[BRIDGE]: use kcalloc
[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  *      $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/miscdevice.h>
20 #include <linux/if_bridge.h>
21
22 #define BR_HASH_BITS 8
23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
24
25 #define BR_HOLD_TIME (1*HZ)
26
27 #define BR_PORT_BITS    10
28 #define BR_MAX_PORTS    (1<<BR_PORT_BITS)
29
30 #define BR_PORT_DEBOUNCE (HZ/10)
31
32 #define BR_VERSION      "2.1"
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 work_struct              carrier_check;
86         struct rcu_head                 rcu;
87 };
88
89 struct net_bridge
90 {
91         spinlock_t                      lock;
92         struct list_head                port_list;
93         struct net_device               *dev;
94         struct net_device_stats         statistics;
95         spinlock_t                      hash_lock;
96         struct hlist_head               hash[BR_HASH_SIZE];
97         struct list_head                age_list;
98         unsigned long                   feature_mask;
99
100         /* STP */
101         bridge_id                       designated_root;
102         bridge_id                       bridge_id;
103         u32                             root_path_cost;
104         unsigned long                   max_age;
105         unsigned long                   hello_time;
106         unsigned long                   forward_delay;
107         unsigned long                   bridge_max_age;
108         unsigned long                   ageing_time;
109         unsigned long                   bridge_hello_time;
110         unsigned long                   bridge_forward_delay;
111
112         u16                             root_port;
113         unsigned char                   stp_enabled;
114         unsigned char                   topology_change;
115         unsigned char                   topology_change_detected;
116
117         struct timer_list               hello_timer;
118         struct timer_list               tcn_timer;
119         struct timer_list               topology_change_timer;
120         struct timer_list               gc_timer;
121         struct kobject                  ifobj;
122 };
123
124 extern struct notifier_block br_device_notifier;
125 extern const unsigned char bridge_ula[6];
126
127 /* called under bridge lock */
128 static inline int br_is_root_bridge(const struct net_bridge *br)
129 {
130         return !memcmp(&br->bridge_id, &br->designated_root, 8);
131 }
132
133
134 /* br_device.c */
135 extern void br_dev_setup(struct net_device *dev);
136 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
137
138 /* br_fdb.c */
139 extern void br_fdb_init(void);
140 extern void br_fdb_fini(void);
141 extern void br_fdb_changeaddr(struct net_bridge_port *p,
142                               const unsigned char *newaddr);
143 extern void br_fdb_cleanup(unsigned long arg);
144 extern void br_fdb_delete_by_port(struct net_bridge *br,
145                            struct net_bridge_port *p);
146 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
147                                                  const unsigned char *addr);
148 extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
149                                                unsigned char *addr);
150 extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
151 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf, 
152                           unsigned long count, unsigned long off);
153 extern int br_fdb_insert(struct net_bridge *br,
154                          struct net_bridge_port *source,
155                          const unsigned char *addr);
156 extern void br_fdb_update(struct net_bridge *br,
157                           struct net_bridge_port *source,
158                           const unsigned char *addr);
159
160 /* br_forward.c */
161 extern void br_deliver(const struct net_bridge_port *to,
162                 struct sk_buff *skb);
163 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
164 extern void br_forward(const struct net_bridge_port *to,
165                 struct sk_buff *skb);
166 extern int br_forward_finish(struct sk_buff *skb);
167 extern void br_flood_deliver(struct net_bridge *br,
168                       struct sk_buff *skb,
169                       int clone);
170 extern void br_flood_forward(struct net_bridge *br,
171                       struct sk_buff *skb,
172                       int clone);
173
174 /* br_if.c */
175 extern int br_add_bridge(const char *name);
176 extern int br_del_bridge(const char *name);
177 extern void br_cleanup_bridges(void);
178 extern int br_add_if(struct net_bridge *br,
179               struct net_device *dev);
180 extern int br_del_if(struct net_bridge *br,
181               struct net_device *dev);
182 extern int br_min_mtu(const struct net_bridge *br);
183 extern void br_features_recompute(struct net_bridge *br);
184
185 /* br_input.c */
186 extern int br_handle_frame_finish(struct sk_buff *skb);
187 extern int br_handle_frame(struct net_bridge_port *p, struct sk_buff **pskb);
188
189 /* br_ioctl.c */
190 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
191 extern int br_ioctl_deviceless_stub(unsigned int cmd, void __user *arg);
192
193 /* br_netfilter.c */
194 extern int br_netfilter_init(void);
195 extern void br_netfilter_fini(void);
196
197 /* br_stp.c */
198 extern void br_log_state(const struct net_bridge_port *p);
199 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
200                                            u16 port_no);
201 extern void br_init_port(struct net_bridge_port *p);
202 extern void br_become_designated_port(struct net_bridge_port *p);
203
204 /* br_stp_if.c */
205 extern void br_stp_enable_bridge(struct net_bridge *br);
206 extern void br_stp_disable_bridge(struct net_bridge *br);
207 extern void br_stp_enable_port(struct net_bridge_port *p);
208 extern void br_stp_disable_port(struct net_bridge_port *p);
209 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
210 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
211 extern void br_stp_set_bridge_priority(struct net_bridge *br,
212                                        u16 newprio);
213 extern void br_stp_set_port_priority(struct net_bridge_port *p,
214                                      u8 newprio);
215 extern void br_stp_set_path_cost(struct net_bridge_port *p,
216                                  u32 path_cost);
217 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
218
219 /* br_stp_bpdu.c */
220 extern int br_stp_handle_bpdu(struct sk_buff *skb);
221
222 /* br_stp_timer.c */
223 extern void br_stp_timer_init(struct net_bridge *br);
224 extern void br_stp_port_timer_init(struct net_bridge_port *p);
225 extern unsigned long br_timer_value(const struct timer_list *timer);
226
227 /* br.c */
228 extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
229                                                        unsigned char *addr);
230 extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
231
232
233 #ifdef CONFIG_SYSFS
234 /* br_sysfs_if.c */
235 extern struct sysfs_ops brport_sysfs_ops;
236 extern int br_sysfs_addif(struct net_bridge_port *p);
237
238 /* br_sysfs_br.c */
239 extern int br_sysfs_addbr(struct net_device *dev);
240 extern void br_sysfs_delbr(struct net_device *dev);
241
242 #else
243
244 #define br_sysfs_addif(p)       (0)
245 #define br_sysfs_addbr(dev)     (0)
246 #define br_sysfs_delbr(dev)     do { } while(0)
247 #endif /* CONFIG_SYSFS */
248
249 #endif