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 BOND_MODE(bond) ((bond)->params.mode)
42 
43 /* slave list primitives */
44 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
45 
46 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
47 
48 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
49 #define bond_first_slave(bond) \
50 	(bond_has_slaves(bond) ? \
51 		netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
52 		NULL)
53 #define bond_last_slave(bond) \
54 	(bond_has_slaves(bond) ? \
55 		netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
56 		NULL)
57 
58 /* Caller must have rcu_read_lock */
59 #define bond_first_slave_rcu(bond) \
60 	netdev_lower_get_first_private_rcu(bond->dev)
61 
62 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
63 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
64 
65 /**
66  * bond_for_each_slave - iterate over all slaves
67  * @bond:	the bond holding this list
68  * @pos:	current slave
69  * @iter:	list_head * iterator
70  *
71  * Caller must hold RTNL
72  */
73 #define bond_for_each_slave(bond, pos, iter) \
74 	netdev_for_each_lower_private((bond)->dev, pos, iter)
75 
76 /* Caller must have rcu_read_lock */
77 #define bond_for_each_slave_rcu(bond, pos, iter) \
78 	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
79 
80 #ifdef CONFIG_NET_POLL_CONTROLLER
81 extern atomic_t netpoll_block_tx;
82 
block_netpoll_tx(void)83 static inline void block_netpoll_tx(void)
84 {
85 	atomic_inc(&netpoll_block_tx);
86 }
87 
unblock_netpoll_tx(void)88 static inline void unblock_netpoll_tx(void)
89 {
90 	atomic_dec(&netpoll_block_tx);
91 }
92 
is_netpoll_tx_blocked(struct net_device * dev)93 static inline int is_netpoll_tx_blocked(struct net_device *dev)
94 {
95 	if (unlikely(netpoll_tx_running(dev)))
96 		return atomic_read(&netpoll_block_tx);
97 	return 0;
98 }
99 #else
100 #define block_netpoll_tx()
101 #define unblock_netpoll_tx()
102 #define is_netpoll_tx_blocked(dev) (0)
103 #endif
104 
105 struct bond_params {
106 	int mode;
107 	int xmit_policy;
108 	int miimon;
109 	u8 num_peer_notif;
110 	int arp_interval;
111 	int arp_validate;
112 	int arp_all_targets;
113 	int use_carrier;
114 	int fail_over_mac;
115 	int updelay;
116 	int downdelay;
117 	int lacp_fast;
118 	unsigned int min_links;
119 	int ad_select;
120 	char primary[IFNAMSIZ];
121 	int primary_reselect;
122 	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
123 	int tx_queues;
124 	int all_slaves_active;
125 	int resend_igmp;
126 	int lp_interval;
127 	int packets_per_slave;
128 	int tlb_dynamic_lb;
129 	struct reciprocal_value reciprocal_packets_per_slave;
130 	u16 ad_actor_sys_prio;
131 	u16 ad_user_port_key;
132 
133 	/* 2 bytes of padding : see ether_addr_equal_64bits() */
134 	u8 ad_actor_system[ETH_ALEN + 2];
135 };
136 
137 struct bond_parm_tbl {
138 	char *modename;
139 	int mode;
140 };
141 
142 struct slave {
143 	struct net_device *dev; /* first - useful for panic debug */
144 	struct bonding *bond; /* our master */
145 	int    delay;
146 	/* all three in jiffies */
147 	unsigned long last_link_up;
148 	unsigned long last_rx;
149 	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
150 	s8     link;		/* one of BOND_LINK_XXXX */
151 	s8     link_new_state;	/* one of BOND_LINK_XXXX */
152 	u8     backup:1,   /* indicates backup slave. Value corresponds with
153 			      BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
154 	       inactive:1, /* indicates inactive slave */
155 	       should_notify:1, /* indicates whether the state changed */
156 	       should_notify_link:1; /* indicates whether the link changed */
157 	u8     duplex;
158 	u32    original_mtu;
159 	u32    link_failure_count;
160 	u32    speed;
161 	u16    queue_id;
162 	u8     perm_hwaddr[MAX_ADDR_LEN];
163 	struct ad_slave_info *ad_info;
164 	struct tlb_slave_info tlb_info;
165 #ifdef CONFIG_NET_POLL_CONTROLLER
166 	struct netpoll *np;
167 #endif
168 	struct delayed_work notify_work;
169 	struct kobject kobj;
170 	struct rtnl_link_stats64 slave_stats;
171 };
172 
to_slave(struct kobject * kobj)173 static inline struct slave *to_slave(struct kobject *kobj)
174 {
175 	return container_of(kobj, struct slave, kobj);
176 }
177 
178 struct bond_up_slave {
179 	unsigned int	count;
180 	struct rcu_head rcu;
181 	struct slave	*arr[0];
182 };
183 
184 /*
185  * Link pseudo-state only used internally by monitors
186  */
187 #define BOND_LINK_NOCHANGE -1
188 
189 /*
190  * Here are the locking policies for the two bonding locks:
191  * Get rcu_read_lock when reading or RTNL when writing slave list.
192  */
193 struct bonding {
194 	struct   net_device *dev; /* first - useful for panic debug */
195 	struct   slave __rcu *curr_active_slave;
196 	struct   slave __rcu *current_arp_slave;
197 	struct   slave __rcu *primary_slave;
198 	struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
199 	bool     force_primary;
200 	u32      nest_level;
201 	s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
202 	int     (*recv_probe)(const struct sk_buff *, struct bonding *,
203 			      struct slave *);
204 	/* mode_lock is used for mode-specific locking needs, currently used by:
205 	 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
206 	 *                bond_3ad_state_machine_handler() concurrently and also
207 	 *                the access to the state machine shared variables.
208 	 * TLB mode (5) - to sync the use and modifications of its hash table
209 	 * ALB mode (6) - to sync the use and modifications of its hash table
210 	 */
211 	spinlock_t mode_lock;
212 	spinlock_t stats_lock;
213 	u8	 send_peer_notif;
214 	u8       igmp_retrans;
215 #ifdef CONFIG_PROC_FS
216 	struct   proc_dir_entry *proc_entry;
217 	char     proc_file_name[IFNAMSIZ];
218 #endif /* CONFIG_PROC_FS */
219 	struct   list_head bond_list;
220 	u32      rr_tx_counter;
221 	struct   ad_bond_info ad_info;
222 	struct   alb_bond_info alb_info;
223 	struct   bond_params params;
224 	struct   workqueue_struct *wq;
225 	struct   delayed_work mii_work;
226 	struct   delayed_work arp_work;
227 	struct   delayed_work alb_work;
228 	struct   delayed_work ad_work;
229 	struct   delayed_work mcast_work;
230 	struct   delayed_work slave_arr_work;
231 #ifdef CONFIG_DEBUG_FS
232 	/* debugging support via debugfs */
233 	struct	 dentry *debug_dir;
234 #endif /* CONFIG_DEBUG_FS */
235 	struct rtnl_link_stats64 bond_stats;
236 };
237 
238 #define bond_slave_get_rcu(dev) \
239 	((struct slave *) rcu_dereference(dev->rx_handler_data))
240 
241 #define bond_slave_get_rtnl(dev) \
242 	((struct slave *) rtnl_dereference(dev->rx_handler_data))
243 
244 void bond_queue_slave_event(struct slave *slave);
245 void bond_lower_state_changed(struct slave *slave);
246 
247 struct bond_vlan_tag {
248 	__be16		vlan_proto;
249 	unsigned short	vlan_id;
250 };
251 
252 /**
253  * Returns NULL if the net_device does not belong to any of the bond's slaves
254  *
255  * Caller must hold bond lock for read
256  */
bond_get_slave_by_dev(struct bonding * bond,struct net_device * slave_dev)257 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
258 						  struct net_device *slave_dev)
259 {
260 	return netdev_lower_dev_get_private(bond->dev, slave_dev);
261 }
262 
bond_get_bond_by_slave(struct slave * slave)263 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
264 {
265 	return slave->bond;
266 }
267 
bond_should_override_tx_queue(struct bonding * bond)268 static inline bool bond_should_override_tx_queue(struct bonding *bond)
269 {
270 	return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
271 	       BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
272 }
273 
bond_is_lb(const struct bonding * bond)274 static inline bool bond_is_lb(const struct bonding *bond)
275 {
276 	return BOND_MODE(bond) == BOND_MODE_TLB ||
277 	       BOND_MODE(bond) == BOND_MODE_ALB;
278 }
279 
bond_needs_speed_duplex(const struct bonding * bond)280 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
281 {
282 	return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
283 }
284 
bond_is_nondyn_tlb(const struct bonding * bond)285 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
286 {
287 	return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
288 }
289 
bond_mode_can_use_xmit_hash(const struct bonding * bond)290 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
291 {
292 	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
293 		BOND_MODE(bond) == BOND_MODE_XOR ||
294 		BOND_MODE(bond) == BOND_MODE_TLB ||
295 		BOND_MODE(bond) == BOND_MODE_ALB);
296 }
297 
bond_mode_uses_xmit_hash(const struct bonding * bond)298 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
299 {
300 	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
301 		BOND_MODE(bond) == BOND_MODE_XOR ||
302 		bond_is_nondyn_tlb(bond));
303 }
304 
bond_mode_uses_arp(int mode)305 static inline bool bond_mode_uses_arp(int mode)
306 {
307 	return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
308 	       mode != BOND_MODE_ALB;
309 }
310 
bond_mode_uses_primary(int mode)311 static inline bool bond_mode_uses_primary(int mode)
312 {
313 	return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
314 	       mode == BOND_MODE_ALB;
315 }
316 
bond_uses_primary(struct bonding * bond)317 static inline bool bond_uses_primary(struct bonding *bond)
318 {
319 	return bond_mode_uses_primary(BOND_MODE(bond));
320 }
321 
bond_option_active_slave_get_rcu(struct bonding * bond)322 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
323 {
324 	struct slave *slave = rcu_dereference(bond->curr_active_slave);
325 
326 	return bond_uses_primary(bond) && slave ? slave->dev : NULL;
327 }
328 
bond_slave_is_up(struct slave * slave)329 static inline bool bond_slave_is_up(struct slave *slave)
330 {
331 	return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
332 }
333 
bond_set_active_slave(struct slave * slave)334 static inline void bond_set_active_slave(struct slave *slave)
335 {
336 	if (slave->backup) {
337 		slave->backup = 0;
338 		bond_queue_slave_event(slave);
339 		bond_lower_state_changed(slave);
340 	}
341 }
342 
bond_set_backup_slave(struct slave * slave)343 static inline void bond_set_backup_slave(struct slave *slave)
344 {
345 	if (!slave->backup) {
346 		slave->backup = 1;
347 		bond_queue_slave_event(slave);
348 		bond_lower_state_changed(slave);
349 	}
350 }
351 
bond_set_slave_state(struct slave * slave,int slave_state,bool notify)352 static inline void bond_set_slave_state(struct slave *slave,
353 					int slave_state, bool notify)
354 {
355 	if (slave->backup == slave_state)
356 		return;
357 
358 	slave->backup = slave_state;
359 	if (notify) {
360 		bond_lower_state_changed(slave);
361 		bond_queue_slave_event(slave);
362 		slave->should_notify = 0;
363 	} else {
364 		if (slave->should_notify)
365 			slave->should_notify = 0;
366 		else
367 			slave->should_notify = 1;
368 	}
369 }
370 
bond_slave_state_change(struct bonding * bond)371 static inline void bond_slave_state_change(struct bonding *bond)
372 {
373 	struct list_head *iter;
374 	struct slave *tmp;
375 
376 	bond_for_each_slave(bond, tmp, iter) {
377 		if (tmp->link == BOND_LINK_UP)
378 			bond_set_active_slave(tmp);
379 		else if (tmp->link == BOND_LINK_DOWN)
380 			bond_set_backup_slave(tmp);
381 	}
382 }
383 
bond_slave_state_notify(struct bonding * bond)384 static inline void bond_slave_state_notify(struct bonding *bond)
385 {
386 	struct list_head *iter;
387 	struct slave *tmp;
388 
389 	bond_for_each_slave(bond, tmp, iter) {
390 		if (tmp->should_notify) {
391 			bond_lower_state_changed(tmp);
392 			tmp->should_notify = 0;
393 		}
394 	}
395 }
396 
bond_slave_state(struct slave * slave)397 static inline int bond_slave_state(struct slave *slave)
398 {
399 	return slave->backup;
400 }
401 
bond_is_active_slave(struct slave * slave)402 static inline bool bond_is_active_slave(struct slave *slave)
403 {
404 	return !bond_slave_state(slave);
405 }
406 
bond_slave_can_tx(struct slave * slave)407 static inline bool bond_slave_can_tx(struct slave *slave)
408 {
409 	return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
410 	       bond_is_active_slave(slave);
411 }
412 
bond_is_active_slave_dev(const struct net_device * slave_dev)413 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
414 {
415 	struct slave *slave;
416 	bool active;
417 
418 	rcu_read_lock();
419 	slave = bond_slave_get_rcu(slave_dev);
420 	active = bond_is_active_slave(slave);
421 	rcu_read_unlock();
422 
423 	return active;
424 }
425 
bond_hw_addr_copy(u8 * dst,const u8 * src,unsigned int len)426 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
427 {
428 	if (len == ETH_ALEN) {
429 		ether_addr_copy(dst, src);
430 		return;
431 	}
432 
433 	memcpy(dst, src, len);
434 }
435 
436 #define BOND_PRI_RESELECT_ALWAYS	0
437 #define BOND_PRI_RESELECT_BETTER	1
438 #define BOND_PRI_RESELECT_FAILURE	2
439 
440 #define BOND_FOM_NONE			0
441 #define BOND_FOM_ACTIVE			1
442 #define BOND_FOM_FOLLOW			2
443 
444 #define BOND_ARP_TARGETS_ANY		0
445 #define BOND_ARP_TARGETS_ALL		1
446 
447 #define BOND_ARP_VALIDATE_NONE		0
448 #define BOND_ARP_VALIDATE_ACTIVE	(1 << BOND_STATE_ACTIVE)
449 #define BOND_ARP_VALIDATE_BACKUP	(1 << BOND_STATE_BACKUP)
450 #define BOND_ARP_VALIDATE_ALL		(BOND_ARP_VALIDATE_ACTIVE | \
451 					 BOND_ARP_VALIDATE_BACKUP)
452 #define BOND_ARP_FILTER			(BOND_ARP_VALIDATE_ALL + 1)
453 #define BOND_ARP_FILTER_ACTIVE		(BOND_ARP_VALIDATE_ACTIVE | \
454 					 BOND_ARP_FILTER)
455 #define BOND_ARP_FILTER_BACKUP		(BOND_ARP_VALIDATE_BACKUP | \
456 					 BOND_ARP_FILTER)
457 
458 #define BOND_SLAVE_NOTIFY_NOW		true
459 #define BOND_SLAVE_NOTIFY_LATER		false
460 
slave_do_arp_validate(struct bonding * bond,struct slave * slave)461 static inline int slave_do_arp_validate(struct bonding *bond,
462 					struct slave *slave)
463 {
464 	return bond->params.arp_validate & (1 << bond_slave_state(slave));
465 }
466 
slave_do_arp_validate_only(struct bonding * bond)467 static inline int slave_do_arp_validate_only(struct bonding *bond)
468 {
469 	return bond->params.arp_validate & BOND_ARP_FILTER;
470 }
471 
bond_is_ip_target_ok(__be32 addr)472 static inline int bond_is_ip_target_ok(__be32 addr)
473 {
474 	return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
475 }
476 
477 /* Get the oldest arp which we've received on this slave for bond's
478  * arp_targets.
479  */
slave_oldest_target_arp_rx(struct bonding * bond,struct slave * slave)480 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
481 						       struct slave *slave)
482 {
483 	int i = 1;
484 	unsigned long ret = slave->target_last_arp_rx[0];
485 
486 	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
487 		if (time_before(slave->target_last_arp_rx[i], ret))
488 			ret = slave->target_last_arp_rx[i];
489 
490 	return ret;
491 }
492 
slave_last_rx(struct bonding * bond,struct slave * slave)493 static inline unsigned long slave_last_rx(struct bonding *bond,
494 					struct slave *slave)
495 {
496 	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
497 		return slave_oldest_target_arp_rx(bond, slave);
498 
499 	return slave->last_rx;
500 }
501 
502 #ifdef CONFIG_NET_POLL_CONTROLLER
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)503 static inline void bond_netpoll_send_skb(const struct slave *slave,
504 					 struct sk_buff *skb)
505 {
506 	struct netpoll *np = slave->np;
507 
508 	if (np)
509 		netpoll_send_skb(np, skb);
510 }
511 #else
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)512 static inline void bond_netpoll_send_skb(const struct slave *slave,
513 					 struct sk_buff *skb)
514 {
515 }
516 #endif
517 
bond_set_slave_inactive_flags(struct slave * slave,bool notify)518 static inline void bond_set_slave_inactive_flags(struct slave *slave,
519 						 bool notify)
520 {
521 	if (!bond_is_lb(slave->bond))
522 		bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
523 	if (!slave->bond->params.all_slaves_active)
524 		slave->inactive = 1;
525 }
526 
bond_set_slave_active_flags(struct slave * slave,bool notify)527 static inline void bond_set_slave_active_flags(struct slave *slave,
528 					       bool notify)
529 {
530 	bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
531 	slave->inactive = 0;
532 }
533 
bond_is_slave_inactive(struct slave * slave)534 static inline bool bond_is_slave_inactive(struct slave *slave)
535 {
536 	return slave->inactive;
537 }
538 
bond_propose_link_state(struct slave * slave,int state)539 static inline void bond_propose_link_state(struct slave *slave, int state)
540 {
541 	slave->link_new_state = state;
542 }
543 
bond_commit_link_state(struct slave * slave,bool notify)544 static inline void bond_commit_link_state(struct slave *slave, bool notify)
545 {
546 	if (slave->link_new_state == BOND_LINK_NOCHANGE)
547 		return;
548 
549 	slave->link = slave->link_new_state;
550 	if (notify) {
551 		bond_queue_slave_event(slave);
552 		bond_lower_state_changed(slave);
553 		slave->should_notify_link = 0;
554 	} else {
555 		if (slave->should_notify_link)
556 			slave->should_notify_link = 0;
557 		else
558 			slave->should_notify_link = 1;
559 	}
560 }
561 
bond_set_slave_link_state(struct slave * slave,int state,bool notify)562 static inline void bond_set_slave_link_state(struct slave *slave, int state,
563 					     bool notify)
564 {
565 	bond_propose_link_state(slave, state);
566 	bond_commit_link_state(slave, notify);
567 }
568 
bond_slave_link_notify(struct bonding * bond)569 static inline void bond_slave_link_notify(struct bonding *bond)
570 {
571 	struct list_head *iter;
572 	struct slave *tmp;
573 
574 	bond_for_each_slave(bond, tmp, iter) {
575 		if (tmp->should_notify_link) {
576 			bond_queue_slave_event(tmp);
577 			bond_lower_state_changed(tmp);
578 			tmp->should_notify_link = 0;
579 		}
580 	}
581 }
582 
bond_confirm_addr(struct net_device * dev,__be32 dst,__be32 local)583 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
584 {
585 	struct in_device *in_dev;
586 	__be32 addr = 0;
587 
588 	rcu_read_lock();
589 	in_dev = __in_dev_get_rcu(dev);
590 
591 	if (in_dev)
592 		addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
593 					 RT_SCOPE_HOST);
594 	rcu_read_unlock();
595 	return addr;
596 }
597 
598 struct bond_net {
599 	struct net		*net;	/* Associated network namespace */
600 	struct list_head	dev_list;
601 #ifdef CONFIG_PROC_FS
602 	struct proc_dir_entry	*proc_dir;
603 #endif
604 	struct class_attribute	class_attr_bonding_masters;
605 };
606 
607 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
608 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
609 int bond_create(struct net *net, const char *name);
610 int bond_create_sysfs(struct bond_net *net);
611 void bond_destroy_sysfs(struct bond_net *net);
612 void bond_prepare_sysfs_group(struct bonding *bond);
613 int bond_sysfs_slave_add(struct slave *slave);
614 void bond_sysfs_slave_del(struct slave *slave);
615 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
616 		 struct netlink_ext_ack *extack);
617 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
618 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
619 int bond_set_carrier(struct bonding *bond);
620 void bond_select_active_slave(struct bonding *bond);
621 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
622 void bond_create_debugfs(void);
623 void bond_destroy_debugfs(void);
624 void bond_debug_register(struct bonding *bond);
625 void bond_debug_unregister(struct bonding *bond);
626 void bond_debug_reregister(struct bonding *bond);
627 const char *bond_mode_name(int mode);
628 void bond_setup(struct net_device *bond_dev);
629 unsigned int bond_get_num_tx_queues(void);
630 int bond_netlink_init(void);
631 void bond_netlink_fini(void);
632 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
633 const char *bond_slave_link_status(s8 link);
634 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
635 					      struct net_device *end_dev,
636 					      int level);
637 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
638 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
639 void bond_work_init_all(struct bonding *bond);
640 
641 #ifdef CONFIG_PROC_FS
642 void bond_create_proc_entry(struct bonding *bond);
643 void bond_remove_proc_entry(struct bonding *bond);
644 void bond_create_proc_dir(struct bond_net *bn);
645 void bond_destroy_proc_dir(struct bond_net *bn);
646 #else
bond_create_proc_entry(struct bonding * bond)647 static inline void bond_create_proc_entry(struct bonding *bond)
648 {
649 }
650 
bond_remove_proc_entry(struct bonding * bond)651 static inline void bond_remove_proc_entry(struct bonding *bond)
652 {
653 }
654 
bond_create_proc_dir(struct bond_net * bn)655 static inline void bond_create_proc_dir(struct bond_net *bn)
656 {
657 }
658 
bond_destroy_proc_dir(struct bond_net * bn)659 static inline void bond_destroy_proc_dir(struct bond_net *bn)
660 {
661 }
662 #endif
663 
bond_slave_has_mac(struct bonding * bond,const u8 * mac)664 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
665 					       const u8 *mac)
666 {
667 	struct list_head *iter;
668 	struct slave *tmp;
669 
670 	bond_for_each_slave(bond, tmp, iter)
671 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
672 			return tmp;
673 
674 	return NULL;
675 }
676 
677 /* Caller must hold rcu_read_lock() for read */
bond_slave_has_mac_rcu(struct bonding * bond,const u8 * mac)678 static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac)
679 {
680 	struct list_head *iter;
681 	struct slave *tmp;
682 
683 	bond_for_each_slave_rcu(bond, tmp, iter)
684 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
685 			return true;
686 	return false;
687 }
688 
689 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
690  * Returns -1 if not found, index if found
691  */
bond_get_targets_ip(__be32 * targets,__be32 ip)692 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
693 {
694 	int i;
695 
696 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
697 		if (targets[i] == ip)
698 			return i;
699 		else if (targets[i] == 0)
700 			break;
701 
702 	return -1;
703 }
704 
705 /* exported from bond_main.c */
706 extern unsigned int bond_net_id;
707 extern const struct bond_parm_tbl bond_lacp_tbl[];
708 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
709 extern const struct bond_parm_tbl arp_validate_tbl[];
710 extern const struct bond_parm_tbl arp_all_targets_tbl[];
711 extern const struct bond_parm_tbl fail_over_mac_tbl[];
712 extern const struct bond_parm_tbl pri_reselect_tbl[];
713 extern struct bond_parm_tbl ad_select_tbl[];
714 
715 /* exported from bond_netlink.c */
716 extern struct rtnl_link_ops bond_link_ops;
717 
718 /* exported from bond_sysfs_slave.c */
719 extern const struct sysfs_ops slave_sysfs_ops;
720 
bond_tx_drop(struct net_device * dev,struct sk_buff * skb)721 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
722 {
723 	atomic_long_inc(&dev->tx_dropped);
724 	dev_kfree_skb_any(skb);
725 }
726 
727 #endif /* _NET_BONDING_H */
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