tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
3 *
4 * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
5 * NCM: Network and Communications Management, Inc.
6 *
7 * BUT, I'm the one who modified it for ethernet, so:
8 * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
9 *
10 * This software may be used and distributed according to the terms
11 * of the GNU Public License, incorporated herein by reference.
12 *
13 */
14
15#ifndef _LINUX_BONDING_H
16#define _LINUX_BONDING_H
17
18#include <linux/timer.h>
19#include <linux/proc_fs.h>
20#include <linux/if_bonding.h>
21#include <linux/kobject.h>
22#include "bond_3ad.h"
23#include "bond_alb.h"
24
25#define DRV_VERSION "3.0.3"
26#define DRV_RELDATE "March 23, 2006"
27#define DRV_NAME "bonding"
28#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
29
30#define BOND_MAX_ARP_TARGETS 16
31
32#ifdef BONDING_DEBUG
33#define dprintk(fmt, args...) \
34 printk(KERN_DEBUG \
35 DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args )
36#else
37#define dprintk(fmt, args...)
38#endif /* BONDING_DEBUG */
39
40#define IS_UP(dev) \
41 ((((dev)->flags & IFF_UP) == IFF_UP) && \
42 netif_running(dev) && \
43 netif_carrier_ok(dev))
44
45/*
46 * Checks whether bond is ready for transmit.
47 *
48 * Caller must hold bond->lock
49 */
50#define BOND_IS_OK(bond) \
51 (((bond)->dev->flags & IFF_UP) && \
52 netif_running((bond)->dev) && \
53 ((bond)->slave_cnt > 0))
54
55/*
56 * Checks whether slave is ready for transmit.
57 */
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))
63
64
65#define USES_PRIMARY(mode) \
66 (((mode) == BOND_MODE_ACTIVEBACKUP) || \
67 ((mode) == BOND_MODE_TLB) || \
68 ((mode) == BOND_MODE_ALB))
69
70/*
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.
74 */
75#define IOCTL(dev, arg, cmd) ({ \
76 int res = 0; \
77 mm_segment_t fs = get_fs(); \
78 set_fs(get_ds()); \
79 res = ioctl(dev, arg, cmd); \
80 set_fs(fs); \
81 res; })
82
83/**
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.
89 *
90 * Caller must hold bond->lock
91 */
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)
96
97/**
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.
103 * @stop: stop point.
104 *
105 * Caller must hold bond->lock
106 */
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)
111
112/**
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
117 *
118 * Caller must hold bond->lock
119 */
120#define bond_for_each_slave(bond, pos, cnt) \
121 bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
122
123
124struct bond_params {
125 int mode;
126 int xmit_policy;
127 int miimon;
128 int arp_interval;
129 int use_carrier;
130 int updelay;
131 int downdelay;
132 int lacp_fast;
133 char primary[IFNAMSIZ];
134 u32 arp_targets[BOND_MAX_ARP_TARGETS];
135};
136
137struct bond_parm_tbl {
138 char *modename;
139 int mode;
140};
141
142struct vlan_entry {
143 struct list_head vlan_list;
144 u32 vlan_ip;
145 unsigned short vlan_id;
146};
147
148struct slave {
149 struct net_device *dev; /* first - useful for panic debug */
150 struct slave *next;
151 struct slave *prev;
152 s16 delay;
153 u32 jiffies;
154 s8 link; /* one of BOND_LINK_XXXX */
155 s8 state; /* one of BOND_STATE_XXXX */
156 u32 original_flags;
157 u32 link_failure_count;
158 u16 speed;
159 u8 duplex;
160 u8 perm_hwaddr[ETH_ALEN];
161 struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
162 struct tlb_slave_info tlb_info;
163};
164
165/*
166 * Here are the locking policies for the two bonding locks:
167 *
168 * 1) Get bond->lock when reading/writing slave list.
169 * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
170 * (It is unnecessary when the write-lock is put with bond->lock.)
171 * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
172 * beforehand.
173 */
174struct bonding {
175 struct net_device *dev; /* first - useful for panic debug */
176 struct slave *first_slave;
177 struct slave *curr_active_slave;
178 struct slave *current_arp_slave;
179 struct slave *primary_slave;
180 s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
181 rwlock_t lock;
182 rwlock_t curr_slave_lock;
183 struct timer_list mii_timer;
184 struct timer_list arp_timer;
185 s8 kill_timers;
186 struct net_device_stats stats;
187#ifdef CONFIG_PROC_FS
188 struct proc_dir_entry *proc_entry;
189 char proc_file_name[IFNAMSIZ];
190#endif /* CONFIG_PROC_FS */
191 struct list_head bond_list;
192 struct dev_mc_list *mc_list;
193 int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int);
194 u32 master_ip;
195 u16 flags;
196 struct ad_bond_info ad_info;
197 struct alb_bond_info alb_info;
198 struct bond_params params;
199 struct list_head vlan_list;
200 struct vlan_group *vlgrp;
201};
202
203/**
204 * Returns NULL if the net_device does not belong to any of the bond's slaves
205 *
206 * Caller must hold bond lock for read
207 */
208static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)
209{
210 struct slave *slave = NULL;
211 int i;
212
213 bond_for_each_slave(bond, slave, i) {
214 if (slave->dev == slave_dev) {
215 break;
216 }
217 }
218
219 return slave;
220}
221
222static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
223{
224 if (!slave || !slave->dev->master) {
225 return NULL;
226 }
227
228 return (struct bonding *)slave->dev->master->priv;
229}
230
231static inline void bond_set_slave_inactive_flags(struct slave *slave)
232{
233 struct bonding *bond = slave->dev->master->priv;
234 if (bond->params.mode != BOND_MODE_TLB &&
235 bond->params.mode != BOND_MODE_ALB)
236 slave->state = BOND_STATE_BACKUP;
237 slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
238}
239
240static inline void bond_set_slave_active_flags(struct slave *slave)
241{
242 slave->state = BOND_STATE_ACTIVE;
243 slave->dev->priv_flags &= ~IFF_SLAVE_INACTIVE;
244}
245
246static inline void bond_set_master_3ad_flags(struct bonding *bond)
247{
248 bond->dev->priv_flags |= IFF_MASTER_8023AD;
249}
250
251static inline void bond_unset_master_3ad_flags(struct bonding *bond)
252{
253 bond->dev->priv_flags &= ~IFF_MASTER_8023AD;
254}
255
256static inline void bond_set_master_alb_flags(struct bonding *bond)
257{
258 bond->dev->priv_flags |= IFF_MASTER_ALB;
259}
260
261static inline void bond_unset_master_alb_flags(struct bonding *bond)
262{
263 bond->dev->priv_flags &= ~IFF_MASTER_ALB;
264}
265
266struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
267int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
268int bond_create(char *name, struct bond_params *params, struct bonding **newbond);
269void bond_deinit(struct net_device *bond_dev);
270int bond_create_sysfs(void);
271void bond_destroy_sysfs(void);
272void bond_destroy_sysfs_entry(struct bonding *bond);
273int bond_create_sysfs_entry(struct bonding *bond);
274int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
275void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
276int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
277int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
278int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev);
279void bond_mii_monitor(struct net_device *bond_dev);
280void bond_loadbalance_arp_mon(struct net_device *bond_dev);
281void bond_activebackup_arp_mon(struct net_device *bond_dev);
282void bond_set_mode_ops(struct bonding *bond, int mode);
283int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl);
284const char *bond_mode_name(int mode);
285void bond_select_active_slave(struct bonding *bond);
286void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
287
288#endif /* _LINUX_BONDING_H */
289