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