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
33 #define BOND_MAX_ARP_TARGETS 16
34
35 #define BOND_DEFAULT_MIIMON 100
36
37 /*
38 * Less bad way to call ioctl from within the kernel; this needs to be
39 * done some other way to get the call out of interrupt context.
40 * Needs "ioctl" variable to be supplied by calling context.
41 */
42 #define IOCTL(dev, arg, cmd) ({ \
43 int res = 0; \
44 mm_segment_t fs = get_fs(); \
45 set_fs(get_ds()); \
46 res = ioctl(dev, arg, cmd); \
47 set_fs(fs); \
48 res; })
49
50 #define BOND_MODE(bond) ((bond)->params.mode)
51
52 /* slave list primitives */
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 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
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 /* Caller must have rcu_read_lock */
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 * bond_for_each_slave - iterate over all slaves
76 * @bond: the bond holding this list
77 * @pos: current slave
78 * @iter: list_head * iterator
79 *
80 * Caller must hold RTNL
81 */
82 #define bond_for_each_slave(bond, pos, iter) \
83 netdev_for_each_lower_private((bond)->dev, pos, iter)
84
85 /* Caller must have rcu_read_lock */
86 #define bond_for_each_slave_rcu(bond, pos, iter) \
87 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
88
89 #ifdef CONFIG_NET_POLL_CONTROLLER
90 extern atomic_t netpoll_block_tx;
91
block_netpoll_tx(void)92 static inline void block_netpoll_tx(void)
93 {
94 atomic_inc(&netpoll_block_tx);
95 }
96
unblock_netpoll_tx(void)97 static inline void unblock_netpoll_tx(void)
98 {
99 atomic_dec(&netpoll_block_tx);
100 }
101
is_netpoll_tx_blocked(struct net_device * dev)102 static inline int is_netpoll_tx_blocked(struct net_device *dev)
103 {
104 if (unlikely(netpoll_tx_running(dev)))
105 return atomic_read(&netpoll_block_tx);
106 return 0;
107 }
108 #else
109 #define block_netpoll_tx()
110 #define unblock_netpoll_tx()
111 #define is_netpoll_tx_blocked(dev) (0)
112 #endif
113
114 struct bond_params {
115 int mode;
116 int xmit_policy;
117 int miimon;
118 u8 num_peer_notif;
119 int arp_interval;
120 int arp_validate;
121 int arp_all_targets;
122 int use_carrier;
123 int fail_over_mac;
124 int updelay;
125 int downdelay;
126 int lacp_fast;
127 unsigned int min_links;
128 int ad_select;
129 char primary[IFNAMSIZ];
130 int primary_reselect;
131 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
132 int tx_queues;
133 int all_slaves_active;
134 int resend_igmp;
135 int lp_interval;
136 int packets_per_slave;
137 int tlb_dynamic_lb;
138 struct reciprocal_value reciprocal_packets_per_slave;
139 u16 ad_actor_sys_prio;
140 u16 ad_user_port_key;
141 u8 ad_actor_system[ETH_ALEN];
142 };
143
144 struct bond_parm_tbl {
145 char *modename;
146 int mode;
147 };
148
149 struct netdev_notify_work {
150 struct delayed_work work;
151 struct net_device *dev;
152 struct netdev_bonding_info bonding_info;
153 };
154
155 struct slave {
156 struct net_device *dev; /* first - useful for panic debug */
157 struct bonding *bond; /* our master */
158 int delay;
159 /* all three in jiffies */
160 unsigned long last_link_up;
161 unsigned long last_rx;
162 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
163 s8 link; /* one of BOND_LINK_XXXX */
164 s8 new_link;
165 u8 backup:1, /* indicates backup slave. Value corresponds with
166 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
167 inactive:1, /* indicates inactive slave */
168 should_notify:1; /* indicateds whether the state changed */
169 u8 duplex;
170 u32 original_mtu;
171 u32 link_failure_count;
172 u32 speed;
173 u16 queue_id;
174 u8 perm_hwaddr[ETH_ALEN];
175 struct ad_slave_info *ad_info;
176 struct tlb_slave_info tlb_info;
177 #ifdef CONFIG_NET_POLL_CONTROLLER
178 struct netpoll *np;
179 #endif
180 struct kobject kobj;
181 struct rtnl_link_stats64 slave_stats;
182 };
183
184 struct bond_up_slave {
185 unsigned int count;
186 struct rcu_head rcu;
187 struct slave *arr[0];
188 };
189
190 /*
191 * Link pseudo-state only used internally by monitors
192 */
193 #define BOND_LINK_NOCHANGE -1
194
195 /*
196 * Here are the locking policies for the two bonding locks:
197 * Get rcu_read_lock when reading or RTNL when writing slave list.
198 */
199 struct bonding {
200 struct net_device *dev; /* first - useful for panic debug */
201 struct slave __rcu *curr_active_slave;
202 struct slave __rcu *current_arp_slave;
203 struct slave __rcu *primary_slave;
204 struct bond_up_slave __rcu *slave_arr; /* Array of usable slaves */
205 bool force_primary;
206 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
207 int (*recv_probe)(const struct sk_buff *, struct bonding *,
208 struct slave *);
209 /* mode_lock is used for mode-specific locking needs, currently used by:
210 * 3ad mode (4) - protect against running bond_3ad_unbind_slave() and
211 * bond_3ad_state_machine_handler() concurrently and also
212 * the access to the state machine shared variables.
213 * TLB mode (5) - to sync the use and modifications of its hash table
214 * ALB mode (6) - to sync the use and modifications of its hash table
215 */
216 spinlock_t mode_lock;
217 spinlock_t stats_lock;
218 u8 send_peer_notif;
219 u8 igmp_retrans;
220 #ifdef CONFIG_PROC_FS
221 struct proc_dir_entry *proc_entry;
222 char proc_file_name[IFNAMSIZ];
223 #endif /* CONFIG_PROC_FS */
224 struct list_head bond_list;
225 u32 rr_tx_counter;
226 struct ad_bond_info ad_info;
227 struct alb_bond_info alb_info;
228 struct bond_params params;
229 struct workqueue_struct *wq;
230 struct delayed_work mii_work;
231 struct delayed_work arp_work;
232 struct delayed_work alb_work;
233 struct delayed_work ad_work;
234 struct delayed_work mcast_work;
235 struct delayed_work slave_arr_work;
236 #ifdef CONFIG_DEBUG_FS
237 /* debugging support via debugfs */
238 struct dentry *debug_dir;
239 #endif /* CONFIG_DEBUG_FS */
240 struct rtnl_link_stats64 bond_stats;
241 };
242
243 #define bond_slave_get_rcu(dev) \
244 ((struct slave *) rcu_dereference(dev->rx_handler_data))
245
246 #define bond_slave_get_rtnl(dev) \
247 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
248
249 void bond_queue_slave_event(struct slave *slave);
250
251 struct bond_vlan_tag {
252 __be16 vlan_proto;
253 unsigned short vlan_id;
254 };
255
256 /**
257 * Returns NULL if the net_device does not belong to any of the bond's slaves
258 *
259 * Caller must hold bond lock for read
260 */
bond_get_slave_by_dev(struct bonding * bond,struct net_device * slave_dev)261 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
262 struct net_device *slave_dev)
263 {
264 return netdev_lower_dev_get_private(bond->dev, slave_dev);
265 }
266
bond_get_bond_by_slave(struct slave * slave)267 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
268 {
269 return slave->bond;
270 }
271
bond_should_override_tx_queue(struct bonding * bond)272 static inline bool bond_should_override_tx_queue(struct bonding *bond)
273 {
274 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
275 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN;
276 }
277
bond_is_lb(const struct bonding * bond)278 static inline bool bond_is_lb(const struct bonding *bond)
279 {
280 return BOND_MODE(bond) == BOND_MODE_TLB ||
281 BOND_MODE(bond) == BOND_MODE_ALB;
282 }
283
bond_is_nondyn_tlb(const struct bonding * bond)284 static inline bool bond_is_nondyn_tlb(const struct bonding *bond)
285 {
286 return (BOND_MODE(bond) == BOND_MODE_TLB) &&
287 (bond->params.tlb_dynamic_lb == 0);
288 }
289
bond_mode_uses_xmit_hash(const struct bonding * bond)290 static inline bool bond_mode_uses_xmit_hash(const struct bonding *bond)
291 {
292 return (BOND_MODE(bond) == BOND_MODE_8023AD ||
293 BOND_MODE(bond) == BOND_MODE_XOR ||
294 bond_is_nondyn_tlb(bond));
295 }
296
bond_mode_uses_arp(int mode)297 static inline bool bond_mode_uses_arp(int mode)
298 {
299 return mode != BOND_MODE_8023AD && mode != BOND_MODE_TLB &&
300 mode != BOND_MODE_ALB;
301 }
302
bond_mode_uses_primary(int mode)303 static inline bool bond_mode_uses_primary(int mode)
304 {
305 return mode == BOND_MODE_ACTIVEBACKUP || mode == BOND_MODE_TLB ||
306 mode == BOND_MODE_ALB;
307 }
308
bond_uses_primary(struct bonding * bond)309 static inline bool bond_uses_primary(struct bonding *bond)
310 {
311 return bond_mode_uses_primary(BOND_MODE(bond));
312 }
313
bond_option_active_slave_get_rcu(struct bonding * bond)314 static inline struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
315 {
316 struct slave *slave = rcu_dereference(bond->curr_active_slave);
317
318 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
319 }
320
bond_slave_is_up(struct slave * slave)321 static inline bool bond_slave_is_up(struct slave *slave)
322 {
323 return netif_running(slave->dev) && netif_carrier_ok(slave->dev);
324 }
325
bond_set_active_slave(struct slave * slave)326 static inline void bond_set_active_slave(struct slave *slave)
327 {
328 if (slave->backup) {
329 slave->backup = 0;
330 bond_queue_slave_event(slave);
331 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
332 }
333 }
334
bond_set_backup_slave(struct slave * slave)335 static inline void bond_set_backup_slave(struct slave *slave)
336 {
337 if (!slave->backup) {
338 slave->backup = 1;
339 bond_queue_slave_event(slave);
340 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
341 }
342 }
343
bond_set_slave_state(struct slave * slave,int slave_state,bool notify)344 static inline void bond_set_slave_state(struct slave *slave,
345 int slave_state, bool notify)
346 {
347 if (slave->backup == slave_state)
348 return;
349
350 slave->backup = slave_state;
351 if (notify) {
352 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_ATOMIC);
353 bond_queue_slave_event(slave);
354 slave->should_notify = 0;
355 } else {
356 if (slave->should_notify)
357 slave->should_notify = 0;
358 else
359 slave->should_notify = 1;
360 }
361 }
362
bond_slave_state_change(struct bonding * bond)363 static inline void bond_slave_state_change(struct bonding *bond)
364 {
365 struct list_head *iter;
366 struct slave *tmp;
367
368 bond_for_each_slave(bond, tmp, iter) {
369 if (tmp->link == BOND_LINK_UP)
370 bond_set_active_slave(tmp);
371 else if (tmp->link == BOND_LINK_DOWN)
372 bond_set_backup_slave(tmp);
373 }
374 }
375
bond_slave_state_notify(struct bonding * bond)376 static inline void bond_slave_state_notify(struct bonding *bond)
377 {
378 struct list_head *iter;
379 struct slave *tmp;
380
381 bond_for_each_slave(bond, tmp, iter) {
382 if (tmp->should_notify) {
383 rtmsg_ifinfo(RTM_NEWLINK, tmp->dev, 0, GFP_ATOMIC);
384 tmp->should_notify = 0;
385 }
386 }
387 }
388
bond_slave_state(struct slave * slave)389 static inline int bond_slave_state(struct slave *slave)
390 {
391 return slave->backup;
392 }
393
bond_is_active_slave(struct slave * slave)394 static inline bool bond_is_active_slave(struct slave *slave)
395 {
396 return !bond_slave_state(slave);
397 }
398
bond_slave_can_tx(struct slave * slave)399 static inline bool bond_slave_can_tx(struct slave *slave)
400 {
401 return bond_slave_is_up(slave) && slave->link == BOND_LINK_UP &&
402 bond_is_active_slave(slave);
403 }
404
405 #define BOND_PRI_RESELECT_ALWAYS 0
406 #define BOND_PRI_RESELECT_BETTER 1
407 #define BOND_PRI_RESELECT_FAILURE 2
408
409 #define BOND_FOM_NONE 0
410 #define BOND_FOM_ACTIVE 1
411 #define BOND_FOM_FOLLOW 2
412
413 #define BOND_ARP_TARGETS_ANY 0
414 #define BOND_ARP_TARGETS_ALL 1
415
416 #define BOND_ARP_VALIDATE_NONE 0
417 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
418 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
419 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
420 BOND_ARP_VALIDATE_BACKUP)
421 #define BOND_ARP_FILTER (BOND_ARP_VALIDATE_ALL + 1)
422 #define BOND_ARP_FILTER_ACTIVE (BOND_ARP_VALIDATE_ACTIVE | \
423 BOND_ARP_FILTER)
424 #define BOND_ARP_FILTER_BACKUP (BOND_ARP_VALIDATE_BACKUP | \
425 BOND_ARP_FILTER)
426
427 #define BOND_SLAVE_NOTIFY_NOW true
428 #define BOND_SLAVE_NOTIFY_LATER false
429
slave_do_arp_validate(struct bonding * bond,struct slave * slave)430 static inline int slave_do_arp_validate(struct bonding *bond,
431 struct slave *slave)
432 {
433 return bond->params.arp_validate & (1 << bond_slave_state(slave));
434 }
435
slave_do_arp_validate_only(struct bonding * bond)436 static inline int slave_do_arp_validate_only(struct bonding *bond)
437 {
438 return bond->params.arp_validate & BOND_ARP_FILTER;
439 }
440
bond_is_ip_target_ok(__be32 addr)441 static inline int bond_is_ip_target_ok(__be32 addr)
442 {
443 return !ipv4_is_lbcast(addr) && !ipv4_is_zeronet(addr);
444 }
445
446 /* Get the oldest arp which we've received on this slave for bond's
447 * arp_targets.
448 */
slave_oldest_target_arp_rx(struct bonding * bond,struct slave * slave)449 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
450 struct slave *slave)
451 {
452 int i = 1;
453 unsigned long ret = slave->target_last_arp_rx[0];
454
455 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
456 if (time_before(slave->target_last_arp_rx[i], ret))
457 ret = slave->target_last_arp_rx[i];
458
459 return ret;
460 }
461
slave_last_rx(struct bonding * bond,struct slave * slave)462 static inline unsigned long slave_last_rx(struct bonding *bond,
463 struct slave *slave)
464 {
465 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
466 return slave_oldest_target_arp_rx(bond, slave);
467
468 return slave->last_rx;
469 }
470
471 #ifdef CONFIG_NET_POLL_CONTROLLER
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)472 static inline void bond_netpoll_send_skb(const struct slave *slave,
473 struct sk_buff *skb)
474 {
475 struct netpoll *np = slave->np;
476
477 if (np)
478 netpoll_send_skb(np, skb);
479 }
480 #else
bond_netpoll_send_skb(const struct slave * slave,struct sk_buff * skb)481 static inline void bond_netpoll_send_skb(const struct slave *slave,
482 struct sk_buff *skb)
483 {
484 }
485 #endif
486
bond_set_slave_inactive_flags(struct slave * slave,bool notify)487 static inline void bond_set_slave_inactive_flags(struct slave *slave,
488 bool notify)
489 {
490 if (!bond_is_lb(slave->bond))
491 bond_set_slave_state(slave, BOND_STATE_BACKUP, notify);
492 if (!slave->bond->params.all_slaves_active)
493 slave->inactive = 1;
494 }
495
bond_set_slave_active_flags(struct slave * slave,bool notify)496 static inline void bond_set_slave_active_flags(struct slave *slave,
497 bool notify)
498 {
499 bond_set_slave_state(slave, BOND_STATE_ACTIVE, notify);
500 slave->inactive = 0;
501 }
502
bond_is_slave_inactive(struct slave * slave)503 static inline bool bond_is_slave_inactive(struct slave *slave)
504 {
505 return slave->inactive;
506 }
507
bond_set_slave_link_state(struct slave * slave,int state)508 static inline void bond_set_slave_link_state(struct slave *slave, int state)
509 {
510 slave->link = state;
511 bond_queue_slave_event(slave);
512 }
513
bond_confirm_addr(struct net_device * dev,__be32 dst,__be32 local)514 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
515 {
516 struct in_device *in_dev;
517 __be32 addr = 0;
518
519 rcu_read_lock();
520 in_dev = __in_dev_get_rcu(dev);
521
522 if (in_dev)
523 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
524 RT_SCOPE_HOST);
525 rcu_read_unlock();
526 return addr;
527 }
528
529 struct bond_net {
530 struct net *net; /* Associated network namespace */
531 struct list_head dev_list;
532 #ifdef CONFIG_PROC_FS
533 struct proc_dir_entry *proc_dir;
534 #endif
535 struct class_attribute class_attr_bonding_masters;
536 };
537
538 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
539 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
540 int bond_create(struct net *net, const char *name);
541 int bond_create_sysfs(struct bond_net *net);
542 void bond_destroy_sysfs(struct bond_net *net);
543 void bond_prepare_sysfs_group(struct bonding *bond);
544 int bond_sysfs_slave_add(struct slave *slave);
545 void bond_sysfs_slave_del(struct slave *slave);
546 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
547 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
548 u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb);
549 int bond_set_carrier(struct bonding *bond);
550 void bond_select_active_slave(struct bonding *bond);
551 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
552 void bond_create_debugfs(void);
553 void bond_destroy_debugfs(void);
554 void bond_debug_register(struct bonding *bond);
555 void bond_debug_unregister(struct bonding *bond);
556 void bond_debug_reregister(struct bonding *bond);
557 const char *bond_mode_name(int mode);
558 void bond_setup(struct net_device *bond_dev);
559 unsigned int bond_get_num_tx_queues(void);
560 int bond_netlink_init(void);
561 void bond_netlink_fini(void);
562 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
563 const char *bond_slave_link_status(s8 link);
564 struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
565 struct net_device *end_dev,
566 int level);
567 int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave);
568 void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay);
569
570 #ifdef CONFIG_PROC_FS
571 void bond_create_proc_entry(struct bonding *bond);
572 void bond_remove_proc_entry(struct bonding *bond);
573 void bond_create_proc_dir(struct bond_net *bn);
574 void bond_destroy_proc_dir(struct bond_net *bn);
575 #else
bond_create_proc_entry(struct bonding * bond)576 static inline void bond_create_proc_entry(struct bonding *bond)
577 {
578 }
579
bond_remove_proc_entry(struct bonding * bond)580 static inline void bond_remove_proc_entry(struct bonding *bond)
581 {
582 }
583
bond_create_proc_dir(struct bond_net * bn)584 static inline void bond_create_proc_dir(struct bond_net *bn)
585 {
586 }
587
bond_destroy_proc_dir(struct bond_net * bn)588 static inline void bond_destroy_proc_dir(struct bond_net *bn)
589 {
590 }
591 #endif
592
bond_slave_has_mac(struct bonding * bond,const u8 * mac)593 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
594 const u8 *mac)
595 {
596 struct list_head *iter;
597 struct slave *tmp;
598
599 bond_for_each_slave(bond, tmp, iter)
600 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
601 return tmp;
602
603 return NULL;
604 }
605
606 /* Caller must hold rcu_read_lock() for read */
bond_slave_has_mac_rcu(struct bonding * bond,const u8 * mac)607 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
608 const u8 *mac)
609 {
610 struct list_head *iter;
611 struct slave *tmp;
612
613 bond_for_each_slave_rcu(bond, tmp, iter)
614 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
615 return tmp;
616
617 return NULL;
618 }
619
620 /* Caller must hold rcu_read_lock() for read */
bond_slave_has_mac_rx(struct bonding * bond,const u8 * mac)621 static inline bool bond_slave_has_mac_rx(struct bonding *bond, const u8 *mac)
622 {
623 struct list_head *iter;
624 struct slave *tmp;
625 struct netdev_hw_addr *ha;
626
627 bond_for_each_slave_rcu(bond, tmp, iter)
628 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
629 return true;
630
631 if (netdev_uc_empty(bond->dev))
632 return false;
633
634 netdev_for_each_uc_addr(ha, bond->dev)
635 if (ether_addr_equal_64bits(mac, ha->addr))
636 return true;
637
638 return false;
639 }
640
641 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
642 * Returns -1 if not found, index if found
643 */
bond_get_targets_ip(__be32 * targets,__be32 ip)644 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
645 {
646 int i;
647
648 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
649 if (targets[i] == ip)
650 return i;
651 else if (targets[i] == 0)
652 break;
653
654 return -1;
655 }
656
657 /* exported from bond_main.c */
658 extern int bond_net_id;
659 extern const struct bond_parm_tbl bond_lacp_tbl[];
660 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
661 extern const struct bond_parm_tbl arp_validate_tbl[];
662 extern const struct bond_parm_tbl arp_all_targets_tbl[];
663 extern const struct bond_parm_tbl fail_over_mac_tbl[];
664 extern const struct bond_parm_tbl pri_reselect_tbl[];
665 extern struct bond_parm_tbl ad_select_tbl[];
666
667 /* exported from bond_netlink.c */
668 extern struct rtnl_link_ops bond_link_ops;
669
bond_tx_drop(struct net_device * dev,struct sk_buff * skb)670 static inline void bond_tx_drop(struct net_device *dev, struct sk_buff *skb)
671 {
672 atomic_long_inc(&dev->tx_dropped);
673 dev_kfree_skb_any(skb);
674 }
675
676 #endif /* _NET_BONDING_H */
677