Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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 IS_ENABLED(CONFIG_MACVTAP)
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 16
54
55#define MACVLAN_MC_FILTER_BITS 8
56#define MACVLAN_MC_FILTER_SZ (1 << MACVLAN_MC_FILTER_BITS)
57
58struct 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;
66
67 DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
68
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;
82};
83
84static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
85 unsigned int len, bool success,
86 bool multicast)
87{
88 if (likely(success)) {
89 struct macvlan_pcpu_stats *pcpu_stats;
90
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);
100 }
101}
102
103extern void macvlan_common_setup(struct net_device *dev);
104
105extern 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));
110
111extern void macvlan_count_rx(const struct macvlan_dev *vlan,
112 unsigned int len, bool success,
113 bool multicast);
114
115extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
116
117extern int macvlan_link_register(struct rtnl_link_ops *ops);
118
119extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
120 struct net_device *dev);
121
122#if IS_ENABLED(CONFIG_MACVLAN)
123static inline struct net_device *
124macvlan_dev_real_dev(const struct net_device *dev)
125{
126 struct macvlan_dev *macvlan = netdev_priv(dev);
127
128 return macvlan->lowerdev;
129}
130#else
131static inline struct net_device *
132macvlan_dev_real_dev(const struct net_device *dev)
133{
134 BUG();
135 return NULL;
136}
137#endif
138
139#endif /* _LINUX_IF_MACVLAN_H */