selftests/bpf: bpf tunnel test.
The patch migrates the original tests at samples/bpf/tcbpf2_kern.c and samples/bpf/test_tunnel_bpf.sh to selftests. There are a couple changes from the original: 1) add ipv6 vxlan, ipv6 geneve, ipv6 ipip tests 2) simplify the original ipip tests (remove iperf tests) 3) improve documentation 4) use bpf_ntoh* and bpf_hton* api In summary, 'test_tunnel_kern.o' contains the following bpf program: GRE: gre_set_tunnel, gre_get_tunnel IP6GRE: ip6gretap_set_tunnel, ip6gretap_get_tunnel ERSPAN: erspan_set_tunnel, erspan_get_tunnel IP6ERSPAN: ip4ip6erspan_set_tunnel, ip4ip6erspan_get_tunnel VXLAN: vxlan_set_tunnel, vxlan_get_tunnel IP6VXLAN: ip6vxlan_set_tunnel, ip6vxlan_get_tunnel GENEVE: geneve_set_tunnel, geneve_get_tunnel IP6GENEVE: ip6geneve_set_tunnel, ip6geneve_get_tunnel IPIP: ipip_set_tunnel, ipip_get_tunnel IP6IP: ipip6_set_tunnel, ipip6_get_tunnel, ip6ip6_set_tunnel, ip6ip6_get_tunnel XFRM: xfrm_get_state Signed-off-by: NWilliam Tu <u9012063@gmail.com> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
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