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