bpf_xdp_metadata_rx_vlan_tag
bpf_xdp_metadata_rx_vlan_tag, \
err = bpf_xdp_metadata_rx_vlan_tag(ctx, &meta->rx_vlan_proto,
extern int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx,
extern int bpf_xdp_metadata_rx_vlan_tag(const struct xdp_md *ctx,
bpf_xdp_metadata_rx_vlan_tag(ctx, &meta->rx_vlan_proto,