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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>
2594e906 23#include <linux/rhashtable.h>
1da177e4
LT
24
25#define BR_HASH_BITS 8
26#define BR_HASH_SIZE (1 << BR_HASH_BITS)
27
28#define BR_HOLD_TIME (1*HZ)
29
30#define BR_PORT_BITS 10
31#define BR_MAX_PORTS (1<<BR_PORT_BITS)
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};
1080ab95
NA
78
79/* IGMP/MLD statistics */
80struct bridge_mcast_stats {
81 struct br_mcast_stats mstats;
82 struct u64_stats_sync syncp;
83};
cc0fdd80
LL
84#endif
85
6dada9b1
NA
86struct br_vlan_stats {
87 u64 rx_bytes;
88 u64 rx_packets;
89 u64 tx_bytes;
90 u64 tx_packets;
91 struct u64_stats_sync syncp;
92};
93
2594e906
NA
94/**
95 * struct net_bridge_vlan - per-vlan entry
96 *
97 * @vnode: rhashtable member
98 * @vid: VLAN id
99 * @flags: bridge vlan flags
6dada9b1 100 * @stats: per-cpu VLAN statistics
2594e906
NA
101 * @br: if MASTER flag set, this points to a bridge struct
102 * @port: if MASTER flag unset, this points to a port struct
103 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
104 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
105 * for this VLAN entry
106 * @vlist: sorted list of VLAN entries
107 * @rcu: used for entry destruction
108 *
109 * This structure is shared between the global per-VLAN entries contained in
110 * the bridge rhashtable and the local per-port per-VLAN entries contained in
111 * the port's rhashtable. The union entries should be interpreted depending on
112 * the entry flags that are set.
113 */
114struct net_bridge_vlan {
115 struct rhash_head vnode;
116 u16 vid;
117 u16 flags;
6dada9b1 118 struct br_vlan_stats __percpu *stats;
243a2e63 119 union {
2594e906
NA
120 struct net_bridge *br;
121 struct net_bridge_port *port;
122 };
123 union {
124 atomic_t refcnt;
125 struct net_bridge_vlan *brvlan;
126 };
127 struct list_head vlist;
128
243a2e63 129 struct rcu_head rcu;
2594e906
NA
130};
131
132/**
133 * struct net_bridge_vlan_group
134 *
135 * @vlan_hash: VLAN entry rhashtable
136 * @vlan_list: sorted VLAN entry list
137 * @num_vlans: number of total VLAN entries
77751ee8 138 * @pvid: PVID VLAN id
2594e906
NA
139 *
140 * IMPORTANT: Be careful when checking if there're VLAN entries using list
141 * primitives because the bridge can have entries in its list which
142 * are just for global context but not for filtering, i.e. they have
143 * the master flag set but not the brentry flag. If you have to check
144 * if there're "real" entries in the bridge please test @num_vlans
145 */
146struct net_bridge_vlan_group {
147 struct rhashtable vlan_hash;
148 struct list_head vlan_list;
6cbdceeb 149 u16 num_vlans;
77751ee8 150 u16 pvid;
243a2e63
VY
151};
152
1da177e4
LT
153struct net_bridge_fdb_entry
154{
155 struct hlist_node hlist;
156 struct net_bridge_port *dst;
157
7cd8861a 158 unsigned long updated;
159 unsigned long used;
1da177e4 160 mac_addr addr;
b22fbf22 161 __u16 vlan_id;
93859b13
JP
162 unsigned char is_local:1,
163 is_static:1,
cf6b8e1e
SF
164 added_by_user:1,
165 added_by_external_learn:1;
b22fbf22 166 struct rcu_head rcu;
1da177e4
LT
167};
168
9d06b6d8
ER
169#define MDB_PG_FLAGS_PERMANENT BIT(0)
170#define MDB_PG_FLAGS_OFFLOAD BIT(1)
171
eb1d1641
HX
172struct net_bridge_port_group {
173 struct net_bridge_port *port;
e8051688 174 struct net_bridge_port_group __rcu *next;
eb1d1641
HX
175 struct hlist_node mglist;
176 struct rcu_head rcu;
177 struct timer_list timer;
8ef2a9a5 178 struct br_ip addr;
9d06b6d8 179 unsigned char flags;
eb1d1641
HX
180};
181
182struct net_bridge_mdb_entry
183{
184 struct hlist_node hlist[2];
eb1d1641 185 struct net_bridge *br;
e8051688 186 struct net_bridge_port_group __rcu *ports;
eb1d1641
HX
187 struct rcu_head rcu;
188 struct timer_list timer;
8ef2a9a5 189 struct br_ip addr;
8a870178 190 bool mglist;
eb1d1641
HX
191};
192
193struct net_bridge_mdb_htable
194{
195 struct hlist_head *mhash;
196 struct rcu_head rcu;
197 struct net_bridge_mdb_htable *old;
198 u32 size;
199 u32 max;
200 u32 secret;
201 u32 ver;
202};
203
1da177e4
LT
204struct net_bridge_port
205{
206 struct net_bridge *br;
207 struct net_device *dev;
208 struct list_head list;
209
210 /* STP */
211 u8 priority;
212 u8 state;
213 u16 port_no;
214 unsigned char topology_change_ack;
215 unsigned char config_pending;
216 port_id port_id;
217 port_id designated_port;
218 bridge_id designated_root;
219 bridge_id designated_bridge;
220 u32 path_cost;
221 u32 designated_cost;
0c03150e 222 unsigned long designated_age;
1da177e4
LT
223
224 struct timer_list forward_delay_timer;
225 struct timer_list hold_timer;
226 struct timer_list message_age_timer;
227 struct kobject kobj;
228 struct rcu_head rcu;
3982d3d2
FA
229
230 unsigned long flags;
eb1d1641
HX
231
232#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
90010b36 233 struct bridge_mcast_own_query ip4_own_query;
cc0fdd80 234#if IS_ENABLED(CONFIG_IPV6)
90010b36 235 struct bridge_mcast_own_query ip6_own_query;
cc0fdd80 236#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641 237 unsigned char multicast_router;
1080ab95 238 struct bridge_mcast_stats __percpu *mcast_stats;
eb1d1641 239 struct timer_list multicast_router_timer;
eb1d1641
HX
240 struct hlist_head mglist;
241 struct hlist_node rlist;
242#endif
e0f43752
SA
243
244#ifdef CONFIG_SYSFS
245 char sysfs_name[IFNAMSIZ];
246#endif
91d2c34a
HX
247
248#ifdef CONFIG_NET_POLL_CONTROLLER
249 struct netpoll *np;
250#endif
243a2e63 251#ifdef CONFIG_BRIDGE_VLAN_FILTERING
907b1e6e 252 struct net_bridge_vlan_group __rcu *vlgrp;
243a2e63 253#endif
1da177e4
LT
254};
255
e028e4b8 256#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
f3a6ddf1 257#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
e028e4b8 258
f350a0a8
JP
259#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
260
b5ed54e9 261static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
262{
716ec052 263 return rcu_dereference(dev->rx_handler_data);
b5ed54e9 264}
265
1fb1754a 266static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
b5ed54e9 267{
ec1e5610
ED
268 return br_port_exists(dev) ?
269 rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9 270}
271
1da177e4
LT
272struct net_bridge
273{
274 spinlock_t lock;
275 struct list_head port_list;
276 struct net_device *dev;
14bb4789 277
8f84985f 278 struct pcpu_sw_netstats __percpu *stats;
1da177e4
LT
279 spinlock_t hash_lock;
280 struct hlist_head hash[BR_HASH_SIZE];
34666d46 281#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
efb6de9b
BT
282 union {
283 struct rtable fake_rtable;
284 struct rt6_info fake_rt6_info;
285 };
4df53d8b
PM
286 bool nf_call_iptables;
287 bool nf_call_ip6tables;
288 bool nf_call_arptables;
4adf0af6 289#endif
515853cc 290 u16 group_fwd_mask;
f2808d22 291 u16 group_fwd_mask_required;
515853cc 292
1da177e4
LT
293 /* STP */
294 bridge_id designated_root;
295 bridge_id bridge_id;
296 u32 root_path_cost;
297 unsigned long max_age;
298 unsigned long hello_time;
299 unsigned long forward_delay;
300 unsigned long bridge_max_age;
301 unsigned long ageing_time;
302 unsigned long bridge_hello_time;
303 unsigned long bridge_forward_delay;
304
fda93d92 305 u8 group_addr[ETH_ALEN];
204177f3 306 bool group_addr_set;
1da177e4 307 u16 root_port;
9cde0708
SH
308
309 enum {
310 BR_NO_STP, /* no spanning tree */
311 BR_KERNEL_STP, /* old STP in kernel */
312 BR_USER_STP, /* new RSTP in userspace */
313 } stp_enabled;
314
1da177e4
LT
315 unsigned char topology_change;
316 unsigned char topology_change_detected;
317
eb1d1641
HX
318#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
319 unsigned char multicast_router;
320
321 u8 multicast_disabled:1;
c5c23260 322 u8 multicast_querier:1;
1c8ad5bf 323 u8 multicast_query_use_ifaddr:1;
0888d5f3 324 u8 has_ipv6_addr:1;
1080ab95 325 u8 multicast_stats_enabled:1;
eb1d1641
HX
326
327 u32 hash_elasticity;
328 u32 hash_max;
329
330 u32 multicast_last_member_count;
eb1d1641
HX
331 u32 multicast_startup_query_count;
332
333 unsigned long multicast_last_member_interval;
334 unsigned long multicast_membership_interval;
335 unsigned long multicast_querier_interval;
336 unsigned long multicast_query_interval;
337 unsigned long multicast_query_response_interval;
338 unsigned long multicast_startup_query_interval;
339
340 spinlock_t multicast_lock;
e8051688 341 struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641 342 struct hlist_head router_list;
eb1d1641
HX
343
344 struct timer_list multicast_router_timer;
90010b36
LL
345 struct bridge_mcast_other_query ip4_other_query;
346 struct bridge_mcast_own_query ip4_own_query;
dc4eb53a 347 struct bridge_mcast_querier ip4_querier;
1080ab95 348 struct bridge_mcast_stats __percpu *mcast_stats;
cc0fdd80 349#if IS_ENABLED(CONFIG_IPV6)
90010b36
LL
350 struct bridge_mcast_other_query ip6_other_query;
351 struct bridge_mcast_own_query ip6_own_query;
dc4eb53a 352 struct bridge_mcast_querier ip6_querier;
cc0fdd80 353#endif /* IS_ENABLED(CONFIG_IPV6) */
eb1d1641
HX
354#endif
355
1da177e4
LT
356 struct timer_list hello_timer;
357 struct timer_list tcn_timer;
358 struct timer_list topology_change_timer;
359 struct timer_list gc_timer;
43b98c4a 360 struct kobject *ifobj;
e028e4b8 361 u32 auto_cnt;
243a2e63 362#ifdef CONFIG_BRIDGE_VLAN_FILTERING
907b1e6e 363 struct net_bridge_vlan_group __rcu *vlgrp;
243a2e63 364 u8 vlan_enabled;
6dada9b1 365 u8 vlan_stats_enabled;
8580e211 366 __be16 vlan_proto;
96a20d9d 367 u16 default_pvid;
243a2e63 368#endif
1da177e4
LT
369};
370
68b7c895
HX
371struct br_input_skb_cb {
372 struct net_device *brdev;
93fdd47e 373
32dec5dd 374#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641
HX
375 int igmp;
376 int mrouters_only;
32dec5dd 377#endif
93fdd47e 378
842a9ae0 379 bool proxyarp_replied;
93fdd47e 380
20adfa1a
VY
381#ifdef CONFIG_BRIDGE_VLAN_FILTERING
382 bool vlan_filtered;
383#endif
68b7c895
HX
384};
385
386#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
387
32dec5dd
YH
388#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
389# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
390#else
391# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
392#endif
393
28a16c97 394#define br_printk(level, br, format, args...) \
395 printk(level "%s: " format, (br)->dev->name, ##args)
396
397#define br_err(__br, format, args...) \
398 br_printk(KERN_ERR, __br, format, ##args)
399#define br_warn(__br, format, args...) \
400 br_printk(KERN_WARNING, __br, format, ##args)
401#define br_notice(__br, format, args...) \
402 br_printk(KERN_NOTICE, __br, format, ##args)
403#define br_info(__br, format, args...) \
404 br_printk(KERN_INFO, __br, format, ##args)
405
406#define br_debug(br, format, args...) \
407 pr_debug("%s: " format, (br)->dev->name, ##args)
408
1da177e4
LT
409/* called under bridge lock */
410static inline int br_is_root_bridge(const struct net_bridge *br)
411{
412 return !memcmp(&br->bridge_id, &br->designated_root, 8);
413}
414
2594e906
NA
415/* check if a VLAN entry is global */
416static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
417{
418 return v->flags & BRIDGE_VLAN_INFO_MASTER;
419}
420
421/* check if a VLAN entry is used by the bridge */
422static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
423{
424 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
425}
426
6be144f6 427/* check if we should use the vlan entry, returns false if it's only context */
2594e906
NA
428static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
429{
430 if (br_vlan_is_master(v)) {
431 if (br_vlan_is_brentry(v))
432 return true;
433 else
434 return false;
435 }
436
437 return true;
438}
439
1da177e4 440/* br_device.c */
348662a1
JP
441void br_dev_setup(struct net_device *dev);
442void br_dev_delete(struct net_device *dev, struct list_head *list);
443netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
cfb478da 444#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a
HX
445static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
446 struct sk_buff *skb)
447{
448 struct netpoll *np = p->np;
449
450 if (np)
451 netpoll_send_skb(np, skb);
452}
453
a8779ec1 454int br_netpoll_enable(struct net_bridge_port *p);
348662a1 455void br_netpoll_disable(struct net_bridge_port *p);
cfb478da 456#else
9f70b0fc 457static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a
HX
458 struct sk_buff *skb)
459{
460}
cfb478da 461
a8779ec1 462static inline int br_netpoll_enable(struct net_bridge_port *p)
91d2c34a
HX
463{
464 return 0;
465}
466
467static inline void br_netpoll_disable(struct net_bridge_port *p)
468{
469}
cfb478da 470#endif
1da177e4
LT
471
472/* br_fdb.c */
348662a1
JP
473int br_fdb_init(void);
474void br_fdb_fini(void);
475void br_fdb_flush(struct net_bridge *br);
424bb9c9
TM
476void br_fdb_find_delete_local(struct net_bridge *br,
477 const struct net_bridge_port *p,
478 const unsigned char *addr, u16 vid);
348662a1
JP
479void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
480void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
481void br_fdb_cleanup(unsigned long arg);
482void br_fdb_delete_by_port(struct net_bridge *br,
1ea2d020 483 const struct net_bridge_port *p, u16 vid, int do_all);
348662a1
JP
484struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
485 const unsigned char *addr, __u16 vid);
486int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
487int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
488 unsigned long off);
489int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
490 const unsigned char *addr, u16 vid);
491void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
a5642ab4 492 const unsigned char *addr, u16 vid, bool added_by_user);
348662a1
JP
493
494int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
f6f6424b 495 struct net_device *dev, const unsigned char *addr, u16 vid);
348662a1 496int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
f6f6424b 497 const unsigned char *addr, u16 vid, u16 nlh_flags);
348662a1 498int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
5d5eacb3 499 struct net_device *dev, struct net_device *fdev, int idx);
8db24af7
VY
500int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
501void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
3aeb6617
JP
502int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
503 const unsigned char *addr, u16 vid);
504int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
505 const unsigned char *addr, u16 vid);
1da177e4
LT
506
507/* br_forward.c */
0c4b51f0 508int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
b35c5f63 509void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
37b090e6 510 bool local_rcv, bool local_orig);
0c4b51f0 511int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
37b090e6
NA
512void br_flood(struct net_bridge *br, struct sk_buff *skb,
513 bool unicast, bool local_rcv, bool local_orig);
1da177e4
LT
514
515/* br_if.c */
348662a1
JP
516void br_port_carrier_check(struct net_bridge_port *p);
517int br_add_bridge(struct net *net, const char *name);
518int br_del_bridge(struct net *net, const char *name);
348662a1
JP
519int br_add_if(struct net_bridge *br, struct net_device *dev);
520int br_del_if(struct net_bridge *br, struct net_device *dev);
521int br_min_mtu(const struct net_bridge *br);
522netdev_features_t br_features_recompute(struct net_bridge *br,
523 netdev_features_t features);
e028e4b8 524void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
2796d0c6 525void br_manage_promisc(struct net_bridge *br);
1da177e4
LT
526
527/* br_input.c */
0c4b51f0 528int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
348662a1 529rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4 530
859828c0
JP
531static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
532{
533 return rcu_dereference(dev->rx_handler) == br_handle_frame;
534}
535
536static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
537{
538 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
539}
540
1da177e4 541/* br_ioctl.c */
348662a1
JP
542int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
543int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
544 void __user *arg);
1da177e4 545
eb1d1641
HX
546/* br_multicast.c */
547#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
2ce297fc 548extern unsigned int br_mdb_rehash_seq;
348662a1 549int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
394efd19 550 struct sk_buff *skb, u16 vid);
348662a1
JP
551struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
552 struct sk_buff *skb, u16 vid);
1080ab95 553int br_multicast_add_port(struct net_bridge_port *port);
348662a1
JP
554void br_multicast_del_port(struct net_bridge_port *port);
555void br_multicast_enable_port(struct net_bridge_port *port);
556void br_multicast_disable_port(struct net_bridge_port *port);
557void br_multicast_init(struct net_bridge *br);
558void br_multicast_open(struct net_bridge *br);
559void br_multicast_stop(struct net_bridge *br);
e10177ab 560void br_multicast_dev_del(struct net_bridge *br);
37b090e6
NA
561void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
562 struct sk_buff *skb, bool local_rcv, bool local_orig);
348662a1
JP
563int br_multicast_set_router(struct net_bridge *br, unsigned long val);
564int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
565int br_multicast_toggle(struct net_bridge *br, unsigned long val);
566int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
567int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
568struct net_bridge_mdb_entry *
569br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
570struct net_bridge_mdb_entry *
571br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
572 struct br_ip *group);
573void br_multicast_free_pg(struct rcu_head *head);
574struct net_bridge_port_group *
575br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
576 struct net_bridge_port_group __rcu *next,
9d06b6d8 577 unsigned char flags);
348662a1
JP
578void br_mdb_init(void);
579void br_mdb_uninit(void);
45ebcce5
ER
580void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
581 struct br_ip *group, int type, u8 flags);
949f1e39
SA
582void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
583 int type);
1080ab95 584void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
a65056ec 585 const struct sk_buff *skb, u8 type, u8 dir);
1080ab95
NA
586int br_multicast_init_stats(struct net_bridge *br);
587void br_multicast_get_stats(const struct net_bridge *br,
588 const struct net_bridge_port *p,
589 struct br_mcast_stats *dest);
85b35269 590
cfd56754
CW
591#define mlock_dereference(X, br) \
592 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
593
85b35269
SS
594static inline bool br_multicast_is_router(struct net_bridge *br)
595{
596 return br->multicast_router == 2 ||
597 (br->multicast_router == 1 &&
598 timer_pending(&br->multicast_router_timer));
599}
b00589af 600
cc0fdd80
LL
601static inline bool
602__br_multicast_querier_exists(struct net_bridge *br,
0888d5f3 603 struct bridge_mcast_other_query *querier,
604 const bool is_ipv6)
b00589af 605{
0888d5f3 606 bool own_querier_enabled;
607
608 if (br->multicast_querier) {
609 if (is_ipv6 && !br->has_ipv6_addr)
610 own_querier_enabled = false;
611 else
612 own_querier_enabled = true;
613 } else {
614 own_querier_enabled = false;
615 }
616
cc0fdd80 617 return time_is_before_jiffies(querier->delay_time) &&
0888d5f3 618 (own_querier_enabled || timer_pending(&querier->timer));
cc0fdd80
LL
619}
620
621static inline bool br_multicast_querier_exists(struct net_bridge *br,
622 struct ethhdr *eth)
623{
624 switch (eth->h_proto) {
625 case (htons(ETH_P_IP)):
0888d5f3 626 return __br_multicast_querier_exists(br,
627 &br->ip4_other_query, false);
cc0fdd80
LL
628#if IS_ENABLED(CONFIG_IPV6)
629 case (htons(ETH_P_IPV6)):
0888d5f3 630 return __br_multicast_querier_exists(br,
631 &br->ip6_other_query, true);
cc0fdd80
LL
632#endif
633 default:
634 return false;
635 }
b00589af 636}
1080ab95
NA
637
638static inline int br_multicast_igmp_type(const struct sk_buff *skb)
639{
640 return BR_INPUT_SKB_CB(skb)->igmp;
641}
eb1d1641
HX
642#else
643static inline int br_multicast_rcv(struct net_bridge *br,
644 struct net_bridge_port *port,
06499098
VY
645 struct sk_buff *skb,
646 u16 vid)
eb1d1641
HX
647{
648 return 0;
649}
650
651static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
fbca58a2 652 struct sk_buff *skb, u16 vid)
eb1d1641
HX
653{
654 return NULL;
655}
656
1080ab95 657static inline int br_multicast_add_port(struct net_bridge_port *port)
eb1d1641 658{
1080ab95 659 return 0;
eb1d1641
HX
660}
661
662static inline void br_multicast_del_port(struct net_bridge_port *port)
663{
664}
665
666static inline void br_multicast_enable_port(struct net_bridge_port *port)
667{
668}
669
670static inline void br_multicast_disable_port(struct net_bridge_port *port)
671{
672}
673
674static inline void br_multicast_init(struct net_bridge *br)
675{
676}
677
678static inline void br_multicast_open(struct net_bridge *br)
679{
680}
681
682static inline void br_multicast_stop(struct net_bridge *br)
683{
684}
5cb5e947 685
a7ce45a7
NA
686static inline void br_multicast_dev_del(struct net_bridge *br)
687{
688}
689
37b090e6
NA
690static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
691 struct sk_buff *skb,
692 bool local_rcv, bool local_orig)
5cb5e947
HX
693{
694}
695
eb1d1641
HX
696static inline bool br_multicast_is_router(struct net_bridge *br)
697{
85b35269 698 return 0;
eb1d1641 699}
37b090e6 700
cc0fdd80
LL
701static inline bool br_multicast_querier_exists(struct net_bridge *br,
702 struct ethhdr *eth)
b00589af
LL
703{
704 return false;
705}
37b090e6 706
fdb184d1
RR
707static inline void br_mdb_init(void)
708{
709}
37b090e6 710
fdb184d1
RR
711static inline void br_mdb_uninit(void)
712{
713}
1080ab95
NA
714
715static inline void br_multicast_count(struct net_bridge *br,
716 const struct net_bridge_port *p,
a65056ec
NA
717 const struct sk_buff *skb,
718 u8 type, u8 dir)
1080ab95
NA
719{
720}
721
722static inline int br_multicast_init_stats(struct net_bridge *br)
723{
724 return 0;
725}
726
727static inline int br_multicast_igmp_type(const struct sk_buff *skb)
728{
729 return 0;
730}
85b35269 731#endif
eb1d1641 732
243a2e63
VY
733/* br_vlan.c */
734#ifdef CONFIG_BRIDGE_VLAN_FILTERING
77751ee8
NA
735bool br_allowed_ingress(const struct net_bridge *br,
736 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
737 u16 *vid);
738bool br_allowed_egress(struct net_bridge_vlan_group *vg,
348662a1 739 const struct sk_buff *skb);
e0d7968a 740bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
348662a1 741struct sk_buff *br_handle_vlan(struct net_bridge *br,
2594e906 742 struct net_bridge_vlan_group *vg,
348662a1
JP
743 struct sk_buff *skb);
744int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
745int br_vlan_delete(struct net_bridge *br, u16 vid);
746void br_vlan_flush(struct net_bridge *br);
2594e906 747struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
204177f3 748void br_recalculate_fwd_mask(struct net_bridge *br);
a7854037 749int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
348662a1 750int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
d2d427b3 751int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
204177f3 752int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
6dada9b1 753int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
5be5a2df 754int br_vlan_init(struct net_bridge *br);
96a20d9d 755int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
0f963b75 756int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
348662a1
JP
757int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
758int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
759void nbp_vlan_flush(struct net_bridge_port *port);
5be5a2df 760int nbp_vlan_init(struct net_bridge_port *port);
2594e906 761int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
a60c0903
NA
762void br_vlan_get_stats(const struct net_bridge_vlan *v,
763 struct br_vlan_stats *stats);
a37b85c9 764
2594e906
NA
765static inline struct net_bridge_vlan_group *br_vlan_group(
766 const struct net_bridge *br)
a37b85c9 767{
907b1e6e 768 return rtnl_dereference(br->vlgrp);
a37b85c9
VY
769}
770
2594e906
NA
771static inline struct net_bridge_vlan_group *nbp_vlan_group(
772 const struct net_bridge_port *p)
a37b85c9 773{
907b1e6e
NA
774 return rtnl_dereference(p->vlgrp);
775}
776
777static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
778 const struct net_bridge *br)
779{
780 return rcu_dereference(br->vlgrp);
781}
782
783static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
784 const struct net_bridge_port *p)
785{
786 return rcu_dereference(p->vlgrp);
a37b85c9
VY
787}
788
789/* Since bridge now depends on 8021Q module, but the time bridge sees the
790 * skb, the vlan tag will always be present if the frame was tagged.
791 */
792static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
793{
794 int err = 0;
795
2594e906 796 if (skb_vlan_tag_present(skb)) {
df8a39de 797 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
2594e906 798 } else {
a37b85c9
VY
799 *vid = 0;
800 err = -EINVAL;
801 }
802
803 return err;
804}
78851988 805
77751ee8 806static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
2594e906 807{
77751ee8 808 if (!vg)
2594e906
NA
809 return 0;
810
811 smp_rmb();
77751ee8 812 return vg->pvid;
78851988
VY
813}
814
2796d0c6
VY
815static inline int br_vlan_enabled(struct net_bridge *br)
816{
817 return br->vlan_enabled;
818}
243a2e63 819#else
77751ee8
NA
820static inline bool br_allowed_ingress(const struct net_bridge *br,
821 struct net_bridge_vlan_group *vg,
78851988
VY
822 struct sk_buff *skb,
823 u16 *vid)
a37b85c9
VY
824{
825 return true;
826}
827
2594e906 828static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
85f46c6b
VY
829 const struct sk_buff *skb)
830{
831 return true;
832}
833
e0d7968a
TM
834static inline bool br_should_learn(struct net_bridge_port *p,
835 struct sk_buff *skb, u16 *vid)
836{
837 return true;
838}
839
78851988 840static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
2594e906 841 struct net_bridge_vlan_group *vg,
78851988
VY
842 struct sk_buff *skb)
843{
844 return skb;
845}
846
552406c4 847static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
243a2e63
VY
848{
849 return -EOPNOTSUPP;
850}
851
852static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
853{
854 return -EOPNOTSUPP;
855}
856
857static inline void br_vlan_flush(struct net_bridge *br)
858{
859}
860
204177f3
TM
861static inline void br_recalculate_fwd_mask(struct net_bridge *br)
862{
863}
864
5be5a2df 865static inline int br_vlan_init(struct net_bridge *br)
8580e211 866{
5be5a2df 867 return 0;
8580e211
TM
868}
869
552406c4 870static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
243a2e63
VY
871{
872 return -EOPNOTSUPP;
873}
874
875static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
876{
877 return -EOPNOTSUPP;
878}
879
880static inline void nbp_vlan_flush(struct net_bridge_port *port)
881{
882}
883
2594e906
NA
884static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
885 u16 vid)
a37b85c9
VY
886{
887 return NULL;
888}
889
2594e906 890static inline int nbp_vlan_init(struct net_bridge_port *port)
bc9a25d2 891{
2594e906 892 return 0;
bc9a25d2
VY
893}
894
2594e906 895static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
5be5a2df
VY
896{
897 return 0;
898}
899
77751ee8 900static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
78851988 901{
3df6bf45 902 return 0;
78851988 903}
2796d0c6 904
d4f0e095 905static inline int br_vlan_enabled(struct net_bridge *br)
2796d0c6
VY
906{
907 return 0;
908}
a7854037
NA
909
910static inline int __br_vlan_filter_toggle(struct net_bridge *br,
911 unsigned long val)
912{
913 return -EOPNOTSUPP;
914}
2594e906
NA
915
916static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
917 u32 filter_mask)
918{
919 return 0;
920}
921
922static inline struct net_bridge_vlan_group *br_vlan_group(
923 const struct net_bridge *br)
924{
925 return NULL;
926}
927
928static inline struct net_bridge_vlan_group *nbp_vlan_group(
929 const struct net_bridge_port *p)
930{
931 return NULL;
932}
907b1e6e
NA
933
934static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
935 const struct net_bridge *br)
936{
937 return NULL;
938}
939
940static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
941 const struct net_bridge_port *p)
942{
943 return NULL;
944}
a60c0903
NA
945
946static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
947 struct br_vlan_stats *stats)
948{
949}
243a2e63
VY
950#endif
951
1a4ba64d
PNA
952struct nf_br_ops {
953 int (*br_dev_xmit_hook)(struct sk_buff *skb);
954};
955extern const struct nf_br_ops __rcu *nf_br_ops;
956
1da177e4 957/* br_netfilter.c */
34666d46
PNA
958#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
959int br_nf_core_init(void);
960void br_nf_core_fini(void);
348662a1 961void br_netfilter_rtable_init(struct net_bridge *);
c0909713 962#else
34666d46
PNA
963static inline int br_nf_core_init(void) { return 0; }
964static inline void br_nf_core_fini(void) {}
4adf0af6 965#define br_netfilter_rtable_init(x)
c0909713 966#endif
1da177e4
LT
967
968/* br_stp.c */
775dd692 969void br_set_state(struct net_bridge_port *p, unsigned int state);
348662a1
JP
970struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
971void br_init_port(struct net_bridge_port *p);
972void br_become_designated_port(struct net_bridge_port *p);
1da177e4 973
348662a1
JP
974void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
975int br_set_forward_delay(struct net_bridge *br, unsigned long x);
976int br_set_hello_time(struct net_bridge *br, unsigned long x);
977int br_set_max_age(struct net_bridge *br, unsigned long x);
c62987bb 978int br_set_ageing_time(struct net_bridge *br, u32 ageing_time);
14f98f25 979
980
1da177e4 981/* br_stp_if.c */
348662a1
JP
982void br_stp_enable_bridge(struct net_bridge *br);
983void br_stp_disable_bridge(struct net_bridge *br);
984void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
985void br_stp_enable_port(struct net_bridge_port *p);
986void br_stp_disable_port(struct net_bridge_port *p);
987bool br_stp_recalculate_bridge_id(struct net_bridge *br);
988void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
989void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
990int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
991int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
992ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1da177e4
LT
993
994/* br_stp_bpdu.c */
7c85fbf0 995struct stp_proto;
348662a1
JP
996void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
997 struct net_device *dev);
1da177e4
LT
998
999/* br_stp_timer.c */
348662a1
JP
1000void br_stp_timer_init(struct net_bridge *br);
1001void br_stp_port_timer_init(struct net_bridge_port *p);
1002unsigned long br_timer_value(const struct timer_list *timer);
1da177e4
LT
1003
1004/* br.c */
e6373c4c 1005#if IS_ENABLED(CONFIG_ATM_LANE)
da678292
MM
1006extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1007#endif
1da177e4 1008
11dc1f36 1009/* br_netlink.c */
149ddd83 1010extern struct rtnl_link_ops br_link_ops;
348662a1
JP
1011int br_netlink_init(void);
1012void br_netlink_fini(void);
1013void br_ifinfo_notify(int event, struct net_bridge_port *port);
add511b3
RP
1014int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1015int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
348662a1 1016int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
46c264da 1017 u32 filter_mask, int nlflags);
11dc1f36 1018
1da177e4
LT
1019#ifdef CONFIG_SYSFS
1020/* br_sysfs_if.c */
52cf25d0 1021extern const struct sysfs_ops brport_sysfs_ops;
348662a1
JP
1022int br_sysfs_addif(struct net_bridge_port *p);
1023int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4
LT
1024
1025/* br_sysfs_br.c */
348662a1
JP
1026int br_sysfs_addbr(struct net_device *dev);
1027void br_sysfs_delbr(struct net_device *dev);
1da177e4
LT
1028
1029#else
1030
0cb2bbbe
LJ
1031static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1032static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1033static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1034static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1da177e4
LT
1035#endif /* CONFIG_SYSFS */
1036
1037#endif