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1/*
2 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
3 *
4 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
5 * NCM: Network and Communications Management, Inc.
6 *
7 * BUT, I'm the one who modified it for ethernet, so:
8 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
9 *
10 * This software may be used and distributed according to the terms
11 * of the GNU Public License, incorporated herein by reference.
12 *
13 */
14
15#ifndef _NET_BONDING_H
16#define _NET_BONDING_H
17
18#include <linux/timer.h>
19#include <linux/proc_fs.h>
20#include <linux/if_bonding.h>
21#include <linux/cpumask.h>
22#include <linux/in6.h>
23#include <linux/netpoll.h>
24#include <linux/inetdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/reciprocal_div.h>
27#include <linux/if_link.h>
28
29#include <net/bond_3ad.h>
30#include <net/bond_alb.h>
31#include <net/bond_options.h>
32
33#define BOND_MAX_ARP_TARGETS 16
34
35#define BOND_DEFAULT_MIIMON 100
36
37#ifndef __long_aligned
38#define __long_aligned __attribute__((aligned((sizeof(long)))))
39#endif
40
41#define BOND_MODE(bond) ((bond)->params.mode)
42
43/* slave list primitives */
44#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
45
46#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
47
48/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
49#define bond_first_slave(bond) \
50 (bond_has_slaves(bond) ? \
51 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
52 NULL)
53#define bond_last_slave(bond) \
54 (bond_has_slaves(bond) ? \
55 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
56 NULL)
57
58/* Caller must have rcu_read_lock */
59#define bond_first_slave_rcu(bond) \
60 netdev_lower_get_first_private_rcu(bond->dev)
61
62#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
63#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
64
65/**
66 * bond_for_each_slave - iterate over all slaves
67 * @bond: the bond holding this list
68 * @pos: current slave
69 * @iter: list_head * iterator
70 *
71 * Caller must hold RTNL
72 */
73#define bond_for_each_slave(bond, pos, iter) \
74 netdev_for_each_lower_private((bond)->dev, pos, iter)
75
76/* Caller must have rcu_read_lock */
77#define bond_for_each_slave_rcu(bond, pos, iter) \
78 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
79
80#ifdef CONFIG_NET_POLL_CONTROLLER
81extern atomic_t netpoll_block_tx;
82
83static inline void block_netpoll_tx(void)
84{
85 atomic_inc(&netpoll_block_tx);
86}
87
88static inline void unblock_netpoll_tx(void)
89{
90 atomic_dec(&netpoll_block_tx);
91}
92
93static 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
105struct 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
137struct bond_parm_tbl {
138 char *modename;
139 int mode;
140};
141
142struct netdev_notify_work {
143 struct delayed_work work;
144 struct net_device *dev;
145 struct netdev_bonding_info bonding_info;
146};
147
148struct slave {
149 struct net_device *dev; /* first - useful for panic debug */
150 struct bonding *bond; /* our master */
151 int delay;
152 /* all three in jiffies */
153 unsigned long last_link_up;
154 unsigned long last_rx;
155 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
156 s8 link; /* one of BOND_LINK_XXXX */
157 s8 link_new_state; /* one of BOND_LINK_XXXX */
158 s8 new_link;
159 u8 backup:1, /* indicates backup slave. Value corresponds with
160 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
161 inactive:1, /* indicates inactive slave */
162 should_notify:1, /* indicates whether the state changed */
163 should_notify_link:1; /* indicates whether the link changed */
164 u8 duplex;
165 u32 original_mtu;
166 u32 link_failure_count;
167 u32 speed;
168 u16 queue_id;
169 u8 perm_hwaddr[MAX_ADDR_LEN];
170 struct ad_slave_info *ad_info;
171 struct tlb_slave_info tlb_info;
172#ifdef CONFIG_NET_POLL_CONTROLLER
173 struct netpoll *np;
174#endif
175 struct kobject kobj;
176 struct rtnl_link_stats64 slave_stats;
177};
178
179struct bond_up_slave {
180 unsigned int count;
181 struct rcu_head rcu;
182 struct slave *arr[0];
183};
184
185/*
186 * Link pseudo-state only used internally by monitors
187 */
188#define BOND_LINK_NOCHANGE -1
189
190/*
191 * Here are the locking policies for the two bonding locks:
192 * Get rcu_read_lock when reading or RTNL when writing slave list.
193 */
194struct bonding {
195 struct net_device *dev; /* first - useful for panic debug */
196 struct slave __rcu *curr_active_slave;
197 struct slave __rcu *current_arp_slave;
198 struct slave __rcu *primary_slave;
199 struct bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
200 bool force_primary;
201 u32 nest_level;
202 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
203 int (*recv_probe)(const struct sk_buff *, struct bonding *,
204 struct slave *);
205 /* mode_lock is used for mode-specific locking needs, currently used by:
206 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
207 * bond_3ad_state_machine_handler() concurrently and also
208 * the access to the state machine shared variables.
209 * TLB mode (5) - to sync the use and modifications of its hash table
210 * ALB mode (6) - to sync the use and modifications of its hash table
211 */
212 spinlock_t mode_lock;
213 spinlock_t stats_lock;
214 u8 send_peer_notif;
215 u8 igmp_retrans;
216#ifdef CONFIG_PROC_FS
217 struct proc_dir_entry *proc_entry;
218 char proc_file_name[IFNAMSIZ];
219#endif /* CONFIG_PROC_FS */
220 struct list_head bond_list;
221 u32 rr_tx_counter;
222 struct ad_bond_info ad_info;
223 struct alb_bond_info alb_info;
224 struct bond_params params;
225 struct workqueue_struct *wq;
226 struct delayed_work mii_work;
227 struct delayed_work arp_work;
228 struct delayed_work alb_work;
229 struct delayed_work ad_work;
230 struct delayed_work mcast_work;
231 struct delayed_work slave_arr_work;
232#ifdef CONFIG_DEBUG_FS
233 /* debugging support via debugfs */
234 struct dentry *debug_dir;
235#endif /* CONFIG_DEBUG_FS */
236 struct rtnl_link_stats64 bond_stats;
237};
238
239#define bond_slave_get_rcu(dev) \
240 ((struct slave *) rcu_dereference(dev->rx_handler_data))
241
242#define bond_slave_get_rtnl(dev) \
243 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
244
245void bond_queue_slave_event(struct slave *slave);
246void bond_lower_state_changed(struct slave *slave);
247
248struct bond_vlan_tag {
249 __be16 vlan_proto;
250 unsigned short vlan_id;
251};
252
253/**
254 * Returns NULL if the net_device does not belong to any of the bond's slaves
255 *
256 * Caller must hold bond lock for read
257 */
258static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
259 struct net_device *slave_dev)
260{
261 return netdev_lower_dev_get_private(bond->dev, slave_dev);
262}
263
264static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
265{
266 return slave->bond;
267}
268
269static inline bool bond_should_override_tx_queue(struct bonding *bond)
270{
271 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
272 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
273}
274
275static inline bool bond_is_lb(const struct bonding *bond)
276{
277 return BOND_MODE(bond) == BOND_MODE_TLB ||
278 BOND_MODE(bond) == BOND_MODE_ALB;
279}
280
281static inline bool bond_needs_speed_duplex(const struct bonding *bond)
282{
283 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
284}
285
286static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
287{
288 return (BOND_MODE(bond) == BOND_MODE_TLB) &&
289 (bond->params.tlb_dynamic_lb == 0);
290}
291
292static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
293{
294 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
295 BOND_MODE(bond) == BOND_MODE_XOR ||
296 bond_is_nondyn_tlb(bond));
297}
298
299static inline bool bond_mode_uses_arp(int mode)
300{
301 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
302 mode != BOND_MODE_ALB;
303}
304
305static inline bool bond_mode_uses_primary(int mode)
306{
307 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
308 mode == BOND_MODE_ALB;
309}
310
311static inline bool bond_uses_primary(struct bonding *bond)
312{
313 return bond_mode_uses_primary(BOND_MODE(bond));
314}
315
316static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
317{
318 struct slave *slave = rcu_dereference(bond->curr_active_slave);
319
320 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
321}
322
323static inline bool bond_slave_is_up(struct slave *slave)
324{
325 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
326}
327
328static inline void bond_set_active_slave(struct slave *slave)
329{
330 if (slave->backup) {
331 slave->backup = 0;
332 bond_queue_slave_event(slave);
333 bond_lower_state_changed(slave);
334 }
335}
336
337static inline void bond_set_backup_slave(struct slave *slave)
338{
339 if (!slave->backup) {
340 slave->backup = 1;
341 bond_queue_slave_event(slave);
342 bond_lower_state_changed(slave);
343 }
344}
345
346static inline void bond_set_slave_state(struct slave *slave,
347 int slave_state, bool notify)
348{
349 if (slave->backup == slave_state)
350 return;
351
352 slave->backup = slave_state;
353 if (notify) {
354 bond_lower_state_changed(slave);
355 bond_queue_slave_event(slave);
356 slave->should_notify = 0;
357 } else {
358 if (slave->should_notify)
359 slave->should_notify = 0;
360 else
361 slave->should_notify = 1;
362 }
363}
364
365static inline void bond_slave_state_change(struct bonding *bond)
366{
367 struct list_head *iter;
368 struct slave *tmp;
369
370 bond_for_each_slave(bond, tmp, iter) {
371 if (tmp->link == BOND_LINK_UP)
372 bond_set_active_slave(tmp);
373 else if (tmp->link == BOND_LINK_DOWN)
374 bond_set_backup_slave(tmp);
375 }
376}
377
378static inline void bond_slave_state_notify(struct bonding *bond)
379{
380 struct list_head *iter;
381 struct slave *tmp;
382
383 bond_for_each_slave(bond, tmp, iter) {
384 if (tmp->should_notify) {
385 bond_lower_state_changed(tmp);
386 tmp->should_notify = 0;
387 }
388 }
389}
390
391static inline int bond_slave_state(struct slave *slave)
392{
393 return slave->backup;
394}
395
396static inline bool bond_is_active_slave(struct slave *slave)
397{
398 return !bond_slave_state(slave);
399}
400
401static inline bool bond_slave_can_tx(struct slave *slave)
402{
403 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
404 bond_is_active_slave(slave);
405}
406
407static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
408{
409 if (len == ETH_ALEN) {
410 ether_addr_copy(dst, src);
411 return;
412 }
413
414 memcpy(dst, src, len);
415}
416
417#define BOND_PRI_RESELECT_ALWAYS 0
418#define BOND_PRI_RESELECT_BETTER 1
419#define BOND_PRI_RESELECT_FAILURE 2
420
421#define BOND_FOM_NONE 0
422#define BOND_FOM_ACTIVE 1
423#define BOND_FOM_FOLLOW 2
424
425#define BOND_ARP_TARGETS_ANY 0
426#define BOND_ARP_TARGETS_ALL 1
427
428#define BOND_ARP_VALIDATE_NONE 0
429#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
430#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
431#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
432 BOND_ARP_VALIDATE_BACKUP)
433#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
434#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
435 BOND_ARP_FILTER)
436#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
437 BOND_ARP_FILTER)
438
439#define BOND_SLAVE_NOTIFY_NOW true
440#define BOND_SLAVE_NOTIFY_LATER false
441
442static inline int slave_do_arp_validate(struct bonding *bond,
443 struct slave *slave)
444{
445 return bond->params.arp_validate & (1 << bond_slave_state(slave));
446}
447
448static inline int slave_do_arp_validate_only(struct bonding *bond)
449{
450 return bond->params.arp_validate & BOND_ARP_FILTER;
451}
452
453static inline int bond_is_ip_target_ok(__be32 addr)
454{
455 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
456}
457
458/* Get the oldest arp which we've received on this slave for bond's
459 * arp_targets.
460 */
461static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
462 struct slave *slave)
463{
464 int i = 1;
465 unsigned long ret = slave->target_last_arp_rx[0];
466
467 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
468 if (time_before(slave->target_last_arp_rx[i], ret))
469 ret = slave->target_last_arp_rx[i];
470
471 return ret;
472}
473
474static inline unsigned long slave_last_rx(struct bonding *bond,
475 struct slave *slave)
476{
477 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
478 return slave_oldest_target_arp_rx(bond, slave);
479
480 return slave->last_rx;
481}
482
483#ifdef CONFIG_NET_POLL_CONTROLLER
484static inline void bond_netpoll_send_skb(const struct slave *slave,
485 struct sk_buff *skb)
486{
487 struct netpoll *np = slave->np;
488
489 if (np)
490 netpoll_send_skb(np, skb);
491}
492#else
493static inline void bond_netpoll_send_skb(const struct slave *slave,
494 struct sk_buff *skb)
495{
496}
497#endif
498
499static inline void bond_set_slave_inactive_flags(struct slave *slave,
500 bool notify)
501{
502 if (!bond_is_lb(slave->bond))
503 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
504 if (!slave->bond->params.all_slaves_active)
505 slave->inactive = 1;
506}
507
508static inline void bond_set_slave_active_flags(struct slave *slave,
509 bool notify)
510{
511 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
512 slave->inactive = 0;
513}
514
515static inline bool bond_is_slave_inactive(struct slave *slave)
516{
517 return slave->inactive;
518}
519
520static inline void bond_propose_link_state(struct slave *slave, int state)
521{
522 slave->link_new_state = state;
523}
524
525static inline void bond_commit_link_state(struct slave *slave, bool notify)
526{
527 if (slave->link == slave->link_new_state)
528 return;
529
530 slave->link = slave->link_new_state;
531 if (notify) {
532 bond_queue_slave_event(slave);
533 bond_lower_state_changed(slave);
534 slave->should_notify_link = 0;
535 } else {
536 if (slave->should_notify_link)
537 slave->should_notify_link = 0;
538 else
539 slave->should_notify_link = 1;
540 }
541}
542
543static inline void bond_set_slave_link_state(struct slave *slave, int state,
544 bool notify)
545{
546 bond_propose_link_state(slave, state);
547 bond_commit_link_state(slave, notify);
548}
549
550static inline void bond_slave_link_notify(struct bonding *bond)
551{
552 struct list_head *iter;
553 struct slave *tmp;
554
555 bond_for_each_slave(bond, tmp, iter) {
556 if (tmp->should_notify_link) {
557 bond_queue_slave_event(tmp);
558 bond_lower_state_changed(tmp);
559 tmp->should_notify_link = 0;
560 }
561 }
562}
563
564static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
565{
566 struct in_device *in_dev;
567 __be32 addr = 0;
568
569 rcu_read_lock();
570 in_dev = __in_dev_get_rcu(dev);
571
572 if (in_dev)
573 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
574 RT_SCOPE_HOST);
575 rcu_read_unlock();
576 return addr;
577}
578
579struct bond_net {
580 struct net *net; /* Associated network namespace */
581 struct list_head dev_list;
582#ifdef CONFIG_PROC_FS
583 struct proc_dir_entry *proc_dir;
584#endif
585 struct class_attribute class_attr_bonding_masters;
586};
587
588int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
589void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
590int bond_create(struct net *net, const char *name);
591int bond_create_sysfs(struct bond_net *net);
592void bond_destroy_sysfs(struct bond_net *net);
593void bond_prepare_sysfs_group(struct bonding *bond);
594int bond_sysfs_slave_add(struct slave *slave);
595void bond_sysfs_slave_del(struct slave *slave);
596int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
597 struct netlink_ext_ack *extack);
598int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
599u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
600int bond_set_carrier(struct bonding *bond);
601void bond_select_active_slave(struct bonding *bond);
602void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
603void bond_create_debugfs(void);
604void bond_destroy_debugfs(void);
605void bond_debug_register(struct bonding *bond);
606void bond_debug_unregister(struct bonding *bond);
607void bond_debug_reregister(struct bonding *bond);
608const char *bond_mode_name(int mode);
609void bond_setup(struct net_device *bond_dev);
610unsigned int bond_get_num_tx_queues(void);
611int bond_netlink_init(void);
612void bond_netlink_fini(void);
613struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
614const char *bond_slave_link_status(s8 link);
615struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
616 struct net_device *end_dev,
617 int level);
618int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
619void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
620void bond_work_init_all(struct bonding *bond);
621
622#ifdef CONFIG_PROC_FS
623void bond_create_proc_entry(struct bonding *bond);
624void bond_remove_proc_entry(struct bonding *bond);
625void bond_create_proc_dir(struct bond_net *bn);
626void bond_destroy_proc_dir(struct bond_net *bn);
627#else
628static inline void bond_create_proc_entry(struct bonding *bond)
629{
630}
631
632static inline void bond_remove_proc_entry(struct bonding *bond)
633{
634}
635
636static inline void bond_create_proc_dir(struct bond_net *bn)
637{
638}
639
640static inline void bond_destroy_proc_dir(struct bond_net *bn)
641{
642}
643#endif
644
645static inline struct slave *bond_slave_has_mac(struct bonding *bond,
646 const u8 *mac)
647{
648 struct list_head *iter;
649 struct slave *tmp;
650
651 bond_for_each_slave(bond, tmp, iter)
652 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
653 return tmp;
654
655 return NULL;
656}
657
658/* Caller must hold rcu_read_lock() for read */
659static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
660 const u8 *mac)
661{
662 struct list_head *iter;
663 struct slave *tmp;
664
665 bond_for_each_slave_rcu(bond, tmp, iter)
666 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
667 return tmp;
668
669 return NULL;
670}
671
672/* Caller must hold rcu_read_lock() for read */
673static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
674{
675 struct list_head *iter;
676 struct slave *tmp;
677 struct netdev_hw_addr *ha;
678
679 bond_for_each_slave_rcu(bond, tmp, iter)
680 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
681 return true;
682
683 if (netdev_uc_empty(bond->dev))
684 return false;
685
686 netdev_for_each_uc_addr(ha, bond->dev)
687 if (ether_addr_equal_64bits(mac, ha->addr))
688 return true;
689
690 return false;
691}
692
693/* Check if the ip is present in arp ip list, or first free slot if ip == 0
694 * Returns -1 if not found, index if found
695 */
696static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
697{
698 int i;
699
700 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
701 if (targets[i] == ip)
702 return i;
703 else if (targets[i] == 0)
704 break;
705
706 return -1;
707}
708
709/* exported from bond_main.c */
710extern unsigned int bond_net_id;
711extern const struct bond_parm_tbl bond_lacp_tbl[];
712extern const struct bond_parm_tbl xmit_hashtype_tbl[];
713extern const struct bond_parm_tbl arp_validate_tbl[];
714extern const struct bond_parm_tbl arp_all_targets_tbl[];
715extern const struct bond_parm_tbl fail_over_mac_tbl[];
716extern const struct bond_parm_tbl pri_reselect_tbl[];
717extern struct bond_parm_tbl ad_select_tbl[];
718
719/* exported from bond_netlink.c */
720extern struct rtnl_link_ops bond_link_ops;
721
722static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
723{
724 atomic_long_inc(&dev->tx_dropped);
725 dev_kfree_skb_any(skb);
726}
727
728#endif /* _NET_BONDING_H */
1/* SPDX-License-Identifier: GPL-1.0+ */
2/*
3 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
4 *
5 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
6 * NCM: Network and Communications Management, Inc.
7 *
8 * BUT, I'm the one who modified it for ethernet, so:
9 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
10 *
11 */
12
13#ifndef _NET_BONDING_H
14#define _NET_BONDING_H
15
16#include <linux/timer.h>
17#include <linux/proc_fs.h>
18#include <linux/if_bonding.h>
19#include <linux/cpumask.h>
20#include <linux/in6.h>
21#include <linux/netpoll.h>
22#include <linux/inetdevice.h>
23#include <linux/etherdevice.h>
24#include <linux/reciprocal_div.h>
25#include <linux/if_link.h>
26
27#include <net/bond_3ad.h>
28#include <net/bond_alb.h>
29#include <net/bond_options.h>
30#include <net/ipv6.h>
31#include <net/addrconf.h>
32
33#define BOND_MAX_ARP_TARGETS 16
34#define BOND_MAX_NS_TARGETS BOND_MAX_ARP_TARGETS
35
36#define BOND_DEFAULT_MIIMON 100
37
38#ifndef __long_aligned
39#define __long_aligned __attribute__((aligned((sizeof(long)))))
40#endif
41
42#define slave_info(bond_dev, slave_dev, fmt, ...) \
43 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
44#define slave_warn(bond_dev, slave_dev, fmt, ...) \
45 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
46#define slave_dbg(bond_dev, slave_dev, fmt, ...) \
47 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
48#define slave_err(bond_dev, slave_dev, fmt, ...) \
49 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
50
51#define BOND_MODE(bond) ((bond)->params.mode)
52
53/* slave list primitives */
54#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
55
56#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
57
58/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
59#define bond_first_slave(bond) \
60 (bond_has_slaves(bond) ? \
61 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
62 NULL)
63#define bond_last_slave(bond) \
64 (bond_has_slaves(bond) ? \
65 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
66 NULL)
67
68/* Caller must have rcu_read_lock */
69#define bond_first_slave_rcu(bond) \
70 netdev_lower_get_first_private_rcu(bond->dev)
71
72#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
73#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
74
75/**
76 * bond_for_each_slave - iterate over all slaves
77 * @bond: the bond holding this list
78 * @pos: current slave
79 * @iter: list_head * iterator
80 *
81 * Caller must hold RTNL
82 */
83#define bond_for_each_slave(bond, pos, iter) \
84 netdev_for_each_lower_private((bond)->dev, pos, iter)
85
86/* Caller must have rcu_read_lock */
87#define bond_for_each_slave_rcu(bond, pos, iter) \
88 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
89
90#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
91 NETIF_F_GSO_ESP)
92
93#ifdef CONFIG_NET_POLL_CONTROLLER
94extern atomic_t netpoll_block_tx;
95
96static inline void block_netpoll_tx(void)
97{
98 atomic_inc(&netpoll_block_tx);
99}
100
101static inline void unblock_netpoll_tx(void)
102{
103 atomic_dec(&netpoll_block_tx);
104}
105
106static inline int is_netpoll_tx_blocked(struct net_device *dev)
107{
108 if (unlikely(netpoll_tx_running(dev)))
109 return atomic_read(&netpoll_block_tx);
110 return 0;
111}
112#else
113#define block_netpoll_tx()
114#define unblock_netpoll_tx()
115#define is_netpoll_tx_blocked(dev) (0)
116#endif
117
118struct bond_params {
119 int mode;
120 int xmit_policy;
121 int miimon;
122 u8 num_peer_notif;
123 u8 missed_max;
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_active;
133 int lacp_fast;
134 unsigned int min_links;
135 int ad_select;
136 char primary[IFNAMSIZ];
137 int primary_reselect;
138 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
139 int tx_queues;
140 int all_slaves_active;
141 int resend_igmp;
142 int lp_interval;
143 int packets_per_slave;
144 int tlb_dynamic_lb;
145 struct reciprocal_value reciprocal_packets_per_slave;
146 u16 ad_actor_sys_prio;
147 u16 ad_user_port_key;
148#if IS_ENABLED(CONFIG_IPV6)
149 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
150#endif
151
152 /* 2 bytes of padding : see ether_addr_equal_64bits() */
153 u8 ad_actor_system[ETH_ALEN + 2];
154};
155
156struct slave {
157 struct net_device *dev; /* first - useful for panic debug */
158 struct bonding *bond; /* our master */
159 int delay;
160 /* all 4 in jiffies */
161 unsigned long last_link_up;
162 unsigned long last_tx;
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 int prio;
179 struct ad_slave_info *ad_info;
180 struct tlb_slave_info tlb_info;
181#ifdef CONFIG_NET_POLL_CONTROLLER
182 struct netpoll *np;
183#endif
184 struct delayed_work notify_work;
185 struct kobject kobj;
186 struct rtnl_link_stats64 slave_stats;
187};
188
189static inline struct slave *to_slave(struct kobject *kobj)
190{
191 return container_of(kobj, struct slave, kobj);
192}
193
194struct bond_up_slave {
195 unsigned int count;
196 struct rcu_head rcu;
197 struct slave *arr[];
198};
199
200/*
201 * Link pseudo-state only used internally by monitors
202 */
203#define BOND_LINK_NOCHANGE -1
204
205struct bond_ipsec {
206 struct list_head list;
207 struct xfrm_state *xs;
208};
209
210/*
211 * Here are the locking policies for the two bonding locks:
212 * Get rcu_read_lock when reading or RTNL when writing slave list.
213 */
214struct bonding {
215 struct net_device *dev; /* first - useful for panic debug */
216 struct slave __rcu *curr_active_slave;
217 struct slave __rcu *current_arp_slave;
218 struct slave __rcu *primary_slave;
219 struct bond_up_slave __rcu *usable_slaves;
220 struct bond_up_slave __rcu *all_slaves;
221 bool force_primary;
222 bool notifier_ctx;
223 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
224 int (*recv_probe)(const struct sk_buff *, struct bonding *,
225 struct slave *);
226 /* mode_lock is used for mode-specific locking needs, currently used by:
227 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
228 * bond_3ad_state_machine_handler() concurrently and also
229 * the access to the state machine shared variables.
230 * TLB mode (5) - to sync the use and modifications of its hash table
231 * ALB mode (6) - to sync the use and modifications of its hash table
232 */
233 spinlock_t mode_lock;
234 spinlock_t stats_lock;
235 u32 send_peer_notif;
236 u8 igmp_retrans;
237#ifdef CONFIG_PROC_FS
238 struct proc_dir_entry *proc_entry;
239 char proc_file_name[IFNAMSIZ];
240#endif /* CONFIG_PROC_FS */
241 struct list_head bond_list;
242 u32 __percpu *rr_tx_counter;
243 struct ad_bond_info ad_info;
244 struct alb_bond_info alb_info;
245 struct bond_params params;
246 struct workqueue_struct *wq;
247 struct delayed_work mii_work;
248 struct delayed_work arp_work;
249 struct delayed_work alb_work;
250 struct delayed_work ad_work;
251 struct delayed_work mcast_work;
252 struct delayed_work slave_arr_work;
253#ifdef CONFIG_DEBUG_FS
254 /* debugging support via debugfs */
255 struct dentry *debug_dir;
256#endif /* CONFIG_DEBUG_FS */
257 struct rtnl_link_stats64 bond_stats;
258#ifdef CONFIG_XFRM_OFFLOAD
259 struct list_head ipsec_list;
260 /* protecting ipsec_list */
261 spinlock_t ipsec_lock;
262#endif /* CONFIG_XFRM_OFFLOAD */
263 struct bpf_prog *xdp_prog;
264};
265
266#define bond_slave_get_rcu(dev) \
267 ((struct slave *) rcu_dereference(dev->rx_handler_data))
268
269#define bond_slave_get_rtnl(dev) \
270 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
271
272void bond_queue_slave_event(struct slave *slave);
273void bond_lower_state_changed(struct slave *slave);
274
275struct bond_vlan_tag {
276 __be16 vlan_proto;
277 unsigned short vlan_id;
278};
279
280/*
281 * Returns NULL if the net_device does not belong to any of the bond's slaves
282 *
283 * Caller must hold bond lock for read
284 */
285static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
286 struct net_device *slave_dev)
287{
288 return netdev_lower_dev_get_private(bond->dev, slave_dev);
289}
290
291static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
292{
293 return slave->bond;
294}
295
296static inline bool bond_should_override_tx_queue(struct bonding *bond)
297{
298 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
299 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
300}
301
302static inline bool bond_is_lb(const struct bonding *bond)
303{
304 return BOND_MODE(bond) == BOND_MODE_TLB ||
305 BOND_MODE(bond) == BOND_MODE_ALB;
306}
307
308static inline bool bond_needs_speed_duplex(const struct bonding *bond)
309{
310 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
311}
312
313static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
314{
315 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
316}
317
318static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
319{
320 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
321 BOND_MODE(bond) == BOND_MODE_XOR ||
322 BOND_MODE(bond) == BOND_MODE_TLB ||
323 BOND_MODE(bond) == BOND_MODE_ALB);
324}
325
326static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
327{
328 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
329 BOND_MODE(bond) == BOND_MODE_XOR ||
330 bond_is_nondyn_tlb(bond));
331}
332
333static inline bool bond_mode_uses_arp(int mode)
334{
335 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
336 mode != BOND_MODE_ALB;
337}
338
339static inline bool bond_mode_uses_primary(int mode)
340{
341 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
342 mode == BOND_MODE_ALB;
343}
344
345static inline bool bond_uses_primary(struct bonding *bond)
346{
347 return bond_mode_uses_primary(BOND_MODE(bond));
348}
349
350static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
351{
352 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
353
354 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
355}
356
357static inline bool bond_slave_is_up(struct slave *slave)
358{
359 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
360}
361
362static inline void bond_set_active_slave(struct slave *slave)
363{
364 if (slave->backup) {
365 slave->backup = 0;
366 bond_queue_slave_event(slave);
367 bond_lower_state_changed(slave);
368 }
369}
370
371static inline void bond_set_backup_slave(struct slave *slave)
372{
373 if (!slave->backup) {
374 slave->backup = 1;
375 bond_queue_slave_event(slave);
376 bond_lower_state_changed(slave);
377 }
378}
379
380static inline void bond_set_slave_state(struct slave *slave,
381 int slave_state, bool notify)
382{
383 if (slave->backup == slave_state)
384 return;
385
386 slave->backup = slave_state;
387 if (notify) {
388 bond_lower_state_changed(slave);
389 bond_queue_slave_event(slave);
390 slave->should_notify = 0;
391 } else {
392 if (slave->should_notify)
393 slave->should_notify = 0;
394 else
395 slave->should_notify = 1;
396 }
397}
398
399static inline void bond_slave_state_change(struct bonding *bond)
400{
401 struct list_head *iter;
402 struct slave *tmp;
403
404 bond_for_each_slave(bond, tmp, iter) {
405 if (tmp->link == BOND_LINK_UP)
406 bond_set_active_slave(tmp);
407 else if (tmp->link == BOND_LINK_DOWN)
408 bond_set_backup_slave(tmp);
409 }
410}
411
412static inline void bond_slave_state_notify(struct bonding *bond)
413{
414 struct list_head *iter;
415 struct slave *tmp;
416
417 bond_for_each_slave(bond, tmp, iter) {
418 if (tmp->should_notify) {
419 bond_lower_state_changed(tmp);
420 tmp->should_notify = 0;
421 }
422 }
423}
424
425static inline int bond_slave_state(struct slave *slave)
426{
427 return slave->backup;
428}
429
430static inline bool bond_is_active_slave(struct slave *slave)
431{
432 return !bond_slave_state(slave);
433}
434
435static inline bool bond_slave_can_tx(struct slave *slave)
436{
437 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
438 bond_is_active_slave(slave);
439}
440
441static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
442{
443 struct slave *slave;
444 bool active;
445
446 rcu_read_lock();
447 slave = bond_slave_get_rcu(slave_dev);
448 active = bond_is_active_slave(slave);
449 rcu_read_unlock();
450
451 return active;
452}
453
454static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
455{
456 if (len == ETH_ALEN) {
457 ether_addr_copy(dst, src);
458 return;
459 }
460
461 memcpy(dst, src, len);
462}
463
464#define BOND_PRI_RESELECT_ALWAYS 0
465#define BOND_PRI_RESELECT_BETTER 1
466#define BOND_PRI_RESELECT_FAILURE 2
467
468#define BOND_FOM_NONE 0
469#define BOND_FOM_ACTIVE 1
470#define BOND_FOM_FOLLOW 2
471
472#define BOND_ARP_TARGETS_ANY 0
473#define BOND_ARP_TARGETS_ALL 1
474
475#define BOND_ARP_VALIDATE_NONE 0
476#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
477#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
478#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
479 BOND_ARP_VALIDATE_BACKUP)
480#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
481#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
482 BOND_ARP_FILTER)
483#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
484 BOND_ARP_FILTER)
485
486#define BOND_SLAVE_NOTIFY_NOW true
487#define BOND_SLAVE_NOTIFY_LATER false
488
489static inline int slave_do_arp_validate(struct bonding *bond,
490 struct slave *slave)
491{
492 return bond->params.arp_validate & (1 << bond_slave_state(slave));
493}
494
495static inline int slave_do_arp_validate_only(struct bonding *bond)
496{
497 return bond->params.arp_validate & BOND_ARP_FILTER;
498}
499
500static inline int bond_is_ip_target_ok(__be32 addr)
501{
502 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
503}
504
505#if IS_ENABLED(CONFIG_IPV6)
506static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
507{
508 return !ipv6_addr_any(addr) &&
509 !ipv6_addr_loopback(addr) &&
510 !ipv6_addr_is_multicast(addr);
511}
512#endif
513
514/* Get the oldest arp which we've received on this slave for bond's
515 * arp_targets.
516 */
517static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
518 struct slave *slave)
519{
520 int i = 1;
521 unsigned long ret = slave->target_last_arp_rx[0];
522
523 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
524 if (time_before(slave->target_last_arp_rx[i], ret))
525 ret = slave->target_last_arp_rx[i];
526
527 return ret;
528}
529
530static inline unsigned long slave_last_rx(struct bonding *bond,
531 struct slave *slave)
532{
533 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
534 return slave_oldest_target_arp_rx(bond, slave);
535
536 return slave->last_rx;
537}
538
539static inline void slave_update_last_tx(struct slave *slave)
540{
541 WRITE_ONCE(slave->last_tx, jiffies);
542}
543
544static inline unsigned long slave_last_tx(struct slave *slave)
545{
546 return READ_ONCE(slave->last_tx);
547}
548
549#ifdef CONFIG_NET_POLL_CONTROLLER
550static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
551 struct sk_buff *skb)
552{
553 return netpoll_send_skb(slave->np, skb);
554}
555#else
556static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
557 struct sk_buff *skb)
558{
559 BUG();
560 return NETDEV_TX_OK;
561}
562#endif
563
564static inline void bond_set_slave_inactive_flags(struct slave *slave,
565 bool notify)
566{
567 if (!bond_is_lb(slave->bond))
568 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
569 if (!slave->bond->params.all_slaves_active)
570 slave->inactive = 1;
571}
572
573static inline void bond_set_slave_active_flags(struct slave *slave,
574 bool notify)
575{
576 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
577 slave->inactive = 0;
578}
579
580static inline bool bond_is_slave_inactive(struct slave *slave)
581{
582 return slave->inactive;
583}
584
585static inline void bond_propose_link_state(struct slave *slave, int state)
586{
587 slave->link_new_state = state;
588}
589
590static inline void bond_commit_link_state(struct slave *slave, bool notify)
591{
592 if (slave->link_new_state == BOND_LINK_NOCHANGE)
593 return;
594
595 slave->link = slave->link_new_state;
596 if (notify) {
597 bond_queue_slave_event(slave);
598 bond_lower_state_changed(slave);
599 slave->should_notify_link = 0;
600 } else {
601 if (slave->should_notify_link)
602 slave->should_notify_link = 0;
603 else
604 slave->should_notify_link = 1;
605 }
606}
607
608static inline void bond_set_slave_link_state(struct slave *slave, int state,
609 bool notify)
610{
611 bond_propose_link_state(slave, state);
612 bond_commit_link_state(slave, notify);
613}
614
615static inline void bond_slave_link_notify(struct bonding *bond)
616{
617 struct list_head *iter;
618 struct slave *tmp;
619
620 bond_for_each_slave(bond, tmp, iter) {
621 if (tmp->should_notify_link) {
622 bond_queue_slave_event(tmp);
623 bond_lower_state_changed(tmp);
624 tmp->should_notify_link = 0;
625 }
626 }
627}
628
629static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
630{
631 struct in_device *in_dev;
632 __be32 addr = 0;
633
634 rcu_read_lock();
635 in_dev = __in_dev_get_rcu(dev);
636
637 if (in_dev)
638 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
639 RT_SCOPE_HOST);
640 rcu_read_unlock();
641 return addr;
642}
643
644struct bond_net {
645 struct net *net; /* Associated network namespace */
646 struct list_head dev_list;
647#ifdef CONFIG_PROC_FS
648 struct proc_dir_entry *proc_dir;
649#endif
650 struct class_attribute class_attr_bonding_masters;
651};
652
653int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
654netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
655int bond_create(struct net *net, const char *name);
656int bond_create_sysfs(struct bond_net *net);
657void bond_destroy_sysfs(struct bond_net *net);
658void bond_prepare_sysfs_group(struct bonding *bond);
659int bond_sysfs_slave_add(struct slave *slave);
660void bond_sysfs_slave_del(struct slave *slave);
661void bond_xdp_set_features(struct net_device *bond_dev);
662int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
663 struct netlink_ext_ack *extack);
664int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
665u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
666int bond_set_carrier(struct bonding *bond);
667void bond_select_active_slave(struct bonding *bond);
668void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
669void bond_create_debugfs(void);
670void bond_destroy_debugfs(void);
671void bond_debug_register(struct bonding *bond);
672void bond_debug_unregister(struct bonding *bond);
673void bond_debug_reregister(struct bonding *bond);
674const char *bond_mode_name(int mode);
675void bond_setup(struct net_device *bond_dev);
676unsigned int bond_get_num_tx_queues(void);
677int bond_netlink_init(void);
678void bond_netlink_fini(void);
679struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
680const char *bond_slave_link_status(s8 link);
681struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
682 struct net_device *end_dev,
683 int level);
684int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
685void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
686void bond_work_init_all(struct bonding *bond);
687
688#ifdef CONFIG_PROC_FS
689void bond_create_proc_entry(struct bonding *bond);
690void bond_remove_proc_entry(struct bonding *bond);
691void bond_create_proc_dir(struct bond_net *bn);
692void bond_destroy_proc_dir(struct bond_net *bn);
693#else
694static inline void bond_create_proc_entry(struct bonding *bond)
695{
696}
697
698static inline void bond_remove_proc_entry(struct bonding *bond)
699{
700}
701
702static inline void bond_create_proc_dir(struct bond_net *bn)
703{
704}
705
706static inline void bond_destroy_proc_dir(struct bond_net *bn)
707{
708}
709#endif
710
711static inline struct slave *bond_slave_has_mac(struct bonding *bond,
712 const u8 *mac)
713{
714 struct list_head *iter;
715 struct slave *tmp;
716
717 bond_for_each_slave(bond, tmp, iter)
718 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
719 return tmp;
720
721 return NULL;
722}
723
724/* Caller must hold rcu_read_lock() for read */
725static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac)
726{
727 struct list_head *iter;
728 struct slave *tmp;
729
730 bond_for_each_slave_rcu(bond, tmp, iter)
731 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
732 return true;
733 return false;
734}
735
736/* Check if the ip is present in arp ip list, or first free slot if ip == 0
737 * Returns -1 if not found, index if found
738 */
739static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
740{
741 int i;
742
743 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
744 if (targets[i] == ip)
745 return i;
746 else if (targets[i] == 0)
747 break;
748
749 return -1;
750}
751
752#if IS_ENABLED(CONFIG_IPV6)
753static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
754{
755 struct in6_addr mcaddr;
756 int i;
757
758 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
759 addrconf_addr_solict_mult(&targets[i], &mcaddr);
760 if ((ipv6_addr_equal(&targets[i], ip)) ||
761 (ipv6_addr_equal(&mcaddr, ip)))
762 return i;
763 else if (ipv6_addr_any(&targets[i]))
764 break;
765 }
766
767 return -1;
768}
769#endif
770
771/* exported from bond_main.c */
772extern unsigned int bond_net_id;
773
774/* exported from bond_netlink.c */
775extern struct rtnl_link_ops bond_link_ops;
776
777/* exported from bond_sysfs_slave.c */
778extern const struct sysfs_ops slave_sysfs_ops;
779
780/* exported from bond_3ad.c */
781extern const u8 lacpdu_mcast_addr[];
782
783static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
784{
785 dev_core_stats_tx_dropped_inc(dev);
786 dev_kfree_skb_any(skb);
787 return NET_XMIT_DROP;
788}
789
790#endif /* _NET_BONDING_H */