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