Commit 1b17159e authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm bio record: save/restore bi_end_io and bi_integrity 



Also, save/restore __bi_remaining in case the bio was used in a
BIO_CHAIN (e.g. due to blk_queue_split).

Suggested-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent ee63634b

drivers/md/dm-bio-record.h

+15 −0
Original line number Diff line number Diff line
@@ -20,8 +20,13 @@ 
struct dm_bio_details {

	struct gendisk *bi_disk;

	u8 bi_partno;

	int __bi_remaining;

	unsigned long bi_flags;

	struct bvec_iter bi_iter;

	bio_end_io_t *bi_end_io;

#if defined(CONFIG_BLK_DEV_INTEGRITY)

	struct bio_integrity_payload *bi_integrity;

#endif

};



static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio)
@@ -30,6 +35,11 @@ static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) 
	bd->bi_partno = bio->bi_partno;

	bd->bi_flags = bio->bi_flags;

	bd->bi_iter = bio->bi_iter;

	bd->__bi_remaining = atomic_read(&bio->__bi_remaining);

	bd->bi_end_io = bio->bi_end_io;

#if defined(CONFIG_BLK_DEV_INTEGRITY)

	bd->bi_integrity = bio_integrity(bio);

#endif

}



static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio)
@@ -38,6 +48,11 @@ static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) 
	bio->bi_partno = bd->bi_partno;

	bio->bi_flags = bd->bi_flags;

	bio->bi_iter = bd->bi_iter;

	atomic_set(&bio->__bi_remaining, bd->__bi_remaining);

	bio->bi_end_io = bd->bi_end_io;

#if defined(CONFIG_BLK_DEV_INTEGRITY)

	bio->bi_integrity = bd->bi_integrity;

#endif

}



#endif