br_private.h 14.8 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 32 33
#define BR_VERSION	"2.3"

/* Path to usermode spanning tree program */
#define BR_STP_PROG	"/sbin/bridge-stp"
S
Stephen Hemminger 已提交
34

L
Linus Torvalds 已提交
35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
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];
};

50 51 52 53
struct br_ip
{
	union {
		__be32	ip4;
54 55 56
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
		struct in6_addr ip6;
#endif
57 58 59 60
	} u;
	__be16		proto;
};

L
Linus Torvalds 已提交
61 62 63 64 65 66 67 68 69 70 71 72
struct net_bridge_fdb_entry
{
	struct hlist_node		hlist;
	struct net_bridge_port		*dst;

	struct rcu_head			rcu;
	unsigned long			ageing_timer;
	mac_addr			addr;
	unsigned char			is_local;
	unsigned char			is_static;
};

73 74
struct net_bridge_port_group {
	struct net_bridge_port		*port;
75
	struct net_bridge_port_group __rcu *next;
76 77 78 79
	struct hlist_node		mglist;
	struct rcu_head			rcu;
	struct timer_list		timer;
	struct timer_list		query_timer;
80
	struct br_ip			addr;
81 82 83 84 85 86 87
	u32				queries_sent;
};

struct net_bridge_mdb_entry
{
	struct hlist_node		hlist[2];
	struct net_bridge		*br;
88
	struct net_bridge_port_group __rcu *ports;
89 90 91
	struct rcu_head			rcu;
	struct timer_list		timer;
	struct timer_list		query_timer;
92
	struct br_ip			addr;
93
	bool				mglist;
94 95 96 97 98 99 100 101 102 103 104 105 106 107
	u32				queries_sent;
};

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
108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
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;

	struct timer_list		forward_delay_timer;
	struct timer_list		hold_timer;
	struct timer_list		message_age_timer;
	struct kobject			kobj;
	struct rcu_head			rcu;
132 133 134

	unsigned long 			flags;
#define BR_HAIRPIN_MODE		0x00000001
135 136 137 138 139 140 141 142 143

#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
144 145 146 147

#ifdef CONFIG_SYSFS
	char				sysfs_name[IFNAMSIZ];
#endif
H
Herbert Xu 已提交
148 149 150 151

#ifdef CONFIG_NET_POLL_CONTROLLER
	struct netpoll			*np;
#endif
L
Linus Torvalds 已提交
152 153
};

154 155
#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)

156 157 158 159 160 161
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;
}

162
static inline struct net_bridge_port *br_port_get_rtnl(struct net_device *dev)
163
{
164 165
	return br_port_exists(dev) ?
		rtnl_dereference(dev->rx_handler_data) : NULL;
166 167
}

168
struct br_cpu_netstats {
E
Eric Dumazet 已提交
169 170 171 172 173
	u64			rx_packets;
	u64			rx_bytes;
	u64			tx_packets;
	u64			tx_bytes;
	struct u64_stats_sync	syncp;
174 175
};

L
Linus Torvalds 已提交
176 177 178 179 180
struct net_bridge
{
	spinlock_t			lock;
	struct list_head		port_list;
	struct net_device		*dev;
181

182
	struct br_cpu_netstats __percpu *stats;
L
Linus Torvalds 已提交
183 184
	spinlock_t			hash_lock;
	struct hlist_head		hash[BR_HASH_SIZE];
185
	u32				feature_mask;
186 187
#ifdef CONFIG_BRIDGE_NETFILTER
	struct rtable 			fake_rtable;
188 189 190
	bool				nf_call_iptables;
	bool				nf_call_ip6tables;
	bool				nf_call_arptables;
191
#endif
192 193
	unsigned long			flags;
#define BR_SET_MAC_ADDR		0x00000001
L
Linus Torvalds 已提交
194 195 196 197 198 199 200 201 202 203 204 205 206

	/* 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;

207
	u8				group_addr[ETH_ALEN];
L
Linus Torvalds 已提交
208
	u16				root_port;
209 210 211 212 213 214 215

	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
216 217 218
	unsigned char			topology_change;
	unsigned char			topology_change_detected;

219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	unsigned char			multicast_router;

	u8				multicast_disabled:1;

	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;
239
	struct net_bridge_mdb_htable __rcu *mdb;
240 241 242 243 244 245 246
	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
247 248 249 250
	struct timer_list		hello_timer;
	struct timer_list		tcn_timer;
	struct timer_list		topology_change_timer;
	struct timer_list		gc_timer;
251
	struct kobject			*ifobj;
L
Linus Torvalds 已提交
252 253
};

254 255
struct br_input_skb_cb {
	struct net_device *brdev;
256
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
257 258
	int igmp;
	int mrouters_only;
259
#endif
260 261 262 263
};

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

264 265 266 267 268 269
#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

270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
#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
285
extern struct notifier_block br_device_notifier;
286
extern const u8 br_group_address[ETH_ALEN];
L
Linus Torvalds 已提交
287 288 289 290 291 292 293 294 295

/* 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);
296 297
extern netdev_tx_t br_dev_xmit(struct sk_buff *skb,
			       struct net_device *dev);
S
stephen hemminger 已提交
298
#ifdef CONFIG_NET_POLL_CONTROLLER
H
Herbert Xu 已提交
299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314
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
315
#else
H
Herbert Xu 已提交
316 317 318 319 320
static inline struct netpoll_info *br_netpoll_info(struct net_bridge *br)
{
	return NULL;
}

321
static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
H
Herbert Xu 已提交
322 323 324
				       struct sk_buff *skb)
{
}
S
stephen hemminger 已提交
325

H
Herbert Xu 已提交
326 327 328 329 330 331 332 333
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
334
#endif
L
Linus Torvalds 已提交
335 336

/* br_fdb.c */
337
extern int br_fdb_init(void);
L
Linus Torvalds 已提交
338
extern void br_fdb_fini(void);
339
extern void br_fdb_flush(struct net_bridge *br);
L
Linus Torvalds 已提交
340 341 342 343
extern void br_fdb_changeaddr(struct net_bridge_port *p,
			      const unsigned char *newaddr);
extern void br_fdb_cleanup(unsigned long arg);
extern void br_fdb_delete_by_port(struct net_bridge *br,
344
				  const struct net_bridge_port *p, int do_all);
L
Linus Torvalds 已提交
345 346
extern struct net_bridge_fdb_entry *__br_fdb_get(struct net_bridge *br,
						 const unsigned char *addr);
347
extern int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
348
extern int br_fdb_fillbuf(struct net_bridge *br, void *buf,
L
Linus Torvalds 已提交
349 350 351 352 353 354 355 356 357 358 359 360 361
			  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);

/* 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,
362
		struct sk_buff *skb, struct sk_buff *skb0);
L
Linus Torvalds 已提交
363
extern int br_forward_finish(struct sk_buff *skb);
364
extern void br_flood_deliver(struct net_bridge *br, struct sk_buff *skb);
365 366
extern void br_flood_forward(struct net_bridge *br, struct sk_buff *skb,
			     struct sk_buff *skb2);
L
Linus Torvalds 已提交
367 368

/* br_if.c */
369
extern void br_port_carrier_check(struct net_bridge_port *p);
370 371
extern int br_add_bridge(struct net *net, const char *name);
extern int br_del_bridge(struct net *net, const char *name);
372
extern void br_net_exit(struct net *net);
L
Linus Torvalds 已提交
373 374 375 376 377
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);
378
extern void br_features_recompute(struct net_bridge *br);
L
Linus Torvalds 已提交
379 380 381

/* br_input.c */
extern int br_handle_frame_finish(struct sk_buff *skb);
382
extern rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
L
Linus Torvalds 已提交
383 384 385

/* br_ioctl.c */
extern int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
386
extern int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd, void __user *arg);
L
Linus Torvalds 已提交
387

388 389 390 391 392 393 394 395 396 397 398 399 400 401
/* 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);
402 403 404 405
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);
406 407 408
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);
409
extern int br_multicast_toggle(struct net_bridge *br, unsigned long val);
410
extern int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
411 412 413 414 415 416 417

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));
}
418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458
#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)
{
}
459 460 461 462 463 464 465 466 467 468 469

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)
{
}
470 471
static inline bool br_multicast_is_router(struct net_bridge *br)
{
472
	return 0;
473
}
474
#endif
475

L
Linus Torvalds 已提交
476
/* br_netfilter.c */
477
#ifdef CONFIG_BRIDGE_NETFILTER
L
Linus Torvalds 已提交
478 479
extern int br_netfilter_init(void);
extern void br_netfilter_fini(void);
480
extern void br_netfilter_rtable_init(struct net_bridge *);
481 482 483
#else
#define br_netfilter_init()	(0)
#define br_netfilter_fini()	do { } while(0)
484
#define br_netfilter_rtable_init(x)
485
#endif
L
Linus Torvalds 已提交
486 487 488 489

/* 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,
490
					   u16 port_no);
L
Linus Torvalds 已提交
491 492 493 494 495 496
extern void br_init_port(struct net_bridge_port *p);
extern void br_become_designated_port(struct net_bridge_port *p);

/* br_stp_if.c */
extern void br_stp_enable_bridge(struct net_bridge *br);
extern void br_stp_disable_bridge(struct net_bridge *br);
497
extern void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
L
Linus Torvalds 已提交
498 499
extern void br_stp_enable_port(struct net_bridge_port *p);
extern void br_stp_disable_port(struct net_bridge_port *p);
500
extern bool br_stp_recalculate_bridge_id(struct net_bridge *br);
501
extern void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
L
Linus Torvalds 已提交
502 503 504 505 506 507 508 509 510
extern void br_stp_set_bridge_priority(struct net_bridge *br,
				       u16 newprio);
extern void br_stp_set_port_priority(struct net_bridge_port *p,
				     u8 newprio);
extern void br_stp_set_path_cost(struct net_bridge_port *p,
				 u32 path_cost);
extern ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);

/* br_stp_bpdu.c */
P
Patrick McHardy 已提交
511 512 513
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
514 515 516 517 518 519 520

/* 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 */
521 522 523
#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
#endif
L
Linus Torvalds 已提交
524

525
/* br_netlink.c */
526
extern int br_netlink_init(void);
527 528 529
extern void br_netlink_fini(void);
extern void br_ifinfo_notify(int event, struct net_bridge_port *port);

L
Linus Torvalds 已提交
530 531
#ifdef CONFIG_SYSFS
/* br_sysfs_if.c */
532
extern const struct sysfs_ops brport_sysfs_ops;
L
Linus Torvalds 已提交
533
extern int br_sysfs_addif(struct net_bridge_port *p);
534
extern int br_sysfs_renameif(struct net_bridge_port *p);
L
Linus Torvalds 已提交
535 536 537 538 539 540 541 542

/* 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)
543
#define br_sysfs_renameif(p)	(0)
L
Linus Torvalds 已提交
544 545 546 547 548
#define br_sysfs_addbr(dev)	(0)
#define br_sysfs_delbr(dev)	do { } while(0)
#endif /* CONFIG_SYSFS */

#endif