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| author | Bart Van Assche <bart.vanassche@sandisk.com> | 2016-12-07 16:56:06 -0800 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-12-08 14:12:53 -0500 |
| commit | 301fc3f5efb98633115bd887655b19f42c6dfaa8 (patch) | |
| tree | 90b04d442a6e3ef5435730e16ade9eaa43a2acd7 /drivers/md/dm-table.c | |
| parent | 6936c12cf809850180b24947271b8f068fdb15e9 (diff) | |
| download | lwn-301fc3f5efb98633115bd887655b19f42c6dfaa8.tar.gz lwn-301fc3f5efb98633115bd887655b19f42c6dfaa8.zip | |
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>
Diffstat (limited to 'drivers/md/dm-table.c')
| -rw-r--r-- | drivers/md/dm-table.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm-table.c b/drivers/md/dm-table.c index 53b817b29134..5ac239d0f787 100644 --- a/drivers/md/dm-table.c +++ b/drivers/md/dm-table.c @@ -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; } |