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.
14 * 2003/03/18 - Amir Noam <amir.noam at intel dot com>,
15 * Tsippy Mendelson <tsippy.mendelson at intel dot com> and
16 * Shmulik Hen <shmulik.hen at intel dot com>
17 * - Added support for IEEE 802.3ad Dynamic link aggregation mode.
19 * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and
20 * Amir Noam <amir.noam at intel dot com>
21 * - Code beautification and style changes (mainly in comments).
23 * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com>
24 * - Added support for Transmit load balancing mode.
26 * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
27 * - Code cleanup and style changes
29 * 2005/05/05 - Jason Gabler <jygabler at lbl dot gov>
30 * - added "xmit_policy" kernel parameter for alternate hashing policy
34 #ifndef _LINUX_BONDING_H
35 #define _LINUX_BONDING_H
37 #include <linux/timer.h>
38 #include <linux/proc_fs.h>
39 #include <linux/if_bonding.h>
40 #include <linux/kobject.h>
44 #define DRV_VERSION "3.0.0"
45 #define DRV_RELDATE "November 8, 2005"
46 #define DRV_NAME "bonding"
47 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
49 #define BOND_MAX_ARP_TARGETS 16
52 #define dprintk(fmt, args...) \
54 DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args )
56 #define dprintk(fmt, args...)
57 #endif /* BONDING_DEBUG */
60 ((((dev)->flags & IFF_UP) == IFF_UP) && \
61 netif_running(dev) && \
62 netif_carrier_ok(dev))
65 * Checks whether bond is ready for transmit.
67 * Caller must hold bond->lock
69 #define BOND_IS_OK(bond) \
70 (((bond)->dev->flags & IFF_UP) && \
71 netif_running((bond)->dev) && \
72 ((bond)->slave_cnt > 0))
75 * Checks whether slave is ready for transmit.
77 #define SLAVE_IS_OK(slave) \
78 (((slave)->dev->flags & IFF_UP) && \
79 netif_running((slave)->dev) && \
80 ((slave)->link == BOND_LINK_UP) && \
81 ((slave)->state == BOND_STATE_ACTIVE))
84 #define USES_PRIMARY(mode) \
85 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
86 ((mode) == BOND_MODE_TLB) || \
87 ((mode) == BOND_MODE_ALB))
90 * Less bad way to call ioctl from within the kernel; this needs to be
91 * done some other way to get the call out of interrupt context.
92 * Needs "ioctl" variable to be supplied by calling context.
94 #define IOCTL(dev, arg, cmd) ({ \
96 mm_segment_t fs = get_fs(); \
98 res = ioctl(dev, arg, cmd); \
103 * bond_for_each_slave_from - iterate the slaves list from a starting point
104 * @bond: the bond holding this list.
105 * @pos: current slave.
106 * @cnt: counter for max number of moves
107 * @start: starting point.
109 * Caller must hold bond->lock
111 #define bond_for_each_slave_from(bond, pos, cnt, start) \
112 for (cnt = 0, pos = start; \
113 cnt < (bond)->slave_cnt; \
114 cnt++, pos = (pos)->next)
117 * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
118 * @bond: the bond holding this list.
119 * @pos: current slave.
120 * @cnt: counter for number max of moves
121 * @start: start point.
124 * Caller must hold bond->lock
126 #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
127 for (cnt = 0, pos = start; \
128 ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
129 cnt++, pos = (pos)->next)
132 * bond_for_each_slave - iterate the slaves list from head
133 * @bond: the bond holding this list.
134 * @pos: current slave.
135 * @cnt: counter for max number of moves
137 * Caller must hold bond->lock
139 #define bond_for_each_slave(bond, pos, cnt) \
140 bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
152 char primary[IFNAMSIZ];
153 u32 arp_targets[BOND_MAX_ARP_TARGETS];
156 struct bond_parm_tbl {
162 struct list_head vlan_list;
164 unsigned short vlan_id;
168 struct net_device *dev; /* first - useful for panic debug */
173 s8 link; /* one of BOND_LINK_XXXX */
174 s8 state; /* one of BOND_STATE_XXXX */
176 u32 link_failure_count;
179 u8 perm_hwaddr[ETH_ALEN];
180 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
181 struct tlb_slave_info tlb_info;
185 * Here are the locking policies for the two bonding locks:
187 * 1) Get bond->lock when reading/writing slave list.
188 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
189 * (It is unnecessary when the write-lock is put with bond->lock.)
190 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
194 struct net_device *dev; /* first - useful for panic debug */
195 struct slave *first_slave;
196 struct slave *curr_active_slave;
197 struct slave *current_arp_slave;
198 struct slave *primary_slave;
199 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
201 rwlock_t curr_slave_lock;
202 struct timer_list mii_timer;
203 struct timer_list arp_timer;
205 struct net_device_stats stats;
206 #ifdef CONFIG_PROC_FS
207 struct proc_dir_entry *proc_entry;
208 char proc_file_name[IFNAMSIZ];
209 #endif /* CONFIG_PROC_FS */
210 struct list_head bond_list;
211 struct dev_mc_list *mc_list;
212 int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int);
215 struct ad_bond_info ad_info;
216 struct alb_bond_info alb_info;
217 struct bond_params params;
218 struct list_head vlan_list;
219 struct vlan_group *vlgrp;
223 * Returns NULL if the net_device does not belong to any of the bond's slaves
225 * Caller must hold bond lock for read
227 extern inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)
229 struct slave *slave = NULL;
232 bond_for_each_slave(bond, slave, i) {
233 if (slave->dev == slave_dev) {
241 extern inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
243 if (!slave || !slave->dev->master) {
247 return (struct bonding *)slave->dev->master->priv;
250 extern inline void bond_set_slave_inactive_flags(struct slave *slave)
252 slave->state = BOND_STATE_BACKUP;
253 slave->dev->flags |= IFF_NOARP;
256 extern inline void bond_set_slave_active_flags(struct slave *slave)
258 slave->state = BOND_STATE_ACTIVE;
259 slave->dev->flags &= ~IFF_NOARP;
262 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
263 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
264 int bond_create(char *name, struct bond_params *params, struct bonding **newbond);
265 void bond_deinit(struct net_device *bond_dev);
266 int bond_create_sysfs(void);
267 void bond_destroy_sysfs(void);
268 void bond_destroy_sysfs_entry(struct bonding *bond);
269 int bond_create_sysfs_entry(struct bonding *bond);
270 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
271 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
272 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
273 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
274 int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev);
275 void bond_mii_monitor(struct net_device *bond_dev);
276 void bond_loadbalance_arp_mon(struct net_device *bond_dev);
277 void bond_activebackup_arp_mon(struct net_device *bond_dev);
278 void bond_set_mode_ops(struct bonding *bond, int mode);
279 int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl);
280 const char *bond_mode_name(int mode);
281 void bond_select_active_slave(struct bonding *bond);
282 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
284 #endif /* _LINUX_BONDING_H */