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两个基本的数据结构之一：net_device

net_device注册

int register_netdev(struct net_device *dev)	rtnl_lock();	if (strchr(dev->name, '%'))		dev_alloc_name(dev, dev->name);	register_netdevice(dev);	=>int register_netdevice(struct net_device *dev)		//初始化结构体配置		dev->iflink = -1;		if (dev->netdev_ops->ndo_init)			ret = dev->netdev_ops->ndo_init(dev);		ret = dev_get_valid_name(net, dev->name, dev->name, 0);		dev->ifindex = dev_new_index(net);		if (dev->iflink == -1)			dev->iflink = dev->ifindex;		netdev_initialize_kobject(dev);		ret = call_netdevice_notifiers(NETDEV_POST_INIT, dev);		ret = netdev_register_kobject(dev);		dev->reg_state = NETREG_REGISTERED;		//设置初始化状态和队列		set_bit(__LINK_STATE_PRESENT, &dev->state);		dev_init_scheduler(dev);		dev_hold(dev);		list_netdevice(dev);//真正注册，加到3个表里面，一个链表，两个hash表		ret = call_netdevice_notifiers(NETDEV_REGISTER, dev);	rtnl_unlock();

参考文章

Linux eth0, eth1, ..., eth%d 的生成