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