/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011 by Delphix. All rights reserved.
* Copyright (c) 2013 Martin Matuska <mm@FreeBSD.org>. All rights reserved.
*/
#include <sys/zfs_context.h>
#include <sys/fm/fs/zfs.h>
#include <sys/spa_impl.h>
#include <sys/zio.h>
#include <sys/zio_checksum.h>
#include <sys/dmu.h>
#include <sys/dmu_tx.h>
#include <sys/zap.h>
#include <sys/zil.h>
#include <sys/ddt.h>
#include <sys/vdev_impl.h>
#include <sys/vdev_os.h>
#include <sys/vdev_removal.h>
#include <sys/vdev_indirect_mapping.h>
#include <sys/vdev_indirect_births.h>
#include <sys/metaslab.h>
#include <sys/metaslab_impl.h>
#include <sys/uberblock_impl.h>
#include <sys/txg.h>
#include <sys/avl.h>
#include <sys/bpobj.h>
#include <sys/dmu_traverse.h>
#include <sys/dmu_objset.h>
#include <sys/unique.h>
#include <sys/dsl_pool.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_prop.h>
#include <sys/dsl_synctask.h>
#include <sys/fs/zfs.h>
#include <sys/arc.h>
#include <sys/callb.h>
#include <sys/spa_boot.h>
#include <sys/zfs_ioctl.h>
#include <sys/dsl_scan.h>
#include <sys/dmu_send.h>
#include <sys/dsl_destroy.h>
#include <sys/dsl_userhold.h>
#include <sys/zfeature.h>
#include <sys/zvol.h>
#include <sys/abd.h>
#include <sys/callb.h>
#include <sys/zone.h>
#include "zfs_prop.h"
#include "zfs_comutil.h"
static nvlist_t *
spa_generate_rootconf(const char *name)
{
nvlist_t **configs, **tops;
nvlist_t *config;
nvlist_t *best_cfg, *nvtop, *nvroot;
uint64_t *holes;
uint64_t best_txg;
uint64_t nchildren;
uint64_t pgid;
uint64_t count;
uint64_t i;
uint_t nholes;
if (vdev_geom_read_pool_label(name, &configs, &count) != 0)
return (NULL);
ASSERT3U(count, !=, 0);
best_txg = 0;
for (i = 0; i < count; i++) {
uint64_t txg;
txg = fnvlist_lookup_uint64(configs[i], ZPOOL_CONFIG_POOL_TXG);
if (txg > best_txg) {
best_txg = txg;
best_cfg = configs[i];
}
}
nchildren = 1;
nvlist_lookup_uint64(best_cfg, ZPOOL_CONFIG_VDEV_CHILDREN, &nchildren);
holes = NULL;
nvlist_lookup_uint64_array(best_cfg, ZPOOL_CONFIG_HOLE_ARRAY,
&holes, &nholes);
tops = kmem_zalloc(nchildren * sizeof (void *), KM_SLEEP);
for (i = 0; i < nchildren; i++) {
if (i >= count)
break;
if (configs[i] == NULL)
continue;
nvtop = fnvlist_lookup_nvlist(configs[i],
ZPOOL_CONFIG_VDEV_TREE);
tops[i] = fnvlist_dup(nvtop);
}
for (i = 0; holes != NULL && i < nholes; i++) {
if (i >= nchildren)
continue;
if (tops[holes[i]] != NULL)
continue;
tops[holes[i]] = fnvlist_alloc();
fnvlist_add_string(tops[holes[i]], ZPOOL_CONFIG_TYPE,
VDEV_TYPE_HOLE);
fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_ID, holes[i]);
fnvlist_add_uint64(tops[holes[i]], ZPOOL_CONFIG_GUID, 0);
}
for (i = 0; i < nchildren; i++) {
if (tops[i] != NULL)
continue;
tops[i] = fnvlist_alloc();
fnvlist_add_string(tops[i], ZPOOL_CONFIG_TYPE,
VDEV_TYPE_MISSING);
fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_ID, i);
fnvlist_add_uint64(tops[i], ZPOOL_CONFIG_GUID, 0);
}
/*
* Create pool config based on the best vdev config.
*/
config = fnvlist_dup(best_cfg);
/*
* Put this pool's top-level vdevs into a root vdev.
*/
pgid = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID);
nvroot = fnvlist_alloc();
fnvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT);
fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL);
fnvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, pgid);
fnvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, tops,
nchildren);
/*
* Replace the existing vdev_tree with the new root vdev in
* this pool's configuration (remove the old, add the new).
*/
fnvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, nvroot);
/*
* Drop vdev config elements that should not be present at pool level.
*/
fnvlist_remove(config, ZPOOL_CONFIG_GUID);
fnvlist_remove(config, ZPOOL_CONFIG_TOP_GUID);
for (i = 0; i < count; i++)
fnvlist_free(configs[i]);
kmem_free(configs, count * sizeof (void *));
for (i = 0; i < nchildren; i++)
fnvlist_free(tops[i]);
kmem_free(tops, nchildren * sizeof (void *));
fnvlist_free(nvroot);
return (config);
}
int
spa_import_rootpool(const char *name, bool checkpointrewind)
{
spa_t *spa;
vdev_t *rvd;
nvlist_t *config, *nvtop;
uint64_t txg;
char *pname;
int error;
/*
* Read the label from the boot device and generate a configuration.
*/
config = spa_generate_rootconf(name);
mutex_enter(&spa_namespace_lock);
if (config != NULL) {
pname = fnvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME);
VERIFY0(strcmp(name, pname));
txg = fnvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG);
if ((spa = spa_lookup(pname)) != NULL) {
/*
* The pool could already be imported,
* e.g., after reboot -r.
*/
if (spa->spa_state == POOL_STATE_ACTIVE) {
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
return (0);
}
/*
* Remove the existing root pool from the namespace so
* that we can replace it with the correct config
* we just read in.
*/
spa_remove(spa);
}
spa = spa_add(pname, config, NULL);
/*
* Set spa_ubsync.ub_version as it can be used in vdev_alloc()
* via spa_version().
*/
if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_VERSION,
&spa->spa_ubsync.ub_version) != 0)
spa->spa_ubsync.ub_version = SPA_VERSION_INITIAL;
} else if ((spa = spa_lookup(name)) == NULL) {
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
cmn_err(CE_NOTE, "Cannot find the pool label for '%s'",
name);
return (EIO);
} else {
config = fnvlist_dup(spa->spa_config);
}
spa->spa_is_root = B_TRUE;
spa->spa_import_flags = ZFS_IMPORT_VERBATIM;
if (checkpointrewind) {
spa->spa_import_flags |= ZFS_IMPORT_CHECKPOINT;
}
/*
* Build up a vdev tree based on the boot device's label config.
*/
nvtop = fnvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE);
spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
error = spa_config_parse(spa, &rvd, nvtop, NULL, 0,
VDEV_ALLOC_ROOTPOOL);
spa_config_exit(spa, SCL_ALL, FTAG);
if (error) {
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
cmn_err(CE_NOTE, "Can not parse the config for pool '%s'",
pname);
return (error);
}
spa_config_enter(spa, SCL_ALL, FTAG, RW_WRITER);
vdev_free(rvd);
spa_config_exit(spa, SCL_ALL, FTAG);
mutex_exit(&spa_namespace_lock);
fnvlist_free(config);
return (0);
}
const char *
spa_history_zone(void)
{
return ("freebsd");
}
