netdev - Re: [PATCH bpf-next v3 01/15] net: initial AF

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Date:   Thu, 24 May 2018 08:38:23 +0200
From:   Björn Töpel <bjorn.topel@...il.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        "Duyck, Alexander H" <alexander.h.duyck@...el.com>,
        Alexander Duyck <alexander.duyck@...il.com>,
        John Fastabend <john.fastabend@...il.com>,
        Alexei Starovoitov <ast@...com>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        Willem de Bruijn <willemdebruijn.kernel@...il.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Netdev <netdev@...r.kernel.org>,
        Björn Töpel <bjorn.topel@...el.com>,
        michael.lundkvist@...csson.com,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "Singhai, Anjali" <anjali.singhai@...el.com>,
        "Zhang, Qi Z" <qi.z.zhang@...el.com>
Subject: Re: [PATCH bpf-next v3 01/15] net: initial AF_XDP skeleton

2018-05-24 0:50 GMT+02:00 Stephen Hemminger <stephen@...workplumber.org>:
> On Wed,  2 May 2018 13:01:22 +0200
> Björn Töpel <bjorn.topel@...il.com> wrote:
>
>> diff --git a/net/xdp/Kconfig b/net/xdp/Kconfig
>> new file mode 100644
>> index 000000000000..90e4a7152854
>> --- /dev/null
>> +++ b/net/xdp/Kconfig
>> @@ -0,0 +1,7 @@
>> +config XDP_SOCKETS
>> +     bool "XDP sockets"
>> +     depends on BPF_SYSCALL
>> +     default n
>> +     help
>> +       XDP sockets allows a channel between XDP programs and
>> +       userspace applications.
>
> Why is XDP not supported as a module?
> Most distributions will want it to be a module so that it is not loaded
> unless used, and AF_XDP could be also be disabled by blacklisting the module.

Yes, all good points, and The Grand Plan is adding module support.
Unfortunately, it's not there yet.