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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, 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
118struct bond_params {
119 int mode;
120 int xmit_policy;
121 int miimon;
122 u8 num_peer_notif;
123 u8 missed_max;
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_active;
133 int lacp_fast;
134 unsigned int min_links;
135 int ad_select;
136 char primary[IFNAMSIZ];
137 int primary_reselect;
138 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
139 int tx_queues;
140 int all_slaves_active;
141 int resend_igmp;
142 int lp_interval;
143 int packets_per_slave;
144 int tlb_dynamic_lb;
145 struct reciprocal_value reciprocal_packets_per_slave;
146 u16 ad_actor_sys_prio;
147 u16 ad_user_port_key;
148#if IS_ENABLED(CONFIG_IPV6)
149 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
150#endif
151 int coupled_control;
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#ifdef CONFIG_DEBUG_FS
256 /* debugging support via debugfs */
257 struct dentry *debug_dir;
258#endif /* CONFIG_DEBUG_FS */
259 struct rtnl_link_stats64 bond_stats;
260#ifdef CONFIG_XFRM_OFFLOAD
261 struct list_head ipsec_list;
262 /* protecting ipsec_list */
263 struct mutex ipsec_lock;
264#endif /* CONFIG_XFRM_OFFLOAD */
265 struct bpf_prog *xdp_prog;
266};
267
268#define bond_slave_get_rcu(dev) \
269 ((struct slave *) rcu_dereference(dev->rx_handler_data))
270
271#define bond_slave_get_rtnl(dev) \
272 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
273
274void bond_queue_slave_event(struct slave *slave);
275void bond_lower_state_changed(struct slave *slave);
276
277struct bond_vlan_tag {
278 __be16 vlan_proto;
279 unsigned short vlan_id;
280};
281
282/*
283 * Returns NULL if the net_device does not belong to any of the bond's slaves
284 *
285 * Caller must hold bond lock for read
286 */
287static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
288 struct net_device *slave_dev)
289{
290 return netdev_lower_dev_get_private(bond->dev, slave_dev);
291}
292
293static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
294{
295 return slave->bond;
296}
297
298static inline bool bond_should_override_tx_queue(struct bonding *bond)
299{
300 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
301 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
302}
303
304static inline bool bond_is_lb(const struct bonding *bond)
305{
306 return BOND_MODE(bond) == BOND_MODE_TLB ||
307 BOND_MODE(bond) == BOND_MODE_ALB;
308}
309
310static inline bool bond_needs_speed_duplex(const struct bonding *bond)
311{
312 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
313}
314
315static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
316{
317 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
318}
319
320static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
321{
322 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
323 BOND_MODE(bond) == BOND_MODE_XOR ||
324 BOND_MODE(bond) == BOND_MODE_TLB ||
325 BOND_MODE(bond) == BOND_MODE_ALB);
326}
327
328static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
329{
330 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
331 BOND_MODE(bond) == BOND_MODE_XOR ||
332 bond_is_nondyn_tlb(bond));
333}
334
335static inline bool bond_mode_uses_arp(int mode)
336{
337 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
338 mode != BOND_MODE_ALB;
339}
340
341static inline bool bond_mode_uses_primary(int mode)
342{
343 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
344 mode == BOND_MODE_ALB;
345}
346
347static inline bool bond_uses_primary(struct bonding *bond)
348{
349 return bond_mode_uses_primary(BOND_MODE(bond));
350}
351
352static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
353{
354 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
355
356 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
357}
358
359static inline bool bond_slave_is_up(struct slave *slave)
360{
361 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
362}
363
364static inline void bond_set_active_slave(struct slave *slave)
365{
366 if (slave->backup) {
367 slave->backup = 0;
368 bond_queue_slave_event(slave);
369 bond_lower_state_changed(slave);
370 }
371}
372
373static inline void bond_set_backup_slave(struct slave *slave)
374{
375 if (!slave->backup) {
376 slave->backup = 1;
377 bond_queue_slave_event(slave);
378 bond_lower_state_changed(slave);
379 }
380}
381
382static inline void bond_set_slave_state(struct slave *slave,
383 int slave_state, bool notify)
384{
385 if (slave->backup == slave_state)
386 return;
387
388 slave->backup = slave_state;
389 if (notify) {
390 bond_lower_state_changed(slave);
391 bond_queue_slave_event(slave);
392 slave->should_notify = 0;
393 } else {
394 if (slave->should_notify)
395 slave->should_notify = 0;
396 else
397 slave->should_notify = 1;
398 }
399}
400
401static inline void bond_slave_state_change(struct bonding *bond)
402{
403 struct list_head *iter;
404 struct slave *tmp;
405
406 bond_for_each_slave(bond, tmp, iter) {
407 if (tmp->link == BOND_LINK_UP)
408 bond_set_active_slave(tmp);
409 else if (tmp->link == BOND_LINK_DOWN)
410 bond_set_backup_slave(tmp);
411 }
412}
413
414static inline void bond_slave_state_notify(struct bonding *bond)
415{
416 struct list_head *iter;
417 struct slave *tmp;
418
419 bond_for_each_slave(bond, tmp, iter) {
420 if (tmp->should_notify) {
421 bond_lower_state_changed(tmp);
422 tmp->should_notify = 0;
423 }
424 }
425}
426
427static inline int bond_slave_state(struct slave *slave)
428{
429 return slave->backup;
430}
431
432static inline bool bond_is_active_slave(struct slave *slave)
433{
434 return !bond_slave_state(slave);
435}
436
437static inline bool bond_slave_can_tx(struct slave *slave)
438{
439 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
440 bond_is_active_slave(slave);
441}
442
443static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
444{
445 struct slave *slave;
446 bool active;
447
448 rcu_read_lock();
449 slave = bond_slave_get_rcu(slave_dev);
450 active = bond_is_active_slave(slave);
451 rcu_read_unlock();
452
453 return active;
454}
455
456static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
457{
458 if (len == ETH_ALEN) {
459 ether_addr_copy(dst, src);
460 return;
461 }
462
463 memcpy(dst, src, len);
464}
465
466#define BOND_PRI_RESELECT_ALWAYS 0
467#define BOND_PRI_RESELECT_BETTER 1
468#define BOND_PRI_RESELECT_FAILURE 2
469
470#define BOND_FOM_NONE 0
471#define BOND_FOM_ACTIVE 1
472#define BOND_FOM_FOLLOW 2
473
474#define BOND_ARP_TARGETS_ANY 0
475#define BOND_ARP_TARGETS_ALL 1
476
477#define BOND_ARP_VALIDATE_NONE 0
478#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
479#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
480#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
481 BOND_ARP_VALIDATE_BACKUP)
482#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
483#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
484 BOND_ARP_FILTER)
485#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
486 BOND_ARP_FILTER)
487
488#define BOND_SLAVE_NOTIFY_NOW true
489#define BOND_SLAVE_NOTIFY_LATER false
490
491static inline int slave_do_arp_validate(struct bonding *bond,
492 struct slave *slave)
493{
494 return bond->params.arp_validate & (1 << bond_slave_state(slave));
495}
496
497static inline int slave_do_arp_validate_only(struct bonding *bond)
498{
499 return bond->params.arp_validate & BOND_ARP_FILTER;
500}
501
502static inline int bond_is_ip_target_ok(__be32 addr)
503{
504 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
505}
506
507#if IS_ENABLED(CONFIG_IPV6)
508static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
509{
510 return !ipv6_addr_any(addr) &&
511 !ipv6_addr_loopback(addr) &&
512 !ipv6_addr_is_multicast(addr);
513}
514#endif
515
516/* Get the oldest arp which we've received on this slave for bond's
517 * arp_targets.
518 */
519static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
520 struct slave *slave)
521{
522 int i = 1;
523 unsigned long ret = slave->target_last_arp_rx[0];
524
525 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
526 if (time_before(slave->target_last_arp_rx[i], ret))
527 ret = slave->target_last_arp_rx[i];
528
529 return ret;
530}
531
532static inline unsigned long slave_last_rx(struct bonding *bond,
533 struct slave *slave)
534{
535 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
536 return slave_oldest_target_arp_rx(bond, slave);
537
538 return slave->last_rx;
539}
540
541static inline void slave_update_last_tx(struct slave *slave)
542{
543 WRITE_ONCE(slave->last_tx, jiffies);
544}
545
546static inline unsigned long slave_last_tx(struct slave *slave)
547{
548 return READ_ONCE(slave->last_tx);
549}
550
551#ifdef CONFIG_NET_POLL_CONTROLLER
552static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
553 struct sk_buff *skb)
554{
555 return netpoll_send_skb(slave->np, skb);
556}
557#else
558static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
559 struct sk_buff *skb)
560{
561 BUG();
562 return NETDEV_TX_OK;
563}
564#endif
565
566static inline void bond_set_slave_inactive_flags(struct slave *slave,
567 bool notify)
568{
569 if (!bond_is_lb(slave->bond))
570 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
571 if (!slave->bond->params.all_slaves_active)
572 slave->inactive = 1;
573 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
574 slave->rx_disabled = 1;
575}
576
577static inline void bond_set_slave_tx_disabled_flags(struct slave *slave,
578 bool notify)
579{
580 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
581}
582
583static inline void bond_set_slave_active_flags(struct slave *slave,
584 bool notify)
585{
586 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
587 slave->inactive = 0;
588 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
589 slave->rx_disabled = 0;
590}
591
592static inline void bond_set_slave_rx_enabled_flags(struct slave *slave,
593 bool notify)
594{
595 slave->rx_disabled = 0;
596}
597
598static inline bool bond_is_slave_inactive(struct slave *slave)
599{
600 return slave->inactive;
601}
602
603static inline bool bond_is_slave_rx_disabled(struct slave *slave)
604{
605 return slave->rx_disabled;
606}
607
608static inline void bond_propose_link_state(struct slave *slave, int state)
609{
610 slave->link_new_state = state;
611}
612
613static inline void bond_commit_link_state(struct slave *slave, bool notify)
614{
615 if (slave->link_new_state == BOND_LINK_NOCHANGE)
616 return;
617
618 slave->link = slave->link_new_state;
619 if (notify) {
620 bond_queue_slave_event(slave);
621 bond_lower_state_changed(slave);
622 slave->should_notify_link = 0;
623 } else {
624 if (slave->should_notify_link)
625 slave->should_notify_link = 0;
626 else
627 slave->should_notify_link = 1;
628 }
629}
630
631static inline void bond_set_slave_link_state(struct slave *slave, int state,
632 bool notify)
633{
634 bond_propose_link_state(slave, state);
635 bond_commit_link_state(slave, notify);
636}
637
638static inline void bond_slave_link_notify(struct bonding *bond)
639{
640 struct list_head *iter;
641 struct slave *tmp;
642
643 bond_for_each_slave(bond, tmp, iter) {
644 if (tmp->should_notify_link) {
645 bond_queue_slave_event(tmp);
646 bond_lower_state_changed(tmp);
647 tmp->should_notify_link = 0;
648 }
649 }
650}
651
652static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
653{
654 struct in_device *in_dev;
655 __be32 addr = 0;
656
657 rcu_read_lock();
658 in_dev = __in_dev_get_rcu(dev);
659
660 if (in_dev)
661 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
662 RT_SCOPE_HOST);
663 rcu_read_unlock();
664 return addr;
665}
666
667struct bond_net {
668 struct net *net; /* Associated network namespace */
669 struct list_head dev_list;
670#ifdef CONFIG_PROC_FS
671 struct proc_dir_entry *proc_dir;
672#endif
673 struct class_attribute class_attr_bonding_masters;
674};
675
676int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
677netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
678int bond_create(struct net *net, const char *name);
679int bond_create_sysfs(struct bond_net *net);
680void bond_destroy_sysfs(struct bond_net *net);
681void bond_prepare_sysfs_group(struct bonding *bond);
682int bond_sysfs_slave_add(struct slave *slave);
683void bond_sysfs_slave_del(struct slave *slave);
684void bond_xdp_set_features(struct net_device *bond_dev);
685int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
686 struct netlink_ext_ack *extack);
687int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
688u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
689int bond_set_carrier(struct bonding *bond);
690void bond_select_active_slave(struct bonding *bond);
691void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
692void bond_create_debugfs(void);
693void bond_destroy_debugfs(void);
694void bond_debug_register(struct bonding *bond);
695void bond_debug_unregister(struct bonding *bond);
696void bond_debug_reregister(struct bonding *bond);
697const char *bond_mode_name(int mode);
698void bond_setup(struct net_device *bond_dev);
699unsigned int bond_get_num_tx_queues(void);
700int bond_netlink_init(void);
701void bond_netlink_fini(void);
702struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
703const char *bond_slave_link_status(s8 link);
704struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
705 struct net_device *end_dev,
706 int level);
707int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
708void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
709void bond_work_init_all(struct bonding *bond);
710
711#ifdef CONFIG_PROC_FS
712void bond_create_proc_entry(struct bonding *bond);
713void bond_remove_proc_entry(struct bonding *bond);
714void bond_create_proc_dir(struct bond_net *bn);
715void bond_destroy_proc_dir(struct bond_net *bn);
716#else
717static inline void bond_create_proc_entry(struct bonding *bond)
718{
719}
720
721static inline void bond_remove_proc_entry(struct bonding *bond)
722{
723}
724
725static inline void bond_create_proc_dir(struct bond_net *bn)
726{
727}
728
729static inline void bond_destroy_proc_dir(struct bond_net *bn)
730{
731}
732#endif
733
734static inline struct slave *bond_slave_has_mac(struct bonding *bond,
735 const u8 *mac)
736{
737 struct list_head *iter;
738 struct slave *tmp;
739
740 bond_for_each_slave(bond, tmp, iter)
741 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
742 return tmp;
743
744 return NULL;
745}
746
747/* Caller must hold rcu_read_lock() for read */
748static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac)
749{
750 struct list_head *iter;
751 struct slave *tmp;
752
753 bond_for_each_slave_rcu(bond, tmp, iter)
754 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
755 return true;
756 return false;
757}
758
759/* Check if the ip is present in arp ip list, or first free slot if ip == 0
760 * Returns -1 if not found, index if found
761 */
762static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
763{
764 int i;
765
766 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
767 if (targets[i] == ip)
768 return i;
769 else if (targets[i] == 0)
770 break;
771
772 return -1;
773}
774
775#if IS_ENABLED(CONFIG_IPV6)
776static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
777{
778 struct in6_addr mcaddr;
779 int i;
780
781 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
782 addrconf_addr_solict_mult(&targets[i], &mcaddr);
783 if ((ipv6_addr_equal(&targets[i], ip)) ||
784 (ipv6_addr_equal(&mcaddr, ip)))
785 return i;
786 else if (ipv6_addr_any(&targets[i]))
787 break;
788 }
789
790 return -1;
791}
792#endif
793
794/* exported from bond_main.c */
795extern unsigned int bond_net_id;
796
797/* exported from bond_netlink.c */
798extern struct rtnl_link_ops bond_link_ops;
799
800/* exported from bond_sysfs_slave.c */
801extern const struct sysfs_ops slave_sysfs_ops;
802
803/* exported from bond_3ad.c */
804extern const u8 lacpdu_mcast_addr[];
805
806static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
807{
808 dev_core_stats_tx_dropped_inc(dev);
809 dev_kfree_skb_any(skb);
810 return NET_XMIT_DROP;
811}
812
813#endif /* _NET_BONDING_H */
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/*
38 * Less bad way to call ioctl from within the kernel; this needs to be
39 * done some other way to get the call out of interrupt context.
40 * Needs "ioctl" variable to be supplied by calling context.
41 */
42#define IOCTL(dev, arg, cmd) ({ \
43 int res = 0; \
44 mm_segment_t fs = get_fs(); \
45 set_fs(get_ds()); \
46 res = ioctl(dev, arg, cmd); \
47 set_fs(fs); \
48 res; })
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#ifdef CONFIG_NET_POLL_CONTROLLER
90extern atomic_t netpoll_block_tx;
91
92static inline void block_netpoll_tx(void)
93{
94 atomic_inc(&netpoll_block_tx);
95}
96
97static inline void unblock_netpoll_tx(void)
98{
99 atomic_dec(&netpoll_block_tx);
100}
101
102static inline int is_netpoll_tx_blocked(struct net_device *dev)
103{
104 if (unlikely(netpoll_tx_running(dev)))
105 return atomic_read(&netpoll_block_tx);
106 return 0;
107}
108#else
109#define block_netpoll_tx()
110#define unblock_netpoll_tx()
111#define is_netpoll_tx_blocked(dev) (0)
112#endif
113
114struct bond_params {
115 int mode;
116 int xmit_policy;
117 int miimon;
118 u8 num_peer_notif;
119 int arp_interval;
120 int arp_validate;
121 int arp_all_targets;
122 int use_carrier;
123 int fail_over_mac;
124 int updelay;
125 int downdelay;
126 int lacp_fast;
127 unsigned int min_links;
128 int ad_select;
129 char primary[IFNAMSIZ];
130 int primary_reselect;
131 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
132 int tx_queues;
133 int all_slaves_active;
134 int resend_igmp;
135 int lp_interval;
136 int packets_per_slave;
137 int tlb_dynamic_lb;
138 struct reciprocal_value reciprocal_packets_per_slave;
139 u16 ad_actor_sys_prio;
140 u16 ad_user_port_key;
141 u8 ad_actor_system[ETH_ALEN];
142};
143
144struct bond_parm_tbl {
145 char *modename;
146 int mode;
147};
148
149struct netdev_notify_work {
150 struct delayed_work work;
151 struct net_device *dev;
152 struct netdev_bonding_info bonding_info;
153};
154
155struct slave {
156 struct net_device *dev; /* first - useful for panic debug */
157 struct bonding *bond; /* our master */
158 int delay;
159 /* all three in jiffies */
160 unsigned long last_link_up;
161 unsigned long last_rx;
162 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
163 s8 link; /* one of BOND_LINK_XXXX */
164 s8 new_link;
165 u8 backup:1, /* indicates backup slave. Value corresponds with
166 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
167 inactive:1, /* indicates inactive slave */
168 should_notify:1, /* indicates whether the state changed */
169 should_notify_link:1; /* indicates whether the link changed */
170 u8 duplex;
171 u32 original_mtu;
172 u32 link_failure_count;
173 u32 speed;
174 u16 queue_id;
175 u8 perm_hwaddr[ETH_ALEN];
176 struct ad_slave_info *ad_info;
177 struct tlb_slave_info tlb_info;
178#ifdef CONFIG_NET_POLL_CONTROLLER
179 struct netpoll *np;
180#endif
181 struct kobject kobj;
182 struct rtnl_link_stats64 slave_stats;
183};
184
185struct bond_up_slave {
186 unsigned int count;
187 struct rcu_head rcu;
188 struct slave *arr[0];
189};
190
191/*
192 * Link pseudo-state only used internally by monitors
193 */
194#define BOND_LINK_NOCHANGE -1
195
196/*
197 * Here are the locking policies for the two bonding locks:
198 * Get rcu_read_lock when reading or RTNL when writing slave list.
199 */
200struct bonding {
201 struct net_device *dev; /* first - useful for panic debug */
202 struct slave __rcu *curr_active_slave;
203 struct slave __rcu *current_arp_slave;
204 struct slave __rcu *primary_slave;
205 struct bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
206 bool force_primary;
207 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
208 int (*recv_probe)(const struct sk_buff *, struct bonding *,
209 struct slave *);
210 /* mode_lock is used for mode-specific locking needs, currently used by:
211 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
212 * bond_3ad_state_machine_handler() concurrently and also
213 * the access to the state machine shared variables.
214 * TLB mode (5) - to sync the use and modifications of its hash table
215 * ALB mode (6) - to sync the use and modifications of its hash table
216 */
217 spinlock_t mode_lock;
218 spinlock_t stats_lock;
219 u8 send_peer_notif;
220 u8 igmp_retrans;
221#ifdef CONFIG_PROC_FS
222 struct proc_dir_entry *proc_entry;
223 char proc_file_name[IFNAMSIZ];
224#endif /* CONFIG_PROC_FS */
225 struct list_head bond_list;
226 u32 rr_tx_counter;
227 struct ad_bond_info ad_info;
228 struct alb_bond_info alb_info;
229 struct bond_params params;
230 struct workqueue_struct *wq;
231 struct delayed_work mii_work;
232 struct delayed_work arp_work;
233 struct delayed_work alb_work;
234 struct delayed_work ad_work;
235 struct delayed_work mcast_work;
236 struct delayed_work slave_arr_work;
237#ifdef CONFIG_DEBUG_FS
238 /* debugging support via debugfs */
239 struct dentry *debug_dir;
240#endif /* CONFIG_DEBUG_FS */
241 struct rtnl_link_stats64 bond_stats;
242};
243
244#define bond_slave_get_rcu(dev) \
245 ((struct slave *) rcu_dereference(dev->rx_handler_data))
246
247#define bond_slave_get_rtnl(dev) \
248 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
249
250void bond_queue_slave_event(struct slave *slave);
251void bond_lower_state_changed(struct slave *slave);
252
253struct bond_vlan_tag {
254 __be16 vlan_proto;
255 unsigned short vlan_id;
256};
257
258/**
259 * Returns NULL if the net_device does not belong to any of the bond's slaves
260 *
261 * Caller must hold bond lock for read
262 */
263static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
264 struct net_device *slave_dev)
265{
266 return netdev_lower_dev_get_private(bond->dev, slave_dev);
267}
268
269static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
270{
271 return slave->bond;
272}
273
274static inline bool bond_should_override_tx_queue(struct bonding *bond)
275{
276 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
277 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
278}
279
280static inline bool bond_is_lb(const struct bonding *bond)
281{
282 return BOND_MODE(bond) == BOND_MODE_TLB ||
283 BOND_MODE(bond) == BOND_MODE_ALB;
284}
285
286static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
287{
288 return (BOND_MODE(bond) == BOND_MODE_TLB) &&
289 (bond->params.tlb_dynamic_lb == 0);
290}
291
292static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
293{
294 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
295 BOND_MODE(bond) == BOND_MODE_XOR ||
296 bond_is_nondyn_tlb(bond));
297}
298
299static inline bool bond_mode_uses_arp(int mode)
300{
301 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
302 mode != BOND_MODE_ALB;
303}
304
305static inline bool bond_mode_uses_primary(int mode)
306{
307 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
308 mode == BOND_MODE_ALB;
309}
310
311static inline bool bond_uses_primary(struct bonding *bond)
312{
313 return bond_mode_uses_primary(BOND_MODE(bond));
314}
315
316static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
317{
318 struct slave *slave = rcu_dereference(bond->curr_active_slave);
319
320 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
321}
322
323static inline bool bond_slave_is_up(struct slave *slave)
324{
325 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
326}
327
328static inline void bond_set_active_slave(struct slave *slave)
329{
330 if (slave->backup) {
331 slave->backup = 0;
332 bond_queue_slave_event(slave);
333 bond_lower_state_changed(slave);
334 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
335 }
336}
337
338static inline void bond_set_backup_slave(struct slave *slave)
339{
340 if (!slave->backup) {
341 slave->backup = 1;
342 bond_queue_slave_event(slave);
343 bond_lower_state_changed(slave);
344 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
345 }
346}
347
348static inline void bond_set_slave_state(struct slave *slave,
349 int slave_state, bool notify)
350{
351 if (slave->backup == slave_state)
352 return;
353
354 slave->backup = slave_state;
355 if (notify) {
356 bond_lower_state_changed(slave);
357 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
358 bond_queue_slave_event(slave);
359 slave->should_notify = 0;
360 } else {
361 if (slave->should_notify)
362 slave->should_notify = 0;
363 else
364 slave->should_notify = 1;
365 }
366}
367
368static inline void bond_slave_state_change(struct bonding *bond)
369{
370 struct list_head *iter;
371 struct slave *tmp;
372
373 bond_for_each_slave(bond, tmp, iter) {
374 if (tmp->link == BOND_LINK_UP)
375 bond_set_active_slave(tmp);
376 else if (tmp->link == BOND_LINK_DOWN)
377 bond_set_backup_slave(tmp);
378 }
379}
380
381static inline void bond_slave_state_notify(struct bonding *bond)
382{
383 struct list_head *iter;
384 struct slave *tmp;
385
386 bond_for_each_slave(bond, tmp, iter) {
387 if (tmp->should_notify) {
388 bond_lower_state_changed(tmp);
389 rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
390 tmp->should_notify = 0;
391 }
392 }
393}
394
395static inline int bond_slave_state(struct slave *slave)
396{
397 return slave->backup;
398}
399
400static inline bool bond_is_active_slave(struct slave *slave)
401{
402 return !bond_slave_state(slave);
403}
404
405static inline bool bond_slave_can_tx(struct slave *slave)
406{
407 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
408 bond_is_active_slave(slave);
409}
410
411#define BOND_PRI_RESELECT_ALWAYS 0
412#define BOND_PRI_RESELECT_BETTER 1
413#define BOND_PRI_RESELECT_FAILURE 2
414
415#define BOND_FOM_NONE 0
416#define BOND_FOM_ACTIVE 1
417#define BOND_FOM_FOLLOW 2
418
419#define BOND_ARP_TARGETS_ANY 0
420#define BOND_ARP_TARGETS_ALL 1
421
422#define BOND_ARP_VALIDATE_NONE 0
423#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
424#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
425#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
426 BOND_ARP_VALIDATE_BACKUP)
427#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
428#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
429 BOND_ARP_FILTER)
430#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
431 BOND_ARP_FILTER)
432
433#define BOND_SLAVE_NOTIFY_NOW true
434#define BOND_SLAVE_NOTIFY_LATER false
435
436static inline int slave_do_arp_validate(struct bonding *bond,
437 struct slave *slave)
438{
439 return bond->params.arp_validate & (1 << bond_slave_state(slave));
440}
441
442static inline int slave_do_arp_validate_only(struct bonding *bond)
443{
444 return bond->params.arp_validate & BOND_ARP_FILTER;
445}
446
447static inline int bond_is_ip_target_ok(__be32 addr)
448{
449 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
450}
451
452/* Get the oldest arp which we've received on this slave for bond's
453 * arp_targets.
454 */
455static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
456 struct slave *slave)
457{
458 int i = 1;
459 unsigned long ret = slave->target_last_arp_rx[0];
460
461 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
462 if (time_before(slave->target_last_arp_rx[i], ret))
463 ret = slave->target_last_arp_rx[i];
464
465 return ret;
466}
467
468static inline unsigned long slave_last_rx(struct bonding *bond,
469 struct slave *slave)
470{
471 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
472 return slave_oldest_target_arp_rx(bond, slave);
473
474 return slave->last_rx;
475}
476
477#ifdef CONFIG_NET_POLL_CONTROLLER
478static inline void bond_netpoll_send_skb(const struct slave *slave,
479 struct sk_buff *skb)
480{
481 struct netpoll *np = slave->np;
482
483 if (np)
484 netpoll_send_skb(np, skb);
485}
486#else
487static inline void bond_netpoll_send_skb(const struct slave *slave,
488 struct sk_buff *skb)
489{
490}
491#endif
492
493static inline void bond_set_slave_inactive_flags(struct slave *slave,
494 bool notify)
495{
496 if (!bond_is_lb(slave->bond))
497 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
498 if (!slave->bond->params.all_slaves_active)
499 slave->inactive = 1;
500}
501
502static inline void bond_set_slave_active_flags(struct slave *slave,
503 bool notify)
504{
505 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
506 slave->inactive = 0;
507}
508
509static inline bool bond_is_slave_inactive(struct slave *slave)
510{
511 return slave->inactive;
512}
513
514static inline void bond_set_slave_link_state(struct slave *slave, int state,
515 bool notify)
516{
517 if (slave->link == state)
518 return;
519
520 slave->link = state;
521 if (notify) {
522 bond_queue_slave_event(slave);
523 bond_lower_state_changed(slave);
524 slave->should_notify_link = 0;
525 } else {
526 if (slave->should_notify_link)
527 slave->should_notify_link = 0;
528 else
529 slave->should_notify_link = 1;
530 }
531}
532
533static inline void bond_slave_link_notify(struct bonding *bond)
534{
535 struct list_head *iter;
536 struct slave *tmp;
537
538 bond_for_each_slave(bond, tmp, iter) {
539 if (tmp->should_notify_link) {
540 bond_queue_slave_event(tmp);
541 bond_lower_state_changed(tmp);
542 tmp->should_notify_link = 0;
543 }
544 }
545}
546
547static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
548{
549 struct in_device *in_dev;
550 __be32 addr = 0;
551
552 rcu_read_lock();
553 in_dev = __in_dev_get_rcu(dev);
554
555 if (in_dev)
556 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
557 RT_SCOPE_HOST);
558 rcu_read_unlock();
559 return addr;
560}
561
562struct bond_net {
563 struct net *net; /* Associated network namespace */
564 struct list_head dev_list;
565#ifdef CONFIG_PROC_FS
566 struct proc_dir_entry *proc_dir;
567#endif
568 struct class_attribute class_attr_bonding_masters;
569};
570
571int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
572void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
573int bond_create(struct net *net, const char *name);
574int bond_create_sysfs(struct bond_net *net);
575void bond_destroy_sysfs(struct bond_net *net);
576void bond_prepare_sysfs_group(struct bonding *bond);
577int bond_sysfs_slave_add(struct slave *slave);
578void bond_sysfs_slave_del(struct slave *slave);
579int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
580int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
581u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
582int bond_set_carrier(struct bonding *bond);
583void bond_select_active_slave(struct bonding *bond);
584void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
585void bond_create_debugfs(void);
586void bond_destroy_debugfs(void);
587void bond_debug_register(struct bonding *bond);
588void bond_debug_unregister(struct bonding *bond);
589void bond_debug_reregister(struct bonding *bond);
590const char *bond_mode_name(int mode);
591void bond_setup(struct net_device *bond_dev);
592unsigned int bond_get_num_tx_queues(void);
593int bond_netlink_init(void);
594void bond_netlink_fini(void);
595struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
596const char *bond_slave_link_status(s8 link);
597struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
598 struct net_device *end_dev,
599 int level);
600int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
601void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
602
603#ifdef CONFIG_PROC_FS
604void bond_create_proc_entry(struct bonding *bond);
605void bond_remove_proc_entry(struct bonding *bond);
606void bond_create_proc_dir(struct bond_net *bn);
607void bond_destroy_proc_dir(struct bond_net *bn);
608#else
609static inline void bond_create_proc_entry(struct bonding *bond)
610{
611}
612
613static inline void bond_remove_proc_entry(struct bonding *bond)
614{
615}
616
617static inline void bond_create_proc_dir(struct bond_net *bn)
618{
619}
620
621static inline void bond_destroy_proc_dir(struct bond_net *bn)
622{
623}
624#endif
625
626static inline struct slave *bond_slave_has_mac(struct bonding *bond,
627 const u8 *mac)
628{
629 struct list_head *iter;
630 struct slave *tmp;
631
632 bond_for_each_slave(bond, tmp, iter)
633 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
634 return tmp;
635
636 return NULL;
637}
638
639/* Caller must hold rcu_read_lock() for read */
640static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
641 const u8 *mac)
642{
643 struct list_head *iter;
644 struct slave *tmp;
645
646 bond_for_each_slave_rcu(bond, tmp, iter)
647 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
648 return tmp;
649
650 return NULL;
651}
652
653/* Caller must hold rcu_read_lock() for read */
654static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
655{
656 struct list_head *iter;
657 struct slave *tmp;
658 struct netdev_hw_addr *ha;
659
660 bond_for_each_slave_rcu(bond, tmp, iter)
661 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
662 return true;
663
664 if (netdev_uc_empty(bond->dev))
665 return false;
666
667 netdev_for_each_uc_addr(ha, bond->dev)
668 if (ether_addr_equal_64bits(mac, ha->addr))
669 return true;
670
671 return false;
672}
673
674/* Check if the ip is present in arp ip list, or first free slot if ip == 0
675 * Returns -1 if not found, index if found
676 */
677static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
678{
679 int i;
680
681 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
682 if (targets[i] == ip)
683 return i;
684 else if (targets[i] == 0)
685 break;
686
687 return -1;
688}
689
690/* exported from bond_main.c */
691extern int bond_net_id;
692extern const struct bond_parm_tbl bond_lacp_tbl[];
693extern const struct bond_parm_tbl xmit_hashtype_tbl[];
694extern const struct bond_parm_tbl arp_validate_tbl[];
695extern const struct bond_parm_tbl arp_all_targets_tbl[];
696extern const struct bond_parm_tbl fail_over_mac_tbl[];
697extern const struct bond_parm_tbl pri_reselect_tbl[];
698extern struct bond_parm_tbl ad_select_tbl[];
699
700/* exported from bond_netlink.c */
701extern struct rtnl_link_ops bond_link_ops;
702
703static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
704{
705 atomic_long_inc(&dev->tx_dropped);
706 dev_kfree_skb_any(skb);
707}
708
709#endif /* _NET_BONDING_H */