1043 lines
28 KiB
C
1043 lines
28 KiB
C
/*
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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 2009 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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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_prop.h>
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#include <sys/dsl_dir.h>
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#include <sys/dsl_synctask.h>
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#include <sys/dnode.h>
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#include <sys/dmu_tx.h>
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#include <sys/dmu_objset.h>
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#include <sys/arc.h>
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#include <sys/zap.h>
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#include <sys/zio.h>
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#include <sys/zfs_context.h>
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#include <sys/fs/zfs.h>
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#include <sys/zfs_znode.h>
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#include <sys/spa_impl.h>
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#include <sys/vdev_impl.h>
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#include <sys/zil_impl.h>
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typedef int (scrub_cb_t)(dsl_pool_t *, const blkptr_t *, const zbookmark_t *);
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static scrub_cb_t dsl_pool_scrub_clean_cb;
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static dsl_syncfunc_t dsl_pool_scrub_cancel_sync;
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static void scrub_visitdnode(dsl_pool_t *dp, dnode_phys_t *dnp, arc_buf_t *buf,
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uint64_t objset, uint64_t object);
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int zfs_scrub_min_time = 1; /* scrub for at least 1 sec each txg */
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int zfs_resilver_min_time = 3; /* resilver for at least 3 sec each txg */
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boolean_t zfs_no_scrub_io = B_FALSE; /* set to disable scrub i/o */
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extern int zfs_txg_timeout;
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static scrub_cb_t *scrub_funcs[SCRUB_FUNC_NUMFUNCS] = {
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NULL,
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dsl_pool_scrub_clean_cb
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};
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#define SET_BOOKMARK(zb, objset, object, level, blkid) \
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{ \
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(zb)->zb_objset = objset; \
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(zb)->zb_object = object; \
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(zb)->zb_level = level; \
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(zb)->zb_blkid = blkid; \
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}
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/* ARGSUSED */
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static void
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dsl_pool_scrub_setup_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
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{
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dsl_pool_t *dp = arg1;
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enum scrub_func *funcp = arg2;
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dmu_object_type_t ot = 0;
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boolean_t complete = B_FALSE;
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dsl_pool_scrub_cancel_sync(dp, &complete, cr, tx);
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ASSERT(dp->dp_scrub_func == SCRUB_FUNC_NONE);
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ASSERT(*funcp > SCRUB_FUNC_NONE);
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ASSERT(*funcp < SCRUB_FUNC_NUMFUNCS);
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dp->dp_scrub_min_txg = 0;
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dp->dp_scrub_max_txg = tx->tx_txg;
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if (*funcp == SCRUB_FUNC_CLEAN) {
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vdev_t *rvd = dp->dp_spa->spa_root_vdev;
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/* rewrite all disk labels */
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vdev_config_dirty(rvd);
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if (vdev_resilver_needed(rvd,
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&dp->dp_scrub_min_txg, &dp->dp_scrub_max_txg)) {
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spa_event_notify(dp->dp_spa, NULL,
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ESC_ZFS_RESILVER_START);
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dp->dp_scrub_max_txg = MIN(dp->dp_scrub_max_txg,
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tx->tx_txg);
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} else {
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spa_event_notify(dp->dp_spa, NULL,
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ESC_ZFS_SCRUB_START);
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}
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/* zero out the scrub stats in all vdev_stat_t's */
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vdev_scrub_stat_update(rvd,
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dp->dp_scrub_min_txg ? POOL_SCRUB_RESILVER :
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POOL_SCRUB_EVERYTHING, B_FALSE);
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dp->dp_spa->spa_scrub_started = B_TRUE;
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}
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/* back to the generic stuff */
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if (dp->dp_blkstats == NULL) {
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dp->dp_blkstats =
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kmem_alloc(sizeof (zfs_all_blkstats_t), KM_SLEEP);
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}
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bzero(dp->dp_blkstats, sizeof (zfs_all_blkstats_t));
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if (spa_version(dp->dp_spa) < SPA_VERSION_DSL_SCRUB)
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ot = DMU_OT_ZAP_OTHER;
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dp->dp_scrub_func = *funcp;
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dp->dp_scrub_queue_obj = zap_create(dp->dp_meta_objset,
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ot ? ot : DMU_OT_SCRUB_QUEUE, DMU_OT_NONE, 0, tx);
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bzero(&dp->dp_scrub_bookmark, sizeof (zbookmark_t));
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dp->dp_scrub_restart = B_FALSE;
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dp->dp_spa->spa_scrub_errors = 0;
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VERIFY(0 == zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_FUNC, sizeof (uint32_t), 1,
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&dp->dp_scrub_func, tx));
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VERIFY(0 == zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_QUEUE, sizeof (uint64_t), 1,
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&dp->dp_scrub_queue_obj, tx));
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VERIFY(0 == zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_MIN_TXG, sizeof (uint64_t), 1,
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&dp->dp_scrub_min_txg, tx));
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VERIFY(0 == zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_MAX_TXG, sizeof (uint64_t), 1,
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&dp->dp_scrub_max_txg, tx));
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VERIFY(0 == zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_BOOKMARK, sizeof (uint64_t), 4,
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&dp->dp_scrub_bookmark, tx));
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VERIFY(0 == zap_add(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_ERRORS, sizeof (uint64_t), 1,
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&dp->dp_spa->spa_scrub_errors, tx));
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spa_history_internal_log(LOG_POOL_SCRUB, dp->dp_spa, tx, cr,
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"func=%u mintxg=%llu maxtxg=%llu",
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*funcp, dp->dp_scrub_min_txg, dp->dp_scrub_max_txg);
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}
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int
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dsl_pool_scrub_setup(dsl_pool_t *dp, enum scrub_func func)
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{
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return (dsl_sync_task_do(dp, NULL,
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dsl_pool_scrub_setup_sync, dp, &func, 0));
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}
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/* ARGSUSED */
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static void
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dsl_pool_scrub_cancel_sync(void *arg1, void *arg2, cred_t *cr, dmu_tx_t *tx)
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{
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dsl_pool_t *dp = arg1;
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boolean_t *completep = arg2;
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if (dp->dp_scrub_func == SCRUB_FUNC_NONE)
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return;
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mutex_enter(&dp->dp_scrub_cancel_lock);
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if (dp->dp_scrub_restart) {
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dp->dp_scrub_restart = B_FALSE;
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*completep = B_FALSE;
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}
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/* XXX this is scrub-clean specific */
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mutex_enter(&dp->dp_spa->spa_scrub_lock);
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while (dp->dp_spa->spa_scrub_inflight > 0) {
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cv_wait(&dp->dp_spa->spa_scrub_io_cv,
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&dp->dp_spa->spa_scrub_lock);
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}
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mutex_exit(&dp->dp_spa->spa_scrub_lock);
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dp->dp_spa->spa_scrub_started = B_FALSE;
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dp->dp_spa->spa_scrub_active = B_FALSE;
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dp->dp_scrub_func = SCRUB_FUNC_NONE;
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VERIFY(0 == dmu_object_free(dp->dp_meta_objset,
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dp->dp_scrub_queue_obj, tx));
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dp->dp_scrub_queue_obj = 0;
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bzero(&dp->dp_scrub_bookmark, sizeof (zbookmark_t));
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VERIFY(0 == zap_remove(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_QUEUE, tx));
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VERIFY(0 == zap_remove(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_MIN_TXG, tx));
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VERIFY(0 == zap_remove(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_MAX_TXG, tx));
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VERIFY(0 == zap_remove(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_BOOKMARK, tx));
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VERIFY(0 == zap_remove(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_FUNC, tx));
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VERIFY(0 == zap_remove(dp->dp_meta_objset, DMU_POOL_DIRECTORY_OBJECT,
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DMU_POOL_SCRUB_ERRORS, tx));
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spa_history_internal_log(LOG_POOL_SCRUB_DONE, dp->dp_spa, tx, cr,
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"complete=%u", *completep);
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/* below is scrub-clean specific */
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vdev_scrub_stat_update(dp->dp_spa->spa_root_vdev, POOL_SCRUB_NONE,
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*completep);
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/*
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* If the scrub/resilver completed, update all DTLs to reflect this.
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* Whether it succeeded or not, vacate all temporary scrub DTLs.
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*/
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vdev_dtl_reassess(dp->dp_spa->spa_root_vdev, tx->tx_txg,
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*completep ? dp->dp_scrub_max_txg : 0, B_TRUE);
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if (*completep)
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spa_event_notify(dp->dp_spa, NULL, dp->dp_scrub_min_txg ?
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ESC_ZFS_RESILVER_FINISH : ESC_ZFS_SCRUB_FINISH);
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spa_errlog_rotate(dp->dp_spa);
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/*
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* We may have finished replacing a device.
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* Let the async thread assess this and handle the detach.
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*/
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spa_async_request(dp->dp_spa, SPA_ASYNC_RESILVER_DONE);
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dp->dp_scrub_min_txg = dp->dp_scrub_max_txg = 0;
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mutex_exit(&dp->dp_scrub_cancel_lock);
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}
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int
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dsl_pool_scrub_cancel(dsl_pool_t *dp)
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{
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boolean_t complete = B_FALSE;
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return (dsl_sync_task_do(dp, NULL,
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dsl_pool_scrub_cancel_sync, dp, &complete, 3));
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}
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int
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dsl_free(zio_t *pio, dsl_pool_t *dp, uint64_t txg, const blkptr_t *bpp,
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zio_done_func_t *done, void *private, uint32_t arc_flags)
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{
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/*
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* This function will be used by bp-rewrite wad to intercept frees.
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*/
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return (arc_free(pio, dp->dp_spa, txg, (blkptr_t *)bpp,
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done, private, arc_flags));
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}
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static boolean_t
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bookmark_is_zero(const zbookmark_t *zb)
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{
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return (zb->zb_objset == 0 && zb->zb_object == 0 &&
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zb->zb_level == 0 && zb->zb_blkid == 0);
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}
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/* dnp is the dnode for zb1->zb_object */
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static boolean_t
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bookmark_is_before(dnode_phys_t *dnp, const zbookmark_t *zb1,
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const zbookmark_t *zb2)
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{
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uint64_t zb1nextL0, zb2thisobj;
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ASSERT(zb1->zb_objset == zb2->zb_objset);
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ASSERT(zb1->zb_object != -1ULL);
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ASSERT(zb2->zb_level == 0);
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/*
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* A bookmark in the deadlist is considered to be after
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* everything else.
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*/
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if (zb2->zb_object == -1ULL)
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return (B_TRUE);
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/* The objset_phys_t isn't before anything. */
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if (dnp == NULL)
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return (B_FALSE);
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zb1nextL0 = (zb1->zb_blkid + 1) <<
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((zb1->zb_level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT));
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zb2thisobj = zb2->zb_object ? zb2->zb_object :
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zb2->zb_blkid << (DNODE_BLOCK_SHIFT - DNODE_SHIFT);
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if (zb1->zb_object == 0) {
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uint64_t nextobj = zb1nextL0 *
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(dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT) >> DNODE_SHIFT;
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return (nextobj <= zb2thisobj);
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}
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if (zb1->zb_object < zb2thisobj)
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return (B_TRUE);
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if (zb1->zb_object > zb2thisobj)
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return (B_FALSE);
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if (zb2->zb_object == 0)
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return (B_FALSE);
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return (zb1nextL0 <= zb2->zb_blkid);
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}
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static boolean_t
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scrub_pause(dsl_pool_t *dp, const zbookmark_t *zb)
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{
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int elapsed_ticks;
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int mintime;
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if (dp->dp_scrub_pausing)
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return (B_TRUE); /* we're already pausing */
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if (!bookmark_is_zero(&dp->dp_scrub_bookmark))
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return (B_FALSE); /* we're resuming */
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/* We only know how to resume from level-0 blocks. */
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if (zb->zb_level != 0)
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return (B_FALSE);
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mintime = dp->dp_scrub_isresilver ? zfs_resilver_min_time :
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zfs_scrub_min_time;
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elapsed_ticks = lbolt64 - dp->dp_scrub_start_time;
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if (elapsed_ticks > hz * zfs_txg_timeout ||
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(elapsed_ticks > hz * mintime && txg_sync_waiting(dp))) {
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dprintf("pausing at %llx/%llx/%llx/%llx\n",
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(longlong_t)zb->zb_objset, (longlong_t)zb->zb_object,
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(longlong_t)zb->zb_level, (longlong_t)zb->zb_blkid);
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dp->dp_scrub_pausing = B_TRUE;
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dp->dp_scrub_bookmark = *zb;
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return (B_TRUE);
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}
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return (B_FALSE);
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}
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typedef struct zil_traverse_arg {
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dsl_pool_t *zta_dp;
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zil_header_t *zta_zh;
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} zil_traverse_arg_t;
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/* ARGSUSED */
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static void
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traverse_zil_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
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{
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zil_traverse_arg_t *zta = arg;
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dsl_pool_t *dp = zta->zta_dp;
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zil_header_t *zh = zta->zta_zh;
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zbookmark_t zb;
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if (bp->blk_birth <= dp->dp_scrub_min_txg)
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return;
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/*
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* One block ("stubby") can be allocated a long time ago; we
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* want to visit that one because it has been allocated
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* (on-disk) even if it hasn't been claimed (even though for
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* plain scrub there's nothing to do to it).
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*/
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if (claim_txg == 0 && bp->blk_birth >= spa_first_txg(dp->dp_spa))
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return;
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zb.zb_objset = zh->zh_log.blk_cksum.zc_word[ZIL_ZC_OBJSET];
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zb.zb_object = 0;
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zb.zb_level = -1;
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zb.zb_blkid = bp->blk_cksum.zc_word[ZIL_ZC_SEQ];
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VERIFY(0 == scrub_funcs[dp->dp_scrub_func](dp, bp, &zb));
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}
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/* ARGSUSED */
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static void
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traverse_zil_record(zilog_t *zilog, lr_t *lrc, void *arg, uint64_t claim_txg)
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{
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if (lrc->lrc_txtype == TX_WRITE) {
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zil_traverse_arg_t *zta = arg;
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dsl_pool_t *dp = zta->zta_dp;
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zil_header_t *zh = zta->zta_zh;
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lr_write_t *lr = (lr_write_t *)lrc;
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blkptr_t *bp = &lr->lr_blkptr;
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zbookmark_t zb;
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if (bp->blk_birth <= dp->dp_scrub_min_txg)
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return;
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/*
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* birth can be < claim_txg if this record's txg is
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* already txg sync'ed (but this log block contains
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* other records that are not synced)
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*/
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if (claim_txg == 0 || bp->blk_birth < claim_txg)
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return;
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zb.zb_objset = zh->zh_log.blk_cksum.zc_word[ZIL_ZC_OBJSET];
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zb.zb_object = lr->lr_foid;
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zb.zb_level = BP_GET_LEVEL(bp);
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zb.zb_blkid = lr->lr_offset / BP_GET_LSIZE(bp);
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VERIFY(0 == scrub_funcs[dp->dp_scrub_func](dp, bp, &zb));
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}
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}
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static void
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traverse_zil(dsl_pool_t *dp, zil_header_t *zh)
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{
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uint64_t claim_txg = zh->zh_claim_txg;
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zil_traverse_arg_t zta = { dp, zh };
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zilog_t *zilog;
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|
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/*
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* We only want to visit blocks that have been claimed but not yet
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* replayed (or, in read-only mode, blocks that *would* be claimed).
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*/
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if (claim_txg == 0 && spa_writeable(dp->dp_spa))
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return;
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zilog = zil_alloc(dp->dp_meta_objset, zh);
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|
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(void) zil_parse(zilog, traverse_zil_block, traverse_zil_record, &zta,
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claim_txg);
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zil_free(zilog);
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}
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static void
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scrub_visitbp(dsl_pool_t *dp, dnode_phys_t *dnp,
|
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arc_buf_t *pbuf, blkptr_t *bp, const zbookmark_t *zb)
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|
{
|
|
int err;
|
|
arc_buf_t *buf = NULL;
|
|
|
|
if (bp->blk_birth <= dp->dp_scrub_min_txg)
|
|
return;
|
|
|
|
if (scrub_pause(dp, zb))
|
|
return;
|
|
|
|
if (!bookmark_is_zero(&dp->dp_scrub_bookmark)) {
|
|
/*
|
|
* If we already visited this bp & everything below (in
|
|
* a prior txg), don't bother doing it again.
|
|
*/
|
|
if (bookmark_is_before(dnp, zb, &dp->dp_scrub_bookmark))
|
|
return;
|
|
|
|
/*
|
|
* If we found the block we're trying to resume from, or
|
|
* we went past it to a different object, zero it out to
|
|
* indicate that it's OK to start checking for pausing
|
|
* again.
|
|
*/
|
|
if (bcmp(zb, &dp->dp_scrub_bookmark, sizeof (*zb)) == 0 ||
|
|
zb->zb_object > dp->dp_scrub_bookmark.zb_object) {
|
|
dprintf("resuming at %llx/%llx/%llx/%llx\n",
|
|
(longlong_t)zb->zb_objset,
|
|
(longlong_t)zb->zb_object,
|
|
(longlong_t)zb->zb_level,
|
|
(longlong_t)zb->zb_blkid);
|
|
bzero(&dp->dp_scrub_bookmark, sizeof (*zb));
|
|
}
|
|
}
|
|
|
|
if (BP_GET_LEVEL(bp) > 0) {
|
|
uint32_t flags = ARC_WAIT;
|
|
int i;
|
|
blkptr_t *cbp;
|
|
int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
|
|
|
|
err = arc_read(NULL, dp->dp_spa, bp, pbuf,
|
|
arc_getbuf_func, &buf,
|
|
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
|
|
if (err) {
|
|
mutex_enter(&dp->dp_spa->spa_scrub_lock);
|
|
dp->dp_spa->spa_scrub_errors++;
|
|
mutex_exit(&dp->dp_spa->spa_scrub_lock);
|
|
return;
|
|
}
|
|
cbp = buf->b_data;
|
|
|
|
for (i = 0; i < epb; i++, cbp++) {
|
|
zbookmark_t czb;
|
|
|
|
SET_BOOKMARK(&czb, zb->zb_objset, zb->zb_object,
|
|
zb->zb_level - 1,
|
|
zb->zb_blkid * epb + i);
|
|
scrub_visitbp(dp, dnp, buf, cbp, &czb);
|
|
}
|
|
} else if (BP_GET_TYPE(bp) == DMU_OT_DNODE) {
|
|
uint32_t flags = ARC_WAIT;
|
|
dnode_phys_t *child_dnp;
|
|
int i;
|
|
int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
|
|
|
|
err = arc_read(NULL, dp->dp_spa, bp, pbuf,
|
|
arc_getbuf_func, &buf,
|
|
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
|
|
if (err) {
|
|
mutex_enter(&dp->dp_spa->spa_scrub_lock);
|
|
dp->dp_spa->spa_scrub_errors++;
|
|
mutex_exit(&dp->dp_spa->spa_scrub_lock);
|
|
return;
|
|
}
|
|
child_dnp = buf->b_data;
|
|
|
|
for (i = 0; i < epb; i++, child_dnp++) {
|
|
scrub_visitdnode(dp, child_dnp, buf, zb->zb_objset,
|
|
zb->zb_blkid * epb + i);
|
|
}
|
|
} else if (BP_GET_TYPE(bp) == DMU_OT_OBJSET) {
|
|
uint32_t flags = ARC_WAIT;
|
|
objset_phys_t *osp;
|
|
|
|
err = arc_read_nolock(NULL, dp->dp_spa, bp,
|
|
arc_getbuf_func, &buf,
|
|
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
|
|
if (err) {
|
|
mutex_enter(&dp->dp_spa->spa_scrub_lock);
|
|
dp->dp_spa->spa_scrub_errors++;
|
|
mutex_exit(&dp->dp_spa->spa_scrub_lock);
|
|
return;
|
|
}
|
|
|
|
osp = buf->b_data;
|
|
|
|
traverse_zil(dp, &osp->os_zil_header);
|
|
|
|
scrub_visitdnode(dp, &osp->os_meta_dnode,
|
|
buf, zb->zb_objset, 0);
|
|
if (arc_buf_size(buf) >= sizeof (objset_phys_t)) {
|
|
scrub_visitdnode(dp, &osp->os_userused_dnode,
|
|
buf, zb->zb_objset, 0);
|
|
scrub_visitdnode(dp, &osp->os_groupused_dnode,
|
|
buf, zb->zb_objset, 0);
|
|
}
|
|
}
|
|
|
|
(void) scrub_funcs[dp->dp_scrub_func](dp, bp, zb);
|
|
if (buf)
|
|
(void) arc_buf_remove_ref(buf, &buf);
|
|
}
|
|
|
|
static void
|
|
scrub_visitdnode(dsl_pool_t *dp, dnode_phys_t *dnp, arc_buf_t *buf,
|
|
uint64_t objset, uint64_t object)
|
|
{
|
|
int j;
|
|
|
|
for (j = 0; j < dnp->dn_nblkptr; j++) {
|
|
zbookmark_t czb;
|
|
|
|
SET_BOOKMARK(&czb, objset, object, dnp->dn_nlevels - 1, j);
|
|
scrub_visitbp(dp, dnp, buf, &dnp->dn_blkptr[j], &czb);
|
|
}
|
|
|
|
}
|
|
|
|
static void
|
|
scrub_visit_rootbp(dsl_pool_t *dp, dsl_dataset_t *ds, blkptr_t *bp)
|
|
{
|
|
zbookmark_t zb;
|
|
|
|
SET_BOOKMARK(&zb, ds ? ds->ds_object : 0, 0, -1, 0);
|
|
scrub_visitbp(dp, NULL, NULL, bp, &zb);
|
|
}
|
|
|
|
void
|
|
dsl_pool_ds_destroyed(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
|
|
if (dp->dp_scrub_func == SCRUB_FUNC_NONE)
|
|
return;
|
|
|
|
if (dp->dp_scrub_bookmark.zb_objset == ds->ds_object) {
|
|
SET_BOOKMARK(&dp->dp_scrub_bookmark, -1, 0, 0, 0);
|
|
} else if (zap_remove_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds->ds_object, tx) != 0) {
|
|
return;
|
|
}
|
|
|
|
if (ds->ds_phys->ds_next_snap_obj != 0) {
|
|
VERIFY(zap_add_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds->ds_phys->ds_next_snap_obj, tx) == 0);
|
|
}
|
|
ASSERT3U(ds->ds_phys->ds_num_children, <=, 1);
|
|
}
|
|
|
|
void
|
|
dsl_pool_ds_snapshotted(dsl_dataset_t *ds, dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp = ds->ds_dir->dd_pool;
|
|
|
|
if (dp->dp_scrub_func == SCRUB_FUNC_NONE)
|
|
return;
|
|
|
|
ASSERT(ds->ds_phys->ds_prev_snap_obj != 0);
|
|
|
|
if (dp->dp_scrub_bookmark.zb_objset == ds->ds_object) {
|
|
dp->dp_scrub_bookmark.zb_objset =
|
|
ds->ds_phys->ds_prev_snap_obj;
|
|
} else if (zap_remove_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds->ds_object, tx) == 0) {
|
|
VERIFY(zap_add_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds->ds_phys->ds_prev_snap_obj, tx) == 0);
|
|
}
|
|
}
|
|
|
|
void
|
|
dsl_pool_ds_clone_swapped(dsl_dataset_t *ds1, dsl_dataset_t *ds2, dmu_tx_t *tx)
|
|
{
|
|
dsl_pool_t *dp = ds1->ds_dir->dd_pool;
|
|
|
|
if (dp->dp_scrub_func == SCRUB_FUNC_NONE)
|
|
return;
|
|
|
|
if (dp->dp_scrub_bookmark.zb_objset == ds1->ds_object) {
|
|
dp->dp_scrub_bookmark.zb_objset = ds2->ds_object;
|
|
} else if (dp->dp_scrub_bookmark.zb_objset == ds2->ds_object) {
|
|
dp->dp_scrub_bookmark.zb_objset = ds1->ds_object;
|
|
}
|
|
|
|
if (zap_remove_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds1->ds_object, tx) == 0) {
|
|
int err = zap_add_int(dp->dp_meta_objset,
|
|
dp->dp_scrub_queue_obj, ds2->ds_object, tx);
|
|
VERIFY(err == 0 || err == EEXIST);
|
|
if (err == EEXIST) {
|
|
/* Both were there to begin with */
|
|
VERIFY(0 == zap_add_int(dp->dp_meta_objset,
|
|
dp->dp_scrub_queue_obj, ds1->ds_object, tx));
|
|
}
|
|
} else if (zap_remove_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds2->ds_object, tx) == 0) {
|
|
VERIFY(0 == zap_add_int(dp->dp_meta_objset,
|
|
dp->dp_scrub_queue_obj, ds1->ds_object, tx));
|
|
}
|
|
}
|
|
|
|
struct enqueue_clones_arg {
|
|
dmu_tx_t *tx;
|
|
uint64_t originobj;
|
|
};
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
enqueue_clones_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
|
|
{
|
|
struct enqueue_clones_arg *eca = arg;
|
|
dsl_dataset_t *ds;
|
|
int err;
|
|
dsl_pool_t *dp;
|
|
|
|
err = dsl_dataset_hold_obj(spa->spa_dsl_pool, dsobj, FTAG, &ds);
|
|
if (err)
|
|
return (err);
|
|
dp = ds->ds_dir->dd_pool;
|
|
|
|
if (ds->ds_dir->dd_phys->dd_origin_obj == eca->originobj) {
|
|
while (ds->ds_phys->ds_prev_snap_obj != eca->originobj) {
|
|
dsl_dataset_t *prev;
|
|
err = dsl_dataset_hold_obj(dp,
|
|
ds->ds_phys->ds_prev_snap_obj, FTAG, &prev);
|
|
|
|
dsl_dataset_rele(ds, FTAG);
|
|
if (err)
|
|
return (err);
|
|
ds = prev;
|
|
}
|
|
VERIFY(zap_add_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds->ds_object, eca->tx) == 0);
|
|
}
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
scrub_visitds(dsl_pool_t *dp, uint64_t dsobj, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_t *ds;
|
|
uint64_t min_txg_save;
|
|
|
|
VERIFY3U(0, ==, dsl_dataset_hold_obj(dp, dsobj, FTAG, &ds));
|
|
|
|
/*
|
|
* Iterate over the bps in this ds.
|
|
*/
|
|
min_txg_save = dp->dp_scrub_min_txg;
|
|
dp->dp_scrub_min_txg =
|
|
MAX(dp->dp_scrub_min_txg, ds->ds_phys->ds_prev_snap_txg);
|
|
scrub_visit_rootbp(dp, ds, &ds->ds_phys->ds_bp);
|
|
dp->dp_scrub_min_txg = min_txg_save;
|
|
|
|
if (dp->dp_scrub_pausing)
|
|
goto out;
|
|
|
|
/*
|
|
* Add descendent datasets to work queue.
|
|
*/
|
|
if (ds->ds_phys->ds_next_snap_obj != 0) {
|
|
VERIFY(zap_add_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds->ds_phys->ds_next_snap_obj, tx) == 0);
|
|
}
|
|
if (ds->ds_phys->ds_num_children > 1) {
|
|
if (spa_version(dp->dp_spa) < SPA_VERSION_DSL_SCRUB) {
|
|
struct enqueue_clones_arg eca;
|
|
eca.tx = tx;
|
|
eca.originobj = ds->ds_object;
|
|
|
|
(void) dmu_objset_find_spa(ds->ds_dir->dd_pool->dp_spa,
|
|
NULL, enqueue_clones_cb, &eca, DS_FIND_CHILDREN);
|
|
} else {
|
|
VERIFY(zap_join(dp->dp_meta_objset,
|
|
ds->ds_phys->ds_next_clones_obj,
|
|
dp->dp_scrub_queue_obj, tx) == 0);
|
|
}
|
|
}
|
|
|
|
out:
|
|
dsl_dataset_rele(ds, FTAG);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
enqueue_cb(spa_t *spa, uint64_t dsobj, const char *dsname, void *arg)
|
|
{
|
|
dmu_tx_t *tx = arg;
|
|
dsl_dataset_t *ds;
|
|
int err;
|
|
dsl_pool_t *dp;
|
|
|
|
err = dsl_dataset_hold_obj(spa->spa_dsl_pool, dsobj, FTAG, &ds);
|
|
if (err)
|
|
return (err);
|
|
|
|
dp = ds->ds_dir->dd_pool;
|
|
|
|
while (ds->ds_phys->ds_prev_snap_obj != 0) {
|
|
dsl_dataset_t *prev;
|
|
err = dsl_dataset_hold_obj(dp, ds->ds_phys->ds_prev_snap_obj,
|
|
FTAG, &prev);
|
|
if (err) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* If this is a clone, we don't need to worry about it for now.
|
|
*/
|
|
if (prev->ds_phys->ds_next_snap_obj != ds->ds_object) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
dsl_dataset_rele(prev, FTAG);
|
|
return (0);
|
|
}
|
|
dsl_dataset_rele(ds, FTAG);
|
|
ds = prev;
|
|
}
|
|
|
|
VERIFY(zap_add_int(dp->dp_meta_objset, dp->dp_scrub_queue_obj,
|
|
ds->ds_object, tx) == 0);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (0);
|
|
}
|
|
|
|
void
|
|
dsl_pool_scrub_sync(dsl_pool_t *dp, dmu_tx_t *tx)
|
|
{
|
|
spa_t *spa = dp->dp_spa;
|
|
zap_cursor_t zc;
|
|
zap_attribute_t za;
|
|
boolean_t complete = B_TRUE;
|
|
|
|
if (dp->dp_scrub_func == SCRUB_FUNC_NONE)
|
|
return;
|
|
|
|
/*
|
|
* If the pool is not loaded, or is trying to unload, leave it alone.
|
|
*/
|
|
if (spa->spa_load_state != SPA_LOAD_NONE || spa_shutting_down(spa))
|
|
return;
|
|
|
|
if (dp->dp_scrub_restart) {
|
|
enum scrub_func func = dp->dp_scrub_func;
|
|
dp->dp_scrub_restart = B_FALSE;
|
|
dsl_pool_scrub_setup_sync(dp, &func, kcred, tx);
|
|
}
|
|
|
|
if (spa->spa_root_vdev->vdev_stat.vs_scrub_type == 0) {
|
|
/*
|
|
* We must have resumed after rebooting; reset the vdev
|
|
* stats to know that we're doing a scrub (although it
|
|
* will think we're just starting now).
|
|
*/
|
|
vdev_scrub_stat_update(spa->spa_root_vdev,
|
|
dp->dp_scrub_min_txg ? POOL_SCRUB_RESILVER :
|
|
POOL_SCRUB_EVERYTHING, B_FALSE);
|
|
}
|
|
|
|
dp->dp_scrub_pausing = B_FALSE;
|
|
dp->dp_scrub_start_time = lbolt64;
|
|
dp->dp_scrub_isresilver = (dp->dp_scrub_min_txg != 0);
|
|
spa->spa_scrub_active = B_TRUE;
|
|
|
|
if (dp->dp_scrub_bookmark.zb_objset == 0) {
|
|
/* First do the MOS & ORIGIN */
|
|
scrub_visit_rootbp(dp, NULL, &dp->dp_meta_rootbp);
|
|
if (dp->dp_scrub_pausing)
|
|
goto out;
|
|
|
|
if (spa_version(spa) < SPA_VERSION_DSL_SCRUB) {
|
|
VERIFY(0 == dmu_objset_find_spa(spa,
|
|
NULL, enqueue_cb, tx, DS_FIND_CHILDREN));
|
|
} else {
|
|
scrub_visitds(dp, dp->dp_origin_snap->ds_object, tx);
|
|
}
|
|
ASSERT(!dp->dp_scrub_pausing);
|
|
} else if (dp->dp_scrub_bookmark.zb_objset != -1ULL) {
|
|
/*
|
|
* If we were paused, continue from here. Note if the
|
|
* ds we were paused on was deleted, the zb_objset will
|
|
* be -1, so we will skip this and find a new objset
|
|
* below.
|
|
*/
|
|
scrub_visitds(dp, dp->dp_scrub_bookmark.zb_objset, tx);
|
|
if (dp->dp_scrub_pausing)
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* In case we were paused right at the end of the ds, zero the
|
|
* bookmark so we don't think that we're still trying to resume.
|
|
*/
|
|
bzero(&dp->dp_scrub_bookmark, sizeof (zbookmark_t));
|
|
|
|
/* keep pulling things out of the zap-object-as-queue */
|
|
while (zap_cursor_init(&zc, dp->dp_meta_objset, dp->dp_scrub_queue_obj),
|
|
zap_cursor_retrieve(&zc, &za) == 0) {
|
|
VERIFY(0 == zap_remove(dp->dp_meta_objset,
|
|
dp->dp_scrub_queue_obj, za.za_name, tx));
|
|
scrub_visitds(dp, za.za_first_integer, tx);
|
|
if (dp->dp_scrub_pausing)
|
|
break;
|
|
zap_cursor_fini(&zc);
|
|
}
|
|
zap_cursor_fini(&zc);
|
|
if (dp->dp_scrub_pausing)
|
|
goto out;
|
|
|
|
/* done. */
|
|
|
|
dsl_pool_scrub_cancel_sync(dp, &complete, kcred, tx);
|
|
return;
|
|
out:
|
|
VERIFY(0 == zap_update(dp->dp_meta_objset,
|
|
DMU_POOL_DIRECTORY_OBJECT,
|
|
DMU_POOL_SCRUB_BOOKMARK, sizeof (uint64_t), 4,
|
|
&dp->dp_scrub_bookmark, tx));
|
|
VERIFY(0 == zap_update(dp->dp_meta_objset,
|
|
DMU_POOL_DIRECTORY_OBJECT,
|
|
DMU_POOL_SCRUB_ERRORS, sizeof (uint64_t), 1,
|
|
&spa->spa_scrub_errors, tx));
|
|
|
|
/* XXX this is scrub-clean specific */
|
|
mutex_enter(&spa->spa_scrub_lock);
|
|
while (spa->spa_scrub_inflight > 0)
|
|
cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
|
|
mutex_exit(&spa->spa_scrub_lock);
|
|
}
|
|
|
|
void
|
|
dsl_pool_scrub_restart(dsl_pool_t *dp)
|
|
{
|
|
mutex_enter(&dp->dp_scrub_cancel_lock);
|
|
dp->dp_scrub_restart = B_TRUE;
|
|
mutex_exit(&dp->dp_scrub_cancel_lock);
|
|
}
|
|
|
|
/*
|
|
* scrub consumers
|
|
*/
|
|
|
|
static void
|
|
count_block(zfs_all_blkstats_t *zab, const blkptr_t *bp)
|
|
{
|
|
int i;
|
|
|
|
/*
|
|
* If we resume after a reboot, zab will be NULL; don't record
|
|
* incomplete stats in that case.
|
|
*/
|
|
if (zab == NULL)
|
|
return;
|
|
|
|
for (i = 0; i < 4; i++) {
|
|
int l = (i < 2) ? BP_GET_LEVEL(bp) : DN_MAX_LEVELS;
|
|
int t = (i & 1) ? BP_GET_TYPE(bp) : DMU_OT_TOTAL;
|
|
zfs_blkstat_t *zb = &zab->zab_type[l][t];
|
|
int equal;
|
|
|
|
zb->zb_count++;
|
|
zb->zb_asize += BP_GET_ASIZE(bp);
|
|
zb->zb_lsize += BP_GET_LSIZE(bp);
|
|
zb->zb_psize += BP_GET_PSIZE(bp);
|
|
zb->zb_gangs += BP_COUNT_GANG(bp);
|
|
|
|
switch (BP_GET_NDVAS(bp)) {
|
|
case 2:
|
|
if (DVA_GET_VDEV(&bp->blk_dva[0]) ==
|
|
DVA_GET_VDEV(&bp->blk_dva[1]))
|
|
zb->zb_ditto_2_of_2_samevdev++;
|
|
break;
|
|
case 3:
|
|
equal = (DVA_GET_VDEV(&bp->blk_dva[0]) ==
|
|
DVA_GET_VDEV(&bp->blk_dva[1])) +
|
|
(DVA_GET_VDEV(&bp->blk_dva[0]) ==
|
|
DVA_GET_VDEV(&bp->blk_dva[2])) +
|
|
(DVA_GET_VDEV(&bp->blk_dva[1]) ==
|
|
DVA_GET_VDEV(&bp->blk_dva[2]));
|
|
if (equal == 1)
|
|
zb->zb_ditto_2_of_3_samevdev++;
|
|
else if (equal == 3)
|
|
zb->zb_ditto_3_of_3_samevdev++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
dsl_pool_scrub_clean_done(zio_t *zio)
|
|
{
|
|
spa_t *spa = zio->io_spa;
|
|
|
|
zio_data_buf_free(zio->io_data, zio->io_size);
|
|
|
|
mutex_enter(&spa->spa_scrub_lock);
|
|
spa->spa_scrub_inflight--;
|
|
cv_broadcast(&spa->spa_scrub_io_cv);
|
|
|
|
if (zio->io_error && (zio->io_error != ECKSUM ||
|
|
!(zio->io_flags & ZIO_FLAG_SPECULATIVE)))
|
|
spa->spa_scrub_errors++;
|
|
mutex_exit(&spa->spa_scrub_lock);
|
|
}
|
|
|
|
static int
|
|
dsl_pool_scrub_clean_cb(dsl_pool_t *dp,
|
|
const blkptr_t *bp, const zbookmark_t *zb)
|
|
{
|
|
size_t size = BP_GET_PSIZE(bp);
|
|
spa_t *spa = dp->dp_spa;
|
|
boolean_t needs_io;
|
|
int zio_flags = ZIO_FLAG_SCRUB_THREAD | ZIO_FLAG_RAW | ZIO_FLAG_CANFAIL;
|
|
int zio_priority;
|
|
int d;
|
|
|
|
ASSERT(bp->blk_birth > dp->dp_scrub_min_txg);
|
|
|
|
if (bp->blk_birth >= dp->dp_scrub_max_txg)
|
|
return (0);
|
|
|
|
count_block(dp->dp_blkstats, bp);
|
|
|
|
if (dp->dp_scrub_isresilver == 0) {
|
|
/* It's a scrub */
|
|
zio_flags |= ZIO_FLAG_SCRUB;
|
|
zio_priority = ZIO_PRIORITY_SCRUB;
|
|
needs_io = B_TRUE;
|
|
} else {
|
|
/* It's a resilver */
|
|
zio_flags |= ZIO_FLAG_RESILVER;
|
|
zio_priority = ZIO_PRIORITY_RESILVER;
|
|
needs_io = B_FALSE;
|
|
}
|
|
|
|
/* If it's an intent log block, failure is expected. */
|
|
if (zb->zb_level == -1 && BP_GET_TYPE(bp) != DMU_OT_OBJSET)
|
|
zio_flags |= ZIO_FLAG_SPECULATIVE;
|
|
|
|
for (d = 0; d < BP_GET_NDVAS(bp); d++) {
|
|
vdev_t *vd = vdev_lookup_top(spa,
|
|
DVA_GET_VDEV(&bp->blk_dva[d]));
|
|
|
|
/*
|
|
* Keep track of how much data we've examined so that
|
|
* zpool(1M) status can make useful progress reports.
|
|
*/
|
|
mutex_enter(&vd->vdev_stat_lock);
|
|
vd->vdev_stat.vs_scrub_examined +=
|
|
DVA_GET_ASIZE(&bp->blk_dva[d]);
|
|
mutex_exit(&vd->vdev_stat_lock);
|
|
|
|
/* if it's a resilver, this may not be in the target range */
|
|
if (!needs_io) {
|
|
if (DVA_GET_GANG(&bp->blk_dva[d])) {
|
|
/*
|
|
* Gang members may be spread across multiple
|
|
* vdevs, so the best estimate we have is the
|
|
* scrub range, which has already been checked.
|
|
* XXX -- it would be better to change our
|
|
* allocation policy to ensure that all
|
|
* gang members reside on the same vdev.
|
|
*/
|
|
needs_io = B_TRUE;
|
|
} else {
|
|
needs_io = vdev_dtl_contains(vd, DTL_PARTIAL,
|
|
bp->blk_birth, 1);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (needs_io && !zfs_no_scrub_io) {
|
|
void *data = zio_data_buf_alloc(size);
|
|
|
|
mutex_enter(&spa->spa_scrub_lock);
|
|
while (spa->spa_scrub_inflight >= spa->spa_scrub_maxinflight)
|
|
cv_wait(&spa->spa_scrub_io_cv, &spa->spa_scrub_lock);
|
|
spa->spa_scrub_inflight++;
|
|
mutex_exit(&spa->spa_scrub_lock);
|
|
|
|
zio_nowait(zio_read(NULL, spa, bp, data, size,
|
|
dsl_pool_scrub_clean_done, NULL, zio_priority,
|
|
zio_flags, zb));
|
|
}
|
|
|
|
/* do not relocate this block */
|
|
return (0);
|
|
}
|
|
|
|
int
|
|
dsl_pool_scrub_clean(dsl_pool_t *dp)
|
|
{
|
|
/*
|
|
* Purge all vdev caches. We do this here rather than in sync
|
|
* context because this requires a writer lock on the spa_config
|
|
* lock, which we can't do from sync context. The
|
|
* spa_scrub_reopen flag indicates that vdev_open() should not
|
|
* attempt to start another scrub.
|
|
*/
|
|
spa_config_enter(dp->dp_spa, SCL_ALL, FTAG, RW_WRITER);
|
|
dp->dp_spa->spa_scrub_reopen = B_TRUE;
|
|
vdev_reopen(dp->dp_spa->spa_root_vdev);
|
|
dp->dp_spa->spa_scrub_reopen = B_FALSE;
|
|
spa_config_exit(dp->dp_spa, SCL_ALL, FTAG);
|
|
|
|
return (dsl_pool_scrub_setup(dp, SCRUB_FUNC_CLEAN));
|
|
}
|