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)
12 struct socket *macvtap_get_socket(struct file *);
13 #else
14 #include <linux/err.h>
15 #include <linux/errno.h>
16 struct file;
17 struct socket;
macvtap_get_socket(struct file * f)18 static inline struct socket *macvtap_get_socket(struct file *f)
19 {
20 return ERR_PTR(-EINVAL);
21 }
22 #endif /* CONFIG_MACVTAP */
23
24 struct macvlan_port;
25 struct 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 */
38 struct 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
55 struct 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
macvlan_count_rx(const struct macvlan_dev * vlan,unsigned int len,bool success,bool multicast)70 static 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
89 extern void macvlan_common_setup(struct net_device *dev);
90
91 extern 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
97 extern void macvlan_count_rx(const struct macvlan_dev *vlan,
98 unsigned int len, bool success,
99 bool multicast);
100
101 extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
102
103 extern int macvlan_link_register(struct rtnl_link_ops *ops);
104
105 extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
106 struct net_device *dev);
107
108 #endif /* _LINUX_IF_MACVLAN_H */
109