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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 <net/pkt_cls.h>
19#include <linux/if_vlan.h>
20#include <linux/rhashtable.h>
21#include <linux/refcount.h>
22
23#define BR_HASH_BITS 8
24#define BR_HASH_SIZE (1 << BR_HASH_BITS)
25
26#define BR_HOLD_TIME (1*HZ)
27
28#define BR_PORT_BITS 10
29#define BR_MAX_PORTS (1<<BR_PORT_BITS)
30
31#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
32#define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
33#define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
34
35#define BR_HWDOM_MAX BITS_PER_LONG
36
37#define BR_VERSION "2.3"
38
39/* Control of forwarding link local multicast */
40#define BR_GROUPFWD_DEFAULT 0
41/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
42enum {
43 BR_GROUPFWD_STP = BIT(0),
44 BR_GROUPFWD_MACPAUSE = BIT(1),
45 BR_GROUPFWD_LACP = BIT(2),
46};
47
48#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
49 BR_GROUPFWD_LACP)
50/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
51#define BR_GROUPFWD_8021AD 0xB801u
52
53/* Path to usermode spanning tree program */
54#define BR_STP_PROG "/sbin/bridge-stp"
55
56#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
57
58typedef struct bridge_id bridge_id;
59typedef struct mac_addr mac_addr;
60typedef __u16 port_id;
61
62struct bridge_id {
63 unsigned char prio[2];
64 unsigned char addr[ETH_ALEN];
65};
66
67struct mac_addr {
68 unsigned char addr[ETH_ALEN];
69};
70
71#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
72/* our own querier */
73struct bridge_mcast_own_query {
74 struct timer_list timer;
75 u32 startup_sent;
76};
77
78/* other querier */
79struct bridge_mcast_other_query {
80 struct timer_list timer;
81 struct timer_list delay_timer;
82};
83
84/* selected querier */
85struct bridge_mcast_querier {
86 struct br_ip addr;
87 int port_ifidx;
88 seqcount_spinlock_t seq;
89};
90
91/* IGMP/MLD statistics */
92struct bridge_mcast_stats {
93 struct br_mcast_stats mstats;
94 struct u64_stats_sync syncp;
95};
96
97struct br_mdb_src_entry {
98 struct br_ip addr;
99};
100
101struct br_mdb_config {
102 struct net_bridge *br;
103 struct net_bridge_port *p;
104 struct br_mdb_entry *entry;
105 struct br_ip group;
106 bool src_entry;
107 u8 filter_mode;
108 u16 nlflags;
109 struct br_mdb_src_entry *src_entries;
110 int num_src_entries;
111 u8 rt_protocol;
112};
113#endif
114
115/* net_bridge_mcast_port must be always defined due to forwarding stubs */
116struct net_bridge_mcast_port {
117#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
118 struct net_bridge_port *port;
119 struct net_bridge_vlan *vlan;
120
121 struct bridge_mcast_own_query ip4_own_query;
122 struct timer_list ip4_mc_router_timer;
123 struct hlist_node ip4_rlist;
124#if IS_ENABLED(CONFIG_IPV6)
125 struct bridge_mcast_own_query ip6_own_query;
126 struct timer_list ip6_mc_router_timer;
127 struct hlist_node ip6_rlist;
128#endif /* IS_ENABLED(CONFIG_IPV6) */
129 unsigned char multicast_router;
130 u32 mdb_n_entries;
131 u32 mdb_max_entries;
132#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
133};
134
135/* net_bridge_mcast must be always defined due to forwarding stubs */
136struct net_bridge_mcast {
137#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
138 struct net_bridge *br;
139 struct net_bridge_vlan *vlan;
140
141 u32 multicast_last_member_count;
142 u32 multicast_startup_query_count;
143
144 u8 multicast_querier;
145 u8 multicast_igmp_version;
146 u8 multicast_router;
147#if IS_ENABLED(CONFIG_IPV6)
148 u8 multicast_mld_version;
149#endif
150 unsigned long multicast_last_member_interval;
151 unsigned long multicast_membership_interval;
152 unsigned long multicast_querier_interval;
153 unsigned long multicast_query_interval;
154 unsigned long multicast_query_response_interval;
155 unsigned long multicast_startup_query_interval;
156 struct hlist_head ip4_mc_router_list;
157 struct timer_list ip4_mc_router_timer;
158 struct bridge_mcast_other_query ip4_other_query;
159 struct bridge_mcast_own_query ip4_own_query;
160 struct bridge_mcast_querier ip4_querier;
161#if IS_ENABLED(CONFIG_IPV6)
162 struct hlist_head ip6_mc_router_list;
163 struct timer_list ip6_mc_router_timer;
164 struct bridge_mcast_other_query ip6_other_query;
165 struct bridge_mcast_own_query ip6_own_query;
166 struct bridge_mcast_querier ip6_querier;
167#endif /* IS_ENABLED(CONFIG_IPV6) */
168#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
169};
170
171struct br_tunnel_info {
172 __be64 tunnel_id;
173 struct metadata_dst __rcu *tunnel_dst;
174};
175
176/* private vlan flags */
177enum {
178 BR_VLFLAG_PER_PORT_STATS = BIT(0),
179 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
180 BR_VLFLAG_MCAST_ENABLED = BIT(2),
181 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
182 BR_VLFLAG_NEIGH_SUPPRESS_ENABLED = BIT(4),
183};
184
185/**
186 * struct net_bridge_vlan - per-vlan entry
187 *
188 * @vnode: rhashtable member
189 * @tnode: rhashtable member
190 * @vid: VLAN id
191 * @flags: bridge vlan flags
192 * @priv_flags: private (in-kernel) bridge vlan flags
193 * @state: STP state (e.g. blocking, learning, forwarding)
194 * @stats: per-cpu VLAN statistics
195 * @br: if MASTER flag set, this points to a bridge struct
196 * @port: if MASTER flag unset, this points to a port struct
197 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
198 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
199 * for this VLAN entry
200 * @tinfo: bridge tunnel info
201 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
202 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
203 * context
204 * @msti: if MASTER flag set, this holds the VLANs MST instance
205 * @vlist: sorted list of VLAN entries
206 * @rcu: used for entry destruction
207 *
208 * This structure is shared between the global per-VLAN entries contained in
209 * the bridge rhashtable and the local per-port per-VLAN entries contained in
210 * the port's rhashtable. The union entries should be interpreted depending on
211 * the entry flags that are set.
212 */
213struct net_bridge_vlan {
214 struct rhash_head vnode;
215 struct rhash_head tnode;
216 u16 vid;
217 u16 flags;
218 u16 priv_flags;
219 u8 state;
220 struct pcpu_sw_netstats __percpu *stats;
221 union {
222 struct net_bridge *br;
223 struct net_bridge_port *port;
224 };
225 union {
226 refcount_t refcnt;
227 struct net_bridge_vlan *brvlan;
228 };
229
230 struct br_tunnel_info tinfo;
231
232 union {
233 struct net_bridge_mcast br_mcast_ctx;
234 struct net_bridge_mcast_port port_mcast_ctx;
235 };
236
237 u16 msti;
238
239 struct list_head vlist;
240
241 struct rcu_head rcu;
242};
243
244/**
245 * struct net_bridge_vlan_group
246 *
247 * @vlan_hash: VLAN entry rhashtable
248 * @vlan_list: sorted VLAN entry list
249 * @num_vlans: number of total VLAN entries
250 * @pvid: PVID VLAN id
251 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
252 *
253 * IMPORTANT: Be careful when checking if there're VLAN entries using list
254 * primitives because the bridge can have entries in its list which
255 * are just for global context but not for filtering, i.e. they have
256 * the master flag set but not the brentry flag. If you have to check
257 * if there're "real" entries in the bridge please test @num_vlans
258 */
259struct net_bridge_vlan_group {
260 struct rhashtable vlan_hash;
261 struct rhashtable tunnel_hash;
262 struct list_head vlan_list;
263 u16 num_vlans;
264 u16 pvid;
265 u8 pvid_state;
266};
267
268/* bridge fdb flags */
269enum {
270 BR_FDB_LOCAL,
271 BR_FDB_STATIC,
272 BR_FDB_STICKY,
273 BR_FDB_ADDED_BY_USER,
274 BR_FDB_ADDED_BY_EXT_LEARN,
275 BR_FDB_OFFLOADED,
276 BR_FDB_NOTIFY,
277 BR_FDB_NOTIFY_INACTIVE,
278 BR_FDB_LOCKED,
279 BR_FDB_DYNAMIC_LEARNED,
280};
281
282struct net_bridge_fdb_key {
283 mac_addr addr;
284 u16 vlan_id;
285};
286
287struct net_bridge_fdb_entry {
288 struct rhash_head rhnode;
289 struct net_bridge_port *dst;
290
291 struct net_bridge_fdb_key key;
292 struct hlist_node fdb_node;
293 unsigned long flags;
294
295 /* write-heavy members should not affect lookups */
296 unsigned long updated ____cacheline_aligned_in_smp;
297 unsigned long used;
298
299 struct rcu_head rcu;
300};
301
302struct net_bridge_fdb_flush_desc {
303 unsigned long flags;
304 unsigned long flags_mask;
305 int port_ifindex;
306 u16 vlan_id;
307};
308
309#define MDB_PG_FLAGS_PERMANENT BIT(0)
310#define MDB_PG_FLAGS_OFFLOAD BIT(1)
311#define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
312#define MDB_PG_FLAGS_STAR_EXCL BIT(3)
313#define MDB_PG_FLAGS_BLOCKED BIT(4)
314
315#define PG_SRC_ENT_LIMIT 32
316
317#define BR_SGRP_F_DELETE BIT(0)
318#define BR_SGRP_F_SEND BIT(1)
319#define BR_SGRP_F_INSTALLED BIT(2)
320#define BR_SGRP_F_USER_ADDED BIT(3)
321
322struct net_bridge_mcast_gc {
323 struct hlist_node gc_node;
324 void (*destroy)(struct net_bridge_mcast_gc *gc);
325};
326
327struct net_bridge_group_src {
328 struct hlist_node node;
329
330 struct br_ip addr;
331 struct net_bridge_port_group *pg;
332 u8 flags;
333 u8 src_query_rexmit_cnt;
334 struct timer_list timer;
335
336 struct net_bridge *br;
337 struct net_bridge_mcast_gc mcast_gc;
338 struct rcu_head rcu;
339};
340
341struct net_bridge_port_group_sg_key {
342 struct net_bridge_port *port;
343 struct br_ip addr;
344};
345
346struct net_bridge_port_group {
347 struct net_bridge_port_group __rcu *next;
348 struct net_bridge_port_group_sg_key key;
349 unsigned char eth_addr[ETH_ALEN] __aligned(2);
350 unsigned char flags;
351 unsigned char filter_mode;
352 unsigned char grp_query_rexmit_cnt;
353 unsigned char rt_protocol;
354
355 struct hlist_head src_list;
356 unsigned int src_ents;
357 struct timer_list timer;
358 struct timer_list rexmit_timer;
359 struct hlist_node mglist;
360 struct rb_root eht_set_tree;
361 struct rb_root eht_host_tree;
362
363 struct rhash_head rhnode;
364 struct net_bridge_mcast_gc mcast_gc;
365 struct rcu_head rcu;
366};
367
368struct net_bridge_mdb_entry {
369 struct rhash_head rhnode;
370 struct net_bridge *br;
371 struct net_bridge_port_group __rcu *ports;
372 struct br_ip addr;
373 bool host_joined;
374
375 struct timer_list timer;
376 struct hlist_node mdb_node;
377
378 struct net_bridge_mcast_gc mcast_gc;
379 struct rcu_head rcu;
380};
381
382struct net_bridge_port {
383 struct net_bridge *br;
384 struct net_device *dev;
385 netdevice_tracker dev_tracker;
386 struct list_head list;
387
388 unsigned long flags;
389#ifdef CONFIG_BRIDGE_VLAN_FILTERING
390 struct net_bridge_vlan_group __rcu *vlgrp;
391#endif
392 struct net_bridge_port __rcu *backup_port;
393 u32 backup_nhid;
394
395 /* STP */
396 u8 priority;
397 u8 state;
398 u16 port_no;
399 unsigned char topology_change_ack;
400 unsigned char config_pending;
401 port_id port_id;
402 port_id designated_port;
403 bridge_id designated_root;
404 bridge_id designated_bridge;
405 u32 path_cost;
406 u32 designated_cost;
407 unsigned long designated_age;
408
409 struct timer_list forward_delay_timer;
410 struct timer_list hold_timer;
411 struct timer_list message_age_timer;
412 struct kobject kobj;
413 struct rcu_head rcu;
414
415 struct net_bridge_mcast_port multicast_ctx;
416
417#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
418 struct bridge_mcast_stats __percpu *mcast_stats;
419
420 u32 multicast_eht_hosts_limit;
421 u32 multicast_eht_hosts_cnt;
422 struct hlist_head mglist;
423#endif
424
425#ifdef CONFIG_SYSFS
426 char sysfs_name[IFNAMSIZ];
427#endif
428
429#ifdef CONFIG_NET_POLL_CONTROLLER
430 struct netpoll *np;
431#endif
432#ifdef CONFIG_NET_SWITCHDEV
433 /* Identifier used to group ports that share the same switchdev
434 * hardware domain.
435 */
436 int hwdom;
437 int offload_count;
438 struct netdev_phys_item_id ppid;
439#endif
440 u16 group_fwd_mask;
441 u16 backup_redirected_cnt;
442
443 struct bridge_stp_xstats stp_xstats;
444};
445
446#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
447
448#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
449#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
450
451static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
452{
453 return rcu_dereference(dev->rx_handler_data);
454}
455
456static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
457{
458 return netif_is_bridge_port(dev) ?
459 rtnl_dereference(dev->rx_handler_data) : NULL;
460}
461
462static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
463{
464 return netif_is_bridge_port(dev) ?
465 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
466}
467
468enum net_bridge_opts {
469 BROPT_VLAN_ENABLED,
470 BROPT_VLAN_STATS_ENABLED,
471 BROPT_NF_CALL_IPTABLES,
472 BROPT_NF_CALL_IP6TABLES,
473 BROPT_NF_CALL_ARPTABLES,
474 BROPT_GROUP_ADDR_SET,
475 BROPT_MULTICAST_ENABLED,
476 BROPT_MULTICAST_QUERY_USE_IFADDR,
477 BROPT_MULTICAST_STATS_ENABLED,
478 BROPT_HAS_IPV6_ADDR,
479 BROPT_NEIGH_SUPPRESS_ENABLED,
480 BROPT_MTU_SET_BY_USER,
481 BROPT_VLAN_STATS_PER_PORT,
482 BROPT_NO_LL_LEARN,
483 BROPT_VLAN_BRIDGE_BINDING,
484 BROPT_MCAST_VLAN_SNOOPING_ENABLED,
485 BROPT_MST_ENABLED,
486};
487
488struct net_bridge {
489 spinlock_t lock;
490 spinlock_t hash_lock;
491 struct hlist_head frame_type_list;
492 struct net_device *dev;
493 unsigned long options;
494 /* These fields are accessed on each packet */
495#ifdef CONFIG_BRIDGE_VLAN_FILTERING
496 __be16 vlan_proto;
497 u16 default_pvid;
498 struct net_bridge_vlan_group __rcu *vlgrp;
499#endif
500
501 struct rhashtable fdb_hash_tbl;
502 struct list_head port_list;
503#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
504 union {
505 struct rtable fake_rtable;
506 struct rt6_info fake_rt6_info;
507 };
508#endif
509 u16 group_fwd_mask;
510 u16 group_fwd_mask_required;
511
512 /* STP */
513 bridge_id designated_root;
514 bridge_id bridge_id;
515 unsigned char topology_change;
516 unsigned char topology_change_detected;
517 u16 root_port;
518 unsigned long max_age;
519 unsigned long hello_time;
520 unsigned long forward_delay;
521 unsigned long ageing_time;
522 unsigned long bridge_max_age;
523 unsigned long bridge_hello_time;
524 unsigned long bridge_forward_delay;
525 unsigned long bridge_ageing_time;
526 u32 root_path_cost;
527
528 u8 group_addr[ETH_ALEN];
529
530 enum {
531 BR_NO_STP, /* no spanning tree */
532 BR_KERNEL_STP, /* old STP in kernel */
533 BR_USER_STP, /* new RSTP in userspace */
534 } stp_enabled;
535
536 struct net_bridge_mcast multicast_ctx;
537
538#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
539 struct bridge_mcast_stats __percpu *mcast_stats;
540
541 u32 hash_max;
542
543 spinlock_t multicast_lock;
544
545 struct rhashtable mdb_hash_tbl;
546 struct rhashtable sg_port_tbl;
547
548 struct hlist_head mcast_gc_list;
549 struct hlist_head mdb_list;
550
551 struct work_struct mcast_gc_work;
552#endif
553
554 struct timer_list hello_timer;
555 struct timer_list tcn_timer;
556 struct timer_list topology_change_timer;
557 struct delayed_work gc_work;
558 struct kobject *ifobj;
559 u32 auto_cnt;
560
561 atomic_t fdb_n_learned;
562 u32 fdb_max_learned;
563
564#ifdef CONFIG_NET_SWITCHDEV
565 /* Counter used to make sure that hardware domains get unique
566 * identifiers in case a bridge spans multiple switchdev instances.
567 */
568 int last_hwdom;
569 /* Bit mask of hardware domain numbers in use */
570 unsigned long busy_hwdoms;
571#endif
572 struct hlist_head fdb_list;
573
574#if IS_ENABLED(CONFIG_BRIDGE_MRP)
575 struct hlist_head mrp_list;
576#endif
577#if IS_ENABLED(CONFIG_BRIDGE_CFM)
578 struct hlist_head mep_list;
579#endif
580};
581
582struct br_input_skb_cb {
583 struct net_device *brdev;
584
585 u16 frag_max_size;
586#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
587 u8 igmp;
588 u8 mrouters_only:1;
589#endif
590 u8 proxyarp_replied:1;
591 u8 src_port_isolated:1;
592 u8 promisc:1;
593#ifdef CONFIG_BRIDGE_VLAN_FILTERING
594 u8 vlan_filtered:1;
595#endif
596#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
597 u8 br_netfilter_broute:1;
598#endif
599
600#ifdef CONFIG_NET_SWITCHDEV
601 /* Set if TX data plane offloading is used towards at least one
602 * hardware domain.
603 */
604 u8 tx_fwd_offload:1;
605 /* The switchdev hardware domain from which this packet was received.
606 * If skb->offload_fwd_mark was set, then this packet was already
607 * forwarded by hardware to the other ports in the source hardware
608 * domain, otherwise it wasn't.
609 */
610 int src_hwdom;
611 /* Bit mask of hardware domains towards this packet has already been
612 * transmitted using the TX data plane offload.
613 */
614 unsigned long fwd_hwdoms;
615#endif
616
617 u32 backup_nhid;
618};
619
620#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
621
622#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
623# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
624#else
625# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
626#endif
627
628#define br_printk(level, br, format, args...) \
629 printk(level "%s: " format, (br)->dev->name, ##args)
630
631#define br_err(__br, format, args...) \
632 br_printk(KERN_ERR, __br, format, ##args)
633#define br_warn(__br, format, args...) \
634 br_printk(KERN_WARNING, __br, format, ##args)
635#define br_notice(__br, format, args...) \
636 br_printk(KERN_NOTICE, __br, format, ##args)
637#define br_info(__br, format, args...) \
638 br_printk(KERN_INFO, __br, format, ##args)
639
640#define br_debug(br, format, args...) \
641 pr_debug("%s: " format, (br)->dev->name, ##args)
642
643/* called under bridge lock */
644static inline int br_is_root_bridge(const struct net_bridge *br)
645{
646 return !memcmp(&br->bridge_id, &br->designated_root, 8);
647}
648
649/* check if a VLAN entry is global */
650static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
651{
652 return v->flags & BRIDGE_VLAN_INFO_MASTER;
653}
654
655/* check if a VLAN entry is used by the bridge */
656static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
657{
658 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
659}
660
661/* check if we should use the vlan entry, returns false if it's only context */
662static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
663{
664 if (br_vlan_is_master(v)) {
665 if (br_vlan_is_brentry(v))
666 return true;
667 else
668 return false;
669 }
670
671 return true;
672}
673
674static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
675{
676 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
677}
678
679static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
680{
681 bool ret = vid > 0 && vid < VLAN_VID_MASK;
682
683 if (!ret)
684 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
685
686 return ret;
687}
688
689static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
690 const struct bridge_vlan_info *last,
691 struct netlink_ext_ack *extack)
692{
693 /* pvid flag is not allowed in ranges */
694 if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
695 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
696 return false;
697 }
698
699 /* when cur is the range end, check if:
700 * - it has range start flag
701 * - range ids are invalid (end is equal to or before start)
702 */
703 if (last) {
704 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
705 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
706 return false;
707 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
708 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
709 return false;
710 } else if (cur->vid <= last->vid) {
711 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
712 return false;
713 }
714 }
715
716 /* check for required range flags */
717 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
718 BRIDGE_VLAN_INFO_RANGE_END))) {
719 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
720 return false;
721 }
722
723 return true;
724}
725
726static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
727{
728 u8 mcast_router = MDB_RTR_TYPE_DISABLED;
729
730#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
731 if (!br_vlan_is_master(v))
732 mcast_router = v->port_mcast_ctx.multicast_router;
733 else
734 mcast_router = v->br_mcast_ctx.multicast_router;
735#endif
736
737 return mcast_router;
738}
739
740static inline int br_afspec_cmd_to_rtm(int cmd)
741{
742 switch (cmd) {
743 case RTM_SETLINK:
744 return RTM_NEWVLAN;
745 case RTM_DELLINK:
746 return RTM_DELVLAN;
747 }
748
749 return 0;
750}
751
752static inline int br_opt_get(const struct net_bridge *br,
753 enum net_bridge_opts opt)
754{
755 return test_bit(opt, &br->options);
756}
757
758int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
759 struct netlink_ext_ack *extack);
760int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
761int br_boolopt_multi_toggle(struct net_bridge *br,
762 struct br_boolopt_multi *bm,
763 struct netlink_ext_ack *extack);
764void br_boolopt_multi_get(const struct net_bridge *br,
765 struct br_boolopt_multi *bm);
766void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
767
768#if IS_ENABLED(CONFIG_NET_TC_SKB_EXT)
769static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
770{
771 struct tc_skb_ext *ext;
772
773 if (!tc_skb_ext_tc_enabled())
774 return;
775
776 ext = skb_ext_find(skb, TC_SKB_EXT);
777 if (ext) {
778 ext->l2_miss = miss;
779 return;
780 }
781 if (!miss)
782 return;
783 ext = tc_skb_ext_alloc(skb);
784 if (!ext)
785 return;
786 ext->l2_miss = true;
787}
788#else
789static inline void br_tc_skb_miss_set(struct sk_buff *skb, bool miss)
790{
791}
792#endif
793
794/* br_device.c */
795void br_dev_setup(struct net_device *dev);
796void br_dev_delete(struct net_device *dev, struct list_head *list);
797netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
798#ifdef CONFIG_NET_POLL_CONTROLLER
799static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
800 struct sk_buff *skb)
801{
802 netpoll_send_skb(p->np, skb);
803}
804
805int br_netpoll_enable(struct net_bridge_port *p);
806void br_netpoll_disable(struct net_bridge_port *p);
807#else
808static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
809 struct sk_buff *skb)
810{
811}
812
813static inline int br_netpoll_enable(struct net_bridge_port *p)
814{
815 return 0;
816}
817
818static inline void br_netpoll_disable(struct net_bridge_port *p)
819{
820}
821#endif
822
823/* br_fdb.c */
824#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
825#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
826#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
827 NTF_STICKY | NTF_OFFLOADED)
828
829int br_fdb_init(void);
830void br_fdb_fini(void);
831int br_fdb_hash_init(struct net_bridge *br);
832void br_fdb_hash_fini(struct net_bridge *br);
833void br_fdb_flush(struct net_bridge *br,
834 const struct net_bridge_fdb_flush_desc *desc);
835void br_fdb_find_delete_local(struct net_bridge *br,
836 const struct net_bridge_port *p,
837 const unsigned char *addr, u16 vid);
838void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
839void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
840void br_fdb_cleanup(struct work_struct *work);
841void br_fdb_delete_by_port(struct net_bridge *br,
842 const struct net_bridge_port *p, u16 vid, int do_all);
843struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
844 const unsigned char *addr,
845 __u16 vid);
846int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
847int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
848 unsigned long off);
849int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
850 const unsigned char *addr, u16 vid);
851void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
852 const unsigned char *addr, u16 vid, unsigned long flags);
853
854int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
855 struct net_device *dev, const unsigned char *addr, u16 vid,
856 bool *notified, struct netlink_ext_ack *extack);
857int br_fdb_delete_bulk(struct nlmsghdr *nlh, struct net_device *dev,
858 struct netlink_ext_ack *extack);
859int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
860 const unsigned char *addr, u16 vid, u16 nlh_flags,
861 bool *notified, struct netlink_ext_ack *extack);
862int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
863 struct net_device *dev, struct net_device *fdev, int *idx);
864int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
865 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
866 struct netlink_ext_ack *extack);
867int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
868void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
869int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
870 const unsigned char *addr, u16 vid,
871 bool locked, bool swdev_notify);
872int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
873 const unsigned char *addr, u16 vid,
874 bool swdev_notify);
875void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
876 const unsigned char *addr, u16 vid, bool offloaded);
877
878/* br_forward.c */
879enum br_pkt_type {
880 BR_PKT_UNICAST,
881 BR_PKT_MULTICAST,
882 BR_PKT_BROADCAST
883};
884int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
885void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
886 bool local_rcv, bool local_orig);
887int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
888void br_flood(struct net_bridge *br, struct sk_buff *skb,
889 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig,
890 u16 vid);
891
892/* return true if both source port and dest port are isolated */
893static inline bool br_skb_isolated(const struct net_bridge_port *to,
894 const struct sk_buff *skb)
895{
896 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
897 (to->flags & BR_ISOLATED);
898}
899
900/* br_if.c */
901void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
902int br_add_bridge(struct net *net, const char *name);
903int br_del_bridge(struct net *net, const char *name);
904int br_add_if(struct net_bridge *br, struct net_device *dev,
905 struct netlink_ext_ack *extack);
906int br_del_if(struct net_bridge *br, struct net_device *dev);
907void br_mtu_auto_adjust(struct net_bridge *br);
908netdev_features_t br_features_recompute(struct net_bridge *br,
909 netdev_features_t features);
910void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
911void br_manage_promisc(struct net_bridge *br);
912int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
913
914/* br_input.c */
915int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
916rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
917
918struct br_frame_type {
919 __be16 type;
920 int (*frame_handler)(struct net_bridge_port *port,
921 struct sk_buff *skb);
922 struct hlist_node list;
923};
924
925void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
926void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
927
928static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
929{
930 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
931}
932
933static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
934{
935 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
936}
937
938static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
939{
940 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
941}
942
943static inline struct net_bridge_port *
944br_port_get_check_rtnl(const struct net_device *dev)
945{
946 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
947}
948
949/* br_ioctl.c */
950int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
951 void __user *data, int cmd);
952int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
953 struct ifreq *ifr, void __user *uarg);
954
955/* br_multicast.c */
956#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
957int br_multicast_rcv(struct net_bridge_mcast **brmctx,
958 struct net_bridge_mcast_port **pmctx,
959 struct net_bridge_vlan *vlan,
960 struct sk_buff *skb, u16 vid);
961struct net_bridge_mdb_entry *
962br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
963 u16 vid);
964int br_multicast_add_port(struct net_bridge_port *port);
965void br_multicast_del_port(struct net_bridge_port *port);
966void br_multicast_enable_port(struct net_bridge_port *port);
967void br_multicast_disable_port(struct net_bridge_port *port);
968void br_multicast_init(struct net_bridge *br);
969void br_multicast_join_snoopers(struct net_bridge *br);
970void br_multicast_leave_snoopers(struct net_bridge *br);
971void br_multicast_open(struct net_bridge *br);
972void br_multicast_stop(struct net_bridge *br);
973void br_multicast_dev_del(struct net_bridge *br);
974void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
975 struct net_bridge_mcast *brmctx,
976 bool local_rcv, bool local_orig);
977int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
978int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
979 unsigned long val);
980int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
981int br_multicast_toggle(struct net_bridge *br, unsigned long val,
982 struct netlink_ext_ack *extack);
983int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
984int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
985 unsigned long val);
986#if IS_ENABLED(CONFIG_IPV6)
987int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
988 unsigned long val);
989#endif
990struct net_bridge_mdb_entry *
991br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
992struct net_bridge_mdb_entry *
993br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
994struct net_bridge_port_group *
995br_multicast_new_port_group(struct net_bridge_port *port,
996 const struct br_ip *group,
997 struct net_bridge_port_group __rcu *next,
998 unsigned char flags, const unsigned char *src,
999 u8 filter_mode, u8 rt_protocol,
1000 struct netlink_ext_ack *extack);
1001void br_multicast_del_port_group(struct net_bridge_port_group *p);
1002int br_mdb_hash_init(struct net_bridge *br);
1003void br_mdb_hash_fini(struct net_bridge *br);
1004void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
1005 struct net_bridge_port_group *pg, int type);
1006void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
1007 int type);
1008void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
1009 struct net_bridge_port_group *pg,
1010 struct net_bridge_port_group __rcu **pp);
1011void br_multicast_count(struct net_bridge *br,
1012 const struct net_bridge_port *p,
1013 const struct sk_buff *skb, u8 type, u8 dir);
1014int br_multicast_init_stats(struct net_bridge *br);
1015void br_multicast_uninit_stats(struct net_bridge *br);
1016void br_multicast_get_stats(const struct net_bridge *br,
1017 const struct net_bridge_port *p,
1018 struct br_mcast_stats *dest);
1019u32 br_multicast_ngroups_get(const struct net_bridge_mcast_port *pmctx);
1020void br_multicast_ngroups_set_max(struct net_bridge_mcast_port *pmctx, u32 max);
1021u32 br_multicast_ngroups_get_max(const struct net_bridge_mcast_port *pmctx);
1022int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
1023 struct netlink_ext_ack *extack);
1024int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1025 struct netlink_ext_ack *extack);
1026int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1027 struct netlink_ext_ack *extack);
1028int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1029 struct netlink_callback *cb);
1030int br_mdb_get(struct net_device *dev, struct nlattr *tb[], u32 portid, u32 seq,
1031 struct netlink_ext_ack *extack);
1032void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
1033 struct net_bridge_mdb_entry *mp, bool notify);
1034void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
1035void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
1036 u8 filter_mode);
1037void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
1038 struct net_bridge_port_group *sg);
1039struct net_bridge_group_src *
1040br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
1041struct net_bridge_group_src *
1042br_multicast_new_group_src(struct net_bridge_port_group *pg,
1043 struct br_ip *src_ip);
1044void __br_multicast_del_group_src(struct net_bridge_group_src *src);
1045void br_multicast_del_group_src(struct net_bridge_group_src *src,
1046 bool fastleave);
1047void br_multicast_ctx_init(struct net_bridge *br,
1048 struct net_bridge_vlan *vlan,
1049 struct net_bridge_mcast *brmctx);
1050void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
1051void br_multicast_port_ctx_init(struct net_bridge_port *port,
1052 struct net_bridge_vlan *vlan,
1053 struct net_bridge_mcast_port *pmctx);
1054void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1055void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1056int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1057 struct netlink_ext_ack *extack);
1058bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1059
1060int br_rports_fill_info(struct sk_buff *skb,
1061 const struct net_bridge_mcast *brmctx);
1062int br_multicast_dump_querier_state(struct sk_buff *skb,
1063 const struct net_bridge_mcast *brmctx,
1064 int nest_attr);
1065size_t br_multicast_querier_state_size(void);
1066size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1067void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1068 unsigned long val);
1069void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1070 unsigned long val);
1071
1072static inline bool br_group_is_l2(const struct br_ip *group)
1073{
1074 return group->proto == 0;
1075}
1076
1077#define mlock_dereference(X, br) \
1078 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1079
1080static inline struct hlist_node *
1081br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1082 struct sk_buff *skb)
1083{
1084#if IS_ENABLED(CONFIG_IPV6)
1085 if (skb->protocol == htons(ETH_P_IPV6))
1086 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1087#endif
1088 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1089}
1090
1091static inline struct net_bridge_port *
1092br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1093{
1094 struct net_bridge_mcast_port *mctx;
1095
1096#if IS_ENABLED(CONFIG_IPV6)
1097 if (skb->protocol == htons(ETH_P_IPV6))
1098 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1099 ip6_rlist);
1100 else
1101#endif
1102 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1103 ip4_rlist);
1104
1105 if (mctx)
1106 return mctx->port;
1107 else
1108 return NULL;
1109}
1110
1111static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1112{
1113 return timer_pending(&brmctx->ip4_mc_router_timer);
1114}
1115
1116static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1117{
1118#if IS_ENABLED(CONFIG_IPV6)
1119 return timer_pending(&brmctx->ip6_mc_router_timer);
1120#else
1121 return false;
1122#endif
1123}
1124
1125static inline bool
1126br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1127{
1128 switch (brmctx->multicast_router) {
1129 case MDB_RTR_TYPE_PERM:
1130 return true;
1131 case MDB_RTR_TYPE_TEMP_QUERY:
1132 if (skb) {
1133 if (skb->protocol == htons(ETH_P_IP))
1134 return br_ip4_multicast_is_router(brmctx);
1135 else if (skb->protocol == htons(ETH_P_IPV6))
1136 return br_ip6_multicast_is_router(brmctx);
1137 } else {
1138 return br_ip4_multicast_is_router(brmctx) ||
1139 br_ip6_multicast_is_router(brmctx);
1140 }
1141 fallthrough;
1142 default:
1143 return false;
1144 }
1145}
1146
1147static inline bool
1148__br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1149 struct bridge_mcast_other_query *querier,
1150 const bool is_ipv6)
1151{
1152 bool own_querier_enabled;
1153
1154 if (brmctx->multicast_querier) {
1155 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1156 own_querier_enabled = false;
1157 else
1158 own_querier_enabled = true;
1159 } else {
1160 own_querier_enabled = false;
1161 }
1162
1163 return !timer_pending(&querier->delay_timer) &&
1164 (own_querier_enabled || timer_pending(&querier->timer));
1165}
1166
1167static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1168 struct ethhdr *eth,
1169 const struct net_bridge_mdb_entry *mdb)
1170{
1171 switch (eth->h_proto) {
1172 case (htons(ETH_P_IP)):
1173 return __br_multicast_querier_exists(brmctx,
1174 &brmctx->ip4_other_query, false);
1175#if IS_ENABLED(CONFIG_IPV6)
1176 case (htons(ETH_P_IPV6)):
1177 return __br_multicast_querier_exists(brmctx,
1178 &brmctx->ip6_other_query, true);
1179#endif
1180 default:
1181 return !!mdb && br_group_is_l2(&mdb->addr);
1182 }
1183}
1184
1185static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1186{
1187 switch (ip->proto) {
1188 case htons(ETH_P_IP):
1189 return ipv4_is_zeronet(ip->src.ip4);
1190#if IS_ENABLED(CONFIG_IPV6)
1191 case htons(ETH_P_IPV6):
1192 return ipv6_addr_any(&ip->src.ip6);
1193#endif
1194 default:
1195 return false;
1196 }
1197}
1198
1199static inline bool
1200br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1201 __be16 proto)
1202{
1203 switch (proto) {
1204 case htons(ETH_P_IP):
1205 return !!(brmctx->multicast_igmp_version == 3);
1206#if IS_ENABLED(CONFIG_IPV6)
1207 case htons(ETH_P_IPV6):
1208 return !!(brmctx->multicast_mld_version == 2);
1209#endif
1210 default:
1211 return false;
1212 }
1213}
1214
1215static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1216{
1217 return BR_INPUT_SKB_CB(skb)->igmp;
1218}
1219
1220static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1221{
1222 return brmctx->multicast_last_member_interval *
1223 brmctx->multicast_last_member_count;
1224}
1225
1226static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1227{
1228 return brmctx->multicast_membership_interval;
1229}
1230
1231static inline bool
1232br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1233{
1234 return !!brmctx->vlan;
1235}
1236
1237static inline bool
1238br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1239{
1240 return !!pmctx->vlan;
1241}
1242
1243static inline struct net_bridge_mcast *
1244br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1245{
1246 if (!br_multicast_port_ctx_is_vlan(pmctx))
1247 return &pmctx->port->br->multicast_ctx;
1248 else
1249 return &pmctx->vlan->brvlan->br_mcast_ctx;
1250}
1251
1252static inline bool
1253br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1254{
1255 return br_multicast_ctx_is_vlan(brmctx) &&
1256 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1257 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1258}
1259
1260static inline bool
1261br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1262{
1263 return br_multicast_ctx_is_vlan(brmctx) &&
1264 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1265}
1266
1267static inline bool
1268br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1269{
1270 return br_multicast_port_ctx_is_vlan(pmctx) &&
1271 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1272}
1273
1274static inline bool
1275br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1276{
1277 return pmctx->port->state == BR_STATE_DISABLED ||
1278 (br_multicast_port_ctx_is_vlan(pmctx) &&
1279 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1280 pmctx->vlan->state == BR_STATE_DISABLED));
1281}
1282
1283static inline bool
1284br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1285{
1286 return br_multicast_port_ctx_state_disabled(pmctx) ||
1287 pmctx->port->state == BR_STATE_BLOCKING ||
1288 (br_multicast_port_ctx_is_vlan(pmctx) &&
1289 pmctx->vlan->state == BR_STATE_BLOCKING);
1290}
1291
1292static inline bool
1293br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1294{
1295#if IS_ENABLED(CONFIG_IPV6)
1296 return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1297 !hlist_empty(&brmctx->ip6_mc_router_list);
1298#else
1299 return !hlist_empty(&brmctx->ip4_mc_router_list);
1300#endif
1301}
1302
1303static inline bool
1304br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1305 const struct net_bridge_mcast *brmctx2)
1306{
1307 return brmctx1->multicast_igmp_version ==
1308 brmctx2->multicast_igmp_version &&
1309 brmctx1->multicast_last_member_count ==
1310 brmctx2->multicast_last_member_count &&
1311 brmctx1->multicast_startup_query_count ==
1312 brmctx2->multicast_startup_query_count &&
1313 brmctx1->multicast_last_member_interval ==
1314 brmctx2->multicast_last_member_interval &&
1315 brmctx1->multicast_membership_interval ==
1316 brmctx2->multicast_membership_interval &&
1317 brmctx1->multicast_querier_interval ==
1318 brmctx2->multicast_querier_interval &&
1319 brmctx1->multicast_query_interval ==
1320 brmctx2->multicast_query_interval &&
1321 brmctx1->multicast_query_response_interval ==
1322 brmctx2->multicast_query_response_interval &&
1323 brmctx1->multicast_startup_query_interval ==
1324 brmctx2->multicast_startup_query_interval &&
1325 brmctx1->multicast_querier == brmctx2->multicast_querier &&
1326 brmctx1->multicast_router == brmctx2->multicast_router &&
1327 !br_rports_have_mc_router(brmctx1) &&
1328 !br_rports_have_mc_router(brmctx2) &&
1329#if IS_ENABLED(CONFIG_IPV6)
1330 brmctx1->multicast_mld_version ==
1331 brmctx2->multicast_mld_version &&
1332#endif
1333 true;
1334}
1335
1336static inline bool
1337br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1338{
1339 bool vlan_snooping_enabled;
1340
1341 vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1342 BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1343
1344 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1345}
1346#else
1347static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1348 struct net_bridge_mcast_port **pmctx,
1349 struct net_bridge_vlan *vlan,
1350 struct sk_buff *skb,
1351 u16 vid)
1352{
1353 return 0;
1354}
1355
1356static inline struct net_bridge_mdb_entry *
1357br_mdb_entry_skb_get(struct net_bridge_mcast *brmctx, struct sk_buff *skb,
1358 u16 vid)
1359{
1360 return NULL;
1361}
1362
1363static inline int br_multicast_add_port(struct net_bridge_port *port)
1364{
1365 return 0;
1366}
1367
1368static inline void br_multicast_del_port(struct net_bridge_port *port)
1369{
1370}
1371
1372static inline void br_multicast_enable_port(struct net_bridge_port *port)
1373{
1374}
1375
1376static inline void br_multicast_disable_port(struct net_bridge_port *port)
1377{
1378}
1379
1380static inline void br_multicast_init(struct net_bridge *br)
1381{
1382}
1383
1384static inline void br_multicast_join_snoopers(struct net_bridge *br)
1385{
1386}
1387
1388static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1389{
1390}
1391
1392static inline void br_multicast_open(struct net_bridge *br)
1393{
1394}
1395
1396static inline void br_multicast_stop(struct net_bridge *br)
1397{
1398}
1399
1400static inline void br_multicast_dev_del(struct net_bridge *br)
1401{
1402}
1403
1404static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1405 struct sk_buff *skb,
1406 struct net_bridge_mcast *brmctx,
1407 bool local_rcv, bool local_orig)
1408{
1409}
1410
1411static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1412 struct sk_buff *skb)
1413{
1414 return false;
1415}
1416
1417static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1418 struct ethhdr *eth,
1419 const struct net_bridge_mdb_entry *mdb)
1420{
1421 return false;
1422}
1423
1424static inline int br_mdb_add(struct net_device *dev, struct nlattr *tb[],
1425 u16 nlmsg_flags, struct netlink_ext_ack *extack)
1426{
1427 return -EOPNOTSUPP;
1428}
1429
1430static inline int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
1431 struct netlink_ext_ack *extack)
1432{
1433 return -EOPNOTSUPP;
1434}
1435
1436static inline int br_mdb_del_bulk(struct net_device *dev, struct nlattr *tb[],
1437 struct netlink_ext_ack *extack)
1438{
1439 return -EOPNOTSUPP;
1440}
1441
1442static inline int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
1443 struct netlink_callback *cb)
1444{
1445 return 0;
1446}
1447
1448static inline int br_mdb_get(struct net_device *dev, struct nlattr *tb[],
1449 u32 portid, u32 seq,
1450 struct netlink_ext_ack *extack)
1451{
1452 return -EOPNOTSUPP;
1453}
1454
1455static inline int br_mdb_hash_init(struct net_bridge *br)
1456{
1457 return 0;
1458}
1459
1460static inline void br_mdb_hash_fini(struct net_bridge *br)
1461{
1462}
1463
1464static inline void br_multicast_count(struct net_bridge *br,
1465 const struct net_bridge_port *p,
1466 const struct sk_buff *skb,
1467 u8 type, u8 dir)
1468{
1469}
1470
1471static inline int br_multicast_init_stats(struct net_bridge *br)
1472{
1473 return 0;
1474}
1475
1476static inline void br_multicast_uninit_stats(struct net_bridge *br)
1477{
1478}
1479
1480static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1481{
1482 return 0;
1483}
1484
1485static inline void br_multicast_ctx_init(struct net_bridge *br,
1486 struct net_bridge_vlan *vlan,
1487 struct net_bridge_mcast *brmctx)
1488{
1489}
1490
1491static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1492{
1493}
1494
1495static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1496 struct net_bridge_vlan *vlan,
1497 struct net_bridge_mcast_port *pmctx)
1498{
1499}
1500
1501static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1502{
1503}
1504
1505static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1506 bool on)
1507{
1508}
1509
1510static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1511 bool on,
1512 struct netlink_ext_ack *extack)
1513{
1514 return -EOPNOTSUPP;
1515}
1516
1517static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1518 bool on)
1519{
1520 return false;
1521}
1522
1523static inline bool
1524br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1525 const struct net_bridge_mcast *brmctx2)
1526{
1527 return true;
1528}
1529#endif
1530
1531/* br_vlan.c */
1532#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1533bool br_allowed_ingress(const struct net_bridge *br,
1534 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1535 u16 *vid, u8 *state,
1536 struct net_bridge_vlan **vlan);
1537bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1538 const struct sk_buff *skb);
1539bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1540struct sk_buff *br_handle_vlan(struct net_bridge *br,
1541 const struct net_bridge_port *port,
1542 struct net_bridge_vlan_group *vg,
1543 struct sk_buff *skb);
1544int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1545 bool *changed, struct netlink_ext_ack *extack);
1546int br_vlan_delete(struct net_bridge *br, u16 vid);
1547void br_vlan_flush(struct net_bridge *br);
1548struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1549void br_recalculate_fwd_mask(struct net_bridge *br);
1550int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1551 struct netlink_ext_ack *extack);
1552int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1553 struct netlink_ext_ack *extack);
1554int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1555 struct netlink_ext_ack *extack);
1556int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1557int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1558int br_vlan_init(struct net_bridge *br);
1559int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1560 struct netlink_ext_ack *extack);
1561int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1562 struct netlink_ext_ack *extack);
1563int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1564 bool *changed, struct netlink_ext_ack *extack);
1565int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1566void nbp_vlan_flush(struct net_bridge_port *port);
1567int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1568int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1569void br_vlan_get_stats(const struct net_bridge_vlan *v,
1570 struct pcpu_sw_netstats *stats);
1571void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1572int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1573 void *ptr);
1574int br_vlan_rtnl_init(void);
1575void br_vlan_rtnl_uninit(void);
1576void br_vlan_notify(const struct net_bridge *br,
1577 const struct net_bridge_port *p,
1578 u16 vid, u16 vid_range,
1579 int cmd);
1580bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1581 const struct net_bridge_vlan *range_end);
1582
1583void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1584 struct net_device_path_ctx *ctx,
1585 struct net_device_path *path);
1586int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1587 struct net_bridge_port *dst,
1588 struct net_device_path *path);
1589
1590static inline struct net_bridge_vlan_group *br_vlan_group(
1591 const struct net_bridge *br)
1592{
1593 return rtnl_dereference(br->vlgrp);
1594}
1595
1596static inline struct net_bridge_vlan_group *nbp_vlan_group(
1597 const struct net_bridge_port *p)
1598{
1599 return rtnl_dereference(p->vlgrp);
1600}
1601
1602static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1603 const struct net_bridge *br)
1604{
1605 return rcu_dereference(br->vlgrp);
1606}
1607
1608static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1609 const struct net_bridge_port *p)
1610{
1611 return rcu_dereference(p->vlgrp);
1612}
1613
1614/* Since bridge now depends on 8021Q module, but the time bridge sees the
1615 * skb, the vlan tag will always be present if the frame was tagged.
1616 */
1617static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1618{
1619 int err = 0;
1620
1621 if (skb_vlan_tag_present(skb)) {
1622 *vid = skb_vlan_tag_get_id(skb);
1623 } else {
1624 *vid = 0;
1625 err = -EINVAL;
1626 }
1627
1628 return err;
1629}
1630
1631static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1632{
1633 if (!vg)
1634 return 0;
1635
1636 smp_rmb();
1637 return vg->pvid;
1638}
1639
1640static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1641{
1642 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1643}
1644#else
1645static inline bool br_allowed_ingress(const struct net_bridge *br,
1646 struct net_bridge_vlan_group *vg,
1647 struct sk_buff *skb,
1648 u16 *vid, u8 *state,
1649 struct net_bridge_vlan **vlan)
1650
1651{
1652 *vlan = NULL;
1653 return true;
1654}
1655
1656static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1657 const struct sk_buff *skb)
1658{
1659 return true;
1660}
1661
1662static inline bool br_should_learn(struct net_bridge_port *p,
1663 struct sk_buff *skb, u16 *vid)
1664{
1665 return true;
1666}
1667
1668static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1669 const struct net_bridge_port *port,
1670 struct net_bridge_vlan_group *vg,
1671 struct sk_buff *skb)
1672{
1673 return skb;
1674}
1675
1676static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1677 bool *changed, struct netlink_ext_ack *extack)
1678{
1679 *changed = false;
1680 return -EOPNOTSUPP;
1681}
1682
1683static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1684{
1685 return -EOPNOTSUPP;
1686}
1687
1688static inline void br_vlan_flush(struct net_bridge *br)
1689{
1690}
1691
1692static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1693{
1694}
1695
1696static inline int br_vlan_init(struct net_bridge *br)
1697{
1698 return 0;
1699}
1700
1701static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1702 bool *changed, struct netlink_ext_ack *extack)
1703{
1704 *changed = false;
1705 return -EOPNOTSUPP;
1706}
1707
1708static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1709{
1710 return -EOPNOTSUPP;
1711}
1712
1713static inline void nbp_vlan_flush(struct net_bridge_port *port)
1714{
1715}
1716
1717static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1718 u16 vid)
1719{
1720 return NULL;
1721}
1722
1723static inline int nbp_vlan_init(struct net_bridge_port *port,
1724 struct netlink_ext_ack *extack)
1725{
1726 return 0;
1727}
1728
1729static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1730{
1731 return 0;
1732}
1733
1734static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1735{
1736 return 0;
1737}
1738
1739static inline int br_vlan_filter_toggle(struct net_bridge *br,
1740 unsigned long val,
1741 struct netlink_ext_ack *extack)
1742{
1743 return -EOPNOTSUPP;
1744}
1745
1746static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1747 u32 filter_mask)
1748{
1749 return 0;
1750}
1751
1752static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1753 struct net_device_path_ctx *ctx,
1754 struct net_device_path *path)
1755{
1756}
1757
1758static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1759 struct net_bridge_port *dst,
1760 struct net_device_path *path)
1761{
1762 return 0;
1763}
1764
1765static inline struct net_bridge_vlan_group *br_vlan_group(
1766 const struct net_bridge *br)
1767{
1768 return NULL;
1769}
1770
1771static inline struct net_bridge_vlan_group *nbp_vlan_group(
1772 const struct net_bridge_port *p)
1773{
1774 return NULL;
1775}
1776
1777static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1778 const struct net_bridge *br)
1779{
1780 return NULL;
1781}
1782
1783static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1784 const struct net_bridge_port *p)
1785{
1786 return NULL;
1787}
1788
1789static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1790 struct pcpu_sw_netstats *stats)
1791{
1792}
1793
1794static inline void br_vlan_port_event(struct net_bridge_port *p,
1795 unsigned long event)
1796{
1797}
1798
1799static inline int br_vlan_bridge_event(struct net_device *dev,
1800 unsigned long event, void *ptr)
1801{
1802 return 0;
1803}
1804
1805static inline int br_vlan_rtnl_init(void)
1806{
1807 return 0;
1808}
1809
1810static inline void br_vlan_rtnl_uninit(void)
1811{
1812}
1813
1814static inline void br_vlan_notify(const struct net_bridge *br,
1815 const struct net_bridge_port *p,
1816 u16 vid, u16 vid_range,
1817 int cmd)
1818{
1819}
1820
1821static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1822 const struct net_bridge_vlan *range_end)
1823{
1824 return true;
1825}
1826
1827static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1828{
1829 return 0;
1830}
1831
1832#endif
1833
1834/* br_vlan_options.c */
1835#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1836bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1837 const struct net_bridge_vlan *range_end);
1838bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v,
1839 const struct net_bridge_port *p);
1840size_t br_vlan_opts_nl_size(void);
1841int br_vlan_process_options(const struct net_bridge *br,
1842 const struct net_bridge_port *p,
1843 struct net_bridge_vlan *range_start,
1844 struct net_bridge_vlan *range_end,
1845 struct nlattr **tb,
1846 struct netlink_ext_ack *extack);
1847int br_vlan_rtm_process_global_options(struct net_device *dev,
1848 const struct nlattr *attr,
1849 int cmd,
1850 struct netlink_ext_ack *extack);
1851bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1852 const struct net_bridge_vlan *r_end);
1853bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1854 const struct net_bridge_vlan *v_opts);
1855
1856/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1857static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1858{
1859 return READ_ONCE(v->state);
1860}
1861
1862static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1863{
1864 WRITE_ONCE(v->state, state);
1865}
1866
1867static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1868{
1869 return READ_ONCE(vg->pvid_state);
1870}
1871
1872static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1873 u8 state)
1874{
1875 WRITE_ONCE(vg->pvid_state, state);
1876}
1877
1878/* learn_allow is true at ingress and false at egress */
1879static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1880{
1881 switch (state) {
1882 case BR_STATE_LEARNING:
1883 return learn_allow;
1884 case BR_STATE_FORWARDING:
1885 return true;
1886 default:
1887 return false;
1888 }
1889}
1890#endif
1891
1892/* br_mst.c */
1893#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1894DECLARE_STATIC_KEY_FALSE(br_mst_used);
1895static inline bool br_mst_is_enabled(struct net_bridge *br)
1896{
1897 return static_branch_unlikely(&br_mst_used) &&
1898 br_opt_get(br, BROPT_MST_ENABLED);
1899}
1900
1901int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1902 struct netlink_ext_ack *extack);
1903int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1904void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1905int br_mst_set_enabled(struct net_bridge *br, bool on,
1906 struct netlink_ext_ack *extack);
1907size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1908int br_mst_fill_info(struct sk_buff *skb,
1909 const struct net_bridge_vlan_group *vg);
1910int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1911 struct netlink_ext_ack *extack);
1912#else
1913static inline bool br_mst_is_enabled(struct net_bridge *br)
1914{
1915 return false;
1916}
1917
1918static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1919 u8 state, struct netlink_ext_ack *extack)
1920{
1921 return -EOPNOTSUPP;
1922}
1923
1924static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1925 struct netlink_ext_ack *extack)
1926{
1927 return -EOPNOTSUPP;
1928}
1929
1930static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1931{
1932 return 0;
1933}
1934
1935static inline int br_mst_fill_info(struct sk_buff *skb,
1936 const struct net_bridge_vlan_group *vg)
1937{
1938 return -EOPNOTSUPP;
1939}
1940
1941static inline int br_mst_process(struct net_bridge_port *p,
1942 const struct nlattr *mst_attr,
1943 struct netlink_ext_ack *extack)
1944{
1945 return -EOPNOTSUPP;
1946}
1947#endif
1948
1949struct nf_br_ops {
1950 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1951};
1952extern const struct nf_br_ops __rcu *nf_br_ops;
1953
1954/* br_netfilter.c */
1955#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1956int br_nf_core_init(void);
1957void br_nf_core_fini(void);
1958void br_netfilter_rtable_init(struct net_bridge *);
1959#else
1960static inline int br_nf_core_init(void) { return 0; }
1961static inline void br_nf_core_fini(void) {}
1962#define br_netfilter_rtable_init(x)
1963#endif
1964
1965/* br_stp.c */
1966void br_set_state(struct net_bridge_port *p, unsigned int state);
1967struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1968void br_init_port(struct net_bridge_port *p);
1969void br_become_designated_port(struct net_bridge_port *p);
1970
1971void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1972int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1973int br_set_hello_time(struct net_bridge *br, unsigned long x);
1974int br_set_max_age(struct net_bridge *br, unsigned long x);
1975int __set_ageing_time(struct net_device *dev, unsigned long t);
1976int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1977
1978
1979/* br_stp_if.c */
1980void br_stp_enable_bridge(struct net_bridge *br);
1981void br_stp_disable_bridge(struct net_bridge *br);
1982int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1983 struct netlink_ext_ack *extack);
1984void br_stp_enable_port(struct net_bridge_port *p);
1985void br_stp_disable_port(struct net_bridge_port *p);
1986bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1987void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1988void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1989int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1990int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1991ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1992
1993/* br_stp_bpdu.c */
1994struct stp_proto;
1995void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1996 struct net_device *dev);
1997
1998/* br_stp_timer.c */
1999void br_stp_timer_init(struct net_bridge *br);
2000void br_stp_port_timer_init(struct net_bridge_port *p);
2001unsigned long br_timer_value(const struct timer_list *timer);
2002
2003/* br.c */
2004#if IS_ENABLED(CONFIG_ATM_LANE)
2005extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
2006#endif
2007
2008/* br_mrp.c */
2009#if IS_ENABLED(CONFIG_BRIDGE_MRP)
2010int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2011 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2012bool br_mrp_enabled(struct net_bridge *br);
2013void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
2014int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
2015#else
2016static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
2017 struct nlattr *attr, int cmd,
2018 struct netlink_ext_ack *extack)
2019{
2020 return -EOPNOTSUPP;
2021}
2022
2023static inline bool br_mrp_enabled(struct net_bridge *br)
2024{
2025 return false;
2026}
2027
2028static inline void br_mrp_port_del(struct net_bridge *br,
2029 struct net_bridge_port *p)
2030{
2031}
2032
2033static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
2034{
2035 return 0;
2036}
2037
2038#endif
2039
2040/* br_cfm.c */
2041#if IS_ENABLED(CONFIG_BRIDGE_CFM)
2042int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2043 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
2044bool br_cfm_created(struct net_bridge *br);
2045void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
2046int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
2047int br_cfm_status_fill_info(struct sk_buff *skb,
2048 struct net_bridge *br,
2049 bool getlink);
2050int br_cfm_mep_count(struct net_bridge *br, u32 *count);
2051int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
2052#else
2053static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
2054 struct nlattr *attr, int cmd,
2055 struct netlink_ext_ack *extack)
2056{
2057 return -EOPNOTSUPP;
2058}
2059
2060static inline bool br_cfm_created(struct net_bridge *br)
2061{
2062 return false;
2063}
2064
2065static inline void br_cfm_port_del(struct net_bridge *br,
2066 struct net_bridge_port *p)
2067{
2068}
2069
2070static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
2071{
2072 return -EOPNOTSUPP;
2073}
2074
2075static inline int br_cfm_status_fill_info(struct sk_buff *skb,
2076 struct net_bridge *br,
2077 bool getlink)
2078{
2079 return -EOPNOTSUPP;
2080}
2081
2082static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2083{
2084 *count = 0;
2085 return -EOPNOTSUPP;
2086}
2087
2088static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2089{
2090 *count = 0;
2091 return -EOPNOTSUPP;
2092}
2093#endif
2094
2095/* br_netlink.c */
2096extern struct rtnl_link_ops br_link_ops;
2097int br_netlink_init(void);
2098void br_netlink_fini(void);
2099void br_ifinfo_notify(int event, const struct net_bridge *br,
2100 const struct net_bridge_port *port);
2101void br_info_notify(int event, const struct net_bridge *br,
2102 const struct net_bridge_port *port, u32 filter);
2103int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2104 struct netlink_ext_ack *extack);
2105int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2106int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2107 u32 filter_mask, int nlflags);
2108int br_process_vlan_info(struct net_bridge *br,
2109 struct net_bridge_port *p, int cmd,
2110 struct bridge_vlan_info *vinfo_curr,
2111 struct bridge_vlan_info **vinfo_last,
2112 bool *changed,
2113 struct netlink_ext_ack *extack);
2114
2115#ifdef CONFIG_SYSFS
2116/* br_sysfs_if.c */
2117extern const struct sysfs_ops brport_sysfs_ops;
2118int br_sysfs_addif(struct net_bridge_port *p);
2119int br_sysfs_renameif(struct net_bridge_port *p);
2120
2121/* br_sysfs_br.c */
2122int br_sysfs_addbr(struct net_device *dev);
2123void br_sysfs_delbr(struct net_device *dev);
2124
2125#else
2126
2127static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2128static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2129static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2130static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2131#endif /* CONFIG_SYSFS */
2132
2133/* br_switchdev.c */
2134#ifdef CONFIG_NET_SWITCHDEV
2135int br_switchdev_port_offload(struct net_bridge_port *p,
2136 struct net_device *dev, const void *ctx,
2137 struct notifier_block *atomic_nb,
2138 struct notifier_block *blocking_nb,
2139 bool tx_fwd_offload,
2140 struct netlink_ext_ack *extack);
2141
2142void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2143 struct notifier_block *atomic_nb,
2144 struct notifier_block *blocking_nb);
2145
2146int br_switchdev_port_replay(struct net_bridge_port *p,
2147 struct net_device *dev, const void *ctx,
2148 struct notifier_block *atomic_nb,
2149 struct notifier_block *blocking_nb,
2150 struct netlink_ext_ack *extack);
2151
2152bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2153
2154void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2155
2156void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2157 struct sk_buff *skb);
2158void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2159 struct sk_buff *skb);
2160void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2161 struct sk_buff *skb);
2162bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2163 const struct sk_buff *skb);
2164int br_switchdev_set_port_flag(struct net_bridge_port *p,
2165 unsigned long flags,
2166 unsigned long mask,
2167 struct netlink_ext_ack *extack);
2168void br_switchdev_fdb_notify(struct net_bridge *br,
2169 const struct net_bridge_fdb_entry *fdb, int type);
2170void br_switchdev_mdb_notify(struct net_device *dev,
2171 struct net_bridge_mdb_entry *mp,
2172 struct net_bridge_port_group *pg,
2173 int type);
2174int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2175 bool changed, struct netlink_ext_ack *extack);
2176int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2177void br_switchdev_init(struct net_bridge *br);
2178
2179static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2180{
2181 skb->offload_fwd_mark = 0;
2182}
2183#else
2184static inline int
2185br_switchdev_port_offload(struct net_bridge_port *p,
2186 struct net_device *dev, const void *ctx,
2187 struct notifier_block *atomic_nb,
2188 struct notifier_block *blocking_nb,
2189 bool tx_fwd_offload,
2190 struct netlink_ext_ack *extack)
2191{
2192 return -EOPNOTSUPP;
2193}
2194
2195static inline void
2196br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2197 struct notifier_block *atomic_nb,
2198 struct notifier_block *blocking_nb)
2199{
2200}
2201
2202static inline int
2203br_switchdev_port_replay(struct net_bridge_port *p,
2204 struct net_device *dev, const void *ctx,
2205 struct notifier_block *atomic_nb,
2206 struct notifier_block *blocking_nb,
2207 struct netlink_ext_ack *extack)
2208{
2209 return -EOPNOTSUPP;
2210}
2211
2212static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2213{
2214 return false;
2215}
2216
2217static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2218{
2219}
2220
2221static inline void
2222nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2223 struct sk_buff *skb)
2224{
2225}
2226
2227static inline void
2228nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2229 struct sk_buff *skb)
2230{
2231}
2232
2233static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2234 struct sk_buff *skb)
2235{
2236}
2237
2238static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2239 const struct sk_buff *skb)
2240{
2241 return true;
2242}
2243
2244static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2245 unsigned long flags,
2246 unsigned long mask,
2247 struct netlink_ext_ack *extack)
2248{
2249 return 0;
2250}
2251
2252static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2253 u16 flags, bool changed,
2254 struct netlink_ext_ack *extack)
2255{
2256 return -EOPNOTSUPP;
2257}
2258
2259static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2260{
2261 return -EOPNOTSUPP;
2262}
2263
2264static inline void
2265br_switchdev_fdb_notify(struct net_bridge *br,
2266 const struct net_bridge_fdb_entry *fdb, int type)
2267{
2268}
2269
2270static inline void br_switchdev_mdb_notify(struct net_device *dev,
2271 struct net_bridge_mdb_entry *mp,
2272 struct net_bridge_port_group *pg,
2273 int type)
2274{
2275}
2276
2277static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2278{
2279}
2280
2281static inline void br_switchdev_init(struct net_bridge *br)
2282{
2283}
2284
2285#endif /* CONFIG_NET_SWITCHDEV */
2286
2287/* br_arp_nd_proxy.c */
2288void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2289void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2290 u16 vid, struct net_bridge_port *p);
2291void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2292 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2293struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2294bool br_is_neigh_suppress_enabled(const struct net_bridge_port *p, u16 vid);
2295#endif