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