1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/net/bond/bond_options.c - bonding options 4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> 5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> 6 */ 7 8 #include <linux/errno.h> 9 #include <linux/if.h> 10 #include <linux/netdevice.h> 11 #include <linux/spinlock.h> 12 #include <linux/rcupdate.h> 13 #include <linux/ctype.h> 14 #include <linux/inet.h> 15 #include <linux/sched/signal.h> 16 17 #include <net/bonding.h> 18 19 static int bond_option_active_slave_set(struct bonding *bond, 20 const struct bond_opt_value *newval); 21 static int bond_option_miimon_set(struct bonding *bond, 22 const struct bond_opt_value *newval); 23 static int bond_option_updelay_set(struct bonding *bond, 24 const struct bond_opt_value *newval); 25 static int bond_option_downdelay_set(struct bonding *bond, 26 const struct bond_opt_value *newval); 27 static int bond_option_peer_notif_delay_set(struct bonding *bond, 28 const struct bond_opt_value *newval); 29 static int bond_option_use_carrier_set(struct bonding *bond, 30 const struct bond_opt_value *newval); 31 static int bond_option_arp_interval_set(struct bonding *bond, 32 const struct bond_opt_value *newval); 33 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target); 34 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target); 35 static int bond_option_arp_ip_targets_set(struct bonding *bond, 36 const struct bond_opt_value *newval); 37 static int bond_option_arp_validate_set(struct bonding *bond, 38 const struct bond_opt_value *newval); 39 static int bond_option_arp_all_targets_set(struct bonding *bond, 40 const struct bond_opt_value *newval); 41 static int bond_option_primary_set(struct bonding *bond, 42 const struct bond_opt_value *newval); 43 static int bond_option_primary_reselect_set(struct bonding *bond, 44 const struct bond_opt_value *newval); 45 static int bond_option_fail_over_mac_set(struct bonding *bond, 46 const struct bond_opt_value *newval); 47 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 48 const struct bond_opt_value *newval); 49 static int bond_option_resend_igmp_set(struct bonding *bond, 50 const struct bond_opt_value *newval); 51 static int bond_option_num_peer_notif_set(struct bonding *bond, 52 const struct bond_opt_value *newval); 53 static int bond_option_all_slaves_active_set(struct bonding *bond, 54 const struct bond_opt_value *newval); 55 static int bond_option_min_links_set(struct bonding *bond, 56 const struct bond_opt_value *newval); 57 static int bond_option_lp_interval_set(struct bonding *bond, 58 const struct bond_opt_value *newval); 59 static int bond_option_pps_set(struct bonding *bond, 60 const struct bond_opt_value *newval); 61 static int bond_option_lacp_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) | BIT(BOND_MODE_ALB)), 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 .values = bond_ad_actor_sys_prio_tbl, 406 .set = bond_option_ad_actor_sys_prio_set, 407 }, 408 [BOND_OPT_AD_ACTOR_SYSTEM] = { 409 .id = BOND_OPT_AD_ACTOR_SYSTEM, 410 .name = "ad_actor_system", 411 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 412 .flags = BOND_OPTFLAG_RAWVAL, 413 .set = bond_option_ad_actor_system_set, 414 }, 415 [BOND_OPT_AD_USER_PORT_KEY] = { 416 .id = BOND_OPT_AD_USER_PORT_KEY, 417 .name = "ad_user_port_key", 418 .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_8023AD)), 419 .flags = BOND_OPTFLAG_IFDOWN, 420 .values = bond_ad_user_port_key_tbl, 421 .set = bond_option_ad_user_port_key_set, 422 }, 423 [BOND_OPT_NUM_PEER_NOTIF_ALIAS] = { 424 .id = BOND_OPT_NUM_PEER_NOTIF_ALIAS, 425 .name = "num_grat_arp", 426 .desc = "Number of peer notifications to send on failover event", 427 .values = bond_num_peer_notif_tbl, 428 .set = bond_option_num_peer_notif_set 429 }, 430 [BOND_OPT_PEER_NOTIF_DELAY] = { 431 .id = BOND_OPT_PEER_NOTIF_DELAY, 432 .name = "peer_notif_delay", 433 .desc = "Delay between each peer notification on failover event, in milliseconds", 434 .values = bond_intmax_tbl, 435 .set = bond_option_peer_notif_delay_set 436 } 437 }; 438 439 /* Searches for an option by name */ 440 const struct bond_option *bond_opt_get_by_name(const char *name) 441 { 442 const struct bond_option *opt; 443 int option; 444 445 for (option = 0; option < BOND_OPT_LAST; option++) { 446 opt = bond_opt_get(option); 447 if (opt && !strcmp(opt->name, name)) 448 return opt; 449 } 450 451 return NULL; 452 } 453 454 /* Searches for a value in opt's values[] table */ 455 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val) 456 { 457 const struct bond_option *opt; 458 int i; 459 460 opt = bond_opt_get(option); 461 if (WARN_ON(!opt)) 462 return NULL; 463 for (i = 0; opt->values && opt->values[i].string; i++) 464 if (opt->values[i].value == val) 465 return &opt->values[i]; 466 467 return NULL; 468 } 469 470 /* Searches for a value in opt's values[] table which matches the flagmask */ 471 static const struct bond_opt_value *bond_opt_get_flags(const struct bond_option *opt, 472 u32 flagmask) 473 { 474 int i; 475 476 for (i = 0; opt->values && opt->values[i].string; i++) 477 if (opt->values[i].flags & flagmask) 478 return &opt->values[i]; 479 480 return NULL; 481 } 482 483 /* If maxval is missing then there's no range to check. In case minval is 484 * missing then it's considered to be 0. 485 */ 486 static bool bond_opt_check_range(const struct bond_option *opt, u64 val) 487 { 488 const struct bond_opt_value *minval, *maxval; 489 490 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 491 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 492 if (!maxval || (minval && val < minval->value) || val > maxval->value) 493 return false; 494 495 return true; 496 } 497 498 /** 499 * bond_opt_parse - parse option value 500 * @opt: the option to parse against 501 * @val: value to parse 502 * 503 * This function tries to extract the value from @val and check if it's 504 * a possible match for the option and returns NULL if a match isn't found, 505 * or the struct_opt_value that matched. It also strips the new line from 506 * @val->string if it's present. 507 */ 508 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, 509 struct bond_opt_value *val) 510 { 511 char *p, valstr[BOND_OPT_MAX_NAMELEN + 1] = { 0, }; 512 const struct bond_opt_value *tbl; 513 const struct bond_opt_value *ret = NULL; 514 bool checkval; 515 int i, rv; 516 517 /* No parsing if the option wants a raw val */ 518 if (opt->flags & BOND_OPTFLAG_RAWVAL) 519 return val; 520 521 tbl = opt->values; 522 if (!tbl) 523 goto out; 524 525 /* ULLONG_MAX is used to bypass string processing */ 526 checkval = val->value != ULLONG_MAX; 527 if (!checkval) { 528 if (!val->string) 529 goto out; 530 p = strchr(val->string, '\n'); 531 if (p) 532 *p = '\0'; 533 for (p = val->string; *p; p++) 534 if (!(isdigit(*p) || isspace(*p))) 535 break; 536 /* The following code extracts the string to match or the value 537 * and sets checkval appropriately 538 */ 539 if (*p) { 540 rv = sscanf(val->string, "%32s", valstr); 541 } else { 542 rv = sscanf(val->string, "%llu", &val->value); 543 checkval = true; 544 } 545 if (!rv) 546 goto out; 547 } 548 549 for (i = 0; tbl[i].string; i++) { 550 /* Check for exact match */ 551 if (checkval) { 552 if (val->value == tbl[i].value) 553 ret = &tbl[i]; 554 } else { 555 if (!strcmp(valstr, "default") && 556 (tbl[i].flags & BOND_VALFLAG_DEFAULT)) 557 ret = &tbl[i]; 558 559 if (!strcmp(valstr, tbl[i].string)) 560 ret = &tbl[i]; 561 } 562 /* Found an exact match */ 563 if (ret) 564 goto out; 565 } 566 /* Possible range match */ 567 if (checkval && bond_opt_check_range(opt, val->value)) 568 ret = val; 569 out: 570 return ret; 571 } 572 573 /* Check opt's dependencies against bond mode and currently set options */ 574 static int bond_opt_check_deps(struct bonding *bond, 575 const struct bond_option *opt) 576 { 577 struct bond_params *params = &bond->params; 578 579 if (test_bit(params->mode, &opt->unsuppmodes)) 580 return -EACCES; 581 if ((opt->flags & BOND_OPTFLAG_NOSLAVES) && bond_has_slaves(bond)) 582 return -ENOTEMPTY; 583 if ((opt->flags & BOND_OPTFLAG_IFDOWN) && (bond->dev->flags & IFF_UP)) 584 return -EBUSY; 585 586 return 0; 587 } 588 589 static void bond_opt_dep_print(struct bonding *bond, 590 const struct bond_option *opt) 591 { 592 const struct bond_opt_value *modeval; 593 struct bond_params *params; 594 595 params = &bond->params; 596 modeval = bond_opt_get_val(BOND_OPT_MODE, params->mode); 597 if (test_bit(params->mode, &opt->unsuppmodes)) 598 netdev_err(bond->dev, "option %s: mode dependency failed, not supported in mode %s(%llu)\n", 599 opt->name, modeval->string, modeval->value); 600 } 601 602 static void bond_opt_error_interpret(struct bonding *bond, 603 const struct bond_option *opt, 604 int error, const struct bond_opt_value *val) 605 { 606 const struct bond_opt_value *minval, *maxval; 607 char *p; 608 609 switch (error) { 610 case -EINVAL: 611 if (val) { 612 if (val->string) { 613 /* sometimes RAWVAL opts may have new lines */ 614 p = strchr(val->string, '\n'); 615 if (p) 616 *p = '\0'; 617 netdev_err(bond->dev, "option %s: invalid value (%s)\n", 618 opt->name, val->string); 619 } else { 620 netdev_err(bond->dev, "option %s: invalid value (%llu)\n", 621 opt->name, val->value); 622 } 623 } 624 minval = bond_opt_get_flags(opt, BOND_VALFLAG_MIN); 625 maxval = bond_opt_get_flags(opt, BOND_VALFLAG_MAX); 626 if (!maxval) 627 break; 628 netdev_err(bond->dev, "option %s: allowed values %llu - %llu\n", 629 opt->name, minval ? minval->value : 0, maxval->value); 630 break; 631 case -EACCES: 632 bond_opt_dep_print(bond, opt); 633 break; 634 case -ENOTEMPTY: 635 netdev_err(bond->dev, "option %s: unable to set because the bond device has slaves\n", 636 opt->name); 637 break; 638 case -EBUSY: 639 netdev_err(bond->dev, "option %s: unable to set because the bond device is up\n", 640 opt->name); 641 break; 642 default: 643 break; 644 } 645 } 646 647 /** 648 * __bond_opt_set - set a bonding option 649 * @bond: target bond device 650 * @option: option to set 651 * @val: value to set it to 652 * 653 * This function is used to change the bond's option value, it can be 654 * used for both enabling/changing an option and for disabling it. RTNL lock 655 * must be obtained before calling this function. 656 */ 657 int __bond_opt_set(struct bonding *bond, 658 unsigned int option, struct bond_opt_value *val) 659 { 660 const struct bond_opt_value *retval = NULL; 661 const struct bond_option *opt; 662 int ret = -ENOENT; 663 664 ASSERT_RTNL(); 665 666 opt = bond_opt_get(option); 667 if (WARN_ON(!val) || WARN_ON(!opt)) 668 goto out; 669 ret = bond_opt_check_deps(bond, opt); 670 if (ret) 671 goto out; 672 retval = bond_opt_parse(opt, val); 673 if (!retval) { 674 ret = -EINVAL; 675 goto out; 676 } 677 ret = opt->set(bond, retval); 678 out: 679 if (ret) 680 bond_opt_error_interpret(bond, opt, ret, val); 681 682 return ret; 683 } 684 /** 685 * __bond_opt_set_notify - set a bonding option 686 * @bond: target bond device 687 * @option: option to set 688 * @val: value to set it to 689 * 690 * This function is used to change the bond's option value and trigger 691 * a notification to user sapce. It can be used for both enabling/changing 692 * an option and for disabling it. RTNL lock must be obtained before calling 693 * this function. 694 */ 695 int __bond_opt_set_notify(struct bonding *bond, 696 unsigned int option, struct bond_opt_value *val) 697 { 698 int ret = -ENOENT; 699 700 ASSERT_RTNL(); 701 702 ret = __bond_opt_set(bond, option, val); 703 704 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED)) 705 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev); 706 707 return ret; 708 } 709 710 /** 711 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set 712 * @bond: target bond device 713 * @option: option to set 714 * @buf: value to set it to 715 * 716 * This function tries to acquire RTNL without blocking and if successful 717 * calls __bond_opt_set. It is mainly used for sysfs option manipulation. 718 */ 719 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) 720 { 721 struct bond_opt_value optval; 722 int ret; 723 724 if (!rtnl_trylock()) 725 return restart_syscall(); 726 bond_opt_initstr(&optval, buf); 727 ret = __bond_opt_set_notify(bond, option, &optval); 728 rtnl_unlock(); 729 730 return ret; 731 } 732 733 /** 734 * bond_opt_get - get a pointer to an option 735 * @option: option for which to return a pointer 736 * 737 * This function checks if option is valid and if so returns a pointer 738 * to its entry in the bond_opts[] option array. 739 */ 740 const struct bond_option *bond_opt_get(unsigned int option) 741 { 742 if (!BOND_OPT_VALID(option)) 743 return NULL; 744 745 return &bond_opts[option]; 746 } 747 748 static int bond_option_mode_set(struct bonding *bond, 749 const struct bond_opt_value *newval) 750 { 751 if (!bond_mode_uses_arp(newval->value)) { 752 if (bond->params.arp_interval) { 753 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", 754 newval->string); 755 /* disable arp monitoring */ 756 bond->params.arp_interval = 0; 757 } 758 759 if (!bond->params.miimon) { 760 /* set miimon to default value */ 761 bond->params.miimon = BOND_DEFAULT_MIIMON; 762 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", 763 bond->params.miimon); 764 } 765 } 766 767 if (newval->value == BOND_MODE_ALB) 768 bond->params.tlb_dynamic_lb = 1; 769 770 #ifdef CONFIG_XFRM_OFFLOAD 771 if (newval->value == BOND_MODE_ACTIVEBACKUP) 772 bond->dev->wanted_features |= BOND_XFRM_FEATURES; 773 else 774 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES; 775 netdev_change_features(bond->dev); 776 #endif /* CONFIG_XFRM_OFFLOAD */ 777 778 /* don't cache arp_validate between modes */ 779 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 780 bond->params.mode = newval->value; 781 782 return 0; 783 } 784 785 static int bond_option_active_slave_set(struct bonding *bond, 786 const struct bond_opt_value *newval) 787 { 788 char ifname[IFNAMSIZ] = { 0, }; 789 struct net_device *slave_dev; 790 int ret = 0; 791 792 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ 793 if (!strlen(ifname) || newval->string[0] == '\n') { 794 slave_dev = NULL; 795 } else { 796 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); 797 if (!slave_dev) 798 return -ENODEV; 799 } 800 801 if (slave_dev) { 802 if (!netif_is_bond_slave(slave_dev)) { 803 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n"); 804 return -EINVAL; 805 } 806 807 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { 808 slave_err(bond->dev, slave_dev, "Device is not our slave\n"); 809 return -EINVAL; 810 } 811 } 812 813 block_netpoll_tx(); 814 /* check to see if we are clearing active */ 815 if (!slave_dev) { 816 netdev_dbg(bond->dev, "Clearing current active slave\n"); 817 RCU_INIT_POINTER(bond->curr_active_slave, NULL); 818 bond_select_active_slave(bond); 819 } else { 820 struct slave *old_active = rtnl_dereference(bond->curr_active_slave); 821 struct slave *new_active = bond_slave_get_rtnl(slave_dev); 822 823 BUG_ON(!new_active); 824 825 if (new_active == old_active) { 826 /* do nothing */ 827 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n"); 828 } else { 829 if (old_active && (new_active->link == BOND_LINK_UP) && 830 bond_slave_is_up(new_active)) { 831 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n"); 832 bond_change_active_slave(bond, new_active); 833 } else { 834 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n", 835 new_active->dev->name); 836 ret = -EINVAL; 837 } 838 } 839 } 840 unblock_netpoll_tx(); 841 842 return ret; 843 } 844 845 /* There are two tricky bits here. First, if MII monitoring is activated, then 846 * we must disable ARP monitoring. Second, if the timer isn't running, we must 847 * start it. 848 */ 849 static int bond_option_miimon_set(struct bonding *bond, 850 const struct bond_opt_value *newval) 851 { 852 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n", 853 newval->value); 854 bond->params.miimon = newval->value; 855 if (bond->params.updelay) 856 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", 857 bond->params.updelay * bond->params.miimon); 858 if (bond->params.downdelay) 859 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", 860 bond->params.downdelay * bond->params.miimon); 861 if (bond->params.peer_notif_delay) 862 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n", 863 bond->params.peer_notif_delay * bond->params.miimon); 864 if (newval->value && bond->params.arp_interval) { 865 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n"); 866 bond->params.arp_interval = 0; 867 if (bond->params.arp_validate) 868 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 869 } 870 if (bond->dev->flags & IFF_UP) { 871 /* If the interface is up, we may need to fire off 872 * the MII timer. If the interface is down, the 873 * timer will get fired off when the open function 874 * is called. 875 */ 876 if (!newval->value) { 877 cancel_delayed_work_sync(&bond->mii_work); 878 } else { 879 cancel_delayed_work_sync(&bond->arp_work); 880 queue_delayed_work(bond->wq, &bond->mii_work, 0); 881 } 882 } 883 884 return 0; 885 } 886 887 /* Set up, down and peer notification delays. These must be multiples 888 * of the MII monitoring value, and are stored internally as the 889 * multiplier. Thus, we must translate to MS for the real world. 890 */ 891 static int _bond_option_delay_set(struct bonding *bond, 892 const struct bond_opt_value *newval, 893 const char *name, 894 int *target) 895 { 896 int value = newval->value; 897 898 if (!bond->params.miimon) { 899 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n", 900 name); 901 return -EPERM; 902 } 903 if ((value % bond->params.miimon) != 0) { 904 netdev_warn(bond->dev, 905 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n", 906 name, 907 value, bond->params.miimon, 908 (value / bond->params.miimon) * 909 bond->params.miimon); 910 } 911 *target = value / bond->params.miimon; 912 netdev_dbg(bond->dev, "Setting %s to %d\n", 913 name, 914 *target * bond->params.miimon); 915 916 return 0; 917 } 918 919 static int bond_option_updelay_set(struct bonding *bond, 920 const struct bond_opt_value *newval) 921 { 922 return _bond_option_delay_set(bond, newval, "up delay", 923 &bond->params.updelay); 924 } 925 926 static int bond_option_downdelay_set(struct bonding *bond, 927 const struct bond_opt_value *newval) 928 { 929 return _bond_option_delay_set(bond, newval, "down delay", 930 &bond->params.downdelay); 931 } 932 933 static int bond_option_peer_notif_delay_set(struct bonding *bond, 934 const struct bond_opt_value *newval) 935 { 936 int ret = _bond_option_delay_set(bond, newval, 937 "peer notification delay", 938 &bond->params.peer_notif_delay); 939 return ret; 940 } 941 942 static int bond_option_use_carrier_set(struct bonding *bond, 943 const struct bond_opt_value *newval) 944 { 945 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n", 946 newval->value); 947 bond->params.use_carrier = newval->value; 948 949 return 0; 950 } 951 952 /* There are two tricky bits here. First, if ARP monitoring is activated, then 953 * we must disable MII monitoring. Second, if the ARP timer isn't running, 954 * we must start it. 955 */ 956 static int bond_option_arp_interval_set(struct bonding *bond, 957 const struct bond_opt_value *newval) 958 { 959 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n", 960 newval->value); 961 bond->params.arp_interval = newval->value; 962 if (newval->value) { 963 if (bond->params.miimon) { 964 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n"); 965 bond->params.miimon = 0; 966 } 967 if (!bond->params.arp_targets[0]) 968 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n"); 969 } 970 if (bond->dev->flags & IFF_UP) { 971 /* If the interface is up, we may need to fire off 972 * the ARP timer. If the interface is down, the 973 * timer will get fired off when the open function 974 * is called. 975 */ 976 if (!newval->value) { 977 if (bond->params.arp_validate) 978 bond->recv_probe = NULL; 979 cancel_delayed_work_sync(&bond->arp_work); 980 } else { 981 /* arp_validate can be set only in active-backup mode */ 982 bond->recv_probe = bond_arp_rcv; 983 cancel_delayed_work_sync(&bond->mii_work); 984 queue_delayed_work(bond->wq, &bond->arp_work, 0); 985 } 986 } 987 988 return 0; 989 } 990 991 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, 992 __be32 target, 993 unsigned long last_rx) 994 { 995 __be32 *targets = bond->params.arp_targets; 996 struct list_head *iter; 997 struct slave *slave; 998 999 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { 1000 bond_for_each_slave(bond, slave, iter) 1001 slave->target_last_arp_rx[slot] = last_rx; 1002 targets[slot] = target; 1003 } 1004 } 1005 1006 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1007 { 1008 __be32 *targets = bond->params.arp_targets; 1009 int ind; 1010 1011 if (!bond_is_ip_target_ok(target)) { 1012 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n", 1013 &target); 1014 return -EINVAL; 1015 } 1016 1017 if (bond_get_targets_ip(targets, target) != -1) { /* dup */ 1018 netdev_err(bond->dev, "ARP target %pI4 is already present\n", 1019 &target); 1020 return -EINVAL; 1021 } 1022 1023 ind = bond_get_targets_ip(targets, 0); /* first free slot */ 1024 if (ind == -1) { 1025 netdev_err(bond->dev, "ARP target table is full!\n"); 1026 return -EINVAL; 1027 } 1028 1029 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target); 1030 1031 _bond_options_arp_ip_target_set(bond, ind, target, jiffies); 1032 1033 return 0; 1034 } 1035 1036 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1037 { 1038 return _bond_option_arp_ip_target_add(bond, target); 1039 } 1040 1041 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) 1042 { 1043 __be32 *targets = bond->params.arp_targets; 1044 struct list_head *iter; 1045 struct slave *slave; 1046 unsigned long *targets_rx; 1047 int ind, i; 1048 1049 if (!bond_is_ip_target_ok(target)) { 1050 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n", 1051 &target); 1052 return -EINVAL; 1053 } 1054 1055 ind = bond_get_targets_ip(targets, target); 1056 if (ind == -1) { 1057 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n", 1058 &target); 1059 return -EINVAL; 1060 } 1061 1062 if (ind == 0 && !targets[1] && bond->params.arp_interval) 1063 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); 1064 1065 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target); 1066 1067 bond_for_each_slave(bond, slave, iter) { 1068 targets_rx = slave->target_last_arp_rx; 1069 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1070 targets_rx[i] = targets_rx[i+1]; 1071 targets_rx[i] = 0; 1072 } 1073 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1074 targets[i] = targets[i+1]; 1075 targets[i] = 0; 1076 1077 return 0; 1078 } 1079 1080 void bond_option_arp_ip_targets_clear(struct bonding *bond) 1081 { 1082 int i; 1083 1084 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 1085 _bond_options_arp_ip_target_set(bond, i, 0, 0); 1086 } 1087 1088 static int bond_option_arp_ip_targets_set(struct bonding *bond, 1089 const struct bond_opt_value *newval) 1090 { 1091 int ret = -EPERM; 1092 __be32 target; 1093 1094 if (newval->string) { 1095 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) { 1096 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n", 1097 &target); 1098 return ret; 1099 } 1100 if (newval->string[0] == '+') 1101 ret = bond_option_arp_ip_target_add(bond, target); 1102 else if (newval->string[0] == '-') 1103 ret = bond_option_arp_ip_target_rem(bond, target); 1104 else 1105 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n"); 1106 } else { 1107 target = newval->value; 1108 ret = bond_option_arp_ip_target_add(bond, target); 1109 } 1110 1111 return ret; 1112 } 1113 1114 static int bond_option_arp_validate_set(struct bonding *bond, 1115 const struct bond_opt_value *newval) 1116 { 1117 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n", 1118 newval->string, newval->value); 1119 bond->params.arp_validate = newval->value; 1120 1121 return 0; 1122 } 1123 1124 static int bond_option_arp_all_targets_set(struct bonding *bond, 1125 const struct bond_opt_value *newval) 1126 { 1127 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n", 1128 newval->string, newval->value); 1129 bond->params.arp_all_targets = newval->value; 1130 1131 return 0; 1132 } 1133 1134 static int bond_option_primary_set(struct bonding *bond, 1135 const struct bond_opt_value *newval) 1136 { 1137 char *p, *primary = newval->string; 1138 struct list_head *iter; 1139 struct slave *slave; 1140 1141 block_netpoll_tx(); 1142 1143 p = strchr(primary, '\n'); 1144 if (p) 1145 *p = '\0'; 1146 /* check to see if we are clearing primary */ 1147 if (!strlen(primary)) { 1148 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1149 RCU_INIT_POINTER(bond->primary_slave, NULL); 1150 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1151 bond_select_active_slave(bond); 1152 goto out; 1153 } 1154 1155 bond_for_each_slave(bond, slave, iter) { 1156 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1157 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); 1158 rcu_assign_pointer(bond->primary_slave, slave); 1159 strcpy(bond->params.primary, slave->dev->name); 1160 bond->force_primary = true; 1161 bond_select_active_slave(bond); 1162 goto out; 1163 } 1164 } 1165 1166 if (rtnl_dereference(bond->primary_slave)) { 1167 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1168 RCU_INIT_POINTER(bond->primary_slave, NULL); 1169 bond_select_active_slave(bond); 1170 } 1171 strncpy(bond->params.primary, primary, IFNAMSIZ); 1172 bond->params.primary[IFNAMSIZ - 1] = 0; 1173 1174 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", 1175 primary); 1176 1177 out: 1178 unblock_netpoll_tx(); 1179 1180 return 0; 1181 } 1182 1183 static int bond_option_primary_reselect_set(struct bonding *bond, 1184 const struct bond_opt_value *newval) 1185 { 1186 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", 1187 newval->string, newval->value); 1188 bond->params.primary_reselect = newval->value; 1189 1190 block_netpoll_tx(); 1191 bond_select_active_slave(bond); 1192 unblock_netpoll_tx(); 1193 1194 return 0; 1195 } 1196 1197 static int bond_option_fail_over_mac_set(struct bonding *bond, 1198 const struct bond_opt_value *newval) 1199 { 1200 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", 1201 newval->string, newval->value); 1202 bond->params.fail_over_mac = newval->value; 1203 1204 return 0; 1205 } 1206 1207 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1208 const struct bond_opt_value *newval) 1209 { 1210 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", 1211 newval->string, newval->value); 1212 bond->params.xmit_policy = newval->value; 1213 1214 return 0; 1215 } 1216 1217 static int bond_option_resend_igmp_set(struct bonding *bond, 1218 const struct bond_opt_value *newval) 1219 { 1220 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", 1221 newval->value); 1222 bond->params.resend_igmp = newval->value; 1223 1224 return 0; 1225 } 1226 1227 static int bond_option_num_peer_notif_set(struct bonding *bond, 1228 const struct bond_opt_value *newval) 1229 { 1230 bond->params.num_peer_notif = newval->value; 1231 1232 return 0; 1233 } 1234 1235 static int bond_option_all_slaves_active_set(struct bonding *bond, 1236 const struct bond_opt_value *newval) 1237 { 1238 struct list_head *iter; 1239 struct slave *slave; 1240 1241 if (newval->value == bond->params.all_slaves_active) 1242 return 0; 1243 bond->params.all_slaves_active = newval->value; 1244 bond_for_each_slave(bond, slave, iter) { 1245 if (!bond_is_active_slave(slave)) { 1246 if (newval->value) 1247 slave->inactive = 0; 1248 else 1249 slave->inactive = 1; 1250 } 1251 } 1252 1253 return 0; 1254 } 1255 1256 static int bond_option_min_links_set(struct bonding *bond, 1257 const struct bond_opt_value *newval) 1258 { 1259 netdev_dbg(bond->dev, "Setting min links value to %llu\n", 1260 newval->value); 1261 bond->params.min_links = newval->value; 1262 bond_set_carrier(bond); 1263 1264 return 0; 1265 } 1266 1267 static int bond_option_lp_interval_set(struct bonding *bond, 1268 const struct bond_opt_value *newval) 1269 { 1270 bond->params.lp_interval = newval->value; 1271 1272 return 0; 1273 } 1274 1275 static int bond_option_pps_set(struct bonding *bond, 1276 const struct bond_opt_value *newval) 1277 { 1278 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", 1279 newval->value); 1280 bond->params.packets_per_slave = newval->value; 1281 if (newval->value > 0) { 1282 bond->params.reciprocal_packets_per_slave = 1283 reciprocal_value(newval->value); 1284 } else { 1285 /* reciprocal_packets_per_slave is unused if 1286 * packets_per_slave is 0 or 1, just initialize it 1287 */ 1288 bond->params.reciprocal_packets_per_slave = 1289 (struct reciprocal_value) { 0 }; 1290 } 1291 1292 return 0; 1293 } 1294 1295 static int bond_option_lacp_rate_set(struct bonding *bond, 1296 const struct bond_opt_value *newval) 1297 { 1298 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", 1299 newval->string, newval->value); 1300 bond->params.lacp_fast = newval->value; 1301 bond_3ad_update_lacp_rate(bond); 1302 1303 return 0; 1304 } 1305 1306 static int bond_option_ad_select_set(struct bonding *bond, 1307 const struct bond_opt_value *newval) 1308 { 1309 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", 1310 newval->string, newval->value); 1311 bond->params.ad_select = newval->value; 1312 1313 return 0; 1314 } 1315 1316 static int bond_option_queue_id_set(struct bonding *bond, 1317 const struct bond_opt_value *newval) 1318 { 1319 struct slave *slave, *update_slave; 1320 struct net_device *sdev; 1321 struct list_head *iter; 1322 char *delim; 1323 int ret = 0; 1324 u16 qid; 1325 1326 /* delim will point to queue id if successful */ 1327 delim = strchr(newval->string, ':'); 1328 if (!delim) 1329 goto err_no_cmd; 1330 1331 /* Terminate string that points to device name and bump it 1332 * up one, so we can read the queue id there. 1333 */ 1334 *delim = '\0'; 1335 if (sscanf(++delim, "%hd\n", &qid) != 1) 1336 goto err_no_cmd; 1337 1338 /* Check buffer length, valid ifname and queue id */ 1339 if (!dev_valid_name(newval->string) || 1340 qid > bond->dev->real_num_tx_queues) 1341 goto err_no_cmd; 1342 1343 /* Get the pointer to that interface if it exists */ 1344 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1345 if (!sdev) 1346 goto err_no_cmd; 1347 1348 /* Search for thes slave and check for duplicate qids */ 1349 update_slave = NULL; 1350 bond_for_each_slave(bond, slave, iter) { 1351 if (sdev == slave->dev) 1352 /* We don't need to check the matching 1353 * slave for dups, since we're overwriting it 1354 */ 1355 update_slave = slave; 1356 else if (qid && qid == slave->queue_id) { 1357 goto err_no_cmd; 1358 } 1359 } 1360 1361 if (!update_slave) 1362 goto err_no_cmd; 1363 1364 /* Actually set the qids for the slave */ 1365 update_slave->queue_id = qid; 1366 1367 out: 1368 return ret; 1369 1370 err_no_cmd: 1371 netdev_dbg(bond->dev, "invalid input for queue_id set\n"); 1372 ret = -EPERM; 1373 goto out; 1374 1375 } 1376 1377 static int bond_option_slaves_set(struct bonding *bond, 1378 const struct bond_opt_value *newval) 1379 { 1380 char command[IFNAMSIZ + 1] = { 0, }; 1381 struct net_device *dev; 1382 char *ifname; 1383 int ret; 1384 1385 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1386 ifname = command + 1; 1387 if ((strlen(command) <= 1) || 1388 (command[0] != '+' && command[0] != '-') || 1389 !dev_valid_name(ifname)) 1390 goto err_no_cmd; 1391 1392 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1393 if (!dev) { 1394 netdev_dbg(bond->dev, "interface %s does not exist!\n", 1395 ifname); 1396 ret = -ENODEV; 1397 goto out; 1398 } 1399 1400 switch (command[0]) { 1401 case '+': 1402 slave_dbg(bond->dev, dev, "Enslaving interface\n"); 1403 ret = bond_enslave(bond->dev, dev, NULL); 1404 break; 1405 1406 case '-': 1407 slave_dbg(bond->dev, dev, "Releasing interface\n"); 1408 ret = bond_release(bond->dev, dev); 1409 break; 1410 1411 default: 1412 /* should not run here. */ 1413 goto err_no_cmd; 1414 } 1415 1416 out: 1417 return ret; 1418 1419 err_no_cmd: 1420 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); 1421 ret = -EPERM; 1422 goto out; 1423 } 1424 1425 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1426 const struct bond_opt_value *newval) 1427 { 1428 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", 1429 newval->string, newval->value); 1430 bond->params.tlb_dynamic_lb = newval->value; 1431 1432 return 0; 1433 } 1434 1435 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 1436 const struct bond_opt_value *newval) 1437 { 1438 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", 1439 newval->value); 1440 1441 bond->params.ad_actor_sys_prio = newval->value; 1442 bond_3ad_update_ad_actor_settings(bond); 1443 1444 return 0; 1445 } 1446 1447 static int bond_option_ad_actor_system_set(struct bonding *bond, 1448 const struct bond_opt_value *newval) 1449 { 1450 u8 macaddr[ETH_ALEN]; 1451 u8 *mac; 1452 1453 if (newval->string) { 1454 if (!mac_pton(newval->string, macaddr)) 1455 goto err; 1456 mac = macaddr; 1457 } else { 1458 mac = (u8 *)&newval->value; 1459 } 1460 1461 if (!is_valid_ether_addr(mac)) 1462 goto err; 1463 1464 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); 1465 ether_addr_copy(bond->params.ad_actor_system, mac); 1466 bond_3ad_update_ad_actor_settings(bond); 1467 1468 return 0; 1469 1470 err: 1471 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); 1472 return -EINVAL; 1473 } 1474 1475 static int bond_option_ad_user_port_key_set(struct bonding *bond, 1476 const struct bond_opt_value *newval) 1477 { 1478 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", 1479 newval->value); 1480 1481 bond->params.ad_user_port_key = newval->value; 1482 return 0; 1483 } 1484