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/if_bridge.h> 20 21 #define BR_HASH_BITS 8 22 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 23 24 #define BR_HOLD_TIME (1*HZ) 25 26 #define BR_PORT_BITS 10 27 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 28 29 #define BR_VERSION "2.2" 30 31 typedef struct bridge_id bridge_id; 32 typedef struct mac_addr mac_addr; 33 typedef __u16 port_id; 34 35 struct bridge_id 36 { 37 unsigned char prio[2]; 38 unsigned char addr[6]; 39 }; 40 41 struct mac_addr 42 { 43 unsigned char addr[6]; 44 }; 45 46 struct net_bridge_fdb_entry 47 { 48 struct hlist_node hlist; 49 struct net_bridge_port *dst; 50 51 struct rcu_head rcu; 52 atomic_t use_count; 53 unsigned long ageing_timer; 54 mac_addr addr; 55 unsigned char is_local; 56 unsigned char is_static; 57 }; 58 59 struct net_bridge_port 60 { 61 struct net_bridge *br; 62 struct net_device *dev; 63 struct list_head list; 64 65 /* STP */ 66 u8 priority; 67 u8 state; 68 u16 port_no; 69 unsigned char topology_change_ack; 70 unsigned char config_pending; 71 port_id port_id; 72 port_id designated_port; 73 bridge_id designated_root; 74 bridge_id designated_bridge; 75 u32 path_cost; 76 u32 designated_cost; 77 78 struct timer_list forward_delay_timer; 79 struct timer_list hold_timer; 80 struct timer_list message_age_timer; 81 struct kobject kobj; 82 struct rcu_head rcu; 83 }; 84 85 struct net_bridge 86 { 87 spinlock_t lock; 88 struct list_head port_list; 89 struct net_device *dev; 90 struct net_device_stats statistics; 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 96 /* STP */ 97 bridge_id designated_root; 98 bridge_id bridge_id; 99 u32 root_path_cost; 100 unsigned long max_age; 101 unsigned long hello_time; 102 unsigned long forward_delay; 103 unsigned long bridge_max_age; 104 unsigned long ageing_time; 105 unsigned long bridge_hello_time; 106 unsigned long bridge_forward_delay; 107 108 u8 group_addr[ETH_ALEN]; 109 u16 root_port; 110 unsigned char stp_enabled; 111 unsigned char topology_change; 112 unsigned char topology_change_detected; 113 114 struct timer_list hello_timer; 115 struct timer_list tcn_timer; 116 struct timer_list topology_change_timer; 117 struct timer_list gc_timer; 118 struct kobject ifobj; 119 }; 120 121 extern struct notifier_block br_device_notifier; 122 extern const u8 br_group_address[ETH_ALEN]; 123 124 /* called under bridge lock */ 125 static inline int br_is_root_bridge(const struct net_bridge *br) 126 { 127 return !memcmp(&br->bridge_id, &br->designated_root, 8); 128 } 129 130 131 /* br_device.c */ 132 extern void br_dev_setup(struct net_device *dev); 133 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 134 135 /* br_fdb.c */ 136 extern void br_fdb_init(void); 137 extern void br_fdb_fini(void); 138 extern void br_fdb_changeaddr(struct net_bridge_port *p, 139 const unsigned char *newaddr); 140 extern void br_fdb_cleanup(unsigned long arg); 141 extern void br_fdb_delete_by_port(struct net_bridge *br, 142 const struct net_bridge_port *p, int do_all); 143 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 144 const unsigned char *addr); 145 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, 146 unsigned char *addr); 147 extern void br_fdb_put(struct net_bridge_fdb_entry *ent); 148 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 149 unsigned long count, unsigned long off); 150 extern int br_fdb_insert(struct net_bridge *br, 151 struct net_bridge_port *source, 152 const unsigned char *addr); 153 extern void br_fdb_update(struct net_bridge *br, 154 struct net_bridge_port *source, 155 const unsigned char *addr); 156 157 /* br_forward.c */ 158 extern void br_deliver(const struct net_bridge_port *to, 159 struct sk_buff *skb); 160 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 161 extern void br_forward(const struct net_bridge_port *to, 162 struct sk_buff *skb); 163 extern int br_forward_finish(struct sk_buff *skb); 164 extern void br_flood_deliver(struct net_bridge *br, 165 struct sk_buff *skb, 166 int clone); 167 extern void br_flood_forward(struct net_bridge *br, 168 struct sk_buff *skb, 169 int clone); 170 171 /* br_if.c */ 172 extern void br_port_carrier_check(struct net_bridge_port *p); 173 extern int br_add_bridge(const char *name); 174 extern int br_del_bridge(const char *name); 175 extern void br_cleanup_bridges(void); 176 extern int br_add_if(struct net_bridge *br, 177 struct net_device *dev); 178 extern int br_del_if(struct net_bridge *br, 179 struct net_device *dev); 180 extern int br_min_mtu(const struct net_bridge *br); 181 extern void br_features_recompute(struct net_bridge *br); 182 183 /* br_input.c */ 184 extern int br_handle_frame_finish(struct sk_buff *skb); 185 extern int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb); 186 187 /* br_ioctl.c */ 188 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 189 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg); 190 191 /* br_netfilter.c */ 192 #ifdef CONFIG_BRIDGE_NETFILTER 193 extern int br_netfilter_init(void); 194 extern void br_netfilter_fini(void); 195 #else 196 #define br_netfilter_init() (0) 197 #define br_netfilter_fini() do { } while(0) 198 #endif 199 200 /* br_stp.c */ 201 extern void br_log_state(const struct net_bridge_port *p); 202 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 203 u16 port_no); 204 extern void br_init_port(struct net_bridge_port *p); 205 extern void br_become_designated_port(struct net_bridge_port *p); 206 207 /* br_stp_if.c */ 208 extern void br_stp_enable_bridge(struct net_bridge *br); 209 extern void br_stp_disable_bridge(struct net_bridge *br); 210 extern void br_stp_enable_port(struct net_bridge_port *p); 211 extern void br_stp_disable_port(struct net_bridge_port *p); 212 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 213 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 214 extern void br_stp_set_bridge_priority(struct net_bridge *br, 215 u16 newprio); 216 extern void br_stp_set_port_priority(struct net_bridge_port *p, 217 u8 newprio); 218 extern void br_stp_set_path_cost(struct net_bridge_port *p, 219 u32 path_cost); 220 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 221 222 /* br_stp_bpdu.c */ 223 extern int br_stp_rcv(struct sk_buff *skb, struct net_device *dev, 224 struct packet_type *pt, struct net_device *orig_dev); 225 226 /* br_stp_timer.c */ 227 extern void br_stp_timer_init(struct net_bridge *br); 228 extern void br_stp_port_timer_init(struct net_bridge_port *p); 229 extern unsigned long br_timer_value(const struct timer_list *timer); 230 231 /* br.c */ 232 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, 233 unsigned char *addr); 234 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); 235 236 237 /* br_netlink.c */ 238 extern void br_netlink_init(void); 239 extern void br_netlink_fini(void); 240 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 241 242 #ifdef CONFIG_SYSFS 243 /* br_sysfs_if.c */ 244 extern struct sysfs_ops brport_sysfs_ops; 245 extern int br_sysfs_addif(struct net_bridge_port *p); 246 247 /* br_sysfs_br.c */ 248 extern int br_sysfs_addbr(struct net_device *dev); 249 extern void br_sysfs_delbr(struct net_device *dev); 250 251 #else 252 253 #define br_sysfs_addif(p) (0) 254 #define br_sysfs_addbr(dev) (0) 255 #define br_sysfs_delbr(dev) do { } while(0) 256 #endif /* CONFIG_SYSFS */ 257 258 #endif 259