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 19 #define BR_HASH_BITS 8 20 #define BR_HASH_SIZE (1 << BR_HASH_BITS) 21 22 #define BR_HOLD_TIME (1*HZ) 23 24 #define BR_PORT_BITS 10 25 #define BR_MAX_PORTS (1<<BR_PORT_BITS) 26 27 #define BR_VERSION "2.3" 28 29 /* Path to usermode spanning tree program */ 30 #define BR_STP_PROG "/sbin/bridge-stp" 31 32 typedef struct bridge_id bridge_id; 33 typedef struct mac_addr mac_addr; 34 typedef __u16 port_id; 35 36 struct bridge_id 37 { 38 unsigned char prio[2]; 39 unsigned char addr[6]; 40 }; 41 42 struct mac_addr 43 { 44 unsigned char addr[6]; 45 }; 46 47 struct net_bridge_fdb_entry 48 { 49 struct hlist_node hlist; 50 struct net_bridge_port *dst; 51 52 struct rcu_head rcu; 53 atomic_t use_count; 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 unsigned long flags; 96 #define BR_SET_MAC_ADDR 0x00000001 97 98 /* STP */ 99 bridge_id designated_root; 100 bridge_id bridge_id; 101 u32 root_path_cost; 102 unsigned long max_age; 103 unsigned long hello_time; 104 unsigned long forward_delay; 105 unsigned long bridge_max_age; 106 unsigned long ageing_time; 107 unsigned long bridge_hello_time; 108 unsigned long bridge_forward_delay; 109 110 u8 group_addr[ETH_ALEN]; 111 u16 root_port; 112 113 enum { 114 BR_NO_STP, /* no spanning tree */ 115 BR_KERNEL_STP, /* old STP in kernel */ 116 BR_USER_STP, /* new RSTP in userspace */ 117 } stp_enabled; 118 119 unsigned char topology_change; 120 unsigned char topology_change_detected; 121 122 struct timer_list hello_timer; 123 struct timer_list tcn_timer; 124 struct timer_list topology_change_timer; 125 struct timer_list gc_timer; 126 struct kobject *ifobj; 127 }; 128 129 extern struct notifier_block br_device_notifier; 130 extern const u8 br_group_address[ETH_ALEN]; 131 132 /* called under bridge lock */ 133 static inline int br_is_root_bridge(const struct net_bridge *br) 134 { 135 return !memcmp(&br->bridge_id, &br->designated_root, 8); 136 } 137 138 /* br_device.c */ 139 extern void br_dev_setup(struct net_device *dev); 140 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev); 141 142 /* br_fdb.c */ 143 extern int br_fdb_init(void); 144 extern void br_fdb_fini(void); 145 extern void br_fdb_flush(struct net_bridge *br); 146 extern void br_fdb_changeaddr(struct net_bridge_port *p, 147 const unsigned char *newaddr); 148 extern void br_fdb_cleanup(unsigned long arg); 149 extern void br_fdb_delete_by_port(struct net_bridge *br, 150 const struct net_bridge_port *p, int do_all); 151 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br, 152 const unsigned char *addr); 153 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br, 154 unsigned char *addr); 155 extern void br_fdb_put(struct net_bridge_fdb_entry *ent); 156 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 157 unsigned long count, unsigned long off); 158 extern int br_fdb_insert(struct net_bridge *br, 159 struct net_bridge_port *source, 160 const unsigned char *addr); 161 extern void br_fdb_update(struct net_bridge *br, 162 struct net_bridge_port *source, 163 const unsigned char *addr); 164 165 /* br_forward.c */ 166 extern void br_deliver(const struct net_bridge_port *to, 167 struct sk_buff *skb); 168 extern int br_dev_queue_push_xmit(struct sk_buff *skb); 169 extern void br_forward(const struct net_bridge_port *to, 170 struct sk_buff *skb); 171 extern int br_forward_finish(struct sk_buff *skb); 172 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb); 173 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb); 174 175 /* br_if.c */ 176 extern void br_port_carrier_check(struct net_bridge_port *p); 177 extern int br_add_bridge(const char *name); 178 extern int br_del_bridge(const char *name); 179 extern void br_cleanup_bridges(void); 180 extern int br_add_if(struct net_bridge *br, 181 struct net_device *dev); 182 extern int br_del_if(struct net_bridge *br, 183 struct net_device *dev); 184 extern int br_min_mtu(const struct net_bridge *br); 185 extern void br_features_recompute(struct net_bridge *br); 186 187 /* br_input.c */ 188 extern int br_handle_frame_finish(struct sk_buff *skb); 189 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p, 190 struct sk_buff *skb); 191 192 /* br_ioctl.c */ 193 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); 194 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg); 195 196 /* br_netfilter.c */ 197 #ifdef CONFIG_BRIDGE_NETFILTER 198 extern int br_netfilter_init(void); 199 extern void br_netfilter_fini(void); 200 #else 201 #define br_netfilter_init() (0) 202 #define br_netfilter_fini() do { } while(0) 203 #endif 204 205 /* br_stp.c */ 206 extern void br_log_state(const struct net_bridge_port *p); 207 extern struct net_bridge_port *br_get_port(struct net_bridge *br, 208 u16 port_no); 209 extern void br_init_port(struct net_bridge_port *p); 210 extern void br_become_designated_port(struct net_bridge_port *p); 211 212 /* br_stp_if.c */ 213 extern void br_stp_enable_bridge(struct net_bridge *br); 214 extern void br_stp_disable_bridge(struct net_bridge *br); 215 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val); 216 extern void br_stp_enable_port(struct net_bridge_port *p); 217 extern void br_stp_disable_port(struct net_bridge_port *p); 218 extern void br_stp_recalculate_bridge_id(struct net_bridge *br); 219 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a); 220 extern void br_stp_set_bridge_priority(struct net_bridge *br, 221 u16 newprio); 222 extern void br_stp_set_port_priority(struct net_bridge_port *p, 223 u8 newprio); 224 extern void br_stp_set_path_cost(struct net_bridge_port *p, 225 u32 path_cost); 226 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id); 227 228 /* br_stp_bpdu.c */ 229 struct stp_proto; 230 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb, 231 struct net_device *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