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13#ifndef _BR_PRIVATE_H
14#define _BR_PRIVATE_H
15
16#include <linux/netdevice.h>
17#include <linux/if_bridge.h>
18#include <linux/netpoll.h>
19#include <linux/u64_stats_sync.h>
20#include <net/route.h>
21#include <net/ip6_fib.h>
22#include <linux/if_vlan.h>
23#include <linux/rhashtable.h>
24#include <linux/refcount.h>
25
26#define BR_HASH_BITS 8
27#define BR_HASH_SIZE (1 << BR_HASH_BITS)
28
29#define BR_HOLD_TIME (1*HZ)
30
31#define BR_PORT_BITS 10
32#define BR_MAX_PORTS (1<<BR_PORT_BITS)
33
34#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
35
36#define BR_VERSION "2.3"
37
38
39#define BR_GROUPFWD_DEFAULT 0
40
41enum {
42 BR_GROUPFWD_STP = BIT(0),
43 BR_GROUPFWD_MACPAUSE = BIT(1),
44 BR_GROUPFWD_LACP = BIT(2),
45};
46
47#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
48 BR_GROUPFWD_LACP)
49
50#define BR_GROUPFWD_8021AD 0xB801u
51
52
53#define BR_STP_PROG "/sbin/bridge-stp"
54
55typedef struct bridge_id bridge_id;
56typedef struct mac_addr mac_addr;
57typedef __u16 port_id;
58
59struct bridge_id {
60 unsigned char prio[2];
61 unsigned char addr[ETH_ALEN];
62};
63
64struct mac_addr {
65 unsigned char addr[ETH_ALEN];
66};
67
68#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
69
70struct bridge_mcast_own_query {
71 struct timer_list timer;
72 u32 startup_sent;
73};
74
75
76struct bridge_mcast_other_query {
77 struct timer_list timer;
78 unsigned long delay_time;
79};
80
81
82struct bridge_mcast_querier {
83 struct br_ip addr;
84 struct net_bridge_port __rcu *port;
85};
86
87
88struct bridge_mcast_stats {
89 struct br_mcast_stats mstats;
90 struct u64_stats_sync syncp;
91};
92#endif
93
94struct br_vlan_stats {
95 u64 rx_bytes;
96 u64 rx_packets;
97 u64 tx_bytes;
98 u64 tx_packets;
99 struct u64_stats_sync syncp;
100};
101
102struct br_tunnel_info {
103 __be64 tunnel_id;
104 struct metadata_dst *tunnel_dst;
105};
106
107
108enum {
109 BR_VLFLAG_PER_PORT_STATS = BIT(0),
110 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
111};
112
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133
134struct net_bridge_vlan {
135 struct rhash_head vnode;
136 struct rhash_head tnode;
137 u16 vid;
138 u16 flags;
139 u16 priv_flags;
140 struct br_vlan_stats __percpu *stats;
141 union {
142 struct net_bridge *br;
143 struct net_bridge_port *port;
144 };
145 union {
146 refcount_t refcnt;
147 struct net_bridge_vlan *brvlan;
148 };
149
150 struct br_tunnel_info tinfo;
151
152 struct list_head vlist;
153
154 struct rcu_head rcu;
155};
156
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170
171struct net_bridge_vlan_group {
172 struct rhashtable vlan_hash;
173 struct rhashtable tunnel_hash;
174 struct list_head vlan_list;
175 u16 num_vlans;
176 u16 pvid;
177};
178
179struct net_bridge_fdb_key {
180 mac_addr addr;
181 u16 vlan_id;
182};
183
184struct net_bridge_fdb_entry {
185 struct rhash_head rhnode;
186 struct net_bridge_port *dst;
187
188 struct net_bridge_fdb_key key;
189 struct hlist_node fdb_node;
190 unsigned char is_local:1,
191 is_static:1,
192 is_sticky:1,
193 added_by_user:1,
194 added_by_external_learn:1,
195 offloaded:1;
196
197
198 unsigned long updated ____cacheline_aligned_in_smp;
199 unsigned long used;
200
201 struct rcu_head rcu;
202};
203
204#define MDB_PG_FLAGS_PERMANENT BIT(0)
205#define MDB_PG_FLAGS_OFFLOAD BIT(1)
206
207struct net_bridge_port_group {
208 struct net_bridge_port *port;
209 struct net_bridge_port_group __rcu *next;
210 struct hlist_node mglist;
211 struct rcu_head rcu;
212 struct timer_list timer;
213 struct br_ip addr;
214 unsigned char flags;
215 unsigned char eth_addr[ETH_ALEN];
216};
217
218struct net_bridge_mdb_entry {
219 struct rhash_head rhnode;
220 struct net_bridge *br;
221 struct net_bridge_port_group __rcu *ports;
222 struct rcu_head rcu;
223 struct timer_list timer;
224 struct br_ip addr;
225 bool host_joined;
226 struct hlist_node mdb_node;
227};
228
229struct net_bridge_port {
230 struct net_bridge *br;
231 struct net_device *dev;
232 struct list_head list;
233
234 unsigned long flags;
235#ifdef CONFIG_BRIDGE_VLAN_FILTERING
236 struct net_bridge_vlan_group __rcu *vlgrp;
237#endif
238
239
240 u8 priority;
241 u8 state;
242 u16 port_no;
243 unsigned char topology_change_ack;
244 unsigned char config_pending;
245 port_id port_id;
246 port_id designated_port;
247 bridge_id designated_root;
248 bridge_id designated_bridge;
249 u32 path_cost;
250 u32 designated_cost;
251 unsigned long designated_age;
252
253 struct timer_list forward_delay_timer;
254 struct timer_list hold_timer;
255 struct timer_list message_age_timer;
256 struct kobject kobj;
257 struct rcu_head rcu;
258
259#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
260 struct bridge_mcast_own_query ip4_own_query;
261#if IS_ENABLED(CONFIG_IPV6)
262 struct bridge_mcast_own_query ip6_own_query;
263#endif
264 unsigned char multicast_router;
265 struct bridge_mcast_stats __percpu *mcast_stats;
266 struct timer_list multicast_router_timer;
267 struct hlist_head mglist;
268 struct hlist_node rlist;
269#endif
270
271#ifdef CONFIG_SYSFS
272 char sysfs_name[IFNAMSIZ];
273#endif
274
275#ifdef CONFIG_NET_POLL_CONTROLLER
276 struct netpoll *np;
277#endif
278#ifdef CONFIG_NET_SWITCHDEV
279 int offload_fwd_mark;
280#endif
281 u16 group_fwd_mask;
282};
283
284#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
285#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
286
287#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
288
289static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
290{
291 return rcu_dereference(dev->rx_handler_data);
292}
293
294static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
295{
296 return br_port_exists(dev) ?
297 rtnl_dereference(dev->rx_handler_data) : NULL;
298}
299
300static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
301{
302 return br_port_exists(dev) ?
303 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
304}
305
306enum net_bridge_opts {
307 BROPT_VLAN_ENABLED,
308 BROPT_VLAN_STATS_ENABLED,
309 BROPT_NF_CALL_IPTABLES,
310 BROPT_NF_CALL_IP6TABLES,
311 BROPT_NF_CALL_ARPTABLES,
312 BROPT_GROUP_ADDR_SET,
313 BROPT_MULTICAST_ENABLED,
314 BROPT_MULTICAST_QUERIER,
315 BROPT_MULTICAST_QUERY_USE_IFADDR,
316 BROPT_MULTICAST_STATS_ENABLED,
317 BROPT_HAS_IPV6_ADDR,
318 BROPT_NEIGH_SUPPRESS_ENABLED,
319 BROPT_MTU_SET_BY_USER,
320 BROPT_VLAN_STATS_PER_PORT,
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#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
425 int igmp;
426 int mrouters_only;
427#endif
428
429 bool proxyarp_replied;
430 bool src_port_isolated;
431
432#ifdef CONFIG_BRIDGE_VLAN_FILTERING
433 bool vlan_filtered;
434#endif
435
436#ifdef CONFIG_NET_SWITCHDEV
437 int offload_fwd_mark;
438#endif
439};
440
441#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
442
443#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
444# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
445#else
446# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
447#endif
448
449#define br_printk(level, br, format, args...) \
450 printk(level "%s: " format, (br)->dev->name, ##args)
451
452#define br_err(__br, format, args...) \
453 br_printk(KERN_ERR, __br, format, ##args)
454#define br_warn(__br, format, args...) \
455 br_printk(KERN_WARNING, __br, format, ##args)
456#define br_notice(__br, format, args...) \
457 br_printk(KERN_NOTICE, __br, format, ##args)
458#define br_info(__br, format, args...) \
459 br_printk(KERN_INFO, __br, format, ##args)
460
461#define br_debug(br, format, args...) \
462 pr_debug("%s: " format, (br)->dev->name, ##args)
463
464
465static inline int br_is_root_bridge(const struct net_bridge *br)
466{
467 return !memcmp(&br->bridge_id, &br->designated_root, 8);
468}
469
470
471static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
472{
473 return v->flags & BRIDGE_VLAN_INFO_MASTER;
474}
475
476
477static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
478{
479 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
480}
481
482
483static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
484{
485 if (br_vlan_is_master(v)) {
486 if (br_vlan_is_brentry(v))
487 return true;
488 else
489 return false;
490 }
491
492 return true;
493}
494
495static inline int br_opt_get(const struct net_bridge *br,
496 enum net_bridge_opts opt)
497{
498 return test_bit(opt, &br->options);
499}
500
501void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
502
503
504void br_dev_setup(struct net_device *dev);
505void br_dev_delete(struct net_device *dev, struct list_head *list);
506netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
507#ifdef CONFIG_NET_POLL_CONTROLLER
508static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
509 struct sk_buff *skb)
510{
511 netpoll_send_skb(p->np, skb);
512}
513
514int br_netpoll_enable(struct net_bridge_port *p);
515void br_netpoll_disable(struct net_bridge_port *p);
516#else
517static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
518 struct sk_buff *skb)
519{
520}
521
522static inline int br_netpoll_enable(struct net_bridge_port *p)
523{
524 return 0;
525}
526
527static inline void br_netpoll_disable(struct net_bridge_port *p)
528{
529}
530#endif
531
532
533int br_fdb_init(void);
534void br_fdb_fini(void);
535int br_fdb_hash_init(struct net_bridge *br);
536void br_fdb_hash_fini(struct net_bridge *br);
537void br_fdb_flush(struct net_bridge *br);
538void br_fdb_find_delete_local(struct net_bridge *br,
539 const struct net_bridge_port *p,
540 const unsigned char *addr, u16 vid);
541void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
542void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
543void br_fdb_cleanup(struct work_struct *work);
544void br_fdb_delete_by_port(struct net_bridge *br,
545 const struct net_bridge_port *p, u16 vid, int do_all);
546struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
547 const unsigned char *addr,
548 __u16 vid);
549int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
550int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
551 unsigned long off);
552int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
553 const unsigned char *addr, u16 vid);
554void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
555 const unsigned char *addr, u16 vid, bool added_by_user);
556
557int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
558 struct net_device *dev, const unsigned char *addr, u16 vid);
559int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
560 const unsigned char *addr, u16 vid, u16 nlh_flags,
561 struct netlink_ext_ack *extack);
562int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
563 struct net_device *dev, struct net_device *fdev, int *idx);
564int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
565 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
566 struct netlink_ext_ack *extack);
567int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
568void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
569int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
570 const unsigned char *addr, u16 vid,
571 bool swdev_notify);
572int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
573 const unsigned char *addr, u16 vid,
574 bool swdev_notify);
575void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
576 const unsigned char *addr, u16 vid, bool offloaded);
577
578
579enum br_pkt_type {
580 BR_PKT_UNICAST,
581 BR_PKT_MULTICAST,
582 BR_PKT_BROADCAST
583};
584int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
585void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
586 bool local_rcv, bool local_orig);
587int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
588void br_flood(struct net_bridge *br, struct sk_buff *skb,
589 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
590
591
592static inline bool br_skb_isolated(const struct net_bridge_port *to,
593 const struct sk_buff *skb)
594{
595 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
596 (to->flags & BR_ISOLATED);
597}
598
599
600void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
601int br_add_bridge(struct net *net, const char *name);
602int br_del_bridge(struct net *net, const char *name);
603int br_add_if(struct net_bridge *br, struct net_device *dev,
604 struct netlink_ext_ack *extack);
605int br_del_if(struct net_bridge *br, struct net_device *dev);
606void br_mtu_auto_adjust(struct net_bridge *br);
607netdev_features_t br_features_recompute(struct net_bridge *br,
608 netdev_features_t features);
609void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
610void br_manage_promisc(struct net_bridge *br);
611
612
613int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
614rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
615
616static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
617{
618 return rcu_dereference(dev->rx_handler) == br_handle_frame;
619}
620
621static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
622{
623 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
624}
625
626static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
627{
628 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
629}
630
631static inline struct net_bridge_port *
632br_port_get_check_rtnl(const struct net_device *dev)
633{
634 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
635}
636
637
638int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
639int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
640 void __user *arg);
641
642
643#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
644int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
645 struct sk_buff *skb, u16 vid);
646struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
647 struct sk_buff *skb, u16 vid);
648int br_multicast_add_port(struct net_bridge_port *port);
649void br_multicast_del_port(struct net_bridge_port *port);
650void br_multicast_enable_port(struct net_bridge_port *port);
651void br_multicast_disable_port(struct net_bridge_port *port);
652void br_multicast_init(struct net_bridge *br);
653void br_multicast_open(struct net_bridge *br);
654void br_multicast_stop(struct net_bridge *br);
655void br_multicast_dev_del(struct net_bridge *br);
656void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
657 struct sk_buff *skb, bool local_rcv, bool local_orig);
658int br_multicast_set_router(struct net_bridge *br, unsigned long val);
659int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
660int br_multicast_toggle(struct net_bridge *br, unsigned long val);
661int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
662int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
663int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
664#if IS_ENABLED(CONFIG_IPV6)
665int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
666#endif
667struct net_bridge_mdb_entry *
668br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
669struct net_bridge_mdb_entry *
670br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
671struct net_bridge_port_group *
672br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
673 struct net_bridge_port_group __rcu *next,
674 unsigned char flags, const unsigned char *src);
675int br_mdb_hash_init(struct net_bridge *br);
676void br_mdb_hash_fini(struct net_bridge *br);
677void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
678 struct br_ip *group, int type, u8 flags);
679void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
680 int type);
681void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
682 const struct sk_buff *skb, u8 type, u8 dir);
683int br_multicast_init_stats(struct net_bridge *br);
684void br_multicast_uninit_stats(struct net_bridge *br);
685void br_multicast_get_stats(const struct net_bridge *br,
686 const struct net_bridge_port *p,
687 struct br_mcast_stats *dest);
688void br_mdb_init(void);
689void br_mdb_uninit(void);
690
691#define mlock_dereference(X, br) \
692 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
693
694static inline bool br_multicast_is_router(struct net_bridge *br)
695{
696 return br->multicast_router == 2 ||
697 (br->multicast_router == 1 &&
698 timer_pending(&br->multicast_router_timer));
699}
700
701static inline bool
702__br_multicast_querier_exists(struct net_bridge *br,
703 struct bridge_mcast_other_query *querier,
704 const bool is_ipv6)
705{
706 bool own_querier_enabled;
707
708 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
709 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
710 own_querier_enabled = false;
711 else
712 own_querier_enabled = true;
713 } else {
714 own_querier_enabled = false;
715 }
716
717 return time_is_before_jiffies(querier->delay_time) &&
718 (own_querier_enabled || timer_pending(&querier->timer));
719}
720
721static inline bool br_multicast_querier_exists(struct net_bridge *br,
722 struct ethhdr *eth)
723{
724 switch (eth->h_proto) {
725 case (htons(ETH_P_IP)):
726 return __br_multicast_querier_exists(br,
727 &br->ip4_other_query, false);
728#if IS_ENABLED(CONFIG_IPV6)
729 case (htons(ETH_P_IPV6)):
730 return __br_multicast_querier_exists(br,
731 &br->ip6_other_query, true);
732#endif
733 default:
734 return false;
735 }
736}
737
738static inline int br_multicast_igmp_type(const struct sk_buff *skb)
739{
740 return BR_INPUT_SKB_CB(skb)->igmp;
741}
742#else
743static inline int br_multicast_rcv(struct net_bridge *br,
744 struct net_bridge_port *port,
745 struct sk_buff *skb,
746 u16 vid)
747{
748 return 0;
749}
750
751static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
752 struct sk_buff *skb, u16 vid)
753{
754 return NULL;
755}
756
757static inline int br_multicast_add_port(struct net_bridge_port *port)
758{
759 return 0;
760}
761
762static inline void br_multicast_del_port(struct net_bridge_port *port)
763{
764}
765
766static inline void br_multicast_enable_port(struct net_bridge_port *port)
767{
768}
769
770static inline void br_multicast_disable_port(struct net_bridge_port *port)
771{
772}
773
774static inline void br_multicast_init(struct net_bridge *br)
775{
776}
777
778static inline void br_multicast_open(struct net_bridge *br)
779{
780}
781
782static inline void br_multicast_stop(struct net_bridge *br)
783{
784}
785
786static inline void br_multicast_dev_del(struct net_bridge *br)
787{
788}
789
790static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
791 struct sk_buff *skb,
792 bool local_rcv, bool local_orig)
793{
794}
795
796static inline bool br_multicast_is_router(struct net_bridge *br)
797{
798 return false;
799}
800
801static inline bool br_multicast_querier_exists(struct net_bridge *br,
802 struct ethhdr *eth)
803{
804 return false;
805}
806
807static inline void br_mdb_init(void)
808{
809}
810
811static inline void br_mdb_uninit(void)
812{
813}
814
815static inline int br_mdb_hash_init(struct net_bridge *br)
816{
817 return 0;
818}
819
820static inline void br_mdb_hash_fini(struct net_bridge *br)
821{
822}
823
824static inline void br_multicast_count(struct net_bridge *br,
825 const struct net_bridge_port *p,
826 const struct sk_buff *skb,
827 u8 type, u8 dir)
828{
829}
830
831static inline int br_multicast_init_stats(struct net_bridge *br)
832{
833 return 0;
834}
835
836static inline void br_multicast_uninit_stats(struct net_bridge *br)
837{
838}
839
840static inline int br_multicast_igmp_type(const struct sk_buff *skb)
841{
842 return 0;
843}
844#endif
845
846
847#ifdef CONFIG_BRIDGE_VLAN_FILTERING
848bool br_allowed_ingress(const struct net_bridge *br,
849 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
850 u16 *vid);
851bool br_allowed_egress(struct net_bridge_vlan_group *vg,
852 const struct sk_buff *skb);
853bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
854struct sk_buff *br_handle_vlan(struct net_bridge *br,
855 const struct net_bridge_port *port,
856 struct net_bridge_vlan_group *vg,
857 struct sk_buff *skb);
858int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
859 bool *changed, struct netlink_ext_ack *extack);
860int br_vlan_delete(struct net_bridge *br, u16 vid);
861void br_vlan_flush(struct net_bridge *br);
862struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
863void br_recalculate_fwd_mask(struct net_bridge *br);
864int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
865int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
866int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
867int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
868int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
869int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
870int br_vlan_init(struct net_bridge *br);
871int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
872int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
873 struct netlink_ext_ack *extack);
874int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
875 bool *changed, struct netlink_ext_ack *extack);
876int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
877void nbp_vlan_flush(struct net_bridge_port *port);
878int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
879int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
880void br_vlan_get_stats(const struct net_bridge_vlan *v,
881 struct br_vlan_stats *stats);
882
883static inline struct net_bridge_vlan_group *br_vlan_group(
884 const struct net_bridge *br)
885{
886 return rtnl_dereference(br->vlgrp);
887}
888
889static inline struct net_bridge_vlan_group *nbp_vlan_group(
890 const struct net_bridge_port *p)
891{
892 return rtnl_dereference(p->vlgrp);
893}
894
895static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
896 const struct net_bridge *br)
897{
898 return rcu_dereference(br->vlgrp);
899}
900
901static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
902 const struct net_bridge_port *p)
903{
904 return rcu_dereference(p->vlgrp);
905}
906
907
908
909
910static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
911{
912 int err = 0;
913
914 if (skb_vlan_tag_present(skb)) {
915 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
916 } else {
917 *vid = 0;
918 err = -EINVAL;
919 }
920
921 return err;
922}
923
924static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
925{
926 if (!vg)
927 return 0;
928
929 smp_rmb();
930 return vg->pvid;
931}
932
933#else
934static inline bool br_allowed_ingress(const struct net_bridge *br,
935 struct net_bridge_vlan_group *vg,
936 struct sk_buff *skb,
937 u16 *vid)
938{
939 return true;
940}
941
942static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
943 const struct sk_buff *skb)
944{
945 return true;
946}
947
948static inline bool br_should_learn(struct net_bridge_port *p,
949 struct sk_buff *skb, u16 *vid)
950{
951 return true;
952}
953
954static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
955 const struct net_bridge_port *port,
956 struct net_bridge_vlan_group *vg,
957 struct sk_buff *skb)
958{
959 return skb;
960}
961
962static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
963 bool *changed, struct netlink_ext_ack *extack)
964{
965 *changed = false;
966 return -EOPNOTSUPP;
967}
968
969static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
970{
971 return -EOPNOTSUPP;
972}
973
974static inline void br_vlan_flush(struct net_bridge *br)
975{
976}
977
978static inline void br_recalculate_fwd_mask(struct net_bridge *br)
979{
980}
981
982static inline int br_vlan_init(struct net_bridge *br)
983{
984 return 0;
985}
986
987static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
988 bool *changed, struct netlink_ext_ack *extack)
989{
990 *changed = false;
991 return -EOPNOTSUPP;
992}
993
994static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
995{
996 return -EOPNOTSUPP;
997}
998
999static inline void nbp_vlan_flush(struct net_bridge_port *port)
1000{
1001}
1002
1003static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1004 u16 vid)
1005{
1006 return NULL;
1007}
1008
1009static inline int nbp_vlan_init(struct net_bridge_port *port,
1010 struct netlink_ext_ack *extack)
1011{
1012 return 0;
1013}
1014
1015static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1016{
1017 return 0;
1018}
1019
1020static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1021{
1022 return 0;
1023}
1024
1025static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1026 unsigned long val)
1027{
1028 return -EOPNOTSUPP;
1029}
1030
1031static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1032 u32 filter_mask)
1033{
1034 return 0;
1035}
1036
1037static inline struct net_bridge_vlan_group *br_vlan_group(
1038 const struct net_bridge *br)
1039{
1040 return NULL;
1041}
1042
1043static inline struct net_bridge_vlan_group *nbp_vlan_group(
1044 const struct net_bridge_port *p)
1045{
1046 return NULL;
1047}
1048
1049static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1050 const struct net_bridge *br)
1051{
1052 return NULL;
1053}
1054
1055static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1056 const struct net_bridge_port *p)
1057{
1058 return NULL;
1059}
1060
1061static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1062 struct br_vlan_stats *stats)
1063{
1064}
1065#endif
1066
1067struct nf_br_ops {
1068 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1069};
1070extern const struct nf_br_ops __rcu *nf_br_ops;
1071
1072
1073#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1074int br_nf_core_init(void);
1075void br_nf_core_fini(void);
1076void br_netfilter_rtable_init(struct net_bridge *);
1077#else
1078static inline int br_nf_core_init(void) { return 0; }
1079static inline void br_nf_core_fini(void) {}
1080#define br_netfilter_rtable_init(x)
1081#endif
1082
1083
1084void br_set_state(struct net_bridge_port *p, unsigned int state);
1085struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1086void br_init_port(struct net_bridge_port *p);
1087void br_become_designated_port(struct net_bridge_port *p);
1088
1089void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1090int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1091int br_set_hello_time(struct net_bridge *br, unsigned long x);
1092int br_set_max_age(struct net_bridge *br, unsigned long x);
1093int __set_ageing_time(struct net_device *dev, unsigned long t);
1094int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1095
1096
1097
1098void br_stp_enable_bridge(struct net_bridge *br);
1099void br_stp_disable_bridge(struct net_bridge *br);
1100void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1101void br_stp_enable_port(struct net_bridge_port *p);
1102void br_stp_disable_port(struct net_bridge_port *p);
1103bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1104void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1105void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1106int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1107int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1108ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1109
1110
1111struct stp_proto;
1112void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1113 struct net_device *dev);
1114
1115
1116void br_stp_timer_init(struct net_bridge *br);
1117void br_stp_port_timer_init(struct net_bridge_port *p);
1118unsigned long br_timer_value(const struct timer_list *timer);
1119
1120
1121#if IS_ENABLED(CONFIG_ATM_LANE)
1122extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1123#endif
1124
1125
1126extern struct rtnl_link_ops br_link_ops;
1127int br_netlink_init(void);
1128void br_netlink_fini(void);
1129void br_ifinfo_notify(int event, const struct net_bridge *br,
1130 const struct net_bridge_port *port);
1131int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1132 struct netlink_ext_ack *extack);
1133int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1134int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1135 u32 filter_mask, int nlflags);
1136
1137#ifdef CONFIG_SYSFS
1138
1139extern const struct sysfs_ops brport_sysfs_ops;
1140int br_sysfs_addif(struct net_bridge_port *p);
1141int br_sysfs_renameif(struct net_bridge_port *p);
1142
1143
1144int br_sysfs_addbr(struct net_device *dev);
1145void br_sysfs_delbr(struct net_device *dev);
1146
1147#else
1148
1149static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1150static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1151static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1152static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1153#endif
1154
1155
1156#ifdef CONFIG_NET_SWITCHDEV
1157int nbp_switchdev_mark_set(struct net_bridge_port *p);
1158void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1159 struct sk_buff *skb);
1160bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1161 const struct sk_buff *skb);
1162int br_switchdev_set_port_flag(struct net_bridge_port *p,
1163 unsigned long flags,
1164 unsigned long mask);
1165void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1166 int type);
1167int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1168 struct netlink_ext_ack *extack);
1169int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1170
1171static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1172{
1173 skb->offload_fwd_mark = 0;
1174}
1175#else
1176static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1177{
1178 return 0;
1179}
1180
1181static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1182 struct sk_buff *skb)
1183{
1184}
1185
1186static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1187 const struct sk_buff *skb)
1188{
1189 return true;
1190}
1191
1192static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1193 unsigned long flags,
1194 unsigned long mask)
1195{
1196 return 0;
1197}
1198
1199static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1200 u16 vid, u16 flags,
1201 struct netlink_ext_ack *extack)
1202{
1203 return -EOPNOTSUPP;
1204}
1205
1206static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1207{
1208 return -EOPNOTSUPP;
1209}
1210
1211static inline void
1212br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1213{
1214}
1215
1216static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1217{
1218}
1219#endif
1220
1221
1222void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1223void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1224 u16 vid, struct net_bridge_port *p);
1225void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1226 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1227struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1228#endif
1229