From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../patches-4.3/642-bridge_port_isolate.patch      | 107 +++++++++++++++++++++
 1 file changed, 107 insertions(+)
 create mode 100644 target/linux/generic/patches-4.3/642-bridge_port_isolate.patch

(limited to 'target/linux/generic/patches-4.3/642-bridge_port_isolate.patch')

diff --git a/target/linux/generic/patches-4.3/642-bridge_port_isolate.patch b/target/linux/generic/patches-4.3/642-bridge_port_isolate.patch
new file mode 100644
index 0000000..9f9c03a
--- /dev/null
+++ b/target/linux/generic/patches-4.3/642-bridge_port_isolate.patch
@@ -0,0 +1,107 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Subject: [PATCH] bridge: port isolate
+
+Isolating individual bridge ports
+---
+--- a/include/linux/if_bridge.h
++++ b/include/linux/if_bridge.h
+@@ -45,6 +45,7 @@ struct br_ip_list {
+ #define BR_PROXYARP		BIT(8)
+ #define BR_LEARNING_SYNC	BIT(9)
+ #define BR_PROXYARP_WIFI	BIT(10)
++#define BR_ISOLATE_MODE	BIT(11)
+ 
+ extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *));
+ 
+--- a/net/bridge/br_sysfs_if.c
++++ b/net/bridge/br_sysfs_if.c
+@@ -173,6 +173,22 @@ BRPORT_ATTR_FLAG(unicast_flood, BR_FLOOD
+ BRPORT_ATTR_FLAG(proxyarp, BR_PROXYARP);
+ BRPORT_ATTR_FLAG(proxyarp_wifi, BR_PROXYARP_WIFI);
+ 
++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)
+ {
+@@ -217,6 +233,7 @@ static const struct brport_attribute *br
+ #endif
+ 	&brport_attr_proxyarp,
+ 	&brport_attr_proxyarp_wifi,
++	&brport_attr_isolate_mode,
+ 	NULL
+ };
+ 
+--- a/net/bridge/br_input.c
++++ b/net/bridge/br_input.c
+@@ -185,8 +185,8 @@ int br_handle_frame_finish(struct sock *
+ 
+ 		unicast = false;
+ 		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
+@@ -134,7 +134,7 @@ EXPORT_SYMBOL_GPL(br_deliver);
+ /* 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
+@@ -190,7 +190,7 @@ static void br_flood(struct net_bridge *
+ 		     struct sk_buff *skb0,
+ 		     void (*__packet_hook)(const struct net_bridge_port *p,
+ 					   struct sk_buff *skb),
+-		     bool unicast)
++		     				bool unicast, bool forward)
+ {
+ 	struct net_bridge_port *p;
+ 	struct net_bridge_port *prev;
+@@ -198,6 +198,8 @@ 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;
+ 		/* Do not flood unicast traffic to ports that turn it off */
+ 		if (unicast && !(p->flags & BR_FLOOD))
+ 			continue;
+@@ -232,14 +234,14 @@ out:
+ /* called with rcu_read_lock */
+ void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast)
+ {
+-	br_flood(br, skb, NULL, __br_deliver, unicast);
++	br_flood(br, skb, NULL, __br_deliver, unicast, false);
+ }
+ 
+ /* called under bridge lock */
+ void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
+ 		      struct sk_buff *skb2, bool unicast)
+ {
+-	br_flood(br, skb, skb2, __br_forward, unicast);
++	br_flood(br, skb, skb2, __br_forward, unicast, true);
+ }
+ 
+ #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
-- 
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