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 atomic_t use_count; 55 unsigned long ageing_timer; 56 mac_addr addr; 57 unsigned char is_local; 58 unsigned char is_static; 59 }; 60 61 struct net_bridge_port 62 { 63 struct net_bridge *br; 64 struct net_device *dev; 65 struct list_head list; 66 67 /* STP */ 68 u8 priority; 69 u8 state; 70 u16 port_no; 71 unsigned char topology_change_ack; 72 unsigned char config_pending; 73 port_id port_id; 74 port_id designated_port; 75 bridge_id designated_root; 76 bridge_id designated_bridge; 77 u32 path_cost; 78 u32 designated_cost; 79 80 struct timer_list forward_delay_timer; 81 struct timer_list hold_timer; 82 struct timer_list message_age_timer; 83 struct kobject kobj; 84 struct rcu_head rcu; 85 }; 86 87 struct net_bridge 88 { 89 spinlock_t lock; 90 struct list_head port_list; 91 struct net_device *dev; 92 spinlock_t hash_lock; 93 struct hlist_head hash[BR_HASH_SIZE]; 94 struct list_head age_list; 95 unsigned long feature_mask; 96 #ifdef CONFIG_BRIDGE_NETFILTER 97 struct rtable fake_rtable; 98 #endif 99 unsigned long flags; 100 #define BR_SET_MAC_ADDR 0x00000001 101 102 /* STP */ 103 bridge_id designated_root; 104 bridge_id bridge_id; 105 u32 root_path_cost; 106 unsigned long max_age; 107 unsigned long hello_time; 108 unsigned long forward_delay; 109 unsigned long bridge_max_age; 110 unsigned long ageing_time; 111 unsigned long bridge_hello_time; 112 unsigned long bridge_forward_delay; 113 114 u8 group_addr[ETH_ALEN]; 115 u16 root_port; 116 117 enum { 118 BR_NO_STP, /* no spanning tree */ 119 BR_KERNEL_STP, /* old STP in kernel */ 120 BR_USER_STP, /* new RSTP in userspace */ 121 } stp_enabled; 122 123 unsigned char topology_change; 124 unsigned char topology_change_detected; 125 126 struct timer_list hello_timer; 127 struct timer_list tcn_timer; 128 struct timer_list topology_change_timer; 129 struct timer_list gc_timer; 130 struct kobject *ifobj; 131 }; 132 133 extern struct notifier_block br_device_notifier; 134 extern const u8 br_group_address[ETH_ALEN]; 135 136 /* called under bridge lock */ 137 static inline int br_is_root_bridge(const struct net_bridge *br) 138 { 139 return !memcmp(&br->bridge_id, &br->designated_root, 8); 140 } 141 142 /* br_device.c */ 143 extern void br_dev_setup(struct net_device *dev); 144 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 145 146 /* br_fdb.c */ 147 extern int br_fdb_init(void); 148 extern void br_fdb_fini(void); 149 extern void br_fdb_flush(struct net_bridge *br); 150 extern void br_fdb_changeaddr(struct net_bridge_port *p, 151 const unsigned char *newaddr); 152 extern void br_fdb_cleanup(unsigned long arg); 153 extern void br_fdb_delete_by_port(struct net_bridge *br, 154 const struct net_bridge_port *p, int do_all); 155 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 156 const unsigned char *addr); 157 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, 158 unsigned char *addr); 159 extern void br_fdb_put(struct net_bridge_fdb_entry *ent); 160 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 161 unsigned long count, unsigned long off); 162 extern int br_fdb_insert(struct net_bridge *br, 163 struct net_bridge_port *source, 164 const unsigned char *addr); 165 extern void br_fdb_update(struct net_bridge *br, 166 struct net_bridge_port *source, 167 const unsigned char *addr); 168 169 /* br_forward.c */ 170 extern void br_deliver(const struct net_bridge_port *to, 171 struct sk_buff *skb); 172 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 173 extern void br_forward(const struct net_bridge_port *to, 174 struct sk_buff *skb); 175 extern int br_forward_finish(struct sk_buff *skb); 176 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 177 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb); 178 179 /* br_if.c */ 180 extern void br_port_carrier_check(struct net_bridge_port *p); 181 extern int br_add_bridge(struct net *net, const char *name); 182 extern int br_del_bridge(struct net *net, const char *name); 183 extern void br_net_exit(struct net *net); 184 extern int br_add_if(struct net_bridge *br, 185 struct net_device *dev); 186 extern int br_del_if(struct net_bridge *br, 187 struct net_device *dev); 188 extern int br_min_mtu(const struct net_bridge *br); 189 extern void br_features_recompute(struct net_bridge *br); 190 191 /* br_input.c */ 192 extern int br_handle_frame_finish(struct sk_buff *skb); 193 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 194 struct sk_buff *skb); 195 196 /* br_ioctl.c */ 197 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 198 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 199 200 /* br_netfilter.c */ 201 #ifdef CONFIG_BRIDGE_NETFILTER 202 extern int br_netfilter_init(void); 203 extern void br_netfilter_fini(void); 204 extern void br_netfilter_rtable_init(struct net_bridge *); 205 #else 206 #define br_netfilter_init() (0) 207 #define br_netfilter_fini() do { } while(0) 208 #define br_netfilter_rtable_init(x) 209 #endif 210 211 /* br_stp.c */ 212 extern void br_log_state(const struct net_bridge_port *p); 213 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 214 u16 port_no); 215 extern void br_init_port(struct net_bridge_port *p); 216 extern void br_become_designated_port(struct net_bridge_port *p); 217 218 /* br_stp_if.c */ 219 extern void br_stp_enable_bridge(struct net_bridge *br); 220 extern void br_stp_disable_bridge(struct net_bridge *br); 221 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 222 extern void br_stp_enable_port(struct net_bridge_port *p); 223 extern void br_stp_disable_port(struct net_bridge_port *p); 224 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 225 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 226 extern void br_stp_set_bridge_priority(struct net_bridge *br, 227 u16 newprio); 228 extern void br_stp_set_port_priority(struct net_bridge_port *p, 229 u8 newprio); 230 extern void br_stp_set_path_cost(struct net_bridge_port *p, 231 u32 path_cost); 232 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 233 234 /* br_stp_bpdu.c */ 235 struct stp_proto; 236 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 237 struct net_device *dev); 238 239 /* br_stp_timer.c */ 240 extern void br_stp_timer_init(struct net_bridge *br); 241 extern void br_stp_port_timer_init(struct net_bridge_port *p); 242 extern unsigned long br_timer_value(const struct timer_list *timer); 243 244 /* br.c */ 245 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, 246 unsigned char *addr); 247 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); 248 249 250 /* 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