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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#include <linux/refcount.h>
25
26#define BR_HASH_BITS 8
27#define BR_HASH_SIZE (1 << BR_HASH_BITS)
28
29#define BR_HOLD_TIME (1*HZ)
30
31#define BR_PORT_BITS 10
32#define BR_MAX_PORTS (1<<BR_PORT_BITS)
33
34#define BR_VERSION "2.3"
35
36/* Control of forwarding link local multicast */
37#define BR_GROUPFWD_DEFAULT 0
38/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
39enum {
40 BR_GROUPFWD_STP = BIT(0),
41 BR_GROUPFWD_MACPAUSE = BIT(1),
42 BR_GROUPFWD_LACP = BIT(2),
43};
44
45#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
46 BR_GROUPFWD_LACP)
47/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
48#define BR_GROUPFWD_8021AD 0xB801u
49
50/* Path to usermode spanning tree program */
51#define BR_STP_PROG "/sbin/bridge-stp"
52
53typedef struct bridge_id bridge_id;
54typedef struct mac_addr mac_addr;
55typedef __u16 port_id;
56
57struct bridge_id
58{
59 unsigned char prio[2];
60 unsigned char addr[ETH_ALEN];
61};
62
63struct mac_addr
64{
65 unsigned char addr[ETH_ALEN];
66};
67
68#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
69/* our own querier */
70struct bridge_mcast_own_query {
71 struct timer_list timer;
72 u32 startup_sent;
73};
74
75/* other querier */
76struct bridge_mcast_other_query {
77 struct timer_list timer;
78 unsigned long delay_time;
79};
80
81/* selected querier */
82struct bridge_mcast_querier {
83 struct br_ip addr;
84 struct net_bridge_port __rcu *port;
85};
86
87/* IGMP/MLD statistics */
88struct bridge_mcast_stats {
89 struct br_mcast_stats mstats;
90 struct u64_stats_sync syncp;
91};
92#endif
93
94struct br_vlan_stats {
95 u64 rx_bytes;
96 u64 rx_packets;
97 u64 tx_bytes;
98 u64 tx_packets;
99 struct u64_stats_sync syncp;
100};
101
102struct br_tunnel_info {
103 __be64 tunnel_id;
104 struct metadata_dst *tunnel_dst;
105};
106
107/**
108 * struct net_bridge_vlan - per-vlan entry
109 *
110 * @vnode: rhashtable member
111 * @vid: VLAN id
112 * @flags: bridge vlan flags
113 * @stats: per-cpu VLAN statistics
114 * @br: if MASTER flag set, this points to a bridge struct
115 * @port: if MASTER flag unset, this points to a port struct
116 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
117 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
118 * for this VLAN entry
119 * @vlist: sorted list of VLAN entries
120 * @rcu: used for entry destruction
121 *
122 * This structure is shared between the global per-VLAN entries contained in
123 * the bridge rhashtable and the local per-port per-VLAN entries contained in
124 * the port's rhashtable. The union entries should be interpreted depending on
125 * the entry flags that are set.
126 */
127struct net_bridge_vlan {
128 struct rhash_head vnode;
129 struct rhash_head tnode;
130 u16 vid;
131 u16 flags;
132 struct br_vlan_stats __percpu *stats;
133 union {
134 struct net_bridge *br;
135 struct net_bridge_port *port;
136 };
137 union {
138 refcount_t refcnt;
139 struct net_bridge_vlan *brvlan;
140 };
141
142 struct br_tunnel_info tinfo;
143
144 struct list_head vlist;
145
146 struct rcu_head rcu;
147};
148
149/**
150 * struct net_bridge_vlan_group
151 *
152 * @vlan_hash: VLAN entry rhashtable
153 * @vlan_list: sorted VLAN entry list
154 * @num_vlans: number of total VLAN entries
155 * @pvid: PVID VLAN id
156 *
157 * IMPORTANT: Be careful when checking if there're VLAN entries using list
158 * primitives because the bridge can have entries in its list which
159 * are just for global context but not for filtering, i.e. they have
160 * the master flag set but not the brentry flag. If you have to check
161 * if there're "real" entries in the bridge please test @num_vlans
162 */
163struct net_bridge_vlan_group {
164 struct rhashtable vlan_hash;
165 struct rhashtable tunnel_hash;
166 struct list_head vlan_list;
167 u16 num_vlans;
168 u16 pvid;
169};
170
171struct net_bridge_fdb_key {
172 mac_addr addr;
173 u16 vlan_id;
174};
175
176struct net_bridge_fdb_entry {
177 struct rhash_head rhnode;
178 struct net_bridge_port *dst;
179
180 struct net_bridge_fdb_key key;
181 struct hlist_node fdb_node;
182 unsigned char is_local:1,
183 is_static:1,
184 added_by_user:1,
185 added_by_external_learn:1,
186 offloaded:1;
187
188 /* write-heavy members should not affect lookups */
189 unsigned long updated ____cacheline_aligned_in_smp;
190 unsigned long used;
191
192 struct rcu_head rcu;
193};
194
195#define MDB_PG_FLAGS_PERMANENT BIT(0)
196#define MDB_PG_FLAGS_OFFLOAD BIT(1)
197
198struct net_bridge_port_group {
199 struct net_bridge_port *port;
200 struct net_bridge_port_group __rcu *next;
201 struct hlist_node mglist;
202 struct rcu_head rcu;
203 struct timer_list timer;
204 struct br_ip addr;
205 unsigned char flags;
206 unsigned char eth_addr[ETH_ALEN];
207};
208
209struct net_bridge_mdb_entry
210{
211 struct hlist_node hlist[2];
212 struct net_bridge *br;
213 struct net_bridge_port_group __rcu *ports;
214 struct rcu_head rcu;
215 struct timer_list timer;
216 struct br_ip addr;
217 bool host_joined;
218};
219
220struct net_bridge_mdb_htable
221{
222 struct hlist_head *mhash;
223 struct rcu_head rcu;
224 struct net_bridge_mdb_htable *old;
225 u32 size;
226 u32 max;
227 u32 secret;
228 u32 ver;
229};
230
231struct net_bridge_port {
232 struct net_bridge *br;
233 struct net_device *dev;
234 struct list_head list;
235
236 unsigned long flags;
237#ifdef CONFIG_BRIDGE_VLAN_FILTERING
238 struct net_bridge_vlan_group __rcu *vlgrp;
239#endif
240
241 /* STP */
242 u8 priority;
243 u8 state;
244 u16 port_no;
245 unsigned char topology_change_ack;
246 unsigned char config_pending;
247 port_id port_id;
248 port_id designated_port;
249 bridge_id designated_root;
250 bridge_id designated_bridge;
251 u32 path_cost;
252 u32 designated_cost;
253 unsigned long designated_age;
254
255 struct timer_list forward_delay_timer;
256 struct timer_list hold_timer;
257 struct timer_list message_age_timer;
258 struct kobject kobj;
259 struct rcu_head rcu;
260
261#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
262 struct bridge_mcast_own_query ip4_own_query;
263#if IS_ENABLED(CONFIG_IPV6)
264 struct bridge_mcast_own_query ip6_own_query;
265#endif /* IS_ENABLED(CONFIG_IPV6) */
266 unsigned char multicast_router;
267 struct bridge_mcast_stats __percpu *mcast_stats;
268 struct timer_list multicast_router_timer;
269 struct hlist_head mglist;
270 struct hlist_node rlist;
271#endif
272
273#ifdef CONFIG_SYSFS
274 char sysfs_name[IFNAMSIZ];
275#endif
276
277#ifdef CONFIG_NET_POLL_CONTROLLER
278 struct netpoll *np;
279#endif
280#ifdef CONFIG_NET_SWITCHDEV
281 int offload_fwd_mark;
282#endif
283 u16 group_fwd_mask;
284};
285
286#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
287#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
288
289#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
290
291static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
292{
293 return rcu_dereference(dev->rx_handler_data);
294}
295
296static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
297{
298 return br_port_exists(dev) ?
299 rtnl_dereference(dev->rx_handler_data) : NULL;
300}
301
302static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
303{
304 return br_port_exists(dev) ?
305 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
306}
307
308struct net_bridge {
309 spinlock_t lock;
310 spinlock_t hash_lock;
311 struct list_head port_list;
312 struct net_device *dev;
313 struct pcpu_sw_netstats __percpu *stats;
314 /* These fields are accessed on each packet */
315#ifdef CONFIG_BRIDGE_VLAN_FILTERING
316 u8 vlan_enabled;
317 u8 vlan_stats_enabled;
318 __be16 vlan_proto;
319 u16 default_pvid;
320 struct net_bridge_vlan_group __rcu *vlgrp;
321#endif
322
323 struct rhashtable fdb_hash_tbl;
324#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
325 union {
326 struct rtable fake_rtable;
327 struct rt6_info fake_rt6_info;
328 };
329 bool nf_call_iptables;
330 bool nf_call_ip6tables;
331 bool nf_call_arptables;
332#endif
333 u16 group_fwd_mask;
334 u16 group_fwd_mask_required;
335
336 /* STP */
337 bridge_id designated_root;
338 bridge_id bridge_id;
339 u32 root_path_cost;
340 unsigned char topology_change;
341 unsigned char topology_change_detected;
342 u16 root_port;
343 unsigned long max_age;
344 unsigned long hello_time;
345 unsigned long forward_delay;
346 unsigned long ageing_time;
347 unsigned long bridge_max_age;
348 unsigned long bridge_hello_time;
349 unsigned long bridge_forward_delay;
350 unsigned long bridge_ageing_time;
351
352 u8 group_addr[ETH_ALEN];
353 bool group_addr_set;
354
355 enum {
356 BR_NO_STP, /* no spanning tree */
357 BR_KERNEL_STP, /* old STP in kernel */
358 BR_USER_STP, /* new RSTP in userspace */
359 } stp_enabled;
360
361#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
362 unsigned char multicast_router;
363
364 u8 multicast_disabled:1;
365 u8 multicast_querier:1;
366 u8 multicast_query_use_ifaddr:1;
367 u8 has_ipv6_addr:1;
368 u8 multicast_stats_enabled:1;
369
370 u32 hash_elasticity;
371 u32 hash_max;
372
373 u32 multicast_last_member_count;
374 u32 multicast_startup_query_count;
375
376 u8 multicast_igmp_version;
377
378 unsigned long multicast_last_member_interval;
379 unsigned long multicast_membership_interval;
380 unsigned long multicast_querier_interval;
381 unsigned long multicast_query_interval;
382 unsigned long multicast_query_response_interval;
383 unsigned long multicast_startup_query_interval;
384
385 spinlock_t multicast_lock;
386 struct net_bridge_mdb_htable __rcu *mdb;
387 struct hlist_head router_list;
388
389 struct timer_list multicast_router_timer;
390 struct bridge_mcast_other_query ip4_other_query;
391 struct bridge_mcast_own_query ip4_own_query;
392 struct bridge_mcast_querier ip4_querier;
393 struct bridge_mcast_stats __percpu *mcast_stats;
394#if IS_ENABLED(CONFIG_IPV6)
395 struct bridge_mcast_other_query ip6_other_query;
396 struct bridge_mcast_own_query ip6_own_query;
397 struct bridge_mcast_querier ip6_querier;
398 u8 multicast_mld_version;
399#endif /* IS_ENABLED(CONFIG_IPV6) */
400#endif
401
402 struct timer_list hello_timer;
403 struct timer_list tcn_timer;
404 struct timer_list topology_change_timer;
405 struct delayed_work gc_work;
406 struct kobject *ifobj;
407 u32 auto_cnt;
408
409#ifdef CONFIG_NET_SWITCHDEV
410 int offload_fwd_mark;
411#endif
412 bool neigh_suppress_enabled;
413 bool mtu_set_by_user;
414 struct hlist_head fdb_list;
415};
416
417struct br_input_skb_cb {
418 struct net_device *brdev;
419
420#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
421 int igmp;
422 int mrouters_only;
423#endif
424
425 bool proxyarp_replied;
426
427#ifdef CONFIG_BRIDGE_VLAN_FILTERING
428 bool vlan_filtered;
429#endif
430
431#ifdef CONFIG_NET_SWITCHDEV
432 int offload_fwd_mark;
433#endif
434};
435
436#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
437
438#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
439# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
440#else
441# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
442#endif
443
444#define br_printk(level, br, format, args...) \
445 printk(level "%s: " format, (br)->dev->name, ##args)
446
447#define br_err(__br, format, args...) \
448 br_printk(KERN_ERR, __br, format, ##args)
449#define br_warn(__br, format, args...) \
450 br_printk(KERN_WARNING, __br, format, ##args)
451#define br_notice(__br, format, args...) \
452 br_printk(KERN_NOTICE, __br, format, ##args)
453#define br_info(__br, format, args...) \
454 br_printk(KERN_INFO, __br, format, ##args)
455
456#define br_debug(br, format, args...) \
457 pr_debug("%s: " format, (br)->dev->name, ##args)
458
459/* called under bridge lock */
460static inline int br_is_root_bridge(const struct net_bridge *br)
461{
462 return !memcmp(&br->bridge_id, &br->designated_root, 8);
463}
464
465/* check if a VLAN entry is global */
466static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
467{
468 return v->flags & BRIDGE_VLAN_INFO_MASTER;
469}
470
471/* check if a VLAN entry is used by the bridge */
472static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
473{
474 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
475}
476
477/* check if we should use the vlan entry, returns false if it's only context */
478static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
479{
480 if (br_vlan_is_master(v)) {
481 if (br_vlan_is_brentry(v))
482 return true;
483 else
484 return false;
485 }
486
487 return true;
488}
489
490/* br_device.c */
491void br_dev_setup(struct net_device *dev);
492void br_dev_delete(struct net_device *dev, struct list_head *list);
493netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
494#ifdef CONFIG_NET_POLL_CONTROLLER
495static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
496 struct sk_buff *skb)
497{
498 struct netpoll *np = p->np;
499
500 if (np)
501 netpoll_send_skb(np, skb);
502}
503
504int br_netpoll_enable(struct net_bridge_port *p);
505void br_netpoll_disable(struct net_bridge_port *p);
506#else
507static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
508 struct sk_buff *skb)
509{
510}
511
512static inline int br_netpoll_enable(struct net_bridge_port *p)
513{
514 return 0;
515}
516
517static inline void br_netpoll_disable(struct net_bridge_port *p)
518{
519}
520#endif
521
522/* br_fdb.c */
523int br_fdb_init(void);
524void br_fdb_fini(void);
525int br_fdb_hash_init(struct net_bridge *br);
526void br_fdb_hash_fini(struct net_bridge *br);
527void br_fdb_flush(struct net_bridge *br);
528void br_fdb_find_delete_local(struct net_bridge *br,
529 const struct net_bridge_port *p,
530 const unsigned char *addr, u16 vid);
531void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
532void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
533void br_fdb_cleanup(struct work_struct *work);
534void br_fdb_delete_by_port(struct net_bridge *br,
535 const struct net_bridge_port *p, u16 vid, int do_all);
536struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
537 const unsigned char *addr,
538 __u16 vid);
539int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
540int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
541 unsigned long off);
542int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
543 const unsigned char *addr, u16 vid);
544void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
545 const unsigned char *addr, u16 vid, bool added_by_user);
546
547int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
548 struct net_device *dev, const unsigned char *addr, u16 vid);
549int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
550 const unsigned char *addr, u16 vid, u16 nlh_flags);
551int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
552 struct net_device *dev, struct net_device *fdev, int *idx);
553int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
554void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
555int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
556 const unsigned char *addr, u16 vid);
557int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
558 const unsigned char *addr, u16 vid);
559void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
560 const unsigned char *addr, u16 vid);
561
562/* br_forward.c */
563enum br_pkt_type {
564 BR_PKT_UNICAST,
565 BR_PKT_MULTICAST,
566 BR_PKT_BROADCAST
567};
568int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
569void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
570 bool local_rcv, bool local_orig);
571int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
572void br_flood(struct net_bridge *br, struct sk_buff *skb,
573 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
574
575/* br_if.c */
576void br_port_carrier_check(struct net_bridge_port *p);
577int br_add_bridge(struct net *net, const char *name);
578int br_del_bridge(struct net *net, const char *name);
579int br_add_if(struct net_bridge *br, struct net_device *dev,
580 struct netlink_ext_ack *extack);
581int br_del_if(struct net_bridge *br, struct net_device *dev);
582void br_mtu_auto_adjust(struct net_bridge *br);
583netdev_features_t br_features_recompute(struct net_bridge *br,
584 netdev_features_t features);
585void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
586void br_manage_promisc(struct net_bridge *br);
587
588/* br_input.c */
589int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
590rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
591
592static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
593{
594 return rcu_dereference(dev->rx_handler) == br_handle_frame;
595}
596
597static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
598{
599 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
600}
601
602/* br_ioctl.c */
603int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
604int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
605 void __user *arg);
606
607/* br_multicast.c */
608#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
609extern unsigned int br_mdb_rehash_seq;
610int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
611 struct sk_buff *skb, u16 vid);
612struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
613 struct sk_buff *skb, u16 vid);
614int br_multicast_add_port(struct net_bridge_port *port);
615void br_multicast_del_port(struct net_bridge_port *port);
616void br_multicast_enable_port(struct net_bridge_port *port);
617void br_multicast_disable_port(struct net_bridge_port *port);
618void br_multicast_init(struct net_bridge *br);
619void br_multicast_open(struct net_bridge *br);
620void br_multicast_stop(struct net_bridge *br);
621void br_multicast_dev_del(struct net_bridge *br);
622void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
623 struct sk_buff *skb, bool local_rcv, bool local_orig);
624int br_multicast_set_router(struct net_bridge *br, unsigned long val);
625int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
626int br_multicast_toggle(struct net_bridge *br, unsigned long val);
627int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
628int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
629int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
630#if IS_ENABLED(CONFIG_IPV6)
631int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
632#endif
633struct net_bridge_mdb_entry *
634br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
635struct net_bridge_mdb_entry *
636br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
637 struct br_ip *group);
638void br_multicast_free_pg(struct rcu_head *head);
639struct net_bridge_port_group *
640br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
641 struct net_bridge_port_group __rcu *next,
642 unsigned char flags, const unsigned char *src);
643void br_mdb_init(void);
644void br_mdb_uninit(void);
645void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
646 struct br_ip *group, int type, u8 flags);
647void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
648 int type);
649void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
650 const struct sk_buff *skb, u8 type, u8 dir);
651int br_multicast_init_stats(struct net_bridge *br);
652void br_multicast_uninit_stats(struct net_bridge *br);
653void br_multicast_get_stats(const struct net_bridge *br,
654 const struct net_bridge_port *p,
655 struct br_mcast_stats *dest);
656
657#define mlock_dereference(X, br) \
658 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
659
660static inline bool br_multicast_is_router(struct net_bridge *br)
661{
662 return br->multicast_router == 2 ||
663 (br->multicast_router == 1 &&
664 timer_pending(&br->multicast_router_timer));
665}
666
667static inline bool
668__br_multicast_querier_exists(struct net_bridge *br,
669 struct bridge_mcast_other_query *querier,
670 const bool is_ipv6)
671{
672 bool own_querier_enabled;
673
674 if (br->multicast_querier) {
675 if (is_ipv6 && !br->has_ipv6_addr)
676 own_querier_enabled = false;
677 else
678 own_querier_enabled = true;
679 } else {
680 own_querier_enabled = false;
681 }
682
683 return time_is_before_jiffies(querier->delay_time) &&
684 (own_querier_enabled || timer_pending(&querier->timer));
685}
686
687static inline bool br_multicast_querier_exists(struct net_bridge *br,
688 struct ethhdr *eth)
689{
690 switch (eth->h_proto) {
691 case (htons(ETH_P_IP)):
692 return __br_multicast_querier_exists(br,
693 &br->ip4_other_query, false);
694#if IS_ENABLED(CONFIG_IPV6)
695 case (htons(ETH_P_IPV6)):
696 return __br_multicast_querier_exists(br,
697 &br->ip6_other_query, true);
698#endif
699 default:
700 return false;
701 }
702}
703
704static inline int br_multicast_igmp_type(const struct sk_buff *skb)
705{
706 return BR_INPUT_SKB_CB(skb)->igmp;
707}
708#else
709static inline int br_multicast_rcv(struct net_bridge *br,
710 struct net_bridge_port *port,
711 struct sk_buff *skb,
712 u16 vid)
713{
714 return 0;
715}
716
717static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
718 struct sk_buff *skb, u16 vid)
719{
720 return NULL;
721}
722
723static inline int br_multicast_add_port(struct net_bridge_port *port)
724{
725 return 0;
726}
727
728static inline void br_multicast_del_port(struct net_bridge_port *port)
729{
730}
731
732static inline void br_multicast_enable_port(struct net_bridge_port *port)
733{
734}
735
736static inline void br_multicast_disable_port(struct net_bridge_port *port)
737{
738}
739
740static inline void br_multicast_init(struct net_bridge *br)
741{
742}
743
744static inline void br_multicast_open(struct net_bridge *br)
745{
746}
747
748static inline void br_multicast_stop(struct net_bridge *br)
749{
750}
751
752static inline void br_multicast_dev_del(struct net_bridge *br)
753{
754}
755
756static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
757 struct sk_buff *skb,
758 bool local_rcv, bool local_orig)
759{
760}
761
762static inline bool br_multicast_is_router(struct net_bridge *br)
763{
764 return false;
765}
766
767static inline bool br_multicast_querier_exists(struct net_bridge *br,
768 struct ethhdr *eth)
769{
770 return false;
771}
772
773static inline void br_mdb_init(void)
774{
775}
776
777static inline void br_mdb_uninit(void)
778{
779}
780
781static inline void br_multicast_count(struct net_bridge *br,
782 const struct net_bridge_port *p,
783 const struct sk_buff *skb,
784 u8 type, u8 dir)
785{
786}
787
788static inline int br_multicast_init_stats(struct net_bridge *br)
789{
790 return 0;
791}
792
793static inline void br_multicast_uninit_stats(struct net_bridge *br)
794{
795}
796
797static inline int br_multicast_igmp_type(const struct sk_buff *skb)
798{
799 return 0;
800}
801#endif
802
803/* br_vlan.c */
804#ifdef CONFIG_BRIDGE_VLAN_FILTERING
805bool br_allowed_ingress(const struct net_bridge *br,
806 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
807 u16 *vid);
808bool br_allowed_egress(struct net_bridge_vlan_group *vg,
809 const struct sk_buff *skb);
810bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
811struct sk_buff *br_handle_vlan(struct net_bridge *br,
812 const struct net_bridge_port *port,
813 struct net_bridge_vlan_group *vg,
814 struct sk_buff *skb);
815int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
816 bool *changed);
817int br_vlan_delete(struct net_bridge *br, u16 vid);
818void br_vlan_flush(struct net_bridge *br);
819struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
820void br_recalculate_fwd_mask(struct net_bridge *br);
821int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
822int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
823int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
824int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
825int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
826int br_vlan_init(struct net_bridge *br);
827int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
828int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
829int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
830 bool *changed);
831int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
832void nbp_vlan_flush(struct net_bridge_port *port);
833int nbp_vlan_init(struct net_bridge_port *port);
834int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
835void br_vlan_get_stats(const struct net_bridge_vlan *v,
836 struct br_vlan_stats *stats);
837
838static inline struct net_bridge_vlan_group *br_vlan_group(
839 const struct net_bridge *br)
840{
841 return rtnl_dereference(br->vlgrp);
842}
843
844static inline struct net_bridge_vlan_group *nbp_vlan_group(
845 const struct net_bridge_port *p)
846{
847 return rtnl_dereference(p->vlgrp);
848}
849
850static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
851 const struct net_bridge *br)
852{
853 return rcu_dereference(br->vlgrp);
854}
855
856static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
857 const struct net_bridge_port *p)
858{
859 return rcu_dereference(p->vlgrp);
860}
861
862/* Since bridge now depends on 8021Q module, but the time bridge sees the
863 * skb, the vlan tag will always be present if the frame was tagged.
864 */
865static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
866{
867 int err = 0;
868
869 if (skb_vlan_tag_present(skb)) {
870 *vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
871 } else {
872 *vid = 0;
873 err = -EINVAL;
874 }
875
876 return err;
877}
878
879static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
880{
881 if (!vg)
882 return 0;
883
884 smp_rmb();
885 return vg->pvid;
886}
887
888#else
889static inline bool br_allowed_ingress(const struct net_bridge *br,
890 struct net_bridge_vlan_group *vg,
891 struct sk_buff *skb,
892 u16 *vid)
893{
894 return true;
895}
896
897static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
898 const struct sk_buff *skb)
899{
900 return true;
901}
902
903static inline bool br_should_learn(struct net_bridge_port *p,
904 struct sk_buff *skb, u16 *vid)
905{
906 return true;
907}
908
909static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
910 const struct net_bridge_port *port,
911 struct net_bridge_vlan_group *vg,
912 struct sk_buff *skb)
913{
914 return skb;
915}
916
917static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
918 bool *changed)
919{
920 *changed = false;
921 return -EOPNOTSUPP;
922}
923
924static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
925{
926 return -EOPNOTSUPP;
927}
928
929static inline void br_vlan_flush(struct net_bridge *br)
930{
931}
932
933static inline void br_recalculate_fwd_mask(struct net_bridge *br)
934{
935}
936
937static inline int br_vlan_init(struct net_bridge *br)
938{
939 return 0;
940}
941
942static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
943 bool *changed)
944{
945 *changed = false;
946 return -EOPNOTSUPP;
947}
948
949static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
950{
951 return -EOPNOTSUPP;
952}
953
954static inline void nbp_vlan_flush(struct net_bridge_port *port)
955{
956}
957
958static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
959 u16 vid)
960{
961 return NULL;
962}
963
964static inline int nbp_vlan_init(struct net_bridge_port *port)
965{
966 return 0;
967}
968
969static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
970{
971 return 0;
972}
973
974static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
975{
976 return 0;
977}
978
979static inline int __br_vlan_filter_toggle(struct net_bridge *br,
980 unsigned long val)
981{
982 return -EOPNOTSUPP;
983}
984
985static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
986 u32 filter_mask)
987{
988 return 0;
989}
990
991static inline struct net_bridge_vlan_group *br_vlan_group(
992 const struct net_bridge *br)
993{
994 return NULL;
995}
996
997static inline struct net_bridge_vlan_group *nbp_vlan_group(
998 const struct net_bridge_port *p)
999{
1000 return NULL;
1001}
1002
1003static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1004 const struct net_bridge *br)
1005{
1006 return NULL;
1007}
1008
1009static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1010 const struct net_bridge_port *p)
1011{
1012 return NULL;
1013}
1014
1015static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1016 struct br_vlan_stats *stats)
1017{
1018}
1019#endif
1020
1021struct nf_br_ops {
1022 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1023};
1024extern const struct nf_br_ops __rcu *nf_br_ops;
1025
1026/* br_netfilter.c */
1027#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1028int br_nf_core_init(void);
1029void br_nf_core_fini(void);
1030void br_netfilter_rtable_init(struct net_bridge *);
1031#else
1032static inline int br_nf_core_init(void) { return 0; }
1033static inline void br_nf_core_fini(void) {}
1034#define br_netfilter_rtable_init(x)
1035#endif
1036
1037/* br_stp.c */
1038void br_set_state(struct net_bridge_port *p, unsigned int state);
1039struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1040void br_init_port(struct net_bridge_port *p);
1041void br_become_designated_port(struct net_bridge_port *p);
1042
1043void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1044int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1045int br_set_hello_time(struct net_bridge *br, unsigned long x);
1046int br_set_max_age(struct net_bridge *br, unsigned long x);
1047int __set_ageing_time(struct net_device *dev, unsigned long t);
1048int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1049
1050
1051/* br_stp_if.c */
1052void br_stp_enable_bridge(struct net_bridge *br);
1053void br_stp_disable_bridge(struct net_bridge *br);
1054void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1055void br_stp_enable_port(struct net_bridge_port *p);
1056void br_stp_disable_port(struct net_bridge_port *p);
1057bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1058void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1059void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1060int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1061int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1062ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1063
1064/* br_stp_bpdu.c */
1065struct stp_proto;
1066void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1067 struct net_device *dev);
1068
1069/* br_stp_timer.c */
1070void br_stp_timer_init(struct net_bridge *br);
1071void br_stp_port_timer_init(struct net_bridge_port *p);
1072unsigned long br_timer_value(const struct timer_list *timer);
1073
1074/* br.c */
1075#if IS_ENABLED(CONFIG_ATM_LANE)
1076extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1077#endif
1078
1079/* br_netlink.c */
1080extern struct rtnl_link_ops br_link_ops;
1081int br_netlink_init(void);
1082void br_netlink_fini(void);
1083void br_ifinfo_notify(int event, const struct net_bridge *br,
1084 const struct net_bridge_port *port);
1085int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1086int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1087int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1088 u32 filter_mask, int nlflags);
1089
1090#ifdef CONFIG_SYSFS
1091/* br_sysfs_if.c */
1092extern const struct sysfs_ops brport_sysfs_ops;
1093int br_sysfs_addif(struct net_bridge_port *p);
1094int br_sysfs_renameif(struct net_bridge_port *p);
1095
1096/* br_sysfs_br.c */
1097int br_sysfs_addbr(struct net_device *dev);
1098void br_sysfs_delbr(struct net_device *dev);
1099
1100#else
1101
1102static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1103static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1104static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1105static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1106#endif /* CONFIG_SYSFS */
1107
1108/* br_switchdev.c */
1109#ifdef CONFIG_NET_SWITCHDEV
1110int nbp_switchdev_mark_set(struct net_bridge_port *p);
1111void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1112 struct sk_buff *skb);
1113bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1114 const struct sk_buff *skb);
1115int br_switchdev_set_port_flag(struct net_bridge_port *p,
1116 unsigned long flags,
1117 unsigned long mask);
1118void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
1119 int type);
1120
1121static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1122{
1123 skb->offload_fwd_mark = 0;
1124}
1125#else
1126static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1127{
1128 return 0;
1129}
1130
1131static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1132 struct sk_buff *skb)
1133{
1134}
1135
1136static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1137 const struct sk_buff *skb)
1138{
1139 return true;
1140}
1141
1142static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1143 unsigned long flags,
1144 unsigned long mask)
1145{
1146 return 0;
1147}
1148
1149static inline void
1150br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
1151{
1152}
1153
1154static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1155{
1156}
1157#endif /* CONFIG_NET_SWITCHDEV */
1158
1159/* br_arp_nd_proxy.c */
1160void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1161void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1162 u16 vid, struct net_bridge_port *p);
1163void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1164 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1165struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1166#endif
1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
7 */
8
9#ifndef _BR_PRIVATE_H
10#define _BR_PRIVATE_H
11
12#include <linux/netdevice.h>
13#include <linux/if_bridge.h>
14#include <linux/netpoll.h>
15#include <linux/u64_stats_sync.h>
16#include <net/route.h>
17#include <net/ip6_fib.h>
18#include <linux/if_vlan.h>
19#include <linux/rhashtable.h>
20#include <linux/refcount.h>
21
22#define BR_HASH_BITS 8
23#define BR_HASH_SIZE (1 << BR_HASH_BITS)
24
25#define BR_HOLD_TIME (1*HZ)
26
27#define BR_PORT_BITS 10
28#define BR_MAX_PORTS (1<<BR_PORT_BITS)
29
30#define BR_MULTICAST_DEFAULT_HASH_MAX 4096
31#define BR_MULTICAST_QUERY_INTVL_MIN msecs_to_jiffies(1000)
32#define BR_MULTICAST_STARTUP_QUERY_INTVL_MIN BR_MULTICAST_QUERY_INTVL_MIN
33
34#define BR_HWDOM_MAX BITS_PER_LONG
35
36#define BR_VERSION "2.3"
37
38/* Control of forwarding link local multicast */
39#define BR_GROUPFWD_DEFAULT 0
40/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
41enum {
42 BR_GROUPFWD_STP = BIT(0),
43 BR_GROUPFWD_MACPAUSE = BIT(1),
44 BR_GROUPFWD_LACP = BIT(2),
45};
46
47#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
48 BR_GROUPFWD_LACP)
49/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
50#define BR_GROUPFWD_8021AD 0xB801u
51
52/* Path to usermode spanning tree program */
53#define BR_STP_PROG "/sbin/bridge-stp"
54
55#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
56
57typedef struct bridge_id bridge_id;
58typedef struct mac_addr mac_addr;
59typedef __u16 port_id;
60
61struct bridge_id {
62 unsigned char prio[2];
63 unsigned char addr[ETH_ALEN];
64};
65
66struct mac_addr {
67 unsigned char addr[ETH_ALEN];
68};
69
70#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
71/* our own querier */
72struct bridge_mcast_own_query {
73 struct timer_list timer;
74 u32 startup_sent;
75};
76
77/* other querier */
78struct bridge_mcast_other_query {
79 struct timer_list timer;
80 unsigned long delay_time;
81};
82
83/* selected querier */
84struct bridge_mcast_querier {
85 struct br_ip addr;
86 int port_ifidx;
87 seqcount_spinlock_t seq;
88};
89
90/* IGMP/MLD statistics */
91struct bridge_mcast_stats {
92 struct br_mcast_stats mstats;
93 struct u64_stats_sync syncp;
94};
95
96struct br_mdb_src_entry {
97 struct br_ip addr;
98};
99
100struct br_mdb_config {
101 struct net_bridge *br;
102 struct net_bridge_port *p;
103 struct br_mdb_entry *entry;
104 struct br_ip group;
105 bool src_entry;
106 u8 filter_mode;
107 u16 nlflags;
108 struct br_mdb_src_entry *src_entries;
109 int num_src_entries;
110 u8 rt_protocol;
111};
112#endif
113
114/* net_bridge_mcast_port must be always defined due to forwarding stubs */
115struct net_bridge_mcast_port {
116#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
117 struct net_bridge_port *port;
118 struct net_bridge_vlan *vlan;
119
120 struct bridge_mcast_own_query ip4_own_query;
121 struct timer_list ip4_mc_router_timer;
122 struct hlist_node ip4_rlist;
123#if IS_ENABLED(CONFIG_IPV6)
124 struct bridge_mcast_own_query ip6_own_query;
125 struct timer_list ip6_mc_router_timer;
126 struct hlist_node ip6_rlist;
127#endif /* IS_ENABLED(CONFIG_IPV6) */
128 unsigned char multicast_router;
129#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
130};
131
132/* net_bridge_mcast must be always defined due to forwarding stubs */
133struct net_bridge_mcast {
134#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
135 struct net_bridge *br;
136 struct net_bridge_vlan *vlan;
137
138 u32 multicast_last_member_count;
139 u32 multicast_startup_query_count;
140
141 u8 multicast_querier;
142 u8 multicast_igmp_version;
143 u8 multicast_router;
144#if IS_ENABLED(CONFIG_IPV6)
145 u8 multicast_mld_version;
146#endif
147 unsigned long multicast_last_member_interval;
148 unsigned long multicast_membership_interval;
149 unsigned long multicast_querier_interval;
150 unsigned long multicast_query_interval;
151 unsigned long multicast_query_response_interval;
152 unsigned long multicast_startup_query_interval;
153 struct hlist_head ip4_mc_router_list;
154 struct timer_list ip4_mc_router_timer;
155 struct bridge_mcast_other_query ip4_other_query;
156 struct bridge_mcast_own_query ip4_own_query;
157 struct bridge_mcast_querier ip4_querier;
158#if IS_ENABLED(CONFIG_IPV6)
159 struct hlist_head ip6_mc_router_list;
160 struct timer_list ip6_mc_router_timer;
161 struct bridge_mcast_other_query ip6_other_query;
162 struct bridge_mcast_own_query ip6_own_query;
163 struct bridge_mcast_querier ip6_querier;
164#endif /* IS_ENABLED(CONFIG_IPV6) */
165#endif /* CONFIG_BRIDGE_IGMP_SNOOPING */
166};
167
168struct br_tunnel_info {
169 __be64 tunnel_id;
170 struct metadata_dst __rcu *tunnel_dst;
171};
172
173/* private vlan flags */
174enum {
175 BR_VLFLAG_PER_PORT_STATS = BIT(0),
176 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
177 BR_VLFLAG_MCAST_ENABLED = BIT(2),
178 BR_VLFLAG_GLOBAL_MCAST_ENABLED = BIT(3),
179};
180
181/**
182 * struct net_bridge_vlan - per-vlan entry
183 *
184 * @vnode: rhashtable member
185 * @vid: VLAN id
186 * @flags: bridge vlan flags
187 * @priv_flags: private (in-kernel) bridge vlan flags
188 * @state: STP state (e.g. blocking, learning, forwarding)
189 * @stats: per-cpu VLAN statistics
190 * @br: if MASTER flag set, this points to a bridge struct
191 * @port: if MASTER flag unset, this points to a port struct
192 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
193 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
194 * for this VLAN entry
195 * @br_mcast_ctx: if MASTER flag set, this is the global vlan multicast context
196 * @port_mcast_ctx: if MASTER flag unset, this is the per-port/vlan multicast
197 * context
198 * @msti: if MASTER flag set, this holds the VLANs MST instance
199 * @vlist: sorted list of VLAN entries
200 * @rcu: used for entry destruction
201 *
202 * This structure is shared between the global per-VLAN entries contained in
203 * the bridge rhashtable and the local per-port per-VLAN entries contained in
204 * the port's rhashtable. The union entries should be interpreted depending on
205 * the entry flags that are set.
206 */
207struct net_bridge_vlan {
208 struct rhash_head vnode;
209 struct rhash_head tnode;
210 u16 vid;
211 u16 flags;
212 u16 priv_flags;
213 u8 state;
214 struct pcpu_sw_netstats __percpu *stats;
215 union {
216 struct net_bridge *br;
217 struct net_bridge_port *port;
218 };
219 union {
220 refcount_t refcnt;
221 struct net_bridge_vlan *brvlan;
222 };
223
224 struct br_tunnel_info tinfo;
225
226 union {
227 struct net_bridge_mcast br_mcast_ctx;
228 struct net_bridge_mcast_port port_mcast_ctx;
229 };
230
231 u16 msti;
232
233 struct list_head vlist;
234
235 struct rcu_head rcu;
236};
237
238/**
239 * struct net_bridge_vlan_group
240 *
241 * @vlan_hash: VLAN entry rhashtable
242 * @vlan_list: sorted VLAN entry list
243 * @num_vlans: number of total VLAN entries
244 * @pvid: PVID VLAN id
245 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
246 *
247 * IMPORTANT: Be careful when checking if there're VLAN entries using list
248 * primitives because the bridge can have entries in its list which
249 * are just for global context but not for filtering, i.e. they have
250 * the master flag set but not the brentry flag. If you have to check
251 * if there're "real" entries in the bridge please test @num_vlans
252 */
253struct net_bridge_vlan_group {
254 struct rhashtable vlan_hash;
255 struct rhashtable tunnel_hash;
256 struct list_head vlan_list;
257 u16 num_vlans;
258 u16 pvid;
259 u8 pvid_state;
260};
261
262/* bridge fdb flags */
263enum {
264 BR_FDB_LOCAL,
265 BR_FDB_STATIC,
266 BR_FDB_STICKY,
267 BR_FDB_ADDED_BY_USER,
268 BR_FDB_ADDED_BY_EXT_LEARN,
269 BR_FDB_OFFLOADED,
270 BR_FDB_NOTIFY,
271 BR_FDB_NOTIFY_INACTIVE,
272 BR_FDB_LOCKED,
273};
274
275struct net_bridge_fdb_key {
276 mac_addr addr;
277 u16 vlan_id;
278};
279
280struct net_bridge_fdb_entry {
281 struct rhash_head rhnode;
282 struct net_bridge_port *dst;
283
284 struct net_bridge_fdb_key key;
285 struct hlist_node fdb_node;
286 unsigned long flags;
287
288 /* write-heavy members should not affect lookups */
289 unsigned long updated ____cacheline_aligned_in_smp;
290 unsigned long used;
291
292 struct rcu_head rcu;
293};
294
295struct net_bridge_fdb_flush_desc {
296 unsigned long flags;
297 unsigned long flags_mask;
298 int port_ifindex;
299 u16 vlan_id;
300};
301
302#define MDB_PG_FLAGS_PERMANENT BIT(0)
303#define MDB_PG_FLAGS_OFFLOAD BIT(1)
304#define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
305#define MDB_PG_FLAGS_STAR_EXCL BIT(3)
306#define MDB_PG_FLAGS_BLOCKED BIT(4)
307
308#define PG_SRC_ENT_LIMIT 32
309
310#define BR_SGRP_F_DELETE BIT(0)
311#define BR_SGRP_F_SEND BIT(1)
312#define BR_SGRP_F_INSTALLED BIT(2)
313#define BR_SGRP_F_USER_ADDED BIT(3)
314
315struct net_bridge_mcast_gc {
316 struct hlist_node gc_node;
317 void (*destroy)(struct net_bridge_mcast_gc *gc);
318};
319
320struct net_bridge_group_src {
321 struct hlist_node node;
322
323 struct br_ip addr;
324 struct net_bridge_port_group *pg;
325 u8 flags;
326 u8 src_query_rexmit_cnt;
327 struct timer_list timer;
328
329 struct net_bridge *br;
330 struct net_bridge_mcast_gc mcast_gc;
331 struct rcu_head rcu;
332};
333
334struct net_bridge_port_group_sg_key {
335 struct net_bridge_port *port;
336 struct br_ip addr;
337};
338
339struct net_bridge_port_group {
340 struct net_bridge_port_group __rcu *next;
341 struct net_bridge_port_group_sg_key key;
342 unsigned char eth_addr[ETH_ALEN] __aligned(2);
343 unsigned char flags;
344 unsigned char filter_mode;
345 unsigned char grp_query_rexmit_cnt;
346 unsigned char rt_protocol;
347
348 struct hlist_head src_list;
349 unsigned int src_ents;
350 struct timer_list timer;
351 struct timer_list rexmit_timer;
352 struct hlist_node mglist;
353 struct rb_root eht_set_tree;
354 struct rb_root eht_host_tree;
355
356 struct rhash_head rhnode;
357 struct net_bridge_mcast_gc mcast_gc;
358 struct rcu_head rcu;
359};
360
361struct net_bridge_mdb_entry {
362 struct rhash_head rhnode;
363 struct net_bridge *br;
364 struct net_bridge_port_group __rcu *ports;
365 struct br_ip addr;
366 bool host_joined;
367
368 struct timer_list timer;
369 struct hlist_node mdb_node;
370
371 struct net_bridge_mcast_gc mcast_gc;
372 struct rcu_head rcu;
373};
374
375struct net_bridge_port {
376 struct net_bridge *br;
377 struct net_device *dev;
378 netdevice_tracker dev_tracker;
379 struct list_head list;
380
381 unsigned long flags;
382#ifdef CONFIG_BRIDGE_VLAN_FILTERING
383 struct net_bridge_vlan_group __rcu *vlgrp;
384#endif
385 struct net_bridge_port __rcu *backup_port;
386
387 /* STP */
388 u8 priority;
389 u8 state;
390 u16 port_no;
391 unsigned char topology_change_ack;
392 unsigned char config_pending;
393 port_id port_id;
394 port_id designated_port;
395 bridge_id designated_root;
396 bridge_id designated_bridge;
397 u32 path_cost;
398 u32 designated_cost;
399 unsigned long designated_age;
400
401 struct timer_list forward_delay_timer;
402 struct timer_list hold_timer;
403 struct timer_list message_age_timer;
404 struct kobject kobj;
405 struct rcu_head rcu;
406
407 struct net_bridge_mcast_port multicast_ctx;
408
409#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
410 struct bridge_mcast_stats __percpu *mcast_stats;
411
412 u32 multicast_eht_hosts_limit;
413 u32 multicast_eht_hosts_cnt;
414 struct hlist_head mglist;
415#endif
416
417#ifdef CONFIG_SYSFS
418 char sysfs_name[IFNAMSIZ];
419#endif
420
421#ifdef CONFIG_NET_POLL_CONTROLLER
422 struct netpoll *np;
423#endif
424#ifdef CONFIG_NET_SWITCHDEV
425 /* Identifier used to group ports that share the same switchdev
426 * hardware domain.
427 */
428 int hwdom;
429 int offload_count;
430 struct netdev_phys_item_id ppid;
431#endif
432 u16 group_fwd_mask;
433 u16 backup_redirected_cnt;
434
435 struct bridge_stp_xstats stp_xstats;
436};
437
438#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
439
440#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
441#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
442
443static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
444{
445 return rcu_dereference(dev->rx_handler_data);
446}
447
448static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
449{
450 return netif_is_bridge_port(dev) ?
451 rtnl_dereference(dev->rx_handler_data) : NULL;
452}
453
454static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
455{
456 return netif_is_bridge_port(dev) ?
457 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
458}
459
460enum net_bridge_opts {
461 BROPT_VLAN_ENABLED,
462 BROPT_VLAN_STATS_ENABLED,
463 BROPT_NF_CALL_IPTABLES,
464 BROPT_NF_CALL_IP6TABLES,
465 BROPT_NF_CALL_ARPTABLES,
466 BROPT_GROUP_ADDR_SET,
467 BROPT_MULTICAST_ENABLED,
468 BROPT_MULTICAST_QUERY_USE_IFADDR,
469 BROPT_MULTICAST_STATS_ENABLED,
470 BROPT_HAS_IPV6_ADDR,
471 BROPT_NEIGH_SUPPRESS_ENABLED,
472 BROPT_MTU_SET_BY_USER,
473 BROPT_VLAN_STATS_PER_PORT,
474 BROPT_NO_LL_LEARN,
475 BROPT_VLAN_BRIDGE_BINDING,
476 BROPT_MCAST_VLAN_SNOOPING_ENABLED,
477 BROPT_MST_ENABLED,
478};
479
480struct net_bridge {
481 spinlock_t lock;
482 spinlock_t hash_lock;
483 struct hlist_head frame_type_list;
484 struct net_device *dev;
485 unsigned long options;
486 /* These fields are accessed on each packet */
487#ifdef CONFIG_BRIDGE_VLAN_FILTERING
488 __be16 vlan_proto;
489 u16 default_pvid;
490 struct net_bridge_vlan_group __rcu *vlgrp;
491#endif
492
493 struct rhashtable fdb_hash_tbl;
494 struct list_head port_list;
495#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
496 union {
497 struct rtable fake_rtable;
498 struct rt6_info fake_rt6_info;
499 };
500#endif
501 u16 group_fwd_mask;
502 u16 group_fwd_mask_required;
503
504 /* STP */
505 bridge_id designated_root;
506 bridge_id bridge_id;
507 unsigned char topology_change;
508 unsigned char topology_change_detected;
509 u16 root_port;
510 unsigned long max_age;
511 unsigned long hello_time;
512 unsigned long forward_delay;
513 unsigned long ageing_time;
514 unsigned long bridge_max_age;
515 unsigned long bridge_hello_time;
516 unsigned long bridge_forward_delay;
517 unsigned long bridge_ageing_time;
518 u32 root_path_cost;
519
520 u8 group_addr[ETH_ALEN];
521
522 enum {
523 BR_NO_STP, /* no spanning tree */
524 BR_KERNEL_STP, /* old STP in kernel */
525 BR_USER_STP, /* new RSTP in userspace */
526 } stp_enabled;
527
528 struct net_bridge_mcast multicast_ctx;
529
530#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
531 struct bridge_mcast_stats __percpu *mcast_stats;
532
533 u32 hash_max;
534
535 spinlock_t multicast_lock;
536
537 struct rhashtable mdb_hash_tbl;
538 struct rhashtable sg_port_tbl;
539
540 struct hlist_head mcast_gc_list;
541 struct hlist_head mdb_list;
542
543 struct work_struct mcast_gc_work;
544#endif
545
546 struct timer_list hello_timer;
547 struct timer_list tcn_timer;
548 struct timer_list topology_change_timer;
549 struct delayed_work gc_work;
550 struct kobject *ifobj;
551 u32 auto_cnt;
552
553#ifdef CONFIG_NET_SWITCHDEV
554 /* Counter used to make sure that hardware domains get unique
555 * identifiers in case a bridge spans multiple switchdev instances.
556 */
557 int last_hwdom;
558 /* Bit mask of hardware domain numbers in use */
559 unsigned long busy_hwdoms;
560#endif
561 struct hlist_head fdb_list;
562
563#if IS_ENABLED(CONFIG_BRIDGE_MRP)
564 struct hlist_head mrp_list;
565#endif
566#if IS_ENABLED(CONFIG_BRIDGE_CFM)
567 struct hlist_head mep_list;
568#endif
569};
570
571struct br_input_skb_cb {
572 struct net_device *brdev;
573
574 u16 frag_max_size;
575#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
576 u8 igmp;
577 u8 mrouters_only:1;
578#endif
579 u8 proxyarp_replied:1;
580 u8 src_port_isolated:1;
581#ifdef CONFIG_BRIDGE_VLAN_FILTERING
582 u8 vlan_filtered:1;
583#endif
584#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
585 u8 br_netfilter_broute:1;
586#endif
587
588#ifdef CONFIG_NET_SWITCHDEV
589 /* Set if TX data plane offloading is used towards at least one
590 * hardware domain.
591 */
592 u8 tx_fwd_offload:1;
593 /* The switchdev hardware domain from which this packet was received.
594 * If skb->offload_fwd_mark was set, then this packet was already
595 * forwarded by hardware to the other ports in the source hardware
596 * domain, otherwise it wasn't.
597 */
598 int src_hwdom;
599 /* Bit mask of hardware domains towards this packet has already been
600 * transmitted using the TX data plane offload.
601 */
602 unsigned long fwd_hwdoms;
603#endif
604};
605
606#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
607
608#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
609# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
610#else
611# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
612#endif
613
614#define br_printk(level, br, format, args...) \
615 printk(level "%s: " format, (br)->dev->name, ##args)
616
617#define br_err(__br, format, args...) \
618 br_printk(KERN_ERR, __br, format, ##args)
619#define br_warn(__br, format, args...) \
620 br_printk(KERN_WARNING, __br, format, ##args)
621#define br_notice(__br, format, args...) \
622 br_printk(KERN_NOTICE, __br, format, ##args)
623#define br_info(__br, format, args...) \
624 br_printk(KERN_INFO, __br, format, ##args)
625
626#define br_debug(br, format, args...) \
627 pr_debug("%s: " format, (br)->dev->name, ##args)
628
629/* called under bridge lock */
630static inline int br_is_root_bridge(const struct net_bridge *br)
631{
632 return !memcmp(&br->bridge_id, &br->designated_root, 8);
633}
634
635/* check if a VLAN entry is global */
636static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
637{
638 return v->flags & BRIDGE_VLAN_INFO_MASTER;
639}
640
641/* check if a VLAN entry is used by the bridge */
642static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
643{
644 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
645}
646
647/* check if we should use the vlan entry, returns false if it's only context */
648static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
649{
650 if (br_vlan_is_master(v)) {
651 if (br_vlan_is_brentry(v))
652 return true;
653 else
654 return false;
655 }
656
657 return true;
658}
659
660static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
661{
662 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
663}
664
665static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
666{
667 bool ret = vid > 0 && vid < VLAN_VID_MASK;
668
669 if (!ret)
670 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
671
672 return ret;
673}
674
675static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
676 const struct bridge_vlan_info *last,
677 struct netlink_ext_ack *extack)
678{
679 /* pvid flag is not allowed in ranges */
680 if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
681 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
682 return false;
683 }
684
685 /* when cur is the range end, check if:
686 * - it has range start flag
687 * - range ids are invalid (end is equal to or before start)
688 */
689 if (last) {
690 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
691 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
692 return false;
693 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
694 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
695 return false;
696 } else if (cur->vid <= last->vid) {
697 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
698 return false;
699 }
700 }
701
702 /* check for required range flags */
703 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
704 BRIDGE_VLAN_INFO_RANGE_END))) {
705 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
706 return false;
707 }
708
709 return true;
710}
711
712static inline u8 br_vlan_multicast_router(const struct net_bridge_vlan *v)
713{
714 u8 mcast_router = MDB_RTR_TYPE_DISABLED;
715
716#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
717 if (!br_vlan_is_master(v))
718 mcast_router = v->port_mcast_ctx.multicast_router;
719 else
720 mcast_router = v->br_mcast_ctx.multicast_router;
721#endif
722
723 return mcast_router;
724}
725
726static inline int br_afspec_cmd_to_rtm(int cmd)
727{
728 switch (cmd) {
729 case RTM_SETLINK:
730 return RTM_NEWVLAN;
731 case RTM_DELLINK:
732 return RTM_DELVLAN;
733 }
734
735 return 0;
736}
737
738static inline int br_opt_get(const struct net_bridge *br,
739 enum net_bridge_opts opt)
740{
741 return test_bit(opt, &br->options);
742}
743
744int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
745 struct netlink_ext_ack *extack);
746int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
747int br_boolopt_multi_toggle(struct net_bridge *br,
748 struct br_boolopt_multi *bm,
749 struct netlink_ext_ack *extack);
750void br_boolopt_multi_get(const struct net_bridge *br,
751 struct br_boolopt_multi *bm);
752void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
753
754/* br_device.c */
755void br_dev_setup(struct net_device *dev);
756void br_dev_delete(struct net_device *dev, struct list_head *list);
757netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
758#ifdef CONFIG_NET_POLL_CONTROLLER
759static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
760 struct sk_buff *skb)
761{
762 netpoll_send_skb(p->np, skb);
763}
764
765int br_netpoll_enable(struct net_bridge_port *p);
766void br_netpoll_disable(struct net_bridge_port *p);
767#else
768static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
769 struct sk_buff *skb)
770{
771}
772
773static inline int br_netpoll_enable(struct net_bridge_port *p)
774{
775 return 0;
776}
777
778static inline void br_netpoll_disable(struct net_bridge_port *p)
779{
780}
781#endif
782
783/* br_fdb.c */
784#define FDB_FLUSH_IGNORED_NDM_FLAGS (NTF_MASTER | NTF_SELF)
785#define FDB_FLUSH_ALLOWED_NDM_STATES (NUD_PERMANENT | NUD_NOARP)
786#define FDB_FLUSH_ALLOWED_NDM_FLAGS (NTF_USE | NTF_EXT_LEARNED | \
787 NTF_STICKY | NTF_OFFLOADED)
788
789int br_fdb_init(void);
790void br_fdb_fini(void);
791int br_fdb_hash_init(struct net_bridge *br);
792void br_fdb_hash_fini(struct net_bridge *br);
793void br_fdb_flush(struct net_bridge *br,
794 const struct net_bridge_fdb_flush_desc *desc);
795void br_fdb_find_delete_local(struct net_bridge *br,
796 const struct net_bridge_port *p,
797 const unsigned char *addr, u16 vid);
798void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
799void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
800void br_fdb_cleanup(struct work_struct *work);
801void br_fdb_delete_by_port(struct net_bridge *br,
802 const struct net_bridge_port *p, u16 vid, int do_all);
803struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
804 const unsigned char *addr,
805 __u16 vid);
806int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
807int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
808 unsigned long off);
809int br_fdb_add_local(struct net_bridge *br, struct net_bridge_port *source,
810 const unsigned char *addr, u16 vid);
811void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
812 const unsigned char *addr, u16 vid, unsigned long flags);
813
814int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
815 struct net_device *dev, const unsigned char *addr, u16 vid,
816 struct netlink_ext_ack *extack);
817int br_fdb_delete_bulk(struct ndmsg *ndm, struct nlattr *tb[],
818 struct net_device *dev, u16 vid,
819 struct netlink_ext_ack *extack);
820int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
821 const unsigned char *addr, u16 vid, u16 nlh_flags,
822 struct netlink_ext_ack *extack);
823int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
824 struct net_device *dev, struct net_device *fdev, int *idx);
825int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
826 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
827 struct netlink_ext_ack *extack);
828int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
829void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
830int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
831 const unsigned char *addr, u16 vid,
832 bool locked, bool swdev_notify);
833int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
834 const unsigned char *addr, u16 vid,
835 bool swdev_notify);
836void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
837 const unsigned char *addr, u16 vid, bool offloaded);
838
839/* br_forward.c */
840enum br_pkt_type {
841 BR_PKT_UNICAST,
842 BR_PKT_MULTICAST,
843 BR_PKT_BROADCAST
844};
845int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
846void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
847 bool local_rcv, bool local_orig);
848int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
849void br_flood(struct net_bridge *br, struct sk_buff *skb,
850 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
851
852/* return true if both source port and dest port are isolated */
853static inline bool br_skb_isolated(const struct net_bridge_port *to,
854 const struct sk_buff *skb)
855{
856 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
857 (to->flags & BR_ISOLATED);
858}
859
860/* br_if.c */
861void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
862int br_add_bridge(struct net *net, const char *name);
863int br_del_bridge(struct net *net, const char *name);
864int br_add_if(struct net_bridge *br, struct net_device *dev,
865 struct netlink_ext_ack *extack);
866int br_del_if(struct net_bridge *br, struct net_device *dev);
867void br_mtu_auto_adjust(struct net_bridge *br);
868netdev_features_t br_features_recompute(struct net_bridge *br,
869 netdev_features_t features);
870void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
871void br_manage_promisc(struct net_bridge *br);
872int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
873
874/* br_input.c */
875int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
876rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
877
878struct br_frame_type {
879 __be16 type;
880 int (*frame_handler)(struct net_bridge_port *port,
881 struct sk_buff *skb);
882 struct hlist_node list;
883};
884
885void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
886void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
887
888static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
889{
890 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
891}
892
893static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
894{
895 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
896}
897
898static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
899{
900 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
901}
902
903static inline struct net_bridge_port *
904br_port_get_check_rtnl(const struct net_device *dev)
905{
906 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
907}
908
909/* br_ioctl.c */
910int br_dev_siocdevprivate(struct net_device *dev, struct ifreq *rq,
911 void __user *data, int cmd);
912int br_ioctl_stub(struct net *net, struct net_bridge *br, unsigned int cmd,
913 struct ifreq *ifr, void __user *uarg);
914
915/* br_multicast.c */
916#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
917int br_multicast_rcv(struct net_bridge_mcast **brmctx,
918 struct net_bridge_mcast_port **pmctx,
919 struct net_bridge_vlan *vlan,
920 struct sk_buff *skb, u16 vid);
921struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
922 struct sk_buff *skb, u16 vid);
923int br_multicast_add_port(struct net_bridge_port *port);
924void br_multicast_del_port(struct net_bridge_port *port);
925void br_multicast_enable_port(struct net_bridge_port *port);
926void br_multicast_disable_port(struct net_bridge_port *port);
927void br_multicast_init(struct net_bridge *br);
928void br_multicast_join_snoopers(struct net_bridge *br);
929void br_multicast_leave_snoopers(struct net_bridge *br);
930void br_multicast_open(struct net_bridge *br);
931void br_multicast_stop(struct net_bridge *br);
932void br_multicast_dev_del(struct net_bridge *br);
933void br_multicast_flood(struct net_bridge_mdb_entry *mdst, struct sk_buff *skb,
934 struct net_bridge_mcast *brmctx,
935 bool local_rcv, bool local_orig);
936int br_multicast_set_router(struct net_bridge_mcast *brmctx, unsigned long val);
937int br_multicast_set_port_router(struct net_bridge_mcast_port *pmctx,
938 unsigned long val);
939int br_multicast_set_vlan_router(struct net_bridge_vlan *v, u8 mcast_router);
940int br_multicast_toggle(struct net_bridge *br, unsigned long val,
941 struct netlink_ext_ack *extack);
942int br_multicast_set_querier(struct net_bridge_mcast *brmctx, unsigned long val);
943int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
944int br_multicast_set_igmp_version(struct net_bridge_mcast *brmctx,
945 unsigned long val);
946#if IS_ENABLED(CONFIG_IPV6)
947int br_multicast_set_mld_version(struct net_bridge_mcast *brmctx,
948 unsigned long val);
949#endif
950struct net_bridge_mdb_entry *
951br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
952struct net_bridge_mdb_entry *
953br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
954struct net_bridge_port_group *
955br_multicast_new_port_group(struct net_bridge_port *port,
956 const struct br_ip *group,
957 struct net_bridge_port_group __rcu *next,
958 unsigned char flags, const unsigned char *src,
959 u8 filter_mode, u8 rt_protocol);
960int br_mdb_hash_init(struct net_bridge *br);
961void br_mdb_hash_fini(struct net_bridge *br);
962void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
963 struct net_bridge_port_group *pg, int type);
964void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
965 int type);
966void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
967 struct net_bridge_port_group *pg,
968 struct net_bridge_port_group __rcu **pp);
969void br_multicast_count(struct net_bridge *br,
970 const struct net_bridge_port *p,
971 const struct sk_buff *skb, u8 type, u8 dir);
972int br_multicast_init_stats(struct net_bridge *br);
973void br_multicast_uninit_stats(struct net_bridge *br);
974void br_multicast_get_stats(const struct net_bridge *br,
975 const struct net_bridge_port *p,
976 struct br_mcast_stats *dest);
977void br_mdb_init(void);
978void br_mdb_uninit(void);
979void br_multicast_host_join(const struct net_bridge_mcast *brmctx,
980 struct net_bridge_mdb_entry *mp, bool notify);
981void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
982void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
983 u8 filter_mode);
984void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
985 struct net_bridge_port_group *sg);
986struct net_bridge_group_src *
987br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
988struct net_bridge_group_src *
989br_multicast_new_group_src(struct net_bridge_port_group *pg,
990 struct br_ip *src_ip);
991void __br_multicast_del_group_src(struct net_bridge_group_src *src);
992void br_multicast_del_group_src(struct net_bridge_group_src *src,
993 bool fastleave);
994void br_multicast_ctx_init(struct net_bridge *br,
995 struct net_bridge_vlan *vlan,
996 struct net_bridge_mcast *brmctx);
997void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx);
998void br_multicast_port_ctx_init(struct net_bridge_port *port,
999 struct net_bridge_vlan *vlan,
1000 struct net_bridge_mcast_port *pmctx);
1001void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx);
1002void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan, bool on);
1003int br_multicast_toggle_vlan_snooping(struct net_bridge *br, bool on,
1004 struct netlink_ext_ack *extack);
1005bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan, bool on);
1006
1007int br_rports_fill_info(struct sk_buff *skb,
1008 const struct net_bridge_mcast *brmctx);
1009int br_multicast_dump_querier_state(struct sk_buff *skb,
1010 const struct net_bridge_mcast *brmctx,
1011 int nest_attr);
1012size_t br_multicast_querier_state_size(void);
1013size_t br_rports_size(const struct net_bridge_mcast *brmctx);
1014void br_multicast_set_query_intvl(struct net_bridge_mcast *brmctx,
1015 unsigned long val);
1016void br_multicast_set_startup_query_intvl(struct net_bridge_mcast *brmctx,
1017 unsigned long val);
1018
1019static inline bool br_group_is_l2(const struct br_ip *group)
1020{
1021 return group->proto == 0;
1022}
1023
1024#define mlock_dereference(X, br) \
1025 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
1026
1027static inline struct hlist_node *
1028br_multicast_get_first_rport_node(struct net_bridge_mcast *brmctx,
1029 struct sk_buff *skb)
1030{
1031#if IS_ENABLED(CONFIG_IPV6)
1032 if (skb->protocol == htons(ETH_P_IPV6))
1033 return rcu_dereference(hlist_first_rcu(&brmctx->ip6_mc_router_list));
1034#endif
1035 return rcu_dereference(hlist_first_rcu(&brmctx->ip4_mc_router_list));
1036}
1037
1038static inline struct net_bridge_port *
1039br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb)
1040{
1041 struct net_bridge_mcast_port *mctx;
1042
1043#if IS_ENABLED(CONFIG_IPV6)
1044 if (skb->protocol == htons(ETH_P_IPV6))
1045 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1046 ip6_rlist);
1047 else
1048#endif
1049 mctx = hlist_entry_safe(rp, struct net_bridge_mcast_port,
1050 ip4_rlist);
1051
1052 if (mctx)
1053 return mctx->port;
1054 else
1055 return NULL;
1056}
1057
1058static inline bool br_ip4_multicast_is_router(struct net_bridge_mcast *brmctx)
1059{
1060 return timer_pending(&brmctx->ip4_mc_router_timer);
1061}
1062
1063static inline bool br_ip6_multicast_is_router(struct net_bridge_mcast *brmctx)
1064{
1065#if IS_ENABLED(CONFIG_IPV6)
1066 return timer_pending(&brmctx->ip6_mc_router_timer);
1067#else
1068 return false;
1069#endif
1070}
1071
1072static inline bool
1073br_multicast_is_router(struct net_bridge_mcast *brmctx, struct sk_buff *skb)
1074{
1075 switch (brmctx->multicast_router) {
1076 case MDB_RTR_TYPE_PERM:
1077 return true;
1078 case MDB_RTR_TYPE_TEMP_QUERY:
1079 if (skb) {
1080 if (skb->protocol == htons(ETH_P_IP))
1081 return br_ip4_multicast_is_router(brmctx);
1082 else if (skb->protocol == htons(ETH_P_IPV6))
1083 return br_ip6_multicast_is_router(brmctx);
1084 } else {
1085 return br_ip4_multicast_is_router(brmctx) ||
1086 br_ip6_multicast_is_router(brmctx);
1087 }
1088 fallthrough;
1089 default:
1090 return false;
1091 }
1092}
1093
1094static inline bool
1095__br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1096 struct bridge_mcast_other_query *querier,
1097 const bool is_ipv6)
1098{
1099 bool own_querier_enabled;
1100
1101 if (brmctx->multicast_querier) {
1102 if (is_ipv6 && !br_opt_get(brmctx->br, BROPT_HAS_IPV6_ADDR))
1103 own_querier_enabled = false;
1104 else
1105 own_querier_enabled = true;
1106 } else {
1107 own_querier_enabled = false;
1108 }
1109
1110 return time_is_before_jiffies(querier->delay_time) &&
1111 (own_querier_enabled || timer_pending(&querier->timer));
1112}
1113
1114static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1115 struct ethhdr *eth,
1116 const struct net_bridge_mdb_entry *mdb)
1117{
1118 switch (eth->h_proto) {
1119 case (htons(ETH_P_IP)):
1120 return __br_multicast_querier_exists(brmctx,
1121 &brmctx->ip4_other_query, false);
1122#if IS_ENABLED(CONFIG_IPV6)
1123 case (htons(ETH_P_IPV6)):
1124 return __br_multicast_querier_exists(brmctx,
1125 &brmctx->ip6_other_query, true);
1126#endif
1127 default:
1128 return !!mdb && br_group_is_l2(&mdb->addr);
1129 }
1130}
1131
1132static inline bool br_multicast_is_star_g(const struct br_ip *ip)
1133{
1134 switch (ip->proto) {
1135 case htons(ETH_P_IP):
1136 return ipv4_is_zeronet(ip->src.ip4);
1137#if IS_ENABLED(CONFIG_IPV6)
1138 case htons(ETH_P_IPV6):
1139 return ipv6_addr_any(&ip->src.ip6);
1140#endif
1141 default:
1142 return false;
1143 }
1144}
1145
1146static inline bool
1147br_multicast_should_handle_mode(const struct net_bridge_mcast *brmctx,
1148 __be16 proto)
1149{
1150 switch (proto) {
1151 case htons(ETH_P_IP):
1152 return !!(brmctx->multicast_igmp_version == 3);
1153#if IS_ENABLED(CONFIG_IPV6)
1154 case htons(ETH_P_IPV6):
1155 return !!(brmctx->multicast_mld_version == 2);
1156#endif
1157 default:
1158 return false;
1159 }
1160}
1161
1162static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1163{
1164 return BR_INPUT_SKB_CB(skb)->igmp;
1165}
1166
1167static inline unsigned long br_multicast_lmqt(const struct net_bridge_mcast *brmctx)
1168{
1169 return brmctx->multicast_last_member_interval *
1170 brmctx->multicast_last_member_count;
1171}
1172
1173static inline unsigned long br_multicast_gmi(const struct net_bridge_mcast *brmctx)
1174{
1175 return brmctx->multicast_membership_interval;
1176}
1177
1178static inline bool
1179br_multicast_ctx_is_vlan(const struct net_bridge_mcast *brmctx)
1180{
1181 return !!brmctx->vlan;
1182}
1183
1184static inline bool
1185br_multicast_port_ctx_is_vlan(const struct net_bridge_mcast_port *pmctx)
1186{
1187 return !!pmctx->vlan;
1188}
1189
1190static inline struct net_bridge_mcast *
1191br_multicast_port_ctx_get_global(const struct net_bridge_mcast_port *pmctx)
1192{
1193 if (!br_multicast_port_ctx_is_vlan(pmctx))
1194 return &pmctx->port->br->multicast_ctx;
1195 else
1196 return &pmctx->vlan->brvlan->br_mcast_ctx;
1197}
1198
1199static inline bool
1200br_multicast_ctx_vlan_global_disabled(const struct net_bridge_mcast *brmctx)
1201{
1202 return br_multicast_ctx_is_vlan(brmctx) &&
1203 (!br_opt_get(brmctx->br, BROPT_MCAST_VLAN_SNOOPING_ENABLED) ||
1204 !(brmctx->vlan->priv_flags & BR_VLFLAG_GLOBAL_MCAST_ENABLED));
1205}
1206
1207static inline bool
1208br_multicast_ctx_vlan_disabled(const struct net_bridge_mcast *brmctx)
1209{
1210 return br_multicast_ctx_is_vlan(brmctx) &&
1211 !(brmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1212}
1213
1214static inline bool
1215br_multicast_port_ctx_vlan_disabled(const struct net_bridge_mcast_port *pmctx)
1216{
1217 return br_multicast_port_ctx_is_vlan(pmctx) &&
1218 !(pmctx->vlan->priv_flags & BR_VLFLAG_MCAST_ENABLED);
1219}
1220
1221static inline bool
1222br_multicast_port_ctx_state_disabled(const struct net_bridge_mcast_port *pmctx)
1223{
1224 return pmctx->port->state == BR_STATE_DISABLED ||
1225 (br_multicast_port_ctx_is_vlan(pmctx) &&
1226 (br_multicast_port_ctx_vlan_disabled(pmctx) ||
1227 pmctx->vlan->state == BR_STATE_DISABLED));
1228}
1229
1230static inline bool
1231br_multicast_port_ctx_state_stopped(const struct net_bridge_mcast_port *pmctx)
1232{
1233 return br_multicast_port_ctx_state_disabled(pmctx) ||
1234 pmctx->port->state == BR_STATE_BLOCKING ||
1235 (br_multicast_port_ctx_is_vlan(pmctx) &&
1236 pmctx->vlan->state == BR_STATE_BLOCKING);
1237}
1238
1239static inline bool
1240br_rports_have_mc_router(const struct net_bridge_mcast *brmctx)
1241{
1242#if IS_ENABLED(CONFIG_IPV6)
1243 return !hlist_empty(&brmctx->ip4_mc_router_list) ||
1244 !hlist_empty(&brmctx->ip6_mc_router_list);
1245#else
1246 return !hlist_empty(&brmctx->ip4_mc_router_list);
1247#endif
1248}
1249
1250static inline bool
1251br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1252 const struct net_bridge_mcast *brmctx2)
1253{
1254 return brmctx1->multicast_igmp_version ==
1255 brmctx2->multicast_igmp_version &&
1256 brmctx1->multicast_last_member_count ==
1257 brmctx2->multicast_last_member_count &&
1258 brmctx1->multicast_startup_query_count ==
1259 brmctx2->multicast_startup_query_count &&
1260 brmctx1->multicast_last_member_interval ==
1261 brmctx2->multicast_last_member_interval &&
1262 brmctx1->multicast_membership_interval ==
1263 brmctx2->multicast_membership_interval &&
1264 brmctx1->multicast_querier_interval ==
1265 brmctx2->multicast_querier_interval &&
1266 brmctx1->multicast_query_interval ==
1267 brmctx2->multicast_query_interval &&
1268 brmctx1->multicast_query_response_interval ==
1269 brmctx2->multicast_query_response_interval &&
1270 brmctx1->multicast_startup_query_interval ==
1271 brmctx2->multicast_startup_query_interval &&
1272 brmctx1->multicast_querier == brmctx2->multicast_querier &&
1273 brmctx1->multicast_router == brmctx2->multicast_router &&
1274 !br_rports_have_mc_router(brmctx1) &&
1275 !br_rports_have_mc_router(brmctx2) &&
1276#if IS_ENABLED(CONFIG_IPV6)
1277 brmctx1->multicast_mld_version ==
1278 brmctx2->multicast_mld_version &&
1279#endif
1280 true;
1281}
1282
1283static inline bool
1284br_multicast_ctx_matches_vlan_snooping(const struct net_bridge_mcast *brmctx)
1285{
1286 bool vlan_snooping_enabled;
1287
1288 vlan_snooping_enabled = !!br_opt_get(brmctx->br,
1289 BROPT_MCAST_VLAN_SNOOPING_ENABLED);
1290
1291 return !!(vlan_snooping_enabled == br_multicast_ctx_is_vlan(brmctx));
1292}
1293#else
1294static inline int br_multicast_rcv(struct net_bridge_mcast **brmctx,
1295 struct net_bridge_mcast_port **pmctx,
1296 struct net_bridge_vlan *vlan,
1297 struct sk_buff *skb,
1298 u16 vid)
1299{
1300 return 0;
1301}
1302
1303static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge_mcast *brmctx,
1304 struct sk_buff *skb, u16 vid)
1305{
1306 return NULL;
1307}
1308
1309static inline int br_multicast_add_port(struct net_bridge_port *port)
1310{
1311 return 0;
1312}
1313
1314static inline void br_multicast_del_port(struct net_bridge_port *port)
1315{
1316}
1317
1318static inline void br_multicast_enable_port(struct net_bridge_port *port)
1319{
1320}
1321
1322static inline void br_multicast_disable_port(struct net_bridge_port *port)
1323{
1324}
1325
1326static inline void br_multicast_init(struct net_bridge *br)
1327{
1328}
1329
1330static inline void br_multicast_join_snoopers(struct net_bridge *br)
1331{
1332}
1333
1334static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1335{
1336}
1337
1338static inline void br_multicast_open(struct net_bridge *br)
1339{
1340}
1341
1342static inline void br_multicast_stop(struct net_bridge *br)
1343{
1344}
1345
1346static inline void br_multicast_dev_del(struct net_bridge *br)
1347{
1348}
1349
1350static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1351 struct sk_buff *skb,
1352 struct net_bridge_mcast *brmctx,
1353 bool local_rcv, bool local_orig)
1354{
1355}
1356
1357static inline bool br_multicast_is_router(struct net_bridge_mcast *brmctx,
1358 struct sk_buff *skb)
1359{
1360 return false;
1361}
1362
1363static inline bool br_multicast_querier_exists(struct net_bridge_mcast *brmctx,
1364 struct ethhdr *eth,
1365 const struct net_bridge_mdb_entry *mdb)
1366{
1367 return false;
1368}
1369
1370static inline void br_mdb_init(void)
1371{
1372}
1373
1374static inline void br_mdb_uninit(void)
1375{
1376}
1377
1378static inline int br_mdb_hash_init(struct net_bridge *br)
1379{
1380 return 0;
1381}
1382
1383static inline void br_mdb_hash_fini(struct net_bridge *br)
1384{
1385}
1386
1387static inline void br_multicast_count(struct net_bridge *br,
1388 const struct net_bridge_port *p,
1389 const struct sk_buff *skb,
1390 u8 type, u8 dir)
1391{
1392}
1393
1394static inline int br_multicast_init_stats(struct net_bridge *br)
1395{
1396 return 0;
1397}
1398
1399static inline void br_multicast_uninit_stats(struct net_bridge *br)
1400{
1401}
1402
1403static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1404{
1405 return 0;
1406}
1407
1408static inline void br_multicast_ctx_init(struct net_bridge *br,
1409 struct net_bridge_vlan *vlan,
1410 struct net_bridge_mcast *brmctx)
1411{
1412}
1413
1414static inline void br_multicast_ctx_deinit(struct net_bridge_mcast *brmctx)
1415{
1416}
1417
1418static inline void br_multicast_port_ctx_init(struct net_bridge_port *port,
1419 struct net_bridge_vlan *vlan,
1420 struct net_bridge_mcast_port *pmctx)
1421{
1422}
1423
1424static inline void br_multicast_port_ctx_deinit(struct net_bridge_mcast_port *pmctx)
1425{
1426}
1427
1428static inline void br_multicast_toggle_one_vlan(struct net_bridge_vlan *vlan,
1429 bool on)
1430{
1431}
1432
1433static inline int br_multicast_toggle_vlan_snooping(struct net_bridge *br,
1434 bool on,
1435 struct netlink_ext_ack *extack)
1436{
1437 return -EOPNOTSUPP;
1438}
1439
1440static inline bool br_multicast_toggle_global_vlan(struct net_bridge_vlan *vlan,
1441 bool on)
1442{
1443 return false;
1444}
1445
1446static inline bool
1447br_multicast_ctx_options_equal(const struct net_bridge_mcast *brmctx1,
1448 const struct net_bridge_mcast *brmctx2)
1449{
1450 return true;
1451}
1452#endif
1453
1454/* br_vlan.c */
1455#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1456bool br_allowed_ingress(const struct net_bridge *br,
1457 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1458 u16 *vid, u8 *state,
1459 struct net_bridge_vlan **vlan);
1460bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1461 const struct sk_buff *skb);
1462bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1463struct sk_buff *br_handle_vlan(struct net_bridge *br,
1464 const struct net_bridge_port *port,
1465 struct net_bridge_vlan_group *vg,
1466 struct sk_buff *skb);
1467int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1468 bool *changed, struct netlink_ext_ack *extack);
1469int br_vlan_delete(struct net_bridge *br, u16 vid);
1470void br_vlan_flush(struct net_bridge *br);
1471struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1472void br_recalculate_fwd_mask(struct net_bridge *br);
1473int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1474 struct netlink_ext_ack *extack);
1475int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1476 struct netlink_ext_ack *extack);
1477int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1478 struct netlink_ext_ack *extack);
1479int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1480int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1481int br_vlan_init(struct net_bridge *br);
1482int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1483 struct netlink_ext_ack *extack);
1484int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1485 struct netlink_ext_ack *extack);
1486int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1487 bool *changed, struct netlink_ext_ack *extack);
1488int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1489void nbp_vlan_flush(struct net_bridge_port *port);
1490int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1491int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1492void br_vlan_get_stats(const struct net_bridge_vlan *v,
1493 struct pcpu_sw_netstats *stats);
1494void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1495int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1496 void *ptr);
1497void br_vlan_rtnl_init(void);
1498void br_vlan_rtnl_uninit(void);
1499void br_vlan_notify(const struct net_bridge *br,
1500 const struct net_bridge_port *p,
1501 u16 vid, u16 vid_range,
1502 int cmd);
1503bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1504 const struct net_bridge_vlan *range_end);
1505
1506void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1507 struct net_device_path_ctx *ctx,
1508 struct net_device_path *path);
1509int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1510 struct net_bridge_port *dst,
1511 struct net_device_path *path);
1512
1513static inline struct net_bridge_vlan_group *br_vlan_group(
1514 const struct net_bridge *br)
1515{
1516 return rtnl_dereference(br->vlgrp);
1517}
1518
1519static inline struct net_bridge_vlan_group *nbp_vlan_group(
1520 const struct net_bridge_port *p)
1521{
1522 return rtnl_dereference(p->vlgrp);
1523}
1524
1525static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1526 const struct net_bridge *br)
1527{
1528 return rcu_dereference(br->vlgrp);
1529}
1530
1531static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1532 const struct net_bridge_port *p)
1533{
1534 return rcu_dereference(p->vlgrp);
1535}
1536
1537/* Since bridge now depends on 8021Q module, but the time bridge sees the
1538 * skb, the vlan tag will always be present if the frame was tagged.
1539 */
1540static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1541{
1542 int err = 0;
1543
1544 if (skb_vlan_tag_present(skb)) {
1545 *vid = skb_vlan_tag_get_id(skb);
1546 } else {
1547 *vid = 0;
1548 err = -EINVAL;
1549 }
1550
1551 return err;
1552}
1553
1554static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1555{
1556 if (!vg)
1557 return 0;
1558
1559 smp_rmb();
1560 return vg->pvid;
1561}
1562
1563static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1564{
1565 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1566}
1567#else
1568static inline bool br_allowed_ingress(const struct net_bridge *br,
1569 struct net_bridge_vlan_group *vg,
1570 struct sk_buff *skb,
1571 u16 *vid, u8 *state,
1572 struct net_bridge_vlan **vlan)
1573
1574{
1575 *vlan = NULL;
1576 return true;
1577}
1578
1579static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1580 const struct sk_buff *skb)
1581{
1582 return true;
1583}
1584
1585static inline bool br_should_learn(struct net_bridge_port *p,
1586 struct sk_buff *skb, u16 *vid)
1587{
1588 return true;
1589}
1590
1591static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1592 const struct net_bridge_port *port,
1593 struct net_bridge_vlan_group *vg,
1594 struct sk_buff *skb)
1595{
1596 return skb;
1597}
1598
1599static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1600 bool *changed, struct netlink_ext_ack *extack)
1601{
1602 *changed = false;
1603 return -EOPNOTSUPP;
1604}
1605
1606static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1607{
1608 return -EOPNOTSUPP;
1609}
1610
1611static inline void br_vlan_flush(struct net_bridge *br)
1612{
1613}
1614
1615static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1616{
1617}
1618
1619static inline int br_vlan_init(struct net_bridge *br)
1620{
1621 return 0;
1622}
1623
1624static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1625 bool *changed, struct netlink_ext_ack *extack)
1626{
1627 *changed = false;
1628 return -EOPNOTSUPP;
1629}
1630
1631static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1632{
1633 return -EOPNOTSUPP;
1634}
1635
1636static inline void nbp_vlan_flush(struct net_bridge_port *port)
1637{
1638}
1639
1640static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1641 u16 vid)
1642{
1643 return NULL;
1644}
1645
1646static inline int nbp_vlan_init(struct net_bridge_port *port,
1647 struct netlink_ext_ack *extack)
1648{
1649 return 0;
1650}
1651
1652static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1653{
1654 return 0;
1655}
1656
1657static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1658{
1659 return 0;
1660}
1661
1662static inline int br_vlan_filter_toggle(struct net_bridge *br,
1663 unsigned long val,
1664 struct netlink_ext_ack *extack)
1665{
1666 return -EOPNOTSUPP;
1667}
1668
1669static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1670 u32 filter_mask)
1671{
1672 return 0;
1673}
1674
1675static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1676 struct net_device_path_ctx *ctx,
1677 struct net_device_path *path)
1678{
1679}
1680
1681static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1682 struct net_bridge_port *dst,
1683 struct net_device_path *path)
1684{
1685 return 0;
1686}
1687
1688static inline struct net_bridge_vlan_group *br_vlan_group(
1689 const struct net_bridge *br)
1690{
1691 return NULL;
1692}
1693
1694static inline struct net_bridge_vlan_group *nbp_vlan_group(
1695 const struct net_bridge_port *p)
1696{
1697 return NULL;
1698}
1699
1700static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1701 const struct net_bridge *br)
1702{
1703 return NULL;
1704}
1705
1706static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1707 const struct net_bridge_port *p)
1708{
1709 return NULL;
1710}
1711
1712static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1713 struct pcpu_sw_netstats *stats)
1714{
1715}
1716
1717static inline void br_vlan_port_event(struct net_bridge_port *p,
1718 unsigned long event)
1719{
1720}
1721
1722static inline int br_vlan_bridge_event(struct net_device *dev,
1723 unsigned long event, void *ptr)
1724{
1725 return 0;
1726}
1727
1728static inline void br_vlan_rtnl_init(void)
1729{
1730}
1731
1732static inline void br_vlan_rtnl_uninit(void)
1733{
1734}
1735
1736static inline void br_vlan_notify(const struct net_bridge *br,
1737 const struct net_bridge_port *p,
1738 u16 vid, u16 vid_range,
1739 int cmd)
1740{
1741}
1742
1743static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1744 const struct net_bridge_vlan *range_end)
1745{
1746 return true;
1747}
1748
1749static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1750{
1751 return 0;
1752}
1753
1754#endif
1755
1756/* br_vlan_options.c */
1757#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1758bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1759 const struct net_bridge_vlan *range_end);
1760bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1761size_t br_vlan_opts_nl_size(void);
1762int br_vlan_process_options(const struct net_bridge *br,
1763 const struct net_bridge_port *p,
1764 struct net_bridge_vlan *range_start,
1765 struct net_bridge_vlan *range_end,
1766 struct nlattr **tb,
1767 struct netlink_ext_ack *extack);
1768int br_vlan_rtm_process_global_options(struct net_device *dev,
1769 const struct nlattr *attr,
1770 int cmd,
1771 struct netlink_ext_ack *extack);
1772bool br_vlan_global_opts_can_enter_range(const struct net_bridge_vlan *v_curr,
1773 const struct net_bridge_vlan *r_end);
1774bool br_vlan_global_opts_fill(struct sk_buff *skb, u16 vid, u16 vid_range,
1775 const struct net_bridge_vlan *v_opts);
1776
1777/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1778static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1779{
1780 return READ_ONCE(v->state);
1781}
1782
1783static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1784{
1785 WRITE_ONCE(v->state, state);
1786}
1787
1788static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1789{
1790 return READ_ONCE(vg->pvid_state);
1791}
1792
1793static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1794 u8 state)
1795{
1796 WRITE_ONCE(vg->pvid_state, state);
1797}
1798
1799/* learn_allow is true at ingress and false at egress */
1800static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1801{
1802 switch (state) {
1803 case BR_STATE_LEARNING:
1804 return learn_allow;
1805 case BR_STATE_FORWARDING:
1806 return true;
1807 default:
1808 return false;
1809 }
1810}
1811#endif
1812
1813/* br_mst.c */
1814#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1815DECLARE_STATIC_KEY_FALSE(br_mst_used);
1816static inline bool br_mst_is_enabled(struct net_bridge *br)
1817{
1818 return static_branch_unlikely(&br_mst_used) &&
1819 br_opt_get(br, BROPT_MST_ENABLED);
1820}
1821
1822int br_mst_set_state(struct net_bridge_port *p, u16 msti, u8 state,
1823 struct netlink_ext_ack *extack);
1824int br_mst_vlan_set_msti(struct net_bridge_vlan *v, u16 msti);
1825void br_mst_vlan_init_state(struct net_bridge_vlan *v);
1826int br_mst_set_enabled(struct net_bridge *br, bool on,
1827 struct netlink_ext_ack *extack);
1828size_t br_mst_info_size(const struct net_bridge_vlan_group *vg);
1829int br_mst_fill_info(struct sk_buff *skb,
1830 const struct net_bridge_vlan_group *vg);
1831int br_mst_process(struct net_bridge_port *p, const struct nlattr *mst_attr,
1832 struct netlink_ext_ack *extack);
1833#else
1834static inline bool br_mst_is_enabled(struct net_bridge *br)
1835{
1836 return false;
1837}
1838
1839static inline int br_mst_set_state(struct net_bridge_port *p, u16 msti,
1840 u8 state, struct netlink_ext_ack *extack)
1841{
1842 return -EOPNOTSUPP;
1843}
1844
1845static inline int br_mst_set_enabled(struct net_bridge *br, bool on,
1846 struct netlink_ext_ack *extack)
1847{
1848 return -EOPNOTSUPP;
1849}
1850
1851static inline size_t br_mst_info_size(const struct net_bridge_vlan_group *vg)
1852{
1853 return 0;
1854}
1855
1856static inline int br_mst_fill_info(struct sk_buff *skb,
1857 const struct net_bridge_vlan_group *vg)
1858{
1859 return -EOPNOTSUPP;
1860}
1861
1862static inline int br_mst_process(struct net_bridge_port *p,
1863 const struct nlattr *mst_attr,
1864 struct netlink_ext_ack *extack)
1865{
1866 return -EOPNOTSUPP;
1867}
1868#endif
1869
1870struct nf_br_ops {
1871 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1872};
1873extern const struct nf_br_ops __rcu *nf_br_ops;
1874
1875/* br_netfilter.c */
1876#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1877int br_nf_core_init(void);
1878void br_nf_core_fini(void);
1879void br_netfilter_rtable_init(struct net_bridge *);
1880#else
1881static inline int br_nf_core_init(void) { return 0; }
1882static inline void br_nf_core_fini(void) {}
1883#define br_netfilter_rtable_init(x)
1884#endif
1885
1886/* br_stp.c */
1887void br_set_state(struct net_bridge_port *p, unsigned int state);
1888struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1889void br_init_port(struct net_bridge_port *p);
1890void br_become_designated_port(struct net_bridge_port *p);
1891
1892void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1893int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1894int br_set_hello_time(struct net_bridge *br, unsigned long x);
1895int br_set_max_age(struct net_bridge *br, unsigned long x);
1896int __set_ageing_time(struct net_device *dev, unsigned long t);
1897int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1898
1899
1900/* br_stp_if.c */
1901void br_stp_enable_bridge(struct net_bridge *br);
1902void br_stp_disable_bridge(struct net_bridge *br);
1903int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1904 struct netlink_ext_ack *extack);
1905void br_stp_enable_port(struct net_bridge_port *p);
1906void br_stp_disable_port(struct net_bridge_port *p);
1907bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1908void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1909void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1910int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1911int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1912ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1913
1914/* br_stp_bpdu.c */
1915struct stp_proto;
1916void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1917 struct net_device *dev);
1918
1919/* br_stp_timer.c */
1920void br_stp_timer_init(struct net_bridge *br);
1921void br_stp_port_timer_init(struct net_bridge_port *p);
1922unsigned long br_timer_value(const struct timer_list *timer);
1923
1924/* br.c */
1925#if IS_ENABLED(CONFIG_ATM_LANE)
1926extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1927#endif
1928
1929/* br_mrp.c */
1930#if IS_ENABLED(CONFIG_BRIDGE_MRP)
1931int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1932 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1933bool br_mrp_enabled(struct net_bridge *br);
1934void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1935int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1936#else
1937static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1938 struct nlattr *attr, int cmd,
1939 struct netlink_ext_ack *extack)
1940{
1941 return -EOPNOTSUPP;
1942}
1943
1944static inline bool br_mrp_enabled(struct net_bridge *br)
1945{
1946 return false;
1947}
1948
1949static inline void br_mrp_port_del(struct net_bridge *br,
1950 struct net_bridge_port *p)
1951{
1952}
1953
1954static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1955{
1956 return 0;
1957}
1958
1959#endif
1960
1961/* br_cfm.c */
1962#if IS_ENABLED(CONFIG_BRIDGE_CFM)
1963int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1964 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1965bool br_cfm_created(struct net_bridge *br);
1966void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1967int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1968int br_cfm_status_fill_info(struct sk_buff *skb,
1969 struct net_bridge *br,
1970 bool getlink);
1971int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1972int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1973#else
1974static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1975 struct nlattr *attr, int cmd,
1976 struct netlink_ext_ack *extack)
1977{
1978 return -EOPNOTSUPP;
1979}
1980
1981static inline bool br_cfm_created(struct net_bridge *br)
1982{
1983 return false;
1984}
1985
1986static inline void br_cfm_port_del(struct net_bridge *br,
1987 struct net_bridge_port *p)
1988{
1989}
1990
1991static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1992{
1993 return -EOPNOTSUPP;
1994}
1995
1996static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1997 struct net_bridge *br,
1998 bool getlink)
1999{
2000 return -EOPNOTSUPP;
2001}
2002
2003static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
2004{
2005 *count = 0;
2006 return -EOPNOTSUPP;
2007}
2008
2009static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
2010{
2011 *count = 0;
2012 return -EOPNOTSUPP;
2013}
2014#endif
2015
2016/* br_netlink.c */
2017extern struct rtnl_link_ops br_link_ops;
2018int br_netlink_init(void);
2019void br_netlink_fini(void);
2020void br_ifinfo_notify(int event, const struct net_bridge *br,
2021 const struct net_bridge_port *port);
2022void br_info_notify(int event, const struct net_bridge *br,
2023 const struct net_bridge_port *port, u32 filter);
2024int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
2025 struct netlink_ext_ack *extack);
2026int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
2027int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
2028 u32 filter_mask, int nlflags);
2029int br_process_vlan_info(struct net_bridge *br,
2030 struct net_bridge_port *p, int cmd,
2031 struct bridge_vlan_info *vinfo_curr,
2032 struct bridge_vlan_info **vinfo_last,
2033 bool *changed,
2034 struct netlink_ext_ack *extack);
2035
2036#ifdef CONFIG_SYSFS
2037/* br_sysfs_if.c */
2038extern const struct sysfs_ops brport_sysfs_ops;
2039int br_sysfs_addif(struct net_bridge_port *p);
2040int br_sysfs_renameif(struct net_bridge_port *p);
2041
2042/* br_sysfs_br.c */
2043int br_sysfs_addbr(struct net_device *dev);
2044void br_sysfs_delbr(struct net_device *dev);
2045
2046#else
2047
2048static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
2049static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
2050static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
2051static inline void br_sysfs_delbr(struct net_device *dev) { return; }
2052#endif /* CONFIG_SYSFS */
2053
2054/* br_switchdev.c */
2055#ifdef CONFIG_NET_SWITCHDEV
2056int br_switchdev_port_offload(struct net_bridge_port *p,
2057 struct net_device *dev, const void *ctx,
2058 struct notifier_block *atomic_nb,
2059 struct notifier_block *blocking_nb,
2060 bool tx_fwd_offload,
2061 struct netlink_ext_ack *extack);
2062
2063void br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2064 struct notifier_block *atomic_nb,
2065 struct notifier_block *blocking_nb);
2066
2067bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb);
2068
2069void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb);
2070
2071void nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2072 struct sk_buff *skb);
2073void nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2074 struct sk_buff *skb);
2075void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2076 struct sk_buff *skb);
2077bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2078 const struct sk_buff *skb);
2079int br_switchdev_set_port_flag(struct net_bridge_port *p,
2080 unsigned long flags,
2081 unsigned long mask,
2082 struct netlink_ext_ack *extack);
2083void br_switchdev_fdb_notify(struct net_bridge *br,
2084 const struct net_bridge_fdb_entry *fdb, int type);
2085void br_switchdev_mdb_notify(struct net_device *dev,
2086 struct net_bridge_mdb_entry *mp,
2087 struct net_bridge_port_group *pg,
2088 int type);
2089int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
2090 bool changed, struct netlink_ext_ack *extack);
2091int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
2092void br_switchdev_init(struct net_bridge *br);
2093
2094static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2095{
2096 skb->offload_fwd_mark = 0;
2097}
2098#else
2099static inline int
2100br_switchdev_port_offload(struct net_bridge_port *p,
2101 struct net_device *dev, const void *ctx,
2102 struct notifier_block *atomic_nb,
2103 struct notifier_block *blocking_nb,
2104 bool tx_fwd_offload,
2105 struct netlink_ext_ack *extack)
2106{
2107 return -EOPNOTSUPP;
2108}
2109
2110static inline void
2111br_switchdev_port_unoffload(struct net_bridge_port *p, const void *ctx,
2112 struct notifier_block *atomic_nb,
2113 struct notifier_block *blocking_nb)
2114{
2115}
2116
2117static inline bool br_switchdev_frame_uses_tx_fwd_offload(struct sk_buff *skb)
2118{
2119 return false;
2120}
2121
2122static inline void br_switchdev_frame_set_offload_fwd_mark(struct sk_buff *skb)
2123{
2124}
2125
2126static inline void
2127nbp_switchdev_frame_mark_tx_fwd_offload(const struct net_bridge_port *p,
2128 struct sk_buff *skb)
2129{
2130}
2131
2132static inline void
2133nbp_switchdev_frame_mark_tx_fwd_to_hwdom(const struct net_bridge_port *p,
2134 struct sk_buff *skb)
2135{
2136}
2137
2138static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
2139 struct sk_buff *skb)
2140{
2141}
2142
2143static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
2144 const struct sk_buff *skb)
2145{
2146 return true;
2147}
2148
2149static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
2150 unsigned long flags,
2151 unsigned long mask,
2152 struct netlink_ext_ack *extack)
2153{
2154 return 0;
2155}
2156
2157static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid,
2158 u16 flags, bool changed,
2159 struct netlink_ext_ack *extack)
2160{
2161 return -EOPNOTSUPP;
2162}
2163
2164static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
2165{
2166 return -EOPNOTSUPP;
2167}
2168
2169static inline void
2170br_switchdev_fdb_notify(struct net_bridge *br,
2171 const struct net_bridge_fdb_entry *fdb, int type)
2172{
2173}
2174
2175static inline void br_switchdev_mdb_notify(struct net_device *dev,
2176 struct net_bridge_mdb_entry *mp,
2177 struct net_bridge_port_group *pg,
2178 int type)
2179{
2180}
2181
2182static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
2183{
2184}
2185
2186static inline void br_switchdev_init(struct net_bridge *br)
2187{
2188}
2189
2190#endif /* CONFIG_NET_SWITCHDEV */
2191
2192/* br_arp_nd_proxy.c */
2193void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
2194void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
2195 u16 vid, struct net_bridge_port *p);
2196void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
2197 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
2198struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
2199#endif