LXR linux/include/linux/if

   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        struct macvlan_pcpu_stats __percpu *pcpu_stats;
  65
  66        DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
  67
  68        netdev_features_t       set_features;
  69        enum macvlan_mode       mode;
  70        u16                     flags;
  71        int (*receive)(struct sk_buff *skb);
  72        int (*forward)(struct net_device *dev, struct sk_buff *skb);
  73        /* This array tracks active taps. */
  74        struct macvtap_queue    __rcu *taps[MAX_MACVTAP_QUEUES];
  75        /* This list tracks all taps (both enabled and disabled) */
  76        struct list_head        queue_list;
  77        int                     numvtaps;
  78        int                     numqueues;
  79        netdev_features_t       tap_features;
  80        int                     minor;
  81};
  82
  83static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
  84                                    unsigned int len, bool success,
  85                                    bool multicast)
  86{
  87        if (likely(success)) {
  88                struct macvlan_pcpu_stats *pcpu_stats;
  89
  90                pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
  91                u64_stats_update_begin(&pcpu_stats->syncp);
  92                pcpu_stats->rx_packets++;
  93                pcpu_stats->rx_bytes += len;
  94                if (multicast)
  95                        pcpu_stats->rx_multicast++;
  96                u64_stats_update_end(&pcpu_stats->syncp);
  97        } else {
  98                this_cpu_inc(vlan->pcpu_stats->rx_errors);
  99        }
 100}
 101
 102extern void macvlan_common_setup(struct net_device *dev);
 103
 104extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
 105                                  struct nlattr *tb[], struct nlattr *data[],
 106                                  int (*receive)(struct sk_buff *skb),
 107                                  int (*forward)(struct net_device *dev,
 108                                                 struct sk_buff *skb));
 109
 110extern void macvlan_count_rx(const struct macvlan_dev *vlan,
 111                             unsigned int len, bool success,
 112                             bool multicast);
 113
 114extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
 115
 116extern int macvlan_link_register(struct rtnl_link_ops *ops);
 117
 118extern netdev_tx_t macvlan_start_xmit(struct sk_buff *skb,
 119                                      struct net_device *dev);
 120
 121#endif /* _LINUX_IF_MACVLAN_H */
 122