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