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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
33#define BR_GROUPFWD_DEFAULT 0
34
35#define BR_GROUPFWD_RESTRICTED 0x4007u
36
37
38#define BR_STP_PROG "/sbin/bridge-stp"
39
40typedef struct bridge_id bridge_id;
41typedef struct mac_addr mac_addr;
42typedef __u16 port_id;
43
44struct bridge_id
45{
46 unsigned char prio[2];
47 unsigned char addr[6];
48};
49
50struct mac_addr
51{
52 unsigned char addr[6];
53};
54
55struct br_ip
56{
57 union {
58 __be32 ip4;
59#if IS_ENABLED(CONFIG_IPV6)
60 struct in6_addr ip6;
61#endif
62 } u;
63 __be16 proto;
64};
65
66struct net_bridge_fdb_entry
67{
68 struct hlist_node hlist;
69 struct net_bridge_port *dst;
70
71 struct rcu_head rcu;
72 unsigned long updated;
73 unsigned long used;
74 mac_addr addr;
75 unsigned char is_local;
76 unsigned char is_static;
77};
78
79struct net_bridge_port_group {
80 struct net_bridge_port *port;
81 struct net_bridge_port_group __rcu *next;
82 struct hlist_node mglist;
83 struct rcu_head rcu;
84 struct timer_list timer;
85 struct br_ip addr;
86};
87
88struct net_bridge_mdb_entry
89{
90 struct hlist_node hlist[2];
91 struct net_bridge *br;
92 struct net_bridge_port_group __rcu *ports;
93 struct rcu_head rcu;
94 struct timer_list timer;
95 struct br_ip addr;
96 bool mglist;
97};
98
99struct net_bridge_mdb_htable
100{
101 struct hlist_head *mhash;
102 struct rcu_head rcu;
103 struct net_bridge_mdb_htable *old;
104 u32 size;
105 u32 max;
106 u32 secret;
107 u32 ver;
108};
109
110struct net_bridge_port
111{
112 struct net_bridge *br;
113 struct net_device *dev;
114 struct list_head list;
115
116
117 u8 priority;
118 u8 state;
119 u16 port_no;
120 unsigned char topology_change_ack;
121 unsigned char config_pending;
122 port_id port_id;
123 port_id designated_port;
124 bridge_id designated_root;
125 bridge_id designated_bridge;
126 u32 path_cost;
127 u32 designated_cost;
128 unsigned long designated_age;
129
130 struct timer_list forward_delay_timer;
131 struct timer_list hold_timer;
132 struct timer_list message_age_timer;
133 struct kobject kobj;
134 struct rcu_head rcu;
135
136 unsigned long flags;
137#define BR_HAIRPIN_MODE 0x00000001
138
139#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
140 u32 multicast_startup_queries_sent;
141 unsigned char multicast_router;
142 struct timer_list multicast_router_timer;
143 struct timer_list multicast_query_timer;
144 struct hlist_head mglist;
145 struct hlist_node rlist;
146#endif
147
148#ifdef CONFIG_SYSFS
149 char sysfs_name[IFNAMSIZ];
150#endif
151
152#ifdef CONFIG_NET_POLL_CONTROLLER
153 struct netpoll *np;
154#endif
155};
156
157#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
158
159static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
160{
161 struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
162 return br_port_exists(dev) ? port : NULL;
163}
164
165static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
166{
167 return br_port_exists(dev) ?
168 rtnl_dereference(dev->rx_handler_data) : NULL;
169}
170
171struct br_cpu_netstats {
172 u64 rx_packets;
173 u64 rx_bytes;
174 u64 tx_packets;
175 u64 tx_bytes;
176 struct u64_stats_sync syncp;
177};
178
179struct net_bridge
180{
181 spinlock_t lock;
182 struct list_head port_list;
183 struct net_device *dev;
184
185 struct br_cpu_netstats __percpu *stats;
186 spinlock_t hash_lock;
187 struct hlist_head hash[BR_HASH_SIZE];
188#ifdef CONFIG_BRIDGE_NETFILTER
189 struct rtable fake_rtable;
190 bool nf_call_iptables;
191 bool nf_call_ip6tables;
192 bool nf_call_arptables;
193#endif
194 unsigned long flags;
195#define BR_SET_MAC_ADDR 0x00000001
196
197 u16 group_fwd_mask;
198
199
200 bridge_id designated_root;
201 bridge_id bridge_id;
202 u32 root_path_cost;
203 unsigned long max_age;
204 unsigned long hello_time;
205 unsigned long forward_delay;
206 unsigned long bridge_max_age;
207 unsigned long ageing_time;
208 unsigned long bridge_hello_time;
209 unsigned long bridge_forward_delay;
210
211 u8 group_addr[ETH_ALEN];
212 u16 root_port;
213
214 enum {
215 BR_NO_STP,
216 BR_KERNEL_STP,
217 BR_USER_STP,
218 } stp_enabled;
219
220 unsigned char topology_change;
221 unsigned char topology_change_detected;
222
223#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
224 unsigned char multicast_router;
225
226 u8 multicast_disabled:1;
227
228 u32 hash_elasticity;
229 u32 hash_max;
230
231 u32 multicast_last_member_count;
232 u32 multicast_startup_queries_sent;
233 u32 multicast_startup_query_count;
234
235 unsigned long multicast_last_member_interval;
236 unsigned long multicast_membership_interval;
237 unsigned long multicast_querier_interval;
238 unsigned long multicast_query_interval;
239 unsigned long multicast_query_response_interval;
240 unsigned long multicast_startup_query_interval;
241
242 spinlock_t multicast_lock;
243 struct net_bridge_mdb_htable __rcu *mdb;
244 struct hlist_head router_list;
245
246 struct timer_list multicast_router_timer;
247 struct timer_list multicast_querier_timer;
248 struct timer_list multicast_query_timer;
249#endif
250
251 struct timer_list hello_timer;
252 struct timer_list tcn_timer;
253 struct timer_list topology_change_timer;
254 struct timer_list gc_timer;
255 struct kobject *ifobj;
256};
257
258struct br_input_skb_cb {
259 struct net_device *brdev;
260#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
261 int igmp;
262 int mrouters_only;
263#endif
264};
265
266#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
267
268#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
269# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
270#else
271# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
272#endif
273
274#define br_printk(level, br, format, args...) \
275 printk(level "%s: " format, (br)->dev->name, ##args)
276
277#define br_err(__br, format, args...) \
278 br_printk(KERN_ERR, __br, format, ##args)
279#define br_warn(__br, format, args...) \
280 br_printk(KERN_WARNING, __br, format, ##args)
281#define br_notice(__br, format, args...) \
282 br_printk(KERN_NOTICE, __br, format, ##args)
283#define br_info(__br, format, args...) \
284 br_printk(KERN_INFO, __br, format, ##args)
285
286#define br_debug(br, format, args...) \
287 pr_debug("%s: " format, (br)->dev->name, ##args)
288
289extern struct notifier_block br_device_notifier;
290extern const u8 br_group_address[ETH_ALEN];
291
292
293static inline int br_is_root_bridge(const struct net_bridge *br)
294{
295 return !memcmp(&br->bridge_id, &br->designated_root, 8);
296}
297
298
299extern void br_dev_setup(struct net_device *dev);
300extern void br_dev_delete(struct net_device *dev, struct list_head *list);
301extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
302 struct net_device *dev);
303#ifdef CONFIG_NET_POLL_CONTROLLER
304static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
305{
306 return br->dev->npinfo;
307}
308
309static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
310 struct sk_buff *skb)
311{
312 struct netpoll *np = p->np;
313
314 if (np)
315 netpoll_send_skb(np, skb);
316}
317
318extern int br_netpoll_enable(struct net_bridge_port *p);
319extern void br_netpoll_disable(struct net_bridge_port *p);
320#else
321static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
322{
323 return NULL;
324}
325
326static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
327 struct sk_buff *skb)
328{
329}
330
331static inline int br_netpoll_enable(struct net_bridge_port *p)
332{
333 return 0;
334}
335
336static inline void br_netpoll_disable(struct net_bridge_port *p)
337{
338}
339#endif
340
341
342extern int br_fdb_init(void);
343extern void br_fdb_fini(void);
344extern void br_fdb_flush(struct net_bridge *br);
345extern void br_fdb_changeaddr(struct net_bridge_port *p,
346 const unsigned char *newaddr);
347extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
348extern void br_fdb_cleanup(unsigned long arg);
349extern void br_fdb_delete_by_port(struct net_bridge *br,
350 const struct net_bridge_port *p, int do_all);
351extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
352 const unsigned char *addr);
353extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
354extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
355 unsigned long count, unsigned long off);
356extern int br_fdb_insert(struct net_bridge *br,
357 struct net_bridge_port *source,
358 const unsigned char *addr);
359extern void br_fdb_update(struct net_bridge *br,
360 struct net_bridge_port *source,
361 const unsigned char *addr);
362extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
363extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
364extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
365
366
367extern void br_deliver(const struct net_bridge_port *to,
368 struct sk_buff *skb);
369extern int br_dev_queue_push_xmit(struct sk_buff *skb);
370extern void br_forward(const struct net_bridge_port *to,
371 struct sk_buff *skb, struct sk_buff *skb0);
372extern int br_forward_finish(struct sk_buff *skb);
373extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
374extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
375 struct sk_buff *skb2);
376
377
378extern void br_port_carrier_check(struct net_bridge_port *p);
379extern int br_add_bridge(struct net *net, const char *name);
380extern int br_del_bridge(struct net *net, const char *name);
381extern void br_net_exit(struct net *net);
382extern int br_add_if(struct net_bridge *br,
383 struct net_device *dev);
384extern int br_del_if(struct net_bridge *br,
385 struct net_device *dev);
386extern int br_min_mtu(const struct net_bridge *br);
387extern netdev_features_t br_features_recompute(struct net_bridge *br,
388 netdev_features_t features);
389
390
391extern int br_handle_frame_finish(struct sk_buff *skb);
392extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
393
394
395extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
396extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
397
398
399#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
400extern int br_multicast_rcv(struct net_bridge *br,
401 struct net_bridge_port *port,
402 struct sk_buff *skb);
403extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
404 struct sk_buff *skb);
405extern void br_multicast_add_port(struct net_bridge_port *port);
406extern void br_multicast_del_port(struct net_bridge_port *port);
407extern void br_multicast_enable_port(struct net_bridge_port *port);
408extern void br_multicast_disable_port(struct net_bridge_port *port);
409extern void br_multicast_init(struct net_bridge *br);
410extern void br_multicast_open(struct net_bridge *br);
411extern void br_multicast_stop(struct net_bridge *br);
412extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
413 struct sk_buff *skb);
414extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
415 struct sk_buff *skb, struct sk_buff *skb2);
416extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
417extern int br_multicast_set_port_router(struct net_bridge_port *p,
418 unsigned long val);
419extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
420extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
421
422static inline bool br_multicast_is_router(struct net_bridge *br)
423{
424 return br->multicast_router == 2 ||
425 (br->multicast_router == 1 &&
426 timer_pending(&br->multicast_router_timer));
427}
428#else
429static inline int br_multicast_rcv(struct net_bridge *br,
430 struct net_bridge_port *port,
431 struct sk_buff *skb)
432{
433 return 0;
434}
435
436static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
437 struct sk_buff *skb)
438{
439 return NULL;
440}
441
442static inline void br_multicast_add_port(struct net_bridge_port *port)
443{
444}
445
446static inline void br_multicast_del_port(struct net_bridge_port *port)
447{
448}
449
450static inline void br_multicast_enable_port(struct net_bridge_port *port)
451{
452}
453
454static inline void br_multicast_disable_port(struct net_bridge_port *port)
455{
456}
457
458static inline void br_multicast_init(struct net_bridge *br)
459{
460}
461
462static inline void br_multicast_open(struct net_bridge *br)
463{
464}
465
466static inline void br_multicast_stop(struct net_bridge *br)
467{
468}
469
470static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
471 struct sk_buff *skb)
472{
473}
474
475static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
476 struct sk_buff *skb,
477 struct sk_buff *skb2)
478{
479}
480static inline bool br_multicast_is_router(struct net_bridge *br)
481{
482 return 0;
483}
484#endif
485
486
487#ifdef CONFIG_BRIDGE_NETFILTER
488extern int br_netfilter_init(void);
489extern void br_netfilter_fini(void);
490extern void br_netfilter_rtable_init(struct net_bridge *);
491#else
492#define br_netfilter_init() (0)
493#define br_netfilter_fini() do { } while(0)
494#define br_netfilter_rtable_init(x)
495#endif
496
497
498extern void br_log_state(const struct net_bridge_port *p);
499extern struct net_bridge_port *br_get_port(struct net_bridge *br,
500 u16 port_no);
501extern void br_init_port(struct net_bridge_port *p);
502extern void br_become_designated_port(struct net_bridge_port *p);
503
504extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
505extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
506extern int br_set_max_age(struct net_bridge *br, unsigned long x);
507
508
509
510extern void br_stp_enable_bridge(struct net_bridge *br);
511extern void br_stp_disable_bridge(struct net_bridge *br);
512extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
513extern void br_stp_enable_port(struct net_bridge_port *p);
514extern void br_stp_disable_port(struct net_bridge_port *p);
515extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
516extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
517extern void br_stp_set_bridge_priority(struct net_bridge *br,
518 u16 newprio);
519extern int br_stp_set_port_priority(struct net_bridge_port *p,
520 unsigned long newprio);
521extern int br_stp_set_path_cost(struct net_bridge_port *p,
522 unsigned long path_cost);
523extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
524
525
526struct stp_proto;
527extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
528 struct net_device *dev);
529
530
531extern void br_stp_timer_init(struct net_bridge *br);
532extern void br_stp_port_timer_init(struct net_bridge_port *p);
533extern unsigned long br_timer_value(const struct timer_list *timer);
534
535
536#if IS_ENABLED(CONFIG_ATM_LANE)
537extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
538#endif
539
540
541extern int br_netlink_init(void);
542extern void br_netlink_fini(void);
543extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
544
545#ifdef CONFIG_SYSFS
546
547extern const struct sysfs_ops brport_sysfs_ops;
548extern int br_sysfs_addif(struct net_bridge_port *p);
549extern int br_sysfs_renameif(struct net_bridge_port *p);
550
551
552extern int br_sysfs_addbr(struct net_device *dev);
553extern void br_sysfs_delbr(struct net_device *dev);
554
555#else
556
557#define br_sysfs_addif(p) (0)
558#define br_sysfs_renameif(p) (0)
559#define br_sysfs_addbr(dev) (0)
560#define br_sysfs_delbr(dev) do { } while(0)
561#endif
562
563#endif
564
