netdev - Re: [PATCH] net: bpf: Allow TC programs to call BPF_FUNC_skb_change

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Message-ID: <CAADnVQK8mhrxhQJPyBAhFU9mOCZYuoHot5LQFQMuENYzTtHu-g@mail.gmail.com>
Date:   Sun, 26 Apr 2020 09:02:49 -0700
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Maciej Żenczykowski <zenczykowski@...il.com>
Cc:     Maciej Żenczykowski <maze@...gle.com>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Linux Network Development Mailing List 
        <netdev@...r.kernel.org>, LKML <linux-kernel@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Lorenzo Colitti <lorenzo@...gle.com>
Subject: Re: [PATCH] net: bpf: Allow TC programs to call BPF_FUNC_skb_change_head

On Mon, Apr 20, 2020 at 11:34 AM Maciej Żenczykowski
<zenczykowski@...il.com> wrote:
>
> From: Lorenzo Colitti <lorenzo@...gle.com>
>
> This allows TC eBPF programs to modify and forward (redirect) packets
> from interfaces without ethernet headers (for example cellular)
> to interfaces with (for example ethernet/wifi).
>
> The lack of this appears to simply be an oversight.
>
> Tested:
>   in active use in Android R on 4.14+ devices for ipv6
>   cellular to wifi tethering offload.
>
> Signed-off-by: Lorenzo Colitti <lorenzo@...gle.com>
> Signed-off-by: Maciej Żenczykowski <maze@...gle.com>

Applied. Thanks