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