netdev - Re: [bpf-next V4 PATCH 13/14] bpf: finally expose xdp_rxq

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Date:   Thu, 4 Jan 2018 20:34:41 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Jesper Dangaard Brouer <brouer@...hat.com>,
        Daniel Borkmann <borkmann@...earbox.net>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>
Cc:     netdev@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
        dsahern@...il.com, gospo@...adcom.com, bjorn.topel@...el.com,
        michael.chan@...adcom.com
Subject: Re: [bpf-next V4 PATCH 13/14] bpf: finally expose xdp_rxq_info to XDP
 bpf-programs

On 01/03/2018 02:26 AM, Jesper Dangaard Brouer wrote:
> Now all XDP driver have been updated to setup xdp_rxq_info and assign
> this to xdp_buff->rxq.  Thus, it is now safe to enable access to some
> of the xdp_rxq_info struct members.
> 
> This patch extend xdp_md and expose UAPI to userspace for
> ingress_ifindex and rx_queue_index.  Access happens via bpf
> instruction rewrite, that load data directly from struct xdp_rxq_info.
> 
> * ingress_ifindex map to xdp_rxq_info->dev->ifindex
> * rx_queue_index  map to xdp_rxq_info->queue_index
> 
> Signed-off-by: Jesper Dangaard Brouer <brouer@...hat.com>
> Acked-by: Alexei Starovoitov <ast@...nel.org>
> ---

LGTM

Acked-by: John Fastabend <john.fastabend@...il.com>