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