bridge: Pass VLAN ID to br_flood()

Subsequent patches are going to add per-{Port, VLAN} neighbor
suppression, which will require br_flood() to potentially suppress ARP /
NS packets on a per-{Port, VLAN} basis.

As a preparation, pass the VLAN ID of the packet as another argument to
br_flood().
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_device.c

@@ -80,10 +80,10 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 
 	dest = eth_hdr(skb)->h_dest;
 	if (is_broadcast_ether_addr(dest)) {
-		br_flood(br, skb, BR_PKT_BROADCAST, false, true);
+		br_flood(br, skb, BR_PKT_BROADCAST, false, true, vid);
 	} else if (is_multicast_ether_addr(dest)) {
 		if (unlikely(netpoll_tx_running(dev))) {
-			br_flood(br, skb, BR_PKT_MULTICAST, false, true);
+			br_flood(br, skb, BR_PKT_MULTICAST, false, true, vid);
 			goto out;
 		}
 		if (br_multicast_rcv(&brmctx, &pmctx_null, vlan, skb, vid)) {
@@ -96,11 +96,11 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 		    br_multicast_querier_exists(brmctx, eth_hdr(skb), mdst))
 			br_multicast_flood(mdst, skb, brmctx, false, true);
 		else
-			br_flood(br, skb, BR_PKT_MULTICAST, false, true);
+			br_flood(br, skb, BR_PKT_MULTICAST, false, true, vid);
 	} else if ((dst = br_fdb_find_rcu(br, dest, vid)) != NULL) {
 		br_forward(dst->dst, skb, false, true);
 	} else {
-		br_flood(br, skb, BR_PKT_UNICAST, false, true);
+		br_flood(br, skb, BR_PKT_UNICAST, false, true, vid);
 	}
 out:
 	rcu_read_unlock();

net/bridge/br_forward.c

@@ -197,7 +197,8 @@ static struct net_bridge_port *maybe_deliver(
 
 /* called under rcu_read_lock */
 void br_flood(struct net_bridge *br, struct sk_buff *skb,
-	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig)
+	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
+	      u16 vid)
 {
 	struct net_bridge_port *prev = NULL;
 	struct net_bridge_port *p;

net/bridge/br_input.c

@@ -207,7 +207,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
 		br_forward(dst->dst, skb, local_rcv, false);
 	} else {
 		if (!mcast_hit)
-			br_flood(br, skb, pkt_type, local_rcv, false);
+			br_flood(br, skb, pkt_type, local_rcv, false, vid);
 		else
 			br_multicast_flood(mdst, skb, brmctx, local_rcv, false);
 	}

net/bridge/br_private.h

@@ -849,7 +849,8 @@ void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
 		bool local_rcv, bool local_orig);
 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
 void br_flood(struct net_bridge *br, struct sk_buff *skb,
-	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
+	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
+	      u16 vid);
 
 /* return true if both source port and dest port are isolated */
 static inline bool br_skb_isolated(const struct net_bridge_port *to,