text: #ifndef _LINUX_IF_MACVLAN_H
  #define _LINUX_IF_MACVLAN_H
  
  #include <linux/if_link.h>
  #include <linux/list.h>
  #include <linux/netdevice.h>
  #include <linux/netlink.h>
  #include <net/netlink.h>
  
  #if defined(CONFIG_MACVTAP) || defined(CONFIG_MACVTAP_MODULE)
  struct socket *macvtap_get_socket(struct file *);
  #else
  #include <linux/err.h>
  #include <linux/errno.h>
  struct file;
  struct socket;
  static inline struct socket *macvtap_get_socket(struct file *f)
  {
  	return ERR_PTR(-EINVAL);
  }
  #endif /* CONFIG_MACVTAP */
  
  struct macvlan_port;
  struct macvtap_queue;
  
  /**
   *	struct macvlan_rx_stats - MACVLAN percpu rx stats
   *	@rx_packets: number of received packets
   *	@rx_bytes: number of received bytes
   *	@multicast: number of received multicast packets
   *	@rx_errors: number of errors
   */
  struct macvlan_rx_stats {
  	unsigned long rx_packets;
  	unsigned long rx_bytes;
  	unsigned long multicast;
  	unsigned long rx_errors;
  };
  
  struct macvlan_dev {
  	struct net_device	*dev;
  	struct list_head	list;
  	struct hlist_node	hlist;
  	struct macvlan_port	*port;
  	struct net_device	*lowerdev;
  	struct macvlan_rx_stats __percpu *rx_stats;
  	enum macvlan_mode	mode;
  	int (*receive)(struct sk_buff *skb);
  	int (*forward)(struct net_device *dev, struct sk_buff *skb);
  	struct macvtap_queue	*tap;
  };
  
  static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
  				    unsigned int len, bool success,
  				    bool multicast)
  {
  	struct macvlan_rx_stats *rx_stats;
  
  	rx_stats = per_cpu_ptr(vlan->rx_stats, smp_processor_id());
  	if (likely(success)) {
  		rx_stats->rx_packets++;;
  		rx_stats->rx_bytes += len;
  		if (multicast)
  			rx_stats->multicast++;
  	} else {
  		rx_stats->rx_errors++;
  	}
  }
  
  extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
  				  struct nlattr *tb[], struct nlattr *data[],
  				  int (*receive)(struct sk_buff *skb),
  				  int (*forward)(struct net_device *dev,
  						 struct sk_buff *skb));
  
  extern void macvlan_count_rx(const struct macvlan_dev *vlan,
  			     unsigned int len, bool success,
  			     bool multicast);
  
  extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
  
  extern int macvlan_link_register(struct rtnl_link_ops *ops);
  
  extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
  				      struct net_device *dev);
  
  
  extern struct sk_buff *(*macvlan_handle_frame_hook)(struct sk_buff *);
  
  #endif /* _LINUX_IF_MACVLAN_H */
  