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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// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/bond/bond_options.c - bonding options
4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
6 */
7
8#include <linux/errno.h>
9#include <linux/if.h>
10#include <linux/netdevice.h>
11#include <linux/spinlock.h>
12#include <linux/rcupdate.h>
13#include <linux/ctype.h>
14#include <linux/inet.h>
15#include <linux/sched/signal.h>
16
17#include <net/bonding.h>
18
19static int bond_option_active_slave_set(struct bonding *bond,
20 const struct bond_opt_value *newval);
21static int bond_option_miimon_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23static int bond_option_updelay_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25static int bond_option_downdelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27static int bond_option_peer_notif_delay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29static int bond_option_use_carrier_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31static int bond_option_arp_interval_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
34static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
35static int bond_option_arp_ip_targets_set(struct bonding *bond,
36 const struct bond_opt_value *newval);
37static int bond_option_arp_validate_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39static int bond_option_arp_all_targets_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41static int bond_option_primary_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43static int bond_option_primary_reselect_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45static int bond_option_fail_over_mac_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47static int bond_option_xmit_hash_policy_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49static int bond_option_resend_igmp_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51static int bond_option_num_peer_notif_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53static int bond_option_all_slaves_active_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55static int bond_option_min_links_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57static int bond_option_lp_interval_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59static int bond_option_pps_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61static int bond_option_lacp_rate_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63static int bond_option_ad_select_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65static int bond_option_queue_id_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67static int bond_option_mode_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69static int bond_option_slaves_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75static int bond_option_ad_actor_system_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77static int bond_option_ad_user_port_key_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79
80
81static const struct bond_opt_value bond_mode_tbl[] = {
82 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
83 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
84 { "balance-xor", BOND_MODE_XOR, 0},
85 { "broadcast", BOND_MODE_BROADCAST, 0},
86 { "802.3ad", BOND_MODE_8023AD, 0},
87 { "balance-tlb", BOND_MODE_TLB, 0},
88 { "balance-alb", BOND_MODE_ALB, 0},
89 { NULL, -1, 0},
90};
91
92static const struct bond_opt_value bond_pps_tbl[] = {
93 { "default", 1, BOND_VALFLAG_DEFAULT},
94 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
95 { NULL, -1, 0},
96};
97
98static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
99 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
100 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
101 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
102 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
103 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
104 { NULL, -1, 0},
105};
106
107static const struct bond_opt_value bond_arp_validate_tbl[] = {
108 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
109 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
110 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
111 { "all", BOND_ARP_VALIDATE_ALL, 0},
112 { "filter", BOND_ARP_FILTER, 0},
113 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
114 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
115 { NULL, -1, 0},
116};
117
118static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
119 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
120 { "all", BOND_ARP_TARGETS_ALL, 0},
121 { NULL, -1, 0},
122};
123
124static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
125 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
126 { "active", BOND_FOM_ACTIVE, 0},
127 { "follow", BOND_FOM_FOLLOW, 0},
128 { NULL, -1, 0},
129};
130
131static const struct bond_opt_value bond_intmax_tbl[] = {
132 { "off", 0, BOND_VALFLAG_DEFAULT},
133 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
134 { NULL, -1, 0}
135};
136
137static const struct bond_opt_value bond_lacp_rate_tbl[] = {
138 { "slow", AD_LACP_SLOW, 0},
139 { "fast", AD_LACP_FAST, 0},
140 { NULL, -1, 0},
141};
142
143static const struct bond_opt_value bond_ad_select_tbl[] = {
144 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
145 { "bandwidth", BOND_AD_BANDWIDTH, 0},
146 { "count", BOND_AD_COUNT, 0},
147 { NULL, -1, 0},
148};
149
150static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
151 { "off", 0, 0},
152 { "maxval", 255, BOND_VALFLAG_MAX},
153 { "default", 1, BOND_VALFLAG_DEFAULT},
154 { NULL, -1, 0}
155};
156
157static const struct bond_opt_value bond_primary_reselect_tbl[] = {
158 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
159 { "better", BOND_PRI_RESELECT_BETTER, 0},
160 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
161 { NULL, -1},
162};
163
164static const struct bond_opt_value bond_use_carrier_tbl[] = {
165 { "off", 0, 0},
166 { "on", 1, BOND_VALFLAG_DEFAULT},
167 { NULL, -1, 0}
168};
169
170static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
171 { "off", 0, BOND_VALFLAG_DEFAULT},
172 { "on", 1, 0},
173 { NULL, -1, 0}
174};
175
176static const struct bond_opt_value bond_resend_igmp_tbl[] = {
177 { "off", 0, 0},
178 { "maxval", 255, BOND_VALFLAG_MAX},
179 { "default", 1, BOND_VALFLAG_DEFAULT},
180 { NULL, -1, 0}
181};
182
183static const struct bond_opt_value bond_lp_interval_tbl[] = {
184 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
185 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
186 { NULL, -1, 0},
187};
188
189static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
190 { "off", 0, 0},
191 { "on", 1, BOND_VALFLAG_DEFAULT},
192 { NULL, -1, 0}
193};
194
195static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
196 { "minval", 1, BOND_VALFLAG_MIN},
197 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
198 { NULL, -1, 0},
199};
200
201static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
202 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
203 { "maxval", 1023, BOND_VALFLAG_MAX},
204 { NULL, -1, 0},
205};
206
207static const struct bond_option bond_opts[BOND_OPT_LAST] = {
208 [BOND_OPT_MODE] = {
209 .id = BOND_OPT_MODE,
210 .name = "mode",
211 .desc = "bond device mode",
212 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
213 .values = bond_mode_tbl,
214 .set = bond_option_mode_set
215 },
216 [BOND_OPT_PACKETS_PER_SLAVE] = {
217 .id = BOND_OPT_PACKETS_PER_SLAVE,
218 .name = "packets_per_slave",
219 .desc = "Packets to send per slave in RR mode",
220 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
221 .values = bond_pps_tbl,
222 .set = bond_option_pps_set
223 },
224 [BOND_OPT_XMIT_HASH] = {
225 .id = BOND_OPT_XMIT_HASH,
226 .name = "xmit_hash_policy",
227 .desc = "balance-xor, 802.3ad, and tlb hashing method",
228 .values = bond_xmit_hashtype_tbl,
229 .set = bond_option_xmit_hash_policy_set
230 },
231 [BOND_OPT_ARP_VALIDATE] = {
232 .id = BOND_OPT_ARP_VALIDATE,
233 .name = "arp_validate",
234 .desc = "validate src/dst of ARP probes",
235 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
236 BIT(BOND_MODE_ALB),
237 .values = bond_arp_validate_tbl,
238 .set = bond_option_arp_validate_set
239 },
240 [BOND_OPT_ARP_ALL_TARGETS] = {
241 .id = BOND_OPT_ARP_ALL_TARGETS,
242 .name = "arp_all_targets",
243 .desc = "fail on any/all arp targets timeout",
244 .values = bond_arp_all_targets_tbl,
245 .set = bond_option_arp_all_targets_set
246 },
247 [BOND_OPT_FAIL_OVER_MAC] = {
248 .id = BOND_OPT_FAIL_OVER_MAC,
249 .name = "fail_over_mac",
250 .desc = "For active-backup, do not set all slaves to the same MAC",
251 .flags = BOND_OPTFLAG_NOSLAVES,
252 .values = bond_fail_over_mac_tbl,
253 .set = bond_option_fail_over_mac_set
254 },
255 [BOND_OPT_ARP_INTERVAL] = {
256 .id = BOND_OPT_ARP_INTERVAL,
257 .name = "arp_interval",
258 .desc = "arp interval in milliseconds",
259 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
260 BIT(BOND_MODE_ALB),
261 .values = bond_intmax_tbl,
262 .set = bond_option_arp_interval_set
263 },
264 [BOND_OPT_ARP_TARGETS] = {
265 .id = BOND_OPT_ARP_TARGETS,
266 .name = "arp_ip_target",
267 .desc = "arp targets in n.n.n.n form",
268 .flags = BOND_OPTFLAG_RAWVAL,
269 .set = bond_option_arp_ip_targets_set
270 },
271 [BOND_OPT_DOWNDELAY] = {
272 .id = BOND_OPT_DOWNDELAY,
273 .name = "downdelay",
274 .desc = "Delay before considering link down, in milliseconds",
275 .values = bond_intmax_tbl,
276 .set = bond_option_downdelay_set
277 },
278 [BOND_OPT_UPDELAY] = {
279 .id = BOND_OPT_UPDELAY,
280 .name = "updelay",
281 .desc = "Delay before considering link up, in milliseconds",
282 .values = bond_intmax_tbl,
283 .set = bond_option_updelay_set
284 },
285 [BOND_OPT_LACP_RATE] = {
286 .id = BOND_OPT_LACP_RATE,
287 .name = "lacp_rate",
288 .desc = "LACPDU tx rate to request from 802.3ad partner",
289 .flags = BOND_OPTFLAG_IFDOWN,
290 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
291 .values = bond_lacp_rate_tbl,
292 .set = bond_option_lacp_rate_set
293 },
294 [BOND_OPT_MINLINKS] = {
295 .id = BOND_OPT_MINLINKS,
296 .name = "min_links",
297 .desc = "Minimum number of available links before turning on carrier",
298 .values = bond_intmax_tbl,
299 .set = bond_option_min_links_set
300 },
301 [BOND_OPT_AD_SELECT] = {
302 .id = BOND_OPT_AD_SELECT,
303 .name = "ad_select",
304 .desc = "803.ad aggregation selection logic",
305 .flags = BOND_OPTFLAG_IFDOWN,
306 .values = bond_ad_select_tbl,
307 .set = bond_option_ad_select_set
308 },
309 [BOND_OPT_NUM_PEER_NOTIF] = {
310 .id = BOND_OPT_NUM_PEER_NOTIF,
311 .name = "num_unsol_na",
312 .desc = "Number of peer notifications to send on failover event",
313 .values = bond_num_peer_notif_tbl,
314 .set = bond_option_num_peer_notif_set
315 },
316 [BOND_OPT_MIIMON] = {
317 .id = BOND_OPT_MIIMON,
318 .name = "miimon",
319 .desc = "Link check interval in milliseconds",
320 .values = bond_intmax_tbl,
321 .set = bond_option_miimon_set
322 },
323 [BOND_OPT_PRIMARY] = {
324 .id = BOND_OPT_PRIMARY,
325 .name = "primary",
326 .desc = "Primary network device to use",
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_primary_set
332 },
333 [BOND_OPT_PRIMARY_RESELECT] = {
334 .id = BOND_OPT_PRIMARY_RESELECT,
335 .name = "primary_reselect",
336 .desc = "Reselect primary slave once it comes up",
337 .values = bond_primary_reselect_tbl,
338 .set = bond_option_primary_reselect_set
339 },
340 [BOND_OPT_USE_CARRIER] = {
341 .id = BOND_OPT_USE_CARRIER,
342 .name = "use_carrier",
343 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
344 .values = bond_use_carrier_tbl,
345 .set = bond_option_use_carrier_set
346 },
347 [BOND_OPT_ACTIVE_SLAVE] = {
348 .id = BOND_OPT_ACTIVE_SLAVE,
349 .name = "active_slave",
350 .desc = "Currently active slave",
351 .flags = BOND_OPTFLAG_RAWVAL,
352 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
353 BIT(BOND_MODE_TLB) |
354 BIT(BOND_MODE_ALB)),
355 .set = bond_option_active_slave_set
356 },
357 [BOND_OPT_QUEUE_ID] = {
358 .id = BOND_OPT_QUEUE_ID,
359 .name = "queue_id",
360 .desc = "Set queue id of a slave",
361 .flags = BOND_OPTFLAG_RAWVAL,
362 .set = bond_option_queue_id_set
363 },
364 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
365 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
366 .name = "all_slaves_active",
367 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
368 .values = bond_all_slaves_active_tbl,
369 .set = bond_option_all_slaves_active_set
370 },
371 [BOND_OPT_RESEND_IGMP] = {
372 .id = BOND_OPT_RESEND_IGMP,
373 .name = "resend_igmp",
374 .desc = "Number of IGMP membership reports to send on link failure",
375 .values = bond_resend_igmp_tbl,
376 .set = bond_option_resend_igmp_set
377 },
378 [BOND_OPT_LP_INTERVAL] = {
379 .id = BOND_OPT_LP_INTERVAL,
380 .name = "lp_interval",
381 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
382 .values = bond_lp_interval_tbl,
383 .set = bond_option_lp_interval_set
384 },
385 [BOND_OPT_SLAVES] = {
386 .id = BOND_OPT_SLAVES,
387 .name = "slaves",
388 .desc = "Slave membership management",
389 .flags = BOND_OPTFLAG_RAWVAL,
390 .set = bond_option_slaves_set
391 },
392 [BOND_OPT_TLB_DYNAMIC_LB] = {
393 .id = BOND_OPT_TLB_DYNAMIC_LB,
394 .name = "tlb_dynamic_lb",
395 .desc = "Enable dynamic flow shuffling",
396 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
397 .values = bond_tlb_dynamic_lb_tbl,
398 .flags = BOND_OPTFLAG_IFDOWN,
399 .set = bond_option_tlb_dynamic_lb_set,
400 },
401 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
402 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
403 .name = "ad_actor_sys_prio",
404 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
405 .values = bond_ad_actor_sys_prio_tbl,
406 .set = bond_option_ad_actor_sys_prio_set,
407 },
408 [BOND_OPT_AD_ACTOR_SYSTEM] = {
409 .id = BOND_OPT_AD_ACTOR_SYSTEM,
410 .name = "ad_actor_system",
411 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
412 .flags = BOND_OPTFLAG_RAWVAL,
413 .set = bond_option_ad_actor_system_set,
414 },
415 [BOND_OPT_AD_USER_PORT_KEY] = {
416 .id = BOND_OPT_AD_USER_PORT_KEY,
417 .name = "ad_user_port_key",
418 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
419 .flags = BOND_OPTFLAG_IFDOWN,
420 .values = bond_ad_user_port_key_tbl,
421 .set = bond_option_ad_user_port_key_set,
422 },
423 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
424 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
425 .name = "num_grat_arp",
426 .desc = "Number of peer notifications to send on failover event",
427 .values = bond_num_peer_notif_tbl,
428 .set = bond_option_num_peer_notif_set
429 },
430 [BOND_OPT_PEER_NOTIF_DELAY] = {
431 .id = BOND_OPT_PEER_NOTIF_DELAY,
432 .name = "peer_notif_delay",
433 .desc = "Delay between each peer notification on failover event, in milliseconds",
434 .values = bond_intmax_tbl,
435 .set = bond_option_peer_notif_delay_set
436 }
437};
438
439/* Searches for an option by name */
440const struct bond_option *bond_opt_get_by_name(const char *name)
441{
442 const struct bond_option *opt;
443 int option;
444
445 for (option = 0; option < BOND_OPT_LAST; option++) {
446 opt = bond_opt_get(option);
447 if (opt && !strcmp(opt->name, name))
448 return opt;
449 }
450
451 return NULL;
452}
453
454/* Searches for a value in opt's values[] table */
455const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
456{
457 const struct bond_option *opt;
458 int i;
459
460 opt = bond_opt_get(option);
461 if (WARN_ON(!opt))
462 return NULL;
463 for (i = 0; opt->values && opt->values[i].string; i++)
464 if (opt->values[i].value == val)
465 return &opt->values[i];
466
467 return NULL;
468}
469
470/* Searches for a value in opt's values[] table which matches the flagmask */
471static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
472 u32 flagmask)
473{
474 int i;
475
476 for (i = 0; opt->values && opt->values[i].string; i++)
477 if (opt->values[i].flags & flagmask)
478 return &opt->values[i];
479
480 return NULL;
481}
482
483/* If maxval is missing then there's no range to check. In case minval is
484 * missing then it's considered to be 0.
485 */
486static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
487{
488 const struct bond_opt_value *minval, *maxval;
489
490 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
491 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
492 if (!maxval || (minval && val < minval->value) || val > maxval->value)
493 return false;
494
495 return true;
496}
497
498/**
499 * bond_opt_parse - parse option value
500 * @opt: the option to parse against
501 * @val: value to parse
502 *
503 * This function tries to extract the value from @val and check if it's
504 * a possible match for the option and returns NULL if a match isn't found,
505 * or the struct_opt_value that matched. It also strips the new line from
506 * @val->string if it's present.
507 */
508const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
509 struct bond_opt_value *val)
510{
511 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
512 const struct bond_opt_value *tbl;
513 const struct bond_opt_value *ret = NULL;
514 bool checkval;
515 int i, rv;
516
517 /* No parsing if the option wants a raw val */
518 if (opt->flags & BOND_OPTFLAG_RAWVAL)
519 return val;
520
521 tbl = opt->values;
522 if (!tbl)
523 goto out;
524
525 /* ULLONG_MAX is used to bypass string processing */
526 checkval = val->value != ULLONG_MAX;
527 if (!checkval) {
528 if (!val->string)
529 goto out;
530 p = strchr(val->string, '\n');
531 if (p)
532 *p = '\0';
533 for (p = val->string; *p; p++)
534 if (!(isdigit(*p) || isspace(*p)))
535 break;
536 /* The following code extracts the string to match or the value
537 * and sets checkval appropriately
538 */
539 if (*p) {
540 rv = sscanf(val->string, "%32s", valstr);
541 } else {
542 rv = sscanf(val->string, "%llu", &val->value);
543 checkval = true;
544 }
545 if (!rv)
546 goto out;
547 }
548
549 for (i = 0; tbl[i].string; i++) {
550 /* Check for exact match */
551 if (checkval) {
552 if (val->value == tbl[i].value)
553 ret = &tbl[i];
554 } else {
555 if (!strcmp(valstr, "default") &&
556 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
557 ret = &tbl[i];
558
559 if (!strcmp(valstr, tbl[i].string))
560 ret = &tbl[i];
561 }
562 /* Found an exact match */
563 if (ret)
564 goto out;
565 }
566 /* Possible range match */
567 if (checkval && bond_opt_check_range(opt, val->value))
568 ret = val;
569out:
570 return ret;
571}
572
573/* Check opt's dependencies against bond mode and currently set options */
574static int bond_opt_check_deps(struct bonding *bond,
575 const struct bond_option *opt)
576{
577 struct bond_params *params = &bond->params;
578
579 if (test_bit(params->mode, &opt->unsuppmodes))
580 return -EACCES;
581 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
582 return -ENOTEMPTY;
583 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
584 return -EBUSY;
585
586 return 0;
587}
588
589static void bond_opt_dep_print(struct bonding *bond,
590 const struct bond_option *opt)
591{
592 const struct bond_opt_value *modeval;
593 struct bond_params *params;
594
595 params = &bond->params;
596 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
597 if (test_bit(params->mode, &opt->unsuppmodes))
598 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
599 opt->name, modeval->string, modeval->value);
600}
601
602static void bond_opt_error_interpret(struct bonding *bond,
603 const struct bond_option *opt,
604 int error, const struct bond_opt_value *val)
605{
606 const struct bond_opt_value *minval, *maxval;
607 char *p;
608
609 switch (error) {
610 case -EINVAL:
611 if (val) {
612 if (val->string) {
613 /* sometimes RAWVAL opts may have new lines */
614 p = strchr(val->string, '\n');
615 if (p)
616 *p = '\0';
617 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
618 opt->name, val->string);
619 } else {
620 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
621 opt->name, val->value);
622 }
623 }
624 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
625 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
626 if (!maxval)
627 break;
628 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
629 opt->name, minval ? minval->value : 0, maxval->value);
630 break;
631 case -EACCES:
632 bond_opt_dep_print(bond, opt);
633 break;
634 case -ENOTEMPTY:
635 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
636 opt->name);
637 break;
638 case -EBUSY:
639 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
640 opt->name);
641 break;
642 default:
643 break;
644 }
645}
646
647/**
648 * __bond_opt_set - set a bonding option
649 * @bond: target bond device
650 * @option: option to set
651 * @val: value to set it to
652 *
653 * This function is used to change the bond's option value, it can be
654 * used for both enabling/changing an option and for disabling it. RTNL lock
655 * must be obtained before calling this function.
656 */
657int __bond_opt_set(struct bonding *bond,
658 unsigned int option, struct bond_opt_value *val)
659{
660 const struct bond_opt_value *retval = NULL;
661 const struct bond_option *opt;
662 int ret = -ENOENT;
663
664 ASSERT_RTNL();
665
666 opt = bond_opt_get(option);
667 if (WARN_ON(!val) || WARN_ON(!opt))
668 goto out;
669 ret = bond_opt_check_deps(bond, opt);
670 if (ret)
671 goto out;
672 retval = bond_opt_parse(opt, val);
673 if (!retval) {
674 ret = -EINVAL;
675 goto out;
676 }
677 ret = opt->set(bond, retval);
678out:
679 if (ret)
680 bond_opt_error_interpret(bond, opt, ret, val);
681
682 return ret;
683}
684/**
685 * __bond_opt_set_notify - set a bonding option
686 * @bond: target bond device
687 * @option: option to set
688 * @val: value to set it to
689 *
690 * This function is used to change the bond's option value and trigger
691 * a notification to user sapce. It can be used for both enabling/changing
692 * an option and for disabling it. RTNL lock must be obtained before calling
693 * this function.
694 */
695int __bond_opt_set_notify(struct bonding *bond,
696 unsigned int option, struct bond_opt_value *val)
697{
698 int ret = -ENOENT;
699
700 ASSERT_RTNL();
701
702 ret = __bond_opt_set(bond, option, val);
703
704 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
705 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
706
707 return ret;
708}
709
710/**
711 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
712 * @bond: target bond device
713 * @option: option to set
714 * @buf: value to set it to
715 *
716 * This function tries to acquire RTNL without blocking and if successful
717 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
718 */
719int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
720{
721 struct bond_opt_value optval;
722 int ret;
723
724 if (!rtnl_trylock())
725 return restart_syscall();
726 bond_opt_initstr(&optval, buf);
727 ret = __bond_opt_set_notify(bond, option, &optval);
728 rtnl_unlock();
729
730 return ret;
731}
732
733/**
734 * bond_opt_get - get a pointer to an option
735 * @option: option for which to return a pointer
736 *
737 * This function checks if option is valid and if so returns a pointer
738 * to its entry in the bond_opts[] option array.
739 */
740const struct bond_option *bond_opt_get(unsigned int option)
741{
742 if (!BOND_OPT_VALID(option))
743 return NULL;
744
745 return &bond_opts[option];
746}
747
748static int bond_option_mode_set(struct bonding *bond,
749 const struct bond_opt_value *newval)
750{
751 if (!bond_mode_uses_arp(newval->value)) {
752 if (bond->params.arp_interval) {
753 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
754 newval->string);
755 /* disable arp monitoring */
756 bond->params.arp_interval = 0;
757 }
758
759 if (!bond->params.miimon) {
760 /* set miimon to default value */
761 bond->params.miimon = BOND_DEFAULT_MIIMON;
762 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
763 bond->params.miimon);
764 }
765 }
766
767 if (newval->value == BOND_MODE_ALB)
768 bond->params.tlb_dynamic_lb = 1;
769
770 /* don't cache arp_validate between modes */
771 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
772 bond->params.mode = newval->value;
773
774 return 0;
775}
776
777static int bond_option_active_slave_set(struct bonding *bond,
778 const struct bond_opt_value *newval)
779{
780 char ifname[IFNAMSIZ] = { 0, };
781 struct net_device *slave_dev;
782 int ret = 0;
783
784 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
785 if (!strlen(ifname) || newval->string[0] == '\n') {
786 slave_dev = NULL;
787 } else {
788 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
789 if (!slave_dev)
790 return -ENODEV;
791 }
792
793 if (slave_dev) {
794 if (!netif_is_bond_slave(slave_dev)) {
795 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
796 return -EINVAL;
797 }
798
799 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
800 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
801 return -EINVAL;
802 }
803 }
804
805 block_netpoll_tx();
806 /* check to see if we are clearing active */
807 if (!slave_dev) {
808 netdev_dbg(bond->dev, "Clearing current active slave\n");
809 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
810 bond_select_active_slave(bond);
811 } else {
812 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
813 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
814
815 BUG_ON(!new_active);
816
817 if (new_active == old_active) {
818 /* do nothing */
819 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
820 } else {
821 if (old_active && (new_active->link == BOND_LINK_UP) &&
822 bond_slave_is_up(new_active)) {
823 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
824 bond_change_active_slave(bond, new_active);
825 } else {
826 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
827 new_active->dev->name);
828 ret = -EINVAL;
829 }
830 }
831 }
832 unblock_netpoll_tx();
833
834 return ret;
835}
836
837/* There are two tricky bits here. First, if MII monitoring is activated, then
838 * we must disable ARP monitoring. Second, if the timer isn't running, we must
839 * start it.
840 */
841static int bond_option_miimon_set(struct bonding *bond,
842 const struct bond_opt_value *newval)
843{
844 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
845 newval->value);
846 bond->params.miimon = newval->value;
847 if (bond->params.updelay)
848 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
849 bond->params.updelay * bond->params.miimon);
850 if (bond->params.downdelay)
851 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
852 bond->params.downdelay * bond->params.miimon);
853 if (bond->params.peer_notif_delay)
854 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
855 bond->params.peer_notif_delay * bond->params.miimon);
856 if (newval->value && bond->params.arp_interval) {
857 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
858 bond->params.arp_interval = 0;
859 if (bond->params.arp_validate)
860 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
861 }
862 if (bond->dev->flags & IFF_UP) {
863 /* If the interface is up, we may need to fire off
864 * the MII timer. If the interface is down, the
865 * timer will get fired off when the open function
866 * is called.
867 */
868 if (!newval->value) {
869 cancel_delayed_work_sync(&bond->mii_work);
870 } else {
871 cancel_delayed_work_sync(&bond->arp_work);
872 queue_delayed_work(bond->wq, &bond->mii_work, 0);
873 }
874 }
875
876 return 0;
877}
878
879/* Set up, down and peer notification delays. These must be multiples
880 * of the MII monitoring value, and are stored internally as the
881 * multiplier. Thus, we must translate to MS for the real world.
882 */
883static int _bond_option_delay_set(struct bonding *bond,
884 const struct bond_opt_value *newval,
885 const char *name,
886 int *target)
887{
888 int value = newval->value;
889
890 if (!bond->params.miimon) {
891 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
892 name);
893 return -EPERM;
894 }
895 if ((value % bond->params.miimon) != 0) {
896 netdev_warn(bond->dev,
897 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
898 name,
899 value, bond->params.miimon,
900 (value / bond->params.miimon) *
901 bond->params.miimon);
902 }
903 *target = value / bond->params.miimon;
904 netdev_dbg(bond->dev, "Setting %s to %d\n",
905 name,
906 *target * bond->params.miimon);
907
908 return 0;
909}
910
911static int bond_option_updelay_set(struct bonding *bond,
912 const struct bond_opt_value *newval)
913{
914 return _bond_option_delay_set(bond, newval, "up delay",
915 &bond->params.updelay);
916}
917
918static int bond_option_downdelay_set(struct bonding *bond,
919 const struct bond_opt_value *newval)
920{
921 return _bond_option_delay_set(bond, newval, "down delay",
922 &bond->params.downdelay);
923}
924
925static int bond_option_peer_notif_delay_set(struct bonding *bond,
926 const struct bond_opt_value *newval)
927{
928 int ret = _bond_option_delay_set(bond, newval,
929 "peer notification delay",
930 &bond->params.peer_notif_delay);
931 return ret;
932}
933
934static int bond_option_use_carrier_set(struct bonding *bond,
935 const struct bond_opt_value *newval)
936{
937 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
938 newval->value);
939 bond->params.use_carrier = newval->value;
940
941 return 0;
942}
943
944/* There are two tricky bits here. First, if ARP monitoring is activated, then
945 * we must disable MII monitoring. Second, if the ARP timer isn't running,
946 * we must start it.
947 */
948static int bond_option_arp_interval_set(struct bonding *bond,
949 const struct bond_opt_value *newval)
950{
951 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
952 newval->value);
953 bond->params.arp_interval = newval->value;
954 if (newval->value) {
955 if (bond->params.miimon) {
956 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
957 bond->params.miimon = 0;
958 }
959 if (!bond->params.arp_targets[0])
960 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
961 }
962 if (bond->dev->flags & IFF_UP) {
963 /* If the interface is up, we may need to fire off
964 * the ARP timer. If the interface is down, the
965 * timer will get fired off when the open function
966 * is called.
967 */
968 if (!newval->value) {
969 if (bond->params.arp_validate)
970 bond->recv_probe = NULL;
971 cancel_delayed_work_sync(&bond->arp_work);
972 } else {
973 /* arp_validate can be set only in active-backup mode */
974 bond->recv_probe = bond_arp_rcv;
975 cancel_delayed_work_sync(&bond->mii_work);
976 queue_delayed_work(bond->wq, &bond->arp_work, 0);
977 }
978 }
979
980 return 0;
981}
982
983static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
984 __be32 target,
985 unsigned long last_rx)
986{
987 __be32 *targets = bond->params.arp_targets;
988 struct list_head *iter;
989 struct slave *slave;
990
991 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
992 bond_for_each_slave(bond, slave, iter)
993 slave->target_last_arp_rx[slot] = last_rx;
994 targets[slot] = target;
995 }
996}
997
998static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
999{
1000 __be32 *targets = bond->params.arp_targets;
1001 int ind;
1002
1003 if (!bond_is_ip_target_ok(target)) {
1004 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1005 &target);
1006 return -EINVAL;
1007 }
1008
1009 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1010 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1011 &target);
1012 return -EINVAL;
1013 }
1014
1015 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1016 if (ind == -1) {
1017 netdev_err(bond->dev, "ARP target table is full!\n");
1018 return -EINVAL;
1019 }
1020
1021 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1022
1023 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1024
1025 return 0;
1026}
1027
1028static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1029{
1030 return _bond_option_arp_ip_target_add(bond, target);
1031}
1032
1033static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1034{
1035 __be32 *targets = bond->params.arp_targets;
1036 struct list_head *iter;
1037 struct slave *slave;
1038 unsigned long *targets_rx;
1039 int ind, i;
1040
1041 if (!bond_is_ip_target_ok(target)) {
1042 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1043 &target);
1044 return -EINVAL;
1045 }
1046
1047 ind = bond_get_targets_ip(targets, target);
1048 if (ind == -1) {
1049 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1050 &target);
1051 return -EINVAL;
1052 }
1053
1054 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1055 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1056
1057 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1058
1059 bond_for_each_slave(bond, slave, iter) {
1060 targets_rx = slave->target_last_arp_rx;
1061 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1062 targets_rx[i] = targets_rx[i+1];
1063 targets_rx[i] = 0;
1064 }
1065 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1066 targets[i] = targets[i+1];
1067 targets[i] = 0;
1068
1069 return 0;
1070}
1071
1072void bond_option_arp_ip_targets_clear(struct bonding *bond)
1073{
1074 int i;
1075
1076 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1077 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1078}
1079
1080static int bond_option_arp_ip_targets_set(struct bonding *bond,
1081 const struct bond_opt_value *newval)
1082{
1083 int ret = -EPERM;
1084 __be32 target;
1085
1086 if (newval->string) {
1087 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1088 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1089 &target);
1090 return ret;
1091 }
1092 if (newval->string[0] == '+')
1093 ret = bond_option_arp_ip_target_add(bond, target);
1094 else if (newval->string[0] == '-')
1095 ret = bond_option_arp_ip_target_rem(bond, target);
1096 else
1097 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1098 } else {
1099 target = newval->value;
1100 ret = bond_option_arp_ip_target_add(bond, target);
1101 }
1102
1103 return ret;
1104}
1105
1106static int bond_option_arp_validate_set(struct bonding *bond,
1107 const struct bond_opt_value *newval)
1108{
1109 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1110 newval->string, newval->value);
1111 bond->params.arp_validate = newval->value;
1112
1113 return 0;
1114}
1115
1116static int bond_option_arp_all_targets_set(struct bonding *bond,
1117 const struct bond_opt_value *newval)
1118{
1119 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1120 newval->string, newval->value);
1121 bond->params.arp_all_targets = newval->value;
1122
1123 return 0;
1124}
1125
1126static int bond_option_primary_set(struct bonding *bond,
1127 const struct bond_opt_value *newval)
1128{
1129 char *p, *primary = newval->string;
1130 struct list_head *iter;
1131 struct slave *slave;
1132
1133 block_netpoll_tx();
1134
1135 p = strchr(primary, '\n');
1136 if (p)
1137 *p = '\0';
1138 /* check to see if we are clearing primary */
1139 if (!strlen(primary)) {
1140 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1141 RCU_INIT_POINTER(bond->primary_slave, NULL);
1142 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1143 bond_select_active_slave(bond);
1144 goto out;
1145 }
1146
1147 bond_for_each_slave(bond, slave, iter) {
1148 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1149 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1150 rcu_assign_pointer(bond->primary_slave, slave);
1151 strcpy(bond->params.primary, slave->dev->name);
1152 bond->force_primary = true;
1153 bond_select_active_slave(bond);
1154 goto out;
1155 }
1156 }
1157
1158 if (rtnl_dereference(bond->primary_slave)) {
1159 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1160 RCU_INIT_POINTER(bond->primary_slave, NULL);
1161 bond_select_active_slave(bond);
1162 }
1163 strncpy(bond->params.primary, primary, IFNAMSIZ);
1164 bond->params.primary[IFNAMSIZ - 1] = 0;
1165
1166 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1167 primary);
1168
1169out:
1170 unblock_netpoll_tx();
1171
1172 return 0;
1173}
1174
1175static int bond_option_primary_reselect_set(struct bonding *bond,
1176 const struct bond_opt_value *newval)
1177{
1178 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1179 newval->string, newval->value);
1180 bond->params.primary_reselect = newval->value;
1181
1182 block_netpoll_tx();
1183 bond_select_active_slave(bond);
1184 unblock_netpoll_tx();
1185
1186 return 0;
1187}
1188
1189static int bond_option_fail_over_mac_set(struct bonding *bond,
1190 const struct bond_opt_value *newval)
1191{
1192 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1193 newval->string, newval->value);
1194 bond->params.fail_over_mac = newval->value;
1195
1196 return 0;
1197}
1198
1199static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1200 const struct bond_opt_value *newval)
1201{
1202 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1203 newval->string, newval->value);
1204 bond->params.xmit_policy = newval->value;
1205
1206 return 0;
1207}
1208
1209static int bond_option_resend_igmp_set(struct bonding *bond,
1210 const struct bond_opt_value *newval)
1211{
1212 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1213 newval->value);
1214 bond->params.resend_igmp = newval->value;
1215
1216 return 0;
1217}
1218
1219static int bond_option_num_peer_notif_set(struct bonding *bond,
1220 const struct bond_opt_value *newval)
1221{
1222 bond->params.num_peer_notif = newval->value;
1223
1224 return 0;
1225}
1226
1227static int bond_option_all_slaves_active_set(struct bonding *bond,
1228 const struct bond_opt_value *newval)
1229{
1230 struct list_head *iter;
1231 struct slave *slave;
1232
1233 if (newval->value == bond->params.all_slaves_active)
1234 return 0;
1235 bond->params.all_slaves_active = newval->value;
1236 bond_for_each_slave(bond, slave, iter) {
1237 if (!bond_is_active_slave(slave)) {
1238 if (newval->value)
1239 slave->inactive = 0;
1240 else
1241 slave->inactive = 1;
1242 }
1243 }
1244
1245 return 0;
1246}
1247
1248static int bond_option_min_links_set(struct bonding *bond,
1249 const struct bond_opt_value *newval)
1250{
1251 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1252 newval->value);
1253 bond->params.min_links = newval->value;
1254 bond_set_carrier(bond);
1255
1256 return 0;
1257}
1258
1259static int bond_option_lp_interval_set(struct bonding *bond,
1260 const struct bond_opt_value *newval)
1261{
1262 bond->params.lp_interval = newval->value;
1263
1264 return 0;
1265}
1266
1267static int bond_option_pps_set(struct bonding *bond,
1268 const struct bond_opt_value *newval)
1269{
1270 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1271 newval->value);
1272 bond->params.packets_per_slave = newval->value;
1273 if (newval->value > 0) {
1274 bond->params.reciprocal_packets_per_slave =
1275 reciprocal_value(newval->value);
1276 } else {
1277 /* reciprocal_packets_per_slave is unused if
1278 * packets_per_slave is 0 or 1, just initialize it
1279 */
1280 bond->params.reciprocal_packets_per_slave =
1281 (struct reciprocal_value) { 0 };
1282 }
1283
1284 return 0;
1285}
1286
1287static int bond_option_lacp_rate_set(struct bonding *bond,
1288 const struct bond_opt_value *newval)
1289{
1290 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1291 newval->string, newval->value);
1292 bond->params.lacp_fast = newval->value;
1293 bond_3ad_update_lacp_rate(bond);
1294
1295 return 0;
1296}
1297
1298static int bond_option_ad_select_set(struct bonding *bond,
1299 const struct bond_opt_value *newval)
1300{
1301 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1302 newval->string, newval->value);
1303 bond->params.ad_select = newval->value;
1304
1305 return 0;
1306}
1307
1308static int bond_option_queue_id_set(struct bonding *bond,
1309 const struct bond_opt_value *newval)
1310{
1311 struct slave *slave, *update_slave;
1312 struct net_device *sdev;
1313 struct list_head *iter;
1314 char *delim;
1315 int ret = 0;
1316 u16 qid;
1317
1318 /* delim will point to queue id if successful */
1319 delim = strchr(newval->string, ':');
1320 if (!delim)
1321 goto err_no_cmd;
1322
1323 /* Terminate string that points to device name and bump it
1324 * up one, so we can read the queue id there.
1325 */
1326 *delim = '\0';
1327 if (sscanf(++delim, "%hd\n", &qid) != 1)
1328 goto err_no_cmd;
1329
1330 /* Check buffer length, valid ifname and queue id */
1331 if (!dev_valid_name(newval->string) ||
1332 qid > bond->dev->real_num_tx_queues)
1333 goto err_no_cmd;
1334
1335 /* Get the pointer to that interface if it exists */
1336 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1337 if (!sdev)
1338 goto err_no_cmd;
1339
1340 /* Search for thes slave and check for duplicate qids */
1341 update_slave = NULL;
1342 bond_for_each_slave(bond, slave, iter) {
1343 if (sdev == slave->dev)
1344 /* We don't need to check the matching
1345 * slave for dups, since we're overwriting it
1346 */
1347 update_slave = slave;
1348 else if (qid && qid == slave->queue_id) {
1349 goto err_no_cmd;
1350 }
1351 }
1352
1353 if (!update_slave)
1354 goto err_no_cmd;
1355
1356 /* Actually set the qids for the slave */
1357 update_slave->queue_id = qid;
1358
1359out:
1360 return ret;
1361
1362err_no_cmd:
1363 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1364 ret = -EPERM;
1365 goto out;
1366
1367}
1368
1369static int bond_option_slaves_set(struct bonding *bond,
1370 const struct bond_opt_value *newval)
1371{
1372 char command[IFNAMSIZ + 1] = { 0, };
1373 struct net_device *dev;
1374 char *ifname;
1375 int ret;
1376
1377 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1378 ifname = command + 1;
1379 if ((strlen(command) <= 1) ||
1380 (command[0] != '+' && command[0] != '-') ||
1381 !dev_valid_name(ifname))
1382 goto err_no_cmd;
1383
1384 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1385 if (!dev) {
1386 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1387 ifname);
1388 ret = -ENODEV;
1389 goto out;
1390 }
1391
1392 switch (command[0]) {
1393 case '+':
1394 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1395 ret = bond_enslave(bond->dev, dev, NULL);
1396 break;
1397
1398 case '-':
1399 slave_dbg(bond->dev, dev, "Releasing interface\n");
1400 ret = bond_release(bond->dev, dev);
1401 break;
1402
1403 default:
1404 /* should not run here. */
1405 goto err_no_cmd;
1406 }
1407
1408out:
1409 return ret;
1410
1411err_no_cmd:
1412 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1413 ret = -EPERM;
1414 goto out;
1415}
1416
1417static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1418 const struct bond_opt_value *newval)
1419{
1420 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1421 newval->string, newval->value);
1422 bond->params.tlb_dynamic_lb = newval->value;
1423
1424 return 0;
1425}
1426
1427static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1428 const struct bond_opt_value *newval)
1429{
1430 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1431 newval->value);
1432
1433 bond->params.ad_actor_sys_prio = newval->value;
1434 bond_3ad_update_ad_actor_settings(bond);
1435
1436 return 0;
1437}
1438
1439static int bond_option_ad_actor_system_set(struct bonding *bond,
1440 const struct bond_opt_value *newval)
1441{
1442 u8 macaddr[ETH_ALEN];
1443 u8 *mac;
1444
1445 if (newval->string) {
1446 if (!mac_pton(newval->string, macaddr))
1447 goto err;
1448 mac = macaddr;
1449 } else {
1450 mac = (u8 *)&newval->value;
1451 }
1452
1453 if (!is_valid_ether_addr(mac))
1454 goto err;
1455
1456 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1457 ether_addr_copy(bond->params.ad_actor_system, mac);
1458 bond_3ad_update_ad_actor_settings(bond);
1459
1460 return 0;
1461
1462err:
1463 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1464 return -EINVAL;
1465}
1466
1467static int bond_option_ad_user_port_key_set(struct bonding *bond,
1468 const struct bond_opt_value *newval)
1469{
1470 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1471 newval->value);
1472
1473 bond->params.ad_user_port_key = newval->value;
1474 return 0;
1475}