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