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