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