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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#include <net/ndisc.h>
19
20static int bond_option_active_slave_set(struct bonding *bond,
21 const struct bond_opt_value *newval);
22static int bond_option_miimon_set(struct bonding *bond,
23 const struct bond_opt_value *newval);
24static int bond_option_updelay_set(struct bonding *bond,
25 const struct bond_opt_value *newval);
26static int bond_option_downdelay_set(struct bonding *bond,
27 const struct bond_opt_value *newval);
28static int bond_option_peer_notif_delay_set(struct bonding *bond,
29 const struct bond_opt_value *newval);
30static int bond_option_use_carrier_set(struct bonding *bond,
31 const struct bond_opt_value *newval);
32static int bond_option_arp_interval_set(struct bonding *bond,
33 const struct bond_opt_value *newval);
34static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
35static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
36static int bond_option_arp_ip_targets_set(struct bonding *bond,
37 const struct bond_opt_value *newval);
38static int bond_option_ns_ip6_targets_set(struct bonding *bond,
39 const struct bond_opt_value *newval);
40static int bond_option_arp_validate_set(struct bonding *bond,
41 const struct bond_opt_value *newval);
42static int bond_option_arp_all_targets_set(struct bonding *bond,
43 const struct bond_opt_value *newval);
44static int bond_option_prio_set(struct bonding *bond,
45 const struct bond_opt_value *newval);
46static int bond_option_primary_set(struct bonding *bond,
47 const struct bond_opt_value *newval);
48static int bond_option_primary_reselect_set(struct bonding *bond,
49 const struct bond_opt_value *newval);
50static int bond_option_fail_over_mac_set(struct bonding *bond,
51 const struct bond_opt_value *newval);
52static int bond_option_xmit_hash_policy_set(struct bonding *bond,
53 const struct bond_opt_value *newval);
54static int bond_option_resend_igmp_set(struct bonding *bond,
55 const struct bond_opt_value *newval);
56static int bond_option_num_peer_notif_set(struct bonding *bond,
57 const struct bond_opt_value *newval);
58static int bond_option_all_slaves_active_set(struct bonding *bond,
59 const struct bond_opt_value *newval);
60static int bond_option_min_links_set(struct bonding *bond,
61 const struct bond_opt_value *newval);
62static int bond_option_lp_interval_set(struct bonding *bond,
63 const struct bond_opt_value *newval);
64static int bond_option_pps_set(struct bonding *bond,
65 const struct bond_opt_value *newval);
66static int bond_option_lacp_active_set(struct bonding *bond,
67 const struct bond_opt_value *newval);
68static int bond_option_lacp_rate_set(struct bonding *bond,
69 const struct bond_opt_value *newval);
70static int bond_option_ad_select_set(struct bonding *bond,
71 const struct bond_opt_value *newval);
72static int bond_option_queue_id_set(struct bonding *bond,
73 const struct bond_opt_value *newval);
74static int bond_option_mode_set(struct bonding *bond,
75 const struct bond_opt_value *newval);
76static int bond_option_slaves_set(struct bonding *bond,
77 const struct bond_opt_value *newval);
78static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
79 const struct bond_opt_value *newval);
80static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
81 const struct bond_opt_value *newval);
82static int bond_option_ad_actor_system_set(struct bonding *bond,
83 const struct bond_opt_value *newval);
84static int bond_option_ad_user_port_key_set(struct bonding *bond,
85 const struct bond_opt_value *newval);
86static int bond_option_missed_max_set(struct bonding *bond,
87 const struct bond_opt_value *newval);
88static int bond_option_coupled_control_set(struct bonding *bond,
89 const struct bond_opt_value *newval);
90
91static const struct bond_opt_value bond_mode_tbl[] = {
92 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
93 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
94 { "balance-xor", BOND_MODE_XOR, 0},
95 { "broadcast", BOND_MODE_BROADCAST, 0},
96 { "802.3ad", BOND_MODE_8023AD, 0},
97 { "balance-tlb", BOND_MODE_TLB, 0},
98 { "balance-alb", BOND_MODE_ALB, 0},
99 { NULL, -1, 0},
100};
101
102static const struct bond_opt_value bond_pps_tbl[] = {
103 { "default", 1, BOND_VALFLAG_DEFAULT},
104 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
105 { NULL, -1, 0},
106};
107
108static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
109 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
110 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
111 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
112 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
113 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
114 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
115 { NULL, -1, 0},
116};
117
118static const struct bond_opt_value bond_arp_validate_tbl[] = {
119 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
120 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
121 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
122 { "all", BOND_ARP_VALIDATE_ALL, 0},
123 { "filter", BOND_ARP_FILTER, 0},
124 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
125 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
126 { NULL, -1, 0},
127};
128
129static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
130 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
131 { "all", BOND_ARP_TARGETS_ALL, 0},
132 { NULL, -1, 0},
133};
134
135static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
136 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
137 { "active", BOND_FOM_ACTIVE, 0},
138 { "follow", BOND_FOM_FOLLOW, 0},
139 { NULL, -1, 0},
140};
141
142static const struct bond_opt_value bond_intmax_tbl[] = {
143 { "off", 0, BOND_VALFLAG_DEFAULT},
144 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
145 { NULL, -1, 0}
146};
147
148static const struct bond_opt_value bond_lacp_active[] = {
149 { "off", 0, 0},
150 { "on", 1, BOND_VALFLAG_DEFAULT},
151 { NULL, -1, 0}
152};
153
154static const struct bond_opt_value bond_lacp_rate_tbl[] = {
155 { "slow", AD_LACP_SLOW, 0},
156 { "fast", AD_LACP_FAST, 0},
157 { NULL, -1, 0},
158};
159
160static const struct bond_opt_value bond_ad_select_tbl[] = {
161 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
162 { "bandwidth", BOND_AD_BANDWIDTH, 0},
163 { "count", BOND_AD_COUNT, 0},
164 { NULL, -1, 0},
165};
166
167static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
168 { "off", 0, 0},
169 { "maxval", 255, BOND_VALFLAG_MAX},
170 { "default", 1, BOND_VALFLAG_DEFAULT},
171 { NULL, -1, 0}
172};
173
174static const struct bond_opt_value bond_peer_notif_delay_tbl[] = {
175 { "off", 0, 0},
176 { "maxval", 300000, BOND_VALFLAG_MAX},
177 { NULL, -1, 0}
178};
179
180static const struct bond_opt_value bond_primary_reselect_tbl[] = {
181 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
182 { "better", BOND_PRI_RESELECT_BETTER, 0},
183 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
184 { NULL, -1},
185};
186
187static const struct bond_opt_value bond_use_carrier_tbl[] = {
188 { "off", 0, 0},
189 { "on", 1, BOND_VALFLAG_DEFAULT},
190 { NULL, -1, 0}
191};
192
193static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
194 { "off", 0, BOND_VALFLAG_DEFAULT},
195 { "on", 1, 0},
196 { NULL, -1, 0}
197};
198
199static const struct bond_opt_value bond_resend_igmp_tbl[] = {
200 { "off", 0, 0},
201 { "maxval", 255, BOND_VALFLAG_MAX},
202 { "default", 1, BOND_VALFLAG_DEFAULT},
203 { NULL, -1, 0}
204};
205
206static const struct bond_opt_value bond_lp_interval_tbl[] = {
207 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
208 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
209 { NULL, -1, 0},
210};
211
212static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
213 { "off", 0, 0},
214 { "on", 1, BOND_VALFLAG_DEFAULT},
215 { NULL, -1, 0}
216};
217
218static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
219 { "minval", 1, BOND_VALFLAG_MIN},
220 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
221 { NULL, -1, 0},
222};
223
224static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
225 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
226 { "maxval", 1023, BOND_VALFLAG_MAX},
227 { NULL, -1, 0},
228};
229
230static const struct bond_opt_value bond_missed_max_tbl[] = {
231 { "minval", 1, BOND_VALFLAG_MIN},
232 { "maxval", 255, BOND_VALFLAG_MAX},
233 { "default", 2, BOND_VALFLAG_DEFAULT},
234 { NULL, -1, 0},
235};
236
237static const struct bond_opt_value bond_coupled_control_tbl[] = {
238 { "on", 1, BOND_VALFLAG_DEFAULT},
239 { "off", 0, 0},
240 { NULL, -1, 0},
241};
242
243static const struct bond_option bond_opts[BOND_OPT_LAST] = {
244 [BOND_OPT_MODE] = {
245 .id = BOND_OPT_MODE,
246 .name = "mode",
247 .desc = "bond device mode",
248 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
249 .values = bond_mode_tbl,
250 .set = bond_option_mode_set
251 },
252 [BOND_OPT_PACKETS_PER_SLAVE] = {
253 .id = BOND_OPT_PACKETS_PER_SLAVE,
254 .name = "packets_per_slave",
255 .desc = "Packets to send per slave in RR mode",
256 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
257 .values = bond_pps_tbl,
258 .set = bond_option_pps_set
259 },
260 [BOND_OPT_XMIT_HASH] = {
261 .id = BOND_OPT_XMIT_HASH,
262 .name = "xmit_hash_policy",
263 .desc = "balance-xor, 802.3ad, and tlb hashing method",
264 .values = bond_xmit_hashtype_tbl,
265 .set = bond_option_xmit_hash_policy_set
266 },
267 [BOND_OPT_ARP_VALIDATE] = {
268 .id = BOND_OPT_ARP_VALIDATE,
269 .name = "arp_validate",
270 .desc = "validate src/dst of ARP probes",
271 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
272 BIT(BOND_MODE_ALB),
273 .values = bond_arp_validate_tbl,
274 .set = bond_option_arp_validate_set
275 },
276 [BOND_OPT_ARP_ALL_TARGETS] = {
277 .id = BOND_OPT_ARP_ALL_TARGETS,
278 .name = "arp_all_targets",
279 .desc = "fail on any/all arp targets timeout",
280 .values = bond_arp_all_targets_tbl,
281 .set = bond_option_arp_all_targets_set
282 },
283 [BOND_OPT_FAIL_OVER_MAC] = {
284 .id = BOND_OPT_FAIL_OVER_MAC,
285 .name = "fail_over_mac",
286 .desc = "For active-backup, do not set all slaves to the same MAC",
287 .flags = BOND_OPTFLAG_NOSLAVES,
288 .values = bond_fail_over_mac_tbl,
289 .set = bond_option_fail_over_mac_set
290 },
291 [BOND_OPT_ARP_INTERVAL] = {
292 .id = BOND_OPT_ARP_INTERVAL,
293 .name = "arp_interval",
294 .desc = "arp interval in milliseconds",
295 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
296 BIT(BOND_MODE_ALB),
297 .values = bond_intmax_tbl,
298 .set = bond_option_arp_interval_set
299 },
300 [BOND_OPT_MISSED_MAX] = {
301 .id = BOND_OPT_MISSED_MAX,
302 .name = "arp_missed_max",
303 .desc = "Maximum number of missed ARP interval",
304 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
305 BIT(BOND_MODE_ALB),
306 .values = bond_missed_max_tbl,
307 .set = bond_option_missed_max_set
308 },
309 [BOND_OPT_ARP_TARGETS] = {
310 .id = BOND_OPT_ARP_TARGETS,
311 .name = "arp_ip_target",
312 .desc = "arp targets in n.n.n.n form",
313 .flags = BOND_OPTFLAG_RAWVAL,
314 .set = bond_option_arp_ip_targets_set
315 },
316 [BOND_OPT_NS_TARGETS] = {
317 .id = BOND_OPT_NS_TARGETS,
318 .name = "ns_ip6_target",
319 .desc = "NS targets in ffff:ffff::ffff:ffff form",
320 .flags = BOND_OPTFLAG_RAWVAL,
321 .set = bond_option_ns_ip6_targets_set
322 },
323 [BOND_OPT_DOWNDELAY] = {
324 .id = BOND_OPT_DOWNDELAY,
325 .name = "downdelay",
326 .desc = "Delay before considering link down, in milliseconds",
327 .values = bond_intmax_tbl,
328 .set = bond_option_downdelay_set
329 },
330 [BOND_OPT_UPDELAY] = {
331 .id = BOND_OPT_UPDELAY,
332 .name = "updelay",
333 .desc = "Delay before considering link up, in milliseconds",
334 .values = bond_intmax_tbl,
335 .set = bond_option_updelay_set
336 },
337 [BOND_OPT_LACP_ACTIVE] = {
338 .id = BOND_OPT_LACP_ACTIVE,
339 .name = "lacp_active",
340 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
341 .flags = BOND_OPTFLAG_IFDOWN,
342 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
343 .values = bond_lacp_active,
344 .set = bond_option_lacp_active_set
345 },
346 [BOND_OPT_LACP_RATE] = {
347 .id = BOND_OPT_LACP_RATE,
348 .name = "lacp_rate",
349 .desc = "LACPDU tx rate to request from 802.3ad partner",
350 .flags = BOND_OPTFLAG_IFDOWN,
351 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
352 .values = bond_lacp_rate_tbl,
353 .set = bond_option_lacp_rate_set
354 },
355 [BOND_OPT_MINLINKS] = {
356 .id = BOND_OPT_MINLINKS,
357 .name = "min_links",
358 .desc = "Minimum number of available links before turning on carrier",
359 .values = bond_intmax_tbl,
360 .set = bond_option_min_links_set
361 },
362 [BOND_OPT_AD_SELECT] = {
363 .id = BOND_OPT_AD_SELECT,
364 .name = "ad_select",
365 .desc = "803.ad aggregation selection logic",
366 .flags = BOND_OPTFLAG_IFDOWN,
367 .values = bond_ad_select_tbl,
368 .set = bond_option_ad_select_set
369 },
370 [BOND_OPT_NUM_PEER_NOTIF] = {
371 .id = BOND_OPT_NUM_PEER_NOTIF,
372 .name = "num_unsol_na",
373 .desc = "Number of peer notifications to send on failover event",
374 .values = bond_num_peer_notif_tbl,
375 .set = bond_option_num_peer_notif_set
376 },
377 [BOND_OPT_MIIMON] = {
378 .id = BOND_OPT_MIIMON,
379 .name = "miimon",
380 .desc = "Link check interval in milliseconds",
381 .values = bond_intmax_tbl,
382 .set = bond_option_miimon_set
383 },
384 [BOND_OPT_PRIO] = {
385 .id = BOND_OPT_PRIO,
386 .name = "prio",
387 .desc = "Link priority for failover re-selection",
388 .flags = BOND_OPTFLAG_RAWVAL,
389 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
390 BIT(BOND_MODE_TLB) |
391 BIT(BOND_MODE_ALB)),
392 .set = bond_option_prio_set
393 },
394 [BOND_OPT_PRIMARY] = {
395 .id = BOND_OPT_PRIMARY,
396 .name = "primary",
397 .desc = "Primary network device to use",
398 .flags = BOND_OPTFLAG_RAWVAL,
399 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
400 BIT(BOND_MODE_TLB) |
401 BIT(BOND_MODE_ALB)),
402 .set = bond_option_primary_set
403 },
404 [BOND_OPT_PRIMARY_RESELECT] = {
405 .id = BOND_OPT_PRIMARY_RESELECT,
406 .name = "primary_reselect",
407 .desc = "Reselect primary slave once it comes up",
408 .values = bond_primary_reselect_tbl,
409 .set = bond_option_primary_reselect_set
410 },
411 [BOND_OPT_USE_CARRIER] = {
412 .id = BOND_OPT_USE_CARRIER,
413 .name = "use_carrier",
414 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon",
415 .values = bond_use_carrier_tbl,
416 .set = bond_option_use_carrier_set
417 },
418 [BOND_OPT_ACTIVE_SLAVE] = {
419 .id = BOND_OPT_ACTIVE_SLAVE,
420 .name = "active_slave",
421 .desc = "Currently active slave",
422 .flags = BOND_OPTFLAG_RAWVAL,
423 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
424 BIT(BOND_MODE_TLB) |
425 BIT(BOND_MODE_ALB)),
426 .set = bond_option_active_slave_set
427 },
428 [BOND_OPT_QUEUE_ID] = {
429 .id = BOND_OPT_QUEUE_ID,
430 .name = "queue_id",
431 .desc = "Set queue id of a slave",
432 .flags = BOND_OPTFLAG_RAWVAL,
433 .set = bond_option_queue_id_set
434 },
435 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
436 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
437 .name = "all_slaves_active",
438 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
439 .values = bond_all_slaves_active_tbl,
440 .set = bond_option_all_slaves_active_set
441 },
442 [BOND_OPT_RESEND_IGMP] = {
443 .id = BOND_OPT_RESEND_IGMP,
444 .name = "resend_igmp",
445 .desc = "Number of IGMP membership reports to send on link failure",
446 .values = bond_resend_igmp_tbl,
447 .set = bond_option_resend_igmp_set
448 },
449 [BOND_OPT_LP_INTERVAL] = {
450 .id = BOND_OPT_LP_INTERVAL,
451 .name = "lp_interval",
452 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
453 .values = bond_lp_interval_tbl,
454 .set = bond_option_lp_interval_set
455 },
456 [BOND_OPT_SLAVES] = {
457 .id = BOND_OPT_SLAVES,
458 .name = "slaves",
459 .desc = "Slave membership management",
460 .flags = BOND_OPTFLAG_RAWVAL,
461 .set = bond_option_slaves_set
462 },
463 [BOND_OPT_TLB_DYNAMIC_LB] = {
464 .id = BOND_OPT_TLB_DYNAMIC_LB,
465 .name = "tlb_dynamic_lb",
466 .desc = "Enable dynamic flow shuffling",
467 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
468 .values = bond_tlb_dynamic_lb_tbl,
469 .flags = BOND_OPTFLAG_IFDOWN,
470 .set = bond_option_tlb_dynamic_lb_set,
471 },
472 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
473 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
474 .name = "ad_actor_sys_prio",
475 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
476 .values = bond_ad_actor_sys_prio_tbl,
477 .set = bond_option_ad_actor_sys_prio_set,
478 },
479 [BOND_OPT_AD_ACTOR_SYSTEM] = {
480 .id = BOND_OPT_AD_ACTOR_SYSTEM,
481 .name = "ad_actor_system",
482 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
483 .flags = BOND_OPTFLAG_RAWVAL,
484 .set = bond_option_ad_actor_system_set,
485 },
486 [BOND_OPT_AD_USER_PORT_KEY] = {
487 .id = BOND_OPT_AD_USER_PORT_KEY,
488 .name = "ad_user_port_key",
489 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
490 .flags = BOND_OPTFLAG_IFDOWN,
491 .values = bond_ad_user_port_key_tbl,
492 .set = bond_option_ad_user_port_key_set,
493 },
494 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
495 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
496 .name = "num_grat_arp",
497 .desc = "Number of peer notifications to send on failover event",
498 .values = bond_num_peer_notif_tbl,
499 .set = bond_option_num_peer_notif_set
500 },
501 [BOND_OPT_PEER_NOTIF_DELAY] = {
502 .id = BOND_OPT_PEER_NOTIF_DELAY,
503 .name = "peer_notif_delay",
504 .desc = "Delay between each peer notification on failover event, in milliseconds",
505 .values = bond_peer_notif_delay_tbl,
506 .set = bond_option_peer_notif_delay_set
507 },
508 [BOND_OPT_COUPLED_CONTROL] = {
509 .id = BOND_OPT_COUPLED_CONTROL,
510 .name = "coupled_control",
511 .desc = "Opt into using coupled control MUX for LACP states",
512 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
513 .flags = BOND_OPTFLAG_IFDOWN,
514 .values = bond_coupled_control_tbl,
515 .set = bond_option_coupled_control_set,
516 }
517};
518
519/* Searches for an option by name */
520const struct bond_option *bond_opt_get_by_name(const char *name)
521{
522 const struct bond_option *opt;
523 int option;
524
525 for (option = 0; option < BOND_OPT_LAST; option++) {
526 opt = bond_opt_get(option);
527 if (opt && !strcmp(opt->name, name))
528 return opt;
529 }
530
531 return NULL;
532}
533
534/* Searches for a value in opt's values[] table */
535const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
536{
537 const struct bond_option *opt;
538 int i;
539
540 opt = bond_opt_get(option);
541 if (WARN_ON(!opt))
542 return NULL;
543 for (i = 0; opt->values && opt->values[i].string; i++)
544 if (opt->values[i].value == val)
545 return &opt->values[i];
546
547 return NULL;
548}
549
550/* Searches for a value in opt's values[] table which matches the flagmask */
551static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
552 u32 flagmask)
553{
554 int i;
555
556 for (i = 0; opt->values && opt->values[i].string; i++)
557 if (opt->values[i].flags & flagmask)
558 return &opt->values[i];
559
560 return NULL;
561}
562
563/* If maxval is missing then there's no range to check. In case minval is
564 * missing then it's considered to be 0.
565 */
566static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
567{
568 const struct bond_opt_value *minval, *maxval;
569
570 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
571 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
572 if (!maxval || (minval && val < minval->value) || val > maxval->value)
573 return false;
574
575 return true;
576}
577
578/**
579 * bond_opt_parse - parse option value
580 * @opt: the option to parse against
581 * @val: value to parse
582 *
583 * This function tries to extract the value from @val and check if it's
584 * a possible match for the option and returns NULL if a match isn't found,
585 * or the struct_opt_value that matched. It also strips the new line from
586 * @val->string if it's present.
587 */
588const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
589 struct bond_opt_value *val)
590{
591 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
592 const struct bond_opt_value *tbl;
593 const struct bond_opt_value *ret = NULL;
594 bool checkval;
595 int i, rv;
596
597 /* No parsing if the option wants a raw val */
598 if (opt->flags & BOND_OPTFLAG_RAWVAL)
599 return val;
600
601 tbl = opt->values;
602 if (!tbl)
603 goto out;
604
605 /* ULLONG_MAX is used to bypass string processing */
606 checkval = val->value != ULLONG_MAX;
607 if (!checkval) {
608 if (!val->string)
609 goto out;
610 p = strchr(val->string, '\n');
611 if (p)
612 *p = '\0';
613 for (p = val->string; *p; p++)
614 if (!(isdigit(*p) || isspace(*p)))
615 break;
616 /* The following code extracts the string to match or the value
617 * and sets checkval appropriately
618 */
619 if (*p) {
620 rv = sscanf(val->string, "%32s", valstr);
621 } else {
622 rv = sscanf(val->string, "%llu", &val->value);
623 checkval = true;
624 }
625 if (!rv)
626 goto out;
627 }
628
629 for (i = 0; tbl[i].string; i++) {
630 /* Check for exact match */
631 if (checkval) {
632 if (val->value == tbl[i].value)
633 ret = &tbl[i];
634 } else {
635 if (!strcmp(valstr, "default") &&
636 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
637 ret = &tbl[i];
638
639 if (!strcmp(valstr, tbl[i].string))
640 ret = &tbl[i];
641 }
642 /* Found an exact match */
643 if (ret)
644 goto out;
645 }
646 /* Possible range match */
647 if (checkval && bond_opt_check_range(opt, val->value))
648 ret = val;
649out:
650 return ret;
651}
652
653/* Check opt's dependencies against bond mode and currently set options */
654static int bond_opt_check_deps(struct bonding *bond,
655 const struct bond_option *opt)
656{
657 struct bond_params *params = &bond->params;
658
659 if (test_bit(params->mode, &opt->unsuppmodes))
660 return -EACCES;
661 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
662 return -ENOTEMPTY;
663 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
664 return -EBUSY;
665
666 return 0;
667}
668
669static void bond_opt_dep_print(struct bonding *bond,
670 const struct bond_option *opt,
671 struct nlattr *bad_attr,
672 struct netlink_ext_ack *extack)
673{
674 const struct bond_opt_value *modeval;
675 struct bond_params *params;
676
677 params = &bond->params;
678 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
679 if (test_bit(params->mode, &opt->unsuppmodes)) {
680 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
681 opt->name, modeval->string, modeval->value);
682 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
683 "option not supported in mode");
684 }
685}
686
687static void bond_opt_error_interpret(struct bonding *bond,
688 const struct bond_option *opt,
689 int error, const struct bond_opt_value *val,
690 struct nlattr *bad_attr,
691 struct netlink_ext_ack *extack)
692{
693 const struct bond_opt_value *minval, *maxval;
694 char *p;
695
696 switch (error) {
697 case -EINVAL:
698 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
699 if (val) {
700 if (val->string) {
701 /* sometimes RAWVAL opts may have new lines */
702 p = strchr(val->string, '\n');
703 if (p)
704 *p = '\0';
705 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
706 opt->name, val->string);
707 } else {
708 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
709 opt->name, val->value);
710 }
711 }
712 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
713 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
714 if (!maxval)
715 break;
716 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
717 opt->name, minval ? minval->value : 0, maxval->value);
718 break;
719 case -EACCES:
720 bond_opt_dep_print(bond, opt, bad_attr, extack);
721 break;
722 case -ENOTEMPTY:
723 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
724 "unable to set option because the bond device has slaves");
725 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
726 opt->name);
727 break;
728 case -EBUSY:
729 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
730 "unable to set option because the bond is up");
731 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
732 opt->name);
733 break;
734 case -ENODEV:
735 if (val && val->string) {
736 p = strchr(val->string, '\n');
737 if (p)
738 *p = '\0';
739 netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
740 opt->name, val->string);
741 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
742 "interface does not exist");
743 }
744 break;
745 default:
746 break;
747 }
748}
749
750/**
751 * __bond_opt_set - set a bonding option
752 * @bond: target bond device
753 * @option: option to set
754 * @val: value to set it to
755 * @bad_attr: netlink attribue that caused the error
756 * @extack: extended netlink error structure, used when an error message
757 * needs to be returned to the caller via netlink
758 *
759 * This function is used to change the bond's option value, it can be
760 * used for both enabling/changing an option and for disabling it. RTNL lock
761 * must be obtained before calling this function.
762 */
763int __bond_opt_set(struct bonding *bond,
764 unsigned int option, struct bond_opt_value *val,
765 struct nlattr *bad_attr, struct netlink_ext_ack *extack)
766{
767 const struct bond_opt_value *retval = NULL;
768 const struct bond_option *opt;
769 int ret = -ENOENT;
770
771 ASSERT_RTNL();
772
773 opt = bond_opt_get(option);
774 if (WARN_ON(!val) || WARN_ON(!opt))
775 goto out;
776 ret = bond_opt_check_deps(bond, opt);
777 if (ret)
778 goto out;
779 retval = bond_opt_parse(opt, val);
780 if (!retval) {
781 ret = -EINVAL;
782 goto out;
783 }
784 ret = opt->set(bond, retval);
785out:
786 if (ret)
787 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
788
789 return ret;
790}
791/**
792 * __bond_opt_set_notify - set a bonding option
793 * @bond: target bond device
794 * @option: option to set
795 * @val: value to set it to
796 *
797 * This function is used to change the bond's option value and trigger
798 * a notification to user sapce. It can be used for both enabling/changing
799 * an option and for disabling it. RTNL lock must be obtained before calling
800 * this function.
801 */
802int __bond_opt_set_notify(struct bonding *bond,
803 unsigned int option, struct bond_opt_value *val)
804{
805 int ret;
806
807 ASSERT_RTNL();
808
809 ret = __bond_opt_set(bond, option, val, NULL, NULL);
810
811 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
812 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
813
814 return ret;
815}
816
817/**
818 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
819 * @bond: target bond device
820 * @option: option to set
821 * @buf: value to set it to
822 *
823 * This function tries to acquire RTNL without blocking and if successful
824 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
825 */
826int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
827{
828 struct bond_opt_value optval;
829 int ret;
830
831 if (!rtnl_trylock())
832 return restart_syscall();
833 bond_opt_initstr(&optval, buf);
834 ret = __bond_opt_set_notify(bond, option, &optval);
835 rtnl_unlock();
836
837 return ret;
838}
839
840/**
841 * bond_opt_get - get a pointer to an option
842 * @option: option for which to return a pointer
843 *
844 * This function checks if option is valid and if so returns a pointer
845 * to its entry in the bond_opts[] option array.
846 */
847const struct bond_option *bond_opt_get(unsigned int option)
848{
849 if (!BOND_OPT_VALID(option))
850 return NULL;
851
852 return &bond_opts[option];
853}
854
855static bool bond_set_xfrm_features(struct bonding *bond)
856{
857 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
858 return false;
859
860 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
861 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
862 else
863 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
864
865 return true;
866}
867
868static int bond_option_mode_set(struct bonding *bond,
869 const struct bond_opt_value *newval)
870{
871 if (!bond_mode_uses_arp(newval->value)) {
872 if (bond->params.arp_interval) {
873 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
874 newval->string);
875 /* disable arp monitoring */
876 bond->params.arp_interval = 0;
877 }
878
879 if (!bond->params.miimon) {
880 /* set miimon to default value */
881 bond->params.miimon = BOND_DEFAULT_MIIMON;
882 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
883 bond->params.miimon);
884 }
885 }
886
887 if (newval->value == BOND_MODE_ALB)
888 bond->params.tlb_dynamic_lb = 1;
889
890 /* don't cache arp_validate between modes */
891 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
892 bond->params.mode = newval->value;
893
894 if (bond->dev->reg_state == NETREG_REGISTERED) {
895 bool update = false;
896
897 update |= bond_set_xfrm_features(bond);
898
899 if (update)
900 netdev_update_features(bond->dev);
901 }
902
903 bond_xdp_set_features(bond->dev);
904
905 return 0;
906}
907
908static int bond_option_active_slave_set(struct bonding *bond,
909 const struct bond_opt_value *newval)
910{
911 char ifname[IFNAMSIZ] = { 0, };
912 struct net_device *slave_dev;
913 int ret = 0;
914
915 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
916 if (!strlen(ifname) || newval->string[0] == '\n') {
917 slave_dev = NULL;
918 } else {
919 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
920 if (!slave_dev)
921 return -ENODEV;
922 }
923
924 if (slave_dev) {
925 if (!netif_is_bond_slave(slave_dev)) {
926 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
927 return -EINVAL;
928 }
929
930 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
931 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
932 return -EINVAL;
933 }
934 }
935
936 block_netpoll_tx();
937 /* check to see if we are clearing active */
938 if (!slave_dev) {
939 netdev_dbg(bond->dev, "Clearing current active slave\n");
940 bond_change_active_slave(bond, NULL);
941 bond_select_active_slave(bond);
942 } else {
943 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
944 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
945
946 BUG_ON(!new_active);
947
948 if (new_active == old_active) {
949 /* do nothing */
950 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
951 } else {
952 if (old_active && (new_active->link == BOND_LINK_UP) &&
953 bond_slave_is_up(new_active)) {
954 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
955 bond_change_active_slave(bond, new_active);
956 } else {
957 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
958 new_active->dev->name);
959 ret = -EINVAL;
960 }
961 }
962 }
963 unblock_netpoll_tx();
964
965 return ret;
966}
967
968/* There are two tricky bits here. First, if MII monitoring is activated, then
969 * we must disable ARP monitoring. Second, if the timer isn't running, we must
970 * start it.
971 */
972static int bond_option_miimon_set(struct bonding *bond,
973 const struct bond_opt_value *newval)
974{
975 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
976 newval->value);
977 bond->params.miimon = newval->value;
978 if (bond->params.updelay)
979 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
980 bond->params.updelay * bond->params.miimon);
981 if (bond->params.downdelay)
982 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
983 bond->params.downdelay * bond->params.miimon);
984 if (bond->params.peer_notif_delay)
985 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
986 bond->params.peer_notif_delay * bond->params.miimon);
987 if (newval->value && bond->params.arp_interval) {
988 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
989 bond->params.arp_interval = 0;
990 if (bond->params.arp_validate)
991 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
992 }
993 if (bond->dev->flags & IFF_UP) {
994 /* If the interface is up, we may need to fire off
995 * the MII timer. If the interface is down, the
996 * timer will get fired off when the open function
997 * is called.
998 */
999 if (!newval->value) {
1000 cancel_delayed_work_sync(&bond->mii_work);
1001 } else {
1002 cancel_delayed_work_sync(&bond->arp_work);
1003 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1004 }
1005 }
1006
1007 return 0;
1008}
1009
1010/* Set up, down and peer notification delays. These must be multiples
1011 * of the MII monitoring value, and are stored internally as the
1012 * multiplier. Thus, we must translate to MS for the real world.
1013 */
1014static int _bond_option_delay_set(struct bonding *bond,
1015 const struct bond_opt_value *newval,
1016 const char *name,
1017 int *target)
1018{
1019 int value = newval->value;
1020
1021 if (!bond->params.miimon) {
1022 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
1023 name);
1024 return -EPERM;
1025 }
1026 if ((value % bond->params.miimon) != 0) {
1027 netdev_warn(bond->dev,
1028 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1029 name,
1030 value, bond->params.miimon,
1031 (value / bond->params.miimon) *
1032 bond->params.miimon);
1033 }
1034 *target = value / bond->params.miimon;
1035 netdev_dbg(bond->dev, "Setting %s to %d\n",
1036 name,
1037 *target * bond->params.miimon);
1038
1039 return 0;
1040}
1041
1042static int bond_option_updelay_set(struct bonding *bond,
1043 const struct bond_opt_value *newval)
1044{
1045 return _bond_option_delay_set(bond, newval, "up delay",
1046 &bond->params.updelay);
1047}
1048
1049static int bond_option_downdelay_set(struct bonding *bond,
1050 const struct bond_opt_value *newval)
1051{
1052 return _bond_option_delay_set(bond, newval, "down delay",
1053 &bond->params.downdelay);
1054}
1055
1056static int bond_option_peer_notif_delay_set(struct bonding *bond,
1057 const struct bond_opt_value *newval)
1058{
1059 int ret = _bond_option_delay_set(bond, newval,
1060 "peer notification delay",
1061 &bond->params.peer_notif_delay);
1062 return ret;
1063}
1064
1065static int bond_option_use_carrier_set(struct bonding *bond,
1066 const struct bond_opt_value *newval)
1067{
1068 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1069 newval->value);
1070 bond->params.use_carrier = newval->value;
1071
1072 return 0;
1073}
1074
1075/* There are two tricky bits here. First, if ARP monitoring is activated, then
1076 * we must disable MII monitoring. Second, if the ARP timer isn't running,
1077 * we must start it.
1078 */
1079static int bond_option_arp_interval_set(struct bonding *bond,
1080 const struct bond_opt_value *newval)
1081{
1082 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1083 newval->value);
1084 bond->params.arp_interval = newval->value;
1085 if (newval->value) {
1086 if (bond->params.miimon) {
1087 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1088 bond->params.miimon = 0;
1089 }
1090 if (!bond->params.arp_targets[0])
1091 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1092 }
1093 if (bond->dev->flags & IFF_UP) {
1094 /* If the interface is up, we may need to fire off
1095 * the ARP timer. If the interface is down, the
1096 * timer will get fired off when the open function
1097 * is called.
1098 */
1099 if (!newval->value) {
1100 if (bond->params.arp_validate)
1101 bond->recv_probe = NULL;
1102 cancel_delayed_work_sync(&bond->arp_work);
1103 } else {
1104 /* arp_validate can be set only in active-backup mode */
1105 bond->recv_probe = bond_rcv_validate;
1106 cancel_delayed_work_sync(&bond->mii_work);
1107 queue_delayed_work(bond->wq, &bond->arp_work, 0);
1108 }
1109 }
1110
1111 return 0;
1112}
1113
1114static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1115 __be32 target,
1116 unsigned long last_rx)
1117{
1118 __be32 *targets = bond->params.arp_targets;
1119 struct list_head *iter;
1120 struct slave *slave;
1121
1122 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1123 bond_for_each_slave(bond, slave, iter)
1124 slave->target_last_arp_rx[slot] = last_rx;
1125 targets[slot] = target;
1126 }
1127}
1128
1129static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1130{
1131 __be32 *targets = bond->params.arp_targets;
1132 int ind;
1133
1134 if (!bond_is_ip_target_ok(target)) {
1135 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1136 &target);
1137 return -EINVAL;
1138 }
1139
1140 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1141 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1142 &target);
1143 return -EINVAL;
1144 }
1145
1146 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1147 if (ind == -1) {
1148 netdev_err(bond->dev, "ARP target table is full!\n");
1149 return -EINVAL;
1150 }
1151
1152 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1153
1154 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1155
1156 return 0;
1157}
1158
1159static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1160{
1161 return _bond_option_arp_ip_target_add(bond, target);
1162}
1163
1164static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1165{
1166 __be32 *targets = bond->params.arp_targets;
1167 struct list_head *iter;
1168 struct slave *slave;
1169 unsigned long *targets_rx;
1170 int ind, i;
1171
1172 if (!bond_is_ip_target_ok(target)) {
1173 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1174 &target);
1175 return -EINVAL;
1176 }
1177
1178 ind = bond_get_targets_ip(targets, target);
1179 if (ind == -1) {
1180 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1181 &target);
1182 return -EINVAL;
1183 }
1184
1185 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1186 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1187
1188 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1189
1190 bond_for_each_slave(bond, slave, iter) {
1191 targets_rx = slave->target_last_arp_rx;
1192 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1193 targets_rx[i] = targets_rx[i+1];
1194 targets_rx[i] = 0;
1195 }
1196 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1197 targets[i] = targets[i+1];
1198 targets[i] = 0;
1199
1200 return 0;
1201}
1202
1203void bond_option_arp_ip_targets_clear(struct bonding *bond)
1204{
1205 int i;
1206
1207 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1208 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1209}
1210
1211static int bond_option_arp_ip_targets_set(struct bonding *bond,
1212 const struct bond_opt_value *newval)
1213{
1214 int ret = -EPERM;
1215 __be32 target;
1216
1217 if (newval->string) {
1218 if (strlen(newval->string) < 1 ||
1219 !in4_pton(newval->string + 1, -1, (u8 *)&target, -1, NULL)) {
1220 netdev_err(bond->dev, "invalid ARP target specified\n");
1221 return ret;
1222 }
1223 if (newval->string[0] == '+')
1224 ret = bond_option_arp_ip_target_add(bond, target);
1225 else if (newval->string[0] == '-')
1226 ret = bond_option_arp_ip_target_rem(bond, target);
1227 else
1228 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1229 } else {
1230 target = newval->value;
1231 ret = bond_option_arp_ip_target_add(bond, target);
1232 }
1233
1234 return ret;
1235}
1236
1237#if IS_ENABLED(CONFIG_IPV6)
1238static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave)
1239{
1240 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
1241 !bond_is_active_slave(slave) &&
1242 slave->dev->flags & IFF_MULTICAST;
1243}
1244
1245static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add)
1246{
1247 struct in6_addr *targets = bond->params.ns_targets;
1248 char slot_maddr[MAX_ADDR_LEN];
1249 int i;
1250
1251 if (!slave_can_set_ns_maddr(bond, slave))
1252 return;
1253
1254 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
1255 if (ipv6_addr_any(&targets[i]))
1256 break;
1257
1258 if (!ndisc_mc_map(&targets[i], slot_maddr, slave->dev, 0)) {
1259 if (add)
1260 dev_mc_add(slave->dev, slot_maddr);
1261 else
1262 dev_mc_del(slave->dev, slot_maddr);
1263 }
1264 }
1265}
1266
1267void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave)
1268{
1269 if (!bond->params.arp_validate)
1270 return;
1271 slave_set_ns_maddrs(bond, slave, true);
1272}
1273
1274void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave)
1275{
1276 if (!bond->params.arp_validate)
1277 return;
1278 slave_set_ns_maddrs(bond, slave, false);
1279}
1280
1281static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave,
1282 struct in6_addr *target, struct in6_addr *slot)
1283{
1284 char target_maddr[MAX_ADDR_LEN], slot_maddr[MAX_ADDR_LEN];
1285
1286 if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave))
1287 return;
1288
1289 /* remove the previous maddr from slave */
1290 if (!ipv6_addr_any(slot) &&
1291 !ndisc_mc_map(slot, slot_maddr, slave->dev, 0))
1292 dev_mc_del(slave->dev, slot_maddr);
1293
1294 /* add new maddr on slave if target is set */
1295 if (!ipv6_addr_any(target) &&
1296 !ndisc_mc_map(target, target_maddr, slave->dev, 0))
1297 dev_mc_add(slave->dev, target_maddr);
1298}
1299
1300static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1301 struct in6_addr *target,
1302 unsigned long last_rx)
1303{
1304 struct in6_addr *targets = bond->params.ns_targets;
1305 struct list_head *iter;
1306 struct slave *slave;
1307
1308 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1309 bond_for_each_slave(bond, slave, iter) {
1310 slave->target_last_arp_rx[slot] = last_rx;
1311 slave_set_ns_maddr(bond, slave, target, &targets[slot]);
1312 }
1313 targets[slot] = *target;
1314 }
1315}
1316
1317void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1318{
1319 struct in6_addr addr_any = in6addr_any;
1320 int i;
1321
1322 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1323 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1324}
1325
1326static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1327 const struct bond_opt_value *newval)
1328{
1329 struct in6_addr *target = (struct in6_addr *)newval->extra;
1330 struct in6_addr *targets = bond->params.ns_targets;
1331 struct in6_addr addr_any = in6addr_any;
1332 int index;
1333
1334 if (!bond_is_ip6_target_ok(target)) {
1335 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1336 target);
1337 return -EINVAL;
1338 }
1339
1340 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1341 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1342 target);
1343 return -EINVAL;
1344 }
1345
1346 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1347 if (index == -1) {
1348 netdev_err(bond->dev, "NS target table is full!\n");
1349 return -EINVAL;
1350 }
1351
1352 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1353
1354 _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1355
1356 return 0;
1357}
1358#else
1359static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1360 const struct bond_opt_value *newval)
1361{
1362 return -EPERM;
1363}
1364
1365static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {}
1366
1367void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {}
1368
1369void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {}
1370#endif
1371
1372static int bond_option_arp_validate_set(struct bonding *bond,
1373 const struct bond_opt_value *newval)
1374{
1375 bool changed = !!bond->params.arp_validate != !!newval->value;
1376 struct list_head *iter;
1377 struct slave *slave;
1378
1379 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1380 newval->string, newval->value);
1381 bond->params.arp_validate = newval->value;
1382
1383 if (changed) {
1384 bond_for_each_slave(bond, slave, iter)
1385 slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate);
1386 }
1387
1388 return 0;
1389}
1390
1391static int bond_option_arp_all_targets_set(struct bonding *bond,
1392 const struct bond_opt_value *newval)
1393{
1394 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1395 newval->string, newval->value);
1396 bond->params.arp_all_targets = newval->value;
1397
1398 return 0;
1399}
1400
1401static int bond_option_missed_max_set(struct bonding *bond,
1402 const struct bond_opt_value *newval)
1403{
1404 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1405 newval->string, newval->value);
1406 bond->params.missed_max = newval->value;
1407
1408 return 0;
1409}
1410
1411static int bond_option_prio_set(struct bonding *bond,
1412 const struct bond_opt_value *newval)
1413{
1414 struct slave *slave;
1415
1416 slave = bond_slave_get_rtnl(newval->slave_dev);
1417 if (!slave) {
1418 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1419 return -ENODEV;
1420 }
1421 slave->prio = newval->value;
1422
1423 if (rtnl_dereference(bond->primary_slave))
1424 slave_warn(bond->dev, slave->dev,
1425 "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1426 else
1427 bond_select_active_slave(bond);
1428
1429 return 0;
1430}
1431
1432static int bond_option_primary_set(struct bonding *bond,
1433 const struct bond_opt_value *newval)
1434{
1435 char *p, *primary = newval->string;
1436 struct list_head *iter;
1437 struct slave *slave;
1438
1439 block_netpoll_tx();
1440
1441 p = strchr(primary, '\n');
1442 if (p)
1443 *p = '\0';
1444 /* check to see if we are clearing primary */
1445 if (!strlen(primary)) {
1446 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1447 RCU_INIT_POINTER(bond->primary_slave, NULL);
1448 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1449 bond_select_active_slave(bond);
1450 goto out;
1451 }
1452
1453 bond_for_each_slave(bond, slave, iter) {
1454 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1455 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1456 rcu_assign_pointer(bond->primary_slave, slave);
1457 strcpy(bond->params.primary, slave->dev->name);
1458 bond->force_primary = true;
1459 bond_select_active_slave(bond);
1460 goto out;
1461 }
1462 }
1463
1464 if (rtnl_dereference(bond->primary_slave)) {
1465 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1466 RCU_INIT_POINTER(bond->primary_slave, NULL);
1467 bond_select_active_slave(bond);
1468 }
1469 strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1470
1471 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1472 primary);
1473
1474out:
1475 unblock_netpoll_tx();
1476
1477 return 0;
1478}
1479
1480static int bond_option_primary_reselect_set(struct bonding *bond,
1481 const struct bond_opt_value *newval)
1482{
1483 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1484 newval->string, newval->value);
1485 bond->params.primary_reselect = newval->value;
1486
1487 block_netpoll_tx();
1488 bond_select_active_slave(bond);
1489 unblock_netpoll_tx();
1490
1491 return 0;
1492}
1493
1494static int bond_option_fail_over_mac_set(struct bonding *bond,
1495 const struct bond_opt_value *newval)
1496{
1497 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1498 newval->string, newval->value);
1499 bond->params.fail_over_mac = newval->value;
1500
1501 return 0;
1502}
1503
1504static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1505 const struct bond_opt_value *newval)
1506{
1507 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1508 newval->string, newval->value);
1509 bond->params.xmit_policy = newval->value;
1510
1511 return 0;
1512}
1513
1514static int bond_option_resend_igmp_set(struct bonding *bond,
1515 const struct bond_opt_value *newval)
1516{
1517 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1518 newval->value);
1519 bond->params.resend_igmp = newval->value;
1520
1521 return 0;
1522}
1523
1524static int bond_option_num_peer_notif_set(struct bonding *bond,
1525 const struct bond_opt_value *newval)
1526{
1527 bond->params.num_peer_notif = newval->value;
1528
1529 return 0;
1530}
1531
1532static int bond_option_all_slaves_active_set(struct bonding *bond,
1533 const struct bond_opt_value *newval)
1534{
1535 struct list_head *iter;
1536 struct slave *slave;
1537
1538 if (newval->value == bond->params.all_slaves_active)
1539 return 0;
1540 bond->params.all_slaves_active = newval->value;
1541 bond_for_each_slave(bond, slave, iter) {
1542 if (!bond_is_active_slave(slave)) {
1543 if (newval->value)
1544 slave->inactive = 0;
1545 else
1546 slave->inactive = 1;
1547 }
1548 }
1549
1550 return 0;
1551}
1552
1553static int bond_option_min_links_set(struct bonding *bond,
1554 const struct bond_opt_value *newval)
1555{
1556 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1557 newval->value);
1558 bond->params.min_links = newval->value;
1559 bond_set_carrier(bond);
1560
1561 return 0;
1562}
1563
1564static int bond_option_lp_interval_set(struct bonding *bond,
1565 const struct bond_opt_value *newval)
1566{
1567 bond->params.lp_interval = newval->value;
1568
1569 return 0;
1570}
1571
1572static int bond_option_pps_set(struct bonding *bond,
1573 const struct bond_opt_value *newval)
1574{
1575 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1576 newval->value);
1577 bond->params.packets_per_slave = newval->value;
1578 if (newval->value > 0) {
1579 bond->params.reciprocal_packets_per_slave =
1580 reciprocal_value(newval->value);
1581 } else {
1582 /* reciprocal_packets_per_slave is unused if
1583 * packets_per_slave is 0 or 1, just initialize it
1584 */
1585 bond->params.reciprocal_packets_per_slave =
1586 (struct reciprocal_value) { 0 };
1587 }
1588
1589 return 0;
1590}
1591
1592static int bond_option_lacp_active_set(struct bonding *bond,
1593 const struct bond_opt_value *newval)
1594{
1595 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1596 newval->string, newval->value);
1597 bond->params.lacp_active = newval->value;
1598
1599 return 0;
1600}
1601
1602static int bond_option_lacp_rate_set(struct bonding *bond,
1603 const struct bond_opt_value *newval)
1604{
1605 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1606 newval->string, newval->value);
1607 bond->params.lacp_fast = newval->value;
1608 bond_3ad_update_lacp_rate(bond);
1609
1610 return 0;
1611}
1612
1613static int bond_option_ad_select_set(struct bonding *bond,
1614 const struct bond_opt_value *newval)
1615{
1616 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1617 newval->string, newval->value);
1618 bond->params.ad_select = newval->value;
1619
1620 return 0;
1621}
1622
1623static int bond_option_queue_id_set(struct bonding *bond,
1624 const struct bond_opt_value *newval)
1625{
1626 struct slave *slave, *update_slave;
1627 struct net_device *sdev;
1628 struct list_head *iter;
1629 char *delim;
1630 int ret = 0;
1631 u16 qid;
1632
1633 /* delim will point to queue id if successful */
1634 delim = strchr(newval->string, ':');
1635 if (!delim)
1636 goto err_no_cmd;
1637
1638 /* Terminate string that points to device name and bump it
1639 * up one, so we can read the queue id there.
1640 */
1641 *delim = '\0';
1642 if (sscanf(++delim, "%hd\n", &qid) != 1)
1643 goto err_no_cmd;
1644
1645 /* Check buffer length, valid ifname and queue id */
1646 if (!dev_valid_name(newval->string) ||
1647 qid > bond->dev->real_num_tx_queues)
1648 goto err_no_cmd;
1649
1650 /* Get the pointer to that interface if it exists */
1651 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1652 if (!sdev)
1653 goto err_no_cmd;
1654
1655 /* Search for thes slave and check for duplicate qids */
1656 update_slave = NULL;
1657 bond_for_each_slave(bond, slave, iter) {
1658 if (sdev == slave->dev)
1659 /* We don't need to check the matching
1660 * slave for dups, since we're overwriting it
1661 */
1662 update_slave = slave;
1663 else if (qid && qid == slave->queue_id) {
1664 goto err_no_cmd;
1665 }
1666 }
1667
1668 if (!update_slave)
1669 goto err_no_cmd;
1670
1671 /* Actually set the qids for the slave */
1672 WRITE_ONCE(update_slave->queue_id, qid);
1673
1674out:
1675 return ret;
1676
1677err_no_cmd:
1678 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1679 ret = -EPERM;
1680 goto out;
1681
1682}
1683
1684static int bond_option_slaves_set(struct bonding *bond,
1685 const struct bond_opt_value *newval)
1686{
1687 char command[IFNAMSIZ + 1] = { 0, };
1688 struct net_device *dev;
1689 char *ifname;
1690 int ret;
1691
1692 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1693 ifname = command + 1;
1694 if ((strlen(command) <= 1) ||
1695 (command[0] != '+' && command[0] != '-') ||
1696 !dev_valid_name(ifname))
1697 goto err_no_cmd;
1698
1699 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1700 if (!dev) {
1701 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1702 ifname);
1703 ret = -ENODEV;
1704 goto out;
1705 }
1706
1707 switch (command[0]) {
1708 case '+':
1709 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1710 ret = bond_enslave(bond->dev, dev, NULL);
1711 break;
1712
1713 case '-':
1714 slave_dbg(bond->dev, dev, "Releasing interface\n");
1715 ret = bond_release(bond->dev, dev);
1716 break;
1717
1718 default:
1719 /* should not run here. */
1720 goto err_no_cmd;
1721 }
1722
1723out:
1724 return ret;
1725
1726err_no_cmd:
1727 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1728 ret = -EPERM;
1729 goto out;
1730}
1731
1732static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1733 const struct bond_opt_value *newval)
1734{
1735 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1736 newval->string, newval->value);
1737 bond->params.tlb_dynamic_lb = newval->value;
1738
1739 return 0;
1740}
1741
1742static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1743 const struct bond_opt_value *newval)
1744{
1745 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1746 newval->value);
1747
1748 bond->params.ad_actor_sys_prio = newval->value;
1749 bond_3ad_update_ad_actor_settings(bond);
1750
1751 return 0;
1752}
1753
1754static int bond_option_ad_actor_system_set(struct bonding *bond,
1755 const struct bond_opt_value *newval)
1756{
1757 u8 macaddr[ETH_ALEN];
1758 u8 *mac;
1759
1760 if (newval->string) {
1761 if (!mac_pton(newval->string, macaddr))
1762 goto err;
1763 mac = macaddr;
1764 } else {
1765 mac = (u8 *)&newval->value;
1766 }
1767
1768 if (is_multicast_ether_addr(mac))
1769 goto err;
1770
1771 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1772 ether_addr_copy(bond->params.ad_actor_system, mac);
1773 bond_3ad_update_ad_actor_settings(bond);
1774
1775 return 0;
1776
1777err:
1778 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1779 return -EINVAL;
1780}
1781
1782static int bond_option_ad_user_port_key_set(struct bonding *bond,
1783 const struct bond_opt_value *newval)
1784{
1785 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1786 newval->value);
1787
1788 bond->params.ad_user_port_key = newval->value;
1789 return 0;
1790}
1791
1792static int bond_option_coupled_control_set(struct bonding *bond,
1793 const struct bond_opt_value *newval)
1794{
1795 netdev_info(bond->dev, "Setting coupled_control to %s (%llu)\n",
1796 newval->string, newval->value);
1797
1798 bond->params.coupled_control = newval->value;
1799 return 0;
1800}