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