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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
83 static inline void block_netpoll_tx(void)
84 {
85 atomic_inc(&netpoll_block_tx);
86 }
87
88 static inline void unblock_netpoll_tx(void)
89 {
90 atomic_dec(&netpoll_block_tx);
91 }
92
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 netdev_notify_work {
143 struct delayed_work work;
144 struct net_device *dev;
145 struct netdev_bonding_info bonding_info;
146 };
147
148 struct slave {
149 struct net_device *dev; /* first - useful for panic debug */
150 struct bonding *bond; /* our master */
151 int delay;
152 /* all three in jiffies */
153 unsigned long last_link_up;
154 unsigned long last_rx;
155 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
156 s8 link; /* one of BOND_LINK_XXXX */
157 s8 link_new_state; /* one of BOND_LINK_XXXX */
158 s8 new_link;
159 u8 backup:1, /* indicates backup slave. Value corresponds with
160 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
161 inactive:1, /* indicates inactive slave */
162 should_notify:1, /* indicates whether the state changed */
163 should_notify_link:1; /* indicates whether the link changed */
164 u8 duplex;
165 u32 original_mtu;
166 u32 link_failure_count;
167 u32 speed;
168 u16 queue_id;
169 u8 perm_hwaddr[MAX_ADDR_LEN];
170 struct ad_slave_info *ad_info;
171 struct tlb_slave_info tlb_info;
172 #ifdef CONFIG_NET_POLL_CONTROLLER
173 struct netpoll *np;
174 #endif
175 struct kobject kobj;
176 struct rtnl_link_stats64 slave_stats;
177 };
178
179 struct bond_up_slave {
180 unsigned int count;
181 struct rcu_head rcu;
182 struct slave *arr[0];
183 };
184
185 /*
186 * Link pseudo-state only used internally by monitors
187 */
188 #define BOND_LINK_NOCHANGE -1
189
190 /*
191 * Here are the locking policies for the two bonding locks:
192 * Get rcu_read_lock when reading or RTNL when writing slave list.
193 */
194 struct bonding {
195 struct net_device *dev; /* first - useful for panic debug */
196 struct slave __rcu *curr_active_slave;
197 struct slave __rcu *current_arp_slave;
198 struct slave __rcu *primary_slave;
199 struct bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
200 bool force_primary;
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 */
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
263 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
264 {
265 return slave->bond;
266 }
267
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
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
280 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
281 {
282 return (BOND_MODE(bond) == BOND_MODE_TLB) &&
283 (bond->params.tlb_dynamic_lb == 0);
284 }
285
286 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
287 {
288 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
289 BOND_MODE(bond) == BOND_MODE_XOR ||
290 bond_is_nondyn_tlb(bond));
291 }
292
293 static inline bool bond_mode_uses_arp(int mode)
294 {
295 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
296 mode != BOND_MODE_ALB;
297 }
298
299 static inline bool bond_mode_uses_primary(int mode)
300 {
301 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
302 mode == BOND_MODE_ALB;
303 }
304
305 static inline bool bond_uses_primary(struct bonding *bond)
306 {
307 return bond_mode_uses_primary(BOND_MODE(bond));
308 }
309
310 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
311 {
312 struct slave *slave = rcu_dereference(bond->curr_active_slave);
313
314 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
315 }
316
317 static inline bool bond_slave_is_up(struct slave *slave)
318 {
319 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
320 }
321
322 static inline void bond_set_active_slave(struct slave *slave)
323 {
324 if (slave->backup) {
325 slave->backup = 0;
326 bond_queue_slave_event(slave);
327 bond_lower_state_changed(slave);
328 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
329 }
330 }
331
332 static inline void bond_set_backup_slave(struct slave *slave)
333 {
334 if (!slave->backup) {
335 slave->backup = 1;
336 bond_queue_slave_event(slave);
337 bond_lower_state_changed(slave);
338 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
339 }
340 }
341
342 static inline void bond_set_slave_state(struct slave *slave,
343 int slave_state, bool notify)
344 {
345 if (slave->backup == slave_state)
346 return;
347
348 slave->backup = slave_state;
349 if (notify) {
350 bond_lower_state_changed(slave);
351 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
352 bond_queue_slave_event(slave);
353 slave->should_notify = 0;
354 } else {
355 if (slave->should_notify)
356 slave->should_notify = 0;
357 else
358 slave->should_notify = 1;
359 }
360 }
361
362 static inline void bond_slave_state_change(struct bonding *bond)
363 {
364 struct list_head *iter;
365 struct slave *tmp;
366
367 bond_for_each_slave(bond, tmp, iter) {
368 if (tmp->link == BOND_LINK_UP)
369 bond_set_active_slave(tmp);
370 else if (tmp->link == BOND_LINK_DOWN)
371 bond_set_backup_slave(tmp);
372 }
373 }
374
375 static inline void bond_slave_state_notify(struct bonding *bond)
376 {
377 struct list_head *iter;
378 struct slave *tmp;
379
380 bond_for_each_slave(bond, tmp, iter) {
381 if (tmp->should_notify) {
382 bond_lower_state_changed(tmp);
383 rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
384 tmp->should_notify = 0;
385 }
386 }
387 }
388
389 static inline int bond_slave_state(struct slave *slave)
390 {
391 return slave->backup;
392 }
393
394 static inline bool bond_is_active_slave(struct slave *slave)
395 {
396 return !bond_slave_state(slave);
397 }
398
399 static inline bool bond_slave_can_tx(struct slave *slave)
400 {
401 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
402 bond_is_active_slave(slave);
403 }
404
405 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
406 {
407 if (len == ETH_ALEN) {
408 ether_addr_copy(dst, src);
409 return;
410 }
411
412 memcpy(dst, src, len);
413 }
414
415 #define BOND_PRI_RESELECT_ALWAYS 0
416 #define BOND_PRI_RESELECT_BETTER 1
417 #define BOND_PRI_RESELECT_FAILURE 2
418
419 #define BOND_FOM_NONE 0
420 #define BOND_FOM_ACTIVE 1
421 #define BOND_FOM_FOLLOW 2
422
423 #define BOND_ARP_TARGETS_ANY 0
424 #define BOND_ARP_TARGETS_ALL 1
425
426 #define BOND_ARP_VALIDATE_NONE 0
427 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
428 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
429 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
430 BOND_ARP_VALIDATE_BACKUP)
431 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
432 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
433 BOND_ARP_FILTER)
434 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
435 BOND_ARP_FILTER)
436
437 #define BOND_SLAVE_NOTIFY_NOW true
438 #define BOND_SLAVE_NOTIFY_LATER false
439
440 static inline int slave_do_arp_validate(struct bonding *bond,
441 struct slave *slave)
442 {
443 return bond->params.arp_validate & (1 << bond_slave_state(slave));
444 }
445
446 static inline int slave_do_arp_validate_only(struct bonding *bond)
447 {
448 return bond->params.arp_validate & BOND_ARP_FILTER;
449 }
450
451 static inline int bond_is_ip_target_ok(__be32 addr)
452 {
453 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
454 }
455
456 /* Get the oldest arp which we've received on this slave for bond's
457 * arp_targets.
458 */
459 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
460 struct slave *slave)
461 {
462 int i = 1;
463 unsigned long ret = slave->target_last_arp_rx[0];
464
465 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
466 if (time_before(slave->target_last_arp_rx[i], ret))
467 ret = slave->target_last_arp_rx[i];
468
469 return ret;
470 }
471
472 static inline unsigned long slave_last_rx(struct bonding *bond,
473 struct slave *slave)
474 {
475 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
476 return slave_oldest_target_arp_rx(bond, slave);
477
478 return slave->last_rx;
479 }
480
481 #ifdef CONFIG_NET_POLL_CONTROLLER
482 static inline void bond_netpoll_send_skb(const struct slave *slave,
483 struct sk_buff *skb)
484 {
485 struct netpoll *np = slave->np;
486
487 if (np)
488 netpoll_send_skb(np, skb);
489 }
490 #else
491 static inline void bond_netpoll_send_skb(const struct slave *slave,
492 struct sk_buff *skb)
493 {
494 }
495 #endif
496
497 static inline void bond_set_slave_inactive_flags(struct slave *slave,
498 bool notify)
499 {
500 if (!bond_is_lb(slave->bond))
501 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
502 if (!slave->bond->params.all_slaves_active)
503 slave->inactive = 1;
504 }
505
506 static inline void bond_set_slave_active_flags(struct slave *slave,
507 bool notify)
508 {
509 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
510 slave->inactive = 0;
511 }
512
513 static inline bool bond_is_slave_inactive(struct slave *slave)
514 {
515 return slave->inactive;
516 }
517
518 static inline void bond_propose_link_state(struct slave *slave, int state)
519 {
520 slave->link_new_state = state;
521 }
522
523 static inline void bond_commit_link_state(struct slave *slave, bool notify)
524 {
525 if (slave->link == slave->link_new_state)
526 return;
527
528 slave->link = slave->link_new_state;
529 if (notify) {
530 bond_queue_slave_event(slave);
531 bond_lower_state_changed(slave);
532 slave->should_notify_link = 0;
533 } else {
534 if (slave->should_notify_link)
535 slave->should_notify_link = 0;
536 else
537 slave->should_notify_link = 1;
538 }
539 }
540
541 static inline void bond_set_slave_link_state(struct slave *slave, int state,
542 bool notify)
543 {
544 bond_propose_link_state(slave, state);
545 bond_commit_link_state(slave, notify);
546 }
547
548 static inline void bond_slave_link_notify(struct bonding *bond)
549 {
550 struct list_head *iter;
551 struct slave *tmp;
552
553 bond_for_each_slave(bond, tmp, iter) {
554 if (tmp->should_notify_link) {
555 bond_queue_slave_event(tmp);
556 bond_lower_state_changed(tmp);
557 tmp->should_notify_link = 0;
558 }
559 }
560 }
561
562 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
563 {
564 struct in_device *in_dev;
565 __be32 addr = 0;
566
567 rcu_read_lock();
568 in_dev = __in_dev_get_rcu(dev);
569
570 if (in_dev)
571 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
572 RT_SCOPE_HOST);
573 rcu_read_unlock();
574 return addr;
575 }
576
577 struct bond_net {
578 struct net *net; /* Associated network namespace */
579 struct list_head dev_list;
580 #ifdef CONFIG_PROC_FS
581 struct proc_dir_entry *proc_dir;
582 #endif
583 struct class_attribute class_attr_bonding_masters;
584 };
585
586 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
587 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
588 int bond_create(struct net *net, const char *name);
589 int bond_create_sysfs(struct bond_net *net);
590 void bond_destroy_sysfs(struct bond_net *net);
591 void bond_prepare_sysfs_group(struct bonding *bond);
592 int bond_sysfs_slave_add(struct slave *slave);
593 void bond_sysfs_slave_del(struct slave *slave);
594 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
595 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
596 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
597 int bond_set_carrier(struct bonding *bond);
598 void bond_select_active_slave(struct bonding *bond);
599 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
600 void bond_create_debugfs(void);
601 void bond_destroy_debugfs(void);
602 void bond_debug_register(struct bonding *bond);
603 void bond_debug_unregister(struct bonding *bond);
604 void bond_debug_reregister(struct bonding *bond);
605 const char *bond_mode_name(int mode);
606 void bond_setup(struct net_device *bond_dev);
607 unsigned int bond_get_num_tx_queues(void);
608 int bond_netlink_init(void);
609 void bond_netlink_fini(void);
610 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
611 const char *bond_slave_link_status(s8 link);
612 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
613 struct net_device *end_dev,
614 int level);
615 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
616 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
617
618 #ifdef CONFIG_PROC_FS
619 void bond_create_proc_entry(struct bonding *bond);
620 void bond_remove_proc_entry(struct bonding *bond);
621 void bond_create_proc_dir(struct bond_net *bn);
622 void bond_destroy_proc_dir(struct bond_net *bn);
623 #else
624 static inline void bond_create_proc_entry(struct bonding *bond)
625 {
626 }
627
628 static inline void bond_remove_proc_entry(struct bonding *bond)
629 {
630 }
631
632 static inline void bond_create_proc_dir(struct bond_net *bn)
633 {
634 }
635
636 static inline void bond_destroy_proc_dir(struct bond_net *bn)
637 {
638 }
639 #endif
640
641 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
642 const u8 *mac)
643 {
644 struct list_head *iter;
645 struct slave *tmp;
646
647 bond_for_each_slave(bond, tmp, iter)
648 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
649 return tmp;
650
651 return NULL;
652 }
653
654 /* Caller must hold rcu_read_lock() for read */
655 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
656 const u8 *mac)
657 {
658 struct list_head *iter;
659 struct slave *tmp;
660
661 bond_for_each_slave_rcu(bond, tmp, iter)
662 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
663 return tmp;
664
665 return NULL;
666 }
667
668 /* Caller must hold rcu_read_lock() for read */
669 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
670 {
671 struct list_head *iter;
672 struct slave *tmp;
673 struct netdev_hw_addr *ha;
674
675 bond_for_each_slave_rcu(bond, tmp, iter)
676 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
677 return true;
678
679 if (netdev_uc_empty(bond->dev))
680 return false;
681
682 netdev_for_each_uc_addr(ha, bond->dev)
683 if (ether_addr_equal_64bits(mac, ha->addr))
684 return true;
685
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 */
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 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
719 {
720 atomic_long_inc(&dev->tx_dropped);
721 dev_kfree_skb_any(skb);
722 }
723
724 #endif /* _NET_BONDING_H */