Commit 124c4454 authored by Damien Le Moal's avatar Damien Le Moal Committed by Mike Snitzer
Browse files

dm flakey: add support for zoned block devices 



With the development of file system support for zoned block devices
(e.g. f2fs), having dm-flakey support these devices is interesting
to improve testing.

Add host-aware and host-managed zoned block devices support to in
dm-flakey.  The target type feature is set to DM_TARGET_ZONED_HM to
indicate support for host-managed models.  Also add hooks for remapping
of REQ_OP_ZONE_RESET and REQ_OP_ZONE_REPORT bios.  Additionally, in the
bio completion path, (backward) remapping of a zone report reply is
added.

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 10999307

drivers/md/dm-flakey.c

+20 −3
Original line number Diff line number Diff line
@@ -275,7 +275,7 @@ static void flakey_map_bio(struct dm_target *ti, struct bio *bio) 
	struct flakey_c *fc = ti->private;



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

	if (bio_sectors(bio))

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

		bio->bi_iter.bi_sector =

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

}
@@ -306,6 +306,14 @@ static int flakey_map(struct dm_target *ti, struct bio *bio) 
	struct per_bio_data *pb = dm_per_bio_data(bio, sizeof(struct per_bio_data));

	pb->bio_submitted = false;



	/* Do not fail reset zone */

	if (bio_op(bio) == REQ_OP_ZONE_RESET)

		goto map_bio;



	/* We need to remap reported zones, so remember the BIO iter */

	if (bio_op(bio) == REQ_OP_ZONE_REPORT)

		goto map_bio;



	/* Are we alive ? */

	elapsed = (jiffies - fc->start_time) / HZ;

	if (elapsed % (fc->up_interval + fc->down_interval) >= fc->up_interval) {
@@ -364,6 +372,14 @@ static int flakey_end_io(struct dm_target *ti, struct bio *bio, 
	struct flakey_c *fc = ti->private;

	struct per_bio_data *pb = dm_per_bio_data(bio, sizeof(struct per_bio_data));



	if (bio_op(bio) == REQ_OP_ZONE_RESET)

		return DM_ENDIO_DONE;



	if (bio_op(bio) == REQ_OP_ZONE_REPORT) {

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

		return DM_ENDIO_DONE;

	}



	if (!*error && pb->bio_submitted && (bio_data_dir(bio) == READ)) {

		if (fc->corrupt_bio_byte && (fc->corrupt_bio_rw == READ) &&

		    all_corrupt_bio_flags_match(bio, fc)) {
@@ -446,7 +462,8 @@ static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_ 


static struct target_type flakey_target = {

	.name   = "flakey",

	.version = {1, 4, 0},

	.version = {1, 5, 0},

	.features = DM_TARGET_ZONED_HM,

	.module = THIS_MODULE,

	.ctr    = flakey_ctr,

	.dtr    = flakey_dtr,

CRA Git | Maintained and supported by SUSTech CRA and CCSE