From: Damien Le Moal <[email protected]> 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: Damien Le Moal <[email protected]> --- drivers/md/dm-linear.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index 4788b0b..9c4debd 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -87,7 +87,7 @@ static void linear_map_bio(struct dm_target *ti, struct bio *bio) struct linear_c *lc = ti->private; 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 = linear_map_sector(ti, bio->bi_iter.bi_sector); } @@ -99,6 +99,16 @@ static int linear_map(struct dm_target *ti, struct bio *bio) return DM_MAPIO_REMAPPED; } +static int linear_end_io(struct dm_target *ti, struct bio *bio, int 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 error; +} + static void linear_status(struct dm_target *ti, status_type_t type, unsigned status_flags, char *result, unsigned maxlen) { @@ -162,10 +172,12 @@ static long linear_direct_access(struct dm_target *ti, sector_t sector, static struct target_type linear_target = { .name = "linear", .version = {1, 3, 0}, + .features = DM_TARGET_ZONED_HM, .module = THIS_MODULE, .ctr = linear_ctr, .dtr = linear_dtr, .map = linear_map, + .end_io = linear_end_io, .status = linear_status, .prepare_ioctl = linear_prepare_ioctl, .iterate_devices = linear_iterate_devices, -- 2.9.3
