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bridge: notify mdb changes via netlink
[linux-2.6-block.git] / net / bridge / br_private.h
CommitLineData
1da177e4
LT		 1/*
2 * Linux ethernet bridge
3 *
4 * Authors:
5 * Lennert Buytenhek <buytenh@gnu.org>
6 *
1da177e4
LT		 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>
1da177e4 17#include <linux/if_bridge.h>
91d2c34a 18#include <linux/netpoll.h>
406818ff 19#include <linux/u64_stats_sync.h>
4adf0af6 20#include <net/route.h>
1da177e4
LT		 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
9cde0708
SH		 30#define BR_VERSION "2.3"
31
515853cc 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
9cde0708
SH		 37/* Path to usermode spanning tree program */
38#define BR_STP_PROG "/sbin/bridge-stp"
8cbb512e 39
1da177e4
LT		 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
8ef2a9a5
YH		 55struct br_ip
56{
57 union {
58 __be32 ip4;
dfd56b8b 59#if IS_ENABLED(CONFIG_IPV6)
08b202b6
YH		 60 struct in6_addr ip6;
61#endif
8ef2a9a5
YH		 62 } u;
63 __be16 proto;
64};
65
1da177e4
LT		 66struct net_bridge_fdb_entry
67{
68 struct hlist_node hlist;
69 struct net_bridge_port *dst;
70
71 struct rcu_head rcu;
7cd8861a 72 unsigned long updated;
73 unsigned long used;
1da177e4
LT		 74 mac_addr addr;
75 unsigned char is_local;
76 unsigned char is_static;
77};
78
eb1d1641
HX		 79struct net_bridge_port_group {
80 struct net_bridge_port *port;
e8051688 81 struct net_bridge_port_group __rcu *next;
eb1d1641
HX		 82 struct hlist_node mglist;
83 struct rcu_head rcu;
84 struct timer_list timer;
8ef2a9a5 85 struct br_ip addr;
eb1d1641
HX		 86};
87
88struct net_bridge_mdb_entry
89{
90 struct hlist_node hlist[2];
eb1d1641 91 struct net_bridge *br;
e8051688 92 struct net_bridge_port_group __rcu *ports;
eb1d1641
HX		 93 struct rcu_head rcu;
94 struct timer_list timer;
8ef2a9a5 95 struct br_ip addr;
8a870178 96 bool mglist;
eb1d1641
HX		 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
1da177e4
LT		 110struct net_bridge_port
111{
112 struct net_bridge *br;
113 struct net_device *dev;
114 struct list_head list;
115
116 /* STP */
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;
0c03150e 128 unsigned long designated_age;
1da177e4
LT		 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;
3982d3d2
FA		 135
136 unsigned long flags;
137#define BR_HAIRPIN_MODE 0x00000001
a2e01a65 138#define BR_BPDU_GUARD 0x00000002
1007dd1a 139#define BR_ROOT_BLOCK 0x00000004
c2d3babf 140#define BR_MULTICAST_FAST_LEAVE 0x00000008
eb1d1641
HX		 141
142#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
143 u32 multicast_startup_queries_sent;
144 unsigned char multicast_router;
145 struct timer_list multicast_router_timer;
146 struct timer_list multicast_query_timer;
147 struct hlist_head mglist;
148 struct hlist_node rlist;
149#endif
e0f43752
SA		 150
151#ifdef CONFIG_SYSFS
152 char sysfs_name[IFNAMSIZ];
153#endif
91d2c34a
HX		 154
155#ifdef CONFIG_NET_POLL_CONTROLLER
156 struct netpoll *np;
157#endif
1da177e4
LT		 158};
159
f350a0a8
JP		 160#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)
161
b5ed54e9 162static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
163{
2469ffd7
JF		 164 struct net_bridge_port *port =
165 rcu_dereference_rtnl(dev->rx_handler_data);
166
b5ed54e9 167 return br_port_exists(dev) ? port : NULL;
168}
169
ec1e5610 170static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
b5ed54e9 171{
ec1e5610
ED		 172 return br_port_exists(dev) ?
173 rtnl_dereference(dev->rx_handler_data) : NULL;
b5ed54e9 174}
175
0eae88f3 176struct br_cpu_netstats {
406818ff
ED		 177 u64 rx_packets;
178 u64 rx_bytes;
179 u64 tx_packets;
180 u64 tx_bytes;
181 struct u64_stats_sync syncp;
0eae88f3
ED		 182};
183
1da177e4
LT		 184struct net_bridge
185{
186 spinlock_t lock;
187 struct list_head port_list;
188 struct net_device *dev;
14bb4789 189
0eae88f3 190 struct br_cpu_netstats __percpu *stats;
1da177e4
LT		 191 spinlock_t hash_lock;
192 struct hlist_head hash[BR_HASH_SIZE];
4adf0af6
SW		 193#ifdef CONFIG_BRIDGE_NETFILTER
194 struct rtable fake_rtable;
4df53d8b
PM		 195 bool nf_call_iptables;
196 bool nf_call_ip6tables;
197 bool nf_call_arptables;
4adf0af6 198#endif
92c0574f
SH		 199 unsigned long flags;
200#define BR_SET_MAC_ADDR 0x00000001
1da177e4 201
515853cc 202 u16 group_fwd_mask;
203
1da177e4
LT		 204 /* STP */
205 bridge_id designated_root;
206 bridge_id bridge_id;
207 u32 root_path_cost;
208 unsigned long max_age;
209 unsigned long hello_time;
210 unsigned long forward_delay;
211 unsigned long bridge_max_age;
212 unsigned long ageing_time;
213 unsigned long bridge_hello_time;
214 unsigned long bridge_forward_delay;
215
fda93d92 216 u8 group_addr[ETH_ALEN];
1da177e4 217 u16 root_port;
9cde0708
SH		 218
219 enum {
220 BR_NO_STP, /* no spanning tree */
221 BR_KERNEL_STP, /* old STP in kernel */
222 BR_USER_STP, /* new RSTP in userspace */
223 } stp_enabled;
224
1da177e4
LT		 225 unsigned char topology_change;
226 unsigned char topology_change_detected;
227
eb1d1641
HX		 228#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
229 unsigned char multicast_router;
230
231 u8 multicast_disabled:1;
c5c23260 232 u8 multicast_querier:1;
eb1d1641
HX		 233
234 u32 hash_elasticity;
235 u32 hash_max;
236
237 u32 multicast_last_member_count;
238 u32 multicast_startup_queries_sent;
239 u32 multicast_startup_query_count;
240
241 unsigned long multicast_last_member_interval;
242 unsigned long multicast_membership_interval;
243 unsigned long multicast_querier_interval;
244 unsigned long multicast_query_interval;
245 unsigned long multicast_query_response_interval;
246 unsigned long multicast_startup_query_interval;
247
248 spinlock_t multicast_lock;
e8051688 249 struct net_bridge_mdb_htable __rcu *mdb;
eb1d1641 250 struct hlist_head router_list;
eb1d1641
HX		 251
252 struct timer_list multicast_router_timer;
253 struct timer_list multicast_querier_timer;
254 struct timer_list multicast_query_timer;
255#endif
256
1da177e4
LT		 257 struct timer_list hello_timer;
258 struct timer_list tcn_timer;
259 struct timer_list topology_change_timer;
260 struct timer_list gc_timer;
43b98c4a 261 struct kobject *ifobj;
1da177e4
LT		 262};
263
68b7c895
HX		 264struct br_input_skb_cb {
265 struct net_device *brdev;
32dec5dd 266#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
eb1d1641
HX		 267 int igmp;
268 int mrouters_only;
32dec5dd 269#endif
68b7c895
HX		 270};
271
272#define BR_INPUT_SKB_CB(__skb) ((struct br_input_skb_cb *)(__skb)->cb)
273
32dec5dd
YH		 274#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
275# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (BR_INPUT_SKB_CB(__skb)->mrouters_only)
276#else
277# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb) (0)
278#endif
279
28a16c97 280#define br_printk(level, br, format, args...) \
281 printk(level "%s: " format, (br)->dev->name, ##args)
282
283#define br_err(__br, format, args...) \
284 br_printk(KERN_ERR, __br, format, ##args)
285#define br_warn(__br, format, args...) \
286 br_printk(KERN_WARNING, __br, format, ##args)
287#define br_notice(__br, format, args...) \
288 br_printk(KERN_NOTICE, __br, format, ##args)
289#define br_info(__br, format, args...) \
290 br_printk(KERN_INFO, __br, format, ##args)
291
292#define br_debug(br, format, args...) \
293 pr_debug("%s: " format, (br)->dev->name, ##args)
294
1da177e4 295extern struct notifier_block br_device_notifier;
1da177e4
LT		 296
297/* called under bridge lock */
298static inline int br_is_root_bridge(const struct net_bridge *br)
299{
300 return !memcmp(&br->bridge_id, &br->designated_root, 8);
301}
302
1da177e4
LT		 303/* br_device.c */
304extern void br_dev_setup(struct net_device *dev);
1ce5cce8 305extern void br_dev_delete(struct net_device *dev, struct list_head *list);
6fef4c0c
SH		 306extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
307 struct net_device *dev);
cfb478da 308#ifdef CONFIG_NET_POLL_CONTROLLER
91d2c34a
HX		 309static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
310{
311 return br->dev->npinfo;
312}
313
314static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
315 struct sk_buff *skb)
316{
317 struct netpoll *np = p->np;
318
319 if (np)
320 netpoll_send_skb(np, skb);
321}
322
47be03a2 323extern int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp);
91d2c34a 324extern void br_netpoll_disable(struct net_bridge_port *p);
cfb478da 325#else
91d2c34a
HX		 326static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
327{
328 return NULL;
329}
330
9f70b0fc 331static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
91d2c34a
HX		 332 struct sk_buff *skb)
333{
334}
cfb478da 335
47be03a2 336static inline int br_netpoll_enable(struct net_bridge_port *p, gfp_t gfp)
91d2c34a
HX		 337{
338 return 0;
339}
340
341static inline void br_netpoll_disable(struct net_bridge_port *p)
342{
343}
cfb478da 344#endif
1da177e4
LT		 345
346/* br_fdb.c */
87a596e0 347extern int br_fdb_init(void);
1da177e4 348extern void br_fdb_fini(void);
9cf63747 349extern void br_fdb_flush(struct net_bridge *br);
1da177e4
LT		 350extern void br_fdb_changeaddr(struct net_bridge_port *p,
351 const unsigned char *newaddr);
43598813 352extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
1da177e4
LT		 353extern void br_fdb_cleanup(unsigned long arg);
354extern void br_fdb_delete_by_port(struct net_bridge *br,
1a620698 355 const struct net_bridge_port *p, int do_all);
1da177e4
LT		 356extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
357 const unsigned char *addr);
da678292 358extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
9d6f229f 359extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
1da177e4
LT		 360 unsigned long count, unsigned long off);
361extern int br_fdb_insert(struct net_bridge *br,
362 struct net_bridge_port *source,
363 const unsigned char *addr);
364extern void br_fdb_update(struct net_bridge *br,
365 struct net_bridge_port *source,
366 const unsigned char *addr);
77162022
JF		 367
368extern int br_fdb_delete(struct ndmsg *ndm,
369 struct net_device *dev,
6b6e2725 370 const unsigned char *addr);
edc7d573 371extern int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[],
77162022 372 struct net_device *dev,
6b6e2725 373 const unsigned char *addr,
77162022
JF		 374 u16 nlh_flags);
375extern int br_fdb_dump(struct sk_buff *skb,
376 struct netlink_callback *cb,
377 struct net_device *dev,
378 int idx);
1da177e4
LT		 379
380/* br_forward.c */
381extern void br_deliver(const struct net_bridge_port *to,
382 struct sk_buff *skb);
383extern int br_dev_queue_push_xmit(struct sk_buff *skb);
384extern void br_forward(const struct net_bridge_port *to,
7f7708f0 385 struct sk_buff *skb, struct sk_buff *skb0);
1da177e4 386extern int br_forward_finish(struct sk_buff *skb);
e081e1e3 387extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
b33084be
HX		 388extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
389 struct sk_buff *skb2);
1da177e4
LT		 390
391/* br_if.c */
269def7c 392extern void br_port_carrier_check(struct net_bridge_port *p);
4aa678ba
AD		 393extern int br_add_bridge(struct net *net, const char *name);
394extern int br_del_bridge(struct net *net, const char *name);
712d6954 395extern void br_net_exit(struct net *net);
1da177e4
LT		 396extern int br_add_if(struct net_bridge *br,
397 struct net_device *dev);
398extern int br_del_if(struct net_bridge *br,
399 struct net_device *dev);
400extern int br_min_mtu(const struct net_bridge *br);
c8f44aff
MM		 401extern netdev_features_t br_features_recompute(struct net_bridge *br,
402 netdev_features_t features);
1da177e4
LT		 403
404/* br_input.c */
405extern int br_handle_frame_finish(struct sk_buff *skb);
8a4eb573 406extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
1da177e4
LT		 407
408/* br_ioctl.c */
409extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
881d966b 410extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
1da177e4 411
eb1d1641
HX		 412/* br_multicast.c */
413#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
2ce297fc 414extern unsigned int br_mdb_rehash_seq;
eb1d1641
HX		 415extern int br_multicast_rcv(struct net_bridge *br,
416 struct net_bridge_port *port,
417 struct sk_buff *skb);
418extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
419 struct sk_buff *skb);
420extern void br_multicast_add_port(struct net_bridge_port *port);
421extern void br_multicast_del_port(struct net_bridge_port *port);
422extern void br_multicast_enable_port(struct net_bridge_port *port);
423extern void br_multicast_disable_port(struct net_bridge_port *port);
424extern void br_multicast_init(struct net_bridge *br);
425extern void br_multicast_open(struct net_bridge *br);
426extern void br_multicast_stop(struct net_bridge *br);
5cb5e947
HX		 427extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
428 struct sk_buff *skb);
429extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
430 struct sk_buff *skb, struct sk_buff *skb2);
0909e117
HX		 431extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
432extern int br_multicast_set_port_router(struct net_bridge_port *p,
433 unsigned long val);
561f1103 434extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
c5c23260 435extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
b195167f 436extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
ee07c6e7 437extern void br_mdb_init(void);
37a393bc
CW		 438extern void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
439 struct br_ip *group, int type);
85b35269
SS		 440
441static inline bool br_multicast_is_router(struct net_bridge *br)
442{
443 return br->multicast_router == 2 ||
444 (br->multicast_router == 1 &&
445 timer_pending(&br->multicast_router_timer));
446}
eb1d1641
HX		 447#else
448static inline int br_multicast_rcv(struct net_bridge *br,
449 struct net_bridge_port *port,
450 struct sk_buff *skb)
451{
452 return 0;
453}
454
455static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
456 struct sk_buff *skb)
457{
458 return NULL;
459}
460
461static inline void br_multicast_add_port(struct net_bridge_port *port)
462{
463}
464
465static inline void br_multicast_del_port(struct net_bridge_port *port)
466{
467}
468
469static inline void br_multicast_enable_port(struct net_bridge_port *port)
470{
471}
472
473static inline void br_multicast_disable_port(struct net_bridge_port *port)
474{
475}
476
477static inline void br_multicast_init(struct net_bridge *br)
478{
479}
480
481static inline void br_multicast_open(struct net_bridge *br)
482{
483}
484
485static inline void br_multicast_stop(struct net_bridge *br)
486{
487}
5cb5e947
HX		 488
489static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
490 struct sk_buff *skb)
491{
492}
493
494static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
495 struct sk_buff *skb,
496 struct sk_buff *skb2)
497{
498}
eb1d1641
HX		 499static inline bool br_multicast_is_router(struct net_bridge *br)
500{
85b35269 501 return 0;
eb1d1641 502}
85b35269 503#endif
eb1d1641 504
1da177e4 505/* br_netfilter.c */
c0909713 506#ifdef CONFIG_BRIDGE_NETFILTER
1da177e4
LT		 507extern int br_netfilter_init(void);
508extern void br_netfilter_fini(void);
4adf0af6 509extern void br_netfilter_rtable_init(struct net_bridge *);
c0909713
SH		 510#else
511#define br_netfilter_init() (0)
512#define br_netfilter_fini() do { } while(0)
4adf0af6 513#define br_netfilter_rtable_init(x)
c0909713 514#endif
1da177e4
LT		 515
516/* br_stp.c */
517extern void br_log_state(const struct net_bridge_port *p);
518extern struct net_bridge_port *br_get_port(struct net_bridge *br,
9d6f229f 519 u16 port_no);
1da177e4
LT		 520extern void br_init_port(struct net_bridge_port *p);
521extern void br_become_designated_port(struct net_bridge_port *p);
522
14f98f25 523extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
524extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
525extern int br_set_max_age(struct net_bridge *br, unsigned long x);
526
527
1da177e4
LT		 528/* br_stp_if.c */
529extern void br_stp_enable_bridge(struct net_bridge *br);
530extern void br_stp_disable_bridge(struct net_bridge *br);
9cde0708 531extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
1da177e4
LT		 532extern void br_stp_enable_port(struct net_bridge_port *p);
533extern void br_stp_disable_port(struct net_bridge_port *p);
edf947f1 534extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
4505a3ef 535extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
1da177e4
LT		 536extern void br_stp_set_bridge_priority(struct net_bridge *br,
537 u16 newprio);
14f98f25 538extern int br_stp_set_port_priority(struct net_bridge_port *p,
539 unsigned long newprio);
540extern int br_stp_set_path_cost(struct net_bridge_port *p,
541 unsigned long path_cost);
1da177e4
LT		 542extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
543
544/* br_stp_bpdu.c */
7c85fbf0
PM		 545struct stp_proto;
546extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
547 struct net_device *dev);
1da177e4
LT		 548
549/* br_stp_timer.c */
550extern void br_stp_timer_init(struct net_bridge *br);
551extern void br_stp_port_timer_init(struct net_bridge_port *p);
552extern unsigned long br_timer_value(const struct timer_list *timer);
553
554/* br.c */
e6373c4c 555#if IS_ENABLED(CONFIG_ATM_LANE)
da678292
MM		 556extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
557#endif
1da177e4 558
11dc1f36 559/* br_netlink.c */
149ddd83 560extern struct rtnl_link_ops br_link_ops;
32fe21c0 561extern int br_netlink_init(void);
11dc1f36
SH		 562extern void br_netlink_fini(void);
563extern void br_ifinfo_notify(int event, struct net_bridge_port *port);
e5a55a89
JF		 564extern int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg);
565extern int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
566 struct net_device *dev);
11dc1f36 567
1da177e4
LT		 568#ifdef CONFIG_SYSFS
569/* br_sysfs_if.c */
52cf25d0 570extern const struct sysfs_ops brport_sysfs_ops;
1da177e4 571extern int br_sysfs_addif(struct net_bridge_port *p);
e0f43752 572extern int br_sysfs_renameif(struct net_bridge_port *p);
1da177e4
LT		 573
574/* br_sysfs_br.c */
575extern int br_sysfs_addbr(struct net_device *dev);
576extern void br_sysfs_delbr(struct net_device *dev);
577
578#else
579
0cb2bbbe
LJ		 580static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
581static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
582static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
583static inline void br_sysfs_delbr(struct net_device *dev) { return; }
1da177e4
LT		 584#endif /* CONFIG_SYSFS */
585
586#endif
Linux 6.x block layer and io_uring tree(s)