linux-kernel - Re: [PATCH v6 net-next 05/14] bridge: Add filling forward path from port to port

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Message-ID: <91d709aa-2414-4fb4-b3e1-94e0e330d33c@blackwall.org>
Date: Tue, 11 Feb 2025 18:00:05 +0200
From: Nikolay Aleksandrov <razor@...ckwall.org>
To: Vladimir Oltean <olteanv@...il.com>, Eric Woudstra <ericwouds@...il.com>
Cc: "David S. Miller" <davem@...emloft.net>,
 Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
 Andrew Lunn <andrew+netdev@...n.ch>, Pablo Neira Ayuso
 <pablo@...filter.org>, Jozsef Kadlecsik <kadlec@...filter.org>,
 Jiri Pirko <jiri@...nulli.us>, Ivan Vecera <ivecera@...hat.com>,
 Roopa Prabhu <roopa@...dia.com>, Matthias Brugger <matthias.bgg@...il.com>,
 AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
 Kuniyuki Iwashima <kuniyu@...zon.com>,
 Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
 Lorenzo Bianconi <lorenzo@...nel.org>, Joe Damato <jdamato@...tly.com>,
 Alexander Lobakin <aleksander.lobakin@...el.com>,
 Frank Wunderlich <frank-w@...lic-files.de>,
 Daniel Golle <daniel@...rotopia.org>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, netfilter-devel@...r.kernel.org,
 coreteam@...filter.org, bridge@...ts.linux.dev,
 linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v6 net-next 05/14] bridge: Add filling forward path from
 port to port

On 2/11/25 15:28, Vladimir Oltean wrote:
> On Sun, Feb 09, 2025 at 12:10:25PM +0100, Eric Woudstra wrote:
>> @@ -1453,7 +1454,10 @@ void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
>>  	if (!br_opt_get(br, BROPT_VLAN_ENABLED))
>>  		return;
>>  
>> -	vg = br_vlan_group(br);
>> +	if (p)
>> +		vg = nbp_vlan_group(p);
>> +	else
>> +		vg = br_vlan_group(br);
>>  
>>  	if (idx >= 0 &&
>>  	    ctx->vlan[idx].proto == br->vlan_proto) {
> 
> I think the original usage of br_vlan_group() here was incorrect, and so
> is the new usage of nbp_vlan_group(). They should be br_vlan_group_rcu()
> and nbp_vlan_group_rcu().
> 

Oops, right. Nice catch!