Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
if_macvlan.h
Go to the documentation of this file.
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;
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 
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  u16 flags;
64  int (*receive)(struct sk_buff *skb);
65  int (*forward)(struct net_device *dev, struct sk_buff *skb);
66  struct macvtap_queue *taps[MAX_MACVTAP_QUEUES];
67  int numvtaps;
68  int minor;
69 };
70 
71 static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
72  unsigned int len, bool success,
73  bool multicast)
74 {
75  if (likely(success)) {
76  struct macvlan_pcpu_stats *pcpu_stats;
77 
78  pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
79  u64_stats_update_begin(&pcpu_stats->syncp);
80  pcpu_stats->rx_packets++;
81  pcpu_stats->rx_bytes += len;
82  if (multicast)
83  pcpu_stats->rx_multicast++;
84  u64_stats_update_end(&pcpu_stats->syncp);
85  } else {
86  this_cpu_inc(vlan->pcpu_stats->rx_errors);
87  }
88 }
89 
90 extern void macvlan_common_setup(struct net_device *dev);
91 
92 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
93  struct nlattr *tb[], struct nlattr *data[],
94  int (*receive)(struct sk_buff *skb),
95  int (*forward)(struct net_device *dev,
96  struct sk_buff *skb));
97 
98 extern void macvlan_count_rx(const struct macvlan_dev *vlan,
99  unsigned int len, bool success,
100  bool multicast);
101 
102 extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
103 
104 extern int macvlan_link_register(struct rtnl_link_ops *ops);
105 
106 extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
107  struct net_device *dev);
108 
109 #endif /* _LINUX_IF_MACVLAN_H */
Generated on Thu Jan 10 2013 14:51:34 for Linux Kernel by   doxygen 1.8.2