netdev - Re: [PATCH v2 net-next 14/15] net: dsa: sja1105: implement VLAN retagging for dsa

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Date:   Mon, 11 May 2020 20:41:04 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <olteanv@...il.com>, andrew@...n.ch,
        vivien.didelot@...il.com
Cc:     davem@...emloft.net, kuba@...nel.org, jiri@...lanox.com,
        idosch@...sch.org, rmk+kernel@...linux.org.uk,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 net-next 14/15] net: dsa: sja1105: implement VLAN
 retagging for dsa_8021q sub-VLANs



On 5/11/2020 6:53 AM, Vladimir Oltean wrote:
> From: Vladimir Oltean <vladimir.oltean@....com>
> 
> Expand the delta commit procedure for VLANs with additional logic for
> treating bridge_vlans in the newly introduced operating mode,
> SJA1105_VLAN_BEST_EFFORT.
> 
> For every bridge VLAN on every user port, a sub-VLAN index is calculated
> and retagging rules are installed towards a dsa_8021q rx_vid that
> encodes that sub-VLAN index. This way, the tagger can identify the
> original VLANs.
> 
> Extra care is taken for VLANs to still work as intended in cross-chip
> scenarios. Retagging may have unintended consequences for these because
> a sub-VLAN encoding that works for the CPU does not make any sense for a
> front-panel port.
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>
-- 
Florian