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15#ifndef _NET_BONDING_H
16#define _NET_BONDING_H
17
18#include <linux/timer.h>
19#include <linux/proc_fs.h>
20#include <linux/if_bonding.h>
21#include <linux/cpumask.h>
22#include <linux/in6.h>
23#include <linux/netpoll.h>
24#include <linux/inetdevice.h>
25#include <linux/etherdevice.h>
26#include <linux/reciprocal_div.h>
27#include <linux/if_link.h>
28
29#include <net/bond_3ad.h>
30#include <net/bond_alb.h>
31#include <net/bond_options.h>
32
33#define BOND_MAX_ARP_TARGETS 16
34
35#define BOND_DEFAULT_MIIMON 100
36
37#ifndef __long_aligned
38#define __long_aligned __attribute__((aligned((sizeof(long)))))
39#endif
40
41#define slave_info(bond_dev, slave_dev, fmt, ...) \
42 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
43#define slave_warn(bond_dev, slave_dev, fmt, ...) \
44 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
45#define slave_dbg(bond_dev, slave_dev, fmt, ...) \
46 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
47#define slave_err(bond_dev, slave_dev, fmt, ...) \
48 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
49
50#define BOND_MODE(bond) ((bond)->params.mode)
51
52
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
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
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
76
77
78
79
80
81
82#define bond_for_each_slave(bond, pos, iter) \
83 netdev_for_each_lower_private((bond)->dev, pos, iter)
84
85
86#define bond_for_each_slave_rcu(bond, pos, iter) \
87 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
88
89#define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
90 NETIF_F_GSO_ESP)
91
92#ifdef CONFIG_NET_POLL_CONTROLLER
93extern atomic_t netpoll_block_tx;
94
95static inline void block_netpoll_tx(void)
96{
97 atomic_inc(&netpoll_block_tx);
98}
99
100static inline void unblock_netpoll_tx(void)
101{
102 atomic_dec(&netpoll_block_tx);
103}
104
105static inline int is_netpoll_tx_blocked(struct net_device *dev)
106{
107 if (unlikely(netpoll_tx_running(dev)))
108 return atomic_read(&netpoll_block_tx);
109 return 0;
110}
111#else
112#define block_netpoll_tx()
113#define unblock_netpoll_tx()
114#define is_netpoll_tx_blocked(dev) (0)
115#endif
116
117struct bond_params {
118 int mode;
119 int xmit_policy;
120 int miimon;
121 u8 num_peer_notif;
122 int arp_interval;
123 int arp_validate;
124 int arp_all_targets;
125 int use_carrier;
126 int fail_over_mac;
127 int updelay;
128 int downdelay;
129 int peer_notif_delay;
130 int lacp_fast;
131 unsigned int min_links;
132 int ad_select;
133 char primary[IFNAMSIZ];
134 int primary_reselect;
135 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
136 int tx_queues;
137 int all_slaves_active;
138 int resend_igmp;
139 int lp_interval;
140 int packets_per_slave;
141 int tlb_dynamic_lb;
142 struct reciprocal_value reciprocal_packets_per_slave;
143 u16 ad_actor_sys_prio;
144 u16 ad_user_port_key;
145
146
147 u8 ad_actor_system[ETH_ALEN + 2];
148};
149
150struct bond_parm_tbl {
151 char *modename;
152 int mode;
153};
154
155struct slave {
156 struct net_device *dev;
157 struct bonding *bond;
158 int delay;
159
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;
164 s8 link_new_state;
165 u8 backup:1,
166
167 inactive:1,
168 should_notify:1,
169 should_notify_link:1;
170 u8 duplex;
171 u32 original_mtu;
172 u32 link_failure_count;
173 u32 speed;
174 u16 queue_id;
175 u8 perm_hwaddr[MAX_ADDR_LEN];
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 delayed_work notify_work;
182 struct kobject kobj;
183 struct rtnl_link_stats64 slave_stats;
184};
185
186static inline struct slave *to_slave(struct kobject *kobj)
187{
188 return container_of(kobj, struct slave, kobj);
189}
190
191struct bond_up_slave {
192 unsigned int count;
193 struct rcu_head rcu;
194 struct slave *arr[];
195};
196
197
198
199
200#define BOND_LINK_NOCHANGE -1
201
202
203
204
205
206struct bonding {
207 struct net_device *dev;
208 struct slave __rcu *curr_active_slave;
209 struct slave __rcu *current_arp_slave;
210 struct slave __rcu *primary_slave;
211 struct bond_up_slave __rcu *usable_slaves;
212 struct bond_up_slave __rcu *all_slaves;
213 bool force_primary;
214 s32 slave_cnt;
215 int (*recv_probe)(const struct sk_buff *, struct bonding *,
216 struct slave *);
217
218
219
220
221
222
223
224 spinlock_t mode_lock;
225 spinlock_t stats_lock;
226 u8 send_peer_notif;
227 u8 igmp_retrans;
228#ifdef CONFIG_PROC_FS
229 struct proc_dir_entry *proc_entry;
230 char proc_file_name[IFNAMSIZ];
231#endif
232 struct list_head bond_list;
233 u32 rr_tx_counter;
234 struct ad_bond_info ad_info;
235 struct alb_bond_info alb_info;
236 struct bond_params params;
237 struct workqueue_struct *wq;
238 struct delayed_work mii_work;
239 struct delayed_work arp_work;
240 struct delayed_work alb_work;
241 struct delayed_work ad_work;
242 struct delayed_work mcast_work;
243 struct delayed_work slave_arr_work;
244#ifdef CONFIG_DEBUG_FS
245
246 struct dentry *debug_dir;
247#endif
248 struct rtnl_link_stats64 bond_stats;
249#ifdef CONFIG_XFRM_OFFLOAD
250 struct xfrm_state *xs;
251#endif
252};
253
254#define bond_slave_get_rcu(dev) \
255 ((struct slave *) rcu_dereference(dev->rx_handler_data))
256
257#define bond_slave_get_rtnl(dev) \
258 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
259
260void bond_queue_slave_event(struct slave *slave);
261void bond_lower_state_changed(struct slave *slave);
262
263struct bond_vlan_tag {
264 __be16 vlan_proto;
265 unsigned short vlan_id;
266};
267
268
269
270
271
272
273static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
274 struct net_device *slave_dev)
275{
276 return netdev_lower_dev_get_private(bond->dev, slave_dev);
277}
278
279static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
280{
281 return slave->bond;
282}
283
284static inline bool bond_should_override_tx_queue(struct bonding *bond)
285{
286 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
287 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
288}
289
290static inline bool bond_is_lb(const struct bonding *bond)
291{
292 return BOND_MODE(bond) == BOND_MODE_TLB ||
293 BOND_MODE(bond) == BOND_MODE_ALB;
294}
295
296static inline bool bond_needs_speed_duplex(const struct bonding *bond)
297{
298 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
299}
300
301static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
302{
303 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
304}
305
306static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
307{
308 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
309 BOND_MODE(bond) == BOND_MODE_XOR ||
310 BOND_MODE(bond) == BOND_MODE_TLB ||
311 BOND_MODE(bond) == BOND_MODE_ALB);
312}
313
314static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
315{
316 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
317 BOND_MODE(bond) == BOND_MODE_XOR ||
318 bond_is_nondyn_tlb(bond));
319}
320
321static inline bool bond_mode_uses_arp(int mode)
322{
323 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
324 mode != BOND_MODE_ALB;
325}
326
327static inline bool bond_mode_uses_primary(int mode)
328{
329 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
330 mode == BOND_MODE_ALB;
331}
332
333static inline bool bond_uses_primary(struct bonding *bond)
334{
335 return bond_mode_uses_primary(BOND_MODE(bond));
336}
337
338static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
339{
340 struct slave *slave = rcu_dereference(bond->curr_active_slave);
341
342 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
343}
344
345static inline bool bond_slave_is_up(struct slave *slave)
346{
347 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
348}
349
350static inline void bond_set_active_slave(struct slave *slave)
351{
352 if (slave->backup) {
353 slave->backup = 0;
354 bond_queue_slave_event(slave);
355 bond_lower_state_changed(slave);
356 }
357}
358
359static inline void bond_set_backup_slave(struct slave *slave)
360{
361 if (!slave->backup) {
362 slave->backup = 1;
363 bond_queue_slave_event(slave);
364 bond_lower_state_changed(slave);
365 }
366}
367
368static inline void bond_set_slave_state(struct slave *slave,
369 int slave_state, bool notify)
370{
371 if (slave->backup == slave_state)
372 return;
373
374 slave->backup = slave_state;
375 if (notify) {
376 bond_lower_state_changed(slave);
377 bond_queue_slave_event(slave);
378 slave->should_notify = 0;
379 } else {
380 if (slave->should_notify)
381 slave->should_notify = 0;
382 else
383 slave->should_notify = 1;
384 }
385}
386
387static inline void bond_slave_state_change(struct bonding *bond)
388{
389 struct list_head *iter;
390 struct slave *tmp;
391
392 bond_for_each_slave(bond, tmp, iter) {
393 if (tmp->link == BOND_LINK_UP)
394 bond_set_active_slave(tmp);
395 else if (tmp->link == BOND_LINK_DOWN)
396 bond_set_backup_slave(tmp);
397 }
398}
399
400static inline void bond_slave_state_notify(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->should_notify) {
407 bond_lower_state_changed(tmp);
408 tmp->should_notify = 0;
409 }
410 }
411}
412
413static inline int bond_slave_state(struct slave *slave)
414{
415 return slave->backup;
416}
417
418static inline bool bond_is_active_slave(struct slave *slave)
419{
420 return !bond_slave_state(slave);
421}
422
423static inline bool bond_slave_can_tx(struct slave *slave)
424{
425 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
426 bond_is_active_slave(slave);
427}
428
429static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
430{
431 struct slave *slave;
432 bool active;
433
434 rcu_read_lock();
435 slave = bond_slave_get_rcu(slave_dev);
436 active = bond_is_active_slave(slave);
437 rcu_read_unlock();
438
439 return active;
440}
441
442static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
443{
444 if (len == ETH_ALEN) {
445 ether_addr_copy(dst, src);
446 return;
447 }
448
449 memcpy(dst, src, len);
450}
451
452#define BOND_PRI_RESELECT_ALWAYS 0
453#define BOND_PRI_RESELECT_BETTER 1
454#define BOND_PRI_RESELECT_FAILURE 2
455
456#define BOND_FOM_NONE 0
457#define BOND_FOM_ACTIVE 1
458#define BOND_FOM_FOLLOW 2
459
460#define BOND_ARP_TARGETS_ANY 0
461#define BOND_ARP_TARGETS_ALL 1
462
463#define BOND_ARP_VALIDATE_NONE 0
464#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
465#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
466#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
467 BOND_ARP_VALIDATE_BACKUP)
468#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
469#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
470 BOND_ARP_FILTER)
471#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
472 BOND_ARP_FILTER)
473
474#define BOND_SLAVE_NOTIFY_NOW true
475#define BOND_SLAVE_NOTIFY_LATER false
476
477static inline int slave_do_arp_validate(struct bonding *bond,
478 struct slave *slave)
479{
480 return bond->params.arp_validate & (1 << bond_slave_state(slave));
481}
482
483static inline int slave_do_arp_validate_only(struct bonding *bond)
484{
485 return bond->params.arp_validate & BOND_ARP_FILTER;
486}
487
488static inline int bond_is_ip_target_ok(__be32 addr)
489{
490 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
491}
492
493
494
495
496static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
497 struct slave *slave)
498{
499 int i = 1;
500 unsigned long ret = slave->target_last_arp_rx[0];
501
502 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
503 if (time_before(slave->target_last_arp_rx[i], ret))
504 ret = slave->target_last_arp_rx[i];
505
506 return ret;
507}
508
509static inline unsigned long slave_last_rx(struct bonding *bond,
510 struct slave *slave)
511{
512 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
513 return slave_oldest_target_arp_rx(bond, slave);
514
515 return slave->last_rx;
516}
517
518#ifdef CONFIG_NET_POLL_CONTROLLER
519static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
520 struct sk_buff *skb)
521{
522 return netpoll_send_skb(slave->np, skb);
523}
524#else
525static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
526 struct sk_buff *skb)
527{
528 BUG();
529 return NETDEV_TX_OK;
530}
531#endif
532
533static inline void bond_set_slave_inactive_flags(struct slave *slave,
534 bool notify)
535{
536 if (!bond_is_lb(slave->bond))
537 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
538 if (!slave->bond->params.all_slaves_active)
539 slave->inactive = 1;
540}
541
542static inline void bond_set_slave_active_flags(struct slave *slave,
543 bool notify)
544{
545 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
546 slave->inactive = 0;
547}
548
549static inline bool bond_is_slave_inactive(struct slave *slave)
550{
551 return slave->inactive;
552}
553
554static inline void bond_propose_link_state(struct slave *slave, int state)
555{
556 slave->link_new_state = state;
557}
558
559static inline void bond_commit_link_state(struct slave *slave, bool notify)
560{
561 if (slave->link_new_state == BOND_LINK_NOCHANGE)
562 return;
563
564 slave->link = slave->link_new_state;
565 if (notify) {
566 bond_queue_slave_event(slave);
567 bond_lower_state_changed(slave);
568 slave->should_notify_link = 0;
569 } else {
570 if (slave->should_notify_link)
571 slave->should_notify_link = 0;
572 else
573 slave->should_notify_link = 1;
574 }
575}
576
577static inline void bond_set_slave_link_state(struct slave *slave, int state,
578 bool notify)
579{
580 bond_propose_link_state(slave, state);
581 bond_commit_link_state(slave, notify);
582}
583
584static inline void bond_slave_link_notify(struct bonding *bond)
585{
586 struct list_head *iter;
587 struct slave *tmp;
588
589 bond_for_each_slave(bond, tmp, iter) {
590 if (tmp->should_notify_link) {
591 bond_queue_slave_event(tmp);
592 bond_lower_state_changed(tmp);
593 tmp->should_notify_link = 0;
594 }
595 }
596}
597
598static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
599{
600 struct in_device *in_dev;
601 __be32 addr = 0;
602
603 rcu_read_lock();
604 in_dev = __in_dev_get_rcu(dev);
605
606 if (in_dev)
607 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
608 RT_SCOPE_HOST);
609 rcu_read_unlock();
610 return addr;
611}
612
613struct bond_net {
614 struct net *net;
615 struct list_head dev_list;
616#ifdef CONFIG_PROC_FS
617 struct proc_dir_entry *proc_dir;
618#endif
619 struct class_attribute class_attr_bonding_masters;
620};
621
622int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
623netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
624int bond_create(struct net *net, const char *name);
625int bond_create_sysfs(struct bond_net *net);
626void bond_destroy_sysfs(struct bond_net *net);
627void bond_prepare_sysfs_group(struct bonding *bond);
628int bond_sysfs_slave_add(struct slave *slave);
629void bond_sysfs_slave_del(struct slave *slave);
630int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
631 struct netlink_ext_ack *extack);
632int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
633u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
634int bond_set_carrier(struct bonding *bond);
635void bond_select_active_slave(struct bonding *bond);
636void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
637void bond_create_debugfs(void);
638void bond_destroy_debugfs(void);
639void bond_debug_register(struct bonding *bond);
640void bond_debug_unregister(struct bonding *bond);
641void bond_debug_reregister(struct bonding *bond);
642const char *bond_mode_name(int mode);
643void bond_setup(struct net_device *bond_dev);
644unsigned int bond_get_num_tx_queues(void);
645int bond_netlink_init(void);
646void bond_netlink_fini(void);
647struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
648const char *bond_slave_link_status(s8 link);
649struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
650 struct net_device *end_dev,
651 int level);
652int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
653void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
654void bond_work_init_all(struct bonding *bond);
655
656#ifdef CONFIG_PROC_FS
657void bond_create_proc_entry(struct bonding *bond);
658void bond_remove_proc_entry(struct bonding *bond);
659void bond_create_proc_dir(struct bond_net *bn);
660void bond_destroy_proc_dir(struct bond_net *bn);
661#else
662static inline void bond_create_proc_entry(struct bonding *bond)
663{
664}
665
666static inline void bond_remove_proc_entry(struct bonding *bond)
667{
668}
669
670static inline void bond_create_proc_dir(struct bond_net *bn)
671{
672}
673
674static inline void bond_destroy_proc_dir(struct bond_net *bn)
675{
676}
677#endif
678
679static inline struct slave *bond_slave_has_mac(struct bonding *bond,
680 const u8 *mac)
681{
682 struct list_head *iter;
683 struct slave *tmp;
684
685 bond_for_each_slave(bond, tmp, iter)
686 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
687 return tmp;
688
689 return NULL;
690}
691
692
693static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
694 const u8 *mac)
695{
696 struct list_head *iter;
697 struct slave *tmp;
698
699 bond_for_each_slave_rcu(bond, tmp, iter)
700 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
701 return tmp;
702
703 return NULL;
704}
705
706
707static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
708{
709 struct list_head *iter;
710 struct slave *tmp;
711 struct netdev_hw_addr *ha;
712
713 bond_for_each_slave_rcu(bond, tmp, iter)
714 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
715 return true;
716
717 if (netdev_uc_empty(bond->dev))
718 return false;
719
720 netdev_for_each_uc_addr(ha, bond->dev)
721 if (ether_addr_equal_64bits(mac, ha->addr))
722 return true;
723
724 return false;
725}
726
727
728
729
730static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
731{
732 int i;
733
734 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
735 if (targets[i] == ip)
736 return i;
737 else if (targets[i] == 0)
738 break;
739
740 return -1;
741}
742
743
744extern unsigned int bond_net_id;
745extern const struct bond_parm_tbl bond_lacp_tbl[];
746extern const struct bond_parm_tbl xmit_hashtype_tbl[];
747extern const struct bond_parm_tbl arp_validate_tbl[];
748extern const struct bond_parm_tbl arp_all_targets_tbl[];
749extern const struct bond_parm_tbl fail_over_mac_tbl[];
750extern const struct bond_parm_tbl pri_reselect_tbl[];
751extern struct bond_parm_tbl ad_select_tbl[];
752
753
754extern struct rtnl_link_ops bond_link_ops;
755
756
757extern const struct sysfs_ops slave_sysfs_ops;
758
759static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
760{
761 atomic_long_inc(&dev->tx_dropped);
762 dev_kfree_skb_any(skb);
763 return NET_XMIT_DROP;
764}
765
766#endif
767
