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TOMOYO Linux Cross Reference
Linux/include/net/bonding.h

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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 DRV_VERSION     "3.7.1"
 34 #define DRV_RELDATE     "April 27, 2011"
 35 #define DRV_NAME        "bonding"
 36 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
 37 
 38 #define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
 39 
 40 #define BOND_MAX_ARP_TARGETS    16
 41 
 42 #define BOND_DEFAULT_MIIMON     100
 43 
 44 /*
 45  * Less bad way to call ioctl from within the kernel; this needs to be
 46  * done some other way to get the call out of interrupt context.
 47  * Needs "ioctl" variable to be supplied by calling context.
 48  */
 49 #define IOCTL(dev, arg, cmd) ({         \
 50         int res = 0;                    \
 51         mm_segment_t fs = get_fs();     \
 52         set_fs(get_ds());               \
 53         res = ioctl(dev, arg, cmd);     \
 54         set_fs(fs);                     \
 55         res; })
 56 
 57 #define BOND_MODE(bond) ((bond)->params.mode)
 58 
 59 /* slave list primitives */
 60 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
 61 
 62 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
 63 
 64 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
 65 #define bond_first_slave(bond) \
 66         (bond_has_slaves(bond) ? \
 67                 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
 68                 NULL)
 69 #define bond_last_slave(bond) \
 70         (bond_has_slaves(bond) ? \
 71                 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
 72                 NULL)
 73 
 74 /* Caller must have rcu_read_lock */
 75 #define bond_first_slave_rcu(bond) \
 76         netdev_lower_get_first_private_rcu(bond->dev)
 77 
 78 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
 79 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
 80 
 81 /**
 82  * bond_for_each_slave - iterate over all slaves
 83  * @bond:       the bond holding this list
 84  * @pos:        current slave
 85  * @iter:       list_head * iterator
 86  *
 87  * Caller must hold RTNL
 88  */
 89 #define bond_for_each_slave(bond, pos, iter) \
 90         netdev_for_each_lower_private((bond)->dev, pos, iter)
 91 
 92 /* Caller must have rcu_read_lock */
 93 #define bond_for_each_slave_rcu(bond, pos, iter) \
 94         netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
 95 
 96 #ifdef CONFIG_NET_POLL_CONTROLLER
 97 extern atomic_t netpoll_block_tx;
 98 
 99 static inline void block_netpoll_tx(void)
100 {
101         atomic_inc(&netpoll_block_tx);
102 }
103 
104 static inline void unblock_netpoll_tx(void)
105 {
106         atomic_dec(&netpoll_block_tx);
107 }
108 
109 static inline int is_netpoll_tx_blocked(struct net_device *dev)
110 {
111         if (unlikely(netpoll_tx_running(dev)))
112                 return atomic_read(&netpoll_block_tx);
113         return 0;
114 }
115 #else
116 #define block_netpoll_tx()
117 #define unblock_netpoll_tx()
118 #define is_netpoll_tx_blocked(dev) (0)
119 #endif
120 
121 struct bond_params {
122         int mode;
123         int xmit_policy;
124         int miimon;
125         u8 num_peer_notif;
126         int arp_interval;
127         int arp_validate;
128         int arp_all_targets;
129         int use_carrier;
130         int fail_over_mac;
131         int updelay;
132         int downdelay;
133         int lacp_fast;
134         unsigned int min_links;
135         int ad_select;
136         char primary[IFNAMSIZ];
137         int primary_reselect;
138         __be32 arp_targets[BOND_MAX_ARP_TARGETS];
139         int tx_queues;
140         int all_slaves_active;
141         int resend_igmp;
142         int lp_interval;
143         int packets_per_slave;
144         int tlb_dynamic_lb;
145         struct reciprocal_value reciprocal_packets_per_slave;
146 };
147 
148 struct bond_parm_tbl {
149         char *modename;
150         int mode;
151 };
152 
153 struct netdev_notify_work {
154         struct delayed_work     work;
155         struct net_device       *dev;
156         struct netdev_bonding_info bonding_info;
157 };
158 
159 struct slave {
160         struct net_device *dev; /* first - useful for panic debug */
161         struct bonding *bond; /* our master */
162         int    delay;
163         /* all three in jiffies */
164         unsigned long last_link_up;
165         unsigned long last_rx;
166         unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
167         s8     link;    /* one of BOND_LINK_XXXX */
168         s8     new_link;
169         u8     backup:1,   /* indicates backup slave. Value corresponds with
170                               BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
171                inactive:1, /* indicates inactive slave */
172                should_notify:1; /* indicateds whether the state changed */
173         u8     duplex;
174         u32    original_mtu;
175         u32    link_failure_count;
176         u32    speed;
177         u16    queue_id;
178         u8     perm_hwaddr[ETH_ALEN];
179         struct ad_slave_info *ad_info;
180         struct tlb_slave_info tlb_info;
181 #ifdef CONFIG_NET_POLL_CONTROLLER
182         struct netpoll *np;
183 #endif
184         struct kobject kobj;
185         struct rtnl_link_stats64 slave_stats;
186 };
187 
188 struct bond_up_slave {
189         unsigned int    count;
190         struct rcu_head rcu;
191         struct slave    *arr[0];
192 };
193 
194 /*
195  * Link pseudo-state only used internally by monitors
196  */
197 #define BOND_LINK_NOCHANGE -1
198 
199 /*
200  * Here are the locking policies for the two bonding locks:
201  * Get rcu_read_lock when reading or RTNL when writing slave list.
202  */
203 struct bonding {
204         struct   net_device *dev; /* first - useful for panic debug */
205         struct   slave __rcu *curr_active_slave;
206         struct   slave __rcu *current_arp_slave;
207         struct   slave __rcu *primary_slave;
208         struct   bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
209         bool     force_primary;
210         s32      slave_cnt; /* never change this value outside the attach/detach wrappers */
211         int     (*recv_probe)(const struct sk_buff *, struct bonding *,
212                               struct slave *);
213         /* mode_lock is used for mode-specific locking needs, currently used by:
214          * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
215          *                bond_3ad_state_machine_handler() concurrently and also
216          *                the access to the state machine shared variables.
217          * TLB mode (5) - to sync the use and modifications of its hash table
218          * ALB mode (6) - to sync the use and modifications of its hash table
219          */
220         spinlock_t mode_lock;
221         u8       send_peer_notif;
222         u8       igmp_retrans;
223 #ifdef CONFIG_PROC_FS
224         struct   proc_dir_entry *proc_entry;
225         char     proc_file_name[IFNAMSIZ];
226 #endif /* CONFIG_PROC_FS */
227         struct   list_head bond_list;
228         u32      rr_tx_counter;
229         struct   ad_bond_info ad_info;
230         struct   alb_bond_info alb_info;
231         struct   bond_params params;
232         struct   workqueue_struct *wq;
233         struct   delayed_work mii_work;
234         struct   delayed_work arp_work;
235         struct   delayed_work alb_work;
236         struct   delayed_work ad_work;
237         struct   delayed_work mcast_work;
238         struct   delayed_work slave_arr_work;
239 #ifdef CONFIG_DEBUG_FS
240         /* debugging support via debugfs */
241         struct   dentry *debug_dir;
242 #endif /* CONFIG_DEBUG_FS */
243         struct rtnl_link_stats64 bond_stats;
244 };
245 
246 #define bond_slave_get_rcu(dev) \
247         ((struct slave *) rcu_dereference(dev->rx_handler_data))
248 
249 #define bond_slave_get_rtnl(dev) \
250         ((struct slave *) rtnl_dereference(dev->rx_handler_data))
251 
252 void bond_queue_slave_event(struct slave *slave);
253 
254 struct bond_vlan_tag {
255         __be16          vlan_proto;
256         unsigned short  vlan_id;
257 };
258 
259 /**
260  * Returns NULL if the net_device does not belong to any of the bond's slaves
261  *
262  * Caller must hold bond lock for read
263  */
264 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
265                                                   struct net_device *slave_dev)
266 {
267         return netdev_lower_dev_get_private(bond->dev, slave_dev);
268 }
269 
270 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
271 {
272         return slave->bond;
273 }
274 
275 static inline bool bond_should_override_tx_queue(struct bonding *bond)
276 {
277         return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
278                BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
279 }
280 
281 static inline bool bond_is_lb(const struct bonding *bond)
282 {
283         return BOND_MODE(bond) == BOND_MODE_TLB ||
284                BOND_MODE(bond) == BOND_MODE_ALB;
285 }
286 
287 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
288 {
289         return (BOND_MODE(bond) == BOND_MODE_TLB)  &&
290                (bond->params.tlb_dynamic_lb == 0);
291 }
292 
293 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
294 {
295         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
296                 BOND_MODE(bond) == BOND_MODE_XOR ||
297                 bond_is_nondyn_tlb(bond));
298 }
299 
300 static inline bool bond_mode_uses_arp(int mode)
301 {
302         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
303                mode != BOND_MODE_ALB;
304 }
305 
306 static inline bool bond_mode_uses_primary(int mode)
307 {
308         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
309                mode == BOND_MODE_ALB;
310 }
311 
312 static inline bool bond_uses_primary(struct bonding *bond)
313 {
314         return bond_mode_uses_primary(BOND_MODE(bond));
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                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
328         }
329 }
330 
331 static inline void bond_set_backup_slave(struct slave *slave)
332 {
333         if (!slave->backup) {
334                 slave->backup = 1;
335                 bond_queue_slave_event(slave);
336                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
337         }
338 }
339 
340 static inline void bond_set_slave_state(struct slave *slave,
341                                         int slave_state, bool notify)
342 {
343         if (slave->backup == slave_state)
344                 return;
345 
346         slave->backup = slave_state;
347         if (notify) {
348                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
349                 bond_queue_slave_event(slave);
350                 slave->should_notify = 0;
351         } else {
352                 if (slave->should_notify)
353                         slave->should_notify = 0;
354                 else
355                         slave->should_notify = 1;
356         }
357 }
358 
359 static inline void bond_slave_state_change(struct bonding *bond)
360 {
361         struct list_head *iter;
362         struct slave *tmp;
363 
364         bond_for_each_slave(bond, tmp, iter) {
365                 if (tmp->link == BOND_LINK_UP)
366                         bond_set_active_slave(tmp);
367                 else if (tmp->link == BOND_LINK_DOWN)
368                         bond_set_backup_slave(tmp);
369         }
370 }
371 
372 static inline void bond_slave_state_notify(struct bonding *bond)
373 {
374         struct list_head *iter;
375         struct slave *tmp;
376 
377         bond_for_each_slave(bond, tmp, iter) {
378                 if (tmp->should_notify) {
379                         rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
380                         tmp->should_notify = 0;
381                 }
382         }
383 }
384 
385 static inline int bond_slave_state(struct slave *slave)
386 {
387         return slave->backup;
388 }
389 
390 static inline bool bond_is_active_slave(struct slave *slave)
391 {
392         return !bond_slave_state(slave);
393 }
394 
395 static inline bool bond_slave_can_tx(struct slave *slave)
396 {
397         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
398                bond_is_active_slave(slave);
399 }
400 
401 #define BOND_PRI_RESELECT_ALWAYS        0
402 #define BOND_PRI_RESELECT_BETTER        1
403 #define BOND_PRI_RESELECT_FAILURE       2
404 
405 #define BOND_FOM_NONE                   0
406 #define BOND_FOM_ACTIVE                 1
407 #define BOND_FOM_FOLLOW                 2
408 
409 #define BOND_ARP_TARGETS_ANY            0
410 #define BOND_ARP_TARGETS_ALL            1
411 
412 #define BOND_ARP_VALIDATE_NONE          0
413 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
414 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
415 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
416                                          BOND_ARP_VALIDATE_BACKUP)
417 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
418 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
419                                          BOND_ARP_FILTER)
420 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
421                                          BOND_ARP_FILTER)
422 
423 #define BOND_SLAVE_NOTIFY_NOW           true
424 #define BOND_SLAVE_NOTIFY_LATER         false
425 
426 static inline int slave_do_arp_validate(struct bonding *bond,
427                                         struct slave *slave)
428 {
429         return bond->params.arp_validate & (1 << bond_slave_state(slave));
430 }
431 
432 static inline int slave_do_arp_validate_only(struct bonding *bond)
433 {
434         return bond->params.arp_validate & BOND_ARP_FILTER;
435 }
436 
437 static inline int bond_is_ip_target_ok(__be32 addr)
438 {
439         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
440 }
441 
442 /* Get the oldest arp which we've received on this slave for bond's
443  * arp_targets.
444  */
445 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
446                                                        struct slave *slave)
447 {
448         int i = 1;
449         unsigned long ret = slave->target_last_arp_rx[0];
450 
451         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
452                 if (time_before(slave->target_last_arp_rx[i], ret))
453                         ret = slave->target_last_arp_rx[i];
454 
455         return ret;
456 }
457 
458 static inline unsigned long slave_last_rx(struct bonding *bond,
459                                         struct slave *slave)
460 {
461         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
462                 return slave_oldest_target_arp_rx(bond, slave);
463 
464         return slave->last_rx;
465 }
466 
467 #ifdef CONFIG_NET_POLL_CONTROLLER
468 static inline void bond_netpoll_send_skb(const struct slave *slave,
469                                          struct sk_buff *skb)
470 {
471         struct netpoll *np = slave->np;
472 
473         if (np)
474                 netpoll_send_skb(np, skb);
475 }
476 #else
477 static inline void bond_netpoll_send_skb(const struct slave *slave,
478                                          struct sk_buff *skb)
479 {
480 }
481 #endif
482 
483 static inline void bond_set_slave_inactive_flags(struct slave *slave,
484                                                  bool notify)
485 {
486         if (!bond_is_lb(slave->bond))
487                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
488         if (!slave->bond->params.all_slaves_active)
489                 slave->inactive = 1;
490 }
491 
492 static inline void bond_set_slave_active_flags(struct slave *slave,
493                                                bool notify)
494 {
495         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
496         slave->inactive = 0;
497 }
498 
499 static inline bool bond_is_slave_inactive(struct slave *slave)
500 {
501         return slave->inactive;
502 }
503 
504 static inline void bond_set_slave_link_state(struct slave *slave, int state)
505 {
506         slave->link = state;
507         bond_queue_slave_event(slave);
508 }
509 
510 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
511 {
512         struct in_device *in_dev;
513         __be32 addr = 0;
514 
515         rcu_read_lock();
516         in_dev = __in_dev_get_rcu(dev);
517 
518         if (in_dev)
519                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
520                                          RT_SCOPE_HOST);
521         rcu_read_unlock();
522         return addr;
523 }
524 
525 struct bond_net {
526         struct net              *net;   /* Associated network namespace */
527         struct list_head        dev_list;
528 #ifdef CONFIG_PROC_FS
529         struct proc_dir_entry   *proc_dir;
530 #endif
531         struct class_attribute  class_attr_bonding_masters;
532 };
533 
534 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
535 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
536 int bond_create(struct net *net, const char *name);
537 int bond_create_sysfs(struct bond_net *net);
538 void bond_destroy_sysfs(struct bond_net *net);
539 void bond_prepare_sysfs_group(struct bonding *bond);
540 int bond_sysfs_slave_add(struct slave *slave);
541 void bond_sysfs_slave_del(struct slave *slave);
542 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
543 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
544 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
545 int bond_set_carrier(struct bonding *bond);
546 void bond_select_active_slave(struct bonding *bond);
547 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
548 void bond_create_debugfs(void);
549 void bond_destroy_debugfs(void);
550 void bond_debug_register(struct bonding *bond);
551 void bond_debug_unregister(struct bonding *bond);
552 void bond_debug_reregister(struct bonding *bond);
553 const char *bond_mode_name(int mode);
554 void bond_setup(struct net_device *bond_dev);
555 unsigned int bond_get_num_tx_queues(void);
556 int bond_netlink_init(void);
557 void bond_netlink_fini(void);
558 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
559 const char *bond_slave_link_status(s8 link);
560 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
561                                               struct net_device *end_dev,
562                                               int level);
563 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
564 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
565 
566 #ifdef CONFIG_PROC_FS
567 void bond_create_proc_entry(struct bonding *bond);
568 void bond_remove_proc_entry(struct bonding *bond);
569 void bond_create_proc_dir(struct bond_net *bn);
570 void bond_destroy_proc_dir(struct bond_net *bn);
571 #else
572 static inline void bond_create_proc_entry(struct bonding *bond)
573 {
574 }
575 
576 static inline void bond_remove_proc_entry(struct bonding *bond)
577 {
578 }
579 
580 static inline void bond_create_proc_dir(struct bond_net *bn)
581 {
582 }
583 
584 static inline void bond_destroy_proc_dir(struct bond_net *bn)
585 {
586 }
587 #endif
588 
589 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
590                                                const u8 *mac)
591 {
592         struct list_head *iter;
593         struct slave *tmp;
594 
595         bond_for_each_slave(bond, tmp, iter)
596                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
597                         return tmp;
598 
599         return NULL;
600 }
601 
602 /* Caller must hold rcu_read_lock() for read */
603 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
604                                                const u8 *mac)
605 {
606         struct list_head *iter;
607         struct slave *tmp;
608 
609         bond_for_each_slave_rcu(bond, tmp, iter)
610                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
611                         return tmp;
612 
613         return NULL;
614 }
615 
616 /* Caller must hold rcu_read_lock() for read */
617 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
618 {
619         struct list_head *iter;
620         struct slave *tmp;
621         struct netdev_hw_addr *ha;
622 
623         bond_for_each_slave_rcu(bond, tmp, iter)
624                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
625                         return true;
626 
627         if (netdev_uc_empty(bond->dev))
628                 return false;
629 
630         netdev_for_each_uc_addr(ha, bond->dev)
631                 if (ether_addr_equal_64bits(mac, ha->addr))
632                         return true;
633 
634         return false;
635 }
636 
637 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
638  * Returns -1 if not found, index if found
639  */
640 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
641 {
642         int i;
643 
644         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
645                 if (targets[i] == ip)
646                         return i;
647                 else if (targets[i] == 0)
648                         break;
649 
650         return -1;
651 }
652 
653 /* exported from bond_main.c */
654 extern int bond_net_id;
655 extern const struct bond_parm_tbl bond_lacp_tbl[];
656 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
657 extern const struct bond_parm_tbl arp_validate_tbl[];
658 extern const struct bond_parm_tbl arp_all_targets_tbl[];
659 extern const struct bond_parm_tbl fail_over_mac_tbl[];
660 extern const struct bond_parm_tbl pri_reselect_tbl[];
661 extern struct bond_parm_tbl ad_select_tbl[];
662 
663 /* exported from bond_netlink.c */
664 extern struct rtnl_link_ops bond_link_ops;
665 
666 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
667 {
668         atomic_long_inc(&dev->tx_dropped);
669         dev_kfree_skb_any(skb);
670 }
671 
672 #endif /* _NET_BONDING_H */
673 

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