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> |
305d552a | 22 | #include <linux/in6.h> |
1da177e4 LT |
23 | #include "bond_3ad.h" |
24 | #include "bond_alb.h" | |
25 | ||
a549952a JP |
26 | #define DRV_VERSION "3.6.0" |
27 | #define DRV_RELDATE "September 26, 2009" | |
1da177e4 LT |
28 | #define DRV_NAME "bonding" |
29 | #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver" | |
30 | ||
31 | #define BOND_MAX_ARP_TARGETS 16 | |
32 | ||
1da177e4 LT |
33 | #define IS_UP(dev) \ |
34 | ((((dev)->flags & IFF_UP) == IFF_UP) && \ | |
35 | netif_running(dev) && \ | |
36 | netif_carrier_ok(dev)) | |
37 | ||
38 | /* | |
39 | * Checks whether bond is ready for transmit. | |
40 | * | |
41 | * Caller must hold bond->lock | |
42 | */ | |
43 | #define BOND_IS_OK(bond) \ | |
44 | (((bond)->dev->flags & IFF_UP) && \ | |
45 | netif_running((bond)->dev) && \ | |
46 | ((bond)->slave_cnt > 0)) | |
47 | ||
48 | /* | |
49 | * Checks whether slave is ready for transmit. | |
50 | */ | |
51 | #define SLAVE_IS_OK(slave) \ | |
52 | (((slave)->dev->flags & IFF_UP) && \ | |
53 | netif_running((slave)->dev) && \ | |
54 | ((slave)->link == BOND_LINK_UP) && \ | |
55 | ((slave)->state == BOND_STATE_ACTIVE)) | |
56 | ||
57 | ||
58 | #define USES_PRIMARY(mode) \ | |
59 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ | |
60 | ((mode) == BOND_MODE_TLB) || \ | |
61 | ((mode) == BOND_MODE_ALB)) | |
62 | ||
63 | /* | |
64 | * Less bad way to call ioctl from within the kernel; this needs to be | |
65 | * done some other way to get the call out of interrupt context. | |
66 | * Needs "ioctl" variable to be supplied by calling context. | |
67 | */ | |
68 | #define IOCTL(dev, arg, cmd) ({ \ | |
69 | int res = 0; \ | |
70 | mm_segment_t fs = get_fs(); \ | |
71 | set_fs(get_ds()); \ | |
72 | res = ioctl(dev, arg, cmd); \ | |
73 | set_fs(fs); \ | |
74 | res; }) | |
75 | ||
76 | /** | |
77 | * bond_for_each_slave_from - iterate the slaves list from a starting point | |
78 | * @bond: the bond holding this list. | |
79 | * @pos: current slave. | |
80 | * @cnt: counter for max number of moves | |
81 | * @start: starting point. | |
82 | * | |
83 | * Caller must hold bond->lock | |
84 | */ | |
85 | #define bond_for_each_slave_from(bond, pos, cnt, start) \ | |
86 | for (cnt = 0, pos = start; \ | |
87 | cnt < (bond)->slave_cnt; \ | |
88 | cnt++, pos = (pos)->next) | |
89 | ||
90 | /** | |
91 | * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point | |
92 | * @bond: the bond holding this list. | |
93 | * @pos: current slave. | |
94 | * @cnt: counter for number max of moves | |
95 | * @start: start point. | |
96 | * @stop: stop point. | |
97 | * | |
98 | * Caller must hold bond->lock | |
99 | */ | |
100 | #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \ | |
101 | for (cnt = 0, pos = start; \ | |
102 | ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \ | |
103 | cnt++, pos = (pos)->next) | |
104 | ||
105 | /** | |
106 | * bond_for_each_slave - iterate the slaves list from head | |
107 | * @bond: the bond holding this list. | |
108 | * @pos: current slave. | |
109 | * @cnt: counter for max number of moves | |
110 | * | |
111 | * Caller must hold bond->lock | |
112 | */ | |
113 | #define bond_for_each_slave(bond, pos, cnt) \ | |
114 | bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave) | |
115 | ||
116 | ||
117 | struct bond_params { | |
118 | int mode; | |
169a3e66 | 119 | int xmit_policy; |
1da177e4 | 120 | int miimon; |
7893b249 | 121 | int num_grat_arp; |
305d552a | 122 | int num_unsol_na; |
1da177e4 | 123 | int arp_interval; |
f5b2b966 | 124 | int arp_validate; |
1da177e4 | 125 | int use_carrier; |
dd957c57 | 126 | int fail_over_mac; |
1da177e4 LT |
127 | int updelay; |
128 | int downdelay; | |
129 | int lacp_fast; | |
fd989c83 | 130 | int ad_select; |
1da177e4 | 131 | char primary[IFNAMSIZ]; |
a549952a | 132 | int primary_reselect; |
d3bb52b0 | 133 | __be32 arp_targets[BOND_MAX_ARP_TARGETS]; |
1da177e4 LT |
134 | }; |
135 | ||
12479f9a MW |
136 | struct bond_parm_tbl { |
137 | char *modename; | |
138 | int mode; | |
139 | }; | |
140 | ||
ece95f7f JV |
141 | #define BOND_MAX_MODENAME_LEN 20 |
142 | ||
1da177e4 LT |
143 | struct vlan_entry { |
144 | struct list_head vlan_list; | |
d3bb52b0 | 145 | __be32 vlan_ip; |
1da177e4 | 146 | unsigned short vlan_id; |
305d552a BH |
147 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
148 | struct in6_addr vlan_ipv6; | |
149 | #endif | |
1da177e4 LT |
150 | }; |
151 | ||
152 | struct slave { | |
e944ef79 | 153 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
154 | struct slave *next; |
155 | struct slave *prev; | |
8bb5f96b | 156 | int delay; |
f8a8ccd5 AG |
157 | unsigned long jiffies; |
158 | unsigned long last_arp_rx; | |
1da177e4 | 159 | s8 link; /* one of BOND_LINK_XXXX */ |
b2220cad | 160 | s8 new_link; |
1da177e4 LT |
161 | s8 state; /* one of BOND_STATE_XXXX */ |
162 | u32 original_flags; | |
3158bf7d | 163 | u32 original_mtu; |
1da177e4 | 164 | u32 link_failure_count; |
885a136c | 165 | u8 perm_hwaddr[ETH_ALEN]; |
1da177e4 LT |
166 | u16 speed; |
167 | u8 duplex; | |
1da177e4 LT |
168 | struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */ |
169 | struct tlb_slave_info tlb_info; | |
170 | }; | |
171 | ||
b2220cad JV |
172 | /* |
173 | * Link pseudo-state only used internally by monitors | |
174 | */ | |
175 | #define BOND_LINK_NOCHANGE -1 | |
176 | ||
1da177e4 LT |
177 | /* |
178 | * Here are the locking policies for the two bonding locks: | |
179 | * | |
180 | * 1) Get bond->lock when reading/writing slave list. | |
181 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. | |
182 | * (It is unnecessary when the write-lock is put with bond->lock.) | |
183 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock | |
184 | * beforehand. | |
185 | */ | |
186 | struct bonding { | |
e944ef79 | 187 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
188 | struct slave *first_slave; |
189 | struct slave *curr_active_slave; | |
190 | struct slave *current_arp_slave; | |
191 | struct slave *primary_slave; | |
a549952a | 192 | bool force_primary; |
1da177e4 LT |
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; |
305d552a | 198 | s8 send_unsol_na; |
d90a162a | 199 | s8 setup_by_slave; |
1da177e4 LT |
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; | |
22bedad3 | 205 | struct netdev_hw_addr_list mc_list; |
a361c83c | 206 | int (*xmit_hash_policy)(struct sk_buff *, 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; | |
305d552a BH |
221 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
222 | struct in6_addr master_ipv6; | |
223 | #endif | |
1da177e4 LT |
224 | }; |
225 | ||
226 | /** | |
227 | * Returns NULL if the net_device does not belong to any of the bond's slaves | |
228 | * | |
229 | * Caller must hold bond lock for read | |
230 | */ | |
cceb904f | 231 | static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) |
1da177e4 LT |
232 | { |
233 | struct slave *slave = NULL; | |
234 | int i; | |
235 | ||
236 | bond_for_each_slave(bond, slave, i) { | |
237 | if (slave->dev == slave_dev) { | |
238 | break; | |
239 | } | |
240 | } | |
241 | ||
242 | return slave; | |
243 | } | |
244 | ||
cceb904f | 245 | static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) |
1da177e4 LT |
246 | { |
247 | if (!slave || !slave->dev->master) { | |
248 | return NULL; | |
249 | } | |
250 | ||
454d7c9b | 251 | return (struct bonding *)netdev_priv(slave->dev->master); |
1da177e4 LT |
252 | } |
253 | ||
58402054 HE |
254 | static inline bool bond_is_lb(const struct bonding *bond) |
255 | { | |
8e95a202 JP |
256 | return (bond->params.mode == BOND_MODE_TLB || |
257 | bond->params.mode == BOND_MODE_ALB); | |
58402054 HE |
258 | } |
259 | ||
a549952a JP |
260 | #define BOND_PRI_RESELECT_ALWAYS 0 |
261 | #define BOND_PRI_RESELECT_BETTER 1 | |
262 | #define BOND_PRI_RESELECT_FAILURE 2 | |
263 | ||
3915c1e8 JV |
264 | #define BOND_FOM_NONE 0 |
265 | #define BOND_FOM_ACTIVE 1 | |
266 | #define BOND_FOM_FOLLOW 2 | |
267 | ||
f5b2b966 JV |
268 | #define BOND_ARP_VALIDATE_NONE 0 |
269 | #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) | |
270 | #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) | |
271 | #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ | |
272 | BOND_ARP_VALIDATE_BACKUP) | |
273 | ||
079ca7da AB |
274 | static inline int slave_do_arp_validate(struct bonding *bond, |
275 | struct slave *slave) | |
f5b2b966 JV |
276 | { |
277 | return bond->params.arp_validate & (1 << slave->state); | |
278 | } | |
279 | ||
079ca7da | 280 | static inline unsigned long slave_last_rx(struct bonding *bond, |
f8a8ccd5 | 281 | struct slave *slave) |
f5b2b966 JV |
282 | { |
283 | if (slave_do_arp_validate(bond, slave)) | |
284 | return slave->last_arp_rx; | |
285 | ||
286 | return slave->dev->last_rx; | |
287 | } | |
288 | ||
cceb904f | 289 | static inline void bond_set_slave_inactive_flags(struct slave *slave) |
1da177e4 | 290 | { |
454d7c9b | 291 | struct bonding *bond = netdev_priv(slave->dev->master); |
ae63e808 | 292 | if (!bond_is_lb(bond)) |
8f903c70 JV |
293 | slave->state = BOND_STATE_BACKUP; |
294 | slave->dev->priv_flags |= IFF_SLAVE_INACTIVE; | |
f5b2b966 JV |
295 | if (slave_do_arp_validate(bond, slave)) |
296 | slave->dev->priv_flags |= IFF_SLAVE_NEEDARP; | |
1da177e4 LT |
297 | } |
298 | ||
cceb904f | 299 | static inline void bond_set_slave_active_flags(struct slave *slave) |
1da177e4 LT |
300 | { |
301 | slave->state = BOND_STATE_ACTIVE; | |
f5b2b966 | 302 | slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP); |
8f903c70 JV |
303 | } |
304 | ||
305 | static inline void bond_set_master_3ad_flags(struct bonding *bond) | |
306 | { | |
307 | bond->dev->priv_flags |= IFF_MASTER_8023AD; | |
308 | } | |
309 | ||
310 | static inline void bond_unset_master_3ad_flags(struct bonding *bond) | |
311 | { | |
312 | bond->dev->priv_flags &= ~IFF_MASTER_8023AD; | |
313 | } | |
314 | ||
315 | static inline void bond_set_master_alb_flags(struct bonding *bond) | |
316 | { | |
317 | bond->dev->priv_flags |= IFF_MASTER_ALB; | |
318 | } | |
319 | ||
320 | static inline void bond_unset_master_alb_flags(struct bonding *bond) | |
321 | { | |
322 | bond->dev->priv_flags &= ~IFF_MASTER_ALB; | |
1da177e4 LT |
323 | } |
324 | ||
325 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); | |
326 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); | |
ec87fd3b | 327 | int bond_create(struct net *net, const char *name); |
d90a162a | 328 | int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev); |
b76cdba9 MW |
329 | int bond_create_sysfs(void); |
330 | void bond_destroy_sysfs(void); | |
6151b3d4 | 331 | void bond_prepare_sysfs_group(struct bonding *bond); |
b76cdba9 MW |
332 | int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave); |
333 | void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave); | |
a77b5325 MW |
334 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev); |
335 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); | |
1b76b316 JV |
336 | void bond_mii_monitor(struct work_struct *); |
337 | void bond_loadbalance_arp_mon(struct work_struct *); | |
338 | void bond_activebackup_arp_mon(struct work_struct *); | |
a77b5325 | 339 | void bond_set_mode_ops(struct bonding *bond, int mode); |
325dcf7a | 340 | int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl); |
a77b5325 MW |
341 | void bond_select_active_slave(struct bonding *bond); |
342 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active); | |
f5b2b966 JV |
343 | void bond_register_arp(struct bonding *); |
344 | void bond_unregister_arp(struct bonding *); | |
1da177e4 | 345 | |
ec87fd3b EB |
346 | struct bond_net { |
347 | struct net * net; /* Associated network namespace */ | |
348 | struct list_head dev_list; | |
349 | #ifdef CONFIG_PROC_FS | |
350 | struct proc_dir_entry * proc_dir; | |
351 | #endif | |
352 | }; | |
353 | ||
b2259672 | 354 | /* exported from bond_main.c */ |
ec87fd3b | 355 | extern int bond_net_id; |
e97fd7c6 HE |
356 | extern const struct bond_parm_tbl bond_lacp_tbl[]; |
357 | extern const struct bond_parm_tbl bond_mode_tbl[]; | |
358 | extern const struct bond_parm_tbl xmit_hashtype_tbl[]; | |
359 | extern const struct bond_parm_tbl arp_validate_tbl[]; | |
360 | extern const struct bond_parm_tbl fail_over_mac_tbl[]; | |
a549952a | 361 | extern const struct bond_parm_tbl pri_reselect_tbl[]; |
b06715b7 HE |
362 | extern struct bond_parm_tbl ad_select_tbl[]; |
363 | ||
305d552a BH |
364 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
365 | void bond_send_unsolicited_na(struct bonding *bond); | |
366 | void bond_register_ipv6_notifier(void); | |
367 | void bond_unregister_ipv6_notifier(void); | |
368 | #else | |
369 | static inline void bond_send_unsolicited_na(struct bonding *bond) | |
370 | { | |
371 | return; | |
372 | } | |
373 | static inline void bond_register_ipv6_notifier(void) | |
374 | { | |
375 | return; | |
376 | } | |
377 | static inline void bond_unregister_ipv6_notifier(void) | |
378 | { | |
379 | return; | |
380 | } | |
381 | #endif | |
382 | ||
1da177e4 | 383 | #endif /* _LINUX_BONDING_H */ |