ds_is_my_hdl
if ((rv = ds_is_my_hdl(hdl, DS_INVALID_INSTANCE)) != 0) {
if ((rv = ds_is_my_hdl(hdl, minor)) != 0) {
if ((rv = ds_is_my_hdl(hdl, minor)) != 0) {
if ((rv = ds_is_my_hdl(hdl, minor)) != 0) {
int ds_is_my_hdl(ds_svc_hdl_t hdl, int instance);