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
33 * 2005/09/27 - Mitch Williams <mitch.a.williams at intel dot com>
34 * Radheka Godse <radheka.godse at intel dot com>
35 * - Added bonding sysfs interface
38 #ifndef _LINUX_BONDING_H
39 #define _LINUX_BONDING_H
41 #include <linux/timer.h>
42 #include <linux/proc_fs.h>
43 #include <linux/if_bonding.h>
44 #include <linux/kobject.h>
48 #define DRV_VERSION "3.0.0"
49 #define DRV_RELDATE "November 8, 2005"
50 #define DRV_NAME "bonding"
51 #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
53 #define BOND_MAX_ARP_TARGETS 16
56 #define dprintk(fmt, args...) \
58 DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args )
60 #define dprintk(fmt, args...)
61 #endif /* BONDING_DEBUG */
64 ((((dev)->flags & IFF_UP) == IFF_UP) && \
65 netif_running(dev) && \
66 netif_carrier_ok(dev))
69 * Checks whether bond is ready for transmit.
71 * Caller must hold bond->lock
73 #define BOND_IS_OK(bond) \
74 (((bond)->dev->flags & IFF_UP) && \
75 netif_running((bond)->dev) && \
76 ((bond)->slave_cnt > 0))
79 * Checks whether slave is ready for transmit.
81 #define SLAVE_IS_OK(slave) \
82 (((slave)->dev->flags & IFF_UP) && \
83 netif_running((slave)->dev) && \
84 ((slave)->link == BOND_LINK_UP) && \
85 ((slave)->state == BOND_STATE_ACTIVE))
88 #define USES_PRIMARY(mode) \
89 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
90 ((mode) == BOND_MODE_TLB) || \
91 ((mode) == BOND_MODE_ALB))
94 * Less bad way to call ioctl from within the kernel; this needs to be
95 * done some other way to get the call out of interrupt context.
96 * Needs "ioctl" variable to be supplied by calling context.
98 #define IOCTL(dev, arg, cmd) ({ \
100 mm_segment_t fs = get_fs(); \
102 res = ioctl(dev, arg, cmd); \
107 * bond_for_each_slave_from - iterate the slaves list from a starting point
108 * @bond: the bond holding this list.
109 * @pos: current slave.
110 * @cnt: counter for max number of moves
111 * @start: starting point.
113 * Caller must hold bond->lock
115 #define bond_for_each_slave_from(bond, pos, cnt, start) \
116 for (cnt = 0, pos = start; \
117 cnt < (bond)->slave_cnt; \
118 cnt++, pos = (pos)->next)
121 * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
122 * @bond: the bond holding this list.
123 * @pos: current slave.
124 * @cnt: counter for number max of moves
125 * @start: start point.
128 * Caller must hold bond->lock
130 #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
131 for (cnt = 0, pos = start; \
132 ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
133 cnt++, pos = (pos)->next)
136 * bond_for_each_slave - iterate the slaves list from head
137 * @bond: the bond holding this list.
138 * @pos: current slave.
139 * @cnt: counter for max number of moves
141 * Caller must hold bond->lock
143 #define bond_for_each_slave(bond, pos, cnt) \
144 bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
156 char primary[IFNAMSIZ];
157 u32 arp_targets[BOND_MAX_ARP_TARGETS];
160 struct bond_parm_tbl {
166 struct list_head vlan_list;
168 unsigned short vlan_id;
172 struct net_device *dev; /* first - useful for panic debug */
177 s8 link; /* one of BOND_LINK_XXXX */
178 s8 state; /* one of BOND_STATE_XXXX */
180 u32 link_failure_count;
183 u8 perm_hwaddr[ETH_ALEN];
184 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
185 struct tlb_slave_info tlb_info;
189 * Here are the locking policies for the two bonding locks:
191 * 1) Get bond->lock when reading/writing slave list.
192 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
193 * (It is unnecessary when the write-lock is put with bond->lock.)
194 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
198 struct net_device *dev; /* first - useful for panic debug */
199 struct slave *first_slave;
200 struct slave *curr_active_slave;
201 struct slave *current_arp_slave;
202 struct slave *primary_slave;
203 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
205 rwlock_t curr_slave_lock;
206 struct timer_list mii_timer;
207 struct timer_list arp_timer;
209 struct net_device_stats stats;
210 #ifdef CONFIG_PROC_FS
211 struct proc_dir_entry *proc_entry;
212 char proc_file_name[IFNAMSIZ];
213 #endif /* CONFIG_PROC_FS */
214 struct list_head bond_list;
215 struct dev_mc_list *mc_list;
216 int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int);
219 struct ad_bond_info ad_info;
220 struct alb_bond_info alb_info;
221 struct bond_params params;
222 struct list_head vlan_list;
223 struct vlan_group *vlgrp;
227 * Returns NULL if the net_device does not belong to any of the bond's slaves
229 * Caller must hold bond lock for read
231 extern inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)
233 struct slave *slave = NULL;
236 bond_for_each_slave(bond, slave, i) {
237 if (slave->dev == slave_dev) {
245 extern inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
247 if (!slave || !slave->dev->master) {
251 return (struct bonding *)slave->dev->master->priv;
254 extern inline void bond_set_slave_inactive_flags(struct slave *slave)
256 slave->state = BOND_STATE_BACKUP;
257 slave->dev->flags |= IFF_NOARP;
260 extern inline void bond_set_slave_active_flags(struct slave *slave)
262 slave->state = BOND_STATE_ACTIVE;
263 slave->dev->flags &= ~IFF_NOARP;
266 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
267 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
268 int bond_create(char *name, struct bond_params *params, struct bonding **newbond);
269 void bond_deinit(struct net_device *bond_dev);
270 int bond_create_sysfs(void);
271 void bond_destroy_sysfs(void);
272 void bond_destroy_sysfs_entry(struct bonding *bond);
273 int bond_create_sysfs_entry(struct bonding *bond);
274 int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
275 void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
276 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
277 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
278 int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev);
279 void bond_mii_monitor(struct net_device *bond_dev);
280 void bond_loadbalance_arp_mon(struct net_device *bond_dev);
281 void bond_activebackup_arp_mon(struct net_device *bond_dev);
282 void bond_set_mode_ops(struct bonding *bond, int mode);
283 int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl);
284 const char *bond_mode_name(int mode);
285 void bond_select_active_slave(struct bonding *bond);
286 void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
288 #endif /* _LINUX_BONDING_H */