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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#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
21static int bond_option_active_slave_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23static int bond_option_miimon_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25static int bond_option_updelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27static int bond_option_downdelay_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)),
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};
431
432/* Searches for an option by name */
433const struct bond_option *bond_opt_get_by_name(const char *name)
434{
435 const struct bond_option *opt;
436 int option;
437
438 for (option = 0; option < BOND_OPT_LAST; option++) {
439 opt = bond_opt_get(option);
440 if (opt && !strcmp(opt->name, name))
441 return opt;
442 }
443
444 return NULL;
445}
446
447/* Searches for a value in opt's values[] table */
448const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
449{
450 const struct bond_option *opt;
451 int i;
452
453 opt = bond_opt_get(option);
454 if (WARN_ON(!opt))
455 return NULL;
456 for (i = 0; opt->values && opt->values[i].string; i++)
457 if (opt->values[i].value == val)
458 return &opt->values[i];
459
460 return NULL;
461}
462
463/* Searches for a value in opt's values[] table which matches the flagmask */
464static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
465 u32 flagmask)
466{
467 int i;
468
469 for (i = 0; opt->values && opt->values[i].string; i++)
470 if (opt->values[i].flags & flagmask)
471 return &opt->values[i];
472
473 return NULL;
474}
475
476/* If maxval is missing then there's no range to check. In case minval is
477 * missing then it's considered to be 0.
478 */
479static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
480{
481 const struct bond_opt_value *minval, *maxval;
482
483 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
484 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
485 if (!maxval || (minval && val < minval->value) || val > maxval->value)
486 return false;
487
488 return true;
489}
490
491/**
492 * bond_opt_parse - parse option value
493 * @opt: the option to parse against
494 * @val: value to parse
495 *
496 * This function tries to extract the value from @val and check if it's
497 * a possible match for the option and returns NULL if a match isn't found,
498 * or the struct_opt_value that matched. It also strips the new line from
499 * @val->string if it's present.
500 */
501const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
502 struct bond_opt_value *val)
503{
504 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
505 const struct bond_opt_value *tbl;
506 const struct bond_opt_value *ret = NULL;
507 bool checkval;
508 int i, rv;
509
510 /* No parsing if the option wants a raw val */
511 if (opt->flags & BOND_OPTFLAG_RAWVAL)
512 return val;
513
514 tbl = opt->values;
515 if (!tbl)
516 goto out;
517
518 /* ULLONG_MAX is used to bypass string processing */
519 checkval = val->value != ULLONG_MAX;
520 if (!checkval) {
521 if (!val->string)
522 goto out;
523 p = strchr(val->string, '\n');
524 if (p)
525 *p = '\0';
526 for (p = val->string; *p; p++)
527 if (!(isdigit(*p) || isspace(*p)))
528 break;
529 /* The following code extracts the string to match or the value
530 * and sets checkval appropriately
531 */
532 if (*p) {
533 rv = sscanf(val->string, "%32s", valstr);
534 } else {
535 rv = sscanf(val->string, "%llu", &val->value);
536 checkval = true;
537 }
538 if (!rv)
539 goto out;
540 }
541
542 for (i = 0; tbl[i].string; i++) {
543 /* Check for exact match */
544 if (checkval) {
545 if (val->value == tbl[i].value)
546 ret = &tbl[i];
547 } else {
548 if (!strcmp(valstr, "default") &&
549 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
550 ret = &tbl[i];
551
552 if (!strcmp(valstr, tbl[i].string))
553 ret = &tbl[i];
554 }
555 /* Found an exact match */
556 if (ret)
557 goto out;
558 }
559 /* Possible range match */
560 if (checkval && bond_opt_check_range(opt, val->value))
561 ret = val;
562out:
563 return ret;
564}
565
566/* Check opt's dependencies against bond mode and currently set options */
567static int bond_opt_check_deps(struct bonding *bond,
568 const struct bond_option *opt)
569{
570 struct bond_params *params = &bond->params;
571
572 if (test_bit(params->mode, &opt->unsuppmodes))
573 return -EACCES;
574 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
575 return -ENOTEMPTY;
576 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
577 return -EBUSY;
578
579 return 0;
580}
581
582static void bond_opt_dep_print(struct bonding *bond,
583 const struct bond_option *opt)
584{
585 const struct bond_opt_value *modeval;
586 struct bond_params *params;
587
588 params = &bond->params;
589 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
590 if (test_bit(params->mode, &opt->unsuppmodes))
591 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
592 opt->name, modeval->string, modeval->value);
593}
594
595static void bond_opt_error_interpret(struct bonding *bond,
596 const struct bond_option *opt,
597 int error, const struct bond_opt_value *val)
598{
599 const struct bond_opt_value *minval, *maxval;
600 char *p;
601
602 switch (error) {
603 case -EINVAL:
604 if (val) {
605 if (val->string) {
606 /* sometimes RAWVAL opts may have new lines */
607 p = strchr(val->string, '\n');
608 if (p)
609 *p = '\0';
610 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
611 opt->name, val->string);
612 } else {
613 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
614 opt->name, val->value);
615 }
616 }
617 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
618 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
619 if (!maxval)
620 break;
621 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
622 opt->name, minval ? minval->value : 0, maxval->value);
623 break;
624 case -EACCES:
625 bond_opt_dep_print(bond, opt);
626 break;
627 case -ENOTEMPTY:
628 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
629 opt->name);
630 break;
631 case -EBUSY:
632 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
633 opt->name);
634 break;
635 default:
636 break;
637 }
638}
639
640/**
641 * __bond_opt_set - set a bonding option
642 * @bond: target bond device
643 * @option: option to set
644 * @val: value to set it to
645 *
646 * This function is used to change the bond's option value, it can be
647 * used for both enabling/changing an option and for disabling it. RTNL lock
648 * must be obtained before calling this function.
649 */
650int __bond_opt_set(struct bonding *bond,
651 unsigned int option, struct bond_opt_value *val)
652{
653 const struct bond_opt_value *retval = NULL;
654 const struct bond_option *opt;
655 int ret = -ENOENT;
656
657 ASSERT_RTNL();
658
659 opt = bond_opt_get(option);
660 if (WARN_ON(!val) || WARN_ON(!opt))
661 goto out;
662 ret = bond_opt_check_deps(bond, opt);
663 if (ret)
664 goto out;
665 retval = bond_opt_parse(opt, val);
666 if (!retval) {
667 ret = -EINVAL;
668 goto out;
669 }
670 ret = opt->set(bond, retval);
671out:
672 if (ret)
673 bond_opt_error_interpret(bond, opt, ret, val);
674 else if (bond->dev->reg_state == NETREG_REGISTERED)
675 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
676
677 return ret;
678}
679
680/**
681 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
682 * @bond: target bond device
683 * @option: option to set
684 * @buf: value to set it to
685 *
686 * This function tries to acquire RTNL without blocking and if successful
687 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
688 */
689int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
690{
691 struct bond_opt_value optval;
692 int ret;
693
694 if (!rtnl_trylock())
695 return restart_syscall();
696 bond_opt_initstr(&optval, buf);
697 ret = __bond_opt_set(bond, option, &optval);
698 rtnl_unlock();
699
700 return ret;
701}
702
703/**
704 * bond_opt_get - get a pointer to an option
705 * @option: option for which to return a pointer
706 *
707 * This function checks if option is valid and if so returns a pointer
708 * to its entry in the bond_opts[] option array.
709 */
710const struct bond_option *bond_opt_get(unsigned int option)
711{
712 if (!BOND_OPT_VALID(option))
713 return NULL;
714
715 return &bond_opts[option];
716}
717
718static int bond_option_mode_set(struct bonding *bond,
719 const struct bond_opt_value *newval)
720{
721 if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
722 netdev_info(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
723 newval->string);
724 /* disable arp monitoring */
725 bond->params.arp_interval = 0;
726 /* set miimon to default value */
727 bond->params.miimon = BOND_DEFAULT_MIIMON;
728 netdev_info(bond->dev, "Setting MII monitoring interval to %d\n",
729 bond->params.miimon);
730 }
731
732 /* don't cache arp_validate between modes */
733 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
734 bond->params.mode = newval->value;
735
736 return 0;
737}
738
739static int bond_option_active_slave_set(struct bonding *bond,
740 const struct bond_opt_value *newval)
741{
742 char ifname[IFNAMSIZ] = { 0, };
743 struct net_device *slave_dev;
744 int ret = 0;
745
746 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
747 if (!strlen(ifname) || newval->string[0] == '\n') {
748 slave_dev = NULL;
749 } else {
750 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
751 if (!slave_dev)
752 return -ENODEV;
753 }
754
755 if (slave_dev) {
756 if (!netif_is_bond_slave(slave_dev)) {
757 netdev_err(bond->dev, "Device %s is not bonding slave\n",
758 slave_dev->name);
759 return -EINVAL;
760 }
761
762 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
763 netdev_err(bond->dev, "Device %s is not our slave\n",
764 slave_dev->name);
765 return -EINVAL;
766 }
767 }
768
769 block_netpoll_tx();
770 /* check to see if we are clearing active */
771 if (!slave_dev) {
772 netdev_info(bond->dev, "Clearing current active slave\n");
773 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
774 bond_select_active_slave(bond);
775 } else {
776 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
777 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
778
779 BUG_ON(!new_active);
780
781 if (new_active == old_active) {
782 /* do nothing */
783 netdev_info(bond->dev, "%s is already the current active slave\n",
784 new_active->dev->name);
785 } else {
786 if (old_active && (new_active->link == BOND_LINK_UP) &&
787 bond_slave_is_up(new_active)) {
788 netdev_info(bond->dev, "Setting %s as active slave\n",
789 new_active->dev->name);
790 bond_change_active_slave(bond, new_active);
791 } else {
792 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
793 new_active->dev->name,
794 new_active->dev->name);
795 ret = -EINVAL;
796 }
797 }
798 }
799 unblock_netpoll_tx();
800
801 return ret;
802}
803
804/* There are two tricky bits here. First, if MII monitoring is activated, then
805 * we must disable ARP monitoring. Second, if the timer isn't running, we must
806 * start it.
807 */
808static int bond_option_miimon_set(struct bonding *bond,
809 const struct bond_opt_value *newval)
810{
811 netdev_info(bond->dev, "Setting MII monitoring interval to %llu\n",
812 newval->value);
813 bond->params.miimon = newval->value;
814 if (bond->params.updelay)
815 netdev_info(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
816 bond->params.updelay * bond->params.miimon);
817 if (bond->params.downdelay)
818 netdev_info(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
819 bond->params.downdelay * bond->params.miimon);
820 if (newval->value && bond->params.arp_interval) {
821 netdev_info(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
822 bond->params.arp_interval = 0;
823 if (bond->params.arp_validate)
824 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
825 }
826 if (bond->dev->flags & IFF_UP) {
827 /* If the interface is up, we may need to fire off
828 * the MII timer. If the interface is down, the
829 * timer will get fired off when the open function
830 * is called.
831 */
832 if (!newval->value) {
833 cancel_delayed_work_sync(&bond->mii_work);
834 } else {
835 cancel_delayed_work_sync(&bond->arp_work);
836 queue_delayed_work(bond->wq, &bond->mii_work, 0);
837 }
838 }
839
840 return 0;
841}
842
843/* Set up and down delays. These must be multiples of the
844 * MII monitoring value, and are stored internally as the multiplier.
845 * Thus, we must translate to MS for the real world.
846 */
847static int bond_option_updelay_set(struct bonding *bond,
848 const struct bond_opt_value *newval)
849{
850 int value = newval->value;
851
852 if (!bond->params.miimon) {
853 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
854 return -EPERM;
855 }
856 if ((value % bond->params.miimon) != 0) {
857 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
858 value, bond->params.miimon,
859 (value / bond->params.miimon) *
860 bond->params.miimon);
861 }
862 bond->params.updelay = value / bond->params.miimon;
863 netdev_info(bond->dev, "Setting up delay to %d\n",
864 bond->params.updelay * bond->params.miimon);
865
866 return 0;
867}
868
869static int bond_option_downdelay_set(struct bonding *bond,
870 const struct bond_opt_value *newval)
871{
872 int value = newval->value;
873
874 if (!bond->params.miimon) {
875 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
876 return -EPERM;
877 }
878 if ((value % bond->params.miimon) != 0) {
879 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
880 value, bond->params.miimon,
881 (value / bond->params.miimon) *
882 bond->params.miimon);
883 }
884 bond->params.downdelay = value / bond->params.miimon;
885 netdev_info(bond->dev, "Setting down delay to %d\n",
886 bond->params.downdelay * bond->params.miimon);
887
888 return 0;
889}
890
891static int bond_option_use_carrier_set(struct bonding *bond,
892 const struct bond_opt_value *newval)
893{
894 netdev_info(bond->dev, "Setting use_carrier to %llu\n",
895 newval->value);
896 bond->params.use_carrier = newval->value;
897
898 return 0;
899}
900
901/* There are two tricky bits here. First, if ARP monitoring is activated, then
902 * we must disable MII monitoring. Second, if the ARP timer isn't running,
903 * we must start it.
904 */
905static int bond_option_arp_interval_set(struct bonding *bond,
906 const struct bond_opt_value *newval)
907{
908 netdev_info(bond->dev, "Setting ARP monitoring interval to %llu\n",
909 newval->value);
910 bond->params.arp_interval = newval->value;
911 if (newval->value) {
912 if (bond->params.miimon) {
913 netdev_info(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
914 bond->params.miimon = 0;
915 }
916 if (!bond->params.arp_targets[0])
917 netdev_info(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
918 }
919 if (bond->dev->flags & IFF_UP) {
920 /* If the interface is up, we may need to fire off
921 * the ARP timer. If the interface is down, the
922 * timer will get fired off when the open function
923 * is called.
924 */
925 if (!newval->value) {
926 if (bond->params.arp_validate)
927 bond->recv_probe = NULL;
928 cancel_delayed_work_sync(&bond->arp_work);
929 } else {
930 /* arp_validate can be set only in active-backup mode */
931 bond->recv_probe = bond_arp_rcv;
932 cancel_delayed_work_sync(&bond->mii_work);
933 queue_delayed_work(bond->wq, &bond->arp_work, 0);
934 }
935 }
936
937 return 0;
938}
939
940static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
941 __be32 target,
942 unsigned long last_rx)
943{
944 __be32 *targets = bond->params.arp_targets;
945 struct list_head *iter;
946 struct slave *slave;
947
948 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
949 bond_for_each_slave(bond, slave, iter)
950 slave->target_last_arp_rx[slot] = last_rx;
951 targets[slot] = target;
952 }
953}
954
955static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
956{
957 __be32 *targets = bond->params.arp_targets;
958 int ind;
959
960 if (!bond_is_ip_target_ok(target)) {
961 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
962 &target);
963 return -EINVAL;
964 }
965
966 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
967 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
968 &target);
969 return -EINVAL;
970 }
971
972 ind = bond_get_targets_ip(targets, 0); /* first free slot */
973 if (ind == -1) {
974 netdev_err(bond->dev, "ARP target table is full!\n");
975 return -EINVAL;
976 }
977
978 netdev_info(bond->dev, "Adding ARP target %pI4\n", &target);
979
980 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
981
982 return 0;
983}
984
985static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
986{
987 return _bond_option_arp_ip_target_add(bond, target);
988}
989
990static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
991{
992 __be32 *targets = bond->params.arp_targets;
993 struct list_head *iter;
994 struct slave *slave;
995 unsigned long *targets_rx;
996 int ind, i;
997
998 if (!bond_is_ip_target_ok(target)) {
999 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1000 &target);
1001 return -EINVAL;
1002 }
1003
1004 ind = bond_get_targets_ip(targets, target);
1005 if (ind == -1) {
1006 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1007 &target);
1008 return -EINVAL;
1009 }
1010
1011 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1012 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1013
1014 netdev_info(bond->dev, "Removing ARP target %pI4\n", &target);
1015
1016 bond_for_each_slave(bond, slave, iter) {
1017 targets_rx = slave->target_last_arp_rx;
1018 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1019 targets_rx[i] = targets_rx[i+1];
1020 targets_rx[i] = 0;
1021 }
1022 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1023 targets[i] = targets[i+1];
1024 targets[i] = 0;
1025
1026 return 0;
1027}
1028
1029void bond_option_arp_ip_targets_clear(struct bonding *bond)
1030{
1031 int i;
1032
1033 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1034 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1035}
1036
1037static int bond_option_arp_ip_targets_set(struct bonding *bond,
1038 const struct bond_opt_value *newval)
1039{
1040 int ret = -EPERM;
1041 __be32 target;
1042
1043 if (newval->string) {
1044 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1045 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1046 &target);
1047 return ret;
1048 }
1049 if (newval->string[0] == '+')
1050 ret = bond_option_arp_ip_target_add(bond, target);
1051 else if (newval->string[0] == '-')
1052 ret = bond_option_arp_ip_target_rem(bond, target);
1053 else
1054 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1055 } else {
1056 target = newval->value;
1057 ret = bond_option_arp_ip_target_add(bond, target);
1058 }
1059
1060 return ret;
1061}
1062
1063static int bond_option_arp_validate_set(struct bonding *bond,
1064 const struct bond_opt_value *newval)
1065{
1066 netdev_info(bond->dev, "Setting arp_validate to %s (%llu)\n",
1067 newval->string, newval->value);
1068
1069 if (bond->dev->flags & IFF_UP) {
1070 if (!newval->value)
1071 bond->recv_probe = NULL;
1072 else if (bond->params.arp_interval)
1073 bond->recv_probe = bond_arp_rcv;
1074 }
1075 bond->params.arp_validate = newval->value;
1076
1077 return 0;
1078}
1079
1080static int bond_option_arp_all_targets_set(struct bonding *bond,
1081 const struct bond_opt_value *newval)
1082{
1083 netdev_info(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1084 newval->string, newval->value);
1085 bond->params.arp_all_targets = newval->value;
1086
1087 return 0;
1088}
1089
1090static int bond_option_primary_set(struct bonding *bond,
1091 const struct bond_opt_value *newval)
1092{
1093 char *p, *primary = newval->string;
1094 struct list_head *iter;
1095 struct slave *slave;
1096
1097 block_netpoll_tx();
1098
1099 p = strchr(primary, '\n');
1100 if (p)
1101 *p = '\0';
1102 /* check to see if we are clearing primary */
1103 if (!strlen(primary)) {
1104 netdev_info(bond->dev, "Setting primary slave to None\n");
1105 RCU_INIT_POINTER(bond->primary_slave, NULL);
1106 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1107 bond_select_active_slave(bond);
1108 goto out;
1109 }
1110
1111 bond_for_each_slave(bond, slave, iter) {
1112 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1113 netdev_info(bond->dev, "Setting %s as primary slave\n",
1114 slave->dev->name);
1115 rcu_assign_pointer(bond->primary_slave, slave);
1116 strcpy(bond->params.primary, slave->dev->name);
1117 bond_select_active_slave(bond);
1118 goto out;
1119 }
1120 }
1121
1122 if (rtnl_dereference(bond->primary_slave)) {
1123 netdev_info(bond->dev, "Setting primary slave to None\n");
1124 RCU_INIT_POINTER(bond->primary_slave, NULL);
1125 bond_select_active_slave(bond);
1126 }
1127 strncpy(bond->params.primary, primary, IFNAMSIZ);
1128 bond->params.primary[IFNAMSIZ - 1] = 0;
1129
1130 netdev_info(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1131 primary, bond->dev->name);
1132
1133out:
1134 unblock_netpoll_tx();
1135
1136 return 0;
1137}
1138
1139static int bond_option_primary_reselect_set(struct bonding *bond,
1140 const struct bond_opt_value *newval)
1141{
1142 netdev_info(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1143 newval->string, newval->value);
1144 bond->params.primary_reselect = newval->value;
1145
1146 block_netpoll_tx();
1147 bond_select_active_slave(bond);
1148 unblock_netpoll_tx();
1149
1150 return 0;
1151}
1152
1153static int bond_option_fail_over_mac_set(struct bonding *bond,
1154 const struct bond_opt_value *newval)
1155{
1156 netdev_info(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1157 newval->string, newval->value);
1158 bond->params.fail_over_mac = newval->value;
1159
1160 return 0;
1161}
1162
1163static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1164 const struct bond_opt_value *newval)
1165{
1166 netdev_info(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1167 newval->string, newval->value);
1168 bond->params.xmit_policy = newval->value;
1169
1170 return 0;
1171}
1172
1173static int bond_option_resend_igmp_set(struct bonding *bond,
1174 const struct bond_opt_value *newval)
1175{
1176 netdev_info(bond->dev, "Setting resend_igmp to %llu\n",
1177 newval->value);
1178 bond->params.resend_igmp = newval->value;
1179
1180 return 0;
1181}
1182
1183static int bond_option_num_peer_notif_set(struct bonding *bond,
1184 const struct bond_opt_value *newval)
1185{
1186 bond->params.num_peer_notif = newval->value;
1187
1188 return 0;
1189}
1190
1191static int bond_option_all_slaves_active_set(struct bonding *bond,
1192 const struct bond_opt_value *newval)
1193{
1194 struct list_head *iter;
1195 struct slave *slave;
1196
1197 if (newval->value == bond->params.all_slaves_active)
1198 return 0;
1199 bond->params.all_slaves_active = newval->value;
1200 bond_for_each_slave(bond, slave, iter) {
1201 if (!bond_is_active_slave(slave)) {
1202 if (newval->value)
1203 slave->inactive = 0;
1204 else
1205 slave->inactive = 1;
1206 }
1207 }
1208
1209 return 0;
1210}
1211
1212static int bond_option_min_links_set(struct bonding *bond,
1213 const struct bond_opt_value *newval)
1214{
1215 netdev_info(bond->dev, "Setting min links value to %llu\n",
1216 newval->value);
1217 bond->params.min_links = newval->value;
1218 bond_set_carrier(bond);
1219
1220 return 0;
1221}
1222
1223static int bond_option_lp_interval_set(struct bonding *bond,
1224 const struct bond_opt_value *newval)
1225{
1226 bond->params.lp_interval = newval->value;
1227
1228 return 0;
1229}
1230
1231static int bond_option_pps_set(struct bonding *bond,
1232 const struct bond_opt_value *newval)
1233{
1234 bond->params.packets_per_slave = newval->value;
1235 if (newval->value > 0) {
1236 bond->params.reciprocal_packets_per_slave =
1237 reciprocal_value(newval->value);
1238 } else {
1239 /* reciprocal_packets_per_slave is unused if
1240 * packets_per_slave is 0 or 1, just initialize it
1241 */
1242 bond->params.reciprocal_packets_per_slave =
1243 (struct reciprocal_value) { 0 };
1244 }
1245
1246 return 0;
1247}
1248
1249static int bond_option_lacp_rate_set(struct bonding *bond,
1250 const struct bond_opt_value *newval)
1251{
1252 netdev_info(bond->dev, "Setting LACP rate to %s (%llu)\n",
1253 newval->string, newval->value);
1254 bond->params.lacp_fast = newval->value;
1255 bond_3ad_update_lacp_rate(bond);
1256
1257 return 0;
1258}
1259
1260static int bond_option_ad_select_set(struct bonding *bond,
1261 const struct bond_opt_value *newval)
1262{
1263 netdev_info(bond->dev, "Setting ad_select to %s (%llu)\n",
1264 newval->string, newval->value);
1265 bond->params.ad_select = newval->value;
1266
1267 return 0;
1268}
1269
1270static int bond_option_queue_id_set(struct bonding *bond,
1271 const struct bond_opt_value *newval)
1272{
1273 struct slave *slave, *update_slave;
1274 struct net_device *sdev;
1275 struct list_head *iter;
1276 char *delim;
1277 int ret = 0;
1278 u16 qid;
1279
1280 /* delim will point to queue id if successful */
1281 delim = strchr(newval->string, ':');
1282 if (!delim)
1283 goto err_no_cmd;
1284
1285 /* Terminate string that points to device name and bump it
1286 * up one, so we can read the queue id there.
1287 */
1288 *delim = '\0';
1289 if (sscanf(++delim, "%hd\n", &qid) != 1)
1290 goto err_no_cmd;
1291
1292 /* Check buffer length, valid ifname and queue id */
1293 if (!dev_valid_name(newval->string) ||
1294 qid > bond->dev->real_num_tx_queues)
1295 goto err_no_cmd;
1296
1297 /* Get the pointer to that interface if it exists */
1298 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1299 if (!sdev)
1300 goto err_no_cmd;
1301
1302 /* Search for thes slave and check for duplicate qids */
1303 update_slave = NULL;
1304 bond_for_each_slave(bond, slave, iter) {
1305 if (sdev == slave->dev)
1306 /* We don't need to check the matching
1307 * slave for dups, since we're overwriting it
1308 */
1309 update_slave = slave;
1310 else if (qid && qid == slave->queue_id) {
1311 goto err_no_cmd;
1312 }
1313 }
1314
1315 if (!update_slave)
1316 goto err_no_cmd;
1317
1318 /* Actually set the qids for the slave */
1319 update_slave->queue_id = qid;
1320
1321out:
1322 return ret;
1323
1324err_no_cmd:
1325 netdev_info(bond->dev, "invalid input for queue_id set\n");
1326 ret = -EPERM;
1327 goto out;
1328
1329}
1330
1331static int bond_option_slaves_set(struct bonding *bond,
1332 const struct bond_opt_value *newval)
1333{
1334 char command[IFNAMSIZ + 1] = { 0, };
1335 struct net_device *dev;
1336 char *ifname;
1337 int ret;
1338
1339 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1340 ifname = command + 1;
1341 if ((strlen(command) <= 1) ||
1342 !dev_valid_name(ifname))
1343 goto err_no_cmd;
1344
1345 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1346 if (!dev) {
1347 netdev_info(bond->dev, "interface %s does not exist!\n",
1348 ifname);
1349 ret = -ENODEV;
1350 goto out;
1351 }
1352
1353 switch (command[0]) {
1354 case '+':
1355 netdev_info(bond->dev, "Adding slave %s\n", dev->name);
1356 ret = bond_enslave(bond->dev, dev);
1357 break;
1358
1359 case '-':
1360 netdev_info(bond->dev, "Removing slave %s\n", dev->name);
1361 ret = bond_release(bond->dev, dev);
1362 break;
1363
1364 default:
1365 goto err_no_cmd;
1366 }
1367
1368out:
1369 return ret;
1370
1371err_no_cmd:
1372 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1373 ret = -EPERM;
1374 goto out;
1375}
1376
1377static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1378 const struct bond_opt_value *newval)
1379{
1380 netdev_info(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1381 newval->string, newval->value);
1382 bond->params.tlb_dynamic_lb = newval->value;
1383
1384 return 0;
1385}
1386
1387static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1388 const struct bond_opt_value *newval)
1389{
1390 netdev_info(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1391 newval->value);
1392
1393 bond->params.ad_actor_sys_prio = newval->value;
1394 bond_3ad_update_ad_actor_settings(bond);
1395
1396 return 0;
1397}
1398
1399static int bond_option_ad_actor_system_set(struct bonding *bond,
1400 const struct bond_opt_value *newval)
1401{
1402 u8 macaddr[ETH_ALEN];
1403 u8 *mac;
1404 int i;
1405
1406 if (newval->string) {
1407 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1408 &macaddr[0], &macaddr[1], &macaddr[2],
1409 &macaddr[3], &macaddr[4], &macaddr[5]);
1410 if (i != ETH_ALEN)
1411 goto err;
1412 mac = macaddr;
1413 } else {
1414 mac = (u8 *)&newval->value;
1415 }
1416
1417 if (!is_valid_ether_addr(mac))
1418 goto err;
1419
1420 netdev_info(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1421 ether_addr_copy(bond->params.ad_actor_system, mac);
1422 bond_3ad_update_ad_actor_settings(bond);
1423
1424 return 0;
1425
1426err:
1427 netdev_err(bond->dev, "Invalid MAC address.\n");
1428 return -EINVAL;
1429}
1430
1431static int bond_option_ad_user_port_key_set(struct bonding *bond,
1432 const struct bond_opt_value *newval)
1433{
1434 netdev_info(bond->dev, "Setting ad_user_port_key to %llu\n",
1435 newval->value);
1436
1437 bond->params.ad_user_port_key = newval->value;
1438 return 0;
1439}