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