1 /* 2 * CDDL HEADER START 3 * 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. 7 * 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. 12 * 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] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright (c) 2013, 2014 by Delphix. All rights reserved. 24 */ 25 26 #include <sys/zfs_context.h> 27 #include <sys/uberblock_impl.h> 28 #include <sys/vdev_impl.h> 29 30 int 31 uberblock_verify(uberblock_t *ub) 32 { 33 if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) 34 byteswap_uint64_array(ub, sizeof (uberblock_t)); 35 36 if (ub->ub_magic != UBERBLOCK_MAGIC) 37 return (SET_ERROR(EINVAL)); 38 39 return (0); 40 } 41 42 /* 43 * Update the uberblock and return TRUE if anything changed in this 44 * transaction group. 45 */ 46 boolean_t 47 uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg) 48 { 49 ASSERT(ub->ub_txg < txg); 50 51 /* 52 * We explicitly do not set ub_version here, so that older versions 53 * continue to be written with the previous uberblock version. 54 */ 55 ub->ub_magic = UBERBLOCK_MAGIC; 56 ub->ub_txg = txg; 57 ub->ub_guid_sum = rvd->vdev_guid_sum; 58 ub->ub_timestamp = gethrestime_sec(); 59 ub->ub_software_version = SPA_VERSION; 60 61 return (ub->ub_rootbp.blk_birth == txg); 62 } 63