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
);
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 nfs_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 void nfs_set_cache_invalid(struct inode
*inode
, unsigned long flags
)
165 struct nfs_inode
*nfsi
= NFS_I(inode
);
167 if (inode
->i_mapping
->nrpages
== 0)
168 flags
&= ~NFS_INO_INVALID_DATA
;
169 nfsi
->cache_validity
|= flags
;
170 if (flags
& NFS_INO_INVALID_DATA
)
171 nfs_fscache_invalidate(inode
);
175 * Invalidate the local caches
177 static void nfs_zap_caches_locked(struct inode
*inode
)
179 struct nfs_inode
*nfsi
= NFS_I(inode
);
180 int mode
= inode
->i_mode
;
182 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
184 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
185 nfsi
->attrtimeo_timestamp
= jiffies
;
187 memset(NFS_I(inode
)->cookieverf
, 0, sizeof(NFS_I(inode
)->cookieverf
));
188 if (S_ISREG(mode
) || S_ISDIR(mode
) || S_ISLNK(mode
)) {
189 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
190 | NFS_INO_INVALID_DATA
191 | NFS_INO_INVALID_ACCESS
192 | NFS_INO_INVALID_ACL
193 | NFS_INO_REVAL_PAGECACHE
);
195 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
196 | NFS_INO_INVALID_ACCESS
197 | NFS_INO_INVALID_ACL
198 | NFS_INO_REVAL_PAGECACHE
);
199 nfs_zap_label_cache_locked(nfsi
);
202 void nfs_zap_caches(struct inode
*inode
)
204 spin_lock(&inode
->i_lock
);
205 nfs_zap_caches_locked(inode
);
206 spin_unlock(&inode
->i_lock
);
209 void nfs_zap_mapping(struct inode
*inode
, struct address_space
*mapping
)
211 if (mapping
->nrpages
!= 0) {
212 spin_lock(&inode
->i_lock
);
213 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
214 spin_unlock(&inode
->i_lock
);
218 void nfs_zap_acl_cache(struct inode
*inode
)
220 void (*clear_acl_cache
)(struct inode
*);
222 clear_acl_cache
= NFS_PROTO(inode
)->clear_acl_cache
;
223 if (clear_acl_cache
!= NULL
)
224 clear_acl_cache(inode
);
225 spin_lock(&inode
->i_lock
);
226 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_ACL
;
227 spin_unlock(&inode
->i_lock
);
229 EXPORT_SYMBOL_GPL(nfs_zap_acl_cache
);
231 void nfs_invalidate_atime(struct inode
*inode
)
233 spin_lock(&inode
->i_lock
);
234 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATIME
);
235 spin_unlock(&inode
->i_lock
);
237 EXPORT_SYMBOL_GPL(nfs_invalidate_atime
);
240 * Invalidate, but do not unhash, the inode.
241 * NB: must be called with inode->i_lock held!
243 static void nfs_invalidate_inode(struct inode
*inode
)
245 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
246 nfs_zap_caches_locked(inode
);
249 struct nfs_find_desc
{
251 struct nfs_fattr
*fattr
;
255 * In NFSv3 we can have 64bit inode numbers. In order to support
256 * this, and re-exported directories (also seen in NFSv2)
257 * we are forced to allow 2 different inodes to have the same
261 nfs_find_actor(struct inode
*inode
, void *opaque
)
263 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
264 struct nfs_fh
*fh
= desc
->fh
;
265 struct nfs_fattr
*fattr
= desc
->fattr
;
267 if (NFS_FILEID(inode
) != fattr
->fileid
)
269 if ((S_IFMT
& inode
->i_mode
) != (S_IFMT
& fattr
->mode
))
271 if (nfs_compare_fh(NFS_FH(inode
), fh
))
273 if (is_bad_inode(inode
) || NFS_STALE(inode
))
279 nfs_init_locked(struct inode
*inode
, void *opaque
)
281 struct nfs_find_desc
*desc
= (struct nfs_find_desc
*)opaque
;
282 struct nfs_fattr
*fattr
= desc
->fattr
;
284 set_nfs_fileid(inode
, fattr
->fileid
);
285 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
289 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
290 static void nfs_clear_label_invalid(struct inode
*inode
)
292 spin_lock(&inode
->i_lock
);
293 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_LABEL
;
294 spin_unlock(&inode
->i_lock
);
297 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
298 struct nfs4_label
*label
)
305 if ((fattr
->valid
& NFS_ATTR_FATTR_V4_SECURITY_LABEL
) && inode
->i_security
) {
306 error
= security_inode_notifysecctx(inode
, label
->label
,
309 printk(KERN_ERR
"%s() %s %d "
310 "security_inode_notifysecctx() %d\n",
312 (char *)label
->label
,
314 nfs_clear_label_invalid(inode
);
318 struct nfs4_label
*nfs4_label_alloc(struct nfs_server
*server
, gfp_t flags
)
320 struct nfs4_label
*label
= NULL
;
321 int minor_version
= server
->nfs_client
->cl_minorversion
;
323 if (minor_version
< 2)
326 if (!(server
->caps
& NFS_CAP_SECURITY_LABEL
))
329 label
= kzalloc(sizeof(struct nfs4_label
), flags
);
331 return ERR_PTR(-ENOMEM
);
333 label
->label
= kzalloc(NFS4_MAXLABELLEN
, flags
);
334 if (label
->label
== NULL
) {
336 return ERR_PTR(-ENOMEM
);
338 label
->len
= NFS4_MAXLABELLEN
;
342 EXPORT_SYMBOL_GPL(nfs4_label_alloc
);
344 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
345 struct nfs4_label
*label
)
349 EXPORT_SYMBOL_GPL(nfs_setsecurity
);
352 * This is our front-end to iget that looks up inodes by file handle
353 * instead of inode number.
356 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
, struct nfs4_label
*label
)
358 struct nfs_find_desc desc
= {
362 struct inode
*inode
= ERR_PTR(-ENOENT
);
365 nfs_attr_check_mountpoint(sb
, fattr
);
367 if (nfs_attr_use_mounted_on_fileid(fattr
))
368 fattr
->fileid
= fattr
->mounted_on_fileid
;
369 else if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
371 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
374 hash
= nfs_fattr_to_ino_t(fattr
);
376 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
378 inode
= ERR_PTR(-ENOMEM
);
382 if (inode
->i_state
& I_NEW
) {
383 struct nfs_inode
*nfsi
= NFS_I(inode
);
384 unsigned long now
= jiffies
;
386 /* We set i_ino for the few things that still rely on it,
390 /* We can't support update_atime(), since the server will reset it */
391 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
392 inode
->i_mode
= fattr
->mode
;
393 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
394 && nfs_server_capable(inode
, NFS_CAP_MODE
))
395 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
396 /* Why so? Because we want revalidate for devices/FIFOs, and
397 * that's precisely what we have in nfs_file_inode_operations.
399 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
400 if (S_ISREG(inode
->i_mode
)) {
401 inode
->i_fop
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_ops
;
402 inode
->i_data
.a_ops
= &nfs_file_aops
;
403 } else if (S_ISDIR(inode
->i_mode
)) {
404 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
405 inode
->i_fop
= &nfs_dir_operations
;
406 inode
->i_data
.a_ops
= &nfs_dir_aops
;
407 /* Deal with crossing mountpoints */
408 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
409 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
410 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
411 inode
->i_op
= &nfs_referral_inode_operations
;
413 inode
->i_op
= &nfs_mountpoint_inode_operations
;
415 inode
->i_flags
|= S_AUTOMOUNT
;
417 } else if (S_ISLNK(inode
->i_mode
))
418 inode
->i_op
= &nfs_symlink_inode_operations
;
420 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
422 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
423 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
424 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
425 inode
->i_version
= 0;
428 inode
->i_uid
= make_kuid(&init_user_ns
, -2);
429 inode
->i_gid
= make_kgid(&init_user_ns
, -2);
431 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
435 nfsi
->read_cache_jiffies
= fattr
->time_start
;
436 nfsi
->attr_gencount
= fattr
->gencount
;
437 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
438 inode
->i_atime
= fattr
->atime
;
439 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
440 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
441 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
442 inode
->i_mtime
= fattr
->mtime
;
443 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
444 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
445 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
446 inode
->i_ctime
= fattr
->ctime
;
447 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
448 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
449 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
450 inode
->i_version
= fattr
->change_attr
;
452 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
453 | NFS_INO_REVAL_PAGECACHE
);
454 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
455 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
457 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
458 | NFS_INO_REVAL_PAGECACHE
);
459 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
460 set_nlink(inode
, fattr
->nlink
);
461 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
462 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
463 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
464 inode
->i_uid
= fattr
->uid
;
465 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
466 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
467 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
468 inode
->i_gid
= fattr
->gid
;
469 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
470 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
471 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
472 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
473 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
475 * report the blocks in 512byte units
477 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
480 nfs_setsecurity(inode
, fattr
, label
);
482 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
483 nfsi
->attrtimeo_timestamp
= now
;
484 nfsi
->access_cache
= RB_ROOT
;
486 nfs_fscache_init_inode(inode
);
488 unlock_new_inode(inode
);
490 nfs_refresh_inode(inode
, fattr
);
491 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
493 (unsigned long long)NFS_FILEID(inode
),
494 nfs_display_fhandle_hash(fh
),
495 atomic_read(&inode
->i_count
));
501 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
504 EXPORT_SYMBOL_GPL(nfs_fhget
);
506 #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)
509 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
511 struct inode
*inode
= d_inode(dentry
);
512 struct nfs_fattr
*fattr
;
515 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
517 /* skip mode change if it's just for clearing setuid/setgid */
518 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
519 attr
->ia_valid
&= ~ATTR_MODE
;
521 if (attr
->ia_valid
& ATTR_SIZE
) {
522 BUG_ON(!S_ISREG(inode
->i_mode
));
524 error
= inode_newsize_ok(inode
, attr
->ia_size
);
528 if (attr
->ia_size
== i_size_read(inode
))
529 attr
->ia_valid
&= ~ATTR_SIZE
;
532 /* Optimization: if the end result is no change, don't RPC */
533 attr
->ia_valid
&= NFS_VALID_ATTRS
;
534 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
537 trace_nfs_setattr_enter(inode
);
539 /* Write all dirty data */
540 if (S_ISREG(inode
->i_mode
))
541 nfs_sync_inode(inode
);
543 fattr
= nfs_alloc_fattr();
550 * Return any delegations if we're going to change ACLs
552 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
553 NFS_PROTO(inode
)->return_delegation(inode
);
554 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
556 error
= nfs_refresh_inode(inode
, fattr
);
557 nfs_free_fattr(fattr
);
559 trace_nfs_setattr_exit(inode
, error
);
562 EXPORT_SYMBOL_GPL(nfs_setattr
);
565 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
566 * @inode: inode of the file used
567 * @offset: file offset to start truncating
569 * This is a copy of the common vmtruncate, but with the locking
570 * corrected to take into account the fact that NFS requires
571 * inode->i_size to be updated under the inode->i_lock.
572 * Note: must be called with inode->i_lock held!
574 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
578 err
= inode_newsize_ok(inode
, offset
);
582 i_size_write(inode
, offset
);
585 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
587 spin_unlock(&inode
->i_lock
);
588 truncate_pagecache(inode
, offset
);
589 spin_lock(&inode
->i_lock
);
595 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
596 * @inode: pointer to struct inode
597 * @attr: pointer to struct iattr
599 * Note: we do this in the *proc.c in order to ensure that
600 * it works for things like exclusive creates too.
602 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
,
603 struct nfs_fattr
*fattr
)
605 /* Barrier: bump the attribute generation count. */
606 nfs_fattr_set_barrier(fattr
);
608 spin_lock(&inode
->i_lock
);
609 NFS_I(inode
)->attr_gencount
= fattr
->gencount
;
610 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
611 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
612 int mode
= attr
->ia_mode
& S_IALLUGO
;
613 mode
|= inode
->i_mode
& ~S_IALLUGO
;
614 inode
->i_mode
= mode
;
616 if ((attr
->ia_valid
& ATTR_UID
) != 0)
617 inode
->i_uid
= attr
->ia_uid
;
618 if ((attr
->ia_valid
& ATTR_GID
) != 0)
619 inode
->i_gid
= attr
->ia_gid
;
620 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
621 | NFS_INO_INVALID_ACL
);
623 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
624 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
625 nfs_vmtruncate(inode
, attr
->ia_size
);
628 nfs_update_inode(inode
, fattr
);
630 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATTR
;
631 spin_unlock(&inode
->i_lock
);
633 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
635 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
637 struct dentry
*parent
;
639 parent
= dget_parent(dentry
);
640 nfs_force_use_readdirplus(d_inode(parent
));
644 static bool nfs_need_revalidate_inode(struct inode
*inode
)
646 if (NFS_I(inode
)->cache_validity
&
647 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
649 if (nfs_attribute_cache_expired(inode
))
654 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
656 struct inode
*inode
= d_inode(dentry
);
657 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
660 trace_nfs_getattr_enter(inode
);
661 /* Flush out writes to the server in order to update c/mtime. */
662 if (S_ISREG(inode
->i_mode
)) {
663 mutex_lock(&inode
->i_mutex
);
664 err
= nfs_sync_inode(inode
);
665 mutex_unlock(&inode
->i_mutex
);
671 * We may force a getattr if the user cares about atime.
673 * Note that we only have to check the vfsmount flags here:
674 * - NFS always sets S_NOATIME by so checking it would give a
676 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
677 * no point in checking those.
679 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
680 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
683 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
684 struct nfs_server
*server
= NFS_SERVER(inode
);
686 if (server
->caps
& NFS_CAP_READDIRPLUS
)
687 nfs_request_parent_use_readdirplus(dentry
);
688 err
= __nfs_revalidate_inode(server
, inode
);
691 generic_fillattr(inode
, stat
);
692 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
693 if (S_ISDIR(inode
->i_mode
))
694 stat
->blksize
= NFS_SERVER(inode
)->dtsize
;
697 trace_nfs_getattr_exit(inode
, err
);
700 EXPORT_SYMBOL_GPL(nfs_getattr
);
702 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
704 atomic_set(&l_ctx
->count
, 1);
705 l_ctx
->lockowner
.l_owner
= current
->files
;
706 l_ctx
->lockowner
.l_pid
= current
->tgid
;
707 INIT_LIST_HEAD(&l_ctx
->list
);
708 atomic_set(&l_ctx
->io_count
, 0);
711 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
713 struct nfs_lock_context
*head
= &ctx
->lock_context
;
714 struct nfs_lock_context
*pos
= head
;
717 if (pos
->lockowner
.l_owner
!= current
->files
)
719 if (pos
->lockowner
.l_pid
!= current
->tgid
)
721 atomic_inc(&pos
->count
);
723 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
727 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
729 struct nfs_lock_context
*res
, *new = NULL
;
730 struct inode
*inode
= d_inode(ctx
->dentry
);
732 spin_lock(&inode
->i_lock
);
733 res
= __nfs_find_lock_context(ctx
);
735 spin_unlock(&inode
->i_lock
);
736 new = kmalloc(sizeof(*new), GFP_KERNEL
);
738 return ERR_PTR(-ENOMEM
);
739 nfs_init_lock_context(new);
740 spin_lock(&inode
->i_lock
);
741 res
= __nfs_find_lock_context(ctx
);
743 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
744 new->open_context
= ctx
;
749 spin_unlock(&inode
->i_lock
);
753 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
755 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
757 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
758 struct inode
*inode
= d_inode(ctx
->dentry
);
760 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
762 list_del(&l_ctx
->list
);
763 spin_unlock(&inode
->i_lock
);
766 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
769 * nfs_close_context - Common close_context() routine NFSv2/v3
770 * @ctx: pointer to context
771 * @is_sync: is this a synchronous close
773 * Ensure that the attributes are up to date if we're mounted
774 * with close-to-open semantics and we have cached data that will
775 * need to be revalidated on open.
777 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
779 struct nfs_inode
*nfsi
;
781 struct nfs_server
*server
;
783 if (!(ctx
->mode
& FMODE_WRITE
))
787 inode
= d_inode(ctx
->dentry
);
789 if (inode
->i_mapping
->nrpages
== 0)
791 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
793 if (!list_empty(&nfsi
->open_files
))
795 server
= NFS_SERVER(inode
);
796 if (server
->flags
& NFS_MOUNT_NOCTO
)
798 nfs_revalidate_inode(server
, inode
);
800 EXPORT_SYMBOL_GPL(nfs_close_context
);
802 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
804 struct nfs_open_context
*ctx
;
805 struct rpc_cred
*cred
= rpc_lookup_cred();
807 return ERR_CAST(cred
);
809 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
812 return ERR_PTR(-ENOMEM
);
814 nfs_sb_active(dentry
->d_sb
);
815 ctx
->dentry
= dget(dentry
);
821 nfs_init_lock_context(&ctx
->lock_context
);
822 ctx
->lock_context
.open_context
= ctx
;
823 INIT_LIST_HEAD(&ctx
->list
);
824 ctx
->mdsthreshold
= NULL
;
827 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
829 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
832 atomic_inc(&ctx
->lock_context
.count
);
835 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
837 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
839 struct inode
*inode
= d_inode(ctx
->dentry
);
840 struct super_block
*sb
= ctx
->dentry
->d_sb
;
842 if (!list_empty(&ctx
->list
)) {
843 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
845 list_del(&ctx
->list
);
846 spin_unlock(&inode
->i_lock
);
847 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
850 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
851 if (ctx
->cred
!= NULL
)
852 put_rpccred(ctx
->cred
);
855 kfree(ctx
->mdsthreshold
);
859 void put_nfs_open_context(struct nfs_open_context
*ctx
)
861 __put_nfs_open_context(ctx
, 0);
863 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
865 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
867 __put_nfs_open_context(ctx
, 1);
871 * Ensure that mmap has a recent RPC credential for use when writing out
874 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
876 struct inode
*inode
= d_inode(ctx
->dentry
);
877 struct nfs_inode
*nfsi
= NFS_I(inode
);
879 spin_lock(&inode
->i_lock
);
880 list_add(&ctx
->list
, &nfsi
->open_files
);
881 spin_unlock(&inode
->i_lock
);
883 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
885 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
887 filp
->private_data
= get_nfs_open_context(ctx
);
888 if (list_empty(&ctx
->list
))
889 nfs_inode_attach_open_context(ctx
);
891 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
894 * Given an inode, search for an open context with the desired characteristics
896 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
898 struct nfs_inode
*nfsi
= NFS_I(inode
);
899 struct nfs_open_context
*pos
, *ctx
= NULL
;
901 spin_lock(&inode
->i_lock
);
902 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
903 if (cred
!= NULL
&& pos
->cred
!= cred
)
905 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
907 ctx
= get_nfs_open_context(pos
);
910 spin_unlock(&inode
->i_lock
);
914 void nfs_file_clear_open_context(struct file
*filp
)
916 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
919 struct inode
*inode
= d_inode(ctx
->dentry
);
922 * We fatal error on write before. Try to writeback
926 invalidate_inode_pages2(inode
->i_mapping
);
927 filp
->private_data
= NULL
;
928 spin_lock(&inode
->i_lock
);
929 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
930 spin_unlock(&inode
->i_lock
);
931 put_nfs_open_context_sync(ctx
);
936 * These allocate and release file read/write context information.
938 int nfs_open(struct inode
*inode
, struct file
*filp
)
940 struct nfs_open_context
*ctx
;
942 ctx
= alloc_nfs_open_context(filp
->f_path
.dentry
, filp
->f_mode
);
945 nfs_file_set_open_context(filp
, ctx
);
946 put_nfs_open_context(ctx
);
947 nfs_fscache_open_file(inode
, filp
);
952 * This function is called whenever some part of NFS notices that
953 * the cached attributes have to be refreshed.
956 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
958 int status
= -ESTALE
;
959 struct nfs4_label
*label
= NULL
;
960 struct nfs_fattr
*fattr
= NULL
;
961 struct nfs_inode
*nfsi
= NFS_I(inode
);
963 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
964 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
966 trace_nfs_revalidate_inode_enter(inode
);
968 if (is_bad_inode(inode
))
970 if (NFS_STALE(inode
))
974 fattr
= nfs_alloc_fattr();
978 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
980 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
982 status
= PTR_ERR(label
);
986 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
988 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
990 (unsigned long long)NFS_FILEID(inode
), status
);
991 if (status
== -ESTALE
) {
992 nfs_zap_caches(inode
);
993 if (!S_ISDIR(inode
->i_mode
))
994 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
999 status
= nfs_refresh_inode(inode
, fattr
);
1001 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1003 (unsigned long long)NFS_FILEID(inode
), status
);
1007 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
1008 nfs_zap_acl_cache(inode
);
1010 nfs_setsecurity(inode
, fattr
, label
);
1012 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
1014 (unsigned long long)NFS_FILEID(inode
));
1017 nfs4_label_free(label
);
1019 nfs_free_fattr(fattr
);
1020 trace_nfs_revalidate_inode_exit(inode
, status
);
1024 int nfs_attribute_timeout(struct inode
*inode
)
1026 struct nfs_inode
*nfsi
= NFS_I(inode
);
1028 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
1031 int nfs_attribute_cache_expired(struct inode
*inode
)
1033 if (nfs_have_delegated_attributes(inode
))
1035 return nfs_attribute_timeout(inode
);
1039 * nfs_revalidate_inode - Revalidate the inode attributes
1040 * @server - pointer to nfs_server struct
1041 * @inode - pointer to inode struct
1043 * Updates inode attribute information by retrieving the data from the server.
1045 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1047 if (!nfs_need_revalidate_inode(inode
))
1048 return NFS_STALE(inode
) ? -ESTALE
: 0;
1049 return __nfs_revalidate_inode(server
, inode
);
1051 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1053 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1055 if (!(NFS_I(inode
)->cache_validity
&
1056 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1057 && !nfs_attribute_cache_expired(inode
))
1058 return NFS_STALE(inode
) ? -ESTALE
: 0;
1062 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1064 struct nfs_inode
*nfsi
= NFS_I(inode
);
1067 if (mapping
->nrpages
!= 0) {
1068 if (S_ISREG(inode
->i_mode
)) {
1069 unmap_mapping_range(mapping
, 0, 0, 0);
1070 ret
= nfs_sync_mapping(mapping
);
1074 ret
= invalidate_inode_pages2(mapping
);
1078 if (S_ISDIR(inode
->i_mode
)) {
1079 spin_lock(&inode
->i_lock
);
1080 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1081 spin_unlock(&inode
->i_lock
);
1083 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1084 nfs_fscache_wait_on_invalidate(inode
);
1086 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1088 (unsigned long long)NFS_FILEID(inode
));
1092 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1094 if (nfs_have_delegated_attributes(inode
))
1096 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1097 || nfs_attribute_timeout(inode
)
1098 || NFS_STALE(inode
);
1102 * __nfs_revalidate_mapping - Revalidate the pagecache
1103 * @inode - pointer to host inode
1104 * @mapping - pointer to mapping
1105 * @may_lock - take inode->i_mutex?
1107 static int __nfs_revalidate_mapping(struct inode
*inode
,
1108 struct address_space
*mapping
,
1111 struct nfs_inode
*nfsi
= NFS_I(inode
);
1112 unsigned long *bitlock
= &nfsi
->flags
;
1115 /* swapfiles are not supposed to be shared. */
1116 if (IS_SWAPFILE(inode
))
1119 if (nfs_mapping_need_revalidate_inode(inode
)) {
1120 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1126 * We must clear NFS_INO_INVALID_DATA first to ensure that
1127 * invalidations that come in while we're shooting down the mappings
1128 * are respected. But, that leaves a race window where one revalidator
1129 * can clear the flag, and then another checks it before the mapping
1130 * gets invalidated. Fix that by serializing access to this part of
1133 * At the same time, we need to allow other tasks to see whether we
1134 * might be in the middle of invalidating the pages, so we only set
1135 * the bit lock here if it looks like we're going to be doing that.
1138 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1139 nfs_wait_bit_killable
, TASK_KILLABLE
);
1142 spin_lock(&inode
->i_lock
);
1143 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1144 spin_unlock(&inode
->i_lock
);
1147 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1149 spin_unlock(&inode
->i_lock
);
1153 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1155 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1156 spin_unlock(&inode
->i_lock
);
1157 trace_nfs_invalidate_mapping_enter(inode
);
1159 mutex_lock(&inode
->i_mutex
);
1160 ret
= nfs_invalidate_mapping(inode
, mapping
);
1161 mutex_unlock(&inode
->i_mutex
);
1163 ret
= nfs_invalidate_mapping(inode
, mapping
);
1164 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1166 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1167 smp_mb__after_atomic();
1168 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1174 * nfs_revalidate_mapping - Revalidate the pagecache
1175 * @inode - pointer to host inode
1176 * @mapping - pointer to mapping
1178 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1180 return __nfs_revalidate_mapping(inode
, mapping
, false);
1184 * nfs_revalidate_mapping_protected - Revalidate the pagecache
1185 * @inode - pointer to host inode
1186 * @mapping - pointer to mapping
1188 * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex
1189 * while invalidating the mapping.
1191 int nfs_revalidate_mapping_protected(struct inode
*inode
, struct address_space
*mapping
)
1193 return __nfs_revalidate_mapping(inode
, mapping
, true);
1196 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1198 struct nfs_inode
*nfsi
= NFS_I(inode
);
1199 unsigned long ret
= 0;
1201 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1202 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1203 && inode
->i_version
== fattr
->pre_change_attr
) {
1204 inode
->i_version
= fattr
->change_attr
;
1205 if (S_ISDIR(inode
->i_mode
))
1206 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1207 ret
|= NFS_INO_INVALID_ATTR
;
1209 /* If we have atomic WCC data, we may update some attributes */
1210 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1211 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1212 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1213 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1214 ret
|= NFS_INO_INVALID_ATTR
;
1217 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1218 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1219 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1220 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1221 if (S_ISDIR(inode
->i_mode
))
1222 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1223 ret
|= NFS_INO_INVALID_ATTR
;
1225 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1226 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1227 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1228 && nfsi
->nrequests
== 0) {
1229 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1230 ret
|= NFS_INO_INVALID_ATTR
;
1237 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1238 * @inode - pointer to inode
1239 * @fattr - updated attributes
1241 * Verifies the attribute cache. If we have just changed the attributes,
1242 * so that fattr carries weak cache consistency data, then it may
1243 * also update the ctime/mtime/change_attribute.
1245 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1247 struct nfs_inode
*nfsi
= NFS_I(inode
);
1248 loff_t cur_size
, new_isize
;
1249 unsigned long invalid
= 0;
1252 if (nfs_have_delegated_attributes(inode
))
1254 /* Has the inode gone and changed behind our back? */
1255 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1257 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1260 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1261 inode
->i_version
!= fattr
->change_attr
)
1262 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1264 /* Verify a few of the more important attributes */
1265 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1266 invalid
|= NFS_INO_INVALID_ATTR
;
1268 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1269 cur_size
= i_size_read(inode
);
1270 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1271 if (cur_size
!= new_isize
)
1272 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1274 if (nfsi
->nrequests
!= 0)
1275 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1277 /* Have any file permissions changed? */
1278 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1279 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1280 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1281 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1282 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1283 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1285 /* Has the link count changed? */
1286 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1287 invalid
|= NFS_INO_INVALID_ATTR
;
1289 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1290 invalid
|= NFS_INO_INVALID_ATIME
;
1293 nfs_set_cache_invalid(inode
, invalid
);
1295 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1299 static atomic_long_t nfs_attr_generation_counter
;
1301 static unsigned long nfs_read_attr_generation_counter(void)
1303 return atomic_long_read(&nfs_attr_generation_counter
);
1306 unsigned long nfs_inc_attr_generation_counter(void)
1308 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1310 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter
);
1312 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1315 fattr
->time_start
= jiffies
;
1316 fattr
->gencount
= nfs_inc_attr_generation_counter();
1317 fattr
->owner_name
= NULL
;
1318 fattr
->group_name
= NULL
;
1320 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1323 * nfs_fattr_set_barrier
1324 * @fattr: attributes
1326 * Used to set a barrier after an attribute was updated. This
1327 * barrier ensures that older attributes from RPC calls that may
1328 * have raced with our update cannot clobber these new values.
1329 * Note that you are still responsible for ensuring that other
1330 * operations which change the attribute on the server do not
1333 void nfs_fattr_set_barrier(struct nfs_fattr
*fattr
)
1335 fattr
->gencount
= nfs_inc_attr_generation_counter();
1338 struct nfs_fattr
*nfs_alloc_fattr(void)
1340 struct nfs_fattr
*fattr
;
1342 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1344 nfs_fattr_init(fattr
);
1347 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1349 struct nfs_fh
*nfs_alloc_fhandle(void)
1353 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1358 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1362 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1363 * in the same way that wireshark does
1367 * For debugging only.
1369 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1371 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1372 * not on the result */
1373 return nfs_fhandle_hash(fh
);
1375 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1378 * _nfs_display_fhandle - display an NFS file handle on the console
1380 * @fh: file handle to display
1381 * @caption: display caption
1383 * For debugging only.
1385 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1389 if (fh
== NULL
|| fh
->size
== 0) {
1390 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1394 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1395 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1396 for (i
= 0; i
< fh
->size
; i
+= 16) {
1397 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1399 switch ((fh
->size
- i
- 1) >> 2) {
1401 printk(KERN_DEFAULT
" %08x\n",
1405 printk(KERN_DEFAULT
" %08x %08x\n",
1406 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1409 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1410 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1411 be32_to_cpup(pos
+ 2));
1414 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1415 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1416 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1420 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1424 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1425 * @inode - pointer to inode
1426 * @fattr - attributes
1428 * Attempt to divine whether or not an RPC call reply carrying stale
1429 * attributes got scheduled after another call carrying updated ones.
1431 * To do so, the function first assumes that a more recent ctime means
1432 * that the attributes in fattr are newer, however it also attempt to
1433 * catch the case where ctime either didn't change, or went backwards
1434 * (if someone reset the clock on the server) by looking at whether
1435 * or not this RPC call was started after the inode was last updated.
1436 * Note also the check for wraparound of 'attr_gencount'
1438 * The function returns 'true' if it thinks the attributes in 'fattr' are
1439 * more recent than the ones cached in the inode.
1442 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1444 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1446 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1447 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1451 * Don't trust the change_attribute, mtime, ctime or size if
1452 * a pnfs LAYOUTCOMMIT is outstanding
1454 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1455 struct nfs_fattr
*fattr
)
1457 if (pnfs_layoutcommit_outstanding(inode
))
1458 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1459 NFS_ATTR_FATTR_MTIME
|
1460 NFS_ATTR_FATTR_CTIME
|
1461 NFS_ATTR_FATTR_SIZE
);
1464 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1468 trace_nfs_refresh_inode_enter(inode
);
1470 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1472 if (nfs_inode_attrs_need_update(inode
, fattr
))
1473 ret
= nfs_update_inode(inode
, fattr
);
1475 ret
= nfs_check_inode_attributes(inode
, fattr
);
1477 trace_nfs_refresh_inode_exit(inode
, ret
);
1482 * nfs_refresh_inode - try to update the inode attribute cache
1483 * @inode - pointer to inode
1484 * @fattr - updated attributes
1486 * Check that an RPC call that returned attributes has not overlapped with
1487 * other recent updates of the inode metadata, then decide whether it is
1488 * safe to do a full update of the inode attributes, or whether just to
1489 * call nfs_check_inode_attributes.
1491 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1495 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1497 spin_lock(&inode
->i_lock
);
1498 status
= nfs_refresh_inode_locked(inode
, fattr
);
1499 spin_unlock(&inode
->i_lock
);
1503 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1505 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1507 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1510 * Don't revalidate the pagecache if we hold a delegation, but do
1511 * force an attribute update
1513 if (NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
))
1514 invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_FORCED
;
1516 if (S_ISDIR(inode
->i_mode
))
1517 invalid
|= NFS_INO_INVALID_DATA
;
1518 nfs_set_cache_invalid(inode
, invalid
);
1519 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1521 return nfs_refresh_inode_locked(inode
, fattr
);
1525 * nfs_post_op_update_inode - try to update the inode attribute cache
1526 * @inode - pointer to inode
1527 * @fattr - updated attributes
1529 * After an operation that has changed the inode metadata, mark the
1530 * attribute cache as being invalid, then try to update it.
1532 * NB: if the server didn't return any post op attributes, this
1533 * function will force the retrieval of attributes before the next
1534 * NFS request. Thus it should be used only for operations that
1535 * are expected to change one or more attributes, to avoid
1536 * unnecessary NFS requests and trips through nfs_update_inode().
1538 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1542 spin_lock(&inode
->i_lock
);
1543 nfs_fattr_set_barrier(fattr
);
1544 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1545 spin_unlock(&inode
->i_lock
);
1549 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1552 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1553 * @inode - pointer to inode
1554 * @fattr - updated attributes
1556 * After an operation that has changed the inode metadata, mark the
1557 * attribute cache as being invalid, then try to update it. Fake up
1558 * weak cache consistency data, if none exist.
1560 * This function is mainly designed to be used by the ->write_done() functions.
1562 int nfs_post_op_update_inode_force_wcc_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1566 /* Don't do a WCC update if these attributes are already stale */
1567 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1568 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1569 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1570 | NFS_ATTR_FATTR_PRESIZE
1571 | NFS_ATTR_FATTR_PREMTIME
1572 | NFS_ATTR_FATTR_PRECTIME
);
1575 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1576 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1577 fattr
->pre_change_attr
= inode
->i_version
;
1578 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1580 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1581 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1582 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1583 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1585 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1586 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1587 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1588 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1590 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1591 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1592 fattr
->pre_size
= i_size_read(inode
);
1593 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1596 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1601 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1602 * @inode - pointer to inode
1603 * @fattr - updated attributes
1605 * After an operation that has changed the inode metadata, mark the
1606 * attribute cache as being invalid, then try to update it. Fake up
1607 * weak cache consistency data, if none exist.
1609 * This function is mainly designed to be used by the ->write_done() functions.
1611 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1615 spin_lock(&inode
->i_lock
);
1616 nfs_fattr_set_barrier(fattr
);
1617 status
= nfs_post_op_update_inode_force_wcc_locked(inode
, fattr
);
1618 spin_unlock(&inode
->i_lock
);
1621 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1624 static inline bool nfs_fileid_valid(struct nfs_inode
*nfsi
,
1625 struct nfs_fattr
*fattr
)
1627 bool ret1
= true, ret2
= true;
1629 if (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)
1630 ret1
= (nfsi
->fileid
== fattr
->fileid
);
1631 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
)
1632 ret2
= (nfsi
->fileid
== fattr
->mounted_on_fileid
);
1633 return ret1
|| ret2
;
1637 * Many nfs protocol calls return the new file attributes after
1638 * an operation. Here we update the inode to reflect the state
1639 * of the server's inode.
1641 * This is a bit tricky because we have to make sure all dirty pages
1642 * have been sent off to the server before calling invalidate_inode_pages.
1643 * To make sure no other process adds more write requests while we try
1644 * our best to flush them, we make them sleep during the attribute refresh.
1646 * A very similar scenario holds for the dir cache.
1648 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1650 struct nfs_server
*server
;
1651 struct nfs_inode
*nfsi
= NFS_I(inode
);
1652 loff_t cur_isize
, new_isize
;
1653 unsigned long invalid
= 0;
1654 unsigned long now
= jiffies
;
1655 unsigned long save_cache_validity
;
1656 bool cache_revalidated
= true;
1658 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1659 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1660 nfs_display_fhandle_hash(NFS_FH(inode
)),
1661 atomic_read(&inode
->i_count
), fattr
->valid
);
1663 if (!nfs_fileid_valid(nfsi
, fattr
)) {
1664 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1665 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1666 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1667 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1668 (long long)fattr
->fileid
);
1673 * Make sure the inode's type hasn't changed.
1675 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1677 * Big trouble! The inode has become a different object.
1679 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1680 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1684 server
= NFS_SERVER(inode
);
1685 /* Update the fsid? */
1686 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1687 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1688 !IS_AUTOMOUNT(inode
))
1689 server
->fsid
= fattr
->fsid
;
1692 * Update the read time so we don't revalidate too often.
1694 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1696 save_cache_validity
= nfsi
->cache_validity
;
1697 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1698 | NFS_INO_INVALID_ATIME
1699 | NFS_INO_REVAL_FORCED
1700 | NFS_INO_REVAL_PAGECACHE
);
1702 /* Do atomic weak cache consistency updates */
1703 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1705 /* More cache consistency checks */
1706 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1707 if (inode
->i_version
!= fattr
->change_attr
) {
1708 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1709 inode
->i_sb
->s_id
, inode
->i_ino
);
1710 invalid
|= NFS_INO_INVALID_ATTR
1711 | NFS_INO_INVALID_DATA
1712 | NFS_INO_INVALID_ACCESS
1713 | NFS_INO_INVALID_ACL
;
1714 if (S_ISDIR(inode
->i_mode
))
1715 nfs_force_lookup_revalidate(inode
);
1716 inode
->i_version
= fattr
->change_attr
;
1719 nfsi
->cache_validity
|= save_cache_validity
;
1720 cache_revalidated
= false;
1723 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1724 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1725 } else if (server
->caps
& NFS_CAP_MTIME
) {
1726 nfsi
->cache_validity
|= save_cache_validity
&
1727 (NFS_INO_INVALID_ATTR
1728 | NFS_INO_REVAL_FORCED
);
1729 cache_revalidated
= false;
1732 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1733 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1734 } else if (server
->caps
& NFS_CAP_CTIME
) {
1735 nfsi
->cache_validity
|= save_cache_validity
&
1736 (NFS_INO_INVALID_ATTR
1737 | NFS_INO_REVAL_FORCED
);
1738 cache_revalidated
= false;
1741 /* Check if our cached file size is stale */
1742 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1743 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1744 cur_isize
= i_size_read(inode
);
1745 if (new_isize
!= cur_isize
) {
1746 /* Do we perhaps have any outstanding writes, or has
1747 * the file grown beyond our last write? */
1748 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1749 i_size_write(inode
, new_isize
);
1750 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1752 dprintk("NFS: isize change on server for file %s/%ld "
1756 (long long)cur_isize
,
1757 (long long)new_isize
);
1760 nfsi
->cache_validity
|= save_cache_validity
&
1761 (NFS_INO_INVALID_ATTR
1762 | NFS_INO_REVAL_PAGECACHE
1763 | NFS_INO_REVAL_FORCED
);
1764 cache_revalidated
= false;
1768 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1769 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1770 else if (server
->caps
& NFS_CAP_ATIME
) {
1771 nfsi
->cache_validity
|= save_cache_validity
&
1772 (NFS_INO_INVALID_ATIME
1773 | NFS_INO_REVAL_FORCED
);
1774 cache_revalidated
= false;
1777 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1778 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1779 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1780 newmode
|= fattr
->mode
& S_IALLUGO
;
1781 inode
->i_mode
= newmode
;
1782 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1784 } else if (server
->caps
& NFS_CAP_MODE
) {
1785 nfsi
->cache_validity
|= save_cache_validity
&
1786 (NFS_INO_INVALID_ATTR
1787 | NFS_INO_INVALID_ACCESS
1788 | NFS_INO_INVALID_ACL
1789 | NFS_INO_REVAL_FORCED
);
1790 cache_revalidated
= false;
1793 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1794 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1795 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1796 inode
->i_uid
= fattr
->uid
;
1798 } else if (server
->caps
& NFS_CAP_OWNER
) {
1799 nfsi
->cache_validity
|= save_cache_validity
&
1800 (NFS_INO_INVALID_ATTR
1801 | NFS_INO_INVALID_ACCESS
1802 | NFS_INO_INVALID_ACL
1803 | NFS_INO_REVAL_FORCED
);
1804 cache_revalidated
= false;
1807 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1808 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1809 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1810 inode
->i_gid
= fattr
->gid
;
1812 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
) {
1813 nfsi
->cache_validity
|= save_cache_validity
&
1814 (NFS_INO_INVALID_ATTR
1815 | NFS_INO_INVALID_ACCESS
1816 | NFS_INO_INVALID_ACL
1817 | NFS_INO_REVAL_FORCED
);
1818 cache_revalidated
= false;
1821 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1822 if (inode
->i_nlink
!= fattr
->nlink
) {
1823 invalid
|= NFS_INO_INVALID_ATTR
;
1824 if (S_ISDIR(inode
->i_mode
))
1825 invalid
|= NFS_INO_INVALID_DATA
;
1826 set_nlink(inode
, fattr
->nlink
);
1828 } else if (server
->caps
& NFS_CAP_NLINK
) {
1829 nfsi
->cache_validity
|= save_cache_validity
&
1830 (NFS_INO_INVALID_ATTR
1831 | NFS_INO_REVAL_FORCED
);
1832 cache_revalidated
= false;
1835 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1837 * report the blocks in 512byte units
1839 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1840 } else if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1841 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1843 cache_revalidated
= false;
1845 /* Update attrtimeo value if we're out of the unstable period */
1846 if (invalid
& NFS_INO_INVALID_ATTR
) {
1847 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1848 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1849 nfsi
->attrtimeo_timestamp
= now
;
1850 /* Set barrier to be more recent than all outstanding updates */
1851 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1853 if (cache_revalidated
) {
1854 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
,
1855 nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1856 nfsi
->attrtimeo
<<= 1;
1857 if (nfsi
->attrtimeo
> NFS_MAXATTRTIMEO(inode
))
1858 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1860 nfsi
->attrtimeo_timestamp
= now
;
1862 /* Set the barrier to be more recent than this fattr */
1863 if ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
> 0)
1864 nfsi
->attr_gencount
= fattr
->gencount
;
1867 /* Don't declare attrcache up to date if there were no attrs! */
1868 if (cache_revalidated
)
1869 invalid
&= ~NFS_INO_INVALID_ATTR
;
1871 /* Don't invalidate the data if we were to blame */
1872 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1873 || S_ISLNK(inode
->i_mode
)))
1874 invalid
&= ~NFS_INO_INVALID_DATA
;
1875 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1876 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1877 nfs_set_cache_invalid(inode
, invalid
);
1882 * No need to worry about unhashing the dentry, as the
1883 * lookup validation will know that the inode is bad.
1884 * (But we fall through to invalidate the caches.)
1886 nfs_invalidate_inode(inode
);
1890 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1892 struct nfs_inode
*nfsi
;
1893 nfsi
= kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1897 nfsi
->cache_validity
= 0UL;
1898 #if IS_ENABLED(CONFIG_NFS_V4)
1899 nfsi
->nfs4_acl
= NULL
;
1900 #endif /* CONFIG_NFS_V4 */
1901 return &nfsi
->vfs_inode
;
1903 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1905 static void nfs_i_callback(struct rcu_head
*head
)
1907 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1908 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1911 void nfs_destroy_inode(struct inode
*inode
)
1913 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1915 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1917 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1919 #if IS_ENABLED(CONFIG_NFS_V4)
1920 INIT_LIST_HEAD(&nfsi
->open_states
);
1921 nfsi
->delegation
= NULL
;
1922 init_rwsem(&nfsi
->rwsem
);
1923 nfsi
->layout
= NULL
;
1927 static void init_once(void *foo
)
1929 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1931 inode_init_once(&nfsi
->vfs_inode
);
1932 INIT_LIST_HEAD(&nfsi
->open_files
);
1933 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1934 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1935 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1936 nfsi
->nrequests
= 0;
1937 nfsi
->commit_info
.ncommit
= 0;
1938 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1939 atomic_set(&nfsi
->silly_count
, 1);
1940 INIT_HLIST_HEAD(&nfsi
->silly_list
);
1941 init_waitqueue_head(&nfsi
->waitqueue
);
1942 nfs4_init_once(nfsi
);
1945 static int __init
nfs_init_inodecache(void)
1947 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1948 sizeof(struct nfs_inode
),
1949 0, (SLAB_RECLAIM_ACCOUNT
|
1952 if (nfs_inode_cachep
== NULL
)
1958 static void nfs_destroy_inodecache(void)
1961 * Make sure all delayed rcu free inodes are flushed before we
1965 kmem_cache_destroy(nfs_inode_cachep
);
1968 struct workqueue_struct
*nfsiod_workqueue
;
1969 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1972 * start up the nfsiod workqueue
1974 static int nfsiod_start(void)
1976 struct workqueue_struct
*wq
;
1977 dprintk("RPC: creating workqueue nfsiod\n");
1978 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1981 nfsiod_workqueue
= wq
;
1986 * Destroy the nfsiod workqueue
1988 static void nfsiod_stop(void)
1990 struct workqueue_struct
*wq
;
1992 wq
= nfsiod_workqueue
;
1995 nfsiod_workqueue
= NULL
;
1996 destroy_workqueue(wq
);
2000 EXPORT_SYMBOL_GPL(nfs_net_id
);
2002 static int nfs_net_init(struct net
*net
)
2004 nfs_clients_init(net
);
2005 return nfs_fs_proc_net_init(net
);
2008 static void nfs_net_exit(struct net
*net
)
2010 nfs_fs_proc_net_exit(net
);
2011 nfs_cleanup_cb_ident_idr(net
);
2014 static struct pernet_operations nfs_net_ops
= {
2015 .init
= nfs_net_init
,
2016 .exit
= nfs_net_exit
,
2018 .size
= sizeof(struct nfs_net
),
2024 static int __init
init_nfs_fs(void)
2028 err
= register_pernet_subsys(&nfs_net_ops
);
2032 err
= nfs_fscache_register();
2036 err
= nfsiod_start();
2040 err
= nfs_fs_proc_init();
2044 err
= nfs_init_nfspagecache();
2048 err
= nfs_init_inodecache();
2052 err
= nfs_init_readpagecache();
2056 err
= nfs_init_writepagecache();
2060 err
= nfs_init_directcache();
2064 rpc_proc_register(&init_net
, &nfs_rpcstat
);
2066 err
= register_nfs_fs();
2072 rpc_proc_unregister(&init_net
, "nfs");
2073 nfs_destroy_directcache();
2075 nfs_destroy_writepagecache();
2077 nfs_destroy_readpagecache();
2079 nfs_destroy_inodecache();
2081 nfs_destroy_nfspagecache();
2087 nfs_fscache_unregister();
2089 unregister_pernet_subsys(&nfs_net_ops
);
2094 static void __exit
exit_nfs_fs(void)
2096 nfs_destroy_directcache();
2097 nfs_destroy_writepagecache();
2098 nfs_destroy_readpagecache();
2099 nfs_destroy_inodecache();
2100 nfs_destroy_nfspagecache();
2101 nfs_fscache_unregister();
2102 unregister_pernet_subsys(&nfs_net_ops
);
2103 rpc_proc_unregister(&init_net
, "nfs");
2104 unregister_nfs_fs();
2109 /* Not quite true; I just maintain it */
2110 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2111 MODULE_LICENSE("GPL");
2112 module_param(enable_ino64
, bool, 0644);
2114 module_init(init_nfs_fs
)
2115 module_exit(exit_nfs_fs
)