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 https://opensource.org/licenses/CDDL-1.0. 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, 2017 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 #include <sys/mmp.h> 30 31 int 32 uberblock_verify(uberblock_t *ub) 33 { 34 if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) 35 byteswap_uint64_array(ub, sizeof (uberblock_t)); 36 37 if (ub->ub_magic != UBERBLOCK_MAGIC) 38 return (SET_ERROR(EINVAL)); 39 40 return (0); 41 } 42 43 /* 44 * Update the uberblock and return TRUE if anything changed in this 45 * transaction group. 46 */ 47 boolean_t 48 uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg, uint64_t mmp_delay) 49 { 50 ASSERT(ub->ub_txg < txg); 51 52 /* 53 * We explicitly do not set ub_version here, so that older versions 54 * continue to be written with the previous uberblock version. 55 */ 56 ub->ub_magic = UBERBLOCK_MAGIC; 57 ub->ub_txg = txg; 58 ub->ub_guid_sum = rvd->vdev_guid_sum; 59 ub->ub_timestamp = gethrestime_sec(); 60 ub->ub_software_version = SPA_VERSION; 61 ub->ub_mmp_magic = MMP_MAGIC; 62 if (spa_multihost(rvd->vdev_spa)) { 63 ub->ub_mmp_delay = mmp_delay; 64 ub->ub_mmp_config = MMP_SEQ_SET(0) | 65 MMP_INTERVAL_SET(zfs_multihost_interval) | 66 MMP_FAIL_INT_SET(zfs_multihost_fail_intervals); 67 } else { 68 ub->ub_mmp_delay = 0; 69 ub->ub_mmp_config = 0; 70 } 71 ub->ub_checkpoint_txg = 0; 72 73 return (ub->ub_rootbp.blk_birth == txg); 74 } 75