netdev - Re: [RFC net-next 7/8] xdp: add reporting of offload mode

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Date:   Tue, 20 Jun 2017 01:40:14 +0200
From:   Daniel Borkmann <daniel@...earbox.net>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        netdev@...r.kernel.org
CC:     davem@...emloft.net, kafai@...com, netoptimizer@...uer.com,
        oss-drivers@...ronome.com
Subject: Re: [RFC net-next 7/8] xdp: add reporting of offload mode

On 06/17/2017 01:57 AM, Jakub Kicinski wrote:
> Extend the XDP_ATTACHED_* values to include offloaded mode.
> Let drivers report whether program is installed in the driver
> or the HW by changing the prog_attached field from bool to
> u8 (type of the netlink attribute).
>
> Exploit the fact that the value of XDP_ATTACHED_DRV is 1,
> therefore since all drivers currently assign the mode with
> double negation:
>         mode = !!xdp_prog;
> no drivers have to be modified.
>
> Signed-off-by: Jakub Kicinski <jakub.kicinski@...ronome.com>

Acked-by: Daniel Borkmann <daniel@...earbox.net>