1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * INET An implementation of the TCP/IP protocol suite for the LINUX 4 * operating system. INET is implemented using the BSD Socket 5 * interface as the means of communication with the user level. 6 * 7 * Routing netlink socket interface: protocol independent part. 8 * 9 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 10 * 11 * Fixes: 12 * Vitaly E. Lavrov RTA_OK arithmetic was wrong. 13 */ 14 15 #include <linux/bitops.h> 16 #include <linux/errno.h> 17 #include <linux/module.h> 18 #include <linux/types.h> 19 #include <linux/socket.h> 20 #include <linux/kernel.h> 21 #include <linux/timer.h> 22 #include <linux/string.h> 23 #include <linux/sockios.h> 24 #include <linux/net.h> 25 #include <linux/fcntl.h> 26 #include <linux/mm.h> 27 #include <linux/slab.h> 28 #include <linux/interrupt.h> 29 #include <linux/capability.h> 30 #include <linux/skbuff.h> 31 #include <linux/init.h> 32 #include <linux/security.h> 33 #include <linux/mutex.h> 34 #include <linux/if_addr.h> 35 #include <linux/if_bridge.h> 36 #include <linux/if_vlan.h> 37 #include <linux/pci.h> 38 #include <linux/etherdevice.h> 39 #include <linux/bpf.h> 40 41 #include <linux/uaccess.h> 42 43 #include <linux/inet.h> 44 #include <linux/netdevice.h> 45 #include <net/ip.h> 46 #include <net/protocol.h> 47 #include <net/arp.h> 48 #include <net/route.h> 49 #include <net/udp.h> 50 #include <net/tcp.h> 51 #include <net/sock.h> 52 #include <net/pkt_sched.h> 53 #include <net/fib_rules.h> 54 #include <net/rtnetlink.h> 55 #include <net/net_namespace.h> 56 57 #define RTNL_MAX_TYPE 50 58 #define RTNL_SLAVE_MAX_TYPE 40 59 60 struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 struct module *owner; 64 unsigned int flags; 65 struct rcu_head rcu; 66 }; 67 68 static DEFINE_MUTEX(rtnl_mutex); 69 70 void rtnl_lock(void) 71 { 72 mutex_lock(&rtnl_mutex); 73 } 74 EXPORT_SYMBOL(rtnl_lock); 75 76 int rtnl_lock_killable(void) 77 { 78 return mutex_lock_killable(&rtnl_mutex); 79 } 80 EXPORT_SYMBOL(rtnl_lock_killable); 81 82 static struct sk_buff *defer_kfree_skb_list; 83 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) 84 { 85 if (head && tail) { 86 tail->next = defer_kfree_skb_list; 87 defer_kfree_skb_list = head; 88 } 89 } 90 EXPORT_SYMBOL(rtnl_kfree_skbs); 91 92 void __rtnl_unlock(void) 93 { 94 struct sk_buff *head = defer_kfree_skb_list; 95 96 defer_kfree_skb_list = NULL; 97 98 mutex_unlock(&rtnl_mutex); 99 100 while (head) { 101 struct sk_buff *next = head->next; 102 103 kfree_skb(head); 104 cond_resched(); 105 head = next; 106 } 107 } 108 109 void rtnl_unlock(void) 110 { 111 /* This fellow will unlock it for us. */ 112 netdev_run_todo(); 113 } 114 EXPORT_SYMBOL(rtnl_unlock); 115 116 int rtnl_trylock(void) 117 { 118 return mutex_trylock(&rtnl_mutex); 119 } 120 EXPORT_SYMBOL(rtnl_trylock); 121 122 int rtnl_is_locked(void) 123 { 124 return mutex_is_locked(&rtnl_mutex); 125 } 126 EXPORT_SYMBOL(rtnl_is_locked); 127 128 bool refcount_dec_and_rtnl_lock(refcount_t *r) 129 { 130 return refcount_dec_and_mutex_lock(r, &rtnl_mutex); 131 } 132 EXPORT_SYMBOL(refcount_dec_and_rtnl_lock); 133 134 #ifdef CONFIG_PROVE_LOCKING 135 bool lockdep_rtnl_is_held(void) 136 { 137 return lockdep_is_held(&rtnl_mutex); 138 } 139 EXPORT_SYMBOL(lockdep_rtnl_is_held); 140 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 141 142 static struct rtnl_link __rcu *__rcu *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 143 144 static inline int rtm_msgindex(int msgtype) 145 { 146 int msgindex = msgtype - RTM_BASE; 147 148 /* 149 * msgindex < 0 implies someone tried to register a netlink 150 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 151 * the message type has not been added to linux/rtnetlink.h 152 */ 153 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 154 155 return msgindex; 156 } 157 158 static struct rtnl_link *rtnl_get_link(int protocol, int msgtype) 159 { 160 struct rtnl_link __rcu **tab; 161 162 if (protocol >= ARRAY_SIZE(rtnl_msg_handlers)) 163 protocol = PF_UNSPEC; 164 165 tab = rcu_dereference_rtnl(rtnl_msg_handlers[protocol]); 166 if (!tab) 167 tab = rcu_dereference_rtnl(rtnl_msg_handlers[PF_UNSPEC]); 168 169 return rcu_dereference_rtnl(tab[msgtype]); 170 } 171 172 static int rtnl_register_internal(struct module *owner, 173 int protocol, int msgtype, 174 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 175 unsigned int flags) 176 { 177 struct rtnl_link *link, *old; 178 struct rtnl_link __rcu **tab; 179 int msgindex; 180 int ret = -ENOBUFS; 181 182 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 183 msgindex = rtm_msgindex(msgtype); 184 185 rtnl_lock(); 186 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 187 if (tab == NULL) { 188 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(void *), GFP_KERNEL); 189 if (!tab) 190 goto unlock; 191 192 /* ensures we see the 0 stores */ 193 rcu_assign_pointer(rtnl_msg_handlers[protocol], tab); 194 } 195 196 old = rtnl_dereference(tab[msgindex]); 197 if (old) { 198 link = kmemdup(old, sizeof(*old), GFP_KERNEL); 199 if (!link) 200 goto unlock; 201 } else { 202 link = kzalloc(sizeof(*link), GFP_KERNEL); 203 if (!link) 204 goto unlock; 205 } 206 207 WARN_ON(link->owner && link->owner != owner); 208 link->owner = owner; 209 210 WARN_ON(doit && link->doit && link->doit != doit); 211 if (doit) 212 link->doit = doit; 213 WARN_ON(dumpit && link->dumpit && link->dumpit != dumpit); 214 if (dumpit) 215 link->dumpit = dumpit; 216 217 link->flags |= flags; 218 219 /* publish protocol:msgtype */ 220 rcu_assign_pointer(tab[msgindex], link); 221 ret = 0; 222 if (old) 223 kfree_rcu(old, rcu); 224 unlock: 225 rtnl_unlock(); 226 return ret; 227 } 228 229 /** 230 * rtnl_register_module - Register a rtnetlink message type 231 * 232 * @owner: module registering the hook (THIS_MODULE) 233 * @protocol: Protocol family or PF_UNSPEC 234 * @msgtype: rtnetlink message type 235 * @doit: Function pointer called for each request message 236 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 237 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions 238 * 239 * Like rtnl_register, but for use by removable modules. 240 */ 241 int rtnl_register_module(struct module *owner, 242 int protocol, int msgtype, 243 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 244 unsigned int flags) 245 { 246 return rtnl_register_internal(owner, protocol, msgtype, 247 doit, dumpit, flags); 248 } 249 EXPORT_SYMBOL_GPL(rtnl_register_module); 250 251 /** 252 * rtnl_register - Register a rtnetlink message type 253 * @protocol: Protocol family or PF_UNSPEC 254 * @msgtype: rtnetlink message type 255 * @doit: Function pointer called for each request message 256 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 257 * @flags: rtnl_link_flags to modify behaviour of doit/dumpit functions 258 * 259 * Registers the specified function pointers (at least one of them has 260 * to be non-NULL) to be called whenever a request message for the 261 * specified protocol family and message type is received. 262 * 263 * The special protocol family PF_UNSPEC may be used to define fallback 264 * function pointers for the case when no entry for the specific protocol 265 * family exists. 266 */ 267 void rtnl_register(int protocol, int msgtype, 268 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 269 unsigned int flags) 270 { 271 int err; 272 273 err = rtnl_register_internal(NULL, protocol, msgtype, doit, dumpit, 274 flags); 275 if (err) 276 pr_err("Unable to register rtnetlink message handler, " 277 "protocol = %d, message type = %d\n", protocol, msgtype); 278 } 279 280 /** 281 * rtnl_unregister - Unregister a rtnetlink message type 282 * @protocol: Protocol family or PF_UNSPEC 283 * @msgtype: rtnetlink message type 284 * 285 * Returns 0 on success or a negative error code. 286 */ 287 int rtnl_unregister(int protocol, int msgtype) 288 { 289 struct rtnl_link __rcu **tab; 290 struct rtnl_link *link; 291 int msgindex; 292 293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 294 msgindex = rtm_msgindex(msgtype); 295 296 rtnl_lock(); 297 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 298 if (!tab) { 299 rtnl_unlock(); 300 return -ENOENT; 301 } 302 303 link = rtnl_dereference(tab[msgindex]); 304 rcu_assign_pointer(tab[msgindex], NULL); 305 rtnl_unlock(); 306 307 kfree_rcu(link, rcu); 308 309 return 0; 310 } 311 EXPORT_SYMBOL_GPL(rtnl_unregister); 312 313 /** 314 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 315 * @protocol : Protocol family or PF_UNSPEC 316 * 317 * Identical to calling rtnl_unregster() for all registered message types 318 * of a certain protocol family. 319 */ 320 void rtnl_unregister_all(int protocol) 321 { 322 struct rtnl_link __rcu **tab; 323 struct rtnl_link *link; 324 int msgindex; 325 326 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 327 328 rtnl_lock(); 329 tab = rtnl_dereference(rtnl_msg_handlers[protocol]); 330 if (!tab) { 331 rtnl_unlock(); 332 return; 333 } 334 RCU_INIT_POINTER(rtnl_msg_handlers[protocol], NULL); 335 for (msgindex = 0; msgindex < RTM_NR_MSGTYPES; msgindex++) { 336 link = rtnl_dereference(tab[msgindex]); 337 if (!link) 338 continue; 339 340 rcu_assign_pointer(tab[msgindex], NULL); 341 kfree_rcu(link, rcu); 342 } 343 rtnl_unlock(); 344 345 synchronize_net(); 346 347 kfree(tab); 348 } 349 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 350 351 static LIST_HEAD(link_ops); 352 353 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 354 { 355 const struct rtnl_link_ops *ops; 356 357 list_for_each_entry(ops, &link_ops, list) { 358 if (!strcmp(ops->kind, kind)) 359 return ops; 360 } 361 return NULL; 362 } 363 364 /** 365 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 366 * @ops: struct rtnl_link_ops * to register 367 * 368 * The caller must hold the rtnl_mutex. This function should be used 369 * by drivers that create devices during module initialization. It 370 * must be called before registering the devices. 371 * 372 * Returns 0 on success or a negative error code. 373 */ 374 int __rtnl_link_register(struct rtnl_link_ops *ops) 375 { 376 if (rtnl_link_ops_get(ops->kind)) 377 return -EEXIST; 378 379 /* The check for alloc/setup is here because if ops 380 * does not have that filled up, it is not possible 381 * to use the ops for creating device. So do not 382 * fill up dellink as well. That disables rtnl_dellink. 383 */ 384 if ((ops->alloc || ops->setup) && !ops->dellink) 385 ops->dellink = unregister_netdevice_queue; 386 387 list_add_tail(&ops->list, &link_ops); 388 return 0; 389 } 390 EXPORT_SYMBOL_GPL(__rtnl_link_register); 391 392 /** 393 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 394 * @ops: struct rtnl_link_ops * to register 395 * 396 * Returns 0 on success or a negative error code. 397 */ 398 int rtnl_link_register(struct rtnl_link_ops *ops) 399 { 400 int err; 401 402 /* Sanity-check max sizes to avoid stack buffer overflow. */ 403 if (WARN_ON(ops->maxtype > RTNL_MAX_TYPE || 404 ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE)) 405 return -EINVAL; 406 407 rtnl_lock(); 408 err = __rtnl_link_register(ops); 409 rtnl_unlock(); 410 return err; 411 } 412 EXPORT_SYMBOL_GPL(rtnl_link_register); 413 414 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 415 { 416 struct net_device *dev; 417 LIST_HEAD(list_kill); 418 419 for_each_netdev(net, dev) { 420 if (dev->rtnl_link_ops == ops) 421 ops->dellink(dev, &list_kill); 422 } 423 unregister_netdevice_many(&list_kill); 424 } 425 426 /** 427 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 428 * @ops: struct rtnl_link_ops * to unregister 429 * 430 * The caller must hold the rtnl_mutex and guarantee net_namespace_list 431 * integrity (hold pernet_ops_rwsem for writing to close the race 432 * with setup_net() and cleanup_net()). 433 */ 434 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 435 { 436 struct net *net; 437 438 for_each_net(net) { 439 __rtnl_kill_links(net, ops); 440 } 441 list_del(&ops->list); 442 } 443 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 444 445 /* Return with the rtnl_lock held when there are no network 446 * devices unregistering in any network namespace. 447 */ 448 static void rtnl_lock_unregistering_all(void) 449 { 450 struct net *net; 451 bool unregistering; 452 DEFINE_WAIT_FUNC(wait, woken_wake_function); 453 454 add_wait_queue(&netdev_unregistering_wq, &wait); 455 for (;;) { 456 unregistering = false; 457 rtnl_lock(); 458 /* We held write locked pernet_ops_rwsem, and parallel 459 * setup_net() and cleanup_net() are not possible. 460 */ 461 for_each_net(net) { 462 if (net->dev_unreg_count > 0) { 463 unregistering = true; 464 break; 465 } 466 } 467 if (!unregistering) 468 break; 469 __rtnl_unlock(); 470 471 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 472 } 473 remove_wait_queue(&netdev_unregistering_wq, &wait); 474 } 475 476 /** 477 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 478 * @ops: struct rtnl_link_ops * to unregister 479 */ 480 void rtnl_link_unregister(struct rtnl_link_ops *ops) 481 { 482 /* Close the race with setup_net() and cleanup_net() */ 483 down_write(&pernet_ops_rwsem); 484 rtnl_lock_unregistering_all(); 485 __rtnl_link_unregister(ops); 486 rtnl_unlock(); 487 up_write(&pernet_ops_rwsem); 488 } 489 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 490 491 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 492 { 493 struct net_device *master_dev; 494 const struct rtnl_link_ops *ops; 495 size_t size = 0; 496 497 rcu_read_lock(); 498 499 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 500 if (!master_dev) 501 goto out; 502 503 ops = master_dev->rtnl_link_ops; 504 if (!ops || !ops->get_slave_size) 505 goto out; 506 /* IFLA_INFO_SLAVE_DATA + nested data */ 507 size = nla_total_size(sizeof(struct nlattr)) + 508 ops->get_slave_size(master_dev, dev); 509 510 out: 511 rcu_read_unlock(); 512 return size; 513 } 514 515 static size_t rtnl_link_get_size(const struct net_device *dev) 516 { 517 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 518 size_t size; 519 520 if (!ops) 521 return 0; 522 523 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 524 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 525 526 if (ops->get_size) 527 /* IFLA_INFO_DATA + nested data */ 528 size += nla_total_size(sizeof(struct nlattr)) + 529 ops->get_size(dev); 530 531 if (ops->get_xstats_size) 532 /* IFLA_INFO_XSTATS */ 533 size += nla_total_size(ops->get_xstats_size(dev)); 534 535 size += rtnl_link_get_slave_info_data_size(dev); 536 537 return size; 538 } 539 540 static LIST_HEAD(rtnl_af_ops); 541 542 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 543 { 544 const struct rtnl_af_ops *ops; 545 546 ASSERT_RTNL(); 547 548 list_for_each_entry(ops, &rtnl_af_ops, list) { 549 if (ops->family == family) 550 return ops; 551 } 552 553 return NULL; 554 } 555 556 /** 557 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 558 * @ops: struct rtnl_af_ops * to register 559 * 560 * Returns 0 on success or a negative error code. 561 */ 562 void rtnl_af_register(struct rtnl_af_ops *ops) 563 { 564 rtnl_lock(); 565 list_add_tail_rcu(&ops->list, &rtnl_af_ops); 566 rtnl_unlock(); 567 } 568 EXPORT_SYMBOL_GPL(rtnl_af_register); 569 570 /** 571 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 572 * @ops: struct rtnl_af_ops * to unregister 573 */ 574 void rtnl_af_unregister(struct rtnl_af_ops *ops) 575 { 576 rtnl_lock(); 577 list_del_rcu(&ops->list); 578 rtnl_unlock(); 579 580 synchronize_rcu(); 581 } 582 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 583 584 static size_t rtnl_link_get_af_size(const struct net_device *dev, 585 u32 ext_filter_mask) 586 { 587 struct rtnl_af_ops *af_ops; 588 size_t size; 589 590 /* IFLA_AF_SPEC */ 591 size = nla_total_size(sizeof(struct nlattr)); 592 593 rcu_read_lock(); 594 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 595 if (af_ops->get_link_af_size) { 596 /* AF_* + nested data */ 597 size += nla_total_size(sizeof(struct nlattr)) + 598 af_ops->get_link_af_size(dev, ext_filter_mask); 599 } 600 } 601 rcu_read_unlock(); 602 603 return size; 604 } 605 606 static bool rtnl_have_link_slave_info(const struct net_device *dev) 607 { 608 struct net_device *master_dev; 609 bool ret = false; 610 611 rcu_read_lock(); 612 613 master_dev = netdev_master_upper_dev_get_rcu((struct net_device *)dev); 614 if (master_dev && master_dev->rtnl_link_ops) 615 ret = true; 616 rcu_read_unlock(); 617 return ret; 618 } 619 620 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 621 const struct net_device *dev) 622 { 623 struct net_device *master_dev; 624 const struct rtnl_link_ops *ops; 625 struct nlattr *slave_data; 626 int err; 627 628 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 629 if (!master_dev) 630 return 0; 631 ops = master_dev->rtnl_link_ops; 632 if (!ops) 633 return 0; 634 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 635 return -EMSGSIZE; 636 if (ops->fill_slave_info) { 637 slave_data = nla_nest_start_noflag(skb, IFLA_INFO_SLAVE_DATA); 638 if (!slave_data) 639 return -EMSGSIZE; 640 err = ops->fill_slave_info(skb, master_dev, dev); 641 if (err < 0) 642 goto err_cancel_slave_data; 643 nla_nest_end(skb, slave_data); 644 } 645 return 0; 646 647 err_cancel_slave_data: 648 nla_nest_cancel(skb, slave_data); 649 return err; 650 } 651 652 static int rtnl_link_info_fill(struct sk_buff *skb, 653 const struct net_device *dev) 654 { 655 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 656 struct nlattr *data; 657 int err; 658 659 if (!ops) 660 return 0; 661 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 662 return -EMSGSIZE; 663 if (ops->fill_xstats) { 664 err = ops->fill_xstats(skb, dev); 665 if (err < 0) 666 return err; 667 } 668 if (ops->fill_info) { 669 data = nla_nest_start_noflag(skb, IFLA_INFO_DATA); 670 if (data == NULL) 671 return -EMSGSIZE; 672 err = ops->fill_info(skb, dev); 673 if (err < 0) 674 goto err_cancel_data; 675 nla_nest_end(skb, data); 676 } 677 return 0; 678 679 err_cancel_data: 680 nla_nest_cancel(skb, data); 681 return err; 682 } 683 684 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 685 { 686 struct nlattr *linkinfo; 687 int err = -EMSGSIZE; 688 689 linkinfo = nla_nest_start_noflag(skb, IFLA_LINKINFO); 690 if (linkinfo == NULL) 691 goto out; 692 693 err = rtnl_link_info_fill(skb, dev); 694 if (err < 0) 695 goto err_cancel_link; 696 697 err = rtnl_link_slave_info_fill(skb, dev); 698 if (err < 0) 699 goto err_cancel_link; 700 701 nla_nest_end(skb, linkinfo); 702 return 0; 703 704 err_cancel_link: 705 nla_nest_cancel(skb, linkinfo); 706 out: 707 return err; 708 } 709 710 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 711 { 712 struct sock *rtnl = net->rtnl; 713 int err = 0; 714 715 NETLINK_CB(skb).dst_group = group; 716 if (echo) 717 refcount_inc(&skb->users); 718 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 719 if (echo) 720 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 721 return err; 722 } 723 724 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 725 { 726 struct sock *rtnl = net->rtnl; 727 728 return nlmsg_unicast(rtnl, skb, pid); 729 } 730 EXPORT_SYMBOL(rtnl_unicast); 731 732 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 733 struct nlmsghdr *nlh, gfp_t flags) 734 { 735 struct sock *rtnl = net->rtnl; 736 int report = 0; 737 738 if (nlh) 739 report = nlmsg_report(nlh); 740 741 nlmsg_notify(rtnl, skb, pid, group, report, flags); 742 } 743 EXPORT_SYMBOL(rtnl_notify); 744 745 void rtnl_set_sk_err(struct net *net, u32 group, int error) 746 { 747 struct sock *rtnl = net->rtnl; 748 749 netlink_set_err(rtnl, 0, group, error); 750 } 751 EXPORT_SYMBOL(rtnl_set_sk_err); 752 753 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 754 { 755 struct nlattr *mx; 756 int i, valid = 0; 757 758 /* nothing is dumped for dst_default_metrics, so just skip the loop */ 759 if (metrics == dst_default_metrics.metrics) 760 return 0; 761 762 mx = nla_nest_start_noflag(skb, RTA_METRICS); 763 if (mx == NULL) 764 return -ENOBUFS; 765 766 for (i = 0; i < RTAX_MAX; i++) { 767 if (metrics[i]) { 768 if (i == RTAX_CC_ALGO - 1) { 769 char tmp[TCP_CA_NAME_MAX], *name; 770 771 name = tcp_ca_get_name_by_key(metrics[i], tmp); 772 if (!name) 773 continue; 774 if (nla_put_string(skb, i + 1, name)) 775 goto nla_put_failure; 776 } else if (i == RTAX_FEATURES - 1) { 777 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 778 779 if (!user_features) 780 continue; 781 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 782 if (nla_put_u32(skb, i + 1, user_features)) 783 goto nla_put_failure; 784 } else { 785 if (nla_put_u32(skb, i + 1, metrics[i])) 786 goto nla_put_failure; 787 } 788 valid++; 789 } 790 } 791 792 if (!valid) { 793 nla_nest_cancel(skb, mx); 794 return 0; 795 } 796 797 return nla_nest_end(skb, mx); 798 799 nla_put_failure: 800 nla_nest_cancel(skb, mx); 801 return -EMSGSIZE; 802 } 803 EXPORT_SYMBOL(rtnetlink_put_metrics); 804 805 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 806 long expires, u32 error) 807 { 808 struct rta_cacheinfo ci = { 809 .rta_error = error, 810 .rta_id = id, 811 }; 812 813 if (dst) { 814 ci.rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse); 815 ci.rta_used = dst->__use; 816 ci.rta_clntref = atomic_read(&dst->__refcnt); 817 } 818 if (expires) { 819 unsigned long clock; 820 821 clock = jiffies_to_clock_t(abs(expires)); 822 clock = min_t(unsigned long, clock, INT_MAX); 823 ci.rta_expires = (expires > 0) ? clock : -clock; 824 } 825 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 826 } 827 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 828 829 static void set_operstate(struct net_device *dev, unsigned char transition) 830 { 831 unsigned char operstate = dev->operstate; 832 833 switch (transition) { 834 case IF_OPER_UP: 835 if ((operstate == IF_OPER_DORMANT || 836 operstate == IF_OPER_TESTING || 837 operstate == IF_OPER_UNKNOWN) && 838 !netif_dormant(dev) && !netif_testing(dev)) 839 operstate = IF_OPER_UP; 840 break; 841 842 case IF_OPER_TESTING: 843 if (operstate == IF_OPER_UP || 844 operstate == IF_OPER_UNKNOWN) 845 operstate = IF_OPER_TESTING; 846 break; 847 848 case IF_OPER_DORMANT: 849 if (operstate == IF_OPER_UP || 850 operstate == IF_OPER_UNKNOWN) 851 operstate = IF_OPER_DORMANT; 852 break; 853 } 854 855 if (dev->operstate != operstate) { 856 write_lock_bh(&dev_base_lock); 857 dev->operstate = operstate; 858 write_unlock_bh(&dev_base_lock); 859 netdev_state_change(dev); 860 } 861 } 862 863 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 864 { 865 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 866 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 867 } 868 869 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 870 const struct ifinfomsg *ifm) 871 { 872 unsigned int flags = ifm->ifi_flags; 873 874 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 875 if (ifm->ifi_change) 876 flags = (flags & ifm->ifi_change) | 877 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 878 879 return flags; 880 } 881 882 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 883 const struct rtnl_link_stats64 *b) 884 { 885 a->rx_packets = b->rx_packets; 886 a->tx_packets = b->tx_packets; 887 a->rx_bytes = b->rx_bytes; 888 a->tx_bytes = b->tx_bytes; 889 a->rx_errors = b->rx_errors; 890 a->tx_errors = b->tx_errors; 891 a->rx_dropped = b->rx_dropped; 892 a->tx_dropped = b->tx_dropped; 893 894 a->multicast = b->multicast; 895 a->collisions = b->collisions; 896 897 a->rx_length_errors = b->rx_length_errors; 898 a->rx_over_errors = b->rx_over_errors; 899 a->rx_crc_errors = b->rx_crc_errors; 900 a->rx_frame_errors = b->rx_frame_errors; 901 a->rx_fifo_errors = b->rx_fifo_errors; 902 a->rx_missed_errors = b->rx_missed_errors; 903 904 a->tx_aborted_errors = b->tx_aborted_errors; 905 a->tx_carrier_errors = b->tx_carrier_errors; 906 a->tx_fifo_errors = b->tx_fifo_errors; 907 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 908 a->tx_window_errors = b->tx_window_errors; 909 910 a->rx_compressed = b->rx_compressed; 911 a->tx_compressed = b->tx_compressed; 912 913 a->rx_nohandler = b->rx_nohandler; 914 } 915 916 /* All VF info */ 917 static inline int rtnl_vfinfo_size(const struct net_device *dev, 918 u32 ext_filter_mask) 919 { 920 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) { 921 int num_vfs = dev_num_vf(dev->dev.parent); 922 size_t size = nla_total_size(0); 923 size += num_vfs * 924 (nla_total_size(0) + 925 nla_total_size(sizeof(struct ifla_vf_mac)) + 926 nla_total_size(sizeof(struct ifla_vf_broadcast)) + 927 nla_total_size(sizeof(struct ifla_vf_vlan)) + 928 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ 929 nla_total_size(MAX_VLAN_LIST_LEN * 930 sizeof(struct ifla_vf_vlan_info)) + 931 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 932 nla_total_size(sizeof(struct ifla_vf_tx_rate)) + 933 nla_total_size(sizeof(struct ifla_vf_rate)) + 934 nla_total_size(sizeof(struct ifla_vf_link_state)) + 935 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 936 nla_total_size(0) + /* nest IFLA_VF_STATS */ 937 /* IFLA_VF_STATS_RX_PACKETS */ 938 nla_total_size_64bit(sizeof(__u64)) + 939 /* IFLA_VF_STATS_TX_PACKETS */ 940 nla_total_size_64bit(sizeof(__u64)) + 941 /* IFLA_VF_STATS_RX_BYTES */ 942 nla_total_size_64bit(sizeof(__u64)) + 943 /* IFLA_VF_STATS_TX_BYTES */ 944 nla_total_size_64bit(sizeof(__u64)) + 945 /* IFLA_VF_STATS_BROADCAST */ 946 nla_total_size_64bit(sizeof(__u64)) + 947 /* IFLA_VF_STATS_MULTICAST */ 948 nla_total_size_64bit(sizeof(__u64)) + 949 /* IFLA_VF_STATS_RX_DROPPED */ 950 nla_total_size_64bit(sizeof(__u64)) + 951 /* IFLA_VF_STATS_TX_DROPPED */ 952 nla_total_size_64bit(sizeof(__u64)) + 953 nla_total_size(sizeof(struct ifla_vf_trust))); 954 return size; 955 } else 956 return 0; 957 } 958 959 static size_t rtnl_port_size(const struct net_device *dev, 960 u32 ext_filter_mask) 961 { 962 size_t port_size = nla_total_size(4) /* PORT_VF */ 963 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 964 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 965 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 966 + nla_total_size(1) /* PROT_VDP_REQUEST */ 967 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 968 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 969 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 970 + port_size; 971 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 972 + port_size; 973 974 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 975 !(ext_filter_mask & RTEXT_FILTER_VF)) 976 return 0; 977 if (dev_num_vf(dev->dev.parent)) 978 return port_self_size + vf_ports_size + 979 vf_port_size * dev_num_vf(dev->dev.parent); 980 else 981 return port_self_size; 982 } 983 984 static size_t rtnl_xdp_size(void) 985 { 986 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ 987 nla_total_size(1) + /* XDP_ATTACHED */ 988 nla_total_size(4) + /* XDP_PROG_ID (or 1st mode) */ 989 nla_total_size(4); /* XDP_<mode>_PROG_ID */ 990 991 return xdp_size; 992 } 993 994 static size_t rtnl_prop_list_size(const struct net_device *dev) 995 { 996 struct netdev_name_node *name_node; 997 size_t size; 998 999 if (list_empty(&dev->name_node->list)) 1000 return 0; 1001 size = nla_total_size(0); 1002 list_for_each_entry(name_node, &dev->name_node->list, list) 1003 size += nla_total_size(ALTIFNAMSIZ); 1004 return size; 1005 } 1006 1007 static size_t rtnl_proto_down_size(const struct net_device *dev) 1008 { 1009 size_t size = nla_total_size(1); 1010 1011 if (dev->proto_down_reason) 1012 size += nla_total_size(0) + nla_total_size(4); 1013 1014 return size; 1015 } 1016 1017 static noinline size_t if_nlmsg_size(const struct net_device *dev, 1018 u32 ext_filter_mask) 1019 { 1020 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 1021 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 1022 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 1023 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 1024 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 1025 + nla_total_size(sizeof(struct rtnl_link_stats)) 1026 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 1027 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 1028 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 1029 + nla_total_size(4) /* IFLA_TXQLEN */ 1030 + nla_total_size(4) /* IFLA_WEIGHT */ 1031 + nla_total_size(4) /* IFLA_MTU */ 1032 + nla_total_size(4) /* IFLA_LINK */ 1033 + nla_total_size(4) /* IFLA_MASTER */ 1034 + nla_total_size(1) /* IFLA_CARRIER */ 1035 + nla_total_size(4) /* IFLA_PROMISCUITY */ 1036 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 1037 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 1038 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 1039 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 1040 + nla_total_size(1) /* IFLA_OPERSTATE */ 1041 + nla_total_size(1) /* IFLA_LINKMODE */ 1042 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 1043 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 1044 + nla_total_size(4) /* IFLA_GROUP */ 1045 + nla_total_size(ext_filter_mask 1046 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 1047 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 1048 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 1049 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 1050 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 1051 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 1052 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 1053 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 1054 + rtnl_xdp_size() /* IFLA_XDP */ 1055 + nla_total_size(4) /* IFLA_EVENT */ 1056 + nla_total_size(4) /* IFLA_NEW_NETNSID */ 1057 + nla_total_size(4) /* IFLA_NEW_IFINDEX */ 1058 + rtnl_proto_down_size(dev) /* proto down */ 1059 + nla_total_size(4) /* IFLA_TARGET_NETNSID */ 1060 + nla_total_size(4) /* IFLA_CARRIER_UP_COUNT */ 1061 + nla_total_size(4) /* IFLA_CARRIER_DOWN_COUNT */ 1062 + nla_total_size(4) /* IFLA_MIN_MTU */ 1063 + nla_total_size(4) /* IFLA_MAX_MTU */ 1064 + rtnl_prop_list_size(dev) 1065 + nla_total_size(MAX_ADDR_LEN) /* IFLA_PERM_ADDRESS */ 1066 + 0; 1067 } 1068 1069 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 1070 { 1071 struct nlattr *vf_ports; 1072 struct nlattr *vf_port; 1073 int vf; 1074 int err; 1075 1076 vf_ports = nla_nest_start_noflag(skb, IFLA_VF_PORTS); 1077 if (!vf_ports) 1078 return -EMSGSIZE; 1079 1080 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 1081 vf_port = nla_nest_start_noflag(skb, IFLA_VF_PORT); 1082 if (!vf_port) 1083 goto nla_put_failure; 1084 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 1085 goto nla_put_failure; 1086 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 1087 if (err == -EMSGSIZE) 1088 goto nla_put_failure; 1089 if (err) { 1090 nla_nest_cancel(skb, vf_port); 1091 continue; 1092 } 1093 nla_nest_end(skb, vf_port); 1094 } 1095 1096 nla_nest_end(skb, vf_ports); 1097 1098 return 0; 1099 1100 nla_put_failure: 1101 nla_nest_cancel(skb, vf_ports); 1102 return -EMSGSIZE; 1103 } 1104 1105 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 1106 { 1107 struct nlattr *port_self; 1108 int err; 1109 1110 port_self = nla_nest_start_noflag(skb, IFLA_PORT_SELF); 1111 if (!port_self) 1112 return -EMSGSIZE; 1113 1114 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 1115 if (err) { 1116 nla_nest_cancel(skb, port_self); 1117 return (err == -EMSGSIZE) ? err : 0; 1118 } 1119 1120 nla_nest_end(skb, port_self); 1121 1122 return 0; 1123 } 1124 1125 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1126 u32 ext_filter_mask) 1127 { 1128 int err; 1129 1130 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1131 !(ext_filter_mask & RTEXT_FILTER_VF)) 1132 return 0; 1133 1134 err = rtnl_port_self_fill(skb, dev); 1135 if (err) 1136 return err; 1137 1138 if (dev_num_vf(dev->dev.parent)) { 1139 err = rtnl_vf_ports_fill(skb, dev); 1140 if (err) 1141 return err; 1142 } 1143 1144 return 0; 1145 } 1146 1147 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1148 { 1149 int err; 1150 struct netdev_phys_item_id ppid; 1151 1152 err = dev_get_phys_port_id(dev, &ppid); 1153 if (err) { 1154 if (err == -EOPNOTSUPP) 1155 return 0; 1156 return err; 1157 } 1158 1159 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1160 return -EMSGSIZE; 1161 1162 return 0; 1163 } 1164 1165 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1166 { 1167 char name[IFNAMSIZ]; 1168 int err; 1169 1170 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1171 if (err) { 1172 if (err == -EOPNOTSUPP) 1173 return 0; 1174 return err; 1175 } 1176 1177 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name)) 1178 return -EMSGSIZE; 1179 1180 return 0; 1181 } 1182 1183 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1184 { 1185 struct netdev_phys_item_id ppid = { }; 1186 int err; 1187 1188 err = dev_get_port_parent_id(dev, &ppid, false); 1189 if (err) { 1190 if (err == -EOPNOTSUPP) 1191 return 0; 1192 return err; 1193 } 1194 1195 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, ppid.id_len, ppid.id)) 1196 return -EMSGSIZE; 1197 1198 return 0; 1199 } 1200 1201 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1202 struct net_device *dev) 1203 { 1204 struct rtnl_link_stats64 *sp; 1205 struct nlattr *attr; 1206 1207 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1208 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1209 if (!attr) 1210 return -EMSGSIZE; 1211 1212 sp = nla_data(attr); 1213 dev_get_stats(dev, sp); 1214 1215 attr = nla_reserve(skb, IFLA_STATS, 1216 sizeof(struct rtnl_link_stats)); 1217 if (!attr) 1218 return -EMSGSIZE; 1219 1220 copy_rtnl_link_stats(nla_data(attr), sp); 1221 1222 return 0; 1223 } 1224 1225 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1226 struct net_device *dev, 1227 int vfs_num, 1228 struct nlattr *vfinfo) 1229 { 1230 struct ifla_vf_rss_query_en vf_rss_query_en; 1231 struct nlattr *vf, *vfstats, *vfvlanlist; 1232 struct ifla_vf_link_state vf_linkstate; 1233 struct ifla_vf_vlan_info vf_vlan_info; 1234 struct ifla_vf_spoofchk vf_spoofchk; 1235 struct ifla_vf_tx_rate vf_tx_rate; 1236 struct ifla_vf_stats vf_stats; 1237 struct ifla_vf_trust vf_trust; 1238 struct ifla_vf_vlan vf_vlan; 1239 struct ifla_vf_rate vf_rate; 1240 struct ifla_vf_mac vf_mac; 1241 struct ifla_vf_broadcast vf_broadcast; 1242 struct ifla_vf_info ivi; 1243 struct ifla_vf_guid node_guid; 1244 struct ifla_vf_guid port_guid; 1245 1246 memset(&ivi, 0, sizeof(ivi)); 1247 1248 /* Not all SR-IOV capable drivers support the 1249 * spoofcheck and "RSS query enable" query. Preset to 1250 * -1 so the user space tool can detect that the driver 1251 * didn't report anything. 1252 */ 1253 ivi.spoofchk = -1; 1254 ivi.rss_query_en = -1; 1255 ivi.trusted = -1; 1256 /* The default value for VF link state is "auto" 1257 * IFLA_VF_LINK_STATE_AUTO which equals zero 1258 */ 1259 ivi.linkstate = 0; 1260 /* VLAN Protocol by default is 802.1Q */ 1261 ivi.vlan_proto = htons(ETH_P_8021Q); 1262 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1263 return 0; 1264 1265 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1266 memset(&node_guid, 0, sizeof(node_guid)); 1267 memset(&port_guid, 0, sizeof(port_guid)); 1268 1269 vf_mac.vf = 1270 vf_vlan.vf = 1271 vf_vlan_info.vf = 1272 vf_rate.vf = 1273 vf_tx_rate.vf = 1274 vf_spoofchk.vf = 1275 vf_linkstate.vf = 1276 vf_rss_query_en.vf = 1277 vf_trust.vf = 1278 node_guid.vf = 1279 port_guid.vf = ivi.vf; 1280 1281 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1282 memcpy(vf_broadcast.broadcast, dev->broadcast, dev->addr_len); 1283 vf_vlan.vlan = ivi.vlan; 1284 vf_vlan.qos = ivi.qos; 1285 vf_vlan_info.vlan = ivi.vlan; 1286 vf_vlan_info.qos = ivi.qos; 1287 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1288 vf_tx_rate.rate = ivi.max_tx_rate; 1289 vf_rate.min_tx_rate = ivi.min_tx_rate; 1290 vf_rate.max_tx_rate = ivi.max_tx_rate; 1291 vf_spoofchk.setting = ivi.spoofchk; 1292 vf_linkstate.link_state = ivi.linkstate; 1293 vf_rss_query_en.setting = ivi.rss_query_en; 1294 vf_trust.setting = ivi.trusted; 1295 vf = nla_nest_start_noflag(skb, IFLA_VF_INFO); 1296 if (!vf) 1297 goto nla_put_vfinfo_failure; 1298 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1299 nla_put(skb, IFLA_VF_BROADCAST, sizeof(vf_broadcast), &vf_broadcast) || 1300 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1301 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1302 &vf_rate) || 1303 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1304 &vf_tx_rate) || 1305 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1306 &vf_spoofchk) || 1307 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1308 &vf_linkstate) || 1309 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1310 sizeof(vf_rss_query_en), 1311 &vf_rss_query_en) || 1312 nla_put(skb, IFLA_VF_TRUST, 1313 sizeof(vf_trust), &vf_trust)) 1314 goto nla_put_vf_failure; 1315 1316 if (dev->netdev_ops->ndo_get_vf_guid && 1317 !dev->netdev_ops->ndo_get_vf_guid(dev, vfs_num, &node_guid, 1318 &port_guid)) { 1319 if (nla_put(skb, IFLA_VF_IB_NODE_GUID, sizeof(node_guid), 1320 &node_guid) || 1321 nla_put(skb, IFLA_VF_IB_PORT_GUID, sizeof(port_guid), 1322 &port_guid)) 1323 goto nla_put_vf_failure; 1324 } 1325 vfvlanlist = nla_nest_start_noflag(skb, IFLA_VF_VLAN_LIST); 1326 if (!vfvlanlist) 1327 goto nla_put_vf_failure; 1328 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1329 &vf_vlan_info)) { 1330 nla_nest_cancel(skb, vfvlanlist); 1331 goto nla_put_vf_failure; 1332 } 1333 nla_nest_end(skb, vfvlanlist); 1334 memset(&vf_stats, 0, sizeof(vf_stats)); 1335 if (dev->netdev_ops->ndo_get_vf_stats) 1336 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1337 &vf_stats); 1338 vfstats = nla_nest_start_noflag(skb, IFLA_VF_STATS); 1339 if (!vfstats) 1340 goto nla_put_vf_failure; 1341 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1342 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1343 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1344 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1345 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1346 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1347 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1348 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1349 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1350 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1351 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1352 vf_stats.multicast, IFLA_VF_STATS_PAD) || 1353 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_DROPPED, 1354 vf_stats.rx_dropped, IFLA_VF_STATS_PAD) || 1355 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_DROPPED, 1356 vf_stats.tx_dropped, IFLA_VF_STATS_PAD)) { 1357 nla_nest_cancel(skb, vfstats); 1358 goto nla_put_vf_failure; 1359 } 1360 nla_nest_end(skb, vfstats); 1361 nla_nest_end(skb, vf); 1362 return 0; 1363 1364 nla_put_vf_failure: 1365 nla_nest_cancel(skb, vf); 1366 nla_put_vfinfo_failure: 1367 nla_nest_cancel(skb, vfinfo); 1368 return -EMSGSIZE; 1369 } 1370 1371 static noinline_for_stack int rtnl_fill_vf(struct sk_buff *skb, 1372 struct net_device *dev, 1373 u32 ext_filter_mask) 1374 { 1375 struct nlattr *vfinfo; 1376 int i, num_vfs; 1377 1378 if (!dev->dev.parent || ((ext_filter_mask & RTEXT_FILTER_VF) == 0)) 1379 return 0; 1380 1381 num_vfs = dev_num_vf(dev->dev.parent); 1382 if (nla_put_u32(skb, IFLA_NUM_VF, num_vfs)) 1383 return -EMSGSIZE; 1384 1385 if (!dev->netdev_ops->ndo_get_vf_config) 1386 return 0; 1387 1388 vfinfo = nla_nest_start_noflag(skb, IFLA_VFINFO_LIST); 1389 if (!vfinfo) 1390 return -EMSGSIZE; 1391 1392 for (i = 0; i < num_vfs; i++) { 1393 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1394 return -EMSGSIZE; 1395 } 1396 1397 nla_nest_end(skb, vfinfo); 1398 return 0; 1399 } 1400 1401 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1402 { 1403 struct rtnl_link_ifmap map; 1404 1405 memset(&map, 0, sizeof(map)); 1406 map.mem_start = dev->mem_start; 1407 map.mem_end = dev->mem_end; 1408 map.base_addr = dev->base_addr; 1409 map.irq = dev->irq; 1410 map.dma = dev->dma; 1411 map.port = dev->if_port; 1412 1413 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1414 return -EMSGSIZE; 1415 1416 return 0; 1417 } 1418 1419 static u32 rtnl_xdp_prog_skb(struct net_device *dev) 1420 { 1421 const struct bpf_prog *generic_xdp_prog; 1422 1423 ASSERT_RTNL(); 1424 1425 generic_xdp_prog = rtnl_dereference(dev->xdp_prog); 1426 if (!generic_xdp_prog) 1427 return 0; 1428 return generic_xdp_prog->aux->id; 1429 } 1430 1431 static u32 rtnl_xdp_prog_drv(struct net_device *dev) 1432 { 1433 return dev_xdp_prog_id(dev, XDP_MODE_DRV); 1434 } 1435 1436 static u32 rtnl_xdp_prog_hw(struct net_device *dev) 1437 { 1438 return dev_xdp_prog_id(dev, XDP_MODE_HW); 1439 } 1440 1441 static int rtnl_xdp_report_one(struct sk_buff *skb, struct net_device *dev, 1442 u32 *prog_id, u8 *mode, u8 tgt_mode, u32 attr, 1443 u32 (*get_prog_id)(struct net_device *dev)) 1444 { 1445 u32 curr_id; 1446 int err; 1447 1448 curr_id = get_prog_id(dev); 1449 if (!curr_id) 1450 return 0; 1451 1452 *prog_id = curr_id; 1453 err = nla_put_u32(skb, attr, curr_id); 1454 if (err) 1455 return err; 1456 1457 if (*mode != XDP_ATTACHED_NONE) 1458 *mode = XDP_ATTACHED_MULTI; 1459 else 1460 *mode = tgt_mode; 1461 1462 return 0; 1463 } 1464 1465 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1466 { 1467 struct nlattr *xdp; 1468 u32 prog_id; 1469 int err; 1470 u8 mode; 1471 1472 xdp = nla_nest_start_noflag(skb, IFLA_XDP); 1473 if (!xdp) 1474 return -EMSGSIZE; 1475 1476 prog_id = 0; 1477 mode = XDP_ATTACHED_NONE; 1478 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_SKB, 1479 IFLA_XDP_SKB_PROG_ID, rtnl_xdp_prog_skb); 1480 if (err) 1481 goto err_cancel; 1482 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_DRV, 1483 IFLA_XDP_DRV_PROG_ID, rtnl_xdp_prog_drv); 1484 if (err) 1485 goto err_cancel; 1486 err = rtnl_xdp_report_one(skb, dev, &prog_id, &mode, XDP_ATTACHED_HW, 1487 IFLA_XDP_HW_PROG_ID, rtnl_xdp_prog_hw); 1488 if (err) 1489 goto err_cancel; 1490 1491 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode); 1492 if (err) 1493 goto err_cancel; 1494 1495 if (prog_id && mode != XDP_ATTACHED_MULTI) { 1496 err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id); 1497 if (err) 1498 goto err_cancel; 1499 } 1500 1501 nla_nest_end(skb, xdp); 1502 return 0; 1503 1504 err_cancel: 1505 nla_nest_cancel(skb, xdp); 1506 return err; 1507 } 1508 1509 static u32 rtnl_get_event(unsigned long event) 1510 { 1511 u32 rtnl_event_type = IFLA_EVENT_NONE; 1512 1513 switch (event) { 1514 case NETDEV_REBOOT: 1515 rtnl_event_type = IFLA_EVENT_REBOOT; 1516 break; 1517 case NETDEV_FEAT_CHANGE: 1518 rtnl_event_type = IFLA_EVENT_FEATURES; 1519 break; 1520 case NETDEV_BONDING_FAILOVER: 1521 rtnl_event_type = IFLA_EVENT_BONDING_FAILOVER; 1522 break; 1523 case NETDEV_NOTIFY_PEERS: 1524 rtnl_event_type = IFLA_EVENT_NOTIFY_PEERS; 1525 break; 1526 case NETDEV_RESEND_IGMP: 1527 rtnl_event_type = IFLA_EVENT_IGMP_RESEND; 1528 break; 1529 case NETDEV_CHANGEINFODATA: 1530 rtnl_event_type = IFLA_EVENT_BONDING_OPTIONS; 1531 break; 1532 default: 1533 break; 1534 } 1535 1536 return rtnl_event_type; 1537 } 1538 1539 static int put_master_ifindex(struct sk_buff *skb, struct net_device *dev) 1540 { 1541 const struct net_device *upper_dev; 1542 int ret = 0; 1543 1544 rcu_read_lock(); 1545 1546 upper_dev = netdev_master_upper_dev_get_rcu(dev); 1547 if (upper_dev) 1548 ret = nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex); 1549 1550 rcu_read_unlock(); 1551 return ret; 1552 } 1553 1554 static int nla_put_iflink(struct sk_buff *skb, const struct net_device *dev, 1555 bool force) 1556 { 1557 int ifindex = dev_get_iflink(dev); 1558 1559 if (force || dev->ifindex != ifindex) 1560 return nla_put_u32(skb, IFLA_LINK, ifindex); 1561 1562 return 0; 1563 } 1564 1565 static noinline_for_stack int nla_put_ifalias(struct sk_buff *skb, 1566 struct net_device *dev) 1567 { 1568 char buf[IFALIASZ]; 1569 int ret; 1570 1571 ret = dev_get_alias(dev, buf, sizeof(buf)); 1572 return ret > 0 ? nla_put_string(skb, IFLA_IFALIAS, buf) : 0; 1573 } 1574 1575 static int rtnl_fill_link_netnsid(struct sk_buff *skb, 1576 const struct net_device *dev, 1577 struct net *src_net, gfp_t gfp) 1578 { 1579 bool put_iflink = false; 1580 1581 if (dev->rtnl_link_ops && dev->rtnl_link_ops->get_link_net) { 1582 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1583 1584 if (!net_eq(dev_net(dev), link_net)) { 1585 int id = peernet2id_alloc(src_net, link_net, gfp); 1586 1587 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1588 return -EMSGSIZE; 1589 1590 put_iflink = true; 1591 } 1592 } 1593 1594 return nla_put_iflink(skb, dev, put_iflink); 1595 } 1596 1597 static int rtnl_fill_link_af(struct sk_buff *skb, 1598 const struct net_device *dev, 1599 u32 ext_filter_mask) 1600 { 1601 const struct rtnl_af_ops *af_ops; 1602 struct nlattr *af_spec; 1603 1604 af_spec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 1605 if (!af_spec) 1606 return -EMSGSIZE; 1607 1608 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 1609 struct nlattr *af; 1610 int err; 1611 1612 if (!af_ops->fill_link_af) 1613 continue; 1614 1615 af = nla_nest_start_noflag(skb, af_ops->family); 1616 if (!af) 1617 return -EMSGSIZE; 1618 1619 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1620 /* 1621 * Caller may return ENODATA to indicate that there 1622 * was no data to be dumped. This is not an error, it 1623 * means we should trim the attribute header and 1624 * continue. 1625 */ 1626 if (err == -ENODATA) 1627 nla_nest_cancel(skb, af); 1628 else if (err < 0) 1629 return -EMSGSIZE; 1630 1631 nla_nest_end(skb, af); 1632 } 1633 1634 nla_nest_end(skb, af_spec); 1635 return 0; 1636 } 1637 1638 static int rtnl_fill_alt_ifnames(struct sk_buff *skb, 1639 const struct net_device *dev) 1640 { 1641 struct netdev_name_node *name_node; 1642 int count = 0; 1643 1644 list_for_each_entry(name_node, &dev->name_node->list, list) { 1645 if (nla_put_string(skb, IFLA_ALT_IFNAME, name_node->name)) 1646 return -EMSGSIZE; 1647 count++; 1648 } 1649 return count; 1650 } 1651 1652 static int rtnl_fill_prop_list(struct sk_buff *skb, 1653 const struct net_device *dev) 1654 { 1655 struct nlattr *prop_list; 1656 int ret; 1657 1658 prop_list = nla_nest_start(skb, IFLA_PROP_LIST); 1659 if (!prop_list) 1660 return -EMSGSIZE; 1661 1662 ret = rtnl_fill_alt_ifnames(skb, dev); 1663 if (ret <= 0) 1664 goto nest_cancel; 1665 1666 nla_nest_end(skb, prop_list); 1667 return 0; 1668 1669 nest_cancel: 1670 nla_nest_cancel(skb, prop_list); 1671 return ret; 1672 } 1673 1674 static int rtnl_fill_proto_down(struct sk_buff *skb, 1675 const struct net_device *dev) 1676 { 1677 struct nlattr *pr; 1678 u32 preason; 1679 1680 if (nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1681 goto nla_put_failure; 1682 1683 preason = dev->proto_down_reason; 1684 if (!preason) 1685 return 0; 1686 1687 pr = nla_nest_start(skb, IFLA_PROTO_DOWN_REASON); 1688 if (!pr) 1689 return -EMSGSIZE; 1690 1691 if (nla_put_u32(skb, IFLA_PROTO_DOWN_REASON_VALUE, preason)) { 1692 nla_nest_cancel(skb, pr); 1693 goto nla_put_failure; 1694 } 1695 1696 nla_nest_end(skb, pr); 1697 return 0; 1698 1699 nla_put_failure: 1700 return -EMSGSIZE; 1701 } 1702 1703 static int rtnl_fill_ifinfo(struct sk_buff *skb, 1704 struct net_device *dev, struct net *src_net, 1705 int type, u32 pid, u32 seq, u32 change, 1706 unsigned int flags, u32 ext_filter_mask, 1707 u32 event, int *new_nsid, int new_ifindex, 1708 int tgt_netnsid, gfp_t gfp) 1709 { 1710 struct ifinfomsg *ifm; 1711 struct nlmsghdr *nlh; 1712 1713 ASSERT_RTNL(); 1714 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1715 if (nlh == NULL) 1716 return -EMSGSIZE; 1717 1718 ifm = nlmsg_data(nlh); 1719 ifm->ifi_family = AF_UNSPEC; 1720 ifm->__ifi_pad = 0; 1721 ifm->ifi_type = dev->type; 1722 ifm->ifi_index = dev->ifindex; 1723 ifm->ifi_flags = dev_get_flags(dev); 1724 ifm->ifi_change = change; 1725 1726 if (tgt_netnsid >= 0 && nla_put_s32(skb, IFLA_TARGET_NETNSID, tgt_netnsid)) 1727 goto nla_put_failure; 1728 1729 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1730 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1731 nla_put_u8(skb, IFLA_OPERSTATE, 1732 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1733 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1734 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1735 nla_put_u32(skb, IFLA_MIN_MTU, dev->min_mtu) || 1736 nla_put_u32(skb, IFLA_MAX_MTU, dev->max_mtu) || 1737 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1738 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1739 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1740 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1741 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1742 #ifdef CONFIG_RPS 1743 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1744 #endif 1745 put_master_ifindex(skb, dev) || 1746 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1747 (dev->qdisc && 1748 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1749 nla_put_ifalias(skb, dev) || 1750 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1751 atomic_read(&dev->carrier_up_count) + 1752 atomic_read(&dev->carrier_down_count)) || 1753 nla_put_u32(skb, IFLA_CARRIER_UP_COUNT, 1754 atomic_read(&dev->carrier_up_count)) || 1755 nla_put_u32(skb, IFLA_CARRIER_DOWN_COUNT, 1756 atomic_read(&dev->carrier_down_count))) 1757 goto nla_put_failure; 1758 1759 if (rtnl_fill_proto_down(skb, dev)) 1760 goto nla_put_failure; 1761 1762 if (event != IFLA_EVENT_NONE) { 1763 if (nla_put_u32(skb, IFLA_EVENT, event)) 1764 goto nla_put_failure; 1765 } 1766 1767 if (rtnl_fill_link_ifmap(skb, dev)) 1768 goto nla_put_failure; 1769 1770 if (dev->addr_len) { 1771 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1772 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1773 goto nla_put_failure; 1774 } 1775 1776 if (rtnl_phys_port_id_fill(skb, dev)) 1777 goto nla_put_failure; 1778 1779 if (rtnl_phys_port_name_fill(skb, dev)) 1780 goto nla_put_failure; 1781 1782 if (rtnl_phys_switch_id_fill(skb, dev)) 1783 goto nla_put_failure; 1784 1785 if (rtnl_fill_stats(skb, dev)) 1786 goto nla_put_failure; 1787 1788 if (rtnl_fill_vf(skb, dev, ext_filter_mask)) 1789 goto nla_put_failure; 1790 1791 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1792 goto nla_put_failure; 1793 1794 if (rtnl_xdp_fill(skb, dev)) 1795 goto nla_put_failure; 1796 1797 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1798 if (rtnl_link_fill(skb, dev) < 0) 1799 goto nla_put_failure; 1800 } 1801 1802 if (rtnl_fill_link_netnsid(skb, dev, src_net, gfp)) 1803 goto nla_put_failure; 1804 1805 if (new_nsid && 1806 nla_put_s32(skb, IFLA_NEW_NETNSID, *new_nsid) < 0) 1807 goto nla_put_failure; 1808 if (new_ifindex && 1809 nla_put_s32(skb, IFLA_NEW_IFINDEX, new_ifindex) < 0) 1810 goto nla_put_failure; 1811 1812 if (memchr_inv(dev->perm_addr, '\0', dev->addr_len) && 1813 nla_put(skb, IFLA_PERM_ADDRESS, dev->addr_len, dev->perm_addr)) 1814 goto nla_put_failure; 1815 1816 rcu_read_lock(); 1817 if (rtnl_fill_link_af(skb, dev, ext_filter_mask)) 1818 goto nla_put_failure_rcu; 1819 rcu_read_unlock(); 1820 1821 if (rtnl_fill_prop_list(skb, dev)) 1822 goto nla_put_failure; 1823 1824 if (dev->dev.parent && 1825 nla_put_string(skb, IFLA_PARENT_DEV_NAME, 1826 dev_name(dev->dev.parent))) 1827 goto nla_put_failure; 1828 1829 if (dev->dev.parent && dev->dev.parent->bus && 1830 nla_put_string(skb, IFLA_PARENT_DEV_BUS_NAME, 1831 dev->dev.parent->bus->name)) 1832 goto nla_put_failure; 1833 1834 nlmsg_end(skb, nlh); 1835 return 0; 1836 1837 nla_put_failure_rcu: 1838 rcu_read_unlock(); 1839 nla_put_failure: 1840 nlmsg_cancel(skb, nlh); 1841 return -EMSGSIZE; 1842 } 1843 1844 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1845 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1846 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1847 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1848 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1849 [IFLA_MTU] = { .type = NLA_U32 }, 1850 [IFLA_LINK] = { .type = NLA_U32 }, 1851 [IFLA_MASTER] = { .type = NLA_U32 }, 1852 [IFLA_CARRIER] = { .type = NLA_U8 }, 1853 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1854 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1855 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1856 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1857 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1858 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1859 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1860 /* IFLA_IFALIAS is a string, but policy is set to NLA_BINARY to 1861 * allow 0-length string (needed to remove an alias). 1862 */ 1863 [IFLA_IFALIAS] = { .type = NLA_BINARY, .len = IFALIASZ - 1 }, 1864 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1865 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1866 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1867 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1868 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1869 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1870 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1871 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1872 [IFLA_GSO_MAX_SEGS] = { .type = NLA_U32 }, 1873 [IFLA_GSO_MAX_SIZE] = { .type = NLA_U32 }, 1874 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1875 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1876 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1877 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1878 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1879 [IFLA_XDP] = { .type = NLA_NESTED }, 1880 [IFLA_EVENT] = { .type = NLA_U32 }, 1881 [IFLA_GROUP] = { .type = NLA_U32 }, 1882 [IFLA_TARGET_NETNSID] = { .type = NLA_S32 }, 1883 [IFLA_CARRIER_UP_COUNT] = { .type = NLA_U32 }, 1884 [IFLA_CARRIER_DOWN_COUNT] = { .type = NLA_U32 }, 1885 [IFLA_MIN_MTU] = { .type = NLA_U32 }, 1886 [IFLA_MAX_MTU] = { .type = NLA_U32 }, 1887 [IFLA_PROP_LIST] = { .type = NLA_NESTED }, 1888 [IFLA_ALT_IFNAME] = { .type = NLA_STRING, 1889 .len = ALTIFNAMSIZ - 1 }, 1890 [IFLA_PERM_ADDRESS] = { .type = NLA_REJECT }, 1891 [IFLA_PROTO_DOWN_REASON] = { .type = NLA_NESTED }, 1892 [IFLA_NEW_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1), 1893 [IFLA_PARENT_DEV_NAME] = { .type = NLA_NUL_STRING }, 1894 }; 1895 1896 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1897 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1898 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1899 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1900 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1901 }; 1902 1903 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1904 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1905 [IFLA_VF_BROADCAST] = { .type = NLA_REJECT }, 1906 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1907 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1908 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1909 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1910 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1911 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1912 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1913 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1914 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1915 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1916 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1917 }; 1918 1919 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1920 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1921 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1922 .len = PORT_PROFILE_MAX }, 1923 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1924 .len = PORT_UUID_MAX }, 1925 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1926 .len = PORT_UUID_MAX }, 1927 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1928 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1929 1930 /* Unused, but we need to keep it here since user space could 1931 * fill it. It's also broken with regard to NLA_BINARY use in 1932 * combination with structs. 1933 */ 1934 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1935 .len = sizeof(struct ifla_port_vsi) }, 1936 }; 1937 1938 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1939 [IFLA_XDP_UNSPEC] = { .strict_start_type = IFLA_XDP_EXPECTED_FD }, 1940 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1941 [IFLA_XDP_EXPECTED_FD] = { .type = NLA_S32 }, 1942 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1943 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1944 [IFLA_XDP_PROG_ID] = { .type = NLA_U32 }, 1945 }; 1946 1947 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1948 { 1949 const struct rtnl_link_ops *ops = NULL; 1950 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1951 1952 if (nla_parse_nested_deprecated(linfo, IFLA_INFO_MAX, nla, ifla_info_policy, NULL) < 0) 1953 return NULL; 1954 1955 if (linfo[IFLA_INFO_KIND]) { 1956 char kind[MODULE_NAME_LEN]; 1957 1958 nla_strscpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1959 ops = rtnl_link_ops_get(kind); 1960 } 1961 1962 return ops; 1963 } 1964 1965 static bool link_master_filtered(struct net_device *dev, int master_idx) 1966 { 1967 struct net_device *master; 1968 1969 if (!master_idx) 1970 return false; 1971 1972 master = netdev_master_upper_dev_get(dev); 1973 if (!master || master->ifindex != master_idx) 1974 return true; 1975 1976 return false; 1977 } 1978 1979 static bool link_kind_filtered(const struct net_device *dev, 1980 const struct rtnl_link_ops *kind_ops) 1981 { 1982 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1983 return true; 1984 1985 return false; 1986 } 1987 1988 static bool link_dump_filtered(struct net_device *dev, 1989 int master_idx, 1990 const struct rtnl_link_ops *kind_ops) 1991 { 1992 if (link_master_filtered(dev, master_idx) || 1993 link_kind_filtered(dev, kind_ops)) 1994 return true; 1995 1996 return false; 1997 } 1998 1999 /** 2000 * rtnl_get_net_ns_capable - Get netns if sufficiently privileged. 2001 * @sk: netlink socket 2002 * @netnsid: network namespace identifier 2003 * 2004 * Returns the network namespace identified by netnsid on success or an error 2005 * pointer on failure. 2006 */ 2007 struct net *rtnl_get_net_ns_capable(struct sock *sk, int netnsid) 2008 { 2009 struct net *net; 2010 2011 net = get_net_ns_by_id(sock_net(sk), netnsid); 2012 if (!net) 2013 return ERR_PTR(-EINVAL); 2014 2015 /* For now, the caller is required to have CAP_NET_ADMIN in 2016 * the user namespace owning the target net ns. 2017 */ 2018 if (!sk_ns_capable(sk, net->user_ns, CAP_NET_ADMIN)) { 2019 put_net(net); 2020 return ERR_PTR(-EACCES); 2021 } 2022 return net; 2023 } 2024 EXPORT_SYMBOL_GPL(rtnl_get_net_ns_capable); 2025 2026 static int rtnl_valid_dump_ifinfo_req(const struct nlmsghdr *nlh, 2027 bool strict_check, struct nlattr **tb, 2028 struct netlink_ext_ack *extack) 2029 { 2030 int hdrlen; 2031 2032 if (strict_check) { 2033 struct ifinfomsg *ifm; 2034 2035 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 2036 NL_SET_ERR_MSG(extack, "Invalid header for link dump"); 2037 return -EINVAL; 2038 } 2039 2040 ifm = nlmsg_data(nlh); 2041 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 2042 ifm->ifi_change) { 2043 NL_SET_ERR_MSG(extack, "Invalid values in header for link dump request"); 2044 return -EINVAL; 2045 } 2046 if (ifm->ifi_index) { 2047 NL_SET_ERR_MSG(extack, "Filter by device index not supported for link dumps"); 2048 return -EINVAL; 2049 } 2050 2051 return nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, 2052 IFLA_MAX, ifla_policy, 2053 extack); 2054 } 2055 2056 /* A hack to preserve kernel<->userspace interface. 2057 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 2058 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 2059 * what iproute2 < v3.9.0 used. 2060 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 2061 * attribute, its netlink message is shorter than struct ifinfomsg. 2062 */ 2063 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2064 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2065 2066 return nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, 2067 extack); 2068 } 2069 2070 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 2071 { 2072 struct netlink_ext_ack *extack = cb->extack; 2073 const struct nlmsghdr *nlh = cb->nlh; 2074 struct net *net = sock_net(skb->sk); 2075 struct net *tgt_net = net; 2076 int h, s_h; 2077 int idx = 0, s_idx; 2078 struct net_device *dev; 2079 struct hlist_head *head; 2080 struct nlattr *tb[IFLA_MAX+1]; 2081 u32 ext_filter_mask = 0; 2082 const struct rtnl_link_ops *kind_ops = NULL; 2083 unsigned int flags = NLM_F_MULTI; 2084 int master_idx = 0; 2085 int netnsid = -1; 2086 int err, i; 2087 2088 s_h = cb->args[0]; 2089 s_idx = cb->args[1]; 2090 2091 err = rtnl_valid_dump_ifinfo_req(nlh, cb->strict_check, tb, extack); 2092 if (err < 0) { 2093 if (cb->strict_check) 2094 return err; 2095 2096 goto walk_entries; 2097 } 2098 2099 for (i = 0; i <= IFLA_MAX; ++i) { 2100 if (!tb[i]) 2101 continue; 2102 2103 /* new attributes should only be added with strict checking */ 2104 switch (i) { 2105 case IFLA_TARGET_NETNSID: 2106 netnsid = nla_get_s32(tb[i]); 2107 tgt_net = rtnl_get_net_ns_capable(skb->sk, netnsid); 2108 if (IS_ERR(tgt_net)) { 2109 NL_SET_ERR_MSG(extack, "Invalid target network namespace id"); 2110 return PTR_ERR(tgt_net); 2111 } 2112 break; 2113 case IFLA_EXT_MASK: 2114 ext_filter_mask = nla_get_u32(tb[i]); 2115 break; 2116 case IFLA_MASTER: 2117 master_idx = nla_get_u32(tb[i]); 2118 break; 2119 case IFLA_LINKINFO: 2120 kind_ops = linkinfo_to_kind_ops(tb[i]); 2121 break; 2122 default: 2123 if (cb->strict_check) { 2124 NL_SET_ERR_MSG(extack, "Unsupported attribute in link dump request"); 2125 return -EINVAL; 2126 } 2127 } 2128 } 2129 2130 if (master_idx || kind_ops) 2131 flags |= NLM_F_DUMP_FILTERED; 2132 2133 walk_entries: 2134 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 2135 idx = 0; 2136 head = &tgt_net->dev_index_head[h]; 2137 hlist_for_each_entry(dev, head, index_hlist) { 2138 if (link_dump_filtered(dev, master_idx, kind_ops)) 2139 goto cont; 2140 if (idx < s_idx) 2141 goto cont; 2142 err = rtnl_fill_ifinfo(skb, dev, net, 2143 RTM_NEWLINK, 2144 NETLINK_CB(cb->skb).portid, 2145 nlh->nlmsg_seq, 0, flags, 2146 ext_filter_mask, 0, NULL, 0, 2147 netnsid, GFP_KERNEL); 2148 2149 if (err < 0) { 2150 if (likely(skb->len)) 2151 goto out; 2152 2153 goto out_err; 2154 } 2155 cont: 2156 idx++; 2157 } 2158 } 2159 out: 2160 err = skb->len; 2161 out_err: 2162 cb->args[1] = idx; 2163 cb->args[0] = h; 2164 cb->seq = tgt_net->dev_base_seq; 2165 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 2166 if (netnsid >= 0) 2167 put_net(tgt_net); 2168 2169 return err; 2170 } 2171 2172 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 2173 struct netlink_ext_ack *exterr) 2174 { 2175 return nla_parse_deprecated(tb, IFLA_MAX, head, len, ifla_policy, 2176 exterr); 2177 } 2178 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 2179 2180 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 2181 { 2182 struct net *net; 2183 /* Examine the link attributes and figure out which 2184 * network namespace we are talking about. 2185 */ 2186 if (tb[IFLA_NET_NS_PID]) 2187 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 2188 else if (tb[IFLA_NET_NS_FD]) 2189 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 2190 else 2191 net = get_net(src_net); 2192 return net; 2193 } 2194 EXPORT_SYMBOL(rtnl_link_get_net); 2195 2196 /* Figure out which network namespace we are talking about by 2197 * examining the link attributes in the following order: 2198 * 2199 * 1. IFLA_NET_NS_PID 2200 * 2. IFLA_NET_NS_FD 2201 * 3. IFLA_TARGET_NETNSID 2202 */ 2203 static struct net *rtnl_link_get_net_by_nlattr(struct net *src_net, 2204 struct nlattr *tb[]) 2205 { 2206 struct net *net; 2207 2208 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) 2209 return rtnl_link_get_net(src_net, tb); 2210 2211 if (!tb[IFLA_TARGET_NETNSID]) 2212 return get_net(src_net); 2213 2214 net = get_net_ns_by_id(src_net, nla_get_u32(tb[IFLA_TARGET_NETNSID])); 2215 if (!net) 2216 return ERR_PTR(-EINVAL); 2217 2218 return net; 2219 } 2220 2221 static struct net *rtnl_link_get_net_capable(const struct sk_buff *skb, 2222 struct net *src_net, 2223 struct nlattr *tb[], int cap) 2224 { 2225 struct net *net; 2226 2227 net = rtnl_link_get_net_by_nlattr(src_net, tb); 2228 if (IS_ERR(net)) 2229 return net; 2230 2231 if (!netlink_ns_capable(skb, net->user_ns, cap)) { 2232 put_net(net); 2233 return ERR_PTR(-EPERM); 2234 } 2235 2236 return net; 2237 } 2238 2239 /* Verify that rtnetlink requests do not pass additional properties 2240 * potentially referring to different network namespaces. 2241 */ 2242 static int rtnl_ensure_unique_netns(struct nlattr *tb[], 2243 struct netlink_ext_ack *extack, 2244 bool netns_id_only) 2245 { 2246 2247 if (netns_id_only) { 2248 if (!tb[IFLA_NET_NS_PID] && !tb[IFLA_NET_NS_FD]) 2249 return 0; 2250 2251 NL_SET_ERR_MSG(extack, "specified netns attribute not supported"); 2252 return -EOPNOTSUPP; 2253 } 2254 2255 if (tb[IFLA_TARGET_NETNSID] && (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD])) 2256 goto invalid_attr; 2257 2258 if (tb[IFLA_NET_NS_PID] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_FD])) 2259 goto invalid_attr; 2260 2261 if (tb[IFLA_NET_NS_FD] && (tb[IFLA_TARGET_NETNSID] || tb[IFLA_NET_NS_PID])) 2262 goto invalid_attr; 2263 2264 return 0; 2265 2266 invalid_attr: 2267 NL_SET_ERR_MSG(extack, "multiple netns identifying attributes specified"); 2268 return -EINVAL; 2269 } 2270 2271 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 2272 { 2273 if (dev) { 2274 if (tb[IFLA_ADDRESS] && 2275 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 2276 return -EINVAL; 2277 2278 if (tb[IFLA_BROADCAST] && 2279 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 2280 return -EINVAL; 2281 } 2282 2283 if (tb[IFLA_AF_SPEC]) { 2284 struct nlattr *af; 2285 int rem, err; 2286 2287 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2288 const struct rtnl_af_ops *af_ops; 2289 2290 af_ops = rtnl_af_lookup(nla_type(af)); 2291 if (!af_ops) 2292 return -EAFNOSUPPORT; 2293 2294 if (!af_ops->set_link_af) 2295 return -EOPNOTSUPP; 2296 2297 if (af_ops->validate_link_af) { 2298 err = af_ops->validate_link_af(dev, af); 2299 if (err < 0) 2300 return err; 2301 } 2302 } 2303 } 2304 2305 return 0; 2306 } 2307 2308 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 2309 int guid_type) 2310 { 2311 const struct net_device_ops *ops = dev->netdev_ops; 2312 2313 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 2314 } 2315 2316 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 2317 { 2318 if (dev->type != ARPHRD_INFINIBAND) 2319 return -EOPNOTSUPP; 2320 2321 return handle_infiniband_guid(dev, ivt, guid_type); 2322 } 2323 2324 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 2325 { 2326 const struct net_device_ops *ops = dev->netdev_ops; 2327 int err = -EINVAL; 2328 2329 if (tb[IFLA_VF_MAC]) { 2330 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 2331 2332 if (ivm->vf >= INT_MAX) 2333 return -EINVAL; 2334 err = -EOPNOTSUPP; 2335 if (ops->ndo_set_vf_mac) 2336 err = ops->ndo_set_vf_mac(dev, ivm->vf, 2337 ivm->mac); 2338 if (err < 0) 2339 return err; 2340 } 2341 2342 if (tb[IFLA_VF_VLAN]) { 2343 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 2344 2345 if (ivv->vf >= INT_MAX) 2346 return -EINVAL; 2347 err = -EOPNOTSUPP; 2348 if (ops->ndo_set_vf_vlan) 2349 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 2350 ivv->qos, 2351 htons(ETH_P_8021Q)); 2352 if (err < 0) 2353 return err; 2354 } 2355 2356 if (tb[IFLA_VF_VLAN_LIST]) { 2357 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 2358 struct nlattr *attr; 2359 int rem, len = 0; 2360 2361 err = -EOPNOTSUPP; 2362 if (!ops->ndo_set_vf_vlan) 2363 return err; 2364 2365 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 2366 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 2367 nla_len(attr) < NLA_HDRLEN) { 2368 return -EINVAL; 2369 } 2370 if (len >= MAX_VLAN_LIST_LEN) 2371 return -EOPNOTSUPP; 2372 ivvl[len] = nla_data(attr); 2373 2374 len++; 2375 } 2376 if (len == 0) 2377 return -EINVAL; 2378 2379 if (ivvl[0]->vf >= INT_MAX) 2380 return -EINVAL; 2381 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 2382 ivvl[0]->qos, ivvl[0]->vlan_proto); 2383 if (err < 0) 2384 return err; 2385 } 2386 2387 if (tb[IFLA_VF_TX_RATE]) { 2388 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 2389 struct ifla_vf_info ivf; 2390 2391 if (ivt->vf >= INT_MAX) 2392 return -EINVAL; 2393 err = -EOPNOTSUPP; 2394 if (ops->ndo_get_vf_config) 2395 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 2396 if (err < 0) 2397 return err; 2398 2399 err = -EOPNOTSUPP; 2400 if (ops->ndo_set_vf_rate) 2401 err = ops->ndo_set_vf_rate(dev, ivt->vf, 2402 ivf.min_tx_rate, 2403 ivt->rate); 2404 if (err < 0) 2405 return err; 2406 } 2407 2408 if (tb[IFLA_VF_RATE]) { 2409 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 2410 2411 if (ivt->vf >= INT_MAX) 2412 return -EINVAL; 2413 err = -EOPNOTSUPP; 2414 if (ops->ndo_set_vf_rate) 2415 err = ops->ndo_set_vf_rate(dev, ivt->vf, 2416 ivt->min_tx_rate, 2417 ivt->max_tx_rate); 2418 if (err < 0) 2419 return err; 2420 } 2421 2422 if (tb[IFLA_VF_SPOOFCHK]) { 2423 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 2424 2425 if (ivs->vf >= INT_MAX) 2426 return -EINVAL; 2427 err = -EOPNOTSUPP; 2428 if (ops->ndo_set_vf_spoofchk) 2429 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 2430 ivs->setting); 2431 if (err < 0) 2432 return err; 2433 } 2434 2435 if (tb[IFLA_VF_LINK_STATE]) { 2436 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 2437 2438 if (ivl->vf >= INT_MAX) 2439 return -EINVAL; 2440 err = -EOPNOTSUPP; 2441 if (ops->ndo_set_vf_link_state) 2442 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 2443 ivl->link_state); 2444 if (err < 0) 2445 return err; 2446 } 2447 2448 if (tb[IFLA_VF_RSS_QUERY_EN]) { 2449 struct ifla_vf_rss_query_en *ivrssq_en; 2450 2451 err = -EOPNOTSUPP; 2452 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 2453 if (ivrssq_en->vf >= INT_MAX) 2454 return -EINVAL; 2455 if (ops->ndo_set_vf_rss_query_en) 2456 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 2457 ivrssq_en->setting); 2458 if (err < 0) 2459 return err; 2460 } 2461 2462 if (tb[IFLA_VF_TRUST]) { 2463 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 2464 2465 if (ivt->vf >= INT_MAX) 2466 return -EINVAL; 2467 err = -EOPNOTSUPP; 2468 if (ops->ndo_set_vf_trust) 2469 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 2470 if (err < 0) 2471 return err; 2472 } 2473 2474 if (tb[IFLA_VF_IB_NODE_GUID]) { 2475 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 2476 2477 if (ivt->vf >= INT_MAX) 2478 return -EINVAL; 2479 if (!ops->ndo_set_vf_guid) 2480 return -EOPNOTSUPP; 2481 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 2482 } 2483 2484 if (tb[IFLA_VF_IB_PORT_GUID]) { 2485 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 2486 2487 if (ivt->vf >= INT_MAX) 2488 return -EINVAL; 2489 if (!ops->ndo_set_vf_guid) 2490 return -EOPNOTSUPP; 2491 2492 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 2493 } 2494 2495 return err; 2496 } 2497 2498 static int do_set_master(struct net_device *dev, int ifindex, 2499 struct netlink_ext_ack *extack) 2500 { 2501 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 2502 const struct net_device_ops *ops; 2503 int err; 2504 2505 if (upper_dev) { 2506 if (upper_dev->ifindex == ifindex) 2507 return 0; 2508 ops = upper_dev->netdev_ops; 2509 if (ops->ndo_del_slave) { 2510 err = ops->ndo_del_slave(upper_dev, dev); 2511 if (err) 2512 return err; 2513 } else { 2514 return -EOPNOTSUPP; 2515 } 2516 } 2517 2518 if (ifindex) { 2519 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 2520 if (!upper_dev) 2521 return -EINVAL; 2522 ops = upper_dev->netdev_ops; 2523 if (ops->ndo_add_slave) { 2524 err = ops->ndo_add_slave(upper_dev, dev, extack); 2525 if (err) 2526 return err; 2527 } else { 2528 return -EOPNOTSUPP; 2529 } 2530 } 2531 return 0; 2532 } 2533 2534 static const struct nla_policy ifla_proto_down_reason_policy[IFLA_PROTO_DOWN_REASON_VALUE + 1] = { 2535 [IFLA_PROTO_DOWN_REASON_MASK] = { .type = NLA_U32 }, 2536 [IFLA_PROTO_DOWN_REASON_VALUE] = { .type = NLA_U32 }, 2537 }; 2538 2539 static int do_set_proto_down(struct net_device *dev, 2540 struct nlattr *nl_proto_down, 2541 struct nlattr *nl_proto_down_reason, 2542 struct netlink_ext_ack *extack) 2543 { 2544 struct nlattr *pdreason[IFLA_PROTO_DOWN_REASON_MAX + 1]; 2545 const struct net_device_ops *ops = dev->netdev_ops; 2546 unsigned long mask = 0; 2547 u32 value; 2548 bool proto_down; 2549 int err; 2550 2551 if (!ops->ndo_change_proto_down) { 2552 NL_SET_ERR_MSG(extack, "Protodown not supported by device"); 2553 return -EOPNOTSUPP; 2554 } 2555 2556 if (nl_proto_down_reason) { 2557 err = nla_parse_nested_deprecated(pdreason, 2558 IFLA_PROTO_DOWN_REASON_MAX, 2559 nl_proto_down_reason, 2560 ifla_proto_down_reason_policy, 2561 NULL); 2562 if (err < 0) 2563 return err; 2564 2565 if (!pdreason[IFLA_PROTO_DOWN_REASON_VALUE]) { 2566 NL_SET_ERR_MSG(extack, "Invalid protodown reason value"); 2567 return -EINVAL; 2568 } 2569 2570 value = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_VALUE]); 2571 2572 if (pdreason[IFLA_PROTO_DOWN_REASON_MASK]) 2573 mask = nla_get_u32(pdreason[IFLA_PROTO_DOWN_REASON_MASK]); 2574 2575 dev_change_proto_down_reason(dev, mask, value); 2576 } 2577 2578 if (nl_proto_down) { 2579 proto_down = nla_get_u8(nl_proto_down); 2580 2581 /* Don't turn off protodown if there are active reasons */ 2582 if (!proto_down && dev->proto_down_reason) { 2583 NL_SET_ERR_MSG(extack, "Cannot clear protodown, active reasons"); 2584 return -EBUSY; 2585 } 2586 err = dev_change_proto_down(dev, 2587 proto_down); 2588 if (err) 2589 return err; 2590 } 2591 2592 return 0; 2593 } 2594 2595 #define DO_SETLINK_MODIFIED 0x01 2596 /* notify flag means notify + modified. */ 2597 #define DO_SETLINK_NOTIFY 0x03 2598 static int do_setlink(const struct sk_buff *skb, 2599 struct net_device *dev, struct ifinfomsg *ifm, 2600 struct netlink_ext_ack *extack, 2601 struct nlattr **tb, char *ifname, int status) 2602 { 2603 const struct net_device_ops *ops = dev->netdev_ops; 2604 int err; 2605 2606 err = validate_linkmsg(dev, tb); 2607 if (err < 0) 2608 return err; 2609 2610 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD] || tb[IFLA_TARGET_NETNSID]) { 2611 struct net *net; 2612 int new_ifindex; 2613 2614 net = rtnl_link_get_net_capable(skb, dev_net(dev), 2615 tb, CAP_NET_ADMIN); 2616 if (IS_ERR(net)) { 2617 err = PTR_ERR(net); 2618 goto errout; 2619 } 2620 2621 if (tb[IFLA_NEW_IFINDEX]) 2622 new_ifindex = nla_get_s32(tb[IFLA_NEW_IFINDEX]); 2623 else 2624 new_ifindex = 0; 2625 2626 err = __dev_change_net_namespace(dev, net, ifname, new_ifindex); 2627 put_net(net); 2628 if (err) 2629 goto errout; 2630 status |= DO_SETLINK_MODIFIED; 2631 } 2632 2633 if (tb[IFLA_MAP]) { 2634 struct rtnl_link_ifmap *u_map; 2635 struct ifmap k_map; 2636 2637 if (!ops->ndo_set_config) { 2638 err = -EOPNOTSUPP; 2639 goto errout; 2640 } 2641 2642 if (!netif_device_present(dev)) { 2643 err = -ENODEV; 2644 goto errout; 2645 } 2646 2647 u_map = nla_data(tb[IFLA_MAP]); 2648 k_map.mem_start = (unsigned long) u_map->mem_start; 2649 k_map.mem_end = (unsigned long) u_map->mem_end; 2650 k_map.base_addr = (unsigned short) u_map->base_addr; 2651 k_map.irq = (unsigned char) u_map->irq; 2652 k_map.dma = (unsigned char) u_map->dma; 2653 k_map.port = (unsigned char) u_map->port; 2654 2655 err = ops->ndo_set_config(dev, &k_map); 2656 if (err < 0) 2657 goto errout; 2658 2659 status |= DO_SETLINK_NOTIFY; 2660 } 2661 2662 if (tb[IFLA_ADDRESS]) { 2663 struct sockaddr *sa; 2664 int len; 2665 2666 len = sizeof(sa_family_t) + max_t(size_t, dev->addr_len, 2667 sizeof(*sa)); 2668 sa = kmalloc(len, GFP_KERNEL); 2669 if (!sa) { 2670 err = -ENOMEM; 2671 goto errout; 2672 } 2673 sa->sa_family = dev->type; 2674 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 2675 dev->addr_len); 2676 err = dev_set_mac_address_user(dev, sa, extack); 2677 kfree(sa); 2678 if (err) 2679 goto errout; 2680 status |= DO_SETLINK_MODIFIED; 2681 } 2682 2683 if (tb[IFLA_MTU]) { 2684 err = dev_set_mtu_ext(dev, nla_get_u32(tb[IFLA_MTU]), extack); 2685 if (err < 0) 2686 goto errout; 2687 status |= DO_SETLINK_MODIFIED; 2688 } 2689 2690 if (tb[IFLA_GROUP]) { 2691 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2692 status |= DO_SETLINK_NOTIFY; 2693 } 2694 2695 /* 2696 * Interface selected by interface index but interface 2697 * name provided implies that a name change has been 2698 * requested. 2699 */ 2700 if (ifm->ifi_index > 0 && ifname[0]) { 2701 err = dev_change_name(dev, ifname); 2702 if (err < 0) 2703 goto errout; 2704 status |= DO_SETLINK_MODIFIED; 2705 } 2706 2707 if (tb[IFLA_IFALIAS]) { 2708 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2709 nla_len(tb[IFLA_IFALIAS])); 2710 if (err < 0) 2711 goto errout; 2712 status |= DO_SETLINK_NOTIFY; 2713 } 2714 2715 if (tb[IFLA_BROADCAST]) { 2716 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2717 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2718 } 2719 2720 if (ifm->ifi_flags || ifm->ifi_change) { 2721 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), 2722 extack); 2723 if (err < 0) 2724 goto errout; 2725 } 2726 2727 if (tb[IFLA_MASTER]) { 2728 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 2729 if (err) 2730 goto errout; 2731 status |= DO_SETLINK_MODIFIED; 2732 } 2733 2734 if (tb[IFLA_CARRIER]) { 2735 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2736 if (err) 2737 goto errout; 2738 status |= DO_SETLINK_MODIFIED; 2739 } 2740 2741 if (tb[IFLA_TXQLEN]) { 2742 unsigned int value = nla_get_u32(tb[IFLA_TXQLEN]); 2743 2744 err = dev_change_tx_queue_len(dev, value); 2745 if (err) 2746 goto errout; 2747 status |= DO_SETLINK_MODIFIED; 2748 } 2749 2750 if (tb[IFLA_GSO_MAX_SIZE]) { 2751 u32 max_size = nla_get_u32(tb[IFLA_GSO_MAX_SIZE]); 2752 2753 if (max_size > GSO_MAX_SIZE) { 2754 err = -EINVAL; 2755 goto errout; 2756 } 2757 2758 if (dev->gso_max_size ^ max_size) { 2759 netif_set_gso_max_size(dev, max_size); 2760 status |= DO_SETLINK_MODIFIED; 2761 } 2762 } 2763 2764 if (tb[IFLA_GSO_MAX_SEGS]) { 2765 u32 max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); 2766 2767 if (max_segs > GSO_MAX_SEGS) { 2768 err = -EINVAL; 2769 goto errout; 2770 } 2771 2772 if (dev->gso_max_segs ^ max_segs) { 2773 dev->gso_max_segs = max_segs; 2774 status |= DO_SETLINK_MODIFIED; 2775 } 2776 } 2777 2778 if (tb[IFLA_OPERSTATE]) 2779 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2780 2781 if (tb[IFLA_LINKMODE]) { 2782 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2783 2784 write_lock_bh(&dev_base_lock); 2785 if (dev->link_mode ^ value) 2786 status |= DO_SETLINK_NOTIFY; 2787 dev->link_mode = value; 2788 write_unlock_bh(&dev_base_lock); 2789 } 2790 2791 if (tb[IFLA_VFINFO_LIST]) { 2792 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2793 struct nlattr *attr; 2794 int rem; 2795 2796 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2797 if (nla_type(attr) != IFLA_VF_INFO || 2798 nla_len(attr) < NLA_HDRLEN) { 2799 err = -EINVAL; 2800 goto errout; 2801 } 2802 err = nla_parse_nested_deprecated(vfinfo, IFLA_VF_MAX, 2803 attr, 2804 ifla_vf_policy, 2805 NULL); 2806 if (err < 0) 2807 goto errout; 2808 err = do_setvfinfo(dev, vfinfo); 2809 if (err < 0) 2810 goto errout; 2811 status |= DO_SETLINK_NOTIFY; 2812 } 2813 } 2814 err = 0; 2815 2816 if (tb[IFLA_VF_PORTS]) { 2817 struct nlattr *port[IFLA_PORT_MAX+1]; 2818 struct nlattr *attr; 2819 int vf; 2820 int rem; 2821 2822 err = -EOPNOTSUPP; 2823 if (!ops->ndo_set_vf_port) 2824 goto errout; 2825 2826 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2827 if (nla_type(attr) != IFLA_VF_PORT || 2828 nla_len(attr) < NLA_HDRLEN) { 2829 err = -EINVAL; 2830 goto errout; 2831 } 2832 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, 2833 attr, 2834 ifla_port_policy, 2835 NULL); 2836 if (err < 0) 2837 goto errout; 2838 if (!port[IFLA_PORT_VF]) { 2839 err = -EOPNOTSUPP; 2840 goto errout; 2841 } 2842 vf = nla_get_u32(port[IFLA_PORT_VF]); 2843 err = ops->ndo_set_vf_port(dev, vf, port); 2844 if (err < 0) 2845 goto errout; 2846 status |= DO_SETLINK_NOTIFY; 2847 } 2848 } 2849 err = 0; 2850 2851 if (tb[IFLA_PORT_SELF]) { 2852 struct nlattr *port[IFLA_PORT_MAX+1]; 2853 2854 err = nla_parse_nested_deprecated(port, IFLA_PORT_MAX, 2855 tb[IFLA_PORT_SELF], 2856 ifla_port_policy, NULL); 2857 if (err < 0) 2858 goto errout; 2859 2860 err = -EOPNOTSUPP; 2861 if (ops->ndo_set_vf_port) 2862 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2863 if (err < 0) 2864 goto errout; 2865 status |= DO_SETLINK_NOTIFY; 2866 } 2867 2868 if (tb[IFLA_AF_SPEC]) { 2869 struct nlattr *af; 2870 int rem; 2871 2872 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2873 const struct rtnl_af_ops *af_ops; 2874 2875 BUG_ON(!(af_ops = rtnl_af_lookup(nla_type(af)))); 2876 2877 err = af_ops->set_link_af(dev, af, extack); 2878 if (err < 0) 2879 goto errout; 2880 2881 status |= DO_SETLINK_NOTIFY; 2882 } 2883 } 2884 err = 0; 2885 2886 if (tb[IFLA_PROTO_DOWN] || tb[IFLA_PROTO_DOWN_REASON]) { 2887 err = do_set_proto_down(dev, tb[IFLA_PROTO_DOWN], 2888 tb[IFLA_PROTO_DOWN_REASON], extack); 2889 if (err) 2890 goto errout; 2891 status |= DO_SETLINK_NOTIFY; 2892 } 2893 2894 if (tb[IFLA_XDP]) { 2895 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2896 u32 xdp_flags = 0; 2897 2898 err = nla_parse_nested_deprecated(xdp, IFLA_XDP_MAX, 2899 tb[IFLA_XDP], 2900 ifla_xdp_policy, NULL); 2901 if (err < 0) 2902 goto errout; 2903 2904 if (xdp[IFLA_XDP_ATTACHED] || xdp[IFLA_XDP_PROG_ID]) { 2905 err = -EINVAL; 2906 goto errout; 2907 } 2908 2909 if (xdp[IFLA_XDP_FLAGS]) { 2910 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2911 if (xdp_flags & ~XDP_FLAGS_MASK) { 2912 err = -EINVAL; 2913 goto errout; 2914 } 2915 if (hweight32(xdp_flags & XDP_FLAGS_MODES) > 1) { 2916 err = -EINVAL; 2917 goto errout; 2918 } 2919 } 2920 2921 if (xdp[IFLA_XDP_FD]) { 2922 int expected_fd = -1; 2923 2924 if (xdp_flags & XDP_FLAGS_REPLACE) { 2925 if (!xdp[IFLA_XDP_EXPECTED_FD]) { 2926 err = -EINVAL; 2927 goto errout; 2928 } 2929 expected_fd = 2930 nla_get_s32(xdp[IFLA_XDP_EXPECTED_FD]); 2931 } 2932 2933 err = dev_change_xdp_fd(dev, extack, 2934 nla_get_s32(xdp[IFLA_XDP_FD]), 2935 expected_fd, 2936 xdp_flags); 2937 if (err) 2938 goto errout; 2939 status |= DO_SETLINK_NOTIFY; 2940 } 2941 } 2942 2943 errout: 2944 if (status & DO_SETLINK_MODIFIED) { 2945 if ((status & DO_SETLINK_NOTIFY) == DO_SETLINK_NOTIFY) 2946 netdev_state_change(dev); 2947 2948 if (err < 0) 2949 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", 2950 dev->name); 2951 } 2952 2953 return err; 2954 } 2955 2956 static struct net_device *rtnl_dev_get(struct net *net, 2957 struct nlattr *ifname_attr, 2958 struct nlattr *altifname_attr, 2959 char *ifname) 2960 { 2961 char buffer[ALTIFNAMSIZ]; 2962 2963 if (!ifname) { 2964 ifname = buffer; 2965 if (ifname_attr) 2966 nla_strscpy(ifname, ifname_attr, IFNAMSIZ); 2967 else if (altifname_attr) 2968 nla_strscpy(ifname, altifname_attr, ALTIFNAMSIZ); 2969 else 2970 return NULL; 2971 } 2972 2973 return __dev_get_by_name(net, ifname); 2974 } 2975 2976 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2977 struct netlink_ext_ack *extack) 2978 { 2979 struct net *net = sock_net(skb->sk); 2980 struct ifinfomsg *ifm; 2981 struct net_device *dev; 2982 int err; 2983 struct nlattr *tb[IFLA_MAX+1]; 2984 char ifname[IFNAMSIZ]; 2985 2986 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 2987 ifla_policy, extack); 2988 if (err < 0) 2989 goto errout; 2990 2991 err = rtnl_ensure_unique_netns(tb, extack, false); 2992 if (err < 0) 2993 goto errout; 2994 2995 if (tb[IFLA_IFNAME]) 2996 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2997 else 2998 ifname[0] = '\0'; 2999 3000 err = -EINVAL; 3001 ifm = nlmsg_data(nlh); 3002 if (ifm->ifi_index > 0) 3003 dev = __dev_get_by_index(net, ifm->ifi_index); 3004 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3005 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); 3006 else 3007 goto errout; 3008 3009 if (dev == NULL) { 3010 err = -ENODEV; 3011 goto errout; 3012 } 3013 3014 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0); 3015 errout: 3016 return err; 3017 } 3018 3019 static int rtnl_group_dellink(const struct net *net, int group) 3020 { 3021 struct net_device *dev, *aux; 3022 LIST_HEAD(list_kill); 3023 bool found = false; 3024 3025 if (!group) 3026 return -EPERM; 3027 3028 for_each_netdev(net, dev) { 3029 if (dev->group == group) { 3030 const struct rtnl_link_ops *ops; 3031 3032 found = true; 3033 ops = dev->rtnl_link_ops; 3034 if (!ops || !ops->dellink) 3035 return -EOPNOTSUPP; 3036 } 3037 } 3038 3039 if (!found) 3040 return -ENODEV; 3041 3042 for_each_netdev_safe(net, dev, aux) { 3043 if (dev->group == group) { 3044 const struct rtnl_link_ops *ops; 3045 3046 ops = dev->rtnl_link_ops; 3047 ops->dellink(dev, &list_kill); 3048 } 3049 } 3050 unregister_netdevice_many(&list_kill); 3051 3052 return 0; 3053 } 3054 3055 int rtnl_delete_link(struct net_device *dev) 3056 { 3057 const struct rtnl_link_ops *ops; 3058 LIST_HEAD(list_kill); 3059 3060 ops = dev->rtnl_link_ops; 3061 if (!ops || !ops->dellink) 3062 return -EOPNOTSUPP; 3063 3064 ops->dellink(dev, &list_kill); 3065 unregister_netdevice_many(&list_kill); 3066 3067 return 0; 3068 } 3069 EXPORT_SYMBOL_GPL(rtnl_delete_link); 3070 3071 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 3072 struct netlink_ext_ack *extack) 3073 { 3074 struct net *net = sock_net(skb->sk); 3075 struct net *tgt_net = net; 3076 struct net_device *dev = NULL; 3077 struct ifinfomsg *ifm; 3078 struct nlattr *tb[IFLA_MAX+1]; 3079 int err; 3080 int netnsid = -1; 3081 3082 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3083 ifla_policy, extack); 3084 if (err < 0) 3085 return err; 3086 3087 err = rtnl_ensure_unique_netns(tb, extack, true); 3088 if (err < 0) 3089 return err; 3090 3091 if (tb[IFLA_TARGET_NETNSID]) { 3092 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); 3093 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); 3094 if (IS_ERR(tgt_net)) 3095 return PTR_ERR(tgt_net); 3096 } 3097 3098 err = -EINVAL; 3099 ifm = nlmsg_data(nlh); 3100 if (ifm->ifi_index > 0) 3101 dev = __dev_get_by_index(tgt_net, ifm->ifi_index); 3102 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3103 dev = rtnl_dev_get(net, tb[IFLA_IFNAME], 3104 tb[IFLA_ALT_IFNAME], NULL); 3105 else if (tb[IFLA_GROUP]) 3106 err = rtnl_group_dellink(tgt_net, nla_get_u32(tb[IFLA_GROUP])); 3107 else 3108 goto out; 3109 3110 if (!dev) { 3111 if (tb[IFLA_IFNAME] || ifm->ifi_index > 0) 3112 err = -ENODEV; 3113 3114 goto out; 3115 } 3116 3117 err = rtnl_delete_link(dev); 3118 3119 out: 3120 if (netnsid >= 0) 3121 put_net(tgt_net); 3122 3123 return err; 3124 } 3125 3126 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 3127 { 3128 unsigned int old_flags; 3129 int err; 3130 3131 old_flags = dev->flags; 3132 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 3133 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm), 3134 NULL); 3135 if (err < 0) 3136 return err; 3137 } 3138 3139 if (dev->rtnl_link_state == RTNL_LINK_INITIALIZED) { 3140 __dev_notify_flags(dev, old_flags, (old_flags ^ dev->flags)); 3141 } else { 3142 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 3143 __dev_notify_flags(dev, old_flags, ~0U); 3144 } 3145 return 0; 3146 } 3147 EXPORT_SYMBOL(rtnl_configure_link); 3148 3149 struct net_device *rtnl_create_link(struct net *net, const char *ifname, 3150 unsigned char name_assign_type, 3151 const struct rtnl_link_ops *ops, 3152 struct nlattr *tb[], 3153 struct netlink_ext_ack *extack) 3154 { 3155 struct net_device *dev; 3156 unsigned int num_tx_queues = 1; 3157 unsigned int num_rx_queues = 1; 3158 3159 if (tb[IFLA_NUM_TX_QUEUES]) 3160 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 3161 else if (ops->get_num_tx_queues) 3162 num_tx_queues = ops->get_num_tx_queues(); 3163 3164 if (tb[IFLA_NUM_RX_QUEUES]) 3165 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 3166 else if (ops->get_num_rx_queues) 3167 num_rx_queues = ops->get_num_rx_queues(); 3168 3169 if (num_tx_queues < 1 || num_tx_queues > 4096) { 3170 NL_SET_ERR_MSG(extack, "Invalid number of transmit queues"); 3171 return ERR_PTR(-EINVAL); 3172 } 3173 3174 if (num_rx_queues < 1 || num_rx_queues > 4096) { 3175 NL_SET_ERR_MSG(extack, "Invalid number of receive queues"); 3176 return ERR_PTR(-EINVAL); 3177 } 3178 3179 if (ops->alloc) { 3180 dev = ops->alloc(tb, ifname, name_assign_type, 3181 num_tx_queues, num_rx_queues); 3182 if (IS_ERR(dev)) 3183 return dev; 3184 } else { 3185 dev = alloc_netdev_mqs(ops->priv_size, ifname, 3186 name_assign_type, ops->setup, 3187 num_tx_queues, num_rx_queues); 3188 } 3189 3190 if (!dev) 3191 return ERR_PTR(-ENOMEM); 3192 3193 dev_net_set(dev, net); 3194 dev->rtnl_link_ops = ops; 3195 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 3196 3197 if (tb[IFLA_MTU]) { 3198 u32 mtu = nla_get_u32(tb[IFLA_MTU]); 3199 int err; 3200 3201 err = dev_validate_mtu(dev, mtu, extack); 3202 if (err) { 3203 free_netdev(dev); 3204 return ERR_PTR(err); 3205 } 3206 dev->mtu = mtu; 3207 } 3208 if (tb[IFLA_ADDRESS]) { 3209 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 3210 nla_len(tb[IFLA_ADDRESS])); 3211 dev->addr_assign_type = NET_ADDR_SET; 3212 } 3213 if (tb[IFLA_BROADCAST]) 3214 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 3215 nla_len(tb[IFLA_BROADCAST])); 3216 if (tb[IFLA_TXQLEN]) 3217 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 3218 if (tb[IFLA_OPERSTATE]) 3219 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 3220 if (tb[IFLA_LINKMODE]) 3221 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 3222 if (tb[IFLA_GROUP]) 3223 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 3224 if (tb[IFLA_GSO_MAX_SIZE]) 3225 netif_set_gso_max_size(dev, nla_get_u32(tb[IFLA_GSO_MAX_SIZE])); 3226 if (tb[IFLA_GSO_MAX_SEGS]) 3227 dev->gso_max_segs = nla_get_u32(tb[IFLA_GSO_MAX_SEGS]); 3228 3229 return dev; 3230 } 3231 EXPORT_SYMBOL(rtnl_create_link); 3232 3233 static int rtnl_group_changelink(const struct sk_buff *skb, 3234 struct net *net, int group, 3235 struct ifinfomsg *ifm, 3236 struct netlink_ext_ack *extack, 3237 struct nlattr **tb) 3238 { 3239 struct net_device *dev, *aux; 3240 int err; 3241 3242 for_each_netdev_safe(net, dev, aux) { 3243 if (dev->group == group) { 3244 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0); 3245 if (err < 0) 3246 return err; 3247 } 3248 } 3249 3250 return 0; 3251 } 3252 3253 static int __rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3254 struct nlattr **attr, struct netlink_ext_ack *extack) 3255 { 3256 struct nlattr *slave_attr[RTNL_SLAVE_MAX_TYPE + 1]; 3257 unsigned char name_assign_type = NET_NAME_USER; 3258 struct nlattr *linkinfo[IFLA_INFO_MAX + 1]; 3259 const struct rtnl_link_ops *m_ops = NULL; 3260 struct net_device *master_dev = NULL; 3261 struct net *net = sock_net(skb->sk); 3262 const struct rtnl_link_ops *ops; 3263 struct nlattr *tb[IFLA_MAX + 1]; 3264 struct net *dest_net, *link_net; 3265 struct nlattr **slave_data; 3266 char kind[MODULE_NAME_LEN]; 3267 struct net_device *dev; 3268 struct ifinfomsg *ifm; 3269 char ifname[IFNAMSIZ]; 3270 struct nlattr **data; 3271 int err; 3272 3273 #ifdef CONFIG_MODULES 3274 replay: 3275 #endif 3276 err = nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3277 ifla_policy, extack); 3278 if (err < 0) 3279 return err; 3280 3281 err = rtnl_ensure_unique_netns(tb, extack, false); 3282 if (err < 0) 3283 return err; 3284 3285 if (tb[IFLA_IFNAME]) 3286 nla_strscpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 3287 else 3288 ifname[0] = '\0'; 3289 3290 ifm = nlmsg_data(nlh); 3291 if (ifm->ifi_index > 0) 3292 dev = __dev_get_by_index(net, ifm->ifi_index); 3293 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3294 dev = rtnl_dev_get(net, NULL, tb[IFLA_ALT_IFNAME], ifname); 3295 else 3296 dev = NULL; 3297 3298 if (dev) { 3299 master_dev = netdev_master_upper_dev_get(dev); 3300 if (master_dev) 3301 m_ops = master_dev->rtnl_link_ops; 3302 } 3303 3304 err = validate_linkmsg(dev, tb); 3305 if (err < 0) 3306 return err; 3307 3308 if (tb[IFLA_LINKINFO]) { 3309 err = nla_parse_nested_deprecated(linkinfo, IFLA_INFO_MAX, 3310 tb[IFLA_LINKINFO], 3311 ifla_info_policy, NULL); 3312 if (err < 0) 3313 return err; 3314 } else 3315 memset(linkinfo, 0, sizeof(linkinfo)); 3316 3317 if (linkinfo[IFLA_INFO_KIND]) { 3318 nla_strscpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 3319 ops = rtnl_link_ops_get(kind); 3320 } else { 3321 kind[0] = '\0'; 3322 ops = NULL; 3323 } 3324 3325 data = NULL; 3326 if (ops) { 3327 if (ops->maxtype > RTNL_MAX_TYPE) 3328 return -EINVAL; 3329 3330 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 3331 err = nla_parse_nested_deprecated(attr, ops->maxtype, 3332 linkinfo[IFLA_INFO_DATA], 3333 ops->policy, extack); 3334 if (err < 0) 3335 return err; 3336 data = attr; 3337 } 3338 if (ops->validate) { 3339 err = ops->validate(tb, data, extack); 3340 if (err < 0) 3341 return err; 3342 } 3343 } 3344 3345 slave_data = NULL; 3346 if (m_ops) { 3347 if (m_ops->slave_maxtype > RTNL_SLAVE_MAX_TYPE) 3348 return -EINVAL; 3349 3350 if (m_ops->slave_maxtype && 3351 linkinfo[IFLA_INFO_SLAVE_DATA]) { 3352 err = nla_parse_nested_deprecated(slave_attr, 3353 m_ops->slave_maxtype, 3354 linkinfo[IFLA_INFO_SLAVE_DATA], 3355 m_ops->slave_policy, 3356 extack); 3357 if (err < 0) 3358 return err; 3359 slave_data = slave_attr; 3360 } 3361 } 3362 3363 if (dev) { 3364 int status = 0; 3365 3366 if (nlh->nlmsg_flags & NLM_F_EXCL) 3367 return -EEXIST; 3368 if (nlh->nlmsg_flags & NLM_F_REPLACE) 3369 return -EOPNOTSUPP; 3370 3371 if (linkinfo[IFLA_INFO_DATA]) { 3372 if (!ops || ops != dev->rtnl_link_ops || 3373 !ops->changelink) 3374 return -EOPNOTSUPP; 3375 3376 err = ops->changelink(dev, tb, data, extack); 3377 if (err < 0) 3378 return err; 3379 status |= DO_SETLINK_NOTIFY; 3380 } 3381 3382 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 3383 if (!m_ops || !m_ops->slave_changelink) 3384 return -EOPNOTSUPP; 3385 3386 err = m_ops->slave_changelink(master_dev, dev, tb, 3387 slave_data, extack); 3388 if (err < 0) 3389 return err; 3390 status |= DO_SETLINK_NOTIFY; 3391 } 3392 3393 return do_setlink(skb, dev, ifm, extack, tb, ifname, status); 3394 } 3395 3396 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 3397 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 3398 return rtnl_group_changelink(skb, net, 3399 nla_get_u32(tb[IFLA_GROUP]), 3400 ifm, extack, tb); 3401 return -ENODEV; 3402 } 3403 3404 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 3405 return -EOPNOTSUPP; 3406 3407 if (!ops) { 3408 #ifdef CONFIG_MODULES 3409 if (kind[0]) { 3410 __rtnl_unlock(); 3411 request_module("rtnl-link-%s", kind); 3412 rtnl_lock(); 3413 ops = rtnl_link_ops_get(kind); 3414 if (ops) 3415 goto replay; 3416 } 3417 #endif 3418 NL_SET_ERR_MSG(extack, "Unknown device type"); 3419 return -EOPNOTSUPP; 3420 } 3421 3422 if (!ops->alloc && !ops->setup) 3423 return -EOPNOTSUPP; 3424 3425 if (!ifname[0]) { 3426 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 3427 name_assign_type = NET_NAME_ENUM; 3428 } 3429 3430 dest_net = rtnl_link_get_net_capable(skb, net, tb, CAP_NET_ADMIN); 3431 if (IS_ERR(dest_net)) 3432 return PTR_ERR(dest_net); 3433 3434 if (tb[IFLA_LINK_NETNSID]) { 3435 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 3436 3437 link_net = get_net_ns_by_id(dest_net, id); 3438 if (!link_net) { 3439 NL_SET_ERR_MSG(extack, "Unknown network namespace id"); 3440 err = -EINVAL; 3441 goto out; 3442 } 3443 err = -EPERM; 3444 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 3445 goto out; 3446 } else { 3447 link_net = NULL; 3448 } 3449 3450 dev = rtnl_create_link(link_net ? : dest_net, ifname, 3451 name_assign_type, ops, tb, extack); 3452 if (IS_ERR(dev)) { 3453 err = PTR_ERR(dev); 3454 goto out; 3455 } 3456 3457 dev->ifindex = ifm->ifi_index; 3458 3459 if (ops->newlink) 3460 err = ops->newlink(link_net ? : net, dev, tb, data, extack); 3461 else 3462 err = register_netdevice(dev); 3463 if (err < 0) { 3464 free_netdev(dev); 3465 goto out; 3466 } 3467 3468 err = rtnl_configure_link(dev, ifm); 3469 if (err < 0) 3470 goto out_unregister; 3471 if (link_net) { 3472 err = dev_change_net_namespace(dev, dest_net, ifname); 3473 if (err < 0) 3474 goto out_unregister; 3475 } 3476 if (tb[IFLA_MASTER]) { 3477 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER]), extack); 3478 if (err) 3479 goto out_unregister; 3480 } 3481 out: 3482 if (link_net) 3483 put_net(link_net); 3484 put_net(dest_net); 3485 return err; 3486 out_unregister: 3487 if (ops->newlink) { 3488 LIST_HEAD(list_kill); 3489 3490 ops->dellink(dev, &list_kill); 3491 unregister_netdevice_many(&list_kill); 3492 } else { 3493 unregister_netdevice(dev); 3494 } 3495 goto out; 3496 } 3497 3498 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3499 struct netlink_ext_ack *extack) 3500 { 3501 struct nlattr **attr; 3502 int ret; 3503 3504 attr = kmalloc_array(RTNL_MAX_TYPE + 1, sizeof(*attr), GFP_KERNEL); 3505 if (!attr) 3506 return -ENOMEM; 3507 3508 ret = __rtnl_newlink(skb, nlh, attr, extack); 3509 kfree(attr); 3510 return ret; 3511 } 3512 3513 static int rtnl_valid_getlink_req(struct sk_buff *skb, 3514 const struct nlmsghdr *nlh, 3515 struct nlattr **tb, 3516 struct netlink_ext_ack *extack) 3517 { 3518 struct ifinfomsg *ifm; 3519 int i, err; 3520 3521 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 3522 NL_SET_ERR_MSG(extack, "Invalid header for get link"); 3523 return -EINVAL; 3524 } 3525 3526 if (!netlink_strict_get_check(skb)) 3527 return nlmsg_parse_deprecated(nlh, sizeof(*ifm), tb, IFLA_MAX, 3528 ifla_policy, extack); 3529 3530 ifm = nlmsg_data(nlh); 3531 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 3532 ifm->ifi_change) { 3533 NL_SET_ERR_MSG(extack, "Invalid values in header for get link request"); 3534 return -EINVAL; 3535 } 3536 3537 err = nlmsg_parse_deprecated_strict(nlh, sizeof(*ifm), tb, IFLA_MAX, 3538 ifla_policy, extack); 3539 if (err) 3540 return err; 3541 3542 for (i = 0; i <= IFLA_MAX; i++) { 3543 if (!tb[i]) 3544 continue; 3545 3546 switch (i) { 3547 case IFLA_IFNAME: 3548 case IFLA_ALT_IFNAME: 3549 case IFLA_EXT_MASK: 3550 case IFLA_TARGET_NETNSID: 3551 break; 3552 default: 3553 NL_SET_ERR_MSG(extack, "Unsupported attribute in get link request"); 3554 return -EINVAL; 3555 } 3556 } 3557 3558 return 0; 3559 } 3560 3561 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3562 struct netlink_ext_ack *extack) 3563 { 3564 struct net *net = sock_net(skb->sk); 3565 struct net *tgt_net = net; 3566 struct ifinfomsg *ifm; 3567 struct nlattr *tb[IFLA_MAX+1]; 3568 struct net_device *dev = NULL; 3569 struct sk_buff *nskb; 3570 int netnsid = -1; 3571 int err; 3572 u32 ext_filter_mask = 0; 3573 3574 err = rtnl_valid_getlink_req(skb, nlh, tb, extack); 3575 if (err < 0) 3576 return err; 3577 3578 err = rtnl_ensure_unique_netns(tb, extack, true); 3579 if (err < 0) 3580 return err; 3581 3582 if (tb[IFLA_TARGET_NETNSID]) { 3583 netnsid = nla_get_s32(tb[IFLA_TARGET_NETNSID]); 3584 tgt_net = rtnl_get_net_ns_capable(NETLINK_CB(skb).sk, netnsid); 3585 if (IS_ERR(tgt_net)) 3586 return PTR_ERR(tgt_net); 3587 } 3588 3589 if (tb[IFLA_EXT_MASK]) 3590 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 3591 3592 err = -EINVAL; 3593 ifm = nlmsg_data(nlh); 3594 if (ifm->ifi_index > 0) 3595 dev = __dev_get_by_index(tgt_net, ifm->ifi_index); 3596 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3597 dev = rtnl_dev_get(tgt_net, tb[IFLA_IFNAME], 3598 tb[IFLA_ALT_IFNAME], NULL); 3599 else 3600 goto out; 3601 3602 err = -ENODEV; 3603 if (dev == NULL) 3604 goto out; 3605 3606 err = -ENOBUFS; 3607 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 3608 if (nskb == NULL) 3609 goto out; 3610 3611 err = rtnl_fill_ifinfo(nskb, dev, net, 3612 RTM_NEWLINK, NETLINK_CB(skb).portid, 3613 nlh->nlmsg_seq, 0, 0, ext_filter_mask, 3614 0, NULL, 0, netnsid, GFP_KERNEL); 3615 if (err < 0) { 3616 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 3617 WARN_ON(err == -EMSGSIZE); 3618 kfree_skb(nskb); 3619 } else 3620 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3621 out: 3622 if (netnsid >= 0) 3623 put_net(tgt_net); 3624 3625 return err; 3626 } 3627 3628 static int rtnl_alt_ifname(int cmd, struct net_device *dev, struct nlattr *attr, 3629 bool *changed, struct netlink_ext_ack *extack) 3630 { 3631 char *alt_ifname; 3632 int err; 3633 3634 err = nla_validate(attr, attr->nla_len, IFLA_MAX, ifla_policy, extack); 3635 if (err) 3636 return err; 3637 3638 alt_ifname = nla_strdup(attr, GFP_KERNEL); 3639 if (!alt_ifname) 3640 return -ENOMEM; 3641 3642 if (cmd == RTM_NEWLINKPROP) { 3643 err = netdev_name_node_alt_create(dev, alt_ifname); 3644 if (!err) 3645 alt_ifname = NULL; 3646 } else if (cmd == RTM_DELLINKPROP) { 3647 err = netdev_name_node_alt_destroy(dev, alt_ifname); 3648 } else { 3649 WARN_ON_ONCE(1); 3650 err = -EINVAL; 3651 } 3652 3653 kfree(alt_ifname); 3654 if (!err) 3655 *changed = true; 3656 return err; 3657 } 3658 3659 static int rtnl_linkprop(int cmd, struct sk_buff *skb, struct nlmsghdr *nlh, 3660 struct netlink_ext_ack *extack) 3661 { 3662 struct net *net = sock_net(skb->sk); 3663 struct nlattr *tb[IFLA_MAX + 1]; 3664 struct net_device *dev; 3665 struct ifinfomsg *ifm; 3666 bool changed = false; 3667 struct nlattr *attr; 3668 int err, rem; 3669 3670 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 3671 if (err) 3672 return err; 3673 3674 err = rtnl_ensure_unique_netns(tb, extack, true); 3675 if (err) 3676 return err; 3677 3678 ifm = nlmsg_data(nlh); 3679 if (ifm->ifi_index > 0) 3680 dev = __dev_get_by_index(net, ifm->ifi_index); 3681 else if (tb[IFLA_IFNAME] || tb[IFLA_ALT_IFNAME]) 3682 dev = rtnl_dev_get(net, tb[IFLA_IFNAME], 3683 tb[IFLA_ALT_IFNAME], NULL); 3684 else 3685 return -EINVAL; 3686 3687 if (!dev) 3688 return -ENODEV; 3689 3690 if (!tb[IFLA_PROP_LIST]) 3691 return 0; 3692 3693 nla_for_each_nested(attr, tb[IFLA_PROP_LIST], rem) { 3694 switch (nla_type(attr)) { 3695 case IFLA_ALT_IFNAME: 3696 err = rtnl_alt_ifname(cmd, dev, attr, &changed, extack); 3697 if (err) 3698 return err; 3699 break; 3700 } 3701 } 3702 3703 if (changed) 3704 netdev_state_change(dev); 3705 return 0; 3706 } 3707 3708 static int rtnl_newlinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, 3709 struct netlink_ext_ack *extack) 3710 { 3711 return rtnl_linkprop(RTM_NEWLINKPROP, skb, nlh, extack); 3712 } 3713 3714 static int rtnl_dellinkprop(struct sk_buff *skb, struct nlmsghdr *nlh, 3715 struct netlink_ext_ack *extack) 3716 { 3717 return rtnl_linkprop(RTM_DELLINKPROP, skb, nlh, extack); 3718 } 3719 3720 static u32 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 3721 { 3722 struct net *net = sock_net(skb->sk); 3723 size_t min_ifinfo_dump_size = 0; 3724 struct nlattr *tb[IFLA_MAX+1]; 3725 u32 ext_filter_mask = 0; 3726 struct net_device *dev; 3727 int hdrlen; 3728 3729 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 3730 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 3731 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 3732 3733 if (nlmsg_parse_deprecated(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { 3734 if (tb[IFLA_EXT_MASK]) 3735 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 3736 } 3737 3738 if (!ext_filter_mask) 3739 return NLMSG_GOODSIZE; 3740 /* 3741 * traverse the list of net devices and compute the minimum 3742 * buffer size based upon the filter mask. 3743 */ 3744 rcu_read_lock(); 3745 for_each_netdev_rcu(net, dev) { 3746 min_ifinfo_dump_size = max(min_ifinfo_dump_size, 3747 if_nlmsg_size(dev, ext_filter_mask)); 3748 } 3749 rcu_read_unlock(); 3750 3751 return nlmsg_total_size(min_ifinfo_dump_size); 3752 } 3753 3754 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 3755 { 3756 int idx; 3757 int s_idx = cb->family; 3758 int type = cb->nlh->nlmsg_type - RTM_BASE; 3759 int ret = 0; 3760 3761 if (s_idx == 0) 3762 s_idx = 1; 3763 3764 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 3765 struct rtnl_link __rcu **tab; 3766 struct rtnl_link *link; 3767 rtnl_dumpit_func dumpit; 3768 3769 if (idx < s_idx || idx == PF_PACKET) 3770 continue; 3771 3772 if (type < 0 || type >= RTM_NR_MSGTYPES) 3773 continue; 3774 3775 tab = rcu_dereference_rtnl(rtnl_msg_handlers[idx]); 3776 if (!tab) 3777 continue; 3778 3779 link = rcu_dereference_rtnl(tab[type]); 3780 if (!link) 3781 continue; 3782 3783 dumpit = link->dumpit; 3784 if (!dumpit) 3785 continue; 3786 3787 if (idx > s_idx) { 3788 memset(&cb->args[0], 0, sizeof(cb->args)); 3789 cb->prev_seq = 0; 3790 cb->seq = 0; 3791 } 3792 ret = dumpit(skb, cb); 3793 if (ret) 3794 break; 3795 } 3796 cb->family = idx; 3797 3798 return skb->len ? : ret; 3799 } 3800 3801 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 3802 unsigned int change, 3803 u32 event, gfp_t flags, int *new_nsid, 3804 int new_ifindex) 3805 { 3806 struct net *net = dev_net(dev); 3807 struct sk_buff *skb; 3808 int err = -ENOBUFS; 3809 size_t if_info_size; 3810 3811 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 3812 if (skb == NULL) 3813 goto errout; 3814 3815 err = rtnl_fill_ifinfo(skb, dev, dev_net(dev), 3816 type, 0, 0, change, 0, 0, event, 3817 new_nsid, new_ifindex, -1, flags); 3818 if (err < 0) { 3819 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 3820 WARN_ON(err == -EMSGSIZE); 3821 kfree_skb(skb); 3822 goto errout; 3823 } 3824 return skb; 3825 errout: 3826 if (err < 0) 3827 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3828 return NULL; 3829 } 3830 3831 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 3832 { 3833 struct net *net = dev_net(dev); 3834 3835 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 3836 } 3837 3838 static void rtmsg_ifinfo_event(int type, struct net_device *dev, 3839 unsigned int change, u32 event, 3840 gfp_t flags, int *new_nsid, int new_ifindex) 3841 { 3842 struct sk_buff *skb; 3843 3844 if (dev->reg_state != NETREG_REGISTERED) 3845 return; 3846 3847 skb = rtmsg_ifinfo_build_skb(type, dev, change, event, flags, new_nsid, 3848 new_ifindex); 3849 if (skb) 3850 rtmsg_ifinfo_send(skb, dev, flags); 3851 } 3852 3853 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 3854 gfp_t flags) 3855 { 3856 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 3857 NULL, 0); 3858 } 3859 3860 void rtmsg_ifinfo_newnet(int type, struct net_device *dev, unsigned int change, 3861 gfp_t flags, int *new_nsid, int new_ifindex) 3862 { 3863 rtmsg_ifinfo_event(type, dev, change, rtnl_get_event(0), flags, 3864 new_nsid, new_ifindex); 3865 } 3866 3867 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 3868 struct net_device *dev, 3869 u8 *addr, u16 vid, u32 pid, u32 seq, 3870 int type, unsigned int flags, 3871 int nlflags, u16 ndm_state) 3872 { 3873 struct nlmsghdr *nlh; 3874 struct ndmsg *ndm; 3875 3876 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 3877 if (!nlh) 3878 return -EMSGSIZE; 3879 3880 ndm = nlmsg_data(nlh); 3881 ndm->ndm_family = AF_BRIDGE; 3882 ndm->ndm_pad1 = 0; 3883 ndm->ndm_pad2 = 0; 3884 ndm->ndm_flags = flags; 3885 ndm->ndm_type = 0; 3886 ndm->ndm_ifindex = dev->ifindex; 3887 ndm->ndm_state = ndm_state; 3888 3889 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 3890 goto nla_put_failure; 3891 if (vid) 3892 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 3893 goto nla_put_failure; 3894 3895 nlmsg_end(skb, nlh); 3896 return 0; 3897 3898 nla_put_failure: 3899 nlmsg_cancel(skb, nlh); 3900 return -EMSGSIZE; 3901 } 3902 3903 static inline size_t rtnl_fdb_nlmsg_size(void) 3904 { 3905 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 3906 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 3907 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 3908 0; 3909 } 3910 3911 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 3912 u16 ndm_state) 3913 { 3914 struct net *net = dev_net(dev); 3915 struct sk_buff *skb; 3916 int err = -ENOBUFS; 3917 3918 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 3919 if (!skb) 3920 goto errout; 3921 3922 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 3923 0, 0, type, NTF_SELF, 0, ndm_state); 3924 if (err < 0) { 3925 kfree_skb(skb); 3926 goto errout; 3927 } 3928 3929 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 3930 return; 3931 errout: 3932 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 3933 } 3934 3935 /* 3936 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 3937 */ 3938 int ndo_dflt_fdb_add(struct ndmsg *ndm, 3939 struct nlattr *tb[], 3940 struct net_device *dev, 3941 const unsigned char *addr, u16 vid, 3942 u16 flags) 3943 { 3944 int err = -EINVAL; 3945 3946 /* If aging addresses are supported device will need to 3947 * implement its own handler for this. 3948 */ 3949 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 3950 netdev_info(dev, "default FDB implementation only supports local addresses\n"); 3951 return err; 3952 } 3953 3954 if (vid) { 3955 netdev_info(dev, "vlans aren't supported yet for dev_uc|mc_add()\n"); 3956 return err; 3957 } 3958 3959 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3960 err = dev_uc_add_excl(dev, addr); 3961 else if (is_multicast_ether_addr(addr)) 3962 err = dev_mc_add_excl(dev, addr); 3963 3964 /* Only return duplicate errors if NLM_F_EXCL is set */ 3965 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 3966 err = 0; 3967 3968 return err; 3969 } 3970 EXPORT_SYMBOL(ndo_dflt_fdb_add); 3971 3972 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid, 3973 struct netlink_ext_ack *extack) 3974 { 3975 u16 vid = 0; 3976 3977 if (vlan_attr) { 3978 if (nla_len(vlan_attr) != sizeof(u16)) { 3979 NL_SET_ERR_MSG(extack, "invalid vlan attribute size"); 3980 return -EINVAL; 3981 } 3982 3983 vid = nla_get_u16(vlan_attr); 3984 3985 if (!vid || vid >= VLAN_VID_MASK) { 3986 NL_SET_ERR_MSG(extack, "invalid vlan id"); 3987 return -EINVAL; 3988 } 3989 } 3990 *p_vid = vid; 3991 return 0; 3992 } 3993 3994 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, 3995 struct netlink_ext_ack *extack) 3996 { 3997 struct net *net = sock_net(skb->sk); 3998 struct ndmsg *ndm; 3999 struct nlattr *tb[NDA_MAX+1]; 4000 struct net_device *dev; 4001 u8 *addr; 4002 u16 vid; 4003 int err; 4004 4005 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, 4006 extack); 4007 if (err < 0) 4008 return err; 4009 4010 ndm = nlmsg_data(nlh); 4011 if (ndm->ndm_ifindex == 0) { 4012 NL_SET_ERR_MSG(extack, "invalid ifindex"); 4013 return -EINVAL; 4014 } 4015 4016 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 4017 if (dev == NULL) { 4018 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4019 return -ENODEV; 4020 } 4021 4022 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 4023 NL_SET_ERR_MSG(extack, "invalid address"); 4024 return -EINVAL; 4025 } 4026 4027 if (dev->type != ARPHRD_ETHER) { 4028 NL_SET_ERR_MSG(extack, "FDB add only supported for Ethernet devices"); 4029 return -EINVAL; 4030 } 4031 4032 addr = nla_data(tb[NDA_LLADDR]); 4033 4034 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 4035 if (err) 4036 return err; 4037 4038 err = -EOPNOTSUPP; 4039 4040 /* Support fdb on master device the net/bridge default case */ 4041 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 4042 netif_is_bridge_port(dev)) { 4043 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4044 const struct net_device_ops *ops = br_dev->netdev_ops; 4045 4046 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 4047 nlh->nlmsg_flags, extack); 4048 if (err) 4049 goto out; 4050 else 4051 ndm->ndm_flags &= ~NTF_MASTER; 4052 } 4053 4054 /* Embedded bridge, macvlan, and any other device support */ 4055 if ((ndm->ndm_flags & NTF_SELF)) { 4056 if (dev->netdev_ops->ndo_fdb_add) 4057 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 4058 vid, 4059 nlh->nlmsg_flags, 4060 extack); 4061 else 4062 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 4063 nlh->nlmsg_flags); 4064 4065 if (!err) { 4066 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 4067 ndm->ndm_state); 4068 ndm->ndm_flags &= ~NTF_SELF; 4069 } 4070 } 4071 out: 4072 return err; 4073 } 4074 4075 /* 4076 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 4077 */ 4078 int ndo_dflt_fdb_del(struct ndmsg *ndm, 4079 struct nlattr *tb[], 4080 struct net_device *dev, 4081 const unsigned char *addr, u16 vid) 4082 { 4083 int err = -EINVAL; 4084 4085 /* If aging addresses are supported device will need to 4086 * implement its own handler for this. 4087 */ 4088 if (!(ndm->ndm_state & NUD_PERMANENT)) { 4089 netdev_info(dev, "default FDB implementation only supports local addresses\n"); 4090 return err; 4091 } 4092 4093 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 4094 err = dev_uc_del(dev, addr); 4095 else if (is_multicast_ether_addr(addr)) 4096 err = dev_mc_del(dev, addr); 4097 4098 return err; 4099 } 4100 EXPORT_SYMBOL(ndo_dflt_fdb_del); 4101 4102 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, 4103 struct netlink_ext_ack *extack) 4104 { 4105 struct net *net = sock_net(skb->sk); 4106 struct ndmsg *ndm; 4107 struct nlattr *tb[NDA_MAX+1]; 4108 struct net_device *dev; 4109 __u8 *addr; 4110 int err; 4111 u16 vid; 4112 4113 if (!netlink_capable(skb, CAP_NET_ADMIN)) 4114 return -EPERM; 4115 4116 err = nlmsg_parse_deprecated(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, 4117 extack); 4118 if (err < 0) 4119 return err; 4120 4121 ndm = nlmsg_data(nlh); 4122 if (ndm->ndm_ifindex == 0) { 4123 NL_SET_ERR_MSG(extack, "invalid ifindex"); 4124 return -EINVAL; 4125 } 4126 4127 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 4128 if (dev == NULL) { 4129 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4130 return -ENODEV; 4131 } 4132 4133 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 4134 NL_SET_ERR_MSG(extack, "invalid address"); 4135 return -EINVAL; 4136 } 4137 4138 if (dev->type != ARPHRD_ETHER) { 4139 NL_SET_ERR_MSG(extack, "FDB delete only supported for Ethernet devices"); 4140 return -EINVAL; 4141 } 4142 4143 addr = nla_data(tb[NDA_LLADDR]); 4144 4145 err = fdb_vid_parse(tb[NDA_VLAN], &vid, extack); 4146 if (err) 4147 return err; 4148 4149 err = -EOPNOTSUPP; 4150 4151 /* Support fdb on master device the net/bridge default case */ 4152 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 4153 netif_is_bridge_port(dev)) { 4154 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4155 const struct net_device_ops *ops = br_dev->netdev_ops; 4156 4157 if (ops->ndo_fdb_del) 4158 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 4159 4160 if (err) 4161 goto out; 4162 else 4163 ndm->ndm_flags &= ~NTF_MASTER; 4164 } 4165 4166 /* Embedded bridge, macvlan, and any other device support */ 4167 if (ndm->ndm_flags & NTF_SELF) { 4168 if (dev->netdev_ops->ndo_fdb_del) 4169 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 4170 vid); 4171 else 4172 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 4173 4174 if (!err) { 4175 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 4176 ndm->ndm_state); 4177 ndm->ndm_flags &= ~NTF_SELF; 4178 } 4179 } 4180 out: 4181 return err; 4182 } 4183 4184 static int nlmsg_populate_fdb(struct sk_buff *skb, 4185 struct netlink_callback *cb, 4186 struct net_device *dev, 4187 int *idx, 4188 struct netdev_hw_addr_list *list) 4189 { 4190 struct netdev_hw_addr *ha; 4191 int err; 4192 u32 portid, seq; 4193 4194 portid = NETLINK_CB(cb->skb).portid; 4195 seq = cb->nlh->nlmsg_seq; 4196 4197 list_for_each_entry(ha, &list->list, list) { 4198 if (*idx < cb->args[2]) 4199 goto skip; 4200 4201 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 4202 portid, seq, 4203 RTM_NEWNEIGH, NTF_SELF, 4204 NLM_F_MULTI, NUD_PERMANENT); 4205 if (err < 0) 4206 return err; 4207 skip: 4208 *idx += 1; 4209 } 4210 return 0; 4211 } 4212 4213 /** 4214 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 4215 * @skb: socket buffer to store message in 4216 * @cb: netlink callback 4217 * @dev: netdevice 4218 * @filter_dev: ignored 4219 * @idx: the number of FDB table entries dumped is added to *@idx 4220 * 4221 * Default netdevice operation to dump the existing unicast address list. 4222 * Returns number of addresses from list put in skb. 4223 */ 4224 int ndo_dflt_fdb_dump(struct sk_buff *skb, 4225 struct netlink_callback *cb, 4226 struct net_device *dev, 4227 struct net_device *filter_dev, 4228 int *idx) 4229 { 4230 int err; 4231 4232 if (dev->type != ARPHRD_ETHER) 4233 return -EINVAL; 4234 4235 netif_addr_lock_bh(dev); 4236 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 4237 if (err) 4238 goto out; 4239 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 4240 out: 4241 netif_addr_unlock_bh(dev); 4242 return err; 4243 } 4244 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 4245 4246 static int valid_fdb_dump_strict(const struct nlmsghdr *nlh, 4247 int *br_idx, int *brport_idx, 4248 struct netlink_ext_ack *extack) 4249 { 4250 struct nlattr *tb[NDA_MAX + 1]; 4251 struct ndmsg *ndm; 4252 int err, i; 4253 4254 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { 4255 NL_SET_ERR_MSG(extack, "Invalid header for fdb dump request"); 4256 return -EINVAL; 4257 } 4258 4259 ndm = nlmsg_data(nlh); 4260 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || 4261 ndm->ndm_flags || ndm->ndm_type) { 4262 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb dump request"); 4263 return -EINVAL; 4264 } 4265 4266 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, 4267 NDA_MAX, NULL, extack); 4268 if (err < 0) 4269 return err; 4270 4271 *brport_idx = ndm->ndm_ifindex; 4272 for (i = 0; i <= NDA_MAX; ++i) { 4273 if (!tb[i]) 4274 continue; 4275 4276 switch (i) { 4277 case NDA_IFINDEX: 4278 if (nla_len(tb[i]) != sizeof(u32)) { 4279 NL_SET_ERR_MSG(extack, "Invalid IFINDEX attribute in fdb dump request"); 4280 return -EINVAL; 4281 } 4282 *brport_idx = nla_get_u32(tb[NDA_IFINDEX]); 4283 break; 4284 case NDA_MASTER: 4285 if (nla_len(tb[i]) != sizeof(u32)) { 4286 NL_SET_ERR_MSG(extack, "Invalid MASTER attribute in fdb dump request"); 4287 return -EINVAL; 4288 } 4289 *br_idx = nla_get_u32(tb[NDA_MASTER]); 4290 break; 4291 default: 4292 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb dump request"); 4293 return -EINVAL; 4294 } 4295 } 4296 4297 return 0; 4298 } 4299 4300 static int valid_fdb_dump_legacy(const struct nlmsghdr *nlh, 4301 int *br_idx, int *brport_idx, 4302 struct netlink_ext_ack *extack) 4303 { 4304 struct nlattr *tb[IFLA_MAX+1]; 4305 int err; 4306 4307 /* A hack to preserve kernel<->userspace interface. 4308 * Before Linux v4.12 this code accepted ndmsg since iproute2 v3.3.0. 4309 * However, ndmsg is shorter than ifinfomsg thus nlmsg_parse() bails. 4310 * So, check for ndmsg with an optional u32 attribute (not used here). 4311 * Fortunately these sizes don't conflict with the size of ifinfomsg 4312 * with an optional attribute. 4313 */ 4314 if (nlmsg_len(nlh) != sizeof(struct ndmsg) && 4315 (nlmsg_len(nlh) != sizeof(struct ndmsg) + 4316 nla_attr_size(sizeof(u32)))) { 4317 struct ifinfomsg *ifm; 4318 4319 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), 4320 tb, IFLA_MAX, ifla_policy, 4321 extack); 4322 if (err < 0) { 4323 return -EINVAL; 4324 } else if (err == 0) { 4325 if (tb[IFLA_MASTER]) 4326 *br_idx = nla_get_u32(tb[IFLA_MASTER]); 4327 } 4328 4329 ifm = nlmsg_data(nlh); 4330 *brport_idx = ifm->ifi_index; 4331 } 4332 return 0; 4333 } 4334 4335 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 4336 { 4337 struct net_device *dev; 4338 struct net_device *br_dev = NULL; 4339 const struct net_device_ops *ops = NULL; 4340 const struct net_device_ops *cops = NULL; 4341 struct net *net = sock_net(skb->sk); 4342 struct hlist_head *head; 4343 int brport_idx = 0; 4344 int br_idx = 0; 4345 int h, s_h; 4346 int idx = 0, s_idx; 4347 int err = 0; 4348 int fidx = 0; 4349 4350 if (cb->strict_check) 4351 err = valid_fdb_dump_strict(cb->nlh, &br_idx, &brport_idx, 4352 cb->extack); 4353 else 4354 err = valid_fdb_dump_legacy(cb->nlh, &br_idx, &brport_idx, 4355 cb->extack); 4356 if (err < 0) 4357 return err; 4358 4359 if (br_idx) { 4360 br_dev = __dev_get_by_index(net, br_idx); 4361 if (!br_dev) 4362 return -ENODEV; 4363 4364 ops = br_dev->netdev_ops; 4365 } 4366 4367 s_h = cb->args[0]; 4368 s_idx = cb->args[1]; 4369 4370 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4371 idx = 0; 4372 head = &net->dev_index_head[h]; 4373 hlist_for_each_entry(dev, head, index_hlist) { 4374 4375 if (brport_idx && (dev->ifindex != brport_idx)) 4376 continue; 4377 4378 if (!br_idx) { /* user did not specify a specific bridge */ 4379 if (netif_is_bridge_port(dev)) { 4380 br_dev = netdev_master_upper_dev_get(dev); 4381 cops = br_dev->netdev_ops; 4382 } 4383 } else { 4384 if (dev != br_dev && 4385 !netif_is_bridge_port(dev)) 4386 continue; 4387 4388 if (br_dev != netdev_master_upper_dev_get(dev) && 4389 !(dev->priv_flags & IFF_EBRIDGE)) 4390 continue; 4391 cops = ops; 4392 } 4393 4394 if (idx < s_idx) 4395 goto cont; 4396 4397 if (netif_is_bridge_port(dev)) { 4398 if (cops && cops->ndo_fdb_dump) { 4399 err = cops->ndo_fdb_dump(skb, cb, 4400 br_dev, dev, 4401 &fidx); 4402 if (err == -EMSGSIZE) 4403 goto out; 4404 } 4405 } 4406 4407 if (dev->netdev_ops->ndo_fdb_dump) 4408 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 4409 dev, NULL, 4410 &fidx); 4411 else 4412 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 4413 &fidx); 4414 if (err == -EMSGSIZE) 4415 goto out; 4416 4417 cops = NULL; 4418 4419 /* reset fdb offset to 0 for rest of the interfaces */ 4420 cb->args[2] = 0; 4421 fidx = 0; 4422 cont: 4423 idx++; 4424 } 4425 } 4426 4427 out: 4428 cb->args[0] = h; 4429 cb->args[1] = idx; 4430 cb->args[2] = fidx; 4431 4432 return skb->len; 4433 } 4434 4435 static int valid_fdb_get_strict(const struct nlmsghdr *nlh, 4436 struct nlattr **tb, u8 *ndm_flags, 4437 int *br_idx, int *brport_idx, u8 **addr, 4438 u16 *vid, struct netlink_ext_ack *extack) 4439 { 4440 struct ndmsg *ndm; 4441 int err, i; 4442 4443 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ndm))) { 4444 NL_SET_ERR_MSG(extack, "Invalid header for fdb get request"); 4445 return -EINVAL; 4446 } 4447 4448 ndm = nlmsg_data(nlh); 4449 if (ndm->ndm_pad1 || ndm->ndm_pad2 || ndm->ndm_state || 4450 ndm->ndm_type) { 4451 NL_SET_ERR_MSG(extack, "Invalid values in header for fdb get request"); 4452 return -EINVAL; 4453 } 4454 4455 if (ndm->ndm_flags & ~(NTF_MASTER | NTF_SELF)) { 4456 NL_SET_ERR_MSG(extack, "Invalid flags in header for fdb get request"); 4457 return -EINVAL; 4458 } 4459 4460 err = nlmsg_parse_deprecated_strict(nlh, sizeof(struct ndmsg), tb, 4461 NDA_MAX, nda_policy, extack); 4462 if (err < 0) 4463 return err; 4464 4465 *ndm_flags = ndm->ndm_flags; 4466 *brport_idx = ndm->ndm_ifindex; 4467 for (i = 0; i <= NDA_MAX; ++i) { 4468 if (!tb[i]) 4469 continue; 4470 4471 switch (i) { 4472 case NDA_MASTER: 4473 *br_idx = nla_get_u32(tb[i]); 4474 break; 4475 case NDA_LLADDR: 4476 if (nla_len(tb[i]) != ETH_ALEN) { 4477 NL_SET_ERR_MSG(extack, "Invalid address in fdb get request"); 4478 return -EINVAL; 4479 } 4480 *addr = nla_data(tb[i]); 4481 break; 4482 case NDA_VLAN: 4483 err = fdb_vid_parse(tb[i], vid, extack); 4484 if (err) 4485 return err; 4486 break; 4487 case NDA_VNI: 4488 break; 4489 default: 4490 NL_SET_ERR_MSG(extack, "Unsupported attribute in fdb get request"); 4491 return -EINVAL; 4492 } 4493 } 4494 4495 return 0; 4496 } 4497 4498 static int rtnl_fdb_get(struct sk_buff *in_skb, struct nlmsghdr *nlh, 4499 struct netlink_ext_ack *extack) 4500 { 4501 struct net_device *dev = NULL, *br_dev = NULL; 4502 const struct net_device_ops *ops = NULL; 4503 struct net *net = sock_net(in_skb->sk); 4504 struct nlattr *tb[NDA_MAX + 1]; 4505 struct sk_buff *skb; 4506 int brport_idx = 0; 4507 u8 ndm_flags = 0; 4508 int br_idx = 0; 4509 u8 *addr = NULL; 4510 u16 vid = 0; 4511 int err; 4512 4513 err = valid_fdb_get_strict(nlh, tb, &ndm_flags, &br_idx, 4514 &brport_idx, &addr, &vid, extack); 4515 if (err < 0) 4516 return err; 4517 4518 if (!addr) { 4519 NL_SET_ERR_MSG(extack, "Missing lookup address for fdb get request"); 4520 return -EINVAL; 4521 } 4522 4523 if (brport_idx) { 4524 dev = __dev_get_by_index(net, brport_idx); 4525 if (!dev) { 4526 NL_SET_ERR_MSG(extack, "Unknown device ifindex"); 4527 return -ENODEV; 4528 } 4529 } 4530 4531 if (br_idx) { 4532 if (dev) { 4533 NL_SET_ERR_MSG(extack, "Master and device are mutually exclusive"); 4534 return -EINVAL; 4535 } 4536 4537 br_dev = __dev_get_by_index(net, br_idx); 4538 if (!br_dev) { 4539 NL_SET_ERR_MSG(extack, "Invalid master ifindex"); 4540 return -EINVAL; 4541 } 4542 ops = br_dev->netdev_ops; 4543 } 4544 4545 if (dev) { 4546 if (!ndm_flags || (ndm_flags & NTF_MASTER)) { 4547 if (!netif_is_bridge_port(dev)) { 4548 NL_SET_ERR_MSG(extack, "Device is not a bridge port"); 4549 return -EINVAL; 4550 } 4551 br_dev = netdev_master_upper_dev_get(dev); 4552 if (!br_dev) { 4553 NL_SET_ERR_MSG(extack, "Master of device not found"); 4554 return -EINVAL; 4555 } 4556 ops = br_dev->netdev_ops; 4557 } else { 4558 if (!(ndm_flags & NTF_SELF)) { 4559 NL_SET_ERR_MSG(extack, "Missing NTF_SELF"); 4560 return -EINVAL; 4561 } 4562 ops = dev->netdev_ops; 4563 } 4564 } 4565 4566 if (!br_dev && !dev) { 4567 NL_SET_ERR_MSG(extack, "No device specified"); 4568 return -ENODEV; 4569 } 4570 4571 if (!ops || !ops->ndo_fdb_get) { 4572 NL_SET_ERR_MSG(extack, "Fdb get operation not supported by device"); 4573 return -EOPNOTSUPP; 4574 } 4575 4576 skb = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); 4577 if (!skb) 4578 return -ENOBUFS; 4579 4580 if (br_dev) 4581 dev = br_dev; 4582 err = ops->ndo_fdb_get(skb, tb, dev, addr, vid, 4583 NETLINK_CB(in_skb).portid, 4584 nlh->nlmsg_seq, extack); 4585 if (err) 4586 goto out; 4587 4588 return rtnl_unicast(skb, net, NETLINK_CB(in_skb).portid); 4589 out: 4590 kfree_skb(skb); 4591 return err; 4592 } 4593 4594 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 4595 unsigned int attrnum, unsigned int flag) 4596 { 4597 if (mask & flag) 4598 return nla_put_u8(skb, attrnum, !!(flags & flag)); 4599 return 0; 4600 } 4601 4602 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 4603 struct net_device *dev, u16 mode, 4604 u32 flags, u32 mask, int nlflags, 4605 u32 filter_mask, 4606 int (*vlan_fill)(struct sk_buff *skb, 4607 struct net_device *dev, 4608 u32 filter_mask)) 4609 { 4610 struct nlmsghdr *nlh; 4611 struct ifinfomsg *ifm; 4612 struct nlattr *br_afspec; 4613 struct nlattr *protinfo; 4614 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 4615 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4616 int err = 0; 4617 4618 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 4619 if (nlh == NULL) 4620 return -EMSGSIZE; 4621 4622 ifm = nlmsg_data(nlh); 4623 ifm->ifi_family = AF_BRIDGE; 4624 ifm->__ifi_pad = 0; 4625 ifm->ifi_type = dev->type; 4626 ifm->ifi_index = dev->ifindex; 4627 ifm->ifi_flags = dev_get_flags(dev); 4628 ifm->ifi_change = 0; 4629 4630 4631 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 4632 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 4633 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 4634 (br_dev && 4635 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 4636 (dev->addr_len && 4637 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 4638 (dev->ifindex != dev_get_iflink(dev) && 4639 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 4640 goto nla_put_failure; 4641 4642 br_afspec = nla_nest_start_noflag(skb, IFLA_AF_SPEC); 4643 if (!br_afspec) 4644 goto nla_put_failure; 4645 4646 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 4647 nla_nest_cancel(skb, br_afspec); 4648 goto nla_put_failure; 4649 } 4650 4651 if (mode != BRIDGE_MODE_UNDEF) { 4652 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 4653 nla_nest_cancel(skb, br_afspec); 4654 goto nla_put_failure; 4655 } 4656 } 4657 if (vlan_fill) { 4658 err = vlan_fill(skb, dev, filter_mask); 4659 if (err) { 4660 nla_nest_cancel(skb, br_afspec); 4661 goto nla_put_failure; 4662 } 4663 } 4664 nla_nest_end(skb, br_afspec); 4665 4666 protinfo = nla_nest_start(skb, IFLA_PROTINFO); 4667 if (!protinfo) 4668 goto nla_put_failure; 4669 4670 if (brport_nla_put_flag(skb, flags, mask, 4671 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 4672 brport_nla_put_flag(skb, flags, mask, 4673 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 4674 brport_nla_put_flag(skb, flags, mask, 4675 IFLA_BRPORT_FAST_LEAVE, 4676 BR_MULTICAST_FAST_LEAVE) || 4677 brport_nla_put_flag(skb, flags, mask, 4678 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 4679 brport_nla_put_flag(skb, flags, mask, 4680 IFLA_BRPORT_LEARNING, BR_LEARNING) || 4681 brport_nla_put_flag(skb, flags, mask, 4682 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 4683 brport_nla_put_flag(skb, flags, mask, 4684 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 4685 brport_nla_put_flag(skb, flags, mask, 4686 IFLA_BRPORT_PROXYARP, BR_PROXYARP) || 4687 brport_nla_put_flag(skb, flags, mask, 4688 IFLA_BRPORT_MCAST_FLOOD, BR_MCAST_FLOOD) || 4689 brport_nla_put_flag(skb, flags, mask, 4690 IFLA_BRPORT_BCAST_FLOOD, BR_BCAST_FLOOD)) { 4691 nla_nest_cancel(skb, protinfo); 4692 goto nla_put_failure; 4693 } 4694 4695 nla_nest_end(skb, protinfo); 4696 4697 nlmsg_end(skb, nlh); 4698 return 0; 4699 nla_put_failure: 4700 nlmsg_cancel(skb, nlh); 4701 return err ? err : -EMSGSIZE; 4702 } 4703 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 4704 4705 static int valid_bridge_getlink_req(const struct nlmsghdr *nlh, 4706 bool strict_check, u32 *filter_mask, 4707 struct netlink_ext_ack *extack) 4708 { 4709 struct nlattr *tb[IFLA_MAX+1]; 4710 int err, i; 4711 4712 if (strict_check) { 4713 struct ifinfomsg *ifm; 4714 4715 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifm))) { 4716 NL_SET_ERR_MSG(extack, "Invalid header for bridge link dump"); 4717 return -EINVAL; 4718 } 4719 4720 ifm = nlmsg_data(nlh); 4721 if (ifm->__ifi_pad || ifm->ifi_type || ifm->ifi_flags || 4722 ifm->ifi_change || ifm->ifi_index) { 4723 NL_SET_ERR_MSG(extack, "Invalid values in header for bridge link dump request"); 4724 return -EINVAL; 4725 } 4726 4727 err = nlmsg_parse_deprecated_strict(nlh, 4728 sizeof(struct ifinfomsg), 4729 tb, IFLA_MAX, ifla_policy, 4730 extack); 4731 } else { 4732 err = nlmsg_parse_deprecated(nlh, sizeof(struct ifinfomsg), 4733 tb, IFLA_MAX, ifla_policy, 4734 extack); 4735 } 4736 if (err < 0) 4737 return err; 4738 4739 /* new attributes should only be added with strict checking */ 4740 for (i = 0; i <= IFLA_MAX; ++i) { 4741 if (!tb[i]) 4742 continue; 4743 4744 switch (i) { 4745 case IFLA_EXT_MASK: 4746 *filter_mask = nla_get_u32(tb[i]); 4747 break; 4748 default: 4749 if (strict_check) { 4750 NL_SET_ERR_MSG(extack, "Unsupported attribute in bridge link dump request"); 4751 return -EINVAL; 4752 } 4753 } 4754 } 4755 4756 return 0; 4757 } 4758 4759 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 4760 { 4761 const struct nlmsghdr *nlh = cb->nlh; 4762 struct net *net = sock_net(skb->sk); 4763 struct net_device *dev; 4764 int idx = 0; 4765 u32 portid = NETLINK_CB(cb->skb).portid; 4766 u32 seq = nlh->nlmsg_seq; 4767 u32 filter_mask = 0; 4768 int err; 4769 4770 err = valid_bridge_getlink_req(nlh, cb->strict_check, &filter_mask, 4771 cb->extack); 4772 if (err < 0 && cb->strict_check) 4773 return err; 4774 4775 rcu_read_lock(); 4776 for_each_netdev_rcu(net, dev) { 4777 const struct net_device_ops *ops = dev->netdev_ops; 4778 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4779 4780 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 4781 if (idx >= cb->args[0]) { 4782 err = br_dev->netdev_ops->ndo_bridge_getlink( 4783 skb, portid, seq, dev, 4784 filter_mask, NLM_F_MULTI); 4785 if (err < 0 && err != -EOPNOTSUPP) { 4786 if (likely(skb->len)) 4787 break; 4788 4789 goto out_err; 4790 } 4791 } 4792 idx++; 4793 } 4794 4795 if (ops->ndo_bridge_getlink) { 4796 if (idx >= cb->args[0]) { 4797 err = ops->ndo_bridge_getlink(skb, portid, 4798 seq, dev, 4799 filter_mask, 4800 NLM_F_MULTI); 4801 if (err < 0 && err != -EOPNOTSUPP) { 4802 if (likely(skb->len)) 4803 break; 4804 4805 goto out_err; 4806 } 4807 } 4808 idx++; 4809 } 4810 } 4811 err = skb->len; 4812 out_err: 4813 rcu_read_unlock(); 4814 cb->args[0] = idx; 4815 4816 return err; 4817 } 4818 4819 static inline size_t bridge_nlmsg_size(void) 4820 { 4821 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 4822 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 4823 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 4824 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 4825 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 4826 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 4827 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 4828 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 4829 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 4830 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 4831 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 4832 } 4833 4834 static int rtnl_bridge_notify(struct net_device *dev) 4835 { 4836 struct net *net = dev_net(dev); 4837 struct sk_buff *skb; 4838 int err = -EOPNOTSUPP; 4839 4840 if (!dev->netdev_ops->ndo_bridge_getlink) 4841 return 0; 4842 4843 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 4844 if (!skb) { 4845 err = -ENOMEM; 4846 goto errout; 4847 } 4848 4849 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 4850 if (err < 0) 4851 goto errout; 4852 4853 /* Notification info is only filled for bridge ports, not the bridge 4854 * device itself. Therefore, a zero notification length is valid and 4855 * should not result in an error. 4856 */ 4857 if (!skb->len) 4858 goto errout; 4859 4860 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 4861 return 0; 4862 errout: 4863 WARN_ON(err == -EMSGSIZE); 4864 kfree_skb(skb); 4865 if (err) 4866 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 4867 return err; 4868 } 4869 4870 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 4871 struct netlink_ext_ack *extack) 4872 { 4873 struct net *net = sock_net(skb->sk); 4874 struct ifinfomsg *ifm; 4875 struct net_device *dev; 4876 struct nlattr *br_spec, *attr = NULL; 4877 int rem, err = -EOPNOTSUPP; 4878 u16 flags = 0; 4879 bool have_flags = false; 4880 4881 if (nlmsg_len(nlh) < sizeof(*ifm)) 4882 return -EINVAL; 4883 4884 ifm = nlmsg_data(nlh); 4885 if (ifm->ifi_family != AF_BRIDGE) 4886 return -EPFNOSUPPORT; 4887 4888 dev = __dev_get_by_index(net, ifm->ifi_index); 4889 if (!dev) { 4890 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4891 return -ENODEV; 4892 } 4893 4894 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 4895 if (br_spec) { 4896 nla_for_each_nested(attr, br_spec, rem) { 4897 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 4898 if (nla_len(attr) < sizeof(flags)) 4899 return -EINVAL; 4900 4901 have_flags = true; 4902 flags = nla_get_u16(attr); 4903 break; 4904 } 4905 } 4906 } 4907 4908 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 4909 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4910 4911 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 4912 err = -EOPNOTSUPP; 4913 goto out; 4914 } 4915 4916 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags, 4917 extack); 4918 if (err) 4919 goto out; 4920 4921 flags &= ~BRIDGE_FLAGS_MASTER; 4922 } 4923 4924 if ((flags & BRIDGE_FLAGS_SELF)) { 4925 if (!dev->netdev_ops->ndo_bridge_setlink) 4926 err = -EOPNOTSUPP; 4927 else 4928 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 4929 flags, 4930 extack); 4931 if (!err) { 4932 flags &= ~BRIDGE_FLAGS_SELF; 4933 4934 /* Generate event to notify upper layer of bridge 4935 * change 4936 */ 4937 err = rtnl_bridge_notify(dev); 4938 } 4939 } 4940 4941 if (have_flags) 4942 memcpy(nla_data(attr), &flags, sizeof(flags)); 4943 out: 4944 return err; 4945 } 4946 4947 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 4948 struct netlink_ext_ack *extack) 4949 { 4950 struct net *net = sock_net(skb->sk); 4951 struct ifinfomsg *ifm; 4952 struct net_device *dev; 4953 struct nlattr *br_spec, *attr = NULL; 4954 int rem, err = -EOPNOTSUPP; 4955 u16 flags = 0; 4956 bool have_flags = false; 4957 4958 if (nlmsg_len(nlh) < sizeof(*ifm)) 4959 return -EINVAL; 4960 4961 ifm = nlmsg_data(nlh); 4962 if (ifm->ifi_family != AF_BRIDGE) 4963 return -EPFNOSUPPORT; 4964 4965 dev = __dev_get_by_index(net, ifm->ifi_index); 4966 if (!dev) { 4967 NL_SET_ERR_MSG(extack, "unknown ifindex"); 4968 return -ENODEV; 4969 } 4970 4971 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 4972 if (br_spec) { 4973 nla_for_each_nested(attr, br_spec, rem) { 4974 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 4975 if (nla_len(attr) < sizeof(flags)) 4976 return -EINVAL; 4977 4978 have_flags = true; 4979 flags = nla_get_u16(attr); 4980 break; 4981 } 4982 } 4983 } 4984 4985 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 4986 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 4987 4988 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 4989 err = -EOPNOTSUPP; 4990 goto out; 4991 } 4992 4993 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 4994 if (err) 4995 goto out; 4996 4997 flags &= ~BRIDGE_FLAGS_MASTER; 4998 } 4999 5000 if ((flags & BRIDGE_FLAGS_SELF)) { 5001 if (!dev->netdev_ops->ndo_bridge_dellink) 5002 err = -EOPNOTSUPP; 5003 else 5004 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 5005 flags); 5006 5007 if (!err) { 5008 flags &= ~BRIDGE_FLAGS_SELF; 5009 5010 /* Generate event to notify upper layer of bridge 5011 * change 5012 */ 5013 err = rtnl_bridge_notify(dev); 5014 } 5015 } 5016 5017 if (have_flags) 5018 memcpy(nla_data(attr), &flags, sizeof(flags)); 5019 out: 5020 return err; 5021 } 5022 5023 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 5024 { 5025 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 5026 (!idxattr || idxattr == attrid); 5027 } 5028 5029 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 5030 static int rtnl_get_offload_stats_attr_size(int attr_id) 5031 { 5032 switch (attr_id) { 5033 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 5034 return sizeof(struct rtnl_link_stats64); 5035 } 5036 5037 return 0; 5038 } 5039 5040 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 5041 int *prividx) 5042 { 5043 struct nlattr *attr = NULL; 5044 int attr_id, size; 5045 void *attr_data; 5046 int err; 5047 5048 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 5049 dev->netdev_ops->ndo_get_offload_stats)) 5050 return -ENODATA; 5051 5052 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 5053 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 5054 if (attr_id < *prividx) 5055 continue; 5056 5057 size = rtnl_get_offload_stats_attr_size(attr_id); 5058 if (!size) 5059 continue; 5060 5061 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 5062 continue; 5063 5064 attr = nla_reserve_64bit(skb, attr_id, size, 5065 IFLA_OFFLOAD_XSTATS_UNSPEC); 5066 if (!attr) 5067 goto nla_put_failure; 5068 5069 attr_data = nla_data(attr); 5070 memset(attr_data, 0, size); 5071 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 5072 attr_data); 5073 if (err) 5074 goto get_offload_stats_failure; 5075 } 5076 5077 if (!attr) 5078 return -ENODATA; 5079 5080 *prividx = 0; 5081 return 0; 5082 5083 nla_put_failure: 5084 err = -EMSGSIZE; 5085 get_offload_stats_failure: 5086 *prividx = attr_id; 5087 return err; 5088 } 5089 5090 static int rtnl_get_offload_stats_size(const struct net_device *dev) 5091 { 5092 int nla_size = 0; 5093 int attr_id; 5094 int size; 5095 5096 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 5097 dev->netdev_ops->ndo_get_offload_stats)) 5098 return 0; 5099 5100 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 5101 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 5102 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 5103 continue; 5104 size = rtnl_get_offload_stats_attr_size(attr_id); 5105 nla_size += nla_total_size_64bit(size); 5106 } 5107 5108 if (nla_size != 0) 5109 nla_size += nla_total_size(0); 5110 5111 return nla_size; 5112 } 5113 5114 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 5115 int type, u32 pid, u32 seq, u32 change, 5116 unsigned int flags, unsigned int filter_mask, 5117 int *idxattr, int *prividx) 5118 { 5119 struct if_stats_msg *ifsm; 5120 struct nlmsghdr *nlh; 5121 struct nlattr *attr; 5122 int s_prividx = *prividx; 5123 int err; 5124 5125 ASSERT_RTNL(); 5126 5127 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 5128 if (!nlh) 5129 return -EMSGSIZE; 5130 5131 ifsm = nlmsg_data(nlh); 5132 ifsm->family = PF_UNSPEC; 5133 ifsm->pad1 = 0; 5134 ifsm->pad2 = 0; 5135 ifsm->ifindex = dev->ifindex; 5136 ifsm->filter_mask = filter_mask; 5137 5138 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 5139 struct rtnl_link_stats64 *sp; 5140 5141 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 5142 sizeof(struct rtnl_link_stats64), 5143 IFLA_STATS_UNSPEC); 5144 if (!attr) 5145 goto nla_put_failure; 5146 5147 sp = nla_data(attr); 5148 dev_get_stats(dev, sp); 5149 } 5150 5151 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 5152 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 5153 5154 if (ops && ops->fill_linkxstats) { 5155 *idxattr = IFLA_STATS_LINK_XSTATS; 5156 attr = nla_nest_start_noflag(skb, 5157 IFLA_STATS_LINK_XSTATS); 5158 if (!attr) 5159 goto nla_put_failure; 5160 5161 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 5162 nla_nest_end(skb, attr); 5163 if (err) 5164 goto nla_put_failure; 5165 *idxattr = 0; 5166 } 5167 } 5168 5169 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 5170 *idxattr)) { 5171 const struct rtnl_link_ops *ops = NULL; 5172 const struct net_device *master; 5173 5174 master = netdev_master_upper_dev_get(dev); 5175 if (master) 5176 ops = master->rtnl_link_ops; 5177 if (ops && ops->fill_linkxstats) { 5178 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 5179 attr = nla_nest_start_noflag(skb, 5180 IFLA_STATS_LINK_XSTATS_SLAVE); 5181 if (!attr) 5182 goto nla_put_failure; 5183 5184 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 5185 nla_nest_end(skb, attr); 5186 if (err) 5187 goto nla_put_failure; 5188 *idxattr = 0; 5189 } 5190 } 5191 5192 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 5193 *idxattr)) { 5194 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 5195 attr = nla_nest_start_noflag(skb, 5196 IFLA_STATS_LINK_OFFLOAD_XSTATS); 5197 if (!attr) 5198 goto nla_put_failure; 5199 5200 err = rtnl_get_offload_stats(skb, dev, prividx); 5201 if (err == -ENODATA) 5202 nla_nest_cancel(skb, attr); 5203 else 5204 nla_nest_end(skb, attr); 5205 5206 if (err && err != -ENODATA) 5207 goto nla_put_failure; 5208 *idxattr = 0; 5209 } 5210 5211 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 5212 struct rtnl_af_ops *af_ops; 5213 5214 *idxattr = IFLA_STATS_AF_SPEC; 5215 attr = nla_nest_start_noflag(skb, IFLA_STATS_AF_SPEC); 5216 if (!attr) 5217 goto nla_put_failure; 5218 5219 rcu_read_lock(); 5220 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 5221 if (af_ops->fill_stats_af) { 5222 struct nlattr *af; 5223 int err; 5224 5225 af = nla_nest_start_noflag(skb, 5226 af_ops->family); 5227 if (!af) { 5228 rcu_read_unlock(); 5229 goto nla_put_failure; 5230 } 5231 err = af_ops->fill_stats_af(skb, dev); 5232 5233 if (err == -ENODATA) { 5234 nla_nest_cancel(skb, af); 5235 } else if (err < 0) { 5236 rcu_read_unlock(); 5237 goto nla_put_failure; 5238 } 5239 5240 nla_nest_end(skb, af); 5241 } 5242 } 5243 rcu_read_unlock(); 5244 5245 nla_nest_end(skb, attr); 5246 5247 *idxattr = 0; 5248 } 5249 5250 nlmsg_end(skb, nlh); 5251 5252 return 0; 5253 5254 nla_put_failure: 5255 /* not a multi message or no progress mean a real error */ 5256 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 5257 nlmsg_cancel(skb, nlh); 5258 else 5259 nlmsg_end(skb, nlh); 5260 5261 return -EMSGSIZE; 5262 } 5263 5264 static size_t if_nlmsg_stats_size(const struct net_device *dev, 5265 u32 filter_mask) 5266 { 5267 size_t size = 0; 5268 5269 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 5270 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 5271 5272 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 5273 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 5274 int attr = IFLA_STATS_LINK_XSTATS; 5275 5276 if (ops && ops->get_linkxstats_size) { 5277 size += nla_total_size(ops->get_linkxstats_size(dev, 5278 attr)); 5279 /* for IFLA_STATS_LINK_XSTATS */ 5280 size += nla_total_size(0); 5281 } 5282 } 5283 5284 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 5285 struct net_device *_dev = (struct net_device *)dev; 5286 const struct rtnl_link_ops *ops = NULL; 5287 const struct net_device *master; 5288 5289 /* netdev_master_upper_dev_get can't take const */ 5290 master = netdev_master_upper_dev_get(_dev); 5291 if (master) 5292 ops = master->rtnl_link_ops; 5293 if (ops && ops->get_linkxstats_size) { 5294 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 5295 5296 size += nla_total_size(ops->get_linkxstats_size(dev, 5297 attr)); 5298 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 5299 size += nla_total_size(0); 5300 } 5301 } 5302 5303 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 5304 size += rtnl_get_offload_stats_size(dev); 5305 5306 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 5307 struct rtnl_af_ops *af_ops; 5308 5309 /* for IFLA_STATS_AF_SPEC */ 5310 size += nla_total_size(0); 5311 5312 rcu_read_lock(); 5313 list_for_each_entry_rcu(af_ops, &rtnl_af_ops, list) { 5314 if (af_ops->get_stats_af_size) { 5315 size += nla_total_size( 5316 af_ops->get_stats_af_size(dev)); 5317 5318 /* for AF_* */ 5319 size += nla_total_size(0); 5320 } 5321 } 5322 rcu_read_unlock(); 5323 } 5324 5325 return size; 5326 } 5327 5328 static int rtnl_valid_stats_req(const struct nlmsghdr *nlh, bool strict_check, 5329 bool is_dump, struct netlink_ext_ack *extack) 5330 { 5331 struct if_stats_msg *ifsm; 5332 5333 if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*ifsm))) { 5334 NL_SET_ERR_MSG(extack, "Invalid header for stats dump"); 5335 return -EINVAL; 5336 } 5337 5338 if (!strict_check) 5339 return 0; 5340 5341 ifsm = nlmsg_data(nlh); 5342 5343 /* only requests using strict checks can pass data to influence 5344 * the dump. The legacy exception is filter_mask. 5345 */ 5346 if (ifsm->pad1 || ifsm->pad2 || (is_dump && ifsm->ifindex)) { 5347 NL_SET_ERR_MSG(extack, "Invalid values in header for stats dump request"); 5348 return -EINVAL; 5349 } 5350 if (nlmsg_attrlen(nlh, sizeof(*ifsm))) { 5351 NL_SET_ERR_MSG(extack, "Invalid attributes after stats header"); 5352 return -EINVAL; 5353 } 5354 if (ifsm->filter_mask >= IFLA_STATS_FILTER_BIT(IFLA_STATS_MAX + 1)) { 5355 NL_SET_ERR_MSG(extack, "Invalid stats requested through filter mask"); 5356 return -EINVAL; 5357 } 5358 5359 return 0; 5360 } 5361 5362 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, 5363 struct netlink_ext_ack *extack) 5364 { 5365 struct net *net = sock_net(skb->sk); 5366 struct net_device *dev = NULL; 5367 int idxattr = 0, prividx = 0; 5368 struct if_stats_msg *ifsm; 5369 struct sk_buff *nskb; 5370 u32 filter_mask; 5371 int err; 5372 5373 err = rtnl_valid_stats_req(nlh, netlink_strict_get_check(skb), 5374 false, extack); 5375 if (err) 5376 return err; 5377 5378 ifsm = nlmsg_data(nlh); 5379 if (ifsm->ifindex > 0) 5380 dev = __dev_get_by_index(net, ifsm->ifindex); 5381 else 5382 return -EINVAL; 5383 5384 if (!dev) 5385 return -ENODEV; 5386 5387 filter_mask = ifsm->filter_mask; 5388 if (!filter_mask) 5389 return -EINVAL; 5390 5391 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 5392 if (!nskb) 5393 return -ENOBUFS; 5394 5395 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 5396 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 5397 0, filter_mask, &idxattr, &prividx); 5398 if (err < 0) { 5399 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 5400 WARN_ON(err == -EMSGSIZE); 5401 kfree_skb(nskb); 5402 } else { 5403 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 5404 } 5405 5406 return err; 5407 } 5408 5409 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 5410 { 5411 struct netlink_ext_ack *extack = cb->extack; 5412 int h, s_h, err, s_idx, s_idxattr, s_prividx; 5413 struct net *net = sock_net(skb->sk); 5414 unsigned int flags = NLM_F_MULTI; 5415 struct if_stats_msg *ifsm; 5416 struct hlist_head *head; 5417 struct net_device *dev; 5418 u32 filter_mask = 0; 5419 int idx = 0; 5420 5421 s_h = cb->args[0]; 5422 s_idx = cb->args[1]; 5423 s_idxattr = cb->args[2]; 5424 s_prividx = cb->args[3]; 5425 5426 cb->seq = net->dev_base_seq; 5427 5428 err = rtnl_valid_stats_req(cb->nlh, cb->strict_check, true, extack); 5429 if (err) 5430 return err; 5431 5432 ifsm = nlmsg_data(cb->nlh); 5433 filter_mask = ifsm->filter_mask; 5434 if (!filter_mask) { 5435 NL_SET_ERR_MSG(extack, "Filter mask must be set for stats dump"); 5436 return -EINVAL; 5437 } 5438 5439 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 5440 idx = 0; 5441 head = &net->dev_index_head[h]; 5442 hlist_for_each_entry(dev, head, index_hlist) { 5443 if (idx < s_idx) 5444 goto cont; 5445 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 5446 NETLINK_CB(cb->skb).portid, 5447 cb->nlh->nlmsg_seq, 0, 5448 flags, filter_mask, 5449 &s_idxattr, &s_prividx); 5450 /* If we ran out of room on the first message, 5451 * we're in trouble 5452 */ 5453 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 5454 5455 if (err < 0) 5456 goto out; 5457 s_prividx = 0; 5458 s_idxattr = 0; 5459 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 5460 cont: 5461 idx++; 5462 } 5463 } 5464 out: 5465 cb->args[3] = s_prividx; 5466 cb->args[2] = s_idxattr; 5467 cb->args[1] = idx; 5468 cb->args[0] = h; 5469 5470 return skb->len; 5471 } 5472 5473 /* Process one rtnetlink message. */ 5474 5475 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 5476 struct netlink_ext_ack *extack) 5477 { 5478 struct net *net = sock_net(skb->sk); 5479 struct rtnl_link *link; 5480 struct module *owner; 5481 int err = -EOPNOTSUPP; 5482 rtnl_doit_func doit; 5483 unsigned int flags; 5484 int kind; 5485 int family; 5486 int type; 5487 5488 type = nlh->nlmsg_type; 5489 if (type > RTM_MAX) 5490 return -EOPNOTSUPP; 5491 5492 type -= RTM_BASE; 5493 5494 /* All the messages must have at least 1 byte length */ 5495 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 5496 return 0; 5497 5498 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 5499 kind = type&3; 5500 5501 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 5502 return -EPERM; 5503 5504 rcu_read_lock(); 5505 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 5506 struct sock *rtnl; 5507 rtnl_dumpit_func dumpit; 5508 u32 min_dump_alloc = 0; 5509 5510 link = rtnl_get_link(family, type); 5511 if (!link || !link->dumpit) { 5512 family = PF_UNSPEC; 5513 link = rtnl_get_link(family, type); 5514 if (!link || !link->dumpit) 5515 goto err_unlock; 5516 } 5517 owner = link->owner; 5518 dumpit = link->dumpit; 5519 5520 if (type == RTM_GETLINK - RTM_BASE) 5521 min_dump_alloc = rtnl_calcit(skb, nlh); 5522 5523 err = 0; 5524 /* need to do this before rcu_read_unlock() */ 5525 if (!try_module_get(owner)) 5526 err = -EPROTONOSUPPORT; 5527 5528 rcu_read_unlock(); 5529 5530 rtnl = net->rtnl; 5531 if (err == 0) { 5532 struct netlink_dump_control c = { 5533 .dump = dumpit, 5534 .min_dump_alloc = min_dump_alloc, 5535 .module = owner, 5536 }; 5537 err = netlink_dump_start(rtnl, skb, nlh, &c); 5538 /* netlink_dump_start() will keep a reference on 5539 * module if dump is still in progress. 5540 */ 5541 module_put(owner); 5542 } 5543 return err; 5544 } 5545 5546 link = rtnl_get_link(family, type); 5547 if (!link || !link->doit) { 5548 family = PF_UNSPEC; 5549 link = rtnl_get_link(PF_UNSPEC, type); 5550 if (!link || !link->doit) 5551 goto out_unlock; 5552 } 5553 5554 owner = link->owner; 5555 if (!try_module_get(owner)) { 5556 err = -EPROTONOSUPPORT; 5557 goto out_unlock; 5558 } 5559 5560 flags = link->flags; 5561 if (flags & RTNL_FLAG_DOIT_UNLOCKED) { 5562 doit = link->doit; 5563 rcu_read_unlock(); 5564 if (doit) 5565 err = doit(skb, nlh, extack); 5566 module_put(owner); 5567 return err; 5568 } 5569 rcu_read_unlock(); 5570 5571 rtnl_lock(); 5572 link = rtnl_get_link(family, type); 5573 if (link && link->doit) 5574 err = link->doit(skb, nlh, extack); 5575 rtnl_unlock(); 5576 5577 module_put(owner); 5578 5579 return err; 5580 5581 out_unlock: 5582 rcu_read_unlock(); 5583 return err; 5584 5585 err_unlock: 5586 rcu_read_unlock(); 5587 return -EOPNOTSUPP; 5588 } 5589 5590 static void rtnetlink_rcv(struct sk_buff *skb) 5591 { 5592 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 5593 } 5594 5595 static int rtnetlink_bind(struct net *net, int group) 5596 { 5597 switch (group) { 5598 case RTNLGRP_IPV4_MROUTE_R: 5599 case RTNLGRP_IPV6_MROUTE_R: 5600 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 5601 return -EPERM; 5602 break; 5603 } 5604 return 0; 5605 } 5606 5607 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 5608 { 5609 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 5610 5611 switch (event) { 5612 case NETDEV_REBOOT: 5613 case NETDEV_CHANGEMTU: 5614 case NETDEV_CHANGEADDR: 5615 case NETDEV_CHANGENAME: 5616 case NETDEV_FEAT_CHANGE: 5617 case NETDEV_BONDING_FAILOVER: 5618 case NETDEV_POST_TYPE_CHANGE: 5619 case NETDEV_NOTIFY_PEERS: 5620 case NETDEV_CHANGEUPPER: 5621 case NETDEV_RESEND_IGMP: 5622 case NETDEV_CHANGEINFODATA: 5623 case NETDEV_CHANGELOWERSTATE: 5624 case NETDEV_CHANGE_TX_QUEUE_LEN: 5625 rtmsg_ifinfo_event(RTM_NEWLINK, dev, 0, rtnl_get_event(event), 5626 GFP_KERNEL, NULL, 0); 5627 break; 5628 default: 5629 break; 5630 } 5631 return NOTIFY_DONE; 5632 } 5633 5634 static struct notifier_block rtnetlink_dev_notifier = { 5635 .notifier_call = rtnetlink_event, 5636 }; 5637 5638 5639 static int __net_init rtnetlink_net_init(struct net *net) 5640 { 5641 struct sock *sk; 5642 struct netlink_kernel_cfg cfg = { 5643 .groups = RTNLGRP_MAX, 5644 .input = rtnetlink_rcv, 5645 .cb_mutex = &rtnl_mutex, 5646 .flags = NL_CFG_F_NONROOT_RECV, 5647 .bind = rtnetlink_bind, 5648 }; 5649 5650 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 5651 if (!sk) 5652 return -ENOMEM; 5653 net->rtnl = sk; 5654 return 0; 5655 } 5656 5657 static void __net_exit rtnetlink_net_exit(struct net *net) 5658 { 5659 netlink_kernel_release(net->rtnl); 5660 net->rtnl = NULL; 5661 } 5662 5663 static struct pernet_operations rtnetlink_net_ops = { 5664 .init = rtnetlink_net_init, 5665 .exit = rtnetlink_net_exit, 5666 }; 5667 5668 void __init rtnetlink_init(void) 5669 { 5670 if (register_pernet_subsys(&rtnetlink_net_ops)) 5671 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 5672 5673 register_netdevice_notifier(&rtnetlink_dev_notifier); 5674 5675 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 5676 rtnl_dump_ifinfo, 0); 5677 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, 0); 5678 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, 0); 5679 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, 0); 5680 5681 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, 0); 5682 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, 0); 5683 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, 0); 5684 5685 rtnl_register(PF_UNSPEC, RTM_NEWLINKPROP, rtnl_newlinkprop, NULL, 0); 5686 rtnl_register(PF_UNSPEC, RTM_DELLINKPROP, rtnl_dellinkprop, NULL, 0); 5687 5688 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, 0); 5689 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, 0); 5690 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, rtnl_fdb_get, rtnl_fdb_dump, 0); 5691 5692 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, 0); 5693 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, 0); 5694 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, 0); 5695 5696 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 5697 0); 5698 } 5699