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