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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 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_needs_speed_duplex(const struct bonding *bond)
281 {
282         return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
283 }
284 
285 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
286 {
287         return (BOND_MODE(bond) == BOND_MODE_TLB)  &&
288                (bond->params.tlb_dynamic_lb == 0);
289 }
290 
291 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
292 {
293         return (BOND_MODE(bond) == BOND_MODE_8023AD ||
294                 BOND_MODE(bond) == BOND_MODE_XOR ||
295                 bond_is_nondyn_tlb(bond));
296 }
297 
298 static inline bool bond_mode_uses_arp(int mode)
299 {
300         return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
301                mode != BOND_MODE_ALB;
302 }
303 
304 static inline bool bond_mode_uses_primary(int mode)
305 {
306         return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
307                mode == BOND_MODE_ALB;
308 }
309 
310 static inline bool bond_uses_primary(struct bonding *bond)
311 {
312         return bond_mode_uses_primary(BOND_MODE(bond));
313 }
314 
315 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
316 {
317         struct slave *slave = rcu_dereference(bond->curr_active_slave);
318 
319         return bond_uses_primary(bond) && slave ? slave->dev : NULL;
320 }
321 
322 static inline bool bond_slave_is_up(struct slave *slave)
323 {
324         return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
325 }
326 
327 static inline void bond_set_active_slave(struct slave *slave)
328 {
329         if (slave->backup) {
330                 slave->backup = 0;
331                 bond_queue_slave_event(slave);
332                 bond_lower_state_changed(slave);
333                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
334         }
335 }
336 
337 static inline void bond_set_backup_slave(struct slave *slave)
338 {
339         if (!slave->backup) {
340                 slave->backup = 1;
341                 bond_queue_slave_event(slave);
342                 bond_lower_state_changed(slave);
343                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
344         }
345 }
346 
347 static inline void bond_set_slave_state(struct slave *slave,
348                                         int slave_state, bool notify)
349 {
350         if (slave->backup == slave_state)
351                 return;
352 
353         slave->backup = slave_state;
354         if (notify) {
355                 bond_lower_state_changed(slave);
356                 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
357                 bond_queue_slave_event(slave);
358                 slave->should_notify = 0;
359         } else {
360                 if (slave->should_notify)
361                         slave->should_notify = 0;
362                 else
363                         slave->should_notify = 1;
364         }
365 }
366 
367 static inline void bond_slave_state_change(struct bonding *bond)
368 {
369         struct list_head *iter;
370         struct slave *tmp;
371 
372         bond_for_each_slave(bond, tmp, iter) {
373                 if (tmp->link == BOND_LINK_UP)
374                         bond_set_active_slave(tmp);
375                 else if (tmp->link == BOND_LINK_DOWN)
376                         bond_set_backup_slave(tmp);
377         }
378 }
379 
380 static inline void bond_slave_state_notify(struct bonding *bond)
381 {
382         struct list_head *iter;
383         struct slave *tmp;
384 
385         bond_for_each_slave(bond, tmp, iter) {
386                 if (tmp->should_notify) {
387                         bond_lower_state_changed(tmp);
388                         rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
389                         tmp->should_notify = 0;
390                 }
391         }
392 }
393 
394 static inline int bond_slave_state(struct slave *slave)
395 {
396         return slave->backup;
397 }
398 
399 static inline bool bond_is_active_slave(struct slave *slave)
400 {
401         return !bond_slave_state(slave);
402 }
403 
404 static inline bool bond_slave_can_tx(struct slave *slave)
405 {
406         return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
407                bond_is_active_slave(slave);
408 }
409 
410 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
411 {
412         if (len == ETH_ALEN) {
413                 ether_addr_copy(dst, src);
414                 return;
415         }
416 
417         memcpy(dst, src, len);
418 }
419 
420 #define BOND_PRI_RESELECT_ALWAYS        0
421 #define BOND_PRI_RESELECT_BETTER        1
422 #define BOND_PRI_RESELECT_FAILURE       2
423 
424 #define BOND_FOM_NONE                   0
425 #define BOND_FOM_ACTIVE                 1
426 #define BOND_FOM_FOLLOW                 2
427 
428 #define BOND_ARP_TARGETS_ANY            0
429 #define BOND_ARP_TARGETS_ALL            1
430 
431 #define BOND_ARP_VALIDATE_NONE          0
432 #define BOND_ARP_VALIDATE_ACTIVE        (1 << BOND_STATE_ACTIVE)
433 #define BOND_ARP_VALIDATE_BACKUP        (1 << BOND_STATE_BACKUP)
434 #define BOND_ARP_VALIDATE_ALL           (BOND_ARP_VALIDATE_ACTIVE | \
435                                          BOND_ARP_VALIDATE_BACKUP)
436 #define BOND_ARP_FILTER                 (BOND_ARP_VALIDATE_ALL + 1)
437 #define BOND_ARP_FILTER_ACTIVE          (BOND_ARP_VALIDATE_ACTIVE | \
438                                          BOND_ARP_FILTER)
439 #define BOND_ARP_FILTER_BACKUP          (BOND_ARP_VALIDATE_BACKUP | \
440                                          BOND_ARP_FILTER)
441 
442 #define BOND_SLAVE_NOTIFY_NOW           true
443 #define BOND_SLAVE_NOTIFY_LATER         false
444 
445 static inline int slave_do_arp_validate(struct bonding *bond,
446                                         struct slave *slave)
447 {
448         return bond->params.arp_validate & (1 << bond_slave_state(slave));
449 }
450 
451 static inline int slave_do_arp_validate_only(struct bonding *bond)
452 {
453         return bond->params.arp_validate & BOND_ARP_FILTER;
454 }
455 
456 static inline int bond_is_ip_target_ok(__be32 addr)
457 {
458         return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
459 }
460 
461 /* Get the oldest arp which we've received on this slave for bond's
462  * arp_targets.
463  */
464 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
465                                                        struct slave *slave)
466 {
467         int i = 1;
468         unsigned long ret = slave->target_last_arp_rx[0];
469 
470         for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
471                 if (time_before(slave->target_last_arp_rx[i], ret))
472                         ret = slave->target_last_arp_rx[i];
473 
474         return ret;
475 }
476 
477 static inline unsigned long slave_last_rx(struct bonding *bond,
478                                         struct slave *slave)
479 {
480         if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
481                 return slave_oldest_target_arp_rx(bond, slave);
482 
483         return slave->last_rx;
484 }
485 
486 #ifdef CONFIG_NET_POLL_CONTROLLER
487 static inline void bond_netpoll_send_skb(const struct slave *slave,
488                                          struct sk_buff *skb)
489 {
490         struct netpoll *np = slave->np;
491 
492         if (np)
493                 netpoll_send_skb(np, skb);
494 }
495 #else
496 static inline void bond_netpoll_send_skb(const struct slave *slave,
497                                          struct sk_buff *skb)
498 {
499 }
500 #endif
501 
502 static inline void bond_set_slave_inactive_flags(struct slave *slave,
503                                                  bool notify)
504 {
505         if (!bond_is_lb(slave->bond))
506                 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
507         if (!slave->bond->params.all_slaves_active)
508                 slave->inactive = 1;
509 }
510 
511 static inline void bond_set_slave_active_flags(struct slave *slave,
512                                                bool notify)
513 {
514         bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
515         slave->inactive = 0;
516 }
517 
518 static inline bool bond_is_slave_inactive(struct slave *slave)
519 {
520         return slave->inactive;
521 }
522 
523 static inline void bond_propose_link_state(struct slave *slave, int state)
524 {
525         slave->link_new_state = state;
526 }
527 
528 static inline void bond_commit_link_state(struct slave *slave, bool notify)
529 {
530         if (slave->link == slave->link_new_state)
531                 return;
532 
533         slave->link = slave->link_new_state;
534         if (notify) {
535                 bond_queue_slave_event(slave);
536                 bond_lower_state_changed(slave);
537                 slave->should_notify_link = 0;
538         } else {
539                 if (slave->should_notify_link)
540                         slave->should_notify_link = 0;
541                 else
542                         slave->should_notify_link = 1;
543         }
544 }
545 
546 static inline void bond_set_slave_link_state(struct slave *slave, int state,
547                                              bool notify)
548 {
549         bond_propose_link_state(slave, state);
550         bond_commit_link_state(slave, notify);
551 }
552 
553 static inline void bond_slave_link_notify(struct bonding *bond)
554 {
555         struct list_head *iter;
556         struct slave *tmp;
557 
558         bond_for_each_slave(bond, tmp, iter) {
559                 if (tmp->should_notify_link) {
560                         bond_queue_slave_event(tmp);
561                         bond_lower_state_changed(tmp);
562                         tmp->should_notify_link = 0;
563                 }
564         }
565 }
566 
567 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
568 {
569         struct in_device *in_dev;
570         __be32 addr = 0;
571 
572         rcu_read_lock();
573         in_dev = __in_dev_get_rcu(dev);
574 
575         if (in_dev)
576                 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
577                                          RT_SCOPE_HOST);
578         rcu_read_unlock();
579         return addr;
580 }
581 
582 struct bond_net {
583         struct net              *net;   /* Associated network namespace */
584         struct list_head        dev_list;
585 #ifdef CONFIG_PROC_FS
586         struct proc_dir_entry   *proc_dir;
587 #endif
588         struct class_attribute  class_attr_bonding_masters;
589 };
590 
591 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
592 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
593 int bond_create(struct net *net, const char *name);
594 int bond_create_sysfs(struct bond_net *net);
595 void bond_destroy_sysfs(struct bond_net *net);
596 void bond_prepare_sysfs_group(struct bonding *bond);
597 int bond_sysfs_slave_add(struct slave *slave);
598 void bond_sysfs_slave_del(struct slave *slave);
599 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
600 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
601 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
602 int bond_set_carrier(struct bonding *bond);
603 void bond_select_active_slave(struct bonding *bond);
604 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
605 void bond_create_debugfs(void);
606 void bond_destroy_debugfs(void);
607 void bond_debug_register(struct bonding *bond);
608 void bond_debug_unregister(struct bonding *bond);
609 void bond_debug_reregister(struct bonding *bond);
610 const char *bond_mode_name(int mode);
611 void bond_setup(struct net_device *bond_dev);
612 unsigned int bond_get_num_tx_queues(void);
613 int bond_netlink_init(void);
614 void bond_netlink_fini(void);
615 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
616 const char *bond_slave_link_status(s8 link);
617 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
618                                               struct net_device *end_dev,
619                                               int level);
620 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
621 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
622 void bond_work_init_all(struct bonding *bond);
623 
624 #ifdef CONFIG_PROC_FS
625 void bond_create_proc_entry(struct bonding *bond);
626 void bond_remove_proc_entry(struct bonding *bond);
627 void bond_create_proc_dir(struct bond_net *bn);
628 void bond_destroy_proc_dir(struct bond_net *bn);
629 #else
630 static inline void bond_create_proc_entry(struct bonding *bond)
631 {
632 }
633 
634 static inline void bond_remove_proc_entry(struct bonding *bond)
635 {
636 }
637 
638 static inline void bond_create_proc_dir(struct bond_net *bn)
639 {
640 }
641 
642 static inline void bond_destroy_proc_dir(struct bond_net *bn)
643 {
644 }
645 #endif
646 
647 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
648                                                const u8 *mac)
649 {
650         struct list_head *iter;
651         struct slave *tmp;
652 
653         bond_for_each_slave(bond, tmp, iter)
654                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
655                         return tmp;
656 
657         return NULL;
658 }
659 
660 /* Caller must hold rcu_read_lock() for read */
661 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
662                                                const u8 *mac)
663 {
664         struct list_head *iter;
665         struct slave *tmp;
666 
667         bond_for_each_slave_rcu(bond, tmp, iter)
668                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
669                         return tmp;
670 
671         return NULL;
672 }
673 
674 /* Caller must hold rcu_read_lock() for read */
675 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
676 {
677         struct list_head *iter;
678         struct slave *tmp;
679         struct netdev_hw_addr *ha;
680 
681         bond_for_each_slave_rcu(bond, tmp, iter)
682                 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
683                         return true;
684 
685         if (netdev_uc_empty(bond->dev))
686                 return false;
687 
688         netdev_for_each_uc_addr(ha, bond->dev)
689                 if (ether_addr_equal_64bits(mac, ha->addr))
690                         return true;
691 
692         return false;
693 }
694 
695 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
696  * Returns -1 if not found, index if found
697  */
698 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
699 {
700         int i;
701 
702         for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
703                 if (targets[i] == ip)
704                         return i;
705                 else if (targets[i] == 0)
706                         break;
707 
708         return -1;
709 }
710 
711 /* exported from bond_main.c */
712 extern unsigned int bond_net_id;
713 extern const struct bond_parm_tbl bond_lacp_tbl[];
714 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
715 extern const struct bond_parm_tbl arp_validate_tbl[];
716 extern const struct bond_parm_tbl arp_all_targets_tbl[];
717 extern const struct bond_parm_tbl fail_over_mac_tbl[];
718 extern const struct bond_parm_tbl pri_reselect_tbl[];
719 extern struct bond_parm_tbl ad_select_tbl[];
720 
721 /* exported from bond_netlink.c */
722 extern struct rtnl_link_ops bond_link_ops;
723 
724 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
725 {
726         atomic_long_inc(&dev->tx_dropped);
727         dev_kfree_skb_any(skb);
728 }
729 
730 #endif /* _NET_BONDING_H */
731 

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