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 #if IS_ENABLED(CONFIG_MACVTAP)
  13 struct socket *macvtap_get_socket(struct file *);
  14 #else
  15 #include <linux/err.h>
  16 #include <linux/errno.h>
  17 struct file;
  18 struct socket;
  19 static inline struct socket *macvtap_get_socket(struct file *f)
  20 {
  21         return ERR_PTR(-EINVAL);
  22 }
  23 #endif /* CONFIG_MACVTAP */
  24
  25 struct macvlan_port;
  26 struct macvtap_queue;
  27
  28 /*
  29  * Maximum times a macvtap device can be opened. This can be used to
  30  * configure the number of receive queue, e.g. for multiqueue virtio.
  31  */
  32 #define MAX_MACVTAP_QUEUES      16
  33
  34 #define MACVLAN_MC_FILTER_BITS  8
  35 #define MACVLAN_MC_FILTER_SZ    (1 << MACVLAN_MC_FILTER_BITS)
  36
  37 struct macvlan_dev {
  38         struct net_device       *dev;
  39         struct list_head        list;
  40         struct hlist_node       hlist;
  41         struct macvlan_port     *port;
  42         struct net_device       *lowerdev;
  43         void                    *fwd_priv;
  44         struct vlan_pcpu_stats __percpu *pcpu_stats;
  45
  46         DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
  47
  48         netdev_features_t       set_features;
  49         enum macvlan_mode       mode;
  50         u16                     flags;
  51         /* This array tracks active taps. */
  52         struct macvtap_queue    __rcu *taps[MAX_MACVTAP_QUEUES];
  53         /* This list tracks all taps (both enabled and disabled) */
  54         struct list_head        queue_list;
  55         int                     numvtaps;
  56         int                     numqueues;
  57         netdev_features_t       tap_features;
  58         int                     minor;
  59         int                     nest_level;
  60 };
  61
  62 static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
  63                                     unsigned int len, bool success,
  64                                     bool multicast)
  65 {
  66         if (likely(success)) {
  67                 struct vlan_pcpu_stats *pcpu_stats;
  68
  69                 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
  70                 u64_stats_update_begin(&pcpu_stats->syncp);
  71                 pcpu_stats->rx_packets++;
  72                 pcpu_stats->rx_bytes += len;
  73                 if (multicast)
  74                         pcpu_stats->rx_multicast++;
  75                 u64_stats_update_end(&pcpu_stats->syncp);
  76         } else {
  77                 this_cpu_inc(vlan->pcpu_stats->rx_errors);
  78         }
  79 }
  80
  81 extern void macvlan_common_setup(struct net_device *dev);
  82
  83 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
  84                                   struct nlattr *tb[], struct nlattr *data[]);
  85
  86 extern void macvlan_count_rx(const struct macvlan_dev *vlan,
  87                              unsigned int len, bool success,
  88                              bool multicast);
  89
  90 extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
  91
  92 extern int macvlan_link_register(struct rtnl_link_ops *ops);
  93
  94 #if IS_ENABLED(CONFIG_MACVLAN)
  95 static inline struct net_device *
  96 macvlan_dev_real_dev(const struct net_device *dev)
  97 {
  98         struct macvlan_dev *macvlan = netdev_priv(dev);
  99
 100         return macvlan->lowerdev;
 101 }
 102 #else
 103 static inline struct net_device *
 104 macvlan_dev_real_dev(const struct net_device *dev)
 105 {
 106         BUG();
 107         return NULL;
 108 }
 109 #endif
 110
 111 #endif /* _LINUX_IF_MACVLAN_H */