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