2 * Linux ethernet bridge
5 * Lennert Buytenhek <buytenh@gnu.org>
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.
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>
25 #define BR_HASH_BITS 8
26 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
28 #define BR_HOLD_TIME (1*HZ)
30 #define BR_PORT_BITS 10
31 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
33 #define BR_VERSION "2.3"
35 /* Control of forwarding link local multicast */
36 #define BR_GROUPFWD_DEFAULT 0
37 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
38 #define BR_GROUPFWD_RESTRICTED 0x0007u
39 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
40 #define BR_GROUPFWD_8021AD 0xB801u
42 /* Path to usermode spanning tree program */
43 #define BR_STP_PROG "/sbin/bridge-stp"
45 typedef struct bridge_id bridge_id;
46 typedef struct mac_addr mac_addr;
47 typedef __u16 port_id;
51 unsigned char prio[2];
52 unsigned char addr[ETH_ALEN];
57 unsigned char addr[ETH_ALEN];
60 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
62 struct bridge_mcast_own_query {
63 struct timer_list timer;
68 struct bridge_mcast_other_query {
69 struct timer_list timer;
70 unsigned long delay_time;
73 /* selected querier */
74 struct bridge_mcast_querier {
76 struct net_bridge_port __rcu *port;
79 /* IGMP/MLD statistics */
80 struct bridge_mcast_stats {
81 struct br_mcast_stats mstats;
82 struct u64_stats_sync syncp;
86 struct br_vlan_stats {
91 struct u64_stats_sync syncp;
95 * struct net_bridge_vlan - per-vlan entry
97 * @vnode: rhashtable member
99 * @flags: bridge vlan flags
100 * @stats: per-cpu VLAN statistics
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
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.
114 struct net_bridge_vlan {
115 struct rhash_head vnode;
118 struct br_vlan_stats __percpu *stats;
120 struct net_bridge *br;
121 struct net_bridge_port *port;
125 struct net_bridge_vlan *brvlan;
127 struct list_head vlist;
133 * struct net_bridge_vlan_group
135 * @vlan_hash: VLAN entry rhashtable
136 * @vlan_list: sorted VLAN entry list
137 * @num_vlans: number of total VLAN entries
138 * @pvid: PVID VLAN id
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
146 struct net_bridge_vlan_group {
147 struct rhashtable vlan_hash;
148 struct list_head vlan_list;
153 struct net_bridge_fdb_entry
155 struct hlist_node hlist;
156 struct net_bridge_port *dst;
158 unsigned long updated;
162 unsigned char is_local:1,
165 added_by_external_learn:1;
169 #define MDB_PG_FLAGS_PERMANENT BIT(0)
170 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
172 struct net_bridge_port_group {
173 struct net_bridge_port *port;
174 struct net_bridge_port_group __rcu *next;
175 struct hlist_node mglist;
177 struct timer_list timer;
182 struct net_bridge_mdb_entry
184 struct hlist_node hlist[2];
185 struct net_bridge *br;
186 struct net_bridge_port_group __rcu *ports;
188 struct timer_list timer;
193 struct net_bridge_mdb_htable
195 struct hlist_head *mhash;
197 struct net_bridge_mdb_htable *old;
204 struct net_bridge_port
206 struct net_bridge *br;
207 struct net_device *dev;
208 struct list_head list;
214 unsigned char topology_change_ack;
215 unsigned char config_pending;
217 port_id designated_port;
218 bridge_id designated_root;
219 bridge_id designated_bridge;
222 unsigned long designated_age;
224 struct timer_list forward_delay_timer;
225 struct timer_list hold_timer;
226 struct timer_list message_age_timer;
232 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
233 struct bridge_mcast_own_query ip4_own_query;
234 #if IS_ENABLED(CONFIG_IPV6)
235 struct bridge_mcast_own_query ip6_own_query;
236 #endif /* IS_ENABLED(CONFIG_IPV6) */
237 unsigned char multicast_router;
238 struct bridge_mcast_stats __percpu *mcast_stats;
239 struct timer_list multicast_router_timer;
240 struct hlist_head mglist;
241 struct hlist_node rlist;
245 char sysfs_name[IFNAMSIZ];
248 #ifdef CONFIG_NET_POLL_CONTROLLER
251 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
252 struct net_bridge_vlan_group __rcu *vlgrp;
256 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
257 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
259 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
261 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
263 return rcu_dereference(dev->rx_handler_data);
266 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
268 return br_port_exists(dev) ?
269 rtnl_dereference(dev->rx_handler_data) : NULL;
275 struct list_head port_list;
276 struct net_device *dev;
278 struct pcpu_sw_netstats __percpu *stats;
279 spinlock_t hash_lock;
280 struct hlist_head hash[BR_HASH_SIZE];
281 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
283 struct rtable fake_rtable;
284 struct rt6_info fake_rt6_info;
286 bool nf_call_iptables;
287 bool nf_call_ip6tables;
288 bool nf_call_arptables;
291 u16 group_fwd_mask_required;
294 bridge_id designated_root;
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;
305 u8 group_addr[ETH_ALEN];
310 BR_NO_STP, /* no spanning tree */
311 BR_KERNEL_STP, /* old STP in kernel */
312 BR_USER_STP, /* new RSTP in userspace */
315 unsigned char topology_change;
316 unsigned char topology_change_detected;
318 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
319 unsigned char multicast_router;
321 u8 multicast_disabled:1;
322 u8 multicast_querier:1;
323 u8 multicast_query_use_ifaddr:1;
325 u8 multicast_stats_enabled:1;
330 u32 multicast_last_member_count;
331 u32 multicast_startup_query_count;
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;
340 spinlock_t multicast_lock;
341 struct net_bridge_mdb_htable __rcu *mdb;
342 struct hlist_head router_list;
344 struct timer_list multicast_router_timer;
345 struct bridge_mcast_other_query ip4_other_query;
346 struct bridge_mcast_own_query ip4_own_query;
347 struct bridge_mcast_querier ip4_querier;
348 struct bridge_mcast_stats __percpu *mcast_stats;
349 #if IS_ENABLED(CONFIG_IPV6)
350 struct bridge_mcast_other_query ip6_other_query;
351 struct bridge_mcast_own_query ip6_own_query;
352 struct bridge_mcast_querier ip6_querier;
353 #endif /* IS_ENABLED(CONFIG_IPV6) */
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;
360 struct kobject *ifobj;
362 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
363 struct net_bridge_vlan_group __rcu *vlgrp;
365 u8 vlan_stats_enabled;
371 struct br_input_skb_cb {
372 struct net_device *brdev;
374 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
379 bool proxyarp_replied;
381 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
386 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
388 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
389 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
391 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
394 #define br_printk(level, br, format, args...) \
395 printk(level "%s: " format, (br)->dev->name, ##args)
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)
406 #define br_debug(br, format, args...) \
407 pr_debug("%s: " format, (br)->dev->name, ##args)
409 /* called under bridge lock */
410 static inline int br_is_root_bridge(const struct net_bridge *br)
412 return !memcmp(&br->bridge_id, &br->designated_root, 8);
415 /* check if a VLAN entry is global */
416 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
418 return v->flags & BRIDGE_VLAN_INFO_MASTER;
421 /* check if a VLAN entry is used by the bridge */
422 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
424 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
427 /* check if we should use the vlan entry, returns false if it's only context */
428 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
430 if (br_vlan_is_master(v)) {
431 if (br_vlan_is_brentry(v))
441 void br_dev_setup(struct net_device *dev);
442 void br_dev_delete(struct net_device *dev, struct list_head *list);
443 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
444 #ifdef CONFIG_NET_POLL_CONTROLLER
445 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
448 struct netpoll *np = p->np;
451 netpoll_send_skb(np, skb);
454 int br_netpoll_enable(struct net_bridge_port *p);
455 void br_netpoll_disable(struct net_bridge_port *p);
457 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
462 static inline int br_netpoll_enable(struct net_bridge_port *p)
467 static inline void br_netpoll_disable(struct net_bridge_port *p)
473 int br_fdb_init(void);
474 void br_fdb_fini(void);
475 void br_fdb_flush(struct net_bridge *br);
476 void br_fdb_find_delete_local(struct net_bridge *br,
477 const struct net_bridge_port *p,
478 const unsigned char *addr, u16 vid);
479 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
480 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
481 void br_fdb_cleanup(unsigned long arg);
482 void br_fdb_delete_by_port(struct net_bridge *br,
483 const struct net_bridge_port *p, u16 vid, int do_all);
484 struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
485 const unsigned char *addr, __u16 vid);
486 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
487 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
489 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
490 const unsigned char *addr, u16 vid);
491 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
492 const unsigned char *addr, u16 vid, bool added_by_user);
494 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
495 struct net_device *dev, const unsigned char *addr, u16 vid);
496 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
497 const unsigned char *addr, u16 vid, u16 nlh_flags);
498 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
499 struct net_device *dev, struct net_device *fdev, int idx);
500 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
501 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
502 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
503 const unsigned char *addr, u16 vid);
504 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
505 const unsigned char *addr, u16 vid);
508 void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
509 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
510 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
512 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
513 void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
514 void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
515 bool local_rcv, bool unicast);
518 void br_port_carrier_check(struct net_bridge_port *p);
519 int br_add_bridge(struct net *net, const char *name);
520 int br_del_bridge(struct net *net, const char *name);
521 int br_add_if(struct net_bridge *br, struct net_device *dev);
522 int br_del_if(struct net_bridge *br, struct net_device *dev);
523 int br_min_mtu(const struct net_bridge *br);
524 netdev_features_t br_features_recompute(struct net_bridge *br,
525 netdev_features_t features);
526 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
527 void br_manage_promisc(struct net_bridge *br);
530 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
531 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
533 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
535 return rcu_dereference(dev->rx_handler) == br_handle_frame;
538 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
540 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
544 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
545 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
549 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
550 extern unsigned int br_mdb_rehash_seq;
551 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
552 struct sk_buff *skb, u16 vid);
553 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
554 struct sk_buff *skb, u16 vid);
555 int br_multicast_add_port(struct net_bridge_port *port);
556 void br_multicast_del_port(struct net_bridge_port *port);
557 void br_multicast_enable_port(struct net_bridge_port *port);
558 void br_multicast_disable_port(struct net_bridge_port *port);
559 void br_multicast_init(struct net_bridge *br);
560 void br_multicast_open(struct net_bridge *br);
561 void br_multicast_stop(struct net_bridge *br);
562 void br_multicast_dev_del(struct net_bridge *br);
563 void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
564 struct sk_buff *skb);
565 void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
566 struct sk_buff *skb, bool local_rcv);
567 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
568 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
569 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
570 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
571 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
572 struct net_bridge_mdb_entry *
573 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
574 struct net_bridge_mdb_entry *
575 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
576 struct br_ip *group);
577 void br_multicast_free_pg(struct rcu_head *head);
578 struct net_bridge_port_group *
579 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
580 struct net_bridge_port_group __rcu *next,
581 unsigned char flags);
582 void br_mdb_init(void);
583 void br_mdb_uninit(void);
584 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
585 struct br_ip *group, int type, u8 flags);
586 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
588 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
589 const struct sk_buff *skb, u8 type, u8 dir);
590 int br_multicast_init_stats(struct net_bridge *br);
591 void br_multicast_get_stats(const struct net_bridge *br,
592 const struct net_bridge_port *p,
593 struct br_mcast_stats *dest);
595 #define mlock_dereference(X, br) \
596 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
598 static inline bool br_multicast_is_router(struct net_bridge *br)
600 return br->multicast_router == 2 ||
601 (br->multicast_router == 1 &&
602 timer_pending(&br->multicast_router_timer));
606 __br_multicast_querier_exists(struct net_bridge *br,
607 struct bridge_mcast_other_query *querier,
610 bool own_querier_enabled;
612 if (br->multicast_querier) {
613 if (is_ipv6 && !br->has_ipv6_addr)
614 own_querier_enabled = false;
616 own_querier_enabled = true;
618 own_querier_enabled = false;
621 return time_is_before_jiffies(querier->delay_time) &&
622 (own_querier_enabled || timer_pending(&querier->timer));
625 static inline bool br_multicast_querier_exists(struct net_bridge *br,
628 switch (eth->h_proto) {
629 case (htons(ETH_P_IP)):
630 return __br_multicast_querier_exists(br,
631 &br->ip4_other_query, false);
632 #if IS_ENABLED(CONFIG_IPV6)
633 case (htons(ETH_P_IPV6)):
634 return __br_multicast_querier_exists(br,
635 &br->ip6_other_query, true);
642 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
644 return BR_INPUT_SKB_CB(skb)->igmp;
647 static inline int br_multicast_rcv(struct net_bridge *br,
648 struct net_bridge_port *port,
655 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
656 struct sk_buff *skb, u16 vid)
661 static inline int br_multicast_add_port(struct net_bridge_port *port)
666 static inline void br_multicast_del_port(struct net_bridge_port *port)
670 static inline void br_multicast_enable_port(struct net_bridge_port *port)
674 static inline void br_multicast_disable_port(struct net_bridge_port *port)
678 static inline void br_multicast_init(struct net_bridge *br)
682 static inline void br_multicast_open(struct net_bridge *br)
686 static inline void br_multicast_stop(struct net_bridge *br)
690 static inline void br_multicast_dev_del(struct net_bridge *br)
694 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
699 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
704 static inline bool br_multicast_is_router(struct net_bridge *br)
708 static inline bool br_multicast_querier_exists(struct net_bridge *br,
713 static inline void br_mdb_init(void)
716 static inline void br_mdb_uninit(void)
720 static inline void br_multicast_count(struct net_bridge *br,
721 const struct net_bridge_port *p,
722 const struct sk_buff *skb,
727 static inline int br_multicast_init_stats(struct net_bridge *br)
732 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
739 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
740 bool br_allowed_ingress(const struct net_bridge *br,
741 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
743 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
744 const struct sk_buff *skb);
745 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
746 struct sk_buff *br_handle_vlan(struct net_bridge *br,
747 struct net_bridge_vlan_group *vg,
748 struct sk_buff *skb);
749 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
750 int br_vlan_delete(struct net_bridge *br, u16 vid);
751 void br_vlan_flush(struct net_bridge *br);
752 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
753 void br_recalculate_fwd_mask(struct net_bridge *br);
754 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
755 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
756 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
757 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
758 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
759 int br_vlan_init(struct net_bridge *br);
760 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
761 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
762 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
763 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
764 void nbp_vlan_flush(struct net_bridge_port *port);
765 int nbp_vlan_init(struct net_bridge_port *port);
766 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
767 void br_vlan_get_stats(const struct net_bridge_vlan *v,
768 struct br_vlan_stats *stats);
770 static inline struct net_bridge_vlan_group *br_vlan_group(
771 const struct net_bridge *br)
773 return rtnl_dereference(br->vlgrp);
776 static inline struct net_bridge_vlan_group *nbp_vlan_group(
777 const struct net_bridge_port *p)
779 return rtnl_dereference(p->vlgrp);
782 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
783 const struct net_bridge *br)
785 return rcu_dereference(br->vlgrp);
788 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
789 const struct net_bridge_port *p)
791 return rcu_dereference(p->vlgrp);
794 /* Since bridge now depends on 8021Q module, but the time bridge sees the
795 * skb, the vlan tag will always be present if the frame was tagged.
797 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
801 if (skb_vlan_tag_present(skb)) {
802 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
811 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
820 static inline int br_vlan_enabled(struct net_bridge *br)
822 return br->vlan_enabled;
825 static inline bool br_allowed_ingress(const struct net_bridge *br,
826 struct net_bridge_vlan_group *vg,
833 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
834 const struct sk_buff *skb)
839 static inline bool br_should_learn(struct net_bridge_port *p,
840 struct sk_buff *skb, u16 *vid)
845 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
846 struct net_bridge_vlan_group *vg,
852 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
857 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
862 static inline void br_vlan_flush(struct net_bridge *br)
866 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
870 static inline int br_vlan_init(struct net_bridge *br)
875 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
880 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
885 static inline void nbp_vlan_flush(struct net_bridge_port *port)
889 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
895 static inline int nbp_vlan_init(struct net_bridge_port *port)
900 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
905 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
910 static inline int br_vlan_enabled(struct net_bridge *br)
915 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
921 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
927 static inline struct net_bridge_vlan_group *br_vlan_group(
928 const struct net_bridge *br)
933 static inline struct net_bridge_vlan_group *nbp_vlan_group(
934 const struct net_bridge_port *p)
939 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
940 const struct net_bridge *br)
945 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
946 const struct net_bridge_port *p)
951 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
952 struct br_vlan_stats *stats)
958 int (*br_dev_xmit_hook)(struct sk_buff *skb);
960 extern const struct nf_br_ops __rcu *nf_br_ops;
963 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
964 int br_nf_core_init(void);
965 void br_nf_core_fini(void);
966 void br_netfilter_rtable_init(struct net_bridge *);
968 static inline int br_nf_core_init(void) { return 0; }
969 static inline void br_nf_core_fini(void) {}
970 #define br_netfilter_rtable_init(x)
974 void br_set_state(struct net_bridge_port *p, unsigned int state);
975 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
976 void br_init_port(struct net_bridge_port *p);
977 void br_become_designated_port(struct net_bridge_port *p);
979 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
980 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
981 int br_set_hello_time(struct net_bridge *br, unsigned long x);
982 int br_set_max_age(struct net_bridge *br, unsigned long x);
983 int br_set_ageing_time(struct net_bridge *br, u32 ageing_time);
987 void br_stp_enable_bridge(struct net_bridge *br);
988 void br_stp_disable_bridge(struct net_bridge *br);
989 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
990 void br_stp_enable_port(struct net_bridge_port *p);
991 void br_stp_disable_port(struct net_bridge_port *p);
992 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
993 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
994 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
995 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
996 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
997 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1001 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1002 struct net_device *dev);
1004 /* br_stp_timer.c */
1005 void br_stp_timer_init(struct net_bridge *br);
1006 void br_stp_port_timer_init(struct net_bridge_port *p);
1007 unsigned long br_timer_value(const struct timer_list *timer);
1010 #if IS_ENABLED(CONFIG_ATM_LANE)
1011 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1015 extern struct rtnl_link_ops br_link_ops;
1016 int br_netlink_init(void);
1017 void br_netlink_fini(void);
1018 void br_ifinfo_notify(int event, struct net_bridge_port *port);
1019 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1020 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1021 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1022 u32 filter_mask, int nlflags);
1026 extern const struct sysfs_ops brport_sysfs_ops;
1027 int br_sysfs_addif(struct net_bridge_port *p);
1028 int br_sysfs_renameif(struct net_bridge_port *p);
1031 int br_sysfs_addbr(struct net_device *dev);
1032 void br_sysfs_delbr(struct net_device *dev);
1036 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1037 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1038 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1039 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1040 #endif /* CONFIG_SYSFS */