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Commit 0be12c1c authored by Damien Le Moal's avatar Damien Le Moal Committed by Mike Snitzer
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dm linear: add support for zoned block devices 



Add support for zoned block devices by allowing host-managed zoned block
device mapped targets, the remapping of REQ_OP_ZONE_RESET and the post
processing (reply remapping) of REQ_OP_ZONE_REPORT.

Signed-off-by: default avatarDamien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Reviewed-by: default avatarBart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 124c4454

drivers/md/dm-linear.c

+15 −3
Original line number Original line Diff line number Diff line
@@ -89,7 +89,7 @@ static void linear_map_bio(struct dm_target *ti, struct bio *bio) 
	struct linear_c *lc = ti->private;

	struct linear_c *lc = ti->private;





	bio->bi_bdev = lc->dev->bdev;

	bio->bi_bdev = lc->dev->bdev;

	if (bio_sectors(bio))

	if (bio_sectors(bio) || bio_op(bio) == REQ_OP_ZONE_RESET)

		bio->bi_iter.bi_sector =

		bio->bi_iter.bi_sector =

			linear_map_sector(ti, bio->bi_iter.bi_sector);

			linear_map_sector(ti, bio->bi_iter.bi_sector);

}

}
@@ -101,6 +101,17 @@ static int linear_map(struct dm_target *ti, struct bio *bio) 
	return DM_MAPIO_REMAPPED;

	return DM_MAPIO_REMAPPED;

}

}





static int linear_end_io(struct dm_target *ti, struct bio *bio,

			 blk_status_t *error)

{

	struct linear_c *lc = ti->private;



	if (!*error && bio_op(bio) == REQ_OP_ZONE_REPORT)

		dm_remap_zone_report(ti, bio, lc->start);



	return DM_ENDIO_DONE;

}



static void linear_status(struct dm_target *ti, status_type_t type,

static void linear_status(struct dm_target *ti, status_type_t type,

			  unsigned status_flags, char *result, unsigned maxlen)

			  unsigned status_flags, char *result, unsigned maxlen)

{

{
@@ -161,12 +172,13 @@ static long linear_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, 




static struct target_type linear_target = {

static struct target_type linear_target = {

	.name   = "linear",

	.name   = "linear",

	.version = {1, 3, 0},

	.version = {1, 4, 0},

	.features = DM_TARGET_PASSES_INTEGRITY,

	.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM,

	.module = THIS_MODULE,

	.module = THIS_MODULE,

	.ctr    = linear_ctr,

	.ctr    = linear_ctr,

	.dtr    = linear_dtr,

	.dtr    = linear_dtr,

	.map    = linear_map,

	.map    = linear_map,

	.end_io = linear_end_io,

	.status = linear_status,

	.status = linear_status,

	.prepare_ioctl = linear_prepare_ioctl,

	.prepare_ioctl = linear_prepare_ioctl,

	.iterate_devices = linear_iterate_devices,

	.iterate_devices = linear_iterate_devices,