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         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
  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 */