netdev - Re: [PATCHv3 bpf-next 2/2] selftests/bpf: run mptcp in a dedicated netns

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Date:   Fri, 24 Feb 2023 10:24:14 +0100
From:   Matthieu Baerts <matthieu.baerts@...sares.net>
To:     Hangbin Liu <liuhangbin@...il.com>, netdev@...r.kernel.org
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>, bpf@...r.kernel.org,
        Jakub Kicinski <kuba@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Mykola Lysenko <mykolal@...com>,
        Felix Maurer <fmaurer@...hat.com>, mptcp@...ts.linux.dev
Subject: Re: [PATCHv3 bpf-next 2/2] selftests/bpf: run mptcp in a dedicated
 netns

Hi Hangbin,

Thank you for this new version!

On 24/02/2023 07:13, Hangbin Liu wrote:
> The current mptcp test is run in init netns. If the user or default
> system config disabled mptcp, the test will fail. Let's run the mptcp
> test in a dedicated netns to avoid none kernel default mptcp setting.

(...)

> +	SYS_NOFAIL("ip netns del " NS_TEST " &> /dev/null");

"Funny", I saw the ">&" in a previous versions and I was going to react
before noticing this is in fact valid in Bash (and ZSH). But of course I
should have checked with 'sh' instead...

Anyway, Martin: thank you for having spotted that!

Acked-by: Matthieu Baerts <matthieu.baerts@...sares.net>

Cheers,
Matt
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