netdev - Re: [net-next, PATCH 2/2, v2] net: socionext: add XDP support

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Date:   Wed, 12 Sep 2018 11:25:24 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Ilias Apalodimas <ilias.apalodimas@...aro.org>
Cc:     netdev@...r.kernel.org, jaswinder.singh@...aro.org,
        ard.biesheuvel@...aro.org, masami.hiramatsu@...aro.org,
        arnd@...db.de, mykyta.iziumtsev@...aro.org, bjorn.topel@...el.com,
        magnus.karlsson@...el.com, daniel@...earbox.net, ast@...nel.org,
        brouer@...hat.com
Subject: Re: [net-next, PATCH 2/2, v2] net: socionext: add XDP support

On Wed, 12 Sep 2018 12:02:38 +0300
Ilias Apalodimas <ilias.apalodimas@...aro.org> wrote:

>  static const struct net_device_ops netsec_netdev_ops = {
>  	.ndo_init		= netsec_netdev_init,
>  	.ndo_uninit		= netsec_netdev_uninit,
> @@ -1430,6 +1627,7 @@ static const struct net_device_ops netsec_netdev_ops = {
>  	.ndo_set_mac_address    = eth_mac_addr,
>  	.ndo_validate_addr	= eth_validate_addr,
>  	.ndo_do_ioctl		= netsec_netdev_ioctl,
> +	.ndo_bpf		= netsec_xdp,
>  };
>  

You have not implemented ndo_xdp_xmit.

Thus, you have "only" implemented the RX side of XDP_REDIRECT.  Which
allows you to do, cpumap and AF_XDP redirects, but not allowing other
drivers to XDP send out this device.

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