Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm...
[linux-2.6.git] / include / linux / if_macvlan.h
blob84ba5ac39e039f80da563305155800cd1332782c
1 #ifndef _LINUX_IF_MACVLAN_H
2 #define _LINUX_IF_MACVLAN_H
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>
11 #if IS_ENABLED(CONFIG_MACVTAP)
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)
20 return ERR_PTR(-EINVAL);
22 #endif /* CONFIG_MACVTAP */
24 struct macvlan_port;
25 struct macvtap_queue;
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
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;
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.
53 #define MAX_MACVTAP_QUEUES 16
55 #define MACVLAN_MC_FILTER_BITS 8
56 #define MACVLAN_MC_FILTER_SZ (1 << MACVLAN_MC_FILTER_BITS)
58 struct macvlan_dev {
59 struct net_device *dev;
60 struct list_head list;
61 struct hlist_node hlist;
62 struct macvlan_port *port;
63 struct net_device *lowerdev;
64 void *fwd_priv;
65 struct macvlan_pcpu_stats __percpu *pcpu_stats;
67 DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
69 netdev_features_t set_features;
70 enum macvlan_mode mode;
71 u16 flags;
72 int (*receive)(struct sk_buff *skb);
73 int (*forward)(struct net_device *dev, struct sk_buff *skb);
74 /* This array tracks active taps. */
75 struct macvtap_queue __rcu *taps[MAX_MACVTAP_QUEUES];
76 /* This list tracks all taps (both enabled and disabled) */
77 struct list_head queue_list;
78 int numvtaps;
79 int numqueues;
80 netdev_features_t tap_features;
81 int minor;
84 static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
85 unsigned int len, bool success,
86 bool multicast)
88 if (likely(success)) {
89 struct macvlan_pcpu_stats *pcpu_stats;
91 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
92 u64_stats_update_begin(&pcpu_stats->syncp);
93 pcpu_stats->rx_packets++;
94 pcpu_stats->rx_bytes += len;
95 if (multicast)
96 pcpu_stats->rx_multicast++;
97 u64_stats_update_end(&pcpu_stats->syncp);
98 } else {
99 this_cpu_inc(vlan->pcpu_stats->rx_errors);
103 extern void macvlan_common_setup(struct net_device *dev);
105 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
106 struct nlattr *tb[], struct nlattr *data[],
107 int (*receive)(struct sk_buff *skb),
108 int (*forward)(struct net_device *dev,
109 struct sk_buff *skb));
111 extern void macvlan_count_rx(const struct macvlan_dev *vlan,
112 unsigned int len, bool success,
113 bool multicast);
115 extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
117 extern int macvlan_link_register(struct rtnl_link_ops *ops);
119 extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
120 struct net_device *dev);
122 #if IS_ENABLED(CONFIG_MACVLAN)
123 static inline struct net_device *
124 macvlan_dev_real_dev(const struct net_device *dev)
126 struct macvlan_dev *macvlan = netdev_priv(dev);
128 return macvlan->lowerdev;
130 #else
131 static inline struct net_device *
132 macvlan_dev_real_dev(const struct net_device *dev)
134 BUG();
135 return NULL;
137 #endif
139 #endif /* _LINUX_IF_MACVLAN_H */