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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
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_VERSION "2.3"
31
32/* Path to usermode spanning tree program */
33#define BR_STP_PROG "/sbin/bridge-stp"
34
35typedef struct bridge_id bridge_id;
36typedef struct mac_addr mac_addr;
37typedef __u16 port_id;
38
39struct bridge_id
40{
41 unsigned char prio[2];
42 unsigned char addr[6];
43};
44
45struct mac_addr
46{
47 unsigned char addr[6];
48};
49
50struct br_ip
51{
52 union {
53 __be32 ip4;
54#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
55 struct in6_addr ip6;
56#endif
57 } u;
58 __be16 proto;
59};
60
61struct net_bridge_fdb_entry
62{
63 struct hlist_node hlist;
64 struct net_bridge_port *dst;
65
66 struct rcu_head rcu;
67 unsigned long updated;
68 unsigned long used;
69 mac_addr addr;
70 unsigned char is_local;
71 unsigned char is_static;
72};
73
74struct net_bridge_port_group {
75 struct net_bridge_port *port;
76 struct net_bridge_port_group __rcu *next;
77 struct hlist_node mglist;
78 struct rcu_head rcu;
79 struct timer_list timer;
80 struct timer_list query_timer;
81 struct br_ip addr;
82 u32 queries_sent;
83};
84
85struct net_bridge_mdb_entry
86{
87 struct hlist_node hlist[2];
88 struct net_bridge *br;
89 struct net_bridge_port_group __rcu *ports;
90 struct rcu_head rcu;
91 struct timer_list timer;
92 struct timer_list query_timer;
93 struct br_ip addr;
94 bool mglist;
95 u32 queries_sent;
96};
97
98struct net_bridge_mdb_htable
99{
100 struct hlist_head *mhash;
101 struct rcu_head rcu;
102 struct net_bridge_mdb_htable *old;
103 u32 size;
104 u32 max;
105 u32 secret;
106 u32 ver;
107};
108
109struct net_bridge_port
110{
111 struct net_bridge *br;
112 struct net_device *dev;
113 struct list_head list;
114
115 /* STP */
116 u8 priority;
117 u8 state;
118 u16 port_no;
119 unsigned char topology_change_ack;
120 unsigned char config_pending;
121 port_id port_id;
122 port_id designated_port;
123 bridge_id designated_root;
124 bridge_id designated_bridge;
125 u32 path_cost;
126 u32 designated_cost;
127 unsigned long designated_age;
128
129 struct timer_list forward_delay_timer;
130 struct timer_list hold_timer;
131 struct timer_list message_age_timer;
132 struct kobject kobj;
133 struct rcu_head rcu;
134
135 unsigned long flags;
136#define BR_HAIRPIN_MODE 0x00000001
137
138#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
139 u32 multicast_startup_queries_sent;
140 unsigned char multicast_router;
141 struct timer_list multicast_router_timer;
142 struct timer_list multicast_query_timer;
143 struct hlist_head mglist;
144 struct hlist_node rlist;
145#endif
146
147#ifdef CONFIG_SYSFS
148 char sysfs_name[IFNAMSIZ];
149#endif
150
151#ifdef CONFIG_NET_POLL_CONTROLLER
152 struct netpoll *np;
153#endif
154};
155
156#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
157
158static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
159{
160 struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
161 return br_port_exists(dev) ? port : NULL;
162}
163
164static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
165{
166 return br_port_exists(dev) ?
167 rtnl_dereference(dev->rx_handler_data) : NULL;
168}
169
170struct br_cpu_netstats {
171 u64 rx_packets;
172 u64 rx_bytes;
173 u64 tx_packets;
174 u64 tx_bytes;
175 struct u64_stats_sync syncp;
176};
177
178struct net_bridge
179{
180 spinlock_t lock;
181 struct list_head port_list;
182 struct net_device *dev;
183
184 struct br_cpu_netstats __percpu *stats;
185 spinlock_t hash_lock;
186 struct hlist_head hash[BR_HASH_SIZE];
187#ifdef CONFIG_BRIDGE_NETFILTER
188 struct rtable fake_rtable;
189 bool nf_call_iptables;
190 bool nf_call_ip6tables;
191 bool nf_call_arptables;
192#endif
193 unsigned long flags;
194#define BR_SET_MAC_ADDR 0x00000001
195
196 /* STP */
197 bridge_id designated_root;
198 bridge_id bridge_id;
199 u32 root_path_cost;
200 unsigned long max_age;
201 unsigned long hello_time;
202 unsigned long forward_delay;
203 unsigned long bridge_max_age;
204 unsigned long ageing_time;
205 unsigned long bridge_hello_time;
206 unsigned long bridge_forward_delay;
207
208 u8 group_addr[ETH_ALEN];
209 u16 root_port;
210
211 enum {
212 BR_NO_STP, /* no spanning tree */
213 BR_KERNEL_STP, /* old STP in kernel */
214 BR_USER_STP, /* new RSTP in userspace */
215 } stp_enabled;
216
217 unsigned char topology_change;
218 unsigned char topology_change_detected;
219
220#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
221 unsigned char multicast_router;
222
223 u8 multicast_disabled:1;
224
225 u32 hash_elasticity;
226 u32 hash_max;
227
228 u32 multicast_last_member_count;
229 u32 multicast_startup_queries_sent;
230 u32 multicast_startup_query_count;
231
232 unsigned long multicast_last_member_interval;
233 unsigned long multicast_membership_interval;
234 unsigned long multicast_querier_interval;
235 unsigned long multicast_query_interval;
236 unsigned long multicast_query_response_interval;
237 unsigned long multicast_startup_query_interval;
238
239 spinlock_t multicast_lock;
240 struct net_bridge_mdb_htable __rcu *mdb;
241 struct hlist_head router_list;
242
243 struct timer_list multicast_router_timer;
244 struct timer_list multicast_querier_timer;
245 struct timer_list multicast_query_timer;
246#endif
247
248 struct timer_list hello_timer;
249 struct timer_list tcn_timer;
250 struct timer_list topology_change_timer;
251 struct timer_list gc_timer;
252 struct kobject *ifobj;
253};
254
255struct br_input_skb_cb {
256 struct net_device *brdev;
257#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
258 int igmp;
259 int mrouters_only;
260#endif
261};
262
263#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
264
265#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
266# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
267#else
268# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
269#endif
270
271#define br_printk(level, br, format, args...) \
272 printk(level "%s: " format, (br)->dev->name, ##args)
273
274#define br_err(__br, format, args...) \
275 br_printk(KERN_ERR, __br, format, ##args)
276#define br_warn(__br, format, args...) \
277 br_printk(KERN_WARNING, __br, format, ##args)
278#define br_notice(__br, format, args...) \
279 br_printk(KERN_NOTICE, __br, format, ##args)
280#define br_info(__br, format, args...) \
281 br_printk(KERN_INFO, __br, format, ##args)
282
283#define br_debug(br, format, args...) \
284 pr_debug("%s: " format, (br)->dev->name, ##args)
285
286extern struct notifier_block br_device_notifier;
287extern const u8 br_group_address[ETH_ALEN];
288
289/* called under bridge lock */
290static inline int br_is_root_bridge(const struct net_bridge *br)
291{
292 return !memcmp(&br->bridge_id, &br->designated_root, 8);
293}
294
295/* br_device.c */
296extern void br_dev_setup(struct net_device *dev);
297extern void br_dev_delete(struct net_device *dev, struct list_head *list);
298extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
299 struct net_device *dev);
300#ifdef CONFIG_NET_POLL_CONTROLLER
301static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
302{
303 return br->dev->npinfo;
304}
305
306static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
307 struct sk_buff *skb)
308{
309 struct netpoll *np = p->np;
310
311 if (np)
312 netpoll_send_skb(np, skb);
313}
314
315extern int br_netpoll_enable(struct net_bridge_port *p);
316extern void br_netpoll_disable(struct net_bridge_port *p);
317#else
318static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
319{
320 return NULL;
321}
322
323static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
324 struct sk_buff *skb)
325{
326}
327
328static inline int br_netpoll_enable(struct net_bridge_port *p)
329{
330 return 0;
331}
332
333static inline void br_netpoll_disable(struct net_bridge_port *p)
334{
335}
336#endif
337
338/* br_fdb.c */
339extern int br_fdb_init(void);
340extern void br_fdb_fini(void);
341extern void br_fdb_flush(struct net_bridge *br);
342extern void br_fdb_changeaddr(struct net_bridge_port *p,
343 const unsigned char *newaddr);
344extern void br_fdb_cleanup(unsigned long arg);
345extern void br_fdb_delete_by_port(struct net_bridge *br,
346 const struct net_bridge_port *p, int do_all);
347extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
348 const unsigned char *addr);
349extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
350extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
351 unsigned long count, unsigned long off);
352extern int br_fdb_insert(struct net_bridge *br,
353 struct net_bridge_port *source,
354 const unsigned char *addr);
355extern void br_fdb_update(struct net_bridge *br,
356 struct net_bridge_port *source,
357 const unsigned char *addr);
358extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
359extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
360extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
361
362/* br_forward.c */
363extern void br_deliver(const struct net_bridge_port *to,
364 struct sk_buff *skb);
365extern int br_dev_queue_push_xmit(struct sk_buff *skb);
366extern void br_forward(const struct net_bridge_port *to,
367 struct sk_buff *skb, struct sk_buff *skb0);
368extern int br_forward_finish(struct sk_buff *skb);
369extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
370extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
371 struct sk_buff *skb2);
372
373/* br_if.c */
374extern void br_port_carrier_check(struct net_bridge_port *p);
375extern int br_add_bridge(struct net *net, const char *name);
376extern int br_del_bridge(struct net *net, const char *name);
377extern void br_net_exit(struct net *net);
378extern int br_add_if(struct net_bridge *br,
379 struct net_device *dev);
380extern int br_del_if(struct net_bridge *br,
381 struct net_device *dev);
382extern int br_min_mtu(const struct net_bridge *br);
383extern u32 br_features_recompute(struct net_bridge *br, u32 features);
384
385/* br_input.c */
386extern int br_handle_frame_finish(struct sk_buff *skb);
387extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
388
389/* br_ioctl.c */
390extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
391extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
392
393/* br_multicast.c */
394#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
395extern int br_multicast_rcv(struct net_bridge *br,
396 struct net_bridge_port *port,
397 struct sk_buff *skb);
398extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
399 struct sk_buff *skb);
400extern void br_multicast_add_port(struct net_bridge_port *port);
401extern void br_multicast_del_port(struct net_bridge_port *port);
402extern void br_multicast_enable_port(struct net_bridge_port *port);
403extern void br_multicast_disable_port(struct net_bridge_port *port);
404extern void br_multicast_init(struct net_bridge *br);
405extern void br_multicast_open(struct net_bridge *br);
406extern void br_multicast_stop(struct net_bridge *br);
407extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
408 struct sk_buff *skb);
409extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
410 struct sk_buff *skb, struct sk_buff *skb2);
411extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
412extern int br_multicast_set_port_router(struct net_bridge_port *p,
413 unsigned long val);
414extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
415extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
416
417static inline bool br_multicast_is_router(struct net_bridge *br)
418{
419 return br->multicast_router == 2 ||
420 (br->multicast_router == 1 &&
421 timer_pending(&br->multicast_router_timer));
422}
423#else
424static inline int br_multicast_rcv(struct net_bridge *br,
425 struct net_bridge_port *port,
426 struct sk_buff *skb)
427{
428 return 0;
429}
430
431static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
432 struct sk_buff *skb)
433{
434 return NULL;
435}
436
437static inline void br_multicast_add_port(struct net_bridge_port *port)
438{
439}
440
441static inline void br_multicast_del_port(struct net_bridge_port *port)
442{
443}
444
445static inline void br_multicast_enable_port(struct net_bridge_port *port)
446{
447}
448
449static inline void br_multicast_disable_port(struct net_bridge_port *port)
450{
451}
452
453static inline void br_multicast_init(struct net_bridge *br)
454{
455}
456
457static inline void br_multicast_open(struct net_bridge *br)
458{
459}
460
461static inline void br_multicast_stop(struct net_bridge *br)
462{
463}
464
465static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
466 struct sk_buff *skb)
467{
468}
469
470static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
471 struct sk_buff *skb,
472 struct sk_buff *skb2)
473{
474}
475static inline bool br_multicast_is_router(struct net_bridge *br)
476{
477 return 0;
478}
479#endif
480
481/* br_netfilter.c */
482#ifdef CONFIG_BRIDGE_NETFILTER
483extern int br_netfilter_init(void);
484extern void br_netfilter_fini(void);
485extern void br_netfilter_rtable_init(struct net_bridge *);
486#else
487#define br_netfilter_init() (0)
488#define br_netfilter_fini() do { } while(0)
489#define br_netfilter_rtable_init(x)
490#endif
491
492/* br_stp.c */
493extern void br_log_state(const struct net_bridge_port *p);
494extern struct net_bridge_port *br_get_port(struct net_bridge *br,
495 u16 port_no);
496extern void br_init_port(struct net_bridge_port *p);
497extern void br_become_designated_port(struct net_bridge_port *p);
498
499extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
500extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
501extern int br_set_max_age(struct net_bridge *br, unsigned long x);
502
503
504/* br_stp_if.c */
505extern void br_stp_enable_bridge(struct net_bridge *br);
506extern void br_stp_disable_bridge(struct net_bridge *br);
507extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
508extern void br_stp_enable_port(struct net_bridge_port *p);
509extern void br_stp_disable_port(struct net_bridge_port *p);
510extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
511extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
512extern void br_stp_set_bridge_priority(struct net_bridge *br,
513 u16 newprio);
514extern int br_stp_set_port_priority(struct net_bridge_port *p,
515 unsigned long newprio);
516extern int br_stp_set_path_cost(struct net_bridge_port *p,
517 unsigned long path_cost);
518extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
519
520/* br_stp_bpdu.c */
521struct stp_proto;
522extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
523 struct net_device *dev);
524
525/* br_stp_timer.c */
526extern void br_stp_timer_init(struct net_bridge *br);
527extern void br_stp_port_timer_init(struct net_bridge_port *p);
528extern unsigned long br_timer_value(const struct timer_list *timer);
529
530/* br.c */
531#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
532extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
533#endif
534
535/* br_netlink.c */
536extern int br_netlink_init(void);
537extern void br_netlink_fini(void);
538extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
539
540#ifdef CONFIG_SYSFS
541/* br_sysfs_if.c */
542extern const struct sysfs_ops brport_sysfs_ops;
543extern int br_sysfs_addif(struct net_bridge_port *p);
544extern int br_sysfs_renameif(struct net_bridge_port *p);
545
546/* br_sysfs_br.c */
547extern int br_sysfs_addbr(struct net_device *dev);
548extern void br_sysfs_delbr(struct net_device *dev);
549
550#else
551
552#define br_sysfs_addif(p) (0)
553#define br_sysfs_renameif(p) (0)
554#define br_sysfs_addbr(dev) (0)
555#define br_sysfs_delbr(dev) do { } while(0)
556#endif /* CONFIG_SYSFS */
557
558#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
32#define BR_VERSION "2.3"
33
34/* Control of forwarding link local multicast */
35#define BR_GROUPFWD_DEFAULT 0
36/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
37enum {
38 BR_GROUPFWD_STP = BIT(0),
39 BR_GROUPFWD_MACPAUSE = BIT(1),
40 BR_GROUPFWD_LACP = BIT(2),
41};
42
43#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
44 BR_GROUPFWD_LACP)
45/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
46#define BR_GROUPFWD_8021AD 0xB801u
47
48/* Path to usermode spanning tree program */
49#define BR_STP_PROG "/sbin/bridge-stp"
50
51#define BR_FDB_NOTIFY_SETTABLE_BITS (FDB_NOTIFY_BIT | FDB_NOTIFY_INACTIVE_BIT)
52
53typedef struct bridge_id bridge_id;
54typedef struct mac_addr mac_addr;
55typedef __u16 port_id;
56
57struct bridge_id {
58 unsigned char prio[2];
59 unsigned char addr[ETH_ALEN];
60};
61
62struct mac_addr {
63 unsigned char addr[ETH_ALEN];
64};
65
66#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
67/* our own querier */
68struct bridge_mcast_own_query {
69 struct timer_list timer;
70 u32 startup_sent;
71};
72
73/* other querier */
74struct bridge_mcast_other_query {
75 struct timer_list timer;
76 unsigned long delay_time;
77};
78
79/* selected querier */
80struct bridge_mcast_querier {
81 struct br_ip addr;
82 struct net_bridge_port __rcu *port;
83};
84
85/* IGMP/MLD statistics */
86struct bridge_mcast_stats {
87 struct br_mcast_stats mstats;
88 struct u64_stats_sync syncp;
89};
90#endif
91
92struct br_tunnel_info {
93 __be64 tunnel_id;
94 struct metadata_dst __rcu *tunnel_dst;
95};
96
97/* private vlan flags */
98enum {
99 BR_VLFLAG_PER_PORT_STATS = BIT(0),
100 BR_VLFLAG_ADDED_BY_SWITCHDEV = BIT(1),
101};
102
103/**
104 * struct net_bridge_vlan - per-vlan entry
105 *
106 * @vnode: rhashtable member
107 * @vid: VLAN id
108 * @flags: bridge vlan flags
109 * @priv_flags: private (in-kernel) bridge vlan flags
110 * @state: STP state (e.g. blocking, learning, forwarding)
111 * @stats: per-cpu VLAN statistics
112 * @br: if MASTER flag set, this points to a bridge struct
113 * @port: if MASTER flag unset, this points to a port struct
114 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
115 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
116 * for this VLAN entry
117 * @vlist: sorted list of VLAN entries
118 * @rcu: used for entry destruction
119 *
120 * This structure is shared between the global per-VLAN entries contained in
121 * the bridge rhashtable and the local per-port per-VLAN entries contained in
122 * the port's rhashtable. The union entries should be interpreted depending on
123 * the entry flags that are set.
124 */
125struct net_bridge_vlan {
126 struct rhash_head vnode;
127 struct rhash_head tnode;
128 u16 vid;
129 u16 flags;
130 u16 priv_flags;
131 u8 state;
132 struct pcpu_sw_netstats __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 * @pvid_state: PVID's STP state (e.g. forwarding, learning, blocking)
157 *
158 * IMPORTANT: Be careful when checking if there're VLAN entries using list
159 * primitives because the bridge can have entries in its list which
160 * are just for global context but not for filtering, i.e. they have
161 * the master flag set but not the brentry flag. If you have to check
162 * if there're "real" entries in the bridge please test @num_vlans
163 */
164struct net_bridge_vlan_group {
165 struct rhashtable vlan_hash;
166 struct rhashtable tunnel_hash;
167 struct list_head vlan_list;
168 u16 num_vlans;
169 u16 pvid;
170 u8 pvid_state;
171};
172
173/* bridge fdb flags */
174enum {
175 BR_FDB_LOCAL,
176 BR_FDB_STATIC,
177 BR_FDB_STICKY,
178 BR_FDB_ADDED_BY_USER,
179 BR_FDB_ADDED_BY_EXT_LEARN,
180 BR_FDB_OFFLOADED,
181 BR_FDB_NOTIFY,
182 BR_FDB_NOTIFY_INACTIVE
183};
184
185struct net_bridge_fdb_key {
186 mac_addr addr;
187 u16 vlan_id;
188};
189
190struct net_bridge_fdb_entry {
191 struct rhash_head rhnode;
192 struct net_bridge_port *dst;
193
194 struct net_bridge_fdb_key key;
195 struct hlist_node fdb_node;
196 unsigned long flags;
197
198 /* write-heavy members should not affect lookups */
199 unsigned long updated ____cacheline_aligned_in_smp;
200 unsigned long used;
201
202 struct rcu_head rcu;
203};
204
205#define MDB_PG_FLAGS_PERMANENT BIT(0)
206#define MDB_PG_FLAGS_OFFLOAD BIT(1)
207#define MDB_PG_FLAGS_FAST_LEAVE BIT(2)
208#define MDB_PG_FLAGS_STAR_EXCL BIT(3)
209#define MDB_PG_FLAGS_BLOCKED BIT(4)
210
211#define PG_SRC_ENT_LIMIT 32
212
213#define BR_SGRP_F_DELETE BIT(0)
214#define BR_SGRP_F_SEND BIT(1)
215#define BR_SGRP_F_INSTALLED BIT(2)
216
217struct net_bridge_mcast_gc {
218 struct hlist_node gc_node;
219 void (*destroy)(struct net_bridge_mcast_gc *gc);
220};
221
222struct net_bridge_group_src {
223 struct hlist_node node;
224
225 struct br_ip addr;
226 struct net_bridge_port_group *pg;
227 u8 flags;
228 u8 src_query_rexmit_cnt;
229 struct timer_list timer;
230
231 struct net_bridge *br;
232 struct net_bridge_mcast_gc mcast_gc;
233 struct rcu_head rcu;
234};
235
236struct net_bridge_port_group_sg_key {
237 struct net_bridge_port *port;
238 struct br_ip addr;
239};
240
241struct net_bridge_port_group {
242 struct net_bridge_port_group __rcu *next;
243 struct net_bridge_port_group_sg_key key;
244 unsigned char eth_addr[ETH_ALEN] __aligned(2);
245 unsigned char flags;
246 unsigned char filter_mode;
247 unsigned char grp_query_rexmit_cnt;
248 unsigned char rt_protocol;
249
250 struct hlist_head src_list;
251 unsigned int src_ents;
252 struct timer_list timer;
253 struct timer_list rexmit_timer;
254 struct hlist_node mglist;
255 struct rb_root eht_set_tree;
256 struct rb_root eht_host_tree;
257
258 struct rhash_head rhnode;
259 struct net_bridge_mcast_gc mcast_gc;
260 struct rcu_head rcu;
261};
262
263struct net_bridge_mdb_entry {
264 struct rhash_head rhnode;
265 struct net_bridge *br;
266 struct net_bridge_port_group __rcu *ports;
267 struct br_ip addr;
268 bool host_joined;
269
270 struct timer_list timer;
271 struct hlist_node mdb_node;
272
273 struct net_bridge_mcast_gc mcast_gc;
274 struct rcu_head rcu;
275};
276
277struct net_bridge_port {
278 struct net_bridge *br;
279 struct net_device *dev;
280 struct list_head list;
281
282 unsigned long flags;
283#ifdef CONFIG_BRIDGE_VLAN_FILTERING
284 struct net_bridge_vlan_group __rcu *vlgrp;
285#endif
286 struct net_bridge_port __rcu *backup_port;
287
288 /* STP */
289 u8 priority;
290 u8 state;
291 u16 port_no;
292 unsigned char topology_change_ack;
293 unsigned char config_pending;
294 port_id port_id;
295 port_id designated_port;
296 bridge_id designated_root;
297 bridge_id designated_bridge;
298 u32 path_cost;
299 u32 designated_cost;
300 unsigned long designated_age;
301
302 struct timer_list forward_delay_timer;
303 struct timer_list hold_timer;
304 struct timer_list message_age_timer;
305 struct kobject kobj;
306 struct rcu_head rcu;
307
308#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
309 struct bridge_mcast_own_query ip4_own_query;
310 struct timer_list ip4_mc_router_timer;
311 struct hlist_node ip4_rlist;
312#if IS_ENABLED(CONFIG_IPV6)
313 struct bridge_mcast_own_query ip6_own_query;
314 struct timer_list ip6_mc_router_timer;
315 struct hlist_node ip6_rlist;
316#endif /* IS_ENABLED(CONFIG_IPV6) */
317 u32 multicast_eht_hosts_limit;
318 u32 multicast_eht_hosts_cnt;
319 unsigned char multicast_router;
320 struct bridge_mcast_stats __percpu *mcast_stats;
321 struct hlist_head mglist;
322#endif
323
324#ifdef CONFIG_SYSFS
325 char sysfs_name[IFNAMSIZ];
326#endif
327
328#ifdef CONFIG_NET_POLL_CONTROLLER
329 struct netpoll *np;
330#endif
331#ifdef CONFIG_NET_SWITCHDEV
332 int offload_fwd_mark;
333#endif
334 u16 group_fwd_mask;
335 u16 backup_redirected_cnt;
336
337 struct bridge_stp_xstats stp_xstats;
338};
339
340#define kobj_to_brport(obj) container_of(obj, struct net_bridge_port, kobj)
341
342#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
343#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
344
345static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
346{
347 return rcu_dereference(dev->rx_handler_data);
348}
349
350static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
351{
352 return netif_is_bridge_port(dev) ?
353 rtnl_dereference(dev->rx_handler_data) : NULL;
354}
355
356static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
357{
358 return netif_is_bridge_port(dev) ?
359 rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
360}
361
362enum net_bridge_opts {
363 BROPT_VLAN_ENABLED,
364 BROPT_VLAN_STATS_ENABLED,
365 BROPT_NF_CALL_IPTABLES,
366 BROPT_NF_CALL_IP6TABLES,
367 BROPT_NF_CALL_ARPTABLES,
368 BROPT_GROUP_ADDR_SET,
369 BROPT_MULTICAST_ENABLED,
370 BROPT_MULTICAST_QUERIER,
371 BROPT_MULTICAST_QUERY_USE_IFADDR,
372 BROPT_MULTICAST_STATS_ENABLED,
373 BROPT_HAS_IPV6_ADDR,
374 BROPT_NEIGH_SUPPRESS_ENABLED,
375 BROPT_MTU_SET_BY_USER,
376 BROPT_VLAN_STATS_PER_PORT,
377 BROPT_NO_LL_LEARN,
378 BROPT_VLAN_BRIDGE_BINDING,
379};
380
381struct net_bridge {
382 spinlock_t lock;
383 spinlock_t hash_lock;
384 struct hlist_head frame_type_list;
385 struct net_device *dev;
386 unsigned long options;
387 /* These fields are accessed on each packet */
388#ifdef CONFIG_BRIDGE_VLAN_FILTERING
389 __be16 vlan_proto;
390 u16 default_pvid;
391 struct net_bridge_vlan_group __rcu *vlgrp;
392#endif
393
394 struct rhashtable fdb_hash_tbl;
395 struct list_head port_list;
396#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
397 union {
398 struct rtable fake_rtable;
399 struct rt6_info fake_rt6_info;
400 };
401#endif
402 u16 group_fwd_mask;
403 u16 group_fwd_mask_required;
404
405 /* STP */
406 bridge_id designated_root;
407 bridge_id bridge_id;
408 unsigned char topology_change;
409 unsigned char topology_change_detected;
410 u16 root_port;
411 unsigned long max_age;
412 unsigned long hello_time;
413 unsigned long forward_delay;
414 unsigned long ageing_time;
415 unsigned long bridge_max_age;
416 unsigned long bridge_hello_time;
417 unsigned long bridge_forward_delay;
418 unsigned long bridge_ageing_time;
419 u32 root_path_cost;
420
421 u8 group_addr[ETH_ALEN];
422
423 enum {
424 BR_NO_STP, /* no spanning tree */
425 BR_KERNEL_STP, /* old STP in kernel */
426 BR_USER_STP, /* new RSTP in userspace */
427 } stp_enabled;
428
429#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
430
431 u32 hash_max;
432
433 u32 multicast_last_member_count;
434 u32 multicast_startup_query_count;
435
436 u8 multicast_igmp_version;
437 u8 multicast_router;
438#if IS_ENABLED(CONFIG_IPV6)
439 u8 multicast_mld_version;
440#endif
441 spinlock_t multicast_lock;
442 unsigned long multicast_last_member_interval;
443 unsigned long multicast_membership_interval;
444 unsigned long multicast_querier_interval;
445 unsigned long multicast_query_interval;
446 unsigned long multicast_query_response_interval;
447 unsigned long multicast_startup_query_interval;
448
449 struct rhashtable mdb_hash_tbl;
450 struct rhashtable sg_port_tbl;
451
452 struct hlist_head mcast_gc_list;
453 struct hlist_head mdb_list;
454
455 struct hlist_head ip4_mc_router_list;
456 struct timer_list ip4_mc_router_timer;
457 struct bridge_mcast_other_query ip4_other_query;
458 struct bridge_mcast_own_query ip4_own_query;
459 struct bridge_mcast_querier ip4_querier;
460 struct bridge_mcast_stats __percpu *mcast_stats;
461#if IS_ENABLED(CONFIG_IPV6)
462 struct hlist_head ip6_mc_router_list;
463 struct timer_list ip6_mc_router_timer;
464 struct bridge_mcast_other_query ip6_other_query;
465 struct bridge_mcast_own_query ip6_own_query;
466 struct bridge_mcast_querier ip6_querier;
467#endif /* IS_ENABLED(CONFIG_IPV6) */
468 struct work_struct mcast_gc_work;
469#endif
470
471 struct timer_list hello_timer;
472 struct timer_list tcn_timer;
473 struct timer_list topology_change_timer;
474 struct delayed_work gc_work;
475 struct kobject *ifobj;
476 u32 auto_cnt;
477
478#ifdef CONFIG_NET_SWITCHDEV
479 int offload_fwd_mark;
480#endif
481 struct hlist_head fdb_list;
482
483#if IS_ENABLED(CONFIG_BRIDGE_MRP)
484 struct hlist_head mrp_list;
485#endif
486#if IS_ENABLED(CONFIG_BRIDGE_CFM)
487 struct hlist_head mep_list;
488#endif
489};
490
491struct br_input_skb_cb {
492 struct net_device *brdev;
493
494 u16 frag_max_size;
495#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
496 u8 igmp;
497 u8 mrouters_only:1;
498#endif
499 u8 proxyarp_replied:1;
500 u8 src_port_isolated:1;
501#ifdef CONFIG_BRIDGE_VLAN_FILTERING
502 u8 vlan_filtered:1;
503#endif
504#ifdef CONFIG_NETFILTER_FAMILY_BRIDGE
505 u8 br_netfilter_broute:1;
506#endif
507
508#ifdef CONFIG_NET_SWITCHDEV
509 int offload_fwd_mark;
510#endif
511};
512
513#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
514
515#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
516# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
517#else
518# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
519#endif
520
521#define br_printk(level, br, format, args...) \
522 printk(level "%s: " format, (br)->dev->name, ##args)
523
524#define br_err(__br, format, args...) \
525 br_printk(KERN_ERR, __br, format, ##args)
526#define br_warn(__br, format, args...) \
527 br_printk(KERN_WARNING, __br, format, ##args)
528#define br_notice(__br, format, args...) \
529 br_printk(KERN_NOTICE, __br, format, ##args)
530#define br_info(__br, format, args...) \
531 br_printk(KERN_INFO, __br, format, ##args)
532
533#define br_debug(br, format, args...) \
534 pr_debug("%s: " format, (br)->dev->name, ##args)
535
536/* called under bridge lock */
537static inline int br_is_root_bridge(const struct net_bridge *br)
538{
539 return !memcmp(&br->bridge_id, &br->designated_root, 8);
540}
541
542/* check if a VLAN entry is global */
543static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
544{
545 return v->flags & BRIDGE_VLAN_INFO_MASTER;
546}
547
548/* check if a VLAN entry is used by the bridge */
549static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
550{
551 return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
552}
553
554/* check if we should use the vlan entry, returns false if it's only context */
555static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
556{
557 if (br_vlan_is_master(v)) {
558 if (br_vlan_is_brentry(v))
559 return true;
560 else
561 return false;
562 }
563
564 return true;
565}
566
567static inline bool nbp_state_should_learn(const struct net_bridge_port *p)
568{
569 return p->state == BR_STATE_LEARNING || p->state == BR_STATE_FORWARDING;
570}
571
572static inline bool br_vlan_valid_id(u16 vid, struct netlink_ext_ack *extack)
573{
574 bool ret = vid > 0 && vid < VLAN_VID_MASK;
575
576 if (!ret)
577 NL_SET_ERR_MSG_MOD(extack, "Vlan id is invalid");
578
579 return ret;
580}
581
582static inline bool br_vlan_valid_range(const struct bridge_vlan_info *cur,
583 const struct bridge_vlan_info *last,
584 struct netlink_ext_ack *extack)
585{
586 /* pvid flag is not allowed in ranges */
587 if (cur->flags & BRIDGE_VLAN_INFO_PVID) {
588 NL_SET_ERR_MSG_MOD(extack, "Pvid isn't allowed in a range");
589 return false;
590 }
591
592 /* when cur is the range end, check if:
593 * - it has range start flag
594 * - range ids are invalid (end is equal to or before start)
595 */
596 if (last) {
597 if (cur->flags & BRIDGE_VLAN_INFO_RANGE_BEGIN) {
598 NL_SET_ERR_MSG_MOD(extack, "Found a new vlan range start while processing one");
599 return false;
600 } else if (!(cur->flags & BRIDGE_VLAN_INFO_RANGE_END)) {
601 NL_SET_ERR_MSG_MOD(extack, "Vlan range end flag is missing");
602 return false;
603 } else if (cur->vid <= last->vid) {
604 NL_SET_ERR_MSG_MOD(extack, "End vlan id is less than or equal to start vlan id");
605 return false;
606 }
607 }
608
609 /* check for required range flags */
610 if (!(cur->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN |
611 BRIDGE_VLAN_INFO_RANGE_END))) {
612 NL_SET_ERR_MSG_MOD(extack, "Both vlan range flags are missing");
613 return false;
614 }
615
616 return true;
617}
618
619static inline int br_afspec_cmd_to_rtm(int cmd)
620{
621 switch (cmd) {
622 case RTM_SETLINK:
623 return RTM_NEWVLAN;
624 case RTM_DELLINK:
625 return RTM_DELVLAN;
626 }
627
628 return 0;
629}
630
631static inline int br_opt_get(const struct net_bridge *br,
632 enum net_bridge_opts opt)
633{
634 return test_bit(opt, &br->options);
635}
636
637int br_boolopt_toggle(struct net_bridge *br, enum br_boolopt_id opt, bool on,
638 struct netlink_ext_ack *extack);
639int br_boolopt_get(const struct net_bridge *br, enum br_boolopt_id opt);
640int br_boolopt_multi_toggle(struct net_bridge *br,
641 struct br_boolopt_multi *bm,
642 struct netlink_ext_ack *extack);
643void br_boolopt_multi_get(const struct net_bridge *br,
644 struct br_boolopt_multi *bm);
645void br_opt_toggle(struct net_bridge *br, enum net_bridge_opts opt, bool on);
646
647/* br_device.c */
648void br_dev_setup(struct net_device *dev);
649void br_dev_delete(struct net_device *dev, struct list_head *list);
650netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
651#ifdef CONFIG_NET_POLL_CONTROLLER
652static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
653 struct sk_buff *skb)
654{
655 netpoll_send_skb(p->np, skb);
656}
657
658int br_netpoll_enable(struct net_bridge_port *p);
659void br_netpoll_disable(struct net_bridge_port *p);
660#else
661static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
662 struct sk_buff *skb)
663{
664}
665
666static inline int br_netpoll_enable(struct net_bridge_port *p)
667{
668 return 0;
669}
670
671static inline void br_netpoll_disable(struct net_bridge_port *p)
672{
673}
674#endif
675
676/* br_fdb.c */
677int br_fdb_init(void);
678void br_fdb_fini(void);
679int br_fdb_hash_init(struct net_bridge *br);
680void br_fdb_hash_fini(struct net_bridge *br);
681void br_fdb_flush(struct net_bridge *br);
682void br_fdb_find_delete_local(struct net_bridge *br,
683 const struct net_bridge_port *p,
684 const unsigned char *addr, u16 vid);
685void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
686void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
687void br_fdb_cleanup(struct work_struct *work);
688void br_fdb_delete_by_port(struct net_bridge *br,
689 const struct net_bridge_port *p, u16 vid, int do_all);
690struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
691 const unsigned char *addr,
692 __u16 vid);
693int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
694int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
695 unsigned long off);
696int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
697 const unsigned char *addr, u16 vid);
698void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
699 const unsigned char *addr, u16 vid, unsigned long flags);
700
701int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
702 struct net_device *dev, const unsigned char *addr, u16 vid);
703int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
704 const unsigned char *addr, u16 vid, u16 nlh_flags,
705 struct netlink_ext_ack *extack);
706int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
707 struct net_device *dev, struct net_device *fdev, int *idx);
708int br_fdb_get(struct sk_buff *skb, struct nlattr *tb[], struct net_device *dev,
709 const unsigned char *addr, u16 vid, u32 portid, u32 seq,
710 struct netlink_ext_ack *extack);
711int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
712void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
713int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
714 const unsigned char *addr, u16 vid,
715 bool swdev_notify);
716int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
717 const unsigned char *addr, u16 vid,
718 bool swdev_notify);
719void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
720 const unsigned char *addr, u16 vid, bool offloaded);
721
722/* br_forward.c */
723enum br_pkt_type {
724 BR_PKT_UNICAST,
725 BR_PKT_MULTICAST,
726 BR_PKT_BROADCAST
727};
728int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
729void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
730 bool local_rcv, bool local_orig);
731int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
732void br_flood(struct net_bridge *br, struct sk_buff *skb,
733 enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
734
735/* return true if both source port and dest port are isolated */
736static inline bool br_skb_isolated(const struct net_bridge_port *to,
737 const struct sk_buff *skb)
738{
739 return BR_INPUT_SKB_CB(skb)->src_port_isolated &&
740 (to->flags & BR_ISOLATED);
741}
742
743/* br_if.c */
744void br_port_carrier_check(struct net_bridge_port *p, bool *notified);
745int br_add_bridge(struct net *net, const char *name);
746int br_del_bridge(struct net *net, const char *name);
747int br_add_if(struct net_bridge *br, struct net_device *dev,
748 struct netlink_ext_ack *extack);
749int br_del_if(struct net_bridge *br, struct net_device *dev);
750void br_mtu_auto_adjust(struct net_bridge *br);
751netdev_features_t br_features_recompute(struct net_bridge *br,
752 netdev_features_t features);
753void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
754void br_manage_promisc(struct net_bridge *br);
755int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev);
756
757/* br_input.c */
758int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
759rx_handler_func_t *br_get_rx_handler(const struct net_device *dev);
760
761struct br_frame_type {
762 __be16 type;
763 int (*frame_handler)(struct net_bridge_port *port,
764 struct sk_buff *skb);
765 struct hlist_node list;
766};
767
768void br_add_frame(struct net_bridge *br, struct br_frame_type *ft);
769void br_del_frame(struct net_bridge *br, struct br_frame_type *ft);
770
771static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
772{
773 return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev);
774}
775
776static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
777{
778 return rcu_dereference_rtnl(dev->rx_handler) == br_get_rx_handler(dev);
779}
780
781static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
782{
783 return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
784}
785
786static inline struct net_bridge_port *
787br_port_get_check_rtnl(const struct net_device *dev)
788{
789 return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
790}
791
792/* br_ioctl.c */
793int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
794int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
795 void __user *arg);
796
797/* br_multicast.c */
798#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
799int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
800 struct sk_buff *skb, u16 vid);
801struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
802 struct sk_buff *skb, u16 vid);
803int br_multicast_add_port(struct net_bridge_port *port);
804void br_multicast_del_port(struct net_bridge_port *port);
805void br_multicast_enable_port(struct net_bridge_port *port);
806void br_multicast_disable_port(struct net_bridge_port *port);
807void br_multicast_init(struct net_bridge *br);
808void br_multicast_join_snoopers(struct net_bridge *br);
809void br_multicast_leave_snoopers(struct net_bridge *br);
810void br_multicast_open(struct net_bridge *br);
811void br_multicast_stop(struct net_bridge *br);
812void br_multicast_dev_del(struct net_bridge *br);
813void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
814 struct sk_buff *skb, bool local_rcv, bool local_orig);
815int br_multicast_set_router(struct net_bridge *br, unsigned long val);
816int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
817int br_multicast_toggle(struct net_bridge *br, unsigned long val,
818 struct netlink_ext_ack *extack);
819int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
820int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
821int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
822#if IS_ENABLED(CONFIG_IPV6)
823int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
824#endif
825struct net_bridge_mdb_entry *
826br_mdb_ip_get(struct net_bridge *br, struct br_ip *dst);
827struct net_bridge_mdb_entry *
828br_multicast_new_group(struct net_bridge *br, struct br_ip *group);
829struct net_bridge_port_group *
830br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
831 struct net_bridge_port_group __rcu *next,
832 unsigned char flags, const unsigned char *src,
833 u8 filter_mode, u8 rt_protocol);
834int br_mdb_hash_init(struct net_bridge *br);
835void br_mdb_hash_fini(struct net_bridge *br);
836void br_mdb_notify(struct net_device *dev, struct net_bridge_mdb_entry *mp,
837 struct net_bridge_port_group *pg, int type);
838void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
839 int type);
840void br_multicast_del_pg(struct net_bridge_mdb_entry *mp,
841 struct net_bridge_port_group *pg,
842 struct net_bridge_port_group __rcu **pp);
843void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
844 const struct sk_buff *skb, u8 type, u8 dir);
845int br_multicast_init_stats(struct net_bridge *br);
846void br_multicast_uninit_stats(struct net_bridge *br);
847void br_multicast_get_stats(const struct net_bridge *br,
848 const struct net_bridge_port *p,
849 struct br_mcast_stats *dest);
850void br_mdb_init(void);
851void br_mdb_uninit(void);
852void br_multicast_host_join(struct net_bridge_mdb_entry *mp, bool notify);
853void br_multicast_host_leave(struct net_bridge_mdb_entry *mp, bool notify);
854void br_multicast_star_g_handle_mode(struct net_bridge_port_group *pg,
855 u8 filter_mode);
856void br_multicast_sg_add_exclude_ports(struct net_bridge_mdb_entry *star_mp,
857 struct net_bridge_port_group *sg);
858struct net_bridge_group_src *
859br_multicast_find_group_src(struct net_bridge_port_group *pg, struct br_ip *ip);
860void br_multicast_del_group_src(struct net_bridge_group_src *src,
861 bool fastleave);
862
863static inline bool br_group_is_l2(const struct br_ip *group)
864{
865 return group->proto == 0;
866}
867
868#define mlock_dereference(X, br) \
869 rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))
870
871static inline struct hlist_node *
872br_multicast_get_first_rport_node(struct net_bridge *b, struct sk_buff *skb) {
873#if IS_ENABLED(CONFIG_IPV6)
874 if (skb->protocol == htons(ETH_P_IPV6))
875 return rcu_dereference(hlist_first_rcu(&b->ip6_mc_router_list));
876#endif
877 return rcu_dereference(hlist_first_rcu(&b->ip4_mc_router_list));
878}
879
880static inline struct net_bridge_port *
881br_multicast_rport_from_node_skb(struct hlist_node *rp, struct sk_buff *skb) {
882#if IS_ENABLED(CONFIG_IPV6)
883 if (skb->protocol == htons(ETH_P_IPV6))
884 return hlist_entry_safe(rp, struct net_bridge_port, ip6_rlist);
885#endif
886 return hlist_entry_safe(rp, struct net_bridge_port, ip4_rlist);
887}
888
889static inline bool br_ip4_multicast_is_router(struct net_bridge *br)
890{
891 return timer_pending(&br->ip4_mc_router_timer);
892}
893
894static inline bool br_ip6_multicast_is_router(struct net_bridge *br)
895{
896#if IS_ENABLED(CONFIG_IPV6)
897 return timer_pending(&br->ip6_mc_router_timer);
898#else
899 return false;
900#endif
901}
902
903static inline bool
904br_multicast_is_router(struct net_bridge *br, struct sk_buff *skb)
905{
906 switch (br->multicast_router) {
907 case MDB_RTR_TYPE_PERM:
908 return true;
909 case MDB_RTR_TYPE_TEMP_QUERY:
910 if (skb) {
911 if (skb->protocol == htons(ETH_P_IP))
912 return br_ip4_multicast_is_router(br);
913 else if (skb->protocol == htons(ETH_P_IPV6))
914 return br_ip6_multicast_is_router(br);
915 } else {
916 return br_ip4_multicast_is_router(br) ||
917 br_ip6_multicast_is_router(br);
918 }
919 fallthrough;
920 default:
921 return false;
922 }
923}
924
925static inline bool
926__br_multicast_querier_exists(struct net_bridge *br,
927 struct bridge_mcast_other_query *querier,
928 const bool is_ipv6)
929{
930 bool own_querier_enabled;
931
932 if (br_opt_get(br, BROPT_MULTICAST_QUERIER)) {
933 if (is_ipv6 && !br_opt_get(br, BROPT_HAS_IPV6_ADDR))
934 own_querier_enabled = false;
935 else
936 own_querier_enabled = true;
937 } else {
938 own_querier_enabled = false;
939 }
940
941 return time_is_before_jiffies(querier->delay_time) &&
942 (own_querier_enabled || timer_pending(&querier->timer));
943}
944
945static inline bool br_multicast_querier_exists(struct net_bridge *br,
946 struct ethhdr *eth,
947 const struct net_bridge_mdb_entry *mdb)
948{
949 switch (eth->h_proto) {
950 case (htons(ETH_P_IP)):
951 return __br_multicast_querier_exists(br,
952 &br->ip4_other_query, false);
953#if IS_ENABLED(CONFIG_IPV6)
954 case (htons(ETH_P_IPV6)):
955 return __br_multicast_querier_exists(br,
956 &br->ip6_other_query, true);
957#endif
958 default:
959 return !!mdb && br_group_is_l2(&mdb->addr);
960 }
961}
962
963static inline bool br_multicast_is_star_g(const struct br_ip *ip)
964{
965 switch (ip->proto) {
966 case htons(ETH_P_IP):
967 return ipv4_is_zeronet(ip->src.ip4);
968#if IS_ENABLED(CONFIG_IPV6)
969 case htons(ETH_P_IPV6):
970 return ipv6_addr_any(&ip->src.ip6);
971#endif
972 default:
973 return false;
974 }
975}
976
977static inline bool br_multicast_should_handle_mode(const struct net_bridge *br,
978 __be16 proto)
979{
980 switch (proto) {
981 case htons(ETH_P_IP):
982 return !!(br->multicast_igmp_version == 3);
983#if IS_ENABLED(CONFIG_IPV6)
984 case htons(ETH_P_IPV6):
985 return !!(br->multicast_mld_version == 2);
986#endif
987 default:
988 return false;
989 }
990}
991
992static inline int br_multicast_igmp_type(const struct sk_buff *skb)
993{
994 return BR_INPUT_SKB_CB(skb)->igmp;
995}
996
997static inline unsigned long br_multicast_lmqt(const struct net_bridge *br)
998{
999 return br->multicast_last_member_interval *
1000 br->multicast_last_member_count;
1001}
1002
1003static inline unsigned long br_multicast_gmi(const struct net_bridge *br)
1004{
1005 return br->multicast_membership_interval;
1006}
1007#else
1008static inline int br_multicast_rcv(struct net_bridge *br,
1009 struct net_bridge_port *port,
1010 struct sk_buff *skb,
1011 u16 vid)
1012{
1013 return 0;
1014}
1015
1016static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
1017 struct sk_buff *skb, u16 vid)
1018{
1019 return NULL;
1020}
1021
1022static inline int br_multicast_add_port(struct net_bridge_port *port)
1023{
1024 return 0;
1025}
1026
1027static inline void br_multicast_del_port(struct net_bridge_port *port)
1028{
1029}
1030
1031static inline void br_multicast_enable_port(struct net_bridge_port *port)
1032{
1033}
1034
1035static inline void br_multicast_disable_port(struct net_bridge_port *port)
1036{
1037}
1038
1039static inline void br_multicast_init(struct net_bridge *br)
1040{
1041}
1042
1043static inline void br_multicast_join_snoopers(struct net_bridge *br)
1044{
1045}
1046
1047static inline void br_multicast_leave_snoopers(struct net_bridge *br)
1048{
1049}
1050
1051static inline void br_multicast_open(struct net_bridge *br)
1052{
1053}
1054
1055static inline void br_multicast_stop(struct net_bridge *br)
1056{
1057}
1058
1059static inline void br_multicast_dev_del(struct net_bridge *br)
1060{
1061}
1062
1063static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
1064 struct sk_buff *skb,
1065 bool local_rcv, bool local_orig)
1066{
1067}
1068
1069static inline bool br_multicast_is_router(struct net_bridge *br,
1070 struct sk_buff *skb)
1071{
1072 return false;
1073}
1074
1075static inline bool br_multicast_querier_exists(struct net_bridge *br,
1076 struct ethhdr *eth,
1077 const struct net_bridge_mdb_entry *mdb)
1078{
1079 return false;
1080}
1081
1082static inline void br_mdb_init(void)
1083{
1084}
1085
1086static inline void br_mdb_uninit(void)
1087{
1088}
1089
1090static inline int br_mdb_hash_init(struct net_bridge *br)
1091{
1092 return 0;
1093}
1094
1095static inline void br_mdb_hash_fini(struct net_bridge *br)
1096{
1097}
1098
1099static inline void br_multicast_count(struct net_bridge *br,
1100 const struct net_bridge_port *p,
1101 const struct sk_buff *skb,
1102 u8 type, u8 dir)
1103{
1104}
1105
1106static inline int br_multicast_init_stats(struct net_bridge *br)
1107{
1108 return 0;
1109}
1110
1111static inline void br_multicast_uninit_stats(struct net_bridge *br)
1112{
1113}
1114
1115static inline int br_multicast_igmp_type(const struct sk_buff *skb)
1116{
1117 return 0;
1118}
1119#endif
1120
1121/* br_vlan.c */
1122#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1123bool br_allowed_ingress(const struct net_bridge *br,
1124 struct net_bridge_vlan_group *vg, struct sk_buff *skb,
1125 u16 *vid, u8 *state);
1126bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1127 const struct sk_buff *skb);
1128bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
1129struct sk_buff *br_handle_vlan(struct net_bridge *br,
1130 const struct net_bridge_port *port,
1131 struct net_bridge_vlan_group *vg,
1132 struct sk_buff *skb);
1133int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1134 bool *changed, struct netlink_ext_ack *extack);
1135int br_vlan_delete(struct net_bridge *br, u16 vid);
1136void br_vlan_flush(struct net_bridge *br);
1137struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
1138void br_recalculate_fwd_mask(struct net_bridge *br);
1139int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val,
1140 struct netlink_ext_ack *extack);
1141int __br_vlan_set_proto(struct net_bridge *br, __be16 proto,
1142 struct netlink_ext_ack *extack);
1143int br_vlan_set_proto(struct net_bridge *br, unsigned long val,
1144 struct netlink_ext_ack *extack);
1145int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
1146int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val);
1147int br_vlan_init(struct net_bridge *br);
1148int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val,
1149 struct netlink_ext_ack *extack);
1150int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid,
1151 struct netlink_ext_ack *extack);
1152int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1153 bool *changed, struct netlink_ext_ack *extack);
1154int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
1155void nbp_vlan_flush(struct net_bridge_port *port);
1156int nbp_vlan_init(struct net_bridge_port *port, struct netlink_ext_ack *extack);
1157int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
1158void br_vlan_get_stats(const struct net_bridge_vlan *v,
1159 struct pcpu_sw_netstats *stats);
1160void br_vlan_port_event(struct net_bridge_port *p, unsigned long event);
1161int br_vlan_bridge_event(struct net_device *dev, unsigned long event,
1162 void *ptr);
1163void br_vlan_rtnl_init(void);
1164void br_vlan_rtnl_uninit(void);
1165void br_vlan_notify(const struct net_bridge *br,
1166 const struct net_bridge_port *p,
1167 u16 vid, u16 vid_range,
1168 int cmd);
1169bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1170 const struct net_bridge_vlan *range_end);
1171
1172void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1173 struct net_device_path_ctx *ctx,
1174 struct net_device_path *path);
1175int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1176 struct net_bridge_port *dst,
1177 struct net_device_path *path);
1178
1179static inline struct net_bridge_vlan_group *br_vlan_group(
1180 const struct net_bridge *br)
1181{
1182 return rtnl_dereference(br->vlgrp);
1183}
1184
1185static inline struct net_bridge_vlan_group *nbp_vlan_group(
1186 const struct net_bridge_port *p)
1187{
1188 return rtnl_dereference(p->vlgrp);
1189}
1190
1191static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1192 const struct net_bridge *br)
1193{
1194 return rcu_dereference(br->vlgrp);
1195}
1196
1197static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1198 const struct net_bridge_port *p)
1199{
1200 return rcu_dereference(p->vlgrp);
1201}
1202
1203/* Since bridge now depends on 8021Q module, but the time bridge sees the
1204 * skb, the vlan tag will always be present if the frame was tagged.
1205 */
1206static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
1207{
1208 int err = 0;
1209
1210 if (skb_vlan_tag_present(skb)) {
1211 *vid = skb_vlan_tag_get_id(skb);
1212 } else {
1213 *vid = 0;
1214 err = -EINVAL;
1215 }
1216
1217 return err;
1218}
1219
1220static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1221{
1222 if (!vg)
1223 return 0;
1224
1225 smp_rmb();
1226 return vg->pvid;
1227}
1228
1229static inline u16 br_vlan_flags(const struct net_bridge_vlan *v, u16 pvid)
1230{
1231 return v->vid == pvid ? v->flags | BRIDGE_VLAN_INFO_PVID : v->flags;
1232}
1233#else
1234static inline bool br_allowed_ingress(const struct net_bridge *br,
1235 struct net_bridge_vlan_group *vg,
1236 struct sk_buff *skb,
1237 u16 *vid, u8 *state)
1238{
1239 return true;
1240}
1241
1242static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
1243 const struct sk_buff *skb)
1244{
1245 return true;
1246}
1247
1248static inline bool br_should_learn(struct net_bridge_port *p,
1249 struct sk_buff *skb, u16 *vid)
1250{
1251 return true;
1252}
1253
1254static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
1255 const struct net_bridge_port *port,
1256 struct net_bridge_vlan_group *vg,
1257 struct sk_buff *skb)
1258{
1259 return skb;
1260}
1261
1262static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
1263 bool *changed, struct netlink_ext_ack *extack)
1264{
1265 *changed = false;
1266 return -EOPNOTSUPP;
1267}
1268
1269static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
1270{
1271 return -EOPNOTSUPP;
1272}
1273
1274static inline void br_vlan_flush(struct net_bridge *br)
1275{
1276}
1277
1278static inline void br_recalculate_fwd_mask(struct net_bridge *br)
1279{
1280}
1281
1282static inline int br_vlan_init(struct net_bridge *br)
1283{
1284 return 0;
1285}
1286
1287static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
1288 bool *changed, struct netlink_ext_ack *extack)
1289{
1290 *changed = false;
1291 return -EOPNOTSUPP;
1292}
1293
1294static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
1295{
1296 return -EOPNOTSUPP;
1297}
1298
1299static inline void nbp_vlan_flush(struct net_bridge_port *port)
1300{
1301}
1302
1303static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
1304 u16 vid)
1305{
1306 return NULL;
1307}
1308
1309static inline int nbp_vlan_init(struct net_bridge_port *port,
1310 struct netlink_ext_ack *extack)
1311{
1312 return 0;
1313}
1314
1315static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
1316{
1317 return 0;
1318}
1319
1320static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
1321{
1322 return 0;
1323}
1324
1325static inline int br_vlan_filter_toggle(struct net_bridge *br,
1326 unsigned long val,
1327 struct netlink_ext_ack *extack)
1328{
1329 return -EOPNOTSUPP;
1330}
1331
1332static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
1333 u32 filter_mask)
1334{
1335 return 0;
1336}
1337
1338static inline void br_vlan_fill_forward_path_pvid(struct net_bridge *br,
1339 struct net_device_path_ctx *ctx,
1340 struct net_device_path *path)
1341{
1342}
1343
1344static inline int br_vlan_fill_forward_path_mode(struct net_bridge *br,
1345 struct net_bridge_port *dst,
1346 struct net_device_path *path)
1347{
1348 return 0;
1349}
1350
1351static inline struct net_bridge_vlan_group *br_vlan_group(
1352 const struct net_bridge *br)
1353{
1354 return NULL;
1355}
1356
1357static inline struct net_bridge_vlan_group *nbp_vlan_group(
1358 const struct net_bridge_port *p)
1359{
1360 return NULL;
1361}
1362
1363static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
1364 const struct net_bridge *br)
1365{
1366 return NULL;
1367}
1368
1369static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
1370 const struct net_bridge_port *p)
1371{
1372 return NULL;
1373}
1374
1375static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
1376 struct pcpu_sw_netstats *stats)
1377{
1378}
1379
1380static inline void br_vlan_port_event(struct net_bridge_port *p,
1381 unsigned long event)
1382{
1383}
1384
1385static inline int br_vlan_bridge_event(struct net_device *dev,
1386 unsigned long event, void *ptr)
1387{
1388 return 0;
1389}
1390
1391static inline void br_vlan_rtnl_init(void)
1392{
1393}
1394
1395static inline void br_vlan_rtnl_uninit(void)
1396{
1397}
1398
1399static inline void br_vlan_notify(const struct net_bridge *br,
1400 const struct net_bridge_port *p,
1401 u16 vid, u16 vid_range,
1402 int cmd)
1403{
1404}
1405
1406static inline bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr,
1407 const struct net_bridge_vlan *range_end)
1408{
1409 return true;
1410}
1411#endif
1412
1413/* br_vlan_options.c */
1414#ifdef CONFIG_BRIDGE_VLAN_FILTERING
1415bool br_vlan_opts_eq_range(const struct net_bridge_vlan *v_curr,
1416 const struct net_bridge_vlan *range_end);
1417bool br_vlan_opts_fill(struct sk_buff *skb, const struct net_bridge_vlan *v);
1418size_t br_vlan_opts_nl_size(void);
1419int br_vlan_process_options(const struct net_bridge *br,
1420 const struct net_bridge_port *p,
1421 struct net_bridge_vlan *range_start,
1422 struct net_bridge_vlan *range_end,
1423 struct nlattr **tb,
1424 struct netlink_ext_ack *extack);
1425
1426/* vlan state manipulation helpers using *_ONCE to annotate lock-free access */
1427static inline u8 br_vlan_get_state(const struct net_bridge_vlan *v)
1428{
1429 return READ_ONCE(v->state);
1430}
1431
1432static inline void br_vlan_set_state(struct net_bridge_vlan *v, u8 state)
1433{
1434 WRITE_ONCE(v->state, state);
1435}
1436
1437static inline u8 br_vlan_get_pvid_state(const struct net_bridge_vlan_group *vg)
1438{
1439 return READ_ONCE(vg->pvid_state);
1440}
1441
1442static inline void br_vlan_set_pvid_state(struct net_bridge_vlan_group *vg,
1443 u8 state)
1444{
1445 WRITE_ONCE(vg->pvid_state, state);
1446}
1447
1448/* learn_allow is true at ingress and false at egress */
1449static inline bool br_vlan_state_allowed(u8 state, bool learn_allow)
1450{
1451 switch (state) {
1452 case BR_STATE_LEARNING:
1453 return learn_allow;
1454 case BR_STATE_FORWARDING:
1455 return true;
1456 default:
1457 return false;
1458 }
1459}
1460#endif
1461
1462struct nf_br_ops {
1463 int (*br_dev_xmit_hook)(struct sk_buff *skb);
1464};
1465extern const struct nf_br_ops __rcu *nf_br_ops;
1466
1467/* br_netfilter.c */
1468#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
1469int br_nf_core_init(void);
1470void br_nf_core_fini(void);
1471void br_netfilter_rtable_init(struct net_bridge *);
1472#else
1473static inline int br_nf_core_init(void) { return 0; }
1474static inline void br_nf_core_fini(void) {}
1475#define br_netfilter_rtable_init(x)
1476#endif
1477
1478/* br_stp.c */
1479void br_set_state(struct net_bridge_port *p, unsigned int state);
1480struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
1481void br_init_port(struct net_bridge_port *p);
1482void br_become_designated_port(struct net_bridge_port *p);
1483
1484void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
1485int br_set_forward_delay(struct net_bridge *br, unsigned long x);
1486int br_set_hello_time(struct net_bridge *br, unsigned long x);
1487int br_set_max_age(struct net_bridge *br, unsigned long x);
1488int __set_ageing_time(struct net_device *dev, unsigned long t);
1489int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1490
1491
1492/* br_stp_if.c */
1493void br_stp_enable_bridge(struct net_bridge *br);
1494void br_stp_disable_bridge(struct net_bridge *br);
1495int br_stp_set_enabled(struct net_bridge *br, unsigned long val,
1496 struct netlink_ext_ack *extack);
1497void br_stp_enable_port(struct net_bridge_port *p);
1498void br_stp_disable_port(struct net_bridge_port *p);
1499bool br_stp_recalculate_bridge_id(struct net_bridge *br);
1500void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1501void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
1502int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
1503int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
1504ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
1505
1506/* br_stp_bpdu.c */
1507struct stp_proto;
1508void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
1509 struct net_device *dev);
1510
1511/* br_stp_timer.c */
1512void br_stp_timer_init(struct net_bridge *br);
1513void br_stp_port_timer_init(struct net_bridge_port *p);
1514unsigned long br_timer_value(const struct timer_list *timer);
1515
1516/* br.c */
1517#if IS_ENABLED(CONFIG_ATM_LANE)
1518extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
1519#endif
1520
1521/* br_mrp.c */
1522#if IS_ENABLED(CONFIG_BRIDGE_MRP)
1523int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1524 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1525bool br_mrp_enabled(struct net_bridge *br);
1526void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p);
1527int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br);
1528#else
1529static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p,
1530 struct nlattr *attr, int cmd,
1531 struct netlink_ext_ack *extack)
1532{
1533 return -EOPNOTSUPP;
1534}
1535
1536static inline bool br_mrp_enabled(struct net_bridge *br)
1537{
1538 return false;
1539}
1540
1541static inline void br_mrp_port_del(struct net_bridge *br,
1542 struct net_bridge_port *p)
1543{
1544}
1545
1546static inline int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br)
1547{
1548 return 0;
1549}
1550
1551#endif
1552
1553/* br_cfm.c */
1554#if IS_ENABLED(CONFIG_BRIDGE_CFM)
1555int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1556 struct nlattr *attr, int cmd, struct netlink_ext_ack *extack);
1557bool br_cfm_created(struct net_bridge *br);
1558void br_cfm_port_del(struct net_bridge *br, struct net_bridge_port *p);
1559int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br);
1560int br_cfm_status_fill_info(struct sk_buff *skb,
1561 struct net_bridge *br,
1562 bool getlink);
1563int br_cfm_mep_count(struct net_bridge *br, u32 *count);
1564int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count);
1565#else
1566static inline int br_cfm_parse(struct net_bridge *br, struct net_bridge_port *p,
1567 struct nlattr *attr, int cmd,
1568 struct netlink_ext_ack *extack)
1569{
1570 return -EOPNOTSUPP;
1571}
1572
1573static inline bool br_cfm_created(struct net_bridge *br)
1574{
1575 return false;
1576}
1577
1578static inline void br_cfm_port_del(struct net_bridge *br,
1579 struct net_bridge_port *p)
1580{
1581}
1582
1583static inline int br_cfm_config_fill_info(struct sk_buff *skb, struct net_bridge *br)
1584{
1585 return -EOPNOTSUPP;
1586}
1587
1588static inline int br_cfm_status_fill_info(struct sk_buff *skb,
1589 struct net_bridge *br,
1590 bool getlink)
1591{
1592 return -EOPNOTSUPP;
1593}
1594
1595static inline int br_cfm_mep_count(struct net_bridge *br, u32 *count)
1596{
1597 return -EOPNOTSUPP;
1598}
1599
1600static inline int br_cfm_peer_mep_count(struct net_bridge *br, u32 *count)
1601{
1602 return -EOPNOTSUPP;
1603}
1604#endif
1605
1606/* br_netlink.c */
1607extern struct rtnl_link_ops br_link_ops;
1608int br_netlink_init(void);
1609void br_netlink_fini(void);
1610void br_ifinfo_notify(int event, const struct net_bridge *br,
1611 const struct net_bridge_port *port);
1612void br_info_notify(int event, const struct net_bridge *br,
1613 const struct net_bridge_port *port, u32 filter);
1614int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags,
1615 struct netlink_ext_ack *extack);
1616int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1617int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1618 u32 filter_mask, int nlflags);
1619int br_process_vlan_info(struct net_bridge *br,
1620 struct net_bridge_port *p, int cmd,
1621 struct bridge_vlan_info *vinfo_curr,
1622 struct bridge_vlan_info **vinfo_last,
1623 bool *changed,
1624 struct netlink_ext_ack *extack);
1625
1626#ifdef CONFIG_SYSFS
1627/* br_sysfs_if.c */
1628extern const struct sysfs_ops brport_sysfs_ops;
1629int br_sysfs_addif(struct net_bridge_port *p);
1630int br_sysfs_renameif(struct net_bridge_port *p);
1631
1632/* br_sysfs_br.c */
1633int br_sysfs_addbr(struct net_device *dev);
1634void br_sysfs_delbr(struct net_device *dev);
1635
1636#else
1637
1638static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
1639static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
1640static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
1641static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1642#endif /* CONFIG_SYSFS */
1643
1644/* br_switchdev.c */
1645#ifdef CONFIG_NET_SWITCHDEV
1646int nbp_switchdev_mark_set(struct net_bridge_port *p);
1647void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1648 struct sk_buff *skb);
1649bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1650 const struct sk_buff *skb);
1651int br_switchdev_set_port_flag(struct net_bridge_port *p,
1652 unsigned long flags,
1653 unsigned long mask,
1654 struct netlink_ext_ack *extack);
1655void br_switchdev_fdb_notify(struct net_bridge *br,
1656 const struct net_bridge_fdb_entry *fdb, int type);
1657int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags,
1658 struct netlink_ext_ack *extack);
1659int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid);
1660
1661static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1662{
1663 skb->offload_fwd_mark = 0;
1664}
1665#else
1666static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
1667{
1668 return 0;
1669}
1670
1671static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
1672 struct sk_buff *skb)
1673{
1674}
1675
1676static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
1677 const struct sk_buff *skb)
1678{
1679 return true;
1680}
1681
1682static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
1683 unsigned long flags,
1684 unsigned long mask,
1685 struct netlink_ext_ack *extack)
1686{
1687 return 0;
1688}
1689
1690static inline int br_switchdev_port_vlan_add(struct net_device *dev,
1691 u16 vid, u16 flags,
1692 struct netlink_ext_ack *extack)
1693{
1694 return -EOPNOTSUPP;
1695}
1696
1697static inline int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid)
1698{
1699 return -EOPNOTSUPP;
1700}
1701
1702static inline void
1703br_switchdev_fdb_notify(struct net_bridge *br,
1704 const struct net_bridge_fdb_entry *fdb, int type)
1705{
1706}
1707
1708static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
1709{
1710}
1711#endif /* CONFIG_NET_SWITCHDEV */
1712
1713/* br_arp_nd_proxy.c */
1714void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1715void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
1716 u16 vid, struct net_bridge_port *p);
1717void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
1718 u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
1719struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
1720#endif