netdev - Re: Question about flow table offload in mlx5e

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Date:   Wed, 27 Nov 2019 21:45:59 +0800
From:   wenxu <wenxu@...oud.cn>
To:     Paul Blakey <paulb@...lanox.com>
Cc:     "pablo@...filter.org" <pablo@...filter.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Mark Bloch <markb@...lanox.com>
Subject: Re: Question about flow table offload in mlx5e


在 2019/11/27 21:20, Paul Blakey 写道:
> On 11/27/2019 3:11 PM, Paul Blakey wrote:
>> On 11/27/2019 2:16 PM, wenxu wrote:
>>
>>> Sorry maybe something mess you,  Ignore with my patches.
>>>
>>>
>>> I also did the test like you with route tc rules to ft callback.
>>>
>>>
>>> please also did the following test:  mlx_p0 is the pf and mlx_pf0vf0 
>>> is the vf .
>>>
>> Are you  in switchdev mode (via devlink) or default legacy mode?
>>
>>
> mlx_pf0vf0  is representor device created after entring switchdev mode? and eth0 in vm is the binded mlx5 VF?

Yes, mlx_pf0vf0 is the representor and eth0 in vm is VF. It also in the switchdev mode.


sudo grep -ri "" /sys/class/net/*/phys_* 2>/dev/null
/sys/class/net/mlx_p0/phys_port_name:p0
/sys/class/net/mlx_p0/phys_switch_id:34ebc100034b6b50
/sys/class/net/mlx_pf0vf0/phys_port_name:pf0vf0
/sys/class/net/mlx_pf0vf0/phys_switch_id:34ebc100034b6b50
/sys/class/net/mlx_pf0vf1/phys_port_name:pf0vf1
/sys/class/net/mlx_pf0vf1/phys_switch_id:34ebc100034b6b50

The problem is when the last filter add in the tun1 will lead the outgoing syn packets can't be real offloaded

>
> Can you run this command:
>
> sudo grep -ri "" /sys/class/net/*/phys_* 2>/dev/null
>
> example:
> /sys/class/net/ens1f0_0/phys_port_name:pf0vf0
> /sys/class/net/ens1f0_0/phys_switch_id:b828a50003078a24
> /sys/class/net/ens1f0_1/phys_port_name:pf0vf1
> /sys/class/net/ens1f0_1/phys_switch_id:b828a50003078a24
> /sys/class/net/ens1f0/phys_port_name:p0
> /sys/class/net/ens1f0/phys_switch_id:b828a50003078a24
>
> and
> sudo ls /sys/class/net/*/device/virtfn*/net
>
> example:
> /sys/class/net/ens1f0/device/virtfn0/net:
> ens1f2
>
> /sys/class/net/ens1f0/device/virtfn1/net:
> ens1f3
>
> and even
>
> lspci | grep -i mellanox ; ls -l /sys/class/net
>
>
>
>
>
>
> Thansk.
>
>