+static int is_valid_veth_mtu(int new_mtu)
+{
+ return (new_mtu >= MIN_MTU && new_mtu <= MAX_MTU);
+}
+
+static int veth_change_mtu(struct net_device *dev, int new_mtu)
+{
+ if (!is_valid_veth_mtu(new_mtu))
+ return -EINVAL;
+ dev->mtu = new_mtu;
+ return 0;
+}
+