br_private.h 32.4 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>
21
#include <net/ip6_fib.h>
22
#include <linux/if_vlan.h>
23
#include <linux/rhashtable.h>
24
#include <linux/refcount.h>
L
Linus Torvalds 已提交
25 26 27 28 29 30 31 32 33

#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)

34 35
#define BR_VERSION	"2.3"

36 37
/* Control of forwarding link local multicast */
#define BR_GROUPFWD_DEFAULT	0
38
/* Don't allow forwarding of control protocols like STP, MAC PAUSE and LACP */
39 40 41 42 43 44 45 46
enum {
	BR_GROUPFWD_STP		= BIT(0),
	BR_GROUPFWD_MACPAUSE	= BIT(1),
	BR_GROUPFWD_LACP	= BIT(2),
};

#define BR_GROUPFWD_RESTRICTED (BR_GROUPFWD_STP | BR_GROUPFWD_MACPAUSE | \
				BR_GROUPFWD_LACP)
47 48
/* The Nearest Customer Bridge Group Address, 01-80-C2-00-00-[00,0B,0C,0D,0F] */
#define BR_GROUPFWD_8021AD	0xB801u
49

50 51
/* Path to usermode spanning tree program */
#define BR_STP_PROG	"/sbin/bridge-stp"
S
Stephen Hemminger 已提交
52

L
Linus Torvalds 已提交
53 54 55 56 57 58 59
typedef struct bridge_id bridge_id;
typedef struct mac_addr mac_addr;
typedef __u16 port_id;

struct bridge_id
{
	unsigned char	prio[2];
60
	unsigned char	addr[ETH_ALEN];
L
Linus Torvalds 已提交
61 62 63 64
};

struct mac_addr
{
65
	unsigned char	addr[ETH_ALEN];
L
Linus Torvalds 已提交
66 67
};

68 69
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
/* our own querier */
70
struct bridge_mcast_own_query {
71 72 73 74 75
	struct timer_list	timer;
	u32			startup_sent;
};

/* other querier */
76
struct bridge_mcast_other_query {
77 78 79
	struct timer_list		timer;
	unsigned long			delay_time;
};
80 81 82 83

/* selected querier */
struct bridge_mcast_querier {
	struct br_ip addr;
84
	struct net_bridge_port __rcu	*port;
85
};
86 87 88 89 90 91

/* IGMP/MLD statistics */
struct bridge_mcast_stats {
	struct br_mcast_stats mstats;
	struct u64_stats_sync syncp;
};
92 93
#endif

94 95 96 97 98 99 100 101
struct br_vlan_stats {
	u64 rx_bytes;
	u64 rx_packets;
	u64 tx_bytes;
	u64 tx_packets;
	struct u64_stats_sync syncp;
};

102 103 104 105 106
struct br_tunnel_info {
	__be64			tunnel_id;
	struct metadata_dst	*tunnel_dst;
};

107 108 109 110 111 112
/**
 * struct net_bridge_vlan - per-vlan entry
 *
 * @vnode: rhashtable member
 * @vid: VLAN id
 * @flags: bridge vlan flags
113
 * @stats: per-cpu VLAN statistics
114 115 116 117 118 119 120 121 122 123 124 125 126 127 128
 * @br: if MASTER flag set, this points to a bridge struct
 * @port: if MASTER flag unset, this points to a port struct
 * @refcnt: if MASTER flag set, this is bumped for each port referencing it
 * @brvlan: if MASTER flag unset, this points to the global per-VLAN context
 *          for this VLAN entry
 * @vlist: sorted list of VLAN entries
 * @rcu: used for entry destruction
 *
 * This structure is shared between the global per-VLAN entries contained in
 * the bridge rhashtable and the local per-port per-VLAN entries contained in
 * the port's rhashtable. The union entries should be interpreted depending on
 * the entry flags that are set.
 */
struct net_bridge_vlan {
	struct rhash_head		vnode;
129
	struct rhash_head		tnode;
130 131
	u16				vid;
	u16				flags;
132
	struct br_vlan_stats __percpu	*stats;
133
	union {
134 135 136 137
		struct net_bridge	*br;
		struct net_bridge_port	*port;
	};
	union {
138
		refcount_t		refcnt;
139 140
		struct net_bridge_vlan	*brvlan;
	};
141 142 143

	struct br_tunnel_info		tinfo;

144 145
	struct list_head		vlist;

146
	struct rcu_head			rcu;
147 148 149 150 151 152 153 154
};

/**
 * struct net_bridge_vlan_group
 *
 * @vlan_hash: VLAN entry rhashtable
 * @vlan_list: sorted VLAN entry list
 * @num_vlans: number of total VLAN entries
155
 * @pvid: PVID VLAN id
156 157 158 159 160 161 162 163 164
 *
 * IMPORTANT: Be careful when checking if there're VLAN entries using list
 *            primitives because the bridge can have entries in its list which
 *            are just for global context but not for filtering, i.e. they have
 *            the master flag set but not the brentry flag. If you have to check
 *            if there're "real" entries in the bridge please test @num_vlans
 */
struct net_bridge_vlan_group {
	struct rhashtable		vlan_hash;
165
	struct rhashtable		tunnel_hash;
166
	struct list_head		vlan_list;
167
	u16				num_vlans;
168
	u16				pvid;
169 170
};

171 172 173 174 175
struct net_bridge_fdb_key {
	mac_addr addr;
	u16 vlan_id;
};

176
struct net_bridge_fdb_entry {
177
	struct rhash_head		rhnode;
L
Linus Torvalds 已提交
178 179
	struct net_bridge_port		*dst;

180 181
	struct net_bridge_fdb_key	key;
	struct hlist_node		fdb_node;
182 183
	unsigned char			is_local:1,
					is_static:1,
184
					added_by_user:1,
185 186
					added_by_external_learn:1,
					offloaded:1;
187 188 189 190 191

	/* write-heavy members should not affect lookups */
	unsigned long			updated ____cacheline_aligned_in_smp;
	unsigned long			used;

192
	struct rcu_head			rcu;
L
Linus Torvalds 已提交
193 194
};

195 196 197
#define MDB_PG_FLAGS_PERMANENT	BIT(0)
#define MDB_PG_FLAGS_OFFLOAD	BIT(1)

198 199
struct net_bridge_port_group {
	struct net_bridge_port		*port;
200
	struct net_bridge_port_group __rcu *next;
201 202 203
	struct hlist_node		mglist;
	struct rcu_head			rcu;
	struct timer_list		timer;
204
	struct br_ip			addr;
205
	unsigned char			flags;
F
Felix Fietkau 已提交
206
	unsigned char			eth_addr[ETH_ALEN];
207 208 209 210 211 212
};

struct net_bridge_mdb_entry
{
	struct hlist_node		hlist[2];
	struct net_bridge		*br;
213
	struct net_bridge_port_group __rcu *ports;
214 215
	struct rcu_head			rcu;
	struct timer_list		timer;
216
	struct br_ip			addr;
217
	bool				host_joined;
218 219 220 221 222 223 224 225 226 227 228 229 230
};

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;
};

231
struct net_bridge_port {
L
Linus Torvalds 已提交
232 233 234 235
	struct net_bridge		*br;
	struct net_device		*dev;
	struct list_head		list;

236 237 238 239 240
	unsigned long			flags;
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
	struct net_bridge_vlan_group	__rcu *vlgrp;
#endif

L
Linus Torvalds 已提交
241 242 243 244 245 246 247 248 249 250 251 252
	/* 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;
253
	unsigned long			designated_age;
L
Linus Torvalds 已提交
254 255 256 257 258 259

	struct timer_list		forward_delay_timer;
	struct timer_list		hold_timer;
	struct timer_list		message_age_timer;
	struct kobject			kobj;
	struct rcu_head			rcu;
260

261
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
262
	struct bridge_mcast_own_query	ip4_own_query;
263
#if IS_ENABLED(CONFIG_IPV6)
264
	struct bridge_mcast_own_query	ip6_own_query;
265
#endif /* IS_ENABLED(CONFIG_IPV6) */
266
	unsigned char			multicast_router;
267
	struct bridge_mcast_stats	__percpu *mcast_stats;
268 269 270 271
	struct timer_list		multicast_router_timer;
	struct hlist_head		mglist;
	struct hlist_node		rlist;
#endif
272 273 274 275

#ifdef CONFIG_SYSFS
	char				sysfs_name[IFNAMSIZ];
#endif
H
Herbert Xu 已提交
276 277 278 279

#ifdef CONFIG_NET_POLL_CONTROLLER
	struct netpoll			*np;
#endif
280 281 282
#ifdef CONFIG_NET_SWITCHDEV
	int				offload_fwd_mark;
#endif
283
	u16				group_fwd_mask;
L
Linus Torvalds 已提交
284 285
};

286
#define br_auto_port(p) ((p)->flags & BR_AUTO_MASK)
287
#define br_promisc_port(p) ((p)->flags & BR_PROMISC)
288

289 290
#define br_port_exists(dev) (dev->priv_flags & IFF_BRIDGE_PORT)

291 292
static inline struct net_bridge_port *br_port_get_rcu(const struct net_device *dev)
{
293
	return rcu_dereference(dev->rx_handler_data);
294 295
}

296
static inline struct net_bridge_port *br_port_get_rtnl(const struct net_device *dev)
297
{
298 299
	return br_port_exists(dev) ?
		rtnl_dereference(dev->rx_handler_data) : NULL;
300 301
}

302 303 304 305 306 307
static inline struct net_bridge_port *br_port_get_rtnl_rcu(const struct net_device *dev)
{
	return br_port_exists(dev) ?
		rcu_dereference_rtnl(dev->rx_handler_data) : NULL;
}

308
struct net_bridge {
L
Linus Torvalds 已提交
309
	spinlock_t			lock;
310
	spinlock_t			hash_lock;
L
Linus Torvalds 已提交
311 312
	struct list_head		port_list;
	struct net_device		*dev;
313
	struct pcpu_sw_netstats		__percpu *stats;
314 315 316 317 318 319 320 321 322
	/* These fields are accessed on each packet */
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
	u8				vlan_enabled;
	u8				vlan_stats_enabled;
	__be16				vlan_proto;
	u16				default_pvid;
	struct net_bridge_vlan_group	__rcu *vlgrp;
#endif

323
	struct rhashtable		fdb_hash_tbl;
324
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
325 326 327 328
	union {
		struct rtable		fake_rtable;
		struct rt6_info		fake_rt6_info;
	};
329 330 331
	bool				nf_call_iptables;
	bool				nf_call_ip6tables;
	bool				nf_call_arptables;
332
#endif
333
	u16				group_fwd_mask;
334
	u16				group_fwd_mask_required;
335

L
Linus Torvalds 已提交
336 337 338 339
	/* STP */
	bridge_id			designated_root;
	bridge_id			bridge_id;
	u32				root_path_cost;
340 341 342
	unsigned char			topology_change;
	unsigned char			topology_change_detected;
	u16				root_port;
L
Linus Torvalds 已提交
343 344 345 346
	unsigned long			max_age;
	unsigned long			hello_time;
	unsigned long			forward_delay;
	unsigned long			ageing_time;
347
	unsigned long			bridge_max_age;
L
Linus Torvalds 已提交
348 349
	unsigned long			bridge_hello_time;
	unsigned long			bridge_forward_delay;
350
	unsigned long			bridge_ageing_time;
L
Linus Torvalds 已提交
351

352
	u8				group_addr[ETH_ALEN];
353
	bool				group_addr_set;
354 355 356 357 358 359 360

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

361 362 363 364
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
	unsigned char			multicast_router;

	u8				multicast_disabled:1;
365
	u8				multicast_querier:1;
366
	u8				multicast_query_use_ifaddr:1;
367
	u8				has_ipv6_addr:1;
368
	u8				multicast_stats_enabled:1;
369 370 371 372 373 374 375

	u32				hash_elasticity;
	u32				hash_max;

	u32				multicast_last_member_count;
	u32				multicast_startup_query_count;

376 377
	u8				multicast_igmp_version;

378 379 380 381 382 383 384 385
	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;
386
	struct net_bridge_mdb_htable __rcu *mdb;
387 388 389
	struct hlist_head		router_list;

	struct timer_list		multicast_router_timer;
390 391
	struct bridge_mcast_other_query	ip4_other_query;
	struct bridge_mcast_own_query	ip4_own_query;
392
	struct bridge_mcast_querier	ip4_querier;
393
	struct bridge_mcast_stats	__percpu *mcast_stats;
394
#if IS_ENABLED(CONFIG_IPV6)
395 396
	struct bridge_mcast_other_query	ip6_other_query;
	struct bridge_mcast_own_query	ip6_own_query;
397
	struct bridge_mcast_querier	ip6_querier;
398
	u8				multicast_mld_version;
399
#endif /* IS_ENABLED(CONFIG_IPV6) */
400 401
#endif

L
Linus Torvalds 已提交
402 403 404
	struct timer_list		hello_timer;
	struct timer_list		tcn_timer;
	struct timer_list		topology_change_timer;
405
	struct delayed_work		gc_work;
406
	struct kobject			*ifobj;
407
	u32				auto_cnt;
408 409 410 411

#ifdef CONFIG_NET_SWITCHDEV
	int offload_fwd_mark;
#endif
412
	bool				neigh_suppress_enabled;
413
	bool				mtu_set_by_user;
414
	struct hlist_head		fdb_list;
L
Linus Torvalds 已提交
415 416
};

417 418
struct br_input_skb_cb {
	struct net_device *brdev;
419

420
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
421 422
	int igmp;
	int mrouters_only;
423
#endif
424

425
	bool proxyarp_replied;
426

427 428 429
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
	bool vlan_filtered;
#endif
430 431 432 433

#ifdef CONFIG_NET_SWITCHDEV
	int offload_fwd_mark;
#endif
434 435 436 437
};

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

438 439 440 441 442 443
#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

444 445 446 447 448 449 450 451 452 453 454 455 456 457 458
#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
459 460 461 462 463 464
/* 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);
}

465 466 467 468 469 470 471 472 473 474 475 476
/* check if a VLAN entry is global */
static inline bool br_vlan_is_master(const struct net_bridge_vlan *v)
{
	return v->flags & BRIDGE_VLAN_INFO_MASTER;
}

/* check if a VLAN entry is used by the bridge */
static inline bool br_vlan_is_brentry(const struct net_bridge_vlan *v)
{
	return v->flags & BRIDGE_VLAN_INFO_BRENTRY;
}

477
/* check if we should use the vlan entry, returns false if it's only context */
478 479 480 481 482 483 484 485 486 487 488 489
static inline bool br_vlan_should_use(const struct net_bridge_vlan *v)
{
	if (br_vlan_is_master(v)) {
		if (br_vlan_is_brentry(v))
			return true;
		else
			return false;
	}

	return true;
}

L
Linus Torvalds 已提交
490
/* br_device.c */
491 492 493
void br_dev_setup(struct net_device *dev);
void br_dev_delete(struct net_device *dev, struct list_head *list);
netdev_tx_t br_dev_xmit(struct sk_buff *skb, struct net_device *dev);
S
stephen hemminger 已提交
494
#ifdef CONFIG_NET_POLL_CONTROLLER
H
Herbert Xu 已提交
495 496 497 498 499 500 501 502 503
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);
}

504
int br_netpoll_enable(struct net_bridge_port *p);
505
void br_netpoll_disable(struct net_bridge_port *p);
S
stephen hemminger 已提交
506
#else
507
static inline void br_netpoll_send_skb(const struct net_bridge_port *p,
H
Herbert Xu 已提交
508 509 510
				       struct sk_buff *skb)
{
}
S
stephen hemminger 已提交
511

512
static inline int br_netpoll_enable(struct net_bridge_port *p)
H
Herbert Xu 已提交
513 514 515 516 517 518 519
{
	return 0;
}

static inline void br_netpoll_disable(struct net_bridge_port *p)
{
}
S
stephen hemminger 已提交
520
#endif
L
Linus Torvalds 已提交
521 522

/* br_fdb.c */
523 524
int br_fdb_init(void);
void br_fdb_fini(void);
525 526
int br_fdb_hash_init(struct net_bridge *br);
void br_fdb_hash_fini(struct net_bridge *br);
527
void br_fdb_flush(struct net_bridge *br);
528 529 530
void br_fdb_find_delete_local(struct net_bridge *br,
			      const struct net_bridge_port *p,
			      const unsigned char *addr, u16 vid);
531 532
void br_fdb_changeaddr(struct net_bridge_port *p, const unsigned char *newaddr);
void br_fdb_change_mac_address(struct net_bridge *br, const u8 *newaddr);
533
void br_fdb_cleanup(struct work_struct *work);
534
void br_fdb_delete_by_port(struct net_bridge *br,
535
			   const struct net_bridge_port *p, u16 vid, int do_all);
536 537 538
struct net_bridge_fdb_entry *br_fdb_find_rcu(struct net_bridge *br,
					     const unsigned char *addr,
					     __u16 vid);
539 540 541 542 543 544
int br_fdb_test_addr(struct net_device *dev, unsigned char *addr);
int br_fdb_fillbuf(struct net_bridge *br, void *buf, unsigned long count,
		   unsigned long off);
int br_fdb_insert(struct net_bridge *br, struct net_bridge_port *source,
		  const unsigned char *addr, u16 vid);
void br_fdb_update(struct net_bridge *br, struct net_bridge_port *source,
545
		   const unsigned char *addr, u16 vid, bool added_by_user);
546 547

int br_fdb_delete(struct ndmsg *ndm, struct nlattr *tb[],
548
		  struct net_device *dev, const unsigned char *addr, u16 vid);
549
int br_fdb_add(struct ndmsg *nlh, struct nlattr *tb[], struct net_device *dev,
550
	       const unsigned char *addr, u16 vid, u16 nlh_flags);
551
int br_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
552
		struct net_device *dev, struct net_device *fdev, int *idx);
553 554
int br_fdb_sync_static(struct net_bridge *br, struct net_bridge_port *p);
void br_fdb_unsync_static(struct net_bridge *br, struct net_bridge_port *p);
555 556 557 558
int br_fdb_external_learn_add(struct net_bridge *br, struct net_bridge_port *p,
			      const unsigned char *addr, u16 vid);
int br_fdb_external_learn_del(struct net_bridge *br, struct net_bridge_port *p,
			      const unsigned char *addr, u16 vid);
559 560
void br_fdb_offloaded_set(struct net_bridge *br, struct net_bridge_port *p,
			  const unsigned char *addr, u16 vid);
L
Linus Torvalds 已提交
561 562

/* br_forward.c */
563 564 565 566 567
enum br_pkt_type {
	BR_PKT_UNICAST,
	BR_PKT_MULTICAST,
	BR_PKT_BROADCAST
};
568
int br_dev_queue_push_xmit(struct net *net, struct sock *sk, struct sk_buff *skb);
569
void br_forward(const struct net_bridge_port *to, struct sk_buff *skb,
570
		bool local_rcv, bool local_orig);
571
int br_forward_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
572
void br_flood(struct net_bridge *br, struct sk_buff *skb,
573
	      enum br_pkt_type pkt_type, bool local_rcv, bool local_orig);
L
Linus Torvalds 已提交
574 575

/* br_if.c */
576 577 578
void br_port_carrier_check(struct net_bridge_port *p);
int br_add_bridge(struct net *net, const char *name);
int br_del_bridge(struct net *net, const char *name);
579 580
int br_add_if(struct net_bridge *br, struct net_device *dev,
	      struct netlink_ext_ack *extack);
581
int br_del_if(struct net_bridge *br, struct net_device *dev);
582
void br_mtu_auto_adjust(struct net_bridge *br);
583 584
netdev_features_t br_features_recompute(struct net_bridge *br,
					netdev_features_t features);
585
void br_port_flags_change(struct net_bridge_port *port, unsigned long mask);
586
void br_manage_promisc(struct net_bridge *br);
L
Linus Torvalds 已提交
587 588

/* br_input.c */
589
int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb);
590
rx_handler_result_t br_handle_frame(struct sk_buff **pskb);
L
Linus Torvalds 已提交
591

592 593 594 595 596
static inline bool br_rx_handler_check_rcu(const struct net_device *dev)
{
	return rcu_dereference(dev->rx_handler) == br_handle_frame;
}

597 598 599 600 601
static inline bool br_rx_handler_check_rtnl(const struct net_device *dev)
{
	return rcu_dereference_rtnl(dev->rx_handler) == br_handle_frame;
}

602 603 604 605 606
static inline struct net_bridge_port *br_port_get_check_rcu(const struct net_device *dev)
{
	return br_rx_handler_check_rcu(dev) ? br_port_get_rcu(dev) : NULL;
}

607 608 609 610 611 612
static inline struct net_bridge_port *
br_port_get_check_rtnl(const struct net_device *dev)
{
	return br_rx_handler_check_rtnl(dev) ? br_port_get_rtnl_rcu(dev) : NULL;
}

L
Linus Torvalds 已提交
613
/* br_ioctl.c */
614 615 616
int br_dev_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
int br_ioctl_deviceless_stub(struct net *net, unsigned int cmd,
			     void __user *arg);
L
Linus Torvalds 已提交
617

618 619
/* br_multicast.c */
#ifdef CONFIG_BRIDGE_IGMP_SNOOPING
C
Cong Wang 已提交
620
extern unsigned int br_mdb_rehash_seq;
621
int br_multicast_rcv(struct net_bridge *br, struct net_bridge_port *port,
622
		     struct sk_buff *skb, u16 vid);
623 624
struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
					struct sk_buff *skb, u16 vid);
625
int br_multicast_add_port(struct net_bridge_port *port);
626 627 628 629 630 631
void br_multicast_del_port(struct net_bridge_port *port);
void br_multicast_enable_port(struct net_bridge_port *port);
void br_multicast_disable_port(struct net_bridge_port *port);
void br_multicast_init(struct net_bridge *br);
void br_multicast_open(struct net_bridge *br);
void br_multicast_stop(struct net_bridge *br);
632
void br_multicast_dev_del(struct net_bridge *br);
633 634
void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
			struct sk_buff *skb, bool local_rcv, bool local_orig);
635 636 637 638 639
int br_multicast_set_router(struct net_bridge *br, unsigned long val);
int br_multicast_set_port_router(struct net_bridge_port *p, unsigned long val);
int br_multicast_toggle(struct net_bridge *br, unsigned long val);
int br_multicast_set_querier(struct net_bridge *br, unsigned long val);
int br_multicast_set_hash_max(struct net_bridge *br, unsigned long val);
640
int br_multicast_set_igmp_version(struct net_bridge *br, unsigned long val);
641 642 643
#if IS_ENABLED(CONFIG_IPV6)
int br_multicast_set_mld_version(struct net_bridge *br, unsigned long val);
#endif
644 645 646 647 648 649 650 651 652
struct net_bridge_mdb_entry *
br_mdb_ip_get(struct net_bridge_mdb_htable *mdb, struct br_ip *dst);
struct net_bridge_mdb_entry *
br_multicast_new_group(struct net_bridge *br, struct net_bridge_port *port,
		       struct br_ip *group);
void br_multicast_free_pg(struct rcu_head *head);
struct net_bridge_port_group *
br_multicast_new_port_group(struct net_bridge_port *port, struct br_ip *group,
			    struct net_bridge_port_group __rcu *next,
F
Felix Fietkau 已提交
653
			    unsigned char flags, const unsigned char *src);
654 655
void br_mdb_init(void);
void br_mdb_uninit(void);
656 657
void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
		   struct br_ip *group, int type, u8 flags);
658 659
void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
		   int type);
660
void br_multicast_count(struct net_bridge *br, const struct net_bridge_port *p,
661
			const struct sk_buff *skb, u8 type, u8 dir);
662
int br_multicast_init_stats(struct net_bridge *br);
663
void br_multicast_uninit_stats(struct net_bridge *br);
664 665 666
void br_multicast_get_stats(const struct net_bridge *br,
			    const struct net_bridge_port *p,
			    struct br_mcast_stats *dest);
667

668 669 670
#define mlock_dereference(X, br) \
	rcu_dereference_protected(X, lockdep_is_held(&br->multicast_lock))

671 672 673 674 675 676
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));
}
677

678 679
static inline bool
__br_multicast_querier_exists(struct net_bridge *br,
680 681
				struct bridge_mcast_other_query *querier,
				const bool is_ipv6)
682
{
683 684 685 686 687 688 689 690 691 692 693
	bool own_querier_enabled;

	if (br->multicast_querier) {
		if (is_ipv6 && !br->has_ipv6_addr)
			own_querier_enabled = false;
		else
			own_querier_enabled = true;
	} else {
		own_querier_enabled = false;
	}

694
	return time_is_before_jiffies(querier->delay_time) &&
695
	       (own_querier_enabled || timer_pending(&querier->timer));
696 697 698 699 700 701 702
}

static inline bool br_multicast_querier_exists(struct net_bridge *br,
					       struct ethhdr *eth)
{
	switch (eth->h_proto) {
	case (htons(ETH_P_IP)):
703 704
		return __br_multicast_querier_exists(br,
			&br->ip4_other_query, false);
705 706
#if IS_ENABLED(CONFIG_IPV6)
	case (htons(ETH_P_IPV6)):
707 708
		return __br_multicast_querier_exists(br,
			&br->ip6_other_query, true);
709 710 711 712
#endif
	default:
		return false;
	}
713
}
714 715 716 717 718

static inline int br_multicast_igmp_type(const struct sk_buff *skb)
{
	return BR_INPUT_SKB_CB(skb)->igmp;
}
719 720 721
#else
static inline int br_multicast_rcv(struct net_bridge *br,
				   struct net_bridge_port *port,
722 723
				   struct sk_buff *skb,
				   u16 vid)
724 725 726 727 728
{
	return 0;
}

static inline struct net_bridge_mdb_entry *br_mdb_get(struct net_bridge *br,
729
						      struct sk_buff *skb, u16 vid)
730 731 732 733
{
	return NULL;
}

734
static inline int br_multicast_add_port(struct net_bridge_port *port)
735
{
736
	return 0;
737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761
}

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)
{
}
762

763 764 765 766
static inline void br_multicast_dev_del(struct net_bridge *br)
{
}

767 768 769
static inline void br_multicast_flood(struct net_bridge_mdb_entry *mdst,
				      struct sk_buff *skb,
				      bool local_rcv, bool local_orig)
770 771 772
{
}

773 774
static inline bool br_multicast_is_router(struct net_bridge *br)
{
775
	return false;
776
}
777

778 779
static inline bool br_multicast_querier_exists(struct net_bridge *br,
					       struct ethhdr *eth)
780 781 782
{
	return false;
}
783

784 785 786
static inline void br_mdb_init(void)
{
}
787

788 789 790
static inline void br_mdb_uninit(void)
{
}
791 792 793

static inline void br_multicast_count(struct net_bridge *br,
				      const struct net_bridge_port *p,
794 795
				      const struct sk_buff *skb,
				      u8 type, u8 dir)
796 797 798 799 800 801 802 803
{
}

static inline int br_multicast_init_stats(struct net_bridge *br)
{
	return 0;
}

804 805 806 807
static inline void br_multicast_uninit_stats(struct net_bridge *br)
{
}

808 809 810 811
static inline int br_multicast_igmp_type(const struct sk_buff *skb)
{
	return 0;
}
812
#endif
813

814 815
/* br_vlan.c */
#ifdef CONFIG_BRIDGE_VLAN_FILTERING
816 817 818 819
bool br_allowed_ingress(const struct net_bridge *br,
			struct net_bridge_vlan_group *vg, struct sk_buff *skb,
			u16 *vid);
bool br_allowed_egress(struct net_bridge_vlan_group *vg,
820
		       const struct sk_buff *skb);
821
bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid);
822
struct sk_buff *br_handle_vlan(struct net_bridge *br,
823
			       const struct net_bridge_port *port,
824
			       struct net_bridge_vlan_group *vg,
825
			       struct sk_buff *skb);
826 827
int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
		bool *changed);
828 829
int br_vlan_delete(struct net_bridge *br, u16 vid);
void br_vlan_flush(struct net_bridge *br);
830
struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid);
831
void br_recalculate_fwd_mask(struct net_bridge *br);
832
int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
833
int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val);
834
int __br_vlan_set_proto(struct net_bridge *br, __be16 proto);
835
int br_vlan_set_proto(struct net_bridge *br, unsigned long val);
836
int br_vlan_set_stats(struct net_bridge *br, unsigned long val);
837
int br_vlan_init(struct net_bridge *br);
838
int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val);
839
int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid);
840 841
int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
		 bool *changed);
842 843
int nbp_vlan_delete(struct net_bridge_port *port, u16 vid);
void nbp_vlan_flush(struct net_bridge_port *port);
844
int nbp_vlan_init(struct net_bridge_port *port);
845
int nbp_get_num_vlan_infos(struct net_bridge_port *p, u32 filter_mask);
846 847
void br_vlan_get_stats(const struct net_bridge_vlan *v,
		       struct br_vlan_stats *stats);
848

849 850
static inline struct net_bridge_vlan_group *br_vlan_group(
					const struct net_bridge *br)
851
{
852
	return rtnl_dereference(br->vlgrp);
853 854
}

855 856
static inline struct net_bridge_vlan_group *nbp_vlan_group(
					const struct net_bridge_port *p)
857
{
858 859 860 861 862 863 864 865 866 867 868 869 870
	return rtnl_dereference(p->vlgrp);
}

static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
					const struct net_bridge *br)
{
	return rcu_dereference(br->vlgrp);
}

static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
					const struct net_bridge_port *p)
{
	return rcu_dereference(p->vlgrp);
871 872 873 874 875 876 877 878 879
}

/* Since bridge now depends on 8021Q module, but the time bridge sees the
 * skb, the vlan tag will always be present if the frame was tagged.
 */
static inline int br_vlan_get_tag(const struct sk_buff *skb, u16 *vid)
{
	int err = 0;

880
	if (skb_vlan_tag_present(skb)) {
881
		*vid = skb_vlan_tag_get(skb) & VLAN_VID_MASK;
882
	} else {
883 884 885 886 887 888
		*vid = 0;
		err = -EINVAL;
	}

	return err;
}
889

890
static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
891
{
892
	if (!vg)
893 894 895
		return 0;

	smp_rmb();
896
	return vg->pvid;
897 898
}

899
#else
900 901
static inline bool br_allowed_ingress(const struct net_bridge *br,
				      struct net_bridge_vlan_group *vg,
902 903
				      struct sk_buff *skb,
				      u16 *vid)
904 905 906 907
{
	return true;
}

908
static inline bool br_allowed_egress(struct net_bridge_vlan_group *vg,
909 910 911 912 913
				     const struct sk_buff *skb)
{
	return true;
}

914 915 916 917 918 919
static inline bool br_should_learn(struct net_bridge_port *p,
				   struct sk_buff *skb, u16 *vid)
{
	return true;
}

920
static inline struct sk_buff *br_handle_vlan(struct net_bridge *br,
921
					     const struct net_bridge_port *port,
922
					     struct net_bridge_vlan_group *vg,
923 924 925 926 927
					     struct sk_buff *skb)
{
	return skb;
}

928 929
static inline int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags,
			      bool *changed)
930
{
931
	*changed = false;
932 933 934 935 936 937 938 939 940 941 942 943
	return -EOPNOTSUPP;
}

static inline int br_vlan_delete(struct net_bridge *br, u16 vid)
{
	return -EOPNOTSUPP;
}

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

944 945 946 947
static inline void br_recalculate_fwd_mask(struct net_bridge *br)
{
}

948
static inline int br_vlan_init(struct net_bridge *br)
949
{
950
	return 0;
951 952
}

953 954
static inline int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
			       bool *changed)
955
{
956
	*changed = false;
957 958 959 960 961 962 963 964 965 966 967 968
	return -EOPNOTSUPP;
}

static inline int nbp_vlan_delete(struct net_bridge_port *port, u16 vid)
{
	return -EOPNOTSUPP;
}

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

969 970
static inline struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg,
						   u16 vid)
971 972 973 974
{
	return NULL;
}

975
static inline int nbp_vlan_init(struct net_bridge_port *port)
976
{
977
	return 0;
978 979
}

980
static inline u16 br_vlan_get_tag(const struct sk_buff *skb, u16 *tag)
981 982 983 984
{
	return 0;
}

985
static inline u16 br_get_pvid(const struct net_bridge_vlan_group *vg)
986
{
V
Vlad Yasevich 已提交
987
	return 0;
988
}
989

990 991 992 993 994
static inline int __br_vlan_filter_toggle(struct net_bridge *br,
					  unsigned long val)
{
	return -EOPNOTSUPP;
}
995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012

static inline int nbp_get_num_vlan_infos(struct net_bridge_port *p,
					 u32 filter_mask)
{
	return 0;
}

static inline struct net_bridge_vlan_group *br_vlan_group(
					const struct net_bridge *br)
{
	return NULL;
}

static inline struct net_bridge_vlan_group *nbp_vlan_group(
					const struct net_bridge_port *p)
{
	return NULL;
}
1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024

static inline struct net_bridge_vlan_group *br_vlan_group_rcu(
					const struct net_bridge *br)
{
	return NULL;
}

static inline struct net_bridge_vlan_group *nbp_vlan_group_rcu(
					const struct net_bridge_port *p)
{
	return NULL;
}
1025 1026 1027 1028 1029

static inline void br_vlan_get_stats(const struct net_bridge_vlan *v,
				     struct br_vlan_stats *stats)
{
}
1030 1031
#endif

1032 1033 1034 1035 1036
struct nf_br_ops {
	int (*br_dev_xmit_hook)(struct sk_buff *skb);
};
extern const struct nf_br_ops __rcu *nf_br_ops;

L
Linus Torvalds 已提交
1037
/* br_netfilter.c */
1038 1039 1040
#if IS_ENABLED(CONFIG_BRIDGE_NETFILTER)
int br_nf_core_init(void);
void br_nf_core_fini(void);
1041
void br_netfilter_rtable_init(struct net_bridge *);
1042
#else
1043 1044
static inline int br_nf_core_init(void) { return 0; }
static inline void br_nf_core_fini(void) {}
1045
#define br_netfilter_rtable_init(x)
1046
#endif
L
Linus Torvalds 已提交
1047 1048

/* br_stp.c */
1049
void br_set_state(struct net_bridge_port *p, unsigned int state);
1050 1051 1052
struct net_bridge_port *br_get_port(struct net_bridge *br, u16 port_no);
void br_init_port(struct net_bridge_port *p);
void br_become_designated_port(struct net_bridge_port *p);
L
Linus Torvalds 已提交
1053

1054 1055 1056 1057
void __br_set_forward_delay(struct net_bridge *br, unsigned long t);
int br_set_forward_delay(struct net_bridge *br, unsigned long x);
int br_set_hello_time(struct net_bridge *br, unsigned long x);
int br_set_max_age(struct net_bridge *br, unsigned long x);
1058
int __set_ageing_time(struct net_device *dev, unsigned long t);
1059
int br_set_ageing_time(struct net_bridge *br, clock_t ageing_time);
1060 1061


L
Linus Torvalds 已提交
1062
/* br_stp_if.c */
1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073
void br_stp_enable_bridge(struct net_bridge *br);
void br_stp_disable_bridge(struct net_bridge *br);
void br_stp_set_enabled(struct net_bridge *br, unsigned long val);
void br_stp_enable_port(struct net_bridge_port *p);
void br_stp_disable_port(struct net_bridge_port *p);
bool br_stp_recalculate_bridge_id(struct net_bridge *br);
void br_stp_change_bridge_id(struct net_bridge *br, const unsigned char *a);
void br_stp_set_bridge_priority(struct net_bridge *br, u16 newprio);
int br_stp_set_port_priority(struct net_bridge_port *p, unsigned long newprio);
int br_stp_set_path_cost(struct net_bridge_port *p, unsigned long path_cost);
ssize_t br_show_bridge_id(char *buf, const struct bridge_id *id);
L
Linus Torvalds 已提交
1074 1075

/* br_stp_bpdu.c */
P
Patrick McHardy 已提交
1076
struct stp_proto;
1077 1078
void br_stp_rcv(const struct stp_proto *proto, struct sk_buff *skb,
		struct net_device *dev);
L
Linus Torvalds 已提交
1079 1080

/* br_stp_timer.c */
1081 1082 1083
void br_stp_timer_init(struct net_bridge *br);
void br_stp_port_timer_init(struct net_bridge_port *p);
unsigned long br_timer_value(const struct timer_list *timer);
L
Linus Torvalds 已提交
1084 1085

/* br.c */
I
Igor Maravić 已提交
1086
#if IS_ENABLED(CONFIG_ATM_LANE)
1087 1088
extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr);
#endif
L
Linus Torvalds 已提交
1089

1090
/* br_netlink.c */
1091
extern struct rtnl_link_ops br_link_ops;
1092 1093
int br_netlink_init(void);
void br_netlink_fini(void);
1094 1095
void br_ifinfo_notify(int event, const struct net_bridge *br,
		      const struct net_bridge_port *port);
1096 1097
int br_setlink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
int br_dellink(struct net_device *dev, struct nlmsghdr *nlmsg, u16 flags);
1098
int br_getlink(struct sk_buff *skb, u32 pid, u32 seq, struct net_device *dev,
1099
	       u32 filter_mask, int nlflags);
1100

L
Linus Torvalds 已提交
1101 1102
#ifdef CONFIG_SYSFS
/* br_sysfs_if.c */
1103
extern const struct sysfs_ops brport_sysfs_ops;
1104 1105
int br_sysfs_addif(struct net_bridge_port *p);
int br_sysfs_renameif(struct net_bridge_port *p);
L
Linus Torvalds 已提交
1106 1107

/* br_sysfs_br.c */
1108 1109
int br_sysfs_addbr(struct net_device *dev);
void br_sysfs_delbr(struct net_device *dev);
L
Linus Torvalds 已提交
1110 1111 1112

#else

1113 1114 1115 1116
static inline int br_sysfs_addif(struct net_bridge_port *p) { return 0; }
static inline int br_sysfs_renameif(struct net_bridge_port *p) { return 0; }
static inline int br_sysfs_addbr(struct net_device *dev) { return 0; }
static inline void br_sysfs_delbr(struct net_device *dev) { return; }
L
Linus Torvalds 已提交
1117 1118
#endif /* CONFIG_SYSFS */

1119 1120 1121 1122 1123 1124 1125
/* br_switchdev.c */
#ifdef CONFIG_NET_SWITCHDEV
int nbp_switchdev_mark_set(struct net_bridge_port *p);
void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
			      struct sk_buff *skb);
bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
				  const struct sk_buff *skb);
1126 1127 1128
int br_switchdev_set_port_flag(struct net_bridge_port *p,
			       unsigned long flags,
			       unsigned long mask);
1129 1130
void br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb,
			     int type);
1131 1132 1133 1134 1135

static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
{
	skb->offload_fwd_mark = 0;
}
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151
#else
static inline int nbp_switchdev_mark_set(struct net_bridge_port *p)
{
	return 0;
}

static inline void nbp_switchdev_frame_mark(const struct net_bridge_port *p,
					    struct sk_buff *skb)
{
}

static inline bool nbp_switchdev_allowed_egress(const struct net_bridge_port *p,
						const struct sk_buff *skb)
{
	return true;
}
1152 1153 1154 1155 1156 1157 1158

static inline int br_switchdev_set_port_flag(struct net_bridge_port *p,
					     unsigned long flags,
					     unsigned long mask)
{
	return 0;
}
1159 1160 1161 1162 1163

static inline void
br_switchdev_fdb_notify(const struct net_bridge_fdb_entry *fdb, int type)
{
}
1164 1165 1166 1167

static inline void br_switchdev_frame_unmark(struct sk_buff *skb)
{
}
1168 1169
#endif /* CONFIG_NET_SWITCHDEV */

1170
/* br_arp_nd_proxy.c */
1171
void br_recalculate_neigh_suppress_enabled(struct net_bridge *br);
1172 1173
void br_do_proxy_suppress_arp(struct sk_buff *skb, struct net_bridge *br,
			      u16 vid, struct net_bridge_port *p);
1174 1175 1176
void br_do_suppress_nd(struct sk_buff *skb, struct net_bridge *br,
		       u16 vid, struct net_bridge_port *p, struct nd_msg *msg);
struct nd_msg *br_is_nd_neigh_msg(struct sk_buff *skb, struct nd_msg *m);
L
Linus Torvalds 已提交
1177
#endif