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 /* bridge fdb flags */
181 struct net_bridge_fdb_key {
186 struct net_bridge_fdb_entry {
187 struct rhash_head rhnode;
188 struct net_bridge_port *dst;
190 struct net_bridge_fdb_key key;
191 struct hlist_node fdb_node;
193 unsigned char is_sticky:1,
195 added_by_external_learn:1,
198 /* write-heavy members should not affect lookups */
199 unsigned long updated ____cacheline_aligned_in_smp;
205 #define MDB_PG_FLAGS_PERMANENT BIT(0)
206 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
207 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
209 struct net_bridge_port_group {
210 struct net_bridge_port *port;
211 struct net_bridge_port_group __rcu *next;
212 struct hlist_node mglist;
214 struct timer_list timer;
217 unsigned char eth_addr[ETH_ALEN];
220 struct net_bridge_mdb_entry {
221 struct rhash_head rhnode;
222 struct net_bridge *br;
223 struct net_bridge_port_group __rcu *ports;
225 struct timer_list timer;
228 struct hlist_node mdb_node;
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;
240 struct net_bridge_port __rcu *backup_port;
246 unsigned char topology_change_ack;
247 unsigned char config_pending;
249 port_id designated_port;
250 bridge_id designated_root;
251 bridge_id designated_bridge;
254 unsigned long designated_age;
256 struct timer_list forward_delay_timer;
257 struct timer_list hold_timer;
258 struct timer_list message_age_timer;
262 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
263 struct bridge_mcast_own_query ip4_own_query;
264 #if IS_ENABLED(CONFIG_IPV6)
265 struct bridge_mcast_own_query ip6_own_query;
266 #endif /* IS_ENABLED(CONFIG_IPV6) */
267 unsigned char multicast_router;
268 struct bridge_mcast_stats __percpu *mcast_stats;
269 struct timer_list multicast_router_timer;
270 struct hlist_head mglist;
271 struct hlist_node rlist;
275 char sysfs_name[IFNAMSIZ];
278 #ifdef CONFIG_NET_POLL_CONTROLLER
281 #ifdef CONFIG_NET_SWITCHDEV
282 int offload_fwd_mark;
285 u16 backup_redirected_cnt;
288 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
290 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
291 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
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 netif_is_bridge_port(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 netif_is_bridge_port(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,
326 BROPT_VLAN_BRIDGE_BINDING,
331 spinlock_t hash_lock;
332 struct list_head port_list;
333 struct net_device *dev;
334 struct pcpu_sw_netstats __percpu *stats;
335 unsigned long options;
336 /* These fields are accessed on each packet */
337 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
340 struct net_bridge_vlan_group __rcu *vlgrp;
343 struct rhashtable fdb_hash_tbl;
344 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
346 struct rtable fake_rtable;
347 struct rt6_info fake_rt6_info;
351 u16 group_fwd_mask_required;
354 bridge_id designated_root;
356 unsigned char topology_change;
357 unsigned char topology_change_detected;
359 unsigned long max_age;
360 unsigned long hello_time;
361 unsigned long forward_delay;
362 unsigned long ageing_time;
363 unsigned long bridge_max_age;
364 unsigned long bridge_hello_time;
365 unsigned long bridge_forward_delay;
366 unsigned long bridge_ageing_time;
369 u8 group_addr[ETH_ALEN];
372 BR_NO_STP, /* no spanning tree */
373 BR_KERNEL_STP, /* old STP in kernel */
374 BR_USER_STP, /* new RSTP in userspace */
377 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
381 u32 multicast_last_member_count;
382 u32 multicast_startup_query_count;
384 u8 multicast_igmp_version;
386 #if IS_ENABLED(CONFIG_IPV6)
387 u8 multicast_mld_version;
389 spinlock_t multicast_lock;
390 unsigned long multicast_last_member_interval;
391 unsigned long multicast_membership_interval;
392 unsigned long multicast_querier_interval;
393 unsigned long multicast_query_interval;
394 unsigned long multicast_query_response_interval;
395 unsigned long multicast_startup_query_interval;
397 struct rhashtable mdb_hash_tbl;
399 struct hlist_head mdb_list;
400 struct hlist_head router_list;
402 struct timer_list multicast_router_timer;
403 struct bridge_mcast_other_query ip4_other_query;
404 struct bridge_mcast_own_query ip4_own_query;
405 struct bridge_mcast_querier ip4_querier;
406 struct bridge_mcast_stats __percpu *mcast_stats;
407 #if IS_ENABLED(CONFIG_IPV6)
408 struct bridge_mcast_other_query ip6_other_query;
409 struct bridge_mcast_own_query ip6_own_query;
410 struct bridge_mcast_querier ip6_querier;
411 #endif /* IS_ENABLED(CONFIG_IPV6) */
414 struct timer_list hello_timer;
415 struct timer_list tcn_timer;
416 struct timer_list topology_change_timer;
417 struct delayed_work gc_work;
418 struct kobject *ifobj;
421 #ifdef CONFIG_NET_SWITCHDEV
422 int offload_fwd_mark;
424 struct hlist_head fdb_list;
427 struct br_input_skb_cb {
428 struct net_device *brdev;
431 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
435 u8 proxyarp_replied:1;
436 u8 src_port_isolated:1;
437 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
440 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
441 u8 br_netfilter_broute:1;
444 #ifdef CONFIG_NET_SWITCHDEV
445 int offload_fwd_mark;
449 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
451 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
452 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
454 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
457 #define br_printk(level, br, format, args...) \
458 printk(level "%s: " format, (br)->dev->name, ##args)
460 #define br_err(__br, format, args...) \
461 br_printk(KERN_ERR, __br, format, ##args)
462 #define br_warn(__br, format, args...) \
463 br_printk(KERN_WARNING, __br, format, ##args)
464 #define br_notice(__br, format, args...) \
465 br_printk(KERN_NOTICE, __br, format, ##args)
466 #define br_info(__br, format, args...) \
467 br_printk(KERN_INFO, __br, format, ##args)
469 #define br_debug(br, format, args...) \
470 pr_debug("%s: " format, (br)->dev->name, ##args)
472 /* called under bridge lock */
473 static inline int br_is_root_bridge(const struct net_bridge *br)
475 return !memcmp(&br->bridge_id, &br->designated_root, 8);
478 /* check if a VLAN entry is global */
479 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
481 return v->flags & BRIDGE_VLAN_INFO_MASTER;
484 /* check if a VLAN entry is used by the bridge */
485 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
487 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
490 /* check if we should use the vlan entry, returns false if it's only context */
491 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
493 if (br_vlan_is_master(v)) {
494 if (br_vlan_is_brentry(v))
503 static inline int br_opt_get(const struct net_bridge *br,
504 enum net_bridge_opts opt)
506 return test_bit(opt, &br->options);
509 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
510 struct netlink_ext_ack *extack);
511 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
512 int br_boolopt_multi_toggle(struct net_bridge *br,
513 struct br_boolopt_multi *bm,
514 struct netlink_ext_ack *extack);
515 void br_boolopt_multi_get(const struct net_bridge *br,
516 struct br_boolopt_multi *bm);
517 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
520 void br_dev_setup(struct net_device *dev);
521 void br_dev_delete(struct net_device *dev, struct list_head *list);
522 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
523 #ifdef CONFIG_NET_POLL_CONTROLLER
524 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
527 struct netpoll *np = p->np;
530 netpoll_send_skb(np, skb);
533 int br_netpoll_enable(struct net_bridge_port *p);
534 void br_netpoll_disable(struct net_bridge_port *p);
536 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
541 static inline int br_netpoll_enable(struct net_bridge_port *p)
546 static inline void br_netpoll_disable(struct net_bridge_port *p)
552 int br_fdb_init(void);
553 void br_fdb_fini(void);
554 int br_fdb_hash_init(struct net_bridge *br);
555 void br_fdb_hash_fini(struct net_bridge *br);
556 void br_fdb_flush(struct net_bridge *br);
557 void br_fdb_find_delete_local(struct net_bridge *br,
558 const struct net_bridge_port *p,
559 const unsigned char *addr, u16 vid);
560 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
561 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
562 void br_fdb_cleanup(struct work_struct *work);
563 void br_fdb_delete_by_port(struct net_bridge *br,
564 const struct net_bridge_port *p, u16 vid, int do_all);
565 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
566 const unsigned char *addr,
568 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
569 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
571 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
572 const unsigned char *addr, u16 vid);
573 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
574 const unsigned char *addr, u16 vid, bool added_by_user);
576 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
577 struct net_device *dev, const unsigned char *addr, u16 vid);
578 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
579 const unsigned char *addr, u16 vid, u16 nlh_flags,
580 struct netlink_ext_ack *extack);
581 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
582 struct net_device *dev, struct net_device *fdev, int *idx);
583 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
584 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
585 struct netlink_ext_ack *extack);
586 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
587 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
588 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
589 const unsigned char *addr, u16 vid,
591 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
592 const unsigned char *addr, u16 vid,
594 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
595 const unsigned char *addr, u16 vid, bool offloaded);
603 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
604 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
605 bool local_rcv, bool local_orig);
606 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
607 void br_flood(struct net_bridge *br, struct sk_buff *skb,
608 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
610 /* return true if both source port and dest port are isolated */
611 static inline bool br_skb_isolated(const struct net_bridge_port *to,
612 const struct sk_buff *skb)
614 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
615 (to->flags & BR_ISOLATED);
619 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
620 int br_add_bridge(struct net *net, const char *name);
621 int br_del_bridge(struct net *net, const char *name);
622 int br_add_if(struct net_bridge *br, struct net_device *dev,
623 struct netlink_ext_ack *extack);
624 int br_del_if(struct net_bridge *br, struct net_device *dev);
625 void br_mtu_auto_adjust(struct net_bridge *br);
626 netdev_features_t br_features_recompute(struct net_bridge *br,
627 netdev_features_t features);
628 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
629 void br_manage_promisc(struct net_bridge *br);
630 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
633 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
634 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
636 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
638 return rcu_dereference(dev->rx_handler) == br_handle_frame;
641 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
643 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
646 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
648 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
651 static inline struct net_bridge_port *
652 br_port_get_check_rtnl(const struct net_device *dev)
654 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
658 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
659 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
663 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
664 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
665 struct sk_buff *skb, u16 vid);
666 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
667 struct sk_buff *skb, u16 vid);
668 int br_multicast_add_port(struct net_bridge_port *port);
669 void br_multicast_del_port(struct net_bridge_port *port);
670 void br_multicast_enable_port(struct net_bridge_port *port);
671 void br_multicast_disable_port(struct net_bridge_port *port);
672 void br_multicast_init(struct net_bridge *br);
673 void br_multicast_open(struct net_bridge *br);
674 void br_multicast_stop(struct net_bridge *br);
675 void br_multicast_dev_del(struct net_bridge *br);
676 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
677 struct sk_buff *skb, bool local_rcv, bool local_orig);
678 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
679 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
680 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
681 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
682 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
683 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
684 #if IS_ENABLED(CONFIG_IPV6)
685 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
687 struct net_bridge_mdb_entry *
688 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
689 struct net_bridge_mdb_entry *
690 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
691 struct net_bridge_port_group *
692 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
693 struct net_bridge_port_group __rcu *next,
694 unsigned char flags, const unsigned char *src);
695 int br_mdb_hash_init(struct net_bridge *br);
696 void br_mdb_hash_fini(struct net_bridge *br);
697 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
698 struct br_ip *group, int type, u8 flags);
699 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
701 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
702 const struct sk_buff *skb, u8 type, u8 dir);
703 int br_multicast_init_stats(struct net_bridge *br);
704 void br_multicast_uninit_stats(struct net_bridge *br);
705 void br_multicast_get_stats(const struct net_bridge *br,
706 const struct net_bridge_port *p,
707 struct br_mcast_stats *dest);
708 void br_mdb_init(void);
709 void br_mdb_uninit(void);
710 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
711 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
713 #define mlock_dereference(X, br) \
714 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
716 static inline bool br_multicast_is_router(struct net_bridge *br)
718 return br->multicast_router == 2 ||
719 (br->multicast_router == 1 &&
720 timer_pending(&br->multicast_router_timer));
724 __br_multicast_querier_exists(struct net_bridge *br,
725 struct bridge_mcast_other_query *querier,
728 bool own_querier_enabled;
730 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
731 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
732 own_querier_enabled = false;
734 own_querier_enabled = true;
736 own_querier_enabled = false;
739 return time_is_before_jiffies(querier->delay_time) &&
740 (own_querier_enabled || timer_pending(&querier->timer));
743 static inline bool br_multicast_querier_exists(struct net_bridge *br,
746 switch (eth->h_proto) {
747 case (htons(ETH_P_IP)):
748 return __br_multicast_querier_exists(br,
749 &br->ip4_other_query, false);
750 #if IS_ENABLED(CONFIG_IPV6)
751 case (htons(ETH_P_IPV6)):
752 return __br_multicast_querier_exists(br,
753 &br->ip6_other_query, true);
760 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
762 return BR_INPUT_SKB_CB(skb)->igmp;
765 static inline int br_multicast_rcv(struct net_bridge *br,
766 struct net_bridge_port *port,
773 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
774 struct sk_buff *skb, u16 vid)
779 static inline int br_multicast_add_port(struct net_bridge_port *port)
784 static inline void br_multicast_del_port(struct net_bridge_port *port)
788 static inline void br_multicast_enable_port(struct net_bridge_port *port)
792 static inline void br_multicast_disable_port(struct net_bridge_port *port)
796 static inline void br_multicast_init(struct net_bridge *br)
800 static inline void br_multicast_open(struct net_bridge *br)
804 static inline void br_multicast_stop(struct net_bridge *br)
808 static inline void br_multicast_dev_del(struct net_bridge *br)
812 static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
814 bool local_rcv, bool local_orig)
818 static inline bool br_multicast_is_router(struct net_bridge *br)
823 static inline bool br_multicast_querier_exists(struct net_bridge *br,
829 static inline void br_mdb_init(void)
833 static inline void br_mdb_uninit(void)
837 static inline int br_mdb_hash_init(struct net_bridge *br)
842 static inline void br_mdb_hash_fini(struct net_bridge *br)
846 static inline void br_multicast_count(struct net_bridge *br,
847 const struct net_bridge_port *p,
848 const struct sk_buff *skb,
853 static inline int br_multicast_init_stats(struct net_bridge *br)
858 static inline void br_multicast_uninit_stats(struct net_bridge *br)
862 static inline int br_multicast_igmp_type(const struct sk_buff *skb)
869 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
870 bool br_allowed_ingress(const struct net_bridge *br,
871 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
873 bool br_allowed_egress(struct net_bridge_vlan_group *vg,
874 const struct sk_buff *skb);
875 bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
876 struct sk_buff *br_handle_vlan(struct net_bridge *br,
877 const struct net_bridge_port *port,
878 struct net_bridge_vlan_group *vg,
879 struct sk_buff *skb);
880 int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
881 bool *changed, struct netlink_ext_ack *extack);
882 int br_vlan_delete(struct net_bridge *br, u16 vid);
883 void br_vlan_flush(struct net_bridge *br);
884 struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
885 void br_recalculate_fwd_mask(struct net_bridge *br);
886 int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
887 int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
888 int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
889 int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
890 int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
891 int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
892 int br_vlan_init(struct net_bridge *br);
893 int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
894 int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
895 struct netlink_ext_ack *extack);
896 int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
897 bool *changed, struct netlink_ext_ack *extack);
898 int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
899 void nbp_vlan_flush(struct net_bridge_port *port);
900 int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
901 int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
902 void br_vlan_get_stats(const struct net_bridge_vlan *v,
903 struct br_vlan_stats *stats);
904 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
905 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
908 static inline struct net_bridge_vlan_group *br_vlan_group(
909 const struct net_bridge *br)
911 return rtnl_dereference(br->vlgrp);
914 static inline struct net_bridge_vlan_group *nbp_vlan_group(
915 const struct net_bridge_port *p)
917 return rtnl_dereference(p->vlgrp);
920 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
921 const struct net_bridge *br)
923 return rcu_dereference(br->vlgrp);
926 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
927 const struct net_bridge_port *p)
929 return rcu_dereference(p->vlgrp);
932 /* Since bridge now depends on 8021Q module, but the time bridge sees the
933 * skb, the vlan tag will always be present if the frame was tagged.
935 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
939 if (skb_vlan_tag_present(skb)) {
940 *vid = skb_vlan_tag_get_id(skb);
949 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
959 static inline bool br_allowed_ingress(const struct net_bridge *br,
960 struct net_bridge_vlan_group *vg,
967 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
968 const struct sk_buff *skb)
973 static inline bool br_should_learn(struct net_bridge_port *p,
974 struct sk_buff *skb, u16 *vid)
979 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
980 const struct net_bridge_port *port,
981 struct net_bridge_vlan_group *vg,
987 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
988 bool *changed, struct netlink_ext_ack *extack)
994 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
999 static inline void br_vlan_flush(struct net_bridge *br)
1003 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1007 static inline int br_vlan_init(struct net_bridge *br)
1012 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1013 bool *changed, struct netlink_ext_ack *extack)
1019 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1024 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1028 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1034 static inline int nbp_vlan_init(struct net_bridge_port *port,
1035 struct netlink_ext_ack *extack)
1040 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1045 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1050 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1056 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1062 static inline struct net_bridge_vlan_group *br_vlan_group(
1063 const struct net_bridge *br)
1068 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1069 const struct net_bridge_port *p)
1074 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1075 const struct net_bridge *br)
1080 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1081 const struct net_bridge_port *p)
1086 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1087 struct br_vlan_stats *stats)
1091 static inline void br_vlan_port_event(struct net_bridge_port *p,
1092 unsigned long event)
1096 static inline int br_vlan_bridge_event(struct net_device *dev,
1097 unsigned long event, void *ptr)
1104 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1106 extern const struct nf_br_ops __rcu *nf_br_ops;
1108 /* br_netfilter.c */
1109 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1110 int br_nf_core_init(void);
1111 void br_nf_core_fini(void);
1112 void br_netfilter_rtable_init(struct net_bridge *);
1114 static inline int br_nf_core_init(void) { return 0; }
1115 static inline void br_nf_core_fini(void) {}
1116 #define br_netfilter_rtable_init(x)
1120 void br_set_state(struct net_bridge_port *p, unsigned int state);
1121 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1122 void br_init_port(struct net_bridge_port *p);
1123 void br_become_designated_port(struct net_bridge_port *p);
1125 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1126 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1127 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1128 int br_set_max_age(struct net_bridge *br, unsigned long x);
1129 int __set_ageing_time(struct net_device *dev, unsigned long t);
1130 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1134 void br_stp_enable_bridge(struct net_bridge *br);
1135 void br_stp_disable_bridge(struct net_bridge *br);
1136 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1137 void br_stp_enable_port(struct net_bridge_port *p);
1138 void br_stp_disable_port(struct net_bridge_port *p);
1139 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1140 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1141 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1142 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1143 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1144 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1148 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1149 struct net_device *dev);
1151 /* br_stp_timer.c */
1152 void br_stp_timer_init(struct net_bridge *br);
1153 void br_stp_port_timer_init(struct net_bridge_port *p);
1154 unsigned long br_timer_value(const struct timer_list *timer);
1157 #if IS_ENABLED(CONFIG_ATM_LANE)
1158 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1162 extern struct rtnl_link_ops br_link_ops;
1163 int br_netlink_init(void);
1164 void br_netlink_fini(void);
1165 void br_ifinfo_notify(int event, const struct net_bridge *br,
1166 const struct net_bridge_port *port);
1167 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1168 struct netlink_ext_ack *extack);
1169 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1170 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1171 u32 filter_mask, int nlflags);
1175 extern const struct sysfs_ops brport_sysfs_ops;
1176 int br_sysfs_addif(struct net_bridge_port *p);
1177 int br_sysfs_renameif(struct net_bridge_port *p);
1180 int br_sysfs_addbr(struct net_device *dev);
1181 void br_sysfs_delbr(struct net_device *dev);
1185 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1186 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1187 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1188 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1189 #endif /* CONFIG_SYSFS */
1191 /* br_switchdev.c */
1192 #ifdef CONFIG_NET_SWITCHDEV
1193 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1194 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1195 struct sk_buff *skb);
1196 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1197 const struct sk_buff *skb);
1198 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1199 unsigned long flags,
1200 unsigned long mask);
1201 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1203 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1204 struct netlink_ext_ack *extack);
1205 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1207 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1209 skb->offload_fwd_mark = 0;
1212 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1217 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1218 struct sk_buff *skb)
1222 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1223 const struct sk_buff *skb)
1228 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1229 unsigned long flags,
1235 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1237 struct netlink_ext_ack *extack)
1242 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1248 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1252 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1255 #endif /* CONFIG_NET_SWITCHDEV */
1257 /* br_arp_nd_proxy.c */
1258 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1259 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1260 u16 vid, struct net_bridge_port *p);
1261 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1262 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1263 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);