blob: d41283c57952104c57f0eb674e7c6294599b32dc [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * 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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#include <linux/if_bridge.h>
Herbert Xu91d2c342010-06-10 16:12:50 +000018#include <linux/netpoll.h>
Eric Dumazet406818f2010-06-23 13:00:48 -070019#include <linux/u64_stats_sync.h>
Simon Wunderlich4adf0af2008-07-30 16:27:55 -070020#include <net/route.h>
Vlad Yasevich243a2e62013-02-13 12:00:09 +000021#include <linux/if_vlan.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23#define BR_HASH_BITS 8
24#define BR_HASH_SIZE (1 << BR_HASH_BITS)
25
26#define BR_HOLD_TIME (1*HZ)
27
28#define BR_PORT_BITS 10
29#define BR_MAX_PORTS (1<<BR_PORT_BITS)
Vlad Yasevich243a2e62013-02-13 12:00:09 +000030#define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
Stephen Hemminger9cde0702007-03-21 14:22:44 -070032#define BR_VERSION "2.3"
33
stephen hemminger515853c2011-10-03 18:14:46 +000034/* Control of forwarding link local multicast */
35#define BR_GROUPFWD_DEFAULT 0
36/* Don't allow forwarding control protocols like STP and LLDP */
37#define BR_GROUPFWD_RESTRICTED 0x4007u
38
Stephen Hemminger9cde0702007-03-21 14:22:44 -070039/* Path to usermode spanning tree program */
40#define BR_STP_PROG "/sbin/bridge-stp"
Stephen Hemminger8cbb512e2005-12-21 19:01:30 -080041
Linus Torvalds1da177e2005-04-16 15:20:36 -070042typedef struct bridge_id bridge_id;
43typedef struct mac_addr mac_addr;
44typedef __u16 port_id;
45
46struct bridge_id
47{
48 unsigned char prio[2];
49 unsigned char addr[6];
50};
51
52struct mac_addr
53{
54 unsigned char addr[6];
55};
56
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +090057struct br_ip
58{
59 union {
60 __be32 ip4;
Eric Dumazetdfd56b82011-12-10 09:48:31 +000061#if IS_ENABLED(CONFIG_IPV6)
YOSHIFUJI Hideaki08b202b2010-04-23 01:54:22 +090062 struct in6_addr ip6;
63#endif
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +090064 } u;
65 __be16 proto;
Vlad Yasevichb0e9a302013-02-13 12:00:17 +000066 __u16 vid;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +090067};
68
Vlad Yasevich243a2e62013-02-13 12:00:09 +000069struct net_port_vlans {
70 u16 port_idx;
Vlad Yasevich78851982013-02-13 12:00:14 +000071 u16 pvid;
Vlad Yasevich243a2e62013-02-13 12:00:09 +000072 union {
73 struct net_bridge_port *port;
74 struct net_bridge *br;
75 } parent;
76 struct rcu_head rcu;
77 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
Vlad Yasevich35e03f32013-02-13 12:00:20 +000078 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000079 u16 num_vlans;
Vlad Yasevich243a2e62013-02-13 12:00:09 +000080};
81
Linus Torvalds1da177e2005-04-16 15:20:36 -070082struct net_bridge_fdb_entry
83{
84 struct hlist_node hlist;
85 struct net_bridge_port *dst;
86
87 struct rcu_head rcu;
stephen hemminger7cd88612011-04-04 14:03:28 +000088 unsigned long updated;
89 unsigned long used;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090 mac_addr addr;
91 unsigned char is_local;
92 unsigned char is_static;
Vlad Yasevich2ba071e2013-02-13 12:00:16 +000093 __u16 vlan_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070094};
95
Herbert Xueb1d1642010-02-27 19:41:45 +000096struct net_bridge_port_group {
97 struct net_bridge_port *port;
Eric Dumazete8051682010-11-15 06:38:10 +000098 struct net_bridge_port_group __rcu *next;
Herbert Xueb1d1642010-02-27 19:41:45 +000099 struct hlist_node mglist;
100 struct rcu_head rcu;
101 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +0900102 struct br_ip addr;
Amerigo Wangccb1c312012-12-14 22:09:51 +0000103 unsigned char state;
Herbert Xueb1d1642010-02-27 19:41:45 +0000104};
105
106struct net_bridge_mdb_entry
107{
108 struct hlist_node hlist[2];
Herbert Xueb1d1642010-02-27 19:41:45 +0000109 struct net_bridge *br;
Eric Dumazete8051682010-11-15 06:38:10 +0000110 struct net_bridge_port_group __rcu *ports;
Herbert Xueb1d1642010-02-27 19:41:45 +0000111 struct rcu_head rcu;
112 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +0900113 struct br_ip addr;
Herbert Xu8a870172011-02-12 01:05:42 -0800114 bool mglist;
Cong Wang9f00b2e2013-05-21 21:52:55 +0000115 bool timer_armed;
Herbert Xueb1d1642010-02-27 19:41:45 +0000116};
117
118struct net_bridge_mdb_htable
119{
120 struct hlist_head *mhash;
121 struct rcu_head rcu;
122 struct net_bridge_mdb_htable *old;
123 u32 size;
124 u32 max;
125 u32 secret;
126 u32 ver;
127};
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129struct net_bridge_port
130{
131 struct net_bridge *br;
132 struct net_device *dev;
133 struct list_head list;
134
135 /* STP */
136 u8 priority;
137 u8 state;
138 u16 port_no;
139 unsigned char topology_change_ack;
140 unsigned char config_pending;
141 port_id port_id;
142 port_id designated_port;
143 bridge_id designated_root;
144 bridge_id designated_bridge;
145 u32 path_cost;
146 u32 designated_cost;
stephen hemminger0c031502011-07-22 07:47:06 +0000147 unsigned long designated_age;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149 struct timer_list forward_delay_timer;
150 struct timer_list hold_timer;
151 struct timer_list message_age_timer;
152 struct kobject kobj;
153 struct rcu_head rcu;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000154
155 unsigned long flags;
156#define BR_HAIRPIN_MODE 0x00000001
stephen hemmingera2e01a62012-11-13 07:53:07 +0000157#define BR_BPDU_GUARD 0x00000002
stephen hemminger1007dd12012-11-13 07:53:08 +0000158#define BR_ROOT_BLOCK 0x00000004
David S. Millerc2d3bab2012-12-05 16:24:45 -0500159#define BR_MULTICAST_FAST_LEAVE 0x00000008
stephen hemminger8f3359b2013-04-13 14:06:07 +0000160#define BR_ADMIN_COST 0x00000010
Vlad Yasevich9ba18892013-06-05 10:08:00 -0400161#define BR_LEARNING 0x00000020
Vlad Yasevich867a5942013-06-05 10:08:01 -0400162#define BR_FLOOD 0x00000040
Herbert Xueb1d1642010-02-27 19:41:45 +0000163
164#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
165 u32 multicast_startup_queries_sent;
166 unsigned char multicast_router;
167 struct timer_list multicast_router_timer;
168 struct timer_list multicast_query_timer;
169 struct hlist_head mglist;
170 struct hlist_node rlist;
171#endif
Simon Arlotte0f43752010-05-10 09:31:11 +0000172
173#ifdef CONFIG_SYSFS
174 char sysfs_name[IFNAMSIZ];
175#endif
Herbert Xu91d2c342010-06-10 16:12:50 +0000176
177#ifdef CONFIG_NET_POLL_CONTROLLER
178 struct netpoll *np;
179#endif
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000180#ifdef CONFIG_BRIDGE_VLAN_FILTERING
181 struct net_port_vlans __rcu *vlan_info;
182#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183};
184
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000185#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
186
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000187static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
188{
John Fastabend2469ffd2012-10-24 08:13:03 +0000189 struct net_bridge_port *port =
190 rcu_dereference_rtnl(dev->rx_handler_data);
191
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000192 return br_port_exists(dev) ? port : NULL;
193}
194
Eric Dumazetec1e5612010-11-15 06:38:14 +0000195static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000196{
Eric Dumazetec1e5612010-11-15 06:38:14 +0000197 return br_port_exists(dev) ?
198 rtnl_dereference(dev->rx_handler_data) : NULL;
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000199}
200
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700201struct br_cpu_netstats {
Eric Dumazet406818f2010-06-23 13:00:48 -0700202 u64 rx_packets;
203 u64 rx_bytes;
204 u64 tx_packets;
205 u64 tx_bytes;
206 struct u64_stats_sync syncp;
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700207};
208
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209struct net_bridge
210{
211 spinlock_t lock;
212 struct list_head port_list;
213 struct net_device *dev;
stephen hemminger14bb4782010-03-02 13:32:09 +0000214
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700215 struct br_cpu_netstats __percpu *stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216 spinlock_t hash_lock;
217 struct hlist_head hash[BR_HASH_SIZE];
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700218#ifdef CONFIG_BRIDGE_NETFILTER
219 struct rtable fake_rtable;
Patrick McHardy4df53d82010-07-02 09:32:57 +0200220 bool nf_call_iptables;
221 bool nf_call_ip6tables;
222 bool nf_call_arptables;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700223#endif
stephen hemminger515853c2011-10-03 18:14:46 +0000224 u16 group_fwd_mask;
225
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226 /* STP */
227 bridge_id designated_root;
228 bridge_id bridge_id;
229 u32 root_path_cost;
230 unsigned long max_age;
231 unsigned long hello_time;
232 unsigned long forward_delay;
233 unsigned long bridge_max_age;
234 unsigned long ageing_time;
235 unsigned long bridge_hello_time;
236 unsigned long bridge_forward_delay;
237
Stephen Hemmingerfda93d92006-03-20 22:59:21 -0800238 u8 group_addr[ETH_ALEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 u16 root_port;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700240
241 enum {
242 BR_NO_STP, /* no spanning tree */
243 BR_KERNEL_STP, /* old STP in kernel */
244 BR_USER_STP, /* new RSTP in userspace */
245 } stp_enabled;
246
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 unsigned char topology_change;
248 unsigned char topology_change_detected;
249
Herbert Xueb1d1642010-02-27 19:41:45 +0000250#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
251 unsigned char multicast_router;
252
253 u8 multicast_disabled:1;
Herbert Xuc5c23262012-04-13 02:37:42 +0000254 u8 multicast_querier:1;
Cong Wang1c8ad5b2013-05-21 21:52:54 +0000255 u8 multicast_query_use_ifaddr:1;
Herbert Xueb1d1642010-02-27 19:41:45 +0000256
257 u32 hash_elasticity;
258 u32 hash_max;
259
260 u32 multicast_last_member_count;
261 u32 multicast_startup_queries_sent;
262 u32 multicast_startup_query_count;
263
264 unsigned long multicast_last_member_interval;
265 unsigned long multicast_membership_interval;
266 unsigned long multicast_querier_interval;
267 unsigned long multicast_query_interval;
268 unsigned long multicast_query_response_interval;
269 unsigned long multicast_startup_query_interval;
Linus Lüssingb00589a2013-08-01 01:06:20 +0200270 unsigned long multicast_querier_delay_time;
Herbert Xueb1d1642010-02-27 19:41:45 +0000271
272 spinlock_t multicast_lock;
Eric Dumazete8051682010-11-15 06:38:10 +0000273 struct net_bridge_mdb_htable __rcu *mdb;
Herbert Xueb1d1642010-02-27 19:41:45 +0000274 struct hlist_head router_list;
Herbert Xueb1d1642010-02-27 19:41:45 +0000275
276 struct timer_list multicast_router_timer;
277 struct timer_list multicast_querier_timer;
278 struct timer_list multicast_query_timer;
279#endif
280
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281 struct timer_list hello_timer;
282 struct timer_list tcn_timer;
283 struct timer_list topology_change_timer;
284 struct timer_list gc_timer;
Greg Kroah-Hartman43b98c42007-12-17 15:54:39 -0400285 struct kobject *ifobj;
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000286#ifdef CONFIG_BRIDGE_VLAN_FILTERING
287 u8 vlan_enabled;
288 struct net_port_vlans __rcu *vlan_info;
289#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290};
291
Herbert Xu68b7c892010-02-27 19:41:40 +0000292struct br_input_skb_cb {
293 struct net_device *brdev;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000294#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Herbert Xueb1d1642010-02-27 19:41:45 +0000295 int igmp;
296 int mrouters_only;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000297#endif
Herbert Xu68b7c892010-02-27 19:41:40 +0000298};
299
300#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
301
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000302#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
303# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
304#else
305# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
306#endif
307
stephen hemminger28a16c92010-05-10 09:31:09 +0000308#define br_printk(level, br, format, args...) \
309 printk(level "%s: " format, (br)->dev->name, ##args)
310
311#define br_err(__br, format, args...) \
312 br_printk(KERN_ERR, __br, format, ##args)
313#define br_warn(__br, format, args...) \
314 br_printk(KERN_WARNING, __br, format, ##args)
315#define br_notice(__br, format, args...) \
316 br_printk(KERN_NOTICE, __br, format, ##args)
317#define br_info(__br, format, args...) \
318 br_printk(KERN_INFO, __br, format, ##args)
319
320#define br_debug(br, format, args...) \
321 pr_debug("%s: " format, (br)->dev->name, ##args)
322
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323extern struct notifier_block br_device_notifier;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
325/* called under bridge lock */
326static inline int br_is_root_bridge(const struct net_bridge *br)
327{
328 return !memcmp(&br->bridge_id, &br->designated_root, 8);
329}
330
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331/* br_device.c */
332extern void br_dev_setup(struct net_device *dev);
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000333extern void br_dev_delete(struct net_device *dev, struct list_head *list);
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000334extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
335 struct net_device *dev);
stephen hemmingercfb478d2010-05-10 09:31:08 +0000336#ifdef CONFIG_NET_POLL_CONTROLLER
Herbert Xu91d2c342010-06-10 16:12:50 +0000337static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
338 struct sk_buff *skb)
339{
340 struct netpoll *np = p->np;
341
342 if (np)
343 netpoll_send_skb(np, skb);
344}
345
Amerigo Wang47be03a22012-08-10 01:24:37 +0000346extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
Herbert Xu91d2c342010-06-10 16:12:50 +0000347extern void br_netpoll_disable(struct net_bridge_port *p);
348#else
Herbert Xu9f70b0f2010-06-15 21:43:48 -0700349static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
Herbert Xu91d2c342010-06-10 16:12:50 +0000350 struct sk_buff *skb)
351{
352}
353
Amerigo Wang47be03a22012-08-10 01:24:37 +0000354static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
Herbert Xu91d2c342010-06-10 16:12:50 +0000355{
356 return 0;
357}
358
359static inline void br_netpoll_disable(struct net_bridge_port *p)
360{
361}
stephen hemmingercfb478d2010-05-10 09:31:08 +0000362#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700363
364/* br_fdb.c */
Akinobu Mita87a596e2007-04-07 18:57:07 +0900365extern int br_fdb_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366extern void br_fdb_fini(void);
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700367extern void br_fdb_flush(struct net_bridge *br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368extern void br_fdb_changeaddr(struct net_bridge_port *p,
369 const unsigned char *newaddr);
stephen hemminger43598812011-12-08 07:17:49 +0000370extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371extern void br_fdb_cleanup(unsigned long arg);
372extern void br_fdb_delete_by_port(struct net_bridge *br,
Stephen Hemminger1a620692006-10-12 14:45:38 -0700373 const struct net_bridge_port *p, int do_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
Vlad Yasevich2ba071e2013-02-13 12:00:16 +0000375 const unsigned char *addr,
376 __u16 vid);
Michał Mirosławda678292009-06-05 05:35:28 +0000377extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900378extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379 unsigned long count, unsigned long off);
380extern int br_fdb_insert(struct net_bridge *br,
381 struct net_bridge_port *source,
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000382 const unsigned char *addr,
383 u16 vid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384extern void br_fdb_update(struct net_bridge *br,
385 struct net_bridge_port *source,
Vlad Yasevich2ba071e2013-02-13 12:00:16 +0000386 const unsigned char *addr,
387 u16 vid);
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000388extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
John Fastabend77162022012-04-15 06:43:56 +0000389
Vlad Yasevich1690be62013-02-13 12:00:18 +0000390extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabend77162022012-04-15 06:43:56 +0000391 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000392 const unsigned char *addr);
stephen hemmingeredc7d572012-10-01 12:32:33 +0000393extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
John Fastabend77162022012-04-15 06:43:56 +0000394 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000395 const unsigned char *addr,
John Fastabend77162022012-04-15 06:43:56 +0000396 u16 nlh_flags);
397extern int br_fdb_dump(struct sk_buff *skb,
398 struct netlink_callback *cb,
399 struct net_device *dev,
400 int idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401
402/* br_forward.c */
403extern void br_deliver(const struct net_bridge_port *to,
404 struct sk_buff *skb);
405extern int br_dev_queue_push_xmit(struct sk_buff *skb);
406extern void br_forward(const struct net_bridge_port *to,
Michael Braun7f7708f2010-03-16 00:26:22 -0700407 struct sk_buff *skb, struct sk_buff *skb0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408extern int br_forward_finish(struct sk_buff *skb);
Vlad Yasevich867a5942013-06-05 10:08:01 -0400409extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb,
410 bool unicast);
Herbert Xub33084b2010-02-27 19:41:41 +0000411extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
Vlad Yasevich867a5942013-06-05 10:08:01 -0400412 struct sk_buff *skb2, bool unicast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
414/* br_if.c */
Stephen Hemminger269def72007-02-22 01:10:18 -0800415extern void br_port_carrier_check(struct net_bridge_port *p);
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700416extern int br_add_bridge(struct net *net, const char *name);
417extern int br_del_bridge(struct net *net, const char *name);
Alexey Dobriyan712d6952008-09-08 16:20:18 -0700418extern void br_net_exit(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419extern int br_add_if(struct net_bridge *br,
420 struct net_device *dev);
421extern int br_del_if(struct net_bridge *br,
422 struct net_device *dev);
423extern int br_min_mtu(const struct net_bridge *br);
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000424extern netdev_features_t br_features_recompute(struct net_bridge *br,
425 netdev_features_t features);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
427/* br_input.c */
428extern int br_handle_frame_finish(struct sk_buff *skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000429extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431/* br_ioctl.c */
432extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700433extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434
Herbert Xueb1d1642010-02-27 19:41:45 +0000435/* br_multicast.c */
436#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Cong Wang2ce297f2012-12-10 02:15:35 +0000437extern unsigned int br_mdb_rehash_seq;
Herbert Xueb1d1642010-02-27 19:41:45 +0000438extern int br_multicast_rcv(struct net_bridge *br,
439 struct net_bridge_port *port,
440 struct sk_buff *skb);
441extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
Cong Wangfbca58a2013-03-07 03:05:33 +0000442 struct sk_buff *skb, u16 vid);
Herbert Xueb1d1642010-02-27 19:41:45 +0000443extern void br_multicast_add_port(struct net_bridge_port *port);
444extern void br_multicast_del_port(struct net_bridge_port *port);
445extern void br_multicast_enable_port(struct net_bridge_port *port);
446extern void br_multicast_disable_port(struct net_bridge_port *port);
447extern void br_multicast_init(struct net_bridge *br);
448extern void br_multicast_open(struct net_bridge *br);
449extern void br_multicast_stop(struct net_bridge *br);
Herbert Xu5cb5e942010-02-27 19:41:46 +0000450extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
451 struct sk_buff *skb);
452extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
453 struct sk_buff *skb, struct sk_buff *skb2);
Herbert Xu0909e112010-02-27 19:41:49 +0000454extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
455extern int br_multicast_set_port_router(struct net_bridge_port *p,
456 unsigned long val);
Herbert Xu561f1102010-02-27 19:41:50 +0000457extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
Herbert Xuc5c23262012-04-13 02:37:42 +0000458extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
Herbert Xub1951672010-02-27 19:41:51 +0000459extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
Cong Wangcfd56752012-12-11 22:23:08 +0000460extern struct net_bridge_mdb_entry *br_mdb_ip_get(
461 struct net_bridge_mdb_htable *mdb,
462 struct br_ip *dst);
463extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
464 struct net_bridge_port *port, struct br_ip *group);
465extern void br_multicast_free_pg(struct rcu_head *head);
466extern struct net_bridge_port_group *br_multicast_new_port_group(
467 struct net_bridge_port *port,
468 struct br_ip *group,
stephen hemminger762a3d82013-08-04 17:19:38 -0700469 struct net_bridge_port_group __rcu *next,
Amerigo Wangccb1c312012-12-14 22:09:51 +0000470 unsigned char state);
Cong Wangee07c6e2012-12-07 00:04:48 +0000471extern void br_mdb_init(void);
Vlad Yasevich63233152012-12-19 09:13:48 +0000472extern void br_mdb_uninit(void);
Cong Wang37a393b2012-12-11 22:23:07 +0000473extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
474 struct br_ip *group, int type);
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000475
Cong Wangcfd56752012-12-11 22:23:08 +0000476#define mlock_dereference(X, br) \
477 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
478
479#if IS_ENABLED(CONFIG_IPV6)
480#include <net/addrconf.h>
481static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
482{
483 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
484 return 1;
485 return 0;
486}
487#endif
488
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000489static inline bool br_multicast_is_router(struct net_bridge *br)
490{
491 return br->multicast_router == 2 ||
492 (br->multicast_router == 1 &&
493 timer_pending(&br->multicast_router_timer));
494}
Linus Lüssingb00589a2013-08-01 01:06:20 +0200495
496static inline bool br_multicast_querier_exists(struct net_bridge *br)
497{
498 return time_is_before_jiffies(br->multicast_querier_delay_time) &&
499 (br->multicast_querier ||
500 timer_pending(&br->multicast_querier_timer));
501}
Herbert Xueb1d1642010-02-27 19:41:45 +0000502#else
503static inline int br_multicast_rcv(struct net_bridge *br,
504 struct net_bridge_port *port,
505 struct sk_buff *skb)
506{
507 return 0;
508}
509
510static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
Cong Wangfbca58a2013-03-07 03:05:33 +0000511 struct sk_buff *skb, u16 vid)
Herbert Xueb1d1642010-02-27 19:41:45 +0000512{
513 return NULL;
514}
515
516static inline void br_multicast_add_port(struct net_bridge_port *port)
517{
518}
519
520static inline void br_multicast_del_port(struct net_bridge_port *port)
521{
522}
523
524static inline void br_multicast_enable_port(struct net_bridge_port *port)
525{
526}
527
528static inline void br_multicast_disable_port(struct net_bridge_port *port)
529{
530}
531
532static inline void br_multicast_init(struct net_bridge *br)
533{
534}
535
536static inline void br_multicast_open(struct net_bridge *br)
537{
538}
539
540static inline void br_multicast_stop(struct net_bridge *br)
541{
542}
Herbert Xu5cb5e942010-02-27 19:41:46 +0000543
544static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
545 struct sk_buff *skb)
546{
547}
548
549static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
550 struct sk_buff *skb,
551 struct sk_buff *skb2)
552{
553}
Herbert Xueb1d1642010-02-27 19:41:45 +0000554static inline bool br_multicast_is_router(struct net_bridge *br)
555{
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000556 return 0;
Herbert Xueb1d1642010-02-27 19:41:45 +0000557}
Linus Lüssingb00589a2013-08-01 01:06:20 +0200558static inline bool br_multicast_querier_exists(struct net_bridge *br)
559{
560 return false;
561}
Rami Rosenfdb184d2013-01-03 13:30:43 +0200562static inline void br_mdb_init(void)
563{
564}
565static inline void br_mdb_uninit(void)
566{
567}
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000568#endif
Herbert Xueb1d1642010-02-27 19:41:45 +0000569
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000570/* br_vlan.c */
571#ifdef CONFIG_BRIDGE_VLAN_FILTERING
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000572extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
Vlad Yasevich78851982013-02-13 12:00:14 +0000573 struct sk_buff *skb, u16 *vid);
Vlad Yasevich85f46c62013-02-13 12:00:11 +0000574extern bool br_allowed_egress(struct net_bridge *br,
575 const struct net_port_vlans *v,
576 const struct sk_buff *skb);
Vlad Yasevich78851982013-02-13 12:00:14 +0000577extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
578 const struct net_port_vlans *v,
579 struct sk_buff *skb);
Vlad Yasevich552406c2013-02-13 12:00:15 +0000580extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000581extern int br_vlan_delete(struct net_bridge *br, u16 vid);
582extern void br_vlan_flush(struct net_bridge *br);
583extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
Vlad Yasevich552406c2013-02-13 12:00:15 +0000584extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000585extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
586extern void nbp_vlan_flush(struct net_bridge_port *port);
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000587extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000588
589static inline struct net_port_vlans *br_get_vlan_info(
590 const struct net_bridge *br)
591{
Vlad Yasevich1690be62013-02-13 12:00:18 +0000592 return rcu_dereference_rtnl(br->vlan_info);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000593}
594
595static inline struct net_port_vlans *nbp_get_vlan_info(
596 const struct net_bridge_port *p)
597{
Vlad Yasevich1690be62013-02-13 12:00:18 +0000598 return rcu_dereference_rtnl(p->vlan_info);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000599}
600
601/* Since bridge now depends on 8021Q module, but the time bridge sees the
602 * skb, the vlan tag will always be present if the frame was tagged.
603 */
604static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
605{
606 int err = 0;
607
608 if (vlan_tx_tag_present(skb))
609 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
610 else {
611 *vid = 0;
612 err = -EINVAL;
613 }
614
615 return err;
616}
Vlad Yasevich78851982013-02-13 12:00:14 +0000617
618static inline u16 br_get_pvid(const struct net_port_vlans *v)
619{
620 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
621 * vid wasn't set
622 */
623 smp_rmb();
624 return (v->pvid & VLAN_TAG_PRESENT) ?
625 (v->pvid & ~VLAN_TAG_PRESENT) :
626 VLAN_N_VID;
627}
628
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000629#else
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000630static inline bool br_allowed_ingress(struct net_bridge *br,
631 struct net_port_vlans *v,
Vlad Yasevich78851982013-02-13 12:00:14 +0000632 struct sk_buff *skb,
633 u16 *vid)
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000634{
635 return true;
636}
637
Vlad Yasevich85f46c62013-02-13 12:00:11 +0000638static inline bool br_allowed_egress(struct net_bridge *br,
639 const struct net_port_vlans *v,
640 const struct sk_buff *skb)
641{
642 return true;
643}
644
Vlad Yasevich78851982013-02-13 12:00:14 +0000645static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
646 const struct net_port_vlans *v,
647 struct sk_buff *skb)
648{
649 return skb;
650}
651
Vlad Yasevich552406c2013-02-13 12:00:15 +0000652static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000653{
654 return -EOPNOTSUPP;
655}
656
657static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
658{
659 return -EOPNOTSUPP;
660}
661
662static inline void br_vlan_flush(struct net_bridge *br)
663{
664}
665
Vlad Yasevich552406c2013-02-13 12:00:15 +0000666static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000667{
668 return -EOPNOTSUPP;
669}
670
671static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
672{
673 return -EOPNOTSUPP;
674}
675
676static inline void nbp_vlan_flush(struct net_bridge_port *port)
677{
678}
679
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000680static inline struct net_port_vlans *br_get_vlan_info(
681 const struct net_bridge *br)
682{
683 return NULL;
684}
685static inline struct net_port_vlans *nbp_get_vlan_info(
686 const struct net_bridge_port *p)
687{
688 return NULL;
689}
690
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000691static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
692{
693 return false;
694}
695
Vlad Yasevich78851982013-02-13 12:00:14 +0000696static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000697{
698 return 0;
699}
Vlad Yasevich78851982013-02-13 12:00:14 +0000700static inline u16 br_get_pvid(const struct net_port_vlans *v)
701{
702 return VLAN_N_VID; /* Returns invalid vid */
703}
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000704#endif
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706/* br_netfilter.c */
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700707#ifdef CONFIG_BRIDGE_NETFILTER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708extern int br_netfilter_init(void);
709extern void br_netfilter_fini(void);
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700710extern void br_netfilter_rtable_init(struct net_bridge *);
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700711#else
712#define br_netfilter_init() (0)
713#define br_netfilter_fini() do { } while(0)
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700714#define br_netfilter_rtable_init(x)
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700715#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716
717/* br_stp.c */
718extern void br_log_state(const struct net_bridge_port *p);
719extern struct net_bridge_port *br_get_port(struct net_bridge *br,
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900720 u16 port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721extern void br_init_port(struct net_bridge_port *p);
722extern void br_become_designated_port(struct net_bridge_port *p);
723
stephen hemminger14f98f22011-04-04 14:03:33 +0000724extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
725extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
726extern int br_set_max_age(struct net_bridge *br, unsigned long x);
727
728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729/* br_stp_if.c */
730extern void br_stp_enable_bridge(struct net_bridge *br);
731extern void br_stp_disable_bridge(struct net_bridge *br);
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700732extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733extern void br_stp_enable_port(struct net_bridge_port *p);
734extern void br_stp_disable_port(struct net_bridge_port *p);
stephen hemmingeredf947f2011-03-24 13:24:01 +0000735extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
Stephen Hemminger4505a3e2005-12-21 18:51:49 -0800736extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737extern void br_stp_set_bridge_priority(struct net_bridge *br,
738 u16 newprio);
stephen hemminger14f98f22011-04-04 14:03:33 +0000739extern int br_stp_set_port_priority(struct net_bridge_port *p,
740 unsigned long newprio);
741extern int br_stp_set_path_cost(struct net_bridge_port *p,
742 unsigned long path_cost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
744
745/* br_stp_bpdu.c */
Patrick McHardy7c85fbf2008-07-05 21:25:56 -0700746struct stp_proto;
747extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
748 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749
750/* br_stp_timer.c */
751extern void br_stp_timer_init(struct net_bridge *br);
752extern void br_stp_port_timer_init(struct net_bridge_port *p);
753extern unsigned long br_timer_value(const struct timer_list *timer);
754
755/* br.c */
Igor Maraviće6373c42011-12-12 02:58:25 +0000756#if IS_ENABLED(CONFIG_ATM_LANE)
Michał Mirosławda678292009-06-05 05:35:28 +0000757extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
758#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700760/* br_netlink.c */
stephen hemminger149ddd82012-06-26 05:48:45 +0000761extern struct rtnl_link_ops br_link_ops;
Thomas Graf32fe21c2007-03-22 11:59:03 -0700762extern int br_netlink_init(void);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700763extern void br_netlink_fini(void);
764extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
John Fastabende5a55a82012-10-24 08:12:57 +0000765extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
Vlad Yasevich407af322013-02-13 12:00:12 +0000766extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
John Fastabende5a55a82012-10-24 08:12:57 +0000767extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000768 struct net_device *dev, u32 filter_mask);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700769
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770#ifdef CONFIG_SYSFS
771/* br_sysfs_if.c */
Emese Revfy52cf25d2010-01-19 02:58:23 +0100772extern const struct sysfs_ops brport_sysfs_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773extern int br_sysfs_addif(struct net_bridge_port *p);
Simon Arlotte0f43752010-05-10 09:31:11 +0000774extern int br_sysfs_renameif(struct net_bridge_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
776/* br_sysfs_br.c */
777extern int br_sysfs_addbr(struct net_device *dev);
778extern void br_sysfs_delbr(struct net_device *dev);
779
780#else
781
Lee Jones0cb2bbb2012-11-03 23:02:30 +0100782static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
783static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
784static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
785static inline void br_sysfs_delbr(struct net_device *dev) { return; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786#endif /* CONFIG_SYSFS */
787
788#endif