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