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)
202 #define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
204 struct net_bridge_port_group {
205 struct net_bridge_port *port;
206 struct net_bridge_port_group __rcu *next;
207 struct hlist_node mglist;
209 struct timer_list timer;
212 unsigned char eth_addr[ETH_ALEN];
215 struct net_bridge_mdb_entry {
216 struct rhash_head rhnode;
217 struct net_bridge *br;
218 struct net_bridge_port_group __rcu *ports;
220 struct timer_list timer;
223 struct hlist_node mdb_node;
226 struct net_bridge_port {
227 struct net_bridge *br;
228 struct net_device *dev;
229 struct list_head list;
232 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
233 struct net_bridge_vlan_group __rcu *vlgrp;
235 struct net_bridge_port __rcu *backup_port;
241 unsigned char topology_change_ack;
242 unsigned char config_pending;
244 port_id designated_port;
245 bridge_id designated_root;
246 bridge_id designated_bridge;
249 unsigned long designated_age;
251 struct timer_list forward_delay_timer;
252 struct timer_list hold_timer;
253 struct timer_list message_age_timer;
257 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
258 struct bridge_mcast_own_query ip4_own_query;
259 #if IS_ENABLED(CONFIG_IPV6)
260 struct bridge_mcast_own_query ip6_own_query;
261 #endif /* IS_ENABLED(CONFIG_IPV6) */
262 unsigned char multicast_router;
263 struct bridge_mcast_stats __percpu *mcast_stats;
264 struct timer_list multicast_router_timer;
265 struct hlist_head mglist;
266 struct hlist_node rlist;
270 char sysfs_name[IFNAMSIZ];
273 #ifdef CONFIG_NET_POLL_CONTROLLER
276 #ifdef CONFIG_NET_SWITCHDEV
277 int offload_fwd_mark;
280 u16 backup_redirected_cnt;
283 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
285 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
286 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
288 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
290 return rcu_dereference(dev->rx_handler_data);
293 static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
295 return netif_is_bridge_port(dev) ?
296 rtnl_dereference(dev->rx_handler_data) : NULL;
299 static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
301 return netif_is_bridge_port(dev) ?
302 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
305 enum net_bridge_opts {
307 BROPT_VLAN_STATS_ENABLED,
308 BROPT_NF_CALL_IPTABLES,
309 BROPT_NF_CALL_IP6TABLES,
310 BROPT_NF_CALL_ARPTABLES,
311 BROPT_GROUP_ADDR_SET,
312 BROPT_MULTICAST_ENABLED,
313 BROPT_MULTICAST_QUERIER,
314 BROPT_MULTICAST_QUERY_USE_IFADDR,
315 BROPT_MULTICAST_STATS_ENABLED,
317 BROPT_NEIGH_SUPPRESS_ENABLED,
318 BROPT_MTU_SET_BY_USER,
319 BROPT_VLAN_STATS_PER_PORT,
321 BROPT_VLAN_BRIDGE_BINDING,
326 spinlock_t hash_lock;
327 struct list_head port_list;
328 struct net_device *dev;
329 struct pcpu_sw_netstats __percpu *stats;
330 unsigned long options;
331 /* These fields are accessed on each packet */
332 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
335 struct net_bridge_vlan_group __rcu *vlgrp;
338 struct rhashtable fdb_hash_tbl;
339 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
341 struct rtable fake_rtable;
342 struct rt6_info fake_rt6_info;
346 u16 group_fwd_mask_required;
349 bridge_id designated_root;
351 unsigned char topology_change;
352 unsigned char topology_change_detected;
354 unsigned long max_age;
355 unsigned long hello_time;
356 unsigned long forward_delay;
357 unsigned long ageing_time;
358 unsigned long bridge_max_age;
359 unsigned long bridge_hello_time;
360 unsigned long bridge_forward_delay;
361 unsigned long bridge_ageing_time;
364 u8 group_addr[ETH_ALEN];
367 BR_NO_STP, /* no spanning tree */
368 BR_KERNEL_STP, /* old STP in kernel */
369 BR_USER_STP, /* new RSTP in userspace */
372 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
376 u32 multicast_last_member_count;
377 u32 multicast_startup_query_count;
379 u8 multicast_igmp_version;
381 #if IS_ENABLED(CONFIG_IPV6)
382 u8 multicast_mld_version;
384 spinlock_t multicast_lock;
385 unsigned long multicast_last_member_interval;
386 unsigned long multicast_membership_interval;
387 unsigned long multicast_querier_interval;
388 unsigned long multicast_query_interval;
389 unsigned long multicast_query_response_interval;
390 unsigned long multicast_startup_query_interval;
392 struct rhashtable mdb_hash_tbl;
394 struct hlist_head mdb_list;
395 struct hlist_head router_list;
397 struct timer_list multicast_router_timer;
398 struct bridge_mcast_other_query ip4_other_query;
399 struct bridge_mcast_own_query ip4_own_query;
400 struct bridge_mcast_querier ip4_querier;
401 struct bridge_mcast_stats __percpu *mcast_stats;
402 #if IS_ENABLED(CONFIG_IPV6)
403 struct bridge_mcast_other_query ip6_other_query;
404 struct bridge_mcast_own_query ip6_own_query;
405 struct bridge_mcast_querier ip6_querier;
406 #endif /* IS_ENABLED(CONFIG_IPV6) */
409 struct timer_list hello_timer;
410 struct timer_list tcn_timer;
411 struct timer_list topology_change_timer;
412 struct delayed_work gc_work;
413 struct kobject *ifobj;
416 #ifdef CONFIG_NET_SWITCHDEV
417 int offload_fwd_mark;
419 struct hlist_head fdb_list;
422 struct br_input_skb_cb {
423 struct net_device *brdev;
426 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
430 u8 proxyarp_replied:1;
431 u8 src_port_isolated:1;
432 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
435 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
436 u8 br_netfilter_broute:1;
439 #ifdef CONFIG_NET_SWITCHDEV
440 int offload_fwd_mark;
444 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
446 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
447 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
449 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
452 #define br_printk(level, br, format, args...) \
453 printk(level "%s: " format, (br)->dev->name, ##args)
455 #define br_err(__br, format, args...) \
456 br_printk(KERN_ERR, __br, format, ##args)
457 #define br_warn(__br, format, args...) \
458 br_printk(KERN_WARNING, __br, format, ##args)
459 #define br_notice(__br, format, args...) \
460 br_printk(KERN_NOTICE, __br, format, ##args)
461 #define br_info(__br, format, args...) \
462 br_printk(KERN_INFO, __br, format, ##args)
464 #define br_debug(br, format, args...) \
465 pr_debug("%s: " format, (br)->dev->name, ##args)
467 /* called under bridge lock */
468 static inline int br_is_root_bridge(const struct net_bridge *br)
470 return !memcmp(&br->bridge_id, &br->designated_root, 8);
473 /* check if a VLAN entry is global */
474 static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
476 return v->flags & BRIDGE_VLAN_INFO_MASTER;
479 /* check if a VLAN entry is used by the bridge */
480 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
482 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
485 /* check if we should use the vlan entry, returns false if it's only context */
486 static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
488 if (br_vlan_is_master(v)) {
489 if (br_vlan_is_brentry(v))
498 static inline int br_opt_get(const struct net_bridge *br,
499 enum net_bridge_opts opt)
501 return test_bit(opt, &br->options);
504 int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
505 struct netlink_ext_ack *extack);
506 int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
507 int br_boolopt_multi_toggle(struct net_bridge *br,
508 struct br_boolopt_multi *bm,
509 struct netlink_ext_ack *extack);
510 void br_boolopt_multi_get(const struct net_bridge *br,
511 struct br_boolopt_multi *bm);
512 void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
515 void br_dev_setup(struct net_device *dev);
516 void br_dev_delete(struct net_device *dev, struct list_head *list);
517 netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
518 #ifdef CONFIG_NET_POLL_CONTROLLER
519 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
522 struct netpoll *np = p->np;
525 netpoll_send_skb(np, skb);
528 int br_netpoll_enable(struct net_bridge_port *p);
529 void br_netpoll_disable(struct net_bridge_port *p);
531 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
536 static inline int br_netpoll_enable(struct net_bridge_port *p)
541 static inline void br_netpoll_disable(struct net_bridge_port *p)
547 int br_fdb_init(void);
548 void br_fdb_fini(void);
549 int br_fdb_hash_init(struct net_bridge *br);
550 void br_fdb_hash_fini(struct net_bridge *br);
551 void br_fdb_flush(struct net_bridge *br);
552 void br_fdb_find_delete_local(struct net_bridge *br,
553 const struct net_bridge_port *p,
554 const unsigned char *addr, u16 vid);
555 void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
556 void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
557 void br_fdb_cleanup(struct work_struct *work);
558 void br_fdb_delete_by_port(struct net_bridge *br,
559 const struct net_bridge_port *p, u16 vid, int do_all);
560 struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
561 const unsigned char *addr,
563 int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
564 int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
566 int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
567 const unsigned char *addr, u16 vid);
568 void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
569 const unsigned char *addr, u16 vid, bool added_by_user);
571 int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
572 struct net_device *dev, const unsigned char *addr, u16 vid);
573 int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
574 const unsigned char *addr, u16 vid, u16 nlh_flags,
575 struct netlink_ext_ack *extack);
576 int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
577 struct net_device *dev, struct net_device *fdev, int *idx);
578 int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
579 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
580 struct netlink_ext_ack *extack);
581 int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
582 void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
583 int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
584 const unsigned char *addr, u16 vid,
586 int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
587 const unsigned char *addr, u16 vid,
589 void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
590 const unsigned char *addr, u16 vid, bool offloaded);
598 int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
599 void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
600 bool local_rcv, bool local_orig);
601 int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
602 void br_flood(struct net_bridge *br, struct sk_buff *skb,
603 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
605 /* return true if both source port and dest port are isolated */
606 static inline bool br_skb_isolated(const struct net_bridge_port *to,
607 const struct sk_buff *skb)
609 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
610 (to->flags & BR_ISOLATED);
614 void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
615 int br_add_bridge(struct net *net, const char *name);
616 int br_del_bridge(struct net *net, const char *name);
617 int br_add_if(struct net_bridge *br, struct net_device *dev,
618 struct netlink_ext_ack *extack);
619 int br_del_if(struct net_bridge *br, struct net_device *dev);
620 void br_mtu_auto_adjust(struct net_bridge *br);
621 netdev_features_t br_features_recompute(struct net_bridge *br,
622 netdev_features_t features);
623 void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
624 void br_manage_promisc(struct net_bridge *br);
625 int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
628 int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
629 rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
631 static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
633 return rcu_dereference(dev->rx_handler) == br_handle_frame;
636 static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
638 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
641 static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
643 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
646 static inline struct net_bridge_port *
647 br_port_get_check_rtnl(const struct net_device *dev)
649 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
653 int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
654 int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
658 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
659 int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
660 struct sk_buff *skb, u16 vid);
661 struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
662 struct sk_buff *skb, u16 vid);
663 int br_multicast_add_port(struct net_bridge_port *port);
664 void br_multicast_del_port(struct net_bridge_port *port);
665 void br_multicast_enable_port(struct net_bridge_port *port);
666 void br_multicast_disable_port(struct net_bridge_port *port);
667 void br_multicast_init(struct net_bridge *br);
668 void br_multicast_open(struct net_bridge *br);
669 void br_multicast_stop(struct net_bridge *br);
670 void br_multicast_dev_del(struct net_bridge *br);
671 void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
672 struct sk_buff *skb, bool local_rcv, bool local_orig);
673 int br_multicast_set_router(struct net_bridge *br, unsigned long val);
674 int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
675 int br_multicast_toggle(struct net_bridge *br, unsigned long val);
676 int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
677 int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
678 int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
679 #if IS_ENABLED(CONFIG_IPV6)
680 int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
682 struct net_bridge_mdb_entry *
683 br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
684 struct net_bridge_mdb_entry *
685 br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
686 struct net_bridge_port_group *
687 br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
688 struct net_bridge_port_group __rcu *next,
689 unsigned char flags, const unsigned char *src);
690 int br_mdb_hash_init(struct net_bridge *br);
691 void br_mdb_hash_fini(struct net_bridge *br);
692 void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
693 struct br_ip *group, int type, u8 flags);
694 void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
696 void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
697 const struct sk_buff *skb, u8 type, u8 dir);
698 int br_multicast_init_stats(struct net_bridge *br);
699 void br_multicast_uninit_stats(struct net_bridge *br);
700 void br_multicast_get_stats(const struct net_bridge *br,
701 const struct net_bridge_port *p,
702 struct br_mcast_stats *dest);
703 void br_mdb_init(void);
704 void br_mdb_uninit(void);
705 void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
706 void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
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);
899 void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
900 int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
903 static inline struct net_bridge_vlan_group *br_vlan_group(
904 const struct net_bridge *br)
906 return rtnl_dereference(br->vlgrp);
909 static inline struct net_bridge_vlan_group *nbp_vlan_group(
910 const struct net_bridge_port *p)
912 return rtnl_dereference(p->vlgrp);
915 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
916 const struct net_bridge *br)
918 return rcu_dereference(br->vlgrp);
921 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
922 const struct net_bridge_port *p)
924 return rcu_dereference(p->vlgrp);
927 /* Since bridge now depends on 8021Q module, but the time bridge sees the
928 * skb, the vlan tag will always be present if the frame was tagged.
930 static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
934 if (skb_vlan_tag_present(skb)) {
935 *vid = skb_vlan_tag_get_id(skb);
944 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
954 static inline bool br_allowed_ingress(const struct net_bridge *br,
955 struct net_bridge_vlan_group *vg,
962 static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
963 const struct sk_buff *skb)
968 static inline bool br_should_learn(struct net_bridge_port *p,
969 struct sk_buff *skb, u16 *vid)
974 static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
975 const struct net_bridge_port *port,
976 struct net_bridge_vlan_group *vg,
982 static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
983 bool *changed, struct netlink_ext_ack *extack)
989 static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
994 static inline void br_vlan_flush(struct net_bridge *br)
998 static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1002 static inline int br_vlan_init(struct net_bridge *br)
1007 static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1008 bool *changed, struct netlink_ext_ack *extack)
1014 static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1019 static inline void nbp_vlan_flush(struct net_bridge_port *port)
1023 static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1029 static inline int nbp_vlan_init(struct net_bridge_port *port,
1030 struct netlink_ext_ack *extack)
1035 static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1040 static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1045 static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1051 static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1057 static inline struct net_bridge_vlan_group *br_vlan_group(
1058 const struct net_bridge *br)
1063 static inline struct net_bridge_vlan_group *nbp_vlan_group(
1064 const struct net_bridge_port *p)
1069 static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1070 const struct net_bridge *br)
1075 static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1076 const struct net_bridge_port *p)
1081 static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1082 struct br_vlan_stats *stats)
1086 static inline void br_vlan_port_event(struct net_bridge_port *p,
1087 unsigned long event)
1091 static inline int br_vlan_bridge_event(struct net_device *dev,
1092 unsigned long event, void *ptr)
1099 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1101 extern const struct nf_br_ops __rcu *nf_br_ops;
1103 /* br_netfilter.c */
1104 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1105 int br_nf_core_init(void);
1106 void br_nf_core_fini(void);
1107 void br_netfilter_rtable_init(struct net_bridge *);
1109 static inline int br_nf_core_init(void) { return 0; }
1110 static inline void br_nf_core_fini(void) {}
1111 #define br_netfilter_rtable_init(x)
1115 void br_set_state(struct net_bridge_port *p, unsigned int state);
1116 struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1117 void br_init_port(struct net_bridge_port *p);
1118 void br_become_designated_port(struct net_bridge_port *p);
1120 void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1121 int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1122 int br_set_hello_time(struct net_bridge *br, unsigned long x);
1123 int br_set_max_age(struct net_bridge *br, unsigned long x);
1124 int __set_ageing_time(struct net_device *dev, unsigned long t);
1125 int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1129 void br_stp_enable_bridge(struct net_bridge *br);
1130 void br_stp_disable_bridge(struct net_bridge *br);
1131 void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1132 void br_stp_enable_port(struct net_bridge_port *p);
1133 void br_stp_disable_port(struct net_bridge_port *p);
1134 bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1135 void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1136 void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1137 int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1138 int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1139 ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1143 void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1144 struct net_device *dev);
1146 /* br_stp_timer.c */
1147 void br_stp_timer_init(struct net_bridge *br);
1148 void br_stp_port_timer_init(struct net_bridge_port *p);
1149 unsigned long br_timer_value(const struct timer_list *timer);
1152 #if IS_ENABLED(CONFIG_ATM_LANE)
1153 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1157 extern struct rtnl_link_ops br_link_ops;
1158 int br_netlink_init(void);
1159 void br_netlink_fini(void);
1160 void br_ifinfo_notify(int event, const struct net_bridge *br,
1161 const struct net_bridge_port *port);
1162 int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1163 struct netlink_ext_ack *extack);
1164 int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1165 int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1166 u32 filter_mask, int nlflags);
1170 extern const struct sysfs_ops brport_sysfs_ops;
1171 int br_sysfs_addif(struct net_bridge_port *p);
1172 int br_sysfs_renameif(struct net_bridge_port *p);
1175 int br_sysfs_addbr(struct net_device *dev);
1176 void br_sysfs_delbr(struct net_device *dev);
1180 static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1181 static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1182 static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1183 static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1184 #endif /* CONFIG_SYSFS */
1186 /* br_switchdev.c */
1187 #ifdef CONFIG_NET_SWITCHDEV
1188 int nbp_switchdev_mark_set(struct net_bridge_port *p);
1189 void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1190 struct sk_buff *skb);
1191 bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1192 const struct sk_buff *skb);
1193 int br_switchdev_set_port_flag(struct net_bridge_port *p,
1194 unsigned long flags,
1195 unsigned long mask);
1196 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1198 int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1199 struct netlink_ext_ack *extack);
1200 int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1202 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1204 skb->offload_fwd_mark = 0;
1207 static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1212 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1213 struct sk_buff *skb)
1217 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1218 const struct sk_buff *skb)
1223 static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1224 unsigned long flags,
1230 static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1232 struct netlink_ext_ack *extack)
1237 static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1243 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1247 static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1250 #endif /* CONFIG_NET_SWITCHDEV */
1252 /* br_arp_nd_proxy.c */
1253 void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1254 void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1255 u16 vid, struct net_bridge_port *p);
1256 void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1257 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1258 struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);