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1/*
2 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
3 *
4 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
5 * NCM: Network and Communications Management, Inc.
6 *
7 * BUT, I'm the one who modified it for ethernet, so:
8 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
9 *
10 * This software may be used and distributed according to the terms
11 * of the GNU Public License, incorporated herein by reference.
12 *
13 */
14
15#ifndef _NET_BONDING_H
16#define _NET_BONDING_H
17
18#include <linux/timer.h>
19#include <linux/proc_fs.h>
20#include <linux/if_bonding.h>
21#include <linux/cpumask.h>
22#include <linux/in6.h>
23#include <linux/netpoll.h>
24#include <linux/inetdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/reciprocal_div.h>
27#include <linux/if_link.h>
28
29#include <net/bond_3ad.h>
30#include <net/bond_alb.h>
31#include <net/bond_options.h>
32#include <net/ipv6.h>
33#include <net/addrconf.h>
34
35#define BOND_MAX_ARP_TARGETS 16
36#define BOND_MAX_NS_TARGETS BOND_MAX_ARP_TARGETS
37
38#define BOND_DEFAULT_MIIMON 100
39
40#ifndef __long_aligned
41#define __long_aligned __attribute__((aligned((sizeof(long)))))
42#endif
43
44#define slave_info(bond_dev, slave_dev, fmt, ...) \
45 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
46#define slave_warn(bond_dev, slave_dev, fmt, ...) \
47 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
48#define slave_dbg(bond_dev, slave_dev, fmt, ...) \
49 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
50#define slave_err(bond_dev, slave_dev, fmt, ...) \
51 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
52
53#define BOND_MODE(bond) ((bond)->params.mode)
54
55/* slave list primitives */
56#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
57
58#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
59
60/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
61#define bond_first_slave(bond) \
62 (bond_has_slaves(bond) ? \
63 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
64 NULL)
65#define bond_last_slave(bond) \
66 (bond_has_slaves(bond) ? \
67 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
68 NULL)
69
70/* Caller must have rcu_read_lock */
71#define bond_first_slave_rcu(bond) \
72 netdev_lower_get_first_private_rcu(bond->dev)
73
74#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
75#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
76
77/**
78 * bond_for_each_slave - iterate over all slaves
79 * @bond: the bond holding this list
80 * @pos: current slave
81 * @iter: list_head * iterator
82 *
83 * Caller must hold RTNL
84 */
85#define bond_for_each_slave(bond, pos, iter) \
86 netdev_for_each_lower_private((bond)->dev, pos, iter)
87
88/* Caller must have rcu_read_lock */
89#define bond_for_each_slave_rcu(bond, pos, iter) \
90 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
91
92#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
93 NETIF_F_GSO_ESP)
94
95#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 */
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 */