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 int bond_option_mode_set(struct bonding *bond, 846 const struct bond_opt_value *newval) 847 { 848 if (!bond_mode_uses_arp(newval->value)) { 849 if (bond->params.arp_interval) { 850 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", 851 newval->string); 852 /* disable arp monitoring */ 853 bond->params.arp_interval = 0; 854 } 855 856 if (!bond->params.miimon) { 857 /* set miimon to default value */ 858 bond->params.miimon = BOND_DEFAULT_MIIMON; 859 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", 860 bond->params.miimon); 861 } 862 } 863 864 if (newval->value == BOND_MODE_ALB) 865 bond->params.tlb_dynamic_lb = 1; 866 867 /* don't cache arp_validate between modes */ 868 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 869 bond->params.mode = newval->value; 870 871 if (bond->dev->reg_state == NETREG_REGISTERED) { 872 bool update = false; 873 874 update |= bond_set_xfrm_features(bond); 875 876 if (update) 877 netdev_update_features(bond->dev); 878 } 879 880 bond_xdp_set_features(bond->dev); 881 882 return 0; 883 } 884 885 static int bond_option_active_slave_set(struct bonding *bond, 886 const struct bond_opt_value *newval) 887 { 888 char ifname[IFNAMSIZ] = { 0, }; 889 struct net_device *slave_dev; 890 int ret = 0; 891 892 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ 893 if (!strlen(ifname) || newval->string[0] == '\n') { 894 slave_dev = NULL; 895 } else { 896 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); 897 if (!slave_dev) 898 return -ENODEV; 899 } 900 901 if (slave_dev) { 902 if (!netif_is_bond_slave(slave_dev)) { 903 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n"); 904 return -EINVAL; 905 } 906 907 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { 908 slave_err(bond->dev, slave_dev, "Device is not our slave\n"); 909 return -EINVAL; 910 } 911 } 912 913 block_netpoll_tx(); 914 /* check to see if we are clearing active */ 915 if (!slave_dev) { 916 netdev_dbg(bond->dev, "Clearing current active slave\n"); 917 RCU_INIT_POINTER(bond->curr_active_slave, NULL); 918 bond_select_active_slave(bond); 919 } else { 920 struct slave *old_active = rtnl_dereference(bond->curr_active_slave); 921 struct slave *new_active = bond_slave_get_rtnl(slave_dev); 922 923 BUG_ON(!new_active); 924 925 if (new_active == old_active) { 926 /* do nothing */ 927 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n"); 928 } else { 929 if (old_active && (new_active->link == BOND_LINK_UP) && 930 bond_slave_is_up(new_active)) { 931 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n"); 932 bond_change_active_slave(bond, new_active); 933 } else { 934 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n", 935 new_active->dev->name); 936 ret = -EINVAL; 937 } 938 } 939 } 940 unblock_netpoll_tx(); 941 942 return ret; 943 } 944 945 /* There are two tricky bits here. First, if MII monitoring is activated, then 946 * we must disable ARP monitoring. Second, if the timer isn't running, we must 947 * start it. 948 */ 949 static int bond_option_miimon_set(struct bonding *bond, 950 const struct bond_opt_value *newval) 951 { 952 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n", 953 newval->value); 954 bond->params.miimon = newval->value; 955 if (bond->params.updelay) 956 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", 957 bond->params.updelay * bond->params.miimon); 958 if (bond->params.downdelay) 959 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", 960 bond->params.downdelay * bond->params.miimon); 961 if (bond->params.peer_notif_delay) 962 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n", 963 bond->params.peer_notif_delay * bond->params.miimon); 964 if (newval->value && bond->params.arp_interval) { 965 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n"); 966 bond->params.arp_interval = 0; 967 if (bond->params.arp_validate) 968 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 969 } 970 if (bond->dev->flags & IFF_UP) { 971 /* If the interface is up, we may need to fire off 972 * the MII timer. If the interface is down, the 973 * timer will get fired off when the open function 974 * is called. 975 */ 976 if (!newval->value) { 977 cancel_delayed_work_sync(&bond->mii_work); 978 } else { 979 cancel_delayed_work_sync(&bond->arp_work); 980 queue_delayed_work(bond->wq, &bond->mii_work, 0); 981 } 982 } 983 984 return 0; 985 } 986 987 /* Set up, down and peer notification delays. These must be multiples 988 * of the MII monitoring value, and are stored internally as the 989 * multiplier. Thus, we must translate to MS for the real world. 990 */ 991 static int _bond_option_delay_set(struct bonding *bond, 992 const struct bond_opt_value *newval, 993 const char *name, 994 int *target) 995 { 996 int value = newval->value; 997 998 if (!bond->params.miimon) { 999 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n", 1000 name); 1001 return -EPERM; 1002 } 1003 if ((value % bond->params.miimon) != 0) { 1004 netdev_warn(bond->dev, 1005 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n", 1006 name, 1007 value, bond->params.miimon, 1008 (value / bond->params.miimon) * 1009 bond->params.miimon); 1010 } 1011 *target = value / bond->params.miimon; 1012 netdev_dbg(bond->dev, "Setting %s to %d\n", 1013 name, 1014 *target * bond->params.miimon); 1015 1016 return 0; 1017 } 1018 1019 static int bond_option_updelay_set(struct bonding *bond, 1020 const struct bond_opt_value *newval) 1021 { 1022 return _bond_option_delay_set(bond, newval, "up delay", 1023 &bond->params.updelay); 1024 } 1025 1026 static int bond_option_downdelay_set(struct bonding *bond, 1027 const struct bond_opt_value *newval) 1028 { 1029 return _bond_option_delay_set(bond, newval, "down delay", 1030 &bond->params.downdelay); 1031 } 1032 1033 static int bond_option_peer_notif_delay_set(struct bonding *bond, 1034 const struct bond_opt_value *newval) 1035 { 1036 int ret = _bond_option_delay_set(bond, newval, 1037 "peer notification delay", 1038 &bond->params.peer_notif_delay); 1039 return ret; 1040 } 1041 1042 static int bond_option_use_carrier_set(struct bonding *bond, 1043 const struct bond_opt_value *newval) 1044 { 1045 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n", 1046 newval->value); 1047 bond->params.use_carrier = newval->value; 1048 1049 return 0; 1050 } 1051 1052 /* There are two tricky bits here. First, if ARP monitoring is activated, then 1053 * we must disable MII monitoring. Second, if the ARP timer isn't running, 1054 * we must start it. 1055 */ 1056 static int bond_option_arp_interval_set(struct bonding *bond, 1057 const struct bond_opt_value *newval) 1058 { 1059 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n", 1060 newval->value); 1061 bond->params.arp_interval = newval->value; 1062 if (newval->value) { 1063 if (bond->params.miimon) { 1064 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n"); 1065 bond->params.miimon = 0; 1066 } 1067 if (!bond->params.arp_targets[0]) 1068 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n"); 1069 } 1070 if (bond->dev->flags & IFF_UP) { 1071 /* If the interface is up, we may need to fire off 1072 * the ARP timer. If the interface is down, the 1073 * timer will get fired off when the open function 1074 * is called. 1075 */ 1076 if (!newval->value) { 1077 if (bond->params.arp_validate) 1078 bond->recv_probe = NULL; 1079 cancel_delayed_work_sync(&bond->arp_work); 1080 } else { 1081 /* arp_validate can be set only in active-backup mode */ 1082 bond->recv_probe = bond_rcv_validate; 1083 cancel_delayed_work_sync(&bond->mii_work); 1084 queue_delayed_work(bond->wq, &bond->arp_work, 0); 1085 } 1086 } 1087 1088 return 0; 1089 } 1090 1091 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, 1092 __be32 target, 1093 unsigned long last_rx) 1094 { 1095 __be32 *targets = bond->params.arp_targets; 1096 struct list_head *iter; 1097 struct slave *slave; 1098 1099 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { 1100 bond_for_each_slave(bond, slave, iter) 1101 slave->target_last_arp_rx[slot] = last_rx; 1102 targets[slot] = target; 1103 } 1104 } 1105 1106 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1107 { 1108 __be32 *targets = bond->params.arp_targets; 1109 int ind; 1110 1111 if (!bond_is_ip_target_ok(target)) { 1112 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n", 1113 &target); 1114 return -EINVAL; 1115 } 1116 1117 if (bond_get_targets_ip(targets, target) != -1) { /* dup */ 1118 netdev_err(bond->dev, "ARP target %pI4 is already present\n", 1119 &target); 1120 return -EINVAL; 1121 } 1122 1123 ind = bond_get_targets_ip(targets, 0); /* first free slot */ 1124 if (ind == -1) { 1125 netdev_err(bond->dev, "ARP target table is full!\n"); 1126 return -EINVAL; 1127 } 1128 1129 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target); 1130 1131 _bond_options_arp_ip_target_set(bond, ind, target, jiffies); 1132 1133 return 0; 1134 } 1135 1136 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1137 { 1138 return _bond_option_arp_ip_target_add(bond, target); 1139 } 1140 1141 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) 1142 { 1143 __be32 *targets = bond->params.arp_targets; 1144 struct list_head *iter; 1145 struct slave *slave; 1146 unsigned long *targets_rx; 1147 int ind, i; 1148 1149 if (!bond_is_ip_target_ok(target)) { 1150 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n", 1151 &target); 1152 return -EINVAL; 1153 } 1154 1155 ind = bond_get_targets_ip(targets, target); 1156 if (ind == -1) { 1157 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n", 1158 &target); 1159 return -EINVAL; 1160 } 1161 1162 if (ind == 0 && !targets[1] && bond->params.arp_interval) 1163 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); 1164 1165 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target); 1166 1167 bond_for_each_slave(bond, slave, iter) { 1168 targets_rx = slave->target_last_arp_rx; 1169 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1170 targets_rx[i] = targets_rx[i+1]; 1171 targets_rx[i] = 0; 1172 } 1173 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1174 targets[i] = targets[i+1]; 1175 targets[i] = 0; 1176 1177 return 0; 1178 } 1179 1180 void bond_option_arp_ip_targets_clear(struct bonding *bond) 1181 { 1182 int i; 1183 1184 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 1185 _bond_options_arp_ip_target_set(bond, i, 0, 0); 1186 } 1187 1188 static int bond_option_arp_ip_targets_set(struct bonding *bond, 1189 const struct bond_opt_value *newval) 1190 { 1191 int ret = -EPERM; 1192 __be32 target; 1193 1194 if (newval->string) { 1195 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) { 1196 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n", 1197 &target); 1198 return ret; 1199 } 1200 if (newval->string[0] == '+') 1201 ret = bond_option_arp_ip_target_add(bond, target); 1202 else if (newval->string[0] == '-') 1203 ret = bond_option_arp_ip_target_rem(bond, target); 1204 else 1205 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n"); 1206 } else { 1207 target = newval->value; 1208 ret = bond_option_arp_ip_target_add(bond, target); 1209 } 1210 1211 return ret; 1212 } 1213 1214 #if IS_ENABLED(CONFIG_IPV6) 1215 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot, 1216 struct in6_addr *target, 1217 unsigned long last_rx) 1218 { 1219 struct in6_addr *targets = bond->params.ns_targets; 1220 struct list_head *iter; 1221 struct slave *slave; 1222 1223 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) { 1224 bond_for_each_slave(bond, slave, iter) 1225 slave->target_last_arp_rx[slot] = last_rx; 1226 targets[slot] = *target; 1227 } 1228 } 1229 1230 void bond_option_ns_ip6_targets_clear(struct bonding *bond) 1231 { 1232 struct in6_addr addr_any = in6addr_any; 1233 int i; 1234 1235 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) 1236 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0); 1237 } 1238 1239 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1240 const struct bond_opt_value *newval) 1241 { 1242 struct in6_addr *target = (struct in6_addr *)newval->extra; 1243 struct in6_addr *targets = bond->params.ns_targets; 1244 struct in6_addr addr_any = in6addr_any; 1245 int index; 1246 1247 if (!bond_is_ip6_target_ok(target)) { 1248 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n", 1249 target); 1250 return -EINVAL; 1251 } 1252 1253 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */ 1254 netdev_err(bond->dev, "NS target %pI6c is already present\n", 1255 target); 1256 return -EINVAL; 1257 } 1258 1259 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */ 1260 if (index == -1) { 1261 netdev_err(bond->dev, "NS target table is full!\n"); 1262 return -EINVAL; 1263 } 1264 1265 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target); 1266 1267 _bond_options_ns_ip6_target_set(bond, index, target, jiffies); 1268 1269 return 0; 1270 } 1271 #else 1272 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1273 const struct bond_opt_value *newval) 1274 { 1275 return -EPERM; 1276 } 1277 #endif 1278 1279 static int bond_option_arp_validate_set(struct bonding *bond, 1280 const struct bond_opt_value *newval) 1281 { 1282 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n", 1283 newval->string, newval->value); 1284 bond->params.arp_validate = newval->value; 1285 1286 return 0; 1287 } 1288 1289 static int bond_option_arp_all_targets_set(struct bonding *bond, 1290 const struct bond_opt_value *newval) 1291 { 1292 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n", 1293 newval->string, newval->value); 1294 bond->params.arp_all_targets = newval->value; 1295 1296 return 0; 1297 } 1298 1299 static int bond_option_missed_max_set(struct bonding *bond, 1300 const struct bond_opt_value *newval) 1301 { 1302 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n", 1303 newval->string, newval->value); 1304 bond->params.missed_max = newval->value; 1305 1306 return 0; 1307 } 1308 1309 static int bond_option_prio_set(struct bonding *bond, 1310 const struct bond_opt_value *newval) 1311 { 1312 struct slave *slave; 1313 1314 slave = bond_slave_get_rtnl(newval->slave_dev); 1315 if (!slave) { 1316 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__); 1317 return -ENODEV; 1318 } 1319 slave->prio = newval->value; 1320 1321 if (rtnl_dereference(bond->primary_slave)) 1322 slave_warn(bond->dev, slave->dev, 1323 "prio updated, but will not affect failover re-selection as primary slave have been set\n"); 1324 else 1325 bond_select_active_slave(bond); 1326 1327 return 0; 1328 } 1329 1330 static int bond_option_primary_set(struct bonding *bond, 1331 const struct bond_opt_value *newval) 1332 { 1333 char *p, *primary = newval->string; 1334 struct list_head *iter; 1335 struct slave *slave; 1336 1337 block_netpoll_tx(); 1338 1339 p = strchr(primary, '\n'); 1340 if (p) 1341 *p = '\0'; 1342 /* check to see if we are clearing primary */ 1343 if (!strlen(primary)) { 1344 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1345 RCU_INIT_POINTER(bond->primary_slave, NULL); 1346 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1347 bond_select_active_slave(bond); 1348 goto out; 1349 } 1350 1351 bond_for_each_slave(bond, slave, iter) { 1352 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1353 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); 1354 rcu_assign_pointer(bond->primary_slave, slave); 1355 strcpy(bond->params.primary, slave->dev->name); 1356 bond->force_primary = true; 1357 bond_select_active_slave(bond); 1358 goto out; 1359 } 1360 } 1361 1362 if (rtnl_dereference(bond->primary_slave)) { 1363 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1364 RCU_INIT_POINTER(bond->primary_slave, NULL); 1365 bond_select_active_slave(bond); 1366 } 1367 strscpy_pad(bond->params.primary, primary, IFNAMSIZ); 1368 1369 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", 1370 primary); 1371 1372 out: 1373 unblock_netpoll_tx(); 1374 1375 return 0; 1376 } 1377 1378 static int bond_option_primary_reselect_set(struct bonding *bond, 1379 const struct bond_opt_value *newval) 1380 { 1381 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", 1382 newval->string, newval->value); 1383 bond->params.primary_reselect = newval->value; 1384 1385 block_netpoll_tx(); 1386 bond_select_active_slave(bond); 1387 unblock_netpoll_tx(); 1388 1389 return 0; 1390 } 1391 1392 static int bond_option_fail_over_mac_set(struct bonding *bond, 1393 const struct bond_opt_value *newval) 1394 { 1395 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", 1396 newval->string, newval->value); 1397 bond->params.fail_over_mac = newval->value; 1398 1399 return 0; 1400 } 1401 1402 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1403 const struct bond_opt_value *newval) 1404 { 1405 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", 1406 newval->string, newval->value); 1407 bond->params.xmit_policy = newval->value; 1408 1409 return 0; 1410 } 1411 1412 static int bond_option_resend_igmp_set(struct bonding *bond, 1413 const struct bond_opt_value *newval) 1414 { 1415 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", 1416 newval->value); 1417 bond->params.resend_igmp = newval->value; 1418 1419 return 0; 1420 } 1421 1422 static int bond_option_num_peer_notif_set(struct bonding *bond, 1423 const struct bond_opt_value *newval) 1424 { 1425 bond->params.num_peer_notif = newval->value; 1426 1427 return 0; 1428 } 1429 1430 static int bond_option_all_slaves_active_set(struct bonding *bond, 1431 const struct bond_opt_value *newval) 1432 { 1433 struct list_head *iter; 1434 struct slave *slave; 1435 1436 if (newval->value == bond->params.all_slaves_active) 1437 return 0; 1438 bond->params.all_slaves_active = newval->value; 1439 bond_for_each_slave(bond, slave, iter) { 1440 if (!bond_is_active_slave(slave)) { 1441 if (newval->value) 1442 slave->inactive = 0; 1443 else 1444 slave->inactive = 1; 1445 } 1446 } 1447 1448 return 0; 1449 } 1450 1451 static int bond_option_min_links_set(struct bonding *bond, 1452 const struct bond_opt_value *newval) 1453 { 1454 netdev_dbg(bond->dev, "Setting min links value to %llu\n", 1455 newval->value); 1456 bond->params.min_links = newval->value; 1457 bond_set_carrier(bond); 1458 1459 return 0; 1460 } 1461 1462 static int bond_option_lp_interval_set(struct bonding *bond, 1463 const struct bond_opt_value *newval) 1464 { 1465 bond->params.lp_interval = newval->value; 1466 1467 return 0; 1468 } 1469 1470 static int bond_option_pps_set(struct bonding *bond, 1471 const struct bond_opt_value *newval) 1472 { 1473 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", 1474 newval->value); 1475 bond->params.packets_per_slave = newval->value; 1476 if (newval->value > 0) { 1477 bond->params.reciprocal_packets_per_slave = 1478 reciprocal_value(newval->value); 1479 } else { 1480 /* reciprocal_packets_per_slave is unused if 1481 * packets_per_slave is 0 or 1, just initialize it 1482 */ 1483 bond->params.reciprocal_packets_per_slave = 1484 (struct reciprocal_value) { 0 }; 1485 } 1486 1487 return 0; 1488 } 1489 1490 static int bond_option_lacp_active_set(struct bonding *bond, 1491 const struct bond_opt_value *newval) 1492 { 1493 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n", 1494 newval->string, newval->value); 1495 bond->params.lacp_active = newval->value; 1496 1497 return 0; 1498 } 1499 1500 static int bond_option_lacp_rate_set(struct bonding *bond, 1501 const struct bond_opt_value *newval) 1502 { 1503 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", 1504 newval->string, newval->value); 1505 bond->params.lacp_fast = newval->value; 1506 bond_3ad_update_lacp_rate(bond); 1507 1508 return 0; 1509 } 1510 1511 static int bond_option_ad_select_set(struct bonding *bond, 1512 const struct bond_opt_value *newval) 1513 { 1514 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", 1515 newval->string, newval->value); 1516 bond->params.ad_select = newval->value; 1517 1518 return 0; 1519 } 1520 1521 static int bond_option_queue_id_set(struct bonding *bond, 1522 const struct bond_opt_value *newval) 1523 { 1524 struct slave *slave, *update_slave; 1525 struct net_device *sdev; 1526 struct list_head *iter; 1527 char *delim; 1528 int ret = 0; 1529 u16 qid; 1530 1531 /* delim will point to queue id if successful */ 1532 delim = strchr(newval->string, ':'); 1533 if (!delim) 1534 goto err_no_cmd; 1535 1536 /* Terminate string that points to device name and bump it 1537 * up one, so we can read the queue id there. 1538 */ 1539 *delim = '\0'; 1540 if (sscanf(++delim, "%hd\n", &qid) != 1) 1541 goto err_no_cmd; 1542 1543 /* Check buffer length, valid ifname and queue id */ 1544 if (!dev_valid_name(newval->string) || 1545 qid > bond->dev->real_num_tx_queues) 1546 goto err_no_cmd; 1547 1548 /* Get the pointer to that interface if it exists */ 1549 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1550 if (!sdev) 1551 goto err_no_cmd; 1552 1553 /* Search for thes slave and check for duplicate qids */ 1554 update_slave = NULL; 1555 bond_for_each_slave(bond, slave, iter) { 1556 if (sdev == slave->dev) 1557 /* We don't need to check the matching 1558 * slave for dups, since we're overwriting it 1559 */ 1560 update_slave = slave; 1561 else if (qid && qid == slave->queue_id) { 1562 goto err_no_cmd; 1563 } 1564 } 1565 1566 if (!update_slave) 1567 goto err_no_cmd; 1568 1569 /* Actually set the qids for the slave */ 1570 update_slave->queue_id = qid; 1571 1572 out: 1573 return ret; 1574 1575 err_no_cmd: 1576 netdev_dbg(bond->dev, "invalid input for queue_id set\n"); 1577 ret = -EPERM; 1578 goto out; 1579 1580 } 1581 1582 static int bond_option_slaves_set(struct bonding *bond, 1583 const struct bond_opt_value *newval) 1584 { 1585 char command[IFNAMSIZ + 1] = { 0, }; 1586 struct net_device *dev; 1587 char *ifname; 1588 int ret; 1589 1590 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1591 ifname = command + 1; 1592 if ((strlen(command) <= 1) || 1593 (command[0] != '+' && command[0] != '-') || 1594 !dev_valid_name(ifname)) 1595 goto err_no_cmd; 1596 1597 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1598 if (!dev) { 1599 netdev_dbg(bond->dev, "interface %s does not exist!\n", 1600 ifname); 1601 ret = -ENODEV; 1602 goto out; 1603 } 1604 1605 switch (command[0]) { 1606 case '+': 1607 slave_dbg(bond->dev, dev, "Enslaving interface\n"); 1608 ret = bond_enslave(bond->dev, dev, NULL); 1609 break; 1610 1611 case '-': 1612 slave_dbg(bond->dev, dev, "Releasing interface\n"); 1613 ret = bond_release(bond->dev, dev); 1614 break; 1615 1616 default: 1617 /* should not run here. */ 1618 goto err_no_cmd; 1619 } 1620 1621 out: 1622 return ret; 1623 1624 err_no_cmd: 1625 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); 1626 ret = -EPERM; 1627 goto out; 1628 } 1629 1630 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1631 const struct bond_opt_value *newval) 1632 { 1633 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", 1634 newval->string, newval->value); 1635 bond->params.tlb_dynamic_lb = newval->value; 1636 1637 return 0; 1638 } 1639 1640 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 1641 const struct bond_opt_value *newval) 1642 { 1643 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", 1644 newval->value); 1645 1646 bond->params.ad_actor_sys_prio = newval->value; 1647 bond_3ad_update_ad_actor_settings(bond); 1648 1649 return 0; 1650 } 1651 1652 static int bond_option_ad_actor_system_set(struct bonding *bond, 1653 const struct bond_opt_value *newval) 1654 { 1655 u8 macaddr[ETH_ALEN]; 1656 u8 *mac; 1657 1658 if (newval->string) { 1659 if (!mac_pton(newval->string, macaddr)) 1660 goto err; 1661 mac = macaddr; 1662 } else { 1663 mac = (u8 *)&newval->value; 1664 } 1665 1666 if (is_multicast_ether_addr(mac)) 1667 goto err; 1668 1669 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); 1670 ether_addr_copy(bond->params.ad_actor_system, mac); 1671 bond_3ad_update_ad_actor_settings(bond); 1672 1673 return 0; 1674 1675 err: 1676 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); 1677 return -EINVAL; 1678 } 1679 1680 static int bond_option_ad_user_port_key_set(struct bonding *bond, 1681 const struct bond_opt_value *newval) 1682 { 1683 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", 1684 newval->value); 1685 1686 bond->params.ad_user_port_key = newval->value; 1687 return 0; 1688 } 1689