linux-kernel - Re: [PATCH v6 3/3] net: dsa: ocelot: Add support for QinQ Operation

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Date:   Wed, 16 Sep 2020 13:00:24 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     hongbo.wang@....com
Cc:     xiaoliang.yang_1@....com, po.liu@....com, mingkai.hu@....com,
        allan.nielsen@...rochip.com, claudiu.manoil@....com,
        alexandru.marginean@....com, vladimir.oltean@....com,
        leoyang.li@....com, andrew@...n.ch, f.fainelli@...il.com,
        vivien.didelot@...il.com, davem@...emloft.net, jiri@...nulli.us,
        idosch@...sch.org, kuba@...nel.org, vinicius.gomes@...el.com,
        nikolay@...ulusnetworks.com, roopa@...ulusnetworks.com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        horatiu.vultur@...rochip.com, alexandre.belloni@...tlin.com,
        UNGLinuxDriver@...rochip.com, ivecera@...hat.com
Subject: Re: [PATCH v6 3/3] net: dsa: ocelot: Add support for QinQ Operation

Hi Hongbo,

On Wed, Sep 16, 2020 at 05:48:45PM +0800, hongbo.wang@....com wrote:
> From: "hongbo.wang" <hongbo.wang@....com>
>
> This feature can be test in the following case:
> Customer <-----> swp0  <-----> swp1 <-----> ISP
>
> Customer will send and receive packets with single VLAN tag(CTAG),
> ISP will send and receive packets with double VLAN tag(STAG and CTAG).
> This refers to "4.3.3 Provider Bridges and Q-in-Q Operation" in
> VSC99599_1_00_TS.pdf.
>
> The related test commands:
> 1.
> devlink dev param set pci/0000:00:00.5 name qinq_port_bitmap \
> value 2 cmode runtime
> 2.
> ip link add dev br0 type bridge vlan_protocol 802.1ad
> ip link set dev swp0 master br0
> ip link set dev swp1 master br0
> ip link set dev br0 type bridge vlan_filtering 1
> 3.
> bridge vlan del dev swp0 vid 1 pvid
> bridge vlan add dev swp0 vid 100 pvid untagged
> bridge vlan add dev swp1 vid 100
> Result:
> Customer(tpid:8100 vid:111) -> swp0 -> swp1 -> ISP(STAG \
>             tpid:88A8 vid:100, CTAG tpid:8100 vid:111)
> ISP(tpid:88A8 vid:100 tpid:8100 vid:222) -> swp1 -> swp0 ->\
>             Customer(tpid:8100 vid:222)
>
> Signed-off-by: hongbo.wang <hongbo.wang@....com>
> ---

Can you please explain what is the purpose of the devlink parameter
command? As far as I understand, the commands from step 2 and 3 should
behave like that, even without running the command at step 1.

Thanks,
-Vladimir