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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#include <net/ipv6.h>
33#include <net/addrconf.h>
34
35#define BOND_MAX_ARP_TARGETS 16
36#define BOND_MAX_NS_TARGETS BOND_MAX_ARP_TARGETS
37
38#define BOND_DEFAULT_MIIMON 100
39
40#ifndef __long_aligned
41#define __long_aligned __attribute__((aligned((sizeof(long)))))
42#endif
43
44#define slave_info(bond_dev, slave_dev, fmt, ...) \
45 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
46#define slave_warn(bond_dev, slave_dev, fmt, ...) \
47 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
48#define slave_dbg(bond_dev, slave_dev, fmt, ...) \
49 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
50#define slave_err(bond_dev, slave_dev, fmt, ...) \
51 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
52
53#define BOND_MODE(bond) ((bond)->params.mode)
54
55/* slave list primitives */
56#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
57
58#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
59
60/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
61#define bond_first_slave(bond) \
62 (bond_has_slaves(bond) ? \
63 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
64 NULL)
65#define bond_last_slave(bond) \
66 (bond_has_slaves(bond) ? \
67 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
68 NULL)
69
70/* Caller must have rcu_read_lock */
71#define bond_first_slave_rcu(bond) \
72 netdev_lower_get_first_private_rcu(bond->dev)
73
74#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
75#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
76
77/**
78 * bond_for_each_slave - iterate over all slaves
79 * @bond: the bond holding this list
80 * @pos: current slave
81 * @iter: list_head * iterator
82 *
83 * Caller must hold RTNL
84 */
85#define bond_for_each_slave(bond, pos, iter) \
86 netdev_for_each_lower_private((bond)->dev, pos, iter)
87
88/* Caller must have rcu_read_lock */
89#define bond_for_each_slave_rcu(bond, pos, iter) \
90 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
91
92#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
93 NETIF_F_GSO_ESP)
94
95#define BOND_TLS_FEATURES (NETIF_F_HW_TLS_TX | NETIF_F_HW_TLS_RX)
96
97#ifdef CONFIG_NET_POLL_CONTROLLER
98extern atomic_t netpoll_block_tx;
99
100static inline void block_netpoll_tx(void)
101{
102 atomic_inc(&netpoll_block_tx);
103}
104
105static inline void unblock_netpoll_tx(void)
106{
107 atomic_dec(&netpoll_block_tx);
108}
109
110static inline int is_netpoll_tx_blocked(struct net_device *dev)
111{
112 if (unlikely(netpoll_tx_running(dev)))
113 return atomic_read(&netpoll_block_tx);
114 return 0;
115}
116#else
117#define block_netpoll_tx()
118#define unblock_netpoll_tx()
119#define is_netpoll_tx_blocked(dev) (0)
120#endif
121
122struct bond_params {
123 int mode;
124 int xmit_policy;
125 int miimon;
126 u8 num_peer_notif;
127 u8 missed_max;
128 int arp_interval;
129 int arp_validate;
130 int arp_all_targets;
131 int use_carrier;
132 int fail_over_mac;
133 int updelay;
134 int downdelay;
135 int peer_notif_delay;
136 int lacp_active;
137 int lacp_fast;
138 unsigned int min_links;
139 int ad_select;
140 char primary[IFNAMSIZ];
141 int primary_reselect;
142 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
143 int tx_queues;
144 int all_slaves_active;
145 int resend_igmp;
146 int lp_interval;
147 int packets_per_slave;
148 int tlb_dynamic_lb;
149 struct reciprocal_value reciprocal_packets_per_slave;
150 u16 ad_actor_sys_prio;
151 u16 ad_user_port_key;
152#if IS_ENABLED(CONFIG_IPV6)
153 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
154#endif
155
156 /* 2 bytes of padding : see ether_addr_equal_64bits() */
157 u8 ad_actor_system[ETH_ALEN + 2];
158};
159
160struct slave {
161 struct net_device *dev; /* first - useful for panic debug */
162 struct bonding *bond; /* our master */
163 int delay;
164 /* all 4 in jiffies */
165 unsigned long last_link_up;
166 unsigned long last_tx;
167 unsigned long last_rx;
168 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
169 s8 link; /* one of BOND_LINK_XXXX */
170 s8 link_new_state; /* one of BOND_LINK_XXXX */
171 u8 backup:1, /* indicates backup slave. Value corresponds with
172 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
173 inactive:1, /* indicates inactive slave */
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 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
227 int (*recv_probe)(const struct sk_buff *, struct bonding *,
228 struct slave *);
229 /* mode_lock is used for mode-specific locking needs, currently used by:
230 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
231 * bond_3ad_state_machine_handler() concurrently and also
232 * the access to the state machine shared variables.
233 * TLB mode (5) - to sync the use and modifications of its hash table
234 * ALB mode (6) - to sync the use and modifications of its hash table
235 */
236 spinlock_t mode_lock;
237 spinlock_t stats_lock;
238 u8 send_peer_notif;
239 u8 igmp_retrans;
240#ifdef CONFIG_PROC_FS
241 struct proc_dir_entry *proc_entry;
242 char proc_file_name[IFNAMSIZ];
243#endif /* CONFIG_PROC_FS */
244 struct list_head bond_list;
245 u32 __percpu *rr_tx_counter;
246 struct ad_bond_info ad_info;
247 struct alb_bond_info alb_info;
248 struct bond_params params;
249 struct workqueue_struct *wq;
250 struct delayed_work mii_work;
251 struct delayed_work arp_work;
252 struct delayed_work alb_work;
253 struct delayed_work ad_work;
254 struct delayed_work mcast_work;
255 struct delayed_work slave_arr_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 spinlock_t 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
283bool bond_sk_check(struct bonding *bond);
284
285/**
286 * Returns NULL if the net_device does not belong to any of the bond's slaves
287 *
288 * Caller must hold bond lock for read
289 */
290static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
291 struct net_device *slave_dev)
292{
293 return netdev_lower_dev_get_private(bond->dev, slave_dev);
294}
295
296static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
297{
298 return slave->bond;
299}
300
301static inline bool bond_should_override_tx_queue(struct bonding *bond)
302{
303 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
304 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
305}
306
307static inline bool bond_is_lb(const struct bonding *bond)
308{
309 return BOND_MODE(bond) == BOND_MODE_TLB ||
310 BOND_MODE(bond) == BOND_MODE_ALB;
311}
312
313static inline bool bond_needs_speed_duplex(const struct bonding *bond)
314{
315 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
316}
317
318static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
319{
320 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
321}
322
323static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
324{
325 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
326 BOND_MODE(bond) == BOND_MODE_XOR ||
327 BOND_MODE(bond) == BOND_MODE_TLB ||
328 BOND_MODE(bond) == BOND_MODE_ALB);
329}
330
331static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
332{
333 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
334 BOND_MODE(bond) == BOND_MODE_XOR ||
335 bond_is_nondyn_tlb(bond));
336}
337
338static inline bool bond_mode_uses_arp(int mode)
339{
340 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
341 mode != BOND_MODE_ALB;
342}
343
344static inline bool bond_mode_uses_primary(int mode)
345{
346 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
347 mode == BOND_MODE_ALB;
348}
349
350static inline bool bond_uses_primary(struct bonding *bond)
351{
352 return bond_mode_uses_primary(BOND_MODE(bond));
353}
354
355static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
356{
357 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
358
359 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
360}
361
362static inline bool bond_slave_is_up(struct slave *slave)
363{
364 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
365}
366
367static inline void bond_set_active_slave(struct slave *slave)
368{
369 if (slave->backup) {
370 slave->backup = 0;
371 bond_queue_slave_event(slave);
372 bond_lower_state_changed(slave);
373 }
374}
375
376static inline void bond_set_backup_slave(struct slave *slave)
377{
378 if (!slave->backup) {
379 slave->backup = 1;
380 bond_queue_slave_event(slave);
381 bond_lower_state_changed(slave);
382 }
383}
384
385static inline void bond_set_slave_state(struct slave *slave,
386 int slave_state, bool notify)
387{
388 if (slave->backup == slave_state)
389 return;
390
391 slave->backup = slave_state;
392 if (notify) {
393 bond_lower_state_changed(slave);
394 bond_queue_slave_event(slave);
395 slave->should_notify = 0;
396 } else {
397 if (slave->should_notify)
398 slave->should_notify = 0;
399 else
400 slave->should_notify = 1;
401 }
402}
403
404static inline void bond_slave_state_change(struct bonding *bond)
405{
406 struct list_head *iter;
407 struct slave *tmp;
408
409 bond_for_each_slave(bond, tmp, iter) {
410 if (tmp->link == BOND_LINK_UP)
411 bond_set_active_slave(tmp);
412 else if (tmp->link == BOND_LINK_DOWN)
413 bond_set_backup_slave(tmp);
414 }
415}
416
417static inline void bond_slave_state_notify(struct bonding *bond)
418{
419 struct list_head *iter;
420 struct slave *tmp;
421
422 bond_for_each_slave(bond, tmp, iter) {
423 if (tmp->should_notify) {
424 bond_lower_state_changed(tmp);
425 tmp->should_notify = 0;
426 }
427 }
428}
429
430static inline int bond_slave_state(struct slave *slave)
431{
432 return slave->backup;
433}
434
435static inline bool bond_is_active_slave(struct slave *slave)
436{
437 return !bond_slave_state(slave);
438}
439
440static inline bool bond_slave_can_tx(struct slave *slave)
441{
442 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
443 bond_is_active_slave(slave);
444}
445
446static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
447{
448 struct slave *slave;
449 bool active;
450
451 rcu_read_lock();
452 slave = bond_slave_get_rcu(slave_dev);
453 active = bond_is_active_slave(slave);
454 rcu_read_unlock();
455
456 return active;
457}
458
459static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
460{
461 if (len == ETH_ALEN) {
462 ether_addr_copy(dst, src);
463 return;
464 }
465
466 memcpy(dst, src, len);
467}
468
469#define BOND_PRI_RESELECT_ALWAYS 0
470#define BOND_PRI_RESELECT_BETTER 1
471#define BOND_PRI_RESELECT_FAILURE 2
472
473#define BOND_FOM_NONE 0
474#define BOND_FOM_ACTIVE 1
475#define BOND_FOM_FOLLOW 2
476
477#define BOND_ARP_TARGETS_ANY 0
478#define BOND_ARP_TARGETS_ALL 1
479
480#define BOND_ARP_VALIDATE_NONE 0
481#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
482#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
483#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
484 BOND_ARP_VALIDATE_BACKUP)
485#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
486#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
487 BOND_ARP_FILTER)
488#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
489 BOND_ARP_FILTER)
490
491#define BOND_SLAVE_NOTIFY_NOW true
492#define BOND_SLAVE_NOTIFY_LATER false
493
494static inline int slave_do_arp_validate(struct bonding *bond,
495 struct slave *slave)
496{
497 return bond->params.arp_validate & (1 << bond_slave_state(slave));
498}
499
500static inline int slave_do_arp_validate_only(struct bonding *bond)
501{
502 return bond->params.arp_validate & BOND_ARP_FILTER;
503}
504
505static inline int bond_is_ip_target_ok(__be32 addr)
506{
507 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
508}
509
510#if IS_ENABLED(CONFIG_IPV6)
511static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
512{
513 return !ipv6_addr_any(addr) &&
514 !ipv6_addr_loopback(addr) &&
515 !ipv6_addr_is_multicast(addr);
516}
517#endif
518
519/* Get the oldest arp which we've received on this slave for bond's
520 * arp_targets.
521 */
522static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
523 struct slave *slave)
524{
525 int i = 1;
526 unsigned long ret = slave->target_last_arp_rx[0];
527
528 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
529 if (time_before(slave->target_last_arp_rx[i], ret))
530 ret = slave->target_last_arp_rx[i];
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 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}
577
578static inline void bond_set_slave_active_flags(struct slave *slave,
579 bool notify)
580{
581 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
582 slave->inactive = 0;
583}
584
585static inline bool bond_is_slave_inactive(struct slave *slave)
586{
587 return slave->inactive;
588}
589
590static inline void bond_propose_link_state(struct slave *slave, int state)
591{
592 slave->link_new_state = state;
593}
594
595static inline void bond_commit_link_state(struct slave *slave, bool notify)
596{
597 if (slave->link_new_state == BOND_LINK_NOCHANGE)
598 return;
599
600 slave->link = slave->link_new_state;
601 if (notify) {
602 bond_queue_slave_event(slave);
603 bond_lower_state_changed(slave);
604 slave->should_notify_link = 0;
605 } else {
606 if (slave->should_notify_link)
607 slave->should_notify_link = 0;
608 else
609 slave->should_notify_link = 1;
610 }
611}
612
613static inline void bond_set_slave_link_state(struct slave *slave, int state,
614 bool notify)
615{
616 bond_propose_link_state(slave, state);
617 bond_commit_link_state(slave, notify);
618}
619
620static inline void bond_slave_link_notify(struct bonding *bond)
621{
622 struct list_head *iter;
623 struct slave *tmp;
624
625 bond_for_each_slave(bond, tmp, iter) {
626 if (tmp->should_notify_link) {
627 bond_queue_slave_event(tmp);
628 bond_lower_state_changed(tmp);
629 tmp->should_notify_link = 0;
630 }
631 }
632}
633
634static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
635{
636 struct in_device *in_dev;
637 __be32 addr = 0;
638
639 rcu_read_lock();
640 in_dev = __in_dev_get_rcu(dev);
641
642 if (in_dev)
643 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
644 RT_SCOPE_HOST);
645 rcu_read_unlock();
646 return addr;
647}
648
649struct bond_net {
650 struct net *net; /* Associated network namespace */
651 struct list_head dev_list;
652#ifdef CONFIG_PROC_FS
653 struct proc_dir_entry *proc_dir;
654#endif
655 struct class_attribute class_attr_bonding_masters;
656};
657
658int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
659netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
660int bond_create(struct net *net, const char *name);
661int bond_create_sysfs(struct bond_net *net);
662void bond_destroy_sysfs(struct bond_net *net);
663void bond_prepare_sysfs_group(struct bonding *bond);
664int bond_sysfs_slave_add(struct slave *slave);
665void bond_sysfs_slave_del(struct slave *slave);
666int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
667 struct netlink_ext_ack *extack);
668int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
669u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
670int bond_set_carrier(struct bonding *bond);
671void bond_select_active_slave(struct bonding *bond);
672void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
673void bond_create_debugfs(void);
674void bond_destroy_debugfs(void);
675void bond_debug_register(struct bonding *bond);
676void bond_debug_unregister(struct bonding *bond);
677void bond_debug_reregister(struct bonding *bond);
678const char *bond_mode_name(int mode);
679void bond_setup(struct net_device *bond_dev);
680unsigned int bond_get_num_tx_queues(void);
681int bond_netlink_init(void);
682void bond_netlink_fini(void);
683struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
684const char *bond_slave_link_status(s8 link);
685struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
686 struct net_device *end_dev,
687 int level);
688int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
689void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
690void bond_work_init_all(struct bonding *bond);
691
692#ifdef CONFIG_PROC_FS
693void bond_create_proc_entry(struct bonding *bond);
694void bond_remove_proc_entry(struct bonding *bond);
695void bond_create_proc_dir(struct bond_net *bn);
696void bond_destroy_proc_dir(struct bond_net *bn);
697#else
698static inline void bond_create_proc_entry(struct bonding *bond)
699{
700}
701
702static inline void bond_remove_proc_entry(struct bonding *bond)
703{
704}
705
706static inline void bond_create_proc_dir(struct bond_net *bn)
707{
708}
709
710static inline void bond_destroy_proc_dir(struct bond_net *bn)
711{
712}
713#endif
714
715static inline struct slave *bond_slave_has_mac(struct bonding *bond,
716 const u8 *mac)
717{
718 struct list_head *iter;
719 struct slave *tmp;
720
721 bond_for_each_slave(bond, tmp, iter)
722 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
723 return tmp;
724
725 return NULL;
726}
727
728/* Caller must hold rcu_read_lock() for read */
729static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
730{
731 struct list_head *iter;
732 struct slave *tmp;
733 struct netdev_hw_addr *ha;
734
735 bond_for_each_slave_rcu(bond, tmp, iter)
736 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
737 return true;
738
739 if (netdev_uc_empty(bond->dev))
740 return false;
741
742 netdev_for_each_uc_addr(ha, bond->dev)
743 if (ether_addr_equal_64bits(mac, ha->addr))
744 return true;
745
746 return false;
747}
748
749/* Check if the ip is present in arp ip list, or first free slot if ip == 0
750 * Returns -1 if not found, index if found
751 */
752static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
753{
754 int i;
755
756 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
757 if (targets[i] == ip)
758 return i;
759 else if (targets[i] == 0)
760 break;
761
762 return -1;
763}
764
765#if IS_ENABLED(CONFIG_IPV6)
766static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
767{
768 int i;
769
770 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
771 if (ipv6_addr_equal(&targets[i], ip))
772 return i;
773 else if (ipv6_addr_any(&targets[i]))
774 break;
775
776 return -1;
777}
778#endif
779
780/* exported from bond_main.c */
781extern unsigned int bond_net_id;
782
783/* exported from bond_netlink.c */
784extern struct rtnl_link_ops bond_link_ops;
785
786/* exported from bond_sysfs_slave.c */
787extern const struct sysfs_ops slave_sysfs_ops;
788
789/* exported from bond_3ad.c */
790extern const u8 lacpdu_mcast_addr[];
791
792static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
793{
794 dev_core_stats_tx_dropped_inc(dev);
795 dev_kfree_skb_any(skb);
796 return NET_XMIT_DROP;
797}
798
799#endif /* _NET_BONDING_H */