On Thu, 2022-02-17 at 09:05 -0800, Alexei Starovoitov wrote: > On Thu, Feb 17, 2022 at 12:45 AM Paolo Abeni <pabeni@xxxxxxxxxx> > wrote: > > To clarify: Alexei is asking to add a test under: > > > > tools/testing/selftests/net/ > > > > to cover this specific case. You can propbably extend the existing > > udpgro_fwd.sh. > > Exactly. > I suspect the setup needs a bit more than just iperf udp test. > Does it need a specific driver and hw? My hw is Android phone, Android system has improved clatd with bpf. When clatd starts, cls_bpf_classify will handle ingress packets with bpf progs. bpf_skb_proto_6_to_4 is used here. > Can it be reproduced with veth or other virtual netdev? I am not sure. I have no idea how to verify it in linux system. > Also commit talks about bpf_skb_proto_6_to_4. > So that bpf helper has to be somehow involved, but iperf udp test > says nothing about it. > Please craft a _complete_ selftest. Thanks!
