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