#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>

  #include <linux/u64_stats_sync.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_pcpu_stats - MACVLAN percpu stats

   *	@rx_packets: number of received packets
   *	@rx_bytes: number of received bytes

   *	@rx_multicast: number of received multicast packets

   *	@tx_packets: number of transmitted packets
   *	@tx_bytes: number of transmitted bytes

   *	@syncp: synchronization point for 64bit counters

   *	@rx_errors: number of rx errors
   *	@tx_dropped: number of tx dropped packets

   */

  struct macvlan_pcpu_stats {

  	u64			rx_packets;
  	u64			rx_bytes;
  	u64			rx_multicast;

  	u64			tx_packets;
  	u64			tx_bytes;

  	struct u64_stats_sync	syncp;

  	u32			rx_errors;
  	u32			tx_dropped;

  };

  /*
   * Maximum times a macvtap device can be opened. This can be used to
   * configure the number of receive queue, e.g. for multiqueue virtio.
   */
  #define MAX_MACVTAP_QUEUES	(NR_CPUS < 16 ? NR_CPUS : 16)

  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_pcpu_stats __percpu *pcpu_stats;

  	enum macvlan_mode	mode;
  	int (*receive)(struct sk_buff *skb);
  	int (*forward)(struct net_device *dev, struct sk_buff *skb);

  	struct macvtap_queue	*taps[MAX_MACVTAP_QUEUES];
  	int			numvtaps;

  };
  
  static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
  				    unsigned int len, bool success,
  				    bool multicast)
  {

  	if (likely(success)) {

  		struct macvlan_pcpu_stats *pcpu_stats;
  
  		pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
  		u64_stats_update_begin(&pcpu_stats->syncp);
  		pcpu_stats->rx_packets++;
  		pcpu_stats->rx_bytes += len;

  		if (multicast)

  			pcpu_stats->rx_multicast++;
  		u64_stats_update_end(&pcpu_stats->syncp);

  	} else {

  		this_cpu_inc(vlan->pcpu_stats->rx_errors);

  	}
  }

  extern void macvlan_common_setup(struct net_device *dev);

  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);

  #endif /* _LINUX_IF_MACVLAN_H */