bridge: use rx_handler_data pointer to store net_bridge_port pointer

Register net_bridge_port pointer as rx_handler data pointer. As br_port is
removed from struct net_device, another netdev priv_flag is added to indicate
the device serves as a bridge port. Also rcuized pointers are now correctly
dereferenced in br_fdb.c and in netfilter parts.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/net/bridge/br_notify.c b/net/bridge/br_notify.c
index 717e1fd6133c..404d4e14c6a7 100644
--- a/net/bridge/br_notify.c
+++ b/net/bridge/br_notify.c
@@ -32,14 +32,15 @@ struct notifier_block br_device_notifier = {
 static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
 {
         struct net_device *dev = ptr;
-        struct net_bridge_port *p = dev->br_port;
+        struct net_bridge_port *p = br_port_get(dev);
         struct net_bridge *br;
         int err;
 
         /* not a port of a bridge */
-        if (p == NULL)
+        if (!br_port_exists(dev))
                 return NOTIFY_DONE;
 
+        p = br_port_get(dev);
         br = p->br;
 
         switch (event) {