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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_peer_notif_delay_tbl[] = {
173 { "off", 0, 0},
174 { "maxval", 300000, BOND_VALFLAG_MAX},
175 { NULL, -1, 0}
176};
177
178static const struct bond_opt_value bond_primary_reselect_tbl[] = {
179 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
180 { "better", BOND_PRI_RESELECT_BETTER, 0},
181 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
182 { NULL, -1},
183};
184
185static const struct bond_opt_value bond_use_carrier_tbl[] = {
186 { "off", 0, 0},
187 { "on", 1, BOND_VALFLAG_DEFAULT},
188 { NULL, -1, 0}
189};
190
191static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
192 { "off", 0, BOND_VALFLAG_DEFAULT},
193 { "on", 1, 0},
194 { NULL, -1, 0}
195};
196
197static const struct bond_opt_value bond_resend_igmp_tbl[] = {
198 { "off", 0, 0},
199 { "maxval", 255, BOND_VALFLAG_MAX},
200 { "default", 1, BOND_VALFLAG_DEFAULT},
201 { NULL, -1, 0}
202};
203
204static const struct bond_opt_value bond_lp_interval_tbl[] = {
205 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
206 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
207 { NULL, -1, 0},
208};
209
210static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
211 { "off", 0, 0},
212 { "on", 1, BOND_VALFLAG_DEFAULT},
213 { NULL, -1, 0}
214};
215
216static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
217 { "minval", 1, BOND_VALFLAG_MIN},
218 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
219 { NULL, -1, 0},
220};
221
222static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
223 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
224 { "maxval", 1023, BOND_VALFLAG_MAX},
225 { NULL, -1, 0},
226};
227
228static const struct bond_opt_value bond_missed_max_tbl[] = {
229 { "minval", 1, BOND_VALFLAG_MIN},
230 { "maxval", 255, BOND_VALFLAG_MAX},
231 { "default", 2, BOND_VALFLAG_DEFAULT},
232 { NULL, -1, 0},
233};
234
235static const struct bond_option bond_opts[BOND_OPT_LAST] = {
236 [BOND_OPT_MODE] = {
237 .id = BOND_OPT_MODE,
238 .name = "mode",
239 .desc = "bond device mode",
240 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
241 .values = bond_mode_tbl,
242 .set = bond_option_mode_set
243 },
244 [BOND_OPT_PACKETS_PER_SLAVE] = {
245 .id = BOND_OPT_PACKETS_PER_SLAVE,
246 .name = "packets_per_slave",
247 .desc = "Packets to send per slave in RR mode",
248 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
249 .values = bond_pps_tbl,
250 .set = bond_option_pps_set
251 },
252 [BOND_OPT_XMIT_HASH] = {
253 .id = BOND_OPT_XMIT_HASH,
254 .name = "xmit_hash_policy",
255 .desc = "balance-xor, 802.3ad, and tlb hashing method",
256 .values = bond_xmit_hashtype_tbl,
257 .set = bond_option_xmit_hash_policy_set
258 },
259 [BOND_OPT_ARP_VALIDATE] = {
260 .id = BOND_OPT_ARP_VALIDATE,
261 .name = "arp_validate",
262 .desc = "validate src/dst of ARP probes",
263 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
264 BIT(BOND_MODE_ALB),
265 .values = bond_arp_validate_tbl,
266 .set = bond_option_arp_validate_set
267 },
268 [BOND_OPT_ARP_ALL_TARGETS] = {
269 .id = BOND_OPT_ARP_ALL_TARGETS,
270 .name = "arp_all_targets",
271 .desc = "fail on any/all arp targets timeout",
272 .values = bond_arp_all_targets_tbl,
273 .set = bond_option_arp_all_targets_set
274 },
275 [BOND_OPT_FAIL_OVER_MAC] = {
276 .id = BOND_OPT_FAIL_OVER_MAC,
277 .name = "fail_over_mac",
278 .desc = "For active-backup, do not set all slaves to the same MAC",
279 .flags = BOND_OPTFLAG_NOSLAVES,
280 .values = bond_fail_over_mac_tbl,
281 .set = bond_option_fail_over_mac_set
282 },
283 [BOND_OPT_ARP_INTERVAL] = {
284 .id = BOND_OPT_ARP_INTERVAL,
285 .name = "arp_interval",
286 .desc = "arp interval in milliseconds",
287 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
288 BIT(BOND_MODE_ALB),
289 .values = bond_intmax_tbl,
290 .set = bond_option_arp_interval_set
291 },
292 [BOND_OPT_MISSED_MAX] = {
293 .id = BOND_OPT_MISSED_MAX,
294 .name = "arp_missed_max",
295 .desc = "Maximum number of missed ARP interval",
296 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
297 BIT(BOND_MODE_ALB),
298 .values = bond_missed_max_tbl,
299 .set = bond_option_missed_max_set
300 },
301 [BOND_OPT_ARP_TARGETS] = {
302 .id = BOND_OPT_ARP_TARGETS,
303 .name = "arp_ip_target",
304 .desc = "arp targets in n.n.n.n form",
305 .flags = BOND_OPTFLAG_RAWVAL,
306 .set = bond_option_arp_ip_targets_set
307 },
308 [BOND_OPT_NS_TARGETS] = {
309 .id = BOND_OPT_NS_TARGETS,
310 .name = "ns_ip6_target",
311 .desc = "NS targets in ffff:ffff::ffff:ffff form",
312 .flags = BOND_OPTFLAG_RAWVAL,
313 .set = bond_option_ns_ip6_targets_set
314 },
315 [BOND_OPT_DOWNDELAY] = {
316 .id = BOND_OPT_DOWNDELAY,
317 .name = "downdelay",
318 .desc = "Delay before considering link down, in milliseconds",
319 .values = bond_intmax_tbl,
320 .set = bond_option_downdelay_set
321 },
322 [BOND_OPT_UPDELAY] = {
323 .id = BOND_OPT_UPDELAY,
324 .name = "updelay",
325 .desc = "Delay before considering link up, in milliseconds",
326 .values = bond_intmax_tbl,
327 .set = bond_option_updelay_set
328 },
329 [BOND_OPT_LACP_ACTIVE] = {
330 .id = BOND_OPT_LACP_ACTIVE,
331 .name = "lacp_active",
332 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
333 .flags = BOND_OPTFLAG_IFDOWN,
334 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
335 .values = bond_lacp_active,
336 .set = bond_option_lacp_active_set
337 },
338 [BOND_OPT_LACP_RATE] = {
339 .id = BOND_OPT_LACP_RATE,
340 .name = "lacp_rate",
341 .desc = "LACPDU tx rate to request from 802.3ad partner",
342 .flags = BOND_OPTFLAG_IFDOWN,
343 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
344 .values = bond_lacp_rate_tbl,
345 .set = bond_option_lacp_rate_set
346 },
347 [BOND_OPT_MINLINKS] = {
348 .id = BOND_OPT_MINLINKS,
349 .name = "min_links",
350 .desc = "Minimum number of available links before turning on carrier",
351 .values = bond_intmax_tbl,
352 .set = bond_option_min_links_set
353 },
354 [BOND_OPT_AD_SELECT] = {
355 .id = BOND_OPT_AD_SELECT,
356 .name = "ad_select",
357 .desc = "803.ad aggregation selection logic",
358 .flags = BOND_OPTFLAG_IFDOWN,
359 .values = bond_ad_select_tbl,
360 .set = bond_option_ad_select_set
361 },
362 [BOND_OPT_NUM_PEER_NOTIF] = {
363 .id = BOND_OPT_NUM_PEER_NOTIF,
364 .name = "num_unsol_na",
365 .desc = "Number of peer notifications to send on failover event",
366 .values = bond_num_peer_notif_tbl,
367 .set = bond_option_num_peer_notif_set
368 },
369 [BOND_OPT_MIIMON] = {
370 .id = BOND_OPT_MIIMON,
371 .name = "miimon",
372 .desc = "Link check interval in milliseconds",
373 .values = bond_intmax_tbl,
374 .set = bond_option_miimon_set
375 },
376 [BOND_OPT_PRIO] = {
377 .id = BOND_OPT_PRIO,
378 .name = "prio",
379 .desc = "Link priority for failover re-selection",
380 .flags = BOND_OPTFLAG_RAWVAL,
381 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
382 BIT(BOND_MODE_TLB) |
383 BIT(BOND_MODE_ALB)),
384 .set = bond_option_prio_set
385 },
386 [BOND_OPT_PRIMARY] = {
387 .id = BOND_OPT_PRIMARY,
388 .name = "primary",
389 .desc = "Primary network device to use",
390 .flags = BOND_OPTFLAG_RAWVAL,
391 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
392 BIT(BOND_MODE_TLB) |
393 BIT(BOND_MODE_ALB)),
394 .set = bond_option_primary_set
395 },
396 [BOND_OPT_PRIMARY_RESELECT] = {
397 .id = BOND_OPT_PRIMARY_RESELECT,
398 .name = "primary_reselect",
399 .desc = "Reselect primary slave once it comes up",
400 .values = bond_primary_reselect_tbl,
401 .set = bond_option_primary_reselect_set
402 },
403 [BOND_OPT_USE_CARRIER] = {
404 .id = BOND_OPT_USE_CARRIER,
405 .name = "use_carrier",
406 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
407 .values = bond_use_carrier_tbl,
408 .set = bond_option_use_carrier_set
409 },
410 [BOND_OPT_ACTIVE_SLAVE] = {
411 .id = BOND_OPT_ACTIVE_SLAVE,
412 .name = "active_slave",
413 .desc = "Currently active slave",
414 .flags = BOND_OPTFLAG_RAWVAL,
415 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
416 BIT(BOND_MODE_TLB) |
417 BIT(BOND_MODE_ALB)),
418 .set = bond_option_active_slave_set
419 },
420 [BOND_OPT_QUEUE_ID] = {
421 .id = BOND_OPT_QUEUE_ID,
422 .name = "queue_id",
423 .desc = "Set queue id of a slave",
424 .flags = BOND_OPTFLAG_RAWVAL,
425 .set = bond_option_queue_id_set
426 },
427 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
428 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
429 .name = "all_slaves_active",
430 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
431 .values = bond_all_slaves_active_tbl,
432 .set = bond_option_all_slaves_active_set
433 },
434 [BOND_OPT_RESEND_IGMP] = {
435 .id = BOND_OPT_RESEND_IGMP,
436 .name = "resend_igmp",
437 .desc = "Number of IGMP membership reports to send on link failure",
438 .values = bond_resend_igmp_tbl,
439 .set = bond_option_resend_igmp_set
440 },
441 [BOND_OPT_LP_INTERVAL] = {
442 .id = BOND_OPT_LP_INTERVAL,
443 .name = "lp_interval",
444 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
445 .values = bond_lp_interval_tbl,
446 .set = bond_option_lp_interval_set
447 },
448 [BOND_OPT_SLAVES] = {
449 .id = BOND_OPT_SLAVES,
450 .name = "slaves",
451 .desc = "Slave membership management",
452 .flags = BOND_OPTFLAG_RAWVAL,
453 .set = bond_option_slaves_set
454 },
455 [BOND_OPT_TLB_DYNAMIC_LB] = {
456 .id = BOND_OPT_TLB_DYNAMIC_LB,
457 .name = "tlb_dynamic_lb",
458 .desc = "Enable dynamic flow shuffling",
459 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
460 .values = bond_tlb_dynamic_lb_tbl,
461 .flags = BOND_OPTFLAG_IFDOWN,
462 .set = bond_option_tlb_dynamic_lb_set,
463 },
464 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
465 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
466 .name = "ad_actor_sys_prio",
467 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
468 .values = bond_ad_actor_sys_prio_tbl,
469 .set = bond_option_ad_actor_sys_prio_set,
470 },
471 [BOND_OPT_AD_ACTOR_SYSTEM] = {
472 .id = BOND_OPT_AD_ACTOR_SYSTEM,
473 .name = "ad_actor_system",
474 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
475 .flags = BOND_OPTFLAG_RAWVAL,
476 .set = bond_option_ad_actor_system_set,
477 },
478 [BOND_OPT_AD_USER_PORT_KEY] = {
479 .id = BOND_OPT_AD_USER_PORT_KEY,
480 .name = "ad_user_port_key",
481 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
482 .flags = BOND_OPTFLAG_IFDOWN,
483 .values = bond_ad_user_port_key_tbl,
484 .set = bond_option_ad_user_port_key_set,
485 },
486 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
487 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
488 .name = "num_grat_arp",
489 .desc = "Number of peer notifications to send on failover event",
490 .values = bond_num_peer_notif_tbl,
491 .set = bond_option_num_peer_notif_set
492 },
493 [BOND_OPT_PEER_NOTIF_DELAY] = {
494 .id = BOND_OPT_PEER_NOTIF_DELAY,
495 .name = "peer_notif_delay",
496 .desc = "Delay between each peer notification on failover event, in milliseconds",
497 .values = bond_peer_notif_delay_tbl,
498 .set = bond_option_peer_notif_delay_set
499 }
500};
501
502/* Searches for an option by name */
503const struct bond_option *bond_opt_get_by_name(const char *name)
504{
505 const struct bond_option *opt;
506 int option;
507
508 for (option = 0; option < BOND_OPT_LAST; option++) {
509 opt = bond_opt_get(option);
510 if (opt && !strcmp(opt->name, name))
511 return opt;
512 }
513
514 return NULL;
515}
516
517/* Searches for a value in opt's values[] table */
518const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
519{
520 const struct bond_option *opt;
521 int i;
522
523 opt = bond_opt_get(option);
524 if (WARN_ON(!opt))
525 return NULL;
526 for (i = 0; opt->values && opt->values[i].string; i++)
527 if (opt->values[i].value == val)
528 return &opt->values[i];
529
530 return NULL;
531}
532
533/* Searches for a value in opt's values[] table which matches the flagmask */
534static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
535 u32 flagmask)
536{
537 int i;
538
539 for (i = 0; opt->values && opt->values[i].string; i++)
540 if (opt->values[i].flags & flagmask)
541 return &opt->values[i];
542
543 return NULL;
544}
545
546/* If maxval is missing then there's no range to check. In case minval is
547 * missing then it's considered to be 0.
548 */
549static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
550{
551 const struct bond_opt_value *minval, *maxval;
552
553 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
554 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
555 if (!maxval || (minval && val < minval->value) || val > maxval->value)
556 return false;
557
558 return true;
559}
560
561/**
562 * bond_opt_parse - parse option value
563 * @opt: the option to parse against
564 * @val: value to parse
565 *
566 * This function tries to extract the value from @val and check if it's
567 * a possible match for the option and returns NULL if a match isn't found,
568 * or the struct_opt_value that matched. It also strips the new line from
569 * @val->string if it's present.
570 */
571const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
572 struct bond_opt_value *val)
573{
574 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
575 const struct bond_opt_value *tbl;
576 const struct bond_opt_value *ret = NULL;
577 bool checkval;
578 int i, rv;
579
580 /* No parsing if the option wants a raw val */
581 if (opt->flags & BOND_OPTFLAG_RAWVAL)
582 return val;
583
584 tbl = opt->values;
585 if (!tbl)
586 goto out;
587
588 /* ULLONG_MAX is used to bypass string processing */
589 checkval = val->value != ULLONG_MAX;
590 if (!checkval) {
591 if (!val->string)
592 goto out;
593 p = strchr(val->string, '\n');
594 if (p)
595 *p = '\0';
596 for (p = val->string; *p; p++)
597 if (!(isdigit(*p) || isspace(*p)))
598 break;
599 /* The following code extracts the string to match or the value
600 * and sets checkval appropriately
601 */
602 if (*p) {
603 rv = sscanf(val->string, "%32s", valstr);
604 } else {
605 rv = sscanf(val->string, "%llu", &val->value);
606 checkval = true;
607 }
608 if (!rv)
609 goto out;
610 }
611
612 for (i = 0; tbl[i].string; i++) {
613 /* Check for exact match */
614 if (checkval) {
615 if (val->value == tbl[i].value)
616 ret = &tbl[i];
617 } else {
618 if (!strcmp(valstr, "default") &&
619 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
620 ret = &tbl[i];
621
622 if (!strcmp(valstr, tbl[i].string))
623 ret = &tbl[i];
624 }
625 /* Found an exact match */
626 if (ret)
627 goto out;
628 }
629 /* Possible range match */
630 if (checkval && bond_opt_check_range(opt, val->value))
631 ret = val;
632out:
633 return ret;
634}
635
636/* Check opt's dependencies against bond mode and currently set options */
637static int bond_opt_check_deps(struct bonding *bond,
638 const struct bond_option *opt)
639{
640 struct bond_params *params = &bond->params;
641
642 if (test_bit(params->mode, &opt->unsuppmodes))
643 return -EACCES;
644 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
645 return -ENOTEMPTY;
646 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
647 return -EBUSY;
648
649 return 0;
650}
651
652static void bond_opt_dep_print(struct bonding *bond,
653 const struct bond_option *opt,
654 struct nlattr *bad_attr,
655 struct netlink_ext_ack *extack)
656{
657 const struct bond_opt_value *modeval;
658 struct bond_params *params;
659
660 params = &bond->params;
661 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
662 if (test_bit(params->mode, &opt->unsuppmodes)) {
663 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
664 opt->name, modeval->string, modeval->value);
665 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
666 "option not supported in mode");
667 }
668}
669
670static void bond_opt_error_interpret(struct bonding *bond,
671 const struct bond_option *opt,
672 int error, const struct bond_opt_value *val,
673 struct nlattr *bad_attr,
674 struct netlink_ext_ack *extack)
675{
676 const struct bond_opt_value *minval, *maxval;
677 char *p;
678
679 switch (error) {
680 case -EINVAL:
681 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
682 if (val) {
683 if (val->string) {
684 /* sometimes RAWVAL opts may have new lines */
685 p = strchr(val->string, '\n');
686 if (p)
687 *p = '\0';
688 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
689 opt->name, val->string);
690 } else {
691 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
692 opt->name, val->value);
693 }
694 }
695 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
696 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
697 if (!maxval)
698 break;
699 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
700 opt->name, minval ? minval->value : 0, maxval->value);
701 break;
702 case -EACCES:
703 bond_opt_dep_print(bond, opt, bad_attr, extack);
704 break;
705 case -ENOTEMPTY:
706 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
707 "unable to set option because the bond device has slaves");
708 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
709 opt->name);
710 break;
711 case -EBUSY:
712 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
713 "unable to set option because the bond is up");
714 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
715 opt->name);
716 break;
717 case -ENODEV:
718 if (val && val->string) {
719 p = strchr(val->string, '\n');
720 if (p)
721 *p = '\0';
722 netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
723 opt->name, val->string);
724 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
725 "interface does not exist");
726 }
727 break;
728 default:
729 break;
730 }
731}
732
733/**
734 * __bond_opt_set - set a bonding option
735 * @bond: target bond device
736 * @option: option to set
737 * @val: value to set it to
738 * @bad_attr: netlink attribue that caused the error
739 * @extack: extended netlink error structure, used when an error message
740 * needs to be returned to the caller via netlink
741 *
742 * This function is used to change the bond's option value, it can be
743 * used for both enabling/changing an option and for disabling it. RTNL lock
744 * must be obtained before calling this function.
745 */
746int __bond_opt_set(struct bonding *bond,
747 unsigned int option, struct bond_opt_value *val,
748 struct nlattr *bad_attr, struct netlink_ext_ack *extack)
749{
750 const struct bond_opt_value *retval = NULL;
751 const struct bond_option *opt;
752 int ret = -ENOENT;
753
754 ASSERT_RTNL();
755
756 opt = bond_opt_get(option);
757 if (WARN_ON(!val) || WARN_ON(!opt))
758 goto out;
759 ret = bond_opt_check_deps(bond, opt);
760 if (ret)
761 goto out;
762 retval = bond_opt_parse(opt, val);
763 if (!retval) {
764 ret = -EINVAL;
765 goto out;
766 }
767 ret = opt->set(bond, retval);
768out:
769 if (ret)
770 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
771
772 return ret;
773}
774/**
775 * __bond_opt_set_notify - set a bonding option
776 * @bond: target bond device
777 * @option: option to set
778 * @val: value to set it to
779 *
780 * This function is used to change the bond's option value and trigger
781 * a notification to user sapce. It can be used for both enabling/changing
782 * an option and for disabling it. RTNL lock must be obtained before calling
783 * this function.
784 */
785int __bond_opt_set_notify(struct bonding *bond,
786 unsigned int option, struct bond_opt_value *val)
787{
788 int ret;
789
790 ASSERT_RTNL();
791
792 ret = __bond_opt_set(bond, option, val, NULL, NULL);
793
794 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
795 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
796
797 return ret;
798}
799
800/**
801 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
802 * @bond: target bond device
803 * @option: option to set
804 * @buf: value to set it to
805 *
806 * This function tries to acquire RTNL without blocking and if successful
807 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
808 */
809int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
810{
811 struct bond_opt_value optval;
812 int ret;
813
814 if (!rtnl_trylock())
815 return restart_syscall();
816 bond_opt_initstr(&optval, buf);
817 ret = __bond_opt_set_notify(bond, option, &optval);
818 rtnl_unlock();
819
820 return ret;
821}
822
823/**
824 * bond_opt_get - get a pointer to an option
825 * @option: option for which to return a pointer
826 *
827 * This function checks if option is valid and if so returns a pointer
828 * to its entry in the bond_opts[] option array.
829 */
830const struct bond_option *bond_opt_get(unsigned int option)
831{
832 if (!BOND_OPT_VALID(option))
833 return NULL;
834
835 return &bond_opts[option];
836}
837
838static bool bond_set_xfrm_features(struct bonding *bond)
839{
840 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
841 return false;
842
843 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
844 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
845 else
846 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
847
848 return true;
849}
850
851static int bond_option_mode_set(struct bonding *bond,
852 const struct bond_opt_value *newval)
853{
854 if (!bond_mode_uses_arp(newval->value)) {
855 if (bond->params.arp_interval) {
856 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
857 newval->string);
858 /* disable arp monitoring */
859 bond->params.arp_interval = 0;
860 }
861
862 if (!bond->params.miimon) {
863 /* set miimon to default value */
864 bond->params.miimon = BOND_DEFAULT_MIIMON;
865 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
866 bond->params.miimon);
867 }
868 }
869
870 if (newval->value == BOND_MODE_ALB)
871 bond->params.tlb_dynamic_lb = 1;
872
873 /* don't cache arp_validate between modes */
874 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
875 bond->params.mode = newval->value;
876
877 if (bond->dev->reg_state == NETREG_REGISTERED) {
878 bool update = false;
879
880 update |= bond_set_xfrm_features(bond);
881
882 if (update)
883 netdev_update_features(bond->dev);
884 }
885
886 bond_xdp_set_features(bond->dev);
887
888 return 0;
889}
890
891static int bond_option_active_slave_set(struct bonding *bond,
892 const struct bond_opt_value *newval)
893{
894 char ifname[IFNAMSIZ] = { 0, };
895 struct net_device *slave_dev;
896 int ret = 0;
897
898 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
899 if (!strlen(ifname) || newval->string[0] == '\n') {
900 slave_dev = NULL;
901 } else {
902 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
903 if (!slave_dev)
904 return -ENODEV;
905 }
906
907 if (slave_dev) {
908 if (!netif_is_bond_slave(slave_dev)) {
909 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
910 return -EINVAL;
911 }
912
913 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
914 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
915 return -EINVAL;
916 }
917 }
918
919 block_netpoll_tx();
920 /* check to see if we are clearing active */
921 if (!slave_dev) {
922 netdev_dbg(bond->dev, "Clearing current active slave\n");
923 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
924 bond_select_active_slave(bond);
925 } else {
926 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
927 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
928
929 BUG_ON(!new_active);
930
931 if (new_active == old_active) {
932 /* do nothing */
933 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
934 } else {
935 if (old_active && (new_active->link == BOND_LINK_UP) &&
936 bond_slave_is_up(new_active)) {
937 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
938 bond_change_active_slave(bond, new_active);
939 } else {
940 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
941 new_active->dev->name);
942 ret = -EINVAL;
943 }
944 }
945 }
946 unblock_netpoll_tx();
947
948 return ret;
949}
950
951/* There are two tricky bits here. First, if MII monitoring is activated, then
952 * we must disable ARP monitoring. Second, if the timer isn't running, we must
953 * start it.
954 */
955static int bond_option_miimon_set(struct bonding *bond,
956 const struct bond_opt_value *newval)
957{
958 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
959 newval->value);
960 bond->params.miimon = newval->value;
961 if (bond->params.updelay)
962 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
963 bond->params.updelay * bond->params.miimon);
964 if (bond->params.downdelay)
965 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
966 bond->params.downdelay * bond->params.miimon);
967 if (bond->params.peer_notif_delay)
968 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
969 bond->params.peer_notif_delay * bond->params.miimon);
970 if (newval->value && bond->params.arp_interval) {
971 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
972 bond->params.arp_interval = 0;
973 if (bond->params.arp_validate)
974 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
975 }
976 if (bond->dev->flags & IFF_UP) {
977 /* If the interface is up, we may need to fire off
978 * the MII timer. If the interface is down, the
979 * timer will get fired off when the open function
980 * is called.
981 */
982 if (!newval->value) {
983 cancel_delayed_work_sync(&bond->mii_work);
984 } else {
985 cancel_delayed_work_sync(&bond->arp_work);
986 queue_delayed_work(bond->wq, &bond->mii_work, 0);
987 }
988 }
989
990 return 0;
991}
992
993/* Set up, down and peer notification delays. These must be multiples
994 * of the MII monitoring value, and are stored internally as the
995 * multiplier. Thus, we must translate to MS for the real world.
996 */
997static int _bond_option_delay_set(struct bonding *bond,
998 const struct bond_opt_value *newval,
999 const char *name,
1000 int *target)
1001{
1002 int value = newval->value;
1003
1004 if (!bond->params.miimon) {
1005 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
1006 name);
1007 return -EPERM;
1008 }
1009 if ((value % bond->params.miimon) != 0) {
1010 netdev_warn(bond->dev,
1011 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1012 name,
1013 value, bond->params.miimon,
1014 (value / bond->params.miimon) *
1015 bond->params.miimon);
1016 }
1017 *target = value / bond->params.miimon;
1018 netdev_dbg(bond->dev, "Setting %s to %d\n",
1019 name,
1020 *target * bond->params.miimon);
1021
1022 return 0;
1023}
1024
1025static int bond_option_updelay_set(struct bonding *bond,
1026 const struct bond_opt_value *newval)
1027{
1028 return _bond_option_delay_set(bond, newval, "up delay",
1029 &bond->params.updelay);
1030}
1031
1032static int bond_option_downdelay_set(struct bonding *bond,
1033 const struct bond_opt_value *newval)
1034{
1035 return _bond_option_delay_set(bond, newval, "down delay",
1036 &bond->params.downdelay);
1037}
1038
1039static int bond_option_peer_notif_delay_set(struct bonding *bond,
1040 const struct bond_opt_value *newval)
1041{
1042 int ret = _bond_option_delay_set(bond, newval,
1043 "peer notification delay",
1044 &bond->params.peer_notif_delay);
1045 return ret;
1046}
1047
1048static int bond_option_use_carrier_set(struct bonding *bond,
1049 const struct bond_opt_value *newval)
1050{
1051 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1052 newval->value);
1053 bond->params.use_carrier = newval->value;
1054
1055 return 0;
1056}
1057
1058/* There are two tricky bits here. First, if ARP monitoring is activated, then
1059 * we must disable MII monitoring. Second, if the ARP timer isn't running,
1060 * we must start it.
1061 */
1062static int bond_option_arp_interval_set(struct bonding *bond,
1063 const struct bond_opt_value *newval)
1064{
1065 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1066 newval->value);
1067 bond->params.arp_interval = newval->value;
1068 if (newval->value) {
1069 if (bond->params.miimon) {
1070 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1071 bond->params.miimon = 0;
1072 }
1073 if (!bond->params.arp_targets[0])
1074 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1075 }
1076 if (bond->dev->flags & IFF_UP) {
1077 /* If the interface is up, we may need to fire off
1078 * the ARP timer. If the interface is down, the
1079 * timer will get fired off when the open function
1080 * is called.
1081 */
1082 if (!newval->value) {
1083 if (bond->params.arp_validate)
1084 bond->recv_probe = NULL;
1085 cancel_delayed_work_sync(&bond->arp_work);
1086 } else {
1087 /* arp_validate can be set only in active-backup mode */
1088 bond->recv_probe = bond_rcv_validate;
1089 cancel_delayed_work_sync(&bond->mii_work);
1090 queue_delayed_work(bond->wq, &bond->arp_work, 0);
1091 }
1092 }
1093
1094 return 0;
1095}
1096
1097static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1098 __be32 target,
1099 unsigned long last_rx)
1100{
1101 __be32 *targets = bond->params.arp_targets;
1102 struct list_head *iter;
1103 struct slave *slave;
1104
1105 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1106 bond_for_each_slave(bond, slave, iter)
1107 slave->target_last_arp_rx[slot] = last_rx;
1108 targets[slot] = target;
1109 }
1110}
1111
1112static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1113{
1114 __be32 *targets = bond->params.arp_targets;
1115 int ind;
1116
1117 if (!bond_is_ip_target_ok(target)) {
1118 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1119 &target);
1120 return -EINVAL;
1121 }
1122
1123 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1124 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1125 &target);
1126 return -EINVAL;
1127 }
1128
1129 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1130 if (ind == -1) {
1131 netdev_err(bond->dev, "ARP target table is full!\n");
1132 return -EINVAL;
1133 }
1134
1135 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1136
1137 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1138
1139 return 0;
1140}
1141
1142static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1143{
1144 return _bond_option_arp_ip_target_add(bond, target);
1145}
1146
1147static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1148{
1149 __be32 *targets = bond->params.arp_targets;
1150 struct list_head *iter;
1151 struct slave *slave;
1152 unsigned long *targets_rx;
1153 int ind, i;
1154
1155 if (!bond_is_ip_target_ok(target)) {
1156 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1157 &target);
1158 return -EINVAL;
1159 }
1160
1161 ind = bond_get_targets_ip(targets, target);
1162 if (ind == -1) {
1163 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1164 &target);
1165 return -EINVAL;
1166 }
1167
1168 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1169 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1170
1171 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1172
1173 bond_for_each_slave(bond, slave, iter) {
1174 targets_rx = slave->target_last_arp_rx;
1175 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1176 targets_rx[i] = targets_rx[i+1];
1177 targets_rx[i] = 0;
1178 }
1179 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1180 targets[i] = targets[i+1];
1181 targets[i] = 0;
1182
1183 return 0;
1184}
1185
1186void bond_option_arp_ip_targets_clear(struct bonding *bond)
1187{
1188 int i;
1189
1190 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1191 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1192}
1193
1194static int bond_option_arp_ip_targets_set(struct bonding *bond,
1195 const struct bond_opt_value *newval)
1196{
1197 int ret = -EPERM;
1198 __be32 target;
1199
1200 if (newval->string) {
1201 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) {
1202 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n",
1203 &target);
1204 return ret;
1205 }
1206 if (newval->string[0] == '+')
1207 ret = bond_option_arp_ip_target_add(bond, target);
1208 else if (newval->string[0] == '-')
1209 ret = bond_option_arp_ip_target_rem(bond, target);
1210 else
1211 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1212 } else {
1213 target = newval->value;
1214 ret = bond_option_arp_ip_target_add(bond, target);
1215 }
1216
1217 return ret;
1218}
1219
1220#if IS_ENABLED(CONFIG_IPV6)
1221static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1222 struct in6_addr *target,
1223 unsigned long last_rx)
1224{
1225 struct in6_addr *targets = bond->params.ns_targets;
1226 struct list_head *iter;
1227 struct slave *slave;
1228
1229 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1230 bond_for_each_slave(bond, slave, iter)
1231 slave->target_last_arp_rx[slot] = last_rx;
1232 targets[slot] = *target;
1233 }
1234}
1235
1236void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1237{
1238 struct in6_addr addr_any = in6addr_any;
1239 int i;
1240
1241 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1242 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1243}
1244
1245static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1246 const struct bond_opt_value *newval)
1247{
1248 struct in6_addr *target = (struct in6_addr *)newval->extra;
1249 struct in6_addr *targets = bond->params.ns_targets;
1250 struct in6_addr addr_any = in6addr_any;
1251 int index;
1252
1253 if (!bond_is_ip6_target_ok(target)) {
1254 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1255 target);
1256 return -EINVAL;
1257 }
1258
1259 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1260 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1261 target);
1262 return -EINVAL;
1263 }
1264
1265 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1266 if (index == -1) {
1267 netdev_err(bond->dev, "NS target table is full!\n");
1268 return -EINVAL;
1269 }
1270
1271 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1272
1273 _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1274
1275 return 0;
1276}
1277#else
1278static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1279 const struct bond_opt_value *newval)
1280{
1281 return -EPERM;
1282}
1283#endif
1284
1285static int bond_option_arp_validate_set(struct bonding *bond,
1286 const struct bond_opt_value *newval)
1287{
1288 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1289 newval->string, newval->value);
1290 bond->params.arp_validate = newval->value;
1291
1292 return 0;
1293}
1294
1295static int bond_option_arp_all_targets_set(struct bonding *bond,
1296 const struct bond_opt_value *newval)
1297{
1298 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1299 newval->string, newval->value);
1300 bond->params.arp_all_targets = newval->value;
1301
1302 return 0;
1303}
1304
1305static int bond_option_missed_max_set(struct bonding *bond,
1306 const struct bond_opt_value *newval)
1307{
1308 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1309 newval->string, newval->value);
1310 bond->params.missed_max = newval->value;
1311
1312 return 0;
1313}
1314
1315static int bond_option_prio_set(struct bonding *bond,
1316 const struct bond_opt_value *newval)
1317{
1318 struct slave *slave;
1319
1320 slave = bond_slave_get_rtnl(newval->slave_dev);
1321 if (!slave) {
1322 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1323 return -ENODEV;
1324 }
1325 slave->prio = newval->value;
1326
1327 if (rtnl_dereference(bond->primary_slave))
1328 slave_warn(bond->dev, slave->dev,
1329 "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1330 else
1331 bond_select_active_slave(bond);
1332
1333 return 0;
1334}
1335
1336static int bond_option_primary_set(struct bonding *bond,
1337 const struct bond_opt_value *newval)
1338{
1339 char *p, *primary = newval->string;
1340 struct list_head *iter;
1341 struct slave *slave;
1342
1343 block_netpoll_tx();
1344
1345 p = strchr(primary, '\n');
1346 if (p)
1347 *p = '\0';
1348 /* check to see if we are clearing primary */
1349 if (!strlen(primary)) {
1350 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1351 RCU_INIT_POINTER(bond->primary_slave, NULL);
1352 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1353 bond_select_active_slave(bond);
1354 goto out;
1355 }
1356
1357 bond_for_each_slave(bond, slave, iter) {
1358 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1359 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1360 rcu_assign_pointer(bond->primary_slave, slave);
1361 strcpy(bond->params.primary, slave->dev->name);
1362 bond->force_primary = true;
1363 bond_select_active_slave(bond);
1364 goto out;
1365 }
1366 }
1367
1368 if (rtnl_dereference(bond->primary_slave)) {
1369 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1370 RCU_INIT_POINTER(bond->primary_slave, NULL);
1371 bond_select_active_slave(bond);
1372 }
1373 strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1374
1375 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1376 primary);
1377
1378out:
1379 unblock_netpoll_tx();
1380
1381 return 0;
1382}
1383
1384static int bond_option_primary_reselect_set(struct bonding *bond,
1385 const struct bond_opt_value *newval)
1386{
1387 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1388 newval->string, newval->value);
1389 bond->params.primary_reselect = newval->value;
1390
1391 block_netpoll_tx();
1392 bond_select_active_slave(bond);
1393 unblock_netpoll_tx();
1394
1395 return 0;
1396}
1397
1398static int bond_option_fail_over_mac_set(struct bonding *bond,
1399 const struct bond_opt_value *newval)
1400{
1401 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1402 newval->string, newval->value);
1403 bond->params.fail_over_mac = newval->value;
1404
1405 return 0;
1406}
1407
1408static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1409 const struct bond_opt_value *newval)
1410{
1411 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1412 newval->string, newval->value);
1413 bond->params.xmit_policy = newval->value;
1414
1415 return 0;
1416}
1417
1418static int bond_option_resend_igmp_set(struct bonding *bond,
1419 const struct bond_opt_value *newval)
1420{
1421 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1422 newval->value);
1423 bond->params.resend_igmp = newval->value;
1424
1425 return 0;
1426}
1427
1428static int bond_option_num_peer_notif_set(struct bonding *bond,
1429 const struct bond_opt_value *newval)
1430{
1431 bond->params.num_peer_notif = newval->value;
1432
1433 return 0;
1434}
1435
1436static int bond_option_all_slaves_active_set(struct bonding *bond,
1437 const struct bond_opt_value *newval)
1438{
1439 struct list_head *iter;
1440 struct slave *slave;
1441
1442 if (newval->value == bond->params.all_slaves_active)
1443 return 0;
1444 bond->params.all_slaves_active = newval->value;
1445 bond_for_each_slave(bond, slave, iter) {
1446 if (!bond_is_active_slave(slave)) {
1447 if (newval->value)
1448 slave->inactive = 0;
1449 else
1450 slave->inactive = 1;
1451 }
1452 }
1453
1454 return 0;
1455}
1456
1457static int bond_option_min_links_set(struct bonding *bond,
1458 const struct bond_opt_value *newval)
1459{
1460 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1461 newval->value);
1462 bond->params.min_links = newval->value;
1463 bond_set_carrier(bond);
1464
1465 return 0;
1466}
1467
1468static int bond_option_lp_interval_set(struct bonding *bond,
1469 const struct bond_opt_value *newval)
1470{
1471 bond->params.lp_interval = newval->value;
1472
1473 return 0;
1474}
1475
1476static int bond_option_pps_set(struct bonding *bond,
1477 const struct bond_opt_value *newval)
1478{
1479 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1480 newval->value);
1481 bond->params.packets_per_slave = newval->value;
1482 if (newval->value > 0) {
1483 bond->params.reciprocal_packets_per_slave =
1484 reciprocal_value(newval->value);
1485 } else {
1486 /* reciprocal_packets_per_slave is unused if
1487 * packets_per_slave is 0 or 1, just initialize it
1488 */
1489 bond->params.reciprocal_packets_per_slave =
1490 (struct reciprocal_value) { 0 };
1491 }
1492
1493 return 0;
1494}
1495
1496static int bond_option_lacp_active_set(struct bonding *bond,
1497 const struct bond_opt_value *newval)
1498{
1499 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1500 newval->string, newval->value);
1501 bond->params.lacp_active = newval->value;
1502
1503 return 0;
1504}
1505
1506static int bond_option_lacp_rate_set(struct bonding *bond,
1507 const struct bond_opt_value *newval)
1508{
1509 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1510 newval->string, newval->value);
1511 bond->params.lacp_fast = newval->value;
1512 bond_3ad_update_lacp_rate(bond);
1513
1514 return 0;
1515}
1516
1517static int bond_option_ad_select_set(struct bonding *bond,
1518 const struct bond_opt_value *newval)
1519{
1520 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1521 newval->string, newval->value);
1522 bond->params.ad_select = newval->value;
1523
1524 return 0;
1525}
1526
1527static int bond_option_queue_id_set(struct bonding *bond,
1528 const struct bond_opt_value *newval)
1529{
1530 struct slave *slave, *update_slave;
1531 struct net_device *sdev;
1532 struct list_head *iter;
1533 char *delim;
1534 int ret = 0;
1535 u16 qid;
1536
1537 /* delim will point to queue id if successful */
1538 delim = strchr(newval->string, ':');
1539 if (!delim)
1540 goto err_no_cmd;
1541
1542 /* Terminate string that points to device name and bump it
1543 * up one, so we can read the queue id there.
1544 */
1545 *delim = '\0';
1546 if (sscanf(++delim, "%hd\n", &qid) != 1)
1547 goto err_no_cmd;
1548
1549 /* Check buffer length, valid ifname and queue id */
1550 if (!dev_valid_name(newval->string) ||
1551 qid > bond->dev->real_num_tx_queues)
1552 goto err_no_cmd;
1553
1554 /* Get the pointer to that interface if it exists */
1555 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1556 if (!sdev)
1557 goto err_no_cmd;
1558
1559 /* Search for thes slave and check for duplicate qids */
1560 update_slave = NULL;
1561 bond_for_each_slave(bond, slave, iter) {
1562 if (sdev == slave->dev)
1563 /* We don't need to check the matching
1564 * slave for dups, since we're overwriting it
1565 */
1566 update_slave = slave;
1567 else if (qid && qid == slave->queue_id) {
1568 goto err_no_cmd;
1569 }
1570 }
1571
1572 if (!update_slave)
1573 goto err_no_cmd;
1574
1575 /* Actually set the qids for the slave */
1576 update_slave->queue_id = qid;
1577
1578out:
1579 return ret;
1580
1581err_no_cmd:
1582 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1583 ret = -EPERM;
1584 goto out;
1585
1586}
1587
1588static int bond_option_slaves_set(struct bonding *bond,
1589 const struct bond_opt_value *newval)
1590{
1591 char command[IFNAMSIZ + 1] = { 0, };
1592 struct net_device *dev;
1593 char *ifname;
1594 int ret;
1595
1596 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1597 ifname = command + 1;
1598 if ((strlen(command) <= 1) ||
1599 (command[0] != '+' && command[0] != '-') ||
1600 !dev_valid_name(ifname))
1601 goto err_no_cmd;
1602
1603 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1604 if (!dev) {
1605 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1606 ifname);
1607 ret = -ENODEV;
1608 goto out;
1609 }
1610
1611 switch (command[0]) {
1612 case '+':
1613 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1614 ret = bond_enslave(bond->dev, dev, NULL);
1615 break;
1616
1617 case '-':
1618 slave_dbg(bond->dev, dev, "Releasing interface\n");
1619 ret = bond_release(bond->dev, dev);
1620 break;
1621
1622 default:
1623 /* should not run here. */
1624 goto err_no_cmd;
1625 }
1626
1627out:
1628 return ret;
1629
1630err_no_cmd:
1631 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1632 ret = -EPERM;
1633 goto out;
1634}
1635
1636static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1637 const struct bond_opt_value *newval)
1638{
1639 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1640 newval->string, newval->value);
1641 bond->params.tlb_dynamic_lb = newval->value;
1642
1643 return 0;
1644}
1645
1646static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1647 const struct bond_opt_value *newval)
1648{
1649 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1650 newval->value);
1651
1652 bond->params.ad_actor_sys_prio = newval->value;
1653 bond_3ad_update_ad_actor_settings(bond);
1654
1655 return 0;
1656}
1657
1658static int bond_option_ad_actor_system_set(struct bonding *bond,
1659 const struct bond_opt_value *newval)
1660{
1661 u8 macaddr[ETH_ALEN];
1662 u8 *mac;
1663
1664 if (newval->string) {
1665 if (!mac_pton(newval->string, macaddr))
1666 goto err;
1667 mac = macaddr;
1668 } else {
1669 mac = (u8 *)&newval->value;
1670 }
1671
1672 if (is_multicast_ether_addr(mac))
1673 goto err;
1674
1675 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1676 ether_addr_copy(bond->params.ad_actor_system, mac);
1677 bond_3ad_update_ad_actor_settings(bond);
1678
1679 return 0;
1680
1681err:
1682 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1683 return -EINVAL;
1684}
1685
1686static int bond_option_ad_user_port_key_set(struct bonding *bond,
1687 const struct bond_opt_value *newval)
1688{
1689 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1690 newval->value);
1691
1692 bond->params.ad_user_port_key = newval->value;
1693 return 0;
1694}