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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 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
90extern atomic_t netpoll_block_tx;
91
92static inline void block_netpoll_tx(void)
93{
94 atomic_inc(&netpoll_block_tx);
95}
96
97static inline void unblock_netpoll_tx(void)
98{
99 atomic_dec(&netpoll_block_tx);
100}
101
102static 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
114struct 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
147struct bond_parm_tbl {
148 char *modename;
149 int mode;
150};
151
152struct 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
183struct 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 */
198struct 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
249void bond_queue_slave_event(struct slave *slave);
250void bond_lower_state_changed(struct slave *slave);
251
252struct 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 */
262static 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
268static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
269{
270 return slave->bond;
271}
272
273static 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
279static 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
285static 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
290static 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
295static 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
303static 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
310static 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
316static 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
322static inline bool bond_uses_primary(struct bonding *bond)
323{
324 return bond_mode_uses_primary(BOND_MODE(bond));
325}
326
327static 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
334static inline bool bond_slave_is_up(struct slave *slave)
335{
336 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
337}
338
339static 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
348static 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
357static 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
376static 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
389static 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
402static inline int bond_slave_state(struct slave *slave)
403{
404 return slave->backup;
405}
406
407static inline bool bond_is_active_slave(struct slave *slave)
408{
409 return !bond_slave_state(slave);
410}
411
412static 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
418static 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
431static 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
466static 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
472static inline int slave_do_arp_validate_only(struct bonding *bond)
473{
474 return bond->params.arp_validate & BOND_ARP_FILTER;
475}
476
477static 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 */
485static 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
498static 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
508static 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
517static inline void bond_netpoll_send_skb(const struct slave *slave,
518 struct sk_buff *skb)
519{
520}
521#endif
522
523static 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
532static 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
539static inline bool bond_is_slave_inactive(struct slave *slave)
540{
541 return slave->inactive;
542}
543
544static inline void bond_propose_link_state(struct slave *slave, int state)
545{
546 slave->link_new_state = state;
547}
548
549static 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
567static 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
574static 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
588static 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
603struct 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
612int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
613void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
614int bond_create(struct net *net, const char *name);
615int bond_create_sysfs(struct bond_net *net);
616void bond_destroy_sysfs(struct bond_net *net);
617void bond_prepare_sysfs_group(struct bonding *bond);
618int bond_sysfs_slave_add(struct slave *slave);
619void bond_sysfs_slave_del(struct slave *slave);
620int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
621 struct netlink_ext_ack *extack);
622int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
623u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
624int bond_set_carrier(struct bonding *bond);
625void bond_select_active_slave(struct bonding *bond);
626void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
627void bond_create_debugfs(void);
628void bond_destroy_debugfs(void);
629void bond_debug_register(struct bonding *bond);
630void bond_debug_unregister(struct bonding *bond);
631void bond_debug_reregister(struct bonding *bond);
632const char *bond_mode_name(int mode);
633void bond_setup(struct net_device *bond_dev);
634unsigned int bond_get_num_tx_queues(void);
635int bond_netlink_init(void);
636void bond_netlink_fini(void);
637struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
638const char *bond_slave_link_status(s8 link);
639struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
640 struct net_device *end_dev,
641 int level);
642int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
643void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
644void bond_work_init_all(struct bonding *bond);
645
646#ifdef CONFIG_PROC_FS
647void bond_create_proc_entry(struct bonding *bond);
648void bond_remove_proc_entry(struct bonding *bond);
649void bond_create_proc_dir(struct bond_net *bn);
650void bond_destroy_proc_dir(struct bond_net *bn);
651#else
652static inline void bond_create_proc_entry(struct bonding *bond)
653{
654}
655
656static inline void bond_remove_proc_entry(struct bonding *bond)
657{
658}
659
660static inline void bond_create_proc_dir(struct bond_net *bn)
661{
662}
663
664static inline void bond_destroy_proc_dir(struct bond_net *bn)
665{
666}
667#endif
668
669static 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 */
683static 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 */
697static 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 */
720static 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 */
734extern unsigned int bond_net_id;
735extern const struct bond_parm_tbl bond_lacp_tbl[];
736extern const struct bond_parm_tbl xmit_hashtype_tbl[];
737extern const struct bond_parm_tbl arp_validate_tbl[];
738extern const struct bond_parm_tbl arp_all_targets_tbl[];
739extern const struct bond_parm_tbl fail_over_mac_tbl[];
740extern const struct bond_parm_tbl pri_reselect_tbl[];
741extern struct bond_parm_tbl ad_select_tbl[];
742
743/* exported from bond_netlink.c */
744extern struct rtnl_link_ops bond_link_ops;
745
746static 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 */
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_XFRM_OFFLOAD
90#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
91 NETIF_F_GSO_ESP)
92#endif /* CONFIG_XFRM_OFFLOAD */
93
94#ifdef CONFIG_NET_POLL_CONTROLLER
95extern atomic_t netpoll_block_tx;
96
97static inline void block_netpoll_tx(void)
98{
99 atomic_inc(&netpoll_block_tx);
100}
101
102static inline void unblock_netpoll_tx(void)
103{
104 atomic_dec(&netpoll_block_tx);
105}
106
107static inline int is_netpoll_tx_blocked(struct net_device *dev)
108{
109 if (unlikely(netpoll_tx_running(dev)))
110 return atomic_read(&netpoll_block_tx);
111 return 0;
112}
113#else
114#define block_netpoll_tx()
115#define unblock_netpoll_tx()
116#define is_netpoll_tx_blocked(dev) (0)
117#endif
118
119struct bond_params {
120 int mode;
121 int xmit_policy;
122 int miimon;
123 u8 num_peer_notif;
124 int arp_interval;
125 int arp_validate;
126 int arp_all_targets;
127 int use_carrier;
128 int fail_over_mac;
129 int updelay;
130 int downdelay;
131 int peer_notif_delay;
132 int lacp_fast;
133 unsigned int min_links;
134 int ad_select;
135 char primary[IFNAMSIZ];
136 int primary_reselect;
137 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
138 int tx_queues;
139 int all_slaves_active;
140 int resend_igmp;
141 int lp_interval;
142 int packets_per_slave;
143 int tlb_dynamic_lb;
144 struct reciprocal_value reciprocal_packets_per_slave;
145 u16 ad_actor_sys_prio;
146 u16 ad_user_port_key;
147
148 /* 2 bytes of padding : see ether_addr_equal_64bits() */
149 u8 ad_actor_system[ETH_ALEN + 2];
150};
151
152struct bond_parm_tbl {
153 char *modename;
154 int mode;
155};
156
157struct slave {
158 struct net_device *dev; /* first - useful for panic debug */
159 struct bonding *bond; /* our master */
160 int delay;
161 /* all three in jiffies */
162 unsigned long last_link_up;
163 unsigned long last_rx;
164 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
165 s8 link; /* one of BOND_LINK_XXXX */
166 s8 link_new_state; /* one of BOND_LINK_XXXX */
167 u8 backup:1, /* indicates backup slave. Value corresponds with
168 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
169 inactive:1, /* indicates inactive slave */
170 should_notify:1, /* indicates whether the state changed */
171 should_notify_link:1; /* indicates whether the link changed */
172 u8 duplex;
173 u32 original_mtu;
174 u32 link_failure_count;
175 u32 speed;
176 u16 queue_id;
177 u8 perm_hwaddr[MAX_ADDR_LEN];
178 struct ad_slave_info *ad_info;
179 struct tlb_slave_info tlb_info;
180#ifdef CONFIG_NET_POLL_CONTROLLER
181 struct netpoll *np;
182#endif
183 struct delayed_work notify_work;
184 struct kobject kobj;
185 struct rtnl_link_stats64 slave_stats;
186};
187
188struct bond_up_slave {
189 unsigned int count;
190 struct rcu_head rcu;
191 struct slave *arr[];
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 */
203struct 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 *usable_slaves;
209 struct bond_up_slave __rcu *all_slaves;
210 bool force_primary;
211 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
212 int (*recv_probe)(const struct sk_buff *, struct bonding *,
213 struct slave *);
214 /* mode_lock is used for mode-specific locking needs, currently used by:
215 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
216 * bond_3ad_state_machine_handler() concurrently and also
217 * the access to the state machine shared variables.
218 * TLB mode (5) - to sync the use and modifications of its hash table
219 * ALB mode (6) - to sync the use and modifications of its hash table
220 */
221 spinlock_t mode_lock;
222 spinlock_t stats_lock;
223 u8 send_peer_notif;
224 u8 igmp_retrans;
225#ifdef CONFIG_PROC_FS
226 struct proc_dir_entry *proc_entry;
227 char proc_file_name[IFNAMSIZ];
228#endif /* CONFIG_PROC_FS */
229 struct list_head bond_list;
230 u32 rr_tx_counter;
231 struct ad_bond_info ad_info;
232 struct alb_bond_info alb_info;
233 struct bond_params params;
234 struct workqueue_struct *wq;
235 struct delayed_work mii_work;
236 struct delayed_work arp_work;
237 struct delayed_work alb_work;
238 struct delayed_work ad_work;
239 struct delayed_work mcast_work;
240 struct delayed_work slave_arr_work;
241#ifdef CONFIG_DEBUG_FS
242 /* debugging support via debugfs */
243 struct dentry *debug_dir;
244#endif /* CONFIG_DEBUG_FS */
245 struct rtnl_link_stats64 bond_stats;
246#ifdef CONFIG_XFRM_OFFLOAD
247 struct xfrm_state *xs;
248#endif /* CONFIG_XFRM_OFFLOAD */
249};
250
251#define bond_slave_get_rcu(dev) \
252 ((struct slave *) rcu_dereference(dev->rx_handler_data))
253
254#define bond_slave_get_rtnl(dev) \
255 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
256
257void bond_queue_slave_event(struct slave *slave);
258void bond_lower_state_changed(struct slave *slave);
259
260struct bond_vlan_tag {
261 __be16 vlan_proto;
262 unsigned short vlan_id;
263};
264
265/**
266 * Returns NULL if the net_device does not belong to any of the bond's slaves
267 *
268 * Caller must hold bond lock for read
269 */
270static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
271 struct net_device *slave_dev)
272{
273 return netdev_lower_dev_get_private(bond->dev, slave_dev);
274}
275
276static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
277{
278 return slave->bond;
279}
280
281static inline bool bond_should_override_tx_queue(struct bonding *bond)
282{
283 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
284 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
285}
286
287static inline bool bond_is_lb(const struct bonding *bond)
288{
289 return BOND_MODE(bond) == BOND_MODE_TLB ||
290 BOND_MODE(bond) == BOND_MODE_ALB;
291}
292
293static inline bool bond_needs_speed_duplex(const struct bonding *bond)
294{
295 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
296}
297
298static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
299{
300 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
301}
302
303static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
304{
305 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
306 BOND_MODE(bond) == BOND_MODE_XOR ||
307 BOND_MODE(bond) == BOND_MODE_TLB ||
308 BOND_MODE(bond) == BOND_MODE_ALB);
309}
310
311static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
312{
313 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
314 BOND_MODE(bond) == BOND_MODE_XOR ||
315 bond_is_nondyn_tlb(bond));
316}
317
318static inline bool bond_mode_uses_arp(int mode)
319{
320 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
321 mode != BOND_MODE_ALB;
322}
323
324static inline bool bond_mode_uses_primary(int mode)
325{
326 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
327 mode == BOND_MODE_ALB;
328}
329
330static inline bool bond_uses_primary(struct bonding *bond)
331{
332 return bond_mode_uses_primary(BOND_MODE(bond));
333}
334
335static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
336{
337 struct slave *slave = rcu_dereference(bond->curr_active_slave);
338
339 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
340}
341
342static inline bool bond_slave_is_up(struct slave *slave)
343{
344 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
345}
346
347static inline void bond_set_active_slave(struct slave *slave)
348{
349 if (slave->backup) {
350 slave->backup = 0;
351 bond_queue_slave_event(slave);
352 bond_lower_state_changed(slave);
353 }
354}
355
356static inline void bond_set_backup_slave(struct slave *slave)
357{
358 if (!slave->backup) {
359 slave->backup = 1;
360 bond_queue_slave_event(slave);
361 bond_lower_state_changed(slave);
362 }
363}
364
365static inline void bond_set_slave_state(struct slave *slave,
366 int slave_state, bool notify)
367{
368 if (slave->backup == slave_state)
369 return;
370
371 slave->backup = slave_state;
372 if (notify) {
373 bond_lower_state_changed(slave);
374 bond_queue_slave_event(slave);
375 slave->should_notify = 0;
376 } else {
377 if (slave->should_notify)
378 slave->should_notify = 0;
379 else
380 slave->should_notify = 1;
381 }
382}
383
384static inline void bond_slave_state_change(struct bonding *bond)
385{
386 struct list_head *iter;
387 struct slave *tmp;
388
389 bond_for_each_slave(bond, tmp, iter) {
390 if (tmp->link == BOND_LINK_UP)
391 bond_set_active_slave(tmp);
392 else if (tmp->link == BOND_LINK_DOWN)
393 bond_set_backup_slave(tmp);
394 }
395}
396
397static inline void bond_slave_state_notify(struct bonding *bond)
398{
399 struct list_head *iter;
400 struct slave *tmp;
401
402 bond_for_each_slave(bond, tmp, iter) {
403 if (tmp->should_notify) {
404 bond_lower_state_changed(tmp);
405 tmp->should_notify = 0;
406 }
407 }
408}
409
410static inline int bond_slave_state(struct slave *slave)
411{
412 return slave->backup;
413}
414
415static inline bool bond_is_active_slave(struct slave *slave)
416{
417 return !bond_slave_state(slave);
418}
419
420static inline bool bond_slave_can_tx(struct slave *slave)
421{
422 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
423 bond_is_active_slave(slave);
424}
425
426static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
427{
428 struct slave *slave;
429 bool active;
430
431 rcu_read_lock();
432 slave = bond_slave_get_rcu(slave_dev);
433 active = bond_is_active_slave(slave);
434 rcu_read_unlock();
435
436 return active;
437}
438
439static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
440{
441 if (len == ETH_ALEN) {
442 ether_addr_copy(dst, src);
443 return;
444 }
445
446 memcpy(dst, src, len);
447}
448
449#define BOND_PRI_RESELECT_ALWAYS 0
450#define BOND_PRI_RESELECT_BETTER 1
451#define BOND_PRI_RESELECT_FAILURE 2
452
453#define BOND_FOM_NONE 0
454#define BOND_FOM_ACTIVE 1
455#define BOND_FOM_FOLLOW 2
456
457#define BOND_ARP_TARGETS_ANY 0
458#define BOND_ARP_TARGETS_ALL 1
459
460#define BOND_ARP_VALIDATE_NONE 0
461#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
462#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
463#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
464 BOND_ARP_VALIDATE_BACKUP)
465#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
466#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
467 BOND_ARP_FILTER)
468#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
469 BOND_ARP_FILTER)
470
471#define BOND_SLAVE_NOTIFY_NOW true
472#define BOND_SLAVE_NOTIFY_LATER false
473
474static inline int slave_do_arp_validate(struct bonding *bond,
475 struct slave *slave)
476{
477 return bond->params.arp_validate & (1 << bond_slave_state(slave));
478}
479
480static inline int slave_do_arp_validate_only(struct bonding *bond)
481{
482 return bond->params.arp_validate & BOND_ARP_FILTER;
483}
484
485static inline int bond_is_ip_target_ok(__be32 addr)
486{
487 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
488}
489
490/* Get the oldest arp which we've received on this slave for bond's
491 * arp_targets.
492 */
493static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
494 struct slave *slave)
495{
496 int i = 1;
497 unsigned long ret = slave->target_last_arp_rx[0];
498
499 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
500 if (time_before(slave->target_last_arp_rx[i], ret))
501 ret = slave->target_last_arp_rx[i];
502
503 return ret;
504}
505
506static inline unsigned long slave_last_rx(struct bonding *bond,
507 struct slave *slave)
508{
509 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
510 return slave_oldest_target_arp_rx(bond, slave);
511
512 return slave->last_rx;
513}
514
515#ifdef CONFIG_NET_POLL_CONTROLLER
516static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
517 struct sk_buff *skb)
518{
519 return netpoll_send_skb(slave->np, skb);
520}
521#else
522static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
523 struct sk_buff *skb)
524{
525 BUG();
526 return NETDEV_TX_OK;
527}
528#endif
529
530static inline void bond_set_slave_inactive_flags(struct slave *slave,
531 bool notify)
532{
533 if (!bond_is_lb(slave->bond))
534 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
535 if (!slave->bond->params.all_slaves_active)
536 slave->inactive = 1;
537}
538
539static inline void bond_set_slave_active_flags(struct slave *slave,
540 bool notify)
541{
542 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
543 slave->inactive = 0;
544}
545
546static inline bool bond_is_slave_inactive(struct slave *slave)
547{
548 return slave->inactive;
549}
550
551static inline void bond_propose_link_state(struct slave *slave, int state)
552{
553 slave->link_new_state = state;
554}
555
556static inline void bond_commit_link_state(struct slave *slave, bool notify)
557{
558 if (slave->link_new_state == BOND_LINK_NOCHANGE)
559 return;
560
561 slave->link = slave->link_new_state;
562 if (notify) {
563 bond_queue_slave_event(slave);
564 bond_lower_state_changed(slave);
565 slave->should_notify_link = 0;
566 } else {
567 if (slave->should_notify_link)
568 slave->should_notify_link = 0;
569 else
570 slave->should_notify_link = 1;
571 }
572}
573
574static inline void bond_set_slave_link_state(struct slave *slave, int state,
575 bool notify)
576{
577 bond_propose_link_state(slave, state);
578 bond_commit_link_state(slave, notify);
579}
580
581static inline void bond_slave_link_notify(struct bonding *bond)
582{
583 struct list_head *iter;
584 struct slave *tmp;
585
586 bond_for_each_slave(bond, tmp, iter) {
587 if (tmp->should_notify_link) {
588 bond_queue_slave_event(tmp);
589 bond_lower_state_changed(tmp);
590 tmp->should_notify_link = 0;
591 }
592 }
593}
594
595static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
596{
597 struct in_device *in_dev;
598 __be32 addr = 0;
599
600 rcu_read_lock();
601 in_dev = __in_dev_get_rcu(dev);
602
603 if (in_dev)
604 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
605 RT_SCOPE_HOST);
606 rcu_read_unlock();
607 return addr;
608}
609
610struct bond_net {
611 struct net *net; /* Associated network namespace */
612 struct list_head dev_list;
613#ifdef CONFIG_PROC_FS
614 struct proc_dir_entry *proc_dir;
615#endif
616 struct class_attribute class_attr_bonding_masters;
617};
618
619int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
620netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
621int bond_create(struct net *net, const char *name);
622int bond_create_sysfs(struct bond_net *net);
623void bond_destroy_sysfs(struct bond_net *net);
624void bond_prepare_sysfs_group(struct bonding *bond);
625int bond_sysfs_slave_add(struct slave *slave);
626void bond_sysfs_slave_del(struct slave *slave);
627int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
628 struct netlink_ext_ack *extack);
629int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
630u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
631int bond_set_carrier(struct bonding *bond);
632void bond_select_active_slave(struct bonding *bond);
633void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
634void bond_create_debugfs(void);
635void bond_destroy_debugfs(void);
636void bond_debug_register(struct bonding *bond);
637void bond_debug_unregister(struct bonding *bond);
638void bond_debug_reregister(struct bonding *bond);
639const char *bond_mode_name(int mode);
640void bond_setup(struct net_device *bond_dev);
641unsigned int bond_get_num_tx_queues(void);
642int bond_netlink_init(void);
643void bond_netlink_fini(void);
644struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
645const char *bond_slave_link_status(s8 link);
646struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
647 struct net_device *end_dev,
648 int level);
649int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
650void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
651void bond_work_init_all(struct bonding *bond);
652
653#ifdef CONFIG_PROC_FS
654void bond_create_proc_entry(struct bonding *bond);
655void bond_remove_proc_entry(struct bonding *bond);
656void bond_create_proc_dir(struct bond_net *bn);
657void bond_destroy_proc_dir(struct bond_net *bn);
658#else
659static inline void bond_create_proc_entry(struct bonding *bond)
660{
661}
662
663static inline void bond_remove_proc_entry(struct bonding *bond)
664{
665}
666
667static inline void bond_create_proc_dir(struct bond_net *bn)
668{
669}
670
671static inline void bond_destroy_proc_dir(struct bond_net *bn)
672{
673}
674#endif
675
676static inline struct slave *bond_slave_has_mac(struct bonding *bond,
677 const u8 *mac)
678{
679 struct list_head *iter;
680 struct slave *tmp;
681
682 bond_for_each_slave(bond, tmp, iter)
683 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
684 return tmp;
685
686 return NULL;
687}
688
689/* Caller must hold rcu_read_lock() for read */
690static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
691 const u8 *mac)
692{
693 struct list_head *iter;
694 struct slave *tmp;
695
696 bond_for_each_slave_rcu(bond, tmp, iter)
697 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
698 return tmp;
699
700 return NULL;
701}
702
703/* Caller must hold rcu_read_lock() for read */
704static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
705{
706 struct list_head *iter;
707 struct slave *tmp;
708 struct netdev_hw_addr *ha;
709
710 bond_for_each_slave_rcu(bond, tmp, iter)
711 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
712 return true;
713
714 if (netdev_uc_empty(bond->dev))
715 return false;
716
717 netdev_for_each_uc_addr(ha, bond->dev)
718 if (ether_addr_equal_64bits(mac, ha->addr))
719 return true;
720
721 return false;
722}
723
724/* Check if the ip is present in arp ip list, or first free slot if ip == 0
725 * Returns -1 if not found, index if found
726 */
727static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
728{
729 int i;
730
731 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
732 if (targets[i] == ip)
733 return i;
734 else if (targets[i] == 0)
735 break;
736
737 return -1;
738}
739
740/* exported from bond_main.c */
741extern unsigned int bond_net_id;
742extern const struct bond_parm_tbl bond_lacp_tbl[];
743extern const struct bond_parm_tbl xmit_hashtype_tbl[];
744extern const struct bond_parm_tbl arp_validate_tbl[];
745extern const struct bond_parm_tbl arp_all_targets_tbl[];
746extern const struct bond_parm_tbl fail_over_mac_tbl[];
747extern const struct bond_parm_tbl pri_reselect_tbl[];
748extern struct bond_parm_tbl ad_select_tbl[];
749
750/* exported from bond_netlink.c */
751extern struct rtnl_link_ops bond_link_ops;
752
753static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
754{
755 atomic_long_inc(&dev->tx_dropped);
756 dev_kfree_skb_any(skb);
757 return NET_XMIT_DROP;
758}
759
760#endif /* _NET_BONDING_H */