dm table: add flag to allow target to handle its own integrity metadata
Add DM_TARGET_INTEGRITY flag that specifies bio integrity metadata is
not inherited but implemented in the target itself.
Signed-off-by: Milan Broz <gmazyland@gmail.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index a7e6903..87446215 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -221,6 +221,12 @@ 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)
+
struct dm_target {
struct dm_table *table;
struct target_type *type;