include/linux/if_bridge.h

   1 /*
   2  *      Linux ethernet bridge
   3  *
   4  *      Authors:
   5  *      Lennert Buytenhek               <buytenh@gnu.org>
   6  *
   7  *      This program is free software; you can redistribute it and/or
   8  *      modify it under the terms of the GNU General Public License
   9  *      as published by the Free Software Foundation; either version
  10  *      2 of the License, or (at your option) any later version.
  11  */
  12 #ifndef _LINUX_IF_BRIDGE_H
  13 #define _LINUX_IF_BRIDGE_H
  14
  15
  16 #include <linux/netdevice.h>
  17 #include <uapi/linux/if_bridge.h>
  18 #include <linux/bitops.h>
  19
  20 struct br_ip {
  21         union {
  22                 __be32  ip4;
  23 #if IS_ENABLED(CONFIG_IPV6)
  24                 struct in6_addr ip6;
  25 #endif
  26         } u;
  27         __be16          proto;
  28         __u16           vid;
  29 };
  30
  31 struct br_ip_list {
  32         struct list_head list;
  33         struct br_ip addr;
  34 };
  35
  36 #define BR_HAIRPIN_MODE         BIT(0)
  37 #define BR_BPDU_GUARD           BIT(1)
  38 #define BR_ROOT_BLOCK           BIT(2)
  39 #define BR_MULTICAST_FAST_LEAVE BIT(3)
  40 #define BR_ADMIN_COST           BIT(4)
  41 #define BR_LEARNING             BIT(5)
  42 #define BR_FLOOD                BIT(6)
  43 #define BR_AUTO_MASK            (BR_FLOOD | BR_LEARNING)
  44 #define BR_PROMISC              BIT(7)
  45 #define BR_PROXYARP             BIT(8)
  46 #define BR_LEARNING_SYNC        BIT(9)
  47 #define BR_PROXYARP_WIFI        BIT(10)
  48 #define BR_MCAST_FLOOD          BIT(11)
  49 #define BR_MULTICAST_TO_UNICAST BIT(12)
  50 #define BR_VLAN_TUNNEL          BIT(13)
  51 #define BR_BCAST_FLOOD          BIT(14)
  52 #define BR_NEIGH_SUPPRESS       BIT(15)
  53 #define BR_ISOLATED             BIT(16)
  54
  55 #define BR_DEFAULT_AGEING_TIME  (300 * HZ)
  56
  57 extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *));
  58
  59 typedef int br_should_route_hook_t(struct sk_buff *skb);
  60 extern br_should_route_hook_t __rcu *br_should_route_hook;
  61
  62 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING)
  63 int br_multicast_list_adjacent(struct net_device *dev,
  64                                struct list_head *br_ip_list);
  65 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto);
  66 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto);
  67 bool br_multicast_enabled(const struct net_device *dev);
  68 bool br_multicast_router(const struct net_device *dev);
  69 #else
  70 static inline int br_multicast_list_adjacent(struct net_device *dev,
  71                                              struct list_head *br_ip_list)
  72 {
  73         return 0;
  74 }
  75 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev,
  76                                                      int proto)
  77 {
  78         return false;
  79 }
  80 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev,
  81                                                      int proto)
  82 {
  83         return false;
  84 }
  85 static inline bool br_multicast_enabled(const struct net_device *dev)
  86 {
  87         return false;
  88 }
  89 static inline bool br_multicast_router(const struct net_device *dev)
  90 {
  91         return false;
  92 }
  93 #endif
  94
  95 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING)
  96 bool br_vlan_enabled(const struct net_device *dev);
  97 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid);
  98 int br_vlan_get_info(const struct net_device *dev, u16 vid,
  99                      struct bridge_vlan_info *p_vinfo);
 100 #else
 101 static inline bool br_vlan_enabled(const struct net_device *dev)
 102 {
 103         return false;
 104 }
 105
 106 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid)
 107 {
 108         return -EINVAL;
 109 }
 110
 111 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid,
 112                                    struct bridge_vlan_info *p_vinfo)
 113 {
 114         return -EINVAL;
 115 }
 116 #endif
 117
 118 #if IS_ENABLED(CONFIG_BRIDGE)
 119 struct net_device *br_fdb_find_port(const struct net_device *br_dev,
 120                                     const unsigned char *addr,
 121                                     __u16 vid);
 122 #else
 123 static inline struct net_device *
 124 br_fdb_find_port(const struct net_device *br_dev,
 125                  const unsigned char *addr,
 126                  __u16 vid)
 127 {
 128         return NULL;
 129 }
 130 #endif
 131
 132 #endif