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 "2.3" 30 31 /* Path to usermode spanning tree program */ 32 #define BR_STP_PROG "/sbin/bridge-stp" 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 rcu_head rcu; 86 }; 87 88 struct net_bridge 89 { 90 spinlock_t lock; 91 struct list_head port_list; 92 struct net_device *dev; 93 struct net_device_stats statistics; 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 99 /* STP */ 100 bridge_id designated_root; 101 bridge_id bridge_id; 102 u32 root_path_cost; 103 unsigned long max_age; 104 unsigned long hello_time; 105 unsigned long forward_delay; 106 unsigned long bridge_max_age; 107 unsigned long ageing_time; 108 unsigned long bridge_hello_time; 109 unsigned long bridge_forward_delay; 110 111 u8 group_addr[ETH_ALEN]; 112 u16 root_port; 113 114 enum { 115 BR_NO_STP, /* no spanning tree */ 116 BR_KERNEL_STP, /* old STP in kernel */ 117 BR_USER_STP, /* new RSTP in userspace */ 118 } stp_enabled; 119 120 unsigned char topology_change; 121 unsigned char topology_change_detected; 122 123 struct timer_list hello_timer; 124 struct timer_list tcn_timer; 125 struct timer_list topology_change_timer; 126 struct timer_list gc_timer; 127 struct kobject *ifobj; 128 }; 129 130 extern struct notifier_block br_device_notifier; 131 extern const u8 br_group_address[ETH_ALEN]; 132 133 /* called under bridge lock */ 134 static inline int br_is_root_bridge(const struct net_bridge *br) 135 { 136 return !memcmp(&br->bridge_id, &br->designated_root, 8); 137 } 138 139 /* br_device.c */ 140 extern void br_dev_setup(struct net_device *dev); 141 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 142 143 /* br_fdb.c */ 144 extern int br_fdb_init(void); 145 extern void br_fdb_fini(void); 146 extern void br_fdb_flush(struct net_bridge *br); 147 extern void br_fdb_changeaddr(struct net_bridge_port *p, 148 const unsigned char *newaddr); 149 extern void br_fdb_cleanup(unsigned long arg); 150 extern void br_fdb_delete_by_port(struct net_bridge *br, 151 const struct net_bridge_port *p, int do_all); 152 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 153 const unsigned char *addr); 154 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, 155 unsigned char *addr); 156 extern void br_fdb_put(struct net_bridge_fdb_entry *ent); 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(const char *name); 179 extern int br_del_bridge(const char *name); 180 extern void br_cleanup_bridges(void); 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 #else 202 #define br_netfilter_init() (0) 203 #define br_netfilter_fini() do { } while(0) 204 #endif 205 206 /* br_stp.c */ 207 extern void br_log_state(const struct net_bridge_port *p); 208 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 209 u16 port_no); 210 extern void br_init_port(struct net_bridge_port *p); 211 extern void br_become_designated_port(struct net_bridge_port *p); 212 213 /* br_stp_if.c */ 214 extern void br_stp_enable_bridge(struct net_bridge *br); 215 extern void br_stp_disable_bridge(struct net_bridge *br); 216 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 217 extern void br_stp_enable_port(struct net_bridge_port *p); 218 extern void br_stp_disable_port(struct net_bridge_port *p); 219 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 220 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 221 extern void br_stp_set_bridge_priority(struct net_bridge *br, 222 u16 newprio); 223 extern void br_stp_set_port_priority(struct net_bridge_port *p, 224 u8 newprio); 225 extern void br_stp_set_path_cost(struct net_bridge_port *p, 226 u32 path_cost); 227 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 228 229 /* br_stp_bpdu.c */ 230 extern int br_stp_rcv(struct sk_buff *skb, struct net_device *dev, 231 struct packet_type *pt, struct net_device *orig_dev); 232 233 /* br_stp_timer.c */ 234 extern void br_stp_timer_init(struct net_bridge *br); 235 extern void br_stp_port_timer_init(struct net_bridge_port *p); 236 extern unsigned long br_timer_value(const struct timer_list *timer); 237 238 /* br.c */ 239 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, 240 unsigned char *addr); 241 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); 242 243 244 /* br_netlink.c */ 245 extern int br_netlink_init(void); 246 extern void br_netlink_fini(void); 247 extern void br_ifinfo_notify(int event, struct net_bridge_port *port); 248 249 #ifdef CONFIG_SYSFS 250 /* br_sysfs_if.c */ 251 extern struct sysfs_ops brport_sysfs_ops; 252 extern int br_sysfs_addif(struct net_bridge_port *p); 253 254 /* br_sysfs_br.c */ 255 extern int br_sysfs_addbr(struct net_device *dev); 256 extern void br_sysfs_delbr(struct net_device *dev); 257 258 #else 259 260 #define br_sysfs_addif(p) (0) 261 #define br_sysfs_addbr(dev) (0) 262 #define br_sysfs_delbr(dev) do { } while(0) 263 #endif /* CONFIG_SYSFS */ 264 265 #endif 266