netdev - Re: [PATCH bpf-next v2 1/2] bpf/flow_dissector: add mode to enforce global BPF flow dissector

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Message-ID: <CAPhsuW6-mdSLFDUdGL1eh2n2Wx32GDsvjCSSyv1dxom1g=uUow@mail.gmail.com>
Date:   Fri, 4 Oct 2019 10:53:22 -0700
From:   Song Liu <liu.song.a23@...il.com>
To:     Stanislav Fomichev <sdf@...gle.com>
Cc:     Networking <netdev@...r.kernel.org>, bpf <bpf@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Petar Penkov <ppenkov@...gle.com>
Subject: Re: [PATCH bpf-next v2 1/2] bpf/flow_dissector: add mode to enforce
 global BPF flow dissector

On Fri, Oct 4, 2019 at 8:58 AM Stanislav Fomichev <sdf@...gle.com> wrote:
>
> Always use init_net flow dissector BPF program if it's attached and fall
> back to the per-net namespace one. Also, deny installing new programs if
> there is already one attached to the root namespace.
> Users can still detach their BPF programs, but can't attach any
> new ones (-EEXIST).
>
> Cc: Petar Penkov <ppenkov@...gle.com>
> Signed-off-by: Stanislav Fomichev <sdf@...gle.com>

Acked-by: Song Liu <songliubraving@...com>