+/*
+ * vlan network devices have devices nesting below it, and are a special
+ * "super class" of normal network devices; split their locks off into a
+ * separate class since they always nest.
+ */
+static struct lock_class_key vlan_netdev_xmit_lock_key;
+
+static int vlan_dev_init(struct net_device *dev)
+{
+ struct net_device *real_dev = VLAN_DEV_INFO(dev)->real_dev;
+
+ /* IFF_BROADCAST|IFF_MULTICAST; ??? */
+ dev->flags = real_dev->flags & ~IFF_UP;
+ dev->iflink = real_dev->ifindex;
+ dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) |
+ (1<<__LINK_STATE_DORMANT))) |
+ (1<<__LINK_STATE_PRESENT);
+
+ /* TODO: maybe just assign it to be ETHERNET? */
+ dev->type = real_dev->type;
+
+ memcpy(dev->broadcast, real_dev->broadcast, real_dev->addr_len);
+ memcpy(dev->dev_addr, real_dev->dev_addr, real_dev->addr_len);
+ dev->addr_len = real_dev->addr_len;
+
+ if (real_dev->features & NETIF_F_HW_VLAN_TX) {
+ dev->hard_header = real_dev->hard_header;
+ dev->hard_header_len = real_dev->hard_header_len;
+ dev->hard_start_xmit = vlan_dev_hwaccel_hard_start_xmit;
+ dev->rebuild_header = real_dev->rebuild_header;
+ } else {
+ dev->hard_header = vlan_dev_hard_header;
+ dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN;
+ dev->hard_start_xmit = vlan_dev_hard_start_xmit;
+ dev->rebuild_header = vlan_dev_rebuild_header;
+ }
+ dev->hard_header_parse = real_dev->hard_header_parse;
+
+ lockdep_set_class(&dev->_xmit_lock, &vlan_netdev_xmit_lock_key);
+ return 0;
+}
+