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Date:   Mon, 18 May 2020 18:02:03 -0600
From:   David Ahern <>
To:     Daniel Borkmann <>,
        Toke Høiland-Jørgensen <>,
        David Ahern <>,
        David Ahern <>
Subject: Re: [PATCH v5 bpf-next 00/11] net: Add support for XDP in egress path

On 5/18/20 3:06 PM, Daniel Borkmann wrote:
> So given we neither call this hook on the skb path, nor XDP_TX nor
> path, I was wondering also wrt the discussion with John if it makes
> sense to
> make this hook a property of the devmap _itself_, for example, to have a
> default
> BPF prog upon devmap creation or a dev-specific override that is passed
> on map
> update along with the dev. At least this would make it very clear where
> this is
> logically tied to and triggered from, and if needed (?) would provide
> potentially
> more flexibility on specifiying BPF progs to be called while also
> solving your
> use-case.

You lost me on the 'property of the devmap.' The programs need to be per
netdevice, and devmap is an array of devices. Can you elaborate?

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