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/hex.h>
10 #include <linux/if.h>
11 #include <linux/netdevice.h>
12 #include <linux/spinlock.h>
13 #include <linux/rcupdate.h>
14 #include <linux/ctype.h>
15 #include <linux/inet.h>
16 #include <linux/sched/signal.h>
17
18 #include <net/bonding.h>
19 #include <net/ndisc.h>
20
21 static int bond_option_active_slave_set(struct bonding *bond,
22 const struct bond_opt_value *newval);
23 static int bond_option_miimon_set(struct bonding *bond,
24 const struct bond_opt_value *newval);
25 static int bond_option_updelay_set(struct bonding *bond,
26 const struct bond_opt_value *newval);
27 static int bond_option_downdelay_set(struct bonding *bond,
28 const struct bond_opt_value *newval);
29 static int bond_option_peer_notif_delay_set(struct bonding *bond,
30 const struct bond_opt_value *newval);
31 static int bond_option_use_carrier_set(struct bonding *bond,
32 const struct bond_opt_value *newval);
33 static int bond_option_arp_interval_set(struct bonding *bond,
34 const struct bond_opt_value *newval);
35 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target);
36 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target);
37 static int bond_option_arp_ip_targets_set(struct bonding *bond,
38 const struct bond_opt_value *newval);
39 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
40 const struct bond_opt_value *newval);
41 static int bond_option_arp_validate_set(struct bonding *bond,
42 const struct bond_opt_value *newval);
43 static int bond_option_arp_all_targets_set(struct bonding *bond,
44 const struct bond_opt_value *newval);
45 static int bond_option_prio_set(struct bonding *bond,
46 const struct bond_opt_value *newval);
47 static int bond_option_primary_set(struct bonding *bond,
48 const struct bond_opt_value *newval);
49 static int bond_option_primary_reselect_set(struct bonding *bond,
50 const struct bond_opt_value *newval);
51 static int bond_option_fail_over_mac_set(struct bonding *bond,
52 const struct bond_opt_value *newval);
53 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
54 const struct bond_opt_value *newval);
55 static int bond_option_resend_igmp_set(struct bonding *bond,
56 const struct bond_opt_value *newval);
57 static int bond_option_num_peer_notif_set(struct bonding *bond,
58 const struct bond_opt_value *newval);
59 static int bond_option_all_slaves_active_set(struct bonding *bond,
60 const struct bond_opt_value *newval);
61 static int bond_option_min_links_set(struct bonding *bond,
62 const struct bond_opt_value *newval);
63 static int bond_option_lp_interval_set(struct bonding *bond,
64 const struct bond_opt_value *newval);
65 static int bond_option_pps_set(struct bonding *bond,
66 const struct bond_opt_value *newval);
67 static int bond_option_lacp_active_set(struct bonding *bond,
68 const struct bond_opt_value *newval);
69 static int bond_option_lacp_rate_set(struct bonding *bond,
70 const struct bond_opt_value *newval);
71 static int bond_option_lacp_strict_set(struct bonding *bond,
72 const struct bond_opt_value *newval);
73 static int bond_option_ad_select_set(struct bonding *bond,
74 const struct bond_opt_value *newval);
75 static int bond_option_queue_id_set(struct bonding *bond,
76 const struct bond_opt_value *newval);
77 static int bond_option_mode_set(struct bonding *bond,
78 const struct bond_opt_value *newval);
79 static int bond_option_slaves_set(struct bonding *bond,
80 const struct bond_opt_value *newval);
81 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
82 const struct bond_opt_value *newval);
83 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
84 const struct bond_opt_value *newval);
85 static int bond_option_actor_port_prio_set(struct bonding *bond,
86 const struct bond_opt_value *newval);
87 static int bond_option_ad_actor_system_set(struct bonding *bond,
88 const struct bond_opt_value *newval);
89 static int bond_option_ad_user_port_key_set(struct bonding *bond,
90 const struct bond_opt_value *newval);
91 static int bond_option_missed_max_set(struct bonding *bond,
92 const struct bond_opt_value *newval);
93 static int bond_option_coupled_control_set(struct bonding *bond,
94 const struct bond_opt_value *newval);
95 static int bond_option_broadcast_neigh_set(struct bonding *bond,
96 const struct bond_opt_value *newval);
97
98 static const struct bond_opt_value bond_mode_tbl[] = {
99 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT},
100 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0},
101 { "balance-xor", BOND_MODE_XOR, 0},
102 { "broadcast", BOND_MODE_BROADCAST, 0},
103 { "802.3ad", BOND_MODE_8023AD, 0},
104 { "balance-tlb", BOND_MODE_TLB, 0},
105 { "balance-alb", BOND_MODE_ALB, 0},
106 { NULL, -1, 0},
107 };
108
109 static const struct bond_opt_value bond_pps_tbl[] = {
110 { "default", 1, BOND_VALFLAG_DEFAULT},
111 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX},
112 { NULL, -1, 0},
113 };
114
115 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = {
116 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT},
117 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0},
118 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0},
119 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0},
120 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0},
121 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0},
122 { NULL, -1, 0},
123 };
124
125 static const struct bond_opt_value bond_arp_validate_tbl[] = {
126 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT},
127 { "active", BOND_ARP_VALIDATE_ACTIVE, 0},
128 { "backup", BOND_ARP_VALIDATE_BACKUP, 0},
129 { "all", BOND_ARP_VALIDATE_ALL, 0},
130 { "filter", BOND_ARP_FILTER, 0},
131 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0},
132 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0},
133 { NULL, -1, 0},
134 };
135
136 static const struct bond_opt_value bond_arp_all_targets_tbl[] = {
137 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT},
138 { "all", BOND_ARP_TARGETS_ALL, 0},
139 { NULL, -1, 0},
140 };
141
142 static const struct bond_opt_value bond_fail_over_mac_tbl[] = {
143 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT},
144 { "active", BOND_FOM_ACTIVE, 0},
145 { "follow", BOND_FOM_FOLLOW, 0},
146 { NULL, -1, 0},
147 };
148
149 static const struct bond_opt_value bond_intmax_tbl[] = {
150 { "off", 0, BOND_VALFLAG_DEFAULT},
151 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
152 { NULL, -1, 0}
153 };
154
155 static const struct bond_opt_value bond_lacp_active[] = {
156 { "off", 0, 0},
157 { "on", 1, BOND_VALFLAG_DEFAULT},
158 { NULL, -1, 0}
159 };
160
161 static const struct bond_opt_value bond_lacp_rate_tbl[] = {
162 { "slow", AD_LACP_SLOW, 0},
163 { "fast", AD_LACP_FAST, 0},
164 { NULL, -1, 0},
165 };
166
167 static const struct bond_opt_value bond_lacp_strict_tbl[] = {
168 { "off", 0, BOND_VALFLAG_DEFAULT},
169 { "on", 1, 0},
170 { NULL, -1, 0 }
171 };
172
173 static const struct bond_opt_value bond_ad_select_tbl[] = {
174 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT},
175 { "bandwidth", BOND_AD_BANDWIDTH, 0},
176 { "count", BOND_AD_COUNT, 0},
177 { "actor_port_prio", BOND_AD_PRIO, 0},
178 { NULL, -1, 0},
179 };
180
181 static const struct bond_opt_value bond_num_peer_notif_tbl[] = {
182 { "off", 0, 0},
183 { "maxval", 255, BOND_VALFLAG_MAX},
184 { "default", 1, BOND_VALFLAG_DEFAULT},
185 { NULL, -1, 0}
186 };
187
188 static const struct bond_opt_value bond_peer_notif_delay_tbl[] = {
189 { "off", 0, 0},
190 { "maxval", 300000, BOND_VALFLAG_MAX},
191 { NULL, -1, 0}
192 };
193
194 static const struct bond_opt_value bond_primary_reselect_tbl[] = {
195 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT},
196 { "better", BOND_PRI_RESELECT_BETTER, 0},
197 { "failure", BOND_PRI_RESELECT_FAILURE, 0},
198 { NULL, -1},
199 };
200
201 static const struct bond_opt_value bond_use_carrier_tbl[] = {
202 { "on", 1, BOND_VALFLAG_DEFAULT},
203 { NULL, -1, 0}
204 };
205
206 static const struct bond_opt_value bond_all_slaves_active_tbl[] = {
207 { "off", 0, BOND_VALFLAG_DEFAULT},
208 { "on", 1, 0},
209 { NULL, -1, 0}
210 };
211
212 static const struct bond_opt_value bond_resend_igmp_tbl[] = {
213 { "off", 0, 0},
214 { "maxval", 255, BOND_VALFLAG_MAX},
215 { "default", 1, BOND_VALFLAG_DEFAULT},
216 { NULL, -1, 0}
217 };
218
219 static const struct bond_opt_value bond_lp_interval_tbl[] = {
220 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
221 { "maxval", INT_MAX, BOND_VALFLAG_MAX},
222 { NULL, -1, 0},
223 };
224
225 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = {
226 { "off", 0, 0},
227 { "on", 1, BOND_VALFLAG_DEFAULT},
228 { NULL, -1, 0}
229 };
230
231 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = {
232 { "minval", 1, BOND_VALFLAG_MIN},
233 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT},
234 { NULL, -1, 0},
235 };
236
237 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = {
238 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT},
239 { "maxval", 1023, BOND_VALFLAG_MAX},
240 { NULL, -1, 0},
241 };
242
243 static const struct bond_opt_value bond_missed_max_tbl[] = {
244 { "minval", 1, BOND_VALFLAG_MIN},
245 { "maxval", 255, BOND_VALFLAG_MAX},
246 { "default", 2, BOND_VALFLAG_DEFAULT},
247 { NULL, -1, 0},
248 };
249
250 static const struct bond_opt_value bond_coupled_control_tbl[] = {
251 { "on", 1, BOND_VALFLAG_DEFAULT},
252 { "off", 0, 0},
253 { NULL, -1, 0},
254 };
255
256 static const struct bond_opt_value bond_broadcast_neigh_tbl[] = {
257 { "off", 0, BOND_VALFLAG_DEFAULT},
258 { "on", 1, 0},
259 { NULL, -1, 0}
260 };
261
262 static const struct bond_option bond_opts[BOND_OPT_LAST] = {
263 [BOND_OPT_MODE] = {
264 .id = BOND_OPT_MODE,
265 .name = "mode",
266 .desc = "bond device mode",
267 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN,
268 .values = bond_mode_tbl,
269 .set = bond_option_mode_set
270 },
271 [BOND_OPT_PACKETS_PER_SLAVE] = {
272 .id = BOND_OPT_PACKETS_PER_SLAVE,
273 .name = "packets_per_slave",
274 .desc = "Packets to send per slave in RR mode",
275 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)),
276 .values = bond_pps_tbl,
277 .set = bond_option_pps_set
278 },
279 [BOND_OPT_XMIT_HASH] = {
280 .id = BOND_OPT_XMIT_HASH,
281 .name = "xmit_hash_policy",
282 .desc = "balance-xor, 802.3ad, and tlb hashing method",
283 .values = bond_xmit_hashtype_tbl,
284 .set = bond_option_xmit_hash_policy_set
285 },
286 [BOND_OPT_ARP_VALIDATE] = {
287 .id = BOND_OPT_ARP_VALIDATE,
288 .name = "arp_validate",
289 .desc = "validate src/dst of ARP probes",
290 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
291 BIT(BOND_MODE_ALB),
292 .values = bond_arp_validate_tbl,
293 .set = bond_option_arp_validate_set
294 },
295 [BOND_OPT_ARP_ALL_TARGETS] = {
296 .id = BOND_OPT_ARP_ALL_TARGETS,
297 .name = "arp_all_targets",
298 .desc = "fail on any/all arp targets timeout",
299 .values = bond_arp_all_targets_tbl,
300 .set = bond_option_arp_all_targets_set
301 },
302 [BOND_OPT_FAIL_OVER_MAC] = {
303 .id = BOND_OPT_FAIL_OVER_MAC,
304 .name = "fail_over_mac",
305 .desc = "For active-backup, do not set all slaves to the same MAC",
306 .flags = BOND_OPTFLAG_NOSLAVES,
307 .values = bond_fail_over_mac_tbl,
308 .set = bond_option_fail_over_mac_set
309 },
310 [BOND_OPT_ARP_INTERVAL] = {
311 .id = BOND_OPT_ARP_INTERVAL,
312 .name = "arp_interval",
313 .desc = "arp interval in milliseconds",
314 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
315 BIT(BOND_MODE_ALB),
316 .values = bond_intmax_tbl,
317 .set = bond_option_arp_interval_set
318 },
319 [BOND_OPT_MISSED_MAX] = {
320 .id = BOND_OPT_MISSED_MAX,
321 .name = "arp_missed_max",
322 .desc = "Maximum number of missed ARP interval",
323 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) |
324 BIT(BOND_MODE_ALB),
325 .values = bond_missed_max_tbl,
326 .set = bond_option_missed_max_set
327 },
328 [BOND_OPT_ARP_TARGETS] = {
329 .id = BOND_OPT_ARP_TARGETS,
330 .name = "arp_ip_target",
331 .desc = "arp targets in n.n.n.n form",
332 .flags = BOND_OPTFLAG_RAWVAL,
333 .set = bond_option_arp_ip_targets_set
334 },
335 [BOND_OPT_NS_TARGETS] = {
336 .id = BOND_OPT_NS_TARGETS,
337 .name = "ns_ip6_target",
338 .desc = "NS targets in ffff:ffff::ffff:ffff form",
339 .flags = BOND_OPTFLAG_RAWVAL,
340 .set = bond_option_ns_ip6_targets_set
341 },
342 [BOND_OPT_DOWNDELAY] = {
343 .id = BOND_OPT_DOWNDELAY,
344 .name = "downdelay",
345 .desc = "Delay before considering link down, in milliseconds",
346 .values = bond_intmax_tbl,
347 .set = bond_option_downdelay_set
348 },
349 [BOND_OPT_UPDELAY] = {
350 .id = BOND_OPT_UPDELAY,
351 .name = "updelay",
352 .desc = "Delay before considering link up, in milliseconds",
353 .values = bond_intmax_tbl,
354 .set = bond_option_updelay_set
355 },
356 [BOND_OPT_LACP_ACTIVE] = {
357 .id = BOND_OPT_LACP_ACTIVE,
358 .name = "lacp_active",
359 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to",
360 .flags = BOND_OPTFLAG_IFDOWN,
361 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
362 .values = bond_lacp_active,
363 .set = bond_option_lacp_active_set
364 },
365 [BOND_OPT_LACP_RATE] = {
366 .id = BOND_OPT_LACP_RATE,
367 .name = "lacp_rate",
368 .desc = "LACPDU tx rate to request from 802.3ad partner",
369 .flags = BOND_OPTFLAG_IFDOWN,
370 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
371 .values = bond_lacp_rate_tbl,
372 .set = bond_option_lacp_rate_set
373 },
374 [BOND_OPT_LACP_STRICT] = {
375 .id = BOND_OPT_LACP_STRICT,
376 .name = "lacp_strict",
377 .desc = "Define the LACP fallback mode when no slaves have negotiated",
378 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
379 .values = bond_lacp_strict_tbl,
380 .set = bond_option_lacp_strict_set
381 },
382 [BOND_OPT_MINLINKS] = {
383 .id = BOND_OPT_MINLINKS,
384 .name = "min_links",
385 .desc = "Minimum number of available links before turning on carrier",
386 .values = bond_intmax_tbl,
387 .set = bond_option_min_links_set
388 },
389 [BOND_OPT_AD_SELECT] = {
390 .id = BOND_OPT_AD_SELECT,
391 .name = "ad_select",
392 .desc = "802.3ad aggregation selection logic",
393 .flags = BOND_OPTFLAG_IFDOWN,
394 .values = bond_ad_select_tbl,
395 .set = bond_option_ad_select_set
396 },
397 [BOND_OPT_NUM_PEER_NOTIF] = {
398 .id = BOND_OPT_NUM_PEER_NOTIF,
399 .name = "num_unsol_na",
400 .desc = "Number of peer notifications to send on failover event",
401 .values = bond_num_peer_notif_tbl,
402 .set = bond_option_num_peer_notif_set
403 },
404 [BOND_OPT_MIIMON] = {
405 .id = BOND_OPT_MIIMON,
406 .name = "miimon",
407 .desc = "Link check interval in milliseconds",
408 .values = bond_intmax_tbl,
409 .set = bond_option_miimon_set
410 },
411 [BOND_OPT_PRIO] = {
412 .id = BOND_OPT_PRIO,
413 .name = "prio",
414 .desc = "Link priority for failover re-selection",
415 .flags = BOND_OPTFLAG_RAWVAL,
416 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
417 BIT(BOND_MODE_TLB) |
418 BIT(BOND_MODE_ALB)),
419 .set = bond_option_prio_set
420 },
421 [BOND_OPT_PRIMARY] = {
422 .id = BOND_OPT_PRIMARY,
423 .name = "primary",
424 .desc = "Primary network device to use",
425 .flags = BOND_OPTFLAG_RAWVAL,
426 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
427 BIT(BOND_MODE_TLB) |
428 BIT(BOND_MODE_ALB)),
429 .set = bond_option_primary_set
430 },
431 [BOND_OPT_PRIMARY_RESELECT] = {
432 .id = BOND_OPT_PRIMARY_RESELECT,
433 .name = "primary_reselect",
434 .desc = "Reselect primary slave once it comes up",
435 .values = bond_primary_reselect_tbl,
436 .set = bond_option_primary_reselect_set
437 },
438 [BOND_OPT_USE_CARRIER] = {
439 .id = BOND_OPT_USE_CARRIER,
440 .name = "use_carrier",
441 .desc = "option obsolete, use_carrier cannot be disabled",
442 .values = bond_use_carrier_tbl,
443 .set = bond_option_use_carrier_set
444 },
445 [BOND_OPT_ACTIVE_SLAVE] = {
446 .id = BOND_OPT_ACTIVE_SLAVE,
447 .name = "active_slave",
448 .desc = "Currently active slave",
449 .flags = BOND_OPTFLAG_RAWVAL,
450 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
451 BIT(BOND_MODE_TLB) |
452 BIT(BOND_MODE_ALB)),
453 .set = bond_option_active_slave_set
454 },
455 [BOND_OPT_QUEUE_ID] = {
456 .id = BOND_OPT_QUEUE_ID,
457 .name = "queue_id",
458 .desc = "Set queue id of a slave",
459 .flags = BOND_OPTFLAG_RAWVAL,
460 .set = bond_option_queue_id_set
461 },
462 [BOND_OPT_ALL_SLAVES_ACTIVE] = {
463 .id = BOND_OPT_ALL_SLAVES_ACTIVE,
464 .name = "all_slaves_active",
465 .desc = "Keep all frames received on an interface by setting active flag for all slaves",
466 .values = bond_all_slaves_active_tbl,
467 .set = bond_option_all_slaves_active_set
468 },
469 [BOND_OPT_RESEND_IGMP] = {
470 .id = BOND_OPT_RESEND_IGMP,
471 .name = "resend_igmp",
472 .desc = "Number of IGMP membership reports to send on link failure",
473 .values = bond_resend_igmp_tbl,
474 .set = bond_option_resend_igmp_set
475 },
476 [BOND_OPT_LP_INTERVAL] = {
477 .id = BOND_OPT_LP_INTERVAL,
478 .name = "lp_interval",
479 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch",
480 .values = bond_lp_interval_tbl,
481 .set = bond_option_lp_interval_set
482 },
483 [BOND_OPT_SLAVES] = {
484 .id = BOND_OPT_SLAVES,
485 .name = "slaves",
486 .desc = "Slave membership management",
487 .flags = BOND_OPTFLAG_RAWVAL,
488 .set = bond_option_slaves_set
489 },
490 [BOND_OPT_TLB_DYNAMIC_LB] = {
491 .id = BOND_OPT_TLB_DYNAMIC_LB,
492 .name = "tlb_dynamic_lb",
493 .desc = "Enable dynamic flow shuffling",
494 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)),
495 .values = bond_tlb_dynamic_lb_tbl,
496 .flags = BOND_OPTFLAG_IFDOWN,
497 .set = bond_option_tlb_dynamic_lb_set,
498 },
499 [BOND_OPT_AD_ACTOR_SYS_PRIO] = {
500 .id = BOND_OPT_AD_ACTOR_SYS_PRIO,
501 .name = "ad_actor_sys_prio",
502 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
503 .values = bond_ad_actor_sys_prio_tbl,
504 .set = bond_option_ad_actor_sys_prio_set,
505 },
506 [BOND_OPT_ACTOR_PORT_PRIO] = {
507 .id = BOND_OPT_ACTOR_PORT_PRIO,
508 .name = "actor_port_prio",
509 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
510 .flags = BOND_OPTFLAG_RAWVAL,
511 .set = bond_option_actor_port_prio_set,
512 },
513 [BOND_OPT_AD_ACTOR_SYSTEM] = {
514 .id = BOND_OPT_AD_ACTOR_SYSTEM,
515 .name = "ad_actor_system",
516 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
517 .flags = BOND_OPTFLAG_RAWVAL,
518 .set = bond_option_ad_actor_system_set,
519 },
520 [BOND_OPT_AD_USER_PORT_KEY] = {
521 .id = BOND_OPT_AD_USER_PORT_KEY,
522 .name = "ad_user_port_key",
523 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
524 .flags = BOND_OPTFLAG_IFDOWN,
525 .values = bond_ad_user_port_key_tbl,
526 .set = bond_option_ad_user_port_key_set,
527 },
528 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = {
529 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS,
530 .name = "num_grat_arp",
531 .desc = "Number of peer notifications to send on failover event",
532 .values = bond_num_peer_notif_tbl,
533 .set = bond_option_num_peer_notif_set
534 },
535 [BOND_OPT_PEER_NOTIF_DELAY] = {
536 .id = BOND_OPT_PEER_NOTIF_DELAY,
537 .name = "peer_notif_delay",
538 .desc = "Delay between each peer notification on failover event, in milliseconds",
539 .values = bond_peer_notif_delay_tbl,
540 .set = bond_option_peer_notif_delay_set
541 },
542 [BOND_OPT_COUPLED_CONTROL] = {
543 .id = BOND_OPT_COUPLED_CONTROL,
544 .name = "coupled_control",
545 .desc = "Opt into using coupled control MUX for LACP states",
546 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
547 .flags = BOND_OPTFLAG_IFDOWN,
548 .values = bond_coupled_control_tbl,
549 .set = bond_option_coupled_control_set,
550 },
551 [BOND_OPT_BROADCAST_NEIGH] = {
552 .id = BOND_OPT_BROADCAST_NEIGH,
553 .name = "broadcast_neighbor",
554 .desc = "Broadcast neighbor packets to all active slaves",
555 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)),
556 .values = bond_broadcast_neigh_tbl,
557 .set = bond_option_broadcast_neigh_set,
558 }
559 };
560
561 /* Searches for an option by name */
bond_opt_get_by_name(const char * name)562 const struct bond_option *bond_opt_get_by_name(const char *name)
563 {
564 const struct bond_option *opt;
565 int option;
566
567 for (option = 0; option < BOND_OPT_LAST; option++) {
568 opt = bond_opt_get(option);
569 if (opt && !strcmp(opt->name, name))
570 return opt;
571 }
572
573 return NULL;
574 }
575
576 /* Searches for a value in opt's values[] table */
bond_opt_get_val(unsigned int option,u64 val)577 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val)
578 {
579 const struct bond_option *opt;
580 int i;
581
582 opt = bond_opt_get(option);
583 if (WARN_ON(!opt))
584 return NULL;
585 for (i = 0; opt->values && opt->values[i].string; i++)
586 if (opt->values[i].value == val)
587 return &opt->values[i];
588
589 return NULL;
590 }
591
592 /* Searches for a value in opt's values[] table which matches the flagmask */
bond_opt_get_flags(const struct bond_option * opt,u32 flagmask)593 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt,
594 u32 flagmask)
595 {
596 int i;
597
598 for (i = 0; opt->values && opt->values[i].string; i++)
599 if (opt->values[i].flags & flagmask)
600 return &opt->values[i];
601
602 return NULL;
603 }
604
605 /* If maxval is missing then there's no range to check. In case minval is
606 * missing then it's considered to be 0.
607 */
bond_opt_check_range(const struct bond_option * opt,u64 val)608 static bool bond_opt_check_range(const struct bond_option *opt, u64 val)
609 {
610 const struct bond_opt_value *minval, *maxval;
611
612 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
613 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
614 if (!maxval || (minval && val < minval->value) || val > maxval->value)
615 return false;
616
617 return true;
618 }
619
620 /**
621 * bond_opt_parse - parse option value
622 * @opt: the option to parse against
623 * @val: value to parse
624 *
625 * This function tries to extract the value from @val and check if it's
626 * a possible match for the option and returns NULL if a match isn't found,
627 * or the struct_opt_value that matched. It also strips the new line from
628 * @val->string if it's present.
629 */
bond_opt_parse(const struct bond_option * opt,struct bond_opt_value * val)630 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
631 struct bond_opt_value *val)
632 {
633 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, };
634 const struct bond_opt_value *tbl;
635 const struct bond_opt_value *ret = NULL;
636 bool checkval;
637 int i, rv;
638
639 /* No parsing if the option wants a raw val */
640 if (opt->flags & BOND_OPTFLAG_RAWVAL)
641 return val;
642
643 tbl = opt->values;
644 if (!tbl)
645 goto out;
646
647 /* ULLONG_MAX is used to bypass string processing */
648 checkval = val->value != ULLONG_MAX;
649 if (!checkval) {
650 if (!val->string)
651 goto out;
652 p = strchr(val->string, '\n');
653 if (p)
654 *p = '\0';
655 for (p = val->string; *p; p++)
656 if (!(isdigit(*p) || isspace(*p)))
657 break;
658 /* The following code extracts the string to match or the value
659 * and sets checkval appropriately
660 */
661 if (*p) {
662 rv = sscanf(val->string, "%32s", valstr);
663 } else {
664 rv = sscanf(val->string, "%llu", &val->value);
665 checkval = true;
666 }
667 if (!rv)
668 goto out;
669 }
670
671 for (i = 0; tbl[i].string; i++) {
672 /* Check for exact match */
673 if (checkval) {
674 if (val->value == tbl[i].value)
675 ret = &tbl[i];
676 } else {
677 if (!strcmp(valstr, "default") &&
678 (tbl[i].flags & BOND_VALFLAG_DEFAULT))
679 ret = &tbl[i];
680
681 if (!strcmp(valstr, tbl[i].string))
682 ret = &tbl[i];
683 }
684 /* Found an exact match */
685 if (ret)
686 goto out;
687 }
688 /* Possible range match */
689 if (checkval && bond_opt_check_range(opt, val->value))
690 ret = val;
691 out:
692 return ret;
693 }
694
695 /* Check opt's dependencies against bond mode and currently set options */
bond_opt_check_deps(struct bonding * bond,const struct bond_option * opt)696 static int bond_opt_check_deps(struct bonding *bond,
697 const struct bond_option *opt)
698 {
699 struct bond_params *params = &bond->params;
700
701 if (test_bit(params->mode, &opt->unsuppmodes))
702 return -EACCES;
703 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond))
704 return -ENOTEMPTY;
705 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP))
706 return -EBUSY;
707
708 return 0;
709 }
710
bond_opt_dep_print(struct bonding * bond,const struct bond_option * opt,struct nlattr * bad_attr,struct netlink_ext_ack * extack)711 static void bond_opt_dep_print(struct bonding *bond,
712 const struct bond_option *opt,
713 struct nlattr *bad_attr,
714 struct netlink_ext_ack *extack)
715 {
716 const struct bond_opt_value *modeval;
717 struct bond_params *params;
718
719 params = &bond->params;
720 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode);
721 if (test_bit(params->mode, &opt->unsuppmodes)) {
722 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n",
723 opt->name, modeval->string, modeval->value);
724 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
725 "option not supported in mode");
726 }
727 }
728
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)729 static void bond_opt_error_interpret(struct bonding *bond,
730 const struct bond_option *opt,
731 int error, const struct bond_opt_value *val,
732 struct nlattr *bad_attr,
733 struct netlink_ext_ack *extack)
734 {
735 const struct bond_opt_value *minval, *maxval;
736 char *p;
737
738 switch (error) {
739 case -EINVAL:
740 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value");
741 if (val) {
742 if (val->string) {
743 /* sometimes RAWVAL opts may have new lines */
744 p = strchr(val->string, '\n');
745 if (p)
746 *p = '\0';
747 netdev_err(bond->dev, "option %s: invalid value (%s)\n",
748 opt->name, val->string);
749 } else {
750 netdev_err(bond->dev, "option %s: invalid value (%llu)\n",
751 opt->name, val->value);
752 }
753 }
754 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN);
755 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX);
756 if (!maxval)
757 break;
758 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n",
759 opt->name, minval ? minval->value : 0, maxval->value);
760 break;
761 case -EACCES:
762 bond_opt_dep_print(bond, opt, bad_attr, extack);
763 break;
764 case -ENOTEMPTY:
765 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
766 "unable to set option because the bond device has slaves");
767 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n",
768 opt->name);
769 break;
770 case -EBUSY:
771 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
772 "unable to set option because the bond is up");
773 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n",
774 opt->name);
775 break;
776 case -ENODEV:
777 if (val && val->string) {
778 p = strchr(val->string, '\n');
779 if (p)
780 *p = '\0';
781 netdev_err(bond->dev, "option %s: interface %s does not exist!\n",
782 opt->name, val->string);
783 NL_SET_ERR_MSG_ATTR(extack, bad_attr,
784 "interface does not exist");
785 }
786 break;
787 default:
788 break;
789 }
790 }
791
792 /**
793 * __bond_opt_set - set a bonding option
794 * @bond: target bond device
795 * @option: option to set
796 * @val: value to set it to
797 * @bad_attr: netlink attribue that caused the error
798 * @extack: extended netlink error structure, used when an error message
799 * needs to be returned to the caller via netlink
800 *
801 * This function is used to change the bond's option value, it can be
802 * used for both enabling/changing an option and for disabling it. RTNL lock
803 * must be obtained before calling this function.
804 */
__bond_opt_set(struct bonding * bond,unsigned int option,struct bond_opt_value * val,struct nlattr * bad_attr,struct netlink_ext_ack * extack)805 int __bond_opt_set(struct bonding *bond,
806 unsigned int option, struct bond_opt_value *val,
807 struct nlattr *bad_attr, struct netlink_ext_ack *extack)
808 {
809 const struct bond_opt_value *retval = NULL;
810 const struct bond_option *opt;
811 int ret = -ENOENT;
812
813 ASSERT_RTNL();
814
815 opt = bond_opt_get(option);
816 if (WARN_ON(!val) || WARN_ON(!opt))
817 goto out;
818 ret = bond_opt_check_deps(bond, opt);
819 if (ret)
820 goto out;
821 retval = bond_opt_parse(opt, val);
822 if (!retval) {
823 ret = -EINVAL;
824 goto out;
825 }
826 ret = opt->set(bond, retval);
827 out:
828 if (ret)
829 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack);
830
831 return ret;
832 }
833 /**
834 * __bond_opt_set_notify - set a bonding option
835 * @bond: target bond device
836 * @option: option to set
837 * @val: value to set it to
838 *
839 * This function is used to change the bond's option value and trigger
840 * a notification to user sapce. It can be used for both enabling/changing
841 * an option and for disabling it. RTNL lock must be obtained before calling
842 * this function.
843 */
__bond_opt_set_notify(struct bonding * bond,unsigned int option,struct bond_opt_value * val)844 int __bond_opt_set_notify(struct bonding *bond,
845 unsigned int option, struct bond_opt_value *val)
846 {
847 int ret;
848
849 ASSERT_RTNL();
850
851 ret = __bond_opt_set(bond, option, val, NULL, NULL);
852
853 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED))
854 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev);
855
856 return ret;
857 }
858
859 /**
860 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set
861 * @bond: target bond device
862 * @option: option to set
863 * @buf: value to set it to
864 *
865 * This function tries to acquire RTNL without blocking and if successful
866 * calls __bond_opt_set. It is mainly used for sysfs option manipulation.
867 */
bond_opt_tryset_rtnl(struct bonding * bond,unsigned int option,char * buf)868 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf)
869 {
870 struct bond_opt_value optval;
871 int ret;
872
873 if (!rtnl_trylock())
874 return restart_syscall();
875 bond_opt_initstr(&optval, buf);
876 ret = __bond_opt_set_notify(bond, option, &optval);
877 rtnl_unlock();
878
879 return ret;
880 }
881
882 /**
883 * bond_opt_get - get a pointer to an option
884 * @option: option for which to return a pointer
885 *
886 * This function checks if option is valid and if so returns a pointer
887 * to its entry in the bond_opts[] option array.
888 */
bond_opt_get(unsigned int option)889 const struct bond_option *bond_opt_get(unsigned int option)
890 {
891 if (!BOND_OPT_VALID(option))
892 return NULL;
893
894 return &bond_opts[option];
895 }
896
bond_set_xfrm_features(struct bonding * bond)897 static bool bond_set_xfrm_features(struct bonding *bond)
898 {
899 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD))
900 return false;
901
902 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
903 bond->dev->wanted_features |= BOND_XFRM_FEATURES;
904 else
905 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES;
906
907 return true;
908 }
909
bond_option_mode_set(struct bonding * bond,const struct bond_opt_value * newval)910 static int bond_option_mode_set(struct bonding *bond,
911 const struct bond_opt_value *newval)
912 {
913 if (bond->xdp_prog && !bond_xdp_check(bond, newval->value))
914 return -EOPNOTSUPP;
915
916 if (!bond_mode_uses_arp(newval->value)) {
917 if (bond->params.arp_interval) {
918 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n",
919 newval->string);
920 /* disable arp monitoring */
921 WRITE_ONCE(bond->params.arp_interval, 0);
922 }
923
924 if (!bond->params.miimon) {
925 /* set miimon to default value */
926 WRITE_ONCE(bond->params.miimon, BOND_DEFAULT_MIIMON);
927 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n",
928 bond->params.miimon);
929 }
930 }
931
932 if (newval->value == BOND_MODE_ALB)
933 WRITE_ONCE(bond->params.tlb_dynamic_lb, 1);
934
935 /* don't cache arp_validate between modes */
936 WRITE_ONCE(bond->params.arp_validate, BOND_ARP_VALIDATE_NONE);
937 WRITE_ONCE(bond->params.mode, newval->value);
938
939 /* When changing mode, the bond device is down, we may reduce
940 * the bond_bcast_neigh_enabled in bond_close() if broadcast_neighbor
941 * enabled in 8023ad mode. Therefore, only clear broadcast_neighbor
942 * to 0.
943 */
944 WRITE_ONCE(bond->params.broadcast_neighbor, 0);
945
946 if (bond->dev->reg_state == NETREG_REGISTERED) {
947 bool update = false;
948
949 update |= bond_set_xfrm_features(bond);
950
951 if (update)
952 netdev_update_features(bond->dev);
953 }
954
955 bond_xdp_set_features(bond->dev);
956
957 return 0;
958 }
959
bond_option_active_slave_set(struct bonding * bond,const struct bond_opt_value * newval)960 static int bond_option_active_slave_set(struct bonding *bond,
961 const struct bond_opt_value *newval)
962 {
963 char ifname[IFNAMSIZ] = { 0, };
964 struct net_device *slave_dev;
965 int ret = 0;
966
967 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */
968 if (!strlen(ifname) || newval->string[0] == '\n') {
969 slave_dev = NULL;
970 } else {
971 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname);
972 if (!slave_dev)
973 return -ENODEV;
974 }
975
976 if (slave_dev) {
977 if (!netif_is_bond_slave(slave_dev)) {
978 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n");
979 return -EINVAL;
980 }
981
982 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) {
983 slave_err(bond->dev, slave_dev, "Device is not our slave\n");
984 return -EINVAL;
985 }
986 }
987
988 block_netpoll_tx();
989 /* check to see if we are clearing active */
990 if (!slave_dev) {
991 netdev_dbg(bond->dev, "Clearing current active slave\n");
992 bond_change_active_slave(bond, NULL);
993 bond_select_active_slave(bond);
994 } else {
995 struct slave *old_active = rtnl_dereference(bond->curr_active_slave);
996 struct slave *new_active = bond_slave_get_rtnl(slave_dev);
997
998 BUG_ON(!new_active);
999
1000 if (new_active == old_active) {
1001 /* do nothing */
1002 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n");
1003 } else {
1004 if (old_active && (new_active->link == BOND_LINK_UP) &&
1005 bond_slave_is_up(new_active)) {
1006 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n");
1007 bond_change_active_slave(bond, new_active);
1008 } else {
1009 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n",
1010 new_active->dev->name);
1011 ret = -EINVAL;
1012 }
1013 }
1014 }
1015 unblock_netpoll_tx();
1016
1017 return ret;
1018 }
1019
1020 /* There are two tricky bits here. First, if MII monitoring is activated, then
1021 * we must disable ARP monitoring. Second, if the timer isn't running, we must
1022 * start it.
1023 */
bond_option_miimon_set(struct bonding * bond,const struct bond_opt_value * newval)1024 static int bond_option_miimon_set(struct bonding *bond,
1025 const struct bond_opt_value *newval)
1026 {
1027 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n",
1028 newval->value);
1029 WRITE_ONCE(bond->params.miimon, newval->value);
1030 if (bond->params.updelay)
1031 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n",
1032 bond->params.updelay * bond->params.miimon);
1033 if (bond->params.downdelay)
1034 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n",
1035 bond->params.downdelay * bond->params.miimon);
1036 if (bond->params.peer_notif_delay)
1037 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n",
1038 bond->params.peer_notif_delay * bond->params.miimon);
1039 if (newval->value && bond->params.arp_interval) {
1040 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n");
1041 WRITE_ONCE(bond->params.arp_interval, 0);
1042 if (bond->params.arp_validate)
1043 WRITE_ONCE(bond->params.arp_validate,
1044 BOND_ARP_VALIDATE_NONE);
1045 }
1046 if (bond->dev->flags & IFF_UP) {
1047 /* If the interface is up, we may need to fire off
1048 * the MII timer. If the interface is down, the
1049 * timer will get fired off when the open function
1050 * is called.
1051 */
1052 if (!newval->value) {
1053 cancel_delayed_work_sync(&bond->mii_work);
1054 } else {
1055 cancel_delayed_work_sync(&bond->arp_work);
1056 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1057 }
1058 }
1059
1060 return 0;
1061 }
1062
1063 /* Set up, down and peer notification delays. These must be multiples
1064 * of the MII monitoring value, and are stored internally as the
1065 * multiplier. Thus, we must translate to MS for the real world.
1066 */
_bond_option_delay_set(struct bonding * bond,const struct bond_opt_value * newval,const char * name,int * target)1067 static int _bond_option_delay_set(struct bonding *bond,
1068 const struct bond_opt_value *newval,
1069 const char *name,
1070 int *target)
1071 {
1072 int value = newval->value;
1073
1074 if (!bond->params.miimon) {
1075 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n",
1076 name);
1077 return -EPERM;
1078 }
1079 if ((value % bond->params.miimon) != 0) {
1080 netdev_warn(bond->dev,
1081 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n",
1082 name,
1083 value, bond->params.miimon,
1084 (value / bond->params.miimon) *
1085 bond->params.miimon);
1086 }
1087 WRITE_ONCE(*target, value / bond->params.miimon);
1088 netdev_dbg(bond->dev, "Setting %s to %d\n",
1089 name,
1090 *target * bond->params.miimon);
1091
1092 return 0;
1093 }
1094
bond_option_updelay_set(struct bonding * bond,const struct bond_opt_value * newval)1095 static int bond_option_updelay_set(struct bonding *bond,
1096 const struct bond_opt_value *newval)
1097 {
1098 return _bond_option_delay_set(bond, newval, "up delay",
1099 &bond->params.updelay);
1100 }
1101
bond_option_downdelay_set(struct bonding * bond,const struct bond_opt_value * newval)1102 static int bond_option_downdelay_set(struct bonding *bond,
1103 const struct bond_opt_value *newval)
1104 {
1105 return _bond_option_delay_set(bond, newval, "down delay",
1106 &bond->params.downdelay);
1107 }
1108
bond_option_peer_notif_delay_set(struct bonding * bond,const struct bond_opt_value * newval)1109 static int bond_option_peer_notif_delay_set(struct bonding *bond,
1110 const struct bond_opt_value *newval)
1111 {
1112 int ret = _bond_option_delay_set(bond, newval,
1113 "peer notification delay",
1114 &bond->params.peer_notif_delay);
1115 return ret;
1116 }
1117
bond_option_use_carrier_set(struct bonding * bond,const struct bond_opt_value * newval)1118 static int bond_option_use_carrier_set(struct bonding *bond,
1119 const struct bond_opt_value *newval)
1120 {
1121 return 0;
1122 }
1123
1124 /* There are two tricky bits here. First, if ARP monitoring is activated, then
1125 * we must disable MII monitoring. Second, if the ARP timer isn't running,
1126 * we must start it.
1127 */
bond_option_arp_interval_set(struct bonding * bond,const struct bond_opt_value * newval)1128 static int bond_option_arp_interval_set(struct bonding *bond,
1129 const struct bond_opt_value *newval)
1130 {
1131 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n",
1132 newval->value);
1133 WRITE_ONCE(bond->params.arp_interval, newval->value);
1134 if (newval->value) {
1135 if (bond->params.miimon) {
1136 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n");
1137 WRITE_ONCE(bond->params.miimon, 0);
1138 }
1139 if (!bond->params.arp_targets[0])
1140 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n");
1141 }
1142 if (bond->dev->flags & IFF_UP) {
1143 /* If the interface is up, we may need to fire off
1144 * the ARP timer. If the interface is down, the
1145 * timer will get fired off when the open function
1146 * is called.
1147 */
1148 if (!newval->value) {
1149 if (bond->params.arp_validate)
1150 bond->recv_probe = NULL;
1151 cancel_delayed_work_sync(&bond->arp_work);
1152 } else {
1153 /* arp_validate can be set only in active-backup mode */
1154 bond->recv_probe = bond_rcv_validate;
1155 cancel_delayed_work_sync(&bond->mii_work);
1156 queue_delayed_work(bond->wq, &bond->arp_work, 0);
1157 }
1158 }
1159
1160 return 0;
1161 }
1162
_bond_options_arp_ip_target_set(struct bonding * bond,int slot,__be32 target,unsigned long last_rx)1163 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot,
1164 __be32 target,
1165 unsigned long last_rx)
1166 {
1167 __be32 *targets = bond->params.arp_targets;
1168 struct list_head *iter;
1169 struct slave *slave;
1170
1171 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) {
1172 bond_for_each_slave(bond, slave, iter)
1173 WRITE_ONCE(slave->target_last_arp_rx[slot], last_rx);
1174 WRITE_ONCE(targets[slot], target);
1175 }
1176 }
1177
_bond_option_arp_ip_target_add(struct bonding * bond,__be32 target)1178 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1179 {
1180 __be32 *targets = bond->params.arp_targets;
1181 int ind;
1182
1183 if (!bond_is_ip_target_ok(target)) {
1184 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n",
1185 &target);
1186 return -EINVAL;
1187 }
1188
1189 if (bond_get_targets_ip(targets, target) != -1) { /* dup */
1190 netdev_err(bond->dev, "ARP target %pI4 is already present\n",
1191 &target);
1192 return -EINVAL;
1193 }
1194
1195 ind = bond_get_targets_ip(targets, 0); /* first free slot */
1196 if (ind == -1) {
1197 netdev_err(bond->dev, "ARP target table is full!\n");
1198 return -EINVAL;
1199 }
1200
1201 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target);
1202
1203 _bond_options_arp_ip_target_set(bond, ind, target, jiffies);
1204
1205 return 0;
1206 }
1207
bond_option_arp_ip_target_add(struct bonding * bond,__be32 target)1208 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target)
1209 {
1210 return _bond_option_arp_ip_target_add(bond, target);
1211 }
1212
bond_option_arp_ip_target_rem(struct bonding * bond,__be32 target)1213 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target)
1214 {
1215 __be32 *targets = bond->params.arp_targets;
1216 struct list_head *iter;
1217 struct slave *slave;
1218 unsigned long *targets_rx;
1219 int ind, i;
1220
1221 if (!bond_is_ip_target_ok(target)) {
1222 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n",
1223 &target);
1224 return -EINVAL;
1225 }
1226
1227 ind = bond_get_targets_ip(targets, target);
1228 if (ind == -1) {
1229 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n",
1230 &target);
1231 return -EINVAL;
1232 }
1233
1234 if (ind == 0 && !targets[1] && bond->params.arp_interval)
1235 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n");
1236
1237 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target);
1238
1239 bond_for_each_slave(bond, slave, iter) {
1240 targets_rx = slave->target_last_arp_rx;
1241 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1242 WRITE_ONCE(targets_rx[i], READ_ONCE(targets_rx[i+1]));
1243 WRITE_ONCE(targets_rx[i], 0);
1244 }
1245 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++)
1246 WRITE_ONCE(targets[i], targets[i+1]);
1247 WRITE_ONCE(targets[i], 0);
1248
1249 return 0;
1250 }
1251
bond_option_arp_ip_targets_clear(struct bonding * bond)1252 void bond_option_arp_ip_targets_clear(struct bonding *bond)
1253 {
1254 int i;
1255
1256 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
1257 _bond_options_arp_ip_target_set(bond, i, 0, 0);
1258 }
1259
bond_option_arp_ip_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1260 static int bond_option_arp_ip_targets_set(struct bonding *bond,
1261 const struct bond_opt_value *newval)
1262 {
1263 int ret = -EPERM;
1264 __be32 target;
1265
1266 if (newval->string) {
1267 if (strlen(newval->string) < 1 ||
1268 !in4_pton(newval->string + 1, -1, (u8 *)&target, -1, NULL)) {
1269 netdev_err(bond->dev, "invalid ARP target specified\n");
1270 return ret;
1271 }
1272 if (newval->string[0] == '+')
1273 ret = bond_option_arp_ip_target_add(bond, target);
1274 else if (newval->string[0] == '-')
1275 ret = bond_option_arp_ip_target_rem(bond, target);
1276 else
1277 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n");
1278 } else {
1279 target = newval->value;
1280 ret = bond_option_arp_ip_target_add(bond, target);
1281 }
1282
1283 return ret;
1284 }
1285
1286 #if IS_ENABLED(CONFIG_IPV6)
slave_can_set_ns_maddr(const struct bonding * bond,struct slave * slave)1287 static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave)
1288 {
1289 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
1290 !bond_is_active_slave(slave) &&
1291 slave->dev->flags & IFF_MULTICAST;
1292 }
1293
1294 /**
1295 * slave_set_ns_maddrs - add/del all NS mac addresses for slave
1296 * @bond: bond device
1297 * @slave: slave device
1298 * @add: add or remove all the NS mac addresses
1299 *
1300 * This function tries to add or delete all the NS mac addresses on the slave
1301 *
1302 * Note, the IPv6 NS target address is the unicast address in Neighbor
1303 * Solicitation (NS) message. The dest address of NS message should be
1304 * solicited-node multicast address of the target. The dest mac of NS message
1305 * is converted from the solicited-node multicast address.
1306 *
1307 * This function is called when
1308 * * arp_validate changes
1309 * * enslaving, releasing new slaves
1310 */
slave_set_ns_maddrs(struct bonding * bond,struct slave * slave,bool add)1311 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add)
1312 {
1313 struct in6_addr *targets = bond->params.ns_targets;
1314 char slot_maddr[MAX_ADDR_LEN];
1315 struct in6_addr mcaddr;
1316 int i;
1317
1318 if (!slave_can_set_ns_maddr(bond, slave))
1319 return;
1320
1321 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) {
1322 if (ipv6_addr_any(&targets[i]))
1323 break;
1324
1325 addrconf_addr_solict_mult(&targets[i], &mcaddr);
1326 if (!ndisc_mc_map(&mcaddr, slot_maddr, slave->dev, 0)) {
1327 if (add)
1328 dev_mc_add(slave->dev, slot_maddr);
1329 else
1330 dev_mc_del(slave->dev, slot_maddr);
1331 }
1332 }
1333 }
1334
bond_slave_ns_maddrs_add(struct bonding * bond,struct slave * slave)1335 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave)
1336 {
1337 if (!bond->params.arp_validate)
1338 return;
1339 slave_set_ns_maddrs(bond, slave, true);
1340 }
1341
bond_slave_ns_maddrs_del(struct bonding * bond,struct slave * slave)1342 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave)
1343 {
1344 if (!bond->params.arp_validate)
1345 return;
1346 slave_set_ns_maddrs(bond, slave, false);
1347 }
1348
1349 /**
1350 * slave_set_ns_maddr - set new NS mac address for slave
1351 * @bond: bond device
1352 * @slave: slave device
1353 * @target: the new IPv6 target
1354 * @slot: the old IPv6 target in the slot
1355 *
1356 * This function tries to replace the old mac address to new one on the slave.
1357 *
1358 * Note, the target/slot IPv6 address is the unicast address in Neighbor
1359 * Solicitation (NS) message. The dest address of NS message should be
1360 * solicited-node multicast address of the target. The dest mac of NS message
1361 * is converted from the solicited-node multicast address.
1362 *
1363 * This function is called when
1364 * * An IPv6 NS target is added or removed.
1365 */
slave_set_ns_maddr(struct bonding * bond,struct slave * slave,struct in6_addr * target,struct in6_addr * slot)1366 static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave,
1367 struct in6_addr *target, struct in6_addr *slot)
1368 {
1369 char mac_addr[MAX_ADDR_LEN];
1370 struct in6_addr mcast_addr;
1371
1372 if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave))
1373 return;
1374
1375 /* remove the previous mac addr from slave */
1376 addrconf_addr_solict_mult(slot, &mcast_addr);
1377 if (!ipv6_addr_any(slot) &&
1378 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0))
1379 dev_mc_del(slave->dev, mac_addr);
1380
1381 /* add new mac addr on slave if target is set */
1382 addrconf_addr_solict_mult(target, &mcast_addr);
1383 if (!ipv6_addr_any(target) &&
1384 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0))
1385 dev_mc_add(slave->dev, mac_addr);
1386 }
1387
_bond_options_ns_ip6_target_set(struct bonding * bond,int slot,struct in6_addr * target,unsigned long last_rx)1388 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot,
1389 struct in6_addr *target,
1390 unsigned long last_rx)
1391 {
1392 struct in6_addr *targets = bond->params.ns_targets;
1393 struct list_head *iter;
1394 struct slave *slave;
1395
1396 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) {
1397 bond_for_each_slave(bond, slave, iter) {
1398 WRITE_ONCE(slave->target_last_arp_rx[slot], last_rx);
1399 slave_set_ns_maddr(bond, slave, target, &targets[slot]);
1400 }
1401 targets[slot] = *target;
1402 }
1403 }
1404
bond_option_ns_ip6_targets_clear(struct bonding * bond)1405 void bond_option_ns_ip6_targets_clear(struct bonding *bond)
1406 {
1407 struct in6_addr addr_any = in6addr_any;
1408 int i;
1409
1410 for (i = 0; i < BOND_MAX_NS_TARGETS; i++)
1411 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0);
1412 }
1413
bond_option_ns_ip6_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1414 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1415 const struct bond_opt_value *newval)
1416 {
1417 struct in6_addr *target = (struct in6_addr *)newval->extra;
1418 struct in6_addr *targets = bond->params.ns_targets;
1419 struct in6_addr addr_any = in6addr_any;
1420 int index;
1421
1422 if (!bond_is_ip6_target_ok(target)) {
1423 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n",
1424 target);
1425 return -EINVAL;
1426 }
1427
1428 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */
1429 netdev_err(bond->dev, "NS target %pI6c is already present\n",
1430 target);
1431 return -EINVAL;
1432 }
1433
1434 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */
1435 if (index == -1) {
1436 netdev_err(bond->dev, "NS target table is full!\n");
1437 return -EINVAL;
1438 }
1439
1440 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target);
1441
1442 _bond_options_ns_ip6_target_set(bond, index, target, jiffies);
1443
1444 return 0;
1445 }
1446 #else
bond_option_ns_ip6_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1447 static int bond_option_ns_ip6_targets_set(struct bonding *bond,
1448 const struct bond_opt_value *newval)
1449 {
1450 return -EPERM;
1451 }
1452
slave_set_ns_maddrs(struct bonding * bond,struct slave * slave,bool add)1453 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {}
1454
bond_slave_ns_maddrs_add(struct bonding * bond,struct slave * slave)1455 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {}
1456
bond_slave_ns_maddrs_del(struct bonding * bond,struct slave * slave)1457 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {}
1458 #endif
1459
bond_option_arp_validate_set(struct bonding * bond,const struct bond_opt_value * newval)1460 static int bond_option_arp_validate_set(struct bonding *bond,
1461 const struct bond_opt_value *newval)
1462 {
1463 bool changed = !!bond->params.arp_validate != !!newval->value;
1464 struct list_head *iter;
1465 struct slave *slave;
1466
1467 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n",
1468 newval->string, newval->value);
1469 WRITE_ONCE(bond->params.arp_validate, newval->value);
1470
1471 if (changed) {
1472 bond_for_each_slave(bond, slave, iter)
1473 slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate);
1474 }
1475
1476 return 0;
1477 }
1478
bond_option_arp_all_targets_set(struct bonding * bond,const struct bond_opt_value * newval)1479 static int bond_option_arp_all_targets_set(struct bonding *bond,
1480 const struct bond_opt_value *newval)
1481 {
1482 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n",
1483 newval->string, newval->value);
1484 WRITE_ONCE(bond->params.arp_all_targets, newval->value);
1485
1486 return 0;
1487 }
1488
bond_option_missed_max_set(struct bonding * bond,const struct bond_opt_value * newval)1489 static int bond_option_missed_max_set(struct bonding *bond,
1490 const struct bond_opt_value *newval)
1491 {
1492 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n",
1493 newval->string, newval->value);
1494 WRITE_ONCE(bond->params.missed_max, newval->value);
1495
1496 return 0;
1497 }
1498
bond_option_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1499 static int bond_option_prio_set(struct bonding *bond,
1500 const struct bond_opt_value *newval)
1501 {
1502 struct slave *slave;
1503
1504 slave = bond_slave_get_rtnl(newval->slave_dev);
1505 if (!slave) {
1506 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
1507 return -ENODEV;
1508 }
1509 slave->prio = newval->value;
1510
1511 if (rtnl_dereference(bond->primary_slave))
1512 slave_warn(bond->dev, slave->dev,
1513 "prio updated, but will not affect failover re-selection as primary slave have been set\n");
1514 else
1515 bond_select_active_slave(bond);
1516
1517 return 0;
1518 }
1519
bond_option_primary_set(struct bonding * bond,const struct bond_opt_value * newval)1520 static int bond_option_primary_set(struct bonding *bond,
1521 const struct bond_opt_value *newval)
1522 {
1523 char *p, *primary = newval->string;
1524 struct list_head *iter;
1525 struct slave *slave;
1526
1527 block_netpoll_tx();
1528
1529 p = strchr(primary, '\n');
1530 if (p)
1531 *p = '\0';
1532 /* check to see if we are clearing primary */
1533 if (!strlen(primary)) {
1534 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1535 RCU_INIT_POINTER(bond->primary_slave, NULL);
1536 memset(bond->params.primary, 0, sizeof(bond->params.primary));
1537 bond_select_active_slave(bond);
1538 goto out;
1539 }
1540
1541 bond_for_each_slave(bond, slave, iter) {
1542 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) {
1543 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n");
1544 rcu_assign_pointer(bond->primary_slave, slave);
1545 strcpy(bond->params.primary, slave->dev->name);
1546 bond->force_primary = true;
1547 bond_select_active_slave(bond);
1548 goto out;
1549 }
1550 }
1551
1552 if (rtnl_dereference(bond->primary_slave)) {
1553 netdev_dbg(bond->dev, "Setting primary slave to None\n");
1554 RCU_INIT_POINTER(bond->primary_slave, NULL);
1555 bond_select_active_slave(bond);
1556 }
1557 strscpy_pad(bond->params.primary, primary, IFNAMSIZ);
1558
1559 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n",
1560 primary);
1561
1562 out:
1563 unblock_netpoll_tx();
1564
1565 return 0;
1566 }
1567
bond_option_primary_reselect_set(struct bonding * bond,const struct bond_opt_value * newval)1568 static int bond_option_primary_reselect_set(struct bonding *bond,
1569 const struct bond_opt_value *newval)
1570 {
1571 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n",
1572 newval->string, newval->value);
1573 WRITE_ONCE(bond->params.primary_reselect, newval->value);
1574
1575 block_netpoll_tx();
1576 bond_select_active_slave(bond);
1577 unblock_netpoll_tx();
1578
1579 return 0;
1580 }
1581
bond_option_fail_over_mac_set(struct bonding * bond,const struct bond_opt_value * newval)1582 static int bond_option_fail_over_mac_set(struct bonding *bond,
1583 const struct bond_opt_value *newval)
1584 {
1585 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n",
1586 newval->string, newval->value);
1587 WRITE_ONCE(bond->params.fail_over_mac, newval->value);
1588
1589 return 0;
1590 }
1591
bond_option_xmit_hash_policy_set(struct bonding * bond,const struct bond_opt_value * newval)1592 static int bond_option_xmit_hash_policy_set(struct bonding *bond,
1593 const struct bond_opt_value *newval)
1594 {
1595 if (bond->xdp_prog && !__bond_xdp_check(BOND_MODE(bond), newval->value))
1596 return -EOPNOTSUPP;
1597 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n",
1598 newval->string, newval->value);
1599 WRITE_ONCE(bond->params.xmit_policy, newval->value);
1600
1601 return 0;
1602 }
1603
bond_option_resend_igmp_set(struct bonding * bond,const struct bond_opt_value * newval)1604 static int bond_option_resend_igmp_set(struct bonding *bond,
1605 const struct bond_opt_value *newval)
1606 {
1607 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n",
1608 newval->value);
1609 WRITE_ONCE(bond->params.resend_igmp, newval->value);
1610
1611 return 0;
1612 }
1613
bond_option_num_peer_notif_set(struct bonding * bond,const struct bond_opt_value * newval)1614 static int bond_option_num_peer_notif_set(struct bonding *bond,
1615 const struct bond_opt_value *newval)
1616 {
1617 WRITE_ONCE(bond->params.num_peer_notif, newval->value);
1618
1619 return 0;
1620 }
1621
bond_option_all_slaves_active_set(struct bonding * bond,const struct bond_opt_value * newval)1622 static int bond_option_all_slaves_active_set(struct bonding *bond,
1623 const struct bond_opt_value *newval)
1624 {
1625 struct list_head *iter;
1626 struct slave *slave;
1627
1628 if (newval->value == bond->params.all_slaves_active)
1629 return 0;
1630 WRITE_ONCE(bond->params.all_slaves_active, newval->value);
1631 bond_for_each_slave(bond, slave, iter) {
1632 if (!bond_is_active_slave(slave)) {
1633 if (newval->value)
1634 slave->inactive = 0;
1635 else
1636 slave->inactive = 1;
1637 }
1638 }
1639
1640 return 0;
1641 }
1642
bond_option_min_links_set(struct bonding * bond,const struct bond_opt_value * newval)1643 static int bond_option_min_links_set(struct bonding *bond,
1644 const struct bond_opt_value *newval)
1645 {
1646 netdev_dbg(bond->dev, "Setting min links value to %llu\n",
1647 newval->value);
1648 WRITE_ONCE(bond->params.min_links, newval->value);
1649 bond_set_carrier(bond);
1650
1651 return 0;
1652 }
1653
bond_option_lp_interval_set(struct bonding * bond,const struct bond_opt_value * newval)1654 static int bond_option_lp_interval_set(struct bonding *bond,
1655 const struct bond_opt_value *newval)
1656 {
1657 WRITE_ONCE(bond->params.lp_interval, newval->value);
1658
1659 return 0;
1660 }
1661
bond_option_pps_set(struct bonding * bond,const struct bond_opt_value * newval)1662 static int bond_option_pps_set(struct bonding *bond,
1663 const struct bond_opt_value *newval)
1664 {
1665 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n",
1666 newval->value);
1667 WRITE_ONCE(bond->params.packets_per_slave, newval->value);
1668 if (newval->value > 0) {
1669 bond->params.reciprocal_packets_per_slave =
1670 reciprocal_value(newval->value);
1671 } else {
1672 /* reciprocal_packets_per_slave is unused if
1673 * packets_per_slave is 0 or 1, just initialize it
1674 */
1675 bond->params.reciprocal_packets_per_slave =
1676 (struct reciprocal_value) { 0 };
1677 }
1678
1679 return 0;
1680 }
1681
bond_option_lacp_active_set(struct bonding * bond,const struct bond_opt_value * newval)1682 static int bond_option_lacp_active_set(struct bonding *bond,
1683 const struct bond_opt_value *newval)
1684 {
1685 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n",
1686 newval->string, newval->value);
1687 WRITE_ONCE(bond->params.lacp_active, newval->value);
1688 bond_3ad_update_lacp_active(bond);
1689
1690 return 0;
1691 }
1692
bond_option_lacp_rate_set(struct bonding * bond,const struct bond_opt_value * newval)1693 static int bond_option_lacp_rate_set(struct bonding *bond,
1694 const struct bond_opt_value *newval)
1695 {
1696 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n",
1697 newval->string, newval->value);
1698 WRITE_ONCE(bond->params.lacp_fast, newval->value);
1699 bond_3ad_update_lacp_rate(bond);
1700
1701 return 0;
1702 }
1703
bond_option_lacp_strict_set(struct bonding * bond,const struct bond_opt_value * newval)1704 static int bond_option_lacp_strict_set(struct bonding *bond,
1705 const struct bond_opt_value *newval)
1706 {
1707 netdev_dbg(bond->dev, "Setting LACP fallback to %s (%llu)\n",
1708 newval->string, newval->value);
1709 WRITE_ONCE(bond->params.lacp_strict, newval->value);
1710 bond_3ad_set_carrier(bond);
1711
1712 return 0;
1713 }
1714
bond_option_ad_select_set(struct bonding * bond,const struct bond_opt_value * newval)1715 static int bond_option_ad_select_set(struct bonding *bond,
1716 const struct bond_opt_value *newval)
1717 {
1718 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n",
1719 newval->string, newval->value);
1720 WRITE_ONCE(bond->params.ad_select, newval->value);
1721
1722 return 0;
1723 }
1724
bond_option_queue_id_set(struct bonding * bond,const struct bond_opt_value * newval)1725 static int bond_option_queue_id_set(struct bonding *bond,
1726 const struct bond_opt_value *newval)
1727 {
1728 struct slave *slave, *update_slave;
1729 struct net_device *sdev;
1730 struct list_head *iter;
1731 char *delim;
1732 int ret = 0;
1733 u16 qid;
1734
1735 /* delim will point to queue id if successful */
1736 delim = strchr(newval->string, ':');
1737 if (!delim)
1738 goto err_no_cmd;
1739
1740 /* Terminate string that points to device name and bump it
1741 * up one, so we can read the queue id there.
1742 */
1743 *delim = '\0';
1744 if (sscanf(++delim, "%hd\n", &qid) != 1)
1745 goto err_no_cmd;
1746
1747 /* Check buffer length, valid ifname and queue id */
1748 if (!dev_valid_name(newval->string) ||
1749 qid > bond->dev->real_num_tx_queues)
1750 goto err_no_cmd;
1751
1752 /* Get the pointer to that interface if it exists */
1753 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string);
1754 if (!sdev)
1755 goto err_no_cmd;
1756
1757 /* Search for thes slave and check for duplicate qids */
1758 update_slave = NULL;
1759 bond_for_each_slave(bond, slave, iter) {
1760 if (sdev == slave->dev)
1761 /* We don't need to check the matching
1762 * slave for dups, since we're overwriting it
1763 */
1764 update_slave = slave;
1765 else if (qid && qid == slave->queue_id) {
1766 goto err_no_cmd;
1767 }
1768 }
1769
1770 if (!update_slave)
1771 goto err_no_cmd;
1772
1773 /* Actually set the qids for the slave */
1774 WRITE_ONCE(update_slave->queue_id, qid);
1775
1776 out:
1777 return ret;
1778
1779 err_no_cmd:
1780 netdev_dbg(bond->dev, "invalid input for queue_id set\n");
1781 ret = -EPERM;
1782 goto out;
1783
1784 }
1785
bond_option_slaves_set(struct bonding * bond,const struct bond_opt_value * newval)1786 static int bond_option_slaves_set(struct bonding *bond,
1787 const struct bond_opt_value *newval)
1788 {
1789 char command[IFNAMSIZ + 1] = { 0, };
1790 struct net_device *dev;
1791 char *ifname;
1792 int ret;
1793
1794 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/
1795 ifname = command + 1;
1796 if ((strlen(command) <= 1) ||
1797 (command[0] != '+' && command[0] != '-') ||
1798 !dev_valid_name(ifname))
1799 goto err_no_cmd;
1800
1801 dev = __dev_get_by_name(dev_net(bond->dev), ifname);
1802 if (!dev) {
1803 netdev_dbg(bond->dev, "interface %s does not exist!\n",
1804 ifname);
1805 ret = -ENODEV;
1806 goto out;
1807 }
1808
1809 switch (command[0]) {
1810 case '+':
1811 slave_dbg(bond->dev, dev, "Enslaving interface\n");
1812 ret = bond_enslave(bond->dev, dev, NULL);
1813 break;
1814
1815 case '-':
1816 slave_dbg(bond->dev, dev, "Releasing interface\n");
1817 ret = bond_release(bond->dev, dev);
1818 break;
1819
1820 default:
1821 /* should not run here. */
1822 goto err_no_cmd;
1823 }
1824
1825 out:
1826 return ret;
1827
1828 err_no_cmd:
1829 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n");
1830 ret = -EPERM;
1831 goto out;
1832 }
1833
bond_option_tlb_dynamic_lb_set(struct bonding * bond,const struct bond_opt_value * newval)1834 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond,
1835 const struct bond_opt_value *newval)
1836 {
1837 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n",
1838 newval->string, newval->value);
1839 WRITE_ONCE(bond->params.tlb_dynamic_lb, newval->value);
1840
1841 return 0;
1842 }
1843
bond_option_ad_actor_sys_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1844 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond,
1845 const struct bond_opt_value *newval)
1846 {
1847 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n",
1848 newval->value);
1849
1850 WRITE_ONCE(bond->params.ad_actor_sys_prio, newval->value);
1851 bond_3ad_update_ad_actor_settings(bond);
1852
1853 return 0;
1854 }
1855
bond_option_actor_port_prio_set(struct bonding * bond,const struct bond_opt_value * newval)1856 static int bond_option_actor_port_prio_set(struct bonding *bond,
1857 const struct bond_opt_value *newval)
1858 {
1859 struct slave *slave;
1860
1861 slave = bond_slave_get_rtnl(newval->slave_dev);
1862 if (!slave) {
1863 netdev_dbg(bond->dev, "%s called on NULL slave\n", __func__);
1864 return -ENODEV;
1865 }
1866
1867 netdev_dbg(newval->slave_dev, "Setting actor_port_prio to %llu\n",
1868 newval->value);
1869
1870 SLAVE_AD_INFO(slave)->port_priority = newval->value;
1871 bond_3ad_update_ad_actor_settings(bond);
1872
1873 return 0;
1874 }
1875
bond_option_ad_actor_system_set(struct bonding * bond,const struct bond_opt_value * newval)1876 static int bond_option_ad_actor_system_set(struct bonding *bond,
1877 const struct bond_opt_value *newval)
1878 {
1879 u8 macaddr[ETH_ALEN];
1880 u8 *mac;
1881
1882 if (newval->string) {
1883 if (!mac_pton(newval->string, macaddr))
1884 goto err;
1885 mac = macaddr;
1886 } else {
1887 mac = (u8 *)&newval->value;
1888 }
1889
1890 if (is_multicast_ether_addr(mac))
1891 goto err;
1892
1893 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac);
1894 ether_addr_copy(bond->params.ad_actor_system, mac);
1895 bond_3ad_update_ad_actor_settings(bond);
1896
1897 return 0;
1898
1899 err:
1900 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n");
1901 return -EINVAL;
1902 }
1903
bond_option_ad_user_port_key_set(struct bonding * bond,const struct bond_opt_value * newval)1904 static int bond_option_ad_user_port_key_set(struct bonding *bond,
1905 const struct bond_opt_value *newval)
1906 {
1907 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n",
1908 newval->value);
1909
1910 WRITE_ONCE(bond->params.ad_user_port_key, newval->value);
1911 return 0;
1912 }
1913
bond_option_coupled_control_set(struct bonding * bond,const struct bond_opt_value * newval)1914 static int bond_option_coupled_control_set(struct bonding *bond,
1915 const struct bond_opt_value *newval)
1916 {
1917 netdev_info(bond->dev, "Setting coupled_control to %s (%llu)\n",
1918 newval->string, newval->value);
1919
1920 WRITE_ONCE(bond->params.coupled_control, newval->value);
1921 return 0;
1922 }
1923
bond_option_broadcast_neigh_set(struct bonding * bond,const struct bond_opt_value * newval)1924 static int bond_option_broadcast_neigh_set(struct bonding *bond,
1925 const struct bond_opt_value *newval)
1926 {
1927 if (bond->params.broadcast_neighbor == newval->value)
1928 return 0;
1929
1930 WRITE_ONCE(bond->params.broadcast_neighbor, newval->value);
1931 if (bond->dev->flags & IFF_UP) {
1932 if (bond->params.broadcast_neighbor)
1933 static_branch_inc(&bond_bcast_neigh_enabled);
1934 else
1935 static_branch_dec(&bond_bcast_neigh_enabled);
1936 }
1937
1938 netdev_dbg(bond->dev, "Setting broadcast_neighbor to %s (%llu)\n",
1939 newval->string, newval->value);
1940 return 0;
1941 }
1942