BLKIF_PROTOCOL_NATIVE
ring->ri_protocol = BLKIF_PROTOCOL_NATIVE;
case BLKIF_PROTOCOL_NATIVE:
case BLKIF_PROTOCOL_NATIVE:
case BLKIF_PROTOCOL_NATIVE:
case BLKIF_PROTOCOL_NATIVE:
vdp->xs_blk_protocol = BLKIF_PROTOCOL_NATIVE;