1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * INET An implementation of the TCP/IP protocol suite for the LINUX 4 * operating system. INET is implemented using the BSD Socket 5 * interface as the means of communication with the user level. 6 * 7 * Routing netlink socket interface: protocol independent part. 8 * 9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 10 * 11 * Fixes: 12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong. 13 */ 14 15 #include <linux/bitops.h> 16 #include <linux/errno.h> 17 #include <linux/module.h> 18 #include <linux/types.h> 19 #include <linux/socket.h> 20 #include <linux/kernel.h> 21 #include <linux/timer.h> 22 #include <linux/string.h> 23 #include <linux/sockios.h> 24 #include <linux/net.h> 25 #include <linux/fcntl.h> 26 #include <linux/mm.h> 27 #include <linux/slab.h> 28 #include <linux/interrupt.h> 29 #include <linux/capability.h> 30 #include <linux/skbuff.h> 31 #include <linux/init.h> 32 #include <linux/security.h> 33 #include <linux/mutex.h> 34 #include <linux/if_addr.h> 35 #include <linux/if_bridge.h> 36 #include <linux/if_vlan.h> 37 #include <linux/pci.h> 38 #include <linux/etherdevice.h> 39 #include <linux/bpf.h> 40 41 #include <linux/uaccess.h> 42 43 #include <linux/inet.h> 44 #include <linux/netdevice.h> 45 #include <net/ip.h> 46 #include <net/protocol.h> 47 #include <net/arp.h> 48 #include <net/route.h> 49 #include <net/udp.h> 50 #include <net/tcp.h> 51 #include <net/sock.h> 52 #include <net/pkt_sched.h> 53 #include <net/fib_rules.h> 54 #include <net/rtnetlink.h> 55 #include <net/net_namespace.h> 56 57 #define RTNL_MAX_TYPE 50 58 #define RTNL_SLAVE_MAX_TYPE 40 59 60 struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 struct module *owner; 64 unsigned int flags; 65 struct rcu_head rcu; 66 }; 67 68 static DEFINE_MUTEX(rtnl_mutex); 69 70 void rtnl_lock(void) 71 { 72 mutex_lock(&rtnl_mutex); 73 } 74 EXPORT_SYMBOL(rtnl_lock); 75 76 int rtnl_lock_killable(void) 77 { 78 return mutex_lock_killable(&rtnl_mutex); 79 } 80 EXPORT_SYMBOL(rtnl_lock_killable); 81 82 static struct sk_buff *defer_kfree_skb_list; 83 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) 84 { 85 if (head && tail) { 86 tail->next = defer_kfree_skb_list; 87 defer_kfree_skb_list = head; 88 } 89 } 90 EXPORT_SYMBOL(rtnl_kfree_skbs); 91 92 void __rtnl_unlock(void) 93 { 94 struct sk_buff *head = defer_kfree_skb_list; 95 96 defer_kfree_skb_list = NULL; 97 98 mutex_unlock(&rtnl_mutex); 99 100 while (head) { 101 struct sk_buff *next = head->next; 102 103 kfree_skb(head); 104 cond_resched(); 105 head = next; 106 } 107 } 108 109 void rtnl_unlock(void) 110 { 111 /* This fellow will unlock it for us. */ 112 netdev_run_todo(); 113 } 114 EXPORT_SYMBOL(rtnl_unlock); 115 116 int rtnl_trylock(void) 117 { 118 return mutex_trylock(&rtnl_mutex); 119 } 120 EXPORT_SYMBOL(rtnl_trylock); 121 122 int rtnl_is_locked(void) 123 { 124 return mutex_is_locked(&rtnl_mutex); 125 } 126 EXPORT_SYMBOL(rtnl_is_locked); 127 128 bool refcount_dec_and_rtnl_lock(refcount_t *r) 129 { 130 return refcount_dec_and_mutex_lock(r, &rtnl_mutex); 131 } 132 EXPORT_SYMBOL(refcount_dec_and_rtnl_lock); 133 134 #ifdef CONFIG_PROVE_LOCKING 135 bool lockdep_rtnl_is_held(void) 136 { 137 return lockdep_is_held(&rtnl_mutex); 138 } 139 EXPORT_SYMBOL(lockdep_rtnl_is_held); 140 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 141 142 static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 143 144 static inline int rtm_msgindex(int msgtype) 145 { 146 int msgindex = msgtype - RTM_BASE; 147 148 /* 149 * msgindex < 0 implies someone tried to register a netlink 150 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 151 * the message type has not been added to linux/rtnetlink.h 152 */ 153 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 154 155 return msgindex; 156 } 157 158 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype) 159 { 160 struct rtnl_link __rcu **tab; 161 162 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers)) 163 protocol = PF_UNSPEC; 164 165 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]); 166 if (!tab) 167 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]); 168 169 return rcu_dereference_rtnl(tab[msgtype]); 170 } 171 172 static int rtnl_register_internal(struct module *owner, 173 int protocol, int msgtype, 174 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 175 unsigned int flags) 176 { 177 struct rtnl_link *link, *old; 178 struct rtnl_link __rcu **tab; 179 int msgindex; 180 int ret = -ENOBUFS; 181 182 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 183 msgindex = rtm_msgindex(msgtype); 184 185 rtnl_lock(); 186 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 187 if (tab == NULL) { 188 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL); 189 if (!tab) 190 goto unlock; 191 192 /* ensures we see the 0 stores */ 193 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab); 194 } 195 196 old = rtnl_dereference(tab[msgindex]); 197 if (old) { 198 link = kmemdup(old, sizeof(*old), GFP_KERNEL); 199 if (!link) 200 goto unlock; 201 } else { 202 link = kzalloc(sizeof(*link), GFP_KERNEL); 203 if (!link) 204 goto unlock; 205 } 206 207 WARN_ON(link->owner && link->owner != owner); 208 link->owner = owner; 209 210 WARN_ON(doit && link->doit && link->doit != doit); 211 if (doit) 212 link->doit = doit; 213 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit); 214 if (dumpit) 215 link->dumpit = dumpit; 216 217 link->flags |= flags; 218 219 /* publish protocol:msgtype */ 220 rcu_assign_pointer(tab[msgindex], link); 221 ret = 0; 222 if (old) 223 kfree_rcu(old, rcu); 224 unlock: 225 rtnl_unlock(); 226 return ret; 227 } 228 229 /** 230 * rtnl_register_module - Register a rtnetlink message type 231 * 232 * @owner: module registering the hook (THIS_MODULE) 233 * @protocol: Protocol family or PF_UNSPEC 234 * @msgtype: rtnetlink message type 235 * @doit: Function pointer called for each request message 236 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 237 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions 238 * 239 * Like rtnl_register, but for use by removable modules. 240 */ 241 int rtnl_register_module(struct module *owner, 242 int protocol, int msgtype, 243 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 244 unsigned int flags) 245 { 246 return rtnl_register_internal(owner, protocol, msgtype, 247 doit, dumpit, flags); 248 } 249 EXPORT_SYMBOL_GPL(rtnl_register_module); 250 251 /** 252 * rtnl_register - Register a rtnetlink message type 253 * @protocol: Protocol family or PF_UNSPEC 254 * @msgtype: rtnetlink message type 255 * @doit: Function pointer called for each request message 256 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 257 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions 258 * 259 * Registers the specified function pointers (at least one of them has 260 * to be non-NULL) to be called whenever a request message for the 261 * specified protocol family and message type is received. 262 * 263 * The special protocol family PF_UNSPEC may be used to define fallback 264 * function pointers for the case when no entry for the specific protocol 265 * family exists. 266 */ 267 void rtnl_register(int protocol, int msgtype, 268 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 269 unsigned int flags) 270 { 271 int err; 272 273 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit, 274 flags); 275 if (err) 276 pr_err("Unable to register rtnetlink message handler, " 277 "protocol = %d, message type = %d\n", protocol, msgtype); 278 } 279 280 /** 281 * rtnl_unregister - Unregister a rtnetlink message type 282 * @protocol: Protocol family or PF_UNSPEC 283 * @msgtype: rtnetlink message type 284 * 285 * Returns 0 on success or a negative error code. 286 */ 287 int rtnl_unregister(int protocol, int msgtype) 288 { 289 struct rtnl_link __rcu **tab; 290 struct rtnl_link *link; 291 int msgindex; 292 293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 294 msgindex = rtm_msgindex(msgtype); 295 296 rtnl_lock(); 297 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 298 if (!tab) { 299 rtnl_unlock(); 300 return -ENOENT; 301 } 302 303 link = rtnl_dereference(tab[msgindex]); 304 rcu_assign_pointer(tab[msgindex], NULL); 305 rtnl_unlock(); 306 307 kfree_rcu(link, rcu); 308 309 return 0; 310 } 311 EXPORT_SYMBOL_GPL(rtnl_unregister); 312 313 /** 314 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 315 * @protocol : Protocol family or PF_UNSPEC 316 * 317 * Identical to calling rtnl_unregster() for all registered message types 318 * of a certain protocol family. 319 */ 320 void rtnl_unregister_all(int protocol) 321 { 322 struct rtnl_link __rcu **tab; 323 struct rtnl_link *link; 324 int msgindex; 325 326 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 327 328 rtnl_lock(); 329 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 330 if (!tab) { 331 rtnl_unlock(); 332 return; 333 } 334 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL); 335 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) { 336 link = rtnl_dereference(tab[msgindex]); 337 if (!link) 338 continue; 339 340 rcu_assign_pointer(tab[msgindex], NULL); 341 kfree_rcu(link, rcu); 342 } 343 rtnl_unlock(); 344 345 synchronize_net(); 346 347 kfree(tab); 348 } 349 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 350 351 static LIST_HEAD(link_ops); 352 353 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 354 { 355 const struct rtnl_link_ops *ops; 356 357 list_for_each_entry(ops, &link_ops, list) { 358 if (!strcmp(ops->kind, kind)) 359 return ops; 360 } 361 return NULL; 362 } 363 364 /** 365 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 366 * @ops: struct rtnl_link_ops * to register 367 * 368 * The caller must hold the rtnl_mutex. This function should be used 369 * by drivers that create devices during module initialization. It 370 * must be called before registering the devices. 371 * 372 * Returns 0 on success or a negative error code. 373 */ 374 int __rtnl_link_register(struct rtnl_link_ops *ops) 375 { 376 if (rtnl_link_ops_get(ops->kind)) 377 return -EEXIST; 378 379 /* The check for alloc/setup is here because if ops 380 * does not have that filled up, it is not possible 381 * to use the ops for creating device. So do not 382 * fill up dellink as well. That disables rtnl_dellink. 383 */ 384 if ((ops->alloc || ops->setup) && !ops->dellink) 385 ops->dellink = unregister_netdevice_queue; 386 387 list_add_tail(&ops->list, &link_ops); 388 return 0; 389 } 390 EXPORT_SYMBOL_GPL(__rtnl_link_register); 391 392 /** 393 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 394 * @ops: struct rtnl_link_ops * to register 395 * 396 * Returns 0 on success or a negative error code. 397 */ 398 int rtnl_link_register(struct rtnl_link_ops *ops) 399 { 400 int err; 401 402 /* Sanity-check max sizes to avoid stack buffer overflow. */ 403 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE || 404 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)) 405 return -EINVAL; 406 407 rtnl_lock(); 408 err = __rtnl_link_register(ops); 409 rtnl_unlock(); 410 return err; 411 } 412 EXPORT_SYMBOL_GPL(rtnl_link_register); 413 414 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 415 { 416 struct net_device *dev; 417 LIST_HEAD(list_kill); 418 419 for_each_netdev(net, dev) { 420 if (dev->rtnl_link_ops == ops) 421 ops->dellink(dev, &list_kill); 422 } 423 unregister_netdevice_many(&list_kill); 424 } 425 426 /** 427 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 428 * @ops: struct rtnl_link_ops * to unregister 429 * 430 * The caller must hold the rtnl_mutex and guarantee net_namespace_list 431 * integrity (hold pernet_ops_rwsem for writing to close the race 432 * with setup_net() and cleanup_net()). 433 */ 434 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 435 { 436 struct net *net; 437 438 for_each_net(net) { 439 __rtnl_kill_links(net, ops); 440 } 441 list_del(&ops->list); 442 } 443 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 444 445 /* Return with the rtnl_lock held when there are no network 446 * devices unregistering in any network namespace. 447 */ 448 static void rtnl_lock_unregistering_all(void) 449 { 450 struct net *net; 451 bool unregistering; 452 DEFINE_WAIT_FUNC(wait, woken_wake_function); 453 454 add_wait_queue(&netdev_unregistering_wq, &wait); 455 for (;;) { 456 unregistering = false; 457 rtnl_lock(); 458 /* We held write locked pernet_ops_rwsem, and parallel 459 * setup_net() and cleanup_net() are not possible. 460 */ 461 for_each_net(net) { 462 if (net->dev_unreg_count > 0) { 463 unregistering = true; 464 break; 465 } 466 } 467 if (!unregistering) 468 break; 469 __rtnl_unlock(); 470 471 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 472 } 473 remove_wait_queue(&netdev_unregistering_wq, &wait); 474 } 475 476 /** 477 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 478 * @ops: struct rtnl_link_ops * to unregister 479 */ 480 void rtnl_link_unregister(struct rtnl_link_ops *ops) 481 { 482 /* Close the race with setup_net() and cleanup_net() */ 483 down_write(&pernet_ops_rwsem); 484 rtnl_lock_unregistering_all(); 485 __rtnl_link_unregister(ops); 486 rtnl_unlock(); 487 up_write(&pernet_ops_rwsem); 488 } 489 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 490 491 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 492 { 493 struct net_device *master_dev; 494 const struct rtnl_link_ops *ops; 495 size_t size = 0; 496 497 rcu_read_lock(); 498 499 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 500 if (!master_dev) 501 goto out; 502 503 ops = master_dev->rtnl_link_ops; 504 if (!ops || !ops->get_slave_size) 505 goto out; 506 /* IFLA_INFO_SLAVE_DATA + nested data */ 507 size = nla_total_size(sizeof(struct nlattr)) + 508 ops->get_slave_size(master_dev, dev); 509 510 out: 511 rcu_read_unlock(); 512 return size; 513 } 514 515 static size_t rtnl_link_get_size(const struct net_device *dev) 516 { 517 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 518 size_t size; 519 520 if (!ops) 521 return 0; 522 523 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 524 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 525 526 if (ops->get_size) 527 /* IFLA_INFO_DATA + nested data */ 528 size += nla_total_size(sizeof(struct nlattr)) + 529 ops->get_size(dev); 530 531 if (ops->get_xstats_size) 532 /* IFLA_INFO_XSTATS */ 533 size += nla_total_size(ops->get_xstats_size(dev)); 534 535 size += rtnl_link_get_slave_info_data_size(dev); 536 537 return size; 538 } 539 540 static LIST_HEAD(rtnl_af_ops); 541 542 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 543 { 544 const struct rtnl_af_ops *ops; 545 546 ASSERT_RTNL(); 547 548 list_for_each_entry(ops, &rtnl_af_ops, list) { 549 if (ops->family == family) 550 return ops; 551 } 552 553 return NULL; 554 } 555 556 /** 557 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 558 * @ops: struct rtnl_af_ops * to register 559 * 560 * Returns 0 on success or a negative error code. 561 */ 562 void rtnl_af_register(struct rtnl_af_ops *ops) 563 { 564 rtnl_lock(); 565 list_add_tail_rcu(&ops->list, &rtnl_af_ops); 566 rtnl_unlock(); 567 } 568 EXPORT_SYMBOL_GPL(rtnl_af_register); 569 570 /** 571 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 572 * @ops: struct rtnl_af_ops * to unregister 573 */ 574 void rtnl_af_unregister(struct rtnl_af_ops *ops) 575 { 576 rtnl_lock(); 577 list_del_rcu(&ops->list); 578 rtnl_unlock(); 579 580 synchronize_rcu(); 581 } 582 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 583 584 static size_t rtnl_link_get_af_size(const struct net_device *dev, 585 u32 ext_filter_mask) 586 { 587 struct rtnl_af_ops *af_ops; 588 size_t size; 589 590 /* IFLA_AF_SPEC */ 591 size = nla_total_size(sizeof(struct nlattr)); 592 593 rcu_read_lock(); 594 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 595 if (af_ops->get_link_af_size) { 596 /* AF_* + nested data */ 597 size += nla_total_size(sizeof(struct nlattr)) + 598 af_ops->get_link_af_size(dev, ext_filter_mask); 599 } 600 } 601 rcu_read_unlock(); 602 603 return size; 604 } 605 606 static bool rtnl_have_link_slave_info(const struct net_device *dev) 607 { 608 struct net_device *master_dev; 609 bool ret = false; 610 611 rcu_read_lock(); 612 613 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 614 if (master_dev && master_dev->rtnl_link_ops) 615 ret = true; 616 rcu_read_unlock(); 617 return ret; 618 } 619 620 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 621 const struct net_device *dev) 622 { 623 struct net_device *master_dev; 624 const struct rtnl_link_ops *ops; 625 struct nlattr *slave_data; 626 int err; 627 628 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 629 if (!master_dev) 630 return 0; 631 ops = master_dev->rtnl_link_ops; 632 if (!ops) 633 return 0; 634 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 635 return -EMSGSIZE; 636 if (ops->fill_slave_info) { 637 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA); 638 if (!slave_data) 639 return -EMSGSIZE; 640 err = ops->fill_slave_info(skb, master_dev, dev); 641 if (err < 0) 642 goto err_cancel_slave_data; 643 nla_nest_end(skb, slave_data); 644 } 645 return 0; 646 647 err_cancel_slave_data: 648 nla_nest_cancel(skb, slave_data); 649 return err; 650 } 651 652 static int rtnl_link_info_fill(struct sk_buff *skb, 653 const struct net_device *dev) 654 { 655 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 656 struct nlattr *data; 657 int err; 658 659 if (!ops) 660 return 0; 661 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 662 return -EMSGSIZE; 663 if (ops->fill_xstats) { 664 err = ops->fill_xstats(skb, dev); 665 if (err < 0) 666 return err; 667 } 668 if (ops->fill_info) { 669 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA); 670 if (data == NULL) 671 return -EMSGSIZE; 672 err = ops->fill_info(skb, dev); 673 if (err < 0) 674 goto err_cancel_data; 675 nla_nest_end(skb, data); 676 } 677 return 0; 678 679 err_cancel_data: 680 nla_nest_cancel(skb, data); 681 return err; 682 } 683 684 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 685 { 686 struct nlattr *linkinfo; 687 int err = -EMSGSIZE; 688 689 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO); 690 if (linkinfo == NULL) 691 goto out; 692 693 err = rtnl_link_info_fill(skb, dev); 694 if (err < 0) 695 goto err_cancel_link; 696 697 err = rtnl_link_slave_info_fill(skb, dev); 698 if (err < 0) 699 goto err_cancel_link; 700 701 nla_nest_end(skb, linkinfo); 702 return 0; 703 704 err_cancel_link: 705 nla_nest_cancel(skb, linkinfo); 706 out: 707 return err; 708 } 709 710 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 711 { 712 struct sock *rtnl = net->rtnl; 713 714 return nlmsg_notify(rtnl, skb, pid, group, echo, GFP_KERNEL); 715 } 716 717 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 718 { 719 struct sock *rtnl = net->rtnl; 720 721 return nlmsg_unicast(rtnl, skb, pid); 722 } 723 EXPORT_SYMBOL(rtnl_unicast); 724 725 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 726 struct nlmsghdr *nlh, gfp_t flags) 727 { 728 struct sock *rtnl = net->rtnl; 729 730 nlmsg_notify(rtnl, skb, pid, group, nlmsg_report(nlh), flags); 731 } 732 EXPORT_SYMBOL(rtnl_notify); 733 734 void rtnl_set_sk_err(struct net *net, u32 group, int error) 735 { 736 struct sock *rtnl = net->rtnl; 737 738 netlink_set_err(rtnl, 0, group, error); 739 } 740 EXPORT_SYMBOL(rtnl_set_sk_err); 741 742 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 743 { 744 struct nlattr *mx; 745 int i, valid = 0; 746 747 /* nothing is dumped for dst_default_metrics, so just skip the loop */ 748 if (metrics == dst_default_metrics.metrics) 749 return 0; 750 751 mx = nla_nest_start_noflag(skb, RTA_METRICS); 752 if (mx == NULL) 753 return -ENOBUFS; 754 755 for (i = 0; i < RTAX_MAX; i++) { 756 if (metrics[i]) { 757 if (i == RTAX_CC_ALGO - 1) { 758 char tmp[TCP_CA_NAME_MAX], *name; 759 760 name = tcp_ca_get_name_by_key(metrics[i], tmp); 761 if (!name) 762 continue; 763 if (nla_put_string(skb, i + 1, name)) 764 goto nla_put_failure; 765 } else if (i == RTAX_FEATURES - 1) { 766 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 767 768 if (!user_features) 769 continue; 770 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 771 if (nla_put_u32(skb, i + 1, user_features)) 772 goto nla_put_failure; 773 } else { 774 if (nla_put_u32(skb, i + 1, metrics[i])) 775 goto nla_put_failure; 776 } 777 valid++; 778 } 779 } 780 781 if (!valid) { 782 nla_nest_cancel(skb, mx); 783 return 0; 784 } 785 786 return nla_nest_end(skb, mx); 787 788 nla_put_failure: 789 nla_nest_cancel(skb, mx); 790 return -EMSGSIZE; 791 } 792 EXPORT_SYMBOL(rtnetlink_put_metrics); 793 794 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 795 long expires, u32 error) 796 { 797 struct rta_cacheinfo ci = { 798 .rta_error = error, 799 .rta_id = id, 800 }; 801 802 if (dst) { 803 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse); 804 ci.rta_used = dst->__use; 805 ci.rta_clntref = atomic_read(&dst->__refcnt); 806 } 807 if (expires) { 808 unsigned long clock; 809 810 clock = jiffies_to_clock_t(abs(expires)); 811 clock = min_t(unsigned long, clock, INT_MAX); 812 ci.rta_expires = (expires > 0) ? clock : -clock; 813 } 814 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 815 } 816 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 817 818 static void set_operstate(struct net_device *dev, unsigned char transition) 819 { 820 unsigned char operstate = dev->operstate; 821 822 switch (transition) { 823 case IF_OPER_UP: 824 if ((operstate == IF_OPER_DORMANT || 825 operstate == IF_OPER_TESTING || 826 operstate == IF_OPER_UNKNOWN) && 827 !netif_dormant(dev) && !netif_testing(dev)) 828 operstate = IF_OPER_UP; 829 break; 830 831 case IF_OPER_TESTING: 832 if (operstate == IF_OPER_UP || 833 operstate == IF_OPER_UNKNOWN) 834 operstate = IF_OPER_TESTING; 835 break; 836 837 case IF_OPER_DORMANT: 838 if (operstate == IF_OPER_UP || 839 operstate == IF_OPER_UNKNOWN) 840 operstate = IF_OPER_DORMANT; 841 break; 842 } 843 844 if (dev->operstate != operstate) { 845 write_lock_bh(&dev_base_lock); 846 dev->operstate = operstate; 847 write_unlock_bh(&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 if (!master || master->ifindex != master_idx) 1963 return true; 1964 1965 return false; 1966 } 1967 1968 static bool link_kind_filtered(const struct net_device *dev, 1969 const struct rtnl_link_ops *kind_ops) 1970 { 1971 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1972 return true; 1973 1974 return false; 1975 } 1976 1977 static bool link_dump_filtered(struct net_device *dev, 1978 int master_idx, 1979 const struct rtnl_link_ops *kind_ops) 1980 { 1981 if (link_master_filtered(dev, master_idx) || 1982 link_kind_filtered(dev, kind_ops)) 1983 return true; 1984 1985 return false; 1986 } 1987 1988 /** 1989 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged. 1990 * @sk: netlink socket 1991 * @netnsid: network namespace identifier 1992 * 1993 * Returns the network namespace identified by netnsid on success or an error 1994 * pointer on failure. 1995 */ 1996 struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid) 1997 { 1998 struct net *net; 1999 2000 net = get_net_ns_by_id(sock_net(sk), netnsid); 2001 if (!net) 2002 return ERR_PTR(-EINVAL); 2003 2004 /* For now, the caller is required to have CAP_NET_ADMIN in 2005 * the user namespace owning the target net ns. 2006 */ 2007 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) { 2008 put_net(net); 2009 return ERR_PTR(-EACCES); 2010 } 2011 return net; 2012 } 2013 EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable); 2014 2015 static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh, 2016 bool strict_check, struct nlattr **tb, 2017 struct netlink_ext_ack *extack) 2018 { 2019 int hdrlen; 2020 2021 if (strict_check) { 2022 struct ifinfomsg *ifm; 2023 2024 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 2025 NL_SET_ERR_MSG(extack, "Invalid header for link dump"); 2026 return -EINVAL; 2027 } 2028 2029 ifm = nlmsg_data(nlh); 2030 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 2031 ifm->ifi_change) { 2032 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request"); 2033 return -EINVAL; 2034 } 2035 if (ifm->ifi_index) { 2036 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps"); 2037 return -EINVAL; 2038 } 2039 2040 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, 2041 IFLA_MAX, ifla_policy, 2042 extack); 2043 } 2044 2045 /* A hack to preserve kernel<->userspace interface. 2046 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 2047 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 2048 * what iproute2 < v3.9.0 used. 2049 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 2050 * attribute, its netlink message is shorter than struct ifinfomsg. 2051 */ 2052 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2053 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2054 2055 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, 2056 extack); 2057 } 2058 2059 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 2060 { 2061 struct netlink_ext_ack *extack = cb->extack; 2062 const struct nlmsghdr *nlh = cb->nlh; 2063 struct net *net = sock_net(skb->sk); 2064 struct net *tgt_net = net; 2065 int h, s_h; 2066 int idx = 0, s_idx; 2067 struct net_device *dev; 2068 struct hlist_head *head; 2069 struct nlattr *tb[IFLA_MAX+1]; 2070 u32 ext_filter_mask = 0; 2071 const struct rtnl_link_ops *kind_ops = NULL; 2072 unsigned int flags = NLM_F_MULTI; 2073 int master_idx = 0; 2074 int netnsid = -1; 2075 int err, i; 2076 2077 s_h = cb->args[0]; 2078 s_idx = cb->args[1]; 2079 2080 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack); 2081 if (err < 0) { 2082 if (cb->strict_check) 2083 return err; 2084 2085 goto walk_entries; 2086 } 2087 2088 for (i = 0; i <= IFLA_MAX; ++i) { 2089 if (!tb[i]) 2090 continue; 2091 2092 /* new attributes should only be added with strict checking */ 2093 switch (i) { 2094 case IFLA_TARGET_NETNSID: 2095 netnsid = nla_get_s32(tb[i]); 2096 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid); 2097 if (IS_ERR(tgt_net)) { 2098 NL_SET_ERR_MSG(extack, "Invalid target network namespace id"); 2099 return PTR_ERR(tgt_net); 2100 } 2101 break; 2102 case IFLA_EXT_MASK: 2103 ext_filter_mask = nla_get_u32(tb[i]); 2104 break; 2105 case IFLA_MASTER: 2106 master_idx = nla_get_u32(tb[i]); 2107 break; 2108 case IFLA_LINKINFO: 2109 kind_ops = linkinfo_to_kind_ops(tb[i]); 2110 break; 2111 default: 2112 if (cb->strict_check) { 2113 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request"); 2114 return -EINVAL; 2115 } 2116 } 2117 } 2118 2119 if (master_idx || kind_ops) 2120 flags |= NLM_F_DUMP_FILTERED; 2121 2122 walk_entries: 2123 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 2124 idx = 0; 2125 head = &tgt_net->dev_index_head[h]; 2126 hlist_for_each_entry(dev, head, index_hlist) { 2127 if (link_dump_filtered(dev, master_idx, kind_ops)) 2128 goto cont; 2129 if (idx < s_idx) 2130 goto cont; 2131 err = rtnl_fill_ifinfo(skb, dev, net, 2132 RTM_NEWLINK, 2133 NETLINK_CB(cb->skb).portid, 2134 nlh->nlmsg_seq, 0, flags, 2135 ext_filter_mask, 0, NULL, 0, 2136 netnsid, GFP_KERNEL); 2137 2138 if (err < 0) { 2139 if (likely(skb->len)) 2140 goto out; 2141 2142 goto out_err; 2143 } 2144 cont: 2145 idx++; 2146 } 2147 } 2148 out: 2149 err = skb->len; 2150 out_err: 2151 cb->args[1] = idx; 2152 cb->args[0] = h; 2153 cb->seq = tgt_net->dev_base_seq; 2154 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 2155 if (netnsid >= 0) 2156 put_net(tgt_net); 2157 2158 return err; 2159 } 2160 2161 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 2162 struct netlink_ext_ack *exterr) 2163 { 2164 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy, 2165 exterr); 2166 } 2167 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 2168 2169 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 2170 { 2171 struct net *net; 2172 /* Examine the link attributes and figure out which 2173 * network namespace we are talking about. 2174 */ 2175 if (tb[IFLA_NET_NS_PID]) 2176 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 2177 else if (tb[IFLA_NET_NS_FD]) 2178 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 2179 else 2180 net = get_net(src_net); 2181 return net; 2182 } 2183 EXPORT_SYMBOL(rtnl_link_get_net); 2184 2185 /* Figure out which network namespace we are talking about by 2186 * examining the link attributes in the following order: 2187 * 2188 * 1. IFLA_NET_NS_PID 2189 * 2. IFLA_NET_NS_FD 2190 * 3. IFLA_TARGET_NETNSID 2191 */ 2192 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net, 2193 struct nlattr *tb[]) 2194 { 2195 struct net *net; 2196 2197 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) 2198 return rtnl_link_get_net(src_net, tb); 2199 2200 if (!tb[IFLA_TARGET_NETNSID]) 2201 return get_net(src_net); 2202 2203 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID])); 2204 if (!net) 2205 return ERR_PTR(-EINVAL); 2206 2207 return net; 2208 } 2209 2210 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb, 2211 struct net *src_net, 2212 struct nlattr *tb[], int cap) 2213 { 2214 struct net *net; 2215 2216 net = rtnl_link_get_net_by_nlattr(src_net, tb); 2217 if (IS_ERR(net)) 2218 return net; 2219 2220 if (!netlink_ns_capable(skb, net->user_ns, cap)) { 2221 put_net(net); 2222 return ERR_PTR(-EPERM); 2223 } 2224 2225 return net; 2226 } 2227 2228 /* Verify that rtnetlink requests do not pass additional properties 2229 * potentially referring to different network namespaces. 2230 */ 2231 static int rtnl_ensure_unique_netns(struct nlattr *tb[], 2232 struct netlink_ext_ack *extack, 2233 bool netns_id_only) 2234 { 2235 2236 if (netns_id_only) { 2237 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD]) 2238 return 0; 2239 2240 NL_SET_ERR_MSG(extack, "specified netns attribute not supported"); 2241 return -EOPNOTSUPP; 2242 } 2243 2244 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])) 2245 goto invalid_attr; 2246 2247 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD])) 2248 goto invalid_attr; 2249 2250 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID])) 2251 goto invalid_attr; 2252 2253 return 0; 2254 2255 invalid_attr: 2256 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified"); 2257 return -EINVAL; 2258 } 2259 2260 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[], 2261 struct netlink_ext_ack *extack) 2262 { 2263 if (dev) { 2264 if (tb[IFLA_ADDRESS] && 2265 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 2266 return -EINVAL; 2267 2268 if (tb[IFLA_BROADCAST] && 2269 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 2270 return -EINVAL; 2271 } 2272 2273 if (tb[IFLA_AF_SPEC]) { 2274 struct nlattr *af; 2275 int rem, err; 2276 2277 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2278 const struct rtnl_af_ops *af_ops; 2279 2280 af_ops = rtnl_af_lookup(nla_type(af)); 2281 if (!af_ops) 2282 return -EAFNOSUPPORT; 2283 2284 if (!af_ops->set_link_af) 2285 return -EOPNOTSUPP; 2286 2287 if (af_ops->validate_link_af) { 2288 err = af_ops->validate_link_af(dev, af, extack); 2289 if (err < 0) 2290 return err; 2291 } 2292 } 2293 } 2294 2295 return 0; 2296 } 2297 2298 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 2299 int guid_type) 2300 { 2301 const struct net_device_ops *ops = dev->netdev_ops; 2302 2303 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 2304 } 2305 2306 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 2307 { 2308 if (dev->type != ARPHRD_INFINIBAND) 2309 return -EOPNOTSUPP; 2310 2311 return handle_infiniband_guid(dev, ivt, guid_type); 2312 } 2313 2314 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 2315 { 2316 const struct net_device_ops *ops = dev->netdev_ops; 2317 int err = -EINVAL; 2318 2319 if (tb[IFLA_VF_MAC]) { 2320 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 2321 2322 if (ivm->vf >= INT_MAX) 2323 return -EINVAL; 2324 err = -EOPNOTSUPP; 2325 if (ops->ndo_set_vf_mac) 2326 err = ops->ndo_set_vf_mac(dev, ivm->vf, 2327 ivm->mac); 2328 if (err < 0) 2329 return err; 2330 } 2331 2332 if (tb[IFLA_VF_VLAN]) { 2333 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 2334 2335 if (ivv->vf >= INT_MAX) 2336 return -EINVAL; 2337 err = -EOPNOTSUPP; 2338 if (ops->ndo_set_vf_vlan) 2339 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 2340 ivv->qos, 2341 htons(ETH_P_8021Q)); 2342 if (err < 0) 2343 return err; 2344 } 2345 2346 if (tb[IFLA_VF_VLAN_LIST]) { 2347 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 2348 struct nlattr *attr; 2349 int rem, len = 0; 2350 2351 err = -EOPNOTSUPP; 2352 if (!ops->ndo_set_vf_vlan) 2353 return err; 2354 2355 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 2356 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 2357 nla_len(attr) < NLA_HDRLEN) { 2358 return -EINVAL; 2359 } 2360 if (len >= MAX_VLAN_LIST_LEN) 2361 return -EOPNOTSUPP; 2362 ivvl[len] = nla_data(attr); 2363 2364 len++; 2365 } 2366 if (len == 0) 2367 return -EINVAL; 2368 2369 if (ivvl[0]->vf >= INT_MAX) 2370 return -EINVAL; 2371 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 2372 ivvl[0]->qos, ivvl[0]->vlan_proto); 2373 if (err < 0) 2374 return err; 2375 } 2376 2377 if (tb[IFLA_VF_TX_RATE]) { 2378 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 2379 struct ifla_vf_info ivf; 2380 2381 if (ivt->vf >= INT_MAX) 2382 return -EINVAL; 2383 err = -EOPNOTSUPP; 2384 if (ops->ndo_get_vf_config) 2385 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 2386 if (err < 0) 2387 return err; 2388 2389 err = -EOPNOTSUPP; 2390 if (ops->ndo_set_vf_rate) 2391 err = ops->ndo_set_vf_rate(dev, ivt->vf, 2392 ivf.min_tx_rate, 2393 ivt->rate); 2394 if (err < 0) 2395 return err; 2396 } 2397 2398 if (tb[IFLA_VF_RATE]) { 2399 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 2400 2401 if (ivt->vf >= INT_MAX) 2402 return -EINVAL; 2403 err = -EOPNOTSUPP; 2404 if (ops->ndo_set_vf_rate) 2405 err = ops->ndo_set_vf_rate(dev, ivt->vf, 2406 ivt->min_tx_rate, 2407 ivt->max_tx_rate); 2408 if (err < 0) 2409 return err; 2410 } 2411 2412 if (tb[IFLA_VF_SPOOFCHK]) { 2413 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 2414 2415 if (ivs->vf >= INT_MAX) 2416 return -EINVAL; 2417 err = -EOPNOTSUPP; 2418 if (ops->ndo_set_vf_spoofchk) 2419 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 2420 ivs->setting); 2421 if (err < 0) 2422 return err; 2423 } 2424 2425 if (tb[IFLA_VF_LINK_STATE]) { 2426 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 2427 2428 if (ivl->vf >= INT_MAX) 2429 return -EINVAL; 2430 err = -EOPNOTSUPP; 2431 if (ops->ndo_set_vf_link_state) 2432 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 2433 ivl->link_state); 2434 if (err < 0) 2435 return err; 2436 } 2437 2438 if (tb[IFLA_VF_RSS_QUERY_EN]) { 2439 struct ifla_vf_rss_query_en *ivrssq_en; 2440 2441 err = -EOPNOTSUPP; 2442 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 2443 if (ivrssq_en->vf >= INT_MAX) 2444 return -EINVAL; 2445 if (ops->ndo_set_vf_rss_query_en) 2446 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 2447 ivrssq_en->setting); 2448 if (err < 0) 2449 return err; 2450 } 2451 2452 if (tb[IFLA_VF_TRUST]) { 2453 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 2454 2455 if (ivt->vf >= INT_MAX) 2456 return -EINVAL; 2457 err = -EOPNOTSUPP; 2458 if (ops->ndo_set_vf_trust) 2459 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 2460 if (err < 0) 2461 return err; 2462 } 2463 2464 if (tb[IFLA_VF_IB_NODE_GUID]) { 2465 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 2466 2467 if (ivt->vf >= INT_MAX) 2468 return -EINVAL; 2469 if (!ops->ndo_set_vf_guid) 2470 return -EOPNOTSUPP; 2471 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 2472 } 2473 2474 if (tb[IFLA_VF_IB_PORT_GUID]) { 2475 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 2476 2477 if (ivt->vf >= INT_MAX) 2478 return -EINVAL; 2479 if (!ops->ndo_set_vf_guid) 2480 return -EOPNOTSUPP; 2481 2482 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 2483 } 2484 2485 return err; 2486 } 2487 2488 static int do_set_master(struct net_device *dev, int ifindex, 2489 struct netlink_ext_ack *extack) 2490 { 2491 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 2492 const struct net_device_ops *ops; 2493 int err; 2494 2495 if (upper_dev) { 2496 if (upper_dev->ifindex == ifindex) 2497 return 0; 2498 ops = upper_dev->netdev_ops; 2499 if (ops->ndo_del_slave) { 2500 err = ops->ndo_del_slave(upper_dev, dev); 2501 if (err) 2502 return err; 2503 } else { 2504 return -EOPNOTSUPP; 2505 } 2506 } 2507 2508 if (ifindex) { 2509 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 2510 if (!upper_dev) 2511 return -EINVAL; 2512 ops = upper_dev->netdev_ops; 2513 if (ops->ndo_add_slave) { 2514 err = ops->ndo_add_slave(upper_dev, dev, extack); 2515 if (err) 2516 return err; 2517 } else { 2518 return -EOPNOTSUPP; 2519 } 2520 } 2521 return 0; 2522 } 2523 2524 static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = { 2525 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 }, 2526 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 }, 2527 }; 2528 2529 static int do_set_proto_down(struct net_device *dev, 2530 struct nlattr *nl_proto_down, 2531 struct nlattr *nl_proto_down_reason, 2532 struct netlink_ext_ack *extack) 2533 { 2534 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1]; 2535 const struct net_device_ops *ops = dev->netdev_ops; 2536 unsigned long mask = 0; 2537 u32 value; 2538 bool proto_down; 2539 int err; 2540 2541 if (!ops->ndo_change_proto_down) { 2542 NL_SET_ERR_MSG(extack, "Protodown not supported by device"); 2543 return -EOPNOTSUPP; 2544 } 2545 2546 if (nl_proto_down_reason) { 2547 err = nla_parse_nested_deprecated(pdreason, 2548 IFLA_PROTO_DOWN_REASON_MAX, 2549 nl_proto_down_reason, 2550 ifla_proto_down_reason_policy, 2551 NULL); 2552 if (err < 0) 2553 return err; 2554 2555 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) { 2556 NL_SET_ERR_MSG(extack, "Invalid protodown reason value"); 2557 return -EINVAL; 2558 } 2559 2560 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]); 2561 2562 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK]) 2563 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]); 2564 2565 dev_change_proto_down_reason(dev, mask, value); 2566 } 2567 2568 if (nl_proto_down) { 2569 proto_down = nla_get_u8(nl_proto_down); 2570 2571 /* Don't turn off protodown if there are active reasons */ 2572 if (!proto_down && dev->proto_down_reason) { 2573 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons"); 2574 return -EBUSY; 2575 } 2576 err = dev_change_proto_down(dev, 2577 proto_down); 2578 if (err) 2579 return err; 2580 } 2581 2582 return 0; 2583 } 2584 2585 #define DO_SETLINK_MODIFIED 0x01 2586 /* notify flag means notify + modified. */ 2587 #define DO_SETLINK_NOTIFY 0x03 2588 static int do_setlink(const struct sk_buff *skb, 2589 struct net_device *dev, struct ifinfomsg *ifm, 2590 struct netlink_ext_ack *extack, 2591 struct nlattr **tb, char *ifname, int status) 2592 { 2593 const struct net_device_ops *ops = dev->netdev_ops; 2594 int err; 2595 2596 err = validate_linkmsg(dev, tb, extack); 2597 if (err < 0) 2598 return err; 2599 2600 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) { 2601 struct net *net; 2602 int new_ifindex; 2603 2604 net = rtnl_link_get_net_capable(skb, dev_net(dev), 2605 tb, CAP_NET_ADMIN); 2606 if (IS_ERR(net)) { 2607 err = PTR_ERR(net); 2608 goto errout; 2609 } 2610 2611 if (tb[IFLA_NEW_IFINDEX]) 2612 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]); 2613 else 2614 new_ifindex = 0; 2615 2616 err = __dev_change_net_namespace(dev, net, ifname, new_ifindex); 2617 put_net(net); 2618 if (err) 2619 goto errout; 2620 status |= DO_SETLINK_MODIFIED; 2621 } 2622 2623 if (tb[IFLA_MAP]) { 2624 struct rtnl_link_ifmap *u_map; 2625 struct ifmap k_map; 2626 2627 if (!ops->ndo_set_config) { 2628 err = -EOPNOTSUPP; 2629 goto errout; 2630 } 2631 2632 if (!netif_device_present(dev)) { 2633 err = -ENODEV; 2634 goto errout; 2635 } 2636 2637 u_map = nla_data(tb[IFLA_MAP]); 2638 k_map.mem_start = (unsigned long) u_map->mem_start; 2639 k_map.mem_end = (unsigned long) u_map->mem_end; 2640 k_map.base_addr = (unsigned short) u_map->base_addr; 2641 k_map.irq = (unsigned char) u_map->irq; 2642 k_map.dma = (unsigned char) u_map->dma; 2643 k_map.port = (unsigned char) u_map->port; 2644 2645 err = ops->ndo_set_config(dev, &k_map); 2646 if (err < 0) 2647 goto errout; 2648 2649 status |= DO_SETLINK_NOTIFY; 2650 } 2651 2652 if (tb[IFLA_ADDRESS]) { 2653 struct sockaddr *sa; 2654 int len; 2655 2656 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len, 2657 sizeof(*sa)); 2658 sa = kmalloc(len, GFP_KERNEL); 2659 if (!sa) { 2660 err = -ENOMEM; 2661 goto errout; 2662 } 2663 sa->sa_family = dev->type; 2664 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 2665 dev->addr_len); 2666 err = dev_set_mac_address_user(dev, sa, extack); 2667 kfree(sa); 2668 if (err) 2669 goto errout; 2670 status |= DO_SETLINK_MODIFIED; 2671 } 2672 2673 if (tb[IFLA_MTU]) { 2674 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack); 2675 if (err < 0) 2676 goto errout; 2677 status |= DO_SETLINK_MODIFIED; 2678 } 2679 2680 if (tb[IFLA_GROUP]) { 2681 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2682 status |= DO_SETLINK_NOTIFY; 2683 } 2684 2685 /* 2686 * Interface selected by interface index but interface 2687 * name provided implies that a name change has been 2688 * requested. 2689 */ 2690 if (ifm->ifi_index > 0 && ifname[0]) { 2691 err = dev_change_name(dev, ifname); 2692 if (err < 0) 2693 goto errout; 2694 status |= DO_SETLINK_MODIFIED; 2695 } 2696 2697 if (tb[IFLA_IFALIAS]) { 2698 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2699 nla_len(tb[IFLA_IFALIAS])); 2700 if (err < 0) 2701 goto errout; 2702 status |= DO_SETLINK_NOTIFY; 2703 } 2704 2705 if (tb[IFLA_BROADCAST]) { 2706 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2707 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2708 } 2709 2710 if (ifm->ifi_flags || ifm->ifi_change) { 2711 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), 2712 extack); 2713 if (err < 0) 2714 goto errout; 2715 } 2716 2717 if (tb[IFLA_MASTER]) { 2718 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 2719 if (err) 2720 goto errout; 2721 status |= DO_SETLINK_MODIFIED; 2722 } 2723 2724 if (tb[IFLA_CARRIER]) { 2725 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2726 if (err) 2727 goto errout; 2728 status |= DO_SETLINK_MODIFIED; 2729 } 2730 2731 if (tb[IFLA_TXQLEN]) { 2732 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]); 2733 2734 err = dev_change_tx_queue_len(dev, value); 2735 if (err) 2736 goto errout; 2737 status |= DO_SETLINK_MODIFIED; 2738 } 2739 2740 if (tb[IFLA_GSO_MAX_SIZE]) { 2741 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]); 2742 2743 if (max_size > GSO_MAX_SIZE) { 2744 err = -EINVAL; 2745 goto errout; 2746 } 2747 2748 if (dev->gso_max_size ^ max_size) { 2749 netif_set_gso_max_size(dev, max_size); 2750 status |= DO_SETLINK_MODIFIED; 2751 } 2752 } 2753 2754 if (tb[IFLA_GSO_MAX_SEGS]) { 2755 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); 2756 2757 if (max_segs > GSO_MAX_SEGS) { 2758 err = -EINVAL; 2759 goto errout; 2760 } 2761 2762 if (dev->gso_max_segs ^ max_segs) { 2763 dev->gso_max_segs = max_segs; 2764 status |= DO_SETLINK_MODIFIED; 2765 } 2766 } 2767 2768 if (tb[IFLA_OPERSTATE]) 2769 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2770 2771 if (tb[IFLA_LINKMODE]) { 2772 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2773 2774 write_lock_bh(&dev_base_lock); 2775 if (dev->link_mode ^ value) 2776 status |= DO_SETLINK_NOTIFY; 2777 dev->link_mode = value; 2778 write_unlock_bh(&dev_base_lock); 2779 } 2780 2781 if (tb[IFLA_VFINFO_LIST]) { 2782 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2783 struct nlattr *attr; 2784 int rem; 2785 2786 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2787 if (nla_type(attr) != IFLA_VF_INFO || 2788 nla_len(attr) < NLA_HDRLEN) { 2789 err = -EINVAL; 2790 goto errout; 2791 } 2792 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX, 2793 attr, 2794 ifla_vf_policy, 2795 NULL); 2796 if (err < 0) 2797 goto errout; 2798 err = do_setvfinfo(dev, vfinfo); 2799 if (err < 0) 2800 goto errout; 2801 status |= DO_SETLINK_NOTIFY; 2802 } 2803 } 2804 err = 0; 2805 2806 if (tb[IFLA_VF_PORTS]) { 2807 struct nlattr *port[IFLA_PORT_MAX+1]; 2808 struct nlattr *attr; 2809 int vf; 2810 int rem; 2811 2812 err = -EOPNOTSUPP; 2813 if (!ops->ndo_set_vf_port) 2814 goto errout; 2815 2816 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2817 if (nla_type(attr) != IFLA_VF_PORT || 2818 nla_len(attr) < NLA_HDRLEN) { 2819 err = -EINVAL; 2820 goto errout; 2821 } 2822 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, 2823 attr, 2824 ifla_port_policy, 2825 NULL); 2826 if (err < 0) 2827 goto errout; 2828 if (!port[IFLA_PORT_VF]) { 2829 err = -EOPNOTSUPP; 2830 goto errout; 2831 } 2832 vf = nla_get_u32(port[IFLA_PORT_VF]); 2833 err = ops->ndo_set_vf_port(dev, vf, port); 2834 if (err < 0) 2835 goto errout; 2836 status |= DO_SETLINK_NOTIFY; 2837 } 2838 } 2839 err = 0; 2840 2841 if (tb[IFLA_PORT_SELF]) { 2842 struct nlattr *port[IFLA_PORT_MAX+1]; 2843 2844 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, 2845 tb[IFLA_PORT_SELF], 2846 ifla_port_policy, NULL); 2847 if (err < 0) 2848 goto errout; 2849 2850 err = -EOPNOTSUPP; 2851 if (ops->ndo_set_vf_port) 2852 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2853 if (err < 0) 2854 goto errout; 2855 status |= DO_SETLINK_NOTIFY; 2856 } 2857 2858 if (tb[IFLA_AF_SPEC]) { 2859 struct nlattr *af; 2860 int rem; 2861 2862 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2863 const struct rtnl_af_ops *af_ops; 2864 2865 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af)))); 2866 2867 err = af_ops->set_link_af(dev, af, extack); 2868 if (err < 0) 2869 goto errout; 2870 2871 status |= DO_SETLINK_NOTIFY; 2872 } 2873 } 2874 err = 0; 2875 2876 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) { 2877 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN], 2878 tb[IFLA_PROTO_DOWN_REASON], extack); 2879 if (err) 2880 goto errout; 2881 status |= DO_SETLINK_NOTIFY; 2882 } 2883 2884 if (tb[IFLA_XDP]) { 2885 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2886 u32 xdp_flags = 0; 2887 2888 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX, 2889 tb[IFLA_XDP], 2890 ifla_xdp_policy, NULL); 2891 if (err < 0) 2892 goto errout; 2893 2894 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) { 2895 err = -EINVAL; 2896 goto errout; 2897 } 2898 2899 if (xdp[IFLA_XDP_FLAGS]) { 2900 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2901 if (xdp_flags & ~XDP_FLAGS_MASK) { 2902 err = -EINVAL; 2903 goto errout; 2904 } 2905 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) { 2906 err = -EINVAL; 2907 goto errout; 2908 } 2909 } 2910 2911 if (xdp[IFLA_XDP_FD]) { 2912 int expected_fd = -1; 2913 2914 if (xdp_flags & XDP_FLAGS_REPLACE) { 2915 if (!xdp[IFLA_XDP_EXPECTED_FD]) { 2916 err = -EINVAL; 2917 goto errout; 2918 } 2919 expected_fd = 2920 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]); 2921 } 2922 2923 err = dev_change_xdp_fd(dev, extack, 2924 nla_get_s32(xdp[IFLA_XDP_FD]), 2925 expected_fd, 2926 xdp_flags); 2927 if (err) 2928 goto errout; 2929 status |= DO_SETLINK_NOTIFY; 2930 } 2931 } 2932 2933 errout: 2934 if (status & DO_SETLINK_MODIFIED) { 2935 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY) 2936 netdev_state_change(dev); 2937 2938 if (err < 0) 2939 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", 2940 dev->name); 2941 } 2942 2943 return err; 2944 } 2945 2946 static struct net_device *rtnl_dev_get(struct net *net, 2947 struct nlattr *ifname_attr, 2948 struct nlattr *altifname_attr, 2949 char *ifname) 2950 { 2951 char buffer[ALTIFNAMSIZ]; 2952 2953 if (!ifname) { 2954 ifname = buffer; 2955 if (ifname_attr) 2956 nla_strscpy(ifname, ifname_attr, IFNAMSIZ); 2957 else if (altifname_attr) 2958 nla_strscpy(ifname, altifname_attr, ALTIFNAMSIZ); 2959 else 2960 return NULL; 2961 } 2962 2963 return __dev_get_by_name(net, ifname); 2964 } 2965 2966 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2967 struct netlink_ext_ack *extack) 2968 { 2969 struct net *net = sock_net(skb->sk); 2970 struct ifinfomsg *ifm; 2971 struct net_device *dev; 2972 int err; 2973 struct nlattr *tb[IFLA_MAX+1]; 2974 char ifname[IFNAMSIZ]; 2975 2976 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 2977 ifla_policy, extack); 2978 if (err < 0) 2979 goto errout; 2980 2981 err = rtnl_ensure_unique_netns(tb, extack, false); 2982 if (err < 0) 2983 goto errout; 2984 2985 if (tb[IFLA_IFNAME]) 2986 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2987 else 2988 ifname[0] = '\0'; 2989 2990 err = -EINVAL; 2991 ifm = nlmsg_data(nlh); 2992 if (ifm->ifi_index > 0) 2993 dev = __dev_get_by_index(net, ifm->ifi_index); 2994 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 2995 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); 2996 else 2997 goto errout; 2998 2999 if (dev == NULL) { 3000 err = -ENODEV; 3001 goto errout; 3002 } 3003 3004 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0); 3005 errout: 3006 return err; 3007 } 3008 3009 static int rtnl_group_dellink(const struct net *net, int group) 3010 { 3011 struct net_device *dev, *aux; 3012 LIST_HEAD(list_kill); 3013 bool found = false; 3014 3015 if (!group) 3016 return -EPERM; 3017 3018 for_each_netdev(net, dev) { 3019 if (dev->group == group) { 3020 const struct rtnl_link_ops *ops; 3021 3022 found = true; 3023 ops = dev->rtnl_link_ops; 3024 if (!ops || !ops->dellink) 3025 return -EOPNOTSUPP; 3026 } 3027 } 3028 3029 if (!found) 3030 return -ENODEV; 3031 3032 for_each_netdev_safe(net, dev, aux) { 3033 if (dev->group == group) { 3034 const struct rtnl_link_ops *ops; 3035 3036 ops = dev->rtnl_link_ops; 3037 ops->dellink(dev, &list_kill); 3038 } 3039 } 3040 unregister_netdevice_many(&list_kill); 3041 3042 return 0; 3043 } 3044 3045 int rtnl_delete_link(struct net_device *dev) 3046 { 3047 const struct rtnl_link_ops *ops; 3048 LIST_HEAD(list_kill); 3049 3050 ops = dev->rtnl_link_ops; 3051 if (!ops || !ops->dellink) 3052 return -EOPNOTSUPP; 3053 3054 ops->dellink(dev, &list_kill); 3055 unregister_netdevice_many(&list_kill); 3056 3057 return 0; 3058 } 3059 EXPORT_SYMBOL_GPL(rtnl_delete_link); 3060 3061 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 3062 struct netlink_ext_ack *extack) 3063 { 3064 struct net *net = sock_net(skb->sk); 3065 struct net *tgt_net = net; 3066 struct net_device *dev = NULL; 3067 struct ifinfomsg *ifm; 3068 struct nlattr *tb[IFLA_MAX+1]; 3069 int err; 3070 int netnsid = -1; 3071 3072 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3073 ifla_policy, extack); 3074 if (err < 0) 3075 return err; 3076 3077 err = rtnl_ensure_unique_netns(tb, extack, true); 3078 if (err < 0) 3079 return err; 3080 3081 if (tb[IFLA_TARGET_NETNSID]) { 3082 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); 3083 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); 3084 if (IS_ERR(tgt_net)) 3085 return PTR_ERR(tgt_net); 3086 } 3087 3088 err = -EINVAL; 3089 ifm = nlmsg_data(nlh); 3090 if (ifm->ifi_index > 0) 3091 dev = __dev_get_by_index(tgt_net, ifm->ifi_index); 3092 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3093 dev = rtnl_dev_get(net, tb[IFLA_IFNAME], 3094 tb[IFLA_ALT_IFNAME], NULL); 3095 else if (tb[IFLA_GROUP]) 3096 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP])); 3097 else 3098 goto out; 3099 3100 if (!dev) { 3101 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0) 3102 err = -ENODEV; 3103 3104 goto out; 3105 } 3106 3107 err = rtnl_delete_link(dev); 3108 3109 out: 3110 if (netnsid >= 0) 3111 put_net(tgt_net); 3112 3113 return err; 3114 } 3115 3116 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 3117 { 3118 unsigned int old_flags; 3119 int err; 3120 3121 old_flags = dev->flags; 3122 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 3123 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), 3124 NULL); 3125 if (err < 0) 3126 return err; 3127 } 3128 3129 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) { 3130 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags)); 3131 } else { 3132 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 3133 __dev_notify_flags(dev, old_flags, ~0U); 3134 } 3135 return 0; 3136 } 3137 EXPORT_SYMBOL(rtnl_configure_link); 3138 3139 struct net_device *rtnl_create_link(struct net *net, const char *ifname, 3140 unsigned char name_assign_type, 3141 const struct rtnl_link_ops *ops, 3142 struct nlattr *tb[], 3143 struct netlink_ext_ack *extack) 3144 { 3145 struct net_device *dev; 3146 unsigned int num_tx_queues = 1; 3147 unsigned int num_rx_queues = 1; 3148 3149 if (tb[IFLA_NUM_TX_QUEUES]) 3150 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 3151 else if (ops->get_num_tx_queues) 3152 num_tx_queues = ops->get_num_tx_queues(); 3153 3154 if (tb[IFLA_NUM_RX_QUEUES]) 3155 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 3156 else if (ops->get_num_rx_queues) 3157 num_rx_queues = ops->get_num_rx_queues(); 3158 3159 if (num_tx_queues < 1 || num_tx_queues > 4096) { 3160 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues"); 3161 return ERR_PTR(-EINVAL); 3162 } 3163 3164 if (num_rx_queues < 1 || num_rx_queues > 4096) { 3165 NL_SET_ERR_MSG(extack, "Invalid number of receive queues"); 3166 return ERR_PTR(-EINVAL); 3167 } 3168 3169 if (ops->alloc) { 3170 dev = ops->alloc(tb, ifname, name_assign_type, 3171 num_tx_queues, num_rx_queues); 3172 if (IS_ERR(dev)) 3173 return dev; 3174 } else { 3175 dev = alloc_netdev_mqs(ops->priv_size, ifname, 3176 name_assign_type, ops->setup, 3177 num_tx_queues, num_rx_queues); 3178 } 3179 3180 if (!dev) 3181 return ERR_PTR(-ENOMEM); 3182 3183 dev_net_set(dev, net); 3184 dev->rtnl_link_ops = ops; 3185 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 3186 3187 if (tb[IFLA_MTU]) { 3188 u32 mtu = nla_get_u32(tb[IFLA_MTU]); 3189 int err; 3190 3191 err = dev_validate_mtu(dev, mtu, extack); 3192 if (err) { 3193 free_netdev(dev); 3194 return ERR_PTR(err); 3195 } 3196 dev->mtu = mtu; 3197 } 3198 if (tb[IFLA_ADDRESS]) { 3199 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 3200 nla_len(tb[IFLA_ADDRESS])); 3201 dev->addr_assign_type = NET_ADDR_SET; 3202 } 3203 if (tb[IFLA_BROADCAST]) 3204 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 3205 nla_len(tb[IFLA_BROADCAST])); 3206 if (tb[IFLA_TXQLEN]) 3207 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 3208 if (tb[IFLA_OPERSTATE]) 3209 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 3210 if (tb[IFLA_LINKMODE]) 3211 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 3212 if (tb[IFLA_GROUP]) 3213 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 3214 if (tb[IFLA_GSO_MAX_SIZE]) 3215 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE])); 3216 if (tb[IFLA_GSO_MAX_SEGS]) 3217 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); 3218 3219 return dev; 3220 } 3221 EXPORT_SYMBOL(rtnl_create_link); 3222 3223 static int rtnl_group_changelink(const struct sk_buff *skb, 3224 struct net *net, int group, 3225 struct ifinfomsg *ifm, 3226 struct netlink_ext_ack *extack, 3227 struct nlattr **tb) 3228 { 3229 struct net_device *dev, *aux; 3230 int err; 3231 3232 for_each_netdev_safe(net, dev, aux) { 3233 if (dev->group == group) { 3234 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0); 3235 if (err < 0) 3236 return err; 3237 } 3238 } 3239 3240 return 0; 3241 } 3242 3243 static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3244 struct nlattr **attr, struct netlink_ext_ack *extack) 3245 { 3246 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1]; 3247 unsigned char name_assign_type = NET_NAME_USER; 3248 struct nlattr *linkinfo[IFLA_INFO_MAX + 1]; 3249 const struct rtnl_link_ops *m_ops = NULL; 3250 struct net_device *master_dev = NULL; 3251 struct net *net = sock_net(skb->sk); 3252 const struct rtnl_link_ops *ops; 3253 struct nlattr *tb[IFLA_MAX + 1]; 3254 struct net *dest_net, *link_net; 3255 struct nlattr **slave_data; 3256 char kind[MODULE_NAME_LEN]; 3257 struct net_device *dev; 3258 struct ifinfomsg *ifm; 3259 char ifname[IFNAMSIZ]; 3260 struct nlattr **data; 3261 int err; 3262 3263 #ifdef CONFIG_MODULES 3264 replay: 3265 #endif 3266 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3267 ifla_policy, extack); 3268 if (err < 0) 3269 return err; 3270 3271 err = rtnl_ensure_unique_netns(tb, extack, false); 3272 if (err < 0) 3273 return err; 3274 3275 if (tb[IFLA_IFNAME]) 3276 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 3277 else 3278 ifname[0] = '\0'; 3279 3280 ifm = nlmsg_data(nlh); 3281 if (ifm->ifi_index > 0) 3282 dev = __dev_get_by_index(net, ifm->ifi_index); 3283 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3284 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); 3285 else 3286 dev = NULL; 3287 3288 if (dev) { 3289 master_dev = netdev_master_upper_dev_get(dev); 3290 if (master_dev) 3291 m_ops = master_dev->rtnl_link_ops; 3292 } 3293 3294 err = validate_linkmsg(dev, tb, extack); 3295 if (err < 0) 3296 return err; 3297 3298 if (tb[IFLA_LINKINFO]) { 3299 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX, 3300 tb[IFLA_LINKINFO], 3301 ifla_info_policy, NULL); 3302 if (err < 0) 3303 return err; 3304 } else 3305 memset(linkinfo, 0, sizeof(linkinfo)); 3306 3307 if (linkinfo[IFLA_INFO_KIND]) { 3308 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 3309 ops = rtnl_link_ops_get(kind); 3310 } else { 3311 kind[0] = '\0'; 3312 ops = NULL; 3313 } 3314 3315 data = NULL; 3316 if (ops) { 3317 if (ops->maxtype > RTNL_MAX_TYPE) 3318 return -EINVAL; 3319 3320 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 3321 err = nla_parse_nested_deprecated(attr, ops->maxtype, 3322 linkinfo[IFLA_INFO_DATA], 3323 ops->policy, extack); 3324 if (err < 0) 3325 return err; 3326 data = attr; 3327 } 3328 if (ops->validate) { 3329 err = ops->validate(tb, data, extack); 3330 if (err < 0) 3331 return err; 3332 } 3333 } 3334 3335 slave_data = NULL; 3336 if (m_ops) { 3337 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE) 3338 return -EINVAL; 3339 3340 if (m_ops->slave_maxtype && 3341 linkinfo[IFLA_INFO_SLAVE_DATA]) { 3342 err = nla_parse_nested_deprecated(slave_attr, 3343 m_ops->slave_maxtype, 3344 linkinfo[IFLA_INFO_SLAVE_DATA], 3345 m_ops->slave_policy, 3346 extack); 3347 if (err < 0) 3348 return err; 3349 slave_data = slave_attr; 3350 } 3351 } 3352 3353 if (dev) { 3354 int status = 0; 3355 3356 if (nlh->nlmsg_flags & NLM_F_EXCL) 3357 return -EEXIST; 3358 if (nlh->nlmsg_flags & NLM_F_REPLACE) 3359 return -EOPNOTSUPP; 3360 3361 if (linkinfo[IFLA_INFO_DATA]) { 3362 if (!ops || ops != dev->rtnl_link_ops || 3363 !ops->changelink) 3364 return -EOPNOTSUPP; 3365 3366 err = ops->changelink(dev, tb, data, extack); 3367 if (err < 0) 3368 return err; 3369 status |= DO_SETLINK_NOTIFY; 3370 } 3371 3372 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 3373 if (!m_ops || !m_ops->slave_changelink) 3374 return -EOPNOTSUPP; 3375 3376 err = m_ops->slave_changelink(master_dev, dev, tb, 3377 slave_data, extack); 3378 if (err < 0) 3379 return err; 3380 status |= DO_SETLINK_NOTIFY; 3381 } 3382 3383 return do_setlink(skb, dev, ifm, extack, tb, ifname, status); 3384 } 3385 3386 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 3387 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 3388 return rtnl_group_changelink(skb, net, 3389 nla_get_u32(tb[IFLA_GROUP]), 3390 ifm, extack, tb); 3391 return -ENODEV; 3392 } 3393 3394 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 3395 return -EOPNOTSUPP; 3396 3397 if (!ops) { 3398 #ifdef CONFIG_MODULES 3399 if (kind[0]) { 3400 __rtnl_unlock(); 3401 request_module("rtnl-link-%s", kind); 3402 rtnl_lock(); 3403 ops = rtnl_link_ops_get(kind); 3404 if (ops) 3405 goto replay; 3406 } 3407 #endif 3408 NL_SET_ERR_MSG(extack, "Unknown device type"); 3409 return -EOPNOTSUPP; 3410 } 3411 3412 if (!ops->alloc && !ops->setup) 3413 return -EOPNOTSUPP; 3414 3415 if (!ifname[0]) { 3416 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 3417 name_assign_type = NET_NAME_ENUM; 3418 } 3419 3420 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN); 3421 if (IS_ERR(dest_net)) 3422 return PTR_ERR(dest_net); 3423 3424 if (tb[IFLA_LINK_NETNSID]) { 3425 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 3426 3427 link_net = get_net_ns_by_id(dest_net, id); 3428 if (!link_net) { 3429 NL_SET_ERR_MSG(extack, "Unknown network namespace id"); 3430 err = -EINVAL; 3431 goto out; 3432 } 3433 err = -EPERM; 3434 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 3435 goto out; 3436 } else { 3437 link_net = NULL; 3438 } 3439 3440 dev = rtnl_create_link(link_net ? : dest_net, ifname, 3441 name_assign_type, ops, tb, extack); 3442 if (IS_ERR(dev)) { 3443 err = PTR_ERR(dev); 3444 goto out; 3445 } 3446 3447 dev->ifindex = ifm->ifi_index; 3448 3449 if (ops->newlink) 3450 err = ops->newlink(link_net ? : net, dev, tb, data, extack); 3451 else 3452 err = register_netdevice(dev); 3453 if (err < 0) { 3454 free_netdev(dev); 3455 goto out; 3456 } 3457 3458 err = rtnl_configure_link(dev, ifm); 3459 if (err < 0) 3460 goto out_unregister; 3461 if (link_net) { 3462 err = dev_change_net_namespace(dev, dest_net, ifname); 3463 if (err < 0) 3464 goto out_unregister; 3465 } 3466 if (tb[IFLA_MASTER]) { 3467 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 3468 if (err) 3469 goto out_unregister; 3470 } 3471 out: 3472 if (link_net) 3473 put_net(link_net); 3474 put_net(dest_net); 3475 return err; 3476 out_unregister: 3477 if (ops->newlink) { 3478 LIST_HEAD(list_kill); 3479 3480 ops->dellink(dev, &list_kill); 3481 unregister_netdevice_many(&list_kill); 3482 } else { 3483 unregister_netdevice(dev); 3484 } 3485 goto out; 3486 } 3487 3488 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3489 struct netlink_ext_ack *extack) 3490 { 3491 struct nlattr **attr; 3492 int ret; 3493 3494 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL); 3495 if (!attr) 3496 return -ENOMEM; 3497 3498 ret = __rtnl_newlink(skb, nlh, attr, extack); 3499 kfree(attr); 3500 return ret; 3501 } 3502 3503 static int rtnl_valid_getlink_req(struct sk_buff *skb, 3504 const struct nlmsghdr *nlh, 3505 struct nlattr **tb, 3506 struct netlink_ext_ack *extack) 3507 { 3508 struct ifinfomsg *ifm; 3509 int i, err; 3510 3511 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 3512 NL_SET_ERR_MSG(extack, "Invalid header for get link"); 3513 return -EINVAL; 3514 } 3515 3516 if (!netlink_strict_get_check(skb)) 3517 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3518 ifla_policy, extack); 3519 3520 ifm = nlmsg_data(nlh); 3521 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 3522 ifm->ifi_change) { 3523 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request"); 3524 return -EINVAL; 3525 } 3526 3527 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX, 3528 ifla_policy, extack); 3529 if (err) 3530 return err; 3531 3532 for (i = 0; i <= IFLA_MAX; i++) { 3533 if (!tb[i]) 3534 continue; 3535 3536 switch (i) { 3537 case IFLA_IFNAME: 3538 case IFLA_ALT_IFNAME: 3539 case IFLA_EXT_MASK: 3540 case IFLA_TARGET_NETNSID: 3541 break; 3542 default: 3543 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request"); 3544 return -EINVAL; 3545 } 3546 } 3547 3548 return 0; 3549 } 3550 3551 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3552 struct netlink_ext_ack *extack) 3553 { 3554 struct net *net = sock_net(skb->sk); 3555 struct net *tgt_net = net; 3556 struct ifinfomsg *ifm; 3557 struct nlattr *tb[IFLA_MAX+1]; 3558 struct net_device *dev = NULL; 3559 struct sk_buff *nskb; 3560 int netnsid = -1; 3561 int err; 3562 u32 ext_filter_mask = 0; 3563 3564 err = rtnl_valid_getlink_req(skb, nlh, tb, extack); 3565 if (err < 0) 3566 return err; 3567 3568 err = rtnl_ensure_unique_netns(tb, extack, true); 3569 if (err < 0) 3570 return err; 3571 3572 if (tb[IFLA_TARGET_NETNSID]) { 3573 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); 3574 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); 3575 if (IS_ERR(tgt_net)) 3576 return PTR_ERR(tgt_net); 3577 } 3578 3579 if (tb[IFLA_EXT_MASK]) 3580 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 3581 3582 err = -EINVAL; 3583 ifm = nlmsg_data(nlh); 3584 if (ifm->ifi_index > 0) 3585 dev = __dev_get_by_index(tgt_net, ifm->ifi_index); 3586 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3587 dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME], 3588 tb[IFLA_ALT_IFNAME], NULL); 3589 else 3590 goto out; 3591 3592 err = -ENODEV; 3593 if (dev == NULL) 3594 goto out; 3595 3596 err = -ENOBUFS; 3597 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 3598 if (nskb == NULL) 3599 goto out; 3600 3601 err = rtnl_fill_ifinfo(nskb, dev, net, 3602 RTM_NEWLINK, NETLINK_CB(skb).portid, 3603 nlh->nlmsg_seq, 0, 0, ext_filter_mask, 3604 0, NULL, 0, netnsid, GFP_KERNEL); 3605 if (err < 0) { 3606 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 3607 WARN_ON(err == -EMSGSIZE); 3608 kfree_skb(nskb); 3609 } else 3610 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3611 out: 3612 if (netnsid >= 0) 3613 put_net(tgt_net); 3614 3615 return err; 3616 } 3617 3618 static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr, 3619 bool *changed, struct netlink_ext_ack *extack) 3620 { 3621 char *alt_ifname; 3622 int err; 3623 3624 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack); 3625 if (err) 3626 return err; 3627 3628 alt_ifname = nla_strdup(attr, GFP_KERNEL); 3629 if (!alt_ifname) 3630 return -ENOMEM; 3631 3632 if (cmd == RTM_NEWLINKPROP) { 3633 err = netdev_name_node_alt_create(dev, alt_ifname); 3634 if (!err) 3635 alt_ifname = NULL; 3636 } else if (cmd == RTM_DELLINKPROP) { 3637 err = netdev_name_node_alt_destroy(dev, alt_ifname); 3638 } else { 3639 WARN_ON_ONCE(1); 3640 err = -EINVAL; 3641 } 3642 3643 kfree(alt_ifname); 3644 if (!err) 3645 *changed = true; 3646 return err; 3647 } 3648 3649 static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh, 3650 struct netlink_ext_ack *extack) 3651 { 3652 struct net *net = sock_net(skb->sk); 3653 struct nlattr *tb[IFLA_MAX + 1]; 3654 struct net_device *dev; 3655 struct ifinfomsg *ifm; 3656 bool changed = false; 3657 struct nlattr *attr; 3658 int err, rem; 3659 3660 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 3661 if (err) 3662 return err; 3663 3664 err = rtnl_ensure_unique_netns(tb, extack, true); 3665 if (err) 3666 return err; 3667 3668 ifm = nlmsg_data(nlh); 3669 if (ifm->ifi_index > 0) 3670 dev = __dev_get_by_index(net, ifm->ifi_index); 3671 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3672 dev = rtnl_dev_get(net, tb[IFLA_IFNAME], 3673 tb[IFLA_ALT_IFNAME], NULL); 3674 else 3675 return -EINVAL; 3676 3677 if (!dev) 3678 return -ENODEV; 3679 3680 if (!tb[IFLA_PROP_LIST]) 3681 return 0; 3682 3683 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) { 3684 switch (nla_type(attr)) { 3685 case IFLA_ALT_IFNAME: 3686 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack); 3687 if (err) 3688 return err; 3689 break; 3690 } 3691 } 3692 3693 if (changed) 3694 netdev_state_change(dev); 3695 return 0; 3696 } 3697 3698 static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, 3699 struct netlink_ext_ack *extack) 3700 { 3701 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack); 3702 } 3703 3704 static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, 3705 struct netlink_ext_ack *extack) 3706 { 3707 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack); 3708 } 3709 3710 static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 3711 { 3712 struct net *net = sock_net(skb->sk); 3713 size_t min_ifinfo_dump_size = 0; 3714 struct nlattr *tb[IFLA_MAX+1]; 3715 u32 ext_filter_mask = 0; 3716 struct net_device *dev; 3717 int hdrlen; 3718 3719 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 3720 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 3721 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 3722 3723 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { 3724 if (tb[IFLA_EXT_MASK]) 3725 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 3726 } 3727 3728 if (!ext_filter_mask) 3729 return NLMSG_GOODSIZE; 3730 /* 3731 * traverse the list of net devices and compute the minimum 3732 * buffer size based upon the filter mask. 3733 */ 3734 rcu_read_lock(); 3735 for_each_netdev_rcu(net, dev) { 3736 min_ifinfo_dump_size = max(min_ifinfo_dump_size, 3737 if_nlmsg_size(dev, ext_filter_mask)); 3738 } 3739 rcu_read_unlock(); 3740 3741 return nlmsg_total_size(min_ifinfo_dump_size); 3742 } 3743 3744 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 3745 { 3746 int idx; 3747 int s_idx = cb->family; 3748 int type = cb->nlh->nlmsg_type - RTM_BASE; 3749 int ret = 0; 3750 3751 if (s_idx == 0) 3752 s_idx = 1; 3753 3754 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 3755 struct rtnl_link __rcu **tab; 3756 struct rtnl_link *link; 3757 rtnl_dumpit_func dumpit; 3758 3759 if (idx < s_idx || idx == PF_PACKET) 3760 continue; 3761 3762 if (type < 0 || type >= RTM_NR_MSGTYPES) 3763 continue; 3764 3765 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]); 3766 if (!tab) 3767 continue; 3768 3769 link = rcu_dereference_rtnl(tab[type]); 3770 if (!link) 3771 continue; 3772 3773 dumpit = link->dumpit; 3774 if (!dumpit) 3775 continue; 3776 3777 if (idx > s_idx) { 3778 memset(&cb->args[0], 0, sizeof(cb->args)); 3779 cb->prev_seq = 0; 3780 cb->seq = 0; 3781 } 3782 ret = dumpit(skb, cb); 3783 if (ret) 3784 break; 3785 } 3786 cb->family = idx; 3787 3788 return skb->len ? : ret; 3789 } 3790 3791 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 3792 unsigned int change, 3793 u32 event, gfp_t flags, int *new_nsid, 3794 int new_ifindex) 3795 { 3796 struct net *net = dev_net(dev); 3797 struct sk_buff *skb; 3798 int err = -ENOBUFS; 3799 size_t if_info_size; 3800 3801 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 3802 if (skb == NULL) 3803 goto errout; 3804 3805 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev), 3806 type, 0, 0, change, 0, 0, event, 3807 new_nsid, new_ifindex, -1, flags); 3808 if (err < 0) { 3809 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 3810 WARN_ON(err == -EMSGSIZE); 3811 kfree_skb(skb); 3812 goto errout; 3813 } 3814 return skb; 3815 errout: 3816 if (err < 0) 3817 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3818 return NULL; 3819 } 3820 3821 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 3822 { 3823 struct net *net = dev_net(dev); 3824 3825 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 3826 } 3827 3828 static void rtmsg_ifinfo_event(int type, struct net_device *dev, 3829 unsigned int change, u32 event, 3830 gfp_t flags, int *new_nsid, int new_ifindex) 3831 { 3832 struct sk_buff *skb; 3833 3834 if (dev->reg_state != NETREG_REGISTERED) 3835 return; 3836 3837 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid, 3838 new_ifindex); 3839 if (skb) 3840 rtmsg_ifinfo_send(skb, dev, flags); 3841 } 3842 3843 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 3844 gfp_t flags) 3845 { 3846 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 3847 NULL, 0); 3848 } 3849 3850 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, 3851 gfp_t flags, int *new_nsid, int new_ifindex) 3852 { 3853 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 3854 new_nsid, new_ifindex); 3855 } 3856 3857 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 3858 struct net_device *dev, 3859 u8 *addr, u16 vid, u32 pid, u32 seq, 3860 int type, unsigned int flags, 3861 int nlflags, u16 ndm_state) 3862 { 3863 struct nlmsghdr *nlh; 3864 struct ndmsg *ndm; 3865 3866 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 3867 if (!nlh) 3868 return -EMSGSIZE; 3869 3870 ndm = nlmsg_data(nlh); 3871 ndm->ndm_family = AF_BRIDGE; 3872 ndm->ndm_pad1 = 0; 3873 ndm->ndm_pad2 = 0; 3874 ndm->ndm_flags = flags; 3875 ndm->ndm_type = 0; 3876 ndm->ndm_ifindex = dev->ifindex; 3877 ndm->ndm_state = ndm_state; 3878 3879 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 3880 goto nla_put_failure; 3881 if (vid) 3882 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 3883 goto nla_put_failure; 3884 3885 nlmsg_end(skb, nlh); 3886 return 0; 3887 3888 nla_put_failure: 3889 nlmsg_cancel(skb, nlh); 3890 return -EMSGSIZE; 3891 } 3892 3893 static inline size_t rtnl_fdb_nlmsg_size(void) 3894 { 3895 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 3896 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 3897 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 3898 0; 3899 } 3900 3901 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 3902 u16 ndm_state) 3903 { 3904 struct net *net = dev_net(dev); 3905 struct sk_buff *skb; 3906 int err = -ENOBUFS; 3907 3908 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 3909 if (!skb) 3910 goto errout; 3911 3912 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 3913 0, 0, type, NTF_SELF, 0, ndm_state); 3914 if (err < 0) { 3915 kfree_skb(skb); 3916 goto errout; 3917 } 3918 3919 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 3920 return; 3921 errout: 3922 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 3923 } 3924 3925 /* 3926 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 3927 */ 3928 int ndo_dflt_fdb_add(struct ndmsg *ndm, 3929 struct nlattr *tb[], 3930 struct net_device *dev, 3931 const unsigned char *addr, u16 vid, 3932 u16 flags) 3933 { 3934 int err = -EINVAL; 3935 3936 /* If aging addresses are supported device will need to 3937 * implement its own handler for this. 3938 */ 3939 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 3940 netdev_info(dev, "default FDB implementation only supports local addresses\n"); 3941 return err; 3942 } 3943 3944 if (vid) { 3945 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n"); 3946 return err; 3947 } 3948 3949 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3950 err = dev_uc_add_excl(dev, addr); 3951 else if (is_multicast_ether_addr(addr)) 3952 err = dev_mc_add_excl(dev, addr); 3953 3954 /* Only return duplicate errors if NLM_F_EXCL is set */ 3955 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 3956 err = 0; 3957 3958 return err; 3959 } 3960 EXPORT_SYMBOL(ndo_dflt_fdb_add); 3961 3962 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid, 3963 struct netlink_ext_ack *extack) 3964 { 3965 u16 vid = 0; 3966 3967 if (vlan_attr) { 3968 if (nla_len(vlan_attr) != sizeof(u16)) { 3969 NL_SET_ERR_MSG(extack, "invalid vlan attribute size"); 3970 return -EINVAL; 3971 } 3972 3973 vid = nla_get_u16(vlan_attr); 3974 3975 if (!vid || vid >= VLAN_VID_MASK) { 3976 NL_SET_ERR_MSG(extack, "invalid vlan id"); 3977 return -EINVAL; 3978 } 3979 } 3980 *p_vid = vid; 3981 return 0; 3982 } 3983 3984 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, 3985 struct netlink_ext_ack *extack) 3986 { 3987 struct net *net = sock_net(skb->sk); 3988 struct ndmsg *ndm; 3989 struct nlattr *tb[NDA_MAX+1]; 3990 struct net_device *dev; 3991 u8 *addr; 3992 u16 vid; 3993 int err; 3994 3995 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, 3996 extack); 3997 if (err < 0) 3998 return err; 3999 4000 ndm = nlmsg_data(nlh); 4001 if (ndm->ndm_ifindex == 0) { 4002 NL_SET_ERR_MSG(extack, "invalid ifindex"); 4003 return -EINVAL; 4004 } 4005 4006 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 4007 if (dev == NULL) { 4008 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4009 return -ENODEV; 4010 } 4011 4012 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 4013 NL_SET_ERR_MSG(extack, "invalid address"); 4014 return -EINVAL; 4015 } 4016 4017 if (dev->type != ARPHRD_ETHER) { 4018 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices"); 4019 return -EINVAL; 4020 } 4021 4022 addr = nla_data(tb[NDA_LLADDR]); 4023 4024 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 4025 if (err) 4026 return err; 4027 4028 err = -EOPNOTSUPP; 4029 4030 /* Support fdb on master device the net/bridge default case */ 4031 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 4032 netif_is_bridge_port(dev)) { 4033 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4034 const struct net_device_ops *ops = br_dev->netdev_ops; 4035 4036 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 4037 nlh->nlmsg_flags, extack); 4038 if (err) 4039 goto out; 4040 else 4041 ndm->ndm_flags &= ~NTF_MASTER; 4042 } 4043 4044 /* Embedded bridge, macvlan, and any other device support */ 4045 if ((ndm->ndm_flags & NTF_SELF)) { 4046 if (dev->netdev_ops->ndo_fdb_add) 4047 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 4048 vid, 4049 nlh->nlmsg_flags, 4050 extack); 4051 else 4052 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 4053 nlh->nlmsg_flags); 4054 4055 if (!err) { 4056 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 4057 ndm->ndm_state); 4058 ndm->ndm_flags &= ~NTF_SELF; 4059 } 4060 } 4061 out: 4062 return err; 4063 } 4064 4065 /* 4066 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 4067 */ 4068 int ndo_dflt_fdb_del(struct ndmsg *ndm, 4069 struct nlattr *tb[], 4070 struct net_device *dev, 4071 const unsigned char *addr, u16 vid) 4072 { 4073 int err = -EINVAL; 4074 4075 /* If aging addresses are supported device will need to 4076 * implement its own handler for this. 4077 */ 4078 if (!(ndm->ndm_state & NUD_PERMANENT)) { 4079 netdev_info(dev, "default FDB implementation only supports local addresses\n"); 4080 return err; 4081 } 4082 4083 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 4084 err = dev_uc_del(dev, addr); 4085 else if (is_multicast_ether_addr(addr)) 4086 err = dev_mc_del(dev, addr); 4087 4088 return err; 4089 } 4090 EXPORT_SYMBOL(ndo_dflt_fdb_del); 4091 4092 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, 4093 struct netlink_ext_ack *extack) 4094 { 4095 struct net *net = sock_net(skb->sk); 4096 struct ndmsg *ndm; 4097 struct nlattr *tb[NDA_MAX+1]; 4098 struct net_device *dev; 4099 __u8 *addr; 4100 int err; 4101 u16 vid; 4102 4103 if (!netlink_capable(skb, CAP_NET_ADMIN)) 4104 return -EPERM; 4105 4106 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, 4107 extack); 4108 if (err < 0) 4109 return err; 4110 4111 ndm = nlmsg_data(nlh); 4112 if (ndm->ndm_ifindex == 0) { 4113 NL_SET_ERR_MSG(extack, "invalid ifindex"); 4114 return -EINVAL; 4115 } 4116 4117 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 4118 if (dev == NULL) { 4119 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4120 return -ENODEV; 4121 } 4122 4123 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 4124 NL_SET_ERR_MSG(extack, "invalid address"); 4125 return -EINVAL; 4126 } 4127 4128 if (dev->type != ARPHRD_ETHER) { 4129 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices"); 4130 return -EINVAL; 4131 } 4132 4133 addr = nla_data(tb[NDA_LLADDR]); 4134 4135 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 4136 if (err) 4137 return err; 4138 4139 err = -EOPNOTSUPP; 4140 4141 /* Support fdb on master device the net/bridge default case */ 4142 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 4143 netif_is_bridge_port(dev)) { 4144 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4145 const struct net_device_ops *ops = br_dev->netdev_ops; 4146 4147 if (ops->ndo_fdb_del) 4148 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 4149 4150 if (err) 4151 goto out; 4152 else 4153 ndm->ndm_flags &= ~NTF_MASTER; 4154 } 4155 4156 /* Embedded bridge, macvlan, and any other device support */ 4157 if (ndm->ndm_flags & NTF_SELF) { 4158 if (dev->netdev_ops->ndo_fdb_del) 4159 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 4160 vid); 4161 else 4162 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 4163 4164 if (!err) { 4165 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 4166 ndm->ndm_state); 4167 ndm->ndm_flags &= ~NTF_SELF; 4168 } 4169 } 4170 out: 4171 return err; 4172 } 4173 4174 static int nlmsg_populate_fdb(struct sk_buff *skb, 4175 struct netlink_callback *cb, 4176 struct net_device *dev, 4177 int *idx, 4178 struct netdev_hw_addr_list *list) 4179 { 4180 struct netdev_hw_addr *ha; 4181 int err; 4182 u32 portid, seq; 4183 4184 portid = NETLINK_CB(cb->skb).portid; 4185 seq = cb->nlh->nlmsg_seq; 4186 4187 list_for_each_entry(ha, &list->list, list) { 4188 if (*idx < cb->args[2]) 4189 goto skip; 4190 4191 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 4192 portid, seq, 4193 RTM_NEWNEIGH, NTF_SELF, 4194 NLM_F_MULTI, NUD_PERMANENT); 4195 if (err < 0) 4196 return err; 4197 skip: 4198 *idx += 1; 4199 } 4200 return 0; 4201 } 4202 4203 /** 4204 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 4205 * @skb: socket buffer to store message in 4206 * @cb: netlink callback 4207 * @dev: netdevice 4208 * @filter_dev: ignored 4209 * @idx: the number of FDB table entries dumped is added to *@idx 4210 * 4211 * Default netdevice operation to dump the existing unicast address list. 4212 * Returns number of addresses from list put in skb. 4213 */ 4214 int ndo_dflt_fdb_dump(struct sk_buff *skb, 4215 struct netlink_callback *cb, 4216 struct net_device *dev, 4217 struct net_device *filter_dev, 4218 int *idx) 4219 { 4220 int err; 4221 4222 if (dev->type != ARPHRD_ETHER) 4223 return -EINVAL; 4224 4225 netif_addr_lock_bh(dev); 4226 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 4227 if (err) 4228 goto out; 4229 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 4230 out: 4231 netif_addr_unlock_bh(dev); 4232 return err; 4233 } 4234 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 4235 4236 static int valid_fdb_dump_strict(const struct nlmsghdr *nlh, 4237 int *br_idx, int *brport_idx, 4238 struct netlink_ext_ack *extack) 4239 { 4240 struct nlattr *tb[NDA_MAX + 1]; 4241 struct ndmsg *ndm; 4242 int err, i; 4243 4244 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { 4245 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request"); 4246 return -EINVAL; 4247 } 4248 4249 ndm = nlmsg_data(nlh); 4250 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || 4251 ndm->ndm_flags || ndm->ndm_type) { 4252 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request"); 4253 return -EINVAL; 4254 } 4255 4256 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, 4257 NDA_MAX, NULL, extack); 4258 if (err < 0) 4259 return err; 4260 4261 *brport_idx = ndm->ndm_ifindex; 4262 for (i = 0; i <= NDA_MAX; ++i) { 4263 if (!tb[i]) 4264 continue; 4265 4266 switch (i) { 4267 case NDA_IFINDEX: 4268 if (nla_len(tb[i]) != sizeof(u32)) { 4269 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request"); 4270 return -EINVAL; 4271 } 4272 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]); 4273 break; 4274 case NDA_MASTER: 4275 if (nla_len(tb[i]) != sizeof(u32)) { 4276 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request"); 4277 return -EINVAL; 4278 } 4279 *br_idx = nla_get_u32(tb[NDA_MASTER]); 4280 break; 4281 default: 4282 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request"); 4283 return -EINVAL; 4284 } 4285 } 4286 4287 return 0; 4288 } 4289 4290 static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh, 4291 int *br_idx, int *brport_idx, 4292 struct netlink_ext_ack *extack) 4293 { 4294 struct nlattr *tb[IFLA_MAX+1]; 4295 int err; 4296 4297 /* A hack to preserve kernel<->userspace interface. 4298 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0. 4299 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails. 4300 * So, check for ndmsg with an optional u32 attribute (not used here). 4301 * Fortunately these sizes don't conflict with the size of ifinfomsg 4302 * with an optional attribute. 4303 */ 4304 if (nlmsg_len(nlh) != sizeof(struct ndmsg) && 4305 (nlmsg_len(nlh) != sizeof(struct ndmsg) + 4306 nla_attr_size(sizeof(u32)))) { 4307 struct ifinfomsg *ifm; 4308 4309 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), 4310 tb, IFLA_MAX, ifla_policy, 4311 extack); 4312 if (err < 0) { 4313 return -EINVAL; 4314 } else if (err == 0) { 4315 if (tb[IFLA_MASTER]) 4316 *br_idx = nla_get_u32(tb[IFLA_MASTER]); 4317 } 4318 4319 ifm = nlmsg_data(nlh); 4320 *brport_idx = ifm->ifi_index; 4321 } 4322 return 0; 4323 } 4324 4325 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 4326 { 4327 struct net_device *dev; 4328 struct net_device *br_dev = NULL; 4329 const struct net_device_ops *ops = NULL; 4330 const struct net_device_ops *cops = NULL; 4331 struct net *net = sock_net(skb->sk); 4332 struct hlist_head *head; 4333 int brport_idx = 0; 4334 int br_idx = 0; 4335 int h, s_h; 4336 int idx = 0, s_idx; 4337 int err = 0; 4338 int fidx = 0; 4339 4340 if (cb->strict_check) 4341 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx, 4342 cb->extack); 4343 else 4344 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx, 4345 cb->extack); 4346 if (err < 0) 4347 return err; 4348 4349 if (br_idx) { 4350 br_dev = __dev_get_by_index(net, br_idx); 4351 if (!br_dev) 4352 return -ENODEV; 4353 4354 ops = br_dev->netdev_ops; 4355 } 4356 4357 s_h = cb->args[0]; 4358 s_idx = cb->args[1]; 4359 4360 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4361 idx = 0; 4362 head = &net->dev_index_head[h]; 4363 hlist_for_each_entry(dev, head, index_hlist) { 4364 4365 if (brport_idx && (dev->ifindex != brport_idx)) 4366 continue; 4367 4368 if (!br_idx) { /* user did not specify a specific bridge */ 4369 if (netif_is_bridge_port(dev)) { 4370 br_dev = netdev_master_upper_dev_get(dev); 4371 cops = br_dev->netdev_ops; 4372 } 4373 } else { 4374 if (dev != br_dev && 4375 !netif_is_bridge_port(dev)) 4376 continue; 4377 4378 if (br_dev != netdev_master_upper_dev_get(dev) && 4379 !(dev->priv_flags & IFF_EBRIDGE)) 4380 continue; 4381 cops = ops; 4382 } 4383 4384 if (idx < s_idx) 4385 goto cont; 4386 4387 if (netif_is_bridge_port(dev)) { 4388 if (cops && cops->ndo_fdb_dump) { 4389 err = cops->ndo_fdb_dump(skb, cb, 4390 br_dev, dev, 4391 &fidx); 4392 if (err == -EMSGSIZE) 4393 goto out; 4394 } 4395 } 4396 4397 if (dev->netdev_ops->ndo_fdb_dump) 4398 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 4399 dev, NULL, 4400 &fidx); 4401 else 4402 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 4403 &fidx); 4404 if (err == -EMSGSIZE) 4405 goto out; 4406 4407 cops = NULL; 4408 4409 /* reset fdb offset to 0 for rest of the interfaces */ 4410 cb->args[2] = 0; 4411 fidx = 0; 4412 cont: 4413 idx++; 4414 } 4415 } 4416 4417 out: 4418 cb->args[0] = h; 4419 cb->args[1] = idx; 4420 cb->args[2] = fidx; 4421 4422 return skb->len; 4423 } 4424 4425 static int valid_fdb_get_strict(const struct nlmsghdr *nlh, 4426 struct nlattr **tb, u8 *ndm_flags, 4427 int *br_idx, int *brport_idx, u8 **addr, 4428 u16 *vid, struct netlink_ext_ack *extack) 4429 { 4430 struct ndmsg *ndm; 4431 int err, i; 4432 4433 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { 4434 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request"); 4435 return -EINVAL; 4436 } 4437 4438 ndm = nlmsg_data(nlh); 4439 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || 4440 ndm->ndm_type) { 4441 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request"); 4442 return -EINVAL; 4443 } 4444 4445 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) { 4446 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request"); 4447 return -EINVAL; 4448 } 4449 4450 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, 4451 NDA_MAX, nda_policy, extack); 4452 if (err < 0) 4453 return err; 4454 4455 *ndm_flags = ndm->ndm_flags; 4456 *brport_idx = ndm->ndm_ifindex; 4457 for (i = 0; i <= NDA_MAX; ++i) { 4458 if (!tb[i]) 4459 continue; 4460 4461 switch (i) { 4462 case NDA_MASTER: 4463 *br_idx = nla_get_u32(tb[i]); 4464 break; 4465 case NDA_LLADDR: 4466 if (nla_len(tb[i]) != ETH_ALEN) { 4467 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request"); 4468 return -EINVAL; 4469 } 4470 *addr = nla_data(tb[i]); 4471 break; 4472 case NDA_VLAN: 4473 err = fdb_vid_parse(tb[i], vid, extack); 4474 if (err) 4475 return err; 4476 break; 4477 case NDA_VNI: 4478 break; 4479 default: 4480 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request"); 4481 return -EINVAL; 4482 } 4483 } 4484 4485 return 0; 4486 } 4487 4488 static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh, 4489 struct netlink_ext_ack *extack) 4490 { 4491 struct net_device *dev = NULL, *br_dev = NULL; 4492 const struct net_device_ops *ops = NULL; 4493 struct net *net = sock_net(in_skb->sk); 4494 struct nlattr *tb[NDA_MAX + 1]; 4495 struct sk_buff *skb; 4496 int brport_idx = 0; 4497 u8 ndm_flags = 0; 4498 int br_idx = 0; 4499 u8 *addr = NULL; 4500 u16 vid = 0; 4501 int err; 4502 4503 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx, 4504 &brport_idx, &addr, &vid, extack); 4505 if (err < 0) 4506 return err; 4507 4508 if (!addr) { 4509 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request"); 4510 return -EINVAL; 4511 } 4512 4513 if (brport_idx) { 4514 dev = __dev_get_by_index(net, brport_idx); 4515 if (!dev) { 4516 NL_SET_ERR_MSG(extack, "Unknown device ifindex"); 4517 return -ENODEV; 4518 } 4519 } 4520 4521 if (br_idx) { 4522 if (dev) { 4523 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive"); 4524 return -EINVAL; 4525 } 4526 4527 br_dev = __dev_get_by_index(net, br_idx); 4528 if (!br_dev) { 4529 NL_SET_ERR_MSG(extack, "Invalid master ifindex"); 4530 return -EINVAL; 4531 } 4532 ops = br_dev->netdev_ops; 4533 } 4534 4535 if (dev) { 4536 if (!ndm_flags || (ndm_flags & NTF_MASTER)) { 4537 if (!netif_is_bridge_port(dev)) { 4538 NL_SET_ERR_MSG(extack, "Device is not a bridge port"); 4539 return -EINVAL; 4540 } 4541 br_dev = netdev_master_upper_dev_get(dev); 4542 if (!br_dev) { 4543 NL_SET_ERR_MSG(extack, "Master of device not found"); 4544 return -EINVAL; 4545 } 4546 ops = br_dev->netdev_ops; 4547 } else { 4548 if (!(ndm_flags & NTF_SELF)) { 4549 NL_SET_ERR_MSG(extack, "Missing NTF_SELF"); 4550 return -EINVAL; 4551 } 4552 ops = dev->netdev_ops; 4553 } 4554 } 4555 4556 if (!br_dev && !dev) { 4557 NL_SET_ERR_MSG(extack, "No device specified"); 4558 return -ENODEV; 4559 } 4560 4561 if (!ops || !ops->ndo_fdb_get) { 4562 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device"); 4563 return -EOPNOTSUPP; 4564 } 4565 4566 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 4567 if (!skb) 4568 return -ENOBUFS; 4569 4570 if (br_dev) 4571 dev = br_dev; 4572 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid, 4573 NETLINK_CB(in_skb).portid, 4574 nlh->nlmsg_seq, extack); 4575 if (err) 4576 goto out; 4577 4578 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); 4579 out: 4580 kfree_skb(skb); 4581 return err; 4582 } 4583 4584 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 4585 unsigned int attrnum, unsigned int flag) 4586 { 4587 if (mask & flag) 4588 return nla_put_u8(skb, attrnum, !!(flags & flag)); 4589 return 0; 4590 } 4591 4592 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 4593 struct net_device *dev, u16 mode, 4594 u32 flags, u32 mask, int nlflags, 4595 u32 filter_mask, 4596 int (*vlan_fill)(struct sk_buff *skb, 4597 struct net_device *dev, 4598 u32 filter_mask)) 4599 { 4600 struct nlmsghdr *nlh; 4601 struct ifinfomsg *ifm; 4602 struct nlattr *br_afspec; 4603 struct nlattr *protinfo; 4604 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 4605 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4606 int err = 0; 4607 4608 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 4609 if (nlh == NULL) 4610 return -EMSGSIZE; 4611 4612 ifm = nlmsg_data(nlh); 4613 ifm->ifi_family = AF_BRIDGE; 4614 ifm->__ifi_pad = 0; 4615 ifm->ifi_type = dev->type; 4616 ifm->ifi_index = dev->ifindex; 4617 ifm->ifi_flags = dev_get_flags(dev); 4618 ifm->ifi_change = 0; 4619 4620 4621 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 4622 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 4623 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 4624 (br_dev && 4625 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 4626 (dev->addr_len && 4627 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 4628 (dev->ifindex != dev_get_iflink(dev) && 4629 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 4630 goto nla_put_failure; 4631 4632 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 4633 if (!br_afspec) 4634 goto nla_put_failure; 4635 4636 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 4637 nla_nest_cancel(skb, br_afspec); 4638 goto nla_put_failure; 4639 } 4640 4641 if (mode != BRIDGE_MODE_UNDEF) { 4642 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 4643 nla_nest_cancel(skb, br_afspec); 4644 goto nla_put_failure; 4645 } 4646 } 4647 if (vlan_fill) { 4648 err = vlan_fill(skb, dev, filter_mask); 4649 if (err) { 4650 nla_nest_cancel(skb, br_afspec); 4651 goto nla_put_failure; 4652 } 4653 } 4654 nla_nest_end(skb, br_afspec); 4655 4656 protinfo = nla_nest_start(skb, IFLA_PROTINFO); 4657 if (!protinfo) 4658 goto nla_put_failure; 4659 4660 if (brport_nla_put_flag(skb, flags, mask, 4661 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 4662 brport_nla_put_flag(skb, flags, mask, 4663 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 4664 brport_nla_put_flag(skb, flags, mask, 4665 IFLA_BRPORT_FAST_LEAVE, 4666 BR_MULTICAST_FAST_LEAVE) || 4667 brport_nla_put_flag(skb, flags, mask, 4668 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 4669 brport_nla_put_flag(skb, flags, mask, 4670 IFLA_BRPORT_LEARNING, BR_LEARNING) || 4671 brport_nla_put_flag(skb, flags, mask, 4672 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 4673 brport_nla_put_flag(skb, flags, mask, 4674 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 4675 brport_nla_put_flag(skb, flags, mask, 4676 IFLA_BRPORT_PROXYARP, BR_PROXYARP) || 4677 brport_nla_put_flag(skb, flags, mask, 4678 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) || 4679 brport_nla_put_flag(skb, flags, mask, 4680 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) { 4681 nla_nest_cancel(skb, protinfo); 4682 goto nla_put_failure; 4683 } 4684 4685 nla_nest_end(skb, protinfo); 4686 4687 nlmsg_end(skb, nlh); 4688 return 0; 4689 nla_put_failure: 4690 nlmsg_cancel(skb, nlh); 4691 return err ? err : -EMSGSIZE; 4692 } 4693 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 4694 4695 static int valid_bridge_getlink_req(const struct nlmsghdr *nlh, 4696 bool strict_check, u32 *filter_mask, 4697 struct netlink_ext_ack *extack) 4698 { 4699 struct nlattr *tb[IFLA_MAX+1]; 4700 int err, i; 4701 4702 if (strict_check) { 4703 struct ifinfomsg *ifm; 4704 4705 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 4706 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump"); 4707 return -EINVAL; 4708 } 4709 4710 ifm = nlmsg_data(nlh); 4711 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 4712 ifm->ifi_change || ifm->ifi_index) { 4713 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request"); 4714 return -EINVAL; 4715 } 4716 4717 err = nlmsg_parse_deprecated_strict(nlh, 4718 sizeof(struct ifinfomsg), 4719 tb, IFLA_MAX, ifla_policy, 4720 extack); 4721 } else { 4722 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), 4723 tb, IFLA_MAX, ifla_policy, 4724 extack); 4725 } 4726 if (err < 0) 4727 return err; 4728 4729 /* new attributes should only be added with strict checking */ 4730 for (i = 0; i <= IFLA_MAX; ++i) { 4731 if (!tb[i]) 4732 continue; 4733 4734 switch (i) { 4735 case IFLA_EXT_MASK: 4736 *filter_mask = nla_get_u32(tb[i]); 4737 break; 4738 default: 4739 if (strict_check) { 4740 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request"); 4741 return -EINVAL; 4742 } 4743 } 4744 } 4745 4746 return 0; 4747 } 4748 4749 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 4750 { 4751 const struct nlmsghdr *nlh = cb->nlh; 4752 struct net *net = sock_net(skb->sk); 4753 struct net_device *dev; 4754 int idx = 0; 4755 u32 portid = NETLINK_CB(cb->skb).portid; 4756 u32 seq = nlh->nlmsg_seq; 4757 u32 filter_mask = 0; 4758 int err; 4759 4760 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask, 4761 cb->extack); 4762 if (err < 0 && cb->strict_check) 4763 return err; 4764 4765 rcu_read_lock(); 4766 for_each_netdev_rcu(net, dev) { 4767 const struct net_device_ops *ops = dev->netdev_ops; 4768 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4769 4770 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 4771 if (idx >= cb->args[0]) { 4772 err = br_dev->netdev_ops->ndo_bridge_getlink( 4773 skb, portid, seq, dev, 4774 filter_mask, NLM_F_MULTI); 4775 if (err < 0 && err != -EOPNOTSUPP) { 4776 if (likely(skb->len)) 4777 break; 4778 4779 goto out_err; 4780 } 4781 } 4782 idx++; 4783 } 4784 4785 if (ops->ndo_bridge_getlink) { 4786 if (idx >= cb->args[0]) { 4787 err = ops->ndo_bridge_getlink(skb, portid, 4788 seq, dev, 4789 filter_mask, 4790 NLM_F_MULTI); 4791 if (err < 0 && err != -EOPNOTSUPP) { 4792 if (likely(skb->len)) 4793 break; 4794 4795 goto out_err; 4796 } 4797 } 4798 idx++; 4799 } 4800 } 4801 err = skb->len; 4802 out_err: 4803 rcu_read_unlock(); 4804 cb->args[0] = idx; 4805 4806 return err; 4807 } 4808 4809 static inline size_t bridge_nlmsg_size(void) 4810 { 4811 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 4812 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 4813 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 4814 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 4815 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 4816 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 4817 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 4818 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 4819 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 4820 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 4821 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 4822 } 4823 4824 static int rtnl_bridge_notify(struct net_device *dev) 4825 { 4826 struct net *net = dev_net(dev); 4827 struct sk_buff *skb; 4828 int err = -EOPNOTSUPP; 4829 4830 if (!dev->netdev_ops->ndo_bridge_getlink) 4831 return 0; 4832 4833 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 4834 if (!skb) { 4835 err = -ENOMEM; 4836 goto errout; 4837 } 4838 4839 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 4840 if (err < 0) 4841 goto errout; 4842 4843 /* Notification info is only filled for bridge ports, not the bridge 4844 * device itself. Therefore, a zero notification length is valid and 4845 * should not result in an error. 4846 */ 4847 if (!skb->len) 4848 goto errout; 4849 4850 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 4851 return 0; 4852 errout: 4853 WARN_ON(err == -EMSGSIZE); 4854 kfree_skb(skb); 4855 if (err) 4856 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 4857 return err; 4858 } 4859 4860 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 4861 struct netlink_ext_ack *extack) 4862 { 4863 struct net *net = sock_net(skb->sk); 4864 struct ifinfomsg *ifm; 4865 struct net_device *dev; 4866 struct nlattr *br_spec, *attr = NULL; 4867 int rem, err = -EOPNOTSUPP; 4868 u16 flags = 0; 4869 bool have_flags = false; 4870 4871 if (nlmsg_len(nlh) < sizeof(*ifm)) 4872 return -EINVAL; 4873 4874 ifm = nlmsg_data(nlh); 4875 if (ifm->ifi_family != AF_BRIDGE) 4876 return -EPFNOSUPPORT; 4877 4878 dev = __dev_get_by_index(net, ifm->ifi_index); 4879 if (!dev) { 4880 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4881 return -ENODEV; 4882 } 4883 4884 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 4885 if (br_spec) { 4886 nla_for_each_nested(attr, br_spec, rem) { 4887 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 4888 if (nla_len(attr) < sizeof(flags)) 4889 return -EINVAL; 4890 4891 have_flags = true; 4892 flags = nla_get_u16(attr); 4893 break; 4894 } 4895 } 4896 } 4897 4898 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 4899 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4900 4901 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 4902 err = -EOPNOTSUPP; 4903 goto out; 4904 } 4905 4906 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags, 4907 extack); 4908 if (err) 4909 goto out; 4910 4911 flags &= ~BRIDGE_FLAGS_MASTER; 4912 } 4913 4914 if ((flags & BRIDGE_FLAGS_SELF)) { 4915 if (!dev->netdev_ops->ndo_bridge_setlink) 4916 err = -EOPNOTSUPP; 4917 else 4918 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 4919 flags, 4920 extack); 4921 if (!err) { 4922 flags &= ~BRIDGE_FLAGS_SELF; 4923 4924 /* Generate event to notify upper layer of bridge 4925 * change 4926 */ 4927 err = rtnl_bridge_notify(dev); 4928 } 4929 } 4930 4931 if (have_flags) 4932 memcpy(nla_data(attr), &flags, sizeof(flags)); 4933 out: 4934 return err; 4935 } 4936 4937 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 4938 struct netlink_ext_ack *extack) 4939 { 4940 struct net *net = sock_net(skb->sk); 4941 struct ifinfomsg *ifm; 4942 struct net_device *dev; 4943 struct nlattr *br_spec, *attr = NULL; 4944 int rem, err = -EOPNOTSUPP; 4945 u16 flags = 0; 4946 bool have_flags = false; 4947 4948 if (nlmsg_len(nlh) < sizeof(*ifm)) 4949 return -EINVAL; 4950 4951 ifm = nlmsg_data(nlh); 4952 if (ifm->ifi_family != AF_BRIDGE) 4953 return -EPFNOSUPPORT; 4954 4955 dev = __dev_get_by_index(net, ifm->ifi_index); 4956 if (!dev) { 4957 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4958 return -ENODEV; 4959 } 4960 4961 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 4962 if (br_spec) { 4963 nla_for_each_nested(attr, br_spec, rem) { 4964 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 4965 if (nla_len(attr) < sizeof(flags)) 4966 return -EINVAL; 4967 4968 have_flags = true; 4969 flags = nla_get_u16(attr); 4970 break; 4971 } 4972 } 4973 } 4974 4975 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 4976 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4977 4978 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 4979 err = -EOPNOTSUPP; 4980 goto out; 4981 } 4982 4983 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 4984 if (err) 4985 goto out; 4986 4987 flags &= ~BRIDGE_FLAGS_MASTER; 4988 } 4989 4990 if ((flags & BRIDGE_FLAGS_SELF)) { 4991 if (!dev->netdev_ops->ndo_bridge_dellink) 4992 err = -EOPNOTSUPP; 4993 else 4994 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 4995 flags); 4996 4997 if (!err) { 4998 flags &= ~BRIDGE_FLAGS_SELF; 4999 5000 /* Generate event to notify upper layer of bridge 5001 * change 5002 */ 5003 err = rtnl_bridge_notify(dev); 5004 } 5005 } 5006 5007 if (have_flags) 5008 memcpy(nla_data(attr), &flags, sizeof(flags)); 5009 out: 5010 return err; 5011 } 5012 5013 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 5014 { 5015 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 5016 (!idxattr || idxattr == attrid); 5017 } 5018 5019 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 5020 static int rtnl_get_offload_stats_attr_size(int attr_id) 5021 { 5022 switch (attr_id) { 5023 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 5024 return sizeof(struct rtnl_link_stats64); 5025 } 5026 5027 return 0; 5028 } 5029 5030 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 5031 int *prividx) 5032 { 5033 struct nlattr *attr = NULL; 5034 int attr_id, size; 5035 void *attr_data; 5036 int err; 5037 5038 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 5039 dev->netdev_ops->ndo_get_offload_stats)) 5040 return -ENODATA; 5041 5042 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 5043 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 5044 if (attr_id < *prividx) 5045 continue; 5046 5047 size = rtnl_get_offload_stats_attr_size(attr_id); 5048 if (!size) 5049 continue; 5050 5051 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 5052 continue; 5053 5054 attr = nla_reserve_64bit(skb, attr_id, size, 5055 IFLA_OFFLOAD_XSTATS_UNSPEC); 5056 if (!attr) 5057 goto nla_put_failure; 5058 5059 attr_data = nla_data(attr); 5060 memset(attr_data, 0, size); 5061 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 5062 attr_data); 5063 if (err) 5064 goto get_offload_stats_failure; 5065 } 5066 5067 if (!attr) 5068 return -ENODATA; 5069 5070 *prividx = 0; 5071 return 0; 5072 5073 nla_put_failure: 5074 err = -EMSGSIZE; 5075 get_offload_stats_failure: 5076 *prividx = attr_id; 5077 return err; 5078 } 5079 5080 static int rtnl_get_offload_stats_size(const struct net_device *dev) 5081 { 5082 int nla_size = 0; 5083 int attr_id; 5084 int size; 5085 5086 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 5087 dev->netdev_ops->ndo_get_offload_stats)) 5088 return 0; 5089 5090 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 5091 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 5092 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 5093 continue; 5094 size = rtnl_get_offload_stats_attr_size(attr_id); 5095 nla_size += nla_total_size_64bit(size); 5096 } 5097 5098 if (nla_size != 0) 5099 nla_size += nla_total_size(0); 5100 5101 return nla_size; 5102 } 5103 5104 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 5105 int type, u32 pid, u32 seq, u32 change, 5106 unsigned int flags, unsigned int filter_mask, 5107 int *idxattr, int *prividx) 5108 { 5109 struct if_stats_msg *ifsm; 5110 struct nlmsghdr *nlh; 5111 struct nlattr *attr; 5112 int s_prividx = *prividx; 5113 int err; 5114 5115 ASSERT_RTNL(); 5116 5117 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 5118 if (!nlh) 5119 return -EMSGSIZE; 5120 5121 ifsm = nlmsg_data(nlh); 5122 ifsm->family = PF_UNSPEC; 5123 ifsm->pad1 = 0; 5124 ifsm->pad2 = 0; 5125 ifsm->ifindex = dev->ifindex; 5126 ifsm->filter_mask = filter_mask; 5127 5128 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 5129 struct rtnl_link_stats64 *sp; 5130 5131 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 5132 sizeof(struct rtnl_link_stats64), 5133 IFLA_STATS_UNSPEC); 5134 if (!attr) 5135 goto nla_put_failure; 5136 5137 sp = nla_data(attr); 5138 dev_get_stats(dev, sp); 5139 } 5140 5141 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 5142 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 5143 5144 if (ops && ops->fill_linkxstats) { 5145 *idxattr = IFLA_STATS_LINK_XSTATS; 5146 attr = nla_nest_start_noflag(skb, 5147 IFLA_STATS_LINK_XSTATS); 5148 if (!attr) 5149 goto nla_put_failure; 5150 5151 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 5152 nla_nest_end(skb, attr); 5153 if (err) 5154 goto nla_put_failure; 5155 *idxattr = 0; 5156 } 5157 } 5158 5159 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 5160 *idxattr)) { 5161 const struct rtnl_link_ops *ops = NULL; 5162 const struct net_device *master; 5163 5164 master = netdev_master_upper_dev_get(dev); 5165 if (master) 5166 ops = master->rtnl_link_ops; 5167 if (ops && ops->fill_linkxstats) { 5168 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 5169 attr = nla_nest_start_noflag(skb, 5170 IFLA_STATS_LINK_XSTATS_SLAVE); 5171 if (!attr) 5172 goto nla_put_failure; 5173 5174 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 5175 nla_nest_end(skb, attr); 5176 if (err) 5177 goto nla_put_failure; 5178 *idxattr = 0; 5179 } 5180 } 5181 5182 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 5183 *idxattr)) { 5184 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 5185 attr = nla_nest_start_noflag(skb, 5186 IFLA_STATS_LINK_OFFLOAD_XSTATS); 5187 if (!attr) 5188 goto nla_put_failure; 5189 5190 err = rtnl_get_offload_stats(skb, dev, prividx); 5191 if (err == -ENODATA) 5192 nla_nest_cancel(skb, attr); 5193 else 5194 nla_nest_end(skb, attr); 5195 5196 if (err && err != -ENODATA) 5197 goto nla_put_failure; 5198 *idxattr = 0; 5199 } 5200 5201 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 5202 struct rtnl_af_ops *af_ops; 5203 5204 *idxattr = IFLA_STATS_AF_SPEC; 5205 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC); 5206 if (!attr) 5207 goto nla_put_failure; 5208 5209 rcu_read_lock(); 5210 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 5211 if (af_ops->fill_stats_af) { 5212 struct nlattr *af; 5213 int err; 5214 5215 af = nla_nest_start_noflag(skb, 5216 af_ops->family); 5217 if (!af) { 5218 rcu_read_unlock(); 5219 goto nla_put_failure; 5220 } 5221 err = af_ops->fill_stats_af(skb, dev); 5222 5223 if (err == -ENODATA) { 5224 nla_nest_cancel(skb, af); 5225 } else if (err < 0) { 5226 rcu_read_unlock(); 5227 goto nla_put_failure; 5228 } 5229 5230 nla_nest_end(skb, af); 5231 } 5232 } 5233 rcu_read_unlock(); 5234 5235 nla_nest_end(skb, attr); 5236 5237 *idxattr = 0; 5238 } 5239 5240 nlmsg_end(skb, nlh); 5241 5242 return 0; 5243 5244 nla_put_failure: 5245 /* not a multi message or no progress mean a real error */ 5246 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 5247 nlmsg_cancel(skb, nlh); 5248 else 5249 nlmsg_end(skb, nlh); 5250 5251 return -EMSGSIZE; 5252 } 5253 5254 static size_t if_nlmsg_stats_size(const struct net_device *dev, 5255 u32 filter_mask) 5256 { 5257 size_t size = 0; 5258 5259 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 5260 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 5261 5262 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 5263 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 5264 int attr = IFLA_STATS_LINK_XSTATS; 5265 5266 if (ops && ops->get_linkxstats_size) { 5267 size += nla_total_size(ops->get_linkxstats_size(dev, 5268 attr)); 5269 /* for IFLA_STATS_LINK_XSTATS */ 5270 size += nla_total_size(0); 5271 } 5272 } 5273 5274 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 5275 struct net_device *_dev = (struct net_device *)dev; 5276 const struct rtnl_link_ops *ops = NULL; 5277 const struct net_device *master; 5278 5279 /* netdev_master_upper_dev_get can't take const */ 5280 master = netdev_master_upper_dev_get(_dev); 5281 if (master) 5282 ops = master->rtnl_link_ops; 5283 if (ops && ops->get_linkxstats_size) { 5284 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 5285 5286 size += nla_total_size(ops->get_linkxstats_size(dev, 5287 attr)); 5288 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 5289 size += nla_total_size(0); 5290 } 5291 } 5292 5293 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 5294 size += rtnl_get_offload_stats_size(dev); 5295 5296 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 5297 struct rtnl_af_ops *af_ops; 5298 5299 /* for IFLA_STATS_AF_SPEC */ 5300 size += nla_total_size(0); 5301 5302 rcu_read_lock(); 5303 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 5304 if (af_ops->get_stats_af_size) { 5305 size += nla_total_size( 5306 af_ops->get_stats_af_size(dev)); 5307 5308 /* for AF_* */ 5309 size += nla_total_size(0); 5310 } 5311 } 5312 rcu_read_unlock(); 5313 } 5314 5315 return size; 5316 } 5317 5318 static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check, 5319 bool is_dump, struct netlink_ext_ack *extack) 5320 { 5321 struct if_stats_msg *ifsm; 5322 5323 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) { 5324 NL_SET_ERR_MSG(extack, "Invalid header for stats dump"); 5325 return -EINVAL; 5326 } 5327 5328 if (!strict_check) 5329 return 0; 5330 5331 ifsm = nlmsg_data(nlh); 5332 5333 /* only requests using strict checks can pass data to influence 5334 * the dump. The legacy exception is filter_mask. 5335 */ 5336 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) { 5337 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request"); 5338 return -EINVAL; 5339 } 5340 if (nlmsg_attrlen(nlh, sizeof(*ifsm))) { 5341 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header"); 5342 return -EINVAL; 5343 } 5344 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) { 5345 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask"); 5346 return -EINVAL; 5347 } 5348 5349 return 0; 5350 } 5351 5352 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, 5353 struct netlink_ext_ack *extack) 5354 { 5355 struct net *net = sock_net(skb->sk); 5356 struct net_device *dev = NULL; 5357 int idxattr = 0, prividx = 0; 5358 struct if_stats_msg *ifsm; 5359 struct sk_buff *nskb; 5360 u32 filter_mask; 5361 int err; 5362 5363 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb), 5364 false, extack); 5365 if (err) 5366 return err; 5367 5368 ifsm = nlmsg_data(nlh); 5369 if (ifsm->ifindex > 0) 5370 dev = __dev_get_by_index(net, ifsm->ifindex); 5371 else 5372 return -EINVAL; 5373 5374 if (!dev) 5375 return -ENODEV; 5376 5377 filter_mask = ifsm->filter_mask; 5378 if (!filter_mask) 5379 return -EINVAL; 5380 5381 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 5382 if (!nskb) 5383 return -ENOBUFS; 5384 5385 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 5386 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 5387 0, filter_mask, &idxattr, &prividx); 5388 if (err < 0) { 5389 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 5390 WARN_ON(err == -EMSGSIZE); 5391 kfree_skb(nskb); 5392 } else { 5393 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 5394 } 5395 5396 return err; 5397 } 5398 5399 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 5400 { 5401 struct netlink_ext_ack *extack = cb->extack; 5402 int h, s_h, err, s_idx, s_idxattr, s_prividx; 5403 struct net *net = sock_net(skb->sk); 5404 unsigned int flags = NLM_F_MULTI; 5405 struct if_stats_msg *ifsm; 5406 struct hlist_head *head; 5407 struct net_device *dev; 5408 u32 filter_mask = 0; 5409 int idx = 0; 5410 5411 s_h = cb->args[0]; 5412 s_idx = cb->args[1]; 5413 s_idxattr = cb->args[2]; 5414 s_prividx = cb->args[3]; 5415 5416 cb->seq = net->dev_base_seq; 5417 5418 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack); 5419 if (err) 5420 return err; 5421 5422 ifsm = nlmsg_data(cb->nlh); 5423 filter_mask = ifsm->filter_mask; 5424 if (!filter_mask) { 5425 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump"); 5426 return -EINVAL; 5427 } 5428 5429 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 5430 idx = 0; 5431 head = &net->dev_index_head[h]; 5432 hlist_for_each_entry(dev, head, index_hlist) { 5433 if (idx < s_idx) 5434 goto cont; 5435 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 5436 NETLINK_CB(cb->skb).portid, 5437 cb->nlh->nlmsg_seq, 0, 5438 flags, filter_mask, 5439 &s_idxattr, &s_prividx); 5440 /* If we ran out of room on the first message, 5441 * we're in trouble 5442 */ 5443 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 5444 5445 if (err < 0) 5446 goto out; 5447 s_prividx = 0; 5448 s_idxattr = 0; 5449 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 5450 cont: 5451 idx++; 5452 } 5453 } 5454 out: 5455 cb->args[3] = s_prividx; 5456 cb->args[2] = s_idxattr; 5457 cb->args[1] = idx; 5458 cb->args[0] = h; 5459 5460 return skb->len; 5461 } 5462 5463 /* Process one rtnetlink message. */ 5464 5465 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 5466 struct netlink_ext_ack *extack) 5467 { 5468 struct net *net = sock_net(skb->sk); 5469 struct rtnl_link *link; 5470 struct module *owner; 5471 int err = -EOPNOTSUPP; 5472 rtnl_doit_func doit; 5473 unsigned int flags; 5474 int kind; 5475 int family; 5476 int type; 5477 5478 type = nlh->nlmsg_type; 5479 if (type > RTM_MAX) 5480 return -EOPNOTSUPP; 5481 5482 type -= RTM_BASE; 5483 5484 /* All the messages must have at least 1 byte length */ 5485 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 5486 return 0; 5487 5488 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 5489 kind = type&3; 5490 5491 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 5492 return -EPERM; 5493 5494 rcu_read_lock(); 5495 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 5496 struct sock *rtnl; 5497 rtnl_dumpit_func dumpit; 5498 u32 min_dump_alloc = 0; 5499 5500 link = rtnl_get_link(family, type); 5501 if (!link || !link->dumpit) { 5502 family = PF_UNSPEC; 5503 link = rtnl_get_link(family, type); 5504 if (!link || !link->dumpit) 5505 goto err_unlock; 5506 } 5507 owner = link->owner; 5508 dumpit = link->dumpit; 5509 5510 if (type == RTM_GETLINK - RTM_BASE) 5511 min_dump_alloc = rtnl_calcit(skb, nlh); 5512 5513 err = 0; 5514 /* need to do this before rcu_read_unlock() */ 5515 if (!try_module_get(owner)) 5516 err = -EPROTONOSUPPORT; 5517 5518 rcu_read_unlock(); 5519 5520 rtnl = net->rtnl; 5521 if (err == 0) { 5522 struct netlink_dump_control c = { 5523 .dump = dumpit, 5524 .min_dump_alloc = min_dump_alloc, 5525 .module = owner, 5526 }; 5527 err = netlink_dump_start(rtnl, skb, nlh, &c); 5528 /* netlink_dump_start() will keep a reference on 5529 * module if dump is still in progress. 5530 */ 5531 module_put(owner); 5532 } 5533 return err; 5534 } 5535 5536 link = rtnl_get_link(family, type); 5537 if (!link || !link->doit) { 5538 family = PF_UNSPEC; 5539 link = rtnl_get_link(PF_UNSPEC, type); 5540 if (!link || !link->doit) 5541 goto out_unlock; 5542 } 5543 5544 owner = link->owner; 5545 if (!try_module_get(owner)) { 5546 err = -EPROTONOSUPPORT; 5547 goto out_unlock; 5548 } 5549 5550 flags = link->flags; 5551 if (flags & RTNL_FLAG_DOIT_UNLOCKED) { 5552 doit = link->doit; 5553 rcu_read_unlock(); 5554 if (doit) 5555 err = doit(skb, nlh, extack); 5556 module_put(owner); 5557 return err; 5558 } 5559 rcu_read_unlock(); 5560 5561 rtnl_lock(); 5562 link = rtnl_get_link(family, type); 5563 if (link && link->doit) 5564 err = link->doit(skb, nlh, extack); 5565 rtnl_unlock(); 5566 5567 module_put(owner); 5568 5569 return err; 5570 5571 out_unlock: 5572 rcu_read_unlock(); 5573 return err; 5574 5575 err_unlock: 5576 rcu_read_unlock(); 5577 return -EOPNOTSUPP; 5578 } 5579 5580 static void rtnetlink_rcv(struct sk_buff *skb) 5581 { 5582 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 5583 } 5584 5585 static int rtnetlink_bind(struct net *net, int group) 5586 { 5587 switch (group) { 5588 case RTNLGRP_IPV4_MROUTE_R: 5589 case RTNLGRP_IPV6_MROUTE_R: 5590 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 5591 return -EPERM; 5592 break; 5593 } 5594 return 0; 5595 } 5596 5597 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 5598 { 5599 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 5600 5601 switch (event) { 5602 case NETDEV_REBOOT: 5603 case NETDEV_CHANGEMTU: 5604 case NETDEV_CHANGEADDR: 5605 case NETDEV_CHANGENAME: 5606 case NETDEV_FEAT_CHANGE: 5607 case NETDEV_BONDING_FAILOVER: 5608 case NETDEV_POST_TYPE_CHANGE: 5609 case NETDEV_NOTIFY_PEERS: 5610 case NETDEV_CHANGEUPPER: 5611 case NETDEV_RESEND_IGMP: 5612 case NETDEV_CHANGEINFODATA: 5613 case NETDEV_CHANGELOWERSTATE: 5614 case NETDEV_CHANGE_TX_QUEUE_LEN: 5615 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), 5616 GFP_KERNEL, NULL, 0); 5617 break; 5618 default: 5619 break; 5620 } 5621 return NOTIFY_DONE; 5622 } 5623 5624 static struct notifier_block rtnetlink_dev_notifier = { 5625 .notifier_call = rtnetlink_event, 5626 }; 5627 5628 5629 static int __net_init rtnetlink_net_init(struct net *net) 5630 { 5631 struct sock *sk; 5632 struct netlink_kernel_cfg cfg = { 5633 .groups = RTNLGRP_MAX, 5634 .input = rtnetlink_rcv, 5635 .cb_mutex = &rtnl_mutex, 5636 .flags = NL_CFG_F_NONROOT_RECV, 5637 .bind = rtnetlink_bind, 5638 }; 5639 5640 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 5641 if (!sk) 5642 return -ENOMEM; 5643 net->rtnl = sk; 5644 return 0; 5645 } 5646 5647 static void __net_exit rtnetlink_net_exit(struct net *net) 5648 { 5649 netlink_kernel_release(net->rtnl); 5650 net->rtnl = NULL; 5651 } 5652 5653 static struct pernet_operations rtnetlink_net_ops = { 5654 .init = rtnetlink_net_init, 5655 .exit = rtnetlink_net_exit, 5656 }; 5657 5658 void __init rtnetlink_init(void) 5659 { 5660 if (register_pernet_subsys(&rtnetlink_net_ops)) 5661 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 5662 5663 register_netdevice_notifier(&rtnetlink_dev_notifier); 5664 5665 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 5666 rtnl_dump_ifinfo, 0); 5667 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0); 5668 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0); 5669 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0); 5670 5671 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0); 5672 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); 5673 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); 5674 5675 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0); 5676 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0); 5677 5678 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); 5679 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0); 5680 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0); 5681 5682 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0); 5683 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0); 5684 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0); 5685 5686 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 5687 0); 5688 } 5689