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 unsigned long ageing_timer;
55 mac_addr addr;
56 unsigned char is_local;
57 unsigned char is_static;
58};
59
60struct 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
86struct 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
132extern struct notifier_block br_device_notifier;
133extern const u8 br_group_address[ETH_ALEN];
134
135/* called under bridge lock */
136static 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 */
142extern void br_dev_setup(struct net_device *dev);
143extern int br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
144
145/* br_fdb.c */
146extern int br_fdb_init(void);
147extern void br_fdb_fini(void);
148extern void br_fdb_flush(struct net_bridge *br);
149extern void br_fdb_changeaddr(struct net_bridge_port *p,
150 const unsigned char *newaddr);
151extern void br_fdb_cleanup(unsigned long arg);
152extern void br_fdb_delete_by_port(struct net_bridge *br,
153 const struct net_bridge_port *p, int do_all);
154extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
155 const unsigned char *addr);
156extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
157extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
158 unsigned long count, unsigned long off);
159extern int br_fdb_insert(struct net_bridge *br,
160 struct net_bridge_port *source,
161 const unsigned char *addr);
162extern void br_fdb_update(struct net_bridge *br,
163 struct net_bridge_port *source,
164 const unsigned char *addr);
165
166/* br_forward.c */
167extern void br_deliver(const struct net_bridge_port *to,
168 struct sk_buff *skb);
169extern int br_dev_queue_push_xmit(struct sk_buff *skb);
170extern void br_forward(const struct net_bridge_port *to,
171 struct sk_buff *skb);
172extern int br_forward_finish(struct sk_buff *skb);
173extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
174extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb);
175
176/* br_if.c */
177extern void br_port_carrier_check(struct net_bridge_port *p);
178extern int br_add_bridge(struct net *net, const char *name);
179extern int br_del_bridge(struct net *net, const char *name);
180extern void br_net_exit(struct net *net);
181extern int br_add_if(struct net_bridge *br,
182 struct net_device *dev);
183extern int br_del_if(struct net_bridge *br,
184 struct net_device *dev);
185extern int br_min_mtu(const struct net_bridge *br);
186extern void br_features_recompute(struct net_bridge *br);
187
188/* br_input.c */
189extern int br_handle_frame_finish(struct sk_buff *skb);
190extern struct sk_buff *br_handle_frame(struct net_bridge_port *p,
191 struct sk_buff *skb);
192
193/* br_ioctl.c */
194extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
195extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
196
197/* br_netfilter.c */
198#ifdef CONFIG_BRIDGE_NETFILTER
199extern int br_netfilter_init(void);
200extern void br_netfilter_fini(void);
201extern 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 */
209extern void br_log_state(const struct net_bridge_port *p);
210extern struct net_bridge_port *br_get_port(struct net_bridge *br,
211 u16 port_no);
212extern void br_init_port(struct net_bridge_port *p);
213extern void br_become_designated_port(struct net_bridge_port *p);
214
215/* br_stp_if.c */
216extern void br_stp_enable_bridge(struct net_bridge *br);
217extern void br_stp_disable_bridge(struct net_bridge *br);
218extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
219extern void br_stp_enable_port(struct net_bridge_port *p);
220extern void br_stp_disable_port(struct net_bridge_port *p);
221extern void br_stp_recalculate_bridge_id(struct net_bridge *br);
222extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
223extern void br_stp_set_bridge_priority(struct net_bridge *br,
224 u16 newprio);
225extern void br_stp_set_port_priority(struct net_bridge_port *p,
226 u8 newprio);
227extern void br_stp_set_path_cost(struct net_bridge_port *p,
228 u32 path_cost);
229extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
230
231/* br_stp_bpdu.c */
232struct stp_proto;
233extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
234 struct net_device *dev);
235
236/* br_stp_timer.c */
237extern void br_stp_timer_init(struct net_bridge *br);
238extern void br_stp_port_timer_init(struct net_bridge_port *p);
239extern 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)
243extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
244#endif
245
246/* br_netlink.c */
247extern int br_netlink_init(void);
248extern void br_netlink_fini(void);
249extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
250
251#ifdef CONFIG_SYSFS
252/* br_sysfs_if.c */
253extern struct sysfs_ops brport_sysfs_ops;
254extern int br_sysfs_addif(struct net_bridge_port *p);
255
256/* br_sysfs_br.c */
257extern int br_sysfs_addbr(struct net_device *dev);
258extern 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