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CommitLineData
1da177e4
LT
1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
1da177e4
LT
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
11 */
12
13#ifndef _BR_PRIVATE_H
14#define _BR_PRIVATE_H
15
16#include <linux/netdevice.h>
1da177e4 17#include <linux/if_bridge.h>
91d2c34a 18#include <linux/netpoll.h>
406818ff 19#include <linux/u64_stats_sync.h>
4adf0af6 20#include <net/route.h>
efb6de9b 21#include <net/ip6_fib.h>
243a2e63 22#include <linux/if_vlan.h>
1da177e4
LT
23
24#define BR_HASH_BITS 8
25#define BR_HASH_SIZE (1 << BR_HASH_BITS)
26
27#define BR_HOLD_TIME (1*HZ)
28
29#define BR_PORT_BITS 10
30#define BR_MAX_PORTS (1<<BR_PORT_BITS)
243a2e63 31#define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
1da177e4 32
9cde0708
SH
33#define BR_VERSION "2.3"
34
515853cc 35/* Control of forwarding link local multicast */
36#define BR_GROUPFWD_DEFAULT 0
784b58a3
BT
37/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
38#define BR_GROUPFWD_RESTRICTED 0x0007u
f2808d22
TM
39/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
40#define BR_GROUPFWD_8021AD 0xB801u
515853cc 41
9cde0708
SH
42/* Path to usermode spanning tree program */
43#define BR_STP_PROG "/sbin/bridge-stp"
8cbb512e 44
1da177e4
LT
45typedef struct bridge_id bridge_id;
46typedef struct mac_addr mac_addr;
47typedef __u16 port_id;
48
49struct bridge_id
50{
51 unsigned char prio[2];
e5a727f6 52 unsigned char addr[ETH_ALEN];
1da177e4
LT
53};
54
55struct mac_addr
56{
e5a727f6 57 unsigned char addr[ETH_ALEN];
1da177e4
LT
58};
59
cc0fdd80
LL
60#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
61/* our own querier */
90010b36 62struct bridge_mcast_own_query {
cc0fdd80
LL
63 struct timer_list timer;
64 u32 startup_sent;
65};
66
67/* other querier */
90010b36 68struct bridge_mcast_other_query {
cc0fdd80
LL
69 struct timer_list timer;
70 unsigned long delay_time;
71};
dc4eb53a
LL
72
73/* selected querier */
74struct bridge_mcast_querier {
75 struct br_ip addr;
2cd41431 76 struct net_bridge_port __rcu *port;
dc4eb53a 77};
cc0fdd80
LL
78#endif
79
243a2e63
VY
80struct net_port_vlans {
81 u16 port_idx;
78851988 82 u16 pvid;
243a2e63
VY
83 union {
84 struct net_bridge_port *port;
85 struct net_bridge *br;
86 } parent;
87 struct rcu_head rcu;
88 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
35e03f3a 89 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
6cbdceeb 90 u16 num_vlans;
243a2e63
VY
91};
92
1da177e4
LT
93struct net_bridge_fdb_entry
94{
95 struct hlist_node hlist;
96 struct net_bridge_port *dst;
97
98 struct rcu_head rcu;
7cd8861a 99 unsigned long updated;
100 unsigned long used;
1da177e4 101 mac_addr addr;
93859b13
JP
102 unsigned char is_local:1,
103 is_static:1,
cf6b8e1e
SF
104 added_by_user:1,
105 added_by_external_learn:1;
2ba071ec 106 __u16 vlan_id;
1da177e4
LT
107};
108
eb1d1641
HX
109struct net_bridge_port_group {
110 struct net_bridge_port *port;
e8051688 111 struct net_bridge_port_group __rcu *next;
eb1d1641
HX
112 struct hlist_node mglist;
113 struct rcu_head rcu;
114 struct timer_list timer;
8ef2a9a5 115 struct br_ip addr;
ccb1c31a 116 unsigned char state;
eb1d1641
HX
117};
118
119struct net_bridge_mdb_entry
120{
121 struct hlist_node hlist[2];
eb1d1641 122 struct net_bridge *br;
e8051688 123 struct net_bridge_port_group __rcu *ports;
eb1d1641
HX
124 struct rcu_head rcu;
125 struct timer_list timer;
8ef2a9a5 126 struct br_ip addr;
8a870178 127 bool mglist;
eb1d1641
HX
128};
129
130struct net_bridge_mdb_htable
131{
132 struct hlist_head *mhash;
133 struct rcu_head rcu;
134 struct net_bridge_mdb_htable *old;
135 u32 size;
136 u32 max;
137 u32 secret;
138 u32 ver;
139};
140
1da177e4
LT
141struct net_bridge_port
142{
143 struct net_bridge *br;
144 struct net_device *dev;
145 struct list_head list;
146
147 /* STP */
148 u8 priority;
149 u8 state;
150 u16 port_no;
151 unsigned char topology_change_ack;
152 unsigned char config_pending;
153 port_id port_id;
154 port_id designated_port;
155 bridge_id designated_root;
156 bridge_id designated_bridge;
157 u32 path_cost;
158 u32 designated_cost;
0c03150e 159 unsigned long designated_age;
1da177e4
LT
160
161 struct timer_list forward_delay_timer;
162 struct timer_list hold_timer;
163 struct timer_list message_age_timer;
164 struct kobject kobj;
165 struct rcu_head rcu;
3982d3d2
FA
166
167 unsigned long flags;
eb1d1641
HX
168
169#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
90010b36 170 struct bridge_mcast_own_query ip4_own_query;
cc0fdd80 171#if IS_ENABLED(CONFIG_IPV6)
90010b36 172 struct bridge_mcast_own_query ip6_own_query;
cc0fdd80 173#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX
174 unsigned char multicast_router;
175 struct timer_list multicast_router_timer;
eb1d1641
HX
176 struct hlist_head mglist;
177 struct hlist_node rlist;
178#endif
e0f43752
SA
179
180#ifdef CONFIG_SYSFS
181 char sysfs_name[IFNAMSIZ];
182#endif
91d2c34a
HX
183
184#ifdef CONFIG_NET_POLL_CONTROLLER
185 struct netpoll *np;
186#endif
243a2e63
VY
187#ifdef CONFIG_BRIDGE_VLAN_FILTERING
188 struct net_port_vlans __rcu *vlan_info;
189#endif
1da177e4
LT
190};
191
e028e4b8 192#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
f3a6ddf1 193#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
e028e4b8 194
f350a0a8
JP
195#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
196
b5ed54e9 197static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
198{
716ec052 199 return rcu_dereference(dev->rx_handler_data);
b5ed54e9 200}
201
1fb1754a 202static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
b5ed54e9 203{
ec1e5610
ED
204 return br_port_exists(dev) ?
205 rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9 206}
207
1da177e4
LT
208struct net_bridge
209{
210 spinlock_t lock;
211 struct list_head port_list;
212 struct net_device *dev;
14bb4789 213
8f84985f 214 struct pcpu_sw_netstats __percpu *stats;
1da177e4
LT
215 spinlock_t hash_lock;
216 struct hlist_head hash[BR_HASH_SIZE];
34666d46 217#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
efb6de9b
BT
218 union {
219 struct rtable fake_rtable;
220 struct rt6_info fake_rt6_info;
221 };
4df53d8b
PM
222 bool nf_call_iptables;
223 bool nf_call_ip6tables;
224 bool nf_call_arptables;
4adf0af6 225#endif
515853cc 226 u16 group_fwd_mask;
f2808d22 227 u16 group_fwd_mask_required;
515853cc 228
1da177e4
LT
229 /* STP */
230 bridge_id designated_root;
231 bridge_id bridge_id;
232 u32 root_path_cost;
233 unsigned long max_age;
234 unsigned long hello_time;
235 unsigned long forward_delay;
236 unsigned long bridge_max_age;
237 unsigned long ageing_time;
238 unsigned long bridge_hello_time;
239 unsigned long bridge_forward_delay;
240
fda93d92 241 u8 group_addr[ETH_ALEN];
204177f3 242 bool group_addr_set;
1da177e4 243 u16 root_port;
9cde0708
SH
244
245 enum {
246 BR_NO_STP, /* no spanning tree */
247 BR_KERNEL_STP, /* old STP in kernel */
248 BR_USER_STP, /* new RSTP in userspace */
249 } stp_enabled;
250
1da177e4
LT
251 unsigned char topology_change;
252 unsigned char topology_change_detected;
253
eb1d1641
HX
254#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
255 unsigned char multicast_router;
256
257 u8 multicast_disabled:1;
c5c23260 258 u8 multicast_querier:1;
1c8ad5bf 259 u8 multicast_query_use_ifaddr:1;
eb1d1641
HX
260
261 u32 hash_elasticity;
262 u32 hash_max;
263
264 u32 multicast_last_member_count;
eb1d1641
HX
265 u32 multicast_startup_query_count;
266
267 unsigned long multicast_last_member_interval;
268 unsigned long multicast_membership_interval;
269 unsigned long multicast_querier_interval;
270 unsigned long multicast_query_interval;
271 unsigned long multicast_query_response_interval;
272 unsigned long multicast_startup_query_interval;
273
274 spinlock_t multicast_lock;
e8051688 275 struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641 276 struct hlist_head router_list;
eb1d1641
HX
277
278 struct timer_list multicast_router_timer;
90010b36
LL
279 struct bridge_mcast_other_query ip4_other_query;
280 struct bridge_mcast_own_query ip4_own_query;
dc4eb53a 281 struct bridge_mcast_querier ip4_querier;
cc0fdd80 282#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL
283 struct bridge_mcast_other_query ip6_other_query;
284 struct bridge_mcast_own_query ip6_own_query;
dc4eb53a 285 struct bridge_mcast_querier ip6_querier;
cc0fdd80 286#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX
287#endif
288
1da177e4
LT
289 struct timer_list hello_timer;
290 struct timer_list tcn_timer;
291 struct timer_list topology_change_timer;
292 struct timer_list gc_timer;
43b98c4a 293 struct kobject *ifobj;
e028e4b8 294 u32 auto_cnt;
243a2e63
VY
295#ifdef CONFIG_BRIDGE_VLAN_FILTERING
296 u8 vlan_enabled;
8580e211 297 __be16 vlan_proto;
96a20d9d 298 u16 default_pvid;
243a2e63
VY
299 struct net_port_vlans __rcu *vlan_info;
300#endif
1da177e4
LT
301};
302
68b7c895
HX
303struct br_input_skb_cb {
304 struct net_device *brdev;
93fdd47e 305
32dec5dd 306#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641
HX
307 int igmp;
308 int mrouters_only;
32dec5dd 309#endif
93fdd47e 310
842a9ae0 311 bool proxyarp_replied;
93fdd47e 312
20adfa1a
VY
313#ifdef CONFIG_BRIDGE_VLAN_FILTERING
314 bool vlan_filtered;
315#endif
68b7c895
HX
316};
317
318#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
319
32dec5dd
YH
320#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
321# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
322#else
323# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
324#endif
325
28a16c97 326#define br_printk(level, br, format, args...) \
327 printk(level "%s: " format, (br)->dev->name, ##args)
328
329#define br_err(__br, format, args...) \
330 br_printk(KERN_ERR, __br, format, ##args)
331#define br_warn(__br, format, args...) \
332 br_printk(KERN_WARNING, __br, format, ##args)
333#define br_notice(__br, format, args...) \
334 br_printk(KERN_NOTICE, __br, format, ##args)
335#define br_info(__br, format, args...) \
336 br_printk(KERN_INFO, __br, format, ##args)
337
338#define br_debug(br, format, args...) \
339 pr_debug("%s: " format, (br)->dev->name, ##args)
340
1da177e4
LT
341/* called under bridge lock */
342static inline int br_is_root_bridge(const struct net_bridge *br)
343{
344 return !memcmp(&br->bridge_id, &br->designated_root, 8);
345}
346
1da177e4 347/* br_device.c */
348662a1
JP
348void br_dev_setup(struct net_device *dev);
349void br_dev_delete(struct net_device *dev, struct list_head *list);
350netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
cfb478da 351#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a
HX
352static 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
a8779ec1 361int br_netpoll_enable(struct net_bridge_port *p);
348662a1 362void br_netpoll_disable(struct net_bridge_port *p);
cfb478da 363#else
9f70b0fc 364static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a
HX
365 struct sk_buff *skb)
366{
367}
cfb478da 368
a8779ec1 369static inline int br_netpoll_enable(struct net_bridge_port *p)
91d2c34a
HX
370{
371 return 0;
372}
373
374static inline void br_netpoll_disable(struct net_bridge_port *p)
375{
376}
cfb478da 377#endif
1da177e4
LT
378
379/* br_fdb.c */
348662a1
JP
380int br_fdb_init(void);
381void br_fdb_fini(void);
382void br_fdb_flush(struct net_bridge *br);
424bb9c9
TM
383void br_fdb_find_delete_local(struct net_bridge *br,
384 const struct net_bridge_port *p,
385 const unsigned char *addr, u16 vid);
348662a1
JP
386void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
387void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
388void br_fdb_cleanup(unsigned long arg);
389void br_fdb_delete_by_port(struct net_bridge *br,
1ea2d020 390 const struct net_bridge_port *p, u16 vid, int do_all);
348662a1
JP
391struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
392 const unsigned char *addr, __u16 vid);
393int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
394int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
395 unsigned long off);
396int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
397 const unsigned char *addr, u16 vid);
398void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
a5642ab4 399 const unsigned char *addr, u16 vid, bool added_by_user);
348662a1
JP
400
401int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
f6f6424b 402 struct net_device *dev, const unsigned char *addr, u16 vid);
348662a1 403int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
f6f6424b 404 const unsigned char *addr, u16 vid, u16 nlh_flags);
348662a1 405int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3 406 struct net_device *dev, struct net_device *fdev, int idx);
8db24af7
VY
407int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
408void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
3aeb6617
JP
409int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
410 const unsigned char *addr, u16 vid);
411int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
412 const unsigned char *addr, u16 vid);
1da177e4
LT
413
414/* br_forward.c */
348662a1 415void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
7026b1dd 416int br_dev_queue_push_xmit(struct sock *sk, struct sk_buff *skb);
348662a1 417void br_forward(const struct net_bridge_port *to,
7f7708f0 418 struct sk_buff *skb, struct sk_buff *skb0);
7026b1dd 419int br_forward_finish(struct sock *sk, struct sk_buff *skb);
348662a1
JP
420void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
421void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
422 struct sk_buff *skb2, bool unicast);
1da177e4
LT
423
424/* br_if.c */
348662a1
JP
425void br_port_carrier_check(struct net_bridge_port *p);
426int br_add_bridge(struct net *net, const char *name);
427int br_del_bridge(struct net *net, const char *name);
348662a1
JP
428int br_add_if(struct net_bridge *br, struct net_device *dev);
429int br_del_if(struct net_bridge *br, struct net_device *dev);
430int br_min_mtu(const struct net_bridge *br);
431netdev_features_t br_features_recompute(struct net_bridge *br,
432 netdev_features_t features);
e028e4b8 433void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
2796d0c6 434void br_manage_promisc(struct net_bridge *br);
1da177e4
LT
435
436/* br_input.c */
7026b1dd 437int br_handle_frame_finish(struct sock *sk, struct sk_buff *skb);
348662a1 438rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4 439
859828c0
JP
440static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
441{
442 return rcu_dereference(dev->rx_handler) == br_handle_frame;
443}
444
445static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
446{
447 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
448}
449
1da177e4 450/* br_ioctl.c */
348662a1
JP
451int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
452int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
453 void __user *arg);
1da177e4 454
eb1d1641
HX
455/* br_multicast.c */
456#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
2ce297fc 457extern unsigned int br_mdb_rehash_seq;
348662a1 458int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
394efd19 459 struct sk_buff *skb, u16 vid);
348662a1
JP
460struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
461 struct sk_buff *skb, u16 vid);
462void br_multicast_add_port(struct net_bridge_port *port);
463void br_multicast_del_port(struct net_bridge_port *port);
464void br_multicast_enable_port(struct net_bridge_port *port);
465void br_multicast_disable_port(struct net_bridge_port *port);
466void br_multicast_init(struct net_bridge *br);
467void br_multicast_open(struct net_bridge *br);
468void br_multicast_stop(struct net_bridge *br);
e10177ab 469void br_multicast_dev_del(struct net_bridge *br);
348662a1
JP
470void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
471 struct sk_buff *skb);
472void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
473 struct sk_buff *skb, struct sk_buff *skb2);
474int br_multicast_set_router(struct net_bridge *br, unsigned long val);
475int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
476int br_multicast_toggle(struct net_bridge *br, unsigned long val);
477int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
478int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
479struct net_bridge_mdb_entry *
480br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
481struct net_bridge_mdb_entry *
482br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
483 struct br_ip *group);
484void br_multicast_free_pg(struct rcu_head *head);
485struct net_bridge_port_group *
486br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
487 struct net_bridge_port_group __rcu *next,
488 unsigned char state);
489void br_mdb_init(void);
490void br_mdb_uninit(void);
491void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
09cf0211 492 struct br_ip *group, int type, u8 state);
85b35269 493
cfd56754
CW
494#define mlock_dereference(X, br) \
495 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
496
85b35269
SS
497static inline bool br_multicast_is_router(struct net_bridge *br)
498{
499 return br->multicast_router == 2 ||
500 (br->multicast_router == 1 &&
501 timer_pending(&br->multicast_router_timer));
502}
b00589af 503
cc0fdd80
LL
504static inline bool
505__br_multicast_querier_exists(struct net_bridge *br,
90010b36 506 struct bridge_mcast_other_query *querier)
b00589af 507{
cc0fdd80
LL
508 return time_is_before_jiffies(querier->delay_time) &&
509 (br->multicast_querier || timer_pending(&querier->timer));
510}
511
512static inline bool br_multicast_querier_exists(struct net_bridge *br,
513 struct ethhdr *eth)
514{
515 switch (eth->h_proto) {
516 case (htons(ETH_P_IP)):
90010b36 517 return __br_multicast_querier_exists(br, &br->ip4_other_query);
cc0fdd80
LL
518#if IS_ENABLED(CONFIG_IPV6)
519 case (htons(ETH_P_IPV6)):
90010b36 520 return __br_multicast_querier_exists(br, &br->ip6_other_query);
cc0fdd80
LL
521#endif
522 default:
523 return false;
524 }
b00589af 525}
eb1d1641
HX
526#else
527static inline int br_multicast_rcv(struct net_bridge *br,
528 struct net_bridge_port *port,
06499098
VY
529 struct sk_buff *skb,
530 u16 vid)
eb1d1641
HX
531{
532 return 0;
533}
534
535static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 536 struct sk_buff *skb, u16 vid)
eb1d1641
HX
537{
538 return NULL;
539}
540
541static inline void br_multicast_add_port(struct net_bridge_port *port)
542{
543}
544
545static inline void br_multicast_del_port(struct net_bridge_port *port)
546{
547}
548
549static inline void br_multicast_enable_port(struct net_bridge_port *port)
550{
551}
552
553static inline void br_multicast_disable_port(struct net_bridge_port *port)
554{
555}
556
557static inline void br_multicast_init(struct net_bridge *br)
558{
559}
560
561static inline void br_multicast_open(struct net_bridge *br)
562{
563}
564
565static inline void br_multicast_stop(struct net_bridge *br)
566{
567}
5cb5e947 568
a7ce45a7
NA
569static inline void br_multicast_dev_del(struct net_bridge *br)
570{
571}
572
5cb5e947
HX
573static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
574 struct sk_buff *skb)
575{
576}
577
578static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
579 struct sk_buff *skb,
580 struct sk_buff *skb2)
581{
582}
eb1d1641
HX
583static inline bool br_multicast_is_router(struct net_bridge *br)
584{
85b35269 585 return 0;
eb1d1641 586}
cc0fdd80
LL
587static inline bool br_multicast_querier_exists(struct net_bridge *br,
588 struct ethhdr *eth)
b00589af
LL
589{
590 return false;
591}
fdb184d1
RR
592static inline void br_mdb_init(void)
593{
594}
595static inline void br_mdb_uninit(void)
596{
597}
85b35269 598#endif
eb1d1641 599
243a2e63
VY
600/* br_vlan.c */
601#ifdef CONFIG_BRIDGE_VLAN_FILTERING
348662a1
JP
602bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
603 struct sk_buff *skb, u16 *vid);
604bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
605 const struct sk_buff *skb);
e0d7968a 606bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
348662a1
JP
607struct sk_buff *br_handle_vlan(struct net_bridge *br,
608 const struct net_port_vlans *v,
609 struct sk_buff *skb);
610int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
611int br_vlan_delete(struct net_bridge *br, u16 vid);
612void br_vlan_flush(struct net_bridge *br);
2b292fb4 613bool br_vlan_find(struct net_bridge *br, u16 vid);
204177f3 614void br_recalculate_fwd_mask(struct net_bridge *br);
348662a1 615int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
204177f3 616int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
5be5a2df 617int br_vlan_init(struct net_bridge *br);
96a20d9d 618int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
348662a1
JP
619int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
620int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
621void nbp_vlan_flush(struct net_bridge_port *port);
622bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
5be5a2df 623int nbp_vlan_init(struct net_bridge_port *port);
a37b85c9
VY
624
625static inline struct net_port_vlans *br_get_vlan_info(
626 const struct net_bridge *br)
627{
1690be63 628 return rcu_dereference_rtnl(br->vlan_info);
a37b85c9
VY
629}
630
631static inline struct net_port_vlans *nbp_get_vlan_info(
632 const struct net_bridge_port *p)
633{
1690be63 634 return rcu_dereference_rtnl(p->vlan_info);
a37b85c9
VY
635}
636
637/* Since bridge now depends on 8021Q module, but the time bridge sees the
638 * skb, the vlan tag will always be present if the frame was tagged.
639 */
640static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
641{
642 int err = 0;
643
df8a39de
JP
644 if (skb_vlan_tag_present(skb))
645 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
a37b85c9
VY
646 else {
647 *vid = 0;
648 err = -EINVAL;
649 }
650
651 return err;
652}
78851988
VY
653
654static inline u16 br_get_pvid(const struct net_port_vlans *v)
655{
5be5a2df
VY
656 if (!v)
657 return 0;
658
78851988 659 smp_rmb();
3df6bf45 660 return v->pvid;
78851988
VY
661}
662
2796d0c6
VY
663static inline int br_vlan_enabled(struct net_bridge *br)
664{
665 return br->vlan_enabled;
666}
243a2e63 667#else
a37b85c9
VY
668static inline bool br_allowed_ingress(struct net_bridge *br,
669 struct net_port_vlans *v,
78851988
VY
670 struct sk_buff *skb,
671 u16 *vid)
a37b85c9
VY
672{
673 return true;
674}
675
85f46c6b
VY
676static inline bool br_allowed_egress(struct net_bridge *br,
677 const struct net_port_vlans *v,
678 const struct sk_buff *skb)
679{
680 return true;
681}
682
e0d7968a
TM
683static inline bool br_should_learn(struct net_bridge_port *p,
684 struct sk_buff *skb, u16 *vid)
685{
686 return true;
687}
688
78851988
VY
689static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
690 const struct net_port_vlans *v,
691 struct sk_buff *skb)
692{
693 return skb;
694}
695
552406c4 696static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63
VY
697{
698 return -EOPNOTSUPP;
699}
700
701static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
702{
703 return -EOPNOTSUPP;
704}
705
706static inline void br_vlan_flush(struct net_bridge *br)
707{
708}
709
2b292fb4
TM
710static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
711{
712 return false;
713}
714
204177f3
TM
715static inline void br_recalculate_fwd_mask(struct net_bridge *br)
716{
717}
718
5be5a2df 719static inline int br_vlan_init(struct net_bridge *br)
8580e211 720{
5be5a2df 721 return 0;
8580e211
TM
722}
723
552406c4 724static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63
VY
725{
726 return -EOPNOTSUPP;
727}
728
729static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
730{
731 return -EOPNOTSUPP;
732}
733
734static inline void nbp_vlan_flush(struct net_bridge_port *port)
735{
736}
737
a37b85c9
VY
738static inline struct net_port_vlans *br_get_vlan_info(
739 const struct net_bridge *br)
740{
741 return NULL;
742}
743static inline struct net_port_vlans *nbp_get_vlan_info(
744 const struct net_bridge_port *p)
745{
746 return NULL;
747}
748
bc9a25d2
VY
749static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
750{
751 return false;
752}
753
5be5a2df
VY
754static inline int nbp_vlan_init(struct net_bridge_port *port)
755{
756 return 0;
757}
758
78851988 759static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
a37b85c9
VY
760{
761 return 0;
762}
78851988
VY
763static inline u16 br_get_pvid(const struct net_port_vlans *v)
764{
3df6bf45 765 return 0;
78851988 766}
2796d0c6 767
d4f0e095 768static inline int br_vlan_enabled(struct net_bridge *br)
2796d0c6
VY
769{
770 return 0;
771}
243a2e63
VY
772#endif
773
1a4ba64d
PNA
774struct nf_br_ops {
775 int (*br_dev_xmit_hook)(struct sk_buff *skb);
776};
777extern const struct nf_br_ops __rcu *nf_br_ops;
778
1da177e4 779/* br_netfilter.c */
34666d46
PNA
780#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
781int br_nf_core_init(void);
782void br_nf_core_fini(void);
348662a1 783void br_netfilter_rtable_init(struct net_bridge *);
c0909713 784#else
34666d46
PNA
785static inline int br_nf_core_init(void) { return 0; }
786static inline void br_nf_core_fini(void) {}
4adf0af6 787#define br_netfilter_rtable_init(x)
c0909713 788#endif
1da177e4
LT
789
790/* br_stp.c */
348662a1 791void br_log_state(const struct net_bridge_port *p);
775dd692 792void br_set_state(struct net_bridge_port *p, unsigned int state);
348662a1
JP
793struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
794void br_init_port(struct net_bridge_port *p);
795void br_become_designated_port(struct net_bridge_port *p);
1da177e4 796
348662a1
JP
797void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
798int br_set_forward_delay(struct net_bridge *br, unsigned long x);
799int br_set_hello_time(struct net_bridge *br, unsigned long x);
800int br_set_max_age(struct net_bridge *br, unsigned long x);
14f98f25 801
802
1da177e4 803/* br_stp_if.c */
348662a1
JP
804void br_stp_enable_bridge(struct net_bridge *br);
805void br_stp_disable_bridge(struct net_bridge *br);
806void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
807void br_stp_enable_port(struct net_bridge_port *p);
808void br_stp_disable_port(struct net_bridge_port *p);
809bool br_stp_recalculate_bridge_id(struct net_bridge *br);
810void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
811void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
812int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
813int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
814ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1da177e4
LT
815
816/* br_stp_bpdu.c */
7c85fbf0 817struct stp_proto;
348662a1
JP
818void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
819 struct net_device *dev);
1da177e4
LT
820
821/* br_stp_timer.c */
348662a1
JP
822void br_stp_timer_init(struct net_bridge *br);
823void br_stp_port_timer_init(struct net_bridge_port *p);
824unsigned long br_timer_value(const struct timer_list *timer);
1da177e4
LT
825
826/* br.c */
e6373c4c 827#if IS_ENABLED(CONFIG_ATM_LANE)
da678292
MM
828extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
829#endif
1da177e4 830
11dc1f36 831/* br_netlink.c */
149ddd83 832extern struct rtnl_link_ops br_link_ops;
348662a1
JP
833int br_netlink_init(void);
834void br_netlink_fini(void);
835void br_ifinfo_notify(int event, struct net_bridge_port *port);
add511b3
RP
836int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
837int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
348662a1 838int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
46c264da 839 u32 filter_mask, int nlflags);
11dc1f36 840
1da177e4
LT
841#ifdef CONFIG_SYSFS
842/* br_sysfs_if.c */
52cf25d0 843extern const struct sysfs_ops brport_sysfs_ops;
348662a1
JP
844int br_sysfs_addif(struct net_bridge_port *p);
845int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4
LT
846
847/* br_sysfs_br.c */
348662a1
JP
848int br_sysfs_addbr(struct net_device *dev);
849void br_sysfs_delbr(struct net_device *dev);
1da177e4
LT
850
851#else
852
0cb2bbbe
LJ
853static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
854static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
855static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
856static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1da177e4
LT
857#endif /* CONFIG_SYSFS */
858
859#endif