netdev - Re: [PATCH net-next] net: dsa: Support bridge 802.1Q while untagging

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Message-ID: <89404248-f8ea-b5f5-12c5-a19392397222@gmail.com>
Date:   Wed, 30 Sep 2020 16:29:13 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH net-next] net: dsa: Support bridge 802.1Q while untagging



On 9/30/2020 1:43 PM, Vladimir Oltean wrote:
> On Wed, Sep 30, 2020 at 01:31:03PM -0700, Florian Fainelli wrote:
>> While we are it, call __vlan_find_dev_deep_rcu() which makes use the
>> VLAN group array which is faster.
> 
> Not just "while at it", but I do wonder whether it isn't, in fact,
> called "deep" for a reason:
> 
> 		/*
> 		 * Lower devices of master uppers (bonding, team) do not have
> 		 * grp assigned to themselves. Grp is assigned to upper device
> 		 * instead.
> 		 */
> 
> I haven't tested this, but I wonder if you could actually call
> __vlan_find_dev_deep_rcu() on the switch port interface and it would
> cover both this and the bridge having an 8021q upper automatically?

Let me give this a try.
-- 
Florian