kernel: fix a bridge issue that broke WDS client handling in 3.9+

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37341 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 65 insertions, 2 deletions

diff --git a/target/linux/generic/patches-3.9/120-bridge_allow_receiption_on_disabled_port.patch b/target/linux/generic/patches-3.9/120-bridge_allow_receiption_on_disabled_port.patch
new file mode 100644
index 0000000000..5d1661c1b7
--- /dev/null
+++ b/target/linux/generic/patches-3.9/120-bridge_allow_receiption_on_disabled_port.patch
@@ -0,0 +1,54 @@
+From: Stephen Hemminger <stephen@networkplumber.org>
+Subject: bridge: allow receiption on disabled port
+
+When an ethernet device is enslaved to a bridge, and the bridge STP
+detects loss of carrier (or operational state down), then normally
+packet receiption is blocked.
+
+This breaks control applications like WPA which maybe expecting to
+receive packets to negotiate to bring link up. The bridge needs to
+block forwarding packets from these disabled ports, but there is no
+hard requirement to not allow local packet delivery.
+
+Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
+Signed-off-by: Felix Fietkau <nbd@openwrt.org>
+
+--- a/net/bridge/br_input.c
++++ b/net/bridge/br_input.c
+@@ -139,10 +139,14 @@ drop:
+ static int br_handle_local_finish(struct sk_buff *skb)
+ {
+ 	struct net_bridge_port *p = br_port_get_rcu(skb->dev);
+-	u16 vid = 0;
+ 
+-	br_vlan_get_tag(skb, &vid);
+-	br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid);
++	if (p->state != BR_STATE_DISABLED) {
++		u16 vid = 0;
++
++		br_vlan_get_tag(skb, &vid);
++		br_fdb_update(p->br, p, eth_hdr(skb)->h_source, vid);
++	}
++
+ 	return 0;	 /* process further */
+ }
+ 
+@@ -212,6 +216,18 @@ rx_handler_result_t br_handle_frame(stru
+ 
+ forward:
+ 	switch (p->state) {
++	case BR_STATE_DISABLED:
++		if (!ether_addr_equal(p->br->dev->dev_addr, dest))
++			goto drop;
++
++		if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
++			br_handle_local_finish))
++			break;
++
++		BR_INPUT_SKB_CB(skb)->brdev = p->br->dev;
++		br_pass_frame_up(skb);
++		break;
++
+ 	case BR_STATE_FORWARDING:
+ 		rhook = rcu_dereference(br_should_route_hook);
+ 		if (rhook) {
diff --git a/target/linux/generic/patches-3.9/644-bridge_optimize_netfilter_hooks.patch b/target/linux/generic/patches-3.9/644-bridge_optimize_netfilter_hooks.patch
index 8204bba51b..986b3f843b 100644
--- a/target/linux/generic/patches-3.9/644-bridge_optimize_netfilter_hooks.patch
+++ b/target/linux/generic/patches-3.9/644-bridge_optimize_netfilter_hooks.patch
@@ -38,7 +38,7 @@
  		       netif_receive_skb);
  }
  
-@@ -205,7 +205,7 @@ rx_handler_result_t br_handle_frame(stru
+@@ -209,7 +209,7 @@ rx_handler_result_t br_handle_frame(stru
  		}
  
  		/* Deliver packet to local host only */
@@ -47,7 +47,16 @@
  			    NULL, br_handle_local_finish)) {
  			return RX_HANDLER_CONSUMED; /* consumed by filter */
  		} else {
-@@ -230,7 +230,7 @@ forward:
+@@ -224,7 +224,7 @@ forward:
+ 		if (!ether_addr_equal(p->br->dev->dev_addr, dest))
+ 			goto drop;
+ 
+-		if (NF_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
++		if (BR_HOOK(NFPROTO_BRIDGE, NF_BR_PRE_ROUTING, skb, skb->dev, NULL,
+ 			br_handle_local_finish))
+ 			break;
+ 
+@@ -246,7 +246,7 @@ forward:
  		if (ether_addr_equal(p->br->dev->dev_addr, dest))
  			skb->pkt_type = PACKET_HOST;