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Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszer...
[mirror_ubuntu-bionic-kernel.git] / drivers / net / bonding / bond_options.c
1 /*
2 * drivers/net/bond/bond_options.c - bonding options
3 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
4 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 */
11
12 #include <linux/errno.h>
13 #include <linux/if.h>
14 #include <linux/netdevice.h>
15 #include <linux/spinlock.h>
16 #include <linux/rcupdate.h>
17 #include <linux/ctype.h>
18 #include <linux/inet.h>
19 #include <linux/sched/signal.h>
20
21 #include <net/bonding.h>
22
23 static int bond_option_active_slave_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25 static int bond_option_miimon_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27 static int bond_option_updelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29 static int bond_option_downdelay_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31 static int bond_option_use_carrier_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33 static int bond_option_arp_interval_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
36 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
37 static int bond_option_arp_ip_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_arp_validate_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_arp_all_targets_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_primary_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_primary_reselect_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_fail_over_mac_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_resend_igmp_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_num_peer_notif_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_all_slaves_active_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_min_links_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_lp_interval_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_pps_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_lacp_rate_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_ad_select_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_queue_id_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_mode_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_slaves_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77 static int bond_option_ad_actor_system_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79 static int bond_option_ad_user_port_key_set(struct bonding *bond,
80 const struct bond_opt_value *newval);
81
82
83 static const struct bond_opt_value bond_mode_tbl[] = {
84 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
85 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
86 { "balance-xor", BOND_MODE_XOR, 0},
87 { "broadcast", BOND_MODE_BROADCAST, 0},
88 { "802.3ad", BOND_MODE_8023AD, 0},
89 { "balance-tlb", BOND_MODE_TLB, 0},
90 { "balance-alb", BOND_MODE_ALB, 0},
91 { NULL, -1, 0},
92 };
93
94 static const struct bond_opt_value bond_pps_tbl[] = {
95 { "default", 1, BOND_VALFLAG_DEFAULT},
96 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
97 { NULL, -1, 0},
98 };
99
100 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
101 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
102 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
103 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
104 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
105 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
106 { NULL, -1, 0},
107 };
108
109 static const struct bond_opt_value bond_arp_validate_tbl[] = {
110 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
111 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
112 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
113 { "all", BOND_ARP_VALIDATE_ALL, 0},
114 { "filter", BOND_ARP_FILTER, 0},
115 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
116 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
117 { NULL, -1, 0},
118 };
119
120 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
121 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
122 { "all", BOND_ARP_TARGETS_ALL, 0},
123 { NULL, -1, 0},
124 };
125
126 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
127 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
128 { "active", BOND_FOM_ACTIVE, 0},
129 { "follow", BOND_FOM_FOLLOW, 0},
130 { NULL, -1, 0},
131 };
132
133 static const struct bond_opt_value bond_intmax_tbl[] = {
134 { "off", 0, BOND_VALFLAG_DEFAULT},
135 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
136 { NULL, -1, 0}
137 };
138
139 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
140 { "slow", AD_LACP_SLOW, 0},
141 { "fast", AD_LACP_FAST, 0},
142 { NULL, -1, 0},
143 };
144
145 static const struct bond_opt_value bond_ad_select_tbl[] = {
146 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
147 { "bandwidth", BOND_AD_BANDWIDTH, 0},
148 { "count", BOND_AD_COUNT, 0},
149 { NULL, -1, 0},
150 };
151
152 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
153 { "off", 0, 0},
154 { "maxval", 255, BOND_VALFLAG_MAX},
155 { "default", 1, BOND_VALFLAG_DEFAULT},
156 { NULL, -1, 0}
157 };
158
159 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
160 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
161 { "better", BOND_PRI_RESELECT_BETTER, 0},
162 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
163 { NULL, -1},
164 };
165
166 static const struct bond_opt_value bond_use_carrier_tbl[] = {
167 { "off", 0, 0},
168 { "on", 1, BOND_VALFLAG_DEFAULT},
169 { NULL, -1, 0}
170 };
171
172 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
173 { "off", 0, BOND_VALFLAG_DEFAULT},
174 { "on", 1, 0},
175 { NULL, -1, 0}
176 };
177
178 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
179 { "off", 0, 0},
180 { "maxval", 255, BOND_VALFLAG_MAX},
181 { "default", 1, BOND_VALFLAG_DEFAULT},
182 { NULL, -1, 0}
183 };
184
185 static const struct bond_opt_value bond_lp_interval_tbl[] = {
186 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
187 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
188 { NULL, -1, 0},
189 };
190
191 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
192 { "off", 0, 0},
193 { "on", 1, BOND_VALFLAG_DEFAULT},
194 { NULL, -1, 0}
195 };
196
197 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
198 { "minval", 1, BOND_VALFLAG_MIN},
199 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
200 { NULL, -1, 0},
201 };
202
203 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
204 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
205 { "maxval", 1023, BOND_VALFLAG_MAX},
206 { NULL, -1, 0},
207 };
208
209 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
210 [BOND_OPT_MODE] = {
211 .id = BOND_OPT_MODE,
212 .name = "mode",
213 .desc = "bond device mode",
214 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
215 .values = bond_mode_tbl,
216 .set = bond_option_mode_set
217 },
218 [BOND_OPT_PACKETS_PER_SLAVE] = {
219 .id = BOND_OPT_PACKETS_PER_SLAVE,
220 .name = "packets_per_slave",
221 .desc = "Packets to send per slave in RR mode",
222 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
223 .values = bond_pps_tbl,
224 .set = bond_option_pps_set
225 },
226 [BOND_OPT_XMIT_HASH] = {
227 .id = BOND_OPT_XMIT_HASH,
228 .name = "xmit_hash_policy",
229 .desc = "balance-xor, 802.3ad, and tlb hashing method",
230 .values = bond_xmit_hashtype_tbl,
231 .set = bond_option_xmit_hash_policy_set
232 },
233 [BOND_OPT_ARP_VALIDATE] = {
234 .id = BOND_OPT_ARP_VALIDATE,
235 .name = "arp_validate",
236 .desc = "validate src/dst of ARP probes",
237 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
238 BIT(BOND_MODE_ALB),
239 .values = bond_arp_validate_tbl,
240 .set = bond_option_arp_validate_set
241 },
242 [BOND_OPT_ARP_ALL_TARGETS] = {
243 .id = BOND_OPT_ARP_ALL_TARGETS,
244 .name = "arp_all_targets",
245 .desc = "fail on any/all arp targets timeout",
246 .values = bond_arp_all_targets_tbl,
247 .set = bond_option_arp_all_targets_set
248 },
249 [BOND_OPT_FAIL_OVER_MAC] = {
250 .id = BOND_OPT_FAIL_OVER_MAC,
251 .name = "fail_over_mac",
252 .desc = "For active-backup, do not set all slaves to the same MAC",
253 .flags = BOND_OPTFLAG_NOSLAVES,
254 .values = bond_fail_over_mac_tbl,
255 .set = bond_option_fail_over_mac_set
256 },
257 [BOND_OPT_ARP_INTERVAL] = {
258 .id = BOND_OPT_ARP_INTERVAL,
259 .name = "arp_interval",
260 .desc = "arp interval in milliseconds",
261 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
262 BIT(BOND_MODE_ALB),
263 .values = bond_intmax_tbl,
264 .set = bond_option_arp_interval_set
265 },
266 [BOND_OPT_ARP_TARGETS] = {
267 .id = BOND_OPT_ARP_TARGETS,
268 .name = "arp_ip_target",
269 .desc = "arp targets in n.n.n.n form",
270 .flags = BOND_OPTFLAG_RAWVAL,
271 .set = bond_option_arp_ip_targets_set
272 },
273 [BOND_OPT_DOWNDELAY] = {
274 .id = BOND_OPT_DOWNDELAY,
275 .name = "downdelay",
276 .desc = "Delay before considering link down, in milliseconds",
277 .values = bond_intmax_tbl,
278 .set = bond_option_downdelay_set
279 },
280 [BOND_OPT_UPDELAY] = {
281 .id = BOND_OPT_UPDELAY,
282 .name = "updelay",
283 .desc = "Delay before considering link up, in milliseconds",
284 .values = bond_intmax_tbl,
285 .set = bond_option_updelay_set
286 },
287 [BOND_OPT_LACP_RATE] = {
288 .id = BOND_OPT_LACP_RATE,
289 .name = "lacp_rate",
290 .desc = "LACPDU tx rate to request from 802.3ad partner",
291 .flags = BOND_OPTFLAG_IFDOWN,
292 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
293 .values = bond_lacp_rate_tbl,
294 .set = bond_option_lacp_rate_set
295 },
296 [BOND_OPT_MINLINKS] = {
297 .id = BOND_OPT_MINLINKS,
298 .name = "min_links",
299 .desc = "Minimum number of available links before turning on carrier",
300 .values = bond_intmax_tbl,
301 .set = bond_option_min_links_set
302 },
303 [BOND_OPT_AD_SELECT] = {
304 .id = BOND_OPT_AD_SELECT,
305 .name = "ad_select",
306 .desc = "803.ad aggregation selection logic",
307 .flags = BOND_OPTFLAG_IFDOWN,
308 .values = bond_ad_select_tbl,
309 .set = bond_option_ad_select_set
310 },
311 [BOND_OPT_NUM_PEER_NOTIF] = {
312 .id = BOND_OPT_NUM_PEER_NOTIF,
313 .name = "num_unsol_na",
314 .desc = "Number of peer notifications to send on failover event",
315 .values = bond_num_peer_notif_tbl,
316 .set = bond_option_num_peer_notif_set
317 },
318 [BOND_OPT_MIIMON] = {
319 .id = BOND_OPT_MIIMON,
320 .name = "miimon",
321 .desc = "Link check interval in milliseconds",
322 .values = bond_intmax_tbl,
323 .set = bond_option_miimon_set
324 },
325 [BOND_OPT_PRIMARY] = {
326 .id = BOND_OPT_PRIMARY,
327 .name = "primary",
328 .desc = "Primary network device to use",
329 .flags = BOND_OPTFLAG_RAWVAL,
330 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
331 BIT(BOND_MODE_TLB) |
332 BIT(BOND_MODE_ALB)),
333 .set = bond_option_primary_set
334 },
335 [BOND_OPT_PRIMARY_RESELECT] = {
336 .id = BOND_OPT_PRIMARY_RESELECT,
337 .name = "primary_reselect",
338 .desc = "Reselect primary slave once it comes up",
339 .values = bond_primary_reselect_tbl,
340 .set = bond_option_primary_reselect_set
341 },
342 [BOND_OPT_USE_CARRIER] = {
343 .id = BOND_OPT_USE_CARRIER,
344 .name = "use_carrier",
345 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
346 .values = bond_use_carrier_tbl,
347 .set = bond_option_use_carrier_set
348 },
349 [BOND_OPT_ACTIVE_SLAVE] = {
350 .id = BOND_OPT_ACTIVE_SLAVE,
351 .name = "active_slave",
352 .desc = "Currently active slave",
353 .flags = BOND_OPTFLAG_RAWVAL,
354 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
355 BIT(BOND_MODE_TLB) |
356 BIT(BOND_MODE_ALB)),
357 .set = bond_option_active_slave_set
358 },
359 [BOND_OPT_QUEUE_ID] = {
360 .id = BOND_OPT_QUEUE_ID,
361 .name = "queue_id",
362 .desc = "Set queue id of a slave",
363 .flags = BOND_OPTFLAG_RAWVAL,
364 .set = bond_option_queue_id_set
365 },
366 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
367 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
368 .name = "all_slaves_active",
369 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
370 .values = bond_all_slaves_active_tbl,
371 .set = bond_option_all_slaves_active_set
372 },
373 [BOND_OPT_RESEND_IGMP] = {
374 .id = BOND_OPT_RESEND_IGMP,
375 .name = "resend_igmp",
376 .desc = "Number of IGMP membership reports to send on link failure",
377 .values = bond_resend_igmp_tbl,
378 .set = bond_option_resend_igmp_set
379 },
380 [BOND_OPT_LP_INTERVAL] = {
381 .id = BOND_OPT_LP_INTERVAL,
382 .name = "lp_interval",
383 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
384 .values = bond_lp_interval_tbl,
385 .set = bond_option_lp_interval_set
386 },
387 [BOND_OPT_SLAVES] = {
388 .id = BOND_OPT_SLAVES,
389 .name = "slaves",
390 .desc = "Slave membership management",
391 .flags = BOND_OPTFLAG_RAWVAL,
392 .set = bond_option_slaves_set
393 },
394 [BOND_OPT_TLB_DYNAMIC_LB] = {
395 .id = BOND_OPT_TLB_DYNAMIC_LB,
396 .name = "tlb_dynamic_lb",
397 .desc = "Enable dynamic flow shuffling",
398 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)),
399 .values = bond_tlb_dynamic_lb_tbl,
400 .flags = BOND_OPTFLAG_IFDOWN,
401 .set = bond_option_tlb_dynamic_lb_set,
402 },
403 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
404 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
405 .name = "ad_actor_sys_prio",
406 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
407 .values = bond_ad_actor_sys_prio_tbl,
408 .set = bond_option_ad_actor_sys_prio_set,
409 },
410 [BOND_OPT_AD_ACTOR_SYSTEM] = {
411 .id = BOND_OPT_AD_ACTOR_SYSTEM,
412 .name = "ad_actor_system",
413 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
414 .flags = BOND_OPTFLAG_RAWVAL,
415 .set = bond_option_ad_actor_system_set,
416 },
417 [BOND_OPT_AD_USER_PORT_KEY] = {
418 .id = BOND_OPT_AD_USER_PORT_KEY,
419 .name = "ad_user_port_key",
420 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
421 .flags = BOND_OPTFLAG_IFDOWN,
422 .values = bond_ad_user_port_key_tbl,
423 .set = bond_option_ad_user_port_key_set,
424 },
425 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
426 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
427 .name = "num_grat_arp",
428 .desc = "Number of peer notifications to send on failover event",
429 .values = bond_num_peer_notif_tbl,
430 .set = bond_option_num_peer_notif_set
431 }
432 };
433
434 /* Searches for an option by name */
435 const struct bond_option *bond_opt_get_by_name(const char *name)
436 {
437 const struct bond_option *opt;
438 int option;
439
440 for (option = 0; option < BOND_OPT_LAST; option++) {
441 opt = bond_opt_get(option);
442 if (opt && !strcmp(opt->name, name))
443 return opt;
444 }
445
446 return NULL;
447 }
448
449 /* Searches for a value in opt's values[] table */
450 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
451 {
452 const struct bond_option *opt;
453 int i;
454
455 opt = bond_opt_get(option);
456 if (WARN_ON(!opt))
457 return NULL;
458 for (i = 0; opt->values && opt->values[i].string; i++)
459 if (opt->values[i].value == val)
460 return &opt->values[i];
461
462 return NULL;
463 }
464
465 /* Searches for a value in opt's values[] table which matches the flagmask */
466 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
467 u32 flagmask)
468 {
469 int i;
470
471 for (i = 0; opt->values && opt->values[i].string; i++)
472 if (opt->values[i].flags & flagmask)
473 return &opt->values[i];
474
475 return NULL;
476 }
477
478 /* If maxval is missing then there's no range to check. In case minval is
479 * missing then it's considered to be 0.
480 */
481 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
482 {
483 const struct bond_opt_value *minval, *maxval;
484
485 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
486 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
487 if (!maxval || (minval && val < minval->value) || val > maxval->value)
488 return false;
489
490 return true;
491 }
492
493 /**
494 * bond_opt_parse - parse option value
495 * @opt: the option to parse against
496 * @val: value to parse
497 *
498 * This function tries to extract the value from @val and check if it's
499 * a possible match for the option and returns NULL if a match isn't found,
500 * or the struct_opt_value that matched. It also strips the new line from
501 * @val->string if it's present.
502 */
503 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
504 struct bond_opt_value *val)
505 {
506 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
507 const struct bond_opt_value *tbl;
508 const struct bond_opt_value *ret = NULL;
509 bool checkval;
510 int i, rv;
511
512 /* No parsing if the option wants a raw val */
513 if (opt->flags & BOND_OPTFLAG_RAWVAL)
514 return val;
515
516 tbl = opt->values;
517 if (!tbl)
518 goto out;
519
520 /* ULLONG_MAX is used to bypass string processing */
521 checkval = val->value != ULLONG_MAX;
522 if (!checkval) {
523 if (!val->string)
524 goto out;
525 p = strchr(val->string, '\n');
526 if (p)
527 *p = '\0';
528 for (p = val->string; *p; p++)
529 if (!(isdigit(*p) || isspace(*p)))
530 break;
531 /* The following code extracts the string to match or the value
532 * and sets checkval appropriately
533 */
534 if (*p) {
535 rv = sscanf(val->string, "%32s", valstr);
536 } else {
537 rv = sscanf(val->string, "%llu", &val->value);
538 checkval = true;
539 }
540 if (!rv)
541 goto out;
542 }
543
544 for (i = 0; tbl[i].string; i++) {
545 /* Check for exact match */
546 if (checkval) {
547 if (val->value == tbl[i].value)
548 ret = &tbl[i];
549 } else {
550 if (!strcmp(valstr, "default") &&
551 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
552 ret = &tbl[i];
553
554 if (!strcmp(valstr, tbl[i].string))
555 ret = &tbl[i];
556 }
557 /* Found an exact match */
558 if (ret)
559 goto out;
560 }
561 /* Possible range match */
562 if (checkval && bond_opt_check_range(opt, val->value))
563 ret = val;
564 out:
565 return ret;
566 }
567
568 /* Check opt's dependencies against bond mode and currently set options */
569 static int bond_opt_check_deps(struct bonding *bond,
570 const struct bond_option *opt)
571 {
572 struct bond_params *params = &bond->params;
573
574 if (test_bit(params->mode, &opt->unsuppmodes))
575 return -EACCES;
576 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
577 return -ENOTEMPTY;
578 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
579 return -EBUSY;
580
581 return 0;
582 }
583
584 static void bond_opt_dep_print(struct bonding *bond,
585 const struct bond_option *opt)
586 {
587 const struct bond_opt_value *modeval;
588 struct bond_params *params;
589
590 params = &bond->params;
591 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
592 if (test_bit(params->mode, &opt->unsuppmodes))
593 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
594 opt->name, modeval->string, modeval->value);
595 }
596
597 static void bond_opt_error_interpret(struct bonding *bond,
598 const struct bond_option *opt,
599 int error, const struct bond_opt_value *val)
600 {
601 const struct bond_opt_value *minval, *maxval;
602 char *p;
603
604 switch (error) {
605 case -EINVAL:
606 if (val) {
607 if (val->string) {
608 /* sometimes RAWVAL opts may have new lines */
609 p = strchr(val->string, '\n');
610 if (p)
611 *p = '\0';
612 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
613 opt->name, val->string);
614 } else {
615 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
616 opt->name, val->value);
617 }
618 }
619 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
620 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
621 if (!maxval)
622 break;
623 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
624 opt->name, minval ? minval->value : 0, maxval->value);
625 break;
626 case -EACCES:
627 bond_opt_dep_print(bond, opt);
628 break;
629 case -ENOTEMPTY:
630 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
631 opt->name);
632 break;
633 case -EBUSY:
634 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
635 opt->name);
636 break;
637 default:
638 break;
639 }
640 }
641
642 /**
643 * __bond_opt_set - set a bonding option
644 * @bond: target bond device
645 * @option: option to set
646 * @val: value to set it to
647 *
648 * This function is used to change the bond's option value, it can be
649 * used for both enabling/changing an option and for disabling it. RTNL lock
650 * must be obtained before calling this function.
651 */
652 int __bond_opt_set(struct bonding *bond,
653 unsigned int option, struct bond_opt_value *val)
654 {
655 const struct bond_opt_value *retval = NULL;
656 const struct bond_option *opt;
657 int ret = -ENOENT;
658
659 ASSERT_RTNL();
660
661 opt = bond_opt_get(option);
662 if (WARN_ON(!val) || WARN_ON(!opt))
663 goto out;
664 ret = bond_opt_check_deps(bond, opt);
665 if (ret)
666 goto out;
667 retval = bond_opt_parse(opt, val);
668 if (!retval) {
669 ret = -EINVAL;
670 goto out;
671 }
672 ret = opt->set(bond, retval);
673 out:
674 if (ret)
675 bond_opt_error_interpret(bond, opt, ret, val);
676
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 /* don't cache arp_validate between modes */
758 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
759 bond->params.mode = newval->value;
760
761 return 0;
762 }
763
764 static int bond_option_active_slave_set(struct bonding *bond,
765 const struct bond_opt_value *newval)
766 {
767 char ifname[IFNAMSIZ] = { 0, };
768 struct net_device *slave_dev;
769 int ret = 0;
770
771 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
772 if (!strlen(ifname) || newval->string[0] == '\n') {
773 slave_dev = NULL;
774 } else {
775 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
776 if (!slave_dev)
777 return -ENODEV;
778 }
779
780 if (slave_dev) {
781 if (!netif_is_bond_slave(slave_dev)) {
782 netdev_err(bond->dev, "Device %s is not bonding slave\n",
783 slave_dev->name);
784 return -EINVAL;
785 }
786
787 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
788 netdev_err(bond->dev, "Device %s is not our slave\n",
789 slave_dev->name);
790 return -EINVAL;
791 }
792 }
793
794 block_netpoll_tx();
795 /* check to see if we are clearing active */
796 if (!slave_dev) {
797 netdev_dbg(bond->dev, "Clearing current active slave\n");
798 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
799 bond_select_active_slave(bond);
800 } else {
801 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
802 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
803
804 BUG_ON(!new_active);
805
806 if (new_active == old_active) {
807 /* do nothing */
808 netdev_dbg(bond->dev, "%s is already the current active slave\n",
809 new_active->dev->name);
810 } else {
811 if (old_active && (new_active->link == BOND_LINK_UP) &&
812 bond_slave_is_up(new_active)) {
813 netdev_dbg(bond->dev, "Setting %s as active slave\n",
814 new_active->dev->name);
815 bond_change_active_slave(bond, new_active);
816 } else {
817 netdev_err(bond->dev, "Could not set %s as active slave; either %s is down or the link is down\n",
818 new_active->dev->name,
819 new_active->dev->name);
820 ret = -EINVAL;
821 }
822 }
823 }
824 unblock_netpoll_tx();
825
826 return ret;
827 }
828
829 /* There are two tricky bits here. First, if MII monitoring is activated, then
830 * we must disable ARP monitoring. Second, if the timer isn't running, we must
831 * start it.
832 */
833 static int bond_option_miimon_set(struct bonding *bond,
834 const struct bond_opt_value *newval)
835 {
836 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
837 newval->value);
838 bond->params.miimon = newval->value;
839 if (bond->params.updelay)
840 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
841 bond->params.updelay * bond->params.miimon);
842 if (bond->params.downdelay)
843 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
844 bond->params.downdelay * bond->params.miimon);
845 if (newval->value && bond->params.arp_interval) {
846 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
847 bond->params.arp_interval = 0;
848 if (bond->params.arp_validate)
849 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
850 }
851 if (bond->dev->flags & IFF_UP) {
852 /* If the interface is up, we may need to fire off
853 * the MII timer. If the interface is down, the
854 * timer will get fired off when the open function
855 * is called.
856 */
857 if (!newval->value) {
858 cancel_delayed_work_sync(&bond->mii_work);
859 } else {
860 cancel_delayed_work_sync(&bond->arp_work);
861 queue_delayed_work(bond->wq, &bond->mii_work, 0);
862 }
863 }
864
865 return 0;
866 }
867
868 /* Set up and down delays. These must be multiples of the
869 * MII monitoring value, and are stored internally as the multiplier.
870 * Thus, we must translate to MS for the real world.
871 */
872 static int bond_option_updelay_set(struct bonding *bond,
873 const struct bond_opt_value *newval)
874 {
875 int value = newval->value;
876
877 if (!bond->params.miimon) {
878 netdev_err(bond->dev, "Unable to set up delay as MII monitoring is disabled\n");
879 return -EPERM;
880 }
881 if ((value % bond->params.miimon) != 0) {
882 netdev_warn(bond->dev, "up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
883 value, bond->params.miimon,
884 (value / bond->params.miimon) *
885 bond->params.miimon);
886 }
887 bond->params.updelay = value / bond->params.miimon;
888 netdev_dbg(bond->dev, "Setting up delay to %d\n",
889 bond->params.updelay * bond->params.miimon);
890
891 return 0;
892 }
893
894 static int bond_option_downdelay_set(struct bonding *bond,
895 const struct bond_opt_value *newval)
896 {
897 int value = newval->value;
898
899 if (!bond->params.miimon) {
900 netdev_err(bond->dev, "Unable to set down delay as MII monitoring is disabled\n");
901 return -EPERM;
902 }
903 if ((value % bond->params.miimon) != 0) {
904 netdev_warn(bond->dev, "down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n",
905 value, bond->params.miimon,
906 (value / bond->params.miimon) *
907 bond->params.miimon);
908 }
909 bond->params.downdelay = value / bond->params.miimon;
910 netdev_dbg(bond->dev, "Setting down delay to %d\n",
911 bond->params.downdelay * bond->params.miimon);
912
913 return 0;
914 }
915
916 static int bond_option_use_carrier_set(struct bonding *bond,
917 const struct bond_opt_value *newval)
918 {
919 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
920 newval->value);
921 bond->params.use_carrier = newval->value;
922
923 return 0;
924 }
925
926 /* There are two tricky bits here. First, if ARP monitoring is activated, then
927 * we must disable MII monitoring. Second, if the ARP timer isn't running,
928 * we must start it.
929 */
930 static int bond_option_arp_interval_set(struct bonding *bond,
931 const struct bond_opt_value *newval)
932 {
933 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
934 newval->value);
935 bond->params.arp_interval = newval->value;
936 if (newval->value) {
937 if (bond->params.miimon) {
938 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
939 bond->params.miimon = 0;
940 }
941 if (!bond->params.arp_targets[0])
942 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
943 }
944 if (bond->dev->flags & IFF_UP) {
945 /* If the interface is up, we may need to fire off
946 * the ARP timer. If the interface is down, the
947 * timer will get fired off when the open function
948 * is called.
949 */
950 if (!newval->value) {
951 if (bond->params.arp_validate)
952 bond->recv_probe = NULL;
953 cancel_delayed_work_sync(&bond->arp_work);
954 } else {
955 /* arp_validate can be set only in active-backup mode */
956 bond->recv_probe = bond_arp_rcv;
957 cancel_delayed_work_sync(&bond->mii_work);
958 queue_delayed_work(bond->wq, &bond->arp_work, 0);
959 }
960 }
961
962 return 0;
963 }
964
965 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
966 __be32 target,
967 unsigned long last_rx)
968 {
969 __be32 *targets = bond->params.arp_targets;
970 struct list_head *iter;
971 struct slave *slave;
972
973 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
974 bond_for_each_slave(bond, slave, iter)
975 slave->target_last_arp_rx[slot] = last_rx;
976 targets[slot] = target;
977 }
978 }
979
980 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
981 {
982 __be32 *targets = bond->params.arp_targets;
983 int ind;
984
985 if (!bond_is_ip_target_ok(target)) {
986 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
987 &target);
988 return -EINVAL;
989 }
990
991 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
992 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
993 &target);
994 return -EINVAL;
995 }
996
997 ind = bond_get_targets_ip(targets, 0); /* first free slot */
998 if (ind == -1) {
999 netdev_err(bond->dev, "ARP target table is full!\n");
1000 return -EINVAL;
1001 }
1002
1003 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1004
1005 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1006
1007 return 0;
1008 }
1009
1010 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1011 {
1012 return _bond_option_arp_ip_target_add(bond, target);
1013 }
1014
1015 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1016 {
1017 __be32 *targets = bond->params.arp_targets;
1018 struct list_head *iter;
1019 struct slave *slave;
1020 unsigned long *targets_rx;
1021 int ind, i;
1022
1023 if (!bond_is_ip_target_ok(target)) {
1024 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1025 &target);
1026 return -EINVAL;
1027 }
1028
1029 ind = bond_get_targets_ip(targets, target);
1030 if (ind == -1) {
1031 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1032 &target);
1033 return -EINVAL;
1034 }
1035
1036 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1037 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1038
1039 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1040
1041 bond_for_each_slave(bond, slave, iter) {
1042 targets_rx = slave->target_last_arp_rx;
1043 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1044 targets_rx[i] = targets_rx[i+1];
1045 targets_rx[i] = 0;
1046 }
1047 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1048 targets[i] = targets[i+1];
1049 targets[i] = 0;
1050
1051 return 0;
1052 }
1053
1054 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1055 {
1056 int i;
1057
1058 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1059 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1060 }
1061
1062 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1063 const struct bond_opt_value *newval)
1064 {
1065 int ret = -EPERM;
1066 __be32 target;
1067
1068 if (newval->string) {
1069 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1070 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1071 &target);
1072 return ret;
1073 }
1074 if (newval->string[0] == '+')
1075 ret = bond_option_arp_ip_target_add(bond, target);
1076 else if (newval->string[0] == '-')
1077 ret = bond_option_arp_ip_target_rem(bond, target);
1078 else
1079 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1080 } else {
1081 target = newval->value;
1082 ret = bond_option_arp_ip_target_add(bond, target);
1083 }
1084
1085 return ret;
1086 }
1087
1088 static int bond_option_arp_validate_set(struct bonding *bond,
1089 const struct bond_opt_value *newval)
1090 {
1091 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1092 newval->string, newval->value);
1093
1094 if (bond->dev->flags & IFF_UP) {
1095 if (!newval->value)
1096 bond->recv_probe = NULL;
1097 else if (bond->params.arp_interval)
1098 bond->recv_probe = bond_arp_rcv;
1099 }
1100 bond->params.arp_validate = newval->value;
1101
1102 return 0;
1103 }
1104
1105 static int bond_option_arp_all_targets_set(struct bonding *bond,
1106 const struct bond_opt_value *newval)
1107 {
1108 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1109 newval->string, newval->value);
1110 bond->params.arp_all_targets = newval->value;
1111
1112 return 0;
1113 }
1114
1115 static int bond_option_primary_set(struct bonding *bond,
1116 const struct bond_opt_value *newval)
1117 {
1118 char *p, *primary = newval->string;
1119 struct list_head *iter;
1120 struct slave *slave;
1121
1122 block_netpoll_tx();
1123
1124 p = strchr(primary, '\n');
1125 if (p)
1126 *p = '\0';
1127 /* check to see if we are clearing primary */
1128 if (!strlen(primary)) {
1129 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1130 RCU_INIT_POINTER(bond->primary_slave, NULL);
1131 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1132 bond_select_active_slave(bond);
1133 goto out;
1134 }
1135
1136 bond_for_each_slave(bond, slave, iter) {
1137 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1138 netdev_dbg(bond->dev, "Setting %s as primary slave\n",
1139 slave->dev->name);
1140 rcu_assign_pointer(bond->primary_slave, slave);
1141 strcpy(bond->params.primary, slave->dev->name);
1142 bond_select_active_slave(bond);
1143 goto out;
1144 }
1145 }
1146
1147 if (rtnl_dereference(bond->primary_slave)) {
1148 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1149 RCU_INIT_POINTER(bond->primary_slave, NULL);
1150 bond_select_active_slave(bond);
1151 }
1152 strncpy(bond->params.primary, primary, IFNAMSIZ);
1153 bond->params.primary[IFNAMSIZ - 1] = 0;
1154
1155 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved to %s yet\n",
1156 primary, bond->dev->name);
1157
1158 out:
1159 unblock_netpoll_tx();
1160
1161 return 0;
1162 }
1163
1164 static int bond_option_primary_reselect_set(struct bonding *bond,
1165 const struct bond_opt_value *newval)
1166 {
1167 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1168 newval->string, newval->value);
1169 bond->params.primary_reselect = newval->value;
1170
1171 block_netpoll_tx();
1172 bond_select_active_slave(bond);
1173 unblock_netpoll_tx();
1174
1175 return 0;
1176 }
1177
1178 static int bond_option_fail_over_mac_set(struct bonding *bond,
1179 const struct bond_opt_value *newval)
1180 {
1181 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1182 newval->string, newval->value);
1183 bond->params.fail_over_mac = newval->value;
1184
1185 return 0;
1186 }
1187
1188 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1189 const struct bond_opt_value *newval)
1190 {
1191 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1192 newval->string, newval->value);
1193 bond->params.xmit_policy = newval->value;
1194
1195 return 0;
1196 }
1197
1198 static int bond_option_resend_igmp_set(struct bonding *bond,
1199 const struct bond_opt_value *newval)
1200 {
1201 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1202 newval->value);
1203 bond->params.resend_igmp = newval->value;
1204
1205 return 0;
1206 }
1207
1208 static int bond_option_num_peer_notif_set(struct bonding *bond,
1209 const struct bond_opt_value *newval)
1210 {
1211 bond->params.num_peer_notif = newval->value;
1212
1213 return 0;
1214 }
1215
1216 static int bond_option_all_slaves_active_set(struct bonding *bond,
1217 const struct bond_opt_value *newval)
1218 {
1219 struct list_head *iter;
1220 struct slave *slave;
1221
1222 if (newval->value == bond->params.all_slaves_active)
1223 return 0;
1224 bond->params.all_slaves_active = newval->value;
1225 bond_for_each_slave(bond, slave, iter) {
1226 if (!bond_is_active_slave(slave)) {
1227 if (newval->value)
1228 slave->inactive = 0;
1229 else
1230 slave->inactive = 1;
1231 }
1232 }
1233
1234 return 0;
1235 }
1236
1237 static int bond_option_min_links_set(struct bonding *bond,
1238 const struct bond_opt_value *newval)
1239 {
1240 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1241 newval->value);
1242 bond->params.min_links = newval->value;
1243 bond_set_carrier(bond);
1244
1245 return 0;
1246 }
1247
1248 static int bond_option_lp_interval_set(struct bonding *bond,
1249 const struct bond_opt_value *newval)
1250 {
1251 bond->params.lp_interval = newval->value;
1252
1253 return 0;
1254 }
1255
1256 static int bond_option_pps_set(struct bonding *bond,
1257 const struct bond_opt_value *newval)
1258 {
1259 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1260 newval->value);
1261 bond->params.packets_per_slave = newval->value;
1262 if (newval->value > 0) {
1263 bond->params.reciprocal_packets_per_slave =
1264 reciprocal_value(newval->value);
1265 } else {
1266 /* reciprocal_packets_per_slave is unused if
1267 * packets_per_slave is 0 or 1, just initialize it
1268 */
1269 bond->params.reciprocal_packets_per_slave =
1270 (struct reciprocal_value) { 0 };
1271 }
1272
1273 return 0;
1274 }
1275
1276 static int bond_option_lacp_rate_set(struct bonding *bond,
1277 const struct bond_opt_value *newval)
1278 {
1279 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1280 newval->string, newval->value);
1281 bond->params.lacp_fast = newval->value;
1282 bond_3ad_update_lacp_rate(bond);
1283
1284 return 0;
1285 }
1286
1287 static int bond_option_ad_select_set(struct bonding *bond,
1288 const struct bond_opt_value *newval)
1289 {
1290 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1291 newval->string, newval->value);
1292 bond->params.ad_select = newval->value;
1293
1294 return 0;
1295 }
1296
1297 static int bond_option_queue_id_set(struct bonding *bond,
1298 const struct bond_opt_value *newval)
1299 {
1300 struct slave *slave, *update_slave;
1301 struct net_device *sdev;
1302 struct list_head *iter;
1303 char *delim;
1304 int ret = 0;
1305 u16 qid;
1306
1307 /* delim will point to queue id if successful */
1308 delim = strchr(newval->string, ':');
1309 if (!delim)
1310 goto err_no_cmd;
1311
1312 /* Terminate string that points to device name and bump it
1313 * up one, so we can read the queue id there.
1314 */
1315 *delim = '\0';
1316 if (sscanf(++delim, "%hd\n", &qid) != 1)
1317 goto err_no_cmd;
1318
1319 /* Check buffer length, valid ifname and queue id */
1320 if (!dev_valid_name(newval->string) ||
1321 qid > bond->dev->real_num_tx_queues)
1322 goto err_no_cmd;
1323
1324 /* Get the pointer to that interface if it exists */
1325 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1326 if (!sdev)
1327 goto err_no_cmd;
1328
1329 /* Search for thes slave and check for duplicate qids */
1330 update_slave = NULL;
1331 bond_for_each_slave(bond, slave, iter) {
1332 if (sdev == slave->dev)
1333 /* We don't need to check the matching
1334 * slave for dups, since we're overwriting it
1335 */
1336 update_slave = slave;
1337 else if (qid && qid == slave->queue_id) {
1338 goto err_no_cmd;
1339 }
1340 }
1341
1342 if (!update_slave)
1343 goto err_no_cmd;
1344
1345 /* Actually set the qids for the slave */
1346 update_slave->queue_id = qid;
1347
1348 out:
1349 return ret;
1350
1351 err_no_cmd:
1352 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1353 ret = -EPERM;
1354 goto out;
1355
1356 }
1357
1358 static int bond_option_slaves_set(struct bonding *bond,
1359 const struct bond_opt_value *newval)
1360 {
1361 char command[IFNAMSIZ + 1] = { 0, };
1362 struct net_device *dev;
1363 char *ifname;
1364 int ret;
1365
1366 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1367 ifname = command + 1;
1368 if ((strlen(command) <= 1) ||
1369 !dev_valid_name(ifname))
1370 goto err_no_cmd;
1371
1372 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1373 if (!dev) {
1374 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1375 ifname);
1376 ret = -ENODEV;
1377 goto out;
1378 }
1379
1380 switch (command[0]) {
1381 case '+':
1382 netdev_dbg(bond->dev, "Adding slave %s\n", dev->name);
1383 ret = bond_enslave(bond->dev, dev);
1384 break;
1385
1386 case '-':
1387 netdev_dbg(bond->dev, "Removing slave %s\n", dev->name);
1388 ret = bond_release(bond->dev, dev);
1389 break;
1390
1391 default:
1392 goto err_no_cmd;
1393 }
1394
1395 out:
1396 return ret;
1397
1398 err_no_cmd:
1399 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1400 ret = -EPERM;
1401 goto out;
1402 }
1403
1404 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1405 const struct bond_opt_value *newval)
1406 {
1407 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1408 newval->string, newval->value);
1409 bond->params.tlb_dynamic_lb = newval->value;
1410
1411 return 0;
1412 }
1413
1414 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1415 const struct bond_opt_value *newval)
1416 {
1417 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1418 newval->value);
1419
1420 bond->params.ad_actor_sys_prio = newval->value;
1421 bond_3ad_update_ad_actor_settings(bond);
1422
1423 return 0;
1424 }
1425
1426 static int bond_option_ad_actor_system_set(struct bonding *bond,
1427 const struct bond_opt_value *newval)
1428 {
1429 u8 macaddr[ETH_ALEN];
1430 u8 *mac;
1431 int i;
1432
1433 if (newval->string) {
1434 i = sscanf(newval->string, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx",
1435 &macaddr[0], &macaddr[1], &macaddr[2],
1436 &macaddr[3], &macaddr[4], &macaddr[5]);
1437 if (i != ETH_ALEN)
1438 goto err;
1439 mac = macaddr;
1440 } else {
1441 mac = (u8 *)&newval->value;
1442 }
1443
1444 if (!is_valid_ether_addr(mac))
1445 goto err;
1446
1447 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1448 ether_addr_copy(bond->params.ad_actor_system, mac);
1449 bond_3ad_update_ad_actor_settings(bond);
1450
1451 return 0;
1452
1453 err:
1454 netdev_err(bond->dev, "Invalid MAC address.\n");
1455 return -EINVAL;
1456 }
1457
1458 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1459 const struct bond_opt_value *newval)
1460 {
1461 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1462 newval->value);
1463
1464 bond->params.ad_user_port_key = newval->value;
1465 return 0;
1466 }
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