netdev - Re: [PATCH bpf 2/4] selftests: bpf: ignore RST packets for reuseport tests

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Message-ID: <CACAyw999DErydNaDVgczYtqzSP09hnXtmwwJ0kocjisfRdVhxQ@mail.gmail.com>
Date:   Thu, 23 Jan 2020 17:18:12 +0000
From:   Lorenz Bauer <lmb@...udflare.com>
To:     Martin Lau <kafai@...com>
Cc:     Shuah Khan <shuah@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Andrii Nakryiko <andriin@...com>,
        "linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH bpf 2/4] selftests: bpf: ignore RST packets for reuseport tests

On Thu, 23 Jan 2020 at 17:16, Martin Lau <kafai@...com> wrote:
>
> On Thu, Jan 23, 2020 at 04:59:31PM +0000, Lorenz Bauer wrote:
> > The reuseport tests currently suffer from a race condition: RST
> > packets count towards DROP_ERR_SKB_DATA, since they don't contain
> > a valid struct cmd. Tests will spuriously fail depending on whether
> > check_results is called before or after the RST is processed.
> >
> > Exit the BPF program early if FIN is set.
> Make sense.
> Is it a RST or FIN?  The earlier commit message said RST.

FIN, sorry. I'll update in a follow up.

-- 
Lorenz Bauer  |  Systems Engineer
6th Floor, County Hall/The Riverside Building, SE1 7PB, UK

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