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