net: bridge: multicast: use multicast contexts instead of bridge or port

Pass multicast context pointers to multicast functions instead of bridge/port.
This would make it easier later to switch these contexts to their per-vlan
versions. The patch is basically search and replace, no functional changes.

Signed-off-by: Nikolay Aleksandrov <nikolay@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_device.c

@@ -28,6 +28,7 @@ EXPORT_SYMBOL_GPL(nf_br_ops);
 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 {
 	struct net_bridge *br = netdev_priv(dev);
+	struct net_bridge_mcast *brmctx = &br->multicast_ctx;
 	struct net_bridge_fdb_entry *dst;
 	struct net_bridge_mdb_entry *mdst;
 	const struct nf_br_ops *nf_ops;
@@ -82,15 +83,15 @@ netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev)
 			br_flood(br, skb, BR_PKT_MULTICAST, false, true);
 			goto out;
 		}
-		if (br_multicast_rcv(br, NULL, skb, vid)) {
+		if (br_multicast_rcv(brmctx, NULL, skb, vid)) {
 			kfree_skb(skb);
 			goto out;
 		}
 
-		mdst = br_mdb_get(br, skb, vid);
+		mdst = br_mdb_get(brmctx, skb, vid);
 		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
-		    br_multicast_querier_exists(br, eth_hdr(skb), mdst))
-			br_multicast_flood(mdst, skb, false, true);
+		    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);
 	} else if ((dst = br_fdb_find_rcu(br, dest, vid)) != NULL) {

net/bridge/br_forward.c

@@ -267,20 +267,19 @@ static void maybe_deliver_addr(struct net_bridge_port *p, struct sk_buff *skb,
 /* called with rcu_read_lock */
 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
 			struct sk_buff *skb,
+			struct net_bridge_mcast *brmctx,
 			bool local_rcv, bool local_orig)
 {
-	struct net_device *dev = BR_INPUT_SKB_CB(skb)->brdev;
-	struct net_bridge *br = netdev_priv(dev);
 	struct net_bridge_port *prev = NULL;
 	struct net_bridge_port_group *p;
 	bool allow_mode_include = true;
 	struct hlist_node *rp;
 
-	rp = br_multicast_get_first_rport_node(br, skb);
+	rp = br_multicast_get_first_rport_node(brmctx, skb);
 
 	if (mdst) {
 		p = rcu_dereference(mdst->ports);
-		if (br_multicast_should_handle_mode(br, mdst->addr.proto) &&
+		if (br_multicast_should_handle_mode(brmctx, mdst->addr.proto) &&
 		    br_multicast_is_star_g(&mdst->addr))
 			allow_mode_include = false;
 	} else {

net/bridge/br_input.c

@@ -69,15 +69,19 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
 	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
 	enum br_pkt_type pkt_type = BR_PKT_UNICAST;
 	struct net_bridge_fdb_entry *dst = NULL;
+	struct net_bridge_mcast_port *pmctx;
 	struct net_bridge_mdb_entry *mdst;
 	bool local_rcv, mcast_hit = false;
+	struct net_bridge_mcast *brmctx;
 	struct net_bridge *br;
 	u16 vid = 0;
 	u8 state;
 
 	if (!p || p->state == BR_STATE_DISABLED)
 		goto drop;
 
+	brmctx = &p->br->multicast_ctx;
+	pmctx = &p->multicast_ctx;
 	state = p->state;
 	if (!br_allowed_ingress(p->br, nbp_vlan_group_rcu(p), skb, &vid,
 				&state))
@@ -98,7 +102,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
 			local_rcv = true;
 		} else {
 			pkt_type = BR_PKT_MULTICAST;
-			if (br_multicast_rcv(br, p, skb, vid))
+			if (br_multicast_rcv(brmctx, pmctx, skb, vid))
 				goto drop;
 		}
 	}
@@ -128,11 +132,11 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
 
 	switch (pkt_type) {
 	case BR_PKT_MULTICAST:
-		mdst = br_mdb_get(br, skb, vid);
+		mdst = br_mdb_get(brmctx, skb, vid);
 		if ((mdst || BR_INPUT_SKB_CB_MROUTERS_ONLY(skb)) &&
-		    br_multicast_querier_exists(br, eth_hdr(skb), mdst)) {
+		    br_multicast_querier_exists(brmctx, eth_hdr(skb), mdst)) {
 			if ((mdst && mdst->host_joined) ||
-			    br_multicast_is_router(br, skb)) {
+			    br_multicast_is_router(brmctx, skb)) {
 				local_rcv = true;
 				br->dev->stats.multicast++;
 			}
@@ -162,7 +166,7 @@ int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb
 		if (!mcast_hit)
 			br_flood(br, skb, pkt_type, local_rcv, false);
 		else
-			br_multicast_flood(mdst, skb, local_rcv, false);
+			br_multicast_flood(mdst, skb, brmctx, local_rcv, false);
 	}
 
 	if (local_rcv)

net/bridge/br_mdb.c

@@ -1092,7 +1092,7 @@ static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
 	 * a new INCLUDE port (S,G) then all of *,G EXCLUDE ports need to be
 	 * added to it for proper replication
 	 */
-	if (br_multicast_should_handle_mode(br, group.proto)) {
+	if (br_multicast_should_handle_mode(&br->multicast_ctx, group.proto)) {
 		switch (filter_mode) {
 		case MCAST_EXCLUDE:
 			br_multicast_star_g_handle_mode(p, MCAST_EXCLUDE);