1 // SPDX-License-Identifier: CDDL-1.0 2 /* 3 * CDDL HEADER START 4 * 5 * The contents of this file are subject to the terms of the 6 * Common Development and Distribution License (the "License"). 7 * You may not use this file except in compliance with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or https://opensource.org/licenses/CDDL-1.0. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2013, 2017 by Delphix. All rights reserved. 25 */ 26 27 #include <sys/zfs_context.h> 28 #include <sys/uberblock_impl.h> 29 #include <sys/vdev_impl.h> 30 #include <sys/mmp.h> 31 32 int 33 uberblock_verify(uberblock_t *ub) 34 { 35 if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) 36 byteswap_uint64_array(ub, sizeof (uberblock_t)); 37 38 if (ub->ub_magic != UBERBLOCK_MAGIC) 39 return (SET_ERROR(EINVAL)); 40 41 return (0); 42 } 43 44 /* 45 * Update the uberblock and return TRUE if anything changed in this 46 * transaction group. 47 */ 48 boolean_t 49 uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg, uint64_t mmp_delay) 50 { 51 ASSERT(ub->ub_txg < txg); 52 53 /* 54 * We explicitly do not set ub_version here, so that older versions 55 * continue to be written with the previous uberblock version. 56 */ 57 ub->ub_magic = UBERBLOCK_MAGIC; 58 ub->ub_txg = txg; 59 ub->ub_guid_sum = rvd->vdev_guid_sum; 60 ub->ub_timestamp = gethrestime_sec(); 61 ub->ub_software_version = SPA_VERSION; 62 ub->ub_mmp_magic = MMP_MAGIC; 63 if (spa_multihost(rvd->vdev_spa)) { 64 ub->ub_mmp_delay = mmp_delay; 65 ub->ub_mmp_config = MMP_SEQ_SET(0) | 66 MMP_INTERVAL_SET(zfs_multihost_interval) | 67 MMP_FAIL_INT_SET(zfs_multihost_fail_intervals); 68 } else { 69 ub->ub_mmp_delay = 0; 70 ub->ub_mmp_config = 0; 71 } 72 ub->ub_checkpoint_txg = 0; 73 74 return (BP_GET_LOGICAL_BIRTH(&ub->ub_rootbp) == txg); 75 } 76