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> |
eaddcd76 | 24 | #include <linux/inetdevice.h> |
567b871e | 25 | #include <linux/etherdevice.h> |
1da177e4 LT |
26 | #include "bond_3ad.h" |
27 | #include "bond_alb.h" | |
28 | ||
ad246c99 BH |
29 | #define DRV_VERSION "3.7.1" |
30 | #define DRV_RELDATE "April 27, 2011" | |
1da177e4 LT |
31 | #define DRV_NAME "bonding" |
32 | #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver" | |
33 | ||
bd33acc3 AW |
34 | #define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n" |
35 | ||
1da177e4 LT |
36 | #define BOND_MAX_ARP_TARGETS 16 |
37 | ||
1da177e4 LT |
38 | #define IS_UP(dev) \ |
39 | ((((dev)->flags & IFF_UP) == IFF_UP) && \ | |
40 | netif_running(dev) && \ | |
41 | netif_carrier_ok(dev)) | |
42 | ||
1da177e4 LT |
43 | /* |
44 | * Checks whether slave is ready for transmit. | |
45 | */ | |
46 | #define SLAVE_IS_OK(slave) \ | |
47 | (((slave)->dev->flags & IFF_UP) && \ | |
48 | netif_running((slave)->dev) && \ | |
49 | ((slave)->link == BOND_LINK_UP) && \ | |
e30bc066 | 50 | bond_is_active_slave(slave)) |
1da177e4 LT |
51 | |
52 | ||
53 | #define USES_PRIMARY(mode) \ | |
54 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ | |
55 | ((mode) == BOND_MODE_TLB) || \ | |
56 | ((mode) == BOND_MODE_ALB)) | |
57 | ||
bb1d9123 AG |
58 | #define TX_QUEUE_OVERRIDE(mode) \ |
59 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ | |
60 | ((mode) == BOND_MODE_ROUNDROBIN)) | |
1da177e4 LT |
61 | /* |
62 | * Less bad way to call ioctl from within the kernel; this needs to be | |
63 | * done some other way to get the call out of interrupt context. | |
64 | * Needs "ioctl" variable to be supplied by calling context. | |
65 | */ | |
66 | #define IOCTL(dev, arg, cmd) ({ \ | |
67 | int res = 0; \ | |
68 | mm_segment_t fs = get_fs(); \ | |
69 | set_fs(get_ds()); \ | |
70 | res = ioctl(dev, arg, cmd); \ | |
71 | set_fs(fs); \ | |
72 | res; }) | |
73 | ||
74 | /** | |
75 | * bond_for_each_slave_from - iterate the slaves list from a starting point | |
76 | * @bond: the bond holding this list. | |
77 | * @pos: current slave. | |
78 | * @cnt: counter for max number of moves | |
79 | * @start: starting point. | |
80 | * | |
81 | * Caller must hold bond->lock | |
82 | */ | |
83 | #define bond_for_each_slave_from(bond, pos, cnt, start) \ | |
84 | for (cnt = 0, pos = start; \ | |
85 | cnt < (bond)->slave_cnt; \ | |
86 | cnt++, pos = (pos)->next) | |
87 | ||
88 | /** | |
89 | * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point | |
90 | * @bond: the bond holding this list. | |
91 | * @pos: current slave. | |
92 | * @cnt: counter for number max of moves | |
93 | * @start: start point. | |
94 | * @stop: stop point. | |
95 | * | |
96 | * Caller must hold bond->lock | |
97 | */ | |
98 | #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \ | |
99 | for (cnt = 0, pos = start; \ | |
100 | ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \ | |
101 | cnt++, pos = (pos)->next) | |
102 | ||
103 | /** | |
104 | * bond_for_each_slave - iterate the slaves list from head | |
105 | * @bond: the bond holding this list. | |
106 | * @pos: current slave. | |
107 | * @cnt: counter for max number of moves | |
108 | * | |
109 | * Caller must hold bond->lock | |
110 | */ | |
111 | #define bond_for_each_slave(bond, pos, cnt) \ | |
112 | bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave) | |
113 | ||
114 | ||
e843fa50 | 115 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 116 | extern atomic_t netpoll_block_tx; |
e843fa50 NH |
117 | |
118 | static inline void block_netpoll_tx(void) | |
119 | { | |
fb4fa76a | 120 | atomic_inc(&netpoll_block_tx); |
e843fa50 NH |
121 | } |
122 | ||
123 | static inline void unblock_netpoll_tx(void) | |
124 | { | |
fb4fa76a | 125 | atomic_dec(&netpoll_block_tx); |
e843fa50 NH |
126 | } |
127 | ||
128 | static inline int is_netpoll_tx_blocked(struct net_device *dev) | |
129 | { | |
080e4130 | 130 | if (unlikely(netpoll_tx_running(dev))) |
fb4fa76a | 131 | return atomic_read(&netpoll_block_tx); |
e843fa50 NH |
132 | return 0; |
133 | } | |
134 | #else | |
135 | #define block_netpoll_tx() | |
136 | #define unblock_netpoll_tx() | |
137 | #define is_netpoll_tx_blocked(dev) (0) | |
138 | #endif | |
139 | ||
1da177e4 LT |
140 | struct bond_params { |
141 | int mode; | |
169a3e66 | 142 | int xmit_policy; |
1da177e4 | 143 | int miimon; |
ad246c99 | 144 | u8 num_peer_notif; |
1da177e4 | 145 | int arp_interval; |
f5b2b966 | 146 | int arp_validate; |
1da177e4 | 147 | int use_carrier; |
dd957c57 | 148 | int fail_over_mac; |
1da177e4 LT |
149 | int updelay; |
150 | int downdelay; | |
151 | int lacp_fast; | |
655f8919 | 152 | unsigned int min_links; |
fd989c83 | 153 | int ad_select; |
1da177e4 | 154 | char primary[IFNAMSIZ]; |
a549952a | 155 | int primary_reselect; |
d3bb52b0 | 156 | __be32 arp_targets[BOND_MAX_ARP_TARGETS]; |
bb1d9123 | 157 | int tx_queues; |
ebd8e497 | 158 | int all_slaves_active; |
c2952c31 | 159 | int resend_igmp; |
1da177e4 LT |
160 | }; |
161 | ||
12479f9a MW |
162 | struct bond_parm_tbl { |
163 | char *modename; | |
164 | int mode; | |
165 | }; | |
166 | ||
ece95f7f JV |
167 | #define BOND_MAX_MODENAME_LEN 20 |
168 | ||
1da177e4 LT |
169 | struct vlan_entry { |
170 | struct list_head vlan_list; | |
171 | unsigned short vlan_id; | |
172 | }; | |
173 | ||
174 | struct slave { | |
e944ef79 | 175 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
176 | struct slave *next; |
177 | struct slave *prev; | |
35d48903 | 178 | struct bonding *bond; /* our master */ |
8bb5f96b | 179 | int delay; |
f8a8ccd5 AG |
180 | unsigned long jiffies; |
181 | unsigned long last_arp_rx; | |
1da177e4 | 182 | s8 link; /* one of BOND_LINK_XXXX */ |
b2220cad | 183 | s8 new_link; |
2d7011ca JP |
184 | u8 backup:1, /* indicates backup slave. Value corresponds with |
185 | BOND_STATE_ACTIVE and BOND_STATE_BACKUP */ | |
186 | inactive:1; /* indicates inactive slave */ | |
5d30530e | 187 | u8 duplex; |
3158bf7d | 188 | u32 original_mtu; |
1da177e4 | 189 | u32 link_failure_count; |
5d30530e | 190 | u32 speed; |
bb1d9123 | 191 | u16 queue_id; |
5d30530e | 192 | u8 perm_hwaddr[ETH_ALEN]; |
1da177e4 LT |
193 | struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */ |
194 | struct tlb_slave_info tlb_info; | |
8a8efa22 AW |
195 | #ifdef CONFIG_NET_POLL_CONTROLLER |
196 | struct netpoll *np; | |
197 | #endif | |
1da177e4 LT |
198 | }; |
199 | ||
b2220cad JV |
200 | /* |
201 | * Link pseudo-state only used internally by monitors | |
202 | */ | |
203 | #define BOND_LINK_NOCHANGE -1 | |
204 | ||
1da177e4 LT |
205 | /* |
206 | * Here are the locking policies for the two bonding locks: | |
207 | * | |
208 | * 1) Get bond->lock when reading/writing slave list. | |
209 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. | |
210 | * (It is unnecessary when the write-lock is put with bond->lock.) | |
211 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock | |
212 | * beforehand. | |
213 | */ | |
214 | struct bonding { | |
e944ef79 | 215 | struct net_device *dev; /* first - useful for panic debug */ |
1da177e4 LT |
216 | struct slave *first_slave; |
217 | struct slave *curr_active_slave; | |
218 | struct slave *current_arp_slave; | |
219 | struct slave *primary_slave; | |
a549952a | 220 | bool force_primary; |
1da177e4 | 221 | s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ |
de063b70 ED |
222 | int (*recv_probe)(const struct sk_buff *, struct bonding *, |
223 | struct slave *); | |
1da177e4 LT |
224 | rwlock_t lock; |
225 | rwlock_t curr_slave_lock; | |
ad246c99 | 226 | u8 send_peer_notif; |
d90a162a | 227 | s8 setup_by_slave; |
c2952c31 | 228 | s8 igmp_retrans; |
1da177e4 LT |
229 | #ifdef CONFIG_PROC_FS |
230 | struct proc_dir_entry *proc_entry; | |
231 | char proc_file_name[IFNAMSIZ]; | |
232 | #endif /* CONFIG_PROC_FS */ | |
233 | struct list_head bond_list; | |
22bedad3 | 234 | struct netdev_hw_addr_list mc_list; |
a361c83c | 235 | int (*xmit_hash_policy)(struct sk_buff *, int); |
cf5f9044 | 236 | u16 rr_tx_counter; |
1da177e4 LT |
237 | struct ad_bond_info ad_info; |
238 | struct alb_bond_info alb_info; | |
239 | struct bond_params params; | |
240 | struct list_head vlan_list; | |
1b76b316 JV |
241 | struct workqueue_struct *wq; |
242 | struct delayed_work mii_work; | |
243 | struct delayed_work arp_work; | |
244 | struct delayed_work alb_work; | |
245 | struct delayed_work ad_work; | |
5a37e8ca | 246 | struct delayed_work mcast_work; |
f073c7ca | 247 | #ifdef CONFIG_DEBUG_FS |
02582e9b | 248 | /* debugging support via debugfs */ |
f073c7ca TI |
249 | struct dentry *debug_dir; |
250 | #endif /* CONFIG_DEBUG_FS */ | |
1da177e4 LT |
251 | }; |
252 | ||
cc0e4070 JP |
253 | static inline bool bond_vlan_used(struct bonding *bond) |
254 | { | |
255 | return !list_empty(&bond->vlan_list); | |
256 | } | |
257 | ||
f1c1775a JP |
258 | #define bond_slave_get_rcu(dev) \ |
259 | ((struct slave *) rcu_dereference(dev->rx_handler_data)) | |
260 | ||
1da177e4 LT |
261 | /** |
262 | * Returns NULL if the net_device does not belong to any of the bond's slaves | |
263 | * | |
264 | * Caller must hold bond lock for read | |
265 | */ | |
4ec952b8 | 266 | static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, |
267 | struct net_device *slave_dev) | |
1da177e4 LT |
268 | { |
269 | struct slave *slave = NULL; | |
270 | int i; | |
271 | ||
272 | bond_for_each_slave(bond, slave, i) { | |
273 | if (slave->dev == slave_dev) { | |
af3e5bd5 | 274 | return slave; |
1da177e4 LT |
275 | } |
276 | } | |
277 | ||
4ec952b8 | 278 | return NULL; |
1da177e4 LT |
279 | } |
280 | ||
cceb904f | 281 | static inline struct bonding *bond_get_bond_by_slave(struct slave *slave) |
1da177e4 LT |
282 | { |
283 | if (!slave || !slave->dev->master) { | |
284 | return NULL; | |
285 | } | |
286 | ||
c04914af | 287 | return netdev_priv(slave->dev->master); |
1da177e4 LT |
288 | } |
289 | ||
58402054 HE |
290 | static inline bool bond_is_lb(const struct bonding *bond) |
291 | { | |
8e95a202 JP |
292 | return (bond->params.mode == BOND_MODE_TLB || |
293 | bond->params.mode == BOND_MODE_ALB); | |
58402054 HE |
294 | } |
295 | ||
e30bc066 JP |
296 | static inline void bond_set_active_slave(struct slave *slave) |
297 | { | |
298 | slave->backup = 0; | |
299 | } | |
300 | ||
301 | static inline void bond_set_backup_slave(struct slave *slave) | |
302 | { | |
303 | slave->backup = 1; | |
304 | } | |
305 | ||
306 | static inline int bond_slave_state(struct slave *slave) | |
307 | { | |
308 | return slave->backup; | |
309 | } | |
310 | ||
311 | static inline bool bond_is_active_slave(struct slave *slave) | |
312 | { | |
313 | return !bond_slave_state(slave); | |
314 | } | |
315 | ||
a549952a JP |
316 | #define BOND_PRI_RESELECT_ALWAYS 0 |
317 | #define BOND_PRI_RESELECT_BETTER 1 | |
318 | #define BOND_PRI_RESELECT_FAILURE 2 | |
319 | ||
3915c1e8 JV |
320 | #define BOND_FOM_NONE 0 |
321 | #define BOND_FOM_ACTIVE 1 | |
322 | #define BOND_FOM_FOLLOW 2 | |
323 | ||
f5b2b966 JV |
324 | #define BOND_ARP_VALIDATE_NONE 0 |
325 | #define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE) | |
326 | #define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP) | |
327 | #define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \ | |
328 | BOND_ARP_VALIDATE_BACKUP) | |
329 | ||
079ca7da AB |
330 | static inline int slave_do_arp_validate(struct bonding *bond, |
331 | struct slave *slave) | |
f5b2b966 | 332 | { |
e30bc066 | 333 | return bond->params.arp_validate & (1 << bond_slave_state(slave)); |
f5b2b966 JV |
334 | } |
335 | ||
079ca7da | 336 | static inline unsigned long slave_last_rx(struct bonding *bond, |
f8a8ccd5 | 337 | struct slave *slave) |
f5b2b966 JV |
338 | { |
339 | if (slave_do_arp_validate(bond, slave)) | |
340 | return slave->last_arp_rx; | |
341 | ||
342 | return slave->dev->last_rx; | |
343 | } | |
344 | ||
8a8efa22 AW |
345 | #ifdef CONFIG_NET_POLL_CONTROLLER |
346 | static inline void bond_netpoll_send_skb(const struct slave *slave, | |
347 | struct sk_buff *skb) | |
348 | { | |
349 | struct netpoll *np = slave->np; | |
350 | ||
351 | if (np) | |
352 | netpoll_send_skb(np, skb); | |
353 | } | |
354 | #else | |
355 | static inline void bond_netpoll_send_skb(const struct slave *slave, | |
356 | struct sk_buff *skb) | |
357 | { | |
358 | } | |
359 | #endif | |
360 | ||
cceb904f | 361 | static inline void bond_set_slave_inactive_flags(struct slave *slave) |
1da177e4 | 362 | { |
454d7c9b | 363 | struct bonding *bond = netdev_priv(slave->dev->master); |
ae63e808 | 364 | if (!bond_is_lb(bond)) |
e30bc066 | 365 | bond_set_backup_slave(slave); |
ebd8e497 | 366 | if (!bond->params.all_slaves_active) |
2d7011ca | 367 | slave->inactive = 1; |
1da177e4 LT |
368 | } |
369 | ||
cceb904f | 370 | static inline void bond_set_slave_active_flags(struct slave *slave) |
1da177e4 | 371 | { |
e30bc066 | 372 | bond_set_active_slave(slave); |
2d7011ca JP |
373 | slave->inactive = 0; |
374 | } | |
375 | ||
376 | static inline bool bond_is_slave_inactive(struct slave *slave) | |
377 | { | |
378 | return slave->inactive; | |
1da177e4 LT |
379 | } |
380 | ||
eaddcd76 AG |
381 | static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local) |
382 | { | |
383 | struct in_device *in_dev; | |
384 | __be32 addr = 0; | |
385 | ||
386 | rcu_read_lock(); | |
387 | in_dev = __in_dev_get_rcu(dev); | |
388 | ||
389 | if (in_dev) | |
390 | addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST); | |
391 | ||
392 | rcu_read_unlock(); | |
393 | return addr; | |
394 | } | |
395 | ||
4c22400a EB |
396 | struct bond_net; |
397 | ||
1da177e4 LT |
398 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); |
399 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); | |
ec87fd3b | 400 | int bond_create(struct net *net, const char *name); |
4c22400a EB |
401 | int bond_create_sysfs(struct bond_net *net); |
402 | void bond_destroy_sysfs(struct bond_net *net); | |
6151b3d4 | 403 | void bond_prepare_sysfs_group(struct bonding *bond); |
b76cdba9 MW |
404 | int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave); |
405 | void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave); | |
a77b5325 MW |
406 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev); |
407 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); | |
1b76b316 JV |
408 | void bond_mii_monitor(struct work_struct *); |
409 | void bond_loadbalance_arp_mon(struct work_struct *); | |
410 | void bond_activebackup_arp_mon(struct work_struct *); | |
a77b5325 | 411 | void bond_set_mode_ops(struct bonding *bond, int mode); |
325dcf7a | 412 | int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl); |
a77b5325 MW |
413 | void bond_select_active_slave(struct bonding *bond); |
414 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active); | |
f073c7ca TI |
415 | void bond_create_debugfs(void); |
416 | void bond_destroy_debugfs(void); | |
417 | void bond_debug_register(struct bonding *bond); | |
418 | void bond_debug_unregister(struct bonding *bond); | |
419 | void bond_debug_reregister(struct bonding *bond); | |
d30ee670 | 420 | const char *bond_mode_name(int mode); |
1da177e4 | 421 | |
ec87fd3b EB |
422 | struct bond_net { |
423 | struct net * net; /* Associated network namespace */ | |
424 | struct list_head dev_list; | |
425 | #ifdef CONFIG_PROC_FS | |
426 | struct proc_dir_entry * proc_dir; | |
427 | #endif | |
4c22400a | 428 | struct class_attribute class_attr_bonding_masters; |
ec87fd3b EB |
429 | }; |
430 | ||
bd33acc3 AW |
431 | #ifdef CONFIG_PROC_FS |
432 | void bond_create_proc_entry(struct bonding *bond); | |
433 | void bond_remove_proc_entry(struct bonding *bond); | |
434 | void bond_create_proc_dir(struct bond_net *bn); | |
435 | void bond_destroy_proc_dir(struct bond_net *bn); | |
436 | #else | |
437 | static inline void bond_create_proc_entry(struct bonding *bond) | |
438 | { | |
439 | } | |
440 | ||
441 | static inline void bond_remove_proc_entry(struct bonding *bond) | |
442 | { | |
443 | } | |
444 | ||
445 | static inline void bond_create_proc_dir(struct bond_net *bn) | |
446 | { | |
447 | } | |
448 | ||
449 | static inline void bond_destroy_proc_dir(struct bond_net *bn) | |
450 | { | |
451 | } | |
452 | #endif | |
453 | ||
567b871e | 454 | static inline struct slave *bond_slave_has_mac(struct bonding *bond, |
455 | const u8 *mac) | |
456 | { | |
457 | int i = 0; | |
458 | struct slave *tmp; | |
459 | ||
460 | bond_for_each_slave(bond, tmp, i) | |
461 | if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr)) | |
462 | return tmp; | |
463 | ||
464 | return NULL; | |
465 | } | |
bd33acc3 | 466 | |
b2259672 | 467 | /* exported from bond_main.c */ |
ec87fd3b | 468 | extern int bond_net_id; |
e97fd7c6 HE |
469 | extern const struct bond_parm_tbl bond_lacp_tbl[]; |
470 | extern const struct bond_parm_tbl bond_mode_tbl[]; | |
471 | extern const struct bond_parm_tbl xmit_hashtype_tbl[]; | |
472 | extern const struct bond_parm_tbl arp_validate_tbl[]; | |
473 | extern const struct bond_parm_tbl fail_over_mac_tbl[]; | |
a549952a | 474 | extern const struct bond_parm_tbl pri_reselect_tbl[]; |
b06715b7 HE |
475 | extern struct bond_parm_tbl ad_select_tbl[]; |
476 | ||
1da177e4 | 477 | #endif /* _LINUX_BONDING_H */ |