net/bridge: use kobject_put to release kobject in br_add_if error path
[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         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 #ifdef CONFIG_BRIDGE_NETFILTER
96         struct rtable                   fake_rtable;
97 #endif
98         unsigned long                   flags;
99 #define BR_SET_MAC_ADDR         0x00000001
100
101         /* STP */
102         bridge_id                       designated_root;
103         bridge_id                       bridge_id;
104         u32                             root_path_cost;
105         unsigned long                   max_age;
106         unsigned long                   hello_time;
107         unsigned long                   forward_delay;
108         unsigned long                   bridge_max_age;
109         unsigned long                   ageing_time;
110         unsigned long                   bridge_hello_time;
111         unsigned long                   bridge_forward_delay;
112
113         u8                              group_addr[ETH_ALEN];
114         u16                             root_port;
115
116         enum {
117                 BR_NO_STP,              /* no spanning tree */
118                 BR_KERNEL_STP,          /* old STP in kernel */
119                 BR_USER_STP,            /* new RSTP in userspace */
120         } stp_enabled;
121
122         unsigned char                   topology_change;
123         unsigned char                   topology_change_detected;
124
125         struct timer_list               hello_timer;
126         struct timer_list               tcn_timer;
127         struct timer_list               topology_change_timer;
128         struct timer_list               gc_timer;
129         struct kobject                  *ifobj;
130 };
131
132 extern struct notifier_block br_device_notifier;
133 extern const u8 br_group_address[ETH_ALEN];
134
135 /* called under bridge lock */
136 static inline int br_is_root_bridge(const struct net_bridge *br)
137 {
138         return !memcmp(&br->bridge_id, &br->designated_root, 8);
139 }
140
141 /* br_device.c */
142 extern void br_dev_setup(struct net_device *dev);
143 extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
144
145 /* br_fdb.c */
146 extern int br_fdb_init(void);
147 extern void br_fdb_fini(void);
148 extern void br_fdb_flush(struct net_bridge *br);
149 extern void br_fdb_changeaddr(struct net_bridge_port *p,
150                               const unsigned char *newaddr);
151 extern void br_fdb_cleanup(unsigned long arg);
152 extern void br_fdb_delete_by_port(struct net_bridge *br,
153                                   const struct net_bridge_port *p, int do_all);
154 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
155                                                  const unsigned char *addr);
156 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
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(struct net *net, const char *name);
179 extern int br_del_bridge(struct net *net, const char *name);
180 extern void br_net_exit(struct net *net);
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 extern void br_netfilter_rtable_init(struct net_bridge *);
202 #else
203 #define br_netfilter_init()     (0)
204 #define br_netfilter_fini()     do { } while(0)
205 #define br_netfilter_rtable_init(x)
206 #endif
207
208 /* br_stp.c */
209 extern void br_log_state(const struct net_bridge_port *p);
210 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
211                                            u16 port_no);
212 extern void br_init_port(struct net_bridge_port *p);
213 extern void br_become_designated_port(struct net_bridge_port *p);
214
215 /* br_stp_if.c */
216 extern void br_stp_enable_bridge(struct net_bridge *br);
217 extern void br_stp_disable_bridge(struct net_bridge *br);
218 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
219 extern void br_stp_enable_port(struct net_bridge_port *p);
220 extern void br_stp_disable_port(struct net_bridge_port *p);
221 extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
222 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
223 extern void br_stp_set_bridge_priority(struct net_bridge *br,
224                                        u16 newprio);
225 extern void br_stp_set_port_priority(struct net_bridge_port *p,
226                                      u8 newprio);
227 extern void br_stp_set_path_cost(struct net_bridge_port *p,
228                                  u32 path_cost);
229 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
230
231 /* br_stp_bpdu.c */
232 struct stp_proto;
233 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
234                        struct net_device *dev);
235
236 /* br_stp_timer.c */
237 extern void br_stp_timer_init(struct net_bridge *br);
238 extern void br_stp_port_timer_init(struct net_bridge_port *p);
239 extern unsigned long br_timer_value(const struct timer_list *timer);
240
241 /* br.c */
242 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
243 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
244 #endif
245
246 /* br_netlink.c */
247 extern int br_netlink_init(void);
248 extern void br_netlink_fini(void);
249 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
250
251 #ifdef CONFIG_SYSFS
252 /* br_sysfs_if.c */
253 extern struct sysfs_ops brport_sysfs_ops;
254 extern int br_sysfs_addif(struct net_bridge_port *p);
255
256 /* br_sysfs_br.c */
257 extern int br_sysfs_addbr(struct net_device *dev);
258 extern void br_sysfs_delbr(struct net_device *dev);
259
260 #else
261
262 #define br_sysfs_addif(p)       (0)
263 #define br_sysfs_addbr(dev)     (0)
264 #define br_sysfs_delbr(dev)     do { } while(0)
265 #endif /* CONFIG_SYSFS */
266
267 #endif