Re: Redirect from NIC to TAP

[Simon Horman <simon.horman@netronome.com>]

Hi Maciej, Hi Radu,

On Tue, Feb 09, 2021 at 10:41:37AM +0100, Maciej Fijalkowski wrote:
> On Tue, Feb 09, 2021 at 11:26:06AM +0200, Radu Stoenescu wrote:
> > Hello
> > 
> > My physical NIC is a Netronome (I can come back with exact model type
> > and driver version).
> > 
> > Redirect NIC to TAP doesn't work when XDP is attached in driver mode.
> > It works when they are both in generic mode. I haven't tried other
> > combinations of attachment modes (one driver, other generic etc.).
> 
> Looks like Netronome driver still doesn't support XDP_REDIRECT in native
> mode.
> 
> CC: Simon

Sorry for the delay, I was on vacation.

> Simon, any plans on adding support for redirect?

Sorry (again), there are no immediate plans to add this feature
to the driver.

> > Thanks
> > 
> > On Tue, Feb 9, 2021 at 11:21 AM Jesper Dangaard Brouer
> > <brouer@redhat.com> wrote:
> > >
> > > On Tue, 9 Feb 2021 10:31:50 +0200
> > > Radu Stoenescu <radu.stoe@gmail.com> wrote:
> > >
> > > > Is it possible to redirect packets from XDP program attached in driver
> > > > mode to a physical NIC to a TAP interface?
> > >
> > > Cc. Jason Wang as I think he implemented this, but I'm not 100% sure.
> > > Maybe Jason can remember?
> > > (or point me to the relevant code that I can check).
> > >
> > > > The same works fine if the XDP programs are attached in generic mode.
> > >
> > > So, you have tried and it doesn't work.
> > >
> > > What is your setup?
> > >
> > > --
> > > Best regards,
> > >   Jesper Dangaard Brouer
> > >   MSc.CS, Principal Kernel Engineer at Red Hat
> > >   LinkedIn: http://www.linkedin.com/in/brouer
> > >
> > 
> > 
> > -- 
> > Radu Stoenescu