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Fix race between resilver wait and offline/detach

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We should not clear scn_state and notify waiters until we call
vdev_dtl_reassess(), otherwise following offline/detach request
may fail with "no valid replicas".

Signed-off-by:	Alexander Motin <mav@FreeBSD.org>
Sponsored by:	iXsystems, Inc.
(cherry picked from commit f86d9af16b)
This commit is contained in:
Alexander Motin 2025-04-24 13:30:16 -04:00 committed by Tony Hutter
parent a2593c1610
commit 101edf7ed9
1 changed files with 8 additions and 5 deletions
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13
module/zfs/dsl_scan.c
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@ -1132,10 +1132,6 @@ dsl_scan_done(dsl_scan_t *scn, boolean_t complete, dmu_tx_t *tx)
}
}
scn->scn_phys.scn_state = complete ? DSS_FINISHED : DSS_CANCELED;
spa_notify_waiters(spa);
if (dsl_scan_restarting(scn, tx)) {
spa_history_log_internal(spa, "scan aborted, restarting", tx,
"errors=%llu", (u_longlong_t)spa_approx_errlog_size(spa));
@ -1194,6 +1190,9 @@ dsl_scan_done(dsl_scan_t *scn, boolean_t complete, dmu_tx_t *tx)
* Don't clear flag until after vdev_dtl_reassess to ensure that
* DTL_MISSING will get updated when possible.
*/
scn->scn_phys.scn_state = complete ? DSS_FINISHED :
DSS_CANCELED;
scn->scn_phys.scn_end_time = gethrestime_sec();
spa->spa_scrub_started = B_FALSE;
/*
@ -1223,9 +1222,13 @@ dsl_scan_done(dsl_scan_t *scn, boolean_t complete, dmu_tx_t *tx)
/* Clear recent error events (i.e. duplicate events tracking) */
if (complete)
zfs_ereport_clear(spa, NULL);
} else {
scn->scn_phys.scn_state = complete ? DSS_FINISHED :
DSS_CANCELED;
scn->scn_phys.scn_end_time = gethrestime_sec();
}
scn->scn_phys.scn_end_time = gethrestime_sec();
spa_notify_waiters(spa);
if (spa->spa_errata == ZPOOL_ERRATA_ZOL_2094_SCRUB)
spa->spa_errata = 0;