netdev - Re: [bpf-next 0/6] Introduce a BPF helper to generate SYN cookies

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Message-ID: <CACAyw9_6jp6PauEcCSVvc+JJA1VvZgNsYZtuvu5=vf4b0rxkvw@mail.gmail.com>
Date:   Tue, 23 Jul 2019 11:27:51 +0100
From:   Lorenz Bauer <lmb@...udflare.com>
To:     Petar Penkov <ppenkov.kernel@...il.com>
Cc:     Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        davem@...emloft.net, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Stanislav Fomichev <sdf@...gle.com>,
        Petar Penkov <ppenkov@...gle.com>
Subject: Re: [bpf-next 0/6] Introduce a BPF helper to generate SYN cookies

On Tue, 23 Jul 2019 at 01:20, Petar Penkov <ppenkov.kernel@...il.com> wrote:
>
> From: Petar Penkov <ppenkov@...gle.com>
>
> This patch series introduces a BPF helper function that allows generating SYN
> cookies from BPF. Currently, this helper is enabled at both the TC hook and the
> XDP hook.
>
> The first two patches in the series add/modify several TCP helper functions to
> allow for SKB-less operation, as is the case at the XDP hook.
>
> The third patch introduces the bpf_tcp_gen_syncookie helper function which
> generates a SYN cookie for either XDP or TC programs. The return value of
> this function contains both the MSS value, encoded in the cookie, and the
> cookie itself.
>
> The last three patches sync tools/ and add a test.

Reviewed-by: Lorenz Bauer <lmb@...udflare.com>

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