bridge: send correct MTU value in PMTU (revised)
[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 #include <net/route.h>
19
20 #define BR_HASH_BITS 8
21 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
22
23 #define BR_HOLD_TIME (1*HZ)
24
25 #define BR_PORT_BITS    10
26 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
27
28 #define BR_VERSION      "2.3"
29
30 /* Path to usermode spanning tree program */
31 #define BR_STP_PROG     "/sbin/bridge-stp"
32
33 typedef struct bridge_id bridge_id;
34 typedef struct mac_addr mac_addr;
35 typedef __u16 port_id;
36
37 struct bridge_id
38 {
39         unsigned char   prio[2];
40         unsigned char   addr[6];
41 };
42
43 struct mac_addr
44 {
45         unsigned char   addr[6];
46 };
47
48 struct net_bridge_fdb_entry
49 {
50         struct hlist_node               hlist;
51         struct net_bridge_port          *dst;
52
53         struct rcu_head                 rcu;
54         atomic_t                        use_count;
55         unsigned long                   ageing_timer;
56         mac_addr                        addr;
57         unsigned char                   is_local;
58         unsigned char                   is_static;
59 };
60
61 struct net_bridge_port
62 {
63         struct net_bridge               *br;
64         struct net_device               *dev;
65         struct list_head                list;
66
67         /* STP */
68         u8                              priority;
69         u8                              state;
70         u16                             port_no;
71         unsigned char                   topology_change_ack;
72         unsigned char                   config_pending;
73         port_id                         port_id;
74         port_id                         designated_port;
75         bridge_id                       designated_root;
76         bridge_id                       designated_bridge;
77         u32                             path_cost;
78         u32                             designated_cost;
79
80         struct timer_list               forward_delay_timer;
81         struct timer_list               hold_timer;
82         struct timer_list               message_age_timer;
83         struct kobject                  kobj;
84         struct rcu_head                 rcu;
85 };
86
87 struct net_bridge
88 {
89         spinlock_t                      lock;
90         struct list_head                port_list;
91         struct net_device               *dev;
92         spinlock_t                      hash_lock;
93         struct hlist_head               hash[BR_HASH_SIZE];
94         struct list_head                age_list;
95         unsigned long                   feature_mask;
96 #ifdef CONFIG_BRIDGE_NETFILTER
97         struct rtable                   fake_rtable;
98 #endif
99         unsigned long                   flags;
100 #define BR_SET_MAC_ADDR         0x00000001
101
102         /* STP */
103         bridge_id                       designated_root;
104         bridge_id                       bridge_id;
105         u32                             root_path_cost;
106         unsigned long                   max_age;
107         unsigned long                   hello_time;
108         unsigned long                   forward_delay;
109         unsigned long                   bridge_max_age;
110         unsigned long                   ageing_time;
111         unsigned long                   bridge_hello_time;
112         unsigned long                   bridge_forward_delay;
113
114         u8                              group_addr[ETH_ALEN];
115         u16                             root_port;
116
117         enum {
118                 BR_NO_STP,              /* no spanning tree */
119                 BR_KERNEL_STP,          /* old STP in kernel */
120                 BR_USER_STP,            /* new RSTP in userspace */
121         } stp_enabled;
122
123         unsigned char                   topology_change;
124         unsigned char                   topology_change_detected;
125
126         struct timer_list               hello_timer;
127         struct timer_list               tcn_timer;
128         struct timer_list               topology_change_timer;
129         struct timer_list               gc_timer;
130         struct kobject                  *ifobj;
131 };
132
133 extern struct notifier_block br_device_notifier;
134 extern const u8 br_group_address[ETH_ALEN];
135
136 /* called under bridge lock */
137 static inline int br_is_root_bridge(const struct net_bridge *br)
138 {
139         return !memcmp(&br->bridge_id, &br->designated_root, 8);
140 }
141
142 /* br_device.c */
143 extern void br_dev_setup(struct net_device *dev);
144 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
145
146 /* br_fdb.c */
147 extern int br_fdb_init(void);
148 extern void br_fdb_fini(void);
149 extern void br_fdb_flush(struct net_bridge *br);
150 extern void br_fdb_changeaddr(struct net_bridge_port *p,
151                               const unsigned char *newaddr);
152 extern void br_fdb_cleanup(unsigned long arg);
153 extern void br_fdb_delete_by_port(struct net_bridge *br,
154                                   const struct net_bridge_port *p, int do_all);
155 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
156                                                  const unsigned char *addr);
157 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
158                                                unsigned char *addr);
159 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
160 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
161                           unsigned long count, unsigned long off);
162 extern int br_fdb_insert(struct net_bridge *br,
163                          struct net_bridge_port *source,
164                          const unsigned char *addr);
165 extern void br_fdb_update(struct net_bridge *br,
166                           struct net_bridge_port *source,
167                           const unsigned char *addr);
168
169 /* br_forward.c */
170 extern void br_deliver(const struct net_bridge_port *to,
171                 struct sk_buff *skb);
172 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
173 extern void br_forward(const struct net_bridge_port *to,
174                 struct sk_buff *skb);
175 extern int br_forward_finish(struct sk_buff *skb);
176 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
177 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb);
178
179 /* br_if.c */
180 extern void br_port_carrier_check(struct net_bridge_port *p);
181 extern int br_add_bridge(const char *name);
182 extern int br_del_bridge(const char *name);
183 extern void br_cleanup_bridges(void);
184 extern int br_add_if(struct net_bridge *br,
185               struct net_device *dev);
186 extern int br_del_if(struct net_bridge *br,
187               struct net_device *dev);
188 extern int br_min_mtu(const struct net_bridge *br);
189 extern void br_features_recompute(struct net_bridge *br);
190
191 /* br_input.c */
192 extern int br_handle_frame_finish(struct sk_buff *skb);
193 extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
194                                        struct sk_buff *skb);
195
196 /* br_ioctl.c */
197 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
198 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
199
200 /* br_netfilter.c */
201 #ifdef CONFIG_BRIDGE_NETFILTER
202 extern int br_netfilter_init(void);
203 extern void br_netfilter_fini(void);
204 extern void br_netfilter_rtable_init(struct net_bridge *);
205 #else
206 #define br_netfilter_init()     (0)
207 #define br_netfilter_fini()     do { } while(0)
208 #define br_netfilter_rtable_init(x)
209 #endif
210
211 /* br_stp.c */
212 extern void br_log_state(const struct net_bridge_port *p);
213 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
214                                            u16 port_no);
215 extern void br_init_port(struct net_bridge_port *p);
216 extern void br_become_designated_port(struct net_bridge_port *p);
217
218 /* br_stp_if.c */
219 extern void br_stp_enable_bridge(struct net_bridge *br);
220 extern void br_stp_disable_bridge(struct net_bridge *br);
221 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
222 extern void br_stp_enable_port(struct net_bridge_port *p);
223 extern void br_stp_disable_port(struct net_bridge_port *p);
224 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
225 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
226 extern void br_stp_set_bridge_priority(struct net_bridge *br,
227                                        u16 newprio);
228 extern void br_stp_set_port_priority(struct net_bridge_port *p,
229                                      u8 newprio);
230 extern void br_stp_set_path_cost(struct net_bridge_port *p,
231                                  u32 path_cost);
232 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
233
234 /* br_stp_bpdu.c */
235 struct stp_proto;
236 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
237                        struct net_device *dev);
238
239 /* br_stp_timer.c */
240 extern void br_stp_timer_init(struct net_bridge *br);
241 extern void br_stp_port_timer_init(struct net_bridge_port *p);
242 extern unsigned long br_timer_value(const struct timer_list *timer);
243
244 /* br.c */
245 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
246                                                        unsigned char *addr);
247 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
248
249
250 /* br_netlink.c */
251 extern int br_netlink_init(void);
252 extern void br_netlink_fini(void);
253 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
254
255 #ifdef CONFIG_SYSFS
256 /* br_sysfs_if.c */
257 extern struct sysfs_ops brport_sysfs_ops;
258 extern int br_sysfs_addif(struct net_bridge_port *p);
259
260 /* br_sysfs_br.c */
261 extern int br_sysfs_addbr(struct net_device *dev);
262 extern void br_sysfs_delbr(struct net_device *dev);
263
264 #else
265
266 #define br_sysfs_addif(p)       (0)
267 #define br_sysfs_addbr(dev)     (0)
268 #define br_sysfs_delbr(dev)     do { } while(0)
269 #endif /* CONFIG_SYSFS */
270
271 #endif