netdev - Re: [PATCH net 2/2] selftests: udpgro: no need to load xdp for gro

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Message-ID: <87v803csp0.fsf@toke.dk>
Date: Wed, 14 Aug 2024 12:19:39 +0200
From: Toke Høiland-Jørgensen <toke@...hat.com>
To: Hangbin Liu <liuhangbin@...il.com>, netdev@...r.kernel.org
Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
 <pabeni@...hat.com>, Shuah Khan <shuah@...nel.org>, Alexei Starovoitov
 <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, Jesper Dangaard
 Brouer <hawk@...nel.org>, John Fastabend <john.fastabend@...il.com>, Ignat
 Korchagin <ignat@...udflare.com>, linux-kselftest@...r.kernel.org,
 bpf@...r.kernel.org, Hangbin Liu <liuhangbin@...il.com>, Yi Chen
 <yiche@...hat.com>
Subject: Re: [PATCH net 2/2] selftests: udpgro: no need to load xdp for gro

Hangbin Liu <liuhangbin@...il.com> writes:

> After commit d7db7775ea2e ("net: veth: do not manipulate GRO when using
> XDP"), there is no need to load XDP program to enable GRO. On the other
> hand, the current test is failed due to loading the XDP program. e.g.
>
>  # selftests: net: udpgro.sh
>  # ipv4
>  #  no GRO                                  ok
>  #  no GRO chk cmsg                         ok
>  #  GRO                                     ./udpgso_bench_rx: recv: bad packet len, got 1472, expected 14720
>  #
>  # failed
>
>  [...]
>
>  #  bad GRO lookup                          ok
>  #  multiple GRO socks                      ./udpgso_bench_rx: recv: bad packet len, got 1452, expected 14520
>  #
>  # ./udpgso_bench_rx: recv: bad packet len, got 1452, expected 14520
>  #
>  # failed
>  ok 1 selftests: net: udpgro.sh
>
> After fix, all the test passed.
>
>  # ./udpgro.sh
>  ipv4
>   no GRO                                  ok
>   [...]
>   multiple GRO socks                      ok
>
> Fixes: d7db7775ea2e ("net: veth: do not manipulate GRO when using XDP")
> Reported-by: Yi Chen <yiche@...hat.com>
> Closes: https://issues.redhat.com/browse/RHEL-53858
> Signed-off-by: Hangbin Liu <liuhangbin@...il.com>

Reviewed-by: Toke Høiland-Jørgensen <toke@...hat.com>