netdev - Re: [PATCH v5 bpf-next 2/3] veth: rework veth_xdp_rcv

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Date:   Fri, 11 Mar 2022 15:59:25 +0100
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Lorenzo Bianconi <lorenzo@...nel.org>, bpf@...r.kernel.org,
        netdev@...r.kernel.org
Cc:     davem@...emloft.net, kuba@...nel.org, ast@...nel.org,
        daniel@...earbox.net, brouer@...hat.com, pabeni@...hat.com,
        echaudro@...hat.com, lorenzo.bianconi@...hat.com,
        toshiaki.makita1@...il.com, andrii@...nel.org
Subject: Re: [PATCH v5 bpf-next 2/3] veth: rework veth_xdp_rcv_skb in order
 to accept non-linear skb

Lorenzo Bianconi <lorenzo@...nel.org> writes:

> Introduce veth_convert_skb_to_xdp_buff routine in order to
> convert a non-linear skb into a xdp buffer. If the received skb
> is cloned or shared, veth_convert_skb_to_xdp_buff will copy it
> in a new skb composed by order-0 pages for the linear and the
> fragmented area. Moreover veth_convert_skb_to_xdp_buff guarantees
> we have enough headroom for xdp.
> This is a preliminary patch to allow attaching xdp programs with frags
> support on veth devices.
>
> Signed-off-by: Lorenzo Bianconi <lorenzo@...nel.org>

Acked-by: Toke Høiland-Jørgensen <toke@...hat.com>