diff options
Diffstat (limited to 'include/linux/device-mapper.h')
| -rw-r--r-- | include/linux/device-mapper.h | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index a7e6903866fd..78ad0624cdae 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -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; @@ -221,6 +223,18 @@ struct target_type { */ typedef unsigned (*dm_num_write_bios_fn) (struct dm_target *ti, struct bio *bio); +/* + * A target implements own bio data integrity. + */ +#define DM_TARGET_INTEGRITY 0x00000010 +#define dm_target_has_integrity(type) ((type)->features & DM_TARGET_INTEGRITY) + +/* + * A target passes integrity data to the lower device. + */ +#define DM_TARGET_PASSES_INTEGRITY 0x00000020 +#define dm_target_passes_integrity(type) ((type)->features & DM_TARGET_PASSES_INTEGRITY) + struct dm_target { struct dm_table *table; struct target_type *type; @@ -255,6 +269,12 @@ struct dm_target { unsigned num_write_same_bios; /* + * The number of WRITE ZEROES bios that will be submitted to the target. + * The bio number can be accessed with dm_bio_get_target_bio_nr. + */ + unsigned num_write_zeroes_bios; + + /* * The minimum number of extra bytes allocated in each io for the * target to use. */ @@ -290,11 +310,6 @@ struct dm_target { * on max_io_len boundary. */ bool split_discard_bios:1; - - /* - * Set if this target does not return zeroes on discarded blocks. - */ - bool discard_zeroes_data_unsupported:1; }; /* Each target can link one of these into the table */ @@ -464,7 +479,7 @@ 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. @@ -578,6 +593,7 @@ extern struct ratelimit_state dm_ratelimit_state; /* * Definitions of return values from target end_io function. */ +#define DM_ENDIO_DONE 0 #define DM_ENDIO_INCOMPLETE 1 #define DM_ENDIO_REQUEUE 2 @@ -588,6 +604,7 @@ extern struct ratelimit_state dm_ratelimit_state; #define DM_MAPIO_REMAPPED 1 #define DM_MAPIO_REQUEUE DM_ENDIO_REQUEUE #define DM_MAPIO_DELAY_REQUEUE 3 +#define DM_MAPIO_KILL 4 #define dm_sector_div64(x, y)( \ { \ |