bridge: make br_device_notifier static

[karo-tx-linux.git] / net / bridge / br.c

diff --git a/net/bridge/br.c b/net/bridge/br.c
index 19311aafcf5a06e6ae7abaaf82527711573dc6d6..1a755a1e54101d924e88ea240a82c154dcb7bbe5 100644 (file)
--- a/net/bridge/br.c
+++ b/net/bridge/br.c
@@ -22,6 +22,104 @@
 
 #include "br_private.h"
 
+/*
+ * Handle changes in state of network devices enslaved to a bridge.
+ *
+ * Note: don't care about up/down if bridge itself is down, because
+ *     port state is checked when bridge is brought up.
+ */
+static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
+{
+       struct net_device *dev = netdev_notifier_info_to_dev(ptr);
+       struct net_bridge_port *p;
+       struct net_bridge *br;
+       bool changed_addr;
+       int err;
+
+       /* register of bridge completed, add sysfs entries */
+       if ((dev->priv_flags & IFF_EBRIDGE) && event == NETDEV_REGISTER) {
+               br_sysfs_addbr(dev);
+               return NOTIFY_DONE;
+       }
+
+       /* not a port of a bridge */
+       p = br_port_get_rtnl(dev);
+       if (!p)
+               return NOTIFY_DONE;
+
+       br = p->br;
+
+       switch (event) {
+       case NETDEV_CHANGEMTU:
+               dev_set_mtu(br->dev, br_min_mtu(br));
+               break;
+
+       case NETDEV_CHANGEADDR:
+               spin_lock_bh(&br->lock);
+               br_fdb_changeaddr(p, dev->dev_addr);
+               changed_addr = br_stp_recalculate_bridge_id(br);
+               spin_unlock_bh(&br->lock);
+
+               if (changed_addr)
+                       call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
+
+               break;
+
+       case NETDEV_CHANGE:
+               br_port_carrier_check(p);
+               break;
+
+       case NETDEV_FEAT_CHANGE:
+               netdev_update_features(br->dev);
+               break;
+
+       case NETDEV_DOWN:
+               spin_lock_bh(&br->lock);
+               if (br->dev->flags & IFF_UP)
+                       br_stp_disable_port(p);
+               spin_unlock_bh(&br->lock);
+               break;
+
+       case NETDEV_UP:
+               if (netif_running(br->dev) && netif_oper_up(dev)) {
+                       spin_lock_bh(&br->lock);
+                       br_stp_enable_port(p);
+                       spin_unlock_bh(&br->lock);
+               }
+               break;
+
+       case NETDEV_UNREGISTER:
+               br_del_if(br, dev);
+               break;
+
+       case NETDEV_CHANGENAME:
+               err = br_sysfs_renameif(p);
+               if (err)
+                       return notifier_from_errno(err);
+               break;
+
+       case NETDEV_PRE_TYPE_CHANGE:
+               /* Forbid underlaying device to change its type. */
+               return NOTIFY_BAD;
+
+       case NETDEV_RESEND_IGMP:
+               /* Propagate to master device */
+               call_netdevice_notifiers(event, br->dev);
+               break;
+       }
+
+       /* Events that may cause spanning tree to refresh */
+       if (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
+           event == NETDEV_CHANGE || event == NETDEV_DOWN)
+               br_ifinfo_notify(RTM_NEWLINK, p);
+
+       return NOTIFY_DONE;
+}
+
+static struct notifier_block br_device_notifier = {
+       .notifier_call = br_device_event
+};
+
 static void __net_exit br_net_exit(struct net *net)
 {
        struct net_device *dev;