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_actor_port_prio_set(struct bonding *bond,
83 const struct bond_opt_value *newval);
84 static int bond_option_ad_actor_system_set(struct bonding *bond,
85 const struct bond_opt_value *newval);
86 static int bond_option_ad_user_port_key_set(struct bonding *bond,
87 const struct bond_opt_value *newval);
88 static int bond_option_missed_max_set(struct bonding *bond,
89 const struct bond_opt_value *newval);
90 static int bond_option_coupled_control_set(struct bonding *bond,
91 const struct bond_opt_value *newval);
92 static int bond_option_broadcast_neigh_set(struct bonding *bond,
93 const struct bond_opt_value *newval);
94
95 static const struct bond_opt_value bond_mode_tbl[] = {
96 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
97 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
98 { "balance-xor", BOND_MODE_XOR, 0},
99 { "broadcast", BOND_MODE_BROADCAST, 0},
100 { "802.3ad", BOND_MODE_8023AD, 0},
101 { "balance-tlb", BOND_MODE_TLB, 0},
102 { "balance-alb", BOND_MODE_ALB, 0},
103 { NULL, -1, 0},
104 };
105
106 static const struct bond_opt_value bond_pps_tbl[] = {
107 { "default", 1, BOND_VALFLAG_DEFAULT},
108 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
109 { NULL, -1, 0},
110 };
111
112 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
113 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
114 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
115 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
116 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
117 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
118 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
119 { NULL, -1, 0},
120 };
121
122 static const struct bond_opt_value bond_arp_validate_tbl[] = {
123 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
124 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
125 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
126 { "all", BOND_ARP_VALIDATE_ALL, 0},
127 { "filter", BOND_ARP_FILTER, 0},
128 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
129 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
130 { NULL, -1, 0},
131 };
132
133 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
134 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
135 { "all", BOND_ARP_TARGETS_ALL, 0},
136 { NULL, -1, 0},
137 };
138
139 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
140 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
141 { "active", BOND_FOM_ACTIVE, 0},
142 { "follow", BOND_FOM_FOLLOW, 0},
143 { NULL, -1, 0},
144 };
145
146 static const struct bond_opt_value bond_intmax_tbl[] = {
147 { "off", 0, BOND_VALFLAG_DEFAULT},
148 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
149 { NULL, -1, 0}
150 };
151
152 static const struct bond_opt_value bond_lacp_active[] = {
153 { "off", 0, 0},
154 { "on", 1, BOND_VALFLAG_DEFAULT},
155 { NULL, -1, 0}
156 };
157
158 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
159 { "slow", AD_LACP_SLOW, 0},
160 { "fast", AD_LACP_FAST, 0},
161 { NULL, -1, 0},
162 };
163
164 static const struct bond_opt_value bond_ad_select_tbl[] = {
165 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
166 { "bandwidth", BOND_AD_BANDWIDTH, 0},
167 { "count", BOND_AD_COUNT, 0},
168 { "actor_port_prio", BOND_AD_PRIO, 0},
169 { NULL, -1, 0},
170 };
171
172 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
173 { "off", 0, 0},
174 { "maxval", 255, BOND_VALFLAG_MAX},
175 { "default", 1, BOND_VALFLAG_DEFAULT},
176 { NULL, -1, 0}
177 };
178
179 static const struct bond_opt_value bond_peer_notif_delay_tbl[] = {
180 { "off", 0, 0},
181 { "maxval", 300000, BOND_VALFLAG_MAX},
182 { NULL, -1, 0}
183 };
184
185 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
186 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
187 { "better", BOND_PRI_RESELECT_BETTER, 0},
188 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
189 { NULL, -1},
190 };
191
192 static const struct bond_opt_value bond_use_carrier_tbl[] = {
193 { "on", 1, BOND_VALFLAG_DEFAULT},
194 { NULL, -1, 0}
195 };
196
197 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
198 { "off", 0, BOND_VALFLAG_DEFAULT},
199 { "on", 1, 0},
200 { NULL, -1, 0}
201 };
202
203 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
204 { "off", 0, 0},
205 { "maxval", 255, BOND_VALFLAG_MAX},
206 { "default", 1, BOND_VALFLAG_DEFAULT},
207 { NULL, -1, 0}
208 };
209
210 static const struct bond_opt_value bond_lp_interval_tbl[] = {
211 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
212 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
213 { NULL, -1, 0},
214 };
215
216 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
217 { "off", 0, 0},
218 { "on", 1, BOND_VALFLAG_DEFAULT},
219 { NULL, -1, 0}
220 };
221
222 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
223 { "minval", 1, BOND_VALFLAG_MIN},
224 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
225 { NULL, -1, 0},
226 };
227
228 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
229 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
230 { "maxval", 1023, BOND_VALFLAG_MAX},
231 { NULL, -1, 0},
232 };
233
234 static const struct bond_opt_value bond_missed_max_tbl[] = {
235 { "minval", 1, BOND_VALFLAG_MIN},
236 { "maxval", 255, BOND_VALFLAG_MAX},
237 { "default", 2, BOND_VALFLAG_DEFAULT},
238 { NULL, -1, 0},
239 };
240
241 static const struct bond_opt_value bond_coupled_control_tbl[] = {
242 { "on", 1, BOND_VALFLAG_DEFAULT},
243 { "off", 0, 0},
244 { NULL, -1, 0},
245 };
246
247 static const struct bond_opt_value bond_broadcast_neigh_tbl[] = {
248 { "off", 0, BOND_VALFLAG_DEFAULT},
249 { "on", 1, 0},
250 { NULL, -1, 0}
251 };
252
253 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
254 [BOND_OPT_MODE] = {
255 .id = BOND_OPT_MODE,
256 .name = "mode",
257 .desc = "bond device mode",
258 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
259 .values = bond_mode_tbl,
260 .set = bond_option_mode_set
261 },
262 [BOND_OPT_PACKETS_PER_SLAVE] = {
263 .id = BOND_OPT_PACKETS_PER_SLAVE,
264 .name = "packets_per_slave",
265 .desc = "Packets to send per slave in RR mode",
266 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
267 .values = bond_pps_tbl,
268 .set = bond_option_pps_set
269 },
270 [BOND_OPT_XMIT_HASH] = {
271 .id = BOND_OPT_XMIT_HASH,
272 .name = "xmit_hash_policy",
273 .desc = "balance-xor, 802.3ad, and tlb hashing method",
274 .values = bond_xmit_hashtype_tbl,
275 .set = bond_option_xmit_hash_policy_set
276 },
277 [BOND_OPT_ARP_VALIDATE] = {
278 .id = BOND_OPT_ARP_VALIDATE,
279 .name = "arp_validate",
280 .desc = "validate src/dst of ARP probes",
281 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
282 BIT(BOND_MODE_ALB),
283 .values = bond_arp_validate_tbl,
284 .set = bond_option_arp_validate_set
285 },
286 [BOND_OPT_ARP_ALL_TARGETS] = {
287 .id = BOND_OPT_ARP_ALL_TARGETS,
288 .name = "arp_all_targets",
289 .desc = "fail on any/all arp targets timeout",
290 .values = bond_arp_all_targets_tbl,
291 .set = bond_option_arp_all_targets_set
292 },
293 [BOND_OPT_FAIL_OVER_MAC] = {
294 .id = BOND_OPT_FAIL_OVER_MAC,
295 .name = "fail_over_mac",
296 .desc = "For active-backup, do not set all slaves to the same MAC",
297 .flags = BOND_OPTFLAG_NOSLAVES,
298 .values = bond_fail_over_mac_tbl,
299 .set = bond_option_fail_over_mac_set
300 },
301 [BOND_OPT_ARP_INTERVAL] = {
302 .id = BOND_OPT_ARP_INTERVAL,
303 .name = "arp_interval",
304 .desc = "arp interval in milliseconds",
305 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
306 BIT(BOND_MODE_ALB),
307 .values = bond_intmax_tbl,
308 .set = bond_option_arp_interval_set
309 },
310 [BOND_OPT_MISSED_MAX] = {
311 .id = BOND_OPT_MISSED_MAX,
312 .name = "arp_missed_max",
313 .desc = "Maximum number of missed ARP interval",
314 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
315 BIT(BOND_MODE_ALB),
316 .values = bond_missed_max_tbl,
317 .set = bond_option_missed_max_set
318 },
319 [BOND_OPT_ARP_TARGETS] = {
320 .id = BOND_OPT_ARP_TARGETS,
321 .name = "arp_ip_target",
322 .desc = "arp targets in n.n.n.n form",
323 .flags = BOND_OPTFLAG_RAWVAL,
324 .set = bond_option_arp_ip_targets_set
325 },
326 [BOND_OPT_NS_TARGETS] = {
327 .id = BOND_OPT_NS_TARGETS,
328 .name = "ns_ip6_target",
329 .desc = "NS targets in ffff:ffff::ffff:ffff form",
330 .flags = BOND_OPTFLAG_RAWVAL,
331 .set = bond_option_ns_ip6_targets_set
332 },
333 [BOND_OPT_DOWNDELAY] = {
334 .id = BOND_OPT_DOWNDELAY,
335 .name = "downdelay",
336 .desc = "Delay before considering link down, in milliseconds",
337 .values = bond_intmax_tbl,
338 .set = bond_option_downdelay_set
339 },
340 [BOND_OPT_UPDELAY] = {
341 .id = BOND_OPT_UPDELAY,
342 .name = "updelay",
343 .desc = "Delay before considering link up, in milliseconds",
344 .values = bond_intmax_tbl,
345 .set = bond_option_updelay_set
346 },
347 [BOND_OPT_LACP_ACTIVE] = {
348 .id = BOND_OPT_LACP_ACTIVE,
349 .name = "lacp_active",
350 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
351 .flags = BOND_OPTFLAG_IFDOWN,
352 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
353 .values = bond_lacp_active,
354 .set = bond_option_lacp_active_set
355 },
356 [BOND_OPT_LACP_RATE] = {
357 .id = BOND_OPT_LACP_RATE,
358 .name = "lacp_rate",
359 .desc = "LACPDU tx rate to request from 802.3ad partner",
360 .flags = BOND_OPTFLAG_IFDOWN,
361 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
362 .values = bond_lacp_rate_tbl,
363 .set = bond_option_lacp_rate_set
364 },
365 [BOND_OPT_MINLINKS] = {
366 .id = BOND_OPT_MINLINKS,
367 .name = "min_links",
368 .desc = "Minimum number of available links before turning on carrier",
369 .values = bond_intmax_tbl,
370 .set = bond_option_min_links_set
371 },
372 [BOND_OPT_AD_SELECT] = {
373 .id = BOND_OPT_AD_SELECT,
374 .name = "ad_select",
375 .desc = "802.3ad aggregation selection logic",
376 .flags = BOND_OPTFLAG_IFDOWN,
377 .values = bond_ad_select_tbl,
378 .set = bond_option_ad_select_set
379 },
380 [BOND_OPT_NUM_PEER_NOTIF] = {
381 .id = BOND_OPT_NUM_PEER_NOTIF,
382 .name = "num_unsol_na",
383 .desc = "Number of peer notifications to send on failover event",
384 .values = bond_num_peer_notif_tbl,
385 .set = bond_option_num_peer_notif_set
386 },
387 [BOND_OPT_MIIMON] = {
388 .id = BOND_OPT_MIIMON,
389 .name = "miimon",
390 .desc = "Link check interval in milliseconds",
391 .values = bond_intmax_tbl,
392 .set = bond_option_miimon_set
393 },
394 [BOND_OPT_PRIO] = {
395 .id = BOND_OPT_PRIO,
396 .name = "prio",
397 .desc = "Link priority for failover re-selection",
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_prio_set
403 },
404 [BOND_OPT_PRIMARY] = {
405 .id = BOND_OPT_PRIMARY,
406 .name = "primary",
407 .desc = "Primary network device to use",
408 .flags = BOND_OPTFLAG_RAWVAL,
409 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
410 BIT(BOND_MODE_TLB) |
411 BIT(BOND_MODE_ALB)),
412 .set = bond_option_primary_set
413 },
414 [BOND_OPT_PRIMARY_RESELECT] = {
415 .id = BOND_OPT_PRIMARY_RESELECT,
416 .name = "primary_reselect",
417 .desc = "Reselect primary slave once it comes up",
418 .values = bond_primary_reselect_tbl,
419 .set = bond_option_primary_reselect_set
420 },
421 [BOND_OPT_USE_CARRIER] = {
422 .id = BOND_OPT_USE_CARRIER,
423 .name = "use_carrier",
424 .desc = "option obsolete, use_carrier cannot be disabled",
425 .values = bond_use_carrier_tbl,
426 .set = bond_option_use_carrier_set
427 },
428 [BOND_OPT_ACTIVE_SLAVE] = {
429 .id = BOND_OPT_ACTIVE_SLAVE,
430 .name = "active_slave",
431 .desc = "Currently active slave",
432 .flags = BOND_OPTFLAG_RAWVAL,
433 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
434 BIT(BOND_MODE_TLB) |
435 BIT(BOND_MODE_ALB)),
436 .set = bond_option_active_slave_set
437 },
438 [BOND_OPT_QUEUE_ID] = {
439 .id = BOND_OPT_QUEUE_ID,
440 .name = "queue_id",
441 .desc = "Set queue id of a slave",
442 .flags = BOND_OPTFLAG_RAWVAL,
443 .set = bond_option_queue_id_set
444 },
445 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
446 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
447 .name = "all_slaves_active",
448 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
449 .values = bond_all_slaves_active_tbl,
450 .set = bond_option_all_slaves_active_set
451 },
452 [BOND_OPT_RESEND_IGMP] = {
453 .id = BOND_OPT_RESEND_IGMP,
454 .name = "resend_igmp",
455 .desc = "Number of IGMP membership reports to send on link failure",
456 .values = bond_resend_igmp_tbl,
457 .set = bond_option_resend_igmp_set
458 },
459 [BOND_OPT_LP_INTERVAL] = {
460 .id = BOND_OPT_LP_INTERVAL,
461 .name = "lp_interval",
462 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
463 .values = bond_lp_interval_tbl,
464 .set = bond_option_lp_interval_set
465 },
466 [BOND_OPT_SLAVES] = {
467 .id = BOND_OPT_SLAVES,
468 .name = "slaves",
469 .desc = "Slave membership management",
470 .flags = BOND_OPTFLAG_RAWVAL,
471 .set = bond_option_slaves_set
472 },
473 [BOND_OPT_TLB_DYNAMIC_LB] = {
474 .id = BOND_OPT_TLB_DYNAMIC_LB,
475 .name = "tlb_dynamic_lb",
476 .desc = "Enable dynamic flow shuffling",
477 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
478 .values = bond_tlb_dynamic_lb_tbl,
479 .flags = BOND_OPTFLAG_IFDOWN,
480 .set = bond_option_tlb_dynamic_lb_set,
481 },
482 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
483 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
484 .name = "ad_actor_sys_prio",
485 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
486 .values = bond_ad_actor_sys_prio_tbl,
487 .set = bond_option_ad_actor_sys_prio_set,
488 },
489 [BOND_OPT_ACTOR_PORT_PRIO] = {
490 .id = BOND_OPT_ACTOR_PORT_PRIO,
491 .name = "actor_port_prio",
492 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
493 .flags = BOND_OPTFLAG_RAWVAL,
494 .set = bond_option_actor_port_prio_set,
495 },
496 [BOND_OPT_AD_ACTOR_SYSTEM] = {
497 .id = BOND_OPT_AD_ACTOR_SYSTEM,
498 .name = "ad_actor_system",
499 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
500 .flags = BOND_OPTFLAG_RAWVAL,
501 .set = bond_option_ad_actor_system_set,
502 },
503 [BOND_OPT_AD_USER_PORT_KEY] = {
504 .id = BOND_OPT_AD_USER_PORT_KEY,
505 .name = "ad_user_port_key",
506 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
507 .flags = BOND_OPTFLAG_IFDOWN,
508 .values = bond_ad_user_port_key_tbl,
509 .set = bond_option_ad_user_port_key_set,
510 },
511 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
512 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
513 .name = "num_grat_arp",
514 .desc = "Number of peer notifications to send on failover event",
515 .values = bond_num_peer_notif_tbl,
516 .set = bond_option_num_peer_notif_set
517 },
518 [BOND_OPT_PEER_NOTIF_DELAY] = {
519 .id = BOND_OPT_PEER_NOTIF_DELAY,
520 .name = "peer_notif_delay",
521 .desc = "Delay between each peer notification on failover event, in milliseconds",
522 .values = bond_peer_notif_delay_tbl,
523 .set = bond_option_peer_notif_delay_set
524 },
525 [BOND_OPT_COUPLED_CONTROL] = {
526 .id = BOND_OPT_COUPLED_CONTROL,
527 .name = "coupled_control",
528 .desc = "Opt into using coupled control MUX for LACP states",
529 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
530 .flags = BOND_OPTFLAG_IFDOWN,
531 .values = bond_coupled_control_tbl,
532 .set = bond_option_coupled_control_set,
533 },
534 [BOND_OPT_BROADCAST_NEIGH] = {
535 .id = BOND_OPT_BROADCAST_NEIGH,
536 .name = "broadcast_neighbor",
537 .desc = "Broadcast neighbor packets to all active slaves",
538 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
539 .values = bond_broadcast_neigh_tbl,
540 .set = bond_option_broadcast_neigh_set,
541 }
542 };
543
544 /* Searches for an option by name */
bond_opt_get_by_name(const char * name)545 const struct bond_option *bond_opt_get_by_name(const char *name)
546 {
547 const struct bond_option *opt;
548 int option;
549
550 for (option = 0; option < BOND_OPT_LAST; option++) {
551 opt = bond_opt_get(option);
552 if (opt && !strcmp(opt->name, name))
553 return opt;
554 }
555
556 return NULL;
557 }
558
559 /* Searches for a value in opt's values[] table */
bond_opt_get_val(unsigned int option,u64 val)560 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
561 {
562 const struct bond_option *opt;
563 int i;
564
565 opt = bond_opt_get(option);
566 if (WARN_ON(!opt))
567 return NULL;
568 for (i = 0; opt->values && opt->values[i].string; i++)
569 if (opt->values[i].value == val)
570 return &opt->values[i];
571
572 return NULL;
573 }
574
575 /* Searches for a value in opt's values[] table which matches the flagmask */
bond_opt_get_flags(const struct bond_option * opt,u32 flagmask)576 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
577 u32 flagmask)
578 {
579 int i;
580
581 for (i = 0; opt->values && opt->values[i].string; i++)
582 if (opt->values[i].flags & flagmask)
583 return &opt->values[i];
584
585 return NULL;
586 }
587
588 /* If maxval is missing then there's no range to check. In case minval is
589 * missing then it's considered to be 0.
590 */
bond_opt_check_range(const struct bond_option * opt,u64 val)591 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
592 {
593 const struct bond_opt_value *minval, *maxval;
594
595 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
596 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
597 if (!maxval || (minval && val < minval->value) || val > maxval->value)
598 return false;
599
600 return true;
601 }
602
603 /**
604 * bond_opt_parse - parse option value
605 * @opt: the option to parse against
606 * @val: value to parse
607 *
608 * This function tries to extract the value from @val and check if it's
609 * a possible match for the option and returns NULL if a match isn't found,
610 * or the struct_opt_value that matched. It also strips the new line from
611 * @val->string if it's present.
612 */
bond_opt_parse(const struct bond_option * opt,struct bond_opt_value * val)613 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
614 struct bond_opt_value *val)
615 {
616 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
617 const struct bond_opt_value *tbl;
618 const struct bond_opt_value *ret = NULL;
619 bool checkval;
620 int i, rv;
621
622 /* No parsing if the option wants a raw val */
623 if (opt->flags & BOND_OPTFLAG_RAWVAL)
624 return val;
625
626 tbl = opt->values;
627 if (!tbl)
628 goto out;
629
630 /* ULLONG_MAX is used to bypass string processing */
631 checkval = val->value != ULLONG_MAX;
632 if (!checkval) {
633 if (!val->string)
634 goto out;
635 p = strchr(val->string, '\n');
636 if (p)
637 *p = '\0';
638 for (p = val->string; *p; p++)
639 if (!(isdigit(*p) || isspace(*p)))
640 break;
641 /* The following code extracts the string to match or the value
642 * and sets checkval appropriately
643 */
644 if (*p) {
645 rv = sscanf(val->string, "%32s", valstr);
646 } else {
647 rv = sscanf(val->string, "%llu", &val->value);
648 checkval = true;
649 }
650 if (!rv)
651 goto out;
652 }
653
654 for (i = 0; tbl[i].string; i++) {
655 /* Check for exact match */
656 if (checkval) {
657 if (val->value == tbl[i].value)
658 ret = &tbl[i];
659 } else {
660 if (!strcmp(valstr, "default") &&
661 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
662 ret = &tbl[i];
663
664 if (!strcmp(valstr, tbl[i].string))
665 ret = &tbl[i];
666 }
667 /* Found an exact match */
668 if (ret)
669 goto out;
670 }
671 /* Possible range match */
672 if (checkval && bond_opt_check_range(opt, val->value))
673 ret = val;
674 out:
675 return ret;
676 }
677
678 /* Check opt's dependencies against bond mode and currently set options */
bond_opt_check_deps(struct bonding * bond,const struct bond_option * opt)679 static int bond_opt_check_deps(struct bonding *bond,
680 const struct bond_option *opt)
681 {
682 struct bond_params *params = &bond->params;
683
684 if (test_bit(params->mode, &opt->unsuppmodes))
685 return -EACCES;
686 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
687 return -ENOTEMPTY;
688 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
689 return -EBUSY;
690
691 return 0;
692 }
693
bond_opt_dep_print(struct bonding * bond,const struct bond_option * opt,struct nlattr * bad_attr,struct netlink_ext_ack * extack)694 static void bond_opt_dep_print(struct bonding *bond,
695 const struct bond_option *opt,
696 struct nlattr *bad_attr,
697 struct netlink_ext_ack *extack)
698 {
699 const struct bond_opt_value *modeval;
700 struct bond_params *params;
701
702 params = &bond->params;
703 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
704 if (test_bit(params->mode, &opt->unsuppmodes)) {
705 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
706 opt->name, modeval->string, modeval->value);
707 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
708 "option not supported in mode");
709 }
710 }
711
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)712 static void bond_opt_error_interpret(struct bonding *bond,
713 const struct bond_option *opt,
714 int error, const struct bond_opt_value *val,
715 struct nlattr *bad_attr,
716 struct netlink_ext_ack *extack)
717 {
718 const struct bond_opt_value *minval, *maxval;
719 char *p;
720
721 switch (error) {
722 case -EINVAL:
723 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
724 if (val) {
725 if (val->string) {
726 /* sometimes RAWVAL opts may have new lines */
727 p = strchr(val->string, '\n');
728 if (p)
729 *p = '\0';
730 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
731 opt->name, val->string);
732 } else {
733 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
734 opt->name, val->value);
735 }
736 }
737 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
738 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
739 if (!maxval)
740 break;
741 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
742 opt->name, minval ? minval->value : 0, maxval->value);
743 break;
744 case -EACCES:
745 bond_opt_dep_print(bond, opt, bad_attr, extack);
746 break;
747 case -ENOTEMPTY:
748 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
749 "unable to set option because the bond device has slaves");
750 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
751 opt->name);
752 break;
753 case -EBUSY:
754 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
755 "unable to set option because the bond is up");
756 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
757 opt->name);
758 break;
759 case -ENODEV:
760 if (val && val->string) {
761 p = strchr(val->string, '\n');
762 if (p)
763 *p = '\0';
764 netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
765 opt->name, val->string);
766 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
767 "interface does not exist");
768 }
769 break;
770 default:
771 break;
772 }
773 }
774
775 /**
776 * __bond_opt_set - set a bonding option
777 * @bond: target bond device
778 * @option: option to set
779 * @val: value to set it to
780 * @bad_attr: netlink attribue that caused the error
781 * @extack: extended netlink error structure, used when an error message
782 * needs to be returned to the caller via netlink
783 *
784 * This function is used to change the bond's option value, it can be
785 * used for both enabling/changing an option and for disabling it. RTNL lock
786 * must be obtained before calling this function.
787 */
__bond_opt_set(struct bonding * bond,unsigned int option,struct bond_opt_value * val,struct nlattr * bad_attr,struct netlink_ext_ack * extack)788 int __bond_opt_set(struct bonding *bond,
789 unsigned int option, struct bond_opt_value *val,
790 struct nlattr *bad_attr, struct netlink_ext_ack *extack)
791 {
792 const struct bond_opt_value *retval = NULL;
793 const struct bond_option *opt;
794 int ret = -ENOENT;
795
796 ASSERT_RTNL();
797
798 opt = bond_opt_get(option);
799 if (WARN_ON(!val) || WARN_ON(!opt))
800 goto out;
801 ret = bond_opt_check_deps(bond, opt);
802 if (ret)
803 goto out;
804 retval = bond_opt_parse(opt, val);
805 if (!retval) {
806 ret = -EINVAL;
807 goto out;
808 }
809 ret = opt->set(bond, retval);
810 out:
811 if (ret)
812 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
813
814 return ret;
815 }
816 /**
817 * __bond_opt_set_notify - set a bonding option
818 * @bond: target bond device
819 * @option: option to set
820 * @val: value to set it to
821 *
822 * This function is used to change the bond's option value and trigger
823 * a notification to user sapce. It can be used for both enabling/changing
824 * an option and for disabling it. RTNL lock must be obtained before calling
825 * this function.
826 */
__bond_opt_set_notify(struct bonding * bond,unsigned int option,struct bond_opt_value * val)827 int __bond_opt_set_notify(struct bonding *bond,
828 unsigned int option, struct bond_opt_value *val)
829 {
830 int ret;
831
832 ASSERT_RTNL();
833
834 ret = __bond_opt_set(bond, option, val, NULL, NULL);
835
836 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
837 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
838
839 return ret;
840 }
841
842 /**
843 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
844 * @bond: target bond device
845 * @option: option to set
846 * @buf: value to set it to
847 *
848 * This function tries to acquire RTNL without blocking and if successful
849 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
850 */
bond_opt_tryset_rtnl(struct bonding * bond,unsigned int option,char * buf)851 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
852 {
853 struct bond_opt_value optval;
854 int ret;
855
856 if (!rtnl_trylock())
857 return restart_syscall();
858 bond_opt_initstr(&optval, buf);
859 ret = __bond_opt_set_notify(bond, option, &optval);
860 rtnl_unlock();
861
862 return ret;
863 }
864
865 /**
866 * bond_opt_get - get a pointer to an option
867 * @option: option for which to return a pointer
868 *
869 * This function checks if option is valid and if so returns a pointer
870 * to its entry in the bond_opts[] option array.
871 */
bond_opt_get(unsigned int option)872 const struct bond_option *bond_opt_get(unsigned int option)
873 {
874 if (!BOND_OPT_VALID(option))
875 return NULL;
876
877 return &bond_opts[option];
878 }
879
bond_set_xfrm_features(struct bonding * bond)880 static bool bond_set_xfrm_features(struct bonding *bond)
881 {
882 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
883 return false;
884
885 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
886 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
887 else
888 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
889
890 return true;
891 }
892
bond_option_mode_set(struct bonding * bond,const struct bond_opt_value * newval)893 static int bond_option_mode_set(struct bonding *bond,
894 const struct bond_opt_value *newval)
895 {
896 if (bond->xdp_prog && !bond_xdp_check(bond, newval->value))
897 return -EOPNOTSUPP;
898
899 if (!bond_mode_uses_arp(newval->value)) {
900 if (bond->params.arp_interval) {
901 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
902 newval->string);
903 /* disable arp monitoring */
904 bond->params.arp_interval = 0;
905 }
906
907 if (!bond->params.miimon) {
908 /* set miimon to default value */
909 bond->params.miimon = BOND_DEFAULT_MIIMON;
910 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
911 bond->params.miimon);
912 }
913 }
914
915 if (newval->value == BOND_MODE_ALB)
916 bond->params.tlb_dynamic_lb = 1;
917
918 /* don't cache arp_validate between modes */
919 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
920 bond->params.mode = newval->value;
921
922 /* When changing mode, the bond device is down, we may reduce
923 * the bond_bcast_neigh_enabled in bond_close() if broadcast_neighbor
924 * enabled in 8023ad mode. Therefore, only clear broadcast_neighbor
925 * to 0.
926 */
927 bond->params.broadcast_neighbor = 0;
928
929 if (bond->dev->reg_state == NETREG_REGISTERED) {
930 bool update = false;
931
932 update |= bond_set_xfrm_features(bond);
933
934 if (update)
935 netdev_update_features(bond->dev);
936 }
937
938 bond_xdp_set_features(bond->dev);
939
940 return 0;
941 }
942
bond_option_active_slave_set(struct bonding * bond,const struct bond_opt_value * newval)943 static int bond_option_active_slave_set(struct bonding *bond,
944 const struct bond_opt_value *newval)
945 {
946 char ifname[IFNAMSIZ] = { 0, };
947 struct net_device *slave_dev;
948 int ret = 0;
949
950 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
951 if (!strlen(ifname) || newval->string[0] == '\n') {
952 slave_dev = NULL;
953 } else {
954 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
955 if (!slave_dev)
956 return -ENODEV;
957 }
958
959 if (slave_dev) {
960 if (!netif_is_bond_slave(slave_dev)) {
961 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
962 return -EINVAL;
963 }
964
965 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
966 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
967 return -EINVAL;
968 }
969 }
970
971 block_netpoll_tx();
972 /* check to see if we are clearing active */
973 if (!slave_dev) {
974 netdev_dbg(bond->dev, "Clearing current active slave\n");
975 bond_change_active_slave(bond, NULL);
976 bond_select_active_slave(bond);
977 } else {
978 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
979 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
980
981 BUG_ON(!new_active);
982
983 if (new_active == old_active) {
984 /* do nothing */
985 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
986 } else {
987 if (old_active && (new_active->link == BOND_LINK_UP) &&
988 bond_slave_is_up(new_active)) {
989 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
990 bond_change_active_slave(bond, new_active);
991 } else {
992 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
993 new_active->dev->name);
994 ret = -EINVAL;
995 }
996 }
997 }
998 unblock_netpoll_tx();
999
1000 return ret;
1001 }
1002
1003 /* There are two tricky bits here. First, if MII monitoring is activated, then
1004 * we must disable ARP monitoring. Second, if the timer isn't running, we must
1005 * start it.
1006 */
bond_option_miimon_set(struct bonding * bond,const struct bond_opt_value * newval)1007 static int bond_option_miimon_set(struct bonding *bond,
1008 const struct bond_opt_value *newval)
1009 {
1010 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
1011 newval->value);
1012 bond->params.miimon = newval->value;
1013 if (bond->params.updelay)
1014 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
1015 bond->params.updelay * bond->params.miimon);
1016 if (bond->params.downdelay)
1017 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
1018 bond->params.downdelay * bond->params.miimon);
1019 if (bond->params.peer_notif_delay)
1020 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
1021 bond->params.peer_notif_delay * bond->params.miimon);
1022 if (newval->value && bond->params.arp_interval) {
1023 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
1024 bond->params.arp_interval = 0;
1025 if (bond->params.arp_validate)
1026 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE;
1027 }
1028 if (bond->dev->flags & IFF_UP) {
1029 /* If the interface is up, we may need to fire off
1030 * the MII timer. If the interface is down, the
1031 * timer will get fired off when the open function
1032 * is called.
1033 */
1034 if (!newval->value) {
1035 cancel_delayed_work_sync(&bond->mii_work);
1036 } else {
1037 cancel_delayed_work_sync(&bond->arp_work);
1038 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1039 }
1040 }
1041
1042 return 0;
1043 }
1044
1045 /* Set up, down and peer notification delays. These must be multiples
1046 * of the MII monitoring value, and are stored internally as the
1047 * multiplier. Thus, we must translate to MS for the real world.
1048 */
_bond_option_delay_set(struct bonding * bond,const struct bond_opt_value * newval,const char * name,int * target)1049 static int _bond_option_delay_set(struct bonding *bond,
1050 const struct bond_opt_value *newval,
1051 const char *name,
1052 int *target)
1053 {
1054 int value = newval->value;
1055
1056 if (!bond->params.miimon) {
1057 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
1058 name);
1059 return -EPERM;
1060 }
1061 if ((value % bond->params.miimon) != 0) {
1062 netdev_warn(bond->dev,
1063 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1064 name,
1065 value, bond->params.miimon,
1066 (value / bond->params.miimon) *
1067 bond->params.miimon);
1068 }
1069 *target = value / bond->params.miimon;
1070 netdev_dbg(bond->dev, "Setting %s to %d\n",
1071 name,
1072 *target * bond->params.miimon);
1073
1074 return 0;
1075 }
1076
bond_option_updelay_set(struct bonding * bond,const struct bond_opt_value * newval)1077 static int bond_option_updelay_set(struct bonding *bond,
1078 const struct bond_opt_value *newval)
1079 {
1080 return _bond_option_delay_set(bond, newval, "up delay",
1081 &bond->params.updelay);
1082 }
1083
bond_option_downdelay_set(struct bonding * bond,const struct bond_opt_value * newval)1084 static int bond_option_downdelay_set(struct bonding *bond,
1085 const struct bond_opt_value *newval)
1086 {
1087 return _bond_option_delay_set(bond, newval, "down delay",
1088 &bond->params.downdelay);
1089 }
1090
bond_option_peer_notif_delay_set(struct bonding * bond,const struct bond_opt_value * newval)1091 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1092 const struct bond_opt_value *newval)
1093 {
1094 int ret = _bond_option_delay_set(bond, newval,
1095 "peer notification delay",
1096 &bond->params.peer_notif_delay);
1097 return ret;
1098 }
1099
bond_option_use_carrier_set(struct bonding * bond,const struct bond_opt_value * newval)1100 static int bond_option_use_carrier_set(struct bonding *bond,
1101 const struct bond_opt_value *newval)
1102 {
1103 return 0;
1104 }
1105
1106 /* There are two tricky bits here. First, if ARP monitoring is activated, then
1107 * we must disable MII monitoring. Second, if the ARP timer isn't running,
1108 * we must start it.
1109 */
bond_option_arp_interval_set(struct bonding * bond,const struct bond_opt_value * newval)1110 static int bond_option_arp_interval_set(struct bonding *bond,
1111 const struct bond_opt_value *newval)
1112 {
1113 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1114 newval->value);
1115 bond->params.arp_interval = newval->value;
1116 if (newval->value) {
1117 if (bond->params.miimon) {
1118 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1119 bond->params.miimon = 0;
1120 }
1121 if (!bond->params.arp_targets[0])
1122 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1123 }
1124 if (bond->dev->flags & IFF_UP) {
1125 /* If the interface is up, we may need to fire off
1126 * the ARP timer. If the interface is down, the
1127 * timer will get fired off when the open function
1128 * is called.
1129 */
1130 if (!newval->value) {
1131 if (bond->params.arp_validate)
1132 bond->recv_probe = NULL;
1133 cancel_delayed_work_sync(&bond->arp_work);
1134 } else {
1135 /* arp_validate can be set only in active-backup mode */
1136 bond->recv_probe = bond_rcv_validate;
1137 cancel_delayed_work_sync(&bond->mii_work);
1138 queue_delayed_work(bond->wq, &bond->arp_work, 0);
1139 }
1140 }
1141
1142 return 0;
1143 }
1144
_bond_options_arp_ip_target_set(struct bonding * bond,int slot,__be32 target,unsigned long last_rx)1145 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1146 __be32 target,
1147 unsigned long last_rx)
1148 {
1149 __be32 *targets = bond->params.arp_targets;
1150 struct list_head *iter;
1151 struct slave *slave;
1152
1153 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1154 bond_for_each_slave(bond, slave, iter)
1155 slave->target_last_arp_rx[slot] = last_rx;
1156 targets[slot] = target;
1157 }
1158 }
1159
_bond_option_arp_ip_target_add(struct bonding * bond,__be32 target)1160 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1161 {
1162 __be32 *targets = bond->params.arp_targets;
1163 int ind;
1164
1165 if (!bond_is_ip_target_ok(target)) {
1166 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1167 &target);
1168 return -EINVAL;
1169 }
1170
1171 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1172 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1173 &target);
1174 return -EINVAL;
1175 }
1176
1177 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1178 if (ind == -1) {
1179 netdev_err(bond->dev, "ARP target table is full!\n");
1180 return -EINVAL;
1181 }
1182
1183 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1184
1185 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1186
1187 return 0;
1188 }
1189
bond_option_arp_ip_target_add(struct bonding * bond,__be32 target)1190 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1191 {
1192 return _bond_option_arp_ip_target_add(bond, target);
1193 }
1194
bond_option_arp_ip_target_rem(struct bonding * bond,__be32 target)1195 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1196 {
1197 __be32 *targets = bond->params.arp_targets;
1198 struct list_head *iter;
1199 struct slave *slave;
1200 unsigned long *targets_rx;
1201 int ind, i;
1202
1203 if (!bond_is_ip_target_ok(target)) {
1204 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1205 &target);
1206 return -EINVAL;
1207 }
1208
1209 ind = bond_get_targets_ip(targets, target);
1210 if (ind == -1) {
1211 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1212 &target);
1213 return -EINVAL;
1214 }
1215
1216 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1217 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1218
1219 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1220
1221 bond_for_each_slave(bond, slave, iter) {
1222 targets_rx = slave->target_last_arp_rx;
1223 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1224 targets_rx[i] = targets_rx[i+1];
1225 targets_rx[i] = 0;
1226 }
1227 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1228 targets[i] = targets[i+1];
1229 targets[i] = 0;
1230
1231 return 0;
1232 }
1233
bond_option_arp_ip_targets_clear(struct bonding * bond)1234 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1235 {
1236 int i;
1237
1238 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1239 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1240 }
1241
bond_option_arp_ip_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1242 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1243 const struct bond_opt_value *newval)
1244 {
1245 int ret = -EPERM;
1246 __be32 target;
1247
1248 if (newval->string) {
1249 if (strlen(newval->string) < 1 ||
1250 !in4_pton(newval->string + 1, -1, (u8 *)&target, -1, NULL)) {
1251 netdev_err(bond->dev, "invalid ARP target specified\n");
1252 return ret;
1253 }
1254 if (newval->string[0] == '+')
1255 ret = bond_option_arp_ip_target_add(bond, target);
1256 else if (newval->string[0] == '-')
1257 ret = bond_option_arp_ip_target_rem(bond, target);
1258 else
1259 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1260 } else {
1261 target = newval->value;
1262 ret = bond_option_arp_ip_target_add(bond, target);
1263 }
1264
1265 return ret;
1266 }
1267
1268 #if IS_ENABLED(CONFIG_IPV6)
slave_can_set_ns_maddr(const struct bonding * bond,struct slave * slave)1269 static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave)
1270 {
1271 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
1272 !bond_is_active_slave(slave) &&
1273 slave->dev->flags & IFF_MULTICAST;
1274 }
1275
1276 /**
1277 * slave_set_ns_maddrs - add/del all NS mac addresses for slave
1278 * @bond: bond device
1279 * @slave: slave device
1280 * @add: add or remove all the NS mac addresses
1281 *
1282 * This function tries to add or delete all the NS mac addresses on the slave
1283 *
1284 * Note, the IPv6 NS target address is the unicast address in Neighbor
1285 * Solicitation (NS) message. The dest address of NS message should be
1286 * solicited-node multicast address of the target. The dest mac of NS message
1287 * is converted from the solicited-node multicast address.
1288 *
1289 * This function is called when
1290 * * arp_validate changes
1291 * * enslaving, releasing new slaves
1292 */
slave_set_ns_maddrs(struct bonding * bond,struct slave * slave,bool add)1293 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add)
1294 {
1295 struct in6_addr *targets = bond->params.ns_targets;
1296 char slot_maddr[MAX_ADDR_LEN];
1297 struct in6_addr mcaddr;
1298 int i;
1299
1300 if (!slave_can_set_ns_maddr(bond, slave))
1301 return;
1302
1303 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
1304 if (ipv6_addr_any(&targets[i]))
1305 break;
1306
1307 addrconf_addr_solict_mult(&targets[i], &mcaddr);
1308 if (!ndisc_mc_map(&mcaddr, slot_maddr, slave->dev, 0)) {
1309 if (add)
1310 dev_mc_add(slave->dev, slot_maddr);
1311 else
1312 dev_mc_del(slave->dev, slot_maddr);
1313 }
1314 }
1315 }
1316
bond_slave_ns_maddrs_add(struct bonding * bond,struct slave * slave)1317 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave)
1318 {
1319 if (!bond->params.arp_validate)
1320 return;
1321 slave_set_ns_maddrs(bond, slave, true);
1322 }
1323
bond_slave_ns_maddrs_del(struct bonding * bond,struct slave * slave)1324 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave)
1325 {
1326 if (!bond->params.arp_validate)
1327 return;
1328 slave_set_ns_maddrs(bond, slave, false);
1329 }
1330
1331 /**
1332 * slave_set_ns_maddr - set new NS mac address for slave
1333 * @bond: bond device
1334 * @slave: slave device
1335 * @target: the new IPv6 target
1336 * @slot: the old IPv6 target in the slot
1337 *
1338 * This function tries to replace the old mac address to new one on the slave.
1339 *
1340 * Note, the target/slot IPv6 address is the unicast address in Neighbor
1341 * Solicitation (NS) message. The dest address of NS message should be
1342 * solicited-node multicast address of the target. The dest mac of NS message
1343 * is converted from the solicited-node multicast address.
1344 *
1345 * This function is called when
1346 * * An IPv6 NS target is added or removed.
1347 */
slave_set_ns_maddr(struct bonding * bond,struct slave * slave,struct in6_addr * target,struct in6_addr * slot)1348 static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave,
1349 struct in6_addr *target, struct in6_addr *slot)
1350 {
1351 char mac_addr[MAX_ADDR_LEN];
1352 struct in6_addr mcast_addr;
1353
1354 if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave))
1355 return;
1356
1357 /* remove the previous mac addr from slave */
1358 addrconf_addr_solict_mult(slot, &mcast_addr);
1359 if (!ipv6_addr_any(slot) &&
1360 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0))
1361 dev_mc_del(slave->dev, mac_addr);
1362
1363 /* add new mac addr on slave if target is set */
1364 addrconf_addr_solict_mult(target, &mcast_addr);
1365 if (!ipv6_addr_any(target) &&
1366 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0))
1367 dev_mc_add(slave->dev, mac_addr);
1368 }
1369
_bond_options_ns_ip6_target_set(struct bonding * bond,int slot,struct in6_addr * target,unsigned long last_rx)1370 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1371 struct in6_addr *target,
1372 unsigned long last_rx)
1373 {
1374 struct in6_addr *targets = bond->params.ns_targets;
1375 struct list_head *iter;
1376 struct slave *slave;
1377
1378 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1379 bond_for_each_slave(bond, slave, iter) {
1380 slave->target_last_arp_rx[slot] = last_rx;
1381 slave_set_ns_maddr(bond, slave, target, &targets[slot]);
1382 }
1383 targets[slot] = *target;
1384 }
1385 }
1386
bond_option_ns_ip6_targets_clear(struct bonding * bond)1387 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1388 {
1389 struct in6_addr addr_any = in6addr_any;
1390 int i;
1391
1392 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1393 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1394 }
1395
bond_option_ns_ip6_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1396 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1397 const struct bond_opt_value *newval)
1398 {
1399 struct in6_addr *target = (struct in6_addr *)newval->extra;
1400 struct in6_addr *targets = bond->params.ns_targets;
1401 struct in6_addr addr_any = in6addr_any;
1402 int index;
1403
1404 if (!bond_is_ip6_target_ok(target)) {
1405 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1406 target);
1407 return -EINVAL;
1408 }
1409
1410 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1411 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1412 target);
1413 return -EINVAL;
1414 }
1415
1416 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1417 if (index == -1) {
1418 netdev_err(bond->dev, "NS target table is full!\n");
1419 return -EINVAL;
1420 }
1421
1422 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1423
1424 _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1425
1426 return 0;
1427 }
1428 #else
bond_option_ns_ip6_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1429 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1430 const struct bond_opt_value *newval)
1431 {
1432 return -EPERM;
1433 }
1434
slave_set_ns_maddrs(struct bonding * bond,struct slave * slave,bool add)1435 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {}
1436
bond_slave_ns_maddrs_add(struct bonding * bond,struct slave * slave)1437 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {}
1438
bond_slave_ns_maddrs_del(struct bonding * bond,struct slave * slave)1439 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {}
1440 #endif
1441
bond_option_arp_validate_set(struct bonding * bond,const struct bond_opt_value * newval)1442 static int bond_option_arp_validate_set(struct bonding *bond,
1443 const struct bond_opt_value *newval)
1444 {
1445 bool changed = !!bond->params.arp_validate != !!newval->value;
1446 struct list_head *iter;
1447 struct slave *slave;
1448
1449 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1450 newval->string, newval->value);
1451 bond->params.arp_validate = newval->value;
1452
1453 if (changed) {
1454 bond_for_each_slave(bond, slave, iter)
1455 slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate);
1456 }
1457
1458 return 0;
1459 }
1460
bond_option_arp_all_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1461 static int bond_option_arp_all_targets_set(struct bonding *bond,
1462 const struct bond_opt_value *newval)
1463 {
1464 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1465 newval->string, newval->value);
1466 bond->params.arp_all_targets = newval->value;
1467
1468 return 0;
1469 }
1470
bond_option_missed_max_set(struct bonding * bond,const struct bond_opt_value * newval)1471 static int bond_option_missed_max_set(struct bonding *bond,
1472 const struct bond_opt_value *newval)
1473 {
1474 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1475 newval->string, newval->value);
1476 bond->params.missed_max = newval->value;
1477
1478 return 0;
1479 }
1480
bond_option_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1481 static int bond_option_prio_set(struct bonding *bond,
1482 const struct bond_opt_value *newval)
1483 {
1484 struct slave *slave;
1485
1486 slave = bond_slave_get_rtnl(newval->slave_dev);
1487 if (!slave) {
1488 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1489 return -ENODEV;
1490 }
1491 slave->prio = newval->value;
1492
1493 if (rtnl_dereference(bond->primary_slave))
1494 slave_warn(bond->dev, slave->dev,
1495 "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1496 else
1497 bond_select_active_slave(bond);
1498
1499 return 0;
1500 }
1501
bond_option_primary_set(struct bonding * bond,const struct bond_opt_value * newval)1502 static int bond_option_primary_set(struct bonding *bond,
1503 const struct bond_opt_value *newval)
1504 {
1505 char *p, *primary = newval->string;
1506 struct list_head *iter;
1507 struct slave *slave;
1508
1509 block_netpoll_tx();
1510
1511 p = strchr(primary, '\n');
1512 if (p)
1513 *p = '\0';
1514 /* check to see if we are clearing primary */
1515 if (!strlen(primary)) {
1516 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1517 RCU_INIT_POINTER(bond->primary_slave, NULL);
1518 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1519 bond_select_active_slave(bond);
1520 goto out;
1521 }
1522
1523 bond_for_each_slave(bond, slave, iter) {
1524 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1525 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1526 rcu_assign_pointer(bond->primary_slave, slave);
1527 strcpy(bond->params.primary, slave->dev->name);
1528 bond->force_primary = true;
1529 bond_select_active_slave(bond);
1530 goto out;
1531 }
1532 }
1533
1534 if (rtnl_dereference(bond->primary_slave)) {
1535 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1536 RCU_INIT_POINTER(bond->primary_slave, NULL);
1537 bond_select_active_slave(bond);
1538 }
1539 strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1540
1541 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1542 primary);
1543
1544 out:
1545 unblock_netpoll_tx();
1546
1547 return 0;
1548 }
1549
bond_option_primary_reselect_set(struct bonding * bond,const struct bond_opt_value * newval)1550 static int bond_option_primary_reselect_set(struct bonding *bond,
1551 const struct bond_opt_value *newval)
1552 {
1553 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1554 newval->string, newval->value);
1555 bond->params.primary_reselect = newval->value;
1556
1557 block_netpoll_tx();
1558 bond_select_active_slave(bond);
1559 unblock_netpoll_tx();
1560
1561 return 0;
1562 }
1563
bond_option_fail_over_mac_set(struct bonding * bond,const struct bond_opt_value * newval)1564 static int bond_option_fail_over_mac_set(struct bonding *bond,
1565 const struct bond_opt_value *newval)
1566 {
1567 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1568 newval->string, newval->value);
1569 bond->params.fail_over_mac = newval->value;
1570
1571 return 0;
1572 }
1573
bond_option_xmit_hash_policy_set(struct bonding * bond,const struct bond_opt_value * newval)1574 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1575 const struct bond_opt_value *newval)
1576 {
1577 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1578 newval->string, newval->value);
1579 bond->params.xmit_policy = newval->value;
1580
1581 return 0;
1582 }
1583
bond_option_resend_igmp_set(struct bonding * bond,const struct bond_opt_value * newval)1584 static int bond_option_resend_igmp_set(struct bonding *bond,
1585 const struct bond_opt_value *newval)
1586 {
1587 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1588 newval->value);
1589 bond->params.resend_igmp = newval->value;
1590
1591 return 0;
1592 }
1593
bond_option_num_peer_notif_set(struct bonding * bond,const struct bond_opt_value * newval)1594 static int bond_option_num_peer_notif_set(struct bonding *bond,
1595 const struct bond_opt_value *newval)
1596 {
1597 bond->params.num_peer_notif = newval->value;
1598
1599 return 0;
1600 }
1601
bond_option_all_slaves_active_set(struct bonding * bond,const struct bond_opt_value * newval)1602 static int bond_option_all_slaves_active_set(struct bonding *bond,
1603 const struct bond_opt_value *newval)
1604 {
1605 struct list_head *iter;
1606 struct slave *slave;
1607
1608 if (newval->value == bond->params.all_slaves_active)
1609 return 0;
1610 bond->params.all_slaves_active = newval->value;
1611 bond_for_each_slave(bond, slave, iter) {
1612 if (!bond_is_active_slave(slave)) {
1613 if (newval->value)
1614 slave->inactive = 0;
1615 else
1616 slave->inactive = 1;
1617 }
1618 }
1619
1620 return 0;
1621 }
1622
bond_option_min_links_set(struct bonding * bond,const struct bond_opt_value * newval)1623 static int bond_option_min_links_set(struct bonding *bond,
1624 const struct bond_opt_value *newval)
1625 {
1626 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1627 newval->value);
1628 bond->params.min_links = newval->value;
1629 bond_set_carrier(bond);
1630
1631 return 0;
1632 }
1633
bond_option_lp_interval_set(struct bonding * bond,const struct bond_opt_value * newval)1634 static int bond_option_lp_interval_set(struct bonding *bond,
1635 const struct bond_opt_value *newval)
1636 {
1637 bond->params.lp_interval = newval->value;
1638
1639 return 0;
1640 }
1641
bond_option_pps_set(struct bonding * bond,const struct bond_opt_value * newval)1642 static int bond_option_pps_set(struct bonding *bond,
1643 const struct bond_opt_value *newval)
1644 {
1645 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1646 newval->value);
1647 bond->params.packets_per_slave = newval->value;
1648 if (newval->value > 0) {
1649 bond->params.reciprocal_packets_per_slave =
1650 reciprocal_value(newval->value);
1651 } else {
1652 /* reciprocal_packets_per_slave is unused if
1653 * packets_per_slave is 0 or 1, just initialize it
1654 */
1655 bond->params.reciprocal_packets_per_slave =
1656 (struct reciprocal_value) { 0 };
1657 }
1658
1659 return 0;
1660 }
1661
bond_option_lacp_active_set(struct bonding * bond,const struct bond_opt_value * newval)1662 static int bond_option_lacp_active_set(struct bonding *bond,
1663 const struct bond_opt_value *newval)
1664 {
1665 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1666 newval->string, newval->value);
1667 bond->params.lacp_active = newval->value;
1668 bond_3ad_update_lacp_active(bond);
1669
1670 return 0;
1671 }
1672
bond_option_lacp_rate_set(struct bonding * bond,const struct bond_opt_value * newval)1673 static int bond_option_lacp_rate_set(struct bonding *bond,
1674 const struct bond_opt_value *newval)
1675 {
1676 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1677 newval->string, newval->value);
1678 bond->params.lacp_fast = newval->value;
1679 bond_3ad_update_lacp_rate(bond);
1680
1681 return 0;
1682 }
1683
bond_option_ad_select_set(struct bonding * bond,const struct bond_opt_value * newval)1684 static int bond_option_ad_select_set(struct bonding *bond,
1685 const struct bond_opt_value *newval)
1686 {
1687 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1688 newval->string, newval->value);
1689 bond->params.ad_select = newval->value;
1690
1691 return 0;
1692 }
1693
bond_option_queue_id_set(struct bonding * bond,const struct bond_opt_value * newval)1694 static int bond_option_queue_id_set(struct bonding *bond,
1695 const struct bond_opt_value *newval)
1696 {
1697 struct slave *slave, *update_slave;
1698 struct net_device *sdev;
1699 struct list_head *iter;
1700 char *delim;
1701 int ret = 0;
1702 u16 qid;
1703
1704 /* delim will point to queue id if successful */
1705 delim = strchr(newval->string, ':');
1706 if (!delim)
1707 goto err_no_cmd;
1708
1709 /* Terminate string that points to device name and bump it
1710 * up one, so we can read the queue id there.
1711 */
1712 *delim = '\0';
1713 if (sscanf(++delim, "%hd\n", &qid) != 1)
1714 goto err_no_cmd;
1715
1716 /* Check buffer length, valid ifname and queue id */
1717 if (!dev_valid_name(newval->string) ||
1718 qid > bond->dev->real_num_tx_queues)
1719 goto err_no_cmd;
1720
1721 /* Get the pointer to that interface if it exists */
1722 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1723 if (!sdev)
1724 goto err_no_cmd;
1725
1726 /* Search for thes slave and check for duplicate qids */
1727 update_slave = NULL;
1728 bond_for_each_slave(bond, slave, iter) {
1729 if (sdev == slave->dev)
1730 /* We don't need to check the matching
1731 * slave for dups, since we're overwriting it
1732 */
1733 update_slave = slave;
1734 else if (qid && qid == slave->queue_id) {
1735 goto err_no_cmd;
1736 }
1737 }
1738
1739 if (!update_slave)
1740 goto err_no_cmd;
1741
1742 /* Actually set the qids for the slave */
1743 WRITE_ONCE(update_slave->queue_id, qid);
1744
1745 out:
1746 return ret;
1747
1748 err_no_cmd:
1749 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1750 ret = -EPERM;
1751 goto out;
1752
1753 }
1754
bond_option_slaves_set(struct bonding * bond,const struct bond_opt_value * newval)1755 static int bond_option_slaves_set(struct bonding *bond,
1756 const struct bond_opt_value *newval)
1757 {
1758 char command[IFNAMSIZ + 1] = { 0, };
1759 struct net_device *dev;
1760 char *ifname;
1761 int ret;
1762
1763 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1764 ifname = command + 1;
1765 if ((strlen(command) <= 1) ||
1766 (command[0] != '+' && command[0] != '-') ||
1767 !dev_valid_name(ifname))
1768 goto err_no_cmd;
1769
1770 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1771 if (!dev) {
1772 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1773 ifname);
1774 ret = -ENODEV;
1775 goto out;
1776 }
1777
1778 switch (command[0]) {
1779 case '+':
1780 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1781 ret = bond_enslave(bond->dev, dev, NULL);
1782 break;
1783
1784 case '-':
1785 slave_dbg(bond->dev, dev, "Releasing interface\n");
1786 ret = bond_release(bond->dev, dev);
1787 break;
1788
1789 default:
1790 /* should not run here. */
1791 goto err_no_cmd;
1792 }
1793
1794 out:
1795 return ret;
1796
1797 err_no_cmd:
1798 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1799 ret = -EPERM;
1800 goto out;
1801 }
1802
bond_option_tlb_dynamic_lb_set(struct bonding * bond,const struct bond_opt_value * newval)1803 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1804 const struct bond_opt_value *newval)
1805 {
1806 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1807 newval->string, newval->value);
1808 bond->params.tlb_dynamic_lb = newval->value;
1809
1810 return 0;
1811 }
1812
bond_option_ad_actor_sys_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1813 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1814 const struct bond_opt_value *newval)
1815 {
1816 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1817 newval->value);
1818
1819 bond->params.ad_actor_sys_prio = newval->value;
1820 bond_3ad_update_ad_actor_settings(bond);
1821
1822 return 0;
1823 }
1824
bond_option_actor_port_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1825 static int bond_option_actor_port_prio_set(struct bonding *bond,
1826 const struct bond_opt_value *newval)
1827 {
1828 struct slave *slave;
1829
1830 slave = bond_slave_get_rtnl(newval->slave_dev);
1831 if (!slave) {
1832 netdev_dbg(bond->dev, "%s called on NULL slave\n", __func__);
1833 return -ENODEV;
1834 }
1835
1836 netdev_dbg(newval->slave_dev, "Setting actor_port_prio to %llu\n",
1837 newval->value);
1838
1839 SLAVE_AD_INFO(slave)->port_priority = newval->value;
1840 bond_3ad_update_ad_actor_settings(bond);
1841
1842 return 0;
1843 }
1844
bond_option_ad_actor_system_set(struct bonding * bond,const struct bond_opt_value * newval)1845 static int bond_option_ad_actor_system_set(struct bonding *bond,
1846 const struct bond_opt_value *newval)
1847 {
1848 u8 macaddr[ETH_ALEN];
1849 u8 *mac;
1850
1851 if (newval->string) {
1852 if (!mac_pton(newval->string, macaddr))
1853 goto err;
1854 mac = macaddr;
1855 } else {
1856 mac = (u8 *)&newval->value;
1857 }
1858
1859 if (is_multicast_ether_addr(mac))
1860 goto err;
1861
1862 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1863 ether_addr_copy(bond->params.ad_actor_system, mac);
1864 bond_3ad_update_ad_actor_settings(bond);
1865
1866 return 0;
1867
1868 err:
1869 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1870 return -EINVAL;
1871 }
1872
bond_option_ad_user_port_key_set(struct bonding * bond,const struct bond_opt_value * newval)1873 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1874 const struct bond_opt_value *newval)
1875 {
1876 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1877 newval->value);
1878
1879 bond->params.ad_user_port_key = newval->value;
1880 return 0;
1881 }
1882
bond_option_coupled_control_set(struct bonding * bond,const struct bond_opt_value * newval)1883 static int bond_option_coupled_control_set(struct bonding *bond,
1884 const struct bond_opt_value *newval)
1885 {
1886 netdev_info(bond->dev, "Setting coupled_control to %s (%llu)\n",
1887 newval->string, newval->value);
1888
1889 bond->params.coupled_control = newval->value;
1890 return 0;
1891 }
1892
bond_option_broadcast_neigh_set(struct bonding * bond,const struct bond_opt_value * newval)1893 static int bond_option_broadcast_neigh_set(struct bonding *bond,
1894 const struct bond_opt_value *newval)
1895 {
1896 if (bond->params.broadcast_neighbor == newval->value)
1897 return 0;
1898
1899 bond->params.broadcast_neighbor = newval->value;
1900 if (bond->dev->flags & IFF_UP) {
1901 if (bond->params.broadcast_neighbor)
1902 static_branch_inc(&bond_bcast_neigh_enabled);
1903 else
1904 static_branch_dec(&bond_bcast_neigh_enabled);
1905 }
1906
1907 netdev_dbg(bond->dev, "Setting broadcast_neighbor to %s (%llu)\n",
1908 newval->string, newval->value);
1909 return 0;
1910 }
1911