openwrt/target/linux/generic/patches-3.9/642-bridge_port_isolate.patch

--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -157,6 +157,7 @@ struct net_bridge_port
 #define BR_ROOT_BLOCK		0x00000004
 #define BR_MULTICAST_FAST_LEAVE	0x00000008
 #define BR_ADMIN_COST		0x00000010
+#define BR_ISOLATE_MODE		0x00000020
 
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 	u32				multicast_startup_queries_sent;
--- a/net/bridge/br_sysfs_if.c
+++ b/net/bridge/br_sysfs_if.c
@@ -159,6 +159,22 @@ BRPORT_ATTR_FLAG(hairpin_mode, BR_HAIRPI
 BRPORT_ATTR_FLAG(bpdu_guard, BR_BPDU_GUARD);
 BRPORT_ATTR_FLAG(root_block, BR_ROOT_BLOCK);
 
+static ssize_t show_isolate_mode(struct net_bridge_port *p, char *buf)
+{
+	int isolate_mode = (p->flags & BR_ISOLATE_MODE) ? 1 : 0;
+	return sprintf(buf, "%d\n", isolate_mode);
+}
+static ssize_t store_isolate_mode(struct net_bridge_port *p, unsigned long v)
+{
+	if (v)
+		p->flags |= BR_ISOLATE_MODE;
+	else
+		p->flags &= ~BR_ISOLATE_MODE;
+	return 0;
+}
+static BRPORT_ATTR(isolate_mode, S_IRUGO | S_IWUSR,
+		   show_isolate_mode, store_isolate_mode);
+
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
 static ssize_t show_multicast_router(struct net_bridge_port *p, char *buf)
 {
@@ -199,6 +215,7 @@ static const struct brport_attribute *br
 	&brport_attr_multicast_router,
 	&brport_attr_multicast_fast_leave,
 #endif
+	&brport_attr_isolate_mode,
 	NULL
 };
 
--- a/net/bridge/br_input.c
+++ b/net/bridge/br_input.c
@@ -114,8 +114,8 @@ int br_handle_frame_finish(struct sk_buf
 			skb2 = skb;
 
 		br->dev->stats.multicast++;
-	} else if ((dst = __br_fdb_get(br, dest, vid)) &&
-			dst->is_local) {
+	} else if ((p->flags & BR_ISOLATE_MODE) ||
+		   ((dst = __br_fdb_get(br, dest, vid)) && dst->is_local)) {
 		skb2 = skb;
 		/* Do not forward the packet since it's local. */
 		skb = NULL;
--- a/net/bridge/br_forward.c
+++ b/net/bridge/br_forward.c
@@ -119,7 +119,7 @@ void br_deliver(const struct net_bridge_
 /* called with rcu_read_lock */
 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb, struct sk_buff *skb0)
 {
-	if (should_deliver(to, skb)) {
+	if (should_deliver(to, skb) && !(to->flags & BR_ISOLATE_MODE)) {
 		if (skb0)
 			deliver_clone(to, skb, __br_forward);
 		else
@@ -174,7 +174,8 @@ out:
 static void br_flood(struct net_bridge *br, struct sk_buff *skb,
 		     struct sk_buff *skb0,
 		     void (*__packet_hook)(const struct net_bridge_port *p,
-					   struct sk_buff *skb))
+					   struct sk_buff *skb),
+		     bool forward)
 {
 	struct net_bridge_port *p;
 	struct net_bridge_port *prev;
@@ -182,6 +183,9 @@ static void br_flood(struct net_bridge *
 	prev = NULL;
 
 	list_for_each_entry_rcu(p, &br->port_list, list) {
+		if (forward && (p->flags & BR_ISOLATE_MODE))
+			continue;
+
 		prev = maybe_deliver(prev, p, skb, __packet_hook);
 		if (IS_ERR(prev))
 			goto out;
@@ -205,14 +209,14 @@ out:
 /* called with rcu_read_lock */
 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb)
 {
-	br_flood(br, skb, NULL, __br_deliver);
+	br_flood(br, skb, NULL, __br_deliver, false);
 }
 
 /* called under bridge lock */
 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
 		      struct sk_buff *skb2)
 {
-	br_flood(br, skb, skb2, __br_forward);
+	br_flood(br, skb, skb2, __br_forward, true);
 }
 
 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING