netdev - Re: xdp_router_ipv4 mellanox problem

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Date:   Wed, 31 Jan 2018 13:35:03 +0200
From:   Eran Ben Elisha <eranlinuxmellanox@...il.com>
To:     Paweł Staszewski <pstaszewski@...are.pl>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>
Subject: Re: xdp_router_ipv4 mellanox problem

On Mon, Jan 29, 2018 at 6:15 PM, Paweł Staszewski <pstaszewski@...are.pl> wrote:
> Hi

Hi Pawel

>
> Want to do some tests with xdp_router on two 100G physical interfaces but:
>
> Jan 29 17:00:40 HOST kernel: mlx5_core 0000:af:00.0: MLX5E: StrdRq(0)
> RqSz(1024) StrdSz(1) RxCqeCmprss(0)
> Jan 29 17:00:40 HOST kernel: mlx5_core 0000:af:00.0 enp175s0f0: Link up
> Jan 29 17:00:41 HOST kernel: mlx5_core 0000:af:00.1: MLX5E: StrdRq(0)
> RqSz(1024) StrdSz(1) RxCqeCmprss(0)
> Jan 29 17:00:41 HOST kernel: mlx5_core 0000:af:00.1 enp175s0f1: Link up
> Jan 29 17:00:41 HOST kernel: ------------[ cut here ]------------
> Jan 29 17:00:41 HOST kernel: Driver unsupported XDP return value 4, expect
> packet loss!

Unfortunately, our driver do not support XDP_REDIRECT action yet, thus
this warn is printed and packet is being dropped.
We are developing it currently, expecting to send it in the next
window of net-next.

thanks,
Eran

> Jan 29 17:00:41 HOST kernel: WARNING: CPU: 43 PID: 0 at
> net/core/filter.c:3901 bpf_warn_invalid_xdp_action+0x34/0x40
> Jan 29 17:00:41 HOST kernel: Modules linked in: x86_pkg_temp_thermal ipmi_si
> Jan 29 17:00:41 HOST kernel: CPU: 43 PID: 0 Comm: swapper/43 Not tainted
> 4.15.0-rc9+ #1
> Jan 29 17:00:41 HOST kernel: RIP: 0010:bpf_warn_invalid_xdp_action+0x34/0x40
> Jan 29 17:00:41 HOST kernel: RSP: 0018:ffff88087f9c3dc8 EFLAGS: 00010296