bridge: Add a flag to control unicast packet flood.
Add a flag to control flood of unicast traffic. By default, flood is
on and the bridge will flood unicast traffic if it doesn't know
the destination. When the flag is turned off, unicast traffic
without an FDB will not be forwarded to the specified port.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c
index 7e99366..1b8b8b8 100644
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -65,6 +65,7 @@
struct net_bridge_fdb_entry *dst;
struct net_bridge_mdb_entry *mdst;
struct sk_buff *skb2;
+ bool unicast = true;
u16 vid = 0;
if (!p || p->state == BR_STATE_DISABLED)
@@ -95,9 +96,10 @@
dst = NULL;
- if (is_broadcast_ether_addr(dest))
+ if (is_broadcast_ether_addr(dest)) {
skb2 = skb;
- else if (is_multicast_ether_addr(dest)) {
+ 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 && mdst->mglist) ||
@@ -110,6 +112,7 @@
} else
skb2 = skb;
+ unicast = false;
br->dev->stats.multicast++;
} else if ((dst = __br_fdb_get(br, dest, vid)) &&
dst->is_local) {
@@ -123,7 +126,7 @@
dst->used = jiffies;
br_forward(dst->dst, skb, skb2);
} else
- br_flood_forward(br, skb, skb2);
+ br_flood_forward(br, skb, skb2, unicast);
}
if (skb2)