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ARM: dts: add 'dr_mode' property to hsotg devices for exynos boards
[linux/fpc-iii.git] / drivers / net / bonding / bond_options.c
blob1a61cc9b3402b1e96e973cf88f5e51bb4d56bad2
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 <net/bonding.h>
20
21 static int bond_option_active_slave_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23 static int bond_option_miimon_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25 static int bond_option_updelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27 static int bond_option_downdelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29 static int bond_option_use_carrier_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31 static int bond_option_arp_interval_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
35 static int bond_option_arp_ip_targets_set(struct bonding *bond,
36 const struct bond_opt_value *newval);
37 static int bond_option_arp_validate_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_arp_all_targets_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_primary_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_primary_reselect_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_fail_over_mac_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_resend_igmp_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_num_peer_notif_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_all_slaves_active_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_min_links_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_lp_interval_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_pps_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_lacp_rate_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_ad_select_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_queue_id_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_mode_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_slaves_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73
74
75 static 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
86 static 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
92 static 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
101 static 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
112 static 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
118 static 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
125 static 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
131 static 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
137 static 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
144 static 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
151 static 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
158 static 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
164 static 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
170 static 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
177 static 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
183 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
184 { "off", 0, 0},
185 { "on", 1, BOND_VALFLAG_DEFAULT},
186 { NULL, -1, 0}
187 };
188
189 static const struct bond_option bond_opts[] = {
190 [BOND_OPT_MODE] = {
191 .id = BOND_OPT_MODE,
192 .name = "mode",
193 .desc = "bond device mode",
194 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
195 .values = bond_mode_tbl,
196 .set = bond_option_mode_set
197 },
198 [BOND_OPT_PACKETS_PER_SLAVE] = {
199 .id = BOND_OPT_PACKETS_PER_SLAVE,
200 .name = "packets_per_slave",
201 .desc = "Packets to send per slave in RR mode",
202 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
203 .values = bond_pps_tbl,
204 .set = bond_option_pps_set
205 },
206 [BOND_OPT_XMIT_HASH] = {
207 .id = BOND_OPT_XMIT_HASH,
208 .name = "xmit_hash_policy",
209 .desc = "balance-xor, 802.3ad, and tlb hashing method",
210 .values = bond_xmit_hashtype_tbl,
211 .set = bond_option_xmit_hash_policy_set
212 },
213 [BOND_OPT_ARP_VALIDATE] = {
214 .id = BOND_OPT_ARP_VALIDATE,
215 .name = "arp_validate",
216 .desc = "validate src/dst of ARP probes",
217 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
218 BIT(BOND_MODE_ALB),
219 .values = bond_arp_validate_tbl,
220 .set = bond_option_arp_validate_set
221 },
222 [BOND_OPT_ARP_ALL_TARGETS] = {
223 .id = BOND_OPT_ARP_ALL_TARGETS,
224 .name = "arp_all_targets",
225 .desc = "fail on any/all arp targets timeout",
226 .values = bond_arp_all_targets_tbl,
227 .set = bond_option_arp_all_targets_set
228 },
229 [BOND_OPT_FAIL_OVER_MAC] = {
230 .id = BOND_OPT_FAIL_OVER_MAC,
231 .name = "fail_over_mac",
232 .desc = "For active-backup, do not set all slaves to the same MAC",
233 .flags = BOND_OPTFLAG_NOSLAVES,
234 .values = bond_fail_over_mac_tbl,
235 .set = bond_option_fail_over_mac_set
236 },
237 [BOND_OPT_ARP_INTERVAL] = {
238 .id = BOND_OPT_ARP_INTERVAL,
239 .name = "arp_interval",
240 .desc = "arp interval in milliseconds",
241 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
242 BIT(BOND_MODE_ALB),
243 .values = bond_intmax_tbl,
244 .set = bond_option_arp_interval_set
245 },
246 [BOND_OPT_ARP_TARGETS] = {
247 .id = BOND_OPT_ARP_TARGETS,
248 .name = "arp_ip_target",
249 .desc = "arp targets in n.n.n.n form",
250 .flags = BOND_OPTFLAG_RAWVAL,
251 .set = bond_option_arp_ip_targets_set
252 },
253 [BOND_OPT_DOWNDELAY] = {
254 .id = BOND_OPT_DOWNDELAY,
255 .name = "downdelay",
256 .desc = "Delay before considering link down, in milliseconds",
257 .values = bond_intmax_tbl,
258 .set = bond_option_downdelay_set
259 },
260 [BOND_OPT_UPDELAY] = {
261 .id = BOND_OPT_UPDELAY,
262 .name = "updelay",
263 .desc = "Delay before considering link up, in milliseconds",
264 .values = bond_intmax_tbl,
265 .set = bond_option_updelay_set
266 },
267 [BOND_OPT_LACP_RATE] = {
268 .id = BOND_OPT_LACP_RATE,
269 .name = "lacp_rate",
270 .desc = "LACPDU tx rate to request from 802.3ad partner",
271 .flags = BOND_OPTFLAG_IFDOWN,
272 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
273 .values = bond_lacp_rate_tbl,
274 .set = bond_option_lacp_rate_set
275 },
276 [BOND_OPT_MINLINKS] = {
277 .id = BOND_OPT_MINLINKS,
278 .name = "min_links",
279 .desc = "Minimum number of available links before turning on carrier",
280 .values = bond_intmax_tbl,
281 .set = bond_option_min_links_set
282 },
283 [BOND_OPT_AD_SELECT] = {
284 .id = BOND_OPT_AD_SELECT,
285 .name = "ad_select",
286 .desc = "803.ad aggregation selection logic",
287 .flags = BOND_OPTFLAG_IFDOWN,
288 .values = bond_ad_select_tbl,
289 .set = bond_option_ad_select_set
290 },
291 [BOND_OPT_NUM_PEER_NOTIF] = {
292 .id = BOND_OPT_NUM_PEER_NOTIF,
293 .name = "num_unsol_na",
294 .desc = "Number of peer notifications to send on failover event",
295 .values = bond_num_peer_notif_tbl,
296 .set = bond_option_num_peer_notif_set
297 },
298 [BOND_OPT_MIIMON] = {
299 .id = BOND_OPT_MIIMON,
300 .name = "miimon",
301 .desc = "Link check interval in milliseconds",
302 .values = bond_intmax_tbl,
303 .set = bond_option_miimon_set
304 },
305 [BOND_OPT_PRIMARY] = {
306 .id = BOND_OPT_PRIMARY,
307 .name = "primary",
308 .desc = "Primary network device to use",
309 .flags = BOND_OPTFLAG_RAWVAL,
310 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
311 BIT(BOND_MODE_TLB) |
312 BIT(BOND_MODE_ALB)),
313 .set = bond_option_primary_set
314 },
315 [BOND_OPT_PRIMARY_RESELECT] = {
316 .id = BOND_OPT_PRIMARY_RESELECT,
317 .name = "primary_reselect",
318 .desc = "Reselect primary slave once it comes up",
319 .values = bond_primary_reselect_tbl,
320 .set = bond_option_primary_reselect_set
321 },
322 [BOND_OPT_USE_CARRIER] = {
323 .id = BOND_OPT_USE_CARRIER,
324 .name = "use_carrier",
325 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
326 .values = bond_use_carrier_tbl,
327 .set = bond_option_use_carrier_set
328 },
329 [BOND_OPT_ACTIVE_SLAVE] = {
330 .id = BOND_OPT_ACTIVE_SLAVE,
331 .name = "active_slave",
332 .desc = "Currently active slave",
333 .flags = BOND_OPTFLAG_RAWVAL,
334 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
335 BIT(BOND_MODE_TLB) |
336 BIT(BOND_MODE_ALB)),
337 .set = bond_option_active_slave_set
338 },
339 [BOND_OPT_QUEUE_ID] = {
340 .id = BOND_OPT_QUEUE_ID,
341 .name = "queue_id",
342 .desc = "Set queue id of a slave",
343 .flags = BOND_OPTFLAG_RAWVAL,
344 .set = bond_option_queue_id_set
345 },
346 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
347 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
348 .name = "all_slaves_active",
349 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
350 .values = bond_all_slaves_active_tbl,
351 .set = bond_option_all_slaves_active_set
352 },
353 [BOND_OPT_RESEND_IGMP] = {
354 .id = BOND_OPT_RESEND_IGMP,
355 .name = "resend_igmp",
356 .desc = "Number of IGMP membership reports to send on link failure",
357 .values = bond_resend_igmp_tbl,
358 .set = bond_option_resend_igmp_set
359 },
360 [BOND_OPT_LP_INTERVAL] = {
361 .id = BOND_OPT_LP_INTERVAL,
362 .name = "lp_interval",
363 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
364 .values = bond_lp_interval_tbl,
365 .set = bond_option_lp_interval_set
366 },
367 [BOND_OPT_SLAVES] = {
368 .id = BOND_OPT_SLAVES,
369 .name = "slaves",
370 .desc = "Slave membership management",
371 .flags = BOND_OPTFLAG_RAWVAL,
372 .set = bond_option_slaves_set
373 },
374 [BOND_OPT_TLB_DYNAMIC_LB] = {
375 .id = BOND_OPT_TLB_DYNAMIC_LB,
376 .name = "tlb_dynamic_lb",
377 .desc = "Enable dynamic flow shuffling",
378 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
379 .values = bond_tlb_dynamic_lb_tbl,
380 .flags = BOND_OPTFLAG_IFDOWN,
381 .set = bond_option_tlb_dynamic_lb_set,
382 },
383 { }
384 };
385
386 /* Searches for an option by name */
387 const struct bond_option *bond_opt_get_by_name(const char *name)
388 {
389 const struct bond_option *opt;
390 int option;
391
392 for (option = 0; option < BOND_OPT_LAST; option++) {
393 opt = bond_opt_get(option);
394 if (opt && !strcmp(opt->name, name))
395 return opt;
396 }
397
398 return NULL;
399 }
400
401 /* Searches for a value in opt's values[] table */
402 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
403 {
404 const struct bond_option *opt;
405 int i;
406
407 opt = bond_opt_get(option);
408 if (WARN_ON(!opt))
409 return NULL;
410 for (i = 0; opt->values && opt->values[i].string; i++)
411 if (opt->values[i].value == val)
412 return &opt->values[i];
413
414 return NULL;
415 }
416
417 /* Searches for a value in opt's values[] table which matches the flagmask */
418 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
419 u32 flagmask)
420 {
421 int i;
422
423 for (i = 0; opt->values && opt->values[i].string; i++)
424 if (opt->values[i].flags & flagmask)
425 return &opt->values[i];
426
427 return NULL;
428 }
429
430 /* If maxval is missing then there's no range to check. In case minval is
431 * missing then it's considered to be 0.
432 */
433 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
434 {
435 const struct bond_opt_value *minval, *maxval;
436
437 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
438 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
439 if (!maxval || (minval && val < minval->value) || val > maxval->value)
440 return false;
441
442 return true;
443 }
444
445 /**
446 * bond_opt_parse - parse option value
447 * @opt: the option to parse against
448 * @val: value to parse
449 *
450 * This function tries to extract the value from @val and check if it's
451 * a possible match for the option and returns NULL if a match isn't found,
452 * or the struct_opt_value that matched. It also strips the new line from
453 * @val->string if it's present.
454 */
455 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
456 struct bond_opt_value *val)
457 {
458 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
459 const struct bond_opt_value *tbl;
460 const struct bond_opt_value *ret = NULL;
461 bool checkval;
462 int i, rv;
463
464 /* No parsing if the option wants a raw val */
465 if (opt->flags & BOND_OPTFLAG_RAWVAL)
466 return val;
467
468 tbl = opt->values;
469 if (!tbl)
470 goto out;
471
472 /* ULLONG_MAX is used to bypass string processing */
473 checkval = val->value != ULLONG_MAX;
474 if (!checkval) {
475 if (!val->string)
476 goto out;
477 p = strchr(val->string, '\n');
478 if (p)
479 *p = '\0';
480 for (p = val->string; *p; p++)
481 if (!(isdigit(*p) || isspace(*p)))
482 break;
483 /* The following code extracts the string to match or the value
484 * and sets checkval appropriately
485 */
486 if (*p) {
487 rv = sscanf(val->string, "%32s", valstr);
488 } else {
489 rv = sscanf(val->string, "%llu", &val->value);
490 checkval = true;
491 }
492 if (!rv)
493 goto out;
494 }
495
496 for (i = 0; tbl[i].string; i++) {
497 /* Check for exact match */
498 if (checkval) {
499 if (val->value == tbl[i].value)
500 ret = &tbl[i];
501 } else {
502 if (!strcmp(valstr, "default") &&
503 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
504 ret = &tbl[i];
505
506 if (!strcmp(valstr, tbl[i].string))
507 ret = &tbl[i];
508 }
509 /* Found an exact match */
510 if (ret)
511 goto out;
512 }
513 /* Possible range match */
514 if (checkval && bond_opt_check_range(opt, val->value))
515 ret = val;
516 out:
517 return ret;
518 }
519
520 /* Check opt's dependencies against bond mode and currently set options */
521 static int bond_opt_check_deps(struct bonding *bond,
522 const struct bond_option *opt)
523 {
524 struct bond_params *params = &bond->params;
525
526 if (test_bit(params->mode, &opt->unsuppmodes))
527 return -EACCES;
528 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
529 return -ENOTEMPTY;
530 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
531 return -EBUSY;
532
533 return 0;
534 }
535
536 static void bond_opt_dep_print(struct bonding *bond,
537 const struct bond_option *opt)
538 {
539 const struct bond_opt_value *modeval;
540 struct bond_params *params;
541
542 params = &bond->params;
543 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
544 if (test_bit(params->mode, &opt->unsuppmodes))
545 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
546 opt->name, modeval->string, modeval->value);
547 }
548
549 static void bond_opt_error_interpret(struct bonding *bond,
550 const struct bond_option *opt,
551 int error, const struct bond_opt_value *val)
552 {
553 const struct bond_opt_value *minval, *maxval;
554 char *p;
555
556 switch (error) {
557 case -EINVAL:
558 if (val) {
559 if (val->string) {
560 /* sometimes RAWVAL opts may have new lines */
561 p = strchr(val->string, '\n');
562 if (p)
563 *p = '\0';
564 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
565 opt->name, val->string);
566 } else {
567 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
568 opt->name, val->value);
569 }
570 }
571 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
572 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
573 if (!maxval)
574 break;
575 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
576 opt->name, minval ? minval->value : 0, maxval->value);
577 break;
578 case -EACCES:
579 bond_opt_dep_print(bond, opt);
580 break;
581 case -ENOTEMPTY:
582 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
583 opt->name);
584 break;
585 case -EBUSY:
586 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
587 opt->name);
588 break;
589 default:
590 break;
591 }
592 }
593
594 /**
595 * __bond_opt_set - set a bonding option
596 * @bond: target bond device
597 * @option: option to set
598 * @val: value to set it to
599 *
600 * This function is used to change the bond's option value, it can be
601 * used for both enabling/changing an option and for disabling it. RTNL lock
602 * must be obtained before calling this function.
603 */
604 int __bond_opt_set(struct bonding *bond,
605 unsigned int option, struct bond_opt_value *val)
606 {
607 const struct bond_opt_value *retval = NULL;
608 const struct bond_option *opt;
609 int ret = -ENOENT;
610
611 ASSERT_RTNL();
612
613 opt = bond_opt_get(option);
614 if (WARN_ON(!val) || WARN_ON(!opt))
615 goto out;
616 ret = bond_opt_check_deps(bond, opt);
617 if (ret)
618 goto out;
619 retval = bond_opt_parse(opt, val);
620 if (!retval) {
621 ret = -EINVAL;
622 goto out;
623 }
624 ret = opt->set(bond, retval);
625 out:
626 if (ret)
627 bond_opt_error_interpret(bond, opt, ret, val);
628 else
629 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
630
631 return ret;
632 }
633
634 /**
635 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
636 * @bond: target bond device
637 * @option: option to set
638 * @buf: value to set it to
639 *
640 * This function tries to acquire RTNL without blocking and if successful
641 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
642 */
643 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
644 {
645 struct bond_opt_value optval;
646 int ret;
647
648 if (!rtnl_trylock())
649 return restart_syscall();
650 bond_opt_initstr(&optval, buf);
651 ret = __bond_opt_set(bond, option, &optval);
652 rtnl_unlock();
653
654 return ret;
655 }
656
657 /**
658 * bond_opt_get - get a pointer to an option
659 * @option: option for which to return a pointer
660 *
661 * This function checks if option is valid and if so returns a pointer
662 * to its entry in the bond_opts[] option array.
663 */
664 const struct bond_option *bond_opt_get(unsigned int option)
665 {
666 if (!BOND_OPT_VALID(option))
667 return NULL;
668
669 return &bond_opts[option];
670 }
671
672 static int bond_option_mode_set(struct bonding *bond,
673 const struct bond_opt_value *newval)
674 {
675 if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
676 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
677 newval->string);
678 /* disable arp monitoring */
679 bond->params.arp_interval = 0;
680 /* set miimon to default value */
681 bond->params.miimon = BOND_DEFAULT_MIIMON;
682 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
683 bond->params.miimon);
684 }
685
686 /* don't cache arp_validate between modes */
687 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
688 bond->params.mode = newval->value;
689
690 return 0;
691 }
692
693 static struct net_device *__bond_option_active_slave_get(struct bonding *bond,
694 struct slave *slave)
695 {
696 return bond_uses_primary(bond) && slave ? slave->dev : NULL;
697 }
698
699 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond)
700 {
701 struct slave *slave = rcu_dereference(bond->curr_active_slave);
702
703 return __bond_option_active_slave_get(bond, slave);
704 }
705
706 static int bond_option_active_slave_set(struct bonding *bond,
707 const struct bond_opt_value *newval)
708 {
709 char ifname[IFNAMSIZ] = { 0, };
710 struct net_device *slave_dev;
711 int ret = 0;
712
713 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
714 if (!strlen(ifname) || newval->string[0] == '\n') {
715 slave_dev = NULL;
716 } else {
717 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
718 if (!slave_dev)
719 return -ENODEV;
720 }
721
722 if (slave_dev) {
723 if (!netif_is_bond_slave(slave_dev)) {
724 netdev_err(bond->dev, "Device %s is not bonding slave\n",
725 slave_dev->name);
726 return -EINVAL;
727 }
728
729 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
730 netdev_err(bond->dev, "Device %s is not our slave\n",
731 slave_dev->name);
732 return -EINVAL;
733 }
734 }
735
736 block_netpoll_tx();
737 /* check to see if we are clearing active */
738 if (!slave_dev) {
739 netdev_info(bond->dev, "Clearing current active slave\n");
740 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
741 bond_select_active_slave(bond);
742 } else {
743 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
744 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
745
746 BUG_ON(!new_active);
747
748 if (new_active == old_active) {
749 /* do nothing */
750 netdev_info(bond->dev, "%s is already the current active slave\n",
751 new_active->dev->name);
752 } else {
753 if (old_active && (new_active->link == BOND_LINK_UP) &&
754 bond_slave_is_up(new_active)) {
755 netdev_info(bond->dev, "Setting %s as active slave\n",
756 new_active->dev->name);
757 bond_change_active_slave(bond, new_active);
758 } else {
759 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
760 new_active->dev->name,
761 new_active->dev->name);
762 ret = -EINVAL;
763 }
764 }
765 }
766 unblock_netpoll_tx();
767
768 return ret;
769 }
770
771 /* There are two tricky bits here. First, if MII monitoring is activated, then
772 * we must disable ARP monitoring. Second, if the timer isn't running, we must
773 * start it.
774 */
775 static int bond_option_miimon_set(struct bonding *bond,
776 const struct bond_opt_value *newval)
777 {
778 netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
779 newval->value);
780 bond->params.miimon = newval->value;
781 if (bond->params.updelay)
782 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
783 bond->params.updelay * bond->params.miimon);
784 if (bond->params.downdelay)
785 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
786 bond->params.downdelay * bond->params.miimon);
787 if (newval->value && bond->params.arp_interval) {
788 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
789 bond->params.arp_interval = 0;
790 if (bond->params.arp_validate)
791 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
792 }
793 if (bond->dev->flags & IFF_UP) {
794 /* If the interface is up, we may need to fire off
795 * the MII timer. If the interface is down, the
796 * timer will get fired off when the open function
797 * is called.
798 */
799 if (!newval->value) {
800 cancel_delayed_work_sync(&bond->mii_work);
801 } else {
802 cancel_delayed_work_sync(&bond->arp_work);
803 queue_delayed_work(bond->wq, &bond->mii_work, 0);
804 }
805 }
806
807 return 0;
808 }
809
810 /* Set up and down delays. These must be multiples of the
811 * MII monitoring value, and are stored internally as the multiplier.
812 * Thus, we must translate to MS for the real world.
813 */
814 static int bond_option_updelay_set(struct bonding *bond,
815 const struct bond_opt_value *newval)
816 {
817 int value = newval->value;
818
819 if (!bond->params.miimon) {
820 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
821 return -EPERM;
822 }
823 if ((value % bond->params.miimon) != 0) {
824 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
825 value, bond->params.miimon,
826 (value / bond->params.miimon) *
827 bond->params.miimon);
828 }
829 bond->params.updelay = value / bond->params.miimon;
830 netdev_info(bond->dev, "Setting up delay to %d\n",
831 bond->params.updelay * bond->params.miimon);
832
833 return 0;
834 }
835
836 static int bond_option_downdelay_set(struct bonding *bond,
837 const struct bond_opt_value *newval)
838 {
839 int value = newval->value;
840
841 if (!bond->params.miimon) {
842 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
843 return -EPERM;
844 }
845 if ((value % bond->params.miimon) != 0) {
846 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
847 value, bond->params.miimon,
848 (value / bond->params.miimon) *
849 bond->params.miimon);
850 }
851 bond->params.downdelay = value / bond->params.miimon;
852 netdev_info(bond->dev, "Setting down delay to %d\n",
853 bond->params.downdelay * bond->params.miimon);
854
855 return 0;
856 }
857
858 static int bond_option_use_carrier_set(struct bonding *bond,
859 const struct bond_opt_value *newval)
860 {
861 netdev_info(bond->dev, "Setting use_carrier to %llu\n",
862 newval->value);
863 bond->params.use_carrier = newval->value;
864
865 return 0;
866 }
867
868 /* There are two tricky bits here. First, if ARP monitoring is activated, then
869 * we must disable MII monitoring. Second, if the ARP timer isn't running,
870 * we must start it.
871 */
872 static int bond_option_arp_interval_set(struct bonding *bond,
873 const struct bond_opt_value *newval)
874 {
875 netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
876 newval->value);
877 bond->params.arp_interval = newval->value;
878 if (newval->value) {
879 if (bond->params.miimon) {
880 netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
881 bond->params.miimon = 0;
882 }
883 if (!bond->params.arp_targets[0])
884 netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
885 }
886 if (bond->dev->flags & IFF_UP) {
887 /* If the interface is up, we may need to fire off
888 * the ARP timer. If the interface is down, the
889 * timer will get fired off when the open function
890 * is called.
891 */
892 if (!newval->value) {
893 if (bond->params.arp_validate)
894 bond->recv_probe = NULL;
895 cancel_delayed_work_sync(&bond->arp_work);
896 } else {
897 /* arp_validate can be set only in active-backup mode */
898 bond->recv_probe = bond_arp_rcv;
899 cancel_delayed_work_sync(&bond->mii_work);
900 queue_delayed_work(bond->wq, &bond->arp_work, 0);
901 }
902 }
903
904 return 0;
905 }
906
907 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
908 __be32 target,
909 unsigned long last_rx)
910 {
911 __be32 *targets = bond->params.arp_targets;
912 struct list_head *iter;
913 struct slave *slave;
914
915 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
916 bond_for_each_slave(bond, slave, iter)
917 slave->target_last_arp_rx[slot] = last_rx;
918 targets[slot] = target;
919 }
920 }
921
922 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
923 {
924 __be32 *targets = bond->params.arp_targets;
925 int ind;
926
927 if (!bond_is_ip_target_ok(target)) {
928 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
929 &target);
930 return -EINVAL;
931 }
932
933 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
934 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
935 &target);
936 return -EINVAL;
937 }
938
939 ind = bond_get_targets_ip(targets, 0); /* first free slot */
940 if (ind == -1) {
941 netdev_err(bond->dev, "ARP target table is full!\n");
942 return -EINVAL;
943 }
944
945 netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
946
947 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
948
949 return 0;
950 }
951
952 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
953 {
954 return _bond_option_arp_ip_target_add(bond, target);
955 }
956
957 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
958 {
959 __be32 *targets = bond->params.arp_targets;
960 struct list_head *iter;
961 struct slave *slave;
962 unsigned long *targets_rx;
963 int ind, i;
964
965 if (!bond_is_ip_target_ok(target)) {
966 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
967 &target);
968 return -EINVAL;
969 }
970
971 ind = bond_get_targets_ip(targets, target);
972 if (ind == -1) {
973 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
974 &target);
975 return -EINVAL;
976 }
977
978 if (ind == 0 && !targets[1] && bond->params.arp_interval)
979 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
980
981 netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
982
983 bond_for_each_slave(bond, slave, iter) {
984 targets_rx = slave->target_last_arp_rx;
985 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
986 targets_rx[i] = targets_rx[i+1];
987 targets_rx[i] = 0;
988 }
989 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
990 targets[i] = targets[i+1];
991 targets[i] = 0;
992
993 return 0;
994 }
995
996 void bond_option_arp_ip_targets_clear(struct bonding *bond)
997 {
998 int i;
999
1000 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1001 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1002 }
1003
1004 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1005 const struct bond_opt_value *newval)
1006 {
1007 int ret = -EPERM;
1008 __be32 target;
1009
1010 if (newval->string) {
1011 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1012 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1013 &target);
1014 return ret;
1015 }
1016 if (newval->string[0] == '+')
1017 ret = bond_option_arp_ip_target_add(bond, target);
1018 else if (newval->string[0] == '-')
1019 ret = bond_option_arp_ip_target_rem(bond, target);
1020 else
1021 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1022 } else {
1023 target = newval->value;
1024 ret = bond_option_arp_ip_target_add(bond, target);
1025 }
1026
1027 return ret;
1028 }
1029
1030 static int bond_option_arp_validate_set(struct bonding *bond,
1031 const struct bond_opt_value *newval)
1032 {
1033 netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1034 newval->string, newval->value);
1035
1036 if (bond->dev->flags & IFF_UP) {
1037 if (!newval->value)
1038 bond->recv_probe = NULL;
1039 else if (bond->params.arp_interval)
1040 bond->recv_probe = bond_arp_rcv;
1041 }
1042 bond->params.arp_validate = newval->value;
1043
1044 return 0;
1045 }
1046
1047 static int bond_option_arp_all_targets_set(struct bonding *bond,
1048 const struct bond_opt_value *newval)
1049 {
1050 netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1051 newval->string, newval->value);
1052 bond->params.arp_all_targets = newval->value;
1053
1054 return 0;
1055 }
1056
1057 static int bond_option_primary_set(struct bonding *bond,
1058 const struct bond_opt_value *newval)
1059 {
1060 char *p, *primary = newval->string;
1061 struct list_head *iter;
1062 struct slave *slave;
1063
1064 block_netpoll_tx();
1065
1066 p = strchr(primary, '\n');
1067 if (p)
1068 *p = '\0';
1069 /* check to see if we are clearing primary */
1070 if (!strlen(primary)) {
1071 netdev_info(bond->dev, "Setting primary slave to None\n");
1072 RCU_INIT_POINTER(bond->primary_slave, NULL);
1073 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1074 bond_select_active_slave(bond);
1075 goto out;
1076 }
1077
1078 bond_for_each_slave(bond, slave, iter) {
1079 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1080 netdev_info(bond->dev, "Setting %s as primary slave\n",
1081 slave->dev->name);
1082 rcu_assign_pointer(bond->primary_slave, slave);
1083 strcpy(bond->params.primary, slave->dev->name);
1084 bond_select_active_slave(bond);
1085 goto out;
1086 }
1087 }
1088
1089 if (rtnl_dereference(bond->primary_slave)) {
1090 netdev_info(bond->dev, "Setting primary slave to None\n");
1091 RCU_INIT_POINTER(bond->primary_slave, NULL);
1092 bond_select_active_slave(bond);
1093 }
1094 strncpy(bond->params.primary, primary, IFNAMSIZ);
1095 bond->params.primary[IFNAMSIZ - 1] = 0;
1096
1097 netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1098 primary, bond->dev->name);
1099
1100 out:
1101 unblock_netpoll_tx();
1102
1103 return 0;
1104 }
1105
1106 static int bond_option_primary_reselect_set(struct bonding *bond,
1107 const struct bond_opt_value *newval)
1108 {
1109 netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1110 newval->string, newval->value);
1111 bond->params.primary_reselect = newval->value;
1112
1113 block_netpoll_tx();
1114 bond_select_active_slave(bond);
1115 unblock_netpoll_tx();
1116
1117 return 0;
1118 }
1119
1120 static int bond_option_fail_over_mac_set(struct bonding *bond,
1121 const struct bond_opt_value *newval)
1122 {
1123 netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1124 newval->string, newval->value);
1125 bond->params.fail_over_mac = newval->value;
1126
1127 return 0;
1128 }
1129
1130 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1131 const struct bond_opt_value *newval)
1132 {
1133 netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1134 newval->string, newval->value);
1135 bond->params.xmit_policy = newval->value;
1136
1137 return 0;
1138 }
1139
1140 static int bond_option_resend_igmp_set(struct bonding *bond,
1141 const struct bond_opt_value *newval)
1142 {
1143 netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1144 newval->value);
1145 bond->params.resend_igmp = newval->value;
1146
1147 return 0;
1148 }
1149
1150 static int bond_option_num_peer_notif_set(struct bonding *bond,
1151 const struct bond_opt_value *newval)
1152 {
1153 bond->params.num_peer_notif = newval->value;
1154
1155 return 0;
1156 }
1157
1158 static int bond_option_all_slaves_active_set(struct bonding *bond,
1159 const struct bond_opt_value *newval)
1160 {
1161 struct list_head *iter;
1162 struct slave *slave;
1163
1164 if (newval->value == bond->params.all_slaves_active)
1165 return 0;
1166 bond->params.all_slaves_active = newval->value;
1167 bond_for_each_slave(bond, slave, iter) {
1168 if (!bond_is_active_slave(slave)) {
1169 if (newval->value)
1170 slave->inactive = 0;
1171 else
1172 slave->inactive = 1;
1173 }
1174 }
1175
1176 return 0;
1177 }
1178
1179 static int bond_option_min_links_set(struct bonding *bond,
1180 const struct bond_opt_value *newval)
1181 {
1182 netdev_info(bond->dev, "Setting min links value to %llu\n",
1183 newval->value);
1184 bond->params.min_links = newval->value;
1185
1186 return 0;
1187 }
1188
1189 static int bond_option_lp_interval_set(struct bonding *bond,
1190 const struct bond_opt_value *newval)
1191 {
1192 bond->params.lp_interval = newval->value;
1193
1194 return 0;
1195 }
1196
1197 static int bond_option_pps_set(struct bonding *bond,
1198 const struct bond_opt_value *newval)
1199 {
1200 bond->params.packets_per_slave = newval->value;
1201 if (newval->value > 0) {
1202 bond->params.reciprocal_packets_per_slave =
1203 reciprocal_value(newval->value);
1204 } else {
1205 /* reciprocal_packets_per_slave is unused if
1206 * packets_per_slave is 0 or 1, just initialize it
1207 */
1208 bond->params.reciprocal_packets_per_slave =
1209 (struct reciprocal_value) { 0 };
1210 }
1211
1212 return 0;
1213 }
1214
1215 static int bond_option_lacp_rate_set(struct bonding *bond,
1216 const struct bond_opt_value *newval)
1217 {
1218 netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1219 newval->string, newval->value);
1220 bond->params.lacp_fast = newval->value;
1221 bond_3ad_update_lacp_rate(bond);
1222
1223 return 0;
1224 }
1225
1226 static int bond_option_ad_select_set(struct bonding *bond,
1227 const struct bond_opt_value *newval)
1228 {
1229 netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1230 newval->string, newval->value);
1231 bond->params.ad_select = newval->value;
1232
1233 return 0;
1234 }
1235
1236 static int bond_option_queue_id_set(struct bonding *bond,
1237 const struct bond_opt_value *newval)
1238 {
1239 struct slave *slave, *update_slave;
1240 struct net_device *sdev;
1241 struct list_head *iter;
1242 char *delim;
1243 int ret = 0;
1244 u16 qid;
1245
1246 /* delim will point to queue id if successful */
1247 delim = strchr(newval->string, ':');
1248 if (!delim)
1249 goto err_no_cmd;
1250
1251 /* Terminate string that points to device name and bump it
1252 * up one, so we can read the queue id there.
1253 */
1254 *delim = '\0';
1255 if (sscanf(++delim, "%hd\n", &qid) != 1)
1256 goto err_no_cmd;
1257
1258 /* Check buffer length, valid ifname and queue id */
1259 if (!dev_valid_name(newval->string) ||
1260 qid > bond->dev->real_num_tx_queues)
1261 goto err_no_cmd;
1262
1263 /* Get the pointer to that interface if it exists */
1264 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1265 if (!sdev)
1266 goto err_no_cmd;
1267
1268 /* Search for thes slave and check for duplicate qids */
1269 update_slave = NULL;
1270 bond_for_each_slave(bond, slave, iter) {
1271 if (sdev == slave->dev)
1272 /* We don't need to check the matching
1273 * slave for dups, since we're overwriting it
1274 */
1275 update_slave = slave;
1276 else if (qid && qid == slave->queue_id) {
1277 goto err_no_cmd;
1278 }
1279 }
1280
1281 if (!update_slave)
1282 goto err_no_cmd;
1283
1284 /* Actually set the qids for the slave */
1285 update_slave->queue_id = qid;
1286
1287 out:
1288 return ret;
1289
1290 err_no_cmd:
1291 netdev_info(bond->dev, "invalid input for queue_id set\n");
1292 ret = -EPERM;
1293 goto out;
1294
1295 }
1296
1297 static int bond_option_slaves_set(struct bonding *bond,
1298 const struct bond_opt_value *newval)
1299 {
1300 char command[IFNAMSIZ + 1] = { 0, };
1301 struct net_device *dev;
1302 char *ifname;
1303 int ret;
1304
1305 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1306 ifname = command + 1;
1307 if ((strlen(command) <= 1) ||
1308 !dev_valid_name(ifname))
1309 goto err_no_cmd;
1310
1311 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1312 if (!dev) {
1313 netdev_info(bond->dev, "interface %s does not exist!\n",
1314 ifname);
1315 ret = -ENODEV;
1316 goto out;
1317 }
1318
1319 switch (command[0]) {
1320 case '+':
1321 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1322 ret = bond_enslave(bond->dev, dev);
1323 break;
1324
1325 case '-':
1326 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1327 ret = bond_release(bond->dev, dev);
1328 break;
1329
1330 default:
1331 goto err_no_cmd;
1332 }
1333
1334 out:
1335 return ret;
1336
1337 err_no_cmd:
1338 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1339 ret = -EPERM;
1340 goto out;
1341 }
1342
1343 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1344 const struct bond_opt_value *newval)
1345 {
1346 netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1347 newval->string, newval->value);
1348 bond->params.tlb_dynamic_lb = newval->value;
1349
1350 return 0;
1351 }
Linux with added FPC-III support