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
;
58 unsigned char prio
[2];
59 unsigned char addr
[ETH_ALEN
];
63 unsigned char addr
[ETH_ALEN
];
66 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
68 struct bridge_mcast_own_query
{
69 struct timer_list timer
;
74 struct bridge_mcast_other_query
{
75 struct timer_list timer
;
76 unsigned long delay_time
;
79 /* selected querier */
80 struct bridge_mcast_querier
{
82 struct net_bridge_port __rcu
*port
;
85 /* IGMP/MLD statistics */
86 struct bridge_mcast_stats
{
87 struct br_mcast_stats mstats
;
88 struct u64_stats_sync syncp
;
92 struct br_vlan_stats
{
97 struct u64_stats_sync syncp
;
100 struct br_tunnel_info
{
102 struct metadata_dst
*tunnel_dst
;
106 * struct net_bridge_vlan - per-vlan entry
108 * @vnode: rhashtable member
110 * @flags: bridge vlan flags
111 * @stats: per-cpu VLAN statistics
112 * @br: if MASTER flag set, this points to a bridge struct
113 * @port: if MASTER flag unset, this points to a port struct
114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
116 * for this VLAN entry
117 * @vlist: sorted list of VLAN entries
118 * @rcu: used for entry destruction
120 * This structure is shared between the global per-VLAN entries contained in
121 * the bridge rhashtable and the local per-port per-VLAN entries contained in
122 * the port's rhashtable. The union entries should be interpreted depending on
123 * the entry flags that are set.
125 struct net_bridge_vlan
{
126 struct rhash_head vnode
;
127 struct rhash_head tnode
;
130 struct br_vlan_stats __percpu
*stats
;
132 struct net_bridge
*br
;
133 struct net_bridge_port
*port
;
137 struct net_bridge_vlan
*brvlan
;
140 struct br_tunnel_info tinfo
;
142 struct list_head vlist
;
148 * struct net_bridge_vlan_group
150 * @vlan_hash: VLAN entry rhashtable
151 * @vlan_list: sorted VLAN entry list
152 * @num_vlans: number of total VLAN entries
153 * @pvid: PVID VLAN id
155 * IMPORTANT: Be careful when checking if there're VLAN entries using list
156 * primitives because the bridge can have entries in its list which
157 * are just for global context but not for filtering, i.e. they have
158 * the master flag set but not the brentry flag. If you have to check
159 * if there're "real" entries in the bridge please test @num_vlans
161 struct net_bridge_vlan_group
{
162 struct rhashtable vlan_hash
;
163 struct rhashtable tunnel_hash
;
164 struct list_head vlan_list
;
169 struct net_bridge_fdb_key
{
174 struct net_bridge_fdb_entry
{
175 struct rhash_head rhnode
;
176 struct net_bridge_port
*dst
;
178 struct net_bridge_fdb_key key
;
179 struct hlist_node fdb_node
;
180 unsigned char is_local
:1,
184 added_by_external_learn
:1,
187 /* write-heavy members should not affect lookups */
188 unsigned long updated ____cacheline_aligned_in_smp
;
194 #define MDB_PG_FLAGS_PERMANENT BIT(0)
195 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
197 struct net_bridge_port_group
{
198 struct net_bridge_port
*port
;
199 struct net_bridge_port_group __rcu
*next
;
200 struct hlist_node mglist
;
202 struct timer_list timer
;
205 unsigned char eth_addr
[ETH_ALEN
];
208 struct net_bridge_mdb_entry
{
209 struct hlist_node hlist
[2];
210 struct net_bridge
*br
;
211 struct net_bridge_port_group __rcu
*ports
;
213 struct timer_list timer
;
218 struct net_bridge_mdb_htable
{
219 struct hlist_head
*mhash
;
221 struct net_bridge_mdb_htable
*old
;
228 struct net_bridge_port
{
229 struct net_bridge
*br
;
230 struct net_device
*dev
;
231 struct list_head list
;
234 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
235 struct net_bridge_vlan_group __rcu
*vlgrp
;
237 struct net_bridge_port __rcu
*backup_port
;
243 unsigned char topology_change_ack
;
244 unsigned char config_pending
;
246 port_id designated_port
;
247 bridge_id designated_root
;
248 bridge_id designated_bridge
;
251 unsigned long designated_age
;
253 struct timer_list forward_delay_timer
;
254 struct timer_list hold_timer
;
255 struct timer_list message_age_timer
;
259 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
260 struct bridge_mcast_own_query ip4_own_query
;
261 #if IS_ENABLED(CONFIG_IPV6)
262 struct bridge_mcast_own_query ip6_own_query
;
263 #endif /* IS_ENABLED(CONFIG_IPV6) */
264 unsigned char multicast_router
;
265 struct bridge_mcast_stats __percpu
*mcast_stats
;
266 struct timer_list multicast_router_timer
;
267 struct hlist_head mglist
;
268 struct hlist_node rlist
;
272 char sysfs_name
[IFNAMSIZ
];
275 #ifdef CONFIG_NET_POLL_CONTROLLER
278 #ifdef CONFIG_NET_SWITCHDEV
279 int offload_fwd_mark
;
282 u16 backup_redirected_cnt
;
285 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
287 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
288 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
290 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
292 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
294 return rcu_dereference(dev
->rx_handler_data
);
297 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
299 return br_port_exists(dev
) ?
300 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
303 static inline struct net_bridge_port
*br_port_get_rtnl_rcu(const struct net_device
*dev
)
305 return br_port_exists(dev
) ?
306 rcu_dereference_rtnl(dev
->rx_handler_data
) : NULL
;
309 enum net_bridge_opts
{
311 BROPT_VLAN_STATS_ENABLED
,
312 BROPT_NF_CALL_IPTABLES
,
313 BROPT_NF_CALL_IP6TABLES
,
314 BROPT_NF_CALL_ARPTABLES
,
315 BROPT_GROUP_ADDR_SET
,
316 BROPT_MULTICAST_ENABLED
,
321 spinlock_t hash_lock
;
322 struct list_head port_list
;
323 struct net_device
*dev
;
324 struct pcpu_sw_netstats __percpu
*stats
;
325 unsigned long options
;
326 /* These fields are accessed on each packet */
327 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
330 struct net_bridge_vlan_group __rcu
*vlgrp
;
333 struct rhashtable fdb_hash_tbl
;
334 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
336 struct rtable fake_rtable
;
337 struct rt6_info fake_rt6_info
;
341 u16 group_fwd_mask_required
;
344 bridge_id designated_root
;
347 unsigned char topology_change
;
348 unsigned char topology_change_detected
;
350 unsigned long max_age
;
351 unsigned long hello_time
;
352 unsigned long forward_delay
;
353 unsigned long ageing_time
;
354 unsigned long bridge_max_age
;
355 unsigned long bridge_hello_time
;
356 unsigned long bridge_forward_delay
;
357 unsigned long bridge_ageing_time
;
359 u8 group_addr
[ETH_ALEN
];
362 BR_NO_STP
, /* no spanning tree */
363 BR_KERNEL_STP
, /* old STP in kernel */
364 BR_USER_STP
, /* new RSTP in userspace */
367 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
368 unsigned char multicast_router
;
370 u8 multicast_querier
:1;
371 u8 multicast_query_use_ifaddr
:1;
373 u8 multicast_stats_enabled
:1;
378 u32 multicast_last_member_count
;
379 u32 multicast_startup_query_count
;
381 u8 multicast_igmp_version
;
383 unsigned long multicast_last_member_interval
;
384 unsigned long multicast_membership_interval
;
385 unsigned long multicast_querier_interval
;
386 unsigned long multicast_query_interval
;
387 unsigned long multicast_query_response_interval
;
388 unsigned long multicast_startup_query_interval
;
390 spinlock_t multicast_lock
;
391 struct net_bridge_mdb_htable __rcu
*mdb
;
392 struct hlist_head router_list
;
394 struct timer_list multicast_router_timer
;
395 struct bridge_mcast_other_query ip4_other_query
;
396 struct bridge_mcast_own_query ip4_own_query
;
397 struct bridge_mcast_querier ip4_querier
;
398 struct bridge_mcast_stats __percpu
*mcast_stats
;
399 #if IS_ENABLED(CONFIG_IPV6)
400 struct bridge_mcast_other_query ip6_other_query
;
401 struct bridge_mcast_own_query ip6_own_query
;
402 struct bridge_mcast_querier ip6_querier
;
403 u8 multicast_mld_version
;
404 #endif /* IS_ENABLED(CONFIG_IPV6) */
407 struct timer_list hello_timer
;
408 struct timer_list tcn_timer
;
409 struct timer_list topology_change_timer
;
410 struct delayed_work gc_work
;
411 struct kobject
*ifobj
;
414 #ifdef CONFIG_NET_SWITCHDEV
415 int offload_fwd_mark
;
417 bool neigh_suppress_enabled
;
418 bool mtu_set_by_user
;
419 struct hlist_head fdb_list
;
422 struct br_input_skb_cb
{
423 struct net_device
*brdev
;
425 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
430 bool proxyarp_replied
;
431 bool src_port_isolated
;
433 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
437 #ifdef CONFIG_NET_SWITCHDEV
438 int offload_fwd_mark
;
442 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
444 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
445 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
447 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
450 #define br_printk(level, br, format, args...) \
451 printk(level "%s: " format, (br)->dev->name, ##args)
453 #define br_err(__br, format, args...) \
454 br_printk(KERN_ERR, __br, format, ##args)
455 #define br_warn(__br, format, args...) \
456 br_printk(KERN_WARNING, __br, format, ##args)
457 #define br_notice(__br, format, args...) \
458 br_printk(KERN_NOTICE, __br, format, ##args)
459 #define br_info(__br, format, args...) \
460 br_printk(KERN_INFO, __br, format, ##args)
462 #define br_debug(br, format, args...) \
463 pr_debug("%s: " format, (br)->dev->name, ##args)
465 /* called under bridge lock */
466 static inline int br_is_root_bridge(const struct net_bridge
*br
)
468 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
471 /* check if a VLAN entry is global */
472 static inline bool br_vlan_is_master(const struct net_bridge_vlan
*v
)
474 return v
->flags
& BRIDGE_VLAN_INFO_MASTER
;
477 /* check if a VLAN entry is used by the bridge */
478 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan
*v
)
480 return v
->flags
& BRIDGE_VLAN_INFO_BRENTRY
;
483 /* check if we should use the vlan entry, returns false if it's only context */
484 static inline bool br_vlan_should_use(const struct net_bridge_vlan
*v
)
486 if (br_vlan_is_master(v
)) {
487 if (br_vlan_is_brentry(v
))
496 static inline int br_opt_get(const struct net_bridge
*br
,
497 enum net_bridge_opts opt
)
499 return test_bit(opt
, &br
->options
);
502 void br_opt_toggle(struct net_bridge
*br
, enum net_bridge_opts opt
, bool on
);
505 void br_dev_setup(struct net_device
*dev
);
506 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
507 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
508 #ifdef CONFIG_NET_POLL_CONTROLLER
509 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
512 struct netpoll
*np
= p
->np
;
515 netpoll_send_skb(np
, skb
);
518 int br_netpoll_enable(struct net_bridge_port
*p
);
519 void br_netpoll_disable(struct net_bridge_port
*p
);
521 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
526 static inline int br_netpoll_enable(struct net_bridge_port
*p
)
531 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
537 int br_fdb_init(void);
538 void br_fdb_fini(void);
539 int br_fdb_hash_init(struct net_bridge
*br
);
540 void br_fdb_hash_fini(struct net_bridge
*br
);
541 void br_fdb_flush(struct net_bridge
*br
);
542 void br_fdb_find_delete_local(struct net_bridge
*br
,
543 const struct net_bridge_port
*p
,
544 const unsigned char *addr
, u16 vid
);
545 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
546 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
547 void br_fdb_cleanup(struct work_struct
*work
);
548 void br_fdb_delete_by_port(struct net_bridge
*br
,
549 const struct net_bridge_port
*p
, u16 vid
, int do_all
);
550 struct net_bridge_fdb_entry
*br_fdb_find_rcu(struct net_bridge
*br
,
551 const unsigned char *addr
,
553 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
554 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
556 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
557 const unsigned char *addr
, u16 vid
);
558 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
559 const unsigned char *addr
, u16 vid
, bool added_by_user
);
561 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
562 struct net_device
*dev
, const unsigned char *addr
, u16 vid
);
563 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
564 const unsigned char *addr
, u16 vid
, u16 nlh_flags
);
565 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
566 struct net_device
*dev
, struct net_device
*fdev
, int *idx
);
567 int br_fdb_sync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
568 void br_fdb_unsync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
569 int br_fdb_external_learn_add(struct net_bridge
*br
, struct net_bridge_port
*p
,
570 const unsigned char *addr
, u16 vid
,
572 int br_fdb_external_learn_del(struct net_bridge
*br
, struct net_bridge_port
*p
,
573 const unsigned char *addr
, u16 vid
,
575 void br_fdb_offloaded_set(struct net_bridge
*br
, struct net_bridge_port
*p
,
576 const unsigned char *addr
, u16 vid
);
584 int br_dev_queue_push_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
585 void br_forward(const struct net_bridge_port
*to
, struct sk_buff
*skb
,
586 bool local_rcv
, bool local_orig
);
587 int br_forward_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
588 void br_flood(struct net_bridge
*br
, struct sk_buff
*skb
,
589 enum br_pkt_type pkt_type
, bool local_rcv
, bool local_orig
);
591 /* return true if both source port and dest port are isolated */
592 static inline bool br_skb_isolated(const struct net_bridge_port
*to
,
593 const struct sk_buff
*skb
)
595 return BR_INPUT_SKB_CB(skb
)->src_port_isolated
&&
596 (to
->flags
& BR_ISOLATED
);
600 void br_port_carrier_check(struct net_bridge_port
*p
, bool *notified
);
601 int br_add_bridge(struct net
*net
, const char *name
);
602 int br_del_bridge(struct net
*net
, const char *name
);
603 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
,
604 struct netlink_ext_ack
*extack
);
605 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
606 void br_mtu_auto_adjust(struct net_bridge
*br
);
607 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
608 netdev_features_t features
);
609 void br_port_flags_change(struct net_bridge_port
*port
, unsigned long mask
);
610 void br_manage_promisc(struct net_bridge
*br
);
611 int nbp_backup_change(struct net_bridge_port
*p
, struct net_device
*backup_dev
);
614 int br_handle_frame_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
615 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
617 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
619 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
622 static inline bool br_rx_handler_check_rtnl(const struct net_device
*dev
)
624 return rcu_dereference_rtnl(dev
->rx_handler
) == br_handle_frame
;
627 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
629 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
632 static inline struct net_bridge_port
*
633 br_port_get_check_rtnl(const struct net_device
*dev
)
635 return br_rx_handler_check_rtnl(dev
) ? br_port_get_rtnl_rcu(dev
) : NULL
;
639 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
640 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
644 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
645 extern unsigned int br_mdb_rehash_seq
;
646 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
647 struct sk_buff
*skb
, u16 vid
);
648 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
649 struct sk_buff
*skb
, u16 vid
);
650 int br_multicast_add_port(struct net_bridge_port
*port
);
651 void br_multicast_del_port(struct net_bridge_port
*port
);
652 void br_multicast_enable_port(struct net_bridge_port
*port
);
653 void br_multicast_disable_port(struct net_bridge_port
*port
);
654 void br_multicast_init(struct net_bridge
*br
);
655 void br_multicast_open(struct net_bridge
*br
);
656 void br_multicast_stop(struct net_bridge
*br
);
657 void br_multicast_dev_del(struct net_bridge
*br
);
658 void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
659 struct sk_buff
*skb
, bool local_rcv
, bool local_orig
);
660 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
661 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
662 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
663 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
664 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
665 int br_multicast_set_igmp_version(struct net_bridge
*br
, unsigned long val
);
666 #if IS_ENABLED(CONFIG_IPV6)
667 int br_multicast_set_mld_version(struct net_bridge
*br
, unsigned long val
);
669 struct net_bridge_mdb_entry
*
670 br_mdb_ip_get(struct net_bridge_mdb_htable
*mdb
, struct br_ip
*dst
);
671 struct net_bridge_mdb_entry
*
672 br_multicast_new_group(struct net_bridge
*br
, struct net_bridge_port
*port
,
673 struct br_ip
*group
);
674 void br_multicast_free_pg(struct rcu_head
*head
);
675 struct net_bridge_port_group
*
676 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
677 struct net_bridge_port_group __rcu
*next
,
678 unsigned char flags
, const unsigned char *src
);
679 void br_mdb_init(void);
680 void br_mdb_uninit(void);
681 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
682 struct br_ip
*group
, int type
, u8 flags
);
683 void br_rtr_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
685 void br_multicast_count(struct net_bridge
*br
, const struct net_bridge_port
*p
,
686 const struct sk_buff
*skb
, u8 type
, u8 dir
);
687 int br_multicast_init_stats(struct net_bridge
*br
);
688 void br_multicast_uninit_stats(struct net_bridge
*br
);
689 void br_multicast_get_stats(const struct net_bridge
*br
,
690 const struct net_bridge_port
*p
,
691 struct br_mcast_stats
*dest
);
693 #define mlock_dereference(X, br) \
694 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
696 static inline bool br_multicast_is_router(struct net_bridge
*br
)
698 return br
->multicast_router
== 2 ||
699 (br
->multicast_router
== 1 &&
700 timer_pending(&br
->multicast_router_timer
));
704 __br_multicast_querier_exists(struct net_bridge
*br
,
705 struct bridge_mcast_other_query
*querier
,
708 bool own_querier_enabled
;
710 if (br
->multicast_querier
) {
711 if (is_ipv6
&& !br
->has_ipv6_addr
)
712 own_querier_enabled
= false;
714 own_querier_enabled
= true;
716 own_querier_enabled
= false;
719 return time_is_before_jiffies(querier
->delay_time
) &&
720 (own_querier_enabled
|| timer_pending(&querier
->timer
));
723 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
726 switch (eth
->h_proto
) {
727 case (htons(ETH_P_IP
)):
728 return __br_multicast_querier_exists(br
,
729 &br
->ip4_other_query
, false);
730 #if IS_ENABLED(CONFIG_IPV6)
731 case (htons(ETH_P_IPV6
)):
732 return __br_multicast_querier_exists(br
,
733 &br
->ip6_other_query
, true);
740 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
742 return BR_INPUT_SKB_CB(skb
)->igmp
;
745 static inline int br_multicast_rcv(struct net_bridge
*br
,
746 struct net_bridge_port
*port
,
753 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
754 struct sk_buff
*skb
, u16 vid
)
759 static inline int br_multicast_add_port(struct net_bridge_port
*port
)
764 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
768 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
772 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
776 static inline void br_multicast_init(struct net_bridge
*br
)
780 static inline void br_multicast_open(struct net_bridge
*br
)
784 static inline void br_multicast_stop(struct net_bridge
*br
)
788 static inline void br_multicast_dev_del(struct net_bridge
*br
)
792 static inline void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
794 bool local_rcv
, bool local_orig
)
798 static inline bool br_multicast_is_router(struct net_bridge
*br
)
803 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
809 static inline void br_mdb_init(void)
813 static inline void br_mdb_uninit(void)
817 static inline void br_multicast_count(struct net_bridge
*br
,
818 const struct net_bridge_port
*p
,
819 const struct sk_buff
*skb
,
824 static inline int br_multicast_init_stats(struct net_bridge
*br
)
829 static inline void br_multicast_uninit_stats(struct net_bridge
*br
)
833 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
840 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
841 bool br_allowed_ingress(const struct net_bridge
*br
,
842 struct net_bridge_vlan_group
*vg
, struct sk_buff
*skb
,
844 bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
845 const struct sk_buff
*skb
);
846 bool br_should_learn(struct net_bridge_port
*p
, struct sk_buff
*skb
, u16
*vid
);
847 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
848 const struct net_bridge_port
*port
,
849 struct net_bridge_vlan_group
*vg
,
850 struct sk_buff
*skb
);
851 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
853 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
854 void br_vlan_flush(struct net_bridge
*br
);
855 struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
, u16 vid
);
856 void br_recalculate_fwd_mask(struct net_bridge
*br
);
857 int __br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
858 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
859 int __br_vlan_set_proto(struct net_bridge
*br
, __be16 proto
);
860 int br_vlan_set_proto(struct net_bridge
*br
, unsigned long val
);
861 int br_vlan_set_stats(struct net_bridge
*br
, unsigned long val
);
862 int br_vlan_init(struct net_bridge
*br
);
863 int br_vlan_set_default_pvid(struct net_bridge
*br
, unsigned long val
);
864 int __br_vlan_set_default_pvid(struct net_bridge
*br
, u16 pvid
);
865 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
867 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
868 void nbp_vlan_flush(struct net_bridge_port
*port
);
869 int nbp_vlan_init(struct net_bridge_port
*port
);
870 int nbp_get_num_vlan_infos(struct net_bridge_port
*p
, u32 filter_mask
);
871 void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
872 struct br_vlan_stats
*stats
);
874 static inline struct net_bridge_vlan_group
*br_vlan_group(
875 const struct net_bridge
*br
)
877 return rtnl_dereference(br
->vlgrp
);
880 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
881 const struct net_bridge_port
*p
)
883 return rtnl_dereference(p
->vlgrp
);
886 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
887 const struct net_bridge
*br
)
889 return rcu_dereference(br
->vlgrp
);
892 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
893 const struct net_bridge_port
*p
)
895 return rcu_dereference(p
->vlgrp
);
898 /* Since bridge now depends on 8021Q module, but the time bridge sees the
899 * skb, the vlan tag will always be present if the frame was tagged.
901 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
905 if (skb_vlan_tag_present(skb
)) {
906 *vid
= skb_vlan_tag_get(skb
) & VLAN_VID_MASK
;
915 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
925 static inline bool br_allowed_ingress(const struct net_bridge
*br
,
926 struct net_bridge_vlan_group
*vg
,
933 static inline bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
934 const struct sk_buff
*skb
)
939 static inline bool br_should_learn(struct net_bridge_port
*p
,
940 struct sk_buff
*skb
, u16
*vid
)
945 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
946 const struct net_bridge_port
*port
,
947 struct net_bridge_vlan_group
*vg
,
953 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
960 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
965 static inline void br_vlan_flush(struct net_bridge
*br
)
969 static inline void br_recalculate_fwd_mask(struct net_bridge
*br
)
973 static inline int br_vlan_init(struct net_bridge
*br
)
978 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
985 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
990 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
994 static inline struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
,
1000 static inline int nbp_vlan_init(struct net_bridge_port
*port
)
1005 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
1010 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
1015 static inline int __br_vlan_filter_toggle(struct net_bridge
*br
,
1021 static inline int nbp_get_num_vlan_infos(struct net_bridge_port
*p
,
1027 static inline struct net_bridge_vlan_group
*br_vlan_group(
1028 const struct net_bridge
*br
)
1033 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
1034 const struct net_bridge_port
*p
)
1039 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
1040 const struct net_bridge
*br
)
1045 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
1046 const struct net_bridge_port
*p
)
1051 static inline void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
1052 struct br_vlan_stats
*stats
)
1058 int (*br_dev_xmit_hook
)(struct sk_buff
*skb
);
1060 extern const struct nf_br_ops __rcu
*nf_br_ops
;
1062 /* br_netfilter.c */
1063 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1064 int br_nf_core_init(void);
1065 void br_nf_core_fini(void);
1066 void br_netfilter_rtable_init(struct net_bridge
*);
1068 static inline int br_nf_core_init(void) { return 0; }
1069 static inline void br_nf_core_fini(void) {}
1070 #define br_netfilter_rtable_init(x)
1074 void br_set_state(struct net_bridge_port
*p
, unsigned int state
);
1075 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
1076 void br_init_port(struct net_bridge_port
*p
);
1077 void br_become_designated_port(struct net_bridge_port
*p
);
1079 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
1080 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
1081 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
1082 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
1083 int __set_ageing_time(struct net_device
*dev
, unsigned long t
);
1084 int br_set_ageing_time(struct net_bridge
*br
, clock_t ageing_time
);
1088 void br_stp_enable_bridge(struct net_bridge
*br
);
1089 void br_stp_disable_bridge(struct net_bridge
*br
);
1090 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
1091 void br_stp_enable_port(struct net_bridge_port
*p
);
1092 void br_stp_disable_port(struct net_bridge_port
*p
);
1093 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
1094 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
1095 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
1096 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
1097 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
1098 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
1102 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
1103 struct net_device
*dev
);
1105 /* br_stp_timer.c */
1106 void br_stp_timer_init(struct net_bridge
*br
);
1107 void br_stp_port_timer_init(struct net_bridge_port
*p
);
1108 unsigned long br_timer_value(const struct timer_list
*timer
);
1111 #if IS_ENABLED(CONFIG_ATM_LANE)
1112 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
1116 extern struct rtnl_link_ops br_link_ops
;
1117 int br_netlink_init(void);
1118 void br_netlink_fini(void);
1119 void br_ifinfo_notify(int event
, const struct net_bridge
*br
,
1120 const struct net_bridge_port
*port
);
1121 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1122 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1123 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
1124 u32 filter_mask
, int nlflags
);
1128 extern const struct sysfs_ops brport_sysfs_ops
;
1129 int br_sysfs_addif(struct net_bridge_port
*p
);
1130 int br_sysfs_renameif(struct net_bridge_port
*p
);
1133 int br_sysfs_addbr(struct net_device
*dev
);
1134 void br_sysfs_delbr(struct net_device
*dev
);
1138 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
1139 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
1140 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
1141 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
1142 #endif /* CONFIG_SYSFS */
1144 /* br_switchdev.c */
1145 #ifdef CONFIG_NET_SWITCHDEV
1146 int nbp_switchdev_mark_set(struct net_bridge_port
*p
);
1147 void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1148 struct sk_buff
*skb
);
1149 bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1150 const struct sk_buff
*skb
);
1151 int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1152 unsigned long flags
,
1153 unsigned long mask
);
1154 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
,
1156 int br_switchdev_port_vlan_add(struct net_device
*dev
, u16 vid
, u16 flags
);
1157 int br_switchdev_port_vlan_del(struct net_device
*dev
, u16 vid
);
1159 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1161 skb
->offload_fwd_mark
= 0;
1164 static inline int nbp_switchdev_mark_set(struct net_bridge_port
*p
)
1169 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1170 struct sk_buff
*skb
)
1174 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1175 const struct sk_buff
*skb
)
1180 static inline int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1181 unsigned long flags
,
1187 static inline int br_switchdev_port_vlan_add(struct net_device
*dev
,
1193 static inline int br_switchdev_port_vlan_del(struct net_device
*dev
, u16 vid
)
1199 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
, int type
)
1203 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1206 #endif /* CONFIG_NET_SWITCHDEV */
1208 /* br_arp_nd_proxy.c */
1209 void br_recalculate_neigh_suppress_enabled(struct net_bridge
*br
);
1210 void br_do_proxy_suppress_arp(struct sk_buff
*skb
, struct net_bridge
*br
,
1211 u16 vid
, struct net_bridge_port
*p
);
1212 void br_do_suppress_nd(struct sk_buff
*skb
, struct net_bridge
*br
,
1213 u16 vid
, struct net_bridge_port
*p
, struct nd_msg
*msg
);
1214 struct nd_msg
*br_is_nd_neigh_msg(struct sk_buff
*skb
, struct nd_msg
*m
);