summaryrefslogtreecommitdiffstats
path: root/include/net/bonding.h
blob: 625d9c72dee37d3fcac0691d2f3ef7ca84d67fdf (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
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
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
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
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
/*
 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
 *
 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
 * NCM: Network and Communications Management, Inc.
 *
 * BUT, I'm the one who modified it for ethernet, so:
 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
 *
 *	This software may be used and distributed according to the terms
 *	of the GNU Public License, incorporated herein by reference.
 *
 */

#ifndef _NET_BONDING_H
#define _NET_BONDING_H

#include <linux/timer.h>
#include <linux/proc_fs.h>
#include <linux/if_bonding.h>
#include <linux/cpumask.h>
#include <linux/in6.h>
#include <linux/netpoll.h>
#include <linux/inetdevice.h>
#include <linux/etherdevice.h>
#include <linux/reciprocal_div.h>
#include <linux/if_link.h>

#include <net/bond_3ad.h>
#include <net/bond_alb.h>
#include <net/bond_options.h>

#define BOND_MAX_ARP_TARGETS	16

#define BOND_DEFAULT_MIIMON	100

#ifndef __long_aligned
#define __long_aligned __attribute__((aligned((sizeof(long)))))
#endif

#define slave_info(bond_dev, slave_dev, fmt, ...) \
	netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
#define slave_warn(bond_dev, slave_dev, fmt, ...) \
	netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
#define slave_dbg(bond_dev, slave_dev, fmt, ...) \
	netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
#define slave_err(bond_dev, slave_dev, fmt, ...) \
	netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)

#define BOND_MODE(bond) ((bond)->params.mode)

/* slave list primitives */
#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)

#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))

/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
#define bond_first_slave(bond) \
	(bond_has_slaves(bond) ? \
		netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
		NULL)
#define bond_last_slave(bond) \
	(bond_has_slaves(bond) ? \
		netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
		NULL)

/* Caller must have rcu_read_lock */
#define bond_first_slave_rcu(bond) \
	netdev_lower_get_first_private_rcu(bond->dev)

#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))

/**
 * bond_for_each_slave - iterate over all slaves
 * @bond:	the bond holding this list
 * @pos:	current slave
 * @iter:	list_head * iterator
 *
 * Caller must hold RTNL
 */
#define bond_for_each_slave(bond, pos, iter) \
	netdev_for_each_lower_private((bond)->dev, pos, iter)

/* Caller must have rcu_read_lock */
#define bond_for_each_slave_rcu(bond, pos, iter) \
	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)

#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
			    NETIF_F_GSO_ESP)

#define BOND_TLS_FEATURES (NETIF_F_HW_TLS_TX | NETIF_F_HW_TLS_RX)

#ifdef CONFIG_NET_POLL_CONTROLLER
extern atomic_t netpoll_block_tx;

static inline void block_netpoll_tx(void)
{
	atomic_inc(&netpoll_block_tx);
}

static inline void unblock_netpoll_tx(void)
{
	atomic_dec(&netpoll_block_tx);
}

static inline int is_netpoll_tx_blocked(struct net_device *dev)
{
	if (unlikely(netpoll_tx_running(dev)))
		return atomic_read(&netpoll_block_tx);
	return 0;
}
#else
#define block_netpoll_tx()
#define unblock_netpoll_tx()
#define is_netpoll_tx_blocked(dev) (0)
#endif

struct bond_params {
	int mode;
	int xmit_policy;
	int miimon;
	u8 num_peer_notif;
	int arp_interval;
	int arp_validate;
	int arp_all_targets;
	int use_carrier;
	int fail_over_mac;
	int updelay;
	int downdelay;
	int peer_notif_delay;
	int lacp_fast;
	unsigned int min_links;
	int ad_select;
	char primary[IFNAMSIZ];
	int primary_reselect;
	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
	int tx_queues;
	int all_slaves_active;
	int resend_igmp;
	int lp_interval;
	int packets_per_slave;
	int tlb_dynamic_lb;
	struct reciprocal_value reciprocal_packets_per_slave;
	u16 ad_actor_sys_prio;
	u16 ad_user_port_key;

	/* 2 bytes of padding : see ether_addr_equal_64bits() */
	u8 ad_actor_system[ETH_ALEN + 2];
};

struct bond_parm_tbl {
	char *modename;
	int mode;
};

struct slave {
	struct net_device *dev; /* first - useful for panic debug */
	struct bonding *bond; /* our master */
	int    delay;
	/* all three in jiffies */
	unsigned long last_link_up;
	unsigned long last_rx;
	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
	s8     link;		/* one of BOND_LINK_XXXX */
	s8     link_new_state;	/* one of BOND_LINK_XXXX */
	u8     backup:1,   /* indicates backup slave. Value corresponds with
			      BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	       inactive:1, /* indicates inactive slave */
	       should_notify:1, /* indicates whether the state changed */
	       should_notify_link:1; /* indicates whether the link changed */
	u8     duplex;
	u32    original_mtu;
	u32    link_failure_count;
	u32    speed;
	u16    queue_id;
	u8     perm_hwaddr[MAX_ADDR_LEN];
	struct ad_slave_info *ad_info;
	struct tlb_slave_info tlb_info;
#ifdef CONFIG_NET_POLL_CONTROLLER
	struct netpoll *np;
#endif
	struct delayed_work notify_work;
	struct kobject kobj;
	struct rtnl_link_stats64 slave_stats;
};

static inline struct slave *to_slave(struct kobject *kobj)
{
	return container_of(kobj, struct slave, kobj);
}

struct bond_up_slave {
	unsigned int	count;
	struct rcu_head rcu;
	struct slave	*arr[];
};

/*
 * Link pseudo-state only used internally by monitors
 */
#define BOND_LINK_NOCHANGE -1

struct bond_ipsec {
	struct list_head list;
	struct xfrm_state *xs;
};

/*
 * Here are the locking policies for the two bonding locks:
 * Get rcu_read_lock when reading or RTNL when writing slave list.
 */
struct bonding {
	struct   net_device *dev; /* first - useful for panic debug */
	struct   slave __rcu *curr_active_slave;
	struct   slave __rcu *current_arp_slave;
	struct   slave __rcu *primary_slave;
	struct   bond_up_slave __rcu *usable_slaves;
	struct   bond_up_slave __rcu *all_slaves;
	bool     force_primary;
	s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
	int     (*recv_probe)(const struct sk_buff *, struct bonding *,
			      struct slave *);
	/* mode_lock is used for mode-specific locking needs, currently used by:
	 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
	 *                bond_3ad_state_machine_handler() concurrently and also
	 *                the access to the state machine shared variables.
	 * TLB mode (5) - to sync the use and modifications of its hash table
	 * ALB mode (6) - to sync the use and modifications of its hash table
	 */
	spinlock_t mode_lock;
	spinlock_t stats_lock;
	u8	 send_peer_notif;
	u8       igmp_retrans;
#ifdef CONFIG_PROC_FS
	struct   proc_dir_entry *proc_entry;
	char     proc_file_name[IFNAMSIZ];
#endif /* CONFIG_PROC_FS */
	struct   list_head bond_list;
	u32 __percpu *rr_tx_counter;
	struct   ad_bond_info ad_info;
	struct   alb_bond_info alb_info;
	struct   bond_params params;
	struct   workqueue_struct *wq;
	struct   delayed_work mii_work;
	struct   delayed_work arp_work;
	struct   delayed_work alb_work;
	struct   delayed_work ad_work;
	struct   delayed_work mcast_work;
	struct   delayed_work slave_arr_work;
#ifdef CONFIG_DEBUG_FS
	/* debugging support via debugfs */
	struct	 dentry *debug_dir;
#endif /* CONFIG_DEBUG_FS */
	struct rtnl_link_stats64 bond_stats;
#ifdef CONFIG_XFRM_OFFLOAD
	struct list_head ipsec_list;
	/* protecting ipsec_list */
	spinlock_t ipsec_lock;
#endif /* CONFIG_XFRM_OFFLOAD */
};

#define bond_slave_get_rcu(dev) \
	((struct slave *) rcu_dereference(dev->rx_handler_data))

#define bond_slave_get_rtnl(dev) \
	((struct slave *) rtnl_dereference(dev->rx_handler_data))

void bond_queue_slave_event(struct slave *slave);
void bond_lower_state_changed(struct slave *slave);

struct bond_vlan_tag {
	__be16		vlan_proto;
	unsigned short	vlan_id;
};

bool bond_sk_check(struct bonding *bond);

/**
 * Returns NULL if the net_device does not belong to any of the bond's slaves
 *
 * Caller must hold bond lock for read
 */
static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
						  struct net_device *slave_dev)
{
	return netdev_lower_dev_get_private(bond->dev, slave_dev);
}

static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
{
	return slave->bond;
}

static inline bool bond_should_override_tx_queue(struct bonding *bond)
{
	return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
	       BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
}

static inline bool bond_is_lb(const struct bonding *bond)
{
	return BOND_MODE(bond) == BOND_MODE_TLB ||
	       BOND_MODE(bond) == BOND_MODE_ALB;
}

static inline bool bond_needs_speed_duplex(const struct bonding *bond)
{
	return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
}

static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
{
	return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
}

static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
{
	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
		BOND_MODE(bond) == BOND_MODE_XOR ||
		BOND_MODE(bond) == BOND_MODE_TLB ||
		BOND_MODE(bond) == BOND_MODE_ALB);
}

static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
{
	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
		BOND_MODE(bond) == BOND_MODE_XOR ||
		bond_is_nondyn_tlb(bond));
}

static inline bool bond_mode_uses_arp(int mode)
{
	return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
	       mode != BOND_MODE_ALB;
}

static inline bool bond_mode_uses_primary(int mode)
{
	return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
	       mode == BOND_MODE_ALB;
}

static inline bool bond_uses_primary(struct bonding *bond)
{
	return bond_mode_uses_primary(BOND_MODE(bond));
}

static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
{
	struct slave *slave = rcu_dereference(bond->curr_active_slave);

	return bond_uses_primary(bond) && slave ? slave->dev : NULL;
}

static inline bool bond_slave_is_up(struct slave *slave)
{
	return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
}

static inline void bond_set_active_slave(struct slave *slave)
{
	if (slave->backup) {
		slave->backup = 0;
		bond_queue_slave_event(slave);
		bond_lower_state_changed(slave);
	}
}

static inline void bond_set_backup_slave(struct slave *slave)
{
	if (!slave->backup) {
		slave->backup = 1;
		bond_queue_slave_event(slave);
		bond_lower_state_changed(slave);
	}
}

static inline void bond_set_slave_state(struct slave *slave,
					int slave_state, bool notify)
{
	if (slave->backup == slave_state)
		return;

	slave->backup = slave_state;
	if (notify) {
		bond_lower_state_changed(slave);
		bond_queue_slave_event(slave);
		slave->should_notify = 0;
	} else {
		if (slave->should_notify)
			slave->should_notify = 0;
		else
			slave->should_notify = 1;
	}
}

static inline void bond_slave_state_change(struct bonding *bond)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, iter) {
		if (tmp->link == BOND_LINK_UP)
			bond_set_active_slave(tmp);
		else if (tmp->link == BOND_LINK_DOWN)
			bond_set_backup_slave(tmp);
	}
}

static inline void bond_slave_state_notify(struct bonding *bond)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, iter) {
		if (tmp->should_notify) {
			bond_lower_state_changed(tmp);
			tmp->should_notify = 0;
		}
	}
}

static inline int bond_slave_state(struct slave *slave)
{
	return slave->backup;
}

static inline bool bond_is_active_slave(struct slave *slave)
{
	return !bond_slave_state(slave);
}

static inline bool bond_slave_can_tx(struct slave *slave)
{
	return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
	       bond_is_active_slave(slave);
}

static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
{
	struct slave *slave;
	bool active;

	rcu_read_lock();
	slave = bond_slave_get_rcu(slave_dev);
	active = bond_is_active_slave(slave);
	rcu_read_unlock();

	return active;
}

static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
{
	if (len == ETH_ALEN) {
		ether_addr_copy(dst, src);
		return;
	}

	memcpy(dst, src, len);
}

#define BOND_PRI_RESELECT_ALWAYS	0
#define BOND_PRI_RESELECT_BETTER	1
#define BOND_PRI_RESELECT_FAILURE	2

#define BOND_FOM_NONE			0
#define BOND_FOM_ACTIVE			1
#define BOND_FOM_FOLLOW			2

#define BOND_ARP_TARGETS_ANY		0
#define BOND_ARP_TARGETS_ALL		1

#define BOND_ARP_VALIDATE_NONE		0
#define BOND_ARP_VALIDATE_ACTIVE	(1 << BOND_STATE_ACTIVE)
#define BOND_ARP_VALIDATE_BACKUP	(1 << BOND_STATE_BACKUP)
#define BOND_ARP_VALIDATE_ALL		(BOND_ARP_VALIDATE_ACTIVE | \
					 BOND_ARP_VALIDATE_BACKUP)
#define BOND_ARP_FILTER			(BOND_ARP_VALIDATE_ALL + 1)
#define BOND_ARP_FILTER_ACTIVE		(BOND_ARP_VALIDATE_ACTIVE | \
					 BOND_ARP_FILTER)
#define BOND_ARP_FILTER_BACKUP		(BOND_ARP_VALIDATE_BACKUP | \
					 BOND_ARP_FILTER)

#define BOND_SLAVE_NOTIFY_NOW		true
#define BOND_SLAVE_NOTIFY_LATER		false

static inline int slave_do_arp_validate(struct bonding *bond,
					struct slave *slave)
{
	return bond->params.arp_validate & (1 << bond_slave_state(slave));
}

static inline int slave_do_arp_validate_only(struct bonding *bond)
{
	return bond->params.arp_validate & BOND_ARP_FILTER;
}

static inline int bond_is_ip_target_ok(__be32 addr)
{
	return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
}

/* Get the oldest arp which we've received on this slave for bond's
 * arp_targets.
 */
static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
						       struct slave *slave)
{
	int i = 1;
	unsigned long ret = slave->target_last_arp_rx[0];

	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
		if (time_before(slave->target_last_arp_rx[i], ret))
			ret = slave->target_last_arp_rx[i];

	return ret;
}

static inline unsigned long slave_last_rx(struct bonding *bond,
					struct slave *slave)
{
	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
		return slave_oldest_target_arp_rx(bond, slave);

	return slave->last_rx;
}

#ifdef CONFIG_NET_POLL_CONTROLLER
static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
					 struct sk_buff *skb)
{
	return netpoll_send_skb(slave->np, skb);
}
#else
static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
					 struct sk_buff *skb)
{
	BUG();
	return NETDEV_TX_OK;
}
#endif

static inline void bond_set_slave_inactive_flags(struct slave *slave,
						 bool notify)
{
	if (!bond_is_lb(slave->bond))
		bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
	if (!slave->bond->params.all_slaves_active)
		slave->inactive = 1;
}

static inline void bond_set_slave_active_flags(struct slave *slave,
					       bool notify)
{
	bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
	slave->inactive = 0;
}

static inline bool bond_is_slave_inactive(struct slave *slave)
{
	return slave->inactive;
}

static inline void bond_propose_link_state(struct slave *slave, int state)
{
	slave->link_new_state = state;
}

static inline void bond_commit_link_state(struct slave *slave, bool notify)
{
	if (slave->link_new_state == BOND_LINK_NOCHANGE)
		return;

	slave->link = slave->link_new_state;
	if (notify) {
		bond_queue_slave_event(slave);
		bond_lower_state_changed(slave);
		slave->should_notify_link = 0;
	} else {
		if (slave->should_notify_link)
			slave->should_notify_link = 0;
		else
			slave->should_notify_link = 1;
	}
}

static inline void bond_set_slave_link_state(struct slave *slave, int state,
					     bool notify)
{
	bond_propose_link_state(slave, state);
	bond_commit_link_state(slave, notify);
}

static inline void bond_slave_link_notify(struct bonding *bond)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, iter) {
		if (tmp->should_notify_link) {
			bond_queue_slave_event(tmp);
			bond_lower_state_changed(tmp);
			tmp->should_notify_link = 0;
		}
	}
}

static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
{
	struct in_device *in_dev;
	__be32 addr = 0;

	rcu_read_lock();
	in_dev = __in_dev_get_rcu(dev);

	if (in_dev)
		addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
					 RT_SCOPE_HOST);
	rcu_read_unlock();
	return addr;
}

struct bond_net {
	struct net		*net;	/* Associated network namespace */
	struct list_head	dev_list;
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry	*proc_dir;
#endif
	struct class_attribute	class_attr_bonding_masters;
};

int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
int bond_create(struct net *net, const char *name);
int bond_create_sysfs(struct bond_net *net);
void bond_destroy_sysfs(struct bond_net *net);
void bond_prepare_sysfs_group(struct bonding *bond);
int bond_sysfs_slave_add(struct slave *slave);
void bond_sysfs_slave_del(struct slave *slave);
int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
		 struct netlink_ext_ack *extack);
int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
int bond_set_carrier(struct bonding *bond);
void bond_select_active_slave(struct bonding *bond);
void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
void bond_create_debugfs(void);
void bond_destroy_debugfs(void);
void bond_debug_register(struct bonding *bond);
void bond_debug_unregister(struct bonding *bond);
void bond_debug_reregister(struct bonding *bond);
const char *bond_mode_name(int mode);
void bond_setup(struct net_device *bond_dev);
unsigned int bond_get_num_tx_queues(void);
int bond_netlink_init(void);
void bond_netlink_fini(void);
struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
const char *bond_slave_link_status(s8 link);
struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
					      struct net_device *end_dev,
					      int level);
int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
void bond_work_init_all(struct bonding *bond);

#ifdef CONFIG_PROC_FS
void bond_create_proc_entry(struct bonding *bond);
void bond_remove_proc_entry(struct bonding *bond);
void bond_create_proc_dir(struct bond_net *bn);
void bond_destroy_proc_dir(struct bond_net *bn);
#else
static inline void bond_create_proc_entry(struct bonding *bond)
{
}

static inline void bond_remove_proc_entry(struct bonding *bond)
{
}

static inline void bond_create_proc_dir(struct bond_net *bn)
{
}

static inline void bond_destroy_proc_dir(struct bond_net *bn)
{
}
#endif

static inline struct slave *bond_slave_has_mac(struct bonding *bond,
					       const u8 *mac)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, iter)
		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
			return tmp;

	return NULL;
}

/* Caller must hold rcu_read_lock() for read */
static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
					       const u8 *mac)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave_rcu(bond, tmp, iter)
		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
			return tmp;

	return NULL;
}

/* Caller must hold rcu_read_lock() for read */
static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
{
	struct list_head *iter;
	struct slave *tmp;
	struct netdev_hw_addr *ha;

	bond_for_each_slave_rcu(bond, tmp, iter)
		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
			return true;

	if (netdev_uc_empty(bond->dev))
		return false;

	netdev_for_each_uc_addr(ha, bond->dev)
		if (ether_addr_equal_64bits(mac, ha->addr))
			return true;

	return false;
}

/* Check if the ip is present in arp ip list, or first free slot if ip == 0
 * Returns -1 if not found, index if found
 */
static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
{
	int i;

	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
		if (targets[i] == ip)
			return i;
		else if (targets[i] == 0)
			break;

	return -1;
}

/* exported from bond_main.c */
extern unsigned int bond_net_id;
extern const struct bond_parm_tbl bond_lacp_tbl[];
extern const struct bond_parm_tbl xmit_hashtype_tbl[];
extern const struct bond_parm_tbl arp_validate_tbl[];
extern const struct bond_parm_tbl arp_all_targets_tbl[];
extern const struct bond_parm_tbl fail_over_mac_tbl[];
extern const struct bond_parm_tbl pri_reselect_tbl[];
extern struct bond_parm_tbl ad_select_tbl[];

/* exported from bond_netlink.c */
extern struct rtnl_link_ops bond_link_ops;

/* exported from bond_sysfs_slave.c */
extern const struct sysfs_ops slave_sysfs_ops;

static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
{
	atomic_long_inc(&dev->tx_dropped);
	dev_kfree_skb_any(skb);
	return NET_XMIT_DROP;
}

#endif /* _NET_BONDING_H */