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Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
[cris-mirror.git] / drivers / net / bonding / bond_options.c
blob58c705f24f963f98a4fa9181f18ac04f4af1d616
1 /*
2 * drivers/net/bond/bond_options.c - bonding options
3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
4 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #include <linux/errno.h>
13 #include <linux/if.h>
14 #include <linux/netdevice.h>
15 #include <linux/spinlock.h>
16 #include <linux/rcupdate.h>
17 #include <linux/ctype.h>
18 #include <linux/inet.h>
19 #include <linux/sched/signal.h>
20
21 #include <net/bonding.h>
22
23 static int bond_option_active_slave_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25 static int bond_option_miimon_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27 static int bond_option_updelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29 static int bond_option_downdelay_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31 static int bond_option_use_carrier_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33 static int bond_option_arp_interval_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
36 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
37 static int bond_option_arp_ip_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_arp_validate_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_arp_all_targets_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_primary_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_primary_reselect_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_fail_over_mac_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_resend_igmp_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_num_peer_notif_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_all_slaves_active_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_min_links_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_lp_interval_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_pps_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_lacp_rate_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_ad_select_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_queue_id_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_mode_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_slaves_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77 static int bond_option_ad_actor_system_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79 static int bond_option_ad_user_port_key_set(struct bonding *bond,
80 const struct bond_opt_value *newval);
81
82
83 static const struct bond_opt_value bond_mode_tbl[] = {
84 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
85 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
86 { "balance-xor", BOND_MODE_XOR, 0},
87 { "broadcast", BOND_MODE_BROADCAST, 0},
88 { "802.3ad", BOND_MODE_8023AD, 0},
89 { "balance-tlb", BOND_MODE_TLB, 0},
90 { "balance-alb", BOND_MODE_ALB, 0},
91 { NULL, -1, 0},
92 };
93
94 static const struct bond_opt_value bond_pps_tbl[] = {
95 { "default", 1, BOND_VALFLAG_DEFAULT},
96 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
97 { NULL, -1, 0},
98 };
99
100 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
101 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
102 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
103 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
104 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
105 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
106 { NULL, -1, 0},
107 };
108
109 static const struct bond_opt_value bond_arp_validate_tbl[] = {
110 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
111 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
112 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
113 { "all", BOND_ARP_VALIDATE_ALL, 0},
114 { "filter", BOND_ARP_FILTER, 0},
115 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
116 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
117 { NULL, -1, 0},
118 };
119
120 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
121 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
122 { "all", BOND_ARP_TARGETS_ALL, 0},
123 { NULL, -1, 0},
124 };
125
126 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
127 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
128 { "active", BOND_FOM_ACTIVE, 0},
129 { "follow", BOND_FOM_FOLLOW, 0},
130 { NULL, -1, 0},
131 };
132
133 static const struct bond_opt_value bond_intmax_tbl[] = {
134 { "off", 0, BOND_VALFLAG_DEFAULT},
135 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
136 { NULL, -1, 0}
137 };
138
139 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
140 { "slow", AD_LACP_SLOW, 0},
141 { "fast", AD_LACP_FAST, 0},
142 { NULL, -1, 0},
143 };
144
145 static const struct bond_opt_value bond_ad_select_tbl[] = {
146 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
147 { "bandwidth", BOND_AD_BANDWIDTH, 0},
148 { "count", BOND_AD_COUNT, 0},
149 { NULL, -1, 0},
150 };
151
152 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
153 { "off", 0, 0},
154 { "maxval", 255, BOND_VALFLAG_MAX},
155 { "default", 1, BOND_VALFLAG_DEFAULT},
156 { NULL, -1, 0}
157 };
158
159 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
160 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
161 { "better", BOND_PRI_RESELECT_BETTER, 0},
162 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
163 { NULL, -1},
164 };
165
166 static const struct bond_opt_value bond_use_carrier_tbl[] = {
167 { "off", 0, 0},
168 { "on", 1, BOND_VALFLAG_DEFAULT},
169 { NULL, -1, 0}
170 };
171
172 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
173 { "off", 0, BOND_VALFLAG_DEFAULT},
174 { "on", 1, 0},
175 { NULL, -1, 0}
176 };
177
178 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
179 { "off", 0, 0},
180 { "maxval", 255, BOND_VALFLAG_MAX},
181 { "default", 1, BOND_VALFLAG_DEFAULT},
182 { NULL, -1, 0}
183 };
184
185 static const struct bond_opt_value bond_lp_interval_tbl[] = {
186 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
187 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
188 { NULL, -1, 0},
189 };
190
191 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
192 { "off", 0, 0},
193 { "on", 1, BOND_VALFLAG_DEFAULT},
194 { NULL, -1, 0}
195 };
196
197 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
198 { "minval", 1, BOND_VALFLAG_MIN},
199 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
200 { NULL, -1, 0},
201 };
202
203 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
204 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
205 { "maxval", 1023, BOND_VALFLAG_MAX},
206 { NULL, -1, 0},
207 };
208
209 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
210 [BOND_OPT_MODE] = {
211 .id = BOND_OPT_MODE,
212 .name = "mode",
213 .desc = "bond device mode",
214 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
215 .values = bond_mode_tbl,
216 .set = bond_option_mode_set
217 },
218 [BOND_OPT_PACKETS_PER_SLAVE] = {
219 .id = BOND_OPT_PACKETS_PER_SLAVE,
220 .name = "packets_per_slave",
221 .desc = "Packets to send per slave in RR mode",
222 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
223 .values = bond_pps_tbl,
224 .set = bond_option_pps_set
225 },
226 [BOND_OPT_XMIT_HASH] = {
227 .id = BOND_OPT_XMIT_HASH,
228 .name = "xmit_hash_policy",
229 .desc = "balance-xor, 802.3ad, and tlb hashing method",
230 .values = bond_xmit_hashtype_tbl,
231 .set = bond_option_xmit_hash_policy_set
232 },
233 [BOND_OPT_ARP_VALIDATE] = {
234 .id = BOND_OPT_ARP_VALIDATE,
235 .name = "arp_validate",
236 .desc = "validate src/dst of ARP probes",
237 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
238 BIT(BOND_MODE_ALB),
239 .values = bond_arp_validate_tbl,
240 .set = bond_option_arp_validate_set
241 },
242 [BOND_OPT_ARP_ALL_TARGETS] = {
243 .id = BOND_OPT_ARP_ALL_TARGETS,
244 .name = "arp_all_targets",
245 .desc = "fail on any/all arp targets timeout",
246 .values = bond_arp_all_targets_tbl,
247 .set = bond_option_arp_all_targets_set
248 },
249 [BOND_OPT_FAIL_OVER_MAC] = {
250 .id = BOND_OPT_FAIL_OVER_MAC,
251 .name = "fail_over_mac",
252 .desc = "For active-backup, do not set all slaves to the same MAC",
253 .flags = BOND_OPTFLAG_NOSLAVES,
254 .values = bond_fail_over_mac_tbl,
255 .set = bond_option_fail_over_mac_set
256 },
257 [BOND_OPT_ARP_INTERVAL] = {
258 .id = BOND_OPT_ARP_INTERVAL,
259 .name = "arp_interval",
260 .desc = "arp interval in milliseconds",
261 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
262 BIT(BOND_MODE_ALB),
263 .values = bond_intmax_tbl,
264 .set = bond_option_arp_interval_set
265 },
266 [BOND_OPT_ARP_TARGETS] = {
267 .id = BOND_OPT_ARP_TARGETS,
268 .name = "arp_ip_target",
269 .desc = "arp targets in n.n.n.n form",
270 .flags = BOND_OPTFLAG_RAWVAL,
271 .set = bond_option_arp_ip_targets_set
272 },
273 [BOND_OPT_DOWNDELAY] = {
274 .id = BOND_OPT_DOWNDELAY,
275 .name = "downdelay",
276 .desc = "Delay before considering link down, in milliseconds",
277 .values = bond_intmax_tbl,
278 .set = bond_option_downdelay_set
279 },
280 [BOND_OPT_UPDELAY] = {
281 .id = BOND_OPT_UPDELAY,
282 .name = "updelay",
283 .desc = "Delay before considering link up, in milliseconds",
284 .values = bond_intmax_tbl,
285 .set = bond_option_updelay_set
286 },
287 [BOND_OPT_LACP_RATE] = {
288 .id = BOND_OPT_LACP_RATE,
289 .name = "lacp_rate",
290 .desc = "LACPDU tx rate to request from 802.3ad partner",
291 .flags = BOND_OPTFLAG_IFDOWN,
292 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
293 .values = bond_lacp_rate_tbl,
294 .set = bond_option_lacp_rate_set
295 },
296 [BOND_OPT_MINLINKS] = {
297 .id = BOND_OPT_MINLINKS,
298 .name = "min_links",
299 .desc = "Minimum number of available links before turning on carrier",
300 .values = bond_intmax_tbl,
301 .set = bond_option_min_links_set
302 },
303 [BOND_OPT_AD_SELECT] = {
304 .id = BOND_OPT_AD_SELECT,
305 .name = "ad_select",
306 .desc = "803.ad aggregation selection logic",
307 .flags = BOND_OPTFLAG_IFDOWN,
308 .values = bond_ad_select_tbl,
309 .set = bond_option_ad_select_set
310 },
311 [BOND_OPT_NUM_PEER_NOTIF] = {
312 .id = BOND_OPT_NUM_PEER_NOTIF,
313 .name = "num_unsol_na",
314 .desc = "Number of peer notifications to send on failover event",
315 .values = bond_num_peer_notif_tbl,
316 .set = bond_option_num_peer_notif_set
317 },
318 [BOND_OPT_MIIMON] = {
319 .id = BOND_OPT_MIIMON,
320 .name = "miimon",
321 .desc = "Link check interval in milliseconds",
322 .values = bond_intmax_tbl,
323 .set = bond_option_miimon_set
324 },
325 [BOND_OPT_PRIMARY] = {
326 .id = BOND_OPT_PRIMARY,
327 .name = "primary",
328 .desc = "Primary network device to use",
329 .flags = BOND_OPTFLAG_RAWVAL,
330 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
331 BIT(BOND_MODE_TLB) |
332 BIT(BOND_MODE_ALB)),
333 .set = bond_option_primary_set
334 },
335 [BOND_OPT_PRIMARY_RESELECT] = {
336 .id = BOND_OPT_PRIMARY_RESELECT,
337 .name = "primary_reselect",
338 .desc = "Reselect primary slave once it comes up",
339 .values = bond_primary_reselect_tbl,
340 .set = bond_option_primary_reselect_set
341 },
342 [BOND_OPT_USE_CARRIER] = {
343 .id = BOND_OPT_USE_CARRIER,
344 .name = "use_carrier",
345 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
346 .values = bond_use_carrier_tbl,
347 .set = bond_option_use_carrier_set
348 },
349 [BOND_OPT_ACTIVE_SLAVE] = {
350 .id = BOND_OPT_ACTIVE_SLAVE,
351 .name = "active_slave",
352 .desc = "Currently active slave",
353 .flags = BOND_OPTFLAG_RAWVAL,
354 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
355 BIT(BOND_MODE_TLB) |
356 BIT(BOND_MODE_ALB)),
357 .set = bond_option_active_slave_set
358 },
359 [BOND_OPT_QUEUE_ID] = {
360 .id = BOND_OPT_QUEUE_ID,
361 .name = "queue_id",
362 .desc = "Set queue id of a slave",
363 .flags = BOND_OPTFLAG_RAWVAL,
364 .set = bond_option_queue_id_set
365 },
366 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
367 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
368 .name = "all_slaves_active",
369 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
370 .values = bond_all_slaves_active_tbl,
371 .set = bond_option_all_slaves_active_set
372 },
373 [BOND_OPT_RESEND_IGMP] = {
374 .id = BOND_OPT_RESEND_IGMP,
375 .name = "resend_igmp",
376 .desc = "Number of IGMP membership reports to send on link failure",
377 .values = bond_resend_igmp_tbl,
378 .set = bond_option_resend_igmp_set
379 },
380 [BOND_OPT_LP_INTERVAL] = {
381 .id = BOND_OPT_LP_INTERVAL,
382 .name = "lp_interval",
383 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
384 .values = bond_lp_interval_tbl,
385 .set = bond_option_lp_interval_set
386 },
387 [BOND_OPT_SLAVES] = {
388 .id = BOND_OPT_SLAVES,
389 .name = "slaves",
390 .desc = "Slave membership management",
391 .flags = BOND_OPTFLAG_RAWVAL,
392 .set = bond_option_slaves_set
393 },
394 [BOND_OPT_TLB_DYNAMIC_LB] = {
395 .id = BOND_OPT_TLB_DYNAMIC_LB,
396 .name = "tlb_dynamic_lb",
397 .desc = "Enable dynamic flow shuffling",
398 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
399 .values = bond_tlb_dynamic_lb_tbl,
400 .flags = BOND_OPTFLAG_IFDOWN,
401 .set = bond_option_tlb_dynamic_lb_set,
402 },
403 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
404 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
405 .name = "ad_actor_sys_prio",
406 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
407 .values = bond_ad_actor_sys_prio_tbl,
408 .set = bond_option_ad_actor_sys_prio_set,
409 },
410 [BOND_OPT_AD_ACTOR_SYSTEM] = {
411 .id = BOND_OPT_AD_ACTOR_SYSTEM,
412 .name = "ad_actor_system",
413 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
414 .flags = BOND_OPTFLAG_RAWVAL,
415 .set = bond_option_ad_actor_system_set,
416 },
417 [BOND_OPT_AD_USER_PORT_KEY] = {
418 .id = BOND_OPT_AD_USER_PORT_KEY,
419 .name = "ad_user_port_key",
420 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
421 .flags = BOND_OPTFLAG_IFDOWN,
422 .values = bond_ad_user_port_key_tbl,
423 .set = bond_option_ad_user_port_key_set,
424 },
425 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
426 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
427 .name = "num_grat_arp",
428 .desc = "Number of peer notifications to send on failover event",
429 .values = bond_num_peer_notif_tbl,
430 .set = bond_option_num_peer_notif_set
431 }
432 };
433
434 /* Searches for an option by name */
435 const struct bond_option *bond_opt_get_by_name(const char *name)
436 {
437 const struct bond_option *opt;
438 int option;
439
440 for (option = 0; option < BOND_OPT_LAST; option++) {
441 opt = bond_opt_get(option);
442 if (opt && !strcmp(opt->name, name))
443 return opt;
444 }
445
446 return NULL;
447 }
448
449 /* Searches for a value in opt's values[] table */
450 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
451 {
452 const struct bond_option *opt;
453 int i;
454
455 opt = bond_opt_get(option);
456 if (WARN_ON(!opt))
457 return NULL;
458 for (i = 0; opt->values && opt->values[i].string; i++)
459 if (opt->values[i].value == val)
460 return &opt->values[i];
461
462 return NULL;
463 }
464
465 /* Searches for a value in opt's values[] table which matches the flagmask */
466 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
467 u32 flagmask)
468 {
469 int i;
470
471 for (i = 0; opt->values && opt->values[i].string; i++)
472 if (opt->values[i].flags & flagmask)
473 return &opt->values[i];
474
475 return NULL;
476 }
477
478 /* If maxval is missing then there's no range to check. In case minval is
479 * missing then it's considered to be 0.
480 */
481 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
482 {
483 const struct bond_opt_value *minval, *maxval;
484
485 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
486 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
487 if (!maxval || (minval && val < minval->value) || val > maxval->value)
488 return false;
489
490 return true;
491 }
492
493 /**
494 * bond_opt_parse - parse option value
495 * @opt: the option to parse against
496 * @val: value to parse
497 *
498 * This function tries to extract the value from @val and check if it's
499 * a possible match for the option and returns NULL if a match isn't found,
500 * or the struct_opt_value that matched. It also strips the new line from
501 * @val->string if it's present.
502 */
503 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
504 struct bond_opt_value *val)
505 {
506 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
507 const struct bond_opt_value *tbl;
508 const struct bond_opt_value *ret = NULL;
509 bool checkval;
510 int i, rv;
511
512 /* No parsing if the option wants a raw val */
513 if (opt->flags & BOND_OPTFLAG_RAWVAL)
514 return val;
515
516 tbl = opt->values;
517 if (!tbl)
518 goto out;
519
520 /* ULLONG_MAX is used to bypass string processing */
521 checkval = val->value != ULLONG_MAX;
522 if (!checkval) {
523 if (!val->string)
524 goto out;
525 p = strchr(val->string, '\n');
526 if (p)
527 *p = '\0';
528 for (p = val->string; *p; p++)
529 if (!(isdigit(*p) || isspace(*p)))
530 break;
531 /* The following code extracts the string to match or the value
532 * and sets checkval appropriately
533 */
534 if (*p) {
535 rv = sscanf(val->string, "%32s", valstr);
536 } else {
537 rv = sscanf(val->string, "%llu", &val->value);
538 checkval = true;
539 }
540 if (!rv)
541 goto out;
542 }
543
544 for (i = 0; tbl[i].string; i++) {
545 /* Check for exact match */
546 if (checkval) {
547 if (val->value == tbl[i].value)
548 ret = &tbl[i];
549 } else {
550 if (!strcmp(valstr, "default") &&
551 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
552 ret = &tbl[i];
553
554 if (!strcmp(valstr, tbl[i].string))
555 ret = &tbl[i];
556 }
557 /* Found an exact match */
558 if (ret)
559 goto out;
560 }
561 /* Possible range match */
562 if (checkval && bond_opt_check_range(opt, val->value))
563 ret = val;
564 out:
565 return ret;
566 }
567
568 /* Check opt's dependencies against bond mode and currently set options */
569 static int bond_opt_check_deps(struct bonding *bond,
570 const struct bond_option *opt)
571 {
572 struct bond_params *params = &bond->params;
573
574 if (test_bit(params->mode, &opt->unsuppmodes))
575 return -EACCES;
576 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
577 return -ENOTEMPTY;
578 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
579 return -EBUSY;
580
581 return 0;
582 }
583
584 static void bond_opt_dep_print(struct bonding *bond,
585 const struct bond_option *opt)
586 {
587 const struct bond_opt_value *modeval;
588 struct bond_params *params;
589
590 params = &bond->params;
591 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
592 if (test_bit(params->mode, &opt->unsuppmodes))
593 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
594 opt->name, modeval->string, modeval->value);
595 }
596
597 static void bond_opt_error_interpret(struct bonding *bond,
598 const struct bond_option *opt,
599 int error, const struct bond_opt_value *val)
600 {
601 const struct bond_opt_value *minval, *maxval;
602 char *p;
603
604 switch (error) {
605 case -EINVAL:
606 if (val) {
607 if (val->string) {
608 /* sometimes RAWVAL opts may have new lines */
609 p = strchr(val->string, '\n');
610 if (p)
611 *p = '\0';
612 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
613 opt->name, val->string);
614 } else {
615 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
616 opt->name, val->value);
617 }
618 }
619 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
620 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
621 if (!maxval)
622 break;
623 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
624 opt->name, minval ? minval->value : 0, maxval->value);
625 break;
626 case -EACCES:
627 bond_opt_dep_print(bond, opt);
628 break;
629 case -ENOTEMPTY:
630 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
631 opt->name);
632 break;
633 case -EBUSY:
634 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
635 opt->name);
636 break;
637 default:
638 break;
639 }
640 }
641
642 /**
643 * __bond_opt_set - set a bonding option
644 * @bond: target bond device
645 * @option: option to set
646 * @val: value to set it to
647 *
648 * This function is used to change the bond's option value, it can be
649 * used for both enabling/changing an option and for disabling it. RTNL lock
650 * must be obtained before calling this function.
651 */
652 int __bond_opt_set(struct bonding *bond,
653 unsigned int option, struct bond_opt_value *val)
654 {
655 const struct bond_opt_value *retval = NULL;
656 const struct bond_option *opt;
657 int ret = -ENOENT;
658
659 ASSERT_RTNL();
660
661 opt = bond_opt_get(option);
662 if (WARN_ON(!val) || WARN_ON(!opt))
663 goto out;
664 ret = bond_opt_check_deps(bond, opt);
665 if (ret)
666 goto out;
667 retval = bond_opt_parse(opt, val);
668 if (!retval) {
669 ret = -EINVAL;
670 goto out;
671 }
672 ret = opt->set(bond, retval);
673 out:
674 if (ret)
675 bond_opt_error_interpret(bond, opt, ret, val);
676
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 */
690 int __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 */
714 int 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 */
735 const 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
743 static int bond_option_mode_set(struct bonding *bond,
744 const struct bond_opt_value *newval)
745 {
746 if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) {
747 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
748 newval->string);
749 /* disable arp monitoring */
750 bond->params.arp_interval = 0;
751 /* set miimon to default value */
752 bond->params.miimon = BOND_DEFAULT_MIIMON;
753 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
754 bond->params.miimon);
755 }
756
757 if (newval->value == BOND_MODE_ALB)
758 bond->params.tlb_dynamic_lb = 1;
759
760 /* don't cache arp_validate between modes */
761 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
762 bond->params.mode = newval->value;
763
764 return 0;
765 }
766
767 static int bond_option_active_slave_set(struct bonding *bond,
768 const struct bond_opt_value *newval)
769 {
770 char ifname[IFNAMSIZ] = { 0, };
771 struct net_device *slave_dev;
772 int ret = 0;
773
774 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
775 if (!strlen(ifname) || newval->string[0] == '\n') {
776 slave_dev = NULL;
777 } else {
778 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
779 if (!slave_dev)
780 return -ENODEV;
781 }
782
783 if (slave_dev) {
784 if (!netif_is_bond_slave(slave_dev)) {
785 netdev_err(bond->dev, "Device %s is not bonding slave\n",
786 slave_dev->name);
787 return -EINVAL;
788 }
789
790 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
791 netdev_err(bond->dev, "Device %s is not our slave\n",
792 slave_dev->name);
793 return -EINVAL;
794 }
795 }
796
797 block_netpoll_tx();
798 /* check to see if we are clearing active */
799 if (!slave_dev) {
800 netdev_dbg(bond->dev, "Clearing current active slave\n");
801 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
802 bond_select_active_slave(bond);
803 } else {
804 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
805 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
806
807 BUG_ON(!new_active);
808
809 if (new_active == old_active) {
810 /* do nothing */
811 netdev_dbg(bond->dev, "%s is already the current active slave\n",
812 new_active->dev->name);
813 } else {
814 if (old_active && (new_active->link == BOND_LINK_UP) &&
815 bond_slave_is_up(new_active)) {
816 netdev_dbg(bond->dev, "Setting %s as active slave\n",
817 new_active->dev->name);
818 bond_change_active_slave(bond, new_active);
819 } else {
820 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
821 new_active->dev->name,
822 new_active->dev->name);
823 ret = -EINVAL;
824 }
825 }
826 }
827 unblock_netpoll_tx();
828
829 return ret;
830 }
831
832 /* There are two tricky bits here. First, if MII monitoring is activated, then
833 * we must disable ARP monitoring. Second, if the timer isn't running, we must
834 * start it.
835 */
836 static int bond_option_miimon_set(struct bonding *bond,
837 const struct bond_opt_value *newval)
838 {
839 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
840 newval->value);
841 bond->params.miimon = newval->value;
842 if (bond->params.updelay)
843 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
844 bond->params.updelay * bond->params.miimon);
845 if (bond->params.downdelay)
846 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
847 bond->params.downdelay * bond->params.miimon);
848 if (newval->value && bond->params.arp_interval) {
849 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
850 bond->params.arp_interval = 0;
851 if (bond->params.arp_validate)
852 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
853 }
854 if (bond->dev->flags & IFF_UP) {
855 /* If the interface is up, we may need to fire off
856 * the MII timer. If the interface is down, the
857 * timer will get fired off when the open function
858 * is called.
859 */
860 if (!newval->value) {
861 cancel_delayed_work_sync(&bond->mii_work);
862 } else {
863 cancel_delayed_work_sync(&bond->arp_work);
864 queue_delayed_work(bond->wq, &bond->mii_work, 0);
865 }
866 }
867
868 return 0;
869 }
870
871 /* Set up and down delays. These must be multiples of the
872 * MII monitoring value, and are stored internally as the multiplier.
873 * Thus, we must translate to MS for the real world.
874 */
875 static int bond_option_updelay_set(struct bonding *bond,
876 const struct bond_opt_value *newval)
877 {
878 int value = newval->value;
879
880 if (!bond->params.miimon) {
881 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
882 return -EPERM;
883 }
884 if ((value % bond->params.miimon) != 0) {
885 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
886 value, bond->params.miimon,
887 (value / bond->params.miimon) *
888 bond->params.miimon);
889 }
890 bond->params.updelay = value / bond->params.miimon;
891 netdev_dbg(bond->dev, "Setting up delay to %d\n",
892 bond->params.updelay * bond->params.miimon);
893
894 return 0;
895 }
896
897 static int bond_option_downdelay_set(struct bonding *bond,
898 const struct bond_opt_value *newval)
899 {
900 int value = newval->value;
901
902 if (!bond->params.miimon) {
903 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
904 return -EPERM;
905 }
906 if ((value % bond->params.miimon) != 0) {
907 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
908 value, bond->params.miimon,
909 (value / bond->params.miimon) *
910 bond->params.miimon);
911 }
912 bond->params.downdelay = value / bond->params.miimon;
913 netdev_dbg(bond->dev, "Setting down delay to %d\n",
914 bond->params.downdelay * bond->params.miimon);
915
916 return 0;
917 }
918
919 static int bond_option_use_carrier_set(struct bonding *bond,
920 const struct bond_opt_value *newval)
921 {
922 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
923 newval->value);
924 bond->params.use_carrier = newval->value;
925
926 return 0;
927 }
928
929 /* There are two tricky bits here. First, if ARP monitoring is activated, then
930 * we must disable MII monitoring. Second, if the ARP timer isn't running,
931 * we must start it.
932 */
933 static int bond_option_arp_interval_set(struct bonding *bond,
934 const struct bond_opt_value *newval)
935 {
936 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
937 newval->value);
938 bond->params.arp_interval = newval->value;
939 if (newval->value) {
940 if (bond->params.miimon) {
941 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
942 bond->params.miimon = 0;
943 }
944 if (!bond->params.arp_targets[0])
945 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
946 }
947 if (bond->dev->flags & IFF_UP) {
948 /* If the interface is up, we may need to fire off
949 * the ARP timer. If the interface is down, the
950 * timer will get fired off when the open function
951 * is called.
952 */
953 if (!newval->value) {
954 if (bond->params.arp_validate)
955 bond->recv_probe = NULL;
956 cancel_delayed_work_sync(&bond->arp_work);
957 } else {
958 /* arp_validate can be set only in active-backup mode */
959 bond->recv_probe = bond_arp_rcv;
960 cancel_delayed_work_sync(&bond->mii_work);
961 queue_delayed_work(bond->wq, &bond->arp_work, 0);
962 }
963 }
964
965 return 0;
966 }
967
968 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
969 __be32 target,
970 unsigned long last_rx)
971 {
972 __be32 *targets = bond->params.arp_targets;
973 struct list_head *iter;
974 struct slave *slave;
975
976 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
977 bond_for_each_slave(bond, slave, iter)
978 slave->target_last_arp_rx[slot] = last_rx;
979 targets[slot] = target;
980 }
981 }
982
983 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
984 {
985 __be32 *targets = bond->params.arp_targets;
986 int ind;
987
988 if (!bond_is_ip_target_ok(target)) {
989 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
990 &target);
991 return -EINVAL;
992 }
993
994 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
995 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
996 &target);
997 return -EINVAL;
998 }
999
1000 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1001 if (ind == -1) {
1002 netdev_err(bond->dev, "ARP target table is full!\n");
1003 return -EINVAL;
1004 }
1005
1006 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1007
1008 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1009
1010 return 0;
1011 }
1012
1013 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1014 {
1015 return _bond_option_arp_ip_target_add(bond, target);
1016 }
1017
1018 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1019 {
1020 __be32 *targets = bond->params.arp_targets;
1021 struct list_head *iter;
1022 struct slave *slave;
1023 unsigned long *targets_rx;
1024 int ind, i;
1025
1026 if (!bond_is_ip_target_ok(target)) {
1027 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1028 &target);
1029 return -EINVAL;
1030 }
1031
1032 ind = bond_get_targets_ip(targets, target);
1033 if (ind == -1) {
1034 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1035 &target);
1036 return -EINVAL;
1037 }
1038
1039 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1040 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1041
1042 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1043
1044 bond_for_each_slave(bond, slave, iter) {
1045 targets_rx = slave->target_last_arp_rx;
1046 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1047 targets_rx[i] = targets_rx[i+1];
1048 targets_rx[i] = 0;
1049 }
1050 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1051 targets[i] = targets[i+1];
1052 targets[i] = 0;
1053
1054 return 0;
1055 }
1056
1057 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1058 {
1059 int i;
1060
1061 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1062 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1063 }
1064
1065 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1066 const struct bond_opt_value *newval)
1067 {
1068 int ret = -EPERM;
1069 __be32 target;
1070
1071 if (newval->string) {
1072 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1073 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1074 &target);
1075 return ret;
1076 }
1077 if (newval->string[0] == '+')
1078 ret = bond_option_arp_ip_target_add(bond, target);
1079 else if (newval->string[0] == '-')
1080 ret = bond_option_arp_ip_target_rem(bond, target);
1081 else
1082 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1083 } else {
1084 target = newval->value;
1085 ret = bond_option_arp_ip_target_add(bond, target);
1086 }
1087
1088 return ret;
1089 }
1090
1091 static int bond_option_arp_validate_set(struct bonding *bond,
1092 const struct bond_opt_value *newval)
1093 {
1094 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1095 newval->string, newval->value);
1096
1097 if (bond->dev->flags & IFF_UP) {
1098 if (!newval->value)
1099 bond->recv_probe = NULL;
1100 else if (bond->params.arp_interval)
1101 bond->recv_probe = bond_arp_rcv;
1102 }
1103 bond->params.arp_validate = newval->value;
1104
1105 return 0;
1106 }
1107
1108 static int bond_option_arp_all_targets_set(struct bonding *bond,
1109 const struct bond_opt_value *newval)
1110 {
1111 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1112 newval->string, newval->value);
1113 bond->params.arp_all_targets = newval->value;
1114
1115 return 0;
1116 }
1117
1118 static int bond_option_primary_set(struct bonding *bond,
1119 const struct bond_opt_value *newval)
1120 {
1121 char *p, *primary = newval->string;
1122 struct list_head *iter;
1123 struct slave *slave;
1124
1125 block_netpoll_tx();
1126
1127 p = strchr(primary, '\n');
1128 if (p)
1129 *p = '\0';
1130 /* check to see if we are clearing primary */
1131 if (!strlen(primary)) {
1132 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1133 RCU_INIT_POINTER(bond->primary_slave, NULL);
1134 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1135 bond_select_active_slave(bond);
1136 goto out;
1137 }
1138
1139 bond_for_each_slave(bond, slave, iter) {
1140 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1141 netdev_dbg(bond->dev, "Setting %s as primary slave\n",
1142 slave->dev->name);
1143 rcu_assign_pointer(bond->primary_slave, slave);
1144 strcpy(bond->params.primary, slave->dev->name);
1145 bond_select_active_slave(bond);
1146 goto out;
1147 }
1148 }
1149
1150 if (rtnl_dereference(bond->primary_slave)) {
1151 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1152 RCU_INIT_POINTER(bond->primary_slave, NULL);
1153 bond_select_active_slave(bond);
1154 }
1155 strncpy(bond->params.primary, primary, IFNAMSIZ);
1156 bond->params.primary[IFNAMSIZ - 1] = 0;
1157
1158 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1159 primary, bond->dev->name);
1160
1161 out:
1162 unblock_netpoll_tx();
1163
1164 return 0;
1165 }
1166
1167 static int bond_option_primary_reselect_set(struct bonding *bond,
1168 const struct bond_opt_value *newval)
1169 {
1170 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1171 newval->string, newval->value);
1172 bond->params.primary_reselect = newval->value;
1173
1174 block_netpoll_tx();
1175 bond_select_active_slave(bond);
1176 unblock_netpoll_tx();
1177
1178 return 0;
1179 }
1180
1181 static int bond_option_fail_over_mac_set(struct bonding *bond,
1182 const struct bond_opt_value *newval)
1183 {
1184 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1185 newval->string, newval->value);
1186 bond->params.fail_over_mac = newval->value;
1187
1188 return 0;
1189 }
1190
1191 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1192 const struct bond_opt_value *newval)
1193 {
1194 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1195 newval->string, newval->value);
1196 bond->params.xmit_policy = newval->value;
1197
1198 return 0;
1199 }
1200
1201 static int bond_option_resend_igmp_set(struct bonding *bond,
1202 const struct bond_opt_value *newval)
1203 {
1204 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1205 newval->value);
1206 bond->params.resend_igmp = newval->value;
1207
1208 return 0;
1209 }
1210
1211 static int bond_option_num_peer_notif_set(struct bonding *bond,
1212 const struct bond_opt_value *newval)
1213 {
1214 bond->params.num_peer_notif = newval->value;
1215
1216 return 0;
1217 }
1218
1219 static int bond_option_all_slaves_active_set(struct bonding *bond,
1220 const struct bond_opt_value *newval)
1221 {
1222 struct list_head *iter;
1223 struct slave *slave;
1224
1225 if (newval->value == bond->params.all_slaves_active)
1226 return 0;
1227 bond->params.all_slaves_active = newval->value;
1228 bond_for_each_slave(bond, slave, iter) {
1229 if (!bond_is_active_slave(slave)) {
1230 if (newval->value)
1231 slave->inactive = 0;
1232 else
1233 slave->inactive = 1;
1234 }
1235 }
1236
1237 return 0;
1238 }
1239
1240 static int bond_option_min_links_set(struct bonding *bond,
1241 const struct bond_opt_value *newval)
1242 {
1243 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1244 newval->value);
1245 bond->params.min_links = newval->value;
1246 bond_set_carrier(bond);
1247
1248 return 0;
1249 }
1250
1251 static int bond_option_lp_interval_set(struct bonding *bond,
1252 const struct bond_opt_value *newval)
1253 {
1254 bond->params.lp_interval = newval->value;
1255
1256 return 0;
1257 }
1258
1259 static int bond_option_pps_set(struct bonding *bond,
1260 const struct bond_opt_value *newval)
1261 {
1262 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1263 newval->value);
1264 bond->params.packets_per_slave = newval->value;
1265 if (newval->value > 0) {
1266 bond->params.reciprocal_packets_per_slave =
1267 reciprocal_value(newval->value);
1268 } else {
1269 /* reciprocal_packets_per_slave is unused if
1270 * packets_per_slave is 0 or 1, just initialize it
1271 */
1272 bond->params.reciprocal_packets_per_slave =
1273 (struct reciprocal_value) { 0 };
1274 }
1275
1276 return 0;
1277 }
1278
1279 static int bond_option_lacp_rate_set(struct bonding *bond,
1280 const struct bond_opt_value *newval)
1281 {
1282 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1283 newval->string, newval->value);
1284 bond->params.lacp_fast = newval->value;
1285 bond_3ad_update_lacp_rate(bond);
1286
1287 return 0;
1288 }
1289
1290 static int bond_option_ad_select_set(struct bonding *bond,
1291 const struct bond_opt_value *newval)
1292 {
1293 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1294 newval->string, newval->value);
1295 bond->params.ad_select = newval->value;
1296
1297 return 0;
1298 }
1299
1300 static int bond_option_queue_id_set(struct bonding *bond,
1301 const struct bond_opt_value *newval)
1302 {
1303 struct slave *slave, *update_slave;
1304 struct net_device *sdev;
1305 struct list_head *iter;
1306 char *delim;
1307 int ret = 0;
1308 u16 qid;
1309
1310 /* delim will point to queue id if successful */
1311 delim = strchr(newval->string, ':');
1312 if (!delim)
1313 goto err_no_cmd;
1314
1315 /* Terminate string that points to device name and bump it
1316 * up one, so we can read the queue id there.
1317 */
1318 *delim = '\0';
1319 if (sscanf(++delim, "%hd\n", &qid) != 1)
1320 goto err_no_cmd;
1321
1322 /* Check buffer length, valid ifname and queue id */
1323 if (!dev_valid_name(newval->string) ||
1324 qid > bond->dev->real_num_tx_queues)
1325 goto err_no_cmd;
1326
1327 /* Get the pointer to that interface if it exists */
1328 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1329 if (!sdev)
1330 goto err_no_cmd;
1331
1332 /* Search for thes slave and check for duplicate qids */
1333 update_slave = NULL;
1334 bond_for_each_slave(bond, slave, iter) {
1335 if (sdev == slave->dev)
1336 /* We don't need to check the matching
1337 * slave for dups, since we're overwriting it
1338 */
1339 update_slave = slave;
1340 else if (qid && qid == slave->queue_id) {
1341 goto err_no_cmd;
1342 }
1343 }
1344
1345 if (!update_slave)
1346 goto err_no_cmd;
1347
1348 /* Actually set the qids for the slave */
1349 update_slave->queue_id = qid;
1350
1351 out:
1352 return ret;
1353
1354 err_no_cmd:
1355 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1356 ret = -EPERM;
1357 goto out;
1358
1359 }
1360
1361 static int bond_option_slaves_set(struct bonding *bond,
1362 const struct bond_opt_value *newval)
1363 {
1364 char command[IFNAMSIZ + 1] = { 0, };
1365 struct net_device *dev;
1366 char *ifname;
1367 int ret;
1368
1369 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1370 ifname = command + 1;
1371 if ((strlen(command) <= 1) ||
1372 !dev_valid_name(ifname))
1373 goto err_no_cmd;
1374
1375 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1376 if (!dev) {
1377 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1378 ifname);
1379 ret = -ENODEV;
1380 goto out;
1381 }
1382
1383 switch (command[0]) {
1384 case '+':
1385 netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
1386 ret = bond_enslave(bond->dev, dev, NULL);
1387 break;
1388
1389 case '-':
1390 netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
1391 ret = bond_release(bond->dev, dev);
1392 break;
1393
1394 default:
1395 goto err_no_cmd;
1396 }
1397
1398 out:
1399 return ret;
1400
1401 err_no_cmd:
1402 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1403 ret = -EPERM;
1404 goto out;
1405 }
1406
1407 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1408 const struct bond_opt_value *newval)
1409 {
1410 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1411 newval->string, newval->value);
1412 bond->params.tlb_dynamic_lb = newval->value;
1413
1414 return 0;
1415 }
1416
1417 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1418 const struct bond_opt_value *newval)
1419 {
1420 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1421 newval->value);
1422
1423 bond->params.ad_actor_sys_prio = newval->value;
1424 bond_3ad_update_ad_actor_settings(bond);
1425
1426 return 0;
1427 }
1428
1429 static int bond_option_ad_actor_system_set(struct bonding *bond,
1430 const struct bond_opt_value *newval)
1431 {
1432 u8 macaddr[ETH_ALEN];
1433 u8 *mac;
1434
1435 if (newval->string) {
1436 if (!mac_pton(newval->string, macaddr))
1437 goto err;
1438 mac = macaddr;
1439 } else {
1440 mac = (u8 *)&newval->value;
1441 }
1442
1443 if (!is_valid_ether_addr(mac))
1444 goto err;
1445
1446 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1447 ether_addr_copy(bond->params.ad_actor_system, mac);
1448 bond_3ad_update_ad_actor_settings(bond);
1449
1450 return 0;
1451
1452 err:
1453 netdev_err(bond->dev, "Invalid MAC address.\n");
1454 return -EINVAL;
1455 }
1456
1457 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1458 const struct bond_opt_value *newval)
1459 {
1460 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1461 newval->value);
1462
1463 bond->params.ad_user_port_key = newval->value;
1464 return 0;
1465 }
CRIS linux kernel tree