linux-kernel - Re: [PATCH net-next v2 04/14] net: bridge: mcast: track active state, IGMP/MLD querier appearance

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Message-ID: <20260208160746.GD154003@shredder>
Date: Sun, 8 Feb 2026 18:07:46 +0200
From: Ido Schimmel <idosch@...dia.com>
To: Linus Lüssing <linus.luessing@...3.blue>
Cc: bridge@...ts.linux.dev, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Nikolay Aleksandrov <razor@...ckwall.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	Simon Horman <horms@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	"David S . Miller" <davem@...emloft.net>,
	Kuniyuki Iwashima <kuniyu@...gle.com>,
	Stanislav Fomichev <sdf@...ichev.me>,
	Xiao Liang <shaw.leon@...il.com>
Subject: Re: [PATCH net-next v2 04/14] net: bridge: mcast: track active
 state, IGMP/MLD querier appearance

On Fri, Feb 06, 2026 at 03:52:10AM +0100, Linus Lüssing wrote:
> +static void br_multicast_notify_active(struct net_bridge_mcast *brmctx,
> +				       bool ip4_active_old, bool ip6_active_old)
> +{
> +	if (brmctx->ip4_active == ip4_active_old &&
> +	    brmctx->ip6_active == ip6_active_old)
> +		return;
> +
> +	br_info(brmctx->br, "mc_active changed, vid: %i: v4: %i->%i, v6: %i->%i\n",
> +		brmctx->vlan ? brmctx->vlan->vid : -1,
> +		ip4_active_old, brmctx->ip4_active,
> +		ip6_active_old, brmctx->ip6_active);

Make this br_debug() to avoid spamming the kernel log?

I am aware that this can also be notified over netlink, but it will add
extra complexity and I am not sure anyone will use, so it might be best
to defer it for now.

> +}