1789Sahrens /* 2789Sahrens * CDDL HEADER START 3789Sahrens * 4789Sahrens * The contents of this file are subject to the terms of the 51544Seschrock * Common Development and Distribution License (the "License"). 61544Seschrock * You may not use this file except in compliance with the License. 7789Sahrens * 8789Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9789Sahrens * or http://www.opensolaris.org/os/licensing. 10789Sahrens * See the License for the specific language governing permissions 11789Sahrens * and limitations under the License. 12789Sahrens * 13789Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14789Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15789Sahrens * If applicable, add the following below this CDDL HEADER, with the 16789Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17789Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18789Sahrens * 19789Sahrens * CDDL HEADER END 20789Sahrens */ 21789Sahrens /* 221544Seschrock * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23789Sahrens * Use is subject to license terms. 24789Sahrens */ 25789Sahrens 26789Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 27789Sahrens 28789Sahrens #include <sys/zfs_context.h> 29789Sahrens #include <sys/uberblock_impl.h> 30789Sahrens #include <sys/vdev_impl.h> 31789Sahrens 32789Sahrens int 33789Sahrens uberblock_verify(uberblock_t *ub) 34789Sahrens { 35789Sahrens if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) 36789Sahrens byteswap_uint64_array(ub, sizeof (uberblock_t)); 37789Sahrens 38789Sahrens if (ub->ub_magic != UBERBLOCK_MAGIC) 39789Sahrens return (EINVAL); 40789Sahrens 41789Sahrens return (0); 42789Sahrens } 43789Sahrens 44789Sahrens /* 45789Sahrens * Update the uberblock and return a boolean value indicating whether 46789Sahrens * anything changed in this transaction group. 47789Sahrens */ 48789Sahrens int 49789Sahrens uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg) 50789Sahrens { 51789Sahrens ASSERT(ub->ub_txg < txg); 52789Sahrens 53*1760Seschrock /* 54*1760Seschrock * We explicitly do not set ub_version here, so that older versions 55*1760Seschrock * continue to be written with the previous uberblock version. 56*1760Seschrock */ 57789Sahrens ub->ub_magic = UBERBLOCK_MAGIC; 58789Sahrens ub->ub_txg = txg; 59789Sahrens ub->ub_guid_sum = rvd->vdev_guid_sum; 60789Sahrens ub->ub_timestamp = gethrestime_sec(); 61789Sahrens 62789Sahrens return (ub->ub_rootbp.blk_birth == txg); 63789Sahrens } 64