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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/*
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