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