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:
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>
26 #define DRV_VERSION "3.7.0"
27 #define DRV_RELDATE "June 2, 2010"
28 #define DRV_NAME "bonding"
29 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
31 #define BOND_MAX_ARP_TARGETS 16
34 ((((dev)->flags & IFF_UP) == IFF_UP) && \
35 netif_running(dev) && \
36 netif_carrier_ok(dev))
39 * Checks whether bond is ready for transmit.
41 * Caller must hold bond->lock
43 #define BOND_IS_OK(bond) \
44 (((bond)->dev->flags & IFF_UP) && \
45 netif_running((bond)->dev) && \
46 ((bond)->slave_cnt > 0))
49 * Checks whether slave is ready for transmit.
51 #define SLAVE_IS_OK(slave) \
52 (((slave)->dev->flags & IFF_UP) && \
53 netif_running((slave)->dev) && \
54 ((slave)->link == BOND_LINK_UP) && \
55 ((slave)->state == BOND_STATE_ACTIVE))
58 #define USES_PRIMARY(mode) \
59 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
60 ((mode) == BOND_MODE_TLB) || \
61 ((mode) == BOND_MODE_ALB))
63 #define TX_QUEUE_OVERRIDE(mode) \
64 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
65 ((mode) == BOND_MODE_ROUNDROBIN))
67 * Less bad way to call ioctl from within the kernel; this needs to be
68 * done some other way to get the call out of interrupt context.
69 * Needs "ioctl" variable to be supplied by calling context.
71 #define IOCTL(dev, arg, cmd) ({ \
73 mm_segment_t fs = get_fs(); \
75 res = ioctl(dev, arg, cmd); \
80 * bond_for_each_slave_from - iterate the slaves list from a starting point
81 * @bond: the bond holding this list.
82 * @pos: current slave.
83 * @cnt: counter for max number of moves
84 * @start: starting point.
86 * Caller must hold bond->lock
88 #define bond_for_each_slave_from(bond, pos, cnt, start) \
89 for (cnt = 0, pos = start; \
90 cnt < (bond)->slave_cnt; \
91 cnt++, pos = (pos)->next)
94 * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
95 * @bond: the bond holding this list.
96 * @pos: current slave.
97 * @cnt: counter for number max of moves
98 * @start: start point.
101 * Caller must hold bond->lock
103 #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
104 for (cnt = 0, pos = start; \
105 ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
106 cnt++, pos = (pos)->next)
109 * bond_for_each_slave - iterate the slaves list from head
110 * @bond: the bond holding this list.
111 * @pos: current slave.
112 * @cnt: counter for max number of moves
114 * Caller must hold bond->lock
116 #define bond_for_each_slave(bond, pos, cnt) \
117 bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
120 #ifdef CONFIG_NET_POLL_CONTROLLER
121 extern atomic_t netpoll_block_tx;
123 static inline void block_netpoll_tx(void)
125 atomic_inc(&netpoll_block_tx);
128 static inline void unblock_netpoll_tx(void)
130 atomic_dec(&netpoll_block_tx);
133 static inline int is_netpoll_tx_blocked(struct net_device *dev)
135 if (unlikely(dev->priv_flags & IFF_IN_NETPOLL))
136 return atomic_read(&netpoll_block_tx);
140 #define block_netpoll_tx()
141 #define unblock_netpoll_tx()
142 #define is_netpoll_tx_blocked(dev) (0)
159 char primary[IFNAMSIZ];
160 int primary_reselect;
161 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
163 int all_slaves_active;
167 struct bond_parm_tbl {
172 #define BOND_MAX_MODENAME_LEN 20
175 struct list_head vlan_list;
177 unsigned short vlan_id;
178 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
179 struct in6_addr vlan_ipv6;
184 struct net_device *dev; /* first - useful for panic debug */
188 unsigned long jiffies;
189 unsigned long last_arp_rx;
190 s8 link; /* one of BOND_LINK_XXXX */
192 s8 state; /* one of BOND_STATE_XXXX */
194 u32 link_failure_count;
195 u8 perm_hwaddr[ETH_ALEN];
199 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
200 struct tlb_slave_info tlb_info;
204 * Link pseudo-state only used internally by monitors
206 #define BOND_LINK_NOCHANGE -1
209 * Here are the locking policies for the two bonding locks:
211 * 1) Get bond->lock when reading/writing slave list.
212 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
213 * (It is unnecessary when the write-lock is put with bond->lock.)
214 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
218 struct net_device *dev; /* first - useful for panic debug */
219 struct slave *first_slave;
220 struct slave *curr_active_slave;
221 struct slave *current_arp_slave;
222 struct slave *primary_slave;
224 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
226 rwlock_t curr_slave_lock;
232 #ifdef CONFIG_PROC_FS
233 struct proc_dir_entry *proc_entry;
234 char proc_file_name[IFNAMSIZ];
235 #endif /* CONFIG_PROC_FS */
236 struct list_head bond_list;
237 struct netdev_hw_addr_list mc_list;
238 int (*xmit_hash_policy)(struct sk_buff *, int);
242 struct ad_bond_info ad_info;
243 struct alb_bond_info alb_info;
244 struct bond_params params;
245 struct list_head vlan_list;
246 struct vlan_group *vlgrp;
247 struct packet_type arp_mon_pt;
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 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
255 struct in6_addr master_ipv6;
257 #ifdef CONFIG_DEBUG_FS
258 /* debugging suport via debugfs */
259 struct dentry *debug_dir;
260 #endif /* CONFIG_DEBUG_FS */
264 * Returns NULL if the net_device does not belong to any of the bond's slaves
266 * Caller must hold bond lock for read
268 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)
270 struct slave *slave = NULL;
273 bond_for_each_slave(bond, slave, i) {
274 if (slave->dev == slave_dev) {
282 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
284 if (!slave || !slave->dev->master) {
288 return netdev_priv(slave->dev->master);
291 static inline bool bond_is_lb(const struct bonding *bond)
293 return (bond->params.mode == BOND_MODE_TLB ||
294 bond->params.mode == BOND_MODE_ALB);
297 #define BOND_PRI_RESELECT_ALWAYS 0
298 #define BOND_PRI_RESELECT_BETTER 1
299 #define BOND_PRI_RESELECT_FAILURE 2
301 #define BOND_FOM_NONE 0
302 #define BOND_FOM_ACTIVE 1
303 #define BOND_FOM_FOLLOW 2
305 #define BOND_ARP_VALIDATE_NONE 0
306 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
307 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
308 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
309 BOND_ARP_VALIDATE_BACKUP)
311 static inline int slave_do_arp_validate(struct bonding *bond,
314 return bond->params.arp_validate & (1 << slave->state);
317 static inline unsigned long slave_last_rx(struct bonding *bond,
320 if (slave_do_arp_validate(bond, slave))
321 return slave->last_arp_rx;
323 return slave->dev->last_rx;
326 static inline void bond_set_slave_inactive_flags(struct slave *slave)
328 struct bonding *bond = netdev_priv(slave->dev->master);
329 if (!bond_is_lb(bond))
330 slave->state = BOND_STATE_BACKUP;
331 if (!bond->params.all_slaves_active)
332 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
333 if (slave_do_arp_validate(bond, slave))
334 slave->dev->priv_flags |= IFF_SLAVE_NEEDARP;
337 static inline void bond_set_slave_active_flags(struct slave *slave)
339 slave->state = BOND_STATE_ACTIVE;
340 slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP);
343 static inline void bond_set_master_3ad_flags(struct bonding *bond)
345 bond->dev->priv_flags |= IFF_MASTER_8023AD;
348 static inline void bond_unset_master_3ad_flags(struct bonding *bond)
350 bond->dev->priv_flags &= ~IFF_MASTER_8023AD;
353 static inline void bond_set_master_alb_flags(struct bonding *bond)
355 bond->dev->priv_flags |= IFF_MASTER_ALB;
358 static inline void bond_unset_master_alb_flags(struct bonding *bond)
360 bond->dev->priv_flags &= ~IFF_MASTER_ALB;
363 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
364 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
365 int bond_create(struct net *net, const char *name);
366 int bond_create_sysfs(void);
367 void bond_destroy_sysfs(void);
368 void bond_prepare_sysfs_group(struct bonding *bond);
369 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
370 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
371 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
372 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
373 void bond_mii_monitor(struct work_struct *);
374 void bond_loadbalance_arp_mon(struct work_struct *);
375 void bond_activebackup_arp_mon(struct work_struct *);
376 void bond_set_mode_ops(struct bonding *bond, int mode);
377 int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
378 void bond_select_active_slave(struct bonding *bond);
379 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
380 void bond_register_arp(struct bonding *);
381 void bond_unregister_arp(struct bonding *);
382 void bond_create_debugfs(void);
383 void bond_destroy_debugfs(void);
384 void bond_debug_register(struct bonding *bond);
385 void bond_debug_unregister(struct bonding *bond);
386 void bond_debug_reregister(struct bonding *bond);
389 struct net * net; /* Associated network namespace */
390 struct list_head dev_list;
391 #ifdef CONFIG_PROC_FS
392 struct proc_dir_entry * proc_dir;
396 /* exported from bond_main.c */
397 extern int bond_net_id;
398 extern const struct bond_parm_tbl bond_lacp_tbl[];
399 extern const struct bond_parm_tbl bond_mode_tbl[];
400 extern const struct bond_parm_tbl xmit_hashtype_tbl[];
401 extern const struct bond_parm_tbl arp_validate_tbl[];
402 extern const struct bond_parm_tbl fail_over_mac_tbl[];
403 extern const struct bond_parm_tbl pri_reselect_tbl[];
404 extern struct bond_parm_tbl ad_select_tbl[];
406 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
407 void bond_send_unsolicited_na(struct bonding *bond);
408 void bond_register_ipv6_notifier(void);
409 void bond_unregister_ipv6_notifier(void);
411 static inline void bond_send_unsolicited_na(struct bonding *bond)
415 static inline void bond_register_ipv6_notifier(void)
419 static inline void bond_unregister_ipv6_notifier(void)
425 #endif /* _LINUX_BONDING_H */