/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License, Version 1.0 only * (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 2005 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ #pragma ident "%Z%%M% %I% %E% SMI" #include <sys/zfs_context.h> #include <sys/uberblock_impl.h> #include <sys/vdev_impl.h> /* Keep the uberblock version in a varialbe so we can get at it with mdb */ static uint64_t uberblock_version = UBERBLOCK_VERSION; 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 (EINVAL); if (ub->ub_version != UBERBLOCK_VERSION) return (ENOTSUP); return (0); } /* * Update the uberblock and return a boolean value indicating whether * anything changed in this transaction group. */ int uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg) { ASSERT(ub->ub_txg < txg); ub->ub_magic = UBERBLOCK_MAGIC; ub->ub_version = UBERBLOCK_VERSION; ub->ub_txg = txg; ub->ub_guid_sum = rvd->vdev_guid_sum; ub->ub_timestamp = gethrestime_sec(); return (ub->ub_rootbp.blk_birth == txg); }