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 { 637 const struct bond_opt_value *modeval; 638 struct bond_params *params; 639 640 params = &bond->params; 641 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); 642 if (test_bit(params->mode, &opt->unsuppmodes)) 643 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n", 644 opt->name, modeval->string, modeval->value); 645 } 646 647 static void bond_opt_error_interpret(struct bonding *bond, 648 const struct bond_option *opt, 649 int error, const struct bond_opt_value *val) 650 { 651 const struct bond_opt_value *minval, *maxval; 652 char *p; 653 654 switch (error) { 655 case -EINVAL: 656 if (val) { 657 if (val->string) { 658 /* sometimes RAWVAL opts may have new lines */ 659 p = strchr(val->string, '\n'); 660 if (p) 661 *p = '\0'; 662 netdev_err(bond->dev, "option %s: invalid value (%s)\n", 663 opt->name, val->string); 664 } else { 665 netdev_err(bond->dev, "option %s: invalid value (%llu)\n", 666 opt->name, val->value); 667 } 668 } 669 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 670 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 671 if (!maxval) 672 break; 673 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n", 674 opt->name, minval ? minval->value : 0, maxval->value); 675 break; 676 case -EACCES: 677 bond_opt_dep_print(bond, opt); 678 break; 679 case -ENOTEMPTY: 680 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n", 681 opt->name); 682 break; 683 case -EBUSY: 684 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n", 685 opt->name); 686 break; 687 case -ENODEV: 688 if (val && val->string) { 689 p = strchr(val->string, '\n'); 690 if (p) 691 *p = '\0'; 692 netdev_err(bond->dev, "option %s: interface %s does not exist!\n", 693 opt->name, val->string); 694 } 695 break; 696 default: 697 break; 698 } 699 } 700 701 /** 702 * __bond_opt_set - set a bonding option 703 * @bond: target bond device 704 * @option: option to set 705 * @val: value to set it to 706 * 707 * This function is used to change the bond's option value, it can be 708 * used for both enabling/changing an option and for disabling it. RTNL lock 709 * must be obtained before calling this function. 710 */ 711 int __bond_opt_set(struct bonding *bond, 712 unsigned int option, struct bond_opt_value *val) 713 { 714 const struct bond_opt_value *retval = NULL; 715 const struct bond_option *opt; 716 int ret = -ENOENT; 717 718 ASSERT_RTNL(); 719 720 opt = bond_opt_get(option); 721 if (WARN_ON(!val) || WARN_ON(!opt)) 722 goto out; 723 ret = bond_opt_check_deps(bond, opt); 724 if (ret) 725 goto out; 726 retval = bond_opt_parse(opt, val); 727 if (!retval) { 728 ret = -EINVAL; 729 goto out; 730 } 731 ret = opt->set(bond, retval); 732 out: 733 if (ret) 734 bond_opt_error_interpret(bond, opt, ret, val); 735 736 return ret; 737 } 738 /** 739 * __bond_opt_set_notify - set a bonding option 740 * @bond: target bond device 741 * @option: option to set 742 * @val: value to set it to 743 * 744 * This function is used to change the bond's option value and trigger 745 * a notification to user sapce. It can be used for both enabling/changing 746 * an option and for disabling it. RTNL lock must be obtained before calling 747 * this function. 748 */ 749 int __bond_opt_set_notify(struct bonding *bond, 750 unsigned int option, struct bond_opt_value *val) 751 { 752 int ret; 753 754 ASSERT_RTNL(); 755 756 ret = __bond_opt_set(bond, option, val); 757 758 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED)) 759 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev); 760 761 return ret; 762 } 763 764 /** 765 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set 766 * @bond: target bond device 767 * @option: option to set 768 * @buf: value to set it to 769 * 770 * This function tries to acquire RTNL without blocking and if successful 771 * calls __bond_opt_set. It is mainly used for sysfs option manipulation. 772 */ 773 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) 774 { 775 struct bond_opt_value optval; 776 int ret; 777 778 if (!rtnl_trylock()) 779 return restart_syscall(); 780 bond_opt_initstr(&optval, buf); 781 ret = __bond_opt_set_notify(bond, option, &optval); 782 rtnl_unlock(); 783 784 return ret; 785 } 786 787 /** 788 * bond_opt_get - get a pointer to an option 789 * @option: option for which to return a pointer 790 * 791 * This function checks if option is valid and if so returns a pointer 792 * to its entry in the bond_opts[] option array. 793 */ 794 const struct bond_option *bond_opt_get(unsigned int option) 795 { 796 if (!BOND_OPT_VALID(option)) 797 return NULL; 798 799 return &bond_opts[option]; 800 } 801 802 static bool bond_set_xfrm_features(struct bonding *bond) 803 { 804 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD)) 805 return false; 806 807 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) 808 bond->dev->wanted_features |= BOND_XFRM_FEATURES; 809 else 810 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES; 811 812 return true; 813 } 814 815 static bool bond_set_tls_features(struct bonding *bond) 816 { 817 if (!IS_ENABLED(CONFIG_TLS_DEVICE)) 818 return false; 819 820 if (bond_sk_check(bond)) 821 bond->dev->wanted_features |= BOND_TLS_FEATURES; 822 else 823 bond->dev->wanted_features &= ~BOND_TLS_FEATURES; 824 825 return true; 826 } 827 828 static int bond_option_mode_set(struct bonding *bond, 829 const struct bond_opt_value *newval) 830 { 831 if (!bond_mode_uses_arp(newval->value)) { 832 if (bond->params.arp_interval) { 833 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", 834 newval->string); 835 /* disable arp monitoring */ 836 bond->params.arp_interval = 0; 837 } 838 839 if (!bond->params.miimon) { 840 /* set miimon to default value */ 841 bond->params.miimon = BOND_DEFAULT_MIIMON; 842 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", 843 bond->params.miimon); 844 } 845 } 846 847 if (newval->value == BOND_MODE_ALB) 848 bond->params.tlb_dynamic_lb = 1; 849 850 /* don't cache arp_validate between modes */ 851 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 852 bond->params.mode = newval->value; 853 854 if (bond->dev->reg_state == NETREG_REGISTERED) { 855 bool update = false; 856 857 update |= bond_set_xfrm_features(bond); 858 update |= bond_set_tls_features(bond); 859 860 if (update) 861 netdev_update_features(bond->dev); 862 } 863 864 return 0; 865 } 866 867 static int bond_option_active_slave_set(struct bonding *bond, 868 const struct bond_opt_value *newval) 869 { 870 char ifname[IFNAMSIZ] = { 0, }; 871 struct net_device *slave_dev; 872 int ret = 0; 873 874 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ 875 if (!strlen(ifname) || newval->string[0] == '\n') { 876 slave_dev = NULL; 877 } else { 878 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); 879 if (!slave_dev) 880 return -ENODEV; 881 } 882 883 if (slave_dev) { 884 if (!netif_is_bond_slave(slave_dev)) { 885 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n"); 886 return -EINVAL; 887 } 888 889 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { 890 slave_err(bond->dev, slave_dev, "Device is not our slave\n"); 891 return -EINVAL; 892 } 893 } 894 895 block_netpoll_tx(); 896 /* check to see if we are clearing active */ 897 if (!slave_dev) { 898 netdev_dbg(bond->dev, "Clearing current active slave\n"); 899 RCU_INIT_POINTER(bond->curr_active_slave, NULL); 900 bond_select_active_slave(bond); 901 } else { 902 struct slave *old_active = rtnl_dereference(bond->curr_active_slave); 903 struct slave *new_active = bond_slave_get_rtnl(slave_dev); 904 905 BUG_ON(!new_active); 906 907 if (new_active == old_active) { 908 /* do nothing */ 909 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n"); 910 } else { 911 if (old_active && (new_active->link == BOND_LINK_UP) && 912 bond_slave_is_up(new_active)) { 913 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n"); 914 bond_change_active_slave(bond, new_active); 915 } else { 916 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n", 917 new_active->dev->name); 918 ret = -EINVAL; 919 } 920 } 921 } 922 unblock_netpoll_tx(); 923 924 return ret; 925 } 926 927 /* There are two tricky bits here. First, if MII monitoring is activated, then 928 * we must disable ARP monitoring. Second, if the timer isn't running, we must 929 * start it. 930 */ 931 static int bond_option_miimon_set(struct bonding *bond, 932 const struct bond_opt_value *newval) 933 { 934 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n", 935 newval->value); 936 bond->params.miimon = newval->value; 937 if (bond->params.updelay) 938 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", 939 bond->params.updelay * bond->params.miimon); 940 if (bond->params.downdelay) 941 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", 942 bond->params.downdelay * bond->params.miimon); 943 if (bond->params.peer_notif_delay) 944 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n", 945 bond->params.peer_notif_delay * bond->params.miimon); 946 if (newval->value && bond->params.arp_interval) { 947 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n"); 948 bond->params.arp_interval = 0; 949 if (bond->params.arp_validate) 950 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 951 } 952 if (bond->dev->flags & IFF_UP) { 953 /* If the interface is up, we may need to fire off 954 * the MII timer. If the interface is down, the 955 * timer will get fired off when the open function 956 * is called. 957 */ 958 if (!newval->value) { 959 cancel_delayed_work_sync(&bond->mii_work); 960 } else { 961 cancel_delayed_work_sync(&bond->arp_work); 962 queue_delayed_work(bond->wq, &bond->mii_work, 0); 963 } 964 } 965 966 return 0; 967 } 968 969 /* Set up, down and peer notification delays. These must be multiples 970 * of the MII monitoring value, and are stored internally as the 971 * multiplier. Thus, we must translate to MS for the real world. 972 */ 973 static int _bond_option_delay_set(struct bonding *bond, 974 const struct bond_opt_value *newval, 975 const char *name, 976 int *target) 977 { 978 int value = newval->value; 979 980 if (!bond->params.miimon) { 981 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n", 982 name); 983 return -EPERM; 984 } 985 if ((value % bond->params.miimon) != 0) { 986 netdev_warn(bond->dev, 987 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n", 988 name, 989 value, bond->params.miimon, 990 (value / bond->params.miimon) * 991 bond->params.miimon); 992 } 993 *target = value / bond->params.miimon; 994 netdev_dbg(bond->dev, "Setting %s to %d\n", 995 name, 996 *target * bond->params.miimon); 997 998 return 0; 999 } 1000 1001 static int bond_option_updelay_set(struct bonding *bond, 1002 const struct bond_opt_value *newval) 1003 { 1004 return _bond_option_delay_set(bond, newval, "up delay", 1005 &bond->params.updelay); 1006 } 1007 1008 static int bond_option_downdelay_set(struct bonding *bond, 1009 const struct bond_opt_value *newval) 1010 { 1011 return _bond_option_delay_set(bond, newval, "down delay", 1012 &bond->params.downdelay); 1013 } 1014 1015 static int bond_option_peer_notif_delay_set(struct bonding *bond, 1016 const struct bond_opt_value *newval) 1017 { 1018 int ret = _bond_option_delay_set(bond, newval, 1019 "peer notification delay", 1020 &bond->params.peer_notif_delay); 1021 return ret; 1022 } 1023 1024 static int bond_option_use_carrier_set(struct bonding *bond, 1025 const struct bond_opt_value *newval) 1026 { 1027 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n", 1028 newval->value); 1029 bond->params.use_carrier = newval->value; 1030 1031 return 0; 1032 } 1033 1034 /* There are two tricky bits here. First, if ARP monitoring is activated, then 1035 * we must disable MII monitoring. Second, if the ARP timer isn't running, 1036 * we must start it. 1037 */ 1038 static int bond_option_arp_interval_set(struct bonding *bond, 1039 const struct bond_opt_value *newval) 1040 { 1041 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n", 1042 newval->value); 1043 bond->params.arp_interval = newval->value; 1044 if (newval->value) { 1045 if (bond->params.miimon) { 1046 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n"); 1047 bond->params.miimon = 0; 1048 } 1049 if (!bond->params.arp_targets[0]) 1050 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n"); 1051 } 1052 if (bond->dev->flags & IFF_UP) { 1053 /* If the interface is up, we may need to fire off 1054 * the ARP timer. If the interface is down, the 1055 * timer will get fired off when the open function 1056 * is called. 1057 */ 1058 if (!newval->value) { 1059 if (bond->params.arp_validate) 1060 bond->recv_probe = NULL; 1061 cancel_delayed_work_sync(&bond->arp_work); 1062 } else { 1063 /* arp_validate can be set only in active-backup mode */ 1064 bond->recv_probe = bond_rcv_validate; 1065 cancel_delayed_work_sync(&bond->mii_work); 1066 queue_delayed_work(bond->wq, &bond->arp_work, 0); 1067 } 1068 } 1069 1070 return 0; 1071 } 1072 1073 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, 1074 __be32 target, 1075 unsigned long last_rx) 1076 { 1077 __be32 *targets = bond->params.arp_targets; 1078 struct list_head *iter; 1079 struct slave *slave; 1080 1081 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { 1082 bond_for_each_slave(bond, slave, iter) 1083 slave->target_last_arp_rx[slot] = last_rx; 1084 targets[slot] = target; 1085 } 1086 } 1087 1088 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1089 { 1090 __be32 *targets = bond->params.arp_targets; 1091 int ind; 1092 1093 if (!bond_is_ip_target_ok(target)) { 1094 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n", 1095 &target); 1096 return -EINVAL; 1097 } 1098 1099 if (bond_get_targets_ip(targets, target) != -1) { /* dup */ 1100 netdev_err(bond->dev, "ARP target %pI4 is already present\n", 1101 &target); 1102 return -EINVAL; 1103 } 1104 1105 ind = bond_get_targets_ip(targets, 0); /* first free slot */ 1106 if (ind == -1) { 1107 netdev_err(bond->dev, "ARP target table is full!\n"); 1108 return -EINVAL; 1109 } 1110 1111 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target); 1112 1113 _bond_options_arp_ip_target_set(bond, ind, target, jiffies); 1114 1115 return 0; 1116 } 1117 1118 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1119 { 1120 return _bond_option_arp_ip_target_add(bond, target); 1121 } 1122 1123 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) 1124 { 1125 __be32 *targets = bond->params.arp_targets; 1126 struct list_head *iter; 1127 struct slave *slave; 1128 unsigned long *targets_rx; 1129 int ind, i; 1130 1131 if (!bond_is_ip_target_ok(target)) { 1132 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n", 1133 &target); 1134 return -EINVAL; 1135 } 1136 1137 ind = bond_get_targets_ip(targets, target); 1138 if (ind == -1) { 1139 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n", 1140 &target); 1141 return -EINVAL; 1142 } 1143 1144 if (ind == 0 && !targets[1] && bond->params.arp_interval) 1145 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); 1146 1147 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target); 1148 1149 bond_for_each_slave(bond, slave, iter) { 1150 targets_rx = slave->target_last_arp_rx; 1151 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1152 targets_rx[i] = targets_rx[i+1]; 1153 targets_rx[i] = 0; 1154 } 1155 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1156 targets[i] = targets[i+1]; 1157 targets[i] = 0; 1158 1159 return 0; 1160 } 1161 1162 void bond_option_arp_ip_targets_clear(struct bonding *bond) 1163 { 1164 int i; 1165 1166 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 1167 _bond_options_arp_ip_target_set(bond, i, 0, 0); 1168 } 1169 1170 static int bond_option_arp_ip_targets_set(struct bonding *bond, 1171 const struct bond_opt_value *newval) 1172 { 1173 int ret = -EPERM; 1174 __be32 target; 1175 1176 if (newval->string) { 1177 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) { 1178 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n", 1179 &target); 1180 return ret; 1181 } 1182 if (newval->string[0] == '+') 1183 ret = bond_option_arp_ip_target_add(bond, target); 1184 else if (newval->string[0] == '-') 1185 ret = bond_option_arp_ip_target_rem(bond, target); 1186 else 1187 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n"); 1188 } else { 1189 target = newval->value; 1190 ret = bond_option_arp_ip_target_add(bond, target); 1191 } 1192 1193 return ret; 1194 } 1195 1196 #if IS_ENABLED(CONFIG_IPV6) 1197 static void _bond_options_ns_ip6_target_set(struct bonding *bond, int slot, 1198 struct in6_addr *target, 1199 unsigned long last_rx) 1200 { 1201 struct in6_addr *targets = bond->params.ns_targets; 1202 struct list_head *iter; 1203 struct slave *slave; 1204 1205 if (slot >= 0 && slot < BOND_MAX_NS_TARGETS) { 1206 bond_for_each_slave(bond, slave, iter) 1207 slave->target_last_arp_rx[slot] = last_rx; 1208 targets[slot] = *target; 1209 } 1210 } 1211 1212 void bond_option_ns_ip6_targets_clear(struct bonding *bond) 1213 { 1214 struct in6_addr addr_any = in6addr_any; 1215 int i; 1216 1217 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) 1218 _bond_options_ns_ip6_target_set(bond, i, &addr_any, 0); 1219 } 1220 1221 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1222 const struct bond_opt_value *newval) 1223 { 1224 struct in6_addr *target = (struct in6_addr *)newval->extra; 1225 struct in6_addr *targets = bond->params.ns_targets; 1226 struct in6_addr addr_any = in6addr_any; 1227 int index; 1228 1229 if (!bond_is_ip6_target_ok(target)) { 1230 netdev_err(bond->dev, "invalid NS target %pI6c specified for addition\n", 1231 target); 1232 return -EINVAL; 1233 } 1234 1235 if (bond_get_targets_ip6(targets, target) != -1) { /* dup */ 1236 netdev_err(bond->dev, "NS target %pI6c is already present\n", 1237 target); 1238 return -EINVAL; 1239 } 1240 1241 index = bond_get_targets_ip6(targets, &addr_any); /* first free slot */ 1242 if (index == -1) { 1243 netdev_err(bond->dev, "NS target table is full!\n"); 1244 return -EINVAL; 1245 } 1246 1247 netdev_dbg(bond->dev, "Adding NS target %pI6c\n", target); 1248 1249 _bond_options_ns_ip6_target_set(bond, index, target, jiffies); 1250 1251 return 0; 1252 } 1253 #else 1254 static int bond_option_ns_ip6_targets_set(struct bonding *bond, 1255 const struct bond_opt_value *newval) 1256 { 1257 return -EPERM; 1258 } 1259 #endif 1260 1261 static int bond_option_arp_validate_set(struct bonding *bond, 1262 const struct bond_opt_value *newval) 1263 { 1264 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n", 1265 newval->string, newval->value); 1266 bond->params.arp_validate = newval->value; 1267 1268 return 0; 1269 } 1270 1271 static int bond_option_arp_all_targets_set(struct bonding *bond, 1272 const struct bond_opt_value *newval) 1273 { 1274 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n", 1275 newval->string, newval->value); 1276 bond->params.arp_all_targets = newval->value; 1277 1278 return 0; 1279 } 1280 1281 static int bond_option_missed_max_set(struct bonding *bond, 1282 const struct bond_opt_value *newval) 1283 { 1284 netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n", 1285 newval->string, newval->value); 1286 bond->params.missed_max = newval->value; 1287 1288 return 0; 1289 } 1290 1291 static int bond_option_primary_set(struct bonding *bond, 1292 const struct bond_opt_value *newval) 1293 { 1294 char *p, *primary = newval->string; 1295 struct list_head *iter; 1296 struct slave *slave; 1297 1298 block_netpoll_tx(); 1299 1300 p = strchr(primary, '\n'); 1301 if (p) 1302 *p = '\0'; 1303 /* check to see if we are clearing primary */ 1304 if (!strlen(primary)) { 1305 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1306 RCU_INIT_POINTER(bond->primary_slave, NULL); 1307 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1308 bond_select_active_slave(bond); 1309 goto out; 1310 } 1311 1312 bond_for_each_slave(bond, slave, iter) { 1313 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1314 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); 1315 rcu_assign_pointer(bond->primary_slave, slave); 1316 strcpy(bond->params.primary, slave->dev->name); 1317 bond->force_primary = true; 1318 bond_select_active_slave(bond); 1319 goto out; 1320 } 1321 } 1322 1323 if (rtnl_dereference(bond->primary_slave)) { 1324 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1325 RCU_INIT_POINTER(bond->primary_slave, NULL); 1326 bond_select_active_slave(bond); 1327 } 1328 strscpy_pad(bond->params.primary, primary, IFNAMSIZ); 1329 1330 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", 1331 primary); 1332 1333 out: 1334 unblock_netpoll_tx(); 1335 1336 return 0; 1337 } 1338 1339 static int bond_option_primary_reselect_set(struct bonding *bond, 1340 const struct bond_opt_value *newval) 1341 { 1342 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", 1343 newval->string, newval->value); 1344 bond->params.primary_reselect = newval->value; 1345 1346 block_netpoll_tx(); 1347 bond_select_active_slave(bond); 1348 unblock_netpoll_tx(); 1349 1350 return 0; 1351 } 1352 1353 static int bond_option_fail_over_mac_set(struct bonding *bond, 1354 const struct bond_opt_value *newval) 1355 { 1356 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", 1357 newval->string, newval->value); 1358 bond->params.fail_over_mac = newval->value; 1359 1360 return 0; 1361 } 1362 1363 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1364 const struct bond_opt_value *newval) 1365 { 1366 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", 1367 newval->string, newval->value); 1368 bond->params.xmit_policy = newval->value; 1369 1370 if (bond->dev->reg_state == NETREG_REGISTERED) 1371 if (bond_set_tls_features(bond)) 1372 netdev_update_features(bond->dev); 1373 1374 return 0; 1375 } 1376 1377 static int bond_option_resend_igmp_set(struct bonding *bond, 1378 const struct bond_opt_value *newval) 1379 { 1380 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", 1381 newval->value); 1382 bond->params.resend_igmp = newval->value; 1383 1384 return 0; 1385 } 1386 1387 static int bond_option_num_peer_notif_set(struct bonding *bond, 1388 const struct bond_opt_value *newval) 1389 { 1390 bond->params.num_peer_notif = newval->value; 1391 1392 return 0; 1393 } 1394 1395 static int bond_option_all_slaves_active_set(struct bonding *bond, 1396 const struct bond_opt_value *newval) 1397 { 1398 struct list_head *iter; 1399 struct slave *slave; 1400 1401 if (newval->value == bond->params.all_slaves_active) 1402 return 0; 1403 bond->params.all_slaves_active = newval->value; 1404 bond_for_each_slave(bond, slave, iter) { 1405 if (!bond_is_active_slave(slave)) { 1406 if (newval->value) 1407 slave->inactive = 0; 1408 else 1409 slave->inactive = 1; 1410 } 1411 } 1412 1413 return 0; 1414 } 1415 1416 static int bond_option_min_links_set(struct bonding *bond, 1417 const struct bond_opt_value *newval) 1418 { 1419 netdev_dbg(bond->dev, "Setting min links value to %llu\n", 1420 newval->value); 1421 bond->params.min_links = newval->value; 1422 bond_set_carrier(bond); 1423 1424 return 0; 1425 } 1426 1427 static int bond_option_lp_interval_set(struct bonding *bond, 1428 const struct bond_opt_value *newval) 1429 { 1430 bond->params.lp_interval = newval->value; 1431 1432 return 0; 1433 } 1434 1435 static int bond_option_pps_set(struct bonding *bond, 1436 const struct bond_opt_value *newval) 1437 { 1438 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", 1439 newval->value); 1440 bond->params.packets_per_slave = newval->value; 1441 if (newval->value > 0) { 1442 bond->params.reciprocal_packets_per_slave = 1443 reciprocal_value(newval->value); 1444 } else { 1445 /* reciprocal_packets_per_slave is unused if 1446 * packets_per_slave is 0 or 1, just initialize it 1447 */ 1448 bond->params.reciprocal_packets_per_slave = 1449 (struct reciprocal_value) { 0 }; 1450 } 1451 1452 return 0; 1453 } 1454 1455 static int bond_option_lacp_active_set(struct bonding *bond, 1456 const struct bond_opt_value *newval) 1457 { 1458 netdev_dbg(bond->dev, "Setting LACP active to %s (%llu)\n", 1459 newval->string, newval->value); 1460 bond->params.lacp_active = newval->value; 1461 1462 return 0; 1463 } 1464 1465 static int bond_option_lacp_rate_set(struct bonding *bond, 1466 const struct bond_opt_value *newval) 1467 { 1468 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", 1469 newval->string, newval->value); 1470 bond->params.lacp_fast = newval->value; 1471 bond_3ad_update_lacp_rate(bond); 1472 1473 return 0; 1474 } 1475 1476 static int bond_option_ad_select_set(struct bonding *bond, 1477 const struct bond_opt_value *newval) 1478 { 1479 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", 1480 newval->string, newval->value); 1481 bond->params.ad_select = newval->value; 1482 1483 return 0; 1484 } 1485 1486 static int bond_option_queue_id_set(struct bonding *bond, 1487 const struct bond_opt_value *newval) 1488 { 1489 struct slave *slave, *update_slave; 1490 struct net_device *sdev; 1491 struct list_head *iter; 1492 char *delim; 1493 int ret = 0; 1494 u16 qid; 1495 1496 /* delim will point to queue id if successful */ 1497 delim = strchr(newval->string, ':'); 1498 if (!delim) 1499 goto err_no_cmd; 1500 1501 /* Terminate string that points to device name and bump it 1502 * up one, so we can read the queue id there. 1503 */ 1504 *delim = '\0'; 1505 if (sscanf(++delim, "%hd\n", &qid) != 1) 1506 goto err_no_cmd; 1507 1508 /* Check buffer length, valid ifname and queue id */ 1509 if (!dev_valid_name(newval->string) || 1510 qid > bond->dev->real_num_tx_queues) 1511 goto err_no_cmd; 1512 1513 /* Get the pointer to that interface if it exists */ 1514 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1515 if (!sdev) 1516 goto err_no_cmd; 1517 1518 /* Search for thes slave and check for duplicate qids */ 1519 update_slave = NULL; 1520 bond_for_each_slave(bond, slave, iter) { 1521 if (sdev == slave->dev) 1522 /* We don't need to check the matching 1523 * slave for dups, since we're overwriting it 1524 */ 1525 update_slave = slave; 1526 else if (qid && qid == slave->queue_id) { 1527 goto err_no_cmd; 1528 } 1529 } 1530 1531 if (!update_slave) 1532 goto err_no_cmd; 1533 1534 /* Actually set the qids for the slave */ 1535 update_slave->queue_id = qid; 1536 1537 out: 1538 return ret; 1539 1540 err_no_cmd: 1541 netdev_dbg(bond->dev, "invalid input for queue_id set\n"); 1542 ret = -EPERM; 1543 goto out; 1544 1545 } 1546 1547 static int bond_option_slaves_set(struct bonding *bond, 1548 const struct bond_opt_value *newval) 1549 { 1550 char command[IFNAMSIZ + 1] = { 0, }; 1551 struct net_device *dev; 1552 char *ifname; 1553 int ret; 1554 1555 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1556 ifname = command + 1; 1557 if ((strlen(command) <= 1) || 1558 (command[0] != '+' && command[0] != '-') || 1559 !dev_valid_name(ifname)) 1560 goto err_no_cmd; 1561 1562 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1563 if (!dev) { 1564 netdev_dbg(bond->dev, "interface %s does not exist!\n", 1565 ifname); 1566 ret = -ENODEV; 1567 goto out; 1568 } 1569 1570 switch (command[0]) { 1571 case '+': 1572 slave_dbg(bond->dev, dev, "Enslaving interface\n"); 1573 ret = bond_enslave(bond->dev, dev, NULL); 1574 break; 1575 1576 case '-': 1577 slave_dbg(bond->dev, dev, "Releasing interface\n"); 1578 ret = bond_release(bond->dev, dev); 1579 break; 1580 1581 default: 1582 /* should not run here. */ 1583 goto err_no_cmd; 1584 } 1585 1586 out: 1587 return ret; 1588 1589 err_no_cmd: 1590 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); 1591 ret = -EPERM; 1592 goto out; 1593 } 1594 1595 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1596 const struct bond_opt_value *newval) 1597 { 1598 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", 1599 newval->string, newval->value); 1600 bond->params.tlb_dynamic_lb = newval->value; 1601 1602 return 0; 1603 } 1604 1605 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 1606 const struct bond_opt_value *newval) 1607 { 1608 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", 1609 newval->value); 1610 1611 bond->params.ad_actor_sys_prio = newval->value; 1612 bond_3ad_update_ad_actor_settings(bond); 1613 1614 return 0; 1615 } 1616 1617 static int bond_option_ad_actor_system_set(struct bonding *bond, 1618 const struct bond_opt_value *newval) 1619 { 1620 u8 macaddr[ETH_ALEN]; 1621 u8 *mac; 1622 1623 if (newval->string) { 1624 if (!mac_pton(newval->string, macaddr)) 1625 goto err; 1626 mac = macaddr; 1627 } else { 1628 mac = (u8 *)&newval->value; 1629 } 1630 1631 if (is_multicast_ether_addr(mac)) 1632 goto err; 1633 1634 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); 1635 ether_addr_copy(bond->params.ad_actor_system, mac); 1636 bond_3ad_update_ad_actor_settings(bond); 1637 1638 return 0; 1639 1640 err: 1641 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); 1642 return -EINVAL; 1643 } 1644 1645 static int bond_option_ad_user_port_key_set(struct bonding *bond, 1646 const struct bond_opt_value *newval) 1647 { 1648 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", 1649 newval->value); 1650 1651 bond->params.ad_user_port_key = newval->value; 1652 return 0; 1653 } 1654