/* SPDX-License-Identifier: GPL-2.0 */

  #ifndef _LINUX_IF_MACVLAN_H
  #define _LINUX_IF_MACVLAN_H

  #include <linux/if_link.h>

  #include <linux/if_vlan.h>

  #include <linux/list.h>
  #include <linux/netdevice.h>
  #include <linux/netlink.h>
  #include <net/netlink.h>

  #include <linux/u64_stats_sync.h>

  
  struct macvlan_port;
  struct macvtap_queue;

  /*
   * 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_TAP_QUEUES	256

  #define MACVLAN_MC_FILTER_BITS	8
  #define MACVLAN_MC_FILTER_SZ	(1 << MACVLAN_MC_FILTER_BITS)

  struct macvlan_dev {
  	struct net_device	*dev;
  	struct list_head	list;
  	struct hlist_node	hlist;
  	struct macvlan_port	*port;
  	struct net_device	*lowerdev;

  	void			*fwd_priv;

  	struct vlan_pcpu_stats __percpu *pcpu_stats;

  
  	DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);

  	netdev_features_t	set_features;

  	enum macvlan_mode	mode;

  	u16			flags;

  	/* This array tracks active taps. */

  	struct tap_queue	__rcu *taps[MAX_TAP_QUEUES];

  	/* This list tracks all taps (both enabled and disabled) */
  	struct list_head	queue_list;

  	int			numvtaps;

  	int			numqueues;

  	netdev_features_t	tap_features;

  	int			minor;

  	int			nest_level;

  #ifdef CONFIG_NET_POLL_CONTROLLER
  	struct netpoll		*netpoll;
  #endif

  	unsigned int		macaddr_count;

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

  	if (likely(success)) {

  		struct vlan_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[]);

  
  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);

  #if IS_ENABLED(CONFIG_MACVLAN)
  static inline struct net_device *
  macvlan_dev_real_dev(const struct net_device *dev)
  {
  	struct macvlan_dev *macvlan = netdev_priv(dev);
  
  	return macvlan->lowerdev;
  }
  #else
  static inline struct net_device *
  macvlan_dev_real_dev(const struct net_device *dev)
  {
  	BUG();
  	return NULL;
  }
  #endif

  #endif /* _LINUX_IF_MACVLAN_H */