xref: /linux/include/net/bonding.h (revision 0dd5dd63ba91d7bee9d0fbc2a6dc73e595391b4c)
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 struct bond_params {
119 	int mode;
120 	int xmit_policy;
121 	int miimon;
122 	u8 num_peer_notif;
123 	u8 missed_max;
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 #if IS_ENABLED(CONFIG_IPV6)
149 	struct in6_addr ns_targets[BOND_MAX_NS_TARGETS];
150 #endif
151 	int coupled_control;
152 
153 	/* 2 bytes of padding : see ether_addr_equal_64bits() */
154 	u8 ad_actor_system[ETH_ALEN + 2];
155 };
156 
157 struct slave {
158 	struct net_device *dev; /* first - useful for panic debug */
159 	struct bonding *bond; /* our master */
160 	int    delay;
161 	/* all 4 in jiffies */
162 	unsigned long last_link_up;
163 	unsigned long last_tx;
164 	unsigned long last_rx;
165 	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
166 	s8     link;		/* one of BOND_LINK_XXXX */
167 	s8     link_new_state;	/* one of BOND_LINK_XXXX */
168 	u8     backup:1,   /* indicates backup slave. Value corresponds with
169 			      BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
170 	       inactive:1, /* indicates inactive slave */
171 	       rx_disabled:1, /* indicates whether slave's Rx is disabled */
172 	       should_notify:1, /* indicates whether the state changed */
173 	       should_notify_link:1; /* indicates whether the link changed */
174 	u8     duplex;
175 	u32    original_mtu;
176 	u32    link_failure_count;
177 	u32    speed;
178 	u16    queue_id;
179 	u8     perm_hwaddr[MAX_ADDR_LEN];
180 	int    prio;
181 	struct ad_slave_info *ad_info;
182 	struct tlb_slave_info tlb_info;
183 #ifdef CONFIG_NET_POLL_CONTROLLER
184 	struct netpoll *np;
185 #endif
186 	struct delayed_work notify_work;
187 	struct kobject kobj;
188 	struct rtnl_link_stats64 slave_stats;
189 };
190 
to_slave(struct kobject * kobj)191 static inline struct slave *to_slave(struct kobject *kobj)
192 {
193 	return container_of(kobj, struct slave, kobj);
194 }
195 
196 struct bond_up_slave {
197 	unsigned int	count;
198 	struct rcu_head rcu;
199 	struct slave	*arr[];
200 };
201 
202 /*
203  * Link pseudo-state only used internally by monitors
204  */
205 #define BOND_LINK_NOCHANGE -1
206 
207 struct bond_ipsec {
208 	struct list_head list;
209 	struct xfrm_state *xs;
210 };
211 
212 /*
213  * Here are the locking policies for the two bonding locks:
214  * Get rcu_read_lock when reading or RTNL when writing slave list.
215  */
216 struct bonding {
217 	struct   net_device *dev; /* first - useful for panic debug */
218 	struct   slave __rcu *curr_active_slave;
219 	struct   slave __rcu *current_arp_slave;
220 	struct   slave __rcu *primary_slave;
221 	struct   bond_up_slave __rcu *usable_slaves;
222 	struct   bond_up_slave __rcu *all_slaves;
223 	bool     force_primary;
224 	bool     notifier_ctx;
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 	u32	 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 	struct mutex 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 /*
283  * Returns NULL if the net_device does not belong to any of the bond's slaves
284  *
285  * Caller must hold bond lock for read
286  */
bond_get_slave_by_dev(struct bonding * bond,struct net_device * slave_dev)287 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
288 						  struct net_device *slave_dev)
289 {
290 	return netdev_lower_dev_get_private(bond->dev, slave_dev);
291 }
292 
bond_get_bond_by_slave(struct slave * slave)293 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
294 {
295 	return slave->bond;
296 }
297 
bond_should_override_tx_queue(struct bonding * bond)298 static inline bool bond_should_override_tx_queue(struct bonding *bond)
299 {
300 	return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
301 	       BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
302 }
303 
bond_is_lb(const struct bonding * bond)304 static inline bool bond_is_lb(const struct bonding *bond)
305 {
306 	return BOND_MODE(bond) == BOND_MODE_TLB ||
307 	       BOND_MODE(bond) == BOND_MODE_ALB;
308 }
309 
bond_needs_speed_duplex(const struct bonding * bond)310 static inline bool bond_needs_speed_duplex(const struct bonding *bond)
311 {
312 	return BOND_MODE(bond) == BOND_MODE_8023AD || bond_is_lb(bond);
313 }
314 
bond_is_nondyn_tlb(const struct bonding * bond)315 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
316 {
317 	return (bond_is_lb(bond) && bond->params.tlb_dynamic_lb == 0);
318 }
319 
bond_mode_can_use_xmit_hash(const struct bonding * bond)320 static inline bool bond_mode_can_use_xmit_hash(const struct bonding *bond)
321 {
322 	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
323 		BOND_MODE(bond) == BOND_MODE_XOR ||
324 		BOND_MODE(bond) == BOND_MODE_TLB ||
325 		BOND_MODE(bond) == BOND_MODE_ALB);
326 }
327 
bond_mode_uses_xmit_hash(const struct bonding * bond)328 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
329 {
330 	return (BOND_MODE(bond) == BOND_MODE_8023AD ||
331 		BOND_MODE(bond) == BOND_MODE_XOR ||
332 		bond_is_nondyn_tlb(bond));
333 }
334 
bond_mode_uses_arp(int mode)335 static inline bool bond_mode_uses_arp(int mode)
336 {
337 	return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
338 	       mode != BOND_MODE_ALB;
339 }
340 
bond_mode_uses_primary(int mode)341 static inline bool bond_mode_uses_primary(int mode)
342 {
343 	return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
344 	       mode == BOND_MODE_ALB;
345 }
346 
bond_uses_primary(struct bonding * bond)347 static inline bool bond_uses_primary(struct bonding *bond)
348 {
349 	return bond_mode_uses_primary(BOND_MODE(bond));
350 }
351 
bond_option_active_slave_get_rcu(struct bonding * bond)352 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
353 {
354 	struct slave *slave = rcu_dereference_rtnl(bond->curr_active_slave);
355 
356 	return bond_uses_primary(bond) && slave ? slave->dev : NULL;
357 }
358 
bond_slave_is_up(struct slave * slave)359 static inline bool bond_slave_is_up(struct slave *slave)
360 {
361 	return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
362 }
363 
bond_set_active_slave(struct slave * slave)364 static inline void bond_set_active_slave(struct slave *slave)
365 {
366 	if (slave->backup) {
367 		slave->backup = 0;
368 		bond_queue_slave_event(slave);
369 		bond_lower_state_changed(slave);
370 	}
371 }
372 
bond_set_backup_slave(struct slave * slave)373 static inline void bond_set_backup_slave(struct slave *slave)
374 {
375 	if (!slave->backup) {
376 		slave->backup = 1;
377 		bond_queue_slave_event(slave);
378 		bond_lower_state_changed(slave);
379 	}
380 }
381 
bond_set_slave_state(struct slave * slave,int slave_state,bool notify)382 static inline void bond_set_slave_state(struct slave *slave,
383 					int slave_state, bool notify)
384 {
385 	if (slave->backup == slave_state)
386 		return;
387 
388 	slave->backup = slave_state;
389 	if (notify) {
390 		bond_lower_state_changed(slave);
391 		bond_queue_slave_event(slave);
392 		slave->should_notify = 0;
393 	} else {
394 		if (slave->should_notify)
395 			slave->should_notify = 0;
396 		else
397 			slave->should_notify = 1;
398 	}
399 }
400 
bond_slave_state_change(struct bonding * bond)401 static inline void bond_slave_state_change(struct bonding *bond)
402 {
403 	struct list_head *iter;
404 	struct slave *tmp;
405 
406 	bond_for_each_slave(bond, tmp, iter) {
407 		if (tmp->link == BOND_LINK_UP)
408 			bond_set_active_slave(tmp);
409 		else if (tmp->link == BOND_LINK_DOWN)
410 			bond_set_backup_slave(tmp);
411 	}
412 }
413 
bond_slave_state_notify(struct bonding * bond)414 static inline void bond_slave_state_notify(struct bonding *bond)
415 {
416 	struct list_head *iter;
417 	struct slave *tmp;
418 
419 	bond_for_each_slave(bond, tmp, iter) {
420 		if (tmp->should_notify) {
421 			bond_lower_state_changed(tmp);
422 			tmp->should_notify = 0;
423 		}
424 	}
425 }
426 
bond_slave_state(struct slave * slave)427 static inline int bond_slave_state(struct slave *slave)
428 {
429 	return slave->backup;
430 }
431 
bond_is_active_slave(struct slave * slave)432 static inline bool bond_is_active_slave(struct slave *slave)
433 {
434 	return !bond_slave_state(slave);
435 }
436 
bond_slave_can_tx(struct slave * slave)437 static inline bool bond_slave_can_tx(struct slave *slave)
438 {
439 	return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
440 	       bond_is_active_slave(slave);
441 }
442 
bond_is_active_slave_dev(const struct net_device * slave_dev)443 static inline bool bond_is_active_slave_dev(const struct net_device *slave_dev)
444 {
445 	struct slave *slave;
446 	bool active;
447 
448 	rcu_read_lock();
449 	slave = bond_slave_get_rcu(slave_dev);
450 	active = bond_is_active_slave(slave);
451 	rcu_read_unlock();
452 
453 	return active;
454 }
455 
bond_hw_addr_copy(u8 * dst,const u8 * src,unsigned int len)456 static inline void bond_hw_addr_copy(u8 *dst, const u8 *src, unsigned int len)
457 {
458 	if (len == ETH_ALEN) {
459 		ether_addr_copy(dst, src);
460 		return;
461 	}
462 
463 	memcpy(dst, src, len);
464 }
465 
466 #define BOND_PRI_RESELECT_ALWAYS	0
467 #define BOND_PRI_RESELECT_BETTER	1
468 #define BOND_PRI_RESELECT_FAILURE	2
469 
470 #define BOND_FOM_NONE			0
471 #define BOND_FOM_ACTIVE			1
472 #define BOND_FOM_FOLLOW			2
473 
474 #define BOND_ARP_TARGETS_ANY		0
475 #define BOND_ARP_TARGETS_ALL		1
476 
477 #define BOND_ARP_VALIDATE_NONE		0
478 #define BOND_ARP_VALIDATE_ACTIVE	(1 << BOND_STATE_ACTIVE)
479 #define BOND_ARP_VALIDATE_BACKUP	(1 << BOND_STATE_BACKUP)
480 #define BOND_ARP_VALIDATE_ALL		(BOND_ARP_VALIDATE_ACTIVE | \
481 					 BOND_ARP_VALIDATE_BACKUP)
482 #define BOND_ARP_FILTER			(BOND_ARP_VALIDATE_ALL + 1)
483 #define BOND_ARP_FILTER_ACTIVE		(BOND_ARP_VALIDATE_ACTIVE | \
484 					 BOND_ARP_FILTER)
485 #define BOND_ARP_FILTER_BACKUP		(BOND_ARP_VALIDATE_BACKUP | \
486 					 BOND_ARP_FILTER)
487 
488 #define BOND_SLAVE_NOTIFY_NOW		true
489 #define BOND_SLAVE_NOTIFY_LATER		false
490 
slave_do_arp_validate(struct bonding * bond,struct slave * slave)491 static inline int slave_do_arp_validate(struct bonding *bond,
492 					struct slave *slave)
493 {
494 	return bond->params.arp_validate & (1 << bond_slave_state(slave));
495 }
496 
slave_do_arp_validate_only(struct bonding * bond)497 static inline int slave_do_arp_validate_only(struct bonding *bond)
498 {
499 	return bond->params.arp_validate & BOND_ARP_FILTER;
500 }
501 
bond_is_ip_target_ok(__be32 addr)502 static inline int bond_is_ip_target_ok(__be32 addr)
503 {
504 	return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
505 }
506 
507 #if IS_ENABLED(CONFIG_IPV6)
bond_is_ip6_target_ok(struct in6_addr * addr)508 static inline int bond_is_ip6_target_ok(struct in6_addr *addr)
509 {
510 	return !ipv6_addr_any(addr) &&
511 	       !ipv6_addr_loopback(addr) &&
512 	       !ipv6_addr_is_multicast(addr);
513 }
514 #endif
515 
516 /* Get the oldest arp which we've received on this slave for bond's
517  * arp_targets.
518  */
slave_oldest_target_arp_rx(struct bonding * bond,struct slave * slave)519 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
520 						       struct slave *slave)
521 {
522 	int i = 1;
523 	unsigned long ret = slave->target_last_arp_rx[0];
524 
525 	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
526 		if (time_before(slave->target_last_arp_rx[i], ret))
527 			ret = slave->target_last_arp_rx[i];
528 
529 	return ret;
530 }
531 
slave_last_rx(struct bonding * bond,struct slave * slave)532 static inline unsigned long slave_last_rx(struct bonding *bond,
533 					struct slave *slave)
534 {
535 	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
536 		return slave_oldest_target_arp_rx(bond, slave);
537 
538 	return slave->last_rx;
539 }
540 
slave_update_last_tx(struct slave * slave)541 static inline void slave_update_last_tx(struct slave *slave)
542 {
543 	WRITE_ONCE(slave->last_tx, jiffies);
544 }
545 
slave_last_tx(struct slave * slave)546 static inline unsigned long slave_last_tx(struct slave *slave)
547 {
548 	return READ_ONCE(slave->last_tx);
549 }
550 
551 #ifdef CONFIG_NET_POLL_CONTROLLER
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)552 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
553 					 struct sk_buff *skb)
554 {
555 	return netpoll_send_skb(slave->np, skb);
556 }
557 #else
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)558 static inline netdev_tx_t bond_netpoll_send_skb(const struct slave *slave,
559 					 struct sk_buff *skb)
560 {
561 	BUG();
562 	return NETDEV_TX_OK;
563 }
564 #endif
565 
bond_set_slave_inactive_flags(struct slave * slave,bool notify)566 static inline void bond_set_slave_inactive_flags(struct slave *slave,
567 						 bool notify)
568 {
569 	if (!bond_is_lb(slave->bond))
570 		bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
571 	if (!slave->bond->params.all_slaves_active)
572 		slave->inactive = 1;
573 	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
574 		slave->rx_disabled = 1;
575 }
576 
bond_set_slave_tx_disabled_flags(struct slave * slave,bool notify)577 static inline void bond_set_slave_tx_disabled_flags(struct slave *slave,
578 						 bool notify)
579 {
580 	bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
581 }
582 
bond_set_slave_active_flags(struct slave * slave,bool notify)583 static inline void bond_set_slave_active_flags(struct slave *slave,
584 					       bool notify)
585 {
586 	bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
587 	slave->inactive = 0;
588 	if (BOND_MODE(slave->bond) == BOND_MODE_8023AD)
589 		slave->rx_disabled = 0;
590 }
591 
bond_set_slave_rx_enabled_flags(struct slave * slave,bool notify)592 static inline void bond_set_slave_rx_enabled_flags(struct slave *slave,
593 					       bool notify)
594 {
595 	slave->rx_disabled = 0;
596 }
597 
bond_is_slave_inactive(struct slave * slave)598 static inline bool bond_is_slave_inactive(struct slave *slave)
599 {
600 	return slave->inactive;
601 }
602 
bond_is_slave_rx_disabled(struct slave * slave)603 static inline bool bond_is_slave_rx_disabled(struct slave *slave)
604 {
605 	return slave->rx_disabled;
606 }
607 
bond_propose_link_state(struct slave * slave,int state)608 static inline void bond_propose_link_state(struct slave *slave, int state)
609 {
610 	slave->link_new_state = state;
611 }
612 
bond_commit_link_state(struct slave * slave,bool notify)613 static inline void bond_commit_link_state(struct slave *slave, bool notify)
614 {
615 	if (slave->link_new_state == BOND_LINK_NOCHANGE)
616 		return;
617 
618 	slave->link = slave->link_new_state;
619 	if (notify) {
620 		bond_queue_slave_event(slave);
621 		bond_lower_state_changed(slave);
622 		slave->should_notify_link = 0;
623 	} else {
624 		if (slave->should_notify_link)
625 			slave->should_notify_link = 0;
626 		else
627 			slave->should_notify_link = 1;
628 	}
629 }
630 
bond_set_slave_link_state(struct slave * slave,int state,bool notify)631 static inline void bond_set_slave_link_state(struct slave *slave, int state,
632 					     bool notify)
633 {
634 	bond_propose_link_state(slave, state);
635 	bond_commit_link_state(slave, notify);
636 }
637 
bond_slave_link_notify(struct bonding * bond)638 static inline void bond_slave_link_notify(struct bonding *bond)
639 {
640 	struct list_head *iter;
641 	struct slave *tmp;
642 
643 	bond_for_each_slave(bond, tmp, iter) {
644 		if (tmp->should_notify_link) {
645 			bond_queue_slave_event(tmp);
646 			bond_lower_state_changed(tmp);
647 			tmp->should_notify_link = 0;
648 		}
649 	}
650 }
651 
bond_confirm_addr(struct net_device * dev,__be32 dst,__be32 local)652 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
653 {
654 	struct in_device *in_dev;
655 	__be32 addr = 0;
656 
657 	rcu_read_lock();
658 	in_dev = __in_dev_get_rcu(dev);
659 
660 	if (in_dev)
661 		addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
662 					 RT_SCOPE_HOST);
663 	rcu_read_unlock();
664 	return addr;
665 }
666 
667 struct bond_net {
668 	struct net		*net;	/* Associated network namespace */
669 	struct list_head	dev_list;
670 #ifdef CONFIG_PROC_FS
671 	struct proc_dir_entry	*proc_dir;
672 #endif
673 	struct class_attribute	class_attr_bonding_masters;
674 };
675 
676 int bond_rcv_validate(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
677 netdev_tx_t bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
678 int bond_create(struct net *net, const char *name);
679 int bond_create_sysfs(struct bond_net *net);
680 void bond_destroy_sysfs(struct bond_net *net);
681 void bond_prepare_sysfs_group(struct bonding *bond);
682 int bond_sysfs_slave_add(struct slave *slave);
683 void bond_sysfs_slave_del(struct slave *slave);
684 void bond_xdp_set_features(struct net_device *bond_dev);
685 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev,
686 		 struct netlink_ext_ack *extack);
687 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
688 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
689 int bond_set_carrier(struct bonding *bond);
690 void bond_select_active_slave(struct bonding *bond);
691 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
692 void bond_create_debugfs(void);
693 void bond_destroy_debugfs(void);
694 void bond_debug_register(struct bonding *bond);
695 void bond_debug_unregister(struct bonding *bond);
696 void bond_debug_reregister(struct bonding *bond);
697 const char *bond_mode_name(int mode);
698 void bond_setup(struct net_device *bond_dev);
699 unsigned int bond_get_num_tx_queues(void);
700 int bond_netlink_init(void);
701 void bond_netlink_fini(void);
702 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
703 const char *bond_slave_link_status(s8 link);
704 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
705 					      struct net_device *end_dev,
706 					      int level);
707 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
708 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
709 void bond_work_init_all(struct bonding *bond);
710 
711 #ifdef CONFIG_PROC_FS
712 void bond_create_proc_entry(struct bonding *bond);
713 void bond_remove_proc_entry(struct bonding *bond);
714 void bond_create_proc_dir(struct bond_net *bn);
715 void bond_destroy_proc_dir(struct bond_net *bn);
716 #else
bond_create_proc_entry(struct bonding * bond)717 static inline void bond_create_proc_entry(struct bonding *bond)
718 {
719 }
720 
bond_remove_proc_entry(struct bonding * bond)721 static inline void bond_remove_proc_entry(struct bonding *bond)
722 {
723 }
724 
bond_create_proc_dir(struct bond_net * bn)725 static inline void bond_create_proc_dir(struct bond_net *bn)
726 {
727 }
728 
bond_destroy_proc_dir(struct bond_net * bn)729 static inline void bond_destroy_proc_dir(struct bond_net *bn)
730 {
731 }
732 #endif
733 
bond_slave_has_mac(struct bonding * bond,const u8 * mac)734 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
735 					       const u8 *mac)
736 {
737 	struct list_head *iter;
738 	struct slave *tmp;
739 
740 	bond_for_each_slave(bond, tmp, iter)
741 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
742 			return tmp;
743 
744 	return NULL;
745 }
746 
747 /* Caller must hold rcu_read_lock() for read */
bond_slave_has_mac_rcu(struct bonding * bond,const u8 * mac)748 static inline bool bond_slave_has_mac_rcu(struct bonding *bond, const u8 *mac)
749 {
750 	struct list_head *iter;
751 	struct slave *tmp;
752 
753 	bond_for_each_slave_rcu(bond, tmp, iter)
754 		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
755 			return true;
756 	return false;
757 }
758 
759 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
760  * Returns -1 if not found, index if found
761  */
bond_get_targets_ip(__be32 * targets,__be32 ip)762 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
763 {
764 	int i;
765 
766 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
767 		if (targets[i] == ip)
768 			return i;
769 		else if (targets[i] == 0)
770 			break;
771 
772 	return -1;
773 }
774 
775 #if IS_ENABLED(CONFIG_IPV6)
bond_get_targets_ip6(struct in6_addr * targets,struct in6_addr * ip)776 static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip)
777 {
778 	struct in6_addr mcaddr;
779 	int i;
780 
781 	for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
782 		addrconf_addr_solict_mult(&targets[i], &mcaddr);
783 		if ((ipv6_addr_equal(&targets[i], ip)) ||
784 		    (ipv6_addr_equal(&mcaddr, ip)))
785 			return i;
786 		else if (ipv6_addr_any(&targets[i]))
787 			break;
788 	}
789 
790 	return -1;
791 }
792 #endif
793 
794 /* exported from bond_main.c */
795 extern unsigned int bond_net_id;
796 
797 /* exported from bond_netlink.c */
798 extern struct rtnl_link_ops bond_link_ops;
799 
800 /* exported from bond_sysfs_slave.c */
801 extern const struct sysfs_ops slave_sysfs_ops;
802 
803 /* exported from bond_3ad.c */
804 extern const u8 lacpdu_mcast_addr[];
805 
bond_tx_drop(struct net_device * dev,struct sk_buff * skb)806 static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
807 {
808 	dev_core_stats_tx_dropped_inc(dev);
809 	dev_kfree_skb_any(skb);
810 	return NET_XMIT_DROP;
811 }
812 
813 #endif /* _NET_BONDING_H */
814