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
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(bond->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(slave->dev) && netif_carrier_ok(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(tmp);
411		else if (tmp->link == BOND_LINK_DOWN)
412			bond_set_backup_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(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(addr) &&
513	       !ipv6_addr_loopback(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(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(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(tmp);
649			bond_lower_state_changed(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(dev_net(dev), in_dev, dst, local,
665					 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(int mode, int xmit_policy);
702bool bond_xdp_check(struct bonding *bond, int mode);
703void bond_setup(struct net_device *bond_dev);
704unsigned int bond_get_num_tx_queues(void);
705int bond_netlink_init(void);
706void bond_netlink_fini(void);
707struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
708const char *bond_slave_link_status(s8 link);
709struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
710					      struct net_device *end_dev,
711					      int level);
712int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
713void bond_slave_arr_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 */