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, 2014 by Delphix. All rights reserved.
26 #include <sys/zfs_context.h>
27 #include <sys/uberblock_impl.h>
28 #include <sys/vdev_impl.h>
31 uberblock_verify(uberblock_t
*ub
)
33 if (ub
->ub_magic
== BSWAP_64((uint64_t)UBERBLOCK_MAGIC
))
34 byteswap_uint64_array(ub
, sizeof (uberblock_t
));
36 if (ub
->ub_magic
!= UBERBLOCK_MAGIC
)
37 return (SET_ERROR(EINVAL
));
43 * Update the uberblock and return TRUE if anything changed in this
47 uberblock_update(uberblock_t
*ub
, vdev_t
*rvd
, uint64_t txg
)
49 ASSERT(ub
->ub_txg
< txg
);
52 * We explicitly do not set ub_version here, so that older versions
53 * continue to be written with the previous uberblock version.
55 ub
->ub_magic
= UBERBLOCK_MAGIC
;
57 ub
->ub_guid_sum
= rvd
->vdev_guid_sum
;
58 ub
->ub_timestamp
= gethrestime_sec();
59 ub
->ub_software_version
= SPA_VERSION
;
61 return (ub
->ub_rootbp
.blk_birth
== txg
);