tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
33typedef struct bridge_id bridge_id;
34typedef struct mac_addr mac_addr;
35typedef __u16 port_id;
36
37struct bridge_id
38{
39 unsigned char prio[2];
40 unsigned char addr[6];
41};
42
43struct mac_addr
44{
45 unsigned char addr[6];
46};
47
48struct 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
61struct 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
87struct 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
133extern struct notifier_block br_device_notifier;
134extern const u8 br_group_address[ETH_ALEN];
135
136/* called under bridge lock */
137static 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 */
143extern void br_dev_setup(struct net_device *dev);
144extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
145
146/* br_fdb.c */
147extern int br_fdb_init(void);
148extern void br_fdb_fini(void);
149extern void br_fdb_flush(struct net_bridge *br);
150extern void br_fdb_changeaddr(struct net_bridge_port *p,
151 const unsigned char *newaddr);
152extern void br_fdb_cleanup(unsigned long arg);
153extern void br_fdb_delete_by_port(struct net_bridge *br,
154 const struct net_bridge_port *p, int do_all);
155extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
156 const unsigned char *addr);
157extern struct net_bridge_fdb_entry *br_fdb_get(struct net_bridge *br,
158 unsigned char *addr);
159extern void br_fdb_put(struct net_bridge_fdb_entry *ent);
160extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
161 unsigned long count, unsigned long off);
162extern int br_fdb_insert(struct net_bridge *br,
163 struct net_bridge_port *source,
164 const unsigned char *addr);
165extern void br_fdb_update(struct net_bridge *br,
166 struct net_bridge_port *source,
167 const unsigned char *addr);
168
169/* br_forward.c */
170extern void br_deliver(const struct net_bridge_port *to,
171 struct sk_buff *skb);
172extern int br_dev_queue_push_xmit(struct sk_buff *skb);
173extern void br_forward(const struct net_bridge_port *to,
174 struct sk_buff *skb);
175extern int br_forward_finish(struct sk_buff *skb);
176extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
177extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb);
178
179/* br_if.c */
180extern void br_port_carrier_check(struct net_bridge_port *p);
181extern int br_add_bridge(const char *name);
182extern int br_del_bridge(const char *name);
183extern void br_cleanup_bridges(void);
184extern int br_add_if(struct net_bridge *br,
185 struct net_device *dev);
186extern int br_del_if(struct net_bridge *br,
187 struct net_device *dev);
188extern int br_min_mtu(const struct net_bridge *br);
189extern void br_features_recompute(struct net_bridge *br);
190
191/* br_input.c */
192extern int br_handle_frame_finish(struct sk_buff *skb);
193extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
194 struct sk_buff *skb);
195
196/* br_ioctl.c */
197extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
198extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
199
200/* br_netfilter.c */
201#ifdef CONFIG_BRIDGE_NETFILTER
202extern int br_netfilter_init(void);
203extern void br_netfilter_fini(void);
204extern 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 */
212extern void br_log_state(const struct net_bridge_port *p);
213extern struct net_bridge_port *br_get_port(struct net_bridge *br,
214 u16 port_no);
215extern void br_init_port(struct net_bridge_port *p);
216extern void br_become_designated_port(struct net_bridge_port *p);
217
218/* br_stp_if.c */
219extern void br_stp_enable_bridge(struct net_bridge *br);
220extern void br_stp_disable_bridge(struct net_bridge *br);
221extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
222extern void br_stp_enable_port(struct net_bridge_port *p);
223extern void br_stp_disable_port(struct net_bridge_port *p);
224extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
225extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
226extern void br_stp_set_bridge_priority(struct net_bridge *br,
227 u16 newprio);
228extern void br_stp_set_port_priority(struct net_bridge_port *p,
229 u8 newprio);
230extern void br_stp_set_path_cost(struct net_bridge_port *p,
231 u32 path_cost);
232extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
233
234/* br_stp_bpdu.c */
235struct stp_proto;
236extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
237 struct net_device *dev);
238
239/* br_stp_timer.c */
240extern void br_stp_timer_init(struct net_bridge *br);
241extern void br_stp_port_timer_init(struct net_bridge_port *p);
242extern unsigned long br_timer_value(const struct timer_list *timer);
243
244/* br.c */
245extern struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br,
246 unsigned char *addr);
247extern void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent);
248
249
250/* br_netlink.c */
251extern int br_netlink_init(void);
252extern void br_netlink_fini(void);
253extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
254
255#ifdef CONFIG_SYSFS
256/* br_sysfs_if.c */
257extern struct sysfs_ops brport_sysfs_ops;
258extern int br_sysfs_addif(struct net_bridge_port *p);
259
260/* br_sysfs_br.c */
261extern int br_sysfs_addbr(struct net_device *dev);
262extern 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