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