1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Routing netlink socket interface: protocol independent part. 7 * 8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 * 15 * Fixes: 16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong. 17 */ 18 19 #include <linux/errno.h> 20 #include <linux/module.h> 21 #include <linux/types.h> 22 #include <linux/socket.h> 23 #include <linux/kernel.h> 24 #include <linux/timer.h> 25 #include <linux/string.h> 26 #include <linux/sockios.h> 27 #include <linux/net.h> 28 #include <linux/fcntl.h> 29 #include <linux/mm.h> 30 #include <linux/slab.h> 31 #include <linux/interrupt.h> 32 #include <linux/capability.h> 33 #include <linux/skbuff.h> 34 #include <linux/init.h> 35 #include <linux/security.h> 36 #include <linux/mutex.h> 37 #include <linux/if_addr.h> 38 #include <linux/if_bridge.h> 39 #include <linux/if_vlan.h> 40 #include <linux/pci.h> 41 #include <linux/etherdevice.h> 42 43 #include <asm/uaccess.h> 44 45 #include <linux/inet.h> 46 #include <linux/netdevice.h> 47 #include <net/switchdev.h> 48 #include <net/ip.h> 49 #include <net/protocol.h> 50 #include <net/arp.h> 51 #include <net/route.h> 52 #include <net/udp.h> 53 #include <net/tcp.h> 54 #include <net/sock.h> 55 #include <net/pkt_sched.h> 56 #include <net/fib_rules.h> 57 #include <net/rtnetlink.h> 58 #include <net/net_namespace.h> 59 60 struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 rtnl_calcit_func calcit; 64 }; 65 66 static DEFINE_MUTEX(rtnl_mutex); 67 68 void rtnl_lock(void) 69 { 70 mutex_lock(&rtnl_mutex); 71 } 72 EXPORT_SYMBOL(rtnl_lock); 73 74 void __rtnl_unlock(void) 75 { 76 mutex_unlock(&rtnl_mutex); 77 } 78 79 void rtnl_unlock(void) 80 { 81 /* This fellow will unlock it for us. */ 82 netdev_run_todo(); 83 } 84 EXPORT_SYMBOL(rtnl_unlock); 85 86 int rtnl_trylock(void) 87 { 88 return mutex_trylock(&rtnl_mutex); 89 } 90 EXPORT_SYMBOL(rtnl_trylock); 91 92 int rtnl_is_locked(void) 93 { 94 return mutex_is_locked(&rtnl_mutex); 95 } 96 EXPORT_SYMBOL(rtnl_is_locked); 97 98 #ifdef CONFIG_PROVE_LOCKING 99 bool lockdep_rtnl_is_held(void) 100 { 101 return lockdep_is_held(&rtnl_mutex); 102 } 103 EXPORT_SYMBOL(lockdep_rtnl_is_held); 104 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 105 106 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 107 108 static inline int rtm_msgindex(int msgtype) 109 { 110 int msgindex = msgtype - RTM_BASE; 111 112 /* 113 * msgindex < 0 implies someone tried to register a netlink 114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 115 * the message type has not been added to linux/rtnetlink.h 116 */ 117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 118 119 return msgindex; 120 } 121 122 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 123 { 124 struct rtnl_link *tab; 125 126 if (protocol <= RTNL_FAMILY_MAX) 127 tab = rtnl_msg_handlers[protocol]; 128 else 129 tab = NULL; 130 131 if (tab == NULL || tab[msgindex].doit == NULL) 132 tab = rtnl_msg_handlers[PF_UNSPEC]; 133 134 return tab[msgindex].doit; 135 } 136 137 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 138 { 139 struct rtnl_link *tab; 140 141 if (protocol <= RTNL_FAMILY_MAX) 142 tab = rtnl_msg_handlers[protocol]; 143 else 144 tab = NULL; 145 146 if (tab == NULL || tab[msgindex].dumpit == NULL) 147 tab = rtnl_msg_handlers[PF_UNSPEC]; 148 149 return tab[msgindex].dumpit; 150 } 151 152 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 153 { 154 struct rtnl_link *tab; 155 156 if (protocol <= RTNL_FAMILY_MAX) 157 tab = rtnl_msg_handlers[protocol]; 158 else 159 tab = NULL; 160 161 if (tab == NULL || tab[msgindex].calcit == NULL) 162 tab = rtnl_msg_handlers[PF_UNSPEC]; 163 164 return tab[msgindex].calcit; 165 } 166 167 /** 168 * __rtnl_register - Register a rtnetlink message type 169 * @protocol: Protocol family or PF_UNSPEC 170 * @msgtype: rtnetlink message type 171 * @doit: Function pointer called for each request message 172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 173 * @calcit: Function pointer to calc size of dump message 174 * 175 * Registers the specified function pointers (at least one of them has 176 * to be non-NULL) to be called whenever a request message for the 177 * specified protocol family and message type is received. 178 * 179 * The special protocol family PF_UNSPEC may be used to define fallback 180 * function pointers for the case when no entry for the specific protocol 181 * family exists. 182 * 183 * Returns 0 on success or a negative error code. 184 */ 185 int __rtnl_register(int protocol, int msgtype, 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 187 rtnl_calcit_func calcit) 188 { 189 struct rtnl_link *tab; 190 int msgindex; 191 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 193 msgindex = rtm_msgindex(msgtype); 194 195 tab = rtnl_msg_handlers[protocol]; 196 if (tab == NULL) { 197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 198 if (tab == NULL) 199 return -ENOBUFS; 200 201 rtnl_msg_handlers[protocol] = tab; 202 } 203 204 if (doit) 205 tab[msgindex].doit = doit; 206 207 if (dumpit) 208 tab[msgindex].dumpit = dumpit; 209 210 if (calcit) 211 tab[msgindex].calcit = calcit; 212 213 return 0; 214 } 215 EXPORT_SYMBOL_GPL(__rtnl_register); 216 217 /** 218 * rtnl_register - Register a rtnetlink message type 219 * 220 * Identical to __rtnl_register() but panics on failure. This is useful 221 * as failure of this function is very unlikely, it can only happen due 222 * to lack of memory when allocating the chain to store all message 223 * handlers for a protocol. Meant for use in init functions where lack 224 * of memory implies no sense in continuing. 225 */ 226 void rtnl_register(int protocol, int msgtype, 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 228 rtnl_calcit_func calcit) 229 { 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 231 panic("Unable to register rtnetlink message handler, " 232 "protocol = %d, message type = %d\n", 233 protocol, msgtype); 234 } 235 EXPORT_SYMBOL_GPL(rtnl_register); 236 237 /** 238 * rtnl_unregister - Unregister a rtnetlink message type 239 * @protocol: Protocol family or PF_UNSPEC 240 * @msgtype: rtnetlink message type 241 * 242 * Returns 0 on success or a negative error code. 243 */ 244 int rtnl_unregister(int protocol, int msgtype) 245 { 246 int msgindex; 247 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 249 msgindex = rtm_msgindex(msgtype); 250 251 if (rtnl_msg_handlers[protocol] == NULL) 252 return -ENOENT; 253 254 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 256 257 return 0; 258 } 259 EXPORT_SYMBOL_GPL(rtnl_unregister); 260 261 /** 262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 263 * @protocol : Protocol family or PF_UNSPEC 264 * 265 * Identical to calling rtnl_unregster() for all registered message types 266 * of a certain protocol family. 267 */ 268 void rtnl_unregister_all(int protocol) 269 { 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 271 272 kfree(rtnl_msg_handlers[protocol]); 273 rtnl_msg_handlers[protocol] = NULL; 274 } 275 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 276 277 static LIST_HEAD(link_ops); 278 279 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 280 { 281 const struct rtnl_link_ops *ops; 282 283 list_for_each_entry(ops, &link_ops, list) { 284 if (!strcmp(ops->kind, kind)) 285 return ops; 286 } 287 return NULL; 288 } 289 290 /** 291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 292 * @ops: struct rtnl_link_ops * to register 293 * 294 * The caller must hold the rtnl_mutex. This function should be used 295 * by drivers that create devices during module initialization. It 296 * must be called before registering the devices. 297 * 298 * Returns 0 on success or a negative error code. 299 */ 300 int __rtnl_link_register(struct rtnl_link_ops *ops) 301 { 302 if (rtnl_link_ops_get(ops->kind)) 303 return -EEXIST; 304 305 /* The check for setup is here because if ops 306 * does not have that filled up, it is not possible 307 * to use the ops for creating device. So do not 308 * fill up dellink as well. That disables rtnl_dellink. 309 */ 310 if (ops->setup && !ops->dellink) 311 ops->dellink = unregister_netdevice_queue; 312 313 list_add_tail(&ops->list, &link_ops); 314 return 0; 315 } 316 EXPORT_SYMBOL_GPL(__rtnl_link_register); 317 318 /** 319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 320 * @ops: struct rtnl_link_ops * to register 321 * 322 * Returns 0 on success or a negative error code. 323 */ 324 int rtnl_link_register(struct rtnl_link_ops *ops) 325 { 326 int err; 327 328 rtnl_lock(); 329 err = __rtnl_link_register(ops); 330 rtnl_unlock(); 331 return err; 332 } 333 EXPORT_SYMBOL_GPL(rtnl_link_register); 334 335 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 336 { 337 struct net_device *dev; 338 LIST_HEAD(list_kill); 339 340 for_each_netdev(net, dev) { 341 if (dev->rtnl_link_ops == ops) 342 ops->dellink(dev, &list_kill); 343 } 344 unregister_netdevice_many(&list_kill); 345 } 346 347 /** 348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 349 * @ops: struct rtnl_link_ops * to unregister 350 * 351 * The caller must hold the rtnl_mutex. 352 */ 353 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 354 { 355 struct net *net; 356 357 for_each_net(net) { 358 __rtnl_kill_links(net, ops); 359 } 360 list_del(&ops->list); 361 } 362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 363 364 /* Return with the rtnl_lock held when there are no network 365 * devices unregistering in any network namespace. 366 */ 367 static void rtnl_lock_unregistering_all(void) 368 { 369 struct net *net; 370 bool unregistering; 371 DEFINE_WAIT_FUNC(wait, woken_wake_function); 372 373 add_wait_queue(&netdev_unregistering_wq, &wait); 374 for (;;) { 375 unregistering = false; 376 rtnl_lock(); 377 for_each_net(net) { 378 if (net->dev_unreg_count > 0) { 379 unregistering = true; 380 break; 381 } 382 } 383 if (!unregistering) 384 break; 385 __rtnl_unlock(); 386 387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 388 } 389 remove_wait_queue(&netdev_unregistering_wq, &wait); 390 } 391 392 /** 393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 394 * @ops: struct rtnl_link_ops * to unregister 395 */ 396 void rtnl_link_unregister(struct rtnl_link_ops *ops) 397 { 398 /* Close the race with cleanup_net() */ 399 mutex_lock(&net_mutex); 400 rtnl_lock_unregistering_all(); 401 __rtnl_link_unregister(ops); 402 rtnl_unlock(); 403 mutex_unlock(&net_mutex); 404 } 405 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 406 407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 408 { 409 struct net_device *master_dev; 410 const struct rtnl_link_ops *ops; 411 412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 413 if (!master_dev) 414 return 0; 415 ops = master_dev->rtnl_link_ops; 416 if (!ops || !ops->get_slave_size) 417 return 0; 418 /* IFLA_INFO_SLAVE_DATA + nested data */ 419 return nla_total_size(sizeof(struct nlattr)) + 420 ops->get_slave_size(master_dev, dev); 421 } 422 423 static size_t rtnl_link_get_size(const struct net_device *dev) 424 { 425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 426 size_t size; 427 428 if (!ops) 429 return 0; 430 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 433 434 if (ops->get_size) 435 /* IFLA_INFO_DATA + nested data */ 436 size += nla_total_size(sizeof(struct nlattr)) + 437 ops->get_size(dev); 438 439 if (ops->get_xstats_size) 440 /* IFLA_INFO_XSTATS */ 441 size += nla_total_size(ops->get_xstats_size(dev)); 442 443 size += rtnl_link_get_slave_info_data_size(dev); 444 445 return size; 446 } 447 448 static LIST_HEAD(rtnl_af_ops); 449 450 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 451 { 452 const struct rtnl_af_ops *ops; 453 454 list_for_each_entry(ops, &rtnl_af_ops, list) { 455 if (ops->family == family) 456 return ops; 457 } 458 459 return NULL; 460 } 461 462 /** 463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 464 * @ops: struct rtnl_af_ops * to register 465 * 466 * Returns 0 on success or a negative error code. 467 */ 468 void rtnl_af_register(struct rtnl_af_ops *ops) 469 { 470 rtnl_lock(); 471 list_add_tail(&ops->list, &rtnl_af_ops); 472 rtnl_unlock(); 473 } 474 EXPORT_SYMBOL_GPL(rtnl_af_register); 475 476 /** 477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 478 * @ops: struct rtnl_af_ops * to unregister 479 * 480 * The caller must hold the rtnl_mutex. 481 */ 482 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 483 { 484 list_del(&ops->list); 485 } 486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 487 488 /** 489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 490 * @ops: struct rtnl_af_ops * to unregister 491 */ 492 void rtnl_af_unregister(struct rtnl_af_ops *ops) 493 { 494 rtnl_lock(); 495 __rtnl_af_unregister(ops); 496 rtnl_unlock(); 497 } 498 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 499 500 static size_t rtnl_link_get_af_size(const struct net_device *dev, 501 u32 ext_filter_mask) 502 { 503 struct rtnl_af_ops *af_ops; 504 size_t size; 505 506 /* IFLA_AF_SPEC */ 507 size = nla_total_size(sizeof(struct nlattr)); 508 509 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 510 if (af_ops->get_link_af_size) { 511 /* AF_* + nested data */ 512 size += nla_total_size(sizeof(struct nlattr)) + 513 af_ops->get_link_af_size(dev, ext_filter_mask); 514 } 515 } 516 517 return size; 518 } 519 520 static bool rtnl_have_link_slave_info(const struct net_device *dev) 521 { 522 struct net_device *master_dev; 523 524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 525 if (master_dev && master_dev->rtnl_link_ops) 526 return true; 527 return false; 528 } 529 530 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 531 const struct net_device *dev) 532 { 533 struct net_device *master_dev; 534 const struct rtnl_link_ops *ops; 535 struct nlattr *slave_data; 536 int err; 537 538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 539 if (!master_dev) 540 return 0; 541 ops = master_dev->rtnl_link_ops; 542 if (!ops) 543 return 0; 544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 545 return -EMSGSIZE; 546 if (ops->fill_slave_info) { 547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 548 if (!slave_data) 549 return -EMSGSIZE; 550 err = ops->fill_slave_info(skb, master_dev, dev); 551 if (err < 0) 552 goto err_cancel_slave_data; 553 nla_nest_end(skb, slave_data); 554 } 555 return 0; 556 557 err_cancel_slave_data: 558 nla_nest_cancel(skb, slave_data); 559 return err; 560 } 561 562 static int rtnl_link_info_fill(struct sk_buff *skb, 563 const struct net_device *dev) 564 { 565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 566 struct nlattr *data; 567 int err; 568 569 if (!ops) 570 return 0; 571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 572 return -EMSGSIZE; 573 if (ops->fill_xstats) { 574 err = ops->fill_xstats(skb, dev); 575 if (err < 0) 576 return err; 577 } 578 if (ops->fill_info) { 579 data = nla_nest_start(skb, IFLA_INFO_DATA); 580 if (data == NULL) 581 return -EMSGSIZE; 582 err = ops->fill_info(skb, dev); 583 if (err < 0) 584 goto err_cancel_data; 585 nla_nest_end(skb, data); 586 } 587 return 0; 588 589 err_cancel_data: 590 nla_nest_cancel(skb, data); 591 return err; 592 } 593 594 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 595 { 596 struct nlattr *linkinfo; 597 int err = -EMSGSIZE; 598 599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 600 if (linkinfo == NULL) 601 goto out; 602 603 err = rtnl_link_info_fill(skb, dev); 604 if (err < 0) 605 goto err_cancel_link; 606 607 err = rtnl_link_slave_info_fill(skb, dev); 608 if (err < 0) 609 goto err_cancel_link; 610 611 nla_nest_end(skb, linkinfo); 612 return 0; 613 614 err_cancel_link: 615 nla_nest_cancel(skb, linkinfo); 616 out: 617 return err; 618 } 619 620 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 621 { 622 struct sock *rtnl = net->rtnl; 623 int err = 0; 624 625 NETLINK_CB(skb).dst_group = group; 626 if (echo) 627 atomic_inc(&skb->users); 628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 629 if (echo) 630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 631 return err; 632 } 633 634 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 635 { 636 struct sock *rtnl = net->rtnl; 637 638 return nlmsg_unicast(rtnl, skb, pid); 639 } 640 EXPORT_SYMBOL(rtnl_unicast); 641 642 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 643 struct nlmsghdr *nlh, gfp_t flags) 644 { 645 struct sock *rtnl = net->rtnl; 646 int report = 0; 647 648 if (nlh) 649 report = nlmsg_report(nlh); 650 651 nlmsg_notify(rtnl, skb, pid, group, report, flags); 652 } 653 EXPORT_SYMBOL(rtnl_notify); 654 655 void rtnl_set_sk_err(struct net *net, u32 group, int error) 656 { 657 struct sock *rtnl = net->rtnl; 658 659 netlink_set_err(rtnl, 0, group, error); 660 } 661 EXPORT_SYMBOL(rtnl_set_sk_err); 662 663 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 664 { 665 struct nlattr *mx; 666 int i, valid = 0; 667 668 mx = nla_nest_start(skb, RTA_METRICS); 669 if (mx == NULL) 670 return -ENOBUFS; 671 672 for (i = 0; i < RTAX_MAX; i++) { 673 if (metrics[i]) { 674 if (i == RTAX_CC_ALGO - 1) { 675 char tmp[TCP_CA_NAME_MAX], *name; 676 677 name = tcp_ca_get_name_by_key(metrics[i], tmp); 678 if (!name) 679 continue; 680 if (nla_put_string(skb, i + 1, name)) 681 goto nla_put_failure; 682 } else if (i == RTAX_FEATURES - 1) { 683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 684 685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 686 if (nla_put_u32(skb, i + 1, user_features)) 687 goto nla_put_failure; 688 } else { 689 if (nla_put_u32(skb, i + 1, metrics[i])) 690 goto nla_put_failure; 691 } 692 valid++; 693 } 694 } 695 696 if (!valid) { 697 nla_nest_cancel(skb, mx); 698 return 0; 699 } 700 701 return nla_nest_end(skb, mx); 702 703 nla_put_failure: 704 nla_nest_cancel(skb, mx); 705 return -EMSGSIZE; 706 } 707 EXPORT_SYMBOL(rtnetlink_put_metrics); 708 709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 710 long expires, u32 error) 711 { 712 struct rta_cacheinfo ci = { 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 714 .rta_used = dst->__use, 715 .rta_clntref = atomic_read(&(dst->__refcnt)), 716 .rta_error = error, 717 .rta_id = id, 718 }; 719 720 if (expires) { 721 unsigned long clock; 722 723 clock = jiffies_to_clock_t(abs(expires)); 724 clock = min_t(unsigned long, clock, INT_MAX); 725 ci.rta_expires = (expires > 0) ? clock : -clock; 726 } 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 728 } 729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 730 731 static void set_operstate(struct net_device *dev, unsigned char transition) 732 { 733 unsigned char operstate = dev->operstate; 734 735 switch (transition) { 736 case IF_OPER_UP: 737 if ((operstate == IF_OPER_DORMANT || 738 operstate == IF_OPER_UNKNOWN) && 739 !netif_dormant(dev)) 740 operstate = IF_OPER_UP; 741 break; 742 743 case IF_OPER_DORMANT: 744 if (operstate == IF_OPER_UP || 745 operstate == IF_OPER_UNKNOWN) 746 operstate = IF_OPER_DORMANT; 747 break; 748 } 749 750 if (dev->operstate != operstate) { 751 write_lock_bh(&dev_base_lock); 752 dev->operstate = operstate; 753 write_unlock_bh(&dev_base_lock); 754 netdev_state_change(dev); 755 } 756 } 757 758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 759 { 760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 762 } 763 764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 765 const struct ifinfomsg *ifm) 766 { 767 unsigned int flags = ifm->ifi_flags; 768 769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 770 if (ifm->ifi_change) 771 flags = (flags & ifm->ifi_change) | 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 773 774 return flags; 775 } 776 777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 778 const struct rtnl_link_stats64 *b) 779 { 780 a->rx_packets = b->rx_packets; 781 a->tx_packets = b->tx_packets; 782 a->rx_bytes = b->rx_bytes; 783 a->tx_bytes = b->tx_bytes; 784 a->rx_errors = b->rx_errors; 785 a->tx_errors = b->tx_errors; 786 a->rx_dropped = b->rx_dropped; 787 a->tx_dropped = b->tx_dropped; 788 789 a->multicast = b->multicast; 790 a->collisions = b->collisions; 791 792 a->rx_length_errors = b->rx_length_errors; 793 a->rx_over_errors = b->rx_over_errors; 794 a->rx_crc_errors = b->rx_crc_errors; 795 a->rx_frame_errors = b->rx_frame_errors; 796 a->rx_fifo_errors = b->rx_fifo_errors; 797 a->rx_missed_errors = b->rx_missed_errors; 798 799 a->tx_aborted_errors = b->tx_aborted_errors; 800 a->tx_carrier_errors = b->tx_carrier_errors; 801 a->tx_fifo_errors = b->tx_fifo_errors; 802 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 803 a->tx_window_errors = b->tx_window_errors; 804 805 a->rx_compressed = b->rx_compressed; 806 a->tx_compressed = b->tx_compressed; 807 808 a->rx_nohandler = b->rx_nohandler; 809 } 810 811 /* All VF info */ 812 static inline int rtnl_vfinfo_size(const struct net_device *dev, 813 u32 ext_filter_mask) 814 { 815 if (dev->dev.parent && dev_is_pci(dev->dev.parent) && 816 (ext_filter_mask & RTEXT_FILTER_VF)) { 817 int num_vfs = dev_num_vf(dev->dev.parent); 818 size_t size = nla_total_size(sizeof(struct nlattr)); 819 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 820 size += num_vfs * 821 (nla_total_size(sizeof(struct ifla_vf_mac)) + 822 nla_total_size(sizeof(struct ifla_vf_vlan)) + 823 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 824 nla_total_size(sizeof(struct ifla_vf_rate)) + 825 nla_total_size(sizeof(struct ifla_vf_link_state)) + 826 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 827 /* IFLA_VF_STATS_RX_PACKETS */ 828 nla_total_size_64bit(sizeof(__u64)) + 829 /* IFLA_VF_STATS_TX_PACKETS */ 830 nla_total_size_64bit(sizeof(__u64)) + 831 /* IFLA_VF_STATS_RX_BYTES */ 832 nla_total_size_64bit(sizeof(__u64)) + 833 /* IFLA_VF_STATS_TX_BYTES */ 834 nla_total_size_64bit(sizeof(__u64)) + 835 /* IFLA_VF_STATS_BROADCAST */ 836 nla_total_size_64bit(sizeof(__u64)) + 837 /* IFLA_VF_STATS_MULTICAST */ 838 nla_total_size_64bit(sizeof(__u64)) + 839 nla_total_size(sizeof(struct ifla_vf_trust))); 840 return size; 841 } else 842 return 0; 843 } 844 845 static size_t rtnl_port_size(const struct net_device *dev, 846 u32 ext_filter_mask) 847 { 848 size_t port_size = nla_total_size(4) /* PORT_VF */ 849 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 850 + nla_total_size(sizeof(struct ifla_port_vsi)) 851 /* PORT_VSI_TYPE */ 852 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 853 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 854 + nla_total_size(1) /* PROT_VDP_REQUEST */ 855 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 856 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 857 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 858 + port_size; 859 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 860 + port_size; 861 862 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 863 !(ext_filter_mask & RTEXT_FILTER_VF)) 864 return 0; 865 if (dev_num_vf(dev->dev.parent)) 866 return port_self_size + vf_ports_size + 867 vf_port_size * dev_num_vf(dev->dev.parent); 868 else 869 return port_self_size; 870 } 871 872 static noinline size_t if_nlmsg_size(const struct net_device *dev, 873 u32 ext_filter_mask) 874 { 875 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 876 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 877 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 878 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 879 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 880 + nla_total_size(sizeof(struct rtnl_link_stats)) 881 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 882 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 883 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 884 + nla_total_size(4) /* IFLA_TXQLEN */ 885 + nla_total_size(4) /* IFLA_WEIGHT */ 886 + nla_total_size(4) /* IFLA_MTU */ 887 + nla_total_size(4) /* IFLA_LINK */ 888 + nla_total_size(4) /* IFLA_MASTER */ 889 + nla_total_size(1) /* IFLA_CARRIER */ 890 + nla_total_size(4) /* IFLA_PROMISCUITY */ 891 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 892 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 893 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */ 894 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */ 895 + nla_total_size(1) /* IFLA_OPERSTATE */ 896 + nla_total_size(1) /* IFLA_LINKMODE */ 897 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 898 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 899 + nla_total_size(ext_filter_mask 900 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 901 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 902 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 903 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 904 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 905 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 906 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 907 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 908 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 909 910 } 911 912 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 913 { 914 struct nlattr *vf_ports; 915 struct nlattr *vf_port; 916 int vf; 917 int err; 918 919 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 920 if (!vf_ports) 921 return -EMSGSIZE; 922 923 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 924 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 925 if (!vf_port) 926 goto nla_put_failure; 927 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 928 goto nla_put_failure; 929 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 930 if (err == -EMSGSIZE) 931 goto nla_put_failure; 932 if (err) { 933 nla_nest_cancel(skb, vf_port); 934 continue; 935 } 936 nla_nest_end(skb, vf_port); 937 } 938 939 nla_nest_end(skb, vf_ports); 940 941 return 0; 942 943 nla_put_failure: 944 nla_nest_cancel(skb, vf_ports); 945 return -EMSGSIZE; 946 } 947 948 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 949 { 950 struct nlattr *port_self; 951 int err; 952 953 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 954 if (!port_self) 955 return -EMSGSIZE; 956 957 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 958 if (err) { 959 nla_nest_cancel(skb, port_self); 960 return (err == -EMSGSIZE) ? err : 0; 961 } 962 963 nla_nest_end(skb, port_self); 964 965 return 0; 966 } 967 968 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 969 u32 ext_filter_mask) 970 { 971 int err; 972 973 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 974 !(ext_filter_mask & RTEXT_FILTER_VF)) 975 return 0; 976 977 err = rtnl_port_self_fill(skb, dev); 978 if (err) 979 return err; 980 981 if (dev_num_vf(dev->dev.parent)) { 982 err = rtnl_vf_ports_fill(skb, dev); 983 if (err) 984 return err; 985 } 986 987 return 0; 988 } 989 990 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 991 { 992 int err; 993 struct netdev_phys_item_id ppid; 994 995 err = dev_get_phys_port_id(dev, &ppid); 996 if (err) { 997 if (err == -EOPNOTSUPP) 998 return 0; 999 return err; 1000 } 1001 1002 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1003 return -EMSGSIZE; 1004 1005 return 0; 1006 } 1007 1008 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1009 { 1010 char name[IFNAMSIZ]; 1011 int err; 1012 1013 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1014 if (err) { 1015 if (err == -EOPNOTSUPP) 1016 return 0; 1017 return err; 1018 } 1019 1020 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 1021 return -EMSGSIZE; 1022 1023 return 0; 1024 } 1025 1026 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1027 { 1028 int err; 1029 struct switchdev_attr attr = { 1030 .orig_dev = dev, 1031 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1032 .flags = SWITCHDEV_F_NO_RECURSE, 1033 }; 1034 1035 err = switchdev_port_attr_get(dev, &attr); 1036 if (err) { 1037 if (err == -EOPNOTSUPP) 1038 return 0; 1039 return err; 1040 } 1041 1042 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1043 attr.u.ppid.id)) 1044 return -EMSGSIZE; 1045 1046 return 0; 1047 } 1048 1049 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1050 struct net_device *dev) 1051 { 1052 struct rtnl_link_stats64 *sp; 1053 struct nlattr *attr; 1054 1055 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1056 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1057 if (!attr) 1058 return -EMSGSIZE; 1059 1060 sp = nla_data(attr); 1061 dev_get_stats(dev, sp); 1062 1063 attr = nla_reserve(skb, IFLA_STATS, 1064 sizeof(struct rtnl_link_stats)); 1065 if (!attr) 1066 return -EMSGSIZE; 1067 1068 copy_rtnl_link_stats(nla_data(attr), sp); 1069 1070 return 0; 1071 } 1072 1073 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1074 struct net_device *dev, 1075 int vfs_num, 1076 struct nlattr *vfinfo) 1077 { 1078 struct ifla_vf_rss_query_en vf_rss_query_en; 1079 struct ifla_vf_link_state vf_linkstate; 1080 struct ifla_vf_spoofchk vf_spoofchk; 1081 struct ifla_vf_tx_rate vf_tx_rate; 1082 struct ifla_vf_stats vf_stats; 1083 struct ifla_vf_trust vf_trust; 1084 struct ifla_vf_vlan vf_vlan; 1085 struct ifla_vf_rate vf_rate; 1086 struct nlattr *vf, *vfstats; 1087 struct ifla_vf_mac vf_mac; 1088 struct ifla_vf_info ivi; 1089 1090 /* Not all SR-IOV capable drivers support the 1091 * spoofcheck and "RSS query enable" query. Preset to 1092 * -1 so the user space tool can detect that the driver 1093 * didn't report anything. 1094 */ 1095 ivi.spoofchk = -1; 1096 ivi.rss_query_en = -1; 1097 ivi.trusted = -1; 1098 memset(ivi.mac, 0, sizeof(ivi.mac)); 1099 /* The default value for VF link state is "auto" 1100 * IFLA_VF_LINK_STATE_AUTO which equals zero 1101 */ 1102 ivi.linkstate = 0; 1103 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1104 return 0; 1105 1106 vf_mac.vf = 1107 vf_vlan.vf = 1108 vf_rate.vf = 1109 vf_tx_rate.vf = 1110 vf_spoofchk.vf = 1111 vf_linkstate.vf = 1112 vf_rss_query_en.vf = 1113 vf_trust.vf = ivi.vf; 1114 1115 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1116 vf_vlan.vlan = ivi.vlan; 1117 vf_vlan.qos = ivi.qos; 1118 vf_tx_rate.rate = ivi.max_tx_rate; 1119 vf_rate.min_tx_rate = ivi.min_tx_rate; 1120 vf_rate.max_tx_rate = ivi.max_tx_rate; 1121 vf_spoofchk.setting = ivi.spoofchk; 1122 vf_linkstate.link_state = ivi.linkstate; 1123 vf_rss_query_en.setting = ivi.rss_query_en; 1124 vf_trust.setting = ivi.trusted; 1125 vf = nla_nest_start(skb, IFLA_VF_INFO); 1126 if (!vf) { 1127 nla_nest_cancel(skb, vfinfo); 1128 return -EMSGSIZE; 1129 } 1130 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1131 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1132 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1133 &vf_rate) || 1134 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1135 &vf_tx_rate) || 1136 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1137 &vf_spoofchk) || 1138 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1139 &vf_linkstate) || 1140 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1141 sizeof(vf_rss_query_en), 1142 &vf_rss_query_en) || 1143 nla_put(skb, IFLA_VF_TRUST, 1144 sizeof(vf_trust), &vf_trust)) 1145 return -EMSGSIZE; 1146 memset(&vf_stats, 0, sizeof(vf_stats)); 1147 if (dev->netdev_ops->ndo_get_vf_stats) 1148 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1149 &vf_stats); 1150 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1151 if (!vfstats) { 1152 nla_nest_cancel(skb, vf); 1153 nla_nest_cancel(skb, vfinfo); 1154 return -EMSGSIZE; 1155 } 1156 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1157 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1158 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1159 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1160 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1161 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1162 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1163 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1164 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1165 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1166 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1167 vf_stats.multicast, IFLA_VF_STATS_PAD)) 1168 return -EMSGSIZE; 1169 nla_nest_end(skb, vfstats); 1170 nla_nest_end(skb, vf); 1171 return 0; 1172 } 1173 1174 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1175 { 1176 struct rtnl_link_ifmap map; 1177 1178 memset(&map, 0, sizeof(map)); 1179 map.mem_start = dev->mem_start; 1180 map.mem_end = dev->mem_end; 1181 map.base_addr = dev->base_addr; 1182 map.irq = dev->irq; 1183 map.dma = dev->dma; 1184 map.port = dev->if_port; 1185 1186 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1187 return -EMSGSIZE; 1188 1189 return 0; 1190 } 1191 1192 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1193 int type, u32 pid, u32 seq, u32 change, 1194 unsigned int flags, u32 ext_filter_mask) 1195 { 1196 struct ifinfomsg *ifm; 1197 struct nlmsghdr *nlh; 1198 struct nlattr *af_spec; 1199 struct rtnl_af_ops *af_ops; 1200 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1201 1202 ASSERT_RTNL(); 1203 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1204 if (nlh == NULL) 1205 return -EMSGSIZE; 1206 1207 ifm = nlmsg_data(nlh); 1208 ifm->ifi_family = AF_UNSPEC; 1209 ifm->__ifi_pad = 0; 1210 ifm->ifi_type = dev->type; 1211 ifm->ifi_index = dev->ifindex; 1212 ifm->ifi_flags = dev_get_flags(dev); 1213 ifm->ifi_change = change; 1214 1215 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1216 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1217 nla_put_u8(skb, IFLA_OPERSTATE, 1218 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1219 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1220 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1221 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1222 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1223 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1224 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1225 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1226 #ifdef CONFIG_RPS 1227 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1228 #endif 1229 (dev->ifindex != dev_get_iflink(dev) && 1230 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1231 (upper_dev && 1232 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1233 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1234 (dev->qdisc && 1235 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1236 (dev->ifalias && 1237 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1238 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1239 atomic_read(&dev->carrier_changes)) || 1240 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1241 goto nla_put_failure; 1242 1243 if (rtnl_fill_link_ifmap(skb, dev)) 1244 goto nla_put_failure; 1245 1246 if (dev->addr_len) { 1247 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1248 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1249 goto nla_put_failure; 1250 } 1251 1252 if (rtnl_phys_port_id_fill(skb, dev)) 1253 goto nla_put_failure; 1254 1255 if (rtnl_phys_port_name_fill(skb, dev)) 1256 goto nla_put_failure; 1257 1258 if (rtnl_phys_switch_id_fill(skb, dev)) 1259 goto nla_put_failure; 1260 1261 if (rtnl_fill_stats(skb, dev)) 1262 goto nla_put_failure; 1263 1264 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1265 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1266 goto nla_put_failure; 1267 1268 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1269 ext_filter_mask & RTEXT_FILTER_VF) { 1270 int i; 1271 struct nlattr *vfinfo; 1272 int num_vfs = dev_num_vf(dev->dev.parent); 1273 1274 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1275 if (!vfinfo) 1276 goto nla_put_failure; 1277 for (i = 0; i < num_vfs; i++) { 1278 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1279 goto nla_put_failure; 1280 } 1281 1282 nla_nest_end(skb, vfinfo); 1283 } 1284 1285 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1286 goto nla_put_failure; 1287 1288 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1289 if (rtnl_link_fill(skb, dev) < 0) 1290 goto nla_put_failure; 1291 } 1292 1293 if (dev->rtnl_link_ops && 1294 dev->rtnl_link_ops->get_link_net) { 1295 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1296 1297 if (!net_eq(dev_net(dev), link_net)) { 1298 int id = peernet2id_alloc(dev_net(dev), link_net); 1299 1300 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1301 goto nla_put_failure; 1302 } 1303 } 1304 1305 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1306 goto nla_put_failure; 1307 1308 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1309 if (af_ops->fill_link_af) { 1310 struct nlattr *af; 1311 int err; 1312 1313 if (!(af = nla_nest_start(skb, af_ops->family))) 1314 goto nla_put_failure; 1315 1316 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1317 1318 /* 1319 * Caller may return ENODATA to indicate that there 1320 * was no data to be dumped. This is not an error, it 1321 * means we should trim the attribute header and 1322 * continue. 1323 */ 1324 if (err == -ENODATA) 1325 nla_nest_cancel(skb, af); 1326 else if (err < 0) 1327 goto nla_put_failure; 1328 1329 nla_nest_end(skb, af); 1330 } 1331 } 1332 1333 nla_nest_end(skb, af_spec); 1334 1335 nlmsg_end(skb, nlh); 1336 return 0; 1337 1338 nla_put_failure: 1339 nlmsg_cancel(skb, nlh); 1340 return -EMSGSIZE; 1341 } 1342 1343 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1344 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1345 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1346 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1347 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1348 [IFLA_MTU] = { .type = NLA_U32 }, 1349 [IFLA_LINK] = { .type = NLA_U32 }, 1350 [IFLA_MASTER] = { .type = NLA_U32 }, 1351 [IFLA_CARRIER] = { .type = NLA_U8 }, 1352 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1353 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1354 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1355 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1356 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1357 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1358 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1359 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1360 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1361 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1362 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1363 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1364 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1365 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1366 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1367 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1368 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1369 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1370 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1371 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1372 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1373 }; 1374 1375 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1376 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1377 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1378 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1379 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1380 }; 1381 1382 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1383 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1384 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1385 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1386 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1387 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1388 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1389 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1390 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1391 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1392 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1393 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1394 }; 1395 1396 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1397 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1398 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1399 .len = PORT_PROFILE_MAX }, 1400 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1401 .len = sizeof(struct ifla_port_vsi)}, 1402 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1403 .len = PORT_UUID_MAX }, 1404 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1405 .len = PORT_UUID_MAX }, 1406 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1407 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1408 }; 1409 1410 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1411 { 1412 const struct rtnl_link_ops *ops = NULL; 1413 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1414 1415 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0) 1416 return NULL; 1417 1418 if (linfo[IFLA_INFO_KIND]) { 1419 char kind[MODULE_NAME_LEN]; 1420 1421 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1422 ops = rtnl_link_ops_get(kind); 1423 } 1424 1425 return ops; 1426 } 1427 1428 static bool link_master_filtered(struct net_device *dev, int master_idx) 1429 { 1430 struct net_device *master; 1431 1432 if (!master_idx) 1433 return false; 1434 1435 master = netdev_master_upper_dev_get(dev); 1436 if (!master || master->ifindex != master_idx) 1437 return true; 1438 1439 return false; 1440 } 1441 1442 static bool link_kind_filtered(const struct net_device *dev, 1443 const struct rtnl_link_ops *kind_ops) 1444 { 1445 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1446 return true; 1447 1448 return false; 1449 } 1450 1451 static bool link_dump_filtered(struct net_device *dev, 1452 int master_idx, 1453 const struct rtnl_link_ops *kind_ops) 1454 { 1455 if (link_master_filtered(dev, master_idx) || 1456 link_kind_filtered(dev, kind_ops)) 1457 return true; 1458 1459 return false; 1460 } 1461 1462 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1463 { 1464 struct net *net = sock_net(skb->sk); 1465 int h, s_h; 1466 int idx = 0, s_idx; 1467 struct net_device *dev; 1468 struct hlist_head *head; 1469 struct nlattr *tb[IFLA_MAX+1]; 1470 u32 ext_filter_mask = 0; 1471 const struct rtnl_link_ops *kind_ops = NULL; 1472 unsigned int flags = NLM_F_MULTI; 1473 int master_idx = 0; 1474 int err; 1475 int hdrlen; 1476 1477 s_h = cb->args[0]; 1478 s_idx = cb->args[1]; 1479 1480 cb->seq = net->dev_base_seq; 1481 1482 /* A hack to preserve kernel<->userspace interface. 1483 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1484 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1485 * what iproute2 < v3.9.0 used. 1486 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1487 * attribute, its netlink message is shorter than struct ifinfomsg. 1488 */ 1489 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1490 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1491 1492 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1493 1494 if (tb[IFLA_EXT_MASK]) 1495 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1496 1497 if (tb[IFLA_MASTER]) 1498 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1499 1500 if (tb[IFLA_LINKINFO]) 1501 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1502 1503 if (master_idx || kind_ops) 1504 flags |= NLM_F_DUMP_FILTERED; 1505 } 1506 1507 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1508 idx = 0; 1509 head = &net->dev_index_head[h]; 1510 hlist_for_each_entry(dev, head, index_hlist) { 1511 if (link_dump_filtered(dev, master_idx, kind_ops)) 1512 continue; 1513 if (idx < s_idx) 1514 goto cont; 1515 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1516 NETLINK_CB(cb->skb).portid, 1517 cb->nlh->nlmsg_seq, 0, 1518 flags, 1519 ext_filter_mask); 1520 /* If we ran out of room on the first message, 1521 * we're in trouble 1522 */ 1523 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1524 1525 if (err < 0) 1526 goto out; 1527 1528 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1529 cont: 1530 idx++; 1531 } 1532 } 1533 out: 1534 cb->args[1] = idx; 1535 cb->args[0] = h; 1536 1537 return skb->len; 1538 } 1539 1540 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1541 { 1542 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1543 } 1544 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1545 1546 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1547 { 1548 struct net *net; 1549 /* Examine the link attributes and figure out which 1550 * network namespace we are talking about. 1551 */ 1552 if (tb[IFLA_NET_NS_PID]) 1553 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1554 else if (tb[IFLA_NET_NS_FD]) 1555 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1556 else 1557 net = get_net(src_net); 1558 return net; 1559 } 1560 EXPORT_SYMBOL(rtnl_link_get_net); 1561 1562 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1563 { 1564 if (dev) { 1565 if (tb[IFLA_ADDRESS] && 1566 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1567 return -EINVAL; 1568 1569 if (tb[IFLA_BROADCAST] && 1570 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1571 return -EINVAL; 1572 } 1573 1574 if (tb[IFLA_AF_SPEC]) { 1575 struct nlattr *af; 1576 int rem, err; 1577 1578 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1579 const struct rtnl_af_ops *af_ops; 1580 1581 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1582 return -EAFNOSUPPORT; 1583 1584 if (!af_ops->set_link_af) 1585 return -EOPNOTSUPP; 1586 1587 if (af_ops->validate_link_af) { 1588 err = af_ops->validate_link_af(dev, af); 1589 if (err < 0) 1590 return err; 1591 } 1592 } 1593 } 1594 1595 return 0; 1596 } 1597 1598 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1599 int guid_type) 1600 { 1601 const struct net_device_ops *ops = dev->netdev_ops; 1602 1603 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1604 } 1605 1606 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1607 { 1608 if (dev->type != ARPHRD_INFINIBAND) 1609 return -EOPNOTSUPP; 1610 1611 return handle_infiniband_guid(dev, ivt, guid_type); 1612 } 1613 1614 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1615 { 1616 const struct net_device_ops *ops = dev->netdev_ops; 1617 int err = -EINVAL; 1618 1619 if (tb[IFLA_VF_MAC]) { 1620 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1621 1622 err = -EOPNOTSUPP; 1623 if (ops->ndo_set_vf_mac) 1624 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1625 ivm->mac); 1626 if (err < 0) 1627 return err; 1628 } 1629 1630 if (tb[IFLA_VF_VLAN]) { 1631 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1632 1633 err = -EOPNOTSUPP; 1634 if (ops->ndo_set_vf_vlan) 1635 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1636 ivv->qos); 1637 if (err < 0) 1638 return err; 1639 } 1640 1641 if (tb[IFLA_VF_TX_RATE]) { 1642 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1643 struct ifla_vf_info ivf; 1644 1645 err = -EOPNOTSUPP; 1646 if (ops->ndo_get_vf_config) 1647 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1648 if (err < 0) 1649 return err; 1650 1651 err = -EOPNOTSUPP; 1652 if (ops->ndo_set_vf_rate) 1653 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1654 ivf.min_tx_rate, 1655 ivt->rate); 1656 if (err < 0) 1657 return err; 1658 } 1659 1660 if (tb[IFLA_VF_RATE]) { 1661 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1662 1663 err = -EOPNOTSUPP; 1664 if (ops->ndo_set_vf_rate) 1665 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1666 ivt->min_tx_rate, 1667 ivt->max_tx_rate); 1668 if (err < 0) 1669 return err; 1670 } 1671 1672 if (tb[IFLA_VF_SPOOFCHK]) { 1673 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1674 1675 err = -EOPNOTSUPP; 1676 if (ops->ndo_set_vf_spoofchk) 1677 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1678 ivs->setting); 1679 if (err < 0) 1680 return err; 1681 } 1682 1683 if (tb[IFLA_VF_LINK_STATE]) { 1684 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1685 1686 err = -EOPNOTSUPP; 1687 if (ops->ndo_set_vf_link_state) 1688 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1689 ivl->link_state); 1690 if (err < 0) 1691 return err; 1692 } 1693 1694 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1695 struct ifla_vf_rss_query_en *ivrssq_en; 1696 1697 err = -EOPNOTSUPP; 1698 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1699 if (ops->ndo_set_vf_rss_query_en) 1700 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1701 ivrssq_en->setting); 1702 if (err < 0) 1703 return err; 1704 } 1705 1706 if (tb[IFLA_VF_TRUST]) { 1707 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1708 1709 err = -EOPNOTSUPP; 1710 if (ops->ndo_set_vf_trust) 1711 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1712 if (err < 0) 1713 return err; 1714 } 1715 1716 if (tb[IFLA_VF_IB_NODE_GUID]) { 1717 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1718 1719 if (!ops->ndo_set_vf_guid) 1720 return -EOPNOTSUPP; 1721 1722 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1723 } 1724 1725 if (tb[IFLA_VF_IB_PORT_GUID]) { 1726 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1727 1728 if (!ops->ndo_set_vf_guid) 1729 return -EOPNOTSUPP; 1730 1731 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1732 } 1733 1734 return err; 1735 } 1736 1737 static int do_set_master(struct net_device *dev, int ifindex) 1738 { 1739 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1740 const struct net_device_ops *ops; 1741 int err; 1742 1743 if (upper_dev) { 1744 if (upper_dev->ifindex == ifindex) 1745 return 0; 1746 ops = upper_dev->netdev_ops; 1747 if (ops->ndo_del_slave) { 1748 err = ops->ndo_del_slave(upper_dev, dev); 1749 if (err) 1750 return err; 1751 } else { 1752 return -EOPNOTSUPP; 1753 } 1754 } 1755 1756 if (ifindex) { 1757 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1758 if (!upper_dev) 1759 return -EINVAL; 1760 ops = upper_dev->netdev_ops; 1761 if (ops->ndo_add_slave) { 1762 err = ops->ndo_add_slave(upper_dev, dev); 1763 if (err) 1764 return err; 1765 } else { 1766 return -EOPNOTSUPP; 1767 } 1768 } 1769 return 0; 1770 } 1771 1772 #define DO_SETLINK_MODIFIED 0x01 1773 /* notify flag means notify + modified. */ 1774 #define DO_SETLINK_NOTIFY 0x03 1775 static int do_setlink(const struct sk_buff *skb, 1776 struct net_device *dev, struct ifinfomsg *ifm, 1777 struct nlattr **tb, char *ifname, int status) 1778 { 1779 const struct net_device_ops *ops = dev->netdev_ops; 1780 int err; 1781 1782 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1783 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1784 if (IS_ERR(net)) { 1785 err = PTR_ERR(net); 1786 goto errout; 1787 } 1788 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1789 put_net(net); 1790 err = -EPERM; 1791 goto errout; 1792 } 1793 err = dev_change_net_namespace(dev, net, ifname); 1794 put_net(net); 1795 if (err) 1796 goto errout; 1797 status |= DO_SETLINK_MODIFIED; 1798 } 1799 1800 if (tb[IFLA_MAP]) { 1801 struct rtnl_link_ifmap *u_map; 1802 struct ifmap k_map; 1803 1804 if (!ops->ndo_set_config) { 1805 err = -EOPNOTSUPP; 1806 goto errout; 1807 } 1808 1809 if (!netif_device_present(dev)) { 1810 err = -ENODEV; 1811 goto errout; 1812 } 1813 1814 u_map = nla_data(tb[IFLA_MAP]); 1815 k_map.mem_start = (unsigned long) u_map->mem_start; 1816 k_map.mem_end = (unsigned long) u_map->mem_end; 1817 k_map.base_addr = (unsigned short) u_map->base_addr; 1818 k_map.irq = (unsigned char) u_map->irq; 1819 k_map.dma = (unsigned char) u_map->dma; 1820 k_map.port = (unsigned char) u_map->port; 1821 1822 err = ops->ndo_set_config(dev, &k_map); 1823 if (err < 0) 1824 goto errout; 1825 1826 status |= DO_SETLINK_NOTIFY; 1827 } 1828 1829 if (tb[IFLA_ADDRESS]) { 1830 struct sockaddr *sa; 1831 int len; 1832 1833 len = sizeof(sa_family_t) + dev->addr_len; 1834 sa = kmalloc(len, GFP_KERNEL); 1835 if (!sa) { 1836 err = -ENOMEM; 1837 goto errout; 1838 } 1839 sa->sa_family = dev->type; 1840 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1841 dev->addr_len); 1842 err = dev_set_mac_address(dev, sa); 1843 kfree(sa); 1844 if (err) 1845 goto errout; 1846 status |= DO_SETLINK_MODIFIED; 1847 } 1848 1849 if (tb[IFLA_MTU]) { 1850 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1851 if (err < 0) 1852 goto errout; 1853 status |= DO_SETLINK_MODIFIED; 1854 } 1855 1856 if (tb[IFLA_GROUP]) { 1857 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1858 status |= DO_SETLINK_NOTIFY; 1859 } 1860 1861 /* 1862 * Interface selected by interface index but interface 1863 * name provided implies that a name change has been 1864 * requested. 1865 */ 1866 if (ifm->ifi_index > 0 && ifname[0]) { 1867 err = dev_change_name(dev, ifname); 1868 if (err < 0) 1869 goto errout; 1870 status |= DO_SETLINK_MODIFIED; 1871 } 1872 1873 if (tb[IFLA_IFALIAS]) { 1874 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1875 nla_len(tb[IFLA_IFALIAS])); 1876 if (err < 0) 1877 goto errout; 1878 status |= DO_SETLINK_NOTIFY; 1879 } 1880 1881 if (tb[IFLA_BROADCAST]) { 1882 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1883 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1884 } 1885 1886 if (ifm->ifi_flags || ifm->ifi_change) { 1887 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1888 if (err < 0) 1889 goto errout; 1890 } 1891 1892 if (tb[IFLA_MASTER]) { 1893 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1894 if (err) 1895 goto errout; 1896 status |= DO_SETLINK_MODIFIED; 1897 } 1898 1899 if (tb[IFLA_CARRIER]) { 1900 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 1901 if (err) 1902 goto errout; 1903 status |= DO_SETLINK_MODIFIED; 1904 } 1905 1906 if (tb[IFLA_TXQLEN]) { 1907 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 1908 1909 if (dev->tx_queue_len ^ value) 1910 status |= DO_SETLINK_NOTIFY; 1911 1912 dev->tx_queue_len = value; 1913 } 1914 1915 if (tb[IFLA_OPERSTATE]) 1916 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1917 1918 if (tb[IFLA_LINKMODE]) { 1919 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 1920 1921 write_lock_bh(&dev_base_lock); 1922 if (dev->link_mode ^ value) 1923 status |= DO_SETLINK_NOTIFY; 1924 dev->link_mode = value; 1925 write_unlock_bh(&dev_base_lock); 1926 } 1927 1928 if (tb[IFLA_VFINFO_LIST]) { 1929 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 1930 struct nlattr *attr; 1931 int rem; 1932 1933 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1934 if (nla_type(attr) != IFLA_VF_INFO || 1935 nla_len(attr) < NLA_HDRLEN) { 1936 err = -EINVAL; 1937 goto errout; 1938 } 1939 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 1940 ifla_vf_policy); 1941 if (err < 0) 1942 goto errout; 1943 err = do_setvfinfo(dev, vfinfo); 1944 if (err < 0) 1945 goto errout; 1946 status |= DO_SETLINK_NOTIFY; 1947 } 1948 } 1949 err = 0; 1950 1951 if (tb[IFLA_VF_PORTS]) { 1952 struct nlattr *port[IFLA_PORT_MAX+1]; 1953 struct nlattr *attr; 1954 int vf; 1955 int rem; 1956 1957 err = -EOPNOTSUPP; 1958 if (!ops->ndo_set_vf_port) 1959 goto errout; 1960 1961 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1962 if (nla_type(attr) != IFLA_VF_PORT || 1963 nla_len(attr) < NLA_HDRLEN) { 1964 err = -EINVAL; 1965 goto errout; 1966 } 1967 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 1968 ifla_port_policy); 1969 if (err < 0) 1970 goto errout; 1971 if (!port[IFLA_PORT_VF]) { 1972 err = -EOPNOTSUPP; 1973 goto errout; 1974 } 1975 vf = nla_get_u32(port[IFLA_PORT_VF]); 1976 err = ops->ndo_set_vf_port(dev, vf, port); 1977 if (err < 0) 1978 goto errout; 1979 status |= DO_SETLINK_NOTIFY; 1980 } 1981 } 1982 err = 0; 1983 1984 if (tb[IFLA_PORT_SELF]) { 1985 struct nlattr *port[IFLA_PORT_MAX+1]; 1986 1987 err = nla_parse_nested(port, IFLA_PORT_MAX, 1988 tb[IFLA_PORT_SELF], ifla_port_policy); 1989 if (err < 0) 1990 goto errout; 1991 1992 err = -EOPNOTSUPP; 1993 if (ops->ndo_set_vf_port) 1994 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1995 if (err < 0) 1996 goto errout; 1997 status |= DO_SETLINK_NOTIFY; 1998 } 1999 2000 if (tb[IFLA_AF_SPEC]) { 2001 struct nlattr *af; 2002 int rem; 2003 2004 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2005 const struct rtnl_af_ops *af_ops; 2006 2007 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2008 BUG(); 2009 2010 err = af_ops->set_link_af(dev, af); 2011 if (err < 0) 2012 goto errout; 2013 2014 status |= DO_SETLINK_NOTIFY; 2015 } 2016 } 2017 err = 0; 2018 2019 if (tb[IFLA_PROTO_DOWN]) { 2020 err = dev_change_proto_down(dev, 2021 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2022 if (err) 2023 goto errout; 2024 status |= DO_SETLINK_NOTIFY; 2025 } 2026 2027 errout: 2028 if (status & DO_SETLINK_MODIFIED) { 2029 if (status & DO_SETLINK_NOTIFY) 2030 netdev_state_change(dev); 2031 2032 if (err < 0) 2033 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", 2034 dev->name); 2035 } 2036 2037 return err; 2038 } 2039 2040 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2041 { 2042 struct net *net = sock_net(skb->sk); 2043 struct ifinfomsg *ifm; 2044 struct net_device *dev; 2045 int err; 2046 struct nlattr *tb[IFLA_MAX+1]; 2047 char ifname[IFNAMSIZ]; 2048 2049 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2050 if (err < 0) 2051 goto errout; 2052 2053 if (tb[IFLA_IFNAME]) 2054 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2055 else 2056 ifname[0] = '\0'; 2057 2058 err = -EINVAL; 2059 ifm = nlmsg_data(nlh); 2060 if (ifm->ifi_index > 0) 2061 dev = __dev_get_by_index(net, ifm->ifi_index); 2062 else if (tb[IFLA_IFNAME]) 2063 dev = __dev_get_by_name(net, ifname); 2064 else 2065 goto errout; 2066 2067 if (dev == NULL) { 2068 err = -ENODEV; 2069 goto errout; 2070 } 2071 2072 err = validate_linkmsg(dev, tb); 2073 if (err < 0) 2074 goto errout; 2075 2076 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 2077 errout: 2078 return err; 2079 } 2080 2081 static int rtnl_group_dellink(const struct net *net, int group) 2082 { 2083 struct net_device *dev, *aux; 2084 LIST_HEAD(list_kill); 2085 bool found = false; 2086 2087 if (!group) 2088 return -EPERM; 2089 2090 for_each_netdev(net, dev) { 2091 if (dev->group == group) { 2092 const struct rtnl_link_ops *ops; 2093 2094 found = true; 2095 ops = dev->rtnl_link_ops; 2096 if (!ops || !ops->dellink) 2097 return -EOPNOTSUPP; 2098 } 2099 } 2100 2101 if (!found) 2102 return -ENODEV; 2103 2104 for_each_netdev_safe(net, dev, aux) { 2105 if (dev->group == group) { 2106 const struct rtnl_link_ops *ops; 2107 2108 ops = dev->rtnl_link_ops; 2109 ops->dellink(dev, &list_kill); 2110 } 2111 } 2112 unregister_netdevice_many(&list_kill); 2113 2114 return 0; 2115 } 2116 2117 int rtnl_delete_link(struct net_device *dev) 2118 { 2119 const struct rtnl_link_ops *ops; 2120 LIST_HEAD(list_kill); 2121 2122 ops = dev->rtnl_link_ops; 2123 if (!ops || !ops->dellink) 2124 return -EOPNOTSUPP; 2125 2126 ops->dellink(dev, &list_kill); 2127 unregister_netdevice_many(&list_kill); 2128 2129 return 0; 2130 } 2131 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2132 2133 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2134 { 2135 struct net *net = sock_net(skb->sk); 2136 struct net_device *dev; 2137 struct ifinfomsg *ifm; 2138 char ifname[IFNAMSIZ]; 2139 struct nlattr *tb[IFLA_MAX+1]; 2140 int err; 2141 2142 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2143 if (err < 0) 2144 return err; 2145 2146 if (tb[IFLA_IFNAME]) 2147 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2148 2149 ifm = nlmsg_data(nlh); 2150 if (ifm->ifi_index > 0) 2151 dev = __dev_get_by_index(net, ifm->ifi_index); 2152 else if (tb[IFLA_IFNAME]) 2153 dev = __dev_get_by_name(net, ifname); 2154 else if (tb[IFLA_GROUP]) 2155 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2156 else 2157 return -EINVAL; 2158 2159 if (!dev) 2160 return -ENODEV; 2161 2162 return rtnl_delete_link(dev); 2163 } 2164 2165 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2166 { 2167 unsigned int old_flags; 2168 int err; 2169 2170 old_flags = dev->flags; 2171 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2172 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2173 if (err < 0) 2174 return err; 2175 } 2176 2177 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2178 2179 __dev_notify_flags(dev, old_flags, ~0U); 2180 return 0; 2181 } 2182 EXPORT_SYMBOL(rtnl_configure_link); 2183 2184 struct net_device *rtnl_create_link(struct net *net, 2185 const char *ifname, unsigned char name_assign_type, 2186 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2187 { 2188 int err; 2189 struct net_device *dev; 2190 unsigned int num_tx_queues = 1; 2191 unsigned int num_rx_queues = 1; 2192 2193 if (tb[IFLA_NUM_TX_QUEUES]) 2194 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2195 else if (ops->get_num_tx_queues) 2196 num_tx_queues = ops->get_num_tx_queues(); 2197 2198 if (tb[IFLA_NUM_RX_QUEUES]) 2199 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2200 else if (ops->get_num_rx_queues) 2201 num_rx_queues = ops->get_num_rx_queues(); 2202 2203 err = -ENOMEM; 2204 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2205 ops->setup, num_tx_queues, num_rx_queues); 2206 if (!dev) 2207 goto err; 2208 2209 dev_net_set(dev, net); 2210 dev->rtnl_link_ops = ops; 2211 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2212 2213 if (tb[IFLA_MTU]) 2214 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2215 if (tb[IFLA_ADDRESS]) { 2216 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2217 nla_len(tb[IFLA_ADDRESS])); 2218 dev->addr_assign_type = NET_ADDR_SET; 2219 } 2220 if (tb[IFLA_BROADCAST]) 2221 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2222 nla_len(tb[IFLA_BROADCAST])); 2223 if (tb[IFLA_TXQLEN]) 2224 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2225 if (tb[IFLA_OPERSTATE]) 2226 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2227 if (tb[IFLA_LINKMODE]) 2228 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2229 if (tb[IFLA_GROUP]) 2230 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2231 2232 return dev; 2233 2234 err: 2235 return ERR_PTR(err); 2236 } 2237 EXPORT_SYMBOL(rtnl_create_link); 2238 2239 static int rtnl_group_changelink(const struct sk_buff *skb, 2240 struct net *net, int group, 2241 struct ifinfomsg *ifm, 2242 struct nlattr **tb) 2243 { 2244 struct net_device *dev, *aux; 2245 int err; 2246 2247 for_each_netdev_safe(net, dev, aux) { 2248 if (dev->group == group) { 2249 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2250 if (err < 0) 2251 return err; 2252 } 2253 } 2254 2255 return 0; 2256 } 2257 2258 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2259 { 2260 struct net *net = sock_net(skb->sk); 2261 const struct rtnl_link_ops *ops; 2262 const struct rtnl_link_ops *m_ops = NULL; 2263 struct net_device *dev; 2264 struct net_device *master_dev = NULL; 2265 struct ifinfomsg *ifm; 2266 char kind[MODULE_NAME_LEN]; 2267 char ifname[IFNAMSIZ]; 2268 struct nlattr *tb[IFLA_MAX+1]; 2269 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2270 unsigned char name_assign_type = NET_NAME_USER; 2271 int err; 2272 2273 #ifdef CONFIG_MODULES 2274 replay: 2275 #endif 2276 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2277 if (err < 0) 2278 return err; 2279 2280 if (tb[IFLA_IFNAME]) 2281 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2282 else 2283 ifname[0] = '\0'; 2284 2285 ifm = nlmsg_data(nlh); 2286 if (ifm->ifi_index > 0) 2287 dev = __dev_get_by_index(net, ifm->ifi_index); 2288 else { 2289 if (ifname[0]) 2290 dev = __dev_get_by_name(net, ifname); 2291 else 2292 dev = NULL; 2293 } 2294 2295 if (dev) { 2296 master_dev = netdev_master_upper_dev_get(dev); 2297 if (master_dev) 2298 m_ops = master_dev->rtnl_link_ops; 2299 } 2300 2301 err = validate_linkmsg(dev, tb); 2302 if (err < 0) 2303 return err; 2304 2305 if (tb[IFLA_LINKINFO]) { 2306 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2307 tb[IFLA_LINKINFO], ifla_info_policy); 2308 if (err < 0) 2309 return err; 2310 } else 2311 memset(linkinfo, 0, sizeof(linkinfo)); 2312 2313 if (linkinfo[IFLA_INFO_KIND]) { 2314 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2315 ops = rtnl_link_ops_get(kind); 2316 } else { 2317 kind[0] = '\0'; 2318 ops = NULL; 2319 } 2320 2321 if (1) { 2322 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2323 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2324 struct nlattr **data = NULL; 2325 struct nlattr **slave_data = NULL; 2326 struct net *dest_net, *link_net = NULL; 2327 2328 if (ops) { 2329 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2330 err = nla_parse_nested(attr, ops->maxtype, 2331 linkinfo[IFLA_INFO_DATA], 2332 ops->policy); 2333 if (err < 0) 2334 return err; 2335 data = attr; 2336 } 2337 if (ops->validate) { 2338 err = ops->validate(tb, data); 2339 if (err < 0) 2340 return err; 2341 } 2342 } 2343 2344 if (m_ops) { 2345 if (m_ops->slave_maxtype && 2346 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2347 err = nla_parse_nested(slave_attr, 2348 m_ops->slave_maxtype, 2349 linkinfo[IFLA_INFO_SLAVE_DATA], 2350 m_ops->slave_policy); 2351 if (err < 0) 2352 return err; 2353 slave_data = slave_attr; 2354 } 2355 if (m_ops->slave_validate) { 2356 err = m_ops->slave_validate(tb, slave_data); 2357 if (err < 0) 2358 return err; 2359 } 2360 } 2361 2362 if (dev) { 2363 int status = 0; 2364 2365 if (nlh->nlmsg_flags & NLM_F_EXCL) 2366 return -EEXIST; 2367 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2368 return -EOPNOTSUPP; 2369 2370 if (linkinfo[IFLA_INFO_DATA]) { 2371 if (!ops || ops != dev->rtnl_link_ops || 2372 !ops->changelink) 2373 return -EOPNOTSUPP; 2374 2375 err = ops->changelink(dev, tb, data); 2376 if (err < 0) 2377 return err; 2378 status |= DO_SETLINK_NOTIFY; 2379 } 2380 2381 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2382 if (!m_ops || !m_ops->slave_changelink) 2383 return -EOPNOTSUPP; 2384 2385 err = m_ops->slave_changelink(master_dev, dev, 2386 tb, slave_data); 2387 if (err < 0) 2388 return err; 2389 status |= DO_SETLINK_NOTIFY; 2390 } 2391 2392 return do_setlink(skb, dev, ifm, tb, ifname, status); 2393 } 2394 2395 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2396 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2397 return rtnl_group_changelink(skb, net, 2398 nla_get_u32(tb[IFLA_GROUP]), 2399 ifm, tb); 2400 return -ENODEV; 2401 } 2402 2403 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2404 return -EOPNOTSUPP; 2405 2406 if (!ops) { 2407 #ifdef CONFIG_MODULES 2408 if (kind[0]) { 2409 __rtnl_unlock(); 2410 request_module("rtnl-link-%s", kind); 2411 rtnl_lock(); 2412 ops = rtnl_link_ops_get(kind); 2413 if (ops) 2414 goto replay; 2415 } 2416 #endif 2417 return -EOPNOTSUPP; 2418 } 2419 2420 if (!ops->setup) 2421 return -EOPNOTSUPP; 2422 2423 if (!ifname[0]) { 2424 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2425 name_assign_type = NET_NAME_ENUM; 2426 } 2427 2428 dest_net = rtnl_link_get_net(net, tb); 2429 if (IS_ERR(dest_net)) 2430 return PTR_ERR(dest_net); 2431 2432 err = -EPERM; 2433 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2434 goto out; 2435 2436 if (tb[IFLA_LINK_NETNSID]) { 2437 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2438 2439 link_net = get_net_ns_by_id(dest_net, id); 2440 if (!link_net) { 2441 err = -EINVAL; 2442 goto out; 2443 } 2444 err = -EPERM; 2445 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2446 goto out; 2447 } 2448 2449 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2450 name_assign_type, ops, tb); 2451 if (IS_ERR(dev)) { 2452 err = PTR_ERR(dev); 2453 goto out; 2454 } 2455 2456 dev->ifindex = ifm->ifi_index; 2457 2458 if (ops->newlink) { 2459 err = ops->newlink(link_net ? : net, dev, tb, data); 2460 /* Drivers should call free_netdev() in ->destructor 2461 * and unregister it on failure after registration 2462 * so that device could be finally freed in rtnl_unlock. 2463 */ 2464 if (err < 0) { 2465 /* If device is not registered at all, free it now */ 2466 if (dev->reg_state == NETREG_UNINITIALIZED) 2467 free_netdev(dev); 2468 goto out; 2469 } 2470 } else { 2471 err = register_netdevice(dev); 2472 if (err < 0) { 2473 free_netdev(dev); 2474 goto out; 2475 } 2476 } 2477 err = rtnl_configure_link(dev, ifm); 2478 if (err < 0) 2479 goto out_unregister; 2480 if (link_net) { 2481 err = dev_change_net_namespace(dev, dest_net, ifname); 2482 if (err < 0) 2483 goto out_unregister; 2484 } 2485 out: 2486 if (link_net) 2487 put_net(link_net); 2488 put_net(dest_net); 2489 return err; 2490 out_unregister: 2491 if (ops->newlink) { 2492 LIST_HEAD(list_kill); 2493 2494 ops->dellink(dev, &list_kill); 2495 unregister_netdevice_many(&list_kill); 2496 } else { 2497 unregister_netdevice(dev); 2498 } 2499 goto out; 2500 } 2501 } 2502 2503 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2504 { 2505 struct net *net = sock_net(skb->sk); 2506 struct ifinfomsg *ifm; 2507 char ifname[IFNAMSIZ]; 2508 struct nlattr *tb[IFLA_MAX+1]; 2509 struct net_device *dev = NULL; 2510 struct sk_buff *nskb; 2511 int err; 2512 u32 ext_filter_mask = 0; 2513 2514 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2515 if (err < 0) 2516 return err; 2517 2518 if (tb[IFLA_IFNAME]) 2519 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2520 2521 if (tb[IFLA_EXT_MASK]) 2522 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2523 2524 ifm = nlmsg_data(nlh); 2525 if (ifm->ifi_index > 0) 2526 dev = __dev_get_by_index(net, ifm->ifi_index); 2527 else if (tb[IFLA_IFNAME]) 2528 dev = __dev_get_by_name(net, ifname); 2529 else 2530 return -EINVAL; 2531 2532 if (dev == NULL) 2533 return -ENODEV; 2534 2535 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2536 if (nskb == NULL) 2537 return -ENOBUFS; 2538 2539 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2540 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2541 if (err < 0) { 2542 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2543 WARN_ON(err == -EMSGSIZE); 2544 kfree_skb(nskb); 2545 } else 2546 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2547 2548 return err; 2549 } 2550 2551 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2552 { 2553 struct net *net = sock_net(skb->sk); 2554 struct net_device *dev; 2555 struct nlattr *tb[IFLA_MAX+1]; 2556 u32 ext_filter_mask = 0; 2557 u16 min_ifinfo_dump_size = 0; 2558 int hdrlen; 2559 2560 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2561 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2562 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2563 2564 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2565 if (tb[IFLA_EXT_MASK]) 2566 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2567 } 2568 2569 if (!ext_filter_mask) 2570 return NLMSG_GOODSIZE; 2571 /* 2572 * traverse the list of net devices and compute the minimum 2573 * buffer size based upon the filter mask. 2574 */ 2575 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2576 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2577 if_nlmsg_size(dev, 2578 ext_filter_mask)); 2579 } 2580 2581 return min_ifinfo_dump_size; 2582 } 2583 2584 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2585 { 2586 int idx; 2587 int s_idx = cb->family; 2588 2589 if (s_idx == 0) 2590 s_idx = 1; 2591 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2592 int type = cb->nlh->nlmsg_type-RTM_BASE; 2593 if (idx < s_idx || idx == PF_PACKET) 2594 continue; 2595 if (rtnl_msg_handlers[idx] == NULL || 2596 rtnl_msg_handlers[idx][type].dumpit == NULL) 2597 continue; 2598 if (idx > s_idx) { 2599 memset(&cb->args[0], 0, sizeof(cb->args)); 2600 cb->prev_seq = 0; 2601 cb->seq = 0; 2602 } 2603 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2604 break; 2605 } 2606 cb->family = idx; 2607 2608 return skb->len; 2609 } 2610 2611 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2612 unsigned int change, gfp_t flags) 2613 { 2614 struct net *net = dev_net(dev); 2615 struct sk_buff *skb; 2616 int err = -ENOBUFS; 2617 size_t if_info_size; 2618 2619 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2620 if (skb == NULL) 2621 goto errout; 2622 2623 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2624 if (err < 0) { 2625 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2626 WARN_ON(err == -EMSGSIZE); 2627 kfree_skb(skb); 2628 goto errout; 2629 } 2630 return skb; 2631 errout: 2632 if (err < 0) 2633 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2634 return NULL; 2635 } 2636 2637 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2638 { 2639 struct net *net = dev_net(dev); 2640 2641 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2642 } 2643 2644 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2645 gfp_t flags) 2646 { 2647 struct sk_buff *skb; 2648 2649 if (dev->reg_state != NETREG_REGISTERED) 2650 return; 2651 2652 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2653 if (skb) 2654 rtmsg_ifinfo_send(skb, dev, flags); 2655 } 2656 EXPORT_SYMBOL(rtmsg_ifinfo); 2657 2658 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2659 struct net_device *dev, 2660 u8 *addr, u16 vid, u32 pid, u32 seq, 2661 int type, unsigned int flags, 2662 int nlflags, u16 ndm_state) 2663 { 2664 struct nlmsghdr *nlh; 2665 struct ndmsg *ndm; 2666 2667 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2668 if (!nlh) 2669 return -EMSGSIZE; 2670 2671 ndm = nlmsg_data(nlh); 2672 ndm->ndm_family = AF_BRIDGE; 2673 ndm->ndm_pad1 = 0; 2674 ndm->ndm_pad2 = 0; 2675 ndm->ndm_flags = flags; 2676 ndm->ndm_type = 0; 2677 ndm->ndm_ifindex = dev->ifindex; 2678 ndm->ndm_state = ndm_state; 2679 2680 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2681 goto nla_put_failure; 2682 if (vid) 2683 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2684 goto nla_put_failure; 2685 2686 nlmsg_end(skb, nlh); 2687 return 0; 2688 2689 nla_put_failure: 2690 nlmsg_cancel(skb, nlh); 2691 return -EMSGSIZE; 2692 } 2693 2694 static inline size_t rtnl_fdb_nlmsg_size(void) 2695 { 2696 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2697 } 2698 2699 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2700 u16 ndm_state) 2701 { 2702 struct net *net = dev_net(dev); 2703 struct sk_buff *skb; 2704 int err = -ENOBUFS; 2705 2706 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2707 if (!skb) 2708 goto errout; 2709 2710 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2711 0, 0, type, NTF_SELF, 0, ndm_state); 2712 if (err < 0) { 2713 kfree_skb(skb); 2714 goto errout; 2715 } 2716 2717 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2718 return; 2719 errout: 2720 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2721 } 2722 2723 /** 2724 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2725 */ 2726 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2727 struct nlattr *tb[], 2728 struct net_device *dev, 2729 const unsigned char *addr, u16 vid, 2730 u16 flags) 2731 { 2732 int err = -EINVAL; 2733 2734 /* If aging addresses are supported device will need to 2735 * implement its own handler for this. 2736 */ 2737 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2738 pr_info("%s: FDB only supports static addresses\n", dev->name); 2739 return err; 2740 } 2741 2742 if (vid) { 2743 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2744 return err; 2745 } 2746 2747 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2748 err = dev_uc_add_excl(dev, addr); 2749 else if (is_multicast_ether_addr(addr)) 2750 err = dev_mc_add_excl(dev, addr); 2751 2752 /* Only return duplicate errors if NLM_F_EXCL is set */ 2753 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2754 err = 0; 2755 2756 return err; 2757 } 2758 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2759 2760 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2761 { 2762 u16 vid = 0; 2763 2764 if (vlan_attr) { 2765 if (nla_len(vlan_attr) != sizeof(u16)) { 2766 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2767 return -EINVAL; 2768 } 2769 2770 vid = nla_get_u16(vlan_attr); 2771 2772 if (!vid || vid >= VLAN_VID_MASK) { 2773 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2774 vid); 2775 return -EINVAL; 2776 } 2777 } 2778 *p_vid = vid; 2779 return 0; 2780 } 2781 2782 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2783 { 2784 struct net *net = sock_net(skb->sk); 2785 struct ndmsg *ndm; 2786 struct nlattr *tb[NDA_MAX+1]; 2787 struct net_device *dev; 2788 u8 *addr; 2789 u16 vid; 2790 int err; 2791 2792 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2793 if (err < 0) 2794 return err; 2795 2796 ndm = nlmsg_data(nlh); 2797 if (ndm->ndm_ifindex == 0) { 2798 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2799 return -EINVAL; 2800 } 2801 2802 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2803 if (dev == NULL) { 2804 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2805 return -ENODEV; 2806 } 2807 2808 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2809 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2810 return -EINVAL; 2811 } 2812 2813 addr = nla_data(tb[NDA_LLADDR]); 2814 2815 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2816 if (err) 2817 return err; 2818 2819 err = -EOPNOTSUPP; 2820 2821 /* Support fdb on master device the net/bridge default case */ 2822 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2823 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2824 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2825 const struct net_device_ops *ops = br_dev->netdev_ops; 2826 2827 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2828 nlh->nlmsg_flags); 2829 if (err) 2830 goto out; 2831 else 2832 ndm->ndm_flags &= ~NTF_MASTER; 2833 } 2834 2835 /* Embedded bridge, macvlan, and any other device support */ 2836 if ((ndm->ndm_flags & NTF_SELF)) { 2837 if (dev->netdev_ops->ndo_fdb_add) 2838 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 2839 vid, 2840 nlh->nlmsg_flags); 2841 else 2842 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 2843 nlh->nlmsg_flags); 2844 2845 if (!err) { 2846 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 2847 ndm->ndm_state); 2848 ndm->ndm_flags &= ~NTF_SELF; 2849 } 2850 } 2851 out: 2852 return err; 2853 } 2854 2855 /** 2856 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 2857 */ 2858 int ndo_dflt_fdb_del(struct ndmsg *ndm, 2859 struct nlattr *tb[], 2860 struct net_device *dev, 2861 const unsigned char *addr, u16 vid) 2862 { 2863 int err = -EINVAL; 2864 2865 /* If aging addresses are supported device will need to 2866 * implement its own handler for this. 2867 */ 2868 if (!(ndm->ndm_state & NUD_PERMANENT)) { 2869 pr_info("%s: FDB only supports static addresses\n", dev->name); 2870 return err; 2871 } 2872 2873 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2874 err = dev_uc_del(dev, addr); 2875 else if (is_multicast_ether_addr(addr)) 2876 err = dev_mc_del(dev, addr); 2877 2878 return err; 2879 } 2880 EXPORT_SYMBOL(ndo_dflt_fdb_del); 2881 2882 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 2883 { 2884 struct net *net = sock_net(skb->sk); 2885 struct ndmsg *ndm; 2886 struct nlattr *tb[NDA_MAX+1]; 2887 struct net_device *dev; 2888 int err = -EINVAL; 2889 __u8 *addr; 2890 u16 vid; 2891 2892 if (!netlink_capable(skb, CAP_NET_ADMIN)) 2893 return -EPERM; 2894 2895 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2896 if (err < 0) 2897 return err; 2898 2899 ndm = nlmsg_data(nlh); 2900 if (ndm->ndm_ifindex == 0) { 2901 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2902 return -EINVAL; 2903 } 2904 2905 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2906 if (dev == NULL) { 2907 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2908 return -ENODEV; 2909 } 2910 2911 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2912 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 2913 return -EINVAL; 2914 } 2915 2916 addr = nla_data(tb[NDA_LLADDR]); 2917 2918 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2919 if (err) 2920 return err; 2921 2922 err = -EOPNOTSUPP; 2923 2924 /* Support fdb on master device the net/bridge default case */ 2925 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2926 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2927 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2928 const struct net_device_ops *ops = br_dev->netdev_ops; 2929 2930 if (ops->ndo_fdb_del) 2931 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 2932 2933 if (err) 2934 goto out; 2935 else 2936 ndm->ndm_flags &= ~NTF_MASTER; 2937 } 2938 2939 /* Embedded bridge, macvlan, and any other device support */ 2940 if (ndm->ndm_flags & NTF_SELF) { 2941 if (dev->netdev_ops->ndo_fdb_del) 2942 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 2943 vid); 2944 else 2945 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 2946 2947 if (!err) { 2948 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 2949 ndm->ndm_state); 2950 ndm->ndm_flags &= ~NTF_SELF; 2951 } 2952 } 2953 out: 2954 return err; 2955 } 2956 2957 static int nlmsg_populate_fdb(struct sk_buff *skb, 2958 struct netlink_callback *cb, 2959 struct net_device *dev, 2960 int *idx, 2961 struct netdev_hw_addr_list *list) 2962 { 2963 struct netdev_hw_addr *ha; 2964 int err; 2965 u32 portid, seq; 2966 2967 portid = NETLINK_CB(cb->skb).portid; 2968 seq = cb->nlh->nlmsg_seq; 2969 2970 list_for_each_entry(ha, &list->list, list) { 2971 if (*idx < cb->args[0]) 2972 goto skip; 2973 2974 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 2975 portid, seq, 2976 RTM_NEWNEIGH, NTF_SELF, 2977 NLM_F_MULTI, NUD_PERMANENT); 2978 if (err < 0) 2979 return err; 2980 skip: 2981 *idx += 1; 2982 } 2983 return 0; 2984 } 2985 2986 /** 2987 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2988 * @nlh: netlink message header 2989 * @dev: netdevice 2990 * 2991 * Default netdevice operation to dump the existing unicast address list. 2992 * Returns number of addresses from list put in skb. 2993 */ 2994 int ndo_dflt_fdb_dump(struct sk_buff *skb, 2995 struct netlink_callback *cb, 2996 struct net_device *dev, 2997 struct net_device *filter_dev, 2998 int idx) 2999 { 3000 int err; 3001 3002 netif_addr_lock_bh(dev); 3003 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 3004 if (err) 3005 goto out; 3006 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 3007 out: 3008 netif_addr_unlock_bh(dev); 3009 cb->args[1] = err; 3010 return idx; 3011 } 3012 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3013 3014 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3015 { 3016 struct net_device *dev; 3017 struct nlattr *tb[IFLA_MAX+1]; 3018 struct net_device *br_dev = NULL; 3019 const struct net_device_ops *ops = NULL; 3020 const struct net_device_ops *cops = NULL; 3021 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3022 struct net *net = sock_net(skb->sk); 3023 int brport_idx = 0; 3024 int br_idx = 0; 3025 int idx = 0; 3026 3027 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 3028 ifla_policy) == 0) { 3029 if (tb[IFLA_MASTER]) 3030 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3031 } 3032 3033 brport_idx = ifm->ifi_index; 3034 3035 if (br_idx) { 3036 br_dev = __dev_get_by_index(net, br_idx); 3037 if (!br_dev) 3038 return -ENODEV; 3039 3040 ops = br_dev->netdev_ops; 3041 } 3042 3043 cb->args[1] = 0; 3044 for_each_netdev(net, dev) { 3045 if (brport_idx && (dev->ifindex != brport_idx)) 3046 continue; 3047 3048 if (!br_idx) { /* user did not specify a specific bridge */ 3049 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3050 br_dev = netdev_master_upper_dev_get(dev); 3051 cops = br_dev->netdev_ops; 3052 } 3053 3054 } else { 3055 if (dev != br_dev && 3056 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3057 continue; 3058 3059 if (br_dev != netdev_master_upper_dev_get(dev) && 3060 !(dev->priv_flags & IFF_EBRIDGE)) 3061 continue; 3062 3063 cops = ops; 3064 } 3065 3066 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3067 if (cops && cops->ndo_fdb_dump) 3068 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev, 3069 idx); 3070 } 3071 if (cb->args[1] == -EMSGSIZE) 3072 break; 3073 3074 if (dev->netdev_ops->ndo_fdb_dump) 3075 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL, 3076 idx); 3077 else 3078 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); 3079 if (cb->args[1] == -EMSGSIZE) 3080 break; 3081 3082 cops = NULL; 3083 } 3084 3085 cb->args[0] = idx; 3086 return skb->len; 3087 } 3088 3089 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3090 unsigned int attrnum, unsigned int flag) 3091 { 3092 if (mask & flag) 3093 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3094 return 0; 3095 } 3096 3097 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3098 struct net_device *dev, u16 mode, 3099 u32 flags, u32 mask, int nlflags, 3100 u32 filter_mask, 3101 int (*vlan_fill)(struct sk_buff *skb, 3102 struct net_device *dev, 3103 u32 filter_mask)) 3104 { 3105 struct nlmsghdr *nlh; 3106 struct ifinfomsg *ifm; 3107 struct nlattr *br_afspec; 3108 struct nlattr *protinfo; 3109 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3110 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3111 int err = 0; 3112 3113 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3114 if (nlh == NULL) 3115 return -EMSGSIZE; 3116 3117 ifm = nlmsg_data(nlh); 3118 ifm->ifi_family = AF_BRIDGE; 3119 ifm->__ifi_pad = 0; 3120 ifm->ifi_type = dev->type; 3121 ifm->ifi_index = dev->ifindex; 3122 ifm->ifi_flags = dev_get_flags(dev); 3123 ifm->ifi_change = 0; 3124 3125 3126 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3127 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3128 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3129 (br_dev && 3130 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3131 (dev->addr_len && 3132 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3133 (dev->ifindex != dev_get_iflink(dev) && 3134 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3135 goto nla_put_failure; 3136 3137 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3138 if (!br_afspec) 3139 goto nla_put_failure; 3140 3141 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3142 nla_nest_cancel(skb, br_afspec); 3143 goto nla_put_failure; 3144 } 3145 3146 if (mode != BRIDGE_MODE_UNDEF) { 3147 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3148 nla_nest_cancel(skb, br_afspec); 3149 goto nla_put_failure; 3150 } 3151 } 3152 if (vlan_fill) { 3153 err = vlan_fill(skb, dev, filter_mask); 3154 if (err) { 3155 nla_nest_cancel(skb, br_afspec); 3156 goto nla_put_failure; 3157 } 3158 } 3159 nla_nest_end(skb, br_afspec); 3160 3161 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3162 if (!protinfo) 3163 goto nla_put_failure; 3164 3165 if (brport_nla_put_flag(skb, flags, mask, 3166 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3167 brport_nla_put_flag(skb, flags, mask, 3168 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3169 brport_nla_put_flag(skb, flags, mask, 3170 IFLA_BRPORT_FAST_LEAVE, 3171 BR_MULTICAST_FAST_LEAVE) || 3172 brport_nla_put_flag(skb, flags, mask, 3173 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3174 brport_nla_put_flag(skb, flags, mask, 3175 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3176 brport_nla_put_flag(skb, flags, mask, 3177 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3178 brport_nla_put_flag(skb, flags, mask, 3179 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3180 brport_nla_put_flag(skb, flags, mask, 3181 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3182 nla_nest_cancel(skb, protinfo); 3183 goto nla_put_failure; 3184 } 3185 3186 nla_nest_end(skb, protinfo); 3187 3188 nlmsg_end(skb, nlh); 3189 return 0; 3190 nla_put_failure: 3191 nlmsg_cancel(skb, nlh); 3192 return err ? err : -EMSGSIZE; 3193 } 3194 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3195 3196 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3197 { 3198 struct net *net = sock_net(skb->sk); 3199 struct net_device *dev; 3200 int idx = 0; 3201 u32 portid = NETLINK_CB(cb->skb).portid; 3202 u32 seq = cb->nlh->nlmsg_seq; 3203 u32 filter_mask = 0; 3204 int err; 3205 3206 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3207 struct nlattr *extfilt; 3208 3209 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3210 IFLA_EXT_MASK); 3211 if (extfilt) { 3212 if (nla_len(extfilt) < sizeof(filter_mask)) 3213 return -EINVAL; 3214 3215 filter_mask = nla_get_u32(extfilt); 3216 } 3217 } 3218 3219 rcu_read_lock(); 3220 for_each_netdev_rcu(net, dev) { 3221 const struct net_device_ops *ops = dev->netdev_ops; 3222 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3223 3224 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3225 if (idx >= cb->args[0]) { 3226 err = br_dev->netdev_ops->ndo_bridge_getlink( 3227 skb, portid, seq, dev, 3228 filter_mask, NLM_F_MULTI); 3229 if (err < 0 && err != -EOPNOTSUPP) 3230 break; 3231 } 3232 idx++; 3233 } 3234 3235 if (ops->ndo_bridge_getlink) { 3236 if (idx >= cb->args[0]) { 3237 err = ops->ndo_bridge_getlink(skb, portid, 3238 seq, dev, 3239 filter_mask, 3240 NLM_F_MULTI); 3241 if (err < 0 && err != -EOPNOTSUPP) 3242 break; 3243 } 3244 idx++; 3245 } 3246 } 3247 rcu_read_unlock(); 3248 cb->args[0] = idx; 3249 3250 return skb->len; 3251 } 3252 3253 static inline size_t bridge_nlmsg_size(void) 3254 { 3255 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3256 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3257 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3258 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3259 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3260 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3261 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3262 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3263 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3264 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3265 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3266 } 3267 3268 static int rtnl_bridge_notify(struct net_device *dev) 3269 { 3270 struct net *net = dev_net(dev); 3271 struct sk_buff *skb; 3272 int err = -EOPNOTSUPP; 3273 3274 if (!dev->netdev_ops->ndo_bridge_getlink) 3275 return 0; 3276 3277 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3278 if (!skb) { 3279 err = -ENOMEM; 3280 goto errout; 3281 } 3282 3283 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3284 if (err < 0) 3285 goto errout; 3286 3287 if (!skb->len) 3288 goto errout; 3289 3290 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3291 return 0; 3292 errout: 3293 WARN_ON(err == -EMSGSIZE); 3294 kfree_skb(skb); 3295 if (err) 3296 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3297 return err; 3298 } 3299 3300 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3301 { 3302 struct net *net = sock_net(skb->sk); 3303 struct ifinfomsg *ifm; 3304 struct net_device *dev; 3305 struct nlattr *br_spec, *attr = NULL; 3306 int rem, err = -EOPNOTSUPP; 3307 u16 flags = 0; 3308 bool have_flags = false; 3309 3310 if (nlmsg_len(nlh) < sizeof(*ifm)) 3311 return -EINVAL; 3312 3313 ifm = nlmsg_data(nlh); 3314 if (ifm->ifi_family != AF_BRIDGE) 3315 return -EPFNOSUPPORT; 3316 3317 dev = __dev_get_by_index(net, ifm->ifi_index); 3318 if (!dev) { 3319 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3320 return -ENODEV; 3321 } 3322 3323 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3324 if (br_spec) { 3325 nla_for_each_nested(attr, br_spec, rem) { 3326 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3327 if (nla_len(attr) < sizeof(flags)) 3328 return -EINVAL; 3329 3330 have_flags = true; 3331 flags = nla_get_u16(attr); 3332 break; 3333 } 3334 } 3335 } 3336 3337 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3338 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3339 3340 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3341 err = -EOPNOTSUPP; 3342 goto out; 3343 } 3344 3345 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3346 if (err) 3347 goto out; 3348 3349 flags &= ~BRIDGE_FLAGS_MASTER; 3350 } 3351 3352 if ((flags & BRIDGE_FLAGS_SELF)) { 3353 if (!dev->netdev_ops->ndo_bridge_setlink) 3354 err = -EOPNOTSUPP; 3355 else 3356 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3357 flags); 3358 if (!err) { 3359 flags &= ~BRIDGE_FLAGS_SELF; 3360 3361 /* Generate event to notify upper layer of bridge 3362 * change 3363 */ 3364 err = rtnl_bridge_notify(dev); 3365 } 3366 } 3367 3368 if (have_flags) 3369 memcpy(nla_data(attr), &flags, sizeof(flags)); 3370 out: 3371 return err; 3372 } 3373 3374 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3375 { 3376 struct net *net = sock_net(skb->sk); 3377 struct ifinfomsg *ifm; 3378 struct net_device *dev; 3379 struct nlattr *br_spec, *attr = NULL; 3380 int rem, err = -EOPNOTSUPP; 3381 u16 flags = 0; 3382 bool have_flags = false; 3383 3384 if (nlmsg_len(nlh) < sizeof(*ifm)) 3385 return -EINVAL; 3386 3387 ifm = nlmsg_data(nlh); 3388 if (ifm->ifi_family != AF_BRIDGE) 3389 return -EPFNOSUPPORT; 3390 3391 dev = __dev_get_by_index(net, ifm->ifi_index); 3392 if (!dev) { 3393 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3394 return -ENODEV; 3395 } 3396 3397 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3398 if (br_spec) { 3399 nla_for_each_nested(attr, br_spec, rem) { 3400 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3401 if (nla_len(attr) < sizeof(flags)) 3402 return -EINVAL; 3403 3404 have_flags = true; 3405 flags = nla_get_u16(attr); 3406 break; 3407 } 3408 } 3409 } 3410 3411 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3412 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3413 3414 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3415 err = -EOPNOTSUPP; 3416 goto out; 3417 } 3418 3419 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3420 if (err) 3421 goto out; 3422 3423 flags &= ~BRIDGE_FLAGS_MASTER; 3424 } 3425 3426 if ((flags & BRIDGE_FLAGS_SELF)) { 3427 if (!dev->netdev_ops->ndo_bridge_dellink) 3428 err = -EOPNOTSUPP; 3429 else 3430 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3431 flags); 3432 3433 if (!err) { 3434 flags &= ~BRIDGE_FLAGS_SELF; 3435 3436 /* Generate event to notify upper layer of bridge 3437 * change 3438 */ 3439 err = rtnl_bridge_notify(dev); 3440 } 3441 } 3442 3443 if (have_flags) 3444 memcpy(nla_data(attr), &flags, sizeof(flags)); 3445 out: 3446 return err; 3447 } 3448 3449 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3450 { 3451 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3452 (!idxattr || idxattr == attrid); 3453 } 3454 3455 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3456 int type, u32 pid, u32 seq, u32 change, 3457 unsigned int flags, unsigned int filter_mask, 3458 int *idxattr, int *prividx) 3459 { 3460 struct if_stats_msg *ifsm; 3461 struct nlmsghdr *nlh; 3462 struct nlattr *attr; 3463 int s_prividx = *prividx; 3464 3465 ASSERT_RTNL(); 3466 3467 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3468 if (!nlh) 3469 return -EMSGSIZE; 3470 3471 ifsm = nlmsg_data(nlh); 3472 ifsm->ifindex = dev->ifindex; 3473 ifsm->filter_mask = filter_mask; 3474 3475 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3476 struct rtnl_link_stats64 *sp; 3477 3478 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3479 sizeof(struct rtnl_link_stats64), 3480 IFLA_STATS_UNSPEC); 3481 if (!attr) 3482 goto nla_put_failure; 3483 3484 sp = nla_data(attr); 3485 dev_get_stats(dev, sp); 3486 } 3487 3488 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3489 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3490 3491 if (ops && ops->fill_linkxstats) { 3492 int err; 3493 3494 *idxattr = IFLA_STATS_LINK_XSTATS; 3495 attr = nla_nest_start(skb, 3496 IFLA_STATS_LINK_XSTATS); 3497 if (!attr) 3498 goto nla_put_failure; 3499 3500 err = ops->fill_linkxstats(skb, dev, prividx); 3501 nla_nest_end(skb, attr); 3502 if (err) 3503 goto nla_put_failure; 3504 *idxattr = 0; 3505 } 3506 } 3507 3508 nlmsg_end(skb, nlh); 3509 3510 return 0; 3511 3512 nla_put_failure: 3513 /* not a multi message or no progress mean a real error */ 3514 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 3515 nlmsg_cancel(skb, nlh); 3516 else 3517 nlmsg_end(skb, nlh); 3518 3519 return -EMSGSIZE; 3520 } 3521 3522 static const struct nla_policy ifla_stats_policy[IFLA_STATS_MAX + 1] = { 3523 [IFLA_STATS_LINK_64] = { .len = sizeof(struct rtnl_link_stats64) }, 3524 }; 3525 3526 static size_t if_nlmsg_stats_size(const struct net_device *dev, 3527 u32 filter_mask) 3528 { 3529 size_t size = 0; 3530 3531 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 3532 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 3533 3534 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 3535 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3536 3537 if (ops && ops->get_linkxstats_size) { 3538 size += nla_total_size(ops->get_linkxstats_size(dev)); 3539 /* for IFLA_STATS_LINK_XSTATS */ 3540 size += nla_total_size(0); 3541 } 3542 } 3543 3544 return size; 3545 } 3546 3547 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh) 3548 { 3549 struct net *net = sock_net(skb->sk); 3550 struct net_device *dev = NULL; 3551 int idxattr = 0, prividx = 0; 3552 struct if_stats_msg *ifsm; 3553 struct sk_buff *nskb; 3554 u32 filter_mask; 3555 int err; 3556 3557 ifsm = nlmsg_data(nlh); 3558 if (ifsm->ifindex > 0) 3559 dev = __dev_get_by_index(net, ifsm->ifindex); 3560 else 3561 return -EINVAL; 3562 3563 if (!dev) 3564 return -ENODEV; 3565 3566 filter_mask = ifsm->filter_mask; 3567 if (!filter_mask) 3568 return -EINVAL; 3569 3570 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 3571 if (!nskb) 3572 return -ENOBUFS; 3573 3574 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 3575 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 3576 0, filter_mask, &idxattr, &prividx); 3577 if (err < 0) { 3578 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 3579 WARN_ON(err == -EMSGSIZE); 3580 kfree_skb(nskb); 3581 } else { 3582 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3583 } 3584 3585 return err; 3586 } 3587 3588 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 3589 { 3590 int h, s_h, err, s_idx, s_idxattr, s_prividx; 3591 struct net *net = sock_net(skb->sk); 3592 unsigned int flags = NLM_F_MULTI; 3593 struct if_stats_msg *ifsm; 3594 struct hlist_head *head; 3595 struct net_device *dev; 3596 u32 filter_mask = 0; 3597 int idx = 0; 3598 3599 s_h = cb->args[0]; 3600 s_idx = cb->args[1]; 3601 s_idxattr = cb->args[2]; 3602 s_prividx = cb->args[3]; 3603 3604 cb->seq = net->dev_base_seq; 3605 3606 ifsm = nlmsg_data(cb->nlh); 3607 filter_mask = ifsm->filter_mask; 3608 if (!filter_mask) 3609 return -EINVAL; 3610 3611 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3612 idx = 0; 3613 head = &net->dev_index_head[h]; 3614 hlist_for_each_entry(dev, head, index_hlist) { 3615 if (idx < s_idx) 3616 goto cont; 3617 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 3618 NETLINK_CB(cb->skb).portid, 3619 cb->nlh->nlmsg_seq, 0, 3620 flags, filter_mask, 3621 &s_idxattr, &s_prividx); 3622 /* If we ran out of room on the first message, 3623 * we're in trouble 3624 */ 3625 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 3626 3627 if (err < 0) 3628 goto out; 3629 s_prividx = 0; 3630 s_idxattr = 0; 3631 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 3632 cont: 3633 idx++; 3634 } 3635 } 3636 out: 3637 cb->args[3] = s_prividx; 3638 cb->args[2] = s_idxattr; 3639 cb->args[1] = idx; 3640 cb->args[0] = h; 3641 3642 return skb->len; 3643 } 3644 3645 /* Process one rtnetlink message. */ 3646 3647 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3648 { 3649 struct net *net = sock_net(skb->sk); 3650 rtnl_doit_func doit; 3651 int kind; 3652 int family; 3653 int type; 3654 int err; 3655 3656 type = nlh->nlmsg_type; 3657 if (type > RTM_MAX) 3658 return -EOPNOTSUPP; 3659 3660 type -= RTM_BASE; 3661 3662 /* All the messages must have at least 1 byte length */ 3663 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3664 return 0; 3665 3666 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3667 kind = type&3; 3668 3669 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 3670 return -EPERM; 3671 3672 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 3673 struct sock *rtnl; 3674 rtnl_dumpit_func dumpit; 3675 rtnl_calcit_func calcit; 3676 u16 min_dump_alloc = 0; 3677 3678 dumpit = rtnl_get_dumpit(family, type); 3679 if (dumpit == NULL) 3680 return -EOPNOTSUPP; 3681 calcit = rtnl_get_calcit(family, type); 3682 if (calcit) 3683 min_dump_alloc = calcit(skb, nlh); 3684 3685 __rtnl_unlock(); 3686 rtnl = net->rtnl; 3687 { 3688 struct netlink_dump_control c = { 3689 .dump = dumpit, 3690 .min_dump_alloc = min_dump_alloc, 3691 }; 3692 err = netlink_dump_start(rtnl, skb, nlh, &c); 3693 } 3694 rtnl_lock(); 3695 return err; 3696 } 3697 3698 doit = rtnl_get_doit(family, type); 3699 if (doit == NULL) 3700 return -EOPNOTSUPP; 3701 3702 return doit(skb, nlh); 3703 } 3704 3705 static void rtnetlink_rcv(struct sk_buff *skb) 3706 { 3707 rtnl_lock(); 3708 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 3709 rtnl_unlock(); 3710 } 3711 3712 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 3713 { 3714 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3715 3716 switch (event) { 3717 case NETDEV_UP: 3718 case NETDEV_DOWN: 3719 case NETDEV_PRE_UP: 3720 case NETDEV_POST_INIT: 3721 case NETDEV_REGISTER: 3722 case NETDEV_CHANGE: 3723 case NETDEV_PRE_TYPE_CHANGE: 3724 case NETDEV_GOING_DOWN: 3725 case NETDEV_UNREGISTER: 3726 case NETDEV_UNREGISTER_FINAL: 3727 case NETDEV_RELEASE: 3728 case NETDEV_JOIN: 3729 case NETDEV_BONDING_INFO: 3730 break; 3731 default: 3732 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 3733 break; 3734 } 3735 return NOTIFY_DONE; 3736 } 3737 3738 static struct notifier_block rtnetlink_dev_notifier = { 3739 .notifier_call = rtnetlink_event, 3740 }; 3741 3742 3743 static int __net_init rtnetlink_net_init(struct net *net) 3744 { 3745 struct sock *sk; 3746 struct netlink_kernel_cfg cfg = { 3747 .groups = RTNLGRP_MAX, 3748 .input = rtnetlink_rcv, 3749 .cb_mutex = &rtnl_mutex, 3750 .flags = NL_CFG_F_NONROOT_RECV, 3751 }; 3752 3753 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 3754 if (!sk) 3755 return -ENOMEM; 3756 net->rtnl = sk; 3757 return 0; 3758 } 3759 3760 static void __net_exit rtnetlink_net_exit(struct net *net) 3761 { 3762 netlink_kernel_release(net->rtnl); 3763 net->rtnl = NULL; 3764 } 3765 3766 static struct pernet_operations rtnetlink_net_ops = { 3767 .init = rtnetlink_net_init, 3768 .exit = rtnetlink_net_exit, 3769 }; 3770 3771 void __init rtnetlink_init(void) 3772 { 3773 if (register_pernet_subsys(&rtnetlink_net_ops)) 3774 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 3775 3776 register_netdevice_notifier(&rtnetlink_dev_notifier); 3777 3778 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 3779 rtnl_dump_ifinfo, rtnl_calcit); 3780 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 3781 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 3782 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 3783 3784 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 3785 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 3786 3787 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 3788 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 3789 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 3790 3791 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 3792 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 3793 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 3794 3795 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 3796 NULL); 3797 } 3798