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 | ||
b59f9f74 JV |
25 | #define DRV_VERSION "3.3.0" |
26 | #define DRV_RELDATE "June 10, 2008" | |
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 \ | |
b39d66a8 | 35 | DRV_NAME ": %s() %d: " fmt, __func__, __LINE__ , ## args ) |
1da177e4 LT |
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 | 127 | int miimon; |
7893b249 | 128 | int num_grat_arp; |
1da177e4 | 129 | int arp_interval; |
f5b2b966 | 130 | int arp_validate; |
1da177e4 | 131 | int use_carrier; |
dd957c57 | 132 | int fail_over_mac; |
1da177e4 LT |
133 | int updelay; |
134 | int downdelay; | |
135 | int lacp_fast; | |
136 | char primary[IFNAMSIZ]; | |
d3bb52b0 | 137 | __be32 arp_targets[BOND_MAX_ARP_TARGETS]; |
1da177e4 LT |
138 | }; |
139 | ||
12479f9a MW |
140 | struct bond_parm_tbl { |
141 | char *modename; | |
142 | int mode; | |
143 | }; | |
144 | ||
ece95f7f JV |
145 | #define BOND_MAX_MODENAME_LEN 20 |
146 | ||
1da177e4 LT |
147 | struct vlan_entry { |
148 | struct list_head vlan_list; | |
d3bb52b0 | 149 | __be32 vlan_ip; |
1da177e4 LT |
150 | unsigned short vlan_id; |
151 | }; | |
152 | ||
153 | struct slave { | |
e944ef79 | 154 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
155 | struct slave *next; |
156 | struct slave *prev; | |
8bb5f96b | 157 | int delay; |
f8a8ccd5 AG |
158 | unsigned long jiffies; |
159 | unsigned long last_arp_rx; | |
1da177e4 | 160 | s8 link; /* one of BOND_LINK_XXXX */ |
b2220cad | 161 | s8 new_link; |
1da177e4 LT |
162 | s8 state; /* one of BOND_STATE_XXXX */ |
163 | u32 original_flags; | |
3158bf7d | 164 | u32 original_mtu; |
1da177e4 LT |
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 | ||
b2220cad JV |
173 | /* |
174 | * Link pseudo-state only used internally by monitors | |
175 | */ | |
176 | #define BOND_LINK_NOCHANGE -1 | |
177 | ||
1da177e4 LT |
178 | /* |
179 | * Here are the locking policies for the two bonding locks: | |
180 | * | |
181 | * 1) Get bond->lock when reading/writing slave list. | |
182 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. | |
183 | * (It is unnecessary when the write-lock is put with bond->lock.) | |
184 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock | |
185 | * beforehand. | |
186 | */ | |
187 | struct bonding { | |
e944ef79 | 188 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
189 | struct slave *first_slave; |
190 | struct slave *curr_active_slave; | |
191 | struct slave *current_arp_slave; | |
192 | struct slave *primary_slave; | |
193 | s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ | |
194 | rwlock_t lock; | |
195 | rwlock_t curr_slave_lock; | |
1da177e4 | 196 | s8 kill_timers; |
1053f62c | 197 | s8 send_grat_arp; |
d90a162a | 198 | s8 setup_by_slave; |
1da177e4 LT |
199 | struct net_device_stats stats; |
200 | #ifdef CONFIG_PROC_FS | |
201 | struct proc_dir_entry *proc_entry; | |
202 | char proc_file_name[IFNAMSIZ]; | |
203 | #endif /* CONFIG_PROC_FS */ | |
204 | struct list_head bond_list; | |
205 | struct dev_mc_list *mc_list; | |
169a3e66 | 206 | int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int); |
d3bb52b0 | 207 | __be32 master_ip; |
1da177e4 | 208 | u16 flags; |
cf5f9044 | 209 | u16 rr_tx_counter; |
1da177e4 LT |
210 | struct ad_bond_info ad_info; |
211 | struct alb_bond_info alb_info; | |
212 | struct bond_params params; | |
213 | struct list_head vlan_list; | |
214 | struct vlan_group *vlgrp; | |
f5b2b966 | 215 | struct packet_type arp_mon_pt; |
1b76b316 JV |
216 | struct workqueue_struct *wq; |
217 | struct delayed_work mii_work; | |
218 | struct delayed_work arp_work; | |
219 | struct delayed_work alb_work; | |
220 | struct delayed_work ad_work; | |
1da177e4 LT |
221 | }; |
222 | ||
223 | /** | |
224 | * Returns NULL if the net_device does not belong to any of the bond's slaves | |
225 | * | |
226 | * Caller must hold bond lock for read | |
227 | */ | |
cceb904f | 228 | static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) |
1da177e4 LT |
229 | { |
230 | struct slave *slave = NULL; | |
231 | int i; | |
232 | ||
233 | bond_for_each_slave(bond, slave, i) { | |
234 | if (slave->dev == slave_dev) { | |
235 | break; | |
236 | } | |
237 | } | |
238 | ||
239 | return slave; | |
240 | } | |
241 | ||
cceb904f | 242 | static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) |
1da177e4 LT |
243 | { |
244 | if (!slave || !slave->dev->master) { | |
245 | return NULL; | |
246 | } | |
247 | ||
248 | return (struct bonding *)slave->dev->master->priv; | |
249 | } | |
250 | ||
3915c1e8 JV |
251 | #define BOND_FOM_NONE 0 |
252 | #define BOND_FOM_ACTIVE 1 | |
253 | #define BOND_FOM_FOLLOW 2 | |
254 | ||
f5b2b966 JV |
255 | #define BOND_ARP_VALIDATE_NONE 0 |
256 | #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) | |
257 | #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) | |
258 | #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ | |
259 | BOND_ARP_VALIDATE_BACKUP) | |
260 | ||
079ca7da AB |
261 | static inline int slave_do_arp_validate(struct bonding *bond, |
262 | struct slave *slave) | |
f5b2b966 JV |
263 | { |
264 | return bond->params.arp_validate & (1 << slave->state); | |
265 | } | |
266 | ||
079ca7da | 267 | static inline unsigned long slave_last_rx(struct bonding *bond, |
f8a8ccd5 | 268 | struct slave *slave) |
f5b2b966 JV |
269 | { |
270 | if (slave_do_arp_validate(bond, slave)) | |
271 | return slave->last_arp_rx; | |
272 | ||
273 | return slave->dev->last_rx; | |
274 | } | |
275 | ||
cceb904f | 276 | static inline void bond_set_slave_inactive_flags(struct slave *slave) |
1da177e4 | 277 | { |
8f903c70 JV |
278 | struct bonding *bond = slave->dev->master->priv; |
279 | if (bond->params.mode != BOND_MODE_TLB && | |
280 | bond->params.mode != BOND_MODE_ALB) | |
281 | slave->state = BOND_STATE_BACKUP; | |
282 | slave->dev->priv_flags |= IFF_SLAVE_INACTIVE; | |
f5b2b966 JV |
283 | if (slave_do_arp_validate(bond, slave)) |
284 | slave->dev->priv_flags |= IFF_SLAVE_NEEDARP; | |
1da177e4 LT |
285 | } |
286 | ||
cceb904f | 287 | static inline void bond_set_slave_active_flags(struct slave *slave) |
1da177e4 LT |
288 | { |
289 | slave->state = BOND_STATE_ACTIVE; | |
f5b2b966 | 290 | slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP); |
8f903c70 JV |
291 | } |
292 | ||
293 | static inline void bond_set_master_3ad_flags(struct bonding *bond) | |
294 | { | |
295 | bond->dev->priv_flags |= IFF_MASTER_8023AD; | |
296 | } | |
297 | ||
298 | static inline void bond_unset_master_3ad_flags(struct bonding *bond) | |
299 | { | |
300 | bond->dev->priv_flags &= ~IFF_MASTER_8023AD; | |
301 | } | |
302 | ||
303 | static inline void bond_set_master_alb_flags(struct bonding *bond) | |
304 | { | |
305 | bond->dev->priv_flags |= IFF_MASTER_ALB; | |
306 | } | |
307 | ||
308 | static inline void bond_unset_master_alb_flags(struct bonding *bond) | |
309 | { | |
310 | bond->dev->priv_flags &= ~IFF_MASTER_ALB; | |
1da177e4 LT |
311 | } |
312 | ||
313 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); | |
314 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); | |
0dd646fe | 315 | int bond_create(char *name, struct bond_params *params); |
d90a162a MS |
316 | void bond_destroy(struct bonding *bond); |
317 | int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev); | |
b76cdba9 MW |
318 | int bond_create_sysfs(void); |
319 | void bond_destroy_sysfs(void); | |
320 | void bond_destroy_sysfs_entry(struct bonding *bond); | |
321 | int bond_create_sysfs_entry(struct bonding *bond); | |
322 | int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave); | |
323 | void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave); | |
a77b5325 MW |
324 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev); |
325 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); | |
1b76b316 JV |
326 | void bond_mii_monitor(struct work_struct *); |
327 | void bond_loadbalance_arp_mon(struct work_struct *); | |
328 | void bond_activebackup_arp_mon(struct work_struct *); | |
a77b5325 | 329 | void bond_set_mode_ops(struct bonding *bond, int mode); |
ece95f7f | 330 | int bond_parse_parm(const char *mode_arg, struct bond_parm_tbl *tbl); |
a77b5325 MW |
331 | void bond_select_active_slave(struct bonding *bond); |
332 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active); | |
f5b2b966 JV |
333 | void bond_register_arp(struct bonding *); |
334 | void bond_unregister_arp(struct bonding *); | |
1da177e4 | 335 | |
b2259672 BD |
336 | /* exported from bond_main.c */ |
337 | extern struct list_head bond_dev_list; | |
338 | extern struct bond_parm_tbl bond_lacp_tbl[]; | |
339 | extern struct bond_parm_tbl bond_mode_tbl[]; | |
340 | extern struct bond_parm_tbl xmit_hashtype_tbl[]; | |
341 | extern struct bond_parm_tbl arp_validate_tbl[]; | |
342 | extern struct bond_parm_tbl fail_over_mac_tbl[]; | |
343 | ||
1da177e4 LT |
344 | #endif /* _LINUX_BONDING_H */ |
345 |