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 int 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 { 502 struct rtnl_af_ops *af_ops; 503 size_t size; 504 505 /* IFLA_AF_SPEC */ 506 size = nla_total_size(sizeof(struct nlattr)); 507 508 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 509 if (af_ops->get_link_af_size) { 510 /* AF_* + nested data */ 511 size += nla_total_size(sizeof(struct nlattr)) + 512 af_ops->get_link_af_size(dev); 513 } 514 } 515 516 return size; 517 } 518 519 static bool rtnl_have_link_slave_info(const struct net_device *dev) 520 { 521 struct net_device *master_dev; 522 523 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 524 if (master_dev && master_dev->rtnl_link_ops) 525 return true; 526 return false; 527 } 528 529 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 530 const struct net_device *dev) 531 { 532 struct net_device *master_dev; 533 const struct rtnl_link_ops *ops; 534 struct nlattr *slave_data; 535 int err; 536 537 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 538 if (!master_dev) 539 return 0; 540 ops = master_dev->rtnl_link_ops; 541 if (!ops) 542 return 0; 543 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 544 return -EMSGSIZE; 545 if (ops->fill_slave_info) { 546 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 547 if (!slave_data) 548 return -EMSGSIZE; 549 err = ops->fill_slave_info(skb, master_dev, dev); 550 if (err < 0) 551 goto err_cancel_slave_data; 552 nla_nest_end(skb, slave_data); 553 } 554 return 0; 555 556 err_cancel_slave_data: 557 nla_nest_cancel(skb, slave_data); 558 return err; 559 } 560 561 static int rtnl_link_info_fill(struct sk_buff *skb, 562 const struct net_device *dev) 563 { 564 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 565 struct nlattr *data; 566 int err; 567 568 if (!ops) 569 return 0; 570 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 571 return -EMSGSIZE; 572 if (ops->fill_xstats) { 573 err = ops->fill_xstats(skb, dev); 574 if (err < 0) 575 return err; 576 } 577 if (ops->fill_info) { 578 data = nla_nest_start(skb, IFLA_INFO_DATA); 579 if (data == NULL) 580 return -EMSGSIZE; 581 err = ops->fill_info(skb, dev); 582 if (err < 0) 583 goto err_cancel_data; 584 nla_nest_end(skb, data); 585 } 586 return 0; 587 588 err_cancel_data: 589 nla_nest_cancel(skb, data); 590 return err; 591 } 592 593 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 594 { 595 struct nlattr *linkinfo; 596 int err = -EMSGSIZE; 597 598 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 599 if (linkinfo == NULL) 600 goto out; 601 602 err = rtnl_link_info_fill(skb, dev); 603 if (err < 0) 604 goto err_cancel_link; 605 606 err = rtnl_link_slave_info_fill(skb, dev); 607 if (err < 0) 608 goto err_cancel_link; 609 610 nla_nest_end(skb, linkinfo); 611 return 0; 612 613 err_cancel_link: 614 nla_nest_cancel(skb, linkinfo); 615 out: 616 return err; 617 } 618 619 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 620 { 621 struct sock *rtnl = net->rtnl; 622 int err = 0; 623 624 NETLINK_CB(skb).dst_group = group; 625 if (echo) 626 atomic_inc(&skb->users); 627 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 628 if (echo) 629 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 630 return err; 631 } 632 633 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 634 { 635 struct sock *rtnl = net->rtnl; 636 637 return nlmsg_unicast(rtnl, skb, pid); 638 } 639 EXPORT_SYMBOL(rtnl_unicast); 640 641 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 642 struct nlmsghdr *nlh, gfp_t flags) 643 { 644 struct sock *rtnl = net->rtnl; 645 int report = 0; 646 647 if (nlh) 648 report = nlmsg_report(nlh); 649 650 nlmsg_notify(rtnl, skb, pid, group, report, flags); 651 } 652 EXPORT_SYMBOL(rtnl_notify); 653 654 void rtnl_set_sk_err(struct net *net, u32 group, int error) 655 { 656 struct sock *rtnl = net->rtnl; 657 658 netlink_set_err(rtnl, 0, group, error); 659 } 660 EXPORT_SYMBOL(rtnl_set_sk_err); 661 662 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 663 { 664 struct nlattr *mx; 665 int i, valid = 0; 666 667 mx = nla_nest_start(skb, RTA_METRICS); 668 if (mx == NULL) 669 return -ENOBUFS; 670 671 for (i = 0; i < RTAX_MAX; i++) { 672 if (metrics[i]) { 673 if (i == RTAX_CC_ALGO - 1) { 674 char tmp[TCP_CA_NAME_MAX], *name; 675 676 name = tcp_ca_get_name_by_key(metrics[i], tmp); 677 if (!name) 678 continue; 679 if (nla_put_string(skb, i + 1, name)) 680 goto nla_put_failure; 681 } else { 682 if (nla_put_u32(skb, i + 1, metrics[i])) 683 goto nla_put_failure; 684 } 685 valid++; 686 } 687 } 688 689 if (!valid) { 690 nla_nest_cancel(skb, mx); 691 return 0; 692 } 693 694 return nla_nest_end(skb, mx); 695 696 nla_put_failure: 697 nla_nest_cancel(skb, mx); 698 return -EMSGSIZE; 699 } 700 EXPORT_SYMBOL(rtnetlink_put_metrics); 701 702 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 703 long expires, u32 error) 704 { 705 struct rta_cacheinfo ci = { 706 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 707 .rta_used = dst->__use, 708 .rta_clntref = atomic_read(&(dst->__refcnt)), 709 .rta_error = error, 710 .rta_id = id, 711 }; 712 713 if (expires) { 714 unsigned long clock; 715 716 clock = jiffies_to_clock_t(abs(expires)); 717 clock = min_t(unsigned long, clock, INT_MAX); 718 ci.rta_expires = (expires > 0) ? clock : -clock; 719 } 720 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 721 } 722 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 723 724 static void set_operstate(struct net_device *dev, unsigned char transition) 725 { 726 unsigned char operstate = dev->operstate; 727 728 switch (transition) { 729 case IF_OPER_UP: 730 if ((operstate == IF_OPER_DORMANT || 731 operstate == IF_OPER_UNKNOWN) && 732 !netif_dormant(dev)) 733 operstate = IF_OPER_UP; 734 break; 735 736 case IF_OPER_DORMANT: 737 if (operstate == IF_OPER_UP || 738 operstate == IF_OPER_UNKNOWN) 739 operstate = IF_OPER_DORMANT; 740 break; 741 } 742 743 if (dev->operstate != operstate) { 744 write_lock_bh(&dev_base_lock); 745 dev->operstate = operstate; 746 write_unlock_bh(&dev_base_lock); 747 netdev_state_change(dev); 748 } 749 } 750 751 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 752 { 753 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 754 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 755 } 756 757 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 758 const struct ifinfomsg *ifm) 759 { 760 unsigned int flags = ifm->ifi_flags; 761 762 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 763 if (ifm->ifi_change) 764 flags = (flags & ifm->ifi_change) | 765 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 766 767 return flags; 768 } 769 770 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 771 const struct rtnl_link_stats64 *b) 772 { 773 a->rx_packets = b->rx_packets; 774 a->tx_packets = b->tx_packets; 775 a->rx_bytes = b->rx_bytes; 776 a->tx_bytes = b->tx_bytes; 777 a->rx_errors = b->rx_errors; 778 a->tx_errors = b->tx_errors; 779 a->rx_dropped = b->rx_dropped; 780 a->tx_dropped = b->tx_dropped; 781 782 a->multicast = b->multicast; 783 a->collisions = b->collisions; 784 785 a->rx_length_errors = b->rx_length_errors; 786 a->rx_over_errors = b->rx_over_errors; 787 a->rx_crc_errors = b->rx_crc_errors; 788 a->rx_frame_errors = b->rx_frame_errors; 789 a->rx_fifo_errors = b->rx_fifo_errors; 790 a->rx_missed_errors = b->rx_missed_errors; 791 792 a->tx_aborted_errors = b->tx_aborted_errors; 793 a->tx_carrier_errors = b->tx_carrier_errors; 794 a->tx_fifo_errors = b->tx_fifo_errors; 795 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 796 a->tx_window_errors = b->tx_window_errors; 797 798 a->rx_compressed = b->rx_compressed; 799 a->tx_compressed = b->tx_compressed; 800 } 801 802 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) 803 { 804 memcpy(v, b, sizeof(*b)); 805 } 806 807 /* All VF info */ 808 static inline int rtnl_vfinfo_size(const struct net_device *dev, 809 u32 ext_filter_mask) 810 { 811 if (dev->dev.parent && dev_is_pci(dev->dev.parent) && 812 (ext_filter_mask & RTEXT_FILTER_VF)) { 813 int num_vfs = dev_num_vf(dev->dev.parent); 814 size_t size = nla_total_size(sizeof(struct nlattr)); 815 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 816 size += num_vfs * 817 (nla_total_size(sizeof(struct ifla_vf_mac)) + 818 nla_total_size(sizeof(struct ifla_vf_vlan)) + 819 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 820 nla_total_size(sizeof(struct ifla_vf_rate)) + 821 nla_total_size(sizeof(struct ifla_vf_link_state))); 822 return size; 823 } else 824 return 0; 825 } 826 827 static size_t rtnl_port_size(const struct net_device *dev, 828 u32 ext_filter_mask) 829 { 830 size_t port_size = nla_total_size(4) /* PORT_VF */ 831 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 832 + nla_total_size(sizeof(struct ifla_port_vsi)) 833 /* PORT_VSI_TYPE */ 834 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 835 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 836 + nla_total_size(1) /* PROT_VDP_REQUEST */ 837 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 838 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 839 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 840 + port_size; 841 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 842 + port_size; 843 844 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 845 !(ext_filter_mask & RTEXT_FILTER_VF)) 846 return 0; 847 if (dev_num_vf(dev->dev.parent)) 848 return port_self_size + vf_ports_size + 849 vf_port_size * dev_num_vf(dev->dev.parent); 850 else 851 return port_self_size; 852 } 853 854 static noinline size_t if_nlmsg_size(const struct net_device *dev, 855 u32 ext_filter_mask) 856 { 857 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 858 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 859 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 860 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 861 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 862 + nla_total_size(sizeof(struct rtnl_link_stats)) 863 + nla_total_size(sizeof(struct rtnl_link_stats64)) 864 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 865 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 866 + nla_total_size(4) /* IFLA_TXQLEN */ 867 + nla_total_size(4) /* IFLA_WEIGHT */ 868 + nla_total_size(4) /* IFLA_MTU */ 869 + nla_total_size(4) /* IFLA_LINK */ 870 + nla_total_size(4) /* IFLA_MASTER */ 871 + nla_total_size(1) /* IFLA_CARRIER */ 872 + nla_total_size(4) /* IFLA_PROMISCUITY */ 873 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 874 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 875 + nla_total_size(1) /* IFLA_OPERSTATE */ 876 + nla_total_size(1) /* IFLA_LINKMODE */ 877 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 878 + nla_total_size(ext_filter_mask 879 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 880 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 881 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 882 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 883 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */ 884 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 885 + nla_total_size(MAX_PHYS_ITEM_ID_LEN); /* IFLA_PHYS_SWITCH_ID */ 886 } 887 888 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 889 { 890 struct nlattr *vf_ports; 891 struct nlattr *vf_port; 892 int vf; 893 int err; 894 895 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 896 if (!vf_ports) 897 return -EMSGSIZE; 898 899 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 900 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 901 if (!vf_port) 902 goto nla_put_failure; 903 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 904 goto nla_put_failure; 905 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 906 if (err == -EMSGSIZE) 907 goto nla_put_failure; 908 if (err) { 909 nla_nest_cancel(skb, vf_port); 910 continue; 911 } 912 nla_nest_end(skb, vf_port); 913 } 914 915 nla_nest_end(skb, vf_ports); 916 917 return 0; 918 919 nla_put_failure: 920 nla_nest_cancel(skb, vf_ports); 921 return -EMSGSIZE; 922 } 923 924 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 925 { 926 struct nlattr *port_self; 927 int err; 928 929 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 930 if (!port_self) 931 return -EMSGSIZE; 932 933 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 934 if (err) { 935 nla_nest_cancel(skb, port_self); 936 return (err == -EMSGSIZE) ? err : 0; 937 } 938 939 nla_nest_end(skb, port_self); 940 941 return 0; 942 } 943 944 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 945 u32 ext_filter_mask) 946 { 947 int err; 948 949 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 950 !(ext_filter_mask & RTEXT_FILTER_VF)) 951 return 0; 952 953 err = rtnl_port_self_fill(skb, dev); 954 if (err) 955 return err; 956 957 if (dev_num_vf(dev->dev.parent)) { 958 err = rtnl_vf_ports_fill(skb, dev); 959 if (err) 960 return err; 961 } 962 963 return 0; 964 } 965 966 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 967 { 968 int err; 969 struct netdev_phys_item_id ppid; 970 971 err = dev_get_phys_port_id(dev, &ppid); 972 if (err) { 973 if (err == -EOPNOTSUPP) 974 return 0; 975 return err; 976 } 977 978 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 979 return -EMSGSIZE; 980 981 return 0; 982 } 983 984 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 985 { 986 int err; 987 struct netdev_phys_item_id psid; 988 989 err = netdev_switch_parent_id_get(dev, &psid); 990 if (err) { 991 if (err == -EOPNOTSUPP) 992 return 0; 993 return err; 994 } 995 996 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, psid.id_len, psid.id)) 997 return -EMSGSIZE; 998 999 return 0; 1000 } 1001 1002 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1003 int type, u32 pid, u32 seq, u32 change, 1004 unsigned int flags, u32 ext_filter_mask) 1005 { 1006 struct ifinfomsg *ifm; 1007 struct nlmsghdr *nlh; 1008 struct rtnl_link_stats64 temp; 1009 const struct rtnl_link_stats64 *stats; 1010 struct nlattr *attr, *af_spec; 1011 struct rtnl_af_ops *af_ops; 1012 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1013 1014 ASSERT_RTNL(); 1015 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1016 if (nlh == NULL) 1017 return -EMSGSIZE; 1018 1019 ifm = nlmsg_data(nlh); 1020 ifm->ifi_family = AF_UNSPEC; 1021 ifm->__ifi_pad = 0; 1022 ifm->ifi_type = dev->type; 1023 ifm->ifi_index = dev->ifindex; 1024 ifm->ifi_flags = dev_get_flags(dev); 1025 ifm->ifi_change = change; 1026 1027 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1028 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1029 nla_put_u8(skb, IFLA_OPERSTATE, 1030 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1031 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1032 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1033 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1034 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1035 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1036 #ifdef CONFIG_RPS 1037 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1038 #endif 1039 (dev->ifindex != dev->iflink && 1040 nla_put_u32(skb, IFLA_LINK, dev->iflink)) || 1041 (upper_dev && 1042 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1043 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1044 (dev->qdisc && 1045 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1046 (dev->ifalias && 1047 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1048 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1049 atomic_read(&dev->carrier_changes))) 1050 goto nla_put_failure; 1051 1052 if (1) { 1053 struct rtnl_link_ifmap map = { 1054 .mem_start = dev->mem_start, 1055 .mem_end = dev->mem_end, 1056 .base_addr = dev->base_addr, 1057 .irq = dev->irq, 1058 .dma = dev->dma, 1059 .port = dev->if_port, 1060 }; 1061 if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) 1062 goto nla_put_failure; 1063 } 1064 1065 if (dev->addr_len) { 1066 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1067 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1068 goto nla_put_failure; 1069 } 1070 1071 if (rtnl_phys_port_id_fill(skb, dev)) 1072 goto nla_put_failure; 1073 1074 if (rtnl_phys_switch_id_fill(skb, dev)) 1075 goto nla_put_failure; 1076 1077 attr = nla_reserve(skb, IFLA_STATS, 1078 sizeof(struct rtnl_link_stats)); 1079 if (attr == NULL) 1080 goto nla_put_failure; 1081 1082 stats = dev_get_stats(dev, &temp); 1083 copy_rtnl_link_stats(nla_data(attr), stats); 1084 1085 attr = nla_reserve(skb, IFLA_STATS64, 1086 sizeof(struct rtnl_link_stats64)); 1087 if (attr == NULL) 1088 goto nla_put_failure; 1089 copy_rtnl_link_stats64(nla_data(attr), stats); 1090 1091 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1092 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1093 goto nla_put_failure; 1094 1095 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent 1096 && (ext_filter_mask & RTEXT_FILTER_VF)) { 1097 int i; 1098 1099 struct nlattr *vfinfo, *vf; 1100 int num_vfs = dev_num_vf(dev->dev.parent); 1101 1102 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1103 if (!vfinfo) 1104 goto nla_put_failure; 1105 for (i = 0; i < num_vfs; i++) { 1106 struct ifla_vf_info ivi; 1107 struct ifla_vf_mac vf_mac; 1108 struct ifla_vf_vlan vf_vlan; 1109 struct ifla_vf_rate vf_rate; 1110 struct ifla_vf_tx_rate vf_tx_rate; 1111 struct ifla_vf_spoofchk vf_spoofchk; 1112 struct ifla_vf_link_state vf_linkstate; 1113 1114 /* 1115 * Not all SR-IOV capable drivers support the 1116 * spoofcheck query. Preset to -1 so the user 1117 * space tool can detect that the driver didn't 1118 * report anything. 1119 */ 1120 ivi.spoofchk = -1; 1121 memset(ivi.mac, 0, sizeof(ivi.mac)); 1122 /* The default value for VF link state is "auto" 1123 * IFLA_VF_LINK_STATE_AUTO which equals zero 1124 */ 1125 ivi.linkstate = 0; 1126 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) 1127 break; 1128 vf_mac.vf = 1129 vf_vlan.vf = 1130 vf_rate.vf = 1131 vf_tx_rate.vf = 1132 vf_spoofchk.vf = 1133 vf_linkstate.vf = ivi.vf; 1134 1135 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1136 vf_vlan.vlan = ivi.vlan; 1137 vf_vlan.qos = ivi.qos; 1138 vf_tx_rate.rate = ivi.max_tx_rate; 1139 vf_rate.min_tx_rate = ivi.min_tx_rate; 1140 vf_rate.max_tx_rate = ivi.max_tx_rate; 1141 vf_spoofchk.setting = ivi.spoofchk; 1142 vf_linkstate.link_state = ivi.linkstate; 1143 vf = nla_nest_start(skb, IFLA_VF_INFO); 1144 if (!vf) { 1145 nla_nest_cancel(skb, vfinfo); 1146 goto nla_put_failure; 1147 } 1148 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1149 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1150 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1151 &vf_rate) || 1152 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1153 &vf_tx_rate) || 1154 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1155 &vf_spoofchk) || 1156 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1157 &vf_linkstate)) 1158 goto nla_put_failure; 1159 nla_nest_end(skb, vf); 1160 } 1161 nla_nest_end(skb, vfinfo); 1162 } 1163 1164 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1165 goto nla_put_failure; 1166 1167 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1168 if (rtnl_link_fill(skb, dev) < 0) 1169 goto nla_put_failure; 1170 } 1171 1172 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1173 goto nla_put_failure; 1174 1175 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1176 if (af_ops->fill_link_af) { 1177 struct nlattr *af; 1178 int err; 1179 1180 if (!(af = nla_nest_start(skb, af_ops->family))) 1181 goto nla_put_failure; 1182 1183 err = af_ops->fill_link_af(skb, dev); 1184 1185 /* 1186 * Caller may return ENODATA to indicate that there 1187 * was no data to be dumped. This is not an error, it 1188 * means we should trim the attribute header and 1189 * continue. 1190 */ 1191 if (err == -ENODATA) 1192 nla_nest_cancel(skb, af); 1193 else if (err < 0) 1194 goto nla_put_failure; 1195 1196 nla_nest_end(skb, af); 1197 } 1198 } 1199 1200 nla_nest_end(skb, af_spec); 1201 1202 nlmsg_end(skb, nlh); 1203 return 0; 1204 1205 nla_put_failure: 1206 nlmsg_cancel(skb, nlh); 1207 return -EMSGSIZE; 1208 } 1209 1210 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1211 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1212 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1213 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1214 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1215 [IFLA_MTU] = { .type = NLA_U32 }, 1216 [IFLA_LINK] = { .type = NLA_U32 }, 1217 [IFLA_MASTER] = { .type = NLA_U32 }, 1218 [IFLA_CARRIER] = { .type = NLA_U8 }, 1219 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1220 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1221 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1222 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1223 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1224 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1225 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1226 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1227 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1228 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1229 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1230 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1231 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1232 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1233 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1234 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1235 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1236 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1237 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1238 }; 1239 1240 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1241 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1242 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1243 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1244 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1245 }; 1246 1247 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { 1248 [IFLA_VF_INFO] = { .type = NLA_NESTED }, 1249 }; 1250 1251 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1252 [IFLA_VF_MAC] = { .type = NLA_BINARY, 1253 .len = sizeof(struct ifla_vf_mac) }, 1254 [IFLA_VF_VLAN] = { .type = NLA_BINARY, 1255 .len = sizeof(struct ifla_vf_vlan) }, 1256 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, 1257 .len = sizeof(struct ifla_vf_tx_rate) }, 1258 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY, 1259 .len = sizeof(struct ifla_vf_spoofchk) }, 1260 [IFLA_VF_RATE] = { .type = NLA_BINARY, 1261 .len = sizeof(struct ifla_vf_rate) }, 1262 [IFLA_VF_LINK_STATE] = { .type = NLA_BINARY, 1263 .len = sizeof(struct ifla_vf_link_state) }, 1264 }; 1265 1266 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1267 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1268 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1269 .len = PORT_PROFILE_MAX }, 1270 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1271 .len = sizeof(struct ifla_port_vsi)}, 1272 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1273 .len = PORT_UUID_MAX }, 1274 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1275 .len = PORT_UUID_MAX }, 1276 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1277 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1278 }; 1279 1280 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1281 { 1282 struct net *net = sock_net(skb->sk); 1283 int h, s_h; 1284 int idx = 0, s_idx; 1285 struct net_device *dev; 1286 struct hlist_head *head; 1287 struct nlattr *tb[IFLA_MAX+1]; 1288 u32 ext_filter_mask = 0; 1289 int err; 1290 int hdrlen; 1291 1292 s_h = cb->args[0]; 1293 s_idx = cb->args[1]; 1294 1295 rcu_read_lock(); 1296 cb->seq = net->dev_base_seq; 1297 1298 /* A hack to preserve kernel<->userspace interface. 1299 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1300 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1301 * what iproute2 < v3.9.0 used. 1302 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1303 * attribute, its netlink message is shorter than struct ifinfomsg. 1304 */ 1305 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1306 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1307 1308 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1309 1310 if (tb[IFLA_EXT_MASK]) 1311 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1312 } 1313 1314 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1315 idx = 0; 1316 head = &net->dev_index_head[h]; 1317 hlist_for_each_entry_rcu(dev, head, index_hlist) { 1318 if (idx < s_idx) 1319 goto cont; 1320 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1321 NETLINK_CB(cb->skb).portid, 1322 cb->nlh->nlmsg_seq, 0, 1323 NLM_F_MULTI, 1324 ext_filter_mask); 1325 /* If we ran out of room on the first message, 1326 * we're in trouble 1327 */ 1328 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1329 1330 if (err < 0) 1331 goto out; 1332 1333 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1334 cont: 1335 idx++; 1336 } 1337 } 1338 out: 1339 rcu_read_unlock(); 1340 cb->args[1] = idx; 1341 cb->args[0] = h; 1342 1343 return skb->len; 1344 } 1345 1346 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1347 { 1348 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1349 } 1350 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1351 1352 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1353 { 1354 struct net *net; 1355 /* Examine the link attributes and figure out which 1356 * network namespace we are talking about. 1357 */ 1358 if (tb[IFLA_NET_NS_PID]) 1359 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1360 else if (tb[IFLA_NET_NS_FD]) 1361 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1362 else 1363 net = get_net(src_net); 1364 return net; 1365 } 1366 EXPORT_SYMBOL(rtnl_link_get_net); 1367 1368 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1369 { 1370 if (dev) { 1371 if (tb[IFLA_ADDRESS] && 1372 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1373 return -EINVAL; 1374 1375 if (tb[IFLA_BROADCAST] && 1376 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1377 return -EINVAL; 1378 } 1379 1380 if (tb[IFLA_AF_SPEC]) { 1381 struct nlattr *af; 1382 int rem, err; 1383 1384 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1385 const struct rtnl_af_ops *af_ops; 1386 1387 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1388 return -EAFNOSUPPORT; 1389 1390 if (!af_ops->set_link_af) 1391 return -EOPNOTSUPP; 1392 1393 if (af_ops->validate_link_af) { 1394 err = af_ops->validate_link_af(dev, af); 1395 if (err < 0) 1396 return err; 1397 } 1398 } 1399 } 1400 1401 return 0; 1402 } 1403 1404 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) 1405 { 1406 int rem, err = -EINVAL; 1407 struct nlattr *vf; 1408 const struct net_device_ops *ops = dev->netdev_ops; 1409 1410 nla_for_each_nested(vf, attr, rem) { 1411 switch (nla_type(vf)) { 1412 case IFLA_VF_MAC: { 1413 struct ifla_vf_mac *ivm; 1414 ivm = nla_data(vf); 1415 err = -EOPNOTSUPP; 1416 if (ops->ndo_set_vf_mac) 1417 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1418 ivm->mac); 1419 break; 1420 } 1421 case IFLA_VF_VLAN: { 1422 struct ifla_vf_vlan *ivv; 1423 ivv = nla_data(vf); 1424 err = -EOPNOTSUPP; 1425 if (ops->ndo_set_vf_vlan) 1426 err = ops->ndo_set_vf_vlan(dev, ivv->vf, 1427 ivv->vlan, 1428 ivv->qos); 1429 break; 1430 } 1431 case IFLA_VF_TX_RATE: { 1432 struct ifla_vf_tx_rate *ivt; 1433 struct ifla_vf_info ivf; 1434 ivt = nla_data(vf); 1435 err = -EOPNOTSUPP; 1436 if (ops->ndo_get_vf_config) 1437 err = ops->ndo_get_vf_config(dev, ivt->vf, 1438 &ivf); 1439 if (err) 1440 break; 1441 err = -EOPNOTSUPP; 1442 if (ops->ndo_set_vf_rate) 1443 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1444 ivf.min_tx_rate, 1445 ivt->rate); 1446 break; 1447 } 1448 case IFLA_VF_RATE: { 1449 struct ifla_vf_rate *ivt; 1450 ivt = nla_data(vf); 1451 err = -EOPNOTSUPP; 1452 if (ops->ndo_set_vf_rate) 1453 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1454 ivt->min_tx_rate, 1455 ivt->max_tx_rate); 1456 break; 1457 } 1458 case IFLA_VF_SPOOFCHK: { 1459 struct ifla_vf_spoofchk *ivs; 1460 ivs = nla_data(vf); 1461 err = -EOPNOTSUPP; 1462 if (ops->ndo_set_vf_spoofchk) 1463 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1464 ivs->setting); 1465 break; 1466 } 1467 case IFLA_VF_LINK_STATE: { 1468 struct ifla_vf_link_state *ivl; 1469 ivl = nla_data(vf); 1470 err = -EOPNOTSUPP; 1471 if (ops->ndo_set_vf_link_state) 1472 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1473 ivl->link_state); 1474 break; 1475 } 1476 default: 1477 err = -EINVAL; 1478 break; 1479 } 1480 if (err) 1481 break; 1482 } 1483 return err; 1484 } 1485 1486 static int do_set_master(struct net_device *dev, int ifindex) 1487 { 1488 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1489 const struct net_device_ops *ops; 1490 int err; 1491 1492 if (upper_dev) { 1493 if (upper_dev->ifindex == ifindex) 1494 return 0; 1495 ops = upper_dev->netdev_ops; 1496 if (ops->ndo_del_slave) { 1497 err = ops->ndo_del_slave(upper_dev, dev); 1498 if (err) 1499 return err; 1500 } else { 1501 return -EOPNOTSUPP; 1502 } 1503 } 1504 1505 if (ifindex) { 1506 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1507 if (!upper_dev) 1508 return -EINVAL; 1509 ops = upper_dev->netdev_ops; 1510 if (ops->ndo_add_slave) { 1511 err = ops->ndo_add_slave(upper_dev, dev); 1512 if (err) 1513 return err; 1514 } else { 1515 return -EOPNOTSUPP; 1516 } 1517 } 1518 return 0; 1519 } 1520 1521 #define DO_SETLINK_MODIFIED 0x01 1522 /* notify flag means notify + modified. */ 1523 #define DO_SETLINK_NOTIFY 0x03 1524 static int do_setlink(const struct sk_buff *skb, 1525 struct net_device *dev, struct ifinfomsg *ifm, 1526 struct nlattr **tb, char *ifname, int status) 1527 { 1528 const struct net_device_ops *ops = dev->netdev_ops; 1529 int err; 1530 1531 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1532 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1533 if (IS_ERR(net)) { 1534 err = PTR_ERR(net); 1535 goto errout; 1536 } 1537 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1538 put_net(net); 1539 err = -EPERM; 1540 goto errout; 1541 } 1542 err = dev_change_net_namespace(dev, net, ifname); 1543 put_net(net); 1544 if (err) 1545 goto errout; 1546 status |= DO_SETLINK_MODIFIED; 1547 } 1548 1549 if (tb[IFLA_MAP]) { 1550 struct rtnl_link_ifmap *u_map; 1551 struct ifmap k_map; 1552 1553 if (!ops->ndo_set_config) { 1554 err = -EOPNOTSUPP; 1555 goto errout; 1556 } 1557 1558 if (!netif_device_present(dev)) { 1559 err = -ENODEV; 1560 goto errout; 1561 } 1562 1563 u_map = nla_data(tb[IFLA_MAP]); 1564 k_map.mem_start = (unsigned long) u_map->mem_start; 1565 k_map.mem_end = (unsigned long) u_map->mem_end; 1566 k_map.base_addr = (unsigned short) u_map->base_addr; 1567 k_map.irq = (unsigned char) u_map->irq; 1568 k_map.dma = (unsigned char) u_map->dma; 1569 k_map.port = (unsigned char) u_map->port; 1570 1571 err = ops->ndo_set_config(dev, &k_map); 1572 if (err < 0) 1573 goto errout; 1574 1575 status |= DO_SETLINK_NOTIFY; 1576 } 1577 1578 if (tb[IFLA_ADDRESS]) { 1579 struct sockaddr *sa; 1580 int len; 1581 1582 len = sizeof(sa_family_t) + dev->addr_len; 1583 sa = kmalloc(len, GFP_KERNEL); 1584 if (!sa) { 1585 err = -ENOMEM; 1586 goto errout; 1587 } 1588 sa->sa_family = dev->type; 1589 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1590 dev->addr_len); 1591 err = dev_set_mac_address(dev, sa); 1592 kfree(sa); 1593 if (err) 1594 goto errout; 1595 status |= DO_SETLINK_MODIFIED; 1596 } 1597 1598 if (tb[IFLA_MTU]) { 1599 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1600 if (err < 0) 1601 goto errout; 1602 status |= DO_SETLINK_MODIFIED; 1603 } 1604 1605 if (tb[IFLA_GROUP]) { 1606 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1607 status |= DO_SETLINK_NOTIFY; 1608 } 1609 1610 /* 1611 * Interface selected by interface index but interface 1612 * name provided implies that a name change has been 1613 * requested. 1614 */ 1615 if (ifm->ifi_index > 0 && ifname[0]) { 1616 err = dev_change_name(dev, ifname); 1617 if (err < 0) 1618 goto errout; 1619 status |= DO_SETLINK_MODIFIED; 1620 } 1621 1622 if (tb[IFLA_IFALIAS]) { 1623 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1624 nla_len(tb[IFLA_IFALIAS])); 1625 if (err < 0) 1626 goto errout; 1627 status |= DO_SETLINK_NOTIFY; 1628 } 1629 1630 if (tb[IFLA_BROADCAST]) { 1631 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1632 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1633 } 1634 1635 if (ifm->ifi_flags || ifm->ifi_change) { 1636 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1637 if (err < 0) 1638 goto errout; 1639 } 1640 1641 if (tb[IFLA_MASTER]) { 1642 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1643 if (err) 1644 goto errout; 1645 status |= DO_SETLINK_MODIFIED; 1646 } 1647 1648 if (tb[IFLA_CARRIER]) { 1649 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 1650 if (err) 1651 goto errout; 1652 status |= DO_SETLINK_MODIFIED; 1653 } 1654 1655 if (tb[IFLA_TXQLEN]) { 1656 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 1657 1658 if (dev->tx_queue_len ^ value) 1659 status |= DO_SETLINK_NOTIFY; 1660 1661 dev->tx_queue_len = value; 1662 } 1663 1664 if (tb[IFLA_OPERSTATE]) 1665 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1666 1667 if (tb[IFLA_LINKMODE]) { 1668 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 1669 1670 write_lock_bh(&dev_base_lock); 1671 if (dev->link_mode ^ value) 1672 status |= DO_SETLINK_NOTIFY; 1673 dev->link_mode = value; 1674 write_unlock_bh(&dev_base_lock); 1675 } 1676 1677 if (tb[IFLA_VFINFO_LIST]) { 1678 struct nlattr *attr; 1679 int rem; 1680 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1681 if (nla_type(attr) != IFLA_VF_INFO) { 1682 err = -EINVAL; 1683 goto errout; 1684 } 1685 err = do_setvfinfo(dev, attr); 1686 if (err < 0) 1687 goto errout; 1688 status |= DO_SETLINK_NOTIFY; 1689 } 1690 } 1691 err = 0; 1692 1693 if (tb[IFLA_VF_PORTS]) { 1694 struct nlattr *port[IFLA_PORT_MAX+1]; 1695 struct nlattr *attr; 1696 int vf; 1697 int rem; 1698 1699 err = -EOPNOTSUPP; 1700 if (!ops->ndo_set_vf_port) 1701 goto errout; 1702 1703 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1704 if (nla_type(attr) != IFLA_VF_PORT) 1705 continue; 1706 err = nla_parse_nested(port, IFLA_PORT_MAX, 1707 attr, ifla_port_policy); 1708 if (err < 0) 1709 goto errout; 1710 if (!port[IFLA_PORT_VF]) { 1711 err = -EOPNOTSUPP; 1712 goto errout; 1713 } 1714 vf = nla_get_u32(port[IFLA_PORT_VF]); 1715 err = ops->ndo_set_vf_port(dev, vf, port); 1716 if (err < 0) 1717 goto errout; 1718 status |= DO_SETLINK_NOTIFY; 1719 } 1720 } 1721 err = 0; 1722 1723 if (tb[IFLA_PORT_SELF]) { 1724 struct nlattr *port[IFLA_PORT_MAX+1]; 1725 1726 err = nla_parse_nested(port, IFLA_PORT_MAX, 1727 tb[IFLA_PORT_SELF], ifla_port_policy); 1728 if (err < 0) 1729 goto errout; 1730 1731 err = -EOPNOTSUPP; 1732 if (ops->ndo_set_vf_port) 1733 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1734 if (err < 0) 1735 goto errout; 1736 status |= DO_SETLINK_NOTIFY; 1737 } 1738 1739 if (tb[IFLA_AF_SPEC]) { 1740 struct nlattr *af; 1741 int rem; 1742 1743 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1744 const struct rtnl_af_ops *af_ops; 1745 1746 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1747 BUG(); 1748 1749 err = af_ops->set_link_af(dev, af); 1750 if (err < 0) 1751 goto errout; 1752 1753 status |= DO_SETLINK_NOTIFY; 1754 } 1755 } 1756 err = 0; 1757 1758 errout: 1759 if (status & DO_SETLINK_MODIFIED) { 1760 if (status & DO_SETLINK_NOTIFY) 1761 netdev_state_change(dev); 1762 1763 if (err < 0) 1764 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", 1765 dev->name); 1766 } 1767 1768 return err; 1769 } 1770 1771 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 1772 { 1773 struct net *net = sock_net(skb->sk); 1774 struct ifinfomsg *ifm; 1775 struct net_device *dev; 1776 int err; 1777 struct nlattr *tb[IFLA_MAX+1]; 1778 char ifname[IFNAMSIZ]; 1779 1780 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1781 if (err < 0) 1782 goto errout; 1783 1784 if (tb[IFLA_IFNAME]) 1785 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1786 else 1787 ifname[0] = '\0'; 1788 1789 err = -EINVAL; 1790 ifm = nlmsg_data(nlh); 1791 if (ifm->ifi_index > 0) 1792 dev = __dev_get_by_index(net, ifm->ifi_index); 1793 else if (tb[IFLA_IFNAME]) 1794 dev = __dev_get_by_name(net, ifname); 1795 else 1796 goto errout; 1797 1798 if (dev == NULL) { 1799 err = -ENODEV; 1800 goto errout; 1801 } 1802 1803 err = validate_linkmsg(dev, tb); 1804 if (err < 0) 1805 goto errout; 1806 1807 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 1808 errout: 1809 return err; 1810 } 1811 1812 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 1813 { 1814 struct net *net = sock_net(skb->sk); 1815 const struct rtnl_link_ops *ops; 1816 struct net_device *dev; 1817 struct ifinfomsg *ifm; 1818 char ifname[IFNAMSIZ]; 1819 struct nlattr *tb[IFLA_MAX+1]; 1820 int err; 1821 LIST_HEAD(list_kill); 1822 1823 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1824 if (err < 0) 1825 return err; 1826 1827 if (tb[IFLA_IFNAME]) 1828 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1829 1830 ifm = nlmsg_data(nlh); 1831 if (ifm->ifi_index > 0) 1832 dev = __dev_get_by_index(net, ifm->ifi_index); 1833 else if (tb[IFLA_IFNAME]) 1834 dev = __dev_get_by_name(net, ifname); 1835 else 1836 return -EINVAL; 1837 1838 if (!dev) 1839 return -ENODEV; 1840 1841 ops = dev->rtnl_link_ops; 1842 if (!ops || !ops->dellink) 1843 return -EOPNOTSUPP; 1844 1845 ops->dellink(dev, &list_kill); 1846 unregister_netdevice_many(&list_kill); 1847 return 0; 1848 } 1849 1850 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 1851 { 1852 unsigned int old_flags; 1853 int err; 1854 1855 old_flags = dev->flags; 1856 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 1857 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1858 if (err < 0) 1859 return err; 1860 } 1861 1862 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 1863 1864 __dev_notify_flags(dev, old_flags, ~0U); 1865 return 0; 1866 } 1867 EXPORT_SYMBOL(rtnl_configure_link); 1868 1869 struct net_device *rtnl_create_link(struct net *net, 1870 char *ifname, unsigned char name_assign_type, 1871 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 1872 { 1873 int err; 1874 struct net_device *dev; 1875 unsigned int num_tx_queues = 1; 1876 unsigned int num_rx_queues = 1; 1877 1878 if (tb[IFLA_NUM_TX_QUEUES]) 1879 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 1880 else if (ops->get_num_tx_queues) 1881 num_tx_queues = ops->get_num_tx_queues(); 1882 1883 if (tb[IFLA_NUM_RX_QUEUES]) 1884 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 1885 else if (ops->get_num_rx_queues) 1886 num_rx_queues = ops->get_num_rx_queues(); 1887 1888 err = -ENOMEM; 1889 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 1890 ops->setup, num_tx_queues, num_rx_queues); 1891 if (!dev) 1892 goto err; 1893 1894 dev_net_set(dev, net); 1895 dev->rtnl_link_ops = ops; 1896 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 1897 1898 if (tb[IFLA_MTU]) 1899 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1900 if (tb[IFLA_ADDRESS]) { 1901 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1902 nla_len(tb[IFLA_ADDRESS])); 1903 dev->addr_assign_type = NET_ADDR_SET; 1904 } 1905 if (tb[IFLA_BROADCAST]) 1906 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1907 nla_len(tb[IFLA_BROADCAST])); 1908 if (tb[IFLA_TXQLEN]) 1909 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1910 if (tb[IFLA_OPERSTATE]) 1911 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1912 if (tb[IFLA_LINKMODE]) 1913 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1914 if (tb[IFLA_GROUP]) 1915 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1916 1917 return dev; 1918 1919 err: 1920 return ERR_PTR(err); 1921 } 1922 EXPORT_SYMBOL(rtnl_create_link); 1923 1924 static int rtnl_group_changelink(const struct sk_buff *skb, 1925 struct net *net, int group, 1926 struct ifinfomsg *ifm, 1927 struct nlattr **tb) 1928 { 1929 struct net_device *dev; 1930 int err; 1931 1932 for_each_netdev(net, dev) { 1933 if (dev->group == group) { 1934 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 1935 if (err < 0) 1936 return err; 1937 } 1938 } 1939 1940 return 0; 1941 } 1942 1943 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 1944 { 1945 struct net *net = sock_net(skb->sk); 1946 const struct rtnl_link_ops *ops; 1947 const struct rtnl_link_ops *m_ops = NULL; 1948 struct net_device *dev; 1949 struct net_device *master_dev = NULL; 1950 struct ifinfomsg *ifm; 1951 char kind[MODULE_NAME_LEN]; 1952 char ifname[IFNAMSIZ]; 1953 struct nlattr *tb[IFLA_MAX+1]; 1954 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 1955 unsigned char name_assign_type = NET_NAME_USER; 1956 int err; 1957 1958 #ifdef CONFIG_MODULES 1959 replay: 1960 #endif 1961 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1962 if (err < 0) 1963 return err; 1964 1965 if (tb[IFLA_IFNAME]) 1966 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1967 else 1968 ifname[0] = '\0'; 1969 1970 ifm = nlmsg_data(nlh); 1971 if (ifm->ifi_index > 0) 1972 dev = __dev_get_by_index(net, ifm->ifi_index); 1973 else { 1974 if (ifname[0]) 1975 dev = __dev_get_by_name(net, ifname); 1976 else 1977 dev = NULL; 1978 } 1979 1980 if (dev) { 1981 master_dev = netdev_master_upper_dev_get(dev); 1982 if (master_dev) 1983 m_ops = master_dev->rtnl_link_ops; 1984 } 1985 1986 err = validate_linkmsg(dev, tb); 1987 if (err < 0) 1988 return err; 1989 1990 if (tb[IFLA_LINKINFO]) { 1991 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 1992 tb[IFLA_LINKINFO], ifla_info_policy); 1993 if (err < 0) 1994 return err; 1995 } else 1996 memset(linkinfo, 0, sizeof(linkinfo)); 1997 1998 if (linkinfo[IFLA_INFO_KIND]) { 1999 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2000 ops = rtnl_link_ops_get(kind); 2001 } else { 2002 kind[0] = '\0'; 2003 ops = NULL; 2004 } 2005 2006 if (1) { 2007 struct nlattr *attr[ops ? ops->maxtype + 1 : 0]; 2008 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 0]; 2009 struct nlattr **data = NULL; 2010 struct nlattr **slave_data = NULL; 2011 struct net *dest_net; 2012 2013 if (ops) { 2014 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2015 err = nla_parse_nested(attr, ops->maxtype, 2016 linkinfo[IFLA_INFO_DATA], 2017 ops->policy); 2018 if (err < 0) 2019 return err; 2020 data = attr; 2021 } 2022 if (ops->validate) { 2023 err = ops->validate(tb, data); 2024 if (err < 0) 2025 return err; 2026 } 2027 } 2028 2029 if (m_ops) { 2030 if (m_ops->slave_maxtype && 2031 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2032 err = nla_parse_nested(slave_attr, 2033 m_ops->slave_maxtype, 2034 linkinfo[IFLA_INFO_SLAVE_DATA], 2035 m_ops->slave_policy); 2036 if (err < 0) 2037 return err; 2038 slave_data = slave_attr; 2039 } 2040 if (m_ops->slave_validate) { 2041 err = m_ops->slave_validate(tb, slave_data); 2042 if (err < 0) 2043 return err; 2044 } 2045 } 2046 2047 if (dev) { 2048 int status = 0; 2049 2050 if (nlh->nlmsg_flags & NLM_F_EXCL) 2051 return -EEXIST; 2052 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2053 return -EOPNOTSUPP; 2054 2055 if (linkinfo[IFLA_INFO_DATA]) { 2056 if (!ops || ops != dev->rtnl_link_ops || 2057 !ops->changelink) 2058 return -EOPNOTSUPP; 2059 2060 err = ops->changelink(dev, tb, data); 2061 if (err < 0) 2062 return err; 2063 status |= DO_SETLINK_NOTIFY; 2064 } 2065 2066 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2067 if (!m_ops || !m_ops->slave_changelink) 2068 return -EOPNOTSUPP; 2069 2070 err = m_ops->slave_changelink(master_dev, dev, 2071 tb, slave_data); 2072 if (err < 0) 2073 return err; 2074 status |= DO_SETLINK_NOTIFY; 2075 } 2076 2077 return do_setlink(skb, dev, ifm, tb, ifname, status); 2078 } 2079 2080 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2081 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2082 return rtnl_group_changelink(skb, net, 2083 nla_get_u32(tb[IFLA_GROUP]), 2084 ifm, tb); 2085 return -ENODEV; 2086 } 2087 2088 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2089 return -EOPNOTSUPP; 2090 2091 if (!ops) { 2092 #ifdef CONFIG_MODULES 2093 if (kind[0]) { 2094 __rtnl_unlock(); 2095 request_module("rtnl-link-%s", kind); 2096 rtnl_lock(); 2097 ops = rtnl_link_ops_get(kind); 2098 if (ops) 2099 goto replay; 2100 } 2101 #endif 2102 return -EOPNOTSUPP; 2103 } 2104 2105 if (!ops->setup) 2106 return -EOPNOTSUPP; 2107 2108 if (!ifname[0]) { 2109 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2110 name_assign_type = NET_NAME_ENUM; 2111 } 2112 2113 dest_net = rtnl_link_get_net(net, tb); 2114 if (IS_ERR(dest_net)) 2115 return PTR_ERR(dest_net); 2116 2117 dev = rtnl_create_link(dest_net, ifname, name_assign_type, ops, tb); 2118 if (IS_ERR(dev)) { 2119 err = PTR_ERR(dev); 2120 goto out; 2121 } 2122 2123 dev->ifindex = ifm->ifi_index; 2124 2125 if (ops->newlink) { 2126 err = ops->newlink(net, dev, tb, data); 2127 /* Drivers should call free_netdev() in ->destructor 2128 * and unregister it on failure after registration 2129 * so that device could be finally freed in rtnl_unlock. 2130 */ 2131 if (err < 0) { 2132 /* If device is not registered at all, free it now */ 2133 if (dev->reg_state == NETREG_UNINITIALIZED) 2134 free_netdev(dev); 2135 goto out; 2136 } 2137 } else { 2138 err = register_netdevice(dev); 2139 if (err < 0) { 2140 free_netdev(dev); 2141 goto out; 2142 } 2143 } 2144 err = rtnl_configure_link(dev, ifm); 2145 if (err < 0) 2146 unregister_netdevice(dev); 2147 out: 2148 put_net(dest_net); 2149 return err; 2150 } 2151 } 2152 2153 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2154 { 2155 struct net *net = sock_net(skb->sk); 2156 struct ifinfomsg *ifm; 2157 char ifname[IFNAMSIZ]; 2158 struct nlattr *tb[IFLA_MAX+1]; 2159 struct net_device *dev = NULL; 2160 struct sk_buff *nskb; 2161 int err; 2162 u32 ext_filter_mask = 0; 2163 2164 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2165 if (err < 0) 2166 return err; 2167 2168 if (tb[IFLA_IFNAME]) 2169 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2170 2171 if (tb[IFLA_EXT_MASK]) 2172 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2173 2174 ifm = nlmsg_data(nlh); 2175 if (ifm->ifi_index > 0) 2176 dev = __dev_get_by_index(net, ifm->ifi_index); 2177 else if (tb[IFLA_IFNAME]) 2178 dev = __dev_get_by_name(net, ifname); 2179 else 2180 return -EINVAL; 2181 2182 if (dev == NULL) 2183 return -ENODEV; 2184 2185 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2186 if (nskb == NULL) 2187 return -ENOBUFS; 2188 2189 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2190 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2191 if (err < 0) { 2192 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2193 WARN_ON(err == -EMSGSIZE); 2194 kfree_skb(nskb); 2195 } else 2196 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2197 2198 return err; 2199 } 2200 2201 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2202 { 2203 struct net *net = sock_net(skb->sk); 2204 struct net_device *dev; 2205 struct nlattr *tb[IFLA_MAX+1]; 2206 u32 ext_filter_mask = 0; 2207 u16 min_ifinfo_dump_size = 0; 2208 int hdrlen; 2209 2210 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2211 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2212 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2213 2214 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2215 if (tb[IFLA_EXT_MASK]) 2216 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2217 } 2218 2219 if (!ext_filter_mask) 2220 return NLMSG_GOODSIZE; 2221 /* 2222 * traverse the list of net devices and compute the minimum 2223 * buffer size based upon the filter mask. 2224 */ 2225 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2226 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2227 if_nlmsg_size(dev, 2228 ext_filter_mask)); 2229 } 2230 2231 return min_ifinfo_dump_size; 2232 } 2233 2234 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2235 { 2236 int idx; 2237 int s_idx = cb->family; 2238 2239 if (s_idx == 0) 2240 s_idx = 1; 2241 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2242 int type = cb->nlh->nlmsg_type-RTM_BASE; 2243 if (idx < s_idx || idx == PF_PACKET) 2244 continue; 2245 if (rtnl_msg_handlers[idx] == NULL || 2246 rtnl_msg_handlers[idx][type].dumpit == NULL) 2247 continue; 2248 if (idx > s_idx) { 2249 memset(&cb->args[0], 0, sizeof(cb->args)); 2250 cb->prev_seq = 0; 2251 cb->seq = 0; 2252 } 2253 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2254 break; 2255 } 2256 cb->family = idx; 2257 2258 return skb->len; 2259 } 2260 2261 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2262 unsigned int change, gfp_t flags) 2263 { 2264 struct net *net = dev_net(dev); 2265 struct sk_buff *skb; 2266 int err = -ENOBUFS; 2267 size_t if_info_size; 2268 2269 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2270 if (skb == NULL) 2271 goto errout; 2272 2273 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2274 if (err < 0) { 2275 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2276 WARN_ON(err == -EMSGSIZE); 2277 kfree_skb(skb); 2278 goto errout; 2279 } 2280 return skb; 2281 errout: 2282 if (err < 0) 2283 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2284 return NULL; 2285 } 2286 2287 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2288 { 2289 struct net *net = dev_net(dev); 2290 2291 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2292 } 2293 2294 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2295 gfp_t flags) 2296 { 2297 struct sk_buff *skb; 2298 2299 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2300 if (skb) 2301 rtmsg_ifinfo_send(skb, dev, flags); 2302 } 2303 EXPORT_SYMBOL(rtmsg_ifinfo); 2304 2305 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2306 struct net_device *dev, 2307 u8 *addr, u32 pid, u32 seq, 2308 int type, unsigned int flags, 2309 int nlflags) 2310 { 2311 struct nlmsghdr *nlh; 2312 struct ndmsg *ndm; 2313 2314 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2315 if (!nlh) 2316 return -EMSGSIZE; 2317 2318 ndm = nlmsg_data(nlh); 2319 ndm->ndm_family = AF_BRIDGE; 2320 ndm->ndm_pad1 = 0; 2321 ndm->ndm_pad2 = 0; 2322 ndm->ndm_flags = flags; 2323 ndm->ndm_type = 0; 2324 ndm->ndm_ifindex = dev->ifindex; 2325 ndm->ndm_state = NUD_PERMANENT; 2326 2327 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2328 goto nla_put_failure; 2329 2330 nlmsg_end(skb, nlh); 2331 return 0; 2332 2333 nla_put_failure: 2334 nlmsg_cancel(skb, nlh); 2335 return -EMSGSIZE; 2336 } 2337 2338 static inline size_t rtnl_fdb_nlmsg_size(void) 2339 { 2340 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2341 } 2342 2343 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type) 2344 { 2345 struct net *net = dev_net(dev); 2346 struct sk_buff *skb; 2347 int err = -ENOBUFS; 2348 2349 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2350 if (!skb) 2351 goto errout; 2352 2353 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0); 2354 if (err < 0) { 2355 kfree_skb(skb); 2356 goto errout; 2357 } 2358 2359 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2360 return; 2361 errout: 2362 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2363 } 2364 2365 /** 2366 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2367 */ 2368 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2369 struct nlattr *tb[], 2370 struct net_device *dev, 2371 const unsigned char *addr, u16 vid, 2372 u16 flags) 2373 { 2374 int err = -EINVAL; 2375 2376 /* If aging addresses are supported device will need to 2377 * implement its own handler for this. 2378 */ 2379 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2380 pr_info("%s: FDB only supports static addresses\n", dev->name); 2381 return err; 2382 } 2383 2384 if (vid) { 2385 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2386 return err; 2387 } 2388 2389 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2390 err = dev_uc_add_excl(dev, addr); 2391 else if (is_multicast_ether_addr(addr)) 2392 err = dev_mc_add_excl(dev, addr); 2393 2394 /* Only return duplicate errors if NLM_F_EXCL is set */ 2395 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2396 err = 0; 2397 2398 return err; 2399 } 2400 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2401 2402 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2403 { 2404 u16 vid = 0; 2405 2406 if (vlan_attr) { 2407 if (nla_len(vlan_attr) != sizeof(u16)) { 2408 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2409 return -EINVAL; 2410 } 2411 2412 vid = nla_get_u16(vlan_attr); 2413 2414 if (!vid || vid >= VLAN_VID_MASK) { 2415 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2416 vid); 2417 return -EINVAL; 2418 } 2419 } 2420 *p_vid = vid; 2421 return 0; 2422 } 2423 2424 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2425 { 2426 struct net *net = sock_net(skb->sk); 2427 struct ndmsg *ndm; 2428 struct nlattr *tb[NDA_MAX+1]; 2429 struct net_device *dev; 2430 u8 *addr; 2431 u16 vid; 2432 int err; 2433 2434 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2435 if (err < 0) 2436 return err; 2437 2438 ndm = nlmsg_data(nlh); 2439 if (ndm->ndm_ifindex == 0) { 2440 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2441 return -EINVAL; 2442 } 2443 2444 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2445 if (dev == NULL) { 2446 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2447 return -ENODEV; 2448 } 2449 2450 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2451 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2452 return -EINVAL; 2453 } 2454 2455 addr = nla_data(tb[NDA_LLADDR]); 2456 2457 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2458 if (err) 2459 return err; 2460 2461 err = -EOPNOTSUPP; 2462 2463 /* Support fdb on master device the net/bridge default case */ 2464 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2465 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2466 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2467 const struct net_device_ops *ops = br_dev->netdev_ops; 2468 2469 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2470 nlh->nlmsg_flags); 2471 if (err) 2472 goto out; 2473 else 2474 ndm->ndm_flags &= ~NTF_MASTER; 2475 } 2476 2477 /* Embedded bridge, macvlan, and any other device support */ 2478 if ((ndm->ndm_flags & NTF_SELF)) { 2479 if (dev->netdev_ops->ndo_fdb_add) 2480 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 2481 vid, 2482 nlh->nlmsg_flags); 2483 else 2484 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 2485 nlh->nlmsg_flags); 2486 2487 if (!err) { 2488 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH); 2489 ndm->ndm_flags &= ~NTF_SELF; 2490 } 2491 } 2492 out: 2493 return err; 2494 } 2495 2496 /** 2497 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 2498 */ 2499 int ndo_dflt_fdb_del(struct ndmsg *ndm, 2500 struct nlattr *tb[], 2501 struct net_device *dev, 2502 const unsigned char *addr, u16 vid) 2503 { 2504 int err = -EINVAL; 2505 2506 /* If aging addresses are supported device will need to 2507 * implement its own handler for this. 2508 */ 2509 if (!(ndm->ndm_state & NUD_PERMANENT)) { 2510 pr_info("%s: FDB only supports static addresses\n", dev->name); 2511 return err; 2512 } 2513 2514 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2515 err = dev_uc_del(dev, addr); 2516 else if (is_multicast_ether_addr(addr)) 2517 err = dev_mc_del(dev, addr); 2518 2519 return err; 2520 } 2521 EXPORT_SYMBOL(ndo_dflt_fdb_del); 2522 2523 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 2524 { 2525 struct net *net = sock_net(skb->sk); 2526 struct ndmsg *ndm; 2527 struct nlattr *tb[NDA_MAX+1]; 2528 struct net_device *dev; 2529 int err = -EINVAL; 2530 __u8 *addr; 2531 u16 vid; 2532 2533 if (!netlink_capable(skb, CAP_NET_ADMIN)) 2534 return -EPERM; 2535 2536 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2537 if (err < 0) 2538 return err; 2539 2540 ndm = nlmsg_data(nlh); 2541 if (ndm->ndm_ifindex == 0) { 2542 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2543 return -EINVAL; 2544 } 2545 2546 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2547 if (dev == NULL) { 2548 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2549 return -ENODEV; 2550 } 2551 2552 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2553 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 2554 return -EINVAL; 2555 } 2556 2557 addr = nla_data(tb[NDA_LLADDR]); 2558 2559 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2560 if (err) 2561 return err; 2562 2563 err = -EOPNOTSUPP; 2564 2565 /* Support fdb on master device the net/bridge default case */ 2566 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2567 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2568 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2569 const struct net_device_ops *ops = br_dev->netdev_ops; 2570 2571 if (ops->ndo_fdb_del) 2572 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 2573 2574 if (err) 2575 goto out; 2576 else 2577 ndm->ndm_flags &= ~NTF_MASTER; 2578 } 2579 2580 /* Embedded bridge, macvlan, and any other device support */ 2581 if (ndm->ndm_flags & NTF_SELF) { 2582 if (dev->netdev_ops->ndo_fdb_del) 2583 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 2584 vid); 2585 else 2586 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 2587 2588 if (!err) { 2589 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH); 2590 ndm->ndm_flags &= ~NTF_SELF; 2591 } 2592 } 2593 out: 2594 return err; 2595 } 2596 2597 static int nlmsg_populate_fdb(struct sk_buff *skb, 2598 struct netlink_callback *cb, 2599 struct net_device *dev, 2600 int *idx, 2601 struct netdev_hw_addr_list *list) 2602 { 2603 struct netdev_hw_addr *ha; 2604 int err; 2605 u32 portid, seq; 2606 2607 portid = NETLINK_CB(cb->skb).portid; 2608 seq = cb->nlh->nlmsg_seq; 2609 2610 list_for_each_entry(ha, &list->list, list) { 2611 if (*idx < cb->args[0]) 2612 goto skip; 2613 2614 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 2615 portid, seq, 2616 RTM_NEWNEIGH, NTF_SELF, 2617 NLM_F_MULTI); 2618 if (err < 0) 2619 return err; 2620 skip: 2621 *idx += 1; 2622 } 2623 return 0; 2624 } 2625 2626 /** 2627 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2628 * @nlh: netlink message header 2629 * @dev: netdevice 2630 * 2631 * Default netdevice operation to dump the existing unicast address list. 2632 * Returns number of addresses from list put in skb. 2633 */ 2634 int ndo_dflt_fdb_dump(struct sk_buff *skb, 2635 struct netlink_callback *cb, 2636 struct net_device *dev, 2637 struct net_device *filter_dev, 2638 int idx) 2639 { 2640 int err; 2641 2642 netif_addr_lock_bh(dev); 2643 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 2644 if (err) 2645 goto out; 2646 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 2647 out: 2648 netif_addr_unlock_bh(dev); 2649 return idx; 2650 } 2651 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 2652 2653 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 2654 { 2655 struct net_device *dev; 2656 struct nlattr *tb[IFLA_MAX+1]; 2657 struct net_device *bdev = NULL; 2658 struct net_device *br_dev = NULL; 2659 const struct net_device_ops *ops = NULL; 2660 const struct net_device_ops *cops = NULL; 2661 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 2662 struct net *net = sock_net(skb->sk); 2663 int brport_idx = 0; 2664 int br_idx = 0; 2665 int idx = 0; 2666 2667 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 2668 ifla_policy) == 0) { 2669 if (tb[IFLA_MASTER]) 2670 br_idx = nla_get_u32(tb[IFLA_MASTER]); 2671 } 2672 2673 brport_idx = ifm->ifi_index; 2674 2675 if (br_idx) { 2676 br_dev = __dev_get_by_index(net, br_idx); 2677 if (!br_dev) 2678 return -ENODEV; 2679 2680 ops = br_dev->netdev_ops; 2681 bdev = br_dev; 2682 } 2683 2684 for_each_netdev(net, dev) { 2685 if (brport_idx && (dev->ifindex != brport_idx)) 2686 continue; 2687 2688 if (!br_idx) { /* user did not specify a specific bridge */ 2689 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2690 br_dev = netdev_master_upper_dev_get(dev); 2691 cops = br_dev->netdev_ops; 2692 } 2693 2694 bdev = dev; 2695 } else { 2696 if (dev != br_dev && 2697 !(dev->priv_flags & IFF_BRIDGE_PORT)) 2698 continue; 2699 2700 if (br_dev != netdev_master_upper_dev_get(dev) && 2701 !(dev->priv_flags & IFF_EBRIDGE)) 2702 continue; 2703 2704 bdev = br_dev; 2705 cops = ops; 2706 } 2707 2708 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2709 if (cops && cops->ndo_fdb_dump) 2710 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev, 2711 idx); 2712 } 2713 2714 if (dev->netdev_ops->ndo_fdb_dump) 2715 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL, 2716 idx); 2717 else 2718 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); 2719 2720 cops = NULL; 2721 } 2722 2723 cb->args[0] = idx; 2724 return skb->len; 2725 } 2726 2727 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 2728 unsigned int attrnum, unsigned int flag) 2729 { 2730 if (mask & flag) 2731 return nla_put_u8(skb, attrnum, !!(flags & flag)); 2732 return 0; 2733 } 2734 2735 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 2736 struct net_device *dev, u16 mode, 2737 u32 flags, u32 mask) 2738 { 2739 struct nlmsghdr *nlh; 2740 struct ifinfomsg *ifm; 2741 struct nlattr *br_afspec; 2742 struct nlattr *protinfo; 2743 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 2744 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2745 2746 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI); 2747 if (nlh == NULL) 2748 return -EMSGSIZE; 2749 2750 ifm = nlmsg_data(nlh); 2751 ifm->ifi_family = AF_BRIDGE; 2752 ifm->__ifi_pad = 0; 2753 ifm->ifi_type = dev->type; 2754 ifm->ifi_index = dev->ifindex; 2755 ifm->ifi_flags = dev_get_flags(dev); 2756 ifm->ifi_change = 0; 2757 2758 2759 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 2760 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 2761 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 2762 (br_dev && 2763 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 2764 (dev->addr_len && 2765 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 2766 (dev->ifindex != dev->iflink && 2767 nla_put_u32(skb, IFLA_LINK, dev->iflink))) 2768 goto nla_put_failure; 2769 2770 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 2771 if (!br_afspec) 2772 goto nla_put_failure; 2773 2774 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 2775 nla_nest_cancel(skb, br_afspec); 2776 goto nla_put_failure; 2777 } 2778 2779 if (mode != BRIDGE_MODE_UNDEF) { 2780 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 2781 nla_nest_cancel(skb, br_afspec); 2782 goto nla_put_failure; 2783 } 2784 } 2785 nla_nest_end(skb, br_afspec); 2786 2787 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 2788 if (!protinfo) 2789 goto nla_put_failure; 2790 2791 if (brport_nla_put_flag(skb, flags, mask, 2792 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 2793 brport_nla_put_flag(skb, flags, mask, 2794 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 2795 brport_nla_put_flag(skb, flags, mask, 2796 IFLA_BRPORT_FAST_LEAVE, 2797 BR_MULTICAST_FAST_LEAVE) || 2798 brport_nla_put_flag(skb, flags, mask, 2799 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 2800 brport_nla_put_flag(skb, flags, mask, 2801 IFLA_BRPORT_LEARNING, BR_LEARNING) || 2802 brport_nla_put_flag(skb, flags, mask, 2803 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 2804 brport_nla_put_flag(skb, flags, mask, 2805 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 2806 brport_nla_put_flag(skb, flags, mask, 2807 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 2808 nla_nest_cancel(skb, protinfo); 2809 goto nla_put_failure; 2810 } 2811 2812 nla_nest_end(skb, protinfo); 2813 2814 nlmsg_end(skb, nlh); 2815 return 0; 2816 nla_put_failure: 2817 nlmsg_cancel(skb, nlh); 2818 return -EMSGSIZE; 2819 } 2820 EXPORT_SYMBOL(ndo_dflt_bridge_getlink); 2821 2822 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 2823 { 2824 struct net *net = sock_net(skb->sk); 2825 struct net_device *dev; 2826 int idx = 0; 2827 u32 portid = NETLINK_CB(cb->skb).portid; 2828 u32 seq = cb->nlh->nlmsg_seq; 2829 u32 filter_mask = 0; 2830 2831 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 2832 struct nlattr *extfilt; 2833 2834 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 2835 IFLA_EXT_MASK); 2836 if (extfilt) { 2837 if (nla_len(extfilt) < sizeof(filter_mask)) 2838 return -EINVAL; 2839 2840 filter_mask = nla_get_u32(extfilt); 2841 } 2842 } 2843 2844 rcu_read_lock(); 2845 for_each_netdev_rcu(net, dev) { 2846 const struct net_device_ops *ops = dev->netdev_ops; 2847 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2848 2849 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 2850 if (idx >= cb->args[0] && 2851 br_dev->netdev_ops->ndo_bridge_getlink( 2852 skb, portid, seq, dev, filter_mask) < 0) 2853 break; 2854 idx++; 2855 } 2856 2857 if (ops->ndo_bridge_getlink) { 2858 if (idx >= cb->args[0] && 2859 ops->ndo_bridge_getlink(skb, portid, seq, dev, 2860 filter_mask) < 0) 2861 break; 2862 idx++; 2863 } 2864 } 2865 rcu_read_unlock(); 2866 cb->args[0] = idx; 2867 2868 return skb->len; 2869 } 2870 2871 static inline size_t bridge_nlmsg_size(void) 2872 { 2873 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 2874 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 2875 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 2876 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 2877 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 2878 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 2879 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 2880 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 2881 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 2882 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 2883 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 2884 } 2885 2886 static int rtnl_bridge_notify(struct net_device *dev) 2887 { 2888 struct net *net = dev_net(dev); 2889 struct sk_buff *skb; 2890 int err = -EOPNOTSUPP; 2891 2892 if (!dev->netdev_ops->ndo_bridge_getlink) 2893 return 0; 2894 2895 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 2896 if (!skb) { 2897 err = -ENOMEM; 2898 goto errout; 2899 } 2900 2901 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0); 2902 if (err < 0) 2903 goto errout; 2904 2905 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 2906 return 0; 2907 errout: 2908 WARN_ON(err == -EMSGSIZE); 2909 kfree_skb(skb); 2910 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2911 return err; 2912 } 2913 2914 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2915 { 2916 struct net *net = sock_net(skb->sk); 2917 struct ifinfomsg *ifm; 2918 struct net_device *dev; 2919 struct nlattr *br_spec, *attr = NULL; 2920 int rem, err = -EOPNOTSUPP; 2921 u16 oflags, flags = 0; 2922 bool have_flags = false; 2923 2924 if (nlmsg_len(nlh) < sizeof(*ifm)) 2925 return -EINVAL; 2926 2927 ifm = nlmsg_data(nlh); 2928 if (ifm->ifi_family != AF_BRIDGE) 2929 return -EPFNOSUPPORT; 2930 2931 dev = __dev_get_by_index(net, ifm->ifi_index); 2932 if (!dev) { 2933 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 2934 return -ENODEV; 2935 } 2936 2937 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 2938 if (br_spec) { 2939 nla_for_each_nested(attr, br_spec, rem) { 2940 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 2941 if (nla_len(attr) < sizeof(flags)) 2942 return -EINVAL; 2943 2944 have_flags = true; 2945 flags = nla_get_u16(attr); 2946 break; 2947 } 2948 } 2949 } 2950 2951 oflags = flags; 2952 2953 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 2954 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2955 2956 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 2957 err = -EOPNOTSUPP; 2958 goto out; 2959 } 2960 2961 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh); 2962 if (err) 2963 goto out; 2964 2965 flags &= ~BRIDGE_FLAGS_MASTER; 2966 } 2967 2968 if ((flags & BRIDGE_FLAGS_SELF)) { 2969 if (!dev->netdev_ops->ndo_bridge_setlink) 2970 err = -EOPNOTSUPP; 2971 else 2972 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh); 2973 if (!err) { 2974 flags &= ~BRIDGE_FLAGS_SELF; 2975 2976 /* Generate event to notify upper layer of bridge 2977 * change 2978 */ 2979 err = rtnl_bridge_notify(dev); 2980 } 2981 } 2982 2983 if (have_flags) 2984 memcpy(nla_data(attr), &flags, sizeof(flags)); 2985 out: 2986 return err; 2987 } 2988 2989 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2990 { 2991 struct net *net = sock_net(skb->sk); 2992 struct ifinfomsg *ifm; 2993 struct net_device *dev; 2994 struct nlattr *br_spec, *attr = NULL; 2995 int rem, err = -EOPNOTSUPP; 2996 u16 oflags, flags = 0; 2997 bool have_flags = false; 2998 2999 if (nlmsg_len(nlh) < sizeof(*ifm)) 3000 return -EINVAL; 3001 3002 ifm = nlmsg_data(nlh); 3003 if (ifm->ifi_family != AF_BRIDGE) 3004 return -EPFNOSUPPORT; 3005 3006 dev = __dev_get_by_index(net, ifm->ifi_index); 3007 if (!dev) { 3008 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3009 return -ENODEV; 3010 } 3011 3012 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3013 if (br_spec) { 3014 nla_for_each_nested(attr, br_spec, rem) { 3015 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3016 if (nla_len(attr) < sizeof(flags)) 3017 return -EINVAL; 3018 3019 have_flags = true; 3020 flags = nla_get_u16(attr); 3021 break; 3022 } 3023 } 3024 } 3025 3026 oflags = flags; 3027 3028 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3029 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3030 3031 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3032 err = -EOPNOTSUPP; 3033 goto out; 3034 } 3035 3036 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh); 3037 if (err) 3038 goto out; 3039 3040 flags &= ~BRIDGE_FLAGS_MASTER; 3041 } 3042 3043 if ((flags & BRIDGE_FLAGS_SELF)) { 3044 if (!dev->netdev_ops->ndo_bridge_dellink) 3045 err = -EOPNOTSUPP; 3046 else 3047 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh); 3048 3049 if (!err) { 3050 flags &= ~BRIDGE_FLAGS_SELF; 3051 3052 /* Generate event to notify upper layer of bridge 3053 * change 3054 */ 3055 err = rtnl_bridge_notify(dev); 3056 } 3057 } 3058 3059 if (have_flags) 3060 memcpy(nla_data(attr), &flags, sizeof(flags)); 3061 out: 3062 return err; 3063 } 3064 3065 /* Process one rtnetlink message. */ 3066 3067 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3068 { 3069 struct net *net = sock_net(skb->sk); 3070 rtnl_doit_func doit; 3071 int sz_idx, kind; 3072 int family; 3073 int type; 3074 int err; 3075 3076 type = nlh->nlmsg_type; 3077 if (type > RTM_MAX) 3078 return -EOPNOTSUPP; 3079 3080 type -= RTM_BASE; 3081 3082 /* All the messages must have at least 1 byte length */ 3083 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3084 return 0; 3085 3086 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3087 sz_idx = type>>2; 3088 kind = type&3; 3089 3090 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 3091 return -EPERM; 3092 3093 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 3094 struct sock *rtnl; 3095 rtnl_dumpit_func dumpit; 3096 rtnl_calcit_func calcit; 3097 u16 min_dump_alloc = 0; 3098 3099 dumpit = rtnl_get_dumpit(family, type); 3100 if (dumpit == NULL) 3101 return -EOPNOTSUPP; 3102 calcit = rtnl_get_calcit(family, type); 3103 if (calcit) 3104 min_dump_alloc = calcit(skb, nlh); 3105 3106 __rtnl_unlock(); 3107 rtnl = net->rtnl; 3108 { 3109 struct netlink_dump_control c = { 3110 .dump = dumpit, 3111 .min_dump_alloc = min_dump_alloc, 3112 }; 3113 err = netlink_dump_start(rtnl, skb, nlh, &c); 3114 } 3115 rtnl_lock(); 3116 return err; 3117 } 3118 3119 doit = rtnl_get_doit(family, type); 3120 if (doit == NULL) 3121 return -EOPNOTSUPP; 3122 3123 return doit(skb, nlh); 3124 } 3125 3126 static void rtnetlink_rcv(struct sk_buff *skb) 3127 { 3128 rtnl_lock(); 3129 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 3130 rtnl_unlock(); 3131 } 3132 3133 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 3134 { 3135 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3136 3137 switch (event) { 3138 case NETDEV_UP: 3139 case NETDEV_DOWN: 3140 case NETDEV_PRE_UP: 3141 case NETDEV_POST_INIT: 3142 case NETDEV_REGISTER: 3143 case NETDEV_CHANGE: 3144 case NETDEV_PRE_TYPE_CHANGE: 3145 case NETDEV_GOING_DOWN: 3146 case NETDEV_UNREGISTER: 3147 case NETDEV_UNREGISTER_FINAL: 3148 case NETDEV_RELEASE: 3149 case NETDEV_JOIN: 3150 break; 3151 default: 3152 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 3153 break; 3154 } 3155 return NOTIFY_DONE; 3156 } 3157 3158 static struct notifier_block rtnetlink_dev_notifier = { 3159 .notifier_call = rtnetlink_event, 3160 }; 3161 3162 3163 static int __net_init rtnetlink_net_init(struct net *net) 3164 { 3165 struct sock *sk; 3166 struct netlink_kernel_cfg cfg = { 3167 .groups = RTNLGRP_MAX, 3168 .input = rtnetlink_rcv, 3169 .cb_mutex = &rtnl_mutex, 3170 .flags = NL_CFG_F_NONROOT_RECV, 3171 }; 3172 3173 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 3174 if (!sk) 3175 return -ENOMEM; 3176 net->rtnl = sk; 3177 return 0; 3178 } 3179 3180 static void __net_exit rtnetlink_net_exit(struct net *net) 3181 { 3182 netlink_kernel_release(net->rtnl); 3183 net->rtnl = NULL; 3184 } 3185 3186 static struct pernet_operations rtnetlink_net_ops = { 3187 .init = rtnetlink_net_init, 3188 .exit = rtnetlink_net_exit, 3189 }; 3190 3191 void __init rtnetlink_init(void) 3192 { 3193 if (register_pernet_subsys(&rtnetlink_net_ops)) 3194 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 3195 3196 register_netdevice_notifier(&rtnetlink_dev_notifier); 3197 3198 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 3199 rtnl_dump_ifinfo, rtnl_calcit); 3200 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 3201 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 3202 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 3203 3204 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 3205 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 3206 3207 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 3208 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 3209 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 3210 3211 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 3212 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 3213 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 3214 } 3215 3216