net: introduce default neigh_construct/destroy ndo calls for L2 upper devices

[cascardo/linux.git] / net / core / dev.c

diff --git a/net/core/dev.c b/net/core/dev.c
index a4f3b0a..b92d63b 100644 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -6087,6 +6087,50 @@ void netdev_lower_state_changed(struct net_device *lower_dev,
 }
 EXPORT_SYMBOL(netdev_lower_state_changed);
 
+int netdev_default_l2upper_neigh_construct(struct net_device *dev,
+                                          struct neighbour *n)
+{
+       struct net_device *lower_dev, *stop_dev;
+       struct list_head *iter;
+       int err;
+
+       netdev_for_each_lower_dev(dev, lower_dev, iter) {
+               if (!lower_dev->netdev_ops->ndo_neigh_construct)
+                       continue;
+               err = lower_dev->netdev_ops->ndo_neigh_construct(lower_dev, n);
+               if (err) {
+                       stop_dev = lower_dev;
+                       goto rollback;
+               }
+       }
+       return 0;
+
+rollback:
+       netdev_for_each_lower_dev(dev, lower_dev, iter) {
+               if (lower_dev == stop_dev)
+                       break;
+               if (!lower_dev->netdev_ops->ndo_neigh_destroy)
+                       continue;
+               lower_dev->netdev_ops->ndo_neigh_destroy(lower_dev, n);
+       }
+       return err;
+}
+EXPORT_SYMBOL_GPL(netdev_default_l2upper_neigh_construct);
+
+void netdev_default_l2upper_neigh_destroy(struct net_device *dev,
+                                         struct neighbour *n)
+{
+       struct net_device *lower_dev;
+       struct list_head *iter;
+
+       netdev_for_each_lower_dev(dev, lower_dev, iter) {
+               if (!lower_dev->netdev_ops->ndo_neigh_destroy)
+                       continue;
+               lower_dev->netdev_ops->ndo_neigh_destroy(lower_dev, n);
+       }
+}
+EXPORT_SYMBOL_GPL(netdev_default_l2upper_neigh_destroy);
+
 static void dev_change_rx_flags(struct net_device *dev, int flags)
 {
        const struct net_device_ops *ops = dev->netdev_ops;