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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;
66};
67
Vlad Yasevich243a2e62013-02-13 12:00:09 +000068struct net_port_vlans {
69 u16 port_idx;
70 union {
71 struct net_bridge_port *port;
72 struct net_bridge *br;
73 } parent;
74 struct rcu_head rcu;
75 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000076 u16 num_vlans;
Vlad Yasevich243a2e62013-02-13 12:00:09 +000077};
78
Linus Torvalds1da177e2005-04-16 15:20:36 -070079struct net_bridge_fdb_entry
80{
81 struct hlist_node hlist;
82 struct net_bridge_port *dst;
83
84 struct rcu_head rcu;
stephen hemminger7cd88612011-04-04 14:03:28 +000085 unsigned long updated;
86 unsigned long used;
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 mac_addr addr;
88 unsigned char is_local;
89 unsigned char is_static;
90};
91
Herbert Xueb1d1642010-02-27 19:41:45 +000092struct net_bridge_port_group {
93 struct net_bridge_port *port;
Eric Dumazete8051682010-11-15 06:38:10 +000094 struct net_bridge_port_group __rcu *next;
Herbert Xueb1d1642010-02-27 19:41:45 +000095 struct hlist_node mglist;
96 struct rcu_head rcu;
97 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +090098 struct br_ip addr;
Amerigo Wangccb1c312012-12-14 22:09:51 +000099 unsigned char state;
Herbert Xueb1d1642010-02-27 19:41:45 +0000100};
101
102struct net_bridge_mdb_entry
103{
104 struct hlist_node hlist[2];
Herbert Xueb1d1642010-02-27 19:41:45 +0000105 struct net_bridge *br;
Eric Dumazete8051682010-11-15 06:38:10 +0000106 struct net_bridge_port_group __rcu *ports;
Herbert Xueb1d1642010-02-27 19:41:45 +0000107 struct rcu_head rcu;
108 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +0900109 struct br_ip addr;
Herbert Xu8a870172011-02-12 01:05:42 -0800110 bool mglist;
Herbert Xueb1d1642010-02-27 19:41:45 +0000111};
112
113struct net_bridge_mdb_htable
114{
115 struct hlist_head *mhash;
116 struct rcu_head rcu;
117 struct net_bridge_mdb_htable *old;
118 u32 size;
119 u32 max;
120 u32 secret;
121 u32 ver;
122};
123
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124struct net_bridge_port
125{
126 struct net_bridge *br;
127 struct net_device *dev;
128 struct list_head list;
129
130 /* STP */
131 u8 priority;
132 u8 state;
133 u16 port_no;
134 unsigned char topology_change_ack;
135 unsigned char config_pending;
136 port_id port_id;
137 port_id designated_port;
138 bridge_id designated_root;
139 bridge_id designated_bridge;
140 u32 path_cost;
141 u32 designated_cost;
stephen hemminger0c031502011-07-22 07:47:06 +0000142 unsigned long designated_age;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143
144 struct timer_list forward_delay_timer;
145 struct timer_list hold_timer;
146 struct timer_list message_age_timer;
147 struct kobject kobj;
148 struct rcu_head rcu;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000149
150 unsigned long flags;
151#define BR_HAIRPIN_MODE 0x00000001
stephen hemmingera2e01a62012-11-13 07:53:07 +0000152#define BR_BPDU_GUARD 0x00000002
stephen hemminger1007dd12012-11-13 07:53:08 +0000153#define BR_ROOT_BLOCK 0x00000004
David S. Millerc2d3bab2012-12-05 16:24:45 -0500154#define BR_MULTICAST_FAST_LEAVE 0x00000008
Herbert Xueb1d1642010-02-27 19:41:45 +0000155
156#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
157 u32 multicast_startup_queries_sent;
158 unsigned char multicast_router;
159 struct timer_list multicast_router_timer;
160 struct timer_list multicast_query_timer;
161 struct hlist_head mglist;
162 struct hlist_node rlist;
163#endif
Simon Arlotte0f43752010-05-10 09:31:11 +0000164
165#ifdef CONFIG_SYSFS
166 char sysfs_name[IFNAMSIZ];
167#endif
Herbert Xu91d2c342010-06-10 16:12:50 +0000168
169#ifdef CONFIG_NET_POLL_CONTROLLER
170 struct netpoll *np;
171#endif
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000172#ifdef CONFIG_BRIDGE_VLAN_FILTERING
173 struct net_port_vlans __rcu *vlan_info;
174#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175};
176
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000177#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
178
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000179static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
180{
John Fastabend2469ffd2012-10-24 08:13:03 +0000181 struct net_bridge_port *port =
182 rcu_dereference_rtnl(dev->rx_handler_data);
183
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000184 return br_port_exists(dev) ? port : NULL;
185}
186
Eric Dumazetec1e5612010-11-15 06:38:14 +0000187static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000188{
Eric Dumazetec1e5612010-11-15 06:38:14 +0000189 return br_port_exists(dev) ?
190 rtnl_dereference(dev->rx_handler_data) : NULL;
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000191}
192
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700193struct br_cpu_netstats {
Eric Dumazet406818f2010-06-23 13:00:48 -0700194 u64 rx_packets;
195 u64 rx_bytes;
196 u64 tx_packets;
197 u64 tx_bytes;
198 struct u64_stats_sync syncp;
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700199};
200
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201struct net_bridge
202{
203 spinlock_t lock;
204 struct list_head port_list;
205 struct net_device *dev;
stephen hemminger14bb4782010-03-02 13:32:09 +0000206
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700207 struct br_cpu_netstats __percpu *stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208 spinlock_t hash_lock;
209 struct hlist_head hash[BR_HASH_SIZE];
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700210#ifdef CONFIG_BRIDGE_NETFILTER
211 struct rtable fake_rtable;
Patrick McHardy4df53d82010-07-02 09:32:57 +0200212 bool nf_call_iptables;
213 bool nf_call_ip6tables;
214 bool nf_call_arptables;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700215#endif
stephen hemminger515853c2011-10-03 18:14:46 +0000216 u16 group_fwd_mask;
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 /* STP */
219 bridge_id designated_root;
220 bridge_id bridge_id;
221 u32 root_path_cost;
222 unsigned long max_age;
223 unsigned long hello_time;
224 unsigned long forward_delay;
225 unsigned long bridge_max_age;
226 unsigned long ageing_time;
227 unsigned long bridge_hello_time;
228 unsigned long bridge_forward_delay;
229
Stephen Hemmingerfda93d92006-03-20 22:59:21 -0800230 u8 group_addr[ETH_ALEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 u16 root_port;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700232
233 enum {
234 BR_NO_STP, /* no spanning tree */
235 BR_KERNEL_STP, /* old STP in kernel */
236 BR_USER_STP, /* new RSTP in userspace */
237 } stp_enabled;
238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 unsigned char topology_change;
240 unsigned char topology_change_detected;
241
Herbert Xueb1d1642010-02-27 19:41:45 +0000242#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
243 unsigned char multicast_router;
244
245 u8 multicast_disabled:1;
Herbert Xuc5c23262012-04-13 02:37:42 +0000246 u8 multicast_querier:1;
Herbert Xueb1d1642010-02-27 19:41:45 +0000247
248 u32 hash_elasticity;
249 u32 hash_max;
250
251 u32 multicast_last_member_count;
252 u32 multicast_startup_queries_sent;
253 u32 multicast_startup_query_count;
254
255 unsigned long multicast_last_member_interval;
256 unsigned long multicast_membership_interval;
257 unsigned long multicast_querier_interval;
258 unsigned long multicast_query_interval;
259 unsigned long multicast_query_response_interval;
260 unsigned long multicast_startup_query_interval;
261
262 spinlock_t multicast_lock;
Eric Dumazete8051682010-11-15 06:38:10 +0000263 struct net_bridge_mdb_htable __rcu *mdb;
Herbert Xueb1d1642010-02-27 19:41:45 +0000264 struct hlist_head router_list;
Herbert Xueb1d1642010-02-27 19:41:45 +0000265
266 struct timer_list multicast_router_timer;
267 struct timer_list multicast_querier_timer;
268 struct timer_list multicast_query_timer;
269#endif
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 struct timer_list hello_timer;
272 struct timer_list tcn_timer;
273 struct timer_list topology_change_timer;
274 struct timer_list gc_timer;
Greg Kroah-Hartman43b98c42007-12-17 15:54:39 -0400275 struct kobject *ifobj;
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000276#ifdef CONFIG_BRIDGE_VLAN_FILTERING
277 u8 vlan_enabled;
278 struct net_port_vlans __rcu *vlan_info;
279#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280};
281
Herbert Xu68b7c892010-02-27 19:41:40 +0000282struct br_input_skb_cb {
283 struct net_device *brdev;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000284#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Herbert Xueb1d1642010-02-27 19:41:45 +0000285 int igmp;
286 int mrouters_only;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000287#endif
Herbert Xu68b7c892010-02-27 19:41:40 +0000288};
289
290#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
291
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000292#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
293# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
294#else
295# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
296#endif
297
stephen hemminger28a16c92010-05-10 09:31:09 +0000298#define br_printk(level, br, format, args...) \
299 printk(level "%s: " format, (br)->dev->name, ##args)
300
301#define br_err(__br, format, args...) \
302 br_printk(KERN_ERR, __br, format, ##args)
303#define br_warn(__br, format, args...) \
304 br_printk(KERN_WARNING, __br, format, ##args)
305#define br_notice(__br, format, args...) \
306 br_printk(KERN_NOTICE, __br, format, ##args)
307#define br_info(__br, format, args...) \
308 br_printk(KERN_INFO, __br, format, ##args)
309
310#define br_debug(br, format, args...) \
311 pr_debug("%s: " format, (br)->dev->name, ##args)
312
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313extern struct notifier_block br_device_notifier;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314
315/* called under bridge lock */
316static inline int br_is_root_bridge(const struct net_bridge *br)
317{
318 return !memcmp(&br->bridge_id, &br->designated_root, 8);
319}
320
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321/* br_device.c */
322extern void br_dev_setup(struct net_device *dev);
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000323extern void br_dev_delete(struct net_device *dev, struct list_head *list);
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000324extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
325 struct net_device *dev);
stephen hemmingercfb478d2010-05-10 09:31:08 +0000326#ifdef CONFIG_NET_POLL_CONTROLLER
Herbert Xu91d2c342010-06-10 16:12:50 +0000327static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
328{
329 return br->dev->npinfo;
330}
stephen hemmingercfb478d2010-05-10 09:31:08 +0000331
Herbert Xu91d2c342010-06-10 16:12:50 +0000332static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
333 struct sk_buff *skb)
334{
335 struct netpoll *np = p->np;
336
337 if (np)
338 netpoll_send_skb(np, skb);
339}
340
Amerigo Wang47be03a22012-08-10 01:24:37 +0000341extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
Herbert Xu91d2c342010-06-10 16:12:50 +0000342extern void br_netpoll_disable(struct net_bridge_port *p);
343#else
344static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
345{
346 return NULL;
347}
348
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,
375 const unsigned char *addr);
Michał Mirosławda678292009-06-05 05:35:28 +0000376extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900377extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 unsigned long count, unsigned long off);
379extern int br_fdb_insert(struct net_bridge *br,
380 struct net_bridge_port *source,
381 const unsigned char *addr);
382extern void br_fdb_update(struct net_bridge *br,
383 struct net_bridge_port *source,
384 const unsigned char *addr);
John Fastabend77162022012-04-15 06:43:56 +0000385
386extern int br_fdb_delete(struct ndmsg *ndm,
387 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000388 const unsigned char *addr);
stephen hemmingeredc7d572012-10-01 12:32:33 +0000389extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
John Fastabend77162022012-04-15 06:43:56 +0000390 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000391 const unsigned char *addr,
John Fastabend77162022012-04-15 06:43:56 +0000392 u16 nlh_flags);
393extern int br_fdb_dump(struct sk_buff *skb,
394 struct netlink_callback *cb,
395 struct net_device *dev,
396 int idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397
398/* br_forward.c */
399extern void br_deliver(const struct net_bridge_port *to,
400 struct sk_buff *skb);
401extern int br_dev_queue_push_xmit(struct sk_buff *skb);
402extern void br_forward(const struct net_bridge_port *to,
Michael Braun7f7708f2010-03-16 00:26:22 -0700403 struct sk_buff *skb, struct sk_buff *skb0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404extern int br_forward_finish(struct sk_buff *skb);
Herbert Xue081e1e2007-09-16 16:20:48 -0700405extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
Herbert Xub33084b2010-02-27 19:41:41 +0000406extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
407 struct sk_buff *skb2);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408
409/* br_if.c */
Stephen Hemminger269def72007-02-22 01:10:18 -0800410extern void br_port_carrier_check(struct net_bridge_port *p);
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700411extern int br_add_bridge(struct net *net, const char *name);
412extern int br_del_bridge(struct net *net, const char *name);
Alexey Dobriyan712d6952008-09-08 16:20:18 -0700413extern void br_net_exit(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700414extern int br_add_if(struct net_bridge *br,
415 struct net_device *dev);
416extern int br_del_if(struct net_bridge *br,
417 struct net_device *dev);
418extern int br_min_mtu(const struct net_bridge *br);
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000419extern netdev_features_t br_features_recompute(struct net_bridge *br,
420 netdev_features_t features);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421
422/* br_input.c */
423extern int br_handle_frame_finish(struct sk_buff *skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000424extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
426/* br_ioctl.c */
427extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700428extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Herbert Xueb1d1642010-02-27 19:41:45 +0000430/* br_multicast.c */
431#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Cong Wang2ce297f2012-12-10 02:15:35 +0000432extern unsigned int br_mdb_rehash_seq;
Herbert Xueb1d1642010-02-27 19:41:45 +0000433extern int br_multicast_rcv(struct net_bridge *br,
434 struct net_bridge_port *port,
435 struct sk_buff *skb);
436extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
437 struct sk_buff *skb);
438extern void br_multicast_add_port(struct net_bridge_port *port);
439extern void br_multicast_del_port(struct net_bridge_port *port);
440extern void br_multicast_enable_port(struct net_bridge_port *port);
441extern void br_multicast_disable_port(struct net_bridge_port *port);
442extern void br_multicast_init(struct net_bridge *br);
443extern void br_multicast_open(struct net_bridge *br);
444extern void br_multicast_stop(struct net_bridge *br);
Herbert Xu5cb5e942010-02-27 19:41:46 +0000445extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
446 struct sk_buff *skb);
447extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
448 struct sk_buff *skb, struct sk_buff *skb2);
Herbert Xu0909e112010-02-27 19:41:49 +0000449extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
450extern int br_multicast_set_port_router(struct net_bridge_port *p,
451 unsigned long val);
Herbert Xu561f1102010-02-27 19:41:50 +0000452extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
Herbert Xuc5c23262012-04-13 02:37:42 +0000453extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
Herbert Xub1951672010-02-27 19:41:51 +0000454extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
Cong Wangcfd56752012-12-11 22:23:08 +0000455extern struct net_bridge_mdb_entry *br_mdb_ip_get(
456 struct net_bridge_mdb_htable *mdb,
457 struct br_ip *dst);
458extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
459 struct net_bridge_port *port, struct br_ip *group);
460extern void br_multicast_free_pg(struct rcu_head *head);
461extern struct net_bridge_port_group *br_multicast_new_port_group(
462 struct net_bridge_port *port,
463 struct br_ip *group,
Amerigo Wangccb1c312012-12-14 22:09:51 +0000464 struct net_bridge_port_group *next,
465 unsigned char state);
Cong Wangee07c6e2012-12-07 00:04:48 +0000466extern void br_mdb_init(void);
Vlad Yasevich63233152012-12-19 09:13:48 +0000467extern void br_mdb_uninit(void);
Cong Wang37a393b2012-12-11 22:23:07 +0000468extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
469 struct br_ip *group, int type);
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000470
Cong Wangcfd56752012-12-11 22:23:08 +0000471#define mlock_dereference(X, br) \
472 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
473
474#if IS_ENABLED(CONFIG_IPV6)
475#include <net/addrconf.h>
476static inline int ipv6_is_transient_multicast(const struct in6_addr *addr)
477{
478 if (ipv6_addr_is_multicast(addr) && IPV6_ADDR_MC_FLAG_TRANSIENT(addr))
479 return 1;
480 return 0;
481}
482#endif
483
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000484static inline bool br_multicast_is_router(struct net_bridge *br)
485{
486 return br->multicast_router == 2 ||
487 (br->multicast_router == 1 &&
488 timer_pending(&br->multicast_router_timer));
489}
Herbert Xueb1d1642010-02-27 19:41:45 +0000490#else
491static inline int br_multicast_rcv(struct net_bridge *br,
492 struct net_bridge_port *port,
493 struct sk_buff *skb)
494{
495 return 0;
496}
497
498static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
499 struct sk_buff *skb)
500{
501 return NULL;
502}
503
504static inline void br_multicast_add_port(struct net_bridge_port *port)
505{
506}
507
508static inline void br_multicast_del_port(struct net_bridge_port *port)
509{
510}
511
512static inline void br_multicast_enable_port(struct net_bridge_port *port)
513{
514}
515
516static inline void br_multicast_disable_port(struct net_bridge_port *port)
517{
518}
519
520static inline void br_multicast_init(struct net_bridge *br)
521{
522}
523
524static inline void br_multicast_open(struct net_bridge *br)
525{
526}
527
528static inline void br_multicast_stop(struct net_bridge *br)
529{
530}
Herbert Xu5cb5e942010-02-27 19:41:46 +0000531
532static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
533 struct sk_buff *skb)
534{
535}
536
537static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
538 struct sk_buff *skb,
539 struct sk_buff *skb2)
540{
541}
Herbert Xueb1d1642010-02-27 19:41:45 +0000542static inline bool br_multicast_is_router(struct net_bridge *br)
543{
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000544 return 0;
Herbert Xueb1d1642010-02-27 19:41:45 +0000545}
Rami Rosenfdb184d2013-01-03 13:30:43 +0200546static inline void br_mdb_init(void)
547{
548}
549static inline void br_mdb_uninit(void)
550{
551}
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000552#endif
Herbert Xueb1d1642010-02-27 19:41:45 +0000553
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000554/* br_vlan.c */
555#ifdef CONFIG_BRIDGE_VLAN_FILTERING
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000556extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
557 struct sk_buff *skb);
Vlad Yasevich85f46c62013-02-13 12:00:11 +0000558extern bool br_allowed_egress(struct net_bridge *br,
559 const struct net_port_vlans *v,
560 const struct sk_buff *skb);
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000561extern int br_vlan_add(struct net_bridge *br, u16 vid);
562extern int br_vlan_delete(struct net_bridge *br, u16 vid);
563extern void br_vlan_flush(struct net_bridge *br);
564extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
565extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid);
566extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
567extern void nbp_vlan_flush(struct net_bridge_port *port);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000568
569static inline struct net_port_vlans *br_get_vlan_info(
570 const struct net_bridge *br)
571{
572 return rcu_dereference(br->vlan_info);
573}
574
575static inline struct net_port_vlans *nbp_get_vlan_info(
576 const struct net_bridge_port *p)
577{
578 return rcu_dereference(p->vlan_info);
579}
580
581/* Since bridge now depends on 8021Q module, but the time bridge sees the
582 * skb, the vlan tag will always be present if the frame was tagged.
583 */
584static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
585{
586 int err = 0;
587
588 if (vlan_tx_tag_present(skb))
589 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
590 else {
591 *vid = 0;
592 err = -EINVAL;
593 }
594
595 return err;
596}
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000597#else
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000598static inline bool br_allowed_ingress(struct net_bridge *br,
599 struct net_port_vlans *v,
600 struct sk_buff *skb)
601{
602 return true;
603}
604
Vlad Yasevich85f46c62013-02-13 12:00:11 +0000605static inline bool br_allowed_egress(struct net_bridge *br,
606 const struct net_port_vlans *v,
607 const struct sk_buff *skb)
608{
609 return true;
610}
611
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000612static inline int br_vlan_add(struct net_bridge *br, u16 vid)
613{
614 return -EOPNOTSUPP;
615}
616
617static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
618{
619 return -EOPNOTSUPP;
620}
621
622static inline void br_vlan_flush(struct net_bridge *br)
623{
624}
625
626static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid)
627{
628 return -EOPNOTSUPP;
629}
630
631static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
632{
633 return -EOPNOTSUPP;
634}
635
636static inline void nbp_vlan_flush(struct net_bridge_port *port)
637{
638}
639
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000640static inline struct net_port_vlans *br_get_vlan_info(
641 const struct net_bridge *br)
642{
643 return NULL;
644}
645static inline struct net_port_vlans *nbp_get_vlan_info(
646 const struct net_bridge_port *p)
647{
648 return NULL;
649}
650
651static inline u16 br_vlan_get_tag(const struct sk_buff *skb)
652{
653 return 0;
654}
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000655#endif
656
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657/* br_netfilter.c */
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700658#ifdef CONFIG_BRIDGE_NETFILTER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700659extern int br_netfilter_init(void);
660extern void br_netfilter_fini(void);
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700661extern void br_netfilter_rtable_init(struct net_bridge *);
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700662#else
663#define br_netfilter_init() (0)
664#define br_netfilter_fini() do { } while(0)
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700665#define br_netfilter_rtable_init(x)
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700666#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700667
668/* br_stp.c */
669extern void br_log_state(const struct net_bridge_port *p);
670extern struct net_bridge_port *br_get_port(struct net_bridge *br,
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900671 u16 port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672extern void br_init_port(struct net_bridge_port *p);
673extern void br_become_designated_port(struct net_bridge_port *p);
674
stephen hemminger14f98f22011-04-04 14:03:33 +0000675extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
676extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
677extern int br_set_max_age(struct net_bridge *br, unsigned long x);
678
679
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680/* br_stp_if.c */
681extern void br_stp_enable_bridge(struct net_bridge *br);
682extern void br_stp_disable_bridge(struct net_bridge *br);
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700683extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700684extern void br_stp_enable_port(struct net_bridge_port *p);
685extern void br_stp_disable_port(struct net_bridge_port *p);
stephen hemmingeredf947f2011-03-24 13:24:01 +0000686extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
Stephen Hemminger4505a3e2005-12-21 18:51:49 -0800687extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688extern void br_stp_set_bridge_priority(struct net_bridge *br,
689 u16 newprio);
stephen hemminger14f98f22011-04-04 14:03:33 +0000690extern int br_stp_set_port_priority(struct net_bridge_port *p,
691 unsigned long newprio);
692extern int br_stp_set_path_cost(struct net_bridge_port *p,
693 unsigned long path_cost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700694extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
695
696/* br_stp_bpdu.c */
Patrick McHardy7c85fbf2008-07-05 21:25:56 -0700697struct stp_proto;
698extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
699 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700700
701/* br_stp_timer.c */
702extern void br_stp_timer_init(struct net_bridge *br);
703extern void br_stp_port_timer_init(struct net_bridge_port *p);
704extern unsigned long br_timer_value(const struct timer_list *timer);
705
706/* br.c */
Igor Maraviće6373c42011-12-12 02:58:25 +0000707#if IS_ENABLED(CONFIG_ATM_LANE)
Michał Mirosławda678292009-06-05 05:35:28 +0000708extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
709#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700711/* br_netlink.c */
stephen hemminger149ddd82012-06-26 05:48:45 +0000712extern struct rtnl_link_ops br_link_ops;
Thomas Graf32fe21c2007-03-22 11:59:03 -0700713extern int br_netlink_init(void);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700714extern void br_netlink_fini(void);
715extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
John Fastabende5a55a82012-10-24 08:12:57 +0000716extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
Vlad Yasevich407af322013-02-13 12:00:12 +0000717extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
John Fastabende5a55a82012-10-24 08:12:57 +0000718extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000719 struct net_device *dev, u32 filter_mask);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700720
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721#ifdef CONFIG_SYSFS
722/* br_sysfs_if.c */
Emese Revfy52cf25d2010-01-19 02:58:23 +0100723extern const struct sysfs_ops brport_sysfs_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724extern int br_sysfs_addif(struct net_bridge_port *p);
Simon Arlotte0f43752010-05-10 09:31:11 +0000725extern int br_sysfs_renameif(struct net_bridge_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700726
727/* br_sysfs_br.c */
728extern int br_sysfs_addbr(struct net_device *dev);
729extern void br_sysfs_delbr(struct net_device *dev);
730
731#else
732
Lee Jones0cb2bbb2012-11-03 23:02:30 +0100733static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
734static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
735static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
736static inline void br_sysfs_delbr(struct net_device *dev) { return; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737#endif /* CONFIG_SYSFS */
738
739#endif