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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> | |
e843fa50 | 21 | #include <linux/cpumask.h> |
305d552a | 22 | #include <linux/in6.h> |
8a8efa22 | 23 | #include <linux/netpoll.h> |
1da177e4 LT |
24 | #include "bond_3ad.h" |
25 | #include "bond_alb.h" | |
26 | ||
bb1d9123 AG |
27 | #define DRV_VERSION "3.7.0" |
28 | #define DRV_RELDATE "June 2, 2010" | |
1da177e4 LT |
29 | #define DRV_NAME "bonding" |
30 | #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver" | |
31 | ||
32 | #define BOND_MAX_ARP_TARGETS 16 | |
33 | ||
1da177e4 LT |
34 | #define IS_UP(dev) \ |
35 | ((((dev)->flags & IFF_UP) == IFF_UP) && \ | |
36 | netif_running(dev) && \ | |
37 | netif_carrier_ok(dev)) | |
38 | ||
39 | /* | |
40 | * Checks whether bond is ready for transmit. | |
41 | * | |
42 | * Caller must hold bond->lock | |
43 | */ | |
44 | #define BOND_IS_OK(bond) \ | |
45 | (((bond)->dev->flags & IFF_UP) && \ | |
46 | netif_running((bond)->dev) && \ | |
47 | ((bond)->slave_cnt > 0)) | |
48 | ||
49 | /* | |
50 | * Checks whether slave is ready for transmit. | |
51 | */ | |
52 | #define SLAVE_IS_OK(slave) \ | |
53 | (((slave)->dev->flags & IFF_UP) && \ | |
54 | netif_running((slave)->dev) && \ | |
55 | ((slave)->link == BOND_LINK_UP) && \ | |
56 | ((slave)->state == BOND_STATE_ACTIVE)) | |
57 | ||
58 | ||
59 | #define USES_PRIMARY(mode) \ | |
60 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ | |
61 | ((mode) == BOND_MODE_TLB) || \ | |
62 | ((mode) == BOND_MODE_ALB)) | |
63 | ||
bb1d9123 AG |
64 | #define TX_QUEUE_OVERRIDE(mode) \ |
65 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ | |
66 | ((mode) == BOND_MODE_ROUNDROBIN)) | |
1da177e4 LT |
67 | /* |
68 | * Less bad way to call ioctl from within the kernel; this needs to be | |
69 | * done some other way to get the call out of interrupt context. | |
70 | * Needs "ioctl" variable to be supplied by calling context. | |
71 | */ | |
72 | #define IOCTL(dev, arg, cmd) ({ \ | |
73 | int res = 0; \ | |
74 | mm_segment_t fs = get_fs(); \ | |
75 | set_fs(get_ds()); \ | |
76 | res = ioctl(dev, arg, cmd); \ | |
77 | set_fs(fs); \ | |
78 | res; }) | |
79 | ||
80 | /** | |
81 | * bond_for_each_slave_from - iterate the slaves list from a starting point | |
82 | * @bond: the bond holding this list. | |
83 | * @pos: current slave. | |
84 | * @cnt: counter for max number of moves | |
85 | * @start: starting point. | |
86 | * | |
87 | * Caller must hold bond->lock | |
88 | */ | |
89 | #define bond_for_each_slave_from(bond, pos, cnt, start) \ | |
90 | for (cnt = 0, pos = start; \ | |
91 | cnt < (bond)->slave_cnt; \ | |
92 | cnt++, pos = (pos)->next) | |
93 | ||
94 | /** | |
95 | * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point | |
96 | * @bond: the bond holding this list. | |
97 | * @pos: current slave. | |
98 | * @cnt: counter for number max of moves | |
99 | * @start: start point. | |
100 | * @stop: stop point. | |
101 | * | |
102 | * Caller must hold bond->lock | |
103 | */ | |
104 | #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \ | |
105 | for (cnt = 0, pos = start; \ | |
106 | ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \ | |
107 | cnt++, pos = (pos)->next) | |
108 | ||
109 | /** | |
110 | * bond_for_each_slave - iterate the slaves list from head | |
111 | * @bond: the bond holding this list. | |
112 | * @pos: current slave. | |
113 | * @cnt: counter for max number of moves | |
114 | * | |
115 | * Caller must hold bond->lock | |
116 | */ | |
117 | #define bond_for_each_slave(bond, pos, cnt) \ | |
118 | bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave) | |
119 | ||
120 | ||
e843fa50 | 121 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 122 | extern atomic_t netpoll_block_tx; |
e843fa50 NH |
123 | |
124 | static inline void block_netpoll_tx(void) | |
125 | { | |
fb4fa76a | 126 | atomic_inc(&netpoll_block_tx); |
e843fa50 NH |
127 | } |
128 | ||
129 | static inline void unblock_netpoll_tx(void) | |
130 | { | |
fb4fa76a | 131 | atomic_dec(&netpoll_block_tx); |
e843fa50 NH |
132 | } |
133 | ||
134 | static inline int is_netpoll_tx_blocked(struct net_device *dev) | |
135 | { | |
080e4130 | 136 | if (unlikely(netpoll_tx_running(dev))) |
fb4fa76a | 137 | return atomic_read(&netpoll_block_tx); |
e843fa50 NH |
138 | return 0; |
139 | } | |
140 | #else | |
141 | #define block_netpoll_tx() | |
142 | #define unblock_netpoll_tx() | |
143 | #define is_netpoll_tx_blocked(dev) (0) | |
144 | #endif | |
145 | ||
1da177e4 LT |
146 | struct bond_params { |
147 | int mode; | |
169a3e66 | 148 | int xmit_policy; |
1da177e4 | 149 | int miimon; |
7893b249 | 150 | int num_grat_arp; |
305d552a | 151 | int num_unsol_na; |
1da177e4 | 152 | int arp_interval; |
f5b2b966 | 153 | int arp_validate; |
1da177e4 | 154 | int use_carrier; |
dd957c57 | 155 | int fail_over_mac; |
1da177e4 LT |
156 | int updelay; |
157 | int downdelay; | |
158 | int lacp_fast; | |
fd989c83 | 159 | int ad_select; |
1da177e4 | 160 | char primary[IFNAMSIZ]; |
a549952a | 161 | int primary_reselect; |
d3bb52b0 | 162 | __be32 arp_targets[BOND_MAX_ARP_TARGETS]; |
bb1d9123 | 163 | int tx_queues; |
ebd8e497 | 164 | int all_slaves_active; |
c2952c31 | 165 | int resend_igmp; |
1da177e4 LT |
166 | }; |
167 | ||
12479f9a MW |
168 | struct bond_parm_tbl { |
169 | char *modename; | |
170 | int mode; | |
171 | }; | |
172 | ||
ece95f7f JV |
173 | #define BOND_MAX_MODENAME_LEN 20 |
174 | ||
1da177e4 LT |
175 | struct vlan_entry { |
176 | struct list_head vlan_list; | |
d3bb52b0 | 177 | __be32 vlan_ip; |
1da177e4 | 178 | unsigned short vlan_id; |
305d552a BH |
179 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
180 | struct in6_addr vlan_ipv6; | |
181 | #endif | |
1da177e4 LT |
182 | }; |
183 | ||
184 | struct slave { | |
e944ef79 | 185 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
186 | struct slave *next; |
187 | struct slave *prev; | |
8bb5f96b | 188 | int delay; |
f8a8ccd5 AG |
189 | unsigned long jiffies; |
190 | unsigned long last_arp_rx; | |
1da177e4 | 191 | s8 link; /* one of BOND_LINK_XXXX */ |
b2220cad | 192 | s8 new_link; |
1da177e4 | 193 | s8 state; /* one of BOND_STATE_XXXX */ |
3158bf7d | 194 | u32 original_mtu; |
1da177e4 | 195 | u32 link_failure_count; |
885a136c | 196 | u8 perm_hwaddr[ETH_ALEN]; |
1da177e4 LT |
197 | u16 speed; |
198 | u8 duplex; | |
bb1d9123 | 199 | u16 queue_id; |
1da177e4 LT |
200 | struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */ |
201 | struct tlb_slave_info tlb_info; | |
8a8efa22 AW |
202 | #ifdef CONFIG_NET_POLL_CONTROLLER |
203 | struct netpoll *np; | |
204 | #endif | |
1da177e4 LT |
205 | }; |
206 | ||
b2220cad JV |
207 | /* |
208 | * Link pseudo-state only used internally by monitors | |
209 | */ | |
210 | #define BOND_LINK_NOCHANGE -1 | |
211 | ||
1da177e4 LT |
212 | /* |
213 | * Here are the locking policies for the two bonding locks: | |
214 | * | |
215 | * 1) Get bond->lock when reading/writing slave list. | |
216 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. | |
217 | * (It is unnecessary when the write-lock is put with bond->lock.) | |
218 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock | |
219 | * beforehand. | |
220 | */ | |
221 | struct bonding { | |
e944ef79 | 222 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
223 | struct slave *first_slave; |
224 | struct slave *curr_active_slave; | |
225 | struct slave *current_arp_slave; | |
226 | struct slave *primary_slave; | |
a549952a | 227 | bool force_primary; |
1da177e4 LT |
228 | s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ |
229 | rwlock_t lock; | |
230 | rwlock_t curr_slave_lock; | |
1da177e4 | 231 | s8 kill_timers; |
1053f62c | 232 | s8 send_grat_arp; |
305d552a | 233 | s8 send_unsol_na; |
d90a162a | 234 | s8 setup_by_slave; |
c2952c31 | 235 | s8 igmp_retrans; |
1da177e4 LT |
236 | #ifdef CONFIG_PROC_FS |
237 | struct proc_dir_entry *proc_entry; | |
238 | char proc_file_name[IFNAMSIZ]; | |
239 | #endif /* CONFIG_PROC_FS */ | |
240 | struct list_head bond_list; | |
22bedad3 | 241 | struct netdev_hw_addr_list mc_list; |
a361c83c | 242 | int (*xmit_hash_policy)(struct sk_buff *, int); |
d3bb52b0 | 243 | __be32 master_ip; |
1da177e4 | 244 | u16 flags; |
cf5f9044 | 245 | u16 rr_tx_counter; |
1da177e4 LT |
246 | struct ad_bond_info ad_info; |
247 | struct alb_bond_info alb_info; | |
248 | struct bond_params params; | |
249 | struct list_head vlan_list; | |
250 | struct vlan_group *vlgrp; | |
f5b2b966 | 251 | struct packet_type arp_mon_pt; |
1b76b316 JV |
252 | struct workqueue_struct *wq; |
253 | struct delayed_work mii_work; | |
254 | struct delayed_work arp_work; | |
255 | struct delayed_work alb_work; | |
256 | struct delayed_work ad_work; | |
5a37e8ca | 257 | struct delayed_work mcast_work; |
305d552a BH |
258 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
259 | struct in6_addr master_ipv6; | |
260 | #endif | |
f073c7ca TI |
261 | #ifdef CONFIG_DEBUG_FS |
262 | /* debugging suport via debugfs */ | |
263 | struct dentry *debug_dir; | |
264 | #endif /* CONFIG_DEBUG_FS */ | |
1da177e4 LT |
265 | }; |
266 | ||
267 | /** | |
268 | * Returns NULL if the net_device does not belong to any of the bond's slaves | |
269 | * | |
270 | * Caller must hold bond lock for read | |
271 | */ | |
cceb904f | 272 | static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) |
1da177e4 LT |
273 | { |
274 | struct slave *slave = NULL; | |
275 | int i; | |
276 | ||
277 | bond_for_each_slave(bond, slave, i) { | |
278 | if (slave->dev == slave_dev) { | |
af3e5bd5 | 279 | return slave; |
1da177e4 LT |
280 | } |
281 | } | |
282 | ||
af3e5bd5 | 283 | return 0; |
1da177e4 LT |
284 | } |
285 | ||
cceb904f | 286 | static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) |
1da177e4 LT |
287 | { |
288 | if (!slave || !slave->dev->master) { | |
289 | return NULL; | |
290 | } | |
291 | ||
c04914af | 292 | return netdev_priv(slave->dev->master); |
1da177e4 LT |
293 | } |
294 | ||
58402054 HE |
295 | static inline bool bond_is_lb(const struct bonding *bond) |
296 | { | |
8e95a202 JP |
297 | return (bond->params.mode == BOND_MODE_TLB || |
298 | bond->params.mode == BOND_MODE_ALB); | |
58402054 HE |
299 | } |
300 | ||
a549952a JP |
301 | #define BOND_PRI_RESELECT_ALWAYS 0 |
302 | #define BOND_PRI_RESELECT_BETTER 1 | |
303 | #define BOND_PRI_RESELECT_FAILURE 2 | |
304 | ||
3915c1e8 JV |
305 | #define BOND_FOM_NONE 0 |
306 | #define BOND_FOM_ACTIVE 1 | |
307 | #define BOND_FOM_FOLLOW 2 | |
308 | ||
f5b2b966 JV |
309 | #define BOND_ARP_VALIDATE_NONE 0 |
310 | #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) | |
311 | #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) | |
312 | #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ | |
313 | BOND_ARP_VALIDATE_BACKUP) | |
314 | ||
079ca7da AB |
315 | static inline int slave_do_arp_validate(struct bonding *bond, |
316 | struct slave *slave) | |
f5b2b966 JV |
317 | { |
318 | return bond->params.arp_validate & (1 << slave->state); | |
319 | } | |
320 | ||
079ca7da | 321 | static inline unsigned long slave_last_rx(struct bonding *bond, |
f8a8ccd5 | 322 | struct slave *slave) |
f5b2b966 JV |
323 | { |
324 | if (slave_do_arp_validate(bond, slave)) | |
325 | return slave->last_arp_rx; | |
326 | ||
327 | return slave->dev->last_rx; | |
328 | } | |
329 | ||
8a8efa22 AW |
330 | #ifdef CONFIG_NET_POLL_CONTROLLER |
331 | static inline void bond_netpoll_send_skb(const struct slave *slave, | |
332 | struct sk_buff *skb) | |
333 | { | |
334 | struct netpoll *np = slave->np; | |
335 | ||
336 | if (np) | |
337 | netpoll_send_skb(np, skb); | |
338 | } | |
339 | #else | |
340 | static inline void bond_netpoll_send_skb(const struct slave *slave, | |
341 | struct sk_buff *skb) | |
342 | { | |
343 | } | |
344 | #endif | |
345 | ||
cceb904f | 346 | static inline void bond_set_slave_inactive_flags(struct slave *slave) |
1da177e4 | 347 | { |
454d7c9b | 348 | struct bonding *bond = netdev_priv(slave->dev->master); |
ae63e808 | 349 | if (!bond_is_lb(bond)) |
8f903c70 | 350 | slave->state = BOND_STATE_BACKUP; |
ebd8e497 AG |
351 | if (!bond->params.all_slaves_active) |
352 | slave->dev->priv_flags |= IFF_SLAVE_INACTIVE; | |
f5b2b966 JV |
353 | if (slave_do_arp_validate(bond, slave)) |
354 | slave->dev->priv_flags |= IFF_SLAVE_NEEDARP; | |
1da177e4 LT |
355 | } |
356 | ||
cceb904f | 357 | static inline void bond_set_slave_active_flags(struct slave *slave) |
1da177e4 LT |
358 | { |
359 | slave->state = BOND_STATE_ACTIVE; | |
f5b2b966 | 360 | slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP); |
8f903c70 JV |
361 | } |
362 | ||
363 | static inline void bond_set_master_3ad_flags(struct bonding *bond) | |
364 | { | |
365 | bond->dev->priv_flags |= IFF_MASTER_8023AD; | |
366 | } | |
367 | ||
368 | static inline void bond_unset_master_3ad_flags(struct bonding *bond) | |
369 | { | |
370 | bond->dev->priv_flags &= ~IFF_MASTER_8023AD; | |
371 | } | |
372 | ||
373 | static inline void bond_set_master_alb_flags(struct bonding *bond) | |
374 | { | |
375 | bond->dev->priv_flags |= IFF_MASTER_ALB; | |
376 | } | |
377 | ||
378 | static inline void bond_unset_master_alb_flags(struct bonding *bond) | |
379 | { | |
380 | bond->dev->priv_flags &= ~IFF_MASTER_ALB; | |
1da177e4 LT |
381 | } |
382 | ||
383 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); | |
384 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); | |
ec87fd3b | 385 | int bond_create(struct net *net, const char *name); |
b76cdba9 MW |
386 | int bond_create_sysfs(void); |
387 | void bond_destroy_sysfs(void); | |
6151b3d4 | 388 | void bond_prepare_sysfs_group(struct bonding *bond); |
b76cdba9 MW |
389 | int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave); |
390 | void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave); | |
a77b5325 MW |
391 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev); |
392 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); | |
1b76b316 JV |
393 | void bond_mii_monitor(struct work_struct *); |
394 | void bond_loadbalance_arp_mon(struct work_struct *); | |
395 | void bond_activebackup_arp_mon(struct work_struct *); | |
a77b5325 | 396 | void bond_set_mode_ops(struct bonding *bond, int mode); |
325dcf7a | 397 | int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl); |
a77b5325 MW |
398 | void bond_select_active_slave(struct bonding *bond); |
399 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active); | |
f5b2b966 JV |
400 | void bond_register_arp(struct bonding *); |
401 | void bond_unregister_arp(struct bonding *); | |
f073c7ca TI |
402 | void bond_create_debugfs(void); |
403 | void bond_destroy_debugfs(void); | |
404 | void bond_debug_register(struct bonding *bond); | |
405 | void bond_debug_unregister(struct bonding *bond); | |
406 | void bond_debug_reregister(struct bonding *bond); | |
1da177e4 | 407 | |
ec87fd3b EB |
408 | struct bond_net { |
409 | struct net * net; /* Associated network namespace */ | |
410 | struct list_head dev_list; | |
411 | #ifdef CONFIG_PROC_FS | |
412 | struct proc_dir_entry * proc_dir; | |
413 | #endif | |
414 | }; | |
415 | ||
b2259672 | 416 | /* exported from bond_main.c */ |
ec87fd3b | 417 | extern int bond_net_id; |
e97fd7c6 HE |
418 | extern const struct bond_parm_tbl bond_lacp_tbl[]; |
419 | extern const struct bond_parm_tbl bond_mode_tbl[]; | |
420 | extern const struct bond_parm_tbl xmit_hashtype_tbl[]; | |
421 | extern const struct bond_parm_tbl arp_validate_tbl[]; | |
422 | extern const struct bond_parm_tbl fail_over_mac_tbl[]; | |
a549952a | 423 | extern const struct bond_parm_tbl pri_reselect_tbl[]; |
b06715b7 HE |
424 | extern struct bond_parm_tbl ad_select_tbl[]; |
425 | ||
305d552a BH |
426 | #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) |
427 | void bond_send_unsolicited_na(struct bonding *bond); | |
428 | void bond_register_ipv6_notifier(void); | |
429 | void bond_unregister_ipv6_notifier(void); | |
430 | #else | |
431 | static inline void bond_send_unsolicited_na(struct bonding *bond) | |
432 | { | |
433 | return; | |
434 | } | |
435 | static inline void bond_register_ipv6_notifier(void) | |
436 | { | |
437 | return; | |
438 | } | |
439 | static inline void bond_unregister_ipv6_notifier(void) | |
440 | { | |
441 | return; | |
442 | } | |
443 | #endif | |
444 | ||
1da177e4 | 445 | #endif /* _LINUX_BONDING_H */ |