xref: /openbmc/linux/include/net/bonding.h (revision 0edbfea5)
1 /*
2  * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
3  *
4  * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
5  * NCM: Network and Communications Management, Inc.
6  *
7  * BUT, I'm the one who modified it for ethernet, so:
8  * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
9  *
10  *	This software may be used and distributed according to the terms
11  *	of the GNU Public License, incorporated herein by reference.
12  *
13  */
14 
15 #ifndef _NET_BONDING_H
16 #define _NET_BONDING_H
17 
18 #include <linux/timer.h>
19 #include <linux/proc_fs.h>
20 #include <linux/if_bonding.h>
21 #include <linux/cpumask.h>
22 #include <linux/in6.h>
23 #include <linux/netpoll.h>
24 #include <linux/inetdevice.h>
25 #include <linux/etherdevice.h>
26 #include <linux/reciprocal_div.h>
27 #include <linux/if_link.h>
28 
29 #include <net/bond_3ad.h>
30 #include <net/bond_alb.h>
31 #include <net/bond_options.h>
32 
33 #define BOND_MAX_ARP_TARGETS	16
34 
35 #define BOND_DEFAULT_MIIMON	100
36 
37 /*
38  * Less bad way to call ioctl from within the kernel; this needs to be
39  * done some other way to get the call out of interrupt context.
40  * Needs "ioctl" variable to be supplied by calling context.
41  */
42 #define IOCTL(dev, arg, cmd) ({		\
43 	int res = 0;			\
44 	mm_segment_t fs = get_fs();	\
45 	set_fs(get_ds());		\
46 	res = ioctl(dev, arg, cmd);	\
47 	set_fs(fs);			\
48 	res; })
49 
50 #define BOND_MODE(bond) ((bond)->params.mode)
51 
52 /* slave list primitives */
53 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
54 
55 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
56 
57 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
58 #define bond_first_slave(bond) \
59 	(bond_has_slaves(bond) ? \
60 		netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
61 		NULL)
62 #define bond_last_slave(bond) \
63 	(bond_has_slaves(bond) ? \
64 		netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
65 		NULL)
66 
67 /* Caller must have rcu_read_lock */
68 #define bond_first_slave_rcu(bond) \
69 	netdev_lower_get_first_private_rcu(bond->dev)
70 
71 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
72 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
73 
74 /**
75  * bond_for_each_slave - iterate over all slaves
76  * @bond:	the bond holding this list
77  * @pos:	current slave
78  * @iter:	list_head * iterator
79  *
80  * Caller must hold RTNL
81  */
82 #define bond_for_each_slave(bond, pos, iter) \
83 	netdev_for_each_lower_private((bond)->dev, pos, iter)
84 
85 /* Caller must have rcu_read_lock */
86 #define bond_for_each_slave_rcu(bond, pos, iter) \
87 	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
88 
89 #ifdef CONFIG_NET_POLL_CONTROLLER
90 extern atomic_t netpoll_block_tx;
91 
92 static inline void block_netpoll_tx(void)
93 {
94 	atomic_inc(&netpoll_block_tx);
95 }
96 
97 static inline void unblock_netpoll_tx(void)
98 {
99 	atomic_dec(&netpoll_block_tx);
100 }
101 
102 static inline int is_netpoll_tx_blocked(struct net_device *dev)
103 {
104 	if (unlikely(netpoll_tx_running(dev)))
105 		return atomic_read(&netpoll_block_tx);
106 	return 0;
107 }
108 #else
109 #define block_netpoll_tx()
110 #define unblock_netpoll_tx()
111 #define is_netpoll_tx_blocked(dev) (0)
112 #endif
113 
114 struct bond_params {
115 	int mode;
116 	int xmit_policy;
117 	int miimon;
118 	u8 num_peer_notif;
119 	int arp_interval;
120 	int arp_validate;
121 	int arp_all_targets;
122 	int use_carrier;
123 	int fail_over_mac;
124 	int updelay;
125 	int downdelay;
126 	int lacp_fast;
127 	unsigned int min_links;
128 	int ad_select;
129 	char primary[IFNAMSIZ];
130 	int primary_reselect;
131 	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
132 	int tx_queues;
133 	int all_slaves_active;
134 	int resend_igmp;
135 	int lp_interval;
136 	int packets_per_slave;
137 	int tlb_dynamic_lb;
138 	struct reciprocal_value reciprocal_packets_per_slave;
139 	u16 ad_actor_sys_prio;
140 	u16 ad_user_port_key;
141 	u8 ad_actor_system[ETH_ALEN];
142 };
143 
144 struct bond_parm_tbl {
145 	char *modename;
146 	int mode;
147 };
148 
149 struct netdev_notify_work {
150 	struct delayed_work	work;
151 	struct net_device	*dev;
152 	struct netdev_bonding_info bonding_info;
153 };
154 
155 struct slave {
156 	struct net_device *dev; /* first - useful for panic debug */
157 	struct bonding *bond; /* our master */
158 	int    delay;
159 	/* all three in jiffies */
160 	unsigned long last_link_up;
161 	unsigned long last_rx;
162 	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
163 	s8     link;    /* one of BOND_LINK_XXXX */
164 	s8     new_link;
165 	u8     backup:1,   /* indicates backup slave. Value corresponds with
166 			      BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
167 	       inactive:1, /* indicates inactive slave */
168 	       should_notify:1, /* indicates whether the state changed */
169 	       should_notify_link:1; /* indicates whether the link changed */
170 	u8     duplex;
171 	u32    original_mtu;
172 	u32    link_failure_count;
173 	u32    speed;
174 	u16    queue_id;
175 	u8     perm_hwaddr[ETH_ALEN];
176 	struct ad_slave_info *ad_info;
177 	struct tlb_slave_info tlb_info;
178 #ifdef CONFIG_NET_POLL_CONTROLLER
179 	struct netpoll *np;
180 #endif
181 	struct kobject kobj;
182 	struct rtnl_link_stats64 slave_stats;
183 };
184 
185 struct bond_up_slave {
186 	unsigned int	count;
187 	struct rcu_head rcu;
188 	struct slave	*arr[0];
189 };
190 
191 /*
192  * Link pseudo-state only used internally by monitors
193  */
194 #define BOND_LINK_NOCHANGE -1
195 
196 /*
197  * Here are the locking policies for the two bonding locks:
198  * Get rcu_read_lock when reading or RTNL when writing slave list.
199  */
200 struct bonding {
201 	struct   net_device *dev; /* first - useful for panic debug */
202 	struct   slave __rcu *curr_active_slave;
203 	struct   slave __rcu *current_arp_slave;
204 	struct   slave __rcu *primary_slave;
205 	struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
206 	bool     force_primary;
207 	s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
208 	int     (*recv_probe)(const struct sk_buff *, struct bonding *,
209 			      struct slave *);
210 	/* mode_lock is used for mode-specific locking needs, currently used by:
211 	 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
212 	 *                bond_3ad_state_machine_handler() concurrently and also
213 	 *                the access to the state machine shared variables.
214 	 * TLB mode (5) - to sync the use and modifications of its hash table
215 	 * ALB mode (6) - to sync the use and modifications of its hash table
216 	 */
217 	spinlock_t mode_lock;
218 	spinlock_t stats_lock;
219 	u8	 send_peer_notif;
220 	u8       igmp_retrans;
221 #ifdef CONFIG_PROC_FS
222 	struct   proc_dir_entry *proc_entry;
223 	char     proc_file_name[IFNAMSIZ];
224 #endif /* CONFIG_PROC_FS */
225 	struct   list_head bond_list;
226 	u32      rr_tx_counter;
227 	struct   ad_bond_info ad_info;
228 	struct   alb_bond_info alb_info;
229 	struct   bond_params params;
230 	struct   workqueue_struct *wq;
231 	struct   delayed_work mii_work;
232 	struct   delayed_work arp_work;
233 	struct   delayed_work alb_work;
234 	struct   delayed_work ad_work;
235 	struct   delayed_work mcast_work;
236 	struct   delayed_work slave_arr_work;
237 #ifdef CONFIG_DEBUG_FS
238 	/* debugging support via debugfs */
239 	struct	 dentry *debug_dir;
240 #endif /* CONFIG_DEBUG_FS */
241 	struct rtnl_link_stats64 bond_stats;
242 };
243 
244 #define bond_slave_get_rcu(dev) \
245 	((struct slave *) rcu_dereference(dev->rx_handler_data))
246 
247 #define bond_slave_get_rtnl(dev) \
248 	((struct slave *) rtnl_dereference(dev->rx_handler_data))
249 
250 void bond_queue_slave_event(struct slave *slave);
251 void bond_lower_state_changed(struct slave *slave);
252 
253 struct bond_vlan_tag {
254 	__be16		vlan_proto;
255 	unsigned short	vlan_id;
256 };
257 
258 /**
259  * Returns NULL if the net_device does not belong to any of the bond's slaves
260  *
261  * Caller must hold bond lock for read
262  */
263 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
264 						  struct net_device *slave_dev)
265 {
266 	return netdev_lower_dev_get_private(bond->dev, slave_dev);
267 }
268 
269 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
270 {
271 	return slave->bond;
272 }
273 
274 static inline bool bond_should_override_tx_queue(struct bonding *bond)
275 {
276 	return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
277 	       BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
278 }
279 
280 static inline bool bond_is_lb(const struct bonding *bond)
281 {
282 	return BOND_MODE(bond) == BOND_MODE_TLB ||
283 	       BOND_MODE(bond) == BOND_MODE_ALB;
284 }
285 
286 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
287 {
288 	return (BOND_MODE(bond) == BOND_MODE_TLB)  &&
289 	       (bond->params.tlb_dynamic_lb == 0);
290 }
291 
292 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
293 {
294 	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
295 		BOND_MODE(bond) == BOND_MODE_XOR ||
296 		bond_is_nondyn_tlb(bond));
297 }
298 
299 static inline bool bond_mode_uses_arp(int mode)
300 {
301 	return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
302 	       mode != BOND_MODE_ALB;
303 }
304 
305 static inline bool bond_mode_uses_primary(int mode)
306 {
307 	return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
308 	       mode == BOND_MODE_ALB;
309 }
310 
311 static inline bool bond_uses_primary(struct bonding *bond)
312 {
313 	return bond_mode_uses_primary(BOND_MODE(bond));
314 }
315 
316 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
317 {
318 	struct slave *slave = rcu_dereference(bond->curr_active_slave);
319 
320 	return bond_uses_primary(bond) && slave ? slave->dev : NULL;
321 }
322 
323 static inline bool bond_slave_is_up(struct slave *slave)
324 {
325 	return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
326 }
327 
328 static inline void bond_set_active_slave(struct slave *slave)
329 {
330 	if (slave->backup) {
331 		slave->backup = 0;
332 		bond_queue_slave_event(slave);
333 		bond_lower_state_changed(slave);
334 		rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
335 	}
336 }
337 
338 static inline void bond_set_backup_slave(struct slave *slave)
339 {
340 	if (!slave->backup) {
341 		slave->backup = 1;
342 		bond_queue_slave_event(slave);
343 		bond_lower_state_changed(slave);
344 		rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
345 	}
346 }
347 
348 static inline void bond_set_slave_state(struct slave *slave,
349 					int slave_state, bool notify)
350 {
351 	if (slave->backup == slave_state)
352 		return;
353 
354 	slave->backup = slave_state;
355 	if (notify) {
356 		bond_lower_state_changed(slave);
357 		rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
358 		bond_queue_slave_event(slave);
359 		slave->should_notify = 0;
360 	} else {
361 		if (slave->should_notify)
362 			slave->should_notify = 0;
363 		else
364 			slave->should_notify = 1;
365 	}
366 }
367 
368 static inline void bond_slave_state_change(struct bonding *bond)
369 {
370 	struct list_head *iter;
371 	struct slave *tmp;
372 
373 	bond_for_each_slave(bond, tmp, iter) {
374 		if (tmp->link == BOND_LINK_UP)
375 			bond_set_active_slave(tmp);
376 		else if (tmp->link == BOND_LINK_DOWN)
377 			bond_set_backup_slave(tmp);
378 	}
379 }
380 
381 static inline void bond_slave_state_notify(struct bonding *bond)
382 {
383 	struct list_head *iter;
384 	struct slave *tmp;
385 
386 	bond_for_each_slave(bond, tmp, iter) {
387 		if (tmp->should_notify) {
388 			bond_lower_state_changed(tmp);
389 			rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
390 			tmp->should_notify = 0;
391 		}
392 	}
393 }
394 
395 static inline int bond_slave_state(struct slave *slave)
396 {
397 	return slave->backup;
398 }
399 
400 static inline bool bond_is_active_slave(struct slave *slave)
401 {
402 	return !bond_slave_state(slave);
403 }
404 
405 static inline bool bond_slave_can_tx(struct slave *slave)
406 {
407 	return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
408 	       bond_is_active_slave(slave);
409 }
410 
411 #define BOND_PRI_RESELECT_ALWAYS	0
412 #define BOND_PRI_RESELECT_BETTER	1
413 #define BOND_PRI_RESELECT_FAILURE	2
414 
415 #define BOND_FOM_NONE			0
416 #define BOND_FOM_ACTIVE			1
417 #define BOND_FOM_FOLLOW			2
418 
419 #define BOND_ARP_TARGETS_ANY		0
420 #define BOND_ARP_TARGETS_ALL		1
421 
422 #define BOND_ARP_VALIDATE_NONE		0
423 #define BOND_ARP_VALIDATE_ACTIVE	(1 << BOND_STATE_ACTIVE)
424 #define BOND_ARP_VALIDATE_BACKUP	(1 << BOND_STATE_BACKUP)
425 #define BOND_ARP_VALIDATE_ALL		(BOND_ARP_VALIDATE_ACTIVE | \
426 					 BOND_ARP_VALIDATE_BACKUP)
427 #define BOND_ARP_FILTER			(BOND_ARP_VALIDATE_ALL + 1)
428 #define BOND_ARP_FILTER_ACTIVE		(BOND_ARP_VALIDATE_ACTIVE | \
429 					 BOND_ARP_FILTER)
430 #define BOND_ARP_FILTER_BACKUP		(BOND_ARP_VALIDATE_BACKUP | \
431 					 BOND_ARP_FILTER)
432 
433 #define BOND_SLAVE_NOTIFY_NOW		true
434 #define BOND_SLAVE_NOTIFY_LATER		false
435 
436 static inline int slave_do_arp_validate(struct bonding *bond,
437 					struct slave *slave)
438 {
439 	return bond->params.arp_validate & (1 << bond_slave_state(slave));
440 }
441 
442 static inline int slave_do_arp_validate_only(struct bonding *bond)
443 {
444 	return bond->params.arp_validate & BOND_ARP_FILTER;
445 }
446 
447 static inline int bond_is_ip_target_ok(__be32 addr)
448 {
449 	return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
450 }
451 
452 /* Get the oldest arp which we've received on this slave for bond's
453  * arp_targets.
454  */
455 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
456 						       struct slave *slave)
457 {
458 	int i = 1;
459 	unsigned long ret = slave->target_last_arp_rx[0];
460 
461 	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
462 		if (time_before(slave->target_last_arp_rx[i], ret))
463 			ret = slave->target_last_arp_rx[i];
464 
465 	return ret;
466 }
467 
468 static inline unsigned long slave_last_rx(struct bonding *bond,
469 					struct slave *slave)
470 {
471 	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
472 		return slave_oldest_target_arp_rx(bond, slave);
473 
474 	return slave->last_rx;
475 }
476 
477 #ifdef CONFIG_NET_POLL_CONTROLLER
478 static inline void bond_netpoll_send_skb(const struct slave *slave,
479 					 struct sk_buff *skb)
480 {
481 	struct netpoll *np = slave->np;
482 
483 	if (np)
484 		netpoll_send_skb(np, skb);
485 }
486 #else
487 static inline void bond_netpoll_send_skb(const struct slave *slave,
488 					 struct sk_buff *skb)
489 {
490 }
491 #endif
492 
493 static inline void bond_set_slave_inactive_flags(struct slave *slave,
494 						 bool notify)
495 {
496 	if (!bond_is_lb(slave->bond))
497 		bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
498 	if (!slave->bond->params.all_slaves_active)
499 		slave->inactive = 1;
500 }
501 
502 static inline void bond_set_slave_active_flags(struct slave *slave,
503 					       bool notify)
504 {
505 	bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
506 	slave->inactive = 0;
507 }
508 
509 static inline bool bond_is_slave_inactive(struct slave *slave)
510 {
511 	return slave->inactive;
512 }
513 
514 static inline void bond_set_slave_link_state(struct slave *slave, int state,
515 					     bool notify)
516 {
517 	if (slave->link == state)
518 		return;
519 
520 	slave->link = state;
521 	if (notify) {
522 		bond_queue_slave_event(slave);
523 		bond_lower_state_changed(slave);
524 		slave->should_notify_link = 0;
525 	} else {
526 		if (slave->should_notify_link)
527 			slave->should_notify_link = 0;
528 		else
529 			slave->should_notify_link = 1;
530 	}
531 }
532 
533 static inline void bond_slave_link_notify(struct bonding *bond)
534 {
535 	struct list_head *iter;
536 	struct slave *tmp;
537 
538 	bond_for_each_slave(bond, tmp, iter) {
539 		if (tmp->should_notify_link) {
540 			bond_queue_slave_event(tmp);
541 			bond_lower_state_changed(tmp);
542 			tmp->should_notify_link = 0;
543 		}
544 	}
545 }
546 
547 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
548 {
549 	struct in_device *in_dev;
550 	__be32 addr = 0;
551 
552 	rcu_read_lock();
553 	in_dev = __in_dev_get_rcu(dev);
554 
555 	if (in_dev)
556 		addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
557 					 RT_SCOPE_HOST);
558 	rcu_read_unlock();
559 	return addr;
560 }
561 
562 struct bond_net {
563 	struct net		*net;	/* Associated network namespace */
564 	struct list_head	dev_list;
565 #ifdef CONFIG_PROC_FS
566 	struct proc_dir_entry	*proc_dir;
567 #endif
568 	struct class_attribute	class_attr_bonding_masters;
569 };
570 
571 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
572 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
573 int bond_create(struct net *net, const char *name);
574 int bond_create_sysfs(struct bond_net *net);
575 void bond_destroy_sysfs(struct bond_net *net);
576 void bond_prepare_sysfs_group(struct bonding *bond);
577 int bond_sysfs_slave_add(struct slave *slave);
578 void bond_sysfs_slave_del(struct slave *slave);
579 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
580 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
581 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
582 int bond_set_carrier(struct bonding *bond);
583 void bond_select_active_slave(struct bonding *bond);
584 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
585 void bond_create_debugfs(void);
586 void bond_destroy_debugfs(void);
587 void bond_debug_register(struct bonding *bond);
588 void bond_debug_unregister(struct bonding *bond);
589 void bond_debug_reregister(struct bonding *bond);
590 const char *bond_mode_name(int mode);
591 void bond_setup(struct net_device *bond_dev);
592 unsigned int bond_get_num_tx_queues(void);
593 int bond_netlink_init(void);
594 void bond_netlink_fini(void);
595 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
596 const char *bond_slave_link_status(s8 link);
597 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
598 					      struct net_device *end_dev,
599 					      int level);
600 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
601 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
602 
603 #ifdef CONFIG_PROC_FS
604 void bond_create_proc_entry(struct bonding *bond);
605 void bond_remove_proc_entry(struct bonding *bond);
606 void bond_create_proc_dir(struct bond_net *bn);
607 void bond_destroy_proc_dir(struct bond_net *bn);
608 #else
609 static inline void bond_create_proc_entry(struct bonding *bond)
610 {
611 }
612 
613 static inline void bond_remove_proc_entry(struct bonding *bond)
614 {
615 }
616 
617 static inline void bond_create_proc_dir(struct bond_net *bn)
618 {
619 }
620 
621 static inline void bond_destroy_proc_dir(struct bond_net *bn)
622 {
623 }
624 #endif
625 
626 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
627 					       const u8 *mac)
628 {
629 	struct list_head *iter;
630 	struct slave *tmp;
631 
632 	bond_for_each_slave(bond, tmp, iter)
633 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
634 			return tmp;
635 
636 	return NULL;
637 }
638 
639 /* Caller must hold rcu_read_lock() for read */
640 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
641 					       const u8 *mac)
642 {
643 	struct list_head *iter;
644 	struct slave *tmp;
645 
646 	bond_for_each_slave_rcu(bond, tmp, iter)
647 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
648 			return tmp;
649 
650 	return NULL;
651 }
652 
653 /* Caller must hold rcu_read_lock() for read */
654 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
655 {
656 	struct list_head *iter;
657 	struct slave *tmp;
658 	struct netdev_hw_addr *ha;
659 
660 	bond_for_each_slave_rcu(bond, tmp, iter)
661 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
662 			return true;
663 
664 	if (netdev_uc_empty(bond->dev))
665 		return false;
666 
667 	netdev_for_each_uc_addr(ha, bond->dev)
668 		if (ether_addr_equal_64bits(mac, ha->addr))
669 			return true;
670 
671 	return false;
672 }
673 
674 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
675  * Returns -1 if not found, index if found
676  */
677 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
678 {
679 	int i;
680 
681 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
682 		if (targets[i] == ip)
683 			return i;
684 		else if (targets[i] == 0)
685 			break;
686 
687 	return -1;
688 }
689 
690 /* exported from bond_main.c */
691 extern int bond_net_id;
692 extern const struct bond_parm_tbl bond_lacp_tbl[];
693 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
694 extern const struct bond_parm_tbl arp_validate_tbl[];
695 extern const struct bond_parm_tbl arp_all_targets_tbl[];
696 extern const struct bond_parm_tbl fail_over_mac_tbl[];
697 extern const struct bond_parm_tbl pri_reselect_tbl[];
698 extern struct bond_parm_tbl ad_select_tbl[];
699 
700 /* exported from bond_netlink.c */
701 extern struct rtnl_link_ops bond_link_ops;
702 
703 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
704 {
705 	atomic_long_inc(&dev->tx_dropped);
706 	dev_kfree_skb_any(skb);
707 }
708 
709 #endif /* _NET_BONDING_H */
710