Re: [dpdk-dev] Duplicating traffic with RTE Flow

[Jan Viktorin <viktorin@cesnet.cz>]

On Fri, 18 Sep 2020 14:23:42 +0000
Asaf Penso <asafp@nvidia.com> wrote:

> Hello Jan,
> 
> You can have a look in series [1] where we propose to add APIs to DPDK20.11 for both mirroring and sampling for packets, with additional actions of the different traffic.
> 
> [1]
> http://patches.dpdk.org/project/dpdk/list/?series=12045

Thanks! Can you please recommend me a base where I can apply this series?
For current main (dc18be1d8) I got:

error: patch failed: drivers/net/mlx5/mlx5_flow_dv.c:9537
error: drivers/net/mlx5/mlx5_flow_dv.c: patch does not apply
error: patch failed: drivers/net/mlx5/mlx5_flow_dv.c:80
error: drivers/net/mlx5/mlx5_flow_dv.c: patch does not apply
error: patch failed: drivers/net/mlx5/mlx5_flow_dv.c:9007
error: drivers/net/mlx5/mlx5_flow_dv.c: patch does not apply

Jan

> 
> Regards,
> Asaf Penso
> 
> >-----Original Message-----
> >From: dev <dev-bounces@dpdk.org> On Behalf Of Jan Viktorin
> >Sent: Friday, September 18, 2020 3:56 PM
> >To: dev@dpdk.org
> >Subject: [dpdk-dev] Duplicating traffic with RTE Flow
> >
> >Hello all,
> >
> >we are looking for a way to duplicate ingress traffic in hardware.
> >
> >There is an example in [1] suggesting to insert two fate actions into the RTE Flow
> >actions array like:
> >
> >  flow create 0 ingress pattern end \
> >      actions queue index 0 / void / queue index 1 / end
> >
> >But our experience is that PMDs reject two fate actions (tried with mlx5). Another
> >similar approach would be to deliver every single packet into two virtual
> >functions:
> >
> >  flow create 0 ingress pattern end \
> >     actions vf index 0 / vf index 1 / end
> >
> >Third possibility was to use passthru:
> >
> >  flow create 0 ingress pattern end \
> >      actions passthru / vf index 0 / end
> >  flow create 0 ingress pattern end \
> >      actions vf index 1 / end
> >
> >Again, tried on mlx5 and it does not support the passthru.
> >
> >Last idea was to use isolate with passthru (to deliver both to DPDK application
> >and to the kernel) but again there was no support on mlx5 for passthru...
> >
> >  flow isolate 0 true
> >  flow create 0 ingress pattern end actions passthru / rss end / end
> >
> >Is there any other possibility or PMD+NIC that is known to solve such issue?
> >
> >Thanks
> >Jan Viktorin
> >
> >[1]
> >https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdoc.dpdk
> >.org%2Fguides%2Fprog_guide%2Frte_flow.html%23table-rte-flow-redirect-
> >queue-5-
> >3&amp;data=02%7C01%7Casafp%40nvidia.com%7C1a46005bec5245e729e708d
> >85bd24caf%7C43083d15727340c1b7db39efd9ccc17a%7C0%7C0%7C6373603060
> >73519816&amp;sdata=EOF%2Fz62crvBZK8rwzwKIWxj5cVlfPVnU3FLmcL9X2w0%3
> >D&amp;reserved=0