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
;
105 /* private vlan flags */
107 BR_VLFLAG_PER_PORT_STATS
= BIT(0),
111 * struct net_bridge_vlan - per-vlan entry
113 * @vnode: rhashtable member
115 * @flags: bridge vlan flags
116 * @priv_flags: private (in-kernel) bridge vlan flags
117 * @stats: per-cpu VLAN statistics
118 * @br: if MASTER flag set, this points to a bridge struct
119 * @port: if MASTER flag unset, this points to a port struct
120 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
121 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
122 * for this VLAN entry
123 * @vlist: sorted list of VLAN entries
124 * @rcu: used for entry destruction
126 * This structure is shared between the global per-VLAN entries contained in
127 * the bridge rhashtable and the local per-port per-VLAN entries contained in
128 * the port's rhashtable. The union entries should be interpreted depending on
129 * the entry flags that are set.
131 struct net_bridge_vlan
{
132 struct rhash_head vnode
;
133 struct rhash_head tnode
;
137 struct br_vlan_stats __percpu
*stats
;
139 struct net_bridge
*br
;
140 struct net_bridge_port
*port
;
144 struct net_bridge_vlan
*brvlan
;
147 struct br_tunnel_info tinfo
;
149 struct list_head vlist
;
155 * struct net_bridge_vlan_group
157 * @vlan_hash: VLAN entry rhashtable
158 * @vlan_list: sorted VLAN entry list
159 * @num_vlans: number of total VLAN entries
160 * @pvid: PVID VLAN id
162 * IMPORTANT: Be careful when checking if there're VLAN entries using list
163 * primitives because the bridge can have entries in its list which
164 * are just for global context but not for filtering, i.e. they have
165 * the master flag set but not the brentry flag. If you have to check
166 * if there're "real" entries in the bridge please test @num_vlans
168 struct net_bridge_vlan_group
{
169 struct rhashtable vlan_hash
;
170 struct rhashtable tunnel_hash
;
171 struct list_head vlan_list
;
176 struct net_bridge_fdb_key
{
181 struct net_bridge_fdb_entry
{
182 struct rhash_head rhnode
;
183 struct net_bridge_port
*dst
;
185 struct net_bridge_fdb_key key
;
186 struct hlist_node fdb_node
;
187 unsigned char is_local
:1,
191 added_by_external_learn
:1,
194 /* write-heavy members should not affect lookups */
195 unsigned long updated ____cacheline_aligned_in_smp
;
201 #define MDB_PG_FLAGS_PERMANENT BIT(0)
202 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
204 struct net_bridge_port_group
{
205 struct net_bridge_port
*port
;
206 struct net_bridge_port_group __rcu
*next
;
207 struct hlist_node mglist
;
209 struct timer_list timer
;
212 unsigned char eth_addr
[ETH_ALEN
];
215 struct net_bridge_mdb_entry
{
216 struct rhash_head rhnode
;
217 struct net_bridge
*br
;
218 struct net_bridge_port_group __rcu
*ports
;
220 struct timer_list timer
;
223 struct hlist_node mdb_node
;
226 struct net_bridge_port
{
227 struct net_bridge
*br
;
228 struct net_device
*dev
;
229 struct list_head list
;
232 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
233 struct net_bridge_vlan_group __rcu
*vlgrp
;
235 struct net_bridge_port __rcu
*backup_port
;
241 unsigned char topology_change_ack
;
242 unsigned char config_pending
;
244 port_id designated_port
;
245 bridge_id designated_root
;
246 bridge_id designated_bridge
;
249 unsigned long designated_age
;
251 struct timer_list forward_delay_timer
;
252 struct timer_list hold_timer
;
253 struct timer_list message_age_timer
;
257 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
258 struct bridge_mcast_own_query ip4_own_query
;
259 #if IS_ENABLED(CONFIG_IPV6)
260 struct bridge_mcast_own_query ip6_own_query
;
261 #endif /* IS_ENABLED(CONFIG_IPV6) */
262 unsigned char multicast_router
;
263 struct bridge_mcast_stats __percpu
*mcast_stats
;
264 struct timer_list multicast_router_timer
;
265 struct hlist_head mglist
;
266 struct hlist_node rlist
;
270 char sysfs_name
[IFNAMSIZ
];
273 #ifdef CONFIG_NET_POLL_CONTROLLER
276 #ifdef CONFIG_NET_SWITCHDEV
277 int offload_fwd_mark
;
280 u16 backup_redirected_cnt
;
283 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
285 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
286 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
288 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
290 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
292 return rcu_dereference(dev
->rx_handler_data
);
295 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
297 return br_port_exists(dev
) ?
298 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
301 static inline struct net_bridge_port
*br_port_get_rtnl_rcu(const struct net_device
*dev
)
303 return br_port_exists(dev
) ?
304 rcu_dereference_rtnl(dev
->rx_handler_data
) : NULL
;
307 enum net_bridge_opts
{
309 BROPT_VLAN_STATS_ENABLED
,
310 BROPT_NF_CALL_IPTABLES
,
311 BROPT_NF_CALL_IP6TABLES
,
312 BROPT_NF_CALL_ARPTABLES
,
313 BROPT_GROUP_ADDR_SET
,
314 BROPT_MULTICAST_ENABLED
,
315 BROPT_MULTICAST_QUERIER
,
316 BROPT_MULTICAST_QUERY_USE_IFADDR
,
317 BROPT_MULTICAST_STATS_ENABLED
,
319 BROPT_NEIGH_SUPPRESS_ENABLED
,
320 BROPT_MTU_SET_BY_USER
,
321 BROPT_VLAN_STATS_PER_PORT
,
327 spinlock_t hash_lock
;
328 struct list_head port_list
;
329 struct net_device
*dev
;
330 struct pcpu_sw_netstats __percpu
*stats
;
331 unsigned long options
;
332 /* These fields are accessed on each packet */
333 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
336 struct net_bridge_vlan_group __rcu
*vlgrp
;
339 struct rhashtable fdb_hash_tbl
;
340 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
342 struct rtable fake_rtable
;
343 struct rt6_info fake_rt6_info
;
347 u16 group_fwd_mask_required
;
350 bridge_id designated_root
;
352 unsigned char topology_change
;
353 unsigned char topology_change_detected
;
355 unsigned long max_age
;
356 unsigned long hello_time
;
357 unsigned long forward_delay
;
358 unsigned long ageing_time
;
359 unsigned long bridge_max_age
;
360 unsigned long bridge_hello_time
;
361 unsigned long bridge_forward_delay
;
362 unsigned long bridge_ageing_time
;
365 u8 group_addr
[ETH_ALEN
];
368 BR_NO_STP
, /* no spanning tree */
369 BR_KERNEL_STP
, /* old STP in kernel */
370 BR_USER_STP
, /* new RSTP in userspace */
373 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
378 u32 multicast_last_member_count
;
379 u32 multicast_startup_query_count
;
381 u8 multicast_igmp_version
;
383 #if IS_ENABLED(CONFIG_IPV6)
384 u8 multicast_mld_version
;
386 spinlock_t multicast_lock
;
387 unsigned long multicast_last_member_interval
;
388 unsigned long multicast_membership_interval
;
389 unsigned long multicast_querier_interval
;
390 unsigned long multicast_query_interval
;
391 unsigned long multicast_query_response_interval
;
392 unsigned long multicast_startup_query_interval
;
394 struct rhashtable mdb_hash_tbl
;
396 struct hlist_head mdb_list
;
397 struct hlist_head router_list
;
399 struct timer_list multicast_router_timer
;
400 struct bridge_mcast_other_query ip4_other_query
;
401 struct bridge_mcast_own_query ip4_own_query
;
402 struct bridge_mcast_querier ip4_querier
;
403 struct bridge_mcast_stats __percpu
*mcast_stats
;
404 #if IS_ENABLED(CONFIG_IPV6)
405 struct bridge_mcast_other_query ip6_other_query
;
406 struct bridge_mcast_own_query ip6_own_query
;
407 struct bridge_mcast_querier ip6_querier
;
408 #endif /* IS_ENABLED(CONFIG_IPV6) */
411 struct timer_list hello_timer
;
412 struct timer_list tcn_timer
;
413 struct timer_list topology_change_timer
;
414 struct delayed_work gc_work
;
415 struct kobject
*ifobj
;
418 #ifdef CONFIG_NET_SWITCHDEV
419 int offload_fwd_mark
;
421 struct hlist_head fdb_list
;
424 struct br_input_skb_cb
{
425 struct net_device
*brdev
;
427 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
432 bool proxyarp_replied
;
433 bool src_port_isolated
;
435 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
439 #ifdef CONFIG_NET_SWITCHDEV
440 int offload_fwd_mark
;
444 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
446 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
447 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
449 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
452 #define br_printk(level, br, format, args...) \
453 printk(level "%s: " format, (br)->dev->name, ##args)
455 #define br_err(__br, format, args...) \
456 br_printk(KERN_ERR, __br, format, ##args)
457 #define br_warn(__br, format, args...) \
458 br_printk(KERN_WARNING, __br, format, ##args)
459 #define br_notice(__br, format, args...) \
460 br_printk(KERN_NOTICE, __br, format, ##args)
461 #define br_info(__br, format, args...) \
462 br_printk(KERN_INFO, __br, format, ##args)
464 #define br_debug(br, format, args...) \
465 pr_debug("%s: " format, (br)->dev->name, ##args)
467 /* called under bridge lock */
468 static inline int br_is_root_bridge(const struct net_bridge
*br
)
470 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
473 /* check if a VLAN entry is global */
474 static inline bool br_vlan_is_master(const struct net_bridge_vlan
*v
)
476 return v
->flags
& BRIDGE_VLAN_INFO_MASTER
;
479 /* check if a VLAN entry is used by the bridge */
480 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan
*v
)
482 return v
->flags
& BRIDGE_VLAN_INFO_BRENTRY
;
485 /* check if we should use the vlan entry, returns false if it's only context */
486 static inline bool br_vlan_should_use(const struct net_bridge_vlan
*v
)
488 if (br_vlan_is_master(v
)) {
489 if (br_vlan_is_brentry(v
))
498 static inline int br_opt_get(const struct net_bridge
*br
,
499 enum net_bridge_opts opt
)
501 return test_bit(opt
, &br
->options
);
504 int br_boolopt_toggle(struct net_bridge
*br
, enum br_boolopt_id opt
, bool on
,
505 struct netlink_ext_ack
*extack
);
506 int br_boolopt_get(const struct net_bridge
*br
, enum br_boolopt_id opt
);
507 int br_boolopt_multi_toggle(struct net_bridge
*br
,
508 struct br_boolopt_multi
*bm
,
509 struct netlink_ext_ack
*extack
);
510 void br_boolopt_multi_get(const struct net_bridge
*br
,
511 struct br_boolopt_multi
*bm
);
512 void br_opt_toggle(struct net_bridge
*br
, enum net_bridge_opts opt
, bool on
);
515 void br_dev_setup(struct net_device
*dev
);
516 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
517 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
518 #ifdef CONFIG_NET_POLL_CONTROLLER
519 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
522 struct netpoll
*np
= p
->np
;
525 netpoll_send_skb(np
, skb
);
528 int br_netpoll_enable(struct net_bridge_port
*p
);
529 void br_netpoll_disable(struct net_bridge_port
*p
);
531 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
536 static inline int br_netpoll_enable(struct net_bridge_port
*p
)
541 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
547 int br_fdb_init(void);
548 void br_fdb_fini(void);
549 int br_fdb_hash_init(struct net_bridge
*br
);
550 void br_fdb_hash_fini(struct net_bridge
*br
);
551 void br_fdb_flush(struct net_bridge
*br
);
552 void br_fdb_find_delete_local(struct net_bridge
*br
,
553 const struct net_bridge_port
*p
,
554 const unsigned char *addr
, u16 vid
);
555 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
556 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
557 void br_fdb_cleanup(struct work_struct
*work
);
558 void br_fdb_delete_by_port(struct net_bridge
*br
,
559 const struct net_bridge_port
*p
, u16 vid
, int do_all
);
560 struct net_bridge_fdb_entry
*br_fdb_find_rcu(struct net_bridge
*br
,
561 const unsigned char *addr
,
563 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
564 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
566 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
567 const unsigned char *addr
, u16 vid
);
568 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
569 const unsigned char *addr
, u16 vid
, bool added_by_user
);
571 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
572 struct net_device
*dev
, const unsigned char *addr
, u16 vid
);
573 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
574 const unsigned char *addr
, u16 vid
, u16 nlh_flags
);
575 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
576 struct net_device
*dev
, struct net_device
*fdev
, int *idx
);
577 int br_fdb_sync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
578 void br_fdb_unsync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
579 int br_fdb_external_learn_add(struct net_bridge
*br
, struct net_bridge_port
*p
,
580 const unsigned char *addr
, u16 vid
,
582 int br_fdb_external_learn_del(struct net_bridge
*br
, struct net_bridge_port
*p
,
583 const unsigned char *addr
, u16 vid
,
585 void br_fdb_offloaded_set(struct net_bridge
*br
, struct net_bridge_port
*p
,
586 const unsigned char *addr
, u16 vid
, bool offloaded
);
594 int br_dev_queue_push_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
595 void br_forward(const struct net_bridge_port
*to
, struct sk_buff
*skb
,
596 bool local_rcv
, bool local_orig
);
597 int br_forward_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
598 void br_flood(struct net_bridge
*br
, struct sk_buff
*skb
,
599 enum br_pkt_type pkt_type
, bool local_rcv
, bool local_orig
);
601 /* return true if both source port and dest port are isolated */
602 static inline bool br_skb_isolated(const struct net_bridge_port
*to
,
603 const struct sk_buff
*skb
)
605 return BR_INPUT_SKB_CB(skb
)->src_port_isolated
&&
606 (to
->flags
& BR_ISOLATED
);
610 void br_port_carrier_check(struct net_bridge_port
*p
, bool *notified
);
611 int br_add_bridge(struct net
*net
, const char *name
);
612 int br_del_bridge(struct net
*net
, const char *name
);
613 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
,
614 struct netlink_ext_ack
*extack
);
615 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
616 void br_mtu_auto_adjust(struct net_bridge
*br
);
617 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
618 netdev_features_t features
);
619 void br_port_flags_change(struct net_bridge_port
*port
, unsigned long mask
);
620 void br_manage_promisc(struct net_bridge
*br
);
621 int nbp_backup_change(struct net_bridge_port
*p
, struct net_device
*backup_dev
);
624 int br_handle_frame_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
625 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
627 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
629 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
632 static inline bool br_rx_handler_check_rtnl(const struct net_device
*dev
)
634 return rcu_dereference_rtnl(dev
->rx_handler
) == br_handle_frame
;
637 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
639 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
642 static inline struct net_bridge_port
*
643 br_port_get_check_rtnl(const struct net_device
*dev
)
645 return br_rx_handler_check_rtnl(dev
) ? br_port_get_rtnl_rcu(dev
) : NULL
;
649 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
650 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
654 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
655 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
656 struct sk_buff
*skb
, u16 vid
);
657 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
658 struct sk_buff
*skb
, u16 vid
);
659 int br_multicast_add_port(struct net_bridge_port
*port
);
660 void br_multicast_del_port(struct net_bridge_port
*port
);
661 void br_multicast_enable_port(struct net_bridge_port
*port
);
662 void br_multicast_disable_port(struct net_bridge_port
*port
);
663 void br_multicast_init(struct net_bridge
*br
);
664 void br_multicast_open(struct net_bridge
*br
);
665 void br_multicast_stop(struct net_bridge
*br
);
666 void br_multicast_dev_del(struct net_bridge
*br
);
667 void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
668 struct sk_buff
*skb
, bool local_rcv
, bool local_orig
);
669 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
670 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
671 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
672 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
673 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
674 int br_multicast_set_igmp_version(struct net_bridge
*br
, unsigned long val
);
675 #if IS_ENABLED(CONFIG_IPV6)
676 int br_multicast_set_mld_version(struct net_bridge
*br
, unsigned long val
);
678 struct net_bridge_mdb_entry
*
679 br_mdb_ip_get(struct net_bridge
*br
, struct br_ip
*dst
);
680 struct net_bridge_mdb_entry
*
681 br_multicast_new_group(struct net_bridge
*br
, struct br_ip
*group
);
682 void br_multicast_free_pg(struct rcu_head
*head
);
683 struct net_bridge_port_group
*
684 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
685 struct net_bridge_port_group __rcu
*next
,
686 unsigned char flags
, const unsigned char *src
);
687 int br_mdb_hash_init(struct net_bridge
*br
);
688 void br_mdb_hash_fini(struct net_bridge
*br
);
689 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
690 struct br_ip
*group
, int type
, u8 flags
);
691 void br_rtr_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
693 void br_multicast_count(struct net_bridge
*br
, const struct net_bridge_port
*p
,
694 const struct sk_buff
*skb
, u8 type
, u8 dir
);
695 int br_multicast_init_stats(struct net_bridge
*br
);
696 void br_multicast_uninit_stats(struct net_bridge
*br
);
697 void br_multicast_get_stats(const struct net_bridge
*br
,
698 const struct net_bridge_port
*p
,
699 struct br_mcast_stats
*dest
);
700 void br_mdb_init(void);
701 void br_mdb_uninit(void);
703 #define mlock_dereference(X, br) \
704 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
706 static inline bool br_multicast_is_router(struct net_bridge
*br
)
708 return br
->multicast_router
== 2 ||
709 (br
->multicast_router
== 1 &&
710 timer_pending(&br
->multicast_router_timer
));
714 __br_multicast_querier_exists(struct net_bridge
*br
,
715 struct bridge_mcast_other_query
*querier
,
718 bool own_querier_enabled
;
720 if (br_opt_get(br
, BROPT_MULTICAST_QUERIER
)) {
721 if (is_ipv6
&& !br_opt_get(br
, BROPT_HAS_IPV6_ADDR
))
722 own_querier_enabled
= false;
724 own_querier_enabled
= true;
726 own_querier_enabled
= false;
729 return time_is_before_jiffies(querier
->delay_time
) &&
730 (own_querier_enabled
|| timer_pending(&querier
->timer
));
733 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
736 switch (eth
->h_proto
) {
737 case (htons(ETH_P_IP
)):
738 return __br_multicast_querier_exists(br
,
739 &br
->ip4_other_query
, false);
740 #if IS_ENABLED(CONFIG_IPV6)
741 case (htons(ETH_P_IPV6
)):
742 return __br_multicast_querier_exists(br
,
743 &br
->ip6_other_query
, true);
750 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
752 return BR_INPUT_SKB_CB(skb
)->igmp
;
755 static inline int br_multicast_rcv(struct net_bridge
*br
,
756 struct net_bridge_port
*port
,
763 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
764 struct sk_buff
*skb
, u16 vid
)
769 static inline int br_multicast_add_port(struct net_bridge_port
*port
)
774 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
778 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
782 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
786 static inline void br_multicast_init(struct net_bridge
*br
)
790 static inline void br_multicast_open(struct net_bridge
*br
)
794 static inline void br_multicast_stop(struct net_bridge
*br
)
798 static inline void br_multicast_dev_del(struct net_bridge
*br
)
802 static inline void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
804 bool local_rcv
, bool local_orig
)
808 static inline bool br_multicast_is_router(struct net_bridge
*br
)
813 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
819 static inline void br_mdb_init(void)
823 static inline void br_mdb_uninit(void)
827 static inline int br_mdb_hash_init(struct net_bridge
*br
)
832 static inline void br_mdb_hash_fini(struct net_bridge
*br
)
836 static inline void br_multicast_count(struct net_bridge
*br
,
837 const struct net_bridge_port
*p
,
838 const struct sk_buff
*skb
,
843 static inline int br_multicast_init_stats(struct net_bridge
*br
)
848 static inline void br_multicast_uninit_stats(struct net_bridge
*br
)
852 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
859 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
860 bool br_allowed_ingress(const struct net_bridge
*br
,
861 struct net_bridge_vlan_group
*vg
, struct sk_buff
*skb
,
863 bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
864 const struct sk_buff
*skb
);
865 bool br_should_learn(struct net_bridge_port
*p
, struct sk_buff
*skb
, u16
*vid
);
866 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
867 const struct net_bridge_port
*port
,
868 struct net_bridge_vlan_group
*vg
,
869 struct sk_buff
*skb
);
870 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
872 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
873 void br_vlan_flush(struct net_bridge
*br
);
874 struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
, u16 vid
);
875 void br_recalculate_fwd_mask(struct net_bridge
*br
);
876 int __br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
877 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
878 int __br_vlan_set_proto(struct net_bridge
*br
, __be16 proto
);
879 int br_vlan_set_proto(struct net_bridge
*br
, unsigned long val
);
880 int br_vlan_set_stats(struct net_bridge
*br
, unsigned long val
);
881 int br_vlan_set_stats_per_port(struct net_bridge
*br
, unsigned long val
);
882 int br_vlan_init(struct net_bridge
*br
);
883 int br_vlan_set_default_pvid(struct net_bridge
*br
, unsigned long val
);
884 int __br_vlan_set_default_pvid(struct net_bridge
*br
, u16 pvid
);
885 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
887 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
888 void nbp_vlan_flush(struct net_bridge_port
*port
);
889 int nbp_vlan_init(struct net_bridge_port
*port
);
890 int nbp_get_num_vlan_infos(struct net_bridge_port
*p
, u32 filter_mask
);
891 void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
892 struct br_vlan_stats
*stats
);
894 static inline struct net_bridge_vlan_group
*br_vlan_group(
895 const struct net_bridge
*br
)
897 return rtnl_dereference(br
->vlgrp
);
900 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
901 const struct net_bridge_port
*p
)
903 return rtnl_dereference(p
->vlgrp
);
906 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
907 const struct net_bridge
*br
)
909 return rcu_dereference(br
->vlgrp
);
912 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
913 const struct net_bridge_port
*p
)
915 return rcu_dereference(p
->vlgrp
);
918 /* Since bridge now depends on 8021Q module, but the time bridge sees the
919 * skb, the vlan tag will always be present if the frame was tagged.
921 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
925 if (skb_vlan_tag_present(skb
)) {
926 *vid
= skb_vlan_tag_get_id(skb
);
935 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
945 static inline bool br_allowed_ingress(const struct net_bridge
*br
,
946 struct net_bridge_vlan_group
*vg
,
953 static inline bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
954 const struct sk_buff
*skb
)
959 static inline bool br_should_learn(struct net_bridge_port
*p
,
960 struct sk_buff
*skb
, u16
*vid
)
965 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
966 const struct net_bridge_port
*port
,
967 struct net_bridge_vlan_group
*vg
,
973 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
980 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
985 static inline void br_vlan_flush(struct net_bridge
*br
)
989 static inline void br_recalculate_fwd_mask(struct net_bridge
*br
)
993 static inline int br_vlan_init(struct net_bridge
*br
)
998 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
1005 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
1010 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
1014 static inline struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
,
1020 static inline int nbp_vlan_init(struct net_bridge_port
*port
)
1025 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
1030 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
1035 static inline int __br_vlan_filter_toggle(struct net_bridge
*br
,
1041 static inline int nbp_get_num_vlan_infos(struct net_bridge_port
*p
,
1047 static inline struct net_bridge_vlan_group
*br_vlan_group(
1048 const struct net_bridge
*br
)
1053 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
1054 const struct net_bridge_port
*p
)
1059 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
1060 const struct net_bridge
*br
)
1065 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
1066 const struct net_bridge_port
*p
)
1071 static inline void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
1072 struct br_vlan_stats
*stats
)
1078 int (*br_dev_xmit_hook
)(struct sk_buff
*skb
);
1080 extern const struct nf_br_ops __rcu
*nf_br_ops
;
1082 /* br_netfilter.c */
1083 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1084 int br_nf_core_init(void);
1085 void br_nf_core_fini(void);
1086 void br_netfilter_rtable_init(struct net_bridge
*);
1088 static inline int br_nf_core_init(void) { return 0; }
1089 static inline void br_nf_core_fini(void) {}
1090 #define br_netfilter_rtable_init(x)
1094 void br_set_state(struct net_bridge_port
*p
, unsigned int state
);
1095 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
1096 void br_init_port(struct net_bridge_port
*p
);
1097 void br_become_designated_port(struct net_bridge_port
*p
);
1099 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
1100 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
1101 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
1102 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
1103 int __set_ageing_time(struct net_device
*dev
, unsigned long t
);
1104 int br_set_ageing_time(struct net_bridge
*br
, clock_t ageing_time
);
1108 void br_stp_enable_bridge(struct net_bridge
*br
);
1109 void br_stp_disable_bridge(struct net_bridge
*br
);
1110 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
1111 void br_stp_enable_port(struct net_bridge_port
*p
);
1112 void br_stp_disable_port(struct net_bridge_port
*p
);
1113 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
1114 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
1115 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
1116 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
1117 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
1118 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
1122 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
1123 struct net_device
*dev
);
1125 /* br_stp_timer.c */
1126 void br_stp_timer_init(struct net_bridge
*br
);
1127 void br_stp_port_timer_init(struct net_bridge_port
*p
);
1128 unsigned long br_timer_value(const struct timer_list
*timer
);
1131 #if IS_ENABLED(CONFIG_ATM_LANE)
1132 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
1136 extern struct rtnl_link_ops br_link_ops
;
1137 int br_netlink_init(void);
1138 void br_netlink_fini(void);
1139 void br_ifinfo_notify(int event
, const struct net_bridge
*br
,
1140 const struct net_bridge_port
*port
);
1141 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1142 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1143 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
1144 u32 filter_mask
, int nlflags
);
1148 extern const struct sysfs_ops brport_sysfs_ops
;
1149 int br_sysfs_addif(struct net_bridge_port
*p
);
1150 int br_sysfs_renameif(struct net_bridge_port
*p
);
1153 int br_sysfs_addbr(struct net_device
*dev
);
1154 void br_sysfs_delbr(struct net_device
*dev
);
1158 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
1159 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
1160 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
1161 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
1162 #endif /* CONFIG_SYSFS */
1164 /* br_switchdev.c */
1165 #ifdef CONFIG_NET_SWITCHDEV
1166 int nbp_switchdev_mark_set(struct net_bridge_port
*p
);
1167 void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1168 struct sk_buff
*skb
);
1169 bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1170 const struct sk_buff
*skb
);
1171 int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1172 unsigned long flags
,
1173 unsigned long mask
);
1174 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
,
1176 int br_switchdev_port_vlan_add(struct net_device
*dev
, u16 vid
, u16 flags
);
1177 int br_switchdev_port_vlan_del(struct net_device
*dev
, u16 vid
);
1179 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1181 skb
->offload_fwd_mark
= 0;
1184 static inline int nbp_switchdev_mark_set(struct net_bridge_port
*p
)
1189 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1190 struct sk_buff
*skb
)
1194 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1195 const struct sk_buff
*skb
)
1200 static inline int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1201 unsigned long flags
,
1207 static inline int br_switchdev_port_vlan_add(struct net_device
*dev
,
1213 static inline int br_switchdev_port_vlan_del(struct net_device
*dev
, u16 vid
)
1219 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
, int type
)
1223 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1226 #endif /* CONFIG_NET_SWITCHDEV */
1228 /* br_arp_nd_proxy.c */
1229 void br_recalculate_neigh_suppress_enabled(struct net_bridge
*br
);
1230 void br_do_proxy_suppress_arp(struct sk_buff
*skb
, struct net_bridge
*br
,
1231 u16 vid
, struct net_bridge_port
*p
);
1232 void br_do_suppress_nd(struct sk_buff
*skb
, struct net_bridge
*br
,
1233 u16 vid
, struct net_bridge_port
*p
, struct nd_msg
*msg
);
1234 struct nd_msg
*br_is_nd_neigh_msg(struct sk_buff
*skb
, struct nd_msg
*m
);