XEN_VM_ROOTNODE_FMT"/%d_"XEN_ADDR_SUFFIX,
vring->dom_id, vring->virtio_idx);
if ((buf = xen_read_node(path, &len)) == NULL)
goto out;
XEN_VM_ROOTNODE_FMT"/%d_"XEN_ADDR_SUFFIX,
vring->dom_id, vring->virtio_idx);
if ((buf = xen_read_node(path, &len)) == NULL)
goto out;