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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/bond/bond_options.c - bonding options
4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
6 */
7
8#include <linux/errno.h>
9#include <linux/if.h>
10#include <linux/netdevice.h>
11#include <linux/spinlock.h>
12#include <linux/rcupdate.h>
13#include <linux/ctype.h>
14#include <linux/inet.h>
15#include <linux/sched/signal.h>
16
17#include <net/bonding.h>
18
19static int bond_option_active_slave_set(struct bonding *bond,
20 const struct bond_opt_value *newval);
21static int bond_option_miimon_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23static int bond_option_updelay_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25static int bond_option_downdelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27static int bond_option_peer_notif_delay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29static int bond_option_use_carrier_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31static int bond_option_arp_interval_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
34static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
35static int bond_option_arp_ip_targets_set(struct bonding *bond,
36 const struct bond_opt_value *newval);
37static int bond_option_arp_validate_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39static int bond_option_arp_all_targets_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41static int bond_option_primary_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43static int bond_option_primary_reselect_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45static int bond_option_fail_over_mac_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47static int bond_option_xmit_hash_policy_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49static int bond_option_resend_igmp_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51static int bond_option_num_peer_notif_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53static int bond_option_all_slaves_active_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55static int bond_option_min_links_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57static int bond_option_lp_interval_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59static int bond_option_pps_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61static int bond_option_lacp_rate_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63static int bond_option_ad_select_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65static int bond_option_queue_id_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67static int bond_option_mode_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69static int bond_option_slaves_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75static int bond_option_ad_actor_system_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77static int bond_option_ad_user_port_key_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79
80
81static const struct bond_opt_value bond_mode_tbl[] = {
82 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
83 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
84 { "balance-xor", BOND_MODE_XOR, 0},
85 { "broadcast", BOND_MODE_BROADCAST, 0},
86 { "802.3ad", BOND_MODE_8023AD, 0},
87 { "balance-tlb", BOND_MODE_TLB, 0},
88 { "balance-alb", BOND_MODE_ALB, 0},
89 { NULL, -1, 0},
90};
91
92static const struct bond_opt_value bond_pps_tbl[] = {
93 { "default", 1, BOND_VALFLAG_DEFAULT},
94 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
95 { NULL, -1, 0},
96};
97
98static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
99 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
100 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
101 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
102 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
103 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
104 { NULL, -1, 0},
105};
106
107static const struct bond_opt_value bond_arp_validate_tbl[] = {
108 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
109 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
110 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
111 { "all", BOND_ARP_VALIDATE_ALL, 0},
112 { "filter", BOND_ARP_FILTER, 0},
113 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
114 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
115 { NULL, -1, 0},
116};
117
118static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
119 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
120 { "all", BOND_ARP_TARGETS_ALL, 0},
121 { NULL, -1, 0},
122};
123
124static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
125 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
126 { "active", BOND_FOM_ACTIVE, 0},
127 { "follow", BOND_FOM_FOLLOW, 0},
128 { NULL, -1, 0},
129};
130
131static const struct bond_opt_value bond_intmax_tbl[] = {
132 { "off", 0, BOND_VALFLAG_DEFAULT},
133 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
134 { NULL, -1, 0}
135};
136
137static const struct bond_opt_value bond_lacp_rate_tbl[] = {
138 { "slow", AD_LACP_SLOW, 0},
139 { "fast", AD_LACP_FAST, 0},
140 { NULL, -1, 0},
141};
142
143static const struct bond_opt_value bond_ad_select_tbl[] = {
144 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
145 { "bandwidth", BOND_AD_BANDWIDTH, 0},
146 { "count", BOND_AD_COUNT, 0},
147 { NULL, -1, 0},
148};
149
150static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
151 { "off", 0, 0},
152 { "maxval", 255, BOND_VALFLAG_MAX},
153 { "default", 1, BOND_VALFLAG_DEFAULT},
154 { NULL, -1, 0}
155};
156
157static const struct bond_opt_value bond_primary_reselect_tbl[] = {
158 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
159 { "better", BOND_PRI_RESELECT_BETTER, 0},
160 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
161 { NULL, -1},
162};
163
164static const struct bond_opt_value bond_use_carrier_tbl[] = {
165 { "off", 0, 0},
166 { "on", 1, BOND_VALFLAG_DEFAULT},
167 { NULL, -1, 0}
168};
169
170static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
171 { "off", 0, BOND_VALFLAG_DEFAULT},
172 { "on", 1, 0},
173 { NULL, -1, 0}
174};
175
176static const struct bond_opt_value bond_resend_igmp_tbl[] = {
177 { "off", 0, 0},
178 { "maxval", 255, BOND_VALFLAG_MAX},
179 { "default", 1, BOND_VALFLAG_DEFAULT},
180 { NULL, -1, 0}
181};
182
183static const struct bond_opt_value bond_lp_interval_tbl[] = {
184 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
185 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
186 { NULL, -1, 0},
187};
188
189static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
190 { "off", 0, 0},
191 { "on", 1, BOND_VALFLAG_DEFAULT},
192 { NULL, -1, 0}
193};
194
195static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
196 { "minval", 1, BOND_VALFLAG_MIN},
197 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
198 { NULL, -1, 0},
199};
200
201static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
202 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
203 { "maxval", 1023, BOND_VALFLAG_MAX},
204 { NULL, -1, 0},
205};
206
207static const struct bond_option bond_opts[BOND_OPT_LAST] = {
208 [BOND_OPT_MODE] = {
209 .id = BOND_OPT_MODE,
210 .name = "mode",
211 .desc = "bond device mode",
212 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
213 .values = bond_mode_tbl,
214 .set = bond_option_mode_set
215 },
216 [BOND_OPT_PACKETS_PER_SLAVE] = {
217 .id = BOND_OPT_PACKETS_PER_SLAVE,
218 .name = "packets_per_slave",
219 .desc = "Packets to send per slave in RR mode",
220 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
221 .values = bond_pps_tbl,
222 .set = bond_option_pps_set
223 },
224 [BOND_OPT_XMIT_HASH] = {
225 .id = BOND_OPT_XMIT_HASH,
226 .name = "xmit_hash_policy",
227 .desc = "balance-xor, 802.3ad, and tlb hashing method",
228 .values = bond_xmit_hashtype_tbl,
229 .set = bond_option_xmit_hash_policy_set
230 },
231 [BOND_OPT_ARP_VALIDATE] = {
232 .id = BOND_OPT_ARP_VALIDATE,
233 .name = "arp_validate",
234 .desc = "validate src/dst of ARP probes",
235 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
236 BIT(BOND_MODE_ALB),
237 .values = bond_arp_validate_tbl,
238 .set = bond_option_arp_validate_set
239 },
240 [BOND_OPT_ARP_ALL_TARGETS] = {
241 .id = BOND_OPT_ARP_ALL_TARGETS,
242 .name = "arp_all_targets",
243 .desc = "fail on any/all arp targets timeout",
244 .values = bond_arp_all_targets_tbl,
245 .set = bond_option_arp_all_targets_set
246 },
247 [BOND_OPT_FAIL_OVER_MAC] = {
248 .id = BOND_OPT_FAIL_OVER_MAC,
249 .name = "fail_over_mac",
250 .desc = "For active-backup, do not set all slaves to the same MAC",
251 .flags = BOND_OPTFLAG_NOSLAVES,
252 .values = bond_fail_over_mac_tbl,
253 .set = bond_option_fail_over_mac_set
254 },
255 [BOND_OPT_ARP_INTERVAL] = {
256 .id = BOND_OPT_ARP_INTERVAL,
257 .name = "arp_interval",
258 .desc = "arp interval in milliseconds",
259 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
260 BIT(BOND_MODE_ALB),
261 .values = bond_intmax_tbl,
262 .set = bond_option_arp_interval_set
263 },
264 [BOND_OPT_ARP_TARGETS] = {
265 .id = BOND_OPT_ARP_TARGETS,
266 .name = "arp_ip_target",
267 .desc = "arp targets in n.n.n.n form",
268 .flags = BOND_OPTFLAG_RAWVAL,
269 .set = bond_option_arp_ip_targets_set
270 },
271 [BOND_OPT_DOWNDELAY] = {
272 .id = BOND_OPT_DOWNDELAY,
273 .name = "downdelay",
274 .desc = "Delay before considering link down, in milliseconds",
275 .values = bond_intmax_tbl,
276 .set = bond_option_downdelay_set
277 },
278 [BOND_OPT_UPDELAY] = {
279 .id = BOND_OPT_UPDELAY,
280 .name = "updelay",
281 .desc = "Delay before considering link up, in milliseconds",
282 .values = bond_intmax_tbl,
283 .set = bond_option_updelay_set
284 },
285 [BOND_OPT_LACP_RATE] = {
286 .id = BOND_OPT_LACP_RATE,
287 .name = "lacp_rate",
288 .desc = "LACPDU tx rate to request from 802.3ad partner",
289 .flags = BOND_OPTFLAG_IFDOWN,
290 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
291 .values = bond_lacp_rate_tbl,
292 .set = bond_option_lacp_rate_set
293 },
294 [BOND_OPT_MINLINKS] = {
295 .id = BOND_OPT_MINLINKS,
296 .name = "min_links",
297 .desc = "Minimum number of available links before turning on carrier",
298 .values = bond_intmax_tbl,
299 .set = bond_option_min_links_set
300 },
301 [BOND_OPT_AD_SELECT] = {
302 .id = BOND_OPT_AD_SELECT,
303 .name = "ad_select",
304 .desc = "803.ad aggregation selection logic",
305 .flags = BOND_OPTFLAG_IFDOWN,
306 .values = bond_ad_select_tbl,
307 .set = bond_option_ad_select_set
308 },
309 [BOND_OPT_NUM_PEER_NOTIF] = {
310 .id = BOND_OPT_NUM_PEER_NOTIF,
311 .name = "num_unsol_na",
312 .desc = "Number of peer notifications to send on failover event",
313 .values = bond_num_peer_notif_tbl,
314 .set = bond_option_num_peer_notif_set
315 },
316 [BOND_OPT_MIIMON] = {
317 .id = BOND_OPT_MIIMON,
318 .name = "miimon",
319 .desc = "Link check interval in milliseconds",
320 .values = bond_intmax_tbl,
321 .set = bond_option_miimon_set
322 },
323 [BOND_OPT_PRIMARY] = {
324 .id = BOND_OPT_PRIMARY,
325 .name = "primary",
326 .desc = "Primary network device to use",
327 .flags = BOND_OPTFLAG_RAWVAL,
328 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
329 BIT(BOND_MODE_TLB) |
330 BIT(BOND_MODE_ALB)),
331 .set = bond_option_primary_set
332 },
333 [BOND_OPT_PRIMARY_RESELECT] = {
334 .id = BOND_OPT_PRIMARY_RESELECT,
335 .name = "primary_reselect",
336 .desc = "Reselect primary slave once it comes up",
337 .values = bond_primary_reselect_tbl,
338 .set = bond_option_primary_reselect_set
339 },
340 [BOND_OPT_USE_CARRIER] = {
341 .id = BOND_OPT_USE_CARRIER,
342 .name = "use_carrier",
343 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
344 .values = bond_use_carrier_tbl,
345 .set = bond_option_use_carrier_set
346 },
347 [BOND_OPT_ACTIVE_SLAVE] = {
348 .id = BOND_OPT_ACTIVE_SLAVE,
349 .name = "active_slave",
350 .desc = "Currently active slave",
351 .flags = BOND_OPTFLAG_RAWVAL,
352 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
353 BIT(BOND_MODE_TLB) |
354 BIT(BOND_MODE_ALB)),
355 .set = bond_option_active_slave_set
356 },
357 [BOND_OPT_QUEUE_ID] = {
358 .id = BOND_OPT_QUEUE_ID,
359 .name = "queue_id",
360 .desc = "Set queue id of a slave",
361 .flags = BOND_OPTFLAG_RAWVAL,
362 .set = bond_option_queue_id_set
363 },
364 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
365 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
366 .name = "all_slaves_active",
367 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
368 .values = bond_all_slaves_active_tbl,
369 .set = bond_option_all_slaves_active_set
370 },
371 [BOND_OPT_RESEND_IGMP] = {
372 .id = BOND_OPT_RESEND_IGMP,
373 .name = "resend_igmp",
374 .desc = "Number of IGMP membership reports to send on link failure",
375 .values = bond_resend_igmp_tbl,
376 .set = bond_option_resend_igmp_set
377 },
378 [BOND_OPT_LP_INTERVAL] = {
379 .id = BOND_OPT_LP_INTERVAL,
380 .name = "lp_interval",
381 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
382 .values = bond_lp_interval_tbl,
383 .set = bond_option_lp_interval_set
384 },
385 [BOND_OPT_SLAVES] = {
386 .id = BOND_OPT_SLAVES,
387 .name = "slaves",
388 .desc = "Slave membership management",
389 .flags = BOND_OPTFLAG_RAWVAL,
390 .set = bond_option_slaves_set
391 },
392 [BOND_OPT_TLB_DYNAMIC_LB] = {
393 .id = BOND_OPT_TLB_DYNAMIC_LB,
394 .name = "tlb_dynamic_lb",
395 .desc = "Enable dynamic flow shuffling",
396 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
397 .values = bond_tlb_dynamic_lb_tbl,
398 .flags = BOND_OPTFLAG_IFDOWN,
399 .set = bond_option_tlb_dynamic_lb_set,
400 },
401 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
402 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
403 .name = "ad_actor_sys_prio",
404 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
405 .values = bond_ad_actor_sys_prio_tbl,
406 .set = bond_option_ad_actor_sys_prio_set,
407 },
408 [BOND_OPT_AD_ACTOR_SYSTEM] = {
409 .id = BOND_OPT_AD_ACTOR_SYSTEM,
410 .name = "ad_actor_system",
411 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
412 .flags = BOND_OPTFLAG_RAWVAL,
413 .set = bond_option_ad_actor_system_set,
414 },
415 [BOND_OPT_AD_USER_PORT_KEY] = {
416 .id = BOND_OPT_AD_USER_PORT_KEY,
417 .name = "ad_user_port_key",
418 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
419 .flags = BOND_OPTFLAG_IFDOWN,
420 .values = bond_ad_user_port_key_tbl,
421 .set = bond_option_ad_user_port_key_set,
422 },
423 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
424 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
425 .name = "num_grat_arp",
426 .desc = "Number of peer notifications to send on failover event",
427 .values = bond_num_peer_notif_tbl,
428 .set = bond_option_num_peer_notif_set
429 },
430 [BOND_OPT_PEER_NOTIF_DELAY] = {
431 .id = BOND_OPT_PEER_NOTIF_DELAY,
432 .name = "peer_notif_delay",
433 .desc = "Delay between each peer notification on failover event, in milliseconds",
434 .values = bond_intmax_tbl,
435 .set = bond_option_peer_notif_delay_set
436 }
437};
438
439/* Searches for an option by name */
440const struct bond_option *bond_opt_get_by_name(const char *name)
441{
442 const struct bond_option *opt;
443 int option;
444
445 for (option = 0; option < BOND_OPT_LAST; option++) {
446 opt = bond_opt_get(option);
447 if (opt && !strcmp(opt->name, name))
448 return opt;
449 }
450
451 return NULL;
452}
453
454/* Searches for a value in opt's values[] table */
455const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
456{
457 const struct bond_option *opt;
458 int i;
459
460 opt = bond_opt_get(option);
461 if (WARN_ON(!opt))
462 return NULL;
463 for (i = 0; opt->values && opt->values[i].string; i++)
464 if (opt->values[i].value == val)
465 return &opt->values[i];
466
467 return NULL;
468}
469
470/* Searches for a value in opt's values[] table which matches the flagmask */
471static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
472 u32 flagmask)
473{
474 int i;
475
476 for (i = 0; opt->values && opt->values[i].string; i++)
477 if (opt->values[i].flags & flagmask)
478 return &opt->values[i];
479
480 return NULL;
481}
482
483/* If maxval is missing then there's no range to check. In case minval is
484 * missing then it's considered to be 0.
485 */
486static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
487{
488 const struct bond_opt_value *minval, *maxval;
489
490 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
491 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
492 if (!maxval || (minval && val < minval->value) || val > maxval->value)
493 return false;
494
495 return true;
496}
497
498/**
499 * bond_opt_parse - parse option value
500 * @opt: the option to parse against
501 * @val: value to parse
502 *
503 * This function tries to extract the value from @val and check if it's
504 * a possible match for the option and returns NULL if a match isn't found,
505 * or the struct_opt_value that matched. It also strips the new line from
506 * @val->string if it's present.
507 */
508const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
509 struct bond_opt_value *val)
510{
511 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
512 const struct bond_opt_value *tbl;
513 const struct bond_opt_value *ret = NULL;
514 bool checkval;
515 int i, rv;
516
517 /* No parsing if the option wants a raw val */
518 if (opt->flags & BOND_OPTFLAG_RAWVAL)
519 return val;
520
521 tbl = opt->values;
522 if (!tbl)
523 goto out;
524
525 /* ULLONG_MAX is used to bypass string processing */
526 checkval = val->value != ULLONG_MAX;
527 if (!checkval) {
528 if (!val->string)
529 goto out;
530 p = strchr(val->string, '\n');
531 if (p)
532 *p = '\0';
533 for (p = val->string; *p; p++)
534 if (!(isdigit(*p) || isspace(*p)))
535 break;
536 /* The following code extracts the string to match or the value
537 * and sets checkval appropriately
538 */
539 if (*p) {
540 rv = sscanf(val->string, "%32s", valstr);
541 } else {
542 rv = sscanf(val->string, "%llu", &val->value);
543 checkval = true;
544 }
545 if (!rv)
546 goto out;
547 }
548
549 for (i = 0; tbl[i].string; i++) {
550 /* Check for exact match */
551 if (checkval) {
552 if (val->value == tbl[i].value)
553 ret = &tbl[i];
554 } else {
555 if (!strcmp(valstr, "default") &&
556 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
557 ret = &tbl[i];
558
559 if (!strcmp(valstr, tbl[i].string))
560 ret = &tbl[i];
561 }
562 /* Found an exact match */
563 if (ret)
564 goto out;
565 }
566 /* Possible range match */
567 if (checkval && bond_opt_check_range(opt, val->value))
568 ret = val;
569out:
570 return ret;
571}
572
573/* Check opt's dependencies against bond mode and currently set options */
574static int bond_opt_check_deps(struct bonding *bond,
575 const struct bond_option *opt)
576{
577 struct bond_params *params = &bond->params;
578
579 if (test_bit(params->mode, &opt->unsuppmodes))
580 return -EACCES;
581 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
582 return -ENOTEMPTY;
583 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
584 return -EBUSY;
585
586 return 0;
587}
588
589static void bond_opt_dep_print(struct bonding *bond,
590 const struct bond_option *opt)
591{
592 const struct bond_opt_value *modeval;
593 struct bond_params *params;
594
595 params = &bond->params;
596 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
597 if (test_bit(params->mode, &opt->unsuppmodes))
598 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
599 opt->name, modeval->string, modeval->value);
600}
601
602static void bond_opt_error_interpret(struct bonding *bond,
603 const struct bond_option *opt,
604 int error, const struct bond_opt_value *val)
605{
606 const struct bond_opt_value *minval, *maxval;
607 char *p;
608
609 switch (error) {
610 case -EINVAL:
611 if (val) {
612 if (val->string) {
613 /* sometimes RAWVAL opts may have new lines */
614 p = strchr(val->string, '\n');
615 if (p)
616 *p = '\0';
617 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
618 opt->name, val->string);
619 } else {
620 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
621 opt->name, val->value);
622 }
623 }
624 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
625 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
626 if (!maxval)
627 break;
628 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
629 opt->name, minval ? minval->value : 0, maxval->value);
630 break;
631 case -EACCES:
632 bond_opt_dep_print(bond, opt);
633 break;
634 case -ENOTEMPTY:
635 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
636 opt->name);
637 break;
638 case -EBUSY:
639 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
640 opt->name);
641 break;
642 default:
643 break;
644 }
645}
646
647/**
648 * __bond_opt_set - set a bonding option
649 * @bond: target bond device
650 * @option: option to set
651 * @val: value to set it to
652 *
653 * This function is used to change the bond's option value, it can be
654 * used for both enabling/changing an option and for disabling it. RTNL lock
655 * must be obtained before calling this function.
656 */
657int __bond_opt_set(struct bonding *bond,
658 unsigned int option, struct bond_opt_value *val)
659{
660 const struct bond_opt_value *retval = NULL;
661 const struct bond_option *opt;
662 int ret = -ENOENT;
663
664 ASSERT_RTNL();
665
666 opt = bond_opt_get(option);
667 if (WARN_ON(!val) || WARN_ON(!opt))
668 goto out;
669 ret = bond_opt_check_deps(bond, opt);
670 if (ret)
671 goto out;
672 retval = bond_opt_parse(opt, val);
673 if (!retval) {
674 ret = -EINVAL;
675 goto out;
676 }
677 ret = opt->set(bond, retval);
678out:
679 if (ret)
680 bond_opt_error_interpret(bond, opt, ret, val);
681
682 return ret;
683}
684/**
685 * __bond_opt_set_notify - set a bonding option
686 * @bond: target bond device
687 * @option: option to set
688 * @val: value to set it to
689 *
690 * This function is used to change the bond's option value and trigger
691 * a notification to user sapce. It can be used for both enabling/changing
692 * an option and for disabling it. RTNL lock must be obtained before calling
693 * this function.
694 */
695int __bond_opt_set_notify(struct bonding *bond,
696 unsigned int option, struct bond_opt_value *val)
697{
698 int ret = -ENOENT;
699
700 ASSERT_RTNL();
701
702 ret = __bond_opt_set(bond, option, val);
703
704 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
705 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
706
707 return ret;
708}
709
710/**
711 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
712 * @bond: target bond device
713 * @option: option to set
714 * @buf: value to set it to
715 *
716 * This function tries to acquire RTNL without blocking and if successful
717 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
718 */
719int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
720{
721 struct bond_opt_value optval;
722 int ret;
723
724 if (!rtnl_trylock())
725 return restart_syscall();
726 bond_opt_initstr(&optval, buf);
727 ret = __bond_opt_set_notify(bond, option, &optval);
728 rtnl_unlock();
729
730 return ret;
731}
732
733/**
734 * bond_opt_get - get a pointer to an option
735 * @option: option for which to return a pointer
736 *
737 * This function checks if option is valid and if so returns a pointer
738 * to its entry in the bond_opts[] option array.
739 */
740const struct bond_option *bond_opt_get(unsigned int option)
741{
742 if (!BOND_OPT_VALID(option))
743 return NULL;
744
745 return &bond_opts[option];
746}
747
748static int bond_option_mode_set(struct bonding *bond,
749 const struct bond_opt_value *newval)
750{
751 if (!bond_mode_uses_arp(newval->value)) {
752 if (bond->params.arp_interval) {
753 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
754 newval->string);
755 /* disable arp monitoring */
756 bond->params.arp_interval = 0;
757 }
758
759 if (!bond->params.miimon) {
760 /* set miimon to default value */
761 bond->params.miimon = BOND_DEFAULT_MIIMON;
762 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
763 bond->params.miimon);
764 }
765 }
766
767 if (newval->value == BOND_MODE_ALB)
768 bond->params.tlb_dynamic_lb = 1;
769
770 /* don't cache arp_validate between modes */
771 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
772 bond->params.mode = newval->value;
773
774 return 0;
775}
776
777static int bond_option_active_slave_set(struct bonding *bond,
778 const struct bond_opt_value *newval)
779{
780 char ifname[IFNAMSIZ] = { 0, };
781 struct net_device *slave_dev;
782 int ret = 0;
783
784 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
785 if (!strlen(ifname) || newval->string[0] == '\n') {
786 slave_dev = NULL;
787 } else {
788 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
789 if (!slave_dev)
790 return -ENODEV;
791 }
792
793 if (slave_dev) {
794 if (!netif_is_bond_slave(slave_dev)) {
795 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
796 return -EINVAL;
797 }
798
799 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
800 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
801 return -EINVAL;
802 }
803 }
804
805 block_netpoll_tx();
806 /* check to see if we are clearing active */
807 if (!slave_dev) {
808 netdev_dbg(bond->dev, "Clearing current active slave\n");
809 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
810 bond_select_active_slave(bond);
811 } else {
812 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
813 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
814
815 BUG_ON(!new_active);
816
817 if (new_active == old_active) {
818 /* do nothing */
819 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
820 } else {
821 if (old_active && (new_active->link == BOND_LINK_UP) &&
822 bond_slave_is_up(new_active)) {
823 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
824 bond_change_active_slave(bond, new_active);
825 } else {
826 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
827 new_active->dev->name);
828 ret = -EINVAL;
829 }
830 }
831 }
832 unblock_netpoll_tx();
833
834 return ret;
835}
836
837/* There are two tricky bits here. First, if MII monitoring is activated, then
838 * we must disable ARP monitoring. Second, if the timer isn't running, we must
839 * start it.
840 */
841static int bond_option_miimon_set(struct bonding *bond,
842 const struct bond_opt_value *newval)
843{
844 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
845 newval->value);
846 bond->params.miimon = newval->value;
847 if (bond->params.updelay)
848 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
849 bond->params.updelay * bond->params.miimon);
850 if (bond->params.downdelay)
851 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
852 bond->params.downdelay * bond->params.miimon);
853 if (bond->params.peer_notif_delay)
854 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
855 bond->params.peer_notif_delay * bond->params.miimon);
856 if (newval->value && bond->params.arp_interval) {
857 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
858 bond->params.arp_interval = 0;
859 if (bond->params.arp_validate)
860 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
861 }
862 if (bond->dev->flags & IFF_UP) {
863 /* If the interface is up, we may need to fire off
864 * the MII timer. If the interface is down, the
865 * timer will get fired off when the open function
866 * is called.
867 */
868 if (!newval->value) {
869 cancel_delayed_work_sync(&bond->mii_work);
870 } else {
871 cancel_delayed_work_sync(&bond->arp_work);
872 queue_delayed_work(bond->wq, &bond->mii_work, 0);
873 }
874 }
875
876 return 0;
877}
878
879/* Set up, down and peer notification delays. These must be multiples
880 * of the MII monitoring value, and are stored internally as the
881 * multiplier. Thus, we must translate to MS for the real world.
882 */
883static int _bond_option_delay_set(struct bonding *bond,
884 const struct bond_opt_value *newval,
885 const char *name,
886 int *target)
887{
888 int value = newval->value;
889
890 if (!bond->params.miimon) {
891 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
892 name);
893 return -EPERM;
894 }
895 if ((value % bond->params.miimon) != 0) {
896 netdev_warn(bond->dev,
897 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
898 name,
899 value, bond->params.miimon,
900 (value / bond->params.miimon) *
901 bond->params.miimon);
902 }
903 *target = value / bond->params.miimon;
904 netdev_dbg(bond->dev, "Setting %s to %d\n",
905 name,
906 *target * bond->params.miimon);
907
908 return 0;
909}
910
911static int bond_option_updelay_set(struct bonding *bond,
912 const struct bond_opt_value *newval)
913{
914 return _bond_option_delay_set(bond, newval, "up delay",
915 &bond->params.updelay);
916}
917
918static int bond_option_downdelay_set(struct bonding *bond,
919 const struct bond_opt_value *newval)
920{
921 return _bond_option_delay_set(bond, newval, "down delay",
922 &bond->params.downdelay);
923}
924
925static int bond_option_peer_notif_delay_set(struct bonding *bond,
926 const struct bond_opt_value *newval)
927{
928 int ret = _bond_option_delay_set(bond, newval,
929 "peer notification delay",
930 &bond->params.peer_notif_delay);
931 return ret;
932}
933
934static int bond_option_use_carrier_set(struct bonding *bond,
935 const struct bond_opt_value *newval)
936{
937 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
938 newval->value);
939 bond->params.use_carrier = newval->value;
940
941 return 0;
942}
943
944/* There are two tricky bits here. First, if ARP monitoring is activated, then
945 * we must disable MII monitoring. Second, if the ARP timer isn't running,
946 * we must start it.
947 */
948static int bond_option_arp_interval_set(struct bonding *bond,
949 const struct bond_opt_value *newval)
950{
951 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
952 newval->value);
953 bond->params.arp_interval = newval->value;
954 if (newval->value) {
955 if (bond->params.miimon) {
956 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
957 bond->params.miimon = 0;
958 }
959 if (!bond->params.arp_targets[0])
960 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
961 }
962 if (bond->dev->flags & IFF_UP) {
963 /* If the interface is up, we may need to fire off
964 * the ARP timer. If the interface is down, the
965 * timer will get fired off when the open function
966 * is called.
967 */
968 if (!newval->value) {
969 if (bond->params.arp_validate)
970 bond->recv_probe = NULL;
971 cancel_delayed_work_sync(&bond->arp_work);
972 } else {
973 /* arp_validate can be set only in active-backup mode */
974 bond->recv_probe = bond_arp_rcv;
975 cancel_delayed_work_sync(&bond->mii_work);
976 queue_delayed_work(bond->wq, &bond->arp_work, 0);
977 }
978 }
979
980 return 0;
981}
982
983static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
984 __be32 target,
985 unsigned long last_rx)
986{
987 __be32 *targets = bond->params.arp_targets;
988 struct list_head *iter;
989 struct slave *slave;
990
991 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
992 bond_for_each_slave(bond, slave, iter)
993 slave->target_last_arp_rx[slot] = last_rx;
994 targets[slot] = target;
995 }
996}
997
998static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
999{
1000 __be32 *targets = bond->params.arp_targets;
1001 int ind;
1002
1003 if (!bond_is_ip_target_ok(target)) {
1004 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1005 &target);
1006 return -EINVAL;
1007 }
1008
1009 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1010 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1011 &target);
1012 return -EINVAL;
1013 }
1014
1015 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1016 if (ind == -1) {
1017 netdev_err(bond->dev, "ARP target table is full!\n");
1018 return -EINVAL;
1019 }
1020
1021 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1022
1023 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1024
1025 return 0;
1026}
1027
1028static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1029{
1030 return _bond_option_arp_ip_target_add(bond, target);
1031}
1032
1033static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1034{
1035 __be32 *targets = bond->params.arp_targets;
1036 struct list_head *iter;
1037 struct slave *slave;
1038 unsigned long *targets_rx;
1039 int ind, i;
1040
1041 if (!bond_is_ip_target_ok(target)) {
1042 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1043 &target);
1044 return -EINVAL;
1045 }
1046
1047 ind = bond_get_targets_ip(targets, target);
1048 if (ind == -1) {
1049 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1050 &target);
1051 return -EINVAL;
1052 }
1053
1054 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1055 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1056
1057 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1058
1059 bond_for_each_slave(bond, slave, iter) {
1060 targets_rx = slave->target_last_arp_rx;
1061 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1062 targets_rx[i] = targets_rx[i+1];
1063 targets_rx[i] = 0;
1064 }
1065 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1066 targets[i] = targets[i+1];
1067 targets[i] = 0;
1068
1069 return 0;
1070}
1071
1072void bond_option_arp_ip_targets_clear(struct bonding *bond)
1073{
1074 int i;
1075
1076 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1077 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1078}
1079
1080static int bond_option_arp_ip_targets_set(struct bonding *bond,
1081 const struct bond_opt_value *newval)
1082{
1083 int ret = -EPERM;
1084 __be32 target;
1085
1086 if (newval->string) {
1087 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1088 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1089 &target);
1090 return ret;
1091 }
1092 if (newval->string[0] == '+')
1093 ret = bond_option_arp_ip_target_add(bond, target);
1094 else if (newval->string[0] == '-')
1095 ret = bond_option_arp_ip_target_rem(bond, target);
1096 else
1097 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1098 } else {
1099 target = newval->value;
1100 ret = bond_option_arp_ip_target_add(bond, target);
1101 }
1102
1103 return ret;
1104}
1105
1106static int bond_option_arp_validate_set(struct bonding *bond,
1107 const struct bond_opt_value *newval)
1108{
1109 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1110 newval->string, newval->value);
1111 bond->params.arp_validate = newval->value;
1112
1113 return 0;
1114}
1115
1116static int bond_option_arp_all_targets_set(struct bonding *bond,
1117 const struct bond_opt_value *newval)
1118{
1119 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1120 newval->string, newval->value);
1121 bond->params.arp_all_targets = newval->value;
1122
1123 return 0;
1124}
1125
1126static int bond_option_primary_set(struct bonding *bond,
1127 const struct bond_opt_value *newval)
1128{
1129 char *p, *primary = newval->string;
1130 struct list_head *iter;
1131 struct slave *slave;
1132
1133 block_netpoll_tx();
1134
1135 p = strchr(primary, '\n');
1136 if (p)
1137 *p = '\0';
1138 /* check to see if we are clearing primary */
1139 if (!strlen(primary)) {
1140 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1141 RCU_INIT_POINTER(bond->primary_slave, NULL);
1142 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1143 bond_select_active_slave(bond);
1144 goto out;
1145 }
1146
1147 bond_for_each_slave(bond, slave, iter) {
1148 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1149 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1150 rcu_assign_pointer(bond->primary_slave, slave);
1151 strcpy(bond->params.primary, slave->dev->name);
1152 bond->force_primary = true;
1153 bond_select_active_slave(bond);
1154 goto out;
1155 }
1156 }
1157
1158 if (rtnl_dereference(bond->primary_slave)) {
1159 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1160 RCU_INIT_POINTER(bond->primary_slave, NULL);
1161 bond_select_active_slave(bond);
1162 }
1163 strncpy(bond->params.primary, primary, IFNAMSIZ);
1164 bond->params.primary[IFNAMSIZ - 1] = 0;
1165
1166 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1167 primary);
1168
1169out:
1170 unblock_netpoll_tx();
1171
1172 return 0;
1173}
1174
1175static int bond_option_primary_reselect_set(struct bonding *bond,
1176 const struct bond_opt_value *newval)
1177{
1178 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1179 newval->string, newval->value);
1180 bond->params.primary_reselect = newval->value;
1181
1182 block_netpoll_tx();
1183 bond_select_active_slave(bond);
1184 unblock_netpoll_tx();
1185
1186 return 0;
1187}
1188
1189static int bond_option_fail_over_mac_set(struct bonding *bond,
1190 const struct bond_opt_value *newval)
1191{
1192 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1193 newval->string, newval->value);
1194 bond->params.fail_over_mac = newval->value;
1195
1196 return 0;
1197}
1198
1199static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1200 const struct bond_opt_value *newval)
1201{
1202 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1203 newval->string, newval->value);
1204 bond->params.xmit_policy = newval->value;
1205
1206 return 0;
1207}
1208
1209static int bond_option_resend_igmp_set(struct bonding *bond,
1210 const struct bond_opt_value *newval)
1211{
1212 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1213 newval->value);
1214 bond->params.resend_igmp = newval->value;
1215
1216 return 0;
1217}
1218
1219static int bond_option_num_peer_notif_set(struct bonding *bond,
1220 const struct bond_opt_value *newval)
1221{
1222 bond->params.num_peer_notif = newval->value;
1223
1224 return 0;
1225}
1226
1227static int bond_option_all_slaves_active_set(struct bonding *bond,
1228 const struct bond_opt_value *newval)
1229{
1230 struct list_head *iter;
1231 struct slave *slave;
1232
1233 if (newval->value == bond->params.all_slaves_active)
1234 return 0;
1235 bond->params.all_slaves_active = newval->value;
1236 bond_for_each_slave(bond, slave, iter) {
1237 if (!bond_is_active_slave(slave)) {
1238 if (newval->value)
1239 slave->inactive = 0;
1240 else
1241 slave->inactive = 1;
1242 }
1243 }
1244
1245 return 0;
1246}
1247
1248static int bond_option_min_links_set(struct bonding *bond,
1249 const struct bond_opt_value *newval)
1250{
1251 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1252 newval->value);
1253 bond->params.min_links = newval->value;
1254 bond_set_carrier(bond);
1255
1256 return 0;
1257}
1258
1259static int bond_option_lp_interval_set(struct bonding *bond,
1260 const struct bond_opt_value *newval)
1261{
1262 bond->params.lp_interval = newval->value;
1263
1264 return 0;
1265}
1266
1267static int bond_option_pps_set(struct bonding *bond,
1268 const struct bond_opt_value *newval)
1269{
1270 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1271 newval->value);
1272 bond->params.packets_per_slave = newval->value;
1273 if (newval->value > 0) {
1274 bond->params.reciprocal_packets_per_slave =
1275 reciprocal_value(newval->value);
1276 } else {
1277 /* reciprocal_packets_per_slave is unused if
1278 * packets_per_slave is 0 or 1, just initialize it
1279 */
1280 bond->params.reciprocal_packets_per_slave =
1281 (struct reciprocal_value) { 0 };
1282 }
1283
1284 return 0;
1285}
1286
1287static int bond_option_lacp_rate_set(struct bonding *bond,
1288 const struct bond_opt_value *newval)
1289{
1290 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1291 newval->string, newval->value);
1292 bond->params.lacp_fast = newval->value;
1293 bond_3ad_update_lacp_rate(bond);
1294
1295 return 0;
1296}
1297
1298static int bond_option_ad_select_set(struct bonding *bond,
1299 const struct bond_opt_value *newval)
1300{
1301 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1302 newval->string, newval->value);
1303 bond->params.ad_select = newval->value;
1304
1305 return 0;
1306}
1307
1308static int bond_option_queue_id_set(struct bonding *bond,
1309 const struct bond_opt_value *newval)
1310{
1311 struct slave *slave, *update_slave;
1312 struct net_device *sdev;
1313 struct list_head *iter;
1314 char *delim;
1315 int ret = 0;
1316 u16 qid;
1317
1318 /* delim will point to queue id if successful */
1319 delim = strchr(newval->string, ':');
1320 if (!delim)
1321 goto err_no_cmd;
1322
1323 /* Terminate string that points to device name and bump it
1324 * up one, so we can read the queue id there.
1325 */
1326 *delim = '\0';
1327 if (sscanf(++delim, "%hd\n", &qid) != 1)
1328 goto err_no_cmd;
1329
1330 /* Check buffer length, valid ifname and queue id */
1331 if (!dev_valid_name(newval->string) ||
1332 qid > bond->dev->real_num_tx_queues)
1333 goto err_no_cmd;
1334
1335 /* Get the pointer to that interface if it exists */
1336 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1337 if (!sdev)
1338 goto err_no_cmd;
1339
1340 /* Search for thes slave and check for duplicate qids */
1341 update_slave = NULL;
1342 bond_for_each_slave(bond, slave, iter) {
1343 if (sdev == slave->dev)
1344 /* We don't need to check the matching
1345 * slave for dups, since we're overwriting it
1346 */
1347 update_slave = slave;
1348 else if (qid && qid == slave->queue_id) {
1349 goto err_no_cmd;
1350 }
1351 }
1352
1353 if (!update_slave)
1354 goto err_no_cmd;
1355
1356 /* Actually set the qids for the slave */
1357 update_slave->queue_id = qid;
1358
1359out:
1360 return ret;
1361
1362err_no_cmd:
1363 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1364 ret = -EPERM;
1365 goto out;
1366
1367}
1368
1369static int bond_option_slaves_set(struct bonding *bond,
1370 const struct bond_opt_value *newval)
1371{
1372 char command[IFNAMSIZ + 1] = { 0, };
1373 struct net_device *dev;
1374 char *ifname;
1375 int ret;
1376
1377 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1378 ifname = command + 1;
1379 if ((strlen(command) <= 1) ||
1380 (command[0] != '+' && command[0] != '-') ||
1381 !dev_valid_name(ifname))
1382 goto err_no_cmd;
1383
1384 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1385 if (!dev) {
1386 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1387 ifname);
1388 ret = -ENODEV;
1389 goto out;
1390 }
1391
1392 switch (command[0]) {
1393 case '+':
1394 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1395 ret = bond_enslave(bond->dev, dev, NULL);
1396 break;
1397
1398 case '-':
1399 slave_dbg(bond->dev, dev, "Releasing interface\n");
1400 ret = bond_release(bond->dev, dev);
1401 break;
1402
1403 default:
1404 /* should not run here. */
1405 goto err_no_cmd;
1406 }
1407
1408out:
1409 return ret;
1410
1411err_no_cmd:
1412 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1413 ret = -EPERM;
1414 goto out;
1415}
1416
1417static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1418 const struct bond_opt_value *newval)
1419{
1420 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1421 newval->string, newval->value);
1422 bond->params.tlb_dynamic_lb = newval->value;
1423
1424 return 0;
1425}
1426
1427static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1428 const struct bond_opt_value *newval)
1429{
1430 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1431 newval->value);
1432
1433 bond->params.ad_actor_sys_prio = newval->value;
1434 bond_3ad_update_ad_actor_settings(bond);
1435
1436 return 0;
1437}
1438
1439static int bond_option_ad_actor_system_set(struct bonding *bond,
1440 const struct bond_opt_value *newval)
1441{
1442 u8 macaddr[ETH_ALEN];
1443 u8 *mac;
1444
1445 if (newval->string) {
1446 if (!mac_pton(newval->string, macaddr))
1447 goto err;
1448 mac = macaddr;
1449 } else {
1450 mac = (u8 *)&newval->value;
1451 }
1452
1453 if (!is_valid_ether_addr(mac))
1454 goto err;
1455
1456 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1457 ether_addr_copy(bond->params.ad_actor_system, mac);
1458 bond_3ad_update_ad_actor_settings(bond);
1459
1460 return 0;
1461
1462err:
1463 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1464 return -EINVAL;
1465}
1466
1467static int bond_option_ad_user_port_key_set(struct bonding *bond,
1468 const struct bond_opt_value *newval)
1469{
1470 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1471 newval->value);
1472
1473 bond->params.ad_user_port_key = newval->value;
1474 return 0;
1475}
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * drivers/net/bond/bond_options.c - bonding options
4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us>
5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com>
6 */
7
8#include <linux/errno.h>
9#include <linux/if.h>
10#include <linux/netdevice.h>
11#include <linux/spinlock.h>
12#include <linux/rcupdate.h>
13#include <linux/ctype.h>
14#include <linux/inet.h>
15#include <linux/sched/signal.h>
16
17#include <net/bonding.h>
18
19static int bond_option_active_slave_set(struct bonding *bond,
20 const struct bond_opt_value *newval);
21static int bond_option_miimon_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23static int bond_option_updelay_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25static int bond_option_downdelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27static int bond_option_peer_notif_delay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29static int bond_option_use_carrier_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31static int bond_option_arp_interval_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
34static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
35static int bond_option_arp_ip_targets_set(struct bonding *bond,
36 const struct bond_opt_value *newval);
37static int bond_option_ns_ip6_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39static int bond_option_arp_validate_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41static int bond_option_arp_all_targets_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43static int bond_option_prio_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45static int bond_option_primary_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47static int bond_option_primary_reselect_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49static int bond_option_fail_over_mac_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51static int bond_option_xmit_hash_policy_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53static int bond_option_resend_igmp_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55static int bond_option_num_peer_notif_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57static int bond_option_all_slaves_active_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59static int bond_option_min_links_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61static int bond_option_lp_interval_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63static int bond_option_pps_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65static int bond_option_lacp_active_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67static int bond_option_lacp_rate_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69static int bond_option_ad_select_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71static int bond_option_queue_id_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73static int bond_option_mode_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75static int bond_option_slaves_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
80 const struct bond_opt_value *newval);
81static int bond_option_ad_actor_system_set(struct bonding *bond,
82 const struct bond_opt_value *newval);
83static int bond_option_ad_user_port_key_set(struct bonding *bond,
84 const struct bond_opt_value *newval);
85static int bond_option_missed_max_set(struct bonding *bond,
86 const struct bond_opt_value *newval);
87
88
89static const struct bond_opt_value bond_mode_tbl[] = {
90 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
91 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
92 { "balance-xor", BOND_MODE_XOR, 0},
93 { "broadcast", BOND_MODE_BROADCAST, 0},
94 { "802.3ad", BOND_MODE_8023AD, 0},
95 { "balance-tlb", BOND_MODE_TLB, 0},
96 { "balance-alb", BOND_MODE_ALB, 0},
97 { NULL, -1, 0},
98};
99
100static const struct bond_opt_value bond_pps_tbl[] = {
101 { "default", 1, BOND_VALFLAG_DEFAULT},
102 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
103 { NULL, -1, 0},
104};
105
106static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
107 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
108 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
109 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
110 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
111 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
112 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
113 { NULL, -1, 0},
114};
115
116static const struct bond_opt_value bond_arp_validate_tbl[] = {
117 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
118 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
119 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
120 { "all", BOND_ARP_VALIDATE_ALL, 0},
121 { "filter", BOND_ARP_FILTER, 0},
122 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
123 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
124 { NULL, -1, 0},
125};
126
127static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
128 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
129 { "all", BOND_ARP_TARGETS_ALL, 0},
130 { NULL, -1, 0},
131};
132
133static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
134 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
135 { "active", BOND_FOM_ACTIVE, 0},
136 { "follow", BOND_FOM_FOLLOW, 0},
137 { NULL, -1, 0},
138};
139
140static const struct bond_opt_value bond_intmax_tbl[] = {
141 { "off", 0, BOND_VALFLAG_DEFAULT},
142 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
143 { NULL, -1, 0}
144};
145
146static const struct bond_opt_value bond_lacp_active[] = {
147 { "off", 0, 0},
148 { "on", 1, BOND_VALFLAG_DEFAULT},
149 { NULL, -1, 0}
150};
151
152static const struct bond_opt_value bond_lacp_rate_tbl[] = {
153 { "slow", AD_LACP_SLOW, 0},
154 { "fast", AD_LACP_FAST, 0},
155 { NULL, -1, 0},
156};
157
158static const struct bond_opt_value bond_ad_select_tbl[] = {
159 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
160 { "bandwidth", BOND_AD_BANDWIDTH, 0},
161 { "count", BOND_AD_COUNT, 0},
162 { NULL, -1, 0},
163};
164
165static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
166 { "off", 0, 0},
167 { "maxval", 255, BOND_VALFLAG_MAX},
168 { "default", 1, BOND_VALFLAG_DEFAULT},
169 { NULL, -1, 0}
170};
171
172static const struct bond_opt_value bond_primary_reselect_tbl[] = {
173 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
174 { "better", BOND_PRI_RESELECT_BETTER, 0},
175 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
176 { NULL, -1},
177};
178
179static const struct bond_opt_value bond_use_carrier_tbl[] = {
180 { "off", 0, 0},
181 { "on", 1, BOND_VALFLAG_DEFAULT},
182 { NULL, -1, 0}
183};
184
185static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
186 { "off", 0, BOND_VALFLAG_DEFAULT},
187 { "on", 1, 0},
188 { NULL, -1, 0}
189};
190
191static const struct bond_opt_value bond_resend_igmp_tbl[] = {
192 { "off", 0, 0},
193 { "maxval", 255, BOND_VALFLAG_MAX},
194 { "default", 1, BOND_VALFLAG_DEFAULT},
195 { NULL, -1, 0}
196};
197
198static const struct bond_opt_value bond_lp_interval_tbl[] = {
199 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
200 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
201 { NULL, -1, 0},
202};
203
204static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
205 { "off", 0, 0},
206 { "on", 1, BOND_VALFLAG_DEFAULT},
207 { NULL, -1, 0}
208};
209
210static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
211 { "minval", 1, BOND_VALFLAG_MIN},
212 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
213 { NULL, -1, 0},
214};
215
216static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
217 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
218 { "maxval", 1023, BOND_VALFLAG_MAX},
219 { NULL, -1, 0},
220};
221
222static const struct bond_opt_value bond_missed_max_tbl[] = {
223 { "minval", 1, BOND_VALFLAG_MIN},
224 { "maxval", 255, BOND_VALFLAG_MAX},
225 { "default", 2, BOND_VALFLAG_DEFAULT},
226 { NULL, -1, 0},
227};
228
229static const struct bond_option bond_opts[BOND_OPT_LAST] = {
230 [BOND_OPT_MODE] = {
231 .id = BOND_OPT_MODE,
232 .name = "mode",
233 .desc = "bond device mode",
234 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
235 .values = bond_mode_tbl,
236 .set = bond_option_mode_set
237 },
238 [BOND_OPT_PACKETS_PER_SLAVE] = {
239 .id = BOND_OPT_PACKETS_PER_SLAVE,
240 .name = "packets_per_slave",
241 .desc = "Packets to send per slave in RR mode",
242 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
243 .values = bond_pps_tbl,
244 .set = bond_option_pps_set
245 },
246 [BOND_OPT_XMIT_HASH] = {
247 .id = BOND_OPT_XMIT_HASH,
248 .name = "xmit_hash_policy",
249 .desc = "balance-xor, 802.3ad, and tlb hashing method",
250 .values = bond_xmit_hashtype_tbl,
251 .set = bond_option_xmit_hash_policy_set
252 },
253 [BOND_OPT_ARP_VALIDATE] = {
254 .id = BOND_OPT_ARP_VALIDATE,
255 .name = "arp_validate",
256 .desc = "validate src/dst of ARP probes",
257 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
258 BIT(BOND_MODE_ALB),
259 .values = bond_arp_validate_tbl,
260 .set = bond_option_arp_validate_set
261 },
262 [BOND_OPT_ARP_ALL_TARGETS] = {
263 .id = BOND_OPT_ARP_ALL_TARGETS,
264 .name = "arp_all_targets",
265 .desc = "fail on any/all arp targets timeout",
266 .values = bond_arp_all_targets_tbl,
267 .set = bond_option_arp_all_targets_set
268 },
269 [BOND_OPT_FAIL_OVER_MAC] = {
270 .id = BOND_OPT_FAIL_OVER_MAC,
271 .name = "fail_over_mac",
272 .desc = "For active-backup, do not set all slaves to the same MAC",
273 .flags = BOND_OPTFLAG_NOSLAVES,
274 .values = bond_fail_over_mac_tbl,
275 .set = bond_option_fail_over_mac_set
276 },
277 [BOND_OPT_ARP_INTERVAL] = {
278 .id = BOND_OPT_ARP_INTERVAL,
279 .name = "arp_interval",
280 .desc = "arp interval in milliseconds",
281 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
282 BIT(BOND_MODE_ALB),
283 .values = bond_intmax_tbl,
284 .set = bond_option_arp_interval_set
285 },
286 [BOND_OPT_MISSED_MAX] = {
287 .id = BOND_OPT_MISSED_MAX,
288 .name = "arp_missed_max",
289 .desc = "Maximum number of missed ARP interval",
290 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
291 BIT(BOND_MODE_ALB),
292 .values = bond_missed_max_tbl,
293 .set = bond_option_missed_max_set
294 },
295 [BOND_OPT_ARP_TARGETS] = {
296 .id = BOND_OPT_ARP_TARGETS,
297 .name = "arp_ip_target",
298 .desc = "arp targets in n.n.n.n form",
299 .flags = BOND_OPTFLAG_RAWVAL,
300 .set = bond_option_arp_ip_targets_set
301 },
302 [BOND_OPT_NS_TARGETS] = {
303 .id = BOND_OPT_NS_TARGETS,
304 .name = "ns_ip6_target",
305 .desc = "NS targets in ffff:ffff::ffff:ffff form",
306 .flags = BOND_OPTFLAG_RAWVAL,
307 .set = bond_option_ns_ip6_targets_set
308 },
309 [BOND_OPT_DOWNDELAY] = {
310 .id = BOND_OPT_DOWNDELAY,
311 .name = "downdelay",
312 .desc = "Delay before considering link down, in milliseconds",
313 .values = bond_intmax_tbl,
314 .set = bond_option_downdelay_set
315 },
316 [BOND_OPT_UPDELAY] = {
317 .id = BOND_OPT_UPDELAY,
318 .name = "updelay",
319 .desc = "Delay before considering link up, in milliseconds",
320 .values = bond_intmax_tbl,
321 .set = bond_option_updelay_set
322 },
323 [BOND_OPT_LACP_ACTIVE] = {
324 .id = BOND_OPT_LACP_ACTIVE,
325 .name = "lacp_active",
326 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
327 .flags = BOND_OPTFLAG_IFDOWN,
328 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
329 .values = bond_lacp_active,
330 .set = bond_option_lacp_active_set
331 },
332 [BOND_OPT_LACP_RATE] = {
333 .id = BOND_OPT_LACP_RATE,
334 .name = "lacp_rate",
335 .desc = "LACPDU tx rate to request from 802.3ad partner",
336 .flags = BOND_OPTFLAG_IFDOWN,
337 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
338 .values = bond_lacp_rate_tbl,
339 .set = bond_option_lacp_rate_set
340 },
341 [BOND_OPT_MINLINKS] = {
342 .id = BOND_OPT_MINLINKS,
343 .name = "min_links",
344 .desc = "Minimum number of available links before turning on carrier",
345 .values = bond_intmax_tbl,
346 .set = bond_option_min_links_set
347 },
348 [BOND_OPT_AD_SELECT] = {
349 .id = BOND_OPT_AD_SELECT,
350 .name = "ad_select",
351 .desc = "803.ad aggregation selection logic",
352 .flags = BOND_OPTFLAG_IFDOWN,
353 .values = bond_ad_select_tbl,
354 .set = bond_option_ad_select_set
355 },
356 [BOND_OPT_NUM_PEER_NOTIF] = {
357 .id = BOND_OPT_NUM_PEER_NOTIF,
358 .name = "num_unsol_na",
359 .desc = "Number of peer notifications to send on failover event",
360 .values = bond_num_peer_notif_tbl,
361 .set = bond_option_num_peer_notif_set
362 },
363 [BOND_OPT_MIIMON] = {
364 .id = BOND_OPT_MIIMON,
365 .name = "miimon",
366 .desc = "Link check interval in milliseconds",
367 .values = bond_intmax_tbl,
368 .set = bond_option_miimon_set
369 },
370 [BOND_OPT_PRIO] = {
371 .id = BOND_OPT_PRIO,
372 .name = "prio",
373 .desc = "Link priority for failover re-selection",
374 .flags = BOND_OPTFLAG_RAWVAL,
375 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
376 BIT(BOND_MODE_TLB) |
377 BIT(BOND_MODE_ALB)),
378 .set = bond_option_prio_set
379 },
380 [BOND_OPT_PRIMARY] = {
381 .id = BOND_OPT_PRIMARY,
382 .name = "primary",
383 .desc = "Primary network device to use",
384 .flags = BOND_OPTFLAG_RAWVAL,
385 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
386 BIT(BOND_MODE_TLB) |
387 BIT(BOND_MODE_ALB)),
388 .set = bond_option_primary_set
389 },
390 [BOND_OPT_PRIMARY_RESELECT] = {
391 .id = BOND_OPT_PRIMARY_RESELECT,
392 .name = "primary_reselect",
393 .desc = "Reselect primary slave once it comes up",
394 .values = bond_primary_reselect_tbl,
395 .set = bond_option_primary_reselect_set
396 },
397 [BOND_OPT_USE_CARRIER] = {
398 .id = BOND_OPT_USE_CARRIER,
399 .name = "use_carrier",
400 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
401 .values = bond_use_carrier_tbl,
402 .set = bond_option_use_carrier_set
403 },
404 [BOND_OPT_ACTIVE_SLAVE] = {
405 .id = BOND_OPT_ACTIVE_SLAVE,
406 .name = "active_slave",
407 .desc = "Currently active slave",
408 .flags = BOND_OPTFLAG_RAWVAL,
409 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
410 BIT(BOND_MODE_TLB) |
411 BIT(BOND_MODE_ALB)),
412 .set = bond_option_active_slave_set
413 },
414 [BOND_OPT_QUEUE_ID] = {
415 .id = BOND_OPT_QUEUE_ID,
416 .name = "queue_id",
417 .desc = "Set queue id of a slave",
418 .flags = BOND_OPTFLAG_RAWVAL,
419 .set = bond_option_queue_id_set
420 },
421 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
422 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
423 .name = "all_slaves_active",
424 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
425 .values = bond_all_slaves_active_tbl,
426 .set = bond_option_all_slaves_active_set
427 },
428 [BOND_OPT_RESEND_IGMP] = {
429 .id = BOND_OPT_RESEND_IGMP,
430 .name = "resend_igmp",
431 .desc = "Number of IGMP membership reports to send on link failure",
432 .values = bond_resend_igmp_tbl,
433 .set = bond_option_resend_igmp_set
434 },
435 [BOND_OPT_LP_INTERVAL] = {
436 .id = BOND_OPT_LP_INTERVAL,
437 .name = "lp_interval",
438 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
439 .values = bond_lp_interval_tbl,
440 .set = bond_option_lp_interval_set
441 },
442 [BOND_OPT_SLAVES] = {
443 .id = BOND_OPT_SLAVES,
444 .name = "slaves",
445 .desc = "Slave membership management",
446 .flags = BOND_OPTFLAG_RAWVAL,
447 .set = bond_option_slaves_set
448 },
449 [BOND_OPT_TLB_DYNAMIC_LB] = {
450 .id = BOND_OPT_TLB_DYNAMIC_LB,
451 .name = "tlb_dynamic_lb",
452 .desc = "Enable dynamic flow shuffling",
453 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
454 .values = bond_tlb_dynamic_lb_tbl,
455 .flags = BOND_OPTFLAG_IFDOWN,
456 .set = bond_option_tlb_dynamic_lb_set,
457 },
458 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
459 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
460 .name = "ad_actor_sys_prio",
461 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
462 .values = bond_ad_actor_sys_prio_tbl,
463 .set = bond_option_ad_actor_sys_prio_set,
464 },
465 [BOND_OPT_AD_ACTOR_SYSTEM] = {
466 .id = BOND_OPT_AD_ACTOR_SYSTEM,
467 .name = "ad_actor_system",
468 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
469 .flags = BOND_OPTFLAG_RAWVAL,
470 .set = bond_option_ad_actor_system_set,
471 },
472 [BOND_OPT_AD_USER_PORT_KEY] = {
473 .id = BOND_OPT_AD_USER_PORT_KEY,
474 .name = "ad_user_port_key",
475 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
476 .flags = BOND_OPTFLAG_IFDOWN,
477 .values = bond_ad_user_port_key_tbl,
478 .set = bond_option_ad_user_port_key_set,
479 },
480 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
481 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
482 .name = "num_grat_arp",
483 .desc = "Number of peer notifications to send on failover event",
484 .values = bond_num_peer_notif_tbl,
485 .set = bond_option_num_peer_notif_set
486 },
487 [BOND_OPT_PEER_NOTIF_DELAY] = {
488 .id = BOND_OPT_PEER_NOTIF_DELAY,
489 .name = "peer_notif_delay",
490 .desc = "Delay between each peer notification on failover event, in milliseconds",
491 .values = bond_intmax_tbl,
492 .set = bond_option_peer_notif_delay_set
493 }
494};
495
496/* Searches for an option by name */
497const struct bond_option *bond_opt_get_by_name(const char *name)
498{
499 const struct bond_option *opt;
500 int option;
501
502 for (option = 0; option < BOND_OPT_LAST; option++) {
503 opt = bond_opt_get(option);
504 if (opt && !strcmp(opt->name, name))
505 return opt;
506 }
507
508 return NULL;
509}
510
511/* Searches for a value in opt's values[] table */
512const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
513{
514 const struct bond_option *opt;
515 int i;
516
517 opt = bond_opt_get(option);
518 if (WARN_ON(!opt))
519 return NULL;
520 for (i = 0; opt->values && opt->values[i].string; i++)
521 if (opt->values[i].value == val)
522 return &opt->values[i];
523
524 return NULL;
525}
526
527/* Searches for a value in opt's values[] table which matches the flagmask */
528static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
529 u32 flagmask)
530{
531 int i;
532
533 for (i = 0; opt->values && opt->values[i].string; i++)
534 if (opt->values[i].flags & flagmask)
535 return &opt->values[i];
536
537 return NULL;
538}
539
540/* If maxval is missing then there's no range to check. In case minval is
541 * missing then it's considered to be 0.
542 */
543static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
544{
545 const struct bond_opt_value *minval, *maxval;
546
547 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
548 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
549 if (!maxval || (minval && val < minval->value) || val > maxval->value)
550 return false;
551
552 return true;
553}
554
555/**
556 * bond_opt_parse - parse option value
557 * @opt: the option to parse against
558 * @val: value to parse
559 *
560 * This function tries to extract the value from @val and check if it's
561 * a possible match for the option and returns NULL if a match isn't found,
562 * or the struct_opt_value that matched. It also strips the new line from
563 * @val->string if it's present.
564 */
565const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
566 struct bond_opt_value *val)
567{
568 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
569 const struct bond_opt_value *tbl;
570 const struct bond_opt_value *ret = NULL;
571 bool checkval;
572 int i, rv;
573
574 /* No parsing if the option wants a raw val */
575 if (opt->flags & BOND_OPTFLAG_RAWVAL)
576 return val;
577
578 tbl = opt->values;
579 if (!tbl)
580 goto out;
581
582 /* ULLONG_MAX is used to bypass string processing */
583 checkval = val->value != ULLONG_MAX;
584 if (!checkval) {
585 if (!val->string)
586 goto out;
587 p = strchr(val->string, '\n');
588 if (p)
589 *p = '\0';
590 for (p = val->string; *p; p++)
591 if (!(isdigit(*p) || isspace(*p)))
592 break;
593 /* The following code extracts the string to match or the value
594 * and sets checkval appropriately
595 */
596 if (*p) {
597 rv = sscanf(val->string, "%32s", valstr);
598 } else {
599 rv = sscanf(val->string, "%llu", &val->value);
600 checkval = true;
601 }
602 if (!rv)
603 goto out;
604 }
605
606 for (i = 0; tbl[i].string; i++) {
607 /* Check for exact match */
608 if (checkval) {
609 if (val->value == tbl[i].value)
610 ret = &tbl[i];
611 } else {
612 if (!strcmp(valstr, "default") &&
613 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
614 ret = &tbl[i];
615
616 if (!strcmp(valstr, tbl[i].string))
617 ret = &tbl[i];
618 }
619 /* Found an exact match */
620 if (ret)
621 goto out;
622 }
623 /* Possible range match */
624 if (checkval && bond_opt_check_range(opt, val->value))
625 ret = val;
626out:
627 return ret;
628}
629
630/* Check opt's dependencies against bond mode and currently set options */
631static int bond_opt_check_deps(struct bonding *bond,
632 const struct bond_option *opt)
633{
634 struct bond_params *params = &bond->params;
635
636 if (test_bit(params->mode, &opt->unsuppmodes))
637 return -EACCES;
638 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
639 return -ENOTEMPTY;
640 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
641 return -EBUSY;
642
643 return 0;
644}
645
646static void bond_opt_dep_print(struct bonding *bond,
647 const struct bond_option *opt,
648 struct nlattr *bad_attr,
649 struct netlink_ext_ack *extack)
650{
651 const struct bond_opt_value *modeval;
652 struct bond_params *params;
653
654 params = &bond->params;
655 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
656 if (test_bit(params->mode, &opt->unsuppmodes)) {
657 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
658 opt->name, modeval->string, modeval->value);
659 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
660 "option not supported in mode");
661 }
662}
663
664static void bond_opt_error_interpret(struct bonding *bond,
665 const struct bond_option *opt,
666 int error, const struct bond_opt_value *val,
667 struct nlattr *bad_attr,
668 struct netlink_ext_ack *extack)
669{
670 const struct bond_opt_value *minval, *maxval;
671 char *p;
672
673 switch (error) {
674 case -EINVAL:
675 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
676 if (val) {
677 if (val->string) {
678 /* sometimes RAWVAL opts may have new lines */
679 p = strchr(val->string, '\n');
680 if (p)
681 *p = '\0';
682 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
683 opt->name, val->string);
684 } else {
685 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
686 opt->name, val->value);
687 }
688 }
689 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
690 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
691 if (!maxval)
692 break;
693 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
694 opt->name, minval ? minval->value : 0, maxval->value);
695 break;
696 case -EACCES:
697 bond_opt_dep_print(bond, opt, bad_attr, extack);
698 break;
699 case -ENOTEMPTY:
700 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
701 "unable to set option because the bond device has slaves");
702 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
703 opt->name);
704 break;
705 case -EBUSY:
706 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
707 "unable to set option because the bond is up");
708 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
709 opt->name);
710 break;
711 case -ENODEV:
712 if (val && val->string) {
713 p = strchr(val->string, '\n');
714 if (p)
715 *p = '\0';
716 netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
717 opt->name, val->string);
718 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
719 "interface does not exist");
720 }
721 break;
722 default:
723 break;
724 }
725}
726
727/**
728 * __bond_opt_set - set a bonding option
729 * @bond: target bond device
730 * @option: option to set
731 * @val: value to set it to
732 * @bad_attr: netlink attribue that caused the error
733 * @extack: extended netlink error structure, used when an error message
734 * needs to be returned to the caller via netlink
735 *
736 * This function is used to change the bond's option value, it can be
737 * used for both enabling/changing an option and for disabling it. RTNL lock
738 * must be obtained before calling this function.
739 */
740int __bond_opt_set(struct bonding *bond,
741 unsigned int option, struct bond_opt_value *val,
742 struct nlattr *bad_attr, struct netlink_ext_ack *extack)
743{
744 const struct bond_opt_value *retval = NULL;
745 const struct bond_option *opt;
746 int ret = -ENOENT;
747
748 ASSERT_RTNL();
749
750 opt = bond_opt_get(option);
751 if (WARN_ON(!val) || WARN_ON(!opt))
752 goto out;
753 ret = bond_opt_check_deps(bond, opt);
754 if (ret)
755 goto out;
756 retval = bond_opt_parse(opt, val);
757 if (!retval) {
758 ret = -EINVAL;
759 goto out;
760 }
761 ret = opt->set(bond, retval);
762out:
763 if (ret)
764 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
765
766 return ret;
767}
768/**
769 * __bond_opt_set_notify - set a bonding option
770 * @bond: target bond device
771 * @option: option to set
772 * @val: value to set it to
773 *
774 * This function is used to change the bond's option value and trigger
775 * a notification to user sapce. It can be used for both enabling/changing
776 * an option and for disabling it. RTNL lock must be obtained before calling
777 * this function.
778 */
779int __bond_opt_set_notify(struct bonding *bond,
780 unsigned int option, struct bond_opt_value *val)
781{
782 int ret;
783
784 ASSERT_RTNL();
785
786 ret = __bond_opt_set(bond, option, val, NULL, NULL);
787
788 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
789 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
790
791 return ret;
792}
793
794/**
795 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
796 * @bond: target bond device
797 * @option: option to set
798 * @buf: value to set it to
799 *
800 * This function tries to acquire RTNL without blocking and if successful
801 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
802 */
803int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
804{
805 struct bond_opt_value optval;
806 int ret;
807
808 if (!rtnl_trylock())
809 return restart_syscall();
810 bond_opt_initstr(&optval, buf);
811 ret = __bond_opt_set_notify(bond, option, &optval);
812 rtnl_unlock();
813
814 return ret;
815}
816
817/**
818 * bond_opt_get - get a pointer to an option
819 * @option: option for which to return a pointer
820 *
821 * This function checks if option is valid and if so returns a pointer
822 * to its entry in the bond_opts[] option array.
823 */
824const struct bond_option *bond_opt_get(unsigned int option)
825{
826 if (!BOND_OPT_VALID(option))
827 return NULL;
828
829 return &bond_opts[option];
830}
831
832static bool bond_set_xfrm_features(struct bonding *bond)
833{
834 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
835 return false;
836
837 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
838 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
839 else
840 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
841
842 return true;
843}
844
845static int bond_option_mode_set(struct bonding *bond,
846 const struct bond_opt_value *newval)
847{
848 if (!bond_mode_uses_arp(newval->value)) {
849 if (bond->params.arp_interval) {
850 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
851 newval->string);
852 /* disable arp monitoring */
853 bond->params.arp_interval = 0;
854 }
855
856 if (!bond->params.miimon) {
857 /* set miimon to default value */
858 bond->params.miimon = BOND_DEFAULT_MIIMON;
859 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
860 bond->params.miimon);
861 }
862 }
863
864 if (newval->value == BOND_MODE_ALB)
865 bond->params.tlb_dynamic_lb = 1;
866
867 /* don't cache arp_validate between modes */
868 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
869 bond->params.mode = newval->value;
870
871 if (bond->dev->reg_state == NETREG_REGISTERED) {
872 bool update = false;
873
874 update |= bond_set_xfrm_features(bond);
875
876 if (update)
877 netdev_update_features(bond->dev);
878 }
879
880 return 0;
881}
882
883static int bond_option_active_slave_set(struct bonding *bond,
884 const struct bond_opt_value *newval)
885{
886 char ifname[IFNAMSIZ] = { 0, };
887 struct net_device *slave_dev;
888 int ret = 0;
889
890 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
891 if (!strlen(ifname) || newval->string[0] == '\n') {
892 slave_dev = NULL;
893 } else {
894 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
895 if (!slave_dev)
896 return -ENODEV;
897 }
898
899 if (slave_dev) {
900 if (!netif_is_bond_slave(slave_dev)) {
901 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
902 return -EINVAL;
903 }
904
905 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
906 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
907 return -EINVAL;
908 }
909 }
910
911 block_netpoll_tx();
912 /* check to see if we are clearing active */
913 if (!slave_dev) {
914 netdev_dbg(bond->dev, "Clearing current active slave\n");
915 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
916 bond_select_active_slave(bond);
917 } else {
918 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
919 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
920
921 BUG_ON(!new_active);
922
923 if (new_active == old_active) {
924 /* do nothing */
925 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
926 } else {
927 if (old_active && (new_active->link == BOND_LINK_UP) &&
928 bond_slave_is_up(new_active)) {
929 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
930 bond_change_active_slave(bond, new_active);
931 } else {
932 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
933 new_active->dev->name);
934 ret = -EINVAL;
935 }
936 }
937 }
938 unblock_netpoll_tx();
939
940 return ret;
941}
942
943/* There are two tricky bits here. First, if MII monitoring is activated, then
944 * we must disable ARP monitoring. Second, if the timer isn't running, we must
945 * start it.
946 */
947static int bond_option_miimon_set(struct bonding *bond,
948 const struct bond_opt_value *newval)
949{
950 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
951 newval->value);
952 bond->params.miimon = newval->value;
953 if (bond->params.updelay)
954 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
955 bond->params.updelay * bond->params.miimon);
956 if (bond->params.downdelay)
957 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
958 bond->params.downdelay * bond->params.miimon);
959 if (bond->params.peer_notif_delay)
960 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
961 bond->params.peer_notif_delay * bond->params.miimon);
962 if (newval->value && bond->params.arp_interval) {
963 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
964 bond->params.arp_interval = 0;
965 if (bond->params.arp_validate)
966 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
967 }
968 if (bond->dev->flags & IFF_UP) {
969 /* If the interface is up, we may need to fire off
970 * the MII timer. If the interface is down, the
971 * timer will get fired off when the open function
972 * is called.
973 */
974 if (!newval->value) {
975 cancel_delayed_work_sync(&bond->mii_work);
976 } else {
977 cancel_delayed_work_sync(&bond->arp_work);
978 queue_delayed_work(bond->wq, &bond->mii_work, 0);
979 }
980 }
981
982 return 0;
983}
984
985/* Set up, down and peer notification delays. These must be multiples
986 * of the MII monitoring value, and are stored internally as the
987 * multiplier. Thus, we must translate to MS for the real world.
988 */
989static int _bond_option_delay_set(struct bonding *bond,
990 const struct bond_opt_value *newval,
991 const char *name,
992 int *target)
993{
994 int value = newval->value;
995
996 if (!bond->params.miimon) {
997 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
998 name);
999 return -EPERM;
1000 }
1001 if ((value % bond->params.miimon) != 0) {
1002 netdev_warn(bond->dev,
1003 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1004 name,
1005 value, bond->params.miimon,
1006 (value / bond->params.miimon) *
1007 bond->params.miimon);
1008 }
1009 *target = value / bond->params.miimon;
1010 netdev_dbg(bond->dev, "Setting %s to %d\n",
1011 name,
1012 *target * bond->params.miimon);
1013
1014 return 0;
1015}
1016
1017static int bond_option_updelay_set(struct bonding *bond,
1018 const struct bond_opt_value *newval)
1019{
1020 return _bond_option_delay_set(bond, newval, "up delay",
1021 &bond->params.updelay);
1022}
1023
1024static int bond_option_downdelay_set(struct bonding *bond,
1025 const struct bond_opt_value *newval)
1026{
1027 return _bond_option_delay_set(bond, newval, "down delay",
1028 &bond->params.downdelay);
1029}
1030
1031static int bond_option_peer_notif_delay_set(struct bonding *bond,
1032 const struct bond_opt_value *newval)
1033{
1034 int ret = _bond_option_delay_set(bond, newval,
1035 "peer notification delay",
1036 &bond->params.peer_notif_delay);
1037 return ret;
1038}
1039
1040static int bond_option_use_carrier_set(struct bonding *bond,
1041 const struct bond_opt_value *newval)
1042{
1043 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1044 newval->value);
1045 bond->params.use_carrier = newval->value;
1046
1047 return 0;
1048}
1049
1050/* There are two tricky bits here. First, if ARP monitoring is activated, then
1051 * we must disable MII monitoring. Second, if the ARP timer isn't running,
1052 * we must start it.
1053 */
1054static int bond_option_arp_interval_set(struct bonding *bond,
1055 const struct bond_opt_value *newval)
1056{
1057 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1058 newval->value);
1059 bond->params.arp_interval = newval->value;
1060 if (newval->value) {
1061 if (bond->params.miimon) {
1062 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1063 bond->params.miimon = 0;
1064 }
1065 if (!bond->params.arp_targets[0])
1066 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1067 }
1068 if (bond->dev->flags & IFF_UP) {
1069 /* If the interface is up, we may need to fire off
1070 * the ARP timer. If the interface is down, the
1071 * timer will get fired off when the open function
1072 * is called.
1073 */
1074 if (!newval->value) {
1075 if (bond->params.arp_validate)
1076 bond->recv_probe = NULL;
1077 cancel_delayed_work_sync(&bond->arp_work);
1078 } else {
1079 /* arp_validate can be set only in active-backup mode */
1080 bond->recv_probe = bond_rcv_validate;
1081 cancel_delayed_work_sync(&bond->mii_work);
1082 queue_delayed_work(bond->wq, &bond->arp_work, 0);
1083 }
1084 }
1085
1086 return 0;
1087}
1088
1089static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1090 __be32 target,
1091 unsigned long last_rx)
1092{
1093 __be32 *targets = bond->params.arp_targets;
1094 struct list_head *iter;
1095 struct slave *slave;
1096
1097 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1098 bond_for_each_slave(bond, slave, iter)
1099 slave->target_last_arp_rx[slot] = last_rx;
1100 targets[slot] = target;
1101 }
1102}
1103
1104static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1105{
1106 __be32 *targets = bond->params.arp_targets;
1107 int ind;
1108
1109 if (!bond_is_ip_target_ok(target)) {
1110 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1111 &target);
1112 return -EINVAL;
1113 }
1114
1115 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1116 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1117 &target);
1118 return -EINVAL;
1119 }
1120
1121 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1122 if (ind == -1) {
1123 netdev_err(bond->dev, "ARP target table is full!\n");
1124 return -EINVAL;
1125 }
1126
1127 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1128
1129 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1130
1131 return 0;
1132}
1133
1134static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1135{
1136 return _bond_option_arp_ip_target_add(bond, target);
1137}
1138
1139static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1140{
1141 __be32 *targets = bond->params.arp_targets;
1142 struct list_head *iter;
1143 struct slave *slave;
1144 unsigned long *targets_rx;
1145 int ind, i;
1146
1147 if (!bond_is_ip_target_ok(target)) {
1148 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1149 &target);
1150 return -EINVAL;
1151 }
1152
1153 ind = bond_get_targets_ip(targets, target);
1154 if (ind == -1) {
1155 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1156 &target);
1157 return -EINVAL;
1158 }
1159
1160 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1161 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1162
1163 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1164
1165 bond_for_each_slave(bond, slave, iter) {
1166 targets_rx = slave->target_last_arp_rx;
1167 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1168 targets_rx[i] = targets_rx[i+1];
1169 targets_rx[i] = 0;
1170 }
1171 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1172 targets[i] = targets[i+1];
1173 targets[i] = 0;
1174
1175 return 0;
1176}
1177
1178void bond_option_arp_ip_targets_clear(struct bonding *bond)
1179{
1180 int i;
1181
1182 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1183 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1184}
1185
1186static int bond_option_arp_ip_targets_set(struct bonding *bond,
1187 const struct bond_opt_value *newval)
1188{
1189 int ret = -EPERM;
1190 __be32 target;
1191
1192 if (newval->string) {
1193 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1194 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1195 &target);
1196 return ret;
1197 }
1198 if (newval->string[0] == '+')
1199 ret = bond_option_arp_ip_target_add(bond, target);
1200 else if (newval->string[0] == '-')
1201 ret = bond_option_arp_ip_target_rem(bond, target);
1202 else
1203 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1204 } else {
1205 target = newval->value;
1206 ret = bond_option_arp_ip_target_add(bond, target);
1207 }
1208
1209 return ret;
1210}
1211
1212#if IS_ENABLED(CONFIG_IPV6)
1213static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1214 struct in6_addr *target,
1215 unsigned long last_rx)
1216{
1217 struct in6_addr *targets = bond->params.ns_targets;
1218 struct list_head *iter;
1219 struct slave *slave;
1220
1221 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1222 bond_for_each_slave(bond, slave, iter)
1223 slave->target_last_arp_rx[slot] = last_rx;
1224 targets[slot] = *target;
1225 }
1226}
1227
1228void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1229{
1230 struct in6_addr addr_any = in6addr_any;
1231 int i;
1232
1233 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1234 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1235}
1236
1237static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1238 const struct bond_opt_value *newval)
1239{
1240 struct in6_addr *target = (struct in6_addr *)newval->extra;
1241 struct in6_addr *targets = bond->params.ns_targets;
1242 struct in6_addr addr_any = in6addr_any;
1243 int index;
1244
1245 if (!bond_is_ip6_target_ok(target)) {
1246 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1247 target);
1248 return -EINVAL;
1249 }
1250
1251 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1252 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1253 target);
1254 return -EINVAL;
1255 }
1256
1257 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1258 if (index == -1) {
1259 netdev_err(bond->dev, "NS target table is full!\n");
1260 return -EINVAL;
1261 }
1262
1263 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1264
1265 _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1266
1267 return 0;
1268}
1269#else
1270static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1271 const struct bond_opt_value *newval)
1272{
1273 return -EPERM;
1274}
1275#endif
1276
1277static int bond_option_arp_validate_set(struct bonding *bond,
1278 const struct bond_opt_value *newval)
1279{
1280 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1281 newval->string, newval->value);
1282 bond->params.arp_validate = newval->value;
1283
1284 return 0;
1285}
1286
1287static int bond_option_arp_all_targets_set(struct bonding *bond,
1288 const struct bond_opt_value *newval)
1289{
1290 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1291 newval->string, newval->value);
1292 bond->params.arp_all_targets = newval->value;
1293
1294 return 0;
1295}
1296
1297static int bond_option_missed_max_set(struct bonding *bond,
1298 const struct bond_opt_value *newval)
1299{
1300 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1301 newval->string, newval->value);
1302 bond->params.missed_max = newval->value;
1303
1304 return 0;
1305}
1306
1307static int bond_option_prio_set(struct bonding *bond,
1308 const struct bond_opt_value *newval)
1309{
1310 struct slave *slave;
1311
1312 slave = bond_slave_get_rtnl(newval->slave_dev);
1313 if (!slave) {
1314 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1315 return -ENODEV;
1316 }
1317 slave->prio = newval->value;
1318
1319 if (rtnl_dereference(bond->primary_slave))
1320 slave_warn(bond->dev, slave->dev,
1321 "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1322 else
1323 bond_select_active_slave(bond);
1324
1325 return 0;
1326}
1327
1328static int bond_option_primary_set(struct bonding *bond,
1329 const struct bond_opt_value *newval)
1330{
1331 char *p, *primary = newval->string;
1332 struct list_head *iter;
1333 struct slave *slave;
1334
1335 block_netpoll_tx();
1336
1337 p = strchr(primary, '\n');
1338 if (p)
1339 *p = '\0';
1340 /* check to see if we are clearing primary */
1341 if (!strlen(primary)) {
1342 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1343 RCU_INIT_POINTER(bond->primary_slave, NULL);
1344 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1345 bond_select_active_slave(bond);
1346 goto out;
1347 }
1348
1349 bond_for_each_slave(bond, slave, iter) {
1350 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1351 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1352 rcu_assign_pointer(bond->primary_slave, slave);
1353 strcpy(bond->params.primary, slave->dev->name);
1354 bond->force_primary = true;
1355 bond_select_active_slave(bond);
1356 goto out;
1357 }
1358 }
1359
1360 if (rtnl_dereference(bond->primary_slave)) {
1361 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1362 RCU_INIT_POINTER(bond->primary_slave, NULL);
1363 bond_select_active_slave(bond);
1364 }
1365 strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1366
1367 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1368 primary);
1369
1370out:
1371 unblock_netpoll_tx();
1372
1373 return 0;
1374}
1375
1376static int bond_option_primary_reselect_set(struct bonding *bond,
1377 const struct bond_opt_value *newval)
1378{
1379 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1380 newval->string, newval->value);
1381 bond->params.primary_reselect = newval->value;
1382
1383 block_netpoll_tx();
1384 bond_select_active_slave(bond);
1385 unblock_netpoll_tx();
1386
1387 return 0;
1388}
1389
1390static int bond_option_fail_over_mac_set(struct bonding *bond,
1391 const struct bond_opt_value *newval)
1392{
1393 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1394 newval->string, newval->value);
1395 bond->params.fail_over_mac = newval->value;
1396
1397 return 0;
1398}
1399
1400static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1401 const struct bond_opt_value *newval)
1402{
1403 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1404 newval->string, newval->value);
1405 bond->params.xmit_policy = newval->value;
1406
1407 return 0;
1408}
1409
1410static int bond_option_resend_igmp_set(struct bonding *bond,
1411 const struct bond_opt_value *newval)
1412{
1413 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1414 newval->value);
1415 bond->params.resend_igmp = newval->value;
1416
1417 return 0;
1418}
1419
1420static int bond_option_num_peer_notif_set(struct bonding *bond,
1421 const struct bond_opt_value *newval)
1422{
1423 bond->params.num_peer_notif = newval->value;
1424
1425 return 0;
1426}
1427
1428static int bond_option_all_slaves_active_set(struct bonding *bond,
1429 const struct bond_opt_value *newval)
1430{
1431 struct list_head *iter;
1432 struct slave *slave;
1433
1434 if (newval->value == bond->params.all_slaves_active)
1435 return 0;
1436 bond->params.all_slaves_active = newval->value;
1437 bond_for_each_slave(bond, slave, iter) {
1438 if (!bond_is_active_slave(slave)) {
1439 if (newval->value)
1440 slave->inactive = 0;
1441 else
1442 slave->inactive = 1;
1443 }
1444 }
1445
1446 return 0;
1447}
1448
1449static int bond_option_min_links_set(struct bonding *bond,
1450 const struct bond_opt_value *newval)
1451{
1452 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1453 newval->value);
1454 bond->params.min_links = newval->value;
1455 bond_set_carrier(bond);
1456
1457 return 0;
1458}
1459
1460static int bond_option_lp_interval_set(struct bonding *bond,
1461 const struct bond_opt_value *newval)
1462{
1463 bond->params.lp_interval = newval->value;
1464
1465 return 0;
1466}
1467
1468static int bond_option_pps_set(struct bonding *bond,
1469 const struct bond_opt_value *newval)
1470{
1471 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1472 newval->value);
1473 bond->params.packets_per_slave = newval->value;
1474 if (newval->value > 0) {
1475 bond->params.reciprocal_packets_per_slave =
1476 reciprocal_value(newval->value);
1477 } else {
1478 /* reciprocal_packets_per_slave is unused if
1479 * packets_per_slave is 0 or 1, just initialize it
1480 */
1481 bond->params.reciprocal_packets_per_slave =
1482 (struct reciprocal_value) { 0 };
1483 }
1484
1485 return 0;
1486}
1487
1488static int bond_option_lacp_active_set(struct bonding *bond,
1489 const struct bond_opt_value *newval)
1490{
1491 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1492 newval->string, newval->value);
1493 bond->params.lacp_active = newval->value;
1494
1495 return 0;
1496}
1497
1498static int bond_option_lacp_rate_set(struct bonding *bond,
1499 const struct bond_opt_value *newval)
1500{
1501 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1502 newval->string, newval->value);
1503 bond->params.lacp_fast = newval->value;
1504 bond_3ad_update_lacp_rate(bond);
1505
1506 return 0;
1507}
1508
1509static int bond_option_ad_select_set(struct bonding *bond,
1510 const struct bond_opt_value *newval)
1511{
1512 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1513 newval->string, newval->value);
1514 bond->params.ad_select = newval->value;
1515
1516 return 0;
1517}
1518
1519static int bond_option_queue_id_set(struct bonding *bond,
1520 const struct bond_opt_value *newval)
1521{
1522 struct slave *slave, *update_slave;
1523 struct net_device *sdev;
1524 struct list_head *iter;
1525 char *delim;
1526 int ret = 0;
1527 u16 qid;
1528
1529 /* delim will point to queue id if successful */
1530 delim = strchr(newval->string, ':');
1531 if (!delim)
1532 goto err_no_cmd;
1533
1534 /* Terminate string that points to device name and bump it
1535 * up one, so we can read the queue id there.
1536 */
1537 *delim = '\0';
1538 if (sscanf(++delim, "%hd\n", &qid) != 1)
1539 goto err_no_cmd;
1540
1541 /* Check buffer length, valid ifname and queue id */
1542 if (!dev_valid_name(newval->string) ||
1543 qid > bond->dev->real_num_tx_queues)
1544 goto err_no_cmd;
1545
1546 /* Get the pointer to that interface if it exists */
1547 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1548 if (!sdev)
1549 goto err_no_cmd;
1550
1551 /* Search for thes slave and check for duplicate qids */
1552 update_slave = NULL;
1553 bond_for_each_slave(bond, slave, iter) {
1554 if (sdev == slave->dev)
1555 /* We don't need to check the matching
1556 * slave for dups, since we're overwriting it
1557 */
1558 update_slave = slave;
1559 else if (qid && qid == slave->queue_id) {
1560 goto err_no_cmd;
1561 }
1562 }
1563
1564 if (!update_slave)
1565 goto err_no_cmd;
1566
1567 /* Actually set the qids for the slave */
1568 update_slave->queue_id = qid;
1569
1570out:
1571 return ret;
1572
1573err_no_cmd:
1574 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1575 ret = -EPERM;
1576 goto out;
1577
1578}
1579
1580static int bond_option_slaves_set(struct bonding *bond,
1581 const struct bond_opt_value *newval)
1582{
1583 char command[IFNAMSIZ + 1] = { 0, };
1584 struct net_device *dev;
1585 char *ifname;
1586 int ret;
1587
1588 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1589 ifname = command + 1;
1590 if ((strlen(command) <= 1) ||
1591 (command[0] != '+' && command[0] != '-') ||
1592 !dev_valid_name(ifname))
1593 goto err_no_cmd;
1594
1595 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1596 if (!dev) {
1597 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1598 ifname);
1599 ret = -ENODEV;
1600 goto out;
1601 }
1602
1603 switch (command[0]) {
1604 case '+':
1605 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1606 ret = bond_enslave(bond->dev, dev, NULL);
1607 break;
1608
1609 case '-':
1610 slave_dbg(bond->dev, dev, "Releasing interface\n");
1611 ret = bond_release(bond->dev, dev);
1612 break;
1613
1614 default:
1615 /* should not run here. */
1616 goto err_no_cmd;
1617 }
1618
1619out:
1620 return ret;
1621
1622err_no_cmd:
1623 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1624 ret = -EPERM;
1625 goto out;
1626}
1627
1628static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1629 const struct bond_opt_value *newval)
1630{
1631 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1632 newval->string, newval->value);
1633 bond->params.tlb_dynamic_lb = newval->value;
1634
1635 return 0;
1636}
1637
1638static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1639 const struct bond_opt_value *newval)
1640{
1641 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1642 newval->value);
1643
1644 bond->params.ad_actor_sys_prio = newval->value;
1645 bond_3ad_update_ad_actor_settings(bond);
1646
1647 return 0;
1648}
1649
1650static int bond_option_ad_actor_system_set(struct bonding *bond,
1651 const struct bond_opt_value *newval)
1652{
1653 u8 macaddr[ETH_ALEN];
1654 u8 *mac;
1655
1656 if (newval->string) {
1657 if (!mac_pton(newval->string, macaddr))
1658 goto err;
1659 mac = macaddr;
1660 } else {
1661 mac = (u8 *)&newval->value;
1662 }
1663
1664 if (is_multicast_ether_addr(mac))
1665 goto err;
1666
1667 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1668 ether_addr_copy(bond->params.ad_actor_system, mac);
1669 bond_3ad_update_ad_actor_settings(bond);
1670
1671 return 0;
1672
1673err:
1674 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1675 return -EINVAL;
1676}
1677
1678static int bond_option_ad_user_port_key_set(struct bonding *bond,
1679 const struct bond_opt_value *newval)
1680{
1681 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1682 newval->value);
1683
1684 bond->params.ad_user_port_key = newval->value;
1685 return 0;
1686}