1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * Linux ethernet bridge
6 * Lennert Buytenhek <buytenh@gnu.org>
12 #include <linux/netdevice.h>
13 #include <linux/if_bridge.h>
14 #include <linux/netpoll.h>
15 #include <linux/u64_stats_sync.h>
16 #include <net/route.h>
17 #include <net/ip6_fib.h>
18 #include <linux/if_vlan.h>
19 #include <linux/rhashtable.h>
20 #include <linux/refcount.h>
22 #define BR_HASH_BITS 8
23 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
25 #define BR_HOLD_TIME (1*HZ)
27 #define BR_PORT_BITS 10
28 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
30 #define BR_MULTICAST_DEFAULT_HASH_MAX 4096
32 #define BR_VERSION "2.3"
34 /* Control of forwarding link local multicast */
35 #define BR_GROUPFWD_DEFAULT 0
36 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
38 BR_GROUPFWD_STP = BIT(0),
39 BR_GROUPFWD_MACPAUSE = BIT(1),
40 BR_GROUPFWD_LACP = BIT(2),
43 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
45 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
46 #define BR_GROUPFWD_8021AD 0xB801u
48 /* Path to usermode spanning tree program */
49 #define BR_STP_PROG "/sbin/bridge-stp"
51 typedef struct bridge_id bridge_id;
52 typedef struct mac_addr mac_addr;
53 typedef __u16 port_id;
56 unsigned char prio[2];
57 unsigned char addr[ETH_ALEN];
61 unsigned char addr[ETH_ALEN];
64 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
66 struct bridge_mcast_own_query {
67 struct timer_list timer;
72 struct bridge_mcast_other_query {
73 struct timer_list timer;
74 unsigned long delay_time;
77 /* selected querier */
78 struct bridge_mcast_querier {
80 struct net_bridge_port __rcu *port;
83 /* IGMP/MLD statistics */
84 struct bridge_mcast_stats {
85 struct br_mcast_stats mstats;
86 struct u64_stats_sync syncp;
90 struct br_vlan_stats {
95 struct u64_stats_sync syncp;
98 struct br_tunnel_info {
100 struct metadata_dst *tunnel_dst;
103 /* private vlan flags */
105 BR_VLFLAG_PER_PORT_STATS = BIT(0),
106 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
110 * struct net_bridge_vlan - per-vlan entry
112 * @vnode: rhashtable member
114 * @flags: bridge vlan flags
115 * @priv_flags: private (in-kernel) bridge vlan flags
116 * @stats: per-cpu VLAN statistics
117 * @br: if MASTER flag set, this points to a bridge struct
118 * @port: if MASTER flag unset, this points to a port struct
119 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
120 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
121 * for this VLAN entry
122 * @vlist: sorted list of VLAN entries
123 * @rcu: used for entry destruction
125 * This structure is shared between the global per-VLAN entries contained in
126 * the bridge rhashtable and the local per-port per-VLAN entries contained in
127 * the port's rhashtable. The union entries should be interpreted depending on
128 * the entry flags that are set.
130 struct net_bridge_vlan {
131 struct rhash_head vnode;
132 struct rhash_head tnode;
136 struct br_vlan_stats __percpu *stats;
138 struct net_bridge *br;
139 struct net_bridge_port *port;
143 struct net_bridge_vlan *brvlan;
146 struct br_tunnel_info tinfo;
148 struct list_head vlist;
154 * struct net_bridge_vlan_group
156 * @vlan_hash: VLAN entry rhashtable
157 * @vlan_list: sorted VLAN entry list
158 * @num_vlans: number of total VLAN entries
159 * @pvid: PVID VLAN id
161 * IMPORTANT: Be careful when checking if there're VLAN entries using list
162 * primitives because the bridge can have entries in its list which
163 * are just for global context but not for filtering, i.e. they have
164 * the master flag set but not the brentry flag. If you have to check
165 * if there're "real" entries in the bridge please test @num_vlans
167 struct net_bridge_vlan_group {
168 struct rhashtable vlan_hash;
169 struct rhashtable tunnel_hash;
170 struct list_head vlan_list;
175 struct net_bridge_fdb_key {
180 struct net_bridge_fdb_entry {
181 struct rhash_head rhnode;
182 struct net_bridge_port *dst;
184 struct net_bridge_fdb_key key;
185 struct hlist_node fdb_node;
186 unsigned char is_local:1,
190 added_by_external_learn:1,
193 /* write-heavy members should not affect lookups */
194 unsigned long updated ____cacheline_aligned_in_smp;
200 #define MDB_PG_FLAGS_PERMANENT BIT(0)
201 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
203 struct net_bridge_port_group {
204 struct net_bridge_port *port;
205 struct net_bridge_port_group __rcu *next;
206 struct hlist_node mglist;
208 struct timer_list timer;
211 unsigned char eth_addr[ETH_ALEN];
214 struct net_bridge_mdb_entry {
215 struct rhash_head rhnode;
216 struct net_bridge *br;
217 struct net_bridge_port_group __rcu *ports;
219 struct timer_list timer;
222 struct hlist_node mdb_node;
225 struct net_bridge_port {
226 struct net_bridge *br;
227 struct net_device *dev;
228 struct list_head list;
231 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
232 struct net_bridge_vlan_group __rcu *vlgrp;
234 struct net_bridge_port __rcu *backup_port;
240 unsigned char topology_change_ack;
241 unsigned char config_pending;
243 port_id designated_port;
244 bridge_id designated_root;
245 bridge_id designated_bridge;
248 unsigned long designated_age;
250 struct timer_list forward_delay_timer;
251 struct timer_list hold_timer;
252 struct timer_list message_age_timer;
256 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
257 struct bridge_mcast_own_query ip4_own_query;
258 #if IS_ENABLED(CONFIG_IPV6)
259 struct bridge_mcast_own_query ip6_own_query;
260 #endif /* IS_ENABLED(CONFIG_IPV6) */
261 unsigned char multicast_router;
262 struct bridge_mcast_stats __percpu *mcast_stats;
263 struct timer_list multicast_router_timer;
264 struct hlist_head mglist;
265 struct hlist_node rlist;
269 char sysfs_name[IFNAMSIZ];
272 #ifdef CONFIG_NET_POLL_CONTROLLER
275 #ifdef CONFIG_NET_SWITCHDEV
276 int offload_fwd_mark;
279 u16 backup_redirected_cnt;
282 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
284 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
285 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
287 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
289 return rcu_dereference(dev->rx_handler_data);
292 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
294 return netif_is_bridge_port(dev) ?
295 rtnl_dereference(dev->rx_handler_data) : NULL;
298 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
300 return netif_is_bridge_port(dev) ?
301 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
304 enum net_bridge_opts {
306 BROPT_VLAN_STATS_ENABLED,
307 BROPT_NF_CALL_IPTABLES,
308 BROPT_NF_CALL_IP6TABLES,
309 BROPT_NF_CALL_ARPTABLES,
310 BROPT_GROUP_ADDR_SET,
311 BROPT_MULTICAST_ENABLED,
312 BROPT_MULTICAST_QUERIER,
313 BROPT_MULTICAST_QUERY_USE_IFADDR,
314 BROPT_MULTICAST_STATS_ENABLED,
316 BROPT_NEIGH_SUPPRESS_ENABLED,
317 BROPT_MTU_SET_BY_USER,
318 BROPT_VLAN_STATS_PER_PORT,
320 BROPT_VLAN_BRIDGE_BINDING,
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 /* These fields are accessed on each packet */
331 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
334 struct net_bridge_vlan_group __rcu *vlgrp;
337 struct rhashtable fdb_hash_tbl;
338 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
340 struct rtable fake_rtable;
341 struct rt6_info fake_rt6_info;
345 u16 group_fwd_mask_required;
348 bridge_id designated_root;
350 unsigned char topology_change;
351 unsigned char topology_change_detected;
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;
363 u8 group_addr[ETH_ALEN];
366 BR_NO_STP, /* no spanning tree */
367 BR_KERNEL_STP, /* old STP in kernel */
368 BR_USER_STP, /* new RSTP in userspace */
371 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
375 u32 multicast_last_member_count;
376 u32 multicast_startup_query_count;
378 u8 multicast_igmp_version;
380 #if IS_ENABLED(CONFIG_IPV6)
381 u8 multicast_mld_version;
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;
391 struct rhashtable mdb_hash_tbl;
393 struct hlist_head mdb_list;
394 struct hlist_head router_list;
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 /* IS_ENABLED(CONFIG_IPV6) */
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;
415 #ifdef CONFIG_NET_SWITCHDEV
416 int offload_fwd_mark;
418 struct hlist_head fdb_list;
421 struct br_input_skb_cb {
422 struct net_device *brdev;
425 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
429 u8 proxyarp_replied:1;
430 u8 src_port_isolated:1;
431 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
434 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
435 u8 br_netfilter_broute:1;
438 #ifdef CONFIG_NET_SWITCHDEV
439 int offload_fwd_mark;
443 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
445 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
446 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
448 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
451 #define br_printk(level, br, format, args...) \
452 printk(level "%s: " format, (br)->dev->name, ##args)
454 #define br_err(__br, format, args...) \
455 br_printk(KERN_ERR, __br, format, ##args)
456 #define br_warn(__br, format, args...) \
457 br_printk(KERN_WARNING, __br, format, ##args)
458 #define br_notice(__br, format, args...) \
459 br_printk(KERN_NOTICE, __br, format, ##args)
460 #define br_info(__br, format, args...) \
461 br_printk(KERN_INFO, __br, format, ##args)
463 #define br_debug(br, format, args...) \
464 pr_debug("%s: " format, (br)->dev->name, ##args)
466 /* called under bridge lock */
467 static inline int br_is_root_bridge(const struct net_bridge *br)
469 return !memcmp(&br->bridge_id, &br->designated_root, 8);
472 /* check if a VLAN entry is global */
473 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
475 return v->flags & BRIDGE_VLAN_INFO_MASTER;
478 /* check if a VLAN entry is used by the bridge */
479 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
481 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
484 /* check if we should use the vlan entry, returns false if it's only context */
485 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
487 if (br_vlan_is_master(v)) {
488 if (br_vlan_is_brentry(v))
497 static inline int br_opt_get(const struct net_bridge *br,
498 enum net_bridge_opts opt)
500 return test_bit(opt, &br->options);
503 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
504 struct netlink_ext_ack *extack);
505 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
506 int br_boolopt_multi_toggle(struct net_bridge *br,
507 struct br_boolopt_multi *bm,
508 struct netlink_ext_ack *extack);
509 void br_boolopt_multi_get(const struct net_bridge *br,
510 struct br_boolopt_multi *bm);
511 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
514 void br_dev_setup(struct net_device *dev);
515 void br_dev_delete(struct net_device *dev, struct list_head *list);
516 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
517 #ifdef CONFIG_NET_POLL_CONTROLLER
518 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
521 struct netpoll *np = p->np;
524 netpoll_send_skb(np, skb);
527 int br_netpoll_enable(struct net_bridge_port *p);
528 void br_netpoll_disable(struct net_bridge_port *p);
530 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
535 static inline int br_netpoll_enable(struct net_bridge_port *p)
540 static inline void br_netpoll_disable(struct net_bridge_port *p)
546 int br_fdb_init(void);
547 void br_fdb_fini(void);
548 int br_fdb_hash_init(struct net_bridge *br);
549 void br_fdb_hash_fini(struct net_bridge *br);
550 void br_fdb_flush(struct net_bridge *br);
551 void br_fdb_find_delete_local(struct net_bridge *br,
552 const struct net_bridge_port *p,
553 const unsigned char *addr, u16 vid);
554 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
555 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
556 void br_fdb_cleanup(struct work_struct *work);
557 void br_fdb_delete_by_port(struct net_bridge *br,
558 const struct net_bridge_port *p, u16 vid, int do_all);
559 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
560 const unsigned char *addr,
562 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
563 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
565 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
566 const unsigned char *addr, u16 vid);
567 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
568 const unsigned char *addr, u16 vid, bool added_by_user);
570 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
571 struct net_device *dev, const unsigned char *addr, u16 vid);
572 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
573 const unsigned char *addr, u16 vid, u16 nlh_flags,
574 struct netlink_ext_ack *extack);
575 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
576 struct net_device *dev, struct net_device *fdev, int *idx);
577 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
578 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
579 struct netlink_ext_ack *extack);
580 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
581 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
582 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
583 const unsigned char *addr, u16 vid,
585 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
586 const unsigned char *addr, u16 vid,
588 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
589 const unsigned char *addr, u16 vid, bool offloaded);
597 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
598 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
599 bool local_rcv, bool local_orig);
600 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
601 void br_flood(struct net_bridge *br, struct sk_buff *skb,
602 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
604 /* return true if both source port and dest port are isolated */
605 static inline bool br_skb_isolated(const struct net_bridge_port *to,
606 const struct sk_buff *skb)
608 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
609 (to->flags & BR_ISOLATED);
613 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
614 int br_add_bridge(struct net *net, const char *name);
615 int br_del_bridge(struct net *net, const char *name);
616 int br_add_if(struct net_bridge *br, struct net_device *dev,
617 struct netlink_ext_ack *extack);
618 int br_del_if(struct net_bridge *br, struct net_device *dev);
619 void br_mtu_auto_adjust(struct net_bridge *br);
620 netdev_features_t br_features_recompute(struct net_bridge *br,
621 netdev_features_t features);
622 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
623 void br_manage_promisc(struct net_bridge *br);
624 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
627 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
628 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
630 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
632 return rcu_dereference(dev->rx_handler) == br_handle_frame;
635 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
637 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
640 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
642 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
645 static inline struct net_bridge_port *
646 br_port_get_check_rtnl(const struct net_device *dev)
648 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
652 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
653 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
657 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
658 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
659 struct sk_buff *skb, u16 vid);
660 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
661 struct sk_buff *skb, u16 vid);
662 int br_multicast_add_port(struct net_bridge_port *port);
663 void br_multicast_del_port(struct net_bridge_port *port);
664 void br_multicast_enable_port(struct net_bridge_port *port);
665 void br_multicast_disable_port(struct net_bridge_port *port);
666 void br_multicast_init(struct net_bridge *br);
667 void br_multicast_open(struct net_bridge *br);
668 void br_multicast_stop(struct net_bridge *br);
669 void br_multicast_dev_del(struct net_bridge *br);
670 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
671 struct sk_buff *skb, bool local_rcv, bool local_orig);
672 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
673 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
674 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
675 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
676 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
677 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
678 #if IS_ENABLED(CONFIG_IPV6)
679 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
681 struct net_bridge_mdb_entry *
682 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
683 struct net_bridge_mdb_entry *
684 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
685 struct net_bridge_port_group *
686 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
687 struct net_bridge_port_group __rcu *next,
688 unsigned char flags, const unsigned char *src);
689 int br_mdb_hash_init(struct net_bridge *br);
690 void br_mdb_hash_fini(struct net_bridge *br);
691 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
692 struct br_ip *group, int type, u8 flags);
693 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
695 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
696 const struct sk_buff *skb, u8 type, u8 dir);
697 int br_multicast_init_stats(struct net_bridge *br);
698 void br_multicast_uninit_stats(struct net_bridge *br);
699 void br_multicast_get_stats(const struct net_bridge *br,
700 const struct net_bridge_port *p,
701 struct br_mcast_stats *dest);
702 void br_mdb_init(void);
703 void br_mdb_uninit(void);
705 #define mlock_dereference(X, br) \
706 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
708 static inline bool br_multicast_is_router(struct net_bridge *br)
710 return br->multicast_router == 2 ||
711 (br->multicast_router == 1 &&
712 timer_pending(&br->multicast_router_timer));
716 __br_multicast_querier_exists(struct net_bridge *br,
717 struct bridge_mcast_other_query *querier,
720 bool own_querier_enabled;
722 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
723 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
724 own_querier_enabled = false;
726 own_querier_enabled = true;
728 own_querier_enabled = false;
731 return time_is_before_jiffies(querier->delay_time) &&
732 (own_querier_enabled || timer_pending(&querier->timer));
735 static inline bool br_multicast_querier_exists(struct net_bridge *br,
738 switch (eth->h_proto) {
739 case (htons(ETH_P_IP)):
740 return __br_multicast_querier_exists(br,
741 &br->ip4_other_query, false);
742 #if IS_ENABLED(CONFIG_IPV6)
743 case (htons(ETH_P_IPV6)):
744 return __br_multicast_querier_exists(br,
745 &br->ip6_other_query, true);
752 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
754 return BR_INPUT_SKB_CB(skb)->igmp;
757 static inline int br_multicast_rcv(struct net_bridge *br,
758 struct net_bridge_port *port,
765 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
766 struct sk_buff *skb, u16 vid)
771 static inline int br_multicast_add_port(struct net_bridge_port *port)
776 static inline void br_multicast_del_port(struct net_bridge_port *port)
780 static inline void br_multicast_enable_port(struct net_bridge_port *port)
784 static inline void br_multicast_disable_port(struct net_bridge_port *port)
788 static inline void br_multicast_init(struct net_bridge *br)
792 static inline void br_multicast_open(struct net_bridge *br)
796 static inline void br_multicast_stop(struct net_bridge *br)
800 static inline void br_multicast_dev_del(struct net_bridge *br)
804 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
806 bool local_rcv, bool local_orig)
810 static inline bool br_multicast_is_router(struct net_bridge *br)
815 static inline bool br_multicast_querier_exists(struct net_bridge *br,
821 static inline void br_mdb_init(void)
825 static inline void br_mdb_uninit(void)
829 static inline int br_mdb_hash_init(struct net_bridge *br)
834 static inline void br_mdb_hash_fini(struct net_bridge *br)
838 static inline void br_multicast_count(struct net_bridge *br,
839 const struct net_bridge_port *p,
840 const struct sk_buff *skb,
845 static inline int br_multicast_init_stats(struct net_bridge *br)
850 static inline void br_multicast_uninit_stats(struct net_bridge *br)
854 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
861 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
862 bool br_allowed_ingress(const struct net_bridge *br,
863 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
865 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
866 const struct sk_buff *skb);
867 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
868 struct sk_buff *br_handle_vlan(struct net_bridge *br,
869 const struct net_bridge_port *port,
870 struct net_bridge_vlan_group *vg,
871 struct sk_buff *skb);
872 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
873 bool *changed, struct netlink_ext_ack *extack);
874 int br_vlan_delete(struct net_bridge *br, u16 vid);
875 void br_vlan_flush(struct net_bridge *br);
876 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
877 void br_recalculate_fwd_mask(struct net_bridge *br);
878 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
879 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
880 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
881 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
882 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
883 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
884 int br_vlan_init(struct net_bridge *br);
885 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
886 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
887 struct netlink_ext_ack *extack);
888 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
889 bool *changed, struct netlink_ext_ack *extack);
890 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
891 void nbp_vlan_flush(struct net_bridge_port *port);
892 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
893 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
894 void br_vlan_get_stats(const struct net_bridge_vlan *v,
895 struct br_vlan_stats *stats);
896 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
897 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
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)
1083 static inline void br_vlan_port_event(struct net_bridge_port *p,
1084 unsigned long event)
1088 static inline int br_vlan_bridge_event(struct net_device *dev,
1089 unsigned long event, void *ptr)
1096 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1098 extern const struct nf_br_ops __rcu *nf_br_ops;
1100 /* br_netfilter.c */
1101 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1102 int br_nf_core_init(void);
1103 void br_nf_core_fini(void);
1104 void br_netfilter_rtable_init(struct net_bridge *);
1106 static inline int br_nf_core_init(void) { return 0; }
1107 static inline void br_nf_core_fini(void) {}
1108 #define br_netfilter_rtable_init(x)
1112 void br_set_state(struct net_bridge_port *p, unsigned int state);
1113 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1114 void br_init_port(struct net_bridge_port *p);
1115 void br_become_designated_port(struct net_bridge_port *p);
1117 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1118 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1119 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1120 int br_set_max_age(struct net_bridge *br, unsigned long x);
1121 int __set_ageing_time(struct net_device *dev, unsigned long t);
1122 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1126 void br_stp_enable_bridge(struct net_bridge *br);
1127 void br_stp_disable_bridge(struct net_bridge *br);
1128 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1129 void br_stp_enable_port(struct net_bridge_port *p);
1130 void br_stp_disable_port(struct net_bridge_port *p);
1131 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1132 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1133 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1134 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1135 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1136 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1140 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1141 struct net_device *dev);
1143 /* br_stp_timer.c */
1144 void br_stp_timer_init(struct net_bridge *br);
1145 void br_stp_port_timer_init(struct net_bridge_port *p);
1146 unsigned long br_timer_value(const struct timer_list *timer);
1149 #if IS_ENABLED(CONFIG_ATM_LANE)
1150 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1154 extern struct rtnl_link_ops br_link_ops;
1155 int br_netlink_init(void);
1156 void br_netlink_fini(void);
1157 void br_ifinfo_notify(int event, const struct net_bridge *br,
1158 const struct net_bridge_port *port);
1159 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1160 struct netlink_ext_ack *extack);
1161 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1162 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1163 u32 filter_mask, int nlflags);
1167 extern const struct sysfs_ops brport_sysfs_ops;
1168 int br_sysfs_addif(struct net_bridge_port *p);
1169 int br_sysfs_renameif(struct net_bridge_port *p);
1172 int br_sysfs_addbr(struct net_device *dev);
1173 void br_sysfs_delbr(struct net_device *dev);
1177 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1178 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1179 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1180 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1181 #endif /* CONFIG_SYSFS */
1183 /* br_switchdev.c */
1184 #ifdef CONFIG_NET_SWITCHDEV
1185 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1186 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1187 struct sk_buff *skb);
1188 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1189 const struct sk_buff *skb);
1190 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1191 unsigned long flags,
1192 unsigned long mask);
1193 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1195 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1196 struct netlink_ext_ack *extack);
1197 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1199 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1201 skb->offload_fwd_mark = 0;
1204 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1209 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1210 struct sk_buff *skb)
1214 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1215 const struct sk_buff *skb)
1220 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1221 unsigned long flags,
1227 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1229 struct netlink_ext_ack *extack)
1234 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1240 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1244 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1247 #endif /* CONFIG_NET_SWITCHDEV */
1249 /* br_arp_nd_proxy.c */
1250 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1251 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1252 u16 vid, struct net_bridge_port *p);
1253 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1254 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1255 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);