282 lines
7.6 KiB
C
282 lines
7.6 KiB
C
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011 by Delphix. All rights reserved.
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* Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
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*/
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#include <sys/zfs_context.h>
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#include <sys/fm/fs/zfs.h>
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#include <sys/spa_impl.h>
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#include <sys/zio.h>
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#include <sys/zio_checksum.h>
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#include <sys/dmu.h>
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#include <sys/dmu_tx.h>
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#include <sys/zap.h>
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#include <sys/zil.h>
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#include <sys/ddt.h>
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#include <sys/vdev_impl.h>
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#include <sys/vdev_os.h>
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#include <sys/vdev_removal.h>
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#include <sys/vdev_indirect_mapping.h>
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#include <sys/vdev_indirect_births.h>
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#include <sys/metaslab.h>
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#include <sys/metaslab_impl.h>
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#include <sys/uberblock_impl.h>
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#include <sys/txg.h>
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#include <sys/avl.h>
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#include <sys/bpobj.h>
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#include <sys/dmu_traverse.h>
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#include <sys/dmu_objset.h>
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#include <sys/unique.h>
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#include <sys/dsl_pool.h>
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#include <sys/dsl_dataset.h>
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#include <sys/dsl_dir.h>
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#include <sys/dsl_prop.h>
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#include <sys/dsl_synctask.h>
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#include <sys/fs/zfs.h>
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#include <sys/arc.h>
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#include <sys/callb.h>
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#include <sys/spa_boot.h>
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#include <sys/zfs_ioctl.h>
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#include <sys/dsl_scan.h>
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#include <sys/dmu_send.h>
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#include <sys/dsl_destroy.h>
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#include <sys/dsl_userhold.h>
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#include <sys/zfeature.h>
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#include <sys/zvol.h>
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#include <sys/abd.h>
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#include <sys/callb.h>
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#include <sys/zone.h>
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#include "zfs_prop.h"
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#include "zfs_comutil.h"
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static nvlist_t *
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spa_generate_rootconf(const char *name)
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{
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nvlist_t **configs, **tops;
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nvlist_t *config;
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nvlist_t *best_cfg, *nvtop, *nvroot;
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uint64_t *holes;
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uint64_t best_txg;
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uint64_t nchildren;
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uint64_t pgid;
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uint64_t count;
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uint64_t i;
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uint_t nholes;
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if (vdev_geom_read_pool_label(name, &configs, &count) != 0)
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return (NULL);
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ASSERT3U(count, !=, 0);
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best_txg = 0;
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for (i = 0; i < count; i++) {
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uint64_t txg;
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VERIFY(nvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG,
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&txg) == 0);
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if (txg > best_txg) {
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best_txg = txg;
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best_cfg = configs[i];
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}
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}
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nchildren = 1;
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nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
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holes = NULL;
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nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
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&holes, &nholes);
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tops = kmem_zalloc(nchildren * sizeof (void *), KM_SLEEP);
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for (i = 0; i < nchildren; i++) {
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if (i >= count)
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break;
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if (configs[i] == NULL)
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continue;
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VERIFY(nvlist_lookup_nvlist(configs[i], ZPOOL_CONFIG_VDEV_TREE,
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&nvtop) == 0);
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nvlist_dup(nvtop, &tops[i], KM_SLEEP);
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}
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for (i = 0; holes != NULL && i < nholes; i++) {
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if (i >= nchildren)
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continue;
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if (tops[holes[i]] != NULL)
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continue;
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nvlist_alloc(&tops[holes[i]], NV_UNIQUE_NAME, KM_SLEEP);
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VERIFY(nvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
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VDEV_TYPE_HOLE) == 0);
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VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID,
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holes[i]) == 0);
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VERIFY(nvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID,
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0) == 0);
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}
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for (i = 0; i < nchildren; i++) {
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if (tops[i] != NULL)
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continue;
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nvlist_alloc(&tops[i], NV_UNIQUE_NAME, KM_SLEEP);
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VERIFY(nvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
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VDEV_TYPE_MISSING) == 0);
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VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID,
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i) == 0);
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VERIFY(nvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID,
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0) == 0);
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}
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/*
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* Create pool config based on the best vdev config.
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*/
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nvlist_dup(best_cfg, &config, KM_SLEEP);
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/*
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* Put this pool's top-level vdevs into a root vdev.
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*/
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VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID,
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&pgid) == 0);
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VERIFY(nvlist_alloc(&nvroot, NV_UNIQUE_NAME, KM_SLEEP) == 0);
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VERIFY(nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE,
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VDEV_TYPE_ROOT) == 0);
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VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) == 0);
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VERIFY(nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid) == 0);
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VERIFY(nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN,
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tops, nchildren) == 0);
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/*
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* Replace the existing vdev_tree with the new root vdev in
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* this pool's configuration (remove the old, add the new).
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*/
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VERIFY(nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot) == 0);
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/*
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* Drop vdev config elements that should not be present at pool level.
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*/
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nvlist_remove(config, ZPOOL_CONFIG_GUID, DATA_TYPE_UINT64);
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nvlist_remove(config, ZPOOL_CONFIG_TOP_GUID, DATA_TYPE_UINT64);
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for (i = 0; i < count; i++)
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nvlist_free(configs[i]);
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kmem_free(configs, count * sizeof (void *));
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for (i = 0; i < nchildren; i++)
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nvlist_free(tops[i]);
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kmem_free(tops, nchildren * sizeof (void *));
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nvlist_free(nvroot);
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return (config);
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}
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int
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spa_import_rootpool(const char *name, bool checkpointrewind)
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{
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spa_t *spa;
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vdev_t *rvd;
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nvlist_t *config, *nvtop;
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uint64_t txg;
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char *pname;
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int error;
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/*
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* Read the label from the boot device and generate a configuration.
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*/
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config = spa_generate_rootconf(name);
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mutex_enter(&spa_namespace_lock);
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if (config != NULL) {
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VERIFY(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME,
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&pname) == 0 && strcmp(name, pname) == 0);
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VERIFY(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, &txg)
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== 0);
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if ((spa = spa_lookup(pname)) != NULL) {
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/*
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* The pool could already be imported,
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* e.g., after reboot -r.
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*/
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if (spa->spa_state == POOL_STATE_ACTIVE) {
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mutex_exit(&spa_namespace_lock);
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nvlist_free(config);
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return (0);
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}
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/*
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* Remove the existing root pool from the namespace so
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* that we can replace it with the correct config
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* we just read in.
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*/
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spa_remove(spa);
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}
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spa = spa_add(pname, config, NULL);
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/*
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* Set spa_ubsync.ub_version as it can be used in vdev_alloc()
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* via spa_version().
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*/
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if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
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&spa->spa_ubsync.ub_version) != 0)
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spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
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} else if ((spa = spa_lookup(name)) == NULL) {
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mutex_exit(&spa_namespace_lock);
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nvlist_free(config);
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cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
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name);
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return (EIO);
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} else {
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VERIFY(nvlist_dup(spa->spa_config, &config, KM_SLEEP) == 0);
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}
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spa->spa_is_root = B_TRUE;
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spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
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if (checkpointrewind) {
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spa->spa_import_flags |= ZFS_IMPORT_CHECKPOINT;
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}
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/*
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* Build up a vdev tree based on the boot device's label config.
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*/
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VERIFY(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE,
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&nvtop) == 0);
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spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
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error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
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VDEV_ALLOC_ROOTPOOL);
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spa_config_exit(spa, SCL_ALL, FTAG);
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if (error) {
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mutex_exit(&spa_namespace_lock);
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nvlist_free(config);
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cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
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pname);
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return (error);
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}
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spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
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vdev_free(rvd);
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spa_config_exit(spa, SCL_ALL, FTAG);
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mutex_exit(&spa_namespace_lock);
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nvlist_free(config);
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return (0);
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}
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const char *
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spa_history_zone(void)
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{
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return ("freebsd");
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}
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