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For ipgre interfaces in collect metadata mode, receive also traffic with encapsulated Ethernet headers. The lwtunnel users are supposed to sort this out correctly. This allows to have mixed Ethernet + L3-only traffic on the same lwtunnel interface. This is the same way as VXLAN-GPE behaves. To keep backwards compatibility and prevent any surprises, gretap interfaces have priority in receiving packets with Ethernet headers. Signed-off-by: Jiri Benc <jbenc@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>