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UBUNTU: Ubuntu-4.15.0-96.97
[mirror_ubuntu-bionic-kernel.git] / drivers / net / bonding / bond_options.c
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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 <linux/sched/signal.h>
20
21#include <net/bonding.h>
22
23static int bond_option_active_slave_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25static int bond_option_miimon_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27static int bond_option_updelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29static int bond_option_downdelay_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31static int bond_option_use_carrier_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33static int bond_option_arp_interval_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
36static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
37static int bond_option_arp_ip_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39static int bond_option_arp_validate_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41static int bond_option_arp_all_targets_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43static int bond_option_primary_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45static int bond_option_primary_reselect_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47static int bond_option_fail_over_mac_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49static int bond_option_xmit_hash_policy_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51static int bond_option_resend_igmp_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53static int bond_option_num_peer_notif_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55static int bond_option_all_slaves_active_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57static int bond_option_min_links_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59static int bond_option_lp_interval_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61static int bond_option_pps_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63static int bond_option_lacp_rate_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65static int bond_option_ad_select_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67static int bond_option_queue_id_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69static int bond_option_mode_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71static int bond_option_slaves_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77static int bond_option_ad_actor_system_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79static int bond_option_ad_user_port_key_set(struct bonding *bond,
80 const struct bond_opt_value *newval);
81
82
83static const struct bond_opt_value bond_mode_tbl[] = {
84 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
85 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
86 { "balance-xor", BOND_MODE_XOR, 0},
87 { "broadcast", BOND_MODE_BROADCAST, 0},
88 { "802.3ad", BOND_MODE_8023AD, 0},
89 { "balance-tlb", BOND_MODE_TLB, 0},
90 { "balance-alb", BOND_MODE_ALB, 0},
91 { NULL, -1, 0},
92};
93
94static const struct bond_opt_value bond_pps_tbl[] = {
95 { "default", 1, BOND_VALFLAG_DEFAULT},
96 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
97 { NULL, -1, 0},
98};
99
100static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
101 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
102 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
103 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
104 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
105 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
106 { NULL, -1, 0},
107};
108
109static const struct bond_opt_value bond_arp_validate_tbl[] = {
110 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
111 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
112 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
113 { "all", BOND_ARP_VALIDATE_ALL, 0},
114 { "filter", BOND_ARP_FILTER, 0},
115 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
116 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
117 { NULL, -1, 0},
118};
119
120static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
121 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
122 { "all", BOND_ARP_TARGETS_ALL, 0},
123 { NULL, -1, 0},
124};
125
126static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
127 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
128 { "active", BOND_FOM_ACTIVE, 0},
129 { "follow", BOND_FOM_FOLLOW, 0},
130 { NULL, -1, 0},
131};
132
133static const struct bond_opt_value bond_intmax_tbl[] = {
134 { "off", 0, BOND_VALFLAG_DEFAULT},
135 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
136 { NULL, -1, 0}
137};
138
139static const struct bond_opt_value bond_lacp_rate_tbl[] = {
140 { "slow", AD_LACP_SLOW, 0},
141 { "fast", AD_LACP_FAST, 0},
142 { NULL, -1, 0},
143};
144
145static const struct bond_opt_value bond_ad_select_tbl[] = {
146 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
147 { "bandwidth", BOND_AD_BANDWIDTH, 0},
148 { "count", BOND_AD_COUNT, 0},
149 { NULL, -1, 0},
150};
151
152static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
153 { "off", 0, 0},
154 { "maxval", 255, BOND_VALFLAG_MAX},
155 { "default", 1, BOND_VALFLAG_DEFAULT},
156 { NULL, -1, 0}
157};
158
159static const struct bond_opt_value bond_primary_reselect_tbl[] = {
160 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
161 { "better", BOND_PRI_RESELECT_BETTER, 0},
162 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
163 { NULL, -1},
164};
165
166static const struct bond_opt_value bond_use_carrier_tbl[] = {
167 { "off", 0, 0},
168 { "on", 1, BOND_VALFLAG_DEFAULT},
169 { NULL, -1, 0}
170};
171
172static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
173 { "off", 0, BOND_VALFLAG_DEFAULT},
174 { "on", 1, 0},
175 { NULL, -1, 0}
176};
177
178static const struct bond_opt_value bond_resend_igmp_tbl[] = {
179 { "off", 0, 0},
180 { "maxval", 255, BOND_VALFLAG_MAX},
181 { "default", 1, BOND_VALFLAG_DEFAULT},
182 { NULL, -1, 0}
183};
184
185static const struct bond_opt_value bond_lp_interval_tbl[] = {
186 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
187 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
188 { NULL, -1, 0},
189};
190
191static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
192 { "off", 0, 0},
193 { "on", 1, BOND_VALFLAG_DEFAULT},
194 { NULL, -1, 0}
195};
196
197static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
198 { "minval", 1, BOND_VALFLAG_MIN},
199 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
200 { NULL, -1, 0},
201};
202
203static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
204 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
205 { "maxval", 1023, BOND_VALFLAG_MAX},
206 { NULL, -1, 0},
207};
208
209static const struct bond_option bond_opts[BOND_OPT_LAST] = {
210 [BOND_OPT_MODE] = {
211 .id = BOND_OPT_MODE,
212 .name = "mode",
213 .desc = "bond device mode",
214 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
215 .values = bond_mode_tbl,
216 .set = bond_option_mode_set
217 },
218 [BOND_OPT_PACKETS_PER_SLAVE] = {
219 .id = BOND_OPT_PACKETS_PER_SLAVE,
220 .name = "packets_per_slave",
221 .desc = "Packets to send per slave in RR mode",
222 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
223 .values = bond_pps_tbl,
224 .set = bond_option_pps_set
225 },
226 [BOND_OPT_XMIT_HASH] = {
227 .id = BOND_OPT_XMIT_HASH,
228 .name = "xmit_hash_policy",
229 .desc = "balance-xor, 802.3ad, and tlb hashing method",
230 .values = bond_xmit_hashtype_tbl,
231 .set = bond_option_xmit_hash_policy_set
232 },
233 [BOND_OPT_ARP_VALIDATE] = {
234 .id = BOND_OPT_ARP_VALIDATE,
235 .name = "arp_validate",
236 .desc = "validate src/dst of ARP probes",
237 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
238 BIT(BOND_MODE_ALB),
239 .values = bond_arp_validate_tbl,
240 .set = bond_option_arp_validate_set
241 },
242 [BOND_OPT_ARP_ALL_TARGETS] = {
243 .id = BOND_OPT_ARP_ALL_TARGETS,
244 .name = "arp_all_targets",
245 .desc = "fail on any/all arp targets timeout",
246 .values = bond_arp_all_targets_tbl,
247 .set = bond_option_arp_all_targets_set
248 },
249 [BOND_OPT_FAIL_OVER_MAC] = {
250 .id = BOND_OPT_FAIL_OVER_MAC,
251 .name = "fail_over_mac",
252 .desc = "For active-backup, do not set all slaves to the same MAC",
253 .flags = BOND_OPTFLAG_NOSLAVES,
254 .values = bond_fail_over_mac_tbl,
255 .set = bond_option_fail_over_mac_set
256 },
257 [BOND_OPT_ARP_INTERVAL] = {
258 .id = BOND_OPT_ARP_INTERVAL,
259 .name = "arp_interval",
260 .desc = "arp interval in milliseconds",
261 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
262 BIT(BOND_MODE_ALB),
263 .values = bond_intmax_tbl,
264 .set = bond_option_arp_interval_set
265 },
266 [BOND_OPT_ARP_TARGETS] = {
267 .id = BOND_OPT_ARP_TARGETS,
268 .name = "arp_ip_target",
269 .desc = "arp targets in n.n.n.n form",
270 .flags = BOND_OPTFLAG_RAWVAL,
271 .set = bond_option_arp_ip_targets_set
272 },
273 [BOND_OPT_DOWNDELAY] = {
274 .id = BOND_OPT_DOWNDELAY,
275 .name = "downdelay",
276 .desc = "Delay before considering link down, in milliseconds",
277 .values = bond_intmax_tbl,
278 .set = bond_option_downdelay_set
279 },
280 [BOND_OPT_UPDELAY] = {
281 .id = BOND_OPT_UPDELAY,
282 .name = "updelay",
283 .desc = "Delay before considering link up, in milliseconds",
284 .values = bond_intmax_tbl,
285 .set = bond_option_updelay_set
286 },
287 [BOND_OPT_LACP_RATE] = {
288 .id = BOND_OPT_LACP_RATE,
289 .name = "lacp_rate",
290 .desc = "LACPDU tx rate to request from 802.3ad partner",
291 .flags = BOND_OPTFLAG_IFDOWN,
292 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
293 .values = bond_lacp_rate_tbl,
294 .set = bond_option_lacp_rate_set
295 },
296 [BOND_OPT_MINLINKS] = {
297 .id = BOND_OPT_MINLINKS,
298 .name = "min_links",
299 .desc = "Minimum number of available links before turning on carrier",
300 .values = bond_intmax_tbl,
301 .set = bond_option_min_links_set
302 },
303 [BOND_OPT_AD_SELECT] = {
304 .id = BOND_OPT_AD_SELECT,
305 .name = "ad_select",
306 .desc = "803.ad aggregation selection logic",
307 .flags = BOND_OPTFLAG_IFDOWN,
308 .values = bond_ad_select_tbl,
309 .set = bond_option_ad_select_set
310 },
311 [BOND_OPT_NUM_PEER_NOTIF] = {
312 .id = BOND_OPT_NUM_PEER_NOTIF,
313 .name = "num_unsol_na",
314 .desc = "Number of peer notifications to send on failover event",
315 .values = bond_num_peer_notif_tbl,
316 .set = bond_option_num_peer_notif_set
317 },
318 [BOND_OPT_MIIMON] = {
319 .id = BOND_OPT_MIIMON,
320 .name = "miimon",
321 .desc = "Link check interval in milliseconds",
322 .values = bond_intmax_tbl,
323 .set = bond_option_miimon_set
324 },
325 [BOND_OPT_PRIMARY] = {
326 .id = BOND_OPT_PRIMARY,
327 .name = "primary",
328 .desc = "Primary network device to use",
329 .flags = BOND_OPTFLAG_RAWVAL,
330 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
331 BIT(BOND_MODE_TLB) |
332 BIT(BOND_MODE_ALB)),
333 .set = bond_option_primary_set
334 },
335 [BOND_OPT_PRIMARY_RESELECT] = {
336 .id = BOND_OPT_PRIMARY_RESELECT,
337 .name = "primary_reselect",
338 .desc = "Reselect primary slave once it comes up",
339 .values = bond_primary_reselect_tbl,
340 .set = bond_option_primary_reselect_set
341 },
342 [BOND_OPT_USE_CARRIER] = {
343 .id = BOND_OPT_USE_CARRIER,
344 .name = "use_carrier",
345 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
346 .values = bond_use_carrier_tbl,
347 .set = bond_option_use_carrier_set
348 },
349 [BOND_OPT_ACTIVE_SLAVE] = {
350 .id = BOND_OPT_ACTIVE_SLAVE,
351 .name = "active_slave",
352 .desc = "Currently active slave",
353 .flags = BOND_OPTFLAG_RAWVAL,
354 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
355 BIT(BOND_MODE_TLB) |
356 BIT(BOND_MODE_ALB)),
357 .set = bond_option_active_slave_set
358 },
359 [BOND_OPT_QUEUE_ID] = {
360 .id = BOND_OPT_QUEUE_ID,
361 .name = "queue_id",
362 .desc = "Set queue id of a slave",
363 .flags = BOND_OPTFLAG_RAWVAL,
364 .set = bond_option_queue_id_set
365 },
366 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
367 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
368 .name = "all_slaves_active",
369 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
370 .values = bond_all_slaves_active_tbl,
371 .set = bond_option_all_slaves_active_set
372 },
373 [BOND_OPT_RESEND_IGMP] = {
374 .id = BOND_OPT_RESEND_IGMP,
375 .name = "resend_igmp",
376 .desc = "Number of IGMP membership reports to send on link failure",
377 .values = bond_resend_igmp_tbl,
378 .set = bond_option_resend_igmp_set
379 },
380 [BOND_OPT_LP_INTERVAL] = {
381 .id = BOND_OPT_LP_INTERVAL,
382 .name = "lp_interval",
383 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
384 .values = bond_lp_interval_tbl,
385 .set = bond_option_lp_interval_set
386 },
387 [BOND_OPT_SLAVES] = {
388 .id = BOND_OPT_SLAVES,
389 .name = "slaves",
390 .desc = "Slave membership management",
391 .flags = BOND_OPTFLAG_RAWVAL,
392 .set = bond_option_slaves_set
393 },
394 [BOND_OPT_TLB_DYNAMIC_LB] = {
395 .id = BOND_OPT_TLB_DYNAMIC_LB,
396 .name = "tlb_dynamic_lb",
397 .desc = "Enable dynamic flow shuffling",
398 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
399 .values = bond_tlb_dynamic_lb_tbl,
400 .flags = BOND_OPTFLAG_IFDOWN,
401 .set = bond_option_tlb_dynamic_lb_set,
402 },
403 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
404 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
405 .name = "ad_actor_sys_prio",
406 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
407 .values = bond_ad_actor_sys_prio_tbl,
408 .set = bond_option_ad_actor_sys_prio_set,
409 },
410 [BOND_OPT_AD_ACTOR_SYSTEM] = {
411 .id = BOND_OPT_AD_ACTOR_SYSTEM,
412 .name = "ad_actor_system",
413 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
414 .flags = BOND_OPTFLAG_RAWVAL,
415 .set = bond_option_ad_actor_system_set,
416 },
417 [BOND_OPT_AD_USER_PORT_KEY] = {
418 .id = BOND_OPT_AD_USER_PORT_KEY,
419 .name = "ad_user_port_key",
420 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
421 .flags = BOND_OPTFLAG_IFDOWN,
422 .values = bond_ad_user_port_key_tbl,
423 .set = bond_option_ad_user_port_key_set,
424 },
425 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
426 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
427 .name = "num_grat_arp",
428 .desc = "Number of peer notifications to send on failover event",
429 .values = bond_num_peer_notif_tbl,
430 .set = bond_option_num_peer_notif_set
431 }
432};
433
434/* Searches for an option by name */
435const struct bond_option *bond_opt_get_by_name(const char *name)
436{
437 const struct bond_option *opt;
438 int option;
439
440 for (option = 0; option < BOND_OPT_LAST; option++) {
441 opt = bond_opt_get(option);
442 if (opt && !strcmp(opt->name, name))
443 return opt;
444 }
445
446 return NULL;
447}
448
449/* Searches for a value in opt's values[] table */
450const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
451{
452 const struct bond_option *opt;
453 int i;
454
455 opt = bond_opt_get(option);
456 if (WARN_ON(!opt))
457 return NULL;
458 for (i = 0; opt->values && opt->values[i].string; i++)
459 if (opt->values[i].value == val)
460 return &opt->values[i];
461
462 return NULL;
463}
464
465/* Searches for a value in opt's values[] table which matches the flagmask */
466static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
467 u32 flagmask)
468{
469 int i;
470
471 for (i = 0; opt->values && opt->values[i].string; i++)
472 if (opt->values[i].flags & flagmask)
473 return &opt->values[i];
474
475 return NULL;
476}
477
478/* If maxval is missing then there's no range to check. In case minval is
479 * missing then it's considered to be 0.
480 */
481static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
482{
483 const struct bond_opt_value *minval, *maxval;
484
485 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
486 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
487 if (!maxval || (minval && val < minval->value) || val > maxval->value)
488 return false;
489
490 return true;
491}
492
493/**
494 * bond_opt_parse - parse option value
495 * @opt: the option to parse against
496 * @val: value to parse
497 *
498 * This function tries to extract the value from @val and check if it's
499 * a possible match for the option and returns NULL if a match isn't found,
500 * or the struct_opt_value that matched. It also strips the new line from
501 * @val->string if it's present.
502 */
503const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
504 struct bond_opt_value *val)
505{
506 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
507 const struct bond_opt_value *tbl;
508 const struct bond_opt_value *ret = NULL;
509 bool checkval;
510 int i, rv;
511
512 /* No parsing if the option wants a raw val */
513 if (opt->flags & BOND_OPTFLAG_RAWVAL)
514 return val;
515
516 tbl = opt->values;
517 if (!tbl)
518 goto out;
519
520 /* ULLONG_MAX is used to bypass string processing */
521 checkval = val->value != ULLONG_MAX;
522 if (!checkval) {
523 if (!val->string)
524 goto out;
525 p = strchr(val->string, '\n');
526 if (p)
527 *p = '\0';
528 for (p = val->string; *p; p++)
529 if (!(isdigit(*p) || isspace(*p)))
530 break;
531 /* The following code extracts the string to match or the value
532 * and sets checkval appropriately
533 */
534 if (*p) {
535 rv = sscanf(val->string, "%32s", valstr);
536 } else {
537 rv = sscanf(val->string, "%llu", &val->value);
538 checkval = true;
539 }
540 if (!rv)
541 goto out;
542 }
543
544 for (i = 0; tbl[i].string; i++) {
545 /* Check for exact match */
546 if (checkval) {
547 if (val->value == tbl[i].value)
548 ret = &tbl[i];
549 } else {
550 if (!strcmp(valstr, "default") &&
551 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
552 ret = &tbl[i];
553
554 if (!strcmp(valstr, tbl[i].string))
555 ret = &tbl[i];
556 }
557 /* Found an exact match */
558 if (ret)
559 goto out;
560 }
561 /* Possible range match */
562 if (checkval && bond_opt_check_range(opt, val->value))
563 ret = val;
564out:
565 return ret;
566}
567
568/* Check opt's dependencies against bond mode and currently set options */
569static int bond_opt_check_deps(struct bonding *bond,
570 const struct bond_option *opt)
571{
572 struct bond_params *params = &bond->params;
573
574 if (test_bit(params->mode, &opt->unsuppmodes))
575 return -EACCES;
576 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
577 return -ENOTEMPTY;
578 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
579 return -EBUSY;
580
581 return 0;
582}
583
584static void bond_opt_dep_print(struct bonding *bond,
585 const struct bond_option *opt)
586{
587 const struct bond_opt_value *modeval;
588 struct bond_params *params;
589
590 params = &bond->params;
591 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
592 if (test_bit(params->mode, &opt->unsuppmodes))
593 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
594 opt->name, modeval->string, modeval->value);
595}
596
597static void bond_opt_error_interpret(struct bonding *bond,
598 const struct bond_option *opt,
599 int error, const struct bond_opt_value *val)
600{
601 const struct bond_opt_value *minval, *maxval;
602 char *p;
603
604 switch (error) {
605 case -EINVAL:
606 if (val) {
607 if (val->string) {
608 /* sometimes RAWVAL opts may have new lines */
609 p = strchr(val->string, '\n');
610 if (p)
611 *p = '\0';
612 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
613 opt->name, val->string);
614 } else {
615 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
616 opt->name, val->value);
617 }
618 }
619 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
620 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
621 if (!maxval)
622 break;
623 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
624 opt->name, minval ? minval->value : 0, maxval->value);
625 break;
626 case -EACCES:
627 bond_opt_dep_print(bond, opt);
628 break;
629 case -ENOTEMPTY:
630 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
631 opt->name);
632 break;
633 case -EBUSY:
634 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
635 opt->name);
636 break;
637 default:
638 break;
639 }
640}
641
642/**
643 * __bond_opt_set - set a bonding option
644 * @bond: target bond device
645 * @option: option to set
646 * @val: value to set it to
647 *
648 * This function is used to change the bond's option value, it can be
649 * used for both enabling/changing an option and for disabling it. RTNL lock
650 * must be obtained before calling this function.
651 */
652int __bond_opt_set(struct bonding *bond,
653 unsigned int option, struct bond_opt_value *val)
654{
655 const struct bond_opt_value *retval = NULL;
656 const struct bond_option *opt;
657 int ret = -ENOENT;
658
659 ASSERT_RTNL();
660
661 opt = bond_opt_get(option);
662 if (WARN_ON(!val) || WARN_ON(!opt))
663 goto out;
664 ret = bond_opt_check_deps(bond, opt);
665 if (ret)
666 goto out;
667 retval = bond_opt_parse(opt, val);
668 if (!retval) {
669 ret = -EINVAL;
670 goto out;
671 }
672 ret = opt->set(bond, retval);
673out:
674 if (ret)
675 bond_opt_error_interpret(bond, opt, ret, val);
676
677 return ret;
678}
679/**
680 * __bond_opt_set_notify - set a bonding option
681 * @bond: target bond device
682 * @option: option to set
683 * @val: value to set it to
684 *
685 * This function is used to change the bond's option value and trigger
686 * a notification to user sapce. It can be used for both enabling/changing
687 * an option and for disabling it. RTNL lock must be obtained before calling
688 * this function.
689 */
690int __bond_opt_set_notify(struct bonding *bond,
691 unsigned int option, struct bond_opt_value *val)
692{
693 int ret = -ENOENT;
694
695 ASSERT_RTNL();
696
697 ret = __bond_opt_set(bond, option, val);
698
699 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
700 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
701
702 return ret;
703}
704
705/**
706 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
707 * @bond: target bond device
708 * @option: option to set
709 * @buf: value to set it to
710 *
711 * This function tries to acquire RTNL without blocking and if successful
712 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
713 */
714int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
715{
716 struct bond_opt_value optval;
717 int ret;
718
719 if (!rtnl_trylock())
720 return restart_syscall();
721 bond_opt_initstr(&optval, buf);
722 ret = __bond_opt_set_notify(bond, option, &optval);
723 rtnl_unlock();
724
725 return ret;
726}
727
728/**
729 * bond_opt_get - get a pointer to an option
730 * @option: option for which to return a pointer
731 *
732 * This function checks if option is valid and if so returns a pointer
733 * to its entry in the bond_opts[] option array.
734 */
735const struct bond_option *bond_opt_get(unsigned int option)
736{
737 if (!BOND_OPT_VALID(option))
738 return NULL;
739
740 return &bond_opts[option];
741}
742
743static int bond_option_mode_set(struct bonding *bond,
744 const struct bond_opt_value *newval)
745{
746 if (!bond_mode_uses_arp(newval->value)) {
747 if (bond->params.arp_interval) {
748 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
749 newval->string);
750 /* disable arp monitoring */
751 bond->params.arp_interval = 0;
752 }
753
754 if (!bond->params.miimon) {
755 /* set miimon to default value */
756 bond->params.miimon = BOND_DEFAULT_MIIMON;
757 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
758 bond->params.miimon);
759 }
760 }
761
762 if (newval->value == BOND_MODE_ALB)
763 bond->params.tlb_dynamic_lb = 1;
764
765 /* don't cache arp_validate between modes */
766 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
767 bond->params.mode = newval->value;
768
769 return 0;
770}
771
772static int bond_option_active_slave_set(struct bonding *bond,
773 const struct bond_opt_value *newval)
774{
775 char ifname[IFNAMSIZ] = { 0, };
776 struct net_device *slave_dev;
777 int ret = 0;
778
779 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
780 if (!strlen(ifname) || newval->string[0] == '\n') {
781 slave_dev = NULL;
782 } else {
783 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
784 if (!slave_dev)
785 return -ENODEV;
786 }
787
788 if (slave_dev) {
789 if (!netif_is_bond_slave(slave_dev)) {
790 netdev_err(bond->dev, "Device %s is not bonding slave\n",
791 slave_dev->name);
792 return -EINVAL;
793 }
794
795 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
796 netdev_err(bond->dev, "Device %s is not our slave\n",
797 slave_dev->name);
798 return -EINVAL;
799 }
800 }
801
802 block_netpoll_tx();
803 /* check to see if we are clearing active */
804 if (!slave_dev) {
805 netdev_dbg(bond->dev, "Clearing current active slave\n");
806 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
807 bond_select_active_slave(bond);
808 } else {
809 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
810 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
811
812 BUG_ON(!new_active);
813
814 if (new_active == old_active) {
815 /* do nothing */
816 netdev_dbg(bond->dev, "%s is already the current active slave\n",
817 new_active->dev->name);
818 } else {
819 if (old_active && (new_active->link == BOND_LINK_UP) &&
820 bond_slave_is_up(new_active)) {
821 netdev_dbg(bond->dev, "Setting %s as active slave\n",
822 new_active->dev->name);
823 bond_change_active_slave(bond, new_active);
824 } else {
825 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
826 new_active->dev->name,
827 new_active->dev->name);
828 ret = -EINVAL;
829 }
830 }
831 }
832 unblock_netpoll_tx();
833
834 return ret;
835}
836
837/* There are two tricky bits here. First, if MII monitoring is activated, then
838 * we must disable ARP monitoring. Second, if the timer isn't running, we must
839 * start it.
840 */
841static int bond_option_miimon_set(struct bonding *bond,
842 const struct bond_opt_value *newval)
843{
844 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
845 newval->value);
846 bond->params.miimon = newval->value;
847 if (bond->params.updelay)
848 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
849 bond->params.updelay * bond->params.miimon);
850 if (bond->params.downdelay)
851 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
852 bond->params.downdelay * bond->params.miimon);
853 if (newval->value && bond->params.arp_interval) {
854 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
855 bond->params.arp_interval = 0;
856 if (bond->params.arp_validate)
857 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
858 }
859 if (bond->dev->flags & IFF_UP) {
860 /* If the interface is up, we may need to fire off
861 * the MII timer. If the interface is down, the
862 * timer will get fired off when the open function
863 * is called.
864 */
865 if (!newval->value) {
866 cancel_delayed_work_sync(&bond->mii_work);
867 } else {
868 cancel_delayed_work_sync(&bond->arp_work);
869 queue_delayed_work(bond->wq, &bond->mii_work, 0);
870 }
871 }
872
873 return 0;
874}
875
876/* Set up and down delays. These must be multiples of the
877 * MII monitoring value, and are stored internally as the multiplier.
878 * Thus, we must translate to MS for the real world.
879 */
880static int bond_option_updelay_set(struct bonding *bond,
881 const struct bond_opt_value *newval)
882{
883 int value = newval->value;
884
885 if (!bond->params.miimon) {
886 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
887 return -EPERM;
888 }
889 if ((value % bond->params.miimon) != 0) {
890 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
891 value, bond->params.miimon,
892 (value / bond->params.miimon) *
893 bond->params.miimon);
894 }
895 bond->params.updelay = value / bond->params.miimon;
896 netdev_dbg(bond->dev, "Setting up delay to %d\n",
897 bond->params.updelay * bond->params.miimon);
898
899 return 0;
900}
901
902static int bond_option_downdelay_set(struct bonding *bond,
903 const struct bond_opt_value *newval)
904{
905 int value = newval->value;
906
907 if (!bond->params.miimon) {
908 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
909 return -EPERM;
910 }
911 if ((value % bond->params.miimon) != 0) {
912 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
913 value, bond->params.miimon,
914 (value / bond->params.miimon) *
915 bond->params.miimon);
916 }
917 bond->params.downdelay = value / bond->params.miimon;
918 netdev_dbg(bond->dev, "Setting down delay to %d\n",
919 bond->params.downdelay * bond->params.miimon);
920
921 return 0;
922}
923
924static int bond_option_use_carrier_set(struct bonding *bond,
925 const struct bond_opt_value *newval)
926{
927 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
928 newval->value);
929 bond->params.use_carrier = newval->value;
930
931 return 0;
932}
933
934/* There are two tricky bits here. First, if ARP monitoring is activated, then
935 * we must disable MII monitoring. Second, if the ARP timer isn't running,
936 * we must start it.
937 */
938static int bond_option_arp_interval_set(struct bonding *bond,
939 const struct bond_opt_value *newval)
940{
941 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
942 newval->value);
943 bond->params.arp_interval = newval->value;
944 if (newval->value) {
945 if (bond->params.miimon) {
946 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
947 bond->params.miimon = 0;
948 }
949 if (!bond->params.arp_targets[0])
950 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
951 }
952 if (bond->dev->flags & IFF_UP) {
953 /* If the interface is up, we may need to fire off
954 * the ARP timer. If the interface is down, the
955 * timer will get fired off when the open function
956 * is called.
957 */
958 if (!newval->value) {
959 if (bond->params.arp_validate)
960 bond->recv_probe = NULL;
961 cancel_delayed_work_sync(&bond->arp_work);
962 } else {
963 /* arp_validate can be set only in active-backup mode */
964 bond->recv_probe = bond_arp_rcv;
965 cancel_delayed_work_sync(&bond->mii_work);
966 queue_delayed_work(bond->wq, &bond->arp_work, 0);
967 }
968 }
969
970 return 0;
971}
972
973static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
974 __be32 target,
975 unsigned long last_rx)
976{
977 __be32 *targets = bond->params.arp_targets;
978 struct list_head *iter;
979 struct slave *slave;
980
981 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
982 bond_for_each_slave(bond, slave, iter)
983 slave->target_last_arp_rx[slot] = last_rx;
984 targets[slot] = target;
985 }
986}
987
988static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
989{
990 __be32 *targets = bond->params.arp_targets;
991 int ind;
992
993 if (!bond_is_ip_target_ok(target)) {
994 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
995 &target);
996 return -EINVAL;
997 }
998
999 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1000 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1001 &target);
1002 return -EINVAL;
1003 }
1004
1005 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1006 if (ind == -1) {
1007 netdev_err(bond->dev, "ARP target table is full!\n");
1008 return -EINVAL;
1009 }
1010
1011 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1012
1013 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1014
1015 return 0;
1016}
1017
1018static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1019{
1020 return _bond_option_arp_ip_target_add(bond, target);
1021}
1022
1023static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1024{
1025 __be32 *targets = bond->params.arp_targets;
1026 struct list_head *iter;
1027 struct slave *slave;
1028 unsigned long *targets_rx;
1029 int ind, i;
1030
1031 if (!bond_is_ip_target_ok(target)) {
1032 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1033 &target);
1034 return -EINVAL;
1035 }
1036
1037 ind = bond_get_targets_ip(targets, target);
1038 if (ind == -1) {
1039 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1040 &target);
1041 return -EINVAL;
1042 }
1043
1044 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1045 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1046
1047 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1048
1049 bond_for_each_slave(bond, slave, iter) {
1050 targets_rx = slave->target_last_arp_rx;
1051 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1052 targets_rx[i] = targets_rx[i+1];
1053 targets_rx[i] = 0;
1054 }
1055 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1056 targets[i] = targets[i+1];
1057 targets[i] = 0;
1058
1059 return 0;
1060}
1061
1062void bond_option_arp_ip_targets_clear(struct bonding *bond)
1063{
1064 int i;
1065
1066 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1067 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1068}
1069
1070static int bond_option_arp_ip_targets_set(struct bonding *bond,
1071 const struct bond_opt_value *newval)
1072{
1073 int ret = -EPERM;
1074 __be32 target;
1075
1076 if (newval->string) {
1077 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1078 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1079 &target);
1080 return ret;
1081 }
1082 if (newval->string[0] == '+')
1083 ret = bond_option_arp_ip_target_add(bond, target);
1084 else if (newval->string[0] == '-')
1085 ret = bond_option_arp_ip_target_rem(bond, target);
1086 else
1087 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1088 } else {
1089 target = newval->value;
1090 ret = bond_option_arp_ip_target_add(bond, target);
1091 }
1092
1093 return ret;
1094}
1095
1096static int bond_option_arp_validate_set(struct bonding *bond,
1097 const struct bond_opt_value *newval)
1098{
1099 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1100 newval->string, newval->value);
1101 bond->params.arp_validate = newval->value;
1102
1103 return 0;
1104}
1105
1106static int bond_option_arp_all_targets_set(struct bonding *bond,
1107 const struct bond_opt_value *newval)
1108{
1109 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1110 newval->string, newval->value);
1111 bond->params.arp_all_targets = newval->value;
1112
1113 return 0;
1114}
1115
1116static int bond_option_primary_set(struct bonding *bond,
1117 const struct bond_opt_value *newval)
1118{
1119 char *p, *primary = newval->string;
1120 struct list_head *iter;
1121 struct slave *slave;
1122
1123 block_netpoll_tx();
1124
1125 p = strchr(primary, '\n');
1126 if (p)
1127 *p = '\0';
1128 /* check to see if we are clearing primary */
1129 if (!strlen(primary)) {
1130 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1131 RCU_INIT_POINTER(bond->primary_slave, NULL);
1132 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1133 bond_select_active_slave(bond);
1134 goto out;
1135 }
1136
1137 bond_for_each_slave(bond, slave, iter) {
1138 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1139 netdev_dbg(bond->dev, "Setting %s as primary slave\n",
1140 slave->dev->name);
1141 rcu_assign_pointer(bond->primary_slave, slave);
1142 strcpy(bond->params.primary, slave->dev->name);
1143 bond->force_primary = true;
1144 bond_select_active_slave(bond);
1145 goto out;
1146 }
1147 }
1148
1149 if (rtnl_dereference(bond->primary_slave)) {
1150 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1151 RCU_INIT_POINTER(bond->primary_slave, NULL);
1152 bond_select_active_slave(bond);
1153 }
1154 strncpy(bond->params.primary, primary, IFNAMSIZ);
1155 bond->params.primary[IFNAMSIZ - 1] = 0;
1156
1157 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1158 primary, bond->dev->name);
1159
1160out:
1161 unblock_netpoll_tx();
1162
1163 return 0;
1164}
1165
1166static int bond_option_primary_reselect_set(struct bonding *bond,
1167 const struct bond_opt_value *newval)
1168{
1169 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1170 newval->string, newval->value);
1171 bond->params.primary_reselect = newval->value;
1172
1173 block_netpoll_tx();
1174 bond_select_active_slave(bond);
1175 unblock_netpoll_tx();
1176
1177 return 0;
1178}
1179
1180static int bond_option_fail_over_mac_set(struct bonding *bond,
1181 const struct bond_opt_value *newval)
1182{
1183 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1184 newval->string, newval->value);
1185 bond->params.fail_over_mac = newval->value;
1186
1187 return 0;
1188}
1189
1190static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1191 const struct bond_opt_value *newval)
1192{
1193 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1194 newval->string, newval->value);
1195 bond->params.xmit_policy = newval->value;
1196
1197 return 0;
1198}
1199
1200static int bond_option_resend_igmp_set(struct bonding *bond,
1201 const struct bond_opt_value *newval)
1202{
1203 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1204 newval->value);
1205 bond->params.resend_igmp = newval->value;
1206
1207 return 0;
1208}
1209
1210static int bond_option_num_peer_notif_set(struct bonding *bond,
1211 const struct bond_opt_value *newval)
1212{
1213 bond->params.num_peer_notif = newval->value;
1214
1215 return 0;
1216}
1217
1218static int bond_option_all_slaves_active_set(struct bonding *bond,
1219 const struct bond_opt_value *newval)
1220{
1221 struct list_head *iter;
1222 struct slave *slave;
1223
1224 if (newval->value == bond->params.all_slaves_active)
1225 return 0;
1226 bond->params.all_slaves_active = newval->value;
1227 bond_for_each_slave(bond, slave, iter) {
1228 if (!bond_is_active_slave(slave)) {
1229 if (newval->value)
1230 slave->inactive = 0;
1231 else
1232 slave->inactive = 1;
1233 }
1234 }
1235
1236 return 0;
1237}
1238
1239static int bond_option_min_links_set(struct bonding *bond,
1240 const struct bond_opt_value *newval)
1241{
1242 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1243 newval->value);
1244 bond->params.min_links = newval->value;
1245 bond_set_carrier(bond);
1246
1247 return 0;
1248}
1249
1250static int bond_option_lp_interval_set(struct bonding *bond,
1251 const struct bond_opt_value *newval)
1252{
1253 bond->params.lp_interval = newval->value;
1254
1255 return 0;
1256}
1257
1258static int bond_option_pps_set(struct bonding *bond,
1259 const struct bond_opt_value *newval)
1260{
1261 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1262 newval->value);
1263 bond->params.packets_per_slave = newval->value;
1264 if (newval->value > 0) {
1265 bond->params.reciprocal_packets_per_slave =
1266 reciprocal_value(newval->value);
1267 } else {
1268 /* reciprocal_packets_per_slave is unused if
1269 * packets_per_slave is 0 or 1, just initialize it
1270 */
1271 bond->params.reciprocal_packets_per_slave =
1272 (struct reciprocal_value) { 0 };
1273 }
1274
1275 return 0;
1276}
1277
1278static int bond_option_lacp_rate_set(struct bonding *bond,
1279 const struct bond_opt_value *newval)
1280{
1281 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1282 newval->string, newval->value);
1283 bond->params.lacp_fast = newval->value;
1284 bond_3ad_update_lacp_rate(bond);
1285
1286 return 0;
1287}
1288
1289static int bond_option_ad_select_set(struct bonding *bond,
1290 const struct bond_opt_value *newval)
1291{
1292 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1293 newval->string, newval->value);
1294 bond->params.ad_select = newval->value;
1295
1296 return 0;
1297}
1298
1299static int bond_option_queue_id_set(struct bonding *bond,
1300 const struct bond_opt_value *newval)
1301{
1302 struct slave *slave, *update_slave;
1303 struct net_device *sdev;
1304 struct list_head *iter;
1305 char *delim;
1306 int ret = 0;
1307 u16 qid;
1308
1309 /* delim will point to queue id if successful */
1310 delim = strchr(newval->string, ':');
1311 if (!delim)
1312 goto err_no_cmd;
1313
1314 /* Terminate string that points to device name and bump it
1315 * up one, so we can read the queue id there.
1316 */
1317 *delim = '\0';
1318 if (sscanf(++delim, "%hd\n", &qid) != 1)
1319 goto err_no_cmd;
1320
1321 /* Check buffer length, valid ifname and queue id */
1322 if (!dev_valid_name(newval->string) ||
1323 qid > bond->dev->real_num_tx_queues)
1324 goto err_no_cmd;
1325
1326 /* Get the pointer to that interface if it exists */
1327 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1328 if (!sdev)
1329 goto err_no_cmd;
1330
1331 /* Search for thes slave and check for duplicate qids */
1332 update_slave = NULL;
1333 bond_for_each_slave(bond, slave, iter) {
1334 if (sdev == slave->dev)
1335 /* We don't need to check the matching
1336 * slave for dups, since we're overwriting it
1337 */
1338 update_slave = slave;
1339 else if (qid && qid == slave->queue_id) {
1340 goto err_no_cmd;
1341 }
1342 }
1343
1344 if (!update_slave)
1345 goto err_no_cmd;
1346
1347 /* Actually set the qids for the slave */
1348 update_slave->queue_id = qid;
1349
1350out:
1351 return ret;
1352
1353err_no_cmd:
1354 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1355 ret = -EPERM;
1356 goto out;
1357
1358}
1359
1360static int bond_option_slaves_set(struct bonding *bond,
1361 const struct bond_opt_value *newval)
1362{
1363 char command[IFNAMSIZ + 1] = { 0, };
1364 struct net_device *dev;
1365 char *ifname;
1366 int ret;
1367
1368 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1369 ifname = command + 1;
1370 if ((strlen(command) <= 1) ||
1371 !dev_valid_name(ifname))
1372 goto err_no_cmd;
1373
1374 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1375 if (!dev) {
1376 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1377 ifname);
1378 ret = -ENODEV;
1379 goto out;
1380 }
1381
1382 switch (command[0]) {
1383 case '+':
1384 netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
1385 ret = bond_enslave(bond->dev, dev, NULL);
1386 break;
1387
1388 case '-':
1389 netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
1390 ret = bond_release(bond->dev, dev);
1391 break;
1392
1393 default:
1394 goto err_no_cmd;
1395 }
1396
1397out:
1398 return ret;
1399
1400err_no_cmd:
1401 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1402 ret = -EPERM;
1403 goto out;
1404}
1405
1406static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1407 const struct bond_opt_value *newval)
1408{
1409 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1410 newval->string, newval->value);
1411 bond->params.tlb_dynamic_lb = newval->value;
1412
1413 return 0;
1414}
1415
1416static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1417 const struct bond_opt_value *newval)
1418{
1419 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1420 newval->value);
1421
1422 bond->params.ad_actor_sys_prio = newval->value;
1423 bond_3ad_update_ad_actor_settings(bond);
1424
1425 return 0;
1426}
1427
1428static int bond_option_ad_actor_system_set(struct bonding *bond,
1429 const struct bond_opt_value *newval)
1430{
1431 u8 macaddr[ETH_ALEN];
1432 u8 *mac;
1433 int i;
1434
1435 if (newval->string) {
1436 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1437 &macaddr[0], &macaddr[1], &macaddr[2],
1438 &macaddr[3], &macaddr[4], &macaddr[5]);
1439 if (i != ETH_ALEN)
1440 goto err;
1441 mac = macaddr;
1442 } else {
1443 mac = (u8 *)&newval->value;
1444 }
1445
1446 if (!is_valid_ether_addr(mac))
1447 goto err;
1448
1449 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1450 ether_addr_copy(bond->params.ad_actor_system, mac);
1451 bond_3ad_update_ad_actor_settings(bond);
1452
1453 return 0;
1454
1455err:
1456 netdev_err(bond->dev, "Invalid MAC address.\n");
1457 return -EINVAL;
1458}
1459
1460static int bond_option_ad_user_port_key_set(struct bonding *bond,
1461 const struct bond_opt_value *newval)
1462{
1463 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1464 newval->value);
1465
1466 bond->params.ad_user_port_key = newval->value;
1467 return 0;
1468}
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