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(4) /* IFLA_LINK_NETNSID */ 879 + nla_total_size(ext_filter_mask 880 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 881 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 882 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 883 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 884 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */ 885 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 886 + nla_total_size(MAX_PHYS_ITEM_ID_LEN); /* IFLA_PHYS_SWITCH_ID */ 887 } 888 889 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 890 { 891 struct nlattr *vf_ports; 892 struct nlattr *vf_port; 893 int vf; 894 int err; 895 896 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 897 if (!vf_ports) 898 return -EMSGSIZE; 899 900 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 901 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 902 if (!vf_port) 903 goto nla_put_failure; 904 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 905 goto nla_put_failure; 906 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 907 if (err == -EMSGSIZE) 908 goto nla_put_failure; 909 if (err) { 910 nla_nest_cancel(skb, vf_port); 911 continue; 912 } 913 nla_nest_end(skb, vf_port); 914 } 915 916 nla_nest_end(skb, vf_ports); 917 918 return 0; 919 920 nla_put_failure: 921 nla_nest_cancel(skb, vf_ports); 922 return -EMSGSIZE; 923 } 924 925 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 926 { 927 struct nlattr *port_self; 928 int err; 929 930 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 931 if (!port_self) 932 return -EMSGSIZE; 933 934 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 935 if (err) { 936 nla_nest_cancel(skb, port_self); 937 return (err == -EMSGSIZE) ? err : 0; 938 } 939 940 nla_nest_end(skb, port_self); 941 942 return 0; 943 } 944 945 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 946 u32 ext_filter_mask) 947 { 948 int err; 949 950 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 951 !(ext_filter_mask & RTEXT_FILTER_VF)) 952 return 0; 953 954 err = rtnl_port_self_fill(skb, dev); 955 if (err) 956 return err; 957 958 if (dev_num_vf(dev->dev.parent)) { 959 err = rtnl_vf_ports_fill(skb, dev); 960 if (err) 961 return err; 962 } 963 964 return 0; 965 } 966 967 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 968 { 969 int err; 970 struct netdev_phys_item_id ppid; 971 972 err = dev_get_phys_port_id(dev, &ppid); 973 if (err) { 974 if (err == -EOPNOTSUPP) 975 return 0; 976 return err; 977 } 978 979 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 980 return -EMSGSIZE; 981 982 return 0; 983 } 984 985 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 986 { 987 int err; 988 struct netdev_phys_item_id psid; 989 990 err = netdev_switch_parent_id_get(dev, &psid); 991 if (err) { 992 if (err == -EOPNOTSUPP) 993 return 0; 994 return err; 995 } 996 997 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, psid.id_len, psid.id)) 998 return -EMSGSIZE; 999 1000 return 0; 1001 } 1002 1003 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1004 int type, u32 pid, u32 seq, u32 change, 1005 unsigned int flags, u32 ext_filter_mask) 1006 { 1007 struct ifinfomsg *ifm; 1008 struct nlmsghdr *nlh; 1009 struct rtnl_link_stats64 temp; 1010 const struct rtnl_link_stats64 *stats; 1011 struct nlattr *attr, *af_spec; 1012 struct rtnl_af_ops *af_ops; 1013 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1014 1015 ASSERT_RTNL(); 1016 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1017 if (nlh == NULL) 1018 return -EMSGSIZE; 1019 1020 ifm = nlmsg_data(nlh); 1021 ifm->ifi_family = AF_UNSPEC; 1022 ifm->__ifi_pad = 0; 1023 ifm->ifi_type = dev->type; 1024 ifm->ifi_index = dev->ifindex; 1025 ifm->ifi_flags = dev_get_flags(dev); 1026 ifm->ifi_change = change; 1027 1028 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1029 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1030 nla_put_u8(skb, IFLA_OPERSTATE, 1031 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1032 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1033 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1034 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1035 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1036 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1037 #ifdef CONFIG_RPS 1038 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1039 #endif 1040 (dev->ifindex != dev->iflink && 1041 nla_put_u32(skb, IFLA_LINK, dev->iflink)) || 1042 (upper_dev && 1043 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1044 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1045 (dev->qdisc && 1046 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1047 (dev->ifalias && 1048 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1049 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1050 atomic_read(&dev->carrier_changes))) 1051 goto nla_put_failure; 1052 1053 if (1) { 1054 struct rtnl_link_ifmap map = { 1055 .mem_start = dev->mem_start, 1056 .mem_end = dev->mem_end, 1057 .base_addr = dev->base_addr, 1058 .irq = dev->irq, 1059 .dma = dev->dma, 1060 .port = dev->if_port, 1061 }; 1062 if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) 1063 goto nla_put_failure; 1064 } 1065 1066 if (dev->addr_len) { 1067 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1068 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1069 goto nla_put_failure; 1070 } 1071 1072 if (rtnl_phys_port_id_fill(skb, dev)) 1073 goto nla_put_failure; 1074 1075 if (rtnl_phys_switch_id_fill(skb, dev)) 1076 goto nla_put_failure; 1077 1078 attr = nla_reserve(skb, IFLA_STATS, 1079 sizeof(struct rtnl_link_stats)); 1080 if (attr == NULL) 1081 goto nla_put_failure; 1082 1083 stats = dev_get_stats(dev, &temp); 1084 copy_rtnl_link_stats(nla_data(attr), stats); 1085 1086 attr = nla_reserve(skb, IFLA_STATS64, 1087 sizeof(struct rtnl_link_stats64)); 1088 if (attr == NULL) 1089 goto nla_put_failure; 1090 copy_rtnl_link_stats64(nla_data(attr), stats); 1091 1092 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1093 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1094 goto nla_put_failure; 1095 1096 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent 1097 && (ext_filter_mask & RTEXT_FILTER_VF)) { 1098 int i; 1099 1100 struct nlattr *vfinfo, *vf; 1101 int num_vfs = dev_num_vf(dev->dev.parent); 1102 1103 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1104 if (!vfinfo) 1105 goto nla_put_failure; 1106 for (i = 0; i < num_vfs; i++) { 1107 struct ifla_vf_info ivi; 1108 struct ifla_vf_mac vf_mac; 1109 struct ifla_vf_vlan vf_vlan; 1110 struct ifla_vf_rate vf_rate; 1111 struct ifla_vf_tx_rate vf_tx_rate; 1112 struct ifla_vf_spoofchk vf_spoofchk; 1113 struct ifla_vf_link_state vf_linkstate; 1114 1115 /* 1116 * Not all SR-IOV capable drivers support the 1117 * spoofcheck query. Preset to -1 so the user 1118 * space tool can detect that the driver didn't 1119 * report anything. 1120 */ 1121 ivi.spoofchk = -1; 1122 memset(ivi.mac, 0, sizeof(ivi.mac)); 1123 /* The default value for VF link state is "auto" 1124 * IFLA_VF_LINK_STATE_AUTO which equals zero 1125 */ 1126 ivi.linkstate = 0; 1127 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) 1128 break; 1129 vf_mac.vf = 1130 vf_vlan.vf = 1131 vf_rate.vf = 1132 vf_tx_rate.vf = 1133 vf_spoofchk.vf = 1134 vf_linkstate.vf = ivi.vf; 1135 1136 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1137 vf_vlan.vlan = ivi.vlan; 1138 vf_vlan.qos = ivi.qos; 1139 vf_tx_rate.rate = ivi.max_tx_rate; 1140 vf_rate.min_tx_rate = ivi.min_tx_rate; 1141 vf_rate.max_tx_rate = ivi.max_tx_rate; 1142 vf_spoofchk.setting = ivi.spoofchk; 1143 vf_linkstate.link_state = ivi.linkstate; 1144 vf = nla_nest_start(skb, IFLA_VF_INFO); 1145 if (!vf) { 1146 nla_nest_cancel(skb, vfinfo); 1147 goto nla_put_failure; 1148 } 1149 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1150 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1151 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1152 &vf_rate) || 1153 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1154 &vf_tx_rate) || 1155 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1156 &vf_spoofchk) || 1157 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1158 &vf_linkstate)) 1159 goto nla_put_failure; 1160 nla_nest_end(skb, vf); 1161 } 1162 nla_nest_end(skb, vfinfo); 1163 } 1164 1165 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1166 goto nla_put_failure; 1167 1168 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1169 if (rtnl_link_fill(skb, dev) < 0) 1170 goto nla_put_failure; 1171 } 1172 1173 if (dev->rtnl_link_ops && 1174 dev->rtnl_link_ops->get_link_net) { 1175 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1176 1177 if (!net_eq(dev_net(dev), link_net)) { 1178 int id = peernet2id(dev_net(dev), link_net); 1179 1180 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1181 goto nla_put_failure; 1182 } 1183 } 1184 1185 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1186 goto nla_put_failure; 1187 1188 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1189 if (af_ops->fill_link_af) { 1190 struct nlattr *af; 1191 int err; 1192 1193 if (!(af = nla_nest_start(skb, af_ops->family))) 1194 goto nla_put_failure; 1195 1196 err = af_ops->fill_link_af(skb, dev); 1197 1198 /* 1199 * Caller may return ENODATA to indicate that there 1200 * was no data to be dumped. This is not an error, it 1201 * means we should trim the attribute header and 1202 * continue. 1203 */ 1204 if (err == -ENODATA) 1205 nla_nest_cancel(skb, af); 1206 else if (err < 0) 1207 goto nla_put_failure; 1208 1209 nla_nest_end(skb, af); 1210 } 1211 } 1212 1213 nla_nest_end(skb, af_spec); 1214 1215 nlmsg_end(skb, nlh); 1216 return 0; 1217 1218 nla_put_failure: 1219 nlmsg_cancel(skb, nlh); 1220 return -EMSGSIZE; 1221 } 1222 1223 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1224 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1225 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1226 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1227 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1228 [IFLA_MTU] = { .type = NLA_U32 }, 1229 [IFLA_LINK] = { .type = NLA_U32 }, 1230 [IFLA_MASTER] = { .type = NLA_U32 }, 1231 [IFLA_CARRIER] = { .type = NLA_U8 }, 1232 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1233 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1234 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1235 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1236 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1237 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1238 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1239 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1240 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1241 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1242 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1243 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1244 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1245 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1246 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1247 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1248 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1249 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1250 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1251 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1252 }; 1253 1254 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1255 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1256 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1257 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1258 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1259 }; 1260 1261 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { 1262 [IFLA_VF_INFO] = { .type = NLA_NESTED }, 1263 }; 1264 1265 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1266 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1267 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1268 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1269 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1270 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1271 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1272 }; 1273 1274 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1275 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1276 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1277 .len = PORT_PROFILE_MAX }, 1278 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1279 .len = sizeof(struct ifla_port_vsi)}, 1280 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1281 .len = PORT_UUID_MAX }, 1282 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1283 .len = PORT_UUID_MAX }, 1284 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1285 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1286 }; 1287 1288 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1289 { 1290 struct net *net = sock_net(skb->sk); 1291 int h, s_h; 1292 int idx = 0, s_idx; 1293 struct net_device *dev; 1294 struct hlist_head *head; 1295 struct nlattr *tb[IFLA_MAX+1]; 1296 u32 ext_filter_mask = 0; 1297 int err; 1298 int hdrlen; 1299 1300 s_h = cb->args[0]; 1301 s_idx = cb->args[1]; 1302 1303 cb->seq = net->dev_base_seq; 1304 1305 /* A hack to preserve kernel<->userspace interface. 1306 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1307 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1308 * what iproute2 < v3.9.0 used. 1309 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1310 * attribute, its netlink message is shorter than struct ifinfomsg. 1311 */ 1312 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1313 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1314 1315 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1316 1317 if (tb[IFLA_EXT_MASK]) 1318 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1319 } 1320 1321 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1322 idx = 0; 1323 head = &net->dev_index_head[h]; 1324 hlist_for_each_entry(dev, head, index_hlist) { 1325 if (idx < s_idx) 1326 goto cont; 1327 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1328 NETLINK_CB(cb->skb).portid, 1329 cb->nlh->nlmsg_seq, 0, 1330 NLM_F_MULTI, 1331 ext_filter_mask); 1332 /* If we ran out of room on the first message, 1333 * we're in trouble 1334 */ 1335 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1336 1337 if (err < 0) 1338 goto out; 1339 1340 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1341 cont: 1342 idx++; 1343 } 1344 } 1345 out: 1346 cb->args[1] = idx; 1347 cb->args[0] = h; 1348 1349 return skb->len; 1350 } 1351 1352 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1353 { 1354 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1355 } 1356 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1357 1358 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1359 { 1360 struct net *net; 1361 /* Examine the link attributes and figure out which 1362 * network namespace we are talking about. 1363 */ 1364 if (tb[IFLA_NET_NS_PID]) 1365 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1366 else if (tb[IFLA_NET_NS_FD]) 1367 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1368 else 1369 net = get_net(src_net); 1370 return net; 1371 } 1372 EXPORT_SYMBOL(rtnl_link_get_net); 1373 1374 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1375 { 1376 if (dev) { 1377 if (tb[IFLA_ADDRESS] && 1378 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1379 return -EINVAL; 1380 1381 if (tb[IFLA_BROADCAST] && 1382 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1383 return -EINVAL; 1384 } 1385 1386 if (tb[IFLA_AF_SPEC]) { 1387 struct nlattr *af; 1388 int rem, err; 1389 1390 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1391 const struct rtnl_af_ops *af_ops; 1392 1393 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1394 return -EAFNOSUPPORT; 1395 1396 if (!af_ops->set_link_af) 1397 return -EOPNOTSUPP; 1398 1399 if (af_ops->validate_link_af) { 1400 err = af_ops->validate_link_af(dev, af); 1401 if (err < 0) 1402 return err; 1403 } 1404 } 1405 } 1406 1407 return 0; 1408 } 1409 1410 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) 1411 { 1412 int rem, err = -EINVAL; 1413 struct nlattr *vf; 1414 const struct net_device_ops *ops = dev->netdev_ops; 1415 1416 nla_for_each_nested(vf, attr, rem) { 1417 switch (nla_type(vf)) { 1418 case IFLA_VF_MAC: { 1419 struct ifla_vf_mac *ivm; 1420 ivm = nla_data(vf); 1421 err = -EOPNOTSUPP; 1422 if (ops->ndo_set_vf_mac) 1423 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1424 ivm->mac); 1425 break; 1426 } 1427 case IFLA_VF_VLAN: { 1428 struct ifla_vf_vlan *ivv; 1429 ivv = nla_data(vf); 1430 err = -EOPNOTSUPP; 1431 if (ops->ndo_set_vf_vlan) 1432 err = ops->ndo_set_vf_vlan(dev, ivv->vf, 1433 ivv->vlan, 1434 ivv->qos); 1435 break; 1436 } 1437 case IFLA_VF_TX_RATE: { 1438 struct ifla_vf_tx_rate *ivt; 1439 struct ifla_vf_info ivf; 1440 ivt = nla_data(vf); 1441 err = -EOPNOTSUPP; 1442 if (ops->ndo_get_vf_config) 1443 err = ops->ndo_get_vf_config(dev, ivt->vf, 1444 &ivf); 1445 if (err) 1446 break; 1447 err = -EOPNOTSUPP; 1448 if (ops->ndo_set_vf_rate) 1449 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1450 ivf.min_tx_rate, 1451 ivt->rate); 1452 break; 1453 } 1454 case IFLA_VF_RATE: { 1455 struct ifla_vf_rate *ivt; 1456 ivt = nla_data(vf); 1457 err = -EOPNOTSUPP; 1458 if (ops->ndo_set_vf_rate) 1459 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1460 ivt->min_tx_rate, 1461 ivt->max_tx_rate); 1462 break; 1463 } 1464 case IFLA_VF_SPOOFCHK: { 1465 struct ifla_vf_spoofchk *ivs; 1466 ivs = nla_data(vf); 1467 err = -EOPNOTSUPP; 1468 if (ops->ndo_set_vf_spoofchk) 1469 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1470 ivs->setting); 1471 break; 1472 } 1473 case IFLA_VF_LINK_STATE: { 1474 struct ifla_vf_link_state *ivl; 1475 ivl = nla_data(vf); 1476 err = -EOPNOTSUPP; 1477 if (ops->ndo_set_vf_link_state) 1478 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1479 ivl->link_state); 1480 break; 1481 } 1482 default: 1483 err = -EINVAL; 1484 break; 1485 } 1486 if (err) 1487 break; 1488 } 1489 return err; 1490 } 1491 1492 static int do_set_master(struct net_device *dev, int ifindex) 1493 { 1494 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1495 const struct net_device_ops *ops; 1496 int err; 1497 1498 if (upper_dev) { 1499 if (upper_dev->ifindex == ifindex) 1500 return 0; 1501 ops = upper_dev->netdev_ops; 1502 if (ops->ndo_del_slave) { 1503 err = ops->ndo_del_slave(upper_dev, dev); 1504 if (err) 1505 return err; 1506 } else { 1507 return -EOPNOTSUPP; 1508 } 1509 } 1510 1511 if (ifindex) { 1512 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1513 if (!upper_dev) 1514 return -EINVAL; 1515 ops = upper_dev->netdev_ops; 1516 if (ops->ndo_add_slave) { 1517 err = ops->ndo_add_slave(upper_dev, dev); 1518 if (err) 1519 return err; 1520 } else { 1521 return -EOPNOTSUPP; 1522 } 1523 } 1524 return 0; 1525 } 1526 1527 #define DO_SETLINK_MODIFIED 0x01 1528 /* notify flag means notify + modified. */ 1529 #define DO_SETLINK_NOTIFY 0x03 1530 static int do_setlink(const struct sk_buff *skb, 1531 struct net_device *dev, struct ifinfomsg *ifm, 1532 struct nlattr **tb, char *ifname, int status) 1533 { 1534 const struct net_device_ops *ops = dev->netdev_ops; 1535 int err; 1536 1537 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1538 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1539 if (IS_ERR(net)) { 1540 err = PTR_ERR(net); 1541 goto errout; 1542 } 1543 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1544 put_net(net); 1545 err = -EPERM; 1546 goto errout; 1547 } 1548 err = dev_change_net_namespace(dev, net, ifname); 1549 put_net(net); 1550 if (err) 1551 goto errout; 1552 status |= DO_SETLINK_MODIFIED; 1553 } 1554 1555 if (tb[IFLA_MAP]) { 1556 struct rtnl_link_ifmap *u_map; 1557 struct ifmap k_map; 1558 1559 if (!ops->ndo_set_config) { 1560 err = -EOPNOTSUPP; 1561 goto errout; 1562 } 1563 1564 if (!netif_device_present(dev)) { 1565 err = -ENODEV; 1566 goto errout; 1567 } 1568 1569 u_map = nla_data(tb[IFLA_MAP]); 1570 k_map.mem_start = (unsigned long) u_map->mem_start; 1571 k_map.mem_end = (unsigned long) u_map->mem_end; 1572 k_map.base_addr = (unsigned short) u_map->base_addr; 1573 k_map.irq = (unsigned char) u_map->irq; 1574 k_map.dma = (unsigned char) u_map->dma; 1575 k_map.port = (unsigned char) u_map->port; 1576 1577 err = ops->ndo_set_config(dev, &k_map); 1578 if (err < 0) 1579 goto errout; 1580 1581 status |= DO_SETLINK_NOTIFY; 1582 } 1583 1584 if (tb[IFLA_ADDRESS]) { 1585 struct sockaddr *sa; 1586 int len; 1587 1588 len = sizeof(sa_family_t) + dev->addr_len; 1589 sa = kmalloc(len, GFP_KERNEL); 1590 if (!sa) { 1591 err = -ENOMEM; 1592 goto errout; 1593 } 1594 sa->sa_family = dev->type; 1595 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1596 dev->addr_len); 1597 err = dev_set_mac_address(dev, sa); 1598 kfree(sa); 1599 if (err) 1600 goto errout; 1601 status |= DO_SETLINK_MODIFIED; 1602 } 1603 1604 if (tb[IFLA_MTU]) { 1605 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1606 if (err < 0) 1607 goto errout; 1608 status |= DO_SETLINK_MODIFIED; 1609 } 1610 1611 if (tb[IFLA_GROUP]) { 1612 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1613 status |= DO_SETLINK_NOTIFY; 1614 } 1615 1616 /* 1617 * Interface selected by interface index but interface 1618 * name provided implies that a name change has been 1619 * requested. 1620 */ 1621 if (ifm->ifi_index > 0 && ifname[0]) { 1622 err = dev_change_name(dev, ifname); 1623 if (err < 0) 1624 goto errout; 1625 status |= DO_SETLINK_MODIFIED; 1626 } 1627 1628 if (tb[IFLA_IFALIAS]) { 1629 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1630 nla_len(tb[IFLA_IFALIAS])); 1631 if (err < 0) 1632 goto errout; 1633 status |= DO_SETLINK_NOTIFY; 1634 } 1635 1636 if (tb[IFLA_BROADCAST]) { 1637 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1638 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1639 } 1640 1641 if (ifm->ifi_flags || ifm->ifi_change) { 1642 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1643 if (err < 0) 1644 goto errout; 1645 } 1646 1647 if (tb[IFLA_MASTER]) { 1648 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1649 if (err) 1650 goto errout; 1651 status |= DO_SETLINK_MODIFIED; 1652 } 1653 1654 if (tb[IFLA_CARRIER]) { 1655 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 1656 if (err) 1657 goto errout; 1658 status |= DO_SETLINK_MODIFIED; 1659 } 1660 1661 if (tb[IFLA_TXQLEN]) { 1662 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 1663 1664 if (dev->tx_queue_len ^ value) 1665 status |= DO_SETLINK_NOTIFY; 1666 1667 dev->tx_queue_len = value; 1668 } 1669 1670 if (tb[IFLA_OPERSTATE]) 1671 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1672 1673 if (tb[IFLA_LINKMODE]) { 1674 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 1675 1676 write_lock_bh(&dev_base_lock); 1677 if (dev->link_mode ^ value) 1678 status |= DO_SETLINK_NOTIFY; 1679 dev->link_mode = value; 1680 write_unlock_bh(&dev_base_lock); 1681 } 1682 1683 if (tb[IFLA_VFINFO_LIST]) { 1684 struct nlattr *attr; 1685 int rem; 1686 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1687 if (nla_type(attr) != IFLA_VF_INFO) { 1688 err = -EINVAL; 1689 goto errout; 1690 } 1691 err = do_setvfinfo(dev, attr); 1692 if (err < 0) 1693 goto errout; 1694 status |= DO_SETLINK_NOTIFY; 1695 } 1696 } 1697 err = 0; 1698 1699 if (tb[IFLA_VF_PORTS]) { 1700 struct nlattr *port[IFLA_PORT_MAX+1]; 1701 struct nlattr *attr; 1702 int vf; 1703 int rem; 1704 1705 err = -EOPNOTSUPP; 1706 if (!ops->ndo_set_vf_port) 1707 goto errout; 1708 1709 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1710 if (nla_type(attr) != IFLA_VF_PORT) 1711 continue; 1712 err = nla_parse_nested(port, IFLA_PORT_MAX, 1713 attr, ifla_port_policy); 1714 if (err < 0) 1715 goto errout; 1716 if (!port[IFLA_PORT_VF]) { 1717 err = -EOPNOTSUPP; 1718 goto errout; 1719 } 1720 vf = nla_get_u32(port[IFLA_PORT_VF]); 1721 err = ops->ndo_set_vf_port(dev, vf, port); 1722 if (err < 0) 1723 goto errout; 1724 status |= DO_SETLINK_NOTIFY; 1725 } 1726 } 1727 err = 0; 1728 1729 if (tb[IFLA_PORT_SELF]) { 1730 struct nlattr *port[IFLA_PORT_MAX+1]; 1731 1732 err = nla_parse_nested(port, IFLA_PORT_MAX, 1733 tb[IFLA_PORT_SELF], ifla_port_policy); 1734 if (err < 0) 1735 goto errout; 1736 1737 err = -EOPNOTSUPP; 1738 if (ops->ndo_set_vf_port) 1739 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1740 if (err < 0) 1741 goto errout; 1742 status |= DO_SETLINK_NOTIFY; 1743 } 1744 1745 if (tb[IFLA_AF_SPEC]) { 1746 struct nlattr *af; 1747 int rem; 1748 1749 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1750 const struct rtnl_af_ops *af_ops; 1751 1752 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1753 BUG(); 1754 1755 err = af_ops->set_link_af(dev, af); 1756 if (err < 0) 1757 goto errout; 1758 1759 status |= DO_SETLINK_NOTIFY; 1760 } 1761 } 1762 err = 0; 1763 1764 errout: 1765 if (status & DO_SETLINK_MODIFIED) { 1766 if (status & DO_SETLINK_NOTIFY) 1767 netdev_state_change(dev); 1768 1769 if (err < 0) 1770 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", 1771 dev->name); 1772 } 1773 1774 return err; 1775 } 1776 1777 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 1778 { 1779 struct net *net = sock_net(skb->sk); 1780 struct ifinfomsg *ifm; 1781 struct net_device *dev; 1782 int err; 1783 struct nlattr *tb[IFLA_MAX+1]; 1784 char ifname[IFNAMSIZ]; 1785 1786 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1787 if (err < 0) 1788 goto errout; 1789 1790 if (tb[IFLA_IFNAME]) 1791 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1792 else 1793 ifname[0] = '\0'; 1794 1795 err = -EINVAL; 1796 ifm = nlmsg_data(nlh); 1797 if (ifm->ifi_index > 0) 1798 dev = __dev_get_by_index(net, ifm->ifi_index); 1799 else if (tb[IFLA_IFNAME]) 1800 dev = __dev_get_by_name(net, ifname); 1801 else 1802 goto errout; 1803 1804 if (dev == NULL) { 1805 err = -ENODEV; 1806 goto errout; 1807 } 1808 1809 err = validate_linkmsg(dev, tb); 1810 if (err < 0) 1811 goto errout; 1812 1813 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 1814 errout: 1815 return err; 1816 } 1817 1818 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 1819 { 1820 struct net *net = sock_net(skb->sk); 1821 const struct rtnl_link_ops *ops; 1822 struct net_device *dev; 1823 struct ifinfomsg *ifm; 1824 char ifname[IFNAMSIZ]; 1825 struct nlattr *tb[IFLA_MAX+1]; 1826 int err; 1827 LIST_HEAD(list_kill); 1828 1829 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1830 if (err < 0) 1831 return err; 1832 1833 if (tb[IFLA_IFNAME]) 1834 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1835 1836 ifm = nlmsg_data(nlh); 1837 if (ifm->ifi_index > 0) 1838 dev = __dev_get_by_index(net, ifm->ifi_index); 1839 else if (tb[IFLA_IFNAME]) 1840 dev = __dev_get_by_name(net, ifname); 1841 else 1842 return -EINVAL; 1843 1844 if (!dev) 1845 return -ENODEV; 1846 1847 ops = dev->rtnl_link_ops; 1848 if (!ops || !ops->dellink) 1849 return -EOPNOTSUPP; 1850 1851 ops->dellink(dev, &list_kill); 1852 unregister_netdevice_many(&list_kill); 1853 return 0; 1854 } 1855 1856 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 1857 { 1858 unsigned int old_flags; 1859 int err; 1860 1861 old_flags = dev->flags; 1862 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 1863 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1864 if (err < 0) 1865 return err; 1866 } 1867 1868 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 1869 1870 __dev_notify_flags(dev, old_flags, ~0U); 1871 return 0; 1872 } 1873 EXPORT_SYMBOL(rtnl_configure_link); 1874 1875 struct net_device *rtnl_create_link(struct net *net, 1876 char *ifname, unsigned char name_assign_type, 1877 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 1878 { 1879 int err; 1880 struct net_device *dev; 1881 unsigned int num_tx_queues = 1; 1882 unsigned int num_rx_queues = 1; 1883 1884 if (tb[IFLA_NUM_TX_QUEUES]) 1885 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 1886 else if (ops->get_num_tx_queues) 1887 num_tx_queues = ops->get_num_tx_queues(); 1888 1889 if (tb[IFLA_NUM_RX_QUEUES]) 1890 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 1891 else if (ops->get_num_rx_queues) 1892 num_rx_queues = ops->get_num_rx_queues(); 1893 1894 err = -ENOMEM; 1895 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 1896 ops->setup, num_tx_queues, num_rx_queues); 1897 if (!dev) 1898 goto err; 1899 1900 dev_net_set(dev, net); 1901 dev->rtnl_link_ops = ops; 1902 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 1903 1904 if (tb[IFLA_MTU]) 1905 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1906 if (tb[IFLA_ADDRESS]) { 1907 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1908 nla_len(tb[IFLA_ADDRESS])); 1909 dev->addr_assign_type = NET_ADDR_SET; 1910 } 1911 if (tb[IFLA_BROADCAST]) 1912 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1913 nla_len(tb[IFLA_BROADCAST])); 1914 if (tb[IFLA_TXQLEN]) 1915 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1916 if (tb[IFLA_OPERSTATE]) 1917 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1918 if (tb[IFLA_LINKMODE]) 1919 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1920 if (tb[IFLA_GROUP]) 1921 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1922 1923 return dev; 1924 1925 err: 1926 return ERR_PTR(err); 1927 } 1928 EXPORT_SYMBOL(rtnl_create_link); 1929 1930 static int rtnl_group_changelink(const struct sk_buff *skb, 1931 struct net *net, int group, 1932 struct ifinfomsg *ifm, 1933 struct nlattr **tb) 1934 { 1935 struct net_device *dev; 1936 int err; 1937 1938 for_each_netdev(net, dev) { 1939 if (dev->group == group) { 1940 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 1941 if (err < 0) 1942 return err; 1943 } 1944 } 1945 1946 return 0; 1947 } 1948 1949 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 1950 { 1951 struct net *net = sock_net(skb->sk); 1952 const struct rtnl_link_ops *ops; 1953 const struct rtnl_link_ops *m_ops = NULL; 1954 struct net_device *dev; 1955 struct net_device *master_dev = NULL; 1956 struct ifinfomsg *ifm; 1957 char kind[MODULE_NAME_LEN]; 1958 char ifname[IFNAMSIZ]; 1959 struct nlattr *tb[IFLA_MAX+1]; 1960 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 1961 unsigned char name_assign_type = NET_NAME_USER; 1962 int err; 1963 1964 #ifdef CONFIG_MODULES 1965 replay: 1966 #endif 1967 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1968 if (err < 0) 1969 return err; 1970 1971 if (tb[IFLA_IFNAME]) 1972 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1973 else 1974 ifname[0] = '\0'; 1975 1976 ifm = nlmsg_data(nlh); 1977 if (ifm->ifi_index > 0) 1978 dev = __dev_get_by_index(net, ifm->ifi_index); 1979 else { 1980 if (ifname[0]) 1981 dev = __dev_get_by_name(net, ifname); 1982 else 1983 dev = NULL; 1984 } 1985 1986 if (dev) { 1987 master_dev = netdev_master_upper_dev_get(dev); 1988 if (master_dev) 1989 m_ops = master_dev->rtnl_link_ops; 1990 } 1991 1992 err = validate_linkmsg(dev, tb); 1993 if (err < 0) 1994 return err; 1995 1996 if (tb[IFLA_LINKINFO]) { 1997 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 1998 tb[IFLA_LINKINFO], ifla_info_policy); 1999 if (err < 0) 2000 return err; 2001 } else 2002 memset(linkinfo, 0, sizeof(linkinfo)); 2003 2004 if (linkinfo[IFLA_INFO_KIND]) { 2005 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2006 ops = rtnl_link_ops_get(kind); 2007 } else { 2008 kind[0] = '\0'; 2009 ops = NULL; 2010 } 2011 2012 if (1) { 2013 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2014 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2015 struct nlattr **data = NULL; 2016 struct nlattr **slave_data = NULL; 2017 struct net *dest_net, *link_net = NULL; 2018 2019 if (ops) { 2020 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2021 err = nla_parse_nested(attr, ops->maxtype, 2022 linkinfo[IFLA_INFO_DATA], 2023 ops->policy); 2024 if (err < 0) 2025 return err; 2026 data = attr; 2027 } 2028 if (ops->validate) { 2029 err = ops->validate(tb, data); 2030 if (err < 0) 2031 return err; 2032 } 2033 } 2034 2035 if (m_ops) { 2036 if (m_ops->slave_maxtype && 2037 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2038 err = nla_parse_nested(slave_attr, 2039 m_ops->slave_maxtype, 2040 linkinfo[IFLA_INFO_SLAVE_DATA], 2041 m_ops->slave_policy); 2042 if (err < 0) 2043 return err; 2044 slave_data = slave_attr; 2045 } 2046 if (m_ops->slave_validate) { 2047 err = m_ops->slave_validate(tb, slave_data); 2048 if (err < 0) 2049 return err; 2050 } 2051 } 2052 2053 if (dev) { 2054 int status = 0; 2055 2056 if (nlh->nlmsg_flags & NLM_F_EXCL) 2057 return -EEXIST; 2058 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2059 return -EOPNOTSUPP; 2060 2061 if (linkinfo[IFLA_INFO_DATA]) { 2062 if (!ops || ops != dev->rtnl_link_ops || 2063 !ops->changelink) 2064 return -EOPNOTSUPP; 2065 2066 err = ops->changelink(dev, tb, data); 2067 if (err < 0) 2068 return err; 2069 status |= DO_SETLINK_NOTIFY; 2070 } 2071 2072 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2073 if (!m_ops || !m_ops->slave_changelink) 2074 return -EOPNOTSUPP; 2075 2076 err = m_ops->slave_changelink(master_dev, dev, 2077 tb, slave_data); 2078 if (err < 0) 2079 return err; 2080 status |= DO_SETLINK_NOTIFY; 2081 } 2082 2083 return do_setlink(skb, dev, ifm, tb, ifname, status); 2084 } 2085 2086 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2087 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2088 return rtnl_group_changelink(skb, net, 2089 nla_get_u32(tb[IFLA_GROUP]), 2090 ifm, tb); 2091 return -ENODEV; 2092 } 2093 2094 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2095 return -EOPNOTSUPP; 2096 2097 if (!ops) { 2098 #ifdef CONFIG_MODULES 2099 if (kind[0]) { 2100 __rtnl_unlock(); 2101 request_module("rtnl-link-%s", kind); 2102 rtnl_lock(); 2103 ops = rtnl_link_ops_get(kind); 2104 if (ops) 2105 goto replay; 2106 } 2107 #endif 2108 return -EOPNOTSUPP; 2109 } 2110 2111 if (!ops->setup) 2112 return -EOPNOTSUPP; 2113 2114 if (!ifname[0]) { 2115 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2116 name_assign_type = NET_NAME_ENUM; 2117 } 2118 2119 dest_net = rtnl_link_get_net(net, tb); 2120 if (IS_ERR(dest_net)) 2121 return PTR_ERR(dest_net); 2122 2123 err = -EPERM; 2124 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2125 goto out; 2126 2127 if (tb[IFLA_LINK_NETNSID]) { 2128 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2129 2130 link_net = get_net_ns_by_id(dest_net, id); 2131 if (!link_net) { 2132 err = -EINVAL; 2133 goto out; 2134 } 2135 err = -EPERM; 2136 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2137 goto out; 2138 } 2139 2140 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2141 name_assign_type, ops, tb); 2142 if (IS_ERR(dev)) { 2143 err = PTR_ERR(dev); 2144 goto out; 2145 } 2146 2147 dev->ifindex = ifm->ifi_index; 2148 2149 if (ops->newlink) { 2150 err = ops->newlink(link_net ? : net, dev, tb, data); 2151 /* Drivers should call free_netdev() in ->destructor 2152 * and unregister it on failure after registration 2153 * so that device could be finally freed in rtnl_unlock. 2154 */ 2155 if (err < 0) { 2156 /* If device is not registered at all, free it now */ 2157 if (dev->reg_state == NETREG_UNINITIALIZED) 2158 free_netdev(dev); 2159 goto out; 2160 } 2161 } else { 2162 err = register_netdevice(dev); 2163 if (err < 0) { 2164 free_netdev(dev); 2165 goto out; 2166 } 2167 } 2168 err = rtnl_configure_link(dev, ifm); 2169 if (err < 0) 2170 goto out_unregister; 2171 if (link_net) { 2172 err = dev_change_net_namespace(dev, dest_net, ifname); 2173 if (err < 0) 2174 goto out_unregister; 2175 } 2176 out: 2177 if (link_net) 2178 put_net(link_net); 2179 put_net(dest_net); 2180 return err; 2181 out_unregister: 2182 if (ops->newlink) { 2183 LIST_HEAD(list_kill); 2184 2185 ops->dellink(dev, &list_kill); 2186 unregister_netdevice_many(&list_kill); 2187 } else { 2188 unregister_netdevice(dev); 2189 } 2190 goto out; 2191 } 2192 } 2193 2194 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2195 { 2196 struct net *net = sock_net(skb->sk); 2197 struct ifinfomsg *ifm; 2198 char ifname[IFNAMSIZ]; 2199 struct nlattr *tb[IFLA_MAX+1]; 2200 struct net_device *dev = NULL; 2201 struct sk_buff *nskb; 2202 int err; 2203 u32 ext_filter_mask = 0; 2204 2205 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2206 if (err < 0) 2207 return err; 2208 2209 if (tb[IFLA_IFNAME]) 2210 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2211 2212 if (tb[IFLA_EXT_MASK]) 2213 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2214 2215 ifm = nlmsg_data(nlh); 2216 if (ifm->ifi_index > 0) 2217 dev = __dev_get_by_index(net, ifm->ifi_index); 2218 else if (tb[IFLA_IFNAME]) 2219 dev = __dev_get_by_name(net, ifname); 2220 else 2221 return -EINVAL; 2222 2223 if (dev == NULL) 2224 return -ENODEV; 2225 2226 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2227 if (nskb == NULL) 2228 return -ENOBUFS; 2229 2230 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2231 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2232 if (err < 0) { 2233 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2234 WARN_ON(err == -EMSGSIZE); 2235 kfree_skb(nskb); 2236 } else 2237 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2238 2239 return err; 2240 } 2241 2242 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2243 { 2244 struct net *net = sock_net(skb->sk); 2245 struct net_device *dev; 2246 struct nlattr *tb[IFLA_MAX+1]; 2247 u32 ext_filter_mask = 0; 2248 u16 min_ifinfo_dump_size = 0; 2249 int hdrlen; 2250 2251 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2252 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2253 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2254 2255 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2256 if (tb[IFLA_EXT_MASK]) 2257 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2258 } 2259 2260 if (!ext_filter_mask) 2261 return NLMSG_GOODSIZE; 2262 /* 2263 * traverse the list of net devices and compute the minimum 2264 * buffer size based upon the filter mask. 2265 */ 2266 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2267 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2268 if_nlmsg_size(dev, 2269 ext_filter_mask)); 2270 } 2271 2272 return min_ifinfo_dump_size; 2273 } 2274 2275 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2276 { 2277 int idx; 2278 int s_idx = cb->family; 2279 2280 if (s_idx == 0) 2281 s_idx = 1; 2282 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2283 int type = cb->nlh->nlmsg_type-RTM_BASE; 2284 if (idx < s_idx || idx == PF_PACKET) 2285 continue; 2286 if (rtnl_msg_handlers[idx] == NULL || 2287 rtnl_msg_handlers[idx][type].dumpit == NULL) 2288 continue; 2289 if (idx > s_idx) { 2290 memset(&cb->args[0], 0, sizeof(cb->args)); 2291 cb->prev_seq = 0; 2292 cb->seq = 0; 2293 } 2294 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2295 break; 2296 } 2297 cb->family = idx; 2298 2299 return skb->len; 2300 } 2301 2302 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2303 unsigned int change, gfp_t flags) 2304 { 2305 struct net *net = dev_net(dev); 2306 struct sk_buff *skb; 2307 int err = -ENOBUFS; 2308 size_t if_info_size; 2309 2310 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2311 if (skb == NULL) 2312 goto errout; 2313 2314 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2315 if (err < 0) { 2316 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2317 WARN_ON(err == -EMSGSIZE); 2318 kfree_skb(skb); 2319 goto errout; 2320 } 2321 return skb; 2322 errout: 2323 if (err < 0) 2324 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2325 return NULL; 2326 } 2327 2328 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2329 { 2330 struct net *net = dev_net(dev); 2331 2332 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2333 } 2334 2335 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2336 gfp_t flags) 2337 { 2338 struct sk_buff *skb; 2339 2340 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2341 if (skb) 2342 rtmsg_ifinfo_send(skb, dev, flags); 2343 } 2344 EXPORT_SYMBOL(rtmsg_ifinfo); 2345 2346 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2347 struct net_device *dev, 2348 u8 *addr, u32 pid, u32 seq, 2349 int type, unsigned int flags, 2350 int nlflags) 2351 { 2352 struct nlmsghdr *nlh; 2353 struct ndmsg *ndm; 2354 2355 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2356 if (!nlh) 2357 return -EMSGSIZE; 2358 2359 ndm = nlmsg_data(nlh); 2360 ndm->ndm_family = AF_BRIDGE; 2361 ndm->ndm_pad1 = 0; 2362 ndm->ndm_pad2 = 0; 2363 ndm->ndm_flags = flags; 2364 ndm->ndm_type = 0; 2365 ndm->ndm_ifindex = dev->ifindex; 2366 ndm->ndm_state = NUD_PERMANENT; 2367 2368 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2369 goto nla_put_failure; 2370 2371 nlmsg_end(skb, nlh); 2372 return 0; 2373 2374 nla_put_failure: 2375 nlmsg_cancel(skb, nlh); 2376 return -EMSGSIZE; 2377 } 2378 2379 static inline size_t rtnl_fdb_nlmsg_size(void) 2380 { 2381 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2382 } 2383 2384 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type) 2385 { 2386 struct net *net = dev_net(dev); 2387 struct sk_buff *skb; 2388 int err = -ENOBUFS; 2389 2390 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2391 if (!skb) 2392 goto errout; 2393 2394 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0); 2395 if (err < 0) { 2396 kfree_skb(skb); 2397 goto errout; 2398 } 2399 2400 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2401 return; 2402 errout: 2403 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2404 } 2405 2406 /** 2407 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2408 */ 2409 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2410 struct nlattr *tb[], 2411 struct net_device *dev, 2412 const unsigned char *addr, u16 vid, 2413 u16 flags) 2414 { 2415 int err = -EINVAL; 2416 2417 /* If aging addresses are supported device will need to 2418 * implement its own handler for this. 2419 */ 2420 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2421 pr_info("%s: FDB only supports static addresses\n", dev->name); 2422 return err; 2423 } 2424 2425 if (vid) { 2426 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2427 return err; 2428 } 2429 2430 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2431 err = dev_uc_add_excl(dev, addr); 2432 else if (is_multicast_ether_addr(addr)) 2433 err = dev_mc_add_excl(dev, addr); 2434 2435 /* Only return duplicate errors if NLM_F_EXCL is set */ 2436 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2437 err = 0; 2438 2439 return err; 2440 } 2441 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2442 2443 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2444 { 2445 u16 vid = 0; 2446 2447 if (vlan_attr) { 2448 if (nla_len(vlan_attr) != sizeof(u16)) { 2449 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2450 return -EINVAL; 2451 } 2452 2453 vid = nla_get_u16(vlan_attr); 2454 2455 if (!vid || vid >= VLAN_VID_MASK) { 2456 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2457 vid); 2458 return -EINVAL; 2459 } 2460 } 2461 *p_vid = vid; 2462 return 0; 2463 } 2464 2465 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2466 { 2467 struct net *net = sock_net(skb->sk); 2468 struct ndmsg *ndm; 2469 struct nlattr *tb[NDA_MAX+1]; 2470 struct net_device *dev; 2471 u8 *addr; 2472 u16 vid; 2473 int err; 2474 2475 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2476 if (err < 0) 2477 return err; 2478 2479 ndm = nlmsg_data(nlh); 2480 if (ndm->ndm_ifindex == 0) { 2481 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2482 return -EINVAL; 2483 } 2484 2485 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2486 if (dev == NULL) { 2487 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2488 return -ENODEV; 2489 } 2490 2491 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2492 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2493 return -EINVAL; 2494 } 2495 2496 addr = nla_data(tb[NDA_LLADDR]); 2497 2498 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2499 if (err) 2500 return err; 2501 2502 err = -EOPNOTSUPP; 2503 2504 /* Support fdb on master device the net/bridge default case */ 2505 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2506 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2507 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2508 const struct net_device_ops *ops = br_dev->netdev_ops; 2509 2510 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2511 nlh->nlmsg_flags); 2512 if (err) 2513 goto out; 2514 else 2515 ndm->ndm_flags &= ~NTF_MASTER; 2516 } 2517 2518 /* Embedded bridge, macvlan, and any other device support */ 2519 if ((ndm->ndm_flags & NTF_SELF)) { 2520 if (dev->netdev_ops->ndo_fdb_add) 2521 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 2522 vid, 2523 nlh->nlmsg_flags); 2524 else 2525 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 2526 nlh->nlmsg_flags); 2527 2528 if (!err) { 2529 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH); 2530 ndm->ndm_flags &= ~NTF_SELF; 2531 } 2532 } 2533 out: 2534 return err; 2535 } 2536 2537 /** 2538 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 2539 */ 2540 int ndo_dflt_fdb_del(struct ndmsg *ndm, 2541 struct nlattr *tb[], 2542 struct net_device *dev, 2543 const unsigned char *addr, u16 vid) 2544 { 2545 int err = -EINVAL; 2546 2547 /* If aging addresses are supported device will need to 2548 * implement its own handler for this. 2549 */ 2550 if (!(ndm->ndm_state & NUD_PERMANENT)) { 2551 pr_info("%s: FDB only supports static addresses\n", dev->name); 2552 return err; 2553 } 2554 2555 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2556 err = dev_uc_del(dev, addr); 2557 else if (is_multicast_ether_addr(addr)) 2558 err = dev_mc_del(dev, addr); 2559 2560 return err; 2561 } 2562 EXPORT_SYMBOL(ndo_dflt_fdb_del); 2563 2564 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 2565 { 2566 struct net *net = sock_net(skb->sk); 2567 struct ndmsg *ndm; 2568 struct nlattr *tb[NDA_MAX+1]; 2569 struct net_device *dev; 2570 int err = -EINVAL; 2571 __u8 *addr; 2572 u16 vid; 2573 2574 if (!netlink_capable(skb, CAP_NET_ADMIN)) 2575 return -EPERM; 2576 2577 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2578 if (err < 0) 2579 return err; 2580 2581 ndm = nlmsg_data(nlh); 2582 if (ndm->ndm_ifindex == 0) { 2583 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2584 return -EINVAL; 2585 } 2586 2587 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2588 if (dev == NULL) { 2589 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2590 return -ENODEV; 2591 } 2592 2593 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2594 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 2595 return -EINVAL; 2596 } 2597 2598 addr = nla_data(tb[NDA_LLADDR]); 2599 2600 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2601 if (err) 2602 return err; 2603 2604 err = -EOPNOTSUPP; 2605 2606 /* Support fdb on master device the net/bridge default case */ 2607 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2608 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2609 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2610 const struct net_device_ops *ops = br_dev->netdev_ops; 2611 2612 if (ops->ndo_fdb_del) 2613 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 2614 2615 if (err) 2616 goto out; 2617 else 2618 ndm->ndm_flags &= ~NTF_MASTER; 2619 } 2620 2621 /* Embedded bridge, macvlan, and any other device support */ 2622 if (ndm->ndm_flags & NTF_SELF) { 2623 if (dev->netdev_ops->ndo_fdb_del) 2624 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 2625 vid); 2626 else 2627 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 2628 2629 if (!err) { 2630 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH); 2631 ndm->ndm_flags &= ~NTF_SELF; 2632 } 2633 } 2634 out: 2635 return err; 2636 } 2637 2638 static int nlmsg_populate_fdb(struct sk_buff *skb, 2639 struct netlink_callback *cb, 2640 struct net_device *dev, 2641 int *idx, 2642 struct netdev_hw_addr_list *list) 2643 { 2644 struct netdev_hw_addr *ha; 2645 int err; 2646 u32 portid, seq; 2647 2648 portid = NETLINK_CB(cb->skb).portid; 2649 seq = cb->nlh->nlmsg_seq; 2650 2651 list_for_each_entry(ha, &list->list, list) { 2652 if (*idx < cb->args[0]) 2653 goto skip; 2654 2655 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 2656 portid, seq, 2657 RTM_NEWNEIGH, NTF_SELF, 2658 NLM_F_MULTI); 2659 if (err < 0) 2660 return err; 2661 skip: 2662 *idx += 1; 2663 } 2664 return 0; 2665 } 2666 2667 /** 2668 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2669 * @nlh: netlink message header 2670 * @dev: netdevice 2671 * 2672 * Default netdevice operation to dump the existing unicast address list. 2673 * Returns number of addresses from list put in skb. 2674 */ 2675 int ndo_dflt_fdb_dump(struct sk_buff *skb, 2676 struct netlink_callback *cb, 2677 struct net_device *dev, 2678 struct net_device *filter_dev, 2679 int idx) 2680 { 2681 int err; 2682 2683 netif_addr_lock_bh(dev); 2684 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 2685 if (err) 2686 goto out; 2687 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 2688 out: 2689 netif_addr_unlock_bh(dev); 2690 return idx; 2691 } 2692 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 2693 2694 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 2695 { 2696 struct net_device *dev; 2697 struct nlattr *tb[IFLA_MAX+1]; 2698 struct net_device *bdev = NULL; 2699 struct net_device *br_dev = NULL; 2700 const struct net_device_ops *ops = NULL; 2701 const struct net_device_ops *cops = NULL; 2702 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 2703 struct net *net = sock_net(skb->sk); 2704 int brport_idx = 0; 2705 int br_idx = 0; 2706 int idx = 0; 2707 2708 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 2709 ifla_policy) == 0) { 2710 if (tb[IFLA_MASTER]) 2711 br_idx = nla_get_u32(tb[IFLA_MASTER]); 2712 } 2713 2714 brport_idx = ifm->ifi_index; 2715 2716 if (br_idx) { 2717 br_dev = __dev_get_by_index(net, br_idx); 2718 if (!br_dev) 2719 return -ENODEV; 2720 2721 ops = br_dev->netdev_ops; 2722 bdev = br_dev; 2723 } 2724 2725 for_each_netdev(net, dev) { 2726 if (brport_idx && (dev->ifindex != brport_idx)) 2727 continue; 2728 2729 if (!br_idx) { /* user did not specify a specific bridge */ 2730 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2731 br_dev = netdev_master_upper_dev_get(dev); 2732 cops = br_dev->netdev_ops; 2733 } 2734 2735 bdev = dev; 2736 } else { 2737 if (dev != br_dev && 2738 !(dev->priv_flags & IFF_BRIDGE_PORT)) 2739 continue; 2740 2741 if (br_dev != netdev_master_upper_dev_get(dev) && 2742 !(dev->priv_flags & IFF_EBRIDGE)) 2743 continue; 2744 2745 bdev = br_dev; 2746 cops = ops; 2747 } 2748 2749 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2750 if (cops && cops->ndo_fdb_dump) 2751 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev, 2752 idx); 2753 } 2754 2755 if (dev->netdev_ops->ndo_fdb_dump) 2756 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL, 2757 idx); 2758 else 2759 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); 2760 2761 cops = NULL; 2762 } 2763 2764 cb->args[0] = idx; 2765 return skb->len; 2766 } 2767 2768 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 2769 unsigned int attrnum, unsigned int flag) 2770 { 2771 if (mask & flag) 2772 return nla_put_u8(skb, attrnum, !!(flags & flag)); 2773 return 0; 2774 } 2775 2776 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 2777 struct net_device *dev, u16 mode, 2778 u32 flags, u32 mask) 2779 { 2780 struct nlmsghdr *nlh; 2781 struct ifinfomsg *ifm; 2782 struct nlattr *br_afspec; 2783 struct nlattr *protinfo; 2784 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 2785 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2786 2787 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI); 2788 if (nlh == NULL) 2789 return -EMSGSIZE; 2790 2791 ifm = nlmsg_data(nlh); 2792 ifm->ifi_family = AF_BRIDGE; 2793 ifm->__ifi_pad = 0; 2794 ifm->ifi_type = dev->type; 2795 ifm->ifi_index = dev->ifindex; 2796 ifm->ifi_flags = dev_get_flags(dev); 2797 ifm->ifi_change = 0; 2798 2799 2800 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 2801 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 2802 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 2803 (br_dev && 2804 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 2805 (dev->addr_len && 2806 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 2807 (dev->ifindex != dev->iflink && 2808 nla_put_u32(skb, IFLA_LINK, dev->iflink))) 2809 goto nla_put_failure; 2810 2811 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 2812 if (!br_afspec) 2813 goto nla_put_failure; 2814 2815 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 2816 nla_nest_cancel(skb, br_afspec); 2817 goto nla_put_failure; 2818 } 2819 2820 if (mode != BRIDGE_MODE_UNDEF) { 2821 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 2822 nla_nest_cancel(skb, br_afspec); 2823 goto nla_put_failure; 2824 } 2825 } 2826 nla_nest_end(skb, br_afspec); 2827 2828 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 2829 if (!protinfo) 2830 goto nla_put_failure; 2831 2832 if (brport_nla_put_flag(skb, flags, mask, 2833 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 2834 brport_nla_put_flag(skb, flags, mask, 2835 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 2836 brport_nla_put_flag(skb, flags, mask, 2837 IFLA_BRPORT_FAST_LEAVE, 2838 BR_MULTICAST_FAST_LEAVE) || 2839 brport_nla_put_flag(skb, flags, mask, 2840 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 2841 brport_nla_put_flag(skb, flags, mask, 2842 IFLA_BRPORT_LEARNING, BR_LEARNING) || 2843 brport_nla_put_flag(skb, flags, mask, 2844 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 2845 brport_nla_put_flag(skb, flags, mask, 2846 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 2847 brport_nla_put_flag(skb, flags, mask, 2848 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 2849 nla_nest_cancel(skb, protinfo); 2850 goto nla_put_failure; 2851 } 2852 2853 nla_nest_end(skb, protinfo); 2854 2855 nlmsg_end(skb, nlh); 2856 return 0; 2857 nla_put_failure: 2858 nlmsg_cancel(skb, nlh); 2859 return -EMSGSIZE; 2860 } 2861 EXPORT_SYMBOL(ndo_dflt_bridge_getlink); 2862 2863 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 2864 { 2865 struct net *net = sock_net(skb->sk); 2866 struct net_device *dev; 2867 int idx = 0; 2868 u32 portid = NETLINK_CB(cb->skb).portid; 2869 u32 seq = cb->nlh->nlmsg_seq; 2870 u32 filter_mask = 0; 2871 2872 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 2873 struct nlattr *extfilt; 2874 2875 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 2876 IFLA_EXT_MASK); 2877 if (extfilt) { 2878 if (nla_len(extfilt) < sizeof(filter_mask)) 2879 return -EINVAL; 2880 2881 filter_mask = nla_get_u32(extfilt); 2882 } 2883 } 2884 2885 rcu_read_lock(); 2886 for_each_netdev_rcu(net, dev) { 2887 const struct net_device_ops *ops = dev->netdev_ops; 2888 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2889 2890 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 2891 if (idx >= cb->args[0] && 2892 br_dev->netdev_ops->ndo_bridge_getlink( 2893 skb, portid, seq, dev, filter_mask) < 0) 2894 break; 2895 idx++; 2896 } 2897 2898 if (ops->ndo_bridge_getlink) { 2899 if (idx >= cb->args[0] && 2900 ops->ndo_bridge_getlink(skb, portid, seq, dev, 2901 filter_mask) < 0) 2902 break; 2903 idx++; 2904 } 2905 } 2906 rcu_read_unlock(); 2907 cb->args[0] = idx; 2908 2909 return skb->len; 2910 } 2911 2912 static inline size_t bridge_nlmsg_size(void) 2913 { 2914 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 2915 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 2916 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 2917 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 2918 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 2919 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 2920 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 2921 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 2922 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 2923 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 2924 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 2925 } 2926 2927 static int rtnl_bridge_notify(struct net_device *dev) 2928 { 2929 struct net *net = dev_net(dev); 2930 struct sk_buff *skb; 2931 int err = -EOPNOTSUPP; 2932 2933 if (!dev->netdev_ops->ndo_bridge_getlink) 2934 return 0; 2935 2936 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 2937 if (!skb) { 2938 err = -ENOMEM; 2939 goto errout; 2940 } 2941 2942 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0); 2943 if (err < 0) 2944 goto errout; 2945 2946 if (!skb->len) 2947 goto errout; 2948 2949 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 2950 return 0; 2951 errout: 2952 WARN_ON(err == -EMSGSIZE); 2953 kfree_skb(skb); 2954 if (err) 2955 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2956 return err; 2957 } 2958 2959 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2960 { 2961 struct net *net = sock_net(skb->sk); 2962 struct ifinfomsg *ifm; 2963 struct net_device *dev; 2964 struct nlattr *br_spec, *attr = NULL; 2965 int rem, err = -EOPNOTSUPP; 2966 u16 flags = 0; 2967 bool have_flags = false; 2968 2969 if (nlmsg_len(nlh) < sizeof(*ifm)) 2970 return -EINVAL; 2971 2972 ifm = nlmsg_data(nlh); 2973 if (ifm->ifi_family != AF_BRIDGE) 2974 return -EPFNOSUPPORT; 2975 2976 dev = __dev_get_by_index(net, ifm->ifi_index); 2977 if (!dev) { 2978 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 2979 return -ENODEV; 2980 } 2981 2982 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 2983 if (br_spec) { 2984 nla_for_each_nested(attr, br_spec, rem) { 2985 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 2986 if (nla_len(attr) < sizeof(flags)) 2987 return -EINVAL; 2988 2989 have_flags = true; 2990 flags = nla_get_u16(attr); 2991 break; 2992 } 2993 } 2994 } 2995 2996 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 2997 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2998 2999 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3000 err = -EOPNOTSUPP; 3001 goto out; 3002 } 3003 3004 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3005 if (err) 3006 goto out; 3007 3008 flags &= ~BRIDGE_FLAGS_MASTER; 3009 } 3010 3011 if ((flags & BRIDGE_FLAGS_SELF)) { 3012 if (!dev->netdev_ops->ndo_bridge_setlink) 3013 err = -EOPNOTSUPP; 3014 else 3015 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3016 flags); 3017 if (!err) { 3018 flags &= ~BRIDGE_FLAGS_SELF; 3019 3020 /* Generate event to notify upper layer of bridge 3021 * change 3022 */ 3023 err = rtnl_bridge_notify(dev); 3024 } 3025 } 3026 3027 if (have_flags) 3028 memcpy(nla_data(attr), &flags, sizeof(flags)); 3029 out: 3030 return err; 3031 } 3032 3033 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3034 { 3035 struct net *net = sock_net(skb->sk); 3036 struct ifinfomsg *ifm; 3037 struct net_device *dev; 3038 struct nlattr *br_spec, *attr = NULL; 3039 int rem, err = -EOPNOTSUPP; 3040 u16 flags = 0; 3041 bool have_flags = false; 3042 3043 if (nlmsg_len(nlh) < sizeof(*ifm)) 3044 return -EINVAL; 3045 3046 ifm = nlmsg_data(nlh); 3047 if (ifm->ifi_family != AF_BRIDGE) 3048 return -EPFNOSUPPORT; 3049 3050 dev = __dev_get_by_index(net, ifm->ifi_index); 3051 if (!dev) { 3052 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3053 return -ENODEV; 3054 } 3055 3056 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3057 if (br_spec) { 3058 nla_for_each_nested(attr, br_spec, rem) { 3059 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3060 if (nla_len(attr) < sizeof(flags)) 3061 return -EINVAL; 3062 3063 have_flags = true; 3064 flags = nla_get_u16(attr); 3065 break; 3066 } 3067 } 3068 } 3069 3070 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3071 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3072 3073 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3074 err = -EOPNOTSUPP; 3075 goto out; 3076 } 3077 3078 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3079 if (err) 3080 goto out; 3081 3082 flags &= ~BRIDGE_FLAGS_MASTER; 3083 } 3084 3085 if ((flags & BRIDGE_FLAGS_SELF)) { 3086 if (!dev->netdev_ops->ndo_bridge_dellink) 3087 err = -EOPNOTSUPP; 3088 else 3089 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3090 flags); 3091 3092 if (!err) { 3093 flags &= ~BRIDGE_FLAGS_SELF; 3094 3095 /* Generate event to notify upper layer of bridge 3096 * change 3097 */ 3098 err = rtnl_bridge_notify(dev); 3099 } 3100 } 3101 3102 if (have_flags) 3103 memcpy(nla_data(attr), &flags, sizeof(flags)); 3104 out: 3105 return err; 3106 } 3107 3108 /* Process one rtnetlink message. */ 3109 3110 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3111 { 3112 struct net *net = sock_net(skb->sk); 3113 rtnl_doit_func doit; 3114 int sz_idx, kind; 3115 int family; 3116 int type; 3117 int err; 3118 3119 type = nlh->nlmsg_type; 3120 if (type > RTM_MAX) 3121 return -EOPNOTSUPP; 3122 3123 type -= RTM_BASE; 3124 3125 /* All the messages must have at least 1 byte length */ 3126 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3127 return 0; 3128 3129 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3130 sz_idx = type>>2; 3131 kind = type&3; 3132 3133 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 3134 return -EPERM; 3135 3136 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 3137 struct sock *rtnl; 3138 rtnl_dumpit_func dumpit; 3139 rtnl_calcit_func calcit; 3140 u16 min_dump_alloc = 0; 3141 3142 dumpit = rtnl_get_dumpit(family, type); 3143 if (dumpit == NULL) 3144 return -EOPNOTSUPP; 3145 calcit = rtnl_get_calcit(family, type); 3146 if (calcit) 3147 min_dump_alloc = calcit(skb, nlh); 3148 3149 __rtnl_unlock(); 3150 rtnl = net->rtnl; 3151 { 3152 struct netlink_dump_control c = { 3153 .dump = dumpit, 3154 .min_dump_alloc = min_dump_alloc, 3155 }; 3156 err = netlink_dump_start(rtnl, skb, nlh, &c); 3157 } 3158 rtnl_lock(); 3159 return err; 3160 } 3161 3162 doit = rtnl_get_doit(family, type); 3163 if (doit == NULL) 3164 return -EOPNOTSUPP; 3165 3166 return doit(skb, nlh); 3167 } 3168 3169 static void rtnetlink_rcv(struct sk_buff *skb) 3170 { 3171 rtnl_lock(); 3172 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 3173 rtnl_unlock(); 3174 } 3175 3176 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 3177 { 3178 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3179 3180 switch (event) { 3181 case NETDEV_UP: 3182 case NETDEV_DOWN: 3183 case NETDEV_PRE_UP: 3184 case NETDEV_POST_INIT: 3185 case NETDEV_REGISTER: 3186 case NETDEV_CHANGE: 3187 case NETDEV_PRE_TYPE_CHANGE: 3188 case NETDEV_GOING_DOWN: 3189 case NETDEV_UNREGISTER: 3190 case NETDEV_UNREGISTER_FINAL: 3191 case NETDEV_RELEASE: 3192 case NETDEV_JOIN: 3193 case NETDEV_BONDING_INFO: 3194 break; 3195 default: 3196 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 3197 break; 3198 } 3199 return NOTIFY_DONE; 3200 } 3201 3202 static struct notifier_block rtnetlink_dev_notifier = { 3203 .notifier_call = rtnetlink_event, 3204 }; 3205 3206 3207 static int __net_init rtnetlink_net_init(struct net *net) 3208 { 3209 struct sock *sk; 3210 struct netlink_kernel_cfg cfg = { 3211 .groups = RTNLGRP_MAX, 3212 .input = rtnetlink_rcv, 3213 .cb_mutex = &rtnl_mutex, 3214 .flags = NL_CFG_F_NONROOT_RECV, 3215 }; 3216 3217 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 3218 if (!sk) 3219 return -ENOMEM; 3220 net->rtnl = sk; 3221 return 0; 3222 } 3223 3224 static void __net_exit rtnetlink_net_exit(struct net *net) 3225 { 3226 netlink_kernel_release(net->rtnl); 3227 net->rtnl = NULL; 3228 } 3229 3230 static struct pernet_operations rtnetlink_net_ops = { 3231 .init = rtnetlink_net_init, 3232 .exit = rtnetlink_net_exit, 3233 }; 3234 3235 void __init rtnetlink_init(void) 3236 { 3237 if (register_pernet_subsys(&rtnetlink_net_ops)) 3238 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 3239 3240 register_netdevice_notifier(&rtnetlink_dev_notifier); 3241 3242 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 3243 rtnl_dump_ifinfo, rtnl_calcit); 3244 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 3245 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 3246 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 3247 3248 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 3249 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 3250 3251 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 3252 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 3253 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 3254 3255 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 3256 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 3257 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 3258 } 3259 3260