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 #define BR_TX_FWD_OFFLOAD BIT(20) 61 62 #define BR_DEFAULT_AGEING_TIME (300 * HZ) 63 64 extern void brioctl_set(int (*ioctl_hook)(struct net *, unsigned int, void __user *)); 65 66 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_IGMP_SNOOPING) 67 int br_multicast_list_adjacent(struct net_device *dev, 68 struct list_head *br_ip_list); 69 bool br_multicast_has_querier_anywhere(struct net_device *dev, int proto); 70 bool br_multicast_has_querier_adjacent(struct net_device *dev, int proto); 71 bool br_multicast_has_router_adjacent(struct net_device *dev, int proto); 72 bool br_multicast_enabled(const struct net_device *dev); 73 bool br_multicast_router(const struct net_device *dev); 74 #else 75 static inline int br_multicast_list_adjacent(struct net_device *dev, 76 struct list_head *br_ip_list) 77 { 78 return 0; 79 } 80 static inline bool br_multicast_has_querier_anywhere(struct net_device *dev, 81 int proto) 82 { 83 return false; 84 } 85 static inline bool br_multicast_has_querier_adjacent(struct net_device *dev, 86 int proto) 87 { 88 return false; 89 } 90 91 static inline bool br_multicast_has_router_adjacent(struct net_device *dev, 92 int proto) 93 { 94 return true; 95 } 96 97 static inline bool br_multicast_enabled(const struct net_device *dev) 98 { 99 return false; 100 } 101 static inline bool br_multicast_router(const struct net_device *dev) 102 { 103 return false; 104 } 105 #endif 106 107 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_BRIDGE_VLAN_FILTERING) 108 bool br_vlan_enabled(const struct net_device *dev); 109 int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid); 110 int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid); 111 int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto); 112 int br_vlan_get_info(const struct net_device *dev, u16 vid, 113 struct bridge_vlan_info *p_vinfo); 114 #else 115 static inline bool br_vlan_enabled(const struct net_device *dev) 116 { 117 return false; 118 } 119 120 static inline int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) 121 { 122 return -EINVAL; 123 } 124 125 static inline int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) 126 { 127 return -EINVAL; 128 } 129 130 static inline int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) 131 { 132 return -EINVAL; 133 } 134 135 static inline int br_vlan_get_info(const struct net_device *dev, u16 vid, 136 struct bridge_vlan_info *p_vinfo) 137 { 138 return -EINVAL; 139 } 140 #endif 141 142 #if IS_ENABLED(CONFIG_BRIDGE) 143 struct net_device *br_fdb_find_port(const struct net_device *br_dev, 144 const unsigned char *addr, 145 __u16 vid); 146 void br_fdb_clear_offload(const struct net_device *dev, u16 vid); 147 bool br_port_flag_is_set(const struct net_device *dev, unsigned long flag); 148 u8 br_port_get_stp_state(const struct net_device *dev); 149 clock_t br_get_ageing_time(const struct net_device *br_dev); 150 #else 151 static inline struct net_device * 152 br_fdb_find_port(const struct net_device *br_dev, 153 const unsigned char *addr, 154 __u16 vid) 155 { 156 return NULL; 157 } 158 159 static inline void br_fdb_clear_offload(const struct net_device *dev, u16 vid) 160 { 161 } 162 163 static inline bool 164 br_port_flag_is_set(const struct net_device *dev, unsigned long flag) 165 { 166 return false; 167 } 168 169 static inline u8 br_port_get_stp_state(const struct net_device *dev) 170 { 171 return BR_STATE_DISABLED; 172 } 173 174 static inline clock_t br_get_ageing_time(const struct net_device *br_dev) 175 { 176 return 0; 177 } 178 #endif 179 180 #if IS_ENABLED(CONFIG_BRIDGE) && IS_ENABLED(CONFIG_NET_SWITCHDEV) 181 182 int switchdev_bridge_port_offload(struct net_device *brport_dev, 183 struct net_device *dev, const void *ctx, 184 struct notifier_block *atomic_nb, 185 struct notifier_block *blocking_nb, 186 bool tx_fwd_offload, 187 struct netlink_ext_ack *extack); 188 void switchdev_bridge_port_unoffload(struct net_device *brport_dev, 189 const void *ctx, 190 struct notifier_block *atomic_nb, 191 struct notifier_block *blocking_nb); 192 193 #else 194 195 static inline int 196 switchdev_bridge_port_offload(struct net_device *brport_dev, 197 struct net_device *dev, const void *ctx, 198 struct notifier_block *atomic_nb, 199 struct notifier_block *blocking_nb, 200 bool tx_fwd_offload, 201 struct netlink_ext_ack *extack) 202 { 203 return -EINVAL; 204 } 205 206 static inline void 207 switchdev_bridge_port_unoffload(struct net_device *brport_dev, 208 const void *ctx, 209 struct notifier_block *atomic_nb, 210 struct notifier_block *blocking_nb) 211 { 212 } 213 #endif 214 215 #endif 216