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9#ifndef _BR_PRIVATE_H
10#define _BR_PRIVATE_H
11
12#include <linux/netdevice.h>
13#include <linux/if_bridge.h>
14#include <linux/netpoll.h>
15#include <linux/u64_stats_sync.h>
16#include <net/route.h>
17#include <net/ip6_fib.h>
18#include <linux/if_vlan.h>
19#include <linux/rhashtable.h>
20#include <linux/refcount.h>
21
22#define BR_HASH_BITS 8
23#define BR_HASH_SIZE (1 << BR_HASH_BITS)
24
25#define BR_HOLD_TIME (1*HZ)
26
27#define BR_PORT_BITS 10
28#define BR_MAX_PORTS (1<<BR_PORT_BITS)
29
30#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
31
32#define BR_VERSION "2.3"
33
34
35#define BR_GROUPFWD_DEFAULT 0
36
37enum {
38 BR_GROUPFWD_STP = BIT(0),
39 BR_GROUPFWD_MACPAUSE = BIT(1),
40 BR_GROUPFWD_LACP = BIT(2),
41};
42
43#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
44 BR_GROUPFWD_LACP)
45
46#define BR_GROUPFWD_8021AD 0xB801u
47
48
49#define BR_STP_PROG "/sbin/bridge-stp"
50
51typedef struct bridge_id bridge_id;
52typedef struct mac_addr mac_addr;
53typedef __u16 port_id;
54
55struct bridge_id {
56 unsigned char prio[2];
57 unsigned char addr[ETH_ALEN];
58};
59
60struct mac_addr {
61 unsigned char addr[ETH_ALEN];
62};
63
64#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
65
66struct bridge_mcast_own_query {
67 struct timer_list timer;
68 u32 startup_sent;
69};
70
71
72struct bridge_mcast_other_query {
73 struct timer_list timer;
74 unsigned long delay_time;
75};
76
77
78struct bridge_mcast_querier {
79 struct br_ip addr;
80 struct net_bridge_port __rcu *port;
81};
82
83
84struct bridge_mcast_stats {
85 struct br_mcast_stats mstats;
86 struct u64_stats_sync syncp;
87};
88#endif
89
90struct br_vlan_stats {
91 u64 rx_bytes;
92 u64 rx_packets;
93 u64 tx_bytes;
94 u64 tx_packets;
95 struct u64_stats_sync syncp;
96};
97
98struct br_tunnel_info {
99 __be64 tunnel_id;
100 struct metadata_dst *tunnel_dst;
101};
102
103
104enum {
105 BR_VLFLAG_PER_PORT_STATS = BIT(0),
106 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
107};
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129
130struct net_bridge_vlan {
131 struct rhash_head vnode;
132 struct rhash_head tnode;
133 u16 vid;
134 u16 flags;
135 u16 priv_flags;
136 struct br_vlan_stats __percpu *stats;
137 union {
138 struct net_bridge *br;
139 struct net_bridge_port *port;
140 };
141 union {
142 refcount_t refcnt;
143 struct net_bridge_vlan *brvlan;
144 };
145
146 struct br_tunnel_info tinfo;
147
148 struct list_head vlist;
149
150 struct rcu_head rcu;
151};
152
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166
167struct net_bridge_vlan_group {
168 struct rhashtable vlan_hash;
169 struct rhashtable tunnel_hash;
170 struct list_head vlan_list;
171 u16 num_vlans;
172 u16 pvid;
173};
174
175struct net_bridge_fdb_key {
176 mac_addr addr;
177 u16 vlan_id;
178};
179
180struct net_bridge_fdb_entry {
181 struct rhash_head rhnode;
182 struct net_bridge_port *dst;
183
184 struct net_bridge_fdb_key key;
185 struct hlist_node fdb_node;
186 unsigned char is_local:1,
187 is_static:1,
188 is_sticky:1,
189 added_by_user:1,
190 added_by_external_learn:1,
191 offloaded:1;
192
193
194 unsigned long updated ____cacheline_aligned_in_smp;
195 unsigned long used;
196
197 struct rcu_head rcu;
198};
199
200#define MDB_PG_FLAGS_PERMANENT BIT(0)
201#define MDB_PG_FLAGS_OFFLOAD BIT(1)
202
203struct net_bridge_port_group {
204 struct net_bridge_port *port;
205 struct net_bridge_port_group __rcu *next;
206 struct hlist_node mglist;
207 struct rcu_head rcu;
208 struct timer_list timer;
209 struct br_ip addr;
210 unsigned char flags;
211 unsigned char eth_addr[ETH_ALEN];
212};
213
214struct net_bridge_mdb_entry {
215 struct rhash_head rhnode;
216 struct net_bridge *br;
217 struct net_bridge_port_group __rcu *ports;
218 struct rcu_head rcu;
219 struct timer_list timer;
220 struct br_ip addr;
221 bool host_joined;
222 struct hlist_node mdb_node;
223};
224
225struct net_bridge_port {
226 struct net_bridge *br;
227 struct net_device *dev;
228 struct list_head list;
229
230 unsigned long flags;
231#ifdef CONFIG_BRIDGE_VLAN_FILTERING
232 struct net_bridge_vlan_group __rcu *vlgrp;
233#endif
234 struct net_bridge_port __rcu *backup_port;
235
236
237 u8 priority;
238 u8 state;
239 u16 port_no;
240 unsigned char topology_change_ack;
241 unsigned char config_pending;
242 port_id port_id;
243 port_id designated_port;
244 bridge_id designated_root;
245 bridge_id designated_bridge;
246 u32 path_cost;
247 u32 designated_cost;
248 unsigned long designated_age;
249
250 struct timer_list forward_delay_timer;
251 struct timer_list hold_timer;
252 struct timer_list message_age_timer;
253 struct kobject kobj;
254 struct rcu_head rcu;
255
256#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
257 struct bridge_mcast_own_query ip4_own_query;
258#if IS_ENABLED(CONFIG_IPV6)
259 struct bridge_mcast_own_query ip6_own_query;
260#endif
261 unsigned char multicast_router;
262 struct bridge_mcast_stats __percpu *mcast_stats;
263 struct timer_list multicast_router_timer;
264 struct hlist_head mglist;
265 struct hlist_node rlist;
266#endif
267
268#ifdef CONFIG_SYSFS
269 char sysfs_name[IFNAMSIZ];
270#endif
271
272#ifdef CONFIG_NET_POLL_CONTROLLER
273 struct netpoll *np;
274#endif
275#ifdef CONFIG_NET_SWITCHDEV
276 int offload_fwd_mark;
277#endif
278 u16 group_fwd_mask;
279 u16 backup_redirected_cnt;
280};
281
282#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
283
284#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
285#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
286
287static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
288{
289 return rcu_dereference(dev->rx_handler_data);
290}
291
292static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
293{
294 return netif_is_bridge_port(dev) ?
295 rtnl_dereference(dev->rx_handler_data) : NULL;
296}
297
298static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
299{
300 return netif_is_bridge_port(dev) ?
301 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
302}
303
304enum net_bridge_opts {
305 BROPT_VLAN_ENABLED,
306 BROPT_VLAN_STATS_ENABLED,
307 BROPT_NF_CALL_IPTABLES,
308 BROPT_NF_CALL_IP6TABLES,
309 BROPT_NF_CALL_ARPTABLES,
310 BROPT_GROUP_ADDR_SET,
311 BROPT_MULTICAST_ENABLED,
312 BROPT_MULTICAST_QUERIER,
313 BROPT_MULTICAST_QUERY_USE_IFADDR,
314 BROPT_MULTICAST_STATS_ENABLED,
315 BROPT_HAS_IPV6_ADDR,
316 BROPT_NEIGH_SUPPRESS_ENABLED,
317 BROPT_MTU_SET_BY_USER,
318 BROPT_VLAN_STATS_PER_PORT,
319 BROPT_NO_LL_LEARN,
320 BROPT_VLAN_BRIDGE_BINDING,
321};
322
323struct net_bridge {
324 spinlock_t lock;
325 spinlock_t hash_lock;
326 struct list_head port_list;
327 struct net_device *dev;
328 struct pcpu_sw_netstats __percpu *stats;
329 unsigned long options;
330
331#ifdef CONFIG_BRIDGE_VLAN_FILTERING
332 __be16 vlan_proto;
333 u16 default_pvid;
334 struct net_bridge_vlan_group __rcu *vlgrp;
335#endif
336
337 struct rhashtable fdb_hash_tbl;
338#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
339 union {
340 struct rtable fake_rtable;
341 struct rt6_info fake_rt6_info;
342 };
343#endif
344 u16 group_fwd_mask;
345 u16 group_fwd_mask_required;
346
347
348 bridge_id designated_root;
349 bridge_id bridge_id;
350 unsigned char topology_change;
351 unsigned char topology_change_detected;
352 u16 root_port;
353 unsigned long max_age;
354 unsigned long hello_time;
355 unsigned long forward_delay;
356 unsigned long ageing_time;
357 unsigned long bridge_max_age;
358 unsigned long bridge_hello_time;
359 unsigned long bridge_forward_delay;
360 unsigned long bridge_ageing_time;
361 u32 root_path_cost;
362
363 u8 group_addr[ETH_ALEN];
364
365 enum {
366 BR_NO_STP,
367 BR_KERNEL_STP,
368 BR_USER_STP,
369 } stp_enabled;
370
371#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
372
373 u32 hash_max;
374
375 u32 multicast_last_member_count;
376 u32 multicast_startup_query_count;
377
378 u8 multicast_igmp_version;
379 u8 multicast_router;
380#if IS_ENABLED(CONFIG_IPV6)
381 u8 multicast_mld_version;
382#endif
383 spinlock_t multicast_lock;
384 unsigned long multicast_last_member_interval;
385 unsigned long multicast_membership_interval;
386 unsigned long multicast_querier_interval;
387 unsigned long multicast_query_interval;
388 unsigned long multicast_query_response_interval;
389 unsigned long multicast_startup_query_interval;
390
391 struct rhashtable mdb_hash_tbl;
392
393 struct hlist_head mdb_list;
394 struct hlist_head router_list;
395
396 struct timer_list multicast_router_timer;
397 struct bridge_mcast_other_query ip4_other_query;
398 struct bridge_mcast_own_query ip4_own_query;
399 struct bridge_mcast_querier ip4_querier;
400 struct bridge_mcast_stats __percpu *mcast_stats;
401#if IS_ENABLED(CONFIG_IPV6)
402 struct bridge_mcast_other_query ip6_other_query;
403 struct bridge_mcast_own_query ip6_own_query;
404 struct bridge_mcast_querier ip6_querier;
405#endif
406#endif
407
408 struct timer_list hello_timer;
409 struct timer_list tcn_timer;
410 struct timer_list topology_change_timer;
411 struct delayed_work gc_work;
412 struct kobject *ifobj;
413 u32 auto_cnt;
414
415#ifdef CONFIG_NET_SWITCHDEV
416 int offload_fwd_mark;
417#endif
418 struct hlist_head fdb_list;
419};
420
421struct br_input_skb_cb {
422 struct net_device *brdev;
423
424 u16 frag_max_size;
425#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
426 u8 igmp;
427 u8 mrouters_only:1;
428#endif
429 u8 proxyarp_replied:1;
430 u8 src_port_isolated:1;
431#ifdef CONFIG_BRIDGE_VLAN_FILTERING
432 u8 vlan_filtered:1;
433#endif
434#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
435 u8 br_netfilter_broute:1;
436#endif
437
438#ifdef CONFIG_NET_SWITCHDEV
439 int offload_fwd_mark;
440#endif
441};
442
443#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
444
445#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
446# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
447#else
448# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
449#endif
450
451#define br_printk(level, br, format, args...) \
452 printk(level "%s: " format, (br)->dev->name, ##args)
453
454#define br_err(__br, format, args...) \
455 br_printk(KERN_ERR, __br, format, ##args)
456#define br_warn(__br, format, args...) \
457 br_printk(KERN_WARNING, __br, format, ##args)
458#define br_notice(__br, format, args...) \
459 br_printk(KERN_NOTICE, __br, format, ##args)
460#define br_info(__br, format, args...) \
461 br_printk(KERN_INFO, __br, format, ##args)
462
463#define br_debug(br, format, args...) \
464 pr_debug("%s: " format, (br)->dev->name, ##args)
465
466
467static inline int br_is_root_bridge(const struct net_bridge *br)
468{
469 return !memcmp(&br->bridge_id, &br->designated_root, 8);
470}
471
472
473static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
474{
475 return v->flags & BRIDGE_VLAN_INFO_MASTER;
476}
477
478
479static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
480{
481 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
482}
483
484
485static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
486{
487 if (br_vlan_is_master(v)) {
488 if (br_vlan_is_brentry(v))
489 return true;
490 else
491 return false;
492 }
493
494 return true;
495}
496
497static inline int br_opt_get(const struct net_bridge *br,
498 enum net_bridge_opts opt)
499{
500 return test_bit(opt, &br->options);
501}
502
503int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
504 struct netlink_ext_ack *extack);
505int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
506int br_boolopt_multi_toggle(struct net_bridge *br,
507 struct br_boolopt_multi *bm,
508 struct netlink_ext_ack *extack);
509void br_boolopt_multi_get(const struct net_bridge *br,
510 struct br_boolopt_multi *bm);
511void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
512
513
514void br_dev_setup(struct net_device *dev);
515void br_dev_delete(struct net_device *dev, struct list_head *list);
516netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
517#ifdef CONFIG_NET_POLL_CONTROLLER
518static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
519 struct sk_buff *skb)
520{
521 struct netpoll *np = p->np;
522
523 if (np)
524 netpoll_send_skb(np, skb);
525}
526
527int br_netpoll_enable(struct net_bridge_port *p);
528void br_netpoll_disable(struct net_bridge_port *p);
529#else
530static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
531 struct sk_buff *skb)
532{
533}
534
535static inline int br_netpoll_enable(struct net_bridge_port *p)
536{
537 return 0;
538}
539
540static inline void br_netpoll_disable(struct net_bridge_port *p)
541{
542}
543#endif
544
545
546int br_fdb_init(void);
547void br_fdb_fini(void);
548int br_fdb_hash_init(struct net_bridge *br);
549void br_fdb_hash_fini(struct net_bridge *br);
550void br_fdb_flush(struct net_bridge *br);
551void br_fdb_find_delete_local(struct net_bridge *br,
552 const struct net_bridge_port *p,
553 const unsigned char *addr, u16 vid);
554void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
555void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
556void br_fdb_cleanup(struct work_struct *work);
557void br_fdb_delete_by_port(struct net_bridge *br,
558 const struct net_bridge_port *p, u16 vid, int do_all);
559struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
560 const unsigned char *addr,
561 __u16 vid);
562int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
563int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
564 unsigned long off);
565int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
566 const unsigned char *addr, u16 vid);
567void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
568 const unsigned char *addr, u16 vid, bool added_by_user);
569
570int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
571 struct net_device *dev, const unsigned char *addr, u16 vid);
572int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
573 const unsigned char *addr, u16 vid, u16 nlh_flags,
574 struct netlink_ext_ack *extack);
575int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
576 struct net_device *dev, struct net_device *fdev, int *idx);
577int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
578 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
579 struct netlink_ext_ack *extack);
580int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
581void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
582int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
583 const unsigned char *addr, u16 vid,
584 bool swdev_notify);
585int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
586 const unsigned char *addr, u16 vid,
587 bool swdev_notify);
588void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
589 const unsigned char *addr, u16 vid, bool offloaded);
590
591
592enum br_pkt_type {
593 BR_PKT_UNICAST,
594 BR_PKT_MULTICAST,
595 BR_PKT_BROADCAST
596};
597int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
598void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
599 bool local_rcv, bool local_orig);
600int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
601void br_flood(struct net_bridge *br, struct sk_buff *skb,
602 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
603
604
605static inline bool br_skb_isolated(const struct net_bridge_port *to,
606 const struct sk_buff *skb)
607{
608 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
609 (to->flags & BR_ISOLATED);
610}
611
612
613void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
614int br_add_bridge(struct net *net, const char *name);
615int br_del_bridge(struct net *net, const char *name);
616int br_add_if(struct net_bridge *br, struct net_device *dev,
617 struct netlink_ext_ack *extack);
618int br_del_if(struct net_bridge *br, struct net_device *dev);
619void br_mtu_auto_adjust(struct net_bridge *br);
620netdev_features_t br_features_recompute(struct net_bridge *br,
621 netdev_features_t features);
622void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
623void br_manage_promisc(struct net_bridge *br);
624int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
625
626
627int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
628rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
629
630static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
631{
632 return rcu_dereference(dev->rx_handler) == br_handle_frame;
633}
634
635static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
636{
637 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
638}
639
640static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
641{
642 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
643}
644
645static inline struct net_bridge_port *
646br_port_get_check_rtnl(const struct net_device *dev)
647{
648 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
649}
650
651
652int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
653int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
654 void __user *arg);
655
656
657#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
658int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
659 struct sk_buff *skb, u16 vid);
660struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
661 struct sk_buff *skb, u16 vid);
662int br_multicast_add_port(struct net_bridge_port *port);
663void br_multicast_del_port(struct net_bridge_port *port);
664void br_multicast_enable_port(struct net_bridge_port *port);
665void br_multicast_disable_port(struct net_bridge_port *port);
666void br_multicast_init(struct net_bridge *br);
667void br_multicast_open(struct net_bridge *br);
668void br_multicast_stop(struct net_bridge *br);
669void br_multicast_dev_del(struct net_bridge *br);
670void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
671 struct sk_buff *skb, bool local_rcv, bool local_orig);
672int br_multicast_set_router(struct net_bridge *br, unsigned long val);
673int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
674int br_multicast_toggle(struct net_bridge *br, unsigned long val);
675int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
676int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
677int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
678#if IS_ENABLED(CONFIG_IPV6)
679int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
680#endif
681struct net_bridge_mdb_entry *
682br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
683struct net_bridge_mdb_entry *
684br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
685struct net_bridge_port_group *
686br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
687 struct net_bridge_port_group __rcu *next,
688 unsigned char flags, const unsigned char *src);
689int br_mdb_hash_init(struct net_bridge *br);
690void br_mdb_hash_fini(struct net_bridge *br);
691void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
692 struct br_ip *group, int type, u8 flags);
693void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
694 int type);
695void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
696 const struct sk_buff *skb, u8 type, u8 dir);
697int br_multicast_init_stats(struct net_bridge *br);
698void br_multicast_uninit_stats(struct net_bridge *br);
699void br_multicast_get_stats(const struct net_bridge *br,
700 const struct net_bridge_port *p,
701 struct br_mcast_stats *dest);
702void br_mdb_init(void);
703void br_mdb_uninit(void);
704
705#define mlock_dereference(X, br) \
706 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
707
708static inline bool br_multicast_is_router(struct net_bridge *br)
709{
710 return br->multicast_router == 2 ||
711 (br->multicast_router == 1 &&
712 timer_pending(&br->multicast_router_timer));
713}
714
715static inline bool
716__br_multicast_querier_exists(struct net_bridge *br,
717 struct bridge_mcast_other_query *querier,
718 const bool is_ipv6)
719{
720 bool own_querier_enabled;
721
722 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
723 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
724 own_querier_enabled = false;
725 else
726 own_querier_enabled = true;
727 } else {
728 own_querier_enabled = false;
729 }
730
731 return time_is_before_jiffies(querier->delay_time) &&
732 (own_querier_enabled || timer_pending(&querier->timer));
733}
734
735static inline bool br_multicast_querier_exists(struct net_bridge *br,
736 struct ethhdr *eth)
737{
738 switch (eth->h_proto) {
739 case (htons(ETH_P_IP)):
740 return __br_multicast_querier_exists(br,
741 &br->ip4_other_query, false);
742#if IS_ENABLED(CONFIG_IPV6)
743 case (htons(ETH_P_IPV6)):
744 return __br_multicast_querier_exists(br,
745 &br->ip6_other_query, true);
746#endif
747 default:
748 return false;
749 }
750}
751
752static inline int br_multicast_igmp_type(const struct sk_buff *skb)
753{
754 return BR_INPUT_SKB_CB(skb)->igmp;
755}
756#else
757static inline int br_multicast_rcv(struct net_bridge *br,
758 struct net_bridge_port *port,
759 struct sk_buff *skb,
760 u16 vid)
761{
762 return 0;
763}
764
765static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
766 struct sk_buff *skb, u16 vid)
767{
768 return NULL;
769}
770
771static inline int br_multicast_add_port(struct net_bridge_port *port)
772{
773 return 0;
774}
775
776static inline void br_multicast_del_port(struct net_bridge_port *port)
777{
778}
779
780static inline void br_multicast_enable_port(struct net_bridge_port *port)
781{
782}
783
784static inline void br_multicast_disable_port(struct net_bridge_port *port)
785{
786}
787
788static inline void br_multicast_init(struct net_bridge *br)
789{
790}
791
792static inline void br_multicast_open(struct net_bridge *br)
793{
794}
795
796static inline void br_multicast_stop(struct net_bridge *br)
797{
798}
799
800static inline void br_multicast_dev_del(struct net_bridge *br)
801{
802}
803
804static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
805 struct sk_buff *skb,
806 bool local_rcv, bool local_orig)
807{
808}
809
810static inline bool br_multicast_is_router(struct net_bridge *br)
811{
812 return false;
813}
814
815static inline bool br_multicast_querier_exists(struct net_bridge *br,
816 struct ethhdr *eth)
817{
818 return false;
819}
820
821static inline void br_mdb_init(void)
822{
823}
824
825static inline void br_mdb_uninit(void)
826{
827}
828
829static inline int br_mdb_hash_init(struct net_bridge *br)
830{
831 return 0;
832}
833
834static inline void br_mdb_hash_fini(struct net_bridge *br)
835{
836}
837
838static inline void br_multicast_count(struct net_bridge *br,
839 const struct net_bridge_port *p,
840 const struct sk_buff *skb,
841 u8 type, u8 dir)
842{
843}
844
845static inline int br_multicast_init_stats(struct net_bridge *br)
846{
847 return 0;
848}
849
850static inline void br_multicast_uninit_stats(struct net_bridge *br)
851{
852}
853
854static inline int br_multicast_igmp_type(const struct sk_buff *skb)
855{
856 return 0;
857}
858#endif
859
860
861#ifdef CONFIG_BRIDGE_VLAN_FILTERING
862bool br_allowed_ingress(const struct net_bridge *br,
863 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
864 u16 *vid);
865bool br_allowed_egress(struct net_bridge_vlan_group *vg,
866 const struct sk_buff *skb);
867bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
868struct sk_buff *br_handle_vlan(struct net_bridge *br,
869 const struct net_bridge_port *port,
870 struct net_bridge_vlan_group *vg,
871 struct sk_buff *skb);
872int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
873 bool *changed, struct netlink_ext_ack *extack);
874int br_vlan_delete(struct net_bridge *br, u16 vid);
875void br_vlan_flush(struct net_bridge *br);
876struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
877void br_recalculate_fwd_mask(struct net_bridge *br);
878int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
879int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
880int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
881int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
882int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
883int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
884int br_vlan_init(struct net_bridge *br);
885int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
886int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
887 struct netlink_ext_ack *extack);
888int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
889 bool *changed, struct netlink_ext_ack *extack);
890int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
891void nbp_vlan_flush(struct net_bridge_port *port);
892int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
893int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
894void br_vlan_get_stats(const struct net_bridge_vlan *v,
895 struct br_vlan_stats *stats);
896void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
897int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
898 void *ptr);
899
900static inline struct net_bridge_vlan_group *br_vlan_group(
901 const struct net_bridge *br)
902{
903 return rtnl_dereference(br->vlgrp);
904}
905
906static inline struct net_bridge_vlan_group *nbp_vlan_group(
907 const struct net_bridge_port *p)
908{
909 return rtnl_dereference(p->vlgrp);
910}
911
912static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
913 const struct net_bridge *br)
914{
915 return rcu_dereference(br->vlgrp);
916}
917
918static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
919 const struct net_bridge_port *p)
920{
921 return rcu_dereference(p->vlgrp);
922}
923
924
925
926
927static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
928{
929 int err = 0;
930
931 if (skb_vlan_tag_present(skb)) {
932 *vid = skb_vlan_tag_get_id(skb);
933 } else {
934 *vid = 0;
935 err = -EINVAL;
936 }
937
938 return err;
939}
940
941static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
942{
943 if (!vg)
944 return 0;
945
946 smp_rmb();
947 return vg->pvid;
948}
949
950#else
951static inline bool br_allowed_ingress(const struct net_bridge *br,
952 struct net_bridge_vlan_group *vg,
953 struct sk_buff *skb,
954 u16 *vid)
955{
956 return true;
957}
958
959static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
960 const struct sk_buff *skb)
961{
962 return true;
963}
964
965static inline bool br_should_learn(struct net_bridge_port *p,
966 struct sk_buff *skb, u16 *vid)
967{
968 return true;
969}
970
971static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
972 const struct net_bridge_port *port,
973 struct net_bridge_vlan_group *vg,
974 struct sk_buff *skb)
975{
976 return skb;
977}
978
979static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
980 bool *changed, struct netlink_ext_ack *extack)
981{
982 *changed = false;
983 return -EOPNOTSUPP;
984}
985
986static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
987{
988 return -EOPNOTSUPP;
989}
990
991static inline void br_vlan_flush(struct net_bridge *br)
992{
993}
994
995static inline void br_recalculate_fwd_mask(struct net_bridge *br)
996{
997}
998
999static inline int br_vlan_init(struct net_bridge *br)
1000{
1001 return 0;
1002}
1003
1004static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1005 bool *changed, struct netlink_ext_ack *extack)
1006{
1007 *changed = false;
1008 return -EOPNOTSUPP;
1009}
1010
1011static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1012{
1013 return -EOPNOTSUPP;
1014}
1015
1016static inline void nbp_vlan_flush(struct net_bridge_port *port)
1017{
1018}
1019
1020static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1021 u16 vid)
1022{
1023 return NULL;
1024}
1025
1026static inline int nbp_vlan_init(struct net_bridge_port *port,
1027 struct netlink_ext_ack *extack)
1028{
1029 return 0;
1030}
1031
1032static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1033{
1034 return 0;
1035}
1036
1037static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1038{
1039 return 0;
1040}
1041
1042static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1043 unsigned long val)
1044{
1045 return -EOPNOTSUPP;
1046}
1047
1048static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1049 u32 filter_mask)
1050{
1051 return 0;
1052}
1053
1054static inline struct net_bridge_vlan_group *br_vlan_group(
1055 const struct net_bridge *br)
1056{
1057 return NULL;
1058}
1059
1060static inline struct net_bridge_vlan_group *nbp_vlan_group(
1061 const struct net_bridge_port *p)
1062{
1063 return NULL;
1064}
1065
1066static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1067 const struct net_bridge *br)
1068{
1069 return NULL;
1070}
1071
1072static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1073 const struct net_bridge_port *p)
1074{
1075 return NULL;
1076}
1077
1078static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1079 struct br_vlan_stats *stats)
1080{
1081}
1082
1083static inline void br_vlan_port_event(struct net_bridge_port *p,
1084 unsigned long event)
1085{
1086}
1087
1088static inline int br_vlan_bridge_event(struct net_device *dev,
1089 unsigned long event, void *ptr)
1090{
1091 return 0;
1092}
1093#endif
1094
1095struct nf_br_ops {
1096 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1097};
1098extern const struct nf_br_ops __rcu *nf_br_ops;
1099
1100
1101#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1102int br_nf_core_init(void);
1103void br_nf_core_fini(void);
1104void br_netfilter_rtable_init(struct net_bridge *);
1105#else
1106static inline int br_nf_core_init(void) { return 0; }
1107static inline void br_nf_core_fini(void) {}
1108#define br_netfilter_rtable_init(x)
1109#endif
1110
1111
1112void br_set_state(struct net_bridge_port *p, unsigned int state);
1113struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1114void br_init_port(struct net_bridge_port *p);
1115void br_become_designated_port(struct net_bridge_port *p);
1116
1117void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1118int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1119int br_set_hello_time(struct net_bridge *br, unsigned long x);
1120int br_set_max_age(struct net_bridge *br, unsigned long x);
1121int __set_ageing_time(struct net_device *dev, unsigned long t);
1122int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1123
1124
1125
1126void br_stp_enable_bridge(struct net_bridge *br);
1127void br_stp_disable_bridge(struct net_bridge *br);
1128void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1129void br_stp_enable_port(struct net_bridge_port *p);
1130void br_stp_disable_port(struct net_bridge_port *p);
1131bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1132void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1133void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1134int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1135int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1136ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1137
1138
1139struct stp_proto;
1140void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1141 struct net_device *dev);
1142
1143
1144void br_stp_timer_init(struct net_bridge *br);
1145void br_stp_port_timer_init(struct net_bridge_port *p);
1146unsigned long br_timer_value(const struct timer_list *timer);
1147
1148
1149#if IS_ENABLED(CONFIG_ATM_LANE)
1150extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1151#endif
1152
1153
1154extern struct rtnl_link_ops br_link_ops;
1155int br_netlink_init(void);
1156void br_netlink_fini(void);
1157void br_ifinfo_notify(int event, const struct net_bridge *br,
1158 const struct net_bridge_port *port);
1159int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1160 struct netlink_ext_ack *extack);
1161int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1162int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1163 u32 filter_mask, int nlflags);
1164
1165#ifdef CONFIG_SYSFS
1166
1167extern const struct sysfs_ops brport_sysfs_ops;
1168int br_sysfs_addif(struct net_bridge_port *p);
1169int br_sysfs_renameif(struct net_bridge_port *p);
1170
1171
1172int br_sysfs_addbr(struct net_device *dev);
1173void br_sysfs_delbr(struct net_device *dev);
1174
1175#else
1176
1177static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1178static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1179static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1180static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1181#endif
1182
1183
1184#ifdef CONFIG_NET_SWITCHDEV
1185int nbp_switchdev_mark_set(struct net_bridge_port *p);
1186void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1187 struct sk_buff *skb);
1188bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1189 const struct sk_buff *skb);
1190int br_switchdev_set_port_flag(struct net_bridge_port *p,
1191 unsigned long flags,
1192 unsigned long mask);
1193void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1194 int type);
1195int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1196 struct netlink_ext_ack *extack);
1197int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1198
1199static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1200{
1201 skb->offload_fwd_mark = 0;
1202}
1203#else
1204static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1205{
1206 return 0;
1207}
1208
1209static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1210 struct sk_buff *skb)
1211{
1212}
1213
1214static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1215 const struct sk_buff *skb)
1216{
1217 return true;
1218}
1219
1220static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1221 unsigned long flags,
1222 unsigned long mask)
1223{
1224 return 0;
1225}
1226
1227static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1228 u16 vid, u16 flags,
1229 struct netlink_ext_ack *extack)
1230{
1231 return -EOPNOTSUPP;
1232}
1233
1234static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1235{
1236 return -EOPNOTSUPP;
1237}
1238
1239static inline void
1240br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1241{
1242}
1243
1244static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1245{
1246}
1247#endif
1248
1249
1250void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1251void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1252 u16 vid, struct net_bridge_port *p);
1253void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1254 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1255struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1256#endif
1257