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1da177e4 LT |
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 | * 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. | |
18 | * | |
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). | |
22 | * | |
23 | * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> | |
24 | * - Added support for Transmit load balancing mode. | |
25 | * | |
26 | * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com> | |
27 | * - Code cleanup and style changes | |
28 | */ | |
29 | ||
30 | #ifndef _LINUX_BONDING_H | |
31 | #define _LINUX_BONDING_H | |
32 | ||
33 | #include <linux/timer.h> | |
34 | #include <linux/proc_fs.h> | |
35 | #include <linux/if_bonding.h> | |
36 | #include "bond_3ad.h" | |
37 | #include "bond_alb.h" | |
38 | ||
c3ade5ca JV |
39 | #define DRV_VERSION "2.6.2" |
40 | #define DRV_RELDATE "June 5, 2005" | |
1da177e4 LT |
41 | #define DRV_NAME "bonding" |
42 | #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver" | |
43 | ||
44 | #define BOND_MAX_ARP_TARGETS 16 | |
45 | ||
46 | #ifdef BONDING_DEBUG | |
47 | #define dprintk(fmt, args...) \ | |
48 | printk(KERN_DEBUG \ | |
49 | DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args ) | |
50 | #else | |
51 | #define dprintk(fmt, args...) | |
52 | #endif /* BONDING_DEBUG */ | |
53 | ||
54 | #define IS_UP(dev) \ | |
55 | ((((dev)->flags & IFF_UP) == IFF_UP) && \ | |
56 | netif_running(dev) && \ | |
57 | netif_carrier_ok(dev)) | |
58 | ||
59 | /* | |
60 | * Checks whether bond is ready for transmit. | |
61 | * | |
62 | * Caller must hold bond->lock | |
63 | */ | |
64 | #define BOND_IS_OK(bond) \ | |
65 | (((bond)->dev->flags & IFF_UP) && \ | |
66 | netif_running((bond)->dev) && \ | |
67 | ((bond)->slave_cnt > 0)) | |
68 | ||
69 | /* | |
70 | * Checks whether slave is ready for transmit. | |
71 | */ | |
72 | #define SLAVE_IS_OK(slave) \ | |
73 | (((slave)->dev->flags & IFF_UP) && \ | |
74 | netif_running((slave)->dev) && \ | |
75 | ((slave)->link == BOND_LINK_UP) && \ | |
76 | ((slave)->state == BOND_STATE_ACTIVE)) | |
77 | ||
78 | ||
79 | #define USES_PRIMARY(mode) \ | |
80 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ | |
81 | ((mode) == BOND_MODE_TLB) || \ | |
82 | ((mode) == BOND_MODE_ALB)) | |
83 | ||
84 | /* | |
85 | * Less bad way to call ioctl from within the kernel; this needs to be | |
86 | * done some other way to get the call out of interrupt context. | |
87 | * Needs "ioctl" variable to be supplied by calling context. | |
88 | */ | |
89 | #define IOCTL(dev, arg, cmd) ({ \ | |
90 | int res = 0; \ | |
91 | mm_segment_t fs = get_fs(); \ | |
92 | set_fs(get_ds()); \ | |
93 | res = ioctl(dev, arg, cmd); \ | |
94 | set_fs(fs); \ | |
95 | res; }) | |
96 | ||
97 | /** | |
98 | * bond_for_each_slave_from - iterate the slaves list from a starting point | |
99 | * @bond: the bond holding this list. | |
100 | * @pos: current slave. | |
101 | * @cnt: counter for max number of moves | |
102 | * @start: starting point. | |
103 | * | |
104 | * Caller must hold bond->lock | |
105 | */ | |
106 | #define bond_for_each_slave_from(bond, pos, cnt, start) \ | |
107 | for (cnt = 0, pos = start; \ | |
108 | cnt < (bond)->slave_cnt; \ | |
109 | cnt++, pos = (pos)->next) | |
110 | ||
111 | /** | |
112 | * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point | |
113 | * @bond: the bond holding this list. | |
114 | * @pos: current slave. | |
115 | * @cnt: counter for number max of moves | |
116 | * @start: start point. | |
117 | * @stop: stop point. | |
118 | * | |
119 | * Caller must hold bond->lock | |
120 | */ | |
121 | #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \ | |
122 | for (cnt = 0, pos = start; \ | |
123 | ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \ | |
124 | cnt++, pos = (pos)->next) | |
125 | ||
126 | /** | |
127 | * bond_for_each_slave - iterate the slaves list from head | |
128 | * @bond: the bond holding this list. | |
129 | * @pos: current slave. | |
130 | * @cnt: counter for max number of moves | |
131 | * | |
132 | * Caller must hold bond->lock | |
133 | */ | |
134 | #define bond_for_each_slave(bond, pos, cnt) \ | |
135 | bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave) | |
136 | ||
137 | ||
138 | struct bond_params { | |
139 | int mode; | |
140 | int miimon; | |
141 | int arp_interval; | |
142 | int use_carrier; | |
143 | int updelay; | |
144 | int downdelay; | |
145 | int lacp_fast; | |
146 | char primary[IFNAMSIZ]; | |
147 | u32 arp_targets[BOND_MAX_ARP_TARGETS]; | |
148 | }; | |
149 | ||
150 | struct vlan_entry { | |
151 | struct list_head vlan_list; | |
c3ade5ca | 152 | u32 vlan_ip; |
1da177e4 LT |
153 | unsigned short vlan_id; |
154 | }; | |
155 | ||
156 | struct slave { | |
157 | struct net_device *dev; /* first - usefull for panic debug */ | |
158 | struct slave *next; | |
159 | struct slave *prev; | |
160 | s16 delay; | |
161 | u32 jiffies; | |
162 | s8 link; /* one of BOND_LINK_XXXX */ | |
163 | s8 state; /* one of BOND_STATE_XXXX */ | |
164 | u32 original_flags; | |
165 | u32 link_failure_count; | |
166 | u16 speed; | |
167 | u8 duplex; | |
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; | |
171 | }; | |
172 | ||
173 | /* | |
174 | * Here are the locking policies for the two bonding locks: | |
175 | * | |
176 | * 1) Get bond->lock when reading/writing slave list. | |
177 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. | |
178 | * (It is unnecessary when the write-lock is put with bond->lock.) | |
179 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock | |
180 | * beforehand. | |
181 | */ | |
182 | struct bonding { | |
183 | struct net_device *dev; /* first - usefull for panic debug */ | |
184 | struct slave *first_slave; | |
185 | struct slave *curr_active_slave; | |
186 | struct slave *current_arp_slave; | |
187 | struct slave *primary_slave; | |
188 | s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ | |
189 | rwlock_t lock; | |
190 | rwlock_t curr_slave_lock; | |
191 | struct timer_list mii_timer; | |
192 | struct timer_list arp_timer; | |
193 | s8 kill_timers; | |
194 | struct net_device_stats stats; | |
195 | #ifdef CONFIG_PROC_FS | |
196 | struct proc_dir_entry *proc_entry; | |
197 | char proc_file_name[IFNAMSIZ]; | |
198 | #endif /* CONFIG_PROC_FS */ | |
199 | struct list_head bond_list; | |
200 | struct dev_mc_list *mc_list; | |
c3ade5ca | 201 | u32 master_ip; |
1da177e4 LT |
202 | u16 flags; |
203 | struct ad_bond_info ad_info; | |
204 | struct alb_bond_info alb_info; | |
205 | struct bond_params params; | |
206 | struct list_head vlan_list; | |
207 | struct vlan_group *vlgrp; | |
208 | }; | |
209 | ||
210 | /** | |
211 | * Returns NULL if the net_device does not belong to any of the bond's slaves | |
212 | * | |
213 | * Caller must hold bond lock for read | |
214 | */ | |
215 | extern inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) | |
216 | { | |
217 | struct slave *slave = NULL; | |
218 | int i; | |
219 | ||
220 | bond_for_each_slave(bond, slave, i) { | |
221 | if (slave->dev == slave_dev) { | |
222 | break; | |
223 | } | |
224 | } | |
225 | ||
226 | return slave; | |
227 | } | |
228 | ||
229 | extern inline struct bonding *bond_get_bond_by_slave(struct slave *slave) | |
230 | { | |
231 | if (!slave || !slave->dev->master) { | |
232 | return NULL; | |
233 | } | |
234 | ||
235 | return (struct bonding *)slave->dev->master->priv; | |
236 | } | |
237 | ||
238 | extern inline void bond_set_slave_inactive_flags(struct slave *slave) | |
239 | { | |
240 | slave->state = BOND_STATE_BACKUP; | |
241 | slave->dev->flags |= IFF_NOARP; | |
242 | } | |
243 | ||
244 | extern inline void bond_set_slave_active_flags(struct slave *slave) | |
245 | { | |
246 | slave->state = BOND_STATE_ACTIVE; | |
247 | slave->dev->flags &= ~IFF_NOARP; | |
248 | } | |
249 | ||
250 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); | |
251 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); | |
252 | ||
253 | #endif /* _LINUX_BONDING_H */ | |
254 |