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