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

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Message-ID: <62315e4c32c26_94df20814@john.notmuch>
Date:   Tue, 15 Mar 2022 20:49:32 -0700
From:   John Fastabend <john.fastabend@...il.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, toke@...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 wrote:
> 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: John Fastabend <john.fastabend@...il.com>