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