1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * INET An implementation of the TCP/IP protocol suite for the LINUX 4 * operating system. INET is implemented using the BSD Socket 5 * interface as the means of communication with the user level. 6 * 7 * Routing netlink socket interface: protocol independent part. 8 * 9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 10 * 11 * Fixes: 12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong. 13 */ 14 15 #include <linux/bitops.h> 16 #include <linux/errno.h> 17 #include <linux/module.h> 18 #include <linux/types.h> 19 #include <linux/socket.h> 20 #include <linux/kernel.h> 21 #include <linux/timer.h> 22 #include <linux/string.h> 23 #include <linux/sockios.h> 24 #include <linux/net.h> 25 #include <linux/fcntl.h> 26 #include <linux/mm.h> 27 #include <linux/slab.h> 28 #include <linux/interrupt.h> 29 #include <linux/capability.h> 30 #include <linux/skbuff.h> 31 #include <linux/init.h> 32 #include <linux/security.h> 33 #include <linux/mutex.h> 34 #include <linux/if_addr.h> 35 #include <linux/if_bridge.h> 36 #include <linux/if_vlan.h> 37 #include <linux/pci.h> 38 #include <linux/etherdevice.h> 39 #include <linux/bpf.h> 40 41 #include <linux/uaccess.h> 42 43 #include <linux/inet.h> 44 #include <linux/netdevice.h> 45 #include <net/ip.h> 46 #include <net/protocol.h> 47 #include <net/arp.h> 48 #include <net/route.h> 49 #include <net/udp.h> 50 #include <net/tcp.h> 51 #include <net/sock.h> 52 #include <net/pkt_sched.h> 53 #include <net/fib_rules.h> 54 #include <net/rtnetlink.h> 55 #include <net/net_namespace.h> 56 57 #define RTNL_MAX_TYPE 50 58 #define RTNL_SLAVE_MAX_TYPE 40 59 60 struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 struct module *owner; 64 unsigned int flags; 65 struct rcu_head rcu; 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 int rtnl_lock_killable(void) 77 { 78 return mutex_lock_killable(&rtnl_mutex); 79 } 80 EXPORT_SYMBOL(rtnl_lock_killable); 81 82 static struct sk_buff *defer_kfree_skb_list; 83 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) 84 { 85 if (head && tail) { 86 tail->next = defer_kfree_skb_list; 87 defer_kfree_skb_list = head; 88 } 89 } 90 EXPORT_SYMBOL(rtnl_kfree_skbs); 91 92 void __rtnl_unlock(void) 93 { 94 struct sk_buff *head = defer_kfree_skb_list; 95 96 defer_kfree_skb_list = NULL; 97 98 mutex_unlock(&rtnl_mutex); 99 100 while (head) { 101 struct sk_buff *next = head->next; 102 103 kfree_skb(head); 104 cond_resched(); 105 head = next; 106 } 107 } 108 109 void rtnl_unlock(void) 110 { 111 /* This fellow will unlock it for us. */ 112 netdev_run_todo(); 113 } 114 EXPORT_SYMBOL(rtnl_unlock); 115 116 int rtnl_trylock(void) 117 { 118 return mutex_trylock(&rtnl_mutex); 119 } 120 EXPORT_SYMBOL(rtnl_trylock); 121 122 int rtnl_is_locked(void) 123 { 124 return mutex_is_locked(&rtnl_mutex); 125 } 126 EXPORT_SYMBOL(rtnl_is_locked); 127 128 bool refcount_dec_and_rtnl_lock(refcount_t *r) 129 { 130 return refcount_dec_and_mutex_lock(r, &rtnl_mutex); 131 } 132 EXPORT_SYMBOL(refcount_dec_and_rtnl_lock); 133 134 #ifdef CONFIG_PROVE_LOCKING 135 bool lockdep_rtnl_is_held(void) 136 { 137 return lockdep_is_held(&rtnl_mutex); 138 } 139 EXPORT_SYMBOL(lockdep_rtnl_is_held); 140 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 141 142 static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 143 144 static inline int rtm_msgindex(int msgtype) 145 { 146 int msgindex = msgtype - RTM_BASE; 147 148 /* 149 * msgindex < 0 implies someone tried to register a netlink 150 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 151 * the message type has not been added to linux/rtnetlink.h 152 */ 153 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 154 155 return msgindex; 156 } 157 158 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype) 159 { 160 struct rtnl_link __rcu **tab; 161 162 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers)) 163 protocol = PF_UNSPEC; 164 165 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]); 166 if (!tab) 167 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]); 168 169 return rcu_dereference_rtnl(tab[msgtype]); 170 } 171 172 static int rtnl_register_internal(struct module *owner, 173 int protocol, int msgtype, 174 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 175 unsigned int flags) 176 { 177 struct rtnl_link *link, *old; 178 struct rtnl_link __rcu **tab; 179 int msgindex; 180 int ret = -ENOBUFS; 181 182 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 183 msgindex = rtm_msgindex(msgtype); 184 185 rtnl_lock(); 186 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 187 if (tab == NULL) { 188 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL); 189 if (!tab) 190 goto unlock; 191 192 /* ensures we see the 0 stores */ 193 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab); 194 } 195 196 old = rtnl_dereference(tab[msgindex]); 197 if (old) { 198 link = kmemdup(old, sizeof(*old), GFP_KERNEL); 199 if (!link) 200 goto unlock; 201 } else { 202 link = kzalloc(sizeof(*link), GFP_KERNEL); 203 if (!link) 204 goto unlock; 205 } 206 207 WARN_ON(link->owner && link->owner != owner); 208 link->owner = owner; 209 210 WARN_ON(doit && link->doit && link->doit != doit); 211 if (doit) 212 link->doit = doit; 213 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit); 214 if (dumpit) 215 link->dumpit = dumpit; 216 217 link->flags |= flags; 218 219 /* publish protocol:msgtype */ 220 rcu_assign_pointer(tab[msgindex], link); 221 ret = 0; 222 if (old) 223 kfree_rcu(old, rcu); 224 unlock: 225 rtnl_unlock(); 226 return ret; 227 } 228 229 /** 230 * rtnl_register_module - Register a rtnetlink message type 231 * 232 * @owner: module registering the hook (THIS_MODULE) 233 * @protocol: Protocol family or PF_UNSPEC 234 * @msgtype: rtnetlink message type 235 * @doit: Function pointer called for each request message 236 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 237 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions 238 * 239 * Like rtnl_register, but for use by removable modules. 240 */ 241 int rtnl_register_module(struct module *owner, 242 int protocol, int msgtype, 243 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 244 unsigned int flags) 245 { 246 return rtnl_register_internal(owner, protocol, msgtype, 247 doit, dumpit, flags); 248 } 249 EXPORT_SYMBOL_GPL(rtnl_register_module); 250 251 /** 252 * rtnl_register - Register a rtnetlink message type 253 * @protocol: Protocol family or PF_UNSPEC 254 * @msgtype: rtnetlink message type 255 * @doit: Function pointer called for each request message 256 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 257 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions 258 * 259 * Registers the specified function pointers (at least one of them has 260 * to be non-NULL) to be called whenever a request message for the 261 * specified protocol family and message type is received. 262 * 263 * The special protocol family PF_UNSPEC may be used to define fallback 264 * function pointers for the case when no entry for the specific protocol 265 * family exists. 266 */ 267 void rtnl_register(int protocol, int msgtype, 268 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 269 unsigned int flags) 270 { 271 int err; 272 273 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit, 274 flags); 275 if (err) 276 pr_err("Unable to register rtnetlink message handler, " 277 "protocol = %d, message type = %d\n", protocol, msgtype); 278 } 279 280 /** 281 * rtnl_unregister - Unregister a rtnetlink message type 282 * @protocol: Protocol family or PF_UNSPEC 283 * @msgtype: rtnetlink message type 284 * 285 * Returns 0 on success or a negative error code. 286 */ 287 int rtnl_unregister(int protocol, int msgtype) 288 { 289 struct rtnl_link __rcu **tab; 290 struct rtnl_link *link; 291 int msgindex; 292 293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 294 msgindex = rtm_msgindex(msgtype); 295 296 rtnl_lock(); 297 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 298 if (!tab) { 299 rtnl_unlock(); 300 return -ENOENT; 301 } 302 303 link = rtnl_dereference(tab[msgindex]); 304 rcu_assign_pointer(tab[msgindex], NULL); 305 rtnl_unlock(); 306 307 kfree_rcu(link, rcu); 308 309 return 0; 310 } 311 EXPORT_SYMBOL_GPL(rtnl_unregister); 312 313 /** 314 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 315 * @protocol : Protocol family or PF_UNSPEC 316 * 317 * Identical to calling rtnl_unregster() for all registered message types 318 * of a certain protocol family. 319 */ 320 void rtnl_unregister_all(int protocol) 321 { 322 struct rtnl_link __rcu **tab; 323 struct rtnl_link *link; 324 int msgindex; 325 326 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 327 328 rtnl_lock(); 329 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 330 if (!tab) { 331 rtnl_unlock(); 332 return; 333 } 334 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL); 335 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) { 336 link = rtnl_dereference(tab[msgindex]); 337 if (!link) 338 continue; 339 340 rcu_assign_pointer(tab[msgindex], NULL); 341 kfree_rcu(link, rcu); 342 } 343 rtnl_unlock(); 344 345 synchronize_net(); 346 347 kfree(tab); 348 } 349 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 350 351 static LIST_HEAD(link_ops); 352 353 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 354 { 355 const struct rtnl_link_ops *ops; 356 357 list_for_each_entry(ops, &link_ops, list) { 358 if (!strcmp(ops->kind, kind)) 359 return ops; 360 } 361 return NULL; 362 } 363 364 /** 365 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 366 * @ops: struct rtnl_link_ops * to register 367 * 368 * The caller must hold the rtnl_mutex. This function should be used 369 * by drivers that create devices during module initialization. It 370 * must be called before registering the devices. 371 * 372 * Returns 0 on success or a negative error code. 373 */ 374 int __rtnl_link_register(struct rtnl_link_ops *ops) 375 { 376 if (rtnl_link_ops_get(ops->kind)) 377 return -EEXIST; 378 379 /* The check for alloc/setup is here because if ops 380 * does not have that filled up, it is not possible 381 * to use the ops for creating device. So do not 382 * fill up dellink as well. That disables rtnl_dellink. 383 */ 384 if ((ops->alloc || ops->setup) && !ops->dellink) 385 ops->dellink = unregister_netdevice_queue; 386 387 list_add_tail(&ops->list, &link_ops); 388 return 0; 389 } 390 EXPORT_SYMBOL_GPL(__rtnl_link_register); 391 392 /** 393 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 394 * @ops: struct rtnl_link_ops * to register 395 * 396 * Returns 0 on success or a negative error code. 397 */ 398 int rtnl_link_register(struct rtnl_link_ops *ops) 399 { 400 int err; 401 402 /* Sanity-check max sizes to avoid stack buffer overflow. */ 403 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE || 404 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)) 405 return -EINVAL; 406 407 rtnl_lock(); 408 err = __rtnl_link_register(ops); 409 rtnl_unlock(); 410 return err; 411 } 412 EXPORT_SYMBOL_GPL(rtnl_link_register); 413 414 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 415 { 416 struct net_device *dev; 417 LIST_HEAD(list_kill); 418 419 for_each_netdev(net, dev) { 420 if (dev->rtnl_link_ops == ops) 421 ops->dellink(dev, &list_kill); 422 } 423 unregister_netdevice_many(&list_kill); 424 } 425 426 /** 427 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 428 * @ops: struct rtnl_link_ops * to unregister 429 * 430 * The caller must hold the rtnl_mutex and guarantee net_namespace_list 431 * integrity (hold pernet_ops_rwsem for writing to close the race 432 * with setup_net() and cleanup_net()). 433 */ 434 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 435 { 436 struct net *net; 437 438 for_each_net(net) { 439 __rtnl_kill_links(net, ops); 440 } 441 list_del(&ops->list); 442 } 443 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 444 445 /* Return with the rtnl_lock held when there are no network 446 * devices unregistering in any network namespace. 447 */ 448 static void rtnl_lock_unregistering_all(void) 449 { 450 struct net *net; 451 bool unregistering; 452 DEFINE_WAIT_FUNC(wait, woken_wake_function); 453 454 add_wait_queue(&netdev_unregistering_wq, &wait); 455 for (;;) { 456 unregistering = false; 457 rtnl_lock(); 458 /* We held write locked pernet_ops_rwsem, and parallel 459 * setup_net() and cleanup_net() are not possible. 460 */ 461 for_each_net(net) { 462 if (net->dev_unreg_count > 0) { 463 unregistering = true; 464 break; 465 } 466 } 467 if (!unregistering) 468 break; 469 __rtnl_unlock(); 470 471 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 472 } 473 remove_wait_queue(&netdev_unregistering_wq, &wait); 474 } 475 476 /** 477 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 478 * @ops: struct rtnl_link_ops * to unregister 479 */ 480 void rtnl_link_unregister(struct rtnl_link_ops *ops) 481 { 482 /* Close the race with setup_net() and cleanup_net() */ 483 down_write(&pernet_ops_rwsem); 484 rtnl_lock_unregistering_all(); 485 __rtnl_link_unregister(ops); 486 rtnl_unlock(); 487 up_write(&pernet_ops_rwsem); 488 } 489 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 490 491 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 492 { 493 struct net_device *master_dev; 494 const struct rtnl_link_ops *ops; 495 size_t size = 0; 496 497 rcu_read_lock(); 498 499 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 500 if (!master_dev) 501 goto out; 502 503 ops = master_dev->rtnl_link_ops; 504 if (!ops || !ops->get_slave_size) 505 goto out; 506 /* IFLA_INFO_SLAVE_DATA + nested data */ 507 size = nla_total_size(sizeof(struct nlattr)) + 508 ops->get_slave_size(master_dev, dev); 509 510 out: 511 rcu_read_unlock(); 512 return size; 513 } 514 515 static size_t rtnl_link_get_size(const struct net_device *dev) 516 { 517 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 518 size_t size; 519 520 if (!ops) 521 return 0; 522 523 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 524 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 525 526 if (ops->get_size) 527 /* IFLA_INFO_DATA + nested data */ 528 size += nla_total_size(sizeof(struct nlattr)) + 529 ops->get_size(dev); 530 531 if (ops->get_xstats_size) 532 /* IFLA_INFO_XSTATS */ 533 size += nla_total_size(ops->get_xstats_size(dev)); 534 535 size += rtnl_link_get_slave_info_data_size(dev); 536 537 return size; 538 } 539 540 static LIST_HEAD(rtnl_af_ops); 541 542 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 543 { 544 const struct rtnl_af_ops *ops; 545 546 ASSERT_RTNL(); 547 548 list_for_each_entry(ops, &rtnl_af_ops, list) { 549 if (ops->family == family) 550 return ops; 551 } 552 553 return NULL; 554 } 555 556 /** 557 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 558 * @ops: struct rtnl_af_ops * to register 559 * 560 * Returns 0 on success or a negative error code. 561 */ 562 void rtnl_af_register(struct rtnl_af_ops *ops) 563 { 564 rtnl_lock(); 565 list_add_tail_rcu(&ops->list, &rtnl_af_ops); 566 rtnl_unlock(); 567 } 568 EXPORT_SYMBOL_GPL(rtnl_af_register); 569 570 /** 571 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 572 * @ops: struct rtnl_af_ops * to unregister 573 */ 574 void rtnl_af_unregister(struct rtnl_af_ops *ops) 575 { 576 rtnl_lock(); 577 list_del_rcu(&ops->list); 578 rtnl_unlock(); 579 580 synchronize_rcu(); 581 } 582 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 583 584 static size_t rtnl_link_get_af_size(const struct net_device *dev, 585 u32 ext_filter_mask) 586 { 587 struct rtnl_af_ops *af_ops; 588 size_t size; 589 590 /* IFLA_AF_SPEC */ 591 size = nla_total_size(sizeof(struct nlattr)); 592 593 rcu_read_lock(); 594 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 595 if (af_ops->get_link_af_size) { 596 /* AF_* + nested data */ 597 size += nla_total_size(sizeof(struct nlattr)) + 598 af_ops->get_link_af_size(dev, ext_filter_mask); 599 } 600 } 601 rcu_read_unlock(); 602 603 return size; 604 } 605 606 static bool rtnl_have_link_slave_info(const struct net_device *dev) 607 { 608 struct net_device *master_dev; 609 bool ret = false; 610 611 rcu_read_lock(); 612 613 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 614 if (master_dev && master_dev->rtnl_link_ops) 615 ret = true; 616 rcu_read_unlock(); 617 return ret; 618 } 619 620 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 621 const struct net_device *dev) 622 { 623 struct net_device *master_dev; 624 const struct rtnl_link_ops *ops; 625 struct nlattr *slave_data; 626 int err; 627 628 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 629 if (!master_dev) 630 return 0; 631 ops = master_dev->rtnl_link_ops; 632 if (!ops) 633 return 0; 634 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 635 return -EMSGSIZE; 636 if (ops->fill_slave_info) { 637 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA); 638 if (!slave_data) 639 return -EMSGSIZE; 640 err = ops->fill_slave_info(skb, master_dev, dev); 641 if (err < 0) 642 goto err_cancel_slave_data; 643 nla_nest_end(skb, slave_data); 644 } 645 return 0; 646 647 err_cancel_slave_data: 648 nla_nest_cancel(skb, slave_data); 649 return err; 650 } 651 652 static int rtnl_link_info_fill(struct sk_buff *skb, 653 const struct net_device *dev) 654 { 655 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 656 struct nlattr *data; 657 int err; 658 659 if (!ops) 660 return 0; 661 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 662 return -EMSGSIZE; 663 if (ops->fill_xstats) { 664 err = ops->fill_xstats(skb, dev); 665 if (err < 0) 666 return err; 667 } 668 if (ops->fill_info) { 669 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA); 670 if (data == NULL) 671 return -EMSGSIZE; 672 err = ops->fill_info(skb, dev); 673 if (err < 0) 674 goto err_cancel_data; 675 nla_nest_end(skb, data); 676 } 677 return 0; 678 679 err_cancel_data: 680 nla_nest_cancel(skb, data); 681 return err; 682 } 683 684 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 685 { 686 struct nlattr *linkinfo; 687 int err = -EMSGSIZE; 688 689 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO); 690 if (linkinfo == NULL) 691 goto out; 692 693 err = rtnl_link_info_fill(skb, dev); 694 if (err < 0) 695 goto err_cancel_link; 696 697 err = rtnl_link_slave_info_fill(skb, dev); 698 if (err < 0) 699 goto err_cancel_link; 700 701 nla_nest_end(skb, linkinfo); 702 return 0; 703 704 err_cancel_link: 705 nla_nest_cancel(skb, linkinfo); 706 out: 707 return err; 708 } 709 710 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 711 { 712 struct sock *rtnl = net->rtnl; 713 714 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL); 715 } 716 717 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 718 { 719 struct sock *rtnl = net->rtnl; 720 721 return nlmsg_unicast(rtnl, skb, pid); 722 } 723 EXPORT_SYMBOL(rtnl_unicast); 724 725 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 726 struct nlmsghdr *nlh, gfp_t flags) 727 { 728 struct sock *rtnl = net->rtnl; 729 730 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags); 731 } 732 EXPORT_SYMBOL(rtnl_notify); 733 734 void rtnl_set_sk_err(struct net *net, u32 group, int error) 735 { 736 struct sock *rtnl = net->rtnl; 737 738 netlink_set_err(rtnl, 0, group, error); 739 } 740 EXPORT_SYMBOL(rtnl_set_sk_err); 741 742 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 743 { 744 struct nlattr *mx; 745 int i, valid = 0; 746 747 /* nothing is dumped for dst_default_metrics, so just skip the loop */ 748 if (metrics == dst_default_metrics.metrics) 749 return 0; 750 751 mx = nla_nest_start_noflag(skb, RTA_METRICS); 752 if (mx == NULL) 753 return -ENOBUFS; 754 755 for (i = 0; i < RTAX_MAX; i++) { 756 if (metrics[i]) { 757 if (i == RTAX_CC_ALGO - 1) { 758 char tmp[TCP_CA_NAME_MAX], *name; 759 760 name = tcp_ca_get_name_by_key(metrics[i], tmp); 761 if (!name) 762 continue; 763 if (nla_put_string(skb, i + 1, name)) 764 goto nla_put_failure; 765 } else if (i == RTAX_FEATURES - 1) { 766 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 767 768 if (!user_features) 769 continue; 770 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 771 if (nla_put_u32(skb, i + 1, user_features)) 772 goto nla_put_failure; 773 } else { 774 if (nla_put_u32(skb, i + 1, metrics[i])) 775 goto nla_put_failure; 776 } 777 valid++; 778 } 779 } 780 781 if (!valid) { 782 nla_nest_cancel(skb, mx); 783 return 0; 784 } 785 786 return nla_nest_end(skb, mx); 787 788 nla_put_failure: 789 nla_nest_cancel(skb, mx); 790 return -EMSGSIZE; 791 } 792 EXPORT_SYMBOL(rtnetlink_put_metrics); 793 794 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 795 long expires, u32 error) 796 { 797 struct rta_cacheinfo ci = { 798 .rta_error = error, 799 .rta_id = id, 800 }; 801 802 if (dst) { 803 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse); 804 ci.rta_used = dst->__use; 805 ci.rta_clntref = atomic_read(&dst->__refcnt); 806 } 807 if (expires) { 808 unsigned long clock; 809 810 clock = jiffies_to_clock_t(abs(expires)); 811 clock = min_t(unsigned long, clock, INT_MAX); 812 ci.rta_expires = (expires > 0) ? clock : -clock; 813 } 814 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 815 } 816 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 817 818 static void set_operstate(struct net_device *dev, unsigned char transition) 819 { 820 unsigned char operstate = dev->operstate; 821 822 switch (transition) { 823 case IF_OPER_UP: 824 if ((operstate == IF_OPER_DORMANT || 825 operstate == IF_OPER_TESTING || 826 operstate == IF_OPER_UNKNOWN) && 827 !netif_dormant(dev) && !netif_testing(dev)) 828 operstate = IF_OPER_UP; 829 break; 830 831 case IF_OPER_TESTING: 832 if (operstate == IF_OPER_UP || 833 operstate == IF_OPER_UNKNOWN) 834 operstate = IF_OPER_TESTING; 835 break; 836 837 case IF_OPER_DORMANT: 838 if (operstate == IF_OPER_UP || 839 operstate == IF_OPER_UNKNOWN) 840 operstate = IF_OPER_DORMANT; 841 break; 842 } 843 844 if (dev->operstate != operstate) { 845 write_lock(&dev_base_lock); 846 dev->operstate = operstate; 847 write_unlock(&dev_base_lock); 848 netdev_state_change(dev); 849 } 850 } 851 852 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 853 { 854 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 855 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 856 } 857 858 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 859 const struct ifinfomsg *ifm) 860 { 861 unsigned int flags = ifm->ifi_flags; 862 863 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 864 if (ifm->ifi_change) 865 flags = (flags & ifm->ifi_change) | 866 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 867 868 return flags; 869 } 870 871 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 872 const struct rtnl_link_stats64 *b) 873 { 874 a->rx_packets = b->rx_packets; 875 a->tx_packets = b->tx_packets; 876 a->rx_bytes = b->rx_bytes; 877 a->tx_bytes = b->tx_bytes; 878 a->rx_errors = b->rx_errors; 879 a->tx_errors = b->tx_errors; 880 a->rx_dropped = b->rx_dropped; 881 a->tx_dropped = b->tx_dropped; 882 883 a->multicast = b->multicast; 884 a->collisions = b->collisions; 885 886 a->rx_length_errors = b->rx_length_errors; 887 a->rx_over_errors = b->rx_over_errors; 888 a->rx_crc_errors = b->rx_crc_errors; 889 a->rx_frame_errors = b->rx_frame_errors; 890 a->rx_fifo_errors = b->rx_fifo_errors; 891 a->rx_missed_errors = b->rx_missed_errors; 892 893 a->tx_aborted_errors = b->tx_aborted_errors; 894 a->tx_carrier_errors = b->tx_carrier_errors; 895 a->tx_fifo_errors = b->tx_fifo_errors; 896 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 897 a->tx_window_errors = b->tx_window_errors; 898 899 a->rx_compressed = b->rx_compressed; 900 a->tx_compressed = b->tx_compressed; 901 902 a->rx_nohandler = b->rx_nohandler; 903 } 904 905 /* All VF info */ 906 static inline int rtnl_vfinfo_size(const struct net_device *dev, 907 u32 ext_filter_mask) 908 { 909 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) { 910 int num_vfs = dev_num_vf(dev->dev.parent); 911 size_t size = nla_total_size(0); 912 size += num_vfs * 913 (nla_total_size(0) + 914 nla_total_size(sizeof(struct ifla_vf_mac)) + 915 nla_total_size(sizeof(struct ifla_vf_broadcast)) + 916 nla_total_size(sizeof(struct ifla_vf_vlan)) + 917 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ 918 nla_total_size(MAX_VLAN_LIST_LEN * 919 sizeof(struct ifla_vf_vlan_info)) + 920 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 921 nla_total_size(sizeof(struct ifla_vf_tx_rate)) + 922 nla_total_size(sizeof(struct ifla_vf_rate)) + 923 nla_total_size(sizeof(struct ifla_vf_link_state)) + 924 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 925 nla_total_size(0) + /* nest IFLA_VF_STATS */ 926 /* IFLA_VF_STATS_RX_PACKETS */ 927 nla_total_size_64bit(sizeof(__u64)) + 928 /* IFLA_VF_STATS_TX_PACKETS */ 929 nla_total_size_64bit(sizeof(__u64)) + 930 /* IFLA_VF_STATS_RX_BYTES */ 931 nla_total_size_64bit(sizeof(__u64)) + 932 /* IFLA_VF_STATS_TX_BYTES */ 933 nla_total_size_64bit(sizeof(__u64)) + 934 /* IFLA_VF_STATS_BROADCAST */ 935 nla_total_size_64bit(sizeof(__u64)) + 936 /* IFLA_VF_STATS_MULTICAST */ 937 nla_total_size_64bit(sizeof(__u64)) + 938 /* IFLA_VF_STATS_RX_DROPPED */ 939 nla_total_size_64bit(sizeof(__u64)) + 940 /* IFLA_VF_STATS_TX_DROPPED */ 941 nla_total_size_64bit(sizeof(__u64)) + 942 nla_total_size(sizeof(struct ifla_vf_trust))); 943 return size; 944 } else 945 return 0; 946 } 947 948 static size_t rtnl_port_size(const struct net_device *dev, 949 u32 ext_filter_mask) 950 { 951 size_t port_size = nla_total_size(4) /* PORT_VF */ 952 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 953 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 954 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 955 + nla_total_size(1) /* PROT_VDP_REQUEST */ 956 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 957 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 958 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 959 + port_size; 960 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 961 + port_size; 962 963 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 964 !(ext_filter_mask & RTEXT_FILTER_VF)) 965 return 0; 966 if (dev_num_vf(dev->dev.parent)) 967 return port_self_size + vf_ports_size + 968 vf_port_size * dev_num_vf(dev->dev.parent); 969 else 970 return port_self_size; 971 } 972 973 static size_t rtnl_xdp_size(void) 974 { 975 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ 976 nla_total_size(1) + /* XDP_ATTACHED */ 977 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */ 978 nla_total_size(4); /* XDP_<mode>_PROG_ID */ 979 980 return xdp_size; 981 } 982 983 static size_t rtnl_prop_list_size(const struct net_device *dev) 984 { 985 struct netdev_name_node *name_node; 986 size_t size; 987 988 if (list_empty(&dev->name_node->list)) 989 return 0; 990 size = nla_total_size(0); 991 list_for_each_entry(name_node, &dev->name_node->list, list) 992 size += nla_total_size(ALTIFNAMSIZ); 993 return size; 994 } 995 996 static size_t rtnl_proto_down_size(const struct net_device *dev) 997 { 998 size_t size = nla_total_size(1); 999 1000 if (dev->proto_down_reason) 1001 size += nla_total_size(0) + nla_total_size(4); 1002 1003 return size; 1004 } 1005 1006 static noinline size_t if_nlmsg_size(const struct net_device *dev, 1007 u32 ext_filter_mask) 1008 { 1009 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 1010 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 1011 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 1012 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 1013 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 1014 + nla_total_size(sizeof(struct rtnl_link_stats)) 1015 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 1016 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 1017 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 1018 + nla_total_size(4) /* IFLA_TXQLEN */ 1019 + nla_total_size(4) /* IFLA_WEIGHT */ 1020 + nla_total_size(4) /* IFLA_MTU */ 1021 + nla_total_size(4) /* IFLA_LINK */ 1022 + nla_total_size(4) /* IFLA_MASTER */ 1023 + nla_total_size(1) /* IFLA_CARRIER */ 1024 + nla_total_size(4) /* IFLA_PROMISCUITY */ 1025 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 1026 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 1027 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 1028 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 1029 + nla_total_size(1) /* IFLA_OPERSTATE */ 1030 + nla_total_size(1) /* IFLA_LINKMODE */ 1031 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 1032 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 1033 + nla_total_size(4) /* IFLA_GROUP */ 1034 + nla_total_size(ext_filter_mask 1035 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 1036 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 1037 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 1038 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 1039 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 1040 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 1041 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 1042 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 1043 + rtnl_xdp_size() /* IFLA_XDP */ 1044 + nla_total_size(4) /* IFLA_EVENT */ 1045 + nla_total_size(4) /* IFLA_NEW_NETNSID */ 1046 + nla_total_size(4) /* IFLA_NEW_IFINDEX */ 1047 + rtnl_proto_down_size(dev) /* proto down */ 1048 + nla_total_size(4) /* IFLA_TARGET_NETNSID */ 1049 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */ 1050 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */ 1051 + nla_total_size(4) /* IFLA_MIN_MTU */ 1052 + nla_total_size(4) /* IFLA_MAX_MTU */ 1053 + rtnl_prop_list_size(dev) 1054 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */ 1055 + 0; 1056 } 1057 1058 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 1059 { 1060 struct nlattr *vf_ports; 1061 struct nlattr *vf_port; 1062 int vf; 1063 int err; 1064 1065 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS); 1066 if (!vf_ports) 1067 return -EMSGSIZE; 1068 1069 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 1070 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT); 1071 if (!vf_port) 1072 goto nla_put_failure; 1073 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 1074 goto nla_put_failure; 1075 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 1076 if (err == -EMSGSIZE) 1077 goto nla_put_failure; 1078 if (err) { 1079 nla_nest_cancel(skb, vf_port); 1080 continue; 1081 } 1082 nla_nest_end(skb, vf_port); 1083 } 1084 1085 nla_nest_end(skb, vf_ports); 1086 1087 return 0; 1088 1089 nla_put_failure: 1090 nla_nest_cancel(skb, vf_ports); 1091 return -EMSGSIZE; 1092 } 1093 1094 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 1095 { 1096 struct nlattr *port_self; 1097 int err; 1098 1099 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF); 1100 if (!port_self) 1101 return -EMSGSIZE; 1102 1103 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 1104 if (err) { 1105 nla_nest_cancel(skb, port_self); 1106 return (err == -EMSGSIZE) ? err : 0; 1107 } 1108 1109 nla_nest_end(skb, port_self); 1110 1111 return 0; 1112 } 1113 1114 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1115 u32 ext_filter_mask) 1116 { 1117 int err; 1118 1119 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1120 !(ext_filter_mask & RTEXT_FILTER_VF)) 1121 return 0; 1122 1123 err = rtnl_port_self_fill(skb, dev); 1124 if (err) 1125 return err; 1126 1127 if (dev_num_vf(dev->dev.parent)) { 1128 err = rtnl_vf_ports_fill(skb, dev); 1129 if (err) 1130 return err; 1131 } 1132 1133 return 0; 1134 } 1135 1136 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1137 { 1138 int err; 1139 struct netdev_phys_item_id ppid; 1140 1141 err = dev_get_phys_port_id(dev, &ppid); 1142 if (err) { 1143 if (err == -EOPNOTSUPP) 1144 return 0; 1145 return err; 1146 } 1147 1148 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1149 return -EMSGSIZE; 1150 1151 return 0; 1152 } 1153 1154 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1155 { 1156 char name[IFNAMSIZ]; 1157 int err; 1158 1159 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1160 if (err) { 1161 if (err == -EOPNOTSUPP) 1162 return 0; 1163 return err; 1164 } 1165 1166 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name)) 1167 return -EMSGSIZE; 1168 1169 return 0; 1170 } 1171 1172 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1173 { 1174 struct netdev_phys_item_id ppid = { }; 1175 int err; 1176 1177 err = dev_get_port_parent_id(dev, &ppid, false); 1178 if (err) { 1179 if (err == -EOPNOTSUPP) 1180 return 0; 1181 return err; 1182 } 1183 1184 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id)) 1185 return -EMSGSIZE; 1186 1187 return 0; 1188 } 1189 1190 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1191 struct net_device *dev) 1192 { 1193 struct rtnl_link_stats64 *sp; 1194 struct nlattr *attr; 1195 1196 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1197 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1198 if (!attr) 1199 return -EMSGSIZE; 1200 1201 sp = nla_data(attr); 1202 dev_get_stats(dev, sp); 1203 1204 attr = nla_reserve(skb, IFLA_STATS, 1205 sizeof(struct rtnl_link_stats)); 1206 if (!attr) 1207 return -EMSGSIZE; 1208 1209 copy_rtnl_link_stats(nla_data(attr), sp); 1210 1211 return 0; 1212 } 1213 1214 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1215 struct net_device *dev, 1216 int vfs_num, 1217 struct nlattr *vfinfo) 1218 { 1219 struct ifla_vf_rss_query_en vf_rss_query_en; 1220 struct nlattr *vf, *vfstats, *vfvlanlist; 1221 struct ifla_vf_link_state vf_linkstate; 1222 struct ifla_vf_vlan_info vf_vlan_info; 1223 struct ifla_vf_spoofchk vf_spoofchk; 1224 struct ifla_vf_tx_rate vf_tx_rate; 1225 struct ifla_vf_stats vf_stats; 1226 struct ifla_vf_trust vf_trust; 1227 struct ifla_vf_vlan vf_vlan; 1228 struct ifla_vf_rate vf_rate; 1229 struct ifla_vf_mac vf_mac; 1230 struct ifla_vf_broadcast vf_broadcast; 1231 struct ifla_vf_info ivi; 1232 struct ifla_vf_guid node_guid; 1233 struct ifla_vf_guid port_guid; 1234 1235 memset(&ivi, 0, sizeof(ivi)); 1236 1237 /* Not all SR-IOV capable drivers support the 1238 * spoofcheck and "RSS query enable" query. Preset to 1239 * -1 so the user space tool can detect that the driver 1240 * didn't report anything. 1241 */ 1242 ivi.spoofchk = -1; 1243 ivi.rss_query_en = -1; 1244 ivi.trusted = -1; 1245 /* The default value for VF link state is "auto" 1246 * IFLA_VF_LINK_STATE_AUTO which equals zero 1247 */ 1248 ivi.linkstate = 0; 1249 /* VLAN Protocol by default is 802.1Q */ 1250 ivi.vlan_proto = htons(ETH_P_8021Q); 1251 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1252 return 0; 1253 1254 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1255 memset(&node_guid, 0, sizeof(node_guid)); 1256 memset(&port_guid, 0, sizeof(port_guid)); 1257 1258 vf_mac.vf = 1259 vf_vlan.vf = 1260 vf_vlan_info.vf = 1261 vf_rate.vf = 1262 vf_tx_rate.vf = 1263 vf_spoofchk.vf = 1264 vf_linkstate.vf = 1265 vf_rss_query_en.vf = 1266 vf_trust.vf = 1267 node_guid.vf = 1268 port_guid.vf = ivi.vf; 1269 1270 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1271 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len); 1272 vf_vlan.vlan = ivi.vlan; 1273 vf_vlan.qos = ivi.qos; 1274 vf_vlan_info.vlan = ivi.vlan; 1275 vf_vlan_info.qos = ivi.qos; 1276 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1277 vf_tx_rate.rate = ivi.max_tx_rate; 1278 vf_rate.min_tx_rate = ivi.min_tx_rate; 1279 vf_rate.max_tx_rate = ivi.max_tx_rate; 1280 vf_spoofchk.setting = ivi.spoofchk; 1281 vf_linkstate.link_state = ivi.linkstate; 1282 vf_rss_query_en.setting = ivi.rss_query_en; 1283 vf_trust.setting = ivi.trusted; 1284 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO); 1285 if (!vf) 1286 goto nla_put_vfinfo_failure; 1287 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1288 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) || 1289 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1290 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1291 &vf_rate) || 1292 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1293 &vf_tx_rate) || 1294 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1295 &vf_spoofchk) || 1296 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1297 &vf_linkstate) || 1298 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1299 sizeof(vf_rss_query_en), 1300 &vf_rss_query_en) || 1301 nla_put(skb, IFLA_VF_TRUST, 1302 sizeof(vf_trust), &vf_trust)) 1303 goto nla_put_vf_failure; 1304 1305 if (dev->netdev_ops->ndo_get_vf_guid && 1306 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid, 1307 &port_guid)) { 1308 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid), 1309 &node_guid) || 1310 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid), 1311 &port_guid)) 1312 goto nla_put_vf_failure; 1313 } 1314 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST); 1315 if (!vfvlanlist) 1316 goto nla_put_vf_failure; 1317 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1318 &vf_vlan_info)) { 1319 nla_nest_cancel(skb, vfvlanlist); 1320 goto nla_put_vf_failure; 1321 } 1322 nla_nest_end(skb, vfvlanlist); 1323 memset(&vf_stats, 0, sizeof(vf_stats)); 1324 if (dev->netdev_ops->ndo_get_vf_stats) 1325 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1326 &vf_stats); 1327 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS); 1328 if (!vfstats) 1329 goto nla_put_vf_failure; 1330 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1331 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1332 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1333 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1334 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1335 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1336 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1337 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1338 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1339 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1340 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1341 vf_stats.multicast, IFLA_VF_STATS_PAD) || 1342 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED, 1343 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) || 1344 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED, 1345 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) { 1346 nla_nest_cancel(skb, vfstats); 1347 goto nla_put_vf_failure; 1348 } 1349 nla_nest_end(skb, vfstats); 1350 nla_nest_end(skb, vf); 1351 return 0; 1352 1353 nla_put_vf_failure: 1354 nla_nest_cancel(skb, vf); 1355 nla_put_vfinfo_failure: 1356 nla_nest_cancel(skb, vfinfo); 1357 return -EMSGSIZE; 1358 } 1359 1360 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb, 1361 struct net_device *dev, 1362 u32 ext_filter_mask) 1363 { 1364 struct nlattr *vfinfo; 1365 int i, num_vfs; 1366 1367 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0)) 1368 return 0; 1369 1370 num_vfs = dev_num_vf(dev->dev.parent); 1371 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs)) 1372 return -EMSGSIZE; 1373 1374 if (!dev->netdev_ops->ndo_get_vf_config) 1375 return 0; 1376 1377 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST); 1378 if (!vfinfo) 1379 return -EMSGSIZE; 1380 1381 for (i = 0; i < num_vfs; i++) { 1382 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1383 return -EMSGSIZE; 1384 } 1385 1386 nla_nest_end(skb, vfinfo); 1387 return 0; 1388 } 1389 1390 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1391 { 1392 struct rtnl_link_ifmap map; 1393 1394 memset(&map, 0, sizeof(map)); 1395 map.mem_start = dev->mem_start; 1396 map.mem_end = dev->mem_end; 1397 map.base_addr = dev->base_addr; 1398 map.irq = dev->irq; 1399 map.dma = dev->dma; 1400 map.port = dev->if_port; 1401 1402 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1403 return -EMSGSIZE; 1404 1405 return 0; 1406 } 1407 1408 static u32 rtnl_xdp_prog_skb(struct net_device *dev) 1409 { 1410 const struct bpf_prog *generic_xdp_prog; 1411 1412 ASSERT_RTNL(); 1413 1414 generic_xdp_prog = rtnl_dereference(dev->xdp_prog); 1415 if (!generic_xdp_prog) 1416 return 0; 1417 return generic_xdp_prog->aux->id; 1418 } 1419 1420 static u32 rtnl_xdp_prog_drv(struct net_device *dev) 1421 { 1422 return dev_xdp_prog_id(dev, XDP_MODE_DRV); 1423 } 1424 1425 static u32 rtnl_xdp_prog_hw(struct net_device *dev) 1426 { 1427 return dev_xdp_prog_id(dev, XDP_MODE_HW); 1428 } 1429 1430 static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev, 1431 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr, 1432 u32 (*get_prog_id)(struct net_device *dev)) 1433 { 1434 u32 curr_id; 1435 int err; 1436 1437 curr_id = get_prog_id(dev); 1438 if (!curr_id) 1439 return 0; 1440 1441 *prog_id = curr_id; 1442 err = nla_put_u32(skb, attr, curr_id); 1443 if (err) 1444 return err; 1445 1446 if (*mode != XDP_ATTACHED_NONE) 1447 *mode = XDP_ATTACHED_MULTI; 1448 else 1449 *mode = tgt_mode; 1450 1451 return 0; 1452 } 1453 1454 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1455 { 1456 struct nlattr *xdp; 1457 u32 prog_id; 1458 int err; 1459 u8 mode; 1460 1461 xdp = nla_nest_start_noflag(skb, IFLA_XDP); 1462 if (!xdp) 1463 return -EMSGSIZE; 1464 1465 prog_id = 0; 1466 mode = XDP_ATTACHED_NONE; 1467 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB, 1468 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb); 1469 if (err) 1470 goto err_cancel; 1471 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV, 1472 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv); 1473 if (err) 1474 goto err_cancel; 1475 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW, 1476 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw); 1477 if (err) 1478 goto err_cancel; 1479 1480 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode); 1481 if (err) 1482 goto err_cancel; 1483 1484 if (prog_id && mode != XDP_ATTACHED_MULTI) { 1485 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id); 1486 if (err) 1487 goto err_cancel; 1488 } 1489 1490 nla_nest_end(skb, xdp); 1491 return 0; 1492 1493 err_cancel: 1494 nla_nest_cancel(skb, xdp); 1495 return err; 1496 } 1497 1498 static u32 rtnl_get_event(unsigned long event) 1499 { 1500 u32 rtnl_event_type = IFLA_EVENT_NONE; 1501 1502 switch (event) { 1503 case NETDEV_REBOOT: 1504 rtnl_event_type = IFLA_EVENT_REBOOT; 1505 break; 1506 case NETDEV_FEAT_CHANGE: 1507 rtnl_event_type = IFLA_EVENT_FEATURES; 1508 break; 1509 case NETDEV_BONDING_FAILOVER: 1510 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER; 1511 break; 1512 case NETDEV_NOTIFY_PEERS: 1513 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS; 1514 break; 1515 case NETDEV_RESEND_IGMP: 1516 rtnl_event_type = IFLA_EVENT_IGMP_RESEND; 1517 break; 1518 case NETDEV_CHANGEINFODATA: 1519 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS; 1520 break; 1521 default: 1522 break; 1523 } 1524 1525 return rtnl_event_type; 1526 } 1527 1528 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev) 1529 { 1530 const struct net_device *upper_dev; 1531 int ret = 0; 1532 1533 rcu_read_lock(); 1534 1535 upper_dev = netdev_master_upper_dev_get_rcu(dev); 1536 if (upper_dev) 1537 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex); 1538 1539 rcu_read_unlock(); 1540 return ret; 1541 } 1542 1543 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev, 1544 bool force) 1545 { 1546 int ifindex = dev_get_iflink(dev); 1547 1548 if (force || dev->ifindex != ifindex) 1549 return nla_put_u32(skb, IFLA_LINK, ifindex); 1550 1551 return 0; 1552 } 1553 1554 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb, 1555 struct net_device *dev) 1556 { 1557 char buf[IFALIASZ]; 1558 int ret; 1559 1560 ret = dev_get_alias(dev, buf, sizeof(buf)); 1561 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0; 1562 } 1563 1564 static int rtnl_fill_link_netnsid(struct sk_buff *skb, 1565 const struct net_device *dev, 1566 struct net *src_net, gfp_t gfp) 1567 { 1568 bool put_iflink = false; 1569 1570 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) { 1571 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1572 1573 if (!net_eq(dev_net(dev), link_net)) { 1574 int id = peernet2id_alloc(src_net, link_net, gfp); 1575 1576 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1577 return -EMSGSIZE; 1578 1579 put_iflink = true; 1580 } 1581 } 1582 1583 return nla_put_iflink(skb, dev, put_iflink); 1584 } 1585 1586 static int rtnl_fill_link_af(struct sk_buff *skb, 1587 const struct net_device *dev, 1588 u32 ext_filter_mask) 1589 { 1590 const struct rtnl_af_ops *af_ops; 1591 struct nlattr *af_spec; 1592 1593 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 1594 if (!af_spec) 1595 return -EMSGSIZE; 1596 1597 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 1598 struct nlattr *af; 1599 int err; 1600 1601 if (!af_ops->fill_link_af) 1602 continue; 1603 1604 af = nla_nest_start_noflag(skb, af_ops->family); 1605 if (!af) 1606 return -EMSGSIZE; 1607 1608 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1609 /* 1610 * Caller may return ENODATA to indicate that there 1611 * was no data to be dumped. This is not an error, it 1612 * means we should trim the attribute header and 1613 * continue. 1614 */ 1615 if (err == -ENODATA) 1616 nla_nest_cancel(skb, af); 1617 else if (err < 0) 1618 return -EMSGSIZE; 1619 1620 nla_nest_end(skb, af); 1621 } 1622 1623 nla_nest_end(skb, af_spec); 1624 return 0; 1625 } 1626 1627 static int rtnl_fill_alt_ifnames(struct sk_buff *skb, 1628 const struct net_device *dev) 1629 { 1630 struct netdev_name_node *name_node; 1631 int count = 0; 1632 1633 list_for_each_entry(name_node, &dev->name_node->list, list) { 1634 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name)) 1635 return -EMSGSIZE; 1636 count++; 1637 } 1638 return count; 1639 } 1640 1641 static int rtnl_fill_prop_list(struct sk_buff *skb, 1642 const struct net_device *dev) 1643 { 1644 struct nlattr *prop_list; 1645 int ret; 1646 1647 prop_list = nla_nest_start(skb, IFLA_PROP_LIST); 1648 if (!prop_list) 1649 return -EMSGSIZE; 1650 1651 ret = rtnl_fill_alt_ifnames(skb, dev); 1652 if (ret <= 0) 1653 goto nest_cancel; 1654 1655 nla_nest_end(skb, prop_list); 1656 return 0; 1657 1658 nest_cancel: 1659 nla_nest_cancel(skb, prop_list); 1660 return ret; 1661 } 1662 1663 static int rtnl_fill_proto_down(struct sk_buff *skb, 1664 const struct net_device *dev) 1665 { 1666 struct nlattr *pr; 1667 u32 preason; 1668 1669 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1670 goto nla_put_failure; 1671 1672 preason = dev->proto_down_reason; 1673 if (!preason) 1674 return 0; 1675 1676 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON); 1677 if (!pr) 1678 return -EMSGSIZE; 1679 1680 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) { 1681 nla_nest_cancel(skb, pr); 1682 goto nla_put_failure; 1683 } 1684 1685 nla_nest_end(skb, pr); 1686 return 0; 1687 1688 nla_put_failure: 1689 return -EMSGSIZE; 1690 } 1691 1692 static int rtnl_fill_ifinfo(struct sk_buff *skb, 1693 struct net_device *dev, struct net *src_net, 1694 int type, u32 pid, u32 seq, u32 change, 1695 unsigned int flags, u32 ext_filter_mask, 1696 u32 event, int *new_nsid, int new_ifindex, 1697 int tgt_netnsid, gfp_t gfp) 1698 { 1699 struct ifinfomsg *ifm; 1700 struct nlmsghdr *nlh; 1701 struct Qdisc *qdisc; 1702 1703 ASSERT_RTNL(); 1704 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1705 if (nlh == NULL) 1706 return -EMSGSIZE; 1707 1708 ifm = nlmsg_data(nlh); 1709 ifm->ifi_family = AF_UNSPEC; 1710 ifm->__ifi_pad = 0; 1711 ifm->ifi_type = dev->type; 1712 ifm->ifi_index = dev->ifindex; 1713 ifm->ifi_flags = dev_get_flags(dev); 1714 ifm->ifi_change = change; 1715 1716 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid)) 1717 goto nla_put_failure; 1718 1719 qdisc = rtnl_dereference(dev->qdisc); 1720 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1721 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1722 nla_put_u8(skb, IFLA_OPERSTATE, 1723 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1724 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1725 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1726 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) || 1727 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) || 1728 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1729 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1730 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1731 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1732 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1733 #ifdef CONFIG_RPS 1734 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1735 #endif 1736 put_master_ifindex(skb, dev) || 1737 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1738 (qdisc && 1739 nla_put_string(skb, IFLA_QDISC, qdisc->ops->id)) || 1740 nla_put_ifalias(skb, dev) || 1741 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1742 atomic_read(&dev->carrier_up_count) + 1743 atomic_read(&dev->carrier_down_count)) || 1744 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT, 1745 atomic_read(&dev->carrier_up_count)) || 1746 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT, 1747 atomic_read(&dev->carrier_down_count))) 1748 goto nla_put_failure; 1749 1750 if (rtnl_fill_proto_down(skb, dev)) 1751 goto nla_put_failure; 1752 1753 if (event != IFLA_EVENT_NONE) { 1754 if (nla_put_u32(skb, IFLA_EVENT, event)) 1755 goto nla_put_failure; 1756 } 1757 1758 if (rtnl_fill_link_ifmap(skb, dev)) 1759 goto nla_put_failure; 1760 1761 if (dev->addr_len) { 1762 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1763 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1764 goto nla_put_failure; 1765 } 1766 1767 if (rtnl_phys_port_id_fill(skb, dev)) 1768 goto nla_put_failure; 1769 1770 if (rtnl_phys_port_name_fill(skb, dev)) 1771 goto nla_put_failure; 1772 1773 if (rtnl_phys_switch_id_fill(skb, dev)) 1774 goto nla_put_failure; 1775 1776 if (rtnl_fill_stats(skb, dev)) 1777 goto nla_put_failure; 1778 1779 if (rtnl_fill_vf(skb, dev, ext_filter_mask)) 1780 goto nla_put_failure; 1781 1782 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1783 goto nla_put_failure; 1784 1785 if (rtnl_xdp_fill(skb, dev)) 1786 goto nla_put_failure; 1787 1788 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1789 if (rtnl_link_fill(skb, dev) < 0) 1790 goto nla_put_failure; 1791 } 1792 1793 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp)) 1794 goto nla_put_failure; 1795 1796 if (new_nsid && 1797 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0) 1798 goto nla_put_failure; 1799 if (new_ifindex && 1800 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0) 1801 goto nla_put_failure; 1802 1803 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) && 1804 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr)) 1805 goto nla_put_failure; 1806 1807 rcu_read_lock(); 1808 if (rtnl_fill_link_af(skb, dev, ext_filter_mask)) 1809 goto nla_put_failure_rcu; 1810 rcu_read_unlock(); 1811 1812 if (rtnl_fill_prop_list(skb, dev)) 1813 goto nla_put_failure; 1814 1815 if (dev->dev.parent && 1816 nla_put_string(skb, IFLA_PARENT_DEV_NAME, 1817 dev_name(dev->dev.parent))) 1818 goto nla_put_failure; 1819 1820 if (dev->dev.parent && dev->dev.parent->bus && 1821 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME, 1822 dev->dev.parent->bus->name)) 1823 goto nla_put_failure; 1824 1825 nlmsg_end(skb, nlh); 1826 return 0; 1827 1828 nla_put_failure_rcu: 1829 rcu_read_unlock(); 1830 nla_put_failure: 1831 nlmsg_cancel(skb, nlh); 1832 return -EMSGSIZE; 1833 } 1834 1835 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1836 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1837 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1838 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1839 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1840 [IFLA_MTU] = { .type = NLA_U32 }, 1841 [IFLA_LINK] = { .type = NLA_U32 }, 1842 [IFLA_MASTER] = { .type = NLA_U32 }, 1843 [IFLA_CARRIER] = { .type = NLA_U8 }, 1844 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1845 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1846 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1847 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1848 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1849 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1850 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1851 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to 1852 * allow 0-length string (needed to remove an alias). 1853 */ 1854 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 }, 1855 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1856 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1857 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1858 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1859 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1860 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1861 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1862 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1863 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 }, 1864 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 }, 1865 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1866 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1867 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1868 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1869 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1870 [IFLA_XDP] = { .type = NLA_NESTED }, 1871 [IFLA_EVENT] = { .type = NLA_U32 }, 1872 [IFLA_GROUP] = { .type = NLA_U32 }, 1873 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 }, 1874 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 }, 1875 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 }, 1876 [IFLA_MIN_MTU] = { .type = NLA_U32 }, 1877 [IFLA_MAX_MTU] = { .type = NLA_U32 }, 1878 [IFLA_PROP_LIST] = { .type = NLA_NESTED }, 1879 [IFLA_ALT_IFNAME] = { .type = NLA_STRING, 1880 .len = ALTIFNAMSIZ - 1 }, 1881 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT }, 1882 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED }, 1883 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1), 1884 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING }, 1885 }; 1886 1887 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1888 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1889 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1890 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1891 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1892 }; 1893 1894 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1895 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1896 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT }, 1897 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1898 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1899 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1900 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1901 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1902 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1903 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1904 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1905 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1906 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1907 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1908 }; 1909 1910 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1911 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1912 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1913 .len = PORT_PROFILE_MAX }, 1914 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1915 .len = PORT_UUID_MAX }, 1916 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1917 .len = PORT_UUID_MAX }, 1918 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1919 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1920 1921 /* Unused, but we need to keep it here since user space could 1922 * fill it. It's also broken with regard to NLA_BINARY use in 1923 * combination with structs. 1924 */ 1925 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1926 .len = sizeof(struct ifla_port_vsi) }, 1927 }; 1928 1929 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1930 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD }, 1931 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1932 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 }, 1933 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1934 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1935 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 }, 1936 }; 1937 1938 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1939 { 1940 const struct rtnl_link_ops *ops = NULL; 1941 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1942 1943 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0) 1944 return NULL; 1945 1946 if (linfo[IFLA_INFO_KIND]) { 1947 char kind[MODULE_NAME_LEN]; 1948 1949 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1950 ops = rtnl_link_ops_get(kind); 1951 } 1952 1953 return ops; 1954 } 1955 1956 static bool link_master_filtered(struct net_device *dev, int master_idx) 1957 { 1958 struct net_device *master; 1959 1960 if (!master_idx) 1961 return false; 1962 1963 master = netdev_master_upper_dev_get(dev); 1964 1965 /* 0 is already used to denote IFLA_MASTER wasn't passed, therefore need 1966 * another invalid value for ifindex to denote "no master". 1967 */ 1968 if (master_idx == -1) 1969 return !!master; 1970 1971 if (!master || master->ifindex != master_idx) 1972 return true; 1973 1974 return false; 1975 } 1976 1977 static bool link_kind_filtered(const struct net_device *dev, 1978 const struct rtnl_link_ops *kind_ops) 1979 { 1980 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1981 return true; 1982 1983 return false; 1984 } 1985 1986 static bool link_dump_filtered(struct net_device *dev, 1987 int master_idx, 1988 const struct rtnl_link_ops *kind_ops) 1989 { 1990 if (link_master_filtered(dev, master_idx) || 1991 link_kind_filtered(dev, kind_ops)) 1992 return true; 1993 1994 return false; 1995 } 1996 1997 /** 1998 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged. 1999 * @sk: netlink socket 2000 * @netnsid: network namespace identifier 2001 * 2002 * Returns the network namespace identified by netnsid on success or an error 2003 * pointer on failure. 2004 */ 2005 struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid) 2006 { 2007 struct net *net; 2008 2009 net = get_net_ns_by_id(sock_net(sk), netnsid); 2010 if (!net) 2011 return ERR_PTR(-EINVAL); 2012 2013 /* For now, the caller is required to have CAP_NET_ADMIN in 2014 * the user namespace owning the target net ns. 2015 */ 2016 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) { 2017 put_net(net); 2018 return ERR_PTR(-EACCES); 2019 } 2020 return net; 2021 } 2022 EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable); 2023 2024 static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh, 2025 bool strict_check, struct nlattr **tb, 2026 struct netlink_ext_ack *extack) 2027 { 2028 int hdrlen; 2029 2030 if (strict_check) { 2031 struct ifinfomsg *ifm; 2032 2033 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 2034 NL_SET_ERR_MSG(extack, "Invalid header for link dump"); 2035 return -EINVAL; 2036 } 2037 2038 ifm = nlmsg_data(nlh); 2039 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 2040 ifm->ifi_change) { 2041 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request"); 2042 return -EINVAL; 2043 } 2044 if (ifm->ifi_index) { 2045 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps"); 2046 return -EINVAL; 2047 } 2048 2049 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, 2050 IFLA_MAX, ifla_policy, 2051 extack); 2052 } 2053 2054 /* A hack to preserve kernel<->userspace interface. 2055 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 2056 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 2057 * what iproute2 < v3.9.0 used. 2058 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 2059 * attribute, its netlink message is shorter than struct ifinfomsg. 2060 */ 2061 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2062 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2063 2064 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, 2065 extack); 2066 } 2067 2068 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 2069 { 2070 struct netlink_ext_ack *extack = cb->extack; 2071 const struct nlmsghdr *nlh = cb->nlh; 2072 struct net *net = sock_net(skb->sk); 2073 struct net *tgt_net = net; 2074 int h, s_h; 2075 int idx = 0, s_idx; 2076 struct net_device *dev; 2077 struct hlist_head *head; 2078 struct nlattr *tb[IFLA_MAX+1]; 2079 u32 ext_filter_mask = 0; 2080 const struct rtnl_link_ops *kind_ops = NULL; 2081 unsigned int flags = NLM_F_MULTI; 2082 int master_idx = 0; 2083 int netnsid = -1; 2084 int err, i; 2085 2086 s_h = cb->args[0]; 2087 s_idx = cb->args[1]; 2088 2089 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack); 2090 if (err < 0) { 2091 if (cb->strict_check) 2092 return err; 2093 2094 goto walk_entries; 2095 } 2096 2097 for (i = 0; i <= IFLA_MAX; ++i) { 2098 if (!tb[i]) 2099 continue; 2100 2101 /* new attributes should only be added with strict checking */ 2102 switch (i) { 2103 case IFLA_TARGET_NETNSID: 2104 netnsid = nla_get_s32(tb[i]); 2105 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid); 2106 if (IS_ERR(tgt_net)) { 2107 NL_SET_ERR_MSG(extack, "Invalid target network namespace id"); 2108 return PTR_ERR(tgt_net); 2109 } 2110 break; 2111 case IFLA_EXT_MASK: 2112 ext_filter_mask = nla_get_u32(tb[i]); 2113 break; 2114 case IFLA_MASTER: 2115 master_idx = nla_get_u32(tb[i]); 2116 break; 2117 case IFLA_LINKINFO: 2118 kind_ops = linkinfo_to_kind_ops(tb[i]); 2119 break; 2120 default: 2121 if (cb->strict_check) { 2122 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request"); 2123 return -EINVAL; 2124 } 2125 } 2126 } 2127 2128 if (master_idx || kind_ops) 2129 flags |= NLM_F_DUMP_FILTERED; 2130 2131 walk_entries: 2132 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 2133 idx = 0; 2134 head = &tgt_net->dev_index_head[h]; 2135 hlist_for_each_entry(dev, head, index_hlist) { 2136 if (link_dump_filtered(dev, master_idx, kind_ops)) 2137 goto cont; 2138 if (idx < s_idx) 2139 goto cont; 2140 err = rtnl_fill_ifinfo(skb, dev, net, 2141 RTM_NEWLINK, 2142 NETLINK_CB(cb->skb).portid, 2143 nlh->nlmsg_seq, 0, flags, 2144 ext_filter_mask, 0, NULL, 0, 2145 netnsid, GFP_KERNEL); 2146 2147 if (err < 0) { 2148 if (likely(skb->len)) 2149 goto out; 2150 2151 goto out_err; 2152 } 2153 cont: 2154 idx++; 2155 } 2156 } 2157 out: 2158 err = skb->len; 2159 out_err: 2160 cb->args[1] = idx; 2161 cb->args[0] = h; 2162 cb->seq = tgt_net->dev_base_seq; 2163 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 2164 if (netnsid >= 0) 2165 put_net(tgt_net); 2166 2167 return err; 2168 } 2169 2170 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 2171 struct netlink_ext_ack *exterr) 2172 { 2173 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy, 2174 exterr); 2175 } 2176 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 2177 2178 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 2179 { 2180 struct net *net; 2181 /* Examine the link attributes and figure out which 2182 * network namespace we are talking about. 2183 */ 2184 if (tb[IFLA_NET_NS_PID]) 2185 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 2186 else if (tb[IFLA_NET_NS_FD]) 2187 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 2188 else 2189 net = get_net(src_net); 2190 return net; 2191 } 2192 EXPORT_SYMBOL(rtnl_link_get_net); 2193 2194 /* Figure out which network namespace we are talking about by 2195 * examining the link attributes in the following order: 2196 * 2197 * 1. IFLA_NET_NS_PID 2198 * 2. IFLA_NET_NS_FD 2199 * 3. IFLA_TARGET_NETNSID 2200 */ 2201 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net, 2202 struct nlattr *tb[]) 2203 { 2204 struct net *net; 2205 2206 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) 2207 return rtnl_link_get_net(src_net, tb); 2208 2209 if (!tb[IFLA_TARGET_NETNSID]) 2210 return get_net(src_net); 2211 2212 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID])); 2213 if (!net) 2214 return ERR_PTR(-EINVAL); 2215 2216 return net; 2217 } 2218 2219 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb, 2220 struct net *src_net, 2221 struct nlattr *tb[], int cap) 2222 { 2223 struct net *net; 2224 2225 net = rtnl_link_get_net_by_nlattr(src_net, tb); 2226 if (IS_ERR(net)) 2227 return net; 2228 2229 if (!netlink_ns_capable(skb, net->user_ns, cap)) { 2230 put_net(net); 2231 return ERR_PTR(-EPERM); 2232 } 2233 2234 return net; 2235 } 2236 2237 /* Verify that rtnetlink requests do not pass additional properties 2238 * potentially referring to different network namespaces. 2239 */ 2240 static int rtnl_ensure_unique_netns(struct nlattr *tb[], 2241 struct netlink_ext_ack *extack, 2242 bool netns_id_only) 2243 { 2244 2245 if (netns_id_only) { 2246 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD]) 2247 return 0; 2248 2249 NL_SET_ERR_MSG(extack, "specified netns attribute not supported"); 2250 return -EOPNOTSUPP; 2251 } 2252 2253 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])) 2254 goto invalid_attr; 2255 2256 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD])) 2257 goto invalid_attr; 2258 2259 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID])) 2260 goto invalid_attr; 2261 2262 return 0; 2263 2264 invalid_attr: 2265 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified"); 2266 return -EINVAL; 2267 } 2268 2269 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[], 2270 struct netlink_ext_ack *extack) 2271 { 2272 if (dev) { 2273 if (tb[IFLA_ADDRESS] && 2274 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 2275 return -EINVAL; 2276 2277 if (tb[IFLA_BROADCAST] && 2278 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 2279 return -EINVAL; 2280 } 2281 2282 if (tb[IFLA_AF_SPEC]) { 2283 struct nlattr *af; 2284 int rem, err; 2285 2286 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2287 const struct rtnl_af_ops *af_ops; 2288 2289 af_ops = rtnl_af_lookup(nla_type(af)); 2290 if (!af_ops) 2291 return -EAFNOSUPPORT; 2292 2293 if (!af_ops->set_link_af) 2294 return -EOPNOTSUPP; 2295 2296 if (af_ops->validate_link_af) { 2297 err = af_ops->validate_link_af(dev, af, extack); 2298 if (err < 0) 2299 return err; 2300 } 2301 } 2302 } 2303 2304 return 0; 2305 } 2306 2307 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 2308 int guid_type) 2309 { 2310 const struct net_device_ops *ops = dev->netdev_ops; 2311 2312 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 2313 } 2314 2315 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 2316 { 2317 if (dev->type != ARPHRD_INFINIBAND) 2318 return -EOPNOTSUPP; 2319 2320 return handle_infiniband_guid(dev, ivt, guid_type); 2321 } 2322 2323 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 2324 { 2325 const struct net_device_ops *ops = dev->netdev_ops; 2326 int err = -EINVAL; 2327 2328 if (tb[IFLA_VF_MAC]) { 2329 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 2330 2331 if (ivm->vf >= INT_MAX) 2332 return -EINVAL; 2333 err = -EOPNOTSUPP; 2334 if (ops->ndo_set_vf_mac) 2335 err = ops->ndo_set_vf_mac(dev, ivm->vf, 2336 ivm->mac); 2337 if (err < 0) 2338 return err; 2339 } 2340 2341 if (tb[IFLA_VF_VLAN]) { 2342 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 2343 2344 if (ivv->vf >= INT_MAX) 2345 return -EINVAL; 2346 err = -EOPNOTSUPP; 2347 if (ops->ndo_set_vf_vlan) 2348 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 2349 ivv->qos, 2350 htons(ETH_P_8021Q)); 2351 if (err < 0) 2352 return err; 2353 } 2354 2355 if (tb[IFLA_VF_VLAN_LIST]) { 2356 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 2357 struct nlattr *attr; 2358 int rem, len = 0; 2359 2360 err = -EOPNOTSUPP; 2361 if (!ops->ndo_set_vf_vlan) 2362 return err; 2363 2364 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 2365 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 2366 nla_len(attr) < NLA_HDRLEN) { 2367 return -EINVAL; 2368 } 2369 if (len >= MAX_VLAN_LIST_LEN) 2370 return -EOPNOTSUPP; 2371 ivvl[len] = nla_data(attr); 2372 2373 len++; 2374 } 2375 if (len == 0) 2376 return -EINVAL; 2377 2378 if (ivvl[0]->vf >= INT_MAX) 2379 return -EINVAL; 2380 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 2381 ivvl[0]->qos, ivvl[0]->vlan_proto); 2382 if (err < 0) 2383 return err; 2384 } 2385 2386 if (tb[IFLA_VF_TX_RATE]) { 2387 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 2388 struct ifla_vf_info ivf; 2389 2390 if (ivt->vf >= INT_MAX) 2391 return -EINVAL; 2392 err = -EOPNOTSUPP; 2393 if (ops->ndo_get_vf_config) 2394 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 2395 if (err < 0) 2396 return err; 2397 2398 err = -EOPNOTSUPP; 2399 if (ops->ndo_set_vf_rate) 2400 err = ops->ndo_set_vf_rate(dev, ivt->vf, 2401 ivf.min_tx_rate, 2402 ivt->rate); 2403 if (err < 0) 2404 return err; 2405 } 2406 2407 if (tb[IFLA_VF_RATE]) { 2408 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 2409 2410 if (ivt->vf >= INT_MAX) 2411 return -EINVAL; 2412 err = -EOPNOTSUPP; 2413 if (ops->ndo_set_vf_rate) 2414 err = ops->ndo_set_vf_rate(dev, ivt->vf, 2415 ivt->min_tx_rate, 2416 ivt->max_tx_rate); 2417 if (err < 0) 2418 return err; 2419 } 2420 2421 if (tb[IFLA_VF_SPOOFCHK]) { 2422 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 2423 2424 if (ivs->vf >= INT_MAX) 2425 return -EINVAL; 2426 err = -EOPNOTSUPP; 2427 if (ops->ndo_set_vf_spoofchk) 2428 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 2429 ivs->setting); 2430 if (err < 0) 2431 return err; 2432 } 2433 2434 if (tb[IFLA_VF_LINK_STATE]) { 2435 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 2436 2437 if (ivl->vf >= INT_MAX) 2438 return -EINVAL; 2439 err = -EOPNOTSUPP; 2440 if (ops->ndo_set_vf_link_state) 2441 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 2442 ivl->link_state); 2443 if (err < 0) 2444 return err; 2445 } 2446 2447 if (tb[IFLA_VF_RSS_QUERY_EN]) { 2448 struct ifla_vf_rss_query_en *ivrssq_en; 2449 2450 err = -EOPNOTSUPP; 2451 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 2452 if (ivrssq_en->vf >= INT_MAX) 2453 return -EINVAL; 2454 if (ops->ndo_set_vf_rss_query_en) 2455 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 2456 ivrssq_en->setting); 2457 if (err < 0) 2458 return err; 2459 } 2460 2461 if (tb[IFLA_VF_TRUST]) { 2462 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 2463 2464 if (ivt->vf >= INT_MAX) 2465 return -EINVAL; 2466 err = -EOPNOTSUPP; 2467 if (ops->ndo_set_vf_trust) 2468 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 2469 if (err < 0) 2470 return err; 2471 } 2472 2473 if (tb[IFLA_VF_IB_NODE_GUID]) { 2474 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 2475 2476 if (ivt->vf >= INT_MAX) 2477 return -EINVAL; 2478 if (!ops->ndo_set_vf_guid) 2479 return -EOPNOTSUPP; 2480 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 2481 } 2482 2483 if (tb[IFLA_VF_IB_PORT_GUID]) { 2484 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 2485 2486 if (ivt->vf >= INT_MAX) 2487 return -EINVAL; 2488 if (!ops->ndo_set_vf_guid) 2489 return -EOPNOTSUPP; 2490 2491 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 2492 } 2493 2494 return err; 2495 } 2496 2497 static int do_set_master(struct net_device *dev, int ifindex, 2498 struct netlink_ext_ack *extack) 2499 { 2500 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 2501 const struct net_device_ops *ops; 2502 int err; 2503 2504 if (upper_dev) { 2505 if (upper_dev->ifindex == ifindex) 2506 return 0; 2507 ops = upper_dev->netdev_ops; 2508 if (ops->ndo_del_slave) { 2509 err = ops->ndo_del_slave(upper_dev, dev); 2510 if (err) 2511 return err; 2512 } else { 2513 return -EOPNOTSUPP; 2514 } 2515 } 2516 2517 if (ifindex) { 2518 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 2519 if (!upper_dev) 2520 return -EINVAL; 2521 ops = upper_dev->netdev_ops; 2522 if (ops->ndo_add_slave) { 2523 err = ops->ndo_add_slave(upper_dev, dev, extack); 2524 if (err) 2525 return err; 2526 } else { 2527 return -EOPNOTSUPP; 2528 } 2529 } 2530 return 0; 2531 } 2532 2533 static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = { 2534 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 }, 2535 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 }, 2536 }; 2537 2538 static int do_set_proto_down(struct net_device *dev, 2539 struct nlattr *nl_proto_down, 2540 struct nlattr *nl_proto_down_reason, 2541 struct netlink_ext_ack *extack) 2542 { 2543 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1]; 2544 const struct net_device_ops *ops = dev->netdev_ops; 2545 unsigned long mask = 0; 2546 u32 value; 2547 bool proto_down; 2548 int err; 2549 2550 if (!ops->ndo_change_proto_down) { 2551 NL_SET_ERR_MSG(extack, "Protodown not supported by device"); 2552 return -EOPNOTSUPP; 2553 } 2554 2555 if (nl_proto_down_reason) { 2556 err = nla_parse_nested_deprecated(pdreason, 2557 IFLA_PROTO_DOWN_REASON_MAX, 2558 nl_proto_down_reason, 2559 ifla_proto_down_reason_policy, 2560 NULL); 2561 if (err < 0) 2562 return err; 2563 2564 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) { 2565 NL_SET_ERR_MSG(extack, "Invalid protodown reason value"); 2566 return -EINVAL; 2567 } 2568 2569 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]); 2570 2571 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK]) 2572 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]); 2573 2574 dev_change_proto_down_reason(dev, mask, value); 2575 } 2576 2577 if (nl_proto_down) { 2578 proto_down = nla_get_u8(nl_proto_down); 2579 2580 /* Don't turn off protodown if there are active reasons */ 2581 if (!proto_down && dev->proto_down_reason) { 2582 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons"); 2583 return -EBUSY; 2584 } 2585 err = dev_change_proto_down(dev, 2586 proto_down); 2587 if (err) 2588 return err; 2589 } 2590 2591 return 0; 2592 } 2593 2594 #define DO_SETLINK_MODIFIED 0x01 2595 /* notify flag means notify + modified. */ 2596 #define DO_SETLINK_NOTIFY 0x03 2597 static int do_setlink(const struct sk_buff *skb, 2598 struct net_device *dev, struct ifinfomsg *ifm, 2599 struct netlink_ext_ack *extack, 2600 struct nlattr **tb, char *ifname, int status) 2601 { 2602 const struct net_device_ops *ops = dev->netdev_ops; 2603 int err; 2604 2605 err = validate_linkmsg(dev, tb, extack); 2606 if (err < 0) 2607 return err; 2608 2609 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) { 2610 const char *pat = ifname && ifname[0] ? ifname : NULL; 2611 struct net *net; 2612 int new_ifindex; 2613 2614 net = rtnl_link_get_net_capable(skb, dev_net(dev), 2615 tb, CAP_NET_ADMIN); 2616 if (IS_ERR(net)) { 2617 err = PTR_ERR(net); 2618 goto errout; 2619 } 2620 2621 if (tb[IFLA_NEW_IFINDEX]) 2622 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]); 2623 else 2624 new_ifindex = 0; 2625 2626 err = __dev_change_net_namespace(dev, net, pat, new_ifindex); 2627 put_net(net); 2628 if (err) 2629 goto errout; 2630 status |= DO_SETLINK_MODIFIED; 2631 } 2632 2633 if (tb[IFLA_MAP]) { 2634 struct rtnl_link_ifmap *u_map; 2635 struct ifmap k_map; 2636 2637 if (!ops->ndo_set_config) { 2638 err = -EOPNOTSUPP; 2639 goto errout; 2640 } 2641 2642 if (!netif_device_present(dev)) { 2643 err = -ENODEV; 2644 goto errout; 2645 } 2646 2647 u_map = nla_data(tb[IFLA_MAP]); 2648 k_map.mem_start = (unsigned long) u_map->mem_start; 2649 k_map.mem_end = (unsigned long) u_map->mem_end; 2650 k_map.base_addr = (unsigned short) u_map->base_addr; 2651 k_map.irq = (unsigned char) u_map->irq; 2652 k_map.dma = (unsigned char) u_map->dma; 2653 k_map.port = (unsigned char) u_map->port; 2654 2655 err = ops->ndo_set_config(dev, &k_map); 2656 if (err < 0) 2657 goto errout; 2658 2659 status |= DO_SETLINK_NOTIFY; 2660 } 2661 2662 if (tb[IFLA_ADDRESS]) { 2663 struct sockaddr *sa; 2664 int len; 2665 2666 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len, 2667 sizeof(*sa)); 2668 sa = kmalloc(len, GFP_KERNEL); 2669 if (!sa) { 2670 err = -ENOMEM; 2671 goto errout; 2672 } 2673 sa->sa_family = dev->type; 2674 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 2675 dev->addr_len); 2676 err = dev_set_mac_address_user(dev, sa, extack); 2677 kfree(sa); 2678 if (err) 2679 goto errout; 2680 status |= DO_SETLINK_MODIFIED; 2681 } 2682 2683 if (tb[IFLA_MTU]) { 2684 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack); 2685 if (err < 0) 2686 goto errout; 2687 status |= DO_SETLINK_MODIFIED; 2688 } 2689 2690 if (tb[IFLA_GROUP]) { 2691 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2692 status |= DO_SETLINK_NOTIFY; 2693 } 2694 2695 /* 2696 * Interface selected by interface index but interface 2697 * name provided implies that a name change has been 2698 * requested. 2699 */ 2700 if (ifm->ifi_index > 0 && ifname[0]) { 2701 err = dev_change_name(dev, ifname); 2702 if (err < 0) 2703 goto errout; 2704 status |= DO_SETLINK_MODIFIED; 2705 } 2706 2707 if (tb[IFLA_IFALIAS]) { 2708 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2709 nla_len(tb[IFLA_IFALIAS])); 2710 if (err < 0) 2711 goto errout; 2712 status |= DO_SETLINK_NOTIFY; 2713 } 2714 2715 if (tb[IFLA_BROADCAST]) { 2716 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2717 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2718 } 2719 2720 if (ifm->ifi_flags || ifm->ifi_change) { 2721 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), 2722 extack); 2723 if (err < 0) 2724 goto errout; 2725 } 2726 2727 if (tb[IFLA_MASTER]) { 2728 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 2729 if (err) 2730 goto errout; 2731 status |= DO_SETLINK_MODIFIED; 2732 } 2733 2734 if (tb[IFLA_CARRIER]) { 2735 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2736 if (err) 2737 goto errout; 2738 status |= DO_SETLINK_MODIFIED; 2739 } 2740 2741 if (tb[IFLA_TXQLEN]) { 2742 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]); 2743 2744 err = dev_change_tx_queue_len(dev, value); 2745 if (err) 2746 goto errout; 2747 status |= DO_SETLINK_MODIFIED; 2748 } 2749 2750 if (tb[IFLA_GSO_MAX_SIZE]) { 2751 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]); 2752 2753 if (max_size > GSO_MAX_SIZE) { 2754 err = -EINVAL; 2755 goto errout; 2756 } 2757 2758 if (dev->gso_max_size ^ max_size) { 2759 netif_set_gso_max_size(dev, max_size); 2760 status |= DO_SETLINK_MODIFIED; 2761 } 2762 } 2763 2764 if (tb[IFLA_GSO_MAX_SEGS]) { 2765 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); 2766 2767 if (max_segs > GSO_MAX_SEGS) { 2768 err = -EINVAL; 2769 goto errout; 2770 } 2771 2772 if (dev->gso_max_segs ^ max_segs) { 2773 dev->gso_max_segs = max_segs; 2774 status |= DO_SETLINK_MODIFIED; 2775 } 2776 } 2777 2778 if (tb[IFLA_OPERSTATE]) 2779 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2780 2781 if (tb[IFLA_LINKMODE]) { 2782 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2783 2784 write_lock(&dev_base_lock); 2785 if (dev->link_mode ^ value) 2786 status |= DO_SETLINK_NOTIFY; 2787 dev->link_mode = value; 2788 write_unlock(&dev_base_lock); 2789 } 2790 2791 if (tb[IFLA_VFINFO_LIST]) { 2792 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2793 struct nlattr *attr; 2794 int rem; 2795 2796 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2797 if (nla_type(attr) != IFLA_VF_INFO || 2798 nla_len(attr) < NLA_HDRLEN) { 2799 err = -EINVAL; 2800 goto errout; 2801 } 2802 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX, 2803 attr, 2804 ifla_vf_policy, 2805 NULL); 2806 if (err < 0) 2807 goto errout; 2808 err = do_setvfinfo(dev, vfinfo); 2809 if (err < 0) 2810 goto errout; 2811 status |= DO_SETLINK_NOTIFY; 2812 } 2813 } 2814 err = 0; 2815 2816 if (tb[IFLA_VF_PORTS]) { 2817 struct nlattr *port[IFLA_PORT_MAX+1]; 2818 struct nlattr *attr; 2819 int vf; 2820 int rem; 2821 2822 err = -EOPNOTSUPP; 2823 if (!ops->ndo_set_vf_port) 2824 goto errout; 2825 2826 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2827 if (nla_type(attr) != IFLA_VF_PORT || 2828 nla_len(attr) < NLA_HDRLEN) { 2829 err = -EINVAL; 2830 goto errout; 2831 } 2832 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, 2833 attr, 2834 ifla_port_policy, 2835 NULL); 2836 if (err < 0) 2837 goto errout; 2838 if (!port[IFLA_PORT_VF]) { 2839 err = -EOPNOTSUPP; 2840 goto errout; 2841 } 2842 vf = nla_get_u32(port[IFLA_PORT_VF]); 2843 err = ops->ndo_set_vf_port(dev, vf, port); 2844 if (err < 0) 2845 goto errout; 2846 status |= DO_SETLINK_NOTIFY; 2847 } 2848 } 2849 err = 0; 2850 2851 if (tb[IFLA_PORT_SELF]) { 2852 struct nlattr *port[IFLA_PORT_MAX+1]; 2853 2854 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, 2855 tb[IFLA_PORT_SELF], 2856 ifla_port_policy, NULL); 2857 if (err < 0) 2858 goto errout; 2859 2860 err = -EOPNOTSUPP; 2861 if (ops->ndo_set_vf_port) 2862 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2863 if (err < 0) 2864 goto errout; 2865 status |= DO_SETLINK_NOTIFY; 2866 } 2867 2868 if (tb[IFLA_AF_SPEC]) { 2869 struct nlattr *af; 2870 int rem; 2871 2872 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2873 const struct rtnl_af_ops *af_ops; 2874 2875 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af)))); 2876 2877 err = af_ops->set_link_af(dev, af, extack); 2878 if (err < 0) 2879 goto errout; 2880 2881 status |= DO_SETLINK_NOTIFY; 2882 } 2883 } 2884 err = 0; 2885 2886 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) { 2887 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN], 2888 tb[IFLA_PROTO_DOWN_REASON], extack); 2889 if (err) 2890 goto errout; 2891 status |= DO_SETLINK_NOTIFY; 2892 } 2893 2894 if (tb[IFLA_XDP]) { 2895 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2896 u32 xdp_flags = 0; 2897 2898 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX, 2899 tb[IFLA_XDP], 2900 ifla_xdp_policy, NULL); 2901 if (err < 0) 2902 goto errout; 2903 2904 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) { 2905 err = -EINVAL; 2906 goto errout; 2907 } 2908 2909 if (xdp[IFLA_XDP_FLAGS]) { 2910 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2911 if (xdp_flags & ~XDP_FLAGS_MASK) { 2912 err = -EINVAL; 2913 goto errout; 2914 } 2915 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) { 2916 err = -EINVAL; 2917 goto errout; 2918 } 2919 } 2920 2921 if (xdp[IFLA_XDP_FD]) { 2922 int expected_fd = -1; 2923 2924 if (xdp_flags & XDP_FLAGS_REPLACE) { 2925 if (!xdp[IFLA_XDP_EXPECTED_FD]) { 2926 err = -EINVAL; 2927 goto errout; 2928 } 2929 expected_fd = 2930 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]); 2931 } 2932 2933 err = dev_change_xdp_fd(dev, extack, 2934 nla_get_s32(xdp[IFLA_XDP_FD]), 2935 expected_fd, 2936 xdp_flags); 2937 if (err) 2938 goto errout; 2939 status |= DO_SETLINK_NOTIFY; 2940 } 2941 } 2942 2943 errout: 2944 if (status & DO_SETLINK_MODIFIED) { 2945 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY) 2946 netdev_state_change(dev); 2947 2948 if (err < 0) 2949 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", 2950 dev->name); 2951 } 2952 2953 return err; 2954 } 2955 2956 static struct net_device *rtnl_dev_get(struct net *net, 2957 struct nlattr *ifname_attr, 2958 struct nlattr *altifname_attr, 2959 char *ifname) 2960 { 2961 char buffer[ALTIFNAMSIZ]; 2962 2963 if (!ifname) { 2964 ifname = buffer; 2965 if (ifname_attr) 2966 nla_strscpy(ifname, ifname_attr, IFNAMSIZ); 2967 else if (altifname_attr) 2968 nla_strscpy(ifname, altifname_attr, ALTIFNAMSIZ); 2969 else 2970 return NULL; 2971 } 2972 2973 return __dev_get_by_name(net, ifname); 2974 } 2975 2976 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2977 struct netlink_ext_ack *extack) 2978 { 2979 struct net *net = sock_net(skb->sk); 2980 struct ifinfomsg *ifm; 2981 struct net_device *dev; 2982 int err; 2983 struct nlattr *tb[IFLA_MAX+1]; 2984 char ifname[IFNAMSIZ]; 2985 2986 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 2987 ifla_policy, extack); 2988 if (err < 0) 2989 goto errout; 2990 2991 err = rtnl_ensure_unique_netns(tb, extack, false); 2992 if (err < 0) 2993 goto errout; 2994 2995 if (tb[IFLA_IFNAME]) 2996 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2997 else 2998 ifname[0] = '\0'; 2999 3000 err = -EINVAL; 3001 ifm = nlmsg_data(nlh); 3002 if (ifm->ifi_index > 0) 3003 dev = __dev_get_by_index(net, ifm->ifi_index); 3004 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3005 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); 3006 else 3007 goto errout; 3008 3009 if (dev == NULL) { 3010 err = -ENODEV; 3011 goto errout; 3012 } 3013 3014 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0); 3015 errout: 3016 return err; 3017 } 3018 3019 static int rtnl_group_dellink(const struct net *net, int group) 3020 { 3021 struct net_device *dev, *aux; 3022 LIST_HEAD(list_kill); 3023 bool found = false; 3024 3025 if (!group) 3026 return -EPERM; 3027 3028 for_each_netdev(net, dev) { 3029 if (dev->group == group) { 3030 const struct rtnl_link_ops *ops; 3031 3032 found = true; 3033 ops = dev->rtnl_link_ops; 3034 if (!ops || !ops->dellink) 3035 return -EOPNOTSUPP; 3036 } 3037 } 3038 3039 if (!found) 3040 return -ENODEV; 3041 3042 for_each_netdev_safe(net, dev, aux) { 3043 if (dev->group == group) { 3044 const struct rtnl_link_ops *ops; 3045 3046 ops = dev->rtnl_link_ops; 3047 ops->dellink(dev, &list_kill); 3048 } 3049 } 3050 unregister_netdevice_many(&list_kill); 3051 3052 return 0; 3053 } 3054 3055 int rtnl_delete_link(struct net_device *dev) 3056 { 3057 const struct rtnl_link_ops *ops; 3058 LIST_HEAD(list_kill); 3059 3060 ops = dev->rtnl_link_ops; 3061 if (!ops || !ops->dellink) 3062 return -EOPNOTSUPP; 3063 3064 ops->dellink(dev, &list_kill); 3065 unregister_netdevice_many(&list_kill); 3066 3067 return 0; 3068 } 3069 EXPORT_SYMBOL_GPL(rtnl_delete_link); 3070 3071 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 3072 struct netlink_ext_ack *extack) 3073 { 3074 struct net *net = sock_net(skb->sk); 3075 struct net *tgt_net = net; 3076 struct net_device *dev = NULL; 3077 struct ifinfomsg *ifm; 3078 struct nlattr *tb[IFLA_MAX+1]; 3079 int err; 3080 int netnsid = -1; 3081 3082 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3083 ifla_policy, extack); 3084 if (err < 0) 3085 return err; 3086 3087 err = rtnl_ensure_unique_netns(tb, extack, true); 3088 if (err < 0) 3089 return err; 3090 3091 if (tb[IFLA_TARGET_NETNSID]) { 3092 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); 3093 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); 3094 if (IS_ERR(tgt_net)) 3095 return PTR_ERR(tgt_net); 3096 } 3097 3098 err = -EINVAL; 3099 ifm = nlmsg_data(nlh); 3100 if (ifm->ifi_index > 0) 3101 dev = __dev_get_by_index(tgt_net, ifm->ifi_index); 3102 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3103 dev = rtnl_dev_get(net, tb[IFLA_IFNAME], 3104 tb[IFLA_ALT_IFNAME], NULL); 3105 else if (tb[IFLA_GROUP]) 3106 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP])); 3107 else 3108 goto out; 3109 3110 if (!dev) { 3111 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0) 3112 err = -ENODEV; 3113 3114 goto out; 3115 } 3116 3117 err = rtnl_delete_link(dev); 3118 3119 out: 3120 if (netnsid >= 0) 3121 put_net(tgt_net); 3122 3123 return err; 3124 } 3125 3126 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 3127 { 3128 unsigned int old_flags; 3129 int err; 3130 3131 old_flags = dev->flags; 3132 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 3133 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), 3134 NULL); 3135 if (err < 0) 3136 return err; 3137 } 3138 3139 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) { 3140 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags)); 3141 } else { 3142 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 3143 __dev_notify_flags(dev, old_flags, ~0U); 3144 } 3145 return 0; 3146 } 3147 EXPORT_SYMBOL(rtnl_configure_link); 3148 3149 struct net_device *rtnl_create_link(struct net *net, const char *ifname, 3150 unsigned char name_assign_type, 3151 const struct rtnl_link_ops *ops, 3152 struct nlattr *tb[], 3153 struct netlink_ext_ack *extack) 3154 { 3155 struct net_device *dev; 3156 unsigned int num_tx_queues = 1; 3157 unsigned int num_rx_queues = 1; 3158 3159 if (tb[IFLA_NUM_TX_QUEUES]) 3160 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 3161 else if (ops->get_num_tx_queues) 3162 num_tx_queues = ops->get_num_tx_queues(); 3163 3164 if (tb[IFLA_NUM_RX_QUEUES]) 3165 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 3166 else if (ops->get_num_rx_queues) 3167 num_rx_queues = ops->get_num_rx_queues(); 3168 3169 if (num_tx_queues < 1 || num_tx_queues > 4096) { 3170 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues"); 3171 return ERR_PTR(-EINVAL); 3172 } 3173 3174 if (num_rx_queues < 1 || num_rx_queues > 4096) { 3175 NL_SET_ERR_MSG(extack, "Invalid number of receive queues"); 3176 return ERR_PTR(-EINVAL); 3177 } 3178 3179 if (ops->alloc) { 3180 dev = ops->alloc(tb, ifname, name_assign_type, 3181 num_tx_queues, num_rx_queues); 3182 if (IS_ERR(dev)) 3183 return dev; 3184 } else { 3185 dev = alloc_netdev_mqs(ops->priv_size, ifname, 3186 name_assign_type, ops->setup, 3187 num_tx_queues, num_rx_queues); 3188 } 3189 3190 if (!dev) 3191 return ERR_PTR(-ENOMEM); 3192 3193 dev_net_set(dev, net); 3194 dev->rtnl_link_ops = ops; 3195 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 3196 3197 if (tb[IFLA_MTU]) { 3198 u32 mtu = nla_get_u32(tb[IFLA_MTU]); 3199 int err; 3200 3201 err = dev_validate_mtu(dev, mtu, extack); 3202 if (err) { 3203 free_netdev(dev); 3204 return ERR_PTR(err); 3205 } 3206 dev->mtu = mtu; 3207 } 3208 if (tb[IFLA_ADDRESS]) { 3209 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 3210 nla_len(tb[IFLA_ADDRESS])); 3211 dev->addr_assign_type = NET_ADDR_SET; 3212 } 3213 if (tb[IFLA_BROADCAST]) 3214 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 3215 nla_len(tb[IFLA_BROADCAST])); 3216 if (tb[IFLA_TXQLEN]) 3217 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 3218 if (tb[IFLA_OPERSTATE]) 3219 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 3220 if (tb[IFLA_LINKMODE]) 3221 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 3222 if (tb[IFLA_GROUP]) 3223 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 3224 if (tb[IFLA_GSO_MAX_SIZE]) 3225 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE])); 3226 if (tb[IFLA_GSO_MAX_SEGS]) 3227 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); 3228 3229 return dev; 3230 } 3231 EXPORT_SYMBOL(rtnl_create_link); 3232 3233 static int rtnl_group_changelink(const struct sk_buff *skb, 3234 struct net *net, int group, 3235 struct ifinfomsg *ifm, 3236 struct netlink_ext_ack *extack, 3237 struct nlattr **tb) 3238 { 3239 struct net_device *dev, *aux; 3240 int err; 3241 3242 for_each_netdev_safe(net, dev, aux) { 3243 if (dev->group == group) { 3244 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0); 3245 if (err < 0) 3246 return err; 3247 } 3248 } 3249 3250 return 0; 3251 } 3252 3253 static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3254 struct nlattr **attr, struct netlink_ext_ack *extack) 3255 { 3256 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1]; 3257 unsigned char name_assign_type = NET_NAME_USER; 3258 struct nlattr *linkinfo[IFLA_INFO_MAX + 1]; 3259 const struct rtnl_link_ops *m_ops; 3260 struct net_device *master_dev; 3261 struct net *net = sock_net(skb->sk); 3262 const struct rtnl_link_ops *ops; 3263 struct nlattr *tb[IFLA_MAX + 1]; 3264 struct net *dest_net, *link_net; 3265 struct nlattr **slave_data; 3266 char kind[MODULE_NAME_LEN]; 3267 struct net_device *dev; 3268 struct ifinfomsg *ifm; 3269 char ifname[IFNAMSIZ]; 3270 struct nlattr **data; 3271 int err; 3272 3273 #ifdef CONFIG_MODULES 3274 replay: 3275 #endif 3276 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3277 ifla_policy, extack); 3278 if (err < 0) 3279 return err; 3280 3281 err = rtnl_ensure_unique_netns(tb, extack, false); 3282 if (err < 0) 3283 return err; 3284 3285 if (tb[IFLA_IFNAME]) 3286 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 3287 else 3288 ifname[0] = '\0'; 3289 3290 ifm = nlmsg_data(nlh); 3291 if (ifm->ifi_index > 0) 3292 dev = __dev_get_by_index(net, ifm->ifi_index); 3293 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3294 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); 3295 else 3296 dev = NULL; 3297 3298 master_dev = NULL; 3299 m_ops = NULL; 3300 if (dev) { 3301 master_dev = netdev_master_upper_dev_get(dev); 3302 if (master_dev) 3303 m_ops = master_dev->rtnl_link_ops; 3304 } 3305 3306 err = validate_linkmsg(dev, tb, extack); 3307 if (err < 0) 3308 return err; 3309 3310 if (tb[IFLA_LINKINFO]) { 3311 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX, 3312 tb[IFLA_LINKINFO], 3313 ifla_info_policy, NULL); 3314 if (err < 0) 3315 return err; 3316 } else 3317 memset(linkinfo, 0, sizeof(linkinfo)); 3318 3319 if (linkinfo[IFLA_INFO_KIND]) { 3320 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 3321 ops = rtnl_link_ops_get(kind); 3322 } else { 3323 kind[0] = '\0'; 3324 ops = NULL; 3325 } 3326 3327 data = NULL; 3328 if (ops) { 3329 if (ops->maxtype > RTNL_MAX_TYPE) 3330 return -EINVAL; 3331 3332 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 3333 err = nla_parse_nested_deprecated(attr, ops->maxtype, 3334 linkinfo[IFLA_INFO_DATA], 3335 ops->policy, extack); 3336 if (err < 0) 3337 return err; 3338 data = attr; 3339 } 3340 if (ops->validate) { 3341 err = ops->validate(tb, data, extack); 3342 if (err < 0) 3343 return err; 3344 } 3345 } 3346 3347 slave_data = NULL; 3348 if (m_ops) { 3349 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE) 3350 return -EINVAL; 3351 3352 if (m_ops->slave_maxtype && 3353 linkinfo[IFLA_INFO_SLAVE_DATA]) { 3354 err = nla_parse_nested_deprecated(slave_attr, 3355 m_ops->slave_maxtype, 3356 linkinfo[IFLA_INFO_SLAVE_DATA], 3357 m_ops->slave_policy, 3358 extack); 3359 if (err < 0) 3360 return err; 3361 slave_data = slave_attr; 3362 } 3363 } 3364 3365 if (dev) { 3366 int status = 0; 3367 3368 if (nlh->nlmsg_flags & NLM_F_EXCL) 3369 return -EEXIST; 3370 if (nlh->nlmsg_flags & NLM_F_REPLACE) 3371 return -EOPNOTSUPP; 3372 3373 if (linkinfo[IFLA_INFO_DATA]) { 3374 if (!ops || ops != dev->rtnl_link_ops || 3375 !ops->changelink) 3376 return -EOPNOTSUPP; 3377 3378 err = ops->changelink(dev, tb, data, extack); 3379 if (err < 0) 3380 return err; 3381 status |= DO_SETLINK_NOTIFY; 3382 } 3383 3384 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 3385 if (!m_ops || !m_ops->slave_changelink) 3386 return -EOPNOTSUPP; 3387 3388 err = m_ops->slave_changelink(master_dev, dev, tb, 3389 slave_data, extack); 3390 if (err < 0) 3391 return err; 3392 status |= DO_SETLINK_NOTIFY; 3393 } 3394 3395 return do_setlink(skb, dev, ifm, extack, tb, ifname, status); 3396 } 3397 3398 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 3399 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 3400 return rtnl_group_changelink(skb, net, 3401 nla_get_u32(tb[IFLA_GROUP]), 3402 ifm, extack, tb); 3403 return -ENODEV; 3404 } 3405 3406 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 3407 return -EOPNOTSUPP; 3408 3409 if (!ops) { 3410 #ifdef CONFIG_MODULES 3411 if (kind[0]) { 3412 __rtnl_unlock(); 3413 request_module("rtnl-link-%s", kind); 3414 rtnl_lock(); 3415 ops = rtnl_link_ops_get(kind); 3416 if (ops) 3417 goto replay; 3418 } 3419 #endif 3420 NL_SET_ERR_MSG(extack, "Unknown device type"); 3421 return -EOPNOTSUPP; 3422 } 3423 3424 if (!ops->alloc && !ops->setup) 3425 return -EOPNOTSUPP; 3426 3427 if (!ifname[0]) { 3428 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 3429 name_assign_type = NET_NAME_ENUM; 3430 } 3431 3432 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN); 3433 if (IS_ERR(dest_net)) 3434 return PTR_ERR(dest_net); 3435 3436 if (tb[IFLA_LINK_NETNSID]) { 3437 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 3438 3439 link_net = get_net_ns_by_id(dest_net, id); 3440 if (!link_net) { 3441 NL_SET_ERR_MSG(extack, "Unknown network namespace id"); 3442 err = -EINVAL; 3443 goto out; 3444 } 3445 err = -EPERM; 3446 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 3447 goto out; 3448 } else { 3449 link_net = NULL; 3450 } 3451 3452 dev = rtnl_create_link(link_net ? : dest_net, ifname, 3453 name_assign_type, ops, tb, extack); 3454 if (IS_ERR(dev)) { 3455 err = PTR_ERR(dev); 3456 goto out; 3457 } 3458 3459 dev->ifindex = ifm->ifi_index; 3460 3461 if (ops->newlink) 3462 err = ops->newlink(link_net ? : net, dev, tb, data, extack); 3463 else 3464 err = register_netdevice(dev); 3465 if (err < 0) { 3466 free_netdev(dev); 3467 goto out; 3468 } 3469 3470 err = rtnl_configure_link(dev, ifm); 3471 if (err < 0) 3472 goto out_unregister; 3473 if (link_net) { 3474 err = dev_change_net_namespace(dev, dest_net, ifname); 3475 if (err < 0) 3476 goto out_unregister; 3477 } 3478 if (tb[IFLA_MASTER]) { 3479 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 3480 if (err) 3481 goto out_unregister; 3482 } 3483 out: 3484 if (link_net) 3485 put_net(link_net); 3486 put_net(dest_net); 3487 return err; 3488 out_unregister: 3489 if (ops->newlink) { 3490 LIST_HEAD(list_kill); 3491 3492 ops->dellink(dev, &list_kill); 3493 unregister_netdevice_many(&list_kill); 3494 } else { 3495 unregister_netdevice(dev); 3496 } 3497 goto out; 3498 } 3499 3500 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3501 struct netlink_ext_ack *extack) 3502 { 3503 struct nlattr **attr; 3504 int ret; 3505 3506 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL); 3507 if (!attr) 3508 return -ENOMEM; 3509 3510 ret = __rtnl_newlink(skb, nlh, attr, extack); 3511 kfree(attr); 3512 return ret; 3513 } 3514 3515 static int rtnl_valid_getlink_req(struct sk_buff *skb, 3516 const struct nlmsghdr *nlh, 3517 struct nlattr **tb, 3518 struct netlink_ext_ack *extack) 3519 { 3520 struct ifinfomsg *ifm; 3521 int i, err; 3522 3523 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 3524 NL_SET_ERR_MSG(extack, "Invalid header for get link"); 3525 return -EINVAL; 3526 } 3527 3528 if (!netlink_strict_get_check(skb)) 3529 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3530 ifla_policy, extack); 3531 3532 ifm = nlmsg_data(nlh); 3533 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 3534 ifm->ifi_change) { 3535 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request"); 3536 return -EINVAL; 3537 } 3538 3539 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX, 3540 ifla_policy, extack); 3541 if (err) 3542 return err; 3543 3544 for (i = 0; i <= IFLA_MAX; i++) { 3545 if (!tb[i]) 3546 continue; 3547 3548 switch (i) { 3549 case IFLA_IFNAME: 3550 case IFLA_ALT_IFNAME: 3551 case IFLA_EXT_MASK: 3552 case IFLA_TARGET_NETNSID: 3553 break; 3554 default: 3555 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request"); 3556 return -EINVAL; 3557 } 3558 } 3559 3560 return 0; 3561 } 3562 3563 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3564 struct netlink_ext_ack *extack) 3565 { 3566 struct net *net = sock_net(skb->sk); 3567 struct net *tgt_net = net; 3568 struct ifinfomsg *ifm; 3569 struct nlattr *tb[IFLA_MAX+1]; 3570 struct net_device *dev = NULL; 3571 struct sk_buff *nskb; 3572 int netnsid = -1; 3573 int err; 3574 u32 ext_filter_mask = 0; 3575 3576 err = rtnl_valid_getlink_req(skb, nlh, tb, extack); 3577 if (err < 0) 3578 return err; 3579 3580 err = rtnl_ensure_unique_netns(tb, extack, true); 3581 if (err < 0) 3582 return err; 3583 3584 if (tb[IFLA_TARGET_NETNSID]) { 3585 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); 3586 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); 3587 if (IS_ERR(tgt_net)) 3588 return PTR_ERR(tgt_net); 3589 } 3590 3591 if (tb[IFLA_EXT_MASK]) 3592 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 3593 3594 err = -EINVAL; 3595 ifm = nlmsg_data(nlh); 3596 if (ifm->ifi_index > 0) 3597 dev = __dev_get_by_index(tgt_net, ifm->ifi_index); 3598 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3599 dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME], 3600 tb[IFLA_ALT_IFNAME], NULL); 3601 else 3602 goto out; 3603 3604 err = -ENODEV; 3605 if (dev == NULL) 3606 goto out; 3607 3608 err = -ENOBUFS; 3609 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 3610 if (nskb == NULL) 3611 goto out; 3612 3613 err = rtnl_fill_ifinfo(nskb, dev, net, 3614 RTM_NEWLINK, NETLINK_CB(skb).portid, 3615 nlh->nlmsg_seq, 0, 0, ext_filter_mask, 3616 0, NULL, 0, netnsid, GFP_KERNEL); 3617 if (err < 0) { 3618 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 3619 WARN_ON(err == -EMSGSIZE); 3620 kfree_skb(nskb); 3621 } else 3622 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3623 out: 3624 if (netnsid >= 0) 3625 put_net(tgt_net); 3626 3627 return err; 3628 } 3629 3630 static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr, 3631 bool *changed, struct netlink_ext_ack *extack) 3632 { 3633 char *alt_ifname; 3634 size_t size; 3635 int err; 3636 3637 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack); 3638 if (err) 3639 return err; 3640 3641 if (cmd == RTM_NEWLINKPROP) { 3642 size = rtnl_prop_list_size(dev); 3643 size += nla_total_size(ALTIFNAMSIZ); 3644 if (size >= U16_MAX) { 3645 NL_SET_ERR_MSG(extack, 3646 "effective property list too long"); 3647 return -EINVAL; 3648 } 3649 } 3650 3651 alt_ifname = nla_strdup(attr, GFP_KERNEL_ACCOUNT); 3652 if (!alt_ifname) 3653 return -ENOMEM; 3654 3655 if (cmd == RTM_NEWLINKPROP) { 3656 err = netdev_name_node_alt_create(dev, alt_ifname); 3657 if (!err) 3658 alt_ifname = NULL; 3659 } else if (cmd == RTM_DELLINKPROP) { 3660 err = netdev_name_node_alt_destroy(dev, alt_ifname); 3661 } else { 3662 WARN_ON_ONCE(1); 3663 err = -EINVAL; 3664 } 3665 3666 kfree(alt_ifname); 3667 if (!err) 3668 *changed = true; 3669 return err; 3670 } 3671 3672 static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh, 3673 struct netlink_ext_ack *extack) 3674 { 3675 struct net *net = sock_net(skb->sk); 3676 struct nlattr *tb[IFLA_MAX + 1]; 3677 struct net_device *dev; 3678 struct ifinfomsg *ifm; 3679 bool changed = false; 3680 struct nlattr *attr; 3681 int err, rem; 3682 3683 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 3684 if (err) 3685 return err; 3686 3687 err = rtnl_ensure_unique_netns(tb, extack, true); 3688 if (err) 3689 return err; 3690 3691 ifm = nlmsg_data(nlh); 3692 if (ifm->ifi_index > 0) 3693 dev = __dev_get_by_index(net, ifm->ifi_index); 3694 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3695 dev = rtnl_dev_get(net, tb[IFLA_IFNAME], 3696 tb[IFLA_ALT_IFNAME], NULL); 3697 else 3698 return -EINVAL; 3699 3700 if (!dev) 3701 return -ENODEV; 3702 3703 if (!tb[IFLA_PROP_LIST]) 3704 return 0; 3705 3706 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) { 3707 switch (nla_type(attr)) { 3708 case IFLA_ALT_IFNAME: 3709 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack); 3710 if (err) 3711 return err; 3712 break; 3713 } 3714 } 3715 3716 if (changed) 3717 netdev_state_change(dev); 3718 return 0; 3719 } 3720 3721 static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, 3722 struct netlink_ext_ack *extack) 3723 { 3724 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack); 3725 } 3726 3727 static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, 3728 struct netlink_ext_ack *extack) 3729 { 3730 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack); 3731 } 3732 3733 static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 3734 { 3735 struct net *net = sock_net(skb->sk); 3736 size_t min_ifinfo_dump_size = 0; 3737 struct nlattr *tb[IFLA_MAX+1]; 3738 u32 ext_filter_mask = 0; 3739 struct net_device *dev; 3740 int hdrlen; 3741 3742 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 3743 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 3744 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 3745 3746 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { 3747 if (tb[IFLA_EXT_MASK]) 3748 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 3749 } 3750 3751 if (!ext_filter_mask) 3752 return NLMSG_GOODSIZE; 3753 /* 3754 * traverse the list of net devices and compute the minimum 3755 * buffer size based upon the filter mask. 3756 */ 3757 rcu_read_lock(); 3758 for_each_netdev_rcu(net, dev) { 3759 min_ifinfo_dump_size = max(min_ifinfo_dump_size, 3760 if_nlmsg_size(dev, ext_filter_mask)); 3761 } 3762 rcu_read_unlock(); 3763 3764 return nlmsg_total_size(min_ifinfo_dump_size); 3765 } 3766 3767 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 3768 { 3769 int idx; 3770 int s_idx = cb->family; 3771 int type = cb->nlh->nlmsg_type - RTM_BASE; 3772 int ret = 0; 3773 3774 if (s_idx == 0) 3775 s_idx = 1; 3776 3777 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 3778 struct rtnl_link __rcu **tab; 3779 struct rtnl_link *link; 3780 rtnl_dumpit_func dumpit; 3781 3782 if (idx < s_idx || idx == PF_PACKET) 3783 continue; 3784 3785 if (type < 0 || type >= RTM_NR_MSGTYPES) 3786 continue; 3787 3788 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]); 3789 if (!tab) 3790 continue; 3791 3792 link = rcu_dereference_rtnl(tab[type]); 3793 if (!link) 3794 continue; 3795 3796 dumpit = link->dumpit; 3797 if (!dumpit) 3798 continue; 3799 3800 if (idx > s_idx) { 3801 memset(&cb->args[0], 0, sizeof(cb->args)); 3802 cb->prev_seq = 0; 3803 cb->seq = 0; 3804 } 3805 ret = dumpit(skb, cb); 3806 if (ret) 3807 break; 3808 } 3809 cb->family = idx; 3810 3811 return skb->len ? : ret; 3812 } 3813 3814 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 3815 unsigned int change, 3816 u32 event, gfp_t flags, int *new_nsid, 3817 int new_ifindex) 3818 { 3819 struct net *net = dev_net(dev); 3820 struct sk_buff *skb; 3821 int err = -ENOBUFS; 3822 size_t if_info_size; 3823 3824 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 3825 if (skb == NULL) 3826 goto errout; 3827 3828 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev), 3829 type, 0, 0, change, 0, 0, event, 3830 new_nsid, new_ifindex, -1, flags); 3831 if (err < 0) { 3832 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 3833 WARN_ON(err == -EMSGSIZE); 3834 kfree_skb(skb); 3835 goto errout; 3836 } 3837 return skb; 3838 errout: 3839 if (err < 0) 3840 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3841 return NULL; 3842 } 3843 3844 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 3845 { 3846 struct net *net = dev_net(dev); 3847 3848 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 3849 } 3850 3851 static void rtmsg_ifinfo_event(int type, struct net_device *dev, 3852 unsigned int change, u32 event, 3853 gfp_t flags, int *new_nsid, int new_ifindex) 3854 { 3855 struct sk_buff *skb; 3856 3857 if (dev->reg_state != NETREG_REGISTERED) 3858 return; 3859 3860 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid, 3861 new_ifindex); 3862 if (skb) 3863 rtmsg_ifinfo_send(skb, dev, flags); 3864 } 3865 3866 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 3867 gfp_t flags) 3868 { 3869 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 3870 NULL, 0); 3871 } 3872 3873 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, 3874 gfp_t flags, int *new_nsid, int new_ifindex) 3875 { 3876 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 3877 new_nsid, new_ifindex); 3878 } 3879 3880 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 3881 struct net_device *dev, 3882 u8 *addr, u16 vid, u32 pid, u32 seq, 3883 int type, unsigned int flags, 3884 int nlflags, u16 ndm_state) 3885 { 3886 struct nlmsghdr *nlh; 3887 struct ndmsg *ndm; 3888 3889 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 3890 if (!nlh) 3891 return -EMSGSIZE; 3892 3893 ndm = nlmsg_data(nlh); 3894 ndm->ndm_family = AF_BRIDGE; 3895 ndm->ndm_pad1 = 0; 3896 ndm->ndm_pad2 = 0; 3897 ndm->ndm_flags = flags; 3898 ndm->ndm_type = 0; 3899 ndm->ndm_ifindex = dev->ifindex; 3900 ndm->ndm_state = ndm_state; 3901 3902 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 3903 goto nla_put_failure; 3904 if (vid) 3905 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 3906 goto nla_put_failure; 3907 3908 nlmsg_end(skb, nlh); 3909 return 0; 3910 3911 nla_put_failure: 3912 nlmsg_cancel(skb, nlh); 3913 return -EMSGSIZE; 3914 } 3915 3916 static inline size_t rtnl_fdb_nlmsg_size(void) 3917 { 3918 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 3919 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 3920 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 3921 0; 3922 } 3923 3924 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 3925 u16 ndm_state) 3926 { 3927 struct net *net = dev_net(dev); 3928 struct sk_buff *skb; 3929 int err = -ENOBUFS; 3930 3931 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 3932 if (!skb) 3933 goto errout; 3934 3935 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 3936 0, 0, type, NTF_SELF, 0, ndm_state); 3937 if (err < 0) { 3938 kfree_skb(skb); 3939 goto errout; 3940 } 3941 3942 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 3943 return; 3944 errout: 3945 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 3946 } 3947 3948 /* 3949 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 3950 */ 3951 int ndo_dflt_fdb_add(struct ndmsg *ndm, 3952 struct nlattr *tb[], 3953 struct net_device *dev, 3954 const unsigned char *addr, u16 vid, 3955 u16 flags) 3956 { 3957 int err = -EINVAL; 3958 3959 /* If aging addresses are supported device will need to 3960 * implement its own handler for this. 3961 */ 3962 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 3963 netdev_info(dev, "default FDB implementation only supports local addresses\n"); 3964 return err; 3965 } 3966 3967 if (vid) { 3968 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n"); 3969 return err; 3970 } 3971 3972 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3973 err = dev_uc_add_excl(dev, addr); 3974 else if (is_multicast_ether_addr(addr)) 3975 err = dev_mc_add_excl(dev, addr); 3976 3977 /* Only return duplicate errors if NLM_F_EXCL is set */ 3978 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 3979 err = 0; 3980 3981 return err; 3982 } 3983 EXPORT_SYMBOL(ndo_dflt_fdb_add); 3984 3985 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid, 3986 struct netlink_ext_ack *extack) 3987 { 3988 u16 vid = 0; 3989 3990 if (vlan_attr) { 3991 if (nla_len(vlan_attr) != sizeof(u16)) { 3992 NL_SET_ERR_MSG(extack, "invalid vlan attribute size"); 3993 return -EINVAL; 3994 } 3995 3996 vid = nla_get_u16(vlan_attr); 3997 3998 if (!vid || vid >= VLAN_VID_MASK) { 3999 NL_SET_ERR_MSG(extack, "invalid vlan id"); 4000 return -EINVAL; 4001 } 4002 } 4003 *p_vid = vid; 4004 return 0; 4005 } 4006 4007 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, 4008 struct netlink_ext_ack *extack) 4009 { 4010 struct net *net = sock_net(skb->sk); 4011 struct ndmsg *ndm; 4012 struct nlattr *tb[NDA_MAX+1]; 4013 struct net_device *dev; 4014 u8 *addr; 4015 u16 vid; 4016 int err; 4017 4018 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, 4019 extack); 4020 if (err < 0) 4021 return err; 4022 4023 ndm = nlmsg_data(nlh); 4024 if (ndm->ndm_ifindex == 0) { 4025 NL_SET_ERR_MSG(extack, "invalid ifindex"); 4026 return -EINVAL; 4027 } 4028 4029 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 4030 if (dev == NULL) { 4031 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4032 return -ENODEV; 4033 } 4034 4035 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 4036 NL_SET_ERR_MSG(extack, "invalid address"); 4037 return -EINVAL; 4038 } 4039 4040 if (dev->type != ARPHRD_ETHER) { 4041 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices"); 4042 return -EINVAL; 4043 } 4044 4045 addr = nla_data(tb[NDA_LLADDR]); 4046 4047 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 4048 if (err) 4049 return err; 4050 4051 err = -EOPNOTSUPP; 4052 4053 /* Support fdb on master device the net/bridge default case */ 4054 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 4055 netif_is_bridge_port(dev)) { 4056 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4057 const struct net_device_ops *ops = br_dev->netdev_ops; 4058 4059 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 4060 nlh->nlmsg_flags, extack); 4061 if (err) 4062 goto out; 4063 else 4064 ndm->ndm_flags &= ~NTF_MASTER; 4065 } 4066 4067 /* Embedded bridge, macvlan, and any other device support */ 4068 if ((ndm->ndm_flags & NTF_SELF)) { 4069 if (dev->netdev_ops->ndo_fdb_add) 4070 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 4071 vid, 4072 nlh->nlmsg_flags, 4073 extack); 4074 else 4075 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 4076 nlh->nlmsg_flags); 4077 4078 if (!err) { 4079 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 4080 ndm->ndm_state); 4081 ndm->ndm_flags &= ~NTF_SELF; 4082 } 4083 } 4084 out: 4085 return err; 4086 } 4087 4088 /* 4089 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 4090 */ 4091 int ndo_dflt_fdb_del(struct ndmsg *ndm, 4092 struct nlattr *tb[], 4093 struct net_device *dev, 4094 const unsigned char *addr, u16 vid) 4095 { 4096 int err = -EINVAL; 4097 4098 /* If aging addresses are supported device will need to 4099 * implement its own handler for this. 4100 */ 4101 if (!(ndm->ndm_state & NUD_PERMANENT)) { 4102 netdev_info(dev, "default FDB implementation only supports local addresses\n"); 4103 return err; 4104 } 4105 4106 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 4107 err = dev_uc_del(dev, addr); 4108 else if (is_multicast_ether_addr(addr)) 4109 err = dev_mc_del(dev, addr); 4110 4111 return err; 4112 } 4113 EXPORT_SYMBOL(ndo_dflt_fdb_del); 4114 4115 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, 4116 struct netlink_ext_ack *extack) 4117 { 4118 struct net *net = sock_net(skb->sk); 4119 struct ndmsg *ndm; 4120 struct nlattr *tb[NDA_MAX+1]; 4121 struct net_device *dev; 4122 __u8 *addr; 4123 int err; 4124 u16 vid; 4125 4126 if (!netlink_capable(skb, CAP_NET_ADMIN)) 4127 return -EPERM; 4128 4129 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, 4130 extack); 4131 if (err < 0) 4132 return err; 4133 4134 ndm = nlmsg_data(nlh); 4135 if (ndm->ndm_ifindex == 0) { 4136 NL_SET_ERR_MSG(extack, "invalid ifindex"); 4137 return -EINVAL; 4138 } 4139 4140 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 4141 if (dev == NULL) { 4142 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4143 return -ENODEV; 4144 } 4145 4146 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 4147 NL_SET_ERR_MSG(extack, "invalid address"); 4148 return -EINVAL; 4149 } 4150 4151 if (dev->type != ARPHRD_ETHER) { 4152 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices"); 4153 return -EINVAL; 4154 } 4155 4156 addr = nla_data(tb[NDA_LLADDR]); 4157 4158 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 4159 if (err) 4160 return err; 4161 4162 err = -EOPNOTSUPP; 4163 4164 /* Support fdb on master device the net/bridge default case */ 4165 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 4166 netif_is_bridge_port(dev)) { 4167 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4168 const struct net_device_ops *ops = br_dev->netdev_ops; 4169 4170 if (ops->ndo_fdb_del) 4171 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 4172 4173 if (err) 4174 goto out; 4175 else 4176 ndm->ndm_flags &= ~NTF_MASTER; 4177 } 4178 4179 /* Embedded bridge, macvlan, and any other device support */ 4180 if (ndm->ndm_flags & NTF_SELF) { 4181 if (dev->netdev_ops->ndo_fdb_del) 4182 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 4183 vid); 4184 else 4185 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 4186 4187 if (!err) { 4188 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 4189 ndm->ndm_state); 4190 ndm->ndm_flags &= ~NTF_SELF; 4191 } 4192 } 4193 out: 4194 return err; 4195 } 4196 4197 static int nlmsg_populate_fdb(struct sk_buff *skb, 4198 struct netlink_callback *cb, 4199 struct net_device *dev, 4200 int *idx, 4201 struct netdev_hw_addr_list *list) 4202 { 4203 struct netdev_hw_addr *ha; 4204 int err; 4205 u32 portid, seq; 4206 4207 portid = NETLINK_CB(cb->skb).portid; 4208 seq = cb->nlh->nlmsg_seq; 4209 4210 list_for_each_entry(ha, &list->list, list) { 4211 if (*idx < cb->args[2]) 4212 goto skip; 4213 4214 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 4215 portid, seq, 4216 RTM_NEWNEIGH, NTF_SELF, 4217 NLM_F_MULTI, NUD_PERMANENT); 4218 if (err < 0) 4219 return err; 4220 skip: 4221 *idx += 1; 4222 } 4223 return 0; 4224 } 4225 4226 /** 4227 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 4228 * @skb: socket buffer to store message in 4229 * @cb: netlink callback 4230 * @dev: netdevice 4231 * @filter_dev: ignored 4232 * @idx: the number of FDB table entries dumped is added to *@idx 4233 * 4234 * Default netdevice operation to dump the existing unicast address list. 4235 * Returns number of addresses from list put in skb. 4236 */ 4237 int ndo_dflt_fdb_dump(struct sk_buff *skb, 4238 struct netlink_callback *cb, 4239 struct net_device *dev, 4240 struct net_device *filter_dev, 4241 int *idx) 4242 { 4243 int err; 4244 4245 if (dev->type != ARPHRD_ETHER) 4246 return -EINVAL; 4247 4248 netif_addr_lock_bh(dev); 4249 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 4250 if (err) 4251 goto out; 4252 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 4253 out: 4254 netif_addr_unlock_bh(dev); 4255 return err; 4256 } 4257 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 4258 4259 static int valid_fdb_dump_strict(const struct nlmsghdr *nlh, 4260 int *br_idx, int *brport_idx, 4261 struct netlink_ext_ack *extack) 4262 { 4263 struct nlattr *tb[NDA_MAX + 1]; 4264 struct ndmsg *ndm; 4265 int err, i; 4266 4267 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { 4268 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request"); 4269 return -EINVAL; 4270 } 4271 4272 ndm = nlmsg_data(nlh); 4273 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || 4274 ndm->ndm_flags || ndm->ndm_type) { 4275 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request"); 4276 return -EINVAL; 4277 } 4278 4279 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, 4280 NDA_MAX, NULL, extack); 4281 if (err < 0) 4282 return err; 4283 4284 *brport_idx = ndm->ndm_ifindex; 4285 for (i = 0; i <= NDA_MAX; ++i) { 4286 if (!tb[i]) 4287 continue; 4288 4289 switch (i) { 4290 case NDA_IFINDEX: 4291 if (nla_len(tb[i]) != sizeof(u32)) { 4292 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request"); 4293 return -EINVAL; 4294 } 4295 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]); 4296 break; 4297 case NDA_MASTER: 4298 if (nla_len(tb[i]) != sizeof(u32)) { 4299 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request"); 4300 return -EINVAL; 4301 } 4302 *br_idx = nla_get_u32(tb[NDA_MASTER]); 4303 break; 4304 default: 4305 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request"); 4306 return -EINVAL; 4307 } 4308 } 4309 4310 return 0; 4311 } 4312 4313 static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh, 4314 int *br_idx, int *brport_idx, 4315 struct netlink_ext_ack *extack) 4316 { 4317 struct nlattr *tb[IFLA_MAX+1]; 4318 int err; 4319 4320 /* A hack to preserve kernel<->userspace interface. 4321 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0. 4322 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails. 4323 * So, check for ndmsg with an optional u32 attribute (not used here). 4324 * Fortunately these sizes don't conflict with the size of ifinfomsg 4325 * with an optional attribute. 4326 */ 4327 if (nlmsg_len(nlh) != sizeof(struct ndmsg) && 4328 (nlmsg_len(nlh) != sizeof(struct ndmsg) + 4329 nla_attr_size(sizeof(u32)))) { 4330 struct ifinfomsg *ifm; 4331 4332 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), 4333 tb, IFLA_MAX, ifla_policy, 4334 extack); 4335 if (err < 0) { 4336 return -EINVAL; 4337 } else if (err == 0) { 4338 if (tb[IFLA_MASTER]) 4339 *br_idx = nla_get_u32(tb[IFLA_MASTER]); 4340 } 4341 4342 ifm = nlmsg_data(nlh); 4343 *brport_idx = ifm->ifi_index; 4344 } 4345 return 0; 4346 } 4347 4348 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 4349 { 4350 struct net_device *dev; 4351 struct net_device *br_dev = NULL; 4352 const struct net_device_ops *ops = NULL; 4353 const struct net_device_ops *cops = NULL; 4354 struct net *net = sock_net(skb->sk); 4355 struct hlist_head *head; 4356 int brport_idx = 0; 4357 int br_idx = 0; 4358 int h, s_h; 4359 int idx = 0, s_idx; 4360 int err = 0; 4361 int fidx = 0; 4362 4363 if (cb->strict_check) 4364 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx, 4365 cb->extack); 4366 else 4367 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx, 4368 cb->extack); 4369 if (err < 0) 4370 return err; 4371 4372 if (br_idx) { 4373 br_dev = __dev_get_by_index(net, br_idx); 4374 if (!br_dev) 4375 return -ENODEV; 4376 4377 ops = br_dev->netdev_ops; 4378 } 4379 4380 s_h = cb->args[0]; 4381 s_idx = cb->args[1]; 4382 4383 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4384 idx = 0; 4385 head = &net->dev_index_head[h]; 4386 hlist_for_each_entry(dev, head, index_hlist) { 4387 4388 if (brport_idx && (dev->ifindex != brport_idx)) 4389 continue; 4390 4391 if (!br_idx) { /* user did not specify a specific bridge */ 4392 if (netif_is_bridge_port(dev)) { 4393 br_dev = netdev_master_upper_dev_get(dev); 4394 cops = br_dev->netdev_ops; 4395 } 4396 } else { 4397 if (dev != br_dev && 4398 !netif_is_bridge_port(dev)) 4399 continue; 4400 4401 if (br_dev != netdev_master_upper_dev_get(dev) && 4402 !(dev->priv_flags & IFF_EBRIDGE)) 4403 continue; 4404 cops = ops; 4405 } 4406 4407 if (idx < s_idx) 4408 goto cont; 4409 4410 if (netif_is_bridge_port(dev)) { 4411 if (cops && cops->ndo_fdb_dump) { 4412 err = cops->ndo_fdb_dump(skb, cb, 4413 br_dev, dev, 4414 &fidx); 4415 if (err == -EMSGSIZE) 4416 goto out; 4417 } 4418 } 4419 4420 if (dev->netdev_ops->ndo_fdb_dump) 4421 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 4422 dev, NULL, 4423 &fidx); 4424 else 4425 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 4426 &fidx); 4427 if (err == -EMSGSIZE) 4428 goto out; 4429 4430 cops = NULL; 4431 4432 /* reset fdb offset to 0 for rest of the interfaces */ 4433 cb->args[2] = 0; 4434 fidx = 0; 4435 cont: 4436 idx++; 4437 } 4438 } 4439 4440 out: 4441 cb->args[0] = h; 4442 cb->args[1] = idx; 4443 cb->args[2] = fidx; 4444 4445 return skb->len; 4446 } 4447 4448 static int valid_fdb_get_strict(const struct nlmsghdr *nlh, 4449 struct nlattr **tb, u8 *ndm_flags, 4450 int *br_idx, int *brport_idx, u8 **addr, 4451 u16 *vid, struct netlink_ext_ack *extack) 4452 { 4453 struct ndmsg *ndm; 4454 int err, i; 4455 4456 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { 4457 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request"); 4458 return -EINVAL; 4459 } 4460 4461 ndm = nlmsg_data(nlh); 4462 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || 4463 ndm->ndm_type) { 4464 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request"); 4465 return -EINVAL; 4466 } 4467 4468 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) { 4469 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request"); 4470 return -EINVAL; 4471 } 4472 4473 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, 4474 NDA_MAX, nda_policy, extack); 4475 if (err < 0) 4476 return err; 4477 4478 *ndm_flags = ndm->ndm_flags; 4479 *brport_idx = ndm->ndm_ifindex; 4480 for (i = 0; i <= NDA_MAX; ++i) { 4481 if (!tb[i]) 4482 continue; 4483 4484 switch (i) { 4485 case NDA_MASTER: 4486 *br_idx = nla_get_u32(tb[i]); 4487 break; 4488 case NDA_LLADDR: 4489 if (nla_len(tb[i]) != ETH_ALEN) { 4490 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request"); 4491 return -EINVAL; 4492 } 4493 *addr = nla_data(tb[i]); 4494 break; 4495 case NDA_VLAN: 4496 err = fdb_vid_parse(tb[i], vid, extack); 4497 if (err) 4498 return err; 4499 break; 4500 case NDA_VNI: 4501 break; 4502 default: 4503 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request"); 4504 return -EINVAL; 4505 } 4506 } 4507 4508 return 0; 4509 } 4510 4511 static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh, 4512 struct netlink_ext_ack *extack) 4513 { 4514 struct net_device *dev = NULL, *br_dev = NULL; 4515 const struct net_device_ops *ops = NULL; 4516 struct net *net = sock_net(in_skb->sk); 4517 struct nlattr *tb[NDA_MAX + 1]; 4518 struct sk_buff *skb; 4519 int brport_idx = 0; 4520 u8 ndm_flags = 0; 4521 int br_idx = 0; 4522 u8 *addr = NULL; 4523 u16 vid = 0; 4524 int err; 4525 4526 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx, 4527 &brport_idx, &addr, &vid, extack); 4528 if (err < 0) 4529 return err; 4530 4531 if (!addr) { 4532 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request"); 4533 return -EINVAL; 4534 } 4535 4536 if (brport_idx) { 4537 dev = __dev_get_by_index(net, brport_idx); 4538 if (!dev) { 4539 NL_SET_ERR_MSG(extack, "Unknown device ifindex"); 4540 return -ENODEV; 4541 } 4542 } 4543 4544 if (br_idx) { 4545 if (dev) { 4546 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive"); 4547 return -EINVAL; 4548 } 4549 4550 br_dev = __dev_get_by_index(net, br_idx); 4551 if (!br_dev) { 4552 NL_SET_ERR_MSG(extack, "Invalid master ifindex"); 4553 return -EINVAL; 4554 } 4555 ops = br_dev->netdev_ops; 4556 } 4557 4558 if (dev) { 4559 if (!ndm_flags || (ndm_flags & NTF_MASTER)) { 4560 if (!netif_is_bridge_port(dev)) { 4561 NL_SET_ERR_MSG(extack, "Device is not a bridge port"); 4562 return -EINVAL; 4563 } 4564 br_dev = netdev_master_upper_dev_get(dev); 4565 if (!br_dev) { 4566 NL_SET_ERR_MSG(extack, "Master of device not found"); 4567 return -EINVAL; 4568 } 4569 ops = br_dev->netdev_ops; 4570 } else { 4571 if (!(ndm_flags & NTF_SELF)) { 4572 NL_SET_ERR_MSG(extack, "Missing NTF_SELF"); 4573 return -EINVAL; 4574 } 4575 ops = dev->netdev_ops; 4576 } 4577 } 4578 4579 if (!br_dev && !dev) { 4580 NL_SET_ERR_MSG(extack, "No device specified"); 4581 return -ENODEV; 4582 } 4583 4584 if (!ops || !ops->ndo_fdb_get) { 4585 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device"); 4586 return -EOPNOTSUPP; 4587 } 4588 4589 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 4590 if (!skb) 4591 return -ENOBUFS; 4592 4593 if (br_dev) 4594 dev = br_dev; 4595 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid, 4596 NETLINK_CB(in_skb).portid, 4597 nlh->nlmsg_seq, extack); 4598 if (err) 4599 goto out; 4600 4601 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); 4602 out: 4603 kfree_skb(skb); 4604 return err; 4605 } 4606 4607 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 4608 unsigned int attrnum, unsigned int flag) 4609 { 4610 if (mask & flag) 4611 return nla_put_u8(skb, attrnum, !!(flags & flag)); 4612 return 0; 4613 } 4614 4615 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 4616 struct net_device *dev, u16 mode, 4617 u32 flags, u32 mask, int nlflags, 4618 u32 filter_mask, 4619 int (*vlan_fill)(struct sk_buff *skb, 4620 struct net_device *dev, 4621 u32 filter_mask)) 4622 { 4623 struct nlmsghdr *nlh; 4624 struct ifinfomsg *ifm; 4625 struct nlattr *br_afspec; 4626 struct nlattr *protinfo; 4627 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 4628 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4629 int err = 0; 4630 4631 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 4632 if (nlh == NULL) 4633 return -EMSGSIZE; 4634 4635 ifm = nlmsg_data(nlh); 4636 ifm->ifi_family = AF_BRIDGE; 4637 ifm->__ifi_pad = 0; 4638 ifm->ifi_type = dev->type; 4639 ifm->ifi_index = dev->ifindex; 4640 ifm->ifi_flags = dev_get_flags(dev); 4641 ifm->ifi_change = 0; 4642 4643 4644 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 4645 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 4646 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 4647 (br_dev && 4648 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 4649 (dev->addr_len && 4650 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 4651 (dev->ifindex != dev_get_iflink(dev) && 4652 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 4653 goto nla_put_failure; 4654 4655 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 4656 if (!br_afspec) 4657 goto nla_put_failure; 4658 4659 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 4660 nla_nest_cancel(skb, br_afspec); 4661 goto nla_put_failure; 4662 } 4663 4664 if (mode != BRIDGE_MODE_UNDEF) { 4665 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 4666 nla_nest_cancel(skb, br_afspec); 4667 goto nla_put_failure; 4668 } 4669 } 4670 if (vlan_fill) { 4671 err = vlan_fill(skb, dev, filter_mask); 4672 if (err) { 4673 nla_nest_cancel(skb, br_afspec); 4674 goto nla_put_failure; 4675 } 4676 } 4677 nla_nest_end(skb, br_afspec); 4678 4679 protinfo = nla_nest_start(skb, IFLA_PROTINFO); 4680 if (!protinfo) 4681 goto nla_put_failure; 4682 4683 if (brport_nla_put_flag(skb, flags, mask, 4684 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 4685 brport_nla_put_flag(skb, flags, mask, 4686 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 4687 brport_nla_put_flag(skb, flags, mask, 4688 IFLA_BRPORT_FAST_LEAVE, 4689 BR_MULTICAST_FAST_LEAVE) || 4690 brport_nla_put_flag(skb, flags, mask, 4691 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 4692 brport_nla_put_flag(skb, flags, mask, 4693 IFLA_BRPORT_LEARNING, BR_LEARNING) || 4694 brport_nla_put_flag(skb, flags, mask, 4695 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 4696 brport_nla_put_flag(skb, flags, mask, 4697 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 4698 brport_nla_put_flag(skb, flags, mask, 4699 IFLA_BRPORT_PROXYARP, BR_PROXYARP) || 4700 brport_nla_put_flag(skb, flags, mask, 4701 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) || 4702 brport_nla_put_flag(skb, flags, mask, 4703 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) { 4704 nla_nest_cancel(skb, protinfo); 4705 goto nla_put_failure; 4706 } 4707 4708 nla_nest_end(skb, protinfo); 4709 4710 nlmsg_end(skb, nlh); 4711 return 0; 4712 nla_put_failure: 4713 nlmsg_cancel(skb, nlh); 4714 return err ? err : -EMSGSIZE; 4715 } 4716 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 4717 4718 static int valid_bridge_getlink_req(const struct nlmsghdr *nlh, 4719 bool strict_check, u32 *filter_mask, 4720 struct netlink_ext_ack *extack) 4721 { 4722 struct nlattr *tb[IFLA_MAX+1]; 4723 int err, i; 4724 4725 if (strict_check) { 4726 struct ifinfomsg *ifm; 4727 4728 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 4729 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump"); 4730 return -EINVAL; 4731 } 4732 4733 ifm = nlmsg_data(nlh); 4734 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 4735 ifm->ifi_change || ifm->ifi_index) { 4736 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request"); 4737 return -EINVAL; 4738 } 4739 4740 err = nlmsg_parse_deprecated_strict(nlh, 4741 sizeof(struct ifinfomsg), 4742 tb, IFLA_MAX, ifla_policy, 4743 extack); 4744 } else { 4745 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), 4746 tb, IFLA_MAX, ifla_policy, 4747 extack); 4748 } 4749 if (err < 0) 4750 return err; 4751 4752 /* new attributes should only be added with strict checking */ 4753 for (i = 0; i <= IFLA_MAX; ++i) { 4754 if (!tb[i]) 4755 continue; 4756 4757 switch (i) { 4758 case IFLA_EXT_MASK: 4759 *filter_mask = nla_get_u32(tb[i]); 4760 break; 4761 default: 4762 if (strict_check) { 4763 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request"); 4764 return -EINVAL; 4765 } 4766 } 4767 } 4768 4769 return 0; 4770 } 4771 4772 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 4773 { 4774 const struct nlmsghdr *nlh = cb->nlh; 4775 struct net *net = sock_net(skb->sk); 4776 struct net_device *dev; 4777 int idx = 0; 4778 u32 portid = NETLINK_CB(cb->skb).portid; 4779 u32 seq = nlh->nlmsg_seq; 4780 u32 filter_mask = 0; 4781 int err; 4782 4783 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask, 4784 cb->extack); 4785 if (err < 0 && cb->strict_check) 4786 return err; 4787 4788 rcu_read_lock(); 4789 for_each_netdev_rcu(net, dev) { 4790 const struct net_device_ops *ops = dev->netdev_ops; 4791 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4792 4793 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 4794 if (idx >= cb->args[0]) { 4795 err = br_dev->netdev_ops->ndo_bridge_getlink( 4796 skb, portid, seq, dev, 4797 filter_mask, NLM_F_MULTI); 4798 if (err < 0 && err != -EOPNOTSUPP) { 4799 if (likely(skb->len)) 4800 break; 4801 4802 goto out_err; 4803 } 4804 } 4805 idx++; 4806 } 4807 4808 if (ops->ndo_bridge_getlink) { 4809 if (idx >= cb->args[0]) { 4810 err = ops->ndo_bridge_getlink(skb, portid, 4811 seq, dev, 4812 filter_mask, 4813 NLM_F_MULTI); 4814 if (err < 0 && err != -EOPNOTSUPP) { 4815 if (likely(skb->len)) 4816 break; 4817 4818 goto out_err; 4819 } 4820 } 4821 idx++; 4822 } 4823 } 4824 err = skb->len; 4825 out_err: 4826 rcu_read_unlock(); 4827 cb->args[0] = idx; 4828 4829 return err; 4830 } 4831 4832 static inline size_t bridge_nlmsg_size(void) 4833 { 4834 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 4835 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 4836 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 4837 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 4838 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 4839 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 4840 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 4841 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 4842 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 4843 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 4844 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 4845 } 4846 4847 static int rtnl_bridge_notify(struct net_device *dev) 4848 { 4849 struct net *net = dev_net(dev); 4850 struct sk_buff *skb; 4851 int err = -EOPNOTSUPP; 4852 4853 if (!dev->netdev_ops->ndo_bridge_getlink) 4854 return 0; 4855 4856 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 4857 if (!skb) { 4858 err = -ENOMEM; 4859 goto errout; 4860 } 4861 4862 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 4863 if (err < 0) 4864 goto errout; 4865 4866 /* Notification info is only filled for bridge ports, not the bridge 4867 * device itself. Therefore, a zero notification length is valid and 4868 * should not result in an error. 4869 */ 4870 if (!skb->len) 4871 goto errout; 4872 4873 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 4874 return 0; 4875 errout: 4876 WARN_ON(err == -EMSGSIZE); 4877 kfree_skb(skb); 4878 if (err) 4879 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 4880 return err; 4881 } 4882 4883 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 4884 struct netlink_ext_ack *extack) 4885 { 4886 struct net *net = sock_net(skb->sk); 4887 struct ifinfomsg *ifm; 4888 struct net_device *dev; 4889 struct nlattr *br_spec, *attr = NULL; 4890 int rem, err = -EOPNOTSUPP; 4891 u16 flags = 0; 4892 bool have_flags = false; 4893 4894 if (nlmsg_len(nlh) < sizeof(*ifm)) 4895 return -EINVAL; 4896 4897 ifm = nlmsg_data(nlh); 4898 if (ifm->ifi_family != AF_BRIDGE) 4899 return -EPFNOSUPPORT; 4900 4901 dev = __dev_get_by_index(net, ifm->ifi_index); 4902 if (!dev) { 4903 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4904 return -ENODEV; 4905 } 4906 4907 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 4908 if (br_spec) { 4909 nla_for_each_nested(attr, br_spec, rem) { 4910 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 4911 if (nla_len(attr) < sizeof(flags)) 4912 return -EINVAL; 4913 4914 have_flags = true; 4915 flags = nla_get_u16(attr); 4916 break; 4917 } 4918 } 4919 } 4920 4921 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 4922 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4923 4924 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 4925 err = -EOPNOTSUPP; 4926 goto out; 4927 } 4928 4929 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags, 4930 extack); 4931 if (err) 4932 goto out; 4933 4934 flags &= ~BRIDGE_FLAGS_MASTER; 4935 } 4936 4937 if ((flags & BRIDGE_FLAGS_SELF)) { 4938 if (!dev->netdev_ops->ndo_bridge_setlink) 4939 err = -EOPNOTSUPP; 4940 else 4941 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 4942 flags, 4943 extack); 4944 if (!err) { 4945 flags &= ~BRIDGE_FLAGS_SELF; 4946 4947 /* Generate event to notify upper layer of bridge 4948 * change 4949 */ 4950 err = rtnl_bridge_notify(dev); 4951 } 4952 } 4953 4954 if (have_flags) 4955 memcpy(nla_data(attr), &flags, sizeof(flags)); 4956 out: 4957 return err; 4958 } 4959 4960 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 4961 struct netlink_ext_ack *extack) 4962 { 4963 struct net *net = sock_net(skb->sk); 4964 struct ifinfomsg *ifm; 4965 struct net_device *dev; 4966 struct nlattr *br_spec, *attr = NULL; 4967 int rem, err = -EOPNOTSUPP; 4968 u16 flags = 0; 4969 bool have_flags = false; 4970 4971 if (nlmsg_len(nlh) < sizeof(*ifm)) 4972 return -EINVAL; 4973 4974 ifm = nlmsg_data(nlh); 4975 if (ifm->ifi_family != AF_BRIDGE) 4976 return -EPFNOSUPPORT; 4977 4978 dev = __dev_get_by_index(net, ifm->ifi_index); 4979 if (!dev) { 4980 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4981 return -ENODEV; 4982 } 4983 4984 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 4985 if (br_spec) { 4986 nla_for_each_nested(attr, br_spec, rem) { 4987 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 4988 if (nla_len(attr) < sizeof(flags)) 4989 return -EINVAL; 4990 4991 have_flags = true; 4992 flags = nla_get_u16(attr); 4993 break; 4994 } 4995 } 4996 } 4997 4998 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 4999 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 5000 5001 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 5002 err = -EOPNOTSUPP; 5003 goto out; 5004 } 5005 5006 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 5007 if (err) 5008 goto out; 5009 5010 flags &= ~BRIDGE_FLAGS_MASTER; 5011 } 5012 5013 if ((flags & BRIDGE_FLAGS_SELF)) { 5014 if (!dev->netdev_ops->ndo_bridge_dellink) 5015 err = -EOPNOTSUPP; 5016 else 5017 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 5018 flags); 5019 5020 if (!err) { 5021 flags &= ~BRIDGE_FLAGS_SELF; 5022 5023 /* Generate event to notify upper layer of bridge 5024 * change 5025 */ 5026 err = rtnl_bridge_notify(dev); 5027 } 5028 } 5029 5030 if (have_flags) 5031 memcpy(nla_data(attr), &flags, sizeof(flags)); 5032 out: 5033 return err; 5034 } 5035 5036 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 5037 { 5038 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 5039 (!idxattr || idxattr == attrid); 5040 } 5041 5042 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 5043 static int rtnl_get_offload_stats_attr_size(int attr_id) 5044 { 5045 switch (attr_id) { 5046 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 5047 return sizeof(struct rtnl_link_stats64); 5048 } 5049 5050 return 0; 5051 } 5052 5053 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 5054 int *prividx) 5055 { 5056 struct nlattr *attr = NULL; 5057 int attr_id, size; 5058 void *attr_data; 5059 int err; 5060 5061 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 5062 dev->netdev_ops->ndo_get_offload_stats)) 5063 return -ENODATA; 5064 5065 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 5066 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 5067 if (attr_id < *prividx) 5068 continue; 5069 5070 size = rtnl_get_offload_stats_attr_size(attr_id); 5071 if (!size) 5072 continue; 5073 5074 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 5075 continue; 5076 5077 attr = nla_reserve_64bit(skb, attr_id, size, 5078 IFLA_OFFLOAD_XSTATS_UNSPEC); 5079 if (!attr) 5080 goto nla_put_failure; 5081 5082 attr_data = nla_data(attr); 5083 memset(attr_data, 0, size); 5084 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 5085 attr_data); 5086 if (err) 5087 goto get_offload_stats_failure; 5088 } 5089 5090 if (!attr) 5091 return -ENODATA; 5092 5093 *prividx = 0; 5094 return 0; 5095 5096 nla_put_failure: 5097 err = -EMSGSIZE; 5098 get_offload_stats_failure: 5099 *prividx = attr_id; 5100 return err; 5101 } 5102 5103 static int rtnl_get_offload_stats_size(const struct net_device *dev) 5104 { 5105 int nla_size = 0; 5106 int attr_id; 5107 int size; 5108 5109 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 5110 dev->netdev_ops->ndo_get_offload_stats)) 5111 return 0; 5112 5113 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 5114 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 5115 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 5116 continue; 5117 size = rtnl_get_offload_stats_attr_size(attr_id); 5118 nla_size += nla_total_size_64bit(size); 5119 } 5120 5121 if (nla_size != 0) 5122 nla_size += nla_total_size(0); 5123 5124 return nla_size; 5125 } 5126 5127 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 5128 int type, u32 pid, u32 seq, u32 change, 5129 unsigned int flags, unsigned int filter_mask, 5130 int *idxattr, int *prividx) 5131 { 5132 struct if_stats_msg *ifsm; 5133 struct nlmsghdr *nlh; 5134 struct nlattr *attr; 5135 int s_prividx = *prividx; 5136 int err; 5137 5138 ASSERT_RTNL(); 5139 5140 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 5141 if (!nlh) 5142 return -EMSGSIZE; 5143 5144 ifsm = nlmsg_data(nlh); 5145 ifsm->family = PF_UNSPEC; 5146 ifsm->pad1 = 0; 5147 ifsm->pad2 = 0; 5148 ifsm->ifindex = dev->ifindex; 5149 ifsm->filter_mask = filter_mask; 5150 5151 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 5152 struct rtnl_link_stats64 *sp; 5153 5154 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 5155 sizeof(struct rtnl_link_stats64), 5156 IFLA_STATS_UNSPEC); 5157 if (!attr) 5158 goto nla_put_failure; 5159 5160 sp = nla_data(attr); 5161 dev_get_stats(dev, sp); 5162 } 5163 5164 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 5165 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 5166 5167 if (ops && ops->fill_linkxstats) { 5168 *idxattr = IFLA_STATS_LINK_XSTATS; 5169 attr = nla_nest_start_noflag(skb, 5170 IFLA_STATS_LINK_XSTATS); 5171 if (!attr) 5172 goto nla_put_failure; 5173 5174 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 5175 nla_nest_end(skb, attr); 5176 if (err) 5177 goto nla_put_failure; 5178 *idxattr = 0; 5179 } 5180 } 5181 5182 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 5183 *idxattr)) { 5184 const struct rtnl_link_ops *ops = NULL; 5185 const struct net_device *master; 5186 5187 master = netdev_master_upper_dev_get(dev); 5188 if (master) 5189 ops = master->rtnl_link_ops; 5190 if (ops && ops->fill_linkxstats) { 5191 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 5192 attr = nla_nest_start_noflag(skb, 5193 IFLA_STATS_LINK_XSTATS_SLAVE); 5194 if (!attr) 5195 goto nla_put_failure; 5196 5197 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 5198 nla_nest_end(skb, attr); 5199 if (err) 5200 goto nla_put_failure; 5201 *idxattr = 0; 5202 } 5203 } 5204 5205 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 5206 *idxattr)) { 5207 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 5208 attr = nla_nest_start_noflag(skb, 5209 IFLA_STATS_LINK_OFFLOAD_XSTATS); 5210 if (!attr) 5211 goto nla_put_failure; 5212 5213 err = rtnl_get_offload_stats(skb, dev, prividx); 5214 if (err == -ENODATA) 5215 nla_nest_cancel(skb, attr); 5216 else 5217 nla_nest_end(skb, attr); 5218 5219 if (err && err != -ENODATA) 5220 goto nla_put_failure; 5221 *idxattr = 0; 5222 } 5223 5224 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 5225 struct rtnl_af_ops *af_ops; 5226 5227 *idxattr = IFLA_STATS_AF_SPEC; 5228 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC); 5229 if (!attr) 5230 goto nla_put_failure; 5231 5232 rcu_read_lock(); 5233 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 5234 if (af_ops->fill_stats_af) { 5235 struct nlattr *af; 5236 int err; 5237 5238 af = nla_nest_start_noflag(skb, 5239 af_ops->family); 5240 if (!af) { 5241 rcu_read_unlock(); 5242 goto nla_put_failure; 5243 } 5244 err = af_ops->fill_stats_af(skb, dev); 5245 5246 if (err == -ENODATA) { 5247 nla_nest_cancel(skb, af); 5248 } else if (err < 0) { 5249 rcu_read_unlock(); 5250 goto nla_put_failure; 5251 } 5252 5253 nla_nest_end(skb, af); 5254 } 5255 } 5256 rcu_read_unlock(); 5257 5258 nla_nest_end(skb, attr); 5259 5260 *idxattr = 0; 5261 } 5262 5263 nlmsg_end(skb, nlh); 5264 5265 return 0; 5266 5267 nla_put_failure: 5268 /* not a multi message or no progress mean a real error */ 5269 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 5270 nlmsg_cancel(skb, nlh); 5271 else 5272 nlmsg_end(skb, nlh); 5273 5274 return -EMSGSIZE; 5275 } 5276 5277 static size_t if_nlmsg_stats_size(const struct net_device *dev, 5278 u32 filter_mask) 5279 { 5280 size_t size = NLMSG_ALIGN(sizeof(struct if_stats_msg)); 5281 5282 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 5283 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 5284 5285 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 5286 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 5287 int attr = IFLA_STATS_LINK_XSTATS; 5288 5289 if (ops && ops->get_linkxstats_size) { 5290 size += nla_total_size(ops->get_linkxstats_size(dev, 5291 attr)); 5292 /* for IFLA_STATS_LINK_XSTATS */ 5293 size += nla_total_size(0); 5294 } 5295 } 5296 5297 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 5298 struct net_device *_dev = (struct net_device *)dev; 5299 const struct rtnl_link_ops *ops = NULL; 5300 const struct net_device *master; 5301 5302 /* netdev_master_upper_dev_get can't take const */ 5303 master = netdev_master_upper_dev_get(_dev); 5304 if (master) 5305 ops = master->rtnl_link_ops; 5306 if (ops && ops->get_linkxstats_size) { 5307 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 5308 5309 size += nla_total_size(ops->get_linkxstats_size(dev, 5310 attr)); 5311 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 5312 size += nla_total_size(0); 5313 } 5314 } 5315 5316 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 5317 size += rtnl_get_offload_stats_size(dev); 5318 5319 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 5320 struct rtnl_af_ops *af_ops; 5321 5322 /* for IFLA_STATS_AF_SPEC */ 5323 size += nla_total_size(0); 5324 5325 rcu_read_lock(); 5326 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 5327 if (af_ops->get_stats_af_size) { 5328 size += nla_total_size( 5329 af_ops->get_stats_af_size(dev)); 5330 5331 /* for AF_* */ 5332 size += nla_total_size(0); 5333 } 5334 } 5335 rcu_read_unlock(); 5336 } 5337 5338 return size; 5339 } 5340 5341 static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check, 5342 bool is_dump, struct netlink_ext_ack *extack) 5343 { 5344 struct if_stats_msg *ifsm; 5345 5346 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) { 5347 NL_SET_ERR_MSG(extack, "Invalid header for stats dump"); 5348 return -EINVAL; 5349 } 5350 5351 if (!strict_check) 5352 return 0; 5353 5354 ifsm = nlmsg_data(nlh); 5355 5356 /* only requests using strict checks can pass data to influence 5357 * the dump. The legacy exception is filter_mask. 5358 */ 5359 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) { 5360 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request"); 5361 return -EINVAL; 5362 } 5363 if (nlmsg_attrlen(nlh, sizeof(*ifsm))) { 5364 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header"); 5365 return -EINVAL; 5366 } 5367 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) { 5368 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask"); 5369 return -EINVAL; 5370 } 5371 5372 return 0; 5373 } 5374 5375 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, 5376 struct netlink_ext_ack *extack) 5377 { 5378 struct net *net = sock_net(skb->sk); 5379 struct net_device *dev = NULL; 5380 int idxattr = 0, prividx = 0; 5381 struct if_stats_msg *ifsm; 5382 struct sk_buff *nskb; 5383 u32 filter_mask; 5384 int err; 5385 5386 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb), 5387 false, extack); 5388 if (err) 5389 return err; 5390 5391 ifsm = nlmsg_data(nlh); 5392 if (ifsm->ifindex > 0) 5393 dev = __dev_get_by_index(net, ifsm->ifindex); 5394 else 5395 return -EINVAL; 5396 5397 if (!dev) 5398 return -ENODEV; 5399 5400 filter_mask = ifsm->filter_mask; 5401 if (!filter_mask) 5402 return -EINVAL; 5403 5404 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 5405 if (!nskb) 5406 return -ENOBUFS; 5407 5408 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 5409 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 5410 0, filter_mask, &idxattr, &prividx); 5411 if (err < 0) { 5412 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 5413 WARN_ON(err == -EMSGSIZE); 5414 kfree_skb(nskb); 5415 } else { 5416 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 5417 } 5418 5419 return err; 5420 } 5421 5422 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 5423 { 5424 struct netlink_ext_ack *extack = cb->extack; 5425 int h, s_h, err, s_idx, s_idxattr, s_prividx; 5426 struct net *net = sock_net(skb->sk); 5427 unsigned int flags = NLM_F_MULTI; 5428 struct if_stats_msg *ifsm; 5429 struct hlist_head *head; 5430 struct net_device *dev; 5431 u32 filter_mask = 0; 5432 int idx = 0; 5433 5434 s_h = cb->args[0]; 5435 s_idx = cb->args[1]; 5436 s_idxattr = cb->args[2]; 5437 s_prividx = cb->args[3]; 5438 5439 cb->seq = net->dev_base_seq; 5440 5441 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack); 5442 if (err) 5443 return err; 5444 5445 ifsm = nlmsg_data(cb->nlh); 5446 filter_mask = ifsm->filter_mask; 5447 if (!filter_mask) { 5448 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump"); 5449 return -EINVAL; 5450 } 5451 5452 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 5453 idx = 0; 5454 head = &net->dev_index_head[h]; 5455 hlist_for_each_entry(dev, head, index_hlist) { 5456 if (idx < s_idx) 5457 goto cont; 5458 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 5459 NETLINK_CB(cb->skb).portid, 5460 cb->nlh->nlmsg_seq, 0, 5461 flags, filter_mask, 5462 &s_idxattr, &s_prividx); 5463 /* If we ran out of room on the first message, 5464 * we're in trouble 5465 */ 5466 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 5467 5468 if (err < 0) 5469 goto out; 5470 s_prividx = 0; 5471 s_idxattr = 0; 5472 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 5473 cont: 5474 idx++; 5475 } 5476 } 5477 out: 5478 cb->args[3] = s_prividx; 5479 cb->args[2] = s_idxattr; 5480 cb->args[1] = idx; 5481 cb->args[0] = h; 5482 5483 return skb->len; 5484 } 5485 5486 /* Process one rtnetlink message. */ 5487 5488 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 5489 struct netlink_ext_ack *extack) 5490 { 5491 struct net *net = sock_net(skb->sk); 5492 struct rtnl_link *link; 5493 struct module *owner; 5494 int err = -EOPNOTSUPP; 5495 rtnl_doit_func doit; 5496 unsigned int flags; 5497 int kind; 5498 int family; 5499 int type; 5500 5501 type = nlh->nlmsg_type; 5502 if (type > RTM_MAX) 5503 return -EOPNOTSUPP; 5504 5505 type -= RTM_BASE; 5506 5507 /* All the messages must have at least 1 byte length */ 5508 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 5509 return 0; 5510 5511 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 5512 kind = type&3; 5513 5514 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 5515 return -EPERM; 5516 5517 rcu_read_lock(); 5518 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 5519 struct sock *rtnl; 5520 rtnl_dumpit_func dumpit; 5521 u32 min_dump_alloc = 0; 5522 5523 link = rtnl_get_link(family, type); 5524 if (!link || !link->dumpit) { 5525 family = PF_UNSPEC; 5526 link = rtnl_get_link(family, type); 5527 if (!link || !link->dumpit) 5528 goto err_unlock; 5529 } 5530 owner = link->owner; 5531 dumpit = link->dumpit; 5532 5533 if (type == RTM_GETLINK - RTM_BASE) 5534 min_dump_alloc = rtnl_calcit(skb, nlh); 5535 5536 err = 0; 5537 /* need to do this before rcu_read_unlock() */ 5538 if (!try_module_get(owner)) 5539 err = -EPROTONOSUPPORT; 5540 5541 rcu_read_unlock(); 5542 5543 rtnl = net->rtnl; 5544 if (err == 0) { 5545 struct netlink_dump_control c = { 5546 .dump = dumpit, 5547 .min_dump_alloc = min_dump_alloc, 5548 .module = owner, 5549 }; 5550 err = netlink_dump_start(rtnl, skb, nlh, &c); 5551 /* netlink_dump_start() will keep a reference on 5552 * module if dump is still in progress. 5553 */ 5554 module_put(owner); 5555 } 5556 return err; 5557 } 5558 5559 link = rtnl_get_link(family, type); 5560 if (!link || !link->doit) { 5561 family = PF_UNSPEC; 5562 link = rtnl_get_link(PF_UNSPEC, type); 5563 if (!link || !link->doit) 5564 goto out_unlock; 5565 } 5566 5567 owner = link->owner; 5568 if (!try_module_get(owner)) { 5569 err = -EPROTONOSUPPORT; 5570 goto out_unlock; 5571 } 5572 5573 flags = link->flags; 5574 if (flags & RTNL_FLAG_DOIT_UNLOCKED) { 5575 doit = link->doit; 5576 rcu_read_unlock(); 5577 if (doit) 5578 err = doit(skb, nlh, extack); 5579 module_put(owner); 5580 return err; 5581 } 5582 rcu_read_unlock(); 5583 5584 rtnl_lock(); 5585 link = rtnl_get_link(family, type); 5586 if (link && link->doit) 5587 err = link->doit(skb, nlh, extack); 5588 rtnl_unlock(); 5589 5590 module_put(owner); 5591 5592 return err; 5593 5594 out_unlock: 5595 rcu_read_unlock(); 5596 return err; 5597 5598 err_unlock: 5599 rcu_read_unlock(); 5600 return -EOPNOTSUPP; 5601 } 5602 5603 static void rtnetlink_rcv(struct sk_buff *skb) 5604 { 5605 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 5606 } 5607 5608 static int rtnetlink_bind(struct net *net, int group) 5609 { 5610 switch (group) { 5611 case RTNLGRP_IPV4_MROUTE_R: 5612 case RTNLGRP_IPV6_MROUTE_R: 5613 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 5614 return -EPERM; 5615 break; 5616 } 5617 return 0; 5618 } 5619 5620 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 5621 { 5622 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 5623 5624 switch (event) { 5625 case NETDEV_REBOOT: 5626 case NETDEV_CHANGEMTU: 5627 case NETDEV_CHANGEADDR: 5628 case NETDEV_CHANGENAME: 5629 case NETDEV_FEAT_CHANGE: 5630 case NETDEV_BONDING_FAILOVER: 5631 case NETDEV_POST_TYPE_CHANGE: 5632 case NETDEV_NOTIFY_PEERS: 5633 case NETDEV_CHANGEUPPER: 5634 case NETDEV_RESEND_IGMP: 5635 case NETDEV_CHANGEINFODATA: 5636 case NETDEV_CHANGELOWERSTATE: 5637 case NETDEV_CHANGE_TX_QUEUE_LEN: 5638 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), 5639 GFP_KERNEL, NULL, 0); 5640 break; 5641 default: 5642 break; 5643 } 5644 return NOTIFY_DONE; 5645 } 5646 5647 static struct notifier_block rtnetlink_dev_notifier = { 5648 .notifier_call = rtnetlink_event, 5649 }; 5650 5651 5652 static int __net_init rtnetlink_net_init(struct net *net) 5653 { 5654 struct sock *sk; 5655 struct netlink_kernel_cfg cfg = { 5656 .groups = RTNLGRP_MAX, 5657 .input = rtnetlink_rcv, 5658 .cb_mutex = &rtnl_mutex, 5659 .flags = NL_CFG_F_NONROOT_RECV, 5660 .bind = rtnetlink_bind, 5661 }; 5662 5663 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 5664 if (!sk) 5665 return -ENOMEM; 5666 net->rtnl = sk; 5667 return 0; 5668 } 5669 5670 static void __net_exit rtnetlink_net_exit(struct net *net) 5671 { 5672 netlink_kernel_release(net->rtnl); 5673 net->rtnl = NULL; 5674 } 5675 5676 static struct pernet_operations rtnetlink_net_ops = { 5677 .init = rtnetlink_net_init, 5678 .exit = rtnetlink_net_exit, 5679 }; 5680 5681 void __init rtnetlink_init(void) 5682 { 5683 if (register_pernet_subsys(&rtnetlink_net_ops)) 5684 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 5685 5686 register_netdevice_notifier(&rtnetlink_dev_notifier); 5687 5688 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 5689 rtnl_dump_ifinfo, 0); 5690 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0); 5691 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0); 5692 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0); 5693 5694 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0); 5695 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); 5696 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); 5697 5698 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0); 5699 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0); 5700 5701 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); 5702 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0); 5703 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0); 5704 5705 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0); 5706 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0); 5707 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0); 5708 5709 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 5710 0); 5711 } 5712