Queuing disciplines with XDP_REDIRECT

Queuing disciplines with XDP_REDIRECT

[Rohit M P]

Hi folks,

I was experimenting with XDP where I'm able to route the packets using
XDP_REDIRECT.
Could anyone point me towards using kernel queuing disciplines along
with this if it's possible, or other possible alternatives for queuing
disciplines while using XDP_REDIRECT?

Regards,
Rohit M P

Re: Queuing disciplines with XDP_REDIRECT

[Rob Sherwood]

If you're interested in using the kernel's queuing features (e.g., tc)
there's a separate eBPF attachment point for tc that you might use
directly.  Check out
https://man7.org/linux/man-pages/man8/tc-bpf.8.html if that's of
interest.

- Rob
.

On Wed, Mar 10, 2021 at 7:32 AM Rohit M P <rohitmp99@gmail.com> wrote:
>
> Hi folks,
>
> I was experimenting with XDP where I'm able to route the packets using
> XDP_REDIRECT.
> Could anyone point me towards using kernel queuing disciplines along
> with this if it's possible, or other possible alternatives for queuing
> disciplines while using XDP_REDIRECT?
>
> Regards,
> Rohit M P

Re: Queuing disciplines with XDP_REDIRECT

[Toke Høiland-Jørgensen]

Rohit M P <rohitmp99@gmail.com> writes:

> Hi folks,
>
> I was experimenting with XDP where I'm able to route the packets using
> XDP_REDIRECT.
> Could anyone point me towards using kernel queuing disciplines along
> with this if it's possible, or other possible alternatives for queuing
> disciplines while using XDP_REDIRECT?

This is not currently possible. It's on our radar, though:
https://xdp-project.net/#Queueing-and-QoS - and we have a PhD student
who has started looking into this.

It may be a while before anything concrete materialises, though; in the
meantime you'll have to rely on TC if you want proper queueing with
BPF...

-Toke

Re: Queuing disciplines with XDP_REDIRECT

[Rohit M P]

Thank you for the response. Helps a lot!

On Mon, Mar 15, 2021 at 6:03 PM Toke Høiland-Jørgensen <toke@redhat.com> wrote:
>
> Rohit M P <rohitmp99@gmail.com> writes:
>
> > Hi folks,
> >
> > I was experimenting with XDP where I'm able to route the packets using
> > XDP_REDIRECT.
> > Could anyone point me towards using kernel queuing disciplines along
> > with this if it's possible, or other possible alternatives for queuing
> > disciplines while using XDP_REDIRECT?
>
> This is not currently possible. It's on our radar, though:
> https://xdp-project.net/#Queueing-and-QoS - and we have a PhD student
> who has started looking into this.
>
> It may be a while before anything concrete materialises, though; in the
> meantime you'll have to rely on TC if you want proper queueing with
> BPF...
>
> -Toke
>