diff options
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 2ce339212b6e..b0db857f334b 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -26,6 +26,7 @@ struct bio_vec; #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 typedef enum { STATUSTYPE_INFO, STATUSTYPE_TABLE } status_type_t; @@ -124,6 +125,14 @@ typedef void (*dm_io_hints_fn) (struct dm_target *ti, */ typedef int (*dm_busy_fn) (struct dm_target *ti); +/* + * Returns: + * < 0 : error + * >= 0 : the number of bytes accessible at the address + */ +typedef long (*dm_direct_access_fn) (struct dm_target *ti, sector_t sector, + void __pmem **kaddr, pfn_t *pfn, long size); + void dm_error(const char *message); struct dm_dev { @@ -170,6 +179,7 @@ struct target_type { dm_busy_fn busy; dm_iterate_devices_fn iterate_devices; dm_io_hints_fn io_hints; + dm_direct_access_fn direct_access; /* For internal device-mapper use. */ struct list_head list; |