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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
7 */
8
9#ifndef _BR_PRIVATE_H
10#define _BR_PRIVATE_H
11
12#include <linux/netdevice.h>
13#include <linux/if_bridge.h>
14#include <linux/netpoll.h>
15#include <linux/u64_stats_sync.h>
16#include <net/route.h>
17#include <net/ip6_fib.h>
18#include <linux/if_vlan.h>
19#include <linux/rhashtable.h>
20#include <linux/refcount.h>
21
22#define BR_HASH_BITS 8
23#define BR_HASH_SIZE (1 << BR_HASH_BITS)
24
25#define BR_HOLD_TIME (1*HZ)
26
27#define BR_PORT_BITS 10
28#define BR_MAX_PORTS (1<<BR_PORT_BITS)
29
30#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
31
32#define BR_VERSION "2.3"
33
34/* Control of forwarding link local multicast */
35#define BR_GROUPFWD_DEFAULT 0
36/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
37enum {
38 BR_GROUPFWD_STP = BIT(0),
39 BR_GROUPFWD_MACPAUSE = BIT(1),
40 BR_GROUPFWD_LACP = BIT(2),
41};
42
43#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
44 BR_GROUPFWD_LACP)
45/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
46#define BR_GROUPFWD_8021AD 0xB801u
47
48/* Path to usermode spanning tree program */
49#define BR_STP_PROG "/sbin/bridge-stp"
50
51typedef struct bridge_id bridge_id;
52typedef struct mac_addr mac_addr;
53typedef __u16 port_id;
54
55struct bridge_id {
56 unsigned char prio[2];
57 unsigned char addr[ETH_ALEN];
58};
59
60struct mac_addr {
61 unsigned char addr[ETH_ALEN];
62};
63
64#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
65/* our own querier */
66struct bridge_mcast_own_query {
67 struct timer_list timer;
68 u32 startup_sent;
69};
70
71/* other querier */
72struct bridge_mcast_other_query {
73 struct timer_list timer;
74 unsigned long delay_time;
75};
76
77/* selected querier */
78struct bridge_mcast_querier {
79 struct br_ip addr;
80 struct net_bridge_port __rcu *port;
81};
82
83/* IGMP/MLD statistics */
84struct bridge_mcast_stats {
85 struct br_mcast_stats mstats;
86 struct u64_stats_sync syncp;
87};
88#endif
89
90struct br_vlan_stats {
91 u64 rx_bytes;
92 u64 rx_packets;
93 u64 tx_bytes;
94 u64 tx_packets;
95 struct u64_stats_sync syncp;
96};
97
98struct br_tunnel_info {
99 __be64 tunnel_id;
100 struct metadata_dst *tunnel_dst;
101};
102
103/* private vlan flags */
104enum {
105 BR_VLFLAG_PER_PORT_STATS = BIT(0),
106 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
107};
108
109/**
110 * struct net_bridge_vlan - per-vlan entry
111 *
112 * @vnode: rhashtable member
113 * @vid: VLAN id
114 * @flags: bridge vlan flags
115 * @priv_flags: private (in-kernel) bridge vlan flags
116 * @stats: per-cpu VLAN statistics
117 * @br: if MASTER flag set, this points to a bridge struct
118 * @port: if MASTER flag unset, this points to a port struct
119 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
120 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
121 * for this VLAN entry
122 * @vlist: sorted list of VLAN entries
123 * @rcu: used for entry destruction
124 *
125 * This structure is shared between the global per-VLAN entries contained in
126 * the bridge rhashtable and the local per-port per-VLAN entries contained in
127 * the port's rhashtable. The union entries should be interpreted depending on
128 * the entry flags that are set.
129 */
130struct net_bridge_vlan {
131 struct rhash_head vnode;
132 struct rhash_head tnode;
133 u16 vid;
134 u16 flags;
135 u16 priv_flags;
136 struct br_vlan_stats __percpu *stats;
137 union {
138 struct net_bridge *br;
139 struct net_bridge_port *port;
140 };
141 union {
142 refcount_t refcnt;
143 struct net_bridge_vlan *brvlan;
144 };
145
146 struct br_tunnel_info tinfo;
147
148 struct list_head vlist;
149
150 struct rcu_head rcu;
151};
152
153/**
154 * struct net_bridge_vlan_group
155 *
156 * @vlan_hash: VLAN entry rhashtable
157 * @vlan_list: sorted VLAN entry list
158 * @num_vlans: number of total VLAN entries
159 * @pvid: PVID VLAN id
160 *
161 * IMPORTANT: Be careful when checking if there're VLAN entries using list
162 * primitives because the bridge can have entries in its list which
163 * are just for global context but not for filtering, i.e. they have
164 * the master flag set but not the brentry flag. If you have to check
165 * if there're "real" entries in the bridge please test @num_vlans
166 */
167struct net_bridge_vlan_group {
168 struct rhashtable vlan_hash;
169 struct rhashtable tunnel_hash;
170 struct list_head vlan_list;
171 u16 num_vlans;
172 u16 pvid;
173};
174
175struct net_bridge_fdb_key {
176 mac_addr addr;
177 u16 vlan_id;
178};
179
180struct net_bridge_fdb_entry {
181 struct rhash_head rhnode;
182 struct net_bridge_port *dst;
183
184 struct net_bridge_fdb_key key;
185 struct hlist_node fdb_node;
186 unsigned char is_local:1,
187 is_static:1,
188 is_sticky:1,
189 added_by_user:1,
190 added_by_external_learn:1,
191 offloaded:1;
192
193 /* write-heavy members should not affect lookups */
194 unsigned long updated ____cacheline_aligned_in_smp;
195 unsigned long used;
196
197 struct rcu_head rcu;
198};
199
200#define MDB_PG_FLAGS_PERMANENT BIT(0)
201#define MDB_PG_FLAGS_OFFLOAD BIT(1)
202#define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
203
204struct net_bridge_port_group {
205 struct net_bridge_port *port;
206 struct net_bridge_port_group __rcu *next;
207 struct hlist_node mglist;
208 struct rcu_head rcu;
209 struct timer_list timer;
210 struct br_ip addr;
211 unsigned char flags;
212 unsigned char eth_addr[ETH_ALEN];
213};
214
215struct net_bridge_mdb_entry {
216 struct rhash_head rhnode;
217 struct net_bridge *br;
218 struct net_bridge_port_group __rcu *ports;
219 struct rcu_head rcu;
220 struct timer_list timer;
221 struct br_ip addr;
222 bool host_joined;
223 struct hlist_node mdb_node;
224};
225
226struct net_bridge_port {
227 struct net_bridge *br;
228 struct net_device *dev;
229 struct list_head list;
230
231 unsigned long flags;
232#ifdef CONFIG_BRIDGE_VLAN_FILTERING
233 struct net_bridge_vlan_group __rcu *vlgrp;
234#endif
235 struct net_bridge_port __rcu *backup_port;
236
237 /* STP */
238 u8 priority;
239 u8 state;
240 u16 port_no;
241 unsigned char topology_change_ack;
242 unsigned char config_pending;
243 port_id port_id;
244 port_id designated_port;
245 bridge_id designated_root;
246 bridge_id designated_bridge;
247 u32 path_cost;
248 u32 designated_cost;
249 unsigned long designated_age;
250
251 struct timer_list forward_delay_timer;
252 struct timer_list hold_timer;
253 struct timer_list message_age_timer;
254 struct kobject kobj;
255 struct rcu_head rcu;
256
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;
267#endif
268
269#ifdef CONFIG_SYSFS
270 char sysfs_name[IFNAMSIZ];
271#endif
272
273#ifdef CONFIG_NET_POLL_CONTROLLER
274 struct netpoll *np;
275#endif
276#ifdef CONFIG_NET_SWITCHDEV
277 int offload_fwd_mark;
278#endif
279 u16 group_fwd_mask;
280 u16 backup_redirected_cnt;
281};
282
283#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
284
285#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
286#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
287
288static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
289{
290 return rcu_dereference(dev->rx_handler_data);
291}
292
293static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
294{
295 return netif_is_bridge_port(dev) ?
296 rtnl_dereference(dev->rx_handler_data) : NULL;
297}
298
299static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
300{
301 return netif_is_bridge_port(dev) ?
302 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
303}
304
305enum net_bridge_opts {
306 BROPT_VLAN_ENABLED,
307 BROPT_VLAN_STATS_ENABLED,
308 BROPT_NF_CALL_IPTABLES,
309 BROPT_NF_CALL_IP6TABLES,
310 BROPT_NF_CALL_ARPTABLES,
311 BROPT_GROUP_ADDR_SET,
312 BROPT_MULTICAST_ENABLED,
313 BROPT_MULTICAST_QUERIER,
314 BROPT_MULTICAST_QUERY_USE_IFADDR,
315 BROPT_MULTICAST_STATS_ENABLED,
316 BROPT_HAS_IPV6_ADDR,
317 BROPT_NEIGH_SUPPRESS_ENABLED,
318 BROPT_MTU_SET_BY_USER,
319 BROPT_VLAN_STATS_PER_PORT,
320 BROPT_NO_LL_LEARN,
321 BROPT_VLAN_BRIDGE_BINDING,
322};
323
324struct net_bridge {
325 spinlock_t lock;
326 spinlock_t hash_lock;
327 struct list_head port_list;
328 struct net_device *dev;
329 struct pcpu_sw_netstats __percpu *stats;
330 unsigned long options;
331 /* These fields are accessed on each packet */
332#ifdef CONFIG_BRIDGE_VLAN_FILTERING
333 __be16 vlan_proto;
334 u16 default_pvid;
335 struct net_bridge_vlan_group __rcu *vlgrp;
336#endif
337
338 struct rhashtable fdb_hash_tbl;
339#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
340 union {
341 struct rtable fake_rtable;
342 struct rt6_info fake_rt6_info;
343 };
344#endif
345 u16 group_fwd_mask;
346 u16 group_fwd_mask_required;
347
348 /* STP */
349 bridge_id designated_root;
350 bridge_id bridge_id;
351 unsigned char topology_change;
352 unsigned char topology_change_detected;
353 u16 root_port;
354 unsigned long max_age;
355 unsigned long hello_time;
356 unsigned long forward_delay;
357 unsigned long ageing_time;
358 unsigned long bridge_max_age;
359 unsigned long bridge_hello_time;
360 unsigned long bridge_forward_delay;
361 unsigned long bridge_ageing_time;
362 u32 root_path_cost;
363
364 u8 group_addr[ETH_ALEN];
365
366 enum {
367 BR_NO_STP, /* no spanning tree */
368 BR_KERNEL_STP, /* old STP in kernel */
369 BR_USER_STP, /* new RSTP in userspace */
370 } stp_enabled;
371
372#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
373
374 u32 hash_max;
375
376 u32 multicast_last_member_count;
377 u32 multicast_startup_query_count;
378
379 u8 multicast_igmp_version;
380 u8 multicast_router;
381#if IS_ENABLED(CONFIG_IPV6)
382 u8 multicast_mld_version;
383#endif
384 spinlock_t multicast_lock;
385 unsigned long multicast_last_member_interval;
386 unsigned long multicast_membership_interval;
387 unsigned long multicast_querier_interval;
388 unsigned long multicast_query_interval;
389 unsigned long multicast_query_response_interval;
390 unsigned long multicast_startup_query_interval;
391
392 struct rhashtable mdb_hash_tbl;
393
394 struct hlist_head mdb_list;
395 struct hlist_head router_list;
396
397 struct timer_list multicast_router_timer;
398 struct bridge_mcast_other_query ip4_other_query;
399 struct bridge_mcast_own_query ip4_own_query;
400 struct bridge_mcast_querier ip4_querier;
401 struct bridge_mcast_stats __percpu *mcast_stats;
402#if IS_ENABLED(CONFIG_IPV6)
403 struct bridge_mcast_other_query ip6_other_query;
404 struct bridge_mcast_own_query ip6_own_query;
405 struct bridge_mcast_querier ip6_querier;
406#endif /* IS_ENABLED(CONFIG_IPV6) */
407#endif
408
409 struct timer_list hello_timer;
410 struct timer_list tcn_timer;
411 struct timer_list topology_change_timer;
412 struct delayed_work gc_work;
413 struct kobject *ifobj;
414 u32 auto_cnt;
415
416#ifdef CONFIG_NET_SWITCHDEV
417 int offload_fwd_mark;
418#endif
419 struct hlist_head fdb_list;
420};
421
422struct br_input_skb_cb {
423 struct net_device *brdev;
424
425 u16 frag_max_size;
426#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
427 u8 igmp;
428 u8 mrouters_only:1;
429#endif
430 u8 proxyarp_replied:1;
431 u8 src_port_isolated:1;
432#ifdef CONFIG_BRIDGE_VLAN_FILTERING
433 u8 vlan_filtered:1;
434#endif
435#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
436 u8 br_netfilter_broute:1;
437#endif
438
439#ifdef CONFIG_NET_SWITCHDEV
440 int offload_fwd_mark;
441#endif
442};
443
444#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
445
446#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
447# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
448#else
449# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
450#endif
451
452#define br_printk(level, br, format, args...) \
453 printk(level "%s: " format, (br)->dev->name, ##args)
454
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)
463
464#define br_debug(br, format, args...) \
465 pr_debug("%s: " format, (br)->dev->name, ##args)
466
467/* called under bridge lock */
468static inline int br_is_root_bridge(const struct net_bridge *br)
469{
470 return !memcmp(&br->bridge_id, &br->designated_root, 8);
471}
472
473/* check if a VLAN entry is global */
474static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
475{
476 return v->flags & BRIDGE_VLAN_INFO_MASTER;
477}
478
479/* check if a VLAN entry is used by the bridge */
480static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
481{
482 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
483}
484
485/* check if we should use the vlan entry, returns false if it's only context */
486static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
487{
488 if (br_vlan_is_master(v)) {
489 if (br_vlan_is_brentry(v))
490 return true;
491 else
492 return false;
493 }
494
495 return true;
496}
497
498static inline int br_opt_get(const struct net_bridge *br,
499 enum net_bridge_opts opt)
500{
501 return test_bit(opt, &br->options);
502}
503
504int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
505 struct netlink_ext_ack *extack);
506int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
507int br_boolopt_multi_toggle(struct net_bridge *br,
508 struct br_boolopt_multi *bm,
509 struct netlink_ext_ack *extack);
510void br_boolopt_multi_get(const struct net_bridge *br,
511 struct br_boolopt_multi *bm);
512void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
513
514/* br_device.c */
515void br_dev_setup(struct net_device *dev);
516void br_dev_delete(struct net_device *dev, struct list_head *list);
517netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
518#ifdef CONFIG_NET_POLL_CONTROLLER
519static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
520 struct sk_buff *skb)
521{
522 struct netpoll *np = p->np;
523
524 if (np)
525 netpoll_send_skb(np, skb);
526}
527
528int br_netpoll_enable(struct net_bridge_port *p);
529void br_netpoll_disable(struct net_bridge_port *p);
530#else
531static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
532 struct sk_buff *skb)
533{
534}
535
536static inline int br_netpoll_enable(struct net_bridge_port *p)
537{
538 return 0;
539}
540
541static inline void br_netpoll_disable(struct net_bridge_port *p)
542{
543}
544#endif
545
546/* br_fdb.c */
547int br_fdb_init(void);
548void br_fdb_fini(void);
549int br_fdb_hash_init(struct net_bridge *br);
550void br_fdb_hash_fini(struct net_bridge *br);
551void br_fdb_flush(struct net_bridge *br);
552void br_fdb_find_delete_local(struct net_bridge *br,
553 const struct net_bridge_port *p,
554 const unsigned char *addr, u16 vid);
555void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
556void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
557void br_fdb_cleanup(struct work_struct *work);
558void br_fdb_delete_by_port(struct net_bridge *br,
559 const struct net_bridge_port *p, u16 vid, int do_all);
560struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
561 const unsigned char *addr,
562 __u16 vid);
563int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
564int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
565 unsigned long off);
566int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
567 const unsigned char *addr, u16 vid);
568void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
569 const unsigned char *addr, u16 vid, bool added_by_user);
570
571int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
572 struct net_device *dev, const unsigned char *addr, u16 vid);
573int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
574 const unsigned char *addr, u16 vid, u16 nlh_flags,
575 struct netlink_ext_ack *extack);
576int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
577 struct net_device *dev, struct net_device *fdev, int *idx);
578int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
579 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
580 struct netlink_ext_ack *extack);
581int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
582void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
583int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
584 const unsigned char *addr, u16 vid,
585 bool swdev_notify);
586int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
587 const unsigned char *addr, u16 vid,
588 bool swdev_notify);
589void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
590 const unsigned char *addr, u16 vid, bool offloaded);
591
592/* br_forward.c */
593enum br_pkt_type {
594 BR_PKT_UNICAST,
595 BR_PKT_MULTICAST,
596 BR_PKT_BROADCAST
597};
598int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
599void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
600 bool local_rcv, bool local_orig);
601int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
602void br_flood(struct net_bridge *br, struct sk_buff *skb,
603 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
604
605/* return true if both source port and dest port are isolated */
606static inline bool br_skb_isolated(const struct net_bridge_port *to,
607 const struct sk_buff *skb)
608{
609 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
610 (to->flags & BR_ISOLATED);
611}
612
613/* br_if.c */
614void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
615int br_add_bridge(struct net *net, const char *name);
616int br_del_bridge(struct net *net, const char *name);
617int br_add_if(struct net_bridge *br, struct net_device *dev,
618 struct netlink_ext_ack *extack);
619int br_del_if(struct net_bridge *br, struct net_device *dev);
620void br_mtu_auto_adjust(struct net_bridge *br);
621netdev_features_t br_features_recompute(struct net_bridge *br,
622 netdev_features_t features);
623void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
624void br_manage_promisc(struct net_bridge *br);
625int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
626
627/* br_input.c */
628int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
629rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
630
631static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
632{
633 return rcu_dereference(dev->rx_handler) == br_handle_frame;
634}
635
636static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
637{
638 return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
639}
640
641static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
642{
643 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
644}
645
646static inline struct net_bridge_port *
647br_port_get_check_rtnl(const struct net_device *dev)
648{
649 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
650}
651
652/* br_ioctl.c */
653int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
654int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
655 void __user *arg);
656
657/* br_multicast.c */
658#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
659int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
660 struct sk_buff *skb, u16 vid);
661struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
662 struct sk_buff *skb, u16 vid);
663int br_multicast_add_port(struct net_bridge_port *port);
664void br_multicast_del_port(struct net_bridge_port *port);
665void br_multicast_enable_port(struct net_bridge_port *port);
666void br_multicast_disable_port(struct net_bridge_port *port);
667void br_multicast_init(struct net_bridge *br);
668void br_multicast_open(struct net_bridge *br);
669void br_multicast_stop(struct net_bridge *br);
670void br_multicast_dev_del(struct net_bridge *br);
671void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
672 struct sk_buff *skb, bool local_rcv, bool local_orig);
673int br_multicast_set_router(struct net_bridge *br, unsigned long val);
674int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
675int br_multicast_toggle(struct net_bridge *br, unsigned long val);
676int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
677int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
678int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
679#if IS_ENABLED(CONFIG_IPV6)
680int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
681#endif
682struct net_bridge_mdb_entry *
683br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
684struct net_bridge_mdb_entry *
685br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
686struct net_bridge_port_group *
687br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
688 struct net_bridge_port_group __rcu *next,
689 unsigned char flags, const unsigned char *src);
690int br_mdb_hash_init(struct net_bridge *br);
691void br_mdb_hash_fini(struct net_bridge *br);
692void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
693 struct br_ip *group, int type, u8 flags);
694void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
695 int type);
696void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
697 const struct sk_buff *skb, u8 type, u8 dir);
698int br_multicast_init_stats(struct net_bridge *br);
699void br_multicast_uninit_stats(struct net_bridge *br);
700void br_multicast_get_stats(const struct net_bridge *br,
701 const struct net_bridge_port *p,
702 struct br_mcast_stats *dest);
703void br_mdb_init(void);
704void br_mdb_uninit(void);
705void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
706void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
707
708#define mlock_dereference(X, br) \
709 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
710
711static inline bool br_multicast_is_router(struct net_bridge *br)
712{
713 return br->multicast_router == 2 ||
714 (br->multicast_router == 1 &&
715 timer_pending(&br->multicast_router_timer));
716}
717
718static inline bool
719__br_multicast_querier_exists(struct net_bridge *br,
720 struct bridge_mcast_other_query *querier,
721 const bool is_ipv6)
722{
723 bool own_querier_enabled;
724
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;
728 else
729 own_querier_enabled = true;
730 } else {
731 own_querier_enabled = false;
732 }
733
734 return time_is_before_jiffies(querier->delay_time) &&
735 (own_querier_enabled || timer_pending(&querier->timer));
736}
737
738static inline bool br_multicast_querier_exists(struct net_bridge *br,
739 struct ethhdr *eth)
740{
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);
749#endif
750 default:
751 return false;
752 }
753}
754
755static inline int br_multicast_igmp_type(const struct sk_buff *skb)
756{
757 return BR_INPUT_SKB_CB(skb)->igmp;
758}
759#else
760static inline int br_multicast_rcv(struct net_bridge *br,
761 struct net_bridge_port *port,
762 struct sk_buff *skb,
763 u16 vid)
764{
765 return 0;
766}
767
768static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
769 struct sk_buff *skb, u16 vid)
770{
771 return NULL;
772}
773
774static inline int br_multicast_add_port(struct net_bridge_port *port)
775{
776 return 0;
777}
778
779static inline void br_multicast_del_port(struct net_bridge_port *port)
780{
781}
782
783static inline void br_multicast_enable_port(struct net_bridge_port *port)
784{
785}
786
787static inline void br_multicast_disable_port(struct net_bridge_port *port)
788{
789}
790
791static inline void br_multicast_init(struct net_bridge *br)
792{
793}
794
795static inline void br_multicast_open(struct net_bridge *br)
796{
797}
798
799static inline void br_multicast_stop(struct net_bridge *br)
800{
801}
802
803static inline void br_multicast_dev_del(struct net_bridge *br)
804{
805}
806
807static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
808 struct sk_buff *skb,
809 bool local_rcv, bool local_orig)
810{
811}
812
813static inline bool br_multicast_is_router(struct net_bridge *br)
814{
815 return false;
816}
817
818static inline bool br_multicast_querier_exists(struct net_bridge *br,
819 struct ethhdr *eth)
820{
821 return false;
822}
823
824static inline void br_mdb_init(void)
825{
826}
827
828static inline void br_mdb_uninit(void)
829{
830}
831
832static inline int br_mdb_hash_init(struct net_bridge *br)
833{
834 return 0;
835}
836
837static inline void br_mdb_hash_fini(struct net_bridge *br)
838{
839}
840
841static inline void br_multicast_count(struct net_bridge *br,
842 const struct net_bridge_port *p,
843 const struct sk_buff *skb,
844 u8 type, u8 dir)
845{
846}
847
848static inline int br_multicast_init_stats(struct net_bridge *br)
849{
850 return 0;
851}
852
853static inline void br_multicast_uninit_stats(struct net_bridge *br)
854{
855}
856
857static inline int br_multicast_igmp_type(const struct sk_buff *skb)
858{
859 return 0;
860}
861#endif
862
863/* br_vlan.c */
864#ifdef CONFIG_BRIDGE_VLAN_FILTERING
865bool br_allowed_ingress(const struct net_bridge *br,
866 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
867 u16 *vid);
868bool br_allowed_egress(struct net_bridge_vlan_group *vg,
869 const struct sk_buff *skb);
870bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
871struct 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);
875int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
876 bool *changed, struct netlink_ext_ack *extack);
877int br_vlan_delete(struct net_bridge *br, u16 vid);
878void br_vlan_flush(struct net_bridge *br);
879struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
880void br_recalculate_fwd_mask(struct net_bridge *br);
881int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
882int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
883int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
884int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
885int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
886int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
887int br_vlan_init(struct net_bridge *br);
888int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
889int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
890 struct netlink_ext_ack *extack);
891int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
892 bool *changed, struct netlink_ext_ack *extack);
893int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
894void nbp_vlan_flush(struct net_bridge_port *port);
895int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
896int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
897void br_vlan_get_stats(const struct net_bridge_vlan *v,
898 struct br_vlan_stats *stats);
899void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
900int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
901 void *ptr);
902
903static inline struct net_bridge_vlan_group *br_vlan_group(
904 const struct net_bridge *br)
905{
906 return rtnl_dereference(br->vlgrp);
907}
908
909static inline struct net_bridge_vlan_group *nbp_vlan_group(
910 const struct net_bridge_port *p)
911{
912 return rtnl_dereference(p->vlgrp);
913}
914
915static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
916 const struct net_bridge *br)
917{
918 return rcu_dereference(br->vlgrp);
919}
920
921static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
922 const struct net_bridge_port *p)
923{
924 return rcu_dereference(p->vlgrp);
925}
926
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.
929 */
930static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
931{
932 int err = 0;
933
934 if (skb_vlan_tag_present(skb)) {
935 *vid = skb_vlan_tag_get_id(skb);
936 } else {
937 *vid = 0;
938 err = -EINVAL;
939 }
940
941 return err;
942}
943
944static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
945{
946 if (!vg)
947 return 0;
948
949 smp_rmb();
950 return vg->pvid;
951}
952
953#else
954static inline bool br_allowed_ingress(const struct net_bridge *br,
955 struct net_bridge_vlan_group *vg,
956 struct sk_buff *skb,
957 u16 *vid)
958{
959 return true;
960}
961
962static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
963 const struct sk_buff *skb)
964{
965 return true;
966}
967
968static inline bool br_should_learn(struct net_bridge_port *p,
969 struct sk_buff *skb, u16 *vid)
970{
971 return true;
972}
973
974static 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,
977 struct sk_buff *skb)
978{
979 return skb;
980}
981
982static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
983 bool *changed, struct netlink_ext_ack *extack)
984{
985 *changed = false;
986 return -EOPNOTSUPP;
987}
988
989static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
990{
991 return -EOPNOTSUPP;
992}
993
994static inline void br_vlan_flush(struct net_bridge *br)
995{
996}
997
998static inline void br_recalculate_fwd_mask(struct net_bridge *br)
999{
1000}
1001
1002static inline int br_vlan_init(struct net_bridge *br)
1003{
1004 return 0;
1005}
1006
1007static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1008 bool *changed, struct netlink_ext_ack *extack)
1009{
1010 *changed = false;
1011 return -EOPNOTSUPP;
1012}
1013
1014static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1015{
1016 return -EOPNOTSUPP;
1017}
1018
1019static inline void nbp_vlan_flush(struct net_bridge_port *port)
1020{
1021}
1022
1023static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1024 u16 vid)
1025{
1026 return NULL;
1027}
1028
1029static inline int nbp_vlan_init(struct net_bridge_port *port,
1030 struct netlink_ext_ack *extack)
1031{
1032 return 0;
1033}
1034
1035static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1036{
1037 return 0;
1038}
1039
1040static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1041{
1042 return 0;
1043}
1044
1045static inline int __br_vlan_filter_toggle(struct net_bridge *br,
1046 unsigned long val)
1047{
1048 return -EOPNOTSUPP;
1049}
1050
1051static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1052 u32 filter_mask)
1053{
1054 return 0;
1055}
1056
1057static inline struct net_bridge_vlan_group *br_vlan_group(
1058 const struct net_bridge *br)
1059{
1060 return NULL;
1061}
1062
1063static inline struct net_bridge_vlan_group *nbp_vlan_group(
1064 const struct net_bridge_port *p)
1065{
1066 return NULL;
1067}
1068
1069static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1070 const struct net_bridge *br)
1071{
1072 return NULL;
1073}
1074
1075static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1076 const struct net_bridge_port *p)
1077{
1078 return NULL;
1079}
1080
1081static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1082 struct br_vlan_stats *stats)
1083{
1084}
1085
1086static inline void br_vlan_port_event(struct net_bridge_port *p,
1087 unsigned long event)
1088{
1089}
1090
1091static inline int br_vlan_bridge_event(struct net_device *dev,
1092 unsigned long event, void *ptr)
1093{
1094 return 0;
1095}
1096#endif
1097
1098struct nf_br_ops {
1099 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1100};
1101extern const struct nf_br_ops __rcu *nf_br_ops;
1102
1103/* br_netfilter.c */
1104#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1105int br_nf_core_init(void);
1106void br_nf_core_fini(void);
1107void br_netfilter_rtable_init(struct net_bridge *);
1108#else
1109static inline int br_nf_core_init(void) { return 0; }
1110static inline void br_nf_core_fini(void) {}
1111#define br_netfilter_rtable_init(x)
1112#endif
1113
1114/* br_stp.c */
1115void br_set_state(struct net_bridge_port *p, unsigned int state);
1116struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1117void br_init_port(struct net_bridge_port *p);
1118void br_become_designated_port(struct net_bridge_port *p);
1119
1120void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1121int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1122int br_set_hello_time(struct net_bridge *br, unsigned long x);
1123int br_set_max_age(struct net_bridge *br, unsigned long x);
1124int __set_ageing_time(struct net_device *dev, unsigned long t);
1125int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1126
1127
1128/* br_stp_if.c */
1129void br_stp_enable_bridge(struct net_bridge *br);
1130void br_stp_disable_bridge(struct net_bridge *br);
1131void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1132void br_stp_enable_port(struct net_bridge_port *p);
1133void br_stp_disable_port(struct net_bridge_port *p);
1134bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1135void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1136void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1137int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1138int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1139ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1140
1141/* br_stp_bpdu.c */
1142struct stp_proto;
1143void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1144 struct net_device *dev);
1145
1146/* br_stp_timer.c */
1147void br_stp_timer_init(struct net_bridge *br);
1148void br_stp_port_timer_init(struct net_bridge_port *p);
1149unsigned long br_timer_value(const struct timer_list *timer);
1150
1151/* br.c */
1152#if IS_ENABLED(CONFIG_ATM_LANE)
1153extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1154#endif
1155
1156/* br_netlink.c */
1157extern struct rtnl_link_ops br_link_ops;
1158int br_netlink_init(void);
1159void br_netlink_fini(void);
1160void br_ifinfo_notify(int event, const struct net_bridge *br,
1161 const struct net_bridge_port *port);
1162int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1163 struct netlink_ext_ack *extack);
1164int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1165int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1166 u32 filter_mask, int nlflags);
1167
1168#ifdef CONFIG_SYSFS
1169/* br_sysfs_if.c */
1170extern const struct sysfs_ops brport_sysfs_ops;
1171int br_sysfs_addif(struct net_bridge_port *p);
1172int br_sysfs_renameif(struct net_bridge_port *p);
1173
1174/* br_sysfs_br.c */
1175int br_sysfs_addbr(struct net_device *dev);
1176void br_sysfs_delbr(struct net_device *dev);
1177
1178#else
1179
1180static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1181static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1182static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1183static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1184#endif /* CONFIG_SYSFS */
1185
1186/* br_switchdev.c */
1187#ifdef CONFIG_NET_SWITCHDEV
1188int nbp_switchdev_mark_set(struct net_bridge_port *p);
1189void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1190 struct sk_buff *skb);
1191bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1192 const struct sk_buff *skb);
1193int br_switchdev_set_port_flag(struct net_bridge_port *p,
1194 unsigned long flags,
1195 unsigned long mask);
1196void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1197 int type);
1198int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1199 struct netlink_ext_ack *extack);
1200int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1201
1202static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1203{
1204 skb->offload_fwd_mark = 0;
1205}
1206#else
1207static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1208{
1209 return 0;
1210}
1211
1212static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1213 struct sk_buff *skb)
1214{
1215}
1216
1217static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1218 const struct sk_buff *skb)
1219{
1220 return true;
1221}
1222
1223static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1224 unsigned long flags,
1225 unsigned long mask)
1226{
1227 return 0;
1228}
1229
1230static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1231 u16 vid, u16 flags,
1232 struct netlink_ext_ack *extack)
1233{
1234 return -EOPNOTSUPP;
1235}
1236
1237static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1238{
1239 return -EOPNOTSUPP;
1240}
1241
1242static inline void
1243br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1244{
1245}
1246
1247static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1248{
1249}
1250#endif /* CONFIG_NET_SWITCHDEV */
1251
1252/* br_arp_nd_proxy.c */
1253void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1254void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1255 u16 vid, struct net_bridge_port *p);
1256void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1257 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1258struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1259#endif
1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
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.
11 */
12
13#ifndef _BR_PRIVATE_H
14#define _BR_PRIVATE_H
15
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 <linux/if_vlan.h>
22
23#define BR_HASH_BITS 8
24#define BR_HASH_SIZE (1 << BR_HASH_BITS)
25
26#define BR_HOLD_TIME (1*HZ)
27
28#define BR_PORT_BITS 10
29#define BR_MAX_PORTS (1<<BR_PORT_BITS)
30#define BR_VLAN_BITMAP_LEN BITS_TO_LONGS(VLAN_N_VID)
31
32#define BR_VERSION "2.3"
33
34/* Control of forwarding link local multicast */
35#define BR_GROUPFWD_DEFAULT 0
36/* Don't allow forwarding control protocols like STP and LLDP */
37#define BR_GROUPFWD_RESTRICTED 0x4007u
38
39/* Path to usermode spanning tree program */
40#define BR_STP_PROG "/sbin/bridge-stp"
41
42typedef struct bridge_id bridge_id;
43typedef struct mac_addr mac_addr;
44typedef __u16 port_id;
45
46struct bridge_id
47{
48 unsigned char prio[2];
49 unsigned char addr[ETH_ALEN];
50};
51
52struct mac_addr
53{
54 unsigned char addr[ETH_ALEN];
55};
56
57struct br_ip
58{
59 union {
60 __be32 ip4;
61#if IS_ENABLED(CONFIG_IPV6)
62 struct in6_addr ip6;
63#endif
64 } u;
65 __be16 proto;
66 __u16 vid;
67};
68
69#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
70/* our own querier */
71struct bridge_mcast_query {
72 struct timer_list timer;
73 u32 startup_sent;
74};
75
76/* other querier */
77struct bridge_mcast_querier {
78 struct timer_list timer;
79 unsigned long delay_time;
80};
81#endif
82
83struct net_port_vlans {
84 u16 port_idx;
85 u16 pvid;
86 union {
87 struct net_bridge_port *port;
88 struct net_bridge *br;
89 } parent;
90 struct rcu_head rcu;
91 unsigned long vlan_bitmap[BR_VLAN_BITMAP_LEN];
92 unsigned long untagged_bitmap[BR_VLAN_BITMAP_LEN];
93 u16 num_vlans;
94};
95
96struct net_bridge_fdb_entry
97{
98 struct hlist_node hlist;
99 struct net_bridge_port *dst;
100
101 struct rcu_head rcu;
102 unsigned long updated;
103 unsigned long used;
104 mac_addr addr;
105 unsigned char is_local;
106 unsigned char is_static;
107 unsigned char added_by_user;
108 __u16 vlan_id;
109};
110
111struct net_bridge_port_group {
112 struct net_bridge_port *port;
113 struct net_bridge_port_group __rcu *next;
114 struct hlist_node mglist;
115 struct rcu_head rcu;
116 struct timer_list timer;
117 struct br_ip addr;
118 unsigned char state;
119};
120
121struct net_bridge_mdb_entry
122{
123 struct hlist_node hlist[2];
124 struct net_bridge *br;
125 struct net_bridge_port_group __rcu *ports;
126 struct rcu_head rcu;
127 struct timer_list timer;
128 struct br_ip addr;
129 bool mglist;
130};
131
132struct net_bridge_mdb_htable
133{
134 struct hlist_head *mhash;
135 struct rcu_head rcu;
136 struct net_bridge_mdb_htable *old;
137 u32 size;
138 u32 max;
139 u32 secret;
140 u32 ver;
141};
142
143struct net_bridge_port
144{
145 struct net_bridge *br;
146 struct net_device *dev;
147 struct list_head list;
148
149 /* STP */
150 u8 priority;
151 u8 state;
152 u16 port_no;
153 unsigned char topology_change_ack;
154 unsigned char config_pending;
155 port_id port_id;
156 port_id designated_port;
157 bridge_id designated_root;
158 bridge_id designated_bridge;
159 u32 path_cost;
160 u32 designated_cost;
161 unsigned long designated_age;
162
163 struct timer_list forward_delay_timer;
164 struct timer_list hold_timer;
165 struct timer_list message_age_timer;
166 struct kobject kobj;
167 struct rcu_head rcu;
168
169 unsigned long flags;
170#define BR_HAIRPIN_MODE 0x00000001
171#define BR_BPDU_GUARD 0x00000002
172#define BR_ROOT_BLOCK 0x00000004
173#define BR_MULTICAST_FAST_LEAVE 0x00000008
174#define BR_ADMIN_COST 0x00000010
175#define BR_LEARNING 0x00000020
176#define BR_FLOOD 0x00000040
177
178#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
179 struct bridge_mcast_query ip4_query;
180#if IS_ENABLED(CONFIG_IPV6)
181 struct bridge_mcast_query ip6_query;
182#endif /* IS_ENABLED(CONFIG_IPV6) */
183 unsigned char multicast_router;
184 struct timer_list multicast_router_timer;
185 struct hlist_head mglist;
186 struct hlist_node rlist;
187#endif
188
189#ifdef CONFIG_SYSFS
190 char sysfs_name[IFNAMSIZ];
191#endif
192
193#ifdef CONFIG_NET_POLL_CONTROLLER
194 struct netpoll *np;
195#endif
196#ifdef CONFIG_BRIDGE_VLAN_FILTERING
197 struct net_port_vlans __rcu *vlan_info;
198#endif
199};
200
201#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
202
203static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
204{
205 return rcu_dereference(dev->rx_handler_data);
206}
207
208static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
209{
210 return br_port_exists(dev) ?
211 rtnl_dereference(dev->rx_handler_data) : NULL;
212}
213
214struct net_bridge
215{
216 spinlock_t lock;
217 struct list_head port_list;
218 struct net_device *dev;
219
220 struct pcpu_sw_netstats __percpu *stats;
221 spinlock_t hash_lock;
222 struct hlist_head hash[BR_HASH_SIZE];
223#ifdef CONFIG_BRIDGE_NETFILTER
224 struct rtable fake_rtable;
225 bool nf_call_iptables;
226 bool nf_call_ip6tables;
227 bool nf_call_arptables;
228#endif
229 u16 group_fwd_mask;
230
231 /* STP */
232 bridge_id designated_root;
233 bridge_id bridge_id;
234 u32 root_path_cost;
235 unsigned long max_age;
236 unsigned long hello_time;
237 unsigned long forward_delay;
238 unsigned long bridge_max_age;
239 unsigned long ageing_time;
240 unsigned long bridge_hello_time;
241 unsigned long bridge_forward_delay;
242
243 u8 group_addr[ETH_ALEN];
244 u16 root_port;
245
246 enum {
247 BR_NO_STP, /* no spanning tree */
248 BR_KERNEL_STP, /* old STP in kernel */
249 BR_USER_STP, /* new RSTP in userspace */
250 } stp_enabled;
251
252 unsigned char topology_change;
253 unsigned char topology_change_detected;
254
255#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
256 unsigned char multicast_router;
257
258 u8 multicast_disabled:1;
259 u8 multicast_querier:1;
260 u8 multicast_query_use_ifaddr:1;
261
262 u32 hash_elasticity;
263 u32 hash_max;
264
265 u32 multicast_last_member_count;
266 u32 multicast_startup_query_count;
267
268 unsigned long multicast_last_member_interval;
269 unsigned long multicast_membership_interval;
270 unsigned long multicast_querier_interval;
271 unsigned long multicast_query_interval;
272 unsigned long multicast_query_response_interval;
273 unsigned long multicast_startup_query_interval;
274
275 spinlock_t multicast_lock;
276 struct net_bridge_mdb_htable __rcu *mdb;
277 struct hlist_head router_list;
278
279 struct timer_list multicast_router_timer;
280 struct bridge_mcast_querier ip4_querier;
281 struct bridge_mcast_query ip4_query;
282#if IS_ENABLED(CONFIG_IPV6)
283 struct bridge_mcast_querier ip6_querier;
284 struct bridge_mcast_query ip6_query;
285#endif /* IS_ENABLED(CONFIG_IPV6) */
286#endif
287
288 struct timer_list hello_timer;
289 struct timer_list tcn_timer;
290 struct timer_list topology_change_timer;
291 struct timer_list gc_timer;
292 struct kobject *ifobj;
293#ifdef CONFIG_BRIDGE_VLAN_FILTERING
294 u8 vlan_enabled;
295 struct net_port_vlans __rcu *vlan_info;
296#endif
297};
298
299struct br_input_skb_cb {
300 struct net_device *brdev;
301#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
302 int igmp;
303 int mrouters_only;
304#endif
305};
306
307#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
308
309#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
310# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
311#else
312# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
313#endif
314
315#define br_printk(level, br, format, args...) \
316 printk(level "%s: " format, (br)->dev->name, ##args)
317
318#define br_err(__br, format, args...) \
319 br_printk(KERN_ERR, __br, format, ##args)
320#define br_warn(__br, format, args...) \
321 br_printk(KERN_WARNING, __br, format, ##args)
322#define br_notice(__br, format, args...) \
323 br_printk(KERN_NOTICE, __br, format, ##args)
324#define br_info(__br, format, args...) \
325 br_printk(KERN_INFO, __br, format, ##args)
326
327#define br_debug(br, format, args...) \
328 pr_debug("%s: " format, (br)->dev->name, ##args)
329
330extern struct notifier_block br_device_notifier;
331
332/* called under bridge lock */
333static inline int br_is_root_bridge(const struct net_bridge *br)
334{
335 return !memcmp(&br->bridge_id, &br->designated_root, 8);
336}
337
338/* br_device.c */
339void br_dev_setup(struct net_device *dev);
340void br_dev_delete(struct net_device *dev, struct list_head *list);
341netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
342#ifdef CONFIG_NET_POLL_CONTROLLER
343static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
344 struct sk_buff *skb)
345{
346 struct netpoll *np = p->np;
347
348 if (np)
349 netpoll_send_skb(np, skb);
350}
351
352int br_netpoll_enable(struct net_bridge_port *p);
353void br_netpoll_disable(struct net_bridge_port *p);
354#else
355static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
356 struct sk_buff *skb)
357{
358}
359
360static inline int br_netpoll_enable(struct net_bridge_port *p)
361{
362 return 0;
363}
364
365static inline void br_netpoll_disable(struct net_bridge_port *p)
366{
367}
368#endif
369
370/* br_fdb.c */
371int br_fdb_init(void);
372void br_fdb_fini(void);
373void br_fdb_flush(struct net_bridge *br);
374void br_fdb_find_delete_local(struct net_bridge *br,
375 const struct net_bridge_port *p,
376 const unsigned char *addr, u16 vid);
377void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
378void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
379void br_fdb_cleanup(unsigned long arg);
380void br_fdb_delete_by_port(struct net_bridge *br,
381 const struct net_bridge_port *p, int do_all);
382struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
383 const unsigned char *addr, __u16 vid);
384int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
385int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
386 unsigned long off);
387int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
388 const unsigned char *addr, u16 vid);
389void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
390 const unsigned char *addr, u16 vid, bool added_by_user);
391
392int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
393 struct net_device *dev, const unsigned char *addr);
394int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
395 const unsigned char *addr, u16 nlh_flags);
396int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
397 struct net_device *dev, int idx);
398
399/* br_forward.c */
400void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
401int br_dev_queue_push_xmit(struct sk_buff *skb);
402void br_forward(const struct net_bridge_port *to,
403 struct sk_buff *skb, struct sk_buff *skb0);
404int br_forward_finish(struct sk_buff *skb);
405void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
406void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
407 struct sk_buff *skb2, bool unicast);
408
409/* br_if.c */
410void br_port_carrier_check(struct net_bridge_port *p);
411int br_add_bridge(struct net *net, const char *name);
412int br_del_bridge(struct net *net, const char *name);
413int br_add_if(struct net_bridge *br, struct net_device *dev);
414int br_del_if(struct net_bridge *br, struct net_device *dev);
415int br_min_mtu(const struct net_bridge *br);
416netdev_features_t br_features_recompute(struct net_bridge *br,
417 netdev_features_t features);
418
419/* br_input.c */
420int br_handle_frame_finish(struct sk_buff *skb);
421rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
422
423static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
424{
425 return rcu_dereference(dev->rx_handler) == br_handle_frame;
426}
427
428static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
429{
430 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
431}
432
433/* br_ioctl.c */
434int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
435int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
436 void __user *arg);
437
438/* br_multicast.c */
439#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
440extern unsigned int br_mdb_rehash_seq;
441int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
442 struct sk_buff *skb, u16 vid);
443struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
444 struct sk_buff *skb, u16 vid);
445void br_multicast_add_port(struct net_bridge_port *port);
446void br_multicast_del_port(struct net_bridge_port *port);
447void br_multicast_enable_port(struct net_bridge_port *port);
448void br_multicast_disable_port(struct net_bridge_port *port);
449void br_multicast_init(struct net_bridge *br);
450void br_multicast_open(struct net_bridge *br);
451void br_multicast_stop(struct net_bridge *br);
452void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
453 struct sk_buff *skb);
454void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
455 struct sk_buff *skb, struct sk_buff *skb2);
456int br_multicast_set_router(struct net_bridge *br, unsigned long val);
457int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
458int br_multicast_toggle(struct net_bridge *br, unsigned long val);
459int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
460int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
461struct net_bridge_mdb_entry *
462br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
463struct net_bridge_mdb_entry *
464br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
465 struct br_ip *group);
466void br_multicast_free_pg(struct rcu_head *head);
467struct net_bridge_port_group *
468br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
469 struct net_bridge_port_group __rcu *next,
470 unsigned char state);
471void br_mdb_init(void);
472void br_mdb_uninit(void);
473void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
474 struct br_ip *group, int type);
475
476#define mlock_dereference(X, br) \
477 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
478
479static inline bool br_multicast_is_router(struct net_bridge *br)
480{
481 return br->multicast_router == 2 ||
482 (br->multicast_router == 1 &&
483 timer_pending(&br->multicast_router_timer));
484}
485
486static inline bool
487__br_multicast_querier_exists(struct net_bridge *br,
488 struct bridge_mcast_querier *querier)
489{
490 return time_is_before_jiffies(querier->delay_time) &&
491 (br->multicast_querier || timer_pending(&querier->timer));
492}
493
494static inline bool br_multicast_querier_exists(struct net_bridge *br,
495 struct ethhdr *eth)
496{
497 switch (eth->h_proto) {
498 case (htons(ETH_P_IP)):
499 return __br_multicast_querier_exists(br, &br->ip4_querier);
500#if IS_ENABLED(CONFIG_IPV6)
501 case (htons(ETH_P_IPV6)):
502 return __br_multicast_querier_exists(br, &br->ip6_querier);
503#endif
504 default:
505 return false;
506 }
507}
508#else
509static inline int br_multicast_rcv(struct net_bridge *br,
510 struct net_bridge_port *port,
511 struct sk_buff *skb,
512 u16 vid)
513{
514 return 0;
515}
516
517static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
518 struct sk_buff *skb, u16 vid)
519{
520 return NULL;
521}
522
523static inline void br_multicast_add_port(struct net_bridge_port *port)
524{
525}
526
527static inline void br_multicast_del_port(struct net_bridge_port *port)
528{
529}
530
531static inline void br_multicast_enable_port(struct net_bridge_port *port)
532{
533}
534
535static inline void br_multicast_disable_port(struct net_bridge_port *port)
536{
537}
538
539static inline void br_multicast_init(struct net_bridge *br)
540{
541}
542
543static inline void br_multicast_open(struct net_bridge *br)
544{
545}
546
547static inline void br_multicast_stop(struct net_bridge *br)
548{
549}
550
551static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
552 struct sk_buff *skb)
553{
554}
555
556static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
557 struct sk_buff *skb,
558 struct sk_buff *skb2)
559{
560}
561static inline bool br_multicast_is_router(struct net_bridge *br)
562{
563 return 0;
564}
565static inline bool br_multicast_querier_exists(struct net_bridge *br,
566 struct ethhdr *eth)
567{
568 return false;
569}
570static inline void br_mdb_init(void)
571{
572}
573static inline void br_mdb_uninit(void)
574{
575}
576#endif
577
578/* br_vlan.c */
579#ifdef CONFIG_BRIDGE_VLAN_FILTERING
580bool br_allowed_ingress(struct net_bridge *br, struct net_port_vlans *v,
581 struct sk_buff *skb, u16 *vid);
582bool br_allowed_egress(struct net_bridge *br, const struct net_port_vlans *v,
583 const struct sk_buff *skb);
584bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
585struct sk_buff *br_handle_vlan(struct net_bridge *br,
586 const struct net_port_vlans *v,
587 struct sk_buff *skb);
588int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
589int br_vlan_delete(struct net_bridge *br, u16 vid);
590void br_vlan_flush(struct net_bridge *br);
591bool br_vlan_find(struct net_bridge *br, u16 vid);
592int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
593int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
594int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
595void nbp_vlan_flush(struct net_bridge_port *port);
596bool nbp_vlan_find(struct net_bridge_port *port, u16 vid);
597
598static inline struct net_port_vlans *br_get_vlan_info(
599 const struct net_bridge *br)
600{
601 return rcu_dereference_rtnl(br->vlan_info);
602}
603
604static inline struct net_port_vlans *nbp_get_vlan_info(
605 const struct net_bridge_port *p)
606{
607 return rcu_dereference_rtnl(p->vlan_info);
608}
609
610/* Since bridge now depends on 8021Q module, but the time bridge sees the
611 * skb, the vlan tag will always be present if the frame was tagged.
612 */
613static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
614{
615 int err = 0;
616
617 if (vlan_tx_tag_present(skb))
618 *vid = vlan_tx_tag_get(skb) & VLAN_VID_MASK;
619 else {
620 *vid = 0;
621 err = -EINVAL;
622 }
623
624 return err;
625}
626
627static inline u16 br_get_pvid(const struct net_port_vlans *v)
628{
629 /* Return just the VID if it is set, or VLAN_N_VID (invalid vid) if
630 * vid wasn't set
631 */
632 smp_rmb();
633 return v->pvid ?: VLAN_N_VID;
634}
635
636#else
637static inline bool br_allowed_ingress(struct net_bridge *br,
638 struct net_port_vlans *v,
639 struct sk_buff *skb,
640 u16 *vid)
641{
642 return true;
643}
644
645static inline bool br_allowed_egress(struct net_bridge *br,
646 const struct net_port_vlans *v,
647 const struct sk_buff *skb)
648{
649 return true;
650}
651
652static inline bool br_should_learn(struct net_bridge_port *p,
653 struct sk_buff *skb, u16 *vid)
654{
655 return true;
656}
657
658static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
659 const struct net_port_vlans *v,
660 struct sk_buff *skb)
661{
662 return skb;
663}
664
665static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
666{
667 return -EOPNOTSUPP;
668}
669
670static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
671{
672 return -EOPNOTSUPP;
673}
674
675static inline void br_vlan_flush(struct net_bridge *br)
676{
677}
678
679static inline bool br_vlan_find(struct net_bridge *br, u16 vid)
680{
681 return false;
682}
683
684static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
685{
686 return -EOPNOTSUPP;
687}
688
689static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
690{
691 return -EOPNOTSUPP;
692}
693
694static inline void nbp_vlan_flush(struct net_bridge_port *port)
695{
696}
697
698static inline struct net_port_vlans *br_get_vlan_info(
699 const struct net_bridge *br)
700{
701 return NULL;
702}
703static inline struct net_port_vlans *nbp_get_vlan_info(
704 const struct net_bridge_port *p)
705{
706 return NULL;
707}
708
709static inline bool nbp_vlan_find(struct net_bridge_port *port, u16 vid)
710{
711 return false;
712}
713
714static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
715{
716 return 0;
717}
718static inline u16 br_get_pvid(const struct net_port_vlans *v)
719{
720 return VLAN_N_VID; /* Returns invalid vid */
721}
722#endif
723
724/* br_netfilter.c */
725#ifdef CONFIG_BRIDGE_NETFILTER
726int br_netfilter_init(void);
727void br_netfilter_fini(void);
728void br_netfilter_rtable_init(struct net_bridge *);
729#else
730#define br_netfilter_init() (0)
731#define br_netfilter_fini() do { } while (0)
732#define br_netfilter_rtable_init(x)
733#endif
734
735/* br_stp.c */
736void br_log_state(const struct net_bridge_port *p);
737struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
738void br_init_port(struct net_bridge_port *p);
739void br_become_designated_port(struct net_bridge_port *p);
740
741void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
742int br_set_forward_delay(struct net_bridge *br, unsigned long x);
743int br_set_hello_time(struct net_bridge *br, unsigned long x);
744int br_set_max_age(struct net_bridge *br, unsigned long x);
745
746
747/* br_stp_if.c */
748void br_stp_enable_bridge(struct net_bridge *br);
749void br_stp_disable_bridge(struct net_bridge *br);
750void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
751void br_stp_enable_port(struct net_bridge_port *p);
752void br_stp_disable_port(struct net_bridge_port *p);
753bool br_stp_recalculate_bridge_id(struct net_bridge *br);
754void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
755void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
756int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
757int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
758ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
759
760/* br_stp_bpdu.c */
761struct stp_proto;
762void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
763 struct net_device *dev);
764
765/* br_stp_timer.c */
766void br_stp_timer_init(struct net_bridge *br);
767void br_stp_port_timer_init(struct net_bridge_port *p);
768unsigned long br_timer_value(const struct timer_list *timer);
769
770/* br.c */
771#if IS_ENABLED(CONFIG_ATM_LANE)
772extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
773#endif
774
775/* br_netlink.c */
776extern struct rtnl_link_ops br_link_ops;
777int br_netlink_init(void);
778void br_netlink_fini(void);
779void br_ifinfo_notify(int event, struct net_bridge_port *port);
780int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
781int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg);
782int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
783 u32 filter_mask);
784
785#ifdef CONFIG_SYSFS
786/* br_sysfs_if.c */
787extern const struct sysfs_ops brport_sysfs_ops;
788int br_sysfs_addif(struct net_bridge_port *p);
789int br_sysfs_renameif(struct net_bridge_port *p);
790
791/* br_sysfs_br.c */
792int br_sysfs_addbr(struct net_device *dev);
793void br_sysfs_delbr(struct net_device *dev);
794
795#else
796
797static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
798static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
799static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
800static inline void br_sysfs_delbr(struct net_device *dev) { return; }
801#endif /* CONFIG_SYSFS */
802
803#endif