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dm table: add flag to allow target to handle its own integrity metadata

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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>
This commit is contained in:
Milan Broz 2017-01-04 20:23:51 +01:00 • committed by Mike Snitzer
parent b29d4986d0
commit 9b4b5a797c
2 changed files with 17 additions and 0 deletions
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6
include/linux/device-mapper.h
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@ -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;