From mboxrd@z Thu Jan 1 00:00:00 1970 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 D3ECF319871; Mon, 2 Mar 2026 05:40:53 +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=1772430056; cv=none; b=FHzA/ES41Z/9b/8lTgx1wr56P5Sc8BJ6iS0mtO24M4DJFMfp9TrF1p017BwDqbKtU8p31xBgV+slEzeGAdJinC+YhBpENfrSHN+F9rEZt+1bgcGzzpn74ivvlbMsBzHhbU/oaOqc4CgSD8uxsgNpe3Uvy+SOgwzE8O9K53ny1KY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772430056; c=relaxed/simple; bh=69GiURr/LTY5cK+XpvRYlU7l/pOvKG8gtu+iPoUISBU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=jcUtm7FhIDAt96Nc6L4VxSY/JL6QzkOQPhq0WuSOpTWFvP+6JujTIvw/KRV3S6P/mH35B3uGqoFb+qra/sFW74IS9woygOtQ8p/vzBfiUdvCiAyEAUCoOJUKhhYsbdTWLVAzR3tNK2vENXBkH7Dgzzmaz/Lhcksb7Yn2kXhYcVY= 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 97F3254CC69; Mon, 2 Mar 2026 06:40:51 +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, linux-kselftest@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 , shuah@kernel.org, =?UTF-8?q?Linus=20L=C3=BCssing?= Subject: [PATCH net-next v3 08/14] net: bridge: mcast: track active state, if snooping is enabled Date: Mon, 2 Mar 2026 06:40:02 +0100 Message-ID: <20260302054008.21638-9-linus.luessing@c0d3.blue> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260302054008.21638-1-linus.luessing@c0d3.blue> References: <20260302054008.21638-1-linus.luessing@c0d3.blue> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Last-TLS-Session-Version: TLSv1.3 To be able to use the upcoming SWITCHDEV_ATTR_ID_BRIDGE_MC_ACTIVE as a potential replacement for SWITCHDEV_ATTR_ID_BRIDGE_MC_DISABLED also check and toggle the active state if multicast snooping is enabled or disabled. So that MC_ACTIVE not only checks the querier state, but also if multicast snooping is enabled in general. No functional change for the fast/data path yet. Signed-off-by: Linus Lüssing --- include/uapi/linux/if_link.h | 6 ++++-- net/bridge/br_multicast.c | 15 +++++++++++++-- 2 files changed, 17 insertions(+), 4 deletions(-) diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index 66c59953d301..d963be8679b5 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -748,12 +748,14 @@ enum in6_addr_gen_mode { * @IFLA_BR_MCAST_ACTIVE_V4 * Bridge IPv4 mcast active state, read only. * - * 1 if an IGMP querier is present, 0 otherwise. + * 1 if *IFLA_BR_MCAST_SNOOPING* is enabled and an IGMP querier is present, + * 0 otherwise. * * @IFLA_BR_MCAST_ACTIVE_V6 * Bridge IPv6 mcast active state, read only. * - * 1 if an MLD querier is present, 0 otherwise. + * 1 if *IFLA_BR_MCAST_SNOOPING* is enabled and an MLD querier is present, + * 0 otherwise. */ enum { IFLA_BR_UNSPEC, diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c index 6c4b239c70eb..7887ed9af53a 100644 --- a/net/bridge/br_multicast.c +++ b/net/bridge/br_multicast.c @@ -1122,6 +1122,7 @@ static void br_multicast_notify_active(struct net_bridge_mcast *brmctx, * * The multicast active state is set, per protocol family, if: * + * - multicast snooping is enabled * - an IGMP/MLD querier is present * - for own IPv6 MLD querier: an IPv6 link-local address is configured on the bridge * @@ -1137,6 +1138,9 @@ static void br_multicast_update_active(struct net_bridge_mcast *brmctx) lockdep_assert_held_once(&brmctx->br->multicast_lock); + if (!br_opt_get(brmctx->br, BROPT_MULTICAST_ENABLED)) + force_inactive = true; + br_ip4_multicast_update_active(brmctx, force_inactive); br_ip6_multicast_update_active(brmctx, force_inactive); @@ -1351,6 +1355,12 @@ static struct sk_buff *br_multicast_alloc_query(struct net_bridge_mcast *brmctx, return NULL; } +static void br_multicast_toggle_enabled(struct net_bridge *br, bool on) +{ + br_opt_toggle(br, BROPT_MULTICAST_ENABLED, on); + br_multicast_update_active(&br->multicast_ctx); +} + struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, struct br_ip *group) { @@ -1364,7 +1374,7 @@ struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br, if (atomic_read(&br->mdb_hash_tbl.nelems) >= br->hash_max) { trace_br_mdb_full(br->dev, group); br_mc_disabled_update(br->dev, false, NULL); - br_opt_toggle(br, BROPT_MULTICAST_ENABLED, false); + br_multicast_toggle_enabled(br, false); return ERR_PTR(-E2BIG); } @@ -4827,7 +4837,8 @@ int br_multicast_toggle(struct net_bridge *br, unsigned long val, if (err) goto unlock; - br_opt_toggle(br, BROPT_MULTICAST_ENABLED, !!val); + br_multicast_toggle_enabled(br, !!val); + if (!br_opt_get(br, BROPT_MULTICAST_ENABLED)) { change_snoopers = true; br_multicast_del_grps(br); -- 2.51.0