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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, [email protected]
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/**
73 * bond_for_each_slave - iterate over all slaves
74 * @bond: the bond holding this list
75 * @pos: current slave
76 * @iter: list_head * iterator
77 *
78 * Caller must hold RTNL
79 */
80#define bond_for_each_slave(bond, pos, iter) \
81 netdev_for_each_lower_private((bond)->dev, pos, iter)
82
83/* Caller must have rcu_read_lock */
84#define bond_for_each_slave_rcu(bond, pos, iter) \
85 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
86
87#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
88 NETIF_F_GSO_ESP)
89
90#ifdef CONFIG_NET_POLL_CONTROLLER
91DECLARE_STATIC_KEY_FALSE(netpoll_block_tx);
92
93static inline void block_netpoll_tx(void)
94{
95 static_branch_inc(&netpoll_block_tx);
96}
97
98static inline void unblock_netpoll_tx(void)
99{
100 static_branch_dec(&netpoll_block_tx);
101}
102
103static inline int is_netpoll_tx_blocked(struct net_device *dev)
104{
105 if (static_branch_unlikely(&netpoll_block_tx))
106 return netpoll_tx_running(dev);
107 return 0;
108}
109#else
110#define block_netpoll_tx()
111#define unblock_netpoll_tx()
112#define is_netpoll_tx_blocked(dev) (0)
113#endif
114
115DECLARE_STATIC_KEY_FALSE(bond_bcast_neigh_enabled);
116
117struct bond_params {
118 int mode;
119 int xmit_policy;
120 int miimon;
121 u8 num_peer_notif;
122 u8 missed_max;
123 int arp_interval;
124 int arp_validate;
125 int arp_all_targets;
126 int fail_over_mac;
127 int updelay;
128 int downdelay;
129 int peer_notif_delay;
130 int lacp_active;
131 int lacp_fast;
132 int lacp_strict;
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#if IS_ENABLED(CONFIG_IPV6)
148 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
149#endif
150 int coupled_control;
151 int broadcast_neighbor;
152
153 /* 2 bytes of padding : see ether_addr_equal_64bits() */
154 u8 ad_actor_system[ETH_ALEN + 2];
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 4 in jiffies */
162 unsigned long last_link_up;
163 unsigned long last_tx;
164 unsigned long last_rx;
165 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
166 s8 link; /* one of BOND_LINK_XXXX */
167 s8 link_new_state; /* one of BOND_LINK_XXXX */
168 u8 backup:1, /* indicates backup slave. Value corresponds with
169 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
170 inactive:1, /* indicates inactive slave */
171 rx_disabled:1, /* indicates whether slave's Rx is disabled */
172 should_notify:1, /* indicates whether the state changed */
173 should_notify_link:1; /* indicates whether the link changed */
174 u8 duplex;
175 u32 original_mtu;
176 u32 link_failure_count;
177 u32 speed;
178 u16 queue_id;
179 u8 perm_hwaddr[MAX_ADDR_LEN];
180 int prio;
181 struct ad_slave_info *ad_info;
182 struct tlb_slave_info tlb_info;
183#ifdef CONFIG_NET_POLL_CONTROLLER
184 struct netpoll *np;
185#endif
186 struct delayed_work notify_work;
187 struct kobject kobj;
188 struct rtnl_link_stats64 slave_stats;
189};
190
191static inline struct slave *to_slave(struct kobject *kobj)
192{
193 return container_of(kobj, struct slave, kobj);
194}
195
196struct bond_up_slave {
197 unsigned int count;
198 struct rcu_head rcu;
199 struct slave *arr[];
200};
201
202/*
203 * Link pseudo-state only used internally by monitors
204 */
205#define BOND_LINK_NOCHANGE -1
206
207struct bond_ipsec {
208 struct list_head list;
209 struct xfrm_state *xs;
210};
211
212/*
213 * Here are the locking policies for the two bonding locks:
214 * Get rcu_read_lock when reading or RTNL when writing slave list.
215 */
216struct bonding {
217 struct net_device *dev; /* first - useful for panic debug */
218 struct slave __rcu *curr_active_slave;
219 struct slave __rcu *current_arp_slave;
220 struct slave __rcu *primary_slave;
221 struct bond_up_slave __rcu *usable_slaves;
222 struct bond_up_slave __rcu *all_slaves;
223 bool force_primary;
224 bool notifier_ctx;
225 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
226 int (*recv_probe)(const struct sk_buff *, struct bonding *,
227 struct slave *);
228 /* mode_lock is used for mode-specific locking needs, currently used by:
229 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
230 * bond_3ad_state_machine_handler() concurrently and also
231 * the access to the state machine shared variables.
232 * TLB mode (5) - to sync the use and modifications of its hash table
233 * ALB mode (6) - to sync the use and modifications of its hash table
234 */
235 spinlock_t mode_lock;
236 spinlock_t stats_lock;
237 u32 send_peer_notif;
238 u8 igmp_retrans;
239#ifdef CONFIG_PROC_FS
240 struct proc_dir_entry *proc_entry;
241 char proc_file_name[IFNAMSIZ];
242#endif /* CONFIG_PROC_FS */
243 struct list_head bond_list;
244 u32 __percpu *rr_tx_counter;
245 struct ad_bond_info ad_info;
246 struct alb_bond_info alb_info;
247 struct bond_params params;
248 struct workqueue_struct *wq;
249 struct delayed_work mii_work;
250 struct delayed_work arp_work;
251 struct delayed_work alb_work;
252 struct delayed_work ad_work;
253 struct delayed_work mcast_work;
254 struct delayed_work slave_arr_work;
255 struct delayed_work peer_notify_work;
256#ifdef CONFIG_DEBUG_FS
257 /* debugging support via debugfs */
258 struct dentry *debug_dir;
259#endif /* CONFIG_DEBUG_FS */
260 struct rtnl_link_stats64 bond_stats;
261#ifdef CONFIG_XFRM_OFFLOAD
262 struct list_head ipsec_list;
263 /* protecting ipsec_list */
264 struct mutex ipsec_lock;
265#endif /* CONFIG_XFRM_OFFLOAD */
266 struct bpf_prog *xdp_prog;
267};
268
269#define bond_slave_get_rcu(dev) \
270 ((struct slave *) rcu_dereference(dev->rx_handler_data))
271
272#define bond_slave_get_rtnl(dev) \
273 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
274
275void bond_queue_slave_event(struct slave *slave);
276void bond_lower_state_changed(struct slave *slave);
277
278struct bond_vlan_tag {
279 __be16 vlan_proto;
280 unsigned short vlan_id;
281};
282
283/*
284 * Returns NULL if the net_device does not belong to any of the bond's slaves
285 *
286 * Caller must hold bond lock for read
287 */
288static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
289 struct net_device *slave_dev)
290{
291 return netdev_lower_dev_get_private(bond->dev, slave_dev);
292}
293
294static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
295{
296 return slave->bond;
297}
298
299static inline bool bond_should_override_tx_queue(struct bonding *bond)
300{
301 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
302 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
303}
304
305static inline bool bond_is_lb(const struct bonding *bond)
306{
307 return BOND_MODE(bond) == BOND_MODE_TLB ||
308 BOND_MODE(bond) == BOND_MODE_ALB;
309}
310
311static inline bool bond_needs_speed_duplex(const struct bonding *bond)
312{
313 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
314}
315
316static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
317{
318 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
319}
320
321static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
322{
323 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
324 BOND_MODE(bond) == BOND_MODE_XOR ||
325 BOND_MODE(bond) == BOND_MODE_TLB ||
326 BOND_MODE(bond) == BOND_MODE_ALB);
327}
328
329static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
330{
331 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
332 BOND_MODE(bond) == BOND_MODE_XOR ||
333 bond_is_nondyn_tlb(bond));
334}
335
336static inline bool bond_mode_uses_arp(int mode)
337{
338 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
339 mode != BOND_MODE_ALB;
340}
341
342static inline bool bond_mode_uses_primary(int mode)
343{
344 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
345 mode == BOND_MODE_ALB;
346}
347
348static inline bool bond_uses_primary(const struct bonding *bond)
349{
350 return bond_mode_uses_primary(BOND_MODE(bond));
351}
352
353static inline struct net_device *bond_option_active_slave_get_rcu(const struct bonding *bond)
354{
355 const struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
356
357 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
358}
359
360static inline bool bond_slave_is_up(struct slave *slave)
361{
362 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
363}
364
365static inline void bond_set_active_slave(struct slave *slave)
366{
367 if (slave->backup) {
368 slave->backup = 0;
369 bond_queue_slave_event(slave);
370 bond_lower_state_changed(slave);
371 }
372}
373
374static inline void bond_set_backup_slave(struct slave *slave)
375{
376 if (!slave->backup) {
377 slave->backup = 1;
378 bond_queue_slave_event(slave);
379 bond_lower_state_changed(slave);
380 }
381}
382
383static inline void bond_set_slave_state(struct slave *slave,
384 int slave_state, bool notify)
385{
386 if (slave->backup == slave_state)
387 return;
388
389 slave->backup = slave_state;
390 if (notify) {
391 bond_lower_state_changed(slave);
392 bond_queue_slave_event(slave);
393 slave->should_notify = 0;
394 } else {
395 if (slave->should_notify)
396 slave->should_notify = 0;
397 else
398 slave->should_notify = 1;
399 }
400}
401
402static inline void bond_slave_state_change(struct bonding *bond)
403{
404 struct list_head *iter;
405 struct slave *tmp;
406
407 bond_for_each_slave(bond, tmp, iter) {
408 if (tmp->link == BOND_LINK_UP)
409 bond_set_active_slave(tmp);
410 else if (tmp->link == BOND_LINK_DOWN)
411 bond_set_backup_slave(tmp);
412 }
413}
414
415static inline void bond_slave_state_notify(struct bonding *bond)
416{
417 struct list_head *iter;
418 struct slave *tmp;
419
420 bond_for_each_slave(bond, tmp, iter) {
421 if (tmp->should_notify) {
422 bond_lower_state_changed(tmp);
423 tmp->should_notify = 0;
424 }
425 }
426}
427
428static inline int bond_slave_state(struct slave *slave)
429{
430 return slave->backup;
431}
432
433static inline bool bond_is_active_slave(struct slave *slave)
434{
435 return !bond_slave_state(slave);
436}
437
438static inline bool bond_slave_can_tx(struct slave *slave)
439{
440 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
441 bond_is_active_slave(slave);
442}
443
444static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
445{
446 struct slave *slave;
447 bool active;
448
449 rcu_read_lock();
450 slave = bond_slave_get_rcu(slave_dev);
451 active = bond_is_active_slave(slave);
452 rcu_read_unlock();
453
454 return active;
455}
456
457static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
458{
459 if (len == ETH_ALEN) {
460 ether_addr_copy(dst, src);
461 return;
462 }
463
464 memcpy(dst, src, len);
465}
466
467#define BOND_PRI_RESELECT_ALWAYS 0
468#define BOND_PRI_RESELECT_BETTER 1
469#define BOND_PRI_RESELECT_FAILURE 2
470
471#define BOND_FOM_NONE 0
472#define BOND_FOM_ACTIVE 1
473#define BOND_FOM_FOLLOW 2
474
475#define BOND_ARP_TARGETS_ANY 0
476#define BOND_ARP_TARGETS_ALL 1
477
478#define BOND_ARP_VALIDATE_NONE 0
479#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
480#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
481#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
482 BOND_ARP_VALIDATE_BACKUP)
483#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
484#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
485 BOND_ARP_FILTER)
486#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
487 BOND_ARP_FILTER)
488
489#define BOND_SLAVE_NOTIFY_NOW true
490#define BOND_SLAVE_NOTIFY_LATER false
491
492static inline int slave_do_arp_validate(struct bonding *bond,
493 struct slave *slave)
494{
495 return bond->params.arp_validate & (1 << bond_slave_state(slave));
496}
497
498static inline int slave_do_arp_validate_only(struct bonding *bond)
499{
500 return bond->params.arp_validate & BOND_ARP_FILTER;
501}
502
503static inline int bond_is_ip_target_ok(__be32 addr)
504{
505 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
506}
507
508#if IS_ENABLED(CONFIG_IPV6)
509static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
510{
511 return !ipv6_addr_any(addr) &&
512 !ipv6_addr_loopback(addr) &&
513 !ipv6_addr_is_multicast(addr);
514}
515#endif
516
517/* Get the oldest arp which we've received on this slave for bond's
518 * arp_targets.
519 */
520static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
521 struct slave *slave)
522{
523 unsigned long tmp, ret = READ_ONCE(slave->target_last_arp_rx[0]);
524 int i = 1;
525
526 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) {
527 tmp = READ_ONCE(slave->target_last_arp_rx[i]);
528 if (time_before(tmp, ret))
529 ret = tmp;
530 }
531 return ret;
532}
533
534static inline unsigned long slave_last_rx(struct bonding *bond,
535 struct slave *slave)
536{
537 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
538 return slave_oldest_target_arp_rx(bond, slave);
539
540 return READ_ONCE(slave->last_rx);
541}
542
543static inline void slave_update_last_tx(struct slave *slave)
544{
545 WRITE_ONCE(slave->last_tx, jiffies);
546}
547
548static inline unsigned long slave_last_tx(struct slave *slave)
549{
550 return READ_ONCE(slave->last_tx);
551}
552
553#ifdef CONFIG_NET_POLL_CONTROLLER
554static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
555 struct sk_buff *skb)
556{
557 return netpoll_send_skb(slave->np, skb);
558}
559#else
560static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
561 struct sk_buff *skb)
562{
563 BUG();
564 return NETDEV_TX_OK;
565}
566#endif
567
568static inline void bond_set_slave_inactive_flags(struct slave *slave,
569 bool notify)
570{
571 if (!bond_is_lb(slave->bond))
572 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
573 if (!slave->bond->params.all_slaves_active)
574 slave->inactive = 1;
575 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
576 slave->rx_disabled = 1;
577}
578
579static inline void bond_set_slave_tx_disabled_flags(struct slave *slave,
580 bool notify)
581{
582 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
583}
584
585static inline void bond_set_slave_active_flags(struct slave *slave,
586 bool notify)
587{
588 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
589 slave->inactive = 0;
590 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
591 slave->rx_disabled = 0;
592}
593
594static inline void bond_set_slave_rx_enabled_flags(struct slave *slave,
595 bool notify)
596{
597 slave->rx_disabled = 0;
598}
599
600static inline bool bond_is_slave_inactive(struct slave *slave)
601{
602 return slave->inactive;
603}
604
605static inline bool bond_is_slave_rx_disabled(struct slave *slave)
606{
607 return slave->rx_disabled;
608}
609
610static inline void bond_propose_link_state(struct slave *slave, int state)
611{
612 slave->link_new_state = state;
613}
614
615static inline void bond_commit_link_state(struct slave *slave, bool notify)
616{
617 if (slave->link_new_state == BOND_LINK_NOCHANGE)
618 return;
619
620 slave->link = slave->link_new_state;
621 if (notify) {
622 bond_queue_slave_event(slave);
623 bond_lower_state_changed(slave);
624 slave->should_notify_link = 0;
625 } else {
626 if (slave->should_notify_link)
627 slave->should_notify_link = 0;
628 else
629 slave->should_notify_link = 1;
630 }
631}
632
633static inline void bond_set_slave_link_state(struct slave *slave, int state,
634 bool notify)
635{
636 bond_propose_link_state(slave, state);
637 bond_commit_link_state(slave, notify);
638}
639
640static inline void bond_slave_link_notify(struct bonding *bond)
641{
642 struct list_head *iter;
643 struct slave *tmp;
644
645 bond_for_each_slave(bond, tmp, iter) {
646 if (tmp->should_notify_link) {
647 bond_queue_slave_event(tmp);
648 bond_lower_state_changed(tmp);
649 tmp->should_notify_link = 0;
650 }
651 }
652}
653
654static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
655{
656 struct in_device *in_dev;
657 __be32 addr = 0;
658
659 rcu_read_lock();
660 in_dev = __in_dev_get_rcu(dev);
661
662 if (in_dev)
663 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
664 RT_SCOPE_HOST);
665 rcu_read_unlock();
666 return addr;
667}
668
669struct bond_net {
670 struct net *net; /* Associated network namespace */
671 struct list_head dev_list;
672#ifdef CONFIG_PROC_FS
673 struct proc_dir_entry *proc_dir;
674#endif
675 struct class_attribute class_attr_bonding_masters;
676};
677
678int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
679netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
680int bond_create(struct net *net, const char *name);
681int bond_create_sysfs(struct bond_net *net);
682void bond_destroy_sysfs(struct bond_net *net);
683void bond_prepare_sysfs_group(struct bonding *bond);
684int bond_sysfs_slave_add(struct slave *slave);
685void bond_sysfs_slave_del(struct slave *slave);
686void bond_xdp_set_features(struct net_device *bond_dev);
687int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
688 struct netlink_ext_ack *extack);
689int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
690u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
691int bond_set_carrier(struct bonding *bond);
692void bond_select_active_slave(struct bonding *bond);
693void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
694void bond_create_debugfs(void);
695void bond_destroy_debugfs(void);
696void bond_debug_register(struct bonding *bond);
697void bond_debug_unregister(struct bonding *bond);
698void bond_debug_reregister(struct bonding *bond);
699const char *bond_mode_name(int mode);
700bool __bond_xdp_check(int mode, int xmit_policy);
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(const 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_peer_notify_work_rearm(struct bonding *bond, unsigned long delay);
714void bond_work_init_all(struct bonding *bond);
715void bond_work_cancel_all(struct bonding *bond);
716
717#ifdef CONFIG_PROC_FS
718void bond_create_proc_entry(struct bonding *bond);
719void bond_remove_proc_entry(struct bonding *bond);
720void bond_create_proc_dir(struct bond_net *bn);
721void bond_destroy_proc_dir(struct bond_net *bn);
722#else
723static inline void bond_create_proc_entry(struct bonding *bond)
724{
725}
726
727static inline void bond_remove_proc_entry(struct bonding *bond)
728{
729}
730
731static inline void bond_create_proc_dir(struct bond_net *bn)
732{
733}
734
735static inline void bond_destroy_proc_dir(struct bond_net *bn)
736{
737}
738#endif
739
740static inline struct slave *bond_slave_has_mac(struct bonding *bond,
741 const u8 *mac)
742{
743 struct list_head *iter;
744 struct slave *tmp;
745
746 bond_for_each_slave(bond, tmp, iter)
747 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
748 return tmp;
749
750 return NULL;
751}
752
753/* Caller must hold rcu_read_lock() for read */
754static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac)
755{
756 struct list_head *iter;
757 struct slave *tmp;
758
759 bond_for_each_slave_rcu(bond, tmp, iter)
760 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
761 return true;
762 return false;
763}
764
765/* Check if the ip is present in arp ip list, or first free slot if ip == 0
766 * Returns -1 if not found, index if found
767 */
768static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
769{
770 int i;
771
772 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
773 if (targets[i] == ip)
774 return i;
775 else if (targets[i] == 0)
776 break;
777
778 return -1;
779}
780
781#if IS_ENABLED(CONFIG_IPV6)
782static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
783{
784 struct in6_addr mcaddr;
785 int i;
786
787 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
788 addrconf_addr_solict_mult(&targets[i], &mcaddr);
789 if ((ipv6_addr_equal(&targets[i], ip)) ||
790 (ipv6_addr_equal(&mcaddr, ip)))
791 return i;
792 else if (ipv6_addr_any(&targets[i]))
793 break;
794 }
795
796 return -1;
797}
798#endif
799
800/* exported from bond_main.c */
801extern unsigned int bond_net_id;
802
803/* exported from bond_netlink.c */
804extern struct rtnl_link_ops bond_link_ops;
805
806/* exported from bond_sysfs_slave.c */
807extern const struct sysfs_ops slave_sysfs_ops;
808
809/* exported from bond_3ad.c */
810extern const u8 lacpdu_mcast_addr[];
811
812static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
813{
814 dev_core_stats_tx_dropped_inc(dev);
815 dev_kfree_skb_any(skb);
816 return NET_XMIT_DROP;
817}
818
819#endif /* _NET_BONDING_H */