netdev - Re: [PATCH v8 bpf-next 05/10] veth: Handle xdp

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Date:   Fri, 3 Aug 2018 11:07:10 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>, netdev@...r.kernel.org,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        John Fastabend <john.fastabend@...il.com>, brouer@...hat.com
Subject: Re: [PATCH v8 bpf-next 05/10] veth: Handle xdp_frames in xdp napi
 ring

On Fri,  3 Aug 2018 16:58:13 +0900
Toshiaki Makita <makita.toshiaki@....ntt.co.jp> wrote:

> This is preparation for XDP TX and ndo_xdp_xmit.
> This allows napi handler to handle xdp_frames through xdp ring as well
> as sk_buff.
> 
> v8:
> - Don't use xdp_frame pointer address to calculate skb->head and
>   headroom.
> 
> v7:
> - Use xdp_scrub_frame() instead of memset().
> 
> v3:
> - Revert v2 change around rings and use a flag to differentiate skb and
>   xdp_frame, since bulk skb xmit makes little performance difference
>   for now.
> 
> v2:
> - Use another ring instead of using flag to differentiate skb and
>   xdp_frame. This approach makes bulk skb transmit possible in
>   veth_xmit later.
> - Clear xdp_frame feilds in skb->head.
> - Implement adjust_tail.
> 
> Signed-off-by: Toshiaki Makita <makita.toshiaki@....ntt.co.jp>
> Acked-by: John Fastabend <john.fastabend@...il.com>

Acked-by: Jesper Dangaard Brouer <brouer@...hat.com>

Thanks this looks much better.

-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer