block: Add a disk flag to block integrity profile

So far we have relied on the app tag size to determine whether a disk
has been formatted with T10 protection information or not. However, not
all target devices provide application tag storage.

Add a flag to the block integrity profile that indicates whether the
disk has been formatted with protection information.

Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Sagi Grimberg <sagig@dev.mellanox.co.il>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index cf92eb031ae9..4600fc63e3fc 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1461,6 +1461,7 @@ static inline uint64_t rq_io_start_time_ns(struct request *req)
 enum blk_integrity_flags {
         BLK_INTEGRITY_VERIFY            = 1 << 0,
         BLK_INTEGRITY_GENERATE          = 1 << 1,
+        BLK_INTEGRITY_DEVICE_CAPABLE    = 1 << 2,
 };
 
 struct blk_integrity_iter {