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1/*
2 * drivers/net/bond/bond_options.c - bonding options
3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
4 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
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>
16#include <linux/netdevice.h>
17#include <linux/spinlock.h>
18#include <linux/rcupdate.h>
19#include <linux/ctype.h>
20#include <linux/inet.h>
21#include "bonding.h"
22
23static int bond_option_active_slave_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25static int bond_option_miimon_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27static int bond_option_updelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29static int bond_option_downdelay_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31static int bond_option_use_carrier_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33static int bond_option_arp_interval_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
36static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
37static int bond_option_arp_ip_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39static int bond_option_arp_validate_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41static int bond_option_arp_all_targets_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43static int bond_option_primary_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45static int bond_option_primary_reselect_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47static int bond_option_fail_over_mac_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49static int bond_option_xmit_hash_policy_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51static int bond_option_resend_igmp_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53static int bond_option_num_peer_notif_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55static int bond_option_all_slaves_active_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57static int bond_option_min_links_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59static int bond_option_lp_interval_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61static int bond_option_pps_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63static int bond_option_lacp_rate_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65static int bond_option_ad_select_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67static int bond_option_queue_id_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69static int bond_option_mode_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71static int bond_option_slaves_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73
74
75static const struct bond_opt_value bond_mode_tbl[] = {
76 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
77 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
78 { "balance-xor", BOND_MODE_XOR, 0},
79 { "broadcast", BOND_MODE_BROADCAST, 0},
80 { "802.3ad", BOND_MODE_8023AD, 0},
81 { "balance-tlb", BOND_MODE_TLB, 0},
82 { "balance-alb", BOND_MODE_ALB, 0},
83 { NULL, -1, 0},
84};
85
86static const struct bond_opt_value bond_pps_tbl[] = {
87 { "default", 1, BOND_VALFLAG_DEFAULT},
88 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
89 { NULL, -1, 0},
90};
91
92static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
93 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
94 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
95 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
96 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
97 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
98 { NULL, -1, 0},
99};
100
101static const struct bond_opt_value bond_arp_validate_tbl[] = {
102 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
103 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
104 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
105 { "all", BOND_ARP_VALIDATE_ALL, 0},
106 { "filter", BOND_ARP_FILTER, 0},
107 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
108 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
109 { NULL, -1, 0},
110};
111
112static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
113 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
114 { "all", BOND_ARP_TARGETS_ALL, 0},
115 { NULL, -1, 0},
116};
117
118static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
119 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
120 { "active", BOND_FOM_ACTIVE, 0},
121 { "follow", BOND_FOM_FOLLOW, 0},
122 { NULL, -1, 0},
123};
124
125static const struct bond_opt_value bond_intmax_tbl[] = {
126 { "off", 0, BOND_VALFLAG_DEFAULT},
127 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
128 { NULL, -1, 0}
129};
130
131static const struct bond_opt_value bond_lacp_rate_tbl[] = {
132 { "slow", AD_LACP_SLOW, 0},
133 { "fast", AD_LACP_FAST, 0},
134 { NULL, -1, 0},
135};
136
137static const struct bond_opt_value bond_ad_select_tbl[] = {
138 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
139 { "bandwidth", BOND_AD_BANDWIDTH, 0},
140 { "count", BOND_AD_COUNT, 0},
141 { NULL, -1, 0},
142};
143
144static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
145 { "off", 0, 0},
146 { "maxval", 255, BOND_VALFLAG_MAX},
147 { "default", 1, BOND_VALFLAG_DEFAULT},
148 { NULL, -1, 0}
149};
150
151static const struct bond_opt_value bond_primary_reselect_tbl[] = {
152 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
153 { "better", BOND_PRI_RESELECT_BETTER, 0},
154 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
155 { NULL, -1},
156};
157
158static const struct bond_opt_value bond_use_carrier_tbl[] = {
159 { "off", 0, 0},
160 { "on", 1, BOND_VALFLAG_DEFAULT},
161 { NULL, -1, 0}
162};
163
164static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
165 { "off", 0, BOND_VALFLAG_DEFAULT},
166 { "on", 1, 0},
167 { NULL, -1, 0}
168};
169
170static const struct bond_opt_value bond_resend_igmp_tbl[] = {
171 { "off", 0, 0},
172 { "maxval", 255, BOND_VALFLAG_MAX},
173 { "default", 1, BOND_VALFLAG_DEFAULT},
174 { NULL, -1, 0}
175};
176
177static const struct bond_opt_value bond_lp_interval_tbl[] = {
178 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
179 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
180 { NULL, -1, 0},
181};
182
183static const struct bond_option bond_opts[] = {
184 [BOND_OPT_MODE] = {
185 .id = BOND_OPT_MODE,
186 .name = "mode",
187 .desc = "bond device mode",
188 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
189 .values = bond_mode_tbl,
190 .set = bond_option_mode_set
191 },
192 [BOND_OPT_PACKETS_PER_SLAVE] = {
193 .id = BOND_OPT_PACKETS_PER_SLAVE,
194 .name = "packets_per_slave",
195 .desc = "Packets to send per slave in RR mode",
196 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
197 .values = bond_pps_tbl,
198 .set = bond_option_pps_set
199 },
200 [BOND_OPT_XMIT_HASH] = {
201 .id = BOND_OPT_XMIT_HASH,
202 .name = "xmit_hash_policy",
203 .desc = "balance-xor and 802.3ad hashing method",
204 .values = bond_xmit_hashtype_tbl,
205 .set = bond_option_xmit_hash_policy_set
206 },
207 [BOND_OPT_ARP_VALIDATE] = {
208 .id = BOND_OPT_ARP_VALIDATE,
209 .name = "arp_validate",
210 .desc = "validate src/dst of ARP probes",
211 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
212 BIT(BOND_MODE_ALB),
213 .values = bond_arp_validate_tbl,
214 .set = bond_option_arp_validate_set
215 },
216 [BOND_OPT_ARP_ALL_TARGETS] = {
217 .id = BOND_OPT_ARP_ALL_TARGETS,
218 .name = "arp_all_targets",
219 .desc = "fail on any/all arp targets timeout",
220 .values = bond_arp_all_targets_tbl,
221 .set = bond_option_arp_all_targets_set
222 },
223 [BOND_OPT_FAIL_OVER_MAC] = {
224 .id = BOND_OPT_FAIL_OVER_MAC,
225 .name = "fail_over_mac",
226 .desc = "For active-backup, do not set all slaves to the same MAC",
227 .flags = BOND_OPTFLAG_NOSLAVES,
228 .values = bond_fail_over_mac_tbl,
229 .set = bond_option_fail_over_mac_set
230 },
231 [BOND_OPT_ARP_INTERVAL] = {
232 .id = BOND_OPT_ARP_INTERVAL,
233 .name = "arp_interval",
234 .desc = "arp interval in milliseconds",
235 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
236 BIT(BOND_MODE_ALB),
237 .values = bond_intmax_tbl,
238 .set = bond_option_arp_interval_set
239 },
240 [BOND_OPT_ARP_TARGETS] = {
241 .id = BOND_OPT_ARP_TARGETS,
242 .name = "arp_ip_target",
243 .desc = "arp targets in n.n.n.n form",
244 .flags = BOND_OPTFLAG_RAWVAL,
245 .set = bond_option_arp_ip_targets_set
246 },
247 [BOND_OPT_DOWNDELAY] = {
248 .id = BOND_OPT_DOWNDELAY,
249 .name = "downdelay",
250 .desc = "Delay before considering link down, in milliseconds",
251 .values = bond_intmax_tbl,
252 .set = bond_option_downdelay_set
253 },
254 [BOND_OPT_UPDELAY] = {
255 .id = BOND_OPT_UPDELAY,
256 .name = "updelay",
257 .desc = "Delay before considering link up, in milliseconds",
258 .values = bond_intmax_tbl,
259 .set = bond_option_updelay_set
260 },
261 [BOND_OPT_LACP_RATE] = {
262 .id = BOND_OPT_LACP_RATE,
263 .name = "lacp_rate",
264 .desc = "LACPDU tx rate to request from 802.3ad partner",
265 .flags = BOND_OPTFLAG_IFDOWN,
266 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
267 .values = bond_lacp_rate_tbl,
268 .set = bond_option_lacp_rate_set
269 },
270 [BOND_OPT_MINLINKS] = {
271 .id = BOND_OPT_MINLINKS,
272 .name = "min_links",
273 .desc = "Minimum number of available links before turning on carrier",
274 .values = bond_intmax_tbl,
275 .set = bond_option_min_links_set
276 },
277 [BOND_OPT_AD_SELECT] = {
278 .id = BOND_OPT_AD_SELECT,
279 .name = "ad_select",
280 .desc = "803.ad aggregation selection logic",
281 .flags = BOND_OPTFLAG_IFDOWN,
282 .values = bond_ad_select_tbl,
283 .set = bond_option_ad_select_set
284 },
285 [BOND_OPT_NUM_PEER_NOTIF] = {
286 .id = BOND_OPT_NUM_PEER_NOTIF,
287 .name = "num_unsol_na",
288 .desc = "Number of peer notifications to send on failover event",
289 .values = bond_num_peer_notif_tbl,
290 .set = bond_option_num_peer_notif_set
291 },
292 [BOND_OPT_MIIMON] = {
293 .id = BOND_OPT_MIIMON,
294 .name = "miimon",
295 .desc = "Link check interval in milliseconds",
296 .values = bond_intmax_tbl,
297 .set = bond_option_miimon_set
298 },
299 [BOND_OPT_PRIMARY] = {
300 .id = BOND_OPT_PRIMARY,
301 .name = "primary",
302 .desc = "Primary network device to use",
303 .flags = BOND_OPTFLAG_RAWVAL,
304 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
305 BIT(BOND_MODE_TLB) |
306 BIT(BOND_MODE_ALB)),
307 .set = bond_option_primary_set
308 },
309 [BOND_OPT_PRIMARY_RESELECT] = {
310 .id = BOND_OPT_PRIMARY_RESELECT,
311 .name = "primary_reselect",
312 .desc = "Reselect primary slave once it comes up",
313 .values = bond_primary_reselect_tbl,
314 .set = bond_option_primary_reselect_set
315 },
316 [BOND_OPT_USE_CARRIER] = {
317 .id = BOND_OPT_USE_CARRIER,
318 .name = "use_carrier",
319 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
320 .values = bond_use_carrier_tbl,
321 .set = bond_option_use_carrier_set
322 },
323 [BOND_OPT_ACTIVE_SLAVE] = {
324 .id = BOND_OPT_ACTIVE_SLAVE,
325 .name = "active_slave",
326 .desc = "Currently active slave",
327 .flags = BOND_OPTFLAG_RAWVAL,
328 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
329 BIT(BOND_MODE_TLB) |
330 BIT(BOND_MODE_ALB)),
331 .set = bond_option_active_slave_set
332 },
333 [BOND_OPT_QUEUE_ID] = {
334 .id = BOND_OPT_QUEUE_ID,
335 .name = "queue_id",
336 .desc = "Set queue id of a slave",
337 .flags = BOND_OPTFLAG_RAWVAL,
338 .set = bond_option_queue_id_set
339 },
340 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
341 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
342 .name = "all_slaves_active",
343 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
344 .values = bond_all_slaves_active_tbl,
345 .set = bond_option_all_slaves_active_set
346 },
347 [BOND_OPT_RESEND_IGMP] = {
348 .id = BOND_OPT_RESEND_IGMP,
349 .name = "resend_igmp",
350 .desc = "Number of IGMP membership reports to send on link failure",
351 .values = bond_resend_igmp_tbl,
352 .set = bond_option_resend_igmp_set
353 },
354 [BOND_OPT_LP_INTERVAL] = {
355 .id = BOND_OPT_LP_INTERVAL,
356 .name = "lp_interval",
357 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
358 .values = bond_lp_interval_tbl,
359 .set = bond_option_lp_interval_set
360 },
361 [BOND_OPT_SLAVES] = {
362 .id = BOND_OPT_SLAVES,
363 .name = "slaves",
364 .desc = "Slave membership management",
365 .flags = BOND_OPTFLAG_RAWVAL,
366 .set = bond_option_slaves_set
367 },
368 { }
369};
370
371/* Searches for a value in opt's values[] table */
372const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
373{
374 const struct bond_option *opt;
375 int i;
376
377 opt = bond_opt_get(option);
378 if (WARN_ON(!opt))
379 return NULL;
380 for (i = 0; opt->values && opt->values[i].string; i++)
381 if (opt->values[i].value == val)
382 return &opt->values[i];
383
384 return NULL;
385}
386
387/* Searches for a value in opt's values[] table which matches the flagmask */
388static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
389 u32 flagmask)
390{
391 int i;
392
393 for (i = 0; opt->values && opt->values[i].string; i++)
394 if (opt->values[i].flags & flagmask)
395 return &opt->values[i];
396
397 return NULL;
398}
399
400/* If maxval is missing then there's no range to check. In case minval is
401 * missing then it's considered to be 0.
402 */
403static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
404{
405 const struct bond_opt_value *minval, *maxval;
406
407 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
408 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
409 if (!maxval || (minval && val < minval->value) || val > maxval->value)
410 return false;
411
412 return true;
413}
414
415/**
416 * bond_opt_parse - parse option value
417 * @opt: the option to parse against
418 * @val: value to parse
419 *
420 * This function tries to extract the value from @val and check if it's
421 * a possible match for the option and returns NULL if a match isn't found,
422 * or the struct_opt_value that matched. It also strips the new line from
423 * @val->string if it's present.
424 */
425const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
426 struct bond_opt_value *val)
427{
428 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
429 const struct bond_opt_value *tbl;
430 const struct bond_opt_value *ret = NULL;
431 bool checkval;
432 int i, rv;
433
434 /* No parsing if the option wants a raw val */
435 if (opt->flags & BOND_OPTFLAG_RAWVAL)
436 return val;
437
438 tbl = opt->values;
439 if (!tbl)
440 goto out;
441
442 /* ULLONG_MAX is used to bypass string processing */
443 checkval = val->value != ULLONG_MAX;
444 if (!checkval) {
445 if (!val->string)
446 goto out;
447 p = strchr(val->string, '\n');
448 if (p)
449 *p = '\0';
450 for (p = val->string; *p; p++)
451 if (!(isdigit(*p) || isspace(*p)))
452 break;
453 /* The following code extracts the string to match or the value
454 * and sets checkval appropriately
455 */
456 if (*p) {
457 rv = sscanf(val->string, "%32s", valstr);
458 } else {
459 rv = sscanf(val->string, "%llu", &val->value);
460 checkval = true;
461 }
462 if (!rv)
463 goto out;
464 }
465
466 for (i = 0; tbl[i].string; i++) {
467 /* Check for exact match */
468 if (checkval) {
469 if (val->value == tbl[i].value)
470 ret = &tbl[i];
471 } else {
472 if (!strcmp(valstr, "default") &&
473 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
474 ret = &tbl[i];
475
476 if (!strcmp(valstr, tbl[i].string))
477 ret = &tbl[i];
478 }
479 /* Found an exact match */
480 if (ret)
481 goto out;
482 }
483 /* Possible range match */
484 if (checkval && bond_opt_check_range(opt, val->value))
485 ret = val;
486out:
487 return ret;
488}
489
490/* Check opt's dependencies against bond mode and currently set options */
491static int bond_opt_check_deps(struct bonding *bond,
492 const struct bond_option *opt)
493{
494 struct bond_params *params = &bond->params;
495
496 if (test_bit(params->mode, &opt->unsuppmodes))
497 return -EACCES;
498 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
499 return -ENOTEMPTY;
500 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
501 return -EBUSY;
502
503 return 0;
504}
505
506static void bond_opt_dep_print(struct bonding *bond,
507 const struct bond_option *opt)
508{
509 const struct bond_opt_value *modeval;
510 struct bond_params *params;
511
512 params = &bond->params;
513 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
514 if (test_bit(params->mode, &opt->unsuppmodes))
515 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n",
516 bond->dev->name, opt->name,
517 modeval->string, modeval->value);
518}
519
520static void bond_opt_error_interpret(struct bonding *bond,
521 const struct bond_option *opt,
522 int error, const struct bond_opt_value *val)
523{
524 const struct bond_opt_value *minval, *maxval;
525 char *p;
526
527 switch (error) {
528 case -EINVAL:
529 if (val) {
530 if (val->string) {
531 /* sometimes RAWVAL opts may have new lines */
532 p = strchr(val->string, '\n');
533 if (p)
534 *p = '\0';
535 pr_err("%s: option %s: invalid value (%s)\n",
536 bond->dev->name, opt->name, val->string);
537 } else {
538 pr_err("%s: option %s: invalid value (%llu)\n",
539 bond->dev->name, opt->name, val->value);
540 }
541 }
542 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
543 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
544 if (!maxval)
545 break;
546 pr_err("%s: option %s: allowed values %llu - %llu\n",
547 bond->dev->name, opt->name, minval ? minval->value : 0,
548 maxval->value);
549 break;
550 case -EACCES:
551 bond_opt_dep_print(bond, opt);
552 break;
553 case -ENOTEMPTY:
554 pr_err("%s: option %s: unable to set because the bond device has slaves\n",
555 bond->dev->name, opt->name);
556 break;
557 case -EBUSY:
558 pr_err("%s: option %s: unable to set because the bond device is up\n",
559 bond->dev->name, opt->name);
560 break;
561 default:
562 break;
563 }
564}
565
566/**
567 * __bond_opt_set - set a bonding option
568 * @bond: target bond device
569 * @option: option to set
570 * @val: value to set it to
571 *
572 * This function is used to change the bond's option value, it can be
573 * used for both enabling/changing an option and for disabling it. RTNL lock
574 * must be obtained before calling this function.
575 */
576int __bond_opt_set(struct bonding *bond,
577 unsigned int option, struct bond_opt_value *val)
578{
579 const struct bond_opt_value *retval = NULL;
580 const struct bond_option *opt;
581 int ret = -ENOENT;
582
583 ASSERT_RTNL();
584
585 opt = bond_opt_get(option);
586 if (WARN_ON(!val) || WARN_ON(!opt))
587 goto out;
588 ret = bond_opt_check_deps(bond, opt);
589 if (ret)
590 goto out;
591 retval = bond_opt_parse(opt, val);
592 if (!retval) {
593 ret = -EINVAL;
594 goto out;
595 }
596 ret = opt->set(bond, retval);
597out:
598 if (ret)
599 bond_opt_error_interpret(bond, opt, ret, val);
600
601 return ret;
602}
603
604/**
605 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
606 * @bond: target bond device
607 * @option: option to set
608 * @buf: value to set it to
609 *
610 * This function tries to acquire RTNL without blocking and if successful
611 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
612 */
613int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
614{
615 struct bond_opt_value optval;
616 int ret;
617
618 if (!rtnl_trylock())
619 return restart_syscall();
620 bond_opt_initstr(&optval, buf);
621 ret = __bond_opt_set(bond, option, &optval);
622 rtnl_unlock();
623
624 return ret;
625}
626
627/**
628 * bond_opt_get - get a pointer to an option
629 * @option: option for which to return a pointer
630 *
631 * This function checks if option is valid and if so returns a pointer
632 * to its entry in the bond_opts[] option array.
633 */
634const struct bond_option *bond_opt_get(unsigned int option)
635{
636 if (!BOND_OPT_VALID(option))
637 return NULL;
638
639 return &bond_opts[option];
640}
641
642int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval)
643{
644 if (BOND_NO_USES_ARP(newval->value) && bond->params.arp_interval) {
645 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n",
646 bond->dev->name, newval->string);
647 /* disable arp monitoring */
648 bond->params.arp_interval = 0;
649 /* set miimon to default value */
650 bond->params.miimon = BOND_DEFAULT_MIIMON;
651 pr_info("%s: Setting MII monitoring interval to %d\n",
652 bond->dev->name, bond->params.miimon);
653 }
654
655 /* don't cache arp_validate between modes */
656 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
657 bond->params.mode = newval->value;
658
659 return 0;
660}
661
662static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
663 struct slave *slave)
664{
665 return USES_PRIMARY(bond->params.mode) && slave ? slave->dev : NULL;
666}
667
668struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
669{
670 struct slave *slave = rcu_dereference(bond->curr_active_slave);
671
672 return __bond_option_active_slave_get(bond, slave);
673}
674
675struct net_device *bond_option_active_slave_get(struct bonding *bond)
676{
677 return __bond_option_active_slave_get(bond, bond->curr_active_slave);
678}
679
680static int bond_option_active_slave_set(struct bonding *bond,
681 const struct bond_opt_value *newval)
682{
683 char ifname[IFNAMSIZ] = { 0, };
684 struct net_device *slave_dev;
685 int ret = 0;
686
687 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
688 if (!strlen(ifname) || newval->string[0] == '\n') {
689 slave_dev = NULL;
690 } else {
691 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
692 if (!slave_dev)
693 return -ENODEV;
694 }
695
696 if (slave_dev) {
697 if (!netif_is_bond_slave(slave_dev)) {
698 pr_err("Device %s is not bonding slave\n",
699 slave_dev->name);
700 return -EINVAL;
701 }
702
703 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
704 pr_err("%s: Device %s is not our slave\n",
705 bond->dev->name, slave_dev->name);
706 return -EINVAL;
707 }
708 }
709
710 block_netpoll_tx();
711 write_lock_bh(&bond->curr_slave_lock);
712
713 /* check to see if we are clearing active */
714 if (!slave_dev) {
715 pr_info("%s: Clearing current active slave\n", bond->dev->name);
716 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
717 bond_select_active_slave(bond);
718 } else {
719 struct slave *old_active = bond->curr_active_slave;
720 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
721
722 BUG_ON(!new_active);
723
724 if (new_active == old_active) {
725 /* do nothing */
726 pr_info("%s: %s is already the current active slave\n",
727 bond->dev->name, new_active->dev->name);
728 } else {
729 if (old_active && (new_active->link == BOND_LINK_UP) &&
730 IS_UP(new_active->dev)) {
731 pr_info("%s: Setting %s as active slave\n",
732 bond->dev->name, new_active->dev->name);
733 bond_change_active_slave(bond, new_active);
734 } else {
735 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down\n",
736 bond->dev->name, new_active->dev->name,
737 new_active->dev->name);
738 ret = -EINVAL;
739 }
740 }
741 }
742
743 write_unlock_bh(&bond->curr_slave_lock);
744 unblock_netpoll_tx();
745
746 return ret;
747}
748
749static int bond_option_miimon_set(struct bonding *bond,
750 const struct bond_opt_value *newval)
751{
752 pr_info("%s: Setting MII monitoring interval to %llu\n",
753 bond->dev->name, newval->value);
754 bond->params.miimon = newval->value;
755 if (bond->params.updelay)
756 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
757 bond->dev->name,
758 bond->params.updelay * bond->params.miimon);
759 if (bond->params.downdelay)
760 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
761 bond->dev->name,
762 bond->params.downdelay * bond->params.miimon);
763 if (newval->value && bond->params.arp_interval) {
764 pr_info("%s: MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n",
765 bond->dev->name);
766 bond->params.arp_interval = 0;
767 if (bond->params.arp_validate)
768 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
769 }
770 if (bond->dev->flags & IFF_UP) {
771 /* If the interface is up, we may need to fire off
772 * the MII timer. If the interface is down, the
773 * timer will get fired off when the open function
774 * is called.
775 */
776 if (!newval->value) {
777 cancel_delayed_work_sync(&bond->mii_work);
778 } else {
779 cancel_delayed_work_sync(&bond->arp_work);
780 queue_delayed_work(bond->wq, &bond->mii_work, 0);
781 }
782 }
783
784 return 0;
785}
786
787static int bond_option_updelay_set(struct bonding *bond,
788 const struct bond_opt_value *newval)
789{
790 int value = newval->value;
791
792 if (!bond->params.miimon) {
793 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n",
794 bond->dev->name);
795 return -EPERM;
796 }
797 if ((value % bond->params.miimon) != 0) {
798 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
799 bond->dev->name, value,
800 bond->params.miimon,
801 (value / bond->params.miimon) *
802 bond->params.miimon);
803 }
804 bond->params.updelay = value / bond->params.miimon;
805 pr_info("%s: Setting up delay to %d\n",
806 bond->dev->name, bond->params.updelay * bond->params.miimon);
807
808 return 0;
809}
810
811static int bond_option_downdelay_set(struct bonding *bond,
812 const struct bond_opt_value *newval)
813{
814 int value = newval->value;
815
816 if (!bond->params.miimon) {
817 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n",
818 bond->dev->name);
819 return -EPERM;
820 }
821 if ((value % bond->params.miimon) != 0) {
822 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
823 bond->dev->name, value,
824 bond->params.miimon,
825 (value / bond->params.miimon) *
826 bond->params.miimon);
827 }
828 bond->params.downdelay = value / bond->params.miimon;
829 pr_info("%s: Setting down delay to %d\n",
830 bond->dev->name, bond->params.downdelay * bond->params.miimon);
831
832 return 0;
833}
834
835static int bond_option_use_carrier_set(struct bonding *bond,
836 const struct bond_opt_value *newval)
837{
838 pr_info("%s: Setting use_carrier to %llu\n",
839 bond->dev->name, newval->value);
840 bond->params.use_carrier = newval->value;
841
842 return 0;
843}
844
845static int bond_option_arp_interval_set(struct bonding *bond,
846 const struct bond_opt_value *newval)
847{
848 pr_info("%s: Setting ARP monitoring interval to %llu\n",
849 bond->dev->name, newval->value);
850 bond->params.arp_interval = newval->value;
851 if (newval->value) {
852 if (bond->params.miimon) {
853 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring\n",
854 bond->dev->name, bond->dev->name);
855 bond->params.miimon = 0;
856 }
857 if (!bond->params.arp_targets[0])
858 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified\n",
859 bond->dev->name);
860 }
861 if (bond->dev->flags & IFF_UP) {
862 /* If the interface is up, we may need to fire off
863 * the ARP timer. If the interface is down, the
864 * timer will get fired off when the open function
865 * is called.
866 */
867 if (!newval->value) {
868 if (bond->params.arp_validate)
869 bond->recv_probe = NULL;
870 cancel_delayed_work_sync(&bond->arp_work);
871 } else {
872 /* arp_validate can be set only in active-backup mode */
873 bond->recv_probe = bond_arp_rcv;
874 cancel_delayed_work_sync(&bond->mii_work);
875 queue_delayed_work(bond->wq, &bond->arp_work, 0);
876 }
877 }
878
879 return 0;
880}
881
882static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
883 __be32 target,
884 unsigned long last_rx)
885{
886 __be32 *targets = bond->params.arp_targets;
887 struct list_head *iter;
888 struct slave *slave;
889
890 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
891 bond_for_each_slave(bond, slave, iter)
892 slave->target_last_arp_rx[slot] = last_rx;
893 targets[slot] = target;
894 }
895}
896
897static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
898{
899 __be32 *targets = bond->params.arp_targets;
900 int ind;
901
902 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
903 pr_err("%s: invalid ARP target %pI4 specified for addition\n",
904 bond->dev->name, &target);
905 return -EINVAL;
906 }
907
908 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
909 pr_err("%s: ARP target %pI4 is already present\n",
910 bond->dev->name, &target);
911 return -EINVAL;
912 }
913
914 ind = bond_get_targets_ip(targets, 0); /* first free slot */
915 if (ind == -1) {
916 pr_err("%s: ARP target table is full!\n", bond->dev->name);
917 return -EINVAL;
918 }
919
920 pr_info("%s: Adding ARP target %pI4\n", bond->dev->name, &target);
921
922 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
923
924 return 0;
925}
926
927static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
928{
929 int ret;
930
931 /* not to race with bond_arp_rcv */
932 write_lock_bh(&bond->lock);
933 ret = _bond_option_arp_ip_target_add(bond, target);
934 write_unlock_bh(&bond->lock);
935
936 return ret;
937}
938
939static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
940{
941 __be32 *targets = bond->params.arp_targets;
942 struct list_head *iter;
943 struct slave *slave;
944 unsigned long *targets_rx;
945 int ind, i;
946
947 if (IS_IP_TARGET_UNUSABLE_ADDRESS(target)) {
948 pr_err("%s: invalid ARP target %pI4 specified for removal\n",
949 bond->dev->name, &target);
950 return -EINVAL;
951 }
952
953 ind = bond_get_targets_ip(targets, target);
954 if (ind == -1) {
955 pr_err("%s: unable to remove nonexistent ARP target %pI4\n",
956 bond->dev->name, &target);
957 return -EINVAL;
958 }
959
960 if (ind == 0 && !targets[1] && bond->params.arp_interval)
961 pr_warn("%s: Removing last arp target with arp_interval on\n",
962 bond->dev->name);
963
964 pr_info("%s: Removing ARP target %pI4\n", bond->dev->name, &target);
965
966 /* not to race with bond_arp_rcv */
967 write_lock_bh(&bond->lock);
968
969 bond_for_each_slave(bond, slave, iter) {
970 targets_rx = slave->target_last_arp_rx;
971 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
972 targets_rx[i] = targets_rx[i+1];
973 targets_rx[i] = 0;
974 }
975 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
976 targets[i] = targets[i+1];
977 targets[i] = 0;
978
979 write_unlock_bh(&bond->lock);
980
981 return 0;
982}
983
984void bond_option_arp_ip_targets_clear(struct bonding *bond)
985{
986 int i;
987
988 /* not to race with bond_arp_rcv */
989 write_lock_bh(&bond->lock);
990 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
991 _bond_options_arp_ip_target_set(bond, i, 0, 0);
992 write_unlock_bh(&bond->lock);
993}
994
995static int bond_option_arp_ip_targets_set(struct bonding *bond,
996 const struct bond_opt_value *newval)
997{
998 int ret = -EPERM;
999 __be32 target;
1000
1001 if (newval->string) {
1002 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1003 pr_err("%s: invalid ARP target %pI4 specified\n",
1004 bond->dev->name, &target);
1005 return ret;
1006 }
1007 if (newval->string[0] == '+')
1008 ret = bond_option_arp_ip_target_add(bond, target);
1009 else if (newval->string[0] == '-')
1010 ret = bond_option_arp_ip_target_rem(bond, target);
1011 else
1012 pr_err("no command found in arp_ip_targets file for bond %s - use +<addr> or -<addr>\n",
1013 bond->dev->name);
1014 } else {
1015 target = newval->value;
1016 ret = bond_option_arp_ip_target_add(bond, target);
1017 }
1018
1019 return ret;
1020}
1021
1022static int bond_option_arp_validate_set(struct bonding *bond,
1023 const struct bond_opt_value *newval)
1024{
1025 pr_info("%s: Setting arp_validate to %s (%llu)\n",
1026 bond->dev->name, newval->string, newval->value);
1027
1028 if (bond->dev->flags & IFF_UP) {
1029 if (!newval->value)
1030 bond->recv_probe = NULL;
1031 else if (bond->params.arp_interval)
1032 bond->recv_probe = bond_arp_rcv;
1033 }
1034 bond->params.arp_validate = newval->value;
1035
1036 return 0;
1037}
1038
1039static int bond_option_arp_all_targets_set(struct bonding *bond,
1040 const struct bond_opt_value *newval)
1041{
1042 pr_info("%s: Setting arp_all_targets to %s (%llu)\n",
1043 bond->dev->name, newval->string, newval->value);
1044 bond->params.arp_all_targets = newval->value;
1045
1046 return 0;
1047}
1048
1049static int bond_option_primary_set(struct bonding *bond,
1050 const struct bond_opt_value *newval)
1051{
1052 char *p, *primary = newval->string;
1053 struct list_head *iter;
1054 struct slave *slave;
1055
1056 block_netpoll_tx();
1057 read_lock(&bond->lock);
1058 write_lock_bh(&bond->curr_slave_lock);
1059
1060 p = strchr(primary, '\n');
1061 if (p)
1062 *p = '\0';
1063 /* check to see if we are clearing primary */
1064 if (!strlen(primary)) {
1065 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1066 bond->primary_slave = NULL;
1067 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1068 bond_select_active_slave(bond);
1069 goto out;
1070 }
1071
1072 bond_for_each_slave(bond, slave, iter) {
1073 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1074 pr_info("%s: Setting %s as primary slave\n",
1075 bond->dev->name, slave->dev->name);
1076 bond->primary_slave = slave;
1077 strcpy(bond->params.primary, slave->dev->name);
1078 bond_select_active_slave(bond);
1079 goto out;
1080 }
1081 }
1082
1083 if (bond->primary_slave) {
1084 pr_info("%s: Setting primary slave to None\n", bond->dev->name);
1085 bond->primary_slave = NULL;
1086 bond_select_active_slave(bond);
1087 }
1088 strncpy(bond->params.primary, primary, IFNAMSIZ);
1089 bond->params.primary[IFNAMSIZ - 1] = 0;
1090
1091 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet\n",
1092 bond->dev->name, primary, bond->dev->name);
1093
1094out:
1095 write_unlock_bh(&bond->curr_slave_lock);
1096 read_unlock(&bond->lock);
1097 unblock_netpoll_tx();
1098
1099 return 0;
1100}
1101
1102static int bond_option_primary_reselect_set(struct bonding *bond,
1103 const struct bond_opt_value *newval)
1104{
1105 pr_info("%s: Setting primary_reselect to %s (%llu)\n",
1106 bond->dev->name, newval->string, newval->value);
1107 bond->params.primary_reselect = newval->value;
1108
1109 block_netpoll_tx();
1110 write_lock_bh(&bond->curr_slave_lock);
1111 bond_select_active_slave(bond);
1112 write_unlock_bh(&bond->curr_slave_lock);
1113 unblock_netpoll_tx();
1114
1115 return 0;
1116}
1117
1118static int bond_option_fail_over_mac_set(struct bonding *bond,
1119 const struct bond_opt_value *newval)
1120{
1121 pr_info("%s: Setting fail_over_mac to %s (%llu)\n",
1122 bond->dev->name, newval->string, newval->value);
1123 bond->params.fail_over_mac = newval->value;
1124
1125 return 0;
1126}
1127
1128static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1129 const struct bond_opt_value *newval)
1130{
1131 pr_info("%s: Setting xmit hash policy to %s (%llu)\n",
1132 bond->dev->name, newval->string, newval->value);
1133 bond->params.xmit_policy = newval->value;
1134
1135 return 0;
1136}
1137
1138static int bond_option_resend_igmp_set(struct bonding *bond,
1139 const struct bond_opt_value *newval)
1140{
1141 pr_info("%s: Setting resend_igmp to %llu\n",
1142 bond->dev->name, newval->value);
1143 bond->params.resend_igmp = newval->value;
1144
1145 return 0;
1146}
1147
1148static int bond_option_num_peer_notif_set(struct bonding *bond,
1149 const struct bond_opt_value *newval)
1150{
1151 bond->params.num_peer_notif = newval->value;
1152
1153 return 0;
1154}
1155
1156static int bond_option_all_slaves_active_set(struct bonding *bond,
1157 const struct bond_opt_value *newval)
1158{
1159 struct list_head *iter;
1160 struct slave *slave;
1161
1162 if (newval->value == bond->params.all_slaves_active)
1163 return 0;
1164 bond->params.all_slaves_active = newval->value;
1165 bond_for_each_slave(bond, slave, iter) {
1166 if (!bond_is_active_slave(slave)) {
1167 if (newval->value)
1168 slave->inactive = 0;
1169 else
1170 slave->inactive = 1;
1171 }
1172 }
1173
1174 return 0;
1175}
1176
1177static int bond_option_min_links_set(struct bonding *bond,
1178 const struct bond_opt_value *newval)
1179{
1180 pr_info("%s: Setting min links value to %llu\n",
1181 bond->dev->name, newval->value);
1182 bond->params.min_links = newval->value;
1183
1184 return 0;
1185}
1186
1187static int bond_option_lp_interval_set(struct bonding *bond,
1188 const struct bond_opt_value *newval)
1189{
1190 bond->params.lp_interval = newval->value;
1191
1192 return 0;
1193}
1194
1195static int bond_option_pps_set(struct bonding *bond,
1196 const struct bond_opt_value *newval)
1197{
1198 bond->params.packets_per_slave = newval->value;
1199 if (newval->value > 0) {
1200 bond->params.reciprocal_packets_per_slave =
1201 reciprocal_value(newval->value);
1202 } else {
1203 /* reciprocal_packets_per_slave is unused if
1204 * packets_per_slave is 0 or 1, just initialize it
1205 */
1206 bond->params.reciprocal_packets_per_slave =
1207 (struct reciprocal_value) { 0 };
1208 }
1209
1210 return 0;
1211}
1212
1213static int bond_option_lacp_rate_set(struct bonding *bond,
1214 const struct bond_opt_value *newval)
1215{
1216 pr_info("%s: Setting LACP rate to %s (%llu)\n",
1217 bond->dev->name, newval->string, newval->value);
1218 bond->params.lacp_fast = newval->value;
1219 bond_3ad_update_lacp_rate(bond);
1220
1221 return 0;
1222}
1223
1224static int bond_option_ad_select_set(struct bonding *bond,
1225 const struct bond_opt_value *newval)
1226{
1227 pr_info("%s: Setting ad_select to %s (%llu)\n",
1228 bond->dev->name, newval->string, newval->value);
1229 bond->params.ad_select = newval->value;
1230
1231 return 0;
1232}
1233
1234static int bond_option_queue_id_set(struct bonding *bond,
1235 const struct bond_opt_value *newval)
1236{
1237 struct slave *slave, *update_slave;
1238 struct net_device *sdev;
1239 struct list_head *iter;
1240 char *delim;
1241 int ret = 0;
1242 u16 qid;
1243
1244 /* delim will point to queue id if successful */
1245 delim = strchr(newval->string, ':');
1246 if (!delim)
1247 goto err_no_cmd;
1248
1249 /* Terminate string that points to device name and bump it
1250 * up one, so we can read the queue id there.
1251 */
1252 *delim = '\0';
1253 if (sscanf(++delim, "%hd\n", &qid) != 1)
1254 goto err_no_cmd;
1255
1256 /* Check buffer length, valid ifname and queue id */
1257 if (!dev_valid_name(newval->string) ||
1258 qid > bond->dev->real_num_tx_queues)
1259 goto err_no_cmd;
1260
1261 /* Get the pointer to that interface if it exists */
1262 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1263 if (!sdev)
1264 goto err_no_cmd;
1265
1266 /* Search for thes slave and check for duplicate qids */
1267 update_slave = NULL;
1268 bond_for_each_slave(bond, slave, iter) {
1269 if (sdev == slave->dev)
1270 /* We don't need to check the matching
1271 * slave for dups, since we're overwriting it
1272 */
1273 update_slave = slave;
1274 else if (qid && qid == slave->queue_id) {
1275 goto err_no_cmd;
1276 }
1277 }
1278
1279 if (!update_slave)
1280 goto err_no_cmd;
1281
1282 /* Actually set the qids for the slave */
1283 update_slave->queue_id = qid;
1284
1285out:
1286 return ret;
1287
1288err_no_cmd:
1289 pr_info("invalid input for queue_id set for %s\n", bond->dev->name);
1290 ret = -EPERM;
1291 goto out;
1292
1293}
1294
1295static int bond_option_slaves_set(struct bonding *bond,
1296 const struct bond_opt_value *newval)
1297{
1298 char command[IFNAMSIZ + 1] = { 0, };
1299 struct net_device *dev;
1300 char *ifname;
1301 int ret;
1302
1303 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1304 ifname = command + 1;
1305 if ((strlen(command) <= 1) ||
1306 !dev_valid_name(ifname))
1307 goto err_no_cmd;
1308
1309 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1310 if (!dev) {
1311 pr_info("%s: interface %s does not exist!\n",
1312 bond->dev->name, ifname);
1313 ret = -ENODEV;
1314 goto out;
1315 }
1316
1317 switch (command[0]) {
1318 case '+':
1319 pr_info("%s: Adding slave %s\n", bond->dev->name, dev->name);
1320 ret = bond_enslave(bond->dev, dev);
1321 break;
1322
1323 case '-':
1324 pr_info("%s: Removing slave %s\n", bond->dev->name, dev->name);
1325 ret = bond_release(bond->dev, dev);
1326 break;
1327
1328 default:
1329 goto err_no_cmd;
1330 }
1331
1332out:
1333 return ret;
1334
1335err_no_cmd:
1336 pr_err("no command found in slaves file for bond %s - use +ifname or -ifname\n",
1337 bond->dev->name);
1338 ret = -EPERM;
1339 goto out;
1340}
1/*
2 * drivers/net/bond/bond_options.c - bonding options
3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
4 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
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#include <linux/errno.h>
13#include <linux/if.h>
14#include <linux/netdevice.h>
15#include <linux/spinlock.h>
16#include <linux/rcupdate.h>
17#include <linux/ctype.h>
18#include <linux/inet.h>
19#include <linux/sched/signal.h>
20
21#include <net/bonding.h>
22
23static int bond_option_active_slave_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25static int bond_option_miimon_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27static int bond_option_updelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29static int bond_option_downdelay_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31static int bond_option_use_carrier_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33static int bond_option_arp_interval_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
36static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
37static int bond_option_arp_ip_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39static int bond_option_arp_validate_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41static int bond_option_arp_all_targets_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43static int bond_option_primary_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45static int bond_option_primary_reselect_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47static int bond_option_fail_over_mac_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49static int bond_option_xmit_hash_policy_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51static int bond_option_resend_igmp_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53static int bond_option_num_peer_notif_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55static int bond_option_all_slaves_active_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57static int bond_option_min_links_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59static int bond_option_lp_interval_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61static int bond_option_pps_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63static int bond_option_lacp_rate_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65static int bond_option_ad_select_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67static int bond_option_queue_id_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69static int bond_option_mode_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71static int bond_option_slaves_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77static int bond_option_ad_actor_system_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79static int bond_option_ad_user_port_key_set(struct bonding *bond,
80 const struct bond_opt_value *newval);
81
82
83static const struct bond_opt_value bond_mode_tbl[] = {
84 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
85 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
86 { "balance-xor", BOND_MODE_XOR, 0},
87 { "broadcast", BOND_MODE_BROADCAST, 0},
88 { "802.3ad", BOND_MODE_8023AD, 0},
89 { "balance-tlb", BOND_MODE_TLB, 0},
90 { "balance-alb", BOND_MODE_ALB, 0},
91 { NULL, -1, 0},
92};
93
94static const struct bond_opt_value bond_pps_tbl[] = {
95 { "default", 1, BOND_VALFLAG_DEFAULT},
96 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
97 { NULL, -1, 0},
98};
99
100static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
101 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
102 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
103 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
104 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
105 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
106 { NULL, -1, 0},
107};
108
109static const struct bond_opt_value bond_arp_validate_tbl[] = {
110 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
111 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
112 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
113 { "all", BOND_ARP_VALIDATE_ALL, 0},
114 { "filter", BOND_ARP_FILTER, 0},
115 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
116 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
117 { NULL, -1, 0},
118};
119
120static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
121 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
122 { "all", BOND_ARP_TARGETS_ALL, 0},
123 { NULL, -1, 0},
124};
125
126static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
127 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
128 { "active", BOND_FOM_ACTIVE, 0},
129 { "follow", BOND_FOM_FOLLOW, 0},
130 { NULL, -1, 0},
131};
132
133static const struct bond_opt_value bond_intmax_tbl[] = {
134 { "off", 0, BOND_VALFLAG_DEFAULT},
135 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
136 { NULL, -1, 0}
137};
138
139static const struct bond_opt_value bond_lacp_rate_tbl[] = {
140 { "slow", AD_LACP_SLOW, 0},
141 { "fast", AD_LACP_FAST, 0},
142 { NULL, -1, 0},
143};
144
145static const struct bond_opt_value bond_ad_select_tbl[] = {
146 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
147 { "bandwidth", BOND_AD_BANDWIDTH, 0},
148 { "count", BOND_AD_COUNT, 0},
149 { NULL, -1, 0},
150};
151
152static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
153 { "off", 0, 0},
154 { "maxval", 255, BOND_VALFLAG_MAX},
155 { "default", 1, BOND_VALFLAG_DEFAULT},
156 { NULL, -1, 0}
157};
158
159static const struct bond_opt_value bond_primary_reselect_tbl[] = {
160 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
161 { "better", BOND_PRI_RESELECT_BETTER, 0},
162 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
163 { NULL, -1},
164};
165
166static const struct bond_opt_value bond_use_carrier_tbl[] = {
167 { "off", 0, 0},
168 { "on", 1, BOND_VALFLAG_DEFAULT},
169 { NULL, -1, 0}
170};
171
172static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
173 { "off", 0, BOND_VALFLAG_DEFAULT},
174 { "on", 1, 0},
175 { NULL, -1, 0}
176};
177
178static const struct bond_opt_value bond_resend_igmp_tbl[] = {
179 { "off", 0, 0},
180 { "maxval", 255, BOND_VALFLAG_MAX},
181 { "default", 1, BOND_VALFLAG_DEFAULT},
182 { NULL, -1, 0}
183};
184
185static const struct bond_opt_value bond_lp_interval_tbl[] = {
186 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
187 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
188 { NULL, -1, 0},
189};
190
191static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
192 { "off", 0, 0},
193 { "on", 1, BOND_VALFLAG_DEFAULT},
194 { NULL, -1, 0}
195};
196
197static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
198 { "minval", 1, BOND_VALFLAG_MIN},
199 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
200 { NULL, -1, 0},
201};
202
203static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
204 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
205 { "maxval", 1023, BOND_VALFLAG_MAX},
206 { NULL, -1, 0},
207};
208
209static const struct bond_option bond_opts[BOND_OPT_LAST] = {
210 [BOND_OPT_MODE] = {
211 .id = BOND_OPT_MODE,
212 .name = "mode",
213 .desc = "bond device mode",
214 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
215 .values = bond_mode_tbl,
216 .set = bond_option_mode_set
217 },
218 [BOND_OPT_PACKETS_PER_SLAVE] = {
219 .id = BOND_OPT_PACKETS_PER_SLAVE,
220 .name = "packets_per_slave",
221 .desc = "Packets to send per slave in RR mode",
222 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
223 .values = bond_pps_tbl,
224 .set = bond_option_pps_set
225 },
226 [BOND_OPT_XMIT_HASH] = {
227 .id = BOND_OPT_XMIT_HASH,
228 .name = "xmit_hash_policy",
229 .desc = "balance-xor, 802.3ad, and tlb hashing method",
230 .values = bond_xmit_hashtype_tbl,
231 .set = bond_option_xmit_hash_policy_set
232 },
233 [BOND_OPT_ARP_VALIDATE] = {
234 .id = BOND_OPT_ARP_VALIDATE,
235 .name = "arp_validate",
236 .desc = "validate src/dst of ARP probes",
237 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
238 BIT(BOND_MODE_ALB),
239 .values = bond_arp_validate_tbl,
240 .set = bond_option_arp_validate_set
241 },
242 [BOND_OPT_ARP_ALL_TARGETS] = {
243 .id = BOND_OPT_ARP_ALL_TARGETS,
244 .name = "arp_all_targets",
245 .desc = "fail on any/all arp targets timeout",
246 .values = bond_arp_all_targets_tbl,
247 .set = bond_option_arp_all_targets_set
248 },
249 [BOND_OPT_FAIL_OVER_MAC] = {
250 .id = BOND_OPT_FAIL_OVER_MAC,
251 .name = "fail_over_mac",
252 .desc = "For active-backup, do not set all slaves to the same MAC",
253 .flags = BOND_OPTFLAG_NOSLAVES,
254 .values = bond_fail_over_mac_tbl,
255 .set = bond_option_fail_over_mac_set
256 },
257 [BOND_OPT_ARP_INTERVAL] = {
258 .id = BOND_OPT_ARP_INTERVAL,
259 .name = "arp_interval",
260 .desc = "arp interval in milliseconds",
261 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
262 BIT(BOND_MODE_ALB),
263 .values = bond_intmax_tbl,
264 .set = bond_option_arp_interval_set
265 },
266 [BOND_OPT_ARP_TARGETS] = {
267 .id = BOND_OPT_ARP_TARGETS,
268 .name = "arp_ip_target",
269 .desc = "arp targets in n.n.n.n form",
270 .flags = BOND_OPTFLAG_RAWVAL,
271 .set = bond_option_arp_ip_targets_set
272 },
273 [BOND_OPT_DOWNDELAY] = {
274 .id = BOND_OPT_DOWNDELAY,
275 .name = "downdelay",
276 .desc = "Delay before considering link down, in milliseconds",
277 .values = bond_intmax_tbl,
278 .set = bond_option_downdelay_set
279 },
280 [BOND_OPT_UPDELAY] = {
281 .id = BOND_OPT_UPDELAY,
282 .name = "updelay",
283 .desc = "Delay before considering link up, in milliseconds",
284 .values = bond_intmax_tbl,
285 .set = bond_option_updelay_set
286 },
287 [BOND_OPT_LACP_RATE] = {
288 .id = BOND_OPT_LACP_RATE,
289 .name = "lacp_rate",
290 .desc = "LACPDU tx rate to request from 802.3ad partner",
291 .flags = BOND_OPTFLAG_IFDOWN,
292 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
293 .values = bond_lacp_rate_tbl,
294 .set = bond_option_lacp_rate_set
295 },
296 [BOND_OPT_MINLINKS] = {
297 .id = BOND_OPT_MINLINKS,
298 .name = "min_links",
299 .desc = "Minimum number of available links before turning on carrier",
300 .values = bond_intmax_tbl,
301 .set = bond_option_min_links_set
302 },
303 [BOND_OPT_AD_SELECT] = {
304 .id = BOND_OPT_AD_SELECT,
305 .name = "ad_select",
306 .desc = "803.ad aggregation selection logic",
307 .flags = BOND_OPTFLAG_IFDOWN,
308 .values = bond_ad_select_tbl,
309 .set = bond_option_ad_select_set
310 },
311 [BOND_OPT_NUM_PEER_NOTIF] = {
312 .id = BOND_OPT_NUM_PEER_NOTIF,
313 .name = "num_unsol_na",
314 .desc = "Number of peer notifications to send on failover event",
315 .values = bond_num_peer_notif_tbl,
316 .set = bond_option_num_peer_notif_set
317 },
318 [BOND_OPT_MIIMON] = {
319 .id = BOND_OPT_MIIMON,
320 .name = "miimon",
321 .desc = "Link check interval in milliseconds",
322 .values = bond_intmax_tbl,
323 .set = bond_option_miimon_set
324 },
325 [BOND_OPT_PRIMARY] = {
326 .id = BOND_OPT_PRIMARY,
327 .name = "primary",
328 .desc = "Primary network device to use",
329 .flags = BOND_OPTFLAG_RAWVAL,
330 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
331 BIT(BOND_MODE_TLB) |
332 BIT(BOND_MODE_ALB)),
333 .set = bond_option_primary_set
334 },
335 [BOND_OPT_PRIMARY_RESELECT] = {
336 .id = BOND_OPT_PRIMARY_RESELECT,
337 .name = "primary_reselect",
338 .desc = "Reselect primary slave once it comes up",
339 .values = bond_primary_reselect_tbl,
340 .set = bond_option_primary_reselect_set
341 },
342 [BOND_OPT_USE_CARRIER] = {
343 .id = BOND_OPT_USE_CARRIER,
344 .name = "use_carrier",
345 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
346 .values = bond_use_carrier_tbl,
347 .set = bond_option_use_carrier_set
348 },
349 [BOND_OPT_ACTIVE_SLAVE] = {
350 .id = BOND_OPT_ACTIVE_SLAVE,
351 .name = "active_slave",
352 .desc = "Currently active slave",
353 .flags = BOND_OPTFLAG_RAWVAL,
354 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
355 BIT(BOND_MODE_TLB) |
356 BIT(BOND_MODE_ALB)),
357 .set = bond_option_active_slave_set
358 },
359 [BOND_OPT_QUEUE_ID] = {
360 .id = BOND_OPT_QUEUE_ID,
361 .name = "queue_id",
362 .desc = "Set queue id of a slave",
363 .flags = BOND_OPTFLAG_RAWVAL,
364 .set = bond_option_queue_id_set
365 },
366 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
367 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
368 .name = "all_slaves_active",
369 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
370 .values = bond_all_slaves_active_tbl,
371 .set = bond_option_all_slaves_active_set
372 },
373 [BOND_OPT_RESEND_IGMP] = {
374 .id = BOND_OPT_RESEND_IGMP,
375 .name = "resend_igmp",
376 .desc = "Number of IGMP membership reports to send on link failure",
377 .values = bond_resend_igmp_tbl,
378 .set = bond_option_resend_igmp_set
379 },
380 [BOND_OPT_LP_INTERVAL] = {
381 .id = BOND_OPT_LP_INTERVAL,
382 .name = "lp_interval",
383 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
384 .values = bond_lp_interval_tbl,
385 .set = bond_option_lp_interval_set
386 },
387 [BOND_OPT_SLAVES] = {
388 .id = BOND_OPT_SLAVES,
389 .name = "slaves",
390 .desc = "Slave membership management",
391 .flags = BOND_OPTFLAG_RAWVAL,
392 .set = bond_option_slaves_set
393 },
394 [BOND_OPT_TLB_DYNAMIC_LB] = {
395 .id = BOND_OPT_TLB_DYNAMIC_LB,
396 .name = "tlb_dynamic_lb",
397 .desc = "Enable dynamic flow shuffling",
398 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
399 .values = bond_tlb_dynamic_lb_tbl,
400 .flags = BOND_OPTFLAG_IFDOWN,
401 .set = bond_option_tlb_dynamic_lb_set,
402 },
403 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
404 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
405 .name = "ad_actor_sys_prio",
406 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
407 .values = bond_ad_actor_sys_prio_tbl,
408 .set = bond_option_ad_actor_sys_prio_set,
409 },
410 [BOND_OPT_AD_ACTOR_SYSTEM] = {
411 .id = BOND_OPT_AD_ACTOR_SYSTEM,
412 .name = "ad_actor_system",
413 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
414 .flags = BOND_OPTFLAG_RAWVAL,
415 .set = bond_option_ad_actor_system_set,
416 },
417 [BOND_OPT_AD_USER_PORT_KEY] = {
418 .id = BOND_OPT_AD_USER_PORT_KEY,
419 .name = "ad_user_port_key",
420 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
421 .flags = BOND_OPTFLAG_IFDOWN,
422 .values = bond_ad_user_port_key_tbl,
423 .set = bond_option_ad_user_port_key_set,
424 },
425 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
426 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
427 .name = "num_grat_arp",
428 .desc = "Number of peer notifications to send on failover event",
429 .values = bond_num_peer_notif_tbl,
430 .set = bond_option_num_peer_notif_set
431 }
432};
433
434/* Searches for an option by name */
435const struct bond_option *bond_opt_get_by_name(const char *name)
436{
437 const struct bond_option *opt;
438 int option;
439
440 for (option = 0; option < BOND_OPT_LAST; option++) {
441 opt = bond_opt_get(option);
442 if (opt && !strcmp(opt->name, name))
443 return opt;
444 }
445
446 return NULL;
447}
448
449/* Searches for a value in opt's values[] table */
450const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
451{
452 const struct bond_option *opt;
453 int i;
454
455 opt = bond_opt_get(option);
456 if (WARN_ON(!opt))
457 return NULL;
458 for (i = 0; opt->values && opt->values[i].string; i++)
459 if (opt->values[i].value == val)
460 return &opt->values[i];
461
462 return NULL;
463}
464
465/* Searches for a value in opt's values[] table which matches the flagmask */
466static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
467 u32 flagmask)
468{
469 int i;
470
471 for (i = 0; opt->values && opt->values[i].string; i++)
472 if (opt->values[i].flags & flagmask)
473 return &opt->values[i];
474
475 return NULL;
476}
477
478/* If maxval is missing then there's no range to check. In case minval is
479 * missing then it's considered to be 0.
480 */
481static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
482{
483 const struct bond_opt_value *minval, *maxval;
484
485 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
486 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
487 if (!maxval || (minval && val < minval->value) || val > maxval->value)
488 return false;
489
490 return true;
491}
492
493/**
494 * bond_opt_parse - parse option value
495 * @opt: the option to parse against
496 * @val: value to parse
497 *
498 * This function tries to extract the value from @val and check if it's
499 * a possible match for the option and returns NULL if a match isn't found,
500 * or the struct_opt_value that matched. It also strips the new line from
501 * @val->string if it's present.
502 */
503const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
504 struct bond_opt_value *val)
505{
506 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
507 const struct bond_opt_value *tbl;
508 const struct bond_opt_value *ret = NULL;
509 bool checkval;
510 int i, rv;
511
512 /* No parsing if the option wants a raw val */
513 if (opt->flags & BOND_OPTFLAG_RAWVAL)
514 return val;
515
516 tbl = opt->values;
517 if (!tbl)
518 goto out;
519
520 /* ULLONG_MAX is used to bypass string processing */
521 checkval = val->value != ULLONG_MAX;
522 if (!checkval) {
523 if (!val->string)
524 goto out;
525 p = strchr(val->string, '\n');
526 if (p)
527 *p = '\0';
528 for (p = val->string; *p; p++)
529 if (!(isdigit(*p) || isspace(*p)))
530 break;
531 /* The following code extracts the string to match or the value
532 * and sets checkval appropriately
533 */
534 if (*p) {
535 rv = sscanf(val->string, "%32s", valstr);
536 } else {
537 rv = sscanf(val->string, "%llu", &val->value);
538 checkval = true;
539 }
540 if (!rv)
541 goto out;
542 }
543
544 for (i = 0; tbl[i].string; i++) {
545 /* Check for exact match */
546 if (checkval) {
547 if (val->value == tbl[i].value)
548 ret = &tbl[i];
549 } else {
550 if (!strcmp(valstr, "default") &&
551 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
552 ret = &tbl[i];
553
554 if (!strcmp(valstr, tbl[i].string))
555 ret = &tbl[i];
556 }
557 /* Found an exact match */
558 if (ret)
559 goto out;
560 }
561 /* Possible range match */
562 if (checkval && bond_opt_check_range(opt, val->value))
563 ret = val;
564out:
565 return ret;
566}
567
568/* Check opt's dependencies against bond mode and currently set options */
569static int bond_opt_check_deps(struct bonding *bond,
570 const struct bond_option *opt)
571{
572 struct bond_params *params = &bond->params;
573
574 if (test_bit(params->mode, &opt->unsuppmodes))
575 return -EACCES;
576 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
577 return -ENOTEMPTY;
578 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
579 return -EBUSY;
580
581 return 0;
582}
583
584static void bond_opt_dep_print(struct bonding *bond,
585 const struct bond_option *opt)
586{
587 const struct bond_opt_value *modeval;
588 struct bond_params *params;
589
590 params = &bond->params;
591 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
592 if (test_bit(params->mode, &opt->unsuppmodes))
593 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
594 opt->name, modeval->string, modeval->value);
595}
596
597static void bond_opt_error_interpret(struct bonding *bond,
598 const struct bond_option *opt,
599 int error, const struct bond_opt_value *val)
600{
601 const struct bond_opt_value *minval, *maxval;
602 char *p;
603
604 switch (error) {
605 case -EINVAL:
606 if (val) {
607 if (val->string) {
608 /* sometimes RAWVAL opts may have new lines */
609 p = strchr(val->string, '\n');
610 if (p)
611 *p = '\0';
612 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
613 opt->name, val->string);
614 } else {
615 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
616 opt->name, val->value);
617 }
618 }
619 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
620 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
621 if (!maxval)
622 break;
623 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
624 opt->name, minval ? minval->value : 0, maxval->value);
625 break;
626 case -EACCES:
627 bond_opt_dep_print(bond, opt);
628 break;
629 case -ENOTEMPTY:
630 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
631 opt->name);
632 break;
633 case -EBUSY:
634 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
635 opt->name);
636 break;
637 default:
638 break;
639 }
640}
641
642/**
643 * __bond_opt_set - set a bonding option
644 * @bond: target bond device
645 * @option: option to set
646 * @val: value to set it to
647 *
648 * This function is used to change the bond's option value, it can be
649 * used for both enabling/changing an option and for disabling it. RTNL lock
650 * must be obtained before calling this function.
651 */
652int __bond_opt_set(struct bonding *bond,
653 unsigned int option, struct bond_opt_value *val)
654{
655 const struct bond_opt_value *retval = NULL;
656 const struct bond_option *opt;
657 int ret = -ENOENT;
658
659 ASSERT_RTNL();
660
661 opt = bond_opt_get(option);
662 if (WARN_ON(!val) || WARN_ON(!opt))
663 goto out;
664 ret = bond_opt_check_deps(bond, opt);
665 if (ret)
666 goto out;
667 retval = bond_opt_parse(opt, val);
668 if (!retval) {
669 ret = -EINVAL;
670 goto out;
671 }
672 ret = opt->set(bond, retval);
673out:
674 if (ret)
675 bond_opt_error_interpret(bond, opt, ret, val);
676
677 return ret;
678}
679/**
680 * __bond_opt_set_notify - set a bonding option
681 * @bond: target bond device
682 * @option: option to set
683 * @val: value to set it to
684 *
685 * This function is used to change the bond's option value and trigger
686 * a notification to user sapce. It can be used for both enabling/changing
687 * an option and for disabling it. RTNL lock must be obtained before calling
688 * this function.
689 */
690int __bond_opt_set_notify(struct bonding *bond,
691 unsigned int option, struct bond_opt_value *val)
692{
693 int ret = -ENOENT;
694
695 ASSERT_RTNL();
696
697 ret = __bond_opt_set(bond, option, val);
698
699 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
700 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
701
702 return ret;
703}
704
705/**
706 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
707 * @bond: target bond device
708 * @option: option to set
709 * @buf: value to set it to
710 *
711 * This function tries to acquire RTNL without blocking and if successful
712 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
713 */
714int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
715{
716 struct bond_opt_value optval;
717 int ret;
718
719 if (!rtnl_trylock())
720 return restart_syscall();
721 bond_opt_initstr(&optval, buf);
722 ret = __bond_opt_set_notify(bond, option, &optval);
723 rtnl_unlock();
724
725 return ret;
726}
727
728/**
729 * bond_opt_get - get a pointer to an option
730 * @option: option for which to return a pointer
731 *
732 * This function checks if option is valid and if so returns a pointer
733 * to its entry in the bond_opts[] option array.
734 */
735const struct bond_option *bond_opt_get(unsigned int option)
736{
737 if (!BOND_OPT_VALID(option))
738 return NULL;
739
740 return &bond_opts[option];
741}
742
743static int bond_option_mode_set(struct bonding *bond,
744 const struct bond_opt_value *newval)
745{
746 if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
747 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
748 newval->string);
749 /* disable arp monitoring */
750 bond->params.arp_interval = 0;
751 /* set miimon to default value */
752 bond->params.miimon = BOND_DEFAULT_MIIMON;
753 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
754 bond->params.miimon);
755 }
756
757 if (newval->value == BOND_MODE_ALB)
758 bond->params.tlb_dynamic_lb = 1;
759
760 /* don't cache arp_validate between modes */
761 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
762 bond->params.mode = newval->value;
763
764 return 0;
765}
766
767static int bond_option_active_slave_set(struct bonding *bond,
768 const struct bond_opt_value *newval)
769{
770 char ifname[IFNAMSIZ] = { 0, };
771 struct net_device *slave_dev;
772 int ret = 0;
773
774 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
775 if (!strlen(ifname) || newval->string[0] == '\n') {
776 slave_dev = NULL;
777 } else {
778 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
779 if (!slave_dev)
780 return -ENODEV;
781 }
782
783 if (slave_dev) {
784 if (!netif_is_bond_slave(slave_dev)) {
785 netdev_err(bond->dev, "Device %s is not bonding slave\n",
786 slave_dev->name);
787 return -EINVAL;
788 }
789
790 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
791 netdev_err(bond->dev, "Device %s is not our slave\n",
792 slave_dev->name);
793 return -EINVAL;
794 }
795 }
796
797 block_netpoll_tx();
798 /* check to see if we are clearing active */
799 if (!slave_dev) {
800 netdev_dbg(bond->dev, "Clearing current active slave\n");
801 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
802 bond_select_active_slave(bond);
803 } else {
804 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
805 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
806
807 BUG_ON(!new_active);
808
809 if (new_active == old_active) {
810 /* do nothing */
811 netdev_dbg(bond->dev, "%s is already the current active slave\n",
812 new_active->dev->name);
813 } else {
814 if (old_active && (new_active->link == BOND_LINK_UP) &&
815 bond_slave_is_up(new_active)) {
816 netdev_dbg(bond->dev, "Setting %s as active slave\n",
817 new_active->dev->name);
818 bond_change_active_slave(bond, new_active);
819 } else {
820 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
821 new_active->dev->name,
822 new_active->dev->name);
823 ret = -EINVAL;
824 }
825 }
826 }
827 unblock_netpoll_tx();
828
829 return ret;
830}
831
832/* There are two tricky bits here. First, if MII monitoring is activated, then
833 * we must disable ARP monitoring. Second, if the timer isn't running, we must
834 * start it.
835 */
836static int bond_option_miimon_set(struct bonding *bond,
837 const struct bond_opt_value *newval)
838{
839 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
840 newval->value);
841 bond->params.miimon = newval->value;
842 if (bond->params.updelay)
843 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
844 bond->params.updelay * bond->params.miimon);
845 if (bond->params.downdelay)
846 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
847 bond->params.downdelay * bond->params.miimon);
848 if (newval->value && bond->params.arp_interval) {
849 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
850 bond->params.arp_interval = 0;
851 if (bond->params.arp_validate)
852 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
853 }
854 if (bond->dev->flags & IFF_UP) {
855 /* If the interface is up, we may need to fire off
856 * the MII timer. If the interface is down, the
857 * timer will get fired off when the open function
858 * is called.
859 */
860 if (!newval->value) {
861 cancel_delayed_work_sync(&bond->mii_work);
862 } else {
863 cancel_delayed_work_sync(&bond->arp_work);
864 queue_delayed_work(bond->wq, &bond->mii_work, 0);
865 }
866 }
867
868 return 0;
869}
870
871/* Set up and down delays. These must be multiples of the
872 * MII monitoring value, and are stored internally as the multiplier.
873 * Thus, we must translate to MS for the real world.
874 */
875static int bond_option_updelay_set(struct bonding *bond,
876 const struct bond_opt_value *newval)
877{
878 int value = newval->value;
879
880 if (!bond->params.miimon) {
881 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
882 return -EPERM;
883 }
884 if ((value % bond->params.miimon) != 0) {
885 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
886 value, bond->params.miimon,
887 (value / bond->params.miimon) *
888 bond->params.miimon);
889 }
890 bond->params.updelay = value / bond->params.miimon;
891 netdev_dbg(bond->dev, "Setting up delay to %d\n",
892 bond->params.updelay * bond->params.miimon);
893
894 return 0;
895}
896
897static int bond_option_downdelay_set(struct bonding *bond,
898 const struct bond_opt_value *newval)
899{
900 int value = newval->value;
901
902 if (!bond->params.miimon) {
903 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
904 return -EPERM;
905 }
906 if ((value % bond->params.miimon) != 0) {
907 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
908 value, bond->params.miimon,
909 (value / bond->params.miimon) *
910 bond->params.miimon);
911 }
912 bond->params.downdelay = value / bond->params.miimon;
913 netdev_dbg(bond->dev, "Setting down delay to %d\n",
914 bond->params.downdelay * bond->params.miimon);
915
916 return 0;
917}
918
919static int bond_option_use_carrier_set(struct bonding *bond,
920 const struct bond_opt_value *newval)
921{
922 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
923 newval->value);
924 bond->params.use_carrier = newval->value;
925
926 return 0;
927}
928
929/* There are two tricky bits here. First, if ARP monitoring is activated, then
930 * we must disable MII monitoring. Second, if the ARP timer isn't running,
931 * we must start it.
932 */
933static int bond_option_arp_interval_set(struct bonding *bond,
934 const struct bond_opt_value *newval)
935{
936 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
937 newval->value);
938 bond->params.arp_interval = newval->value;
939 if (newval->value) {
940 if (bond->params.miimon) {
941 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
942 bond->params.miimon = 0;
943 }
944 if (!bond->params.arp_targets[0])
945 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
946 }
947 if (bond->dev->flags & IFF_UP) {
948 /* If the interface is up, we may need to fire off
949 * the ARP timer. If the interface is down, the
950 * timer will get fired off when the open function
951 * is called.
952 */
953 if (!newval->value) {
954 if (bond->params.arp_validate)
955 bond->recv_probe = NULL;
956 cancel_delayed_work_sync(&bond->arp_work);
957 } else {
958 /* arp_validate can be set only in active-backup mode */
959 bond->recv_probe = bond_arp_rcv;
960 cancel_delayed_work_sync(&bond->mii_work);
961 queue_delayed_work(bond->wq, &bond->arp_work, 0);
962 }
963 }
964
965 return 0;
966}
967
968static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
969 __be32 target,
970 unsigned long last_rx)
971{
972 __be32 *targets = bond->params.arp_targets;
973 struct list_head *iter;
974 struct slave *slave;
975
976 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
977 bond_for_each_slave(bond, slave, iter)
978 slave->target_last_arp_rx[slot] = last_rx;
979 targets[slot] = target;
980 }
981}
982
983static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
984{
985 __be32 *targets = bond->params.arp_targets;
986 int ind;
987
988 if (!bond_is_ip_target_ok(target)) {
989 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
990 &target);
991 return -EINVAL;
992 }
993
994 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
995 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
996 &target);
997 return -EINVAL;
998 }
999
1000 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1001 if (ind == -1) {
1002 netdev_err(bond->dev, "ARP target table is full!\n");
1003 return -EINVAL;
1004 }
1005
1006 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1007
1008 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1009
1010 return 0;
1011}
1012
1013static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1014{
1015 return _bond_option_arp_ip_target_add(bond, target);
1016}
1017
1018static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1019{
1020 __be32 *targets = bond->params.arp_targets;
1021 struct list_head *iter;
1022 struct slave *slave;
1023 unsigned long *targets_rx;
1024 int ind, i;
1025
1026 if (!bond_is_ip_target_ok(target)) {
1027 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1028 &target);
1029 return -EINVAL;
1030 }
1031
1032 ind = bond_get_targets_ip(targets, target);
1033 if (ind == -1) {
1034 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1035 &target);
1036 return -EINVAL;
1037 }
1038
1039 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1040 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1041
1042 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1043
1044 bond_for_each_slave(bond, slave, iter) {
1045 targets_rx = slave->target_last_arp_rx;
1046 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1047 targets_rx[i] = targets_rx[i+1];
1048 targets_rx[i] = 0;
1049 }
1050 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1051 targets[i] = targets[i+1];
1052 targets[i] = 0;
1053
1054 return 0;
1055}
1056
1057void bond_option_arp_ip_targets_clear(struct bonding *bond)
1058{
1059 int i;
1060
1061 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1062 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1063}
1064
1065static int bond_option_arp_ip_targets_set(struct bonding *bond,
1066 const struct bond_opt_value *newval)
1067{
1068 int ret = -EPERM;
1069 __be32 target;
1070
1071 if (newval->string) {
1072 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1073 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1074 &target);
1075 return ret;
1076 }
1077 if (newval->string[0] == '+')
1078 ret = bond_option_arp_ip_target_add(bond, target);
1079 else if (newval->string[0] == '-')
1080 ret = bond_option_arp_ip_target_rem(bond, target);
1081 else
1082 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1083 } else {
1084 target = newval->value;
1085 ret = bond_option_arp_ip_target_add(bond, target);
1086 }
1087
1088 return ret;
1089}
1090
1091static int bond_option_arp_validate_set(struct bonding *bond,
1092 const struct bond_opt_value *newval)
1093{
1094 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1095 newval->string, newval->value);
1096
1097 if (bond->dev->flags & IFF_UP) {
1098 if (!newval->value)
1099 bond->recv_probe = NULL;
1100 else if (bond->params.arp_interval)
1101 bond->recv_probe = bond_arp_rcv;
1102 }
1103 bond->params.arp_validate = newval->value;
1104
1105 return 0;
1106}
1107
1108static int bond_option_arp_all_targets_set(struct bonding *bond,
1109 const struct bond_opt_value *newval)
1110{
1111 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1112 newval->string, newval->value);
1113 bond->params.arp_all_targets = newval->value;
1114
1115 return 0;
1116}
1117
1118static int bond_option_primary_set(struct bonding *bond,
1119 const struct bond_opt_value *newval)
1120{
1121 char *p, *primary = newval->string;
1122 struct list_head *iter;
1123 struct slave *slave;
1124
1125 block_netpoll_tx();
1126
1127 p = strchr(primary, '\n');
1128 if (p)
1129 *p = '\0';
1130 /* check to see if we are clearing primary */
1131 if (!strlen(primary)) {
1132 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1133 RCU_INIT_POINTER(bond->primary_slave, NULL);
1134 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1135 bond_select_active_slave(bond);
1136 goto out;
1137 }
1138
1139 bond_for_each_slave(bond, slave, iter) {
1140 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1141 netdev_dbg(bond->dev, "Setting %s as primary slave\n",
1142 slave->dev->name);
1143 rcu_assign_pointer(bond->primary_slave, slave);
1144 strcpy(bond->params.primary, slave->dev->name);
1145 bond_select_active_slave(bond);
1146 goto out;
1147 }
1148 }
1149
1150 if (rtnl_dereference(bond->primary_slave)) {
1151 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1152 RCU_INIT_POINTER(bond->primary_slave, NULL);
1153 bond_select_active_slave(bond);
1154 }
1155 strncpy(bond->params.primary, primary, IFNAMSIZ);
1156 bond->params.primary[IFNAMSIZ - 1] = 0;
1157
1158 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1159 primary, bond->dev->name);
1160
1161out:
1162 unblock_netpoll_tx();
1163
1164 return 0;
1165}
1166
1167static int bond_option_primary_reselect_set(struct bonding *bond,
1168 const struct bond_opt_value *newval)
1169{
1170 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1171 newval->string, newval->value);
1172 bond->params.primary_reselect = newval->value;
1173
1174 block_netpoll_tx();
1175 bond_select_active_slave(bond);
1176 unblock_netpoll_tx();
1177
1178 return 0;
1179}
1180
1181static int bond_option_fail_over_mac_set(struct bonding *bond,
1182 const struct bond_opt_value *newval)
1183{
1184 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1185 newval->string, newval->value);
1186 bond->params.fail_over_mac = newval->value;
1187
1188 return 0;
1189}
1190
1191static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1192 const struct bond_opt_value *newval)
1193{
1194 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1195 newval->string, newval->value);
1196 bond->params.xmit_policy = newval->value;
1197
1198 return 0;
1199}
1200
1201static int bond_option_resend_igmp_set(struct bonding *bond,
1202 const struct bond_opt_value *newval)
1203{
1204 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1205 newval->value);
1206 bond->params.resend_igmp = newval->value;
1207
1208 return 0;
1209}
1210
1211static int bond_option_num_peer_notif_set(struct bonding *bond,
1212 const struct bond_opt_value *newval)
1213{
1214 bond->params.num_peer_notif = newval->value;
1215
1216 return 0;
1217}
1218
1219static int bond_option_all_slaves_active_set(struct bonding *bond,
1220 const struct bond_opt_value *newval)
1221{
1222 struct list_head *iter;
1223 struct slave *slave;
1224
1225 if (newval->value == bond->params.all_slaves_active)
1226 return 0;
1227 bond->params.all_slaves_active = newval->value;
1228 bond_for_each_slave(bond, slave, iter) {
1229 if (!bond_is_active_slave(slave)) {
1230 if (newval->value)
1231 slave->inactive = 0;
1232 else
1233 slave->inactive = 1;
1234 }
1235 }
1236
1237 return 0;
1238}
1239
1240static int bond_option_min_links_set(struct bonding *bond,
1241 const struct bond_opt_value *newval)
1242{
1243 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1244 newval->value);
1245 bond->params.min_links = newval->value;
1246 bond_set_carrier(bond);
1247
1248 return 0;
1249}
1250
1251static int bond_option_lp_interval_set(struct bonding *bond,
1252 const struct bond_opt_value *newval)
1253{
1254 bond->params.lp_interval = newval->value;
1255
1256 return 0;
1257}
1258
1259static int bond_option_pps_set(struct bonding *bond,
1260 const struct bond_opt_value *newval)
1261{
1262 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1263 newval->value);
1264 bond->params.packets_per_slave = newval->value;
1265 if (newval->value > 0) {
1266 bond->params.reciprocal_packets_per_slave =
1267 reciprocal_value(newval->value);
1268 } else {
1269 /* reciprocal_packets_per_slave is unused if
1270 * packets_per_slave is 0 or 1, just initialize it
1271 */
1272 bond->params.reciprocal_packets_per_slave =
1273 (struct reciprocal_value) { 0 };
1274 }
1275
1276 return 0;
1277}
1278
1279static int bond_option_lacp_rate_set(struct bonding *bond,
1280 const struct bond_opt_value *newval)
1281{
1282 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1283 newval->string, newval->value);
1284 bond->params.lacp_fast = newval->value;
1285 bond_3ad_update_lacp_rate(bond);
1286
1287 return 0;
1288}
1289
1290static int bond_option_ad_select_set(struct bonding *bond,
1291 const struct bond_opt_value *newval)
1292{
1293 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1294 newval->string, newval->value);
1295 bond->params.ad_select = newval->value;
1296
1297 return 0;
1298}
1299
1300static int bond_option_queue_id_set(struct bonding *bond,
1301 const struct bond_opt_value *newval)
1302{
1303 struct slave *slave, *update_slave;
1304 struct net_device *sdev;
1305 struct list_head *iter;
1306 char *delim;
1307 int ret = 0;
1308 u16 qid;
1309
1310 /* delim will point to queue id if successful */
1311 delim = strchr(newval->string, ':');
1312 if (!delim)
1313 goto err_no_cmd;
1314
1315 /* Terminate string that points to device name and bump it
1316 * up one, so we can read the queue id there.
1317 */
1318 *delim = '\0';
1319 if (sscanf(++delim, "%hd\n", &qid) != 1)
1320 goto err_no_cmd;
1321
1322 /* Check buffer length, valid ifname and queue id */
1323 if (!dev_valid_name(newval->string) ||
1324 qid > bond->dev->real_num_tx_queues)
1325 goto err_no_cmd;
1326
1327 /* Get the pointer to that interface if it exists */
1328 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1329 if (!sdev)
1330 goto err_no_cmd;
1331
1332 /* Search for thes slave and check for duplicate qids */
1333 update_slave = NULL;
1334 bond_for_each_slave(bond, slave, iter) {
1335 if (sdev == slave->dev)
1336 /* We don't need to check the matching
1337 * slave for dups, since we're overwriting it
1338 */
1339 update_slave = slave;
1340 else if (qid && qid == slave->queue_id) {
1341 goto err_no_cmd;
1342 }
1343 }
1344
1345 if (!update_slave)
1346 goto err_no_cmd;
1347
1348 /* Actually set the qids for the slave */
1349 update_slave->queue_id = qid;
1350
1351out:
1352 return ret;
1353
1354err_no_cmd:
1355 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1356 ret = -EPERM;
1357 goto out;
1358
1359}
1360
1361static int bond_option_slaves_set(struct bonding *bond,
1362 const struct bond_opt_value *newval)
1363{
1364 char command[IFNAMSIZ + 1] = { 0, };
1365 struct net_device *dev;
1366 char *ifname;
1367 int ret;
1368
1369 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1370 ifname = command + 1;
1371 if ((strlen(command) <= 1) ||
1372 !dev_valid_name(ifname))
1373 goto err_no_cmd;
1374
1375 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1376 if (!dev) {
1377 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1378 ifname);
1379 ret = -ENODEV;
1380 goto out;
1381 }
1382
1383 switch (command[0]) {
1384 case '+':
1385 netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
1386 ret = bond_enslave(bond->dev, dev, NULL);
1387 break;
1388
1389 case '-':
1390 netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
1391 ret = bond_release(bond->dev, dev);
1392 break;
1393
1394 default:
1395 goto err_no_cmd;
1396 }
1397
1398out:
1399 return ret;
1400
1401err_no_cmd:
1402 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1403 ret = -EPERM;
1404 goto out;
1405}
1406
1407static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1408 const struct bond_opt_value *newval)
1409{
1410 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1411 newval->string, newval->value);
1412 bond->params.tlb_dynamic_lb = newval->value;
1413
1414 return 0;
1415}
1416
1417static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1418 const struct bond_opt_value *newval)
1419{
1420 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1421 newval->value);
1422
1423 bond->params.ad_actor_sys_prio = newval->value;
1424 bond_3ad_update_ad_actor_settings(bond);
1425
1426 return 0;
1427}
1428
1429static int bond_option_ad_actor_system_set(struct bonding *bond,
1430 const struct bond_opt_value *newval)
1431{
1432 u8 macaddr[ETH_ALEN];
1433 u8 *mac;
1434
1435 if (newval->string) {
1436 if (!mac_pton(newval->string, macaddr))
1437 goto err;
1438 mac = macaddr;
1439 } else {
1440 mac = (u8 *)&newval->value;
1441 }
1442
1443 if (!is_valid_ether_addr(mac))
1444 goto err;
1445
1446 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1447 ether_addr_copy(bond->params.ad_actor_system, mac);
1448 bond_3ad_update_ad_actor_settings(bond);
1449
1450 return 0;
1451
1452err:
1453 netdev_err(bond->dev, "Invalid MAC address.\n");
1454 return -EINVAL;
1455}
1456
1457static int bond_option_ad_user_port_key_set(struct bonding *bond,
1458 const struct bond_opt_value *newval)
1459{
1460 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1461 newval->value);
1462
1463 bond->params.ad_user_port_key = newval->value;
1464 return 0;
1465}