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_primary_set(struct bonding *bond, 44 const struct bond_opt_value *newval); 45 static int bond_option_primary_reselect_set(struct bonding *bond, 46 const struct bond_opt_value *newval); 47 static int bond_option_fail_over_mac_set(struct bonding *bond, 48 const struct bond_opt_value *newval); 49 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 50 const struct bond_opt_value *newval); 51 static int bond_option_resend_igmp_set(struct bonding *bond, 52 const struct bond_opt_value *newval); 53 static int bond_option_num_peer_notif_set(struct bonding *bond, 54 const struct bond_opt_value *newval); 55 static int bond_option_all_slaves_active_set(struct bonding *bond, 56 const struct bond_opt_value *newval); 57 static int bond_option_min_links_set(struct bonding *bond, 58 const struct bond_opt_value *newval); 59 static int bond_option_lp_interval_set(struct bonding *bond, 60 const struct bond_opt_value *newval); 61 static int bond_option_pps_set(struct bonding *bond, 62 const struct bond_opt_value *newval); 63 static int bond_option_lacp_active_set(struct bonding *bond, 64 const struct bond_opt_value *newval); 65 static int bond_option_lacp_rate_set(struct bonding *bond, 66 const struct bond_opt_value *newval); 67 static int bond_option_ad_select_set(struct bonding *bond, 68 const struct bond_opt_value *newval); 69 static int bond_option_queue_id_set(struct bonding *bond, 70 const struct bond_opt_value *newval); 71 static int bond_option_mode_set(struct bonding *bond, 72 const struct bond_opt_value *newval); 73 static int bond_option_slaves_set(struct bonding *bond, 74 const struct bond_opt_value *newval); 75 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 76 const struct bond_opt_value *newval); 77 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 78 const struct bond_opt_value *newval); 79 static int bond_option_ad_actor_system_set(struct bonding *bond, 80 const struct bond_opt_value *newval); 81 static int bond_option_ad_user_port_key_set(struct bonding *bond, 82 const struct bond_opt_value *newval); 83 static int bond_option_missed_max_set(struct bonding *bond, 84 const struct bond_opt_value *newval); 85 86 87 static const struct bond_opt_value bond_mode_tbl[] = { 88 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT}, 89 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0}, 90 { "balance-xor", BOND_MODE_XOR, 0}, 91 { "broadcast", BOND_MODE_BROADCAST, 0}, 92 { "802.3ad", BOND_MODE_8023AD, 0}, 93 { "balance-tlb", BOND_MODE_TLB, 0}, 94 { "balance-alb", BOND_MODE_ALB, 0}, 95 { NULL, -1, 0}, 96 }; 97 98 static const struct bond_opt_value bond_pps_tbl[] = { 99 { "default", 1, BOND_VALFLAG_DEFAULT}, 100 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX}, 101 { NULL, -1, 0}, 102 }; 103 104 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = { 105 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT}, 106 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0}, 107 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0}, 108 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0}, 109 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0}, 110 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0}, 111 { NULL, -1, 0}, 112 }; 113 114 static const struct bond_opt_value bond_arp_validate_tbl[] = { 115 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT}, 116 { "active", BOND_ARP_VALIDATE_ACTIVE, 0}, 117 { "backup", BOND_ARP_VALIDATE_BACKUP, 0}, 118 { "all", BOND_ARP_VALIDATE_ALL, 0}, 119 { "filter", BOND_ARP_FILTER, 0}, 120 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0}, 121 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0}, 122 { NULL, -1, 0}, 123 }; 124 125 static const struct bond_opt_value bond_arp_all_targets_tbl[] = { 126 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT}, 127 { "all", BOND_ARP_TARGETS_ALL, 0}, 128 { NULL, -1, 0}, 129 }; 130 131 static const struct bond_opt_value bond_fail_over_mac_tbl[] = { 132 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT}, 133 { "active", BOND_FOM_ACTIVE, 0}, 134 { "follow", BOND_FOM_FOLLOW, 0}, 135 { NULL, -1, 0}, 136 }; 137 138 static const struct bond_opt_value bond_intmax_tbl[] = { 139 { "off", 0, BOND_VALFLAG_DEFAULT}, 140 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 141 { NULL, -1, 0} 142 }; 143 144 static const struct bond_opt_value bond_lacp_active[] = { 145 { "off", 0, 0}, 146 { "on", 1, BOND_VALFLAG_DEFAULT}, 147 { NULL, -1, 0} 148 }; 149 150 static const struct bond_opt_value bond_lacp_rate_tbl[] = { 151 { "slow", AD_LACP_SLOW, 0}, 152 { "fast", AD_LACP_FAST, 0}, 153 { NULL, -1, 0}, 154 }; 155 156 static const struct bond_opt_value bond_ad_select_tbl[] = { 157 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT}, 158 { "bandwidth", BOND_AD_BANDWIDTH, 0}, 159 { "count", BOND_AD_COUNT, 0}, 160 { NULL, -1, 0}, 161 }; 162 163 static const struct bond_opt_value bond_num_peer_notif_tbl[] = { 164 { "off", 0, 0}, 165 { "maxval", 255, BOND_VALFLAG_MAX}, 166 { "default", 1, BOND_VALFLAG_DEFAULT}, 167 { NULL, -1, 0} 168 }; 169 170 static const struct bond_opt_value bond_primary_reselect_tbl[] = { 171 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT}, 172 { "better", BOND_PRI_RESELECT_BETTER, 0}, 173 { "failure", BOND_PRI_RESELECT_FAILURE, 0}, 174 { NULL, -1}, 175 }; 176 177 static const struct bond_opt_value bond_use_carrier_tbl[] = { 178 { "off", 0, 0}, 179 { "on", 1, BOND_VALFLAG_DEFAULT}, 180 { NULL, -1, 0} 181 }; 182 183 static const struct bond_opt_value bond_all_slaves_active_tbl[] = { 184 { "off", 0, BOND_VALFLAG_DEFAULT}, 185 { "on", 1, 0}, 186 { NULL, -1, 0} 187 }; 188 189 static const struct bond_opt_value bond_resend_igmp_tbl[] = { 190 { "off", 0, 0}, 191 { "maxval", 255, BOND_VALFLAG_MAX}, 192 { "default", 1, BOND_VALFLAG_DEFAULT}, 193 { NULL, -1, 0} 194 }; 195 196 static const struct bond_opt_value bond_lp_interval_tbl[] = { 197 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, 198 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 199 { NULL, -1, 0}, 200 }; 201 202 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = { 203 { "off", 0, 0}, 204 { "on", 1, BOND_VALFLAG_DEFAULT}, 205 { NULL, -1, 0} 206 }; 207 208 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = { 209 { "minval", 1, BOND_VALFLAG_MIN}, 210 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT}, 211 { NULL, -1, 0}, 212 }; 213 214 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = { 215 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, 216 { "maxval", 1023, BOND_VALFLAG_MAX}, 217 { NULL, -1, 0}, 218 }; 219 220 static const struct bond_opt_value bond_missed_max_tbl[] = { 221 { "minval", 1, BOND_VALFLAG_MIN}, 222 { "maxval", 255, BOND_VALFLAG_MAX}, 223 { "default", 2, BOND_VALFLAG_DEFAULT}, 224 { NULL, -1, 0}, 225 }; 226 227 static const struct bond_option bond_opts[BOND_OPT_LAST] = { 228 [BOND_OPT_MODE] = { 229 .id = BOND_OPT_MODE, 230 .name = "mode", 231 .desc = "bond device mode", 232 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN, 233 .values = bond_mode_tbl, 234 .set = bond_option_mode_set 235 }, 236 [BOND_OPT_PACKETS_PER_SLAVE] = { 237 .id = BOND_OPT_PACKETS_PER_SLAVE, 238 .name = "packets_per_slave", 239 .desc = "Packets to send per slave in RR mode", 240 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)), 241 .values = bond_pps_tbl, 242 .set = bond_option_pps_set 243 }, 244 [BOND_OPT_XMIT_HASH] = { 245 .id = BOND_OPT_XMIT_HASH, 246 .name = "xmit_hash_policy", 247 .desc = "balance-xor, 802.3ad, and tlb hashing method", 248 .values = bond_xmit_hashtype_tbl, 249 .set = bond_option_xmit_hash_policy_set 250 }, 251 [BOND_OPT_ARP_VALIDATE] = { 252 .id = BOND_OPT_ARP_VALIDATE, 253 .name = "arp_validate", 254 .desc = "validate src/dst of ARP probes", 255 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 256 BIT(BOND_MODE_ALB), 257 .values = bond_arp_validate_tbl, 258 .set = bond_option_arp_validate_set 259 }, 260 [BOND_OPT_ARP_ALL_TARGETS] = { 261 .id = BOND_OPT_ARP_ALL_TARGETS, 262 .name = "arp_all_targets", 263 .desc = "fail on any/all arp targets timeout", 264 .values = bond_arp_all_targets_tbl, 265 .set = bond_option_arp_all_targets_set 266 }, 267 [BOND_OPT_FAIL_OVER_MAC] = { 268 .id = BOND_OPT_FAIL_OVER_MAC, 269 .name = "fail_over_mac", 270 .desc = "For active-backup, do not set all slaves to the same MAC", 271 .flags = BOND_OPTFLAG_NOSLAVES, 272 .values = bond_fail_over_mac_tbl, 273 .set = bond_option_fail_over_mac_set 274 }, 275 [BOND_OPT_ARP_INTERVAL] = { 276 .id = BOND_OPT_ARP_INTERVAL, 277 .name = "arp_interval", 278 .desc = "arp interval in milliseconds", 279 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 280 BIT(BOND_MODE_ALB), 281 .values = bond_intmax_tbl, 282 .set = bond_option_arp_interval_set 283 }, 284 [BOND_OPT_MISSED_MAX] = { 285 .id = BOND_OPT_MISSED_MAX, 286 .name = "arp_missed_max", 287 .desc = "Maximum number of missed ARP interval", 288 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 289 BIT(BOND_MODE_ALB), 290 .values = bond_missed_max_tbl, 291 .set = bond_option_missed_max_set 292 }, 293 [BOND_OPT_ARP_TARGETS] = { 294 .id = BOND_OPT_ARP_TARGETS, 295 .name = "arp_ip_target", 296 .desc = "arp targets in n.n.n.n form", 297 .flags = BOND_OPTFLAG_RAWVAL, 298 .set = bond_option_arp_ip_targets_set 299 }, 300 [BOND_OPT_NS_TARGETS] = { 301 .id = BOND_OPT_NS_TARGETS, 302 .name = "ns_ip6_target", 303 .desc = "NS targets in ffff:ffff::ffff:ffff form", 304 .flags = BOND_OPTFLAG_RAWVAL, 305 .set = bond_option_ns_ip6_targets_set 306 }, 307 [BOND_OPT_DOWNDELAY] = { 308 .id = BOND_OPT_DOWNDELAY, 309 .name = "downdelay", 310 .desc = "Delay before considering link down, in milliseconds", 311 .values = bond_intmax_tbl, 312 .set = bond_option_downdelay_set 313 }, 314 [BOND_OPT_UPDELAY] = { 315 .id = BOND_OPT_UPDELAY, 316 .name = "updelay", 317 .desc = "Delay before considering link up, in milliseconds", 318 .values = bond_intmax_tbl, 319 .set = bond_option_updelay_set 320 }, 321 [BOND_OPT_LACP_ACTIVE] = { 322 .id = BOND_OPT_LACP_ACTIVE, 323 .name = "lacp_active", 324 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to", 325 .flags = BOND_OPTFLAG_IFDOWN, 326 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 327 .values = bond_lacp_active, 328 .set = bond_option_lacp_active_set 329 }, 330 [BOND_OPT_LACP_RATE] = { 331 .id = BOND_OPT_LACP_RATE, 332 .name = "lacp_rate", 333 .desc = "LACPDU tx rate to request from 802.3ad partner", 334 .flags = BOND_OPTFLAG_IFDOWN, 335 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 336 .values = bond_lacp_rate_tbl, 337 .set = bond_option_lacp_rate_set 338 }, 339 [BOND_OPT_MINLINKS] = { 340 .id = BOND_OPT_MINLINKS, 341 .name = "min_links", 342 .desc = "Minimum number of available links before turning on carrier", 343 .values = bond_intmax_tbl, 344 .set = bond_option_min_links_set 345 }, 346 [BOND_OPT_AD_SELECT] = { 347 .id = BOND_OPT_AD_SELECT, 348 .name = "ad_select", 349 .desc = "803.ad aggregation selection logic", 350 .flags = BOND_OPTFLAG_IFDOWN, 351 .values = bond_ad_select_tbl, 352 .set = bond_option_ad_select_set 353 }, 354 [BOND_OPT_NUM_PEER_NOTIF] = { 355 .id = BOND_OPT_NUM_PEER_NOTIF, 356 .name = "num_unsol_na", 357 .desc = "Number of peer notifications to send on failover event", 358 .values = bond_num_peer_notif_tbl, 359 .set = bond_option_num_peer_notif_set 360 }, 361 [BOND_OPT_MIIMON] = { 362 .id = BOND_OPT_MIIMON, 363 .name = "miimon", 364 .desc = "Link check interval in milliseconds", 365 .values = bond_intmax_tbl, 366 .set = bond_option_miimon_set 367 }, 368 [BOND_OPT_PRIMARY] = { 369 .id = BOND_OPT_PRIMARY, 370 .name = "primary", 371 .desc = "Primary network device to use", 372 .flags = BOND_OPTFLAG_RAWVAL, 373 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 374 BIT(BOND_MODE_TLB) | 375 BIT(BOND_MODE_ALB)), 376 .set = bond_option_primary_set 377 }, 378 [BOND_OPT_PRIMARY_RESELECT] = { 379 .id = BOND_OPT_PRIMARY_RESELECT, 380 .name = "primary_reselect", 381 .desc = "Reselect primary slave once it comes up", 382 .values = bond_primary_reselect_tbl, 383 .set = bond_option_primary_reselect_set 384 }, 385 [BOND_OPT_USE_CARRIER] = { 386 .id = BOND_OPT_USE_CARRIER, 387 .name = "use_carrier", 388 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon", 389 .values = bond_use_carrier_tbl, 390 .set = bond_option_use_carrier_set 391 }, 392 [BOND_OPT_ACTIVE_SLAVE] = { 393 .id = BOND_OPT_ACTIVE_SLAVE, 394 .name = "active_slave", 395 .desc = "Currently active slave", 396 .flags = BOND_OPTFLAG_RAWVAL, 397 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 398 BIT(BOND_MODE_TLB) | 399 BIT(BOND_MODE_ALB)), 400 .set = bond_option_active_slave_set 401 }, 402 [BOND_OPT_QUEUE_ID] = { 403 .id = BOND_OPT_QUEUE_ID, 404 .name = "queue_id", 405 .desc = "Set queue id of a slave", 406 .flags = BOND_OPTFLAG_RAWVAL, 407 .set = bond_option_queue_id_set 408 }, 409 [BOND_OPT_ALL_SLAVES_ACTIVE] = { 410 .id = BOND_OPT_ALL_SLAVES_ACTIVE, 411 .name = "all_slaves_active", 412 .desc = "Keep all frames received on an interface by setting active flag for all slaves", 413 .values = bond_all_slaves_active_tbl, 414 .set = bond_option_all_slaves_active_set 415 }, 416 [BOND_OPT_RESEND_IGMP] = { 417 .id = BOND_OPT_RESEND_IGMP, 418 .name = "resend_igmp", 419 .desc = "Number of IGMP membership reports to send on link failure", 420 .values = bond_resend_igmp_tbl, 421 .set = bond_option_resend_igmp_set 422 }, 423 [BOND_OPT_LP_INTERVAL] = { 424 .id = BOND_OPT_LP_INTERVAL, 425 .name = "lp_interval", 426 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch", 427 .values = bond_lp_interval_tbl, 428 .set = bond_option_lp_interval_set 429 }, 430 [BOND_OPT_SLAVES] = { 431 .id = BOND_OPT_SLAVES, 432 .name = "slaves", 433 .desc = "Slave membership management", 434 .flags = BOND_OPTFLAG_RAWVAL, 435 .set = bond_option_slaves_set 436 }, 437 [BOND_OPT_TLB_DYNAMIC_LB] = { 438 .id = BOND_OPT_TLB_DYNAMIC_LB, 439 .name = "tlb_dynamic_lb", 440 .desc = "Enable dynamic flow shuffling", 441 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)), 442 .values = bond_tlb_dynamic_lb_tbl, 443 .flags = BOND_OPTFLAG_IFDOWN, 444 .set = bond_option_tlb_dynamic_lb_set, 445 }, 446 [BOND_OPT_AD_ACTOR_SYS_PRIO] = { 447 .id = BOND_OPT_AD_ACTOR_SYS_PRIO, 448 .name = "ad_actor_sys_prio", 449 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 450 .values = bond_ad_actor_sys_prio_tbl, 451 .set = bond_option_ad_actor_sys_prio_set, 452 }, 453 [BOND_OPT_AD_ACTOR_SYSTEM] = { 454 .id = BOND_OPT_AD_ACTOR_SYSTEM, 455 .name = "ad_actor_system", 456 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 457 .flags = BOND_OPTFLAG_RAWVAL, 458 .set = bond_option_ad_actor_system_set, 459 }, 460 [BOND_OPT_AD_USER_PORT_KEY] = { 461 .id = BOND_OPT_AD_USER_PORT_KEY, 462 .name = "ad_user_port_key", 463 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 464 .flags = BOND_OPTFLAG_IFDOWN, 465 .values = bond_ad_user_port_key_tbl, 466 .set = bond_option_ad_user_port_key_set, 467 }, 468 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = { 469 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS, 470 .name = "num_grat_arp", 471 .desc = "Number of peer notifications to send on failover event", 472 .values = bond_num_peer_notif_tbl, 473 .set = bond_option_num_peer_notif_set 474 }, 475 [BOND_OPT_PEER_NOTIF_DELAY] = { 476 .id = BOND_OPT_PEER_NOTIF_DELAY, 477 .name = "peer_notif_delay", 478 .desc = "Delay between each peer notification on failover event, in milliseconds", 479 .values = bond_intmax_tbl, 480 .set = bond_option_peer_notif_delay_set 481 } 482 }; 483 484 /* Searches for an option by name */ 485 const struct bond_option *bond_opt_get_by_name(const char *name) 486 { 487 const struct bond_option *opt; 488 int option; 489 490 for (option = 0; option < BOND_OPT_LAST; option++) { 491 opt = bond_opt_get(option); 492 if (opt && !strcmp(opt->name, name)) 493 return opt; 494 } 495 496 return NULL; 497 } 498 499 /* Searches for a value in opt's values[] table */ 500 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val) 501 { 502 const struct bond_option *opt; 503 int i; 504 505 opt = bond_opt_get(option); 506 if (WARN_ON(!opt)) 507 return NULL; 508 for (i = 0; opt->values && opt->values[i].string; i++) 509 if (opt->values[i].value == val) 510 return &opt->values[i]; 511 512 return NULL; 513 } 514 515 /* Searches for a value in opt's values[] table which matches the flagmask */ 516 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt, 517 u32 flagmask) 518 { 519 int i; 520 521 for (i = 0; opt->values && opt->values[i].string; i++) 522 if (opt->values[i].flags & flagmask) 523 return &opt->values[i]; 524 525 return NULL; 526 } 527 528 /* If maxval is missing then there's no range to check. In case minval is 529 * missing then it's considered to be 0. 530 */ 531 static bool bond_opt_check_range(const struct bond_option *opt, u64 val) 532 { 533 const struct bond_opt_value *minval, *maxval; 534 535 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 536 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 537 if (!maxval || (minval && val < minval->value) || val > maxval->value) 538 return false; 539 540 return true; 541 } 542 543 /** 544 * bond_opt_parse - parse option value 545 * @opt: the option to parse against 546 * @val: value to parse 547 * 548 * This function tries to extract the value from @val and check if it's 549 * a possible match for the option and returns NULL if a match isn't found, 550 * or the struct_opt_value that matched. It also strips the new line from 551 * @val->string if it's present. 552 */ 553 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, 554 struct bond_opt_value *val) 555 { 556 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, }; 557 const struct bond_opt_value *tbl; 558 const struct bond_opt_value *ret = NULL; 559 bool checkval; 560 int i, rv; 561 562 /* No parsing if the option wants a raw val */ 563 if (opt->flags & BOND_OPTFLAG_RAWVAL) 564 return val; 565 566 tbl = opt->values; 567 if (!tbl) 568 goto out; 569 570 /* ULLONG_MAX is used to bypass string processing */ 571 checkval = val->value != ULLONG_MAX; 572 if (!checkval) { 573 if (!val->string) 574 goto out; 575 p = strchr(val->string, '\n'); 576 if (p) 577 *p = '\0'; 578 for (p = val->string; *p; p++) 579 if (!(isdigit(*p) || isspace(*p))) 580 break; 581 /* The following code extracts the string to match or the value 582 * and sets checkval appropriately 583 */ 584 if (*p) { 585 rv = sscanf(val->string, "%32s", valstr); 586 } else { 587 rv = sscanf(val->string, "%llu", &val->value); 588 checkval = true; 589 } 590 if (!rv) 591 goto out; 592 } 593 594 for (i = 0; tbl[i].string; i++) { 595 /* Check for exact match */ 596 if (checkval) { 597 if (val->value == tbl[i].value) 598 ret = &tbl[i]; 599 } else { 600 if (!strcmp(valstr, "default") && 601 (tbl[i].flags & BOND_VALFLAG_DEFAULT)) 602 ret = &tbl[i]; 603 604 if (!strcmp(valstr, tbl[i].string)) 605 ret = &tbl[i]; 606 } 607 /* Found an exact match */ 608 if (ret) 609 goto out; 610 } 611 /* Possible range match */ 612 if (checkval && bond_opt_check_range(opt, val->value)) 613 ret = val; 614 out: 615 return ret; 616 } 617 618 /* Check opt's dependencies against bond mode and currently set options */ 619 static int bond_opt_check_deps(struct bonding *bond, 620 const struct bond_option *opt) 621 { 622 struct bond_params *params = &bond->params; 623 624 if (test_bit(params->mode, &opt->unsuppmodes)) 625 return -EACCES; 626 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond)) 627 return -ENOTEMPTY; 628 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) 629 return -EBUSY; 630 631 return 0; 632 } 633 634 static void bond_opt_dep_print(struct bonding *bond, 635 const struct bond_option *opt, 636 struct nlattr *bad_attr, 637 struct netlink_ext_ack *extack) 638 { 639 const struct bond_opt_value *modeval; 640 struct bond_params *params; 641 642 params = &bond->params; 643 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); 644 if (test_bit(params->mode, &opt->unsuppmodes)) { 645 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n", 646 opt->name, modeval->string, modeval->value); 647 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 648 "option not supported in mode"); 649 } 650 } 651 652 static void bond_opt_error_interpret(struct bonding *bond, 653 const struct bond_option *opt, 654 int error, const struct bond_opt_value *val, 655 struct nlattr *bad_attr, 656 struct netlink_ext_ack *extack) 657 { 658 const struct bond_opt_value *minval, *maxval; 659 char *p; 660 661 switch (error) { 662 case -EINVAL: 663 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value"); 664 if (val) { 665 if (val->string) { 666 /* sometimes RAWVAL opts may have new lines */ 667 p = strchr(val->string, '\n'); 668 if (p) 669 *p = '\0'; 670 netdev_err(bond->dev, "option %s: invalid value (%s)\n", 671 opt->name, val->string); 672 } else { 673 netdev_err(bond->dev, "option %s: invalid value (%llu)\n", 674 opt->name, val->value); 675 } 676 } 677 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 678 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 679 if (!maxval) 680 break; 681 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n", 682 opt->name, minval ? minval->value : 0, maxval->value); 683 break; 684 case -EACCES: 685 bond_opt_dep_print(bond, opt, bad_attr, extack); 686 break; 687 case -ENOTEMPTY: 688 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 689 "unable to set option because the bond device has slaves"); 690 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n", 691 opt->name); 692 break; 693 case -EBUSY: 694 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 695 "unable to set option because the bond is up"); 696 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n", 697 opt->name); 698 break; 699 case -ENODEV: 700 if (val && val->string) { 701 p = strchr(val->string, '\n'); 702 if (p) 703 *p = '\0'; 704 netdev_err(bond->dev, "option %s: interface %s does not exist!\n", 705 opt->name, val->string); 706 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 707 "interface does not exist"); 708 } 709 break; 710 default: 711 break; 712 } 713 } 714 715 /** 716 * __bond_opt_set - set a bonding option 717 * @bond: target bond device 718 * @option: option to set 719 * @val: value to set it to 720 * @bad_attr: netlink attribue that caused the error 721 * @extack: extended netlink error structure, used when an error message 722 * needs to be returned to the caller via netlink 723 * 724 * This function is used to change the bond's option value, it can be 725 * used for both enabling/changing an option and for disabling it. RTNL lock 726 * must be obtained before calling this function. 727 */ 728 int __bond_opt_set(struct bonding *bond, 729 unsigned int option, struct bond_opt_value *val, 730 struct nlattr *bad_attr, struct netlink_ext_ack *extack) 731 { 732 const struct bond_opt_value *retval = NULL; 733 const struct bond_option *opt; 734 int ret = -ENOENT; 735 736 ASSERT_RTNL(); 737 738 opt = bond_opt_get(option); 739 if (WARN_ON(!val) || WARN_ON(!opt)) 740 goto out; 741 ret = bond_opt_check_deps(bond, opt); 742 if (ret) 743 goto out; 744 retval = bond_opt_parse(opt, val); 745 if (!retval) { 746 ret = -EINVAL; 747 goto out; 748 } 749 ret = opt->set(bond, retval); 750 out: 751 if (ret) 752 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack); 753 754 return ret; 755 } 756 /** 757 * __bond_opt_set_notify - set a bonding option 758 * @bond: target bond device 759 * @option: option to set 760 * @val: value to set it to 761 * 762 * This function is used to change the bond's option value and trigger 763 * a notification to user sapce. It can be used for both enabling/changing 764 * an option and for disabling it. RTNL lock must be obtained before calling 765 * this function. 766 */ 767 int __bond_opt_set_notify(struct bonding *bond, 768 unsigned int option, struct bond_opt_value *val) 769 { 770 int ret; 771 772 ASSERT_RTNL(); 773 774 ret = __bond_opt_set(bond, option, val, NULL, NULL); 775 776 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED)) 777 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev); 778 779 return ret; 780 } 781 782 /** 783 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set 784 * @bond: target bond device 785 * @option: option to set 786 * @buf: value to set it to 787 * 788 * This function tries to acquire RTNL without blocking and if successful 789 * calls __bond_opt_set. It is mainly used for sysfs option manipulation. 790 */ 791 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) 792 { 793 struct bond_opt_value optval; 794 int ret; 795 796 if (!rtnl_trylock()) 797 return restart_syscall(); 798 bond_opt_initstr(&optval, buf); 799 ret = __bond_opt_set_notify(bond, option, &optval); 800 rtnl_unlock(); 801 802 return ret; 803 } 804 805 /** 806 * bond_opt_get - get a pointer to an option 807 * @option: option for which to return a pointer 808 * 809 * This function checks if option is valid and if so returns a pointer 810 * to its entry in the bond_opts[] option array. 811 */ 812 const struct bond_option *bond_opt_get(unsigned int option) 813 { 814 if (!BOND_OPT_VALID(option)) 815 return NULL; 816 817 return &bond_opts[option]; 818 } 819 820 static bool bond_set_xfrm_features(struct bonding *bond) 821 { 822 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD)) 823 return false; 824 825 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) 826 bond->dev->wanted_features |= BOND_XFRM_FEATURES; 827 else 828 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES; 829 830 return true; 831 } 832 833 static bool bond_set_tls_features(struct bonding *bond) 834 { 835 if (!IS_ENABLED(CONFIG_TLS_DEVICE)) 836 return false; 837 838 if (bond_sk_check(bond)) 839 bond->dev->wanted_features |= BOND_TLS_FEATURES; 840 else 841 bond->dev->wanted_features &= ~BOND_TLS_FEATURES; 842 843 return true; 844 } 845 846 static int bond_option_mode_set(struct bonding *bond, 847 const struct bond_opt_value *newval) 848 { 849 if (!bond_mode_uses_arp(newval->value)) { 850 if (bond->params.arp_interval) { 851 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", 852 newval->string); 853 /* disable arp monitoring */ 854 bond->params.arp_interval = 0; 855 } 856 857 if (!bond->params.miimon) { 858 /* set miimon to default value */ 859 bond->params.miimon = BOND_DEFAULT_MIIMON; 860 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", 861 bond->params.miimon); 862 } 863 } 864 865 if (newval->value == BOND_MODE_ALB) 866 bond->params.tlb_dynamic_lb = 1; 867 868 /* don't cache arp_validate between modes */ 869 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 870 bond->params.mode = newval->value; 871 872 if (bond->dev->reg_state == NETREG_REGISTERED) { 873 bool update = false; 874 875 update |= bond_set_xfrm_features(bond); 876 update |= bond_set_tls_features(bond); 877 878 if (update) 879 netdev_update_features(bond->dev); 880 } 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_primary_set(struct bonding *bond, 1310 const struct bond_opt_value *newval) 1311 { 1312 char *p, *primary = newval->string; 1313 struct list_head *iter; 1314 struct slave *slave; 1315 1316 block_netpoll_tx(); 1317 1318 p = strchr(primary, '\n'); 1319 if (p) 1320 *p = '\0'; 1321 /* check to see if we are clearing primary */ 1322 if (!strlen(primary)) { 1323 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1324 RCU_INIT_POINTER(bond->primary_slave, NULL); 1325 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1326 bond_select_active_slave(bond); 1327 goto out; 1328 } 1329 1330 bond_for_each_slave(bond, slave, iter) { 1331 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1332 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); 1333 rcu_assign_pointer(bond->primary_slave, slave); 1334 strcpy(bond->params.primary, slave->dev->name); 1335 bond->force_primary = true; 1336 bond_select_active_slave(bond); 1337 goto out; 1338 } 1339 } 1340 1341 if (rtnl_dereference(bond->primary_slave)) { 1342 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1343 RCU_INIT_POINTER(bond->primary_slave, NULL); 1344 bond_select_active_slave(bond); 1345 } 1346 strscpy_pad(bond->params.primary, primary, IFNAMSIZ); 1347 1348 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", 1349 primary); 1350 1351 out: 1352 unblock_netpoll_tx(); 1353 1354 return 0; 1355 } 1356 1357 static int bond_option_primary_reselect_set(struct bonding *bond, 1358 const struct bond_opt_value *newval) 1359 { 1360 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", 1361 newval->string, newval->value); 1362 bond->params.primary_reselect = newval->value; 1363 1364 block_netpoll_tx(); 1365 bond_select_active_slave(bond); 1366 unblock_netpoll_tx(); 1367 1368 return 0; 1369 } 1370 1371 static int bond_option_fail_over_mac_set(struct bonding *bond, 1372 const struct bond_opt_value *newval) 1373 { 1374 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", 1375 newval->string, newval->value); 1376 bond->params.fail_over_mac = newval->value; 1377 1378 return 0; 1379 } 1380 1381 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1382 const struct bond_opt_value *newval) 1383 { 1384 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", 1385 newval->string, newval->value); 1386 bond->params.xmit_policy = newval->value; 1387 1388 if (bond->dev->reg_state == NETREG_REGISTERED) 1389 if (bond_set_tls_features(bond)) 1390 netdev_update_features(bond->dev); 1391 1392 return 0; 1393 } 1394 1395 static int bond_option_resend_igmp_set(struct bonding *bond, 1396 const struct bond_opt_value *newval) 1397 { 1398 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", 1399 newval->value); 1400 bond->params.resend_igmp = newval->value; 1401 1402 return 0; 1403 } 1404 1405 static int bond_option_num_peer_notif_set(struct bonding *bond, 1406 const struct bond_opt_value *newval) 1407 { 1408 bond->params.num_peer_notif = newval->value; 1409 1410 return 0; 1411 } 1412 1413 static int bond_option_all_slaves_active_set(struct bonding *bond, 1414 const struct bond_opt_value *newval) 1415 { 1416 struct list_head *iter; 1417 struct slave *slave; 1418 1419 if (newval->value == bond->params.all_slaves_active) 1420 return 0; 1421 bond->params.all_slaves_active = newval->value; 1422 bond_for_each_slave(bond, slave, iter) { 1423 if (!bond_is_active_slave(slave)) { 1424 if (newval->value) 1425 slave->inactive = 0; 1426 else 1427 slave->inactive = 1; 1428 } 1429 } 1430 1431 return 0; 1432 } 1433 1434 static int bond_option_min_links_set(struct bonding *bond, 1435 const struct bond_opt_value *newval) 1436 { 1437 netdev_dbg(bond->dev, "Setting min links value to %llu\n", 1438 newval->value); 1439 bond->params.min_links = newval->value; 1440 bond_set_carrier(bond); 1441 1442 return 0; 1443 } 1444 1445 static int bond_option_lp_interval_set(struct bonding *bond, 1446 const struct bond_opt_value *newval) 1447 { 1448 bond->params.lp_interval = newval->value; 1449 1450 return 0; 1451 } 1452 1453 static int bond_option_pps_set(struct bonding *bond, 1454 const struct bond_opt_value *newval) 1455 { 1456 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", 1457 newval->value); 1458 bond->params.packets_per_slave = newval->value; 1459 if (newval->value > 0) { 1460 bond->params.reciprocal_packets_per_slave = 1461 reciprocal_value(newval->value); 1462 } else { 1463 /* reciprocal_packets_per_slave is unused if 1464 * packets_per_slave is 0 or 1, just initialize it 1465 */ 1466 bond->params.reciprocal_packets_per_slave = 1467 (struct reciprocal_value) { 0 }; 1468 } 1469 1470 return 0; 1471 } 1472 1473 static int bond_option_lacp_active_set(struct bonding *bond, 1474 const struct bond_opt_value *newval) 1475 { 1476 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n", 1477 newval->string, newval->value); 1478 bond->params.lacp_active = newval->value; 1479 1480 return 0; 1481 } 1482 1483 static int bond_option_lacp_rate_set(struct bonding *bond, 1484 const struct bond_opt_value *newval) 1485 { 1486 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", 1487 newval->string, newval->value); 1488 bond->params.lacp_fast = newval->value; 1489 bond_3ad_update_lacp_rate(bond); 1490 1491 return 0; 1492 } 1493 1494 static int bond_option_ad_select_set(struct bonding *bond, 1495 const struct bond_opt_value *newval) 1496 { 1497 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", 1498 newval->string, newval->value); 1499 bond->params.ad_select = newval->value; 1500 1501 return 0; 1502 } 1503 1504 static int bond_option_queue_id_set(struct bonding *bond, 1505 const struct bond_opt_value *newval) 1506 { 1507 struct slave *slave, *update_slave; 1508 struct net_device *sdev; 1509 struct list_head *iter; 1510 char *delim; 1511 int ret = 0; 1512 u16 qid; 1513 1514 /* delim will point to queue id if successful */ 1515 delim = strchr(newval->string, ':'); 1516 if (!delim) 1517 goto err_no_cmd; 1518 1519 /* Terminate string that points to device name and bump it 1520 * up one, so we can read the queue id there. 1521 */ 1522 *delim = '\0'; 1523 if (sscanf(++delim, "%hd\n", &qid) != 1) 1524 goto err_no_cmd; 1525 1526 /* Check buffer length, valid ifname and queue id */ 1527 if (!dev_valid_name(newval->string) || 1528 qid > bond->dev->real_num_tx_queues) 1529 goto err_no_cmd; 1530 1531 /* Get the pointer to that interface if it exists */ 1532 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1533 if (!sdev) 1534 goto err_no_cmd; 1535 1536 /* Search for thes slave and check for duplicate qids */ 1537 update_slave = NULL; 1538 bond_for_each_slave(bond, slave, iter) { 1539 if (sdev == slave->dev) 1540 /* We don't need to check the matching 1541 * slave for dups, since we're overwriting it 1542 */ 1543 update_slave = slave; 1544 else if (qid && qid == slave->queue_id) { 1545 goto err_no_cmd; 1546 } 1547 } 1548 1549 if (!update_slave) 1550 goto err_no_cmd; 1551 1552 /* Actually set the qids for the slave */ 1553 update_slave->queue_id = qid; 1554 1555 out: 1556 return ret; 1557 1558 err_no_cmd: 1559 netdev_dbg(bond->dev, "invalid input for queue_id set\n"); 1560 ret = -EPERM; 1561 goto out; 1562 1563 } 1564 1565 static int bond_option_slaves_set(struct bonding *bond, 1566 const struct bond_opt_value *newval) 1567 { 1568 char command[IFNAMSIZ + 1] = { 0, }; 1569 struct net_device *dev; 1570 char *ifname; 1571 int ret; 1572 1573 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1574 ifname = command + 1; 1575 if ((strlen(command) <= 1) || 1576 (command[0] != '+' && command[0] != '-') || 1577 !dev_valid_name(ifname)) 1578 goto err_no_cmd; 1579 1580 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1581 if (!dev) { 1582 netdev_dbg(bond->dev, "interface %s does not exist!\n", 1583 ifname); 1584 ret = -ENODEV; 1585 goto out; 1586 } 1587 1588 switch (command[0]) { 1589 case '+': 1590 slave_dbg(bond->dev, dev, "Enslaving interface\n"); 1591 ret = bond_enslave(bond->dev, dev, NULL); 1592 break; 1593 1594 case '-': 1595 slave_dbg(bond->dev, dev, "Releasing interface\n"); 1596 ret = bond_release(bond->dev, dev); 1597 break; 1598 1599 default: 1600 /* should not run here. */ 1601 goto err_no_cmd; 1602 } 1603 1604 out: 1605 return ret; 1606 1607 err_no_cmd: 1608 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); 1609 ret = -EPERM; 1610 goto out; 1611 } 1612 1613 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1614 const struct bond_opt_value *newval) 1615 { 1616 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", 1617 newval->string, newval->value); 1618 bond->params.tlb_dynamic_lb = newval->value; 1619 1620 return 0; 1621 } 1622 1623 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 1624 const struct bond_opt_value *newval) 1625 { 1626 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", 1627 newval->value); 1628 1629 bond->params.ad_actor_sys_prio = newval->value; 1630 bond_3ad_update_ad_actor_settings(bond); 1631 1632 return 0; 1633 } 1634 1635 static int bond_option_ad_actor_system_set(struct bonding *bond, 1636 const struct bond_opt_value *newval) 1637 { 1638 u8 macaddr[ETH_ALEN]; 1639 u8 *mac; 1640 1641 if (newval->string) { 1642 if (!mac_pton(newval->string, macaddr)) 1643 goto err; 1644 mac = macaddr; 1645 } else { 1646 mac = (u8 *)&newval->value; 1647 } 1648 1649 if (is_multicast_ether_addr(mac)) 1650 goto err; 1651 1652 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); 1653 ether_addr_copy(bond->params.ad_actor_system, mac); 1654 bond_3ad_update_ad_actor_settings(bond); 1655 1656 return 0; 1657 1658 err: 1659 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); 1660 return -EINVAL; 1661 } 1662 1663 static int bond_option_ad_user_port_key_set(struct bonding *bond, 1664 const struct bond_opt_value *newval) 1665 { 1666 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", 1667 newval->value); 1668 1669 bond->params.ad_user_port_key = newval->value; 1670 return 0; 1671 } 1672