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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;
Vlad Yasevichb0e9a302013-02-13 12:00:17 +000066 __u16 vid;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +090067};
68
Linus Lüssingcc0fdd82013-08-30 17:28:17 +020069#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
70/* our own querier */
71struct bridge_mcast_query {
72 struct timer_list timer;
73 u32 startup_sent;
74};
75
76/* other querier */
77struct bridge_mcast_querier {
78 struct timer_list timer;
79 unsigned long delay_time;
80};
81#endif
82
Vlad Yasevich243a2e62013-02-13 12:00:09 +000083struct net_port_vlans {
84 u16 port_idx;
Vlad Yasevich78851982013-02-13 12:00:14 +000085 u16 pvid;
Vlad Yasevich243a2e62013-02-13 12:00:09 +000086 union {
87 struct net_bridge_port *port;
88 struct net_bridge *br;
89 } parent;
90 struct rcu_head rcu;
91 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
Vlad Yasevich35e03f32013-02-13 12:00:20 +000092 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000093 u16 num_vlans;
Vlad Yasevich243a2e62013-02-13 12:00:09 +000094};
95
Linus Torvalds1da177e2005-04-16 15:20:36 -070096struct net_bridge_fdb_entry
97{
98 struct hlist_node hlist;
99 struct net_bridge_port *dst;
100
101 struct rcu_head rcu;
stephen hemminger7cd88612011-04-04 14:03:28 +0000102 unsigned long updated;
103 unsigned long used;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 mac_addr addr;
105 unsigned char is_local;
106 unsigned char is_static;
Vlad Yasevich2ba071e2013-02-13 12:00:16 +0000107 __u16 vlan_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108};
109
Herbert Xueb1d1642010-02-27 19:41:45 +0000110struct net_bridge_port_group {
111 struct net_bridge_port *port;
Eric Dumazete8051682010-11-15 06:38:10 +0000112 struct net_bridge_port_group __rcu *next;
Herbert Xueb1d1642010-02-27 19:41:45 +0000113 struct hlist_node mglist;
114 struct rcu_head rcu;
115 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +0900116 struct br_ip addr;
Amerigo Wangccb1c312012-12-14 22:09:51 +0000117 unsigned char state;
Herbert Xueb1d1642010-02-27 19:41:45 +0000118};
119
120struct net_bridge_mdb_entry
121{
122 struct hlist_node hlist[2];
Herbert Xueb1d1642010-02-27 19:41:45 +0000123 struct net_bridge *br;
Eric Dumazete8051682010-11-15 06:38:10 +0000124 struct net_bridge_port_group __rcu *ports;
Herbert Xueb1d1642010-02-27 19:41:45 +0000125 struct rcu_head rcu;
126 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +0900127 struct br_ip addr;
Herbert Xu8a870172011-02-12 01:05:42 -0800128 bool mglist;
Cong Wang9f00b2e2013-05-21 21:52:55 +0000129 bool timer_armed;
Herbert Xueb1d1642010-02-27 19:41:45 +0000130};
131
132struct net_bridge_mdb_htable
133{
134 struct hlist_head *mhash;
135 struct rcu_head rcu;
136 struct net_bridge_mdb_htable *old;
137 u32 size;
138 u32 max;
139 u32 secret;
140 u32 ver;
141};
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143struct net_bridge_port
144{
145 struct net_bridge *br;
146 struct net_device *dev;
147 struct list_head list;
148
149 /* STP */
150 u8 priority;
151 u8 state;
152 u16 port_no;
153 unsigned char topology_change_ack;
154 unsigned char config_pending;
155 port_id port_id;
156 port_id designated_port;
157 bridge_id designated_root;
158 bridge_id designated_bridge;
159 u32 path_cost;
160 u32 designated_cost;
stephen hemminger0c031502011-07-22 07:47:06 +0000161 unsigned long designated_age;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 struct timer_list forward_delay_timer;
164 struct timer_list hold_timer;
165 struct timer_list message_age_timer;
166 struct kobject kobj;
167 struct rcu_head rcu;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000168
169 unsigned long flags;
170#define BR_HAIRPIN_MODE 0x00000001
stephen hemmingera2e01a62012-11-13 07:53:07 +0000171#define BR_BPDU_GUARD 0x00000002
stephen hemminger1007dd12012-11-13 07:53:08 +0000172#define BR_ROOT_BLOCK 0x00000004
David S. Millerc2d3bab2012-12-05 16:24:45 -0500173#define BR_MULTICAST_FAST_LEAVE 0x00000008
stephen hemminger8f3359b2013-04-13 14:06:07 +0000174#define BR_ADMIN_COST 0x00000010
Vlad Yasevich9ba18892013-06-05 10:08:00 -0400175#define BR_LEARNING 0x00000020
Vlad Yasevich867a5942013-06-05 10:08:01 -0400176#define BR_FLOOD 0x00000040
Herbert Xueb1d1642010-02-27 19:41:45 +0000177
178#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200179 struct bridge_mcast_query ip4_query;
180#if IS_ENABLED(CONFIG_IPV6)
181 struct bridge_mcast_query ip6_query;
182#endif /* IS_ENABLED(CONFIG_IPV6) */
Herbert Xueb1d1642010-02-27 19:41:45 +0000183 unsigned char multicast_router;
184 struct timer_list multicast_router_timer;
Herbert Xueb1d1642010-02-27 19:41:45 +0000185 struct hlist_head mglist;
186 struct hlist_node rlist;
187#endif
Simon Arlotte0f43752010-05-10 09:31:11 +0000188
189#ifdef CONFIG_SYSFS
190 char sysfs_name[IFNAMSIZ];
191#endif
Herbert Xu91d2c342010-06-10 16:12:50 +0000192
193#ifdef CONFIG_NET_POLL_CONTROLLER
194 struct netpoll *np;
195#endif
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000196#ifdef CONFIG_BRIDGE_VLAN_FILTERING
197 struct net_port_vlans __rcu *vlan_info;
198#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199};
200
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000201#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
202
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000203static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
204{
Hong Zhiguo716ec052013-09-14 22:42:28 +0800205 return rcu_dereference(dev->rx_handler_data);
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000206}
207
Hong Zhiguo1fb17542013-09-14 22:42:27 +0800208static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000209{
Eric Dumazetec1e5612010-11-15 06:38:14 +0000210 return br_port_exists(dev) ?
211 rtnl_dereference(dev->rx_handler_data) : NULL;
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000212}
213
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700214struct br_cpu_netstats {
Eric Dumazet406818f2010-06-23 13:00:48 -0700215 u64 rx_packets;
216 u64 rx_bytes;
217 u64 tx_packets;
218 u64 tx_bytes;
219 struct u64_stats_sync syncp;
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700220};
221
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222struct net_bridge
223{
224 spinlock_t lock;
225 struct list_head port_list;
226 struct net_device *dev;
stephen hemminger14bb4782010-03-02 13:32:09 +0000227
Eric Dumazet0eae88f2010-04-20 19:06:52 -0700228 struct br_cpu_netstats __percpu *stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 spinlock_t hash_lock;
230 struct hlist_head hash[BR_HASH_SIZE];
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700231#ifdef CONFIG_BRIDGE_NETFILTER
232 struct rtable fake_rtable;
Patrick McHardy4df53d82010-07-02 09:32:57 +0200233 bool nf_call_iptables;
234 bool nf_call_ip6tables;
235 bool nf_call_arptables;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700236#endif
stephen hemminger515853c2011-10-03 18:14:46 +0000237 u16 group_fwd_mask;
238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 /* STP */
240 bridge_id designated_root;
241 bridge_id bridge_id;
242 u32 root_path_cost;
243 unsigned long max_age;
244 unsigned long hello_time;
245 unsigned long forward_delay;
246 unsigned long bridge_max_age;
247 unsigned long ageing_time;
248 unsigned long bridge_hello_time;
249 unsigned long bridge_forward_delay;
250
Stephen Hemmingerfda93d92006-03-20 22:59:21 -0800251 u8 group_addr[ETH_ALEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 u16 root_port;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700253
254 enum {
255 BR_NO_STP, /* no spanning tree */
256 BR_KERNEL_STP, /* old STP in kernel */
257 BR_USER_STP, /* new RSTP in userspace */
258 } stp_enabled;
259
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 unsigned char topology_change;
261 unsigned char topology_change_detected;
262
Herbert Xueb1d1642010-02-27 19:41:45 +0000263#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
264 unsigned char multicast_router;
265
266 u8 multicast_disabled:1;
Herbert Xuc5c23262012-04-13 02:37:42 +0000267 u8 multicast_querier:1;
Cong Wang1c8ad5b2013-05-21 21:52:54 +0000268 u8 multicast_query_use_ifaddr:1;
Herbert Xueb1d1642010-02-27 19:41:45 +0000269
270 u32 hash_elasticity;
271 u32 hash_max;
272
273 u32 multicast_last_member_count;
Herbert Xueb1d1642010-02-27 19:41:45 +0000274 u32 multicast_startup_query_count;
275
276 unsigned long multicast_last_member_interval;
277 unsigned long multicast_membership_interval;
278 unsigned long multicast_querier_interval;
279 unsigned long multicast_query_interval;
280 unsigned long multicast_query_response_interval;
281 unsigned long multicast_startup_query_interval;
282
283 spinlock_t multicast_lock;
Eric Dumazete8051682010-11-15 06:38:10 +0000284 struct net_bridge_mdb_htable __rcu *mdb;
Herbert Xueb1d1642010-02-27 19:41:45 +0000285 struct hlist_head router_list;
Herbert Xueb1d1642010-02-27 19:41:45 +0000286
287 struct timer_list multicast_router_timer;
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200288 struct bridge_mcast_querier ip4_querier;
289 struct bridge_mcast_query ip4_query;
290#if IS_ENABLED(CONFIG_IPV6)
291 struct bridge_mcast_querier ip6_querier;
292 struct bridge_mcast_query ip6_query;
293#endif /* IS_ENABLED(CONFIG_IPV6) */
Herbert Xueb1d1642010-02-27 19:41:45 +0000294#endif
295
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 struct timer_list hello_timer;
297 struct timer_list tcn_timer;
298 struct timer_list topology_change_timer;
299 struct timer_list gc_timer;
Greg Kroah-Hartman43b98c42007-12-17 15:54:39 -0400300 struct kobject *ifobj;
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000301#ifdef CONFIG_BRIDGE_VLAN_FILTERING
302 u8 vlan_enabled;
303 struct net_port_vlans __rcu *vlan_info;
304#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305};
306
Herbert Xu68b7c892010-02-27 19:41:40 +0000307struct br_input_skb_cb {
308 struct net_device *brdev;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000309#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Herbert Xueb1d1642010-02-27 19:41:45 +0000310 int igmp;
311 int mrouters_only;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000312#endif
Herbert Xu68b7c892010-02-27 19:41:40 +0000313};
314
315#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
316
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000317#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
318# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
319#else
320# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
321#endif
322
stephen hemminger28a16c92010-05-10 09:31:09 +0000323#define br_printk(level, br, format, args...) \
324 printk(level "%s: " format, (br)->dev->name, ##args)
325
326#define br_err(__br, format, args...) \
327 br_printk(KERN_ERR, __br, format, ##args)
328#define br_warn(__br, format, args...) \
329 br_printk(KERN_WARNING, __br, format, ##args)
330#define br_notice(__br, format, args...) \
331 br_printk(KERN_NOTICE, __br, format, ##args)
332#define br_info(__br, format, args...) \
333 br_printk(KERN_INFO, __br, format, ##args)
334
335#define br_debug(br, format, args...) \
336 pr_debug("%s: " format, (br)->dev->name, ##args)
337
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338extern struct notifier_block br_device_notifier;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339
340/* called under bridge lock */
341static inline int br_is_root_bridge(const struct net_bridge *br)
342{
343 return !memcmp(&br->bridge_id, &br->designated_root, 8);
344}
345
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346/* br_device.c */
347extern void br_dev_setup(struct net_device *dev);
stephen hemminger1ce5cce2011-10-06 11:19:41 +0000348extern void br_dev_delete(struct net_device *dev, struct list_head *list);
Stephen Hemminger6fef4c02009-08-31 19:50:41 +0000349extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
350 struct net_device *dev);
stephen hemmingercfb478d2010-05-10 09:31:08 +0000351#ifdef CONFIG_NET_POLL_CONTROLLER
Herbert Xu91d2c342010-06-10 16:12:50 +0000352static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
353 struct sk_buff *skb)
354{
355 struct netpoll *np = p->np;
356
357 if (np)
358 netpoll_send_skb(np, skb);
359}
360
Amerigo Wang47be03a22012-08-10 01:24:37 +0000361extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
Herbert Xu91d2c342010-06-10 16:12:50 +0000362extern void br_netpoll_disable(struct net_bridge_port *p);
363#else
Herbert Xu9f70b0f2010-06-15 21:43:48 -0700364static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
Herbert Xu91d2c342010-06-10 16:12:50 +0000365 struct sk_buff *skb)
366{
367}
368
Amerigo Wang47be03a22012-08-10 01:24:37 +0000369static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
Herbert Xu91d2c342010-06-10 16:12:50 +0000370{
371 return 0;
372}
373
374static inline void br_netpoll_disable(struct net_bridge_port *p)
375{
376}
stephen hemmingercfb478d2010-05-10 09:31:08 +0000377#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378
379/* br_fdb.c */
Akinobu Mita87a596e2007-04-07 18:57:07 +0900380extern int br_fdb_init(void);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381extern void br_fdb_fini(void);
Stephen Hemminger9cf63742007-04-09 12:57:54 -0700382extern void br_fdb_flush(struct net_bridge *br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383extern void br_fdb_changeaddr(struct net_bridge_port *p,
384 const unsigned char *newaddr);
stephen hemminger43598812011-12-08 07:17:49 +0000385extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700386extern void br_fdb_cleanup(unsigned long arg);
387extern void br_fdb_delete_by_port(struct net_bridge *br,
Stephen Hemminger1a620692006-10-12 14:45:38 -0700388 const struct net_bridge_port *p, int do_all);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
Vlad Yasevich2ba071e2013-02-13 12:00:16 +0000390 const unsigned char *addr,
391 __u16 vid);
Michał Mirosławda678292009-06-05 05:35:28 +0000392extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900393extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700394 unsigned long count, unsigned long off);
395extern int br_fdb_insert(struct net_bridge *br,
396 struct net_bridge_port *source,
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000397 const unsigned char *addr,
398 u16 vid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399extern void br_fdb_update(struct net_bridge *br,
400 struct net_bridge_port *source,
Vlad Yasevich2ba071e2013-02-13 12:00:16 +0000401 const unsigned char *addr,
402 u16 vid);
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000403extern int fdb_delete_by_addr(struct net_bridge *br, const u8 *addr, u16 vid);
John Fastabend77162022012-04-15 06:43:56 +0000404
Vlad Yasevich1690be62013-02-13 12:00:18 +0000405extern int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
John Fastabend77162022012-04-15 06:43:56 +0000406 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000407 const unsigned char *addr);
stephen hemmingeredc7d572012-10-01 12:32:33 +0000408extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
John Fastabend77162022012-04-15 06:43:56 +0000409 struct net_device *dev,
stephen hemminger6b6e2722012-09-17 10:03:26 +0000410 const unsigned char *addr,
John Fastabend77162022012-04-15 06:43:56 +0000411 u16 nlh_flags);
412extern int br_fdb_dump(struct sk_buff *skb,
413 struct netlink_callback *cb,
414 struct net_device *dev,
415 int idx);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
417/* br_forward.c */
418extern void br_deliver(const struct net_bridge_port *to,
419 struct sk_buff *skb);
420extern int br_dev_queue_push_xmit(struct sk_buff *skb);
421extern void br_forward(const struct net_bridge_port *to,
Michael Braun7f7708f2010-03-16 00:26:22 -0700422 struct sk_buff *skb, struct sk_buff *skb0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423extern int br_forward_finish(struct sk_buff *skb);
Vlad Yasevich867a5942013-06-05 10:08:01 -0400424extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb,
425 bool unicast);
Herbert Xub33084b2010-02-27 19:41:41 +0000426extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
Vlad Yasevich867a5942013-06-05 10:08:01 -0400427 struct sk_buff *skb2, bool unicast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428
429/* br_if.c */
Stephen Hemminger269def72007-02-22 01:10:18 -0800430extern void br_port_carrier_check(struct net_bridge_port *p);
Alexey Dobriyan4aa678b2008-09-08 16:19:58 -0700431extern int br_add_bridge(struct net *net, const char *name);
432extern int br_del_bridge(struct net *net, const char *name);
Alexey Dobriyan712d6952008-09-08 16:20:18 -0700433extern void br_net_exit(struct net *net);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434extern int br_add_if(struct net_bridge *br,
435 struct net_device *dev);
436extern int br_del_if(struct net_bridge *br,
437 struct net_device *dev);
438extern int br_min_mtu(const struct net_bridge *br);
Michał Mirosławc8f44af2011-11-15 15:29:55 +0000439extern netdev_features_t br_features_recompute(struct net_bridge *br,
440 netdev_features_t features);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441
442/* br_input.c */
443extern int br_handle_frame_finish(struct sk_buff *skb);
Jiri Pirko8a4eb572011-03-12 03:14:39 +0000444extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445
446/* br_ioctl.c */
447extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
Eric W. Biederman881d9662007-09-17 11:56:21 -0700448extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
Herbert Xueb1d1642010-02-27 19:41:45 +0000450/* br_multicast.c */
451#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Cong Wang2ce297f2012-12-10 02:15:35 +0000452extern unsigned int br_mdb_rehash_seq;
Herbert Xueb1d1642010-02-27 19:41:45 +0000453extern int br_multicast_rcv(struct net_bridge *br,
454 struct net_bridge_port *port,
455 struct sk_buff *skb);
456extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
Cong Wangfbca58a2013-03-07 03:05:33 +0000457 struct sk_buff *skb, u16 vid);
Herbert Xueb1d1642010-02-27 19:41:45 +0000458extern void br_multicast_add_port(struct net_bridge_port *port);
459extern void br_multicast_del_port(struct net_bridge_port *port);
460extern void br_multicast_enable_port(struct net_bridge_port *port);
461extern void br_multicast_disable_port(struct net_bridge_port *port);
462extern void br_multicast_init(struct net_bridge *br);
463extern void br_multicast_open(struct net_bridge *br);
464extern void br_multicast_stop(struct net_bridge *br);
Herbert Xu5cb5e942010-02-27 19:41:46 +0000465extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
466 struct sk_buff *skb);
467extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
468 struct sk_buff *skb, struct sk_buff *skb2);
Herbert Xu0909e112010-02-27 19:41:49 +0000469extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
470extern int br_multicast_set_port_router(struct net_bridge_port *p,
471 unsigned long val);
Herbert Xu561f1102010-02-27 19:41:50 +0000472extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
Herbert Xuc5c23262012-04-13 02:37:42 +0000473extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
Herbert Xub1951672010-02-27 19:41:51 +0000474extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
Cong Wangcfd56752012-12-11 22:23:08 +0000475extern struct net_bridge_mdb_entry *br_mdb_ip_get(
476 struct net_bridge_mdb_htable *mdb,
477 struct br_ip *dst);
478extern struct net_bridge_mdb_entry *br_multicast_new_group(struct net_bridge *br,
479 struct net_bridge_port *port, struct br_ip *group);
480extern void br_multicast_free_pg(struct rcu_head *head);
481extern struct net_bridge_port_group *br_multicast_new_port_group(
482 struct net_bridge_port *port,
483 struct br_ip *group,
stephen hemminger762a3d82013-08-04 17:19:38 -0700484 struct net_bridge_port_group __rcu *next,
Amerigo Wangccb1c312012-12-14 22:09:51 +0000485 unsigned char state);
Cong Wangee07c6e2012-12-07 00:04:48 +0000486extern void br_mdb_init(void);
Vlad Yasevich63233152012-12-19 09:13:48 +0000487extern void br_mdb_uninit(void);
Cong Wang37a393b2012-12-11 22:23:07 +0000488extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
489 struct br_ip *group, int type);
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000490
Cong Wangcfd56752012-12-11 22:23:08 +0000491#define mlock_dereference(X, br) \
492 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
493
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000494static inline bool br_multicast_is_router(struct net_bridge *br)
495{
496 return br->multicast_router == 2 ||
497 (br->multicast_router == 1 &&
498 timer_pending(&br->multicast_router_timer));
499}
Linus Lüssingb00589a2013-08-01 01:06:20 +0200500
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200501static inline bool
502__br_multicast_querier_exists(struct net_bridge *br,
503 struct bridge_mcast_querier *querier)
Linus Lüssingb00589a2013-08-01 01:06:20 +0200504{
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200505 return time_is_before_jiffies(querier->delay_time) &&
506 (br->multicast_querier || timer_pending(&querier->timer));
507}
508
509static inline bool br_multicast_querier_exists(struct net_bridge *br,
510 struct ethhdr *eth)
511{
512 switch (eth->h_proto) {
513 case (htons(ETH_P_IP)):
514 return __br_multicast_querier_exists(br, &br->ip4_querier);
515#if IS_ENABLED(CONFIG_IPV6)
516 case (htons(ETH_P_IPV6)):
517 return __br_multicast_querier_exists(br, &br->ip6_querier);
518#endif
519 default:
520 return false;
521 }
Linus Lüssingb00589a2013-08-01 01:06:20 +0200522}
Herbert Xueb1d1642010-02-27 19:41:45 +0000523#else
524static inline int br_multicast_rcv(struct net_bridge *br,
525 struct net_bridge_port *port,
526 struct sk_buff *skb)
527{
528 return 0;
529}
530
531static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
Cong Wangfbca58a2013-03-07 03:05:33 +0000532 struct sk_buff *skb, u16 vid)
Herbert Xueb1d1642010-02-27 19:41:45 +0000533{
534 return NULL;
535}
536
537static inline void br_multicast_add_port(struct net_bridge_port *port)
538{
539}
540
541static inline void br_multicast_del_port(struct net_bridge_port *port)
542{
543}
544
545static inline void br_multicast_enable_port(struct net_bridge_port *port)
546{
547}
548
549static inline void br_multicast_disable_port(struct net_bridge_port *port)
550{
551}
552
553static inline void br_multicast_init(struct net_bridge *br)
554{
555}
556
557static inline void br_multicast_open(struct net_bridge *br)
558{
559}
560
561static inline void br_multicast_stop(struct net_bridge *br)
562{
563}
Herbert Xu5cb5e942010-02-27 19:41:46 +0000564
565static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
566 struct sk_buff *skb)
567{
568}
569
570static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
571 struct sk_buff *skb,
572 struct sk_buff *skb2)
573{
574}
Herbert Xueb1d1642010-02-27 19:41:45 +0000575static inline bool br_multicast_is_router(struct net_bridge *br)
576{
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000577 return 0;
Herbert Xueb1d1642010-02-27 19:41:45 +0000578}
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200579static inline bool br_multicast_querier_exists(struct net_bridge *br,
580 struct ethhdr *eth)
Linus Lüssingb00589a2013-08-01 01:06:20 +0200581{
582 return false;
583}
Rami Rosenfdb184d2013-01-03 13:30:43 +0200584static inline void br_mdb_init(void)
585{
586}
587static inline void br_mdb_uninit(void)
588{
589}
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000590#endif
Herbert Xueb1d1642010-02-27 19:41:45 +0000591
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000592/* br_vlan.c */
593#ifdef CONFIG_BRIDGE_VLAN_FILTERING
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000594extern bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
Vlad Yasevich78851982013-02-13 12:00:14 +0000595 struct sk_buff *skb, u16 *vid);
Vlad Yasevich85f46c62013-02-13 12:00:11 +0000596extern bool br_allowed_egress(struct net_bridge *br,
597 const struct net_port_vlans *v,
598 const struct sk_buff *skb);
Vlad Yasevich78851982013-02-13 12:00:14 +0000599extern struct sk_buff *br_handle_vlan(struct net_bridge *br,
600 const struct net_port_vlans *v,
601 struct sk_buff *skb);
Vlad Yasevich552406c2013-02-13 12:00:15 +0000602extern int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000603extern int br_vlan_delete(struct net_bridge *br, u16 vid);
604extern void br_vlan_flush(struct net_bridge *br);
605extern int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
Vlad Yasevich552406c2013-02-13 12:00:15 +0000606extern int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000607extern int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
608extern void nbp_vlan_flush(struct net_bridge_port *port);
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000609extern bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000610
611static inline struct net_port_vlans *br_get_vlan_info(
612 const struct net_bridge *br)
613{
Vlad Yasevich1690be62013-02-13 12:00:18 +0000614 return rcu_dereference_rtnl(br->vlan_info);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000615}
616
617static inline struct net_port_vlans *nbp_get_vlan_info(
618 const struct net_bridge_port *p)
619{
Vlad Yasevich1690be62013-02-13 12:00:18 +0000620 return rcu_dereference_rtnl(p->vlan_info);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000621}
622
623/* Since bridge now depends on 8021Q module, but the time bridge sees the
624 * skb, the vlan tag will always be present if the frame was tagged.
625 */
626static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
627{
628 int err = 0;
629
630 if (vlan_tx_tag_present(skb))
631 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
632 else {
633 *vid = 0;
634 err = -EINVAL;
635 }
636
637 return err;
638}
Vlad Yasevich78851982013-02-13 12:00:14 +0000639
640static inline u16 br_get_pvid(const struct net_port_vlans *v)
641{
642 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
643 * vid wasn't set
644 */
645 smp_rmb();
646 return (v->pvid & VLAN_TAG_PRESENT) ?
647 (v->pvid & ~VLAN_TAG_PRESENT) :
648 VLAN_N_VID;
649}
650
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000651#else
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000652static inline bool br_allowed_ingress(struct net_bridge *br,
653 struct net_port_vlans *v,
Vlad Yasevich78851982013-02-13 12:00:14 +0000654 struct sk_buff *skb,
655 u16 *vid)
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000656{
657 return true;
658}
659
Vlad Yasevich85f46c62013-02-13 12:00:11 +0000660static inline bool br_allowed_egress(struct net_bridge *br,
661 const struct net_port_vlans *v,
662 const struct sk_buff *skb)
663{
664 return true;
665}
666
Vlad Yasevich78851982013-02-13 12:00:14 +0000667static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
668 const struct net_port_vlans *v,
669 struct sk_buff *skb)
670{
671 return skb;
672}
673
Vlad Yasevich552406c2013-02-13 12:00:15 +0000674static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000675{
676 return -EOPNOTSUPP;
677}
678
679static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
680{
681 return -EOPNOTSUPP;
682}
683
684static inline void br_vlan_flush(struct net_bridge *br)
685{
686}
687
Vlad Yasevich552406c2013-02-13 12:00:15 +0000688static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000689{
690 return -EOPNOTSUPP;
691}
692
693static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
694{
695 return -EOPNOTSUPP;
696}
697
698static inline void nbp_vlan_flush(struct net_bridge_port *port)
699{
700}
701
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000702static inline struct net_port_vlans *br_get_vlan_info(
703 const struct net_bridge *br)
704{
705 return NULL;
706}
707static inline struct net_port_vlans *nbp_get_vlan_info(
708 const struct net_bridge_port *p)
709{
710 return NULL;
711}
712
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000713static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
714{
715 return false;
716}
717
Vlad Yasevich78851982013-02-13 12:00:14 +0000718static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000719{
720 return 0;
721}
Vlad Yasevich78851982013-02-13 12:00:14 +0000722static inline u16 br_get_pvid(const struct net_port_vlans *v)
723{
724 return VLAN_N_VID; /* Returns invalid vid */
725}
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000726#endif
727
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728/* br_netfilter.c */
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700729#ifdef CONFIG_BRIDGE_NETFILTER
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730extern int br_netfilter_init(void);
731extern void br_netfilter_fini(void);
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700732extern void br_netfilter_rtable_init(struct net_bridge *);
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700733#else
734#define br_netfilter_init() (0)
735#define br_netfilter_fini() do { } while(0)
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700736#define br_netfilter_rtable_init(x)
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700737#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700738
739/* br_stp.c */
740extern void br_log_state(const struct net_bridge_port *p);
741extern struct net_bridge_port *br_get_port(struct net_bridge *br,
YOSHIFUJI Hideaki9d6f2292007-02-09 23:24:35 +0900742 u16 port_no);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700743extern void br_init_port(struct net_bridge_port *p);
744extern void br_become_designated_port(struct net_bridge_port *p);
745
Herbert Xube4f1542013-09-12 17:12:05 +1000746extern void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
stephen hemminger14f98f22011-04-04 14:03:33 +0000747extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
748extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
749extern int br_set_max_age(struct net_bridge *br, unsigned long x);
750
751
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752/* br_stp_if.c */
753extern void br_stp_enable_bridge(struct net_bridge *br);
754extern void br_stp_disable_bridge(struct net_bridge *br);
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700755extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756extern void br_stp_enable_port(struct net_bridge_port *p);
757extern void br_stp_disable_port(struct net_bridge_port *p);
stephen hemmingeredf947f2011-03-24 13:24:01 +0000758extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
Stephen Hemminger4505a3e2005-12-21 18:51:49 -0800759extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760extern void br_stp_set_bridge_priority(struct net_bridge *br,
761 u16 newprio);
stephen hemminger14f98f22011-04-04 14:03:33 +0000762extern int br_stp_set_port_priority(struct net_bridge_port *p,
763 unsigned long newprio);
764extern int br_stp_set_path_cost(struct net_bridge_port *p,
765 unsigned long path_cost);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
767
768/* br_stp_bpdu.c */
Patrick McHardy7c85fbf2008-07-05 21:25:56 -0700769struct stp_proto;
770extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
771 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772
773/* br_stp_timer.c */
774extern void br_stp_timer_init(struct net_bridge *br);
775extern void br_stp_port_timer_init(struct net_bridge_port *p);
776extern unsigned long br_timer_value(const struct timer_list *timer);
777
778/* br.c */
Igor Maraviće6373c42011-12-12 02:58:25 +0000779#if IS_ENABLED(CONFIG_ATM_LANE)
Michał Mirosławda678292009-06-05 05:35:28 +0000780extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
781#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700783/* br_netlink.c */
stephen hemminger149ddd82012-06-26 05:48:45 +0000784extern struct rtnl_link_ops br_link_ops;
Thomas Graf32fe21c2007-03-22 11:59:03 -0700785extern int br_netlink_init(void);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700786extern void br_netlink_fini(void);
787extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
John Fastabende5a55a82012-10-24 08:12:57 +0000788extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
Vlad Yasevich407af322013-02-13 12:00:12 +0000789extern int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
John Fastabende5a55a82012-10-24 08:12:57 +0000790extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +0000791 struct net_device *dev, u32 filter_mask);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793#ifdef CONFIG_SYSFS
794/* br_sysfs_if.c */
Emese Revfy52cf25d2010-01-19 02:58:23 +0100795extern const struct sysfs_ops brport_sysfs_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700796extern int br_sysfs_addif(struct net_bridge_port *p);
Simon Arlotte0f43752010-05-10 09:31:11 +0000797extern int br_sysfs_renameif(struct net_bridge_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
799/* br_sysfs_br.c */
800extern int br_sysfs_addbr(struct net_device *dev);
801extern void br_sysfs_delbr(struct net_device *dev);
802
803#else
804
Lee Jones0cb2bbb2012-11-03 23:02:30 +0100805static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
806static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
807static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
808static inline void br_sysfs_delbr(struct net_device *dev) { return; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809#endif /* CONFIG_SYSFS */
810
811#endif