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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);
469void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
470 struct sk_buff *skb);
471void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
472 struct sk_buff *skb, struct sk_buff *skb2);
473int br_multicast_set_router(struct net_bridge *br, unsigned long val);
474int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
475int br_multicast_toggle(struct net_bridge *br, unsigned long val);
476int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
477int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
478struct net_bridge_mdb_entry *
479br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
480struct net_bridge_mdb_entry *
481br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
482 struct br_ip *group);
483void br_multicast_free_pg(struct rcu_head *head);
484struct net_bridge_port_group *
485br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
486 struct net_bridge_port_group __rcu *next,
487 unsigned char state);
488void br_mdb_init(void);
489void br_mdb_uninit(void);
490void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
09cf0211 491 struct br_ip *group, int type, u8 state);
85b35269 492
cfd56754
CW
493#define mlock_dereference(X, br) \
494 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
495
85b35269
SS
496static inline bool br_multicast_is_router(struct net_bridge *br)
497{
498 return br->multicast_router == 2 ||
499 (br->multicast_router == 1 &&
500 timer_pending(&br->multicast_router_timer));
501}
b00589af 502
cc0fdd80
LL
503static inline bool
504__br_multicast_querier_exists(struct net_bridge *br,
90010b36 505 struct bridge_mcast_other_query *querier)
b00589af 506{
cc0fdd80
LL
507 return time_is_before_jiffies(querier->delay_time) &&
508 (br->multicast_querier || timer_pending(&querier->timer));
509}
510
511static inline bool br_multicast_querier_exists(struct net_bridge *br,
512 struct ethhdr *eth)
513{
514 switch (eth->h_proto) {
515 case (htons(ETH_P_IP)):
90010b36 516 return __br_multicast_querier_exists(br, &br->ip4_other_query);
cc0fdd80
LL
517#if IS_ENABLED(CONFIG_IPV6)
518 case (htons(ETH_P_IPV6)):
90010b36 519 return __br_multicast_querier_exists(br, &br->ip6_other_query);
cc0fdd80
LL
520#endif
521 default:
522 return false;
523 }
b00589af 524}
eb1d1641
HX
525#else
526static inline int br_multicast_rcv(struct net_bridge *br,
527 struct net_bridge_port *port,
06499098
VY
528 struct sk_buff *skb,
529 u16 vid)
eb1d1641
HX
530{
531 return 0;
532}
533
534static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 535 struct sk_buff *skb, u16 vid)
eb1d1641
HX
536{
537 return NULL;
538}
539
540static inline void br_multicast_add_port(struct net_bridge_port *port)
541{
542}
543
544static inline void br_multicast_del_port(struct net_bridge_port *port)
545{
546}
547
548static inline void br_multicast_enable_port(struct net_bridge_port *port)
549{
550}
551
552static inline void br_multicast_disable_port(struct net_bridge_port *port)
553{
554}
555
556static inline void br_multicast_init(struct net_bridge *br)
557{
558}
559
560static inline void br_multicast_open(struct net_bridge *br)
561{
562}
563
564static inline void br_multicast_stop(struct net_bridge *br)
565{
566}
5cb5e947
HX
567
568static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
569 struct sk_buff *skb)
570{
571}
572
573static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
574 struct sk_buff *skb,
575 struct sk_buff *skb2)
576{
577}
eb1d1641
HX
578static inline bool br_multicast_is_router(struct net_bridge *br)
579{
85b35269 580 return 0;
eb1d1641 581}
cc0fdd80
LL
582static inline bool br_multicast_querier_exists(struct net_bridge *br,
583 struct ethhdr *eth)
b00589af
LL
584{
585 return false;
586}
fdb184d1
RR
587static inline void br_mdb_init(void)
588{
589}
590static inline void br_mdb_uninit(void)
591{
592}
85b35269 593#endif
eb1d1641 594
243a2e63
VY
595/* br_vlan.c */
596#ifdef CONFIG_BRIDGE_VLAN_FILTERING
348662a1
JP
597bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
598 struct sk_buff *skb, u16 *vid);
599bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
600 const struct sk_buff *skb);
e0d7968a 601bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
348662a1
JP
602struct sk_buff *br_handle_vlan(struct net_bridge *br,
603 const struct net_port_vlans *v,
604 struct sk_buff *skb);
605int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
606int br_vlan_delete(struct net_bridge *br, u16 vid);
607void br_vlan_flush(struct net_bridge *br);
2b292fb4 608bool br_vlan_find(struct net_bridge *br, u16 vid);
204177f3 609void br_recalculate_fwd_mask(struct net_bridge *br);
348662a1 610int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
204177f3 611int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
5be5a2df 612int br_vlan_init(struct net_bridge *br);
96a20d9d 613int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
348662a1
JP
614int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
615int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
616void nbp_vlan_flush(struct net_bridge_port *port);
617bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
5be5a2df 618int nbp_vlan_init(struct net_bridge_port *port);
a37b85c9
VY
619
620static inline struct net_port_vlans *br_get_vlan_info(
621 const struct net_bridge *br)
622{
1690be63 623 return rcu_dereference_rtnl(br->vlan_info);
a37b85c9
VY
624}
625
626static inline struct net_port_vlans *nbp_get_vlan_info(
627 const struct net_bridge_port *p)
628{
1690be63 629 return rcu_dereference_rtnl(p->vlan_info);
a37b85c9
VY
630}
631
632/* Since bridge now depends on 8021Q module, but the time bridge sees the
633 * skb, the vlan tag will always be present if the frame was tagged.
634 */
635static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
636{
637 int err = 0;
638
df8a39de
JP
639 if (skb_vlan_tag_present(skb))
640 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
a37b85c9
VY
641 else {
642 *vid = 0;
643 err = -EINVAL;
644 }
645
646 return err;
647}
78851988
VY
648
649static inline u16 br_get_pvid(const struct net_port_vlans *v)
650{
5be5a2df
VY
651 if (!v)
652 return 0;
653
78851988 654 smp_rmb();
3df6bf45 655 return v->pvid;
78851988
VY
656}
657
2796d0c6
VY
658static inline int br_vlan_enabled(struct net_bridge *br)
659{
660 return br->vlan_enabled;
661}
243a2e63 662#else
a37b85c9
VY
663static inline bool br_allowed_ingress(struct net_bridge *br,
664 struct net_port_vlans *v,
78851988
VY
665 struct sk_buff *skb,
666 u16 *vid)
a37b85c9
VY
667{
668 return true;
669}
670
85f46c6b
VY
671static inline bool br_allowed_egress(struct net_bridge *br,
672 const struct net_port_vlans *v,
673 const struct sk_buff *skb)
674{
675 return true;
676}
677
e0d7968a
TM
678static inline bool br_should_learn(struct net_bridge_port *p,
679 struct sk_buff *skb, u16 *vid)
680{
681 return true;
682}
683
78851988
VY
684static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
685 const struct net_port_vlans *v,
686 struct sk_buff *skb)
687{
688 return skb;
689}
690
552406c4 691static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63
VY
692{
693 return -EOPNOTSUPP;
694}
695
696static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
697{
698 return -EOPNOTSUPP;
699}
700
701static inline void br_vlan_flush(struct net_bridge *br)
702{
703}
704
2b292fb4
TM
705static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
706{
707 return false;
708}
709
204177f3
TM
710static inline void br_recalculate_fwd_mask(struct net_bridge *br)
711{
712}
713
5be5a2df 714static inline int br_vlan_init(struct net_bridge *br)
8580e211 715{
5be5a2df 716 return 0;
8580e211
TM
717}
718
552406c4 719static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63
VY
720{
721 return -EOPNOTSUPP;
722}
723
724static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
725{
726 return -EOPNOTSUPP;
727}
728
729static inline void nbp_vlan_flush(struct net_bridge_port *port)
730{
731}
732
a37b85c9
VY
733static inline struct net_port_vlans *br_get_vlan_info(
734 const struct net_bridge *br)
735{
736 return NULL;
737}
738static inline struct net_port_vlans *nbp_get_vlan_info(
739 const struct net_bridge_port *p)
740{
741 return NULL;
742}
743
bc9a25d2
VY
744static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
745{
746 return false;
747}
748
5be5a2df
VY
749static inline int nbp_vlan_init(struct net_bridge_port *port)
750{
751 return 0;
752}
753
78851988 754static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
a37b85c9
VY
755{
756 return 0;
757}
78851988
VY
758static inline u16 br_get_pvid(const struct net_port_vlans *v)
759{
3df6bf45 760 return 0;
78851988 761}
2796d0c6 762
d4f0e095 763static inline int br_vlan_enabled(struct net_bridge *br)
2796d0c6
VY
764{
765 return 0;
766}
243a2e63
VY
767#endif
768
1a4ba64d
PNA
769struct nf_br_ops {
770 int (*br_dev_xmit_hook)(struct sk_buff *skb);
771};
772extern const struct nf_br_ops __rcu *nf_br_ops;
773
1da177e4 774/* br_netfilter.c */
34666d46
PNA
775#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
776int br_nf_core_init(void);
777void br_nf_core_fini(void);
348662a1 778void br_netfilter_rtable_init(struct net_bridge *);
c0909713 779#else
34666d46
PNA
780static inline int br_nf_core_init(void) { return 0; }
781static inline void br_nf_core_fini(void) {}
4adf0af6 782#define br_netfilter_rtable_init(x)
c0909713 783#endif
1da177e4
LT
784
785/* br_stp.c */
348662a1 786void br_log_state(const struct net_bridge_port *p);
775dd692 787void br_set_state(struct net_bridge_port *p, unsigned int state);
348662a1
JP
788struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
789void br_init_port(struct net_bridge_port *p);
790void br_become_designated_port(struct net_bridge_port *p);
1da177e4 791
348662a1
JP
792void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
793int br_set_forward_delay(struct net_bridge *br, unsigned long x);
794int br_set_hello_time(struct net_bridge *br, unsigned long x);
795int br_set_max_age(struct net_bridge *br, unsigned long x);
14f98f25 796
797
1da177e4 798/* br_stp_if.c */
348662a1
JP
799void br_stp_enable_bridge(struct net_bridge *br);
800void br_stp_disable_bridge(struct net_bridge *br);
801void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
802void br_stp_enable_port(struct net_bridge_port *p);
803void br_stp_disable_port(struct net_bridge_port *p);
804bool br_stp_recalculate_bridge_id(struct net_bridge *br);
805void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
806void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
807int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
808int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
809ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1da177e4
LT
810
811/* br_stp_bpdu.c */
7c85fbf0 812struct stp_proto;
348662a1
JP
813void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
814 struct net_device *dev);
1da177e4
LT
815
816/* br_stp_timer.c */
348662a1
JP
817void br_stp_timer_init(struct net_bridge *br);
818void br_stp_port_timer_init(struct net_bridge_port *p);
819unsigned long br_timer_value(const struct timer_list *timer);
1da177e4
LT
820
821/* br.c */
e6373c4c 822#if IS_ENABLED(CONFIG_ATM_LANE)
da678292
MM
823extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
824#endif
1da177e4 825
11dc1f36 826/* br_netlink.c */
149ddd83 827extern struct rtnl_link_ops br_link_ops;
348662a1
JP
828int br_netlink_init(void);
829void br_netlink_fini(void);
830void br_ifinfo_notify(int event, struct net_bridge_port *port);
add511b3
RP
831int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
832int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
348662a1 833int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
46c264da 834 u32 filter_mask, int nlflags);
11dc1f36 835
1da177e4
LT
836#ifdef CONFIG_SYSFS
837/* br_sysfs_if.c */
52cf25d0 838extern const struct sysfs_ops brport_sysfs_ops;
348662a1
JP
839int br_sysfs_addif(struct net_bridge_port *p);
840int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4
LT
841
842/* br_sysfs_br.c */
348662a1
JP
843int br_sysfs_addbr(struct net_device *dev);
844void br_sysfs_delbr(struct net_device *dev);
1da177e4
LT
845
846#else
847
0cb2bbbe
LJ
848static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
849static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
850static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
851static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1da177e4
LT
852#endif /* CONFIG_SYSFS */
853
854#endif