linux-kernel - Re: [PATCH bpf-next 2/4] selftests/bpf: Add RUN_MPTCP

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Date: Tue, 7 May 2024 07:44:07 -0700
From: Alexei Starovoitov <alexei.starovoitov@...il.com>
To: "Matthieu Baerts (NGI0)" <matttbe@...nel.org>
Cc: MPTCP Upstream <mptcp@...ts.linux.dev>, Mat Martineau <martineau@...nel.org>, 
	Geliang Tang <geliang@...nel.org>, Andrii Nakryiko <andrii@...nel.org>, 
	Eduard Zingerman <eddyz87@...il.com>, Mykola Lysenko <mykolal@...com>, Alexei Starovoitov <ast@...nel.org>, 
	Daniel Borkmann <daniel@...earbox.net>, Martin KaFai Lau <martin.lau@...ux.dev>, Song Liu <song@...nel.org>, 
	Yonghong Song <yonghong.song@...ux.dev>, 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>, Shuah Khan <shuah@...nel.org>, LKML <linux-kernel@...r.kernel.org>, 
	Network Development <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>, 
	"open list:KERNEL SELFTEST FRAMEWORK" <linux-kselftest@...r.kernel.org>, Geliang Tang <tanggeliang@...inos.cn>
Subject: Re: [PATCH bpf-next 2/4] selftests/bpf: Add RUN_MPTCP_TEST macro

On Tue, May 7, 2024 at 3:53 AM Matthieu Baerts (NGI0)
<matttbe@...nel.org> wrote:
>
> From: Geliang Tang <tanggeliang@...inos.cn>
>
> Each MPTCP subtest tests test__start_subtest(suffix), then invokes
> test_suffix(). It makes sense to add a new macro RUN_MPTCP_TEST to
> simpolify the code.
>
> Signed-off-by: Geliang Tang <tanggeliang@...inos.cn>
> Reviewed-by: Mat Martineau <martineau@...nel.org>
> Signed-off-by: Matthieu Baerts (NGI0) <matttbe@...nel.org>
> ---
>  tools/testing/selftests/bpf/prog_tests/mptcp.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
>
> diff --git a/tools/testing/selftests/bpf/prog_tests/mptcp.c b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> index baf976a7a1dd..9d1b255bb654 100644
> --- a/tools/testing/selftests/bpf/prog_tests/mptcp.c
> +++ b/tools/testing/selftests/bpf/prog_tests/mptcp.c
> @@ -347,10 +347,14 @@ static void test_mptcpify(void)
>         close(cgroup_fd);
>  }
>
> +#define RUN_MPTCP_TEST(suffix)                                 \
> +do {                                                           \
> +       if (test__start_subtest(#suffix))                       \
> +               test_##suffix();                                \
> +} while (0)

Please no.
Don't hide it behind macros.

>  void test_mptcp(void)
>  {
> -       if (test__start_subtest("base"))
> -               test_base();
> -       if (test__start_subtest("mptcpify"))
> -               test_mptcpify();
> +       RUN_MPTCP_TEST(base);
> +       RUN_MPTCP_TEST(mptcpify);
>  }
>
> --
> 2.43.0
>