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_MULTICAST_DEFAULT_HASH_MAX 4096
36 #define BR_VERSION "2.3"
38 /* Control of forwarding link local multicast */
39 #define BR_GROUPFWD_DEFAULT 0
40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
42 BR_GROUPFWD_STP = BIT(0),
43 BR_GROUPFWD_MACPAUSE = BIT(1),
44 BR_GROUPFWD_LACP = BIT(2),
47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
50 #define BR_GROUPFWD_8021AD 0xB801u
52 /* Path to usermode spanning tree program */
53 #define BR_STP_PROG "/sbin/bridge-stp"
55 typedef struct bridge_id bridge_id;
56 typedef struct mac_addr mac_addr;
57 typedef __u16 port_id;
60 unsigned char prio[2];
61 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;
107 /* private vlan flags */
109 BR_VLFLAG_PER_PORT_STATS = BIT(0),
110 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
114 * struct net_bridge_vlan - per-vlan entry
116 * @vnode: rhashtable member
118 * @flags: bridge vlan flags
119 * @priv_flags: private (in-kernel) bridge vlan flags
120 * @stats: per-cpu VLAN statistics
121 * @br: if MASTER flag set, this points to a bridge struct
122 * @port: if MASTER flag unset, this points to a port struct
123 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
124 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
125 * for this VLAN entry
126 * @vlist: sorted list of VLAN entries
127 * @rcu: used for entry destruction
129 * This structure is shared between the global per-VLAN entries contained in
130 * the bridge rhashtable and the local per-port per-VLAN entries contained in
131 * the port's rhashtable. The union entries should be interpreted depending on
132 * the entry flags that are set.
134 struct net_bridge_vlan {
135 struct rhash_head vnode;
136 struct rhash_head tnode;
140 struct br_vlan_stats __percpu *stats;
142 struct net_bridge *br;
143 struct net_bridge_port *port;
147 struct net_bridge_vlan *brvlan;
150 struct br_tunnel_info tinfo;
152 struct list_head vlist;
158 * struct net_bridge_vlan_group
160 * @vlan_hash: VLAN entry rhashtable
161 * @vlan_list: sorted VLAN entry list
162 * @num_vlans: number of total VLAN entries
163 * @pvid: PVID VLAN id
165 * IMPORTANT: Be careful when checking if there're VLAN entries using list
166 * primitives because the bridge can have entries in its list which
167 * are just for global context but not for filtering, i.e. they have
168 * the master flag set but not the brentry flag. If you have to check
169 * if there're "real" entries in the bridge please test @num_vlans
171 struct net_bridge_vlan_group {
172 struct rhashtable vlan_hash;
173 struct rhashtable tunnel_hash;
174 struct list_head vlan_list;
179 struct net_bridge_fdb_key {
184 struct net_bridge_fdb_entry {
185 struct rhash_head rhnode;
186 struct net_bridge_port *dst;
188 struct net_bridge_fdb_key key;
189 struct hlist_node fdb_node;
190 unsigned char is_local:1,
194 added_by_external_learn:1,
197 /* write-heavy members should not affect lookups */
198 unsigned long updated ____cacheline_aligned_in_smp;
204 #define MDB_PG_FLAGS_PERMANENT BIT(0)
205 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
207 struct net_bridge_port_group {
208 struct net_bridge_port *port;
209 struct net_bridge_port_group __rcu *next;
210 struct hlist_node mglist;
212 struct timer_list timer;
215 unsigned char eth_addr[ETH_ALEN];
218 struct net_bridge_mdb_entry {
219 struct rhash_head rhnode;
220 struct net_bridge *br;
221 struct net_bridge_port_group __rcu *ports;
223 struct timer_list timer;
226 struct hlist_node mdb_node;
229 struct net_bridge_port {
230 struct net_bridge *br;
231 struct net_device *dev;
232 struct list_head list;
235 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
236 struct net_bridge_vlan_group __rcu *vlgrp;
238 struct net_bridge_port __rcu *backup_port;
244 unsigned char topology_change_ack;
245 unsigned char config_pending;
247 port_id designated_port;
248 bridge_id designated_root;
249 bridge_id designated_bridge;
252 unsigned long designated_age;
254 struct timer_list forward_delay_timer;
255 struct timer_list hold_timer;
256 struct timer_list message_age_timer;
260 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
261 struct bridge_mcast_own_query ip4_own_query;
262 #if IS_ENABLED(CONFIG_IPV6)
263 struct bridge_mcast_own_query ip6_own_query;
264 #endif /* IS_ENABLED(CONFIG_IPV6) */
265 unsigned char multicast_router;
266 struct bridge_mcast_stats __percpu *mcast_stats;
267 struct timer_list multicast_router_timer;
268 struct hlist_head mglist;
269 struct hlist_node rlist;
273 char sysfs_name[IFNAMSIZ];
276 #ifdef CONFIG_NET_POLL_CONTROLLER
279 #ifdef CONFIG_NET_SWITCHDEV
280 int offload_fwd_mark;
283 u16 backup_redirected_cnt;
286 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
288 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
289 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
291 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
293 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
295 return rcu_dereference(dev->rx_handler_data);
298 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
300 return br_port_exists(dev) ?
301 rtnl_dereference(dev->rx_handler_data) : NULL;
304 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
306 return br_port_exists(dev) ?
307 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
310 enum net_bridge_opts {
312 BROPT_VLAN_STATS_ENABLED,
313 BROPT_NF_CALL_IPTABLES,
314 BROPT_NF_CALL_IP6TABLES,
315 BROPT_NF_CALL_ARPTABLES,
316 BROPT_GROUP_ADDR_SET,
317 BROPT_MULTICAST_ENABLED,
318 BROPT_MULTICAST_QUERIER,
319 BROPT_MULTICAST_QUERY_USE_IFADDR,
320 BROPT_MULTICAST_STATS_ENABLED,
322 BROPT_NEIGH_SUPPRESS_ENABLED,
323 BROPT_MTU_SET_BY_USER,
324 BROPT_VLAN_STATS_PER_PORT,
330 spinlock_t hash_lock;
331 struct list_head port_list;
332 struct net_device *dev;
333 struct pcpu_sw_netstats __percpu *stats;
334 unsigned long options;
335 /* These fields are accessed on each packet */
336 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
339 struct net_bridge_vlan_group __rcu *vlgrp;
342 struct rhashtable fdb_hash_tbl;
343 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
345 struct rtable fake_rtable;
346 struct rt6_info fake_rt6_info;
350 u16 group_fwd_mask_required;
353 bridge_id designated_root;
355 unsigned char topology_change;
356 unsigned char topology_change_detected;
358 unsigned long max_age;
359 unsigned long hello_time;
360 unsigned long forward_delay;
361 unsigned long ageing_time;
362 unsigned long bridge_max_age;
363 unsigned long bridge_hello_time;
364 unsigned long bridge_forward_delay;
365 unsigned long bridge_ageing_time;
368 u8 group_addr[ETH_ALEN];
371 BR_NO_STP, /* no spanning tree */
372 BR_KERNEL_STP, /* old STP in kernel */
373 BR_USER_STP, /* new RSTP in userspace */
376 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
380 u32 multicast_last_member_count;
381 u32 multicast_startup_query_count;
383 u8 multicast_igmp_version;
385 #if IS_ENABLED(CONFIG_IPV6)
386 u8 multicast_mld_version;
388 spinlock_t multicast_lock;
389 unsigned long multicast_last_member_interval;
390 unsigned long multicast_membership_interval;
391 unsigned long multicast_querier_interval;
392 unsigned long multicast_query_interval;
393 unsigned long multicast_query_response_interval;
394 unsigned long multicast_startup_query_interval;
396 struct rhashtable mdb_hash_tbl;
398 struct hlist_head mdb_list;
399 struct hlist_head router_list;
401 struct timer_list multicast_router_timer;
402 struct bridge_mcast_other_query ip4_other_query;
403 struct bridge_mcast_own_query ip4_own_query;
404 struct bridge_mcast_querier ip4_querier;
405 struct bridge_mcast_stats __percpu *mcast_stats;
406 #if IS_ENABLED(CONFIG_IPV6)
407 struct bridge_mcast_other_query ip6_other_query;
408 struct bridge_mcast_own_query ip6_own_query;
409 struct bridge_mcast_querier ip6_querier;
410 #endif /* IS_ENABLED(CONFIG_IPV6) */
413 struct timer_list hello_timer;
414 struct timer_list tcn_timer;
415 struct timer_list topology_change_timer;
416 struct delayed_work gc_work;
417 struct kobject *ifobj;
420 #ifdef CONFIG_NET_SWITCHDEV
421 int offload_fwd_mark;
423 struct hlist_head fdb_list;
426 struct br_input_skb_cb {
427 struct net_device *brdev;
429 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
434 bool proxyarp_replied;
435 bool src_port_isolated;
437 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
441 #ifdef CONFIG_NET_SWITCHDEV
442 int offload_fwd_mark;
446 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
448 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
449 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
451 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
454 #define br_printk(level, br, format, args...) \
455 printk(level "%s: " format, (br)->dev->name, ##args)
457 #define br_err(__br, format, args...) \
458 br_printk(KERN_ERR, __br, format, ##args)
459 #define br_warn(__br, format, args...) \
460 br_printk(KERN_WARNING, __br, format, ##args)
461 #define br_notice(__br, format, args...) \
462 br_printk(KERN_NOTICE, __br, format, ##args)
463 #define br_info(__br, format, args...) \
464 br_printk(KERN_INFO, __br, format, ##args)
466 #define br_debug(br, format, args...) \
467 pr_debug("%s: " format, (br)->dev->name, ##args)
469 /* called under bridge lock */
470 static inline int br_is_root_bridge(const struct net_bridge *br)
472 return !memcmp(&br->bridge_id, &br->designated_root, 8);
475 /* check if a VLAN entry is global */
476 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
478 return v->flags & BRIDGE_VLAN_INFO_MASTER;
481 /* check if a VLAN entry is used by the bridge */
482 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
484 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
487 /* check if we should use the vlan entry, returns false if it's only context */
488 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
490 if (br_vlan_is_master(v)) {
491 if (br_vlan_is_brentry(v))
500 static inline int br_opt_get(const struct net_bridge *br,
501 enum net_bridge_opts opt)
503 return test_bit(opt, &br->options);
506 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
507 struct netlink_ext_ack *extack);
508 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
509 int br_boolopt_multi_toggle(struct net_bridge *br,
510 struct br_boolopt_multi *bm,
511 struct netlink_ext_ack *extack);
512 void br_boolopt_multi_get(const struct net_bridge *br,
513 struct br_boolopt_multi *bm);
514 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
517 void br_dev_setup(struct net_device *dev);
518 void br_dev_delete(struct net_device *dev, struct list_head *list);
519 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
520 #ifdef CONFIG_NET_POLL_CONTROLLER
521 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
524 struct netpoll *np = p->np;
527 netpoll_send_skb(np, skb);
530 int br_netpoll_enable(struct net_bridge_port *p);
531 void br_netpoll_disable(struct net_bridge_port *p);
533 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
538 static inline int br_netpoll_enable(struct net_bridge_port *p)
543 static inline void br_netpoll_disable(struct net_bridge_port *p)
549 int br_fdb_init(void);
550 void br_fdb_fini(void);
551 int br_fdb_hash_init(struct net_bridge *br);
552 void br_fdb_hash_fini(struct net_bridge *br);
553 void br_fdb_flush(struct net_bridge *br);
554 void br_fdb_find_delete_local(struct net_bridge *br,
555 const struct net_bridge_port *p,
556 const unsigned char *addr, u16 vid);
557 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
558 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
559 void br_fdb_cleanup(struct work_struct *work);
560 void br_fdb_delete_by_port(struct net_bridge *br,
561 const struct net_bridge_port *p, u16 vid, int do_all);
562 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
563 const unsigned char *addr,
565 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
566 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
568 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
569 const unsigned char *addr, u16 vid);
570 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
571 const unsigned char *addr, u16 vid, bool added_by_user);
573 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
574 struct net_device *dev, const unsigned char *addr, u16 vid);
575 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
576 const unsigned char *addr, u16 vid, u16 nlh_flags,
577 struct netlink_ext_ack *extack);
578 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
579 struct net_device *dev, struct net_device *fdev, int *idx);
580 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
581 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
582 struct netlink_ext_ack *extack);
583 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
584 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
585 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
586 const unsigned char *addr, u16 vid,
588 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
589 const unsigned char *addr, u16 vid,
591 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
592 const unsigned char *addr, u16 vid, bool offloaded);
600 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
601 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
602 bool local_rcv, bool local_orig);
603 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
604 void br_flood(struct net_bridge *br, struct sk_buff *skb,
605 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
607 /* return true if both source port and dest port are isolated */
608 static inline bool br_skb_isolated(const struct net_bridge_port *to,
609 const struct sk_buff *skb)
611 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
612 (to->flags & BR_ISOLATED);
616 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
617 int br_add_bridge(struct net *net, const char *name);
618 int br_del_bridge(struct net *net, const char *name);
619 int br_add_if(struct net_bridge *br, struct net_device *dev,
620 struct netlink_ext_ack *extack);
621 int br_del_if(struct net_bridge *br, struct net_device *dev);
622 void br_mtu_auto_adjust(struct net_bridge *br);
623 netdev_features_t br_features_recompute(struct net_bridge *br,
624 netdev_features_t features);
625 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
626 void br_manage_promisc(struct net_bridge *br);
627 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
630 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
631 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
633 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
635 return rcu_dereference(dev->rx_handler) == br_handle_frame;
638 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
640 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
643 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
645 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
648 static inline struct net_bridge_port *
649 br_port_get_check_rtnl(const struct net_device *dev)
651 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
655 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
656 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
660 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
661 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
662 struct sk_buff *skb, u16 vid);
663 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
664 struct sk_buff *skb, u16 vid);
665 int br_multicast_add_port(struct net_bridge_port *port);
666 void br_multicast_del_port(struct net_bridge_port *port);
667 void br_multicast_enable_port(struct net_bridge_port *port);
668 void br_multicast_disable_port(struct net_bridge_port *port);
669 void br_multicast_init(struct net_bridge *br);
670 void br_multicast_open(struct net_bridge *br);
671 void br_multicast_stop(struct net_bridge *br);
672 void br_multicast_dev_del(struct net_bridge *br);
673 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
674 struct sk_buff *skb, bool local_rcv, bool local_orig);
675 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
676 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
677 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
678 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
679 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
680 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
681 #if IS_ENABLED(CONFIG_IPV6)
682 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
684 struct net_bridge_mdb_entry *
685 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
686 struct net_bridge_mdb_entry *
687 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
688 struct net_bridge_port_group *
689 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
690 struct net_bridge_port_group __rcu *next,
691 unsigned char flags, const unsigned char *src);
692 int br_mdb_hash_init(struct net_bridge *br);
693 void br_mdb_hash_fini(struct net_bridge *br);
694 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
695 struct br_ip *group, int type, u8 flags);
696 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
698 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
699 const struct sk_buff *skb, u8 type, u8 dir);
700 int br_multicast_init_stats(struct net_bridge *br);
701 void br_multicast_uninit_stats(struct net_bridge *br);
702 void br_multicast_get_stats(const struct net_bridge *br,
703 const struct net_bridge_port *p,
704 struct br_mcast_stats *dest);
705 void br_mdb_init(void);
706 void br_mdb_uninit(void);
708 #define mlock_dereference(X, br) \
709 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
711 static inline bool br_multicast_is_router(struct net_bridge *br)
713 return br->multicast_router == 2 ||
714 (br->multicast_router == 1 &&
715 timer_pending(&br->multicast_router_timer));
719 __br_multicast_querier_exists(struct net_bridge *br,
720 struct bridge_mcast_other_query *querier,
723 bool own_querier_enabled;
725 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
726 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
727 own_querier_enabled = false;
729 own_querier_enabled = true;
731 own_querier_enabled = false;
734 return time_is_before_jiffies(querier->delay_time) &&
735 (own_querier_enabled || timer_pending(&querier->timer));
738 static inline bool br_multicast_querier_exists(struct net_bridge *br,
741 switch (eth->h_proto) {
742 case (htons(ETH_P_IP)):
743 return __br_multicast_querier_exists(br,
744 &br->ip4_other_query, false);
745 #if IS_ENABLED(CONFIG_IPV6)
746 case (htons(ETH_P_IPV6)):
747 return __br_multicast_querier_exists(br,
748 &br->ip6_other_query, true);
755 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
757 return BR_INPUT_SKB_CB(skb)->igmp;
760 static inline int br_multicast_rcv(struct net_bridge *br,
761 struct net_bridge_port *port,
768 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
769 struct sk_buff *skb, u16 vid)
774 static inline int br_multicast_add_port(struct net_bridge_port *port)
779 static inline void br_multicast_del_port(struct net_bridge_port *port)
783 static inline void br_multicast_enable_port(struct net_bridge_port *port)
787 static inline void br_multicast_disable_port(struct net_bridge_port *port)
791 static inline void br_multicast_init(struct net_bridge *br)
795 static inline void br_multicast_open(struct net_bridge *br)
799 static inline void br_multicast_stop(struct net_bridge *br)
803 static inline void br_multicast_dev_del(struct net_bridge *br)
807 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
809 bool local_rcv, bool local_orig)
813 static inline bool br_multicast_is_router(struct net_bridge *br)
818 static inline bool br_multicast_querier_exists(struct net_bridge *br,
824 static inline void br_mdb_init(void)
828 static inline void br_mdb_uninit(void)
832 static inline int br_mdb_hash_init(struct net_bridge *br)
837 static inline void br_mdb_hash_fini(struct net_bridge *br)
841 static inline void br_multicast_count(struct net_bridge *br,
842 const struct net_bridge_port *p,
843 const struct sk_buff *skb,
848 static inline int br_multicast_init_stats(struct net_bridge *br)
853 static inline void br_multicast_uninit_stats(struct net_bridge *br)
857 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
864 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
865 bool br_allowed_ingress(const struct net_bridge *br,
866 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
868 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
869 const struct sk_buff *skb);
870 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
871 struct sk_buff *br_handle_vlan(struct net_bridge *br,
872 const struct net_bridge_port *port,
873 struct net_bridge_vlan_group *vg,
874 struct sk_buff *skb);
875 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
876 bool *changed, struct netlink_ext_ack *extack);
877 int br_vlan_delete(struct net_bridge *br, u16 vid);
878 void br_vlan_flush(struct net_bridge *br);
879 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
880 void br_recalculate_fwd_mask(struct net_bridge *br);
881 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
882 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
883 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
884 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
885 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
886 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
887 int br_vlan_init(struct net_bridge *br);
888 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
889 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
890 struct netlink_ext_ack *extack);
891 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
892 bool *changed, struct netlink_ext_ack *extack);
893 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
894 void nbp_vlan_flush(struct net_bridge_port *port);
895 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
896 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
897 void br_vlan_get_stats(const struct net_bridge_vlan *v,
898 struct br_vlan_stats *stats);
900 static inline struct net_bridge_vlan_group *br_vlan_group(
901 const struct net_bridge *br)
903 return rtnl_dereference(br->vlgrp);
906 static inline struct net_bridge_vlan_group *nbp_vlan_group(
907 const struct net_bridge_port *p)
909 return rtnl_dereference(p->vlgrp);
912 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
913 const struct net_bridge *br)
915 return rcu_dereference(br->vlgrp);
918 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
919 const struct net_bridge_port *p)
921 return rcu_dereference(p->vlgrp);
924 /* Since bridge now depends on 8021Q module, but the time bridge sees the
925 * skb, the vlan tag will always be present if the frame was tagged.
927 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
931 if (skb_vlan_tag_present(skb)) {
932 *vid = skb_vlan_tag_get_id(skb);
941 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
951 static inline bool br_allowed_ingress(const struct net_bridge *br,
952 struct net_bridge_vlan_group *vg,
959 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
960 const struct sk_buff *skb)
965 static inline bool br_should_learn(struct net_bridge_port *p,
966 struct sk_buff *skb, u16 *vid)
971 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
972 const struct net_bridge_port *port,
973 struct net_bridge_vlan_group *vg,
979 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
980 bool *changed, struct netlink_ext_ack *extack)
986 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
991 static inline void br_vlan_flush(struct net_bridge *br)
995 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
999 static inline int br_vlan_init(struct net_bridge *br)
1004 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1005 bool *changed, struct netlink_ext_ack *extack)
1011 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1016 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1020 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1026 static inline int nbp_vlan_init(struct net_bridge_port *port,
1027 struct netlink_ext_ack *extack)
1032 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1037 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1042 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1048 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1054 static inline struct net_bridge_vlan_group *br_vlan_group(
1055 const struct net_bridge *br)
1060 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1061 const struct net_bridge_port *p)
1066 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1067 const struct net_bridge *br)
1072 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1073 const struct net_bridge_port *p)
1078 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1079 struct br_vlan_stats *stats)
1085 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1087 extern const struct nf_br_ops __rcu *nf_br_ops;
1089 /* br_netfilter.c */
1090 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1091 int br_nf_core_init(void);
1092 void br_nf_core_fini(void);
1093 void br_netfilter_rtable_init(struct net_bridge *);
1095 static inline int br_nf_core_init(void) { return 0; }
1096 static inline void br_nf_core_fini(void) {}
1097 #define br_netfilter_rtable_init(x)
1101 void br_set_state(struct net_bridge_port *p, unsigned int state);
1102 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1103 void br_init_port(struct net_bridge_port *p);
1104 void br_become_designated_port(struct net_bridge_port *p);
1106 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1107 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1108 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1109 int br_set_max_age(struct net_bridge *br, unsigned long x);
1110 int __set_ageing_time(struct net_device *dev, unsigned long t);
1111 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1115 void br_stp_enable_bridge(struct net_bridge *br);
1116 void br_stp_disable_bridge(struct net_bridge *br);
1117 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1118 void br_stp_enable_port(struct net_bridge_port *p);
1119 void br_stp_disable_port(struct net_bridge_port *p);
1120 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1121 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1122 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1123 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1124 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1125 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1129 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1130 struct net_device *dev);
1132 /* br_stp_timer.c */
1133 void br_stp_timer_init(struct net_bridge *br);
1134 void br_stp_port_timer_init(struct net_bridge_port *p);
1135 unsigned long br_timer_value(const struct timer_list *timer);
1138 #if IS_ENABLED(CONFIG_ATM_LANE)
1139 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1143 extern struct rtnl_link_ops br_link_ops;
1144 int br_netlink_init(void);
1145 void br_netlink_fini(void);
1146 void br_ifinfo_notify(int event, const struct net_bridge *br,
1147 const struct net_bridge_port *port);
1148 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1149 struct netlink_ext_ack *extack);
1150 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1151 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1152 u32 filter_mask, int nlflags);
1156 extern const struct sysfs_ops brport_sysfs_ops;
1157 int br_sysfs_addif(struct net_bridge_port *p);
1158 int br_sysfs_renameif(struct net_bridge_port *p);
1161 int br_sysfs_addbr(struct net_device *dev);
1162 void br_sysfs_delbr(struct net_device *dev);
1166 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1167 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1168 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1169 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1170 #endif /* CONFIG_SYSFS */
1172 /* br_switchdev.c */
1173 #ifdef CONFIG_NET_SWITCHDEV
1174 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1175 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1176 struct sk_buff *skb);
1177 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1178 const struct sk_buff *skb);
1179 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1180 unsigned long flags,
1181 unsigned long mask);
1182 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1184 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1185 struct netlink_ext_ack *extack);
1186 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1188 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1190 skb->offload_fwd_mark = 0;
1193 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1198 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1199 struct sk_buff *skb)
1203 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1204 const struct sk_buff *skb)
1209 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1210 unsigned long flags,
1216 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1218 struct netlink_ext_ack *extack)
1223 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1229 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1233 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1236 #endif /* CONFIG_NET_SWITCHDEV */
1238 /* br_arp_nd_proxy.c */
1239 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1240 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1241 u16 vid, struct net_bridge_port *p);
1242 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1243 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1244 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);