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 #define BR_PORT_MAB BIT(22) 63 64 #define BR_DEFAULT_AGEING_TIME (300 * HZ) 65 66 struct net_bridge; 67 void brioctl_set(int (*hook)(struct net *net, struct net_bridge *br, 68 unsigned int cmd, struct ifreq *ifr, 69 void __user *uarg)); 70 int br_ioctl_call(struct net *net, struct net_bridge *br, unsigned int cmd, 71 struct ifreq *ifr, void __user *uarg); 72 73 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) 74 int br_multicast_list_adjacent(struct net_device *dev, 75 struct list_head *br_ip_list); 76 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto); 77 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto); 78 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto); 79 bool br_multicast_enabled(const struct net_device *dev); 80 bool br_multicast_router(const struct net_device *dev); 81 #else 82 static inline int br_multicast_list_adjacent(struct net_device *dev, 83 struct list_head *br_ip_list) 84 { 85 return 0; 86 } 87 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev, 88 int proto) 89 { 90 return false; 91 } 92 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev, 93 int proto) 94 { 95 return false; 96 } 97 98 static inline bool br_multicast_has_router_adjacent(struct net_device *dev, 99 int proto) 100 { 101 return true; 102 } 103 104 static inline bool br_multicast_enabled(const struct net_device *dev) 105 { 106 return false; 107 } 108 static inline bool br_multicast_router(const struct net_device *dev) 109 { 110 return false; 111 } 112 #endif 113 114 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING) 115 bool br_vlan_enabled(const struct net_device *dev); 116 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid); 117 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid); 118 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto); 119 int br_vlan_get_info(const struct net_device *dev, u16 vid, 120 struct bridge_vlan_info *p_vinfo); 121 int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid, 122 struct bridge_vlan_info *p_vinfo); 123 bool br_mst_enabled(const struct net_device *dev); 124 int br_mst_get_info(const struct net_device *dev, u16 msti, unsigned long *vids); 125 int br_mst_get_state(const struct net_device *dev, u16 msti, u8 *state); 126 #else 127 static inline bool br_vlan_enabled(const struct net_device *dev) 128 { 129 return false; 130 } 131 132 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 133 { 134 return -EINVAL; 135 } 136 137 static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 138 { 139 return -EINVAL; 140 } 141 142 static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 143 { 144 return -EINVAL; 145 } 146 147 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid, 148 struct bridge_vlan_info *p_vinfo) 149 { 150 return -EINVAL; 151 } 152 153 static inline int br_vlan_get_info_rcu(const struct net_device *dev, u16 vid, 154 struct bridge_vlan_info *p_vinfo) 155 { 156 return -EINVAL; 157 } 158 159 static inline bool br_mst_enabled(const struct net_device *dev) 160 { 161 return false; 162 } 163 164 static inline int br_mst_get_info(const struct net_device *dev, u16 msti, 165 unsigned long *vids) 166 { 167 return -EINVAL; 168 } 169 static inline int br_mst_get_state(const struct net_device *dev, u16 msti, 170 u8 *state) 171 { 172 return -EINVAL; 173 } 174 #endif 175 176 #if IS_ENABLED(CONFIG_BRIDGE) 177 struct net_device *br_fdb_find_port(const struct net_device *br_dev, 178 const unsigned char *addr, 179 __u16 vid); 180 void br_fdb_clear_offload(const struct net_device *dev, u16 vid); 181 bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag); 182 u8 br_port_get_stp_state(const struct net_device *dev); 183 clock_t br_get_ageing_time(const struct net_device *br_dev); 184 #else 185 static inline struct net_device * 186 br_fdb_find_port(const struct net_device *br_dev, 187 const unsigned char *addr, 188 __u16 vid) 189 { 190 return NULL; 191 } 192 193 static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid) 194 { 195 } 196 197 static inline bool 198 br_port_flag_is_set(const struct net_device *dev, unsigned long flag) 199 { 200 return false; 201 } 202 203 static inline u8 br_port_get_stp_state(const struct net_device *dev) 204 { 205 return BR_STATE_DISABLED; 206 } 207 208 static inline clock_t br_get_ageing_time(const struct net_device *br_dev) 209 { 210 return 0; 211 } 212 #endif 213 214 #endif 215