1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * drivers/net/bond/bond_netlink.c - Netlink interface for bonding 4 * Copyright (c) 2013 Jiri Pirko <jiri@resnulli.us> 5 * Copyright (c) 2013 Scott Feldman <sfeldma@cumulusnetworks.com> 6 */ 7 8 #include <linux/module.h> 9 #include <linux/errno.h> 10 #include <linux/netdevice.h> 11 #include <linux/etherdevice.h> 12 #include <linux/if_link.h> 13 #include <linux/if_ether.h> 14 #include <net/netlink.h> 15 #include <net/rtnetlink.h> 16 #include <net/bonding.h> 17 #include <net/ipv6.h> 18 19 static size_t bond_get_slave_size(const struct net_device *bond_dev, 20 const struct net_device *slave_dev) 21 { 22 return nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_STATE */ 23 nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_MII_STATUS */ 24 nla_total_size(sizeof(u32)) + /* IFLA_BOND_SLAVE_LINK_FAILURE_COUNT */ 25 nla_total_size(MAX_ADDR_LEN) + /* IFLA_BOND_SLAVE_PERM_HWADDR */ 26 nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_QUEUE_ID */ 27 nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */ 28 nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */ 29 nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */ 30 nla_total_size(sizeof(s32)) + /* IFLA_BOND_SLAVE_PRIO */ 31 nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_ACTOR_PORT_PRIO */ 32 nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_AD_CHURN_ACTOR_STATE */ 33 nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_AD_CHURN_PARTNER_STATE */ 34 0; 35 } 36 37 static int bond_fill_slave_info(struct sk_buff *skb, 38 const struct net_device *bond_dev, 39 const struct net_device *slave_dev) 40 { 41 struct slave *slave = bond_slave_get_rtnl(slave_dev); 42 43 if (nla_put_u8(skb, IFLA_BOND_SLAVE_STATE, bond_slave_state(slave))) 44 goto nla_put_failure; 45 46 if (nla_put_u8(skb, IFLA_BOND_SLAVE_MII_STATUS, slave->link)) 47 goto nla_put_failure; 48 49 if (nla_put_u32(skb, IFLA_BOND_SLAVE_LINK_FAILURE_COUNT, 50 slave->link_failure_count)) 51 goto nla_put_failure; 52 53 if (nla_put(skb, IFLA_BOND_SLAVE_PERM_HWADDR, 54 slave_dev->addr_len, slave->perm_hwaddr)) 55 goto nla_put_failure; 56 57 if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, 58 READ_ONCE(slave->queue_id))) 59 goto nla_put_failure; 60 61 if (nla_put_s32(skb, IFLA_BOND_SLAVE_PRIO, slave->prio)) 62 goto nla_put_failure; 63 64 if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) { 65 const struct aggregator *agg; 66 const struct port *ad_port; 67 68 ad_port = &SLAVE_AD_INFO(slave)->port; 69 rcu_read_lock(); 70 agg = rcu_dereference(SLAVE_AD_INFO(slave)->port.aggregator); 71 if (agg) { 72 if (nla_put_u16(skb, IFLA_BOND_SLAVE_AD_AGGREGATOR_ID, 73 agg->aggregator_identifier)) 74 goto nla_put_failure_rcu; 75 if (nla_put_u8(skb, 76 IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE, 77 ad_port->actor_oper_port_state)) 78 goto nla_put_failure_rcu; 79 if (nla_put_u16(skb, 80 IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE, 81 ad_port->partner_oper.port_state)) 82 goto nla_put_failure_rcu; 83 84 if (nla_put_u8(skb, IFLA_BOND_SLAVE_AD_CHURN_ACTOR_STATE, 85 READ_ONCE(ad_port->sm_churn_actor_state))) 86 goto nla_put_failure_rcu; 87 if (nla_put_u8(skb, IFLA_BOND_SLAVE_AD_CHURN_PARTNER_STATE, 88 READ_ONCE(ad_port->sm_churn_partner_state))) 89 goto nla_put_failure_rcu; 90 } 91 rcu_read_unlock(); 92 93 if (nla_put_u16(skb, IFLA_BOND_SLAVE_ACTOR_PORT_PRIO, 94 SLAVE_AD_INFO(slave)->port_priority)) 95 goto nla_put_failure; 96 } 97 98 return 0; 99 100 nla_put_failure_rcu: 101 rcu_read_unlock(); 102 nla_put_failure: 103 return -EMSGSIZE; 104 } 105 106 /* Limit the max delay range to 300s */ 107 static const struct netlink_range_validation delay_range = { 108 .max = 300000, 109 }; 110 111 static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = { 112 [IFLA_BOND_MODE] = { .type = NLA_U8 }, 113 [IFLA_BOND_ACTIVE_SLAVE] = { .type = NLA_U32 }, 114 [IFLA_BOND_MIIMON] = { .type = NLA_U32 }, 115 [IFLA_BOND_UPDELAY] = { .type = NLA_U32 }, 116 [IFLA_BOND_DOWNDELAY] = { .type = NLA_U32 }, 117 [IFLA_BOND_USE_CARRIER] = { .type = NLA_U8 }, 118 [IFLA_BOND_ARP_INTERVAL] = { .type = NLA_U32 }, 119 [IFLA_BOND_ARP_IP_TARGET] = { .type = NLA_NESTED }, 120 [IFLA_BOND_ARP_VALIDATE] = { .type = NLA_U32 }, 121 [IFLA_BOND_ARP_ALL_TARGETS] = { .type = NLA_U32 }, 122 [IFLA_BOND_PRIMARY] = { .type = NLA_U32 }, 123 [IFLA_BOND_PRIMARY_RESELECT] = { .type = NLA_U8 }, 124 [IFLA_BOND_FAIL_OVER_MAC] = { .type = NLA_U8 }, 125 [IFLA_BOND_XMIT_HASH_POLICY] = { .type = NLA_U8 }, 126 [IFLA_BOND_RESEND_IGMP] = { .type = NLA_U32 }, 127 [IFLA_BOND_NUM_PEER_NOTIF] = { .type = NLA_U8 }, 128 [IFLA_BOND_ALL_SLAVES_ACTIVE] = { .type = NLA_U8 }, 129 [IFLA_BOND_MIN_LINKS] = { .type = NLA_U32 }, 130 [IFLA_BOND_LP_INTERVAL] = { .type = NLA_U32 }, 131 [IFLA_BOND_PACKETS_PER_SLAVE] = { .type = NLA_U32 }, 132 [IFLA_BOND_AD_LACP_ACTIVE] = { .type = NLA_U8 }, 133 [IFLA_BOND_AD_LACP_RATE] = { .type = NLA_U8 }, 134 [IFLA_BOND_AD_SELECT] = { .type = NLA_U8 }, 135 [IFLA_BOND_AD_INFO] = { .type = NLA_NESTED }, 136 [IFLA_BOND_AD_ACTOR_SYS_PRIO] = { .type = NLA_U16 }, 137 [IFLA_BOND_AD_USER_PORT_KEY] = { .type = NLA_U16 }, 138 [IFLA_BOND_AD_ACTOR_SYSTEM] = { .type = NLA_BINARY, 139 .len = ETH_ALEN }, 140 [IFLA_BOND_TLB_DYNAMIC_LB] = { .type = NLA_U8 }, 141 [IFLA_BOND_PEER_NOTIF_DELAY] = NLA_POLICY_FULL_RANGE(NLA_U32, &delay_range), 142 [IFLA_BOND_MISSED_MAX] = { .type = NLA_U8 }, 143 [IFLA_BOND_NS_IP6_TARGET] = { .type = NLA_NESTED }, 144 [IFLA_BOND_COUPLED_CONTROL] = { .type = NLA_U8 }, 145 [IFLA_BOND_BROADCAST_NEIGH] = { .type = NLA_U8 }, 146 [IFLA_BOND_LACP_STRICT] = { .type = NLA_U8 }, 147 }; 148 149 static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = { 150 [IFLA_BOND_SLAVE_QUEUE_ID] = { .type = NLA_U16 }, 151 [IFLA_BOND_SLAVE_PRIO] = { .type = NLA_S32 }, 152 [IFLA_BOND_SLAVE_ACTOR_PORT_PRIO] = { .type = NLA_U16 }, 153 }; 154 155 static int bond_validate(struct nlattr *tb[], struct nlattr *data[], 156 struct netlink_ext_ack *extack) 157 { 158 if (tb[IFLA_ADDRESS]) { 159 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) 160 return -EINVAL; 161 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) 162 return -EADDRNOTAVAIL; 163 } 164 return 0; 165 } 166 167 static int bond_slave_changelink(struct net_device *bond_dev, 168 struct net_device *slave_dev, 169 struct nlattr *tb[], struct nlattr *data[], 170 struct netlink_ext_ack *extack) 171 { 172 struct bonding *bond = netdev_priv(bond_dev); 173 struct bond_opt_value newval; 174 int err; 175 176 if (!data) 177 return 0; 178 179 if (data[IFLA_BOND_SLAVE_QUEUE_ID]) { 180 u16 queue_id = nla_get_u16(data[IFLA_BOND_SLAVE_QUEUE_ID]); 181 char queue_id_str[IFNAMSIZ + 7]; 182 183 /* queue_id option setting expects slave_name:queue_id */ 184 snprintf(queue_id_str, sizeof(queue_id_str), "%s:%u\n", 185 slave_dev->name, queue_id); 186 bond_opt_initstr(&newval, queue_id_str); 187 err = __bond_opt_set(bond, BOND_OPT_QUEUE_ID, &newval, 188 data[IFLA_BOND_SLAVE_QUEUE_ID], extack); 189 if (err) 190 return err; 191 } 192 193 if (data[IFLA_BOND_SLAVE_PRIO]) { 194 int prio = nla_get_s32(data[IFLA_BOND_SLAVE_PRIO]); 195 196 bond_opt_slave_initval(&newval, &slave_dev, prio); 197 err = __bond_opt_set(bond, BOND_OPT_PRIO, &newval, 198 data[IFLA_BOND_SLAVE_PRIO], extack); 199 if (err) 200 return err; 201 } 202 203 if (data[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO]) { 204 u16 ad_prio = nla_get_u16(data[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO]); 205 206 bond_opt_slave_initval(&newval, &slave_dev, ad_prio); 207 err = __bond_opt_set(bond, BOND_OPT_ACTOR_PORT_PRIO, &newval, 208 data[IFLA_BOND_SLAVE_ACTOR_PORT_PRIO], extack); 209 if (err) 210 return err; 211 } 212 213 return 0; 214 } 215 216 static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[], 217 struct nlattr *data[], 218 struct netlink_ext_ack *extack) 219 { 220 struct bonding *bond = netdev_priv(bond_dev); 221 struct bond_opt_value newval; 222 int miimon = 0; 223 int err = 0; 224 225 if (!data) 226 return 0; 227 228 if (data[IFLA_BOND_MODE]) { 229 int mode = nla_get_u8(data[IFLA_BOND_MODE]); 230 231 bond_opt_initval(&newval, mode); 232 err = __bond_opt_set(bond, BOND_OPT_MODE, &newval, 233 data[IFLA_BOND_MODE], extack); 234 if (err) 235 return err; 236 } 237 if (data[IFLA_BOND_ACTIVE_SLAVE]) { 238 int ifindex = nla_get_u32(data[IFLA_BOND_ACTIVE_SLAVE]); 239 struct net_device *slave_dev; 240 char *active_slave = ""; 241 242 if (ifindex != 0) { 243 slave_dev = __dev_get_by_index(dev_net(bond_dev), 244 ifindex); 245 if (!slave_dev) 246 return -ENODEV; 247 active_slave = slave_dev->name; 248 } 249 bond_opt_initstr(&newval, active_slave); 250 err = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval, 251 data[IFLA_BOND_ACTIVE_SLAVE], extack); 252 if (err) 253 return err; 254 } 255 if (data[IFLA_BOND_MIIMON]) { 256 miimon = nla_get_u32(data[IFLA_BOND_MIIMON]); 257 258 bond_opt_initval(&newval, miimon); 259 err = __bond_opt_set(bond, BOND_OPT_MIIMON, &newval, 260 data[IFLA_BOND_MIIMON], extack); 261 if (err) 262 return err; 263 } 264 if (data[IFLA_BOND_UPDELAY]) { 265 int updelay = nla_get_u32(data[IFLA_BOND_UPDELAY]); 266 267 bond_opt_initval(&newval, updelay); 268 err = __bond_opt_set(bond, BOND_OPT_UPDELAY, &newval, 269 data[IFLA_BOND_UPDELAY], extack); 270 if (err) 271 return err; 272 } 273 if (data[IFLA_BOND_DOWNDELAY]) { 274 int downdelay = nla_get_u32(data[IFLA_BOND_DOWNDELAY]); 275 276 bond_opt_initval(&newval, downdelay); 277 err = __bond_opt_set(bond, BOND_OPT_DOWNDELAY, &newval, 278 data[IFLA_BOND_DOWNDELAY], extack); 279 if (err) 280 return err; 281 } 282 if (data[IFLA_BOND_PEER_NOTIF_DELAY]) { 283 int delay = nla_get_u32(data[IFLA_BOND_PEER_NOTIF_DELAY]); 284 285 bond_opt_initval(&newval, delay); 286 err = __bond_opt_set(bond, BOND_OPT_PEER_NOTIF_DELAY, &newval, 287 data[IFLA_BOND_PEER_NOTIF_DELAY], extack); 288 if (err) 289 return err; 290 } 291 if (data[IFLA_BOND_USE_CARRIER]) { 292 if (nla_get_u8(data[IFLA_BOND_USE_CARRIER]) != 1) { 293 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_USE_CARRIER], 294 "option obsolete, use_carrier cannot be disabled"); 295 return -EINVAL; 296 } 297 } 298 if (data[IFLA_BOND_ARP_INTERVAL]) { 299 int arp_interval = nla_get_u32(data[IFLA_BOND_ARP_INTERVAL]); 300 301 if (arp_interval && miimon) { 302 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_INTERVAL], 303 "ARP monitoring cannot be used with MII monitoring"); 304 return -EINVAL; 305 } 306 307 bond_opt_initval(&newval, arp_interval); 308 err = __bond_opt_set(bond, BOND_OPT_ARP_INTERVAL, &newval, 309 data[IFLA_BOND_ARP_INTERVAL], extack); 310 if (err) 311 return err; 312 } 313 if (data[IFLA_BOND_ARP_IP_TARGET]) { 314 struct nlattr *attr; 315 int i = 0, rem; 316 317 bond_option_arp_ip_targets_clear(bond); 318 nla_for_each_nested(attr, data[IFLA_BOND_ARP_IP_TARGET], rem) { 319 __be32 target; 320 321 if (nla_len(attr) < sizeof(target)) 322 return -EINVAL; 323 324 target = nla_get_be32(attr); 325 326 bond_opt_initval(&newval, (__force u64)target); 327 err = __bond_opt_set(bond, BOND_OPT_ARP_TARGETS, 328 &newval, 329 data[IFLA_BOND_ARP_IP_TARGET], 330 extack); 331 if (err) 332 break; 333 i++; 334 } 335 if (i == 0 && bond->params.arp_interval) 336 netdev_warn(bond->dev, "Removing last arp target with arp_interval on\n"); 337 if (err) 338 return err; 339 } 340 #if IS_ENABLED(CONFIG_IPV6) 341 if (data[IFLA_BOND_NS_IP6_TARGET]) { 342 struct nlattr *attr; 343 int i = 0, rem; 344 345 bond_option_ns_ip6_targets_clear(bond); 346 nla_for_each_nested(attr, data[IFLA_BOND_NS_IP6_TARGET], rem) { 347 struct in6_addr addr6; 348 349 if (nla_len(attr) < sizeof(addr6)) { 350 NL_SET_ERR_MSG(extack, "Invalid IPv6 address"); 351 return -EINVAL; 352 } 353 354 addr6 = nla_get_in6_addr(attr); 355 356 bond_opt_initextra(&newval, &addr6, sizeof(addr6)); 357 err = __bond_opt_set(bond, BOND_OPT_NS_TARGETS, 358 &newval, 359 data[IFLA_BOND_NS_IP6_TARGET], 360 extack); 361 if (err) 362 break; 363 i++; 364 } 365 if (i == 0 && bond->params.arp_interval) 366 netdev_warn(bond->dev, "Removing last ns target with arp_interval on\n"); 367 if (err) 368 return err; 369 } 370 #endif 371 if (data[IFLA_BOND_ARP_VALIDATE]) { 372 int arp_validate = nla_get_u32(data[IFLA_BOND_ARP_VALIDATE]); 373 374 if (arp_validate && miimon) { 375 NL_SET_ERR_MSG_ATTR(extack, data[IFLA_BOND_ARP_VALIDATE], 376 "ARP validating cannot be used with MII monitoring"); 377 return -EINVAL; 378 } 379 380 bond_opt_initval(&newval, arp_validate); 381 err = __bond_opt_set(bond, BOND_OPT_ARP_VALIDATE, &newval, 382 data[IFLA_BOND_ARP_VALIDATE], extack); 383 if (err) 384 return err; 385 } 386 if (data[IFLA_BOND_ARP_ALL_TARGETS]) { 387 int arp_all_targets = 388 nla_get_u32(data[IFLA_BOND_ARP_ALL_TARGETS]); 389 390 bond_opt_initval(&newval, arp_all_targets); 391 err = __bond_opt_set(bond, BOND_OPT_ARP_ALL_TARGETS, &newval, 392 data[IFLA_BOND_ARP_ALL_TARGETS], extack); 393 if (err) 394 return err; 395 } 396 if (data[IFLA_BOND_PRIMARY]) { 397 int ifindex = nla_get_u32(data[IFLA_BOND_PRIMARY]); 398 struct net_device *dev; 399 char *primary = ""; 400 401 dev = __dev_get_by_index(dev_net(bond_dev), ifindex); 402 if (dev) 403 primary = dev->name; 404 405 bond_opt_initstr(&newval, primary); 406 err = __bond_opt_set(bond, BOND_OPT_PRIMARY, &newval, 407 data[IFLA_BOND_PRIMARY], extack); 408 if (err) 409 return err; 410 } 411 if (data[IFLA_BOND_PRIMARY_RESELECT]) { 412 int primary_reselect = 413 nla_get_u8(data[IFLA_BOND_PRIMARY_RESELECT]); 414 415 bond_opt_initval(&newval, primary_reselect); 416 err = __bond_opt_set(bond, BOND_OPT_PRIMARY_RESELECT, &newval, 417 data[IFLA_BOND_PRIMARY_RESELECT], extack); 418 if (err) 419 return err; 420 } 421 if (data[IFLA_BOND_FAIL_OVER_MAC]) { 422 int fail_over_mac = 423 nla_get_u8(data[IFLA_BOND_FAIL_OVER_MAC]); 424 425 bond_opt_initval(&newval, fail_over_mac); 426 err = __bond_opt_set(bond, BOND_OPT_FAIL_OVER_MAC, &newval, 427 data[IFLA_BOND_FAIL_OVER_MAC], extack); 428 if (err) 429 return err; 430 } 431 if (data[IFLA_BOND_XMIT_HASH_POLICY]) { 432 int xmit_hash_policy = 433 nla_get_u8(data[IFLA_BOND_XMIT_HASH_POLICY]); 434 435 bond_opt_initval(&newval, xmit_hash_policy); 436 err = __bond_opt_set(bond, BOND_OPT_XMIT_HASH, &newval, 437 data[IFLA_BOND_XMIT_HASH_POLICY], extack); 438 if (err) 439 return err; 440 } 441 if (data[IFLA_BOND_RESEND_IGMP]) { 442 int resend_igmp = 443 nla_get_u32(data[IFLA_BOND_RESEND_IGMP]); 444 445 bond_opt_initval(&newval, resend_igmp); 446 err = __bond_opt_set(bond, BOND_OPT_RESEND_IGMP, &newval, 447 data[IFLA_BOND_RESEND_IGMP], extack); 448 if (err) 449 return err; 450 } 451 if (data[IFLA_BOND_NUM_PEER_NOTIF]) { 452 int num_peer_notif = 453 nla_get_u8(data[IFLA_BOND_NUM_PEER_NOTIF]); 454 455 bond_opt_initval(&newval, num_peer_notif); 456 err = __bond_opt_set(bond, BOND_OPT_NUM_PEER_NOTIF, &newval, 457 data[IFLA_BOND_NUM_PEER_NOTIF], extack); 458 if (err) 459 return err; 460 } 461 if (data[IFLA_BOND_ALL_SLAVES_ACTIVE]) { 462 int all_slaves_active = 463 nla_get_u8(data[IFLA_BOND_ALL_SLAVES_ACTIVE]); 464 465 bond_opt_initval(&newval, all_slaves_active); 466 err = __bond_opt_set(bond, BOND_OPT_ALL_SLAVES_ACTIVE, &newval, 467 data[IFLA_BOND_ALL_SLAVES_ACTIVE], extack); 468 if (err) 469 return err; 470 } 471 if (data[IFLA_BOND_MIN_LINKS]) { 472 int min_links = 473 nla_get_u32(data[IFLA_BOND_MIN_LINKS]); 474 475 bond_opt_initval(&newval, min_links); 476 err = __bond_opt_set(bond, BOND_OPT_MINLINKS, &newval, 477 data[IFLA_BOND_MIN_LINKS], extack); 478 if (err) 479 return err; 480 } 481 if (data[IFLA_BOND_LP_INTERVAL]) { 482 int lp_interval = 483 nla_get_u32(data[IFLA_BOND_LP_INTERVAL]); 484 485 bond_opt_initval(&newval, lp_interval); 486 err = __bond_opt_set(bond, BOND_OPT_LP_INTERVAL, &newval, 487 data[IFLA_BOND_LP_INTERVAL], extack); 488 if (err) 489 return err; 490 } 491 if (data[IFLA_BOND_PACKETS_PER_SLAVE]) { 492 int packets_per_slave = 493 nla_get_u32(data[IFLA_BOND_PACKETS_PER_SLAVE]); 494 495 bond_opt_initval(&newval, packets_per_slave); 496 err = __bond_opt_set(bond, BOND_OPT_PACKETS_PER_SLAVE, &newval, 497 data[IFLA_BOND_PACKETS_PER_SLAVE], extack); 498 if (err) 499 return err; 500 } 501 502 if (data[IFLA_BOND_AD_LACP_ACTIVE]) { 503 int lacp_active = nla_get_u8(data[IFLA_BOND_AD_LACP_ACTIVE]); 504 505 bond_opt_initval(&newval, lacp_active); 506 err = __bond_opt_set(bond, BOND_OPT_LACP_ACTIVE, &newval, 507 data[IFLA_BOND_AD_LACP_ACTIVE], extack); 508 if (err) 509 return err; 510 } 511 512 if (data[IFLA_BOND_AD_LACP_RATE]) { 513 int lacp_rate = 514 nla_get_u8(data[IFLA_BOND_AD_LACP_RATE]); 515 516 bond_opt_initval(&newval, lacp_rate); 517 err = __bond_opt_set(bond, BOND_OPT_LACP_RATE, &newval, 518 data[IFLA_BOND_AD_LACP_RATE], extack); 519 if (err) 520 return err; 521 } 522 if (data[IFLA_BOND_AD_SELECT]) { 523 int ad_select = 524 nla_get_u8(data[IFLA_BOND_AD_SELECT]); 525 526 bond_opt_initval(&newval, ad_select); 527 err = __bond_opt_set(bond, BOND_OPT_AD_SELECT, &newval, 528 data[IFLA_BOND_AD_SELECT], extack); 529 if (err) 530 return err; 531 } 532 if (data[IFLA_BOND_AD_ACTOR_SYS_PRIO]) { 533 int actor_sys_prio = 534 nla_get_u16(data[IFLA_BOND_AD_ACTOR_SYS_PRIO]); 535 536 bond_opt_initval(&newval, actor_sys_prio); 537 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYS_PRIO, &newval, 538 data[IFLA_BOND_AD_ACTOR_SYS_PRIO], extack); 539 if (err) 540 return err; 541 } 542 if (data[IFLA_BOND_AD_USER_PORT_KEY]) { 543 int port_key = 544 nla_get_u16(data[IFLA_BOND_AD_USER_PORT_KEY]); 545 546 bond_opt_initval(&newval, port_key); 547 err = __bond_opt_set(bond, BOND_OPT_AD_USER_PORT_KEY, &newval, 548 data[IFLA_BOND_AD_USER_PORT_KEY], extack); 549 if (err) 550 return err; 551 } 552 if (data[IFLA_BOND_AD_ACTOR_SYSTEM]) { 553 if (nla_len(data[IFLA_BOND_AD_ACTOR_SYSTEM]) != ETH_ALEN) 554 return -EINVAL; 555 556 bond_opt_initval(&newval, 557 nla_get_u64(data[IFLA_BOND_AD_ACTOR_SYSTEM])); 558 err = __bond_opt_set(bond, BOND_OPT_AD_ACTOR_SYSTEM, &newval, 559 data[IFLA_BOND_AD_ACTOR_SYSTEM], extack); 560 if (err) 561 return err; 562 } 563 if (data[IFLA_BOND_TLB_DYNAMIC_LB]) { 564 int dynamic_lb = nla_get_u8(data[IFLA_BOND_TLB_DYNAMIC_LB]); 565 566 bond_opt_initval(&newval, dynamic_lb); 567 err = __bond_opt_set(bond, BOND_OPT_TLB_DYNAMIC_LB, &newval, 568 data[IFLA_BOND_TLB_DYNAMIC_LB], extack); 569 if (err) 570 return err; 571 } 572 573 if (data[IFLA_BOND_MISSED_MAX]) { 574 int missed_max = nla_get_u8(data[IFLA_BOND_MISSED_MAX]); 575 576 bond_opt_initval(&newval, missed_max); 577 err = __bond_opt_set(bond, BOND_OPT_MISSED_MAX, &newval, 578 data[IFLA_BOND_MISSED_MAX], extack); 579 if (err) 580 return err; 581 } 582 583 if (data[IFLA_BOND_COUPLED_CONTROL]) { 584 int coupled_control = nla_get_u8(data[IFLA_BOND_COUPLED_CONTROL]); 585 586 bond_opt_initval(&newval, coupled_control); 587 err = __bond_opt_set(bond, BOND_OPT_COUPLED_CONTROL, &newval, 588 data[IFLA_BOND_COUPLED_CONTROL], extack); 589 if (err) 590 return err; 591 } 592 593 if (data[IFLA_BOND_BROADCAST_NEIGH]) { 594 int broadcast_neigh = nla_get_u8(data[IFLA_BOND_BROADCAST_NEIGH]); 595 596 bond_opt_initval(&newval, broadcast_neigh); 597 err = __bond_opt_set(bond, BOND_OPT_BROADCAST_NEIGH, &newval, 598 data[IFLA_BOND_BROADCAST_NEIGH], extack); 599 if (err) 600 return err; 601 } 602 603 if (data[IFLA_BOND_LACP_STRICT]) { 604 int fallback_mode = nla_get_u8(data[IFLA_BOND_LACP_STRICT]); 605 606 bond_opt_initval(&newval, fallback_mode); 607 err = __bond_opt_set(bond, BOND_OPT_LACP_STRICT, &newval, 608 data[IFLA_BOND_LACP_STRICT], extack); 609 if (err) 610 return err; 611 } 612 613 return 0; 614 } 615 616 static int bond_newlink(struct net_device *bond_dev, 617 struct rtnl_newlink_params *params, 618 struct netlink_ext_ack *extack) 619 { 620 struct bonding *bond = netdev_priv(bond_dev); 621 struct nlattr **data = params->data; 622 struct nlattr **tb = params->tb; 623 int err; 624 625 err = register_netdevice(bond_dev); 626 if (err) 627 return err; 628 629 netif_carrier_off(bond_dev); 630 bond_work_init_all(bond); 631 632 err = bond_changelink(bond_dev, tb, data, extack); 633 if (err) { 634 bond_work_cancel_all(bond); 635 unregister_netdevice(bond_dev); 636 } 637 638 return err; 639 } 640 641 static size_t bond_get_size(const struct net_device *bond_dev) 642 { 643 return nla_total_size(sizeof(u8)) + /* IFLA_BOND_MODE */ 644 nla_total_size(sizeof(u32)) + /* IFLA_BOND_ACTIVE_SLAVE */ 645 nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIIMON */ 646 nla_total_size(sizeof(u32)) + /* IFLA_BOND_UPDELAY */ 647 nla_total_size(sizeof(u32)) + /* IFLA_BOND_DOWNDELAY */ 648 nla_total_size(sizeof(u8)) + /* IFLA_BOND_USE_CARRIER */ 649 nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_INTERVAL */ 650 /* IFLA_BOND_ARP_IP_TARGET */ 651 nla_total_size(sizeof(struct nlattr)) + 652 nla_total_size(sizeof(u32)) * BOND_MAX_ARP_TARGETS + 653 nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_VALIDATE */ 654 nla_total_size(sizeof(u32)) + /* IFLA_BOND_ARP_ALL_TARGETS */ 655 nla_total_size(sizeof(u32)) + /* IFLA_BOND_PRIMARY */ 656 nla_total_size(sizeof(u8)) + /* IFLA_BOND_PRIMARY_RESELECT */ 657 nla_total_size(sizeof(u8)) + /* IFLA_BOND_FAIL_OVER_MAC */ 658 nla_total_size(sizeof(u8)) + /* IFLA_BOND_XMIT_HASH_POLICY */ 659 nla_total_size(sizeof(u32)) + /* IFLA_BOND_RESEND_IGMP */ 660 nla_total_size(sizeof(u8)) + /* IFLA_BOND_NUM_PEER_NOTIF */ 661 nla_total_size(sizeof(u8)) + /* IFLA_BOND_ALL_SLAVES_ACTIVE */ 662 nla_total_size(sizeof(u32)) + /* IFLA_BOND_MIN_LINKS */ 663 nla_total_size(sizeof(u32)) + /* IFLA_BOND_LP_INTERVAL */ 664 nla_total_size(sizeof(u32)) + /* IFLA_BOND_PACKETS_PER_SLAVE */ 665 nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_LACP_ACTIVE */ 666 nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_LACP_RATE */ 667 nla_total_size(sizeof(u8)) + /* IFLA_BOND_AD_SELECT */ 668 nla_total_size(sizeof(struct nlattr)) + /* IFLA_BOND_AD_INFO */ 669 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_AGGREGATOR */ 670 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_NUM_PORTS */ 671 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_ACTOR_KEY */ 672 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_INFO_PARTNER_KEY*/ 673 nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_INFO_PARTNER_MAC*/ 674 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_ACTOR_SYS_PRIO */ 675 nla_total_size(sizeof(u16)) + /* IFLA_BOND_AD_USER_PORT_KEY */ 676 nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */ 677 nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */ 678 nla_total_size(sizeof(u32)) + /* IFLA_BOND_PEER_NOTIF_DELAY */ 679 nla_total_size(sizeof(u8)) + /* IFLA_BOND_MISSED_MAX */ 680 /* IFLA_BOND_NS_IP6_TARGET */ 681 nla_total_size(sizeof(struct nlattr)) + 682 nla_total_size(sizeof(struct in6_addr)) * BOND_MAX_NS_TARGETS + 683 nla_total_size(sizeof(u8)) + /* IFLA_BOND_COUPLED_CONTROL */ 684 nla_total_size(sizeof(u8)) + /* IFLA_BOND_BROADCAST_NEIGH */ 685 nla_total_size(sizeof(u8)) + /* IFLA_BOND_LACP_STRICT */ 686 0; 687 } 688 689 static int bond_option_active_slave_get_ifindex_rcu(const struct bonding *bond) 690 { 691 const struct net_device *dev = NULL; 692 const struct slave *slave; 693 694 slave = rcu_dereference(bond->curr_active_slave); 695 if (slave) 696 dev = slave->dev; 697 return dev ? dev->ifindex : 0; 698 } 699 700 static int bond_fill_info(struct sk_buff *skb, 701 const struct net_device *bond_dev) 702 { 703 const struct bonding *bond = netdev_priv(bond_dev); 704 int i, targets_added, miimon, mode; 705 const struct slave *primary; 706 struct nlattr *targets; 707 708 rcu_read_lock(); 709 mode = READ_ONCE(bond->params.mode); 710 if (nla_put_u8(skb, IFLA_BOND_MODE, mode)) 711 goto nla_put_failure; 712 713 if (bond_mode_uses_primary(mode)) { 714 int ifindex = bond_option_active_slave_get_ifindex_rcu(bond); 715 716 if (ifindex && nla_put_u32(skb, IFLA_BOND_ACTIVE_SLAVE, ifindex)) 717 goto nla_put_failure; 718 } 719 720 miimon = READ_ONCE(bond->params.miimon); 721 if (nla_put_u32(skb, IFLA_BOND_MIIMON, miimon)) 722 goto nla_put_failure; 723 724 if (nla_put_u32(skb, IFLA_BOND_UPDELAY, 725 READ_ONCE(bond->params.updelay) * miimon)) 726 goto nla_put_failure; 727 728 if (nla_put_u32(skb, IFLA_BOND_DOWNDELAY, 729 READ_ONCE(bond->params.downdelay) * miimon)) 730 goto nla_put_failure; 731 732 if (nla_put_u32(skb, IFLA_BOND_PEER_NOTIF_DELAY, 733 READ_ONCE(bond->params.peer_notif_delay) * miimon)) 734 goto nla_put_failure; 735 736 if (nla_put_u8(skb, IFLA_BOND_USE_CARRIER, 1)) 737 goto nla_put_failure; 738 739 if (nla_put_u32(skb, IFLA_BOND_ARP_INTERVAL, 740 READ_ONCE(bond->params.arp_interval))) 741 goto nla_put_failure; 742 743 targets = nla_nest_start_noflag(skb, IFLA_BOND_ARP_IP_TARGET); 744 if (!targets) 745 goto nla_put_failure; 746 747 targets_added = 0; 748 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) { 749 __be32 t = READ_ONCE(bond->params.arp_targets[i]); 750 751 if (t) { 752 if (nla_put_be32(skb, i, t)) 753 goto nla_put_failure; 754 targets_added = 1; 755 } 756 } 757 758 if (targets_added) 759 nla_nest_end(skb, targets); 760 else 761 nla_nest_cancel(skb, targets); 762 763 if (nla_put_u32(skb, IFLA_BOND_ARP_VALIDATE, 764 READ_ONCE(bond->params.arp_validate))) 765 goto nla_put_failure; 766 767 if (nla_put_u32(skb, IFLA_BOND_ARP_ALL_TARGETS, 768 READ_ONCE(bond->params.arp_all_targets))) 769 goto nla_put_failure; 770 771 #if IS_ENABLED(CONFIG_IPV6) 772 targets = nla_nest_start(skb, IFLA_BOND_NS_IP6_TARGET); 773 if (!targets) 774 goto nla_put_failure; 775 776 targets_added = 0; 777 for (i = 0; i < BOND_MAX_NS_TARGETS; i++) { 778 /* Note: IPv6 addresses can not be read in an atomic READ_ONCE() yet. 779 * We accept this minor race for the moment. 780 */ 781 if (!ipv6_addr_any(&bond->params.ns_targets[i])) { 782 if (nla_put_in6_addr(skb, i, &bond->params.ns_targets[i])) 783 goto nla_put_failure; 784 targets_added = 1; 785 } 786 } 787 788 if (targets_added) 789 nla_nest_end(skb, targets); 790 else 791 nla_nest_cancel(skb, targets); 792 #endif 793 794 primary = rcu_dereference(bond->primary_slave); 795 if (primary && 796 nla_put_u32(skb, IFLA_BOND_PRIMARY, primary->dev->ifindex)) 797 goto nla_put_failure; 798 799 if (nla_put_u8(skb, IFLA_BOND_PRIMARY_RESELECT, 800 READ_ONCE(bond->params.primary_reselect))) 801 goto nla_put_failure; 802 803 if (nla_put_u8(skb, IFLA_BOND_FAIL_OVER_MAC, 804 READ_ONCE(bond->params.fail_over_mac))) 805 goto nla_put_failure; 806 807 if (nla_put_u8(skb, IFLA_BOND_XMIT_HASH_POLICY, 808 READ_ONCE(bond->params.xmit_policy))) 809 goto nla_put_failure; 810 811 if (nla_put_u32(skb, IFLA_BOND_RESEND_IGMP, 812 READ_ONCE(bond->params.resend_igmp))) 813 goto nla_put_failure; 814 815 if (nla_put_u8(skb, IFLA_BOND_NUM_PEER_NOTIF, 816 READ_ONCE(bond->params.num_peer_notif))) 817 goto nla_put_failure; 818 819 if (nla_put_u8(skb, IFLA_BOND_ALL_SLAVES_ACTIVE, 820 READ_ONCE(bond->params.all_slaves_active))) 821 goto nla_put_failure; 822 823 if (nla_put_u32(skb, IFLA_BOND_MIN_LINKS, 824 READ_ONCE(bond->params.min_links))) 825 goto nla_put_failure; 826 827 if (nla_put_u32(skb, IFLA_BOND_LP_INTERVAL, 828 READ_ONCE(bond->params.lp_interval))) 829 goto nla_put_failure; 830 831 if (nla_put_u32(skb, IFLA_BOND_PACKETS_PER_SLAVE, 832 READ_ONCE(bond->params.packets_per_slave))) 833 goto nla_put_failure; 834 835 if (nla_put_u8(skb, IFLA_BOND_AD_LACP_ACTIVE, 836 READ_ONCE(bond->params.lacp_active))) 837 goto nla_put_failure; 838 839 if (nla_put_u8(skb, IFLA_BOND_AD_LACP_RATE, 840 READ_ONCE(bond->params.lacp_fast))) 841 goto nla_put_failure; 842 843 if (nla_put_u8(skb, IFLA_BOND_AD_SELECT, 844 READ_ONCE(bond->params.ad_select))) 845 goto nla_put_failure; 846 847 if (nla_put_u8(skb, IFLA_BOND_TLB_DYNAMIC_LB, 848 READ_ONCE(bond->params.tlb_dynamic_lb))) 849 goto nla_put_failure; 850 851 if (nla_put_u8(skb, IFLA_BOND_MISSED_MAX, 852 READ_ONCE(bond->params.missed_max))) 853 goto nla_put_failure; 854 855 if (nla_put_u8(skb, IFLA_BOND_COUPLED_CONTROL, 856 READ_ONCE(bond->params.coupled_control))) 857 goto nla_put_failure; 858 859 if (nla_put_u8(skb, IFLA_BOND_BROADCAST_NEIGH, 860 READ_ONCE(bond->params.broadcast_neighbor))) 861 goto nla_put_failure; 862 863 if (nla_put_u8(skb, IFLA_BOND_LACP_STRICT, 864 READ_ONCE(bond->params.lacp_strict))) 865 goto nla_put_failure; 866 867 if (mode == BOND_MODE_8023AD) { 868 struct ad_info info; 869 870 if (capable(CAP_NET_ADMIN)) { 871 if (nla_put_u16(skb, IFLA_BOND_AD_ACTOR_SYS_PRIO, 872 READ_ONCE(bond->params.ad_actor_sys_prio))) 873 goto nla_put_failure; 874 875 if (nla_put_u16(skb, IFLA_BOND_AD_USER_PORT_KEY, 876 READ_ONCE(bond->params.ad_user_port_key))) 877 goto nla_put_failure; 878 879 /* Small race here, this is a minor trade off. */ 880 if (nla_put(skb, IFLA_BOND_AD_ACTOR_SYSTEM, 881 ETH_ALEN, &bond->params.ad_actor_system)) 882 goto nla_put_failure; 883 } 884 if (!__bond_3ad_get_active_agg_info(bond, &info)) { 885 struct nlattr *nest; 886 887 nest = nla_nest_start_noflag(skb, IFLA_BOND_AD_INFO); 888 if (!nest) 889 goto nla_put_failure; 890 891 if (nla_put_u16(skb, IFLA_BOND_AD_INFO_AGGREGATOR, 892 info.aggregator_id)) 893 goto nla_put_failure; 894 if (nla_put_u16(skb, IFLA_BOND_AD_INFO_NUM_PORTS, 895 info.ports)) 896 goto nla_put_failure; 897 if (nla_put_u16(skb, IFLA_BOND_AD_INFO_ACTOR_KEY, 898 info.actor_key)) 899 goto nla_put_failure; 900 if (nla_put_u16(skb, IFLA_BOND_AD_INFO_PARTNER_KEY, 901 info.partner_key)) 902 goto nla_put_failure; 903 if (nla_put(skb, IFLA_BOND_AD_INFO_PARTNER_MAC, 904 sizeof(info.partner_system), 905 &info.partner_system)) 906 goto nla_put_failure; 907 908 nla_nest_end(skb, nest); 909 } 910 } 911 912 rcu_read_unlock(); 913 return 0; 914 915 nla_put_failure: 916 rcu_read_unlock(); 917 return -EMSGSIZE; 918 } 919 920 static size_t bond_get_linkxstats_size(const struct net_device *dev, int attr) 921 { 922 switch (attr) { 923 case IFLA_STATS_LINK_XSTATS: 924 case IFLA_STATS_LINK_XSTATS_SLAVE: 925 break; 926 default: 927 return 0; 928 } 929 930 return bond_3ad_stats_size() + nla_total_size(0); 931 } 932 933 static int bond_fill_linkxstats(struct sk_buff *skb, 934 const struct net_device *dev, 935 int *prividx, int attr) 936 { 937 struct nlattr *nla __maybe_unused; 938 struct slave *slave = NULL; 939 struct nlattr *nest, *nest2; 940 struct bonding *bond; 941 942 switch (attr) { 943 case IFLA_STATS_LINK_XSTATS: 944 bond = netdev_priv(dev); 945 break; 946 case IFLA_STATS_LINK_XSTATS_SLAVE: 947 slave = bond_slave_get_rtnl(dev); 948 if (!slave) 949 return 0; 950 bond = slave->bond; 951 break; 952 default: 953 return -EINVAL; 954 } 955 956 nest = nla_nest_start_noflag(skb, LINK_XSTATS_TYPE_BOND); 957 if (!nest) 958 return -EMSGSIZE; 959 if (BOND_MODE(bond) == BOND_MODE_8023AD) { 960 struct bond_3ad_stats *stats; 961 962 if (slave) 963 stats = &SLAVE_AD_INFO(slave)->stats; 964 else 965 stats = &BOND_AD_INFO(bond).stats; 966 967 nest2 = nla_nest_start_noflag(skb, BOND_XSTATS_3AD); 968 if (!nest2) { 969 nla_nest_end(skb, nest); 970 return -EMSGSIZE; 971 } 972 973 if (bond_3ad_stats_fill(skb, stats)) { 974 nla_nest_cancel(skb, nest2); 975 nla_nest_end(skb, nest); 976 return -EMSGSIZE; 977 } 978 nla_nest_end(skb, nest2); 979 } 980 nla_nest_end(skb, nest); 981 982 return 0; 983 } 984 985 struct rtnl_link_ops bond_link_ops __read_mostly = { 986 .kind = "bond", 987 .priv_size = sizeof(struct bonding), 988 .setup = bond_setup, 989 .maxtype = IFLA_BOND_MAX, 990 .policy = bond_policy, 991 .validate = bond_validate, 992 .newlink = bond_newlink, 993 .changelink = bond_changelink, 994 .get_size = bond_get_size, 995 .fill_info = bond_fill_info, 996 .get_num_tx_queues = bond_get_num_tx_queues, 997 .get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number 998 as for TX queues */ 999 .fill_linkxstats = bond_fill_linkxstats, 1000 .get_linkxstats_size = bond_get_linkxstats_size, 1001 .slave_maxtype = IFLA_BOND_SLAVE_MAX, 1002 .slave_policy = bond_slave_policy, 1003 .slave_changelink = bond_slave_changelink, 1004 .get_slave_size = bond_get_slave_size, 1005 .fill_slave_info = bond_fill_slave_info, 1006 }; 1007 1008 int __init bond_netlink_init(void) 1009 { 1010 return rtnl_link_register(&bond_link_ops); 1011 } 1012 1013 void bond_netlink_fini(void) 1014 { 1015 rtnl_link_unregister(&bond_link_ops); 1016 } 1017 1018 MODULE_ALIAS_RTNL_LINK("bond"); 1019