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_MULTICAST_DEFAULT_HASH_MAX 4096
36 #define BR_VERSION "2.3"
38 /* Control of forwarding link local multicast */
39 #define BR_GROUPFWD_DEFAULT 0
40 /* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
42 BR_GROUPFWD_STP
= BIT(0),
43 BR_GROUPFWD_MACPAUSE
= BIT(1),
44 BR_GROUPFWD_LACP
= BIT(2),
47 #define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
49 /* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
50 #define BR_GROUPFWD_8021AD 0xB801u
52 /* Path to usermode spanning tree program */
53 #define BR_STP_PROG "/sbin/bridge-stp"
55 typedef struct bridge_id bridge_id
;
56 typedef struct mac_addr mac_addr
;
57 typedef __u16 port_id
;
60 unsigned char prio
[2];
61 unsigned char addr
[ETH_ALEN
];
65 unsigned char addr
[ETH_ALEN
];
68 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
70 struct bridge_mcast_own_query
{
71 struct timer_list timer
;
76 struct bridge_mcast_other_query
{
77 struct timer_list timer
;
78 unsigned long delay_time
;
81 /* selected querier */
82 struct bridge_mcast_querier
{
84 struct net_bridge_port __rcu
*port
;
87 /* IGMP/MLD statistics */
88 struct bridge_mcast_stats
{
89 struct br_mcast_stats mstats
;
90 struct u64_stats_sync syncp
;
94 struct br_vlan_stats
{
99 struct u64_stats_sync syncp
;
102 struct br_tunnel_info
{
104 struct metadata_dst
*tunnel_dst
;
107 /* private vlan flags */
109 BR_VLFLAG_PER_PORT_STATS
= BIT(0),
110 BR_VLFLAG_ADDED_BY_SWITCHDEV
= BIT(1),
114 * struct net_bridge_vlan - per-vlan entry
116 * @vnode: rhashtable member
118 * @flags: bridge vlan flags
119 * @priv_flags: private (in-kernel) bridge vlan flags
120 * @stats: per-cpu VLAN statistics
121 * @br: if MASTER flag set, this points to a bridge struct
122 * @port: if MASTER flag unset, this points to a port struct
123 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
124 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
125 * for this VLAN entry
126 * @vlist: sorted list of VLAN entries
127 * @rcu: used for entry destruction
129 * This structure is shared between the global per-VLAN entries contained in
130 * the bridge rhashtable and the local per-port per-VLAN entries contained in
131 * the port's rhashtable. The union entries should be interpreted depending on
132 * the entry flags that are set.
134 struct net_bridge_vlan
{
135 struct rhash_head vnode
;
136 struct rhash_head tnode
;
140 struct br_vlan_stats __percpu
*stats
;
142 struct net_bridge
*br
;
143 struct net_bridge_port
*port
;
147 struct net_bridge_vlan
*brvlan
;
150 struct br_tunnel_info tinfo
;
152 struct list_head vlist
;
158 * struct net_bridge_vlan_group
160 * @vlan_hash: VLAN entry rhashtable
161 * @vlan_list: sorted VLAN entry list
162 * @num_vlans: number of total VLAN entries
163 * @pvid: PVID VLAN id
165 * IMPORTANT: Be careful when checking if there're VLAN entries using list
166 * primitives because the bridge can have entries in its list which
167 * are just for global context but not for filtering, i.e. they have
168 * the master flag set but not the brentry flag. If you have to check
169 * if there're "real" entries in the bridge please test @num_vlans
171 struct net_bridge_vlan_group
{
172 struct rhashtable vlan_hash
;
173 struct rhashtable tunnel_hash
;
174 struct list_head vlan_list
;
179 struct net_bridge_fdb_key
{
184 struct net_bridge_fdb_entry
{
185 struct rhash_head rhnode
;
186 struct net_bridge_port
*dst
;
188 struct net_bridge_fdb_key key
;
189 struct hlist_node fdb_node
;
190 unsigned char is_local
:1,
194 added_by_external_learn
:1,
197 /* write-heavy members should not affect lookups */
198 unsigned long updated ____cacheline_aligned_in_smp
;
204 #define MDB_PG_FLAGS_PERMANENT BIT(0)
205 #define MDB_PG_FLAGS_OFFLOAD BIT(1)
207 struct net_bridge_port_group
{
208 struct net_bridge_port
*port
;
209 struct net_bridge_port_group __rcu
*next
;
210 struct hlist_node mglist
;
212 struct timer_list timer
;
215 unsigned char eth_addr
[ETH_ALEN
];
218 struct net_bridge_mdb_entry
{
219 struct rhash_head rhnode
;
220 struct net_bridge
*br
;
221 struct net_bridge_port_group __rcu
*ports
;
223 struct timer_list timer
;
226 struct hlist_node mdb_node
;
229 struct net_bridge_port
{
230 struct net_bridge
*br
;
231 struct net_device
*dev
;
232 struct list_head list
;
235 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
236 struct net_bridge_vlan_group __rcu
*vlgrp
;
238 struct net_bridge_port __rcu
*backup_port
;
244 unsigned char topology_change_ack
;
245 unsigned char config_pending
;
247 port_id designated_port
;
248 bridge_id designated_root
;
249 bridge_id designated_bridge
;
252 unsigned long designated_age
;
254 struct timer_list forward_delay_timer
;
255 struct timer_list hold_timer
;
256 struct timer_list message_age_timer
;
260 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
261 struct bridge_mcast_own_query ip4_own_query
;
262 #if IS_ENABLED(CONFIG_IPV6)
263 struct bridge_mcast_own_query ip6_own_query
;
264 #endif /* IS_ENABLED(CONFIG_IPV6) */
265 unsigned char multicast_router
;
266 struct bridge_mcast_stats __percpu
*mcast_stats
;
267 struct timer_list multicast_router_timer
;
268 struct hlist_head mglist
;
269 struct hlist_node rlist
;
273 char sysfs_name
[IFNAMSIZ
];
276 #ifdef CONFIG_NET_POLL_CONTROLLER
279 #ifdef CONFIG_NET_SWITCHDEV
280 int offload_fwd_mark
;
283 u16 backup_redirected_cnt
;
286 #define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
288 #define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
289 #define br_promisc_port(p) ((p)->flags & BR_PROMISC)
291 static inline struct net_bridge_port
*br_port_get_rcu(const struct net_device
*dev
)
293 return rcu_dereference(dev
->rx_handler_data
);
296 static inline struct net_bridge_port
*br_port_get_rtnl(const struct net_device
*dev
)
298 return netif_is_bridge_port(dev
) ?
299 rtnl_dereference(dev
->rx_handler_data
) : NULL
;
302 static inline struct net_bridge_port
*br_port_get_rtnl_rcu(const struct net_device
*dev
)
304 return netif_is_bridge_port(dev
) ?
305 rcu_dereference_rtnl(dev
->rx_handler_data
) : NULL
;
308 enum net_bridge_opts
{
310 BROPT_VLAN_STATS_ENABLED
,
311 BROPT_NF_CALL_IPTABLES
,
312 BROPT_NF_CALL_IP6TABLES
,
313 BROPT_NF_CALL_ARPTABLES
,
314 BROPT_GROUP_ADDR_SET
,
315 BROPT_MULTICAST_ENABLED
,
316 BROPT_MULTICAST_QUERIER
,
317 BROPT_MULTICAST_QUERY_USE_IFADDR
,
318 BROPT_MULTICAST_STATS_ENABLED
,
320 BROPT_NEIGH_SUPPRESS_ENABLED
,
321 BROPT_MTU_SET_BY_USER
,
322 BROPT_VLAN_STATS_PER_PORT
,
324 BROPT_VLAN_BRIDGE_BINDING
,
329 spinlock_t hash_lock
;
330 struct list_head port_list
;
331 struct net_device
*dev
;
332 struct pcpu_sw_netstats __percpu
*stats
;
333 unsigned long options
;
334 /* These fields are accessed on each packet */
335 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
338 struct net_bridge_vlan_group __rcu
*vlgrp
;
341 struct rhashtable fdb_hash_tbl
;
342 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
344 struct rtable fake_rtable
;
345 struct rt6_info fake_rt6_info
;
349 u16 group_fwd_mask_required
;
352 bridge_id designated_root
;
354 unsigned char topology_change
;
355 unsigned char topology_change_detected
;
357 unsigned long max_age
;
358 unsigned long hello_time
;
359 unsigned long forward_delay
;
360 unsigned long ageing_time
;
361 unsigned long bridge_max_age
;
362 unsigned long bridge_hello_time
;
363 unsigned long bridge_forward_delay
;
364 unsigned long bridge_ageing_time
;
367 u8 group_addr
[ETH_ALEN
];
370 BR_NO_STP
, /* no spanning tree */
371 BR_KERNEL_STP
, /* old STP in kernel */
372 BR_USER_STP
, /* new RSTP in userspace */
375 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
379 u32 multicast_last_member_count
;
380 u32 multicast_startup_query_count
;
382 u8 multicast_igmp_version
;
384 #if IS_ENABLED(CONFIG_IPV6)
385 u8 multicast_mld_version
;
387 spinlock_t multicast_lock
;
388 unsigned long multicast_last_member_interval
;
389 unsigned long multicast_membership_interval
;
390 unsigned long multicast_querier_interval
;
391 unsigned long multicast_query_interval
;
392 unsigned long multicast_query_response_interval
;
393 unsigned long multicast_startup_query_interval
;
395 struct rhashtable mdb_hash_tbl
;
397 struct hlist_head mdb_list
;
398 struct hlist_head router_list
;
400 struct timer_list multicast_router_timer
;
401 struct bridge_mcast_other_query ip4_other_query
;
402 struct bridge_mcast_own_query ip4_own_query
;
403 struct bridge_mcast_querier ip4_querier
;
404 struct bridge_mcast_stats __percpu
*mcast_stats
;
405 #if IS_ENABLED(CONFIG_IPV6)
406 struct bridge_mcast_other_query ip6_other_query
;
407 struct bridge_mcast_own_query ip6_own_query
;
408 struct bridge_mcast_querier ip6_querier
;
409 #endif /* IS_ENABLED(CONFIG_IPV6) */
412 struct timer_list hello_timer
;
413 struct timer_list tcn_timer
;
414 struct timer_list topology_change_timer
;
415 struct delayed_work gc_work
;
416 struct kobject
*ifobj
;
419 #ifdef CONFIG_NET_SWITCHDEV
420 int offload_fwd_mark
;
422 struct hlist_head fdb_list
;
425 struct br_input_skb_cb
{
426 struct net_device
*brdev
;
428 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
432 u8 proxyarp_replied
:1;
433 u8 src_port_isolated
:1;
434 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
437 #ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
438 u8 br_netfilter_broute
:1;
441 #ifdef CONFIG_NET_SWITCHDEV
442 int offload_fwd_mark
;
446 #define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
448 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
449 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
451 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
454 #define br_printk(level, br, format, args...) \
455 printk(level "%s: " format, (br)->dev->name, ##args)
457 #define br_err(__br, format, args...) \
458 br_printk(KERN_ERR, __br, format, ##args)
459 #define br_warn(__br, format, args...) \
460 br_printk(KERN_WARNING, __br, format, ##args)
461 #define br_notice(__br, format, args...) \
462 br_printk(KERN_NOTICE, __br, format, ##args)
463 #define br_info(__br, format, args...) \
464 br_printk(KERN_INFO, __br, format, ##args)
466 #define br_debug(br, format, args...) \
467 pr_debug("%s: " format, (br)->dev->name, ##args)
469 /* called under bridge lock */
470 static inline int br_is_root_bridge(const struct net_bridge
*br
)
472 return !memcmp(&br
->bridge_id
, &br
->designated_root
, 8);
475 /* check if a VLAN entry is global */
476 static inline bool br_vlan_is_master(const struct net_bridge_vlan
*v
)
478 return v
->flags
& BRIDGE_VLAN_INFO_MASTER
;
481 /* check if a VLAN entry is used by the bridge */
482 static inline bool br_vlan_is_brentry(const struct net_bridge_vlan
*v
)
484 return v
->flags
& BRIDGE_VLAN_INFO_BRENTRY
;
487 /* check if we should use the vlan entry, returns false if it's only context */
488 static inline bool br_vlan_should_use(const struct net_bridge_vlan
*v
)
490 if (br_vlan_is_master(v
)) {
491 if (br_vlan_is_brentry(v
))
500 static inline int br_opt_get(const struct net_bridge
*br
,
501 enum net_bridge_opts opt
)
503 return test_bit(opt
, &br
->options
);
506 int br_boolopt_toggle(struct net_bridge
*br
, enum br_boolopt_id opt
, bool on
,
507 struct netlink_ext_ack
*extack
);
508 int br_boolopt_get(const struct net_bridge
*br
, enum br_boolopt_id opt
);
509 int br_boolopt_multi_toggle(struct net_bridge
*br
,
510 struct br_boolopt_multi
*bm
,
511 struct netlink_ext_ack
*extack
);
512 void br_boolopt_multi_get(const struct net_bridge
*br
,
513 struct br_boolopt_multi
*bm
);
514 void br_opt_toggle(struct net_bridge
*br
, enum net_bridge_opts opt
, bool on
);
517 void br_dev_setup(struct net_device
*dev
);
518 void br_dev_delete(struct net_device
*dev
, struct list_head
*list
);
519 netdev_tx_t
br_dev_xmit(struct sk_buff
*skb
, struct net_device
*dev
);
520 #ifdef CONFIG_NET_POLL_CONTROLLER
521 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
524 struct netpoll
*np
= p
->np
;
527 netpoll_send_skb(np
, skb
);
530 int br_netpoll_enable(struct net_bridge_port
*p
);
531 void br_netpoll_disable(struct net_bridge_port
*p
);
533 static inline void br_netpoll_send_skb(const struct net_bridge_port
*p
,
538 static inline int br_netpoll_enable(struct net_bridge_port
*p
)
543 static inline void br_netpoll_disable(struct net_bridge_port
*p
)
549 int br_fdb_init(void);
550 void br_fdb_fini(void);
551 int br_fdb_hash_init(struct net_bridge
*br
);
552 void br_fdb_hash_fini(struct net_bridge
*br
);
553 void br_fdb_flush(struct net_bridge
*br
);
554 void br_fdb_find_delete_local(struct net_bridge
*br
,
555 const struct net_bridge_port
*p
,
556 const unsigned char *addr
, u16 vid
);
557 void br_fdb_changeaddr(struct net_bridge_port
*p
, const unsigned char *newaddr
);
558 void br_fdb_change_mac_address(struct net_bridge
*br
, const u8
*newaddr
);
559 void br_fdb_cleanup(struct work_struct
*work
);
560 void br_fdb_delete_by_port(struct net_bridge
*br
,
561 const struct net_bridge_port
*p
, u16 vid
, int do_all
);
562 struct net_bridge_fdb_entry
*br_fdb_find_rcu(struct net_bridge
*br
,
563 const unsigned char *addr
,
565 int br_fdb_test_addr(struct net_device
*dev
, unsigned char *addr
);
566 int br_fdb_fillbuf(struct net_bridge
*br
, void *buf
, unsigned long count
,
568 int br_fdb_insert(struct net_bridge
*br
, struct net_bridge_port
*source
,
569 const unsigned char *addr
, u16 vid
);
570 void br_fdb_update(struct net_bridge
*br
, struct net_bridge_port
*source
,
571 const unsigned char *addr
, u16 vid
, bool added_by_user
);
573 int br_fdb_delete(struct ndmsg
*ndm
, struct nlattr
*tb
[],
574 struct net_device
*dev
, const unsigned char *addr
, u16 vid
);
575 int br_fdb_add(struct ndmsg
*nlh
, struct nlattr
*tb
[], struct net_device
*dev
,
576 const unsigned char *addr
, u16 vid
, u16 nlh_flags
,
577 struct netlink_ext_ack
*extack
);
578 int br_fdb_dump(struct sk_buff
*skb
, struct netlink_callback
*cb
,
579 struct net_device
*dev
, struct net_device
*fdev
, int *idx
);
580 int br_fdb_get(struct sk_buff
*skb
, struct nlattr
*tb
[], struct net_device
*dev
,
581 const unsigned char *addr
, u16 vid
, u32 portid
, u32 seq
,
582 struct netlink_ext_ack
*extack
);
583 int br_fdb_sync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
584 void br_fdb_unsync_static(struct net_bridge
*br
, struct net_bridge_port
*p
);
585 int br_fdb_external_learn_add(struct net_bridge
*br
, struct net_bridge_port
*p
,
586 const unsigned char *addr
, u16 vid
,
588 int br_fdb_external_learn_del(struct net_bridge
*br
, struct net_bridge_port
*p
,
589 const unsigned char *addr
, u16 vid
,
591 void br_fdb_offloaded_set(struct net_bridge
*br
, struct net_bridge_port
*p
,
592 const unsigned char *addr
, u16 vid
, bool offloaded
);
600 int br_dev_queue_push_xmit(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
601 void br_forward(const struct net_bridge_port
*to
, struct sk_buff
*skb
,
602 bool local_rcv
, bool local_orig
);
603 int br_forward_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
604 void br_flood(struct net_bridge
*br
, struct sk_buff
*skb
,
605 enum br_pkt_type pkt_type
, bool local_rcv
, bool local_orig
);
607 /* return true if both source port and dest port are isolated */
608 static inline bool br_skb_isolated(const struct net_bridge_port
*to
,
609 const struct sk_buff
*skb
)
611 return BR_INPUT_SKB_CB(skb
)->src_port_isolated
&&
612 (to
->flags
& BR_ISOLATED
);
616 void br_port_carrier_check(struct net_bridge_port
*p
, bool *notified
);
617 int br_add_bridge(struct net
*net
, const char *name
);
618 int br_del_bridge(struct net
*net
, const char *name
);
619 int br_add_if(struct net_bridge
*br
, struct net_device
*dev
,
620 struct netlink_ext_ack
*extack
);
621 int br_del_if(struct net_bridge
*br
, struct net_device
*dev
);
622 void br_mtu_auto_adjust(struct net_bridge
*br
);
623 netdev_features_t
br_features_recompute(struct net_bridge
*br
,
624 netdev_features_t features
);
625 void br_port_flags_change(struct net_bridge_port
*port
, unsigned long mask
);
626 void br_manage_promisc(struct net_bridge
*br
);
627 int nbp_backup_change(struct net_bridge_port
*p
, struct net_device
*backup_dev
);
630 int br_handle_frame_finish(struct net
*net
, struct sock
*sk
, struct sk_buff
*skb
);
631 rx_handler_result_t
br_handle_frame(struct sk_buff
**pskb
);
633 static inline bool br_rx_handler_check_rcu(const struct net_device
*dev
)
635 return rcu_dereference(dev
->rx_handler
) == br_handle_frame
;
638 static inline bool br_rx_handler_check_rtnl(const struct net_device
*dev
)
640 return rcu_dereference_rtnl(dev
->rx_handler
) == br_handle_frame
;
643 static inline struct net_bridge_port
*br_port_get_check_rcu(const struct net_device
*dev
)
645 return br_rx_handler_check_rcu(dev
) ? br_port_get_rcu(dev
) : NULL
;
648 static inline struct net_bridge_port
*
649 br_port_get_check_rtnl(const struct net_device
*dev
)
651 return br_rx_handler_check_rtnl(dev
) ? br_port_get_rtnl_rcu(dev
) : NULL
;
655 int br_dev_ioctl(struct net_device
*dev
, struct ifreq
*rq
, int cmd
);
656 int br_ioctl_deviceless_stub(struct net
*net
, unsigned int cmd
,
660 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
661 int br_multicast_rcv(struct net_bridge
*br
, struct net_bridge_port
*port
,
662 struct sk_buff
*skb
, u16 vid
);
663 struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
664 struct sk_buff
*skb
, u16 vid
);
665 int br_multicast_add_port(struct net_bridge_port
*port
);
666 void br_multicast_del_port(struct net_bridge_port
*port
);
667 void br_multicast_enable_port(struct net_bridge_port
*port
);
668 void br_multicast_disable_port(struct net_bridge_port
*port
);
669 void br_multicast_init(struct net_bridge
*br
);
670 void br_multicast_open(struct net_bridge
*br
);
671 void br_multicast_stop(struct net_bridge
*br
);
672 void br_multicast_dev_del(struct net_bridge
*br
);
673 void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
674 struct sk_buff
*skb
, bool local_rcv
, bool local_orig
);
675 int br_multicast_set_router(struct net_bridge
*br
, unsigned long val
);
676 int br_multicast_set_port_router(struct net_bridge_port
*p
, unsigned long val
);
677 int br_multicast_toggle(struct net_bridge
*br
, unsigned long val
);
678 int br_multicast_set_querier(struct net_bridge
*br
, unsigned long val
);
679 int br_multicast_set_hash_max(struct net_bridge
*br
, unsigned long val
);
680 int br_multicast_set_igmp_version(struct net_bridge
*br
, unsigned long val
);
681 #if IS_ENABLED(CONFIG_IPV6)
682 int br_multicast_set_mld_version(struct net_bridge
*br
, unsigned long val
);
684 struct net_bridge_mdb_entry
*
685 br_mdb_ip_get(struct net_bridge
*br
, struct br_ip
*dst
);
686 struct net_bridge_mdb_entry
*
687 br_multicast_new_group(struct net_bridge
*br
, struct br_ip
*group
);
688 struct net_bridge_port_group
*
689 br_multicast_new_port_group(struct net_bridge_port
*port
, struct br_ip
*group
,
690 struct net_bridge_port_group __rcu
*next
,
691 unsigned char flags
, const unsigned char *src
);
692 int br_mdb_hash_init(struct net_bridge
*br
);
693 void br_mdb_hash_fini(struct net_bridge
*br
);
694 void br_mdb_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
695 struct br_ip
*group
, int type
, u8 flags
);
696 void br_rtr_notify(struct net_device
*dev
, struct net_bridge_port
*port
,
698 void br_multicast_count(struct net_bridge
*br
, const struct net_bridge_port
*p
,
699 const struct sk_buff
*skb
, u8 type
, u8 dir
);
700 int br_multicast_init_stats(struct net_bridge
*br
);
701 void br_multicast_uninit_stats(struct net_bridge
*br
);
702 void br_multicast_get_stats(const struct net_bridge
*br
,
703 const struct net_bridge_port
*p
,
704 struct br_mcast_stats
*dest
);
705 void br_mdb_init(void);
706 void br_mdb_uninit(void);
708 #define mlock_dereference(X, br) \
709 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
711 static inline bool br_multicast_is_router(struct net_bridge
*br
)
713 return br
->multicast_router
== 2 ||
714 (br
->multicast_router
== 1 &&
715 timer_pending(&br
->multicast_router_timer
));
719 __br_multicast_querier_exists(struct net_bridge
*br
,
720 struct bridge_mcast_other_query
*querier
,
723 bool own_querier_enabled
;
725 if (br_opt_get(br
, BROPT_MULTICAST_QUERIER
)) {
726 if (is_ipv6
&& !br_opt_get(br
, BROPT_HAS_IPV6_ADDR
))
727 own_querier_enabled
= false;
729 own_querier_enabled
= true;
731 own_querier_enabled
= false;
734 return time_is_before_jiffies(querier
->delay_time
) &&
735 (own_querier_enabled
|| timer_pending(&querier
->timer
));
738 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
741 switch (eth
->h_proto
) {
742 case (htons(ETH_P_IP
)):
743 return __br_multicast_querier_exists(br
,
744 &br
->ip4_other_query
, false);
745 #if IS_ENABLED(CONFIG_IPV6)
746 case (htons(ETH_P_IPV6
)):
747 return __br_multicast_querier_exists(br
,
748 &br
->ip6_other_query
, true);
755 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
757 return BR_INPUT_SKB_CB(skb
)->igmp
;
760 static inline int br_multicast_rcv(struct net_bridge
*br
,
761 struct net_bridge_port
*port
,
768 static inline struct net_bridge_mdb_entry
*br_mdb_get(struct net_bridge
*br
,
769 struct sk_buff
*skb
, u16 vid
)
774 static inline int br_multicast_add_port(struct net_bridge_port
*port
)
779 static inline void br_multicast_del_port(struct net_bridge_port
*port
)
783 static inline void br_multicast_enable_port(struct net_bridge_port
*port
)
787 static inline void br_multicast_disable_port(struct net_bridge_port
*port
)
791 static inline void br_multicast_init(struct net_bridge
*br
)
795 static inline void br_multicast_open(struct net_bridge
*br
)
799 static inline void br_multicast_stop(struct net_bridge
*br
)
803 static inline void br_multicast_dev_del(struct net_bridge
*br
)
807 static inline void br_multicast_flood(struct net_bridge_mdb_entry
*mdst
,
809 bool local_rcv
, bool local_orig
)
813 static inline bool br_multicast_is_router(struct net_bridge
*br
)
818 static inline bool br_multicast_querier_exists(struct net_bridge
*br
,
824 static inline void br_mdb_init(void)
828 static inline void br_mdb_uninit(void)
832 static inline int br_mdb_hash_init(struct net_bridge
*br
)
837 static inline void br_mdb_hash_fini(struct net_bridge
*br
)
841 static inline void br_multicast_count(struct net_bridge
*br
,
842 const struct net_bridge_port
*p
,
843 const struct sk_buff
*skb
,
848 static inline int br_multicast_init_stats(struct net_bridge
*br
)
853 static inline void br_multicast_uninit_stats(struct net_bridge
*br
)
857 static inline int br_multicast_igmp_type(const struct sk_buff
*skb
)
864 #ifdef CONFIG_BRIDGE_VLAN_FILTERING
865 bool br_allowed_ingress(const struct net_bridge
*br
,
866 struct net_bridge_vlan_group
*vg
, struct sk_buff
*skb
,
868 bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
869 const struct sk_buff
*skb
);
870 bool br_should_learn(struct net_bridge_port
*p
, struct sk_buff
*skb
, u16
*vid
);
871 struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
872 const struct net_bridge_port
*port
,
873 struct net_bridge_vlan_group
*vg
,
874 struct sk_buff
*skb
);
875 int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
876 bool *changed
, struct netlink_ext_ack
*extack
);
877 int br_vlan_delete(struct net_bridge
*br
, u16 vid
);
878 void br_vlan_flush(struct net_bridge
*br
);
879 struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
, u16 vid
);
880 void br_recalculate_fwd_mask(struct net_bridge
*br
);
881 int __br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
882 int br_vlan_filter_toggle(struct net_bridge
*br
, unsigned long val
);
883 int __br_vlan_set_proto(struct net_bridge
*br
, __be16 proto
);
884 int br_vlan_set_proto(struct net_bridge
*br
, unsigned long val
);
885 int br_vlan_set_stats(struct net_bridge
*br
, unsigned long val
);
886 int br_vlan_set_stats_per_port(struct net_bridge
*br
, unsigned long val
);
887 int br_vlan_init(struct net_bridge
*br
);
888 int br_vlan_set_default_pvid(struct net_bridge
*br
, unsigned long val
);
889 int __br_vlan_set_default_pvid(struct net_bridge
*br
, u16 pvid
,
890 struct netlink_ext_ack
*extack
);
891 int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
892 bool *changed
, struct netlink_ext_ack
*extack
);
893 int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
);
894 void nbp_vlan_flush(struct net_bridge_port
*port
);
895 int nbp_vlan_init(struct net_bridge_port
*port
, struct netlink_ext_ack
*extack
);
896 int nbp_get_num_vlan_infos(struct net_bridge_port
*p
, u32 filter_mask
);
897 void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
898 struct br_vlan_stats
*stats
);
899 void br_vlan_port_event(struct net_bridge_port
*p
, unsigned long event
);
900 void br_vlan_bridge_event(struct net_device
*dev
, unsigned long event
,
903 static inline struct net_bridge_vlan_group
*br_vlan_group(
904 const struct net_bridge
*br
)
906 return rtnl_dereference(br
->vlgrp
);
909 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
910 const struct net_bridge_port
*p
)
912 return rtnl_dereference(p
->vlgrp
);
915 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
916 const struct net_bridge
*br
)
918 return rcu_dereference(br
->vlgrp
);
921 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
922 const struct net_bridge_port
*p
)
924 return rcu_dereference(p
->vlgrp
);
927 /* Since bridge now depends on 8021Q module, but the time bridge sees the
928 * skb, the vlan tag will always be present if the frame was tagged.
930 static inline int br_vlan_get_tag(const struct sk_buff
*skb
, u16
*vid
)
934 if (skb_vlan_tag_present(skb
)) {
935 *vid
= skb_vlan_tag_get_id(skb
);
944 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
954 static inline bool br_allowed_ingress(const struct net_bridge
*br
,
955 struct net_bridge_vlan_group
*vg
,
962 static inline bool br_allowed_egress(struct net_bridge_vlan_group
*vg
,
963 const struct sk_buff
*skb
)
968 static inline bool br_should_learn(struct net_bridge_port
*p
,
969 struct sk_buff
*skb
, u16
*vid
)
974 static inline struct sk_buff
*br_handle_vlan(struct net_bridge
*br
,
975 const struct net_bridge_port
*port
,
976 struct net_bridge_vlan_group
*vg
,
982 static inline int br_vlan_add(struct net_bridge
*br
, u16 vid
, u16 flags
,
983 bool *changed
, struct netlink_ext_ack
*extack
)
989 static inline int br_vlan_delete(struct net_bridge
*br
, u16 vid
)
994 static inline void br_vlan_flush(struct net_bridge
*br
)
998 static inline void br_recalculate_fwd_mask(struct net_bridge
*br
)
1002 static inline int br_vlan_init(struct net_bridge
*br
)
1007 static inline int nbp_vlan_add(struct net_bridge_port
*port
, u16 vid
, u16 flags
,
1008 bool *changed
, struct netlink_ext_ack
*extack
)
1014 static inline int nbp_vlan_delete(struct net_bridge_port
*port
, u16 vid
)
1019 static inline void nbp_vlan_flush(struct net_bridge_port
*port
)
1023 static inline struct net_bridge_vlan
*br_vlan_find(struct net_bridge_vlan_group
*vg
,
1029 static inline int nbp_vlan_init(struct net_bridge_port
*port
,
1030 struct netlink_ext_ack
*extack
)
1035 static inline u16
br_vlan_get_tag(const struct sk_buff
*skb
, u16
*tag
)
1040 static inline u16
br_get_pvid(const struct net_bridge_vlan_group
*vg
)
1045 static inline int __br_vlan_filter_toggle(struct net_bridge
*br
,
1051 static inline int nbp_get_num_vlan_infos(struct net_bridge_port
*p
,
1057 static inline struct net_bridge_vlan_group
*br_vlan_group(
1058 const struct net_bridge
*br
)
1063 static inline struct net_bridge_vlan_group
*nbp_vlan_group(
1064 const struct net_bridge_port
*p
)
1069 static inline struct net_bridge_vlan_group
*br_vlan_group_rcu(
1070 const struct net_bridge
*br
)
1075 static inline struct net_bridge_vlan_group
*nbp_vlan_group_rcu(
1076 const struct net_bridge_port
*p
)
1081 static inline void br_vlan_get_stats(const struct net_bridge_vlan
*v
,
1082 struct br_vlan_stats
*stats
)
1086 static inline void br_vlan_port_event(struct net_bridge_port
*p
,
1087 unsigned long event
)
1091 static inline void br_vlan_bridge_event(struct net_device
*dev
,
1092 unsigned long event
, void *ptr
)
1098 int (*br_dev_xmit_hook
)(struct sk_buff
*skb
);
1100 extern const struct nf_br_ops __rcu
*nf_br_ops
;
1102 /* br_netfilter.c */
1103 #if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1104 int br_nf_core_init(void);
1105 void br_nf_core_fini(void);
1106 void br_netfilter_rtable_init(struct net_bridge
*);
1108 static inline int br_nf_core_init(void) { return 0; }
1109 static inline void br_nf_core_fini(void) {}
1110 #define br_netfilter_rtable_init(x)
1114 void br_set_state(struct net_bridge_port
*p
, unsigned int state
);
1115 struct net_bridge_port
*br_get_port(struct net_bridge
*br
, u16 port_no
);
1116 void br_init_port(struct net_bridge_port
*p
);
1117 void br_become_designated_port(struct net_bridge_port
*p
);
1119 void __br_set_forward_delay(struct net_bridge
*br
, unsigned long t
);
1120 int br_set_forward_delay(struct net_bridge
*br
, unsigned long x
);
1121 int br_set_hello_time(struct net_bridge
*br
, unsigned long x
);
1122 int br_set_max_age(struct net_bridge
*br
, unsigned long x
);
1123 int __set_ageing_time(struct net_device
*dev
, unsigned long t
);
1124 int br_set_ageing_time(struct net_bridge
*br
, clock_t ageing_time
);
1128 void br_stp_enable_bridge(struct net_bridge
*br
);
1129 void br_stp_disable_bridge(struct net_bridge
*br
);
1130 void br_stp_set_enabled(struct net_bridge
*br
, unsigned long val
);
1131 void br_stp_enable_port(struct net_bridge_port
*p
);
1132 void br_stp_disable_port(struct net_bridge_port
*p
);
1133 bool br_stp_recalculate_bridge_id(struct net_bridge
*br
);
1134 void br_stp_change_bridge_id(struct net_bridge
*br
, const unsigned char *a
);
1135 void br_stp_set_bridge_priority(struct net_bridge
*br
, u16 newprio
);
1136 int br_stp_set_port_priority(struct net_bridge_port
*p
, unsigned long newprio
);
1137 int br_stp_set_path_cost(struct net_bridge_port
*p
, unsigned long path_cost
);
1138 ssize_t
br_show_bridge_id(char *buf
, const struct bridge_id
*id
);
1142 void br_stp_rcv(const struct stp_proto
*proto
, struct sk_buff
*skb
,
1143 struct net_device
*dev
);
1145 /* br_stp_timer.c */
1146 void br_stp_timer_init(struct net_bridge
*br
);
1147 void br_stp_port_timer_init(struct net_bridge_port
*p
);
1148 unsigned long br_timer_value(const struct timer_list
*timer
);
1151 #if IS_ENABLED(CONFIG_ATM_LANE)
1152 extern int (*br_fdb_test_addr_hook
)(struct net_device
*dev
, unsigned char *addr
);
1156 extern struct rtnl_link_ops br_link_ops
;
1157 int br_netlink_init(void);
1158 void br_netlink_fini(void);
1159 void br_ifinfo_notify(int event
, const struct net_bridge
*br
,
1160 const struct net_bridge_port
*port
);
1161 int br_setlink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
,
1162 struct netlink_ext_ack
*extack
);
1163 int br_dellink(struct net_device
*dev
, struct nlmsghdr
*nlmsg
, u16 flags
);
1164 int br_getlink(struct sk_buff
*skb
, u32 pid
, u32 seq
, struct net_device
*dev
,
1165 u32 filter_mask
, int nlflags
);
1169 extern const struct sysfs_ops brport_sysfs_ops
;
1170 int br_sysfs_addif(struct net_bridge_port
*p
);
1171 int br_sysfs_renameif(struct net_bridge_port
*p
);
1174 int br_sysfs_addbr(struct net_device
*dev
);
1175 void br_sysfs_delbr(struct net_device
*dev
);
1179 static inline int br_sysfs_addif(struct net_bridge_port
*p
) { return 0; }
1180 static inline int br_sysfs_renameif(struct net_bridge_port
*p
) { return 0; }
1181 static inline int br_sysfs_addbr(struct net_device
*dev
) { return 0; }
1182 static inline void br_sysfs_delbr(struct net_device
*dev
) { return; }
1183 #endif /* CONFIG_SYSFS */
1185 /* br_switchdev.c */
1186 #ifdef CONFIG_NET_SWITCHDEV
1187 int nbp_switchdev_mark_set(struct net_bridge_port
*p
);
1188 void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1189 struct sk_buff
*skb
);
1190 bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1191 const struct sk_buff
*skb
);
1192 int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1193 unsigned long flags
,
1194 unsigned long mask
);
1195 void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
,
1197 int br_switchdev_port_vlan_add(struct net_device
*dev
, u16 vid
, u16 flags
,
1198 struct netlink_ext_ack
*extack
);
1199 int br_switchdev_port_vlan_del(struct net_device
*dev
, u16 vid
);
1201 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1203 skb
->offload_fwd_mark
= 0;
1206 static inline int nbp_switchdev_mark_set(struct net_bridge_port
*p
)
1211 static inline void nbp_switchdev_frame_mark(const struct net_bridge_port
*p
,
1212 struct sk_buff
*skb
)
1216 static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port
*p
,
1217 const struct sk_buff
*skb
)
1222 static inline int br_switchdev_set_port_flag(struct net_bridge_port
*p
,
1223 unsigned long flags
,
1229 static inline int br_switchdev_port_vlan_add(struct net_device
*dev
,
1231 struct netlink_ext_ack
*extack
)
1236 static inline int br_switchdev_port_vlan_del(struct net_device
*dev
, u16 vid
)
1242 br_switchdev_fdb_notify(const struct net_bridge_fdb_entry
*fdb
, int type
)
1246 static inline void br_switchdev_frame_unmark(struct sk_buff
*skb
)
1249 #endif /* CONFIG_NET_SWITCHDEV */
1251 /* br_arp_nd_proxy.c */
1252 void br_recalculate_neigh_suppress_enabled(struct net_bridge
*br
);
1253 void br_do_proxy_suppress_arp(struct sk_buff
*skb
, struct net_bridge
*br
,
1254 u16 vid
, struct net_bridge_port
*p
);
1255 void br_do_suppress_nd(struct sk_buff
*skb
, struct net_bridge
*br
,
1256 u16 vid
, struct net_bridge_port
*p
, struct nd_msg
*msg
);
1257 struct nd_msg
*br_is_nd_neigh_msg(struct sk_buff
*skb
, struct nd_msg
*m
);