1 /* 2 * Linux ethernet bridge 3 * 4 * Authors: 5 * Lennert Buytenhek <buytenh@gnu.org> 6 * 7 * $Id: br_private.h,v 1.7 2001/12/24 00:59:55 davem Exp $ 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License 11 * as published by the Free Software Foundation; either version 12 * 2 of the License, or (at your option) any later version. 13 */ 14 15 #ifndef _BR_PRIVATE_H 16 #define _BR_PRIVATE_H 17 18 #include <linux/netdevice.h> 19 #include <linux/miscdevice.h> 20 #include <linux/if_bridge.h> 21 22 #define BR_HASH_BITS 8 23 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 24 25 #define BR_HOLD_TIME (1*HZ) 26 27 #define BR_PORT_BITS 10 28 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 29 30 #define BR_PORT_DEBOUNCE (HZ/10) 31 32 #define BR_VERSION "2.1" 33 34 typedef struct bridge_id bridge_id; 35 typedef struct mac_addr mac_addr; 36 typedef __u16 port_id; 37 38 struct bridge_id 39 { 40 unsigned char prio[2]; 41 unsigned char addr[6]; 42 }; 43 44 struct mac_addr 45 { 46 unsigned char addr[6]; 47 }; 48 49 struct net_bridge_fdb_entry 50 { 51 struct hlist_node hlist; 52 struct net_bridge_port *dst; 53 54 struct rcu_head rcu; 55 atomic_t use_count; 56 unsigned long ageing_timer; 57 mac_addr addr; 58 unsigned char is_local; 59 unsigned char is_static; 60 }; 61 62 struct net_bridge_port 63 { 64 struct net_bridge *br; 65 struct net_device *dev; 66 struct list_head list; 67 68 /* STP */ 69 u8 priority; 70 u8 state; 71 u16 port_no; 72 unsigned char topology_change_ack; 73 unsigned char config_pending; 74 port_id port_id; 75 port_id designated_port; 76 bridge_id designated_root; 77 bridge_id designated_bridge; 78 u32 path_cost; 79 u32 designated_cost; 80 81 struct timer_list forward_delay_timer; 82 struct timer_list hold_timer; 83 struct timer_list message_age_timer; 84 struct kobject kobj; 85 struct work_struct carrier_check; 86 struct rcu_head rcu; 87 }; 88 89 struct net_bridge 90 { 91 spinlock_t lock; 92 struct list_head port_list; 93 struct net_device *dev; 94 struct net_device_stats statistics; 95 spinlock_t hash_lock; 96 struct hlist_head hash[BR_HASH_SIZE]; 97 struct list_head age_list; 98 unsigned long feature_mask; 99 100 /* STP */ 101 bridge_id designated_root; 102 bridge_id bridge_id; 103 u32 root_path_cost; 104 unsigned long max_age; 105 unsigned long hello_time; 106 unsigned long forward_delay; 107 unsigned long bridge_max_age; 108 unsigned long ageing_time; 109 unsigned long bridge_hello_time; 110 unsigned long bridge_forward_delay; 111 112 u16 root_port; 113 unsigned char stp_enabled; 114 unsigned char topology_change; 115 unsigned char topology_change_detected; 116 117 struct timer_list hello_timer; 118 struct timer_list tcn_timer; 119 struct timer_list topology_change_timer; 120 struct timer_list gc_timer; 121 struct kobject ifobj; 122 }; 123 124 extern struct notifier_block br_device_notifier; 125 extern const unsigned char bridge_ula[6]; 126 127 /* called under bridge lock */ 128 static inline int br_is_root_bridge(const struct net_bridge *br) 129 { 130 return !memcmp(&br->bridge_id, &br->designated_root, 8); 131 } 132 133 134 /* br_device.c */ 135 extern void br_dev_setup(struct net_device *dev); 136 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 137 138 /* br_fdb.c */ 139 extern void br_fdb_init(void); 140 extern void br_fdb_fini(void); 141 extern void br_fdb_changeaddr(struct net_bridge_port *p, 142 const unsigned char *newaddr); 143 extern void br_fdb_cleanup(unsigned long arg); 144 extern void br_fdb_delete_by_port(struct net_bridge *br, 145 struct net_bridge_port *p); 146 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 147 const unsigned char *addr); 148 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, 149 unsigned char *addr); 150 extern void br_fdb_put(struct net_bridge_fdb_entry *ent); 151 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 152 unsigned long count, unsigned long off); 153 extern int br_fdb_insert(struct net_bridge *br, 154 struct net_bridge_port *source, 155 const unsigned char *addr); 156 extern void br_fdb_update(struct net_bridge *br, 157 struct net_bridge_port *source, 158 const unsigned char *addr); 159 160 /* br_forward.c */ 161 extern void br_deliver(const struct net_bridge_port *to, 162 struct sk_buff *skb); 163 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 164 extern void br_forward(const struct net_bridge_port *to, 165 struct sk_buff *skb); 166 extern int br_forward_finish(struct sk_buff *skb); 167 extern void br_flood_deliver(struct net_bridge *br, 168 struct sk_buff *skb, 169 int clone); 170 extern void br_flood_forward(struct net_bridge *br, 171 struct sk_buff *skb, 172 int clone); 173 174 /* br_if.c */ 175 extern int br_add_bridge(const char *name); 176 extern int br_del_bridge(const char *name); 177 extern void br_cleanup_bridges(void); 178 extern int br_add_if(struct net_bridge *br, 179 struct net_device *dev); 180 extern int br_del_if(struct net_bridge *br, 181 struct net_device *dev); 182 extern int br_min_mtu(const struct net_bridge *br); 183 extern void br_features_recompute(struct net_bridge *br); 184 185 /* br_input.c */ 186 extern int br_handle_frame_finish(struct sk_buff *skb); 187 extern int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb); 188 189 /* br_ioctl.c */ 190 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 191 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg); 192 193 /* br_netfilter.c */ 194 extern int br_netfilter_init(void); 195 extern void br_netfilter_fini(void); 196 197 /* br_stp.c */ 198 extern void br_log_state(const struct net_bridge_port *p); 199 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 200 u16 port_no); 201 extern void br_init_port(struct net_bridge_port *p); 202 extern void br_become_designated_port(struct net_bridge_port *p); 203 204 /* br_stp_if.c */ 205 extern void br_stp_enable_bridge(struct net_bridge *br); 206 extern void br_stp_disable_bridge(struct net_bridge *br); 207 extern void br_stp_enable_port(struct net_bridge_port *p); 208 extern void br_stp_disable_port(struct net_bridge_port *p); 209 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 210 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 211 extern void br_stp_set_bridge_priority(struct net_bridge *br, 212 u16 newprio); 213 extern void br_stp_set_port_priority(struct net_bridge_port *p, 214 u8 newprio); 215 extern void br_stp_set_path_cost(struct net_bridge_port *p, 216 u32 path_cost); 217 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 218 219 /* br_stp_bpdu.c */ 220 extern int br_stp_handle_bpdu(struct sk_buff *skb); 221 222 /* br_stp_timer.c */ 223 extern void br_stp_timer_init(struct net_bridge *br); 224 extern void br_stp_port_timer_init(struct net_bridge_port *p); 225 extern unsigned long br_timer_value(const struct timer_list *timer); 226 227 /* br.c */ 228 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, 229 unsigned char *addr); 230 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); 231 232 233 #ifdef CONFIG_SYSFS 234 /* br_sysfs_if.c */ 235 extern int br_sysfs_addif(struct net_bridge_port *p); 236 extern void br_sysfs_removeif(struct net_bridge_port *p); 237 extern void br_sysfs_freeif(struct net_bridge_port *p); 238 239 /* br_sysfs_br.c */ 240 extern int br_sysfs_addbr(struct net_device *dev); 241 extern void br_sysfs_delbr(struct net_device *dev); 242 243 #else 244 245 #define br_sysfs_addif(p) (0) 246 #define br_sysfs_removeif(p) do { } while(0) 247 #define br_sysfs_freeif(p) kfree(p) 248 #define br_sysfs_addbr(dev) (0) 249 #define br_sysfs_delbr(dev) do { } while(0) 250 #endif /* CONFIG_SYSFS */ 251 252 #endif 253