netdev - Re: [RFC PATCH 1/9] net: dsa: deny enslaving 802.1Q upper to VLAN-aware bridge from PRECHANGEUPPER

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Date:   Sat, 19 Sep 2020 19:33:22 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Vladimir Oltean <vladimir.oltean@....com>, netdev@...r.kernel.org,
        davem@...emloft.net
Cc:     andrew@...n.ch, vivien.didelot@...il.com, idosch@...sch.org,
        jiri@...nulli.us, kurt.kanzenbach@...utronix.de, kuba@...nel.org
Subject: Re: [RFC PATCH 1/9] net: dsa: deny enslaving 802.1Q upper to
 VLAN-aware bridge from PRECHANGEUPPER



On 9/19/2020 6:47 PM, Vladimir Oltean wrote:
> There doesn't seem to be any strong technical reason for doing it this
> way, but we'll be adding more checks for invalid upper device
> configurations, and it will be easier to have them all grouped under
> PRECHANGEUPPER.
> 
> Tested that it still works:
> ip link set br0 type bridge vlan_filtering 1
> ip link add link swp2 name swp2.100 type vlan id 100
> ip link set swp2.100 master br0
> [   20.321312] br0: port 5(swp2.100) entered blocking state
> [   20.326711] br0: port 5(swp2.100) entered disabled state
> Error: dsa_core: Cannot enslave VLAN device into VLAN aware bridge.
> [   20.346549] br0: port 5(swp2.100) entered blocking state
> [   20.351957] br0: port 5(swp2.100) entered disabled state
> 
> Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>

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