63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2013, 2014 by Delphix. All rights reserved.
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*/
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#include <sys/zfs_context.h>
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#include <sys/uberblock_impl.h>
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#include <sys/vdev_impl.h>
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int
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uberblock_verify(uberblock_t *ub)
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{
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if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC))
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byteswap_uint64_array(ub, sizeof (uberblock_t));
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if (ub->ub_magic != UBERBLOCK_MAGIC)
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return (SET_ERROR(EINVAL));
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return (0);
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}
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/*
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* Update the uberblock and return TRUE if anything changed in this
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* transaction group.
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*/
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boolean_t
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uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg)
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{
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ASSERT(ub->ub_txg < txg);
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/*
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* We explicitly do not set ub_version here, so that older versions
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* continue to be written with the previous uberblock version.
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*/
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ub->ub_magic = UBERBLOCK_MAGIC;
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ub->ub_txg = txg;
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ub->ub_guid_sum = rvd->vdev_guid_sum;
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ub->ub_timestamp = gethrestime_sec();
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ub->ub_software_version = SPA_VERSION;
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return (ub->ub_rootbp.blk_birth == txg);
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}
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