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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 <net/ip6_fib.h>
22#include <linux/if_vlan.h>
23#include <linux/rhashtable.h>
24
25#define BR_HASH_BITS 8
26#define BR_HASH_SIZE (1 << BR_HASH_BITS)
27
28#define BR_HOLD_TIME (1*HZ)
29
30#define BR_PORT_BITS 10
31#define BR_MAX_PORTS (1<<BR_PORT_BITS)
32
33#define BR_VERSION "2.3"
34
35/* Control of forwarding link local multicast */
36#define BR_GROUPFWD_DEFAULT 0
37/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
38#define BR_GROUPFWD_RESTRICTED 0x0007u
39/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
40#define BR_GROUPFWD_8021AD 0xB801u
41
42/* Path to usermode spanning tree program */
43#define BR_STP_PROG "/sbin/bridge-stp"
44
45typedef struct bridge_id bridge_id;
46typedef struct mac_addr mac_addr;
47typedef __u16 port_id;
48
49struct bridge_id
50{
51 unsigned char prio[2];
52 unsigned char addr[ETH_ALEN];
53};
54
55struct mac_addr
56{
57 unsigned char addr[ETH_ALEN];
58};
59
60#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
61/* our own querier */
62struct bridge_mcast_own_query {
63 struct timer_list timer;
64 u32 startup_sent;
65};
66
67/* other querier */
68struct bridge_mcast_other_query {
69 struct timer_list timer;
70 unsigned long delay_time;
71};
72
73/* selected querier */
74struct bridge_mcast_querier {
75 struct br_ip addr;
76 struct net_bridge_port __rcu *port;
77};
78#endif
79
80/**
81 * struct net_bridge_vlan - per-vlan entry
82 *
83 * @vnode: rhashtable member
84 * @vid: VLAN id
85 * @flags: bridge vlan flags
86 * @br: if MASTER flag set, this points to a bridge struct
87 * @port: if MASTER flag unset, this points to a port struct
88 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
89 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
90 * for this VLAN entry
91 * @vlist: sorted list of VLAN entries
92 * @rcu: used for entry destruction
93 *
94 * This structure is shared between the global per-VLAN entries contained in
95 * the bridge rhashtable and the local per-port per-VLAN entries contained in
96 * the port's rhashtable. The union entries should be interpreted depending on
97 * the entry flags that are set.
98 */
99struct net_bridge_vlan {
100 struct rhash_head vnode;
101 u16 vid;
102 u16 flags;
103 union {
104 struct net_bridge *br;
105 struct net_bridge_port *port;
106 };
107 union {
108 atomic_t refcnt;
109 struct net_bridge_vlan *brvlan;
110 };
111 struct list_head vlist;
112
113 struct rcu_head rcu;
114};
115
116/**
117 * struct net_bridge_vlan_group
118 *
119 * @vlan_hash: VLAN entry rhashtable
120 * @vlan_list: sorted VLAN entry list
121 * @num_vlans: number of total VLAN entries
122 * @pvid: PVID VLAN id
123 *
124 * IMPORTANT: Be careful when checking if there're VLAN entries using list
125 * primitives because the bridge can have entries in its list which
126 * are just for global context but not for filtering, i.e. they have
127 * the master flag set but not the brentry flag. If you have to check
128 * if there're "real" entries in the bridge please test @num_vlans
129 */
130struct net_bridge_vlan_group {
131 struct rhashtable vlan_hash;
132 struct list_head vlan_list;
133 u16 num_vlans;
134 u16 pvid;
135};
136
137struct net_bridge_fdb_entry
138{
139 struct hlist_node hlist;
140 struct net_bridge_port *dst;
141
142 unsigned long updated;
143 unsigned long used;
144 mac_addr addr;
145 __u16 vlan_id;
146 unsigned char is_local:1,
147 is_static:1,
148 added_by_user:1,
149 added_by_external_learn:1;
150 struct rcu_head rcu;
151};
152
153#define MDB_PG_FLAGS_PERMANENT BIT(0)
154#define MDB_PG_FLAGS_OFFLOAD BIT(1)
155
156struct net_bridge_port_group {
157 struct net_bridge_port *port;
158 struct net_bridge_port_group __rcu *next;
159 struct hlist_node mglist;
160 struct rcu_head rcu;
161 struct timer_list timer;
162 struct br_ip addr;
163 unsigned char flags;
164};
165
166struct net_bridge_mdb_entry
167{
168 struct hlist_node hlist[2];
169 struct net_bridge *br;
170 struct net_bridge_port_group __rcu *ports;
171 struct rcu_head rcu;
172 struct timer_list timer;
173 struct br_ip addr;
174 bool mglist;
175};
176
177struct net_bridge_mdb_htable
178{
179 struct hlist_head *mhash;
180 struct rcu_head rcu;
181 struct net_bridge_mdb_htable *old;
182 u32 size;
183 u32 max;
184 u32 secret;
185 u32 ver;
186};
187
188struct net_bridge_port
189{
190 struct net_bridge *br;
191 struct net_device *dev;
192 struct list_head list;
193
194 /* STP */
195 u8 priority;
196 u8 state;
197 u16 port_no;
198 unsigned char topology_change_ack;
199 unsigned char config_pending;
200 port_id port_id;
201 port_id designated_port;
202 bridge_id designated_root;
203 bridge_id designated_bridge;
204 u32 path_cost;
205 u32 designated_cost;
206 unsigned long designated_age;
207
208 struct timer_list forward_delay_timer;
209 struct timer_list hold_timer;
210 struct timer_list message_age_timer;
211 struct kobject kobj;
212 struct rcu_head rcu;
213
214 unsigned long flags;
215
216#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
217 struct bridge_mcast_own_query ip4_own_query;
218#if IS_ENABLED(CONFIG_IPV6)
219 struct bridge_mcast_own_query ip6_own_query;
220#endif /* IS_ENABLED(CONFIG_IPV6) */
221 unsigned char multicast_router;
222 struct timer_list multicast_router_timer;
223 struct hlist_head mglist;
224 struct hlist_node rlist;
225#endif
226
227#ifdef CONFIG_SYSFS
228 char sysfs_name[IFNAMSIZ];
229#endif
230
231#ifdef CONFIG_NET_POLL_CONTROLLER
232 struct netpoll *np;
233#endif
234#ifdef CONFIG_BRIDGE_VLAN_FILTERING
235 struct net_bridge_vlan_group __rcu *vlgrp;
236#endif
237};
238
239#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
240#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
241
242#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
243
244static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
245{
246 return rcu_dereference(dev->rx_handler_data);
247}
248
249static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
250{
251 return br_port_exists(dev) ?
252 rtnl_dereference(dev->rx_handler_data) : NULL;
253}
254
255struct net_bridge
256{
257 spinlock_t lock;
258 struct list_head port_list;
259 struct net_device *dev;
260
261 struct pcpu_sw_netstats __percpu *stats;
262 spinlock_t hash_lock;
263 struct hlist_head hash[BR_HASH_SIZE];
264#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
265 union {
266 struct rtable fake_rtable;
267 struct rt6_info fake_rt6_info;
268 };
269 bool nf_call_iptables;
270 bool nf_call_ip6tables;
271 bool nf_call_arptables;
272#endif
273 u16 group_fwd_mask;
274 u16 group_fwd_mask_required;
275
276 /* STP */
277 bridge_id designated_root;
278 bridge_id bridge_id;
279 u32 root_path_cost;
280 unsigned long max_age;
281 unsigned long hello_time;
282 unsigned long forward_delay;
283 unsigned long bridge_max_age;
284 unsigned long ageing_time;
285 unsigned long bridge_hello_time;
286 unsigned long bridge_forward_delay;
287
288 u8 group_addr[ETH_ALEN];
289 bool group_addr_set;
290 u16 root_port;
291
292 enum {
293 BR_NO_STP, /* no spanning tree */
294 BR_KERNEL_STP, /* old STP in kernel */
295 BR_USER_STP, /* new RSTP in userspace */
296 } stp_enabled;
297
298 unsigned char topology_change;
299 unsigned char topology_change_detected;
300
301#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
302 unsigned char multicast_router;
303
304 u8 multicast_disabled:1;
305 u8 multicast_querier:1;
306 u8 multicast_query_use_ifaddr:1;
307
308 u32 hash_elasticity;
309 u32 hash_max;
310
311 u32 multicast_last_member_count;
312 u32 multicast_startup_query_count;
313
314 unsigned long multicast_last_member_interval;
315 unsigned long multicast_membership_interval;
316 unsigned long multicast_querier_interval;
317 unsigned long multicast_query_interval;
318 unsigned long multicast_query_response_interval;
319 unsigned long multicast_startup_query_interval;
320
321 spinlock_t multicast_lock;
322 struct net_bridge_mdb_htable __rcu *mdb;
323 struct hlist_head router_list;
324
325 struct timer_list multicast_router_timer;
326 struct bridge_mcast_other_query ip4_other_query;
327 struct bridge_mcast_own_query ip4_own_query;
328 struct bridge_mcast_querier ip4_querier;
329#if IS_ENABLED(CONFIG_IPV6)
330 struct bridge_mcast_other_query ip6_other_query;
331 struct bridge_mcast_own_query ip6_own_query;
332 struct bridge_mcast_querier ip6_querier;
333#endif /* IS_ENABLED(CONFIG_IPV6) */
334#endif
335
336 struct timer_list hello_timer;
337 struct timer_list tcn_timer;
338 struct timer_list topology_change_timer;
339 struct timer_list gc_timer;
340 struct kobject *ifobj;
341 u32 auto_cnt;
342#ifdef CONFIG_BRIDGE_VLAN_FILTERING
343 struct net_bridge_vlan_group __rcu *vlgrp;
344 u8 vlan_enabled;
345 __be16 vlan_proto;
346 u16 default_pvid;
347#endif
348};
349
350struct br_input_skb_cb {
351 struct net_device *brdev;
352
353#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
354 int igmp;
355 int mrouters_only;
356#endif
357
358 bool proxyarp_replied;
359
360#ifdef CONFIG_BRIDGE_VLAN_FILTERING
361 bool vlan_filtered;
362#endif
363};
364
365#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
366
367#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
368# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
369#else
370# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
371#endif
372
373#define br_printk(level, br, format, args...) \
374 printk(level "%s: " format, (br)->dev->name, ##args)
375
376#define br_err(__br, format, args...) \
377 br_printk(KERN_ERR, __br, format, ##args)
378#define br_warn(__br, format, args...) \
379 br_printk(KERN_WARNING, __br, format, ##args)
380#define br_notice(__br, format, args...) \
381 br_printk(KERN_NOTICE, __br, format, ##args)
382#define br_info(__br, format, args...) \
383 br_printk(KERN_INFO, __br, format, ##args)
384
385#define br_debug(br, format, args...) \
386 pr_debug("%s: " format, (br)->dev->name, ##args)
387
388/* called under bridge lock */
389static inline int br_is_root_bridge(const struct net_bridge *br)
390{
391 return !memcmp(&br->bridge_id, &br->designated_root, 8);
392}
393
394/* check if a VLAN entry is global */
395static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
396{
397 return v->flags & BRIDGE_VLAN_INFO_MASTER;
398}
399
400/* check if a VLAN entry is used by the bridge */
401static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
402{
403 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
404}
405
406/* check if we should use the vlan entry, returns false if it's only context */
407static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
408{
409 if (br_vlan_is_master(v)) {
410 if (br_vlan_is_brentry(v))
411 return true;
412 else
413 return false;
414 }
415
416 return true;
417}
418
419/* br_device.c */
420void br_dev_setup(struct net_device *dev);
421void br_dev_delete(struct net_device *dev, struct list_head *list);
422netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
423#ifdef CONFIG_NET_POLL_CONTROLLER
424static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
425 struct sk_buff *skb)
426{
427 struct netpoll *np = p->np;
428
429 if (np)
430 netpoll_send_skb(np, skb);
431}
432
433int br_netpoll_enable(struct net_bridge_port *p);
434void br_netpoll_disable(struct net_bridge_port *p);
435#else
436static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
437 struct sk_buff *skb)
438{
439}
440
441static inline int br_netpoll_enable(struct net_bridge_port *p)
442{
443 return 0;
444}
445
446static inline void br_netpoll_disable(struct net_bridge_port *p)
447{
448}
449#endif
450
451/* br_fdb.c */
452int br_fdb_init(void);
453void br_fdb_fini(void);
454void br_fdb_flush(struct net_bridge *br);
455void br_fdb_find_delete_local(struct net_bridge *br,
456 const struct net_bridge_port *p,
457 const unsigned char *addr, u16 vid);
458void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
459void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
460void br_fdb_cleanup(unsigned long arg);
461void br_fdb_delete_by_port(struct net_bridge *br,
462 const struct net_bridge_port *p, u16 vid, int do_all);
463struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
464 const unsigned char *addr, __u16 vid);
465int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
466int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
467 unsigned long off);
468int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
469 const unsigned char *addr, u16 vid);
470void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
471 const unsigned char *addr, u16 vid, bool added_by_user);
472
473int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
474 struct net_device *dev, const unsigned char *addr, u16 vid);
475int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
476 const unsigned char *addr, u16 vid, u16 nlh_flags);
477int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
478 struct net_device *dev, struct net_device *fdev, int idx);
479int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
480void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
481int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
482 const unsigned char *addr, u16 vid);
483int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
484 const unsigned char *addr, u16 vid);
485
486/* br_forward.c */
487void br_deliver(const struct net_bridge_port *to, struct sk_buff *skb);
488int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
489void br_forward(const struct net_bridge_port *to,
490 struct sk_buff *skb, struct sk_buff *skb0);
491int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
492void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb, bool unicast);
493void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
494 struct sk_buff *skb2, bool unicast);
495
496/* br_if.c */
497void br_port_carrier_check(struct net_bridge_port *p);
498int br_add_bridge(struct net *net, const char *name);
499int br_del_bridge(struct net *net, const char *name);
500int br_add_if(struct net_bridge *br, struct net_device *dev);
501int br_del_if(struct net_bridge *br, struct net_device *dev);
502int br_min_mtu(const struct net_bridge *br);
503netdev_features_t br_features_recompute(struct net_bridge *br,
504 netdev_features_t features);
505void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
506void br_manage_promisc(struct net_bridge *br);
507
508/* br_input.c */
509int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
510rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
511
512static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
513{
514 return rcu_dereference(dev->rx_handler) == br_handle_frame;
515}
516
517static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
518{
519 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
520}
521
522/* br_ioctl.c */
523int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
524int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
525 void __user *arg);
526
527/* br_multicast.c */
528#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
529extern unsigned int br_mdb_rehash_seq;
530int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
531 struct sk_buff *skb, u16 vid);
532struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
533 struct sk_buff *skb, u16 vid);
534void br_multicast_add_port(struct net_bridge_port *port);
535void br_multicast_del_port(struct net_bridge_port *port);
536void br_multicast_enable_port(struct net_bridge_port *port);
537void br_multicast_disable_port(struct net_bridge_port *port);
538void br_multicast_init(struct net_bridge *br);
539void br_multicast_open(struct net_bridge *br);
540void br_multicast_stop(struct net_bridge *br);
541void br_multicast_dev_del(struct net_bridge *br);
542void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
543 struct sk_buff *skb);
544void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
545 struct sk_buff *skb, struct sk_buff *skb2);
546int br_multicast_set_router(struct net_bridge *br, unsigned long val);
547int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
548int br_multicast_toggle(struct net_bridge *br, unsigned long val);
549int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
550int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
551struct net_bridge_mdb_entry *
552br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
553struct net_bridge_mdb_entry *
554br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
555 struct br_ip *group);
556void br_multicast_free_pg(struct rcu_head *head);
557struct net_bridge_port_group *
558br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
559 struct net_bridge_port_group __rcu *next,
560 unsigned char flags);
561void br_mdb_init(void);
562void br_mdb_uninit(void);
563void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
564 struct br_ip *group, int type, u8 flags);
565void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
566 int type);
567
568#define mlock_dereference(X, br) \
569 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
570
571static inline bool br_multicast_is_router(struct net_bridge *br)
572{
573 return br->multicast_router == 2 ||
574 (br->multicast_router == 1 &&
575 timer_pending(&br->multicast_router_timer));
576}
577
578static inline bool
579__br_multicast_querier_exists(struct net_bridge *br,
580 struct bridge_mcast_other_query *querier)
581{
582 return time_is_before_jiffies(querier->delay_time) &&
583 (br->multicast_querier || timer_pending(&querier->timer));
584}
585
586static inline bool br_multicast_querier_exists(struct net_bridge *br,
587 struct ethhdr *eth)
588{
589 switch (eth->h_proto) {
590 case (htons(ETH_P_IP)):
591 return __br_multicast_querier_exists(br, &br->ip4_other_query);
592#if IS_ENABLED(CONFIG_IPV6)
593 case (htons(ETH_P_IPV6)):
594 return __br_multicast_querier_exists(br, &br->ip6_other_query);
595#endif
596 default:
597 return false;
598 }
599}
600#else
601static inline int br_multicast_rcv(struct net_bridge *br,
602 struct net_bridge_port *port,
603 struct sk_buff *skb,
604 u16 vid)
605{
606 return 0;
607}
608
609static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
610 struct sk_buff *skb, u16 vid)
611{
612 return NULL;
613}
614
615static inline void br_multicast_add_port(struct net_bridge_port *port)
616{
617}
618
619static inline void br_multicast_del_port(struct net_bridge_port *port)
620{
621}
622
623static inline void br_multicast_enable_port(struct net_bridge_port *port)
624{
625}
626
627static inline void br_multicast_disable_port(struct net_bridge_port *port)
628{
629}
630
631static inline void br_multicast_init(struct net_bridge *br)
632{
633}
634
635static inline void br_multicast_open(struct net_bridge *br)
636{
637}
638
639static inline void br_multicast_stop(struct net_bridge *br)
640{
641}
642
643static inline void br_multicast_dev_del(struct net_bridge *br)
644{
645}
646
647static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
648 struct sk_buff *skb)
649{
650}
651
652static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
653 struct sk_buff *skb,
654 struct sk_buff *skb2)
655{
656}
657static inline bool br_multicast_is_router(struct net_bridge *br)
658{
659 return 0;
660}
661static inline bool br_multicast_querier_exists(struct net_bridge *br,
662 struct ethhdr *eth)
663{
664 return false;
665}
666static inline void br_mdb_init(void)
667{
668}
669static inline void br_mdb_uninit(void)
670{
671}
672#endif
673
674/* br_vlan.c */
675#ifdef CONFIG_BRIDGE_VLAN_FILTERING
676bool br_allowed_ingress(const struct net_bridge *br,
677 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
678 u16 *vid);
679bool br_allowed_egress(struct net_bridge_vlan_group *vg,
680 const struct sk_buff *skb);
681bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
682struct sk_buff *br_handle_vlan(struct net_bridge *br,
683 struct net_bridge_vlan_group *vg,
684 struct sk_buff *skb);
685int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags);
686int br_vlan_delete(struct net_bridge *br, u16 vid);
687void br_vlan_flush(struct net_bridge *br);
688struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
689void br_recalculate_fwd_mask(struct net_bridge *br);
690int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
691int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
692int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
693int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
694int br_vlan_init(struct net_bridge *br);
695int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
696int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
697int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags);
698int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
699void nbp_vlan_flush(struct net_bridge_port *port);
700int nbp_vlan_init(struct net_bridge_port *port);
701int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
702
703static inline struct net_bridge_vlan_group *br_vlan_group(
704 const struct net_bridge *br)
705{
706 return rtnl_dereference(br->vlgrp);
707}
708
709static inline struct net_bridge_vlan_group *nbp_vlan_group(
710 const struct net_bridge_port *p)
711{
712 return rtnl_dereference(p->vlgrp);
713}
714
715static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
716 const struct net_bridge *br)
717{
718 return rcu_dereference(br->vlgrp);
719}
720
721static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
722 const struct net_bridge_port *p)
723{
724 return rcu_dereference(p->vlgrp);
725}
726
727/* Since bridge now depends on 8021Q module, but the time bridge sees the
728 * skb, the vlan tag will always be present if the frame was tagged.
729 */
730static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
731{
732 int err = 0;
733
734 if (skb_vlan_tag_present(skb)) {
735 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
736 } else {
737 *vid = 0;
738 err = -EINVAL;
739 }
740
741 return err;
742}
743
744static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
745{
746 if (!vg)
747 return 0;
748
749 smp_rmb();
750 return vg->pvid;
751}
752
753static inline int br_vlan_enabled(struct net_bridge *br)
754{
755 return br->vlan_enabled;
756}
757#else
758static inline bool br_allowed_ingress(const struct net_bridge *br,
759 struct net_bridge_vlan_group *vg,
760 struct sk_buff *skb,
761 u16 *vid)
762{
763 return true;
764}
765
766static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
767 const struct sk_buff *skb)
768{
769 return true;
770}
771
772static inline bool br_should_learn(struct net_bridge_port *p,
773 struct sk_buff *skb, u16 *vid)
774{
775 return true;
776}
777
778static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
779 struct net_bridge_vlan_group *vg,
780 struct sk_buff *skb)
781{
782 return skb;
783}
784
785static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags)
786{
787 return -EOPNOTSUPP;
788}
789
790static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
791{
792 return -EOPNOTSUPP;
793}
794
795static inline void br_vlan_flush(struct net_bridge *br)
796{
797}
798
799static inline void br_recalculate_fwd_mask(struct net_bridge *br)
800{
801}
802
803static inline int br_vlan_init(struct net_bridge *br)
804{
805 return 0;
806}
807
808static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags)
809{
810 return -EOPNOTSUPP;
811}
812
813static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
814{
815 return -EOPNOTSUPP;
816}
817
818static inline void nbp_vlan_flush(struct net_bridge_port *port)
819{
820}
821
822static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
823 u16 vid)
824{
825 return NULL;
826}
827
828static inline int nbp_vlan_init(struct net_bridge_port *port)
829{
830 return 0;
831}
832
833static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
834{
835 return 0;
836}
837
838static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
839{
840 return 0;
841}
842
843static inline int br_vlan_enabled(struct net_bridge *br)
844{
845 return 0;
846}
847
848static inline int __br_vlan_filter_toggle(struct net_bridge *br,
849 unsigned long val)
850{
851 return -EOPNOTSUPP;
852}
853
854static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
855 u32 filter_mask)
856{
857 return 0;
858}
859
860static inline struct net_bridge_vlan_group *br_vlan_group(
861 const struct net_bridge *br)
862{
863 return NULL;
864}
865
866static inline struct net_bridge_vlan_group *nbp_vlan_group(
867 const struct net_bridge_port *p)
868{
869 return NULL;
870}
871
872static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
873 const struct net_bridge *br)
874{
875 return NULL;
876}
877
878static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
879 const struct net_bridge_port *p)
880{
881 return NULL;
882}
883
884#endif
885
886struct nf_br_ops {
887 int (*br_dev_xmit_hook)(struct sk_buff *skb);
888};
889extern const struct nf_br_ops __rcu *nf_br_ops;
890
891/* br_netfilter.c */
892#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
893int br_nf_core_init(void);
894void br_nf_core_fini(void);
895void br_netfilter_rtable_init(struct net_bridge *);
896#else
897static inline int br_nf_core_init(void) { return 0; }
898static inline void br_nf_core_fini(void) {}
899#define br_netfilter_rtable_init(x)
900#endif
901
902/* br_stp.c */
903void br_set_state(struct net_bridge_port *p, unsigned int state);
904struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
905void br_init_port(struct net_bridge_port *p);
906void br_become_designated_port(struct net_bridge_port *p);
907
908void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
909int br_set_forward_delay(struct net_bridge *br, unsigned long x);
910int br_set_hello_time(struct net_bridge *br, unsigned long x);
911int br_set_max_age(struct net_bridge *br, unsigned long x);
912int br_set_ageing_time(struct net_bridge *br, u32 ageing_time);
913
914
915/* br_stp_if.c */
916void br_stp_enable_bridge(struct net_bridge *br);
917void br_stp_disable_bridge(struct net_bridge *br);
918void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
919void br_stp_enable_port(struct net_bridge_port *p);
920void br_stp_disable_port(struct net_bridge_port *p);
921bool br_stp_recalculate_bridge_id(struct net_bridge *br);
922void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
923void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
924int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
925int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
926ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
927
928/* br_stp_bpdu.c */
929struct stp_proto;
930void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
931 struct net_device *dev);
932
933/* br_stp_timer.c */
934void br_stp_timer_init(struct net_bridge *br);
935void br_stp_port_timer_init(struct net_bridge_port *p);
936unsigned long br_timer_value(const struct timer_list *timer);
937
938/* br.c */
939#if IS_ENABLED(CONFIG_ATM_LANE)
940extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
941#endif
942
943/* br_netlink.c */
944extern struct rtnl_link_ops br_link_ops;
945int br_netlink_init(void);
946void br_netlink_fini(void);
947void br_ifinfo_notify(int event, struct net_bridge_port *port);
948int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
949int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
950int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
951 u32 filter_mask, int nlflags);
952
953#ifdef CONFIG_SYSFS
954/* br_sysfs_if.c */
955extern const struct sysfs_ops brport_sysfs_ops;
956int br_sysfs_addif(struct net_bridge_port *p);
957int br_sysfs_renameif(struct net_bridge_port *p);
958
959/* br_sysfs_br.c */
960int br_sysfs_addbr(struct net_device *dev);
961void br_sysfs_delbr(struct net_device *dev);
962
963#else
964
965static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
966static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
967static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
968static inline void br_sysfs_delbr(struct net_device *dev) { return; }
969#endif /* CONFIG_SYSFS */
970
971#endif
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#define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
32#define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
33
34#define BR_HWDOM_MAX BITS_PER_LONG
35
36#define BR_VERSION "2.3"
37
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 */
41enum {
42 BR_GROUPFWD_STP = BIT(0),
43 BR_GROUPFWD_MACPAUSE = BIT(1),
44 BR_GROUPFWD_LACP = BIT(2),
45};
46
47#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
48 BR_GROUPFWD_LACP)
49/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
50#define BR_GROUPFWD_8021AD 0xB801u
51
52/* Path to usermode spanning tree program */
53#define BR_STP_PROG "/sbin/bridge-stp"
54
55#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
56
57typedef struct bridge_id bridge_id;
58typedef struct mac_addr mac_addr;
59typedef __u16 port_id;
60
61struct bridge_id {
62 unsigned char prio[2];
63 unsigned char addr[ETH_ALEN];
64};
65
66struct mac_addr {
67 unsigned char addr[ETH_ALEN];
68};
69
70#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
71/* our own querier */
72struct bridge_mcast_own_query {
73 struct timer_list timer;
74 u32 startup_sent;
75};
76
77/* other querier */
78struct bridge_mcast_other_query {
79 struct timer_list timer;
80 unsigned long delay_time;
81};
82
83/* selected querier */
84struct bridge_mcast_querier {
85 struct br_ip addr;
86 int port_ifidx;
87 seqcount_spinlock_t seq;
88};
89
90/* IGMP/MLD statistics */
91struct bridge_mcast_stats {
92 struct br_mcast_stats mstats;
93 struct u64_stats_sync syncp;
94};
95
96struct br_mdb_src_entry {
97 struct br_ip addr;
98};
99
100struct br_mdb_config {
101 struct net_bridge *br;
102 struct net_bridge_port *p;
103 struct br_mdb_entry *entry;
104 struct br_ip group;
105 bool src_entry;
106 u8 filter_mode;
107 u16 nlflags;
108 struct br_mdb_src_entry *src_entries;
109 int num_src_entries;
110 u8 rt_protocol;
111};
112#endif
113
114/* net_bridge_mcast_port must be always defined due to forwarding stubs */
115struct net_bridge_mcast_port {
116#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
117 struct net_bridge_port *port;
118 struct net_bridge_vlan *vlan;
119
120 struct bridge_mcast_own_query ip4_own_query;
121 struct timer_list ip4_mc_router_timer;
122 struct hlist_node ip4_rlist;
123#if IS_ENABLED(CONFIG_IPV6)
124 struct bridge_mcast_own_query ip6_own_query;
125 struct timer_list ip6_mc_router_timer;
126 struct hlist_node ip6_rlist;
127#endif /* IS_ENABLED(CONFIG_IPV6) */
128 unsigned char multicast_router;
129#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
130};
131
132/* net_bridge_mcast must be always defined due to forwarding stubs */
133struct net_bridge_mcast {
134#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
135 struct net_bridge *br;
136 struct net_bridge_vlan *vlan;
137
138 u32 multicast_last_member_count;
139 u32 multicast_startup_query_count;
140
141 u8 multicast_querier;
142 u8 multicast_igmp_version;
143 u8 multicast_router;
144#if IS_ENABLED(CONFIG_IPV6)
145 u8 multicast_mld_version;
146#endif
147 unsigned long multicast_last_member_interval;
148 unsigned long multicast_membership_interval;
149 unsigned long multicast_querier_interval;
150 unsigned long multicast_query_interval;
151 unsigned long multicast_query_response_interval;
152 unsigned long multicast_startup_query_interval;
153 struct hlist_head ip4_mc_router_list;
154 struct timer_list ip4_mc_router_timer;
155 struct bridge_mcast_other_query ip4_other_query;
156 struct bridge_mcast_own_query ip4_own_query;
157 struct bridge_mcast_querier ip4_querier;
158#if IS_ENABLED(CONFIG_IPV6)
159 struct hlist_head ip6_mc_router_list;
160 struct timer_list ip6_mc_router_timer;
161 struct bridge_mcast_other_query ip6_other_query;
162 struct bridge_mcast_own_query ip6_own_query;
163 struct bridge_mcast_querier ip6_querier;
164#endif /* IS_ENABLED(CONFIG_IPV6) */
165#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
166};
167
168struct br_tunnel_info {
169 __be64 tunnel_id;
170 struct metadata_dst __rcu *tunnel_dst;
171};
172
173/* private vlan flags */
174enum {
175 BR_VLFLAG_PER_PORT_STATS = BIT(0),
176 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
177 BR_VLFLAG_MCAST_ENABLED = BIT(2),
178 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
179};
180
181/**
182 * struct net_bridge_vlan - per-vlan entry
183 *
184 * @vnode: rhashtable member
185 * @vid: VLAN id
186 * @flags: bridge vlan flags
187 * @priv_flags: private (in-kernel) bridge vlan flags
188 * @state: STP state (e.g. blocking, learning, forwarding)
189 * @stats: per-cpu VLAN statistics
190 * @br: if MASTER flag set, this points to a bridge struct
191 * @port: if MASTER flag unset, this points to a port struct
192 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
193 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
194 * for this VLAN entry
195 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
196 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
197 * context
198 * @msti: if MASTER flag set, this holds the VLANs MST instance
199 * @vlist: sorted list of VLAN entries
200 * @rcu: used for entry destruction
201 *
202 * This structure is shared between the global per-VLAN entries contained in
203 * the bridge rhashtable and the local per-port per-VLAN entries contained in
204 * the port's rhashtable. The union entries should be interpreted depending on
205 * the entry flags that are set.
206 */
207struct net_bridge_vlan {
208 struct rhash_head vnode;
209 struct rhash_head tnode;
210 u16 vid;
211 u16 flags;
212 u16 priv_flags;
213 u8 state;
214 struct pcpu_sw_netstats __percpu *stats;
215 union {
216 struct net_bridge *br;
217 struct net_bridge_port *port;
218 };
219 union {
220 refcount_t refcnt;
221 struct net_bridge_vlan *brvlan;
222 };
223
224 struct br_tunnel_info tinfo;
225
226 union {
227 struct net_bridge_mcast br_mcast_ctx;
228 struct net_bridge_mcast_port port_mcast_ctx;
229 };
230
231 u16 msti;
232
233 struct list_head vlist;
234
235 struct rcu_head rcu;
236};
237
238/**
239 * struct net_bridge_vlan_group
240 *
241 * @vlan_hash: VLAN entry rhashtable
242 * @vlan_list: sorted VLAN entry list
243 * @num_vlans: number of total VLAN entries
244 * @pvid: PVID VLAN id
245 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
246 *
247 * IMPORTANT: Be careful when checking if there're VLAN entries using list
248 * primitives because the bridge can have entries in its list which
249 * are just for global context but not for filtering, i.e. they have
250 * the master flag set but not the brentry flag. If you have to check
251 * if there're "real" entries in the bridge please test @num_vlans
252 */
253struct net_bridge_vlan_group {
254 struct rhashtable vlan_hash;
255 struct rhashtable tunnel_hash;
256 struct list_head vlan_list;
257 u16 num_vlans;
258 u16 pvid;
259 u8 pvid_state;
260};
261
262/* bridge fdb flags */
263enum {
264 BR_FDB_LOCAL,
265 BR_FDB_STATIC,
266 BR_FDB_STICKY,
267 BR_FDB_ADDED_BY_USER,
268 BR_FDB_ADDED_BY_EXT_LEARN,
269 BR_FDB_OFFLOADED,
270 BR_FDB_NOTIFY,
271 BR_FDB_NOTIFY_INACTIVE,
272 BR_FDB_LOCKED,
273};
274
275struct net_bridge_fdb_key {
276 mac_addr addr;
277 u16 vlan_id;
278};
279
280struct net_bridge_fdb_entry {
281 struct rhash_head rhnode;
282 struct net_bridge_port *dst;
283
284 struct net_bridge_fdb_key key;
285 struct hlist_node fdb_node;
286 unsigned long flags;
287
288 /* write-heavy members should not affect lookups */
289 unsigned long updated ____cacheline_aligned_in_smp;
290 unsigned long used;
291
292 struct rcu_head rcu;
293};
294
295struct net_bridge_fdb_flush_desc {
296 unsigned long flags;
297 unsigned long flags_mask;
298 int port_ifindex;
299 u16 vlan_id;
300};
301
302#define MDB_PG_FLAGS_PERMANENT BIT(0)
303#define MDB_PG_FLAGS_OFFLOAD BIT(1)
304#define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
305#define MDB_PG_FLAGS_STAR_EXCL BIT(3)
306#define MDB_PG_FLAGS_BLOCKED BIT(4)
307
308#define PG_SRC_ENT_LIMIT 32
309
310#define BR_SGRP_F_DELETE BIT(0)
311#define BR_SGRP_F_SEND BIT(1)
312#define BR_SGRP_F_INSTALLED BIT(2)
313#define BR_SGRP_F_USER_ADDED BIT(3)
314
315struct net_bridge_mcast_gc {
316 struct hlist_node gc_node;
317 void (*destroy)(struct net_bridge_mcast_gc *gc);
318};
319
320struct net_bridge_group_src {
321 struct hlist_node node;
322
323 struct br_ip addr;
324 struct net_bridge_port_group *pg;
325 u8 flags;
326 u8 src_query_rexmit_cnt;
327 struct timer_list timer;
328
329 struct net_bridge *br;
330 struct net_bridge_mcast_gc mcast_gc;
331 struct rcu_head rcu;
332};
333
334struct net_bridge_port_group_sg_key {
335 struct net_bridge_port *port;
336 struct br_ip addr;
337};
338
339struct net_bridge_port_group {
340 struct net_bridge_port_group __rcu *next;
341 struct net_bridge_port_group_sg_key key;
342 unsigned char eth_addr[ETH_ALEN] __aligned(2);
343 unsigned char flags;
344 unsigned char filter_mode;
345 unsigned char grp_query_rexmit_cnt;
346 unsigned char rt_protocol;
347
348 struct hlist_head src_list;
349 unsigned int src_ents;
350 struct timer_list timer;
351 struct timer_list rexmit_timer;
352 struct hlist_node mglist;
353 struct rb_root eht_set_tree;
354 struct rb_root eht_host_tree;
355
356 struct rhash_head rhnode;
357 struct net_bridge_mcast_gc mcast_gc;
358 struct rcu_head rcu;
359};
360
361struct net_bridge_mdb_entry {
362 struct rhash_head rhnode;
363 struct net_bridge *br;
364 struct net_bridge_port_group __rcu *ports;
365 struct br_ip addr;
366 bool host_joined;
367
368 struct timer_list timer;
369 struct hlist_node mdb_node;
370
371 struct net_bridge_mcast_gc mcast_gc;
372 struct rcu_head rcu;
373};
374
375struct net_bridge_port {
376 struct net_bridge *br;
377 struct net_device *dev;
378 netdevice_tracker dev_tracker;
379 struct list_head list;
380
381 unsigned long flags;
382#ifdef CONFIG_BRIDGE_VLAN_FILTERING
383 struct net_bridge_vlan_group __rcu *vlgrp;
384#endif
385 struct net_bridge_port __rcu *backup_port;
386
387 /* STP */
388 u8 priority;
389 u8 state;
390 u16 port_no;
391 unsigned char topology_change_ack;
392 unsigned char config_pending;
393 port_id port_id;
394 port_id designated_port;
395 bridge_id designated_root;
396 bridge_id designated_bridge;
397 u32 path_cost;
398 u32 designated_cost;
399 unsigned long designated_age;
400
401 struct timer_list forward_delay_timer;
402 struct timer_list hold_timer;
403 struct timer_list message_age_timer;
404 struct kobject kobj;
405 struct rcu_head rcu;
406
407 struct net_bridge_mcast_port multicast_ctx;
408
409#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
410 struct bridge_mcast_stats __percpu *mcast_stats;
411
412 u32 multicast_eht_hosts_limit;
413 u32 multicast_eht_hosts_cnt;
414 struct hlist_head mglist;
415#endif
416
417#ifdef CONFIG_SYSFS
418 char sysfs_name[IFNAMSIZ];
419#endif
420
421#ifdef CONFIG_NET_POLL_CONTROLLER
422 struct netpoll *np;
423#endif
424#ifdef CONFIG_NET_SWITCHDEV
425 /* Identifier used to group ports that share the same switchdev
426 * hardware domain.
427 */
428 int hwdom;
429 int offload_count;
430 struct netdev_phys_item_id ppid;
431#endif
432 u16 group_fwd_mask;
433 u16 backup_redirected_cnt;
434
435 struct bridge_stp_xstats stp_xstats;
436};
437
438#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
439
440#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
441#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
442
443static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
444{
445 return rcu_dereference(dev->rx_handler_data);
446}
447
448static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
449{
450 return netif_is_bridge_port(dev) ?
451 rtnl_dereference(dev->rx_handler_data) : NULL;
452}
453
454static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
455{
456 return netif_is_bridge_port(dev) ?
457 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
458}
459
460enum net_bridge_opts {
461 BROPT_VLAN_ENABLED,
462 BROPT_VLAN_STATS_ENABLED,
463 BROPT_NF_CALL_IPTABLES,
464 BROPT_NF_CALL_IP6TABLES,
465 BROPT_NF_CALL_ARPTABLES,
466 BROPT_GROUP_ADDR_SET,
467 BROPT_MULTICAST_ENABLED,
468 BROPT_MULTICAST_QUERY_USE_IFADDR,
469 BROPT_MULTICAST_STATS_ENABLED,
470 BROPT_HAS_IPV6_ADDR,
471 BROPT_NEIGH_SUPPRESS_ENABLED,
472 BROPT_MTU_SET_BY_USER,
473 BROPT_VLAN_STATS_PER_PORT,
474 BROPT_NO_LL_LEARN,
475 BROPT_VLAN_BRIDGE_BINDING,
476 BROPT_MCAST_VLAN_SNOOPING_ENABLED,
477 BROPT_MST_ENABLED,
478};
479
480struct net_bridge {
481 spinlock_t lock;
482 spinlock_t hash_lock;
483 struct hlist_head frame_type_list;
484 struct net_device *dev;
485 unsigned long options;
486 /* These fields are accessed on each packet */
487#ifdef CONFIG_BRIDGE_VLAN_FILTERING
488 __be16 vlan_proto;
489 u16 default_pvid;
490 struct net_bridge_vlan_group __rcu *vlgrp;
491#endif
492
493 struct rhashtable fdb_hash_tbl;
494 struct list_head port_list;
495#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
496 union {
497 struct rtable fake_rtable;
498 struct rt6_info fake_rt6_info;
499 };
500#endif
501 u16 group_fwd_mask;
502 u16 group_fwd_mask_required;
503
504 /* STP */
505 bridge_id designated_root;
506 bridge_id bridge_id;
507 unsigned char topology_change;
508 unsigned char topology_change_detected;
509 u16 root_port;
510 unsigned long max_age;
511 unsigned long hello_time;
512 unsigned long forward_delay;
513 unsigned long ageing_time;
514 unsigned long bridge_max_age;
515 unsigned long bridge_hello_time;
516 unsigned long bridge_forward_delay;
517 unsigned long bridge_ageing_time;
518 u32 root_path_cost;
519
520 u8 group_addr[ETH_ALEN];
521
522 enum {
523 BR_NO_STP, /* no spanning tree */
524 BR_KERNEL_STP, /* old STP in kernel */
525 BR_USER_STP, /* new RSTP in userspace */
526 } stp_enabled;
527
528 struct net_bridge_mcast multicast_ctx;
529
530#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
531 struct bridge_mcast_stats __percpu *mcast_stats;
532
533 u32 hash_max;
534
535 spinlock_t multicast_lock;
536
537 struct rhashtable mdb_hash_tbl;
538 struct rhashtable sg_port_tbl;
539
540 struct hlist_head mcast_gc_list;
541 struct hlist_head mdb_list;
542
543 struct work_struct mcast_gc_work;
544#endif
545
546 struct timer_list hello_timer;
547 struct timer_list tcn_timer;
548 struct timer_list topology_change_timer;
549 struct delayed_work gc_work;
550 struct kobject *ifobj;
551 u32 auto_cnt;
552
553#ifdef CONFIG_NET_SWITCHDEV
554 /* Counter used to make sure that hardware domains get unique
555 * identifiers in case a bridge spans multiple switchdev instances.
556 */
557 int last_hwdom;
558 /* Bit mask of hardware domain numbers in use */
559 unsigned long busy_hwdoms;
560#endif
561 struct hlist_head fdb_list;
562
563#if IS_ENABLED(CONFIG_BRIDGE_MRP)
564 struct hlist_head mrp_list;
565#endif
566#if IS_ENABLED(CONFIG_BRIDGE_CFM)
567 struct hlist_head mep_list;
568#endif
569};
570
571struct br_input_skb_cb {
572 struct net_device *brdev;
573
574 u16 frag_max_size;
575#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
576 u8 igmp;
577 u8 mrouters_only:1;
578#endif
579 u8 proxyarp_replied:1;
580 u8 src_port_isolated:1;
581#ifdef CONFIG_BRIDGE_VLAN_FILTERING
582 u8 vlan_filtered:1;
583#endif
584#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
585 u8 br_netfilter_broute:1;
586#endif
587
588#ifdef CONFIG_NET_SWITCHDEV
589 /* Set if TX data plane offloading is used towards at least one
590 * hardware domain.
591 */
592 u8 tx_fwd_offload:1;
593 /* The switchdev hardware domain from which this packet was received.
594 * If skb->offload_fwd_mark was set, then this packet was already
595 * forwarded by hardware to the other ports in the source hardware
596 * domain, otherwise it wasn't.
597 */
598 int src_hwdom;
599 /* Bit mask of hardware domains towards this packet has already been
600 * transmitted using the TX data plane offload.
601 */
602 unsigned long fwd_hwdoms;
603#endif
604};
605
606#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
607
608#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
609# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
610#else
611# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
612#endif
613
614#define br_printk(level, br, format, args...) \
615 printk(level "%s: " format, (br)->dev->name, ##args)
616
617#define br_err(__br, format, args...) \
618 br_printk(KERN_ERR, __br, format, ##args)
619#define br_warn(__br, format, args...) \
620 br_printk(KERN_WARNING, __br, format, ##args)
621#define br_notice(__br, format, args...) \
622 br_printk(KERN_NOTICE, __br, format, ##args)
623#define br_info(__br, format, args...) \
624 br_printk(KERN_INFO, __br, format, ##args)
625
626#define br_debug(br, format, args...) \
627 pr_debug("%s: " format, (br)->dev->name, ##args)
628
629/* called under bridge lock */
630static inline int br_is_root_bridge(const struct net_bridge *br)
631{
632 return !memcmp(&br->bridge_id, &br->designated_root, 8);
633}
634
635/* check if a VLAN entry is global */
636static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
637{
638 return v->flags & BRIDGE_VLAN_INFO_MASTER;
639}
640
641/* check if a VLAN entry is used by the bridge */
642static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
643{
644 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
645}
646
647/* check if we should use the vlan entry, returns false if it's only context */
648static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
649{
650 if (br_vlan_is_master(v)) {
651 if (br_vlan_is_brentry(v))
652 return true;
653 else
654 return false;
655 }
656
657 return true;
658}
659
660static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
661{
662 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
663}
664
665static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
666{
667 bool ret = vid > 0 && vid < VLAN_VID_MASK;
668
669 if (!ret)
670 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
671
672 return ret;
673}
674
675static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
676 const struct bridge_vlan_info *last,
677 struct netlink_ext_ack *extack)
678{
679 /* pvid flag is not allowed in ranges */
680 if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
681 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
682 return false;
683 }
684
685 /* when cur is the range end, check if:
686 * - it has range start flag
687 * - range ids are invalid (end is equal to or before start)
688 */
689 if (last) {
690 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
691 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
692 return false;
693 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
694 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
695 return false;
696 } else if (cur->vid <= last->vid) {
697 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
698 return false;
699 }
700 }
701
702 /* check for required range flags */
703 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
704 BRIDGE_VLAN_INFO_RANGE_END))) {
705 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
706 return false;
707 }
708
709 return true;
710}
711
712static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
713{
714 u8 mcast_router = MDB_RTR_TYPE_DISABLED;
715
716#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
717 if (!br_vlan_is_master(v))
718 mcast_router = v->port_mcast_ctx.multicast_router;
719 else
720 mcast_router = v->br_mcast_ctx.multicast_router;
721#endif
722
723 return mcast_router;
724}
725
726static inline int br_afspec_cmd_to_rtm(int cmd)
727{
728 switch (cmd) {
729 case RTM_SETLINK:
730 return RTM_NEWVLAN;
731 case RTM_DELLINK:
732 return RTM_DELVLAN;
733 }
734
735 return 0;
736}
737
738static inline int br_opt_get(const struct net_bridge *br,
739 enum net_bridge_opts opt)
740{
741 return test_bit(opt, &br->options);
742}
743
744int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
745 struct netlink_ext_ack *extack);
746int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
747int br_boolopt_multi_toggle(struct net_bridge *br,
748 struct br_boolopt_multi *bm,
749 struct netlink_ext_ack *extack);
750void br_boolopt_multi_get(const struct net_bridge *br,
751 struct br_boolopt_multi *bm);
752void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
753
754/* br_device.c */
755void br_dev_setup(struct net_device *dev);
756void br_dev_delete(struct net_device *dev, struct list_head *list);
757netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
758#ifdef CONFIG_NET_POLL_CONTROLLER
759static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
760 struct sk_buff *skb)
761{
762 netpoll_send_skb(p->np, skb);
763}
764
765int br_netpoll_enable(struct net_bridge_port *p);
766void br_netpoll_disable(struct net_bridge_port *p);
767#else
768static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
769 struct sk_buff *skb)
770{
771}
772
773static inline int br_netpoll_enable(struct net_bridge_port *p)
774{
775 return 0;
776}
777
778static inline void br_netpoll_disable(struct net_bridge_port *p)
779{
780}
781#endif
782
783/* br_fdb.c */
784#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
785#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
786#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
787 NTF_STICKY | NTF_OFFLOADED)
788
789int br_fdb_init(void);
790void br_fdb_fini(void);
791int br_fdb_hash_init(struct net_bridge *br);
792void br_fdb_hash_fini(struct net_bridge *br);
793void br_fdb_flush(struct net_bridge *br,
794 const struct net_bridge_fdb_flush_desc *desc);
795void br_fdb_find_delete_local(struct net_bridge *br,
796 const struct net_bridge_port *p,
797 const unsigned char *addr, u16 vid);
798void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
799void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
800void br_fdb_cleanup(struct work_struct *work);
801void br_fdb_delete_by_port(struct net_bridge *br,
802 const struct net_bridge_port *p, u16 vid, int do_all);
803struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
804 const unsigned char *addr,
805 __u16 vid);
806int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
807int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
808 unsigned long off);
809int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
810 const unsigned char *addr, u16 vid);
811void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
812 const unsigned char *addr, u16 vid, unsigned long flags);
813
814int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
815 struct net_device *dev, const unsigned char *addr, u16 vid,
816 struct netlink_ext_ack *extack);
817int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[],
818 struct net_device *dev, u16 vid,
819 struct netlink_ext_ack *extack);
820int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
821 const unsigned char *addr, u16 vid, u16 nlh_flags,
822 struct netlink_ext_ack *extack);
823int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
824 struct net_device *dev, struct net_device *fdev, int *idx);
825int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
826 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
827 struct netlink_ext_ack *extack);
828int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
829void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
830int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
831 const unsigned char *addr, u16 vid,
832 bool locked, bool swdev_notify);
833int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
834 const unsigned char *addr, u16 vid,
835 bool swdev_notify);
836void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
837 const unsigned char *addr, u16 vid, bool offloaded);
838
839/* br_forward.c */
840enum br_pkt_type {
841 BR_PKT_UNICAST,
842 BR_PKT_MULTICAST,
843 BR_PKT_BROADCAST
844};
845int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
846void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
847 bool local_rcv, bool local_orig);
848int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
849void br_flood(struct net_bridge *br, struct sk_buff *skb,
850 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
851
852/* return true if both source port and dest port are isolated */
853static inline bool br_skb_isolated(const struct net_bridge_port *to,
854 const struct sk_buff *skb)
855{
856 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
857 (to->flags & BR_ISOLATED);
858}
859
860/* br_if.c */
861void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
862int br_add_bridge(struct net *net, const char *name);
863int br_del_bridge(struct net *net, const char *name);
864int br_add_if(struct net_bridge *br, struct net_device *dev,
865 struct netlink_ext_ack *extack);
866int br_del_if(struct net_bridge *br, struct net_device *dev);
867void br_mtu_auto_adjust(struct net_bridge *br);
868netdev_features_t br_features_recompute(struct net_bridge *br,
869 netdev_features_t features);
870void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
871void br_manage_promisc(struct net_bridge *br);
872int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
873
874/* br_input.c */
875int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
876rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
877
878struct br_frame_type {
879 __be16 type;
880 int (*frame_handler)(struct net_bridge_port *port,
881 struct sk_buff *skb);
882 struct hlist_node list;
883};
884
885void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
886void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
887
888static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
889{
890 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
891}
892
893static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
894{
895 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
896}
897
898static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
899{
900 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
901}
902
903static inline struct net_bridge_port *
904br_port_get_check_rtnl(const struct net_device *dev)
905{
906 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
907}
908
909/* br_ioctl.c */
910int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
911 void __user *data, int cmd);
912int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
913 struct ifreq *ifr, void __user *uarg);
914
915/* br_multicast.c */
916#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
917int br_multicast_rcv(struct net_bridge_mcast **brmctx,
918 struct net_bridge_mcast_port **pmctx,
919 struct net_bridge_vlan *vlan,
920 struct sk_buff *skb, u16 vid);
921struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
922 struct sk_buff *skb, u16 vid);
923int br_multicast_add_port(struct net_bridge_port *port);
924void br_multicast_del_port(struct net_bridge_port *port);
925void br_multicast_enable_port(struct net_bridge_port *port);
926void br_multicast_disable_port(struct net_bridge_port *port);
927void br_multicast_init(struct net_bridge *br);
928void br_multicast_join_snoopers(struct net_bridge *br);
929void br_multicast_leave_snoopers(struct net_bridge *br);
930void br_multicast_open(struct net_bridge *br);
931void br_multicast_stop(struct net_bridge *br);
932void br_multicast_dev_del(struct net_bridge *br);
933void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
934 struct net_bridge_mcast *brmctx,
935 bool local_rcv, bool local_orig);
936int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
937int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
938 unsigned long val);
939int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
940int br_multicast_toggle(struct net_bridge *br, unsigned long val,
941 struct netlink_ext_ack *extack);
942int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
943int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
944int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
945 unsigned long val);
946#if IS_ENABLED(CONFIG_IPV6)
947int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
948 unsigned long val);
949#endif
950struct net_bridge_mdb_entry *
951br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
952struct net_bridge_mdb_entry *
953br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
954struct net_bridge_port_group *
955br_multicast_new_port_group(struct net_bridge_port *port,
956 const struct br_ip *group,
957 struct net_bridge_port_group __rcu *next,
958 unsigned char flags, const unsigned char *src,
959 u8 filter_mode, u8 rt_protocol);
960int br_mdb_hash_init(struct net_bridge *br);
961void br_mdb_hash_fini(struct net_bridge *br);
962void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
963 struct net_bridge_port_group *pg, int type);
964void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
965 int type);
966void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
967 struct net_bridge_port_group *pg,
968 struct net_bridge_port_group __rcu **pp);
969void br_multicast_count(struct net_bridge *br,
970 const struct net_bridge_port *p,
971 const struct sk_buff *skb, u8 type, u8 dir);
972int br_multicast_init_stats(struct net_bridge *br);
973void br_multicast_uninit_stats(struct net_bridge *br);
974void br_multicast_get_stats(const struct net_bridge *br,
975 const struct net_bridge_port *p,
976 struct br_mcast_stats *dest);
977void br_mdb_init(void);
978void br_mdb_uninit(void);
979void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
980 struct net_bridge_mdb_entry *mp, bool notify);
981void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
982void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
983 u8 filter_mode);
984void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
985 struct net_bridge_port_group *sg);
986struct net_bridge_group_src *
987br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
988struct net_bridge_group_src *
989br_multicast_new_group_src(struct net_bridge_port_group *pg,
990 struct br_ip *src_ip);
991void __br_multicast_del_group_src(struct net_bridge_group_src *src);
992void br_multicast_del_group_src(struct net_bridge_group_src *src,
993 bool fastleave);
994void br_multicast_ctx_init(struct net_bridge *br,
995 struct net_bridge_vlan *vlan,
996 struct net_bridge_mcast *brmctx);
997void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
998void br_multicast_port_ctx_init(struct net_bridge_port *port,
999 struct net_bridge_vlan *vlan,
1000 struct net_bridge_mcast_port *pmctx);
1001void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1002void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1003int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1004 struct netlink_ext_ack *extack);
1005bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1006
1007int br_rports_fill_info(struct sk_buff *skb,
1008 const struct net_bridge_mcast *brmctx);
1009int br_multicast_dump_querier_state(struct sk_buff *skb,
1010 const struct net_bridge_mcast *brmctx,
1011 int nest_attr);
1012size_t br_multicast_querier_state_size(void);
1013size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1014void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1015 unsigned long val);
1016void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1017 unsigned long val);
1018
1019static inline bool br_group_is_l2(const struct br_ip *group)
1020{
1021 return group->proto == 0;
1022}
1023
1024#define mlock_dereference(X, br) \
1025 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1026
1027static inline struct hlist_node *
1028br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1029 struct sk_buff *skb)
1030{
1031#if IS_ENABLED(CONFIG_IPV6)
1032 if (skb->protocol == htons(ETH_P_IPV6))
1033 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1034#endif
1035 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1036}
1037
1038static inline struct net_bridge_port *
1039br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1040{
1041 struct net_bridge_mcast_port *mctx;
1042
1043#if IS_ENABLED(CONFIG_IPV6)
1044 if (skb->protocol == htons(ETH_P_IPV6))
1045 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1046 ip6_rlist);
1047 else
1048#endif
1049 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1050 ip4_rlist);
1051
1052 if (mctx)
1053 return mctx->port;
1054 else
1055 return NULL;
1056}
1057
1058static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1059{
1060 return timer_pending(&brmctx->ip4_mc_router_timer);
1061}
1062
1063static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1064{
1065#if IS_ENABLED(CONFIG_IPV6)
1066 return timer_pending(&brmctx->ip6_mc_router_timer);
1067#else
1068 return false;
1069#endif
1070}
1071
1072static inline bool
1073br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1074{
1075 switch (brmctx->multicast_router) {
1076 case MDB_RTR_TYPE_PERM:
1077 return true;
1078 case MDB_RTR_TYPE_TEMP_QUERY:
1079 if (skb) {
1080 if (skb->protocol == htons(ETH_P_IP))
1081 return br_ip4_multicast_is_router(brmctx);
1082 else if (skb->protocol == htons(ETH_P_IPV6))
1083 return br_ip6_multicast_is_router(brmctx);
1084 } else {
1085 return br_ip4_multicast_is_router(brmctx) ||
1086 br_ip6_multicast_is_router(brmctx);
1087 }
1088 fallthrough;
1089 default:
1090 return false;
1091 }
1092}
1093
1094static inline bool
1095__br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1096 struct bridge_mcast_other_query *querier,
1097 const bool is_ipv6)
1098{
1099 bool own_querier_enabled;
1100
1101 if (brmctx->multicast_querier) {
1102 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1103 own_querier_enabled = false;
1104 else
1105 own_querier_enabled = true;
1106 } else {
1107 own_querier_enabled = false;
1108 }
1109
1110 return time_is_before_jiffies(querier->delay_time) &&
1111 (own_querier_enabled || timer_pending(&querier->timer));
1112}
1113
1114static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1115 struct ethhdr *eth,
1116 const struct net_bridge_mdb_entry *mdb)
1117{
1118 switch (eth->h_proto) {
1119 case (htons(ETH_P_IP)):
1120 return __br_multicast_querier_exists(brmctx,
1121 &brmctx->ip4_other_query, false);
1122#if IS_ENABLED(CONFIG_IPV6)
1123 case (htons(ETH_P_IPV6)):
1124 return __br_multicast_querier_exists(brmctx,
1125 &brmctx->ip6_other_query, true);
1126#endif
1127 default:
1128 return !!mdb && br_group_is_l2(&mdb->addr);
1129 }
1130}
1131
1132static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1133{
1134 switch (ip->proto) {
1135 case htons(ETH_P_IP):
1136 return ipv4_is_zeronet(ip->src.ip4);
1137#if IS_ENABLED(CONFIG_IPV6)
1138 case htons(ETH_P_IPV6):
1139 return ipv6_addr_any(&ip->src.ip6);
1140#endif
1141 default:
1142 return false;
1143 }
1144}
1145
1146static inline bool
1147br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1148 __be16 proto)
1149{
1150 switch (proto) {
1151 case htons(ETH_P_IP):
1152 return !!(brmctx->multicast_igmp_version == 3);
1153#if IS_ENABLED(CONFIG_IPV6)
1154 case htons(ETH_P_IPV6):
1155 return !!(brmctx->multicast_mld_version == 2);
1156#endif
1157 default:
1158 return false;
1159 }
1160}
1161
1162static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1163{
1164 return BR_INPUT_SKB_CB(skb)->igmp;
1165}
1166
1167static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1168{
1169 return brmctx->multicast_last_member_interval *
1170 brmctx->multicast_last_member_count;
1171}
1172
1173static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1174{
1175 return brmctx->multicast_membership_interval;
1176}
1177
1178static inline bool
1179br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1180{
1181 return !!brmctx->vlan;
1182}
1183
1184static inline bool
1185br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1186{
1187 return !!pmctx->vlan;
1188}
1189
1190static inline struct net_bridge_mcast *
1191br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1192{
1193 if (!br_multicast_port_ctx_is_vlan(pmctx))
1194 return &pmctx->port->br->multicast_ctx;
1195 else
1196 return &pmctx->vlan->brvlan->br_mcast_ctx;
1197}
1198
1199static inline bool
1200br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1201{
1202 return br_multicast_ctx_is_vlan(brmctx) &&
1203 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1204 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1205}
1206
1207static inline bool
1208br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1209{
1210 return br_multicast_ctx_is_vlan(brmctx) &&
1211 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1212}
1213
1214static inline bool
1215br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1216{
1217 return br_multicast_port_ctx_is_vlan(pmctx) &&
1218 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1219}
1220
1221static inline bool
1222br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1223{
1224 return pmctx->port->state == BR_STATE_DISABLED ||
1225 (br_multicast_port_ctx_is_vlan(pmctx) &&
1226 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1227 pmctx->vlan->state == BR_STATE_DISABLED));
1228}
1229
1230static inline bool
1231br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1232{
1233 return br_multicast_port_ctx_state_disabled(pmctx) ||
1234 pmctx->port->state == BR_STATE_BLOCKING ||
1235 (br_multicast_port_ctx_is_vlan(pmctx) &&
1236 pmctx->vlan->state == BR_STATE_BLOCKING);
1237}
1238
1239static inline bool
1240br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1241{
1242#if IS_ENABLED(CONFIG_IPV6)
1243 return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1244 !hlist_empty(&brmctx->ip6_mc_router_list);
1245#else
1246 return !hlist_empty(&brmctx->ip4_mc_router_list);
1247#endif
1248}
1249
1250static inline bool
1251br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1252 const struct net_bridge_mcast *brmctx2)
1253{
1254 return brmctx1->multicast_igmp_version ==
1255 brmctx2->multicast_igmp_version &&
1256 brmctx1->multicast_last_member_count ==
1257 brmctx2->multicast_last_member_count &&
1258 brmctx1->multicast_startup_query_count ==
1259 brmctx2->multicast_startup_query_count &&
1260 brmctx1->multicast_last_member_interval ==
1261 brmctx2->multicast_last_member_interval &&
1262 brmctx1->multicast_membership_interval ==
1263 brmctx2->multicast_membership_interval &&
1264 brmctx1->multicast_querier_interval ==
1265 brmctx2->multicast_querier_interval &&
1266 brmctx1->multicast_query_interval ==
1267 brmctx2->multicast_query_interval &&
1268 brmctx1->multicast_query_response_interval ==
1269 brmctx2->multicast_query_response_interval &&
1270 brmctx1->multicast_startup_query_interval ==
1271 brmctx2->multicast_startup_query_interval &&
1272 brmctx1->multicast_querier == brmctx2->multicast_querier &&
1273 brmctx1->multicast_router == brmctx2->multicast_router &&
1274 !br_rports_have_mc_router(brmctx1) &&
1275 !br_rports_have_mc_router(brmctx2) &&
1276#if IS_ENABLED(CONFIG_IPV6)
1277 brmctx1->multicast_mld_version ==
1278 brmctx2->multicast_mld_version &&
1279#endif
1280 true;
1281}
1282
1283static inline bool
1284br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1285{
1286 bool vlan_snooping_enabled;
1287
1288 vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1289 BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1290
1291 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1292}
1293#else
1294static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1295 struct net_bridge_mcast_port **pmctx,
1296 struct net_bridge_vlan *vlan,
1297 struct sk_buff *skb,
1298 u16 vid)
1299{
1300 return 0;
1301}
1302
1303static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1304 struct sk_buff *skb, u16 vid)
1305{
1306 return NULL;
1307}
1308
1309static inline int br_multicast_add_port(struct net_bridge_port *port)
1310{
1311 return 0;
1312}
1313
1314static inline void br_multicast_del_port(struct net_bridge_port *port)
1315{
1316}
1317
1318static inline void br_multicast_enable_port(struct net_bridge_port *port)
1319{
1320}
1321
1322static inline void br_multicast_disable_port(struct net_bridge_port *port)
1323{
1324}
1325
1326static inline void br_multicast_init(struct net_bridge *br)
1327{
1328}
1329
1330static inline void br_multicast_join_snoopers(struct net_bridge *br)
1331{
1332}
1333
1334static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1335{
1336}
1337
1338static inline void br_multicast_open(struct net_bridge *br)
1339{
1340}
1341
1342static inline void br_multicast_stop(struct net_bridge *br)
1343{
1344}
1345
1346static inline void br_multicast_dev_del(struct net_bridge *br)
1347{
1348}
1349
1350static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1351 struct sk_buff *skb,
1352 struct net_bridge_mcast *brmctx,
1353 bool local_rcv, bool local_orig)
1354{
1355}
1356
1357static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1358 struct sk_buff *skb)
1359{
1360 return false;
1361}
1362
1363static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1364 struct ethhdr *eth,
1365 const struct net_bridge_mdb_entry *mdb)
1366{
1367 return false;
1368}
1369
1370static inline void br_mdb_init(void)
1371{
1372}
1373
1374static inline void br_mdb_uninit(void)
1375{
1376}
1377
1378static inline int br_mdb_hash_init(struct net_bridge *br)
1379{
1380 return 0;
1381}
1382
1383static inline void br_mdb_hash_fini(struct net_bridge *br)
1384{
1385}
1386
1387static inline void br_multicast_count(struct net_bridge *br,
1388 const struct net_bridge_port *p,
1389 const struct sk_buff *skb,
1390 u8 type, u8 dir)
1391{
1392}
1393
1394static inline int br_multicast_init_stats(struct net_bridge *br)
1395{
1396 return 0;
1397}
1398
1399static inline void br_multicast_uninit_stats(struct net_bridge *br)
1400{
1401}
1402
1403static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1404{
1405 return 0;
1406}
1407
1408static inline void br_multicast_ctx_init(struct net_bridge *br,
1409 struct net_bridge_vlan *vlan,
1410 struct net_bridge_mcast *brmctx)
1411{
1412}
1413
1414static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1415{
1416}
1417
1418static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1419 struct net_bridge_vlan *vlan,
1420 struct net_bridge_mcast_port *pmctx)
1421{
1422}
1423
1424static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1425{
1426}
1427
1428static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1429 bool on)
1430{
1431}
1432
1433static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1434 bool on,
1435 struct netlink_ext_ack *extack)
1436{
1437 return -EOPNOTSUPP;
1438}
1439
1440static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1441 bool on)
1442{
1443 return false;
1444}
1445
1446static inline bool
1447br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1448 const struct net_bridge_mcast *brmctx2)
1449{
1450 return true;
1451}
1452#endif
1453
1454/* br_vlan.c */
1455#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1456bool br_allowed_ingress(const struct net_bridge *br,
1457 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1458 u16 *vid, u8 *state,
1459 struct net_bridge_vlan **vlan);
1460bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1461 const struct sk_buff *skb);
1462bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1463struct sk_buff *br_handle_vlan(struct net_bridge *br,
1464 const struct net_bridge_port *port,
1465 struct net_bridge_vlan_group *vg,
1466 struct sk_buff *skb);
1467int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1468 bool *changed, struct netlink_ext_ack *extack);
1469int br_vlan_delete(struct net_bridge *br, u16 vid);
1470void br_vlan_flush(struct net_bridge *br);
1471struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1472void br_recalculate_fwd_mask(struct net_bridge *br);
1473int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1474 struct netlink_ext_ack *extack);
1475int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1476 struct netlink_ext_ack *extack);
1477int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1478 struct netlink_ext_ack *extack);
1479int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1480int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1481int br_vlan_init(struct net_bridge *br);
1482int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1483 struct netlink_ext_ack *extack);
1484int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1485 struct netlink_ext_ack *extack);
1486int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1487 bool *changed, struct netlink_ext_ack *extack);
1488int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1489void nbp_vlan_flush(struct net_bridge_port *port);
1490int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1491int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1492void br_vlan_get_stats(const struct net_bridge_vlan *v,
1493 struct pcpu_sw_netstats *stats);
1494void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1495int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1496 void *ptr);
1497void br_vlan_rtnl_init(void);
1498void br_vlan_rtnl_uninit(void);
1499void br_vlan_notify(const struct net_bridge *br,
1500 const struct net_bridge_port *p,
1501 u16 vid, u16 vid_range,
1502 int cmd);
1503bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1504 const struct net_bridge_vlan *range_end);
1505
1506void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1507 struct net_device_path_ctx *ctx,
1508 struct net_device_path *path);
1509int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1510 struct net_bridge_port *dst,
1511 struct net_device_path *path);
1512
1513static inline struct net_bridge_vlan_group *br_vlan_group(
1514 const struct net_bridge *br)
1515{
1516 return rtnl_dereference(br->vlgrp);
1517}
1518
1519static inline struct net_bridge_vlan_group *nbp_vlan_group(
1520 const struct net_bridge_port *p)
1521{
1522 return rtnl_dereference(p->vlgrp);
1523}
1524
1525static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1526 const struct net_bridge *br)
1527{
1528 return rcu_dereference(br->vlgrp);
1529}
1530
1531static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1532 const struct net_bridge_port *p)
1533{
1534 return rcu_dereference(p->vlgrp);
1535}
1536
1537/* Since bridge now depends on 8021Q module, but the time bridge sees the
1538 * skb, the vlan tag will always be present if the frame was tagged.
1539 */
1540static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1541{
1542 int err = 0;
1543
1544 if (skb_vlan_tag_present(skb)) {
1545 *vid = skb_vlan_tag_get_id(skb);
1546 } else {
1547 *vid = 0;
1548 err = -EINVAL;
1549 }
1550
1551 return err;
1552}
1553
1554static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1555{
1556 if (!vg)
1557 return 0;
1558
1559 smp_rmb();
1560 return vg->pvid;
1561}
1562
1563static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1564{
1565 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1566}
1567#else
1568static inline bool br_allowed_ingress(const struct net_bridge *br,
1569 struct net_bridge_vlan_group *vg,
1570 struct sk_buff *skb,
1571 u16 *vid, u8 *state,
1572 struct net_bridge_vlan **vlan)
1573
1574{
1575 *vlan = NULL;
1576 return true;
1577}
1578
1579static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1580 const struct sk_buff *skb)
1581{
1582 return true;
1583}
1584
1585static inline bool br_should_learn(struct net_bridge_port *p,
1586 struct sk_buff *skb, u16 *vid)
1587{
1588 return true;
1589}
1590
1591static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1592 const struct net_bridge_port *port,
1593 struct net_bridge_vlan_group *vg,
1594 struct sk_buff *skb)
1595{
1596 return skb;
1597}
1598
1599static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1600 bool *changed, struct netlink_ext_ack *extack)
1601{
1602 *changed = false;
1603 return -EOPNOTSUPP;
1604}
1605
1606static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1607{
1608 return -EOPNOTSUPP;
1609}
1610
1611static inline void br_vlan_flush(struct net_bridge *br)
1612{
1613}
1614
1615static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1616{
1617}
1618
1619static inline int br_vlan_init(struct net_bridge *br)
1620{
1621 return 0;
1622}
1623
1624static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1625 bool *changed, struct netlink_ext_ack *extack)
1626{
1627 *changed = false;
1628 return -EOPNOTSUPP;
1629}
1630
1631static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1632{
1633 return -EOPNOTSUPP;
1634}
1635
1636static inline void nbp_vlan_flush(struct net_bridge_port *port)
1637{
1638}
1639
1640static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1641 u16 vid)
1642{
1643 return NULL;
1644}
1645
1646static inline int nbp_vlan_init(struct net_bridge_port *port,
1647 struct netlink_ext_ack *extack)
1648{
1649 return 0;
1650}
1651
1652static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1653{
1654 return 0;
1655}
1656
1657static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1658{
1659 return 0;
1660}
1661
1662static inline int br_vlan_filter_toggle(struct net_bridge *br,
1663 unsigned long val,
1664 struct netlink_ext_ack *extack)
1665{
1666 return -EOPNOTSUPP;
1667}
1668
1669static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1670 u32 filter_mask)
1671{
1672 return 0;
1673}
1674
1675static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1676 struct net_device_path_ctx *ctx,
1677 struct net_device_path *path)
1678{
1679}
1680
1681static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1682 struct net_bridge_port *dst,
1683 struct net_device_path *path)
1684{
1685 return 0;
1686}
1687
1688static inline struct net_bridge_vlan_group *br_vlan_group(
1689 const struct net_bridge *br)
1690{
1691 return NULL;
1692}
1693
1694static inline struct net_bridge_vlan_group *nbp_vlan_group(
1695 const struct net_bridge_port *p)
1696{
1697 return NULL;
1698}
1699
1700static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1701 const struct net_bridge *br)
1702{
1703 return NULL;
1704}
1705
1706static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1707 const struct net_bridge_port *p)
1708{
1709 return NULL;
1710}
1711
1712static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1713 struct pcpu_sw_netstats *stats)
1714{
1715}
1716
1717static inline void br_vlan_port_event(struct net_bridge_port *p,
1718 unsigned long event)
1719{
1720}
1721
1722static inline int br_vlan_bridge_event(struct net_device *dev,
1723 unsigned long event, void *ptr)
1724{
1725 return 0;
1726}
1727
1728static inline void br_vlan_rtnl_init(void)
1729{
1730}
1731
1732static inline void br_vlan_rtnl_uninit(void)
1733{
1734}
1735
1736static inline void br_vlan_notify(const struct net_bridge *br,
1737 const struct net_bridge_port *p,
1738 u16 vid, u16 vid_range,
1739 int cmd)
1740{
1741}
1742
1743static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1744 const struct net_bridge_vlan *range_end)
1745{
1746 return true;
1747}
1748
1749static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1750{
1751 return 0;
1752}
1753
1754#endif
1755
1756/* br_vlan_options.c */
1757#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1758bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1759 const struct net_bridge_vlan *range_end);
1760bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1761size_t br_vlan_opts_nl_size(void);
1762int br_vlan_process_options(const struct net_bridge *br,
1763 const struct net_bridge_port *p,
1764 struct net_bridge_vlan *range_start,
1765 struct net_bridge_vlan *range_end,
1766 struct nlattr **tb,
1767 struct netlink_ext_ack *extack);
1768int br_vlan_rtm_process_global_options(struct net_device *dev,
1769 const struct nlattr *attr,
1770 int cmd,
1771 struct netlink_ext_ack *extack);
1772bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1773 const struct net_bridge_vlan *r_end);
1774bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1775 const struct net_bridge_vlan *v_opts);
1776
1777/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1778static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1779{
1780 return READ_ONCE(v->state);
1781}
1782
1783static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1784{
1785 WRITE_ONCE(v->state, state);
1786}
1787
1788static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1789{
1790 return READ_ONCE(vg->pvid_state);
1791}
1792
1793static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1794 u8 state)
1795{
1796 WRITE_ONCE(vg->pvid_state, state);
1797}
1798
1799/* learn_allow is true at ingress and false at egress */
1800static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1801{
1802 switch (state) {
1803 case BR_STATE_LEARNING:
1804 return learn_allow;
1805 case BR_STATE_FORWARDING:
1806 return true;
1807 default:
1808 return false;
1809 }
1810}
1811#endif
1812
1813/* br_mst.c */
1814#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1815DECLARE_STATIC_KEY_FALSE(br_mst_used);
1816static inline bool br_mst_is_enabled(struct net_bridge *br)
1817{
1818 return static_branch_unlikely(&br_mst_used) &&
1819 br_opt_get(br, BROPT_MST_ENABLED);
1820}
1821
1822int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1823 struct netlink_ext_ack *extack);
1824int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1825void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1826int br_mst_set_enabled(struct net_bridge *br, bool on,
1827 struct netlink_ext_ack *extack);
1828size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1829int br_mst_fill_info(struct sk_buff *skb,
1830 const struct net_bridge_vlan_group *vg);
1831int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1832 struct netlink_ext_ack *extack);
1833#else
1834static inline bool br_mst_is_enabled(struct net_bridge *br)
1835{
1836 return false;
1837}
1838
1839static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1840 u8 state, struct netlink_ext_ack *extack)
1841{
1842 return -EOPNOTSUPP;
1843}
1844
1845static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1846 struct netlink_ext_ack *extack)
1847{
1848 return -EOPNOTSUPP;
1849}
1850
1851static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1852{
1853 return 0;
1854}
1855
1856static inline int br_mst_fill_info(struct sk_buff *skb,
1857 const struct net_bridge_vlan_group *vg)
1858{
1859 return -EOPNOTSUPP;
1860}
1861
1862static inline int br_mst_process(struct net_bridge_port *p,
1863 const struct nlattr *mst_attr,
1864 struct netlink_ext_ack *extack)
1865{
1866 return -EOPNOTSUPP;
1867}
1868#endif
1869
1870struct nf_br_ops {
1871 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1872};
1873extern const struct nf_br_ops __rcu *nf_br_ops;
1874
1875/* br_netfilter.c */
1876#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1877int br_nf_core_init(void);
1878void br_nf_core_fini(void);
1879void br_netfilter_rtable_init(struct net_bridge *);
1880#else
1881static inline int br_nf_core_init(void) { return 0; }
1882static inline void br_nf_core_fini(void) {}
1883#define br_netfilter_rtable_init(x)
1884#endif
1885
1886/* br_stp.c */
1887void br_set_state(struct net_bridge_port *p, unsigned int state);
1888struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1889void br_init_port(struct net_bridge_port *p);
1890void br_become_designated_port(struct net_bridge_port *p);
1891
1892void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1893int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1894int br_set_hello_time(struct net_bridge *br, unsigned long x);
1895int br_set_max_age(struct net_bridge *br, unsigned long x);
1896int __set_ageing_time(struct net_device *dev, unsigned long t);
1897int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1898
1899
1900/* br_stp_if.c */
1901void br_stp_enable_bridge(struct net_bridge *br);
1902void br_stp_disable_bridge(struct net_bridge *br);
1903int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1904 struct netlink_ext_ack *extack);
1905void br_stp_enable_port(struct net_bridge_port *p);
1906void br_stp_disable_port(struct net_bridge_port *p);
1907bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1908void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1909void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1910int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1911int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1912ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1913
1914/* br_stp_bpdu.c */
1915struct stp_proto;
1916void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1917 struct net_device *dev);
1918
1919/* br_stp_timer.c */
1920void br_stp_timer_init(struct net_bridge *br);
1921void br_stp_port_timer_init(struct net_bridge_port *p);
1922unsigned long br_timer_value(const struct timer_list *timer);
1923
1924/* br.c */
1925#if IS_ENABLED(CONFIG_ATM_LANE)
1926extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1927#endif
1928
1929/* br_mrp.c */
1930#if IS_ENABLED(CONFIG_BRIDGE_MRP)
1931int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1932 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1933bool br_mrp_enabled(struct net_bridge *br);
1934void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1935int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1936#else
1937static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1938 struct nlattr *attr, int cmd,
1939 struct netlink_ext_ack *extack)
1940{
1941 return -EOPNOTSUPP;
1942}
1943
1944static inline bool br_mrp_enabled(struct net_bridge *br)
1945{
1946 return false;
1947}
1948
1949static inline void br_mrp_port_del(struct net_bridge *br,
1950 struct net_bridge_port *p)
1951{
1952}
1953
1954static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1955{
1956 return 0;
1957}
1958
1959#endif
1960
1961/* br_cfm.c */
1962#if IS_ENABLED(CONFIG_BRIDGE_CFM)
1963int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1964 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1965bool br_cfm_created(struct net_bridge *br);
1966void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1967int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1968int br_cfm_status_fill_info(struct sk_buff *skb,
1969 struct net_bridge *br,
1970 bool getlink);
1971int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1972int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1973#else
1974static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1975 struct nlattr *attr, int cmd,
1976 struct netlink_ext_ack *extack)
1977{
1978 return -EOPNOTSUPP;
1979}
1980
1981static inline bool br_cfm_created(struct net_bridge *br)
1982{
1983 return false;
1984}
1985
1986static inline void br_cfm_port_del(struct net_bridge *br,
1987 struct net_bridge_port *p)
1988{
1989}
1990
1991static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1992{
1993 return -EOPNOTSUPP;
1994}
1995
1996static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1997 struct net_bridge *br,
1998 bool getlink)
1999{
2000 return -EOPNOTSUPP;
2001}
2002
2003static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2004{
2005 *count = 0;
2006 return -EOPNOTSUPP;
2007}
2008
2009static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2010{
2011 *count = 0;
2012 return -EOPNOTSUPP;
2013}
2014#endif
2015
2016/* br_netlink.c */
2017extern struct rtnl_link_ops br_link_ops;
2018int br_netlink_init(void);
2019void br_netlink_fini(void);
2020void br_ifinfo_notify(int event, const struct net_bridge *br,
2021 const struct net_bridge_port *port);
2022void br_info_notify(int event, const struct net_bridge *br,
2023 const struct net_bridge_port *port, u32 filter);
2024int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2025 struct netlink_ext_ack *extack);
2026int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2027int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2028 u32 filter_mask, int nlflags);
2029int br_process_vlan_info(struct net_bridge *br,
2030 struct net_bridge_port *p, int cmd,
2031 struct bridge_vlan_info *vinfo_curr,
2032 struct bridge_vlan_info **vinfo_last,
2033 bool *changed,
2034 struct netlink_ext_ack *extack);
2035
2036#ifdef CONFIG_SYSFS
2037/* br_sysfs_if.c */
2038extern const struct sysfs_ops brport_sysfs_ops;
2039int br_sysfs_addif(struct net_bridge_port *p);
2040int br_sysfs_renameif(struct net_bridge_port *p);
2041
2042/* br_sysfs_br.c */
2043int br_sysfs_addbr(struct net_device *dev);
2044void br_sysfs_delbr(struct net_device *dev);
2045
2046#else
2047
2048static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2049static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2050static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2051static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2052#endif /* CONFIG_SYSFS */
2053
2054/* br_switchdev.c */
2055#ifdef CONFIG_NET_SWITCHDEV
2056int br_switchdev_port_offload(struct net_bridge_port *p,
2057 struct net_device *dev, const void *ctx,
2058 struct notifier_block *atomic_nb,
2059 struct notifier_block *blocking_nb,
2060 bool tx_fwd_offload,
2061 struct netlink_ext_ack *extack);
2062
2063void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2064 struct notifier_block *atomic_nb,
2065 struct notifier_block *blocking_nb);
2066
2067bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2068
2069void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2070
2071void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2072 struct sk_buff *skb);
2073void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2074 struct sk_buff *skb);
2075void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2076 struct sk_buff *skb);
2077bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2078 const struct sk_buff *skb);
2079int br_switchdev_set_port_flag(struct net_bridge_port *p,
2080 unsigned long flags,
2081 unsigned long mask,
2082 struct netlink_ext_ack *extack);
2083void br_switchdev_fdb_notify(struct net_bridge *br,
2084 const struct net_bridge_fdb_entry *fdb, int type);
2085void br_switchdev_mdb_notify(struct net_device *dev,
2086 struct net_bridge_mdb_entry *mp,
2087 struct net_bridge_port_group *pg,
2088 int type);
2089int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2090 bool changed, struct netlink_ext_ack *extack);
2091int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2092void br_switchdev_init(struct net_bridge *br);
2093
2094static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2095{
2096 skb->offload_fwd_mark = 0;
2097}
2098#else
2099static inline int
2100br_switchdev_port_offload(struct net_bridge_port *p,
2101 struct net_device *dev, const void *ctx,
2102 struct notifier_block *atomic_nb,
2103 struct notifier_block *blocking_nb,
2104 bool tx_fwd_offload,
2105 struct netlink_ext_ack *extack)
2106{
2107 return -EOPNOTSUPP;
2108}
2109
2110static inline void
2111br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2112 struct notifier_block *atomic_nb,
2113 struct notifier_block *blocking_nb)
2114{
2115}
2116
2117static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2118{
2119 return false;
2120}
2121
2122static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2123{
2124}
2125
2126static inline void
2127nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2128 struct sk_buff *skb)
2129{
2130}
2131
2132static inline void
2133nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2134 struct sk_buff *skb)
2135{
2136}
2137
2138static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2139 struct sk_buff *skb)
2140{
2141}
2142
2143static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2144 const struct sk_buff *skb)
2145{
2146 return true;
2147}
2148
2149static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2150 unsigned long flags,
2151 unsigned long mask,
2152 struct netlink_ext_ack *extack)
2153{
2154 return 0;
2155}
2156
2157static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2158 u16 flags, bool changed,
2159 struct netlink_ext_ack *extack)
2160{
2161 return -EOPNOTSUPP;
2162}
2163
2164static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2165{
2166 return -EOPNOTSUPP;
2167}
2168
2169static inline void
2170br_switchdev_fdb_notify(struct net_bridge *br,
2171 const struct net_bridge_fdb_entry *fdb, int type)
2172{
2173}
2174
2175static inline void br_switchdev_mdb_notify(struct net_device *dev,
2176 struct net_bridge_mdb_entry *mp,
2177 struct net_bridge_port_group *pg,
2178 int type)
2179{
2180}
2181
2182static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2183{
2184}
2185
2186static inline void br_switchdev_init(struct net_bridge *br)
2187{
2188}
2189
2190#endif /* CONFIG_NET_SWITCHDEV */
2191
2192/* br_arp_nd_proxy.c */
2193void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2194void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2195 u16 vid, struct net_bridge_port *p);
2196void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2197 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2198struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2199#endif