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bonding: convert lp_interval 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
ef56becb
NA		 88static struct bond_opt_value bond_num_peer_notif_tbl[] = {
89 { "off", 0, 0},
90 { "maxval", 255, BOND_VALFLAG_MAX},
91 { "default", 1, BOND_VALFLAG_DEFAULT},
92 { NULL, -1, 0}
93};
94
388d3a6d
NA		 95static struct bond_opt_value bond_primary_reselect_tbl[] = {
96 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
97 { "better", BOND_PRI_RESELECT_BETTER, 0},
98 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
99 { NULL, -1},
100};
101
0fff0608
NA		 102static struct bond_opt_value bond_use_carrier_tbl[] = {
103 { "off", 0, 0},
104 { "on", 1, BOND_VALFLAG_DEFAULT},
105 { NULL, -1, 0}
106};
107
3df01162
NA		 108static struct bond_opt_value bond_all_slaves_active_tbl[] = {
109 { "off", 0, BOND_VALFLAG_DEFAULT},
110 { "on", 1, 0},
111 { NULL, -1, 0}
112};
113
105c8fb6
NA		 114static struct bond_opt_value bond_resend_igmp_tbl[] = {
115 { "off", 0, 0},
116 { "maxval", 255, BOND_VALFLAG_MAX},
117 { "default", 1, BOND_VALFLAG_DEFAULT},
118 { NULL, -1, 0}
119};
120
4325b374
NA		 121static struct bond_opt_value bond_lp_interval_tbl[] = {
122 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
123 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
124};
125
09117362 126static struct bond_option bond_opts[] = {
2b3798d5
NA		 127 [BOND_OPT_MODE] = {
128 .id = BOND_OPT_MODE,
129 .name = "mode",
130 .desc = "bond device mode",
131 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
132 .values = bond_mode_tbl,
133 .set = bond_option_mode_set
134 },
aa59d851
NA		 135 [BOND_OPT_PACKETS_PER_SLAVE] = {
136 .id = BOND_OPT_PACKETS_PER_SLAVE,
137 .name = "packets_per_slave",
138 .desc = "Packets to send per slave in RR mode",
139 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
140 .values = bond_pps_tbl,
141 .set = bond_option_pps_set
142 },
a4b32ce7
NA		 143 [BOND_OPT_XMIT_HASH] = {
144 .id = BOND_OPT_XMIT_HASH,
145 .name = "xmit_hash_policy",
146 .desc = "balance-xor and 802.3ad hashing method",
147 .values = bond_xmit_hashtype_tbl,
148 .set = bond_option_xmit_hash_policy_set
149 },
16228881
NA		 150 [BOND_OPT_ARP_VALIDATE] = {
151 .id = BOND_OPT_ARP_VALIDATE,
152 .name = "arp_validate",
153 .desc = "validate src/dst of ARP probes",
154 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP)),
155 .values = bond_arp_validate_tbl,
156 .set = bond_option_arp_validate_set
157 },
edf36b24
NA		 158 [BOND_OPT_ARP_ALL_TARGETS] = {
159 .id = BOND_OPT_ARP_ALL_TARGETS,
160 .name = "arp_all_targets",
161 .desc = "fail on any/all arp targets timeout",
162 .values = bond_arp_all_targets_tbl,
163 .set = bond_option_arp_all_targets_set
164 },
1df6b6aa
NA		 165 [BOND_OPT_FAIL_OVER_MAC] = {
166 .id = BOND_OPT_FAIL_OVER_MAC,
167 .name = "fail_over_mac",
168 .desc = "For active-backup, do not set all slaves to the same MAC",
169 .flags = BOND_OPTFLAG_NOSLAVES,
170 .values = bond_fail_over_mac_tbl,
171 .set = bond_option_fail_over_mac_set
172 },
7bdb04ed
NA		 173 [BOND_OPT_ARP_INTERVAL] = {
174 .id = BOND_OPT_ARP_INTERVAL,
175 .name = "arp_interval",
176 .desc = "arp interval in milliseconds",
177 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
178 BIT(BOND_MODE_ALB),
179 .values = bond_intmax_tbl,
180 .set = bond_option_arp_interval_set
181 },
4fb0ef58
NA		 182 [BOND_OPT_ARP_TARGETS] = {
183 .id = BOND_OPT_ARP_TARGETS,
184 .name = "arp_ip_target",
185 .desc = "arp targets in n.n.n.n form",
186 .flags = BOND_OPTFLAG_RAWVAL,
187 .set = bond_option_arp_ip_targets_set
188 },
25a9b54a
NA		 189 [BOND_OPT_DOWNDELAY] = {
190 .id = BOND_OPT_DOWNDELAY,
191 .name = "downdelay",
192 .desc = "Delay before considering link down, in milliseconds",
193 .values = bond_intmax_tbl,
194 .set = bond_option_downdelay_set
195 },
e4994612
NA		 196 [BOND_OPT_UPDELAY] = {
197 .id = BOND_OPT_UPDELAY,
198 .name = "updelay",
199 .desc = "Delay before considering link up, in milliseconds",
200 .values = bond_intmax_tbl,
201 .set = bond_option_updelay_set
202 },
d3131de7
NA		 203 [BOND_OPT_LACP_RATE] = {
204 .id = BOND_OPT_LACP_RATE,
205 .name = "lacp_rate",
206 .desc = "LACPDU tx rate to request from 802.3ad partner",
207 .flags = BOND_OPTFLAG_IFDOWN,
208 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
209 .values = bond_lacp_rate_tbl,
210 .set = bond_option_lacp_rate_set
211 },
633ddc9e
NA		 212 [BOND_OPT_MINLINKS] = {
213 .id = BOND_OPT_MINLINKS,
214 .name = "min_links",
215 .desc = "Minimum number of available links before turning on carrier",
216 .values = bond_intmax_tbl,
217 .set = bond_option_min_links_set
218 },
9e5f5eeb
NA		 219 [BOND_OPT_AD_SELECT] = {
220 .id = BOND_OPT_AD_SELECT,
221 .name = "ad_select",
222 .desc = "803.ad aggregation selection logic",
223 .flags = BOND_OPTFLAG_IFDOWN,
224 .values = bond_ad_select_tbl,
225 .set = bond_option_ad_select_set
226 },
ef56becb
NA		 227 [BOND_OPT_NUM_PEER_NOTIF] = {
228 .id = BOND_OPT_NUM_PEER_NOTIF,
229 .name = "num_unsol_na",
230 .desc = "Number of peer notifications to send on failover event",
231 .values = bond_num_peer_notif_tbl,
232 .set = bond_option_num_peer_notif_set
233 },
b98d9c66
NA		 234 [BOND_OPT_MIIMON] = {
235 .id = BOND_OPT_MIIMON,
236 .name = "miimon",
237 .desc = "Link check interval in milliseconds",
238 .values = bond_intmax_tbl,
239 .set = bond_option_miimon_set
240 },
180222f0
NA		 241 [BOND_OPT_PRIMARY] = {
242 .id = BOND_OPT_PRIMARY,
243 .name = "primary",
244 .desc = "Primary network device to use",
245 .flags = BOND_OPTFLAG_RAWVAL,
246 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
247 BIT(BOND_MODE_TLB) |
248 BIT(BOND_MODE_ALB)),
249 .set = bond_option_primary_set
250 },
388d3a6d
NA		 251 [BOND_OPT_PRIMARY_RESELECT] = {
252 .id = BOND_OPT_PRIMARY_RESELECT,
253 .name = "primary_reselect",
254 .desc = "Reselect primary slave once it comes up",
255 .values = bond_primary_reselect_tbl,
256 .set = bond_option_primary_reselect_set
257 },
0fff0608
NA		 258 [BOND_OPT_USE_CARRIER] = {
259 .id = BOND_OPT_USE_CARRIER,
260 .name = "use_carrier",
261 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
262 .values = bond_use_carrier_tbl,
263 .set = bond_option_use_carrier_set
264 },
d1fbd3ed
NA		 265 [BOND_OPT_ACTIVE_SLAVE] = {
266 .id = BOND_OPT_ACTIVE_SLAVE,
267 .name = "active_slave",
268 .desc = "Currently active slave",
269 .flags = BOND_OPTFLAG_RAWVAL,
270 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
271 BIT(BOND_MODE_TLB) |
272 BIT(BOND_MODE_ALB)),
273 .set = bond_option_active_slave_set
274 },
24089ba1
NA		 275 [BOND_OPT_QUEUE_ID] = {
276 .id = BOND_OPT_QUEUE_ID,
277 .name = "queue_id",
278 .desc = "Set queue id of a slave",
279 .flags = BOND_OPTFLAG_RAWVAL,
280 .set = bond_option_queue_id_set
281 },
3df01162
NA		 282 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
283 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
284 .name = "all_slaves_active",
285 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
286 .values = bond_all_slaves_active_tbl,
287 .set = bond_option_all_slaves_active_set
288 },
105c8fb6
NA		 289 [BOND_OPT_RESEND_IGMP] = {
290 .id = BOND_OPT_RESEND_IGMP,
291 .name = "resend_igmp",
292 .desc = "Number of IGMP membership reports to send on link failure",
293 .values = bond_resend_igmp_tbl,
294 .set = bond_option_resend_igmp_set
295 },
4325b374
NA		 296 [BOND_OPT_LP_INTERVAL] = {
297 .id = BOND_OPT_LP_INTERVAL,
298 .name = "lp_interval",
299 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
300 .values = bond_lp_interval_tbl,
301 .set = bond_option_lp_interval_set
302 },
09117362
NA		 303 { }
304};
305
306/* Searches for a value in opt's values[] table */
307struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
308{
309 struct bond_option *opt;
310 int i;
311
312 opt = bond_opt_get(option);
313 if (WARN_ON(!opt))
314 return NULL;
315 for (i = 0; opt->values && opt->values[i].string; i++)
316 if (opt->values[i].value == val)
317 return &opt->values[i];
318
319 return NULL;
320}
321
322/* Searches for a value in opt's values[] table which matches the flagmask */
323static struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
324 u32 flagmask)
325{
326 int i;
327
328 for (i = 0; opt->values && opt->values[i].string; i++)
329 if (opt->values[i].flags & flagmask)
330 return &opt->values[i];
331
332 return NULL;
333}
334
335/* If maxval is missing then there's no range to check. In case minval is
336 * missing then it's considered to be 0.
337 */
338static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
339{
340 struct bond_opt_value *minval, *maxval;
341
342 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
343 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
344 if (!maxval || (minval && val < minval->value) || val > maxval->value)
345 return false;
346
347 return true;
348}
349
350/**
351 * bond_opt_parse - parse option value
352 * @opt: the option to parse against
353 * @val: value to parse
354 *
355 * This function tries to extract the value from @val and check if it's
356 * a possible match for the option and returns NULL if a match isn't found,
357 * or the struct_opt_value that matched. It also strips the new line from
358 * @val->string if it's present.
359 */
360struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
361 struct bond_opt_value *val)
362{
363 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
364 struct bond_opt_value *tbl, *ret = NULL;
365 bool checkval;
366 int i, rv;
367
368 /* No parsing if the option wants a raw val */
369 if (opt->flags & BOND_OPTFLAG_RAWVAL)
370 return val;
371
372 tbl = opt->values;
373 if (!tbl)
374 goto out;
375
376 /* ULLONG_MAX is used to bypass string processing */
377 checkval = val->value != ULLONG_MAX;
378 if (!checkval) {
379 if (!val->string)
380 goto out;
381 p = strchr(val->string, '\n');
382 if (p)
383 *p = '\0';
384 for (p = val->string; *p; p++)
385 if (!(isdigit(*p) || isspace(*p)))
386 break;
387 /* The following code extracts the string to match or the value
388 * and sets checkval appropriately
389 */
390 if (*p) {
391 rv = sscanf(val->string, "%32s", valstr);
392 } else {
393 rv = sscanf(val->string, "%llu", &val->value);
394 checkval = true;
395 }
396 if (!rv)
397 goto out;
398 }
399
400 for (i = 0; tbl[i].string; i++) {
401 /* Check for exact match */
402 if (checkval) {
403 if (val->value == tbl[i].value)
404 ret = &tbl[i];
405 } else {
406 if (!strcmp(valstr, "default") &&
407 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
408 ret = &tbl[i];
409
410 if (!strcmp(valstr, tbl[i].string))
411 ret = &tbl[i];
412 }
413 /* Found an exact match */
414 if (ret)
415 goto out;
416 }
417 /* Possible range match */
418 if (checkval && bond_opt_check_range(opt, val->value))
419 ret = val;
420out:
421 return ret;
422}
423
424/* Check opt's dependencies against bond mode and currently set options */
425static int bond_opt_check_deps(struct bonding *bond,
426 const struct bond_option *opt)
427{
428 struct bond_params *params = &bond->params;
429
430 if (test_bit(params->mode, &opt->unsuppmodes))
431 return -EACCES;
432 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
433 return -ENOTEMPTY;
434 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
435 return -EBUSY;
436
437 return 0;
438}
439
440static void bond_opt_dep_print(struct bonding *bond,
441 const struct bond_option *opt)
442{
2b3798d5 443 struct bond_opt_value *modeval;
09117362
NA		 444 struct bond_params *params;
445
446 params = &bond->params;
2b3798d5 447 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
09117362 448 if (test_bit(params->mode, &opt->unsuppmodes))
2b3798d5
NA		 449 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
450 bond->dev->name, opt->name,
451 modeval->string, modeval->value);
09117362
NA		 452}
453
454static void bond_opt_error_interpret(struct bonding *bond,
455 const struct bond_option *opt,
456 int error, struct bond_opt_value *val)
457{
458 struct bond_opt_value *minval, *maxval;
459 char *p;
460
461 switch (error) {
462 case -EINVAL:
463 if (val) {
464 if (val->string) {
465 /* sometimes RAWVAL opts may have new lines */
466 p = strchr(val->string, '\n');
467 if (p)
468 *p = '\0';
469 pr_err("%s: option %s: invalid value (%s).\n",
470 bond->dev->name, opt->name, val->string);
471 } else {
472 pr_err("%s: option %s: invalid value (%llu).\n",
473 bond->dev->name, opt->name, val->value);
474 }
475 }
476 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
477 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
478 if (!maxval)
479 break;
480 pr_err("%s: option %s: allowed values %llu - %llu.\n",
481 bond->dev->name, opt->name, minval ? minval->value : 0,
482 maxval->value);
483 break;
484 case -EACCES:
485 bond_opt_dep_print(bond, opt);
486 break;
487 case -ENOTEMPTY:
488 pr_err("%s: option %s: unable to set because the bond device has slaves.\n",
489 bond->dev->name, opt->name);
490 break;
491 case -EBUSY:
492 pr_err("%s: option %s: unable to set because the bond device is up.\n",
493 bond->dev->name, opt->name);
494 break;
495 default:
496 break;
497 }
498}
499
500/**
501 * __bond_opt_set - set a bonding option
502 * @bond: target bond device
503 * @option: option to set
504 * @val: value to set it to
505 *
506 * This function is used to change the bond's option value, it can be
507 * used for both enabling/changing an option and for disabling it. RTNL lock
508 * must be obtained before calling this function.
509 */
510int __bond_opt_set(struct bonding *bond,
511 unsigned int option, struct bond_opt_value *val)
512{
513 struct bond_opt_value *retval = NULL;
514 const struct bond_option *opt;
515 int ret = -ENOENT;
516
517 ASSERT_RTNL();
518
519 opt = bond_opt_get(option);
520 if (WARN_ON(!val) || WARN_ON(!opt))
521 goto out;
522 ret = bond_opt_check_deps(bond, opt);
523 if (ret)
524 goto out;
525 retval = bond_opt_parse(opt, val);
526 if (!retval) {
527 ret = -EINVAL;
528 goto out;
529 }
530 ret = opt->set(bond, retval);
531out:
532 if (ret)
533 bond_opt_error_interpret(bond, opt, ret, val);
534
535 return ret;
536}
537
538/**
539 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
540 * @bond: target bond device
541 * @option: option to set
542 * @buf: value to set it to
543 *
544 * This function tries to acquire RTNL without blocking and if successful
545 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
546 */
547int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
548{
549 struct bond_opt_value optval;
550 int ret;
551
552 if (!rtnl_trylock())
553 return restart_syscall();
554 bond_opt_initstr(&optval, buf);
555 ret = __bond_opt_set(bond, option, &optval);
556 rtnl_unlock();
557
558 return ret;
559}
560
561/**
562 * bond_opt_get - get a pointer to an option
563 * @option: option for which to return a pointer
564 *
565 * This function checks if option is valid and if so returns a pointer
566 * to its entry in the bond_opts[] option array.
567 */
568struct bond_option *bond_opt_get(unsigned int option)
569{
570 if (!BOND_OPT_VALID(option))
571 return NULL;
572
573 return &bond_opts[option];
574}
575
2b3798d5 576int bond_option_mode_set(struct bonding *bond, struct bond_opt_value *newval)
72be35fe 577{
2b3798d5 578 if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
fe9d04af 579 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
2b3798d5 580 bond->dev->name, newval->string);
fe9d04af 581 /* disable arp monitoring */
582 bond->params.arp_interval = 0;
583 /* set miimon to default value */
584 bond->params.miimon = BOND_DEFAULT_MIIMON;
585 pr_info("%s: Setting MII monitoring interval to %d.\n",
586 bond->dev->name, bond->params.miimon);
72be35fe
JP		 587 }
588
589 /* don't cache arp_validate between modes */
590 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
2b3798d5
NA		 591 bond->params.mode = newval->value;
592
72be35fe
JP		 593 return 0;
594}
d9e32b21 595
752d48b5
JP		 596static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
597 struct slave *slave)
598{
599 return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
600}
601
602struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
603{
604 struct slave *slave = rcu_dereference(bond->curr_active_slave);
605
606 return __bond_option_active_slave_get(bond, slave);
607}
608
609struct net_device *bond_option_active_slave_get(struct bonding *bond)
610{
611 return __bond_option_active_slave_get(bond, bond->curr_active_slave);
612}
613
d9e32b21 614int bond_option_active_slave_set(struct bonding *bond,
d1fbd3ed 615 struct bond_opt_value *newval)
d9e32b21 616{
d1fbd3ed
NA		 617 char ifname[IFNAMSIZ] = { 0, };
618 struct net_device *slave_dev;
d9e32b21
JP		 619 int ret = 0;
620
d1fbd3ed
NA		 621 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
622 if (!strlen(ifname) || newval->string[0] == '\n') {
623 slave_dev = NULL;
624 } else {
625 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
626 if (!slave_dev)
627 return -ENODEV;
628 }
629
d9e32b21
JP		 630 if (slave_dev) {
631 if (!netif_is_bond_slave(slave_dev)) {
632 pr_err("Device %s is not bonding slave.\n",
633 slave_dev->name);
634 return -EINVAL;
635 }
636
637 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
638 pr_err("%s: Device %s is not our slave.\n",
639 bond->dev->name, slave_dev->name);
640 return -EINVAL;
641 }
642 }
643
d9e32b21 644 block_netpoll_tx();
d9e32b21
JP		 645 write_lock_bh(&bond->curr_slave_lock);
646
647 /* check to see if we are clearing active */
648 if (!slave_dev) {
649 pr_info("%s: Clearing current active slave.\n",
650 bond->dev->name);
651 rcu_assign_pointer(bond->curr_active_slave, NULL);
652 bond_select_active_slave(bond);
653 } else {
654 struct slave *old_active = bond->curr_active_slave;
655 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
656
657 BUG_ON(!new_active);
658
659 if (new_active == old_active) {
660 /* do nothing */
661 pr_info("%s: %s is already the current active slave.\n",
662 bond->dev->name, new_active->dev->name);
663 } else {
664 if (old_active && (new_active->link == BOND_LINK_UP) &&
665 IS_UP(new_active->dev)) {
666 pr_info("%s: Setting %s as active slave.\n",
667 bond->dev->name, new_active->dev->name);
668 bond_change_active_slave(bond, new_active);
669 } else {
670 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down.\n",
671 bond->dev->name, new_active->dev->name,
672 new_active->dev->name);
673 ret = -EINVAL;
674 }
675 }
676 }
677
678 write_unlock_bh(&bond->curr_slave_lock);
d9e32b21 679 unblock_netpoll_tx();
d1fbd3ed 680
d9e32b21
JP		 681 return ret;
682}
eecdaa6e 683
b98d9c66 684int bond_option_miimon_set(struct bonding *bond, struct bond_opt_value *newval)
eecdaa6e 685{
b98d9c66
NA		 686 pr_info("%s: Setting MII monitoring interval to %llu.\n",
687 bond->dev->name, newval->value);
688 bond->params.miimon = newval->value;
eecdaa6e 689 if (bond->params.updelay)
690 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value.\n",
691 bond->dev->name,
692 bond->params.updelay * bond->params.miimon);
693 if (bond->params.downdelay)
694 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value.\n",
695 bond->dev->name,
696 bond->params.downdelay * bond->params.miimon);
b98d9c66 697 if (newval->value && bond->params.arp_interval) {
eecdaa6e 698 pr_info("%s: MII monitoring cannot be used with ARP monitoring. Disabling ARP monitoring...\n",
699 bond->dev->name);
700 bond->params.arp_interval = 0;
701 if (bond->params.arp_validate)
702 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
703 }
704 if (bond->dev->flags & IFF_UP) {
705 /* If the interface is up, we may need to fire off
706 * the MII timer. If the interface is down, the
707 * timer will get fired off when the open function
708 * is called.
709 */
b98d9c66 710 if (!newval->value) {
eecdaa6e 711 cancel_delayed_work_sync(&bond->mii_work);
712 } else {
713 cancel_delayed_work_sync(&bond->arp_work);
714 queue_delayed_work(bond->wq, &bond->mii_work, 0);
715 }
716 }
b98d9c66 717
eecdaa6e 718 return 0;
719}
25852e29 720
e4994612 721int bond_option_updelay_set(struct bonding *bond, struct bond_opt_value *newval)
25852e29 722{
e4994612 723 if (!bond->params.miimon) {
25852e29 724 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
725 bond->dev->name);
726 return -EPERM;
727 }
e4994612
NA		 728 if ((newval->value % bond->params.miimon) != 0) {
729 pr_warn("%s: Warning: up delay (%llu) is not a multiple of miimon (%d), updelay rounded to %llu ms\n",
730 bond->dev->name, newval->value,
731 bond->params.miimon,
732 (newval->value / bond->params.miimon) *
733 bond->params.miimon);
25852e29 734 }
e4994612
NA		 735 bond->params.updelay = newval->value / bond->params.miimon;
736 pr_info("%s: Setting up delay to %d.\n",
737 bond->dev->name,
738 bond->params.updelay * bond->params.miimon);
25852e29 739
740 return 0;
741}
c7461f9b 742
25a9b54a
NA		 743int bond_option_downdelay_set(struct bonding *bond,
744 struct bond_opt_value *newval)
c7461f9b 745{
25a9b54a 746 if (!bond->params.miimon) {
c7461f9b 747 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
748 bond->dev->name);
749 return -EPERM;
750 }
25a9b54a
NA		 751 if ((newval->value % bond->params.miimon) != 0) {
752 pr_warn("%s: Warning: down delay (%llu) is not a multiple of miimon (%d), delay rounded to %llu ms\n",
753 bond->dev->name, newval->value,
754 bond->params.miimon,
755 (newval->value / bond->params.miimon) *
756 bond->params.miimon);
c7461f9b 757 }
25a9b54a
NA		 758 bond->params.downdelay = newval->value / bond->params.miimon;
759 pr_info("%s: Setting down delay to %d.\n",
760 bond->dev->name,
761 bond->params.downdelay * bond->params.miimon);
c7461f9b 762
763 return 0;
764}
9f53e14e 765
0fff0608
NA		 766int bond_option_use_carrier_set(struct bonding *bond,
767 struct bond_opt_value *newval)
9f53e14e 768{
0fff0608
NA		 769 pr_info("%s: Setting use_carrier to %llu.\n",
770 bond->dev->name, newval->value);
771 bond->params.use_carrier = newval->value;
9f53e14e 772
773 return 0;
774}
06151dbc 775
7bdb04ed
NA		 776int bond_option_arp_interval_set(struct bonding *bond,
777 struct bond_opt_value *newval)
06151dbc 778{
7bdb04ed
NA		 779 pr_info("%s: Setting ARP monitoring interval to %llu.\n",
780 bond->dev->name, newval->value);
781 bond->params.arp_interval = newval->value;
782 if (newval->value) {
06151dbc 783 if (bond->params.miimon) {
784 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring.\n",
785 bond->dev->name, bond->dev->name);
786 bond->params.miimon = 0;
787 }
788 if (!bond->params.arp_targets[0])
789 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified.\n",
790 bond->dev->name);
791 }
792 if (bond->dev->flags & IFF_UP) {
793 /* If the interface is up, we may need to fire off
794 * the ARP timer. If the interface is down, the
795 * timer will get fired off when the open function
796 * is called.
797 */
7bdb04ed 798 if (!newval->value) {
06151dbc 799 if (bond->params.arp_validate)
800 bond->recv_probe = NULL;
801 cancel_delayed_work_sync(&bond->arp_work);
802 } else {
803 /* arp_validate can be set only in active-backup mode */
804 if (bond->params.arp_validate)
805 bond->recv_probe = bond_arp_rcv;
806 cancel_delayed_work_sync(&bond->mii_work);
807 queue_delayed_work(bond->wq, &bond->arp_work, 0);
808 }
809 }
810
811 return 0;
812}
7f28fa10 813
814static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
815 __be32 target,
816 unsigned long last_rx)
817{
818 __be32 *targets = bond->params.arp_targets;
819 struct list_head *iter;
820 struct slave *slave;
821
822 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
823 bond_for_each_slave(bond, slave, iter)
824 slave->target_last_arp_rx[slot] = last_rx;
825 targets[slot] = target;
826 }
827}
828
829static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
830{
831 __be32 *targets = bond->params.arp_targets;
832 int ind;
833
834 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
835 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
836 bond->dev->name, &target);
837 return -EINVAL;
838 }
839
840 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
841 pr_err("%s: ARP target %pI4 is already present\n",
842 bond->dev->name, &target);
843 return -EINVAL;
844 }
845
846 ind = bond_get_targets_ip(targets, 0); /* first free slot */
847 if (ind == -1) {
848 pr_err("%s: ARP target table is full!\n",
849 bond->dev->name);
850 return -EINVAL;
851 }
852
853 pr_info("%s: adding ARP target %pI4.\n", bond->dev->name, &target);
854
855 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
856
857 return 0;
858}
859
860int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
861{
862 int ret;
863
864 /* not to race with bond_arp_rcv */
865 write_lock_bh(&bond->lock);
866 ret = _bond_option_arp_ip_target_add(bond, target);
867 write_unlock_bh(&bond->lock);
868
869 return ret;
870}
871
872int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
873{
874 __be32 *targets = bond->params.arp_targets;
875 struct list_head *iter;
876 struct slave *slave;
877 unsigned long *targets_rx;
878 int ind, i;
879
880 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
881 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
882 bond->dev->name, &target);
883 return -EINVAL;
884 }
885
886 ind = bond_get_targets_ip(targets, target);
887 if (ind == -1) {
888 pr_err("%s: unable to remove nonexistent ARP target %pI4.\n",
889 bond->dev->name, &target);
890 return -EINVAL;
891 }
892
893 if (ind == 0 && !targets[1] && bond->params.arp_interval)
894 pr_warn("%s: removing last arp target with arp_interval on\n",
895 bond->dev->name);
896
897 pr_info("%s: removing ARP target %pI4.\n", bond->dev->name,
898 &target);
899
900 /* not to race with bond_arp_rcv */
901 write_lock_bh(&bond->lock);
902
903 bond_for_each_slave(bond, slave, iter) {
904 targets_rx = slave->target_last_arp_rx;
905 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
906 targets_rx[i] = targets_rx[i+1];
907 targets_rx[i] = 0;
908 }
909 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
910 targets[i] = targets[i+1];
911 targets[i] = 0;
912
913 write_unlock_bh(&bond->lock);
914
915 return 0;
916}
917
4fb0ef58 918void bond_option_arp_ip_targets_clear(struct bonding *bond)
7f28fa10 919{
4fb0ef58 920 int i;
7f28fa10 921
922 /* not to race with bond_arp_rcv */
923 write_lock_bh(&bond->lock);
7f28fa10 924 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
925 _bond_options_arp_ip_target_set(bond, i, 0, 0);
4fb0ef58
NA		 926 write_unlock_bh(&bond->lock);
927}
7f28fa10 928
4fb0ef58
NA		 929int bond_option_arp_ip_targets_set(struct bonding *bond,
930 struct bond_opt_value *newval)
931{
932 int ret = -EPERM;
933 __be32 target;
934
935 if (newval->string) {
936 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
937 pr_err("%s: invalid ARP target %pI4 specified\n",
938 bond->dev->name, &target);
939 return ret;
940 }
941 if (newval->string[0] == '+')
942 ret = bond_option_arp_ip_target_add(bond, target);
943 else if (newval->string[0] == '-')
944 ret = bond_option_arp_ip_target_rem(bond, target);
945 else
946 pr_err("no command found in arp_ip_targets file for bond %s. Use +<addr> or -<addr>.\n",
947 bond->dev->name);
948 } else {
949 target = newval->value;
950 ret = bond_option_arp_ip_target_add(bond, target);
7f28fa10 951 }
952
7f28fa10 953 return ret;
954}
29c49482 955
16228881
NA		 956int bond_option_arp_validate_set(struct bonding *bond,
957 struct bond_opt_value *newval)
29c49482 958{
16228881
NA		 959 pr_info("%s: setting arp_validate to %s (%llu).\n",
960 bond->dev->name, newval->string, newval->value);
29c49482 961
962 if (bond->dev->flags & IFF_UP) {
16228881 963 if (!newval->value)
29c49482 964 bond->recv_probe = NULL;
965 else if (bond->params.arp_interval)
966 bond->recv_probe = bond_arp_rcv;
967 }
16228881 968 bond->params.arp_validate = newval->value;
29c49482 969
970 return 0;
971}
d5c84254 972
edf36b24
NA		 973int bond_option_arp_all_targets_set(struct bonding *bond,
974 struct bond_opt_value *newval)
d5c84254 975{
edf36b24
NA		 976 pr_info("%s: setting arp_all_targets to %s (%llu).\n",
977 bond->dev->name, newval->string, newval->value);
978 bond->params.arp_all_targets = newval->value;
d5c84254 979
980 return 0;
981}
0a98a0d1 982
180222f0 983int bond_option_primary_set(struct bonding *bond, struct bond_opt_value *newval)
0a98a0d1 984{
180222f0 985 char *p, *primary = newval->string;
0a98a0d1 986 struct list_head *iter;
987 struct slave *slave;
0a98a0d1 988
989 block_netpoll_tx();
990 read_lock(&bond->lock);
991 write_lock_bh(&bond->curr_slave_lock);
992
180222f0
NA		 993 p = strchr(primary, '\n');
994 if (p)
995 *p = '\0';
0a98a0d1 996 /* check to see if we are clearing primary */
997 if (!strlen(primary)) {
998 pr_info("%s: Setting primary slave to None.\n",
999 bond->dev->name);
1000 bond->primary_slave = NULL;
1001 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1002 bond_select_active_slave(bond);
1003 goto out;
1004 }
1005
1006 bond_for_each_slave(bond, slave, iter) {
1007 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1008 pr_info("%s: Setting %s as primary slave.\n",
1009 bond->dev->name, slave->dev->name);
1010 bond->primary_slave = slave;
1011 strcpy(bond->params.primary, slave->dev->name);
1012 bond_select_active_slave(bond);
1013 goto out;
1014 }
1015 }
1016
1017 strncpy(bond->params.primary, primary, IFNAMSIZ);
1018 bond->params.primary[IFNAMSIZ - 1] = 0;
1019
1020 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet.\n",
1021 bond->dev->name, primary, bond->dev->name);
1022
1023out:
1024 write_unlock_bh(&bond->curr_slave_lock);
1025 read_unlock(&bond->lock);
1026 unblock_netpoll_tx();
1027
180222f0 1028 return 0;
0a98a0d1 1029}
8a41ae44 1030
388d3a6d
NA		 1031int bond_option_primary_reselect_set(struct bonding *bond,
1032 struct bond_opt_value *newval)
8a41ae44 1033{
388d3a6d
NA		 1034 pr_info("%s: setting primary_reselect to %s (%llu).\n",
1035 bond->dev->name, newval->string, newval->value);
1036 bond->params.primary_reselect = newval->value;
8a41ae44 1037
1038 block_netpoll_tx();
1039 write_lock_bh(&bond->curr_slave_lock);
1040 bond_select_active_slave(bond);
1041 write_unlock_bh(&bond->curr_slave_lock);
1042 unblock_netpoll_tx();
1043
1044 return 0;
1045}
89901972 1046
1df6b6aa
NA		 1047int bond_option_fail_over_mac_set(struct bonding *bond,
1048 struct bond_opt_value *newval)
89901972 1049{
1df6b6aa
NA		 1050 pr_info("%s: Setting fail_over_mac to %s (%llu).\n",
1051 bond->dev->name, newval->string, newval->value);
1052 bond->params.fail_over_mac = newval->value;
89901972 1053
1054 return 0;
1055}
f70161c6 1056
a4b32ce7
NA		 1057int bond_option_xmit_hash_policy_set(struct bonding *bond,
1058 struct bond_opt_value *newval)
f70161c6 1059{
a4b32ce7
NA		 1060 pr_info("%s: setting xmit hash policy to %s (%llu).\n",
1061 bond->dev->name, newval->string, newval->value);
1062 bond->params.xmit_policy = newval->value;
f70161c6 1063
1064 return 0;
1065}
d8838de7 1066
105c8fb6
NA		 1067int bond_option_resend_igmp_set(struct bonding *bond,
1068 struct bond_opt_value *newval)
d8838de7 1069{
105c8fb6
NA		 1070 pr_info("%s: Setting resend_igmp to %llu.\n",
1071 bond->dev->name, newval->value);
1072 bond->params.resend_igmp = newval->value;
d8838de7 1073
1074 return 0;
1075}
2c9839c1 1076
ef56becb
NA		 1077int bond_option_num_peer_notif_set(struct bonding *bond,
1078 struct bond_opt_value *newval)
2c9839c1 1079{
ef56becb
NA		 1080 bond->params.num_peer_notif = newval->value;
1081
2c9839c1 1082 return 0;
1083}
1cc0b1e3 1084
1085int bond_option_all_slaves_active_set(struct bonding *bond,
3df01162 1086 struct bond_opt_value *newval)
1cc0b1e3 1087{
1088 struct list_head *iter;
1089 struct slave *slave;
1090
3df01162 1091 if (newval->value == bond->params.all_slaves_active)
1cc0b1e3 1092 return 0;
3df01162 1093 bond->params.all_slaves_active = newval->value;
1cc0b1e3 1094 bond_for_each_slave(bond, slave, iter) {
1095 if (!bond_is_active_slave(slave)) {
3df01162 1096 if (newval->value)
1cc0b1e3 1097 slave->inactive = 0;
1098 else
1099 slave->inactive = 1;
1100 }
1101 }
1102
1103 return 0;
1104}
7d101008 1105
633ddc9e
NA		 1106int bond_option_min_links_set(struct bonding *bond,
1107 struct bond_opt_value *newval)
7d101008 1108{
633ddc9e
NA		 1109 pr_info("%s: Setting min links value to %llu\n",
1110 bond->dev->name, newval->value);
1111 bond->params.min_links = newval->value;
7d101008 1112
1113 return 0;
1114}
8d836d09 1115
4325b374
NA		 1116int bond_option_lp_interval_set(struct bonding *bond,
1117 struct bond_opt_value *newval)
8d836d09 1118{
4325b374 1119 bond->params.lp_interval = newval->value;
8d836d09 1120
1121 return 0;
1122}
c13ab3ff 1123
aa59d851 1124int bond_option_pps_set(struct bonding *bond, struct bond_opt_value *newval)
c13ab3ff 1125{
aa59d851
NA		 1126 bond->params.packets_per_slave = newval->value;
1127 if (newval->value > 0) {
809fa972 1128 bond->params.reciprocal_packets_per_slave =
aa59d851 1129 reciprocal_value(newval->value);
809fa972
HFS		 1130 } else {
1131 /* reciprocal_packets_per_slave is unused if
1132 * packets_per_slave is 0 or 1, just initialize it
1133 */
1134 bond->params.reciprocal_packets_per_slave =
1135 (struct reciprocal_value) { 0 };
1136 }
c13ab3ff 1137
1138 return 0;
1139}
998e40bb 1140
d3131de7
NA		 1141int bond_option_lacp_rate_set(struct bonding *bond,
1142 struct bond_opt_value *newval)
998e40bb 1143{
d3131de7
NA		 1144 pr_info("%s: Setting LACP rate to %s (%llu).\n",
1145 bond->dev->name, newval->string, newval->value);
1146 bond->params.lacp_fast = newval->value;
3243c47b 1147 bond_3ad_update_lacp_rate(bond);
998e40bb 1148
1149 return 0;
1150}
ec029fac 1151
9e5f5eeb
NA		 1152int bond_option_ad_select_set(struct bonding *bond,
1153 struct bond_opt_value *newval)
ec029fac 1154{
9e5f5eeb
NA		 1155 pr_info("%s: Setting ad_select to %s (%llu).\n",
1156 bond->dev->name, newval->string, newval->value);
1157 bond->params.ad_select = newval->value;
ec029fac 1158
1159 return 0;
1160}
24089ba1
NA		 1161
1162int bond_option_queue_id_set(struct bonding *bond,
1163 struct bond_opt_value *newval)
1164{
1165 struct slave *slave, *update_slave;
1166 struct net_device *sdev;
1167 struct list_head *iter;
1168 char *delim;
1169 int ret = 0;
1170 u16 qid;
1171
1172 /* delim will point to queue id if successful */
1173 delim = strchr(newval->string, ':');
1174 if (!delim)
1175 goto err_no_cmd;
1176
1177 /* Terminate string that points to device name and bump it
1178 * up one, so we can read the queue id there.
1179 */
1180 *delim = '\0';
1181 if (sscanf(++delim, "%hd\n", &qid) != 1)
1182 goto err_no_cmd;
1183
1184 /* Check buffer length, valid ifname and queue id */
1185 if (strlen(newval->string) > IFNAMSIZ ||
1186 !dev_valid_name(newval->string) ||
1187 qid > bond->dev->real_num_tx_queues)
1188 goto err_no_cmd;
1189
1190 /* Get the pointer to that interface if it exists */
1191 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1192 if (!sdev)
1193 goto err_no_cmd;
1194
1195 /* Search for thes slave and check for duplicate qids */
1196 update_slave = NULL;
1197 bond_for_each_slave(bond, slave, iter) {
1198 if (sdev == slave->dev)
1199 /* We don't need to check the matching
1200 * slave for dups, since we're overwriting it
1201 */
1202 update_slave = slave;
1203 else if (qid && qid == slave->queue_id) {
1204 goto err_no_cmd;
1205 }
1206 }
1207
1208 if (!update_slave)
1209 goto err_no_cmd;
1210
1211 /* Actually set the qids for the slave */
1212 update_slave->queue_id = qid;
1213
1214out:
1215 return ret;
1216
1217err_no_cmd:
1218 pr_info("invalid input for queue_id set for %s.\n",
1219 bond->dev->name);
1220 ret = -EPERM;
1221 goto out;
1222
1223}
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