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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>
243a2e63 21#include <linux/if_vlan.h>
1da177e4
LT
22
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)
243a2e63 30#define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
1da177e4 31
9cde0708
SH
32#define BR_VERSION "2.3"
33
515853cc 34/* 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
f2808d22
TM
38/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
39#define BR_GROUPFWD_8021AD 0xB801u
515853cc 40
9cde0708
SH
41/* Path to usermode spanning tree program */
42#define BR_STP_PROG "/sbin/bridge-stp"
8cbb512e 43
1da177e4
LT
44typedef 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];
e5a727f6 51 unsigned char addr[ETH_ALEN];
1da177e4
LT
52};
53
54struct mac_addr
55{
e5a727f6 56 unsigned char addr[ETH_ALEN];
1da177e4
LT
57};
58
cc0fdd80
LL
59#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
60/* our own querier */
90010b36 61struct bridge_mcast_own_query {
cc0fdd80
LL
62 struct timer_list timer;
63 u32 startup_sent;
64};
65
66/* other querier */
90010b36 67struct bridge_mcast_other_query {
cc0fdd80
LL
68 struct timer_list timer;
69 unsigned long delay_time;
70};
dc4eb53a
LL
71
72/* selected querier */
73struct bridge_mcast_querier {
74 struct br_ip addr;
2cd41431 75 struct net_bridge_port __rcu *port;
dc4eb53a 76};
cc0fdd80
LL
77#endif
78
243a2e63
VY
79struct net_port_vlans {
80 u16 port_idx;
78851988 81 u16 pvid;
243a2e63
VY
82 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];
35e03f3a 88 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
6cbdceeb 89 u16 num_vlans;
243a2e63
VY
90};
91
1da177e4
LT
92struct net_bridge_fdb_entry
93{
94 struct hlist_node hlist;
95 struct net_bridge_port *dst;
96
97 struct rcu_head rcu;
7cd8861a 98 unsigned long updated;
99 unsigned long used;
1da177e4
LT
100 mac_addr addr;
101 unsigned char is_local;
102 unsigned char is_static;
a5642ab4 103 unsigned char added_by_user;
2ba071ec 104 __u16 vlan_id;
1da177e4
LT
105};
106
eb1d1641
HX
107struct net_bridge_port_group {
108 struct net_bridge_port *port;
e8051688 109 struct net_bridge_port_group __rcu *next;
eb1d1641
HX
110 struct hlist_node mglist;
111 struct rcu_head rcu;
112 struct timer_list timer;
8ef2a9a5 113 struct br_ip addr;
ccb1c31a 114 unsigned char state;
eb1d1641
HX
115};
116
117struct net_bridge_mdb_entry
118{
119 struct hlist_node hlist[2];
eb1d1641 120 struct net_bridge *br;
e8051688 121 struct net_bridge_port_group __rcu *ports;
eb1d1641
HX
122 struct rcu_head rcu;
123 struct timer_list timer;
8ef2a9a5 124 struct br_ip addr;
8a870178 125 bool mglist;
eb1d1641
HX
126};
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
1da177e4
LT
139struct 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;
0c03150e 157 unsigned long designated_age;
1da177e4
LT
158
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;
3982d3d2
FA
164
165 unsigned long flags;
166#define BR_HAIRPIN_MODE 0x00000001
a2e01a65 167#define BR_BPDU_GUARD 0x00000002
1007dd1a 168#define BR_ROOT_BLOCK 0x00000004
c2d3babf 169#define BR_MULTICAST_FAST_LEAVE 0x00000008
8f3359bd 170#define BR_ADMIN_COST 0x00000010
9ba18891 171#define BR_LEARNING 0x00000020
867a5943 172#define BR_FLOOD 0x00000040
e028e4b8 173#define BR_AUTO_MASK (BR_FLOOD | BR_LEARNING)
f3a6ddf1 174#define BR_PROMISC 0x00000080
eb1d1641
HX
175
176#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
90010b36 177 struct bridge_mcast_own_query ip4_own_query;
cc0fdd80 178#if IS_ENABLED(CONFIG_IPV6)
90010b36 179 struct bridge_mcast_own_query ip6_own_query;
cc0fdd80 180#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX
181 unsigned char multicast_router;
182 struct timer_list multicast_router_timer;
eb1d1641
HX
183 struct hlist_head mglist;
184 struct hlist_node rlist;
185#endif
e0f43752
SA
186
187#ifdef CONFIG_SYSFS
188 char sysfs_name[IFNAMSIZ];
189#endif
91d2c34a
HX
190
191#ifdef CONFIG_NET_POLL_CONTROLLER
192 struct netpoll *np;
193#endif
243a2e63
VY
194#ifdef CONFIG_BRIDGE_VLAN_FILTERING
195 struct net_port_vlans __rcu *vlan_info;
196#endif
1da177e4
LT
197};
198
e028e4b8 199#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
f3a6ddf1 200#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
e028e4b8 201
f350a0a8
JP
202#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
203
b5ed54e9 204static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
205{
716ec052 206 return rcu_dereference(dev->rx_handler_data);
b5ed54e9 207}
208
1fb1754a 209static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
b5ed54e9 210{
ec1e5610
ED
211 return br_port_exists(dev) ?
212 rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9 213}
214
1da177e4
LT
215struct net_bridge
216{
217 spinlock_t lock;
218 struct list_head port_list;
219 struct net_device *dev;
14bb4789 220
8f84985f 221 struct pcpu_sw_netstats __percpu *stats;
1da177e4
LT
222 spinlock_t hash_lock;
223 struct hlist_head hash[BR_HASH_SIZE];
34666d46 224#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
4adf0af6 225 struct rtable fake_rtable;
4df53d8b
PM
226 bool nf_call_iptables;
227 bool nf_call_ip6tables;
228 bool nf_call_arptables;
4adf0af6 229#endif
515853cc 230 u16 group_fwd_mask;
f2808d22 231 u16 group_fwd_mask_required;
515853cc 232
1da177e4
LT
233 /* 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
fda93d92 245 u8 group_addr[ETH_ALEN];
204177f3 246 bool group_addr_set;
1da177e4 247 u16 root_port;
9cde0708
SH
248
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
1da177e4
LT
255 unsigned char topology_change;
256 unsigned char topology_change_detected;
257
eb1d1641
HX
258#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
259 unsigned char multicast_router;
260
261 u8 multicast_disabled:1;
c5c23260 262 u8 multicast_querier:1;
1c8ad5bf 263 u8 multicast_query_use_ifaddr:1;
eb1d1641
HX
264
265 u32 hash_elasticity;
266 u32 hash_max;
267
268 u32 multicast_last_member_count;
eb1d1641
HX
269 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;
e8051688 279 struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641 280 struct hlist_head router_list;
eb1d1641
HX
281
282 struct timer_list multicast_router_timer;
90010b36
LL
283 struct bridge_mcast_other_query ip4_other_query;
284 struct bridge_mcast_own_query ip4_own_query;
dc4eb53a 285 struct bridge_mcast_querier ip4_querier;
cc0fdd80 286#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL
287 struct bridge_mcast_other_query ip6_other_query;
288 struct bridge_mcast_own_query ip6_own_query;
dc4eb53a 289 struct bridge_mcast_querier ip6_querier;
cc0fdd80 290#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX
291#endif
292
1da177e4
LT
293 struct timer_list hello_timer;
294 struct timer_list tcn_timer;
295 struct timer_list topology_change_timer;
296 struct timer_list gc_timer;
43b98c4a 297 struct kobject *ifobj;
e028e4b8 298 u32 auto_cnt;
243a2e63
VY
299#ifdef CONFIG_BRIDGE_VLAN_FILTERING
300 u8 vlan_enabled;
8580e211 301 __be16 vlan_proto;
243a2e63
VY
302 struct net_port_vlans __rcu *vlan_info;
303#endif
1da177e4
LT
304};
305
68b7c895
HX
306struct br_input_skb_cb {
307 struct net_device *brdev;
32dec5dd 308#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641
HX
309 int igmp;
310 int mrouters_only;
32dec5dd 311#endif
20adfa1a
VY
312#ifdef CONFIG_BRIDGE_VLAN_FILTERING
313 bool vlan_filtered;
314#endif
68b7c895
HX
315};
316
317#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
318
32dec5dd
YH
319#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
320# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
321#else
322# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
323#endif
324
28a16c97 325#define br_printk(level, br, format, args...) \
326 printk(level "%s: " format, (br)->dev->name, ##args)
327
328#define br_err(__br, format, args...) \
329 br_printk(KERN_ERR, __br, format, ##args)
330#define br_warn(__br, format, args...) \
331 br_printk(KERN_WARNING, __br, format, ##args)
332#define br_notice(__br, format, args...) \
333 br_printk(KERN_NOTICE, __br, format, ##args)
334#define br_info(__br, format, args...) \
335 br_printk(KERN_INFO, __br, format, ##args)
336
337#define br_debug(br, format, args...) \
338 pr_debug("%s: " format, (br)->dev->name, ##args)
339
1da177e4
LT
340/* called under bridge lock */
341static inline int br_is_root_bridge(const struct net_bridge *br)
342{
343 return !memcmp(&br->bridge_id, &br->designated_root, 8);
344}
345
1da177e4 346/* br_device.c */
348662a1
JP
347void br_dev_setup(struct net_device *dev);
348void br_dev_delete(struct net_device *dev, struct list_head *list);
349netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
cfb478da 350#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a
HX
351static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
352 struct sk_buff *skb)
353{
354 struct netpoll *np = p->np;
355
356 if (np)
357 netpoll_send_skb(np, skb);
358}
359
a8779ec1 360int br_netpoll_enable(struct net_bridge_port *p);
348662a1 361void br_netpoll_disable(struct net_bridge_port *p);
cfb478da 362#else
9f70b0fc 363static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a
HX
364 struct sk_buff *skb)
365{
366}
cfb478da 367
a8779ec1 368static inline int br_netpoll_enable(struct net_bridge_port *p)
91d2c34a
HX
369{
370 return 0;
371}
372
373static inline void br_netpoll_disable(struct net_bridge_port *p)
374{
375}
cfb478da 376#endif
1da177e4
LT
377
378/* br_fdb.c */
348662a1
JP
379int br_fdb_init(void);
380void br_fdb_fini(void);
381void br_fdb_flush(struct net_bridge *br);
424bb9c9
TM
382void br_fdb_find_delete_local(struct net_bridge *br,
383 const struct net_bridge_port *p,
384 const unsigned char *addr, u16 vid);
348662a1
JP
385void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
386void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
387void br_fdb_cleanup(unsigned long arg);
388void br_fdb_delete_by_port(struct net_bridge *br,
389 const struct net_bridge_port *p, int do_all);
390struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
391 const unsigned char *addr, __u16 vid);
392int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
393int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
394 unsigned long off);
395int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
396 const unsigned char *addr, u16 vid);
397void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
a5642ab4 398 const unsigned char *addr, u16 vid, bool added_by_user);
348662a1
JP
399
400int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
401 struct net_device *dev, const unsigned char *addr);
402int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
403 const unsigned char *addr, u16 nlh_flags);
404int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3 405 struct net_device *dev, struct net_device *fdev, int idx);
8db24af7
VY
406int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
407void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
1da177e4
LT
408
409/* br_forward.c */
348662a1
JP
410void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
411int br_dev_queue_push_xmit(struct sk_buff *skb);
412void br_forward(const struct net_bridge_port *to,
7f7708f0 413 struct sk_buff *skb, struct sk_buff *skb0);
348662a1
JP
414int br_forward_finish(struct sk_buff *skb);
415void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
416void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
417 struct sk_buff *skb2, bool unicast);
1da177e4
LT
418
419/* br_if.c */
348662a1
JP
420void br_port_carrier_check(struct net_bridge_port *p);
421int br_add_bridge(struct net *net, const char *name);
422int br_del_bridge(struct net *net, const char *name);
348662a1
JP
423int br_add_if(struct net_bridge *br, struct net_device *dev);
424int br_del_if(struct net_bridge *br, struct net_device *dev);
425int br_min_mtu(const struct net_bridge *br);
426netdev_features_t br_features_recompute(struct net_bridge *br,
427 netdev_features_t features);
e028e4b8 428void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
2796d0c6 429void br_manage_promisc(struct net_bridge *br);
1da177e4
LT
430
431/* br_input.c */
348662a1
JP
432int br_handle_frame_finish(struct sk_buff *skb);
433rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4 434
859828c0
JP
435static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
436{
437 return rcu_dereference(dev->rx_handler) == br_handle_frame;
438}
439
440static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
441{
442 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
443}
444
1da177e4 445/* br_ioctl.c */
348662a1
JP
446int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
447int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
448 void __user *arg);
1da177e4 449
eb1d1641
HX
450/* br_multicast.c */
451#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
2ce297fc 452extern unsigned int br_mdb_rehash_seq;
348662a1 453int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
394efd19 454 struct sk_buff *skb, u16 vid);
348662a1
JP
455struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
456 struct sk_buff *skb, u16 vid);
457void br_multicast_add_port(struct net_bridge_port *port);
458void br_multicast_del_port(struct net_bridge_port *port);
459void br_multicast_enable_port(struct net_bridge_port *port);
460void br_multicast_disable_port(struct net_bridge_port *port);
461void br_multicast_init(struct net_bridge *br);
462void br_multicast_open(struct net_bridge *br);
463void br_multicast_stop(struct net_bridge *br);
464void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
465 struct sk_buff *skb);
466void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
467 struct sk_buff *skb, struct sk_buff *skb2);
468int br_multicast_set_router(struct net_bridge *br, unsigned long val);
469int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
470int br_multicast_toggle(struct net_bridge *br, unsigned long val);
471int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
472int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
473struct net_bridge_mdb_entry *
474br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
475struct net_bridge_mdb_entry *
476br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
477 struct br_ip *group);
478void br_multicast_free_pg(struct rcu_head *head);
479struct net_bridge_port_group *
480br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
481 struct net_bridge_port_group __rcu *next,
482 unsigned char state);
483void br_mdb_init(void);
484void br_mdb_uninit(void);
485void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
486 struct br_ip *group, int type);
85b35269 487
cfd56754
CW
488#define mlock_dereference(X, br) \
489 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
490
85b35269
SS
491static inline bool br_multicast_is_router(struct net_bridge *br)
492{
493 return br->multicast_router == 2 ||
494 (br->multicast_router == 1 &&
495 timer_pending(&br->multicast_router_timer));
496}
b00589af 497
cc0fdd80
LL
498static inline bool
499__br_multicast_querier_exists(struct net_bridge *br,
90010b36 500 struct bridge_mcast_other_query *querier)
b00589af 501{
cc0fdd80
LL
502 return time_is_before_jiffies(querier->delay_time) &&
503 (br->multicast_querier || timer_pending(&querier->timer));
504}
505
506static inline bool br_multicast_querier_exists(struct net_bridge *br,
507 struct ethhdr *eth)
508{
509 switch (eth->h_proto) {
510 case (htons(ETH_P_IP)):
90010b36 511 return __br_multicast_querier_exists(br, &br->ip4_other_query);
cc0fdd80
LL
512#if IS_ENABLED(CONFIG_IPV6)
513 case (htons(ETH_P_IPV6)):
90010b36 514 return __br_multicast_querier_exists(br, &br->ip6_other_query);
cc0fdd80
LL
515#endif
516 default:
517 return false;
518 }
b00589af 519}
eb1d1641
HX
520#else
521static inline int br_multicast_rcv(struct net_bridge *br,
522 struct net_bridge_port *port,
06499098
VY
523 struct sk_buff *skb,
524 u16 vid)
eb1d1641
HX
525{
526 return 0;
527}
528
529static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 530 struct sk_buff *skb, u16 vid)
eb1d1641
HX
531{
532 return NULL;
533}
534
535static inline void br_multicast_add_port(struct net_bridge_port *port)
536{
537}
538
539static inline void br_multicast_del_port(struct net_bridge_port *port)
540{
541}
542
543static inline void br_multicast_enable_port(struct net_bridge_port *port)
544{
545}
546
547static inline void br_multicast_disable_port(struct net_bridge_port *port)
548{
549}
550
551static inline void br_multicast_init(struct net_bridge *br)
552{
553}
554
555static inline void br_multicast_open(struct net_bridge *br)
556{
557}
558
559static inline void br_multicast_stop(struct net_bridge *br)
560{
561}
5cb5e947
HX
562
563static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
564 struct sk_buff *skb)
565{
566}
567
568static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
569 struct sk_buff *skb,
570 struct sk_buff *skb2)
571{
572}
eb1d1641
HX
573static inline bool br_multicast_is_router(struct net_bridge *br)
574{
85b35269 575 return 0;
eb1d1641 576}
cc0fdd80
LL
577static inline bool br_multicast_querier_exists(struct net_bridge *br,
578 struct ethhdr *eth)
b00589af
LL
579{
580 return false;
581}
fdb184d1
RR
582static inline void br_mdb_init(void)
583{
584}
585static inline void br_mdb_uninit(void)
586{
587}
85b35269 588#endif
eb1d1641 589
243a2e63
VY
590/* br_vlan.c */
591#ifdef CONFIG_BRIDGE_VLAN_FILTERING
348662a1
JP
592bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
593 struct sk_buff *skb, u16 *vid);
594bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
595 const struct sk_buff *skb);
e0d7968a 596bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
348662a1
JP
597struct sk_buff *br_handle_vlan(struct net_bridge *br,
598 const struct net_port_vlans *v,
599 struct sk_buff *skb);
600int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
601int br_vlan_delete(struct net_bridge *br, u16 vid);
602void br_vlan_flush(struct net_bridge *br);
2b292fb4 603bool br_vlan_find(struct net_bridge *br, u16 vid);
204177f3 604void br_recalculate_fwd_mask(struct net_bridge *br);
348662a1 605int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
204177f3 606int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
8580e211 607void br_vlan_init(struct net_bridge *br);
348662a1
JP
608int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
609int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
610void nbp_vlan_flush(struct net_bridge_port *port);
611bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
a37b85c9
VY
612
613static inline struct net_port_vlans *br_get_vlan_info(
614 const struct net_bridge *br)
615{
1690be63 616 return rcu_dereference_rtnl(br->vlan_info);
a37b85c9
VY
617}
618
619static inline struct net_port_vlans *nbp_get_vlan_info(
620 const struct net_bridge_port *p)
621{
1690be63 622 return rcu_dereference_rtnl(p->vlan_info);
a37b85c9
VY
623}
624
625/* Since bridge now depends on 8021Q module, but the time bridge sees the
626 * skb, the vlan tag will always be present if the frame was tagged.
627 */
628static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
629{
630 int err = 0;
631
632 if (vlan_tx_tag_present(skb))
633 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
634 else {
635 *vid = 0;
636 err = -EINVAL;
637 }
638
639 return err;
640}
78851988
VY
641
642static inline u16 br_get_pvid(const struct net_port_vlans *v)
643{
644 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
645 * vid wasn't set
646 */
647 smp_rmb();
d1c6c708 648 return v->pvid ?: VLAN_N_VID;
78851988
VY
649}
650
2796d0c6
VY
651static inline int br_vlan_enabled(struct net_bridge *br)
652{
653 return br->vlan_enabled;
654}
243a2e63 655#else
a37b85c9
VY
656static inline bool br_allowed_ingress(struct net_bridge *br,
657 struct net_port_vlans *v,
78851988
VY
658 struct sk_buff *skb,
659 u16 *vid)
a37b85c9
VY
660{
661 return true;
662}
663
85f46c6b
VY
664static inline bool br_allowed_egress(struct net_bridge *br,
665 const struct net_port_vlans *v,
666 const struct sk_buff *skb)
667{
668 return true;
669}
670
e0d7968a
TM
671static inline bool br_should_learn(struct net_bridge_port *p,
672 struct sk_buff *skb, u16 *vid)
673{
674 return true;
675}
676
78851988
VY
677static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
678 const struct net_port_vlans *v,
679 struct sk_buff *skb)
680{
681 return skb;
682}
683
552406c4 684static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63
VY
685{
686 return -EOPNOTSUPP;
687}
688
689static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
690{
691 return -EOPNOTSUPP;
692}
693
694static inline void br_vlan_flush(struct net_bridge *br)
695{
696}
697
2b292fb4
TM
698static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
699{
700 return false;
701}
702
204177f3
TM
703static inline void br_recalculate_fwd_mask(struct net_bridge *br)
704{
705}
706
8580e211
TM
707static inline void br_vlan_init(struct net_bridge *br)
708{
709}
710
552406c4 711static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63
VY
712{
713 return -EOPNOTSUPP;
714}
715
716static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
717{
718 return -EOPNOTSUPP;
719}
720
721static inline void nbp_vlan_flush(struct net_bridge_port *port)
722{
723}
724
a37b85c9
VY
725static inline struct net_port_vlans *br_get_vlan_info(
726 const struct net_bridge *br)
727{
728 return NULL;
729}
730static inline struct net_port_vlans *nbp_get_vlan_info(
731 const struct net_bridge_port *p)
732{
733 return NULL;
734}
735
bc9a25d2
VY
736static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
737{
738 return false;
739}
740
78851988 741static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
a37b85c9
VY
742{
743 return 0;
744}
78851988
VY
745static inline u16 br_get_pvid(const struct net_port_vlans *v)
746{
747 return VLAN_N_VID; /* Returns invalid vid */
748}
2796d0c6 749
d4f0e095 750static inline int br_vlan_enabled(struct net_bridge *br)
2796d0c6
VY
751{
752 return 0;
753}
243a2e63
VY
754#endif
755
1da177e4 756/* br_netfilter.c */
34666d46
PNA
757#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
758int br_nf_core_init(void);
759void br_nf_core_fini(void);
348662a1 760void br_netfilter_rtable_init(struct net_bridge *);
c0909713 761#else
34666d46
PNA
762static inline int br_nf_core_init(void) { return 0; }
763static inline void br_nf_core_fini(void) {}
4adf0af6 764#define br_netfilter_rtable_init(x)
c0909713 765#endif
1da177e4
LT
766
767/* br_stp.c */
348662a1
JP
768void br_log_state(const struct net_bridge_port *p);
769struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
770void br_init_port(struct net_bridge_port *p);
771void br_become_designated_port(struct net_bridge_port *p);
1da177e4 772
348662a1
JP
773void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
774int br_set_forward_delay(struct net_bridge *br, unsigned long x);
775int br_set_hello_time(struct net_bridge *br, unsigned long x);
776int br_set_max_age(struct net_bridge *br, unsigned long x);
14f98f25 777
778
1da177e4 779/* br_stp_if.c */
348662a1
JP
780void br_stp_enable_bridge(struct net_bridge *br);
781void br_stp_disable_bridge(struct net_bridge *br);
782void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
783void br_stp_enable_port(struct net_bridge_port *p);
784void br_stp_disable_port(struct net_bridge_port *p);
785bool br_stp_recalculate_bridge_id(struct net_bridge *br);
786void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
787void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
788int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
789int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
790ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1da177e4
LT
791
792/* br_stp_bpdu.c */
7c85fbf0 793struct stp_proto;
348662a1
JP
794void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
795 struct net_device *dev);
1da177e4
LT
796
797/* br_stp_timer.c */
348662a1
JP
798void br_stp_timer_init(struct net_bridge *br);
799void br_stp_port_timer_init(struct net_bridge_port *p);
800unsigned long br_timer_value(const struct timer_list *timer);
1da177e4
LT
801
802/* br.c */
e6373c4c 803#if IS_ENABLED(CONFIG_ATM_LANE)
da678292
MM
804extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
805#endif
1da177e4 806
11dc1f36 807/* br_netlink.c */
149ddd83 808extern struct rtnl_link_ops br_link_ops;
348662a1
JP
809int br_netlink_init(void);
810void br_netlink_fini(void);
811void br_ifinfo_notify(int event, struct net_bridge_port *port);
812int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
813int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
814int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
815 u32 filter_mask);
11dc1f36 816
1da177e4
LT
817#ifdef CONFIG_SYSFS
818/* br_sysfs_if.c */
52cf25d0 819extern const struct sysfs_ops brport_sysfs_ops;
348662a1
JP
820int br_sysfs_addif(struct net_bridge_port *p);
821int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4
LT
822
823/* br_sysfs_br.c */
348662a1
JP
824int br_sysfs_addbr(struct net_device *dev);
825void br_sysfs_delbr(struct net_device *dev);
1da177e4
LT
826
827#else
828
0cb2bbbe
LJ
829static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
830static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
831static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
832static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1da177e4
LT
833#endif /* CONFIG_SYSFS */
834
835#endif