netdev - Re: [PATCH bpf-next v3 1/2] bpf: Add ipip6 and ip6ip decap support for bpf_skb_adjust

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Message-ID: <CA+FuTSfwZNBMnuUXgLOq8Z4s5es13tmK=oPNFWsWG22ztmWQLQ@mail.gmail.com>
Date:   Fri, 13 Jan 2023 09:10:41 -0500
From:   Willem de Bruijn <willemb@...gle.com>
To:     Ziyang Xuan <william.xuanziyang@...wei.com>
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, bpf@...r.kernel.org, netdev@...r.kernel.org,
        martin.lau@...ux.dev, song@...nel.org, yhs@...com,
        john.fastabend@...il.com, kpsingh@...nel.org, sdf@...gle.com,
        haoluo@...gle.com, jolsa@...nel.org
Subject: Re: [PATCH bpf-next v3 1/2] bpf: Add ipip6 and ip6ip decap support
 for bpf_skb_adjust_room()

On Fri, Jan 13, 2023 at 4:25 AM Ziyang Xuan
<william.xuanziyang@...wei.com> wrote:
>
> Add ipip6 and ip6ip decap support for bpf_skb_adjust_room().
> Main use case is for using cls_bpf on ingress hook to decapsulate
> IPv4 over IPv6 and IPv6 over IPv4 tunnel packets.
>
> Add two new flags BPF_F_ADJ_ROOM_DECAP_L3_IPV{4,6} to indicate the
> new IP header version after decapsulating the outer IP header.
>
> Suggested-by: Willem de Bruijn <willemb@...gle.com>
> Signed-off-by: Ziyang Xuan <william.xuanziyang@...wei.com>

Reviewed-by: Willem de Bruijn <willemb@...gle.com>