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 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)
  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      16
  54
  55 #define MACVLAN_MC_FILTER_BITS  8
  56 #define MACVLAN_MC_FILTER_SZ    (1 << MACVLAN_MC_FILTER_BITS)
  57
  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         struct macvlan_pcpu_stats __percpu *pcpu_stats;
  65
  66         DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
  67
  68         enum macvlan_mode       mode;
  69         u16                     flags;
  70         int (*receive)(struct sk_buff *skb);
  71         int (*forward)(struct net_device *dev, struct sk_buff *skb);
  72         /* This array tracks active taps. */
  73         struct macvtap_queue    *taps[MAX_MACVTAP_QUEUES];
  74         /* This list tracks all taps (both enabled and disabled) */
  75         struct list_head        queue_list;
  76         int                     numvtaps;
  77         int                     numqueues;
  78         int                     minor;
  79 };
  80
  81 static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
  82                                     unsigned int len, bool success,
  83                                     bool multicast)
  84 {
  85         if (likely(success)) {
  86                 struct macvlan_pcpu_stats *pcpu_stats;
  87
  88                 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
  89                 u64_stats_update_begin(&pcpu_stats->syncp);
  90                 pcpu_stats->rx_packets++;
  91                 pcpu_stats->rx_bytes += len;
  92                 if (multicast)
  93                         pcpu_stats->rx_multicast++;
  94                 u64_stats_update_end(&pcpu_stats->syncp);
  95         } else {
  96                 this_cpu_inc(vlan->pcpu_stats->rx_errors);
  97         }
  98 }
  99
 100 extern void macvlan_common_setup(struct net_device *dev);
 101
 102 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
 103                                   struct nlattr *tb[], struct nlattr *data[],
 104                                   int (*receive)(struct sk_buff *skb),
 105                                   int (*forward)(struct net_device *dev,
 106                                                  struct sk_buff *skb));
 107
 108 extern void macvlan_count_rx(const struct macvlan_dev *vlan,
 109                              unsigned int len, bool success,
 110                              bool multicast);
 111
 112 extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
 113
 114 extern int macvlan_link_register(struct rtnl_link_ops *ops);
 115
 116 extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
 117                                       struct net_device *dev);
 118
 119 #endif /* _LINUX_IF_MACVLAN_H */