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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 | ||
305d552a BH |
33 | extern struct list_head bond_dev_list; |
34 | ||
1da177e4 LT |
35 | #define IS_UP(dev) \ |
36 | ((((dev)->flags & IFF_UP) == IFF_UP) && \ | |
37 | netif_running(dev) && \ | |
38 | netif_carrier_ok(dev)) | |
39 | ||
40 | /* | |
41 | * Checks whether bond is ready for transmit. | |
42 | * | |
43 | * Caller must hold bond->lock | |
44 | */ | |
45 | #define BOND_IS_OK(bond) \ | |
46 | (((bond)->dev->flags & IFF_UP) && \ | |
47 | netif_running((bond)->dev) && \ | |
48 | ((bond)->slave_cnt > 0)) | |
49 | ||
50 | /* | |
51 | * Checks whether slave is ready for transmit. | |
52 | */ | |
53 | #define SLAVE_IS_OK(slave) \ | |
54 | (((slave)->dev->flags & IFF_UP) && \ | |
55 | netif_running((slave)->dev) && \ | |
56 | ((slave)->link == BOND_LINK_UP) && \ | |
57 | ((slave)->state == BOND_STATE_ACTIVE)) | |
58 | ||
59 | ||
60 | #define USES_PRIMARY(mode) \ | |
61 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ | |
62 | ((mode) == BOND_MODE_TLB) || \ | |
63 | ((mode) == BOND_MODE_ALB)) | |
64 | ||
65 | /* | |
66 | * Less bad way to call ioctl from within the kernel; this needs to be | |
67 | * done some other way to get the call out of interrupt context. | |
68 | * Needs "ioctl" variable to be supplied by calling context. | |
69 | */ | |
70 | #define IOCTL(dev, arg, cmd) ({ \ | |
71 | int res = 0; \ | |
72 | mm_segment_t fs = get_fs(); \ | |
73 | set_fs(get_ds()); \ | |
74 | res = ioctl(dev, arg, cmd); \ | |
75 | set_fs(fs); \ | |
76 | res; }) | |
77 | ||
78 | /** | |
79 | * bond_for_each_slave_from - iterate the slaves list from a starting point | |
80 | * @bond: the bond holding this list. | |
81 | * @pos: current slave. | |
82 | * @cnt: counter for max number of moves | |
83 | * @start: starting point. | |
84 | * | |
85 | * Caller must hold bond->lock | |
86 | */ | |
87 | #define bond_for_each_slave_from(bond, pos, cnt, start) \ | |
88 | for (cnt = 0, pos = start; \ | |
89 | cnt < (bond)->slave_cnt; \ | |
90 | cnt++, pos = (pos)->next) | |
91 | ||
92 | /** | |
93 | * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point | |
94 | * @bond: the bond holding this list. | |
95 | * @pos: current slave. | |
96 | * @cnt: counter for number max of moves | |
97 | * @start: start point. | |
98 | * @stop: stop point. | |
99 | * | |
100 | * Caller must hold bond->lock | |
101 | */ | |
102 | #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \ | |
103 | for (cnt = 0, pos = start; \ | |
104 | ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \ | |
105 | cnt++, pos = (pos)->next) | |
106 | ||
107 | /** | |
108 | * bond_for_each_slave - iterate the slaves list from head | |
109 | * @bond: the bond holding this list. | |
110 | * @pos: current slave. | |
111 | * @cnt: counter for max number of moves | |
112 | * | |
113 | * Caller must hold bond->lock | |
114 | */ | |
115 | #define bond_for_each_slave(bond, pos, cnt) \ | |
116 | bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave) | |
117 | ||
118 | ||
119 | struct bond_params { | |
120 | int mode; | |
169a3e66 | 121 | int xmit_policy; |
1da177e4 | 122 | int miimon; |
7893b249 | 123 | int num_grat_arp; |
305d552a | 124 | int num_unsol_na; |
1da177e4 | 125 | int arp_interval; |
f5b2b966 | 126 | int arp_validate; |
1da177e4 | 127 | int use_carrier; |
dd957c57 | 128 | int fail_over_mac; |
1da177e4 LT |
129 | int updelay; |
130 | int downdelay; | |
131 | int lacp_fast; | |
fd989c83 | 132 | int ad_select; |
1da177e4 | 133 | char primary[IFNAMSIZ]; |
a549952a | 134 | int primary_reselect; |
d3bb52b0 | 135 | __be32 arp_targets[BOND_MAX_ARP_TARGETS]; |
1da177e4 LT |
136 | }; |
137 | ||
12479f9a MW |
138 | struct bond_parm_tbl { |
139 | char *modename; | |
140 | int mode; | |
141 | }; | |
142 | ||
ece95f7f JV |
143 | #define BOND_MAX_MODENAME_LEN 20 |
144 | ||
1da177e4 LT |
145 | struct vlan_entry { |
146 | struct list_head vlan_list; | |
d3bb52b0 | 147 | __be32 vlan_ip; |
1da177e4 | 148 | unsigned short vlan_id; |
305d552a BH |
149 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
150 | struct in6_addr vlan_ipv6; | |
151 | #endif | |
1da177e4 LT |
152 | }; |
153 | ||
154 | struct slave { | |
e944ef79 | 155 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
156 | struct slave *next; |
157 | struct slave *prev; | |
8bb5f96b | 158 | int delay; |
f8a8ccd5 AG |
159 | unsigned long jiffies; |
160 | unsigned long last_arp_rx; | |
1da177e4 | 161 | s8 link; /* one of BOND_LINK_XXXX */ |
b2220cad | 162 | s8 new_link; |
1da177e4 LT |
163 | s8 state; /* one of BOND_STATE_XXXX */ |
164 | u32 original_flags; | |
3158bf7d | 165 | u32 original_mtu; |
1da177e4 | 166 | u32 link_failure_count; |
885a136c | 167 | u8 perm_hwaddr[ETH_ALEN]; |
1da177e4 LT |
168 | u16 speed; |
169 | u8 duplex; | |
1da177e4 LT |
170 | struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */ |
171 | struct tlb_slave_info tlb_info; | |
172 | }; | |
173 | ||
b2220cad JV |
174 | /* |
175 | * Link pseudo-state only used internally by monitors | |
176 | */ | |
177 | #define BOND_LINK_NOCHANGE -1 | |
178 | ||
1da177e4 LT |
179 | /* |
180 | * Here are the locking policies for the two bonding locks: | |
181 | * | |
182 | * 1) Get bond->lock when reading/writing slave list. | |
183 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. | |
184 | * (It is unnecessary when the write-lock is put with bond->lock.) | |
185 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock | |
186 | * beforehand. | |
187 | */ | |
188 | struct bonding { | |
e944ef79 | 189 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
190 | struct slave *first_slave; |
191 | struct slave *curr_active_slave; | |
192 | struct slave *current_arp_slave; | |
193 | struct slave *primary_slave; | |
a549952a | 194 | bool force_primary; |
1da177e4 LT |
195 | s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ |
196 | rwlock_t lock; | |
197 | rwlock_t curr_slave_lock; | |
1da177e4 | 198 | s8 kill_timers; |
1053f62c | 199 | s8 send_grat_arp; |
305d552a | 200 | s8 send_unsol_na; |
d90a162a | 201 | s8 setup_by_slave; |
1da177e4 LT |
202 | struct net_device_stats stats; |
203 | #ifdef CONFIG_PROC_FS | |
204 | struct proc_dir_entry *proc_entry; | |
205 | char proc_file_name[IFNAMSIZ]; | |
206 | #endif /* CONFIG_PROC_FS */ | |
207 | struct list_head bond_list; | |
208 | struct dev_mc_list *mc_list; | |
169a3e66 | 209 | int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int); |
d3bb52b0 | 210 | __be32 master_ip; |
1da177e4 | 211 | u16 flags; |
cf5f9044 | 212 | u16 rr_tx_counter; |
1da177e4 LT |
213 | struct ad_bond_info ad_info; |
214 | struct alb_bond_info alb_info; | |
215 | struct bond_params params; | |
216 | struct list_head vlan_list; | |
217 | struct vlan_group *vlgrp; | |
f5b2b966 | 218 | struct packet_type arp_mon_pt; |
1b76b316 JV |
219 | struct workqueue_struct *wq; |
220 | struct delayed_work mii_work; | |
221 | struct delayed_work arp_work; | |
222 | struct delayed_work alb_work; | |
223 | struct delayed_work ad_work; | |
305d552a BH |
224 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
225 | struct in6_addr master_ipv6; | |
226 | #endif | |
1da177e4 LT |
227 | }; |
228 | ||
229 | /** | |
230 | * Returns NULL if the net_device does not belong to any of the bond's slaves | |
231 | * | |
232 | * Caller must hold bond lock for read | |
233 | */ | |
cceb904f | 234 | static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) |
1da177e4 LT |
235 | { |
236 | struct slave *slave = NULL; | |
237 | int i; | |
238 | ||
239 | bond_for_each_slave(bond, slave, i) { | |
240 | if (slave->dev == slave_dev) { | |
241 | break; | |
242 | } | |
243 | } | |
244 | ||
245 | return slave; | |
246 | } | |
247 | ||
cceb904f | 248 | static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) |
1da177e4 LT |
249 | { |
250 | if (!slave || !slave->dev->master) { | |
251 | return NULL; | |
252 | } | |
253 | ||
454d7c9b | 254 | return (struct bonding *)netdev_priv(slave->dev->master); |
1da177e4 LT |
255 | } |
256 | ||
58402054 HE |
257 | static inline bool bond_is_lb(const struct bonding *bond) |
258 | { | |
259 | return bond->params.mode == BOND_MODE_TLB | |
260 | || bond->params.mode == BOND_MODE_ALB; | |
261 | } | |
262 | ||
a549952a JP |
263 | #define BOND_PRI_RESELECT_ALWAYS 0 |
264 | #define BOND_PRI_RESELECT_BETTER 1 | |
265 | #define BOND_PRI_RESELECT_FAILURE 2 | |
266 | ||
3915c1e8 JV |
267 | #define BOND_FOM_NONE 0 |
268 | #define BOND_FOM_ACTIVE 1 | |
269 | #define BOND_FOM_FOLLOW 2 | |
270 | ||
f5b2b966 JV |
271 | #define BOND_ARP_VALIDATE_NONE 0 |
272 | #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) | |
273 | #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) | |
274 | #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ | |
275 | BOND_ARP_VALIDATE_BACKUP) | |
276 | ||
079ca7da AB |
277 | static inline int slave_do_arp_validate(struct bonding *bond, |
278 | struct slave *slave) | |
f5b2b966 JV |
279 | { |
280 | return bond->params.arp_validate & (1 << slave->state); | |
281 | } | |
282 | ||
079ca7da | 283 | static inline unsigned long slave_last_rx(struct bonding *bond, |
f8a8ccd5 | 284 | struct slave *slave) |
f5b2b966 JV |
285 | { |
286 | if (slave_do_arp_validate(bond, slave)) | |
287 | return slave->last_arp_rx; | |
288 | ||
289 | return slave->dev->last_rx; | |
290 | } | |
291 | ||
cceb904f | 292 | static inline void bond_set_slave_inactive_flags(struct slave *slave) |
1da177e4 | 293 | { |
454d7c9b | 294 | struct bonding *bond = netdev_priv(slave->dev->master); |
ae63e808 | 295 | if (!bond_is_lb(bond)) |
8f903c70 JV |
296 | slave->state = BOND_STATE_BACKUP; |
297 | slave->dev->priv_flags |= IFF_SLAVE_INACTIVE; | |
f5b2b966 JV |
298 | if (slave_do_arp_validate(bond, slave)) |
299 | slave->dev->priv_flags |= IFF_SLAVE_NEEDARP; | |
1da177e4 LT |
300 | } |
301 | ||
cceb904f | 302 | static inline void bond_set_slave_active_flags(struct slave *slave) |
1da177e4 LT |
303 | { |
304 | slave->state = BOND_STATE_ACTIVE; | |
f5b2b966 | 305 | slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP); |
8f903c70 JV |
306 | } |
307 | ||
308 | static inline void bond_set_master_3ad_flags(struct bonding *bond) | |
309 | { | |
310 | bond->dev->priv_flags |= IFF_MASTER_8023AD; | |
311 | } | |
312 | ||
313 | static inline void bond_unset_master_3ad_flags(struct bonding *bond) | |
314 | { | |
315 | bond->dev->priv_flags &= ~IFF_MASTER_8023AD; | |
316 | } | |
317 | ||
318 | static inline void bond_set_master_alb_flags(struct bonding *bond) | |
319 | { | |
320 | bond->dev->priv_flags |= IFF_MASTER_ALB; | |
321 | } | |
322 | ||
323 | static inline void bond_unset_master_alb_flags(struct bonding *bond) | |
324 | { | |
325 | bond->dev->priv_flags &= ~IFF_MASTER_ALB; | |
1da177e4 LT |
326 | } |
327 | ||
328 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); | |
329 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); | |
d2991f75 | 330 | int bond_create(const char *name); |
d90a162a | 331 | int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev); |
b76cdba9 MW |
332 | int bond_create_sysfs(void); |
333 | void bond_destroy_sysfs(void); | |
334 | void bond_destroy_sysfs_entry(struct bonding *bond); | |
335 | int bond_create_sysfs_entry(struct bonding *bond); | |
336 | int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave); | |
337 | void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave); | |
a77b5325 MW |
338 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev); |
339 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); | |
1b76b316 JV |
340 | void bond_mii_monitor(struct work_struct *); |
341 | void bond_loadbalance_arp_mon(struct work_struct *); | |
342 | void bond_activebackup_arp_mon(struct work_struct *); | |
a77b5325 | 343 | void bond_set_mode_ops(struct bonding *bond, int mode); |
325dcf7a | 344 | int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl); |
a77b5325 MW |
345 | void bond_select_active_slave(struct bonding *bond); |
346 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active); | |
f5b2b966 JV |
347 | void bond_register_arp(struct bonding *); |
348 | void bond_unregister_arp(struct bonding *); | |
1da177e4 | 349 | |
b2259672 BD |
350 | /* exported from bond_main.c */ |
351 | extern struct list_head bond_dev_list; | |
e97fd7c6 HE |
352 | extern const struct bond_parm_tbl bond_lacp_tbl[]; |
353 | extern const struct bond_parm_tbl bond_mode_tbl[]; | |
354 | extern const struct bond_parm_tbl xmit_hashtype_tbl[]; | |
355 | extern const struct bond_parm_tbl arp_validate_tbl[]; | |
356 | extern const struct bond_parm_tbl fail_over_mac_tbl[]; | |
a549952a | 357 | extern const struct bond_parm_tbl pri_reselect_tbl[]; |
b06715b7 HE |
358 | extern struct bond_parm_tbl ad_select_tbl[]; |
359 | ||
305d552a BH |
360 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
361 | void bond_send_unsolicited_na(struct bonding *bond); | |
362 | void bond_register_ipv6_notifier(void); | |
363 | void bond_unregister_ipv6_notifier(void); | |
364 | #else | |
365 | static inline void bond_send_unsolicited_na(struct bonding *bond) | |
366 | { | |
367 | return; | |
368 | } | |
369 | static inline void bond_register_ipv6_notifier(void) | |
370 | { | |
371 | return; | |
372 | } | |
373 | static inline void bond_unregister_ipv6_notifier(void) | |
374 | { | |
375 | return; | |
376 | } | |
377 | #endif | |
378 | ||
1da177e4 LT |
379 | #endif /* _LINUX_BONDING_H */ |
380 |