1#ifndef _LINUX_IF_MACVLAN_H
2#define _LINUX_IF_MACVLAN_H
3
4#include <linux/if_link.h>
5#include <linux/if_vlan.h>
6#include <linux/list.h>
7#include <linux/netdevice.h>
8#include <linux/netlink.h>
9#include <net/netlink.h>
10#include <linux/u64_stats_sync.h>
11
12#if IS_ENABLED(CONFIG_MACVTAP)
13struct socket *macvtap_get_socket(struct file *);
14#else
15#include <linux/err.h>
16#include <linux/errno.h>
17struct file;
18struct socket;
19static inline struct socket *macvtap_get_socket(struct file *f)
20{
21	return ERR_PTR(-EINVAL);
22}
23#endif /* CONFIG_MACVTAP */
24
25struct macvlan_port;
26struct macvtap_queue;
27
28/*
29 * Maximum times a macvtap device can be opened. This can be used to
30 * configure the number of receive queue, e.g. for multiqueue virtio.
31 */
32#define MAX_MACVTAP_QUEUES	256
33
34#define MACVLAN_MC_FILTER_BITS	8
35#define MACVLAN_MC_FILTER_SZ	(1 << MACVLAN_MC_FILTER_BITS)
36
37struct macvlan_dev {
38	struct net_device	*dev;
39	struct list_head	list;
40	struct hlist_node	hlist;
41	struct macvlan_port	*port;
42	struct net_device	*lowerdev;
43	void			*fwd_priv;
44	struct vlan_pcpu_stats __percpu *pcpu_stats;
45
46	DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
47
48	netdev_features_t	set_features;
49	enum macvlan_mode	mode;
50	u16			flags;
51	/* This array tracks active taps. */
52	struct macvtap_queue	__rcu *taps[MAX_MACVTAP_QUEUES];
53	/* This list tracks all taps (both enabled and disabled) */
54	struct list_head	queue_list;
55	int			numvtaps;
56	int			numqueues;
57	netdev_features_t	tap_features;
58	int			minor;
59	int			nest_level;
60#ifdef CONFIG_NET_POLL_CONTROLLER
61	struct netpoll		*netpoll;
62#endif
63	unsigned int		macaddr_count;
64};
65
66static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
67				    unsigned int len, bool success,
68				    bool multicast)
69{
70	if (likely(success)) {
71		struct vlan_pcpu_stats *pcpu_stats;
72
73		pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
74		u64_stats_update_begin(&pcpu_stats->syncp);
75		pcpu_stats->rx_packets++;
76		pcpu_stats->rx_bytes += len;
77		if (multicast)
78			pcpu_stats->rx_multicast++;
79		u64_stats_update_end(&pcpu_stats->syncp);
80	} else {
81		this_cpu_inc(vlan->pcpu_stats->rx_errors);
82	}
83}
84
85extern void macvlan_common_setup(struct net_device *dev);
86
87extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
88				  struct nlattr *tb[], struct nlattr *data[]);
89
90extern void macvlan_count_rx(const struct macvlan_dev *vlan,
91			     unsigned int len, bool success,
92			     bool multicast);
93
94extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
95
96extern int macvlan_link_register(struct rtnl_link_ops *ops);
97
98#if IS_ENABLED(CONFIG_MACVLAN)
99static inline struct net_device *
100macvlan_dev_real_dev(const struct net_device *dev)
101{
102	struct macvlan_dev *macvlan = netdev_priv(dev);
103
104	return macvlan->lowerdev;
105}
106#else
107static inline struct net_device *
108macvlan_dev_real_dev(const struct net_device *dev)
109{
110	BUG();
111	return NULL;
112}
113#endif
114
115#endif /* _LINUX_IF_MACVLAN_H */
116