Commit | Line | Data |
---|---|---|
72be35fe JP |
1 | /* |
2 | * drivers/net/bond/bond_options.c - bonding options | |
3 | * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> | |
eecdaa6e | 4 | * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> |
72be35fe JP |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | */ | |
11 | ||
12 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | |
13 | ||
14 | #include <linux/errno.h> | |
15 | #include <linux/if.h> | |
d9e32b21 JP |
16 | #include <linux/netdevice.h> |
17 | #include <linux/rwlock.h> | |
18 | #include <linux/rcupdate.h> | |
72be35fe JP |
19 | #include "bonding.h" |
20 | ||
21 | static bool bond_mode_is_valid(int mode) | |
22 | { | |
23 | int i; | |
24 | ||
25 | for (i = 0; bond_mode_tbl[i].modename; i++); | |
26 | ||
27 | return mode >= 0 && mode < i; | |
28 | } | |
29 | ||
30 | int bond_option_mode_set(struct bonding *bond, int mode) | |
31 | { | |
32 | if (!bond_mode_is_valid(mode)) { | |
33 | pr_err("invalid mode value %d.\n", mode); | |
34 | return -EINVAL; | |
35 | } | |
36 | ||
37 | if (bond->dev->flags & IFF_UP) { | |
38 | pr_err("%s: unable to update mode because interface is up.\n", | |
39 | bond->dev->name); | |
40 | return -EPERM; | |
41 | } | |
42 | ||
43 | if (bond_has_slaves(bond)) { | |
44 | pr_err("%s: unable to update mode because bond has slaves.\n", | |
45 | bond->dev->name); | |
46 | return -EPERM; | |
47 | } | |
48 | ||
fe9d04af | 49 | if (BOND_NO_USES_ARP(mode) && bond->params.arp_interval) { |
50 | pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n", | |
51 | bond->dev->name, bond_mode_tbl[mode].modename); | |
52 | /* disable arp monitoring */ | |
53 | bond->params.arp_interval = 0; | |
54 | /* set miimon to default value */ | |
55 | bond->params.miimon = BOND_DEFAULT_MIIMON; | |
56 | pr_info("%s: Setting MII monitoring interval to %d.\n", | |
57 | bond->dev->name, bond->params.miimon); | |
72be35fe JP |
58 | } |
59 | ||
60 | /* don't cache arp_validate between modes */ | |
61 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; | |
62 | bond->params.mode = mode; | |
63 | return 0; | |
64 | } | |
d9e32b21 | 65 | |
752d48b5 JP |
66 | static struct net_device *__bond_option_active_slave_get(struct bonding *bond, |
67 | struct slave *slave) | |
68 | { | |
69 | return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL; | |
70 | } | |
71 | ||
72 | struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) | |
73 | { | |
74 | struct slave *slave = rcu_dereference(bond->curr_active_slave); | |
75 | ||
76 | return __bond_option_active_slave_get(bond, slave); | |
77 | } | |
78 | ||
79 | struct net_device *bond_option_active_slave_get(struct bonding *bond) | |
80 | { | |
81 | return __bond_option_active_slave_get(bond, bond->curr_active_slave); | |
82 | } | |
83 | ||
d9e32b21 JP |
84 | int bond_option_active_slave_set(struct bonding *bond, |
85 | struct net_device *slave_dev) | |
86 | { | |
87 | int ret = 0; | |
88 | ||
89 | if (slave_dev) { | |
90 | if (!netif_is_bond_slave(slave_dev)) { | |
91 | pr_err("Device %s is not bonding slave.\n", | |
92 | slave_dev->name); | |
93 | return -EINVAL; | |
94 | } | |
95 | ||
96 | if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { | |
97 | pr_err("%s: Device %s is not our slave.\n", | |
98 | bond->dev->name, slave_dev->name); | |
99 | return -EINVAL; | |
100 | } | |
101 | } | |
102 | ||
103 | if (!USES_PRIMARY(bond->params.mode)) { | |
104 | pr_err("%s: Unable to change active slave; %s is in mode %d\n", | |
105 | bond->dev->name, bond->dev->name, bond->params.mode); | |
106 | return -EINVAL; | |
107 | } | |
108 | ||
109 | block_netpoll_tx(); | |
d9e32b21 JP |
110 | write_lock_bh(&bond->curr_slave_lock); |
111 | ||
112 | /* check to see if we are clearing active */ | |
113 | if (!slave_dev) { | |
114 | pr_info("%s: Clearing current active slave.\n", | |
115 | bond->dev->name); | |
116 | rcu_assign_pointer(bond->curr_active_slave, NULL); | |
117 | bond_select_active_slave(bond); | |
118 | } else { | |
119 | struct slave *old_active = bond->curr_active_slave; | |
120 | struct slave *new_active = bond_slave_get_rtnl(slave_dev); | |
121 | ||
122 | BUG_ON(!new_active); | |
123 | ||
124 | if (new_active == old_active) { | |
125 | /* do nothing */ | |
126 | pr_info("%s: %s is already the current active slave.\n", | |
127 | bond->dev->name, new_active->dev->name); | |
128 | } else { | |
129 | if (old_active && (new_active->link == BOND_LINK_UP) && | |
130 | IS_UP(new_active->dev)) { | |
131 | pr_info("%s: Setting %s as active slave.\n", | |
132 | bond->dev->name, new_active->dev->name); | |
133 | bond_change_active_slave(bond, new_active); | |
134 | } else { | |
135 | pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n", | |
136 | bond->dev->name, new_active->dev->name, | |
137 | new_active->dev->name); | |
138 | ret = -EINVAL; | |
139 | } | |
140 | } | |
141 | } | |
142 | ||
143 | write_unlock_bh(&bond->curr_slave_lock); | |
d9e32b21 JP |
144 | unblock_netpoll_tx(); |
145 | return ret; | |
146 | } | |
eecdaa6e | 147 | |
148 | int bond_option_miimon_set(struct bonding *bond, int miimon) | |
149 | { | |
150 | if (miimon < 0) { | |
151 | pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n", | |
152 | bond->dev->name, miimon, 0, INT_MAX); | |
153 | return -EINVAL; | |
154 | } | |
155 | pr_info("%s: Setting MII monitoring interval to %d.\n", | |
156 | bond->dev->name, miimon); | |
157 | bond->params.miimon = miimon; | |
158 | if (bond->params.updelay) | |
159 | pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n", | |
160 | bond->dev->name, | |
161 | bond->params.updelay * bond->params.miimon); | |
162 | if (bond->params.downdelay) | |
163 | pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n", | |
164 | bond->dev->name, | |
165 | bond->params.downdelay * bond->params.miimon); | |
166 | if (miimon && bond->params.arp_interval) { | |
167 | pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n", | |
168 | bond->dev->name); | |
169 | bond->params.arp_interval = 0; | |
170 | if (bond->params.arp_validate) | |
171 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; | |
172 | } | |
173 | if (bond->dev->flags & IFF_UP) { | |
174 | /* If the interface is up, we may need to fire off | |
175 | * the MII timer. If the interface is down, the | |
176 | * timer will get fired off when the open function | |
177 | * is called. | |
178 | */ | |
179 | if (!miimon) { | |
180 | cancel_delayed_work_sync(&bond->mii_work); | |
181 | } else { | |
182 | cancel_delayed_work_sync(&bond->arp_work); | |
183 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
184 | } | |
185 | } | |
186 | return 0; | |
187 | } | |
25852e29 | 188 | |
189 | int bond_option_updelay_set(struct bonding *bond, int updelay) | |
190 | { | |
191 | if (!(bond->params.miimon)) { | |
192 | pr_err("%s: Unable to set up delay as MII monitoring is disabled\n", | |
193 | bond->dev->name); | |
194 | return -EPERM; | |
195 | } | |
196 | ||
197 | if (updelay < 0) { | |
198 | pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n", | |
199 | bond->dev->name, updelay, 0, INT_MAX); | |
200 | return -EINVAL; | |
201 | } else { | |
202 | if ((updelay % bond->params.miimon) != 0) { | |
203 | pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", | |
204 | bond->dev->name, updelay, | |
205 | bond->params.miimon, | |
206 | (updelay / bond->params.miimon) * | |
207 | bond->params.miimon); | |
208 | } | |
209 | bond->params.updelay = updelay / bond->params.miimon; | |
210 | pr_info("%s: Setting up delay to %d.\n", | |
211 | bond->dev->name, | |
212 | bond->params.updelay * bond->params.miimon); | |
213 | } | |
214 | ||
215 | return 0; | |
216 | } | |
c7461f9b | 217 | |
218 | int bond_option_downdelay_set(struct bonding *bond, int downdelay) | |
219 | { | |
220 | if (!(bond->params.miimon)) { | |
221 | pr_err("%s: Unable to set down delay as MII monitoring is disabled\n", | |
222 | bond->dev->name); | |
223 | return -EPERM; | |
224 | } | |
225 | ||
226 | if (downdelay < 0) { | |
227 | pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n", | |
228 | bond->dev->name, downdelay, 0, INT_MAX); | |
229 | return -EINVAL; | |
230 | } else { | |
231 | if ((downdelay % bond->params.miimon) != 0) { | |
232 | pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n", | |
233 | bond->dev->name, downdelay, | |
234 | bond->params.miimon, | |
235 | (downdelay / bond->params.miimon) * | |
236 | bond->params.miimon); | |
237 | } | |
238 | bond->params.downdelay = downdelay / bond->params.miimon; | |
239 | pr_info("%s: Setting down delay to %d.\n", | |
240 | bond->dev->name, | |
241 | bond->params.downdelay * bond->params.miimon); | |
242 | } | |
243 | ||
244 | return 0; | |
245 | } | |
9f53e14e | 246 | |
247 | int bond_option_use_carrier_set(struct bonding *bond, int use_carrier) | |
248 | { | |
249 | if ((use_carrier == 0) || (use_carrier == 1)) { | |
250 | bond->params.use_carrier = use_carrier; | |
251 | pr_info("%s: Setting use_carrier to %d.\n", | |
252 | bond->dev->name, use_carrier); | |
253 | } else { | |
254 | pr_info("%s: Ignoring invalid use_carrier value %d.\n", | |
255 | bond->dev->name, use_carrier); | |
256 | } | |
257 | ||
258 | return 0; | |
259 | } | |
06151dbc | 260 | |
261 | int bond_option_arp_interval_set(struct bonding *bond, int arp_interval) | |
262 | { | |
263 | if (arp_interval < 0) { | |
264 | pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n", | |
265 | bond->dev->name, arp_interval, INT_MAX); | |
266 | return -EINVAL; | |
267 | } | |
268 | if (BOND_NO_USES_ARP(bond->params.mode)) { | |
269 | pr_info("%s: ARP monitoring cannot be used with ALB/TLB/802.3ad. Only MII monitoring is supported on %s.\n", | |
270 | bond->dev->name, bond->dev->name); | |
271 | return -EINVAL; | |
272 | } | |
273 | pr_info("%s: Setting ARP monitoring interval to %d.\n", | |
274 | bond->dev->name, arp_interval); | |
275 | bond->params.arp_interval = arp_interval; | |
276 | if (arp_interval) { | |
277 | if (bond->params.miimon) { | |
278 | pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n", | |
279 | bond->dev->name, bond->dev->name); | |
280 | bond->params.miimon = 0; | |
281 | } | |
282 | if (!bond->params.arp_targets[0]) | |
283 | pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n", | |
284 | bond->dev->name); | |
285 | } | |
286 | if (bond->dev->flags & IFF_UP) { | |
287 | /* If the interface is up, we may need to fire off | |
288 | * the ARP timer. If the interface is down, the | |
289 | * timer will get fired off when the open function | |
290 | * is called. | |
291 | */ | |
292 | if (!arp_interval) { | |
293 | if (bond->params.arp_validate) | |
294 | bond->recv_probe = NULL; | |
295 | cancel_delayed_work_sync(&bond->arp_work); | |
296 | } else { | |
297 | /* arp_validate can be set only in active-backup mode */ | |
298 | if (bond->params.arp_validate) | |
299 | bond->recv_probe = bond_arp_rcv; | |
300 | cancel_delayed_work_sync(&bond->mii_work); | |
301 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
302 | } | |
303 | } | |
304 | ||
305 | return 0; | |
306 | } | |
7f28fa10 | 307 | |
308 | static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, | |
309 | __be32 target, | |
310 | unsigned long last_rx) | |
311 | { | |
312 | __be32 *targets = bond->params.arp_targets; | |
313 | struct list_head *iter; | |
314 | struct slave *slave; | |
315 | ||
316 | if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { | |
317 | bond_for_each_slave(bond, slave, iter) | |
318 | slave->target_last_arp_rx[slot] = last_rx; | |
319 | targets[slot] = target; | |
320 | } | |
321 | } | |
322 | ||
323 | static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) | |
324 | { | |
325 | __be32 *targets = bond->params.arp_targets; | |
326 | int ind; | |
327 | ||
328 | if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) { | |
329 | pr_err("%s: invalid ARP target %pI4 specified for addition\n", | |
330 | bond->dev->name, &target); | |
331 | return -EINVAL; | |
332 | } | |
333 | ||
334 | if (bond_get_targets_ip(targets, target) != -1) { /* dup */ | |
335 | pr_err("%s: ARP target %pI4 is already present\n", | |
336 | bond->dev->name, &target); | |
337 | return -EINVAL; | |
338 | } | |
339 | ||
340 | ind = bond_get_targets_ip(targets, 0); /* first free slot */ | |
341 | if (ind == -1) { | |
342 | pr_err("%s: ARP target table is full!\n", | |
343 | bond->dev->name); | |
344 | return -EINVAL; | |
345 | } | |
346 | ||
347 | pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target); | |
348 | ||
349 | _bond_options_arp_ip_target_set(bond, ind, target, jiffies); | |
350 | ||
351 | return 0; | |
352 | } | |
353 | ||
354 | int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) | |
355 | { | |
356 | int ret; | |
357 | ||
358 | /* not to race with bond_arp_rcv */ | |
359 | write_lock_bh(&bond->lock); | |
360 | ret = _bond_option_arp_ip_target_add(bond, target); | |
361 | write_unlock_bh(&bond->lock); | |
362 | ||
363 | return ret; | |
364 | } | |
365 | ||
366 | int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) | |
367 | { | |
368 | __be32 *targets = bond->params.arp_targets; | |
369 | struct list_head *iter; | |
370 | struct slave *slave; | |
371 | unsigned long *targets_rx; | |
372 | int ind, i; | |
373 | ||
374 | if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) { | |
375 | pr_err("%s: invalid ARP target %pI4 specified for removal\n", | |
376 | bond->dev->name, &target); | |
377 | return -EINVAL; | |
378 | } | |
379 | ||
380 | ind = bond_get_targets_ip(targets, target); | |
381 | if (ind == -1) { | |
382 | pr_err("%s: unable to remove nonexistent ARP target %pI4.\n", | |
383 | bond->dev->name, &target); | |
384 | return -EINVAL; | |
385 | } | |
386 | ||
387 | if (ind == 0 && !targets[1] && bond->params.arp_interval) | |
388 | pr_warn("%s: removing last arp target with arp_interval on\n", | |
389 | bond->dev->name); | |
390 | ||
391 | pr_info("%s: removing ARP target %pI4.\n", bond->dev->name, | |
392 | &target); | |
393 | ||
394 | /* not to race with bond_arp_rcv */ | |
395 | write_lock_bh(&bond->lock); | |
396 | ||
397 | bond_for_each_slave(bond, slave, iter) { | |
398 | targets_rx = slave->target_last_arp_rx; | |
399 | for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) | |
400 | targets_rx[i] = targets_rx[i+1]; | |
401 | targets_rx[i] = 0; | |
402 | } | |
403 | for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) | |
404 | targets[i] = targets[i+1]; | |
405 | targets[i] = 0; | |
406 | ||
407 | write_unlock_bh(&bond->lock); | |
408 | ||
409 | return 0; | |
410 | } | |
411 | ||
412 | int bond_option_arp_ip_targets_set(struct bonding *bond, __be32 *targets, | |
413 | int count) | |
414 | { | |
415 | int i, ret = 0; | |
416 | ||
417 | /* not to race with bond_arp_rcv */ | |
418 | write_lock_bh(&bond->lock); | |
419 | ||
420 | /* clear table */ | |
421 | for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) | |
422 | _bond_options_arp_ip_target_set(bond, i, 0, 0); | |
423 | ||
424 | if (count == 0 && bond->params.arp_interval) | |
425 | pr_warn("%s: removing last arp target with arp_interval on\n", | |
426 | bond->dev->name); | |
427 | ||
428 | for (i = 0; i < count; i++) { | |
429 | ret = _bond_option_arp_ip_target_add(bond, targets[i]); | |
430 | if (ret) | |
431 | break; | |
432 | } | |
433 | ||
434 | write_unlock_bh(&bond->lock); | |
435 | return ret; | |
436 | } | |
29c49482 | 437 | |
438 | int bond_option_arp_validate_set(struct bonding *bond, int arp_validate) | |
439 | { | |
440 | if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
441 | pr_err("%s: arp_validate only supported in active-backup mode.\n", | |
442 | bond->dev->name); | |
443 | return -EINVAL; | |
444 | } | |
445 | pr_info("%s: setting arp_validate to %s (%d).\n", | |
446 | bond->dev->name, arp_validate_tbl[arp_validate].modename, | |
447 | arp_validate); | |
448 | ||
449 | if (bond->dev->flags & IFF_UP) { | |
450 | if (!arp_validate) | |
451 | bond->recv_probe = NULL; | |
452 | else if (bond->params.arp_interval) | |
453 | bond->recv_probe = bond_arp_rcv; | |
454 | } | |
455 | bond->params.arp_validate = arp_validate; | |
456 | ||
457 | return 0; | |
458 | } | |
d5c84254 | 459 | |
460 | int bond_option_arp_all_targets_set(struct bonding *bond, int arp_all_targets) | |
461 | { | |
462 | pr_info("%s: setting arp_all_targets to %s (%d).\n", | |
463 | bond->dev->name, arp_all_targets_tbl[arp_all_targets].modename, | |
464 | arp_all_targets); | |
465 | ||
466 | bond->params.arp_all_targets = arp_all_targets; | |
467 | ||
468 | return 0; | |
469 | } | |
0a98a0d1 | 470 | |
471 | int bond_option_primary_set(struct bonding *bond, const char *primary) | |
472 | { | |
473 | struct list_head *iter; | |
474 | struct slave *slave; | |
475 | int err = 0; | |
476 | ||
477 | block_netpoll_tx(); | |
478 | read_lock(&bond->lock); | |
479 | write_lock_bh(&bond->curr_slave_lock); | |
480 | ||
481 | if (!USES_PRIMARY(bond->params.mode)) { | |
482 | pr_err("%s: Unable to set primary slave; %s is in mode %d\n", | |
483 | bond->dev->name, bond->dev->name, bond->params.mode); | |
484 | err = -EINVAL; | |
485 | goto out; | |
486 | } | |
487 | ||
488 | /* check to see if we are clearing primary */ | |
489 | if (!strlen(primary)) { | |
490 | pr_info("%s: Setting primary slave to None.\n", | |
491 | bond->dev->name); | |
492 | bond->primary_slave = NULL; | |
493 | memset(bond->params.primary, 0, sizeof(bond->params.primary)); | |
494 | bond_select_active_slave(bond); | |
495 | goto out; | |
496 | } | |
497 | ||
498 | bond_for_each_slave(bond, slave, iter) { | |
499 | if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { | |
500 | pr_info("%s: Setting %s as primary slave.\n", | |
501 | bond->dev->name, slave->dev->name); | |
502 | bond->primary_slave = slave; | |
503 | strcpy(bond->params.primary, slave->dev->name); | |
504 | bond_select_active_slave(bond); | |
505 | goto out; | |
506 | } | |
507 | } | |
508 | ||
509 | strncpy(bond->params.primary, primary, IFNAMSIZ); | |
510 | bond->params.primary[IFNAMSIZ - 1] = 0; | |
511 | ||
512 | pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n", | |
513 | bond->dev->name, primary, bond->dev->name); | |
514 | ||
515 | out: | |
516 | write_unlock_bh(&bond->curr_slave_lock); | |
517 | read_unlock(&bond->lock); | |
518 | unblock_netpoll_tx(); | |
519 | ||
520 | return err; | |
521 | } | |
8a41ae44 | 522 | |
523 | int bond_option_primary_reselect_set(struct bonding *bond, int primary_reselect) | |
524 | { | |
525 | bond->params.primary_reselect = primary_reselect; | |
526 | pr_info("%s: setting primary_reselect to %s (%d).\n", | |
527 | bond->dev->name, pri_reselect_tbl[primary_reselect].modename, | |
528 | primary_reselect); | |
529 | ||
530 | block_netpoll_tx(); | |
531 | write_lock_bh(&bond->curr_slave_lock); | |
532 | bond_select_active_slave(bond); | |
533 | write_unlock_bh(&bond->curr_slave_lock); | |
534 | unblock_netpoll_tx(); | |
535 | ||
536 | return 0; | |
537 | } |