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 86 struct net_bridge 87 { 88 spinlock_t lock; 89 struct list_head port_list; 90 struct net_device *dev; 91 spinlock_t hash_lock; 92 struct hlist_head hash[BR_HASH_SIZE]; 93 struct list_head age_list; 94 unsigned long feature_mask; 95 #ifdef CONFIG_BRIDGE_NETFILTER 96 struct rtable fake_rtable; 97 #endif 98 unsigned long flags; 99 #define BR_SET_MAC_ADDR 0x00000001 100 101 /* STP */ 102 bridge_id designated_root; 103 bridge_id bridge_id; 104 u32 root_path_cost; 105 unsigned long max_age; 106 unsigned long hello_time; 107 unsigned long forward_delay; 108 unsigned long bridge_max_age; 109 unsigned long ageing_time; 110 unsigned long bridge_hello_time; 111 unsigned long bridge_forward_delay; 112 113 u8 group_addr[ETH_ALEN]; 114 u16 root_port; 115 116 enum { 117 BR_NO_STP, /* no spanning tree */ 118 BR_KERNEL_STP, /* old STP in kernel */ 119 BR_USER_STP, /* new RSTP in userspace */ 120 } stp_enabled; 121 122 unsigned char topology_change; 123 unsigned char topology_change_detected; 124 125 struct timer_list hello_timer; 126 struct timer_list tcn_timer; 127 struct timer_list topology_change_timer; 128 struct timer_list gc_timer; 129 struct kobject *ifobj; 130 }; 131 132 extern struct notifier_block br_device_notifier; 133 extern const u8 br_group_address[ETH_ALEN]; 134 135 /* called under bridge lock */ 136 static inline int br_is_root_bridge(const struct net_bridge *br) 137 { 138 return !memcmp(&br->bridge_id, &br->designated_root, 8); 139 } 140 141 /* br_device.c */ 142 extern void br_dev_setup(struct net_device *dev); 143 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 144 145 /* br_fdb.c */ 146 extern int br_fdb_init(void); 147 extern void br_fdb_fini(void); 148 extern void br_fdb_flush(struct net_bridge *br); 149 extern void br_fdb_changeaddr(struct net_bridge_port *p, 150 const unsigned char *newaddr); 151 extern void br_fdb_cleanup(unsigned long arg); 152 extern void br_fdb_delete_by_port(struct net_bridge *br, 153 const struct net_bridge_port *p, int do_all); 154 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 155 const unsigned char *addr); 156 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr); 157 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 158 unsigned long count, unsigned long off); 159 extern int br_fdb_insert(struct net_bridge *br, 160 struct net_bridge_port *source, 161 const unsigned char *addr); 162 extern void br_fdb_update(struct net_bridge *br, 163 struct net_bridge_port *source, 164 const unsigned char *addr); 165 166 /* br_forward.c */ 167 extern void br_deliver(const struct net_bridge_port *to, 168 struct sk_buff *skb); 169 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 170 extern void br_forward(const struct net_bridge_port *to, 171 struct sk_buff *skb); 172 extern int br_forward_finish(struct sk_buff *skb); 173 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 174 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb); 175 176 /* br_if.c */ 177 extern void br_port_carrier_check(struct net_bridge_port *p); 178 extern int br_add_bridge(struct net *net, const char *name); 179 extern int br_del_bridge(struct net *net, const char *name); 180 extern void br_net_exit(struct net *net); 181 extern int br_add_if(struct net_bridge *br, 182 struct net_device *dev); 183 extern int br_del_if(struct net_bridge *br, 184 struct net_device *dev); 185 extern int br_min_mtu(const struct net_bridge *br); 186 extern void br_features_recompute(struct net_bridge *br); 187 188 /* br_input.c */ 189 extern int br_handle_frame_finish(struct sk_buff *skb); 190 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 191 struct sk_buff *skb); 192 193 /* br_ioctl.c */ 194 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 195 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 196 197 /* br_netfilter.c */ 198 #ifdef CONFIG_BRIDGE_NETFILTER 199 extern int br_netfilter_init(void); 200 extern void br_netfilter_fini(void); 201 extern void br_netfilter_rtable_init(struct net_bridge *); 202 #else 203 #define br_netfilter_init() (0) 204 #define br_netfilter_fini() do { } while(0) 205 #define br_netfilter_rtable_init(x) 206 #endif 207 208 /* br_stp.c */ 209 extern void br_log_state(const struct net_bridge_port *p); 210 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 211 u16 port_no); 212 extern void br_init_port(struct net_bridge_port *p); 213 extern void br_become_designated_port(struct net_bridge_port *p); 214 215 /* br_stp_if.c */ 216 extern void br_stp_enable_bridge(struct net_bridge *br); 217 extern void br_stp_disable_bridge(struct net_bridge *br); 218 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 219 extern void br_stp_enable_port(struct net_bridge_port *p); 220 extern void br_stp_disable_port(struct net_bridge_port *p); 221 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 222 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 223 extern void br_stp_set_bridge_priority(struct net_bridge *br, 224 u16 newprio); 225 extern void br_stp_set_port_priority(struct net_bridge_port *p, 226 u8 newprio); 227 extern void br_stp_set_path_cost(struct net_bridge_port *p, 228 u32 path_cost); 229 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 230 231 /* br_stp_bpdu.c */ 232 struct stp_proto; 233 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 234 struct net_device *dev); 235 236 /* br_stp_timer.c */ 237 extern void br_stp_timer_init(struct net_bridge *br); 238 extern void br_stp_port_timer_init(struct net_bridge_port *p); 239 extern unsigned long br_timer_value(const struct timer_list *timer); 240 241 /* br.c */ 242 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE) 243 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr); 244 #endif 245 246 /* br_netlink.c */ 247 extern int br_netlink_init(void); 248 extern void br_netlink_fini(void); 249 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 250 251 #ifdef CONFIG_SYSFS 252 /* br_sysfs_if.c */ 253 extern struct sysfs_ops brport_sysfs_ops; 254 extern int br_sysfs_addif(struct net_bridge_port *p); 255 256 /* br_sysfs_br.c */ 257 extern int br_sysfs_addbr(struct net_device *dev); 258 extern void br_sysfs_delbr(struct net_device *dev); 259 260 #else 261 262 #define br_sysfs_addif(p) (0) 263 #define br_sysfs_addbr(dev) (0) 264 #define br_sysfs_delbr(dev) do { } while(0) 265 #endif /* CONFIG_SYSFS */ 266 267 #endif 268