if_macvlan.h revision e09eff7fc1c6f011f7bdb304e10d2ceef08c88ab 
1#ifndef _LINUX_IF_MACVLAN_H
2#define _LINUX_IF_MACVLAN_H
3
4#include <linux/if_link.h>
5#include <linux/list.h>
6#include <linux/netdevice.h>
7#include <linux/netlink.h>
8#include <net/netlink.h>
9#include <linux/u64_stats_sync.h>
10
11#if defined(CONFIG_MACVTAP) || defined(CONFIG_MACVTAP_MODULE)
12struct socket *macvtap_get_socket(struct file *);
13#else
14#include <linux/err.h>
15#include <linux/errno.h>
16struct file;
17struct socket;
18static inline struct socket *macvtap_get_socket(struct file *f)
19{
20	return ERR_PTR(-EINVAL);
21}
22#endif /* CONFIG_MACVTAP */
23
24struct macvlan_port;
25struct macvtap_queue;
26
27/**
28 *	struct macvlan_pcpu_stats - MACVLAN percpu stats
29 *	@rx_packets: number of received packets
30 *	@rx_bytes: number of received bytes
31 *	@rx_multicast: number of received multicast packets
32 *	@tx_packets: number of transmitted packets
33 *	@tx_bytes: number of transmitted bytes
34 *	@syncp: synchronization point for 64bit counters
35 *	@rx_errors: number of rx errors
36 *	@tx_dropped: number of tx dropped packets
37 */
38struct macvlan_pcpu_stats {
39	u64			rx_packets;
40	u64			rx_bytes;
41	u64			rx_multicast;
42	u64			tx_packets;
43	u64			tx_bytes;
44	struct u64_stats_sync	syncp;
45	u32			rx_errors;
46	u32			tx_dropped;
47};
48
49/*
50 * Maximum times a macvtap device can be opened. This can be used to
51 * configure the number of receive queue, e.g. for multiqueue virtio.
52 */
53#define MAX_MACVTAP_QUEUES	(NR_CPUS < 16 ? NR_CPUS : 16)
54
55struct macvlan_dev {
56	struct net_device	*dev;
57	struct list_head	list;
58	struct hlist_node	hlist;
59	struct macvlan_port	*port;
60	struct net_device	*lowerdev;
61	struct macvlan_pcpu_stats __percpu *pcpu_stats;
62	enum macvlan_mode	mode;
63	int (*receive)(struct sk_buff *skb);
64	int (*forward)(struct net_device *dev, struct sk_buff *skb);
65	struct macvtap_queue	*taps[MAX_MACVTAP_QUEUES];
66	int			numvtaps;
67	int			minor;
68};
69
70static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
71				    unsigned int len, bool success,
72				    bool multicast)
73{
74	if (likely(success)) {
75		struct macvlan_pcpu_stats *pcpu_stats;
76
77		pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
78		u64_stats_update_begin(&pcpu_stats->syncp);
79		pcpu_stats->rx_packets++;
80		pcpu_stats->rx_bytes += len;
81		if (multicast)
82			pcpu_stats->rx_multicast++;
83		u64_stats_update_end(&pcpu_stats->syncp);
84	} else {
85		this_cpu_inc(vlan->pcpu_stats->rx_errors);
86	}
87}
88
89extern void macvlan_common_setup(struct net_device *dev);
90
91extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
92				  struct nlattr *tb[], struct nlattr *data[],
93				  int (*receive)(struct sk_buff *skb),
94				  int (*forward)(struct net_device *dev,
95						 struct sk_buff *skb));
96
97extern void macvlan_count_rx(const struct macvlan_dev *vlan,
98			     unsigned int len, bool success,
99			     bool multicast);
100
101extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
102
103extern int macvlan_link_register(struct rtnl_link_ops *ops);
104
105extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
106				      struct net_device *dev);
107
108#endif /* _LINUX_IF_MACVLAN_H */
109