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>
25 #define BR_HASH_BITS 8
26 #define BR_HASH_SIZE (1 << BR_HASH_BITS)
28 #define BR_HOLD_TIME (1*HZ)
30 #define BR_PORT_BITS 10
31 #define BR_MAX_PORTS (1<<BR_PORT_BITS)
33 #define BR_VERSION "2.3"
35 /* Control of forwarding link local multicast */
36 #define BR_GROUPFWD_DEFAULT 0
37 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
38 #define BR_GROUPFWD_RESTRICTED 0x0007u
39 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
40 #define BR_GROUPFWD_8021AD 0xB801u
42 /* Path to usermode spanning tree program */
43 #define BR_STP_PROG "/sbin/bridge-stp"
45 typedef struct bridge_id bridge_id
;
46 typedef struct mac_addr mac_addr
;
47 typedef __u16 port_id
;
51 unsigned char prio
[2];
52 unsigned char addr
[ETH_ALEN
];
57 unsigned char addr
[ETH_ALEN
];
60 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
62 struct bridge_mcast_own_query
{
63 struct timer_list timer
;
68 struct bridge_mcast_other_query
{
69 struct timer_list timer
;
70 unsigned long delay_time
;
73 /* selected querier */
74 struct bridge_mcast_querier
{
76 struct net_bridge_port __rcu
*port
;
80 struct br_vlan_stats
{
85 struct u64_stats_sync syncp
;
89 * struct net_bridge_vlan - per-vlan entry
91 * @vnode: rhashtable member
93 * @flags: bridge vlan flags
94 * @stats: per-cpu VLAN statistics
95 * @br: if MASTER flag set, this points to a bridge struct
96 * @port: if MASTER flag unset, this points to a port struct
97 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
98 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
100 * @vlist: sorted list of VLAN entries
101 * @rcu: used for entry destruction
103 * This structure is shared between the global per-VLAN entries contained in
104 * the bridge rhashtable and the local per-port per-VLAN entries contained in
105 * the port's rhashtable. The union entries should be interpreted depending on
106 * the entry flags that are set.
108 struct net_bridge_vlan
{
109 struct rhash_head vnode
;
112 struct br_vlan_stats __percpu
*stats
;
114 struct net_bridge
*br
;
115 struct net_bridge_port
*port
;
119 struct net_bridge_vlan
*brvlan
;
121 struct list_head vlist
;
127 * struct net_bridge_vlan_group
129 * @vlan_hash: VLAN entry rhashtable
130 * @vlan_list: sorted VLAN entry list
131 * @num_vlans: number of total VLAN entries
132 * @pvid: PVID VLAN id
134 * IMPORTANT: Be careful when checking if there're VLAN entries using list
135 * primitives because the bridge can have entries in its list which
136 * are just for global context but not for filtering, i.e. they have
137 * the master flag set but not the brentry flag. If you have to check
138 * if there're "real" entries in the bridge please test @num_vlans
140 struct net_bridge_vlan_group
{
141 struct rhashtable vlan_hash
;
142 struct list_head vlan_list
;
147 struct net_bridge_fdb_entry
149 struct hlist_node hlist
;
150 struct net_bridge_port
*dst
;
152 unsigned long updated
;
156 unsigned char is_local
:1,
159 added_by_external_learn
:1;
163 #define MDB_PG_FLAGS_PERMANENT BIT(0)
164 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
166 struct net_bridge_port_group
{
167 struct net_bridge_port
*port
;
168 struct net_bridge_port_group __rcu
*next
;
169 struct hlist_node mglist
;
171 struct timer_list timer
;
176 struct net_bridge_mdb_entry
178 struct hlist_node hlist
[2];
179 struct net_bridge
*br
;
180 struct net_bridge_port_group __rcu
*ports
;
182 struct timer_list timer
;
187 struct net_bridge_mdb_htable
189 struct hlist_head
*mhash
;
191 struct net_bridge_mdb_htable
*old
;
198 struct net_bridge_port
200 struct net_bridge
*br
;
201 struct net_device
*dev
;
202 struct list_head list
;
208 unsigned char topology_change_ack
;
209 unsigned char config_pending
;
211 port_id designated_port
;
212 bridge_id designated_root
;
213 bridge_id designated_bridge
;
216 unsigned long designated_age
;
218 struct timer_list forward_delay_timer
;
219 struct timer_list hold_timer
;
220 struct timer_list message_age_timer
;
226 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
227 struct bridge_mcast_own_query ip4_own_query
;
228 #if IS_ENABLED(CONFIG_IPV6)
229 struct bridge_mcast_own_query ip6_own_query
;
230 #endif /* IS_ENABLED(CONFIG_IPV6) */
231 unsigned char multicast_router
;
232 struct timer_list multicast_router_timer
;
233 struct hlist_head mglist
;
234 struct hlist_node rlist
;
238 char sysfs_name
[IFNAMSIZ
];
241 #ifdef CONFIG_NET_POLL_CONTROLLER
244 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
245 struct net_bridge_vlan_group __rcu
*vlgrp
;
249 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
250 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
252 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
254 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
256 return rcu_dereference(dev
->rx_handler_data
);
259 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
261 return br_port_exists(dev
) ?
262 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
268 struct list_head port_list
;
269 struct net_device
*dev
;
271 struct pcpu_sw_netstats __percpu
*stats
;
272 spinlock_t hash_lock
;
273 struct hlist_head hash
[BR_HASH_SIZE
];
274 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
276 struct rtable fake_rtable
;
277 struct rt6_info fake_rt6_info
;
279 bool nf_call_iptables
;
280 bool nf_call_ip6tables
;
281 bool nf_call_arptables
;
284 u16 group_fwd_mask_required
;
287 bridge_id designated_root
;
290 unsigned long max_age
;
291 unsigned long hello_time
;
292 unsigned long forward_delay
;
293 unsigned long bridge_max_age
;
294 unsigned long ageing_time
;
295 unsigned long bridge_hello_time
;
296 unsigned long bridge_forward_delay
;
298 u8 group_addr
[ETH_ALEN
];
303 BR_NO_STP
, /* no spanning tree */
304 BR_KERNEL_STP
, /* old STP in kernel */
305 BR_USER_STP
, /* new RSTP in userspace */
308 unsigned char topology_change
;
309 unsigned char topology_change_detected
;
311 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
312 unsigned char multicast_router
;
314 u8 multicast_disabled
:1;
315 u8 multicast_querier
:1;
316 u8 multicast_query_use_ifaddr
:1;
322 u32 multicast_last_member_count
;
323 u32 multicast_startup_query_count
;
325 unsigned long multicast_last_member_interval
;
326 unsigned long multicast_membership_interval
;
327 unsigned long multicast_querier_interval
;
328 unsigned long multicast_query_interval
;
329 unsigned long multicast_query_response_interval
;
330 unsigned long multicast_startup_query_interval
;
332 spinlock_t multicast_lock
;
333 struct net_bridge_mdb_htable __rcu
*mdb
;
334 struct hlist_head router_list
;
336 struct timer_list multicast_router_timer
;
337 struct bridge_mcast_other_query ip4_other_query
;
338 struct bridge_mcast_own_query ip4_own_query
;
339 struct bridge_mcast_querier ip4_querier
;
340 #if IS_ENABLED(CONFIG_IPV6)
341 struct bridge_mcast_other_query ip6_other_query
;
342 struct bridge_mcast_own_query ip6_own_query
;
343 struct bridge_mcast_querier ip6_querier
;
344 #endif /* IS_ENABLED(CONFIG_IPV6) */
347 struct timer_list hello_timer
;
348 struct timer_list tcn_timer
;
349 struct timer_list topology_change_timer
;
350 struct timer_list gc_timer
;
351 struct kobject
*ifobj
;
353 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
354 struct net_bridge_vlan_group __rcu
*vlgrp
;
356 u8 vlan_stats_enabled
;
362 struct br_input_skb_cb
{
363 struct net_device
*brdev
;
365 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
370 bool proxyarp_replied
;
372 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
377 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
379 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
380 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
382 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
385 #define br_printk(level, br, format, args...) \
386 printk(level "%s: " format, (br)->dev->name, ##args)
388 #define br_err(__br, format, args...) \
389 br_printk(KERN_ERR, __br, format, ##args)
390 #define br_warn(__br, format, args...) \
391 br_printk(KERN_WARNING, __br, format, ##args)
392 #define br_notice(__br, format, args...) \
393 br_printk(KERN_NOTICE, __br, format, ##args)
394 #define br_info(__br, format, args...) \
395 br_printk(KERN_INFO, __br, format, ##args)
397 #define br_debug(br, format, args...) \
398 pr_debug("%s: " format, (br)->dev->name, ##args)
400 /* called under bridge lock */
401 static inline int br_is_root_bridge(const struct net_bridge
*br
)
403 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
406 /* check if a VLAN entry is global */
407 static inline bool br_vlan_is_master(const struct net_bridge_vlan
*v
)
409 return v
->flags
& BRIDGE_VLAN_INFO_MASTER
;
412 /* check if a VLAN entry is used by the bridge */
413 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan
*v
)
415 return v
->flags
& BRIDGE_VLAN_INFO_BRENTRY
;
418 /* check if we should use the vlan entry, returns false if it's only context */
419 static inline bool br_vlan_should_use(const struct net_bridge_vlan
*v
)
421 if (br_vlan_is_master(v
)) {
422 if (br_vlan_is_brentry(v
))
432 void br_dev_setup(struct net_device
*dev
);
433 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
434 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
435 #ifdef CONFIG_NET_POLL_CONTROLLER
436 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
439 struct netpoll
*np
= p
->np
;
442 netpoll_send_skb(np
, skb
);
445 int br_netpoll_enable(struct net_bridge_port
*p
);
446 void br_netpoll_disable(struct net_bridge_port
*p
);
448 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
453 static inline int br_netpoll_enable(struct net_bridge_port
*p
)
458 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
464 int br_fdb_init(void);
465 void br_fdb_fini(void);
466 void br_fdb_flush(struct net_bridge
*br
);
467 void br_fdb_find_delete_local(struct net_bridge
*br
,
468 const struct net_bridge_port
*p
,
469 const unsigned char *addr
, u16 vid
);
470 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
471 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
472 void br_fdb_cleanup(unsigned long arg
);
473 void br_fdb_delete_by_port(struct net_bridge
*br
,
474 const struct net_bridge_port
*p
, u16 vid
, int do_all
);
475 struct net_bridge_fdb_entry
*__br_fdb_get(struct net_bridge
*br
,
476 const unsigned char *addr
, __u16 vid
);
477 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
478 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
480 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
481 const unsigned char *addr
, u16 vid
);
482 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
483 const unsigned char *addr
, u16 vid
, bool added_by_user
);
485 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
486 struct net_device
*dev
, const unsigned char *addr
, u16 vid
);
487 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
488 const unsigned char *addr
, u16 vid
, u16 nlh_flags
);
489 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
490 struct net_device
*dev
, struct net_device
*fdev
, int idx
);
491 int br_fdb_sync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
492 void br_fdb_unsync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
493 int br_fdb_external_learn_add(struct net_bridge
*br
, struct net_bridge_port
*p
,
494 const unsigned char *addr
, u16 vid
);
495 int br_fdb_external_learn_del(struct net_bridge
*br
, struct net_bridge_port
*p
,
496 const unsigned char *addr
, u16 vid
);
499 void br_deliver(const struct net_bridge_port
*to
, struct sk_buff
*skb
);
500 int br_dev_queue_push_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
501 void br_forward(const struct net_bridge_port
*to
,
502 struct sk_buff
*skb
, struct sk_buff
*skb0
);
503 int br_forward_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
504 void br_flood_deliver(struct net_bridge
*br
, struct sk_buff
*skb
, bool unicast
);
505 void br_flood_forward(struct net_bridge
*br
, struct sk_buff
*skb
,
506 struct sk_buff
*skb2
, bool unicast
);
509 void br_port_carrier_check(struct net_bridge_port
*p
);
510 int br_add_bridge(struct net
*net
, const char *name
);
511 int br_del_bridge(struct net
*net
, const char *name
);
512 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
);
513 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
514 int br_min_mtu(const struct net_bridge
*br
);
515 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
516 netdev_features_t features
);
517 void br_port_flags_change(struct net_bridge_port
*port
, unsigned long mask
);
518 void br_manage_promisc(struct net_bridge
*br
);
521 int br_handle_frame_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
522 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
524 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
526 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
529 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
531 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
535 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
536 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
540 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
541 extern unsigned int br_mdb_rehash_seq
;
542 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
543 struct sk_buff
*skb
, u16 vid
);
544 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
545 struct sk_buff
*skb
, u16 vid
);
546 void br_multicast_add_port(struct net_bridge_port
*port
);
547 void br_multicast_del_port(struct net_bridge_port
*port
);
548 void br_multicast_enable_port(struct net_bridge_port
*port
);
549 void br_multicast_disable_port(struct net_bridge_port
*port
);
550 void br_multicast_init(struct net_bridge
*br
);
551 void br_multicast_open(struct net_bridge
*br
);
552 void br_multicast_stop(struct net_bridge
*br
);
553 void br_multicast_dev_del(struct net_bridge
*br
);
554 void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
555 struct sk_buff
*skb
);
556 void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
557 struct sk_buff
*skb
, struct sk_buff
*skb2
);
558 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
559 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
560 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
561 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
562 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
563 struct net_bridge_mdb_entry
*
564 br_mdb_ip_get(struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
);
565 struct net_bridge_mdb_entry
*
566 br_multicast_new_group(struct net_bridge
*br
, struct net_bridge_port
*port
,
567 struct br_ip
*group
);
568 void br_multicast_free_pg(struct rcu_head
*head
);
569 struct net_bridge_port_group
*
570 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
571 struct net_bridge_port_group __rcu
*next
,
572 unsigned char flags
);
573 void br_mdb_init(void);
574 void br_mdb_uninit(void);
575 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
576 struct br_ip
*group
, int type
, u8 flags
);
577 void br_rtr_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
580 #define mlock_dereference(X, br) \
581 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
583 static inline bool br_multicast_is_router(struct net_bridge
*br
)
585 return br
->multicast_router
== 2 ||
586 (br
->multicast_router
== 1 &&
587 timer_pending(&br
->multicast_router_timer
));
591 __br_multicast_querier_exists(struct net_bridge
*br
,
592 struct bridge_mcast_other_query
*querier
,
595 bool own_querier_enabled
;
597 if (br
->multicast_querier
) {
598 if (is_ipv6
&& !br
->has_ipv6_addr
)
599 own_querier_enabled
= false;
601 own_querier_enabled
= true;
603 own_querier_enabled
= false;
606 return time_is_before_jiffies(querier
->delay_time
) &&
607 (own_querier_enabled
|| timer_pending(&querier
->timer
));
610 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
613 switch (eth
->h_proto
) {
614 case (htons(ETH_P_IP
)):
615 return __br_multicast_querier_exists(br
,
616 &br
->ip4_other_query
, false);
617 #if IS_ENABLED(CONFIG_IPV6)
618 case (htons(ETH_P_IPV6
)):
619 return __br_multicast_querier_exists(br
,
620 &br
->ip6_other_query
, true);
627 static inline int br_multicast_rcv(struct net_bridge
*br
,
628 struct net_bridge_port
*port
,
635 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
636 struct sk_buff
*skb
, u16 vid
)
641 static inline void br_multicast_add_port(struct net_bridge_port
*port
)
645 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
649 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
653 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
657 static inline void br_multicast_init(struct net_bridge
*br
)
661 static inline void br_multicast_open(struct net_bridge
*br
)
665 static inline void br_multicast_stop(struct net_bridge
*br
)
669 static inline void br_multicast_dev_del(struct net_bridge
*br
)
673 static inline void br_multicast_deliver(struct net_bridge_mdb_entry
*mdst
,
678 static inline void br_multicast_forward(struct net_bridge_mdb_entry
*mdst
,
680 struct sk_buff
*skb2
)
683 static inline bool br_multicast_is_router(struct net_bridge
*br
)
687 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
692 static inline void br_mdb_init(void)
695 static inline void br_mdb_uninit(void)
701 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
702 bool br_allowed_ingress(const struct net_bridge
*br
,
703 struct net_bridge_vlan_group
*vg
, struct sk_buff
*skb
,
705 bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
706 const struct sk_buff
*skb
);
707 bool br_should_learn(struct net_bridge_port
*p
, struct sk_buff
*skb
, u16
*vid
);
708 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
709 struct net_bridge_vlan_group
*vg
,
710 struct sk_buff
*skb
);
711 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
);
712 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
713 void br_vlan_flush(struct net_bridge
*br
);
714 struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
, u16 vid
);
715 void br_recalculate_fwd_mask(struct net_bridge
*br
);
716 int __br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
717 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
718 int __br_vlan_set_proto(struct net_bridge
*br
, __be16 proto
);
719 int br_vlan_set_proto(struct net_bridge
*br
, unsigned long val
);
720 int br_vlan_set_stats(struct net_bridge
*br
, unsigned long val
);
721 int br_vlan_init(struct net_bridge
*br
);
722 int br_vlan_set_default_pvid(struct net_bridge
*br
, unsigned long val
);
723 int __br_vlan_set_default_pvid(struct net_bridge
*br
, u16 pvid
);
724 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
);
725 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
726 void nbp_vlan_flush(struct net_bridge_port
*port
);
727 int nbp_vlan_init(struct net_bridge_port
*port
);
728 int nbp_get_num_vlan_infos(struct net_bridge_port
*p
, u32 filter_mask
);
729 void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
730 struct br_vlan_stats
*stats
);
732 static inline struct net_bridge_vlan_group
*br_vlan_group(
733 const struct net_bridge
*br
)
735 return rtnl_dereference(br
->vlgrp
);
738 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
739 const struct net_bridge_port
*p
)
741 return rtnl_dereference(p
->vlgrp
);
744 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
745 const struct net_bridge
*br
)
747 return rcu_dereference(br
->vlgrp
);
750 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
751 const struct net_bridge_port
*p
)
753 return rcu_dereference(p
->vlgrp
);
756 /* Since bridge now depends on 8021Q module, but the time bridge sees the
757 * skb, the vlan tag will always be present if the frame was tagged.
759 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
763 if (skb_vlan_tag_present(skb
)) {
764 *vid
= skb_vlan_tag_get(skb
) & VLAN_VID_MASK
;
773 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
782 static inline int br_vlan_enabled(struct net_bridge
*br
)
784 return br
->vlan_enabled
;
787 static inline bool br_allowed_ingress(const struct net_bridge
*br
,
788 struct net_bridge_vlan_group
*vg
,
795 static inline bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
796 const struct sk_buff
*skb
)
801 static inline bool br_should_learn(struct net_bridge_port
*p
,
802 struct sk_buff
*skb
, u16
*vid
)
807 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
808 struct net_bridge_vlan_group
*vg
,
814 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
)
819 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
824 static inline void br_vlan_flush(struct net_bridge
*br
)
828 static inline void br_recalculate_fwd_mask(struct net_bridge
*br
)
832 static inline int br_vlan_init(struct net_bridge
*br
)
837 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
)
842 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
847 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
851 static inline struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
,
857 static inline int nbp_vlan_init(struct net_bridge_port
*port
)
862 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
867 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
872 static inline int br_vlan_enabled(struct net_bridge
*br
)
877 static inline int __br_vlan_filter_toggle(struct net_bridge
*br
,
883 static inline int nbp_get_num_vlan_infos(struct net_bridge_port
*p
,
889 static inline struct net_bridge_vlan_group
*br_vlan_group(
890 const struct net_bridge
*br
)
895 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
896 const struct net_bridge_port
*p
)
901 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
902 const struct net_bridge
*br
)
907 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
908 const struct net_bridge_port
*p
)
913 static inline void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
914 struct br_vlan_stats
*stats
)
920 int (*br_dev_xmit_hook
)(struct sk_buff
*skb
);
922 extern const struct nf_br_ops __rcu
*nf_br_ops
;
925 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
926 int br_nf_core_init(void);
927 void br_nf_core_fini(void);
928 void br_netfilter_rtable_init(struct net_bridge
*);
930 static inline int br_nf_core_init(void) { return 0; }
931 static inline void br_nf_core_fini(void) {}
932 #define br_netfilter_rtable_init(x)
936 void br_set_state(struct net_bridge_port
*p
, unsigned int state
);
937 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
938 void br_init_port(struct net_bridge_port
*p
);
939 void br_become_designated_port(struct net_bridge_port
*p
);
941 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
942 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
943 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
944 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
945 int br_set_ageing_time(struct net_bridge
*br
, u32 ageing_time
);
949 void br_stp_enable_bridge(struct net_bridge
*br
);
950 void br_stp_disable_bridge(struct net_bridge
*br
);
951 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
952 void br_stp_enable_port(struct net_bridge_port
*p
);
953 void br_stp_disable_port(struct net_bridge_port
*p
);
954 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
955 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
956 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
957 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
958 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
959 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
963 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
964 struct net_device
*dev
);
967 void br_stp_timer_init(struct net_bridge
*br
);
968 void br_stp_port_timer_init(struct net_bridge_port
*p
);
969 unsigned long br_timer_value(const struct timer_list
*timer
);
972 #if IS_ENABLED(CONFIG_ATM_LANE)
973 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
977 extern struct rtnl_link_ops br_link_ops
;
978 int br_netlink_init(void);
979 void br_netlink_fini(void);
980 void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
981 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
982 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
983 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
984 u32 filter_mask
, int nlflags
);
988 extern const struct sysfs_ops brport_sysfs_ops
;
989 int br_sysfs_addif(struct net_bridge_port
*p
);
990 int br_sysfs_renameif(struct net_bridge_port
*p
);
993 int br_sysfs_addbr(struct net_device
*dev
);
994 void br_sysfs_delbr(struct net_device
*dev
);
998 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
999 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
1000 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
1001 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
1002 #endif /* CONFIG_SYSFS */