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 13 #ifndef _BR_PRIVATE_H 14 #define _BR_PRIVATE_H 15 16 #include <linux/netdevice.h> 17 #include <linux/if_bridge.h> 18 #include <net/route.h> 19 20 #define BR_HASH_BITS 8 21 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 22 23 #define BR_HOLD_TIME (1*HZ) 24 25 #define BR_PORT_BITS 10 26 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 27 28 #define BR_VERSION "2.3" 29 30 /* Path to usermode spanning tree program */ 31 #define BR_STP_PROG "/sbin/bridge-stp" 32 33 typedef struct bridge_id bridge_id; 34 typedef struct mac_addr mac_addr; 35 typedef __u16 port_id; 36 37 struct bridge_id 38 { 39 unsigned char prio[2]; 40 unsigned char addr[6]; 41 }; 42 43 struct mac_addr 44 { 45 unsigned char addr[6]; 46 }; 47 48 struct net_bridge_fdb_entry 49 { 50 struct hlist_node hlist; 51 struct net_bridge_port *dst; 52 53 struct rcu_head rcu; 54 unsigned long ageing_timer; 55 mac_addr addr; 56 unsigned char is_local; 57 unsigned char is_static; 58 }; 59 60 struct net_bridge_port 61 { 62 struct net_bridge *br; 63 struct net_device *dev; 64 struct list_head list; 65 66 /* STP */ 67 u8 priority; 68 u8 state; 69 u16 port_no; 70 unsigned char topology_change_ack; 71 unsigned char config_pending; 72 port_id port_id; 73 port_id designated_port; 74 bridge_id designated_root; 75 bridge_id designated_bridge; 76 u32 path_cost; 77 u32 designated_cost; 78 79 struct timer_list forward_delay_timer; 80 struct timer_list hold_timer; 81 struct timer_list message_age_timer; 82 struct kobject kobj; 83 struct rcu_head rcu; 84 85 unsigned long flags; 86 #define BR_HAIRPIN_MODE 0x00000001 87 }; 88 89 struct net_bridge 90 { 91 spinlock_t lock; 92 struct list_head port_list; 93 struct net_device *dev; 94 spinlock_t hash_lock; 95 struct hlist_head hash[BR_HASH_SIZE]; 96 struct list_head age_list; 97 unsigned long feature_mask; 98 #ifdef CONFIG_BRIDGE_NETFILTER 99 struct rtable fake_rtable; 100 #endif 101 unsigned long flags; 102 #define BR_SET_MAC_ADDR 0x00000001 103 104 /* STP */ 105 bridge_id designated_root; 106 bridge_id bridge_id; 107 u32 root_path_cost; 108 unsigned long max_age; 109 unsigned long hello_time; 110 unsigned long forward_delay; 111 unsigned long bridge_max_age; 112 unsigned long ageing_time; 113 unsigned long bridge_hello_time; 114 unsigned long bridge_forward_delay; 115 116 u8 group_addr[ETH_ALEN]; 117 u16 root_port; 118 119 enum { 120 BR_NO_STP, /* no spanning tree */ 121 BR_KERNEL_STP, /* old STP in kernel */ 122 BR_USER_STP, /* new RSTP in userspace */ 123 } stp_enabled; 124 125 unsigned char topology_change; 126 unsigned char topology_change_detected; 127 128 struct timer_list hello_timer; 129 struct timer_list tcn_timer; 130 struct timer_list topology_change_timer; 131 struct timer_list gc_timer; 132 struct kobject *ifobj; 133 }; 134 135 extern struct notifier_block br_device_notifier; 136 extern const u8 br_group_address[ETH_ALEN]; 137 138 /* called under bridge lock */ 139 static inline int br_is_root_bridge(const struct net_bridge *br) 140 { 141 return !memcmp(&br->bridge_id, &br->designated_root, 8); 142 } 143 144 /* br_device.c */ 145 extern void br_dev_setup(struct net_device *dev); 146 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb, 147 struct net_device *dev); 148 149 /* br_fdb.c */ 150 extern int br_fdb_init(void); 151 extern void br_fdb_fini(void); 152 extern void br_fdb_flush(struct net_bridge *br); 153 extern void br_fdb_changeaddr(struct net_bridge_port *p, 154 const unsigned char *newaddr); 155 extern void br_fdb_cleanup(unsigned long arg); 156 extern void br_fdb_delete_by_port(struct net_bridge *br, 157 const struct net_bridge_port *p, int do_all); 158 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 159 const unsigned char *addr); 160 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 161 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 162 unsigned long count, unsigned long off); 163 extern int br_fdb_insert(struct net_bridge *br, 164 struct net_bridge_port *source, 165 const unsigned char *addr); 166 extern void br_fdb_update(struct net_bridge *br, 167 struct net_bridge_port *source, 168 const unsigned char *addr); 169 170 /* br_forward.c */ 171 extern void br_deliver(const struct net_bridge_port *to, 172 struct sk_buff *skb); 173 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 174 extern void br_forward(const struct net_bridge_port *to, 175 struct sk_buff *skb); 176 extern int br_forward_finish(struct sk_buff *skb); 177 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 178 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb); 179 180 /* br_if.c */ 181 extern void br_port_carrier_check(struct net_bridge_port *p); 182 extern int br_add_bridge(struct net *net, const char *name); 183 extern int br_del_bridge(struct net *net, const char *name); 184 extern void br_net_exit(struct net *net); 185 extern int br_add_if(struct net_bridge *br, 186 struct net_device *dev); 187 extern int br_del_if(struct net_bridge *br, 188 struct net_device *dev); 189 extern int br_min_mtu(const struct net_bridge *br); 190 extern void br_features_recompute(struct net_bridge *br); 191 192 /* br_input.c */ 193 extern int br_handle_frame_finish(struct sk_buff *skb); 194 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 195 struct sk_buff *skb); 196 197 /* br_ioctl.c */ 198 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 199 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 200 201 /* br_netfilter.c */ 202 #ifdef CONFIG_BRIDGE_NETFILTER 203 extern int br_netfilter_init(void); 204 extern void br_netfilter_fini(void); 205 extern void br_netfilter_rtable_init(struct net_bridge *); 206 #else 207 #define br_netfilter_init() (0) 208 #define br_netfilter_fini() do { } while(0) 209 #define br_netfilter_rtable_init(x) 210 #endif 211 212 /* br_stp.c */ 213 extern void br_log_state(const struct net_bridge_port *p); 214 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 215 u16 port_no); 216 extern void br_init_port(struct net_bridge_port *p); 217 extern void br_become_designated_port(struct net_bridge_port *p); 218 219 /* br_stp_if.c */ 220 extern void br_stp_enable_bridge(struct net_bridge *br); 221 extern void br_stp_disable_bridge(struct net_bridge *br); 222 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 223 extern void br_stp_enable_port(struct net_bridge_port *p); 224 extern void br_stp_disable_port(struct net_bridge_port *p); 225 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 226 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 227 extern void br_stp_set_bridge_priority(struct net_bridge *br, 228 u16 newprio); 229 extern void br_stp_set_port_priority(struct net_bridge_port *p, 230 u8 newprio); 231 extern void br_stp_set_path_cost(struct net_bridge_port *p, 232 u32 path_cost); 233 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 234 235 /* br_stp_bpdu.c */ 236 struct stp_proto; 237 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 238 struct net_device *dev); 239 240 /* br_stp_timer.c */ 241 extern void br_stp_timer_init(struct net_bridge *br); 242 extern void br_stp_port_timer_init(struct net_bridge_port *p); 243 extern unsigned long br_timer_value(const struct timer_list *timer); 244 245 /* br.c */ 246 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) 247 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 248 #endif 249 250 /* br_netlink.c */ 251 extern int br_netlink_init(void); 252 extern void br_netlink_fini(void); 253 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 254 255 #ifdef CONFIG_SYSFS 256 /* br_sysfs_if.c */ 257 extern struct sysfs_ops brport_sysfs_ops; 258 extern int br_sysfs_addif(struct net_bridge_port *p); 259 260 /* br_sysfs_br.c */ 261 extern int br_sysfs_addbr(struct net_device *dev); 262 extern void br_sysfs_delbr(struct net_device *dev); 263 264 #else 265 266 #define br_sysfs_addif(p) (0) 267 #define br_sysfs_addbr(dev) (0) 268 #define br_sysfs_delbr(dev) do { } while(0) 269 #endif /* CONFIG_SYSFS */ 270 271 #endif 272