include/linux/if_macvlan.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_IF_MACVLAN_H
   3 #define _LINUX_IF_MACVLAN_H
   4
   5 #include <linux/if_link.h>
   6 #include <linux/if_vlan.h>
   7 #include <linux/list.h>
   8 #include <linux/netdevice.h>
   9 #include <linux/netlink.h>
  10 #include <net/netlink.h>
  11 #include <linux/u64_stats_sync.h>
  12
  13 struct macvlan_port;
  14 struct macvtap_queue;
  15
  16 /*
  17  * Maximum times a macvtap device can be opened. This can be used to
  18  * configure the number of receive queue, e.g. for multiqueue virtio.
  19  */
  20 #define MAX_TAP_QUEUES  256
  21
  22 #define MACVLAN_MC_FILTER_BITS  8
  23 #define MACVLAN_MC_FILTER_SZ    (1 << MACVLAN_MC_FILTER_BITS)
  24
  25 struct macvlan_dev {
  26         struct net_device       *dev;
  27         struct list_head        list;
  28         struct hlist_node       hlist;
  29         struct macvlan_port     *port;
  30         struct net_device       *lowerdev;
  31         void                    *fwd_priv;
  32         struct vlan_pcpu_stats __percpu *pcpu_stats;
  33
  34         DECLARE_BITMAP(mc_filter, MACVLAN_MC_FILTER_SZ);
  35
  36         netdev_features_t       set_features;
  37         enum macvlan_mode       mode;
  38         u16                     flags;
  39         /* This array tracks active taps. */
  40         struct tap_queue        __rcu *taps[MAX_TAP_QUEUES];
  41         /* This list tracks all taps (both enabled and disabled) */
  42         struct list_head        queue_list;
  43         int                     numvtaps;
  44         int                     numqueues;
  45         netdev_features_t       tap_features;
  46         int                     minor;
  47         int                     nest_level;
  48 #ifdef CONFIG_NET_POLL_CONTROLLER
  49         struct netpoll          *netpoll;
  50 #endif
  51         unsigned int            macaddr_count;
  52 };
  53
  54 static inline void macvlan_count_rx(const struct macvlan_dev *vlan,
  55                                     unsigned int len, bool success,
  56                                     bool multicast)
  57 {
  58         if (likely(success)) {
  59                 struct vlan_pcpu_stats *pcpu_stats;
  60
  61                 pcpu_stats = this_cpu_ptr(vlan->pcpu_stats);
  62                 u64_stats_update_begin(&pcpu_stats->syncp);
  63                 pcpu_stats->rx_packets++;
  64                 pcpu_stats->rx_bytes += len;
  65                 if (multicast)
  66                         pcpu_stats->rx_multicast++;
  67                 u64_stats_update_end(&pcpu_stats->syncp);
  68         } else {
  69                 this_cpu_inc(vlan->pcpu_stats->rx_errors);
  70         }
  71 }
  72
  73 extern void macvlan_common_setup(struct net_device *dev);
  74
  75 extern int macvlan_common_newlink(struct net *src_net, struct net_device *dev,
  76                                   struct nlattr *tb[], struct nlattr *data[]);
  77
  78 extern void macvlan_count_rx(const struct macvlan_dev *vlan,
  79                              unsigned int len, bool success,
  80                              bool multicast);
  81
  82 extern void macvlan_dellink(struct net_device *dev, struct list_head *head);
  83
  84 extern int macvlan_link_register(struct rtnl_link_ops *ops);
  85
  86 #if IS_ENABLED(CONFIG_MACVLAN)
  87 static inline struct net_device *
  88 macvlan_dev_real_dev(const struct net_device *dev)
  89 {
  90         struct macvlan_dev *macvlan = netdev_priv(dev);
  91
  92         return macvlan->lowerdev;
  93 }
  94 #else
  95 static inline struct net_device *
  96 macvlan_dev_real_dev(const struct net_device *dev)
  97 {
  98         BUG();
  99         return NULL;
 100 }
 101 #endif
 102
 103 #endif /* _LINUX_IF_MACVLAN_H */