1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <buytenh@gnu.org> 7 */ 8 #ifndef _LINUX_IF_BRIDGE_H 9 #define _LINUX_IF_BRIDGE_H 10 11 12 #include <linux/netdevice.h> 13 #include <uapi/linux/if_bridge.h> 14 #include <linux/bitops.h> 15 16 struct br_ip { 17 union { 18 __be32 ip4; 19 #if IS_ENABLED(CONFIG_IPV6) 20 struct in6_addr ip6; 21 #endif 22 } src; 23 union { 24 __be32 ip4; 25 #if IS_ENABLED(CONFIG_IPV6) 26 struct in6_addr ip6; 27 #endif 28 unsigned char mac_addr[ETH_ALEN]; 29 } dst; 30 __be16 proto; 31 __u16 vid; 32 }; 33 34 struct br_ip_list { 35 struct list_head list; 36 struct br_ip addr; 37 }; 38 39 #define BR_HAIRPIN_MODE BIT(0) 40 #define BR_BPDU_GUARD BIT(1) 41 #define BR_ROOT_BLOCK BIT(2) 42 #define BR_MULTICAST_FAST_LEAVE BIT(3) 43 #define BR_ADMIN_COST BIT(4) 44 #define BR_LEARNING BIT(5) 45 #define BR_FLOOD BIT(6) 46 #define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING) 47 #define BR_PROMISC BIT(7) 48 #define BR_PROXYARP BIT(8) 49 #define BR_LEARNING_SYNC BIT(9) 50 #define BR_PROXYARP_WIFI BIT(10) 51 #define BR_MCAST_FLOOD BIT(11) 52 #define BR_MULTICAST_TO_UNICAST BIT(12) 53 #define BR_VLAN_TUNNEL BIT(13) 54 #define BR_BCAST_FLOOD BIT(14) 55 #define BR_NEIGH_SUPPRESS BIT(15) 56 #define BR_ISOLATED BIT(16) 57 #define BR_MRP_AWARE BIT(17) 58 #define BR_MRP_LOST_CONT BIT(18) 59 #define BR_MRP_LOST_IN_CONT BIT(19) 60 #define BR_TX_FWD_OFFLOAD BIT(20) 61 #define BR_PORT_LOCKED BIT(21) 62 63 #define BR_DEFAULT_AGEING_TIME (300 * HZ) 64 65 struct net_bridge; 66 void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br, 67 unsigned int cmd, struct ifreq *ifr, 68 void __user *uarg)); 69 int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd, 70 struct ifreq *ifr, void __user *uarg); 71 72 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) 73 int br_multicast_list_adjacent(struct net_device *dev, 74 struct list_head *br_ip_list); 75 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto); 76 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto); 77 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto); 78 bool br_multicast_enabled(const struct net_device *dev); 79 bool br_multicast_router(const struct net_device *dev); 80 #else 81 static inline int br_multicast_list_adjacent(struct net_device *dev, 82 struct list_head *br_ip_list) 83 { 84 return 0; 85 } 86 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev, 87 int proto) 88 { 89 return false; 90 } 91 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev, 92 int proto) 93 { 94 return false; 95 } 96 97 static inline bool br_multicast_has_router_adjacent(struct net_device *dev, 98 int proto) 99 { 100 return true; 101 } 102 103 static inline bool br_multicast_enabled(const struct net_device *dev) 104 { 105 return false; 106 } 107 static inline bool br_multicast_router(const struct net_device *dev) 108 { 109 return false; 110 } 111 #endif 112 113 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING) 114 bool br_vlan_enabled(const struct net_device *dev); 115 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid); 116 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid); 117 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto); 118 int br_vlan_get_info(const struct net_device *dev, u16 vid, 119 struct bridge_vlan_info *p_vinfo); 120 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid, 121 struct bridge_vlan_info *p_vinfo); 122 bool br_mst_enabled(const struct net_device *dev); 123 int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids); 124 int br_mst_get_state(const struct net_device *dev, u16 msti, u8 *state); 125 #else 126 static inline bool br_vlan_enabled(const struct net_device *dev) 127 { 128 return false; 129 } 130 131 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 132 { 133 return -EINVAL; 134 } 135 136 static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 137 { 138 return -EINVAL; 139 } 140 141 static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 142 { 143 return -EINVAL; 144 } 145 146 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid, 147 struct bridge_vlan_info *p_vinfo) 148 { 149 return -EINVAL; 150 } 151 152 static inline int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid, 153 struct bridge_vlan_info *p_vinfo) 154 { 155 return -EINVAL; 156 } 157 158 static inline bool br_mst_enabled(const struct net_device *dev) 159 { 160 return false; 161 } 162 163 static inline int br_mst_get_info(const struct net_device *dev, u16 msti, 164 unsigned long *vids) 165 { 166 return -EINVAL; 167 } 168 static inline int br_mst_get_state(const struct net_device *dev, u16 msti, 169 u8 *state) 170 { 171 return -EINVAL; 172 } 173 #endif 174 175 #if IS_ENABLED(CONFIG_BRIDGE) 176 struct net_device *br_fdb_find_port(const struct net_device *br_dev, 177 const unsigned char *addr, 178 __u16 vid); 179 void br_fdb_clear_offload(const struct net_device *dev, u16 vid); 180 bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag); 181 u8 br_port_get_stp_state(const struct net_device *dev); 182 clock_t br_get_ageing_time(const struct net_device *br_dev); 183 #else 184 static inline struct net_device * 185 br_fdb_find_port(const struct net_device *br_dev, 186 const unsigned char *addr, 187 __u16 vid) 188 { 189 return NULL; 190 } 191 192 static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid) 193 { 194 } 195 196 static inline bool 197 br_port_flag_is_set(const struct net_device *dev, unsigned long flag) 198 { 199 return false; 200 } 201 202 static inline u8 br_port_get_stp_state(const struct net_device *dev) 203 { 204 return BR_STATE_DISABLED; 205 } 206 207 static inline clock_t br_get_ageing_time(const struct net_device *br_dev) 208 { 209 return 0; 210 } 211 #endif 212 213 #endif 214