1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/net/bond/bond_options.c - bonding options 4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> 5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> 6 */ 7 8 #include <linux/errno.h> 9 #include <linux/if.h> 10 #include <linux/netdevice.h> 11 #include <linux/spinlock.h> 12 #include <linux/rcupdate.h> 13 #include <linux/ctype.h> 14 #include <linux/inet.h> 15 #include <linux/sched/signal.h> 16 17 #include <net/bonding.h> 18 19 static int bond_option_active_slave_set(struct bonding *bond, 20 const struct bond_opt_value *newval); 21 static int bond_option_miimon_set(struct bonding *bond, 22 const struct bond_opt_value *newval); 23 static int bond_option_updelay_set(struct bonding *bond, 24 const struct bond_opt_value *newval); 25 static int bond_option_downdelay_set(struct bonding *bond, 26 const struct bond_opt_value *newval); 27 static int bond_option_peer_notif_delay_set(struct bonding *bond, 28 const struct bond_opt_value *newval); 29 static int bond_option_use_carrier_set(struct bonding *bond, 30 const struct bond_opt_value *newval); 31 static int bond_option_arp_interval_set(struct bonding *bond, 32 const struct bond_opt_value *newval); 33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target); 34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target); 35 static int bond_option_arp_ip_targets_set(struct bonding *bond, 36 const struct bond_opt_value *newval); 37 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 38 const struct bond_opt_value *newval); 39 static int bond_option_arp_validate_set(struct bonding *bond, 40 const struct bond_opt_value *newval); 41 static int bond_option_arp_all_targets_set(struct bonding *bond, 42 const struct bond_opt_value *newval); 43 static int bond_option_prio_set(struct bonding *bond, 44 const struct bond_opt_value *newval); 45 static int bond_option_primary_set(struct bonding *bond, 46 const struct bond_opt_value *newval); 47 static int bond_option_primary_reselect_set(struct bonding *bond, 48 const struct bond_opt_value *newval); 49 static int bond_option_fail_over_mac_set(struct bonding *bond, 50 const struct bond_opt_value *newval); 51 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 52 const struct bond_opt_value *newval); 53 static int bond_option_resend_igmp_set(struct bonding *bond, 54 const struct bond_opt_value *newval); 55 static int bond_option_num_peer_notif_set(struct bonding *bond, 56 const struct bond_opt_value *newval); 57 static int bond_option_all_slaves_active_set(struct bonding *bond, 58 const struct bond_opt_value *newval); 59 static int bond_option_min_links_set(struct bonding *bond, 60 const struct bond_opt_value *newval); 61 static int bond_option_lp_interval_set(struct bonding *bond, 62 const struct bond_opt_value *newval); 63 static int bond_option_pps_set(struct bonding *bond, 64 const struct bond_opt_value *newval); 65 static int bond_option_lacp_active_set(struct bonding *bond, 66 const struct bond_opt_value *newval); 67 static int bond_option_lacp_rate_set(struct bonding *bond, 68 const struct bond_opt_value *newval); 69 static int bond_option_ad_select_set(struct bonding *bond, 70 const struct bond_opt_value *newval); 71 static int bond_option_queue_id_set(struct bonding *bond, 72 const struct bond_opt_value *newval); 73 static int bond_option_mode_set(struct bonding *bond, 74 const struct bond_opt_value *newval); 75 static int bond_option_slaves_set(struct bonding *bond, 76 const struct bond_opt_value *newval); 77 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 78 const struct bond_opt_value *newval); 79 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 80 const struct bond_opt_value *newval); 81 static int bond_option_ad_actor_system_set(struct bonding *bond, 82 const struct bond_opt_value *newval); 83 static int bond_option_ad_user_port_key_set(struct bonding *bond, 84 const struct bond_opt_value *newval); 85 static int bond_option_missed_max_set(struct bonding *bond, 86 const struct bond_opt_value *newval); 87 88 89 static const struct bond_opt_value bond_mode_tbl[] = { 90 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT}, 91 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0}, 92 { "balance-xor", BOND_MODE_XOR, 0}, 93 { "broadcast", BOND_MODE_BROADCAST, 0}, 94 { "802.3ad", BOND_MODE_8023AD, 0}, 95 { "balance-tlb", BOND_MODE_TLB, 0}, 96 { "balance-alb", BOND_MODE_ALB, 0}, 97 { NULL, -1, 0}, 98 }; 99 100 static const struct bond_opt_value bond_pps_tbl[] = { 101 { "default", 1, BOND_VALFLAG_DEFAULT}, 102 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX}, 103 { NULL, -1, 0}, 104 }; 105 106 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = { 107 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT}, 108 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0}, 109 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0}, 110 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0}, 111 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0}, 112 { "vlan+srcmac", BOND_XMIT_POLICY_VLAN_SRCMAC, 0}, 113 { NULL, -1, 0}, 114 }; 115 116 static const struct bond_opt_value bond_arp_validate_tbl[] = { 117 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT}, 118 { "active", BOND_ARP_VALIDATE_ACTIVE, 0}, 119 { "backup", BOND_ARP_VALIDATE_BACKUP, 0}, 120 { "all", BOND_ARP_VALIDATE_ALL, 0}, 121 { "filter", BOND_ARP_FILTER, 0}, 122 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0}, 123 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0}, 124 { NULL, -1, 0}, 125 }; 126 127 static const struct bond_opt_value bond_arp_all_targets_tbl[] = { 128 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT}, 129 { "all", BOND_ARP_TARGETS_ALL, 0}, 130 { NULL, -1, 0}, 131 }; 132 133 static const struct bond_opt_value bond_fail_over_mac_tbl[] = { 134 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT}, 135 { "active", BOND_FOM_ACTIVE, 0}, 136 { "follow", BOND_FOM_FOLLOW, 0}, 137 { NULL, -1, 0}, 138 }; 139 140 static const struct bond_opt_value bond_intmax_tbl[] = { 141 { "off", 0, BOND_VALFLAG_DEFAULT}, 142 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 143 { NULL, -1, 0} 144 }; 145 146 static const struct bond_opt_value bond_lacp_active[] = { 147 { "off", 0, 0}, 148 { "on", 1, BOND_VALFLAG_DEFAULT}, 149 { NULL, -1, 0} 150 }; 151 152 static const struct bond_opt_value bond_lacp_rate_tbl[] = { 153 { "slow", AD_LACP_SLOW, 0}, 154 { "fast", AD_LACP_FAST, 0}, 155 { NULL, -1, 0}, 156 }; 157 158 static const struct bond_opt_value bond_ad_select_tbl[] = { 159 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT}, 160 { "bandwidth", BOND_AD_BANDWIDTH, 0}, 161 { "count", BOND_AD_COUNT, 0}, 162 { NULL, -1, 0}, 163 }; 164 165 static const struct bond_opt_value bond_num_peer_notif_tbl[] = { 166 { "off", 0, 0}, 167 { "maxval", 255, BOND_VALFLAG_MAX}, 168 { "default", 1, BOND_VALFLAG_DEFAULT}, 169 { NULL, -1, 0} 170 }; 171 172 static const struct bond_opt_value bond_peer_notif_delay_tbl[] = { 173 { "off", 0, 0}, 174 { "maxval", 300000, BOND_VALFLAG_MAX}, 175 { NULL, -1, 0} 176 }; 177 178 static const struct bond_opt_value bond_primary_reselect_tbl[] = { 179 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT}, 180 { "better", BOND_PRI_RESELECT_BETTER, 0}, 181 { "failure", BOND_PRI_RESELECT_FAILURE, 0}, 182 { NULL, -1}, 183 }; 184 185 static const struct bond_opt_value bond_use_carrier_tbl[] = { 186 { "off", 0, 0}, 187 { "on", 1, BOND_VALFLAG_DEFAULT}, 188 { NULL, -1, 0} 189 }; 190 191 static const struct bond_opt_value bond_all_slaves_active_tbl[] = { 192 { "off", 0, BOND_VALFLAG_DEFAULT}, 193 { "on", 1, 0}, 194 { NULL, -1, 0} 195 }; 196 197 static const struct bond_opt_value bond_resend_igmp_tbl[] = { 198 { "off", 0, 0}, 199 { "maxval", 255, BOND_VALFLAG_MAX}, 200 { "default", 1, BOND_VALFLAG_DEFAULT}, 201 { NULL, -1, 0} 202 }; 203 204 static const struct bond_opt_value bond_lp_interval_tbl[] = { 205 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, 206 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 207 { NULL, -1, 0}, 208 }; 209 210 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = { 211 { "off", 0, 0}, 212 { "on", 1, BOND_VALFLAG_DEFAULT}, 213 { NULL, -1, 0} 214 }; 215 216 static const struct bond_opt_value bond_ad_actor_sys_prio_tbl[] = { 217 { "minval", 1, BOND_VALFLAG_MIN}, 218 { "maxval", 65535, BOND_VALFLAG_MAX | BOND_VALFLAG_DEFAULT}, 219 { NULL, -1, 0}, 220 }; 221 222 static const struct bond_opt_value bond_ad_user_port_key_tbl[] = { 223 { "minval", 0, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, 224 { "maxval", 1023, BOND_VALFLAG_MAX}, 225 { NULL, -1, 0}, 226 }; 227 228 static const struct bond_opt_value bond_missed_max_tbl[] = { 229 { "minval", 1, BOND_VALFLAG_MIN}, 230 { "maxval", 255, BOND_VALFLAG_MAX}, 231 { "default", 2, BOND_VALFLAG_DEFAULT}, 232 { NULL, -1, 0}, 233 }; 234 235 static const struct bond_option bond_opts[BOND_OPT_LAST] = { 236 [BOND_OPT_MODE] = { 237 .id = BOND_OPT_MODE, 238 .name = "mode", 239 .desc = "bond device mode", 240 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN, 241 .values = bond_mode_tbl, 242 .set = bond_option_mode_set 243 }, 244 [BOND_OPT_PACKETS_PER_SLAVE] = { 245 .id = BOND_OPT_PACKETS_PER_SLAVE, 246 .name = "packets_per_slave", 247 .desc = "Packets to send per slave in RR mode", 248 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)), 249 .values = bond_pps_tbl, 250 .set = bond_option_pps_set 251 }, 252 [BOND_OPT_XMIT_HASH] = { 253 .id = BOND_OPT_XMIT_HASH, 254 .name = "xmit_hash_policy", 255 .desc = "balance-xor, 802.3ad, and tlb hashing method", 256 .values = bond_xmit_hashtype_tbl, 257 .set = bond_option_xmit_hash_policy_set 258 }, 259 [BOND_OPT_ARP_VALIDATE] = { 260 .id = BOND_OPT_ARP_VALIDATE, 261 .name = "arp_validate", 262 .desc = "validate src/dst of ARP probes", 263 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 264 BIT(BOND_MODE_ALB), 265 .values = bond_arp_validate_tbl, 266 .set = bond_option_arp_validate_set 267 }, 268 [BOND_OPT_ARP_ALL_TARGETS] = { 269 .id = BOND_OPT_ARP_ALL_TARGETS, 270 .name = "arp_all_targets", 271 .desc = "fail on any/all arp targets timeout", 272 .values = bond_arp_all_targets_tbl, 273 .set = bond_option_arp_all_targets_set 274 }, 275 [BOND_OPT_FAIL_OVER_MAC] = { 276 .id = BOND_OPT_FAIL_OVER_MAC, 277 .name = "fail_over_mac", 278 .desc = "For active-backup, do not set all slaves to the same MAC", 279 .flags = BOND_OPTFLAG_NOSLAVES, 280 .values = bond_fail_over_mac_tbl, 281 .set = bond_option_fail_over_mac_set 282 }, 283 [BOND_OPT_ARP_INTERVAL] = { 284 .id = BOND_OPT_ARP_INTERVAL, 285 .name = "arp_interval", 286 .desc = "arp interval in milliseconds", 287 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 288 BIT(BOND_MODE_ALB), 289 .values = bond_intmax_tbl, 290 .set = bond_option_arp_interval_set 291 }, 292 [BOND_OPT_MISSED_MAX] = { 293 .id = BOND_OPT_MISSED_MAX, 294 .name = "arp_missed_max", 295 .desc = "Maximum number of missed ARP interval", 296 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 297 BIT(BOND_MODE_ALB), 298 .values = bond_missed_max_tbl, 299 .set = bond_option_missed_max_set 300 }, 301 [BOND_OPT_ARP_TARGETS] = { 302 .id = BOND_OPT_ARP_TARGETS, 303 .name = "arp_ip_target", 304 .desc = "arp targets in n.n.n.n form", 305 .flags = BOND_OPTFLAG_RAWVAL, 306 .set = bond_option_arp_ip_targets_set 307 }, 308 [BOND_OPT_NS_TARGETS] = { 309 .id = BOND_OPT_NS_TARGETS, 310 .name = "ns_ip6_target", 311 .desc = "NS targets in ffff:ffff::ffff:ffff form", 312 .flags = BOND_OPTFLAG_RAWVAL, 313 .set = bond_option_ns_ip6_targets_set 314 }, 315 [BOND_OPT_DOWNDELAY] = { 316 .id = BOND_OPT_DOWNDELAY, 317 .name = "downdelay", 318 .desc = "Delay before considering link down, in milliseconds", 319 .values = bond_intmax_tbl, 320 .set = bond_option_downdelay_set 321 }, 322 [BOND_OPT_UPDELAY] = { 323 .id = BOND_OPT_UPDELAY, 324 .name = "updelay", 325 .desc = "Delay before considering link up, in milliseconds", 326 .values = bond_intmax_tbl, 327 .set = bond_option_updelay_set 328 }, 329 [BOND_OPT_LACP_ACTIVE] = { 330 .id = BOND_OPT_LACP_ACTIVE, 331 .name = "lacp_active", 332 .desc = "Send LACPDU frames with configured lacp rate or acts as speak when spoken to", 333 .flags = BOND_OPTFLAG_IFDOWN, 334 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 335 .values = bond_lacp_active, 336 .set = bond_option_lacp_active_set 337 }, 338 [BOND_OPT_LACP_RATE] = { 339 .id = BOND_OPT_LACP_RATE, 340 .name = "lacp_rate", 341 .desc = "LACPDU tx rate to request from 802.3ad partner", 342 .flags = BOND_OPTFLAG_IFDOWN, 343 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 344 .values = bond_lacp_rate_tbl, 345 .set = bond_option_lacp_rate_set 346 }, 347 [BOND_OPT_MINLINKS] = { 348 .id = BOND_OPT_MINLINKS, 349 .name = "min_links", 350 .desc = "Minimum number of available links before turning on carrier", 351 .values = bond_intmax_tbl, 352 .set = bond_option_min_links_set 353 }, 354 [BOND_OPT_AD_SELECT] = { 355 .id = BOND_OPT_AD_SELECT, 356 .name = "ad_select", 357 .desc = "803.ad aggregation selection logic", 358 .flags = BOND_OPTFLAG_IFDOWN, 359 .values = bond_ad_select_tbl, 360 .set = bond_option_ad_select_set 361 }, 362 [BOND_OPT_NUM_PEER_NOTIF] = { 363 .id = BOND_OPT_NUM_PEER_NOTIF, 364 .name = "num_unsol_na", 365 .desc = "Number of peer notifications to send on failover event", 366 .values = bond_num_peer_notif_tbl, 367 .set = bond_option_num_peer_notif_set 368 }, 369 [BOND_OPT_MIIMON] = { 370 .id = BOND_OPT_MIIMON, 371 .name = "miimon", 372 .desc = "Link check interval in milliseconds", 373 .values = bond_intmax_tbl, 374 .set = bond_option_miimon_set 375 }, 376 [BOND_OPT_PRIO] = { 377 .id = BOND_OPT_PRIO, 378 .name = "prio", 379 .desc = "Link priority for failover re-selection", 380 .flags = BOND_OPTFLAG_RAWVAL, 381 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 382 BIT(BOND_MODE_TLB) | 383 BIT(BOND_MODE_ALB)), 384 .set = bond_option_prio_set 385 }, 386 [BOND_OPT_PRIMARY] = { 387 .id = BOND_OPT_PRIMARY, 388 .name = "primary", 389 .desc = "Primary network device to use", 390 .flags = BOND_OPTFLAG_RAWVAL, 391 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 392 BIT(BOND_MODE_TLB) | 393 BIT(BOND_MODE_ALB)), 394 .set = bond_option_primary_set 395 }, 396 [BOND_OPT_PRIMARY_RESELECT] = { 397 .id = BOND_OPT_PRIMARY_RESELECT, 398 .name = "primary_reselect", 399 .desc = "Reselect primary slave once it comes up", 400 .values = bond_primary_reselect_tbl, 401 .set = bond_option_primary_reselect_set 402 }, 403 [BOND_OPT_USE_CARRIER] = { 404 .id = BOND_OPT_USE_CARRIER, 405 .name = "use_carrier", 406 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon", 407 .values = bond_use_carrier_tbl, 408 .set = bond_option_use_carrier_set 409 }, 410 [BOND_OPT_ACTIVE_SLAVE] = { 411 .id = BOND_OPT_ACTIVE_SLAVE, 412 .name = "active_slave", 413 .desc = "Currently active slave", 414 .flags = BOND_OPTFLAG_RAWVAL, 415 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 416 BIT(BOND_MODE_TLB) | 417 BIT(BOND_MODE_ALB)), 418 .set = bond_option_active_slave_set 419 }, 420 [BOND_OPT_QUEUE_ID] = { 421 .id = BOND_OPT_QUEUE_ID, 422 .name = "queue_id", 423 .desc = "Set queue id of a slave", 424 .flags = BOND_OPTFLAG_RAWVAL, 425 .set = bond_option_queue_id_set 426 }, 427 [BOND_OPT_ALL_SLAVES_ACTIVE] = { 428 .id = BOND_OPT_ALL_SLAVES_ACTIVE, 429 .name = "all_slaves_active", 430 .desc = "Keep all frames received on an interface by setting active flag for all slaves", 431 .values = bond_all_slaves_active_tbl, 432 .set = bond_option_all_slaves_active_set 433 }, 434 [BOND_OPT_RESEND_IGMP] = { 435 .id = BOND_OPT_RESEND_IGMP, 436 .name = "resend_igmp", 437 .desc = "Number of IGMP membership reports to send on link failure", 438 .values = bond_resend_igmp_tbl, 439 .set = bond_option_resend_igmp_set 440 }, 441 [BOND_OPT_LP_INTERVAL] = { 442 .id = BOND_OPT_LP_INTERVAL, 443 .name = "lp_interval", 444 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch", 445 .values = bond_lp_interval_tbl, 446 .set = bond_option_lp_interval_set 447 }, 448 [BOND_OPT_SLAVES] = { 449 .id = BOND_OPT_SLAVES, 450 .name = "slaves", 451 .desc = "Slave membership management", 452 .flags = BOND_OPTFLAG_RAWVAL, 453 .set = bond_option_slaves_set 454 }, 455 [BOND_OPT_TLB_DYNAMIC_LB] = { 456 .id = BOND_OPT_TLB_DYNAMIC_LB, 457 .name = "tlb_dynamic_lb", 458 .desc = "Enable dynamic flow shuffling", 459 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB) | BIT(BOND_MODE_ALB)), 460 .values = bond_tlb_dynamic_lb_tbl, 461 .flags = BOND_OPTFLAG_IFDOWN, 462 .set = bond_option_tlb_dynamic_lb_set, 463 }, 464 [BOND_OPT_AD_ACTOR_SYS_PRIO] = { 465 .id = BOND_OPT_AD_ACTOR_SYS_PRIO, 466 .name = "ad_actor_sys_prio", 467 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 468 .values = bond_ad_actor_sys_prio_tbl, 469 .set = bond_option_ad_actor_sys_prio_set, 470 }, 471 [BOND_OPT_AD_ACTOR_SYSTEM] = { 472 .id = BOND_OPT_AD_ACTOR_SYSTEM, 473 .name = "ad_actor_system", 474 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 475 .flags = BOND_OPTFLAG_RAWVAL, 476 .set = bond_option_ad_actor_system_set, 477 }, 478 [BOND_OPT_AD_USER_PORT_KEY] = { 479 .id = BOND_OPT_AD_USER_PORT_KEY, 480 .name = "ad_user_port_key", 481 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 482 .flags = BOND_OPTFLAG_IFDOWN, 483 .values = bond_ad_user_port_key_tbl, 484 .set = bond_option_ad_user_port_key_set, 485 }, 486 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = { 487 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS, 488 .name = "num_grat_arp", 489 .desc = "Number of peer notifications to send on failover event", 490 .values = bond_num_peer_notif_tbl, 491 .set = bond_option_num_peer_notif_set 492 }, 493 [BOND_OPT_PEER_NOTIF_DELAY] = { 494 .id = BOND_OPT_PEER_NOTIF_DELAY, 495 .name = "peer_notif_delay", 496 .desc = "Delay between each peer notification on failover event, in milliseconds", 497 .values = bond_peer_notif_delay_tbl, 498 .set = bond_option_peer_notif_delay_set 499 } 500 }; 501 502 /* Searches for an option by name */ 503 const struct bond_option *bond_opt_get_by_name(const char *name) 504 { 505 const struct bond_option *opt; 506 int option; 507 508 for (option = 0; option < BOND_OPT_LAST; option++) { 509 opt = bond_opt_get(option); 510 if (opt && !strcmp(opt->name, name)) 511 return opt; 512 } 513 514 return NULL; 515 } 516 517 /* Searches for a value in opt's values[] table */ 518 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val) 519 { 520 const struct bond_option *opt; 521 int i; 522 523 opt = bond_opt_get(option); 524 if (WARN_ON(!opt)) 525 return NULL; 526 for (i = 0; opt->values && opt->values[i].string; i++) 527 if (opt->values[i].value == val) 528 return &opt->values[i]; 529 530 return NULL; 531 } 532 533 /* Searches for a value in opt's values[] table which matches the flagmask */ 534 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt, 535 u32 flagmask) 536 { 537 int i; 538 539 for (i = 0; opt->values && opt->values[i].string; i++) 540 if (opt->values[i].flags & flagmask) 541 return &opt->values[i]; 542 543 return NULL; 544 } 545 546 /* If maxval is missing then there's no range to check. In case minval is 547 * missing then it's considered to be 0. 548 */ 549 static bool bond_opt_check_range(const struct bond_option *opt, u64 val) 550 { 551 const struct bond_opt_value *minval, *maxval; 552 553 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 554 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 555 if (!maxval || (minval && val < minval->value) || val > maxval->value) 556 return false; 557 558 return true; 559 } 560 561 /** 562 * bond_opt_parse - parse option value 563 * @opt: the option to parse against 564 * @val: value to parse 565 * 566 * This function tries to extract the value from @val and check if it's 567 * a possible match for the option and returns NULL if a match isn't found, 568 * or the struct_opt_value that matched. It also strips the new line from 569 * @val->string if it's present. 570 */ 571 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, 572 struct bond_opt_value *val) 573 { 574 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, }; 575 const struct bond_opt_value *tbl; 576 const struct bond_opt_value *ret = NULL; 577 bool checkval; 578 int i, rv; 579 580 /* No parsing if the option wants a raw val */ 581 if (opt->flags & BOND_OPTFLAG_RAWVAL) 582 return val; 583 584 tbl = opt->values; 585 if (!tbl) 586 goto out; 587 588 /* ULLONG_MAX is used to bypass string processing */ 589 checkval = val->value != ULLONG_MAX; 590 if (!checkval) { 591 if (!val->string) 592 goto out; 593 p = strchr(val->string, '\n'); 594 if (p) 595 *p = '\0'; 596 for (p = val->string; *p; p++) 597 if (!(isdigit(*p) || isspace(*p))) 598 break; 599 /* The following code extracts the string to match or the value 600 * and sets checkval appropriately 601 */ 602 if (*p) { 603 rv = sscanf(val->string, "%32s", valstr); 604 } else { 605 rv = sscanf(val->string, "%llu", &val->value); 606 checkval = true; 607 } 608 if (!rv) 609 goto out; 610 } 611 612 for (i = 0; tbl[i].string; i++) { 613 /* Check for exact match */ 614 if (checkval) { 615 if (val->value == tbl[i].value) 616 ret = &tbl[i]; 617 } else { 618 if (!strcmp(valstr, "default") && 619 (tbl[i].flags & BOND_VALFLAG_DEFAULT)) 620 ret = &tbl[i]; 621 622 if (!strcmp(valstr, tbl[i].string)) 623 ret = &tbl[i]; 624 } 625 /* Found an exact match */ 626 if (ret) 627 goto out; 628 } 629 /* Possible range match */ 630 if (checkval && bond_opt_check_range(opt, val->value)) 631 ret = val; 632 out: 633 return ret; 634 } 635 636 /* Check opt's dependencies against bond mode and currently set options */ 637 static int bond_opt_check_deps(struct bonding *bond, 638 const struct bond_option *opt) 639 { 640 struct bond_params *params = &bond->params; 641 642 if (test_bit(params->mode, &opt->unsuppmodes)) 643 return -EACCES; 644 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond)) 645 return -ENOTEMPTY; 646 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) 647 return -EBUSY; 648 649 return 0; 650 } 651 652 static void bond_opt_dep_print(struct bonding *bond, 653 const struct bond_option *opt, 654 struct nlattr *bad_attr, 655 struct netlink_ext_ack *extack) 656 { 657 const struct bond_opt_value *modeval; 658 struct bond_params *params; 659 660 params = &bond->params; 661 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); 662 if (test_bit(params->mode, &opt->unsuppmodes)) { 663 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n", 664 opt->name, modeval->string, modeval->value); 665 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 666 "option not supported in mode"); 667 } 668 } 669 670 static void bond_opt_error_interpret(struct bonding *bond, 671 const struct bond_option *opt, 672 int error, const struct bond_opt_value *val, 673 struct nlattr *bad_attr, 674 struct netlink_ext_ack *extack) 675 { 676 const struct bond_opt_value *minval, *maxval; 677 char *p; 678 679 switch (error) { 680 case -EINVAL: 681 NL_SET_ERR_MSG_ATTR(extack, bad_attr, "invalid option value"); 682 if (val) { 683 if (val->string) { 684 /* sometimes RAWVAL opts may have new lines */ 685 p = strchr(val->string, '\n'); 686 if (p) 687 *p = '\0'; 688 netdev_err(bond->dev, "option %s: invalid value (%s)\n", 689 opt->name, val->string); 690 } else { 691 netdev_err(bond->dev, "option %s: invalid value (%llu)\n", 692 opt->name, val->value); 693 } 694 } 695 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 696 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 697 if (!maxval) 698 break; 699 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n", 700 opt->name, minval ? minval->value : 0, maxval->value); 701 break; 702 case -EACCES: 703 bond_opt_dep_print(bond, opt, bad_attr, extack); 704 break; 705 case -ENOTEMPTY: 706 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 707 "unable to set option because the bond device has slaves"); 708 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n", 709 opt->name); 710 break; 711 case -EBUSY: 712 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 713 "unable to set option because the bond is up"); 714 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n", 715 opt->name); 716 break; 717 case -ENODEV: 718 if (val && val->string) { 719 p = strchr(val->string, '\n'); 720 if (p) 721 *p = '\0'; 722 netdev_err(bond->dev, "option %s: interface %s does not exist!\n", 723 opt->name, val->string); 724 NL_SET_ERR_MSG_ATTR(extack, bad_attr, 725 "interface does not exist"); 726 } 727 break; 728 default: 729 break; 730 } 731 } 732 733 /** 734 * __bond_opt_set - set a bonding option 735 * @bond: target bond device 736 * @option: option to set 737 * @val: value to set it to 738 * @bad_attr: netlink attribue that caused the error 739 * @extack: extended netlink error structure, used when an error message 740 * needs to be returned to the caller via netlink 741 * 742 * This function is used to change the bond's option value, it can be 743 * used for both enabling/changing an option and for disabling it. RTNL lock 744 * must be obtained before calling this function. 745 */ 746 int __bond_opt_set(struct bonding *bond, 747 unsigned int option, struct bond_opt_value *val, 748 struct nlattr *bad_attr, struct netlink_ext_ack *extack) 749 { 750 const struct bond_opt_value *retval = NULL; 751 const struct bond_option *opt; 752 int ret = -ENOENT; 753 754 ASSERT_RTNL(); 755 756 opt = bond_opt_get(option); 757 if (WARN_ON(!val) || WARN_ON(!opt)) 758 goto out; 759 ret = bond_opt_check_deps(bond, opt); 760 if (ret) 761 goto out; 762 retval = bond_opt_parse(opt, val); 763 if (!retval) { 764 ret = -EINVAL; 765 goto out; 766 } 767 ret = opt->set(bond, retval); 768 out: 769 if (ret) 770 bond_opt_error_interpret(bond, opt, ret, val, bad_attr, extack); 771 772 return ret; 773 } 774 /** 775 * __bond_opt_set_notify - set a bonding option 776 * @bond: target bond device 777 * @option: option to set 778 * @val: value to set it to 779 * 780 * This function is used to change the bond's option value and trigger 781 * a notification to user sapce. It can be used for both enabling/changing 782 * an option and for disabling it. RTNL lock must be obtained before calling 783 * this function. 784 */ 785 int __bond_opt_set_notify(struct bonding *bond, 786 unsigned int option, struct bond_opt_value *val) 787 { 788 int ret; 789 790 ASSERT_RTNL(); 791 792 ret = __bond_opt_set(bond, option, val, NULL, NULL); 793 794 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED)) 795 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev); 796 797 return ret; 798 } 799 800 /** 801 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set 802 * @bond: target bond device 803 * @option: option to set 804 * @buf: value to set it to 805 * 806 * This function tries to acquire RTNL without blocking and if successful 807 * calls __bond_opt_set. It is mainly used for sysfs option manipulation. 808 */ 809 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) 810 { 811 struct bond_opt_value optval; 812 int ret; 813 814 if (!rtnl_trylock()) 815 return restart_syscall(); 816 bond_opt_initstr(&optval, buf); 817 ret = __bond_opt_set_notify(bond, option, &optval); 818 rtnl_unlock(); 819 820 return ret; 821 } 822 823 /** 824 * bond_opt_get - get a pointer to an option 825 * @option: option for which to return a pointer 826 * 827 * This function checks if option is valid and if so returns a pointer 828 * to its entry in the bond_opts[] option array. 829 */ 830 const struct bond_option *bond_opt_get(unsigned int option) 831 { 832 if (!BOND_OPT_VALID(option)) 833 return NULL; 834 835 return &bond_opts[option]; 836 } 837 838 static bool bond_set_xfrm_features(struct bonding *bond) 839 { 840 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD)) 841 return false; 842 843 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) 844 bond->dev->wanted_features |= BOND_XFRM_FEATURES; 845 else 846 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES; 847 848 return true; 849 } 850 851 static int bond_option_mode_set(struct bonding *bond, 852 const struct bond_opt_value *newval) 853 { 854 if (!bond_mode_uses_arp(newval->value)) { 855 if (bond->params.arp_interval) { 856 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", 857 newval->string); 858 /* disable arp monitoring */ 859 bond->params.arp_interval = 0; 860 } 861 862 if (!bond->params.miimon) { 863 /* set miimon to default value */ 864 bond->params.miimon = BOND_DEFAULT_MIIMON; 865 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", 866 bond->params.miimon); 867 } 868 } 869 870 if (newval->value == BOND_MODE_ALB) 871 bond->params.tlb_dynamic_lb = 1; 872 873 /* don't cache arp_validate between modes */ 874 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 875 bond->params.mode = newval->value; 876 877 if (bond->dev->reg_state == NETREG_REGISTERED) { 878 bool update = false; 879 880 update |= bond_set_xfrm_features(bond); 881 882 if (update) 883 netdev_update_features(bond->dev); 884 } 885 886 bond_xdp_set_features(bond->dev); 887 888 return 0; 889 } 890 891 static int bond_option_active_slave_set(struct bonding *bond, 892 const struct bond_opt_value *newval) 893 { 894 char ifname[IFNAMSIZ] = { 0, }; 895 struct net_device *slave_dev; 896 int ret = 0; 897 898 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ 899 if (!strlen(ifname) || newval->string[0] == '\n') { 900 slave_dev = NULL; 901 } else { 902 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); 903 if (!slave_dev) 904 return -ENODEV; 905 } 906 907 if (slave_dev) { 908 if (!netif_is_bond_slave(slave_dev)) { 909 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n"); 910 return -EINVAL; 911 } 912 913 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { 914 slave_err(bond->dev, slave_dev, "Device is not our slave\n"); 915 return -EINVAL; 916 } 917 } 918 919 block_netpoll_tx(); 920 /* check to see if we are clearing active */ 921 if (!slave_dev) { 922 netdev_dbg(bond->dev, "Clearing current active slave\n"); 923 RCU_INIT_POINTER(bond->curr_active_slave, NULL); 924 bond_select_active_slave(bond); 925 } else { 926 struct slave *old_active = rtnl_dereference(bond->curr_active_slave); 927 struct slave *new_active = bond_slave_get_rtnl(slave_dev); 928 929 BUG_ON(!new_active); 930 931 if (new_active == old_active) { 932 /* do nothing */ 933 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n"); 934 } else { 935 if (old_active && (new_active->link == BOND_LINK_UP) && 936 bond_slave_is_up(new_active)) { 937 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n"); 938 bond_change_active_slave(bond, new_active); 939 } else { 940 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n", 941 new_active->dev->name); 942 ret = -EINVAL; 943 } 944 } 945 } 946 unblock_netpoll_tx(); 947 948 return ret; 949 } 950 951 /* There are two tricky bits here. First, if MII monitoring is activated, then 952 * we must disable ARP monitoring. Second, if the timer isn't running, we must 953 * start it. 954 */ 955 static int bond_option_miimon_set(struct bonding *bond, 956 const struct bond_opt_value *newval) 957 { 958 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n", 959 newval->value); 960 bond->params.miimon = newval->value; 961 if (bond->params.updelay) 962 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", 963 bond->params.updelay * bond->params.miimon); 964 if (bond->params.downdelay) 965 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", 966 bond->params.downdelay * bond->params.miimon); 967 if (bond->params.peer_notif_delay) 968 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n", 969 bond->params.peer_notif_delay * bond->params.miimon); 970 if (newval->value && bond->params.arp_interval) { 971 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n"); 972 bond->params.arp_interval = 0; 973 if (bond->params.arp_validate) 974 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 975 } 976 if (bond->dev->flags & IFF_UP) { 977 /* If the interface is up, we may need to fire off 978 * the MII timer. If the interface is down, the 979 * timer will get fired off when the open function 980 * is called. 981 */ 982 if (!newval->value) { 983 cancel_delayed_work_sync(&bond->mii_work); 984 } else { 985 cancel_delayed_work_sync(&bond->arp_work); 986 queue_delayed_work(bond->wq, &bond->mii_work, 0); 987 } 988 } 989 990 return 0; 991 } 992 993 /* Set up, down and peer notification delays. These must be multiples 994 * of the MII monitoring value, and are stored internally as the 995 * multiplier. Thus, we must translate to MS for the real world. 996 */ 997 static int _bond_option_delay_set(struct bonding *bond, 998 const struct bond_opt_value *newval, 999 const char *name, 1000 int *target) 1001 { 1002 int value = newval->value; 1003 1004 if (!bond->params.miimon) { 1005 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n", 1006 name); 1007 return -EPERM; 1008 } 1009 if ((value % bond->params.miimon) != 0) { 1010 netdev_warn(bond->dev, 1011 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n", 1012 name, 1013 value, bond->params.miimon, 1014 (value / bond->params.miimon) * 1015 bond->params.miimon); 1016 } 1017 *target = value / bond->params.miimon; 1018 netdev_dbg(bond->dev, "Setting %s to %d\n", 1019 name, 1020 *target * bond->params.miimon); 1021 1022 return 0; 1023 } 1024 1025 static int bond_option_updelay_set(struct bonding *bond, 1026 const struct bond_opt_value *newval) 1027 { 1028 return _bond_option_delay_set(bond, newval, "up delay", 1029 &bond->params.updelay); 1030 } 1031 1032 static int bond_option_downdelay_set(struct bonding *bond, 1033 const struct bond_opt_value *newval) 1034 { 1035 return _bond_option_delay_set(bond, newval, "down delay", 1036 &bond->params.downdelay); 1037 } 1038 1039 static int bond_option_peer_notif_delay_set(struct bonding *bond, 1040 const struct bond_opt_value *newval) 1041 { 1042 int ret = _bond_option_delay_set(bond, newval, 1043 "peer notification delay", 1044 &bond->params.peer_notif_delay); 1045 return ret; 1046 } 1047 1048 static int bond_option_use_carrier_set(struct bonding *bond, 1049 const struct bond_opt_value *newval) 1050 { 1051 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n", 1052 newval->value); 1053 bond->params.use_carrier = newval->value; 1054 1055 return 0; 1056 } 1057 1058 /* There are two tricky bits here. First, if ARP monitoring is activated, then 1059 * we must disable MII monitoring. Second, if the ARP timer isn't running, 1060 * we must start it. 1061 */ 1062 static int bond_option_arp_interval_set(struct bonding *bond, 1063 const struct bond_opt_value *newval) 1064 { 1065 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n", 1066 newval->value); 1067 bond->params.arp_interval = newval->value; 1068 if (newval->value) { 1069 if (bond->params.miimon) { 1070 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n"); 1071 bond->params.miimon = 0; 1072 } 1073 if (!bond->params.arp_targets[0]) 1074 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n"); 1075 } 1076 if (bond->dev->flags & IFF_UP) { 1077 /* If the interface is up, we may need to fire off 1078 * the ARP timer. If the interface is down, the 1079 * timer will get fired off when the open function 1080 * is called. 1081 */ 1082 if (!newval->value) { 1083 if (bond->params.arp_validate) 1084 bond->recv_probe = NULL; 1085 cancel_delayed_work_sync(&bond->arp_work); 1086 } else { 1087 /* arp_validate can be set only in active-backup mode */ 1088 bond->recv_probe = bond_rcv_validate; 1089 cancel_delayed_work_sync(&bond->mii_work); 1090 queue_delayed_work(bond->wq, &bond->arp_work, 0); 1091 } 1092 } 1093 1094 return 0; 1095 } 1096 1097 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, 1098 __be32 target, 1099 unsigned long last_rx) 1100 { 1101 __be32 *targets = bond->params.arp_targets; 1102 struct list_head *iter; 1103 struct slave *slave; 1104 1105 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { 1106 bond_for_each_slave(bond, slave, iter) 1107 slave->target_last_arp_rx[slot] = last_rx; 1108 targets[slot] = target; 1109 } 1110 } 1111 1112 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1113 { 1114 __be32 *targets = bond->params.arp_targets; 1115 int ind; 1116 1117 if (!bond_is_ip_target_ok(target)) { 1118 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n", 1119 &target); 1120 return -EINVAL; 1121 } 1122 1123 if (bond_get_targets_ip(targets, target) != -1) { /* dup */ 1124 netdev_err(bond->dev, "ARP target %pI4 is already present\n", 1125 &target); 1126 return -EINVAL; 1127 } 1128 1129 ind = bond_get_targets_ip(targets, 0); /* first free slot */ 1130 if (ind == -1) { 1131 netdev_err(bond->dev, "ARP target table is full!\n"); 1132 return -EINVAL; 1133 } 1134 1135 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target); 1136 1137 _bond_options_arp_ip_target_set(bond, ind, target, jiffies); 1138 1139 return 0; 1140 } 1141 1142 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1143 { 1144 return _bond_option_arp_ip_target_add(bond, target); 1145 } 1146 1147 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) 1148 { 1149 __be32 *targets = bond->params.arp_targets; 1150 struct list_head *iter; 1151 struct slave *slave; 1152 unsigned long *targets_rx; 1153 int ind, i; 1154 1155 if (!bond_is_ip_target_ok(target)) { 1156 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n", 1157 &target); 1158 return -EINVAL; 1159 } 1160 1161 ind = bond_get_targets_ip(targets, target); 1162 if (ind == -1) { 1163 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n", 1164 &target); 1165 return -EINVAL; 1166 } 1167 1168 if (ind == 0 && !targets[1] && bond->params.arp_interval) 1169 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); 1170 1171 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target); 1172 1173 bond_for_each_slave(bond, slave, iter) { 1174 targets_rx = slave->target_last_arp_rx; 1175 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1176 targets_rx[i] = targets_rx[i+1]; 1177 targets_rx[i] = 0; 1178 } 1179 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1180 targets[i] = targets[i+1]; 1181 targets[i] = 0; 1182 1183 return 0; 1184 } 1185 1186 void bond_option_arp_ip_targets_clear(struct bonding *bond) 1187 { 1188 int i; 1189 1190 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 1191 _bond_options_arp_ip_target_set(bond, i, 0, 0); 1192 } 1193 1194 static int bond_option_arp_ip_targets_set(struct bonding *bond, 1195 const struct bond_opt_value *newval) 1196 { 1197 int ret = -EPERM; 1198 __be32 target; 1199 1200 if (newval->string) { 1201 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) { 1202 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n", 1203 &target); 1204 return ret; 1205 } 1206 if (newval->string[0] == '+') 1207 ret = bond_option_arp_ip_target_add(bond, target); 1208 else if (newval->string[0] == '-') 1209 ret = bond_option_arp_ip_target_rem(bond, target); 1210 else 1211 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n"); 1212 } else { 1213 target = newval->value; 1214 ret = bond_option_arp_ip_target_add(bond, target); 1215 } 1216 1217 return ret; 1218 } 1219 1220 #if IS_ENABLED(CONFIG_IPV6) 1221 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot, 1222 struct in6_addr *target, 1223 unsigned long last_rx) 1224 { 1225 struct in6_addr *targets = bond->params.ns_targets; 1226 struct list_head *iter; 1227 struct slave *slave; 1228 1229 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) { 1230 bond_for_each_slave(bond, slave, iter) 1231 slave->target_last_arp_rx[slot] = last_rx; 1232 targets[slot] = *target; 1233 } 1234 } 1235 1236 void bond_option_ns_ip6_targets_clear(struct bonding *bond) 1237 { 1238 struct in6_addr addr_any = in6addr_any; 1239 int i; 1240 1241 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) 1242 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0); 1243 } 1244 1245 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1246 const struct bond_opt_value *newval) 1247 { 1248 struct in6_addr *target = (struct in6_addr *)newval->extra; 1249 struct in6_addr *targets = bond->params.ns_targets; 1250 struct in6_addr addr_any = in6addr_any; 1251 int index; 1252 1253 if (!bond_is_ip6_target_ok(target)) { 1254 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n", 1255 target); 1256 return -EINVAL; 1257 } 1258 1259 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */ 1260 netdev_err(bond->dev, "NS target %pI6c is already present\n", 1261 target); 1262 return -EINVAL; 1263 } 1264 1265 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */ 1266 if (index == -1) { 1267 netdev_err(bond->dev, "NS target table is full!\n"); 1268 return -EINVAL; 1269 } 1270 1271 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target); 1272 1273 _bond_options_ns_ip6_target_set(bond, index, target, jiffies); 1274 1275 return 0; 1276 } 1277 #else 1278 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1279 const struct bond_opt_value *newval) 1280 { 1281 return -EPERM; 1282 } 1283 #endif 1284 1285 static int bond_option_arp_validate_set(struct bonding *bond, 1286 const struct bond_opt_value *newval) 1287 { 1288 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n", 1289 newval->string, newval->value); 1290 bond->params.arp_validate = newval->value; 1291 1292 return 0; 1293 } 1294 1295 static int bond_option_arp_all_targets_set(struct bonding *bond, 1296 const struct bond_opt_value *newval) 1297 { 1298 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n", 1299 newval->string, newval->value); 1300 bond->params.arp_all_targets = newval->value; 1301 1302 return 0; 1303 } 1304 1305 static int bond_option_missed_max_set(struct bonding *bond, 1306 const struct bond_opt_value *newval) 1307 { 1308 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n", 1309 newval->string, newval->value); 1310 bond->params.missed_max = newval->value; 1311 1312 return 0; 1313 } 1314 1315 static int bond_option_prio_set(struct bonding *bond, 1316 const struct bond_opt_value *newval) 1317 { 1318 struct slave *slave; 1319 1320 slave = bond_slave_get_rtnl(newval->slave_dev); 1321 if (!slave) { 1322 netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__); 1323 return -ENODEV; 1324 } 1325 slave->prio = newval->value; 1326 1327 if (rtnl_dereference(bond->primary_slave)) 1328 slave_warn(bond->dev, slave->dev, 1329 "prio updated, but will not affect failover re-selection as primary slave have been set\n"); 1330 else 1331 bond_select_active_slave(bond); 1332 1333 return 0; 1334 } 1335 1336 static int bond_option_primary_set(struct bonding *bond, 1337 const struct bond_opt_value *newval) 1338 { 1339 char *p, *primary = newval->string; 1340 struct list_head *iter; 1341 struct slave *slave; 1342 1343 block_netpoll_tx(); 1344 1345 p = strchr(primary, '\n'); 1346 if (p) 1347 *p = '\0'; 1348 /* check to see if we are clearing primary */ 1349 if (!strlen(primary)) { 1350 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1351 RCU_INIT_POINTER(bond->primary_slave, NULL); 1352 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1353 bond_select_active_slave(bond); 1354 goto out; 1355 } 1356 1357 bond_for_each_slave(bond, slave, iter) { 1358 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1359 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); 1360 rcu_assign_pointer(bond->primary_slave, slave); 1361 strcpy(bond->params.primary, slave->dev->name); 1362 bond->force_primary = true; 1363 bond_select_active_slave(bond); 1364 goto out; 1365 } 1366 } 1367 1368 if (rtnl_dereference(bond->primary_slave)) { 1369 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1370 RCU_INIT_POINTER(bond->primary_slave, NULL); 1371 bond_select_active_slave(bond); 1372 } 1373 strscpy_pad(bond->params.primary, primary, IFNAMSIZ); 1374 1375 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", 1376 primary); 1377 1378 out: 1379 unblock_netpoll_tx(); 1380 1381 return 0; 1382 } 1383 1384 static int bond_option_primary_reselect_set(struct bonding *bond, 1385 const struct bond_opt_value *newval) 1386 { 1387 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", 1388 newval->string, newval->value); 1389 bond->params.primary_reselect = newval->value; 1390 1391 block_netpoll_tx(); 1392 bond_select_active_slave(bond); 1393 unblock_netpoll_tx(); 1394 1395 return 0; 1396 } 1397 1398 static int bond_option_fail_over_mac_set(struct bonding *bond, 1399 const struct bond_opt_value *newval) 1400 { 1401 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", 1402 newval->string, newval->value); 1403 bond->params.fail_over_mac = newval->value; 1404 1405 return 0; 1406 } 1407 1408 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1409 const struct bond_opt_value *newval) 1410 { 1411 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", 1412 newval->string, newval->value); 1413 bond->params.xmit_policy = newval->value; 1414 1415 return 0; 1416 } 1417 1418 static int bond_option_resend_igmp_set(struct bonding *bond, 1419 const struct bond_opt_value *newval) 1420 { 1421 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", 1422 newval->value); 1423 bond->params.resend_igmp = newval->value; 1424 1425 return 0; 1426 } 1427 1428 static int bond_option_num_peer_notif_set(struct bonding *bond, 1429 const struct bond_opt_value *newval) 1430 { 1431 bond->params.num_peer_notif = newval->value; 1432 1433 return 0; 1434 } 1435 1436 static int bond_option_all_slaves_active_set(struct bonding *bond, 1437 const struct bond_opt_value *newval) 1438 { 1439 struct list_head *iter; 1440 struct slave *slave; 1441 1442 if (newval->value == bond->params.all_slaves_active) 1443 return 0; 1444 bond->params.all_slaves_active = newval->value; 1445 bond_for_each_slave(bond, slave, iter) { 1446 if (!bond_is_active_slave(slave)) { 1447 if (newval->value) 1448 slave->inactive = 0; 1449 else 1450 slave->inactive = 1; 1451 } 1452 } 1453 1454 return 0; 1455 } 1456 1457 static int bond_option_min_links_set(struct bonding *bond, 1458 const struct bond_opt_value *newval) 1459 { 1460 netdev_dbg(bond->dev, "Setting min links value to %llu\n", 1461 newval->value); 1462 bond->params.min_links = newval->value; 1463 bond_set_carrier(bond); 1464 1465 return 0; 1466 } 1467 1468 static int bond_option_lp_interval_set(struct bonding *bond, 1469 const struct bond_opt_value *newval) 1470 { 1471 bond->params.lp_interval = newval->value; 1472 1473 return 0; 1474 } 1475 1476 static int bond_option_pps_set(struct bonding *bond, 1477 const struct bond_opt_value *newval) 1478 { 1479 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", 1480 newval->value); 1481 bond->params.packets_per_slave = newval->value; 1482 if (newval->value > 0) { 1483 bond->params.reciprocal_packets_per_slave = 1484 reciprocal_value(newval->value); 1485 } else { 1486 /* reciprocal_packets_per_slave is unused if 1487 * packets_per_slave is 0 or 1, just initialize it 1488 */ 1489 bond->params.reciprocal_packets_per_slave = 1490 (struct reciprocal_value) { 0 }; 1491 } 1492 1493 return 0; 1494 } 1495 1496 static int bond_option_lacp_active_set(struct bonding *bond, 1497 const struct bond_opt_value *newval) 1498 { 1499 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n", 1500 newval->string, newval->value); 1501 bond->params.lacp_active = newval->value; 1502 1503 return 0; 1504 } 1505 1506 static int bond_option_lacp_rate_set(struct bonding *bond, 1507 const struct bond_opt_value *newval) 1508 { 1509 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", 1510 newval->string, newval->value); 1511 bond->params.lacp_fast = newval->value; 1512 bond_3ad_update_lacp_rate(bond); 1513 1514 return 0; 1515 } 1516 1517 static int bond_option_ad_select_set(struct bonding *bond, 1518 const struct bond_opt_value *newval) 1519 { 1520 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", 1521 newval->string, newval->value); 1522 bond->params.ad_select = newval->value; 1523 1524 return 0; 1525 } 1526 1527 static int bond_option_queue_id_set(struct bonding *bond, 1528 const struct bond_opt_value *newval) 1529 { 1530 struct slave *slave, *update_slave; 1531 struct net_device *sdev; 1532 struct list_head *iter; 1533 char *delim; 1534 int ret = 0; 1535 u16 qid; 1536 1537 /* delim will point to queue id if successful */ 1538 delim = strchr(newval->string, ':'); 1539 if (!delim) 1540 goto err_no_cmd; 1541 1542 /* Terminate string that points to device name and bump it 1543 * up one, so we can read the queue id there. 1544 */ 1545 *delim = '\0'; 1546 if (sscanf(++delim, "%hd\n", &qid) != 1) 1547 goto err_no_cmd; 1548 1549 /* Check buffer length, valid ifname and queue id */ 1550 if (!dev_valid_name(newval->string) || 1551 qid > bond->dev->real_num_tx_queues) 1552 goto err_no_cmd; 1553 1554 /* Get the pointer to that interface if it exists */ 1555 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1556 if (!sdev) 1557 goto err_no_cmd; 1558 1559 /* Search for thes slave and check for duplicate qids */ 1560 update_slave = NULL; 1561 bond_for_each_slave(bond, slave, iter) { 1562 if (sdev == slave->dev) 1563 /* We don't need to check the matching 1564 * slave for dups, since we're overwriting it 1565 */ 1566 update_slave = slave; 1567 else if (qid && qid == slave->queue_id) { 1568 goto err_no_cmd; 1569 } 1570 } 1571 1572 if (!update_slave) 1573 goto err_no_cmd; 1574 1575 /* Actually set the qids for the slave */ 1576 update_slave->queue_id = qid; 1577 1578 out: 1579 return ret; 1580 1581 err_no_cmd: 1582 netdev_dbg(bond->dev, "invalid input for queue_id set\n"); 1583 ret = -EPERM; 1584 goto out; 1585 1586 } 1587 1588 static int bond_option_slaves_set(struct bonding *bond, 1589 const struct bond_opt_value *newval) 1590 { 1591 char command[IFNAMSIZ + 1] = { 0, }; 1592 struct net_device *dev; 1593 char *ifname; 1594 int ret; 1595 1596 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1597 ifname = command + 1; 1598 if ((strlen(command) <= 1) || 1599 (command[0] != '+' && command[0] != '-') || 1600 !dev_valid_name(ifname)) 1601 goto err_no_cmd; 1602 1603 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1604 if (!dev) { 1605 netdev_dbg(bond->dev, "interface %s does not exist!\n", 1606 ifname); 1607 ret = -ENODEV; 1608 goto out; 1609 } 1610 1611 switch (command[0]) { 1612 case '+': 1613 slave_dbg(bond->dev, dev, "Enslaving interface\n"); 1614 ret = bond_enslave(bond->dev, dev, NULL); 1615 break; 1616 1617 case '-': 1618 slave_dbg(bond->dev, dev, "Releasing interface\n"); 1619 ret = bond_release(bond->dev, dev); 1620 break; 1621 1622 default: 1623 /* should not run here. */ 1624 goto err_no_cmd; 1625 } 1626 1627 out: 1628 return ret; 1629 1630 err_no_cmd: 1631 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); 1632 ret = -EPERM; 1633 goto out; 1634 } 1635 1636 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1637 const struct bond_opt_value *newval) 1638 { 1639 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", 1640 newval->string, newval->value); 1641 bond->params.tlb_dynamic_lb = newval->value; 1642 1643 return 0; 1644 } 1645 1646 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 1647 const struct bond_opt_value *newval) 1648 { 1649 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", 1650 newval->value); 1651 1652 bond->params.ad_actor_sys_prio = newval->value; 1653 bond_3ad_update_ad_actor_settings(bond); 1654 1655 return 0; 1656 } 1657 1658 static int bond_option_ad_actor_system_set(struct bonding *bond, 1659 const struct bond_opt_value *newval) 1660 { 1661 u8 macaddr[ETH_ALEN]; 1662 u8 *mac; 1663 1664 if (newval->string) { 1665 if (!mac_pton(newval->string, macaddr)) 1666 goto err; 1667 mac = macaddr; 1668 } else { 1669 mac = (u8 *)&newval->value; 1670 } 1671 1672 if (is_multicast_ether_addr(mac)) 1673 goto err; 1674 1675 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); 1676 ether_addr_copy(bond->params.ad_actor_system, mac); 1677 bond_3ad_update_ad_actor_settings(bond); 1678 1679 return 0; 1680 1681 err: 1682 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); 1683 return -EINVAL; 1684 } 1685 1686 static int bond_option_ad_user_port_key_set(struct bonding *bond, 1687 const struct bond_opt_value *newval) 1688 { 1689 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", 1690 newval->value); 1691 1692 bond->params.ad_user_port_key = newval->value; 1693 return 0; 1694 } 1695