module/os/freebsd/zfs/spa_os.c

   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                 if (configs[i] == NULL)
  98                         continue;
  99                 txg = fnvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG);
 100                 if (txg > best_txg) {
 101                         best_txg = txg;
 102                         best_cfg = configs[i];
 103                 }
 104         }
 105
 106         nchildren = 1;
 107         nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
 108         holes = NULL;
 109         nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
 110             &holes, &nholes);
 111
 112         tops = kmem_zalloc(nchildren * sizeof (void *), KM_SLEEP);
 113         for (i = 0; i < nchildren; i++) {
 114                 if (i >= count)
 115                         break;
 116                 if (configs[i] == NULL)
 117                         continue;
 118                 nvtop = fnvlist_lookup_nvlist(configs[i],
 119                     ZPOOL_CONFIG_VDEV_TREE);
 120                 tops[i] = fnvlist_dup(nvtop);
 121         }
 122         for (i = 0; holes != NULL && i < nholes; i++) {
 123                 if (i >= nchildren)
 124                         continue;
 125                 if (tops[holes[i]] != NULL)
 126                         continue;
 127                 tops[holes[i]] = fnvlist_alloc();
 128                 fnvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
 129                     VDEV_TYPE_HOLE);
 130                 fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, holes[i]);
 131                 fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 0);
 132         }
 133         for (i = 0; i < nchildren; i++) {
 134                 if (tops[i] != NULL)
 135                         continue;
 136                 tops[i] = fnvlist_alloc();
 137                 fnvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
 138                     VDEV_TYPE_MISSING);
 139                 fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, i);
 140                 fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 0);
 141         }
 142
 143         /*
 144          * Create pool config based on the best vdev config.
 145          */
 146         config = fnvlist_dup(best_cfg);
 147
 148         /*
 149          * Put this pool's top-level vdevs into a root vdev.
 150          */
 151         pgid = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID);
 152         nvroot = fnvlist_alloc();
 153         fnvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT);
 154         fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL);
 155         fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid);
 156         fnvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
 157             (const nvlist_t * const *)tops, nchildren);
 158
 159         /*
 160          * Replace the existing vdev_tree with the new root vdev in
 161          * this pool's configuration (remove the old, add the new).
 162          */
 163         fnvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot);
 164
 165         /*
 166          * Drop vdev config elements that should not be present at pool level.
 167          */
 168         fnvlist_remove(config, ZPOOL_CONFIG_GUID);
 169         fnvlist_remove(config, ZPOOL_CONFIG_TOP_GUID);
 170
 171         for (i = 0; i < count; i++)
 172                 fnvlist_free(configs[i]);
 173         kmem_free(configs, count * sizeof (void *));
 174         for (i = 0; i < nchildren; i++)
 175                 fnvlist_free(tops[i]);
 176         kmem_free(tops, nchildren * sizeof (void *));
 177         fnvlist_free(nvroot);
 178         return (config);
 179 }
 180
 181 int
 182 spa_import_rootpool(const char *name, bool checkpointrewind)
 183 {
 184         spa_t *spa;
 185         vdev_t *rvd;
 186         nvlist_t *config, *nvtop;
 187         const char *pname;
 188         int error;
 189
 190         /*
 191          * Read the label from the boot device and generate a configuration.
 192          */
 193         config = spa_generate_rootconf(name);
 194
 195         mutex_enter(&spa_namespace_lock);
 196         if (config != NULL) {
 197                 pname = fnvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME);
 198                 VERIFY0(strcmp(name, pname));
 199
 200                 if ((spa = spa_lookup(pname)) != NULL) {
 201                         /*
 202                          * The pool could already be imported,
 203                          * e.g., after reboot -r.
 204                          */
 205                         if (spa->spa_state == POOL_STATE_ACTIVE) {
 206                                 mutex_exit(&spa_namespace_lock);
 207                                 fnvlist_free(config);
 208                                 return (0);
 209                         }
 210
 211                         /*
 212                          * Remove the existing root pool from the namespace so
 213                          * that we can replace it with the correct config
 214                          * we just read in.
 215                          */
 216                         spa_remove(spa);
 217                 }
 218                 spa = spa_add(pname, config, NULL);
 219
 220                 /*
 221                  * Set spa_ubsync.ub_version as it can be used in vdev_alloc()
 222                  * via spa_version().
 223                  */
 224                 if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
 225                     &spa->spa_ubsync.ub_version) != 0)
 226                         spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
 227         } else if ((spa = spa_lookup(name)) == NULL) {
 228                 mutex_exit(&spa_namespace_lock);
 229                 fnvlist_free(config);
 230                 cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
 231                     name);
 232                 return (EIO);
 233         } else {
 234                 config = fnvlist_dup(spa->spa_config);
 235         }
 236         spa->spa_is_root = B_TRUE;
 237         spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
 238         if (checkpointrewind) {
 239                 spa->spa_import_flags |= ZFS_IMPORT_CHECKPOINT;
 240         }
 241
 242         /*
 243          * Build up a vdev tree based on the boot device's label config.
 244          */
 245         nvtop = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE);
 246         spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
 247         error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
 248             VDEV_ALLOC_ROOTPOOL);
 249         spa_config_exit(spa, SCL_ALL, FTAG);
 250         if (error) {
 251                 mutex_exit(&spa_namespace_lock);
 252                 fnvlist_free(config);
 253                 cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
 254                     name);
 255                 return (error);
 256         }
 257
 258         spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
 259         vdev_free(rvd);
 260         spa_config_exit(spa, SCL_ALL, FTAG);
 261         mutex_exit(&spa_namespace_lock);
 262
 263         fnvlist_free(config);
 264         return (0);
 265 }
 266
 267 const char *
 268 spa_history_zone(void)
 269 {
 270         return ("freebsd");
 271 }
 272
 273 void
 274 spa_import_os(spa_t *spa)
 275 {
 276         (void) spa;
 277 }
 278
 279 void
 280 spa_export_os(spa_t *spa)
 281 {
 282         (void) spa;
 283 }
 284
 285 void
 286 spa_activate_os(spa_t *spa)
 287 {
 288         (void) spa;
 289 }
 290
 291 void
 292 spa_deactivate_os(spa_t *spa)
 293 {
 294         (void) spa;
 295 }