Commit 301fc3f5 authored Dec 07, 2016 by Bart Van Assche Committed by Mike Snitzer Dec 08, 2016

dm table: an 'all_blk_mq' table must be loaded for a blk-mq DM device



When dm_table_set_type() is used by a target to establish a DM table's
type (e.g. DM_TYPE_MQ_REQUEST_BASED in the case of DM multipath) the
DM core must go on to verify that the devices in the table are
compatible with the established type.

Fixes: e83068a5 ("dm mpath: add optional "queue_mode" feature")
Cc: stable@vger.kernel.org # 4.8+
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

parent 6936c12c

drivers/md/dm-table.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -981,6 +981,11 @@ verify_rq_based:
		t->all_blk_mq = true;
		}

		if (t->type == DM_TYPE_MQ_REQUEST_BASED && !t->all_blk_mq) {
		DMERR("table load rejected: all devices are not blk-mq request-stackable");
		return -EINVAL;
		}

		return 0;
		}

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