1*789Sahrens /* 2*789Sahrens * CDDL HEADER START 3*789Sahrens * 4*789Sahrens * The contents of this file are subject to the terms of the 5*789Sahrens * Common Development and Distribution License, Version 1.0 only 6*789Sahrens * (the "License"). You may not use this file except in compliance 7*789Sahrens * with the License. 8*789Sahrens * 9*789Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*789Sahrens * or http://www.opensolaris.org/os/licensing. 11*789Sahrens * See the License for the specific language governing permissions 12*789Sahrens * and limitations under the License. 13*789Sahrens * 14*789Sahrens * When distributing Covered Code, include this CDDL HEADER in each 15*789Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*789Sahrens * If applicable, add the following below this CDDL HEADER, with the 17*789Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 18*789Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 19*789Sahrens * 20*789Sahrens * CDDL HEADER END 21*789Sahrens */ 22*789Sahrens /* 23*789Sahrens * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24*789Sahrens * Use is subject to license terms. 25*789Sahrens */ 26*789Sahrens 27*789Sahrens #pragma ident "%Z%%M% %I% %E% SMI" 28*789Sahrens 29*789Sahrens #include <sys/zfs_context.h> 30*789Sahrens #include <sys/uberblock_impl.h> 31*789Sahrens #include <sys/vdev_impl.h> 32*789Sahrens 33*789Sahrens /* Keep the uberblock version in a varialbe so we can get at it with mdb */ 34*789Sahrens static uint64_t uberblock_version = UBERBLOCK_VERSION; 35*789Sahrens 36*789Sahrens int 37*789Sahrens uberblock_verify(uberblock_t *ub) 38*789Sahrens { 39*789Sahrens if (ub->ub_magic == BSWAP_64((uint64_t)UBERBLOCK_MAGIC)) 40*789Sahrens byteswap_uint64_array(ub, sizeof (uberblock_t)); 41*789Sahrens 42*789Sahrens if (ub->ub_magic != UBERBLOCK_MAGIC) 43*789Sahrens return (EINVAL); 44*789Sahrens 45*789Sahrens if (ub->ub_version != UBERBLOCK_VERSION) 46*789Sahrens return (ENOTSUP); 47*789Sahrens 48*789Sahrens return (0); 49*789Sahrens } 50*789Sahrens 51*789Sahrens /* 52*789Sahrens * Update the uberblock and return a boolean value indicating whether 53*789Sahrens * anything changed in this transaction group. 54*789Sahrens */ 55*789Sahrens int 56*789Sahrens uberblock_update(uberblock_t *ub, vdev_t *rvd, uint64_t txg) 57*789Sahrens { 58*789Sahrens ASSERT(ub->ub_txg < txg); 59*789Sahrens 60*789Sahrens ub->ub_magic = UBERBLOCK_MAGIC; 61*789Sahrens ub->ub_version = UBERBLOCK_VERSION; 62*789Sahrens ub->ub_txg = txg; 63*789Sahrens ub->ub_guid_sum = rvd->vdev_guid_sum; 64*789Sahrens ub->ub_timestamp = gethrestime_sec(); 65*789Sahrens 66*789Sahrens return (ub->ub_rootbp.blk_birth == txg); 67*789Sahrens } 68