dmz_start_sect
ret = blkdev_report_zones(dev->bdev, dmz_start_sect(zmd, zone), 1,
dmz_start_sect(zmd, zone),
dmz_start_sect(zmd, zone) + dmz_blk2sect(wp_block),
dmz_start_sect(dmz->metadata, zone) + dmz_blk2sect(chunk_block);
sector_t dmz_start_sect(struct dmz_metadata *zmd, struct dm_zone *zone);