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 slave_info(bond_dev, slave_dev, fmt, ...) \
42 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
43 #define slave_warn(bond_dev, slave_dev, fmt, ...) \
44 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
45 #define slave_dbg(bond_dev, slave_dev, fmt, ...) \
46 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
47 #define slave_err(bond_dev, slave_dev, fmt, ...) \
48 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
49
50 #define BOND_MODE(bond) ((bond)->params.mode)
51
52 /* slave list primitives */
53 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
54
55 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
56
57 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
58 #define bond_first_slave(bond) \
59 (bond_has_slaves(bond) ? \
60 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
61 NULL)
62 #define bond_last_slave(bond) \
63 (bond_has_slaves(bond) ? \
64 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
65 NULL)
66
67 /* Caller must have rcu_read_lock */
68 #define bond_first_slave_rcu(bond) \
69 netdev_lower_get_first_private_rcu(bond->dev)
70
71 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
72 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
73
74 /**
75 * bond_for_each_slave - iterate over all slaves
76 * @bond: the bond holding this list
77 * @pos: current slave
78 * @iter: list_head * iterator
79 *
80 * Caller must hold RTNL
81 */
82 #define bond_for_each_slave(bond, pos, iter) \
83 netdev_for_each_lower_private((bond)->dev, pos, iter)
84
85 /* Caller must have rcu_read_lock */
86 #define bond_for_each_slave_rcu(bond, pos, iter) \
87 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
88
89 #ifdef CONFIG_NET_POLL_CONTROLLER
90 extern atomic_t netpoll_block_tx;
91
block_netpoll_tx(void)92 static inline void block_netpoll_tx(void)
93 {
94 atomic_inc(&netpoll_block_tx);
95 }
96
unblock_netpoll_tx(void)97 static inline void unblock_netpoll_tx(void)
98 {
99 atomic_dec(&netpoll_block_tx);
100 }
101
is_netpoll_tx_blocked(struct net_device * dev)102 static inline int is_netpoll_tx_blocked(struct net_device *dev)
103 {
104 if (unlikely(netpoll_tx_running(dev)))
105 return atomic_read(&netpoll_block_tx);
106 return 0;
107 }
108 #else
109 #define block_netpoll_tx()
110 #define unblock_netpoll_tx()
111 #define is_netpoll_tx_blocked(dev) (0)
112 #endif
113
114 struct bond_params {
115 int mode;
116 int xmit_policy;
117 int miimon;
118 u8 num_peer_notif;
119 int arp_interval;
120 int arp_validate;
121 int arp_all_targets;
122 int use_carrier;
123 int fail_over_mac;
124 int updelay;
125 int downdelay;
126 int peer_notif_delay;
127 int lacp_fast;
128 unsigned int min_links;
129 int ad_select;
130 char primary[IFNAMSIZ];
131 int primary_reselect;
132 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
133 int tx_queues;
134 int all_slaves_active;
135 int resend_igmp;
136 int lp_interval;
137 int packets_per_slave;
138 int tlb_dynamic_lb;
139 struct reciprocal_value reciprocal_packets_per_slave;
140 u16 ad_actor_sys_prio;
141 u16 ad_user_port_key;
142
143 /* 2 bytes of padding : see ether_addr_equal_64bits() */
144 u8 ad_actor_system[ETH_ALEN + 2];
145 };
146
147 struct bond_parm_tbl {
148 char *modename;
149 int mode;
150 };
151
152 struct slave {
153 struct net_device *dev; /* first - useful for panic debug */
154 struct bonding *bond; /* our master */
155 int delay;
156 /* all three in jiffies */
157 unsigned long last_link_up;
158 unsigned long last_rx;
159 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
160 s8 link; /* one of BOND_LINK_XXXX */
161 s8 link_new_state; /* one of BOND_LINK_XXXX */
162 u8 backup:1, /* indicates backup slave. Value corresponds with
163 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
164 inactive:1, /* indicates inactive slave */
165 should_notify:1, /* indicates whether the state changed */
166 should_notify_link:1; /* indicates whether the link changed */
167 u8 duplex;
168 u32 original_mtu;
169 u32 link_failure_count;
170 u32 speed;
171 u16 queue_id;
172 u8 perm_hwaddr[MAX_ADDR_LEN];
173 struct ad_slave_info *ad_info;
174 struct tlb_slave_info tlb_info;
175 #ifdef CONFIG_NET_POLL_CONTROLLER
176 struct netpoll *np;
177 #endif
178 struct delayed_work notify_work;
179 struct kobject kobj;
180 struct rtnl_link_stats64 slave_stats;
181 };
182
183 struct bond_up_slave {
184 unsigned int count;
185 struct rcu_head rcu;
186 struct slave *arr[0];
187 };
188
189 /*
190 * Link pseudo-state only used internally by monitors
191 */
192 #define BOND_LINK_NOCHANGE -1
193
194 /*
195 * Here are the locking policies for the two bonding locks:
196 * Get rcu_read_lock when reading or RTNL when writing slave list.
197 */
198 struct bonding {
199 struct net_device *dev; /* first - useful for panic debug */
200 struct slave __rcu *curr_active_slave;
201 struct slave __rcu *current_arp_slave;
202 struct slave __rcu *primary_slave;
203 struct bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
204 bool force_primary;
205 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
206 int (*recv_probe)(const struct sk_buff *, struct bonding *,
207 struct slave *);
208 /* mode_lock is used for mode-specific locking needs, currently used by:
209 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
210 * bond_3ad_state_machine_handler() concurrently and also
211 * the access to the state machine shared variables.
212 * TLB mode (5) - to sync the use and modifications of its hash table
213 * ALB mode (6) - to sync the use and modifications of its hash table
214 */
215 spinlock_t mode_lock;
216 spinlock_t stats_lock;
217 u8 send_peer_notif;
218 u8 igmp_retrans;
219 #ifdef CONFIG_PROC_FS
220 struct proc_dir_entry *proc_entry;
221 char proc_file_name[IFNAMSIZ];
222 #endif /* CONFIG_PROC_FS */
223 struct list_head bond_list;
224 u32 rr_tx_counter;
225 struct ad_bond_info ad_info;
226 struct alb_bond_info alb_info;
227 struct bond_params params;
228 struct workqueue_struct *wq;
229 struct delayed_work mii_work;
230 struct delayed_work arp_work;
231 struct delayed_work alb_work;
232 struct delayed_work ad_work;
233 struct delayed_work mcast_work;
234 struct delayed_work slave_arr_work;
235 #ifdef CONFIG_DEBUG_FS
236 /* debugging support via debugfs */
237 struct dentry *debug_dir;
238 #endif /* CONFIG_DEBUG_FS */
239 struct rtnl_link_stats64 bond_stats;
240 struct lock_class_key stats_lock_key;
241 };
242
243 #define bond_slave_get_rcu(dev) \
244 ((struct slave *) rcu_dereference(dev->rx_handler_data))
245
246 #define bond_slave_get_rtnl(dev) \
247 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
248
249 void bond_queue_slave_event(struct slave *slave);
250 void bond_lower_state_changed(struct slave *slave);
251
252 struct bond_vlan_tag {
253 __be16 vlan_proto;
254 unsigned short vlan_id;
255 };
256
257 /**
258 * Returns NULL if the net_device does not belong to any of the bond's slaves
259 *
260 * Caller must hold bond lock for read
261 */
bond_get_slave_by_dev(struct bonding * bond,struct net_device * slave_dev)262 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
263 struct net_device *slave_dev)
264 {
265 return netdev_lower_dev_get_private(bond->dev, slave_dev);
266 }
267
bond_get_bond_by_slave(struct slave * slave)268 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
269 {
270 return slave->bond;
271 }
272
bond_should_override_tx_queue(struct bonding * bond)273 static inline bool bond_should_override_tx_queue(struct bonding *bond)
274 {
275 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
276 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
277 }
278
bond_is_lb(const struct bonding * bond)279 static inline bool bond_is_lb(const struct bonding *bond)
280 {
281 return BOND_MODE(bond) == BOND_MODE_TLB ||
282 BOND_MODE(bond) == BOND_MODE_ALB;
283 }
284
bond_needs_speed_duplex(const struct bonding * bond)285 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
286 {
287 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
288 }
289
bond_is_nondyn_tlb(const struct bonding * bond)290 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
291 {
292 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
293 }
294
bond_mode_can_use_xmit_hash(const struct bonding * bond)295 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
296 {
297 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
298 BOND_MODE(bond) == BOND_MODE_XOR ||
299 BOND_MODE(bond) == BOND_MODE_TLB ||
300 BOND_MODE(bond) == BOND_MODE_ALB);
301 }
302
bond_mode_uses_xmit_hash(const struct bonding * bond)303 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
304 {
305 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
306 BOND_MODE(bond) == BOND_MODE_XOR ||
307 bond_is_nondyn_tlb(bond));
308 }
309
bond_mode_uses_arp(int mode)310 static inline bool bond_mode_uses_arp(int mode)
311 {
312 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
313 mode != BOND_MODE_ALB;
314 }
315
bond_mode_uses_primary(int mode)316 static inline bool bond_mode_uses_primary(int mode)
317 {
318 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
319 mode == BOND_MODE_ALB;
320 }
321
bond_uses_primary(struct bonding * bond)322 static inline bool bond_uses_primary(struct bonding *bond)
323 {
324 return bond_mode_uses_primary(BOND_MODE(bond));
325 }
326
bond_option_active_slave_get_rcu(struct bonding * bond)327 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
328 {
329 struct slave *slave = rcu_dereference(bond->curr_active_slave);
330
331 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
332 }
333
bond_slave_is_up(struct slave * slave)334 static inline bool bond_slave_is_up(struct slave *slave)
335 {
336 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
337 }
338
bond_set_active_slave(struct slave * slave)339 static inline void bond_set_active_slave(struct slave *slave)
340 {
341 if (slave->backup) {
342 slave->backup = 0;
343 bond_queue_slave_event(slave);
344 bond_lower_state_changed(slave);
345 }
346 }
347
bond_set_backup_slave(struct slave * slave)348 static inline void bond_set_backup_slave(struct slave *slave)
349 {
350 if (!slave->backup) {
351 slave->backup = 1;
352 bond_queue_slave_event(slave);
353 bond_lower_state_changed(slave);
354 }
355 }
356
bond_set_slave_state(struct slave * slave,int slave_state,bool notify)357 static inline void bond_set_slave_state(struct slave *slave,
358 int slave_state, bool notify)
359 {
360 if (slave->backup == slave_state)
361 return;
362
363 slave->backup = slave_state;
364 if (notify) {
365 bond_lower_state_changed(slave);
366 bond_queue_slave_event(slave);
367 slave->should_notify = 0;
368 } else {
369 if (slave->should_notify)
370 slave->should_notify = 0;
371 else
372 slave->should_notify = 1;
373 }
374 }
375
bond_slave_state_change(struct bonding * bond)376 static inline void bond_slave_state_change(struct bonding *bond)
377 {
378 struct list_head *iter;
379 struct slave *tmp;
380
381 bond_for_each_slave(bond, tmp, iter) {
382 if (tmp->link == BOND_LINK_UP)
383 bond_set_active_slave(tmp);
384 else if (tmp->link == BOND_LINK_DOWN)
385 bond_set_backup_slave(tmp);
386 }
387 }
388
bond_slave_state_notify(struct bonding * bond)389 static inline void bond_slave_state_notify(struct bonding *bond)
390 {
391 struct list_head *iter;
392 struct slave *tmp;
393
394 bond_for_each_slave(bond, tmp, iter) {
395 if (tmp->should_notify) {
396 bond_lower_state_changed(tmp);
397 tmp->should_notify = 0;
398 }
399 }
400 }
401
bond_slave_state(struct slave * slave)402 static inline int bond_slave_state(struct slave *slave)
403 {
404 return slave->backup;
405 }
406
bond_is_active_slave(struct slave * slave)407 static inline bool bond_is_active_slave(struct slave *slave)
408 {
409 return !bond_slave_state(slave);
410 }
411
bond_slave_can_tx(struct slave * slave)412 static inline bool bond_slave_can_tx(struct slave *slave)
413 {
414 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
415 bond_is_active_slave(slave);
416 }
417
bond_is_active_slave_dev(const struct net_device * slave_dev)418 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
419 {
420 struct slave *slave;
421 bool active;
422
423 rcu_read_lock();
424 slave = bond_slave_get_rcu(slave_dev);
425 active = bond_is_active_slave(slave);
426 rcu_read_unlock();
427
428 return active;
429 }
430
bond_hw_addr_copy(u8 * dst,const u8 * src,unsigned int len)431 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
432 {
433 if (len == ETH_ALEN) {
434 ether_addr_copy(dst, src);
435 return;
436 }
437
438 memcpy(dst, src, len);
439 }
440
441 #define BOND_PRI_RESELECT_ALWAYS 0
442 #define BOND_PRI_RESELECT_BETTER 1
443 #define BOND_PRI_RESELECT_FAILURE 2
444
445 #define BOND_FOM_NONE 0
446 #define BOND_FOM_ACTIVE 1
447 #define BOND_FOM_FOLLOW 2
448
449 #define BOND_ARP_TARGETS_ANY 0
450 #define BOND_ARP_TARGETS_ALL 1
451
452 #define BOND_ARP_VALIDATE_NONE 0
453 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
454 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
455 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
456 BOND_ARP_VALIDATE_BACKUP)
457 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
458 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
459 BOND_ARP_FILTER)
460 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
461 BOND_ARP_FILTER)
462
463 #define BOND_SLAVE_NOTIFY_NOW true
464 #define BOND_SLAVE_NOTIFY_LATER false
465
slave_do_arp_validate(struct bonding * bond,struct slave * slave)466 static inline int slave_do_arp_validate(struct bonding *bond,
467 struct slave *slave)
468 {
469 return bond->params.arp_validate & (1 << bond_slave_state(slave));
470 }
471
slave_do_arp_validate_only(struct bonding * bond)472 static inline int slave_do_arp_validate_only(struct bonding *bond)
473 {
474 return bond->params.arp_validate & BOND_ARP_FILTER;
475 }
476
bond_is_ip_target_ok(__be32 addr)477 static inline int bond_is_ip_target_ok(__be32 addr)
478 {
479 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
480 }
481
482 /* Get the oldest arp which we've received on this slave for bond's
483 * arp_targets.
484 */
slave_oldest_target_arp_rx(struct bonding * bond,struct slave * slave)485 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
486 struct slave *slave)
487 {
488 int i = 1;
489 unsigned long ret = slave->target_last_arp_rx[0];
490
491 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
492 if (time_before(slave->target_last_arp_rx[i], ret))
493 ret = slave->target_last_arp_rx[i];
494
495 return ret;
496 }
497
slave_last_rx(struct bonding * bond,struct slave * slave)498 static inline unsigned long slave_last_rx(struct bonding *bond,
499 struct slave *slave)
500 {
501 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
502 return slave_oldest_target_arp_rx(bond, slave);
503
504 return slave->last_rx;
505 }
506
507 #ifdef CONFIG_NET_POLL_CONTROLLER
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 struct netpoll *np = slave->np;
512
513 if (np)
514 netpoll_send_skb(np, skb);
515 }
516 #else
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)517 static inline void bond_netpoll_send_skb(const struct slave *slave,
518 struct sk_buff *skb)
519 {
520 }
521 #endif
522
bond_set_slave_inactive_flags(struct slave * slave,bool notify)523 static inline void bond_set_slave_inactive_flags(struct slave *slave,
524 bool notify)
525 {
526 if (!bond_is_lb(slave->bond))
527 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
528 if (!slave->bond->params.all_slaves_active)
529 slave->inactive = 1;
530 }
531
bond_set_slave_active_flags(struct slave * slave,bool notify)532 static inline void bond_set_slave_active_flags(struct slave *slave,
533 bool notify)
534 {
535 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
536 slave->inactive = 0;
537 }
538
bond_is_slave_inactive(struct slave * slave)539 static inline bool bond_is_slave_inactive(struct slave *slave)
540 {
541 return slave->inactive;
542 }
543
bond_propose_link_state(struct slave * slave,int state)544 static inline void bond_propose_link_state(struct slave *slave, int state)
545 {
546 slave->link_new_state = state;
547 }
548
bond_commit_link_state(struct slave * slave,bool notify)549 static inline void bond_commit_link_state(struct slave *slave, bool notify)
550 {
551 if (slave->link_new_state == BOND_LINK_NOCHANGE)
552 return;
553
554 slave->link = slave->link_new_state;
555 if (notify) {
556 bond_queue_slave_event(slave);
557 bond_lower_state_changed(slave);
558 slave->should_notify_link = 0;
559 } else {
560 if (slave->should_notify_link)
561 slave->should_notify_link = 0;
562 else
563 slave->should_notify_link = 1;
564 }
565 }
566
bond_set_slave_link_state(struct slave * slave,int state,bool notify)567 static inline void bond_set_slave_link_state(struct slave *slave, int state,
568 bool notify)
569 {
570 bond_propose_link_state(slave, state);
571 bond_commit_link_state(slave, notify);
572 }
573
bond_slave_link_notify(struct bonding * bond)574 static inline void bond_slave_link_notify(struct bonding *bond)
575 {
576 struct list_head *iter;
577 struct slave *tmp;
578
579 bond_for_each_slave(bond, tmp, iter) {
580 if (tmp->should_notify_link) {
581 bond_queue_slave_event(tmp);
582 bond_lower_state_changed(tmp);
583 tmp->should_notify_link = 0;
584 }
585 }
586 }
587
bond_confirm_addr(struct net_device * dev,__be32 dst,__be32 local)588 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
589 {
590 struct in_device *in_dev;
591 __be32 addr = 0;
592
593 rcu_read_lock();
594 in_dev = __in_dev_get_rcu(dev);
595
596 if (in_dev)
597 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
598 RT_SCOPE_HOST);
599 rcu_read_unlock();
600 return addr;
601 }
602
603 struct bond_net {
604 struct net *net; /* Associated network namespace */
605 struct list_head dev_list;
606 #ifdef CONFIG_PROC_FS
607 struct proc_dir_entry *proc_dir;
608 #endif
609 struct class_attribute class_attr_bonding_masters;
610 };
611
612 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
613 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
614 int bond_create(struct net *net, const char *name);
615 int bond_create_sysfs(struct bond_net *net);
616 void bond_destroy_sysfs(struct bond_net *net);
617 void bond_prepare_sysfs_group(struct bonding *bond);
618 int bond_sysfs_slave_add(struct slave *slave);
619 void bond_sysfs_slave_del(struct slave *slave);
620 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
621 struct netlink_ext_ack *extack);
622 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
623 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
624 int bond_set_carrier(struct bonding *bond);
625 void bond_select_active_slave(struct bonding *bond);
626 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
627 void bond_create_debugfs(void);
628 void bond_destroy_debugfs(void);
629 void bond_debug_register(struct bonding *bond);
630 void bond_debug_unregister(struct bonding *bond);
631 void bond_debug_reregister(struct bonding *bond);
632 const char *bond_mode_name(int mode);
633 void bond_setup(struct net_device *bond_dev);
634 unsigned int bond_get_num_tx_queues(void);
635 int bond_netlink_init(void);
636 void bond_netlink_fini(void);
637 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
638 const char *bond_slave_link_status(s8 link);
639 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
640 struct net_device *end_dev,
641 int level);
642 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
643 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
644 void bond_work_init_all(struct bonding *bond);
645
646 #ifdef CONFIG_PROC_FS
647 void bond_create_proc_entry(struct bonding *bond);
648 void bond_remove_proc_entry(struct bonding *bond);
649 void bond_create_proc_dir(struct bond_net *bn);
650 void bond_destroy_proc_dir(struct bond_net *bn);
651 #else
bond_create_proc_entry(struct bonding * bond)652 static inline void bond_create_proc_entry(struct bonding *bond)
653 {
654 }
655
bond_remove_proc_entry(struct bonding * bond)656 static inline void bond_remove_proc_entry(struct bonding *bond)
657 {
658 }
659
bond_create_proc_dir(struct bond_net * bn)660 static inline void bond_create_proc_dir(struct bond_net *bn)
661 {
662 }
663
bond_destroy_proc_dir(struct bond_net * bn)664 static inline void bond_destroy_proc_dir(struct bond_net *bn)
665 {
666 }
667 #endif
668
bond_slave_has_mac(struct bonding * bond,const u8 * mac)669 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
670 const u8 *mac)
671 {
672 struct list_head *iter;
673 struct slave *tmp;
674
675 bond_for_each_slave(bond, tmp, iter)
676 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
677 return tmp;
678
679 return NULL;
680 }
681
682 /* Caller must hold rcu_read_lock() for read */
bond_slave_has_mac_rcu(struct bonding * bond,const u8 * mac)683 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
684 const u8 *mac)
685 {
686 struct list_head *iter;
687 struct slave *tmp;
688
689 bond_for_each_slave_rcu(bond, tmp, iter)
690 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
691 return tmp;
692
693 return NULL;
694 }
695
696 /* Caller must hold rcu_read_lock() for read */
bond_slave_has_mac_rx(struct bonding * bond,const u8 * mac)697 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
698 {
699 struct list_head *iter;
700 struct slave *tmp;
701 struct netdev_hw_addr *ha;
702
703 bond_for_each_slave_rcu(bond, tmp, iter)
704 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
705 return true;
706
707 if (netdev_uc_empty(bond->dev))
708 return false;
709
710 netdev_for_each_uc_addr(ha, bond->dev)
711 if (ether_addr_equal_64bits(mac, ha->addr))
712 return true;
713
714 return false;
715 }
716
717 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
718 * Returns -1 if not found, index if found
719 */
bond_get_targets_ip(__be32 * targets,__be32 ip)720 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
721 {
722 int i;
723
724 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
725 if (targets[i] == ip)
726 return i;
727 else if (targets[i] == 0)
728 break;
729
730 return -1;
731 }
732
733 /* exported from bond_main.c */
734 extern unsigned int bond_net_id;
735 extern const struct bond_parm_tbl bond_lacp_tbl[];
736 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
737 extern const struct bond_parm_tbl arp_validate_tbl[];
738 extern const struct bond_parm_tbl arp_all_targets_tbl[];
739 extern const struct bond_parm_tbl fail_over_mac_tbl[];
740 extern const struct bond_parm_tbl pri_reselect_tbl[];
741 extern struct bond_parm_tbl ad_select_tbl[];
742
743 /* exported from bond_netlink.c */
744 extern struct rtnl_link_ops bond_link_ops;
745
bond_tx_drop(struct net_device * dev,struct sk_buff * skb)746 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
747 {
748 atomic_long_inc(&dev->tx_dropped);
749 dev_kfree_skb_any(skb);
750 }
751
752 #endif /* _NET_BONDING_H */
753