selftests/bpf: No need to drop the packet when there is no geneve opt
In bpf geneve tunnel test we set geneve option on tx side. On rx side we only call bpf_skb_get_tunnel_opt(). Since commit 9c2e14b4 ("ip_tunnels: Set tunnel option flag when tunnel metadata is present") geneve_rx() will not add TUNNEL_GENEVE_OPT flag if there is no geneve option, which cause bpf_skb_get_tunnel_opt() return ENOENT and _geneve_get_tunnel() in test_tunnel_kern.c drop the packet. As it should be valid that bpf_skb_get_tunnel_opt() return error when there is not tunnel option, there is no need to drop the packet and break all geneve rx traffic. Just set opt_class to 0 in this test and keep returning TC_ACT_OK. Fixes: 933a741e ("selftests/bpf: bpf tunnel test.") Signed-off-by:Hangbin Liu <liuhangbin@gmail.com> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Acked-by:
William Tu <u9012063@gmail.com> Link: https://lore.kernel.org/bpf/20210224081403.1425474-1-liuhangbin@gmail.com
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