2 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
4 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
5 * NCM: Network and Communications Management, Inc.
7 * BUT, I'm the one who modified it for ethernet, so:
8 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
10 * This software may be used and distributed according to the terms
11 * of the GNU Public License, incorporated herein by reference.
15 #ifndef _LINUX_BONDING_H
16 #define _LINUX_BONDING_H
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>
31 #define DRV_VERSION "3.7.1"
32 #define DRV_RELDATE "April 27, 2011"
33 #define DRV_NAME "bonding"
34 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
36 #define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
38 #define BOND_MAX_ARP_TARGETS 16
40 #define BOND_DEFAULT_MIIMON 100
43 ((((dev)->flags & IFF_UP) == IFF_UP) && \
44 netif_running(dev) && \
45 netif_carrier_ok(dev))
48 * Checks whether slave is ready for transmit.
50 #define SLAVE_IS_OK(slave) \
51 (((slave)->dev->flags & IFF_UP) && \
52 netif_running((slave)->dev) && \
53 ((slave)->link == BOND_LINK_UP) && \
54 bond_is_active_slave(slave))
57 #define USES_PRIMARY(mode) \
58 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
59 ((mode) == BOND_MODE_TLB) || \
60 ((mode) == BOND_MODE_ALB))
62 #define BOND_NO_USES_ARP(mode) \
63 (((mode) == BOND_MODE_8023AD) || \
64 ((mode) == BOND_MODE_TLB) || \
65 ((mode) == BOND_MODE_ALB))
67 #define TX_QUEUE_OVERRIDE(mode) \
68 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
69 ((mode) == BOND_MODE_ROUNDROBIN))
71 #define BOND_MODE_IS_LB(mode) \
72 (((mode) == BOND_MODE_TLB) || \
73 ((mode) == BOND_MODE_ALB))
75 #define IS_IP_TARGET_UNUSABLE_ADDRESS(a) \
76 ((htonl(INADDR_BROADCAST) == a) || \
79 * Less bad way to call ioctl from within the kernel; this needs to be
80 * done some other way to get the call out of interrupt context.
81 * Needs "ioctl" variable to be supplied by calling context.
83 #define IOCTL(dev, arg, cmd) ({ \
85 mm_segment_t fs = get_fs(); \
87 res = ioctl(dev, arg, cmd); \
91 /* slave list primitives */
92 #define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
94 #define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
96 /* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
97 #define bond_first_slave(bond) \
98 (bond_has_slaves(bond) ? \
99 netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
101 #define bond_last_slave(bond) \
102 (bond_has_slaves(bond) ? \
103 netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
106 /* Caller must have rcu_read_lock */
107 #define bond_first_slave_rcu(bond) \
108 netdev_lower_get_first_private_rcu(bond->dev)
110 #define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
111 #define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
114 * bond_for_each_slave - iterate over all slaves
115 * @bond: the bond holding this list
116 * @pos: current slave
117 * @iter: list_head * iterator
119 * Caller must hold bond->lock
121 #define bond_for_each_slave(bond, pos, iter) \
122 netdev_for_each_lower_private((bond)->dev, pos, iter)
124 /* Caller must have rcu_read_lock */
125 #define bond_for_each_slave_rcu(bond, pos, iter) \
126 netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
128 #ifdef CONFIG_NET_POLL_CONTROLLER
129 extern atomic_t netpoll_block_tx;
131 static inline void block_netpoll_tx(void)
133 atomic_inc(&netpoll_block_tx);
136 static inline void unblock_netpoll_tx(void)
138 atomic_dec(&netpoll_block_tx);
141 static inline int is_netpoll_tx_blocked(struct net_device *dev)
143 if (unlikely(netpoll_tx_running(dev)))
144 return atomic_read(&netpoll_block_tx);
148 #define block_netpoll_tx()
149 #define unblock_netpoll_tx()
150 #define is_netpoll_tx_blocked(dev) (0)
166 unsigned int min_links;
168 char primary[IFNAMSIZ];
169 int primary_reselect;
170 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
172 int all_slaves_active;
175 int packets_per_slave;
176 struct reciprocal_value reciprocal_packets_per_slave;
179 struct bond_parm_tbl {
184 #define BOND_MAX_MODENAME_LEN 20
187 struct net_device *dev; /* first - useful for panic debug */
188 struct bonding *bond; /* our master */
190 unsigned long jiffies;
191 unsigned long last_arp_rx;
192 unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
193 s8 link; /* one of BOND_LINK_XXXX */
195 u8 backup:1, /* indicates backup slave. Value corresponds with
196 BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
197 inactive:1; /* indicates inactive slave */
200 u32 link_failure_count;
203 u8 perm_hwaddr[ETH_ALEN];
204 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
205 struct tlb_slave_info tlb_info;
206 #ifdef CONFIG_NET_POLL_CONTROLLER
213 * Link pseudo-state only used internally by monitors
215 #define BOND_LINK_NOCHANGE -1
218 * Here are the locking policies for the two bonding locks:
220 * 1) Get bond->lock when reading/writing slave list.
221 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
222 * (It is unnecessary when the write-lock is put with bond->lock.)
223 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
227 struct net_device *dev; /* first - useful for panic debug */
228 struct slave *curr_active_slave;
229 struct slave *current_arp_slave;
230 struct slave *primary_slave;
232 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
233 int (*recv_probe)(const struct sk_buff *, struct bonding *,
236 rwlock_t curr_slave_lock;
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;
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 #ifdef CONFIG_DEBUG_FS
255 /* debugging support via debugfs */
256 struct dentry *debug_dir;
257 #endif /* CONFIG_DEBUG_FS */
260 #define bond_slave_get_rcu(dev) \
261 ((struct slave *) rcu_dereference(dev->rx_handler_data))
263 #define bond_slave_get_rtnl(dev) \
264 ((struct slave *) rtnl_dereference(dev->rx_handler_data))
267 * Returns NULL if the net_device does not belong to any of the bond's slaves
269 * Caller must hold bond lock for read
271 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond,
272 struct net_device *slave_dev)
274 return netdev_lower_dev_get_private(bond->dev, slave_dev);
277 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
279 if (!slave || !slave->bond)
284 static inline bool bond_is_lb(const struct bonding *bond)
286 return BOND_MODE_IS_LB(bond->params.mode);
289 static inline void bond_set_active_slave(struct slave *slave)
293 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_KERNEL);
297 static inline void bond_set_backup_slave(struct slave *slave)
299 if (!slave->backup) {
301 rtmsg_ifinfo(RTM_NEWLINK, slave->dev, 0, GFP_KERNEL);
305 static inline int bond_slave_state(struct slave *slave)
307 return slave->backup;
310 static inline bool bond_is_active_slave(struct slave *slave)
312 return !bond_slave_state(slave);
315 #define BOND_PRI_RESELECT_ALWAYS 0
316 #define BOND_PRI_RESELECT_BETTER 1
317 #define BOND_PRI_RESELECT_FAILURE 2
319 #define BOND_FOM_NONE 0
320 #define BOND_FOM_ACTIVE 1
321 #define BOND_FOM_FOLLOW 2
323 #define BOND_ARP_TARGETS_ANY 0
324 #define BOND_ARP_TARGETS_ALL 1
326 #define BOND_ARP_VALIDATE_NONE 0
327 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
328 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
329 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
330 BOND_ARP_VALIDATE_BACKUP)
332 static inline int slave_do_arp_validate(struct bonding *bond,
335 return bond->params.arp_validate & (1 << bond_slave_state(slave));
338 /* Get the oldest arp which we've received on this slave for bond's
341 static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
345 unsigned long ret = slave->target_last_arp_rx[0];
347 for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
348 if (time_before(slave->target_last_arp_rx[i], ret))
349 ret = slave->target_last_arp_rx[i];
354 static inline unsigned long slave_last_rx(struct bonding *bond,
357 if (slave_do_arp_validate(bond, slave)) {
358 if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
359 return slave_oldest_target_arp_rx(bond, slave);
361 return slave->last_arp_rx;
364 return slave->dev->last_rx;
367 #ifdef CONFIG_NET_POLL_CONTROLLER
368 static inline void bond_netpoll_send_skb(const struct slave *slave,
371 struct netpoll *np = slave->np;
374 netpoll_send_skb(np, skb);
377 static inline void bond_netpoll_send_skb(const struct slave *slave,
383 static inline void bond_set_slave_inactive_flags(struct slave *slave)
385 if (!bond_is_lb(slave->bond))
386 bond_set_backup_slave(slave);
387 if (!slave->bond->params.all_slaves_active)
391 static inline void bond_set_slave_active_flags(struct slave *slave)
393 bond_set_active_slave(slave);
397 static inline bool bond_is_slave_inactive(struct slave *slave)
399 return slave->inactive;
402 static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
404 struct in_device *in_dev;
408 in_dev = __in_dev_get_rcu(dev);
411 addr = inet_confirm_addr(dev_net(dev), in_dev, dst, local,
417 static inline bool slave_can_tx(struct slave *slave)
419 if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
420 bond_is_active_slave(slave))
428 int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
429 void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
430 int bond_create(struct net *net, const char *name);
431 int bond_create_sysfs(struct bond_net *net);
432 void bond_destroy_sysfs(struct bond_net *net);
433 void bond_prepare_sysfs_group(struct bonding *bond);
434 int bond_sysfs_slave_add(struct slave *slave);
435 void bond_sysfs_slave_del(struct slave *slave);
436 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
437 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
438 int bond_get_slave(struct net_device *slave_dev, struct sk_buff *skb);
439 int bond_xmit_hash(struct bonding *bond, struct sk_buff *skb, int count);
440 int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
441 int bond_parm_tbl_lookup(int mode, const struct bond_parm_tbl *tbl);
442 void bond_select_active_slave(struct bonding *bond);
443 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
444 void bond_create_debugfs(void);
445 void bond_destroy_debugfs(void);
446 void bond_debug_register(struct bonding *bond);
447 void bond_debug_unregister(struct bonding *bond);
448 void bond_debug_reregister(struct bonding *bond);
449 const char *bond_mode_name(int mode);
450 void bond_setup(struct net_device *bond_dev);
451 unsigned int bond_get_num_tx_queues(void);
452 int bond_netlink_init(void);
453 void bond_netlink_fini(void);
454 int bond_option_mode_set(struct bonding *bond, int mode);
455 int bond_option_active_slave_set(struct bonding *bond, struct net_device *slave_dev);
456 int bond_option_miimon_set(struct bonding *bond, int miimon);
457 int bond_option_updelay_set(struct bonding *bond, int updelay);
458 int bond_option_downdelay_set(struct bonding *bond, int downdelay);
459 int bond_option_use_carrier_set(struct bonding *bond, int use_carrier);
460 int bond_option_arp_interval_set(struct bonding *bond, int arp_interval);
461 int bond_option_arp_ip_targets_set(struct bonding *bond, __be32 *targets,
463 int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
464 int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
465 int bond_option_arp_validate_set(struct bonding *bond, int arp_validate);
466 int bond_option_arp_all_targets_set(struct bonding *bond, int arp_all_targets);
467 int bond_option_primary_set(struct bonding *bond, const char *primary);
468 int bond_option_primary_reselect_set(struct bonding *bond,
469 int primary_reselect);
470 int bond_option_fail_over_mac_set(struct bonding *bond, int fail_over_mac);
471 int bond_option_xmit_hash_policy_set(struct bonding *bond,
472 int xmit_hash_policy);
473 int bond_option_resend_igmp_set(struct bonding *bond, int resend_igmp);
474 int bond_option_num_peer_notif_set(struct bonding *bond, int num_peer_notif);
475 int bond_option_all_slaves_active_set(struct bonding *bond,
476 int all_slaves_active);
477 int bond_option_min_links_set(struct bonding *bond, int min_links);
478 int bond_option_lp_interval_set(struct bonding *bond, int min_links);
479 int bond_option_packets_per_slave_set(struct bonding *bond,
480 int packets_per_slave);
481 int bond_option_lacp_rate_set(struct bonding *bond, int lacp_rate);
482 int bond_option_ad_select_set(struct bonding *bond, int ad_select);
483 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond);
484 struct net_device *bond_option_active_slave_get(struct bonding *bond);
485 const char *bond_slave_link_status(s8 link);
488 struct net * net; /* Associated network namespace */
489 struct list_head dev_list;
490 #ifdef CONFIG_PROC_FS
491 struct proc_dir_entry * proc_dir;
493 struct class_attribute class_attr_bonding_masters;
496 #ifdef CONFIG_PROC_FS
497 void bond_create_proc_entry(struct bonding *bond);
498 void bond_remove_proc_entry(struct bonding *bond);
499 void bond_create_proc_dir(struct bond_net *bn);
500 void bond_destroy_proc_dir(struct bond_net *bn);
502 static inline void bond_create_proc_entry(struct bonding *bond)
506 static inline void bond_remove_proc_entry(struct bonding *bond)
510 static inline void bond_create_proc_dir(struct bond_net *bn)
514 static inline void bond_destroy_proc_dir(struct bond_net *bn)
519 static inline struct slave *bond_slave_has_mac(struct bonding *bond,
522 struct list_head *iter;
525 bond_for_each_slave(bond, tmp, iter)
526 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
532 /* Caller must hold rcu_read_lock() for read */
533 static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
536 struct list_head *iter;
539 bond_for_each_slave_rcu(bond, tmp, iter)
540 if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
546 /* Check if the ip is present in arp ip list, or first free slot if ip == 0
547 * Returns -1 if not found, index if found
549 static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
553 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
554 if (targets[i] == ip)
556 else if (targets[i] == 0)
562 /* exported from bond_main.c */
563 extern int bond_net_id;
564 extern const struct bond_parm_tbl bond_lacp_tbl[];
565 extern const struct bond_parm_tbl bond_mode_tbl[];
566 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
567 extern const struct bond_parm_tbl arp_validate_tbl[];
568 extern const struct bond_parm_tbl arp_all_targets_tbl[];
569 extern const struct bond_parm_tbl fail_over_mac_tbl[];
570 extern const struct bond_parm_tbl pri_reselect_tbl[];
571 extern struct bond_parm_tbl ad_select_tbl[];
573 /* exported from bond_netlink.c */
574 extern struct rtnl_link_ops bond_link_ops;
576 #endif /* _LINUX_BONDING_H */