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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
Toshiaki Makitaf2808d22014-06-10 20:59:24 +090038/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
39#define BR_GROUPFWD_8021AD 0xB801u
stephen hemminger515853c2011-10-03 18:14:46 +000040
Stephen Hemminger9cde0702007-03-21 14:22:44 -070041/* Path to usermode spanning tree program */
42#define BR_STP_PROG "/sbin/bridge-stp"
Stephen Hemminger8cbb512e2005-12-21 19:01:30 -080043
Linus Torvalds1da177e2005-04-16 15:20:36 -070044typedef struct bridge_id bridge_id;
45typedef struct mac_addr mac_addr;
46typedef __u16 port_id;
47
48struct bridge_id
49{
50 unsigned char prio[2];
Joe Perchese5a727f2014-02-23 00:05:25 -080051 unsigned char addr[ETH_ALEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -070052};
53
54struct mac_addr
55{
Joe Perchese5a727f2014-02-23 00:05:25 -080056 unsigned char addr[ETH_ALEN];
Linus Torvalds1da177e2005-04-16 15:20:36 -070057};
58
Linus Lüssingcc0fdd82013-08-30 17:28:17 +020059#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
60/* our own querier */
Linus Lüssing90010b32014-06-07 18:26:26 +020061struct bridge_mcast_own_query {
Linus Lüssingcc0fdd82013-08-30 17:28:17 +020062 struct timer_list timer;
63 u32 startup_sent;
64};
65
66/* other querier */
Linus Lüssing90010b32014-06-07 18:26:26 +020067struct bridge_mcast_other_query {
Linus Lüssingcc0fdd82013-08-30 17:28:17 +020068 struct timer_list timer;
69 unsigned long delay_time;
70};
Linus Lüssingdc4eb532014-06-07 18:26:27 +020071
72/* selected querier */
73struct bridge_mcast_querier {
74 struct br_ip addr;
Linus Lüssing2cd41432014-06-07 18:26:29 +020075 struct net_bridge_port __rcu *port;
Linus Lüssingdc4eb532014-06-07 18:26:27 +020076};
Linus Lüssingcc0fdd82013-08-30 17:28:17 +020077#endif
78
Vlad Yasevich243a2e62013-02-13 12:00:09 +000079struct net_port_vlans {
80 u16 port_idx;
Vlad Yasevich78851982013-02-13 12:00:14 +000081 u16 pvid;
Vlad Yasevich243a2e62013-02-13 12:00:09 +000082 union {
83 struct net_bridge_port *port;
84 struct net_bridge *br;
85 } parent;
86 struct rcu_head rcu;
87 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
Vlad Yasevich35e03f32013-02-13 12:00:20 +000088 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
Vlad Yasevich6cbdcee2013-02-13 12:00:13 +000089 u16 num_vlans;
Vlad Yasevich243a2e62013-02-13 12:00:09 +000090};
91
Linus Torvalds1da177e2005-04-16 15:20:36 -070092struct net_bridge_fdb_entry
93{
94 struct hlist_node hlist;
95 struct net_bridge_port *dst;
96
97 struct rcu_head rcu;
stephen hemminger7cd88612011-04-04 14:03:28 +000098 unsigned long updated;
99 unsigned long used;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 mac_addr addr;
101 unsigned char is_local;
102 unsigned char is_static;
Toshiaki Makitaa5642ab2014-02-07 16:48:18 +0900103 unsigned char added_by_user;
Vlad Yasevich2ba071e2013-02-13 12:00:16 +0000104 __u16 vlan_id;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105};
106
Herbert Xueb1d1642010-02-27 19:41:45 +0000107struct net_bridge_port_group {
108 struct net_bridge_port *port;
Eric Dumazete8051682010-11-15 06:38:10 +0000109 struct net_bridge_port_group __rcu *next;
Herbert Xueb1d1642010-02-27 19:41:45 +0000110 struct hlist_node mglist;
111 struct rcu_head rcu;
112 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +0900113 struct br_ip addr;
Amerigo Wangccb1c312012-12-14 22:09:51 +0000114 unsigned char state;
Herbert Xueb1d1642010-02-27 19:41:45 +0000115};
116
117struct net_bridge_mdb_entry
118{
119 struct hlist_node hlist[2];
Herbert Xueb1d1642010-02-27 19:41:45 +0000120 struct net_bridge *br;
Eric Dumazete8051682010-11-15 06:38:10 +0000121 struct net_bridge_port_group __rcu *ports;
Herbert Xueb1d1642010-02-27 19:41:45 +0000122 struct rcu_head rcu;
123 struct timer_list timer;
YOSHIFUJI Hideaki8ef2a9a2010-04-18 12:42:07 +0900124 struct br_ip addr;
Herbert Xu8a870172011-02-12 01:05:42 -0800125 bool mglist;
Herbert Xueb1d1642010-02-27 19:41:45 +0000126};
127
128struct net_bridge_mdb_htable
129{
130 struct hlist_head *mhash;
131 struct rcu_head rcu;
132 struct net_bridge_mdb_htable *old;
133 u32 size;
134 u32 max;
135 u32 secret;
136 u32 ver;
137};
138
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139struct net_bridge_port
140{
141 struct net_bridge *br;
142 struct net_device *dev;
143 struct list_head list;
144
145 /* STP */
146 u8 priority;
147 u8 state;
148 u16 port_no;
149 unsigned char topology_change_ack;
150 unsigned char config_pending;
151 port_id port_id;
152 port_id designated_port;
153 bridge_id designated_root;
154 bridge_id designated_bridge;
155 u32 path_cost;
156 u32 designated_cost;
stephen hemminger0c031502011-07-22 07:47:06 +0000157 unsigned long designated_age;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
159 struct timer_list forward_delay_timer;
160 struct timer_list hold_timer;
161 struct timer_list message_age_timer;
162 struct kobject kobj;
163 struct rcu_head rcu;
Fischer, Anna3982d3d2009-08-13 06:55:16 +0000164
165 unsigned long flags;
166#define BR_HAIRPIN_MODE 0x00000001
stephen hemmingera2e01a62012-11-13 07:53:07 +0000167#define BR_BPDU_GUARD 0x00000002
stephen hemminger1007dd12012-11-13 07:53:08 +0000168#define BR_ROOT_BLOCK 0x00000004
David S. Millerc2d3bab2012-12-05 16:24:45 -0500169#define BR_MULTICAST_FAST_LEAVE 0x00000008
stephen hemminger8f3359b2013-04-13 14:06:07 +0000170#define BR_ADMIN_COST 0x00000010
Vlad Yasevich9ba18892013-06-05 10:08:00 -0400171#define BR_LEARNING 0x00000020
Vlad Yasevich867a5942013-06-05 10:08:01 -0400172#define BR_FLOOD 0x00000040
Vlad Yaseviche028e4b2014-05-16 09:59:16 -0400173#define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
Vlad Yasevichf3a6ddf2014-05-16 09:59:18 -0400174#define BR_PROMISC 0x00000080
Herbert Xueb1d1642010-02-27 19:41:45 +0000175
176#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Linus Lüssing90010b32014-06-07 18:26:26 +0200177 struct bridge_mcast_own_query ip4_own_query;
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200178#if IS_ENABLED(CONFIG_IPV6)
Linus Lüssing90010b32014-06-07 18:26:26 +0200179 struct bridge_mcast_own_query ip6_own_query;
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200180#endif /* IS_ENABLED(CONFIG_IPV6) */
Herbert Xueb1d1642010-02-27 19:41:45 +0000181 unsigned char multicast_router;
182 struct timer_list multicast_router_timer;
Herbert Xueb1d1642010-02-27 19:41:45 +0000183 struct hlist_head mglist;
184 struct hlist_node rlist;
185#endif
Simon Arlotte0f43752010-05-10 09:31:11 +0000186
187#ifdef CONFIG_SYSFS
188 char sysfs_name[IFNAMSIZ];
189#endif
Herbert Xu91d2c342010-06-10 16:12:50 +0000190
191#ifdef CONFIG_NET_POLL_CONTROLLER
192 struct netpoll *np;
193#endif
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000194#ifdef CONFIG_BRIDGE_VLAN_FILTERING
195 struct net_port_vlans __rcu *vlan_info;
196#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197};
198
Vlad Yaseviche028e4b2014-05-16 09:59:16 -0400199#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
Vlad Yasevichf3a6ddf2014-05-16 09:59:18 -0400200#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
Vlad Yaseviche028e4b2014-05-16 09:59:16 -0400201
Jiri Pirkof350a0a82010-06-15 06:50:45 +0000202#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
203
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000204static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
205{
Hong Zhiguo716ec052013-09-14 22:42:28 +0800206 return rcu_dereference(dev->rx_handler_data);
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000207}
208
Hong Zhiguo1fb17542013-09-14 22:42:27 +0800209static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000210{
Eric Dumazetec1e5612010-11-15 06:38:14 +0000211 return br_port_exists(dev) ?
212 rtnl_dereference(dev->rx_handler_data) : NULL;
stephen hemmingerb5ed54e2010-11-15 06:38:13 +0000213}
214
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215struct net_bridge
216{
217 spinlock_t lock;
218 struct list_head port_list;
219 struct net_device *dev;
stephen hemminger14bb4782010-03-02 13:32:09 +0000220
Li RongQing8f849852014-01-04 13:57:59 +0800221 struct pcpu_sw_netstats __percpu *stats;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 spinlock_t hash_lock;
223 struct hlist_head hash[BR_HASH_SIZE];
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700224#ifdef CONFIG_BRIDGE_NETFILTER
225 struct rtable fake_rtable;
Patrick McHardy4df53d82010-07-02 09:32:57 +0200226 bool nf_call_iptables;
227 bool nf_call_ip6tables;
228 bool nf_call_arptables;
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700229#endif
stephen hemminger515853c2011-10-03 18:14:46 +0000230 u16 group_fwd_mask;
Toshiaki Makitaf2808d22014-06-10 20:59:24 +0900231 u16 group_fwd_mask_required;
stephen hemminger515853c2011-10-03 18:14:46 +0000232
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 /* STP */
234 bridge_id designated_root;
235 bridge_id bridge_id;
236 u32 root_path_cost;
237 unsigned long max_age;
238 unsigned long hello_time;
239 unsigned long forward_delay;
240 unsigned long bridge_max_age;
241 unsigned long ageing_time;
242 unsigned long bridge_hello_time;
243 unsigned long bridge_forward_delay;
244
Stephen Hemmingerfda93d92006-03-20 22:59:21 -0800245 u8 group_addr[ETH_ALEN];
Toshiaki Makita204177f2014-06-10 20:59:25 +0900246 bool group_addr_set;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 u16 root_port;
Stephen Hemminger9cde0702007-03-21 14:22:44 -0700248
249 enum {
250 BR_NO_STP, /* no spanning tree */
251 BR_KERNEL_STP, /* old STP in kernel */
252 BR_USER_STP, /* new RSTP in userspace */
253 } stp_enabled;
254
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255 unsigned char topology_change;
256 unsigned char topology_change_detected;
257
Herbert Xueb1d1642010-02-27 19:41:45 +0000258#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
259 unsigned char multicast_router;
260
261 u8 multicast_disabled:1;
Herbert Xuc5c23262012-04-13 02:37:42 +0000262 u8 multicast_querier:1;
Cong Wang1c8ad5b2013-05-21 21:52:54 +0000263 u8 multicast_query_use_ifaddr:1;
Herbert Xueb1d1642010-02-27 19:41:45 +0000264
265 u32 hash_elasticity;
266 u32 hash_max;
267
268 u32 multicast_last_member_count;
Herbert Xueb1d1642010-02-27 19:41:45 +0000269 u32 multicast_startup_query_count;
270
271 unsigned long multicast_last_member_interval;
272 unsigned long multicast_membership_interval;
273 unsigned long multicast_querier_interval;
274 unsigned long multicast_query_interval;
275 unsigned long multicast_query_response_interval;
276 unsigned long multicast_startup_query_interval;
277
278 spinlock_t multicast_lock;
Eric Dumazete8051682010-11-15 06:38:10 +0000279 struct net_bridge_mdb_htable __rcu *mdb;
Herbert Xueb1d1642010-02-27 19:41:45 +0000280 struct hlist_head router_list;
Herbert Xueb1d1642010-02-27 19:41:45 +0000281
282 struct timer_list multicast_router_timer;
Linus Lüssing90010b32014-06-07 18:26:26 +0200283 struct bridge_mcast_other_query ip4_other_query;
284 struct bridge_mcast_own_query ip4_own_query;
Linus Lüssingdc4eb532014-06-07 18:26:27 +0200285 struct bridge_mcast_querier ip4_querier;
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200286#if IS_ENABLED(CONFIG_IPV6)
Linus Lüssing90010b32014-06-07 18:26:26 +0200287 struct bridge_mcast_other_query ip6_other_query;
288 struct bridge_mcast_own_query ip6_own_query;
Linus Lüssingdc4eb532014-06-07 18:26:27 +0200289 struct bridge_mcast_querier ip6_querier;
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200290#endif /* IS_ENABLED(CONFIG_IPV6) */
Herbert Xueb1d1642010-02-27 19:41:45 +0000291#endif
292
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293 struct timer_list hello_timer;
294 struct timer_list tcn_timer;
295 struct timer_list topology_change_timer;
296 struct timer_list gc_timer;
Greg Kroah-Hartman43b98c42007-12-17 15:54:39 -0400297 struct kobject *ifobj;
Vlad Yaseviche028e4b2014-05-16 09:59:16 -0400298 u32 auto_cnt;
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000299#ifdef CONFIG_BRIDGE_VLAN_FILTERING
300 u8 vlan_enabled;
Toshiaki Makita8580e212014-06-10 20:59:23 +0900301 __be16 vlan_proto;
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000302 struct net_port_vlans __rcu *vlan_info;
303#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304};
305
Herbert Xu68b7c892010-02-27 19:41:40 +0000306struct br_input_skb_cb {
307 struct net_device *brdev;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000308#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Herbert Xueb1d1642010-02-27 19:41:45 +0000309 int igmp;
310 int mrouters_only;
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000311#endif
Herbert Xu68b7c892010-02-27 19:41:40 +0000312};
313
314#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
315
YOSHIFUJI Hideaki / 吉藤英明32dec5d2010-03-15 21:51:18 +0000316#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
317# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
318#else
319# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
320#endif
321
stephen hemminger28a16c92010-05-10 09:31:09 +0000322#define br_printk(level, br, format, args...) \
323 printk(level "%s: " format, (br)->dev->name, ##args)
324
325#define br_err(__br, format, args...) \
326 br_printk(KERN_ERR, __br, format, ##args)
327#define br_warn(__br, format, args...) \
328 br_printk(KERN_WARNING, __br, format, ##args)
329#define br_notice(__br, format, args...) \
330 br_printk(KERN_NOTICE, __br, format, ##args)
331#define br_info(__br, format, args...) \
332 br_printk(KERN_INFO, __br, format, ##args)
333
334#define br_debug(br, format, args...) \
335 pr_debug("%s: " format, (br)->dev->name, ##args)
336
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337/* called under bridge lock */
338static inline int br_is_root_bridge(const struct net_bridge *br)
339{
340 return !memcmp(&br->bridge_id, &br->designated_root, 8);
341}
342
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343/* br_device.c */
Joe Perches348662a2013-10-18 13:48:22 -0700344void br_dev_setup(struct net_device *dev);
345void br_dev_delete(struct net_device *dev, struct list_head *list);
346netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
stephen hemmingercfb478d2010-05-10 09:31:08 +0000347#ifdef CONFIG_NET_POLL_CONTROLLER
Herbert Xu91d2c342010-06-10 16:12:50 +0000348static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
349 struct sk_buff *skb)
350{
351 struct netpoll *np = p->np;
352
353 if (np)
354 netpoll_send_skb(np, skb);
355}
356
Eric W. Biedermana8779ec2014-03-27 15:36:38 -0700357int br_netpoll_enable(struct net_bridge_port *p);
Joe Perches348662a2013-10-18 13:48:22 -0700358void br_netpoll_disable(struct net_bridge_port *p);
Herbert Xu91d2c342010-06-10 16:12:50 +0000359#else
Herbert Xu9f70b0f2010-06-15 21:43:48 -0700360static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
Herbert Xu91d2c342010-06-10 16:12:50 +0000361 struct sk_buff *skb)
362{
363}
364
Eric W. Biedermana8779ec2014-03-27 15:36:38 -0700365static inline int br_netpoll_enable(struct net_bridge_port *p)
Herbert Xu91d2c342010-06-10 16:12:50 +0000366{
367 return 0;
368}
369
370static inline void br_netpoll_disable(struct net_bridge_port *p)
371{
372}
stephen hemmingercfb478d2010-05-10 09:31:08 +0000373#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
375/* br_fdb.c */
Joe Perches348662a2013-10-18 13:48:22 -0700376int br_fdb_init(void);
377void br_fdb_fini(void);
378void br_fdb_flush(struct net_bridge *br);
Toshiaki Makita424bb9c2014-02-07 16:48:25 +0900379void br_fdb_find_delete_local(struct net_bridge *br,
380 const struct net_bridge_port *p,
381 const unsigned char *addr, u16 vid);
Joe Perches348662a2013-10-18 13:48:22 -0700382void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
383void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
384void br_fdb_cleanup(unsigned long arg);
385void br_fdb_delete_by_port(struct net_bridge *br,
386 const struct net_bridge_port *p, int do_all);
387struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
388 const unsigned char *addr, __u16 vid);
389int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
390int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
391 unsigned long off);
392int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
393 const unsigned char *addr, u16 vid);
394void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
Toshiaki Makitaa5642ab2014-02-07 16:48:18 +0900395 const unsigned char *addr, u16 vid, bool added_by_user);
John Fastabend77162022012-04-15 06:43:56 +0000396
Joe Perches348662a2013-10-18 13:48:22 -0700397int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
398 struct net_device *dev, const unsigned char *addr);
399int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
400 const unsigned char *addr, u16 nlh_flags);
401int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
402 struct net_device *dev, int idx);
Vlad Yasevich8db24af2014-05-16 09:59:17 -0400403int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
404void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700405
406/* br_forward.c */
Joe Perches348662a2013-10-18 13:48:22 -0700407void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
408int br_dev_queue_push_xmit(struct sk_buff *skb);
409void br_forward(const struct net_bridge_port *to,
Michael Braun7f7708f2010-03-16 00:26:22 -0700410 struct sk_buff *skb, struct sk_buff *skb0);
Joe Perches348662a2013-10-18 13:48:22 -0700411int br_forward_finish(struct sk_buff *skb);
412void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
413void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
414 struct sk_buff *skb2, bool unicast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
416/* br_if.c */
Joe Perches348662a2013-10-18 13:48:22 -0700417void br_port_carrier_check(struct net_bridge_port *p);
418int br_add_bridge(struct net *net, const char *name);
419int br_del_bridge(struct net *net, const char *name);
Joe Perches348662a2013-10-18 13:48:22 -0700420int br_add_if(struct net_bridge *br, struct net_device *dev);
421int br_del_if(struct net_bridge *br, struct net_device *dev);
422int br_min_mtu(const struct net_bridge *br);
423netdev_features_t br_features_recompute(struct net_bridge *br,
424 netdev_features_t features);
Vlad Yaseviche028e4b2014-05-16 09:59:16 -0400425void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
Vlad Yasevich2796d0c2014-05-16 09:59:20 -0400426void br_manage_promisc(struct net_bridge *br);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
428/* br_input.c */
Joe Perches348662a2013-10-18 13:48:22 -0700429int br_handle_frame_finish(struct sk_buff *skb);
430rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431
Jiri Pirko859828c2013-12-05 16:27:37 +0100432static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
433{
434 return rcu_dereference(dev->rx_handler) == br_handle_frame;
435}
436
437static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
438{
439 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
440}
441
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442/* br_ioctl.c */
Joe Perches348662a2013-10-18 13:48:22 -0700443int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
444int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
445 void __user *arg);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446
Herbert Xueb1d1642010-02-27 19:41:45 +0000447/* br_multicast.c */
448#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
Cong Wang2ce297f2012-12-10 02:15:35 +0000449extern unsigned int br_mdb_rehash_seq;
Joe Perches348662a2013-10-18 13:48:22 -0700450int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
David S. Miller394efd12013-11-04 13:48:30 -0500451 struct sk_buff *skb, u16 vid);
Joe Perches348662a2013-10-18 13:48:22 -0700452struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
453 struct sk_buff *skb, u16 vid);
454void br_multicast_add_port(struct net_bridge_port *port);
455void br_multicast_del_port(struct net_bridge_port *port);
456void br_multicast_enable_port(struct net_bridge_port *port);
457void br_multicast_disable_port(struct net_bridge_port *port);
458void br_multicast_init(struct net_bridge *br);
459void br_multicast_open(struct net_bridge *br);
460void br_multicast_stop(struct net_bridge *br);
461void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
462 struct sk_buff *skb);
463void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
464 struct sk_buff *skb, struct sk_buff *skb2);
465int br_multicast_set_router(struct net_bridge *br, unsigned long val);
466int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
467int br_multicast_toggle(struct net_bridge *br, unsigned long val);
468int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
469int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
470struct net_bridge_mdb_entry *
471br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
472struct net_bridge_mdb_entry *
473br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
474 struct br_ip *group);
475void br_multicast_free_pg(struct rcu_head *head);
476struct net_bridge_port_group *
477br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
478 struct net_bridge_port_group __rcu *next,
479 unsigned char state);
480void br_mdb_init(void);
481void br_mdb_uninit(void);
482void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
483 struct br_ip *group, int type);
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000484
Cong Wangcfd56752012-12-11 22:23:08 +0000485#define mlock_dereference(X, br) \
486 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
487
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000488static inline bool br_multicast_is_router(struct net_bridge *br)
489{
490 return br->multicast_router == 2 ||
491 (br->multicast_router == 1 &&
492 timer_pending(&br->multicast_router_timer));
493}
Linus Lüssingb00589a2013-08-01 01:06:20 +0200494
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200495static inline bool
496__br_multicast_querier_exists(struct net_bridge *br,
Linus Lüssing90010b32014-06-07 18:26:26 +0200497 struct bridge_mcast_other_query *querier)
Linus Lüssingb00589a2013-08-01 01:06:20 +0200498{
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200499 return time_is_before_jiffies(querier->delay_time) &&
500 (br->multicast_querier || timer_pending(&querier->timer));
501}
502
503static inline bool br_multicast_querier_exists(struct net_bridge *br,
504 struct ethhdr *eth)
505{
506 switch (eth->h_proto) {
507 case (htons(ETH_P_IP)):
Linus Lüssing90010b32014-06-07 18:26:26 +0200508 return __br_multicast_querier_exists(br, &br->ip4_other_query);
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200509#if IS_ENABLED(CONFIG_IPV6)
510 case (htons(ETH_P_IPV6)):
Linus Lüssing90010b32014-06-07 18:26:26 +0200511 return __br_multicast_querier_exists(br, &br->ip6_other_query);
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200512#endif
513 default:
514 return false;
515 }
Linus Lüssingb00589a2013-08-01 01:06:20 +0200516}
Herbert Xueb1d1642010-02-27 19:41:45 +0000517#else
518static inline int br_multicast_rcv(struct net_bridge *br,
519 struct net_bridge_port *port,
Vlad Yasevich06499092013-10-28 15:45:07 -0400520 struct sk_buff *skb,
521 u16 vid)
Herbert Xueb1d1642010-02-27 19:41:45 +0000522{
523 return 0;
524}
525
526static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
Cong Wangfbca58a2013-03-07 03:05:33 +0000527 struct sk_buff *skb, u16 vid)
Herbert Xueb1d1642010-02-27 19:41:45 +0000528{
529 return NULL;
530}
531
532static inline void br_multicast_add_port(struct net_bridge_port *port)
533{
534}
535
536static inline void br_multicast_del_port(struct net_bridge_port *port)
537{
538}
539
540static inline void br_multicast_enable_port(struct net_bridge_port *port)
541{
542}
543
544static inline void br_multicast_disable_port(struct net_bridge_port *port)
545{
546}
547
548static inline void br_multicast_init(struct net_bridge *br)
549{
550}
551
552static inline void br_multicast_open(struct net_bridge *br)
553{
554}
555
556static inline void br_multicast_stop(struct net_bridge *br)
557{
558}
Herbert Xu5cb5e942010-02-27 19:41:46 +0000559
560static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
561 struct sk_buff *skb)
562{
563}
564
565static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
566 struct sk_buff *skb,
567 struct sk_buff *skb2)
568{
569}
Herbert Xueb1d1642010-02-27 19:41:45 +0000570static inline bool br_multicast_is_router(struct net_bridge *br)
571{
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000572 return 0;
Herbert Xueb1d1642010-02-27 19:41:45 +0000573}
Linus Lüssingcc0fdd82013-08-30 17:28:17 +0200574static inline bool br_multicast_querier_exists(struct net_bridge *br,
575 struct ethhdr *eth)
Linus Lüssingb00589a2013-08-01 01:06:20 +0200576{
577 return false;
578}
Rami Rosenfdb184d2013-01-03 13:30:43 +0200579static inline void br_mdb_init(void)
580{
581}
582static inline void br_mdb_uninit(void)
583{
584}
Sridhar Samudrala85b35262010-03-01 09:53:04 +0000585#endif
Herbert Xueb1d1642010-02-27 19:41:45 +0000586
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000587/* br_vlan.c */
588#ifdef CONFIG_BRIDGE_VLAN_FILTERING
Joe Perches348662a2013-10-18 13:48:22 -0700589bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
590 struct sk_buff *skb, u16 *vid);
591bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
592 const struct sk_buff *skb);
Toshiaki Makitae0d79682014-05-26 15:15:53 +0900593bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
Joe Perches348662a2013-10-18 13:48:22 -0700594struct sk_buff *br_handle_vlan(struct net_bridge *br,
595 const struct net_port_vlans *v,
596 struct sk_buff *skb);
597int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
598int br_vlan_delete(struct net_bridge *br, u16 vid);
599void br_vlan_flush(struct net_bridge *br);
Toshiaki Makita2b292fb2014-02-07 16:48:22 +0900600bool br_vlan_find(struct net_bridge *br, u16 vid);
Toshiaki Makita204177f2014-06-10 20:59:25 +0900601void br_recalculate_fwd_mask(struct net_bridge *br);
Joe Perches348662a2013-10-18 13:48:22 -0700602int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
Toshiaki Makita204177f2014-06-10 20:59:25 +0900603int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
Toshiaki Makita8580e212014-06-10 20:59:23 +0900604void br_vlan_init(struct net_bridge *br);
Joe Perches348662a2013-10-18 13:48:22 -0700605int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
606int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
607void nbp_vlan_flush(struct net_bridge_port *port);
608bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000609
610static inline struct net_port_vlans *br_get_vlan_info(
611 const struct net_bridge *br)
612{
Vlad Yasevich1690be62013-02-13 12:00:18 +0000613 return rcu_dereference_rtnl(br->vlan_info);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000614}
615
616static inline struct net_port_vlans *nbp_get_vlan_info(
617 const struct net_bridge_port *p)
618{
Vlad Yasevich1690be62013-02-13 12:00:18 +0000619 return rcu_dereference_rtnl(p->vlan_info);
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000620}
621
622/* Since bridge now depends on 8021Q module, but the time bridge sees the
623 * skb, the vlan tag will always be present if the frame was tagged.
624 */
625static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
626{
627 int err = 0;
628
629 if (vlan_tx_tag_present(skb))
630 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
631 else {
632 *vid = 0;
633 err = -EINVAL;
634 }
635
636 return err;
637}
Vlad Yasevich78851982013-02-13 12:00:14 +0000638
639static inline u16 br_get_pvid(const struct net_port_vlans *v)
640{
641 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
642 * vid wasn't set
643 */
644 smp_rmb();
Toshiaki Makitad1c6c702013-10-16 17:07:15 +0900645 return v->pvid ?: VLAN_N_VID;
Vlad Yasevich78851982013-02-13 12:00:14 +0000646}
647
Vlad Yasevich2796d0c2014-05-16 09:59:20 -0400648static inline int br_vlan_enabled(struct net_bridge *br)
649{
650 return br->vlan_enabled;
651}
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000652#else
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000653static inline bool br_allowed_ingress(struct net_bridge *br,
654 struct net_port_vlans *v,
Vlad Yasevich78851982013-02-13 12:00:14 +0000655 struct sk_buff *skb,
656 u16 *vid)
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000657{
658 return true;
659}
660
Vlad Yasevich85f46c62013-02-13 12:00:11 +0000661static inline bool br_allowed_egress(struct net_bridge *br,
662 const struct net_port_vlans *v,
663 const struct sk_buff *skb)
664{
665 return true;
666}
667
Toshiaki Makitae0d79682014-05-26 15:15:53 +0900668static inline bool br_should_learn(struct net_bridge_port *p,
669 struct sk_buff *skb, u16 *vid)
670{
671 return true;
672}
673
Vlad Yasevich78851982013-02-13 12:00:14 +0000674static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
675 const struct net_port_vlans *v,
676 struct sk_buff *skb)
677{
678 return skb;
679}
680
Vlad Yasevich552406c2013-02-13 12:00:15 +0000681static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000682{
683 return -EOPNOTSUPP;
684}
685
686static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
687{
688 return -EOPNOTSUPP;
689}
690
691static inline void br_vlan_flush(struct net_bridge *br)
692{
693}
694
Toshiaki Makita2b292fb2014-02-07 16:48:22 +0900695static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
696{
697 return false;
698}
699
Toshiaki Makita204177f2014-06-10 20:59:25 +0900700static inline void br_recalculate_fwd_mask(struct net_bridge *br)
701{
702}
703
Toshiaki Makita8580e212014-06-10 20:59:23 +0900704static inline void br_vlan_init(struct net_bridge *br)
705{
706}
707
Vlad Yasevich552406c2013-02-13 12:00:15 +0000708static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000709{
710 return -EOPNOTSUPP;
711}
712
713static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
714{
715 return -EOPNOTSUPP;
716}
717
718static inline void nbp_vlan_flush(struct net_bridge_port *port)
719{
720}
721
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000722static inline struct net_port_vlans *br_get_vlan_info(
723 const struct net_bridge *br)
724{
725 return NULL;
726}
727static inline struct net_port_vlans *nbp_get_vlan_info(
728 const struct net_bridge_port *p)
729{
730 return NULL;
731}
732
Vlad Yasevichbc9a25d2013-02-13 12:00:19 +0000733static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
734{
735 return false;
736}
737
Vlad Yasevich78851982013-02-13 12:00:14 +0000738static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
Vlad Yasevicha37b85c2013-02-13 12:00:10 +0000739{
740 return 0;
741}
Vlad Yasevich78851982013-02-13 12:00:14 +0000742static inline u16 br_get_pvid(const struct net_port_vlans *v)
743{
744 return VLAN_N_VID; /* Returns invalid vid */
745}
Vlad Yasevich2796d0c2014-05-16 09:59:20 -0400746
Alexei Starovoitovd4f0e092014-05-18 10:30:28 -0700747static inline int br_vlan_enabled(struct net_bridge *br)
Vlad Yasevich2796d0c2014-05-16 09:59:20 -0400748{
749 return 0;
750}
Vlad Yasevich243a2e62013-02-13 12:00:09 +0000751#endif
752
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753/* br_netfilter.c */
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700754#ifdef CONFIG_BRIDGE_NETFILTER
Joe Perches348662a2013-10-18 13:48:22 -0700755int br_netfilter_init(void);
756void br_netfilter_fini(void);
757void br_netfilter_rtable_init(struct net_bridge *);
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700758#else
759#define br_netfilter_init() (0)
tanxiaojun31a5b832013-12-19 13:28:12 +0800760#define br_netfilter_fini() do { } while (0)
Simon Wunderlich4adf0af2008-07-30 16:27:55 -0700761#define br_netfilter_rtable_init(x)
Stephen Hemmingerc0909712006-05-25 15:59:33 -0700762#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
764/* br_stp.c */
Joe Perches348662a2013-10-18 13:48:22 -0700765void br_log_state(const struct net_bridge_port *p);
766struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
767void br_init_port(struct net_bridge_port *p);
768void br_become_designated_port(struct net_bridge_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769
Joe Perches348662a2013-10-18 13:48:22 -0700770void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
771int br_set_forward_delay(struct net_bridge *br, unsigned long x);
772int br_set_hello_time(struct net_bridge *br, unsigned long x);
773int br_set_max_age(struct net_bridge *br, unsigned long x);
stephen hemminger14f98f22011-04-04 14:03:33 +0000774
775
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776/* br_stp_if.c */
Joe Perches348662a2013-10-18 13:48:22 -0700777void br_stp_enable_bridge(struct net_bridge *br);
778void br_stp_disable_bridge(struct net_bridge *br);
779void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
780void br_stp_enable_port(struct net_bridge_port *p);
781void br_stp_disable_port(struct net_bridge_port *p);
782bool br_stp_recalculate_bridge_id(struct net_bridge *br);
783void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
784void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
785int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
786int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
787ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
789/* br_stp_bpdu.c */
Patrick McHardy7c85fbf2008-07-05 21:25:56 -0700790struct stp_proto;
Joe Perches348662a2013-10-18 13:48:22 -0700791void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
792 struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793
794/* br_stp_timer.c */
Joe Perches348662a2013-10-18 13:48:22 -0700795void br_stp_timer_init(struct net_bridge *br);
796void br_stp_port_timer_init(struct net_bridge_port *p);
797unsigned long br_timer_value(const struct timer_list *timer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798
799/* br.c */
Igor Maraviće6373c42011-12-12 02:58:25 +0000800#if IS_ENABLED(CONFIG_ATM_LANE)
Michał Mirosławda678292009-06-05 05:35:28 +0000801extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
802#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700804/* br_netlink.c */
stephen hemminger149ddd82012-06-26 05:48:45 +0000805extern struct rtnl_link_ops br_link_ops;
Joe Perches348662a2013-10-18 13:48:22 -0700806int br_netlink_init(void);
807void br_netlink_fini(void);
808void br_ifinfo_notify(int event, struct net_bridge_port *port);
809int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
810int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
811int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
812 u32 filter_mask);
Stephen Hemminger11dc1f32006-05-25 16:00:12 -0700813
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814#ifdef CONFIG_SYSFS
815/* br_sysfs_if.c */
Emese Revfy52cf25d2010-01-19 02:58:23 +0100816extern const struct sysfs_ops brport_sysfs_ops;
Joe Perches348662a2013-10-18 13:48:22 -0700817int br_sysfs_addif(struct net_bridge_port *p);
818int br_sysfs_renameif(struct net_bridge_port *p);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700819
820/* br_sysfs_br.c */
Joe Perches348662a2013-10-18 13:48:22 -0700821int br_sysfs_addbr(struct net_device *dev);
822void br_sysfs_delbr(struct net_device *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823
824#else
825
Lee Jones0cb2bbb2012-11-03 23:02:30 +0100826static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
827static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
828static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
829static inline void br_sysfs_delbr(struct net_device *dev) { return; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830#endif /* CONFIG_SYSFS */
831
832#endif