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/sock.h> 54 #include <net/pkt_sched.h> 55 #include <net/fib_rules.h> 56 #include <net/rtnetlink.h> 57 #include <net/net_namespace.h> 58 59 struct rtnl_link { 60 rtnl_doit_func doit; 61 rtnl_dumpit_func dumpit; 62 rtnl_calcit_func calcit; 63 }; 64 65 static DEFINE_MUTEX(rtnl_mutex); 66 67 void rtnl_lock(void) 68 { 69 mutex_lock(&rtnl_mutex); 70 } 71 EXPORT_SYMBOL(rtnl_lock); 72 73 void __rtnl_unlock(void) 74 { 75 mutex_unlock(&rtnl_mutex); 76 } 77 78 void rtnl_unlock(void) 79 { 80 /* This fellow will unlock it for us. */ 81 netdev_run_todo(); 82 } 83 EXPORT_SYMBOL(rtnl_unlock); 84 85 int rtnl_trylock(void) 86 { 87 return mutex_trylock(&rtnl_mutex); 88 } 89 EXPORT_SYMBOL(rtnl_trylock); 90 91 int rtnl_is_locked(void) 92 { 93 return mutex_is_locked(&rtnl_mutex); 94 } 95 EXPORT_SYMBOL(rtnl_is_locked); 96 97 #ifdef CONFIG_PROVE_LOCKING 98 int lockdep_rtnl_is_held(void) 99 { 100 return lockdep_is_held(&rtnl_mutex); 101 } 102 EXPORT_SYMBOL(lockdep_rtnl_is_held); 103 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 104 105 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 106 107 static inline int rtm_msgindex(int msgtype) 108 { 109 int msgindex = msgtype - RTM_BASE; 110 111 /* 112 * msgindex < 0 implies someone tried to register a netlink 113 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 114 * the message type has not been added to linux/rtnetlink.h 115 */ 116 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 117 118 return msgindex; 119 } 120 121 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 122 { 123 struct rtnl_link *tab; 124 125 if (protocol <= RTNL_FAMILY_MAX) 126 tab = rtnl_msg_handlers[protocol]; 127 else 128 tab = NULL; 129 130 if (tab == NULL || tab[msgindex].doit == NULL) 131 tab = rtnl_msg_handlers[PF_UNSPEC]; 132 133 return tab[msgindex].doit; 134 } 135 136 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 137 { 138 struct rtnl_link *tab; 139 140 if (protocol <= RTNL_FAMILY_MAX) 141 tab = rtnl_msg_handlers[protocol]; 142 else 143 tab = NULL; 144 145 if (tab == NULL || tab[msgindex].dumpit == NULL) 146 tab = rtnl_msg_handlers[PF_UNSPEC]; 147 148 return tab[msgindex].dumpit; 149 } 150 151 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 152 { 153 struct rtnl_link *tab; 154 155 if (protocol <= RTNL_FAMILY_MAX) 156 tab = rtnl_msg_handlers[protocol]; 157 else 158 tab = NULL; 159 160 if (tab == NULL || tab[msgindex].calcit == NULL) 161 tab = rtnl_msg_handlers[PF_UNSPEC]; 162 163 return tab[msgindex].calcit; 164 } 165 166 /** 167 * __rtnl_register - Register a rtnetlink message type 168 * @protocol: Protocol family or PF_UNSPEC 169 * @msgtype: rtnetlink message type 170 * @doit: Function pointer called for each request message 171 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 172 * @calcit: Function pointer to calc size of dump message 173 * 174 * Registers the specified function pointers (at least one of them has 175 * to be non-NULL) to be called whenever a request message for the 176 * specified protocol family and message type is received. 177 * 178 * The special protocol family PF_UNSPEC may be used to define fallback 179 * function pointers for the case when no entry for the specific protocol 180 * family exists. 181 * 182 * Returns 0 on success or a negative error code. 183 */ 184 int __rtnl_register(int protocol, int msgtype, 185 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 186 rtnl_calcit_func calcit) 187 { 188 struct rtnl_link *tab; 189 int msgindex; 190 191 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 192 msgindex = rtm_msgindex(msgtype); 193 194 tab = rtnl_msg_handlers[protocol]; 195 if (tab == NULL) { 196 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 197 if (tab == NULL) 198 return -ENOBUFS; 199 200 rtnl_msg_handlers[protocol] = tab; 201 } 202 203 if (doit) 204 tab[msgindex].doit = doit; 205 206 if (dumpit) 207 tab[msgindex].dumpit = dumpit; 208 209 if (calcit) 210 tab[msgindex].calcit = calcit; 211 212 return 0; 213 } 214 EXPORT_SYMBOL_GPL(__rtnl_register); 215 216 /** 217 * rtnl_register - Register a rtnetlink message type 218 * 219 * Identical to __rtnl_register() but panics on failure. This is useful 220 * as failure of this function is very unlikely, it can only happen due 221 * to lack of memory when allocating the chain to store all message 222 * handlers for a protocol. Meant for use in init functions where lack 223 * of memory implies no sense in continuing. 224 */ 225 void rtnl_register(int protocol, int msgtype, 226 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 227 rtnl_calcit_func calcit) 228 { 229 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 230 panic("Unable to register rtnetlink message handler, " 231 "protocol = %d, message type = %d\n", 232 protocol, msgtype); 233 } 234 EXPORT_SYMBOL_GPL(rtnl_register); 235 236 /** 237 * rtnl_unregister - Unregister a rtnetlink message type 238 * @protocol: Protocol family or PF_UNSPEC 239 * @msgtype: rtnetlink message type 240 * 241 * Returns 0 on success or a negative error code. 242 */ 243 int rtnl_unregister(int protocol, int msgtype) 244 { 245 int msgindex; 246 247 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 248 msgindex = rtm_msgindex(msgtype); 249 250 if (rtnl_msg_handlers[protocol] == NULL) 251 return -ENOENT; 252 253 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 254 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 255 256 return 0; 257 } 258 EXPORT_SYMBOL_GPL(rtnl_unregister); 259 260 /** 261 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 262 * @protocol : Protocol family or PF_UNSPEC 263 * 264 * Identical to calling rtnl_unregster() for all registered message types 265 * of a certain protocol family. 266 */ 267 void rtnl_unregister_all(int protocol) 268 { 269 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 270 271 kfree(rtnl_msg_handlers[protocol]); 272 rtnl_msg_handlers[protocol] = NULL; 273 } 274 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 275 276 static LIST_HEAD(link_ops); 277 278 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 279 { 280 const struct rtnl_link_ops *ops; 281 282 list_for_each_entry(ops, &link_ops, list) { 283 if (!strcmp(ops->kind, kind)) 284 return ops; 285 } 286 return NULL; 287 } 288 289 /** 290 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 291 * @ops: struct rtnl_link_ops * to register 292 * 293 * The caller must hold the rtnl_mutex. This function should be used 294 * by drivers that create devices during module initialization. It 295 * must be called before registering the devices. 296 * 297 * Returns 0 on success or a negative error code. 298 */ 299 int __rtnl_link_register(struct rtnl_link_ops *ops) 300 { 301 if (rtnl_link_ops_get(ops->kind)) 302 return -EEXIST; 303 304 /* The check for setup is here because if ops 305 * does not have that filled up, it is not possible 306 * to use the ops for creating device. So do not 307 * fill up dellink as well. That disables rtnl_dellink. 308 */ 309 if (ops->setup && !ops->dellink) 310 ops->dellink = unregister_netdevice_queue; 311 312 list_add_tail(&ops->list, &link_ops); 313 return 0; 314 } 315 EXPORT_SYMBOL_GPL(__rtnl_link_register); 316 317 /** 318 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 319 * @ops: struct rtnl_link_ops * to register 320 * 321 * Returns 0 on success or a negative error code. 322 */ 323 int rtnl_link_register(struct rtnl_link_ops *ops) 324 { 325 int err; 326 327 rtnl_lock(); 328 err = __rtnl_link_register(ops); 329 rtnl_unlock(); 330 return err; 331 } 332 EXPORT_SYMBOL_GPL(rtnl_link_register); 333 334 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 335 { 336 struct net_device *dev; 337 LIST_HEAD(list_kill); 338 339 for_each_netdev(net, dev) { 340 if (dev->rtnl_link_ops == ops) 341 ops->dellink(dev, &list_kill); 342 } 343 unregister_netdevice_many(&list_kill); 344 } 345 346 /** 347 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 348 * @ops: struct rtnl_link_ops * to unregister 349 * 350 * The caller must hold the rtnl_mutex. 351 */ 352 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 353 { 354 struct net *net; 355 356 for_each_net(net) { 357 __rtnl_kill_links(net, ops); 358 } 359 list_del(&ops->list); 360 } 361 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 362 363 /* Return with the rtnl_lock held when there are no network 364 * devices unregistering in any network namespace. 365 */ 366 static void rtnl_lock_unregistering_all(void) 367 { 368 struct net *net; 369 bool unregistering; 370 DEFINE_WAIT_FUNC(wait, woken_wake_function); 371 372 add_wait_queue(&netdev_unregistering_wq, &wait); 373 for (;;) { 374 unregistering = false; 375 rtnl_lock(); 376 for_each_net(net) { 377 if (net->dev_unreg_count > 0) { 378 unregistering = true; 379 break; 380 } 381 } 382 if (!unregistering) 383 break; 384 __rtnl_unlock(); 385 386 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 387 } 388 remove_wait_queue(&netdev_unregistering_wq, &wait); 389 } 390 391 /** 392 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 393 * @ops: struct rtnl_link_ops * to unregister 394 */ 395 void rtnl_link_unregister(struct rtnl_link_ops *ops) 396 { 397 /* Close the race with cleanup_net() */ 398 mutex_lock(&net_mutex); 399 rtnl_lock_unregistering_all(); 400 __rtnl_link_unregister(ops); 401 rtnl_unlock(); 402 mutex_unlock(&net_mutex); 403 } 404 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 405 406 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 407 { 408 struct net_device *master_dev; 409 const struct rtnl_link_ops *ops; 410 411 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 412 if (!master_dev) 413 return 0; 414 ops = master_dev->rtnl_link_ops; 415 if (!ops || !ops->get_slave_size) 416 return 0; 417 /* IFLA_INFO_SLAVE_DATA + nested data */ 418 return nla_total_size(sizeof(struct nlattr)) + 419 ops->get_slave_size(master_dev, dev); 420 } 421 422 static size_t rtnl_link_get_size(const struct net_device *dev) 423 { 424 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 425 size_t size; 426 427 if (!ops) 428 return 0; 429 430 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 431 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 432 433 if (ops->get_size) 434 /* IFLA_INFO_DATA + nested data */ 435 size += nla_total_size(sizeof(struct nlattr)) + 436 ops->get_size(dev); 437 438 if (ops->get_xstats_size) 439 /* IFLA_INFO_XSTATS */ 440 size += nla_total_size(ops->get_xstats_size(dev)); 441 442 size += rtnl_link_get_slave_info_data_size(dev); 443 444 return size; 445 } 446 447 static LIST_HEAD(rtnl_af_ops); 448 449 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 450 { 451 const struct rtnl_af_ops *ops; 452 453 list_for_each_entry(ops, &rtnl_af_ops, list) { 454 if (ops->family == family) 455 return ops; 456 } 457 458 return NULL; 459 } 460 461 /** 462 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 463 * @ops: struct rtnl_af_ops * to register 464 * 465 * Returns 0 on success or a negative error code. 466 */ 467 void rtnl_af_register(struct rtnl_af_ops *ops) 468 { 469 rtnl_lock(); 470 list_add_tail(&ops->list, &rtnl_af_ops); 471 rtnl_unlock(); 472 } 473 EXPORT_SYMBOL_GPL(rtnl_af_register); 474 475 /** 476 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 477 * @ops: struct rtnl_af_ops * to unregister 478 * 479 * The caller must hold the rtnl_mutex. 480 */ 481 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 482 { 483 list_del(&ops->list); 484 } 485 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 486 487 /** 488 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 489 * @ops: struct rtnl_af_ops * to unregister 490 */ 491 void rtnl_af_unregister(struct rtnl_af_ops *ops) 492 { 493 rtnl_lock(); 494 __rtnl_af_unregister(ops); 495 rtnl_unlock(); 496 } 497 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 498 499 static size_t rtnl_link_get_af_size(const struct net_device *dev) 500 { 501 struct rtnl_af_ops *af_ops; 502 size_t size; 503 504 /* IFLA_AF_SPEC */ 505 size = nla_total_size(sizeof(struct nlattr)); 506 507 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 508 if (af_ops->get_link_af_size) { 509 /* AF_* + nested data */ 510 size += nla_total_size(sizeof(struct nlattr)) + 511 af_ops->get_link_af_size(dev); 512 } 513 } 514 515 return size; 516 } 517 518 static bool rtnl_have_link_slave_info(const struct net_device *dev) 519 { 520 struct net_device *master_dev; 521 522 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 523 if (master_dev && master_dev->rtnl_link_ops) 524 return true; 525 return false; 526 } 527 528 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 529 const struct net_device *dev) 530 { 531 struct net_device *master_dev; 532 const struct rtnl_link_ops *ops; 533 struct nlattr *slave_data; 534 int err; 535 536 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 537 if (!master_dev) 538 return 0; 539 ops = master_dev->rtnl_link_ops; 540 if (!ops) 541 return 0; 542 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 543 return -EMSGSIZE; 544 if (ops->fill_slave_info) { 545 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 546 if (!slave_data) 547 return -EMSGSIZE; 548 err = ops->fill_slave_info(skb, master_dev, dev); 549 if (err < 0) 550 goto err_cancel_slave_data; 551 nla_nest_end(skb, slave_data); 552 } 553 return 0; 554 555 err_cancel_slave_data: 556 nla_nest_cancel(skb, slave_data); 557 return err; 558 } 559 560 static int rtnl_link_info_fill(struct sk_buff *skb, 561 const struct net_device *dev) 562 { 563 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 564 struct nlattr *data; 565 int err; 566 567 if (!ops) 568 return 0; 569 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 570 return -EMSGSIZE; 571 if (ops->fill_xstats) { 572 err = ops->fill_xstats(skb, dev); 573 if (err < 0) 574 return err; 575 } 576 if (ops->fill_info) { 577 data = nla_nest_start(skb, IFLA_INFO_DATA); 578 if (data == NULL) 579 return -EMSGSIZE; 580 err = ops->fill_info(skb, dev); 581 if (err < 0) 582 goto err_cancel_data; 583 nla_nest_end(skb, data); 584 } 585 return 0; 586 587 err_cancel_data: 588 nla_nest_cancel(skb, data); 589 return err; 590 } 591 592 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 593 { 594 struct nlattr *linkinfo; 595 int err = -EMSGSIZE; 596 597 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 598 if (linkinfo == NULL) 599 goto out; 600 601 err = rtnl_link_info_fill(skb, dev); 602 if (err < 0) 603 goto err_cancel_link; 604 605 err = rtnl_link_slave_info_fill(skb, dev); 606 if (err < 0) 607 goto err_cancel_link; 608 609 nla_nest_end(skb, linkinfo); 610 return 0; 611 612 err_cancel_link: 613 nla_nest_cancel(skb, linkinfo); 614 out: 615 return err; 616 } 617 618 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 619 { 620 struct sock *rtnl = net->rtnl; 621 int err = 0; 622 623 NETLINK_CB(skb).dst_group = group; 624 if (echo) 625 atomic_inc(&skb->users); 626 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 627 if (echo) 628 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 629 return err; 630 } 631 632 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 633 { 634 struct sock *rtnl = net->rtnl; 635 636 return nlmsg_unicast(rtnl, skb, pid); 637 } 638 EXPORT_SYMBOL(rtnl_unicast); 639 640 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 641 struct nlmsghdr *nlh, gfp_t flags) 642 { 643 struct sock *rtnl = net->rtnl; 644 int report = 0; 645 646 if (nlh) 647 report = nlmsg_report(nlh); 648 649 nlmsg_notify(rtnl, skb, pid, group, report, flags); 650 } 651 EXPORT_SYMBOL(rtnl_notify); 652 653 void rtnl_set_sk_err(struct net *net, u32 group, int error) 654 { 655 struct sock *rtnl = net->rtnl; 656 657 netlink_set_err(rtnl, 0, group, error); 658 } 659 EXPORT_SYMBOL(rtnl_set_sk_err); 660 661 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 662 { 663 struct nlattr *mx; 664 int i, valid = 0; 665 666 mx = nla_nest_start(skb, RTA_METRICS); 667 if (mx == NULL) 668 return -ENOBUFS; 669 670 for (i = 0; i < RTAX_MAX; i++) { 671 if (metrics[i]) { 672 valid++; 673 if (nla_put_u32(skb, i+1, metrics[i])) 674 goto nla_put_failure; 675 } 676 } 677 678 if (!valid) { 679 nla_nest_cancel(skb, mx); 680 return 0; 681 } 682 683 return nla_nest_end(skb, mx); 684 685 nla_put_failure: 686 nla_nest_cancel(skb, mx); 687 return -EMSGSIZE; 688 } 689 EXPORT_SYMBOL(rtnetlink_put_metrics); 690 691 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 692 long expires, u32 error) 693 { 694 struct rta_cacheinfo ci = { 695 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 696 .rta_used = dst->__use, 697 .rta_clntref = atomic_read(&(dst->__refcnt)), 698 .rta_error = error, 699 .rta_id = id, 700 }; 701 702 if (expires) { 703 unsigned long clock; 704 705 clock = jiffies_to_clock_t(abs(expires)); 706 clock = min_t(unsigned long, clock, INT_MAX); 707 ci.rta_expires = (expires > 0) ? clock : -clock; 708 } 709 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 710 } 711 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 712 713 static void set_operstate(struct net_device *dev, unsigned char transition) 714 { 715 unsigned char operstate = dev->operstate; 716 717 switch (transition) { 718 case IF_OPER_UP: 719 if ((operstate == IF_OPER_DORMANT || 720 operstate == IF_OPER_UNKNOWN) && 721 !netif_dormant(dev)) 722 operstate = IF_OPER_UP; 723 break; 724 725 case IF_OPER_DORMANT: 726 if (operstate == IF_OPER_UP || 727 operstate == IF_OPER_UNKNOWN) 728 operstate = IF_OPER_DORMANT; 729 break; 730 } 731 732 if (dev->operstate != operstate) { 733 write_lock_bh(&dev_base_lock); 734 dev->operstate = operstate; 735 write_unlock_bh(&dev_base_lock); 736 netdev_state_change(dev); 737 } 738 } 739 740 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 741 { 742 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 743 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 744 } 745 746 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 747 const struct ifinfomsg *ifm) 748 { 749 unsigned int flags = ifm->ifi_flags; 750 751 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 752 if (ifm->ifi_change) 753 flags = (flags & ifm->ifi_change) | 754 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 755 756 return flags; 757 } 758 759 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 760 const struct rtnl_link_stats64 *b) 761 { 762 a->rx_packets = b->rx_packets; 763 a->tx_packets = b->tx_packets; 764 a->rx_bytes = b->rx_bytes; 765 a->tx_bytes = b->tx_bytes; 766 a->rx_errors = b->rx_errors; 767 a->tx_errors = b->tx_errors; 768 a->rx_dropped = b->rx_dropped; 769 a->tx_dropped = b->tx_dropped; 770 771 a->multicast = b->multicast; 772 a->collisions = b->collisions; 773 774 a->rx_length_errors = b->rx_length_errors; 775 a->rx_over_errors = b->rx_over_errors; 776 a->rx_crc_errors = b->rx_crc_errors; 777 a->rx_frame_errors = b->rx_frame_errors; 778 a->rx_fifo_errors = b->rx_fifo_errors; 779 a->rx_missed_errors = b->rx_missed_errors; 780 781 a->tx_aborted_errors = b->tx_aborted_errors; 782 a->tx_carrier_errors = b->tx_carrier_errors; 783 a->tx_fifo_errors = b->tx_fifo_errors; 784 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 785 a->tx_window_errors = b->tx_window_errors; 786 787 a->rx_compressed = b->rx_compressed; 788 a->tx_compressed = b->tx_compressed; 789 } 790 791 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) 792 { 793 memcpy(v, b, sizeof(*b)); 794 } 795 796 /* All VF info */ 797 static inline int rtnl_vfinfo_size(const struct net_device *dev, 798 u32 ext_filter_mask) 799 { 800 if (dev->dev.parent && dev_is_pci(dev->dev.parent) && 801 (ext_filter_mask & RTEXT_FILTER_VF)) { 802 int num_vfs = dev_num_vf(dev->dev.parent); 803 size_t size = nla_total_size(sizeof(struct nlattr)); 804 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 805 size += num_vfs * 806 (nla_total_size(sizeof(struct ifla_vf_mac)) + 807 nla_total_size(sizeof(struct ifla_vf_vlan)) + 808 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 809 nla_total_size(sizeof(struct ifla_vf_rate)) + 810 nla_total_size(sizeof(struct ifla_vf_link_state))); 811 return size; 812 } else 813 return 0; 814 } 815 816 static size_t rtnl_port_size(const struct net_device *dev, 817 u32 ext_filter_mask) 818 { 819 size_t port_size = nla_total_size(4) /* PORT_VF */ 820 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 821 + nla_total_size(sizeof(struct ifla_port_vsi)) 822 /* PORT_VSI_TYPE */ 823 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 824 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 825 + nla_total_size(1) /* PROT_VDP_REQUEST */ 826 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 827 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 828 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 829 + port_size; 830 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 831 + port_size; 832 833 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 834 !(ext_filter_mask & RTEXT_FILTER_VF)) 835 return 0; 836 if (dev_num_vf(dev->dev.parent)) 837 return port_self_size + vf_ports_size + 838 vf_port_size * dev_num_vf(dev->dev.parent); 839 else 840 return port_self_size; 841 } 842 843 static noinline size_t if_nlmsg_size(const struct net_device *dev, 844 u32 ext_filter_mask) 845 { 846 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 847 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 848 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 849 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 850 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 851 + nla_total_size(sizeof(struct rtnl_link_stats)) 852 + nla_total_size(sizeof(struct rtnl_link_stats64)) 853 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 854 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 855 + nla_total_size(4) /* IFLA_TXQLEN */ 856 + nla_total_size(4) /* IFLA_WEIGHT */ 857 + nla_total_size(4) /* IFLA_MTU */ 858 + nla_total_size(4) /* IFLA_LINK */ 859 + nla_total_size(4) /* IFLA_MASTER */ 860 + nla_total_size(1) /* IFLA_CARRIER */ 861 + nla_total_size(4) /* IFLA_PROMISCUITY */ 862 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 863 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 864 + nla_total_size(1) /* IFLA_OPERSTATE */ 865 + nla_total_size(1) /* IFLA_LINKMODE */ 866 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 867 + nla_total_size(ext_filter_mask 868 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 869 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 870 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 871 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 872 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */ 873 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 874 + nla_total_size(MAX_PHYS_ITEM_ID_LEN); /* IFLA_PHYS_SWITCH_ID */ 875 } 876 877 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 878 { 879 struct nlattr *vf_ports; 880 struct nlattr *vf_port; 881 int vf; 882 int err; 883 884 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 885 if (!vf_ports) 886 return -EMSGSIZE; 887 888 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 889 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 890 if (!vf_port) 891 goto nla_put_failure; 892 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 893 goto nla_put_failure; 894 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 895 if (err == -EMSGSIZE) 896 goto nla_put_failure; 897 if (err) { 898 nla_nest_cancel(skb, vf_port); 899 continue; 900 } 901 nla_nest_end(skb, vf_port); 902 } 903 904 nla_nest_end(skb, vf_ports); 905 906 return 0; 907 908 nla_put_failure: 909 nla_nest_cancel(skb, vf_ports); 910 return -EMSGSIZE; 911 } 912 913 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 914 { 915 struct nlattr *port_self; 916 int err; 917 918 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 919 if (!port_self) 920 return -EMSGSIZE; 921 922 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 923 if (err) { 924 nla_nest_cancel(skb, port_self); 925 return (err == -EMSGSIZE) ? err : 0; 926 } 927 928 nla_nest_end(skb, port_self); 929 930 return 0; 931 } 932 933 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 934 u32 ext_filter_mask) 935 { 936 int err; 937 938 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 939 !(ext_filter_mask & RTEXT_FILTER_VF)) 940 return 0; 941 942 err = rtnl_port_self_fill(skb, dev); 943 if (err) 944 return err; 945 946 if (dev_num_vf(dev->dev.parent)) { 947 err = rtnl_vf_ports_fill(skb, dev); 948 if (err) 949 return err; 950 } 951 952 return 0; 953 } 954 955 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 956 { 957 int err; 958 struct netdev_phys_item_id ppid; 959 960 err = dev_get_phys_port_id(dev, &ppid); 961 if (err) { 962 if (err == -EOPNOTSUPP) 963 return 0; 964 return err; 965 } 966 967 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 968 return -EMSGSIZE; 969 970 return 0; 971 } 972 973 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 974 { 975 int err; 976 struct netdev_phys_item_id psid; 977 978 err = netdev_switch_parent_id_get(dev, &psid); 979 if (err) { 980 if (err == -EOPNOTSUPP) 981 return 0; 982 return err; 983 } 984 985 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, psid.id_len, psid.id)) 986 return -EMSGSIZE; 987 988 return 0; 989 } 990 991 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 992 int type, u32 pid, u32 seq, u32 change, 993 unsigned int flags, u32 ext_filter_mask) 994 { 995 struct ifinfomsg *ifm; 996 struct nlmsghdr *nlh; 997 struct rtnl_link_stats64 temp; 998 const struct rtnl_link_stats64 *stats; 999 struct nlattr *attr, *af_spec; 1000 struct rtnl_af_ops *af_ops; 1001 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1002 1003 ASSERT_RTNL(); 1004 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1005 if (nlh == NULL) 1006 return -EMSGSIZE; 1007 1008 ifm = nlmsg_data(nlh); 1009 ifm->ifi_family = AF_UNSPEC; 1010 ifm->__ifi_pad = 0; 1011 ifm->ifi_type = dev->type; 1012 ifm->ifi_index = dev->ifindex; 1013 ifm->ifi_flags = dev_get_flags(dev); 1014 ifm->ifi_change = change; 1015 1016 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1017 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1018 nla_put_u8(skb, IFLA_OPERSTATE, 1019 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1020 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1021 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1022 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1023 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1024 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1025 #ifdef CONFIG_RPS 1026 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1027 #endif 1028 (dev->ifindex != dev->iflink && 1029 nla_put_u32(skb, IFLA_LINK, dev->iflink)) || 1030 (upper_dev && 1031 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1032 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1033 (dev->qdisc && 1034 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1035 (dev->ifalias && 1036 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1037 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1038 atomic_read(&dev->carrier_changes))) 1039 goto nla_put_failure; 1040 1041 if (1) { 1042 struct rtnl_link_ifmap map = { 1043 .mem_start = dev->mem_start, 1044 .mem_end = dev->mem_end, 1045 .base_addr = dev->base_addr, 1046 .irq = dev->irq, 1047 .dma = dev->dma, 1048 .port = dev->if_port, 1049 }; 1050 if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) 1051 goto nla_put_failure; 1052 } 1053 1054 if (dev->addr_len) { 1055 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1056 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1057 goto nla_put_failure; 1058 } 1059 1060 if (rtnl_phys_port_id_fill(skb, dev)) 1061 goto nla_put_failure; 1062 1063 if (rtnl_phys_switch_id_fill(skb, dev)) 1064 goto nla_put_failure; 1065 1066 attr = nla_reserve(skb, IFLA_STATS, 1067 sizeof(struct rtnl_link_stats)); 1068 if (attr == NULL) 1069 goto nla_put_failure; 1070 1071 stats = dev_get_stats(dev, &temp); 1072 copy_rtnl_link_stats(nla_data(attr), stats); 1073 1074 attr = nla_reserve(skb, IFLA_STATS64, 1075 sizeof(struct rtnl_link_stats64)); 1076 if (attr == NULL) 1077 goto nla_put_failure; 1078 copy_rtnl_link_stats64(nla_data(attr), stats); 1079 1080 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1081 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1082 goto nla_put_failure; 1083 1084 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent 1085 && (ext_filter_mask & RTEXT_FILTER_VF)) { 1086 int i; 1087 1088 struct nlattr *vfinfo, *vf; 1089 int num_vfs = dev_num_vf(dev->dev.parent); 1090 1091 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1092 if (!vfinfo) 1093 goto nla_put_failure; 1094 for (i = 0; i < num_vfs; i++) { 1095 struct ifla_vf_info ivi; 1096 struct ifla_vf_mac vf_mac; 1097 struct ifla_vf_vlan vf_vlan; 1098 struct ifla_vf_rate vf_rate; 1099 struct ifla_vf_tx_rate vf_tx_rate; 1100 struct ifla_vf_spoofchk vf_spoofchk; 1101 struct ifla_vf_link_state vf_linkstate; 1102 1103 /* 1104 * Not all SR-IOV capable drivers support the 1105 * spoofcheck query. Preset to -1 so the user 1106 * space tool can detect that the driver didn't 1107 * report anything. 1108 */ 1109 ivi.spoofchk = -1; 1110 memset(ivi.mac, 0, sizeof(ivi.mac)); 1111 /* The default value for VF link state is "auto" 1112 * IFLA_VF_LINK_STATE_AUTO which equals zero 1113 */ 1114 ivi.linkstate = 0; 1115 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) 1116 break; 1117 vf_mac.vf = 1118 vf_vlan.vf = 1119 vf_rate.vf = 1120 vf_tx_rate.vf = 1121 vf_spoofchk.vf = 1122 vf_linkstate.vf = ivi.vf; 1123 1124 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1125 vf_vlan.vlan = ivi.vlan; 1126 vf_vlan.qos = ivi.qos; 1127 vf_tx_rate.rate = ivi.max_tx_rate; 1128 vf_rate.min_tx_rate = ivi.min_tx_rate; 1129 vf_rate.max_tx_rate = ivi.max_tx_rate; 1130 vf_spoofchk.setting = ivi.spoofchk; 1131 vf_linkstate.link_state = ivi.linkstate; 1132 vf = nla_nest_start(skb, IFLA_VF_INFO); 1133 if (!vf) { 1134 nla_nest_cancel(skb, vfinfo); 1135 goto nla_put_failure; 1136 } 1137 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1138 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1139 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1140 &vf_rate) || 1141 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1142 &vf_tx_rate) || 1143 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1144 &vf_spoofchk) || 1145 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1146 &vf_linkstate)) 1147 goto nla_put_failure; 1148 nla_nest_end(skb, vf); 1149 } 1150 nla_nest_end(skb, vfinfo); 1151 } 1152 1153 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1154 goto nla_put_failure; 1155 1156 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1157 if (rtnl_link_fill(skb, dev) < 0) 1158 goto nla_put_failure; 1159 } 1160 1161 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1162 goto nla_put_failure; 1163 1164 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1165 if (af_ops->fill_link_af) { 1166 struct nlattr *af; 1167 int err; 1168 1169 if (!(af = nla_nest_start(skb, af_ops->family))) 1170 goto nla_put_failure; 1171 1172 err = af_ops->fill_link_af(skb, dev); 1173 1174 /* 1175 * Caller may return ENODATA to indicate that there 1176 * was no data to be dumped. This is not an error, it 1177 * means we should trim the attribute header and 1178 * continue. 1179 */ 1180 if (err == -ENODATA) 1181 nla_nest_cancel(skb, af); 1182 else if (err < 0) 1183 goto nla_put_failure; 1184 1185 nla_nest_end(skb, af); 1186 } 1187 } 1188 1189 nla_nest_end(skb, af_spec); 1190 1191 return nlmsg_end(skb, nlh); 1192 1193 nla_put_failure: 1194 nlmsg_cancel(skb, nlh); 1195 return -EMSGSIZE; 1196 } 1197 1198 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1199 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1200 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1201 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1202 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1203 [IFLA_MTU] = { .type = NLA_U32 }, 1204 [IFLA_LINK] = { .type = NLA_U32 }, 1205 [IFLA_MASTER] = { .type = NLA_U32 }, 1206 [IFLA_CARRIER] = { .type = NLA_U8 }, 1207 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1208 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1209 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1210 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1211 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1212 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1213 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1214 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1215 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1216 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1217 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1218 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1219 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1220 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1221 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1222 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1223 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1224 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1225 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1226 }; 1227 1228 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1229 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1230 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1231 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1232 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1233 }; 1234 1235 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { 1236 [IFLA_VF_INFO] = { .type = NLA_NESTED }, 1237 }; 1238 1239 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1240 [IFLA_VF_MAC] = { .type = NLA_BINARY, 1241 .len = sizeof(struct ifla_vf_mac) }, 1242 [IFLA_VF_VLAN] = { .type = NLA_BINARY, 1243 .len = sizeof(struct ifla_vf_vlan) }, 1244 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, 1245 .len = sizeof(struct ifla_vf_tx_rate) }, 1246 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY, 1247 .len = sizeof(struct ifla_vf_spoofchk) }, 1248 [IFLA_VF_RATE] = { .type = NLA_BINARY, 1249 .len = sizeof(struct ifla_vf_rate) }, 1250 [IFLA_VF_LINK_STATE] = { .type = NLA_BINARY, 1251 .len = sizeof(struct ifla_vf_link_state) }, 1252 }; 1253 1254 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1255 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1256 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1257 .len = PORT_PROFILE_MAX }, 1258 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1259 .len = sizeof(struct ifla_port_vsi)}, 1260 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1261 .len = PORT_UUID_MAX }, 1262 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1263 .len = PORT_UUID_MAX }, 1264 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1265 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1266 }; 1267 1268 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1269 { 1270 struct net *net = sock_net(skb->sk); 1271 int h, s_h; 1272 int idx = 0, s_idx; 1273 struct net_device *dev; 1274 struct hlist_head *head; 1275 struct nlattr *tb[IFLA_MAX+1]; 1276 u32 ext_filter_mask = 0; 1277 int err; 1278 int hdrlen; 1279 1280 s_h = cb->args[0]; 1281 s_idx = cb->args[1]; 1282 1283 rcu_read_lock(); 1284 cb->seq = net->dev_base_seq; 1285 1286 /* A hack to preserve kernel<->userspace interface. 1287 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1288 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1289 * what iproute2 < v3.9.0 used. 1290 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1291 * attribute, its netlink message is shorter than struct ifinfomsg. 1292 */ 1293 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1294 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1295 1296 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1297 1298 if (tb[IFLA_EXT_MASK]) 1299 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1300 } 1301 1302 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1303 idx = 0; 1304 head = &net->dev_index_head[h]; 1305 hlist_for_each_entry_rcu(dev, head, index_hlist) { 1306 if (idx < s_idx) 1307 goto cont; 1308 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1309 NETLINK_CB(cb->skb).portid, 1310 cb->nlh->nlmsg_seq, 0, 1311 NLM_F_MULTI, 1312 ext_filter_mask); 1313 /* If we ran out of room on the first message, 1314 * we're in trouble 1315 */ 1316 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1317 1318 if (err <= 0) 1319 goto out; 1320 1321 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1322 cont: 1323 idx++; 1324 } 1325 } 1326 out: 1327 rcu_read_unlock(); 1328 cb->args[1] = idx; 1329 cb->args[0] = h; 1330 1331 return skb->len; 1332 } 1333 1334 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1335 { 1336 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1337 } 1338 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1339 1340 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1341 { 1342 struct net *net; 1343 /* Examine the link attributes and figure out which 1344 * network namespace we are talking about. 1345 */ 1346 if (tb[IFLA_NET_NS_PID]) 1347 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1348 else if (tb[IFLA_NET_NS_FD]) 1349 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1350 else 1351 net = get_net(src_net); 1352 return net; 1353 } 1354 EXPORT_SYMBOL(rtnl_link_get_net); 1355 1356 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1357 { 1358 if (dev) { 1359 if (tb[IFLA_ADDRESS] && 1360 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1361 return -EINVAL; 1362 1363 if (tb[IFLA_BROADCAST] && 1364 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1365 return -EINVAL; 1366 } 1367 1368 if (tb[IFLA_AF_SPEC]) { 1369 struct nlattr *af; 1370 int rem, err; 1371 1372 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1373 const struct rtnl_af_ops *af_ops; 1374 1375 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1376 return -EAFNOSUPPORT; 1377 1378 if (!af_ops->set_link_af) 1379 return -EOPNOTSUPP; 1380 1381 if (af_ops->validate_link_af) { 1382 err = af_ops->validate_link_af(dev, af); 1383 if (err < 0) 1384 return err; 1385 } 1386 } 1387 } 1388 1389 return 0; 1390 } 1391 1392 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) 1393 { 1394 int rem, err = -EINVAL; 1395 struct nlattr *vf; 1396 const struct net_device_ops *ops = dev->netdev_ops; 1397 1398 nla_for_each_nested(vf, attr, rem) { 1399 switch (nla_type(vf)) { 1400 case IFLA_VF_MAC: { 1401 struct ifla_vf_mac *ivm; 1402 ivm = nla_data(vf); 1403 err = -EOPNOTSUPP; 1404 if (ops->ndo_set_vf_mac) 1405 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1406 ivm->mac); 1407 break; 1408 } 1409 case IFLA_VF_VLAN: { 1410 struct ifla_vf_vlan *ivv; 1411 ivv = nla_data(vf); 1412 err = -EOPNOTSUPP; 1413 if (ops->ndo_set_vf_vlan) 1414 err = ops->ndo_set_vf_vlan(dev, ivv->vf, 1415 ivv->vlan, 1416 ivv->qos); 1417 break; 1418 } 1419 case IFLA_VF_TX_RATE: { 1420 struct ifla_vf_tx_rate *ivt; 1421 struct ifla_vf_info ivf; 1422 ivt = nla_data(vf); 1423 err = -EOPNOTSUPP; 1424 if (ops->ndo_get_vf_config) 1425 err = ops->ndo_get_vf_config(dev, ivt->vf, 1426 &ivf); 1427 if (err) 1428 break; 1429 err = -EOPNOTSUPP; 1430 if (ops->ndo_set_vf_rate) 1431 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1432 ivf.min_tx_rate, 1433 ivt->rate); 1434 break; 1435 } 1436 case IFLA_VF_RATE: { 1437 struct ifla_vf_rate *ivt; 1438 ivt = nla_data(vf); 1439 err = -EOPNOTSUPP; 1440 if (ops->ndo_set_vf_rate) 1441 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1442 ivt->min_tx_rate, 1443 ivt->max_tx_rate); 1444 break; 1445 } 1446 case IFLA_VF_SPOOFCHK: { 1447 struct ifla_vf_spoofchk *ivs; 1448 ivs = nla_data(vf); 1449 err = -EOPNOTSUPP; 1450 if (ops->ndo_set_vf_spoofchk) 1451 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1452 ivs->setting); 1453 break; 1454 } 1455 case IFLA_VF_LINK_STATE: { 1456 struct ifla_vf_link_state *ivl; 1457 ivl = nla_data(vf); 1458 err = -EOPNOTSUPP; 1459 if (ops->ndo_set_vf_link_state) 1460 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1461 ivl->link_state); 1462 break; 1463 } 1464 default: 1465 err = -EINVAL; 1466 break; 1467 } 1468 if (err) 1469 break; 1470 } 1471 return err; 1472 } 1473 1474 static int do_set_master(struct net_device *dev, int ifindex) 1475 { 1476 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1477 const struct net_device_ops *ops; 1478 int err; 1479 1480 if (upper_dev) { 1481 if (upper_dev->ifindex == ifindex) 1482 return 0; 1483 ops = upper_dev->netdev_ops; 1484 if (ops->ndo_del_slave) { 1485 err = ops->ndo_del_slave(upper_dev, dev); 1486 if (err) 1487 return err; 1488 } else { 1489 return -EOPNOTSUPP; 1490 } 1491 } 1492 1493 if (ifindex) { 1494 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1495 if (!upper_dev) 1496 return -EINVAL; 1497 ops = upper_dev->netdev_ops; 1498 if (ops->ndo_add_slave) { 1499 err = ops->ndo_add_slave(upper_dev, dev); 1500 if (err) 1501 return err; 1502 } else { 1503 return -EOPNOTSUPP; 1504 } 1505 } 1506 return 0; 1507 } 1508 1509 #define DO_SETLINK_MODIFIED 0x01 1510 /* notify flag means notify + modified. */ 1511 #define DO_SETLINK_NOTIFY 0x03 1512 static int do_setlink(const struct sk_buff *skb, 1513 struct net_device *dev, struct ifinfomsg *ifm, 1514 struct nlattr **tb, char *ifname, int status) 1515 { 1516 const struct net_device_ops *ops = dev->netdev_ops; 1517 int err; 1518 1519 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1520 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1521 if (IS_ERR(net)) { 1522 err = PTR_ERR(net); 1523 goto errout; 1524 } 1525 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1526 put_net(net); 1527 err = -EPERM; 1528 goto errout; 1529 } 1530 err = dev_change_net_namespace(dev, net, ifname); 1531 put_net(net); 1532 if (err) 1533 goto errout; 1534 status |= DO_SETLINK_MODIFIED; 1535 } 1536 1537 if (tb[IFLA_MAP]) { 1538 struct rtnl_link_ifmap *u_map; 1539 struct ifmap k_map; 1540 1541 if (!ops->ndo_set_config) { 1542 err = -EOPNOTSUPP; 1543 goto errout; 1544 } 1545 1546 if (!netif_device_present(dev)) { 1547 err = -ENODEV; 1548 goto errout; 1549 } 1550 1551 u_map = nla_data(tb[IFLA_MAP]); 1552 k_map.mem_start = (unsigned long) u_map->mem_start; 1553 k_map.mem_end = (unsigned long) u_map->mem_end; 1554 k_map.base_addr = (unsigned short) u_map->base_addr; 1555 k_map.irq = (unsigned char) u_map->irq; 1556 k_map.dma = (unsigned char) u_map->dma; 1557 k_map.port = (unsigned char) u_map->port; 1558 1559 err = ops->ndo_set_config(dev, &k_map); 1560 if (err < 0) 1561 goto errout; 1562 1563 status |= DO_SETLINK_NOTIFY; 1564 } 1565 1566 if (tb[IFLA_ADDRESS]) { 1567 struct sockaddr *sa; 1568 int len; 1569 1570 len = sizeof(sa_family_t) + dev->addr_len; 1571 sa = kmalloc(len, GFP_KERNEL); 1572 if (!sa) { 1573 err = -ENOMEM; 1574 goto errout; 1575 } 1576 sa->sa_family = dev->type; 1577 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1578 dev->addr_len); 1579 err = dev_set_mac_address(dev, sa); 1580 kfree(sa); 1581 if (err) 1582 goto errout; 1583 status |= DO_SETLINK_MODIFIED; 1584 } 1585 1586 if (tb[IFLA_MTU]) { 1587 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1588 if (err < 0) 1589 goto errout; 1590 status |= DO_SETLINK_MODIFIED; 1591 } 1592 1593 if (tb[IFLA_GROUP]) { 1594 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1595 status |= DO_SETLINK_NOTIFY; 1596 } 1597 1598 /* 1599 * Interface selected by interface index but interface 1600 * name provided implies that a name change has been 1601 * requested. 1602 */ 1603 if (ifm->ifi_index > 0 && ifname[0]) { 1604 err = dev_change_name(dev, ifname); 1605 if (err < 0) 1606 goto errout; 1607 status |= DO_SETLINK_MODIFIED; 1608 } 1609 1610 if (tb[IFLA_IFALIAS]) { 1611 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1612 nla_len(tb[IFLA_IFALIAS])); 1613 if (err < 0) 1614 goto errout; 1615 status |= DO_SETLINK_NOTIFY; 1616 } 1617 1618 if (tb[IFLA_BROADCAST]) { 1619 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1620 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1621 } 1622 1623 if (ifm->ifi_flags || ifm->ifi_change) { 1624 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1625 if (err < 0) 1626 goto errout; 1627 } 1628 1629 if (tb[IFLA_MASTER]) { 1630 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1631 if (err) 1632 goto errout; 1633 status |= DO_SETLINK_MODIFIED; 1634 } 1635 1636 if (tb[IFLA_CARRIER]) { 1637 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 1638 if (err) 1639 goto errout; 1640 status |= DO_SETLINK_MODIFIED; 1641 } 1642 1643 if (tb[IFLA_TXQLEN]) { 1644 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 1645 1646 if (dev->tx_queue_len ^ value) 1647 status |= DO_SETLINK_NOTIFY; 1648 1649 dev->tx_queue_len = value; 1650 } 1651 1652 if (tb[IFLA_OPERSTATE]) 1653 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1654 1655 if (tb[IFLA_LINKMODE]) { 1656 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 1657 1658 write_lock_bh(&dev_base_lock); 1659 if (dev->link_mode ^ value) 1660 status |= DO_SETLINK_NOTIFY; 1661 dev->link_mode = value; 1662 write_unlock_bh(&dev_base_lock); 1663 } 1664 1665 if (tb[IFLA_VFINFO_LIST]) { 1666 struct nlattr *attr; 1667 int rem; 1668 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1669 if (nla_type(attr) != IFLA_VF_INFO) { 1670 err = -EINVAL; 1671 goto errout; 1672 } 1673 err = do_setvfinfo(dev, attr); 1674 if (err < 0) 1675 goto errout; 1676 status |= DO_SETLINK_NOTIFY; 1677 } 1678 } 1679 err = 0; 1680 1681 if (tb[IFLA_VF_PORTS]) { 1682 struct nlattr *port[IFLA_PORT_MAX+1]; 1683 struct nlattr *attr; 1684 int vf; 1685 int rem; 1686 1687 err = -EOPNOTSUPP; 1688 if (!ops->ndo_set_vf_port) 1689 goto errout; 1690 1691 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1692 if (nla_type(attr) != IFLA_VF_PORT) 1693 continue; 1694 err = nla_parse_nested(port, IFLA_PORT_MAX, 1695 attr, ifla_port_policy); 1696 if (err < 0) 1697 goto errout; 1698 if (!port[IFLA_PORT_VF]) { 1699 err = -EOPNOTSUPP; 1700 goto errout; 1701 } 1702 vf = nla_get_u32(port[IFLA_PORT_VF]); 1703 err = ops->ndo_set_vf_port(dev, vf, port); 1704 if (err < 0) 1705 goto errout; 1706 status |= DO_SETLINK_NOTIFY; 1707 } 1708 } 1709 err = 0; 1710 1711 if (tb[IFLA_PORT_SELF]) { 1712 struct nlattr *port[IFLA_PORT_MAX+1]; 1713 1714 err = nla_parse_nested(port, IFLA_PORT_MAX, 1715 tb[IFLA_PORT_SELF], ifla_port_policy); 1716 if (err < 0) 1717 goto errout; 1718 1719 err = -EOPNOTSUPP; 1720 if (ops->ndo_set_vf_port) 1721 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1722 if (err < 0) 1723 goto errout; 1724 status |= DO_SETLINK_NOTIFY; 1725 } 1726 1727 if (tb[IFLA_AF_SPEC]) { 1728 struct nlattr *af; 1729 int rem; 1730 1731 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1732 const struct rtnl_af_ops *af_ops; 1733 1734 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1735 BUG(); 1736 1737 err = af_ops->set_link_af(dev, af); 1738 if (err < 0) 1739 goto errout; 1740 1741 status |= DO_SETLINK_NOTIFY; 1742 } 1743 } 1744 err = 0; 1745 1746 errout: 1747 if (status & DO_SETLINK_MODIFIED) { 1748 if (status & DO_SETLINK_NOTIFY) 1749 netdev_state_change(dev); 1750 1751 if (err < 0) 1752 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", 1753 dev->name); 1754 } 1755 1756 return err; 1757 } 1758 1759 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 1760 { 1761 struct net *net = sock_net(skb->sk); 1762 struct ifinfomsg *ifm; 1763 struct net_device *dev; 1764 int err; 1765 struct nlattr *tb[IFLA_MAX+1]; 1766 char ifname[IFNAMSIZ]; 1767 1768 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1769 if (err < 0) 1770 goto errout; 1771 1772 if (tb[IFLA_IFNAME]) 1773 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1774 else 1775 ifname[0] = '\0'; 1776 1777 err = -EINVAL; 1778 ifm = nlmsg_data(nlh); 1779 if (ifm->ifi_index > 0) 1780 dev = __dev_get_by_index(net, ifm->ifi_index); 1781 else if (tb[IFLA_IFNAME]) 1782 dev = __dev_get_by_name(net, ifname); 1783 else 1784 goto errout; 1785 1786 if (dev == NULL) { 1787 err = -ENODEV; 1788 goto errout; 1789 } 1790 1791 err = validate_linkmsg(dev, tb); 1792 if (err < 0) 1793 goto errout; 1794 1795 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 1796 errout: 1797 return err; 1798 } 1799 1800 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 1801 { 1802 struct net *net = sock_net(skb->sk); 1803 const struct rtnl_link_ops *ops; 1804 struct net_device *dev; 1805 struct ifinfomsg *ifm; 1806 char ifname[IFNAMSIZ]; 1807 struct nlattr *tb[IFLA_MAX+1]; 1808 int err; 1809 LIST_HEAD(list_kill); 1810 1811 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1812 if (err < 0) 1813 return err; 1814 1815 if (tb[IFLA_IFNAME]) 1816 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1817 1818 ifm = nlmsg_data(nlh); 1819 if (ifm->ifi_index > 0) 1820 dev = __dev_get_by_index(net, ifm->ifi_index); 1821 else if (tb[IFLA_IFNAME]) 1822 dev = __dev_get_by_name(net, ifname); 1823 else 1824 return -EINVAL; 1825 1826 if (!dev) 1827 return -ENODEV; 1828 1829 ops = dev->rtnl_link_ops; 1830 if (!ops || !ops->dellink) 1831 return -EOPNOTSUPP; 1832 1833 ops->dellink(dev, &list_kill); 1834 unregister_netdevice_many(&list_kill); 1835 return 0; 1836 } 1837 1838 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 1839 { 1840 unsigned int old_flags; 1841 int err; 1842 1843 old_flags = dev->flags; 1844 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 1845 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1846 if (err < 0) 1847 return err; 1848 } 1849 1850 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 1851 1852 __dev_notify_flags(dev, old_flags, ~0U); 1853 return 0; 1854 } 1855 EXPORT_SYMBOL(rtnl_configure_link); 1856 1857 struct net_device *rtnl_create_link(struct net *net, 1858 char *ifname, unsigned char name_assign_type, 1859 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 1860 { 1861 int err; 1862 struct net_device *dev; 1863 unsigned int num_tx_queues = 1; 1864 unsigned int num_rx_queues = 1; 1865 1866 if (tb[IFLA_NUM_TX_QUEUES]) 1867 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 1868 else if (ops->get_num_tx_queues) 1869 num_tx_queues = ops->get_num_tx_queues(); 1870 1871 if (tb[IFLA_NUM_RX_QUEUES]) 1872 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 1873 else if (ops->get_num_rx_queues) 1874 num_rx_queues = ops->get_num_rx_queues(); 1875 1876 err = -ENOMEM; 1877 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 1878 ops->setup, num_tx_queues, num_rx_queues); 1879 if (!dev) 1880 goto err; 1881 1882 dev_net_set(dev, net); 1883 dev->rtnl_link_ops = ops; 1884 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 1885 1886 if (tb[IFLA_MTU]) 1887 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1888 if (tb[IFLA_ADDRESS]) { 1889 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1890 nla_len(tb[IFLA_ADDRESS])); 1891 dev->addr_assign_type = NET_ADDR_SET; 1892 } 1893 if (tb[IFLA_BROADCAST]) 1894 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1895 nla_len(tb[IFLA_BROADCAST])); 1896 if (tb[IFLA_TXQLEN]) 1897 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1898 if (tb[IFLA_OPERSTATE]) 1899 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1900 if (tb[IFLA_LINKMODE]) 1901 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1902 if (tb[IFLA_GROUP]) 1903 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1904 1905 return dev; 1906 1907 err: 1908 return ERR_PTR(err); 1909 } 1910 EXPORT_SYMBOL(rtnl_create_link); 1911 1912 static int rtnl_group_changelink(const struct sk_buff *skb, 1913 struct net *net, int group, 1914 struct ifinfomsg *ifm, 1915 struct nlattr **tb) 1916 { 1917 struct net_device *dev; 1918 int err; 1919 1920 for_each_netdev(net, dev) { 1921 if (dev->group == group) { 1922 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 1923 if (err < 0) 1924 return err; 1925 } 1926 } 1927 1928 return 0; 1929 } 1930 1931 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 1932 { 1933 struct net *net = sock_net(skb->sk); 1934 const struct rtnl_link_ops *ops; 1935 const struct rtnl_link_ops *m_ops = NULL; 1936 struct net_device *dev; 1937 struct net_device *master_dev = NULL; 1938 struct ifinfomsg *ifm; 1939 char kind[MODULE_NAME_LEN]; 1940 char ifname[IFNAMSIZ]; 1941 struct nlattr *tb[IFLA_MAX+1]; 1942 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 1943 unsigned char name_assign_type = NET_NAME_USER; 1944 int err; 1945 1946 #ifdef CONFIG_MODULES 1947 replay: 1948 #endif 1949 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1950 if (err < 0) 1951 return err; 1952 1953 if (tb[IFLA_IFNAME]) 1954 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1955 else 1956 ifname[0] = '\0'; 1957 1958 ifm = nlmsg_data(nlh); 1959 if (ifm->ifi_index > 0) 1960 dev = __dev_get_by_index(net, ifm->ifi_index); 1961 else { 1962 if (ifname[0]) 1963 dev = __dev_get_by_name(net, ifname); 1964 else 1965 dev = NULL; 1966 } 1967 1968 if (dev) { 1969 master_dev = netdev_master_upper_dev_get(dev); 1970 if (master_dev) 1971 m_ops = master_dev->rtnl_link_ops; 1972 } 1973 1974 err = validate_linkmsg(dev, tb); 1975 if (err < 0) 1976 return err; 1977 1978 if (tb[IFLA_LINKINFO]) { 1979 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 1980 tb[IFLA_LINKINFO], ifla_info_policy); 1981 if (err < 0) 1982 return err; 1983 } else 1984 memset(linkinfo, 0, sizeof(linkinfo)); 1985 1986 if (linkinfo[IFLA_INFO_KIND]) { 1987 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 1988 ops = rtnl_link_ops_get(kind); 1989 } else { 1990 kind[0] = '\0'; 1991 ops = NULL; 1992 } 1993 1994 if (1) { 1995 struct nlattr *attr[ops ? ops->maxtype + 1 : 0]; 1996 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 0]; 1997 struct nlattr **data = NULL; 1998 struct nlattr **slave_data = NULL; 1999 struct net *dest_net; 2000 2001 if (ops) { 2002 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2003 err = nla_parse_nested(attr, ops->maxtype, 2004 linkinfo[IFLA_INFO_DATA], 2005 ops->policy); 2006 if (err < 0) 2007 return err; 2008 data = attr; 2009 } 2010 if (ops->validate) { 2011 err = ops->validate(tb, data); 2012 if (err < 0) 2013 return err; 2014 } 2015 } 2016 2017 if (m_ops) { 2018 if (m_ops->slave_maxtype && 2019 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2020 err = nla_parse_nested(slave_attr, 2021 m_ops->slave_maxtype, 2022 linkinfo[IFLA_INFO_SLAVE_DATA], 2023 m_ops->slave_policy); 2024 if (err < 0) 2025 return err; 2026 slave_data = slave_attr; 2027 } 2028 if (m_ops->slave_validate) { 2029 err = m_ops->slave_validate(tb, slave_data); 2030 if (err < 0) 2031 return err; 2032 } 2033 } 2034 2035 if (dev) { 2036 int status = 0; 2037 2038 if (nlh->nlmsg_flags & NLM_F_EXCL) 2039 return -EEXIST; 2040 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2041 return -EOPNOTSUPP; 2042 2043 if (linkinfo[IFLA_INFO_DATA]) { 2044 if (!ops || ops != dev->rtnl_link_ops || 2045 !ops->changelink) 2046 return -EOPNOTSUPP; 2047 2048 err = ops->changelink(dev, tb, data); 2049 if (err < 0) 2050 return err; 2051 status |= DO_SETLINK_NOTIFY; 2052 } 2053 2054 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2055 if (!m_ops || !m_ops->slave_changelink) 2056 return -EOPNOTSUPP; 2057 2058 err = m_ops->slave_changelink(master_dev, dev, 2059 tb, slave_data); 2060 if (err < 0) 2061 return err; 2062 status |= DO_SETLINK_NOTIFY; 2063 } 2064 2065 return do_setlink(skb, dev, ifm, tb, ifname, status); 2066 } 2067 2068 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2069 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2070 return rtnl_group_changelink(skb, net, 2071 nla_get_u32(tb[IFLA_GROUP]), 2072 ifm, tb); 2073 return -ENODEV; 2074 } 2075 2076 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2077 return -EOPNOTSUPP; 2078 2079 if (!ops) { 2080 #ifdef CONFIG_MODULES 2081 if (kind[0]) { 2082 __rtnl_unlock(); 2083 request_module("rtnl-link-%s", kind); 2084 rtnl_lock(); 2085 ops = rtnl_link_ops_get(kind); 2086 if (ops) 2087 goto replay; 2088 } 2089 #endif 2090 return -EOPNOTSUPP; 2091 } 2092 2093 if (!ops->setup) 2094 return -EOPNOTSUPP; 2095 2096 if (!ifname[0]) { 2097 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2098 name_assign_type = NET_NAME_ENUM; 2099 } 2100 2101 dest_net = rtnl_link_get_net(net, tb); 2102 if (IS_ERR(dest_net)) 2103 return PTR_ERR(dest_net); 2104 2105 dev = rtnl_create_link(dest_net, ifname, name_assign_type, ops, tb); 2106 if (IS_ERR(dev)) { 2107 err = PTR_ERR(dev); 2108 goto out; 2109 } 2110 2111 dev->ifindex = ifm->ifi_index; 2112 2113 if (ops->newlink) { 2114 err = ops->newlink(net, dev, tb, data); 2115 /* Drivers should call free_netdev() in ->destructor 2116 * and unregister it on failure after registration 2117 * so that device could be finally freed in rtnl_unlock. 2118 */ 2119 if (err < 0) { 2120 /* If device is not registered at all, free it now */ 2121 if (dev->reg_state == NETREG_UNINITIALIZED) 2122 free_netdev(dev); 2123 goto out; 2124 } 2125 } else { 2126 err = register_netdevice(dev); 2127 if (err < 0) { 2128 free_netdev(dev); 2129 goto out; 2130 } 2131 } 2132 err = rtnl_configure_link(dev, ifm); 2133 if (err < 0) 2134 unregister_netdevice(dev); 2135 out: 2136 put_net(dest_net); 2137 return err; 2138 } 2139 } 2140 2141 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2142 { 2143 struct net *net = sock_net(skb->sk); 2144 struct ifinfomsg *ifm; 2145 char ifname[IFNAMSIZ]; 2146 struct nlattr *tb[IFLA_MAX+1]; 2147 struct net_device *dev = NULL; 2148 struct sk_buff *nskb; 2149 int err; 2150 u32 ext_filter_mask = 0; 2151 2152 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2153 if (err < 0) 2154 return err; 2155 2156 if (tb[IFLA_IFNAME]) 2157 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2158 2159 if (tb[IFLA_EXT_MASK]) 2160 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2161 2162 ifm = nlmsg_data(nlh); 2163 if (ifm->ifi_index > 0) 2164 dev = __dev_get_by_index(net, ifm->ifi_index); 2165 else if (tb[IFLA_IFNAME]) 2166 dev = __dev_get_by_name(net, ifname); 2167 else 2168 return -EINVAL; 2169 2170 if (dev == NULL) 2171 return -ENODEV; 2172 2173 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2174 if (nskb == NULL) 2175 return -ENOBUFS; 2176 2177 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2178 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2179 if (err < 0) { 2180 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2181 WARN_ON(err == -EMSGSIZE); 2182 kfree_skb(nskb); 2183 } else 2184 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2185 2186 return err; 2187 } 2188 2189 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2190 { 2191 struct net *net = sock_net(skb->sk); 2192 struct net_device *dev; 2193 struct nlattr *tb[IFLA_MAX+1]; 2194 u32 ext_filter_mask = 0; 2195 u16 min_ifinfo_dump_size = 0; 2196 int hdrlen; 2197 2198 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2199 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2200 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2201 2202 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2203 if (tb[IFLA_EXT_MASK]) 2204 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2205 } 2206 2207 if (!ext_filter_mask) 2208 return NLMSG_GOODSIZE; 2209 /* 2210 * traverse the list of net devices and compute the minimum 2211 * buffer size based upon the filter mask. 2212 */ 2213 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2214 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2215 if_nlmsg_size(dev, 2216 ext_filter_mask)); 2217 } 2218 2219 return min_ifinfo_dump_size; 2220 } 2221 2222 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2223 { 2224 int idx; 2225 int s_idx = cb->family; 2226 2227 if (s_idx == 0) 2228 s_idx = 1; 2229 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2230 int type = cb->nlh->nlmsg_type-RTM_BASE; 2231 if (idx < s_idx || idx == PF_PACKET) 2232 continue; 2233 if (rtnl_msg_handlers[idx] == NULL || 2234 rtnl_msg_handlers[idx][type].dumpit == NULL) 2235 continue; 2236 if (idx > s_idx) { 2237 memset(&cb->args[0], 0, sizeof(cb->args)); 2238 cb->prev_seq = 0; 2239 cb->seq = 0; 2240 } 2241 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2242 break; 2243 } 2244 cb->family = idx; 2245 2246 return skb->len; 2247 } 2248 2249 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2250 unsigned int change, gfp_t flags) 2251 { 2252 struct net *net = dev_net(dev); 2253 struct sk_buff *skb; 2254 int err = -ENOBUFS; 2255 size_t if_info_size; 2256 2257 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2258 if (skb == NULL) 2259 goto errout; 2260 2261 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2262 if (err < 0) { 2263 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2264 WARN_ON(err == -EMSGSIZE); 2265 kfree_skb(skb); 2266 goto errout; 2267 } 2268 return skb; 2269 errout: 2270 if (err < 0) 2271 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2272 return NULL; 2273 } 2274 2275 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2276 { 2277 struct net *net = dev_net(dev); 2278 2279 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2280 } 2281 2282 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2283 gfp_t flags) 2284 { 2285 struct sk_buff *skb; 2286 2287 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2288 if (skb) 2289 rtmsg_ifinfo_send(skb, dev, flags); 2290 } 2291 EXPORT_SYMBOL(rtmsg_ifinfo); 2292 2293 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2294 struct net_device *dev, 2295 u8 *addr, u32 pid, u32 seq, 2296 int type, unsigned int flags, 2297 int nlflags) 2298 { 2299 struct nlmsghdr *nlh; 2300 struct ndmsg *ndm; 2301 2302 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2303 if (!nlh) 2304 return -EMSGSIZE; 2305 2306 ndm = nlmsg_data(nlh); 2307 ndm->ndm_family = AF_BRIDGE; 2308 ndm->ndm_pad1 = 0; 2309 ndm->ndm_pad2 = 0; 2310 ndm->ndm_flags = flags; 2311 ndm->ndm_type = 0; 2312 ndm->ndm_ifindex = dev->ifindex; 2313 ndm->ndm_state = NUD_PERMANENT; 2314 2315 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2316 goto nla_put_failure; 2317 2318 return nlmsg_end(skb, nlh); 2319 2320 nla_put_failure: 2321 nlmsg_cancel(skb, nlh); 2322 return -EMSGSIZE; 2323 } 2324 2325 static inline size_t rtnl_fdb_nlmsg_size(void) 2326 { 2327 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2328 } 2329 2330 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type) 2331 { 2332 struct net *net = dev_net(dev); 2333 struct sk_buff *skb; 2334 int err = -ENOBUFS; 2335 2336 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2337 if (!skb) 2338 goto errout; 2339 2340 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF, 0); 2341 if (err < 0) { 2342 kfree_skb(skb); 2343 goto errout; 2344 } 2345 2346 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2347 return; 2348 errout: 2349 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2350 } 2351 2352 /** 2353 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2354 */ 2355 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2356 struct nlattr *tb[], 2357 struct net_device *dev, 2358 const unsigned char *addr, u16 vid, 2359 u16 flags) 2360 { 2361 int err = -EINVAL; 2362 2363 /* If aging addresses are supported device will need to 2364 * implement its own handler for this. 2365 */ 2366 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2367 pr_info("%s: FDB only supports static addresses\n", dev->name); 2368 return err; 2369 } 2370 2371 if (vid) { 2372 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2373 return err; 2374 } 2375 2376 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2377 err = dev_uc_add_excl(dev, addr); 2378 else if (is_multicast_ether_addr(addr)) 2379 err = dev_mc_add_excl(dev, addr); 2380 2381 /* Only return duplicate errors if NLM_F_EXCL is set */ 2382 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2383 err = 0; 2384 2385 return err; 2386 } 2387 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2388 2389 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2390 { 2391 u16 vid = 0; 2392 2393 if (vlan_attr) { 2394 if (nla_len(vlan_attr) != sizeof(u16)) { 2395 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2396 return -EINVAL; 2397 } 2398 2399 vid = nla_get_u16(vlan_attr); 2400 2401 if (!vid || vid >= VLAN_VID_MASK) { 2402 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2403 vid); 2404 return -EINVAL; 2405 } 2406 } 2407 *p_vid = vid; 2408 return 0; 2409 } 2410 2411 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2412 { 2413 struct net *net = sock_net(skb->sk); 2414 struct ndmsg *ndm; 2415 struct nlattr *tb[NDA_MAX+1]; 2416 struct net_device *dev; 2417 u8 *addr; 2418 u16 vid; 2419 int err; 2420 2421 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2422 if (err < 0) 2423 return err; 2424 2425 ndm = nlmsg_data(nlh); 2426 if (ndm->ndm_ifindex == 0) { 2427 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2428 return -EINVAL; 2429 } 2430 2431 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2432 if (dev == NULL) { 2433 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2434 return -ENODEV; 2435 } 2436 2437 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2438 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2439 return -EINVAL; 2440 } 2441 2442 addr = nla_data(tb[NDA_LLADDR]); 2443 2444 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2445 if (err) 2446 return err; 2447 2448 err = -EOPNOTSUPP; 2449 2450 /* Support fdb on master device the net/bridge default case */ 2451 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2452 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2453 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2454 const struct net_device_ops *ops = br_dev->netdev_ops; 2455 2456 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2457 nlh->nlmsg_flags); 2458 if (err) 2459 goto out; 2460 else 2461 ndm->ndm_flags &= ~NTF_MASTER; 2462 } 2463 2464 /* Embedded bridge, macvlan, and any other device support */ 2465 if ((ndm->ndm_flags & NTF_SELF)) { 2466 if (dev->netdev_ops->ndo_fdb_add) 2467 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 2468 vid, 2469 nlh->nlmsg_flags); 2470 else 2471 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 2472 nlh->nlmsg_flags); 2473 2474 if (!err) { 2475 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH); 2476 ndm->ndm_flags &= ~NTF_SELF; 2477 } 2478 } 2479 out: 2480 return err; 2481 } 2482 2483 /** 2484 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 2485 */ 2486 int ndo_dflt_fdb_del(struct ndmsg *ndm, 2487 struct nlattr *tb[], 2488 struct net_device *dev, 2489 const unsigned char *addr, u16 vid) 2490 { 2491 int err = -EINVAL; 2492 2493 /* If aging addresses are supported device will need to 2494 * implement its own handler for this. 2495 */ 2496 if (!(ndm->ndm_state & NUD_PERMANENT)) { 2497 pr_info("%s: FDB only supports static addresses\n", dev->name); 2498 return err; 2499 } 2500 2501 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2502 err = dev_uc_del(dev, addr); 2503 else if (is_multicast_ether_addr(addr)) 2504 err = dev_mc_del(dev, addr); 2505 2506 return err; 2507 } 2508 EXPORT_SYMBOL(ndo_dflt_fdb_del); 2509 2510 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 2511 { 2512 struct net *net = sock_net(skb->sk); 2513 struct ndmsg *ndm; 2514 struct nlattr *tb[NDA_MAX+1]; 2515 struct net_device *dev; 2516 int err = -EINVAL; 2517 __u8 *addr; 2518 u16 vid; 2519 2520 if (!netlink_capable(skb, CAP_NET_ADMIN)) 2521 return -EPERM; 2522 2523 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2524 if (err < 0) 2525 return err; 2526 2527 ndm = nlmsg_data(nlh); 2528 if (ndm->ndm_ifindex == 0) { 2529 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2530 return -EINVAL; 2531 } 2532 2533 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2534 if (dev == NULL) { 2535 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2536 return -ENODEV; 2537 } 2538 2539 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2540 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 2541 return -EINVAL; 2542 } 2543 2544 addr = nla_data(tb[NDA_LLADDR]); 2545 2546 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2547 if (err) 2548 return err; 2549 2550 err = -EOPNOTSUPP; 2551 2552 /* Support fdb on master device the net/bridge default case */ 2553 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2554 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2555 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2556 const struct net_device_ops *ops = br_dev->netdev_ops; 2557 2558 if (ops->ndo_fdb_del) 2559 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 2560 2561 if (err) 2562 goto out; 2563 else 2564 ndm->ndm_flags &= ~NTF_MASTER; 2565 } 2566 2567 /* Embedded bridge, macvlan, and any other device support */ 2568 if (ndm->ndm_flags & NTF_SELF) { 2569 if (dev->netdev_ops->ndo_fdb_del) 2570 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 2571 vid); 2572 else 2573 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 2574 2575 if (!err) { 2576 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH); 2577 ndm->ndm_flags &= ~NTF_SELF; 2578 } 2579 } 2580 out: 2581 return err; 2582 } 2583 2584 static int nlmsg_populate_fdb(struct sk_buff *skb, 2585 struct netlink_callback *cb, 2586 struct net_device *dev, 2587 int *idx, 2588 struct netdev_hw_addr_list *list) 2589 { 2590 struct netdev_hw_addr *ha; 2591 int err; 2592 u32 portid, seq; 2593 2594 portid = NETLINK_CB(cb->skb).portid; 2595 seq = cb->nlh->nlmsg_seq; 2596 2597 list_for_each_entry(ha, &list->list, list) { 2598 if (*idx < cb->args[0]) 2599 goto skip; 2600 2601 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 2602 portid, seq, 2603 RTM_NEWNEIGH, NTF_SELF, 2604 NLM_F_MULTI); 2605 if (err < 0) 2606 return err; 2607 skip: 2608 *idx += 1; 2609 } 2610 return 0; 2611 } 2612 2613 /** 2614 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2615 * @nlh: netlink message header 2616 * @dev: netdevice 2617 * 2618 * Default netdevice operation to dump the existing unicast address list. 2619 * Returns number of addresses from list put in skb. 2620 */ 2621 int ndo_dflt_fdb_dump(struct sk_buff *skb, 2622 struct netlink_callback *cb, 2623 struct net_device *dev, 2624 struct net_device *filter_dev, 2625 int idx) 2626 { 2627 int err; 2628 2629 netif_addr_lock_bh(dev); 2630 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 2631 if (err) 2632 goto out; 2633 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 2634 out: 2635 netif_addr_unlock_bh(dev); 2636 return idx; 2637 } 2638 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 2639 2640 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 2641 { 2642 struct net_device *dev; 2643 struct nlattr *tb[IFLA_MAX+1]; 2644 struct net_device *bdev = NULL; 2645 struct net_device *br_dev = NULL; 2646 const struct net_device_ops *ops = NULL; 2647 const struct net_device_ops *cops = NULL; 2648 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 2649 struct net *net = sock_net(skb->sk); 2650 int brport_idx = 0; 2651 int br_idx = 0; 2652 int idx = 0; 2653 2654 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 2655 ifla_policy) == 0) { 2656 if (tb[IFLA_MASTER]) 2657 br_idx = nla_get_u32(tb[IFLA_MASTER]); 2658 } 2659 2660 brport_idx = ifm->ifi_index; 2661 2662 if (br_idx) { 2663 br_dev = __dev_get_by_index(net, br_idx); 2664 if (!br_dev) 2665 return -ENODEV; 2666 2667 ops = br_dev->netdev_ops; 2668 bdev = br_dev; 2669 } 2670 2671 for_each_netdev(net, dev) { 2672 if (brport_idx && (dev->ifindex != brport_idx)) 2673 continue; 2674 2675 if (!br_idx) { /* user did not specify a specific bridge */ 2676 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2677 br_dev = netdev_master_upper_dev_get(dev); 2678 cops = br_dev->netdev_ops; 2679 } 2680 2681 bdev = dev; 2682 } else { 2683 if (dev != br_dev && 2684 !(dev->priv_flags & IFF_BRIDGE_PORT)) 2685 continue; 2686 2687 if (br_dev != netdev_master_upper_dev_get(dev) && 2688 !(dev->priv_flags & IFF_EBRIDGE)) 2689 continue; 2690 2691 bdev = br_dev; 2692 cops = ops; 2693 } 2694 2695 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2696 if (cops && cops->ndo_fdb_dump) 2697 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev, 2698 idx); 2699 } 2700 2701 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); 2702 if (dev->netdev_ops->ndo_fdb_dump) 2703 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, bdev, dev, 2704 idx); 2705 2706 cops = NULL; 2707 } 2708 2709 cb->args[0] = idx; 2710 return skb->len; 2711 } 2712 2713 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 2714 unsigned int attrnum, unsigned int flag) 2715 { 2716 if (mask & flag) 2717 return nla_put_u8(skb, attrnum, !!(flags & flag)); 2718 return 0; 2719 } 2720 2721 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 2722 struct net_device *dev, u16 mode, 2723 u32 flags, u32 mask) 2724 { 2725 struct nlmsghdr *nlh; 2726 struct ifinfomsg *ifm; 2727 struct nlattr *br_afspec; 2728 struct nlattr *protinfo; 2729 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 2730 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2731 2732 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI); 2733 if (nlh == NULL) 2734 return -EMSGSIZE; 2735 2736 ifm = nlmsg_data(nlh); 2737 ifm->ifi_family = AF_BRIDGE; 2738 ifm->__ifi_pad = 0; 2739 ifm->ifi_type = dev->type; 2740 ifm->ifi_index = dev->ifindex; 2741 ifm->ifi_flags = dev_get_flags(dev); 2742 ifm->ifi_change = 0; 2743 2744 2745 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 2746 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 2747 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 2748 (br_dev && 2749 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 2750 (dev->addr_len && 2751 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 2752 (dev->ifindex != dev->iflink && 2753 nla_put_u32(skb, IFLA_LINK, dev->iflink))) 2754 goto nla_put_failure; 2755 2756 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 2757 if (!br_afspec) 2758 goto nla_put_failure; 2759 2760 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 2761 nla_nest_cancel(skb, br_afspec); 2762 goto nla_put_failure; 2763 } 2764 2765 if (mode != BRIDGE_MODE_UNDEF) { 2766 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 2767 nla_nest_cancel(skb, br_afspec); 2768 goto nla_put_failure; 2769 } 2770 } 2771 nla_nest_end(skb, br_afspec); 2772 2773 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 2774 if (!protinfo) 2775 goto nla_put_failure; 2776 2777 if (brport_nla_put_flag(skb, flags, mask, 2778 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 2779 brport_nla_put_flag(skb, flags, mask, 2780 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 2781 brport_nla_put_flag(skb, flags, mask, 2782 IFLA_BRPORT_FAST_LEAVE, 2783 BR_MULTICAST_FAST_LEAVE) || 2784 brport_nla_put_flag(skb, flags, mask, 2785 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 2786 brport_nla_put_flag(skb, flags, mask, 2787 IFLA_BRPORT_LEARNING, BR_LEARNING) || 2788 brport_nla_put_flag(skb, flags, mask, 2789 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 2790 brport_nla_put_flag(skb, flags, mask, 2791 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 2792 brport_nla_put_flag(skb, flags, mask, 2793 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 2794 nla_nest_cancel(skb, protinfo); 2795 goto nla_put_failure; 2796 } 2797 2798 nla_nest_end(skb, protinfo); 2799 2800 return nlmsg_end(skb, nlh); 2801 nla_put_failure: 2802 nlmsg_cancel(skb, nlh); 2803 return -EMSGSIZE; 2804 } 2805 EXPORT_SYMBOL(ndo_dflt_bridge_getlink); 2806 2807 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 2808 { 2809 struct net *net = sock_net(skb->sk); 2810 struct net_device *dev; 2811 int idx = 0; 2812 u32 portid = NETLINK_CB(cb->skb).portid; 2813 u32 seq = cb->nlh->nlmsg_seq; 2814 u32 filter_mask = 0; 2815 2816 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 2817 struct nlattr *extfilt; 2818 2819 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 2820 IFLA_EXT_MASK); 2821 if (extfilt) { 2822 if (nla_len(extfilt) < sizeof(filter_mask)) 2823 return -EINVAL; 2824 2825 filter_mask = nla_get_u32(extfilt); 2826 } 2827 } 2828 2829 rcu_read_lock(); 2830 for_each_netdev_rcu(net, dev) { 2831 const struct net_device_ops *ops = dev->netdev_ops; 2832 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2833 2834 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 2835 if (idx >= cb->args[0] && 2836 br_dev->netdev_ops->ndo_bridge_getlink( 2837 skb, portid, seq, dev, filter_mask) < 0) 2838 break; 2839 idx++; 2840 } 2841 2842 if (ops->ndo_bridge_getlink) { 2843 if (idx >= cb->args[0] && 2844 ops->ndo_bridge_getlink(skb, portid, seq, dev, 2845 filter_mask) < 0) 2846 break; 2847 idx++; 2848 } 2849 } 2850 rcu_read_unlock(); 2851 cb->args[0] = idx; 2852 2853 return skb->len; 2854 } 2855 2856 static inline size_t bridge_nlmsg_size(void) 2857 { 2858 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 2859 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 2860 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 2861 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 2862 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 2863 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 2864 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 2865 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 2866 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 2867 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 2868 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 2869 } 2870 2871 static int rtnl_bridge_notify(struct net_device *dev, u16 flags) 2872 { 2873 struct net *net = dev_net(dev); 2874 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2875 struct sk_buff *skb; 2876 int err = -EOPNOTSUPP; 2877 2878 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 2879 if (!skb) { 2880 err = -ENOMEM; 2881 goto errout; 2882 } 2883 2884 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) && 2885 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 2886 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0); 2887 if (err < 0) 2888 goto errout; 2889 } 2890 2891 if ((flags & BRIDGE_FLAGS_SELF) && 2892 dev->netdev_ops->ndo_bridge_getlink) { 2893 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0); 2894 if (err < 0) 2895 goto errout; 2896 } 2897 2898 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 2899 return 0; 2900 errout: 2901 WARN_ON(err == -EMSGSIZE); 2902 kfree_skb(skb); 2903 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2904 return err; 2905 } 2906 2907 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2908 { 2909 struct net *net = sock_net(skb->sk); 2910 struct ifinfomsg *ifm; 2911 struct net_device *dev; 2912 struct nlattr *br_spec, *attr = NULL; 2913 int rem, err = -EOPNOTSUPP; 2914 u16 oflags, flags = 0; 2915 bool have_flags = false; 2916 2917 if (nlmsg_len(nlh) < sizeof(*ifm)) 2918 return -EINVAL; 2919 2920 ifm = nlmsg_data(nlh); 2921 if (ifm->ifi_family != AF_BRIDGE) 2922 return -EPFNOSUPPORT; 2923 2924 dev = __dev_get_by_index(net, ifm->ifi_index); 2925 if (!dev) { 2926 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 2927 return -ENODEV; 2928 } 2929 2930 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 2931 if (br_spec) { 2932 nla_for_each_nested(attr, br_spec, rem) { 2933 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 2934 if (nla_len(attr) < sizeof(flags)) 2935 return -EINVAL; 2936 2937 have_flags = true; 2938 flags = nla_get_u16(attr); 2939 break; 2940 } 2941 } 2942 } 2943 2944 oflags = flags; 2945 2946 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 2947 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2948 2949 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 2950 err = -EOPNOTSUPP; 2951 goto out; 2952 } 2953 2954 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh); 2955 if (err) 2956 goto out; 2957 2958 flags &= ~BRIDGE_FLAGS_MASTER; 2959 } 2960 2961 if ((flags & BRIDGE_FLAGS_SELF)) { 2962 if (!dev->netdev_ops->ndo_bridge_setlink) 2963 err = -EOPNOTSUPP; 2964 else 2965 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh); 2966 2967 if (!err) 2968 flags &= ~BRIDGE_FLAGS_SELF; 2969 } 2970 2971 if (have_flags) 2972 memcpy(nla_data(attr), &flags, sizeof(flags)); 2973 /* Generate event to notify upper layer of bridge change */ 2974 if (!err) 2975 err = rtnl_bridge_notify(dev, oflags); 2976 out: 2977 return err; 2978 } 2979 2980 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2981 { 2982 struct net *net = sock_net(skb->sk); 2983 struct ifinfomsg *ifm; 2984 struct net_device *dev; 2985 struct nlattr *br_spec, *attr = NULL; 2986 int rem, err = -EOPNOTSUPP; 2987 u16 oflags, flags = 0; 2988 bool have_flags = false; 2989 2990 if (nlmsg_len(nlh) < sizeof(*ifm)) 2991 return -EINVAL; 2992 2993 ifm = nlmsg_data(nlh); 2994 if (ifm->ifi_family != AF_BRIDGE) 2995 return -EPFNOSUPPORT; 2996 2997 dev = __dev_get_by_index(net, ifm->ifi_index); 2998 if (!dev) { 2999 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3000 return -ENODEV; 3001 } 3002 3003 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3004 if (br_spec) { 3005 nla_for_each_nested(attr, br_spec, rem) { 3006 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3007 if (nla_len(attr) < sizeof(flags)) 3008 return -EINVAL; 3009 3010 have_flags = true; 3011 flags = nla_get_u16(attr); 3012 break; 3013 } 3014 } 3015 } 3016 3017 oflags = flags; 3018 3019 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3020 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3021 3022 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3023 err = -EOPNOTSUPP; 3024 goto out; 3025 } 3026 3027 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh); 3028 if (err) 3029 goto out; 3030 3031 flags &= ~BRIDGE_FLAGS_MASTER; 3032 } 3033 3034 if ((flags & BRIDGE_FLAGS_SELF)) { 3035 if (!dev->netdev_ops->ndo_bridge_dellink) 3036 err = -EOPNOTSUPP; 3037 else 3038 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh); 3039 3040 if (!err) 3041 flags &= ~BRIDGE_FLAGS_SELF; 3042 } 3043 3044 if (have_flags) 3045 memcpy(nla_data(attr), &flags, sizeof(flags)); 3046 /* Generate event to notify upper layer of bridge change */ 3047 if (!err) 3048 err = rtnl_bridge_notify(dev, oflags); 3049 out: 3050 return err; 3051 } 3052 3053 /* Process one rtnetlink message. */ 3054 3055 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3056 { 3057 struct net *net = sock_net(skb->sk); 3058 rtnl_doit_func doit; 3059 int sz_idx, kind; 3060 int family; 3061 int type; 3062 int err; 3063 3064 type = nlh->nlmsg_type; 3065 if (type > RTM_MAX) 3066 return -EOPNOTSUPP; 3067 3068 type -= RTM_BASE; 3069 3070 /* All the messages must have at least 1 byte length */ 3071 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3072 return 0; 3073 3074 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3075 sz_idx = type>>2; 3076 kind = type&3; 3077 3078 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 3079 return -EPERM; 3080 3081 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 3082 struct sock *rtnl; 3083 rtnl_dumpit_func dumpit; 3084 rtnl_calcit_func calcit; 3085 u16 min_dump_alloc = 0; 3086 3087 dumpit = rtnl_get_dumpit(family, type); 3088 if (dumpit == NULL) 3089 return -EOPNOTSUPP; 3090 calcit = rtnl_get_calcit(family, type); 3091 if (calcit) 3092 min_dump_alloc = calcit(skb, nlh); 3093 3094 __rtnl_unlock(); 3095 rtnl = net->rtnl; 3096 { 3097 struct netlink_dump_control c = { 3098 .dump = dumpit, 3099 .min_dump_alloc = min_dump_alloc, 3100 }; 3101 err = netlink_dump_start(rtnl, skb, nlh, &c); 3102 } 3103 rtnl_lock(); 3104 return err; 3105 } 3106 3107 doit = rtnl_get_doit(family, type); 3108 if (doit == NULL) 3109 return -EOPNOTSUPP; 3110 3111 return doit(skb, nlh); 3112 } 3113 3114 static void rtnetlink_rcv(struct sk_buff *skb) 3115 { 3116 rtnl_lock(); 3117 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 3118 rtnl_unlock(); 3119 } 3120 3121 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 3122 { 3123 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3124 3125 switch (event) { 3126 case NETDEV_UP: 3127 case NETDEV_DOWN: 3128 case NETDEV_PRE_UP: 3129 case NETDEV_POST_INIT: 3130 case NETDEV_REGISTER: 3131 case NETDEV_CHANGE: 3132 case NETDEV_PRE_TYPE_CHANGE: 3133 case NETDEV_GOING_DOWN: 3134 case NETDEV_UNREGISTER: 3135 case NETDEV_UNREGISTER_FINAL: 3136 case NETDEV_RELEASE: 3137 case NETDEV_JOIN: 3138 break; 3139 default: 3140 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 3141 break; 3142 } 3143 return NOTIFY_DONE; 3144 } 3145 3146 static struct notifier_block rtnetlink_dev_notifier = { 3147 .notifier_call = rtnetlink_event, 3148 }; 3149 3150 3151 static int __net_init rtnetlink_net_init(struct net *net) 3152 { 3153 struct sock *sk; 3154 struct netlink_kernel_cfg cfg = { 3155 .groups = RTNLGRP_MAX, 3156 .input = rtnetlink_rcv, 3157 .cb_mutex = &rtnl_mutex, 3158 .flags = NL_CFG_F_NONROOT_RECV, 3159 }; 3160 3161 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 3162 if (!sk) 3163 return -ENOMEM; 3164 net->rtnl = sk; 3165 return 0; 3166 } 3167 3168 static void __net_exit rtnetlink_net_exit(struct net *net) 3169 { 3170 netlink_kernel_release(net->rtnl); 3171 net->rtnl = NULL; 3172 } 3173 3174 static struct pernet_operations rtnetlink_net_ops = { 3175 .init = rtnetlink_net_init, 3176 .exit = rtnetlink_net_exit, 3177 }; 3178 3179 void __init rtnetlink_init(void) 3180 { 3181 if (register_pernet_subsys(&rtnetlink_net_ops)) 3182 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 3183 3184 register_netdevice_notifier(&rtnetlink_dev_notifier); 3185 3186 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 3187 rtnl_dump_ifinfo, rtnl_calcit); 3188 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 3189 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 3190 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 3191 3192 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 3193 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 3194 3195 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 3196 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 3197 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 3198 3199 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 3200 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 3201 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 3202 } 3203 3204