br_private.h 15.7 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
/*
 *	Linux ethernet bridge
 *
 *	Authors:
 *	Lennert Buytenhek		<buytenh@gnu.org>
 *
 *	This program is free software; you can redistribute it and/or
 *	modify it under the terms of the GNU General Public License
 *	as published by the Free Software Foundation; either version
 *	2 of the License, or (at your option) any later version.
 */

#ifndef _BR_PRIVATE_H
#define _BR_PRIVATE_H

#include <linux/netdevice.h>
#include <linux/if_bridge.h>
H
Herbert Xu 已提交
18
#include <linux/netpoll.h>
E
Eric Dumazet 已提交
19
#include <linux/u64_stats_sync.h>
20
#include <net/route.h>
L
Linus Torvalds 已提交
21 22 23 24 25 26 27 28 29

#define BR_HASH_BITS 8
#define BR_HASH_SIZE (1 << BR_HASH_BITS)

#define BR_HOLD_TIME (1*HZ)

#define BR_PORT_BITS	10
#define BR_MAX_PORTS	(1<<BR_PORT_BITS)

30 31
#define BR_VERSION	"2.3"

32 33 34 35 36
/* Control of forwarding link local multicast */
#define BR_GROUPFWD_DEFAULT	0
/* Don't allow forwarding control protocols like STP and LLDP */
#define BR_GROUPFWD_RESTRICTED	0x4007u

37 38
/* Path to usermode spanning tree program */
#define BR_STP_PROG	"/sbin/bridge-stp"
S
Stephen Hemminger 已提交
39

L
Linus Torvalds 已提交
40 41 42 43 44 45 46 47 48 49 50 51 52 53 54
typedef struct bridge_id bridge_id;
typedef struct mac_addr mac_addr;
typedef __u16 port_id;

struct bridge_id
{
	unsigned char	prio[2];
	unsigned char	addr[6];
};

struct mac_addr
{
	unsigned char	addr[6];
};

55 56 57 58
struct br_ip
{
	union {
		__be32	ip4;
E
Eric Dumazet 已提交
59
#if IS_ENABLED(CONFIG_IPV6)
60 61
		struct in6_addr ip6;
#endif
62 63 64 65
	} u;
	__be16		proto;
};

L
Linus Torvalds 已提交
66 67 68 69 70 71
struct net_bridge_fdb_entry
{
	struct hlist_node		hlist;
	struct net_bridge_port		*dst;

	struct rcu_head			rcu;
72 73
	unsigned long			updated;
	unsigned long			used;
L
Linus Torvalds 已提交
74 75 76 77 78
	mac_addr			addr;
	unsigned char			is_local;
	unsigned char			is_static;
};

79 80
struct net_bridge_port_group {
	struct net_bridge_port		*port;
81
	struct net_bridge_port_group __rcu *next;
82 83 84
	struct hlist_node		mglist;
	struct rcu_head			rcu;
	struct timer_list		timer;
85
	struct br_ip			addr;
86 87 88 89 90 91
};

struct net_bridge_mdb_entry
{
	struct hlist_node		hlist[2];
	struct net_bridge		*br;
92
	struct net_bridge_port_group __rcu *ports;
93 94
	struct rcu_head			rcu;
	struct timer_list		timer;
95
	struct br_ip			addr;
96
	bool				mglist;
97 98 99 100 101 102 103 104 105 106 107 108 109
};

struct net_bridge_mdb_htable
{
	struct hlist_head		*mhash;
	struct rcu_head			rcu;
	struct net_bridge_mdb_htable	*old;
	u32				size;
	u32				max;
	u32				secret;
	u32				ver;
};

L
Linus Torvalds 已提交
110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127
struct net_bridge_port
{
	struct net_bridge		*br;
	struct net_device		*dev;
	struct list_head		list;

	/* STP */
	u8				priority;
	u8				state;
	u16				port_no;
	unsigned char			topology_change_ack;
	unsigned char			config_pending;
	port_id				port_id;
	port_id				designated_port;
	bridge_id			designated_root;
	bridge_id			designated_bridge;
	u32				path_cost;
	u32				designated_cost;
128
	unsigned long			designated_age;
L
Linus Torvalds 已提交
129 130 131 132 133 134

	struct timer_list		forward_delay_timer;
	struct timer_list		hold_timer;
	struct timer_list		message_age_timer;
	struct kobject			kobj;
	struct rcu_head			rcu;
135 136 137

	unsigned long 			flags;
#define BR_HAIRPIN_MODE		0x00000001
138 139 140 141 142 143 144 145 146

#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	u32				multicast_startup_queries_sent;
	unsigned char			multicast_router;
	struct timer_list		multicast_router_timer;
	struct timer_list		multicast_query_timer;
	struct hlist_head		mglist;
	struct hlist_node		rlist;
#endif
147 148 149 150

#ifdef CONFIG_SYSFS
	char				sysfs_name[IFNAMSIZ];
#endif
H
Herbert Xu 已提交
151 152 153 154

#ifdef CONFIG_NET_POLL_CONTROLLER
	struct netpoll			*np;
#endif
L
Linus Torvalds 已提交
155 156
};

157 158
#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)

159 160 161 162 163 164
static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
{
	struct net_bridge_port *port = rcu_dereference(dev->rx_handler_data);
	return br_port_exists(dev) ? port : NULL;
}

165
static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
166
{
167 168
	return br_port_exists(dev) ?
		rtnl_dereference(dev->rx_handler_data) : NULL;
169 170
}

171
struct br_cpu_netstats {
E
Eric Dumazet 已提交
172 173 174 175 176
	u64			rx_packets;
	u64			rx_bytes;
	u64			tx_packets;
	u64			tx_bytes;
	struct u64_stats_sync	syncp;
177 178
};

L
Linus Torvalds 已提交
179 180 181 182 183
struct net_bridge
{
	spinlock_t			lock;
	struct list_head		port_list;
	struct net_device		*dev;
184

185
	struct br_cpu_netstats __percpu *stats;
L
Linus Torvalds 已提交
186 187
	spinlock_t			hash_lock;
	struct hlist_head		hash[BR_HASH_SIZE];
188 189
#ifdef CONFIG_BRIDGE_NETFILTER
	struct rtable 			fake_rtable;
190 191 192
	bool				nf_call_iptables;
	bool				nf_call_ip6tables;
	bool				nf_call_arptables;
193
#endif
194 195
	unsigned long			flags;
#define BR_SET_MAC_ADDR		0x00000001
L
Linus Torvalds 已提交
196

197 198
	u16				group_fwd_mask;

L
Linus Torvalds 已提交
199 200 201 202 203 204 205 206 207 208 209 210
	/* STP */
	bridge_id			designated_root;
	bridge_id			bridge_id;
	u32				root_path_cost;
	unsigned long			max_age;
	unsigned long			hello_time;
	unsigned long			forward_delay;
	unsigned long			bridge_max_age;
	unsigned long			ageing_time;
	unsigned long			bridge_hello_time;
	unsigned long			bridge_forward_delay;

211
	u8				group_addr[ETH_ALEN];
L
Linus Torvalds 已提交
212
	u16				root_port;
213 214 215 216 217 218 219

	enum {
		BR_NO_STP, 		/* no spanning tree */
		BR_KERNEL_STP,		/* old STP in kernel */
		BR_USER_STP,		/* new RSTP in userspace */
	} stp_enabled;

L
Linus Torvalds 已提交
220 221 222
	unsigned char			topology_change;
	unsigned char			topology_change_detected;

223 224 225 226
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	unsigned char			multicast_router;

	u8				multicast_disabled:1;
227
	u8				multicast_querier:1;
228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243

	u32				hash_elasticity;
	u32				hash_max;

	u32				multicast_last_member_count;
	u32				multicast_startup_queries_sent;
	u32				multicast_startup_query_count;

	unsigned long			multicast_last_member_interval;
	unsigned long			multicast_membership_interval;
	unsigned long			multicast_querier_interval;
	unsigned long			multicast_query_interval;
	unsigned long			multicast_query_response_interval;
	unsigned long			multicast_startup_query_interval;

	spinlock_t			multicast_lock;
244
	struct net_bridge_mdb_htable __rcu *mdb;
245 246 247 248 249 250 251
	struct hlist_head		router_list;

	struct timer_list		multicast_router_timer;
	struct timer_list		multicast_querier_timer;
	struct timer_list		multicast_query_timer;
#endif

L
Linus Torvalds 已提交
252 253 254 255
	struct timer_list		hello_timer;
	struct timer_list		tcn_timer;
	struct timer_list		topology_change_timer;
	struct timer_list		gc_timer;
256
	struct kobject			*ifobj;
L
Linus Torvalds 已提交
257 258
};

259 260
struct br_input_skb_cb {
	struct net_device *brdev;
261
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
262 263
	int igmp;
	int mrouters_only;
264
#endif
265 266 267 268
};

#define BR_INPUT_SKB_CB(__skb)	((struct br_input_skb_cb *)(__skb)->cb)

269 270 271 272 273 274
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(BR_INPUT_SKB_CB(__skb)->mrouters_only)
#else
# define BR_INPUT_SKB_CB_MROUTERS_ONLY(__skb)	(0)
#endif

275 276 277 278 279 280 281 282 283 284 285 286 287 288 289
#define br_printk(level, br, format, args...)	\
	printk(level "%s: " format, (br)->dev->name, ##args)

#define br_err(__br, format, args...)			\
	br_printk(KERN_ERR, __br, format, ##args)
#define br_warn(__br, format, args...)			\
	br_printk(KERN_WARNING, __br, format, ##args)
#define br_notice(__br, format, args...)		\
	br_printk(KERN_NOTICE, __br, format, ##args)
#define br_info(__br, format, args...)			\
	br_printk(KERN_INFO, __br, format, ##args)

#define br_debug(br, format, args...)			\
	pr_debug("%s: " format,  (br)->dev->name, ##args)

L
Linus Torvalds 已提交
290
extern struct notifier_block br_device_notifier;
291
extern const u8 br_group_address[ETH_ALEN];
L
Linus Torvalds 已提交
292 293 294 295 296 297 298 299 300

/* called under bridge lock */
static inline int br_is_root_bridge(const struct net_bridge *br)
{
	return !memcmp(&br->bridge_id, &br->designated_root, 8);
}

/* br_device.c */
extern void br_dev_setup(struct net_device *dev);
301
extern void br_dev_delete(struct net_device *dev, struct list_head *list);
302 303
extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
			       struct net_device *dev);
S
stephen hemminger 已提交
304
#ifdef CONFIG_NET_POLL_CONTROLLER
H
Herbert Xu 已提交
305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320
static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
{
	return br->dev->npinfo;
}

static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
				       struct sk_buff *skb)
{
	struct netpoll *np = p->np;

	if (np)
		netpoll_send_skb(np, skb);
}

extern int br_netpoll_enable(struct net_bridge_port *p);
extern void br_netpoll_disable(struct net_bridge_port *p);
S
stephen hemminger 已提交
321
#else
H
Herbert Xu 已提交
322 323 324 325 326
static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
{
	return NULL;
}

327
static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
H
Herbert Xu 已提交
328 329 330
				       struct sk_buff *skb)
{
}
S
stephen hemminger 已提交
331

H
Herbert Xu 已提交
332 333 334 335 336 337 338 339
static inline int br_netpoll_enable(struct net_bridge_port *p)
{
	return 0;
}

static inline void br_netpoll_disable(struct net_bridge_port *p)
{
}
S
stephen hemminger 已提交
340
#endif
L
Linus Torvalds 已提交
341 342

/* br_fdb.c */
343
extern int br_fdb_init(void);
L
Linus Torvalds 已提交
344
extern void br_fdb_fini(void);
345
extern void br_fdb_flush(struct net_bridge *br);
L
Linus Torvalds 已提交
346 347
extern void br_fdb_changeaddr(struct net_bridge_port *p,
			      const unsigned char *newaddr);
348
extern void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
L
Linus Torvalds 已提交
349 350
extern void br_fdb_cleanup(unsigned long arg);
extern void br_fdb_delete_by_port(struct net_bridge *br,
351
				  const struct net_bridge_port *p, int do_all);
L
Linus Torvalds 已提交
352 353
extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
						 const unsigned char *addr);
354
extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
355
extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
L
Linus Torvalds 已提交
356 357 358 359 360 361 362
			  unsigned long count, unsigned long off);
extern int br_fdb_insert(struct net_bridge *br,
			 struct net_bridge_port *source,
			 const unsigned char *addr);
extern void br_fdb_update(struct net_bridge *br,
			  struct net_bridge_port *source,
			  const unsigned char *addr);
363 364 365 366 367 368 369 370 371 372 373 374

extern int br_fdb_delete(struct ndmsg *ndm,
			 struct net_device *dev,
			 unsigned char *addr);
extern int br_fdb_add(struct ndmsg *nlh,
		      struct net_device *dev,
		      unsigned char *addr,
		      u16 nlh_flags);
extern int br_fdb_dump(struct sk_buff *skb,
		       struct netlink_callback *cb,
		       struct net_device *dev,
		       int idx);
L
Linus Torvalds 已提交
375 376 377 378 379 380

/* br_forward.c */
extern void br_deliver(const struct net_bridge_port *to,
		struct sk_buff *skb);
extern int br_dev_queue_push_xmit(struct sk_buff *skb);
extern void br_forward(const struct net_bridge_port *to,
381
		struct sk_buff *skb, struct sk_buff *skb0);
L
Linus Torvalds 已提交
382
extern int br_forward_finish(struct sk_buff *skb);
383
extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
384 385
extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
			     struct sk_buff *skb2);
L
Linus Torvalds 已提交
386 387

/* br_if.c */
388
extern void br_port_carrier_check(struct net_bridge_port *p);
389 390
extern int br_add_bridge(struct net *net, const char *name);
extern int br_del_bridge(struct net *net, const char *name);
391
extern void br_net_exit(struct net *net);
L
Linus Torvalds 已提交
392 393 394 395 396
extern int br_add_if(struct net_bridge *br,
	      struct net_device *dev);
extern int br_del_if(struct net_bridge *br,
	      struct net_device *dev);
extern int br_min_mtu(const struct net_bridge *br);
397 398
extern netdev_features_t br_features_recompute(struct net_bridge *br,
	netdev_features_t features);
L
Linus Torvalds 已提交
399 400 401

/* br_input.c */
extern int br_handle_frame_finish(struct sk_buff *skb);
402
extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
L
Linus Torvalds 已提交
403 404 405

/* br_ioctl.c */
extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
406
extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
L
Linus Torvalds 已提交
407

408 409 410 411 412 413 414 415 416 417 418 419 420 421
/* br_multicast.c */
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
extern int br_multicast_rcv(struct net_bridge *br,
			    struct net_bridge_port *port,
			    struct sk_buff *skb);
extern struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
					       struct sk_buff *skb);
extern void br_multicast_add_port(struct net_bridge_port *port);
extern void br_multicast_del_port(struct net_bridge_port *port);
extern void br_multicast_enable_port(struct net_bridge_port *port);
extern void br_multicast_disable_port(struct net_bridge_port *port);
extern void br_multicast_init(struct net_bridge *br);
extern void br_multicast_open(struct net_bridge *br);
extern void br_multicast_stop(struct net_bridge *br);
422 423 424 425
extern void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
				 struct sk_buff *skb);
extern void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
				 struct sk_buff *skb, struct sk_buff *skb2);
426 427 428
extern int br_multicast_set_router(struct net_bridge *br, unsigned long val);
extern int br_multicast_set_port_router(struct net_bridge_port *p,
					unsigned long val);
429
extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
430
extern int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
431
extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
432 433 434 435 436 437 438

static inline bool br_multicast_is_router(struct net_bridge *br)
{
	return br->multicast_router == 2 ||
	       (br->multicast_router == 1 &&
		timer_pending(&br->multicast_router_timer));
}
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
#else
static inline int br_multicast_rcv(struct net_bridge *br,
				   struct net_bridge_port *port,
				   struct sk_buff *skb)
{
	return 0;
}

static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
						      struct sk_buff *skb)
{
	return NULL;
}

static inline void br_multicast_add_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_del_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_enable_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_disable_port(struct net_bridge_port *port)
{
}

static inline void br_multicast_init(struct net_bridge *br)
{
}

static inline void br_multicast_open(struct net_bridge *br)
{
}

static inline void br_multicast_stop(struct net_bridge *br)
{
}
480 481 482 483 484 485 486 487 488 489 490

static inline void br_multicast_deliver(struct net_bridge_mdb_entry *mdst,
					struct sk_buff *skb)
{
}

static inline void br_multicast_forward(struct net_bridge_mdb_entry *mdst,
					struct sk_buff *skb,
					struct sk_buff *skb2)
{
}
491 492
static inline bool br_multicast_is_router(struct net_bridge *br)
{
493
	return 0;
494
}
495
#endif
496

L
Linus Torvalds 已提交
497
/* br_netfilter.c */
498
#ifdef CONFIG_BRIDGE_NETFILTER
L
Linus Torvalds 已提交
499 500
extern int br_netfilter_init(void);
extern void br_netfilter_fini(void);
501
extern void br_netfilter_rtable_init(struct net_bridge *);
502 503 504
#else
#define br_netfilter_init()	(0)
#define br_netfilter_fini()	do { } while(0)
505
#define br_netfilter_rtable_init(x)
506
#endif
L
Linus Torvalds 已提交
507 508 509 510

/* br_stp.c */
extern void br_log_state(const struct net_bridge_port *p);
extern struct net_bridge_port *br_get_port(struct net_bridge *br,
511
					   u16 port_no);
L
Linus Torvalds 已提交
512 513 514
extern void br_init_port(struct net_bridge_port *p);
extern void br_become_designated_port(struct net_bridge_port *p);

515 516 517 518 519
extern int br_set_forward_delay(struct net_bridge *br, unsigned long x);
extern int br_set_hello_time(struct net_bridge *br, unsigned long x);
extern int br_set_max_age(struct net_bridge *br, unsigned long x);


L
Linus Torvalds 已提交
520 521 522
/* br_stp_if.c */
extern void br_stp_enable_bridge(struct net_bridge *br);
extern void br_stp_disable_bridge(struct net_bridge *br);
523
extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
L
Linus Torvalds 已提交
524 525
extern void br_stp_enable_port(struct net_bridge_port *p);
extern void br_stp_disable_port(struct net_bridge_port *p);
526
extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
527
extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
L
Linus Torvalds 已提交
528 529
extern void br_stp_set_bridge_priority(struct net_bridge *br,
				       u16 newprio);
530 531 532 533
extern int br_stp_set_port_priority(struct net_bridge_port *p,
				    unsigned long newprio);
extern int br_stp_set_path_cost(struct net_bridge_port *p,
				unsigned long path_cost);
L
Linus Torvalds 已提交
534 535 536
extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);

/* br_stp_bpdu.c */
P
Patrick McHardy 已提交
537 538 539
struct stp_proto;
extern void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
		       struct net_device *dev);
L
Linus Torvalds 已提交
540 541 542 543 544 545 546

/* br_stp_timer.c */
extern void br_stp_timer_init(struct net_bridge *br);
extern void br_stp_port_timer_init(struct net_bridge_port *p);
extern unsigned long br_timer_value(const struct timer_list *timer);

/* br.c */
I
Igor Maravić 已提交
547
#if IS_ENABLED(CONFIG_ATM_LANE)
548 549
extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
#endif
L
Linus Torvalds 已提交
550

551
/* br_netlink.c */
552
extern int br_netlink_init(void);
553 554 555
extern void br_netlink_fini(void);
extern void br_ifinfo_notify(int event, struct net_bridge_port *port);

L
Linus Torvalds 已提交
556 557
#ifdef CONFIG_SYSFS
/* br_sysfs_if.c */
558
extern const struct sysfs_ops brport_sysfs_ops;
L
Linus Torvalds 已提交
559
extern int br_sysfs_addif(struct net_bridge_port *p);
560
extern int br_sysfs_renameif(struct net_bridge_port *p);
L
Linus Torvalds 已提交
561 562 563 564 565 566 567 568

/* br_sysfs_br.c */
extern int br_sysfs_addbr(struct net_device *dev);
extern void br_sysfs_delbr(struct net_device *dev);

#else

#define br_sysfs_addif(p)	(0)
569
#define br_sysfs_renameif(p)	(0)
L
Linus Torvalds 已提交
570 571 572 573 574
#define br_sysfs_addbr(dev)	(0)
#define br_sysfs_delbr(dev)	do { } while(0)
#endif /* CONFIG_SYSFS */

#endif