Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso...
[platform/adaptation/renesas_rcar/renesas_kernel.git] / include / linux / if_macvlan.h
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
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         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 */