815ed38925b2d428c1713709d11c7b45bfe0ad6e
[linux-2.6.git] / net / bridge / br_private.h
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