2 * Linux ethernet bridge
5 * Lennert Buytenhek <buytenh@gnu.org>
7 * This program is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version
10 * 2 of the License, or (at your option) any later version.
16 #include <linux/netdevice.h>
17 #include <linux/if_bridge.h>
18 #include <linux/netpoll.h>
19 #include <linux/u64_stats_sync.h>
20 #include <net/route.h>
21 #include <net/ip6_fib.h>
22 #include <linux/if_vlan.h>
23 #include <linux/rhashtable.h>
24 #include <linux/refcount.h>
26 #define BR_HASH_BITS 8
27 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
29 #define BR_HOLD_TIME (1*HZ)
31 #define BR_PORT_BITS 10
32 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
34 #define BR_VERSION "2.3"
36 /* Control of forwarding link local multicast */
37 #define BR_GROUPFWD_DEFAULT 0
38 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
40 BR_GROUPFWD_STP
= BIT(0),
41 BR_GROUPFWD_MACPAUSE
= BIT(1),
42 BR_GROUPFWD_LACP
= BIT(2),
45 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
47 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
48 #define BR_GROUPFWD_8021AD 0xB801u
50 /* Path to usermode spanning tree program */
51 #define BR_STP_PROG "/sbin/bridge-stp"
53 typedef struct bridge_id bridge_id
;
54 typedef struct mac_addr mac_addr
;
55 typedef __u16 port_id
;
59 unsigned char prio
[2];
60 unsigned char addr
[ETH_ALEN
];
65 unsigned char addr
[ETH_ALEN
];
68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
70 struct bridge_mcast_own_query
{
71 struct timer_list timer
;
76 struct bridge_mcast_other_query
{
77 struct timer_list timer
;
78 unsigned long delay_time
;
81 /* selected querier */
82 struct bridge_mcast_querier
{
84 struct net_bridge_port __rcu
*port
;
87 /* IGMP/MLD statistics */
88 struct bridge_mcast_stats
{
89 struct br_mcast_stats mstats
;
90 struct u64_stats_sync syncp
;
94 struct br_vlan_stats
{
99 struct u64_stats_sync syncp
;
102 struct br_tunnel_info
{
104 struct metadata_dst
*tunnel_dst
;
108 * struct net_bridge_vlan - per-vlan entry
110 * @vnode: rhashtable member
112 * @flags: bridge vlan flags
113 * @stats: per-cpu VLAN statistics
114 * @br: if MASTER flag set, this points to a bridge struct
115 * @port: if MASTER flag unset, this points to a port struct
116 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
117 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
118 * for this VLAN entry
119 * @vlist: sorted list of VLAN entries
120 * @rcu: used for entry destruction
122 * This structure is shared between the global per-VLAN entries contained in
123 * the bridge rhashtable and the local per-port per-VLAN entries contained in
124 * the port's rhashtable. The union entries should be interpreted depending on
125 * the entry flags that are set.
127 struct net_bridge_vlan
{
128 struct rhash_head vnode
;
129 struct rhash_head tnode
;
132 struct br_vlan_stats __percpu
*stats
;
134 struct net_bridge
*br
;
135 struct net_bridge_port
*port
;
139 struct net_bridge_vlan
*brvlan
;
142 struct br_tunnel_info tinfo
;
144 struct list_head vlist
;
150 * struct net_bridge_vlan_group
152 * @vlan_hash: VLAN entry rhashtable
153 * @vlan_list: sorted VLAN entry list
154 * @num_vlans: number of total VLAN entries
155 * @pvid: PVID VLAN id
157 * IMPORTANT: Be careful when checking if there're VLAN entries using list
158 * primitives because the bridge can have entries in its list which
159 * are just for global context but not for filtering, i.e. they have
160 * the master flag set but not the brentry flag. If you have to check
161 * if there're "real" entries in the bridge please test @num_vlans
163 struct net_bridge_vlan_group
{
164 struct rhashtable vlan_hash
;
165 struct rhashtable tunnel_hash
;
166 struct list_head vlan_list
;
171 struct net_bridge_fdb_entry
{
172 struct hlist_node hlist
;
173 struct net_bridge_port
*dst
;
177 unsigned char is_local
:1,
180 added_by_external_learn
:1,
183 /* write-heavy members should not affect lookups */
184 unsigned long updated ____cacheline_aligned_in_smp
;
190 #define MDB_PG_FLAGS_PERMANENT BIT(0)
191 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
193 struct net_bridge_port_group
{
194 struct net_bridge_port
*port
;
195 struct net_bridge_port_group __rcu
*next
;
196 struct hlist_node mglist
;
198 struct timer_list timer
;
201 unsigned char eth_addr
[ETH_ALEN
];
204 struct net_bridge_mdb_entry
206 struct hlist_node hlist
[2];
207 struct net_bridge
*br
;
208 struct net_bridge_port_group __rcu
*ports
;
210 struct timer_list timer
;
215 struct net_bridge_mdb_htable
217 struct hlist_head
*mhash
;
219 struct net_bridge_mdb_htable
*old
;
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
;
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
;
281 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
282 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
284 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
286 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
288 return rcu_dereference(dev
->rx_handler_data
);
291 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
293 return br_port_exists(dev
) ?
294 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
297 static inline struct net_bridge_port
*br_port_get_rtnl_rcu(const struct net_device
*dev
)
299 return br_port_exists(dev
) ?
300 rcu_dereference_rtnl(dev
->rx_handler_data
) : NULL
;
305 spinlock_t hash_lock
;
306 struct list_head port_list
;
307 struct net_device
*dev
;
308 struct pcpu_sw_netstats __percpu
*stats
;
309 /* These fields are accessed on each packet */
310 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
312 u8 vlan_stats_enabled
;
315 struct net_bridge_vlan_group __rcu
*vlgrp
;
318 struct hlist_head hash
[BR_HASH_SIZE
];
319 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
321 struct rtable fake_rtable
;
322 struct rt6_info fake_rt6_info
;
324 bool nf_call_iptables
;
325 bool nf_call_ip6tables
;
326 bool nf_call_arptables
;
329 u16 group_fwd_mask_required
;
332 bridge_id designated_root
;
335 unsigned char topology_change
;
336 unsigned char topology_change_detected
;
338 unsigned long max_age
;
339 unsigned long hello_time
;
340 unsigned long forward_delay
;
341 unsigned long ageing_time
;
342 unsigned long bridge_max_age
;
343 unsigned long bridge_hello_time
;
344 unsigned long bridge_forward_delay
;
345 unsigned long bridge_ageing_time
;
347 u8 group_addr
[ETH_ALEN
];
351 BR_NO_STP
, /* no spanning tree */
352 BR_KERNEL_STP
, /* old STP in kernel */
353 BR_USER_STP
, /* new RSTP in userspace */
356 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
357 unsigned char multicast_router
;
359 u8 multicast_disabled
:1;
360 u8 multicast_querier
:1;
361 u8 multicast_query_use_ifaddr
:1;
363 u8 multicast_stats_enabled
:1;
368 u32 multicast_last_member_count
;
369 u32 multicast_startup_query_count
;
371 u8 multicast_igmp_version
;
373 unsigned long multicast_last_member_interval
;
374 unsigned long multicast_membership_interval
;
375 unsigned long multicast_querier_interval
;
376 unsigned long multicast_query_interval
;
377 unsigned long multicast_query_response_interval
;
378 unsigned long multicast_startup_query_interval
;
380 spinlock_t multicast_lock
;
381 struct net_bridge_mdb_htable __rcu
*mdb
;
382 struct hlist_head router_list
;
384 struct timer_list multicast_router_timer
;
385 struct bridge_mcast_other_query ip4_other_query
;
386 struct bridge_mcast_own_query ip4_own_query
;
387 struct bridge_mcast_querier ip4_querier
;
388 struct bridge_mcast_stats __percpu
*mcast_stats
;
389 #if IS_ENABLED(CONFIG_IPV6)
390 struct bridge_mcast_other_query ip6_other_query
;
391 struct bridge_mcast_own_query ip6_own_query
;
392 struct bridge_mcast_querier ip6_querier
;
393 u8 multicast_mld_version
;
394 #endif /* IS_ENABLED(CONFIG_IPV6) */
397 struct timer_list hello_timer
;
398 struct timer_list tcn_timer
;
399 struct timer_list topology_change_timer
;
400 struct delayed_work gc_work
;
401 struct kobject
*ifobj
;
404 #ifdef CONFIG_NET_SWITCHDEV
405 int offload_fwd_mark
;
407 bool neigh_suppress_enabled
;
410 struct br_input_skb_cb
{
411 struct net_device
*brdev
;
413 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
418 bool proxyarp_replied
;
420 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
424 #ifdef CONFIG_NET_SWITCHDEV
425 int offload_fwd_mark
;
429 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
431 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
432 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
434 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
437 #define br_printk(level, br, format, args...) \
438 printk(level "%s: " format, (br)->dev->name, ##args)
440 #define br_err(__br, format, args...) \
441 br_printk(KERN_ERR, __br, format, ##args)
442 #define br_warn(__br, format, args...) \
443 br_printk(KERN_WARNING, __br, format, ##args)
444 #define br_notice(__br, format, args...) \
445 br_printk(KERN_NOTICE, __br, format, ##args)
446 #define br_info(__br, format, args...) \
447 br_printk(KERN_INFO, __br, format, ##args)
449 #define br_debug(br, format, args...) \
450 pr_debug("%s: " format, (br)->dev->name, ##args)
452 /* called under bridge lock */
453 static inline int br_is_root_bridge(const struct net_bridge
*br
)
455 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
458 /* check if a VLAN entry is global */
459 static inline bool br_vlan_is_master(const struct net_bridge_vlan
*v
)
461 return v
->flags
& BRIDGE_VLAN_INFO_MASTER
;
464 /* check if a VLAN entry is used by the bridge */
465 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan
*v
)
467 return v
->flags
& BRIDGE_VLAN_INFO_BRENTRY
;
470 /* check if we should use the vlan entry, returns false if it's only context */
471 static inline bool br_vlan_should_use(const struct net_bridge_vlan
*v
)
473 if (br_vlan_is_master(v
)) {
474 if (br_vlan_is_brentry(v
))
484 void br_dev_setup(struct net_device
*dev
);
485 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
486 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
487 #ifdef CONFIG_NET_POLL_CONTROLLER
488 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
491 struct netpoll
*np
= p
->np
;
494 netpoll_send_skb(np
, skb
);
497 int br_netpoll_enable(struct net_bridge_port
*p
);
498 void br_netpoll_disable(struct net_bridge_port
*p
);
500 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
505 static inline int br_netpoll_enable(struct net_bridge_port
*p
)
510 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
516 int br_fdb_init(void);
517 void br_fdb_fini(void);
518 void br_fdb_flush(struct net_bridge
*br
);
519 void br_fdb_find_delete_local(struct net_bridge
*br
,
520 const struct net_bridge_port
*p
,
521 const unsigned char *addr
, u16 vid
);
522 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
523 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
524 void br_fdb_cleanup(struct work_struct
*work
);
525 void br_fdb_delete_by_port(struct net_bridge
*br
,
526 const struct net_bridge_port
*p
, u16 vid
, int do_all
);
527 struct net_bridge_fdb_entry
*br_fdb_find_rcu(struct net_bridge
*br
,
528 const unsigned char *addr
,
530 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
531 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
533 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
534 const unsigned char *addr
, u16 vid
);
535 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
536 const unsigned char *addr
, u16 vid
, bool added_by_user
);
538 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
539 struct net_device
*dev
, const unsigned char *addr
, u16 vid
);
540 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
541 const unsigned char *addr
, u16 vid
, u16 nlh_flags
);
542 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
543 struct net_device
*dev
, struct net_device
*fdev
, int *idx
);
544 int br_fdb_sync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
545 void br_fdb_unsync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
546 int br_fdb_external_learn_add(struct net_bridge
*br
, struct net_bridge_port
*p
,
547 const unsigned char *addr
, u16 vid
);
548 int br_fdb_external_learn_del(struct net_bridge
*br
, struct net_bridge_port
*p
,
549 const unsigned char *addr
, u16 vid
);
550 void br_fdb_offloaded_set(struct net_bridge
*br
, struct net_bridge_port
*p
,
551 const unsigned char *addr
, u16 vid
);
559 int br_dev_queue_push_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
560 void br_forward(const struct net_bridge_port
*to
, struct sk_buff
*skb
,
561 bool local_rcv
, bool local_orig
);
562 int br_forward_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
563 void br_flood(struct net_bridge
*br
, struct sk_buff
*skb
,
564 enum br_pkt_type pkt_type
, bool local_rcv
, bool local_orig
);
567 void br_port_carrier_check(struct net_bridge_port
*p
);
568 int br_add_bridge(struct net
*net
, const char *name
);
569 int br_del_bridge(struct net
*net
, const char *name
);
570 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
,
571 struct netlink_ext_ack
*extack
);
572 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
573 int br_min_mtu(const struct net_bridge
*br
);
574 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
575 netdev_features_t features
);
576 void br_port_flags_change(struct net_bridge_port
*port
, unsigned long mask
);
577 void br_manage_promisc(struct net_bridge
*br
);
580 int br_handle_frame_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
581 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
583 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
585 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
588 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
590 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
594 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
595 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
599 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
600 extern unsigned int br_mdb_rehash_seq
;
601 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
602 struct sk_buff
*skb
, u16 vid
);
603 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
604 struct sk_buff
*skb
, u16 vid
);
605 int br_multicast_add_port(struct net_bridge_port
*port
);
606 void br_multicast_del_port(struct net_bridge_port
*port
);
607 void br_multicast_enable_port(struct net_bridge_port
*port
);
608 void br_multicast_disable_port(struct net_bridge_port
*port
);
609 void br_multicast_init(struct net_bridge
*br
);
610 void br_multicast_open(struct net_bridge
*br
);
611 void br_multicast_stop(struct net_bridge
*br
);
612 void br_multicast_dev_del(struct net_bridge
*br
);
613 void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
614 struct sk_buff
*skb
, bool local_rcv
, bool local_orig
);
615 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
616 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
617 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
618 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
619 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
620 int br_multicast_set_igmp_version(struct net_bridge
*br
, unsigned long val
);
621 #if IS_ENABLED(CONFIG_IPV6)
622 int br_multicast_set_mld_version(struct net_bridge
*br
, unsigned long val
);
624 struct net_bridge_mdb_entry
*
625 br_mdb_ip_get(struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
);
626 struct net_bridge_mdb_entry
*
627 br_multicast_new_group(struct net_bridge
*br
, struct net_bridge_port
*port
,
628 struct br_ip
*group
);
629 void br_multicast_free_pg(struct rcu_head
*head
);
630 struct net_bridge_port_group
*
631 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
632 struct net_bridge_port_group __rcu
*next
,
633 unsigned char flags
, const unsigned char *src
);
634 void br_mdb_init(void);
635 void br_mdb_uninit(void);
636 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
637 struct br_ip
*group
, int type
, u8 flags
);
638 void br_rtr_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
640 void br_multicast_count(struct net_bridge
*br
, const struct net_bridge_port
*p
,
641 const struct sk_buff
*skb
, u8 type
, u8 dir
);
642 int br_multicast_init_stats(struct net_bridge
*br
);
643 void br_multicast_uninit_stats(struct net_bridge
*br
);
644 void br_multicast_get_stats(const struct net_bridge
*br
,
645 const struct net_bridge_port
*p
,
646 struct br_mcast_stats
*dest
);
648 #define mlock_dereference(X, br) \
649 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
651 static inline bool br_multicast_is_router(struct net_bridge
*br
)
653 return br
->multicast_router
== 2 ||
654 (br
->multicast_router
== 1 &&
655 timer_pending(&br
->multicast_router_timer
));
659 __br_multicast_querier_exists(struct net_bridge
*br
,
660 struct bridge_mcast_other_query
*querier
,
663 bool own_querier_enabled
;
665 if (br
->multicast_querier
) {
666 if (is_ipv6
&& !br
->has_ipv6_addr
)
667 own_querier_enabled
= false;
669 own_querier_enabled
= true;
671 own_querier_enabled
= false;
674 return time_is_before_jiffies(querier
->delay_time
) &&
675 (own_querier_enabled
|| timer_pending(&querier
->timer
));
678 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
681 switch (eth
->h_proto
) {
682 case (htons(ETH_P_IP
)):
683 return __br_multicast_querier_exists(br
,
684 &br
->ip4_other_query
, false);
685 #if IS_ENABLED(CONFIG_IPV6)
686 case (htons(ETH_P_IPV6
)):
687 return __br_multicast_querier_exists(br
,
688 &br
->ip6_other_query
, true);
695 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
697 return BR_INPUT_SKB_CB(skb
)->igmp
;
700 static inline int br_multicast_rcv(struct net_bridge
*br
,
701 struct net_bridge_port
*port
,
708 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
709 struct sk_buff
*skb
, u16 vid
)
714 static inline int br_multicast_add_port(struct net_bridge_port
*port
)
719 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
723 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
727 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
731 static inline void br_multicast_init(struct net_bridge
*br
)
735 static inline void br_multicast_open(struct net_bridge
*br
)
739 static inline void br_multicast_stop(struct net_bridge
*br
)
743 static inline void br_multicast_dev_del(struct net_bridge
*br
)
747 static inline void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
749 bool local_rcv
, bool local_orig
)
753 static inline bool br_multicast_is_router(struct net_bridge
*br
)
758 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
764 static inline void br_mdb_init(void)
768 static inline void br_mdb_uninit(void)
772 static inline void br_multicast_count(struct net_bridge
*br
,
773 const struct net_bridge_port
*p
,
774 const struct sk_buff
*skb
,
779 static inline int br_multicast_init_stats(struct net_bridge
*br
)
784 static inline void br_multicast_uninit_stats(struct net_bridge
*br
)
788 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
795 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
796 bool br_allowed_ingress(const struct net_bridge
*br
,
797 struct net_bridge_vlan_group
*vg
, struct sk_buff
*skb
,
799 bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
800 const struct sk_buff
*skb
);
801 bool br_should_learn(struct net_bridge_port
*p
, struct sk_buff
*skb
, u16
*vid
);
802 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
803 const struct net_bridge_port
*port
,
804 struct net_bridge_vlan_group
*vg
,
805 struct sk_buff
*skb
);
806 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
808 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
809 void br_vlan_flush(struct net_bridge
*br
);
810 struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
, u16 vid
);
811 void br_recalculate_fwd_mask(struct net_bridge
*br
);
812 int __br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
813 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
814 int __br_vlan_set_proto(struct net_bridge
*br
, __be16 proto
);
815 int br_vlan_set_proto(struct net_bridge
*br
, unsigned long val
);
816 int br_vlan_set_stats(struct net_bridge
*br
, unsigned long val
);
817 int br_vlan_init(struct net_bridge
*br
);
818 int br_vlan_set_default_pvid(struct net_bridge
*br
, unsigned long val
);
819 int __br_vlan_set_default_pvid(struct net_bridge
*br
, u16 pvid
);
820 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
822 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
823 void nbp_vlan_flush(struct net_bridge_port
*port
);
824 int nbp_vlan_init(struct net_bridge_port
*port
);
825 int nbp_get_num_vlan_infos(struct net_bridge_port
*p
, u32 filter_mask
);
826 void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
827 struct br_vlan_stats
*stats
);
829 static inline struct net_bridge_vlan_group
*br_vlan_group(
830 const struct net_bridge
*br
)
832 return rtnl_dereference(br
->vlgrp
);
835 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
836 const struct net_bridge_port
*p
)
838 return rtnl_dereference(p
->vlgrp
);
841 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
842 const struct net_bridge
*br
)
844 return rcu_dereference(br
->vlgrp
);
847 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
848 const struct net_bridge_port
*p
)
850 return rcu_dereference(p
->vlgrp
);
853 /* Since bridge now depends on 8021Q module, but the time bridge sees the
854 * skb, the vlan tag will always be present if the frame was tagged.
856 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
860 if (skb_vlan_tag_present(skb
)) {
861 *vid
= skb_vlan_tag_get(skb
) & VLAN_VID_MASK
;
870 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
880 static inline bool br_allowed_ingress(const struct net_bridge
*br
,
881 struct net_bridge_vlan_group
*vg
,
888 static inline bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
889 const struct sk_buff
*skb
)
894 static inline bool br_should_learn(struct net_bridge_port
*p
,
895 struct sk_buff
*skb
, u16
*vid
)
900 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
901 const struct net_bridge_port
*port
,
902 struct net_bridge_vlan_group
*vg
,
908 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
915 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
920 static inline void br_vlan_flush(struct net_bridge
*br
)
924 static inline void br_recalculate_fwd_mask(struct net_bridge
*br
)
928 static inline int br_vlan_init(struct net_bridge
*br
)
933 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
940 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
945 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
949 static inline struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
,
955 static inline int nbp_vlan_init(struct net_bridge_port
*port
)
960 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
965 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
970 static inline int __br_vlan_filter_toggle(struct net_bridge
*br
,
976 static inline int nbp_get_num_vlan_infos(struct net_bridge_port
*p
,
982 static inline struct net_bridge_vlan_group
*br_vlan_group(
983 const struct net_bridge
*br
)
988 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
989 const struct net_bridge_port
*p
)
994 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
995 const struct net_bridge
*br
)
1000 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
1001 const struct net_bridge_port
*p
)
1006 static inline void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
1007 struct br_vlan_stats
*stats
)
1013 int (*br_dev_xmit_hook
)(struct sk_buff
*skb
);
1015 extern const struct nf_br_ops __rcu
*nf_br_ops
;
1017 /* br_netfilter.c */
1018 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1019 int br_nf_core_init(void);
1020 void br_nf_core_fini(void);
1021 void br_netfilter_rtable_init(struct net_bridge
*);
1023 static inline int br_nf_core_init(void) { return 0; }
1024 static inline void br_nf_core_fini(void) {}
1025 #define br_netfilter_rtable_init(x)
1029 void br_set_state(struct net_bridge_port
*p
, unsigned int state
);
1030 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
1031 void br_init_port(struct net_bridge_port
*p
);
1032 void br_become_designated_port(struct net_bridge_port
*p
);
1034 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
1035 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
1036 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
1037 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
1038 int __set_ageing_time(struct net_device
*dev
, unsigned long t
);
1039 int br_set_ageing_time(struct net_bridge
*br
, clock_t ageing_time
);
1043 void br_stp_enable_bridge(struct net_bridge
*br
);
1044 void br_stp_disable_bridge(struct net_bridge
*br
);
1045 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
1046 void br_stp_enable_port(struct net_bridge_port
*p
);
1047 void br_stp_disable_port(struct net_bridge_port
*p
);
1048 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
1049 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
1050 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
1051 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
1052 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
1053 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
1057 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
1058 struct net_device
*dev
);
1060 /* br_stp_timer.c */
1061 void br_stp_timer_init(struct net_bridge
*br
);
1062 void br_stp_port_timer_init(struct net_bridge_port
*p
);
1063 unsigned long br_timer_value(const struct timer_list
*timer
);
1066 #if IS_ENABLED(CONFIG_ATM_LANE)
1067 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
1071 extern struct rtnl_link_ops br_link_ops
;
1072 int br_netlink_init(void);
1073 void br_netlink_fini(void);
1074 void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
1075 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1076 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1077 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
1078 u32 filter_mask
, int nlflags
);
1082 extern const struct sysfs_ops brport_sysfs_ops
;
1083 int br_sysfs_addif(struct net_bridge_port
*p
);
1084 int br_sysfs_renameif(struct net_bridge_port
*p
);
1087 int br_sysfs_addbr(struct net_device
*dev
);
1088 void br_sysfs_delbr(struct net_device
*dev
);
1092 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
1093 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
1094 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
1095 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
1096 #endif /* CONFIG_SYSFS */
1098 /* br_switchdev.c */
1099 #ifdef CONFIG_NET_SWITCHDEV
1100 int nbp_switchdev_mark_set(struct net_bridge_port
*p
);
1101 void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1102 struct sk_buff
*skb
);
1103 bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1104 const struct sk_buff
*skb
);
1105 int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1106 unsigned long flags
,
1107 unsigned long mask
);
1108 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
,
1111 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1113 skb
->offload_fwd_mark
= 0;
1116 static inline int nbp_switchdev_mark_set(struct net_bridge_port
*p
)
1121 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1122 struct sk_buff
*skb
)
1126 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1127 const struct sk_buff
*skb
)
1132 static inline int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1133 unsigned long flags
,
1140 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
, int type
)
1144 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1147 #endif /* CONFIG_NET_SWITCHDEV */
1149 /* br_arp_nd_proxy.c */
1150 void br_recalculate_neigh_suppress_enabled(struct net_bridge
*br
);
1151 void br_do_proxy_suppress_arp(struct sk_buff
*skb
, struct net_bridge
*br
,
1152 u16 vid
, struct net_bridge_port
*p
);
1153 void br_do_suppress_nd(struct sk_buff
*skb
, struct net_bridge
*br
,
1154 u16 vid
, struct net_bridge_port
*p
, struct nd_msg
*msg
);
1155 struct nd_msg
*br_is_nd_neigh_msg(struct sk_buff
*skb
, struct nd_msg
*m
);