linux-kernel - Re: [PATCH bpf-next v6 8/8] selftests/bpf: Test that SO_REUSEPORT can be used with sk

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Date:   Mon, 24 Jul 2023 17:42:15 -0700
From:   Martin KaFai Lau <martin.lau@...ux.dev>
To:     Lorenz Bauer <lmb@...valent.com>
Cc:     Hemanth Malla <hemanthmalla@...il.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
        linux-kselftest@...r.kernel.org, Joe Stringer <joe@...ium.io>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        David Ahern <dsahern@...nel.org>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        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>,
        Joe Stringer <joe@...d.net.nz>,
        Mykola Lysenko <mykolal@...com>, Shuah Khan <shuah@...nel.org>,
        Kuniyuki Iwashima <kuniyu@...zon.com>
Subject: Re: [PATCH bpf-next v6 8/8] selftests/bpf: Test that SO_REUSEPORT can
 be used with sk_assign helper

On 7/20/23 8:30 AM, Lorenz Bauer wrote:
> +static int echo_test_udp(int fd_sv)
> +{
> +	struct sockaddr_storage addr = {};
> +	socklen_t len = sizeof(addr);
> +	char buff[1] = {};
> +	int fd_cl = -1, ret;
> +
> +	fd_cl = connect_to_fd(fd_sv, 100);
> +	ASSERT_GT(fd_cl, 0, "create_client");
> +	ASSERT_EQ(getsockname(fd_cl, (void *)&addr, &len), 0, "getsockname");
> +
> +	ASSERT_EQ(send(fd_cl, buff, sizeof(buff), 0), 1, "send_client");
> +
> +	ret = recv(fd_sv, buff, sizeof(buff), 0);
> +	if (ret < 0)

I think this needs a close(fd_cl).

> +		return errno;