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dm: introduce enum dm_queue_mode to cleanup related code

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Introduce an enumeration type for the queue mode.  This patch does
not change any functionality but makes the DM code easier to read.

Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Bart Van Assche 2017-04-27 10:11:23 -07:00 • committed by Mike Snitzer
parent b194679fac
commit 7e0d574f26
7 changed files with 32 additions and 24 deletions
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14
include/linux/device-mapper.h
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@ -22,11 +22,13 @@ struct bio_vec;
/*
* Type of table, mapped_device's mempool and request_queue
*/
#define DM_TYPE_NONE 0
#define DM_TYPE_BIO_BASED 1
#define DM_TYPE_REQUEST_BASED 2
#define DM_TYPE_MQ_REQUEST_BASED 3
#define DM_TYPE_DAX_BIO_BASED 4
enum dm_queue_mode {
DM_TYPE_NONE = 0,
DM_TYPE_BIO_BASED = 1,
DM_TYPE_REQUEST_BASED = 2,
DM_TYPE_MQ_REQUEST_BASED = 3,
DM_TYPE_DAX_BIO_BASED = 4,
};
typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t;
@ -476,7 +478,7 @@ void dm_table_add_target_callbacks(struct dm_table *t, struct dm_target_callback
* Useful for "hybrid" target (supports both bio-based
* and request-based).
*/
void dm_table_set_type(struct dm_table *t, unsigned type);
void dm_table_set_type(struct dm_table *t, enum dm_queue_mode type);
/*
* Finally call this to make the table ready for use.