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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#define BOND_TLS_FEATURES (NETIF_F_HW_TLS_TX | NETIF_F_HW_TLS_RX)
93
94#ifdef CONFIG_NET_POLL_CONTROLLER
95extern atomic_t netpoll_block_tx;
96
97static inline void block_netpoll_tx(void)
98{
99 atomic_inc(&netpoll_block_tx);
100}
101
102static inline void unblock_netpoll_tx(void)
103{
104 atomic_dec(&netpoll_block_tx);
105}
106
107static inline int is_netpoll_tx_blocked(struct net_device *dev)
108{
109 if (unlikely(netpoll_tx_running(dev)))
110 return atomic_read(&netpoll_block_tx);
111 return 0;
112}
113#else
114#define block_netpoll_tx()
115#define unblock_netpoll_tx()
116#define is_netpoll_tx_blocked(dev) (0)
117#endif
118
119struct bond_params {
120 int mode;
121 int xmit_policy;
122 int miimon;
123 u8 num_peer_notif;
124 int arp_interval;
125 int arp_validate;
126 int arp_all_targets;
127 int use_carrier;
128 int fail_over_mac;
129 int updelay;
130 int downdelay;
131 int peer_notif_delay;
132 int lacp_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
149
150 u8 ad_actor_system[ETH_ALEN + 2];
151};
152
153struct slave {
154 struct net_device *dev;
155 struct bonding *bond;
156 int delay;
157
158 unsigned long last_link_up;
159 unsigned long last_rx;
160 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
161 s8 link;
162 s8 link_new_state;
163 u8 backup:1,
164
165 inactive:1,
166 should_notify:1,
167 should_notify_link:1;
168 u8 duplex;
169 u32 original_mtu;
170 u32 link_failure_count;
171 u32 speed;
172 u16 queue_id;
173 u8 perm_hwaddr[MAX_ADDR_LEN];
174 struct ad_slave_info *ad_info;
175 struct tlb_slave_info tlb_info;
176#ifdef CONFIG_NET_POLL_CONTROLLER
177 struct netpoll *np;
178#endif
179 struct delayed_work notify_work;
180 struct kobject kobj;
181 struct rtnl_link_stats64 slave_stats;
182};
183
184static inline struct slave *to_slave(struct kobject *kobj)
185{
186 return container_of(kobj, struct slave, kobj);
187}
188
189struct bond_up_slave {
190 unsigned int count;
191 struct rcu_head rcu;
192 struct slave *arr[];
193};
194
195
196
197
198#define BOND_LINK_NOCHANGE -1
199
200struct bond_ipsec {
201 struct list_head list;
202 struct xfrm_state *xs;
203};
204
205
206
207
208
209struct bonding {
210 struct net_device *dev;
211 struct slave __rcu *curr_active_slave;
212 struct slave __rcu *current_arp_slave;
213 struct slave __rcu *primary_slave;
214 struct bond_up_slave __rcu *usable_slaves;
215 struct bond_up_slave __rcu *all_slaves;
216 bool force_primary;
217 s32 slave_cnt;
218 int (*recv_probe)(const struct sk_buff *, struct bonding *,
219 struct slave *);
220
221
222
223
224
225
226
227 spinlock_t mode_lock;
228 spinlock_t stats_lock;
229 u8 send_peer_notif;
230 u8 igmp_retrans;
231#ifdef CONFIG_PROC_FS
232 struct proc_dir_entry *proc_entry;
233 char proc_file_name[IFNAMSIZ];
234#endif
235 struct list_head bond_list;
236 u32 __percpu *rr_tx_counter;
237 struct ad_bond_info ad_info;
238 struct alb_bond_info alb_info;
239 struct bond_params params;
240 struct workqueue_struct *wq;
241 struct delayed_work mii_work;
242 struct delayed_work arp_work;
243 struct delayed_work alb_work;
244 struct delayed_work ad_work;
245 struct delayed_work mcast_work;
246 struct delayed_work slave_arr_work;
247#ifdef CONFIG_DEBUG_FS
248
249 struct dentry *debug_dir;
250#endif
251 struct rtnl_link_stats64 bond_stats;
252#ifdef CONFIG_XFRM_OFFLOAD
253 struct list_head ipsec_list;
254
255 spinlock_t ipsec_lock;
256#endif
257 struct bpf_prog *xdp_prog;
258};
259
260#define bond_slave_get_rcu(dev) \
261 ((struct slave *) rcu_dereference(dev->rx_handler_data))
262
263#define bond_slave_get_rtnl(dev) \
264 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
265
266void bond_queue_slave_event(struct slave *slave);
267void bond_lower_state_changed(struct slave *slave);
268
269struct bond_vlan_tag {
270 __be16 vlan_proto;
271 unsigned short vlan_id;
272};
273
274bool bond_sk_check(struct bonding *bond);
275
276
277
278
279
280
281static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
282 struct net_device *slave_dev)
283{
284 return netdev_lower_dev_get_private(bond->dev, slave_dev);
285}
286
287static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
288{
289 return slave->bond;
290}
291
292static inline bool bond_should_override_tx_queue(struct bonding *bond)
293{
294 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
295 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
296}
297
298static inline bool bond_is_lb(const struct bonding *bond)
299{
300 return BOND_MODE(bond) == BOND_MODE_TLB ||
301 BOND_MODE(bond) == BOND_MODE_ALB;
302}
303
304static inline bool bond_needs_speed_duplex(const struct bonding *bond)
305{
306 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
307}
308
309static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
310{
311 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
312}
313
314static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
315{
316 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
317 BOND_MODE(bond) == BOND_MODE_XOR ||
318 BOND_MODE(bond) == BOND_MODE_TLB ||
319 BOND_MODE(bond) == BOND_MODE_ALB);
320}
321
322static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
323{
324 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
325 BOND_MODE(bond) == BOND_MODE_XOR ||
326 bond_is_nondyn_tlb(bond));
327}
328
329static inline bool bond_mode_uses_arp(int mode)
330{
331 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
332 mode != BOND_MODE_ALB;
333}
334
335static inline bool bond_mode_uses_primary(int mode)
336{
337 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
338 mode == BOND_MODE_ALB;
339}
340
341static inline bool bond_uses_primary(struct bonding *bond)
342{
343 return bond_mode_uses_primary(BOND_MODE(bond));
344}
345
346static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
347{
348 struct slave *slave = rcu_dereference(bond->curr_active_slave);
349
350 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
351}
352
353static inline bool bond_slave_is_up(struct slave *slave)
354{
355 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
356}
357
358static inline void bond_set_active_slave(struct slave *slave)
359{
360 if (slave->backup) {
361 slave->backup = 0;
362 bond_queue_slave_event(slave);
363 bond_lower_state_changed(slave);
364 }
365}
366
367static inline void bond_set_backup_slave(struct slave *slave)
368{
369 if (!slave->backup) {
370 slave->backup = 1;
371 bond_queue_slave_event(slave);
372 bond_lower_state_changed(slave);
373 }
374}
375
376static inline void bond_set_slave_state(struct slave *slave,
377 int slave_state, bool notify)
378{
379 if (slave->backup == slave_state)
380 return;
381
382 slave->backup = slave_state;
383 if (notify) {
384 bond_lower_state_changed(slave);
385 bond_queue_slave_event(slave);
386 slave->should_notify = 0;
387 } else {
388 if (slave->should_notify)
389 slave->should_notify = 0;
390 else
391 slave->should_notify = 1;
392 }
393}
394
395static inline void bond_slave_state_change(struct bonding *bond)
396{
397 struct list_head *iter;
398 struct slave *tmp;
399
400 bond_for_each_slave(bond, tmp, iter) {
401 if (tmp->link == BOND_LINK_UP)
402 bond_set_active_slave(tmp);
403 else if (tmp->link == BOND_LINK_DOWN)
404 bond_set_backup_slave(tmp);
405 }
406}
407
408static inline void bond_slave_state_notify(struct bonding *bond)
409{
410 struct list_head *iter;
411 struct slave *tmp;
412
413 bond_for_each_slave(bond, tmp, iter) {
414 if (tmp->should_notify) {
415 bond_lower_state_changed(tmp);
416 tmp->should_notify = 0;
417 }
418 }
419}
420
421static inline int bond_slave_state(struct slave *slave)
422{
423 return slave->backup;
424}
425
426static inline bool bond_is_active_slave(struct slave *slave)
427{
428 return !bond_slave_state(slave);
429}
430
431static inline bool bond_slave_can_tx(struct slave *slave)
432{
433 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
434 bond_is_active_slave(slave);
435}
436
437static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
438{
439 struct slave *slave;
440 bool active;
441
442 rcu_read_lock();
443 slave = bond_slave_get_rcu(slave_dev);
444 active = bond_is_active_slave(slave);
445 rcu_read_unlock();
446
447 return active;
448}
449
450static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
451{
452 if (len == ETH_ALEN) {
453 ether_addr_copy(dst, src);
454 return;
455 }
456
457 memcpy(dst, src, len);
458}
459
460#define BOND_PRI_RESELECT_ALWAYS 0
461#define BOND_PRI_RESELECT_BETTER 1
462#define BOND_PRI_RESELECT_FAILURE 2
463
464#define BOND_FOM_NONE 0
465#define BOND_FOM_ACTIVE 1
466#define BOND_FOM_FOLLOW 2
467
468#define BOND_ARP_TARGETS_ANY 0
469#define BOND_ARP_TARGETS_ALL 1
470
471#define BOND_ARP_VALIDATE_NONE 0
472#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
473#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
474#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
475 BOND_ARP_VALIDATE_BACKUP)
476#define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
477#define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
478 BOND_ARP_FILTER)
479#define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
480 BOND_ARP_FILTER)
481
482#define BOND_SLAVE_NOTIFY_NOW true
483#define BOND_SLAVE_NOTIFY_LATER false
484
485static inline int slave_do_arp_validate(struct bonding *bond,
486 struct slave *slave)
487{
488 return bond->params.arp_validate & (1 << bond_slave_state(slave));
489}
490
491static inline int slave_do_arp_validate_only(struct bonding *bond)
492{
493 return bond->params.arp_validate & BOND_ARP_FILTER;
494}
495
496static inline int bond_is_ip_target_ok(__be32 addr)
497{
498 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
499}
500
501
502
503
504static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
505 struct slave *slave)
506{
507 int i = 1;
508 unsigned long ret = slave->target_last_arp_rx[0];
509
510 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
511 if (time_before(slave->target_last_arp_rx[i], ret))
512 ret = slave->target_last_arp_rx[i];
513
514 return ret;
515}
516
517static inline unsigned long slave_last_rx(struct bonding *bond,
518 struct slave *slave)
519{
520 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
521 return slave_oldest_target_arp_rx(bond, slave);
522
523 return slave->last_rx;
524}
525
526#ifdef CONFIG_NET_POLL_CONTROLLER
527static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
528 struct sk_buff *skb)
529{
530 return netpoll_send_skb(slave->np, skb);
531}
532#else
533static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
534 struct sk_buff *skb)
535{
536 BUG();
537 return NETDEV_TX_OK;
538}
539#endif
540
541static inline void bond_set_slave_inactive_flags(struct slave *slave,
542 bool notify)
543{
544 if (!bond_is_lb(slave->bond))
545 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
546 if (!slave->bond->params.all_slaves_active)
547 slave->inactive = 1;
548}
549
550static inline void bond_set_slave_active_flags(struct slave *slave,
551 bool notify)
552{
553 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
554 slave->inactive = 0;
555}
556
557static inline bool bond_is_slave_inactive(struct slave *slave)
558{
559 return slave->inactive;
560}
561
562static inline void bond_propose_link_state(struct slave *slave, int state)
563{
564 slave->link_new_state = state;
565}
566
567static inline void bond_commit_link_state(struct slave *slave, bool notify)
568{
569 if (slave->link_new_state == BOND_LINK_NOCHANGE)
570 return;
571
572 slave->link = slave->link_new_state;
573 if (notify) {
574 bond_queue_slave_event(slave);
575 bond_lower_state_changed(slave);
576 slave->should_notify_link = 0;
577 } else {
578 if (slave->should_notify_link)
579 slave->should_notify_link = 0;
580 else
581 slave->should_notify_link = 1;
582 }
583}
584
585static inline void bond_set_slave_link_state(struct slave *slave, int state,
586 bool notify)
587{
588 bond_propose_link_state(slave, state);
589 bond_commit_link_state(slave, notify);
590}
591
592static inline void bond_slave_link_notify(struct bonding *bond)
593{
594 struct list_head *iter;
595 struct slave *tmp;
596
597 bond_for_each_slave(bond, tmp, iter) {
598 if (tmp->should_notify_link) {
599 bond_queue_slave_event(tmp);
600 bond_lower_state_changed(tmp);
601 tmp->should_notify_link = 0;
602 }
603 }
604}
605
606static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
607{
608 struct in_device *in_dev;
609 __be32 addr = 0;
610
611 rcu_read_lock();
612 in_dev = __in_dev_get_rcu(dev);
613
614 if (in_dev)
615 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
616 RT_SCOPE_HOST);
617 rcu_read_unlock();
618 return addr;
619}
620
621struct bond_net {
622 struct net *net;
623 struct list_head dev_list;
624#ifdef CONFIG_PROC_FS
625 struct proc_dir_entry *proc_dir;
626#endif
627 struct class_attribute class_attr_bonding_masters;
628};
629
630int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
631netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
632int bond_create(struct net *net, const char *name);
633int bond_create_sysfs(struct bond_net *net);
634void bond_destroy_sysfs(struct bond_net *net);
635void bond_prepare_sysfs_group(struct bonding *bond);
636int bond_sysfs_slave_add(struct slave *slave);
637void bond_sysfs_slave_del(struct slave *slave);
638int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
639 struct netlink_ext_ack *extack);
640int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
641u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
642int bond_set_carrier(struct bonding *bond);
643void bond_select_active_slave(struct bonding *bond);
644void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
645void bond_create_debugfs(void);
646void bond_destroy_debugfs(void);
647void bond_debug_register(struct bonding *bond);
648void bond_debug_unregister(struct bonding *bond);
649void bond_debug_reregister(struct bonding *bond);
650const char *bond_mode_name(int mode);
651void bond_setup(struct net_device *bond_dev);
652unsigned int bond_get_num_tx_queues(void);
653int bond_netlink_init(void);
654void bond_netlink_fini(void);
655struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
656const char *bond_slave_link_status(s8 link);
657struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
658 struct net_device *end_dev,
659 int level);
660int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
661void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
662void bond_work_init_all(struct bonding *bond);
663
664#ifdef CONFIG_PROC_FS
665void bond_create_proc_entry(struct bonding *bond);
666void bond_remove_proc_entry(struct bonding *bond);
667void bond_create_proc_dir(struct bond_net *bn);
668void bond_destroy_proc_dir(struct bond_net *bn);
669#else
670static inline void bond_create_proc_entry(struct bonding *bond)
671{
672}
673
674static inline void bond_remove_proc_entry(struct bonding *bond)
675{
676}
677
678static inline void bond_create_proc_dir(struct bond_net *bn)
679{
680}
681
682static inline void bond_destroy_proc_dir(struct bond_net *bn)
683{
684}
685#endif
686
687static inline struct slave *bond_slave_has_mac(struct bonding *bond,
688 const u8 *mac)
689{
690 struct list_head *iter;
691 struct slave *tmp;
692
693 bond_for_each_slave(bond, tmp, iter)
694 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
695 return tmp;
696
697 return NULL;
698}
699
700
701static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
702 const u8 *mac)
703{
704 struct list_head *iter;
705 struct slave *tmp;
706
707 bond_for_each_slave_rcu(bond, tmp, iter)
708 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
709 return tmp;
710
711 return NULL;
712}
713
714
715static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
716{
717 struct list_head *iter;
718 struct slave *tmp;
719 struct netdev_hw_addr *ha;
720
721 bond_for_each_slave_rcu(bond, tmp, iter)
722 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
723 return true;
724
725 if (netdev_uc_empty(bond->dev))
726 return false;
727
728 netdev_for_each_uc_addr(ha, bond->dev)
729 if (ether_addr_equal_64bits(mac, ha->addr))
730 return true;
731
732 return false;
733}
734
735
736
737
738static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
739{
740 int i;
741
742 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
743 if (targets[i] == ip)
744 return i;
745 else if (targets[i] == 0)
746 break;
747
748 return -1;
749}
750
751
752extern unsigned int bond_net_id;
753
754
755extern struct rtnl_link_ops bond_link_ops;
756
757
758extern const struct sysfs_ops slave_sysfs_ops;
759
760static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
761{
762 atomic_long_inc(&dev->tx_dropped);
763 dev_kfree_skb_any(skb);
764 return NET_XMIT_DROP;
765}
766
767#endif
768
