| /* |
| * CDDL HEADER START |
| * |
| * The contents of this file are subject to the terms of the |
| * Common Development and Distribution License (the "License"). |
| * You may not use this file except in compliance with the License. |
| * |
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
| * or http://www.opensolaris.org/os/licensing. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * |
| * When distributing Covered Code, include this CDDL HEADER in each |
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
| * If applicable, add the following below this CDDL HEADER, with the |
| * fields enclosed by brackets "[]" replaced with your own identifying |
| * information: Portions Copyright [yyyy] [name of copyright owner] |
| * |
| * CDDL HEADER END |
| */ |
| /* |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2013, 2017 by Delphix. All rights reserved. |
| */ |
| |
| #include <sys/zfs_context.h> |
| #include <sys/uberblock_impl.h> |
| #include <sys/vdev_impl.h> |
| #include <sys/mmp.h> |
| |
| int |
| uberblock_verify(uberblock_t *ub) |
| { |
| if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) |
| byteswap_uint64_array(ub, sizeof (uberblock_t)); |
| |
| if (ub->ub_magic != UBERBLOCK_MAGIC) |
| return (SET_ERROR(EINVAL)); |
| |
| return (0); |
| } |
| |
| /* |
| * Update the uberblock and return TRUE if anything changed in this |
| * transaction group. |
| */ |
| boolean_t |
| uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg, uint64_t mmp_delay) |
| { |
| ASSERT(ub->ub_txg < txg); |
| |
| /* |
| * We explicitly do not set ub_version here, so that older versions |
| * continue to be written with the previous uberblock version. |
| */ |
| ub->ub_magic = UBERBLOCK_MAGIC; |
| ub->ub_txg = txg; |
| ub->ub_guid_sum = rvd->vdev_guid_sum; |
| ub->ub_timestamp = gethrestime_sec(); |
| ub->ub_software_version = SPA_VERSION; |
| ub->ub_mmp_magic = MMP_MAGIC; |
| if (spa_multihost(rvd->vdev_spa)) { |
| ub->ub_mmp_delay = mmp_delay; |
| ub->ub_mmp_config = MMP_SEQ_SET(0) | |
| MMP_INTERVAL_SET(zfs_multihost_interval) | |
| MMP_FAIL_INT_SET(zfs_multihost_fail_intervals); |
| } else { |
| ub->ub_mmp_delay = 0; |
| ub->ub_mmp_config = 0; |
| } |
| ub->ub_checkpoint_txg = 0; |
| |
| return (ub->ub_rootbp.blk_birth == txg); |
| } |