Commit 6845de78 authored by John Garry's avatar John Garry Committed by Mikulas Patocka
Browse files

dm-mirror: Support atomic writes 



Support atomic writes by setting DM_TARGET_ATOMIC_WRITES for the target
type, and also unmasking REQ_ATOMIC from the submitted bio op flags.

Signed-off-by: default avatarJohn Garry <john.g.garry@oracle.com>
Reviewed-by: default avatarMike Snitzer <snitzer@kernel.org>
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
parent c6a657d9

drivers/md/dm-raid1.c

+3 −2
Original line number Diff line number Diff line
@@ -656,7 +656,7 @@ static void do_write(struct mirror_set *ms, struct bio *bio) 
	unsigned int i;

	struct dm_io_region io[MAX_NR_MIRRORS], *dest = io;

	struct mirror *m;

	blk_opf_t op_flags = bio->bi_opf & (REQ_FUA | REQ_PREFLUSH);

	blk_opf_t op_flags = bio->bi_opf & (REQ_FUA | REQ_PREFLUSH | REQ_ATOMIC);

	struct dm_io_request io_req = {

		.bi_opf = REQ_OP_WRITE | op_flags,

		.mem.type = DM_IO_BIO,
@@ -1483,8 +1483,9 @@ static int mirror_iterate_devices(struct dm_target *ti, 


static struct target_type mirror_target = {

	.name	 = "mirror",

	.version = {1, 14, 0},

	.version = {1, 15, 0},

	.module	 = THIS_MODULE,

	.features = DM_TARGET_ATOMIC_WRITES,

	.ctr	 = mirror_ctr,

	.dtr	 = mirror_dtr,

	.map	 = mirror_map,