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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 13 14 #include <linux/errno.h> 15 #include <linux/if.h> 16 #include <linux/netdevice.h> 17 #include <linux/spinlock.h> 18 #include <linux/rcupdate.h> 19 #include <linux/ctype.h> 20 #include <linux/inet.h> 21 #include "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 76 77 static const struct bond_opt_value bond_mode_tbl[] = { 78 { "balance-rr", BOND_MODE_ROUNDROBIN, BOND_VALFLAG_DEFAULT}, 79 { "active-backup", BOND_MODE_ACTIVEBACKUP, 0}, 80 { "balance-xor", BOND_MODE_XOR, 0}, 81 { "broadcast", BOND_MODE_BROADCAST, 0}, 82 { "802.3ad", BOND_MODE_8023AD, 0}, 83 { "balance-tlb", BOND_MODE_TLB, 0}, 84 { "balance-alb", BOND_MODE_ALB, 0}, 85 { NULL, -1, 0}, 86 }; 87 88 static const struct bond_opt_value bond_pps_tbl[] = { 89 { "default", 1, BOND_VALFLAG_DEFAULT}, 90 { "maxval", USHRT_MAX, BOND_VALFLAG_MAX}, 91 { NULL, -1, 0}, 92 }; 93 94 static const struct bond_opt_value bond_xmit_hashtype_tbl[] = { 95 { "layer2", BOND_XMIT_POLICY_LAYER2, BOND_VALFLAG_DEFAULT}, 96 { "layer3+4", BOND_XMIT_POLICY_LAYER34, 0}, 97 { "layer2+3", BOND_XMIT_POLICY_LAYER23, 0}, 98 { "encap2+3", BOND_XMIT_POLICY_ENCAP23, 0}, 99 { "encap3+4", BOND_XMIT_POLICY_ENCAP34, 0}, 100 { NULL, -1, 0}, 101 }; 102 103 static const struct bond_opt_value bond_arp_validate_tbl[] = { 104 { "none", BOND_ARP_VALIDATE_NONE, BOND_VALFLAG_DEFAULT}, 105 { "active", BOND_ARP_VALIDATE_ACTIVE, 0}, 106 { "backup", BOND_ARP_VALIDATE_BACKUP, 0}, 107 { "all", BOND_ARP_VALIDATE_ALL, 0}, 108 { "filter", BOND_ARP_FILTER, 0}, 109 { "filter_active", BOND_ARP_FILTER_ACTIVE, 0}, 110 { "filter_backup", BOND_ARP_FILTER_BACKUP, 0}, 111 { NULL, -1, 0}, 112 }; 113 114 static const struct bond_opt_value bond_arp_all_targets_tbl[] = { 115 { "any", BOND_ARP_TARGETS_ANY, BOND_VALFLAG_DEFAULT}, 116 { "all", BOND_ARP_TARGETS_ALL, 0}, 117 { NULL, -1, 0}, 118 }; 119 120 static const struct bond_opt_value bond_fail_over_mac_tbl[] = { 121 { "none", BOND_FOM_NONE, BOND_VALFLAG_DEFAULT}, 122 { "active", BOND_FOM_ACTIVE, 0}, 123 { "follow", BOND_FOM_FOLLOW, 0}, 124 { NULL, -1, 0}, 125 }; 126 127 static const struct bond_opt_value bond_intmax_tbl[] = { 128 { "off", 0, BOND_VALFLAG_DEFAULT}, 129 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 130 { NULL, -1, 0} 131 }; 132 133 static const struct bond_opt_value bond_lacp_rate_tbl[] = { 134 { "slow", AD_LACP_SLOW, 0}, 135 { "fast", AD_LACP_FAST, 0}, 136 { NULL, -1, 0}, 137 }; 138 139 static const struct bond_opt_value bond_ad_select_tbl[] = { 140 { "stable", BOND_AD_STABLE, BOND_VALFLAG_DEFAULT}, 141 { "bandwidth", BOND_AD_BANDWIDTH, 0}, 142 { "count", BOND_AD_COUNT, 0}, 143 { NULL, -1, 0}, 144 }; 145 146 static const struct bond_opt_value bond_num_peer_notif_tbl[] = { 147 { "off", 0, 0}, 148 { "maxval", 255, BOND_VALFLAG_MAX}, 149 { "default", 1, BOND_VALFLAG_DEFAULT}, 150 { NULL, -1, 0} 151 }; 152 153 static const struct bond_opt_value bond_primary_reselect_tbl[] = { 154 { "always", BOND_PRI_RESELECT_ALWAYS, BOND_VALFLAG_DEFAULT}, 155 { "better", BOND_PRI_RESELECT_BETTER, 0}, 156 { "failure", BOND_PRI_RESELECT_FAILURE, 0}, 157 { NULL, -1}, 158 }; 159 160 static const struct bond_opt_value bond_use_carrier_tbl[] = { 161 { "off", 0, 0}, 162 { "on", 1, BOND_VALFLAG_DEFAULT}, 163 { NULL, -1, 0} 164 }; 165 166 static const struct bond_opt_value bond_all_slaves_active_tbl[] = { 167 { "off", 0, BOND_VALFLAG_DEFAULT}, 168 { "on", 1, 0}, 169 { NULL, -1, 0} 170 }; 171 172 static const struct bond_opt_value bond_resend_igmp_tbl[] = { 173 { "off", 0, 0}, 174 { "maxval", 255, BOND_VALFLAG_MAX}, 175 { "default", 1, BOND_VALFLAG_DEFAULT}, 176 { NULL, -1, 0} 177 }; 178 179 static const struct bond_opt_value bond_lp_interval_tbl[] = { 180 { "minval", 1, BOND_VALFLAG_MIN | BOND_VALFLAG_DEFAULT}, 181 { "maxval", INT_MAX, BOND_VALFLAG_MAX}, 182 { NULL, -1, 0}, 183 }; 184 185 static const struct bond_opt_value bond_tlb_dynamic_lb_tbl[] = { 186 { "off", 0, 0}, 187 { "on", 1, BOND_VALFLAG_DEFAULT}, 188 { NULL, -1, 0} 189 }; 190 191 static const struct bond_option bond_opts[] = { 192 [BOND_OPT_MODE] = { 193 .id = BOND_OPT_MODE, 194 .name = "mode", 195 .desc = "bond device mode", 196 .flags = BOND_OPTFLAG_NOSLAVES | BOND_OPTFLAG_IFDOWN, 197 .values = bond_mode_tbl, 198 .set = bond_option_mode_set 199 }, 200 [BOND_OPT_PACKETS_PER_SLAVE] = { 201 .id = BOND_OPT_PACKETS_PER_SLAVE, 202 .name = "packets_per_slave", 203 .desc = "Packets to send per slave in RR mode", 204 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ROUNDROBIN)), 205 .values = bond_pps_tbl, 206 .set = bond_option_pps_set 207 }, 208 [BOND_OPT_XMIT_HASH] = { 209 .id = BOND_OPT_XMIT_HASH, 210 .name = "xmit_hash_policy", 211 .desc = "balance-xor, 802.3ad, and tlb hashing method", 212 .values = bond_xmit_hashtype_tbl, 213 .set = bond_option_xmit_hash_policy_set 214 }, 215 [BOND_OPT_ARP_VALIDATE] = { 216 .id = BOND_OPT_ARP_VALIDATE, 217 .name = "arp_validate", 218 .desc = "validate src/dst of ARP probes", 219 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 220 BIT(BOND_MODE_ALB), 221 .values = bond_arp_validate_tbl, 222 .set = bond_option_arp_validate_set 223 }, 224 [BOND_OPT_ARP_ALL_TARGETS] = { 225 .id = BOND_OPT_ARP_ALL_TARGETS, 226 .name = "arp_all_targets", 227 .desc = "fail on any/all arp targets timeout", 228 .values = bond_arp_all_targets_tbl, 229 .set = bond_option_arp_all_targets_set 230 }, 231 [BOND_OPT_FAIL_OVER_MAC] = { 232 .id = BOND_OPT_FAIL_OVER_MAC, 233 .name = "fail_over_mac", 234 .desc = "For active-backup, do not set all slaves to the same MAC", 235 .flags = BOND_OPTFLAG_NOSLAVES, 236 .values = bond_fail_over_mac_tbl, 237 .set = bond_option_fail_over_mac_set 238 }, 239 [BOND_OPT_ARP_INTERVAL] = { 240 .id = BOND_OPT_ARP_INTERVAL, 241 .name = "arp_interval", 242 .desc = "arp interval in milliseconds", 243 .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | 244 BIT(BOND_MODE_ALB), 245 .values = bond_intmax_tbl, 246 .set = bond_option_arp_interval_set 247 }, 248 [BOND_OPT_ARP_TARGETS] = { 249 .id = BOND_OPT_ARP_TARGETS, 250 .name = "arp_ip_target", 251 .desc = "arp targets in n.n.n.n form", 252 .flags = BOND_OPTFLAG_RAWVAL, 253 .set = bond_option_arp_ip_targets_set 254 }, 255 [BOND_OPT_DOWNDELAY] = { 256 .id = BOND_OPT_DOWNDELAY, 257 .name = "downdelay", 258 .desc = "Delay before considering link down, in milliseconds", 259 .values = bond_intmax_tbl, 260 .set = bond_option_downdelay_set 261 }, 262 [BOND_OPT_UPDELAY] = { 263 .id = BOND_OPT_UPDELAY, 264 .name = "updelay", 265 .desc = "Delay before considering link up, in milliseconds", 266 .values = bond_intmax_tbl, 267 .set = bond_option_updelay_set 268 }, 269 [BOND_OPT_LACP_RATE] = { 270 .id = BOND_OPT_LACP_RATE, 271 .name = "lacp_rate", 272 .desc = "LACPDU tx rate to request from 802.3ad partner", 273 .flags = BOND_OPTFLAG_IFDOWN, 274 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 275 .values = bond_lacp_rate_tbl, 276 .set = bond_option_lacp_rate_set 277 }, 278 [BOND_OPT_MINLINKS] = { 279 .id = BOND_OPT_MINLINKS, 280 .name = "min_links", 281 .desc = "Minimum number of available links before turning on carrier", 282 .values = bond_intmax_tbl, 283 .set = bond_option_min_links_set 284 }, 285 [BOND_OPT_AD_SELECT] = { 286 .id = BOND_OPT_AD_SELECT, 287 .name = "ad_select", 288 .desc = "803.ad aggregation selection logic", 289 .flags = BOND_OPTFLAG_IFDOWN, 290 .values = bond_ad_select_tbl, 291 .set = bond_option_ad_select_set 292 }, 293 [BOND_OPT_NUM_PEER_NOTIF] = { 294 .id = BOND_OPT_NUM_PEER_NOTIF, 295 .name = "num_unsol_na", 296 .desc = "Number of peer notifications to send on failover event", 297 .values = bond_num_peer_notif_tbl, 298 .set = bond_option_num_peer_notif_set 299 }, 300 [BOND_OPT_MIIMON] = { 301 .id = BOND_OPT_MIIMON, 302 .name = "miimon", 303 .desc = "Link check interval in milliseconds", 304 .values = bond_intmax_tbl, 305 .set = bond_option_miimon_set 306 }, 307 [BOND_OPT_PRIMARY] = { 308 .id = BOND_OPT_PRIMARY, 309 .name = "primary", 310 .desc = "Primary network device to use", 311 .flags = BOND_OPTFLAG_RAWVAL, 312 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 313 BIT(BOND_MODE_TLB) | 314 BIT(BOND_MODE_ALB)), 315 .set = bond_option_primary_set 316 }, 317 [BOND_OPT_PRIMARY_RESELECT] = { 318 .id = BOND_OPT_PRIMARY_RESELECT, 319 .name = "primary_reselect", 320 .desc = "Reselect primary slave once it comes up", 321 .values = bond_primary_reselect_tbl, 322 .set = bond_option_primary_reselect_set 323 }, 324 [BOND_OPT_USE_CARRIER] = { 325 .id = BOND_OPT_USE_CARRIER, 326 .name = "use_carrier", 327 .desc = "Use netif_carrier_ok (vs MII ioctls) in miimon", 328 .values = bond_use_carrier_tbl, 329 .set = bond_option_use_carrier_set 330 }, 331 [BOND_OPT_ACTIVE_SLAVE] = { 332 .id = BOND_OPT_ACTIVE_SLAVE, 333 .name = "active_slave", 334 .desc = "Currently active slave", 335 .flags = BOND_OPTFLAG_RAWVAL, 336 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) | 337 BIT(BOND_MODE_TLB) | 338 BIT(BOND_MODE_ALB)), 339 .set = bond_option_active_slave_set 340 }, 341 [BOND_OPT_QUEUE_ID] = { 342 .id = BOND_OPT_QUEUE_ID, 343 .name = "queue_id", 344 .desc = "Set queue id of a slave", 345 .flags = BOND_OPTFLAG_RAWVAL, 346 .set = bond_option_queue_id_set 347 }, 348 [BOND_OPT_ALL_SLAVES_ACTIVE] = { 349 .id = BOND_OPT_ALL_SLAVES_ACTIVE, 350 .name = "all_slaves_active", 351 .desc = "Keep all frames received on an interface by setting active flag for all slaves", 352 .values = bond_all_slaves_active_tbl, 353 .set = bond_option_all_slaves_active_set 354 }, 355 [BOND_OPT_RESEND_IGMP] = { 356 .id = BOND_OPT_RESEND_IGMP, 357 .name = "resend_igmp", 358 .desc = "Number of IGMP membership reports to send on link failure", 359 .values = bond_resend_igmp_tbl, 360 .set = bond_option_resend_igmp_set 361 }, 362 [BOND_OPT_LP_INTERVAL] = { 363 .id = BOND_OPT_LP_INTERVAL, 364 .name = "lp_interval", 365 .desc = "The number of seconds between instances where the bonding driver sends learning packets to each slave's peer switch", 366 .values = bond_lp_interval_tbl, 367 .set = bond_option_lp_interval_set 368 }, 369 [BOND_OPT_SLAVES] = { 370 .id = BOND_OPT_SLAVES, 371 .name = "slaves", 372 .desc = "Slave membership management", 373 .flags = BOND_OPTFLAG_RAWVAL, 374 .set = bond_option_slaves_set 375 }, 376 [BOND_OPT_TLB_DYNAMIC_LB] = { 377 .id = BOND_OPT_TLB_DYNAMIC_LB, 378 .name = "tlb_dynamic_lb", 379 .desc = "Enable dynamic flow shuffling", 380 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_TLB)), 381 .values = bond_tlb_dynamic_lb_tbl, 382 .flags = BOND_OPTFLAG_IFDOWN, 383 .set = bond_option_tlb_dynamic_lb_set, 384 }, 385 { } 386 }; 387 388 /* Searches for an option by name */ 389 const struct bond_option *bond_opt_get_by_name(const char *name) 390 { 391 const struct bond_option *opt; 392 int option; 393 394 for (option = 0; option < BOND_OPT_LAST; option++) { 395 opt = bond_opt_get(option); 396 if (opt && !strcmp(opt->name, name)) 397 return opt; 398 } 399 400 return NULL; 401 } 402 403 /* Searches for a value in opt's values[] table */ 404 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val) 405 { 406 const struct bond_option *opt; 407 int i; 408 409 opt = bond_opt_get(option); 410 if (WARN_ON(!opt)) 411 return NULL; 412 for (i = 0; opt->values && opt->values[i].string; i++) 413 if (opt->values[i].value == val) 414 return &opt->values[i]; 415 416 return NULL; 417 } 418 419 /* Searches for a value in opt's values[] table which matches the flagmask */ 420 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt, 421 u32 flagmask) 422 { 423 int i; 424 425 for (i = 0; opt->values && opt->values[i].string; i++) 426 if (opt->values[i].flags & flagmask) 427 return &opt->values[i]; 428 429 return NULL; 430 } 431 432 /* If maxval is missing then there's no range to check. In case minval is 433 * missing then it's considered to be 0. 434 */ 435 static bool bond_opt_check_range(const struct bond_option *opt, u64 val) 436 { 437 const struct bond_opt_value *minval, *maxval; 438 439 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 440 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 441 if (!maxval || (minval && val < minval->value) || val > maxval->value) 442 return false; 443 444 return true; 445 } 446 447 /** 448 * bond_opt_parse - parse option value 449 * @opt: the option to parse against 450 * @val: value to parse 451 * 452 * This function tries to extract the value from @val and check if it's 453 * a possible match for the option and returns NULL if a match isn't found, 454 * or the struct_opt_value that matched. It also strips the new line from 455 * @val->string if it's present. 456 */ 457 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, 458 struct bond_opt_value *val) 459 { 460 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, }; 461 const struct bond_opt_value *tbl; 462 const struct bond_opt_value *ret = NULL; 463 bool checkval; 464 int i, rv; 465 466 /* No parsing if the option wants a raw val */ 467 if (opt->flags & BOND_OPTFLAG_RAWVAL) 468 return val; 469 470 tbl = opt->values; 471 if (!tbl) 472 goto out; 473 474 /* ULLONG_MAX is used to bypass string processing */ 475 checkval = val->value != ULLONG_MAX; 476 if (!checkval) { 477 if (!val->string) 478 goto out; 479 p = strchr(val->string, '\n'); 480 if (p) 481 *p = '\0'; 482 for (p = val->string; *p; p++) 483 if (!(isdigit(*p) || isspace(*p))) 484 break; 485 /* The following code extracts the string to match or the value 486 * and sets checkval appropriately 487 */ 488 if (*p) { 489 rv = sscanf(val->string, "%32s", valstr); 490 } else { 491 rv = sscanf(val->string, "%llu", &val->value); 492 checkval = true; 493 } 494 if (!rv) 495 goto out; 496 } 497 498 for (i = 0; tbl[i].string; i++) { 499 /* Check for exact match */ 500 if (checkval) { 501 if (val->value == tbl[i].value) 502 ret = &tbl[i]; 503 } else { 504 if (!strcmp(valstr, "default") && 505 (tbl[i].flags & BOND_VALFLAG_DEFAULT)) 506 ret = &tbl[i]; 507 508 if (!strcmp(valstr, tbl[i].string)) 509 ret = &tbl[i]; 510 } 511 /* Found an exact match */ 512 if (ret) 513 goto out; 514 } 515 /* Possible range match */ 516 if (checkval && bond_opt_check_range(opt, val->value)) 517 ret = val; 518 out: 519 return ret; 520 } 521 522 /* Check opt's dependencies against bond mode and currently set options */ 523 static int bond_opt_check_deps(struct bonding *bond, 524 const struct bond_option *opt) 525 { 526 struct bond_params *params = &bond->params; 527 528 if (test_bit(params->mode, &opt->unsuppmodes)) 529 return -EACCES; 530 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond)) 531 return -ENOTEMPTY; 532 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) 533 return -EBUSY; 534 535 return 0; 536 } 537 538 static void bond_opt_dep_print(struct bonding *bond, 539 const struct bond_option *opt) 540 { 541 const struct bond_opt_value *modeval; 542 struct bond_params *params; 543 544 params = &bond->params; 545 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); 546 if (test_bit(params->mode, &opt->unsuppmodes)) 547 pr_err("%s: option %s: mode dependency failed, not supported in mode %s(%llu)\n", 548 bond->dev->name, opt->name, 549 modeval->string, modeval->value); 550 } 551 552 static void bond_opt_error_interpret(struct bonding *bond, 553 const struct bond_option *opt, 554 int error, const struct bond_opt_value *val) 555 { 556 const struct bond_opt_value *minval, *maxval; 557 char *p; 558 559 switch (error) { 560 case -EINVAL: 561 if (val) { 562 if (val->string) { 563 /* sometimes RAWVAL opts may have new lines */ 564 p = strchr(val->string, '\n'); 565 if (p) 566 *p = '\0'; 567 pr_err("%s: option %s: invalid value (%s)\n", 568 bond->dev->name, opt->name, val->string); 569 } else { 570 pr_err("%s: option %s: invalid value (%llu)\n", 571 bond->dev->name, opt->name, val->value); 572 } 573 } 574 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 575 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 576 if (!maxval) 577 break; 578 pr_err("%s: option %s: allowed values %llu - %llu\n", 579 bond->dev->name, opt->name, minval ? minval->value : 0, 580 maxval->value); 581 break; 582 case -EACCES: 583 bond_opt_dep_print(bond, opt); 584 break; 585 case -ENOTEMPTY: 586 pr_err("%s: option %s: unable to set because the bond device has slaves\n", 587 bond->dev->name, opt->name); 588 break; 589 case -EBUSY: 590 pr_err("%s: option %s: unable to set because the bond device is up\n", 591 bond->dev->name, opt->name); 592 break; 593 default: 594 break; 595 } 596 } 597 598 /** 599 * __bond_opt_set - set a bonding option 600 * @bond: target bond device 601 * @option: option to set 602 * @val: value to set it to 603 * 604 * This function is used to change the bond's option value, it can be 605 * used for both enabling/changing an option and for disabling it. RTNL lock 606 * must be obtained before calling this function. 607 */ 608 int __bond_opt_set(struct bonding *bond, 609 unsigned int option, struct bond_opt_value *val) 610 { 611 const struct bond_opt_value *retval = NULL; 612 const struct bond_option *opt; 613 int ret = -ENOENT; 614 615 ASSERT_RTNL(); 616 617 opt = bond_opt_get(option); 618 if (WARN_ON(!val) || WARN_ON(!opt)) 619 goto out; 620 ret = bond_opt_check_deps(bond, opt); 621 if (ret) 622 goto out; 623 retval = bond_opt_parse(opt, val); 624 if (!retval) { 625 ret = -EINVAL; 626 goto out; 627 } 628 ret = opt->set(bond, retval); 629 out: 630 if (ret) 631 bond_opt_error_interpret(bond, opt, ret, val); 632 633 return ret; 634 } 635 636 /** 637 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set 638 * @bond: target bond device 639 * @option: option to set 640 * @buf: value to set it to 641 * 642 * This function tries to acquire RTNL without blocking and if successful 643 * calls __bond_opt_set. It is mainly used for sysfs option manipulation. 644 */ 645 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) 646 { 647 struct bond_opt_value optval; 648 int ret; 649 650 if (!rtnl_trylock()) 651 return restart_syscall(); 652 bond_opt_initstr(&optval, buf); 653 ret = __bond_opt_set(bond, option, &optval); 654 rtnl_unlock(); 655 656 return ret; 657 } 658 659 /** 660 * bond_opt_get - get a pointer to an option 661 * @option: option for which to return a pointer 662 * 663 * This function checks if option is valid and if so returns a pointer 664 * to its entry in the bond_opts[] option array. 665 */ 666 const struct bond_option *bond_opt_get(unsigned int option) 667 { 668 if (!BOND_OPT_VALID(option)) 669 return NULL; 670 671 return &bond_opts[option]; 672 } 673 674 int bond_option_mode_set(struct bonding *bond, const struct bond_opt_value *newval) 675 { 676 if (!bond_mode_uses_arp(newval->value) && bond->params.arp_interval) { 677 pr_info("%s: %s mode is incompatible with arp monitoring, start mii monitoring\n", 678 bond->dev->name, newval->string); 679 /* disable arp monitoring */ 680 bond->params.arp_interval = 0; 681 /* set miimon to default value */ 682 bond->params.miimon = BOND_DEFAULT_MIIMON; 683 pr_info("%s: Setting MII monitoring interval to %d\n", 684 bond->dev->name, bond->params.miimon); 685 } 686 687 /* don't cache arp_validate between modes */ 688 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 689 bond->params.mode = newval->value; 690 691 return 0; 692 } 693 694 static struct net_device *__bond_option_active_slave_get(struct bonding *bond, 695 struct slave *slave) 696 { 697 return bond_uses_primary(bond) && slave ? slave->dev : NULL; 698 } 699 700 struct net_device *bond_option_active_slave_get_rcu(struct bonding *bond) 701 { 702 struct slave *slave = rcu_dereference(bond->curr_active_slave); 703 704 return __bond_option_active_slave_get(bond, slave); 705 } 706 707 struct net_device *bond_option_active_slave_get(struct bonding *bond) 708 { 709 return __bond_option_active_slave_get(bond, bond->curr_active_slave); 710 } 711 712 static int bond_option_active_slave_set(struct bonding *bond, 713 const struct bond_opt_value *newval) 714 { 715 char ifname[IFNAMSIZ] = { 0, }; 716 struct net_device *slave_dev; 717 int ret = 0; 718 719 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ 720 if (!strlen(ifname) || newval->string[0] == '\n') { 721 slave_dev = NULL; 722 } else { 723 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); 724 if (!slave_dev) 725 return -ENODEV; 726 } 727 728 if (slave_dev) { 729 if (!netif_is_bond_slave(slave_dev)) { 730 pr_err("Device %s is not bonding slave\n", 731 slave_dev->name); 732 return -EINVAL; 733 } 734 735 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { 736 pr_err("%s: Device %s is not our slave\n", 737 bond->dev->name, slave_dev->name); 738 return -EINVAL; 739 } 740 } 741 742 block_netpoll_tx(); 743 write_lock_bh(&bond->curr_slave_lock); 744 745 /* check to see if we are clearing active */ 746 if (!slave_dev) { 747 pr_info("%s: Clearing current active slave\n", bond->dev->name); 748 RCU_INIT_POINTER(bond->curr_active_slave, NULL); 749 bond_select_active_slave(bond); 750 } else { 751 struct slave *old_active = bond->curr_active_slave; 752 struct slave *new_active = bond_slave_get_rtnl(slave_dev); 753 754 BUG_ON(!new_active); 755 756 if (new_active == old_active) { 757 /* do nothing */ 758 pr_info("%s: %s is already the current active slave\n", 759 bond->dev->name, new_active->dev->name); 760 } else { 761 if (old_active && (new_active->link == BOND_LINK_UP) && 762 bond_slave_is_up(new_active)) { 763 pr_info("%s: Setting %s as active slave\n", 764 bond->dev->name, new_active->dev->name); 765 bond_change_active_slave(bond, new_active); 766 } else { 767 pr_err("%s: Could not set %s as active slave; either %s is down or the link is down\n", 768 bond->dev->name, new_active->dev->name, 769 new_active->dev->name); 770 ret = -EINVAL; 771 } 772 } 773 } 774 775 write_unlock_bh(&bond->curr_slave_lock); 776 unblock_netpoll_tx(); 777 778 return ret; 779 } 780 781 /* There are two tricky bits here. First, if MII monitoring is activated, then 782 * we must disable ARP monitoring. Second, if the timer isn't running, we must 783 * start it. 784 */ 785 static int bond_option_miimon_set(struct bonding *bond, 786 const struct bond_opt_value *newval) 787 { 788 pr_info("%s: Setting MII monitoring interval to %llu\n", 789 bond->dev->name, newval->value); 790 bond->params.miimon = newval->value; 791 if (bond->params.updelay) 792 pr_info("%s: Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", 793 bond->dev->name, 794 bond->params.updelay * bond->params.miimon); 795 if (bond->params.downdelay) 796 pr_info("%s: Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", 797 bond->dev->name, 798 bond->params.downdelay * bond->params.miimon); 799 if (newval->value && bond->params.arp_interval) { 800 pr_info("%s: MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n", 801 bond->dev->name); 802 bond->params.arp_interval = 0; 803 if (bond->params.arp_validate) 804 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 805 } 806 if (bond->dev->flags & IFF_UP) { 807 /* If the interface is up, we may need to fire off 808 * the MII timer. If the interface is down, the 809 * timer will get fired off when the open function 810 * is called. 811 */ 812 if (!newval->value) { 813 cancel_delayed_work_sync(&bond->mii_work); 814 } else { 815 cancel_delayed_work_sync(&bond->arp_work); 816 queue_delayed_work(bond->wq, &bond->mii_work, 0); 817 } 818 } 819 820 return 0; 821 } 822 823 /* Set up and down delays. These must be multiples of the 824 * MII monitoring value, and are stored internally as the multiplier. 825 * Thus, we must translate to MS for the real world. 826 */ 827 static int bond_option_updelay_set(struct bonding *bond, 828 const struct bond_opt_value *newval) 829 { 830 int value = newval->value; 831 832 if (!bond->params.miimon) { 833 pr_err("%s: Unable to set up delay as MII monitoring is disabled\n", 834 bond->dev->name); 835 return -EPERM; 836 } 837 if ((value % bond->params.miimon) != 0) { 838 pr_warn("%s: Warning: up delay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", 839 bond->dev->name, value, 840 bond->params.miimon, 841 (value / bond->params.miimon) * 842 bond->params.miimon); 843 } 844 bond->params.updelay = value / bond->params.miimon; 845 pr_info("%s: Setting up delay to %d\n", 846 bond->dev->name, bond->params.updelay * bond->params.miimon); 847 848 return 0; 849 } 850 851 static int bond_option_downdelay_set(struct bonding *bond, 852 const struct bond_opt_value *newval) 853 { 854 int value = newval->value; 855 856 if (!bond->params.miimon) { 857 pr_err("%s: Unable to set down delay as MII monitoring is disabled\n", 858 bond->dev->name); 859 return -EPERM; 860 } 861 if ((value % bond->params.miimon) != 0) { 862 pr_warn("%s: Warning: down delay (%d) is not a multiple of miimon (%d), delay rounded to %d ms\n", 863 bond->dev->name, value, 864 bond->params.miimon, 865 (value / bond->params.miimon) * 866 bond->params.miimon); 867 } 868 bond->params.downdelay = value / bond->params.miimon; 869 pr_info("%s: Setting down delay to %d\n", 870 bond->dev->name, bond->params.downdelay * bond->params.miimon); 871 872 return 0; 873 } 874 875 static int bond_option_use_carrier_set(struct bonding *bond, 876 const struct bond_opt_value *newval) 877 { 878 pr_info("%s: Setting use_carrier to %llu\n", 879 bond->dev->name, newval->value); 880 bond->params.use_carrier = newval->value; 881 882 return 0; 883 } 884 885 /* There are two tricky bits here. First, if ARP monitoring is activated, then 886 * we must disable MII monitoring. Second, if the ARP timer isn't running, 887 * we must start it. 888 */ 889 static int bond_option_arp_interval_set(struct bonding *bond, 890 const struct bond_opt_value *newval) 891 { 892 pr_info("%s: Setting ARP monitoring interval to %llu\n", 893 bond->dev->name, newval->value); 894 bond->params.arp_interval = newval->value; 895 if (newval->value) { 896 if (bond->params.miimon) { 897 pr_info("%s: ARP monitoring cannot be used with MII monitoring. %s Disabling MII monitoring\n", 898 bond->dev->name, bond->dev->name); 899 bond->params.miimon = 0; 900 } 901 if (!bond->params.arp_targets[0]) 902 pr_info("%s: ARP monitoring has been set up, but no ARP targets have been specified\n", 903 bond->dev->name); 904 } 905 if (bond->dev->flags & IFF_UP) { 906 /* If the interface is up, we may need to fire off 907 * the ARP timer. If the interface is down, the 908 * timer will get fired off when the open function 909 * is called. 910 */ 911 if (!newval->value) { 912 if (bond->params.arp_validate) 913 bond->recv_probe = NULL; 914 cancel_delayed_work_sync(&bond->arp_work); 915 } else { 916 /* arp_validate can be set only in active-backup mode */ 917 bond->recv_probe = bond_arp_rcv; 918 cancel_delayed_work_sync(&bond->mii_work); 919 queue_delayed_work(bond->wq, &bond->arp_work, 0); 920 } 921 } 922 923 return 0; 924 } 925 926 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, 927 __be32 target, 928 unsigned long last_rx) 929 { 930 __be32 *targets = bond->params.arp_targets; 931 struct list_head *iter; 932 struct slave *slave; 933 934 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { 935 bond_for_each_slave(bond, slave, iter) 936 slave->target_last_arp_rx[slot] = last_rx; 937 targets[slot] = target; 938 } 939 } 940 941 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 942 { 943 __be32 *targets = bond->params.arp_targets; 944 int ind; 945 946 if (!bond_is_ip_target_ok(target)) { 947 pr_err("%s: invalid ARP target %pI4 specified for addition\n", 948 bond->dev->name, &target); 949 return -EINVAL; 950 } 951 952 if (bond_get_targets_ip(targets, target) != -1) { /* dup */ 953 pr_err("%s: ARP target %pI4 is already present\n", 954 bond->dev->name, &target); 955 return -EINVAL; 956 } 957 958 ind = bond_get_targets_ip(targets, 0); /* first free slot */ 959 if (ind == -1) { 960 pr_err("%s: ARP target table is full!\n", bond->dev->name); 961 return -EINVAL; 962 } 963 964 pr_info("%s: Adding ARP target %pI4\n", bond->dev->name, &target); 965 966 _bond_options_arp_ip_target_set(bond, ind, target, jiffies); 967 968 return 0; 969 } 970 971 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 972 { 973 int ret; 974 975 /* not to race with bond_arp_rcv */ 976 write_lock_bh(&bond->lock); 977 ret = _bond_option_arp_ip_target_add(bond, target); 978 write_unlock_bh(&bond->lock); 979 980 return ret; 981 } 982 983 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) 984 { 985 __be32 *targets = bond->params.arp_targets; 986 struct list_head *iter; 987 struct slave *slave; 988 unsigned long *targets_rx; 989 int ind, i; 990 991 if (!bond_is_ip_target_ok(target)) { 992 pr_err("%s: invalid ARP target %pI4 specified for removal\n", 993 bond->dev->name, &target); 994 return -EINVAL; 995 } 996 997 ind = bond_get_targets_ip(targets, target); 998 if (ind == -1) { 999 pr_err("%s: unable to remove nonexistent ARP target %pI4\n", 1000 bond->dev->name, &target); 1001 return -EINVAL; 1002 } 1003 1004 if (ind == 0 && !targets[1] && bond->params.arp_interval) 1005 pr_warn("%s: Removing last arp target with arp_interval on\n", 1006 bond->dev->name); 1007 1008 pr_info("%s: Removing ARP target %pI4\n", bond->dev->name, &target); 1009 1010 /* not to race with bond_arp_rcv */ 1011 write_lock_bh(&bond->lock); 1012 1013 bond_for_each_slave(bond, slave, iter) { 1014 targets_rx = slave->target_last_arp_rx; 1015 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1016 targets_rx[i] = targets_rx[i+1]; 1017 targets_rx[i] = 0; 1018 } 1019 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1020 targets[i] = targets[i+1]; 1021 targets[i] = 0; 1022 1023 write_unlock_bh(&bond->lock); 1024 1025 return 0; 1026 } 1027 1028 void bond_option_arp_ip_targets_clear(struct bonding *bond) 1029 { 1030 int i; 1031 1032 /* not to race with bond_arp_rcv */ 1033 write_lock_bh(&bond->lock); 1034 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 1035 _bond_options_arp_ip_target_set(bond, i, 0, 0); 1036 write_unlock_bh(&bond->lock); 1037 } 1038 1039 static int bond_option_arp_ip_targets_set(struct bonding *bond, 1040 const struct bond_opt_value *newval) 1041 { 1042 int ret = -EPERM; 1043 __be32 target; 1044 1045 if (newval->string) { 1046 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) { 1047 pr_err("%s: invalid ARP target %pI4 specified\n", 1048 bond->dev->name, &target); 1049 return ret; 1050 } 1051 if (newval->string[0] == '+') 1052 ret = bond_option_arp_ip_target_add(bond, target); 1053 else if (newval->string[0] == '-') 1054 ret = bond_option_arp_ip_target_rem(bond, target); 1055 else 1056 pr_err("no command found in arp_ip_targets file for bond %s - use +<addr> or -<addr>\n", 1057 bond->dev->name); 1058 } else { 1059 target = newval->value; 1060 ret = bond_option_arp_ip_target_add(bond, target); 1061 } 1062 1063 return ret; 1064 } 1065 1066 static int bond_option_arp_validate_set(struct bonding *bond, 1067 const struct bond_opt_value *newval) 1068 { 1069 pr_info("%s: Setting arp_validate to %s (%llu)\n", 1070 bond->dev->name, newval->string, newval->value); 1071 1072 if (bond->dev->flags & IFF_UP) { 1073 if (!newval->value) 1074 bond->recv_probe = NULL; 1075 else if (bond->params.arp_interval) 1076 bond->recv_probe = bond_arp_rcv; 1077 } 1078 bond->params.arp_validate = newval->value; 1079 1080 return 0; 1081 } 1082 1083 static int bond_option_arp_all_targets_set(struct bonding *bond, 1084 const struct bond_opt_value *newval) 1085 { 1086 pr_info("%s: Setting arp_all_targets to %s (%llu)\n", 1087 bond->dev->name, newval->string, newval->value); 1088 bond->params.arp_all_targets = newval->value; 1089 1090 return 0; 1091 } 1092 1093 static int bond_option_primary_set(struct bonding *bond, 1094 const struct bond_opt_value *newval) 1095 { 1096 char *p, *primary = newval->string; 1097 struct list_head *iter; 1098 struct slave *slave; 1099 1100 block_netpoll_tx(); 1101 read_lock(&bond->lock); 1102 write_lock_bh(&bond->curr_slave_lock); 1103 1104 p = strchr(primary, '\n'); 1105 if (p) 1106 *p = '\0'; 1107 /* check to see if we are clearing primary */ 1108 if (!strlen(primary)) { 1109 pr_info("%s: Setting primary slave to None\n", bond->dev->name); 1110 bond->primary_slave = NULL; 1111 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1112 bond_select_active_slave(bond); 1113 goto out; 1114 } 1115 1116 bond_for_each_slave(bond, slave, iter) { 1117 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1118 pr_info("%s: Setting %s as primary slave\n", 1119 bond->dev->name, slave->dev->name); 1120 bond->primary_slave = slave; 1121 strcpy(bond->params.primary, slave->dev->name); 1122 bond_select_active_slave(bond); 1123 goto out; 1124 } 1125 } 1126 1127 if (bond->primary_slave) { 1128 pr_info("%s: Setting primary slave to None\n", bond->dev->name); 1129 bond->primary_slave = NULL; 1130 bond_select_active_slave(bond); 1131 } 1132 strncpy(bond->params.primary, primary, IFNAMSIZ); 1133 bond->params.primary[IFNAMSIZ - 1] = 0; 1134 1135 pr_info("%s: Recording %s as primary, but it has not been enslaved to %s yet\n", 1136 bond->dev->name, primary, bond->dev->name); 1137 1138 out: 1139 write_unlock_bh(&bond->curr_slave_lock); 1140 read_unlock(&bond->lock); 1141 unblock_netpoll_tx(); 1142 1143 return 0; 1144 } 1145 1146 static int bond_option_primary_reselect_set(struct bonding *bond, 1147 const struct bond_opt_value *newval) 1148 { 1149 pr_info("%s: Setting primary_reselect to %s (%llu)\n", 1150 bond->dev->name, newval->string, newval->value); 1151 bond->params.primary_reselect = newval->value; 1152 1153 block_netpoll_tx(); 1154 write_lock_bh(&bond->curr_slave_lock); 1155 bond_select_active_slave(bond); 1156 write_unlock_bh(&bond->curr_slave_lock); 1157 unblock_netpoll_tx(); 1158 1159 return 0; 1160 } 1161 1162 static int bond_option_fail_over_mac_set(struct bonding *bond, 1163 const struct bond_opt_value *newval) 1164 { 1165 pr_info("%s: Setting fail_over_mac to %s (%llu)\n", 1166 bond->dev->name, newval->string, newval->value); 1167 bond->params.fail_over_mac = newval->value; 1168 1169 return 0; 1170 } 1171 1172 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1173 const struct bond_opt_value *newval) 1174 { 1175 pr_info("%s: Setting xmit hash policy to %s (%llu)\n", 1176 bond->dev->name, newval->string, newval->value); 1177 bond->params.xmit_policy = newval->value; 1178 1179 return 0; 1180 } 1181 1182 static int bond_option_resend_igmp_set(struct bonding *bond, 1183 const struct bond_opt_value *newval) 1184 { 1185 pr_info("%s: Setting resend_igmp to %llu\n", 1186 bond->dev->name, newval->value); 1187 bond->params.resend_igmp = newval->value; 1188 1189 return 0; 1190 } 1191 1192 static int bond_option_num_peer_notif_set(struct bonding *bond, 1193 const struct bond_opt_value *newval) 1194 { 1195 bond->params.num_peer_notif = newval->value; 1196 1197 return 0; 1198 } 1199 1200 static int bond_option_all_slaves_active_set(struct bonding *bond, 1201 const struct bond_opt_value *newval) 1202 { 1203 struct list_head *iter; 1204 struct slave *slave; 1205 1206 if (newval->value == bond->params.all_slaves_active) 1207 return 0; 1208 bond->params.all_slaves_active = newval->value; 1209 bond_for_each_slave(bond, slave, iter) { 1210 if (!bond_is_active_slave(slave)) { 1211 if (newval->value) 1212 slave->inactive = 0; 1213 else 1214 slave->inactive = 1; 1215 } 1216 } 1217 1218 return 0; 1219 } 1220 1221 static int bond_option_min_links_set(struct bonding *bond, 1222 const struct bond_opt_value *newval) 1223 { 1224 pr_info("%s: Setting min links value to %llu\n", 1225 bond->dev->name, newval->value); 1226 bond->params.min_links = newval->value; 1227 1228 return 0; 1229 } 1230 1231 static int bond_option_lp_interval_set(struct bonding *bond, 1232 const struct bond_opt_value *newval) 1233 { 1234 bond->params.lp_interval = newval->value; 1235 1236 return 0; 1237 } 1238 1239 static int bond_option_pps_set(struct bonding *bond, 1240 const struct bond_opt_value *newval) 1241 { 1242 bond->params.packets_per_slave = newval->value; 1243 if (newval->value > 0) { 1244 bond->params.reciprocal_packets_per_slave = 1245 reciprocal_value(newval->value); 1246 } else { 1247 /* reciprocal_packets_per_slave is unused if 1248 * packets_per_slave is 0 or 1, just initialize it 1249 */ 1250 bond->params.reciprocal_packets_per_slave = 1251 (struct reciprocal_value) { 0 }; 1252 } 1253 1254 return 0; 1255 } 1256 1257 static int bond_option_lacp_rate_set(struct bonding *bond, 1258 const struct bond_opt_value *newval) 1259 { 1260 pr_info("%s: Setting LACP rate to %s (%llu)\n", 1261 bond->dev->name, newval->string, newval->value); 1262 bond->params.lacp_fast = newval->value; 1263 bond_3ad_update_lacp_rate(bond); 1264 1265 return 0; 1266 } 1267 1268 static int bond_option_ad_select_set(struct bonding *bond, 1269 const struct bond_opt_value *newval) 1270 { 1271 pr_info("%s: Setting ad_select to %s (%llu)\n", 1272 bond->dev->name, newval->string, newval->value); 1273 bond->params.ad_select = newval->value; 1274 1275 return 0; 1276 } 1277 1278 static int bond_option_queue_id_set(struct bonding *bond, 1279 const struct bond_opt_value *newval) 1280 { 1281 struct slave *slave, *update_slave; 1282 struct net_device *sdev; 1283 struct list_head *iter; 1284 char *delim; 1285 int ret = 0; 1286 u16 qid; 1287 1288 /* delim will point to queue id if successful */ 1289 delim = strchr(newval->string, ':'); 1290 if (!delim) 1291 goto err_no_cmd; 1292 1293 /* Terminate string that points to device name and bump it 1294 * up one, so we can read the queue id there. 1295 */ 1296 *delim = '\0'; 1297 if (sscanf(++delim, "%hd\n", &qid) != 1) 1298 goto err_no_cmd; 1299 1300 /* Check buffer length, valid ifname and queue id */ 1301 if (!dev_valid_name(newval->string) || 1302 qid > bond->dev->real_num_tx_queues) 1303 goto err_no_cmd; 1304 1305 /* Get the pointer to that interface if it exists */ 1306 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1307 if (!sdev) 1308 goto err_no_cmd; 1309 1310 /* Search for thes slave and check for duplicate qids */ 1311 update_slave = NULL; 1312 bond_for_each_slave(bond, slave, iter) { 1313 if (sdev == slave->dev) 1314 /* We don't need to check the matching 1315 * slave for dups, since we're overwriting it 1316 */ 1317 update_slave = slave; 1318 else if (qid && qid == slave->queue_id) { 1319 goto err_no_cmd; 1320 } 1321 } 1322 1323 if (!update_slave) 1324 goto err_no_cmd; 1325 1326 /* Actually set the qids for the slave */ 1327 update_slave->queue_id = qid; 1328 1329 out: 1330 return ret; 1331 1332 err_no_cmd: 1333 pr_info("invalid input for queue_id set for %s\n", bond->dev->name); 1334 ret = -EPERM; 1335 goto out; 1336 1337 } 1338 1339 static int bond_option_slaves_set(struct bonding *bond, 1340 const struct bond_opt_value *newval) 1341 { 1342 char command[IFNAMSIZ + 1] = { 0, }; 1343 struct net_device *dev; 1344 char *ifname; 1345 int ret; 1346 1347 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1348 ifname = command + 1; 1349 if ((strlen(command) <= 1) || 1350 !dev_valid_name(ifname)) 1351 goto err_no_cmd; 1352 1353 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1354 if (!dev) { 1355 pr_info("%s: interface %s does not exist!\n", 1356 bond->dev->name, ifname); 1357 ret = -ENODEV; 1358 goto out; 1359 } 1360 1361 switch (command[0]) { 1362 case '+': 1363 pr_info("%s: Adding slave %s\n", bond->dev->name, dev->name); 1364 ret = bond_enslave(bond->dev, dev); 1365 break; 1366 1367 case '-': 1368 pr_info("%s: Removing slave %s\n", bond->dev->name, dev->name); 1369 ret = bond_release(bond->dev, dev); 1370 break; 1371 1372 default: 1373 goto err_no_cmd; 1374 } 1375 1376 out: 1377 return ret; 1378 1379 err_no_cmd: 1380 pr_err("no command found in slaves file for bond %s - use +ifname or -ifname\n", 1381 bond->dev->name); 1382 ret = -EPERM; 1383 goto out; 1384 } 1385 1386 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1387 const struct bond_opt_value *newval) 1388 { 1389 pr_info("%s: Setting dynamic-lb to %s (%llu)\n", 1390 bond->dev->name, newval->string, newval->value); 1391 bond->params.tlb_dynamic_lb = newval->value; 1392 1393 return 0; 1394 } 1395