void odp_flow_key_from_mask(struct ofpbuf *, const struct flow *mask,
const struct flow *flow, uint32_t odp_in_port,
size_t max_mpls_depth);
void odp_flow_key_from_mask(struct ofpbuf *, const struct flow *mask,
const struct flow *flow, uint32_t odp_in_port,
size_t max_mpls_depth);