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