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

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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>
This commit is contained in:
Bart Van Assche 2016-12-07 16:56:06 -08:00 committed by Mike Snitzer
parent 6936c12cf8
commit 301fc3f5ef
1 changed files with 5 additions and 0 deletions
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5
drivers/md/dm-table.c
View file

@ -981,6 +981,11 @@ static int dm_table_determine_type(struct dm_table *t)
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;
}