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/if_vlan.h>
   6 #include <linux/list.h>
   7 #include <linux/netdevice.h>
   8 #include <linux/netlink.h>
   9 #include <net/netlink.h>
  10 #include <linux/u64_stats_sync.h>
  11
  12 struct macvlan_port;
  13 struct macvtap_queue;
  14
  15 /*
  16  * Maximum times a macvtap device can be opened. This can be used to
  17  * configure the number of receive queue, e.g. for multiqueue virtio.
  18  */
  19 #define MAX_TAP_QUEUES  256
  20
  21 #define MACVLAN_MC_FILTER_BITS  8
  22 #define MACVLAN_MC_FILTER_SZ    (1 << MACVLAN_MC_FILTER_BITS)
  23
  24 struct macvlan_dev {
  25         struct net_device       *dev;
  26         struct list_head        list;
  27         struct hlist_node       hlist;
  28         struct macvlan_port     *port;
  29         struct net_device       *lowerdev;
  30         void                    *fwd_priv;
  31         struct vlan_pcpu_stats __percpu *pcpu_stats;
  32
  33         DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
  34
  35         netdev_features_t       set_features;
  36         enum macvlan_mode       mode;
  37         u16                     flags;
  38         /* This array tracks active taps. */
  39         struct tap_queue        __rcu *taps[MAX_TAP_QUEUES];
  40         /* This list tracks all taps (both enabled and disabled) */
  41         struct list_head        queue_list;
  42         int                     numvtaps;
  43         int                     numqueues;
  44         netdev_features_t       tap_features;
  45         int                     minor;
  46         int                     nest_level;
  47 #ifdef CONFIG_NET_POLL_CONTROLLER
  48         struct netpoll          *netpoll;
  49 #endif
  50         unsigned int            macaddr_count;
  51 };
  52
  53 static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
  54                                     unsigned int len, bool success,
  55                                     bool multicast)
  56 {
  57         if (likely(success)) {
  58                 struct vlan_pcpu_stats *pcpu_stats;
  59
  60                 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
  61                 u64_stats_update_begin(&pcpu_stats->syncp);
  62                 pcpu_stats->rx_packets++;
  63                 pcpu_stats->rx_bytes += len;
  64                 if (multicast)
  65                         pcpu_stats->rx_multicast++;
  66                 u64_stats_update_end(&pcpu_stats->syncp);
  67         } else {
  68                 this_cpu_inc(vlan->pcpu_stats->rx_errors);
  69         }
  70 }
  71
  72 extern void macvlan_common_setup(struct net_device *dev);
  73
  74 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
  75                                   struct nlattr *tb[], struct nlattr *data[]);
  76
  77 extern void macvlan_count_rx(const struct macvlan_dev *vlan,
  78                              unsigned int len, bool success,
  79                              bool multicast);
  80
  81 extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
  82
  83 extern int macvlan_link_register(struct rtnl_link_ops *ops);
  84
  85 #if IS_ENABLED(CONFIG_MACVLAN)
  86 static inline struct net_device *
  87 macvlan_dev_real_dev(const struct net_device *dev)
  88 {
  89         struct macvlan_dev *macvlan = netdev_priv(dev);
  90
  91         return macvlan->lowerdev;
  92 }
  93 #else
  94 static inline struct net_device *
  95 macvlan_dev_real_dev(const struct net_device *dev)
  96 {
  97         BUG();
  98         return NULL;
  99 }
 100 #endif
 101
 102 #endif /* _LINUX_IF_MACVLAN_H */