1*e7cbe64fSgw /* 2*e7cbe64fSgw * CDDL HEADER START 3*e7cbe64fSgw * 4*e7cbe64fSgw * The contents of this file are subject to the terms of the 5*e7cbe64fSgw * Common Development and Distribution License (the "License"). 6*e7cbe64fSgw * You may not use this file except in compliance with the License. 7*e7cbe64fSgw * 8*e7cbe64fSgw * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*e7cbe64fSgw * or http://www.opensolaris.org/os/licensing. 10*e7cbe64fSgw * See the License for the specific language governing permissions 11*e7cbe64fSgw * and limitations under the License. 12*e7cbe64fSgw * 13*e7cbe64fSgw * When distributing Covered Code, include this CDDL HEADER in each 14*e7cbe64fSgw * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*e7cbe64fSgw * If applicable, add the following below this CDDL HEADER, with the 16*e7cbe64fSgw * fields enclosed by brackets "[]" replaced with your own identifying 17*e7cbe64fSgw * information: Portions Copyright [yyyy] [name of copyright owner] 18*e7cbe64fSgw * 19*e7cbe64fSgw * CDDL HEADER END 20*e7cbe64fSgw */ 21*e7cbe64fSgw 22*e7cbe64fSgw /* 23*e7cbe64fSgw * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24*e7cbe64fSgw * Use is subject to license terms. 25*e7cbe64fSgw */ 26*e7cbe64fSgw 27*e7cbe64fSgw #pragma ident "%Z%%M% %I% %E% SMI" 28*e7cbe64fSgw 29*e7cbe64fSgw #include <sys/spa.h> 30*e7cbe64fSgw #include <sys/bootconf.h> 31*e7cbe64fSgw 32*e7cbe64fSgw char * 33*e7cbe64fSgw spa_get_bootfs() 34*e7cbe64fSgw { 35*e7cbe64fSgw int proplen; 36*e7cbe64fSgw char *zfs_bp; 37*e7cbe64fSgw 38*e7cbe64fSgw proplen = BOP_GETPROPLEN(bootops, "zfs-bootfs"); 39*e7cbe64fSgw if (proplen == 0) 40*e7cbe64fSgw return (NULL); 41*e7cbe64fSgw 42*e7cbe64fSgw zfs_bp = kmem_zalloc(proplen, KM_SLEEP); 43*e7cbe64fSgw if (BOP_GETPROP(bootops, "zfs-bootfs", zfs_bp) == -1) { 44*e7cbe64fSgw kmem_free(zfs_bp, proplen); 45*e7cbe64fSgw return (NULL); 46*e7cbe64fSgw } 47*e7cbe64fSgw 48*e7cbe64fSgw return (zfs_bp); 49*e7cbe64fSgw } 50*e7cbe64fSgw 51*e7cbe64fSgw void 52*e7cbe64fSgw spa_free_bootfs(char *bootfs) 53*e7cbe64fSgw { 54*e7cbe64fSgw kmem_free(bootfs, strlen(bootfs) + 1); 55*e7cbe64fSgw } 56*e7cbe64fSgw 57*e7cbe64fSgw /* 58*e7cbe64fSgw * Given the boot device physpath, check if the device is in a valid state. 59*e7cbe64fSgw * If so, return the configuration from the vdev label. 60*e7cbe64fSgw */ 61*e7cbe64fSgw int 62*e7cbe64fSgw spa_get_rootconf(char *devpath, char **bestdev, nvlist_t **bestconf) 63*e7cbe64fSgw { 64*e7cbe64fSgw nvlist_t *conf = NULL; 65*e7cbe64fSgw char *dev = NULL; 66*e7cbe64fSgw uint64_t txg = 0; 67*e7cbe64fSgw nvlist_t *nvtop, **child; 68*e7cbe64fSgw char *type; 69*e7cbe64fSgw uint_t children, c; 70*e7cbe64fSgw 71*e7cbe64fSgw spa_check_rootconf(devpath, &dev, &conf, &txg); 72*e7cbe64fSgw if (txg == 0 || conf == NULL) 73*e7cbe64fSgw return (EINVAL); 74*e7cbe64fSgw 75*e7cbe64fSgw VERIFY(nvlist_lookup_nvlist(conf, ZPOOL_CONFIG_VDEV_TREE, 76*e7cbe64fSgw &nvtop) == 0); 77*e7cbe64fSgw VERIFY(nvlist_lookup_string(nvtop, ZPOOL_CONFIG_TYPE, &type) == 0); 78*e7cbe64fSgw 79*e7cbe64fSgw if (strcmp(type, VDEV_TYPE_DISK) == 0) { 80*e7cbe64fSgw if (spa_rootdev_validate(nvtop)) 81*e7cbe64fSgw goto out; 82*e7cbe64fSgw else 83*e7cbe64fSgw return (EINVAL); 84*e7cbe64fSgw } 85*e7cbe64fSgw 86*e7cbe64fSgw ASSERT(strcmp(type, VDEV_TYPE_MIRROR) == 0); 87*e7cbe64fSgw 88*e7cbe64fSgw VERIFY(nvlist_lookup_nvlist_array(nvtop, ZPOOL_CONFIG_CHILDREN, 89*e7cbe64fSgw &child, &children) == 0); 90*e7cbe64fSgw 91*e7cbe64fSgw /* 92*e7cbe64fSgw * Go thru vdevs in the mirror to see if the given device (devpath) 93*e7cbe64fSgw * is in a healthy state. Also check if the given device has the most 94*e7cbe64fSgw * recent txg. Only the device with the most recent txg has valid 95*e7cbe64fSgw * information and can be booted. 96*e7cbe64fSgw */ 97*e7cbe64fSgw for (c = 0; c < children; c++) { 98*e7cbe64fSgw char *physpath; 99*e7cbe64fSgw 100*e7cbe64fSgw if (nvlist_lookup_string(child[c], ZPOOL_CONFIG_PHYS_PATH, 101*e7cbe64fSgw &physpath) != 0) 102*e7cbe64fSgw return (EINVAL); 103*e7cbe64fSgw 104*e7cbe64fSgw if (strcmp(devpath, physpath) == 0) { 105*e7cbe64fSgw if (!spa_rootdev_validate(child[c])) 106*e7cbe64fSgw return (EINVAL); 107*e7cbe64fSgw } else { 108*e7cbe64fSgw /* get dev with the highest txg */ 109*e7cbe64fSgw if (spa_rootdev_validate(child[c])) { 110*e7cbe64fSgw spa_check_rootconf(physpath, &dev, 111*e7cbe64fSgw &conf, &txg); 112*e7cbe64fSgw } 113*e7cbe64fSgw } 114*e7cbe64fSgw } 115*e7cbe64fSgw 116*e7cbe64fSgw /* Does the given device have the most recent txg? */ 117*e7cbe64fSgw if (strcmp(devpath, dev) != 0) 118*e7cbe64fSgw return (EINVAL); 119*e7cbe64fSgw out: 120*e7cbe64fSgw *bestdev = dev; 121*e7cbe64fSgw *bestconf = conf; 122*e7cbe64fSgw return (0); 123*e7cbe64fSgw } 124