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>
24 #include <linux/refcount.h>
26 #define BR_HASH_BITS 8
27 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
29 #define BR_HOLD_TIME (1*HZ)
31 #define BR_PORT_BITS 10
32 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
34 #define BR_VERSION "2.3"
36 /* Control of forwarding link local multicast */
37 #define BR_GROUPFWD_DEFAULT 0
38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
40 BR_GROUPFWD_STP = BIT(0),
41 BR_GROUPFWD_MACPAUSE = BIT(1),
42 BR_GROUPFWD_LACP = BIT(2),
45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
48 #define BR_GROUPFWD_8021AD 0xB801u
50 /* Path to usermode spanning tree program */
51 #define BR_STP_PROG "/sbin/bridge-stp"
53 typedef struct bridge_id bridge_id;
54 typedef struct mac_addr mac_addr;
55 typedef __u16 port_id;
59 unsigned char prio[2];
60 unsigned char addr[ETH_ALEN];
65 unsigned char addr[ETH_ALEN];
68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
70 struct bridge_mcast_own_query {
71 struct timer_list timer;
76 struct bridge_mcast_other_query {
77 struct timer_list timer;
78 unsigned long delay_time;
81 /* selected querier */
82 struct bridge_mcast_querier {
84 struct net_bridge_port __rcu *port;
87 /* IGMP/MLD statistics */
88 struct bridge_mcast_stats {
89 struct br_mcast_stats mstats;
90 struct u64_stats_sync syncp;
94 struct br_vlan_stats {
99 struct u64_stats_sync syncp;
102 struct br_tunnel_info {
104 struct metadata_dst *tunnel_dst;
108 * struct net_bridge_vlan - per-vlan entry
110 * @vnode: rhashtable member
112 * @flags: bridge vlan flags
113 * @stats: per-cpu VLAN statistics
114 * @br: if MASTER flag set, this points to a bridge struct
115 * @port: if MASTER flag unset, this points to a port struct
116 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
117 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
118 * for this VLAN entry
119 * @vlist: sorted list of VLAN entries
120 * @rcu: used for entry destruction
122 * This structure is shared between the global per-VLAN entries contained in
123 * the bridge rhashtable and the local per-port per-VLAN entries contained in
124 * the port's rhashtable. The union entries should be interpreted depending on
125 * the entry flags that are set.
127 struct net_bridge_vlan {
128 struct rhash_head vnode;
129 struct rhash_head tnode;
132 struct br_vlan_stats __percpu *stats;
134 struct net_bridge *br;
135 struct net_bridge_port *port;
139 struct net_bridge_vlan *brvlan;
142 struct br_tunnel_info tinfo;
144 struct list_head vlist;
150 * struct net_bridge_vlan_group
152 * @vlan_hash: VLAN entry rhashtable
153 * @vlan_list: sorted VLAN entry list
154 * @num_vlans: number of total VLAN entries
155 * @pvid: PVID VLAN id
157 * IMPORTANT: Be careful when checking if there're VLAN entries using list
158 * primitives because the bridge can have entries in its list which
159 * are just for global context but not for filtering, i.e. they have
160 * the master flag set but not the brentry flag. If you have to check
161 * if there're "real" entries in the bridge please test @num_vlans
163 struct net_bridge_vlan_group {
164 struct rhashtable vlan_hash;
165 struct rhashtable tunnel_hash;
166 struct list_head vlan_list;
171 struct net_bridge_fdb_key {
176 struct net_bridge_fdb_entry {
177 struct rhash_head rhnode;
178 struct net_bridge_port *dst;
180 struct net_bridge_fdb_key key;
181 struct hlist_node fdb_node;
182 unsigned char is_local:1,
185 added_by_external_learn:1,
188 /* write-heavy members should not affect lookups */
189 unsigned long updated ____cacheline_aligned_in_smp;
195 #define MDB_PG_FLAGS_PERMANENT BIT(0)
196 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
198 struct net_bridge_port_group {
199 struct net_bridge_port *port;
200 struct net_bridge_port_group __rcu *next;
201 struct hlist_node mglist;
203 struct timer_list timer;
206 unsigned char eth_addr[ETH_ALEN];
209 struct net_bridge_mdb_entry
211 struct hlist_node hlist[2];
212 struct net_bridge *br;
213 struct net_bridge_port_group __rcu *ports;
215 struct timer_list timer;
220 struct net_bridge_mdb_htable
222 struct hlist_head *mhash;
224 struct net_bridge_mdb_htable *old;
231 struct net_bridge_port {
232 struct net_bridge *br;
233 struct net_device *dev;
234 struct list_head list;
237 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
238 struct net_bridge_vlan_group __rcu *vlgrp;
245 unsigned char topology_change_ack;
246 unsigned char config_pending;
248 port_id designated_port;
249 bridge_id designated_root;
250 bridge_id designated_bridge;
253 unsigned long designated_age;
255 struct timer_list forward_delay_timer;
256 struct timer_list hold_timer;
257 struct timer_list message_age_timer;
261 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
262 struct bridge_mcast_own_query ip4_own_query;
263 #if IS_ENABLED(CONFIG_IPV6)
264 struct bridge_mcast_own_query ip6_own_query;
265 #endif /* IS_ENABLED(CONFIG_IPV6) */
266 unsigned char multicast_router;
267 struct bridge_mcast_stats __percpu *mcast_stats;
268 struct timer_list multicast_router_timer;
269 struct hlist_head mglist;
270 struct hlist_node rlist;
274 char sysfs_name[IFNAMSIZ];
277 #ifdef CONFIG_NET_POLL_CONTROLLER
280 #ifdef CONFIG_NET_SWITCHDEV
281 int offload_fwd_mark;
286 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
287 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
289 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
291 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
293 return rcu_dereference(dev->rx_handler_data);
296 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
298 return br_port_exists(dev) ?
299 rtnl_dereference(dev->rx_handler_data) : NULL;
302 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
304 return br_port_exists(dev) ?
305 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
310 spinlock_t hash_lock;
311 struct list_head port_list;
312 struct net_device *dev;
313 struct pcpu_sw_netstats __percpu *stats;
314 /* These fields are accessed on each packet */
315 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
317 u8 vlan_stats_enabled;
320 struct net_bridge_vlan_group __rcu *vlgrp;
323 struct rhashtable fdb_hash_tbl;
324 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
326 struct rtable fake_rtable;
327 struct rt6_info fake_rt6_info;
329 bool nf_call_iptables;
330 bool nf_call_ip6tables;
331 bool nf_call_arptables;
334 u16 group_fwd_mask_required;
337 bridge_id designated_root;
340 unsigned char topology_change;
341 unsigned char topology_change_detected;
343 unsigned long max_age;
344 unsigned long hello_time;
345 unsigned long forward_delay;
346 unsigned long ageing_time;
347 unsigned long bridge_max_age;
348 unsigned long bridge_hello_time;
349 unsigned long bridge_forward_delay;
350 unsigned long bridge_ageing_time;
352 u8 group_addr[ETH_ALEN];
356 BR_NO_STP, /* no spanning tree */
357 BR_KERNEL_STP, /* old STP in kernel */
358 BR_USER_STP, /* new RSTP in userspace */
361 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
362 unsigned char multicast_router;
364 u8 multicast_disabled:1;
365 u8 multicast_querier:1;
366 u8 multicast_query_use_ifaddr:1;
368 u8 multicast_stats_enabled:1;
373 u32 multicast_last_member_count;
374 u32 multicast_startup_query_count;
376 u8 multicast_igmp_version;
378 unsigned long multicast_last_member_interval;
379 unsigned long multicast_membership_interval;
380 unsigned long multicast_querier_interval;
381 unsigned long multicast_query_interval;
382 unsigned long multicast_query_response_interval;
383 unsigned long multicast_startup_query_interval;
385 spinlock_t multicast_lock;
386 struct net_bridge_mdb_htable __rcu *mdb;
387 struct hlist_head router_list;
389 struct timer_list multicast_router_timer;
390 struct bridge_mcast_other_query ip4_other_query;
391 struct bridge_mcast_own_query ip4_own_query;
392 struct bridge_mcast_querier ip4_querier;
393 struct bridge_mcast_stats __percpu *mcast_stats;
394 #if IS_ENABLED(CONFIG_IPV6)
395 struct bridge_mcast_other_query ip6_other_query;
396 struct bridge_mcast_own_query ip6_own_query;
397 struct bridge_mcast_querier ip6_querier;
398 u8 multicast_mld_version;
399 #endif /* IS_ENABLED(CONFIG_IPV6) */
402 struct timer_list hello_timer;
403 struct timer_list tcn_timer;
404 struct timer_list topology_change_timer;
405 struct delayed_work gc_work;
406 struct kobject *ifobj;
409 #ifdef CONFIG_NET_SWITCHDEV
410 int offload_fwd_mark;
412 bool neigh_suppress_enabled;
413 bool mtu_set_by_user;
414 struct hlist_head fdb_list;
417 struct br_input_skb_cb {
418 struct net_device *brdev;
420 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
425 bool proxyarp_replied;
427 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
431 #ifdef CONFIG_NET_SWITCHDEV
432 int offload_fwd_mark;
436 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
438 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
439 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
441 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
444 #define br_printk(level, br, format, args...) \
445 printk(level "%s: " format, (br)->dev->name, ##args)
447 #define br_err(__br, format, args...) \
448 br_printk(KERN_ERR, __br, format, ##args)
449 #define br_warn(__br, format, args...) \
450 br_printk(KERN_WARNING, __br, format, ##args)
451 #define br_notice(__br, format, args...) \
452 br_printk(KERN_NOTICE, __br, format, ##args)
453 #define br_info(__br, format, args...) \
454 br_printk(KERN_INFO, __br, format, ##args)
456 #define br_debug(br, format, args...) \
457 pr_debug("%s: " format, (br)->dev->name, ##args)
459 /* called under bridge lock */
460 static inline int br_is_root_bridge(const struct net_bridge *br)
462 return !memcmp(&br->bridge_id, &br->designated_root, 8);
465 /* check if a VLAN entry is global */
466 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
468 return v->flags & BRIDGE_VLAN_INFO_MASTER;
471 /* check if a VLAN entry is used by the bridge */
472 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
474 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
477 /* check if we should use the vlan entry, returns false if it's only context */
478 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
480 if (br_vlan_is_master(v)) {
481 if (br_vlan_is_brentry(v))
491 void br_dev_setup(struct net_device *dev);
492 void br_dev_delete(struct net_device *dev, struct list_head *list);
493 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
494 #ifdef CONFIG_NET_POLL_CONTROLLER
495 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
498 struct netpoll *np = p->np;
501 netpoll_send_skb(np, skb);
504 int br_netpoll_enable(struct net_bridge_port *p);
505 void br_netpoll_disable(struct net_bridge_port *p);
507 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
512 static inline int br_netpoll_enable(struct net_bridge_port *p)
517 static inline void br_netpoll_disable(struct net_bridge_port *p)
523 int br_fdb_init(void);
524 void br_fdb_fini(void);
525 int br_fdb_hash_init(struct net_bridge *br);
526 void br_fdb_hash_fini(struct net_bridge *br);
527 void br_fdb_flush(struct net_bridge *br);
528 void br_fdb_find_delete_local(struct net_bridge *br,
529 const struct net_bridge_port *p,
530 const unsigned char *addr, u16 vid);
531 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
532 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
533 void br_fdb_cleanup(struct work_struct *work);
534 void br_fdb_delete_by_port(struct net_bridge *br,
535 const struct net_bridge_port *p, u16 vid, int do_all);
536 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
537 const unsigned char *addr,
539 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
540 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
542 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
543 const unsigned char *addr, u16 vid);
544 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
545 const unsigned char *addr, u16 vid, bool added_by_user);
547 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
548 struct net_device *dev, const unsigned char *addr, u16 vid);
549 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
550 const unsigned char *addr, u16 vid, u16 nlh_flags);
551 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
552 struct net_device *dev, struct net_device *fdev, int *idx);
553 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
554 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
555 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
556 const unsigned char *addr, u16 vid);
557 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
558 const unsigned char *addr, u16 vid);
559 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
560 const unsigned char *addr, u16 vid);
568 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
569 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
570 bool local_rcv, bool local_orig);
571 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
572 void br_flood(struct net_bridge *br, struct sk_buff *skb,
573 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
576 void br_port_carrier_check(struct net_bridge_port *p);
577 int br_add_bridge(struct net *net, const char *name);
578 int br_del_bridge(struct net *net, const char *name);
579 int br_add_if(struct net_bridge *br, struct net_device *dev,
580 struct netlink_ext_ack *extack);
581 int br_del_if(struct net_bridge *br, struct net_device *dev);
582 void br_mtu_auto_adjust(struct net_bridge *br);
583 netdev_features_t br_features_recompute(struct net_bridge *br,
584 netdev_features_t features);
585 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
586 void br_manage_promisc(struct net_bridge *br);
589 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
590 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
592 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
594 return rcu_dereference(dev->rx_handler) == br_handle_frame;
597 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
599 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
603 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
604 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
608 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
609 extern unsigned int br_mdb_rehash_seq;
610 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
611 struct sk_buff *skb, u16 vid);
612 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
613 struct sk_buff *skb, u16 vid);
614 int br_multicast_add_port(struct net_bridge_port *port);
615 void br_multicast_del_port(struct net_bridge_port *port);
616 void br_multicast_enable_port(struct net_bridge_port *port);
617 void br_multicast_disable_port(struct net_bridge_port *port);
618 void br_multicast_init(struct net_bridge *br);
619 void br_multicast_open(struct net_bridge *br);
620 void br_multicast_stop(struct net_bridge *br);
621 void br_multicast_dev_del(struct net_bridge *br);
622 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
623 struct sk_buff *skb, bool local_rcv, bool local_orig);
624 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
625 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
626 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
627 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
628 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
629 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
630 #if IS_ENABLED(CONFIG_IPV6)
631 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
633 struct net_bridge_mdb_entry *
634 br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
635 struct net_bridge_mdb_entry *
636 br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
637 struct br_ip *group);
638 void br_multicast_free_pg(struct rcu_head *head);
639 struct net_bridge_port_group *
640 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
641 struct net_bridge_port_group __rcu *next,
642 unsigned char flags, const unsigned char *src);
643 void br_mdb_init(void);
644 void br_mdb_uninit(void);
645 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
646 struct br_ip *group, int type, u8 flags);
647 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
649 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
650 const struct sk_buff *skb, u8 type, u8 dir);
651 int br_multicast_init_stats(struct net_bridge *br);
652 void br_multicast_uninit_stats(struct net_bridge *br);
653 void br_multicast_get_stats(const struct net_bridge *br,
654 const struct net_bridge_port *p,
655 struct br_mcast_stats *dest);
657 #define mlock_dereference(X, br) \
658 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
660 static inline bool br_multicast_is_router(struct net_bridge *br)
662 return br->multicast_router == 2 ||
663 (br->multicast_router == 1 &&
664 timer_pending(&br->multicast_router_timer));
668 __br_multicast_querier_exists(struct net_bridge *br,
669 struct bridge_mcast_other_query *querier,
672 bool own_querier_enabled;
674 if (br->multicast_querier) {
675 if (is_ipv6 && !br->has_ipv6_addr)
676 own_querier_enabled = false;
678 own_querier_enabled = true;
680 own_querier_enabled = false;
683 return time_is_before_jiffies(querier->delay_time) &&
684 (own_querier_enabled || timer_pending(&querier->timer));
687 static inline bool br_multicast_querier_exists(struct net_bridge *br,
690 switch (eth->h_proto) {
691 case (htons(ETH_P_IP)):
692 return __br_multicast_querier_exists(br,
693 &br->ip4_other_query, false);
694 #if IS_ENABLED(CONFIG_IPV6)
695 case (htons(ETH_P_IPV6)):
696 return __br_multicast_querier_exists(br,
697 &br->ip6_other_query, true);
704 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
706 return BR_INPUT_SKB_CB(skb)->igmp;
709 static inline int br_multicast_rcv(struct net_bridge *br,
710 struct net_bridge_port *port,
717 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
718 struct sk_buff *skb, u16 vid)
723 static inline int br_multicast_add_port(struct net_bridge_port *port)
728 static inline void br_multicast_del_port(struct net_bridge_port *port)
732 static inline void br_multicast_enable_port(struct net_bridge_port *port)
736 static inline void br_multicast_disable_port(struct net_bridge_port *port)
740 static inline void br_multicast_init(struct net_bridge *br)
744 static inline void br_multicast_open(struct net_bridge *br)
748 static inline void br_multicast_stop(struct net_bridge *br)
752 static inline void br_multicast_dev_del(struct net_bridge *br)
756 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
758 bool local_rcv, bool local_orig)
762 static inline bool br_multicast_is_router(struct net_bridge *br)
767 static inline bool br_multicast_querier_exists(struct net_bridge *br,
773 static inline void br_mdb_init(void)
777 static inline void br_mdb_uninit(void)
781 static inline void br_multicast_count(struct net_bridge *br,
782 const struct net_bridge_port *p,
783 const struct sk_buff *skb,
788 static inline int br_multicast_init_stats(struct net_bridge *br)
793 static inline void br_multicast_uninit_stats(struct net_bridge *br)
797 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
804 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
805 bool br_allowed_ingress(const struct net_bridge *br,
806 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
808 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
809 const struct sk_buff *skb);
810 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
811 struct sk_buff *br_handle_vlan(struct net_bridge *br,
812 const struct net_bridge_port *port,
813 struct net_bridge_vlan_group *vg,
814 struct sk_buff *skb);
815 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
817 int br_vlan_delete(struct net_bridge *br, u16 vid);
818 void br_vlan_flush(struct net_bridge *br);
819 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
820 void br_recalculate_fwd_mask(struct net_bridge *br);
821 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
822 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
823 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
824 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
825 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
826 int br_vlan_init(struct net_bridge *br);
827 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
828 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
829 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
831 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
832 void nbp_vlan_flush(struct net_bridge_port *port);
833 int nbp_vlan_init(struct net_bridge_port *port);
834 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
835 void br_vlan_get_stats(const struct net_bridge_vlan *v,
836 struct br_vlan_stats *stats);
838 static inline struct net_bridge_vlan_group *br_vlan_group(
839 const struct net_bridge *br)
841 return rtnl_dereference(br->vlgrp);
844 static inline struct net_bridge_vlan_group *nbp_vlan_group(
845 const struct net_bridge_port *p)
847 return rtnl_dereference(p->vlgrp);
850 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
851 const struct net_bridge *br)
853 return rcu_dereference(br->vlgrp);
856 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
857 const struct net_bridge_port *p)
859 return rcu_dereference(p->vlgrp);
862 /* Since bridge now depends on 8021Q module, but the time bridge sees the
863 * skb, the vlan tag will always be present if the frame was tagged.
865 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
869 if (skb_vlan_tag_present(skb)) {
870 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
879 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
889 static inline bool br_allowed_ingress(const struct net_bridge *br,
890 struct net_bridge_vlan_group *vg,
897 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
898 const struct sk_buff *skb)
903 static inline bool br_should_learn(struct net_bridge_port *p,
904 struct sk_buff *skb, u16 *vid)
909 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
910 const struct net_bridge_port *port,
911 struct net_bridge_vlan_group *vg,
917 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
924 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
929 static inline void br_vlan_flush(struct net_bridge *br)
933 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
937 static inline int br_vlan_init(struct net_bridge *br)
942 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
949 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
954 static inline void nbp_vlan_flush(struct net_bridge_port *port)
958 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
964 static inline int nbp_vlan_init(struct net_bridge_port *port)
969 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
974 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
979 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
985 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
991 static inline struct net_bridge_vlan_group *br_vlan_group(
992 const struct net_bridge *br)
997 static inline struct net_bridge_vlan_group *nbp_vlan_group(
998 const struct net_bridge_port *p)
1003 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1004 const struct net_bridge *br)
1009 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1010 const struct net_bridge_port *p)
1015 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1016 struct br_vlan_stats *stats)
1022 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1024 extern const struct nf_br_ops __rcu *nf_br_ops;
1026 /* br_netfilter.c */
1027 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1028 int br_nf_core_init(void);
1029 void br_nf_core_fini(void);
1030 void br_netfilter_rtable_init(struct net_bridge *);
1032 static inline int br_nf_core_init(void) { return 0; }
1033 static inline void br_nf_core_fini(void) {}
1034 #define br_netfilter_rtable_init(x)
1038 void br_set_state(struct net_bridge_port *p, unsigned int state);
1039 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1040 void br_init_port(struct net_bridge_port *p);
1041 void br_become_designated_port(struct net_bridge_port *p);
1043 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1044 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1045 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1046 int br_set_max_age(struct net_bridge *br, unsigned long x);
1047 int __set_ageing_time(struct net_device *dev, unsigned long t);
1048 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1052 void br_stp_enable_bridge(struct net_bridge *br);
1053 void br_stp_disable_bridge(struct net_bridge *br);
1054 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1055 void br_stp_enable_port(struct net_bridge_port *p);
1056 void br_stp_disable_port(struct net_bridge_port *p);
1057 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1058 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1059 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1060 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1061 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1062 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1066 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1067 struct net_device *dev);
1069 /* br_stp_timer.c */
1070 void br_stp_timer_init(struct net_bridge *br);
1071 void br_stp_port_timer_init(struct net_bridge_port *p);
1072 unsigned long br_timer_value(const struct timer_list *timer);
1075 #if IS_ENABLED(CONFIG_ATM_LANE)
1076 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1080 extern struct rtnl_link_ops br_link_ops;
1081 int br_netlink_init(void);
1082 void br_netlink_fini(void);
1083 void br_ifinfo_notify(int event, const struct net_bridge *br,
1084 const struct net_bridge_port *port);
1085 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1086 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1087 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1088 u32 filter_mask, int nlflags);
1092 extern const struct sysfs_ops brport_sysfs_ops;
1093 int br_sysfs_addif(struct net_bridge_port *p);
1094 int br_sysfs_renameif(struct net_bridge_port *p);
1097 int br_sysfs_addbr(struct net_device *dev);
1098 void br_sysfs_delbr(struct net_device *dev);
1102 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1103 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1104 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1105 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1106 #endif /* CONFIG_SYSFS */
1108 /* br_switchdev.c */
1109 #ifdef CONFIG_NET_SWITCHDEV
1110 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1111 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1112 struct sk_buff *skb);
1113 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1114 const struct sk_buff *skb);
1115 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1116 unsigned long flags,
1117 unsigned long mask);
1118 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1121 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1123 skb->offload_fwd_mark = 0;
1126 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1131 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1132 struct sk_buff *skb)
1136 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1137 const struct sk_buff *skb)
1142 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1143 unsigned long flags,
1150 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1154 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1157 #endif /* CONFIG_NET_SWITCHDEV */
1159 /* br_arp_nd_proxy.c */
1160 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1161 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1162 u16 vid, struct net_bridge_port *p);
1163 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1164 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1165 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);