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Date:   Wed, 9 Sep 2020 22:35:12 -0700
From:   Alexei Starovoitov <>
To:     David Ahern <>
Cc:     Hangbin Liu <>, bpf <>,
        Network Development <>,
        Toke Høiland-Jørgensen <>,
        Jiri Benc <>,
        Jesper Dangaard Brouer <>,
        Eelco Chaudron <>,
        Alexei Starovoitov <>,
        Daniel Borkmann <>,
        Lorenzo Bianconi <>,
        Andrii Nakryiko <>
Subject: Re: [PATCHv11 bpf-next 2/5] xdp: add a new helper for dev map
 multicast support

On Wed, Sep 9, 2020 at 8:30 PM David Ahern <> wrote:
> >
> > I think the packets modification (edit dst mac, add vlan tag, etc) should be
> > done on egress, which rely on David's XDP egress support.
> agreed. The DEVMAP used for redirect can have programs attached that
> update the packet headers - assuming you want to update them.

Then you folks have to submit them as one set.
As-is the programmer cannot achieve correct behavior.

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