Merge branch 'master' of ra.kernel.org:/pub/scm/linux/kernel/git/davem/net
[linux-3.10.git] / net / bridge / br_private.h
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 /* Control of forwarding link local multicast */
33 #define BR_GROUPFWD_DEFAULT     0
34 /* Don't allow forwarding control protocols like STP and LLDP */
35 #define BR_GROUPFWD_RESTRICTED  0x4007u
36
37 /* Path to usermode spanning tree program */
38 #define BR_STP_PROG     "/sbin/bridge-stp"
39
40 typedef struct bridge_id bridge_id;
41 typedef struct mac_addr mac_addr;
42 typedef __u16 port_id;
43
44 struct bridge_id
45 {
46         unsigned char   prio[2];
47         unsigned char   addr[6];
48 };
49
50 struct mac_addr
51 {
52         unsigned char   addr[6];
53 };
54
55 struct br_ip
56 {
57         union {
58                 __be32  ip4;
59 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
60                 struct in6_addr ip6;
61 #endif
62         } u;
63         __be16          proto;
64 };
65
66 struct 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
79 struct 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 timer_list               query_timer;
86         struct br_ip                    addr;
87         u32                             queries_sent;
88 };
89
90 struct net_bridge_mdb_entry
91 {
92         struct hlist_node               hlist[2];
93         struct net_bridge               *br;
94         struct net_bridge_port_group __rcu *ports;
95         struct rcu_head                 rcu;
96         struct timer_list               timer;
97         struct timer_list               query_timer;
98         struct br_ip                    addr;
99         bool                            mglist;
100         u32                             queries_sent;
101 };
102
103 struct net_bridge_mdb_htable
104 {
105         struct hlist_head               *mhash;
106         struct rcu_head                 rcu;
107         struct net_bridge_mdb_htable    *old;
108         u32                             size;
109         u32                             max;
110         u32                             secret;
111         u32                             ver;
112 };
113
114 struct net_bridge_port
115 {
116         struct net_bridge               *br;
117         struct net_device               *dev;
118         struct list_head                list;
119
120         /* STP */
121         u8                              priority;
122         u8                              state;
123         u16                             port_no;
124         unsigned char                   topology_change_ack;
125         unsigned char                   config_pending;
126         port_id                         port_id;
127         port_id                         designated_port;
128         bridge_id                       designated_root;
129         bridge_id                       designated_bridge;
130         u32                             path_cost;
131         u32                             designated_cost;
132         unsigned long                   designated_age;
133
134         struct timer_list               forward_delay_timer;
135         struct timer_list               hold_timer;
136         struct timer_list               message_age_timer;
137         struct kobject                  kobj;
138         struct rcu_head                 rcu;
139
140         unsigned long                   flags;
141 #define BR_HAIRPIN_MODE         0x00000001
142
143 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
144         u32                             multicast_startup_queries_sent;
145         unsigned char                   multicast_router;
146         struct timer_list               multicast_router_timer;
147         struct timer_list               multicast_query_timer;
148         struct hlist_head               mglist;
149         struct hlist_node               rlist;
150 #endif
151
152 #ifdef CONFIG_SYSFS
153         char                            sysfs_name[IFNAMSIZ];
154 #endif
155
156 #ifdef CONFIG_NET_POLL_CONTROLLER
157         struct netpoll                  *np;
158 #endif
159 };
160
161 #define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
162
163 static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
164 {
165         struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
166         return br_port_exists(dev) ? port : NULL;
167 }
168
169 static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
170 {
171         return br_port_exists(dev) ?
172                 rtnl_dereference(dev->rx_handler_data) : NULL;
173 }
174
175 struct br_cpu_netstats {
176         u64                     rx_packets;
177         u64                     rx_bytes;
178         u64                     tx_packets;
179         u64                     tx_bytes;
180         struct u64_stats_sync   syncp;
181 };
182
183 struct net_bridge
184 {
185         spinlock_t                      lock;
186         struct list_head                port_list;
187         struct net_device               *dev;
188
189         struct br_cpu_netstats __percpu *stats;
190         spinlock_t                      hash_lock;
191         struct hlist_head               hash[BR_HASH_SIZE];
192 #ifdef CONFIG_BRIDGE_NETFILTER
193         struct rtable                   fake_rtable;
194         bool                            nf_call_iptables;
195         bool                            nf_call_ip6tables;
196         bool                            nf_call_arptables;
197 #endif
198         unsigned long                   flags;
199 #define BR_SET_MAC_ADDR         0x00000001
200
201         u16                             group_fwd_mask;
202
203         /* STP */
204         bridge_id                       designated_root;
205         bridge_id                       bridge_id;
206         u32                             root_path_cost;
207         unsigned long                   max_age;
208         unsigned long                   hello_time;
209         unsigned long                   forward_delay;
210         unsigned long                   bridge_max_age;
211         unsigned long                   ageing_time;
212         unsigned long                   bridge_hello_time;
213         unsigned long                   bridge_forward_delay;
214
215         u8                              group_addr[ETH_ALEN];
216         u16                             root_port;
217
218         enum {
219                 BR_NO_STP,              /* no spanning tree */
220                 BR_KERNEL_STP,          /* old STP in kernel */
221                 BR_USER_STP,            /* new RSTP in userspace */
222         } stp_enabled;
223
224         unsigned char                   topology_change;
225         unsigned char                   topology_change_detected;
226
227 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
228         unsigned char                   multicast_router;
229
230         u8                              multicast_disabled:1;
231
232         u32                             hash_elasticity;
233         u32                             hash_max;
234
235         u32                             multicast_last_member_count;
236         u32                             multicast_startup_queries_sent;
237         u32                             multicast_startup_query_count;
238
239         unsigned long                   multicast_last_member_interval;
240         unsigned long                   multicast_membership_interval;
241         unsigned long                   multicast_querier_interval;
242         unsigned long                   multicast_query_interval;
243         unsigned long                   multicast_query_response_interval;
244         unsigned long                   multicast_startup_query_interval;
245
246         spinlock_t                      multicast_lock;
247         struct net_bridge_mdb_htable __rcu *mdb;
248         struct hlist_head               router_list;
249
250         struct timer_list               multicast_router_timer;
251         struct timer_list               multicast_querier_timer;
252         struct timer_list               multicast_query_timer;
253 #endif
254
255         struct timer_list               hello_timer;
256         struct timer_list               tcn_timer;
257         struct timer_list               topology_change_timer;
258         struct timer_list               gc_timer;
259         struct kobject                  *ifobj;
260 };
261
262 struct br_input_skb_cb {
263         struct net_device *brdev;
264 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
265         int igmp;
266         int mrouters_only;
267 #endif
268 };
269
270 #define BR_INPUT_SKB_CB(__skb)  ((struct br_input_skb_cb *)(__skb)->cb)
271
272 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
273 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (BR_INPUT_SKB_CB(__skb)->mrouters_only)
274 #else
275 # define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)   (0)
276 #endif
277
278 #define br_printk(level, br, format, args...)   \
279         printk(level "%s: " format, (br)->dev->name, ##args)
280
281 #define br_err(__br, format, args...)                   \
282         br_printk(KERN_ERR, __br, format, ##args)
283 #define br_warn(__br, format, args...)                  \
284         br_printk(KERN_WARNING, __br, format, ##args)
285 #define br_notice(__br, format, args...)                \
286         br_printk(KERN_NOTICE, __br, format, ##args)
287 #define br_info(__br, format, args...)                  \
288         br_printk(KERN_INFO, __br, format, ##args)
289
290 #define br_debug(br, format, args...)                   \
291         pr_debug("%s: " format,  (br)->dev->name, ##args)
292
293 extern struct notifier_block br_device_notifier;
294 extern const u8 br_group_address[ETH_ALEN];
295
296 /* called under bridge lock */
297 static inline int br_is_root_bridge(const struct net_bridge *br)
298 {
299         return !memcmp(&br->bridge_id, &br->designated_root, 8);
300 }
301
302 /* br_device.c */
303 extern void br_dev_setup(struct net_device *dev);
304 extern void br_dev_delete(struct net_device *dev, struct list_head *list);
305 extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
306                                struct net_device *dev);
307 #ifdef CONFIG_NET_POLL_CONTROLLER
308 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
309 {
310         return br->dev->npinfo;
311 }
312
313 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
314                                        struct sk_buff *skb)
315 {
316         struct netpoll *np = p->np;
317
318         if (np)
319                 netpoll_send_skb(np, skb);
320 }
321
322 extern int br_netpoll_enable(struct net_bridge_port *p);
323 extern void br_netpoll_disable(struct net_bridge_port *p);
324 #else
325 static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
326 {
327         return NULL;
328 }
329
330 static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
331                                        struct sk_buff *skb)
332 {
333 }
334
335 static inline int br_netpoll_enable(struct net_bridge_port *p)
336 {
337         return 0;
338 }
339
340 static inline void br_netpoll_disable(struct net_bridge_port *p)
341 {
342 }
343 #endif
344
345 /* br_fdb.c */
346 extern int br_fdb_init(void);
347 extern void br_fdb_fini(void);
348 extern void br_fdb_flush(struct net_bridge *br);
349 extern void br_fdb_changeaddr(struct net_bridge_port *p,
350                               const unsigned char *newaddr);
351 extern void br_fdb_cleanup(unsigned long arg);
352 extern void br_fdb_delete_by_port(struct net_bridge *br,
353                                   const struct net_bridge_port *p, int do_all);
354 extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
355                                                  const unsigned char *addr);
356 extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
357 extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
358                           unsigned long count, unsigned long off);
359 extern int br_fdb_insert(struct net_bridge *br,
360                          struct net_bridge_port *source,
361                          const unsigned char *addr);
362 extern void br_fdb_update(struct net_bridge *br,
363                           struct net_bridge_port *source,
364                           const unsigned char *addr);
365 extern int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb);
366 extern int br_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
367 extern int br_fdb_delete(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg);
368
369 /* br_forward.c */
370 extern void br_deliver(const struct net_bridge_port *to,
371                 struct sk_buff *skb);
372 extern int br_dev_queue_push_xmit(struct sk_buff *skb);
373 extern void br_forward(const struct net_bridge_port *to,
374                 struct sk_buff *skb, struct sk_buff *skb0);
375 extern int br_forward_finish(struct sk_buff *skb);
376 extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
377 extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
378                              struct sk_buff *skb2);
379
380 /* br_if.c */
381 extern void br_port_carrier_check(struct net_bridge_port *p);
382 extern int br_add_bridge(struct net *net, const char *name);
383 extern int br_del_bridge(struct net *net, const char *name);
384 extern void br_net_exit(struct net *net);
385 extern int br_add_if(struct net_bridge *br,
386               struct net_device *dev);
387 extern int br_del_if(struct net_bridge *br,
388               struct net_device *dev);
389 extern int br_min_mtu(const struct net_bridge *br);
390 extern u32 br_features_recompute(struct net_bridge *br, u32 features);
391
392 /* br_input.c */
393 extern int br_handle_frame_finish(struct sk_buff *skb);
394 extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
395
396 /* br_ioctl.c */
397 extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
398 extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
399
400 /* br_multicast.c */
401 #ifdef CONFIG_BRIDGE_IGMP_SNOOPING
402 extern int br_multicast_rcv(struct net_bridge *br,
403                             struct net_bridge_port *port,
404                             struct sk_buff *skb);
405 extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
406                                                struct sk_buff *skb);
407 extern void br_multicast_add_port(struct net_bridge_port *port);
408 extern void br_multicast_del_port(struct net_bridge_port *port);
409 extern void br_multicast_enable_port(struct net_bridge_port *port);
410 extern void br_multicast_disable_port(struct net_bridge_port *port);
411 extern void br_multicast_init(struct net_bridge *br);
412 extern void br_multicast_open(struct net_bridge *br);
413 extern void br_multicast_stop(struct net_bridge *br);
414 extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
415                                  struct sk_buff *skb);
416 extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
417                                  struct sk_buff *skb, struct sk_buff *skb2);
418 extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
419 extern int br_multicast_set_port_router(struct net_bridge_port *p,
420                                         unsigned long val);
421 extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
422 extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
423
424 static inline bool br_multicast_is_router(struct net_bridge *br)
425 {
426         return br->multicast_router == 2 ||
427                (br->multicast_router == 1 &&
428                 timer_pending(&br->multicast_router_timer));
429 }
430 #else
431 static inline int br_multicast_rcv(struct net_bridge *br,
432                                    struct net_bridge_port *port,
433                                    struct sk_buff *skb)
434 {
435         return 0;
436 }
437
438 static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
439                                                       struct sk_buff *skb)
440 {
441         return NULL;
442 }
443
444 static inline void br_multicast_add_port(struct net_bridge_port *port)
445 {
446 }
447
448 static inline void br_multicast_del_port(struct net_bridge_port *port)
449 {
450 }
451
452 static inline void br_multicast_enable_port(struct net_bridge_port *port)
453 {
454 }
455
456 static inline void br_multicast_disable_port(struct net_bridge_port *port)
457 {
458 }
459
460 static inline void br_multicast_init(struct net_bridge *br)
461 {
462 }
463
464 static inline void br_multicast_open(struct net_bridge *br)
465 {
466 }
467
468 static inline void br_multicast_stop(struct net_bridge *br)
469 {
470 }
471
472 static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
473                                         struct sk_buff *skb)
474 {
475 }
476
477 static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
478                                         struct sk_buff *skb,
479                                         struct sk_buff *skb2)
480 {
481 }
482 static inline bool br_multicast_is_router(struct net_bridge *br)
483 {
484         return 0;
485 }
486 #endif
487
488 /* br_netfilter.c */
489 #ifdef CONFIG_BRIDGE_NETFILTER
490 extern int br_netfilter_init(void);
491 extern void br_netfilter_fini(void);
492 extern void br_netfilter_rtable_init(struct net_bridge *);
493 #else
494 #define br_netfilter_init()     (0)
495 #define br_netfilter_fini()     do { } while(0)
496 #define br_netfilter_rtable_init(x)
497 #endif
498
499 /* br_stp.c */
500 extern void br_log_state(const struct net_bridge_port *p);
501 extern struct net_bridge_port *br_get_port(struct net_bridge *br,
502                                            u16 port_no);
503 extern void br_init_port(struct net_bridge_port *p);
504 extern void br_become_designated_port(struct net_bridge_port *p);
505
506 extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
507 extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
508 extern int br_set_max_age(struct net_bridge *br, unsigned long x);
509
510
511 /* br_stp_if.c */
512 extern void br_stp_enable_bridge(struct net_bridge *br);
513 extern void br_stp_disable_bridge(struct net_bridge *br);
514 extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
515 extern void br_stp_enable_port(struct net_bridge_port *p);
516 extern void br_stp_disable_port(struct net_bridge_port *p);
517 extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
518 extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
519 extern void br_stp_set_bridge_priority(struct net_bridge *br,
520                                        u16 newprio);
521 extern int br_stp_set_port_priority(struct net_bridge_port *p,
522                                     unsigned long newprio);
523 extern int br_stp_set_path_cost(struct net_bridge_port *p,
524                                 unsigned long path_cost);
525 extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
526
527 /* br_stp_bpdu.c */
528 struct stp_proto;
529 extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
530                        struct net_device *dev);
531
532 /* br_stp_timer.c */
533 extern void br_stp_timer_init(struct net_bridge *br);
534 extern void br_stp_port_timer_init(struct net_bridge_port *p);
535 extern unsigned long br_timer_value(const struct timer_list *timer);
536
537 /* br.c */
538 #if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
539 extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
540 #endif
541
542 /* br_netlink.c */
543 extern int br_netlink_init(void);
544 extern void br_netlink_fini(void);
545 extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
546
547 #ifdef CONFIG_SYSFS
548 /* br_sysfs_if.c */
549 extern const struct sysfs_ops brport_sysfs_ops;
550 extern int br_sysfs_addif(struct net_bridge_port *p);
551 extern int br_sysfs_renameif(struct net_bridge_port *p);
552
553 /* br_sysfs_br.c */
554 extern int br_sysfs_addbr(struct net_device *dev);
555 extern void br_sysfs_delbr(struct net_device *dev);
556
557 #else
558
559 #define br_sysfs_addif(p)       (0)
560 #define br_sysfs_renameif(p)    (0)
561 #define br_sysfs_addbr(dev)     (0)
562 #define br_sysfs_delbr(dev)     do { } while(0)
563 #endif /* CONFIG_SYSFS */
564
565 #endif