Commit | Line | Data |
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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(); | |
110 | read_lock(&bond->lock); | |
111 | write_lock_bh(&bond->curr_slave_lock); | |
112 | ||
113 | /* check to see if we are clearing active */ | |
114 | if (!slave_dev) { | |
115 | pr_info("%s: Clearing current active slave.\n", | |
116 | bond->dev->name); | |
117 | rcu_assign_pointer(bond->curr_active_slave, NULL); | |
118 | bond_select_active_slave(bond); | |
119 | } else { | |
120 | struct slave *old_active = bond->curr_active_slave; | |
121 | struct slave *new_active = bond_slave_get_rtnl(slave_dev); | |
122 | ||
123 | BUG_ON(!new_active); | |
124 | ||
125 | if (new_active == old_active) { | |
126 | /* do nothing */ | |
127 | pr_info("%s: %s is already the current active slave.\n", | |
128 | bond->dev->name, new_active->dev->name); | |
129 | } else { | |
130 | if (old_active && (new_active->link == BOND_LINK_UP) && | |
131 | IS_UP(new_active->dev)) { | |
132 | pr_info("%s: Setting %s as active slave.\n", | |
133 | bond->dev->name, new_active->dev->name); | |
134 | bond_change_active_slave(bond, new_active); | |
135 | } else { | |
136 | pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n", | |
137 | bond->dev->name, new_active->dev->name, | |
138 | new_active->dev->name); | |
139 | ret = -EINVAL; | |
140 | } | |
141 | } | |
142 | } | |
143 | ||
144 | write_unlock_bh(&bond->curr_slave_lock); | |
145 | read_unlock(&bond->lock); | |
146 | unblock_netpoll_tx(); | |
147 | return ret; | |
148 | } | |
eecdaa6e | 149 | |
150 | int bond_option_miimon_set(struct bonding *bond, int miimon) | |
151 | { | |
152 | if (miimon < 0) { | |
153 | pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n", | |
154 | bond->dev->name, miimon, 0, INT_MAX); | |
155 | return -EINVAL; | |
156 | } | |
157 | pr_info("%s: Setting MII monitoring interval to %d.\n", | |
158 | bond->dev->name, miimon); | |
159 | bond->params.miimon = miimon; | |
160 | if (bond->params.updelay) | |
161 | pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n", | |
162 | bond->dev->name, | |
163 | bond->params.updelay * bond->params.miimon); | |
164 | if (bond->params.downdelay) | |
165 | pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n", | |
166 | bond->dev->name, | |
167 | bond->params.downdelay * bond->params.miimon); | |
168 | if (miimon && bond->params.arp_interval) { | |
169 | pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n", | |
170 | bond->dev->name); | |
171 | bond->params.arp_interval = 0; | |
172 | if (bond->params.arp_validate) | |
173 | bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; | |
174 | } | |
175 | if (bond->dev->flags & IFF_UP) { | |
176 | /* If the interface is up, we may need to fire off | |
177 | * the MII timer. If the interface is down, the | |
178 | * timer will get fired off when the open function | |
179 | * is called. | |
180 | */ | |
181 | if (!miimon) { | |
182 | cancel_delayed_work_sync(&bond->mii_work); | |
183 | } else { | |
184 | cancel_delayed_work_sync(&bond->arp_work); | |
185 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
186 | } | |
187 | } | |
188 | return 0; | |
189 | } | |
25852e29 | 190 | |
191 | int bond_option_updelay_set(struct bonding *bond, int updelay) | |
192 | { | |
193 | if (!(bond->params.miimon)) { | |
194 | pr_err("%s: Unable to set up delay as MII monitoring is disabled\n", | |
195 | bond->dev->name); | |
196 | return -EPERM; | |
197 | } | |
198 | ||
199 | if (updelay < 0) { | |
200 | pr_err("%s: Invalid up delay value %d not in range %d-%d; rejected.\n", | |
201 | bond->dev->name, updelay, 0, INT_MAX); | |
202 | return -EINVAL; | |
203 | } else { | |
204 | if ((updelay % bond->params.miimon) != 0) { | |
205 | pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", | |
206 | bond->dev->name, updelay, | |
207 | bond->params.miimon, | |
208 | (updelay / bond->params.miimon) * | |
209 | bond->params.miimon); | |
210 | } | |
211 | bond->params.updelay = updelay / bond->params.miimon; | |
212 | pr_info("%s: Setting up delay to %d.\n", | |
213 | bond->dev->name, | |
214 | bond->params.updelay * bond->params.miimon); | |
215 | } | |
216 | ||
217 | return 0; | |
218 | } | |
c7461f9b | 219 | |
220 | int bond_option_downdelay_set(struct bonding *bond, int downdelay) | |
221 | { | |
222 | if (!(bond->params.miimon)) { | |
223 | pr_err("%s: Unable to set down delay as MII monitoring is disabled\n", | |
224 | bond->dev->name); | |
225 | return -EPERM; | |
226 | } | |
227 | ||
228 | if (downdelay < 0) { | |
229 | pr_err("%s: Invalid down delay value %d not in range %d-%d; rejected.\n", | |
230 | bond->dev->name, downdelay, 0, INT_MAX); | |
231 | return -EINVAL; | |
232 | } else { | |
233 | if ((downdelay % bond->params.miimon) != 0) { | |
234 | pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n", | |
235 | bond->dev->name, downdelay, | |
236 | bond->params.miimon, | |
237 | (downdelay / bond->params.miimon) * | |
238 | bond->params.miimon); | |
239 | } | |
240 | bond->params.downdelay = downdelay / bond->params.miimon; | |
241 | pr_info("%s: Setting down delay to %d.\n", | |
242 | bond->dev->name, | |
243 | bond->params.downdelay * bond->params.miimon); | |
244 | } | |
245 | ||
246 | return 0; | |
247 | } | |
9f53e14e | 248 | |
249 | int bond_option_use_carrier_set(struct bonding *bond, int use_carrier) | |
250 | { | |
251 | if ((use_carrier == 0) || (use_carrier == 1)) { | |
252 | bond->params.use_carrier = use_carrier; | |
253 | pr_info("%s: Setting use_carrier to %d.\n", | |
254 | bond->dev->name, use_carrier); | |
255 | } else { | |
256 | pr_info("%s: Ignoring invalid use_carrier value %d.\n", | |
257 | bond->dev->name, use_carrier); | |
258 | } | |
259 | ||
260 | return 0; | |
261 | } | |
06151dbc | 262 | |
263 | int bond_option_arp_interval_set(struct bonding *bond, int arp_interval) | |
264 | { | |
265 | if (arp_interval < 0) { | |
266 | pr_err("%s: Invalid arp_interval value %d not in range 0-%d; rejected.\n", | |
267 | bond->dev->name, arp_interval, INT_MAX); | |
268 | return -EINVAL; | |
269 | } | |
270 | if (BOND_NO_USES_ARP(bond->params.mode)) { | |
271 | pr_info("%s: ARP monitoring cannot be used with ALB/TLB/802.3ad. Only MII monitoring is supported on %s.\n", | |
272 | bond->dev->name, bond->dev->name); | |
273 | return -EINVAL; | |
274 | } | |
275 | pr_info("%s: Setting ARP monitoring interval to %d.\n", | |
276 | bond->dev->name, arp_interval); | |
277 | bond->params.arp_interval = arp_interval; | |
278 | if (arp_interval) { | |
279 | if (bond->params.miimon) { | |
280 | pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n", | |
281 | bond->dev->name, bond->dev->name); | |
282 | bond->params.miimon = 0; | |
283 | } | |
284 | if (!bond->params.arp_targets[0]) | |
285 | pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n", | |
286 | bond->dev->name); | |
287 | } | |
288 | if (bond->dev->flags & IFF_UP) { | |
289 | /* If the interface is up, we may need to fire off | |
290 | * the ARP timer. If the interface is down, the | |
291 | * timer will get fired off when the open function | |
292 | * is called. | |
293 | */ | |
294 | if (!arp_interval) { | |
295 | if (bond->params.arp_validate) | |
296 | bond->recv_probe = NULL; | |
297 | cancel_delayed_work_sync(&bond->arp_work); | |
298 | } else { | |
299 | /* arp_validate can be set only in active-backup mode */ | |
300 | if (bond->params.arp_validate) | |
301 | bond->recv_probe = bond_arp_rcv; | |
302 | cancel_delayed_work_sync(&bond->mii_work); | |
303 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
304 | } | |
305 | } | |
306 | ||
307 | return 0; | |
308 | } | |
7f28fa10 | 309 | |
310 | static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, | |
311 | __be32 target, | |
312 | unsigned long last_rx) | |
313 | { | |
314 | __be32 *targets = bond->params.arp_targets; | |
315 | struct list_head *iter; | |
316 | struct slave *slave; | |
317 | ||
318 | if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { | |
319 | bond_for_each_slave(bond, slave, iter) | |
320 | slave->target_last_arp_rx[slot] = last_rx; | |
321 | targets[slot] = target; | |
322 | } | |
323 | } | |
324 | ||
325 | static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) | |
326 | { | |
327 | __be32 *targets = bond->params.arp_targets; | |
328 | int ind; | |
329 | ||
330 | if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) { | |
331 | pr_err("%s: invalid ARP target %pI4 specified for addition\n", | |
332 | bond->dev->name, &target); | |
333 | return -EINVAL; | |
334 | } | |
335 | ||
336 | if (bond_get_targets_ip(targets, target) != -1) { /* dup */ | |
337 | pr_err("%s: ARP target %pI4 is already present\n", | |
338 | bond->dev->name, &target); | |
339 | return -EINVAL; | |
340 | } | |
341 | ||
342 | ind = bond_get_targets_ip(targets, 0); /* first free slot */ | |
343 | if (ind == -1) { | |
344 | pr_err("%s: ARP target table is full!\n", | |
345 | bond->dev->name); | |
346 | return -EINVAL; | |
347 | } | |
348 | ||
349 | pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target); | |
350 | ||
351 | _bond_options_arp_ip_target_set(bond, ind, target, jiffies); | |
352 | ||
353 | return 0; | |
354 | } | |
355 | ||
356 | int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) | |
357 | { | |
358 | int ret; | |
359 | ||
360 | /* not to race with bond_arp_rcv */ | |
361 | write_lock_bh(&bond->lock); | |
362 | ret = _bond_option_arp_ip_target_add(bond, target); | |
363 | write_unlock_bh(&bond->lock); | |
364 | ||
365 | return ret; | |
366 | } | |
367 | ||
368 | int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) | |
369 | { | |
370 | __be32 *targets = bond->params.arp_targets; | |
371 | struct list_head *iter; | |
372 | struct slave *slave; | |
373 | unsigned long *targets_rx; | |
374 | int ind, i; | |
375 | ||
376 | if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) { | |
377 | pr_err("%s: invalid ARP target %pI4 specified for removal\n", | |
378 | bond->dev->name, &target); | |
379 | return -EINVAL; | |
380 | } | |
381 | ||
382 | ind = bond_get_targets_ip(targets, target); | |
383 | if (ind == -1) { | |
384 | pr_err("%s: unable to remove nonexistent ARP target %pI4.\n", | |
385 | bond->dev->name, &target); | |
386 | return -EINVAL; | |
387 | } | |
388 | ||
389 | if (ind == 0 && !targets[1] && bond->params.arp_interval) | |
390 | pr_warn("%s: removing last arp target with arp_interval on\n", | |
391 | bond->dev->name); | |
392 | ||
393 | pr_info("%s: removing ARP target %pI4.\n", bond->dev->name, | |
394 | &target); | |
395 | ||
396 | /* not to race with bond_arp_rcv */ | |
397 | write_lock_bh(&bond->lock); | |
398 | ||
399 | bond_for_each_slave(bond, slave, iter) { | |
400 | targets_rx = slave->target_last_arp_rx; | |
401 | for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) | |
402 | targets_rx[i] = targets_rx[i+1]; | |
403 | targets_rx[i] = 0; | |
404 | } | |
405 | for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) | |
406 | targets[i] = targets[i+1]; | |
407 | targets[i] = 0; | |
408 | ||
409 | write_unlock_bh(&bond->lock); | |
410 | ||
411 | return 0; | |
412 | } | |
413 | ||
414 | int bond_option_arp_ip_targets_set(struct bonding *bond, __be32 *targets, | |
415 | int count) | |
416 | { | |
417 | int i, ret = 0; | |
418 | ||
419 | /* not to race with bond_arp_rcv */ | |
420 | write_lock_bh(&bond->lock); | |
421 | ||
422 | /* clear table */ | |
423 | for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) | |
424 | _bond_options_arp_ip_target_set(bond, i, 0, 0); | |
425 | ||
426 | if (count == 0 && bond->params.arp_interval) | |
427 | pr_warn("%s: removing last arp target with arp_interval on\n", | |
428 | bond->dev->name); | |
429 | ||
430 | for (i = 0; i < count; i++) { | |
431 | ret = _bond_option_arp_ip_target_add(bond, targets[i]); | |
432 | if (ret) | |
433 | break; | |
434 | } | |
435 | ||
436 | write_unlock_bh(&bond->lock); | |
437 | return ret; | |
438 | } | |
29c49482 | 439 | |
440 | int bond_option_arp_validate_set(struct bonding *bond, int arp_validate) | |
441 | { | |
442 | if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
443 | pr_err("%s: arp_validate only supported in active-backup mode.\n", | |
444 | bond->dev->name); | |
445 | return -EINVAL; | |
446 | } | |
447 | pr_info("%s: setting arp_validate to %s (%d).\n", | |
448 | bond->dev->name, arp_validate_tbl[arp_validate].modename, | |
449 | arp_validate); | |
450 | ||
451 | if (bond->dev->flags & IFF_UP) { | |
452 | if (!arp_validate) | |
453 | bond->recv_probe = NULL; | |
454 | else if (bond->params.arp_interval) | |
455 | bond->recv_probe = bond_arp_rcv; | |
456 | } | |
457 | bond->params.arp_validate = arp_validate; | |
458 | ||
459 | return 0; | |
460 | } |