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