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(v: &netpoll_block_tx);
99}
100
101static inline void unblock_netpoll_tx(void)
102{
103 atomic_dec(v: &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(v: &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
118DECLARE_STATIC_KEY_FALSE(bond_bcast_neigh_enabled);
119
120struct bond_params {
121 int mode;
122 int xmit_policy;
123 int miimon;
124 u8 num_peer_notif;
125 u8 missed_max;
126 int arp_interval;
127 int arp_validate;
128 int arp_all_targets;
129 int fail_over_mac;
130 int updelay;
131 int downdelay;
132 int peer_notif_delay;
133 int lacp_active;
134 int lacp_fast;
135 unsigned int min_links;
136 int ad_select;
137 char primary[IFNAMSIZ];
138 int primary_reselect;
139 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
140 int tx_queues;
141 int all_slaves_active;
142 int resend_igmp;
143 int lp_interval;
144 int packets_per_slave;
145 int tlb_dynamic_lb;
146 struct reciprocal_value reciprocal_packets_per_slave;
147 u16 ad_actor_sys_prio;
148 u16 ad_user_port_key;
149#if IS_ENABLED(CONFIG_IPV6)
150 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
151#endif
152 int coupled_control;
153 int broadcast_neighbor;
154
155 /* 2 bytes of padding : see ether_addr_equal_64bits() */
156 u8 ad_actor_system[ETH_ALEN + 2];
157};
158
159struct slave {
160 struct net_device *dev; /* first - useful for panic debug */
161 struct bonding *bond; /* our master */
162 int delay;
163 /* all 4 in jiffies */
164 unsigned long last_link_up;
165 unsigned long last_tx;
166 unsigned long last_rx;
167 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
168 s8 link; /* one of BOND_LINK_XXXX */
169 s8 link_new_state; /* one of BOND_LINK_XXXX */
170 u8 backup:1, /* indicates backup slave. Value corresponds with
171 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
172 inactive:1, /* indicates inactive slave */
173 rx_disabled:1, /* indicates whether slave's Rx is disabled */
174 should_notify:1, /* indicates whether the state changed */
175 should_notify_link:1; /* indicates whether the link changed */
176 u8 duplex;
177 u32 original_mtu;
178 u32 link_failure_count;
179 u32 speed;
180 u16 queue_id;
181 u8 perm_hwaddr[MAX_ADDR_LEN];
182 int prio;
183 struct ad_slave_info *ad_info;
184 struct tlb_slave_info tlb_info;
185#ifdef CONFIG_NET_POLL_CONTROLLER
186 struct netpoll *np;
187#endif
188 struct delayed_work notify_work;
189 struct kobject kobj;
190 struct rtnl_link_stats64 slave_stats;
191};
192
193static inline struct slave *to_slave(struct kobject *kobj)
194{
195 return container_of(kobj, struct slave, kobj);
196}
197
198struct bond_up_slave {
199 unsigned int count;
200 struct rcu_head rcu;
201 struct slave *arr[];
202};
203
204/*
205 * Link pseudo-state only used internally by monitors
206 */
207#define BOND_LINK_NOCHANGE -1
208
209struct bond_ipsec {
210 struct list_head list;
211 struct xfrm_state *xs;
212};
213
214/*
215 * Here are the locking policies for the two bonding locks:
216 * Get rcu_read_lock when reading or RTNL when writing slave list.
217 */
218struct bonding {
219 struct net_device *dev; /* first - useful for panic debug */
220 struct slave __rcu *curr_active_slave;
221 struct slave __rcu *current_arp_slave;
222 struct slave __rcu *primary_slave;
223 struct bond_up_slave __rcu *usable_slaves;
224 struct bond_up_slave __rcu *all_slaves;
225 bool force_primary;
226 bool notifier_ctx;
227 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
228 int (*recv_probe)(const struct sk_buff *, struct bonding *,
229 struct slave *);
230 /* mode_lock is used for mode-specific locking needs, currently used by:
231 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
232 * bond_3ad_state_machine_handler() concurrently and also
233 * the access to the state machine shared variables.
234 * TLB mode (5) - to sync the use and modifications of its hash table
235 * ALB mode (6) - to sync the use and modifications of its hash table
236 */
237 spinlock_t mode_lock;
238 spinlock_t stats_lock;
239 u32 send_peer_notif;
240 u8 igmp_retrans;
241#ifdef CONFIG_PROC_FS
242 struct proc_dir_entry *proc_entry;
243 char proc_file_name[IFNAMSIZ];
244#endif /* CONFIG_PROC_FS */
245 struct list_head bond_list;
246 u32 __percpu *rr_tx_counter;
247 struct ad_bond_info ad_info;
248 struct alb_bond_info alb_info;
249 struct bond_params params;
250 struct workqueue_struct *wq;
251 struct delayed_work mii_work;
252 struct delayed_work arp_work;
253 struct delayed_work alb_work;
254 struct delayed_work ad_work;
255 struct delayed_work mcast_work;
256 struct delayed_work slave_arr_work;
257#ifdef CONFIG_DEBUG_FS
258 /* debugging support via debugfs */
259 struct dentry *debug_dir;
260#endif /* CONFIG_DEBUG_FS */
261 struct rtnl_link_stats64 bond_stats;
262#ifdef CONFIG_XFRM_OFFLOAD
263 struct list_head ipsec_list;
264 /* protecting ipsec_list */
265 struct mutex ipsec_lock;
266#endif /* CONFIG_XFRM_OFFLOAD */
267 struct bpf_prog *xdp_prog;
268};
269
270#define bond_slave_get_rcu(dev) \
271 ((struct slave *) rcu_dereference(dev->rx_handler_data))
272
273#define bond_slave_get_rtnl(dev) \
274 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
275
276void bond_queue_slave_event(struct slave *slave);
277void bond_lower_state_changed(struct slave *slave);
278
279struct bond_vlan_tag {
280 __be16 vlan_proto;
281 unsigned short vlan_id;
282};
283
284/*
285 * Returns NULL if the net_device does not belong to any of the bond's slaves
286 *
287 * Caller must hold bond lock for read
288 */
289static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
290 struct net_device *slave_dev)
291{
292 return netdev_lower_dev_get_private(dev: bond->dev, lower_dev: slave_dev);
293}
294
295static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
296{
297 return slave->bond;
298}
299
300static inline bool bond_should_override_tx_queue(struct bonding *bond)
301{
302 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
303 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
304}
305
306static inline bool bond_is_lb(const struct bonding *bond)
307{
308 return BOND_MODE(bond) == BOND_MODE_TLB ||
309 BOND_MODE(bond) == BOND_MODE_ALB;
310}
311
312static inline bool bond_needs_speed_duplex(const struct bonding *bond)
313{
314 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
315}
316
317static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
318{
319 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
320}
321
322static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
323{
324 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
325 BOND_MODE(bond) == BOND_MODE_XOR ||
326 BOND_MODE(bond) == BOND_MODE_TLB ||
327 BOND_MODE(bond) == BOND_MODE_ALB);
328}
329
330static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
331{
332 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
333 BOND_MODE(bond) == BOND_MODE_XOR ||
334 bond_is_nondyn_tlb(bond));
335}
336
337static inline bool bond_mode_uses_arp(int mode)
338{
339 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
340 mode != BOND_MODE_ALB;
341}
342
343static inline bool bond_mode_uses_primary(int mode)
344{
345 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
346 mode == BOND_MODE_ALB;
347}
348
349static inline bool bond_uses_primary(struct bonding *bond)
350{
351 return bond_mode_uses_primary(BOND_MODE(bond));
352}
353
354static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
355{
356 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
357
358 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
359}
360
361static inline bool bond_slave_is_up(struct slave *slave)
362{
363 return netif_running(dev: slave->dev) && netif_carrier_ok(dev: slave->dev);
364}
365
366static inline void bond_set_active_slave(struct slave *slave)
367{
368 if (slave->backup) {
369 slave->backup = 0;
370 bond_queue_slave_event(slave);
371 bond_lower_state_changed(slave);
372 }
373}
374
375static inline void bond_set_backup_slave(struct slave *slave)
376{
377 if (!slave->backup) {
378 slave->backup = 1;
379 bond_queue_slave_event(slave);
380 bond_lower_state_changed(slave);
381 }
382}
383
384static inline void bond_set_slave_state(struct slave *slave,
385 int slave_state, bool notify)
386{
387 if (slave->backup == slave_state)
388 return;
389
390 slave->backup = slave_state;
391 if (notify) {
392 bond_lower_state_changed(slave);
393 bond_queue_slave_event(slave);
394 slave->should_notify = 0;
395 } else {
396 if (slave->should_notify)
397 slave->should_notify = 0;
398 else
399 slave->should_notify = 1;
400 }
401}
402
403static inline void bond_slave_state_change(struct bonding *bond)
404{
405 struct list_head *iter;
406 struct slave *tmp;
407
408 bond_for_each_slave(bond, tmp, iter) {
409 if (tmp->link == BOND_LINK_UP)
410 bond_set_active_slave(slave: tmp);
411 else if (tmp->link == BOND_LINK_DOWN)
412 bond_set_backup_slave(slave: tmp);
413 }
414}
415
416static inline void bond_slave_state_notify(struct bonding *bond)
417{
418 struct list_head *iter;
419 struct slave *tmp;
420
421 bond_for_each_slave(bond, tmp, iter) {
422 if (tmp->should_notify) {
423 bond_lower_state_changed(slave: tmp);
424 tmp->should_notify = 0;
425 }
426 }
427}
428
429static inline int bond_slave_state(struct slave *slave)
430{
431 return slave->backup;
432}
433
434static inline bool bond_is_active_slave(struct slave *slave)
435{
436 return !bond_slave_state(slave);
437}
438
439static inline bool bond_slave_can_tx(struct slave *slave)
440{
441 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
442 bond_is_active_slave(slave);
443}
444
445static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
446{
447 struct slave *slave;
448 bool active;
449
450 rcu_read_lock();
451 slave = bond_slave_get_rcu(slave_dev);
452 active = bond_is_active_slave(slave);
453 rcu_read_unlock();
454
455 return active;
456}
457
458static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
459{
460 if (len == ETH_ALEN) {
461 ether_addr_copy(dst, src);
462 return;
463 }
464
465 memcpy(dst, src, len);
466}
467
468#define BOND_PRI_RESELECT_ALWAYS 0
469#define BOND_PRI_RESELECT_BETTER 1
470#define BOND_PRI_RESELECT_FAILURE 2
471
472#define BOND_FOM_NONE 0
473#define BOND_FOM_ACTIVE 1
474#define BOND_FOM_FOLLOW 2
475
476#define BOND_ARP_TARGETS_ANY 0
477#define BOND_ARP_TARGETS_ALL 1
478
479#define BOND_ARP_VALIDATE_NONE 0
480#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
481#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
482#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
483 BOND_ARP_VALIDATE_BACKUP)
484#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
485#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
486 BOND_ARP_FILTER)
487#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
488 BOND_ARP_FILTER)
489
490#define BOND_SLAVE_NOTIFY_NOW true
491#define BOND_SLAVE_NOTIFY_LATER false
492
493static inline int slave_do_arp_validate(struct bonding *bond,
494 struct slave *slave)
495{
496 return bond->params.arp_validate & (1 << bond_slave_state(slave));
497}
498
499static inline int slave_do_arp_validate_only(struct bonding *bond)
500{
501 return bond->params.arp_validate & BOND_ARP_FILTER;
502}
503
504static inline int bond_is_ip_target_ok(__be32 addr)
505{
506 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
507}
508
509#if IS_ENABLED(CONFIG_IPV6)
510static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
511{
512 return !ipv6_addr_any(a: addr) &&
513 !ipv6_addr_loopback(a: addr) &&
514 !ipv6_addr_is_multicast(addr);
515}
516#endif
517
518/* Get the oldest arp which we've received on this slave for bond's
519 * arp_targets.
520 */
521static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
522 struct slave *slave)
523{
524 unsigned long tmp, ret = READ_ONCE(slave->target_last_arp_rx[0]);
525 int i = 1;
526
527 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) {
528 tmp = READ_ONCE(slave->target_last_arp_rx[i]);
529 if (time_before(tmp, ret))
530 ret = tmp;
531 }
532 return ret;
533}
534
535static inline unsigned long slave_last_rx(struct bonding *bond,
536 struct slave *slave)
537{
538 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
539 return slave_oldest_target_arp_rx(bond, slave);
540
541 return READ_ONCE(slave->last_rx);
542}
543
544static inline void slave_update_last_tx(struct slave *slave)
545{
546 WRITE_ONCE(slave->last_tx, jiffies);
547}
548
549static inline unsigned long slave_last_tx(struct slave *slave)
550{
551 return READ_ONCE(slave->last_tx);
552}
553
554#ifdef CONFIG_NET_POLL_CONTROLLER
555static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
556 struct sk_buff *skb)
557{
558 return netpoll_send_skb(np: slave->np, skb);
559}
560#else
561static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
562 struct sk_buff *skb)
563{
564 BUG();
565 return NETDEV_TX_OK;
566}
567#endif
568
569static inline void bond_set_slave_inactive_flags(struct slave *slave,
570 bool notify)
571{
572 if (!bond_is_lb(bond: slave->bond))
573 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
574 if (!slave->bond->params.all_slaves_active)
575 slave->inactive = 1;
576 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
577 slave->rx_disabled = 1;
578}
579
580static inline void bond_set_slave_tx_disabled_flags(struct slave *slave,
581 bool notify)
582{
583 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
584}
585
586static inline void bond_set_slave_active_flags(struct slave *slave,
587 bool notify)
588{
589 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
590 slave->inactive = 0;
591 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
592 slave->rx_disabled = 0;
593}
594
595static inline void bond_set_slave_rx_enabled_flags(struct slave *slave,
596 bool notify)
597{
598 slave->rx_disabled = 0;
599}
600
601static inline bool bond_is_slave_inactive(struct slave *slave)
602{
603 return slave->inactive;
604}
605
606static inline bool bond_is_slave_rx_disabled(struct slave *slave)
607{
608 return slave->rx_disabled;
609}
610
611static inline void bond_propose_link_state(struct slave *slave, int state)
612{
613 slave->link_new_state = state;
614}
615
616static inline void bond_commit_link_state(struct slave *slave, bool notify)
617{
618 if (slave->link_new_state == BOND_LINK_NOCHANGE)
619 return;
620
621 slave->link = slave->link_new_state;
622 if (notify) {
623 bond_queue_slave_event(slave);
624 bond_lower_state_changed(slave);
625 slave->should_notify_link = 0;
626 } else {
627 if (slave->should_notify_link)
628 slave->should_notify_link = 0;
629 else
630 slave->should_notify_link = 1;
631 }
632}
633
634static inline void bond_set_slave_link_state(struct slave *slave, int state,
635 bool notify)
636{
637 bond_propose_link_state(slave, state);
638 bond_commit_link_state(slave, notify);
639}
640
641static inline void bond_slave_link_notify(struct bonding *bond)
642{
643 struct list_head *iter;
644 struct slave *tmp;
645
646 bond_for_each_slave(bond, tmp, iter) {
647 if (tmp->should_notify_link) {
648 bond_queue_slave_event(slave: tmp);
649 bond_lower_state_changed(slave: tmp);
650 tmp->should_notify_link = 0;
651 }
652 }
653}
654
655static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
656{
657 struct in_device *in_dev;
658 __be32 addr = 0;
659
660 rcu_read_lock();
661 in_dev = __in_dev_get_rcu(dev);
662
663 if (in_dev)
664 addr = inet_confirm_addr(net: dev_net(dev), in_dev, dst, local,
665 scope: RT_SCOPE_HOST);
666 rcu_read_unlock();
667 return addr;
668}
669
670struct bond_net {
671 struct net *net; /* Associated network namespace */
672 struct list_head dev_list;
673#ifdef CONFIG_PROC_FS
674 struct proc_dir_entry *proc_dir;
675#endif
676 struct class_attribute class_attr_bonding_masters;
677};
678
679int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
680netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
681int bond_create(struct net *net, const char *name);
682int bond_create_sysfs(struct bond_net *net);
683void bond_destroy_sysfs(struct bond_net *net);
684void bond_prepare_sysfs_group(struct bonding *bond);
685int bond_sysfs_slave_add(struct slave *slave);
686void bond_sysfs_slave_del(struct slave *slave);
687void bond_xdp_set_features(struct net_device *bond_dev);
688int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
689 struct netlink_ext_ack *extack);
690int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
691u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
692int bond_set_carrier(struct bonding *bond);
693void bond_select_active_slave(struct bonding *bond);
694void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
695void bond_create_debugfs(void);
696void bond_destroy_debugfs(void);
697void bond_debug_register(struct bonding *bond);
698void bond_debug_unregister(struct bonding *bond);
699void bond_debug_reregister(struct bonding *bond);
700const char *bond_mode_name(int mode);
701bool bond_xdp_check(struct bonding *bond, int mode);
702void bond_setup(struct net_device *bond_dev);
703unsigned int bond_get_num_tx_queues(void);
704int bond_netlink_init(void);
705void bond_netlink_fini(void);
706struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
707const char *bond_slave_link_status(s8 link);
708struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
709 struct net_device *end_dev,
710 int level);
711int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
712void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
713void bond_work_init_all(struct bonding *bond);
714void bond_work_cancel_all(struct bonding *bond);
715
716#ifdef CONFIG_PROC_FS
717void bond_create_proc_entry(struct bonding *bond);
718void bond_remove_proc_entry(struct bonding *bond);
719void bond_create_proc_dir(struct bond_net *bn);
720void bond_destroy_proc_dir(struct bond_net *bn);
721#else
722static inline void bond_create_proc_entry(struct bonding *bond)
723{
724}
725
726static inline void bond_remove_proc_entry(struct bonding *bond)
727{
728}
729
730static inline void bond_create_proc_dir(struct bond_net *bn)
731{
732}
733
734static inline void bond_destroy_proc_dir(struct bond_net *bn)
735{
736}
737#endif
738
739static inline struct slave *bond_slave_has_mac(struct bonding *bond,
740 const u8 *mac)
741{
742 struct list_head *iter;
743 struct slave *tmp;
744
745 bond_for_each_slave(bond, tmp, iter)
746 if (ether_addr_equal_64bits(addr1: mac, addr2: tmp->dev->dev_addr))
747 return tmp;
748
749 return NULL;
750}
751
752/* Caller must hold rcu_read_lock() for read */
753static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac)
754{
755 struct list_head *iter;
756 struct slave *tmp;
757
758 bond_for_each_slave_rcu(bond, tmp, iter)
759 if (ether_addr_equal_64bits(addr1: mac, addr2: tmp->dev->dev_addr))
760 return true;
761 return false;
762}
763
764/* Check if the ip is present in arp ip list, or first free slot if ip == 0
765 * Returns -1 if not found, index if found
766 */
767static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
768{
769 int i;
770
771 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
772 if (targets[i] == ip)
773 return i;
774 else if (targets[i] == 0)
775 break;
776
777 return -1;
778}
779
780#if IS_ENABLED(CONFIG_IPV6)
781static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
782{
783 struct in6_addr mcaddr;
784 int i;
785
786 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
787 addrconf_addr_solict_mult(addr: &targets[i], solicited: &mcaddr);
788 if ((ipv6_addr_equal(a1: &targets[i], a2: ip)) ||
789 (ipv6_addr_equal(a1: &mcaddr, a2: ip)))
790 return i;
791 else if (ipv6_addr_any(a: &targets[i]))
792 break;
793 }
794
795 return -1;
796}
797#endif
798
799/* exported from bond_main.c */
800extern unsigned int bond_net_id;
801
802/* exported from bond_netlink.c */
803extern struct rtnl_link_ops bond_link_ops;
804
805/* exported from bond_sysfs_slave.c */
806extern const struct sysfs_ops slave_sysfs_ops;
807
808/* exported from bond_3ad.c */
809extern const u8 lacpdu_mcast_addr[];
810
811static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
812{
813 dev_core_stats_tx_dropped_inc(dev);
814 dev_kfree_skb_any(skb);
815 return NET_XMIT_DROP;
816}
817
818#endif /* _NET_BONDING_H */
819

source code of linux/include/net/bonding.h