VIRTIO_BLK_F_BLK_SIZE
{ VIRTIO_BLK_F_BLK_SIZE, "BlockSize" },
VTBLK_GET_CONFIG(dev, VIRTIO_BLK_F_BLK_SIZE, blk_size, blkcfg);
VIRTIO_BLK_F_BLK_SIZE | \
if (virtio_with_feature(dev, VIRTIO_BLK_F_BLK_SIZE))