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