1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Linux ethernet bridge 4 * 5 * Authors: 6 * Lennert Buytenhek <[email protected]> 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 61 #define BR_DEFAULT_AGEING_TIME (300 * HZ) 62 63 extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *)); 64 65 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) 66 int br_multicast_list_adjacent(struct net_device *dev, 67 struct list_head *br_ip_list); 68 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto); 69 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto); 70 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto); 71 bool br_multicast_enabled(const struct net_device *dev); 72 bool br_multicast_router(const struct net_device *dev); 73 #else 74 static inline int br_multicast_list_adjacent(struct net_device *dev, 75 struct list_head *br_ip_list) 76 { 77 return 0; 78 } 79 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev, 80 int proto) 81 { 82 return false; 83 } 84 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev, 85 int proto) 86 { 87 return false; 88 } 89 90 static inline bool br_multicast_has_router_adjacent(struct net_device *dev, 91 int proto) 92 { 93 return true; 94 } 95 96 static inline bool br_multicast_enabled(const struct net_device *dev) 97 { 98 return false; 99 } 100 static inline bool br_multicast_router(const struct net_device *dev) 101 { 102 return false; 103 } 104 #endif 105 106 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING) 107 bool br_vlan_enabled(const struct net_device *dev); 108 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid); 109 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid); 110 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto); 111 int br_vlan_get_info(const struct net_device *dev, u16 vid, 112 struct bridge_vlan_info *p_vinfo); 113 #else 114 static inline bool br_vlan_enabled(const struct net_device *dev) 115 { 116 return false; 117 } 118 119 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 120 { 121 return -EINVAL; 122 } 123 124 static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 125 { 126 return -EINVAL; 127 } 128 129 static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 130 { 131 return -EINVAL; 132 } 133 134 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid, 135 struct bridge_vlan_info *p_vinfo) 136 { 137 return -EINVAL; 138 } 139 #endif 140 141 #if IS_ENABLED(CONFIG_BRIDGE) 142 struct net_device *br_fdb_find_port(const struct net_device *br_dev, 143 const unsigned char *addr, 144 __u16 vid); 145 void br_fdb_clear_offload(const struct net_device *dev, u16 vid); 146 bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag); 147 u8 br_port_get_stp_state(const struct net_device *dev); 148 clock_t br_get_ageing_time(const struct net_device *br_dev); 149 #else 150 static inline struct net_device * 151 br_fdb_find_port(const struct net_device *br_dev, 152 const unsigned char *addr, 153 __u16 vid) 154 { 155 return NULL; 156 } 157 158 static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid) 159 { 160 } 161 162 static inline bool 163 br_port_flag_is_set(const struct net_device *dev, unsigned long flag) 164 { 165 return false; 166 } 167 168 static inline u8 br_port_get_stp_state(const struct net_device *dev) 169 { 170 return BR_STATE_DISABLED; 171 } 172 173 static inline clock_t br_get_ageing_time(const struct net_device *br_dev) 174 { 175 return 0; 176 } 177 #endif 178 179 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_NET_SWITCHDEV) 180 181 int switchdev_bridge_port_offload(struct net_device *brport_dev, 182 struct net_device *dev, const void *ctx, 183 struct notifier_block *atomic_nb, 184 struct notifier_block *blocking_nb, 185 struct netlink_ext_ack *extack); 186 void switchdev_bridge_port_unoffload(struct net_device *brport_dev, 187 const void *ctx, 188 struct notifier_block *atomic_nb, 189 struct notifier_block *blocking_nb); 190 191 #else 192 193 static inline int 194 switchdev_bridge_port_offload(struct net_device *brport_dev, 195 struct net_device *dev, const void *ctx, 196 struct notifier_block *atomic_nb, 197 struct notifier_block *blocking_nb, 198 struct netlink_ext_ack *extack) 199 { 200 return -EINVAL; 201 } 202 203 static inline void 204 switchdev_bridge_port_unoffload(struct net_device *brport_dev, 205 const void *ctx, 206 struct notifier_block *atomic_nb, 207 struct notifier_block *blocking_nb) 208 { 209 } 210 #endif 211 212 #endif 213