xref: /openbmc/linux/include/net/bonding.h (revision 81113b04)
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 #ifndef __long_aligned
38 #define __long_aligned __attribute__((aligned((sizeof(long)))))
39 #endif
40 
41 #define slave_info(bond_dev, slave_dev, fmt, ...) \
42 	netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
43 #define slave_warn(bond_dev, slave_dev, fmt, ...) \
44 	netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
45 #define slave_dbg(bond_dev, slave_dev, fmt, ...) \
46 	netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
47 #define slave_err(bond_dev, slave_dev, fmt, ...) \
48 	netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
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_XFRM_OFFLOAD
90 #define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
91 			    NETIF_F_GSO_ESP)
92 #endif /* CONFIG_XFRM_OFFLOAD */
93 
94 #ifdef CONFIG_NET_POLL_CONTROLLER
95 extern atomic_t netpoll_block_tx;
96 
97 static inline void block_netpoll_tx(void)
98 {
99 	atomic_inc(&netpoll_block_tx);
100 }
101 
102 static inline void unblock_netpoll_tx(void)
103 {
104 	atomic_dec(&netpoll_block_tx);
105 }
106 
107 static inline int is_netpoll_tx_blocked(struct net_device *dev)
108 {
109 	if (unlikely(netpoll_tx_running(dev)))
110 		return atomic_read(&netpoll_block_tx);
111 	return 0;
112 }
113 #else
114 #define block_netpoll_tx()
115 #define unblock_netpoll_tx()
116 #define is_netpoll_tx_blocked(dev) (0)
117 #endif
118 
119 struct bond_params {
120 	int mode;
121 	int xmit_policy;
122 	int miimon;
123 	u8 num_peer_notif;
124 	int arp_interval;
125 	int arp_validate;
126 	int arp_all_targets;
127 	int use_carrier;
128 	int fail_over_mac;
129 	int updelay;
130 	int downdelay;
131 	int peer_notif_delay;
132 	int lacp_fast;
133 	unsigned int min_links;
134 	int ad_select;
135 	char primary[IFNAMSIZ];
136 	int primary_reselect;
137 	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
138 	int tx_queues;
139 	int all_slaves_active;
140 	int resend_igmp;
141 	int lp_interval;
142 	int packets_per_slave;
143 	int tlb_dynamic_lb;
144 	struct reciprocal_value reciprocal_packets_per_slave;
145 	u16 ad_actor_sys_prio;
146 	u16 ad_user_port_key;
147 
148 	/* 2 bytes of padding : see ether_addr_equal_64bits() */
149 	u8 ad_actor_system[ETH_ALEN + 2];
150 };
151 
152 struct bond_parm_tbl {
153 	char *modename;
154 	int mode;
155 };
156 
157 struct slave {
158 	struct net_device *dev; /* first - useful for panic debug */
159 	struct bonding *bond; /* our master */
160 	int    delay;
161 	/* all three in jiffies */
162 	unsigned long last_link_up;
163 	unsigned long last_rx;
164 	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
165 	s8     link;		/* one of BOND_LINK_XXXX */
166 	s8     link_new_state;	/* one of BOND_LINK_XXXX */
167 	u8     backup:1,   /* indicates backup slave. Value corresponds with
168 			      BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
169 	       inactive:1, /* indicates inactive slave */
170 	       should_notify:1, /* indicates whether the state changed */
171 	       should_notify_link:1; /* indicates whether the link changed */
172 	u8     duplex;
173 	u32    original_mtu;
174 	u32    link_failure_count;
175 	u32    speed;
176 	u16    queue_id;
177 	u8     perm_hwaddr[MAX_ADDR_LEN];
178 	struct ad_slave_info *ad_info;
179 	struct tlb_slave_info tlb_info;
180 #ifdef CONFIG_NET_POLL_CONTROLLER
181 	struct netpoll *np;
182 #endif
183 	struct delayed_work notify_work;
184 	struct kobject kobj;
185 	struct rtnl_link_stats64 slave_stats;
186 };
187 
188 static inline struct slave *to_slave(struct kobject *kobj)
189 {
190 	return container_of(kobj, struct slave, kobj);
191 }
192 
193 struct bond_up_slave {
194 	unsigned int	count;
195 	struct rcu_head rcu;
196 	struct slave	*arr[];
197 };
198 
199 /*
200  * Link pseudo-state only used internally by monitors
201  */
202 #define BOND_LINK_NOCHANGE -1
203 
204 /*
205  * Here are the locking policies for the two bonding locks:
206  * Get rcu_read_lock when reading or RTNL when writing slave list.
207  */
208 struct bonding {
209 	struct   net_device *dev; /* first - useful for panic debug */
210 	struct   slave __rcu *curr_active_slave;
211 	struct   slave __rcu *current_arp_slave;
212 	struct   slave __rcu *primary_slave;
213 	struct   bond_up_slave __rcu *usable_slaves;
214 	struct   bond_up_slave __rcu *all_slaves;
215 	bool     force_primary;
216 	s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
217 	int     (*recv_probe)(const struct sk_buff *, struct bonding *,
218 			      struct slave *);
219 	/* mode_lock is used for mode-specific locking needs, currently used by:
220 	 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
221 	 *                bond_3ad_state_machine_handler() concurrently and also
222 	 *                the access to the state machine shared variables.
223 	 * TLB mode (5) - to sync the use and modifications of its hash table
224 	 * ALB mode (6) - to sync the use and modifications of its hash table
225 	 */
226 	spinlock_t mode_lock;
227 	spinlock_t stats_lock;
228 	u8	 send_peer_notif;
229 	u8       igmp_retrans;
230 #ifdef CONFIG_PROC_FS
231 	struct   proc_dir_entry *proc_entry;
232 	char     proc_file_name[IFNAMSIZ];
233 #endif /* CONFIG_PROC_FS */
234 	struct   list_head bond_list;
235 	u32      rr_tx_counter;
236 	struct   ad_bond_info ad_info;
237 	struct   alb_bond_info alb_info;
238 	struct   bond_params params;
239 	struct   workqueue_struct *wq;
240 	struct   delayed_work mii_work;
241 	struct   delayed_work arp_work;
242 	struct   delayed_work alb_work;
243 	struct   delayed_work ad_work;
244 	struct   delayed_work mcast_work;
245 	struct   delayed_work slave_arr_work;
246 #ifdef CONFIG_DEBUG_FS
247 	/* debugging support via debugfs */
248 	struct	 dentry *debug_dir;
249 #endif /* CONFIG_DEBUG_FS */
250 	struct rtnl_link_stats64 bond_stats;
251 #ifdef CONFIG_XFRM_OFFLOAD
252 	struct xfrm_state *xs;
253 #endif /* CONFIG_XFRM_OFFLOAD */
254 };
255 
256 #define bond_slave_get_rcu(dev) \
257 	((struct slave *) rcu_dereference(dev->rx_handler_data))
258 
259 #define bond_slave_get_rtnl(dev) \
260 	((struct slave *) rtnl_dereference(dev->rx_handler_data))
261 
262 void bond_queue_slave_event(struct slave *slave);
263 void bond_lower_state_changed(struct slave *slave);
264 
265 struct bond_vlan_tag {
266 	__be16		vlan_proto;
267 	unsigned short	vlan_id;
268 };
269 
270 /**
271  * Returns NULL if the net_device does not belong to any of the bond's slaves
272  *
273  * Caller must hold bond lock for read
274  */
275 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
276 						  struct net_device *slave_dev)
277 {
278 	return netdev_lower_dev_get_private(bond->dev, slave_dev);
279 }
280 
281 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
282 {
283 	return slave->bond;
284 }
285 
286 static inline bool bond_should_override_tx_queue(struct bonding *bond)
287 {
288 	return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
289 	       BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
290 }
291 
292 static inline bool bond_is_lb(const struct bonding *bond)
293 {
294 	return BOND_MODE(bond) == BOND_MODE_TLB ||
295 	       BOND_MODE(bond) == BOND_MODE_ALB;
296 }
297 
298 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
299 {
300 	return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
301 }
302 
303 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
304 {
305 	return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
306 }
307 
308 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
309 {
310 	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
311 		BOND_MODE(bond) == BOND_MODE_XOR ||
312 		BOND_MODE(bond) == BOND_MODE_TLB ||
313 		BOND_MODE(bond) == BOND_MODE_ALB);
314 }
315 
316 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
317 {
318 	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
319 		BOND_MODE(bond) == BOND_MODE_XOR ||
320 		bond_is_nondyn_tlb(bond));
321 }
322 
323 static inline bool bond_mode_uses_arp(int mode)
324 {
325 	return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
326 	       mode != BOND_MODE_ALB;
327 }
328 
329 static inline bool bond_mode_uses_primary(int mode)
330 {
331 	return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
332 	       mode == BOND_MODE_ALB;
333 }
334 
335 static inline bool bond_uses_primary(struct bonding *bond)
336 {
337 	return bond_mode_uses_primary(BOND_MODE(bond));
338 }
339 
340 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
341 {
342 	struct slave *slave = rcu_dereference(bond->curr_active_slave);
343 
344 	return bond_uses_primary(bond) && slave ? slave->dev : NULL;
345 }
346 
347 static inline bool bond_slave_is_up(struct slave *slave)
348 {
349 	return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
350 }
351 
352 static inline void bond_set_active_slave(struct slave *slave)
353 {
354 	if (slave->backup) {
355 		slave->backup = 0;
356 		bond_queue_slave_event(slave);
357 		bond_lower_state_changed(slave);
358 	}
359 }
360 
361 static inline void bond_set_backup_slave(struct slave *slave)
362 {
363 	if (!slave->backup) {
364 		slave->backup = 1;
365 		bond_queue_slave_event(slave);
366 		bond_lower_state_changed(slave);
367 	}
368 }
369 
370 static inline void bond_set_slave_state(struct slave *slave,
371 					int slave_state, bool notify)
372 {
373 	if (slave->backup == slave_state)
374 		return;
375 
376 	slave->backup = slave_state;
377 	if (notify) {
378 		bond_lower_state_changed(slave);
379 		bond_queue_slave_event(slave);
380 		slave->should_notify = 0;
381 	} else {
382 		if (slave->should_notify)
383 			slave->should_notify = 0;
384 		else
385 			slave->should_notify = 1;
386 	}
387 }
388 
389 static inline void bond_slave_state_change(struct bonding *bond)
390 {
391 	struct list_head *iter;
392 	struct slave *tmp;
393 
394 	bond_for_each_slave(bond, tmp, iter) {
395 		if (tmp->link == BOND_LINK_UP)
396 			bond_set_active_slave(tmp);
397 		else if (tmp->link == BOND_LINK_DOWN)
398 			bond_set_backup_slave(tmp);
399 	}
400 }
401 
402 static inline void bond_slave_state_notify(struct bonding *bond)
403 {
404 	struct list_head *iter;
405 	struct slave *tmp;
406 
407 	bond_for_each_slave(bond, tmp, iter) {
408 		if (tmp->should_notify) {
409 			bond_lower_state_changed(tmp);
410 			tmp->should_notify = 0;
411 		}
412 	}
413 }
414 
415 static inline int bond_slave_state(struct slave *slave)
416 {
417 	return slave->backup;
418 }
419 
420 static inline bool bond_is_active_slave(struct slave *slave)
421 {
422 	return !bond_slave_state(slave);
423 }
424 
425 static inline bool bond_slave_can_tx(struct slave *slave)
426 {
427 	return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
428 	       bond_is_active_slave(slave);
429 }
430 
431 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
432 {
433 	struct slave *slave;
434 	bool active;
435 
436 	rcu_read_lock();
437 	slave = bond_slave_get_rcu(slave_dev);
438 	active = bond_is_active_slave(slave);
439 	rcu_read_unlock();
440 
441 	return active;
442 }
443 
444 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
445 {
446 	if (len == ETH_ALEN) {
447 		ether_addr_copy(dst, src);
448 		return;
449 	}
450 
451 	memcpy(dst, src, len);
452 }
453 
454 #define BOND_PRI_RESELECT_ALWAYS	0
455 #define BOND_PRI_RESELECT_BETTER	1
456 #define BOND_PRI_RESELECT_FAILURE	2
457 
458 #define BOND_FOM_NONE			0
459 #define BOND_FOM_ACTIVE			1
460 #define BOND_FOM_FOLLOW			2
461 
462 #define BOND_ARP_TARGETS_ANY		0
463 #define BOND_ARP_TARGETS_ALL		1
464 
465 #define BOND_ARP_VALIDATE_NONE		0
466 #define BOND_ARP_VALIDATE_ACTIVE	(1 << BOND_STATE_ACTIVE)
467 #define BOND_ARP_VALIDATE_BACKUP	(1 << BOND_STATE_BACKUP)
468 #define BOND_ARP_VALIDATE_ALL		(BOND_ARP_VALIDATE_ACTIVE | \
469 					 BOND_ARP_VALIDATE_BACKUP)
470 #define BOND_ARP_FILTER			(BOND_ARP_VALIDATE_ALL + 1)
471 #define BOND_ARP_FILTER_ACTIVE		(BOND_ARP_VALIDATE_ACTIVE | \
472 					 BOND_ARP_FILTER)
473 #define BOND_ARP_FILTER_BACKUP		(BOND_ARP_VALIDATE_BACKUP | \
474 					 BOND_ARP_FILTER)
475 
476 #define BOND_SLAVE_NOTIFY_NOW		true
477 #define BOND_SLAVE_NOTIFY_LATER		false
478 
479 static inline int slave_do_arp_validate(struct bonding *bond,
480 					struct slave *slave)
481 {
482 	return bond->params.arp_validate & (1 << bond_slave_state(slave));
483 }
484 
485 static inline int slave_do_arp_validate_only(struct bonding *bond)
486 {
487 	return bond->params.arp_validate & BOND_ARP_FILTER;
488 }
489 
490 static inline int bond_is_ip_target_ok(__be32 addr)
491 {
492 	return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
493 }
494 
495 /* Get the oldest arp which we've received on this slave for bond's
496  * arp_targets.
497  */
498 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
499 						       struct slave *slave)
500 {
501 	int i = 1;
502 	unsigned long ret = slave->target_last_arp_rx[0];
503 
504 	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
505 		if (time_before(slave->target_last_arp_rx[i], ret))
506 			ret = slave->target_last_arp_rx[i];
507 
508 	return ret;
509 }
510 
511 static inline unsigned long slave_last_rx(struct bonding *bond,
512 					struct slave *slave)
513 {
514 	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
515 		return slave_oldest_target_arp_rx(bond, slave);
516 
517 	return slave->last_rx;
518 }
519 
520 #ifdef CONFIG_NET_POLL_CONTROLLER
521 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
522 					 struct sk_buff *skb)
523 {
524 	return netpoll_send_skb(slave->np, skb);
525 }
526 #else
527 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
528 					 struct sk_buff *skb)
529 {
530 	BUG();
531 	return NETDEV_TX_OK;
532 }
533 #endif
534 
535 static inline void bond_set_slave_inactive_flags(struct slave *slave,
536 						 bool notify)
537 {
538 	if (!bond_is_lb(slave->bond))
539 		bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
540 	if (!slave->bond->params.all_slaves_active)
541 		slave->inactive = 1;
542 }
543 
544 static inline void bond_set_slave_active_flags(struct slave *slave,
545 					       bool notify)
546 {
547 	bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
548 	slave->inactive = 0;
549 }
550 
551 static inline bool bond_is_slave_inactive(struct slave *slave)
552 {
553 	return slave->inactive;
554 }
555 
556 static inline void bond_propose_link_state(struct slave *slave, int state)
557 {
558 	slave->link_new_state = state;
559 }
560 
561 static inline void bond_commit_link_state(struct slave *slave, bool notify)
562 {
563 	if (slave->link_new_state == BOND_LINK_NOCHANGE)
564 		return;
565 
566 	slave->link = slave->link_new_state;
567 	if (notify) {
568 		bond_queue_slave_event(slave);
569 		bond_lower_state_changed(slave);
570 		slave->should_notify_link = 0;
571 	} else {
572 		if (slave->should_notify_link)
573 			slave->should_notify_link = 0;
574 		else
575 			slave->should_notify_link = 1;
576 	}
577 }
578 
579 static inline void bond_set_slave_link_state(struct slave *slave, int state,
580 					     bool notify)
581 {
582 	bond_propose_link_state(slave, state);
583 	bond_commit_link_state(slave, notify);
584 }
585 
586 static inline void bond_slave_link_notify(struct bonding *bond)
587 {
588 	struct list_head *iter;
589 	struct slave *tmp;
590 
591 	bond_for_each_slave(bond, tmp, iter) {
592 		if (tmp->should_notify_link) {
593 			bond_queue_slave_event(tmp);
594 			bond_lower_state_changed(tmp);
595 			tmp->should_notify_link = 0;
596 		}
597 	}
598 }
599 
600 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
601 {
602 	struct in_device *in_dev;
603 	__be32 addr = 0;
604 
605 	rcu_read_lock();
606 	in_dev = __in_dev_get_rcu(dev);
607 
608 	if (in_dev)
609 		addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
610 					 RT_SCOPE_HOST);
611 	rcu_read_unlock();
612 	return addr;
613 }
614 
615 struct bond_net {
616 	struct net		*net;	/* Associated network namespace */
617 	struct list_head	dev_list;
618 #ifdef CONFIG_PROC_FS
619 	struct proc_dir_entry	*proc_dir;
620 #endif
621 	struct class_attribute	class_attr_bonding_masters;
622 };
623 
624 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
625 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
626 int bond_create(struct net *net, const char *name);
627 int bond_create_sysfs(struct bond_net *net);
628 void bond_destroy_sysfs(struct bond_net *net);
629 void bond_prepare_sysfs_group(struct bonding *bond);
630 int bond_sysfs_slave_add(struct slave *slave);
631 void bond_sysfs_slave_del(struct slave *slave);
632 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
633 		 struct netlink_ext_ack *extack);
634 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
635 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
636 int bond_set_carrier(struct bonding *bond);
637 void bond_select_active_slave(struct bonding *bond);
638 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
639 void bond_create_debugfs(void);
640 void bond_destroy_debugfs(void);
641 void bond_debug_register(struct bonding *bond);
642 void bond_debug_unregister(struct bonding *bond);
643 void bond_debug_reregister(struct bonding *bond);
644 const char *bond_mode_name(int mode);
645 void bond_setup(struct net_device *bond_dev);
646 unsigned int bond_get_num_tx_queues(void);
647 int bond_netlink_init(void);
648 void bond_netlink_fini(void);
649 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
650 const char *bond_slave_link_status(s8 link);
651 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
652 					      struct net_device *end_dev,
653 					      int level);
654 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
655 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
656 void bond_work_init_all(struct bonding *bond);
657 
658 #ifdef CONFIG_PROC_FS
659 void bond_create_proc_entry(struct bonding *bond);
660 void bond_remove_proc_entry(struct bonding *bond);
661 void bond_create_proc_dir(struct bond_net *bn);
662 void bond_destroy_proc_dir(struct bond_net *bn);
663 #else
664 static inline void bond_create_proc_entry(struct bonding *bond)
665 {
666 }
667 
668 static inline void bond_remove_proc_entry(struct bonding *bond)
669 {
670 }
671 
672 static inline void bond_create_proc_dir(struct bond_net *bn)
673 {
674 }
675 
676 static inline void bond_destroy_proc_dir(struct bond_net *bn)
677 {
678 }
679 #endif
680 
681 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
682 					       const u8 *mac)
683 {
684 	struct list_head *iter;
685 	struct slave *tmp;
686 
687 	bond_for_each_slave(bond, tmp, iter)
688 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
689 			return tmp;
690 
691 	return NULL;
692 }
693 
694 /* Caller must hold rcu_read_lock() for read */
695 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
696 					       const u8 *mac)
697 {
698 	struct list_head *iter;
699 	struct slave *tmp;
700 
701 	bond_for_each_slave_rcu(bond, tmp, iter)
702 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
703 			return tmp;
704 
705 	return NULL;
706 }
707 
708 /* Caller must hold rcu_read_lock() for read */
709 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
710 {
711 	struct list_head *iter;
712 	struct slave *tmp;
713 	struct netdev_hw_addr *ha;
714 
715 	bond_for_each_slave_rcu(bond, tmp, iter)
716 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
717 			return true;
718 
719 	if (netdev_uc_empty(bond->dev))
720 		return false;
721 
722 	netdev_for_each_uc_addr(ha, bond->dev)
723 		if (ether_addr_equal_64bits(mac, ha->addr))
724 			return true;
725 
726 	return false;
727 }
728 
729 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
730  * Returns -1 if not found, index if found
731  */
732 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
733 {
734 	int i;
735 
736 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
737 		if (targets[i] == ip)
738 			return i;
739 		else if (targets[i] == 0)
740 			break;
741 
742 	return -1;
743 }
744 
745 /* exported from bond_main.c */
746 extern unsigned int bond_net_id;
747 extern const struct bond_parm_tbl bond_lacp_tbl[];
748 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
749 extern const struct bond_parm_tbl arp_validate_tbl[];
750 extern const struct bond_parm_tbl arp_all_targets_tbl[];
751 extern const struct bond_parm_tbl fail_over_mac_tbl[];
752 extern const struct bond_parm_tbl pri_reselect_tbl[];
753 extern struct bond_parm_tbl ad_select_tbl[];
754 
755 /* exported from bond_netlink.c */
756 extern struct rtnl_link_ops bond_link_ops;
757 
758 /* exported from bond_sysfs_slave.c */
759 extern const struct sysfs_ops slave_sysfs_ops;
760 
761 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
762 {
763 	atomic_long_inc(&dev->tx_dropped);
764 	dev_kfree_skb_any(skb);
765 	return NET_XMIT_DROP;
766 }
767 
768 #endif /* _NET_BONDING_H */
769