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authorMike Snitzer <snitzer@redhat.com>2016-05-24 21:16:51 -0400
committerMike Snitzer <snitzer@redhat.com>2016-06-10 15:16:02 -0400
commite83068a5faafb8ca65d3b58bd1e1e3959ce1ddce (patch)
tree9158ec7acad94d7035153f84e8ff53205caf7315 /drivers/md/dm-rq.h
parentbf661be1fcf9b1da8abc81a56ff41ce5964ce896 (diff)
dm mpath: add optional "queue_mode" feature
Allow a user to specify an optional feature 'queue_mode <mode>' where <mode> may be "bio", "rq" or "mq" -- which corresponds to bio-based, request_fn rq-based, and blk-mq rq-based respectively. If the queue_mode feature isn't specified the default for the "multipath" target is still "rq" but if dm_mod.use_blk_mq is set to Y it'll default to mode "mq". This new queue_mode feature introduces the ability for each multipath device to have its own queue_mode (whereas before this feature all multipath devices effectively had to have the same queue_mode). This commit also goes a long way to eliminate the awkward (ab)use of DM_TYPE_*, the associated filter_md_type() and other relatively fragile and difficult to maintain code. Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-rq.h')
-rw-r--r--drivers/md/dm-rq.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-rq.h b/drivers/md/dm-rq.h
index 1559f6486024..9e6f0a3773d4 100644
--- a/drivers/md/dm-rq.h
+++ b/drivers/md/dm-rq.h
@@ -49,7 +49,7 @@ bool dm_use_blk_mq_default(void);
bool dm_use_blk_mq(struct mapped_device *md);
int dm_old_init_request_queue(struct mapped_device *md);
-int dm_mq_init_request_queue(struct mapped_device *md, struct dm_target *immutable_tgt);
+int dm_mq_init_request_queue(struct mapped_device *md, struct dm_table *t);
void dm_mq_cleanup_mapped_device(struct mapped_device *md);
void dm_start_queue(struct request_queue *q);