1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/net/bond/bond_options.c - bonding options 4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> 5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> 6 */ 7 8 #include <linux/errno.h> 9 #include <linux/if.h> 10 #include <linux/netdevice.h> 11 #include <linux/spinlock.h> 12 #include <linux/rcupdate.h> 13 #include <linux/ctype.h> 14 #include <linux/inet.h> 15 #include <linux/sched/signal.h> 16 17 #include <net/bonding.h> 18 #include <net/ndisc.h> 19 20 static int bond_option_active_slave_set(struct bonding *bond, 21 const struct bond_opt_value *newval); 22 static int bond_option_miimon_set(struct bonding *bond, 23 const struct bond_opt_value *newval); 24 static int bond_option_updelay_set(struct bonding *bond, 25 const struct bond_opt_value *newval); 26 static int bond_option_downdelay_set(struct bonding *bond, 27 const struct bond_opt_value *newval); 28 static int bond_option_peer_notif_delay_set(struct bonding *bond, 29 const struct bond_opt_value *newval); 30 static int bond_option_use_carrier_set(struct bonding *bond, 31 const struct bond_opt_value *newval); 32 static int bond_option_arp_interval_set(struct bonding *bond, 33 const struct bond_opt_value *newval); 34 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target); 35 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target); 36 static int bond_option_arp_ip_targets_set(struct bonding *bond, 37 const struct bond_opt_value *newval); 38 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 39 const struct bond_opt_value *newval); 40 static int bond_option_arp_validate_set(struct bonding *bond, 41 const struct bond_opt_value *newval); 42 static int bond_option_arp_all_targets_set(struct bonding *bond, 43 const struct bond_opt_value *newval); 44 static int bond_option_prio_set(struct bonding *bond, 45 const struct bond_opt_value *newval); 46 static int bond_option_primary_set(struct bonding *bond, 47 const struct bond_opt_value *newval); 48 static int bond_option_primary_reselect_set(struct bonding *bond, 49 const struct bond_opt_value *newval); 50 static int bond_option_fail_over_mac_set(struct bonding *bond, 51 const struct bond_opt_value *newval); 52 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 53 const struct bond_opt_value *newval); 54 static int bond_option_resend_igmp_set(struct bonding *bond, 55 const struct bond_opt_value *newval); 56 static int bond_option_num_peer_notif_set(struct bonding *bond, 57 const struct bond_opt_value *newval); 58 static int bond_option_all_slaves_active_set(struct bonding *bond, 59 const struct bond_opt_value *newval); 60 static int bond_option_min_links_set(struct bonding *bond, 61 const struct bond_opt_value *newval); 62 static int bond_option_lp_interval_set(struct bonding *bond, 63 const struct bond_opt_value *newval); 64 static int bond_option_pps_set(struct bonding *bond, 65 const struct bond_opt_value *newval); 66 static int bond_option_lacp_active_set(struct bonding *bond, 67 const struct bond_opt_value *newval); 68 static int bond_option_lacp_rate_set(struct bonding *bond, 69 const struct bond_opt_value *newval); 70 static int bond_option_ad_select_set(struct bonding *bond, 71 const struct bond_opt_value *newval); 72 static int bond_option_queue_id_set(struct bonding *bond, 73 const struct bond_opt_value *newval); 74 static int bond_option_mode_set(struct bonding *bond, 75 const struct bond_opt_value *newval); 76 static int bond_option_slaves_set(struct bonding *bond, 77 const struct bond_opt_value *newval); 78 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 79 const struct bond_opt_value *newval); 80 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 81 const struct bond_opt_value *newval); 82 static int bond_option_ad_actor_system_set(struct bonding *bond, 83 const struct bond_opt_value *newval); 84 static int bond_option_ad_user_port_key_set(struct bonding *bond, 85 const struct bond_opt_value *newval); 86 static int bond_option_missed_max_set(struct bonding *bond, 87 const struct bond_opt_value *newval); 88 static int bond_option_coupled_control_set(struct bonding *bond, 89 const struct bond_opt_value *newval); 90 static int bond_option_broadcast_neigh_set(struct bonding *bond, 91 const struct bond_opt_value *newval); 92 93 static const struct bond_opt_value bond_mode_tbl[] = { 94 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT}, 95 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0}, 96 { "balance-xor", BOND_MODE_XOR, 0}, 97 { "broadcast", BOND_MODE_BROADCAST, 0}, 98 { "802.3ad", BOND_MODE_8023AD, 0}, 99 { "balance-tlb", BOND_MODE_TLB, 0}, 100 { "balance-alb", BOND_MODE_ALB, 0}, 101 { NULL, -1, 0}, 102 }; 103 104 static const struct bond_opt_value bond_pps_tbl[] = { 105 { "default", 1, BOND_VALFLAG_DEFAULT}, 106 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX}, 107 { NULL, -1, 0}, 108 }; 109 110 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = { 111 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT}, 112 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0}, 113 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0}, 114 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0}, 115 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0}, 116 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0}, 117 { NULL, -1, 0}, 118 }; 119 120 static const struct bond_opt_value bond_arp_validate_tbl[] = { 121 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT}, 122 { "active", BOND_ARP_VALIDATE_ACTIVE, 0}, 123 { "backup", BOND_ARP_VALIDATE_BACKUP, 0}, 124 { "all", BOND_ARP_VALIDATE_ALL, 0}, 125 { "filter", BOND_ARP_FILTER, 0}, 126 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0}, 127 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0}, 128 { NULL, -1, 0}, 129 }; 130 131 static const struct bond_opt_value bond_arp_all_targets_tbl[] = { 132 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT}, 133 { "all", BOND_ARP_TARGETS_ALL, 0}, 134 { NULL, -1, 0}, 135 }; 136 137 static const struct bond_opt_value bond_fail_over_mac_tbl[] = { 138 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT}, 139 { "active", BOND_FOM_ACTIVE, 0}, 140 { "follow", BOND_FOM_FOLLOW, 0}, 141 { NULL, -1, 0}, 142 }; 143 144 static const struct bond_opt_value bond_intmax_tbl[] = { 145 { "off", 0, BOND_VALFLAG_DEFAULT}, 146 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 147 { NULL, -1, 0} 148 }; 149 150 static const struct bond_opt_value bond_lacp_active[] = { 151 { "off", 0, 0}, 152 { "on", 1, BOND_VALFLAG_DEFAULT}, 153 { NULL, -1, 0} 154 }; 155 156 static const struct bond_opt_value bond_lacp_rate_tbl[] = { 157 { "slow", AD_LACP_SLOW, 0}, 158 { "fast", AD_LACP_FAST, 0}, 159 { NULL, -1, 0}, 160 }; 161 162 static const struct bond_opt_value bond_ad_select_tbl[] = { 163 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT}, 164 { "bandwidth", BOND_AD_BANDWIDTH, 0}, 165 { "count", BOND_AD_COUNT, 0}, 166 { NULL, -1, 0}, 167 }; 168 169 static const struct bond_opt_value bond_num_peer_notif_tbl[] = { 170 { "off", 0, 0}, 171 { "maxval", 255, BOND_VALFLAG_MAX}, 172 { "default", 1, BOND_VALFLAG_DEFAULT}, 173 { NULL, -1, 0} 174 }; 175 176 static const struct bond_opt_value bond_peer_notif_delay_tbl[] = { 177 { "off", 0, 0}, 178 { "maxval", 300000, BOND_VALFLAG_MAX}, 179 { NULL, -1, 0} 180 }; 181 182 static const struct bond_opt_value bond_primary_reselect_tbl[] = { 183 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT}, 184 { "better", BOND_PRI_RESELECT_BETTER, 0}, 185 { "failure", BOND_PRI_RESELECT_FAILURE, 0}, 186 { NULL, -1}, 187 }; 188 189 static const struct bond_opt_value bond_use_carrier_tbl[] = { 190 { "off", 0, 0}, 191 { "on", 1, BOND_VALFLAG_DEFAULT}, 192 { NULL, -1, 0} 193 }; 194 195 static const struct bond_opt_value bond_all_slaves_active_tbl[] = { 196 { "off", 0, BOND_VALFLAG_DEFAULT}, 197 { "on", 1, 0}, 198 { NULL, -1, 0} 199 }; 200 201 static const struct bond_opt_value bond_resend_igmp_tbl[] = { 202 { "off", 0, 0}, 203 { "maxval", 255, BOND_VALFLAG_MAX}, 204 { "default", 1, BOND_VALFLAG_DEFAULT}, 205 { NULL, -1, 0} 206 }; 207 208 static const struct bond_opt_value bond_lp_interval_tbl[] = { 209 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, 210 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 211 { NULL, -1, 0}, 212 }; 213 214 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = { 215 { "off", 0, 0}, 216 { "on", 1, BOND_VALFLAG_DEFAULT}, 217 { NULL, -1, 0} 218 }; 219 220 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = { 221 { "minval", 1, BOND_VALFLAG_MIN}, 222 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT}, 223 { NULL, -1, 0}, 224 }; 225 226 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = { 227 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, 228 { "maxval", 1023, BOND_VALFLAG_MAX}, 229 { NULL, -1, 0}, 230 }; 231 232 static const struct bond_opt_value bond_missed_max_tbl[] = { 233 { "minval", 1, BOND_VALFLAG_MIN}, 234 { "maxval", 255, BOND_VALFLAG_MAX}, 235 { "default", 2, BOND_VALFLAG_DEFAULT}, 236 { NULL, -1, 0}, 237 }; 238 239 static const struct bond_opt_value bond_coupled_control_tbl[] = { 240 { "on", 1, BOND_VALFLAG_DEFAULT}, 241 { "off", 0, 0}, 242 { NULL, -1, 0}, 243 }; 244 245 static const struct bond_opt_value bond_broadcast_neigh_tbl[] = { 246 { "off", 0, BOND_VALFLAG_DEFAULT}, 247 { "on", 1, 0}, 248 { NULL, -1, 0} 249 }; 250 251 static const struct bond_option bond_opts[BOND_OPT_LAST] = { 252 [BOND_OPT_MODE] = { 253 .id = BOND_OPT_MODE, 254 .name = "mode", 255 .desc = "bond device mode", 256 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN, 257 .values = bond_mode_tbl, 258 .set = bond_option_mode_set 259 }, 260 [BOND_OPT_PACKETS_PER_SLAVE] = { 261 .id = BOND_OPT_PACKETS_PER_SLAVE, 262 .name = "packets_per_slave", 263 .desc = "Packets to send per slave in RR mode", 264 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)), 265 .values = bond_pps_tbl, 266 .set = bond_option_pps_set 267 }, 268 [BOND_OPT_XMIT_HASH] = { 269 .id = BOND_OPT_XMIT_HASH, 270 .name = "xmit_hash_policy", 271 .desc = "balance-xor, 802.3ad, and tlb hashing method", 272 .values = bond_xmit_hashtype_tbl, 273 .set = bond_option_xmit_hash_policy_set 274 }, 275 [BOND_OPT_ARP_VALIDATE] = { 276 .id = BOND_OPT_ARP_VALIDATE, 277 .name = "arp_validate", 278 .desc = "validate src/dst of ARP probes", 279 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 280 BIT(BOND_MODE_ALB), 281 .values = bond_arp_validate_tbl, 282 .set = bond_option_arp_validate_set 283 }, 284 [BOND_OPT_ARP_ALL_TARGETS] = { 285 .id = BOND_OPT_ARP_ALL_TARGETS, 286 .name = "arp_all_targets", 287 .desc = "fail on any/all arp targets timeout", 288 .values = bond_arp_all_targets_tbl, 289 .set = bond_option_arp_all_targets_set 290 }, 291 [BOND_OPT_FAIL_OVER_MAC] = { 292 .id = BOND_OPT_FAIL_OVER_MAC, 293 .name = "fail_over_mac", 294 .desc = "For active-backup, do not set all slaves to the same MAC", 295 .flags = BOND_OPTFLAG_NOSLAVES, 296 .values = bond_fail_over_mac_tbl, 297 .set = bond_option_fail_over_mac_set 298 }, 299 [BOND_OPT_ARP_INTERVAL] = { 300 .id = BOND_OPT_ARP_INTERVAL, 301 .name = "arp_interval", 302 .desc = "arp interval in milliseconds", 303 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 304 BIT(BOND_MODE_ALB), 305 .values = bond_intmax_tbl, 306 .set = bond_option_arp_interval_set 307 }, 308 [BOND_OPT_MISSED_MAX] = { 309 .id = BOND_OPT_MISSED_MAX, 310 .name = "arp_missed_max", 311 .desc = "Maximum number of missed ARP interval", 312 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 313 BIT(BOND_MODE_ALB), 314 .values = bond_missed_max_tbl, 315 .set = bond_option_missed_max_set 316 }, 317 [BOND_OPT_ARP_TARGETS] = { 318 .id = BOND_OPT_ARP_TARGETS, 319 .name = "arp_ip_target", 320 .desc = "arp targets in n.n.n.n form", 321 .flags = BOND_OPTFLAG_RAWVAL, 322 .set = bond_option_arp_ip_targets_set 323 }, 324 [BOND_OPT_NS_TARGETS] = { 325 .id = BOND_OPT_NS_TARGETS, 326 .name = "ns_ip6_target", 327 .desc = "NS targets in ffff:ffff::ffff:ffff form", 328 .flags = BOND_OPTFLAG_RAWVAL, 329 .set = bond_option_ns_ip6_targets_set 330 }, 331 [BOND_OPT_DOWNDELAY] = { 332 .id = BOND_OPT_DOWNDELAY, 333 .name = "downdelay", 334 .desc = "Delay before considering link down, in milliseconds", 335 .values = bond_intmax_tbl, 336 .set = bond_option_downdelay_set 337 }, 338 [BOND_OPT_UPDELAY] = { 339 .id = BOND_OPT_UPDELAY, 340 .name = "updelay", 341 .desc = "Delay before considering link up, in milliseconds", 342 .values = bond_intmax_tbl, 343 .set = bond_option_updelay_set 344 }, 345 [BOND_OPT_LACP_ACTIVE] = { 346 .id = BOND_OPT_LACP_ACTIVE, 347 .name = "lacp_active", 348 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to", 349 .flags = BOND_OPTFLAG_IFDOWN, 350 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 351 .values = bond_lacp_active, 352 .set = bond_option_lacp_active_set 353 }, 354 [BOND_OPT_LACP_RATE] = { 355 .id = BOND_OPT_LACP_RATE, 356 .name = "lacp_rate", 357 .desc = "LACPDU tx rate to request from 802.3ad partner", 358 .flags = BOND_OPTFLAG_IFDOWN, 359 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 360 .values = bond_lacp_rate_tbl, 361 .set = bond_option_lacp_rate_set 362 }, 363 [BOND_OPT_MINLINKS] = { 364 .id = BOND_OPT_MINLINKS, 365 .name = "min_links", 366 .desc = "Minimum number of available links before turning on carrier", 367 .values = bond_intmax_tbl, 368 .set = bond_option_min_links_set 369 }, 370 [BOND_OPT_AD_SELECT] = { 371 .id = BOND_OPT_AD_SELECT, 372 .name = "ad_select", 373 .desc = "803.ad aggregation selection logic", 374 .flags = BOND_OPTFLAG_IFDOWN, 375 .values = bond_ad_select_tbl, 376 .set = bond_option_ad_select_set 377 }, 378 [BOND_OPT_NUM_PEER_NOTIF] = { 379 .id = BOND_OPT_NUM_PEER_NOTIF, 380 .name = "num_unsol_na", 381 .desc = "Number of peer notifications to send on failover event", 382 .values = bond_num_peer_notif_tbl, 383 .set = bond_option_num_peer_notif_set 384 }, 385 [BOND_OPT_MIIMON] = { 386 .id = BOND_OPT_MIIMON, 387 .name = "miimon", 388 .desc = "Link check interval in milliseconds", 389 .values = bond_intmax_tbl, 390 .set = bond_option_miimon_set 391 }, 392 [BOND_OPT_PRIO] = { 393 .id = BOND_OPT_PRIO, 394 .name = "prio", 395 .desc = "Link priority for failover re-selection", 396 .flags = BOND_OPTFLAG_RAWVAL, 397 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 398 BIT(BOND_MODE_TLB) | 399 BIT(BOND_MODE_ALB)), 400 .set = bond_option_prio_set 401 }, 402 [BOND_OPT_PRIMARY] = { 403 .id = BOND_OPT_PRIMARY, 404 .name = "primary", 405 .desc = "Primary network device to use", 406 .flags = BOND_OPTFLAG_RAWVAL, 407 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 408 BIT(BOND_MODE_TLB) | 409 BIT(BOND_MODE_ALB)), 410 .set = bond_option_primary_set 411 }, 412 [BOND_OPT_PRIMARY_RESELECT] = { 413 .id = BOND_OPT_PRIMARY_RESELECT, 414 .name = "primary_reselect", 415 .desc = "Reselect primary slave once it comes up", 416 .values = bond_primary_reselect_tbl, 417 .set = bond_option_primary_reselect_set 418 }, 419 [BOND_OPT_USE_CARRIER] = { 420 .id = BOND_OPT_USE_CARRIER, 421 .name = "use_carrier", 422 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon", 423 .values = bond_use_carrier_tbl, 424 .set = bond_option_use_carrier_set 425 }, 426 [BOND_OPT_ACTIVE_SLAVE] = { 427 .id = BOND_OPT_ACTIVE_SLAVE, 428 .name = "active_slave", 429 .desc = "Currently active slave", 430 .flags = BOND_OPTFLAG_RAWVAL, 431 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 432 BIT(BOND_MODE_TLB) | 433 BIT(BOND_MODE_ALB)), 434 .set = bond_option_active_slave_set 435 }, 436 [BOND_OPT_QUEUE_ID] = { 437 .id = BOND_OPT_QUEUE_ID, 438 .name = "queue_id", 439 .desc = "Set queue id of a slave", 440 .flags = BOND_OPTFLAG_RAWVAL, 441 .set = bond_option_queue_id_set 442 }, 443 [BOND_OPT_ALL_SLAVES_ACTIVE] = { 444 .id = BOND_OPT_ALL_SLAVES_ACTIVE, 445 .name = "all_slaves_active", 446 .desc = "Keep all frames received on an interface by setting active flag for all slaves", 447 .values = bond_all_slaves_active_tbl, 448 .set = bond_option_all_slaves_active_set 449 }, 450 [BOND_OPT_RESEND_IGMP] = { 451 .id = BOND_OPT_RESEND_IGMP, 452 .name = "resend_igmp", 453 .desc = "Number of IGMP membership reports to send on link failure", 454 .values = bond_resend_igmp_tbl, 455 .set = bond_option_resend_igmp_set 456 }, 457 [BOND_OPT_LP_INTERVAL] = { 458 .id = BOND_OPT_LP_INTERVAL, 459 .name = "lp_interval", 460 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch", 461 .values = bond_lp_interval_tbl, 462 .set = bond_option_lp_interval_set 463 }, 464 [BOND_OPT_SLAVES] = { 465 .id = BOND_OPT_SLAVES, 466 .name = "slaves", 467 .desc = "Slave membership management", 468 .flags = BOND_OPTFLAG_RAWVAL, 469 .set = bond_option_slaves_set 470 }, 471 [BOND_OPT_TLB_DYNAMIC_LB] = { 472 .id = BOND_OPT_TLB_DYNAMIC_LB, 473 .name = "tlb_dynamic_lb", 474 .desc = "Enable dynamic flow shuffling", 475 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)), 476 .values = bond_tlb_dynamic_lb_tbl, 477 .flags = BOND_OPTFLAG_IFDOWN, 478 .set = bond_option_tlb_dynamic_lb_set, 479 }, 480 [BOND_OPT_AD_ACTOR_SYS_PRIO] = { 481 .id = BOND_OPT_AD_ACTOR_SYS_PRIO, 482 .name = "ad_actor_sys_prio", 483 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 484 .values = bond_ad_actor_sys_prio_tbl, 485 .set = bond_option_ad_actor_sys_prio_set, 486 }, 487 [BOND_OPT_AD_ACTOR_SYSTEM] = { 488 .id = BOND_OPT_AD_ACTOR_SYSTEM, 489 .name = "ad_actor_system", 490 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 491 .flags = BOND_OPTFLAG_RAWVAL, 492 .set = bond_option_ad_actor_system_set, 493 }, 494 [BOND_OPT_AD_USER_PORT_KEY] = { 495 .id = BOND_OPT_AD_USER_PORT_KEY, 496 .name = "ad_user_port_key", 497 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 498 .flags = BOND_OPTFLAG_IFDOWN, 499 .values = bond_ad_user_port_key_tbl, 500 .set = bond_option_ad_user_port_key_set, 501 }, 502 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = { 503 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS, 504 .name = "num_grat_arp", 505 .desc = "Number of peer notifications to send on failover event", 506 .values = bond_num_peer_notif_tbl, 507 .set = bond_option_num_peer_notif_set 508 }, 509 [BOND_OPT_PEER_NOTIF_DELAY] = { 510 .id = BOND_OPT_PEER_NOTIF_DELAY, 511 .name = "peer_notif_delay", 512 .desc = "Delay between each peer notification on failover event, in milliseconds", 513 .values = bond_peer_notif_delay_tbl, 514 .set = bond_option_peer_notif_delay_set 515 }, 516 [BOND_OPT_COUPLED_CONTROL] = { 517 .id = BOND_OPT_COUPLED_CONTROL, 518 .name = "coupled_control", 519 .desc = "Opt into using coupled control MUX for LACP states", 520 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 521 .flags = BOND_OPTFLAG_IFDOWN, 522 .values = bond_coupled_control_tbl, 523 .set = bond_option_coupled_control_set, 524 }, 525 [BOND_OPT_BROADCAST_NEIGH] = { 526 .id = BOND_OPT_BROADCAST_NEIGH, 527 .name = "broadcast_neighbor", 528 .desc = "Broadcast neighbor packets to all active slaves", 529 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 530 .values = bond_broadcast_neigh_tbl, 531 .set = bond_option_broadcast_neigh_set, 532 } 533 }; 534 535 /* Searches for an option by name */ 536 const struct bond_option *bond_opt_get_by_name(const char *name) 537 { 538 const struct bond_option *opt; 539 int option; 540 541 for (option = 0; option < BOND_OPT_LAST; option++) { 542 opt = bond_opt_get(option); 543 if (opt && !strcmp(opt->name, name)) 544 return opt; 545 } 546 547 return NULL; 548 } 549 550 /* Searches for a value in opt's values[] table */ 551 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val) 552 { 553 const struct bond_option *opt; 554 int i; 555 556 opt = bond_opt_get(option); 557 if (WARN_ON(!opt)) 558 return NULL; 559 for (i = 0; opt->values && opt->values[i].string; i++) 560 if (opt->values[i].value == val) 561 return &opt->values[i]; 562 563 return NULL; 564 } 565 566 /* Searches for a value in opt's values[] table which matches the flagmask */ 567 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt, 568 u32 flagmask) 569 { 570 int i; 571 572 for (i = 0; opt->values && opt->values[i].string; i++) 573 if (opt->values[i].flags & flagmask) 574 return &opt->values[i]; 575 576 return NULL; 577 } 578 579 /* If maxval is missing then there's no range to check. In case minval is 580 * missing then it's considered to be 0. 581 */ 582 static bool bond_opt_check_range(const struct bond_option *opt, u64 val) 583 { 584 const struct bond_opt_value *minval, *maxval; 585 586 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 587 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 588 if (!maxval || (minval && val < minval->value) || val > maxval->value) 589 return false; 590 591 return true; 592 } 593 594 /** 595 * bond_opt_parse - parse option value 596 * @opt: the option to parse against 597 * @val: value to parse 598 * 599 * This function tries to extract the value from @val and check if it's 600 * a possible match for the option and returns NULL if a match isn't found, 601 * or the struct_opt_value that matched. It also strips the new line from 602 * @val->string if it's present. 603 */ 604 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, 605 struct bond_opt_value *val) 606 { 607 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, }; 608 const struct bond_opt_value *tbl; 609 const struct bond_opt_value *ret = NULL; 610 bool checkval; 611 int i, rv; 612 613 /* No parsing if the option wants a raw val */ 614 if (opt->flags & BOND_OPTFLAG_RAWVAL) 615 return val; 616 617 tbl = opt->values; 618 if (!tbl) 619 goto out; 620 621 /* ULLONG_MAX is used to bypass string processing */ 622 checkval = val->value != ULLONG_MAX; 623 if (!checkval) { 624 if (!val->string) 625 goto out; 626 p = strchr(val->string, '\n'); 627 if (p) 628 *p = '\0'; 629 for (p = val->string; *p; p++) 630 if (!(isdigit(*p) || isspace(*p))) 631 break; 632 /* The following code extracts the string to match or the value 633 * and sets checkval appropriately 634 */ 635 if (*p) { 636 rv = sscanf(val->string, "%32s", valstr); 637 } else { 638 rv = sscanf(val->string, "%llu", &val->value); 639 checkval = true; 640 } 641 if (!rv) 642 goto out; 643 } 644 645 for (i = 0; tbl[i].string; i++) { 646 /* Check for exact match */ 647 if (checkval) { 648 if (val->value == tbl[i].value) 649 ret = &tbl[i]; 650 } else { 651 if (!strcmp(valstr, "default") && 652 (tbl[i].flags & BOND_VALFLAG_DEFAULT)) 653 ret = &tbl[i]; 654 655 if (!strcmp(valstr, tbl[i].string)) 656 ret = &tbl[i]; 657 } 658 /* Found an exact match */ 659 if (ret) 660 goto out; 661 } 662 /* Possible range match */ 663 if (checkval && bond_opt_check_range(opt, val->value)) 664 ret = val; 665 out: 666 return ret; 667 } 668 669 /* Check opt's dependencies against bond mode and currently set options */ 670 static int bond_opt_check_deps(struct bonding *bond, 671 const struct bond_option *opt) 672 { 673 struct bond_params *params = &bond->params; 674 675 if (test_bit(params->mode, &opt->unsuppmodes)) 676 return -EACCES; 677 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond)) 678 return -ENOTEMPTY; 679 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) 680 return -EBUSY; 681 682 return 0; 683 } 684 685 static void bond_opt_dep_print(struct bonding *bond, 686 const struct bond_option *opt, 687 struct nlattr *bad_attr, 688 struct netlink_ext_ack *extack) 689 { 690 const struct bond_opt_value *modeval; 691 struct bond_params *params; 692 693 params = &bond->params; 694 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); 695 if (test_bit(params->mode, &opt->unsuppmodes)) { 696 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n", 697 opt->name, modeval->string, modeval->value); 698 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 699 "option not supported in mode"); 700 } 701 } 702 703 static void bond_opt_error_interpret(struct bonding *bond, 704 const struct bond_option *opt, 705 int error, const struct bond_opt_value *val, 706 struct nlattr *bad_attr, 707 struct netlink_ext_ack *extack) 708 { 709 const struct bond_opt_value *minval, *maxval; 710 char *p; 711 712 switch (error) { 713 case -EINVAL: 714 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value"); 715 if (val) { 716 if (val->string) { 717 /* sometimes RAWVAL opts may have new lines */ 718 p = strchr(val->string, '\n'); 719 if (p) 720 *p = '\0'; 721 netdev_err(bond->dev, "option %s: invalid value (%s)\n", 722 opt->name, val->string); 723 } else { 724 netdev_err(bond->dev, "option %s: invalid value (%llu)\n", 725 opt->name, val->value); 726 } 727 } 728 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 729 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 730 if (!maxval) 731 break; 732 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n", 733 opt->name, minval ? minval->value : 0, maxval->value); 734 break; 735 case -EACCES: 736 bond_opt_dep_print(bond, opt, bad_attr, extack); 737 break; 738 case -ENOTEMPTY: 739 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 740 "unable to set option because the bond device has slaves"); 741 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n", 742 opt->name); 743 break; 744 case -EBUSY: 745 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 746 "unable to set option because the bond is up"); 747 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n", 748 opt->name); 749 break; 750 case -ENODEV: 751 if (val && val->string) { 752 p = strchr(val->string, '\n'); 753 if (p) 754 *p = '\0'; 755 netdev_err(bond->dev, "option %s: interface %s does not exist!\n", 756 opt->name, val->string); 757 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 758 "interface does not exist"); 759 } 760 break; 761 default: 762 break; 763 } 764 } 765 766 /** 767 * __bond_opt_set - set a bonding option 768 * @bond: target bond device 769 * @option: option to set 770 * @val: value to set it to 771 * @bad_attr: netlink attribue that caused the error 772 * @extack: extended netlink error structure, used when an error message 773 * needs to be returned to the caller via netlink 774 * 775 * This function is used to change the bond's option value, it can be 776 * used for both enabling/changing an option and for disabling it. RTNL lock 777 * must be obtained before calling this function. 778 */ 779 int __bond_opt_set(struct bonding *bond, 780 unsigned int option, struct bond_opt_value *val, 781 struct nlattr *bad_attr, struct netlink_ext_ack *extack) 782 { 783 const struct bond_opt_value *retval = NULL; 784 const struct bond_option *opt; 785 int ret = -ENOENT; 786 787 ASSERT_RTNL(); 788 789 opt = bond_opt_get(option); 790 if (WARN_ON(!val) || WARN_ON(!opt)) 791 goto out; 792 ret = bond_opt_check_deps(bond, opt); 793 if (ret) 794 goto out; 795 retval = bond_opt_parse(opt, val); 796 if (!retval) { 797 ret = -EINVAL; 798 goto out; 799 } 800 ret = opt->set(bond, retval); 801 out: 802 if (ret) 803 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack); 804 805 return ret; 806 } 807 /** 808 * __bond_opt_set_notify - set a bonding option 809 * @bond: target bond device 810 * @option: option to set 811 * @val: value to set it to 812 * 813 * This function is used to change the bond's option value and trigger 814 * a notification to user sapce. It can be used for both enabling/changing 815 * an option and for disabling it. RTNL lock must be obtained before calling 816 * this function. 817 */ 818 int __bond_opt_set_notify(struct bonding *bond, 819 unsigned int option, struct bond_opt_value *val) 820 { 821 int ret; 822 823 ASSERT_RTNL(); 824 825 ret = __bond_opt_set(bond, option, val, NULL, NULL); 826 827 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED)) 828 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev); 829 830 return ret; 831 } 832 833 /** 834 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set 835 * @bond: target bond device 836 * @option: option to set 837 * @buf: value to set it to 838 * 839 * This function tries to acquire RTNL without blocking and if successful 840 * calls __bond_opt_set. It is mainly used for sysfs option manipulation. 841 */ 842 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) 843 { 844 struct bond_opt_value optval; 845 int ret; 846 847 if (!rtnl_trylock()) 848 return restart_syscall(); 849 bond_opt_initstr(&optval, buf); 850 ret = __bond_opt_set_notify(bond, option, &optval); 851 rtnl_unlock(); 852 853 return ret; 854 } 855 856 /** 857 * bond_opt_get - get a pointer to an option 858 * @option: option for which to return a pointer 859 * 860 * This function checks if option is valid and if so returns a pointer 861 * to its entry in the bond_opts[] option array. 862 */ 863 const struct bond_option *bond_opt_get(unsigned int option) 864 { 865 if (!BOND_OPT_VALID(option)) 866 return NULL; 867 868 return &bond_opts[option]; 869 } 870 871 static bool bond_set_xfrm_features(struct bonding *bond) 872 { 873 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD)) 874 return false; 875 876 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) 877 bond->dev->wanted_features |= BOND_XFRM_FEATURES; 878 else 879 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES; 880 881 return true; 882 } 883 884 static int bond_option_mode_set(struct bonding *bond, 885 const struct bond_opt_value *newval) 886 { 887 if (bond->xdp_prog && !bond_xdp_check(bond, newval->value)) 888 return -EOPNOTSUPP; 889 890 if (!bond_mode_uses_arp(newval->value)) { 891 if (bond->params.arp_interval) { 892 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", 893 newval->string); 894 /* disable arp monitoring */ 895 bond->params.arp_interval = 0; 896 } 897 898 if (!bond->params.miimon) { 899 /* set miimon to default value */ 900 bond->params.miimon = BOND_DEFAULT_MIIMON; 901 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", 902 bond->params.miimon); 903 } 904 } 905 906 if (newval->value == BOND_MODE_ALB) 907 bond->params.tlb_dynamic_lb = 1; 908 909 /* don't cache arp_validate between modes */ 910 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 911 bond->params.mode = newval->value; 912 913 /* When changing mode, the bond device is down, we may reduce 914 * the bond_bcast_neigh_enabled in bond_close() if broadcast_neighbor 915 * enabled in 8023ad mode. Therefore, only clear broadcast_neighbor 916 * to 0. 917 */ 918 bond->params.broadcast_neighbor = 0; 919 920 if (bond->dev->reg_state == NETREG_REGISTERED) { 921 bool update = false; 922 923 update |= bond_set_xfrm_features(bond); 924 925 if (update) 926 netdev_update_features(bond->dev); 927 } 928 929 bond_xdp_set_features(bond->dev); 930 931 return 0; 932 } 933 934 static int bond_option_active_slave_set(struct bonding *bond, 935 const struct bond_opt_value *newval) 936 { 937 char ifname[IFNAMSIZ] = { 0, }; 938 struct net_device *slave_dev; 939 int ret = 0; 940 941 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ 942 if (!strlen(ifname) || newval->string[0] == '\n') { 943 slave_dev = NULL; 944 } else { 945 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); 946 if (!slave_dev) 947 return -ENODEV; 948 } 949 950 if (slave_dev) { 951 if (!netif_is_bond_slave(slave_dev)) { 952 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n"); 953 return -EINVAL; 954 } 955 956 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { 957 slave_err(bond->dev, slave_dev, "Device is not our slave\n"); 958 return -EINVAL; 959 } 960 } 961 962 block_netpoll_tx(); 963 /* check to see if we are clearing active */ 964 if (!slave_dev) { 965 netdev_dbg(bond->dev, "Clearing current active slave\n"); 966 bond_change_active_slave(bond, NULL); 967 bond_select_active_slave(bond); 968 } else { 969 struct slave *old_active = rtnl_dereference(bond->curr_active_slave); 970 struct slave *new_active = bond_slave_get_rtnl(slave_dev); 971 972 BUG_ON(!new_active); 973 974 if (new_active == old_active) { 975 /* do nothing */ 976 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n"); 977 } else { 978 if (old_active && (new_active->link == BOND_LINK_UP) && 979 bond_slave_is_up(new_active)) { 980 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n"); 981 bond_change_active_slave(bond, new_active); 982 } else { 983 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n", 984 new_active->dev->name); 985 ret = -EINVAL; 986 } 987 } 988 } 989 unblock_netpoll_tx(); 990 991 return ret; 992 } 993 994 /* There are two tricky bits here. First, if MII monitoring is activated, then 995 * we must disable ARP monitoring. Second, if the timer isn't running, we must 996 * start it. 997 */ 998 static int bond_option_miimon_set(struct bonding *bond, 999 const struct bond_opt_value *newval) 1000 { 1001 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n", 1002 newval->value); 1003 bond->params.miimon = newval->value; 1004 if (bond->params.updelay) 1005 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", 1006 bond->params.updelay * bond->params.miimon); 1007 if (bond->params.downdelay) 1008 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", 1009 bond->params.downdelay * bond->params.miimon); 1010 if (bond->params.peer_notif_delay) 1011 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n", 1012 bond->params.peer_notif_delay * bond->params.miimon); 1013 if (newval->value && bond->params.arp_interval) { 1014 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n"); 1015 bond->params.arp_interval = 0; 1016 if (bond->params.arp_validate) 1017 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 1018 } 1019 if (bond->dev->flags & IFF_UP) { 1020 /* If the interface is up, we may need to fire off 1021 * the MII timer. If the interface is down, the 1022 * timer will get fired off when the open function 1023 * is called. 1024 */ 1025 if (!newval->value) { 1026 cancel_delayed_work_sync(&bond->mii_work); 1027 } else { 1028 cancel_delayed_work_sync(&bond->arp_work); 1029 queue_delayed_work(bond->wq, &bond->mii_work, 0); 1030 } 1031 } 1032 1033 return 0; 1034 } 1035 1036 /* Set up, down and peer notification delays. These must be multiples 1037 * of the MII monitoring value, and are stored internally as the 1038 * multiplier. Thus, we must translate to MS for the real world. 1039 */ 1040 static int _bond_option_delay_set(struct bonding *bond, 1041 const struct bond_opt_value *newval, 1042 const char *name, 1043 int *target) 1044 { 1045 int value = newval->value; 1046 1047 if (!bond->params.miimon) { 1048 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n", 1049 name); 1050 return -EPERM; 1051 } 1052 if ((value % bond->params.miimon) != 0) { 1053 netdev_warn(bond->dev, 1054 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n", 1055 name, 1056 value, bond->params.miimon, 1057 (value / bond->params.miimon) * 1058 bond->params.miimon); 1059 } 1060 *target = value / bond->params.miimon; 1061 netdev_dbg(bond->dev, "Setting %s to %d\n", 1062 name, 1063 *target * bond->params.miimon); 1064 1065 return 0; 1066 } 1067 1068 static int bond_option_updelay_set(struct bonding *bond, 1069 const struct bond_opt_value *newval) 1070 { 1071 return _bond_option_delay_set(bond, newval, "up delay", 1072 &bond->params.updelay); 1073 } 1074 1075 static int bond_option_downdelay_set(struct bonding *bond, 1076 const struct bond_opt_value *newval) 1077 { 1078 return _bond_option_delay_set(bond, newval, "down delay", 1079 &bond->params.downdelay); 1080 } 1081 1082 static int bond_option_peer_notif_delay_set(struct bonding *bond, 1083 const struct bond_opt_value *newval) 1084 { 1085 int ret = _bond_option_delay_set(bond, newval, 1086 "peer notification delay", 1087 &bond->params.peer_notif_delay); 1088 return ret; 1089 } 1090 1091 static int bond_option_use_carrier_set(struct bonding *bond, 1092 const struct bond_opt_value *newval) 1093 { 1094 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n", 1095 newval->value); 1096 bond->params.use_carrier = newval->value; 1097 1098 return 0; 1099 } 1100 1101 /* There are two tricky bits here. First, if ARP monitoring is activated, then 1102 * we must disable MII monitoring. Second, if the ARP timer isn't running, 1103 * we must start it. 1104 */ 1105 static int bond_option_arp_interval_set(struct bonding *bond, 1106 const struct bond_opt_value *newval) 1107 { 1108 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n", 1109 newval->value); 1110 bond->params.arp_interval = newval->value; 1111 if (newval->value) { 1112 if (bond->params.miimon) { 1113 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n"); 1114 bond->params.miimon = 0; 1115 } 1116 if (!bond->params.arp_targets[0]) 1117 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n"); 1118 } 1119 if (bond->dev->flags & IFF_UP) { 1120 /* If the interface is up, we may need to fire off 1121 * the ARP timer. If the interface is down, the 1122 * timer will get fired off when the open function 1123 * is called. 1124 */ 1125 if (!newval->value) { 1126 if (bond->params.arp_validate) 1127 bond->recv_probe = NULL; 1128 cancel_delayed_work_sync(&bond->arp_work); 1129 } else { 1130 /* arp_validate can be set only in active-backup mode */ 1131 bond->recv_probe = bond_rcv_validate; 1132 cancel_delayed_work_sync(&bond->mii_work); 1133 queue_delayed_work(bond->wq, &bond->arp_work, 0); 1134 } 1135 } 1136 1137 return 0; 1138 } 1139 1140 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, 1141 __be32 target, 1142 unsigned long last_rx) 1143 { 1144 __be32 *targets = bond->params.arp_targets; 1145 struct list_head *iter; 1146 struct slave *slave; 1147 1148 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { 1149 bond_for_each_slave(bond, slave, iter) 1150 slave->target_last_arp_rx[slot] = last_rx; 1151 targets[slot] = target; 1152 } 1153 } 1154 1155 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1156 { 1157 __be32 *targets = bond->params.arp_targets; 1158 int ind; 1159 1160 if (!bond_is_ip_target_ok(target)) { 1161 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n", 1162 &target); 1163 return -EINVAL; 1164 } 1165 1166 if (bond_get_targets_ip(targets, target) != -1) { /* dup */ 1167 netdev_err(bond->dev, "ARP target %pI4 is already present\n", 1168 &target); 1169 return -EINVAL; 1170 } 1171 1172 ind = bond_get_targets_ip(targets, 0); /* first free slot */ 1173 if (ind == -1) { 1174 netdev_err(bond->dev, "ARP target table is full!\n"); 1175 return -EINVAL; 1176 } 1177 1178 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target); 1179 1180 _bond_options_arp_ip_target_set(bond, ind, target, jiffies); 1181 1182 return 0; 1183 } 1184 1185 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1186 { 1187 return _bond_option_arp_ip_target_add(bond, target); 1188 } 1189 1190 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) 1191 { 1192 __be32 *targets = bond->params.arp_targets; 1193 struct list_head *iter; 1194 struct slave *slave; 1195 unsigned long *targets_rx; 1196 int ind, i; 1197 1198 if (!bond_is_ip_target_ok(target)) { 1199 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n", 1200 &target); 1201 return -EINVAL; 1202 } 1203 1204 ind = bond_get_targets_ip(targets, target); 1205 if (ind == -1) { 1206 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n", 1207 &target); 1208 return -EINVAL; 1209 } 1210 1211 if (ind == 0 && !targets[1] && bond->params.arp_interval) 1212 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); 1213 1214 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target); 1215 1216 bond_for_each_slave(bond, slave, iter) { 1217 targets_rx = slave->target_last_arp_rx; 1218 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1219 targets_rx[i] = targets_rx[i+1]; 1220 targets_rx[i] = 0; 1221 } 1222 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1223 targets[i] = targets[i+1]; 1224 targets[i] = 0; 1225 1226 return 0; 1227 } 1228 1229 void bond_option_arp_ip_targets_clear(struct bonding *bond) 1230 { 1231 int i; 1232 1233 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 1234 _bond_options_arp_ip_target_set(bond, i, 0, 0); 1235 } 1236 1237 static int bond_option_arp_ip_targets_set(struct bonding *bond, 1238 const struct bond_opt_value *newval) 1239 { 1240 int ret = -EPERM; 1241 __be32 target; 1242 1243 if (newval->string) { 1244 if (strlen(newval->string) < 1 || 1245 !in4_pton(newval->string + 1, -1, (u8 *)&target, -1, NULL)) { 1246 netdev_err(bond->dev, "invalid ARP target specified\n"); 1247 return ret; 1248 } 1249 if (newval->string[0] == '+') 1250 ret = bond_option_arp_ip_target_add(bond, target); 1251 else if (newval->string[0] == '-') 1252 ret = bond_option_arp_ip_target_rem(bond, target); 1253 else 1254 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n"); 1255 } else { 1256 target = newval->value; 1257 ret = bond_option_arp_ip_target_add(bond, target); 1258 } 1259 1260 return ret; 1261 } 1262 1263 #if IS_ENABLED(CONFIG_IPV6) 1264 static bool slave_can_set_ns_maddr(const struct bonding *bond, struct slave *slave) 1265 { 1266 return BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP && 1267 !bond_is_active_slave(slave) && 1268 slave->dev->flags & IFF_MULTICAST; 1269 } 1270 1271 /** 1272 * slave_set_ns_maddrs - add/del all NS mac addresses for slave 1273 * @bond: bond device 1274 * @slave: slave device 1275 * @add: add or remove all the NS mac addresses 1276 * 1277 * This function tries to add or delete all the NS mac addresses on the slave 1278 * 1279 * Note, the IPv6 NS target address is the unicast address in Neighbor 1280 * Solicitation (NS) message. The dest address of NS message should be 1281 * solicited-node multicast address of the target. The dest mac of NS message 1282 * is converted from the solicited-node multicast address. 1283 * 1284 * This function is called when 1285 * * arp_validate changes 1286 * * enslaving, releasing new slaves 1287 */ 1288 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) 1289 { 1290 struct in6_addr *targets = bond->params.ns_targets; 1291 char slot_maddr[MAX_ADDR_LEN]; 1292 struct in6_addr mcaddr; 1293 int i; 1294 1295 if (!slave_can_set_ns_maddr(bond, slave)) 1296 return; 1297 1298 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) { 1299 if (ipv6_addr_any(&targets[i])) 1300 break; 1301 1302 addrconf_addr_solict_mult(&targets[i], &mcaddr); 1303 if (!ndisc_mc_map(&mcaddr, slot_maddr, slave->dev, 0)) { 1304 if (add) 1305 dev_mc_add(slave->dev, slot_maddr); 1306 else 1307 dev_mc_del(slave->dev, slot_maddr); 1308 } 1309 } 1310 } 1311 1312 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) 1313 { 1314 if (!bond->params.arp_validate) 1315 return; 1316 slave_set_ns_maddrs(bond, slave, true); 1317 } 1318 1319 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) 1320 { 1321 if (!bond->params.arp_validate) 1322 return; 1323 slave_set_ns_maddrs(bond, slave, false); 1324 } 1325 1326 /** 1327 * slave_set_ns_maddr - set new NS mac address for slave 1328 * @bond: bond device 1329 * @slave: slave device 1330 * @target: the new IPv6 target 1331 * @slot: the old IPv6 target in the slot 1332 * 1333 * This function tries to replace the old mac address to new one on the slave. 1334 * 1335 * Note, the target/slot IPv6 address is the unicast address in Neighbor 1336 * Solicitation (NS) message. The dest address of NS message should be 1337 * solicited-node multicast address of the target. The dest mac of NS message 1338 * is converted from the solicited-node multicast address. 1339 * 1340 * This function is called when 1341 * * An IPv6 NS target is added or removed. 1342 */ 1343 static void slave_set_ns_maddr(struct bonding *bond, struct slave *slave, 1344 struct in6_addr *target, struct in6_addr *slot) 1345 { 1346 char mac_addr[MAX_ADDR_LEN]; 1347 struct in6_addr mcast_addr; 1348 1349 if (!bond->params.arp_validate || !slave_can_set_ns_maddr(bond, slave)) 1350 return; 1351 1352 /* remove the previous mac addr from slave */ 1353 addrconf_addr_solict_mult(slot, &mcast_addr); 1354 if (!ipv6_addr_any(slot) && 1355 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0)) 1356 dev_mc_del(slave->dev, mac_addr); 1357 1358 /* add new mac addr on slave if target is set */ 1359 addrconf_addr_solict_mult(target, &mcast_addr); 1360 if (!ipv6_addr_any(target) && 1361 !ndisc_mc_map(&mcast_addr, mac_addr, slave->dev, 0)) 1362 dev_mc_add(slave->dev, mac_addr); 1363 } 1364 1365 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot, 1366 struct in6_addr *target, 1367 unsigned long last_rx) 1368 { 1369 struct in6_addr *targets = bond->params.ns_targets; 1370 struct list_head *iter; 1371 struct slave *slave; 1372 1373 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) { 1374 bond_for_each_slave(bond, slave, iter) { 1375 slave->target_last_arp_rx[slot] = last_rx; 1376 slave_set_ns_maddr(bond, slave, target, &targets[slot]); 1377 } 1378 targets[slot] = *target; 1379 } 1380 } 1381 1382 void bond_option_ns_ip6_targets_clear(struct bonding *bond) 1383 { 1384 struct in6_addr addr_any = in6addr_any; 1385 int i; 1386 1387 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) 1388 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0); 1389 } 1390 1391 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1392 const struct bond_opt_value *newval) 1393 { 1394 struct in6_addr *target = (struct in6_addr *)newval->extra; 1395 struct in6_addr *targets = bond->params.ns_targets; 1396 struct in6_addr addr_any = in6addr_any; 1397 int index; 1398 1399 if (!bond_is_ip6_target_ok(target)) { 1400 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n", 1401 target); 1402 return -EINVAL; 1403 } 1404 1405 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */ 1406 netdev_err(bond->dev, "NS target %pI6c is already present\n", 1407 target); 1408 return -EINVAL; 1409 } 1410 1411 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */ 1412 if (index == -1) { 1413 netdev_err(bond->dev, "NS target table is full!\n"); 1414 return -EINVAL; 1415 } 1416 1417 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target); 1418 1419 _bond_options_ns_ip6_target_set(bond, index, target, jiffies); 1420 1421 return 0; 1422 } 1423 #else 1424 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1425 const struct bond_opt_value *newval) 1426 { 1427 return -EPERM; 1428 } 1429 1430 static void slave_set_ns_maddrs(struct bonding *bond, struct slave *slave, bool add) {} 1431 1432 void bond_slave_ns_maddrs_add(struct bonding *bond, struct slave *slave) {} 1433 1434 void bond_slave_ns_maddrs_del(struct bonding *bond, struct slave *slave) {} 1435 #endif 1436 1437 static int bond_option_arp_validate_set(struct bonding *bond, 1438 const struct bond_opt_value *newval) 1439 { 1440 bool changed = !!bond->params.arp_validate != !!newval->value; 1441 struct list_head *iter; 1442 struct slave *slave; 1443 1444 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n", 1445 newval->string, newval->value); 1446 bond->params.arp_validate = newval->value; 1447 1448 if (changed) { 1449 bond_for_each_slave(bond, slave, iter) 1450 slave_set_ns_maddrs(bond, slave, !!bond->params.arp_validate); 1451 } 1452 1453 return 0; 1454 } 1455 1456 static int bond_option_arp_all_targets_set(struct bonding *bond, 1457 const struct bond_opt_value *newval) 1458 { 1459 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n", 1460 newval->string, newval->value); 1461 bond->params.arp_all_targets = newval->value; 1462 1463 return 0; 1464 } 1465 1466 static int bond_option_missed_max_set(struct bonding *bond, 1467 const struct bond_opt_value *newval) 1468 { 1469 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n", 1470 newval->string, newval->value); 1471 bond->params.missed_max = newval->value; 1472 1473 return 0; 1474 } 1475 1476 static int bond_option_prio_set(struct bonding *bond, 1477 const struct bond_opt_value *newval) 1478 { 1479 struct slave *slave; 1480 1481 slave = bond_slave_get_rtnl(newval->slave_dev); 1482 if (!slave) { 1483 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__); 1484 return -ENODEV; 1485 } 1486 slave->prio = newval->value; 1487 1488 if (rtnl_dereference(bond->primary_slave)) 1489 slave_warn(bond->dev, slave->dev, 1490 "prio updated, but will not affect failover re-selection as primary slave have been set\n"); 1491 else 1492 bond_select_active_slave(bond); 1493 1494 return 0; 1495 } 1496 1497 static int bond_option_primary_set(struct bonding *bond, 1498 const struct bond_opt_value *newval) 1499 { 1500 char *p, *primary = newval->string; 1501 struct list_head *iter; 1502 struct slave *slave; 1503 1504 block_netpoll_tx(); 1505 1506 p = strchr(primary, '\n'); 1507 if (p) 1508 *p = '\0'; 1509 /* check to see if we are clearing primary */ 1510 if (!strlen(primary)) { 1511 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1512 RCU_INIT_POINTER(bond->primary_slave, NULL); 1513 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1514 bond_select_active_slave(bond); 1515 goto out; 1516 } 1517 1518 bond_for_each_slave(bond, slave, iter) { 1519 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1520 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); 1521 rcu_assign_pointer(bond->primary_slave, slave); 1522 strcpy(bond->params.primary, slave->dev->name); 1523 bond->force_primary = true; 1524 bond_select_active_slave(bond); 1525 goto out; 1526 } 1527 } 1528 1529 if (rtnl_dereference(bond->primary_slave)) { 1530 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1531 RCU_INIT_POINTER(bond->primary_slave, NULL); 1532 bond_select_active_slave(bond); 1533 } 1534 strscpy_pad(bond->params.primary, primary, IFNAMSIZ); 1535 1536 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", 1537 primary); 1538 1539 out: 1540 unblock_netpoll_tx(); 1541 1542 return 0; 1543 } 1544 1545 static int bond_option_primary_reselect_set(struct bonding *bond, 1546 const struct bond_opt_value *newval) 1547 { 1548 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", 1549 newval->string, newval->value); 1550 bond->params.primary_reselect = newval->value; 1551 1552 block_netpoll_tx(); 1553 bond_select_active_slave(bond); 1554 unblock_netpoll_tx(); 1555 1556 return 0; 1557 } 1558 1559 static int bond_option_fail_over_mac_set(struct bonding *bond, 1560 const struct bond_opt_value *newval) 1561 { 1562 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", 1563 newval->string, newval->value); 1564 bond->params.fail_over_mac = newval->value; 1565 1566 return 0; 1567 } 1568 1569 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1570 const struct bond_opt_value *newval) 1571 { 1572 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", 1573 newval->string, newval->value); 1574 bond->params.xmit_policy = newval->value; 1575 1576 return 0; 1577 } 1578 1579 static int bond_option_resend_igmp_set(struct bonding *bond, 1580 const struct bond_opt_value *newval) 1581 { 1582 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", 1583 newval->value); 1584 bond->params.resend_igmp = newval->value; 1585 1586 return 0; 1587 } 1588 1589 static int bond_option_num_peer_notif_set(struct bonding *bond, 1590 const struct bond_opt_value *newval) 1591 { 1592 bond->params.num_peer_notif = newval->value; 1593 1594 return 0; 1595 } 1596 1597 static int bond_option_all_slaves_active_set(struct bonding *bond, 1598 const struct bond_opt_value *newval) 1599 { 1600 struct list_head *iter; 1601 struct slave *slave; 1602 1603 if (newval->value == bond->params.all_slaves_active) 1604 return 0; 1605 bond->params.all_slaves_active = newval->value; 1606 bond_for_each_slave(bond, slave, iter) { 1607 if (!bond_is_active_slave(slave)) { 1608 if (newval->value) 1609 slave->inactive = 0; 1610 else 1611 slave->inactive = 1; 1612 } 1613 } 1614 1615 return 0; 1616 } 1617 1618 static int bond_option_min_links_set(struct bonding *bond, 1619 const struct bond_opt_value *newval) 1620 { 1621 netdev_dbg(bond->dev, "Setting min links value to %llu\n", 1622 newval->value); 1623 bond->params.min_links = newval->value; 1624 bond_set_carrier(bond); 1625 1626 return 0; 1627 } 1628 1629 static int bond_option_lp_interval_set(struct bonding *bond, 1630 const struct bond_opt_value *newval) 1631 { 1632 bond->params.lp_interval = newval->value; 1633 1634 return 0; 1635 } 1636 1637 static int bond_option_pps_set(struct bonding *bond, 1638 const struct bond_opt_value *newval) 1639 { 1640 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", 1641 newval->value); 1642 bond->params.packets_per_slave = newval->value; 1643 if (newval->value > 0) { 1644 bond->params.reciprocal_packets_per_slave = 1645 reciprocal_value(newval->value); 1646 } else { 1647 /* reciprocal_packets_per_slave is unused if 1648 * packets_per_slave is 0 or 1, just initialize it 1649 */ 1650 bond->params.reciprocal_packets_per_slave = 1651 (struct reciprocal_value) { 0 }; 1652 } 1653 1654 return 0; 1655 } 1656 1657 static int bond_option_lacp_active_set(struct bonding *bond, 1658 const struct bond_opt_value *newval) 1659 { 1660 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n", 1661 newval->string, newval->value); 1662 bond->params.lacp_active = newval->value; 1663 bond_3ad_update_lacp_active(bond); 1664 1665 return 0; 1666 } 1667 1668 static int bond_option_lacp_rate_set(struct bonding *bond, 1669 const struct bond_opt_value *newval) 1670 { 1671 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", 1672 newval->string, newval->value); 1673 bond->params.lacp_fast = newval->value; 1674 bond_3ad_update_lacp_rate(bond); 1675 1676 return 0; 1677 } 1678 1679 static int bond_option_ad_select_set(struct bonding *bond, 1680 const struct bond_opt_value *newval) 1681 { 1682 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", 1683 newval->string, newval->value); 1684 bond->params.ad_select = newval->value; 1685 1686 return 0; 1687 } 1688 1689 static int bond_option_queue_id_set(struct bonding *bond, 1690 const struct bond_opt_value *newval) 1691 { 1692 struct slave *slave, *update_slave; 1693 struct net_device *sdev; 1694 struct list_head *iter; 1695 char *delim; 1696 int ret = 0; 1697 u16 qid; 1698 1699 /* delim will point to queue id if successful */ 1700 delim = strchr(newval->string, ':'); 1701 if (!delim) 1702 goto err_no_cmd; 1703 1704 /* Terminate string that points to device name and bump it 1705 * up one, so we can read the queue id there. 1706 */ 1707 *delim = '\0'; 1708 if (sscanf(++delim, "%hd\n", &qid) != 1) 1709 goto err_no_cmd; 1710 1711 /* Check buffer length, valid ifname and queue id */ 1712 if (!dev_valid_name(newval->string) || 1713 qid > bond->dev->real_num_tx_queues) 1714 goto err_no_cmd; 1715 1716 /* Get the pointer to that interface if it exists */ 1717 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1718 if (!sdev) 1719 goto err_no_cmd; 1720 1721 /* Search for thes slave and check for duplicate qids */ 1722 update_slave = NULL; 1723 bond_for_each_slave(bond, slave, iter) { 1724 if (sdev == slave->dev) 1725 /* We don't need to check the matching 1726 * slave for dups, since we're overwriting it 1727 */ 1728 update_slave = slave; 1729 else if (qid && qid == slave->queue_id) { 1730 goto err_no_cmd; 1731 } 1732 } 1733 1734 if (!update_slave) 1735 goto err_no_cmd; 1736 1737 /* Actually set the qids for the slave */ 1738 WRITE_ONCE(update_slave->queue_id, qid); 1739 1740 out: 1741 return ret; 1742 1743 err_no_cmd: 1744 netdev_dbg(bond->dev, "invalid input for queue_id set\n"); 1745 ret = -EPERM; 1746 goto out; 1747 1748 } 1749 1750 static int bond_option_slaves_set(struct bonding *bond, 1751 const struct bond_opt_value *newval) 1752 { 1753 char command[IFNAMSIZ + 1] = { 0, }; 1754 struct net_device *dev; 1755 char *ifname; 1756 int ret; 1757 1758 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1759 ifname = command + 1; 1760 if ((strlen(command) <= 1) || 1761 (command[0] != '+' && command[0] != '-') || 1762 !dev_valid_name(ifname)) 1763 goto err_no_cmd; 1764 1765 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1766 if (!dev) { 1767 netdev_dbg(bond->dev, "interface %s does not exist!\n", 1768 ifname); 1769 ret = -ENODEV; 1770 goto out; 1771 } 1772 1773 switch (command[0]) { 1774 case '+': 1775 slave_dbg(bond->dev, dev, "Enslaving interface\n"); 1776 ret = bond_enslave(bond->dev, dev, NULL); 1777 break; 1778 1779 case '-': 1780 slave_dbg(bond->dev, dev, "Releasing interface\n"); 1781 ret = bond_release(bond->dev, dev); 1782 break; 1783 1784 default: 1785 /* should not run here. */ 1786 goto err_no_cmd; 1787 } 1788 1789 out: 1790 return ret; 1791 1792 err_no_cmd: 1793 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); 1794 ret = -EPERM; 1795 goto out; 1796 } 1797 1798 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1799 const struct bond_opt_value *newval) 1800 { 1801 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", 1802 newval->string, newval->value); 1803 bond->params.tlb_dynamic_lb = newval->value; 1804 1805 return 0; 1806 } 1807 1808 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 1809 const struct bond_opt_value *newval) 1810 { 1811 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", 1812 newval->value); 1813 1814 bond->params.ad_actor_sys_prio = newval->value; 1815 bond_3ad_update_ad_actor_settings(bond); 1816 1817 return 0; 1818 } 1819 1820 static int bond_option_ad_actor_system_set(struct bonding *bond, 1821 const struct bond_opt_value *newval) 1822 { 1823 u8 macaddr[ETH_ALEN]; 1824 u8 *mac; 1825 1826 if (newval->string) { 1827 if (!mac_pton(newval->string, macaddr)) 1828 goto err; 1829 mac = macaddr; 1830 } else { 1831 mac = (u8 *)&newval->value; 1832 } 1833 1834 if (is_multicast_ether_addr(mac)) 1835 goto err; 1836 1837 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); 1838 ether_addr_copy(bond->params.ad_actor_system, mac); 1839 bond_3ad_update_ad_actor_settings(bond); 1840 1841 return 0; 1842 1843 err: 1844 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); 1845 return -EINVAL; 1846 } 1847 1848 static int bond_option_ad_user_port_key_set(struct bonding *bond, 1849 const struct bond_opt_value *newval) 1850 { 1851 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", 1852 newval->value); 1853 1854 bond->params.ad_user_port_key = newval->value; 1855 return 0; 1856 } 1857 1858 static int bond_option_coupled_control_set(struct bonding *bond, 1859 const struct bond_opt_value *newval) 1860 { 1861 netdev_info(bond->dev, "Setting coupled_control to %s (%llu)\n", 1862 newval->string, newval->value); 1863 1864 bond->params.coupled_control = newval->value; 1865 return 0; 1866 } 1867 1868 static int bond_option_broadcast_neigh_set(struct bonding *bond, 1869 const struct bond_opt_value *newval) 1870 { 1871 if (bond->params.broadcast_neighbor == newval->value) 1872 return 0; 1873 1874 bond->params.broadcast_neighbor = newval->value; 1875 if (bond->dev->flags & IFF_UP) { 1876 if (bond->params.broadcast_neighbor) 1877 static_branch_inc(&bond_bcast_neigh_enabled); 1878 else 1879 static_branch_dec(&bond_bcast_neigh_enabled); 1880 } 1881 1882 netdev_dbg(bond->dev, "Setting broadcast_neighbor to %s (%llu)\n", 1883 newval->string, newval->value); 1884 return 0; 1885 } 1886