netdev - Re: [PATCH v2 bpf-next 4/4] selftests/bpf: Test for get_socket

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Message-ID: <509c9c9a-ddc6-db1c-e2ec-8aca6d261922@fb.com>
Date:   Mon, 30 Jul 2018 20:44:47 -0700
From:   Yonghong Song <yhs@...com>
To:     Andrey Ignatov <rdna@...com>, <netdev@...r.kernel.org>
CC:     <ast@...nel.org>, <daniel@...earbox.net>, <brakmo@...com>,
        <kernel-team@...com>
Subject: Re: [PATCH v2 bpf-next 4/4] selftests/bpf: Test for get_socket_cookie



On 7/30/18 5:42 PM, Andrey Ignatov wrote:
> Add test to use get_socket_cookie() from BPF programs of types
> BPF_PROG_TYPE_SOCK_OPS and BPF_PROG_TYPE_CGROUP_SOCK_ADDR.
> 
> The test attaches two programs to cgroup, runs TCP server and client in
> the cgroup and checks that two operations are done properly on client
> socket when user calls connect(2):
> 
> 1. In BPF_CGROUP_INET6_CONNECT socket cookie is used as the key to write
>     new value in a map for client socket.
> 
> 2. In BPF_CGROUP_SOCK_OPS (BPF_SOCK_OPS_TCP_CONNECT_CB callback) the
>     value written in "1." is found by socket cookie, since it's the same
>     socket, and updated.
> 
> Finally the test verifies the value in the map.
> 
> Signed-off-by: Andrey Ignatov <rdna@...com>

Acked-by: Yonghong Song <yhs@...com>