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
;
79 /* IGMP/MLD statistics */
80 struct bridge_mcast_stats
{
81 struct br_mcast_stats mstats
;
82 struct u64_stats_sync syncp
;
86 struct br_vlan_stats
{
91 struct u64_stats_sync syncp
;
94 struct br_tunnel_info
{
96 struct metadata_dst
*tunnel_dst
;
100 * struct net_bridge_vlan - per-vlan entry
102 * @vnode: rhashtable member
104 * @flags: bridge vlan flags
105 * @stats: per-cpu VLAN statistics
106 * @br: if MASTER flag set, this points to a bridge struct
107 * @port: if MASTER flag unset, this points to a port struct
108 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
109 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
110 * for this VLAN entry
111 * @vlist: sorted list of VLAN entries
112 * @rcu: used for entry destruction
114 * This structure is shared between the global per-VLAN entries contained in
115 * the bridge rhashtable and the local per-port per-VLAN entries contained in
116 * the port's rhashtable. The union entries should be interpreted depending on
117 * the entry flags that are set.
119 struct net_bridge_vlan
{
120 struct rhash_head vnode
;
121 struct rhash_head tnode
;
124 struct br_vlan_stats __percpu
*stats
;
126 struct net_bridge
*br
;
127 struct net_bridge_port
*port
;
131 struct net_bridge_vlan
*brvlan
;
134 struct br_tunnel_info tinfo
;
136 struct list_head vlist
;
142 * struct net_bridge_vlan_group
144 * @vlan_hash: VLAN entry rhashtable
145 * @vlan_list: sorted VLAN entry list
146 * @num_vlans: number of total VLAN entries
147 * @pvid: PVID VLAN id
149 * IMPORTANT: Be careful when checking if there're VLAN entries using list
150 * primitives because the bridge can have entries in its list which
151 * are just for global context but not for filtering, i.e. they have
152 * the master flag set but not the brentry flag. If you have to check
153 * if there're "real" entries in the bridge please test @num_vlans
155 struct net_bridge_vlan_group
{
156 struct rhashtable vlan_hash
;
157 struct rhashtable tunnel_hash
;
158 struct list_head vlan_list
;
163 struct net_bridge_fdb_entry
{
164 struct hlist_node hlist
;
165 struct net_bridge_port
*dst
;
169 unsigned char is_local
:1,
172 added_by_external_learn
:1;
174 /* write-heavy members should not affect lookups */
175 unsigned long updated ____cacheline_aligned_in_smp
;
181 #define MDB_PG_FLAGS_PERMANENT BIT(0)
182 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
184 struct net_bridge_port_group
{
185 struct net_bridge_port
*port
;
186 struct net_bridge_port_group __rcu
*next
;
187 struct hlist_node mglist
;
189 struct timer_list timer
;
192 unsigned char eth_addr
[ETH_ALEN
];
195 struct net_bridge_mdb_entry
197 struct hlist_node hlist
[2];
198 struct net_bridge
*br
;
199 struct net_bridge_port_group __rcu
*ports
;
201 struct timer_list timer
;
206 struct net_bridge_mdb_htable
208 struct hlist_head
*mhash
;
210 struct net_bridge_mdb_htable
*old
;
217 struct net_bridge_port
{
218 struct net_bridge
*br
;
219 struct net_device
*dev
;
220 struct list_head list
;
223 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
224 struct net_bridge_vlan_group __rcu
*vlgrp
;
231 unsigned char topology_change_ack
;
232 unsigned char config_pending
;
234 port_id designated_port
;
235 bridge_id designated_root
;
236 bridge_id designated_bridge
;
239 unsigned long designated_age
;
241 struct timer_list forward_delay_timer
;
242 struct timer_list hold_timer
;
243 struct timer_list message_age_timer
;
247 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
248 struct bridge_mcast_own_query ip4_own_query
;
249 #if IS_ENABLED(CONFIG_IPV6)
250 struct bridge_mcast_own_query ip6_own_query
;
251 #endif /* IS_ENABLED(CONFIG_IPV6) */
252 unsigned char multicast_router
;
253 struct bridge_mcast_stats __percpu
*mcast_stats
;
254 struct timer_list multicast_router_timer
;
255 struct hlist_head mglist
;
256 struct hlist_node rlist
;
260 char sysfs_name
[IFNAMSIZ
];
263 #ifdef CONFIG_NET_POLL_CONTROLLER
266 #ifdef CONFIG_NET_SWITCHDEV
267 int offload_fwd_mark
;
271 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
272 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
274 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
276 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
278 return rcu_dereference(dev
->rx_handler_data
);
281 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
283 return br_port_exists(dev
) ?
284 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
289 spinlock_t hash_lock
;
290 struct list_head port_list
;
291 struct net_device
*dev
;
292 struct pcpu_sw_netstats __percpu
*stats
;
293 /* These fields are accessed on each packet */
294 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
296 u8 vlan_stats_enabled
;
299 struct net_bridge_vlan_group __rcu
*vlgrp
;
302 struct hlist_head hash
[BR_HASH_SIZE
];
303 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
305 struct rtable fake_rtable
;
306 struct rt6_info fake_rt6_info
;
308 bool nf_call_iptables
;
309 bool nf_call_ip6tables
;
310 bool nf_call_arptables
;
313 u16 group_fwd_mask_required
;
316 bridge_id designated_root
;
319 unsigned char topology_change
;
320 unsigned char topology_change_detected
;
322 unsigned long max_age
;
323 unsigned long hello_time
;
324 unsigned long forward_delay
;
325 unsigned long ageing_time
;
326 unsigned long bridge_max_age
;
327 unsigned long bridge_hello_time
;
328 unsigned long bridge_forward_delay
;
329 unsigned long bridge_ageing_time
;
331 u8 group_addr
[ETH_ALEN
];
335 BR_NO_STP
, /* no spanning tree */
336 BR_KERNEL_STP
, /* old STP in kernel */
337 BR_USER_STP
, /* new RSTP in userspace */
340 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
341 unsigned char multicast_router
;
343 u8 multicast_disabled
:1;
344 u8 multicast_querier
:1;
345 u8 multicast_query_use_ifaddr
:1;
347 u8 multicast_stats_enabled
:1;
352 u32 multicast_last_member_count
;
353 u32 multicast_startup_query_count
;
355 u8 multicast_igmp_version
;
357 unsigned long multicast_last_member_interval
;
358 unsigned long multicast_membership_interval
;
359 unsigned long multicast_querier_interval
;
360 unsigned long multicast_query_interval
;
361 unsigned long multicast_query_response_interval
;
362 unsigned long multicast_startup_query_interval
;
364 spinlock_t multicast_lock
;
365 struct net_bridge_mdb_htable __rcu
*mdb
;
366 struct hlist_head router_list
;
368 struct timer_list multicast_router_timer
;
369 struct bridge_mcast_other_query ip4_other_query
;
370 struct bridge_mcast_own_query ip4_own_query
;
371 struct bridge_mcast_querier ip4_querier
;
372 struct bridge_mcast_stats __percpu
*mcast_stats
;
373 #if IS_ENABLED(CONFIG_IPV6)
374 struct bridge_mcast_other_query ip6_other_query
;
375 struct bridge_mcast_own_query ip6_own_query
;
376 struct bridge_mcast_querier ip6_querier
;
377 u8 multicast_mld_version
;
378 #endif /* IS_ENABLED(CONFIG_IPV6) */
381 struct timer_list hello_timer
;
382 struct timer_list tcn_timer
;
383 struct timer_list topology_change_timer
;
384 struct delayed_work gc_work
;
385 struct kobject
*ifobj
;
388 #ifdef CONFIG_NET_SWITCHDEV
389 int offload_fwd_mark
;
393 struct br_input_skb_cb
{
394 struct net_device
*brdev
;
396 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
401 bool proxyarp_replied
;
403 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
407 #ifdef CONFIG_NET_SWITCHDEV
408 int offload_fwd_mark
;
412 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
414 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
415 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
417 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
420 #define br_printk(level, br, format, args...) \
421 printk(level "%s: " format, (br)->dev->name, ##args)
423 #define br_err(__br, format, args...) \
424 br_printk(KERN_ERR, __br, format, ##args)
425 #define br_warn(__br, format, args...) \
426 br_printk(KERN_WARNING, __br, format, ##args)
427 #define br_notice(__br, format, args...) \
428 br_printk(KERN_NOTICE, __br, format, ##args)
429 #define br_info(__br, format, args...) \
430 br_printk(KERN_INFO, __br, format, ##args)
432 #define br_debug(br, format, args...) \
433 pr_debug("%s: " format, (br)->dev->name, ##args)
435 /* called under bridge lock */
436 static inline int br_is_root_bridge(const struct net_bridge
*br
)
438 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
441 /* check if a VLAN entry is global */
442 static inline bool br_vlan_is_master(const struct net_bridge_vlan
*v
)
444 return v
->flags
& BRIDGE_VLAN_INFO_MASTER
;
447 /* check if a VLAN entry is used by the bridge */
448 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan
*v
)
450 return v
->flags
& BRIDGE_VLAN_INFO_BRENTRY
;
453 /* check if we should use the vlan entry, returns false if it's only context */
454 static inline bool br_vlan_should_use(const struct net_bridge_vlan
*v
)
456 if (br_vlan_is_master(v
)) {
457 if (br_vlan_is_brentry(v
))
467 void br_dev_setup(struct net_device
*dev
);
468 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
469 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
470 #ifdef CONFIG_NET_POLL_CONTROLLER
471 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
474 struct netpoll
*np
= p
->np
;
477 netpoll_send_skb(np
, skb
);
480 int br_netpoll_enable(struct net_bridge_port
*p
);
481 void br_netpoll_disable(struct net_bridge_port
*p
);
483 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
488 static inline int br_netpoll_enable(struct net_bridge_port
*p
)
493 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
499 int br_fdb_init(void);
500 void br_fdb_fini(void);
501 void br_fdb_flush(struct net_bridge
*br
);
502 void br_fdb_find_delete_local(struct net_bridge
*br
,
503 const struct net_bridge_port
*p
,
504 const unsigned char *addr
, u16 vid
);
505 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
506 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
507 void br_fdb_cleanup(struct work_struct
*work
);
508 void br_fdb_delete_by_port(struct net_bridge
*br
,
509 const struct net_bridge_port
*p
, u16 vid
, int do_all
);
510 struct net_bridge_fdb_entry
*br_fdb_find_rcu(struct net_bridge
*br
,
511 const unsigned char *addr
,
513 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
514 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
516 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
517 const unsigned char *addr
, u16 vid
);
518 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
519 const unsigned char *addr
, u16 vid
, bool added_by_user
);
521 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
522 struct net_device
*dev
, const unsigned char *addr
, u16 vid
);
523 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
524 const unsigned char *addr
, u16 vid
, u16 nlh_flags
);
525 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
526 struct net_device
*dev
, struct net_device
*fdev
, int *idx
);
527 int br_fdb_sync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
528 void br_fdb_unsync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
529 int br_fdb_external_learn_add(struct net_bridge
*br
, struct net_bridge_port
*p
,
530 const unsigned char *addr
, u16 vid
);
531 int br_fdb_external_learn_del(struct net_bridge
*br
, struct net_bridge_port
*p
,
532 const unsigned char *addr
, u16 vid
);
540 int br_dev_queue_push_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
541 void br_forward(const struct net_bridge_port
*to
, struct sk_buff
*skb
,
542 bool local_rcv
, bool local_orig
);
543 int br_forward_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
544 void br_flood(struct net_bridge
*br
, struct sk_buff
*skb
,
545 enum br_pkt_type pkt_type
, bool local_rcv
, bool local_orig
);
548 void br_port_carrier_check(struct net_bridge_port
*p
);
549 int br_add_bridge(struct net
*net
, const char *name
);
550 int br_del_bridge(struct net
*net
, const char *name
);
551 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
);
552 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
553 int br_min_mtu(const struct net_bridge
*br
);
554 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
555 netdev_features_t features
);
556 void br_port_flags_change(struct net_bridge_port
*port
, unsigned long mask
);
557 void br_manage_promisc(struct net_bridge
*br
);
560 int br_handle_frame_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
561 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
563 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
565 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
568 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
570 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
574 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
575 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
579 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
580 extern unsigned int br_mdb_rehash_seq
;
581 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
582 struct sk_buff
*skb
, u16 vid
);
583 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
584 struct sk_buff
*skb
, u16 vid
);
585 int br_multicast_add_port(struct net_bridge_port
*port
);
586 void br_multicast_del_port(struct net_bridge_port
*port
);
587 void br_multicast_enable_port(struct net_bridge_port
*port
);
588 void br_multicast_disable_port(struct net_bridge_port
*port
);
589 void br_multicast_init(struct net_bridge
*br
);
590 void br_multicast_open(struct net_bridge
*br
);
591 void br_multicast_stop(struct net_bridge
*br
);
592 void br_multicast_dev_del(struct net_bridge
*br
);
593 void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
594 struct sk_buff
*skb
, bool local_rcv
, bool local_orig
);
595 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
596 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
597 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
598 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
599 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
600 int br_multicast_set_igmp_version(struct net_bridge
*br
, unsigned long val
);
601 #if IS_ENABLED(CONFIG_IPV6)
602 int br_multicast_set_mld_version(struct net_bridge
*br
, unsigned long val
);
604 struct net_bridge_mdb_entry
*
605 br_mdb_ip_get(struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
);
606 struct net_bridge_mdb_entry
*
607 br_multicast_new_group(struct net_bridge
*br
, struct net_bridge_port
*port
,
608 struct br_ip
*group
);
609 void br_multicast_free_pg(struct rcu_head
*head
);
610 struct net_bridge_port_group
*
611 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
612 struct net_bridge_port_group __rcu
*next
,
613 unsigned char flags
, const unsigned char *src
);
614 void br_mdb_init(void);
615 void br_mdb_uninit(void);
616 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
617 struct br_ip
*group
, int type
, u8 flags
);
618 void br_rtr_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
620 void br_multicast_count(struct net_bridge
*br
, const struct net_bridge_port
*p
,
621 const struct sk_buff
*skb
, u8 type
, u8 dir
);
622 int br_multicast_init_stats(struct net_bridge
*br
);
623 void br_multicast_uninit_stats(struct net_bridge
*br
);
624 void br_multicast_get_stats(const struct net_bridge
*br
,
625 const struct net_bridge_port
*p
,
626 struct br_mcast_stats
*dest
);
628 #define mlock_dereference(X, br) \
629 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
631 static inline bool br_multicast_is_router(struct net_bridge
*br
)
633 return br
->multicast_router
== 2 ||
634 (br
->multicast_router
== 1 &&
635 timer_pending(&br
->multicast_router_timer
));
639 __br_multicast_querier_exists(struct net_bridge
*br
,
640 struct bridge_mcast_other_query
*querier
,
643 bool own_querier_enabled
;
645 if (br
->multicast_querier
) {
646 if (is_ipv6
&& !br
->has_ipv6_addr
)
647 own_querier_enabled
= false;
649 own_querier_enabled
= true;
651 own_querier_enabled
= false;
654 return time_is_before_jiffies(querier
->delay_time
) &&
655 (own_querier_enabled
|| timer_pending(&querier
->timer
));
658 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
661 switch (eth
->h_proto
) {
662 case (htons(ETH_P_IP
)):
663 return __br_multicast_querier_exists(br
,
664 &br
->ip4_other_query
, false);
665 #if IS_ENABLED(CONFIG_IPV6)
666 case (htons(ETH_P_IPV6
)):
667 return __br_multicast_querier_exists(br
,
668 &br
->ip6_other_query
, true);
675 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
677 return BR_INPUT_SKB_CB(skb
)->igmp
;
680 static inline int br_multicast_rcv(struct net_bridge
*br
,
681 struct net_bridge_port
*port
,
688 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
689 struct sk_buff
*skb
, u16 vid
)
694 static inline int br_multicast_add_port(struct net_bridge_port
*port
)
699 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
703 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
707 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
711 static inline void br_multicast_init(struct net_bridge
*br
)
715 static inline void br_multicast_open(struct net_bridge
*br
)
719 static inline void br_multicast_stop(struct net_bridge
*br
)
723 static inline void br_multicast_dev_del(struct net_bridge
*br
)
727 static inline void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
729 bool local_rcv
, bool local_orig
)
733 static inline bool br_multicast_is_router(struct net_bridge
*br
)
738 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
744 static inline void br_mdb_init(void)
748 static inline void br_mdb_uninit(void)
752 static inline void br_multicast_count(struct net_bridge
*br
,
753 const struct net_bridge_port
*p
,
754 const struct sk_buff
*skb
,
759 static inline int br_multicast_init_stats(struct net_bridge
*br
)
764 static inline void br_multicast_uninit_stats(struct net_bridge
*br
)
768 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
775 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
776 bool br_allowed_ingress(const struct net_bridge
*br
,
777 struct net_bridge_vlan_group
*vg
, struct sk_buff
*skb
,
779 bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
780 const struct sk_buff
*skb
);
781 bool br_should_learn(struct net_bridge_port
*p
, struct sk_buff
*skb
, u16
*vid
);
782 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
783 const struct net_bridge_port
*port
,
784 struct net_bridge_vlan_group
*vg
,
785 struct sk_buff
*skb
);
786 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
);
787 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
788 void br_vlan_flush(struct net_bridge
*br
);
789 struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
, u16 vid
);
790 void br_recalculate_fwd_mask(struct net_bridge
*br
);
791 int __br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
792 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
793 int __br_vlan_set_proto(struct net_bridge
*br
, __be16 proto
);
794 int br_vlan_set_proto(struct net_bridge
*br
, unsigned long val
);
795 int br_vlan_set_stats(struct net_bridge
*br
, unsigned long val
);
796 int br_vlan_init(struct net_bridge
*br
);
797 int br_vlan_set_default_pvid(struct net_bridge
*br
, unsigned long val
);
798 int __br_vlan_set_default_pvid(struct net_bridge
*br
, u16 pvid
);
799 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
);
800 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
801 void nbp_vlan_flush(struct net_bridge_port
*port
);
802 int nbp_vlan_init(struct net_bridge_port
*port
);
803 int nbp_get_num_vlan_infos(struct net_bridge_port
*p
, u32 filter_mask
);
804 void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
805 struct br_vlan_stats
*stats
);
807 static inline struct net_bridge_vlan_group
*br_vlan_group(
808 const struct net_bridge
*br
)
810 return rtnl_dereference(br
->vlgrp
);
813 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
814 const struct net_bridge_port
*p
)
816 return rtnl_dereference(p
->vlgrp
);
819 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
820 const struct net_bridge
*br
)
822 return rcu_dereference(br
->vlgrp
);
825 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
826 const struct net_bridge_port
*p
)
828 return rcu_dereference(p
->vlgrp
);
831 /* Since bridge now depends on 8021Q module, but the time bridge sees the
832 * skb, the vlan tag will always be present if the frame was tagged.
834 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
838 if (skb_vlan_tag_present(skb
)) {
839 *vid
= skb_vlan_tag_get(skb
) & VLAN_VID_MASK
;
848 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
857 static inline int br_vlan_enabled(struct net_bridge
*br
)
859 return br
->vlan_enabled
;
862 static inline bool br_allowed_ingress(const struct net_bridge
*br
,
863 struct net_bridge_vlan_group
*vg
,
870 static inline bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
871 const struct sk_buff
*skb
)
876 static inline bool br_should_learn(struct net_bridge_port
*p
,
877 struct sk_buff
*skb
, u16
*vid
)
882 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
883 const struct net_bridge_port
*port
,
884 struct net_bridge_vlan_group
*vg
,
890 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
)
895 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
900 static inline void br_vlan_flush(struct net_bridge
*br
)
904 static inline void br_recalculate_fwd_mask(struct net_bridge
*br
)
908 static inline int br_vlan_init(struct net_bridge
*br
)
913 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
)
918 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
923 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
927 static inline struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
,
933 static inline int nbp_vlan_init(struct net_bridge_port
*port
)
938 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
943 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
948 static inline int br_vlan_enabled(struct net_bridge
*br
)
953 static inline int __br_vlan_filter_toggle(struct net_bridge
*br
,
959 static inline int nbp_get_num_vlan_infos(struct net_bridge_port
*p
,
965 static inline struct net_bridge_vlan_group
*br_vlan_group(
966 const struct net_bridge
*br
)
971 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
972 const struct net_bridge_port
*p
)
977 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
978 const struct net_bridge
*br
)
983 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
984 const struct net_bridge_port
*p
)
989 static inline void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
990 struct br_vlan_stats
*stats
)
996 int (*br_dev_xmit_hook
)(struct sk_buff
*skb
);
998 extern const struct nf_br_ops __rcu
*nf_br_ops
;
1000 /* br_netfilter.c */
1001 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1002 int br_nf_core_init(void);
1003 void br_nf_core_fini(void);
1004 void br_netfilter_rtable_init(struct net_bridge
*);
1006 static inline int br_nf_core_init(void) { return 0; }
1007 static inline void br_nf_core_fini(void) {}
1008 #define br_netfilter_rtable_init(x)
1012 void br_set_state(struct net_bridge_port
*p
, unsigned int state
);
1013 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
1014 void br_init_port(struct net_bridge_port
*p
);
1015 void br_become_designated_port(struct net_bridge_port
*p
);
1017 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
1018 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
1019 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
1020 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
1021 int __set_ageing_time(struct net_device
*dev
, unsigned long t
);
1022 int br_set_ageing_time(struct net_bridge
*br
, clock_t ageing_time
);
1026 void br_stp_enable_bridge(struct net_bridge
*br
);
1027 void br_stp_disable_bridge(struct net_bridge
*br
);
1028 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
1029 void br_stp_enable_port(struct net_bridge_port
*p
);
1030 void br_stp_disable_port(struct net_bridge_port
*p
);
1031 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
1032 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
1033 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
1034 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
1035 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
1036 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
1040 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
1041 struct net_device
*dev
);
1043 /* br_stp_timer.c */
1044 void br_stp_timer_init(struct net_bridge
*br
);
1045 void br_stp_port_timer_init(struct net_bridge_port
*p
);
1046 unsigned long br_timer_value(const struct timer_list
*timer
);
1049 #if IS_ENABLED(CONFIG_ATM_LANE)
1050 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
1054 extern struct rtnl_link_ops br_link_ops
;
1055 int br_netlink_init(void);
1056 void br_netlink_fini(void);
1057 void br_ifinfo_notify(int event
, struct net_bridge_port
*port
);
1058 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1059 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1060 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
1061 u32 filter_mask
, int nlflags
);
1065 extern const struct sysfs_ops brport_sysfs_ops
;
1066 int br_sysfs_addif(struct net_bridge_port
*p
);
1067 int br_sysfs_renameif(struct net_bridge_port
*p
);
1070 int br_sysfs_addbr(struct net_device
*dev
);
1071 void br_sysfs_delbr(struct net_device
*dev
);
1075 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
1076 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
1077 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
1078 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
1079 #endif /* CONFIG_SYSFS */
1081 /* br_switchdev.c */
1082 #ifdef CONFIG_NET_SWITCHDEV
1083 int nbp_switchdev_mark_set(struct net_bridge_port
*p
);
1084 void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1085 struct sk_buff
*skb
);
1086 bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1087 const struct sk_buff
*skb
);
1089 static inline int nbp_switchdev_mark_set(struct net_bridge_port
*p
)
1094 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1095 struct sk_buff
*skb
)
1099 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1100 const struct sk_buff
*skb
)
1104 #endif /* CONFIG_NET_SWITCHDEV */