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Date:   Fri, 17 Jun 2022 13:21:28 -0700
From:   Martin KaFai Lau <>
To:     Jörn-Thorben Hinz <>
Cc:, Alexei Starovoitov <>,
        Daniel Borkmann <>,
        Andrii Nakryiko <>,
Subject: Re: [PATCH bpf-next v3 1/5] bpf: Allow a TCP CC to write
 sk_pacing_rate and sk_pacing_status

On Tue, Jun 14, 2022 at 12:44:48PM +0200, Jörn-Thorben Hinz wrote:
> A CC that implements tcp_congestion_ops.cong_control() should be able to
> control sk_pacing_rate and set sk_pacing_status, since
> tcp_update_pacing_rate() is never called in this case. A built-in CC or
> one from a kernel module is already able to write to both struct sock
> members. For a BPF program, write access has not been allowed, yet.
> Signed-off-by: Jörn-Thorben Hinz <>
Reviewed-by: Martin KaFai Lau <>

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