From: t_jeang <devnull@localhost>
Date: Tue, 6 Jan 2009 12:06:04 +0000 (+0000)
Subject: imported patch bridge-locate-physical-device.patch
X-Git-Tag: privcmd_memop
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=cf4bc50bf92c2f12429f7e1ae1f9c548a2c3de6a;p=xenclient%2Fkernel.git

imported patch bridge-locate-physical-device.patch
---

diff --git a/include/linux/if_bridge.h b/include/linux/if_bridge.h
index fd1b6eb9..cd7ca302 100644
--- a/include/linux/if_bridge.h
+++ b/include/linux/if_bridge.h
@@ -108,6 +108,8 @@ extern void brioctl_set(int (*ioctl_hook)(unsigned int, void __user *));
 extern int (*br_handle_frame_hook)(struct net_bridge_port *p, struct sk_buff **pskb);
 extern int (*br_should_route_hook)(struct sk_buff **pskb);
 
+extern struct net_device *br_locate_physical_device(struct net_device *dev);
+
 #endif
 
 #endif
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index c80ecedd..1c76d910 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -15,6 +15,7 @@
 
 #include <linux/kernel.h>
 #include <linux/netdevice.h>
+#include <linux/etherdevice.h>
 #include <linux/ethtool.h>
 #include <linux/if_arp.h>
 #include <linux/module.h>
@@ -276,6 +277,24 @@ static struct net_bridge_port *new_nbp(struct net_bridge *br,
 	return p;
 }
 
+struct net_device *br_locate_physical_device(struct net_device *dev)
+{
+	struct net_bridge *br;
+	const struct net_bridge_port *p;
+
+	if (!(dev->priv_flags & IFF_EBRIDGE))
+		return dev;
+
+	br = netdev_priv(dev);
+
+	list_for_each_entry(p, &br->port_list, list) {
+		if (!compare_ether_addr(dev->dev_addr, p->dev->dev_addr))
+			return p->dev;
+	}
+	return dev;
+}
+EXPORT_SYMBOL(br_locate_physical_device);
+
 int br_add_bridge(const char *name)
 {
 	struct net_device *dev;