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