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 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
;
419 inode_nohighmem(inode
);
421 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
423 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
424 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
425 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
426 inode
->i_version
= 0;
429 inode
->i_uid
= make_kuid(&init_user_ns
, -2);
430 inode
->i_gid
= make_kgid(&init_user_ns
, -2);
432 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
436 nfsi
->read_cache_jiffies
= fattr
->time_start
;
437 nfsi
->attr_gencount
= fattr
->gencount
;
438 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
439 inode
->i_atime
= fattr
->atime
;
440 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
441 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
442 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
443 inode
->i_mtime
= fattr
->mtime
;
444 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
445 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
446 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
447 inode
->i_ctime
= fattr
->ctime
;
448 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
449 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
450 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
451 inode
->i_version
= fattr
->change_attr
;
453 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
454 | NFS_INO_REVAL_PAGECACHE
);
455 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
456 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
458 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
459 | NFS_INO_REVAL_PAGECACHE
);
460 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
461 set_nlink(inode
, fattr
->nlink
);
462 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
463 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
464 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
465 inode
->i_uid
= fattr
->uid
;
466 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
467 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
468 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
469 inode
->i_gid
= fattr
->gid
;
470 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
471 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
472 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
473 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
474 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
476 * report the blocks in 512byte units
478 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
481 nfs_setsecurity(inode
, fattr
, label
);
483 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
484 nfsi
->attrtimeo_timestamp
= now
;
485 nfsi
->access_cache
= RB_ROOT
;
487 nfs_fscache_init_inode(inode
);
489 unlock_new_inode(inode
);
491 nfs_refresh_inode(inode
, fattr
);
492 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
494 (unsigned long long)NFS_FILEID(inode
),
495 nfs_display_fhandle_hash(fh
),
496 atomic_read(&inode
->i_count
));
502 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
505 EXPORT_SYMBOL_GPL(nfs_fhget
);
507 #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)
510 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
512 struct inode
*inode
= d_inode(dentry
);
513 struct nfs_fattr
*fattr
;
516 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
518 /* skip mode change if it's just for clearing setuid/setgid */
519 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
520 attr
->ia_valid
&= ~ATTR_MODE
;
522 if (attr
->ia_valid
& ATTR_SIZE
) {
523 BUG_ON(!S_ISREG(inode
->i_mode
));
525 error
= inode_newsize_ok(inode
, attr
->ia_size
);
529 if (attr
->ia_size
== i_size_read(inode
))
530 attr
->ia_valid
&= ~ATTR_SIZE
;
533 /* Optimization: if the end result is no change, don't RPC */
534 attr
->ia_valid
&= NFS_VALID_ATTRS
;
535 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
538 trace_nfs_setattr_enter(inode
);
540 /* Write all dirty data */
541 if (S_ISREG(inode
->i_mode
))
542 nfs_sync_inode(inode
);
544 fattr
= nfs_alloc_fattr();
551 * Return any delegations if we're going to change ACLs
553 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
554 NFS_PROTO(inode
)->return_delegation(inode
);
555 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
557 error
= nfs_refresh_inode(inode
, fattr
);
558 nfs_free_fattr(fattr
);
560 trace_nfs_setattr_exit(inode
, error
);
563 EXPORT_SYMBOL_GPL(nfs_setattr
);
566 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
567 * @inode: inode of the file used
568 * @offset: file offset to start truncating
570 * This is a copy of the common vmtruncate, but with the locking
571 * corrected to take into account the fact that NFS requires
572 * inode->i_size to be updated under the inode->i_lock.
573 * Note: must be called with inode->i_lock held!
575 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
579 err
= inode_newsize_ok(inode
, offset
);
583 i_size_write(inode
, offset
);
586 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
588 spin_unlock(&inode
->i_lock
);
589 truncate_pagecache(inode
, offset
);
590 spin_lock(&inode
->i_lock
);
596 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
597 * @inode: pointer to struct inode
598 * @attr: pointer to struct iattr
600 * Note: we do this in the *proc.c in order to ensure that
601 * it works for things like exclusive creates too.
603 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
,
604 struct nfs_fattr
*fattr
)
606 /* Barrier: bump the attribute generation count. */
607 nfs_fattr_set_barrier(fattr
);
609 spin_lock(&inode
->i_lock
);
610 NFS_I(inode
)->attr_gencount
= fattr
->gencount
;
611 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
612 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
613 int mode
= attr
->ia_mode
& S_IALLUGO
;
614 mode
|= inode
->i_mode
& ~S_IALLUGO
;
615 inode
->i_mode
= mode
;
617 if ((attr
->ia_valid
& ATTR_UID
) != 0)
618 inode
->i_uid
= attr
->ia_uid
;
619 if ((attr
->ia_valid
& ATTR_GID
) != 0)
620 inode
->i_gid
= attr
->ia_gid
;
621 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
622 | NFS_INO_INVALID_ACL
);
624 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
625 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
626 nfs_vmtruncate(inode
, attr
->ia_size
);
629 nfs_update_inode(inode
, fattr
);
631 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATTR
;
632 spin_unlock(&inode
->i_lock
);
634 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
636 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
638 struct dentry
*parent
;
640 parent
= dget_parent(dentry
);
641 nfs_force_use_readdirplus(d_inode(parent
));
645 static bool nfs_need_revalidate_inode(struct inode
*inode
)
647 if (NFS_I(inode
)->cache_validity
&
648 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
650 if (nfs_attribute_cache_expired(inode
))
655 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
657 struct inode
*inode
= d_inode(dentry
);
658 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
661 trace_nfs_getattr_enter(inode
);
662 /* Flush out writes to the server in order to update c/mtime. */
663 if (S_ISREG(inode
->i_mode
)) {
664 err
= filemap_write_and_wait(inode
->i_mapping
);
670 * We may force a getattr if the user cares about atime.
672 * Note that we only have to check the vfsmount flags here:
673 * - NFS always sets S_NOATIME by so checking it would give a
675 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
676 * no point in checking those.
678 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
679 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
682 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
683 struct nfs_server
*server
= NFS_SERVER(inode
);
685 if (server
->caps
& NFS_CAP_READDIRPLUS
)
686 nfs_request_parent_use_readdirplus(dentry
);
687 err
= __nfs_revalidate_inode(server
, inode
);
690 generic_fillattr(inode
, stat
);
691 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
692 if (S_ISDIR(inode
->i_mode
))
693 stat
->blksize
= NFS_SERVER(inode
)->dtsize
;
696 trace_nfs_getattr_exit(inode
, err
);
699 EXPORT_SYMBOL_GPL(nfs_getattr
);
701 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
703 atomic_set(&l_ctx
->count
, 1);
704 l_ctx
->lockowner
.l_owner
= current
->files
;
705 l_ctx
->lockowner
.l_pid
= current
->tgid
;
706 INIT_LIST_HEAD(&l_ctx
->list
);
707 atomic_set(&l_ctx
->io_count
, 0);
710 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
712 struct nfs_lock_context
*head
= &ctx
->lock_context
;
713 struct nfs_lock_context
*pos
= head
;
716 if (pos
->lockowner
.l_owner
!= current
->files
)
718 if (pos
->lockowner
.l_pid
!= current
->tgid
)
720 atomic_inc(&pos
->count
);
722 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
726 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
728 struct nfs_lock_context
*res
, *new = NULL
;
729 struct inode
*inode
= d_inode(ctx
->dentry
);
731 spin_lock(&inode
->i_lock
);
732 res
= __nfs_find_lock_context(ctx
);
734 spin_unlock(&inode
->i_lock
);
735 new = kmalloc(sizeof(*new), GFP_KERNEL
);
737 return ERR_PTR(-ENOMEM
);
738 nfs_init_lock_context(new);
739 spin_lock(&inode
->i_lock
);
740 res
= __nfs_find_lock_context(ctx
);
742 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
743 new->open_context
= ctx
;
748 spin_unlock(&inode
->i_lock
);
752 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
754 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
756 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
757 struct inode
*inode
= d_inode(ctx
->dentry
);
759 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
761 list_del(&l_ctx
->list
);
762 spin_unlock(&inode
->i_lock
);
765 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
768 * nfs_close_context - Common close_context() routine NFSv2/v3
769 * @ctx: pointer to context
770 * @is_sync: is this a synchronous close
772 * Ensure that the attributes are up to date if we're mounted
773 * with close-to-open semantics and we have cached data that will
774 * need to be revalidated on open.
776 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
778 struct nfs_inode
*nfsi
;
780 struct nfs_server
*server
;
782 if (!(ctx
->mode
& FMODE_WRITE
))
786 inode
= d_inode(ctx
->dentry
);
788 if (inode
->i_mapping
->nrpages
== 0)
790 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
792 if (!list_empty(&nfsi
->open_files
))
794 server
= NFS_SERVER(inode
);
795 if (server
->flags
& NFS_MOUNT_NOCTO
)
797 nfs_revalidate_inode(server
, inode
);
799 EXPORT_SYMBOL_GPL(nfs_close_context
);
801 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
803 struct nfs_open_context
*ctx
;
804 struct rpc_cred
*cred
= rpc_lookup_cred();
806 return ERR_CAST(cred
);
808 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
811 return ERR_PTR(-ENOMEM
);
813 nfs_sb_active(dentry
->d_sb
);
814 ctx
->dentry
= dget(dentry
);
820 nfs_init_lock_context(&ctx
->lock_context
);
821 ctx
->lock_context
.open_context
= ctx
;
822 INIT_LIST_HEAD(&ctx
->list
);
823 ctx
->mdsthreshold
= NULL
;
826 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
828 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
831 atomic_inc(&ctx
->lock_context
.count
);
834 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
836 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
838 struct inode
*inode
= d_inode(ctx
->dentry
);
839 struct super_block
*sb
= ctx
->dentry
->d_sb
;
841 if (!list_empty(&ctx
->list
)) {
842 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
844 list_del(&ctx
->list
);
845 spin_unlock(&inode
->i_lock
);
846 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
849 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
850 if (ctx
->cred
!= NULL
)
851 put_rpccred(ctx
->cred
);
854 kfree(ctx
->mdsthreshold
);
858 void put_nfs_open_context(struct nfs_open_context
*ctx
)
860 __put_nfs_open_context(ctx
, 0);
862 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
864 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
866 __put_nfs_open_context(ctx
, 1);
870 * Ensure that mmap has a recent RPC credential for use when writing out
873 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
875 struct inode
*inode
= d_inode(ctx
->dentry
);
876 struct nfs_inode
*nfsi
= NFS_I(inode
);
878 spin_lock(&inode
->i_lock
);
879 if (ctx
->mode
& FMODE_WRITE
)
880 list_add(&ctx
->list
, &nfsi
->open_files
);
882 list_add_tail(&ctx
->list
, &nfsi
->open_files
);
883 spin_unlock(&inode
->i_lock
);
885 EXPORT_SYMBOL_GPL(nfs_inode_attach_open_context
);
887 void nfs_file_set_open_context(struct file
*filp
, struct nfs_open_context
*ctx
)
889 filp
->private_data
= get_nfs_open_context(ctx
);
890 if (list_empty(&ctx
->list
))
891 nfs_inode_attach_open_context(ctx
);
893 EXPORT_SYMBOL_GPL(nfs_file_set_open_context
);
896 * Given an inode, search for an open context with the desired characteristics
898 struct nfs_open_context
*nfs_find_open_context(struct inode
*inode
, struct rpc_cred
*cred
, fmode_t mode
)
900 struct nfs_inode
*nfsi
= NFS_I(inode
);
901 struct nfs_open_context
*pos
, *ctx
= NULL
;
903 spin_lock(&inode
->i_lock
);
904 list_for_each_entry(pos
, &nfsi
->open_files
, list
) {
905 if (cred
!= NULL
&& pos
->cred
!= cred
)
907 if ((pos
->mode
& (FMODE_READ
|FMODE_WRITE
)) != mode
)
909 ctx
= get_nfs_open_context(pos
);
912 spin_unlock(&inode
->i_lock
);
916 void nfs_file_clear_open_context(struct file
*filp
)
918 struct nfs_open_context
*ctx
= nfs_file_open_context(filp
);
921 struct inode
*inode
= d_inode(ctx
->dentry
);
924 * We fatal error on write before. Try to writeback
928 invalidate_inode_pages2(inode
->i_mapping
);
929 filp
->private_data
= NULL
;
930 spin_lock(&inode
->i_lock
);
931 list_move_tail(&ctx
->list
, &NFS_I(inode
)->open_files
);
932 spin_unlock(&inode
->i_lock
);
933 put_nfs_open_context_sync(ctx
);
938 * These allocate and release file read/write context information.
940 int nfs_open(struct inode
*inode
, struct file
*filp
)
942 struct nfs_open_context
*ctx
;
944 ctx
= alloc_nfs_open_context(file_dentry(filp
), filp
->f_mode
);
947 nfs_file_set_open_context(filp
, ctx
);
948 put_nfs_open_context(ctx
);
949 nfs_fscache_open_file(inode
, filp
);
954 * This function is called whenever some part of NFS notices that
955 * the cached attributes have to be refreshed.
958 __nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
960 int status
= -ESTALE
;
961 struct nfs4_label
*label
= NULL
;
962 struct nfs_fattr
*fattr
= NULL
;
963 struct nfs_inode
*nfsi
= NFS_I(inode
);
965 dfprintk(PAGECACHE
, "NFS: revalidating (%s/%Lu)\n",
966 inode
->i_sb
->s_id
, (unsigned long long)NFS_FILEID(inode
));
968 trace_nfs_revalidate_inode_enter(inode
);
970 if (is_bad_inode(inode
))
972 if (NFS_STALE(inode
))
975 /* pNFS: Attributes aren't updated until we layoutcommit */
976 if (S_ISREG(inode
->i_mode
)) {
977 status
= pnfs_sync_inode(inode
, false);
983 fattr
= nfs_alloc_fattr();
987 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
989 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
991 status
= PTR_ERR(label
);
995 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
997 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
999 (unsigned long long)NFS_FILEID(inode
), status
);
1000 if (status
== -ESTALE
) {
1001 nfs_zap_caches(inode
);
1002 if (!S_ISDIR(inode
->i_mode
))
1003 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
1008 status
= nfs_refresh_inode(inode
, fattr
);
1010 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1012 (unsigned long long)NFS_FILEID(inode
), status
);
1016 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
1017 nfs_zap_acl_cache(inode
);
1019 nfs_setsecurity(inode
, fattr
, label
);
1021 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
1023 (unsigned long long)NFS_FILEID(inode
));
1026 nfs4_label_free(label
);
1028 nfs_free_fattr(fattr
);
1029 trace_nfs_revalidate_inode_exit(inode
, status
);
1033 int nfs_attribute_timeout(struct inode
*inode
)
1035 struct nfs_inode
*nfsi
= NFS_I(inode
);
1037 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
1040 int nfs_attribute_cache_expired(struct inode
*inode
)
1042 if (nfs_have_delegated_attributes(inode
))
1044 return nfs_attribute_timeout(inode
);
1048 * nfs_revalidate_inode - Revalidate the inode attributes
1049 * @server - pointer to nfs_server struct
1050 * @inode - pointer to inode struct
1052 * Updates inode attribute information by retrieving the data from the server.
1054 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1056 if (!nfs_need_revalidate_inode(inode
))
1057 return NFS_STALE(inode
) ? -ESTALE
: 0;
1058 return __nfs_revalidate_inode(server
, inode
);
1060 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1062 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1064 if (!(NFS_I(inode
)->cache_validity
&
1065 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1066 && !nfs_attribute_cache_expired(inode
))
1067 return NFS_STALE(inode
) ? -ESTALE
: 0;
1071 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1073 struct nfs_inode
*nfsi
= NFS_I(inode
);
1076 if (mapping
->nrpages
!= 0) {
1077 if (S_ISREG(inode
->i_mode
)) {
1078 unmap_mapping_range(mapping
, 0, 0, 0);
1079 ret
= nfs_sync_mapping(mapping
);
1083 ret
= invalidate_inode_pages2(mapping
);
1087 if (S_ISDIR(inode
->i_mode
)) {
1088 spin_lock(&inode
->i_lock
);
1089 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1090 spin_unlock(&inode
->i_lock
);
1092 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1093 nfs_fscache_wait_on_invalidate(inode
);
1095 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1097 (unsigned long long)NFS_FILEID(inode
));
1101 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1103 if (nfs_have_delegated_attributes(inode
))
1105 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1106 || nfs_attribute_timeout(inode
)
1107 || NFS_STALE(inode
);
1110 int nfs_revalidate_mapping_rcu(struct inode
*inode
)
1112 struct nfs_inode
*nfsi
= NFS_I(inode
);
1113 unsigned long *bitlock
= &nfsi
->flags
;
1116 if (IS_SWAPFILE(inode
))
1118 if (nfs_mapping_need_revalidate_inode(inode
)) {
1122 spin_lock(&inode
->i_lock
);
1123 if (test_bit(NFS_INO_INVALIDATING
, bitlock
) ||
1124 (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
))
1126 spin_unlock(&inode
->i_lock
);
1132 * nfs_revalidate_mapping - Revalidate the pagecache
1133 * @inode - pointer to host inode
1134 * @mapping - pointer to mapping
1136 int nfs_revalidate_mapping(struct inode
*inode
,
1137 struct address_space
*mapping
)
1139 struct nfs_inode
*nfsi
= NFS_I(inode
);
1140 unsigned long *bitlock
= &nfsi
->flags
;
1143 /* swapfiles are not supposed to be shared. */
1144 if (IS_SWAPFILE(inode
))
1147 if (nfs_mapping_need_revalidate_inode(inode
)) {
1148 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1154 * We must clear NFS_INO_INVALID_DATA first to ensure that
1155 * invalidations that come in while we're shooting down the mappings
1156 * are respected. But, that leaves a race window where one revalidator
1157 * can clear the flag, and then another checks it before the mapping
1158 * gets invalidated. Fix that by serializing access to this part of
1161 * At the same time, we need to allow other tasks to see whether we
1162 * might be in the middle of invalidating the pages, so we only set
1163 * the bit lock here if it looks like we're going to be doing that.
1166 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1167 nfs_wait_bit_killable
, TASK_KILLABLE
);
1170 spin_lock(&inode
->i_lock
);
1171 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1172 spin_unlock(&inode
->i_lock
);
1175 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1177 spin_unlock(&inode
->i_lock
);
1181 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1183 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1184 spin_unlock(&inode
->i_lock
);
1185 trace_nfs_invalidate_mapping_enter(inode
);
1186 ret
= nfs_invalidate_mapping(inode
, mapping
);
1187 trace_nfs_invalidate_mapping_exit(inode
, ret
);
1189 clear_bit_unlock(NFS_INO_INVALIDATING
, bitlock
);
1190 smp_mb__after_atomic();
1191 wake_up_bit(bitlock
, NFS_INO_INVALIDATING
);
1196 static bool nfs_file_has_writers(struct nfs_inode
*nfsi
)
1198 struct inode
*inode
= &nfsi
->vfs_inode
;
1200 assert_spin_locked(&inode
->i_lock
);
1202 if (!S_ISREG(inode
->i_mode
))
1204 if (list_empty(&nfsi
->open_files
))
1206 /* Note: This relies on nfsi->open_files being ordered with writers
1207 * being placed at the head of the list.
1208 * See nfs_inode_attach_open_context()
1210 return (list_first_entry(&nfsi
->open_files
,
1211 struct nfs_open_context
,
1212 list
)->mode
& FMODE_WRITE
) == FMODE_WRITE
;
1215 static bool nfs_file_has_buffered_writers(struct nfs_inode
*nfsi
)
1217 return nfs_file_has_writers(nfsi
) && nfs_file_io_is_buffered(nfsi
);
1220 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1222 struct nfs_inode
*nfsi
= NFS_I(inode
);
1223 unsigned long ret
= 0;
1225 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1226 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1227 && inode
->i_version
== fattr
->pre_change_attr
) {
1228 inode
->i_version
= fattr
->change_attr
;
1229 if (S_ISDIR(inode
->i_mode
))
1230 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1231 ret
|= NFS_INO_INVALID_ATTR
;
1233 /* If we have atomic WCC data, we may update some attributes */
1234 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1235 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1236 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1237 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1238 ret
|= NFS_INO_INVALID_ATTR
;
1241 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1242 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1243 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1244 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1245 if (S_ISDIR(inode
->i_mode
))
1246 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1247 ret
|= NFS_INO_INVALID_ATTR
;
1249 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1250 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1251 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1252 && nfsi
->nrequests
== 0) {
1253 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1254 ret
|= NFS_INO_INVALID_ATTR
;
1261 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1262 * @inode - pointer to inode
1263 * @fattr - updated attributes
1265 * Verifies the attribute cache. If we have just changed the attributes,
1266 * so that fattr carries weak cache consistency data, then it may
1267 * also update the ctime/mtime/change_attribute.
1269 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1271 struct nfs_inode
*nfsi
= NFS_I(inode
);
1272 loff_t cur_size
, new_isize
;
1273 unsigned long invalid
= 0;
1276 if (nfs_have_delegated_attributes(inode
))
1278 /* Has the inode gone and changed behind our back? */
1279 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1281 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1284 if (!nfs_file_has_buffered_writers(nfsi
)) {
1285 /* Verify a few of the more important attributes */
1286 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 && inode
->i_version
!= fattr
->change_attr
)
1287 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_REVAL_PAGECACHE
;
1289 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1290 invalid
|= NFS_INO_INVALID_ATTR
;
1292 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) && !timespec_equal(&inode
->i_ctime
, &fattr
->ctime
))
1293 invalid
|= NFS_INO_INVALID_ATTR
;
1295 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1296 cur_size
= i_size_read(inode
);
1297 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1298 if (cur_size
!= new_isize
)
1299 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1303 /* Have any file permissions changed? */
1304 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1305 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1306 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1307 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1308 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1309 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1311 /* Has the link count changed? */
1312 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1313 invalid
|= NFS_INO_INVALID_ATTR
;
1315 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1316 invalid
|= NFS_INO_INVALID_ATIME
;
1319 nfs_set_cache_invalid(inode
, invalid
);
1321 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1325 static atomic_long_t nfs_attr_generation_counter
;
1327 static unsigned long nfs_read_attr_generation_counter(void)
1329 return atomic_long_read(&nfs_attr_generation_counter
);
1332 unsigned long nfs_inc_attr_generation_counter(void)
1334 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1336 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter
);
1338 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1341 fattr
->time_start
= jiffies
;
1342 fattr
->gencount
= nfs_inc_attr_generation_counter();
1343 fattr
->owner_name
= NULL
;
1344 fattr
->group_name
= NULL
;
1346 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1349 * nfs_fattr_set_barrier
1350 * @fattr: attributes
1352 * Used to set a barrier after an attribute was updated. This
1353 * barrier ensures that older attributes from RPC calls that may
1354 * have raced with our update cannot clobber these new values.
1355 * Note that you are still responsible for ensuring that other
1356 * operations which change the attribute on the server do not
1359 void nfs_fattr_set_barrier(struct nfs_fattr
*fattr
)
1361 fattr
->gencount
= nfs_inc_attr_generation_counter();
1364 struct nfs_fattr
*nfs_alloc_fattr(void)
1366 struct nfs_fattr
*fattr
;
1368 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1370 nfs_fattr_init(fattr
);
1373 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1375 struct nfs_fh
*nfs_alloc_fhandle(void)
1379 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1384 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1388 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1389 * in the same way that wireshark does
1393 * For debugging only.
1395 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1397 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1398 * not on the result */
1399 return nfs_fhandle_hash(fh
);
1401 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1404 * _nfs_display_fhandle - display an NFS file handle on the console
1406 * @fh: file handle to display
1407 * @caption: display caption
1409 * For debugging only.
1411 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1415 if (fh
== NULL
|| fh
->size
== 0) {
1416 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1420 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1421 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1422 for (i
= 0; i
< fh
->size
; i
+= 16) {
1423 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1425 switch ((fh
->size
- i
- 1) >> 2) {
1427 printk(KERN_DEFAULT
" %08x\n",
1431 printk(KERN_DEFAULT
" %08x %08x\n",
1432 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1435 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1436 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1437 be32_to_cpup(pos
+ 2));
1440 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1441 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1442 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1446 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1450 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1451 * @inode - pointer to inode
1452 * @fattr - attributes
1454 * Attempt to divine whether or not an RPC call reply carrying stale
1455 * attributes got scheduled after another call carrying updated ones.
1457 * To do so, the function first assumes that a more recent ctime means
1458 * that the attributes in fattr are newer, however it also attempt to
1459 * catch the case where ctime either didn't change, or went backwards
1460 * (if someone reset the clock on the server) by looking at whether
1461 * or not this RPC call was started after the inode was last updated.
1462 * Note also the check for wraparound of 'attr_gencount'
1464 * The function returns 'true' if it thinks the attributes in 'fattr' are
1465 * more recent than the ones cached in the inode.
1468 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1470 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1472 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1473 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1476 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1480 trace_nfs_refresh_inode_enter(inode
);
1482 if (nfs_inode_attrs_need_update(inode
, fattr
))
1483 ret
= nfs_update_inode(inode
, fattr
);
1485 ret
= nfs_check_inode_attributes(inode
, fattr
);
1487 trace_nfs_refresh_inode_exit(inode
, ret
);
1492 * nfs_refresh_inode - try to update the inode attribute cache
1493 * @inode - pointer to inode
1494 * @fattr - updated attributes
1496 * Check that an RPC call that returned attributes has not overlapped with
1497 * other recent updates of the inode metadata, then decide whether it is
1498 * safe to do a full update of the inode attributes, or whether just to
1499 * call nfs_check_inode_attributes.
1501 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1505 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1507 spin_lock(&inode
->i_lock
);
1508 status
= nfs_refresh_inode_locked(inode
, fattr
);
1509 spin_unlock(&inode
->i_lock
);
1513 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1515 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1517 unsigned long invalid
= NFS_INO_INVALID_ATTR
;
1520 * Don't revalidate the pagecache if we hold a delegation, but do
1521 * force an attribute update
1523 if (NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
))
1524 invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_FORCED
;
1526 if (S_ISDIR(inode
->i_mode
))
1527 invalid
|= NFS_INO_INVALID_DATA
;
1528 nfs_set_cache_invalid(inode
, invalid
);
1529 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1531 return nfs_refresh_inode_locked(inode
, fattr
);
1535 * nfs_post_op_update_inode - try to update the inode attribute cache
1536 * @inode - pointer to inode
1537 * @fattr - updated attributes
1539 * After an operation that has changed the inode metadata, mark the
1540 * attribute cache as being invalid, then try to update it.
1542 * NB: if the server didn't return any post op attributes, this
1543 * function will force the retrieval of attributes before the next
1544 * NFS request. Thus it should be used only for operations that
1545 * are expected to change one or more attributes, to avoid
1546 * unnecessary NFS requests and trips through nfs_update_inode().
1548 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1552 spin_lock(&inode
->i_lock
);
1553 nfs_fattr_set_barrier(fattr
);
1554 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1555 spin_unlock(&inode
->i_lock
);
1559 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1562 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1563 * @inode - pointer to inode
1564 * @fattr - updated attributes
1566 * After an operation that has changed the inode metadata, mark the
1567 * attribute cache as being invalid, then try to update it. Fake up
1568 * weak cache consistency data, if none exist.
1570 * This function is mainly designed to be used by the ->write_done() functions.
1572 int nfs_post_op_update_inode_force_wcc_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1576 /* Don't do a WCC update if these attributes are already stale */
1577 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1578 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1579 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1580 | NFS_ATTR_FATTR_PRESIZE
1581 | NFS_ATTR_FATTR_PREMTIME
1582 | NFS_ATTR_FATTR_PRECTIME
);
1585 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1586 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1587 fattr
->pre_change_attr
= inode
->i_version
;
1588 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1590 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1591 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1592 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1593 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1595 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1596 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1597 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1598 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1600 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1601 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1602 fattr
->pre_size
= i_size_read(inode
);
1603 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1606 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1611 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1612 * @inode - pointer to inode
1613 * @fattr - updated attributes
1615 * After an operation that has changed the inode metadata, mark the
1616 * attribute cache as being invalid, then try to update it. Fake up
1617 * weak cache consistency data, if none exist.
1619 * This function is mainly designed to be used by the ->write_done() functions.
1621 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1625 spin_lock(&inode
->i_lock
);
1626 nfs_fattr_set_barrier(fattr
);
1627 status
= nfs_post_op_update_inode_force_wcc_locked(inode
, fattr
);
1628 spin_unlock(&inode
->i_lock
);
1631 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1634 static inline bool nfs_fileid_valid(struct nfs_inode
*nfsi
,
1635 struct nfs_fattr
*fattr
)
1637 bool ret1
= true, ret2
= true;
1639 if (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)
1640 ret1
= (nfsi
->fileid
== fattr
->fileid
);
1641 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
)
1642 ret2
= (nfsi
->fileid
== fattr
->mounted_on_fileid
);
1643 return ret1
|| ret2
;
1647 * Many nfs protocol calls return the new file attributes after
1648 * an operation. Here we update the inode to reflect the state
1649 * of the server's inode.
1651 * This is a bit tricky because we have to make sure all dirty pages
1652 * have been sent off to the server before calling invalidate_inode_pages.
1653 * To make sure no other process adds more write requests while we try
1654 * our best to flush them, we make them sleep during the attribute refresh.
1656 * A very similar scenario holds for the dir cache.
1658 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1660 struct nfs_server
*server
;
1661 struct nfs_inode
*nfsi
= NFS_I(inode
);
1662 loff_t cur_isize
, new_isize
;
1663 unsigned long invalid
= 0;
1664 unsigned long now
= jiffies
;
1665 unsigned long save_cache_validity
;
1666 bool have_writers
= nfs_file_has_buffered_writers(nfsi
);
1667 bool cache_revalidated
;
1669 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1670 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1671 nfs_display_fhandle_hash(NFS_FH(inode
)),
1672 atomic_read(&inode
->i_count
), fattr
->valid
);
1674 if (!nfs_fileid_valid(nfsi
, fattr
)) {
1675 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1676 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1677 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1678 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1679 (long long)fattr
->fileid
);
1684 * Make sure the inode's type hasn't changed.
1686 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1688 * Big trouble! The inode has become a different object.
1690 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1691 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1695 server
= NFS_SERVER(inode
);
1696 /* Update the fsid? */
1697 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1698 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1699 !IS_AUTOMOUNT(inode
))
1700 server
->fsid
= fattr
->fsid
;
1703 * Update the read time so we don't revalidate too often.
1705 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1707 save_cache_validity
= nfsi
->cache_validity
;
1708 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1709 | NFS_INO_INVALID_ATIME
1710 | NFS_INO_REVAL_FORCED
1711 | NFS_INO_REVAL_PAGECACHE
);
1713 /* Do atomic weak cache consistency updates */
1714 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1717 cache_revalidated
= !pnfs_layoutcommit_outstanding(inode
);
1719 /* More cache consistency checks */
1720 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1721 if (inode
->i_version
!= fattr
->change_attr
) {
1722 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1723 inode
->i_sb
->s_id
, inode
->i_ino
);
1724 /* Could it be a race with writeback? */
1725 if (!have_writers
) {
1726 invalid
|= NFS_INO_INVALID_ATTR
1727 | NFS_INO_INVALID_DATA
1728 | NFS_INO_INVALID_ACCESS
1729 | NFS_INO_INVALID_ACL
;
1730 if (S_ISDIR(inode
->i_mode
))
1731 nfs_force_lookup_revalidate(inode
);
1733 inode
->i_version
= fattr
->change_attr
;
1736 nfsi
->cache_validity
|= save_cache_validity
;
1737 cache_revalidated
= false;
1740 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1741 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1742 } else if (server
->caps
& NFS_CAP_MTIME
) {
1743 nfsi
->cache_validity
|= save_cache_validity
&
1744 (NFS_INO_INVALID_ATTR
1745 | NFS_INO_REVAL_FORCED
);
1746 cache_revalidated
= false;
1749 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1750 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1751 } else if (server
->caps
& NFS_CAP_CTIME
) {
1752 nfsi
->cache_validity
|= save_cache_validity
&
1753 (NFS_INO_INVALID_ATTR
1754 | NFS_INO_REVAL_FORCED
);
1755 cache_revalidated
= false;
1758 /* Check if our cached file size is stale */
1759 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1760 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1761 cur_isize
= i_size_read(inode
);
1762 if (new_isize
!= cur_isize
) {
1763 /* Do we perhaps have any outstanding writes, or has
1764 * the file grown beyond our last write? */
1765 if (nfsi
->nrequests
== 0 || new_isize
> cur_isize
) {
1766 i_size_write(inode
, new_isize
);
1768 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1770 dprintk("NFS: isize change on server for file %s/%ld "
1774 (long long)cur_isize
,
1775 (long long)new_isize
);
1778 nfsi
->cache_validity
|= save_cache_validity
&
1779 (NFS_INO_INVALID_ATTR
1780 | NFS_INO_REVAL_PAGECACHE
1781 | NFS_INO_REVAL_FORCED
);
1782 cache_revalidated
= false;
1786 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1787 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1788 else if (server
->caps
& NFS_CAP_ATIME
) {
1789 nfsi
->cache_validity
|= save_cache_validity
&
1790 (NFS_INO_INVALID_ATIME
1791 | NFS_INO_REVAL_FORCED
);
1792 cache_revalidated
= false;
1795 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1796 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1797 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1798 newmode
|= fattr
->mode
& S_IALLUGO
;
1799 inode
->i_mode
= newmode
;
1800 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1802 } else if (server
->caps
& NFS_CAP_MODE
) {
1803 nfsi
->cache_validity
|= save_cache_validity
&
1804 (NFS_INO_INVALID_ATTR
1805 | NFS_INO_INVALID_ACCESS
1806 | NFS_INO_INVALID_ACL
1807 | NFS_INO_REVAL_FORCED
);
1808 cache_revalidated
= false;
1811 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1812 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1813 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1814 inode
->i_uid
= fattr
->uid
;
1816 } else if (server
->caps
& NFS_CAP_OWNER
) {
1817 nfsi
->cache_validity
|= save_cache_validity
&
1818 (NFS_INO_INVALID_ATTR
1819 | NFS_INO_INVALID_ACCESS
1820 | NFS_INO_INVALID_ACL
1821 | NFS_INO_REVAL_FORCED
);
1822 cache_revalidated
= false;
1825 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1826 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1827 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1828 inode
->i_gid
= fattr
->gid
;
1830 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
) {
1831 nfsi
->cache_validity
|= save_cache_validity
&
1832 (NFS_INO_INVALID_ATTR
1833 | NFS_INO_INVALID_ACCESS
1834 | NFS_INO_INVALID_ACL
1835 | NFS_INO_REVAL_FORCED
);
1836 cache_revalidated
= false;
1839 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1840 if (inode
->i_nlink
!= fattr
->nlink
) {
1841 invalid
|= NFS_INO_INVALID_ATTR
;
1842 if (S_ISDIR(inode
->i_mode
))
1843 invalid
|= NFS_INO_INVALID_DATA
;
1844 set_nlink(inode
, fattr
->nlink
);
1846 } else if (server
->caps
& NFS_CAP_NLINK
) {
1847 nfsi
->cache_validity
|= save_cache_validity
&
1848 (NFS_INO_INVALID_ATTR
1849 | NFS_INO_REVAL_FORCED
);
1850 cache_revalidated
= false;
1853 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1855 * report the blocks in 512byte units
1857 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1858 } else if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1859 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1861 cache_revalidated
= false;
1863 /* Update attrtimeo value if we're out of the unstable period */
1864 if (invalid
& NFS_INO_INVALID_ATTR
) {
1865 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1866 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1867 nfsi
->attrtimeo_timestamp
= now
;
1868 /* Set barrier to be more recent than all outstanding updates */
1869 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1871 if (cache_revalidated
) {
1872 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
,
1873 nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1874 nfsi
->attrtimeo
<<= 1;
1875 if (nfsi
->attrtimeo
> NFS_MAXATTRTIMEO(inode
))
1876 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1878 nfsi
->attrtimeo_timestamp
= now
;
1880 /* Set the barrier to be more recent than this fattr */
1881 if ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
> 0)
1882 nfsi
->attr_gencount
= fattr
->gencount
;
1885 /* Don't declare attrcache up to date if there were no attrs! */
1886 if (cache_revalidated
)
1887 invalid
&= ~NFS_INO_INVALID_ATTR
;
1889 /* Don't invalidate the data if we were to blame */
1890 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1891 || S_ISLNK(inode
->i_mode
)))
1892 invalid
&= ~NFS_INO_INVALID_DATA
;
1893 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1894 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1895 nfs_set_cache_invalid(inode
, invalid
);
1900 * No need to worry about unhashing the dentry, as the
1901 * lookup validation will know that the inode is bad.
1902 * (But we fall through to invalidate the caches.)
1904 nfs_invalidate_inode(inode
);
1908 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1910 struct nfs_inode
*nfsi
;
1911 nfsi
= kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1915 nfsi
->cache_validity
= 0UL;
1916 #if IS_ENABLED(CONFIG_NFS_V4)
1917 nfsi
->nfs4_acl
= NULL
;
1918 #endif /* CONFIG_NFS_V4 */
1919 return &nfsi
->vfs_inode
;
1921 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1923 static void nfs_i_callback(struct rcu_head
*head
)
1925 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1926 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1929 void nfs_destroy_inode(struct inode
*inode
)
1931 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1933 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1935 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1937 #if IS_ENABLED(CONFIG_NFS_V4)
1938 INIT_LIST_HEAD(&nfsi
->open_states
);
1939 nfsi
->delegation
= NULL
;
1940 init_rwsem(&nfsi
->rwsem
);
1941 nfsi
->layout
= NULL
;
1945 static void init_once(void *foo
)
1947 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1949 inode_init_once(&nfsi
->vfs_inode
);
1950 INIT_LIST_HEAD(&nfsi
->open_files
);
1951 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1952 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1953 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1954 nfsi
->nrequests
= 0;
1955 nfsi
->commit_info
.ncommit
= 0;
1956 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1957 init_rwsem(&nfsi
->rmdir_sem
);
1958 nfs4_init_once(nfsi
);
1961 static int __init
nfs_init_inodecache(void)
1963 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1964 sizeof(struct nfs_inode
),
1965 0, (SLAB_RECLAIM_ACCOUNT
|
1966 SLAB_MEM_SPREAD
|SLAB_ACCOUNT
),
1968 if (nfs_inode_cachep
== NULL
)
1974 static void nfs_destroy_inodecache(void)
1977 * Make sure all delayed rcu free inodes are flushed before we
1981 kmem_cache_destroy(nfs_inode_cachep
);
1984 struct workqueue_struct
*nfsiod_workqueue
;
1985 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1988 * start up the nfsiod workqueue
1990 static int nfsiod_start(void)
1992 struct workqueue_struct
*wq
;
1993 dprintk("RPC: creating workqueue nfsiod\n");
1994 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
1997 nfsiod_workqueue
= wq
;
2002 * Destroy the nfsiod workqueue
2004 static void nfsiod_stop(void)
2006 struct workqueue_struct
*wq
;
2008 wq
= nfsiod_workqueue
;
2011 nfsiod_workqueue
= NULL
;
2012 destroy_workqueue(wq
);
2016 EXPORT_SYMBOL_GPL(nfs_net_id
);
2018 static int nfs_net_init(struct net
*net
)
2020 nfs_clients_init(net
);
2021 return nfs_fs_proc_net_init(net
);
2024 static void nfs_net_exit(struct net
*net
)
2026 nfs_fs_proc_net_exit(net
);
2027 nfs_cleanup_cb_ident_idr(net
);
2030 static struct pernet_operations nfs_net_ops
= {
2031 .init
= nfs_net_init
,
2032 .exit
= nfs_net_exit
,
2034 .size
= sizeof(struct nfs_net
),
2040 static int __init
init_nfs_fs(void)
2044 err
= register_pernet_subsys(&nfs_net_ops
);
2048 err
= nfs_fscache_register();
2052 err
= nfsiod_start();
2056 err
= nfs_fs_proc_init();
2060 err
= nfs_init_nfspagecache();
2064 err
= nfs_init_inodecache();
2068 err
= nfs_init_readpagecache();
2072 err
= nfs_init_writepagecache();
2076 err
= nfs_init_directcache();
2080 rpc_proc_register(&init_net
, &nfs_rpcstat
);
2082 err
= register_nfs_fs();
2088 rpc_proc_unregister(&init_net
, "nfs");
2089 nfs_destroy_directcache();
2091 nfs_destroy_writepagecache();
2093 nfs_destroy_readpagecache();
2095 nfs_destroy_inodecache();
2097 nfs_destroy_nfspagecache();
2103 nfs_fscache_unregister();
2105 unregister_pernet_subsys(&nfs_net_ops
);
2110 static void __exit
exit_nfs_fs(void)
2112 nfs_destroy_directcache();
2113 nfs_destroy_writepagecache();
2114 nfs_destroy_readpagecache();
2115 nfs_destroy_inodecache();
2116 nfs_destroy_nfspagecache();
2117 nfs_fscache_unregister();
2118 unregister_pernet_subsys(&nfs_net_ops
);
2119 rpc_proc_unregister(&init_net
, "nfs");
2120 unregister_nfs_fs();
2125 /* Not quite true; I just maintain it */
2126 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2127 MODULE_LICENSE("GPL");
2128 module_param(enable_ino64
, bool, 0644);
2130 module_init(init_nfs_fs
)
2131 module_exit(exit_nfs_fs
)