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
20 static int bond_option_active_slave_set(struct bonding *bond,
21 const struct bond_opt_value *newval);
22 static int bond_option_miimon_set(struct bonding *bond,
23 const struct bond_opt_value *newval);
24 static int bond_option_updelay_set(struct bonding *bond,
25 const struct bond_opt_value *newval);
26 static int bond_option_downdelay_set(struct bonding *bond,
27 const struct bond_opt_value *newval);
28 static int bond_option_peer_notif_delay_set(struct bonding *bond,
29 const struct bond_opt_value *newval);
30 static int bond_option_use_carrier_set(struct bonding *bond,
31 const struct bond_opt_value *newval);
32 static int bond_option_arp_interval_set(struct bonding *bond,
33 const struct bond_opt_value *newval);
34 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
35 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
36 static int bond_option_arp_ip_targets_set(struct bonding *bond,
37 const struct bond_opt_value *newval);
38 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
39 const struct bond_opt_value *newval);
40 static int bond_option_arp_validate_set(struct bonding *bond,
41 const struct bond_opt_value *newval);
42 static int bond_option_arp_all_targets_set(struct bonding *bond,
43 const struct bond_opt_value *newval);
44 static int bond_option_prio_set(struct bonding *bond,
45 const struct bond_opt_value *newval);
46 static int bond_option_primary_set(struct bonding *bond,
47 const struct bond_opt_value *newval);
48 static int bond_option_primary_reselect_set(struct bonding *bond,
49 const struct bond_opt_value *newval);
50 static int bond_option_fail_over_mac_set(struct bonding *bond,
51 const struct bond_opt_value *newval);
52 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
53 const struct bond_opt_value *newval);
54 static int bond_option_resend_igmp_set(struct bonding *bond,
55 const struct bond_opt_value *newval);
56 static int bond_option_num_peer_notif_set(struct bonding *bond,
57 const struct bond_opt_value *newval);
58 static int bond_option_all_slaves_active_set(struct bonding *bond,
59 const struct bond_opt_value *newval);
60 static int bond_option_min_links_set(struct bonding *bond,
61 const struct bond_opt_value *newval);
62 static int bond_option_lp_interval_set(struct bonding *bond,
63 const struct bond_opt_value *newval);
64 static int bond_option_pps_set(struct bonding *bond,
65 const struct bond_opt_value *newval);
66 static int bond_option_lacp_active_set(struct bonding *bond,
67 const struct bond_opt_value *newval);
68 static int bond_option_lacp_rate_set(struct bonding *bond,
69 const struct bond_opt_value *newval);
70 static int bond_option_ad_select_set(struct bonding *bond,
71 const struct bond_opt_value *newval);
72 static int bond_option_queue_id_set(struct bonding *bond,
73 const struct bond_opt_value *newval);
74 static int bond_option_mode_set(struct bonding *bond,
75 const struct bond_opt_value *newval);
76 static int bond_option_slaves_set(struct bonding *bond,
77 const struct bond_opt_value *newval);
78 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
79 const struct bond_opt_value *newval);
80 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
81 const struct bond_opt_value *newval);
82 static int bond_option_ad_actor_system_set(struct bonding *bond,
83 const struct bond_opt_value *newval);
84 static int bond_option_ad_user_port_key_set(struct bonding *bond,
85 const struct bond_opt_value *newval);
86 static int bond_option_missed_max_set(struct bonding *bond,
87 const struct bond_opt_value *newval);
88 static int bond_option_coupled_control_set(struct bonding *bond,
89 const struct bond_opt_value *newval);
90
91 static 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
102 static 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
108 static 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
118 static 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
129 static 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
135 static 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
142 static 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
148 static const struct bond_opt_value bond_lacp_active[] = {
149 { "off", 0, 0},
150 { "on", 1, BOND_VALFLAG_DEFAULT},
151 { NULL, -1, 0}
152 };
153
154 static 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
160 static 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
167 static 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
174 static 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
180 static 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
187 static 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
193 static 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
199 static 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
206 static 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
212 static 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
218 static 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
224 static 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
230 static 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
237 static 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
243 static 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 */
bond_opt_get_by_name(const char * name)520 const 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 */
bond_opt_get_val(unsigned int option,u64 val)535 const 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 */
bond_opt_get_flags(const struct bond_option * opt,u32 flagmask)551 static 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 */
bond_opt_check_range(const struct bond_option * opt,u64 val)566 static 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 */
bond_opt_parse(const struct bond_option * opt,struct bond_opt_value * val)588 const 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;
649 out:
650 return ret;
651 }
652
653 /* Check opt's dependencies against bond mode and currently set options */
bond_opt_check_deps(struct bonding * bond,const struct bond_option * opt)654 static 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
bond_opt_dep_print(struct bonding * bond,const struct bond_option * opt,struct nlattr * bad_attr,struct netlink_ext_ack * extack)669 static 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
bond_opt_error_interpret(struct bonding * bond,const struct bond_option * opt,int error,const struct bond_opt_value * val,struct nlattr * bad_attr,struct netlink_ext_ack * extack)687 static 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 */
__bond_opt_set(struct bonding * bond,unsigned int option,struct bond_opt_value * val,struct nlattr * bad_attr,struct netlink_ext_ack * extack)763 int __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);
785 out:
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 */
__bond_opt_set_notify(struct bonding * bond,unsigned int option,struct bond_opt_value * val)802 int __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 */
bond_opt_tryset_rtnl(struct bonding * bond,unsigned int option,char * buf)826 int 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 */
bond_opt_get(unsigned int option)847 const 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
bond_set_xfrm_features(struct bonding * bond)855 static 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
bond_option_mode_set(struct bonding * bond,const struct bond_opt_value * newval)868 static int bond_option_mode_set(struct bonding *bond,
869 const struct bond_opt_value *newval)
870 {
871 if (bond->xdp_prog && !bond_xdp_check(bond, newval->value))
872 return -EOPNOTSUPP;
873
874 if (!bond_mode_uses_arp(newval->value)) {
875 if (bond->params.arp_interval) {
876 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
877 newval->string);
878 /* disable arp monitoring */
879 bond->params.arp_interval = 0;
880 }
881
882 if (!bond->params.miimon) {
883 /* set miimon to default value */
884 bond->params.miimon = BOND_DEFAULT_MIIMON;
885 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
886 bond->params.miimon);
887 }
888 }
889
890 if (newval->value == BOND_MODE_ALB)
891 bond->params.tlb_dynamic_lb = 1;
892
893 /* don't cache arp_validate between modes */
894 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
895 bond->params.mode = newval->value;
896
897 if (bond->dev->reg_state == NETREG_REGISTERED) {
898 bool update = false;
899
900 update |= bond_set_xfrm_features(bond);
901
902 if (update)
903 netdev_update_features(bond->dev);
904 }
905
906 bond_xdp_set_features(bond->dev);
907
908 return 0;
909 }
910
bond_option_active_slave_set(struct bonding * bond,const struct bond_opt_value * newval)911 static int bond_option_active_slave_set(struct bonding *bond,
912 const struct bond_opt_value *newval)
913 {
914 char ifname[IFNAMSIZ] = { 0, };
915 struct net_device *slave_dev;
916 int ret = 0;
917
918 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
919 if (!strlen(ifname) || newval->string[0] == '\n') {
920 slave_dev = NULL;
921 } else {
922 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
923 if (!slave_dev)
924 return -ENODEV;
925 }
926
927 if (slave_dev) {
928 if (!netif_is_bond_slave(slave_dev)) {
929 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
930 return -EINVAL;
931 }
932
933 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
934 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
935 return -EINVAL;
936 }
937 }
938
939 block_netpoll_tx();
940 /* check to see if we are clearing active */
941 if (!slave_dev) {
942 netdev_dbg(bond->dev, "Clearing current active slave\n");
943 bond_change_active_slave(bond, NULL);
944 bond_select_active_slave(bond);
945 } else {
946 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
947 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
948
949 BUG_ON(!new_active);
950
951 if (new_active == old_active) {
952 /* do nothing */
953 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
954 } else {
955 if (old_active && (new_active->link == BOND_LINK_UP) &&
956 bond_slave_is_up(new_active)) {
957 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
958 bond_change_active_slave(bond, new_active);
959 } else {
960 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
961 new_active->dev->name);
962 ret = -EINVAL;
963 }
964 }
965 }
966 unblock_netpoll_tx();
967
968 return ret;
969 }
970
971 /* There are two tricky bits here. First, if MII monitoring is activated, then
972 * we must disable ARP monitoring. Second, if the timer isn't running, we must
973 * start it.
974 */
bond_option_miimon_set(struct bonding * bond,const struct bond_opt_value * newval)975 static int bond_option_miimon_set(struct bonding *bond,
976 const struct bond_opt_value *newval)
977 {
978 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
979 newval->value);
980 bond->params.miimon = newval->value;
981 if (bond->params.updelay)
982 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
983 bond->params.updelay * bond->params.miimon);
984 if (bond->params.downdelay)
985 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
986 bond->params.downdelay * bond->params.miimon);
987 if (bond->params.peer_notif_delay)
988 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
989 bond->params.peer_notif_delay * bond->params.miimon);
990 if (newval->value && bond->params.arp_interval) {
991 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
992 bond->params.arp_interval = 0;
993 if (bond->params.arp_validate)
994 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
995 }
996 if (bond->dev->flags & IFF_UP) {
997 /* If the interface is up, we may need to fire off
998 * the MII timer. If the interface is down, the
999 * timer will get fired off when the open function
1000 * is called.
1001 */
1002 if (!newval->value) {
1003 cancel_delayed_work_sync(&bond->mii_work);
1004 } else {
1005 cancel_delayed_work_sync(&bond->arp_work);
1006 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1007 }
1008 }
1009
1010 return 0;
1011 }
1012
1013 /* Set up, down and peer notification delays. These must be multiples
1014 * of the MII monitoring value, and are stored internally as the
1015 * multiplier. Thus, we must translate to MS for the real world.
1016 */
_bond_option_delay_set(struct bonding * bond,const struct bond_opt_value * newval,const char * name,int * target)1017 static int _bond_option_delay_set(struct bonding *bond,
1018 const struct bond_opt_value *newval,
1019 const char *name,
1020 int *target)
1021 {
1022 int value = newval->value;
1023
1024 if (!bond->params.miimon) {
1025 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
1026 name);
1027 return -EPERM;
1028 }
1029 if ((value % bond->params.miimon) != 0) {
1030 netdev_warn(bond->dev,
1031 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1032 name,
1033 value, bond->params.miimon,
1034 (value / bond->params.miimon) *
1035 bond->params.miimon);
1036 }
1037 *target = value / bond->params.miimon;
1038 netdev_dbg(bond->dev, "Setting %s to %d\n",
1039 name,
1040 *target * bond->params.miimon);
1041
1042 return 0;
1043 }
1044
bond_option_updelay_set(struct bonding * bond,const struct bond_opt_value * newval)1045 static int bond_option_updelay_set(struct bonding *bond,
1046 const struct bond_opt_value *newval)
1047 {
1048 return _bond_option_delay_set(bond, newval, "up delay",
1049 &bond->params.updelay);
1050 }
1051
bond_option_downdelay_set(struct bonding * bond,const struct bond_opt_value * newval)1052 static int bond_option_downdelay_set(struct bonding *bond,
1053 const struct bond_opt_value *newval)
1054 {
1055 return _bond_option_delay_set(bond, newval, "down delay",
1056 &bond->params.downdelay);
1057 }
1058
bond_option_peer_notif_delay_set(struct bonding * bond,const struct bond_opt_value * newval)1059 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1060 const struct bond_opt_value *newval)
1061 {
1062 int ret = _bond_option_delay_set(bond, newval,
1063 "peer notification delay",
1064 &bond->params.peer_notif_delay);
1065 return ret;
1066 }
1067
bond_option_use_carrier_set(struct bonding * bond,const struct bond_opt_value * newval)1068 static int bond_option_use_carrier_set(struct bonding *bond,
1069 const struct bond_opt_value *newval)
1070 {
1071 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n",
1072 newval->value);
1073 bond->params.use_carrier = newval->value;
1074
1075 return 0;
1076 }
1077
1078 /* There are two tricky bits here. First, if ARP monitoring is activated, then
1079 * we must disable MII monitoring. Second, if the ARP timer isn't running,
1080 * we must start it.
1081 */
bond_option_arp_interval_set(struct bonding * bond,const struct bond_opt_value * newval)1082 static int bond_option_arp_interval_set(struct bonding *bond,
1083 const struct bond_opt_value *newval)
1084 {
1085 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1086 newval->value);
1087 bond->params.arp_interval = newval->value;
1088 if (newval->value) {
1089 if (bond->params.miimon) {
1090 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1091 bond->params.miimon = 0;
1092 }
1093 if (!bond->params.arp_targets[0])
1094 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1095 }
1096 if (bond->dev->flags & IFF_UP) {
1097 /* If the interface is up, we may need to fire off
1098 * the ARP timer. If the interface is down, the
1099 * timer will get fired off when the open function
1100 * is called.
1101 */
1102 if (!newval->value) {
1103 if (bond->params.arp_validate)
1104 bond->recv_probe = NULL;
1105 cancel_delayed_work_sync(&bond->arp_work);
1106 } else {
1107 /* arp_validate can be set only in active-backup mode */
1108 bond->recv_probe = bond_rcv_validate;
1109 cancel_delayed_work_sync(&bond->mii_work);
1110 queue_delayed_work(bond->wq, &bond->arp_work, 0);
1111 }
1112 }
1113
1114 return 0;
1115 }
1116
_bond_options_arp_ip_target_set(struct bonding * bond,int slot,__be32 target,unsigned long last_rx)1117 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1118 __be32 target,
1119 unsigned long last_rx)
1120 {
1121 __be32 *targets = bond->params.arp_targets;
1122 struct list_head *iter;
1123 struct slave *slave;
1124
1125 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1126 bond_for_each_slave(bond, slave, iter)
1127 slave->target_last_arp_rx[slot] = last_rx;
1128 targets[slot] = target;
1129 }
1130 }
1131
_bond_option_arp_ip_target_add(struct bonding * bond,__be32 target)1132 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1133 {
1134 __be32 *targets = bond->params.arp_targets;
1135 int ind;
1136
1137 if (!bond_is_ip_target_ok(target)) {
1138 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1139 &target);
1140 return -EINVAL;
1141 }
1142
1143 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1144 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1145 &target);
1146 return -EINVAL;
1147 }
1148
1149 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1150 if (ind == -1) {
1151 netdev_err(bond->dev, "ARP target table is full!\n");
1152 return -EINVAL;
1153 }
1154
1155 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1156
1157 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1158
1159 return 0;
1160 }
1161
bond_option_arp_ip_target_add(struct bonding * bond,__be32 target)1162 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1163 {
1164 return _bond_option_arp_ip_target_add(bond, target);
1165 }
1166
bond_option_arp_ip_target_rem(struct bonding * bond,__be32 target)1167 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1168 {
1169 __be32 *targets = bond->params.arp_targets;
1170 struct list_head *iter;
1171 struct slave *slave;
1172 unsigned long *targets_rx;
1173 int ind, i;
1174
1175 if (!bond_is_ip_target_ok(target)) {
1176 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1177 &target);
1178 return -EINVAL;
1179 }
1180
1181 ind = bond_get_targets_ip(targets, target);
1182 if (ind == -1) {
1183 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1184 &target);
1185 return -EINVAL;
1186 }
1187
1188 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1189 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1190
1191 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1192
1193 bond_for_each_slave(bond, slave, iter) {
1194 targets_rx = slave->target_last_arp_rx;
1195 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1196 targets_rx[i] = targets_rx[i+1];
1197 targets_rx[i] = 0;
1198 }
1199 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1200 targets[i] = targets[i+1];
1201 targets[i] = 0;
1202
1203 return 0;
1204 }
1205
bond_option_arp_ip_targets_clear(struct bonding * bond)1206 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1207 {
1208 int i;
1209
1210 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1211 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1212 }
1213
bond_option_arp_ip_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1214 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1215 const struct bond_opt_value *newval)
1216 {
1217 int ret = -EPERM;
1218 __be32 target;
1219
1220 if (newval->string) {
1221 if (strlen(newval->string) < 1 ||
1222 !in4_pton(newval->string + 1, -1, (u8 *)&target, -1, NULL)) {
1223 netdev_err(bond->dev, "invalid ARP target specified\n");
1224 return ret;
1225 }
1226 if (newval->string[0] == '+')
1227 ret = bond_option_arp_ip_target_add(bond, target);
1228 else if (newval->string[0] == '-')
1229 ret = bond_option_arp_ip_target_rem(bond, target);
1230 else
1231 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1232 } else {
1233 target = newval->value;
1234 ret = bond_option_arp_ip_target_add(bond, target);
1235 }
1236
1237 return ret;
1238 }
1239
1240 #if IS_ENABLED(CONFIG_IPV6)
slave_can_set_ns_maddr(const struct bonding * bond,struct slave * slave)1241 static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave)
1242 {
1243 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
1244 !bond_is_active_slave(slave) &&
1245 slave->dev->flags & IFF_MULTICAST;
1246 }
1247
1248 /**
1249 * slave_set_ns_maddrs - add/del all NS mac addresses for slave
1250 * @bond: bond device
1251 * @slave: slave device
1252 * @add: add or remove all the NS mac addresses
1253 *
1254 * This function tries to add or delete all the NS mac addresses on the slave
1255 *
1256 * Note, the IPv6 NS target address is the unicast address in Neighbor
1257 * Solicitation (NS) message. The dest address of NS message should be
1258 * solicited-node multicast address of the target. The dest mac of NS message
1259 * is converted from the solicited-node multicast address.
1260 *
1261 * This function is called when
1262 * * arp_validate changes
1263 * * enslaving, releasing new slaves
1264 */
slave_set_ns_maddrs(struct bonding * bond,struct slave * slave,bool add)1265 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add)
1266 {
1267 struct in6_addr *targets = bond->params.ns_targets;
1268 char slot_maddr[MAX_ADDR_LEN];
1269 struct in6_addr mcaddr;
1270 int i;
1271
1272 if (!slave_can_set_ns_maddr(bond, slave))
1273 return;
1274
1275 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
1276 if (ipv6_addr_any(&targets[i]))
1277 break;
1278
1279 addrconf_addr_solict_mult(&targets[i], &mcaddr);
1280 if (!ndisc_mc_map(&mcaddr, slot_maddr, slave->dev, 0)) {
1281 if (add)
1282 dev_mc_add(slave->dev, slot_maddr);
1283 else
1284 dev_mc_del(slave->dev, slot_maddr);
1285 }
1286 }
1287 }
1288
bond_slave_ns_maddrs_add(struct bonding * bond,struct slave * slave)1289 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave)
1290 {
1291 if (!bond->params.arp_validate)
1292 return;
1293 slave_set_ns_maddrs(bond, slave, true);
1294 }
1295
bond_slave_ns_maddrs_del(struct bonding * bond,struct slave * slave)1296 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave)
1297 {
1298 if (!bond->params.arp_validate)
1299 return;
1300 slave_set_ns_maddrs(bond, slave, false);
1301 }
1302
1303 /**
1304 * slave_set_ns_maddr - set new NS mac address for slave
1305 * @bond: bond device
1306 * @slave: slave device
1307 * @target: the new IPv6 target
1308 * @slot: the old IPv6 target in the slot
1309 *
1310 * This function tries to replace the old mac address to new one on the slave.
1311 *
1312 * Note, the target/slot IPv6 address is the unicast address in Neighbor
1313 * Solicitation (NS) message. The dest address of NS message should be
1314 * solicited-node multicast address of the target. The dest mac of NS message
1315 * is converted from the solicited-node multicast address.
1316 *
1317 * This function is called when
1318 * * An IPv6 NS target is added or removed.
1319 */
slave_set_ns_maddr(struct bonding * bond,struct slave * slave,struct in6_addr * target,struct in6_addr * slot)1320 static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave,
1321 struct in6_addr *target, struct in6_addr *slot)
1322 {
1323 char mac_addr[MAX_ADDR_LEN];
1324 struct in6_addr mcast_addr;
1325
1326 if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave))
1327 return;
1328
1329 /* remove the previous mac addr from slave */
1330 addrconf_addr_solict_mult(slot, &mcast_addr);
1331 if (!ipv6_addr_any(slot) &&
1332 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0))
1333 dev_mc_del(slave->dev, mac_addr);
1334
1335 /* add new mac addr on slave if target is set */
1336 addrconf_addr_solict_mult(target, &mcast_addr);
1337 if (!ipv6_addr_any(target) &&
1338 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0))
1339 dev_mc_add(slave->dev, mac_addr);
1340 }
1341
_bond_options_ns_ip6_target_set(struct bonding * bond,int slot,struct in6_addr * target,unsigned long last_rx)1342 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1343 struct in6_addr *target,
1344 unsigned long last_rx)
1345 {
1346 struct in6_addr *targets = bond->params.ns_targets;
1347 struct list_head *iter;
1348 struct slave *slave;
1349
1350 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1351 bond_for_each_slave(bond, slave, iter) {
1352 slave->target_last_arp_rx[slot] = last_rx;
1353 slave_set_ns_maddr(bond, slave, target, &targets[slot]);
1354 }
1355 targets[slot] = *target;
1356 }
1357 }
1358
bond_option_ns_ip6_targets_clear(struct bonding * bond)1359 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1360 {
1361 struct in6_addr addr_any = in6addr_any;
1362 int i;
1363
1364 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1365 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1366 }
1367
bond_option_ns_ip6_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1368 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1369 const struct bond_opt_value *newval)
1370 {
1371 struct in6_addr *target = (struct in6_addr *)newval->extra;
1372 struct in6_addr *targets = bond->params.ns_targets;
1373 struct in6_addr addr_any = in6addr_any;
1374 int index;
1375
1376 if (!bond_is_ip6_target_ok(target)) {
1377 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1378 target);
1379 return -EINVAL;
1380 }
1381
1382 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1383 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1384 target);
1385 return -EINVAL;
1386 }
1387
1388 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1389 if (index == -1) {
1390 netdev_err(bond->dev, "NS target table is full!\n");
1391 return -EINVAL;
1392 }
1393
1394 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1395
1396 _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1397
1398 return 0;
1399 }
1400 #else
bond_option_ns_ip6_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1401 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1402 const struct bond_opt_value *newval)
1403 {
1404 return -EPERM;
1405 }
1406
slave_set_ns_maddrs(struct bonding * bond,struct slave * slave,bool add)1407 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {}
1408
bond_slave_ns_maddrs_add(struct bonding * bond,struct slave * slave)1409 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {}
1410
bond_slave_ns_maddrs_del(struct bonding * bond,struct slave * slave)1411 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {}
1412 #endif
1413
bond_option_arp_validate_set(struct bonding * bond,const struct bond_opt_value * newval)1414 static int bond_option_arp_validate_set(struct bonding *bond,
1415 const struct bond_opt_value *newval)
1416 {
1417 bool changed = !!bond->params.arp_validate != !!newval->value;
1418 struct list_head *iter;
1419 struct slave *slave;
1420
1421 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1422 newval->string, newval->value);
1423 bond->params.arp_validate = newval->value;
1424
1425 if (changed) {
1426 bond_for_each_slave(bond, slave, iter)
1427 slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate);
1428 }
1429
1430 return 0;
1431 }
1432
bond_option_arp_all_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1433 static int bond_option_arp_all_targets_set(struct bonding *bond,
1434 const struct bond_opt_value *newval)
1435 {
1436 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1437 newval->string, newval->value);
1438 bond->params.arp_all_targets = newval->value;
1439
1440 return 0;
1441 }
1442
bond_option_missed_max_set(struct bonding * bond,const struct bond_opt_value * newval)1443 static int bond_option_missed_max_set(struct bonding *bond,
1444 const struct bond_opt_value *newval)
1445 {
1446 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1447 newval->string, newval->value);
1448 bond->params.missed_max = newval->value;
1449
1450 return 0;
1451 }
1452
bond_option_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1453 static int bond_option_prio_set(struct bonding *bond,
1454 const struct bond_opt_value *newval)
1455 {
1456 struct slave *slave;
1457
1458 slave = bond_slave_get_rtnl(newval->slave_dev);
1459 if (!slave) {
1460 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1461 return -ENODEV;
1462 }
1463 slave->prio = newval->value;
1464
1465 if (rtnl_dereference(bond->primary_slave))
1466 slave_warn(bond->dev, slave->dev,
1467 "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1468 else
1469 bond_select_active_slave(bond);
1470
1471 return 0;
1472 }
1473
bond_option_primary_set(struct bonding * bond,const struct bond_opt_value * newval)1474 static int bond_option_primary_set(struct bonding *bond,
1475 const struct bond_opt_value *newval)
1476 {
1477 char *p, *primary = newval->string;
1478 struct list_head *iter;
1479 struct slave *slave;
1480
1481 block_netpoll_tx();
1482
1483 p = strchr(primary, '\n');
1484 if (p)
1485 *p = '\0';
1486 /* check to see if we are clearing primary */
1487 if (!strlen(primary)) {
1488 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1489 RCU_INIT_POINTER(bond->primary_slave, NULL);
1490 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1491 bond_select_active_slave(bond);
1492 goto out;
1493 }
1494
1495 bond_for_each_slave(bond, slave, iter) {
1496 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1497 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1498 rcu_assign_pointer(bond->primary_slave, slave);
1499 strcpy(bond->params.primary, slave->dev->name);
1500 bond->force_primary = true;
1501 bond_select_active_slave(bond);
1502 goto out;
1503 }
1504 }
1505
1506 if (rtnl_dereference(bond->primary_slave)) {
1507 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1508 RCU_INIT_POINTER(bond->primary_slave, NULL);
1509 bond_select_active_slave(bond);
1510 }
1511 strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1512
1513 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1514 primary);
1515
1516 out:
1517 unblock_netpoll_tx();
1518
1519 return 0;
1520 }
1521
bond_option_primary_reselect_set(struct bonding * bond,const struct bond_opt_value * newval)1522 static int bond_option_primary_reselect_set(struct bonding *bond,
1523 const struct bond_opt_value *newval)
1524 {
1525 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1526 newval->string, newval->value);
1527 bond->params.primary_reselect = newval->value;
1528
1529 block_netpoll_tx();
1530 bond_select_active_slave(bond);
1531 unblock_netpoll_tx();
1532
1533 return 0;
1534 }
1535
bond_option_fail_over_mac_set(struct bonding * bond,const struct bond_opt_value * newval)1536 static int bond_option_fail_over_mac_set(struct bonding *bond,
1537 const struct bond_opt_value *newval)
1538 {
1539 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1540 newval->string, newval->value);
1541 bond->params.fail_over_mac = newval->value;
1542
1543 return 0;
1544 }
1545
bond_option_xmit_hash_policy_set(struct bonding * bond,const struct bond_opt_value * newval)1546 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1547 const struct bond_opt_value *newval)
1548 {
1549 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1550 newval->string, newval->value);
1551 bond->params.xmit_policy = newval->value;
1552
1553 return 0;
1554 }
1555
bond_option_resend_igmp_set(struct bonding * bond,const struct bond_opt_value * newval)1556 static int bond_option_resend_igmp_set(struct bonding *bond,
1557 const struct bond_opt_value *newval)
1558 {
1559 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1560 newval->value);
1561 bond->params.resend_igmp = newval->value;
1562
1563 return 0;
1564 }
1565
bond_option_num_peer_notif_set(struct bonding * bond,const struct bond_opt_value * newval)1566 static int bond_option_num_peer_notif_set(struct bonding *bond,
1567 const struct bond_opt_value *newval)
1568 {
1569 bond->params.num_peer_notif = newval->value;
1570
1571 return 0;
1572 }
1573
bond_option_all_slaves_active_set(struct bonding * bond,const struct bond_opt_value * newval)1574 static int bond_option_all_slaves_active_set(struct bonding *bond,
1575 const struct bond_opt_value *newval)
1576 {
1577 struct list_head *iter;
1578 struct slave *slave;
1579
1580 if (newval->value == bond->params.all_slaves_active)
1581 return 0;
1582 bond->params.all_slaves_active = newval->value;
1583 bond_for_each_slave(bond, slave, iter) {
1584 if (!bond_is_active_slave(slave)) {
1585 if (newval->value)
1586 slave->inactive = 0;
1587 else
1588 slave->inactive = 1;
1589 }
1590 }
1591
1592 return 0;
1593 }
1594
bond_option_min_links_set(struct bonding * bond,const struct bond_opt_value * newval)1595 static int bond_option_min_links_set(struct bonding *bond,
1596 const struct bond_opt_value *newval)
1597 {
1598 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1599 newval->value);
1600 bond->params.min_links = newval->value;
1601 bond_set_carrier(bond);
1602
1603 return 0;
1604 }
1605
bond_option_lp_interval_set(struct bonding * bond,const struct bond_opt_value * newval)1606 static int bond_option_lp_interval_set(struct bonding *bond,
1607 const struct bond_opt_value *newval)
1608 {
1609 bond->params.lp_interval = newval->value;
1610
1611 return 0;
1612 }
1613
bond_option_pps_set(struct bonding * bond,const struct bond_opt_value * newval)1614 static int bond_option_pps_set(struct bonding *bond,
1615 const struct bond_opt_value *newval)
1616 {
1617 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1618 newval->value);
1619 bond->params.packets_per_slave = newval->value;
1620 if (newval->value > 0) {
1621 bond->params.reciprocal_packets_per_slave =
1622 reciprocal_value(newval->value);
1623 } else {
1624 /* reciprocal_packets_per_slave is unused if
1625 * packets_per_slave is 0 or 1, just initialize it
1626 */
1627 bond->params.reciprocal_packets_per_slave =
1628 (struct reciprocal_value) { 0 };
1629 }
1630
1631 return 0;
1632 }
1633
bond_option_lacp_active_set(struct bonding * bond,const struct bond_opt_value * newval)1634 static int bond_option_lacp_active_set(struct bonding *bond,
1635 const struct bond_opt_value *newval)
1636 {
1637 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1638 newval->string, newval->value);
1639 bond->params.lacp_active = newval->value;
1640
1641 return 0;
1642 }
1643
bond_option_lacp_rate_set(struct bonding * bond,const struct bond_opt_value * newval)1644 static int bond_option_lacp_rate_set(struct bonding *bond,
1645 const struct bond_opt_value *newval)
1646 {
1647 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1648 newval->string, newval->value);
1649 bond->params.lacp_fast = newval->value;
1650 bond_3ad_update_lacp_rate(bond);
1651
1652 return 0;
1653 }
1654
bond_option_ad_select_set(struct bonding * bond,const struct bond_opt_value * newval)1655 static int bond_option_ad_select_set(struct bonding *bond,
1656 const struct bond_opt_value *newval)
1657 {
1658 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1659 newval->string, newval->value);
1660 bond->params.ad_select = newval->value;
1661
1662 return 0;
1663 }
1664
bond_option_queue_id_set(struct bonding * bond,const struct bond_opt_value * newval)1665 static int bond_option_queue_id_set(struct bonding *bond,
1666 const struct bond_opt_value *newval)
1667 {
1668 struct slave *slave, *update_slave;
1669 struct net_device *sdev;
1670 struct list_head *iter;
1671 char *delim;
1672 int ret = 0;
1673 u16 qid;
1674
1675 /* delim will point to queue id if successful */
1676 delim = strchr(newval->string, ':');
1677 if (!delim)
1678 goto err_no_cmd;
1679
1680 /* Terminate string that points to device name and bump it
1681 * up one, so we can read the queue id there.
1682 */
1683 *delim = '\0';
1684 if (sscanf(++delim, "%hd\n", &qid) != 1)
1685 goto err_no_cmd;
1686
1687 /* Check buffer length, valid ifname and queue id */
1688 if (!dev_valid_name(newval->string) ||
1689 qid > bond->dev->real_num_tx_queues)
1690 goto err_no_cmd;
1691
1692 /* Get the pointer to that interface if it exists */
1693 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1694 if (!sdev)
1695 goto err_no_cmd;
1696
1697 /* Search for thes slave and check for duplicate qids */
1698 update_slave = NULL;
1699 bond_for_each_slave(bond, slave, iter) {
1700 if (sdev == slave->dev)
1701 /* We don't need to check the matching
1702 * slave for dups, since we're overwriting it
1703 */
1704 update_slave = slave;
1705 else if (qid && qid == slave->queue_id) {
1706 goto err_no_cmd;
1707 }
1708 }
1709
1710 if (!update_slave)
1711 goto err_no_cmd;
1712
1713 /* Actually set the qids for the slave */
1714 WRITE_ONCE(update_slave->queue_id, qid);
1715
1716 out:
1717 return ret;
1718
1719 err_no_cmd:
1720 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1721 ret = -EPERM;
1722 goto out;
1723
1724 }
1725
bond_option_slaves_set(struct bonding * bond,const struct bond_opt_value * newval)1726 static int bond_option_slaves_set(struct bonding *bond,
1727 const struct bond_opt_value *newval)
1728 {
1729 char command[IFNAMSIZ + 1] = { 0, };
1730 struct net_device *dev;
1731 char *ifname;
1732 int ret;
1733
1734 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1735 ifname = command + 1;
1736 if ((strlen(command) <= 1) ||
1737 (command[0] != '+' && command[0] != '-') ||
1738 !dev_valid_name(ifname))
1739 goto err_no_cmd;
1740
1741 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1742 if (!dev) {
1743 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1744 ifname);
1745 ret = -ENODEV;
1746 goto out;
1747 }
1748
1749 switch (command[0]) {
1750 case '+':
1751 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1752 ret = bond_enslave(bond->dev, dev, NULL);
1753 break;
1754
1755 case '-':
1756 slave_dbg(bond->dev, dev, "Releasing interface\n");
1757 ret = bond_release(bond->dev, dev);
1758 break;
1759
1760 default:
1761 /* should not run here. */
1762 goto err_no_cmd;
1763 }
1764
1765 out:
1766 return ret;
1767
1768 err_no_cmd:
1769 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1770 ret = -EPERM;
1771 goto out;
1772 }
1773
bond_option_tlb_dynamic_lb_set(struct bonding * bond,const struct bond_opt_value * newval)1774 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1775 const struct bond_opt_value *newval)
1776 {
1777 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1778 newval->string, newval->value);
1779 bond->params.tlb_dynamic_lb = newval->value;
1780
1781 return 0;
1782 }
1783
bond_option_ad_actor_sys_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1784 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1785 const struct bond_opt_value *newval)
1786 {
1787 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1788 newval->value);
1789
1790 bond->params.ad_actor_sys_prio = newval->value;
1791 bond_3ad_update_ad_actor_settings(bond);
1792
1793 return 0;
1794 }
1795
bond_option_ad_actor_system_set(struct bonding * bond,const struct bond_opt_value * newval)1796 static int bond_option_ad_actor_system_set(struct bonding *bond,
1797 const struct bond_opt_value *newval)
1798 {
1799 u8 macaddr[ETH_ALEN];
1800 u8 *mac;
1801
1802 if (newval->string) {
1803 if (!mac_pton(newval->string, macaddr))
1804 goto err;
1805 mac = macaddr;
1806 } else {
1807 mac = (u8 *)&newval->value;
1808 }
1809
1810 if (is_multicast_ether_addr(mac))
1811 goto err;
1812
1813 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1814 ether_addr_copy(bond->params.ad_actor_system, mac);
1815 bond_3ad_update_ad_actor_settings(bond);
1816
1817 return 0;
1818
1819 err:
1820 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1821 return -EINVAL;
1822 }
1823
bond_option_ad_user_port_key_set(struct bonding * bond,const struct bond_opt_value * newval)1824 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1825 const struct bond_opt_value *newval)
1826 {
1827 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1828 newval->value);
1829
1830 bond->params.ad_user_port_key = newval->value;
1831 return 0;
1832 }
1833
bond_option_coupled_control_set(struct bonding * bond,const struct bond_opt_value * newval)1834 static int bond_option_coupled_control_set(struct bonding *bond,
1835 const struct bond_opt_value *newval)
1836 {
1837 netdev_info(bond->dev, "Setting coupled_control to %s (%llu)\n",
1838 newval->string, newval->value);
1839
1840 bond->params.coupled_control = newval->value;
1841 return 0;
1842 }
1843