4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2013 by Delphix. All rights reserved.
26 /* Portions Copyright 2010 Robert Milkowski */
28 #include <sys/types.h>
29 #include <sys/param.h>
30 #include <sys/systm.h>
31 #include <sys/sysmacros.h>
33 #include <sys/pathname.h>
34 #include <sys/vnode.h>
36 #include <sys/vfs_opreg.h>
37 #include <sys/mntent.h>
38 #include <sys/mount.h>
39 #include <sys/cmn_err.h>
40 #include "fs/fs_subr.h"
41 #include <sys/zfs_znode.h>
42 #include <sys/zfs_vnops.h>
43 #include <sys/zfs_dir.h>
45 #include <sys/fs/zfs.h>
47 #include <sys/dsl_prop.h>
48 #include <sys/dsl_dataset.h>
49 #include <sys/dsl_deleg.h>
53 #include <sys/sa_impl.h>
54 #include <sys/varargs.h>
55 #include <sys/policy.h>
56 #include <sys/atomic.h>
57 #include <sys/mkdev.h>
58 #include <sys/modctl.h>
59 #include <sys/refstr.h>
60 #include <sys/zfs_ioctl.h>
61 #include <sys/zfs_ctldir.h>
62 #include <sys/zfs_fuid.h>
63 #include <sys/bootconf.h>
64 #include <sys/sunddi.h>
66 #include <sys/dmu_objset.h>
67 #include <sys/spa_boot.h>
69 #include "zfs_comutil.h"
74 zfs_sync(struct super_block
*sb
, int wait
, cred_t
*cr
)
76 zfs_sb_t
*zsb
= sb
->s_fs_info
;
79 * Data integrity is job one. We don't want a compromised kernel
80 * writing to the storage pool, so we never sync during panic.
82 if (unlikely(oops_in_progress
))
86 * Semantically, the only requirement is that the sync be initiated.
87 * The DMU syncs out txgs frequently, so there's nothing to do.
94 * Sync a specific filesystem.
99 dp
= dmu_objset_pool(zsb
->z_os
);
102 * If the system is shutting down, then skip any
103 * filesystems which may exist on a suspended pool.
105 if (spa_suspended(dp
->dp_spa
)) {
110 if (zsb
->z_log
!= NULL
)
111 zil_commit(zsb
->z_log
, 0);
116 * Sync all ZFS filesystems. This is what happens when you
117 * run sync(1M). Unlike other filesystems, ZFS honors the
118 * request by waiting for all pools to commit all dirty data.
125 EXPORT_SYMBOL(zfs_sync
);
128 zfs_is_readonly(zfs_sb_t
*zsb
)
130 return (!!(zsb
->z_sb
->s_flags
& MS_RDONLY
));
132 EXPORT_SYMBOL(zfs_is_readonly
);
135 atime_changed_cb(void *arg
, uint64_t newval
)
137 ((zfs_sb_t
*)arg
)->z_atime
= newval
;
141 relatime_changed_cb(void *arg
, uint64_t newval
)
143 ((zfs_sb_t
*)arg
)->z_relatime
= newval
;
147 xattr_changed_cb(void *arg
, uint64_t newval
)
151 if (newval
== ZFS_XATTR_OFF
) {
152 zsb
->z_flags
&= ~ZSB_XATTR
;
154 zsb
->z_flags
|= ZSB_XATTR
;
156 if (newval
== ZFS_XATTR_SA
)
157 zsb
->z_xattr_sa
= B_TRUE
;
159 zsb
->z_xattr_sa
= B_FALSE
;
164 acltype_changed_cb(void *arg
, uint64_t newval
)
169 case ZFS_ACLTYPE_OFF
:
170 zsb
->z_acl_type
= ZFS_ACLTYPE_OFF
;
171 zsb
->z_sb
->s_flags
&= ~MS_POSIXACL
;
173 case ZFS_ACLTYPE_POSIXACL
:
174 #ifdef CONFIG_FS_POSIX_ACL
175 zsb
->z_acl_type
= ZFS_ACLTYPE_POSIXACL
;
176 zsb
->z_sb
->s_flags
|= MS_POSIXACL
;
178 zsb
->z_acl_type
= ZFS_ACLTYPE_OFF
;
179 zsb
->z_sb
->s_flags
&= ~MS_POSIXACL
;
180 #endif /* CONFIG_FS_POSIX_ACL */
188 blksz_changed_cb(void *arg
, uint64_t newval
)
191 ASSERT3U(newval
, <=, spa_maxblocksize(dmu_objset_spa(zsb
->z_os
)));
192 ASSERT3U(newval
, >=, SPA_MINBLOCKSIZE
);
193 ASSERT(ISP2(newval
));
195 zsb
->z_max_blksz
= newval
;
199 readonly_changed_cb(void *arg
, uint64_t newval
)
202 struct super_block
*sb
= zsb
->z_sb
;
208 sb
->s_flags
|= MS_RDONLY
;
210 sb
->s_flags
&= ~MS_RDONLY
;
214 devices_changed_cb(void *arg
, uint64_t newval
)
219 setuid_changed_cb(void *arg
, uint64_t newval
)
224 exec_changed_cb(void *arg
, uint64_t newval
)
229 nbmand_changed_cb(void *arg
, uint64_t newval
)
232 struct super_block
*sb
= zsb
->z_sb
;
238 sb
->s_flags
|= MS_MANDLOCK
;
240 sb
->s_flags
&= ~MS_MANDLOCK
;
244 snapdir_changed_cb(void *arg
, uint64_t newval
)
246 ((zfs_sb_t
*)arg
)->z_show_ctldir
= newval
;
250 vscan_changed_cb(void *arg
, uint64_t newval
)
252 ((zfs_sb_t
*)arg
)->z_vscan
= newval
;
256 acl_inherit_changed_cb(void *arg
, uint64_t newval
)
258 ((zfs_sb_t
*)arg
)->z_acl_inherit
= newval
;
262 zfs_register_callbacks(zfs_sb_t
*zsb
)
264 struct dsl_dataset
*ds
= NULL
;
265 objset_t
*os
= zsb
->z_os
;
266 boolean_t do_readonly
= B_FALSE
;
269 if (zfs_is_readonly(zsb
) || !spa_writeable(dmu_objset_spa(os
)))
270 do_readonly
= B_TRUE
;
273 * Register property callbacks.
275 * It would probably be fine to just check for i/o error from
276 * the first prop_register(), but I guess I like to go
279 ds
= dmu_objset_ds(os
);
280 dsl_pool_config_enter(dmu_objset_pool(os
), FTAG
);
281 error
= dsl_prop_register(ds
,
282 zfs_prop_to_name(ZFS_PROP_ATIME
), atime_changed_cb
, zsb
);
283 error
= error
? error
: dsl_prop_register(ds
,
284 zfs_prop_to_name(ZFS_PROP_RELATIME
), relatime_changed_cb
, zsb
);
285 error
= error
? error
: dsl_prop_register(ds
,
286 zfs_prop_to_name(ZFS_PROP_XATTR
), xattr_changed_cb
, zsb
);
287 error
= error
? error
: dsl_prop_register(ds
,
288 zfs_prop_to_name(ZFS_PROP_RECORDSIZE
), blksz_changed_cb
, zsb
);
289 error
= error
? error
: dsl_prop_register(ds
,
290 zfs_prop_to_name(ZFS_PROP_READONLY
), readonly_changed_cb
, zsb
);
291 error
= error
? error
: dsl_prop_register(ds
,
292 zfs_prop_to_name(ZFS_PROP_DEVICES
), devices_changed_cb
, zsb
);
293 error
= error
? error
: dsl_prop_register(ds
,
294 zfs_prop_to_name(ZFS_PROP_SETUID
), setuid_changed_cb
, zsb
);
295 error
= error
? error
: dsl_prop_register(ds
,
296 zfs_prop_to_name(ZFS_PROP_EXEC
), exec_changed_cb
, zsb
);
297 error
= error
? error
: dsl_prop_register(ds
,
298 zfs_prop_to_name(ZFS_PROP_SNAPDIR
), snapdir_changed_cb
, zsb
);
299 error
= error
? error
: dsl_prop_register(ds
,
300 zfs_prop_to_name(ZFS_PROP_ACLTYPE
), acltype_changed_cb
, zsb
);
301 error
= error
? error
: dsl_prop_register(ds
,
302 zfs_prop_to_name(ZFS_PROP_ACLINHERIT
), acl_inherit_changed_cb
, zsb
);
303 error
= error
? error
: dsl_prop_register(ds
,
304 zfs_prop_to_name(ZFS_PROP_VSCAN
), vscan_changed_cb
, zsb
);
305 error
= error
? error
: dsl_prop_register(ds
,
306 zfs_prop_to_name(ZFS_PROP_NBMAND
), nbmand_changed_cb
, zsb
);
307 dsl_pool_config_exit(dmu_objset_pool(os
), FTAG
);
312 readonly_changed_cb(zsb
, B_TRUE
);
318 * We may attempt to unregister some callbacks that are not
319 * registered, but this is OK; it will simply return ENOMSG,
320 * which we will ignore.
322 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_ATIME
),
323 atime_changed_cb
, zsb
);
324 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_RELATIME
),
325 relatime_changed_cb
, zsb
);
326 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_XATTR
),
327 xattr_changed_cb
, zsb
);
328 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_RECORDSIZE
),
329 blksz_changed_cb
, zsb
);
330 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_READONLY
),
331 readonly_changed_cb
, zsb
);
332 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_DEVICES
),
333 devices_changed_cb
, zsb
);
334 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_SETUID
),
335 setuid_changed_cb
, zsb
);
336 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_EXEC
),
337 exec_changed_cb
, zsb
);
338 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_SNAPDIR
),
339 snapdir_changed_cb
, zsb
);
340 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_ACLTYPE
),
341 acltype_changed_cb
, zsb
);
342 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_ACLINHERIT
),
343 acl_inherit_changed_cb
, zsb
);
344 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_VSCAN
),
345 vscan_changed_cb
, zsb
);
346 (void) dsl_prop_unregister(ds
, zfs_prop_to_name(ZFS_PROP_NBMAND
),
347 nbmand_changed_cb
, zsb
);
351 EXPORT_SYMBOL(zfs_register_callbacks
);
354 zfs_space_delta_cb(dmu_object_type_t bonustype
, void *data
,
355 uint64_t *userp
, uint64_t *groupp
)
358 * Is it a valid type of object to track?
360 if (bonustype
!= DMU_OT_ZNODE
&& bonustype
!= DMU_OT_SA
)
361 return (SET_ERROR(ENOENT
));
364 * If we have a NULL data pointer
365 * then assume the id's aren't changing and
366 * return EEXIST to the dmu to let it know to
370 return (SET_ERROR(EEXIST
));
372 if (bonustype
== DMU_OT_ZNODE
) {
373 znode_phys_t
*znp
= data
;
374 *userp
= znp
->zp_uid
;
375 *groupp
= znp
->zp_gid
;
378 sa_hdr_phys_t
*sap
= data
;
379 sa_hdr_phys_t sa
= *sap
;
380 boolean_t swap
= B_FALSE
;
382 ASSERT(bonustype
== DMU_OT_SA
);
384 if (sa
.sa_magic
== 0) {
386 * This should only happen for newly created
387 * files that haven't had the znode data filled
394 if (sa
.sa_magic
== BSWAP_32(SA_MAGIC
)) {
395 sa
.sa_magic
= SA_MAGIC
;
396 sa
.sa_layout_info
= BSWAP_16(sa
.sa_layout_info
);
399 VERIFY3U(sa
.sa_magic
, ==, SA_MAGIC
);
402 hdrsize
= sa_hdrsize(&sa
);
403 VERIFY3U(hdrsize
, >=, sizeof (sa_hdr_phys_t
));
404 *userp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
406 *groupp
= *((uint64_t *)((uintptr_t)data
+ hdrsize
+
409 *userp
= BSWAP_64(*userp
);
410 *groupp
= BSWAP_64(*groupp
);
417 fuidstr_to_sid(zfs_sb_t
*zsb
, const char *fuidstr
,
418 char *domainbuf
, int buflen
, uid_t
*ridp
)
423 fuid
= strtonum(fuidstr
, NULL
);
425 domain
= zfs_fuid_find_by_idx(zsb
, FUID_INDEX(fuid
));
427 (void) strlcpy(domainbuf
, domain
, buflen
);
430 *ridp
= FUID_RID(fuid
);
434 zfs_userquota_prop_to_obj(zfs_sb_t
*zsb
, zfs_userquota_prop_t type
)
437 case ZFS_PROP_USERUSED
:
438 return (DMU_USERUSED_OBJECT
);
439 case ZFS_PROP_GROUPUSED
:
440 return (DMU_GROUPUSED_OBJECT
);
441 case ZFS_PROP_USERQUOTA
:
442 return (zsb
->z_userquota_obj
);
443 case ZFS_PROP_GROUPQUOTA
:
444 return (zsb
->z_groupquota_obj
);
446 return (SET_ERROR(ENOTSUP
));
452 zfs_userspace_many(zfs_sb_t
*zsb
, zfs_userquota_prop_t type
,
453 uint64_t *cookiep
, void *vbuf
, uint64_t *bufsizep
)
458 zfs_useracct_t
*buf
= vbuf
;
461 if (!dmu_objset_userspace_present(zsb
->z_os
))
462 return (SET_ERROR(ENOTSUP
));
464 obj
= zfs_userquota_prop_to_obj(zsb
, type
);
470 for (zap_cursor_init_serialized(&zc
, zsb
->z_os
, obj
, *cookiep
);
471 (error
= zap_cursor_retrieve(&zc
, &za
)) == 0;
472 zap_cursor_advance(&zc
)) {
473 if ((uintptr_t)buf
- (uintptr_t)vbuf
+ sizeof (zfs_useracct_t
) >
477 fuidstr_to_sid(zsb
, za
.za_name
,
478 buf
->zu_domain
, sizeof (buf
->zu_domain
), &buf
->zu_rid
);
480 buf
->zu_space
= za
.za_first_integer
;
486 ASSERT3U((uintptr_t)buf
- (uintptr_t)vbuf
, <=, *bufsizep
);
487 *bufsizep
= (uintptr_t)buf
- (uintptr_t)vbuf
;
488 *cookiep
= zap_cursor_serialize(&zc
);
489 zap_cursor_fini(&zc
);
492 EXPORT_SYMBOL(zfs_userspace_many
);
495 * buf must be big enough (eg, 32 bytes)
498 id_to_fuidstr(zfs_sb_t
*zsb
, const char *domain
, uid_t rid
,
499 char *buf
, boolean_t addok
)
504 if (domain
&& domain
[0]) {
505 domainid
= zfs_fuid_find_by_domain(zsb
, domain
, NULL
, addok
);
507 return (SET_ERROR(ENOENT
));
509 fuid
= FUID_ENCODE(domainid
, rid
);
510 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
515 zfs_userspace_one(zfs_sb_t
*zsb
, zfs_userquota_prop_t type
,
516 const char *domain
, uint64_t rid
, uint64_t *valp
)
524 if (!dmu_objset_userspace_present(zsb
->z_os
))
525 return (SET_ERROR(ENOTSUP
));
527 obj
= zfs_userquota_prop_to_obj(zsb
, type
);
531 err
= id_to_fuidstr(zsb
, domain
, rid
, buf
, B_FALSE
);
535 err
= zap_lookup(zsb
->z_os
, obj
, buf
, 8, 1, valp
);
540 EXPORT_SYMBOL(zfs_userspace_one
);
543 zfs_set_userquota(zfs_sb_t
*zsb
, zfs_userquota_prop_t type
,
544 const char *domain
, uint64_t rid
, uint64_t quota
)
550 boolean_t fuid_dirtied
;
552 if (type
!= ZFS_PROP_USERQUOTA
&& type
!= ZFS_PROP_GROUPQUOTA
)
553 return (SET_ERROR(EINVAL
));
555 if (zsb
->z_version
< ZPL_VERSION_USERSPACE
)
556 return (SET_ERROR(ENOTSUP
));
558 objp
= (type
== ZFS_PROP_USERQUOTA
) ? &zsb
->z_userquota_obj
:
559 &zsb
->z_groupquota_obj
;
561 err
= id_to_fuidstr(zsb
, domain
, rid
, buf
, B_TRUE
);
564 fuid_dirtied
= zsb
->z_fuid_dirty
;
566 tx
= dmu_tx_create(zsb
->z_os
);
567 dmu_tx_hold_zap(tx
, *objp
? *objp
: DMU_NEW_OBJECT
, B_TRUE
, NULL
);
569 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
570 zfs_userquota_prop_prefixes
[type
]);
573 zfs_fuid_txhold(zsb
, tx
);
574 err
= dmu_tx_assign(tx
, TXG_WAIT
);
580 mutex_enter(&zsb
->z_lock
);
582 *objp
= zap_create(zsb
->z_os
, DMU_OT_USERGROUP_QUOTA
,
584 VERIFY(0 == zap_add(zsb
->z_os
, MASTER_NODE_OBJ
,
585 zfs_userquota_prop_prefixes
[type
], 8, 1, objp
, tx
));
587 mutex_exit(&zsb
->z_lock
);
590 err
= zap_remove(zsb
->z_os
, *objp
, buf
, tx
);
594 err
= zap_update(zsb
->z_os
, *objp
, buf
, 8, 1, "a
, tx
);
598 zfs_fuid_sync(zsb
, tx
);
602 EXPORT_SYMBOL(zfs_set_userquota
);
605 zfs_fuid_overquota(zfs_sb_t
*zsb
, boolean_t isgroup
, uint64_t fuid
)
608 uint64_t used
, quota
, usedobj
, quotaobj
;
611 usedobj
= isgroup
? DMU_GROUPUSED_OBJECT
: DMU_USERUSED_OBJECT
;
612 quotaobj
= isgroup
? zsb
->z_groupquota_obj
: zsb
->z_userquota_obj
;
614 if (quotaobj
== 0 || zsb
->z_replay
)
617 (void) sprintf(buf
, "%llx", (longlong_t
)fuid
);
618 err
= zap_lookup(zsb
->z_os
, quotaobj
, buf
, 8, 1, "a
);
622 err
= zap_lookup(zsb
->z_os
, usedobj
, buf
, 8, 1, &used
);
625 return (used
>= quota
);
627 EXPORT_SYMBOL(zfs_fuid_overquota
);
630 zfs_owner_overquota(zfs_sb_t
*zsb
, znode_t
*zp
, boolean_t isgroup
)
635 quotaobj
= isgroup
? zsb
->z_groupquota_obj
: zsb
->z_userquota_obj
;
637 fuid
= isgroup
? zp
->z_gid
: zp
->z_uid
;
639 if (quotaobj
== 0 || zsb
->z_replay
)
642 return (zfs_fuid_overquota(zsb
, isgroup
, fuid
));
644 EXPORT_SYMBOL(zfs_owner_overquota
);
647 zfs_sb_create(const char *osname
, zfs_sb_t
**zsbp
)
655 zsb
= kmem_zalloc(sizeof (zfs_sb_t
), KM_SLEEP
);
658 * We claim to always be readonly so we can open snapshots;
659 * other ZPL code will prevent us from writing to snapshots.
661 error
= dmu_objset_own(osname
, DMU_OST_ZFS
, B_TRUE
, zsb
, &os
);
663 kmem_free(zsb
, sizeof (zfs_sb_t
));
668 * Initialize the zfs-specific filesystem structure.
669 * Should probably make this a kmem cache, shuffle fields,
670 * and just bzero up to z_hold_mtx[].
674 zsb
->z_max_blksz
= SPA_OLD_MAXBLOCKSIZE
;
675 zsb
->z_show_ctldir
= ZFS_SNAPDIR_VISIBLE
;
678 error
= zfs_get_zplprop(os
, ZFS_PROP_VERSION
, &zsb
->z_version
);
681 } else if (zsb
->z_version
> ZPL_VERSION
) {
682 error
= SET_ERROR(ENOTSUP
);
685 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_NORMALIZE
, &zval
)) != 0)
687 zsb
->z_norm
= (int)zval
;
689 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_UTF8ONLY
, &zval
)) != 0)
691 zsb
->z_utf8
= (zval
!= 0);
693 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_CASE
, &zval
)) != 0)
695 zsb
->z_case
= (uint_t
)zval
;
697 if ((error
= zfs_get_zplprop(os
, ZFS_PROP_ACLTYPE
, &zval
)) != 0)
699 zsb
->z_acl_type
= (uint_t
)zval
;
702 * Fold case on file systems that are always or sometimes case
705 if (zsb
->z_case
== ZFS_CASE_INSENSITIVE
||
706 zsb
->z_case
== ZFS_CASE_MIXED
)
707 zsb
->z_norm
|= U8_TEXTPREP_TOUPPER
;
709 zsb
->z_use_fuids
= USE_FUIDS(zsb
->z_version
, zsb
->z_os
);
710 zsb
->z_use_sa
= USE_SA(zsb
->z_version
, zsb
->z_os
);
713 /* should either have both of these objects or none */
714 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SA_ATTRS
, 8, 1,
719 error
= zfs_get_zplprop(os
, ZFS_PROP_XATTR
, &zval
);
720 if ((error
== 0) && (zval
== ZFS_XATTR_SA
))
721 zsb
->z_xattr_sa
= B_TRUE
;
724 * Pre SA versions file systems should never touch
725 * either the attribute registration or layout objects.
730 error
= sa_setup(os
, sa_obj
, zfs_attr_table
, ZPL_END
,
735 if (zsb
->z_version
>= ZPL_VERSION_SA
)
736 sa_register_update_callback(os
, zfs_sa_upgrade
);
738 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_ROOT_OBJ
, 8, 1,
742 ASSERT(zsb
->z_root
!= 0);
744 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_UNLINKED_SET
, 8, 1,
745 &zsb
->z_unlinkedobj
);
749 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
750 zfs_userquota_prop_prefixes
[ZFS_PROP_USERQUOTA
],
751 8, 1, &zsb
->z_userquota_obj
);
752 if (error
&& error
!= ENOENT
)
755 error
= zap_lookup(os
, MASTER_NODE_OBJ
,
756 zfs_userquota_prop_prefixes
[ZFS_PROP_GROUPQUOTA
],
757 8, 1, &zsb
->z_groupquota_obj
);
758 if (error
&& error
!= ENOENT
)
761 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_FUID_TABLES
, 8, 1,
763 if (error
&& error
!= ENOENT
)
766 error
= zap_lookup(os
, MASTER_NODE_OBJ
, ZFS_SHARES_DIR
, 8, 1,
768 if (error
&& error
!= ENOENT
)
771 mutex_init(&zsb
->z_znodes_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
772 mutex_init(&zsb
->z_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
773 list_create(&zsb
->z_all_znodes
, sizeof (znode_t
),
774 offsetof(znode_t
, z_link_node
));
775 rrw_init(&zsb
->z_teardown_lock
, B_FALSE
);
776 rw_init(&zsb
->z_teardown_inactive_lock
, NULL
, RW_DEFAULT
, NULL
);
777 rw_init(&zsb
->z_fuid_lock
, NULL
, RW_DEFAULT
, NULL
);
779 zsb
->z_hold_mtx
= vmem_zalloc(sizeof (kmutex_t
) * ZFS_OBJ_MTX_SZ
,
781 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
782 mutex_init(&zsb
->z_hold_mtx
[i
], NULL
, MUTEX_DEFAULT
, NULL
);
784 avl_create(&zsb
->z_ctldir_snaps
, snapentry_compare
,
785 sizeof (zfs_snapentry_t
), offsetof(zfs_snapentry_t
, se_node
));
786 mutex_init(&zsb
->z_ctldir_lock
, NULL
, MUTEX_DEFAULT
, NULL
);
792 dmu_objset_disown(os
, zsb
);
795 vmem_free(zsb
->z_hold_mtx
, sizeof (kmutex_t
) * ZFS_OBJ_MTX_SZ
);
796 kmem_free(zsb
, sizeof (zfs_sb_t
));
799 EXPORT_SYMBOL(zfs_sb_create
);
802 zfs_sb_setup(zfs_sb_t
*zsb
, boolean_t mounting
)
806 error
= zfs_register_callbacks(zsb
);
811 * Set the objset user_ptr to track its zsb.
813 mutex_enter(&zsb
->z_os
->os_user_ptr_lock
);
814 dmu_objset_set_user(zsb
->z_os
, zsb
);
815 mutex_exit(&zsb
->z_os
->os_user_ptr_lock
);
817 zsb
->z_log
= zil_open(zsb
->z_os
, zfs_get_data
);
820 * If we are not mounting (ie: online recv), then we don't
821 * have to worry about replaying the log as we blocked all
822 * operations out since we closed the ZIL.
828 * During replay we remove the read only flag to
829 * allow replays to succeed.
831 readonly
= zfs_is_readonly(zsb
);
833 readonly_changed_cb(zsb
, B_FALSE
);
835 zfs_unlinked_drain(zsb
);
838 * Parse and replay the intent log.
840 * Because of ziltest, this must be done after
841 * zfs_unlinked_drain(). (Further note: ziltest
842 * doesn't use readonly mounts, where
843 * zfs_unlinked_drain() isn't called.) This is because
844 * ziltest causes spa_sync() to think it's committed,
845 * but actually it is not, so the intent log contains
846 * many txg's worth of changes.
848 * In particular, if object N is in the unlinked set in
849 * the last txg to actually sync, then it could be
850 * actually freed in a later txg and then reallocated
851 * in a yet later txg. This would write a "create
852 * object N" record to the intent log. Normally, this
853 * would be fine because the spa_sync() would have
854 * written out the fact that object N is free, before
855 * we could write the "create object N" intent log
858 * But when we are in ziltest mode, we advance the "open
859 * txg" without actually spa_sync()-ing the changes to
860 * disk. So we would see that object N is still
861 * allocated and in the unlinked set, and there is an
862 * intent log record saying to allocate it.
864 if (spa_writeable(dmu_objset_spa(zsb
->z_os
))) {
865 if (zil_replay_disable
) {
866 zil_destroy(zsb
->z_log
, B_FALSE
);
868 zsb
->z_replay
= B_TRUE
;
869 zil_replay(zsb
->z_os
, zsb
,
871 zsb
->z_replay
= B_FALSE
;
875 /* restore readonly bit */
877 readonly_changed_cb(zsb
, B_TRUE
);
882 EXPORT_SYMBOL(zfs_sb_setup
);
885 zfs_sb_free(zfs_sb_t
*zsb
)
889 zfs_fuid_destroy(zsb
);
891 mutex_destroy(&zsb
->z_znodes_lock
);
892 mutex_destroy(&zsb
->z_lock
);
893 list_destroy(&zsb
->z_all_znodes
);
894 rrw_destroy(&zsb
->z_teardown_lock
);
895 rw_destroy(&zsb
->z_teardown_inactive_lock
);
896 rw_destroy(&zsb
->z_fuid_lock
);
897 for (i
= 0; i
!= ZFS_OBJ_MTX_SZ
; i
++)
898 mutex_destroy(&zsb
->z_hold_mtx
[i
]);
899 vmem_free(zsb
->z_hold_mtx
, sizeof (kmutex_t
) * ZFS_OBJ_MTX_SZ
);
900 mutex_destroy(&zsb
->z_ctldir_lock
);
901 avl_destroy(&zsb
->z_ctldir_snaps
);
902 kmem_free(zsb
, sizeof (zfs_sb_t
));
904 EXPORT_SYMBOL(zfs_sb_free
);
907 zfs_set_fuid_feature(zfs_sb_t
*zsb
)
909 zsb
->z_use_fuids
= USE_FUIDS(zsb
->z_version
, zsb
->z_os
);
910 zsb
->z_use_sa
= USE_SA(zsb
->z_version
, zsb
->z_os
);
914 zfs_unregister_callbacks(zfs_sb_t
*zsb
)
916 objset_t
*os
= zsb
->z_os
;
917 struct dsl_dataset
*ds
;
920 * Unregister properties.
922 if (!dmu_objset_is_snapshot(os
)) {
923 ds
= dmu_objset_ds(os
);
924 VERIFY(dsl_prop_unregister(ds
, "atime", atime_changed_cb
,
927 VERIFY(dsl_prop_unregister(ds
, "relatime", relatime_changed_cb
,
930 VERIFY(dsl_prop_unregister(ds
, "xattr", xattr_changed_cb
,
933 VERIFY(dsl_prop_unregister(ds
, "recordsize", blksz_changed_cb
,
936 VERIFY(dsl_prop_unregister(ds
, "readonly", readonly_changed_cb
,
939 VERIFY(dsl_prop_unregister(ds
, "devices", devices_changed_cb
,
942 VERIFY(dsl_prop_unregister(ds
, "setuid", setuid_changed_cb
,
945 VERIFY(dsl_prop_unregister(ds
, "exec", exec_changed_cb
,
948 VERIFY(dsl_prop_unregister(ds
, "snapdir", snapdir_changed_cb
,
951 VERIFY(dsl_prop_unregister(ds
, "acltype", acltype_changed_cb
,
954 VERIFY(dsl_prop_unregister(ds
, "aclinherit",
955 acl_inherit_changed_cb
, zsb
) == 0);
957 VERIFY(dsl_prop_unregister(ds
, "vscan",
958 vscan_changed_cb
, zsb
) == 0);
960 VERIFY(dsl_prop_unregister(ds
, "nbmand",
961 nbmand_changed_cb
, zsb
) == 0);
964 EXPORT_SYMBOL(zfs_unregister_callbacks
);
968 * Check that the hex label string is appropriate for the dataset being
969 * mounted into the global_zone proper.
971 * Return an error if the hex label string is not default or
972 * admin_low/admin_high. For admin_low labels, the corresponding
973 * dataset must be readonly.
976 zfs_check_global_label(const char *dsname
, const char *hexsl
)
978 if (strcasecmp(hexsl
, ZFS_MLSLABEL_DEFAULT
) == 0)
980 if (strcasecmp(hexsl
, ADMIN_HIGH
) == 0)
982 if (strcasecmp(hexsl
, ADMIN_LOW
) == 0) {
983 /* must be readonly */
986 if (dsl_prop_get_integer(dsname
,
987 zfs_prop_to_name(ZFS_PROP_READONLY
), &rdonly
, NULL
))
988 return (SET_ERROR(EACCES
));
989 return (rdonly
? 0 : EACCES
);
991 return (SET_ERROR(EACCES
));
993 EXPORT_SYMBOL(zfs_check_global_label
);
994 #endif /* HAVE_MLSLABEL */
997 zfs_statvfs(struct dentry
*dentry
, struct kstatfs
*statp
)
999 zfs_sb_t
*zsb
= dentry
->d_sb
->s_fs_info
;
1000 uint64_t refdbytes
, availbytes
, usedobjs
, availobjs
;
1006 dmu_objset_space(zsb
->z_os
,
1007 &refdbytes
, &availbytes
, &usedobjs
, &availobjs
);
1009 fsid
= dmu_objset_fsid_guid(zsb
->z_os
);
1011 * The underlying storage pool actually uses multiple block
1012 * size. Under Solaris frsize (fragment size) is reported as
1013 * the smallest block size we support, and bsize (block size)
1014 * as the filesystem's maximum block size. Unfortunately,
1015 * under Linux the fragment size and block size are often used
1016 * interchangeably. Thus we are forced to report both of them
1017 * as the filesystem's maximum block size.
1019 statp
->f_frsize
= zsb
->z_max_blksz
;
1020 statp
->f_bsize
= zsb
->z_max_blksz
;
1021 bshift
= fls(statp
->f_bsize
) - 1;
1024 * The following report "total" blocks of various kinds in
1025 * the file system, but reported in terms of f_bsize - the
1029 statp
->f_blocks
= (refdbytes
+ availbytes
) >> bshift
;
1030 statp
->f_bfree
= availbytes
>> bshift
;
1031 statp
->f_bavail
= statp
->f_bfree
; /* no root reservation */
1034 * statvfs() should really be called statufs(), because it assumes
1035 * static metadata. ZFS doesn't preallocate files, so the best
1036 * we can do is report the max that could possibly fit in f_files,
1037 * and that minus the number actually used in f_ffree.
1038 * For f_ffree, report the smaller of the number of object available
1039 * and the number of blocks (each object will take at least a block).
1041 statp
->f_ffree
= MIN(availobjs
, availbytes
>> DNODE_SHIFT
);
1042 statp
->f_files
= statp
->f_ffree
+ usedobjs
;
1043 statp
->f_fsid
.val
[0] = (uint32_t)fsid
;
1044 statp
->f_fsid
.val
[1] = (uint32_t)(fsid
>> 32);
1045 statp
->f_type
= ZFS_SUPER_MAGIC
;
1046 statp
->f_namelen
= ZFS_MAXNAMELEN
;
1049 * We have all of 40 characters to stuff a string here.
1050 * Is there anything useful we could/should provide?
1052 bzero(statp
->f_spare
, sizeof (statp
->f_spare
));
1057 EXPORT_SYMBOL(zfs_statvfs
);
1060 zfs_root(zfs_sb_t
*zsb
, struct inode
**ipp
)
1067 error
= zfs_zget(zsb
, zsb
->z_root
, &rootzp
);
1069 *ipp
= ZTOI(rootzp
);
1074 EXPORT_SYMBOL(zfs_root
);
1077 * The ARC has requested that the filesystem drop entries from the dentry
1078 * and inode caches. This can occur when the ARC needs to free meta data
1079 * blocks but can't because they are all pinned by entries in these caches.
1082 zfs_sb_prune(struct super_block
*sb
, unsigned long nr_to_scan
, int *objects
)
1084 zfs_sb_t
*zsb
= sb
->s_fs_info
;
1086 #if defined(HAVE_SHRINK) || defined(HAVE_SPLIT_SHRINKER_CALLBACK)
1087 struct shrinker
*shrinker
= &sb
->s_shrink
;
1088 struct shrink_control sc
= {
1089 .nr_to_scan
= nr_to_scan
,
1090 .gfp_mask
= GFP_KERNEL
,
1096 #if defined(HAVE_SPLIT_SHRINKER_CALLBACK)
1097 *objects
= (*shrinker
->scan_objects
)(shrinker
, &sc
);
1098 #elif defined(HAVE_SHRINK)
1099 *objects
= (*shrinker
->shrink
)(shrinker
, &sc
);
1102 * Linux kernels older than 3.1 do not support a per-filesystem
1103 * shrinker. Therefore, we must fall back to the only available
1104 * interface which is to discard all unused dentries and inodes.
1105 * This behavior clearly isn't ideal but it's required so the ARC
1106 * may free memory. The performance impact is mitigated by the
1107 * fact that the frequently accessed dentry and inode buffers will
1108 * still be in the ARC making them relatively cheap to recreate.
1111 shrink_dcache_parent(sb
->s_root
);
1115 dprintf_ds(zsb
->z_os
->os_dsl_dataset
,
1116 "pruning, nr_to_scan=%lu objects=%d error=%d\n",
1117 nr_to_scan
, *objects
, error
);
1121 EXPORT_SYMBOL(zfs_sb_prune
);
1124 * Teardown the zfs_sb_t.
1126 * Note, if 'unmounting' if FALSE, we return with the 'z_teardown_lock'
1127 * and 'z_teardown_inactive_lock' held.
1130 zfs_sb_teardown(zfs_sb_t
*zsb
, boolean_t unmounting
)
1135 * If someone has not already unmounted this file system,
1136 * drain the iput_taskq to ensure all active references to the
1137 * zfs_sb_t have been handled only then can it be safely destroyed.
1141 * If we're unmounting we have to wait for the list to
1144 * If we're not unmounting there's no guarantee the list
1145 * will drain completely, but iputs run from the taskq
1146 * may add the parents of dir-based xattrs to the taskq
1147 * so we want to wait for these.
1149 * We can safely read z_nr_znodes without locking because the
1150 * VFS has already blocked operations which add to the
1151 * z_all_znodes list and thus increment z_nr_znodes.
1154 while (zsb
->z_nr_znodes
> 0) {
1155 taskq_wait(dsl_pool_iput_taskq(dmu_objset_pool(
1157 if (++round
> 1 && !unmounting
)
1162 rrw_enter(&zsb
->z_teardown_lock
, RW_WRITER
, FTAG
);
1166 * We purge the parent filesystem's super block as the
1167 * parent filesystem and all of its snapshots have their
1168 * inode's super block set to the parent's filesystem's
1169 * super block. Note, 'z_parent' is self referential
1170 * for non-snapshots.
1172 shrink_dcache_sb(zsb
->z_parent
->z_sb
);
1176 * Close the zil. NB: Can't close the zil while zfs_inactive
1177 * threads are blocked as zil_close can call zfs_inactive.
1180 zil_close(zsb
->z_log
);
1184 rw_enter(&zsb
->z_teardown_inactive_lock
, RW_WRITER
);
1187 * If we are not unmounting (ie: online recv) and someone already
1188 * unmounted this file system while we were doing the switcheroo,
1189 * or a reopen of z_os failed then just bail out now.
1191 if (!unmounting
&& (zsb
->z_unmounted
|| zsb
->z_os
== NULL
)) {
1192 rw_exit(&zsb
->z_teardown_inactive_lock
);
1193 rrw_exit(&zsb
->z_teardown_lock
, FTAG
);
1194 return (SET_ERROR(EIO
));
1198 * At this point there are no VFS ops active, and any new VFS ops
1199 * will fail with EIO since we have z_teardown_lock for writer (only
1200 * relevant for forced unmount).
1202 * Release all holds on dbufs.
1205 mutex_enter(&zsb
->z_znodes_lock
);
1206 for (zp
= list_head(&zsb
->z_all_znodes
); zp
!= NULL
;
1207 zp
= list_next(&zsb
->z_all_znodes
, zp
)) {
1209 zfs_znode_dmu_fini(zp
);
1211 mutex_exit(&zsb
->z_znodes_lock
);
1215 * If we are unmounting, set the unmounted flag and let new VFS ops
1216 * unblock. zfs_inactive will have the unmounted behavior, and all
1217 * other VFS ops will fail with EIO.
1220 zsb
->z_unmounted
= B_TRUE
;
1221 rrw_exit(&zsb
->z_teardown_lock
, FTAG
);
1222 rw_exit(&zsb
->z_teardown_inactive_lock
);
1226 * z_os will be NULL if there was an error in attempting to reopen
1227 * zsb, so just return as the properties had already been
1229 * unregistered and cached data had been evicted before.
1231 if (zsb
->z_os
== NULL
)
1235 * Unregister properties.
1237 zfs_unregister_callbacks(zsb
);
1242 if (dsl_dataset_is_dirty(dmu_objset_ds(zsb
->z_os
)) &&
1243 !zfs_is_readonly(zsb
))
1244 txg_wait_synced(dmu_objset_pool(zsb
->z_os
), 0);
1245 dmu_objset_evict_dbufs(zsb
->z_os
);
1249 EXPORT_SYMBOL(zfs_sb_teardown
);
1251 #if !defined(HAVE_2ARGS_BDI_SETUP_AND_REGISTER) && \
1252 !defined(HAVE_3ARGS_BDI_SETUP_AND_REGISTER)
1253 atomic_long_t zfs_bdi_seq
= ATOMIC_LONG_INIT(0);
1257 zfs_domount(struct super_block
*sb
, void *data
, int silent
)
1259 zpl_mount_data_t
*zmd
= data
;
1260 const char *osname
= zmd
->z_osname
;
1262 struct inode
*root_inode
;
1263 uint64_t recordsize
;
1266 error
= zfs_sb_create(osname
, &zsb
);
1270 if ((error
= dsl_prop_get_integer(osname
, "recordsize",
1271 &recordsize
, NULL
)))
1275 sb
->s_fs_info
= zsb
;
1276 sb
->s_magic
= ZFS_SUPER_MAGIC
;
1277 sb
->s_maxbytes
= MAX_LFS_FILESIZE
;
1278 sb
->s_time_gran
= 1;
1279 sb
->s_blocksize
= recordsize
;
1280 sb
->s_blocksize_bits
= ilog2(recordsize
);
1281 zsb
->z_bdi
.ra_pages
= 0;
1282 sb
->s_bdi
= &zsb
->z_bdi
;
1284 error
= -zpl_bdi_setup_and_register(&zsb
->z_bdi
, "zfs");
1288 /* Set callback operations for the file system. */
1289 sb
->s_op
= &zpl_super_operations
;
1290 sb
->s_xattr
= zpl_xattr_handlers
;
1291 sb
->s_export_op
= &zpl_export_operations
;
1293 sb
->s_d_op
= &zpl_dentry_operations
;
1294 #endif /* HAVE_S_D_OP */
1296 /* Set features for file system. */
1297 zfs_set_fuid_feature(zsb
);
1299 if (dmu_objset_is_snapshot(zsb
->z_os
)) {
1302 atime_changed_cb(zsb
, B_FALSE
);
1303 readonly_changed_cb(zsb
, B_TRUE
);
1304 if ((error
= dsl_prop_get_integer(osname
,
1305 "xattr", &pval
, NULL
)))
1307 xattr_changed_cb(zsb
, pval
);
1308 if ((error
= dsl_prop_get_integer(osname
,
1309 "acltype", &pval
, NULL
)))
1311 acltype_changed_cb(zsb
, pval
);
1312 zsb
->z_issnap
= B_TRUE
;
1313 zsb
->z_os
->os_sync
= ZFS_SYNC_DISABLED
;
1315 mutex_enter(&zsb
->z_os
->os_user_ptr_lock
);
1316 dmu_objset_set_user(zsb
->z_os
, zsb
);
1317 mutex_exit(&zsb
->z_os
->os_user_ptr_lock
);
1319 error
= zfs_sb_setup(zsb
, B_TRUE
);
1322 /* Allocate a root inode for the filesystem. */
1323 error
= zfs_root(zsb
, &root_inode
);
1325 (void) zfs_umount(sb
);
1329 /* Allocate a root dentry for the filesystem */
1330 sb
->s_root
= d_make_root(root_inode
);
1331 if (sb
->s_root
== NULL
) {
1332 (void) zfs_umount(sb
);
1333 error
= SET_ERROR(ENOMEM
);
1340 zsb
->z_arc_prune
= arc_add_prune_callback(zpl_prune_sb
, sb
);
1343 dmu_objset_disown(zsb
->z_os
, zsb
);
1349 EXPORT_SYMBOL(zfs_domount
);
1352 * Called when an unmount is requested and certain sanity checks have
1353 * already passed. At this point no dentries or inodes have been reclaimed
1354 * from their respective caches. We drop the extra reference on the .zfs
1355 * control directory to allow everything to be reclaimed. All snapshots
1356 * must already have been unmounted to reach this point.
1359 zfs_preumount(struct super_block
*sb
)
1361 zfs_sb_t
*zsb
= sb
->s_fs_info
;
1363 if (zsb
!= NULL
&& zsb
->z_ctldir
!= NULL
)
1364 zfsctl_destroy(zsb
);
1366 EXPORT_SYMBOL(zfs_preumount
);
1369 * Called once all other unmount released tear down has occurred.
1370 * It is our responsibility to release any remaining infrastructure.
1374 zfs_umount(struct super_block
*sb
)
1376 zfs_sb_t
*zsb
= sb
->s_fs_info
;
1379 arc_remove_prune_callback(zsb
->z_arc_prune
);
1380 VERIFY(zfs_sb_teardown(zsb
, B_TRUE
) == 0);
1382 bdi_destroy(sb
->s_bdi
);
1385 * z_os will be NULL if there was an error in
1386 * attempting to reopen zsb.
1390 * Unset the objset user_ptr.
1392 mutex_enter(&os
->os_user_ptr_lock
);
1393 dmu_objset_set_user(os
, NULL
);
1394 mutex_exit(&os
->os_user_ptr_lock
);
1397 * Finally release the objset
1399 dmu_objset_disown(os
, zsb
);
1405 EXPORT_SYMBOL(zfs_umount
);
1408 zfs_remount(struct super_block
*sb
, int *flags
, char *data
)
1411 * All namespace flags (MNT_*) and super block flags (MS_*) will
1412 * be handled by the Linux VFS. Only handle custom options here.
1416 EXPORT_SYMBOL(zfs_remount
);
1419 zfs_vget(struct super_block
*sb
, struct inode
**ipp
, fid_t
*fidp
)
1421 zfs_sb_t
*zsb
= sb
->s_fs_info
;
1423 uint64_t object
= 0;
1424 uint64_t fid_gen
= 0;
1433 if (fidp
->fid_len
== LONG_FID_LEN
) {
1434 zfid_long_t
*zlfid
= (zfid_long_t
*)fidp
;
1435 uint64_t objsetid
= 0;
1436 uint64_t setgen
= 0;
1438 for (i
= 0; i
< sizeof (zlfid
->zf_setid
); i
++)
1439 objsetid
|= ((uint64_t)zlfid
->zf_setid
[i
]) << (8 * i
);
1441 for (i
= 0; i
< sizeof (zlfid
->zf_setgen
); i
++)
1442 setgen
|= ((uint64_t)zlfid
->zf_setgen
[i
]) << (8 * i
);
1446 err
= zfsctl_lookup_objset(sb
, objsetid
, &zsb
);
1448 return (SET_ERROR(EINVAL
));
1453 if (fidp
->fid_len
== SHORT_FID_LEN
|| fidp
->fid_len
== LONG_FID_LEN
) {
1454 zfid_short_t
*zfid
= (zfid_short_t
*)fidp
;
1456 for (i
= 0; i
< sizeof (zfid
->zf_object
); i
++)
1457 object
|= ((uint64_t)zfid
->zf_object
[i
]) << (8 * i
);
1459 for (i
= 0; i
< sizeof (zfid
->zf_gen
); i
++)
1460 fid_gen
|= ((uint64_t)zfid
->zf_gen
[i
]) << (8 * i
);
1463 return (SET_ERROR(EINVAL
));
1466 /* A zero fid_gen means we are in the .zfs control directories */
1468 (object
== ZFSCTL_INO_ROOT
|| object
== ZFSCTL_INO_SNAPDIR
)) {
1469 *ipp
= zsb
->z_ctldir
;
1470 ASSERT(*ipp
!= NULL
);
1471 if (object
== ZFSCTL_INO_SNAPDIR
) {
1472 VERIFY(zfsctl_root_lookup(*ipp
, "snapshot", ipp
,
1473 0, kcred
, NULL
, NULL
) == 0);
1481 gen_mask
= -1ULL >> (64 - 8 * i
);
1483 dprintf("getting %llu [%llu mask %llx]\n", object
, fid_gen
, gen_mask
);
1484 if ((err
= zfs_zget(zsb
, object
, &zp
))) {
1488 (void) sa_lookup(zp
->z_sa_hdl
, SA_ZPL_GEN(zsb
), &zp_gen
,
1490 zp_gen
= zp_gen
& gen_mask
;
1493 if (zp
->z_unlinked
|| zp_gen
!= fid_gen
) {
1494 dprintf("znode gen (%llu) != fid gen (%llu)\n", zp_gen
,
1498 return (SET_ERROR(EINVAL
));
1503 zfs_inode_update(ITOZ(*ipp
));
1508 EXPORT_SYMBOL(zfs_vget
);
1511 * Block out VFS ops and close zfs_sb_t
1513 * Note, if successful, then we return with the 'z_teardown_lock' and
1514 * 'z_teardown_inactive_lock' write held. We leave ownership of the underlying
1515 * dataset and objset intact so that they can be atomically handed off during
1516 * a subsequent rollback or recv operation and the resume thereafter.
1519 zfs_suspend_fs(zfs_sb_t
*zsb
)
1523 if ((error
= zfs_sb_teardown(zsb
, B_FALSE
)) != 0)
1528 EXPORT_SYMBOL(zfs_suspend_fs
);
1531 * Reopen zfs_sb_t and release VFS ops.
1534 zfs_resume_fs(zfs_sb_t
*zsb
, const char *osname
)
1538 uint64_t sa_obj
= 0;
1540 ASSERT(RRW_WRITE_HELD(&zsb
->z_teardown_lock
));
1541 ASSERT(RW_WRITE_HELD(&zsb
->z_teardown_inactive_lock
));
1544 * We already own this, so just hold and rele it to update the
1545 * objset_t, as the one we had before may have been evicted.
1547 VERIFY0(dmu_objset_hold(osname
, zsb
, &zsb
->z_os
));
1548 VERIFY3P(zsb
->z_os
->os_dsl_dataset
->ds_owner
, ==, zsb
);
1549 VERIFY(dsl_dataset_long_held(zsb
->z_os
->os_dsl_dataset
));
1550 dmu_objset_rele(zsb
->z_os
, zsb
);
1553 * Make sure version hasn't changed
1556 err
= zfs_get_zplprop(zsb
->z_os
, ZFS_PROP_VERSION
,
1562 err
= zap_lookup(zsb
->z_os
, MASTER_NODE_OBJ
,
1563 ZFS_SA_ATTRS
, 8, 1, &sa_obj
);
1565 if (err
&& zsb
->z_version
>= ZPL_VERSION_SA
)
1568 if ((err
= sa_setup(zsb
->z_os
, sa_obj
,
1569 zfs_attr_table
, ZPL_END
, &zsb
->z_attr_table
)) != 0)
1572 if (zsb
->z_version
>= ZPL_VERSION_SA
)
1573 sa_register_update_callback(zsb
->z_os
,
1576 VERIFY(zfs_sb_setup(zsb
, B_FALSE
) == 0);
1578 zfs_set_fuid_feature(zsb
);
1579 zsb
->z_rollback_time
= jiffies
;
1582 * Attempt to re-establish all the active inodes with their
1583 * dbufs. If a zfs_rezget() fails, then we unhash the inode
1584 * and mark it stale. This prevents a collision if a new
1585 * inode/object is created which must use the same inode
1586 * number. The stale inode will be be released when the
1587 * VFS prunes the dentry holding the remaining references
1588 * on the stale inode.
1590 mutex_enter(&zsb
->z_znodes_lock
);
1591 for (zp
= list_head(&zsb
->z_all_znodes
); zp
;
1592 zp
= list_next(&zsb
->z_all_znodes
, zp
)) {
1593 err2
= zfs_rezget(zp
);
1595 remove_inode_hash(ZTOI(zp
));
1596 zp
->z_is_stale
= B_TRUE
;
1599 mutex_exit(&zsb
->z_znodes_lock
);
1602 /* release the VFS ops */
1603 rw_exit(&zsb
->z_teardown_inactive_lock
);
1604 rrw_exit(&zsb
->z_teardown_lock
, FTAG
);
1608 * Since we couldn't setup the sa framework, try to force
1609 * unmount this file system.
1612 (void) zfs_umount(zsb
->z_sb
);
1616 EXPORT_SYMBOL(zfs_resume_fs
);
1619 zfs_set_version(zfs_sb_t
*zsb
, uint64_t newvers
)
1622 objset_t
*os
= zsb
->z_os
;
1625 if (newvers
< ZPL_VERSION_INITIAL
|| newvers
> ZPL_VERSION
)
1626 return (SET_ERROR(EINVAL
));
1628 if (newvers
< zsb
->z_version
)
1629 return (SET_ERROR(EINVAL
));
1631 if (zfs_spa_version_map(newvers
) >
1632 spa_version(dmu_objset_spa(zsb
->z_os
)))
1633 return (SET_ERROR(ENOTSUP
));
1635 tx
= dmu_tx_create(os
);
1636 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_FALSE
, ZPL_VERSION_STR
);
1637 if (newvers
>= ZPL_VERSION_SA
&& !zsb
->z_use_sa
) {
1638 dmu_tx_hold_zap(tx
, MASTER_NODE_OBJ
, B_TRUE
,
1640 dmu_tx_hold_zap(tx
, DMU_NEW_OBJECT
, FALSE
, NULL
);
1642 error
= dmu_tx_assign(tx
, TXG_WAIT
);
1648 error
= zap_update(os
, MASTER_NODE_OBJ
, ZPL_VERSION_STR
,
1649 8, 1, &newvers
, tx
);
1656 if (newvers
>= ZPL_VERSION_SA
&& !zsb
->z_use_sa
) {
1659 ASSERT3U(spa_version(dmu_objset_spa(zsb
->z_os
)), >=,
1661 sa_obj
= zap_create(os
, DMU_OT_SA_MASTER_NODE
,
1662 DMU_OT_NONE
, 0, tx
);
1664 error
= zap_add(os
, MASTER_NODE_OBJ
,
1665 ZFS_SA_ATTRS
, 8, 1, &sa_obj
, tx
);
1668 VERIFY(0 == sa_set_sa_object(os
, sa_obj
));
1669 sa_register_update_callback(os
, zfs_sa_upgrade
);
1672 spa_history_log_internal_ds(dmu_objset_ds(os
), "upgrade", tx
,
1673 "from %llu to %llu", zsb
->z_version
, newvers
);
1677 zsb
->z_version
= newvers
;
1679 zfs_set_fuid_feature(zsb
);
1683 EXPORT_SYMBOL(zfs_set_version
);
1686 * Read a property stored within the master node.
1689 zfs_get_zplprop(objset_t
*os
, zfs_prop_t prop
, uint64_t *value
)
1692 int error
= SET_ERROR(ENOENT
);
1695 * Look up the file system's value for the property. For the
1696 * version property, we look up a slightly different string.
1698 if (prop
== ZFS_PROP_VERSION
)
1699 pname
= ZPL_VERSION_STR
;
1701 pname
= zfs_prop_to_name(prop
);
1704 error
= zap_lookup(os
, MASTER_NODE_OBJ
, pname
, 8, 1, value
);
1706 if (error
== ENOENT
) {
1707 /* No value set, use the default value */
1709 case ZFS_PROP_VERSION
:
1710 *value
= ZPL_VERSION
;
1712 case ZFS_PROP_NORMALIZE
:
1713 case ZFS_PROP_UTF8ONLY
:
1717 *value
= ZFS_CASE_SENSITIVE
;
1719 case ZFS_PROP_ACLTYPE
:
1720 *value
= ZFS_ACLTYPE_OFF
;
1729 EXPORT_SYMBOL(zfs_get_zplprop
);
1736 dmu_objset_register_type(DMU_OST_ZFS
, zfs_space_delta_cb
);
1737 register_filesystem(&zpl_fs_type
);
1743 taskq_wait(system_taskq
);
1744 unregister_filesystem(&zpl_fs_type
);