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] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1555 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1556 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1557 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1558 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1559 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1560 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1561 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1562 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1563 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1564 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1565 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1566 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1567 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1568 [IFLA_XDP] = { .type = NLA_NESTED }, 1569 [IFLA_EVENT] = { .type = NLA_U32 }, 1570 [IFLA_GROUP] = { .type = NLA_U32 }, 1571 }; 1572 1573 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1574 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1575 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1576 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1577 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1578 }; 1579 1580 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1581 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1582 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1583 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1584 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1585 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1586 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1587 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1588 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1589 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1590 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1591 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1592 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1593 }; 1594 1595 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1596 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1597 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1598 .len = PORT_PROFILE_MAX }, 1599 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1600 .len = PORT_UUID_MAX }, 1601 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1602 .len = PORT_UUID_MAX }, 1603 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1604 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1605 1606 /* Unused, but we need to keep it here since user space could 1607 * fill it. It's also broken with regard to NLA_BINARY use in 1608 * combination with structs. 1609 */ 1610 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1611 .len = sizeof(struct ifla_port_vsi) }, 1612 }; 1613 1614 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1615 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1616 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1617 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1618 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 }, 1619 }; 1620 1621 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1622 { 1623 const struct rtnl_link_ops *ops = NULL; 1624 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1625 1626 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, 1627 ifla_info_policy, NULL) < 0) 1628 return NULL; 1629 1630 if (linfo[IFLA_INFO_KIND]) { 1631 char kind[MODULE_NAME_LEN]; 1632 1633 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1634 ops = rtnl_link_ops_get(kind); 1635 } 1636 1637 return ops; 1638 } 1639 1640 static bool link_master_filtered(struct net_device *dev, int master_idx) 1641 { 1642 struct net_device *master; 1643 1644 if (!master_idx) 1645 return false; 1646 1647 master = netdev_master_upper_dev_get(dev); 1648 if (!master || master->ifindex != master_idx) 1649 return true; 1650 1651 return false; 1652 } 1653 1654 static bool link_kind_filtered(const struct net_device *dev, 1655 const struct rtnl_link_ops *kind_ops) 1656 { 1657 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1658 return true; 1659 1660 return false; 1661 } 1662 1663 static bool link_dump_filtered(struct net_device *dev, 1664 int master_idx, 1665 const struct rtnl_link_ops *kind_ops) 1666 { 1667 if (link_master_filtered(dev, master_idx) || 1668 link_kind_filtered(dev, kind_ops)) 1669 return true; 1670 1671 return false; 1672 } 1673 1674 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1675 { 1676 struct net *net = sock_net(skb->sk); 1677 int h, s_h; 1678 int idx = 0, s_idx; 1679 struct net_device *dev; 1680 struct hlist_head *head; 1681 struct nlattr *tb[IFLA_MAX+1]; 1682 u32 ext_filter_mask = 0; 1683 const struct rtnl_link_ops *kind_ops = NULL; 1684 unsigned int flags = NLM_F_MULTI; 1685 int master_idx = 0; 1686 int err; 1687 int hdrlen; 1688 1689 s_h = cb->args[0]; 1690 s_idx = cb->args[1]; 1691 1692 /* A hack to preserve kernel<->userspace interface. 1693 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1694 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1695 * what iproute2 < v3.9.0 used. 1696 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1697 * attribute, its netlink message is shorter than struct ifinfomsg. 1698 */ 1699 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1700 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1701 1702 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, 1703 ifla_policy, NULL) >= 0) { 1704 if (tb[IFLA_EXT_MASK]) 1705 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1706 1707 if (tb[IFLA_MASTER]) 1708 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1709 1710 if (tb[IFLA_LINKINFO]) 1711 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1712 1713 if (master_idx || kind_ops) 1714 flags |= NLM_F_DUMP_FILTERED; 1715 } 1716 1717 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1718 idx = 0; 1719 head = &net->dev_index_head[h]; 1720 hlist_for_each_entry(dev, head, index_hlist) { 1721 if (link_dump_filtered(dev, master_idx, kind_ops)) 1722 goto cont; 1723 if (idx < s_idx) 1724 goto cont; 1725 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1726 NETLINK_CB(cb->skb).portid, 1727 cb->nlh->nlmsg_seq, 0, 1728 flags, 1729 ext_filter_mask, 0, NULL); 1730 1731 if (err < 0) { 1732 if (likely(skb->len)) 1733 goto out; 1734 1735 goto out_err; 1736 } 1737 cont: 1738 idx++; 1739 } 1740 } 1741 out: 1742 err = skb->len; 1743 out_err: 1744 cb->args[1] = idx; 1745 cb->args[0] = h; 1746 cb->seq = net->dev_base_seq; 1747 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1748 1749 return err; 1750 } 1751 1752 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 1753 struct netlink_ext_ack *exterr) 1754 { 1755 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr); 1756 } 1757 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1758 1759 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1760 { 1761 struct net *net; 1762 /* Examine the link attributes and figure out which 1763 * network namespace we are talking about. 1764 */ 1765 if (tb[IFLA_NET_NS_PID]) 1766 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1767 else if (tb[IFLA_NET_NS_FD]) 1768 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1769 else 1770 net = get_net(src_net); 1771 return net; 1772 } 1773 EXPORT_SYMBOL(rtnl_link_get_net); 1774 1775 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1776 { 1777 if (dev) { 1778 if (tb[IFLA_ADDRESS] && 1779 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1780 return -EINVAL; 1781 1782 if (tb[IFLA_BROADCAST] && 1783 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1784 return -EINVAL; 1785 } 1786 1787 if (tb[IFLA_AF_SPEC]) { 1788 struct nlattr *af; 1789 int rem, err; 1790 1791 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1792 const struct rtnl_af_ops *af_ops; 1793 1794 rcu_read_lock(); 1795 af_ops = rtnl_af_lookup(nla_type(af)); 1796 if (!af_ops) { 1797 rcu_read_unlock(); 1798 return -EAFNOSUPPORT; 1799 } 1800 1801 if (!af_ops->set_link_af) { 1802 rcu_read_unlock(); 1803 return -EOPNOTSUPP; 1804 } 1805 1806 if (af_ops->validate_link_af) { 1807 err = af_ops->validate_link_af(dev, af); 1808 if (err < 0) { 1809 rcu_read_unlock(); 1810 return err; 1811 } 1812 } 1813 1814 rcu_read_unlock(); 1815 } 1816 } 1817 1818 return 0; 1819 } 1820 1821 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1822 int guid_type) 1823 { 1824 const struct net_device_ops *ops = dev->netdev_ops; 1825 1826 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1827 } 1828 1829 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1830 { 1831 if (dev->type != ARPHRD_INFINIBAND) 1832 return -EOPNOTSUPP; 1833 1834 return handle_infiniband_guid(dev, ivt, guid_type); 1835 } 1836 1837 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1838 { 1839 const struct net_device_ops *ops = dev->netdev_ops; 1840 int err = -EINVAL; 1841 1842 if (tb[IFLA_VF_MAC]) { 1843 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1844 1845 err = -EOPNOTSUPP; 1846 if (ops->ndo_set_vf_mac) 1847 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1848 ivm->mac); 1849 if (err < 0) 1850 return err; 1851 } 1852 1853 if (tb[IFLA_VF_VLAN]) { 1854 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1855 1856 err = -EOPNOTSUPP; 1857 if (ops->ndo_set_vf_vlan) 1858 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1859 ivv->qos, 1860 htons(ETH_P_8021Q)); 1861 if (err < 0) 1862 return err; 1863 } 1864 1865 if (tb[IFLA_VF_VLAN_LIST]) { 1866 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 1867 struct nlattr *attr; 1868 int rem, len = 0; 1869 1870 err = -EOPNOTSUPP; 1871 if (!ops->ndo_set_vf_vlan) 1872 return err; 1873 1874 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 1875 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 1876 nla_len(attr) < NLA_HDRLEN) { 1877 return -EINVAL; 1878 } 1879 if (len >= MAX_VLAN_LIST_LEN) 1880 return -EOPNOTSUPP; 1881 ivvl[len] = nla_data(attr); 1882 1883 len++; 1884 } 1885 if (len == 0) 1886 return -EINVAL; 1887 1888 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 1889 ivvl[0]->qos, ivvl[0]->vlan_proto); 1890 if (err < 0) 1891 return err; 1892 } 1893 1894 if (tb[IFLA_VF_TX_RATE]) { 1895 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1896 struct ifla_vf_info ivf; 1897 1898 err = -EOPNOTSUPP; 1899 if (ops->ndo_get_vf_config) 1900 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1901 if (err < 0) 1902 return err; 1903 1904 err = -EOPNOTSUPP; 1905 if (ops->ndo_set_vf_rate) 1906 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1907 ivf.min_tx_rate, 1908 ivt->rate); 1909 if (err < 0) 1910 return err; 1911 } 1912 1913 if (tb[IFLA_VF_RATE]) { 1914 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1915 1916 err = -EOPNOTSUPP; 1917 if (ops->ndo_set_vf_rate) 1918 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1919 ivt->min_tx_rate, 1920 ivt->max_tx_rate); 1921 if (err < 0) 1922 return err; 1923 } 1924 1925 if (tb[IFLA_VF_SPOOFCHK]) { 1926 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1927 1928 err = -EOPNOTSUPP; 1929 if (ops->ndo_set_vf_spoofchk) 1930 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1931 ivs->setting); 1932 if (err < 0) 1933 return err; 1934 } 1935 1936 if (tb[IFLA_VF_LINK_STATE]) { 1937 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1938 1939 err = -EOPNOTSUPP; 1940 if (ops->ndo_set_vf_link_state) 1941 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1942 ivl->link_state); 1943 if (err < 0) 1944 return err; 1945 } 1946 1947 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1948 struct ifla_vf_rss_query_en *ivrssq_en; 1949 1950 err = -EOPNOTSUPP; 1951 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1952 if (ops->ndo_set_vf_rss_query_en) 1953 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1954 ivrssq_en->setting); 1955 if (err < 0) 1956 return err; 1957 } 1958 1959 if (tb[IFLA_VF_TRUST]) { 1960 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1961 1962 err = -EOPNOTSUPP; 1963 if (ops->ndo_set_vf_trust) 1964 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1965 if (err < 0) 1966 return err; 1967 } 1968 1969 if (tb[IFLA_VF_IB_NODE_GUID]) { 1970 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1971 1972 if (!ops->ndo_set_vf_guid) 1973 return -EOPNOTSUPP; 1974 1975 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1976 } 1977 1978 if (tb[IFLA_VF_IB_PORT_GUID]) { 1979 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1980 1981 if (!ops->ndo_set_vf_guid) 1982 return -EOPNOTSUPP; 1983 1984 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1985 } 1986 1987 return err; 1988 } 1989 1990 static int do_set_master(struct net_device *dev, int ifindex, 1991 struct netlink_ext_ack *extack) 1992 { 1993 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1994 const struct net_device_ops *ops; 1995 int err; 1996 1997 if (upper_dev) { 1998 if (upper_dev->ifindex == ifindex) 1999 return 0; 2000 ops = upper_dev->netdev_ops; 2001 if (ops->ndo_del_slave) { 2002 err = ops->ndo_del_slave(upper_dev, dev); 2003 if (err) 2004 return err; 2005 } else { 2006 return -EOPNOTSUPP; 2007 } 2008 } 2009 2010 if (ifindex) { 2011 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 2012 if (!upper_dev) 2013 return -EINVAL; 2014 ops = upper_dev->netdev_ops; 2015 if (ops->ndo_add_slave) { 2016 err = ops->ndo_add_slave(upper_dev, dev, extack); 2017 if (err) 2018 return err; 2019 } else { 2020 return -EOPNOTSUPP; 2021 } 2022 } 2023 return 0; 2024 } 2025 2026 #define DO_SETLINK_MODIFIED 0x01 2027 /* notify flag means notify + modified. */ 2028 #define DO_SETLINK_NOTIFY 0x03 2029 static int do_setlink(const struct sk_buff *skb, 2030 struct net_device *dev, struct ifinfomsg *ifm, 2031 struct netlink_ext_ack *extack, 2032 struct nlattr **tb, char *ifname, int status) 2033 { 2034 const struct net_device_ops *ops = dev->netdev_ops; 2035 int err; 2036 2037 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 2038 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 2039 if (IS_ERR(net)) { 2040 err = PTR_ERR(net); 2041 goto errout; 2042 } 2043 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 2044 put_net(net); 2045 err = -EPERM; 2046 goto errout; 2047 } 2048 err = dev_change_net_namespace(dev, net, ifname); 2049 put_net(net); 2050 if (err) 2051 goto errout; 2052 status |= DO_SETLINK_MODIFIED; 2053 } 2054 2055 if (tb[IFLA_MAP]) { 2056 struct rtnl_link_ifmap *u_map; 2057 struct ifmap k_map; 2058 2059 if (!ops->ndo_set_config) { 2060 err = -EOPNOTSUPP; 2061 goto errout; 2062 } 2063 2064 if (!netif_device_present(dev)) { 2065 err = -ENODEV; 2066 goto errout; 2067 } 2068 2069 u_map = nla_data(tb[IFLA_MAP]); 2070 k_map.mem_start = (unsigned long) u_map->mem_start; 2071 k_map.mem_end = (unsigned long) u_map->mem_end; 2072 k_map.base_addr = (unsigned short) u_map->base_addr; 2073 k_map.irq = (unsigned char) u_map->irq; 2074 k_map.dma = (unsigned char) u_map->dma; 2075 k_map.port = (unsigned char) u_map->port; 2076 2077 err = ops->ndo_set_config(dev, &k_map); 2078 if (err < 0) 2079 goto errout; 2080 2081 status |= DO_SETLINK_NOTIFY; 2082 } 2083 2084 if (tb[IFLA_ADDRESS]) { 2085 struct sockaddr *sa; 2086 int len; 2087 2088 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len, 2089 sizeof(*sa)); 2090 sa = kmalloc(len, GFP_KERNEL); 2091 if (!sa) { 2092 err = -ENOMEM; 2093 goto errout; 2094 } 2095 sa->sa_family = dev->type; 2096 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 2097 dev->addr_len); 2098 err = dev_set_mac_address(dev, sa); 2099 kfree(sa); 2100 if (err) 2101 goto errout; 2102 status |= DO_SETLINK_MODIFIED; 2103 } 2104 2105 if (tb[IFLA_MTU]) { 2106 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 2107 if (err < 0) 2108 goto errout; 2109 status |= DO_SETLINK_MODIFIED; 2110 } 2111 2112 if (tb[IFLA_GROUP]) { 2113 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2114 status |= DO_SETLINK_NOTIFY; 2115 } 2116 2117 /* 2118 * Interface selected by interface index but interface 2119 * name provided implies that a name change has been 2120 * requested. 2121 */ 2122 if (ifm->ifi_index > 0 && ifname[0]) { 2123 err = dev_change_name(dev, ifname); 2124 if (err < 0) 2125 goto errout; 2126 status |= DO_SETLINK_MODIFIED; 2127 } 2128 2129 if (tb[IFLA_IFALIAS]) { 2130 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2131 nla_len(tb[IFLA_IFALIAS])); 2132 if (err < 0) 2133 goto errout; 2134 status |= DO_SETLINK_NOTIFY; 2135 } 2136 2137 if (tb[IFLA_BROADCAST]) { 2138 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2139 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2140 } 2141 2142 if (ifm->ifi_flags || ifm->ifi_change) { 2143 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2144 if (err < 0) 2145 goto errout; 2146 } 2147 2148 if (tb[IFLA_MASTER]) { 2149 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 2150 if (err) 2151 goto errout; 2152 status |= DO_SETLINK_MODIFIED; 2153 } 2154 2155 if (tb[IFLA_CARRIER]) { 2156 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2157 if (err) 2158 goto errout; 2159 status |= DO_SETLINK_MODIFIED; 2160 } 2161 2162 if (tb[IFLA_TXQLEN]) { 2163 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]); 2164 unsigned int orig_len = dev->tx_queue_len; 2165 2166 if (dev->tx_queue_len ^ value) { 2167 dev->tx_queue_len = value; 2168 err = call_netdevice_notifiers( 2169 NETDEV_CHANGE_TX_QUEUE_LEN, dev); 2170 err = notifier_to_errno(err); 2171 if (err) { 2172 dev->tx_queue_len = orig_len; 2173 goto errout; 2174 } 2175 status |= DO_SETLINK_NOTIFY; 2176 } 2177 } 2178 2179 if (tb[IFLA_OPERSTATE]) 2180 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2181 2182 if (tb[IFLA_LINKMODE]) { 2183 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2184 2185 write_lock_bh(&dev_base_lock); 2186 if (dev->link_mode ^ value) 2187 status |= DO_SETLINK_NOTIFY; 2188 dev->link_mode = value; 2189 write_unlock_bh(&dev_base_lock); 2190 } 2191 2192 if (tb[IFLA_VFINFO_LIST]) { 2193 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2194 struct nlattr *attr; 2195 int rem; 2196 2197 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2198 if (nla_type(attr) != IFLA_VF_INFO || 2199 nla_len(attr) < NLA_HDRLEN) { 2200 err = -EINVAL; 2201 goto errout; 2202 } 2203 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 2204 ifla_vf_policy, NULL); 2205 if (err < 0) 2206 goto errout; 2207 err = do_setvfinfo(dev, vfinfo); 2208 if (err < 0) 2209 goto errout; 2210 status |= DO_SETLINK_NOTIFY; 2211 } 2212 } 2213 err = 0; 2214 2215 if (tb[IFLA_VF_PORTS]) { 2216 struct nlattr *port[IFLA_PORT_MAX+1]; 2217 struct nlattr *attr; 2218 int vf; 2219 int rem; 2220 2221 err = -EOPNOTSUPP; 2222 if (!ops->ndo_set_vf_port) 2223 goto errout; 2224 2225 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2226 if (nla_type(attr) != IFLA_VF_PORT || 2227 nla_len(attr) < NLA_HDRLEN) { 2228 err = -EINVAL; 2229 goto errout; 2230 } 2231 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 2232 ifla_port_policy, NULL); 2233 if (err < 0) 2234 goto errout; 2235 if (!port[IFLA_PORT_VF]) { 2236 err = -EOPNOTSUPP; 2237 goto errout; 2238 } 2239 vf = nla_get_u32(port[IFLA_PORT_VF]); 2240 err = ops->ndo_set_vf_port(dev, vf, port); 2241 if (err < 0) 2242 goto errout; 2243 status |= DO_SETLINK_NOTIFY; 2244 } 2245 } 2246 err = 0; 2247 2248 if (tb[IFLA_PORT_SELF]) { 2249 struct nlattr *port[IFLA_PORT_MAX+1]; 2250 2251 err = nla_parse_nested(port, IFLA_PORT_MAX, 2252 tb[IFLA_PORT_SELF], ifla_port_policy, 2253 NULL); 2254 if (err < 0) 2255 goto errout; 2256 2257 err = -EOPNOTSUPP; 2258 if (ops->ndo_set_vf_port) 2259 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2260 if (err < 0) 2261 goto errout; 2262 status |= DO_SETLINK_NOTIFY; 2263 } 2264 2265 if (tb[IFLA_AF_SPEC]) { 2266 struct nlattr *af; 2267 int rem; 2268 2269 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2270 const struct rtnl_af_ops *af_ops; 2271 2272 rcu_read_lock(); 2273 2274 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2275 BUG(); 2276 2277 err = af_ops->set_link_af(dev, af); 2278 if (err < 0) { 2279 rcu_read_unlock(); 2280 goto errout; 2281 } 2282 2283 rcu_read_unlock(); 2284 status |= DO_SETLINK_NOTIFY; 2285 } 2286 } 2287 err = 0; 2288 2289 if (tb[IFLA_PROTO_DOWN]) { 2290 err = dev_change_proto_down(dev, 2291 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2292 if (err) 2293 goto errout; 2294 status |= DO_SETLINK_NOTIFY; 2295 } 2296 2297 if (tb[IFLA_XDP]) { 2298 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2299 u32 xdp_flags = 0; 2300 2301 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2302 ifla_xdp_policy, NULL); 2303 if (err < 0) 2304 goto errout; 2305 2306 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) { 2307 err = -EINVAL; 2308 goto errout; 2309 } 2310 2311 if (xdp[IFLA_XDP_FLAGS]) { 2312 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2313 if (xdp_flags & ~XDP_FLAGS_MASK) { 2314 err = -EINVAL; 2315 goto errout; 2316 } 2317 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) { 2318 err = -EINVAL; 2319 goto errout; 2320 } 2321 } 2322 2323 if (xdp[IFLA_XDP_FD]) { 2324 err = dev_change_xdp_fd(dev, extack, 2325 nla_get_s32(xdp[IFLA_XDP_FD]), 2326 xdp_flags); 2327 if (err) 2328 goto errout; 2329 status |= DO_SETLINK_NOTIFY; 2330 } 2331 } 2332 2333 errout: 2334 if (status & DO_SETLINK_MODIFIED) { 2335 if (status & DO_SETLINK_NOTIFY) 2336 netdev_state_change(dev); 2337 2338 if (err < 0) 2339 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", 2340 dev->name); 2341 } 2342 2343 return err; 2344 } 2345 2346 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2347 struct netlink_ext_ack *extack) 2348 { 2349 struct net *net = sock_net(skb->sk); 2350 struct ifinfomsg *ifm; 2351 struct net_device *dev; 2352 int err; 2353 struct nlattr *tb[IFLA_MAX+1]; 2354 char ifname[IFNAMSIZ]; 2355 2356 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, 2357 extack); 2358 if (err < 0) 2359 goto errout; 2360 2361 if (tb[IFLA_IFNAME]) 2362 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2363 else 2364 ifname[0] = '\0'; 2365 2366 err = -EINVAL; 2367 ifm = nlmsg_data(nlh); 2368 if (ifm->ifi_index > 0) 2369 dev = __dev_get_by_index(net, ifm->ifi_index); 2370 else if (tb[IFLA_IFNAME]) 2371 dev = __dev_get_by_name(net, ifname); 2372 else 2373 goto errout; 2374 2375 if (dev == NULL) { 2376 err = -ENODEV; 2377 goto errout; 2378 } 2379 2380 err = validate_linkmsg(dev, tb); 2381 if (err < 0) 2382 goto errout; 2383 2384 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0); 2385 errout: 2386 return err; 2387 } 2388 2389 static int rtnl_group_dellink(const struct net *net, int group) 2390 { 2391 struct net_device *dev, *aux; 2392 LIST_HEAD(list_kill); 2393 bool found = false; 2394 2395 if (!group) 2396 return -EPERM; 2397 2398 for_each_netdev(net, dev) { 2399 if (dev->group == group) { 2400 const struct rtnl_link_ops *ops; 2401 2402 found = true; 2403 ops = dev->rtnl_link_ops; 2404 if (!ops || !ops->dellink) 2405 return -EOPNOTSUPP; 2406 } 2407 } 2408 2409 if (!found) 2410 return -ENODEV; 2411 2412 for_each_netdev_safe(net, dev, aux) { 2413 if (dev->group == group) { 2414 const struct rtnl_link_ops *ops; 2415 2416 ops = dev->rtnl_link_ops; 2417 ops->dellink(dev, &list_kill); 2418 } 2419 } 2420 unregister_netdevice_many(&list_kill); 2421 2422 return 0; 2423 } 2424 2425 int rtnl_delete_link(struct net_device *dev) 2426 { 2427 const struct rtnl_link_ops *ops; 2428 LIST_HEAD(list_kill); 2429 2430 ops = dev->rtnl_link_ops; 2431 if (!ops || !ops->dellink) 2432 return -EOPNOTSUPP; 2433 2434 ops->dellink(dev, &list_kill); 2435 unregister_netdevice_many(&list_kill); 2436 2437 return 0; 2438 } 2439 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2440 2441 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 2442 struct netlink_ext_ack *extack) 2443 { 2444 struct net *net = sock_net(skb->sk); 2445 struct net_device *dev; 2446 struct ifinfomsg *ifm; 2447 char ifname[IFNAMSIZ]; 2448 struct nlattr *tb[IFLA_MAX+1]; 2449 int err; 2450 2451 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2452 if (err < 0) 2453 return err; 2454 2455 if (tb[IFLA_IFNAME]) 2456 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2457 2458 ifm = nlmsg_data(nlh); 2459 if (ifm->ifi_index > 0) 2460 dev = __dev_get_by_index(net, ifm->ifi_index); 2461 else if (tb[IFLA_IFNAME]) 2462 dev = __dev_get_by_name(net, ifname); 2463 else if (tb[IFLA_GROUP]) 2464 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2465 else 2466 return -EINVAL; 2467 2468 if (!dev) 2469 return -ENODEV; 2470 2471 return rtnl_delete_link(dev); 2472 } 2473 2474 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2475 { 2476 unsigned int old_flags; 2477 int err; 2478 2479 old_flags = dev->flags; 2480 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2481 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2482 if (err < 0) 2483 return err; 2484 } 2485 2486 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2487 2488 __dev_notify_flags(dev, old_flags, ~0U); 2489 return 0; 2490 } 2491 EXPORT_SYMBOL(rtnl_configure_link); 2492 2493 struct net_device *rtnl_create_link(struct net *net, 2494 const char *ifname, unsigned char name_assign_type, 2495 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2496 { 2497 struct net_device *dev; 2498 unsigned int num_tx_queues = 1; 2499 unsigned int num_rx_queues = 1; 2500 2501 if (tb[IFLA_NUM_TX_QUEUES]) 2502 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2503 else if (ops->get_num_tx_queues) 2504 num_tx_queues = ops->get_num_tx_queues(); 2505 2506 if (tb[IFLA_NUM_RX_QUEUES]) 2507 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2508 else if (ops->get_num_rx_queues) 2509 num_rx_queues = ops->get_num_rx_queues(); 2510 2511 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2512 ops->setup, num_tx_queues, num_rx_queues); 2513 if (!dev) 2514 return ERR_PTR(-ENOMEM); 2515 2516 dev_net_set(dev, net); 2517 dev->rtnl_link_ops = ops; 2518 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2519 2520 if (tb[IFLA_MTU]) 2521 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2522 if (tb[IFLA_ADDRESS]) { 2523 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2524 nla_len(tb[IFLA_ADDRESS])); 2525 dev->addr_assign_type = NET_ADDR_SET; 2526 } 2527 if (tb[IFLA_BROADCAST]) 2528 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2529 nla_len(tb[IFLA_BROADCAST])); 2530 if (tb[IFLA_TXQLEN]) 2531 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2532 if (tb[IFLA_OPERSTATE]) 2533 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2534 if (tb[IFLA_LINKMODE]) 2535 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2536 if (tb[IFLA_GROUP]) 2537 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2538 2539 return dev; 2540 } 2541 EXPORT_SYMBOL(rtnl_create_link); 2542 2543 static int rtnl_group_changelink(const struct sk_buff *skb, 2544 struct net *net, int group, 2545 struct ifinfomsg *ifm, 2546 struct netlink_ext_ack *extack, 2547 struct nlattr **tb) 2548 { 2549 struct net_device *dev, *aux; 2550 int err; 2551 2552 for_each_netdev_safe(net, dev, aux) { 2553 if (dev->group == group) { 2554 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0); 2555 if (err < 0) 2556 return err; 2557 } 2558 } 2559 2560 return 0; 2561 } 2562 2563 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2564 struct netlink_ext_ack *extack) 2565 { 2566 struct net *net = sock_net(skb->sk); 2567 const struct rtnl_link_ops *ops; 2568 const struct rtnl_link_ops *m_ops = NULL; 2569 struct net_device *dev; 2570 struct net_device *master_dev = NULL; 2571 struct ifinfomsg *ifm; 2572 char kind[MODULE_NAME_LEN]; 2573 char ifname[IFNAMSIZ]; 2574 struct nlattr *tb[IFLA_MAX+1]; 2575 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2576 unsigned char name_assign_type = NET_NAME_USER; 2577 int err; 2578 2579 #ifdef CONFIG_MODULES 2580 replay: 2581 #endif 2582 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2583 if (err < 0) 2584 return err; 2585 2586 if (tb[IFLA_IFNAME]) 2587 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2588 else 2589 ifname[0] = '\0'; 2590 2591 ifm = nlmsg_data(nlh); 2592 if (ifm->ifi_index > 0) 2593 dev = __dev_get_by_index(net, ifm->ifi_index); 2594 else { 2595 if (ifname[0]) 2596 dev = __dev_get_by_name(net, ifname); 2597 else 2598 dev = NULL; 2599 } 2600 2601 if (dev) { 2602 master_dev = netdev_master_upper_dev_get(dev); 2603 if (master_dev) 2604 m_ops = master_dev->rtnl_link_ops; 2605 } 2606 2607 err = validate_linkmsg(dev, tb); 2608 if (err < 0) 2609 return err; 2610 2611 if (tb[IFLA_LINKINFO]) { 2612 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2613 tb[IFLA_LINKINFO], ifla_info_policy, 2614 NULL); 2615 if (err < 0) 2616 return err; 2617 } else 2618 memset(linkinfo, 0, sizeof(linkinfo)); 2619 2620 if (linkinfo[IFLA_INFO_KIND]) { 2621 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2622 ops = rtnl_link_ops_get(kind); 2623 } else { 2624 kind[0] = '\0'; 2625 ops = NULL; 2626 } 2627 2628 if (1) { 2629 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2630 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2631 struct nlattr **data = NULL; 2632 struct nlattr **slave_data = NULL; 2633 struct net *dest_net, *link_net = NULL; 2634 2635 if (ops) { 2636 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2637 err = nla_parse_nested(attr, ops->maxtype, 2638 linkinfo[IFLA_INFO_DATA], 2639 ops->policy, NULL); 2640 if (err < 0) 2641 return err; 2642 data = attr; 2643 } 2644 if (ops->validate) { 2645 err = ops->validate(tb, data, extack); 2646 if (err < 0) 2647 return err; 2648 } 2649 } 2650 2651 if (m_ops) { 2652 if (m_ops->slave_maxtype && 2653 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2654 err = nla_parse_nested(slave_attr, 2655 m_ops->slave_maxtype, 2656 linkinfo[IFLA_INFO_SLAVE_DATA], 2657 m_ops->slave_policy, 2658 NULL); 2659 if (err < 0) 2660 return err; 2661 slave_data = slave_attr; 2662 } 2663 } 2664 2665 if (dev) { 2666 int status = 0; 2667 2668 if (nlh->nlmsg_flags & NLM_F_EXCL) 2669 return -EEXIST; 2670 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2671 return -EOPNOTSUPP; 2672 2673 if (linkinfo[IFLA_INFO_DATA]) { 2674 if (!ops || ops != dev->rtnl_link_ops || 2675 !ops->changelink) 2676 return -EOPNOTSUPP; 2677 2678 err = ops->changelink(dev, tb, data, extack); 2679 if (err < 0) 2680 return err; 2681 status |= DO_SETLINK_NOTIFY; 2682 } 2683 2684 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2685 if (!m_ops || !m_ops->slave_changelink) 2686 return -EOPNOTSUPP; 2687 2688 err = m_ops->slave_changelink(master_dev, dev, 2689 tb, slave_data, 2690 extack); 2691 if (err < 0) 2692 return err; 2693 status |= DO_SETLINK_NOTIFY; 2694 } 2695 2696 return do_setlink(skb, dev, ifm, extack, tb, ifname, 2697 status); 2698 } 2699 2700 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2701 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2702 return rtnl_group_changelink(skb, net, 2703 nla_get_u32(tb[IFLA_GROUP]), 2704 ifm, extack, tb); 2705 return -ENODEV; 2706 } 2707 2708 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 2709 return -EOPNOTSUPP; 2710 2711 if (!ops) { 2712 #ifdef CONFIG_MODULES 2713 if (kind[0]) { 2714 __rtnl_unlock(); 2715 request_module("rtnl-link-%s", kind); 2716 rtnl_lock(); 2717 ops = rtnl_link_ops_get(kind); 2718 if (ops) 2719 goto replay; 2720 } 2721 #endif 2722 return -EOPNOTSUPP; 2723 } 2724 2725 if (!ops->setup) 2726 return -EOPNOTSUPP; 2727 2728 if (!ifname[0]) { 2729 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2730 name_assign_type = NET_NAME_ENUM; 2731 } 2732 2733 dest_net = rtnl_link_get_net(net, tb); 2734 if (IS_ERR(dest_net)) 2735 return PTR_ERR(dest_net); 2736 2737 err = -EPERM; 2738 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2739 goto out; 2740 2741 if (tb[IFLA_LINK_NETNSID]) { 2742 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2743 2744 link_net = get_net_ns_by_id(dest_net, id); 2745 if (!link_net) { 2746 err = -EINVAL; 2747 goto out; 2748 } 2749 err = -EPERM; 2750 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2751 goto out; 2752 } 2753 2754 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2755 name_assign_type, ops, tb); 2756 if (IS_ERR(dev)) { 2757 err = PTR_ERR(dev); 2758 goto out; 2759 } 2760 2761 dev->ifindex = ifm->ifi_index; 2762 2763 if (ops->newlink) { 2764 err = ops->newlink(link_net ? : net, dev, tb, data, 2765 extack); 2766 /* Drivers should call free_netdev() in ->destructor 2767 * and unregister it on failure after registration 2768 * so that device could be finally freed in rtnl_unlock. 2769 */ 2770 if (err < 0) { 2771 /* If device is not registered at all, free it now */ 2772 if (dev->reg_state == NETREG_UNINITIALIZED) 2773 free_netdev(dev); 2774 goto out; 2775 } 2776 } else { 2777 err = register_netdevice(dev); 2778 if (err < 0) { 2779 free_netdev(dev); 2780 goto out; 2781 } 2782 } 2783 err = rtnl_configure_link(dev, ifm); 2784 if (err < 0) 2785 goto out_unregister; 2786 if (link_net) { 2787 err = dev_change_net_namespace(dev, dest_net, ifname); 2788 if (err < 0) 2789 goto out_unregister; 2790 } 2791 if (tb[IFLA_MASTER]) { 2792 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), 2793 extack); 2794 if (err) 2795 goto out_unregister; 2796 } 2797 out: 2798 if (link_net) 2799 put_net(link_net); 2800 put_net(dest_net); 2801 return err; 2802 out_unregister: 2803 if (ops->newlink) { 2804 LIST_HEAD(list_kill); 2805 2806 ops->dellink(dev, &list_kill); 2807 unregister_netdevice_many(&list_kill); 2808 } else { 2809 unregister_netdevice(dev); 2810 } 2811 goto out; 2812 } 2813 } 2814 2815 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2816 struct netlink_ext_ack *extack) 2817 { 2818 struct net *net = sock_net(skb->sk); 2819 struct ifinfomsg *ifm; 2820 char ifname[IFNAMSIZ]; 2821 struct nlattr *tb[IFLA_MAX+1]; 2822 struct net_device *dev = NULL; 2823 struct sk_buff *nskb; 2824 int err; 2825 u32 ext_filter_mask = 0; 2826 2827 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2828 if (err < 0) 2829 return err; 2830 2831 if (tb[IFLA_IFNAME]) 2832 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2833 2834 if (tb[IFLA_EXT_MASK]) 2835 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2836 2837 ifm = nlmsg_data(nlh); 2838 if (ifm->ifi_index > 0) 2839 dev = __dev_get_by_index(net, ifm->ifi_index); 2840 else if (tb[IFLA_IFNAME]) 2841 dev = __dev_get_by_name(net, ifname); 2842 else 2843 return -EINVAL; 2844 2845 if (dev == NULL) 2846 return -ENODEV; 2847 2848 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2849 if (nskb == NULL) 2850 return -ENOBUFS; 2851 2852 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2853 nlh->nlmsg_seq, 0, 0, ext_filter_mask, 0, NULL); 2854 if (err < 0) { 2855 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2856 WARN_ON(err == -EMSGSIZE); 2857 kfree_skb(nskb); 2858 } else 2859 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2860 2861 return err; 2862 } 2863 2864 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2865 { 2866 struct net *net = sock_net(skb->sk); 2867 struct net_device *dev; 2868 struct nlattr *tb[IFLA_MAX+1]; 2869 u32 ext_filter_mask = 0; 2870 u16 min_ifinfo_dump_size = 0; 2871 int hdrlen; 2872 2873 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2874 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2875 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2876 2877 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { 2878 if (tb[IFLA_EXT_MASK]) 2879 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2880 } 2881 2882 if (!ext_filter_mask) 2883 return NLMSG_GOODSIZE; 2884 /* 2885 * traverse the list of net devices and compute the minimum 2886 * buffer size based upon the filter mask. 2887 */ 2888 rcu_read_lock(); 2889 for_each_netdev_rcu(net, dev) { 2890 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2891 if_nlmsg_size(dev, 2892 ext_filter_mask)); 2893 } 2894 rcu_read_unlock(); 2895 2896 return nlmsg_total_size(min_ifinfo_dump_size); 2897 } 2898 2899 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2900 { 2901 int idx; 2902 int s_idx = cb->family; 2903 2904 if (s_idx == 0) 2905 s_idx = 1; 2906 2907 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2908 int type = cb->nlh->nlmsg_type-RTM_BASE; 2909 struct rtnl_link *handlers; 2910 rtnl_dumpit_func dumpit; 2911 2912 if (idx < s_idx || idx == PF_PACKET) 2913 continue; 2914 2915 handlers = rtnl_dereference(rtnl_msg_handlers[idx]); 2916 if (!handlers) 2917 continue; 2918 2919 dumpit = READ_ONCE(handlers[type].dumpit); 2920 if (!dumpit) 2921 continue; 2922 2923 if (idx > s_idx) { 2924 memset(&cb->args[0], 0, sizeof(cb->args)); 2925 cb->prev_seq = 0; 2926 cb->seq = 0; 2927 } 2928 if (dumpit(skb, cb)) 2929 break; 2930 } 2931 cb->family = idx; 2932 2933 return skb->len; 2934 } 2935 2936 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2937 unsigned int change, 2938 u32 event, gfp_t flags, int *new_nsid) 2939 { 2940 struct net *net = dev_net(dev); 2941 struct sk_buff *skb; 2942 int err = -ENOBUFS; 2943 size_t if_info_size; 2944 2945 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2946 if (skb == NULL) 2947 goto errout; 2948 2949 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0, event, 2950 new_nsid); 2951 if (err < 0) { 2952 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2953 WARN_ON(err == -EMSGSIZE); 2954 kfree_skb(skb); 2955 goto errout; 2956 } 2957 return skb; 2958 errout: 2959 if (err < 0) 2960 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2961 return NULL; 2962 } 2963 2964 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2965 { 2966 struct net *net = dev_net(dev); 2967 2968 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2969 } 2970 2971 static void rtmsg_ifinfo_event(int type, struct net_device *dev, 2972 unsigned int change, u32 event, 2973 gfp_t flags, int *new_nsid) 2974 { 2975 struct sk_buff *skb; 2976 2977 if (dev->reg_state != NETREG_REGISTERED) 2978 return; 2979 2980 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid); 2981 if (skb) 2982 rtmsg_ifinfo_send(skb, dev, flags); 2983 } 2984 2985 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2986 gfp_t flags) 2987 { 2988 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, NULL); 2989 } 2990 EXPORT_SYMBOL(rtmsg_ifinfo); 2991 2992 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, 2993 gfp_t flags, int *new_nsid) 2994 { 2995 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 2996 new_nsid); 2997 } 2998 2999 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 3000 struct net_device *dev, 3001 u8 *addr, u16 vid, u32 pid, u32 seq, 3002 int type, unsigned int flags, 3003 int nlflags, u16 ndm_state) 3004 { 3005 struct nlmsghdr *nlh; 3006 struct ndmsg *ndm; 3007 3008 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 3009 if (!nlh) 3010 return -EMSGSIZE; 3011 3012 ndm = nlmsg_data(nlh); 3013 ndm->ndm_family = AF_BRIDGE; 3014 ndm->ndm_pad1 = 0; 3015 ndm->ndm_pad2 = 0; 3016 ndm->ndm_flags = flags; 3017 ndm->ndm_type = 0; 3018 ndm->ndm_ifindex = dev->ifindex; 3019 ndm->ndm_state = ndm_state; 3020 3021 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 3022 goto nla_put_failure; 3023 if (vid) 3024 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 3025 goto nla_put_failure; 3026 3027 nlmsg_end(skb, nlh); 3028 return 0; 3029 3030 nla_put_failure: 3031 nlmsg_cancel(skb, nlh); 3032 return -EMSGSIZE; 3033 } 3034 3035 static inline size_t rtnl_fdb_nlmsg_size(void) 3036 { 3037 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 3038 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 3039 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 3040 0; 3041 } 3042 3043 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 3044 u16 ndm_state) 3045 { 3046 struct net *net = dev_net(dev); 3047 struct sk_buff *skb; 3048 int err = -ENOBUFS; 3049 3050 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 3051 if (!skb) 3052 goto errout; 3053 3054 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 3055 0, 0, type, NTF_SELF, 0, ndm_state); 3056 if (err < 0) { 3057 kfree_skb(skb); 3058 goto errout; 3059 } 3060 3061 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 3062 return; 3063 errout: 3064 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 3065 } 3066 3067 /** 3068 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 3069 */ 3070 int ndo_dflt_fdb_add(struct ndmsg *ndm, 3071 struct nlattr *tb[], 3072 struct net_device *dev, 3073 const unsigned char *addr, u16 vid, 3074 u16 flags) 3075 { 3076 int err = -EINVAL; 3077 3078 /* If aging addresses are supported device will need to 3079 * implement its own handler for this. 3080 */ 3081 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 3082 pr_info("%s: FDB only supports static addresses\n", dev->name); 3083 return err; 3084 } 3085 3086 if (vid) { 3087 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 3088 return err; 3089 } 3090 3091 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3092 err = dev_uc_add_excl(dev, addr); 3093 else if (is_multicast_ether_addr(addr)) 3094 err = dev_mc_add_excl(dev, addr); 3095 3096 /* Only return duplicate errors if NLM_F_EXCL is set */ 3097 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 3098 err = 0; 3099 3100 return err; 3101 } 3102 EXPORT_SYMBOL(ndo_dflt_fdb_add); 3103 3104 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid, 3105 struct netlink_ext_ack *extack) 3106 { 3107 u16 vid = 0; 3108 3109 if (vlan_attr) { 3110 if (nla_len(vlan_attr) != sizeof(u16)) { 3111 NL_SET_ERR_MSG(extack, "invalid vlan attribute size"); 3112 return -EINVAL; 3113 } 3114 3115 vid = nla_get_u16(vlan_attr); 3116 3117 if (!vid || vid >= VLAN_VID_MASK) { 3118 NL_SET_ERR_MSG(extack, "invalid vlan id"); 3119 return -EINVAL; 3120 } 3121 } 3122 *p_vid = vid; 3123 return 0; 3124 } 3125 3126 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, 3127 struct netlink_ext_ack *extack) 3128 { 3129 struct net *net = sock_net(skb->sk); 3130 struct ndmsg *ndm; 3131 struct nlattr *tb[NDA_MAX+1]; 3132 struct net_device *dev; 3133 u8 *addr; 3134 u16 vid; 3135 int err; 3136 3137 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack); 3138 if (err < 0) 3139 return err; 3140 3141 ndm = nlmsg_data(nlh); 3142 if (ndm->ndm_ifindex == 0) { 3143 NL_SET_ERR_MSG(extack, "invalid ifindex"); 3144 return -EINVAL; 3145 } 3146 3147 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3148 if (dev == NULL) { 3149 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3150 return -ENODEV; 3151 } 3152 3153 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3154 NL_SET_ERR_MSG(extack, "invalid address"); 3155 return -EINVAL; 3156 } 3157 3158 addr = nla_data(tb[NDA_LLADDR]); 3159 3160 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 3161 if (err) 3162 return err; 3163 3164 err = -EOPNOTSUPP; 3165 3166 /* Support fdb on master device the net/bridge default case */ 3167 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3168 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3169 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3170 const struct net_device_ops *ops = br_dev->netdev_ops; 3171 3172 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 3173 nlh->nlmsg_flags); 3174 if (err) 3175 goto out; 3176 else 3177 ndm->ndm_flags &= ~NTF_MASTER; 3178 } 3179 3180 /* Embedded bridge, macvlan, and any other device support */ 3181 if ((ndm->ndm_flags & NTF_SELF)) { 3182 if (dev->netdev_ops->ndo_fdb_add) 3183 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 3184 vid, 3185 nlh->nlmsg_flags); 3186 else 3187 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 3188 nlh->nlmsg_flags); 3189 3190 if (!err) { 3191 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3192 ndm->ndm_state); 3193 ndm->ndm_flags &= ~NTF_SELF; 3194 } 3195 } 3196 out: 3197 return err; 3198 } 3199 3200 /** 3201 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3202 */ 3203 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3204 struct nlattr *tb[], 3205 struct net_device *dev, 3206 const unsigned char *addr, u16 vid) 3207 { 3208 int err = -EINVAL; 3209 3210 /* If aging addresses are supported device will need to 3211 * implement its own handler for this. 3212 */ 3213 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3214 pr_info("%s: FDB only supports static addresses\n", dev->name); 3215 return err; 3216 } 3217 3218 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3219 err = dev_uc_del(dev, addr); 3220 else if (is_multicast_ether_addr(addr)) 3221 err = dev_mc_del(dev, addr); 3222 3223 return err; 3224 } 3225 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3226 3227 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, 3228 struct netlink_ext_ack *extack) 3229 { 3230 struct net *net = sock_net(skb->sk); 3231 struct ndmsg *ndm; 3232 struct nlattr *tb[NDA_MAX+1]; 3233 struct net_device *dev; 3234 int err = -EINVAL; 3235 __u8 *addr; 3236 u16 vid; 3237 3238 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3239 return -EPERM; 3240 3241 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack); 3242 if (err < 0) 3243 return err; 3244 3245 ndm = nlmsg_data(nlh); 3246 if (ndm->ndm_ifindex == 0) { 3247 NL_SET_ERR_MSG(extack, "invalid ifindex"); 3248 return -EINVAL; 3249 } 3250 3251 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3252 if (dev == NULL) { 3253 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3254 return -ENODEV; 3255 } 3256 3257 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3258 NL_SET_ERR_MSG(extack, "invalid address"); 3259 return -EINVAL; 3260 } 3261 3262 addr = nla_data(tb[NDA_LLADDR]); 3263 3264 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 3265 if (err) 3266 return err; 3267 3268 err = -EOPNOTSUPP; 3269 3270 /* Support fdb on master device the net/bridge default case */ 3271 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3272 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3273 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3274 const struct net_device_ops *ops = br_dev->netdev_ops; 3275 3276 if (ops->ndo_fdb_del) 3277 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3278 3279 if (err) 3280 goto out; 3281 else 3282 ndm->ndm_flags &= ~NTF_MASTER; 3283 } 3284 3285 /* Embedded bridge, macvlan, and any other device support */ 3286 if (ndm->ndm_flags & NTF_SELF) { 3287 if (dev->netdev_ops->ndo_fdb_del) 3288 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3289 vid); 3290 else 3291 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3292 3293 if (!err) { 3294 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3295 ndm->ndm_state); 3296 ndm->ndm_flags &= ~NTF_SELF; 3297 } 3298 } 3299 out: 3300 return err; 3301 } 3302 3303 static int nlmsg_populate_fdb(struct sk_buff *skb, 3304 struct netlink_callback *cb, 3305 struct net_device *dev, 3306 int *idx, 3307 struct netdev_hw_addr_list *list) 3308 { 3309 struct netdev_hw_addr *ha; 3310 int err; 3311 u32 portid, seq; 3312 3313 portid = NETLINK_CB(cb->skb).portid; 3314 seq = cb->nlh->nlmsg_seq; 3315 3316 list_for_each_entry(ha, &list->list, list) { 3317 if (*idx < cb->args[2]) 3318 goto skip; 3319 3320 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3321 portid, seq, 3322 RTM_NEWNEIGH, NTF_SELF, 3323 NLM_F_MULTI, NUD_PERMANENT); 3324 if (err < 0) 3325 return err; 3326 skip: 3327 *idx += 1; 3328 } 3329 return 0; 3330 } 3331 3332 /** 3333 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3334 * @nlh: netlink message header 3335 * @dev: netdevice 3336 * 3337 * Default netdevice operation to dump the existing unicast address list. 3338 * Returns number of addresses from list put in skb. 3339 */ 3340 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3341 struct netlink_callback *cb, 3342 struct net_device *dev, 3343 struct net_device *filter_dev, 3344 int *idx) 3345 { 3346 int err; 3347 3348 netif_addr_lock_bh(dev); 3349 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3350 if (err) 3351 goto out; 3352 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3353 out: 3354 netif_addr_unlock_bh(dev); 3355 return err; 3356 } 3357 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3358 3359 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3360 { 3361 struct net_device *dev; 3362 struct nlattr *tb[IFLA_MAX+1]; 3363 struct net_device *br_dev = NULL; 3364 const struct net_device_ops *ops = NULL; 3365 const struct net_device_ops *cops = NULL; 3366 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3367 struct net *net = sock_net(skb->sk); 3368 struct hlist_head *head; 3369 int brport_idx = 0; 3370 int br_idx = 0; 3371 int h, s_h; 3372 int idx = 0, s_idx; 3373 int err = 0; 3374 int fidx = 0; 3375 3376 err = nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, 3377 IFLA_MAX, ifla_policy, NULL); 3378 if (err < 0) { 3379 return -EINVAL; 3380 } else if (err == 0) { 3381 if (tb[IFLA_MASTER]) 3382 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3383 } 3384 3385 brport_idx = ifm->ifi_index; 3386 3387 if (br_idx) { 3388 br_dev = __dev_get_by_index(net, br_idx); 3389 if (!br_dev) 3390 return -ENODEV; 3391 3392 ops = br_dev->netdev_ops; 3393 } 3394 3395 s_h = cb->args[0]; 3396 s_idx = cb->args[1]; 3397 3398 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3399 idx = 0; 3400 head = &net->dev_index_head[h]; 3401 hlist_for_each_entry(dev, head, index_hlist) { 3402 3403 if (brport_idx && (dev->ifindex != brport_idx)) 3404 continue; 3405 3406 if (!br_idx) { /* user did not specify a specific bridge */ 3407 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3408 br_dev = netdev_master_upper_dev_get(dev); 3409 cops = br_dev->netdev_ops; 3410 } 3411 } else { 3412 if (dev != br_dev && 3413 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3414 continue; 3415 3416 if (br_dev != netdev_master_upper_dev_get(dev) && 3417 !(dev->priv_flags & IFF_EBRIDGE)) 3418 continue; 3419 cops = ops; 3420 } 3421 3422 if (idx < s_idx) 3423 goto cont; 3424 3425 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3426 if (cops && cops->ndo_fdb_dump) { 3427 err = cops->ndo_fdb_dump(skb, cb, 3428 br_dev, dev, 3429 &fidx); 3430 if (err == -EMSGSIZE) 3431 goto out; 3432 } 3433 } 3434 3435 if (dev->netdev_ops->ndo_fdb_dump) 3436 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3437 dev, NULL, 3438 &fidx); 3439 else 3440 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3441 &fidx); 3442 if (err == -EMSGSIZE) 3443 goto out; 3444 3445 cops = NULL; 3446 3447 /* reset fdb offset to 0 for rest of the interfaces */ 3448 cb->args[2] = 0; 3449 fidx = 0; 3450 cont: 3451 idx++; 3452 } 3453 } 3454 3455 out: 3456 cb->args[0] = h; 3457 cb->args[1] = idx; 3458 cb->args[2] = fidx; 3459 3460 return skb->len; 3461 } 3462 3463 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3464 unsigned int attrnum, unsigned int flag) 3465 { 3466 if (mask & flag) 3467 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3468 return 0; 3469 } 3470 3471 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3472 struct net_device *dev, u16 mode, 3473 u32 flags, u32 mask, int nlflags, 3474 u32 filter_mask, 3475 int (*vlan_fill)(struct sk_buff *skb, 3476 struct net_device *dev, 3477 u32 filter_mask)) 3478 { 3479 struct nlmsghdr *nlh; 3480 struct ifinfomsg *ifm; 3481 struct nlattr *br_afspec; 3482 struct nlattr *protinfo; 3483 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3484 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3485 int err = 0; 3486 3487 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3488 if (nlh == NULL) 3489 return -EMSGSIZE; 3490 3491 ifm = nlmsg_data(nlh); 3492 ifm->ifi_family = AF_BRIDGE; 3493 ifm->__ifi_pad = 0; 3494 ifm->ifi_type = dev->type; 3495 ifm->ifi_index = dev->ifindex; 3496 ifm->ifi_flags = dev_get_flags(dev); 3497 ifm->ifi_change = 0; 3498 3499 3500 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3501 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3502 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3503 (br_dev && 3504 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3505 (dev->addr_len && 3506 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3507 (dev->ifindex != dev_get_iflink(dev) && 3508 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3509 goto nla_put_failure; 3510 3511 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3512 if (!br_afspec) 3513 goto nla_put_failure; 3514 3515 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3516 nla_nest_cancel(skb, br_afspec); 3517 goto nla_put_failure; 3518 } 3519 3520 if (mode != BRIDGE_MODE_UNDEF) { 3521 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3522 nla_nest_cancel(skb, br_afspec); 3523 goto nla_put_failure; 3524 } 3525 } 3526 if (vlan_fill) { 3527 err = vlan_fill(skb, dev, filter_mask); 3528 if (err) { 3529 nla_nest_cancel(skb, br_afspec); 3530 goto nla_put_failure; 3531 } 3532 } 3533 nla_nest_end(skb, br_afspec); 3534 3535 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3536 if (!protinfo) 3537 goto nla_put_failure; 3538 3539 if (brport_nla_put_flag(skb, flags, mask, 3540 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3541 brport_nla_put_flag(skb, flags, mask, 3542 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3543 brport_nla_put_flag(skb, flags, mask, 3544 IFLA_BRPORT_FAST_LEAVE, 3545 BR_MULTICAST_FAST_LEAVE) || 3546 brport_nla_put_flag(skb, flags, mask, 3547 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3548 brport_nla_put_flag(skb, flags, mask, 3549 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3550 brport_nla_put_flag(skb, flags, mask, 3551 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3552 brport_nla_put_flag(skb, flags, mask, 3553 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3554 brport_nla_put_flag(skb, flags, mask, 3555 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3556 nla_nest_cancel(skb, protinfo); 3557 goto nla_put_failure; 3558 } 3559 3560 nla_nest_end(skb, protinfo); 3561 3562 nlmsg_end(skb, nlh); 3563 return 0; 3564 nla_put_failure: 3565 nlmsg_cancel(skb, nlh); 3566 return err ? err : -EMSGSIZE; 3567 } 3568 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3569 3570 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3571 { 3572 struct net *net = sock_net(skb->sk); 3573 struct net_device *dev; 3574 int idx = 0; 3575 u32 portid = NETLINK_CB(cb->skb).portid; 3576 u32 seq = cb->nlh->nlmsg_seq; 3577 u32 filter_mask = 0; 3578 int err; 3579 3580 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3581 struct nlattr *extfilt; 3582 3583 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3584 IFLA_EXT_MASK); 3585 if (extfilt) { 3586 if (nla_len(extfilt) < sizeof(filter_mask)) 3587 return -EINVAL; 3588 3589 filter_mask = nla_get_u32(extfilt); 3590 } 3591 } 3592 3593 rcu_read_lock(); 3594 for_each_netdev_rcu(net, dev) { 3595 const struct net_device_ops *ops = dev->netdev_ops; 3596 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3597 3598 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3599 if (idx >= cb->args[0]) { 3600 err = br_dev->netdev_ops->ndo_bridge_getlink( 3601 skb, portid, seq, dev, 3602 filter_mask, NLM_F_MULTI); 3603 if (err < 0 && err != -EOPNOTSUPP) { 3604 if (likely(skb->len)) 3605 break; 3606 3607 goto out_err; 3608 } 3609 } 3610 idx++; 3611 } 3612 3613 if (ops->ndo_bridge_getlink) { 3614 if (idx >= cb->args[0]) { 3615 err = ops->ndo_bridge_getlink(skb, portid, 3616 seq, dev, 3617 filter_mask, 3618 NLM_F_MULTI); 3619 if (err < 0 && err != -EOPNOTSUPP) { 3620 if (likely(skb->len)) 3621 break; 3622 3623 goto out_err; 3624 } 3625 } 3626 idx++; 3627 } 3628 } 3629 err = skb->len; 3630 out_err: 3631 rcu_read_unlock(); 3632 cb->args[0] = idx; 3633 3634 return err; 3635 } 3636 3637 static inline size_t bridge_nlmsg_size(void) 3638 { 3639 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3640 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3641 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3642 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3643 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3644 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3645 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3646 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3647 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3648 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3649 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3650 } 3651 3652 static int rtnl_bridge_notify(struct net_device *dev) 3653 { 3654 struct net *net = dev_net(dev); 3655 struct sk_buff *skb; 3656 int err = -EOPNOTSUPP; 3657 3658 if (!dev->netdev_ops->ndo_bridge_getlink) 3659 return 0; 3660 3661 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3662 if (!skb) { 3663 err = -ENOMEM; 3664 goto errout; 3665 } 3666 3667 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3668 if (err < 0) 3669 goto errout; 3670 3671 if (!skb->len) 3672 goto errout; 3673 3674 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3675 return 0; 3676 errout: 3677 WARN_ON(err == -EMSGSIZE); 3678 kfree_skb(skb); 3679 if (err) 3680 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3681 return err; 3682 } 3683 3684 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3685 struct netlink_ext_ack *extack) 3686 { 3687 struct net *net = sock_net(skb->sk); 3688 struct ifinfomsg *ifm; 3689 struct net_device *dev; 3690 struct nlattr *br_spec, *attr = NULL; 3691 int rem, err = -EOPNOTSUPP; 3692 u16 flags = 0; 3693 bool have_flags = false; 3694 3695 if (nlmsg_len(nlh) < sizeof(*ifm)) 3696 return -EINVAL; 3697 3698 ifm = nlmsg_data(nlh); 3699 if (ifm->ifi_family != AF_BRIDGE) 3700 return -EPFNOSUPPORT; 3701 3702 dev = __dev_get_by_index(net, ifm->ifi_index); 3703 if (!dev) { 3704 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3705 return -ENODEV; 3706 } 3707 3708 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3709 if (br_spec) { 3710 nla_for_each_nested(attr, br_spec, rem) { 3711 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3712 if (nla_len(attr) < sizeof(flags)) 3713 return -EINVAL; 3714 3715 have_flags = true; 3716 flags = nla_get_u16(attr); 3717 break; 3718 } 3719 } 3720 } 3721 3722 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3723 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3724 3725 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3726 err = -EOPNOTSUPP; 3727 goto out; 3728 } 3729 3730 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3731 if (err) 3732 goto out; 3733 3734 flags &= ~BRIDGE_FLAGS_MASTER; 3735 } 3736 3737 if ((flags & BRIDGE_FLAGS_SELF)) { 3738 if (!dev->netdev_ops->ndo_bridge_setlink) 3739 err = -EOPNOTSUPP; 3740 else 3741 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3742 flags); 3743 if (!err) { 3744 flags &= ~BRIDGE_FLAGS_SELF; 3745 3746 /* Generate event to notify upper layer of bridge 3747 * change 3748 */ 3749 err = rtnl_bridge_notify(dev); 3750 } 3751 } 3752 3753 if (have_flags) 3754 memcpy(nla_data(attr), &flags, sizeof(flags)); 3755 out: 3756 return err; 3757 } 3758 3759 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 3760 struct netlink_ext_ack *extack) 3761 { 3762 struct net *net = sock_net(skb->sk); 3763 struct ifinfomsg *ifm; 3764 struct net_device *dev; 3765 struct nlattr *br_spec, *attr = NULL; 3766 int rem, err = -EOPNOTSUPP; 3767 u16 flags = 0; 3768 bool have_flags = false; 3769 3770 if (nlmsg_len(nlh) < sizeof(*ifm)) 3771 return -EINVAL; 3772 3773 ifm = nlmsg_data(nlh); 3774 if (ifm->ifi_family != AF_BRIDGE) 3775 return -EPFNOSUPPORT; 3776 3777 dev = __dev_get_by_index(net, ifm->ifi_index); 3778 if (!dev) { 3779 NL_SET_ERR_MSG(extack, "unknown ifindex"); 3780 return -ENODEV; 3781 } 3782 3783 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3784 if (br_spec) { 3785 nla_for_each_nested(attr, br_spec, rem) { 3786 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3787 if (nla_len(attr) < sizeof(flags)) 3788 return -EINVAL; 3789 3790 have_flags = true; 3791 flags = nla_get_u16(attr); 3792 break; 3793 } 3794 } 3795 } 3796 3797 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3798 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3799 3800 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3801 err = -EOPNOTSUPP; 3802 goto out; 3803 } 3804 3805 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3806 if (err) 3807 goto out; 3808 3809 flags &= ~BRIDGE_FLAGS_MASTER; 3810 } 3811 3812 if ((flags & BRIDGE_FLAGS_SELF)) { 3813 if (!dev->netdev_ops->ndo_bridge_dellink) 3814 err = -EOPNOTSUPP; 3815 else 3816 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3817 flags); 3818 3819 if (!err) { 3820 flags &= ~BRIDGE_FLAGS_SELF; 3821 3822 /* Generate event to notify upper layer of bridge 3823 * change 3824 */ 3825 err = rtnl_bridge_notify(dev); 3826 } 3827 } 3828 3829 if (have_flags) 3830 memcpy(nla_data(attr), &flags, sizeof(flags)); 3831 out: 3832 return err; 3833 } 3834 3835 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3836 { 3837 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3838 (!idxattr || idxattr == attrid); 3839 } 3840 3841 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3842 static int rtnl_get_offload_stats_attr_size(int attr_id) 3843 { 3844 switch (attr_id) { 3845 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3846 return sizeof(struct rtnl_link_stats64); 3847 } 3848 3849 return 0; 3850 } 3851 3852 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3853 int *prividx) 3854 { 3855 struct nlattr *attr = NULL; 3856 int attr_id, size; 3857 void *attr_data; 3858 int err; 3859 3860 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3861 dev->netdev_ops->ndo_get_offload_stats)) 3862 return -ENODATA; 3863 3864 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3865 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3866 if (attr_id < *prividx) 3867 continue; 3868 3869 size = rtnl_get_offload_stats_attr_size(attr_id); 3870 if (!size) 3871 continue; 3872 3873 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3874 continue; 3875 3876 attr = nla_reserve_64bit(skb, attr_id, size, 3877 IFLA_OFFLOAD_XSTATS_UNSPEC); 3878 if (!attr) 3879 goto nla_put_failure; 3880 3881 attr_data = nla_data(attr); 3882 memset(attr_data, 0, size); 3883 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3884 attr_data); 3885 if (err) 3886 goto get_offload_stats_failure; 3887 } 3888 3889 if (!attr) 3890 return -ENODATA; 3891 3892 *prividx = 0; 3893 return 0; 3894 3895 nla_put_failure: 3896 err = -EMSGSIZE; 3897 get_offload_stats_failure: 3898 *prividx = attr_id; 3899 return err; 3900 } 3901 3902 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3903 { 3904 int nla_size = 0; 3905 int attr_id; 3906 int size; 3907 3908 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3909 dev->netdev_ops->ndo_get_offload_stats)) 3910 return 0; 3911 3912 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3913 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3914 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3915 continue; 3916 size = rtnl_get_offload_stats_attr_size(attr_id); 3917 nla_size += nla_total_size_64bit(size); 3918 } 3919 3920 if (nla_size != 0) 3921 nla_size += nla_total_size(0); 3922 3923 return nla_size; 3924 } 3925 3926 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3927 int type, u32 pid, u32 seq, u32 change, 3928 unsigned int flags, unsigned int filter_mask, 3929 int *idxattr, int *prividx) 3930 { 3931 struct if_stats_msg *ifsm; 3932 struct nlmsghdr *nlh; 3933 struct nlattr *attr; 3934 int s_prividx = *prividx; 3935 int err; 3936 3937 ASSERT_RTNL(); 3938 3939 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3940 if (!nlh) 3941 return -EMSGSIZE; 3942 3943 ifsm = nlmsg_data(nlh); 3944 ifsm->family = PF_UNSPEC; 3945 ifsm->pad1 = 0; 3946 ifsm->pad2 = 0; 3947 ifsm->ifindex = dev->ifindex; 3948 ifsm->filter_mask = filter_mask; 3949 3950 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3951 struct rtnl_link_stats64 *sp; 3952 3953 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3954 sizeof(struct rtnl_link_stats64), 3955 IFLA_STATS_UNSPEC); 3956 if (!attr) 3957 goto nla_put_failure; 3958 3959 sp = nla_data(attr); 3960 dev_get_stats(dev, sp); 3961 } 3962 3963 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3964 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3965 3966 if (ops && ops->fill_linkxstats) { 3967 *idxattr = IFLA_STATS_LINK_XSTATS; 3968 attr = nla_nest_start(skb, 3969 IFLA_STATS_LINK_XSTATS); 3970 if (!attr) 3971 goto nla_put_failure; 3972 3973 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3974 nla_nest_end(skb, attr); 3975 if (err) 3976 goto nla_put_failure; 3977 *idxattr = 0; 3978 } 3979 } 3980 3981 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3982 *idxattr)) { 3983 const struct rtnl_link_ops *ops = NULL; 3984 const struct net_device *master; 3985 3986 master = netdev_master_upper_dev_get(dev); 3987 if (master) 3988 ops = master->rtnl_link_ops; 3989 if (ops && ops->fill_linkxstats) { 3990 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3991 attr = nla_nest_start(skb, 3992 IFLA_STATS_LINK_XSTATS_SLAVE); 3993 if (!attr) 3994 goto nla_put_failure; 3995 3996 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3997 nla_nest_end(skb, attr); 3998 if (err) 3999 goto nla_put_failure; 4000 *idxattr = 0; 4001 } 4002 } 4003 4004 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 4005 *idxattr)) { 4006 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 4007 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 4008 if (!attr) 4009 goto nla_put_failure; 4010 4011 err = rtnl_get_offload_stats(skb, dev, prividx); 4012 if (err == -ENODATA) 4013 nla_nest_cancel(skb, attr); 4014 else 4015 nla_nest_end(skb, attr); 4016 4017 if (err && err != -ENODATA) 4018 goto nla_put_failure; 4019 *idxattr = 0; 4020 } 4021 4022 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 4023 struct rtnl_af_ops *af_ops; 4024 4025 *idxattr = IFLA_STATS_AF_SPEC; 4026 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC); 4027 if (!attr) 4028 goto nla_put_failure; 4029 4030 rcu_read_lock(); 4031 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 4032 if (af_ops->fill_stats_af) { 4033 struct nlattr *af; 4034 int err; 4035 4036 af = nla_nest_start(skb, af_ops->family); 4037 if (!af) { 4038 rcu_read_unlock(); 4039 goto nla_put_failure; 4040 } 4041 err = af_ops->fill_stats_af(skb, dev); 4042 4043 if (err == -ENODATA) { 4044 nla_nest_cancel(skb, af); 4045 } else if (err < 0) { 4046 rcu_read_unlock(); 4047 goto nla_put_failure; 4048 } 4049 4050 nla_nest_end(skb, af); 4051 } 4052 } 4053 rcu_read_unlock(); 4054 4055 nla_nest_end(skb, attr); 4056 4057 *idxattr = 0; 4058 } 4059 4060 nlmsg_end(skb, nlh); 4061 4062 return 0; 4063 4064 nla_put_failure: 4065 /* not a multi message or no progress mean a real error */ 4066 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 4067 nlmsg_cancel(skb, nlh); 4068 else 4069 nlmsg_end(skb, nlh); 4070 4071 return -EMSGSIZE; 4072 } 4073 4074 static size_t if_nlmsg_stats_size(const struct net_device *dev, 4075 u32 filter_mask) 4076 { 4077 size_t size = 0; 4078 4079 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 4080 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 4081 4082 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 4083 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 4084 int attr = IFLA_STATS_LINK_XSTATS; 4085 4086 if (ops && ops->get_linkxstats_size) { 4087 size += nla_total_size(ops->get_linkxstats_size(dev, 4088 attr)); 4089 /* for IFLA_STATS_LINK_XSTATS */ 4090 size += nla_total_size(0); 4091 } 4092 } 4093 4094 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 4095 struct net_device *_dev = (struct net_device *)dev; 4096 const struct rtnl_link_ops *ops = NULL; 4097 const struct net_device *master; 4098 4099 /* netdev_master_upper_dev_get can't take const */ 4100 master = netdev_master_upper_dev_get(_dev); 4101 if (master) 4102 ops = master->rtnl_link_ops; 4103 if (ops && ops->get_linkxstats_size) { 4104 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 4105 4106 size += nla_total_size(ops->get_linkxstats_size(dev, 4107 attr)); 4108 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 4109 size += nla_total_size(0); 4110 } 4111 } 4112 4113 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 4114 size += rtnl_get_offload_stats_size(dev); 4115 4116 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 4117 struct rtnl_af_ops *af_ops; 4118 4119 /* for IFLA_STATS_AF_SPEC */ 4120 size += nla_total_size(0); 4121 4122 rcu_read_lock(); 4123 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 4124 if (af_ops->get_stats_af_size) { 4125 size += nla_total_size( 4126 af_ops->get_stats_af_size(dev)); 4127 4128 /* for AF_* */ 4129 size += nla_total_size(0); 4130 } 4131 } 4132 rcu_read_unlock(); 4133 } 4134 4135 return size; 4136 } 4137 4138 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, 4139 struct netlink_ext_ack *extack) 4140 { 4141 struct net *net = sock_net(skb->sk); 4142 struct net_device *dev = NULL; 4143 int idxattr = 0, prividx = 0; 4144 struct if_stats_msg *ifsm; 4145 struct sk_buff *nskb; 4146 u32 filter_mask; 4147 int err; 4148 4149 if (nlmsg_len(nlh) < sizeof(*ifsm)) 4150 return -EINVAL; 4151 4152 ifsm = nlmsg_data(nlh); 4153 if (ifsm->ifindex > 0) 4154 dev = __dev_get_by_index(net, ifsm->ifindex); 4155 else 4156 return -EINVAL; 4157 4158 if (!dev) 4159 return -ENODEV; 4160 4161 filter_mask = ifsm->filter_mask; 4162 if (!filter_mask) 4163 return -EINVAL; 4164 4165 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 4166 if (!nskb) 4167 return -ENOBUFS; 4168 4169 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 4170 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 4171 0, filter_mask, &idxattr, &prividx); 4172 if (err < 0) { 4173 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 4174 WARN_ON(err == -EMSGSIZE); 4175 kfree_skb(nskb); 4176 } else { 4177 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 4178 } 4179 4180 return err; 4181 } 4182 4183 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 4184 { 4185 int h, s_h, err, s_idx, s_idxattr, s_prividx; 4186 struct net *net = sock_net(skb->sk); 4187 unsigned int flags = NLM_F_MULTI; 4188 struct if_stats_msg *ifsm; 4189 struct hlist_head *head; 4190 struct net_device *dev; 4191 u32 filter_mask = 0; 4192 int idx = 0; 4193 4194 s_h = cb->args[0]; 4195 s_idx = cb->args[1]; 4196 s_idxattr = cb->args[2]; 4197 s_prividx = cb->args[3]; 4198 4199 cb->seq = net->dev_base_seq; 4200 4201 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) 4202 return -EINVAL; 4203 4204 ifsm = nlmsg_data(cb->nlh); 4205 filter_mask = ifsm->filter_mask; 4206 if (!filter_mask) 4207 return -EINVAL; 4208 4209 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4210 idx = 0; 4211 head = &net->dev_index_head[h]; 4212 hlist_for_each_entry(dev, head, index_hlist) { 4213 if (idx < s_idx) 4214 goto cont; 4215 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 4216 NETLINK_CB(cb->skb).portid, 4217 cb->nlh->nlmsg_seq, 0, 4218 flags, filter_mask, 4219 &s_idxattr, &s_prividx); 4220 /* If we ran out of room on the first message, 4221 * we're in trouble 4222 */ 4223 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 4224 4225 if (err < 0) 4226 goto out; 4227 s_prividx = 0; 4228 s_idxattr = 0; 4229 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 4230 cont: 4231 idx++; 4232 } 4233 } 4234 out: 4235 cb->args[3] = s_prividx; 4236 cb->args[2] = s_idxattr; 4237 cb->args[1] = idx; 4238 cb->args[0] = h; 4239 4240 return skb->len; 4241 } 4242 4243 /* Process one rtnetlink message. */ 4244 4245 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 4246 struct netlink_ext_ack *extack) 4247 { 4248 struct net *net = sock_net(skb->sk); 4249 struct rtnl_link *handlers; 4250 int err = -EOPNOTSUPP; 4251 rtnl_doit_func doit; 4252 unsigned int flags; 4253 int kind; 4254 int family; 4255 int type; 4256 4257 type = nlh->nlmsg_type; 4258 if (type > RTM_MAX) 4259 return -EOPNOTSUPP; 4260 4261 type -= RTM_BASE; 4262 4263 /* All the messages must have at least 1 byte length */ 4264 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 4265 return 0; 4266 4267 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 4268 kind = type&3; 4269 4270 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 4271 return -EPERM; 4272 4273 if (family >= ARRAY_SIZE(rtnl_msg_handlers)) 4274 family = PF_UNSPEC; 4275 4276 rcu_read_lock(); 4277 handlers = rcu_dereference(rtnl_msg_handlers[family]); 4278 if (!handlers) { 4279 family = PF_UNSPEC; 4280 handlers = rcu_dereference(rtnl_msg_handlers[family]); 4281 } 4282 4283 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 4284 struct sock *rtnl; 4285 rtnl_dumpit_func dumpit; 4286 u16 min_dump_alloc = 0; 4287 4288 dumpit = READ_ONCE(handlers[type].dumpit); 4289 if (!dumpit) { 4290 family = PF_UNSPEC; 4291 handlers = rcu_dereference(rtnl_msg_handlers[PF_UNSPEC]); 4292 if (!handlers) 4293 goto err_unlock; 4294 4295 dumpit = READ_ONCE(handlers[type].dumpit); 4296 if (!dumpit) 4297 goto err_unlock; 4298 } 4299 4300 refcount_inc(&rtnl_msg_handlers_ref[family]); 4301 4302 if (type == RTM_GETLINK - RTM_BASE) 4303 min_dump_alloc = rtnl_calcit(skb, nlh); 4304 4305 rcu_read_unlock(); 4306 4307 rtnl = net->rtnl; 4308 { 4309 struct netlink_dump_control c = { 4310 .dump = dumpit, 4311 .min_dump_alloc = min_dump_alloc, 4312 }; 4313 err = netlink_dump_start(rtnl, skb, nlh, &c); 4314 } 4315 refcount_dec(&rtnl_msg_handlers_ref[family]); 4316 return err; 4317 } 4318 4319 doit = READ_ONCE(handlers[type].doit); 4320 if (!doit) { 4321 family = PF_UNSPEC; 4322 handlers = rcu_dereference(rtnl_msg_handlers[family]); 4323 } 4324 4325 flags = READ_ONCE(handlers[type].flags); 4326 if (flags & RTNL_FLAG_DOIT_UNLOCKED) { 4327 refcount_inc(&rtnl_msg_handlers_ref[family]); 4328 doit = READ_ONCE(handlers[type].doit); 4329 rcu_read_unlock(); 4330 if (doit) 4331 err = doit(skb, nlh, extack); 4332 refcount_dec(&rtnl_msg_handlers_ref[family]); 4333 return err; 4334 } 4335 4336 rcu_read_unlock(); 4337 4338 rtnl_lock(); 4339 handlers = rtnl_dereference(rtnl_msg_handlers[family]); 4340 if (handlers) { 4341 doit = READ_ONCE(handlers[type].doit); 4342 if (doit) 4343 err = doit(skb, nlh, extack); 4344 } 4345 rtnl_unlock(); 4346 return err; 4347 4348 err_unlock: 4349 rcu_read_unlock(); 4350 return -EOPNOTSUPP; 4351 } 4352 4353 static void rtnetlink_rcv(struct sk_buff *skb) 4354 { 4355 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4356 } 4357 4358 static int rtnetlink_bind(struct net *net, int group) 4359 { 4360 switch (group) { 4361 case RTNLGRP_IPV4_MROUTE_R: 4362 case RTNLGRP_IPV6_MROUTE_R: 4363 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 4364 return -EPERM; 4365 break; 4366 } 4367 return 0; 4368 } 4369 4370 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4371 { 4372 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4373 4374 switch (event) { 4375 case NETDEV_REBOOT: 4376 case NETDEV_CHANGEADDR: 4377 case NETDEV_CHANGENAME: 4378 case NETDEV_FEAT_CHANGE: 4379 case NETDEV_BONDING_FAILOVER: 4380 case NETDEV_NOTIFY_PEERS: 4381 case NETDEV_RESEND_IGMP: 4382 case NETDEV_CHANGEINFODATA: 4383 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), 4384 GFP_KERNEL, NULL); 4385 break; 4386 default: 4387 break; 4388 } 4389 return NOTIFY_DONE; 4390 } 4391 4392 static struct notifier_block rtnetlink_dev_notifier = { 4393 .notifier_call = rtnetlink_event, 4394 }; 4395 4396 4397 static int __net_init rtnetlink_net_init(struct net *net) 4398 { 4399 struct sock *sk; 4400 struct netlink_kernel_cfg cfg = { 4401 .groups = RTNLGRP_MAX, 4402 .input = rtnetlink_rcv, 4403 .cb_mutex = &rtnl_mutex, 4404 .flags = NL_CFG_F_NONROOT_RECV, 4405 .bind = rtnetlink_bind, 4406 }; 4407 4408 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4409 if (!sk) 4410 return -ENOMEM; 4411 net->rtnl = sk; 4412 return 0; 4413 } 4414 4415 static void __net_exit rtnetlink_net_exit(struct net *net) 4416 { 4417 netlink_kernel_release(net->rtnl); 4418 net->rtnl = NULL; 4419 } 4420 4421 static struct pernet_operations rtnetlink_net_ops = { 4422 .init = rtnetlink_net_init, 4423 .exit = rtnetlink_net_exit, 4424 }; 4425 4426 void __init rtnetlink_init(void) 4427 { 4428 int i; 4429 4430 for (i = 0; i < ARRAY_SIZE(rtnl_msg_handlers_ref); i++) 4431 refcount_set(&rtnl_msg_handlers_ref[i], 1); 4432 4433 if (register_pernet_subsys(&rtnetlink_net_ops)) 4434 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4435 4436 register_netdevice_notifier(&rtnetlink_dev_notifier); 4437 4438 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4439 rtnl_dump_ifinfo, 0); 4440 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0); 4441 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0); 4442 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0); 4443 4444 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0); 4445 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); 4446 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); 4447 4448 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); 4449 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0); 4450 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, 0); 4451 4452 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0); 4453 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0); 4454 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0); 4455 4456 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4457 0); 4458 } 4459