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 <linux/netpoll.h>
19#include <linux/u64_stats_sync.h>
20#include <net/route.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_VERSION "2.3"
31
32/* Control of forwarding link local multicast */
33#define BR_GROUPFWD_DEFAULT 0
34/* Don't allow forwarding control protocols like STP and LLDP */
35#define BR_GROUPFWD_RESTRICTED 0x4007u
36
37/* Path to usermode spanning tree program */
38#define BR_STP_PROG "/sbin/bridge-stp"
39
40typedef struct bridge_id bridge_id;
41typedef struct mac_addr mac_addr;
42typedef __u16 port_id;
43
44struct bridge_id
45{
46 unsigned char prio[2];
47 unsigned char addr[6];
48};
49
50struct mac_addr
51{
52 unsigned char addr[6];
53};
54
55struct br_ip
56{
57 union {
58 __be32 ip4;
59#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
60 struct in6_addr ip6;
61#endif
62 } u;
63 __be16 proto;
64};
65
66struct net_bridge_fdb_entry
67{
68 struct hlist_node hlist;
69 struct net_bridge_port *dst;
70
71 struct rcu_head rcu;
72 unsigned long updated;
73 unsigned long used;
74 mac_addr addr;
75 unsigned char is_local;
76 unsigned char is_static;
77};
78
79struct net_bridge_port_group {
80 struct net_bridge_port *port;
81 struct net_bridge_port_group __rcu *next;
82 struct hlist_node mglist;
83 struct rcu_head rcu;
84 struct timer_list timer;
85 struct timer_list query_timer;
86 struct br_ip addr;
87 u32 queries_sent;
88};
89
90struct net_bridge_mdb_entry
91{
92 struct hlist_node hlist[2];
93 struct net_bridge *br;
94 struct net_bridge_port_group __rcu *ports;
95 struct rcu_head rcu;
96 struct timer_list timer;
97 struct timer_list query_timer;
98 struct br_ip addr;
99 bool mglist;
100 u32 queries_sent;
101};
102
103struct net_bridge_mdb_htable
104{
105 struct hlist_head *mhash;
106 struct rcu_head rcu;
107 struct net_bridge_mdb_htable *old;
108 u32 size;
109 u32 max;
110 u32 secret;
111 u32 ver;
112};
113
114struct net_bridge_port
115{
116 struct net_bridge *br;
117 struct net_device *dev;
118 struct list_head list;
119
120 /* STP */
121 u8 priority;
122 u8 state;
123 u16 port_no;
124 unsigned char topology_change_ack;
125 unsigned char config_pending;
126 port_id port_id;
127 port_id designated_port;
128 bridge_id designated_root;
129 bridge_id designated_bridge;
130 u32 path_cost;
131 u32 designated_cost;
132 unsigned long designated_age;
133
134 struct timer_list forward_delay_timer;
135 struct timer_list hold_timer;
136 struct timer_list message_age_timer;
137 struct kobject kobj;
138 struct rcu_head rcu;
139
140 unsigned long flags;
141#define BR_HAIRPIN_MODE 0x00000001
142
143#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
144 u32 multicast_startup_queries_sent;
145 unsigned char multicast_router;
146 struct timer_list multicast_router_timer;
147 struct timer_list multicast_query_timer;
148 struct hlist_head mglist;
149 struct hlist_node rlist;
150#endif
151
152#ifdef CONFIG_SYSFS
153 char sysfs_name[IFNAMSIZ];
154#endif
155
156#ifdef CONFIG_NET_POLL_CONTROLLER
157 struct netpoll *np;
158#endif
159};
160
161#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
162
163static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
164{
165 struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
166 return br_port_exists(dev) ? port : NULL;
167}
168
169static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
170{
171 return br_port_exists(dev) ?
172 rtnl_dereference(dev->rx_handler_data) : NULL;
173}
174
175struct br_cpu_netstats {
176 u64 rx_packets;
177 u64 rx_bytes;
178 u64 tx_packets;
179 u64 tx_bytes;
180 struct u64_stats_sync syncp;
181};
182
183struct net_bridge
184{
185 spinlock_t lock;
186 struct list_head port_list;
187 struct net_device *dev;
188
189 struct br_cpu_netstats __percpu *stats;
190 spinlock_t hash_lock;
191 struct hlist_head hash[BR_HASH_SIZE];
192#ifdef CONFIG_BRIDGE_NETFILTER
193 struct rtable fake_rtable;
194 bool nf_call_iptables;
195 bool nf_call_ip6tables;
196 bool nf_call_arptables;
197#endif
198 unsigned long flags;
199#define BR_SET_MAC_ADDR 0x00000001
200
201 u16 group_fwd_mask;
202
203 /* STP */
204 bridge_id designated_root;
205 bridge_id bridge_id;
206 u32 root_path_cost;
207 unsigned long max_age;
208 unsigned long hello_time;
209 unsigned long forward_delay;
210 unsigned long bridge_max_age;
211 unsigned long ageing_time;
212 unsigned long bridge_hello_time;
213 unsigned long bridge_forward_delay;
214
215 u8 group_addr[ETH_ALEN];
216 u16 root_port;
217
218 enum {
219 BR_NO_STP, /* no spanning tree */
220 BR_KERNEL_STP, /* old STP in kernel */
221 BR_USER_STP, /* new RSTP in userspace */
222 } stp_enabled;
223
224 unsigned char topology_change;
225 unsigned char topology_change_detected;
226
227#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
228 unsigned char multicast_router;
229
230 u8 multicast_disabled:1;
231
232 u32 hash_elasticity;
233 u32 hash_max;
234
235 u32 multicast_last_member_count;
236 u32 multicast_startup_queries_sent;
237 u32 multicast_startup_query_count;
238
239 unsigned long multicast_last_member_interval;
240 unsigned long multicast_membership_interval;
241 unsigned long multicast_querier_interval;
242 unsigned long multicast_query_interval;
243 unsigned long multicast_query_response_interval;
244 unsigned long multicast_startup_query_interval;
245
246 spinlock_t multicast_lock;
247 struct net_bridge_mdb_htable __rcu *mdb;
248 struct hlist_head router_list;
249
250 struct timer_list multicast_router_timer;
251 struct timer_list multicast_querier_timer;
252 struct timer_list multicast_query_timer;
253#endif
254
255 struct timer_list hello_timer;
256 struct timer_list tcn_timer;
257 struct timer_list topology_change_timer;
258 struct timer_list gc_timer;
259 struct kobject *ifobj;
260};
261
262struct br_input_skb_cb {
263 struct net_device *brdev;
264#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
265 int igmp;
266 int mrouters_only;
267#endif
268};
269
270#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
271
272#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
273# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
274#else
275# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
276#endif
277
278#define br_printk(level, br, format, args...) \
279 printk(level "%s: " format, (br)->dev->name, ##args)
280
281#define br_err(__br, format, args...) \
282 br_printk(KERN_ERR, __br, format, ##args)
283#define br_warn(__br, format, args...) \
284 br_printk(KERN_WARNING, __br, format, ##args)
285#define br_notice(__br, format, args...) \
286 br_printk(KERN_NOTICE, __br, format, ##args)
287#define br_info(__br, format, args...) \
288 br_printk(KERN_INFO, __br, format, ##args)
289
290#define br_debug(br, format, args...) \
291 pr_debug("%s: " format, (br)->dev->name, ##args)
292
293extern struct notifier_block br_device_notifier;
294extern const u8 br_group_address[ETH_ALEN];
295
296/* called under bridge lock */
297static inline int br_is_root_bridge(const struct net_bridge *br)
298{
299 return !memcmp(&br->bridge_id, &br->designated_root, 8);
300}
301
302/* br_device.c */
303extern void br_dev_setup(struct net_device *dev);
304extern void br_dev_delete(struct net_device *dev, struct list_head *list);
305extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
306 struct net_device *dev);
307#ifdef CONFIG_NET_POLL_CONTROLLER
308static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
309{
310 return br->dev->npinfo;
311}
312
313static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
314 struct sk_buff *skb)
315{
316 struct netpoll *np = p->np;
317
318 if (np)
319 netpoll_send_skb(np, skb);
320}
321
322extern int br_netpoll_enable(struct net_bridge_port *p);
323extern void br_netpoll_disable(struct net_bridge_port *p);
324#else
325static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
326{
327 return NULL;
328}
329
330static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
331 struct sk_buff *skb)
332{
333}
334
335static inline int br_netpoll_enable(struct net_bridge_port *p)
336{
337 return 0;
338}
339
340static inline void br_netpoll_disable(struct net_bridge_port *p)
341{
342}
343#endif
344
345/* br_fdb.c */
346extern int br_fdb_init(void);
347extern void br_fdb_fini(void);
348extern void br_fdb_flush(struct net_bridge *br);
349extern void br_fdb_changeaddr(struct net_bridge_port *p,
350 const unsigned char *newaddr);
351extern void br_fdb_cleanup(unsigned long arg);
352extern void br_fdb_delete_by_port(struct net_bridge *br,
353 const struct net_bridge_port *p, int do_all);
354extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
355 const unsigned char *addr);
356extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
357extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
358 unsigned long count, unsigned long off);
359extern int br_fdb_insert(struct net_bridge *br,
360 struct net_bridge_port *source,
361 const unsigned char *addr);
362extern void br_fdb_update(struct net_bridge *br,
363 struct net_bridge_port *source,
364 const unsigned char *addr);
365extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
366extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
367extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
368
369/* br_forward.c */
370extern void br_deliver(const struct net_bridge_port *to,
371 struct sk_buff *skb);
372extern int br_dev_queue_push_xmit(struct sk_buff *skb);
373extern void br_forward(const struct net_bridge_port *to,
374 struct sk_buff *skb, struct sk_buff *skb0);
375extern int br_forward_finish(struct sk_buff *skb);
376extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
377extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
378 struct sk_buff *skb2);
379
380/* br_if.c */
381extern void br_port_carrier_check(struct net_bridge_port *p);
382extern int br_add_bridge(struct net *net, const char *name);
383extern int br_del_bridge(struct net *net, const char *name);
384extern void br_net_exit(struct net *net);
385extern int br_add_if(struct net_bridge *br,
386 struct net_device *dev);
387extern int br_del_if(struct net_bridge *br,
388 struct net_device *dev);
389extern int br_min_mtu(const struct net_bridge *br);
390extern u32 br_features_recompute(struct net_bridge *br, u32 features);
391
392/* br_input.c */
393extern int br_handle_frame_finish(struct sk_buff *skb);
394extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
395
396/* br_ioctl.c */
397extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
398extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
399
400/* br_multicast.c */
401#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
402extern int br_multicast_rcv(struct net_bridge *br,
403 struct net_bridge_port *port,
404 struct sk_buff *skb);
405extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
406 struct sk_buff *skb);
407extern void br_multicast_add_port(struct net_bridge_port *port);
408extern void br_multicast_del_port(struct net_bridge_port *port);
409extern void br_multicast_enable_port(struct net_bridge_port *port);
410extern void br_multicast_disable_port(struct net_bridge_port *port);
411extern void br_multicast_init(struct net_bridge *br);
412extern void br_multicast_open(struct net_bridge *br);
413extern void br_multicast_stop(struct net_bridge *br);
414extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
415 struct sk_buff *skb);
416extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
417 struct sk_buff *skb, struct sk_buff *skb2);
418extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
419extern int br_multicast_set_port_router(struct net_bridge_port *p,
420 unsigned long val);
421extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
422extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
423
424static inline bool br_multicast_is_router(struct net_bridge *br)
425{
426 return br->multicast_router == 2 ||
427 (br->multicast_router == 1 &&
428 timer_pending(&br->multicast_router_timer));
429}
430#else
431static inline int br_multicast_rcv(struct net_bridge *br,
432 struct net_bridge_port *port,
433 struct sk_buff *skb)
434{
435 return 0;
436}
437
438static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
439 struct sk_buff *skb)
440{
441 return NULL;
442}
443
444static inline void br_multicast_add_port(struct net_bridge_port *port)
445{
446}
447
448static inline void br_multicast_del_port(struct net_bridge_port *port)
449{
450}
451
452static inline void br_multicast_enable_port(struct net_bridge_port *port)
453{
454}
455
456static inline void br_multicast_disable_port(struct net_bridge_port *port)
457{
458}
459
460static inline void br_multicast_init(struct net_bridge *br)
461{
462}
463
464static inline void br_multicast_open(struct net_bridge *br)
465{
466}
467
468static inline void br_multicast_stop(struct net_bridge *br)
469{
470}
471
472static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
473 struct sk_buff *skb)
474{
475}
476
477static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
478 struct sk_buff *skb,
479 struct sk_buff *skb2)
480{
481}
482static inline bool br_multicast_is_router(struct net_bridge *br)
483{
484 return 0;
485}
486#endif
487
488/* br_netfilter.c */
489#ifdef CONFIG_BRIDGE_NETFILTER
490extern int br_netfilter_init(void);
491extern void br_netfilter_fini(void);
492extern void br_netfilter_rtable_init(struct net_bridge *);
493#else
494#define br_netfilter_init() (0)
495#define br_netfilter_fini() do { } while(0)
496#define br_netfilter_rtable_init(x)
497#endif
498
499/* br_stp.c */
500extern void br_log_state(const struct net_bridge_port *p);
501extern struct net_bridge_port *br_get_port(struct net_bridge *br,
502 u16 port_no);
503extern void br_init_port(struct net_bridge_port *p);
504extern void br_become_designated_port(struct net_bridge_port *p);
505
506extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
507extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
508extern int br_set_max_age(struct net_bridge *br, unsigned long x);
509
510
511/* br_stp_if.c */
512extern void br_stp_enable_bridge(struct net_bridge *br);
513extern void br_stp_disable_bridge(struct net_bridge *br);
514extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
515extern void br_stp_enable_port(struct net_bridge_port *p);
516extern void br_stp_disable_port(struct net_bridge_port *p);
517extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
518extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
519extern void br_stp_set_bridge_priority(struct net_bridge *br,
520 u16 newprio);
521extern int br_stp_set_port_priority(struct net_bridge_port *p,
522 unsigned long newprio);
523extern int br_stp_set_path_cost(struct net_bridge_port *p,
524 unsigned long path_cost);
525extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
526
527/* br_stp_bpdu.c */
528struct stp_proto;
529extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
530 struct net_device *dev);
531
532/* br_stp_timer.c */
533extern void br_stp_timer_init(struct net_bridge *br);
534extern void br_stp_port_timer_init(struct net_bridge_port *p);
535extern unsigned long br_timer_value(const struct timer_list *timer);
536
537/* br.c */
538#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
539extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
540#endif
541
542/* br_netlink.c */
543extern int br_netlink_init(void);
544extern void br_netlink_fini(void);
545extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
546
547#ifdef CONFIG_SYSFS
548/* br_sysfs_if.c */
549extern const struct sysfs_ops brport_sysfs_ops;
550extern int br_sysfs_addif(struct net_bridge_port *p);
551extern int br_sysfs_renameif(struct net_bridge_port *p);
552
553/* br_sysfs_br.c */
554extern int br_sysfs_addbr(struct net_device *dev);
555extern void br_sysfs_delbr(struct net_device *dev);
556
557#else
558
559#define br_sysfs_addif(p) (0)
560#define br_sysfs_renameif(p) (0)
561#define br_sysfs_addbr(dev) (0)
562#define br_sysfs_delbr(dev) do { } while(0)
563#endif /* CONFIG_SYSFS */
564
565#endif