1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or https://opensource.org/licenses/CDDL-1.0. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright (c) 2011 by Delphix. All rights reserved. 25 * Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved. 26 */ 27 28 29 #include <sys/zfs_context.h> 30 #include <sys/fm/fs/zfs.h> 31 #include <sys/spa_impl.h> 32 #include <sys/zio.h> 33 #include <sys/zio_checksum.h> 34 #include <sys/dmu.h> 35 #include <sys/dmu_tx.h> 36 #include <sys/zap.h> 37 #include <sys/zil.h> 38 #include <sys/ddt.h> 39 #include <sys/vdev_impl.h> 40 #include <sys/vdev_os.h> 41 #include <sys/vdev_removal.h> 42 #include <sys/vdev_indirect_mapping.h> 43 #include <sys/vdev_indirect_births.h> 44 #include <sys/metaslab.h> 45 #include <sys/metaslab_impl.h> 46 #include <sys/uberblock_impl.h> 47 #include <sys/txg.h> 48 #include <sys/avl.h> 49 #include <sys/bpobj.h> 50 #include <sys/dmu_traverse.h> 51 #include <sys/dmu_objset.h> 52 #include <sys/unique.h> 53 #include <sys/dsl_pool.h> 54 #include <sys/dsl_dataset.h> 55 #include <sys/dsl_dir.h> 56 #include <sys/dsl_prop.h> 57 #include <sys/dsl_synctask.h> 58 #include <sys/fs/zfs.h> 59 #include <sys/arc.h> 60 #include <sys/callb.h> 61 #include <sys/zfs_ioctl.h> 62 #include <sys/dsl_scan.h> 63 #include <sys/dmu_send.h> 64 #include <sys/dsl_destroy.h> 65 #include <sys/dsl_userhold.h> 66 #include <sys/zfeature.h> 67 #include <sys/zvol.h> 68 #include <sys/abd.h> 69 #include <sys/callb.h> 70 #include <sys/zone.h> 71 72 #include "zfs_prop.h" 73 #include "zfs_comutil.h" 74 75 static nvlist_t * 76 spa_generate_rootconf(const char *name) 77 { 78 nvlist_t **configs, **tops; 79 nvlist_t *config; 80 nvlist_t *best_cfg, *nvtop, *nvroot; 81 uint64_t *holes; 82 uint64_t best_txg; 83 uint64_t nchildren; 84 uint64_t pgid; 85 uint64_t count; 86 uint64_t i; 87 uint_t nholes; 88 89 if (vdev_geom_read_pool_label(name, &configs, &count) != 0) 90 return (NULL); 91 92 ASSERT3U(count, !=, 0); 93 best_txg = 0; 94 for (i = 0; i < count; i++) { 95 uint64_t txg; 96 97 txg = fnvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG); 98 if (txg > best_txg) { 99 best_txg = txg; 100 best_cfg = configs[i]; 101 } 102 } 103 104 nchildren = 1; 105 nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren); 106 holes = NULL; 107 nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY, 108 &holes, &nholes); 109 110 tops = kmem_zalloc(nchildren * sizeof (void *), KM_SLEEP); 111 for (i = 0; i < nchildren; i++) { 112 if (i >= count) 113 break; 114 if (configs[i] == NULL) 115 continue; 116 nvtop = fnvlist_lookup_nvlist(configs[i], 117 ZPOOL_CONFIG_VDEV_TREE); 118 tops[i] = fnvlist_dup(nvtop); 119 } 120 for (i = 0; holes != NULL && i < nholes; i++) { 121 if (i >= nchildren) 122 continue; 123 if (tops[holes[i]] != NULL) 124 continue; 125 tops[holes[i]] = fnvlist_alloc(); 126 fnvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE, 127 VDEV_TYPE_HOLE); 128 fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, holes[i]); 129 fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 0); 130 } 131 for (i = 0; i < nchildren; i++) { 132 if (tops[i] != NULL) 133 continue; 134 tops[i] = fnvlist_alloc(); 135 fnvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE, 136 VDEV_TYPE_MISSING); 137 fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, i); 138 fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 0); 139 } 140 141 /* 142 * Create pool config based on the best vdev config. 143 */ 144 config = fnvlist_dup(best_cfg); 145 146 /* 147 * Put this pool's top-level vdevs into a root vdev. 148 */ 149 pgid = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID); 150 nvroot = fnvlist_alloc(); 151 fnvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT); 152 fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL); 153 fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid); 154 fnvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, 155 (const nvlist_t * const *)tops, nchildren); 156 157 /* 158 * Replace the existing vdev_tree with the new root vdev in 159 * this pool's configuration (remove the old, add the new). 160 */ 161 fnvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot); 162 163 /* 164 * Drop vdev config elements that should not be present at pool level. 165 */ 166 fnvlist_remove(config, ZPOOL_CONFIG_GUID); 167 fnvlist_remove(config, ZPOOL_CONFIG_TOP_GUID); 168 169 for (i = 0; i < count; i++) 170 fnvlist_free(configs[i]); 171 kmem_free(configs, count * sizeof (void *)); 172 for (i = 0; i < nchildren; i++) 173 fnvlist_free(tops[i]); 174 kmem_free(tops, nchildren * sizeof (void *)); 175 fnvlist_free(nvroot); 176 return (config); 177 } 178 179 int 180 spa_import_rootpool(const char *name, bool checkpointrewind) 181 { 182 spa_t *spa; 183 vdev_t *rvd; 184 nvlist_t *config, *nvtop; 185 char *pname; 186 int error; 187 188 /* 189 * Read the label from the boot device and generate a configuration. 190 */ 191 config = spa_generate_rootconf(name); 192 193 mutex_enter(&spa_namespace_lock); 194 if (config != NULL) { 195 pname = fnvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME); 196 VERIFY0(strcmp(name, pname)); 197 198 if ((spa = spa_lookup(pname)) != NULL) { 199 /* 200 * The pool could already be imported, 201 * e.g., after reboot -r. 202 */ 203 if (spa->spa_state == POOL_STATE_ACTIVE) { 204 mutex_exit(&spa_namespace_lock); 205 fnvlist_free(config); 206 return (0); 207 } 208 209 /* 210 * Remove the existing root pool from the namespace so 211 * that we can replace it with the correct config 212 * we just read in. 213 */ 214 spa_remove(spa); 215 } 216 spa = spa_add(pname, config, NULL); 217 218 /* 219 * Set spa_ubsync.ub_version as it can be used in vdev_alloc() 220 * via spa_version(). 221 */ 222 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION, 223 &spa->spa_ubsync.ub_version) != 0) 224 spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL; 225 } else if ((spa = spa_lookup(name)) == NULL) { 226 mutex_exit(&spa_namespace_lock); 227 fnvlist_free(config); 228 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'", 229 name); 230 return (EIO); 231 } else { 232 config = fnvlist_dup(spa->spa_config); 233 } 234 spa->spa_is_root = B_TRUE; 235 spa->spa_import_flags = ZFS_IMPORT_VERBATIM; 236 if (checkpointrewind) { 237 spa->spa_import_flags |= ZFS_IMPORT_CHECKPOINT; 238 } 239 240 /* 241 * Build up a vdev tree based on the boot device's label config. 242 */ 243 nvtop = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE); 244 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 245 error = spa_config_parse(spa, &rvd, nvtop, NULL, 0, 246 VDEV_ALLOC_ROOTPOOL); 247 spa_config_exit(spa, SCL_ALL, FTAG); 248 if (error) { 249 mutex_exit(&spa_namespace_lock); 250 fnvlist_free(config); 251 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'", 252 name); 253 return (error); 254 } 255 256 spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER); 257 vdev_free(rvd); 258 spa_config_exit(spa, SCL_ALL, FTAG); 259 mutex_exit(&spa_namespace_lock); 260 261 fnvlist_free(config); 262 return (0); 263 } 264 265 const char * 266 spa_history_zone(void) 267 { 268 return ("freebsd"); 269 } 270 271 void 272 spa_import_os(spa_t *spa) 273 { 274 (void) spa; 275 } 276 277 void 278 spa_export_os(spa_t *spa) 279 { 280 (void) spa; 281 } 282 283 void 284 spa_activate_os(spa_t *spa) 285 { 286 (void) spa; 287 } 288 289 void 290 spa_deactivate_os(spa_t *spa) 291 { 292 (void) spa; 293 } 294