netdev - Re: [PATCH 3/5] ixgbe: add AF

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Date:   Wed, 26 Sep 2018 16:29:42 +0200
From:   Björn Töpel <bjorn.topel@...il.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
        intel-wired-lan <intel-wired-lan@...ts.osuosl.org>,
        Björn Töpel <bjorn.topel@...el.com>,
        "Karlsson, Magnus" <magnus.karlsson@...el.com>,
        Magnus Karlsson <magnus.karlsson@...il.com>, ast@...nel.org,
        Daniel Borkmann <daniel@...earbox.net>,
        Netdev <netdev@...r.kernel.org>,
        Jesper Dangaard Brouer <brouer@...hat.com>,
        William Tu <u9012063@...il.com>, tuc@...are.com
Subject: Re: [PATCH 3/5] ixgbe: add AF_XDP zero-copy Rx support

Den tis 25 sep. 2018 kl 16:57 skrev Jakub Kicinski
<jakub.kicinski@...ronome.com>:
>
> On Mon, 24 Sep 2018 18:35:55 +0200, Björn Töpel wrote:
> > +     if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
> > +             return -EINVAL;
> > +
> > +     if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
> > +             return -EINVAL;
>
> Hm, should you add UMEM checks to all the places these may get
> enabled?  Like fabf1bce103a ("ixgbe: Prevent unsupported configurations
> with XDP") did?

Actually, I can remove these checks, since it's already checked by the
XDP path. AF_XDP ZC is enabled only when XDP is enabled. So there's no
need to have the XDP checks in the AF_XDP path.

Björn