Commit | Line | Data |
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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 | * | |
1da177e4 LT |
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> | |
b76cdba9 | 21 | #include <linux/kobject.h> |
1da177e4 LT |
22 | #include "bond_3ad.h" |
23 | #include "bond_alb.h" | |
24 | ||
031ae4de JV |
25 | #define DRV_VERSION "3.1.3" |
26 | #define DRV_RELDATE "June 13, 2007" | |
1da177e4 LT |
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 | ||
124 | struct bond_params { | |
125 | int mode; | |
169a3e66 | 126 | int xmit_policy; |
1da177e4 LT |
127 | int miimon; |
128 | int arp_interval; | |
f5b2b966 | 129 | int arp_validate; |
1da177e4 LT |
130 | int use_carrier; |
131 | int updelay; | |
132 | int downdelay; | |
133 | int lacp_fast; | |
134 | char primary[IFNAMSIZ]; | |
135 | u32 arp_targets[BOND_MAX_ARP_TARGETS]; | |
136 | }; | |
137 | ||
12479f9a MW |
138 | struct bond_parm_tbl { |
139 | char *modename; | |
140 | int mode; | |
141 | }; | |
142 | ||
1da177e4 LT |
143 | struct vlan_entry { |
144 | struct list_head vlan_list; | |
c3ade5ca | 145 | u32 vlan_ip; |
1da177e4 LT |
146 | unsigned short vlan_id; |
147 | }; | |
148 | ||
149 | struct slave { | |
e944ef79 | 150 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
151 | struct slave *next; |
152 | struct slave *prev; | |
8bb5f96b | 153 | int delay; |
f8a8ccd5 AG |
154 | unsigned long jiffies; |
155 | unsigned long last_arp_rx; | |
1da177e4 LT |
156 | s8 link; /* one of BOND_LINK_XXXX */ |
157 | s8 state; /* one of BOND_STATE_XXXX */ | |
158 | u32 original_flags; | |
159 | u32 link_failure_count; | |
160 | u16 speed; | |
161 | u8 duplex; | |
162 | u8 perm_hwaddr[ETH_ALEN]; | |
163 | struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */ | |
164 | struct tlb_slave_info tlb_info; | |
165 | }; | |
166 | ||
167 | /* | |
168 | * Here are the locking policies for the two bonding locks: | |
169 | * | |
170 | * 1) Get bond->lock when reading/writing slave list. | |
171 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. | |
172 | * (It is unnecessary when the write-lock is put with bond->lock.) | |
173 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock | |
174 | * beforehand. | |
175 | */ | |
176 | struct bonding { | |
e944ef79 | 177 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
178 | struct slave *first_slave; |
179 | struct slave *curr_active_slave; | |
180 | struct slave *current_arp_slave; | |
181 | struct slave *primary_slave; | |
182 | s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ | |
183 | rwlock_t lock; | |
184 | rwlock_t curr_slave_lock; | |
185 | struct timer_list mii_timer; | |
186 | struct timer_list arp_timer; | |
187 | s8 kill_timers; | |
188 | struct net_device_stats stats; | |
189 | #ifdef CONFIG_PROC_FS | |
190 | struct proc_dir_entry *proc_entry; | |
191 | char proc_file_name[IFNAMSIZ]; | |
192 | #endif /* CONFIG_PROC_FS */ | |
193 | struct list_head bond_list; | |
194 | struct dev_mc_list *mc_list; | |
169a3e66 | 195 | int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int); |
c3ade5ca | 196 | u32 master_ip; |
1da177e4 LT |
197 | u16 flags; |
198 | struct ad_bond_info ad_info; | |
199 | struct alb_bond_info alb_info; | |
200 | struct bond_params params; | |
201 | struct list_head vlan_list; | |
202 | struct vlan_group *vlgrp; | |
f5b2b966 | 203 | struct packet_type arp_mon_pt; |
1da177e4 LT |
204 | }; |
205 | ||
206 | /** | |
207 | * Returns NULL if the net_device does not belong to any of the bond's slaves | |
208 | * | |
209 | * Caller must hold bond lock for read | |
210 | */ | |
cceb904f | 211 | static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) |
1da177e4 LT |
212 | { |
213 | struct slave *slave = NULL; | |
214 | int i; | |
215 | ||
216 | bond_for_each_slave(bond, slave, i) { | |
217 | if (slave->dev == slave_dev) { | |
218 | break; | |
219 | } | |
220 | } | |
221 | ||
222 | return slave; | |
223 | } | |
224 | ||
cceb904f | 225 | static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) |
1da177e4 LT |
226 | { |
227 | if (!slave || !slave->dev->master) { | |
228 | return NULL; | |
229 | } | |
230 | ||
231 | return (struct bonding *)slave->dev->master->priv; | |
232 | } | |
233 | ||
f5b2b966 JV |
234 | #define BOND_ARP_VALIDATE_NONE 0 |
235 | #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) | |
236 | #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) | |
237 | #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ | |
238 | BOND_ARP_VALIDATE_BACKUP) | |
239 | ||
079ca7da AB |
240 | static inline int slave_do_arp_validate(struct bonding *bond, |
241 | struct slave *slave) | |
f5b2b966 JV |
242 | { |
243 | return bond->params.arp_validate & (1 << slave->state); | |
244 | } | |
245 | ||
079ca7da | 246 | static inline unsigned long slave_last_rx(struct bonding *bond, |
f8a8ccd5 | 247 | struct slave *slave) |
f5b2b966 JV |
248 | { |
249 | if (slave_do_arp_validate(bond, slave)) | |
250 | return slave->last_arp_rx; | |
251 | ||
252 | return slave->dev->last_rx; | |
253 | } | |
254 | ||
cceb904f | 255 | static inline void bond_set_slave_inactive_flags(struct slave *slave) |
1da177e4 | 256 | { |
8f903c70 JV |
257 | struct bonding *bond = slave->dev->master->priv; |
258 | if (bond->params.mode != BOND_MODE_TLB && | |
259 | bond->params.mode != BOND_MODE_ALB) | |
260 | slave->state = BOND_STATE_BACKUP; | |
261 | slave->dev->priv_flags |= IFF_SLAVE_INACTIVE; | |
f5b2b966 JV |
262 | if (slave_do_arp_validate(bond, slave)) |
263 | slave->dev->priv_flags |= IFF_SLAVE_NEEDARP; | |
1da177e4 LT |
264 | } |
265 | ||
cceb904f | 266 | static inline void bond_set_slave_active_flags(struct slave *slave) |
1da177e4 LT |
267 | { |
268 | slave->state = BOND_STATE_ACTIVE; | |
f5b2b966 | 269 | slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP); |
8f903c70 JV |
270 | } |
271 | ||
272 | static inline void bond_set_master_3ad_flags(struct bonding *bond) | |
273 | { | |
274 | bond->dev->priv_flags |= IFF_MASTER_8023AD; | |
275 | } | |
276 | ||
277 | static inline void bond_unset_master_3ad_flags(struct bonding *bond) | |
278 | { | |
279 | bond->dev->priv_flags &= ~IFF_MASTER_8023AD; | |
280 | } | |
281 | ||
282 | static inline void bond_set_master_alb_flags(struct bonding *bond) | |
283 | { | |
284 | bond->dev->priv_flags |= IFF_MASTER_ALB; | |
285 | } | |
286 | ||
287 | static inline void bond_unset_master_alb_flags(struct bonding *bond) | |
288 | { | |
289 | bond->dev->priv_flags &= ~IFF_MASTER_ALB; | |
1da177e4 LT |
290 | } |
291 | ||
292 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); | |
293 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); | |
dfe60397 | 294 | int bond_create(char *name, struct bond_params *params, struct bonding **newbond); |
a77b5325 | 295 | void bond_deinit(struct net_device *bond_dev); |
b76cdba9 MW |
296 | int bond_create_sysfs(void); |
297 | void bond_destroy_sysfs(void); | |
298 | void bond_destroy_sysfs_entry(struct bonding *bond); | |
299 | int bond_create_sysfs_entry(struct bonding *bond); | |
300 | int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave); | |
301 | void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave); | |
a77b5325 MW |
302 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev); |
303 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); | |
a77b5325 MW |
304 | void bond_mii_monitor(struct net_device *bond_dev); |
305 | void bond_loadbalance_arp_mon(struct net_device *bond_dev); | |
306 | void bond_activebackup_arp_mon(struct net_device *bond_dev); | |
307 | void bond_set_mode_ops(struct bonding *bond, int mode); | |
308 | int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl); | |
a77b5325 MW |
309 | void bond_select_active_slave(struct bonding *bond); |
310 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active); | |
f5b2b966 JV |
311 | void bond_register_arp(struct bonding *); |
312 | void bond_unregister_arp(struct bonding *); | |
1da177e4 LT |
313 | |
314 | #endif /* _LINUX_BONDING_H */ | |
315 |