs_alloc_fattr();
589 * Return any delegations if we're going to change ACLs
591 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
592 NFS_PROTO(inode
)->return_delegation(inode
);
593 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
595 error
= nfs_refresh_inode(inode
, fattr
);
596 nfs_free_fattr(fattr
);
598 trace_nfs_setattr_exit(inode
, error
);
601 EXPORT_SYMBOL_GPL(nfs_setattr
);
604 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
605 * @inode: inode of the file used
606 * @offset: file offset to start truncating
608 * This is a copy of the common vmtruncate, but with the locking
609 * corrected to take into account the fact that NFS requires
610 * inode->i_size to be updated under the inode->i_lock.
611 * Note: must be called with inode->i_lock held!
613 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
617 err
= inode_newsize_ok(inode
, offset
);
621 i_size_write(inode
, offset
);
624 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
626 spin_unlock(&inode
->i_lock
);
627 truncate_pagecache(inode
, offset
);
628 spin_lock(&inode
->i_lock
);
634 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
635 * @inode: pointer to struct inode
636 * @attr: pointer to struct iattr
638 * Note: we do this in the *proc.c in order to ensure that
639 * it works for things like exclusive creates too.
641 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
,
642 struct nfs_fattr
*fattr
)
644 /* Barrier: bump the attribute generation count. */
645 nfs_fattr_set_barrier(fattr
);
647 spin_lock(&inode
->i_lock
);
648 NFS_I(inode
)->attr_gencount
= fattr
->gencount
;
649 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
650 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
651 int mode
= attr
->ia_mode
& S_IALLUGO
;
652 mode
|= inode
->i_mode
& ~S_IALLUGO
;
653 inode
->i_mode
= mode
;
655 if ((attr
->ia_valid
& ATTR_UID
) != 0)
656 inode
->i_uid
= attr
->ia_uid
;
657 if ((attr
->ia_valid
& ATTR_GID
) != 0)
658 inode
->i_gid
= attr
->ia_gid
;
659 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
660 | NFS_INO_INVALID_ACL
);
662 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
663 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
664 nfs_vmtruncate(inode
, attr
->ia_size
);
667 nfs_update_inode(inode
, fattr
);
669 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATTR
;
670 spin_unlock(&inode
->i_lock
);
672 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
674 static void nfs_readdirplus_parent_cache_miss(struct dentry
*dentry
)
676 struct dentry
*parent
;
678 if (!nfs_server_capable(d_inode(dentry
), NFS_CAP_READDIRPLUS
))
680 parent
= dget_parent(dentry
);
681 nfs_force_use_readdirplus(d_inode(parent
));
685 static void nfs_readdirplus_parent_cache_hit(struct dentry
*dentry
)
687 struct dentry
*parent
;
689 if (!nfs_server_capable(d_inode(dentry
), NFS_CAP_READDIRPLUS
))
691 parent
= dget_parent(dentry
);
692 nfs_advise_use_readdirplus(d_inode(parent
));
696 static bool nfs_need_revalidate_inode(struct inode
*inode
)
698 if (NFS_I(inode
)->cache_validity
&
699 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
701 if (nfs_attribute_cache_expired(inode
))
706 int nfs_getattr(const struct path
*path
, struct kstat
*stat
,
707 u32 request_mask
, unsigned int query_flags
)
709 struct inode
*inode
= d_inode(path
->dentry
);
710 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
713 trace_nfs_getattr_enter(inode
);
714 /* Flush out writes to the server in order to update c/mtime. */
715 if (S_ISREG(inode
->i_mode
)) {
716 err
= filemap_write_and_wait(inode
->i_mapping
);
722 * We may force a getattr if the user cares about atime.
724 * Note that we only have to check the vfsmount flags here:
725 * - NFS always sets S_NOATIME by so checking it would give a
727 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
728 * no point in checking those.
730 if ((path
->mnt
->mnt_flags
& MNT_NOATIME
) ||
731 ((path
->mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
734 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
735 struct nfs_server
*server
= NFS_SERVER(inode
);
737 if (!(server
->flags
& NFS_MOUNT_NOAC
))
738 nfs_readdirplus_parent_cache_miss(path
->dentry
);
740 nfs_readdirplus_parent_cache_hit(path
->dentry
);
741 err
= __nfs_revalidate_inode(server
, inode
);
743 nfs_readdirplus_parent_cache_hit(path
->dentry
);
745 generic_fillattr(inode
, stat
);
746 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
747 if (S_ISDIR(inode
->i_mode
))
748 stat
->blksize
= NFS_SERVER(inode
)->dtsize
;
751 trace_nfs_getattr_exit(inode
, err
);
754 EXPORT_SYMBOL_GPL(nfs_getattr
);
756 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
758 atomic_set(&l_ctx
->count
, 1);
759 l_ctx
->lockowner
= current
->files
;
760 INIT_LIST_HEAD(&l_ctx
->list
);
761 atomic_set(&l_ctx
->io_count
, 0);
764 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
766 struct nfs_lock_context
*head
= &ctx
->lock_context
;
767 struct nfs_lock_context
*pos
= head
;
770 if (pos
->lockowner
!= current
->files
)
772 atomic_inc(&pos
->count
);
774 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
778 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
780 struct nfs_lock_context
*res
, *new = NULL
;
781 struct inode
*inode
= d_inode(ctx
->dentry
);
783 spin_lock(&inode
->i_lock
);
784 res
= __nfs_find_lock_context(ctx
);
786 spin_unlock(&inode
->i_lock
);
787 new = kmalloc(sizeof(*new), GFP_KERNEL
);
789 return ERR_PTR(-ENOMEM
);
790 nfs_init_lock_context(new);
791 spin_lock(&inode
->i_lock
);
792 res
= __nfs_find_lock_context(ctx
);
794 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
795 new->open_context
= ctx
;
800 spin_unlock(&inode
->i_lock
);
804 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
806 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
808 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
809 struct inode
*inode
= d_inode(ctx
->dentry
);
811 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
813 list_del(&l_ctx
->list
);
814 spin_unlock(&inode
->i_lock
);
817 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
820 * nfs_close_context - Common close_context() routine NFSv2/v3
821 * @ctx: pointer to context
822 * @is_sync: is this a synchronous close
824 * Ensure that the attributes are up to date if we're mounted
825 * with close-to-open semantics and we have cached data that will
826 * need to be revalidated on open.
828 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
830 struct nfs_inode
*nfsi
;
832 struct nfs_server
*server
;
834 if (!(ctx
->mode
& FMODE_WRITE
))
838 inode
= d_inode(ctx
->dentry
);
839 if (NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
))
842 if (inode
->i_mapping
->nrpages
== 0)
844 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
846 if (!list_empty(&nfsi
->open_files
))
848 server
= NFS_SERVER(inode
);
849 if (server
->flags
& NFS_MOUNT_NOCTO
)
851 nfs_revalidate_inode(server
, inode
);
853 EXPORT_SYMBOL_GPL(nfs_close_context
);
855 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
,
859 struct nfs_open_context
*ctx
;
860 struct rpc_cred
*cred
= rpc_lookup_cred();
862 return ERR_CAST(cred
);
864 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
867 return ERR_PTR(-ENOMEM
);
869 nfs_sb_active(dentry
->d_sb
);
870 ctx
->dentry
= dget(dentry
);
876 ctx
->flock_owner
= (fl_owner_t
)filp
;
877 nfs_init_lock_context(&ctx
->lock_context
);
878 ctx
->lock_context
.open_context
= ctx
;
879 INIT_LIST_HEAD(&ctx
->list
);
880 ctx
->mdsthreshold
= NULL
;
883 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
885 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
888 atomic_inc(&ctx
->lock_context
.count
);
891 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
893 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
895 struct inode
*inode
= d_inode(ctx
->dentry
);
896 struct super_block
*sb
= ctx
->dentry
->d_sb
;
898 if (!list_empty(&ctx
->list
)) {
899 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
901 list_del(&ctx
->list
);
902 spin_unlock(&inode
->i_lock
);
903 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
906 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
907 if (ctx
->cred
!= NULL
)
908 put_rpccred(ctx
->cred
);
911 kfree(ctx
->mdsthreshold
);
915 void put_nfs_open_context(struct nfs_open_context
*ctx
)
917 __put_nfs_open_context(ctx
, 0);
919 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
921 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
923 __put_nfs_open_context(ctx
, 1);
927 * Ensure that mmap has a recent RPC credential for use when writing out
930 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
932 struct inode
*inode
= d_inode(ctx
->dentry
);
933 struct nfs_inode
*nfsi
= NFS_I(inode
);
935 spin_lock(&inode
->i_lock
);
936 if (ctx
->mode
& FMODE_WRITE
)
937 list_add(&ctx
->list
, &nfsi
->open_files
);
939 list_add_tail(&ctx
->list
, &nfsi
->open_files
);
940 spin_unlock(&inode
->i_lock
);
942 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
944 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
946 filp
->private_data
= get_nfs_open_context(ctx
);
947 if (list_empty(&ctx
->list
))
948 nfs_inode_attach_open_context(ctx
);
950 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
953 * Given an inode, search for an open context with the desired characteristics
955 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
957 struct nfs_inode
*nfsi
= NFS_I(inode
);
958 struct nfs_open_context
*pos
, *ctx
= NULL
;
960 spin_lock(&inode
->i_lock
);
961 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
962 if (cred
!= NULL
&& pos
->cred
!= cred
)
964 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
966 ctx
= get_nfs_open_context(pos
);
969 spin_unlock(&inode
->i_lock
);
973 void nfs_file_clear_open_context(struct file
*filp
)
975 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
978 struct inode
*inode
= d_inode(ctx
->dentry
);
981 * We fatal error on write before. Try to writeback
985 invalidate_inode_pages2(inode
->i_mapping
);
986 filp
->private_data
= NULL
;
987 spin_lock(&inode
->i_lock
);
988 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
989 spin_unlock(&inode
->i_lock
);
990 put_nfs_open_context_sync(ctx
);
995 * These allocate and release file read/write context information.
997 int nfs_open(struct inode
*inode
, struct file
*filp
)
999 struct nfs_open_context
*ctx
;
1001 ctx
= alloc_nfs_open_context(file_dentry(filp
), filp
->f_mode
, filp
);
1003 return PTR_ERR(ctx
);
1004 nfs_file_set_open_context(filp
, ctx
);
1005 put_nfs_open_context(ctx
);
1006 nfs_fscache_open_file(inode
, filp
);
1011 * This function is called whenever some part of NFS notices that
1012 * the cached attributes have to be refreshed.
1015 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1017 int status
= -ESTALE
;
1018 struct nfs4_label
*label
= NULL
;
1019 struct nfs_fattr
*fattr
= NULL
;
1020 struct nfs_inode
*nfsi
= NFS_I(inode
);
1022 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
1023 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
1025 trace_nfs_revalidate_inode_enter(inode
);
1027 if (is_bad_inode(inode
))
1029 if (NFS_STALE(inode
))
1032 /* pNFS: Attributes aren't updated until we layoutcommit */
1033 if (S_ISREG(inode
->i_mode
)) {
1034 status
= pnfs_sync_inode(inode
, false);
1040 fattr
= nfs_alloc_fattr();
1044 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
1046 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
1047 if (IS_ERR(label
)) {
1048 status
= PTR_ERR(label
);
1052 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
1054 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
1056 (unsigned long long)NFS_FILEID(inode
), status
);
1057 if (status
== -ESTALE
) {
1058 nfs_zap_caches(inode
);
1059 if (!S_ISDIR(inode
->i_mode
))
1060 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
1065 status
= nfs_refresh_inode(inode
, fattr
);
1067 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1069 (unsigned long long)NFS_FILEID(inode
), status
);
1073 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
1074 nfs_zap_acl_cache(inode
);
1076 nfs_setsecurity(inode
, fattr
, label
);
1078 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
1080 (unsigned long long)NFS_FILEID(inode
));
1083 nfs4_label_free(label
);
1085 nfs_free_fattr(fattr
);
1086 trace_nfs_revalidate_inode_exit(inode
, status
);
1090 int nfs_attribute_cache_expired(struct inode
*inode
)
1092 if (nfs_have_delegated_attributes(inode
))
1094 return nfs_attribute_timeout(inode
);
1098 * nfs_revalidate_inode - Revalidate the inode attributes
1099 * @server - pointer to nfs_server struct
1100 * @inode - pointer to inode struct
1102 * Updates inode attribute information by retrieving the data from the server.
1104 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1106 if (!nfs_need_revalidate_inode(inode
))
1107 return NFS_STALE(inode
) ? -ESTALE
: 0;
1108 return __nfs_revalidate_inode(server
, inode
);
1110 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1112 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1114 struct nfs_inode
*nfsi
= NFS_I(inode
);
1117 if (mapping
->nrpages
!= 0) {
1118 if (S_ISREG(inode
->i_mode
)) {
1119 unmap_mapping_range(mapping
, 0, 0, 0);
1120 ret
= nfs_sync_mapping(mapping
);
1124 ret
= invalidate_inode_pages2(mapping
);
1128 if (S_ISDIR(inode
->i_mode
)) {
1129 spin_lock(&inode
->i_lock
);
1130 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1131 spin_unlock(&inode
->i_lock
);
1133 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1134 nfs_fscache_wait_on_invalidate(inode
);
1136 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1138 (unsigned long long)NFS_FILEID(inode
));
1142 bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1144 return nfs_check_cache_invalid(inode
, NFS_INO_REVAL_PAGECACHE
) ||
1148 int nfs_revalidate_mapping_rcu(struct inode
*inode
)
1150 struct nfs_inode
*nfsi
= NFS_I(inode
);
1151 unsigned long *bitlock
= &nfsi
->flags
;
1154 if (IS_SWAPFILE(inode
))
1156 if (nfs_mapping_need_revalidate_inode(inode
)) {
1160 spin_lock(&inode
->i_lock
);
1161 if (test_bit(NFS_INO_INVALIDATING
, bitlock
) ||
1162 (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
))
1164 spin_unlock(&inode
->i_lock
);
1170 * nfs_revalidate_mapping - Revalidate the pagecache
1171 * @inode - pointer to host inode
1172 * @mapping - pointer to mapping
1174 int nfs_revalidate_mapping(struct inode
*inode
,
1175 struct address_space
*mapping
)
1177 struct nfs_inode
*nfsi
= NFS_I(inode
);
1178 unsigned long *bitlock
= &nfsi
->flags
;
1181 /* swapfiles are not supposed to be shared. */
1182 if (IS_SWAPFILE(inode
))
1185 if (nfs_mapping_need_revalidate_inode(inode
)) {
1186 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1192 * We must clear NFS_INO_INVALID_DATA first to ensure that
1193 * invalidations that come in while we're shooting down the mappings
1194 * are respected. But, that leaves a race window where one revalidator
1195 * can clear the flag, and then another checks it before the mapping
1196 * gets invalidated. Fix that by serializing access to this part of
1199 * At the same time, we need to allow other tasks to see whether we
1200 * might be in the middle of invalidating the pages, so we only set
1201 * the bit lock here if it looks like we're going to be doing that.
1204 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1205 nfs_wait_bit_killable
, TASK_KILLABLE
);
1208 spin_lock(&inode
->i_lock
);
1209 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1210 spin_unlock(&inode
->i_lock
);
1213 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1215 spin_unlock(&inode
->i_lock
);
1219 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1221 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1222 spin_unlock(&inode
->i_lock
);
1223 trace_nfs_invalidate_mapping_enter(inode
);
1224 ret
= nfs_invalidate_mapping(inode
, mapping
);
1225 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1227 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1228 smp_mb__after_atomic();
1229 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1234 static bool nfs_file_has_writers(struct nfs_inode
*nfsi
)
1236 struct inode
*inode
= &nfsi
->vfs_inode
;
1238 assert_spin_locked(&inode
->i_lock
);
1240 if (!S_ISREG(inode
->i_mode
))
1242 if (list_empty(&nfsi
->open_files
))
1244 /* Note: This relies on nfsi->open_files being ordered with writers
1245 * being placed at the head of the list.
1246 * See nfs_inode_attach_open_context()
1248 return (list_first_entry(&nfsi
->open_files
,
1249 struct nfs_open_context
,
1250 list
)->mode
& FMODE_WRITE
) == FMODE_WRITE
;
1253 static bool nfs_file_has_buffered_writers(struct nfs_inode
*nfsi
)
1255 return nfs_file_has_writers(nfsi
) && nfs_file_io_is_buffered(nfsi
);
1258 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1260 struct nfs_inode
*nfsi
= NFS_I(inode
);
1261 unsigned long ret
= 0;
1263 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1264 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1265 && inode
->i_version
== fattr
->pre_change_attr
) {
1266 inode
->i_version
= fattr
->change_attr
;
1267 if (S_ISDIR(inode
->i_mode
))
1268 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1269 ret
|= NFS_INO_INVALID_ATTR
;
1271 /* If we have atomic WCC data, we may update some attributes */
1272 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1273 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1274 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1275 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1276 ret
|= NFS_INO_INVALID_ATTR
;
1279 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1280 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1281 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1282 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1283 if (S_ISDIR(inode
->i_mode
))
1284 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1285 ret
|= NFS_INO_INVALID_ATTR
;
1287 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1288 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1289 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1290 && nfsi
->nrequests
== 0) {
1291 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1292 ret
|= NFS_INO_INVALID_ATTR
;
1299 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1300 * @inode - pointer to inode
1301 * @fattr - updated attributes
1303 * Verifies the attribute cache. If we have just changed the attributes,
1304 * so that fattr carries weak cache consistency data, then it may
1305 * also update the ctime/mtime/change_attribute.
1307 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1309 struct nfs_inode
*nfsi
= NFS_I(inode
);
1310 loff_t cur_size
, new_isize
;
1311 unsigned long invalid
= 0;
1314 if (nfs_have_delegated_attributes(inode
))
1316 /* Has the inode gone and changed behind our back? */
1317 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1319 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1322 if (!nfs_file_has_buffered_writers(nfsi
)) {
1323 /* Verify a few of the more important attributes */
1324 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 && inode
->i_version
!= fattr
->change_attr
)
1325 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_REVAL_PAGECACHE
;
1327 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1328 invalid
|= NFS_INO_INVALID_ATTR
;
1330 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) && !timespec_equal(&inode
->i_ctime
, &fattr
->ctime
))
1331 invalid
|= NFS_INO_INVALID_ATTR
;
1333 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1334 cur_size
= i_size_read(inode
);
1335 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1336 if (cur_size
!= new_isize
)
1337 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1341 /* Have any file permissions changed? */
1342 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1343 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1344 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1345 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1346 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1347 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1349 /* Has the link count changed? */
1350 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1351 invalid
|= NFS_INO_INVALID_ATTR
;
1353 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1354 invalid
|= NFS_INO_INVALID_ATIME
;
1357 nfs_set_cache_invalid(inode
, invalid
| NFS_INO_REVAL_FORCED
);
1359 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1363 static atomic_long_t nfs_attr_generation_counter
;
1365 static unsigned long nfs_read_attr_generation_counter(void)
1367 return atomic_long_read(&nfs_attr_generation_counter
);
1370 unsigned long nfs_inc_attr_generation_counter(void)
1372 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1374 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter
);
1376 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1379 fattr
->time_start
= jiffies
;
1380 fattr
->gencount
= nfs_inc_attr_generation_counter();
1381 fattr
->owner_name
= NULL
;
1382 fattr
->group_name
= NULL
;
1384 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1387 * nfs_fattr_set_barrier
1388 * @fattr: attributes
1390 * Used to set a barrier after an attribute was updated. This
1391 * barrier ensures that older attributes from RPC calls that may
1392 * have raced with our update cannot clobber these new values.
1393 * Note that you are still responsible for ensuring that other
1394 * operations which change the attribute on the server do not
1397 void nfs_fattr_set_barrier(struct nfs_fattr
*fattr
)
1399 fattr
->gencount
= nfs_inc_attr_generation_counter();
1402 struct nfs_fattr
*nfs_alloc_fattr(void)
1404 struct nfs_fattr
*fattr
;
1406 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1408 nfs_fattr_init(fattr
);
1411 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1413 struct nfs_fh
*nfs_alloc_fhandle(void)
1417 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1422 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1426 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1427 * in the same way that wireshark does
1431 * For debugging only.
1433 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1435 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1436 * not on the result */
1437 return nfs_fhandle_hash(fh
);
1439 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1442 * _nfs_display_fhandle - display an NFS file handle on the console
1444 * @fh: file handle to display
1445 * @caption: display caption
1447 * For debugging only.
1449 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1453 if (fh
== NULL
|| fh
->size
== 0) {
1454 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1458 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1459 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1460 for (i
= 0; i
< fh
->size
; i
+= 16) {
1461 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1463 switch ((fh
->size
- i
- 1) >> 2) {
1465 printk(KERN_DEFAULT
" %08x\n",
1469 printk(KERN_DEFAULT
" %08x %08x\n",
1470 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1473 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1474 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1475 be32_to_cpup(pos
+ 2));
1478 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1479 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1480 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1484 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1488 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1489 * @inode - pointer to inode
1490 * @fattr - attributes
1492 * Attempt to divine whether or not an RPC call reply carrying stale
1493 * attributes got scheduled after another call carrying updated ones.
1495 * To do so, the function first assumes that a more recent ctime means
1496 * that the attributes in fattr are newer, however it also attempt to
1497 * catch the case where ctime either didn't change, or went backwards
1498 * (if someone reset the clock on the server) by looking at whether
1499 * or not this RPC call was started after the inode was last updated.
1500 * Note also the check for wraparound of 'attr_gencount'
1502 * The function returns 'true' if it thinks the attributes in 'fattr' are
1503 * more recent than the ones cached in the inode.
1506 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1508 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1510 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1511 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1514 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1518 trace_nfs_refresh_inode_enter(inode
);
1520 if (nfs_inode_attrs_need_update(inode
, fattr
))
1521 ret
= nfs_update_inode(inode
, fattr
);
1523 ret
= nfs_check_inode_attributes(inode
, fattr
);
1525 trace_nfs_refresh_inode_exit(inode
, ret
);
1530 * nfs_refresh_inode - try to update the inode attribute cache
1531 * @inode - pointer to inode
1532 * @fattr - updated attributes
1534 * Check that an RPC call that returned attributes has not overlapped with
1535 * other recent updates of the inode metadata, then decide whether it is
1536 * safe to do a full update of the inode attributes, or whether just to
1537 * call nfs_check_inode_attributes.
1539 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1543 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1545 spin_lock(&inode
->i_lock
);
1546 status
= nfs_refresh_inode_locked(inode
, fattr
);
1547 spin_unlock(&inode
->i_lock
);
1551 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1553 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1555 unsigned long invalid
= NFS_INO_INVALID_ATTR
;
1557 if (S_ISDIR(inode
->i_mode
))
1558 invalid
|= NFS_INO_INVALID_DATA
;
1559 nfs_set_cache_invalid(inode
, invalid
);
1560 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1562 return nfs_refresh_inode_locked(inode
, fattr
);
1566 * nfs_post_op_update_inode - try to update the inode attribute cache
1567 * @inode - pointer to inode
1568 * @fattr - updated attributes
1570 * After an operation that has changed the inode metadata, mark the
1571 * attribute cache as being invalid, then try to update it.
1573 * NB: if the server didn't return any post op attributes, this
1574 * function will force the retrieval of attributes before the next
1575 * NFS request. Thus it should be used only for operations that
1576 * are expected to change one or more attributes, to avoid
1577 * unnecessary NFS requests and trips through nfs_update_inode().
1579 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1583 spin_lock(&inode
->i_lock
);
1584 nfs_fattr_set_barrier(fattr
);
1585 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1586 spin_unlock(&inode
->i_lock
);
1590 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1593 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1594 * @inode - pointer to inode
1595 * @fattr - updated attributes
1597 * After an operation that has changed the inode metadata, mark the
1598 * attribute cache as being invalid, then try to update it. Fake up
1599 * weak cache consistency data, if none exist.
1601 * This function is mainly designed to be used by the ->write_done() functions.
1603 int nfs_post_op_update_inode_force_wcc_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1607 /* Don't do a WCC update if these attributes are already stale */
1608 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1609 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1610 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1611 | NFS_ATTR_FATTR_PRESIZE
1612 | NFS_ATTR_FATTR_PREMTIME
1613 | NFS_ATTR_FATTR_PRECTIME
);
1616 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1617 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1618 fattr
->pre_change_attr
= inode
->i_version
;
1619 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1621 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1622 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1623 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1624 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1626 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1627 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1628 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1629 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1631 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1632 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1633 fattr
->pre_size
= i_size_read(inode
);
1634 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1637 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1642 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1643 * @inode - pointer to inode
1644 * @fattr - updated attributes
1646 * After an operation that has changed the inode metadata, mark the
1647 * attribute cache as being invalid, then try to update it. Fake up
1648 * weak cache consistency data, if none exist.
1650 * This function is mainly designed to be used by the ->write_done() functions.
1652 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1656 spin_lock(&inode
->i_lock
);
1657 nfs_fattr_set_barrier(fattr
);
1658 status
= nfs_post_op_update_inode_force_wcc_locked(inode
, fattr
);
1659 spin_unlock(&inode
->i_lock
);
1662 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1665 static inline bool nfs_fileid_valid(struct nfs_inode
*nfsi
,
1666 struct nfs_fattr
*fattr
)
1668 bool ret1
= true, ret2
= true;
1670 if (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)
1671 ret1
= (nfsi
->fileid
== fattr
->fileid
);
1672 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
)
1673 ret2
= (nfsi
->fileid
== fattr
->mounted_on_fileid
);
1674 return ret1
|| ret2
;
1678 * Many nfs protocol calls return the new file attributes after
1679 * an operation. Here we update the inode to reflect the state
1680 * of the server's inode.
1682 * This is a bit tricky because we have to make sure all dirty pages
1683 * have been sent off to the server before calling invalidate_inode_pages.
1684 * To make sure no other process adds more write requests while we try
1685 * our best to flush them, we make them sleep during the attribute refresh.
1687 * A very similar scenario holds for the dir cache.
1689 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1691 struct nfs_server
*server
;
1692 struct nfs_inode
*nfsi
= NFS_I(inode
);
1693 loff_t cur_isize
, new_isize
;
1694 unsigned long invalid
= 0;
1695 unsigned long now
= jiffies
;
1696 unsigned long save_cache_validity
;
1697 bool have_writers
= nfs_file_has_buffered_writers(nfsi
);
1698 bool cache_revalidated
= true;
1700 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1701 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1702 nfs_display_fhandle_hash(NFS_FH(inode
)),
1703 atomic_read(&inode
->i_count
), fattr
->valid
);
1705 if (!nfs_fileid_valid(nfsi
, fattr
)) {
1706 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1707 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1708 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1709 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1710 (long long)fattr
->fileid
);
1715 * Make sure the inode's type hasn't changed.
1717 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1719 * Big trouble! The inode has become a different object.
1721 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1722 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1726 server
= NFS_SERVER(inode
);
1727 /* Update the fsid? */
1728 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1729 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1730 !IS_AUTOMOUNT(inode
))
1731 server
->fsid
= fattr
->fsid
;
1734 * Update the read time so we don't revalidate too often.
1736 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1738 save_cache_validity
= nfsi
->cache_validity
;
1739 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1740 | NFS_INO_INVALID_ATIME
1741 | NFS_INO_REVAL_FORCED
1742 | NFS_INO_REVAL_PAGECACHE
);
1744 /* Do atomic weak cache consistency updates */
1745 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1747 if (pnfs_layoutcommit_outstanding(inode
)) {
1748 nfsi
->cache_validity
|= save_cache_validity
& NFS_INO_INVALID_ATTR
;
1749 cache_revalidated
= false;
1752 /* More cache consistency checks */
1753 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1754 if (inode
->i_version
!= fattr
->change_attr
) {
1755 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1756 inode
->i_sb
->s_id
, inode
->i_ino
);
1757 /* Could it be a race with writeback? */
1758 if (!have_writers
) {
1759 invalid
|= NFS_INO_INVALID_ATTR
1760 | NFS_INO_INVALID_DATA
1761 | NFS_INO_INVALID_ACCESS
1762 | NFS_INO_INVALID_ACL
;
1763 if (S_ISDIR(inode
->i_mode
))
1764 nfs_force_lookup_revalidate(inode
);
1766 inode
->i_version
= fattr
->change_attr
;
1769 nfsi
->cache_validity
|= save_cache_validity
;
1770 cache_revalidated
= false;
1773 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1774 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1775 } else if (server
->caps
& NFS_CAP_MTIME
) {
1776 nfsi
->cache_validity
|= save_cache_validity
&
1777 (NFS_INO_INVALID_ATTR
1778 | NFS_INO_REVAL_FORCED
);
1779 cache_revalidated
= false;
1782 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1783 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1784 } else if (server
->caps
& NFS_CAP_CTIME
) {
1785 nfsi
->cache_validity
|= save_cache_validity
&
1786 (NFS_INO_INVALID_ATTR
1787 | NFS_INO_REVAL_FORCED
);
1788 cache_revalidated
= false;
1791 /* Check if our cached file size is stale */
1792 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1793 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1794 cur_isize
= i_size_read(inode
);
1795 if (new_isize
!= cur_isize
) {
1796 /* Do we perhaps have any outstanding writes, or has
1797 * the file grown beyond our last write? */
1798 if (nfsi
->nrequests
== 0 || new_isize
> cur_isize
) {
1799 i_size_write(inode
, new_isize
);
1801 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1803 dprintk("NFS: isize change on server for file %s/%ld "
1807 (long long)cur_isize
,
1808 (long long)new_isize
);
1811 nfsi
->cache_validity
|= save_cache_validity
&
1812 (NFS_INO_INVALID_ATTR
1813 | NFS_INO_REVAL_PAGECACHE
1814 | NFS_INO_REVAL_FORCED
);
1815 cache_revalidated
= false;
1819 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1820 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1821 else if (server
->caps
& NFS_CAP_ATIME
) {
1822 nfsi
->cache_validity
|= save_cache_validity
&
1823 (NFS_INO_INVALID_ATIME
1824 | NFS_INO_REVAL_FORCED
);
1825 cache_revalidated
= false;
1828 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1829 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1830 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1831 newmode
|= fattr
->mode
& S_IALLUGO
;
1832 inode
->i_mode
= newmode
;
1833 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1835 } else if (server
->caps
& NFS_CAP_MODE
) {
1836 nfsi
->cache_validity
|= save_cache_validity
&
1837 (NFS_INO_INVALID_ATTR
1838 | NFS_INO_INVALID_ACCESS
1839 | NFS_INO_INVALID_ACL
1840 | NFS_INO_REVAL_FORCED
);
1841 cache_revalidated
= false;
1844 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1845 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1846 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1847 inode
->i_uid
= fattr
->uid
;
1849 } else if (server
->caps
& NFS_CAP_OWNER
) {
1850 nfsi
->cache_validity
|= save_cache_validity
&
1851 (NFS_INO_INVALID_ATTR
1852 | NFS_INO_INVALID_ACCESS
1853 | NFS_INO_INVALID_ACL
1854 | NFS_INO_REVAL_FORCED
);
1855 cache_revalidated
= false;
1858 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1859 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1860 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1861 inode
->i_gid
= fattr
->gid
;
1863 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
) {
1864 nfsi
->cache_validity
|= save_cache_validity
&
1865 (NFS_INO_INVALID_ATTR
1866 | NFS_INO_INVALID_ACCESS
1867 | NFS_INO_INVALID_ACL
1868 | NFS_INO_REVAL_FORCED
);
1869 cache_revalidated
= false;
1872 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1873 if (inode
->i_nlink
!= fattr
->nlink
) {
1874 invalid
|= NFS_INO_INVALID_ATTR
;
1875 if (S_ISDIR(inode
->i_mode
))
1876 invalid
|= NFS_INO_INVALID_DATA
;
1877 set_nlink(inode
, fattr
->nlink
);
1879 } else if (server
->caps
& NFS_CAP_NLINK
) {
1880 nfsi
->cache_validity
|= save_cache_validity
&
1881 (NFS_INO_INVALID_ATTR
1882 | NFS_INO_REVAL_FORCED
);
1883 cache_revalidated
= false;
1886 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1888 * report the blocks in 512byte units
1890 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1891 } else if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1892 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1894 cache_revalidated
= false;
1896 /* Update attrtimeo value if we're out of the unstable period */
1897 if (invalid
& NFS_INO_INVALID_ATTR
) {
1898 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1899 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1900 nfsi
->attrtimeo_timestamp
= now
;
1901 /* Set barrier to be more recent than all outstanding updates */
1902 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1904 if (cache_revalidated
) {
1905 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
,
1906 nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1907 nfsi
->attrtimeo
<<= 1;
1908 if (nfsi
->attrtimeo
> NFS_MAXATTRTIMEO(inode
))
1909 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1911 nfsi
->attrtimeo_timestamp
= now
;
1913 /* Set the barrier to be more recent than this fattr */
1914 if ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
> 0)
1915 nfsi
->attr_gencount
= fattr
->gencount
;
1918 /* Don't declare attrcache up to date if there were no attrs! */
1919 if (cache_revalidated
)
1920 invalid
&= ~NFS_INO_INVALID_ATTR
;
1922 /* Don't invalidate the data if we were to blame */
1923 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1924 || S_ISLNK(inode
->i_mode
)))
1925 invalid
&= ~NFS_INO_INVALID_DATA
;
1926 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1927 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1928 nfs_set_cache_invalid(inode
, invalid
);
1933 * No need to worry about unhashing the dentry, as the
1934 * lookup validation will know that the inode is bad.
1935 * (But we fall through to invalidate the caches.)
1937 nfs_invalidate_inode(inode
);
1941 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1943 struct nfs_inode
*nfsi
;
1944 nfsi
= kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1948 nfsi
->cache_validity
= 0UL;
1949 #if IS_ENABLED(CONFIG_NFS_V4)
1950 nfsi
->nfs4_acl
= NULL
;
1951 #endif /* CONFIG_NFS_V4 */
1952 return &nfsi
->vfs_inode
;
1954 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1956 static void nfs_i_callback(struct rcu_head
*head
)
1958 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1959 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1962 void nfs_destroy_inode(struct inode
*inode
)
1964 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1966 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1968 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1970 #if IS_ENABLED(CONFIG_NFS_V4)
1971 INIT_LIST_HEAD(&nfsi
->open_states
);
1972 nfsi
->delegation
= NULL
;
1973 init_rwsem(&nfsi
->rwsem
);
1974 nfsi
->layout
= NULL
;
1978 static void init_once(void *foo
)
1980 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1982 inode_init_once(&nfsi
->vfs_inode
);
1983 INIT_LIST_HEAD(&nfsi
->open_files
);
1984 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1985 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1986 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1987 nfsi
->nrequests
= 0;
1988 nfsi
->commit_info
.ncommit
= 0;
1989 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1990 init_rwsem(&nfsi
->rmdir_sem
);
1991 nfs4_init_once(nfsi
);
1994 static int __init
nfs_init_inodecache(void)
1996 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1997 sizeof(struct nfs_inode
),
1998 0, (SLAB_RECLAIM_ACCOUNT
|
1999 SLAB_MEM_SPREAD
|SLAB_ACCOUNT
),
2001 if (nfs_inode_cachep
== NULL
)
2007 static void nfs_destroy_inodecache(void)
2010 * Make sure all delayed rcu free inodes are flushed before we
2014 kmem_cache_destroy(nfs_inode_cachep
);
2017 struct workqueue_struct
*nfsiod_workqueue
;
2018 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
2021 * start up the nfsiod workqueue
2023 static int nfsiod_start(void)
2025 struct workqueue_struct
*wq
;
2026 dprintk("RPC: creating workqueue nfsiod\n");
2027 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
2030 nfsiod_workqueue
= wq
;
2035 * Destroy the nfsiod workqueue
2037 static void nfsiod_stop(void)
2039 struct workqueue_struct
*wq
;
2041 wq
= nfsiod_workqueue
;
2044 nfsiod_workqueue
= NULL
;
2045 destroy_workqueue(wq
);
2048 unsigned int nfs_net_id
;
2049 EXPORT_SYMBOL_GPL(nfs_net_id
);
2051 static int nfs_net_init(struct net
*net
)
2053 nfs_clients_init(net
);
2054 return nfs_fs_proc_net_init(net
);
2057 static void nfs_net_exit(struct net
*net
)
2059 nfs_fs_proc_net_exit(net
);
2060 nfs_cleanup_cb_ident_idr(net
);
2063 static struct pernet_operations nfs_net_ops
= {
2064 .init
= nfs_net_init
,
2065 .exit
= nfs_net_exit
,
2067 .size
= sizeof(struct nfs_net
),
2073 static int __init
init_nfs_fs(void)
2077 err
= register_pernet_subsys(&nfs_net_ops
);
2081 err
= nfs_fscache_register();
2085 err
= nfsiod_start();
2089 err
= nfs_fs_proc_init();
2093 err
= nfs_init_nfspagecache();
2097 err
= nfs_init_inodecache();
2101 err
= nfs_init_readpagecache();
2105 err
= nfs_init_writepagecache();
2109 err
= nfs_init_directcache();
2113 rpc_proc_register(&init_net
, &nfs_rpcstat
);
2115 err
= register_nfs_fs();
2121 rpc_proc_unregister(&init_net
, "nfs");
2122 nfs_destroy_directcache();
2124 nfs_destroy_writepagecache();
2126 nfs_destroy_readpagecache();
2128 nfs_destroy_inodecache();
2130 nfs_destroy_nfspagecache();
2136 nfs_fscache_unregister();
2138 unregister_pernet_subsys(&nfs_net_ops
);
2143 static void __exit
exit_nfs_fs(void)
2145 nfs_destroy_directcache();
2146 nfs_destroy_writepagecache();
2147 nfs_destroy_readpagecache();
2148 nfs_destroy_inodecache();
2149 nfs_destroy_nfspagecache();
2150 nfs_fscache_unregister();
2151 unregister_pernet_subsys(&nfs_net_ops
);
2152 rpc_proc_unregister(&init_net
, "nfs");
2153 unregister_nfs_fs();
2158 /* Not quite true; I just maintain it */
2159 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2160 MODULE_LICENSE("GPL");
2161 module_param(enable_ino64
, bool, 0644);
2163 module_init(init_nfs_fs
)
2164 module_exit(exit_nfs_fs
)