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 case -ENODEV: 644 if (val && val->string) { 645 p = strchr(val->string, '\n'); 646 if (p) 647 *p = '\0'; 648 netdev_err(bond->dev, "option %s: interface %s does not exist!\n", 649 opt->name, val->string); 650 } 651 break; 652 default: 653 break; 654 } 655 } 656 657 /** 658 * __bond_opt_set - set a bonding option 659 * @bond: target bond device 660 * @option: option to set 661 * @val: value to set it to 662 * 663 * This function is used to change the bond's option value, it can be 664 * used for both enabling/changing an option and for disabling it. RTNL lock 665 * must be obtained before calling this function. 666 */ 667 int __bond_opt_set(struct bonding *bond, 668 unsigned int option, struct bond_opt_value *val) 669 { 670 const struct bond_opt_value *retval = NULL; 671 const struct bond_option *opt; 672 int ret = -ENOENT; 673 674 ASSERT_RTNL(); 675 676 opt = bond_opt_get(option); 677 if (WARN_ON(!val) || WARN_ON(!opt)) 678 goto out; 679 ret = bond_opt_check_deps(bond, opt); 680 if (ret) 681 goto out; 682 retval = bond_opt_parse(opt, val); 683 if (!retval) { 684 ret = -EINVAL; 685 goto out; 686 } 687 ret = opt->set(bond, retval); 688 out: 689 if (ret) 690 bond_opt_error_interpret(bond, opt, ret, val); 691 692 return ret; 693 } 694 /** 695 * __bond_opt_set_notify - set a bonding option 696 * @bond: target bond device 697 * @option: option to set 698 * @val: value to set it to 699 * 700 * This function is used to change the bond's option value and trigger 701 * a notification to user sapce. It can be used for both enabling/changing 702 * an option and for disabling it. RTNL lock must be obtained before calling 703 * this function. 704 */ 705 int __bond_opt_set_notify(struct bonding *bond, 706 unsigned int option, struct bond_opt_value *val) 707 { 708 int ret; 709 710 ASSERT_RTNL(); 711 712 ret = __bond_opt_set(bond, option, val); 713 714 if (!ret && (bond->dev->reg_state == NETREG_REGISTERED)) 715 call_netdevice_notifiers(NETDEV_CHANGEINFODATA, bond->dev); 716 717 return ret; 718 } 719 720 /** 721 * bond_opt_tryset_rtnl - try to acquire rtnl and call __bond_opt_set 722 * @bond: target bond device 723 * @option: option to set 724 * @buf: value to set it to 725 * 726 * This function tries to acquire RTNL without blocking and if successful 727 * calls __bond_opt_set. It is mainly used for sysfs option manipulation. 728 */ 729 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf) 730 { 731 struct bond_opt_value optval; 732 int ret; 733 734 if (!rtnl_trylock()) 735 return restart_syscall(); 736 bond_opt_initstr(&optval, buf); 737 ret = __bond_opt_set_notify(bond, option, &optval); 738 rtnl_unlock(); 739 740 return ret; 741 } 742 743 /** 744 * bond_opt_get - get a pointer to an option 745 * @option: option for which to return a pointer 746 * 747 * This function checks if option is valid and if so returns a pointer 748 * to its entry in the bond_opts[] option array. 749 */ 750 const struct bond_option *bond_opt_get(unsigned int option) 751 { 752 if (!BOND_OPT_VALID(option)) 753 return NULL; 754 755 return &bond_opts[option]; 756 } 757 758 static bool bond_set_xfrm_features(struct bonding *bond) 759 { 760 if (!IS_ENABLED(CONFIG_XFRM_OFFLOAD)) 761 return false; 762 763 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) 764 bond->dev->wanted_features |= BOND_XFRM_FEATURES; 765 else 766 bond->dev->wanted_features &= ~BOND_XFRM_FEATURES; 767 768 return true; 769 } 770 771 static bool bond_set_tls_features(struct bonding *bond) 772 { 773 if (!IS_ENABLED(CONFIG_TLS_DEVICE)) 774 return false; 775 776 if (bond_sk_check(bond)) 777 bond->dev->wanted_features |= BOND_TLS_FEATURES; 778 else 779 bond->dev->wanted_features &= ~BOND_TLS_FEATURES; 780 781 return true; 782 } 783 784 static int bond_option_mode_set(struct bonding *bond, 785 const struct bond_opt_value *newval) 786 { 787 if (!bond_mode_uses_arp(newval->value)) { 788 if (bond->params.arp_interval) { 789 netdev_dbg(bond->dev, "%s mode is incompatible with arp monitoring, start mii monitoring\n", 790 newval->string); 791 /* disable arp monitoring */ 792 bond->params.arp_interval = 0; 793 } 794 795 if (!bond->params.miimon) { 796 /* set miimon to default value */ 797 bond->params.miimon = BOND_DEFAULT_MIIMON; 798 netdev_dbg(bond->dev, "Setting MII monitoring interval to %d\n", 799 bond->params.miimon); 800 } 801 } 802 803 if (newval->value == BOND_MODE_ALB) 804 bond->params.tlb_dynamic_lb = 1; 805 806 /* don't cache arp_validate between modes */ 807 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 808 bond->params.mode = newval->value; 809 810 if (bond->dev->reg_state == NETREG_REGISTERED) { 811 bool update = false; 812 813 update |= bond_set_xfrm_features(bond); 814 update |= bond_set_tls_features(bond); 815 816 if (update) 817 netdev_update_features(bond->dev); 818 } 819 820 return 0; 821 } 822 823 static int bond_option_active_slave_set(struct bonding *bond, 824 const struct bond_opt_value *newval) 825 { 826 char ifname[IFNAMSIZ] = { 0, }; 827 struct net_device *slave_dev; 828 int ret = 0; 829 830 sscanf(newval->string, "%15s", ifname); /* IFNAMSIZ */ 831 if (!strlen(ifname) || newval->string[0] == '\n') { 832 slave_dev = NULL; 833 } else { 834 slave_dev = __dev_get_by_name(dev_net(bond->dev), ifname); 835 if (!slave_dev) 836 return -ENODEV; 837 } 838 839 if (slave_dev) { 840 if (!netif_is_bond_slave(slave_dev)) { 841 slave_err(bond->dev, slave_dev, "Device is not bonding slave\n"); 842 return -EINVAL; 843 } 844 845 if (bond->dev != netdev_master_upper_dev_get(slave_dev)) { 846 slave_err(bond->dev, slave_dev, "Device is not our slave\n"); 847 return -EINVAL; 848 } 849 } 850 851 block_netpoll_tx(); 852 /* check to see if we are clearing active */ 853 if (!slave_dev) { 854 netdev_dbg(bond->dev, "Clearing current active slave\n"); 855 RCU_INIT_POINTER(bond->curr_active_slave, NULL); 856 bond_select_active_slave(bond); 857 } else { 858 struct slave *old_active = rtnl_dereference(bond->curr_active_slave); 859 struct slave *new_active = bond_slave_get_rtnl(slave_dev); 860 861 BUG_ON(!new_active); 862 863 if (new_active == old_active) { 864 /* do nothing */ 865 slave_dbg(bond->dev, new_active->dev, "is already the current active slave\n"); 866 } else { 867 if (old_active && (new_active->link == BOND_LINK_UP) && 868 bond_slave_is_up(new_active)) { 869 slave_dbg(bond->dev, new_active->dev, "Setting as active slave\n"); 870 bond_change_active_slave(bond, new_active); 871 } else { 872 slave_err(bond->dev, new_active->dev, "Could not set as active slave; either %s is down or the link is down\n", 873 new_active->dev->name); 874 ret = -EINVAL; 875 } 876 } 877 } 878 unblock_netpoll_tx(); 879 880 return ret; 881 } 882 883 /* There are two tricky bits here. First, if MII monitoring is activated, then 884 * we must disable ARP monitoring. Second, if the timer isn't running, we must 885 * start it. 886 */ 887 static int bond_option_miimon_set(struct bonding *bond, 888 const struct bond_opt_value *newval) 889 { 890 netdev_dbg(bond->dev, "Setting MII monitoring interval to %llu\n", 891 newval->value); 892 bond->params.miimon = newval->value; 893 if (bond->params.updelay) 894 netdev_dbg(bond->dev, "Note: Updating updelay (to %d) since it is a multiple of the miimon value\n", 895 bond->params.updelay * bond->params.miimon); 896 if (bond->params.downdelay) 897 netdev_dbg(bond->dev, "Note: Updating downdelay (to %d) since it is a multiple of the miimon value\n", 898 bond->params.downdelay * bond->params.miimon); 899 if (bond->params.peer_notif_delay) 900 netdev_dbg(bond->dev, "Note: Updating peer_notif_delay (to %d) since it is a multiple of the miimon value\n", 901 bond->params.peer_notif_delay * bond->params.miimon); 902 if (newval->value && bond->params.arp_interval) { 903 netdev_dbg(bond->dev, "MII monitoring cannot be used with ARP monitoring - disabling ARP monitoring...\n"); 904 bond->params.arp_interval = 0; 905 if (bond->params.arp_validate) 906 bond->params.arp_validate = BOND_ARP_VALIDATE_NONE; 907 } 908 if (bond->dev->flags & IFF_UP) { 909 /* If the interface is up, we may need to fire off 910 * the MII timer. If the interface is down, the 911 * timer will get fired off when the open function 912 * is called. 913 */ 914 if (!newval->value) { 915 cancel_delayed_work_sync(&bond->mii_work); 916 } else { 917 cancel_delayed_work_sync(&bond->arp_work); 918 queue_delayed_work(bond->wq, &bond->mii_work, 0); 919 } 920 } 921 922 return 0; 923 } 924 925 /* Set up, down and peer notification delays. These must be multiples 926 * of the MII monitoring value, and are stored internally as the 927 * multiplier. Thus, we must translate to MS for the real world. 928 */ 929 static int _bond_option_delay_set(struct bonding *bond, 930 const struct bond_opt_value *newval, 931 const char *name, 932 int *target) 933 { 934 int value = newval->value; 935 936 if (!bond->params.miimon) { 937 netdev_err(bond->dev, "Unable to set %s as MII monitoring is disabled\n", 938 name); 939 return -EPERM; 940 } 941 if ((value % bond->params.miimon) != 0) { 942 netdev_warn(bond->dev, 943 "%s (%d) is not a multiple of miimon (%d), value rounded to %d ms\n", 944 name, 945 value, bond->params.miimon, 946 (value / bond->params.miimon) * 947 bond->params.miimon); 948 } 949 *target = value / bond->params.miimon; 950 netdev_dbg(bond->dev, "Setting %s to %d\n", 951 name, 952 *target * bond->params.miimon); 953 954 return 0; 955 } 956 957 static int bond_option_updelay_set(struct bonding *bond, 958 const struct bond_opt_value *newval) 959 { 960 return _bond_option_delay_set(bond, newval, "up delay", 961 &bond->params.updelay); 962 } 963 964 static int bond_option_downdelay_set(struct bonding *bond, 965 const struct bond_opt_value *newval) 966 { 967 return _bond_option_delay_set(bond, newval, "down delay", 968 &bond->params.downdelay); 969 } 970 971 static int bond_option_peer_notif_delay_set(struct bonding *bond, 972 const struct bond_opt_value *newval) 973 { 974 int ret = _bond_option_delay_set(bond, newval, 975 "peer notification delay", 976 &bond->params.peer_notif_delay); 977 return ret; 978 } 979 980 static int bond_option_use_carrier_set(struct bonding *bond, 981 const struct bond_opt_value *newval) 982 { 983 netdev_dbg(bond->dev, "Setting use_carrier to %llu\n", 984 newval->value); 985 bond->params.use_carrier = newval->value; 986 987 return 0; 988 } 989 990 /* There are two tricky bits here. First, if ARP monitoring is activated, then 991 * we must disable MII monitoring. Second, if the ARP timer isn't running, 992 * we must start it. 993 */ 994 static int bond_option_arp_interval_set(struct bonding *bond, 995 const struct bond_opt_value *newval) 996 { 997 netdev_dbg(bond->dev, "Setting ARP monitoring interval to %llu\n", 998 newval->value); 999 bond->params.arp_interval = newval->value; 1000 if (newval->value) { 1001 if (bond->params.miimon) { 1002 netdev_dbg(bond->dev, "ARP monitoring cannot be used with MII monitoring. Disabling MII monitoring\n"); 1003 bond->params.miimon = 0; 1004 } 1005 if (!bond->params.arp_targets[0]) 1006 netdev_dbg(bond->dev, "ARP monitoring has been set up, but no ARP targets have been specified\n"); 1007 } 1008 if (bond->dev->flags & IFF_UP) { 1009 /* If the interface is up, we may need to fire off 1010 * the ARP timer. If the interface is down, the 1011 * timer will get fired off when the open function 1012 * is called. 1013 */ 1014 if (!newval->value) { 1015 if (bond->params.arp_validate) 1016 bond->recv_probe = NULL; 1017 cancel_delayed_work_sync(&bond->arp_work); 1018 } else { 1019 /* arp_validate can be set only in active-backup mode */ 1020 bond->recv_probe = bond_arp_rcv; 1021 cancel_delayed_work_sync(&bond->mii_work); 1022 queue_delayed_work(bond->wq, &bond->arp_work, 0); 1023 } 1024 } 1025 1026 return 0; 1027 } 1028 1029 static void _bond_options_arp_ip_target_set(struct bonding *bond, int slot, 1030 __be32 target, 1031 unsigned long last_rx) 1032 { 1033 __be32 *targets = bond->params.arp_targets; 1034 struct list_head *iter; 1035 struct slave *slave; 1036 1037 if (slot >= 0 && slot < BOND_MAX_ARP_TARGETS) { 1038 bond_for_each_slave(bond, slave, iter) 1039 slave->target_last_arp_rx[slot] = last_rx; 1040 targets[slot] = target; 1041 } 1042 } 1043 1044 static int _bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1045 { 1046 __be32 *targets = bond->params.arp_targets; 1047 int ind; 1048 1049 if (!bond_is_ip_target_ok(target)) { 1050 netdev_err(bond->dev, "invalid ARP target %pI4 specified for addition\n", 1051 &target); 1052 return -EINVAL; 1053 } 1054 1055 if (bond_get_targets_ip(targets, target) != -1) { /* dup */ 1056 netdev_err(bond->dev, "ARP target %pI4 is already present\n", 1057 &target); 1058 return -EINVAL; 1059 } 1060 1061 ind = bond_get_targets_ip(targets, 0); /* first free slot */ 1062 if (ind == -1) { 1063 netdev_err(bond->dev, "ARP target table is full!\n"); 1064 return -EINVAL; 1065 } 1066 1067 netdev_dbg(bond->dev, "Adding ARP target %pI4\n", &target); 1068 1069 _bond_options_arp_ip_target_set(bond, ind, target, jiffies); 1070 1071 return 0; 1072 } 1073 1074 static int bond_option_arp_ip_target_add(struct bonding *bond, __be32 target) 1075 { 1076 return _bond_option_arp_ip_target_add(bond, target); 1077 } 1078 1079 static int bond_option_arp_ip_target_rem(struct bonding *bond, __be32 target) 1080 { 1081 __be32 *targets = bond->params.arp_targets; 1082 struct list_head *iter; 1083 struct slave *slave; 1084 unsigned long *targets_rx; 1085 int ind, i; 1086 1087 if (!bond_is_ip_target_ok(target)) { 1088 netdev_err(bond->dev, "invalid ARP target %pI4 specified for removal\n", 1089 &target); 1090 return -EINVAL; 1091 } 1092 1093 ind = bond_get_targets_ip(targets, target); 1094 if (ind == -1) { 1095 netdev_err(bond->dev, "unable to remove nonexistent ARP target %pI4\n", 1096 &target); 1097 return -EINVAL; 1098 } 1099 1100 if (ind == 0 && !targets[1] && bond->params.arp_interval) 1101 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); 1102 1103 netdev_dbg(bond->dev, "Removing ARP target %pI4\n", &target); 1104 1105 bond_for_each_slave(bond, slave, iter) { 1106 targets_rx = slave->target_last_arp_rx; 1107 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1108 targets_rx[i] = targets_rx[i+1]; 1109 targets_rx[i] = 0; 1110 } 1111 for (i = ind; (i < BOND_MAX_ARP_TARGETS-1) && targets[i+1]; i++) 1112 targets[i] = targets[i+1]; 1113 targets[i] = 0; 1114 1115 return 0; 1116 } 1117 1118 void bond_option_arp_ip_targets_clear(struct bonding *bond) 1119 { 1120 int i; 1121 1122 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) 1123 _bond_options_arp_ip_target_set(bond, i, 0, 0); 1124 } 1125 1126 static int bond_option_arp_ip_targets_set(struct bonding *bond, 1127 const struct bond_opt_value *newval) 1128 { 1129 int ret = -EPERM; 1130 __be32 target; 1131 1132 if (newval->string) { 1133 if (!in4_pton(newval->string+1, -1, (u8 *)&target, -1, NULL)) { 1134 netdev_err(bond->dev, "invalid ARP target %pI4 specified\n", 1135 &target); 1136 return ret; 1137 } 1138 if (newval->string[0] == '+') 1139 ret = bond_option_arp_ip_target_add(bond, target); 1140 else if (newval->string[0] == '-') 1141 ret = bond_option_arp_ip_target_rem(bond, target); 1142 else 1143 netdev_err(bond->dev, "no command found in arp_ip_targets file - use +<addr> or -<addr>\n"); 1144 } else { 1145 target = newval->value; 1146 ret = bond_option_arp_ip_target_add(bond, target); 1147 } 1148 1149 return ret; 1150 } 1151 1152 static int bond_option_arp_validate_set(struct bonding *bond, 1153 const struct bond_opt_value *newval) 1154 { 1155 netdev_dbg(bond->dev, "Setting arp_validate to %s (%llu)\n", 1156 newval->string, newval->value); 1157 bond->params.arp_validate = newval->value; 1158 1159 return 0; 1160 } 1161 1162 static int bond_option_arp_all_targets_set(struct bonding *bond, 1163 const struct bond_opt_value *newval) 1164 { 1165 netdev_dbg(bond->dev, "Setting arp_all_targets to %s (%llu)\n", 1166 newval->string, newval->value); 1167 bond->params.arp_all_targets = newval->value; 1168 1169 return 0; 1170 } 1171 1172 static int bond_option_primary_set(struct bonding *bond, 1173 const struct bond_opt_value *newval) 1174 { 1175 char *p, *primary = newval->string; 1176 struct list_head *iter; 1177 struct slave *slave; 1178 1179 block_netpoll_tx(); 1180 1181 p = strchr(primary, '\n'); 1182 if (p) 1183 *p = '\0'; 1184 /* check to see if we are clearing primary */ 1185 if (!strlen(primary)) { 1186 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1187 RCU_INIT_POINTER(bond->primary_slave, NULL); 1188 memset(bond->params.primary, 0, sizeof(bond->params.primary)); 1189 bond_select_active_slave(bond); 1190 goto out; 1191 } 1192 1193 bond_for_each_slave(bond, slave, iter) { 1194 if (strncmp(slave->dev->name, primary, IFNAMSIZ) == 0) { 1195 slave_dbg(bond->dev, slave->dev, "Setting as primary slave\n"); 1196 rcu_assign_pointer(bond->primary_slave, slave); 1197 strcpy(bond->params.primary, slave->dev->name); 1198 bond->force_primary = true; 1199 bond_select_active_slave(bond); 1200 goto out; 1201 } 1202 } 1203 1204 if (rtnl_dereference(bond->primary_slave)) { 1205 netdev_dbg(bond->dev, "Setting primary slave to None\n"); 1206 RCU_INIT_POINTER(bond->primary_slave, NULL); 1207 bond_select_active_slave(bond); 1208 } 1209 strscpy_pad(bond->params.primary, primary, IFNAMSIZ); 1210 1211 netdev_dbg(bond->dev, "Recording %s as primary, but it has not been enslaved yet\n", 1212 primary); 1213 1214 out: 1215 unblock_netpoll_tx(); 1216 1217 return 0; 1218 } 1219 1220 static int bond_option_primary_reselect_set(struct bonding *bond, 1221 const struct bond_opt_value *newval) 1222 { 1223 netdev_dbg(bond->dev, "Setting primary_reselect to %s (%llu)\n", 1224 newval->string, newval->value); 1225 bond->params.primary_reselect = newval->value; 1226 1227 block_netpoll_tx(); 1228 bond_select_active_slave(bond); 1229 unblock_netpoll_tx(); 1230 1231 return 0; 1232 } 1233 1234 static int bond_option_fail_over_mac_set(struct bonding *bond, 1235 const struct bond_opt_value *newval) 1236 { 1237 netdev_dbg(bond->dev, "Setting fail_over_mac to %s (%llu)\n", 1238 newval->string, newval->value); 1239 bond->params.fail_over_mac = newval->value; 1240 1241 return 0; 1242 } 1243 1244 static int bond_option_xmit_hash_policy_set(struct bonding *bond, 1245 const struct bond_opt_value *newval) 1246 { 1247 netdev_dbg(bond->dev, "Setting xmit hash policy to %s (%llu)\n", 1248 newval->string, newval->value); 1249 bond->params.xmit_policy = newval->value; 1250 1251 if (bond->dev->reg_state == NETREG_REGISTERED) 1252 if (bond_set_tls_features(bond)) 1253 netdev_update_features(bond->dev); 1254 1255 return 0; 1256 } 1257 1258 static int bond_option_resend_igmp_set(struct bonding *bond, 1259 const struct bond_opt_value *newval) 1260 { 1261 netdev_dbg(bond->dev, "Setting resend_igmp to %llu\n", 1262 newval->value); 1263 bond->params.resend_igmp = newval->value; 1264 1265 return 0; 1266 } 1267 1268 static int bond_option_num_peer_notif_set(struct bonding *bond, 1269 const struct bond_opt_value *newval) 1270 { 1271 bond->params.num_peer_notif = newval->value; 1272 1273 return 0; 1274 } 1275 1276 static int bond_option_all_slaves_active_set(struct bonding *bond, 1277 const struct bond_opt_value *newval) 1278 { 1279 struct list_head *iter; 1280 struct slave *slave; 1281 1282 if (newval->value == bond->params.all_slaves_active) 1283 return 0; 1284 bond->params.all_slaves_active = newval->value; 1285 bond_for_each_slave(bond, slave, iter) { 1286 if (!bond_is_active_slave(slave)) { 1287 if (newval->value) 1288 slave->inactive = 0; 1289 else 1290 slave->inactive = 1; 1291 } 1292 } 1293 1294 return 0; 1295 } 1296 1297 static int bond_option_min_links_set(struct bonding *bond, 1298 const struct bond_opt_value *newval) 1299 { 1300 netdev_dbg(bond->dev, "Setting min links value to %llu\n", 1301 newval->value); 1302 bond->params.min_links = newval->value; 1303 bond_set_carrier(bond); 1304 1305 return 0; 1306 } 1307 1308 static int bond_option_lp_interval_set(struct bonding *bond, 1309 const struct bond_opt_value *newval) 1310 { 1311 bond->params.lp_interval = newval->value; 1312 1313 return 0; 1314 } 1315 1316 static int bond_option_pps_set(struct bonding *bond, 1317 const struct bond_opt_value *newval) 1318 { 1319 netdev_dbg(bond->dev, "Setting packets per slave to %llu\n", 1320 newval->value); 1321 bond->params.packets_per_slave = newval->value; 1322 if (newval->value > 0) { 1323 bond->params.reciprocal_packets_per_slave = 1324 reciprocal_value(newval->value); 1325 } else { 1326 /* reciprocal_packets_per_slave is unused if 1327 * packets_per_slave is 0 or 1, just initialize it 1328 */ 1329 bond->params.reciprocal_packets_per_slave = 1330 (struct reciprocal_value) { 0 }; 1331 } 1332 1333 return 0; 1334 } 1335 1336 static int bond_option_lacp_rate_set(struct bonding *bond, 1337 const struct bond_opt_value *newval) 1338 { 1339 netdev_dbg(bond->dev, "Setting LACP rate to %s (%llu)\n", 1340 newval->string, newval->value); 1341 bond->params.lacp_fast = newval->value; 1342 bond_3ad_update_lacp_rate(bond); 1343 1344 return 0; 1345 } 1346 1347 static int bond_option_ad_select_set(struct bonding *bond, 1348 const struct bond_opt_value *newval) 1349 { 1350 netdev_dbg(bond->dev, "Setting ad_select to %s (%llu)\n", 1351 newval->string, newval->value); 1352 bond->params.ad_select = newval->value; 1353 1354 return 0; 1355 } 1356 1357 static int bond_option_queue_id_set(struct bonding *bond, 1358 const struct bond_opt_value *newval) 1359 { 1360 struct slave *slave, *update_slave; 1361 struct net_device *sdev; 1362 struct list_head *iter; 1363 char *delim; 1364 int ret = 0; 1365 u16 qid; 1366 1367 /* delim will point to queue id if successful */ 1368 delim = strchr(newval->string, ':'); 1369 if (!delim) 1370 goto err_no_cmd; 1371 1372 /* Terminate string that points to device name and bump it 1373 * up one, so we can read the queue id there. 1374 */ 1375 *delim = '\0'; 1376 if (sscanf(++delim, "%hd\n", &qid) != 1) 1377 goto err_no_cmd; 1378 1379 /* Check buffer length, valid ifname and queue id */ 1380 if (!dev_valid_name(newval->string) || 1381 qid > bond->dev->real_num_tx_queues) 1382 goto err_no_cmd; 1383 1384 /* Get the pointer to that interface if it exists */ 1385 sdev = __dev_get_by_name(dev_net(bond->dev), newval->string); 1386 if (!sdev) 1387 goto err_no_cmd; 1388 1389 /* Search for thes slave and check for duplicate qids */ 1390 update_slave = NULL; 1391 bond_for_each_slave(bond, slave, iter) { 1392 if (sdev == slave->dev) 1393 /* We don't need to check the matching 1394 * slave for dups, since we're overwriting it 1395 */ 1396 update_slave = slave; 1397 else if (qid && qid == slave->queue_id) { 1398 goto err_no_cmd; 1399 } 1400 } 1401 1402 if (!update_slave) 1403 goto err_no_cmd; 1404 1405 /* Actually set the qids for the slave */ 1406 update_slave->queue_id = qid; 1407 1408 out: 1409 return ret; 1410 1411 err_no_cmd: 1412 netdev_dbg(bond->dev, "invalid input for queue_id set\n"); 1413 ret = -EPERM; 1414 goto out; 1415 1416 } 1417 1418 static int bond_option_slaves_set(struct bonding *bond, 1419 const struct bond_opt_value *newval) 1420 { 1421 char command[IFNAMSIZ + 1] = { 0, }; 1422 struct net_device *dev; 1423 char *ifname; 1424 int ret; 1425 1426 sscanf(newval->string, "%16s", command); /* IFNAMSIZ*/ 1427 ifname = command + 1; 1428 if ((strlen(command) <= 1) || 1429 (command[0] != '+' && command[0] != '-') || 1430 !dev_valid_name(ifname)) 1431 goto err_no_cmd; 1432 1433 dev = __dev_get_by_name(dev_net(bond->dev), ifname); 1434 if (!dev) { 1435 netdev_dbg(bond->dev, "interface %s does not exist!\n", 1436 ifname); 1437 ret = -ENODEV; 1438 goto out; 1439 } 1440 1441 switch (command[0]) { 1442 case '+': 1443 slave_dbg(bond->dev, dev, "Enslaving interface\n"); 1444 ret = bond_enslave(bond->dev, dev, NULL); 1445 break; 1446 1447 case '-': 1448 slave_dbg(bond->dev, dev, "Releasing interface\n"); 1449 ret = bond_release(bond->dev, dev); 1450 break; 1451 1452 default: 1453 /* should not run here. */ 1454 goto err_no_cmd; 1455 } 1456 1457 out: 1458 return ret; 1459 1460 err_no_cmd: 1461 netdev_err(bond->dev, "no command found in slaves file - use +ifname or -ifname\n"); 1462 ret = -EPERM; 1463 goto out; 1464 } 1465 1466 static int bond_option_tlb_dynamic_lb_set(struct bonding *bond, 1467 const struct bond_opt_value *newval) 1468 { 1469 netdev_dbg(bond->dev, "Setting dynamic-lb to %s (%llu)\n", 1470 newval->string, newval->value); 1471 bond->params.tlb_dynamic_lb = newval->value; 1472 1473 return 0; 1474 } 1475 1476 static int bond_option_ad_actor_sys_prio_set(struct bonding *bond, 1477 const struct bond_opt_value *newval) 1478 { 1479 netdev_dbg(bond->dev, "Setting ad_actor_sys_prio to %llu\n", 1480 newval->value); 1481 1482 bond->params.ad_actor_sys_prio = newval->value; 1483 bond_3ad_update_ad_actor_settings(bond); 1484 1485 return 0; 1486 } 1487 1488 static int bond_option_ad_actor_system_set(struct bonding *bond, 1489 const struct bond_opt_value *newval) 1490 { 1491 u8 macaddr[ETH_ALEN]; 1492 u8 *mac; 1493 1494 if (newval->string) { 1495 if (!mac_pton(newval->string, macaddr)) 1496 goto err; 1497 mac = macaddr; 1498 } else { 1499 mac = (u8 *)&newval->value; 1500 } 1501 1502 if (!is_valid_ether_addr(mac)) 1503 goto err; 1504 1505 netdev_dbg(bond->dev, "Setting ad_actor_system to %pM\n", mac); 1506 ether_addr_copy(bond->params.ad_actor_system, mac); 1507 bond_3ad_update_ad_actor_settings(bond); 1508 1509 return 0; 1510 1511 err: 1512 netdev_err(bond->dev, "Invalid ad_actor_system MAC address.\n"); 1513 return -EINVAL; 1514 } 1515 1516 static int bond_option_ad_user_port_key_set(struct bonding *bond, 1517 const struct bond_opt_value *newval) 1518 { 1519 netdev_dbg(bond->dev, "Setting ad_user_port_key to %llu\n", 1520 newval->value); 1521 1522 bond->params.ad_user_port_key = newval->value; 1523 return 0; 1524 } 1525