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| author | Mike Snitzer <snitzer@redhat.com> | 2016-05-25 01:16:51 (GMT) |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-06-10 19:16:02 (GMT) |
| commit | e83068a5faafb8ca65d3b58bd1e1e3959ce1ddce (patch) | |
| tree | 9158ec7acad94d7035153f84e8ff53205caf7315 /drivers/md/dm.h | |
| parent | bf661be1fcf9b1da8abc81a56ff41ce5964ce896 (diff) | |
| download | linux-e83068a5faafb8ca65d3b58bd1e1e3959ce1ddce.tar.xz | |
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.h')
| -rw-r--r-- | drivers/md/dm.h | 10 |
1 files changed, 1 insertions, 9 deletions
diff --git a/drivers/md/dm.h b/drivers/md/dm.h index b611b30..2e0e4a5 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -34,14 +34,6 @@ #define DM_STATUS_NOFLUSH_FLAG (1 << 0) /* - * Type of table and mapped_device's mempool - */ -#define DM_TYPE_NONE 0 -#define DM_TYPE_BIO_BASED 1 -#define DM_TYPE_REQUEST_BASED 2 -#define DM_TYPE_MQ_REQUEST_BASED 3 - -/* * List of devices that a metadevice uses and should open/close. */ struct dm_dev_internal { @@ -77,7 +69,7 @@ struct target_type *dm_table_get_immutable_target_type(struct dm_table *t); struct dm_target *dm_table_get_immutable_target(struct dm_table *t); struct dm_target *dm_table_get_wildcard_target(struct dm_table *t); bool dm_table_request_based(struct dm_table *t); -bool dm_table_mq_request_based(struct dm_table *t); +bool dm_table_all_blk_mq_devices(struct dm_table *t); void dm_table_free_md_mempools(struct dm_table *t); struct dm_md_mempools *dm_table_get_md_mempools(struct dm_table *t); |