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 inode
->i_mode
= fattr
->mode
;
286 nfs_copy_fh(NFS_FH(inode
), desc
->fh
);
290 #ifdef CONFIG_NFS_V4_SECURITY_LABEL
291 static void nfs_clear_label_invalid(struct inode
*inode
)
293 spin_lock(&inode
->i_lock
);
294 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_LABEL
;
295 spin_unlock(&inode
->i_lock
);
298 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
299 struct nfs4_label
*label
)
306 if ((fattr
->valid
& NFS_ATTR_FATTR_V4_SECURITY_LABEL
) && inode
->i_security
) {
307 error
= security_inode_notifysecctx(inode
, label
->label
,
310 printk(KERN_ERR
"%s() %s %d "
311 "security_inode_notifysecctx() %d\n",
313 (char *)label
->label
,
315 nfs_clear_label_invalid(inode
);
319 struct nfs4_label
*nfs4_label_alloc(struct nfs_server
*server
, gfp_t flags
)
321 struct nfs4_label
*label
= NULL
;
322 int minor_version
= server
->nfs_client
->cl_minorversion
;
324 if (minor_version
< 2)
327 if (!(server
->caps
& NFS_CAP_SECURITY_LABEL
))
330 label
= kzalloc(sizeof(struct nfs4_label
), flags
);
332 return ERR_PTR(-ENOMEM
);
334 label
->label
= kzalloc(NFS4_MAXLABELLEN
, flags
);
335 if (label
->label
== NULL
) {
337 return ERR_PTR(-ENOMEM
);
339 label
->len
= NFS4_MAXLABELLEN
;
343 EXPORT_SYMBOL_GPL(nfs4_label_alloc
);
345 void nfs_setsecurity(struct inode
*inode
, struct nfs_fattr
*fattr
,
346 struct nfs4_label
*label
)
350 EXPORT_SYMBOL_GPL(nfs_setsecurity
);
353 * This is our front-end to iget that looks up inodes by file handle
354 * instead of inode number.
357 nfs_fhget(struct super_block
*sb
, struct nfs_fh
*fh
, struct nfs_fattr
*fattr
, struct nfs4_label
*label
)
359 struct nfs_find_desc desc
= {
363 struct inode
*inode
= ERR_PTR(-ENOENT
);
366 nfs_attr_check_mountpoint(sb
, fattr
);
368 if (nfs_attr_use_mounted_on_fileid(fattr
))
369 fattr
->fileid
= fattr
->mounted_on_fileid
;
370 else if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) == 0)
372 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) == 0)
375 hash
= nfs_fattr_to_ino_t(fattr
);
377 inode
= iget5_locked(sb
, hash
, nfs_find_actor
, nfs_init_locked
, &desc
);
379 inode
= ERR_PTR(-ENOMEM
);
383 if (inode
->i_state
& I_NEW
) {
384 struct nfs_inode
*nfsi
= NFS_I(inode
);
385 unsigned long now
= jiffies
;
387 /* We set i_ino for the few things that still rely on it,
391 /* We can't support update_atime(), since the server will reset it */
392 inode
->i_flags
|= S_NOATIME
|S_NOCMTIME
;
393 inode
->i_mode
= fattr
->mode
;
394 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) == 0
395 && nfs_server_capable(inode
, NFS_CAP_MODE
))
396 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
397 /* Why so? Because we want revalidate for devices/FIFOs, and
398 * that's precisely what we have in nfs_file_inode_operations.
400 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_inode_ops
;
401 if (S_ISREG(inode
->i_mode
)) {
402 inode
->i_fop
= NFS_SB(sb
)->nfs_client
->rpc_ops
->file_ops
;
403 inode
->i_data
.a_ops
= &nfs_file_aops
;
404 } else if (S_ISDIR(inode
->i_mode
)) {
405 inode
->i_op
= NFS_SB(sb
)->nfs_client
->rpc_ops
->dir_inode_ops
;
406 inode
->i_fop
= &nfs_dir_operations
;
407 inode
->i_data
.a_ops
= &nfs_dir_aops
;
408 /* Deal with crossing mountpoints */
409 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTPOINT
||
410 fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
) {
411 if (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)
412 inode
->i_op
= &nfs_referral_inode_operations
;
414 inode
->i_op
= &nfs_mountpoint_inode_operations
;
416 inode
->i_flags
|= S_AUTOMOUNT
;
418 } else if (S_ISLNK(inode
->i_mode
)) {
419 inode
->i_op
= &nfs_symlink_inode_operations
;
420 inode_nohighmem(inode
);
422 init_special_inode(inode
, inode
->i_mode
, fattr
->rdev
);
424 memset(&inode
->i_atime
, 0, sizeof(inode
->i_atime
));
425 memset(&inode
->i_mtime
, 0, sizeof(inode
->i_mtime
));
426 memset(&inode
->i_ctime
, 0, sizeof(inode
->i_ctime
));
427 inode
->i_version
= 0;
430 inode
->i_uid
= make_kuid(&init_user_ns
, -2);
431 inode
->i_gid
= make_kgid(&init_user_ns
, -2);
433 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
437 nfsi
->read_cache_jiffies
= fattr
->time_start
;
438 nfsi
->attr_gencount
= fattr
->gencount
;
439 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
440 inode
->i_atime
= fattr
->atime
;
441 else if (nfs_server_capable(inode
, NFS_CAP_ATIME
))
442 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
443 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
444 inode
->i_mtime
= fattr
->mtime
;
445 else if (nfs_server_capable(inode
, NFS_CAP_MTIME
))
446 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
447 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
448 inode
->i_ctime
= fattr
->ctime
;
449 else if (nfs_server_capable(inode
, NFS_CAP_CTIME
))
450 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
451 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
452 inode
->i_version
= fattr
->change_attr
;
454 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
455 | NFS_INO_REVAL_PAGECACHE
);
456 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
457 inode
->i_size
= nfs_size_to_loff_t(fattr
->size
);
459 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
460 | NFS_INO_REVAL_PAGECACHE
);
461 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
)
462 set_nlink(inode
, fattr
->nlink
);
463 else if (nfs_server_capable(inode
, NFS_CAP_NLINK
))
464 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
465 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
)
466 inode
->i_uid
= fattr
->uid
;
467 else if (nfs_server_capable(inode
, NFS_CAP_OWNER
))
468 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
469 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
)
470 inode
->i_gid
= fattr
->gid
;
471 else if (nfs_server_capable(inode
, NFS_CAP_OWNER_GROUP
))
472 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ATTR
);
473 if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
474 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
475 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
477 * report the blocks in 512byte units
479 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
482 nfs_setsecurity(inode
, fattr
, label
);
484 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
485 nfsi
->attrtimeo_timestamp
= now
;
486 nfsi
->access_cache
= RB_ROOT
;
488 nfs_fscache_init_inode(inode
);
490 unlock_new_inode(inode
);
492 nfs_refresh_inode(inode
, fattr
);
493 dprintk("NFS: nfs_fhget(%s/%Lu fh_crc=0x%08x ct=%d)\n",
495 (unsigned long long)NFS_FILEID(inode
),
496 nfs_display_fhandle_hash(fh
),
497 atomic_read(&inode
->i_count
));
503 dprintk("nfs_fhget: iget failed with error %ld\n", PTR_ERR(inode
));
506 EXPORT_SYMBOL_GPL(nfs_fhget
);
508 #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)
511 nfs_setattr(struct dentry
*dentry
, struct iattr
*attr
)
513 struct inode
*inode
= d_inode(dentry
);
514 struct nfs_fattr
*fattr
;
517 nfs_inc_stats(inode
, NFSIOS_VFSSETATTR
);
519 /* skip mode change if it's just for clearing setuid/setgid */
520 if (attr
->ia_valid
& (ATTR_KILL_SUID
| ATTR_KILL_SGID
))
521 attr
->ia_valid
&= ~ATTR_MODE
;
523 if (attr
->ia_valid
& ATTR_SIZE
) {
524 BUG_ON(!S_ISREG(inode
->i_mode
));
526 error
= inode_newsize_ok(inode
, attr
->ia_size
);
530 if (attr
->ia_size
== i_size_read(inode
))
531 attr
->ia_valid
&= ~ATTR_SIZE
;
534 /* Optimization: if the end result is no change, don't RPC */
535 attr
->ia_valid
&= NFS_VALID_ATTRS
;
536 if ((attr
->ia_valid
& ~(ATTR_FILE
|ATTR_OPEN
)) == 0)
539 trace_nfs_setattr_enter(inode
);
541 /* Write all dirty data */
542 if (S_ISREG(inode
->i_mode
))
543 nfs_sync_inode(inode
);
545 fattr
= nfs_alloc_fattr();
552 * Return any delegations if we're going to change ACLs
554 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0)
555 NFS_PROTO(inode
)->return_delegation(inode
);
556 error
= NFS_PROTO(inode
)->setattr(dentry
, fattr
, attr
);
558 error
= nfs_refresh_inode(inode
, fattr
);
559 nfs_free_fattr(fattr
);
561 trace_nfs_setattr_exit(inode
, error
);
564 EXPORT_SYMBOL_GPL(nfs_setattr
);
567 * nfs_vmtruncate - unmap mappings "freed" by truncate() syscall
568 * @inode: inode of the file used
569 * @offset: file offset to start truncating
571 * This is a copy of the common vmtruncate, but with the locking
572 * corrected to take into account the fact that NFS requires
573 * inode->i_size to be updated under the inode->i_lock.
574 * Note: must be called with inode->i_lock held!
576 static int nfs_vmtruncate(struct inode
* inode
, loff_t offset
)
580 err
= inode_newsize_ok(inode
, offset
);
584 i_size_write(inode
, offset
);
587 NFS_I(inode
)->cache_validity
&= ~NFS_INO_INVALID_DATA
;
589 spin_unlock(&inode
->i_lock
);
590 truncate_pagecache(inode
, offset
);
591 spin_lock(&inode
->i_lock
);
597 * nfs_setattr_update_inode - Update inode metadata after a setattr call.
598 * @inode: pointer to struct inode
599 * @attr: pointer to struct iattr
601 * Note: we do this in the *proc.c in order to ensure that
602 * it works for things like exclusive creates too.
604 void nfs_setattr_update_inode(struct inode
*inode
, struct iattr
*attr
,
605 struct nfs_fattr
*fattr
)
607 /* Barrier: bump the attribute generation count. */
608 nfs_fattr_set_barrier(fattr
);
610 spin_lock(&inode
->i_lock
);
611 NFS_I(inode
)->attr_gencount
= fattr
->gencount
;
612 if ((attr
->ia_valid
& (ATTR_MODE
|ATTR_UID
|ATTR_GID
)) != 0) {
613 if ((attr
->ia_valid
& ATTR_MODE
) != 0) {
614 int mode
= attr
->ia_mode
& S_IALLUGO
;
615 mode
|= inode
->i_mode
& ~S_IALLUGO
;
616 inode
->i_mode
= mode
;
618 if ((attr
->ia_valid
& ATTR_UID
) != 0)
619 inode
->i_uid
= attr
->ia_uid
;
620 if ((attr
->ia_valid
& ATTR_GID
) != 0)
621 inode
->i_gid
= attr
->ia_gid
;
622 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_ACCESS
623 | NFS_INO_INVALID_ACL
);
625 if ((attr
->ia_valid
& ATTR_SIZE
) != 0) {
626 nfs_inc_stats(inode
, NFSIOS_SETATTRTRUNC
);
627 nfs_vmtruncate(inode
, attr
->ia_size
);
630 nfs_update_inode(inode
, fattr
);
632 NFS_I(inode
)->cache_validity
|= NFS_INO_INVALID_ATTR
;
633 spin_unlock(&inode
->i_lock
);
635 EXPORT_SYMBOL_GPL(nfs_setattr_update_inode
);
637 static void nfs_request_parent_use_readdirplus(struct dentry
*dentry
)
639 struct dentry
*parent
;
641 parent
= dget_parent(dentry
);
642 nfs_force_use_readdirplus(d_inode(parent
));
646 static bool nfs_need_revalidate_inode(struct inode
*inode
)
648 if (NFS_I(inode
)->cache_validity
&
649 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
651 if (nfs_attribute_cache_expired(inode
))
656 int nfs_getattr(struct vfsmount
*mnt
, struct dentry
*dentry
, struct kstat
*stat
)
658 struct inode
*inode
= d_inode(dentry
);
659 int need_atime
= NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ATIME
;
662 trace_nfs_getattr_enter(inode
);
663 /* Flush out writes to the server in order to update c/mtime. */
664 if (S_ISREG(inode
->i_mode
)) {
666 err
= nfs_sync_inode(inode
);
673 * We may force a getattr if the user cares about atime.
675 * Note that we only have to check the vfsmount flags here:
676 * - NFS always sets S_NOATIME by so checking it would give a
678 * - NFS never sets MS_NOATIME or MS_NODIRATIME so there is
679 * no point in checking those.
681 if ((mnt
->mnt_flags
& MNT_NOATIME
) ||
682 ((mnt
->mnt_flags
& MNT_NODIRATIME
) && S_ISDIR(inode
->i_mode
)))
685 if (need_atime
|| nfs_need_revalidate_inode(inode
)) {
686 struct nfs_server
*server
= NFS_SERVER(inode
);
688 if (server
->caps
& NFS_CAP_READDIRPLUS
)
689 nfs_request_parent_use_readdirplus(dentry
);
690 err
= __nfs_revalidate_inode(server
, inode
);
693 generic_fillattr(inode
, stat
);
694 stat
->ino
= nfs_compat_user_ino64(NFS_FILEID(inode
));
695 if (S_ISDIR(inode
->i_mode
))
696 stat
->blksize
= NFS_SERVER(inode
)->dtsize
;
699 trace_nfs_getattr_exit(inode
, err
);
702 EXPORT_SYMBOL_GPL(nfs_getattr
);
704 static void nfs_init_lock_context(struct nfs_lock_context
*l_ctx
)
706 atomic_set(&l_ctx
->count
, 1);
707 l_ctx
->lockowner
.l_owner
= current
->files
;
708 l_ctx
->lockowner
.l_pid
= current
->tgid
;
709 INIT_LIST_HEAD(&l_ctx
->list
);
710 atomic_set(&l_ctx
->io_count
, 0);
713 static struct nfs_lock_context
*__nfs_find_lock_context(struct nfs_open_context
*ctx
)
715 struct nfs_lock_context
*head
= &ctx
->lock_context
;
716 struct nfs_lock_context
*pos
= head
;
719 if (pos
->lockowner
.l_owner
!= current
->files
)
721 if (pos
->lockowner
.l_pid
!= current
->tgid
)
723 atomic_inc(&pos
->count
);
725 } while ((pos
= list_entry(pos
->list
.next
, typeof(*pos
), list
)) != head
);
729 struct nfs_lock_context
*nfs_get_lock_context(struct nfs_open_context
*ctx
)
731 struct nfs_lock_context
*res
, *new = NULL
;
732 struct inode
*inode
= d_inode(ctx
->dentry
);
734 spin_lock(&inode
->i_lock
);
735 res
= __nfs_find_lock_context(ctx
);
737 spin_unlock(&inode
->i_lock
);
738 new = kmalloc(sizeof(*new), GFP_KERNEL
);
740 return ERR_PTR(-ENOMEM
);
741 nfs_init_lock_context(new);
742 spin_lock(&inode
->i_lock
);
743 res
= __nfs_find_lock_context(ctx
);
745 list_add_tail(&new->list
, &ctx
->lock_context
.list
);
746 new->open_context
= ctx
;
751 spin_unlock(&inode
->i_lock
);
755 EXPORT_SYMBOL_GPL(nfs_get_lock_context
);
757 void nfs_put_lock_context(struct nfs_lock_context
*l_ctx
)
759 struct nfs_open_context
*ctx
= l_ctx
->open_context
;
760 struct inode
*inode
= d_inode(ctx
->dentry
);
762 if (!atomic_dec_and_lock(&l_ctx
->count
, &inode
->i_lock
))
764 list_del(&l_ctx
->list
);
765 spin_unlock(&inode
->i_lock
);
768 EXPORT_SYMBOL_GPL(nfs_put_lock_context
);
771 * nfs_close_context - Common close_context() routine NFSv2/v3
772 * @ctx: pointer to context
773 * @is_sync: is this a synchronous close
775 * Ensure that the attributes are up to date if we're mounted
776 * with close-to-open semantics and we have cached data that will
777 * need to be revalidated on open.
779 void nfs_close_context(struct nfs_open_context
*ctx
, int is_sync
)
781 struct nfs_inode
*nfsi
;
783 struct nfs_server
*server
;
785 if (!(ctx
->mode
& FMODE_WRITE
))
789 inode
= d_inode(ctx
->dentry
);
791 if (inode
->i_mapping
->nrpages
== 0)
793 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
795 if (!list_empty(&nfsi
->open_files
))
797 server
= NFS_SERVER(inode
);
798 if (server
->flags
& NFS_MOUNT_NOCTO
)
800 nfs_revalidate_inode(server
, inode
);
802 EXPORT_SYMBOL_GPL(nfs_close_context
);
804 struct nfs_open_context
*alloc_nfs_open_context(struct dentry
*dentry
, fmode_t f_mode
)
806 struct nfs_open_context
*ctx
;
807 struct rpc_cred
*cred
= rpc_lookup_cred();
809 return ERR_CAST(cred
);
811 ctx
= kmalloc(sizeof(*ctx
), GFP_KERNEL
);
814 return ERR_PTR(-ENOMEM
);
816 nfs_sb_active(dentry
->d_sb
);
817 ctx
->dentry
= dget(dentry
);
823 nfs_init_lock_context(&ctx
->lock_context
);
824 ctx
->lock_context
.open_context
= ctx
;
825 INIT_LIST_HEAD(&ctx
->list
);
826 ctx
->mdsthreshold
= NULL
;
829 EXPORT_SYMBOL_GPL(alloc_nfs_open_context
);
831 struct nfs_open_context
*get_nfs_open_context(struct nfs_open_context
*ctx
)
834 atomic_inc(&ctx
->lock_context
.count
);
837 EXPORT_SYMBOL_GPL(get_nfs_open_context
);
839 static void __put_nfs_open_context(struct nfs_open_context
*ctx
, int is_sync
)
841 struct inode
*inode
= d_inode(ctx
->dentry
);
842 struct super_block
*sb
= ctx
->dentry
->d_sb
;
844 if (!list_empty(&ctx
->list
)) {
845 if (!atomic_dec_and_lock(&ctx
->lock_context
.count
, &inode
->i_lock
))
847 list_del(&ctx
->list
);
848 spin_unlock(&inode
->i_lock
);
849 } else if (!atomic_dec_and_test(&ctx
->lock_context
.count
))
852 NFS_PROTO(inode
)->close_context(ctx
, is_sync
);
853 if (ctx
->cred
!= NULL
)
854 put_rpccred(ctx
->cred
);
857 kfree(ctx
->mdsthreshold
);
861 void put_nfs_open_context(struct nfs_open_context
*ctx
)
863 __put_nfs_open_context(ctx
, 0);
865 EXPORT_SYMBOL_GPL(put_nfs_open_context
);
867 static void put_nfs_open_context_sync(struct nfs_open_context
*ctx
)
869 __put_nfs_open_context(ctx
, 1);
873 * Ensure that mmap has a recent RPC credential for use when writing out
876 void nfs_inode_attach_open_context(struct nfs_open_context
*ctx
)
878 struct inode
*inode
= d_inode(ctx
->dentry
);
879 struct nfs_inode
*nfsi
= NFS_I(inode
);
881 spin_lock(&inode
->i_lock
);
882 list_add(&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
))
976 fattr
= nfs_alloc_fattr();
980 nfs_inc_stats(inode
, NFSIOS_INODEREVALIDATE
);
982 label
= nfs4_label_alloc(NFS_SERVER(inode
), GFP_KERNEL
);
984 status
= PTR_ERR(label
);
988 status
= NFS_PROTO(inode
)->getattr(server
, NFS_FH(inode
), fattr
, label
);
990 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) getattr failed, error=%d\n",
992 (unsigned long long)NFS_FILEID(inode
), status
);
993 if (status
== -ESTALE
) {
994 nfs_zap_caches(inode
);
995 if (!S_ISDIR(inode
->i_mode
))
996 set_bit(NFS_INO_STALE
, &NFS_I(inode
)->flags
);
1001 status
= nfs_refresh_inode(inode
, fattr
);
1003 dfprintk(PAGECACHE
, "nfs_revalidate_inode: (%s/%Lu) refresh failed, error=%d\n",
1005 (unsigned long long)NFS_FILEID(inode
), status
);
1009 if (nfsi
->cache_validity
& NFS_INO_INVALID_ACL
)
1010 nfs_zap_acl_cache(inode
);
1012 nfs_setsecurity(inode
, fattr
, label
);
1014 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) revalidation complete\n",
1016 (unsigned long long)NFS_FILEID(inode
));
1019 nfs4_label_free(label
);
1021 nfs_free_fattr(fattr
);
1022 trace_nfs_revalidate_inode_exit(inode
, status
);
1026 int nfs_attribute_timeout(struct inode
*inode
)
1028 struct nfs_inode
*nfsi
= NFS_I(inode
);
1030 return !time_in_range_open(jiffies
, nfsi
->read_cache_jiffies
, nfsi
->read_cache_jiffies
+ nfsi
->attrtimeo
);
1033 int nfs_attribute_cache_expired(struct inode
*inode
)
1035 if (nfs_have_delegated_attributes(inode
))
1037 return nfs_attribute_timeout(inode
);
1041 * nfs_revalidate_inode - Revalidate the inode attributes
1042 * @server - pointer to nfs_server struct
1043 * @inode - pointer to inode struct
1045 * Updates inode attribute information by retrieving the data from the server.
1047 int nfs_revalidate_inode(struct nfs_server
*server
, struct inode
*inode
)
1049 if (!nfs_need_revalidate_inode(inode
))
1050 return NFS_STALE(inode
) ? -ESTALE
: 0;
1051 return __nfs_revalidate_inode(server
, inode
);
1053 EXPORT_SYMBOL_GPL(nfs_revalidate_inode
);
1055 int nfs_revalidate_inode_rcu(struct nfs_server
*server
, struct inode
*inode
)
1057 if (!(NFS_I(inode
)->cache_validity
&
1058 (NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_LABEL
))
1059 && !nfs_attribute_cache_expired(inode
))
1060 return NFS_STALE(inode
) ? -ESTALE
: 0;
1064 static int nfs_invalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1066 struct nfs_inode
*nfsi
= NFS_I(inode
);
1069 if (mapping
->nrpages
!= 0) {
1070 if (S_ISREG(inode
->i_mode
)) {
1071 unmap_mapping_range(mapping
, 0, 0, 0);
1072 ret
= nfs_sync_mapping(mapping
);
1076 ret
= invalidate_inode_pages2(mapping
);
1080 if (S_ISDIR(inode
->i_mode
)) {
1081 spin_lock(&inode
->i_lock
);
1082 memset(nfsi
->cookieverf
, 0, sizeof(nfsi
->cookieverf
));
1083 spin_unlock(&inode
->i_lock
);
1085 nfs_inc_stats(inode
, NFSIOS_DATAINVALIDATE
);
1086 nfs_fscache_wait_on_invalidate(inode
);
1088 dfprintk(PAGECACHE
, "NFS: (%s/%Lu) data cache invalidated\n",
1090 (unsigned long long)NFS_FILEID(inode
));
1094 static bool nfs_mapping_need_revalidate_inode(struct inode
*inode
)
1096 if (nfs_have_delegated_attributes(inode
))
1098 return (NFS_I(inode
)->cache_validity
& NFS_INO_REVAL_PAGECACHE
)
1099 || nfs_attribute_timeout(inode
)
1100 || NFS_STALE(inode
);
1103 int nfs_revalidate_mapping_rcu(struct inode
*inode
)
1105 struct nfs_inode
*nfsi
= NFS_I(inode
);
1106 unsigned long *bitlock
= &nfsi
->flags
;
1109 if (IS_SWAPFILE(inode
))
1111 if (nfs_mapping_need_revalidate_inode(inode
)) {
1115 spin_lock(&inode
->i_lock
);
1116 if (test_bit(NFS_INO_INVALIDATING
, bitlock
) ||
1117 (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
))
1119 spin_unlock(&inode
->i_lock
);
1125 * __nfs_revalidate_mapping - Revalidate the pagecache
1126 * @inode - pointer to host inode
1127 * @mapping - pointer to mapping
1128 * @may_lock - take inode->i_mutex?
1130 static int __nfs_revalidate_mapping(struct inode
*inode
,
1131 struct address_space
*mapping
,
1134 struct nfs_inode
*nfsi
= NFS_I(inode
);
1135 unsigned long *bitlock
= &nfsi
->flags
;
1138 /* swapfiles are not supposed to be shared. */
1139 if (IS_SWAPFILE(inode
))
1142 if (nfs_mapping_need_revalidate_inode(inode
)) {
1143 ret
= __nfs_revalidate_inode(NFS_SERVER(inode
), inode
);
1149 * We must clear NFS_INO_INVALID_DATA first to ensure that
1150 * invalidations that come in while we're shooting down the mappings
1151 * are respected. But, that leaves a race window where one revalidator
1152 * can clear the flag, and then another checks it before the mapping
1153 * gets invalidated. Fix that by serializing access to this part of
1156 * At the same time, we need to allow other tasks to see whether we
1157 * might be in the middle of invalidating the pages, so we only set
1158 * the bit lock here if it looks like we're going to be doing that.
1161 ret
= wait_on_bit_action(bitlock
, NFS_INO_INVALIDATING
,
1162 nfs_wait_bit_killable
, TASK_KILLABLE
);
1165 spin_lock(&inode
->i_lock
);
1166 if (test_bit(NFS_INO_INVALIDATING
, bitlock
)) {
1167 spin_unlock(&inode
->i_lock
);
1170 if (nfsi
->cache_validity
& NFS_INO_INVALID_DATA
)
1172 spin_unlock(&inode
->i_lock
);
1176 set_bit(NFS_INO_INVALIDATING
, bitlock
);
1178 nfsi
->cache_validity
&= ~NFS_INO_INVALID_DATA
;
1179 spin_unlock(&inode
->i_lock
);
1180 trace_nfs_invalidate_mapping_enter(inode
);
1183 ret
= nfs_invalidate_mapping(inode
, mapping
);
1184 inode_unlock(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
);
1197 * nfs_revalidate_mapping - Revalidate the pagecache
1198 * @inode - pointer to host inode
1199 * @mapping - pointer to mapping
1201 int nfs_revalidate_mapping(struct inode
*inode
, struct address_space
*mapping
)
1203 return __nfs_revalidate_mapping(inode
, mapping
, false);
1207 * nfs_revalidate_mapping_protected - Revalidate the pagecache
1208 * @inode - pointer to host inode
1209 * @mapping - pointer to mapping
1211 * Differs from nfs_revalidate_mapping() in that it grabs the inode->i_mutex
1212 * while invalidating the mapping.
1214 int nfs_revalidate_mapping_protected(struct inode
*inode
, struct address_space
*mapping
)
1216 return __nfs_revalidate_mapping(inode
, mapping
, true);
1219 static unsigned long nfs_wcc_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1221 struct nfs_inode
*nfsi
= NFS_I(inode
);
1222 unsigned long ret
= 0;
1224 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
)
1225 && (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
)
1226 && inode
->i_version
== fattr
->pre_change_attr
) {
1227 inode
->i_version
= fattr
->change_attr
;
1228 if (S_ISDIR(inode
->i_mode
))
1229 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1230 ret
|= NFS_INO_INVALID_ATTR
;
1232 /* If we have atomic WCC data, we may update some attributes */
1233 if ((fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
)
1234 && (fattr
->valid
& NFS_ATTR_FATTR_CTIME
)
1235 && timespec_equal(&inode
->i_ctime
, &fattr
->pre_ctime
)) {
1236 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1237 ret
|= NFS_INO_INVALID_ATTR
;
1240 if ((fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
)
1241 && (fattr
->valid
& NFS_ATTR_FATTR_MTIME
)
1242 && timespec_equal(&inode
->i_mtime
, &fattr
->pre_mtime
)) {
1243 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1244 if (S_ISDIR(inode
->i_mode
))
1245 nfs_set_cache_invalid(inode
, NFS_INO_INVALID_DATA
);
1246 ret
|= NFS_INO_INVALID_ATTR
;
1248 if ((fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
)
1249 && (fattr
->valid
& NFS_ATTR_FATTR_SIZE
)
1250 && i_size_read(inode
) == nfs_size_to_loff_t(fattr
->pre_size
)
1251 && nfsi
->nrequests
== 0) {
1252 i_size_write(inode
, nfs_size_to_loff_t(fattr
->size
));
1253 ret
|= NFS_INO_INVALID_ATTR
;
1260 * nfs_check_inode_attributes - verify consistency of the inode attribute cache
1261 * @inode - pointer to inode
1262 * @fattr - updated attributes
1264 * Verifies the attribute cache. If we have just changed the attributes,
1265 * so that fattr carries weak cache consistency data, then it may
1266 * also update the ctime/mtime/change_attribute.
1268 static int nfs_check_inode_attributes(struct inode
*inode
, struct nfs_fattr
*fattr
)
1270 struct nfs_inode
*nfsi
= NFS_I(inode
);
1271 loff_t cur_size
, new_isize
;
1272 unsigned long invalid
= 0;
1275 if (nfs_have_delegated_attributes(inode
))
1277 /* Has the inode gone and changed behind our back? */
1278 if ((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) && nfsi
->fileid
!= fattr
->fileid
)
1280 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
))
1283 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1284 inode
->i_version
!= fattr
->change_attr
)
1285 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1287 /* Verify a few of the more important attributes */
1288 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) && !timespec_equal(&inode
->i_mtime
, &fattr
->mtime
))
1289 invalid
|= NFS_INO_INVALID_ATTR
;
1291 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1292 cur_size
= i_size_read(inode
);
1293 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1294 if (cur_size
!= new_isize
)
1295 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1297 if (nfsi
->nrequests
!= 0)
1298 invalid
&= ~NFS_INO_REVAL_PAGECACHE
;
1300 /* Have any file permissions changed? */
1301 if ((fattr
->valid
& NFS_ATTR_FATTR_MODE
) && (inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
))
1302 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1303 if ((fattr
->valid
& NFS_ATTR_FATTR_OWNER
) && !uid_eq(inode
->i_uid
, fattr
->uid
))
1304 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1305 if ((fattr
->valid
& NFS_ATTR_FATTR_GROUP
) && !gid_eq(inode
->i_gid
, fattr
->gid
))
1306 invalid
|= NFS_INO_INVALID_ATTR
| NFS_INO_INVALID_ACCESS
| NFS_INO_INVALID_ACL
;
1308 /* Has the link count changed? */
1309 if ((fattr
->valid
& NFS_ATTR_FATTR_NLINK
) && inode
->i_nlink
!= fattr
->nlink
)
1310 invalid
|= NFS_INO_INVALID_ATTR
;
1312 if ((fattr
->valid
& NFS_ATTR_FATTR_ATIME
) && !timespec_equal(&inode
->i_atime
, &fattr
->atime
))
1313 invalid
|= NFS_INO_INVALID_ATIME
;
1316 nfs_set_cache_invalid(inode
, invalid
);
1318 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1322 static atomic_long_t nfs_attr_generation_counter
;
1324 static unsigned long nfs_read_attr_generation_counter(void)
1326 return atomic_long_read(&nfs_attr_generation_counter
);
1329 unsigned long nfs_inc_attr_generation_counter(void)
1331 return atomic_long_inc_return(&nfs_attr_generation_counter
);
1333 EXPORT_SYMBOL_GPL(nfs_inc_attr_generation_counter
);
1335 void nfs_fattr_init(struct nfs_fattr
*fattr
)
1338 fattr
->time_start
= jiffies
;
1339 fattr
->gencount
= nfs_inc_attr_generation_counter();
1340 fattr
->owner_name
= NULL
;
1341 fattr
->group_name
= NULL
;
1343 EXPORT_SYMBOL_GPL(nfs_fattr_init
);
1346 * nfs_fattr_set_barrier
1347 * @fattr: attributes
1349 * Used to set a barrier after an attribute was updated. This
1350 * barrier ensures that older attributes from RPC calls that may
1351 * have raced with our update cannot clobber these new values.
1352 * Note that you are still responsible for ensuring that other
1353 * operations which change the attribute on the server do not
1356 void nfs_fattr_set_barrier(struct nfs_fattr
*fattr
)
1358 fattr
->gencount
= nfs_inc_attr_generation_counter();
1361 struct nfs_fattr
*nfs_alloc_fattr(void)
1363 struct nfs_fattr
*fattr
;
1365 fattr
= kmalloc(sizeof(*fattr
), GFP_NOFS
);
1367 nfs_fattr_init(fattr
);
1370 EXPORT_SYMBOL_GPL(nfs_alloc_fattr
);
1372 struct nfs_fh
*nfs_alloc_fhandle(void)
1376 fh
= kmalloc(sizeof(struct nfs_fh
), GFP_NOFS
);
1381 EXPORT_SYMBOL_GPL(nfs_alloc_fhandle
);
1385 * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
1386 * in the same way that wireshark does
1390 * For debugging only.
1392 u32
_nfs_display_fhandle_hash(const struct nfs_fh
*fh
)
1394 /* wireshark uses 32-bit AUTODIN crc and does a bitwise
1395 * not on the result */
1396 return nfs_fhandle_hash(fh
);
1398 EXPORT_SYMBOL_GPL(_nfs_display_fhandle_hash
);
1401 * _nfs_display_fhandle - display an NFS file handle on the console
1403 * @fh: file handle to display
1404 * @caption: display caption
1406 * For debugging only.
1408 void _nfs_display_fhandle(const struct nfs_fh
*fh
, const char *caption
)
1412 if (fh
== NULL
|| fh
->size
== 0) {
1413 printk(KERN_DEFAULT
"%s at %p is empty\n", caption
, fh
);
1417 printk(KERN_DEFAULT
"%s at %p is %u bytes, crc: 0x%08x:\n",
1418 caption
, fh
, fh
->size
, _nfs_display_fhandle_hash(fh
));
1419 for (i
= 0; i
< fh
->size
; i
+= 16) {
1420 __be32
*pos
= (__be32
*)&fh
->data
[i
];
1422 switch ((fh
->size
- i
- 1) >> 2) {
1424 printk(KERN_DEFAULT
" %08x\n",
1428 printk(KERN_DEFAULT
" %08x %08x\n",
1429 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1));
1432 printk(KERN_DEFAULT
" %08x %08x %08x\n",
1433 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1434 be32_to_cpup(pos
+ 2));
1437 printk(KERN_DEFAULT
" %08x %08x %08x %08x\n",
1438 be32_to_cpup(pos
), be32_to_cpup(pos
+ 1),
1439 be32_to_cpup(pos
+ 2), be32_to_cpup(pos
+ 3));
1443 EXPORT_SYMBOL_GPL(_nfs_display_fhandle
);
1447 * nfs_inode_attrs_need_update - check if the inode attributes need updating
1448 * @inode - pointer to inode
1449 * @fattr - attributes
1451 * Attempt to divine whether or not an RPC call reply carrying stale
1452 * attributes got scheduled after another call carrying updated ones.
1454 * To do so, the function first assumes that a more recent ctime means
1455 * that the attributes in fattr are newer, however it also attempt to
1456 * catch the case where ctime either didn't change, or went backwards
1457 * (if someone reset the clock on the server) by looking at whether
1458 * or not this RPC call was started after the inode was last updated.
1459 * Note also the check for wraparound of 'attr_gencount'
1461 * The function returns 'true' if it thinks the attributes in 'fattr' are
1462 * more recent than the ones cached in the inode.
1465 static int nfs_inode_attrs_need_update(const struct inode
*inode
, const struct nfs_fattr
*fattr
)
1467 const struct nfs_inode
*nfsi
= NFS_I(inode
);
1469 return ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
) > 0 ||
1470 ((long)nfsi
->attr_gencount
- (long)nfs_read_attr_generation_counter() > 0);
1474 * Don't trust the change_attribute, mtime, ctime or size if
1475 * a pnfs LAYOUTCOMMIT is outstanding
1477 static void nfs_inode_attrs_handle_layoutcommit(struct inode
*inode
,
1478 struct nfs_fattr
*fattr
)
1480 if (pnfs_layoutcommit_outstanding(inode
))
1481 fattr
->valid
&= ~(NFS_ATTR_FATTR_CHANGE
|
1482 NFS_ATTR_FATTR_MTIME
|
1483 NFS_ATTR_FATTR_CTIME
|
1484 NFS_ATTR_FATTR_SIZE
);
1487 static int nfs_refresh_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1491 trace_nfs_refresh_inode_enter(inode
);
1493 nfs_inode_attrs_handle_layoutcommit(inode
, fattr
);
1495 if (nfs_inode_attrs_need_update(inode
, fattr
))
1496 ret
= nfs_update_inode(inode
, fattr
);
1498 ret
= nfs_check_inode_attributes(inode
, fattr
);
1500 trace_nfs_refresh_inode_exit(inode
, ret
);
1505 * nfs_refresh_inode - try to update the inode attribute cache
1506 * @inode - pointer to inode
1507 * @fattr - updated attributes
1509 * Check that an RPC call that returned attributes has not overlapped with
1510 * other recent updates of the inode metadata, then decide whether it is
1511 * safe to do a full update of the inode attributes, or whether just to
1512 * call nfs_check_inode_attributes.
1514 int nfs_refresh_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1518 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1520 spin_lock(&inode
->i_lock
);
1521 status
= nfs_refresh_inode_locked(inode
, fattr
);
1522 spin_unlock(&inode
->i_lock
);
1526 EXPORT_SYMBOL_GPL(nfs_refresh_inode
);
1528 static int nfs_post_op_update_inode_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1530 unsigned long invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
;
1533 * Don't revalidate the pagecache if we hold a delegation, but do
1534 * force an attribute update
1536 if (NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
))
1537 invalid
= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_FORCED
;
1539 if (S_ISDIR(inode
->i_mode
))
1540 invalid
|= NFS_INO_INVALID_DATA
;
1541 nfs_set_cache_invalid(inode
, invalid
);
1542 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0)
1544 return nfs_refresh_inode_locked(inode
, fattr
);
1548 * nfs_post_op_update_inode - try to update the inode attribute cache
1549 * @inode - pointer to inode
1550 * @fattr - updated attributes
1552 * After an operation that has changed the inode metadata, mark the
1553 * attribute cache as being invalid, then try to update it.
1555 * NB: if the server didn't return any post op attributes, this
1556 * function will force the retrieval of attributes before the next
1557 * NFS request. Thus it should be used only for operations that
1558 * are expected to change one or more attributes, to avoid
1559 * unnecessary NFS requests and trips through nfs_update_inode().
1561 int nfs_post_op_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1565 spin_lock(&inode
->i_lock
);
1566 nfs_fattr_set_barrier(fattr
);
1567 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1568 spin_unlock(&inode
->i_lock
);
1572 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode
);
1575 * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
1576 * @inode - pointer to inode
1577 * @fattr - updated attributes
1579 * After an operation that has changed the inode metadata, mark the
1580 * attribute cache as being invalid, then try to update it. Fake up
1581 * weak cache consistency data, if none exist.
1583 * This function is mainly designed to be used by the ->write_done() functions.
1585 int nfs_post_op_update_inode_force_wcc_locked(struct inode
*inode
, struct nfs_fattr
*fattr
)
1589 /* Don't do a WCC update if these attributes are already stale */
1590 if ((fattr
->valid
& NFS_ATTR_FATTR
) == 0 ||
1591 !nfs_inode_attrs_need_update(inode
, fattr
)) {
1592 fattr
->valid
&= ~(NFS_ATTR_FATTR_PRECHANGE
1593 | NFS_ATTR_FATTR_PRESIZE
1594 | NFS_ATTR_FATTR_PREMTIME
1595 | NFS_ATTR_FATTR_PRECTIME
);
1598 if ((fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) != 0 &&
1599 (fattr
->valid
& NFS_ATTR_FATTR_PRECHANGE
) == 0) {
1600 fattr
->pre_change_attr
= inode
->i_version
;
1601 fattr
->valid
|= NFS_ATTR_FATTR_PRECHANGE
;
1603 if ((fattr
->valid
& NFS_ATTR_FATTR_CTIME
) != 0 &&
1604 (fattr
->valid
& NFS_ATTR_FATTR_PRECTIME
) == 0) {
1605 memcpy(&fattr
->pre_ctime
, &inode
->i_ctime
, sizeof(fattr
->pre_ctime
));
1606 fattr
->valid
|= NFS_ATTR_FATTR_PRECTIME
;
1608 if ((fattr
->valid
& NFS_ATTR_FATTR_MTIME
) != 0 &&
1609 (fattr
->valid
& NFS_ATTR_FATTR_PREMTIME
) == 0) {
1610 memcpy(&fattr
->pre_mtime
, &inode
->i_mtime
, sizeof(fattr
->pre_mtime
));
1611 fattr
->valid
|= NFS_ATTR_FATTR_PREMTIME
;
1613 if ((fattr
->valid
& NFS_ATTR_FATTR_SIZE
) != 0 &&
1614 (fattr
->valid
& NFS_ATTR_FATTR_PRESIZE
) == 0) {
1615 fattr
->pre_size
= i_size_read(inode
);
1616 fattr
->valid
|= NFS_ATTR_FATTR_PRESIZE
;
1619 status
= nfs_post_op_update_inode_locked(inode
, fattr
);
1624 * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
1625 * @inode - pointer to inode
1626 * @fattr - updated attributes
1628 * After an operation that has changed the inode metadata, mark the
1629 * attribute cache as being invalid, then try to update it. Fake up
1630 * weak cache consistency data, if none exist.
1632 * This function is mainly designed to be used by the ->write_done() functions.
1634 int nfs_post_op_update_inode_force_wcc(struct inode
*inode
, struct nfs_fattr
*fattr
)
1638 spin_lock(&inode
->i_lock
);
1639 nfs_fattr_set_barrier(fattr
);
1640 status
= nfs_post_op_update_inode_force_wcc_locked(inode
, fattr
);
1641 spin_unlock(&inode
->i_lock
);
1644 EXPORT_SYMBOL_GPL(nfs_post_op_update_inode_force_wcc
);
1647 static inline bool nfs_fileid_valid(struct nfs_inode
*nfsi
,
1648 struct nfs_fattr
*fattr
)
1650 bool ret1
= true, ret2
= true;
1652 if (fattr
->valid
& NFS_ATTR_FATTR_FILEID
)
1653 ret1
= (nfsi
->fileid
== fattr
->fileid
);
1654 if (fattr
->valid
& NFS_ATTR_FATTR_MOUNTED_ON_FILEID
)
1655 ret2
= (nfsi
->fileid
== fattr
->mounted_on_fileid
);
1656 return ret1
|| ret2
;
1660 * Many nfs protocol calls return the new file attributes after
1661 * an operation. Here we update the inode to reflect the state
1662 * of the server's inode.
1664 * This is a bit tricky because we have to make sure all dirty pages
1665 * have been sent off to the server before calling invalidate_inode_pages.
1666 * To make sure no other process adds more write requests while we try
1667 * our best to flush them, we make them sleep during the attribute refresh.
1669 * A very similar scenario holds for the dir cache.
1671 static int nfs_update_inode(struct inode
*inode
, struct nfs_fattr
*fattr
)
1673 struct nfs_server
*server
;
1674 struct nfs_inode
*nfsi
= NFS_I(inode
);
1675 loff_t cur_isize
, new_isize
;
1676 unsigned long invalid
= 0;
1677 unsigned long now
= jiffies
;
1678 unsigned long save_cache_validity
;
1679 bool cache_revalidated
= true;
1681 dfprintk(VFS
, "NFS: %s(%s/%lu fh_crc=0x%08x ct=%d info=0x%x)\n",
1682 __func__
, inode
->i_sb
->s_id
, inode
->i_ino
,
1683 nfs_display_fhandle_hash(NFS_FH(inode
)),
1684 atomic_read(&inode
->i_count
), fattr
->valid
);
1686 if (!nfs_fileid_valid(nfsi
, fattr
)) {
1687 printk(KERN_ERR
"NFS: server %s error: fileid changed\n"
1688 "fsid %s: expected fileid 0x%Lx, got 0x%Lx\n",
1689 NFS_SERVER(inode
)->nfs_client
->cl_hostname
,
1690 inode
->i_sb
->s_id
, (long long)nfsi
->fileid
,
1691 (long long)fattr
->fileid
);
1696 * Make sure the inode's type hasn't changed.
1698 if ((fattr
->valid
& NFS_ATTR_FATTR_TYPE
) && (inode
->i_mode
& S_IFMT
) != (fattr
->mode
& S_IFMT
)) {
1700 * Big trouble! The inode has become a different object.
1702 printk(KERN_DEBUG
"NFS: %s: inode %lu mode changed, %07o to %07o\n",
1703 __func__
, inode
->i_ino
, inode
->i_mode
, fattr
->mode
);
1707 server
= NFS_SERVER(inode
);
1708 /* Update the fsid? */
1709 if (S_ISDIR(inode
->i_mode
) && (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
1710 !nfs_fsid_equal(&server
->fsid
, &fattr
->fsid
) &&
1711 !IS_AUTOMOUNT(inode
))
1712 server
->fsid
= fattr
->fsid
;
1715 * Update the read time so we don't revalidate too often.
1717 nfsi
->read_cache_jiffies
= fattr
->time_start
;
1719 save_cache_validity
= nfsi
->cache_validity
;
1720 nfsi
->cache_validity
&= ~(NFS_INO_INVALID_ATTR
1721 | NFS_INO_INVALID_ATIME
1722 | NFS_INO_REVAL_FORCED
1723 | NFS_INO_REVAL_PAGECACHE
);
1725 /* Do atomic weak cache consistency updates */
1726 invalid
|= nfs_wcc_update_inode(inode
, fattr
);
1728 /* More cache consistency checks */
1729 if (fattr
->valid
& NFS_ATTR_FATTR_CHANGE
) {
1730 if (inode
->i_version
!= fattr
->change_attr
) {
1731 dprintk("NFS: change_attr change on server for file %s/%ld\n",
1732 inode
->i_sb
->s_id
, inode
->i_ino
);
1733 invalid
|= NFS_INO_INVALID_ATTR
1734 | NFS_INO_INVALID_DATA
1735 | NFS_INO_INVALID_ACCESS
1736 | NFS_INO_INVALID_ACL
;
1737 if (S_ISDIR(inode
->i_mode
))
1738 nfs_force_lookup_revalidate(inode
);
1739 inode
->i_version
= fattr
->change_attr
;
1742 nfsi
->cache_validity
|= save_cache_validity
;
1743 cache_revalidated
= false;
1746 if (fattr
->valid
& NFS_ATTR_FATTR_MTIME
) {
1747 memcpy(&inode
->i_mtime
, &fattr
->mtime
, sizeof(inode
->i_mtime
));
1748 } else if (server
->caps
& NFS_CAP_MTIME
) {
1749 nfsi
->cache_validity
|= save_cache_validity
&
1750 (NFS_INO_INVALID_ATTR
1751 | NFS_INO_REVAL_FORCED
);
1752 cache_revalidated
= false;
1755 if (fattr
->valid
& NFS_ATTR_FATTR_CTIME
) {
1756 memcpy(&inode
->i_ctime
, &fattr
->ctime
, sizeof(inode
->i_ctime
));
1757 } else if (server
->caps
& NFS_CAP_CTIME
) {
1758 nfsi
->cache_validity
|= save_cache_validity
&
1759 (NFS_INO_INVALID_ATTR
1760 | NFS_INO_REVAL_FORCED
);
1761 cache_revalidated
= false;
1764 /* Check if our cached file size is stale */
1765 if (fattr
->valid
& NFS_ATTR_FATTR_SIZE
) {
1766 new_isize
= nfs_size_to_loff_t(fattr
->size
);
1767 cur_isize
= i_size_read(inode
);
1768 if (new_isize
!= cur_isize
) {
1769 /* Do we perhaps have any outstanding writes, or has
1770 * the file grown beyond our last write? */
1771 if ((nfsi
->nrequests
== 0) || new_isize
> cur_isize
) {
1772 i_size_write(inode
, new_isize
);
1773 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_DATA
;
1775 dprintk("NFS: isize change on server for file %s/%ld "
1779 (long long)cur_isize
,
1780 (long long)new_isize
);
1783 nfsi
->cache_validity
|= save_cache_validity
&
1784 (NFS_INO_INVALID_ATTR
1785 | NFS_INO_REVAL_PAGECACHE
1786 | NFS_INO_REVAL_FORCED
);
1787 cache_revalidated
= false;
1791 if (fattr
->valid
& NFS_ATTR_FATTR_ATIME
)
1792 memcpy(&inode
->i_atime
, &fattr
->atime
, sizeof(inode
->i_atime
));
1793 else if (server
->caps
& NFS_CAP_ATIME
) {
1794 nfsi
->cache_validity
|= save_cache_validity
&
1795 (NFS_INO_INVALID_ATIME
1796 | NFS_INO_REVAL_FORCED
);
1797 cache_revalidated
= false;
1800 if (fattr
->valid
& NFS_ATTR_FATTR_MODE
) {
1801 if ((inode
->i_mode
& S_IALLUGO
) != (fattr
->mode
& S_IALLUGO
)) {
1802 umode_t newmode
= inode
->i_mode
& S_IFMT
;
1803 newmode
|= fattr
->mode
& S_IALLUGO
;
1804 inode
->i_mode
= newmode
;
1805 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1807 } else if (server
->caps
& NFS_CAP_MODE
) {
1808 nfsi
->cache_validity
|= save_cache_validity
&
1809 (NFS_INO_INVALID_ATTR
1810 | NFS_INO_INVALID_ACCESS
1811 | NFS_INO_INVALID_ACL
1812 | NFS_INO_REVAL_FORCED
);
1813 cache_revalidated
= false;
1816 if (fattr
->valid
& NFS_ATTR_FATTR_OWNER
) {
1817 if (!uid_eq(inode
->i_uid
, fattr
->uid
)) {
1818 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1819 inode
->i_uid
= fattr
->uid
;
1821 } else if (server
->caps
& NFS_CAP_OWNER
) {
1822 nfsi
->cache_validity
|= save_cache_validity
&
1823 (NFS_INO_INVALID_ATTR
1824 | NFS_INO_INVALID_ACCESS
1825 | NFS_INO_INVALID_ACL
1826 | NFS_INO_REVAL_FORCED
);
1827 cache_revalidated
= false;
1830 if (fattr
->valid
& NFS_ATTR_FATTR_GROUP
) {
1831 if (!gid_eq(inode
->i_gid
, fattr
->gid
)) {
1832 invalid
|= NFS_INO_INVALID_ATTR
|NFS_INO_INVALID_ACCESS
|NFS_INO_INVALID_ACL
;
1833 inode
->i_gid
= fattr
->gid
;
1835 } else if (server
->caps
& NFS_CAP_OWNER_GROUP
) {
1836 nfsi
->cache_validity
|= save_cache_validity
&
1837 (NFS_INO_INVALID_ATTR
1838 | NFS_INO_INVALID_ACCESS
1839 | NFS_INO_INVALID_ACL
1840 | NFS_INO_REVAL_FORCED
);
1841 cache_revalidated
= false;
1844 if (fattr
->valid
& NFS_ATTR_FATTR_NLINK
) {
1845 if (inode
->i_nlink
!= fattr
->nlink
) {
1846 invalid
|= NFS_INO_INVALID_ATTR
;
1847 if (S_ISDIR(inode
->i_mode
))
1848 invalid
|= NFS_INO_INVALID_DATA
;
1849 set_nlink(inode
, fattr
->nlink
);
1851 } else if (server
->caps
& NFS_CAP_NLINK
) {
1852 nfsi
->cache_validity
|= save_cache_validity
&
1853 (NFS_INO_INVALID_ATTR
1854 | NFS_INO_REVAL_FORCED
);
1855 cache_revalidated
= false;
1858 if (fattr
->valid
& NFS_ATTR_FATTR_SPACE_USED
) {
1860 * report the blocks in 512byte units
1862 inode
->i_blocks
= nfs_calc_block_size(fattr
->du
.nfs3
.used
);
1863 } else if (fattr
->valid
& NFS_ATTR_FATTR_BLOCKS_USED
)
1864 inode
->i_blocks
= fattr
->du
.nfs2
.blocks
;
1866 cache_revalidated
= false;
1868 /* Update attrtimeo value if we're out of the unstable period */
1869 if (invalid
& NFS_INO_INVALID_ATTR
) {
1870 nfs_inc_stats(inode
, NFSIOS_ATTRINVALIDATE
);
1871 nfsi
->attrtimeo
= NFS_MINATTRTIMEO(inode
);
1872 nfsi
->attrtimeo_timestamp
= now
;
1873 /* Set barrier to be more recent than all outstanding updates */
1874 nfsi
->attr_gencount
= nfs_inc_attr_generation_counter();
1876 if (cache_revalidated
) {
1877 if (!time_in_range_open(now
, nfsi
->attrtimeo_timestamp
,
1878 nfsi
->attrtimeo_timestamp
+ nfsi
->attrtimeo
)) {
1879 nfsi
->attrtimeo
<<= 1;
1880 if (nfsi
->attrtimeo
> NFS_MAXATTRTIMEO(inode
))
1881 nfsi
->attrtimeo
= NFS_MAXATTRTIMEO(inode
);
1883 nfsi
->attrtimeo_timestamp
= now
;
1885 /* Set the barrier to be more recent than this fattr */
1886 if ((long)fattr
->gencount
- (long)nfsi
->attr_gencount
> 0)
1887 nfsi
->attr_gencount
= fattr
->gencount
;
1890 /* Don't declare attrcache up to date if there were no attrs! */
1891 if (cache_revalidated
)
1892 invalid
&= ~NFS_INO_INVALID_ATTR
;
1894 /* Don't invalidate the data if we were to blame */
1895 if (!(S_ISREG(inode
->i_mode
) || S_ISDIR(inode
->i_mode
)
1896 || S_ISLNK(inode
->i_mode
)))
1897 invalid
&= ~NFS_INO_INVALID_DATA
;
1898 if (!NFS_PROTO(inode
)->have_delegation(inode
, FMODE_READ
) ||
1899 (save_cache_validity
& NFS_INO_REVAL_FORCED
))
1900 nfs_set_cache_invalid(inode
, invalid
);
1905 * No need to worry about unhashing the dentry, as the
1906 * lookup validation will know that the inode is bad.
1907 * (But we fall through to invalidate the caches.)
1909 nfs_invalidate_inode(inode
);
1913 struct inode
*nfs_alloc_inode(struct super_block
*sb
)
1915 struct nfs_inode
*nfsi
;
1916 nfsi
= kmem_cache_alloc(nfs_inode_cachep
, GFP_KERNEL
);
1920 nfsi
->cache_validity
= 0UL;
1921 #if IS_ENABLED(CONFIG_NFS_V4)
1922 nfsi
->nfs4_acl
= NULL
;
1923 #endif /* CONFIG_NFS_V4 */
1924 return &nfsi
->vfs_inode
;
1926 EXPORT_SYMBOL_GPL(nfs_alloc_inode
);
1928 static void nfs_i_callback(struct rcu_head
*head
)
1930 struct inode
*inode
= container_of(head
, struct inode
, i_rcu
);
1931 kmem_cache_free(nfs_inode_cachep
, NFS_I(inode
));
1934 void nfs_destroy_inode(struct inode
*inode
)
1936 call_rcu(&inode
->i_rcu
, nfs_i_callback
);
1938 EXPORT_SYMBOL_GPL(nfs_destroy_inode
);
1940 static inline void nfs4_init_once(struct nfs_inode
*nfsi
)
1942 #if IS_ENABLED(CONFIG_NFS_V4)
1943 INIT_LIST_HEAD(&nfsi
->open_states
);
1944 nfsi
->delegation
= NULL
;
1945 init_rwsem(&nfsi
->rwsem
);
1946 nfsi
->layout
= NULL
;
1950 static void init_once(void *foo
)
1952 struct nfs_inode
*nfsi
= (struct nfs_inode
*) foo
;
1954 inode_init_once(&nfsi
->vfs_inode
);
1955 INIT_LIST_HEAD(&nfsi
->open_files
);
1956 INIT_LIST_HEAD(&nfsi
->access_cache_entry_lru
);
1957 INIT_LIST_HEAD(&nfsi
->access_cache_inode_lru
);
1958 INIT_LIST_HEAD(&nfsi
->commit_info
.list
);
1959 nfsi
->nrequests
= 0;
1960 nfsi
->commit_info
.ncommit
= 0;
1961 atomic_set(&nfsi
->commit_info
.rpcs_out
, 0);
1962 init_rwsem(&nfsi
->rmdir_sem
);
1963 nfs4_init_once(nfsi
);
1966 static int __init
nfs_init_inodecache(void)
1968 nfs_inode_cachep
= kmem_cache_create("nfs_inode_cache",
1969 sizeof(struct nfs_inode
),
1970 0, (SLAB_RECLAIM_ACCOUNT
|
1971 SLAB_MEM_SPREAD
|SLAB_ACCOUNT
),
1973 if (nfs_inode_cachep
== NULL
)
1979 static void nfs_destroy_inodecache(void)
1982 * Make sure all delayed rcu free inodes are flushed before we
1986 kmem_cache_destroy(nfs_inode_cachep
);
1989 struct workqueue_struct
*nfsiod_workqueue
;
1990 EXPORT_SYMBOL_GPL(nfsiod_workqueue
);
1993 * start up the nfsiod workqueue
1995 static int nfsiod_start(void)
1997 struct workqueue_struct
*wq
;
1998 dprintk("RPC: creating workqueue nfsiod\n");
1999 wq
= alloc_workqueue("nfsiod", WQ_MEM_RECLAIM
, 0);
2002 nfsiod_workqueue
= wq
;
2007 * Destroy the nfsiod workqueue
2009 static void nfsiod_stop(void)
2011 struct workqueue_struct
*wq
;
2013 wq
= nfsiod_workqueue
;
2016 nfsiod_workqueue
= NULL
;
2017 destroy_workqueue(wq
);
2021 EXPORT_SYMBOL_GPL(nfs_net_id
);
2023 static int nfs_net_init(struct net
*net
)
2025 nfs_clients_init(net
);
2026 return nfs_fs_proc_net_init(net
);
2029 static void nfs_net_exit(struct net
*net
)
2031 nfs_fs_proc_net_exit(net
);
2032 nfs_cleanup_cb_ident_idr(net
);
2035 static struct pernet_operations nfs_net_ops
= {
2036 .init
= nfs_net_init
,
2037 .exit
= nfs_net_exit
,
2039 .size
= sizeof(struct nfs_net
),
2045 static int __init
init_nfs_fs(void)
2049 err
= register_pernet_subsys(&nfs_net_ops
);
2053 err
= nfs_fscache_register();
2057 err
= nfsiod_start();
2061 err
= nfs_fs_proc_init();
2065 err
= nfs_init_nfspagecache();
2069 err
= nfs_init_inodecache();
2073 err
= nfs_init_readpagecache();
2077 err
= nfs_init_writepagecache();
2081 err
= nfs_init_directcache();
2085 rpc_proc_register(&init_net
, &nfs_rpcstat
);
2087 err
= register_nfs_fs();
2093 rpc_proc_unregister(&init_net
, "nfs");
2094 nfs_destroy_directcache();
2096 nfs_destroy_writepagecache();
2098 nfs_destroy_readpagecache();
2100 nfs_destroy_inodecache();
2102 nfs_destroy_nfspagecache();
2108 nfs_fscache_unregister();
2110 unregister_pernet_subsys(&nfs_net_ops
);
2115 static void __exit
exit_nfs_fs(void)
2117 nfs_destroy_directcache();
2118 nfs_destroy_writepagecache();
2119 nfs_destroy_readpagecache();
2120 nfs_destroy_inodecache();
2121 nfs_destroy_nfspagecache();
2122 nfs_fscache_unregister();
2123 unregister_pernet_subsys(&nfs_net_ops
);
2124 rpc_proc_unregister(&init_net
, "nfs");
2125 unregister_nfs_fs();
2130 /* Not quite true; I just maintain it */
2131 MODULE_AUTHOR("Olaf Kirch <okir@monad.swb.de>");
2132 MODULE_LICENSE("GPL");
2133 module_param(enable_ino64
, bool, 0644);
2135 module_init(init_nfs_fs
)
2136 module_exit(exit_nfs_fs
)