1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5ea8dc4b6Seschrock * Common Development and Distribution License (the "License"). 6ea8dc4b6Seschrock * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22*3f9d6ad7SLin Ling * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23fa9e4066Sahrens */ 24fa9e4066Sahrens 25fa9e4066Sahrens #include <sys/zfs_context.h> 26fa9e4066Sahrens #include <sys/uberblock_impl.h> 27fa9e4066Sahrens #include <sys/vdev_impl.h> 28fa9e4066Sahrens 29fa9e4066Sahrens int 30fa9e4066Sahrens uberblock_verify(uberblock_t *ub) 31fa9e4066Sahrens { 32fa9e4066Sahrens if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) 33fa9e4066Sahrens byteswap_uint64_array(ub, sizeof (uberblock_t)); 34fa9e4066Sahrens 35fa9e4066Sahrens if (ub->ub_magic != UBERBLOCK_MAGIC) 36fa9e4066Sahrens return (EINVAL); 37fa9e4066Sahrens 38fa9e4066Sahrens return (0); 39fa9e4066Sahrens } 40fa9e4066Sahrens 41fa9e4066Sahrens /* 42fa9e4066Sahrens * Update the uberblock and return a boolean value indicating whether 43fa9e4066Sahrens * anything changed in this transaction group. 44fa9e4066Sahrens */ 45fa9e4066Sahrens int 46fa9e4066Sahrens uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg) 47fa9e4066Sahrens { 48fa9e4066Sahrens ASSERT(ub->ub_txg < txg); 49fa9e4066Sahrens 50eaca9bbdSeschrock /* 51eaca9bbdSeschrock * We explicitly do not set ub_version here, so that older versions 52eaca9bbdSeschrock * continue to be written with the previous uberblock version. 53eaca9bbdSeschrock */ 54fa9e4066Sahrens ub->ub_magic = UBERBLOCK_MAGIC; 55fa9e4066Sahrens ub->ub_txg = txg; 56fa9e4066Sahrens ub->ub_guid_sum = rvd->vdev_guid_sum; 57fa9e4066Sahrens ub->ub_timestamp = gethrestime_sec(); 58*3f9d6ad7SLin Ling ub->ub_software_version = SPA_VERSION; 59fa9e4066Sahrens 60fa9e4066Sahrens return (ub->ub_rootbp.blk_birth == txg); 61fa9e4066Sahrens } 62