1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Routing netlink socket interface: protocol independent part. 7 * 8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 * 15 * Fixes: 16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong. 17 */ 18 19 #include <linux/bitops.h> 20 #include <linux/errno.h> 21 #include <linux/module.h> 22 #include <linux/types.h> 23 #include <linux/socket.h> 24 #include <linux/kernel.h> 25 #include <linux/timer.h> 26 #include <linux/string.h> 27 #include <linux/sockios.h> 28 #include <linux/net.h> 29 #include <linux/fcntl.h> 30 #include <linux/mm.h> 31 #include <linux/slab.h> 32 #include <linux/interrupt.h> 33 #include <linux/capability.h> 34 #include <linux/skbuff.h> 35 #include <linux/init.h> 36 #include <linux/security.h> 37 #include <linux/mutex.h> 38 #include <linux/if_addr.h> 39 #include <linux/if_bridge.h> 40 #include <linux/if_vlan.h> 41 #include <linux/pci.h> 42 #include <linux/etherdevice.h> 43 #include <linux/bpf.h> 44 45 #include <linux/uaccess.h> 46 47 #include <linux/inet.h> 48 #include <linux/netdevice.h> 49 #include <net/switchdev.h> 50 #include <net/ip.h> 51 #include <net/protocol.h> 52 #include <net/arp.h> 53 #include <net/route.h> 54 #include <net/udp.h> 55 #include <net/tcp.h> 56 #include <net/sock.h> 57 #include <net/pkt_sched.h> 58 #include <net/fib_rules.h> 59 #include <net/rtnetlink.h> 60 #include <net/net_namespace.h> 61 62 struct rtnl_link { 63 rtnl_doit_func doit; 64 rtnl_dumpit_func dumpit; 65 unsigned int flags; 66 }; 67 68 static DEFINE_MUTEX(rtnl_mutex); 69 70 void rtnl_lock(void) 71 { 72 mutex_lock(&rtnl_mutex); 73 } 74 EXPORT_SYMBOL(rtnl_lock); 75 76 static struct sk_buff *defer_kfree_skb_list; 77 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) 78 { 79 if (head && tail) { 80 tail->next = defer_kfree_skb_list; 81 defer_kfree_skb_list = head; 82 } 83 } 84 EXPORT_SYMBOL(rtnl_kfree_skbs); 85 86 void __rtnl_unlock(void) 87 { 88 struct sk_buff *head = defer_kfree_skb_list; 89 90 defer_kfree_skb_list = NULL; 91 92 mutex_unlock(&rtnl_mutex); 93 94 while (head) { 95 struct sk_buff *next = head->next; 96 97 kfree_skb(head); 98 cond_resched(); 99 head = next; 100 } 101 } 102 103 void rtnl_unlock(void) 104 { 105 /* This fellow will unlock it for us. */ 106 netdev_run_todo(); 107 } 108 EXPORT_SYMBOL(rtnl_unlock); 109 110 int rtnl_trylock(void) 111 { 112 return mutex_trylock(&rtnl_mutex); 113 } 114 EXPORT_SYMBOL(rtnl_trylock); 115 116 int rtnl_is_locked(void) 117 { 118 return mutex_is_locked(&rtnl_mutex); 119 } 120 EXPORT_SYMBOL(rtnl_is_locked); 121 122 #ifdef CONFIG_PROVE_LOCKING 123 bool lockdep_rtnl_is_held(void) 124 { 125 return lockdep_is_held(&rtnl_mutex); 126 } 127 EXPORT_SYMBOL(lockdep_rtnl_is_held); 128 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 129 130 static struct rtnl_link __rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 131 static refcount_t rtnl_msg_handlers_ref[RTNL_FAMILY_MAX + 1]; 132 133 static inline int rtm_msgindex(int msgtype) 134 { 135 int msgindex = msgtype - RTM_BASE; 136 137 /* 138 * msgindex < 0 implies someone tried to register a netlink 139 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 140 * the message type has not been added to linux/rtnetlink.h 141 */ 142 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 143 144 return msgindex; 145 } 146 147 /** 148 * __rtnl_register - Register a rtnetlink message type 149 * @protocol: Protocol family or PF_UNSPEC 150 * @msgtype: rtnetlink message type 151 * @doit: Function pointer called for each request message 152 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 153 * @flags: rtnl_link_flags to modifiy behaviour of doit/dumpit functions 154 * 155 * Registers the specified function pointers (at least one of them has 156 * to be non-NULL) to be called whenever a request message for the 157 * specified protocol family and message type is received. 158 * 159 * The special protocol family PF_UNSPEC may be used to define fallback 160 * function pointers for the case when no entry for the specific protocol 161 * family exists. 162 * 163 * Returns 0 on success or a negative error code. 164 */ 165 int __rtnl_register(int protocol, int msgtype, 166 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 167 unsigned int flags) 168 { 169 struct rtnl_link *tab; 170 int msgindex; 171 172 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 173 msgindex = rtm_msgindex(msgtype); 174 175 tab = rcu_dereference_raw(rtnl_msg_handlers[protocol]); 176 if (tab == NULL) { 177 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 178 if (tab == NULL) 179 return -ENOBUFS; 180 181 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab); 182 } 183 184 if (doit) 185 tab[msgindex].doit = doit; 186 if (dumpit) 187 tab[msgindex].dumpit = dumpit; 188 tab[msgindex].flags |= flags; 189 190 return 0; 191 } 192 EXPORT_SYMBOL_GPL(__rtnl_register); 193 194 /** 195 * rtnl_register - Register a rtnetlink message type 196 * 197 * Identical to __rtnl_register() but panics on failure. This is useful 198 * as failure of this function is very unlikely, it can only happen due 199 * to lack of memory when allocating the chain to store all message 200 * handlers for a protocol. Meant for use in init functions where lack 201 * of memory implies no sense in continuing. 202 */ 203 void rtnl_register(int protocol, int msgtype, 204 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 205 unsigned int flags) 206 { 207 if (__rtnl_register(protocol, msgtype, doit, dumpit, flags) < 0) 208 panic("Unable to register rtnetlink message handler, " 209 "protocol = %d, message type = %d\n", 210 protocol, msgtype); 211 } 212 EXPORT_SYMBOL_GPL(rtnl_register); 213 214 /** 215 * rtnl_unregister - Unregister a rtnetlink message type 216 * @protocol: Protocol family or PF_UNSPEC 217 * @msgtype: rtnetlink message type 218 * 219 * Returns 0 on success or a negative error code. 220 */ 221 int rtnl_unregister(int protocol, int msgtype) 222 { 223 struct rtnl_link *handlers; 224 int msgindex; 225 226 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 227 msgindex = rtm_msgindex(msgtype); 228 229 rtnl_lock(); 230 handlers = rtnl_dereference(rtnl_msg_handlers[protocol]); 231 if (!handlers) { 232 rtnl_unlock(); 233 return -ENOENT; 234 } 235 236 handlers[msgindex].doit = NULL; 237 handlers[msgindex].dumpit = NULL; 238 handlers[msgindex].flags = 0; 239 rtnl_unlock(); 240 241 return 0; 242 } 243 EXPORT_SYMBOL_GPL(rtnl_unregister); 244 245 /** 246 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 247 * @protocol : Protocol family or PF_UNSPEC 248 * 249 * Identical to calling rtnl_unregster() for all registered message types 250 * of a certain protocol family. 251 */ 252 void rtnl_unregister_all(int protocol) 253 { 254 struct rtnl_link *handlers; 255 256 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 257 258 rtnl_lock(); 259 handlers = rtnl_dereference(rtnl_msg_handlers[protocol]); 260 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL); 261 rtnl_unlock(); 262 263 synchronize_net(); 264 265 while (refcount_read(&rtnl_msg_handlers_ref[protocol]) > 1) 266 schedule(); 267 kfree(handlers); 268 } 269 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 270 271 static LIST_HEAD(link_ops); 272 273 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 274 { 275 const struct rtnl_link_ops *ops; 276 277 list_for_each_entry(ops, &link_ops, list) { 278 if (!strcmp(ops->kind, kind)) 279 return ops; 280 } 281 return NULL; 282 } 283 284 /** 285 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 286 * @ops: struct rtnl_link_ops * to register 287 * 288 * The caller must hold the rtnl_mutex. This function should be used 289 * by drivers that create devices during module initialization. It 290 * must be called before registering the devices. 291 * 292 * Returns 0 on success or a negative error code. 293 */ 294 int __rtnl_link_register(struct rtnl_link_ops *ops) 295 { 296 if (rtnl_link_ops_get(ops->kind)) 297 return -EEXIST; 298 299 /* The check for setup is here because if ops 300 * does not have that filled up, it is not possible 301 * to use the ops for creating device. So do not 302 * fill up dellink as well. That disables rtnl_dellink. 303 */ 304 if (ops->setup && !ops->dellink) 305 ops->dellink = unregister_netdevice_queue; 306 307 list_add_tail(&ops->list, &link_ops); 308 return 0; 309 } 310 EXPORT_SYMBOL_GPL(__rtnl_link_register); 311 312 /** 313 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 314 * @ops: struct rtnl_link_ops * to register 315 * 316 * Returns 0 on success or a negative error code. 317 */ 318 int rtnl_link_register(struct rtnl_link_ops *ops) 319 { 320 int err; 321 322 rtnl_lock(); 323 err = __rtnl_link_register(ops); 324 rtnl_unlock(); 325 return err; 326 } 327 EXPORT_SYMBOL_GPL(rtnl_link_register); 328 329 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 330 { 331 struct net_device *dev; 332 LIST_HEAD(list_kill); 333 334 for_each_netdev(net, dev) { 335 if (dev->rtnl_link_ops == ops) 336 ops->dellink(dev, &list_kill); 337 } 338 unregister_netdevice_many(&list_kill); 339 } 340 341 /** 342 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 343 * @ops: struct rtnl_link_ops * to unregister 344 * 345 * The caller must hold the rtnl_mutex. 346 */ 347 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 348 { 349 struct net *net; 350 351 for_each_net(net) { 352 __rtnl_kill_links(net, ops); 353 } 354 list_del(&ops->list); 355 } 356 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 357 358 /* Return with the rtnl_lock held when there are no network 359 * devices unregistering in any network namespace. 360 */ 361 static void rtnl_lock_unregistering_all(void) 362 { 363 struct net *net; 364 bool unregistering; 365 DEFINE_WAIT_FUNC(wait, woken_wake_function); 366 367 add_wait_queue(&netdev_unregistering_wq, &wait); 368 for (;;) { 369 unregistering = false; 370 rtnl_lock(); 371 for_each_net(net) { 372 if (net->dev_unreg_count > 0) { 373 unregistering = true; 374 break; 375 } 376 } 377 if (!unregistering) 378 break; 379 __rtnl_unlock(); 380 381 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 382 } 383 remove_wait_queue(&netdev_unregistering_wq, &wait); 384 } 385 386 /** 387 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 388 * @ops: struct rtnl_link_ops * to unregister 389 */ 390 void rtnl_link_unregister(struct rtnl_link_ops *ops) 391 { 392 /* Close the race with cleanup_net() */ 393 mutex_lock(&net_mutex); 394 rtnl_lock_unregistering_all(); 395 __rtnl_link_unregister(ops); 396 rtnl_unlock(); 397 mutex_unlock(&net_mutex); 398 } 399 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 400 401 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 402 { 403 struct net_device *master_dev; 404 const struct rtnl_link_ops *ops; 405 size_t size = 0; 406 407 rcu_read_lock(); 408 409 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 410 if (!master_dev) 411 goto out; 412 413 ops = master_dev->rtnl_link_ops; 414 if (!ops || !ops->get_slave_size) 415 goto out; 416 /* IFLA_INFO_SLAVE_DATA + nested data */ 417 size = nla_total_size(sizeof(struct nlattr)) + 418 ops->get_slave_size(master_dev, dev); 419 420 out: 421 rcu_read_unlock(); 422 return size; 423 } 424 425 static size_t rtnl_link_get_size(const struct net_device *dev) 426 { 427 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 428 size_t size; 429 430 if (!ops) 431 return 0; 432 433 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 434 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 435 436 if (ops->get_size) 437 /* IFLA_INFO_DATA + nested data */ 438 size += nla_total_size(sizeof(struct nlattr)) + 439 ops->get_size(dev); 440 441 if (ops->get_xstats_size) 442 /* IFLA_INFO_XSTATS */ 443 size += nla_total_size(ops->get_xstats_size(dev)); 444 445 size += rtnl_link_get_slave_info_data_size(dev); 446 447 return size; 448 } 449 450 static LIST_HEAD(rtnl_af_ops); 451 452 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 453 { 454 const struct rtnl_af_ops *ops; 455 456 list_for_each_entry_rcu(ops, &rtnl_af_ops, list) { 457 if (ops->family == family) 458 return ops; 459 } 460 461 return NULL; 462 } 463 464 /** 465 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 466 * @ops: struct rtnl_af_ops * to register 467 * 468 * Returns 0 on success or a negative error code. 469 */ 470 void rtnl_af_register(struct rtnl_af_ops *ops) 471 { 472 rtnl_lock(); 473 list_add_tail_rcu(&ops->list, &rtnl_af_ops); 474 rtnl_unlock(); 475 } 476 EXPORT_SYMBOL_GPL(rtnl_af_register); 477 478 /** 479 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 480 * @ops: struct rtnl_af_ops * to unregister 481 */ 482 void rtnl_af_unregister(struct rtnl_af_ops *ops) 483 { 484 rtnl_lock(); 485 list_del_rcu(&ops->list); 486 rtnl_unlock(); 487 488 synchronize_rcu(); 489 } 490 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 491 492 static size_t rtnl_link_get_af_size(const struct net_device *dev, 493 u32 ext_filter_mask) 494 { 495 struct rtnl_af_ops *af_ops; 496 size_t size; 497 498 /* IFLA_AF_SPEC */ 499 size = nla_total_size(sizeof(struct nlattr)); 500 501 rcu_read_lock(); 502 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 503 if (af_ops->get_link_af_size) { 504 /* AF_* + nested data */ 505 size += nla_total_size(sizeof(struct nlattr)) + 506 af_ops->get_link_af_size(dev, ext_filter_mask); 507 } 508 } 509 rcu_read_unlock(); 510 511 return size; 512 } 513 514 static bool rtnl_have_link_slave_info(const struct net_device *dev) 515 { 516 struct net_device *master_dev; 517 bool ret = false; 518 519 rcu_read_lock(); 520 521 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 522 if (master_dev && master_dev->rtnl_link_ops) 523 ret = true; 524 rcu_read_unlock(); 525 return ret; 526 } 527 528 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 529 const struct net_device *dev) 530 { 531 struct net_device *master_dev; 532 const struct rtnl_link_ops *ops; 533 struct nlattr *slave_data; 534 int err; 535 536 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 537 if (!master_dev) 538 return 0; 539 ops = master_dev->rtnl_link_ops; 540 if (!ops) 541 return 0; 542 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 543 return -EMSGSIZE; 544 if (ops->fill_slave_info) { 545 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 546 if (!slave_data) 547 return -EMSGSIZE; 548 err = ops->fill_slave_info(skb, master_dev, dev); 549 if (err < 0) 550 goto err_cancel_slave_data; 551 nla_nest_end(skb, slave_data); 552 } 553 return 0; 554 555 err_cancel_slave_data: 556 nla_nest_cancel(skb, slave_data); 557 return err; 558 } 559 560 static int rtnl_link_info_fill(struct sk_buff *skb, 561 const struct net_device *dev) 562 { 563 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 564 struct nlattr *data; 565 int err; 566 567 if (!ops) 568 return 0; 569 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 570 return -EMSGSIZE; 571 if (ops->fill_xstats) { 572 err = ops->fill_xstats(skb, dev); 573 if (err < 0) 574 return err; 575 } 576 if (ops->fill_info) { 577 data = nla_nest_start(skb, IFLA_INFO_DATA); 578 if (data == NULL) 579 return -EMSGSIZE; 580 err = ops->fill_info(skb, dev); 581 if (err < 0) 582 goto err_cancel_data; 583 nla_nest_end(skb, data); 584 } 585 return 0; 586 587 err_cancel_data: 588 nla_nest_cancel(skb, data); 589 return err; 590 } 591 592 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 593 { 594 struct nlattr *linkinfo; 595 int err = -EMSGSIZE; 596 597 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 598 if (linkinfo == NULL) 599 goto out; 600 601 err = rtnl_link_info_fill(skb, dev); 602 if (err < 0) 603 goto err_cancel_link; 604 605 err = rtnl_link_slave_info_fill(skb, dev); 606 if (err < 0) 607 goto err_cancel_link; 608 609 nla_nest_end(skb, linkinfo); 610 return 0; 611 612 err_cancel_link: 613 nla_nest_cancel(skb, linkinfo); 614 out: 615 return err; 616 } 617 618 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 619 { 620 struct sock *rtnl = net->rtnl; 621 int err = 0; 622 623 NETLINK_CB(skb).dst_group = group; 624 if (echo) 625 refcount_inc(&skb->users); 626 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 627 if (echo) 628 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 629 return err; 630 } 631 632 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 633 { 634 struct sock *rtnl = net->rtnl; 635 636 return nlmsg_unicast(rtnl, skb, pid); 637 } 638 EXPORT_SYMBOL(rtnl_unicast); 639 640 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 641 struct nlmsghdr *nlh, gfp_t flags) 642 { 643 struct sock *rtnl = net->rtnl; 644 int report = 0; 645 646 if (nlh) 647 report = nlmsg_report(nlh); 648 649 nlmsg_notify(rtnl, skb, pid, group, report, flags); 650 } 651 EXPORT_SYMBOL(rtnl_notify); 652 653 void rtnl_set_sk_err(struct net *net, u32 group, int error) 654 { 655 struct sock *rtnl = net->rtnl; 656 657 netlink_set_err(rtnl, 0, group, error); 658 } 659 EXPORT_SYMBOL(rtnl_set_sk_err); 660 661 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 662 { 663 struct nlattr *mx; 664 int i, valid = 0; 665 666 mx = nla_nest_start(skb, RTA_METRICS); 667 if (mx == NULL) 668 return -ENOBUFS; 669 670 for (i = 0; i < RTAX_MAX; i++) { 671 if (metrics[i]) { 672 if (i == RTAX_CC_ALGO - 1) { 673 char tmp[TCP_CA_NAME_MAX], *name; 674 675 name = tcp_ca_get_name_by_key(metrics[i], tmp); 676 if (!name) 677 continue; 678 if (nla_put_string(skb, i + 1, name)) 679 goto nla_put_failure; 680 } else if (i == RTAX_FEATURES - 1) { 681 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 682 683 if (!user_features) 684 continue; 685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 686 if (nla_put_u32(skb, i + 1, user_features)) 687 goto nla_put_failure; 688 } else { 689 if (nla_put_u32(skb, i + 1, metrics[i])) 690 goto nla_put_failure; 691 } 692 valid++; 693 } 694 } 695 696 if (!valid) { 697 nla_nest_cancel(skb, mx); 698 return 0; 699 } 700 701 return nla_nest_end(skb, mx); 702 703 nla_put_failure: 704 nla_nest_cancel(skb, mx); 705 return -EMSGSIZE; 706 } 707 EXPORT_SYMBOL(rtnetlink_put_metrics); 708 709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 710 long expires, u32 error) 711 { 712 struct rta_cacheinfo ci = { 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 714 .rta_used = dst->__use, 715 .rta_clntref = atomic_read(&(dst->__refcnt)), 716 .rta_error = error, 717 .rta_id = id, 718 }; 719 720 if (expires) { 721 unsigned long clock; 722 723 clock = jiffies_to_clock_t(abs(expires)); 724 clock = min_t(unsigned long, clock, INT_MAX); 725 ci.rta_expires = (expires > 0) ? clock : -clock; 726 } 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 728 } 729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 730 731 static void set_operstate(struct net_device *dev, unsigned char transition) 732 { 733 unsigned char operstate = dev->operstate; 734 735 switch (transition) { 736 case IF_OPER_UP: 737 if ((operstate == IF_OPER_DORMANT || 738 operstate == IF_OPER_UNKNOWN) && 739 !netif_dormant(dev)) 740 operstate = IF_OPER_UP; 741 break; 742 743 case IF_OPER_DORMANT: 744 if (operstate == IF_OPER_UP || 745 operstate == IF_OPER_UNKNOWN) 746 operstate = IF_OPER_DORMANT; 747 break; 748 } 749 750 if (dev->operstate != operstate) { 751 write_lock_bh(&dev_base_lock); 752 dev->operstate = operstate; 753 write_unlock_bh(&dev_base_lock); 754 netdev_state_change(dev); 755 } 756 } 757 758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 759 { 760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 762 } 763 764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 765 const struct ifinfomsg *ifm) 766 { 767 unsigned int flags = ifm->ifi_flags; 768 769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 770 if (ifm->ifi_change) 771 flags = (flags & ifm->ifi_change) | 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 773 774 return flags; 775 } 776 777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 778 const struct rtnl_link_stats64 *b) 779 { 780 a->rx_packets = b->rx_packets; 781 a->tx_packets = b->tx_packets; 782 a->rx_bytes = b->rx_bytes; 783 a->tx_bytes = b->tx_bytes; 784 a->rx_errors = b->rx_errors; 785 a->tx_errors = b->tx_errors; 786 a->rx_dropped = b->rx_dropped; 787 a->tx_dropped = b->tx_dropped; 788 789 a->multicast = b->multicast; 790 a->collisions = b->collisions; 791 792 a->rx_length_errors = b->rx_length_errors; 793 a->rx_over_errors = b->rx_over_errors; 794 a->rx_crc_errors = b->rx_crc_errors; 795 a->rx_frame_errors = b->rx_frame_errors; 796 a->rx_fifo_errors = b->rx_fifo_errors; 797 a->rx_missed_errors = b->rx_missed_errors; 798 799 a->tx_aborted_errors = b->tx_aborted_errors; 800 a->tx_carrier_errors = b->tx_carrier_errors; 801 a->tx_fifo_errors = b->tx_fifo_errors; 802 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 803 a->tx_window_errors = b->tx_window_errors; 804 805 a->rx_compressed = b->rx_compressed; 806 a->tx_compressed = b->tx_compressed; 807 808 a->rx_nohandler = b->rx_nohandler; 809 } 810 811 /* All VF info */ 812 static inline int rtnl_vfinfo_size(const struct net_device *dev, 813 u32 ext_filter_mask) 814 { 815 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) { 816 int num_vfs = dev_num_vf(dev->dev.parent); 817 size_t size = nla_total_size(0); 818 size += num_vfs * 819 (nla_total_size(0) + 820 nla_total_size(sizeof(struct ifla_vf_mac)) + 821 nla_total_size(sizeof(struct ifla_vf_vlan)) + 822 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ 823 nla_total_size(MAX_VLAN_LIST_LEN * 824 sizeof(struct ifla_vf_vlan_info)) + 825 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 826 nla_total_size(sizeof(struct ifla_vf_tx_rate)) + 827 nla_total_size(sizeof(struct ifla_vf_rate)) + 828 nla_total_size(sizeof(struct ifla_vf_link_state)) + 829 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 830 nla_total_size(0) + /* nest IFLA_VF_STATS */ 831 /* IFLA_VF_STATS_RX_PACKETS */ 832 nla_total_size_64bit(sizeof(__u64)) + 833 /* IFLA_VF_STATS_TX_PACKETS */ 834 nla_total_size_64bit(sizeof(__u64)) + 835 /* IFLA_VF_STATS_RX_BYTES */ 836 nla_total_size_64bit(sizeof(__u64)) + 837 /* IFLA_VF_STATS_TX_BYTES */ 838 nla_total_size_64bit(sizeof(__u64)) + 839 /* IFLA_VF_STATS_BROADCAST */ 840 nla_total_size_64bit(sizeof(__u64)) + 841 /* IFLA_VF_STATS_MULTICAST */ 842 nla_total_size_64bit(sizeof(__u64)) + 843 nla_total_size(sizeof(struct ifla_vf_trust))); 844 return size; 845 } else 846 return 0; 847 } 848 849 static size_t rtnl_port_size(const struct net_device *dev, 850 u32 ext_filter_mask) 851 { 852 size_t port_size = nla_total_size(4) /* PORT_VF */ 853 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 854 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 855 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 856 + nla_total_size(1) /* PROT_VDP_REQUEST */ 857 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 858 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 859 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 860 + port_size; 861 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 862 + port_size; 863 864 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 865 !(ext_filter_mask & RTEXT_FILTER_VF)) 866 return 0; 867 if (dev_num_vf(dev->dev.parent)) 868 return port_self_size + vf_ports_size + 869 vf_port_size * dev_num_vf(dev->dev.parent); 870 else 871 return port_self_size; 872 } 873 874 static size_t rtnl_xdp_size(void) 875 { 876 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ 877 nla_total_size(1) + /* XDP_ATTACHED */ 878 nla_total_size(4); /* XDP_PROG_ID */ 879 880 return xdp_size; 881 } 882 883 static noinline size_t if_nlmsg_size(const struct net_device *dev, 884 u32 ext_filter_mask) 885 { 886 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 887 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 888 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 889 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 890 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 891 + nla_total_size(sizeof(struct rtnl_link_stats)) 892 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 893 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 894 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 895 + nla_total_size(4) /* IFLA_TXQLEN */ 896 + nla_total_size(4) /* IFLA_WEIGHT */ 897 + nla_total_size(4) /* IFLA_MTU */ 898 + nla_total_size(4) /* IFLA_LINK */ 899 + nla_total_size(4) /* IFLA_MASTER */ 900 + nla_total_size(1) /* IFLA_CARRIER */ 901 + nla_total_size(4) /* IFLA_PROMISCUITY */ 902 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 903 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 904 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 905 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 906 + nla_total_size(1) /* IFLA_OPERSTATE */ 907 + nla_total_size(1) /* IFLA_LINKMODE */ 908 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 909 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 910 + nla_total_size(4) /* IFLA_GROUP */ 911 + nla_total_size(ext_filter_mask 912 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 913 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 914 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 915 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 916 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 917 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 918 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 919 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 920 + rtnl_xdp_size() /* IFLA_XDP */ 921 + nla_total_size(4) /* IFLA_EVENT */ 922 + nla_total_size(4) /* IFLA_NEW_NETNSID */ 923 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 924 925 } 926 927 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 928 { 929 struct nlattr *vf_ports; 930 struct nlattr *vf_port; 931 int vf; 932 int err; 933 934 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 935 if (!vf_ports) 936 return -EMSGSIZE; 937 938 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 939 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 940 if (!vf_port) 941 goto nla_put_failure; 942 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 943 goto nla_put_failure; 944 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 945 if (err == -EMSGSIZE) 946 goto nla_put_failure; 947 if (err) { 948 nla_nest_cancel(skb, vf_port); 949 continue; 950 } 951 nla_nest_end(skb, vf_port); 952 } 953 954 nla_nest_end(skb, vf_ports); 955 956 return 0; 957 958 nla_put_failure: 959 nla_nest_cancel(skb, vf_ports); 960 return -EMSGSIZE; 961 } 962 963 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 964 { 965 struct nlattr *port_self; 966 int err; 967 968 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 969 if (!port_self) 970 return -EMSGSIZE; 971 972 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 973 if (err) { 974 nla_nest_cancel(skb, port_self); 975 return (err == -EMSGSIZE) ? err : 0; 976 } 977 978 nla_nest_end(skb, port_self); 979 980 return 0; 981 } 982 983 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 984 u32 ext_filter_mask) 985 { 986 int err; 987 988 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 989 !(ext_filter_mask & RTEXT_FILTER_VF)) 990 return 0; 991 992 err = rtnl_port_self_fill(skb, dev); 993 if (err) 994 return err; 995 996 if (dev_num_vf(dev->dev.parent)) { 997 err = rtnl_vf_ports_fill(skb, dev); 998 if (err) 999 return err; 1000 } 1001 1002 return 0; 1003 } 1004 1005 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1006 { 1007 int err; 1008 struct netdev_phys_item_id ppid; 1009 1010 err = dev_get_phys_port_id(dev, &ppid); 1011 if (err) { 1012 if (err == -EOPNOTSUPP) 1013 return 0; 1014 return err; 1015 } 1016 1017 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1018 return -EMSGSIZE; 1019 1020 return 0; 1021 } 1022 1023 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1024 { 1025 char name[IFNAMSIZ]; 1026 int err; 1027 1028 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1029 if (err) { 1030 if (err == -EOPNOTSUPP) 1031 return 0; 1032 return err; 1033 } 1034 1035 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name)) 1036 return -EMSGSIZE; 1037 1038 return 0; 1039 } 1040 1041 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1042 { 1043 int err; 1044 struct switchdev_attr attr = { 1045 .orig_dev = dev, 1046 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1047 .flags = SWITCHDEV_F_NO_RECURSE, 1048 }; 1049 1050 err = switchdev_port_attr_get(dev, &attr); 1051 if (err) { 1052 if (err == -EOPNOTSUPP) 1053 return 0; 1054 return err; 1055 } 1056 1057 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1058 attr.u.ppid.id)) 1059 return -EMSGSIZE; 1060 1061 return 0; 1062 } 1063 1064 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1065 struct net_device *dev) 1066 { 1067 struct rtnl_link_stats64 *sp; 1068 struct nlattr *attr; 1069 1070 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1071 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1072 if (!attr) 1073 return -EMSGSIZE; 1074 1075 sp = nla_data(attr); 1076 dev_get_stats(dev, sp); 1077 1078 attr = nla_reserve(skb, IFLA_STATS, 1079 sizeof(struct rtnl_link_stats)); 1080 if (!attr) 1081 return -EMSGSIZE; 1082 1083 copy_rtnl_link_stats(nla_data(attr), sp); 1084 1085 return 0; 1086 } 1087 1088 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1089 struct net_device *dev, 1090 int vfs_num, 1091 struct nlattr *vfinfo) 1092 { 1093 struct ifla_vf_rss_query_en vf_rss_query_en; 1094 struct nlattr *vf, *vfstats, *vfvlanlist; 1095 struct ifla_vf_link_state vf_linkstate; 1096 struct ifla_vf_vlan_info vf_vlan_info; 1097 struct ifla_vf_spoofchk vf_spoofchk; 1098 struct ifla_vf_tx_rate vf_tx_rate; 1099 struct ifla_vf_stats vf_stats; 1100 struct ifla_vf_trust vf_trust; 1101 struct ifla_vf_vlan vf_vlan; 1102 struct ifla_vf_rate vf_rate; 1103 struct ifla_vf_mac vf_mac; 1104 struct ifla_vf_info ivi; 1105 1106 memset(&ivi, 0, sizeof(ivi)); 1107 1108 /* Not all SR-IOV capable drivers support the 1109 * spoofcheck and "RSS query enable" query. Preset to 1110 * -1 so the user space tool can detect that the driver 1111 * didn't report anything. 1112 */ 1113 ivi.spoofchk = -1; 1114 ivi.rss_query_en = -1; 1115 ivi.trusted = -1; 1116 /* The default value for VF link state is "auto" 1117 * IFLA_VF_LINK_STATE_AUTO which equals zero 1118 */ 1119 ivi.linkstate = 0; 1120 /* VLAN Protocol by default is 802.1Q */ 1121 ivi.vlan_proto = htons(ETH_P_8021Q); 1122 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1123 return 0; 1124 1125 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1126 1127 vf_mac.vf = 1128 vf_vlan.vf = 1129 vf_vlan_info.vf = 1130 vf_rate.vf = 1131 vf_tx_rate.vf = 1132 vf_spoofchk.vf = 1133 vf_linkstate.vf = 1134 vf_rss_query_en.vf = 1135 vf_trust.vf = ivi.vf; 1136 1137 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1138 vf_vlan.vlan = ivi.vlan; 1139 vf_vlan.qos = ivi.qos; 1140 vf_vlan_info.vlan = ivi.vlan; 1141 vf_vlan_info.qos = ivi.qos; 1142 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1143 vf_tx_rate.rate = ivi.max_tx_rate; 1144 vf_rate.min_tx_rate = ivi.min_tx_rate; 1145 vf_rate.max_tx_rate = ivi.max_tx_rate; 1146 vf_spoofchk.setting = ivi.spoofchk; 1147 vf_linkstate.link_state = ivi.linkstate; 1148 vf_rss_query_en.setting = ivi.rss_query_en; 1149 vf_trust.setting = ivi.trusted; 1150 vf = nla_nest_start(skb, IFLA_VF_INFO); 1151 if (!vf) 1152 goto nla_put_vfinfo_failure; 1153 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1154 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1155 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1156 &vf_rate) || 1157 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1158 &vf_tx_rate) || 1159 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1160 &vf_spoofchk) || 1161 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1162 &vf_linkstate) || 1163 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1164 sizeof(vf_rss_query_en), 1165 &vf_rss_query_en) || 1166 nla_put(skb, IFLA_VF_TRUST, 1167 sizeof(vf_trust), &vf_trust)) 1168 goto nla_put_vf_failure; 1169 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST); 1170 if (!vfvlanlist) 1171 goto nla_put_vf_failure; 1172 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1173 &vf_vlan_info)) { 1174 nla_nest_cancel(skb, vfvlanlist); 1175 goto nla_put_vf_failure; 1176 } 1177 nla_nest_end(skb, vfvlanlist); 1178 memset(&vf_stats, 0, sizeof(vf_stats)); 1179 if (dev->netdev_ops->ndo_get_vf_stats) 1180 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1181 &vf_stats); 1182 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1183 if (!vfstats) 1184 goto nla_put_vf_failure; 1185 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1186 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1187 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1188 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1189 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1190 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1191 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1192 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1193 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1194 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1195 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1196 vf_stats.multicast, IFLA_VF_STATS_PAD)) { 1197 nla_nest_cancel(skb, vfstats); 1198 goto nla_put_vf_failure; 1199 } 1200 nla_nest_end(skb, vfstats); 1201 nla_nest_end(skb, vf); 1202 return 0; 1203 1204 nla_put_vf_failure: 1205 nla_nest_cancel(skb, vf); 1206 nla_put_vfinfo_failure: 1207 nla_nest_cancel(skb, vfinfo); 1208 return -EMSGSIZE; 1209 } 1210 1211 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb, 1212 struct net_device *dev, 1213 u32 ext_filter_mask) 1214 { 1215 struct nlattr *vfinfo; 1216 int i, num_vfs; 1217 1218 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0)) 1219 return 0; 1220 1221 num_vfs = dev_num_vf(dev->dev.parent); 1222 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs)) 1223 return -EMSGSIZE; 1224 1225 if (!dev->netdev_ops->ndo_get_vf_config) 1226 return 0; 1227 1228 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1229 if (!vfinfo) 1230 return -EMSGSIZE; 1231 1232 for (i = 0; i < num_vfs; i++) { 1233 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1234 return -EMSGSIZE; 1235 } 1236 1237 nla_nest_end(skb, vfinfo); 1238 return 0; 1239 } 1240 1241 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1242 { 1243 struct rtnl_link_ifmap map; 1244 1245 memset(&map, 0, sizeof(map)); 1246 map.mem_start = dev->mem_start; 1247 map.mem_end = dev->mem_end; 1248 map.base_addr = dev->base_addr; 1249 map.irq = dev->irq; 1250 map.dma = dev->dma; 1251 map.port = dev->if_port; 1252 1253 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1254 return -EMSGSIZE; 1255 1256 return 0; 1257 } 1258 1259 static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id) 1260 { 1261 const struct net_device_ops *ops = dev->netdev_ops; 1262 const struct bpf_prog *generic_xdp_prog; 1263 1264 ASSERT_RTNL(); 1265 1266 *prog_id = 0; 1267 generic_xdp_prog = rtnl_dereference(dev->xdp_prog); 1268 if (generic_xdp_prog) { 1269 *prog_id = generic_xdp_prog->aux->id; 1270 return XDP_ATTACHED_SKB; 1271 } 1272 if (!ops->ndo_xdp) 1273 return XDP_ATTACHED_NONE; 1274 1275 return __dev_xdp_attached(dev, ops->ndo_xdp, prog_id); 1276 } 1277 1278 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1279 { 1280 struct nlattr *xdp; 1281 u32 prog_id; 1282 int err; 1283 1284 xdp = nla_nest_start(skb, IFLA_XDP); 1285 if (!xdp) 1286 return -EMSGSIZE; 1287 1288 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, 1289 rtnl_xdp_attached_mode(dev, &prog_id)); 1290 if (err) 1291 goto err_cancel; 1292 1293 if (prog_id) { 1294 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id); 1295 if (err) 1296 goto err_cancel; 1297 } 1298 1299 nla_nest_end(skb, xdp); 1300 return 0; 1301 1302 err_cancel: 1303 nla_nest_cancel(skb, xdp); 1304 return err; 1305 } 1306 1307 static u32 rtnl_get_event(unsigned long event) 1308 { 1309 u32 rtnl_event_type = IFLA_EVENT_NONE; 1310 1311 switch (event) { 1312 case NETDEV_REBOOT: 1313 rtnl_event_type = IFLA_EVENT_REBOOT; 1314 break; 1315 case NETDEV_FEAT_CHANGE: 1316 rtnl_event_type = IFLA_EVENT_FEATURES; 1317 break; 1318 case NETDEV_BONDING_FAILOVER: 1319 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER; 1320 break; 1321 case NETDEV_NOTIFY_PEERS: 1322 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS; 1323 break; 1324 case NETDEV_RESEND_IGMP: 1325 rtnl_event_type = IFLA_EVENT_IGMP_RESEND; 1326 break; 1327 case NETDEV_CHANGEINFODATA: 1328 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS; 1329 break; 1330 default: 1331 break; 1332 } 1333 1334 return rtnl_event_type; 1335 } 1336 1337 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev) 1338 { 1339 const struct net_device *upper_dev; 1340 int ret = 0; 1341 1342 rcu_read_lock(); 1343 1344 upper_dev = netdev_master_upper_dev_get_rcu(dev); 1345 if (upper_dev) 1346 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex); 1347 1348 rcu_read_unlock(); 1349 return ret; 1350 } 1351 1352 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev) 1353 { 1354 int ifindex = dev_get_iflink(dev); 1355 1356 if (dev->ifindex == ifindex) 1357 return 0; 1358 1359 return nla_put_u32(skb, IFLA_LINK, ifindex); 1360 } 1361 1362 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb, 1363 struct net_device *dev) 1364 { 1365 char buf[IFALIASZ]; 1366 int ret; 1367 1368 ret = dev_get_alias(dev, buf, sizeof(buf)); 1369 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0; 1370 } 1371 1372 static int rtnl_fill_link_netnsid(struct sk_buff *skb, 1373 const struct net_device *dev) 1374 { 1375 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) { 1376 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1377 1378 if (!net_eq(dev_net(dev), link_net)) { 1379 int id = peernet2id_alloc(dev_net(dev), link_net); 1380 1381 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1382 return -EMSGSIZE; 1383 } 1384 } 1385 1386 return 0; 1387 } 1388 1389 static int rtnl_fill_link_af(struct sk_buff *skb, 1390 const struct net_device *dev, 1391 u32 ext_filter_mask) 1392 { 1393 const struct rtnl_af_ops *af_ops; 1394 struct nlattr *af_spec; 1395 1396 af_spec = nla_nest_start(skb, IFLA_AF_SPEC); 1397 if (!af_spec) 1398 return -EMSGSIZE; 1399 1400 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 1401 struct nlattr *af; 1402 int err; 1403 1404 if (!af_ops->fill_link_af) 1405 continue; 1406 1407 af = nla_nest_start(skb, af_ops->family); 1408 if (!af) 1409 return -EMSGSIZE; 1410 1411 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1412 /* 1413 * Caller may return ENODATA to indicate that there 1414 * was no data to be dumped. This is not an error, it 1415 * means we should trim the attribute header and 1416 * continue. 1417 */ 1418 if (err == -ENODATA) 1419 nla_nest_cancel(skb, af); 1420 else if (err < 0) 1421 return -EMSGSIZE; 1422 1423 nla_nest_end(skb, af); 1424 } 1425 1426 nla_nest_end(skb, af_spec); 1427 return 0; 1428 } 1429 1430 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1431 int type, u32 pid, u32 seq, u32 change, 1432 unsigned int flags, u32 ext_filter_mask, 1433 u32 event, int *new_nsid) 1434 { 1435 struct ifinfomsg *ifm; 1436 struct nlmsghdr *nlh; 1437 1438 ASSERT_RTNL(); 1439 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1440 if (nlh == NULL) 1441 return -EMSGSIZE; 1442 1443 ifm = nlmsg_data(nlh); 1444 ifm->ifi_family = AF_UNSPEC; 1445 ifm->__ifi_pad = 0; 1446 ifm->ifi_type = dev->type; 1447 ifm->ifi_index = dev->ifindex; 1448 ifm->ifi_flags = dev_get_flags(dev); 1449 ifm->ifi_change = change; 1450 1451 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1452 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1453 nla_put_u8(skb, IFLA_OPERSTATE, 1454 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1455 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1456 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1457 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1458 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1459 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1460 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1461 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1462 #ifdef CONFIG_RPS 1463 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1464 #endif 1465 nla_put_iflink(skb, dev) || 1466 put_master_ifindex(skb, dev) || 1467 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1468 (dev->qdisc && 1469 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1470 nla_put_ifalias(skb, dev) || 1471 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1472 atomic_read(&dev->carrier_changes)) || 1473 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1474 goto nla_put_failure; 1475 1476 if (event != IFLA_EVENT_NONE) { 1477 if (nla_put_u32(skb, IFLA_EVENT, event)) 1478 goto nla_put_failure; 1479 } 1480 1481 if (rtnl_fill_link_ifmap(skb, dev)) 1482 goto nla_put_failure; 1483 1484 if (dev->addr_len) { 1485 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1486 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1487 goto nla_put_failure; 1488 } 1489 1490 if (rtnl_phys_port_id_fill(skb, dev)) 1491 goto nla_put_failure; 1492 1493 if (rtnl_phys_port_name_fill(skb, dev)) 1494 goto nla_put_failure; 1495 1496 if (rtnl_phys_switch_id_fill(skb, dev)) 1497 goto nla_put_failure; 1498 1499 if (rtnl_fill_stats(skb, dev)) 1500 goto nla_put_failure; 1501 1502 if (rtnl_fill_vf(skb, dev, ext_filter_mask)) 1503 goto nla_put_failure; 1504 1505 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1506 goto nla_put_failure; 1507 1508 if (rtnl_xdp_fill(skb, dev)) 1509 goto nla_put_failure; 1510 1511 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1512 if (rtnl_link_fill(skb, dev) < 0) 1513 goto nla_put_failure; 1514 } 1515 1516 if (rtnl_fill_link_netnsid(skb, dev)) 1517 goto nla_put_failure; 1518 1519 if (new_nsid && 1520 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0) 1521 goto nla_put_failure; 1522 1523 rcu_read_lock(); 1524 if (rtnl_fill_link_af(skb, dev, ext_filter_mask)) 1525 goto nla_put_failure_rcu; 1526 rcu_read_unlock(); 1527 1528 nlmsg_end(skb, nlh); 1529 return 0; 1530 1531 nla_put_failure_rcu: 1532 rcu_read_unlock(); 1533 nla_put_failure: 1534 nlmsg_cancel(skb, nlh); 1535 return -EMSGSIZE; 1536 } 1537 1538 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1539 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1540 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1541 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1542 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1543 [IFLA_MTU] = { .type = NLA_U32 }, 1544 [IFLA_LINK] = { .type = NLA_U32 }, 1545 [IFLA_MASTER] = { .type = NLA_U32 }, 1546 [IFLA_CARRIER] = { .type = NLA_U8 }, 1547 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1548 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1549 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1550 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1551 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1552 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1553 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1554 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to 1555 * allow 0-length string (needed to remove an alias). 1556 */ 1557 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 }, 1558 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1559 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1560 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1561 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1562 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1563 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1564 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1565 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1566 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1567 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1568 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1569 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1570 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1571 [IFLA_XDP] = { .type = NLA_NESTED }, 1572 [IFLA_EVENT] = { .type = NLA_U32 }, 1573 [IFLA_GROUP] = { .type = NLA_U32 }, 1574 }; 1575 1576 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1577 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1578 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1579 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1580 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1581 }; 1582 1583 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1584 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1585 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1586 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1587 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1588 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1589 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1590 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1591 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1592 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1593 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1594 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1595 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1596 }; 1597 1598 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1599 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1600 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1601 .len = PORT_PROFILE_MAX }, 1602 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1603 .len = PORT_UUID_MAX }, 1604 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1605 .len = PORT_UUID_MAX }, 1606 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1607 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1608 1609 /* Unused, but we need to keep it here since user space could 1610 * fill it. It's also broken with regard to NLA_BINARY use in 1611 * combination with structs. 1612 */ 1613 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1614 .len = sizeof(struct ifla_port_vsi) }, 1615 }; 1616 1617 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1618 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1619 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1620 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1621 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 }, 1622 }; 1623 1624 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1625 { 1626 const struct rtnl_link_ops *ops = NULL; 1627 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1628 1629 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, 1630 ifla_info_policy, NULL) < 0) 1631 return NULL; 1632 1633 if (linfo[IFLA_INFO_KIND]) { 1634 char kind[MODULE_NAME_LEN]; 1635 1636 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1637 ops = rtnl_link_ops_get(kind); 1638 } 1639 1640 return ops; 1641 } 1642 1643 static bool link_master_filtered(struct net_device *dev, int master_idx) 1644 { 1645 struct net_device *master; 1646 1647 if (!master_idx) 1648 return false; 1649 1650 master = netdev_master_upper_dev_get(dev); 1651 if (!master || master->ifindex != master_idx) 1652 return true; 1653 1654 return false; 1655 } 1656 1657 static bool link_kind_filtered(const struct net_device *dev, 1658 const struct rtnl_link_ops *kind_ops) 1659 { 1660 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1661 return true; 1662 1663 return false; 1664 } 1665 1666 static bool link_dump_filtered(struct net_device *dev, 1667 int master_idx, 1668 const struct rtnl_link_ops *kind_ops) 1669 { 1670 if (link_master_filtered(dev, master_idx) || 1671 link_kind_filtered(dev, kind_ops)) 1672 return true; 1673 1674 return false; 1675 } 1676 1677 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1678 { 1679 struct net *net = sock_net(skb->sk); 1680 int h, s_h; 1681 int idx = 0, s_idx; 1682 struct net_device *dev; 1683 struct hlist_head *head; 1684 struct nlattr *tb[IFLA_MAX+1]; 1685 u32 ext_filter_mask = 0; 1686 const struct rtnl_link_ops *kind_ops = NULL; 1687 unsigned int flags = NLM_F_MULTI; 1688 int master_idx = 0; 1689 int err; 1690 int hdrlen; 1691 1692 s_h = cb->args[0]; 1693 s_idx = cb->args[1]; 1694 1695 /* A hack to preserve kernel<->userspace interface. 1696 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1697 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1698 * what iproute2 < v3.9.0 used. 1699 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1700 * attribute, its netlink message is shorter than struct ifinfomsg. 1701 */ 1702 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1703 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1704 1705 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, 1706 ifla_policy, NULL) >= 0) { 1707 if (tb[IFLA_EXT_MASK]) 1708 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1709 1710 if (tb[IFLA_MASTER]) 1711 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1712 1713 if (tb[IFLA_LINKINFO]) 1714 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1715 1716 if (master_idx || kind_ops) 1717 flags |= NLM_F_DUMP_FILTERED; 1718 } 1719 1720 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1721 idx = 0; 1722 head = &net->dev_index_head[h]; 1723 hlist_for_each_entry(dev, head, index_hlist) { 1724 if (link_dump_filtered(dev, master_idx, kind_ops)) 1725 goto cont; 1726 if (idx < s_idx) 1727 goto cont; 1728 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1729 NETLINK_CB(cb->skb).portid, 1730 cb->nlh->nlmsg_seq, 0, 1731 flags, 1732 ext_filter_mask, 0, NULL); 1733 1734 if (err < 0) { 1735 if (likely(skb->len)) 1736 goto out; 1737 1738 goto out_err; 1739 } 1740 cont: 1741 idx++; 1742 } 1743 } 1744 out: 1745 err = skb->len; 1746 out_err: 1747 cb->args[1] = idx; 1748 cb->args[0] = h; 1749 cb->seq = net->dev_base_seq; 1750 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1751 1752 return err; 1753 } 1754 1755 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 1756 struct netlink_ext_ack *exterr) 1757 { 1758 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr); 1759 } 1760 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1761 1762 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1763 { 1764 struct net *net; 1765 /* Examine the link attributes and figure out which 1766 * network namespace we are talking about. 1767 */ 1768 if (tb[IFLA_NET_NS_PID]) 1769 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1770 else if (tb[IFLA_NET_NS_FD]) 1771 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1772 else 1773 net = get_net(src_net); 1774 return net; 1775 } 1776 EXPORT_SYMBOL(rtnl_link_get_net); 1777 1778 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1779 { 1780 if (dev) { 1781 if (tb[IFLA_ADDRESS] && 1782 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1783 return -EINVAL; 1784 1785 if (tb[IFLA_BROADCAST] && 1786 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1787 return -EINVAL; 1788 } 1789 1790 if (tb[IFLA_AF_SPEC]) { 1791 struct nlattr *af; 1792 int rem, err; 1793 1794 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1795 const struct rtnl_af_ops *af_ops; 1796 1797 rcu_read_lock(); 1798 af_ops = rtnl_af_lookup(nla_type(af)); 1799 if (!af_ops) { 1800 rcu_read_unlock(); 1801 return -EAFNOSUPPORT; 1802 } 1803 1804 if (!af_ops->set_link_af) { 1805 rcu_read_unlock(); 1806 return -EOPNOTSUPP; 1807 } 1808 1809 if (af_ops->validate_link_af) { 1810 err = af_ops->validate_link_af(dev, af); 1811 if (err < 0) { 1812 rcu_read_unlock(); 1813 return err; 1814 } 1815 } 1816 1817 rcu_read_unlock(); 1818 } 1819 } 1820 1821 return 0; 1822 } 1823 1824 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1825 int guid_type) 1826 { 1827 const struct net_device_ops *ops = dev->netdev_ops; 1828 1829 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1830 } 1831 1832 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1833 { 1834 if (dev->type != ARPHRD_INFINIBAND) 1835 return -EOPNOTSUPP; 1836 1837 return handle_infiniband_guid(dev, ivt, guid_type); 1838 } 1839 1840 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1841 { 1842 const struct net_device_ops *ops = dev->netdev_ops; 1843 int err = -EINVAL; 1844 1845 if (tb[IFLA_VF_MAC]) { 1846 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1847 1848 err = -EOPNOTSUPP; 1849 if (ops->ndo_set_vf_mac) 1850 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1851 ivm->mac); 1852 if (err < 0) 1853 return err; 1854 } 1855 1856 if (tb[IFLA_VF_VLAN]) { 1857 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1858 1859 err = -EOPNOTSUPP; 1860 if (ops->ndo_set_vf_vlan) 1861 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1862 ivv->qos, 1863 htons(ETH_P_8021Q)); 1864 if (err < 0) 1865 return err; 1866 } 1867 1868 if (tb[IFLA_VF_VLAN_LIST]) { 1869 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 1870 struct nlattr *attr; 1871 int rem, len = 0; 1872 1873 err = -EOPNOTSUPP; 1874 if (!ops->ndo_set_vf_vlan) 1875 return err; 1876 1877 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 1878 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 1879 nla_len(attr) < NLA_HDRLEN) { 1880 return -EINVAL; 1881 } 1882 if (len >= MAX_VLAN_LIST_LEN) 1883 return -EOPNOTSUPP; 1884 ivvl[len] = nla_data(attr); 1885 1886 len++; 1887 } 1888 if (len == 0) 1889 return -EINVAL; 1890 1891 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 1892 ivvl[0]->qos, ivvl[0]->vlan_proto); 1893 if (err < 0) 1894 return err; 1895 } 1896 1897 if (tb[IFLA_VF_TX_RATE]) { 1898 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1899 struct ifla_vf_info ivf; 1900 1901 err = -EOPNOTSUPP; 1902 if (ops->ndo_get_vf_config) 1903 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1904 if (err < 0) 1905 return err; 1906 1907 err = -EOPNOTSUPP; 1908 if (ops->ndo_set_vf_rate) 1909 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1910 ivf.min_tx_rate, 1911 ivt->rate); 1912 if (err < 0) 1913 return err; 1914 } 1915 1916 if (tb[IFLA_VF_RATE]) { 1917 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1918 1919 err = -EOPNOTSUPP; 1920 if (ops->ndo_set_vf_rate) 1921 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1922 ivt->min_tx_rate, 1923 ivt->max_tx_rate); 1924 if (err < 0) 1925 return err; 1926 } 1927 1928 if (tb[IFLA_VF_SPOOFCHK]) { 1929 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1930 1931 err = -EOPNOTSUPP; 1932 if (ops->ndo_set_vf_spoofchk) 1933 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1934 ivs->setting); 1935 if (err < 0) 1936 return err; 1937 } 1938 1939 if (tb[IFLA_VF_LINK_STATE]) { 1940 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1941 1942 err = -EOPNOTSUPP; 1943 if (ops->ndo_set_vf_link_state) 1944 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1945 ivl->link_state); 1946 if (err < 0) 1947 return err; 1948 } 1949 1950 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1951 struct ifla_vf_rss_query_en *ivrssq_en; 1952 1953 err = -EOPNOTSUPP; 1954 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1955 if (ops->ndo_set_vf_rss_query_en) 1956 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1957 ivrssq_en->setting); 1958 if (err < 0) 1959 return err; 1960 } 1961 1962 if (tb[IFLA_VF_TRUST]) { 1963 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1964 1965 err = -EOPNOTSUPP; 1966 if (ops->ndo_set_vf_trust) 1967 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1968 if (err < 0) 1969 return err; 1970 } 1971 1972 if (tb[IFLA_VF_IB_NODE_GUID]) { 1973 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1974 1975 if (!ops->ndo_set_vf_guid) 1976 return -EOPNOTSUPP; 1977 1978 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1979 } 1980 1981 if (tb[IFLA_VF_IB_PORT_GUID]) { 1982 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1983 1984 if (!ops->ndo_set_vf_guid) 1985 return -EOPNOTSUPP; 1986 1987 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1988 } 1989 1990 return err; 1991 } 1992 1993 static int do_set_master(struct net_device *dev, int ifindex, 1994 struct netlink_ext_ack *extack) 1995 { 1996 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1997 const struct net_device_ops *ops; 1998 int err; 1999 2000 if (upper_dev) { 2001 if (upper_dev->ifindex == ifindex) 2002 return 0; 2003 ops = upper_dev->netdev_ops; 2004 if (ops->ndo_del_slave) { 2005 err = ops->ndo_del_slave(upper_dev, dev); 2006 if (err) 2007 return err; 2008 } else { 2009 return -EOPNOTSUPP; 2010 } 2011 } 2012 2013 if (ifindex) { 2014 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 2015 if (!upper_dev) 2016 return -EINVAL; 2017 ops = upper_dev->netdev_ops; 2018 if (ops->ndo_add_slave) { 2019 err = ops->ndo_add_slave(upper_dev, dev, extack); 2020 if (err) 2021 return err; 2022 } else { 2023 return -EOPNOTSUPP; 2024 } 2025 } 2026 return 0; 2027 } 2028 2029 #define DO_SETLINK_MODIFIED 0x01 2030 /* notify flag means notify + modified. */ 2031 #define DO_SETLINK_NOTIFY 0x03 2032 static int do_setlink(const struct sk_buff *skb, 2033 struct net_device *dev, struct ifinfomsg *ifm, 2034 struct netlink_ext_ack *extack, 2035 struct nlattr **tb, char *ifname, int status) 2036 { 2037 const struct net_device_ops *ops = dev->netdev_ops; 2038 int err; 2039 2040 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 2041 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 2042 if (IS_ERR(net)) { 2043 err = PTR_ERR(net); 2044 goto errout; 2045 } 2046 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 2047 put_net(net); 2048 err = -EPERM; 2049 goto errout; 2050 } 2051 err = dev_change_net_namespace(dev, net, ifname); 2052 put_net(net); 2053 if (err) 2054 goto errout; 2055 status |= DO_SETLINK_MODIFIED; 2056 } 2057 2058 if (tb[IFLA_MAP]) { 2059 struct rtnl_link_ifmap *u_map; 2060 struct ifmap k_map; 2061 2062 if (!ops->ndo_set_config) { 2063 err = -EOPNOTSUPP; 2064 goto errout; 2065 } 2066 2067 if (!netif_device_present(dev)) { 2068 err = -ENODEV; 2069 goto errout; 2070 } 2071 2072 u_map = nla_data(tb[IFLA_MAP]); 2073 k_map.mem_start = (unsigned long) u_map->mem_start; 2074 k_map.mem_end = (unsigned long) u_map->mem_end; 2075 k_map.base_addr = (unsigned short) u_map->base_addr; 2076 k_map.irq = (unsigned char) u_map->irq; 2077 k_map.dma = (unsigned char) u_map->dma; 2078 k_map.port = (unsigned char) u_map->port; 2079 2080 err = ops->ndo_set_config(dev, &k_map); 2081 if (err < 0) 2082 goto errout; 2083 2084 status |= DO_SETLINK_NOTIFY; 2085 } 2086 2087 if (tb[IFLA_ADDRESS]) { 2088 struct sockaddr *sa; 2089 int len; 2090 2091 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len, 2092 sizeof(*sa)); 2093 sa = kmalloc(len, GFP_KERNEL); 2094 if (!sa) { 2095 err = -ENOMEM; 2096 goto errout; 2097 } 2098 sa->sa_family = dev->type; 2099 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 2100 dev->addr_len); 2101 err = dev_set_mac_address(dev, sa); 2102 kfree(sa); 2103 if (err) 2104 goto errout; 2105 status |= DO_SETLINK_MODIFIED; 2106 } 2107 2108 if (tb[IFLA_MTU]) { 2109 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 2110 if (err < 0) 2111 goto errout; 2112 status |= DO_SETLINK_MODIFIED; 2113 } 2114 2115 if (tb[IFLA_GROUP]) { 2116 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2117 status |= DO_SETLINK_NOTIFY; 2118 } 2119 2120 /* 2121 * Interface selected by interface index but interface 2122 * name provided implies that a name change has been 2123 * requested. 2124 */ 2125 if (ifm->ifi_index > 0 && ifname[0]) { 2126 err = dev_change_name(dev, ifname); 2127 if (err < 0) 2128 goto errout; 2129 status |= DO_SETLINK_MODIFIED; 2130 } 2131 2132 if (tb[IFLA_IFALIAS]) { 2133 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2134 nla_len(tb[IFLA_IFALIAS])); 2135 if (err < 0) 2136 goto errout; 2137 status |= DO_SETLINK_NOTIFY; 2138 } 2139 2140 if (tb[IFLA_BROADCAST]) { 2141 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2142 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2143 } 2144 2145 if (ifm->ifi_flags || ifm->ifi_change) { 2146 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2147 if (err < 0) 2148 goto errout; 2149 } 2150 2151 if (tb[IFLA_MASTER]) { 2152 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 2153 if (err) 2154 goto errout; 2155 status |= DO_SETLINK_MODIFIED; 2156 } 2157 2158 if (tb[IFLA_CARRIER]) { 2159 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2160 if (err) 2161 goto errout; 2162 status |= DO_SETLINK_MODIFIED; 2163 } 2164 2165 if (tb[IFLA_TXQLEN]) { 2166 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]); 2167 unsigned int orig_len = dev->tx_queue_len; 2168 2169 if (dev->tx_queue_len ^ value) { 2170 dev->tx_queue_len = value; 2171 err = call_netdevice_notifiers( 2172 NETDEV_CHANGE_TX_QUEUE_LEN, dev); 2173 err = notifier_to_errno(err); 2174 if (err) { 2175 dev->tx_queue_len = orig_len; 2176 goto errout; 2177 } 2178 status |= DO_SETLINK_MODIFIED; 2179 } 2180 } 2181 2182 if (tb[IFLA_OPERSTATE]) 2183 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2184 2185 if (tb[IFLA_LINKMODE]) { 2186 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2187 2188 write_lock_bh(&dev_base_lock); 2189 if (dev->link_mode ^ value) 2190 status |= DO_SETLINK_NOTIFY; 2191 dev->link_mode = value; 2192 write_unlock_bh(&dev_base_lock); 2193 } 2194 2195 if (tb[IFLA_VFINFO_LIST]) { 2196 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2197 struct nlattr *attr; 2198 int rem; 2199 2200 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2201 if (nla_type(attr) != IFLA_VF_INFO || 2202 nla_len(attr) < NLA_HDRLEN) { 2203 err = -EINVAL; 2204 goto errout; 2205 } 2206 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 2207 ifla_vf_policy, NULL); 2208 if (err < 0) 2209 goto errout; 2210 err = do_setvfinfo(dev, vfinfo); 2211 if (err < 0) 2212 goto errout; 2213 status |= DO_SETLINK_NOTIFY; 2214 } 2215 } 2216 err = 0; 2217 2218 if (tb[IFLA_VF_PORTS]) { 2219 struct nlattr *port[IFLA_PORT_MAX+1]; 2220 struct nlattr *attr; 2221 int vf; 2222 int rem; 2223 2224 err = -EOPNOTSUPP; 2225 if (!ops->ndo_set_vf_port) 2226 goto errout; 2227 2228 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2229 if (nla_type(attr) != IFLA_VF_PORT || 2230 nla_len(attr) < NLA_HDRLEN) { 2231 err = -EINVAL; 2232 goto errout; 2233 } 2234 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 2235 ifla_port_policy, NULL); 2236 if (err < 0) 2237 goto errout; 2238 if (!port[IFLA_PORT_VF]) { 2239 err = -EOPNOTSUPP; 2240 goto errout; 2241 } 2242 vf = nla_get_u32(port[IFLA_PORT_VF]); 2243 err = ops->ndo_set_vf_port(dev, vf, port); 2244 if (err < 0) 2245 goto errout; 2246 status |= DO_SETLINK_NOTIFY; 2247 } 2248 } 2249 err = 0; 2250 2251 if (tb[IFLA_PORT_SELF]) { 2252 struct nlattr *port[IFLA_PORT_MAX+1]; 2253 2254 err = nla_parse_nested(port, IFLA_PORT_MAX, 2255 tb[IFLA_PORT_SELF], ifla_port_policy, 2256 NULL); 2257 if (err < 0) 2258 goto errout; 2259 2260 err = -EOPNOTSUPP; 2261 if (ops->ndo_set_vf_port) 2262 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2263 if (err < 0) 2264 goto errout; 2265 status |= DO_SETLINK_NOTIFY; 2266 } 2267 2268 if (tb[IFLA_AF_SPEC]) { 2269 struct nlattr *af; 2270 int rem; 2271 2272 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2273 const struct rtnl_af_ops *af_ops; 2274 2275 rcu_read_lock(); 2276 2277 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af)))); 2278 2279 err = af_ops->set_link_af(dev, af); 2280 if (err < 0) { 2281 rcu_read_unlock(); 2282 goto errout; 2283 } 2284 2285 rcu_read_unlock(); 2286 status |= DO_SETLINK_NOTIFY; 2287 } 2288 } 2289 err = 0; 2290 2291 if (tb[IFLA_PROTO_DOWN]) { 2292 err = dev_change_proto_down(dev, 2293 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2294 if (err) 2295 goto errout; 2296 status |= DO_SETLINK_NOTIFY; 2297 } 2298 2299 if (tb[IFLA_XDP]) { 2300 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2301 u32 xdp_flags = 0; 2302 2303 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2304 ifla_xdp_policy, NULL); 2305 if (err < 0) 2306 goto errout; 2307 2308 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) { 2309 err = -EINVAL; 2310 goto errout; 2311 } 2312 2313 if (xdp[IFLA_XDP_FLAGS]) { 2314 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2315 if (xdp_flags & ~XDP_FLAGS_MASK) { 2316 err = -EINVAL; 2317 goto errout; 2318 } 2319 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) { 2320 err = -EINVAL; 2321 goto errout; 2322 } 2323 } 2324 2325 if (xdp[IFLA_XDP_FD]) { 2326 err = dev_change_xdp_fd(dev, extack, 2327 nla_get_s32(xdp[IFLA_XDP_FD]), 2328 xdp_flags); 2329 if (err) 2330 goto errout; 2331 status |= DO_SETLINK_NOTIFY; 2332 } 2333 } 2334 2335 errout: 2336 if (status & DO_SETLINK_MODIFIED) { 2337 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY) 2338 netdev_state_change(dev); 2339 2340 if (err < 0) 2341 net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n", 2342 dev->name); 2343 } 2344 2345 return err; 2346 } 2347 2348 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2349 struct netlink_ext_ack *extack) 2350 { 2351 struct net *net = sock_net(skb->sk); 2352 struct ifinfomsg *ifm; 2353 struct net_device *dev; 2354 int err; 2355 struct nlattr *tb[IFLA_MAX+1]; 2356 char ifname[IFNAMSIZ]; 2357 2358 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, 2359 extack); 2360 if (err < 0) 2361 goto errout; 2362 2363 if (tb[IFLA_IFNAME]) 2364 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2365 else 2366 ifname[0] = '\0'; 2367 2368 err = -EINVAL; 2369 ifm = nlmsg_data(nlh); 2370 if (ifm->ifi_index > 0) 2371 dev = __dev_get_by_index(net, ifm->ifi_index); 2372 else if (tb[IFLA_IFNAME]) 2373 dev = __dev_get_by_name(net, ifname); 2374 else 2375 goto errout; 2376 2377 if (dev == NULL) { 2378 err = -ENODEV; 2379 goto errout; 2380 } 2381 2382 err = validate_linkmsg(dev, tb); 2383 if (err < 0) 2384 goto errout; 2385 2386 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0); 2387 errout: 2388 return err; 2389 } 2390 2391 static int rtnl_group_dellink(const struct net *net, int group) 2392 { 2393 struct net_device *dev, *aux; 2394 LIST_HEAD(list_kill); 2395 bool found = false; 2396 2397 if (!group) 2398 return -EPERM; 2399 2400 for_each_netdev(net, dev) { 2401 if (dev->group == group) { 2402 const struct rtnl_link_ops *ops; 2403 2404 found = true; 2405 ops = dev->rtnl_link_ops; 2406 if (!ops || !ops->dellink) 2407 return -EOPNOTSUPP; 2408 } 2409 } 2410 2411 if (!found) 2412 return -ENODEV; 2413 2414 for_each_netdev_safe(net, dev, aux) { 2415 if (dev->group == group) { 2416 const struct rtnl_link_ops *ops; 2417 2418 ops = dev->rtnl_link_ops; 2419 ops->dellink(dev, &list_kill); 2420 } 2421 } 2422 unregister_netdevice_many(&list_kill); 2423 2424 return 0; 2425 } 2426 2427 int rtnl_delete_link(struct net_device *dev) 2428 { 2429 const struct rtnl_link_ops *ops; 2430 LIST_HEAD(list_kill); 2431 2432 ops = dev->rtnl_link_ops; 2433 if (!ops || !ops->dellink) 2434 return -EOPNOTSUPP; 2435 2436 ops->dellink(dev, &list_kill); 2437 unregister_netdevice_many(&list_kill); 2438 2439 return 0; 2440 } 2441 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2442 2443 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 2444 struct netlink_ext_ack *extack) 2445 { 2446 struct net *net = sock_net(skb->sk); 2447 struct net_device *dev; 2448 struct ifinfomsg *ifm; 2449 char ifname[IFNAMSIZ]; 2450 struct nlattr *tb[IFLA_MAX+1]; 2451 int err; 2452 2453 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2454 if (err < 0) 2455 return err; 2456 2457 if (tb[IFLA_IFNAME]) 2458 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2459 2460 ifm = nlmsg_data(nlh); 2461 if (ifm->ifi_index > 0) 2462 dev = __dev_get_by_index(net, ifm->ifi_index); 2463 else if (tb[IFLA_IFNAME]) 2464 dev = __dev_get_by_name(net, ifname); 2465 else if (tb[IFLA_GROUP]) 2466 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2467 else 2468 return -EINVAL; 2469 2470 if (!dev) 2471 return -ENODEV; 2472 2473 return rtnl_delete_link(dev); 2474 } 2475 2476 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2477 { 2478 unsigned int old_flags; 2479 int err; 2480 2481 old_flags = dev->flags; 2482 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2483 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2484 if (err < 0) 2485 return err; 2486 } 2487 2488 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2489 2490 __dev_notify_flags(dev, old_flags, ~0U); 2491 return 0; 2492 } 2493 EXPORT_SYMBOL(rtnl_configure_link); 2494 2495 struct net_device *rtnl_create_link(struct net *net, 2496 const char *ifname, unsigned char name_assign_type, 2497 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2498 { 2499 struct net_device *dev; 2500 unsigned int num_tx_queues = 1; 2501 unsigned int num_rx_queues = 1; 2502 2503 if (tb[IFLA_NUM_TX_QUEUES]) 2504 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2505 else if (ops->get_num_tx_queues) 2506 num_tx_queues = ops->get_num_tx_queues(); 2507 2508 if (tb[IFLA_NUM_RX_QUEUES]) 2509 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2510 else if (ops->get_num_rx_queues) 2511 num_rx_queues = ops->get_num_rx_queues(); 2512 2513 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2514 ops->setup, num_tx_queues, num_rx_queues); 2515 if (!dev) 2516 return ERR_PTR(-ENOMEM); 2517 2518 dev_net_set(dev, net); 2519 dev->rtnl_link_ops = ops; 2520 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2521 2522 if (tb[IFLA_MTU]) 2523 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2524 if (tb[IFLA_ADDRESS]) { 2525 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2526 nla_len(tb[IFLA_ADDRESS])); 2527 dev->addr_assign_type = NET_ADDR_SET; 2528 } 2529 if (tb[IFLA_BROADCAST]) 2530 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2531 nla_len(tb[IFLA_BROADCAST])); 2532 if (tb[IFLA_TXQLEN]) 2533 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2534 if (tb[IFLA_OPERSTATE]) 2535 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2536 if (tb[IFLA_LINKMODE]) 2537 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2538 if (tb[IFLA_GROUP]) 2539 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2540 2541 return dev; 2542 } 2543 EXPORT_SYMBOL(rtnl_create_link); 2544 2545 static int rtnl_group_changelink(const struct sk_buff *skb, 2546 struct net *net, int group, 2547 struct ifinfomsg *ifm, 2548 struct netlink_ext_ack *extack, 2549 struct nlattr **tb) 2550 { 2551 struct net_device *dev, *aux; 2552 int err; 2553 2554 for_each_netdev_safe(net, dev, aux) { 2555 if (dev->group == group) { 2556 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0); 2557 if (err < 0) 2558 return err; 2559 } 2560 } 2561 2562 return 0; 2563 } 2564 2565 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2566 struct netlink_ext_ack *extack) 2567 { 2568 struct net *net = sock_net(skb->sk); 2569 const struct rtnl_link_ops *ops; 2570 const struct rtnl_link_ops *m_ops = NULL; 2571 struct net_device *dev; 2572 struct net_device *master_dev = NULL; 2573 struct ifinfomsg *ifm; 2574 char kind[MODULE_NAME_LEN]; 2575 char ifname[IFNAMSIZ]; 2576 struct nlattr *tb[IFLA_MAX+1]; 2577 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2578 unsigned char name_assign_type = NET_NAME_USER; 2579 int err; 2580 2581 #ifdef CONFIG_MODULES 2582 replay: 2583 #endif 2584 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2585 if (err < 0) 2586 return err; 2587 2588 if (tb[IFLA_IFNAME]) 2589 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2590 else 2591 ifname[0] = '\0'; 2592 2593 ifm = nlmsg_data(nlh); 2594 if (ifm->ifi_index > 0) 2595 dev = __dev_get_by_index(net, ifm->ifi_index); 2596 else { 2597 if (ifname[0]) 2598 dev = __dev_get_by_name(net, ifname); 2599 else 2600 dev = NULL; 2601 } 2602 2603 if (dev) { 2604 master_dev = netdev_master_upper_dev_get(dev); 2605 if (master_dev) 2606 m_ops = master_dev->rtnl_link_ops; 2607 } 2608 2609 err = validate_linkmsg(dev, tb); 2610 if (err < 0) 2611 return err; 2612 2613 if (tb[IFLA_LINKINFO]) { 2614 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2615 tb[IFLA_LINKINFO], ifla_info_policy, 2616 NULL); 2617 if (err < 0) 2618 return err; 2619 } else 2620 memset(linkinfo, 0, sizeof(linkinfo)); 2621 2622 if (linkinfo[IFLA_INFO_KIND]) { 2623 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2624 ops = rtnl_link_ops_get(kind); 2625 } else { 2626 kind[0] = '\0'; 2627 ops = NULL; 2628 } 2629 2630 if (1) { 2631 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2632 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2633 struct nlattr **data = NULL; 2634 struct nlattr **slave_data = NULL; 2635 struct net *dest_net, *link_net = NULL; 2636 2637 if (ops) { 2638 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2639 err = nla_parse_nested(attr, ops->maxtype, 2640 linkinfo[IFLA_INFO_DATA], 2641 ops->policy, NULL); 2642 if (err < 0) 2643 return err; 2644 data = attr; 2645 } 2646 if (ops->validate) { 2647 err = ops->validate(tb, data, extack); 2648 if (err < 0) 2649 return err; 2650 } 2651 } 2652 2653 if (m_ops) { 2654 if (m_ops->slave_maxtype && 2655 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2656 err = nla_parse_nested(slave_attr, 2657 m_ops->slave_maxtype, 2658 linkinfo[IFLA_INFO_SLAVE_DATA], 2659 m_ops->slave_policy, 2660 NULL); 2661 if (err < 0) 2662 return err; 2663 slave_data = slave_attr; 2664 } 2665 } 2666 2667 if (dev) { 2668 int status = 0; 2669 2670 if (nlh->nlmsg_flags & NLM_F_EXCL) 2671 return -EEXIST; 2672 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2673 return -EOPNOTSUPP; 2674 2675 if (linkinfo[IFLA_INFO_DATA]) { 2676 if (!ops || ops != dev->rtnl_link_ops || 2677 !ops->changelink) 2678 return -EOPNOTSUPP; 2679 2680 err = ops->changelink(dev, tb, data, extack); 2681 if (err < 0) 2682 return err; 2683 status |= DO_SETLINK_NOTIFY; 2684 } 2685 2686 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2687 if (!m_ops || !m_ops->slave_changelink) 2688 return -EOPNOTSUPP; 2689 2690 err = m_ops->slave_changelink(master_dev, dev, 2691 tb, slave_data, 2692 extack); 2693 if (err < 0) 2694 return err; 2695 status |= DO_SETLINK_NOTIFY; 2696 } 2697 2698 return do_setlink(skb, dev, ifm, extack, tb, ifname, 2699 status); 2700 } 2701 2702 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2703 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2704 return rtnl_group_changelink(skb, net, 2705 nla_get_u32(tb[IFLA_GROUP]), 2706 ifm, extack, tb); 2707 return -ENODEV; 2708 } 2709 2710 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 2711 return -EOPNOTSUPP; 2712 2713 if (!ops) { 2714 #ifdef CONFIG_MODULES 2715 if (kind[0]) { 2716 __rtnl_unlock(); 2717 request_module("rtnl-link-%s", kind); 2718 rtnl_lock(); 2719 ops = rtnl_link_ops_get(kind); 2720 if (ops) 2721 goto replay; 2722 } 2723 #endif 2724 return -EOPNOTSUPP; 2725 } 2726 2727 if (!ops->setup) 2728 return -EOPNOTSUPP; 2729 2730 if (!ifname[0]) { 2731 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2732 name_assign_type = NET_NAME_ENUM; 2733 } 2734 2735 dest_net = rtnl_link_get_net(net, tb); 2736 if (IS_ERR(dest_net)) 2737 return PTR_ERR(dest_net); 2738 2739 err = -EPERM; 2740 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2741 goto out; 2742 2743 if (tb[IFLA_LINK_NETNSID]) { 2744 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2745 2746 link_net = get_net_ns_by_id(dest_net, id); 2747 if (!link_net) { 2748 err = -EINVAL; 2749 goto out; 2750 } 2751 err = -EPERM; 2752 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2753 goto out; 2754 } 2755 2756 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2757 name_assign_type, ops, tb); 2758 if (IS_ERR(dev)) { 2759 err = PTR_ERR(dev); 2760 goto out; 2761 } 2762 2763 dev->ifindex = ifm->ifi_index; 2764 2765 if (ops->newlink) { 2766 err = ops->newlink(link_net ? : net, dev, tb, data, 2767 extack); 2768 /* Drivers should call free_netdev() in ->destructor 2769 * and unregister it on failure after registration 2770 * so that device could be finally freed in rtnl_unlock. 2771 */ 2772 if (err < 0) { 2773 /* If device is not registered at all, free it now */ 2774 if (dev->reg_state == NETREG_UNINITIALIZED) 2775 free_netdev(dev); 2776 goto out; 2777 } 2778 } else { 2779 err = register_netdevice(dev); 2780 if (err < 0) { 2781 free_netdev(dev); 2782 goto out; 2783 } 2784 } 2785 err = rtnl_configure_link(dev, ifm); 2786 if (err < 0) 2787 goto out_unregister; 2788 if (link_net) { 2789 err = dev_change_net_namespace(dev, dest_net, ifname); 2790 if (err < 0) 2791 goto out_unregister; 2792 } 2793 if (tb[IFLA_MASTER]) { 2794 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), 2795 extack); 2796 if (err) 2797 goto out_unregister; 2798 } 2799 out: 2800 if (link_net) 2801 put_net(link_net); 2802 put_net(dest_net); 2803 return err; 2804 out_unregister: 2805 if (ops->newlink) { 2806 LIST_HEAD(list_kill); 2807 2808 ops->dellink(dev, &list_kill); 2809 unregister_netdevice_many(&list_kill); 2810 } else { 2811 unregister_netdevice(dev); 2812 } 2813 goto out; 2814 } 2815 } 2816 2817 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2818 struct netlink_ext_ack *extack) 2819 { 2820 struct net *net = sock_net(skb->sk); 2821 struct ifinfomsg *ifm; 2822 char ifname[IFNAMSIZ]; 2823 struct nlattr *tb[IFLA_MAX+1]; 2824 struct net_device *dev = NULL; 2825 struct sk_buff *nskb; 2826 int err; 2827 u32 ext_filter_mask = 0; 2828 2829 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2830 if (err < 0) 2831 return err; 2832 2833 if (tb[IFLA_IFNAME]) 2834 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2835 2836 if (tb[IFLA_EXT_MASK]) 2837 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2838 2839 ifm = nlmsg_data(nlh); 2840 if (ifm->ifi_index > 0) 2841 dev = __dev_get_by_index(net, ifm->ifi_index); 2842 else if (tb[IFLA_IFNAME]) 2843 dev = __dev_get_by_name(net, ifname); 2844 else 2845 return -EINVAL; 2846 2847 if (dev == NULL) 2848 return -ENODEV; 2849 2850 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2851 if (nskb == NULL) 2852 return -ENOBUFS; 2853 2854 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2855 nlh->nlmsg_seq, 0, 0, ext_filter_mask, 0, NULL); 2856 if (err < 0) { 2857 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2858 WARN_ON(err == -EMSGSIZE); 2859 kfree_skb(nskb); 2860 } else 2861 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2862 2863 return err; 2864 } 2865 2866 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2867 { 2868 struct net *net = sock_net(skb->sk); 2869 struct net_device *dev; 2870 struct nlattr *tb[IFLA_MAX+1]; 2871 u32 ext_filter_mask = 0; 2872 u16 min_ifinfo_dump_size = 0; 2873 int hdrlen; 2874 2875 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2876 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2877 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2878 2879 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { 2880 if (tb[IFLA_EXT_MASK]) 2881 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2882 } 2883 2884 if (!ext_filter_mask) 2885 return NLMSG_GOODSIZE; 2886 /* 2887 * traverse the list of net devices and compute the minimum 2888 * buffer size based upon the filter mask. 2889 */ 2890 rcu_read_lock(); 2891 for_each_netdev_rcu(net, dev) { 2892 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2893 if_nlmsg_size(dev, 2894 ext_filter_mask)); 2895 } 2896 rcu_read_unlock(); 2897 2898 return nlmsg_total_size(min_ifinfo_dump_size); 2899 } 2900 2901 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2902 { 2903 int idx; 2904 int s_idx = cb->family; 2905 2906 if (s_idx == 0) 2907 s_idx = 1; 2908 2909 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2910 int type = cb->nlh->nlmsg_type-RTM_BASE; 2911 struct rtnl_link *handlers; 2912 rtnl_dumpit_func dumpit; 2913 2914 if (idx < s_idx || idx == PF_PACKET) 2915 continue; 2916 2917 handlers = rtnl_dereference(rtnl_msg_handlers[idx]); 2918 if (!handlers) 2919 continue; 2920 2921 dumpit = READ_ONCE(handlers[type].dumpit); 2922 if (!dumpit) 2923 continue; 2924 2925 if (idx > s_idx) { 2926 memset(&cb->args[0], 0, sizeof(cb->args)); 2927 cb->prev_seq = 0; 2928 cb->seq = 0; 2929 } 2930 if (dumpit(skb, cb)) 2931 break; 2932 } 2933 cb->family = idx; 2934 2935 return skb->len; 2936 } 2937 2938 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2939 unsigned int change, 2940 u32 event, gfp_t flags, int *new_nsid) 2941 { 2942 struct net *net = dev_net(dev); 2943 struct sk_buff *skb; 2944 int err = -ENOBUFS; 2945 size_t if_info_size; 2946 2947 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2948 if (skb == NULL) 2949 goto errout; 2950 2951 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0, event, 2952 new_nsid); 2953 if (err < 0) { 2954 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2955 WARN_ON(err == -EMSGSIZE); 2956 kfree_skb(skb); 2957 goto errout; 2958 } 2959 return skb; 2960 errout: 2961 if (err < 0) 2962 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2963 return NULL; 2964 } 2965 2966 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2967 { 2968 struct net *net = dev_net(dev); 2969 2970 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2971 } 2972 2973 static void rtmsg_ifinfo_event(int type, struct net_device *dev, 2974 unsigned int change, u32 event, 2975 gfp_t flags, int *new_nsid) 2976 { 2977 struct sk_buff *skb; 2978 2979 if (dev->reg_state != NETREG_REGISTERED) 2980 return; 2981 2982 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid); 2983 if (skb) 2984 rtmsg_ifinfo_send(skb, dev, flags); 2985 } 2986 2987 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2988 gfp_t flags) 2989 { 2990 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, NULL); 2991 } 2992 2993 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, 2994 gfp_t flags, int *new_nsid) 2995 { 2996 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 2997 new_nsid); 2998 } 2999 3000 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 3001 struct net_device *dev, 3002 u8 *addr, u16 vid, u32 pid, u32 seq, 3003 int type, unsigned int flags, 3004 int nlflags, u16 ndm_state) 3005 { 3006 struct nlmsghdr *nlh; 3007 struct ndmsg *ndm; 3008 3009 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 3010 if (!nlh) 3011 return -EMSGSIZE; 3012 3013 ndm = nlmsg_data(nlh); 3014 ndm->ndm_family = AF_BRIDGE; 3015 ndm->ndm_pad1 = 0; 3016 ndm->ndm_pad2 = 0; 3017 ndm->ndm_flags = flags; 3018 ndm->ndm_type = 0; 3019 ndm->ndm_ifindex = dev->ifindex; 3020 ndm->ndm_state = ndm_state; 3021 3022 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 3023 goto nla_put_failure; 3024 if (vid) 3025 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 3026 goto nla_put_failure; 3027 3028 nlmsg_end(skb, nlh); 3029 return 0; 3030 3031 nla_put_failure: 3032 nlmsg_cancel(skb, nlh); 3033 return -EMSGSIZE; 3034 } 3035 3036 static inline size_t rtnl_fdb_nlmsg_size(void) 3037 { 3038 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 3039 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 3040 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 3041 0; 3042 } 3043 3044 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 3045 u16 ndm_state) 3046 { 3047 struct net *net = dev_net(dev); 3048 struct sk_buff *skb; 3049 int err = -ENOBUFS; 3050 3051 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 3052 if (!skb) 3053 goto errout; 3054 3055 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 3056 0, 0, type, NTF_SELF, 0, ndm_state); 3057 if (err < 0) { 3058 kfree_skb(skb); 3059 goto errout; 3060 } 3061 3062 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 3063 return; 3064 errout: 3065 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 3066 } 3067 3068 /** 3069 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 3070 */ 3071 int ndo_dflt_fdb_add(struct ndmsg *ndm, 3072 struct nlattr *tb[], 3073 struct net_device *dev, 3074 const unsigned char *addr, u16 vid, 3075 u16 flags) 3076 { 3077 int err = -EINVAL; 3078 3079 /* If aging addresses are supported device will need to 3080 * implement its own handler for this. 3081 */ 3082 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 3083 pr_info("%s: FDB only supports static addresses\n", dev->name); 3084 return err; 3085 } 3086 3087 if (vid) { 3088 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 3089 return err; 3090 } 3091 3092 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3093 err = dev_uc_add_excl(dev, addr); 3094 else if (is_multicast_ether_addr(addr)) 3095 err = dev_mc_add_excl(dev, addr); 3096 3097 /* Only return duplicate errors if NLM_F_EXCL is set */ 3098 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 3099 err = 0; 3100 3101 return err; 3102 } 3103 EXPORT_SYMBOL(ndo_dflt_fdb_add); 3104 3105 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid, 3106 struct netlink_ext_ack *extack) 3107 { 3108 u16 vid = 0; 3109 3110 if (vlan_attr) { 3111 if (nla_len(vlan_attr) != sizeof(u16)) { 3112 NL_SET_ERR_MSG(extack, "invalid vlan attribute size"); 3113 return -EINVAL; 3114 } 3115 3116 vid = nla_get_u16(vlan_attr); 3117 3118 if (!vid || vid >= VLAN_VID_MASK) { 3119 NL_SET_ERR_MSG(extack, "invalid vlan id"); 3120 return -EINVAL; 3121 } 3122 } 3123 *p_vid = vid; 3124 return 0; 3125 } 3126 3127 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, 3128 struct netlink_ext_ack *extack) 3129 { 3130 struct net *net = sock_net(skb->sk); 3131 struct ndmsg *ndm; 3132 struct nlattr *tb[NDA_MAX+1]; 3133 struct net_device *dev; 3134 u8 *addr; 3135 u16 vid; 3136 int err; 3137 3138 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack); 3139 if (err < 0) 3140 return err; 3141 3142 ndm = nlmsg_data(nlh); 3143 if (ndm->ndm_ifindex == 0) { 3144 NL_SET_ERR_MSG(extack, "invalid ifindex"); 3145 return -EINVAL; 3146 } 3147 3148 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3149 if (dev == NULL) { 3150 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3151 return -ENODEV; 3152 } 3153 3154 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3155 NL_SET_ERR_MSG(extack, "invalid address"); 3156 return -EINVAL; 3157 } 3158 3159 addr = nla_data(tb[NDA_LLADDR]); 3160 3161 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 3162 if (err) 3163 return err; 3164 3165 err = -EOPNOTSUPP; 3166 3167 /* Support fdb on master device the net/bridge default case */ 3168 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3169 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3170 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3171 const struct net_device_ops *ops = br_dev->netdev_ops; 3172 3173 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 3174 nlh->nlmsg_flags); 3175 if (err) 3176 goto out; 3177 else 3178 ndm->ndm_flags &= ~NTF_MASTER; 3179 } 3180 3181 /* Embedded bridge, macvlan, and any other device support */ 3182 if ((ndm->ndm_flags & NTF_SELF)) { 3183 if (dev->netdev_ops->ndo_fdb_add) 3184 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 3185 vid, 3186 nlh->nlmsg_flags); 3187 else 3188 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 3189 nlh->nlmsg_flags); 3190 3191 if (!err) { 3192 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3193 ndm->ndm_state); 3194 ndm->ndm_flags &= ~NTF_SELF; 3195 } 3196 } 3197 out: 3198 return err; 3199 } 3200 3201 /** 3202 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3203 */ 3204 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3205 struct nlattr *tb[], 3206 struct net_device *dev, 3207 const unsigned char *addr, u16 vid) 3208 { 3209 int err = -EINVAL; 3210 3211 /* If aging addresses are supported device will need to 3212 * implement its own handler for this. 3213 */ 3214 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3215 pr_info("%s: FDB only supports static addresses\n", dev->name); 3216 return err; 3217 } 3218 3219 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3220 err = dev_uc_del(dev, addr); 3221 else if (is_multicast_ether_addr(addr)) 3222 err = dev_mc_del(dev, addr); 3223 3224 return err; 3225 } 3226 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3227 3228 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, 3229 struct netlink_ext_ack *extack) 3230 { 3231 struct net *net = sock_net(skb->sk); 3232 struct ndmsg *ndm; 3233 struct nlattr *tb[NDA_MAX+1]; 3234 struct net_device *dev; 3235 int err = -EINVAL; 3236 __u8 *addr; 3237 u16 vid; 3238 3239 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3240 return -EPERM; 3241 3242 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack); 3243 if (err < 0) 3244 return err; 3245 3246 ndm = nlmsg_data(nlh); 3247 if (ndm->ndm_ifindex == 0) { 3248 NL_SET_ERR_MSG(extack, "invalid ifindex"); 3249 return -EINVAL; 3250 } 3251 3252 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3253 if (dev == NULL) { 3254 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3255 return -ENODEV; 3256 } 3257 3258 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3259 NL_SET_ERR_MSG(extack, "invalid address"); 3260 return -EINVAL; 3261 } 3262 3263 addr = nla_data(tb[NDA_LLADDR]); 3264 3265 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 3266 if (err) 3267 return err; 3268 3269 err = -EOPNOTSUPP; 3270 3271 /* Support fdb on master device the net/bridge default case */ 3272 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3273 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3274 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3275 const struct net_device_ops *ops = br_dev->netdev_ops; 3276 3277 if (ops->ndo_fdb_del) 3278 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3279 3280 if (err) 3281 goto out; 3282 else 3283 ndm->ndm_flags &= ~NTF_MASTER; 3284 } 3285 3286 /* Embedded bridge, macvlan, and any other device support */ 3287 if (ndm->ndm_flags & NTF_SELF) { 3288 if (dev->netdev_ops->ndo_fdb_del) 3289 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3290 vid); 3291 else 3292 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3293 3294 if (!err) { 3295 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3296 ndm->ndm_state); 3297 ndm->ndm_flags &= ~NTF_SELF; 3298 } 3299 } 3300 out: 3301 return err; 3302 } 3303 3304 static int nlmsg_populate_fdb(struct sk_buff *skb, 3305 struct netlink_callback *cb, 3306 struct net_device *dev, 3307 int *idx, 3308 struct netdev_hw_addr_list *list) 3309 { 3310 struct netdev_hw_addr *ha; 3311 int err; 3312 u32 portid, seq; 3313 3314 portid = NETLINK_CB(cb->skb).portid; 3315 seq = cb->nlh->nlmsg_seq; 3316 3317 list_for_each_entry(ha, &list->list, list) { 3318 if (*idx < cb->args[2]) 3319 goto skip; 3320 3321 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3322 portid, seq, 3323 RTM_NEWNEIGH, NTF_SELF, 3324 NLM_F_MULTI, NUD_PERMANENT); 3325 if (err < 0) 3326 return err; 3327 skip: 3328 *idx += 1; 3329 } 3330 return 0; 3331 } 3332 3333 /** 3334 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3335 * @nlh: netlink message header 3336 * @dev: netdevice 3337 * 3338 * Default netdevice operation to dump the existing unicast address list. 3339 * Returns number of addresses from list put in skb. 3340 */ 3341 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3342 struct netlink_callback *cb, 3343 struct net_device *dev, 3344 struct net_device *filter_dev, 3345 int *idx) 3346 { 3347 int err; 3348 3349 netif_addr_lock_bh(dev); 3350 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3351 if (err) 3352 goto out; 3353 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3354 out: 3355 netif_addr_unlock_bh(dev); 3356 return err; 3357 } 3358 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3359 3360 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3361 { 3362 struct net_device *dev; 3363 struct nlattr *tb[IFLA_MAX+1]; 3364 struct net_device *br_dev = NULL; 3365 const struct net_device_ops *ops = NULL; 3366 const struct net_device_ops *cops = NULL; 3367 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3368 struct net *net = sock_net(skb->sk); 3369 struct hlist_head *head; 3370 int brport_idx = 0; 3371 int br_idx = 0; 3372 int h, s_h; 3373 int idx = 0, s_idx; 3374 int err = 0; 3375 int fidx = 0; 3376 3377 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, 3378 IFLA_MAX, ifla_policy, NULL); 3379 if (err < 0) { 3380 return -EINVAL; 3381 } else if (err == 0) { 3382 if (tb[IFLA_MASTER]) 3383 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3384 } 3385 3386 brport_idx = ifm->ifi_index; 3387 3388 if (br_idx) { 3389 br_dev = __dev_get_by_index(net, br_idx); 3390 if (!br_dev) 3391 return -ENODEV; 3392 3393 ops = br_dev->netdev_ops; 3394 } 3395 3396 s_h = cb->args[0]; 3397 s_idx = cb->args[1]; 3398 3399 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3400 idx = 0; 3401 head = &net->dev_index_head[h]; 3402 hlist_for_each_entry(dev, head, index_hlist) { 3403 3404 if (brport_idx && (dev->ifindex != brport_idx)) 3405 continue; 3406 3407 if (!br_idx) { /* user did not specify a specific bridge */ 3408 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3409 br_dev = netdev_master_upper_dev_get(dev); 3410 cops = br_dev->netdev_ops; 3411 } 3412 } else { 3413 if (dev != br_dev && 3414 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3415 continue; 3416 3417 if (br_dev != netdev_master_upper_dev_get(dev) && 3418 !(dev->priv_flags & IFF_EBRIDGE)) 3419 continue; 3420 cops = ops; 3421 } 3422 3423 if (idx < s_idx) 3424 goto cont; 3425 3426 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3427 if (cops && cops->ndo_fdb_dump) { 3428 err = cops->ndo_fdb_dump(skb, cb, 3429 br_dev, dev, 3430 &fidx); 3431 if (err == -EMSGSIZE) 3432 goto out; 3433 } 3434 } 3435 3436 if (dev->netdev_ops->ndo_fdb_dump) 3437 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3438 dev, NULL, 3439 &fidx); 3440 else 3441 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3442 &fidx); 3443 if (err == -EMSGSIZE) 3444 goto out; 3445 3446 cops = NULL; 3447 3448 /* reset fdb offset to 0 for rest of the interfaces */ 3449 cb->args[2] = 0; 3450 fidx = 0; 3451 cont: 3452 idx++; 3453 } 3454 } 3455 3456 out: 3457 cb->args[0] = h; 3458 cb->args[1] = idx; 3459 cb->args[2] = fidx; 3460 3461 return skb->len; 3462 } 3463 3464 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3465 unsigned int attrnum, unsigned int flag) 3466 { 3467 if (mask & flag) 3468 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3469 return 0; 3470 } 3471 3472 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3473 struct net_device *dev, u16 mode, 3474 u32 flags, u32 mask, int nlflags, 3475 u32 filter_mask, 3476 int (*vlan_fill)(struct sk_buff *skb, 3477 struct net_device *dev, 3478 u32 filter_mask)) 3479 { 3480 struct nlmsghdr *nlh; 3481 struct ifinfomsg *ifm; 3482 struct nlattr *br_afspec; 3483 struct nlattr *protinfo; 3484 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3485 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3486 int err = 0; 3487 3488 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3489 if (nlh == NULL) 3490 return -EMSGSIZE; 3491 3492 ifm = nlmsg_data(nlh); 3493 ifm->ifi_family = AF_BRIDGE; 3494 ifm->__ifi_pad = 0; 3495 ifm->ifi_type = dev->type; 3496 ifm->ifi_index = dev->ifindex; 3497 ifm->ifi_flags = dev_get_flags(dev); 3498 ifm->ifi_change = 0; 3499 3500 3501 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3502 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3503 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3504 (br_dev && 3505 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3506 (dev->addr_len && 3507 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3508 (dev->ifindex != dev_get_iflink(dev) && 3509 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3510 goto nla_put_failure; 3511 3512 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3513 if (!br_afspec) 3514 goto nla_put_failure; 3515 3516 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3517 nla_nest_cancel(skb, br_afspec); 3518 goto nla_put_failure; 3519 } 3520 3521 if (mode != BRIDGE_MODE_UNDEF) { 3522 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3523 nla_nest_cancel(skb, br_afspec); 3524 goto nla_put_failure; 3525 } 3526 } 3527 if (vlan_fill) { 3528 err = vlan_fill(skb, dev, filter_mask); 3529 if (err) { 3530 nla_nest_cancel(skb, br_afspec); 3531 goto nla_put_failure; 3532 } 3533 } 3534 nla_nest_end(skb, br_afspec); 3535 3536 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3537 if (!protinfo) 3538 goto nla_put_failure; 3539 3540 if (brport_nla_put_flag(skb, flags, mask, 3541 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3542 brport_nla_put_flag(skb, flags, mask, 3543 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3544 brport_nla_put_flag(skb, flags, mask, 3545 IFLA_BRPORT_FAST_LEAVE, 3546 BR_MULTICAST_FAST_LEAVE) || 3547 brport_nla_put_flag(skb, flags, mask, 3548 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3549 brport_nla_put_flag(skb, flags, mask, 3550 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3551 brport_nla_put_flag(skb, flags, mask, 3552 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3553 brport_nla_put_flag(skb, flags, mask, 3554 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3555 brport_nla_put_flag(skb, flags, mask, 3556 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3557 nla_nest_cancel(skb, protinfo); 3558 goto nla_put_failure; 3559 } 3560 3561 nla_nest_end(skb, protinfo); 3562 3563 nlmsg_end(skb, nlh); 3564 return 0; 3565 nla_put_failure: 3566 nlmsg_cancel(skb, nlh); 3567 return err ? err : -EMSGSIZE; 3568 } 3569 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3570 3571 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3572 { 3573 struct net *net = sock_net(skb->sk); 3574 struct net_device *dev; 3575 int idx = 0; 3576 u32 portid = NETLINK_CB(cb->skb).portid; 3577 u32 seq = cb->nlh->nlmsg_seq; 3578 u32 filter_mask = 0; 3579 int err; 3580 3581 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3582 struct nlattr *extfilt; 3583 3584 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3585 IFLA_EXT_MASK); 3586 if (extfilt) { 3587 if (nla_len(extfilt) < sizeof(filter_mask)) 3588 return -EINVAL; 3589 3590 filter_mask = nla_get_u32(extfilt); 3591 } 3592 } 3593 3594 rcu_read_lock(); 3595 for_each_netdev_rcu(net, dev) { 3596 const struct net_device_ops *ops = dev->netdev_ops; 3597 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3598 3599 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3600 if (idx >= cb->args[0]) { 3601 err = br_dev->netdev_ops->ndo_bridge_getlink( 3602 skb, portid, seq, dev, 3603 filter_mask, NLM_F_MULTI); 3604 if (err < 0 && err != -EOPNOTSUPP) { 3605 if (likely(skb->len)) 3606 break; 3607 3608 goto out_err; 3609 } 3610 } 3611 idx++; 3612 } 3613 3614 if (ops->ndo_bridge_getlink) { 3615 if (idx >= cb->args[0]) { 3616 err = ops->ndo_bridge_getlink(skb, portid, 3617 seq, dev, 3618 filter_mask, 3619 NLM_F_MULTI); 3620 if (err < 0 && err != -EOPNOTSUPP) { 3621 if (likely(skb->len)) 3622 break; 3623 3624 goto out_err; 3625 } 3626 } 3627 idx++; 3628 } 3629 } 3630 err = skb->len; 3631 out_err: 3632 rcu_read_unlock(); 3633 cb->args[0] = idx; 3634 3635 return err; 3636 } 3637 3638 static inline size_t bridge_nlmsg_size(void) 3639 { 3640 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3641 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3642 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3643 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3644 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3645 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3646 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3647 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3648 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3649 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3650 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3651 } 3652 3653 static int rtnl_bridge_notify(struct net_device *dev) 3654 { 3655 struct net *net = dev_net(dev); 3656 struct sk_buff *skb; 3657 int err = -EOPNOTSUPP; 3658 3659 if (!dev->netdev_ops->ndo_bridge_getlink) 3660 return 0; 3661 3662 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3663 if (!skb) { 3664 err = -ENOMEM; 3665 goto errout; 3666 } 3667 3668 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3669 if (err < 0) 3670 goto errout; 3671 3672 if (!skb->len) 3673 goto errout; 3674 3675 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3676 return 0; 3677 errout: 3678 WARN_ON(err == -EMSGSIZE); 3679 kfree_skb(skb); 3680 if (err) 3681 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3682 return err; 3683 } 3684 3685 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3686 struct netlink_ext_ack *extack) 3687 { 3688 struct net *net = sock_net(skb->sk); 3689 struct ifinfomsg *ifm; 3690 struct net_device *dev; 3691 struct nlattr *br_spec, *attr = NULL; 3692 int rem, err = -EOPNOTSUPP; 3693 u16 flags = 0; 3694 bool have_flags = false; 3695 3696 if (nlmsg_len(nlh) < sizeof(*ifm)) 3697 return -EINVAL; 3698 3699 ifm = nlmsg_data(nlh); 3700 if (ifm->ifi_family != AF_BRIDGE) 3701 return -EPFNOSUPPORT; 3702 3703 dev = __dev_get_by_index(net, ifm->ifi_index); 3704 if (!dev) { 3705 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3706 return -ENODEV; 3707 } 3708 3709 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3710 if (br_spec) { 3711 nla_for_each_nested(attr, br_spec, rem) { 3712 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3713 if (nla_len(attr) < sizeof(flags)) 3714 return -EINVAL; 3715 3716 have_flags = true; 3717 flags = nla_get_u16(attr); 3718 break; 3719 } 3720 } 3721 } 3722 3723 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3724 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3725 3726 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3727 err = -EOPNOTSUPP; 3728 goto out; 3729 } 3730 3731 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3732 if (err) 3733 goto out; 3734 3735 flags &= ~BRIDGE_FLAGS_MASTER; 3736 } 3737 3738 if ((flags & BRIDGE_FLAGS_SELF)) { 3739 if (!dev->netdev_ops->ndo_bridge_setlink) 3740 err = -EOPNOTSUPP; 3741 else 3742 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3743 flags); 3744 if (!err) { 3745 flags &= ~BRIDGE_FLAGS_SELF; 3746 3747 /* Generate event to notify upper layer of bridge 3748 * change 3749 */ 3750 err = rtnl_bridge_notify(dev); 3751 } 3752 } 3753 3754 if (have_flags) 3755 memcpy(nla_data(attr), &flags, sizeof(flags)); 3756 out: 3757 return err; 3758 } 3759 3760 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 3761 struct netlink_ext_ack *extack) 3762 { 3763 struct net *net = sock_net(skb->sk); 3764 struct ifinfomsg *ifm; 3765 struct net_device *dev; 3766 struct nlattr *br_spec, *attr = NULL; 3767 int rem, err = -EOPNOTSUPP; 3768 u16 flags = 0; 3769 bool have_flags = false; 3770 3771 if (nlmsg_len(nlh) < sizeof(*ifm)) 3772 return -EINVAL; 3773 3774 ifm = nlmsg_data(nlh); 3775 if (ifm->ifi_family != AF_BRIDGE) 3776 return -EPFNOSUPPORT; 3777 3778 dev = __dev_get_by_index(net, ifm->ifi_index); 3779 if (!dev) { 3780 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3781 return -ENODEV; 3782 } 3783 3784 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3785 if (br_spec) { 3786 nla_for_each_nested(attr, br_spec, rem) { 3787 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3788 if (nla_len(attr) < sizeof(flags)) 3789 return -EINVAL; 3790 3791 have_flags = true; 3792 flags = nla_get_u16(attr); 3793 break; 3794 } 3795 } 3796 } 3797 3798 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3799 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3800 3801 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3802 err = -EOPNOTSUPP; 3803 goto out; 3804 } 3805 3806 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3807 if (err) 3808 goto out; 3809 3810 flags &= ~BRIDGE_FLAGS_MASTER; 3811 } 3812 3813 if ((flags & BRIDGE_FLAGS_SELF)) { 3814 if (!dev->netdev_ops->ndo_bridge_dellink) 3815 err = -EOPNOTSUPP; 3816 else 3817 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3818 flags); 3819 3820 if (!err) { 3821 flags &= ~BRIDGE_FLAGS_SELF; 3822 3823 /* Generate event to notify upper layer of bridge 3824 * change 3825 */ 3826 err = rtnl_bridge_notify(dev); 3827 } 3828 } 3829 3830 if (have_flags) 3831 memcpy(nla_data(attr), &flags, sizeof(flags)); 3832 out: 3833 return err; 3834 } 3835 3836 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3837 { 3838 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3839 (!idxattr || idxattr == attrid); 3840 } 3841 3842 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3843 static int rtnl_get_offload_stats_attr_size(int attr_id) 3844 { 3845 switch (attr_id) { 3846 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3847 return sizeof(struct rtnl_link_stats64); 3848 } 3849 3850 return 0; 3851 } 3852 3853 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3854 int *prividx) 3855 { 3856 struct nlattr *attr = NULL; 3857 int attr_id, size; 3858 void *attr_data; 3859 int err; 3860 3861 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3862 dev->netdev_ops->ndo_get_offload_stats)) 3863 return -ENODATA; 3864 3865 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3866 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3867 if (attr_id < *prividx) 3868 continue; 3869 3870 size = rtnl_get_offload_stats_attr_size(attr_id); 3871 if (!size) 3872 continue; 3873 3874 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3875 continue; 3876 3877 attr = nla_reserve_64bit(skb, attr_id, size, 3878 IFLA_OFFLOAD_XSTATS_UNSPEC); 3879 if (!attr) 3880 goto nla_put_failure; 3881 3882 attr_data = nla_data(attr); 3883 memset(attr_data, 0, size); 3884 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3885 attr_data); 3886 if (err) 3887 goto get_offload_stats_failure; 3888 } 3889 3890 if (!attr) 3891 return -ENODATA; 3892 3893 *prividx = 0; 3894 return 0; 3895 3896 nla_put_failure: 3897 err = -EMSGSIZE; 3898 get_offload_stats_failure: 3899 *prividx = attr_id; 3900 return err; 3901 } 3902 3903 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3904 { 3905 int nla_size = 0; 3906 int attr_id; 3907 int size; 3908 3909 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3910 dev->netdev_ops->ndo_get_offload_stats)) 3911 return 0; 3912 3913 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3914 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3915 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3916 continue; 3917 size = rtnl_get_offload_stats_attr_size(attr_id); 3918 nla_size += nla_total_size_64bit(size); 3919 } 3920 3921 if (nla_size != 0) 3922 nla_size += nla_total_size(0); 3923 3924 return nla_size; 3925 } 3926 3927 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3928 int type, u32 pid, u32 seq, u32 change, 3929 unsigned int flags, unsigned int filter_mask, 3930 int *idxattr, int *prividx) 3931 { 3932 struct if_stats_msg *ifsm; 3933 struct nlmsghdr *nlh; 3934 struct nlattr *attr; 3935 int s_prividx = *prividx; 3936 int err; 3937 3938 ASSERT_RTNL(); 3939 3940 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3941 if (!nlh) 3942 return -EMSGSIZE; 3943 3944 ifsm = nlmsg_data(nlh); 3945 ifsm->family = PF_UNSPEC; 3946 ifsm->pad1 = 0; 3947 ifsm->pad2 = 0; 3948 ifsm->ifindex = dev->ifindex; 3949 ifsm->filter_mask = filter_mask; 3950 3951 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3952 struct rtnl_link_stats64 *sp; 3953 3954 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3955 sizeof(struct rtnl_link_stats64), 3956 IFLA_STATS_UNSPEC); 3957 if (!attr) 3958 goto nla_put_failure; 3959 3960 sp = nla_data(attr); 3961 dev_get_stats(dev, sp); 3962 } 3963 3964 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3965 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3966 3967 if (ops && ops->fill_linkxstats) { 3968 *idxattr = IFLA_STATS_LINK_XSTATS; 3969 attr = nla_nest_start(skb, 3970 IFLA_STATS_LINK_XSTATS); 3971 if (!attr) 3972 goto nla_put_failure; 3973 3974 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3975 nla_nest_end(skb, attr); 3976 if (err) 3977 goto nla_put_failure; 3978 *idxattr = 0; 3979 } 3980 } 3981 3982 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3983 *idxattr)) { 3984 const struct rtnl_link_ops *ops = NULL; 3985 const struct net_device *master; 3986 3987 master = netdev_master_upper_dev_get(dev); 3988 if (master) 3989 ops = master->rtnl_link_ops; 3990 if (ops && ops->fill_linkxstats) { 3991 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3992 attr = nla_nest_start(skb, 3993 IFLA_STATS_LINK_XSTATS_SLAVE); 3994 if (!attr) 3995 goto nla_put_failure; 3996 3997 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3998 nla_nest_end(skb, attr); 3999 if (err) 4000 goto nla_put_failure; 4001 *idxattr = 0; 4002 } 4003 } 4004 4005 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 4006 *idxattr)) { 4007 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 4008 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 4009 if (!attr) 4010 goto nla_put_failure; 4011 4012 err = rtnl_get_offload_stats(skb, dev, prividx); 4013 if (err == -ENODATA) 4014 nla_nest_cancel(skb, attr); 4015 else 4016 nla_nest_end(skb, attr); 4017 4018 if (err && err != -ENODATA) 4019 goto nla_put_failure; 4020 *idxattr = 0; 4021 } 4022 4023 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 4024 struct rtnl_af_ops *af_ops; 4025 4026 *idxattr = IFLA_STATS_AF_SPEC; 4027 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC); 4028 if (!attr) 4029 goto nla_put_failure; 4030 4031 rcu_read_lock(); 4032 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 4033 if (af_ops->fill_stats_af) { 4034 struct nlattr *af; 4035 int err; 4036 4037 af = nla_nest_start(skb, af_ops->family); 4038 if (!af) { 4039 rcu_read_unlock(); 4040 goto nla_put_failure; 4041 } 4042 err = af_ops->fill_stats_af(skb, dev); 4043 4044 if (err == -ENODATA) { 4045 nla_nest_cancel(skb, af); 4046 } else if (err < 0) { 4047 rcu_read_unlock(); 4048 goto nla_put_failure; 4049 } 4050 4051 nla_nest_end(skb, af); 4052 } 4053 } 4054 rcu_read_unlock(); 4055 4056 nla_nest_end(skb, attr); 4057 4058 *idxattr = 0; 4059 } 4060 4061 nlmsg_end(skb, nlh); 4062 4063 return 0; 4064 4065 nla_put_failure: 4066 /* not a multi message or no progress mean a real error */ 4067 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 4068 nlmsg_cancel(skb, nlh); 4069 else 4070 nlmsg_end(skb, nlh); 4071 4072 return -EMSGSIZE; 4073 } 4074 4075 static size_t if_nlmsg_stats_size(const struct net_device *dev, 4076 u32 filter_mask) 4077 { 4078 size_t size = 0; 4079 4080 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 4081 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 4082 4083 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 4084 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 4085 int attr = IFLA_STATS_LINK_XSTATS; 4086 4087 if (ops && ops->get_linkxstats_size) { 4088 size += nla_total_size(ops->get_linkxstats_size(dev, 4089 attr)); 4090 /* for IFLA_STATS_LINK_XSTATS */ 4091 size += nla_total_size(0); 4092 } 4093 } 4094 4095 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 4096 struct net_device *_dev = (struct net_device *)dev; 4097 const struct rtnl_link_ops *ops = NULL; 4098 const struct net_device *master; 4099 4100 /* netdev_master_upper_dev_get can't take const */ 4101 master = netdev_master_upper_dev_get(_dev); 4102 if (master) 4103 ops = master->rtnl_link_ops; 4104 if (ops && ops->get_linkxstats_size) { 4105 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 4106 4107 size += nla_total_size(ops->get_linkxstats_size(dev, 4108 attr)); 4109 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 4110 size += nla_total_size(0); 4111 } 4112 } 4113 4114 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 4115 size += rtnl_get_offload_stats_size(dev); 4116 4117 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 4118 struct rtnl_af_ops *af_ops; 4119 4120 /* for IFLA_STATS_AF_SPEC */ 4121 size += nla_total_size(0); 4122 4123 rcu_read_lock(); 4124 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 4125 if (af_ops->get_stats_af_size) { 4126 size += nla_total_size( 4127 af_ops->get_stats_af_size(dev)); 4128 4129 /* for AF_* */ 4130 size += nla_total_size(0); 4131 } 4132 } 4133 rcu_read_unlock(); 4134 } 4135 4136 return size; 4137 } 4138 4139 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, 4140 struct netlink_ext_ack *extack) 4141 { 4142 struct net *net = sock_net(skb->sk); 4143 struct net_device *dev = NULL; 4144 int idxattr = 0, prividx = 0; 4145 struct if_stats_msg *ifsm; 4146 struct sk_buff *nskb; 4147 u32 filter_mask; 4148 int err; 4149 4150 if (nlmsg_len(nlh) < sizeof(*ifsm)) 4151 return -EINVAL; 4152 4153 ifsm = nlmsg_data(nlh); 4154 if (ifsm->ifindex > 0) 4155 dev = __dev_get_by_index(net, ifsm->ifindex); 4156 else 4157 return -EINVAL; 4158 4159 if (!dev) 4160 return -ENODEV; 4161 4162 filter_mask = ifsm->filter_mask; 4163 if (!filter_mask) 4164 return -EINVAL; 4165 4166 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 4167 if (!nskb) 4168 return -ENOBUFS; 4169 4170 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 4171 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 4172 0, filter_mask, &idxattr, &prividx); 4173 if (err < 0) { 4174 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 4175 WARN_ON(err == -EMSGSIZE); 4176 kfree_skb(nskb); 4177 } else { 4178 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 4179 } 4180 4181 return err; 4182 } 4183 4184 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 4185 { 4186 int h, s_h, err, s_idx, s_idxattr, s_prividx; 4187 struct net *net = sock_net(skb->sk); 4188 unsigned int flags = NLM_F_MULTI; 4189 struct if_stats_msg *ifsm; 4190 struct hlist_head *head; 4191 struct net_device *dev; 4192 u32 filter_mask = 0; 4193 int idx = 0; 4194 4195 s_h = cb->args[0]; 4196 s_idx = cb->args[1]; 4197 s_idxattr = cb->args[2]; 4198 s_prividx = cb->args[3]; 4199 4200 cb->seq = net->dev_base_seq; 4201 4202 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) 4203 return -EINVAL; 4204 4205 ifsm = nlmsg_data(cb->nlh); 4206 filter_mask = ifsm->filter_mask; 4207 if (!filter_mask) 4208 return -EINVAL; 4209 4210 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4211 idx = 0; 4212 head = &net->dev_index_head[h]; 4213 hlist_for_each_entry(dev, head, index_hlist) { 4214 if (idx < s_idx) 4215 goto cont; 4216 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 4217 NETLINK_CB(cb->skb).portid, 4218 cb->nlh->nlmsg_seq, 0, 4219 flags, filter_mask, 4220 &s_idxattr, &s_prividx); 4221 /* If we ran out of room on the first message, 4222 * we're in trouble 4223 */ 4224 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 4225 4226 if (err < 0) 4227 goto out; 4228 s_prividx = 0; 4229 s_idxattr = 0; 4230 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 4231 cont: 4232 idx++; 4233 } 4234 } 4235 out: 4236 cb->args[3] = s_prividx; 4237 cb->args[2] = s_idxattr; 4238 cb->args[1] = idx; 4239 cb->args[0] = h; 4240 4241 return skb->len; 4242 } 4243 4244 /* Process one rtnetlink message. */ 4245 4246 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 4247 struct netlink_ext_ack *extack) 4248 { 4249 struct net *net = sock_net(skb->sk); 4250 struct rtnl_link *handlers; 4251 int err = -EOPNOTSUPP; 4252 rtnl_doit_func doit; 4253 unsigned int flags; 4254 int kind; 4255 int family; 4256 int type; 4257 4258 type = nlh->nlmsg_type; 4259 if (type > RTM_MAX) 4260 return -EOPNOTSUPP; 4261 4262 type -= RTM_BASE; 4263 4264 /* All the messages must have at least 1 byte length */ 4265 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 4266 return 0; 4267 4268 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 4269 kind = type&3; 4270 4271 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 4272 return -EPERM; 4273 4274 if (family >= ARRAY_SIZE(rtnl_msg_handlers)) 4275 family = PF_UNSPEC; 4276 4277 rcu_read_lock(); 4278 handlers = rcu_dereference(rtnl_msg_handlers[family]); 4279 if (!handlers) { 4280 family = PF_UNSPEC; 4281 handlers = rcu_dereference(rtnl_msg_handlers[family]); 4282 } 4283 4284 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 4285 struct sock *rtnl; 4286 rtnl_dumpit_func dumpit; 4287 u16 min_dump_alloc = 0; 4288 4289 dumpit = READ_ONCE(handlers[type].dumpit); 4290 if (!dumpit) { 4291 family = PF_UNSPEC; 4292 handlers = rcu_dereference(rtnl_msg_handlers[PF_UNSPEC]); 4293 if (!handlers) 4294 goto err_unlock; 4295 4296 dumpit = READ_ONCE(handlers[type].dumpit); 4297 if (!dumpit) 4298 goto err_unlock; 4299 } 4300 4301 refcount_inc(&rtnl_msg_handlers_ref[family]); 4302 4303 if (type == RTM_GETLINK - RTM_BASE) 4304 min_dump_alloc = rtnl_calcit(skb, nlh); 4305 4306 rcu_read_unlock(); 4307 4308 rtnl = net->rtnl; 4309 { 4310 struct netlink_dump_control c = { 4311 .dump = dumpit, 4312 .min_dump_alloc = min_dump_alloc, 4313 }; 4314 err = netlink_dump_start(rtnl, skb, nlh, &c); 4315 } 4316 refcount_dec(&rtnl_msg_handlers_ref[family]); 4317 return err; 4318 } 4319 4320 doit = READ_ONCE(handlers[type].doit); 4321 if (!doit) { 4322 family = PF_UNSPEC; 4323 handlers = rcu_dereference(rtnl_msg_handlers[family]); 4324 } 4325 4326 flags = READ_ONCE(handlers[type].flags); 4327 if (flags & RTNL_FLAG_DOIT_UNLOCKED) { 4328 refcount_inc(&rtnl_msg_handlers_ref[family]); 4329 doit = READ_ONCE(handlers[type].doit); 4330 rcu_read_unlock(); 4331 if (doit) 4332 err = doit(skb, nlh, extack); 4333 refcount_dec(&rtnl_msg_handlers_ref[family]); 4334 return err; 4335 } 4336 4337 rcu_read_unlock(); 4338 4339 rtnl_lock(); 4340 handlers = rtnl_dereference(rtnl_msg_handlers[family]); 4341 if (handlers) { 4342 doit = READ_ONCE(handlers[type].doit); 4343 if (doit) 4344 err = doit(skb, nlh, extack); 4345 } 4346 rtnl_unlock(); 4347 return err; 4348 4349 err_unlock: 4350 rcu_read_unlock(); 4351 return -EOPNOTSUPP; 4352 } 4353 4354 static void rtnetlink_rcv(struct sk_buff *skb) 4355 { 4356 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4357 } 4358 4359 static int rtnetlink_bind(struct net *net, int group) 4360 { 4361 switch (group) { 4362 case RTNLGRP_IPV4_MROUTE_R: 4363 case RTNLGRP_IPV6_MROUTE_R: 4364 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 4365 return -EPERM; 4366 break; 4367 } 4368 return 0; 4369 } 4370 4371 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4372 { 4373 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4374 4375 switch (event) { 4376 case NETDEV_REBOOT: 4377 case NETDEV_CHANGEMTU: 4378 case NETDEV_CHANGEADDR: 4379 case NETDEV_CHANGENAME: 4380 case NETDEV_FEAT_CHANGE: 4381 case NETDEV_BONDING_FAILOVER: 4382 case NETDEV_POST_TYPE_CHANGE: 4383 case NETDEV_NOTIFY_PEERS: 4384 case NETDEV_CHANGEUPPER: 4385 case NETDEV_RESEND_IGMP: 4386 case NETDEV_CHANGEINFODATA: 4387 case NETDEV_CHANGELOWERSTATE: 4388 case NETDEV_CHANGE_TX_QUEUE_LEN: 4389 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), 4390 GFP_KERNEL, NULL); 4391 break; 4392 default: 4393 break; 4394 } 4395 return NOTIFY_DONE; 4396 } 4397 4398 static struct notifier_block rtnetlink_dev_notifier = { 4399 .notifier_call = rtnetlink_event, 4400 }; 4401 4402 4403 static int __net_init rtnetlink_net_init(struct net *net) 4404 { 4405 struct sock *sk; 4406 struct netlink_kernel_cfg cfg = { 4407 .groups = RTNLGRP_MAX, 4408 .input = rtnetlink_rcv, 4409 .cb_mutex = &rtnl_mutex, 4410 .flags = NL_CFG_F_NONROOT_RECV, 4411 .bind = rtnetlink_bind, 4412 }; 4413 4414 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4415 if (!sk) 4416 return -ENOMEM; 4417 net->rtnl = sk; 4418 return 0; 4419 } 4420 4421 static void __net_exit rtnetlink_net_exit(struct net *net) 4422 { 4423 netlink_kernel_release(net->rtnl); 4424 net->rtnl = NULL; 4425 } 4426 4427 static struct pernet_operations rtnetlink_net_ops = { 4428 .init = rtnetlink_net_init, 4429 .exit = rtnetlink_net_exit, 4430 }; 4431 4432 void __init rtnetlink_init(void) 4433 { 4434 int i; 4435 4436 for (i = 0; i < ARRAY_SIZE(rtnl_msg_handlers_ref); i++) 4437 refcount_set(&rtnl_msg_handlers_ref[i], 1); 4438 4439 if (register_pernet_subsys(&rtnetlink_net_ops)) 4440 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4441 4442 register_netdevice_notifier(&rtnetlink_dev_notifier); 4443 4444 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4445 rtnl_dump_ifinfo, 0); 4446 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0); 4447 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0); 4448 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0); 4449 4450 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0); 4451 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); 4452 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); 4453 4454 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); 4455 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0); 4456 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, 0); 4457 4458 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0); 4459 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0); 4460 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0); 4461 4462 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4463 0); 4464 } 4465