[PATCH net-next v4 05/14] net: bridge: mcast: track active state, foreign IGMP/MLD querier disappearance
From: Linus Lüssing <hidden>
Date: 2026-03-07 04:46:14
Also in:
bridge, linux-kselftest, lkml
Subsystem:
ethernet bridge, networking [general], the rest · Maintainers:
Nikolay Aleksandrov, Ido Schimmel, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This change ensures that the new multicast active state variable is unset again after a foreign IGMP/MLD querier has disappeared (default: 255 seconds). If no new, other IGMP/MLD querier took over then we can't reliably receive IGMP/MLD reports anymore and in turn can't ensure the completeness of our MDB anymore either. No functional change for the fast/data path yet. Signed-off-by: Linus Lüssing <redacted> Reviewed-by: Ido Schimmel <idosch@nvidia.com> --- net/bridge/br_multicast.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 9c22ec63fc6b..64aac9c415e2 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c@@ -1827,6 +1827,10 @@ static void br_multicast_querier_expired(struct net_bridge_mcast *brmctx, br_multicast_start_querier(brmctx, query); out: + /* another IGMP/MLD querier disappeared, set multicast state to inactive + * if our own querier is disabled, too + */ + br_multicast_update_active(brmctx); spin_unlock(&brmctx->br->multicast_lock); }
--
2.53.0