diff options
Diffstat (limited to 'drivers/md/dm.h')
| -rw-r--r-- | drivers/md/dm.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/md/dm.h b/drivers/md/dm.h index 8dcabb1caff..a7663eba17e 100644 --- a/drivers/md/dm.h +++ b/drivers/md/dm.h @@ -23,6 +23,13 @@ #define DM_SUSPEND_NOFLUSH_FLAG (1 << 1) /* + * 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 + +/* * List of devices that a metadevice uses and should open/close. */ struct dm_dev_internal { @@ -32,6 +39,7 @@ struct dm_dev_internal { }; struct dm_table; +struct dm_md_mempools; /*----------------------------------------------------------------- * Internal table functions. @@ -51,12 +59,23 @@ void dm_table_postsuspend_targets(struct dm_table *t); int dm_table_resume_targets(struct dm_table *t); int dm_table_any_congested(struct dm_table *t, int bdi_bits); int dm_table_any_busy_target(struct dm_table *t); +int dm_table_set_type(struct dm_table *t); +unsigned dm_table_get_type(struct dm_table *t); +bool dm_table_request_based(struct dm_table *t); +int dm_table_alloc_md_mempools(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); /* * To check the return value from dm_table_find_target(). */ #define dm_target_is_valid(t) ((t)->table) +/* + * To check whether the target type is request-based or not (bio-based). + */ +#define dm_target_request_based(t) ((t)->type->map_rq != NULL) + /*----------------------------------------------------------------- * A registry of target types. *---------------------------------------------------------------*/ @@ -102,4 +121,10 @@ void dm_kobject_uevent(struct mapped_device *md, enum kobject_action action, int dm_kcopyd_init(void); void dm_kcopyd_exit(void); +/* + * Mempool operations + */ +struct dm_md_mempools *dm_alloc_md_mempools(unsigned type); +void dm_free_md_mempools(struct dm_md_mempools *pools); + #endif |