1 /* SPDX-License-Identifier: GPL-1.0+ */
2 /*
3 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
4 *
5 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
6 * NCM: Network and Communications Management, Inc.
7 *
8 * BUT, I'm the one who modified it for ethernet, so:
9 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
10 *
11 */
12
13 #ifndef _NET_BONDING_H
14 #define _NET_BONDING_H
15
16 #include <linux/timer.h>
17 #include <linux/proc_fs.h>
18 #include <linux/if_bonding.h>
19 #include <linux/cpumask.h>
20 #include <linux/in6.h>
21 #include <linux/netpoll.h>
22 #include <linux/inetdevice.h>
23 #include <linux/etherdevice.h>
24 #include <linux/reciprocal_div.h>
25 #include <linux/if_link.h>
26
27 #include <net/bond_3ad.h>
28 #include <net/bond_alb.h>
29 #include <net/bond_options.h>
30 #include <net/ipv6.h>
31 #include <net/addrconf.h>
32
33 #define BOND_MAX_ARP_TARGETS 16
34 #define BOND_MAX_NS_TARGETS BOND_MAX_ARP_TARGETS
35
36 #define BOND_DEFAULT_MIIMON 100
37
38 #ifndef __long_aligned
39 #define __long_aligned __attribute__((aligned((sizeof(long)))))
40 #endif
41
42 #define slave_info(bond_dev, slave_dev, fmt, ...) \
43 netdev_info(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
44 #define slave_warn(bond_dev, slave_dev, fmt, ...) \
45 netdev_warn(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
46 #define slave_dbg(bond_dev, slave_dev, fmt, ...) \
47 netdev_dbg(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
48 #define slave_err(bond_dev, slave_dev, fmt, ...) \
49 netdev_err(bond_dev, "(slave %s): " fmt, (slave_dev)->name, ##__VA_ARGS__)
50
51 #define BOND_MODE(bond) ((bond)->params.mode)
52
53 /* slave list primitives */
54 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
55
56 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
57
58 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
59 #define bond_first_slave(bond) \
60 (bond_has_slaves(bond) ? \
61 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
62 NULL)
63 #define bond_last_slave(bond) \
64 (bond_has_slaves(bond) ? \
65 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
66 NULL)
67
68 /* Caller must have rcu_read_lock */
69 #define bond_first_slave_rcu(bond) \
70 netdev_lower_get_first_private_rcu(bond->dev)
71
72 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
73 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
74
75 /**
76 * bond_for_each_slave - iterate over all slaves
77 * @bond: the bond holding this list
78 * @pos: current slave
79 * @iter: list_head * iterator
80 *
81 * Caller must hold RTNL
82 */
83 #define bond_for_each_slave(bond, pos, iter) \
84 netdev_for_each_lower_private((bond)->dev, pos, iter)
85
86 /* Caller must have rcu_read_lock */
87 #define bond_for_each_slave_rcu(bond, pos, iter) \
88 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
89
90 #define BOND_XFRM_FEATURES (NETIF_F_HW_ESP | NETIF_F_HW_ESP_TX_CSUM | \
91 NETIF_F_GSO_ESP)
92
93 #ifdef CONFIG_NET_POLL_CONTROLLER
94 extern atomic_t netpoll_block_tx;
95
block_netpoll_tx(void)96 static inline void block_netpoll_tx(void)
97 {
98 atomic_inc(&netpoll_block_tx);
99 }
100
unblock_netpoll_tx(void)101 static inline void unblock_netpoll_tx(void)
102 {
103 atomic_dec(&netpoll_block_tx);
104 }
105
is_netpoll_tx_blocked(struct net_device * dev)106 static inline int is_netpoll_tx_blocked(struct net_device *dev)
107 {
108 if (unlikely(netpoll_tx_running(dev)))
109 return atomic_read(&netpoll_block_tx);
110 return 0;
111 }
112 #else
113 #define block_netpoll_tx()
114 #define unblock_netpoll_tx()
115 #define is_netpoll_tx_blocked(dev) (0)
116 #endif
117
118 DECLARE_STATIC_KEY_FALSE(bond_bcast_neigh_enabled);
119
120 struct 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 fail_over_mac;
130 int updelay;
131 int downdelay;
132 int peer_notif_delay;
133 int lacp_active;
134 int lacp_fast;
135 unsigned int min_links;
136 int ad_select;
137 char primary[IFNAMSIZ];
138 int primary_reselect;
139 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
140 int tx_queues;
141 int all_slaves_active;
142 int resend_igmp;
143 int lp_interval;
144 int packets_per_slave;
145 int tlb_dynamic_lb;
146 struct reciprocal_value reciprocal_packets_per_slave;
147 u16 ad_actor_sys_prio;
148 u16 ad_user_port_key;
149 #if IS_ENABLED(CONFIG_IPV6)
150 struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
151 #endif
152 int coupled_control;
153 int broadcast_neighbor;
154
155 /* 2 bytes of padding : see ether_addr_equal_64bits() */
156 u8 ad_actor_system[ETH_ALEN + 2];
157 };
158
159 struct slave {
160 struct net_device *dev; /* first - useful for panic debug */
161 struct bonding *bond; /* our master */
162 int delay;
163 /* all 4 in jiffies */
164 unsigned long last_link_up;
165 unsigned long last_tx;
166 unsigned long last_rx;
167 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
168 s8 link; /* one of BOND_LINK_XXXX */
169 s8 link_new_state; /* one of BOND_LINK_XXXX */
170 u8 backup:1, /* indicates backup slave. Value corresponds with
171 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
172 inactive:1, /* indicates inactive slave */
173 rx_disabled:1, /* indicates whether slave's Rx is disabled */
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 int prio;
183 struct ad_slave_info *ad_info;
184 struct tlb_slave_info tlb_info;
185 #ifdef CONFIG_NET_POLL_CONTROLLER
186 struct netpoll *np;
187 #endif
188 struct delayed_work notify_work;
189 struct kobject kobj;
190 struct rtnl_link_stats64 slave_stats;
191 };
192
to_slave(struct kobject * kobj)193 static inline struct slave *to_slave(struct kobject *kobj)
194 {
195 return container_of(kobj, struct slave, kobj);
196 }
197
198 struct bond_up_slave {
199 unsigned int count;
200 struct rcu_head rcu;
201 struct slave *arr[];
202 };
203
204 /*
205 * Link pseudo-state only used internally by monitors
206 */
207 #define BOND_LINK_NOCHANGE -1
208
209 struct bond_ipsec {
210 struct list_head list;
211 struct xfrm_state *xs;
212 };
213
214 /*
215 * Here are the locking policies for the two bonding locks:
216 * Get rcu_read_lock when reading or RTNL when writing slave list.
217 */
218 struct bonding {
219 struct net_device *dev; /* first - useful for panic debug */
220 struct slave __rcu *curr_active_slave;
221 struct slave __rcu *current_arp_slave;
222 struct slave __rcu *primary_slave;
223 struct bond_up_slave __rcu *usable_slaves;
224 struct bond_up_slave __rcu *all_slaves;
225 bool force_primary;
226 bool notifier_ctx;
227 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
228 int (*recv_probe)(const struct sk_buff *, struct bonding *,
229 struct slave *);
230 /* mode_lock is used for mode-specific locking needs, currently used by:
231 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
232 * bond_3ad_state_machine_handler() concurrently and also
233 * the access to the state machine shared variables.
234 * TLB mode (5) - to sync the use and modifications of its hash table
235 * ALB mode (6) - to sync the use and modifications of its hash table
236 */
237 spinlock_t mode_lock;
238 spinlock_t stats_lock;
239 u32 send_peer_notif;
240 u8 igmp_retrans;
241 #ifdef CONFIG_PROC_FS
242 struct proc_dir_entry *proc_entry;
243 char proc_file_name[IFNAMSIZ];
244 #endif /* CONFIG_PROC_FS */
245 struct list_head bond_list;
246 u32 __percpu *rr_tx_counter;
247 struct ad_bond_info ad_info;
248 struct alb_bond_info alb_info;
249 struct bond_params params;
250 struct workqueue_struct *wq;
251 struct delayed_work mii_work;
252 struct delayed_work arp_work;
253 struct delayed_work alb_work;
254 struct delayed_work ad_work;
255 struct delayed_work mcast_work;
256 struct delayed_work slave_arr_work;
257 struct delayed_work peer_notify_work;
258 #ifdef CONFIG_DEBUG_FS
259 /* debugging support via debugfs */
260 struct dentry *debug_dir;
261 #endif /* CONFIG_DEBUG_FS */
262 struct rtnl_link_stats64 bond_stats;
263 #ifdef CONFIG_XFRM_OFFLOAD
264 struct list_head ipsec_list;
265 /* protecting ipsec_list */
266 struct mutex ipsec_lock;
267 #endif /* CONFIG_XFRM_OFFLOAD */
268 struct bpf_prog *xdp_prog;
269 };
270
271 #define bond_slave_get_rcu(dev) \
272 ((struct slave *) rcu_dereference(dev->rx_handler_data))
273
274 #define bond_slave_get_rtnl(dev) \
275 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
276
277 void bond_queue_slave_event(struct slave *slave);
278 void bond_lower_state_changed(struct slave *slave);
279
280 struct bond_vlan_tag {
281 __be16 vlan_proto;
282 unsigned short vlan_id;
283 };
284
285 /*
286 * Returns NULL if the net_device does not belong to any of the bond's slaves
287 *
288 * Caller must hold bond lock for read
289 */
bond_get_slave_by_dev(struct bonding * bond,struct net_device * slave_dev)290 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
291 struct net_device *slave_dev)
292 {
293 return netdev_lower_dev_get_private(bond->dev, slave_dev);
294 }
295
bond_get_bond_by_slave(struct slave * slave)296 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
297 {
298 return slave->bond;
299 }
300
bond_should_override_tx_queue(struct bonding * bond)301 static inline bool bond_should_override_tx_queue(struct bonding *bond)
302 {
303 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
304 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
305 }
306
bond_is_lb(const struct bonding * bond)307 static inline bool bond_is_lb(const struct bonding *bond)
308 {
309 return BOND_MODE(bond) == BOND_MODE_TLB ||
310 BOND_MODE(bond) == BOND_MODE_ALB;
311 }
312
bond_needs_speed_duplex(const struct bonding * bond)313 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
314 {
315 return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
316 }
317
bond_is_nondyn_tlb(const struct bonding * bond)318 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
319 {
320 return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
321 }
322
bond_mode_can_use_xmit_hash(const struct bonding * bond)323 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
324 {
325 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
326 BOND_MODE(bond) == BOND_MODE_XOR ||
327 BOND_MODE(bond) == BOND_MODE_TLB ||
328 BOND_MODE(bond) == BOND_MODE_ALB);
329 }
330
bond_mode_uses_xmit_hash(const struct bonding * bond)331 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
332 {
333 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
334 BOND_MODE(bond) == BOND_MODE_XOR ||
335 bond_is_nondyn_tlb(bond));
336 }
337
bond_mode_uses_arp(int mode)338 static inline bool bond_mode_uses_arp(int mode)
339 {
340 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
341 mode != BOND_MODE_ALB;
342 }
343
bond_mode_uses_primary(int mode)344 static inline bool bond_mode_uses_primary(int mode)
345 {
346 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
347 mode == BOND_MODE_ALB;
348 }
349
bond_uses_primary(struct bonding * bond)350 static inline bool bond_uses_primary(struct bonding *bond)
351 {
352 return bond_mode_uses_primary(BOND_MODE(bond));
353 }
354
bond_option_active_slave_get_rcu(struct bonding * bond)355 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
356 {
357 struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
358
359 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
360 }
361
bond_slave_is_up(struct slave * slave)362 static inline bool bond_slave_is_up(struct slave *slave)
363 {
364 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
365 }
366
bond_set_active_slave(struct slave * slave)367 static inline void bond_set_active_slave(struct slave *slave)
368 {
369 if (slave->backup) {
370 slave->backup = 0;
371 bond_queue_slave_event(slave);
372 bond_lower_state_changed(slave);
373 }
374 }
375
bond_set_backup_slave(struct slave * slave)376 static inline void bond_set_backup_slave(struct slave *slave)
377 {
378 if (!slave->backup) {
379 slave->backup = 1;
380 bond_queue_slave_event(slave);
381 bond_lower_state_changed(slave);
382 }
383 }
384
bond_set_slave_state(struct slave * slave,int slave_state,bool notify)385 static inline void bond_set_slave_state(struct slave *slave,
386 int slave_state, bool notify)
387 {
388 if (slave->backup == slave_state)
389 return;
390
391 slave->backup = slave_state;
392 if (notify) {
393 bond_lower_state_changed(slave);
394 bond_queue_slave_event(slave);
395 slave->should_notify = 0;
396 } else {
397 if (slave->should_notify)
398 slave->should_notify = 0;
399 else
400 slave->should_notify = 1;
401 }
402 }
403
bond_slave_state_change(struct bonding * bond)404 static inline void bond_slave_state_change(struct bonding *bond)
405 {
406 struct list_head *iter;
407 struct slave *tmp;
408
409 bond_for_each_slave(bond, tmp, iter) {
410 if (tmp->link == BOND_LINK_UP)
411 bond_set_active_slave(tmp);
412 else if (tmp->link == BOND_LINK_DOWN)
413 bond_set_backup_slave(tmp);
414 }
415 }
416
bond_slave_state_notify(struct bonding * bond)417 static inline void bond_slave_state_notify(struct bonding *bond)
418 {
419 struct list_head *iter;
420 struct slave *tmp;
421
422 bond_for_each_slave(bond, tmp, iter) {
423 if (tmp->should_notify) {
424 bond_lower_state_changed(tmp);
425 tmp->should_notify = 0;
426 }
427 }
428 }
429
bond_slave_state(struct slave * slave)430 static inline int bond_slave_state(struct slave *slave)
431 {
432 return slave->backup;
433 }
434
bond_is_active_slave(struct slave * slave)435 static inline bool bond_is_active_slave(struct slave *slave)
436 {
437 return !bond_slave_state(slave);
438 }
439
bond_slave_can_tx(struct slave * slave)440 static inline bool bond_slave_can_tx(struct slave *slave)
441 {
442 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
443 bond_is_active_slave(slave);
444 }
445
bond_is_active_slave_dev(const struct net_device * slave_dev)446 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
447 {
448 struct slave *slave;
449 bool active;
450
451 rcu_read_lock();
452 slave = bond_slave_get_rcu(slave_dev);
453 active = bond_is_active_slave(slave);
454 rcu_read_unlock();
455
456 return active;
457 }
458
bond_hw_addr_copy(u8 * dst,const u8 * src,unsigned int len)459 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
460 {
461 if (len == ETH_ALEN) {
462 ether_addr_copy(dst, src);
463 return;
464 }
465
466 memcpy(dst, src, len);
467 }
468
469 #define BOND_PRI_RESELECT_ALWAYS 0
470 #define BOND_PRI_RESELECT_BETTER 1
471 #define BOND_PRI_RESELECT_FAILURE 2
472
473 #define BOND_FOM_NONE 0
474 #define BOND_FOM_ACTIVE 1
475 #define BOND_FOM_FOLLOW 2
476
477 #define BOND_ARP_TARGETS_ANY 0
478 #define BOND_ARP_TARGETS_ALL 1
479
480 #define BOND_ARP_VALIDATE_NONE 0
481 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
482 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
483 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
484 BOND_ARP_VALIDATE_BACKUP)
485 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
486 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
487 BOND_ARP_FILTER)
488 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
489 BOND_ARP_FILTER)
490
491 #define BOND_SLAVE_NOTIFY_NOW true
492 #define BOND_SLAVE_NOTIFY_LATER false
493
slave_do_arp_validate(struct bonding * bond,struct slave * slave)494 static inline int slave_do_arp_validate(struct bonding *bond,
495 struct slave *slave)
496 {
497 return bond->params.arp_validate & (1 << bond_slave_state(slave));
498 }
499
slave_do_arp_validate_only(struct bonding * bond)500 static inline int slave_do_arp_validate_only(struct bonding *bond)
501 {
502 return bond->params.arp_validate & BOND_ARP_FILTER;
503 }
504
bond_is_ip_target_ok(__be32 addr)505 static inline int bond_is_ip_target_ok(__be32 addr)
506 {
507 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
508 }
509
510 #if IS_ENABLED(CONFIG_IPV6)
bond_is_ip6_target_ok(struct in6_addr * addr)511 static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
512 {
513 return !ipv6_addr_any(addr) &&
514 !ipv6_addr_loopback(addr) &&
515 !ipv6_addr_is_multicast(addr);
516 }
517 #endif
518
519 /* Get the oldest arp which we've received on this slave for bond's
520 * arp_targets.
521 */
slave_oldest_target_arp_rx(struct bonding * bond,struct slave * slave)522 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
523 struct slave *slave)
524 {
525 unsigned long tmp, ret = READ_ONCE(slave->target_last_arp_rx[0]);
526 int i = 1;
527
528 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++) {
529 tmp = READ_ONCE(slave->target_last_arp_rx[i]);
530 if (time_before(tmp, ret))
531 ret = tmp;
532 }
533 return ret;
534 }
535
slave_last_rx(struct bonding * bond,struct slave * slave)536 static inline unsigned long slave_last_rx(struct bonding *bond,
537 struct slave *slave)
538 {
539 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
540 return slave_oldest_target_arp_rx(bond, slave);
541
542 return READ_ONCE(slave->last_rx);
543 }
544
slave_update_last_tx(struct slave * slave)545 static inline void slave_update_last_tx(struct slave *slave)
546 {
547 WRITE_ONCE(slave->last_tx, jiffies);
548 }
549
slave_last_tx(struct slave * slave)550 static inline unsigned long slave_last_tx(struct slave *slave)
551 {
552 return READ_ONCE(slave->last_tx);
553 }
554
555 #ifdef CONFIG_NET_POLL_CONTROLLER
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)556 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
557 struct sk_buff *skb)
558 {
559 return netpoll_send_skb(slave->np, skb);
560 }
561 #else
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)562 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
563 struct sk_buff *skb)
564 {
565 BUG();
566 return NETDEV_TX_OK;
567 }
568 #endif
569
bond_set_slave_inactive_flags(struct slave * slave,bool notify)570 static inline void bond_set_slave_inactive_flags(struct slave *slave,
571 bool notify)
572 {
573 if (!bond_is_lb(slave->bond))
574 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
575 if (!slave->bond->params.all_slaves_active)
576 slave->inactive = 1;
577 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
578 slave->rx_disabled = 1;
579 }
580
bond_set_slave_tx_disabled_flags(struct slave * slave,bool notify)581 static inline void bond_set_slave_tx_disabled_flags(struct slave *slave,
582 bool notify)
583 {
584 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
585 }
586
bond_set_slave_active_flags(struct slave * slave,bool notify)587 static inline void bond_set_slave_active_flags(struct slave *slave,
588 bool notify)
589 {
590 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
591 slave->inactive = 0;
592 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
593 slave->rx_disabled = 0;
594 }
595
bond_set_slave_rx_enabled_flags(struct slave * slave,bool notify)596 static inline void bond_set_slave_rx_enabled_flags(struct slave *slave,
597 bool notify)
598 {
599 slave->rx_disabled = 0;
600 }
601
bond_is_slave_inactive(struct slave * slave)602 static inline bool bond_is_slave_inactive(struct slave *slave)
603 {
604 return slave->inactive;
605 }
606
bond_is_slave_rx_disabled(struct slave * slave)607 static inline bool bond_is_slave_rx_disabled(struct slave *slave)
608 {
609 return slave->rx_disabled;
610 }
611
bond_propose_link_state(struct slave * slave,int state)612 static inline void bond_propose_link_state(struct slave *slave, int state)
613 {
614 slave->link_new_state = state;
615 }
616
bond_commit_link_state(struct slave * slave,bool notify)617 static inline void bond_commit_link_state(struct slave *slave, bool notify)
618 {
619 if (slave->link_new_state == BOND_LINK_NOCHANGE)
620 return;
621
622 slave->link = slave->link_new_state;
623 if (notify) {
624 bond_queue_slave_event(slave);
625 bond_lower_state_changed(slave);
626 slave->should_notify_link = 0;
627 } else {
628 if (slave->should_notify_link)
629 slave->should_notify_link = 0;
630 else
631 slave->should_notify_link = 1;
632 }
633 }
634
bond_set_slave_link_state(struct slave * slave,int state,bool notify)635 static inline void bond_set_slave_link_state(struct slave *slave, int state,
636 bool notify)
637 {
638 bond_propose_link_state(slave, state);
639 bond_commit_link_state(slave, notify);
640 }
641
bond_slave_link_notify(struct bonding * bond)642 static inline void bond_slave_link_notify(struct bonding *bond)
643 {
644 struct list_head *iter;
645 struct slave *tmp;
646
647 bond_for_each_slave(bond, tmp, iter) {
648 if (tmp->should_notify_link) {
649 bond_queue_slave_event(tmp);
650 bond_lower_state_changed(tmp);
651 tmp->should_notify_link = 0;
652 }
653 }
654 }
655
bond_confirm_addr(struct net_device * dev,__be32 dst,__be32 local)656 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
657 {
658 struct in_device *in_dev;
659 __be32 addr = 0;
660
661 rcu_read_lock();
662 in_dev = __in_dev_get_rcu(dev);
663
664 if (in_dev)
665 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
666 RT_SCOPE_HOST);
667 rcu_read_unlock();
668 return addr;
669 }
670
671 struct bond_net {
672 struct net *net; /* Associated network namespace */
673 struct list_head dev_list;
674 #ifdef CONFIG_PROC_FS
675 struct proc_dir_entry *proc_dir;
676 #endif
677 struct class_attribute class_attr_bonding_masters;
678 };
679
680 int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
681 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
682 int bond_create(struct net *net, const char *name);
683 int bond_create_sysfs(struct bond_net *net);
684 void bond_destroy_sysfs(struct bond_net *net);
685 void bond_prepare_sysfs_group(struct bonding *bond);
686 int bond_sysfs_slave_add(struct slave *slave);
687 void bond_sysfs_slave_del(struct slave *slave);
688 void bond_xdp_set_features(struct net_device *bond_dev);
689 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
690 struct netlink_ext_ack *extack);
691 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
692 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
693 int bond_set_carrier(struct bonding *bond);
694 void bond_select_active_slave(struct bonding *bond);
695 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
696 void bond_create_debugfs(void);
697 void bond_destroy_debugfs(void);
698 void bond_debug_register(struct bonding *bond);
699 void bond_debug_unregister(struct bonding *bond);
700 void bond_debug_reregister(struct bonding *bond);
701 const char *bond_mode_name(int mode);
702 bool __bond_xdp_check(int mode, int xmit_policy);
703 bool bond_xdp_check(struct bonding *bond, int mode);
704 void bond_setup(struct net_device *bond_dev);
705 unsigned int bond_get_num_tx_queues(void);
706 int bond_netlink_init(void);
707 void bond_netlink_fini(void);
708 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
709 const char *bond_slave_link_status(s8 link);
710 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
711 struct net_device *end_dev,
712 int level);
713 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
714 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
715 void bond_peer_notify_work_rearm(struct bonding *bond, unsigned long delay);
716 void bond_work_init_all(struct bonding *bond);
717 void bond_work_cancel_all(struct bonding *bond);
718
719 #ifdef CONFIG_PROC_FS
720 void bond_create_proc_entry(struct bonding *bond);
721 void bond_remove_proc_entry(struct bonding *bond);
722 void bond_create_proc_dir(struct bond_net *bn);
723 void bond_destroy_proc_dir(struct bond_net *bn);
724 #else
bond_create_proc_entry(struct bonding * bond)725 static inline void bond_create_proc_entry(struct bonding *bond)
726 {
727 }
728
bond_remove_proc_entry(struct bonding * bond)729 static inline void bond_remove_proc_entry(struct bonding *bond)
730 {
731 }
732
bond_create_proc_dir(struct bond_net * bn)733 static inline void bond_create_proc_dir(struct bond_net *bn)
734 {
735 }
736
bond_destroy_proc_dir(struct bond_net * bn)737 static inline void bond_destroy_proc_dir(struct bond_net *bn)
738 {
739 }
740 #endif
741
bond_slave_has_mac(struct bonding * bond,const u8 * mac)742 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
743 const u8 *mac)
744 {
745 struct list_head *iter;
746 struct slave *tmp;
747
748 bond_for_each_slave(bond, tmp, iter)
749 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
750 return tmp;
751
752 return NULL;
753 }
754
755 /* Caller must hold rcu_read_lock() for read */
bond_slave_has_mac_rcu(struct bonding * bond,const u8 * mac)756 static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac)
757 {
758 struct list_head *iter;
759 struct slave *tmp;
760
761 bond_for_each_slave_rcu(bond, tmp, iter)
762 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
763 return true;
764 return false;
765 }
766
767 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
768 * Returns -1 if not found, index if found
769 */
bond_get_targets_ip(__be32 * targets,__be32 ip)770 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
771 {
772 int i;
773
774 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
775 if (targets[i] == ip)
776 return i;
777 else if (targets[i] == 0)
778 break;
779
780 return -1;
781 }
782
783 #if IS_ENABLED(CONFIG_IPV6)
bond_get_targets_ip6(struct in6_addr * targets,struct in6_addr * ip)784 static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
785 {
786 struct in6_addr mcaddr;
787 int i;
788
789 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
790 addrconf_addr_solict_mult(&targets[i], &mcaddr);
791 if ((ipv6_addr_equal(&targets[i], ip)) ||
792 (ipv6_addr_equal(&mcaddr, ip)))
793 return i;
794 else if (ipv6_addr_any(&targets[i]))
795 break;
796 }
797
798 return -1;
799 }
800 #endif
801
802 /* exported from bond_main.c */
803 extern unsigned int bond_net_id;
804
805 /* exported from bond_netlink.c */
806 extern struct rtnl_link_ops bond_link_ops;
807
808 /* exported from bond_sysfs_slave.c */
809 extern const struct sysfs_ops slave_sysfs_ops;
810
811 /* exported from bond_3ad.c */
812 extern const u8 lacpdu_mcast_addr[];
813
bond_tx_drop(struct net_device * dev,struct sk_buff * skb)814 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
815 {
816 dev_core_stats_tx_dropped_inc(dev);
817 dev_kfree_skb_any(skb);
818 return NET_XMIT_DROP;
819 }
820
821 #endif /* _NET_BONDING_H */
822