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bonding: convert ad_select to use the new option API
[mirror_ubuntu-artful-kernel.git] / drivers / net / bonding / bond_options.c
CommitLineData
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>
09117362 19#include <linux/ctype.h>
4fb0ef58 20#include <linux/inet.h>
72be35fe
JP		 21#include "bonding.h"
22
2b3798d5
NA		 23static struct bond_opt_value bond_mode_tbl[] = {
24 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
25 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
26 { "balance-xor", BOND_MODE_XOR, 0},
27 { "broadcast", BOND_MODE_BROADCAST, 0},
28 { "802.3ad", BOND_MODE_8023AD, 0},
29 { "balance-tlb", BOND_MODE_TLB, 0},
30 { "balance-alb", BOND_MODE_ALB, 0},
31 { NULL, -1, 0},
32};
33
aa59d851
NA		 34static struct bond_opt_value bond_pps_tbl[] = {
35 { "default", 1, BOND_VALFLAG_DEFAULT},
36 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
37 { NULL, -1, 0},
38};
39
a4b32ce7
NA		 40static struct bond_opt_value bond_xmit_hashtype_tbl[] = {
41 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
42 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
43 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
44 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
45 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
46 { NULL, -1, 0},
47};
48
16228881
NA		 49static struct bond_opt_value bond_arp_validate_tbl[] = {
50 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
51 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
52 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
53 { "all", BOND_ARP_VALIDATE_ALL, 0},
54 { NULL, -1, 0},
55};
56
edf36b24
NA		 57static struct bond_opt_value bond_arp_all_targets_tbl[] = {
58 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
59 { "all", BOND_ARP_TARGETS_ALL, 0},
60 { NULL, -1, 0},
61};
62
1df6b6aa
NA		 63static struct bond_opt_value bond_fail_over_mac_tbl[] = {
64 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
65 { "active", BOND_FOM_ACTIVE, 0},
66 { "follow", BOND_FOM_FOLLOW, 0},
67 { NULL, -1, 0},
68};
69
7bdb04ed
NA		 70static struct bond_opt_value bond_intmax_tbl[] = {
71 { "off", 0, BOND_VALFLAG_DEFAULT},
72 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
73};
74
d3131de7
NA		 75static struct bond_opt_value bond_lacp_rate_tbl[] = {
76 { "slow", AD_LACP_SLOW, 0},
77 { "fast", AD_LACP_FAST, 0},
78 { NULL, -1, 0},
79};
80
9e5f5eeb
NA		 81static struct bond_opt_value bond_ad_select_tbl[] = {
82 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
83 { "bandwidth", BOND_AD_BANDWIDTH, 0},
84 { "count", BOND_AD_COUNT, 0},
85 { NULL, -1, 0},
86};
87
09117362 88static struct bond_option bond_opts[] = {
2b3798d5
NA		 89 [BOND_OPT_MODE] = {
90 .id = BOND_OPT_MODE,
91 .name = "mode",
92 .desc = "bond device mode",
93 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
94 .values = bond_mode_tbl,
95 .set = bond_option_mode_set
96 },
aa59d851
NA		 97 [BOND_OPT_PACKETS_PER_SLAVE] = {
98 .id = BOND_OPT_PACKETS_PER_SLAVE,
99 .name = "packets_per_slave",
100 .desc = "Packets to send per slave in RR mode",
101 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
102 .values = bond_pps_tbl,
103 .set = bond_option_pps_set
104 },
a4b32ce7
NA		 105 [BOND_OPT_XMIT_HASH] = {
106 .id = BOND_OPT_XMIT_HASH,
107 .name = "xmit_hash_policy",
108 .desc = "balance-xor and 802.3ad hashing method",
109 .values = bond_xmit_hashtype_tbl,
110 .set = bond_option_xmit_hash_policy_set
111 },
16228881
NA		 112 [BOND_OPT_ARP_VALIDATE] = {
113 .id = BOND_OPT_ARP_VALIDATE,
114 .name = "arp_validate",
115 .desc = "validate src/dst of ARP probes",
116 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP)),
117 .values = bond_arp_validate_tbl,
118 .set = bond_option_arp_validate_set
119 },
edf36b24
NA		 120 [BOND_OPT_ARP_ALL_TARGETS] = {
121 .id = BOND_OPT_ARP_ALL_TARGETS,
122 .name = "arp_all_targets",
123 .desc = "fail on any/all arp targets timeout",
124 .values = bond_arp_all_targets_tbl,
125 .set = bond_option_arp_all_targets_set
126 },
1df6b6aa
NA		 127 [BOND_OPT_FAIL_OVER_MAC] = {
128 .id = BOND_OPT_FAIL_OVER_MAC,
129 .name = "fail_over_mac",
130 .desc = "For active-backup, do not set all slaves to the same MAC",
131 .flags = BOND_OPTFLAG_NOSLAVES,
132 .values = bond_fail_over_mac_tbl,
133 .set = bond_option_fail_over_mac_set
134 },
7bdb04ed
NA		 135 [BOND_OPT_ARP_INTERVAL] = {
136 .id = BOND_OPT_ARP_INTERVAL,
137 .name = "arp_interval",
138 .desc = "arp interval in milliseconds",
139 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
140 BIT(BOND_MODE_ALB),
141 .values = bond_intmax_tbl,
142 .set = bond_option_arp_interval_set
143 },
4fb0ef58
NA		 144 [BOND_OPT_ARP_TARGETS] = {
145 .id = BOND_OPT_ARP_TARGETS,
146 .name = "arp_ip_target",
147 .desc = "arp targets in n.n.n.n form",
148 .flags = BOND_OPTFLAG_RAWVAL,
149 .set = bond_option_arp_ip_targets_set
150 },
25a9b54a
NA		 151 [BOND_OPT_DOWNDELAY] = {
152 .id = BOND_OPT_DOWNDELAY,
153 .name = "downdelay",
154 .desc = "Delay before considering link down, in milliseconds",
155 .values = bond_intmax_tbl,
156 .set = bond_option_downdelay_set
157 },
e4994612
NA		 158 [BOND_OPT_UPDELAY] = {
159 .id = BOND_OPT_UPDELAY,
160 .name = "updelay",
161 .desc = "Delay before considering link up, in milliseconds",
162 .values = bond_intmax_tbl,
163 .set = bond_option_updelay_set
164 },
d3131de7
NA		 165 [BOND_OPT_LACP_RATE] = {
166 .id = BOND_OPT_LACP_RATE,
167 .name = "lacp_rate",
168 .desc = "LACPDU tx rate to request from 802.3ad partner",
169 .flags = BOND_OPTFLAG_IFDOWN,
170 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
171 .values = bond_lacp_rate_tbl,
172 .set = bond_option_lacp_rate_set
173 },
633ddc9e
NA		 174 [BOND_OPT_MINLINKS] = {
175 .id = BOND_OPT_MINLINKS,
176 .name = "min_links",
177 .desc = "Minimum number of available links before turning on carrier",
178 .values = bond_intmax_tbl,
179 .set = bond_option_min_links_set
180 },
9e5f5eeb
NA		 181 [BOND_OPT_AD_SELECT] = {
182 .id = BOND_OPT_AD_SELECT,
183 .name = "ad_select",
184 .desc = "803.ad aggregation selection logic",
185 .flags = BOND_OPTFLAG_IFDOWN,
186 .values = bond_ad_select_tbl,
187 .set = bond_option_ad_select_set
188 },
09117362
NA		 189 { }
190};
191
192/* Searches for a value in opt's values[] table */
193struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
194{
195 struct bond_option *opt;
196 int i;
197
198 opt = bond_opt_get(option);
199 if (WARN_ON(!opt))
200 return NULL;
201 for (i = 0; opt->values && opt->values[i].string; i++)
202 if (opt->values[i].value == val)
203 return &opt->values[i];
204
205 return NULL;
206}
207
208/* Searches for a value in opt's values[] table which matches the flagmask */
209static struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
210 u32 flagmask)
211{
212 int i;
213
214 for (i = 0; opt->values && opt->values[i].string; i++)
215 if (opt->values[i].flags & flagmask)
216 return &opt->values[i];
217
218 return NULL;
219}
220
221/* If maxval is missing then there's no range to check. In case minval is
222 * missing then it's considered to be 0.
223 */
224static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
225{
226 struct bond_opt_value *minval, *maxval;
227
228 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
229 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
230 if (!maxval || (minval && val < minval->value) || val > maxval->value)
231 return false;
232
233 return true;
234}
235
236/**
237 * bond_opt_parse - parse option value
238 * @opt: the option to parse against
239 * @val: value to parse
240 *
241 * This function tries to extract the value from @val and check if it's
242 * a possible match for the option and returns NULL if a match isn't found,
243 * or the struct_opt_value that matched. It also strips the new line from
244 * @val->string if it's present.
245 */
246struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
247 struct bond_opt_value *val)
248{
249 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
250 struct bond_opt_value *tbl, *ret = NULL;
251 bool checkval;
252 int i, rv;
253
254 /* No parsing if the option wants a raw val */
255 if (opt->flags & BOND_OPTFLAG_RAWVAL)
256 return val;
257
258 tbl = opt->values;
259 if (!tbl)
260 goto out;
261
262 /* ULLONG_MAX is used to bypass string processing */
263 checkval = val->value != ULLONG_MAX;
264 if (!checkval) {
265 if (!val->string)
266 goto out;
267 p = strchr(val->string, '\n');
268 if (p)
269 *p = '\0';
270 for (p = val->string; *p; p++)
271 if (!(isdigit(*p) || isspace(*p)))
272 break;
273 /* The following code extracts the string to match or the value
274 * and sets checkval appropriately
275 */
276 if (*p) {
277 rv = sscanf(val->string, "%32s", valstr);
278 } else {
279 rv = sscanf(val->string, "%llu", &val->value);
280 checkval = true;
281 }
282 if (!rv)
283 goto out;
284 }
285
286 for (i = 0; tbl[i].string; i++) {
287 /* Check for exact match */
288 if (checkval) {
289 if (val->value == tbl[i].value)
290 ret = &tbl[i];
291 } else {
292 if (!strcmp(valstr, "default") &&
293 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
294 ret = &tbl[i];
295
296 if (!strcmp(valstr, tbl[i].string))
297 ret = &tbl[i];
298 }
299 /* Found an exact match */
300 if (ret)
301 goto out;
302 }
303 /* Possible range match */
304 if (checkval && bond_opt_check_range(opt, val->value))
305 ret = val;
306out:
307 return ret;
308}
309
310/* Check opt's dependencies against bond mode and currently set options */
311static int bond_opt_check_deps(struct bonding *bond,
312 const struct bond_option *opt)
313{
314 struct bond_params *params = &bond->params;
315
316 if (test_bit(params->mode, &opt->unsuppmodes))
317 return -EACCES;
318 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
319 return -ENOTEMPTY;
320 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
321 return -EBUSY;
322
323 return 0;
324}
325
326static void bond_opt_dep_print(struct bonding *bond,
327 const struct bond_option *opt)
328{
2b3798d5 329 struct bond_opt_value *modeval;
09117362
NA		 330 struct bond_params *params;
331
332 params = &bond->params;
2b3798d5 333 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
09117362 334 if (test_bit(params->mode, &opt->unsuppmodes))
2b3798d5
NA		 335 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
336 bond->dev->name, opt->name,
337 modeval->string, modeval->value);
09117362
NA		 338}
339
340static void bond_opt_error_interpret(struct bonding *bond,
341 const struct bond_option *opt,
342 int error, struct bond_opt_value *val)
343{
344 struct bond_opt_value *minval, *maxval;
345 char *p;
346
347 switch (error) {
348 case -EINVAL:
349 if (val) {
350 if (val->string) {
351 /* sometimes RAWVAL opts may have new lines */
352 p = strchr(val->string, '\n');
353 if (p)
354 *p = '\0';
355 pr_err("%s: option %s: invalid value (%s).\n",
356 bond->dev->name, opt->name, val->string);
357 } else {
358 pr_err("%s: option %s: invalid value (%llu).\n",
359 bond->dev->name, opt->name, val->value);
360 }
361 }
362 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
363 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
364 if (!maxval)
365 break;
366 pr_err("%s: option %s: allowed values %llu - %llu.\n",
367 bond->dev->name, opt->name, minval ? minval->value : 0,
368 maxval->value);
369 break;
370 case -EACCES:
371 bond_opt_dep_print(bond, opt);
372 break;
373 case -ENOTEMPTY:
374 pr_err("%s: option %s: unable to set because the bond device has slaves.\n",
375 bond->dev->name, opt->name);
376 break;
377 case -EBUSY:
378 pr_err("%s: option %s: unable to set because the bond device is up.\n",
379 bond->dev->name, opt->name);
380 break;
381 default:
382 break;
383 }
384}
385
386/**
387 * __bond_opt_set - set a bonding option
388 * @bond: target bond device
389 * @option: option to set
390 * @val: value to set it to
391 *
392 * This function is used to change the bond's option value, it can be
393 * used for both enabling/changing an option and for disabling it. RTNL lock
394 * must be obtained before calling this function.
395 */
396int __bond_opt_set(struct bonding *bond,
397 unsigned int option, struct bond_opt_value *val)
398{
399 struct bond_opt_value *retval = NULL;
400 const struct bond_option *opt;
401 int ret = -ENOENT;
402
403 ASSERT_RTNL();
404
405 opt = bond_opt_get(option);
406 if (WARN_ON(!val) || WARN_ON(!opt))
407 goto out;
408 ret = bond_opt_check_deps(bond, opt);
409 if (ret)
410 goto out;
411 retval = bond_opt_parse(opt, val);
412 if (!retval) {
413 ret = -EINVAL;
414 goto out;
415 }
416 ret = opt->set(bond, retval);
417out:
418 if (ret)
419 bond_opt_error_interpret(bond, opt, ret, val);
420
421 return ret;
422}
423
424/**
425 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
426 * @bond: target bond device
427 * @option: option to set
428 * @buf: value to set it to
429 *
430 * This function tries to acquire RTNL without blocking and if successful
431 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
432 */
433int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
434{
435 struct bond_opt_value optval;
436 int ret;
437
438 if (!rtnl_trylock())
439 return restart_syscall();
440 bond_opt_initstr(&optval, buf);
441 ret = __bond_opt_set(bond, option, &optval);
442 rtnl_unlock();
443
444 return ret;
445}
446
447/**
448 * bond_opt_get - get a pointer to an option
449 * @option: option for which to return a pointer
450 *
451 * This function checks if option is valid and if so returns a pointer
452 * to its entry in the bond_opts[] option array.
453 */
454struct bond_option *bond_opt_get(unsigned int option)
455{
456 if (!BOND_OPT_VALID(option))
457 return NULL;
458
459 return &bond_opts[option];
460}
461
2b3798d5 462int bond_option_mode_set(struct bonding *bond, struct bond_opt_value *newval)
72be35fe 463{
2b3798d5 464 if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
fe9d04af 465 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
2b3798d5 466 bond->dev->name, newval->string);
fe9d04af 467 /* disable arp monitoring */
468 bond->params.arp_interval = 0;
469 /* set miimon to default value */
470 bond->params.miimon = BOND_DEFAULT_MIIMON;
471 pr_info("%s: Setting MII monitoring interval to %d.\n",
472 bond->dev->name, bond->params.miimon);
72be35fe
JP		 473 }
474
475 /* don't cache arp_validate between modes */
476 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
2b3798d5
NA		 477 bond->params.mode = newval->value;
478
72be35fe
JP		 479 return 0;
480}
d9e32b21 481
752d48b5
JP		 482static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
483 struct slave *slave)
484{
485 return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
486}
487
488struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
489{
490 struct slave *slave = rcu_dereference(bond->curr_active_slave);
491
492 return __bond_option_active_slave_get(bond, slave);
493}
494
495struct net_device *bond_option_active_slave_get(struct bonding *bond)
496{
497 return __bond_option_active_slave_get(bond, bond->curr_active_slave);
498}
499
d9e32b21
JP		 500int bond_option_active_slave_set(struct bonding *bond,
501 struct net_device *slave_dev)
502{
503 int ret = 0;
504
505 if (slave_dev) {
506 if (!netif_is_bond_slave(slave_dev)) {
507 pr_err("Device %s is not bonding slave.\n",
508 slave_dev->name);
509 return -EINVAL;
510 }
511
512 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
513 pr_err("%s: Device %s is not our slave.\n",
514 bond->dev->name, slave_dev->name);
515 return -EINVAL;
516 }
517 }
518
519 if (!USES_PRIMARY(bond->params.mode)) {
520 pr_err("%s: Unable to change active slave; %s is in mode %d\n",
521 bond->dev->name, bond->dev->name, bond->params.mode);
522 return -EINVAL;
523 }
524
525 block_netpoll_tx();
d9e32b21
JP		 526 write_lock_bh(&bond->curr_slave_lock);
527
528 /* check to see if we are clearing active */
529 if (!slave_dev) {
530 pr_info("%s: Clearing current active slave.\n",
531 bond->dev->name);
532 rcu_assign_pointer(bond->curr_active_slave, NULL);
533 bond_select_active_slave(bond);
534 } else {
535 struct slave *old_active = bond->curr_active_slave;
536 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
537
538 BUG_ON(!new_active);
539
540 if (new_active == old_active) {
541 /* do nothing */
542 pr_info("%s: %s is already the current active slave.\n",
543 bond->dev->name, new_active->dev->name);
544 } else {
545 if (old_active && (new_active->link == BOND_LINK_UP) &&
546 IS_UP(new_active->dev)) {
547 pr_info("%s: Setting %s as active slave.\n",
548 bond->dev->name, new_active->dev->name);
549 bond_change_active_slave(bond, new_active);
550 } else {
551 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
552 bond->dev->name, new_active->dev->name,
553 new_active->dev->name);
554 ret = -EINVAL;
555 }
556 }
557 }
558
559 write_unlock_bh(&bond->curr_slave_lock);
d9e32b21
JP		 560 unblock_netpoll_tx();
561 return ret;
562}
eecdaa6e 563
564int bond_option_miimon_set(struct bonding *bond, int miimon)
565{
566 if (miimon < 0) {
567 pr_err("%s: Invalid miimon value %d not in range %d-%d; rejected.\n",
568 bond->dev->name, miimon, 0, INT_MAX);
569 return -EINVAL;
570 }
571 pr_info("%s: Setting MII monitoring interval to %d.\n",
572 bond->dev->name, miimon);
573 bond->params.miimon = miimon;
574 if (bond->params.updelay)
575 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
576 bond->dev->name,
577 bond->params.updelay * bond->params.miimon);
578 if (bond->params.downdelay)
579 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
580 bond->dev->name,
581 bond->params.downdelay * bond->params.miimon);
582 if (miimon && bond->params.arp_interval) {
583 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
584 bond->dev->name);
585 bond->params.arp_interval = 0;
586 if (bond->params.arp_validate)
587 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
588 }
589 if (bond->dev->flags & IFF_UP) {
590 /* If the interface is up, we may need to fire off
591 * the MII timer. If the interface is down, the
592 * timer will get fired off when the open function
593 * is called.
594 */
595 if (!miimon) {
596 cancel_delayed_work_sync(&bond->mii_work);
597 } else {
598 cancel_delayed_work_sync(&bond->arp_work);
599 queue_delayed_work(bond->wq, &bond->mii_work, 0);
600 }
601 }
602 return 0;
603}
25852e29 604
e4994612 605int bond_option_updelay_set(struct bonding *bond, struct bond_opt_value *newval)
25852e29 606{
e4994612 607 if (!bond->params.miimon) {
25852e29 608 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
609 bond->dev->name);
610 return -EPERM;
611 }
e4994612
NA		 612 if ((newval->value % bond->params.miimon) != 0) {
613 pr_warn("%s: Warning: up delay (%llu) is not a multiple of miimon (%d), updelay rounded to %llu ms\n",
614 bond->dev->name, newval->value,
615 bond->params.miimon,
616 (newval->value / bond->params.miimon) *
617 bond->params.miimon);
25852e29 618 }
e4994612
NA		 619 bond->params.updelay = newval->value / bond->params.miimon;
620 pr_info("%s: Setting up delay to %d.\n",
621 bond->dev->name,
622 bond->params.updelay * bond->params.miimon);
25852e29 623
624 return 0;
625}
c7461f9b 626
25a9b54a
NA		 627int bond_option_downdelay_set(struct bonding *bond,
628 struct bond_opt_value *newval)
c7461f9b 629{
25a9b54a 630 if (!bond->params.miimon) {
c7461f9b 631 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
632 bond->dev->name);
633 return -EPERM;
634 }
25a9b54a
NA		 635 if ((newval->value % bond->params.miimon) != 0) {
636 pr_warn("%s: Warning: down delay (%llu) is not a multiple of miimon (%d), delay rounded to %llu ms\n",
637 bond->dev->name, newval->value,
638 bond->params.miimon,
639 (newval->value / bond->params.miimon) *
640 bond->params.miimon);
c7461f9b 641 }
25a9b54a
NA		 642 bond->params.downdelay = newval->value / bond->params.miimon;
643 pr_info("%s: Setting down delay to %d.\n",
644 bond->dev->name,
645 bond->params.downdelay * bond->params.miimon);
c7461f9b 646
647 return 0;
648}
9f53e14e 649
650int bond_option_use_carrier_set(struct bonding *bond, int use_carrier)
651{
652 if ((use_carrier == 0) || (use_carrier == 1)) {
653 bond->params.use_carrier = use_carrier;
654 pr_info("%s: Setting use_carrier to %d.\n",
655 bond->dev->name, use_carrier);
656 } else {
657 pr_info("%s: Ignoring invalid use_carrier value %d.\n",
658 bond->dev->name, use_carrier);
659 }
660
661 return 0;
662}
06151dbc 663
7bdb04ed
NA		 664int bond_option_arp_interval_set(struct bonding *bond,
665 struct bond_opt_value *newval)
06151dbc 666{
7bdb04ed
NA		 667 pr_info("%s: Setting ARP monitoring interval to %llu.\n",
668 bond->dev->name, newval->value);
669 bond->params.arp_interval = newval->value;
670 if (newval->value) {
06151dbc 671 if (bond->params.miimon) {
672 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
673 bond->dev->name, bond->dev->name);
674 bond->params.miimon = 0;
675 }
676 if (!bond->params.arp_targets[0])
677 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
678 bond->dev->name);
679 }
680 if (bond->dev->flags & IFF_UP) {
681 /* If the interface is up, we may need to fire off
682 * the ARP timer. If the interface is down, the
683 * timer will get fired off when the open function
684 * is called.
685 */
7bdb04ed 686 if (!newval->value) {
06151dbc 687 if (bond->params.arp_validate)
688 bond->recv_probe = NULL;
689 cancel_delayed_work_sync(&bond->arp_work);
690 } else {
691 /* arp_validate can be set only in active-backup mode */
692 if (bond->params.arp_validate)
693 bond->recv_probe = bond_arp_rcv;
694 cancel_delayed_work_sync(&bond->mii_work);
695 queue_delayed_work(bond->wq, &bond->arp_work, 0);
696 }
697 }
698
699 return 0;
700}
7f28fa10 701
702static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
703 __be32 target,
704 unsigned long last_rx)
705{
706 __be32 *targets = bond->params.arp_targets;
707 struct list_head *iter;
708 struct slave *slave;
709
710 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
711 bond_for_each_slave(bond, slave, iter)
712 slave->target_last_arp_rx[slot] = last_rx;
713 targets[slot] = target;
714 }
715}
716
717static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
718{
719 __be32 *targets = bond->params.arp_targets;
720 int ind;
721
722 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
723 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
724 bond->dev->name, &target);
725 return -EINVAL;
726 }
727
728 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
729 pr_err("%s: ARP target %pI4 is already present\n",
730 bond->dev->name, &target);
731 return -EINVAL;
732 }
733
734 ind = bond_get_targets_ip(targets, 0); /* first free slot */
735 if (ind == -1) {
736 pr_err("%s: ARP target table is full!\n",
737 bond->dev->name);
738 return -EINVAL;
739 }
740
741 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target);
742
743 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
744
745 return 0;
746}
747
748int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
749{
750 int ret;
751
752 /* not to race with bond_arp_rcv */
753 write_lock_bh(&bond->lock);
754 ret = _bond_option_arp_ip_target_add(bond, target);
755 write_unlock_bh(&bond->lock);
756
757 return ret;
758}
759
760int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
761{
762 __be32 *targets = bond->params.arp_targets;
763 struct list_head *iter;
764 struct slave *slave;
765 unsigned long *targets_rx;
766 int ind, i;
767
768 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
769 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
770 bond->dev->name, &target);
771 return -EINVAL;
772 }
773
774 ind = bond_get_targets_ip(targets, target);
775 if (ind == -1) {
776 pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
777 bond->dev->name, &target);
778 return -EINVAL;
779 }
780
781 if (ind == 0 && !targets[1] && bond->params.arp_interval)
782 pr_warn("%s: removing last arp target with arp_interval on\n",
783 bond->dev->name);
784
785 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
786 &target);
787
788 /* not to race with bond_arp_rcv */
789 write_lock_bh(&bond->lock);
790
791 bond_for_each_slave(bond, slave, iter) {
792 targets_rx = slave->target_last_arp_rx;
793 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
794 targets_rx[i] = targets_rx[i+1];
795 targets_rx[i] = 0;
796 }
797 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
798 targets[i] = targets[i+1];
799 targets[i] = 0;
800
801 write_unlock_bh(&bond->lock);
802
803 return 0;
804}
805
4fb0ef58 806void bond_option_arp_ip_targets_clear(struct bonding *bond)
7f28fa10 807{
4fb0ef58 808 int i;
7f28fa10 809
810 /* not to race with bond_arp_rcv */
811 write_lock_bh(&bond->lock);
7f28fa10 812 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
813 _bond_options_arp_ip_target_set(bond, i, 0, 0);
4fb0ef58
NA		 814 write_unlock_bh(&bond->lock);
815}
7f28fa10 816
4fb0ef58
NA		 817int bond_option_arp_ip_targets_set(struct bonding *bond,
818 struct bond_opt_value *newval)
819{
820 int ret = -EPERM;
821 __be32 target;
822
823 if (newval->string) {
824 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
825 pr_err("%s: invalid ARP target %pI4 specified\n",
826 bond->dev->name, &target);
827 return ret;
828 }
829 if (newval->string[0] == '+')
830 ret = bond_option_arp_ip_target_add(bond, target);
831 else if (newval->string[0] == '-')
832 ret = bond_option_arp_ip_target_rem(bond, target);
833 else
834 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
835 bond->dev->name);
836 } else {
837 target = newval->value;
838 ret = bond_option_arp_ip_target_add(bond, target);
7f28fa10 839 }
840
7f28fa10 841 return ret;
842}
29c49482 843
16228881
NA		 844int bond_option_arp_validate_set(struct bonding *bond,
845 struct bond_opt_value *newval)
29c49482 846{
16228881
NA		 847 pr_info("%s: setting arp_validate to %s (%llu).\n",
848 bond->dev->name, newval->string, newval->value);
29c49482 849
850 if (bond->dev->flags & IFF_UP) {
16228881 851 if (!newval->value)
29c49482 852 bond->recv_probe = NULL;
853 else if (bond->params.arp_interval)
854 bond->recv_probe = bond_arp_rcv;
855 }
16228881 856 bond->params.arp_validate = newval->value;
29c49482 857
858 return 0;
859}
d5c84254 860
edf36b24
NA		 861int bond_option_arp_all_targets_set(struct bonding *bond,
862 struct bond_opt_value *newval)
d5c84254 863{
edf36b24
NA		 864 pr_info("%s: setting arp_all_targets to %s (%llu).\n",
865 bond->dev->name, newval->string, newval->value);
866 bond->params.arp_all_targets = newval->value;
d5c84254 867
868 return 0;
869}
0a98a0d1 870
871int bond_option_primary_set(struct bonding *bond, const char *primary)
872{
873 struct list_head *iter;
874 struct slave *slave;
875 int err = 0;
876
877 block_netpoll_tx();
878 read_lock(&bond->lock);
879 write_lock_bh(&bond->curr_slave_lock);
880
881 if (!USES_PRIMARY(bond->params.mode)) {
882 pr_err("%s: Unable to set primary slave; %s is in mode %d\n",
883 bond->dev->name, bond->dev->name, bond->params.mode);
884 err = -EINVAL;
885 goto out;
886 }
887
888 /* check to see if we are clearing primary */
889 if (!strlen(primary)) {
890 pr_info("%s: Setting primary slave to None.\n",
891 bond->dev->name);
892 bond->primary_slave = NULL;
893 memset(bond->params.primary, 0, sizeof(bond->params.primary));
894 bond_select_active_slave(bond);
895 goto out;
896 }
897
898 bond_for_each_slave(bond, slave, iter) {
899 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
900 pr_info("%s: Setting %s as primary slave.\n",
901 bond->dev->name, slave->dev->name);
902 bond->primary_slave = slave;
903 strcpy(bond->params.primary, slave->dev->name);
904 bond_select_active_slave(bond);
905 goto out;
906 }
907 }
908
909 strncpy(bond->params.primary, primary, IFNAMSIZ);
910 bond->params.primary[IFNAMSIZ - 1] = 0;
911
912 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n",
913 bond->dev->name, primary, bond->dev->name);
914
915out:
916 write_unlock_bh(&bond->curr_slave_lock);
917 read_unlock(&bond->lock);
918 unblock_netpoll_tx();
919
920 return err;
921}
8a41ae44 922
923int bond_option_primary_reselect_set(struct bonding *bond, int primary_reselect)
924{
3243c47b 925 if (bond_parm_tbl_lookup(primary_reselect, pri_reselect_tbl) < 0) {
926 pr_err("%s: Ignoring invalid primary_reselect value %d.\n",
927 bond->dev->name, primary_reselect);
928 return -EINVAL;
929 }
930
8a41ae44 931 bond->params.primary_reselect = primary_reselect;
932 pr_info("%s: setting primary_reselect to %s (%d).\n",
933 bond->dev->name, pri_reselect_tbl[primary_reselect].modename,
934 primary_reselect);
935
936 block_netpoll_tx();
937 write_lock_bh(&bond->curr_slave_lock);
938 bond_select_active_slave(bond);
939 write_unlock_bh(&bond->curr_slave_lock);
940 unblock_netpoll_tx();
941
942 return 0;
943}
89901972 944
1df6b6aa
NA		 945int bond_option_fail_over_mac_set(struct bonding *bond,
946 struct bond_opt_value *newval)
89901972 947{
1df6b6aa
NA		 948 pr_info("%s: Setting fail_over_mac to %s (%llu).\n",
949 bond->dev->name, newval->string, newval->value);
950 bond->params.fail_over_mac = newval->value;
89901972 951
952 return 0;
953}
f70161c6 954
a4b32ce7
NA		 955int bond_option_xmit_hash_policy_set(struct bonding *bond,
956 struct bond_opt_value *newval)
f70161c6 957{
a4b32ce7
NA		 958 pr_info("%s: setting xmit hash policy to %s (%llu).\n",
959 bond->dev->name, newval->string, newval->value);
960 bond->params.xmit_policy = newval->value;
f70161c6 961
962 return 0;
963}
d8838de7 964
965int bond_option_resend_igmp_set(struct bonding *bond, int resend_igmp)
966{
967 if (resend_igmp < 0 || resend_igmp > 255) {
968 pr_err("%s: Invalid resend_igmp value %d not in range 0-255; rejected.\n",
969 bond->dev->name, resend_igmp);
970 return -EINVAL;
971 }
972
973 bond->params.resend_igmp = resend_igmp;
974 pr_info("%s: Setting resend_igmp to %d.\n",
975 bond->dev->name, resend_igmp);
976
977 return 0;
978}
2c9839c1 979
980int bond_option_num_peer_notif_set(struct bonding *bond, int num_peer_notif)
981{
982 bond->params.num_peer_notif = num_peer_notif;
983 return 0;
984}
1cc0b1e3 985
986int bond_option_all_slaves_active_set(struct bonding *bond,
987 int all_slaves_active)
988{
989 struct list_head *iter;
990 struct slave *slave;
991
992 if (all_slaves_active == bond->params.all_slaves_active)
993 return 0;
994
995 if ((all_slaves_active == 0) || (all_slaves_active == 1)) {
996 bond->params.all_slaves_active = all_slaves_active;
997 } else {
998 pr_info("%s: Ignoring invalid all_slaves_active value %d.\n",
999 bond->dev->name, all_slaves_active);
1000 return -EINVAL;
1001 }
1002
1003 bond_for_each_slave(bond, slave, iter) {
1004 if (!bond_is_active_slave(slave)) {
1005 if (all_slaves_active)
1006 slave->inactive = 0;
1007 else
1008 slave->inactive = 1;
1009 }
1010 }
1011
1012 return 0;
1013}
7d101008 1014
633ddc9e
NA		 1015int bond_option_min_links_set(struct bonding *bond,
1016 struct bond_opt_value *newval)
7d101008 1017{
633ddc9e
NA		 1018 pr_info("%s: Setting min links value to %llu\n",
1019 bond->dev->name, newval->value);
1020 bond->params.min_links = newval->value;
7d101008 1021
1022 return 0;
1023}
8d836d09 1024
1025int bond_option_lp_interval_set(struct bonding *bond, int lp_interval)
1026{
1027 if (lp_interval <= 0) {
1028 pr_err("%s: lp_interval must be between 1 and %d\n",
1029 bond->dev->name, INT_MAX);
1030 return -EINVAL;
1031 }
1032
1033 bond->params.lp_interval = lp_interval;
1034
1035 return 0;
1036}
c13ab3ff 1037
aa59d851 1038int bond_option_pps_set(struct bonding *bond, struct bond_opt_value *newval)
c13ab3ff 1039{
aa59d851
NA		 1040 bond->params.packets_per_slave = newval->value;
1041 if (newval->value > 0) {
809fa972 1042 bond->params.reciprocal_packets_per_slave =
aa59d851 1043 reciprocal_value(newval->value);
809fa972
HFS		 1044 } else {
1045 /* reciprocal_packets_per_slave is unused if
1046 * packets_per_slave is 0 or 1, just initialize it
1047 */
1048 bond->params.reciprocal_packets_per_slave =
1049 (struct reciprocal_value) { 0 };
1050 }
c13ab3ff 1051
1052 return 0;
1053}
998e40bb 1054
d3131de7
NA		 1055int bond_option_lacp_rate_set(struct bonding *bond,
1056 struct bond_opt_value *newval)
998e40bb 1057{
d3131de7
NA		 1058 pr_info("%s: Setting LACP rate to %s (%llu).\n",
1059 bond->dev->name, newval->string, newval->value);
1060 bond->params.lacp_fast = newval->value;
3243c47b 1061 bond_3ad_update_lacp_rate(bond);
998e40bb 1062
1063 return 0;
1064}
ec029fac 1065
9e5f5eeb
NA		 1066int bond_option_ad_select_set(struct bonding *bond,
1067 struct bond_opt_value *newval)
ec029fac 1068{
9e5f5eeb
NA		 1069 pr_info("%s: Setting ad_select to %s (%llu).\n",
1070 bond->dev->name, newval->string, newval->value);
1071 bond->params.ad_select = newval->value;
ec029fac 1072
1073 return 0;
1074}
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