From nobody Mon Feb 9 19:26:14 2026 Received: from mail.aperture-lab.de (mail.aperture-lab.de [116.203.183.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2DE0C2D0C7B; Fri, 6 Feb 2026 03:01:44 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=116.203.183.178 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770346905; cv=none; b=IJ/WQgxXsQdUGlLuKDqXsanBq9BePZ4Ccg/UNJrVq3nOG7ehes0Nj8RLEKWpLYaSDn/OFBZuHZ/pxjL/VebU7O55+35fQKfaeZno66A6N4FP/HT8LdTlV8L7uzDV425QGOWyxplZ8hoEMb5eved2n01apuDS1j7c/VOurSlRgHo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770346905; c=relaxed/simple; bh=wUKn8n14dinrn3FJum6dCEkusLQhrS5JLcrSjifh004=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=AqOrYRNVp4K7aZ0Wo1OYnEvig80fK5G3epyctBLoR1xqYGzeqAn+RVHNpYFR41rEqanBU0lXZGliPI6tzFE7uH1s9405h4EjXtxNIZ9ZCnN5Lyfm8R5+HF5T9/R1tbi7M/Jo7IHuKQ9KmZZskO4LHxuF2KLR2A1Cy1HumgS7How= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=c0d3.blue; spf=pass smtp.mailfrom=c0d3.blue; arc=none smtp.client-ip=116.203.183.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=c0d3.blue Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=c0d3.blue Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPSA id 1D17D54CCE1; Fri, 6 Feb 2026 04:01:42 +0100 (CET) From: =?UTF-8?q?Linus=20L=C3=BCssing?= To: bridge@lists.linux.dev Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Nikolay Aleksandrov , Ido Schimmel , Andrew Lunn , Simon Horman , Paolo Abeni , Jakub Kicinski , Eric Dumazet , "David S . Miller" , Kuniyuki Iwashima , Stanislav Fomichev , Xiao Liang , =?UTF-8?q?Linus=20L=C3=BCssing?= Subject: [PATCH net-next v2 06/14] net: bridge: mcast: track active state, IPv6 address availability Date: Fri, 6 Feb 2026 03:52:12 +0100 Message-ID: <20260206030123.5430-7-linus.luessing@c0d3.blue> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260206030123.5430-1-linus.luessing@c0d3.blue> References: <20260206030123.5430-1-linus.luessing@c0d3.blue> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Last-TLS-Session-Version: TLSv1.3 If we are the only potential MLD querier but don't have an IPv6 link-local address configured on our bridge interface then we can't create a valid MLD query and in turn can't reliably receive MLD reports and can't build a complete MDB. Hence disable the new multicast active state variable then. Or reenable it if an IPv6 link-local address became available. No functional change for the fast/data path yet. Signed-off-by: Linus L=C3=BCssing Reviewed-by: Ido Schimmel --- net/bridge/br_multicast.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 0fc29875db9c..a1cde2ba2a3e 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1125,6 +1125,7 @@ static void br_multicast_notify_active(struct net_bri= dge_mcast *brmctx, * The multicast active state is set, per protocol family, if: * * - an IGMP/MLD querier is present + * - for own IPv6 MLD querier: an IPv6 address is configured on the bridge * * And is unset otherwise. * @@ -1222,10 +1223,12 @@ static struct sk_buff *br_ip6_multicast_alloc_query= (struct net_bridge_mcast *brm &ip6h->daddr, 0, &ip6h->saddr)) { kfree_skb(skb); br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, false); + br_multicast_update_active(brmctx); return NULL; } =20 br_opt_toggle(brmctx->br, BROPT_HAS_IPV6_ADDR, true); + br_multicast_update_active(brmctx); ipv6_eth_mc_map(&ip6h->daddr, eth->h_dest); =20 hopopt =3D (u8 *)(ip6h + 1); --=20 2.51.0