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/kobject.h>
25 #define DRV_VERSION "3.3.0"
26 #define DRV_RELDATE "June 10, 2008"
27 #define DRV_NAME "bonding"
28 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
30 #define BOND_MAX_ARP_TARGETS 16
33 #define dprintk(fmt, args...) \
35 DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args )
37 #define dprintk(fmt, args...)
38 #endif /* BONDING_DEBUG */
41 ((((dev)->flags & IFF_UP) == IFF_UP) && \
42 netif_running(dev) && \
43 netif_carrier_ok(dev))
46 * Checks whether bond is ready for transmit.
48 * Caller must hold bond->lock
50 #define BOND_IS_OK(bond) \
51 (((bond)->dev->flags & IFF_UP) && \
52 netif_running((bond)->dev) && \
53 ((bond)->slave_cnt > 0))
56 * Checks whether slave is ready for transmit.
58 #define SLAVE_IS_OK(slave) \
59 (((slave)->dev->flags & IFF_UP) && \
60 netif_running((slave)->dev) && \
61 ((slave)->link == BOND_LINK_UP) && \
62 ((slave)->state == BOND_STATE_ACTIVE))
65 #define USES_PRIMARY(mode) \
66 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
67 ((mode) == BOND_MODE_TLB) || \
68 ((mode) == BOND_MODE_ALB))
71 * Less bad way to call ioctl from within the kernel; this needs to be
72 * done some other way to get the call out of interrupt context.
73 * Needs "ioctl" variable to be supplied by calling context.
75 #define IOCTL(dev, arg, cmd) ({ \
77 mm_segment_t fs = get_fs(); \
79 res = ioctl(dev, arg, cmd); \
84 * bond_for_each_slave_from - iterate the slaves list from a starting point
85 * @bond: the bond holding this list.
86 * @pos: current slave.
87 * @cnt: counter for max number of moves
88 * @start: starting point.
90 * Caller must hold bond->lock
92 #define bond_for_each_slave_from(bond, pos, cnt, start) \
93 for (cnt = 0, pos = start; \
94 cnt < (bond)->slave_cnt; \
95 cnt++, pos = (pos)->next)
98 * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
99 * @bond: the bond holding this list.
100 * @pos: current slave.
101 * @cnt: counter for number max of moves
102 * @start: start point.
105 * Caller must hold bond->lock
107 #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
108 for (cnt = 0, pos = start; \
109 ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
110 cnt++, pos = (pos)->next)
113 * bond_for_each_slave - iterate the slaves list from head
114 * @bond: the bond holding this list.
115 * @pos: current slave.
116 * @cnt: counter for max number of moves
118 * Caller must hold bond->lock
120 #define bond_for_each_slave(bond, pos, cnt) \
121 bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
136 char primary[IFNAMSIZ];
137 __be32 arp_targets[BOND_MAX_ARP_TARGETS];
140 struct bond_parm_tbl {
145 #define BOND_MAX_MODENAME_LEN 20
148 struct list_head vlan_list;
150 unsigned short vlan_id;
154 struct net_device *dev; /* first - useful for panic debug */
158 unsigned long jiffies;
159 unsigned long last_arp_rx;
160 s8 link; /* one of BOND_LINK_XXXX */
162 s8 state; /* one of BOND_STATE_XXXX */
165 u32 link_failure_count;
168 u8 perm_hwaddr[ETH_ALEN];
169 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
170 struct tlb_slave_info tlb_info;
174 * Link pseudo-state only used internally by monitors
176 #define BOND_LINK_NOCHANGE -1
179 * Here are the locking policies for the two bonding locks:
181 * 1) Get bond->lock when reading/writing slave list.
182 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
183 * (It is unnecessary when the write-lock is put with bond->lock.)
184 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
188 struct net_device *dev; /* first - useful for panic debug */
189 struct slave *first_slave;
190 struct slave *curr_active_slave;
191 struct slave *current_arp_slave;
192 struct slave *primary_slave;
193 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
195 rwlock_t curr_slave_lock;
199 struct net_device_stats stats;
200 #ifdef CONFIG_PROC_FS
201 struct proc_dir_entry *proc_entry;
202 char proc_file_name[IFNAMSIZ];
203 #endif /* CONFIG_PROC_FS */
204 struct list_head bond_list;
205 struct dev_mc_list *mc_list;
206 int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int);
210 struct ad_bond_info ad_info;
211 struct alb_bond_info alb_info;
212 struct bond_params params;
213 struct list_head vlan_list;
214 struct vlan_group *vlgrp;
215 struct packet_type arp_mon_pt;
216 struct workqueue_struct *wq;
217 struct delayed_work mii_work;
218 struct delayed_work arp_work;
219 struct delayed_work alb_work;
220 struct delayed_work ad_work;
224 * Returns NULL if the net_device does not belong to any of the bond's slaves
226 * Caller must hold bond lock for read
228 static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)
230 struct slave *slave = NULL;
233 bond_for_each_slave(bond, slave, i) {
234 if (slave->dev == slave_dev) {
242 static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
244 if (!slave || !slave->dev->master) {
248 return (struct bonding *)slave->dev->master->priv;
251 #define BOND_FOM_NONE 0
252 #define BOND_FOM_ACTIVE 1
253 #define BOND_FOM_FOLLOW 2
255 #define BOND_ARP_VALIDATE_NONE 0
256 #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
257 #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
258 #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
259 BOND_ARP_VALIDATE_BACKUP)
261 static inline int slave_do_arp_validate(struct bonding *bond,
264 return bond->params.arp_validate & (1 << slave->state);
267 static inline unsigned long slave_last_rx(struct bonding *bond,
270 if (slave_do_arp_validate(bond, slave))
271 return slave->last_arp_rx;
273 return slave->dev->last_rx;
276 static inline void bond_set_slave_inactive_flags(struct slave *slave)
278 struct bonding *bond = slave->dev->master->priv;
279 if (bond->params.mode != BOND_MODE_TLB &&
280 bond->params.mode != BOND_MODE_ALB)
281 slave->state = BOND_STATE_BACKUP;
282 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
283 if (slave_do_arp_validate(bond, slave))
284 slave->dev->priv_flags |= IFF_SLAVE_NEEDARP;
287 static inline void bond_set_slave_active_flags(struct slave *slave)
289 slave->state = BOND_STATE_ACTIVE;
290 slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP);
293 static inline void bond_set_master_3ad_flags(struct bonding *bond)
295 bond->dev->priv_flags |= IFF_MASTER_8023AD;
298 static inline void bond_unset_master_3ad_flags(struct bonding *bond)
300 bond->dev->priv_flags &= ~IFF_MASTER_8023AD;
303 static inline void bond_set_master_alb_flags(struct bonding *bond)
305 bond->dev->priv_flags |= IFF_MASTER_ALB;
308 static inline void bond_unset_master_alb_flags(struct bonding *bond)
310 bond->dev->priv_flags &= ~IFF_MASTER_ALB;
313 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
314 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
315 int bond_create(char *name, struct bond_params *params);
316 void bond_destroy(struct bonding *bond);
317 int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev);
318 int bond_create_sysfs(void);
319 void bond_destroy_sysfs(void);
320 void bond_destroy_sysfs_entry(struct bonding *bond);
321 int bond_create_sysfs_entry(struct bonding *bond);
322 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
323 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
324 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
325 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
326 void bond_mii_monitor(struct work_struct *);
327 void bond_loadbalance_arp_mon(struct work_struct *);
328 void bond_activebackup_arp_mon(struct work_struct *);
329 void bond_set_mode_ops(struct bonding *bond, int mode);
330 int bond_parse_parm(const char *mode_arg, struct bond_parm_tbl *tbl);
331 void bond_select_active_slave(struct bonding *bond);
332 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
333 void bond_register_arp(struct bonding *);
334 void bond_unregister_arp(struct bonding *);
336 #endif /* _LINUX_BONDING_H */