diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c
index 2ef66781fedb3a9211448fa3db73eedab2c7d8a2..69363bd37f64ae016441df793e0f66ea3487bbb8 100644
--- a/net/bridge/br_device.c
+++ b/net/bridge/br_device.c
@@ -70,7 +70,8 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
}
mdst = br_mdb_get(br, skb, vid);
- if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb))
+ if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
+ br_multicast_querier_exists(br))
br_multicast_deliver(mdst, skb);
else
br_flood_deliver(br, skb, false);
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 1b8b8b824cd766b05665e1d89f0e1394abdfbe2f..8c561c0aa636e49615b13e267c98e4e5bdce1a23 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -101,7 +101,8 @@ int br_handle_frame_finish(struct sk_buff *skb)
unicast = false;
} else if (is_multicast_ether_addr(dest)) {
mdst = br_mdb_get(br, skb, vid);
- if (mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) {
+ if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
+ br_multicast_querier_exists(br)) {
if ((mdst && mdst->mglist) ||
br_multicast_is_router(br))
skb2 = skb;
diff --git a/net/bridge/br_multicast.c b/net/bridge/br_multicast.c
index 4b99c9a27044e1ce1988ababe9b7c65b1ff425b7..61c5e819380e52d6347cde7186251467e921c1a0 100644
--- a/net/bridge/br_multicast.c
+++ b/net/bridge/br_multicast.c
@@ -1014,6 +1014,16 @@ static int br_ip6_multicast_mld2_report(struct net_bridge *br,
}
#endif
+static void br_multicast_update_querier_timer(struct net_bridge *br,
+ unsigned long max_delay)
+{
+ if (!timer_pending(&br->multicast_querier_timer))
+ br->multicast_querier_delay_time = jiffies + max_delay;
+
+ mod_timer(&br->multicast_querier_timer,
+ jiffies + br->multicast_querier_interval);
+}
+
/*
* Add port to router_list
* list is maintained ordered by pointer value
@@ -1064,11 +1074,11 @@ static void br_multicast_mark_router(struct net_bridge *br,
static void br_multicast_query_received(struct net_bridge *br,
struct net_bridge_port *port,
- int saddr)
+ int saddr,
+ unsigned long max_delay)
{
if (saddr)
- mod_timer(&br->multicast_querier_timer,
- jiffies + br->multicast_querier_interval);
+ br_multicast_update_querier_timer(br, max_delay);
else if (timer_pending(&br->multicast_querier_timer))
return;
@@ -1096,8 +1106,6 @@ static int br_ip4_multicast_query(struct net_bridge *br,
(port && port->state == BR_STATE_DISABLED))
goto out;
- br_multicast_query_received(br, port, !!iph->saddr);
-
group = ih->group;
if (skb->len == sizeof(*ih)) {
@@ -1121,6 +1129,8 @@ static int br_ip4_multicast_query(struct net_bridge *br,
IGMPV3_MRC(ih3->code) * (HZ / IGMP_TIMER_SCALE) : 1;
}
+ br_multicast_query_received(br, port, !!iph->saddr, max_delay);
+
if (!group)
goto out;
@@ -1176,8 +1186,6 @@ static int br_ip6_multicast_query(struct net_bridge *br,
(port && port->state == BR_STATE_DISABLED))
goto out;
- br_multicast_query_received(br, port, !ipv6_addr_any(&ip6h->saddr));
-
if (skb->len == sizeof(*mld)) {
if (!pskb_may_pull(skb, sizeof(*mld))) {
err = -EINVAL;
@@ -1198,6 +1206,9 @@ static int br_ip6_multicast_query(struct net_bridge *br,
max_delay = mld2q->mld2q_mrc ? MLDV2_MRC(ntohs(mld2q->mld2q_mrc)) : 1;
}
+ br_multicast_query_received(br, port, !ipv6_addr_any(&ip6h->saddr),
+ max_delay);
+
if (!group)
goto out;
@@ -1643,6 +1654,8 @@ void br_multicast_init(struct net_bridge *br)
br->multicast_querier_interval = 255 * HZ;
br->multicast_membership_interval = 260 * HZ;
+ br->multicast_querier_delay_time = 0;
+
spin_lock_init(&br->multicast_lock);
setup_timer(&br->multicast_router_timer,
br_multicast_local_router_expired, 0);
@@ -1831,6 +1844,8 @@ int br_multicast_toggle(struct net_bridge *br, unsigned long val)
int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
{
+ unsigned long max_delay;
+
val = !!val;
spin_lock_bh(&br->multicast_lock);
@@ -1838,8 +1853,14 @@ int br_multicast_set_querier(struct net_bridge *br, unsigned long val)
goto unlock;
br->multicast_querier = val;
- if (val)
- br_multicast_start_querier(br);
+ if (!val)
+ goto unlock;
+
+ max_delay = br->multicast_query_response_interval;
+ if (!timer_pending(&br->multicast_querier_timer))
+ br->multicast_querier_delay_time = jiffies + max_delay;
+
+ br_multicast_start_querier(br);
unlock:
spin_unlock_bh(&br->multicast_lock);
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index 3be89b3ce17b5a314215609790cadec6e5453727..2f7da41851bffc64d20c0de3db6977a800718747 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -267,6 +267,7 @@ struct net_bridge
unsigned long multicast_query_interval;
unsigned long multicast_query_response_interval;
unsigned long multicast_startup_query_interval;
+ unsigned long multicast_querier_delay_time;
spinlock_t multicast_lock;
struct net_bridge_mdb_htable __rcu *mdb;
@@ -501,6 +502,13 @@ static inline bool br_multicast_is_router(struct net_bridge *br)
(br->multicast_router == 1 &&
timer_pending(&br->multicast_router_timer));
}
+
+static inline bool br_multicast_querier_exists(struct net_bridge *br)
+{
+ return time_is_before_jiffies(br->multicast_querier_delay_time) &&
+ (br->multicast_querier ||
+ timer_pending(&br->multicast_querier_timer));
+}
#else
static inline int br_multicast_rcv(struct net_bridge *br,
struct net_bridge_port *port,
@@ -557,6 +565,10 @@ static inline bool br_multicast_is_router(struct net_bridge *br)
{
return 0;
}
+static inline bool br_multicast_querier_exists(struct net_bridge *br)
+{
+ return false;
+}
static inline void br_mdb_init(void)
{
}