kernel: add a patch for isolating individual bridge ports

SVN-Revision: 25762

1 files changed, 103 insertions, 0 deletions

diff --git a/target/linux/generic/patches-2.6.37/300-bridge_port_isolate.patch b/target/linux/generic/patches-2.6.37/300-bridge_port_isolate.patch
new file mode 100644
index 0000000000..de1cac60e1
--- /dev/null
+++ b/target/linux/generic/patches-2.6.37/300-bridge_port_isolate.patch
@@ -0,0 +1,103 @@
+--- a/net/bridge/br_private.h
++++ b/net/bridge/br_private.h
+@@ -132,6 +132,7 @@ struct net_bridge_port
+ 
+ 	unsigned long 			flags;
+ #define BR_HAIRPIN_MODE		0x00000001
++#define BR_ISOLATE_MODE		0x00000002
+ 
+ #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 @@ static ssize_t store_hairpin_mode(struct
+ static BRPORT_ATTR(hairpin_mode, S_IRUGO | S_IWUSR,
+ 		   show_hairpin_mode, store_hairpin_mode);
+ 
++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)
+ {
+@@ -191,6 +207,7 @@ static struct brport_attribute *brport_a
+ 	&brport_attr_hold_timer,
+ 	&brport_attr_flush,
+ 	&brport_attr_hairpin_mode,
++	&brport_attr_isolate_mode,
+ #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
+ 	&brport_attr_multicast_router,
+ #endif
+--- a/net/bridge/br_input.c
++++ b/net/bridge/br_input.c
+@@ -91,7 +91,8 @@ int br_handle_frame_finish(struct sk_buf
+ 			skb2 = skb;
+ 
+ 		br->dev->stats.multicast++;
+-	} else if ((dst = __br_fdb_get(br, dest)) && dst->is_local) {
++	} else if ((p->flags & BR_ISOLATE_MODE) ||
++		   ((dst = __br_fdb_get(br, dest)) && 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
+@@ -113,7 +113,7 @@ 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
+@@ -168,7 +168,8 @@ 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;
+@@ -176,6 +177,9 @@ 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;
+@@ -199,14 +203,14 @@ 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