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 60struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 rtnl_calcit_func calcit; 64}; 65 66static DEFINE_MUTEX(rtnl_mutex); 67 68void rtnl_lock(void) 69{ 70 mutex_lock(&rtnl_mutex); 71} 72EXPORT_SYMBOL(rtnl_lock); 73 74void __rtnl_unlock(void) 75{ 76 mutex_unlock(&rtnl_mutex); 77} 78 79void rtnl_unlock(void) 80{ 81 /* This fellow will unlock it for us. */ 82 netdev_run_todo(); 83} 84EXPORT_SYMBOL(rtnl_unlock); 85 86int rtnl_trylock(void) 87{ 88 return mutex_trylock(&rtnl_mutex); 89} 90EXPORT_SYMBOL(rtnl_trylock); 91 92int rtnl_is_locked(void) 93{ 94 return mutex_is_locked(&rtnl_mutex); 95} 96EXPORT_SYMBOL(rtnl_is_locked); 97 98#ifdef CONFIG_PROVE_LOCKING 99int lockdep_rtnl_is_held(void) 100{ 101 return lockdep_is_held(&rtnl_mutex); 102} 103EXPORT_SYMBOL(lockdep_rtnl_is_held); 104#endif /* #ifdef CONFIG_PROVE_LOCKING */ 105 106static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 107 108static 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 122static 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 137static 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 152static 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 */ 185int __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} 215EXPORT_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 */ 226void 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} 235EXPORT_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 */ 244int 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} 259EXPORT_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 */ 268void 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} 275EXPORT_SYMBOL_GPL(rtnl_unregister_all); 276 277static LIST_HEAD(link_ops); 278 279static 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 */ 300int __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} 316EXPORT_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 */ 324int 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} 333EXPORT_SYMBOL_GPL(rtnl_link_register); 334 335static 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 */ 353void __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} 362EXPORT_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 */ 367static 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 */ 396void 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} 405EXPORT_SYMBOL_GPL(rtnl_link_unregister); 406 407static 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 423static 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 448static LIST_HEAD(rtnl_af_ops); 449 450static 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 */ 468void 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} 474EXPORT_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 */ 482void __rtnl_af_unregister(struct rtnl_af_ops *ops) 483{ 484 list_del(&ops->list); 485} 486EXPORT_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 */ 492void rtnl_af_unregister(struct rtnl_af_ops *ops) 493{ 494 rtnl_lock(); 495 __rtnl_af_unregister(ops); 496 rtnl_unlock(); 497} 498EXPORT_SYMBOL_GPL(rtnl_af_unregister); 499 500static 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 519static 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 529static 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 556err_cancel_slave_data: 557 nla_nest_cancel(skb, slave_data); 558 return err; 559} 560 561static 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 588err_cancel_data: 589 nla_nest_cancel(skb, data); 590 return err; 591} 592 593static 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 613err_cancel_link: 614 nla_nest_cancel(skb, linkinfo); 615out: 616 return err; 617} 618 619int 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 633int 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} 639EXPORT_SYMBOL(rtnl_unicast); 640 641void 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} 652EXPORT_SYMBOL(rtnl_notify); 653 654void 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} 660EXPORT_SYMBOL(rtnl_set_sk_err); 661 662int 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 696nla_put_failure: 697 nla_nest_cancel(skb, mx); 698 return -EMSGSIZE; 699} 700EXPORT_SYMBOL(rtnetlink_put_metrics); 701 702int 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} 722EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 723 724static 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 751static 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 757static 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 770static 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 802static 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 */ 808static 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 nla_total_size(sizeof(struct ifla_vf_rss_query_en))); 823 return size; 824 } else 825 return 0; 826} 827 828static size_t rtnl_port_size(const struct net_device *dev, 829 u32 ext_filter_mask) 830{ 831 size_t port_size = nla_total_size(4) /* PORT_VF */ 832 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 833 + nla_total_size(sizeof(struct ifla_port_vsi)) 834 /* PORT_VSI_TYPE */ 835 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 836 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 837 + nla_total_size(1) /* PROT_VDP_REQUEST */ 838 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 839 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 840 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 841 + port_size; 842 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 843 + port_size; 844 845 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 846 !(ext_filter_mask & RTEXT_FILTER_VF)) 847 return 0; 848 if (dev_num_vf(dev->dev.parent)) 849 return port_self_size + vf_ports_size + 850 vf_port_size * dev_num_vf(dev->dev.parent); 851 else 852 return port_self_size; 853} 854 855static noinline size_t if_nlmsg_size(const struct net_device *dev, 856 u32 ext_filter_mask) 857{ 858 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 859 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 860 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 861 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 862 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 863 + nla_total_size(sizeof(struct rtnl_link_stats)) 864 + nla_total_size(sizeof(struct rtnl_link_stats64)) 865 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 866 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 867 + nla_total_size(4) /* IFLA_TXQLEN */ 868 + nla_total_size(4) /* IFLA_WEIGHT */ 869 + nla_total_size(4) /* IFLA_MTU */ 870 + nla_total_size(4) /* IFLA_LINK */ 871 + nla_total_size(4) /* IFLA_MASTER */ 872 + nla_total_size(1) /* IFLA_CARRIER */ 873 + nla_total_size(4) /* IFLA_PROMISCUITY */ 874 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 875 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 876 + nla_total_size(1) /* IFLA_OPERSTATE */ 877 + nla_total_size(1) /* IFLA_LINKMODE */ 878 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 879 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 880 + nla_total_size(ext_filter_mask 881 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 882 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 883 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 884 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 885 + rtnl_link_get_af_size(dev) /* IFLA_AF_SPEC */ 886 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 887 + nla_total_size(MAX_PHYS_ITEM_ID_LEN); /* IFLA_PHYS_SWITCH_ID */ 888} 889 890static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 891{ 892 struct nlattr *vf_ports; 893 struct nlattr *vf_port; 894 int vf; 895 int err; 896 897 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 898 if (!vf_ports) 899 return -EMSGSIZE; 900 901 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 902 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 903 if (!vf_port) 904 goto nla_put_failure; 905 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 906 goto nla_put_failure; 907 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 908 if (err == -EMSGSIZE) 909 goto nla_put_failure; 910 if (err) { 911 nla_nest_cancel(skb, vf_port); 912 continue; 913 } 914 nla_nest_end(skb, vf_port); 915 } 916 917 nla_nest_end(skb, vf_ports); 918 919 return 0; 920 921nla_put_failure: 922 nla_nest_cancel(skb, vf_ports); 923 return -EMSGSIZE; 924} 925 926static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 927{ 928 struct nlattr *port_self; 929 int err; 930 931 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 932 if (!port_self) 933 return -EMSGSIZE; 934 935 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 936 if (err) { 937 nla_nest_cancel(skb, port_self); 938 return (err == -EMSGSIZE) ? err : 0; 939 } 940 941 nla_nest_end(skb, port_self); 942 943 return 0; 944} 945 946static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 947 u32 ext_filter_mask) 948{ 949 int err; 950 951 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 952 !(ext_filter_mask & RTEXT_FILTER_VF)) 953 return 0; 954 955 err = rtnl_port_self_fill(skb, dev); 956 if (err) 957 return err; 958 959 if (dev_num_vf(dev->dev.parent)) { 960 err = rtnl_vf_ports_fill(skb, dev); 961 if (err) 962 return err; 963 } 964 965 return 0; 966} 967 968static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 969{ 970 int err; 971 struct netdev_phys_item_id ppid; 972 973 err = dev_get_phys_port_id(dev, &ppid); 974 if (err) { 975 if (err == -EOPNOTSUPP) 976 return 0; 977 return err; 978 } 979 980 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 981 return -EMSGSIZE; 982 983 return 0; 984} 985 986static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 987{ 988 char name[IFNAMSIZ]; 989 int err; 990 991 err = dev_get_phys_port_name(dev, name, sizeof(name)); 992 if (err) { 993 if (err == -EOPNOTSUPP) 994 return 0; 995 return err; 996 } 997 998 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 999 return -EMSGSIZE; 1000 1001 return 0; 1002} 1003 1004static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1005{ 1006 int err; 1007 struct netdev_phys_item_id psid; 1008 1009 err = netdev_switch_parent_id_get(dev, &psid); 1010 if (err) { 1011 if (err == -EOPNOTSUPP) 1012 return 0; 1013 return err; 1014 } 1015 1016 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, psid.id_len, psid.id)) 1017 return -EMSGSIZE; 1018 1019 return 0; 1020} 1021 1022static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1023 int type, u32 pid, u32 seq, u32 change, 1024 unsigned int flags, u32 ext_filter_mask) 1025{ 1026 struct ifinfomsg *ifm; 1027 struct nlmsghdr *nlh; 1028 struct rtnl_link_stats64 temp; 1029 const struct rtnl_link_stats64 *stats; 1030 struct nlattr *attr, *af_spec; 1031 struct rtnl_af_ops *af_ops; 1032 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1033 1034 ASSERT_RTNL(); 1035 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1036 if (nlh == NULL) 1037 return -EMSGSIZE; 1038 1039 ifm = nlmsg_data(nlh); 1040 ifm->ifi_family = AF_UNSPEC; 1041 ifm->__ifi_pad = 0; 1042 ifm->ifi_type = dev->type; 1043 ifm->ifi_index = dev->ifindex; 1044 ifm->ifi_flags = dev_get_flags(dev); 1045 ifm->ifi_change = change; 1046 1047 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1048 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1049 nla_put_u8(skb, IFLA_OPERSTATE, 1050 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1051 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1052 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1053 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1054 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1055 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1056#ifdef CONFIG_RPS 1057 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1058#endif 1059 (dev->ifindex != dev_get_iflink(dev) && 1060 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1061 (upper_dev && 1062 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1063 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1064 (dev->qdisc && 1065 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1066 (dev->ifalias && 1067 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1068 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1069 atomic_read(&dev->carrier_changes))) 1070 goto nla_put_failure; 1071 1072 if (1) { 1073 struct rtnl_link_ifmap map = { 1074 .mem_start = dev->mem_start, 1075 .mem_end = dev->mem_end, 1076 .base_addr = dev->base_addr, 1077 .irq = dev->irq, 1078 .dma = dev->dma, 1079 .port = dev->if_port, 1080 }; 1081 if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) 1082 goto nla_put_failure; 1083 } 1084 1085 if (dev->addr_len) { 1086 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1087 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1088 goto nla_put_failure; 1089 } 1090 1091 if (rtnl_phys_port_id_fill(skb, dev)) 1092 goto nla_put_failure; 1093 1094 if (rtnl_phys_port_name_fill(skb, dev)) 1095 goto nla_put_failure; 1096 1097 if (rtnl_phys_switch_id_fill(skb, dev)) 1098 goto nla_put_failure; 1099 1100 attr = nla_reserve(skb, IFLA_STATS, 1101 sizeof(struct rtnl_link_stats)); 1102 if (attr == NULL) 1103 goto nla_put_failure; 1104 1105 stats = dev_get_stats(dev, &temp); 1106 copy_rtnl_link_stats(nla_data(attr), stats); 1107 1108 attr = nla_reserve(skb, IFLA_STATS64, 1109 sizeof(struct rtnl_link_stats64)); 1110 if (attr == NULL) 1111 goto nla_put_failure; 1112 copy_rtnl_link_stats64(nla_data(attr), stats); 1113 1114 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1115 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1116 goto nla_put_failure; 1117 1118 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent 1119 && (ext_filter_mask & RTEXT_FILTER_VF)) { 1120 int i; 1121 1122 struct nlattr *vfinfo, *vf; 1123 int num_vfs = dev_num_vf(dev->dev.parent); 1124 1125 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1126 if (!vfinfo) 1127 goto nla_put_failure; 1128 for (i = 0; i < num_vfs; i++) { 1129 struct ifla_vf_info ivi; 1130 struct ifla_vf_mac vf_mac; 1131 struct ifla_vf_vlan vf_vlan; 1132 struct ifla_vf_rate vf_rate; 1133 struct ifla_vf_tx_rate vf_tx_rate; 1134 struct ifla_vf_spoofchk vf_spoofchk; 1135 struct ifla_vf_link_state vf_linkstate; 1136 struct ifla_vf_rss_query_en vf_rss_query_en; 1137 1138 /* 1139 * Not all SR-IOV capable drivers support the 1140 * spoofcheck and "RSS query enable" query. Preset to 1141 * -1 so the user space tool can detect that the driver 1142 * didn't report anything. 1143 */ 1144 ivi.spoofchk = -1; 1145 ivi.rss_query_en = -1; 1146 memset(ivi.mac, 0, sizeof(ivi.mac)); 1147 /* The default value for VF link state is "auto" 1148 * IFLA_VF_LINK_STATE_AUTO which equals zero 1149 */ 1150 ivi.linkstate = 0; 1151 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) 1152 break; 1153 vf_mac.vf = 1154 vf_vlan.vf = 1155 vf_rate.vf = 1156 vf_tx_rate.vf = 1157 vf_spoofchk.vf = 1158 vf_linkstate.vf = 1159 vf_rss_query_en.vf = ivi.vf; 1160 1161 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1162 vf_vlan.vlan = ivi.vlan; 1163 vf_vlan.qos = ivi.qos; 1164 vf_tx_rate.rate = ivi.max_tx_rate; 1165 vf_rate.min_tx_rate = ivi.min_tx_rate; 1166 vf_rate.max_tx_rate = ivi.max_tx_rate; 1167 vf_spoofchk.setting = ivi.spoofchk; 1168 vf_linkstate.link_state = ivi.linkstate; 1169 vf_rss_query_en.setting = ivi.rss_query_en; 1170 vf = nla_nest_start(skb, IFLA_VF_INFO); 1171 if (!vf) { 1172 nla_nest_cancel(skb, vfinfo); 1173 goto nla_put_failure; 1174 } 1175 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1176 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1177 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1178 &vf_rate) || 1179 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1180 &vf_tx_rate) || 1181 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1182 &vf_spoofchk) || 1183 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1184 &vf_linkstate) || 1185 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1186 sizeof(vf_rss_query_en), 1187 &vf_rss_query_en)) 1188 goto nla_put_failure; 1189 nla_nest_end(skb, vf); 1190 } 1191 nla_nest_end(skb, vfinfo); 1192 } 1193 1194 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1195 goto nla_put_failure; 1196 1197 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1198 if (rtnl_link_fill(skb, dev) < 0) 1199 goto nla_put_failure; 1200 } 1201 1202 if (dev->rtnl_link_ops && 1203 dev->rtnl_link_ops->get_link_net) { 1204 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1205 1206 if (!net_eq(dev_net(dev), link_net)) { 1207 int id = peernet2id(dev_net(dev), link_net); 1208 1209 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1210 goto nla_put_failure; 1211 } 1212 } 1213 1214 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1215 goto nla_put_failure; 1216 1217 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1218 if (af_ops->fill_link_af) { 1219 struct nlattr *af; 1220 int err; 1221 1222 if (!(af = nla_nest_start(skb, af_ops->family))) 1223 goto nla_put_failure; 1224 1225 err = af_ops->fill_link_af(skb, dev); 1226 1227 /* 1228 * Caller may return ENODATA to indicate that there 1229 * was no data to be dumped. This is not an error, it 1230 * means we should trim the attribute header and 1231 * continue. 1232 */ 1233 if (err == -ENODATA) 1234 nla_nest_cancel(skb, af); 1235 else if (err < 0) 1236 goto nla_put_failure; 1237 1238 nla_nest_end(skb, af); 1239 } 1240 } 1241 1242 nla_nest_end(skb, af_spec); 1243 1244 nlmsg_end(skb, nlh); 1245 return 0; 1246 1247nla_put_failure: 1248 nlmsg_cancel(skb, nlh); 1249 return -EMSGSIZE; 1250} 1251 1252static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1253 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1254 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1255 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1256 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1257 [IFLA_MTU] = { .type = NLA_U32 }, 1258 [IFLA_LINK] = { .type = NLA_U32 }, 1259 [IFLA_MASTER] = { .type = NLA_U32 }, 1260 [IFLA_CARRIER] = { .type = NLA_U8 }, 1261 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1262 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1263 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1264 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1265 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1266 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1267 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1268 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1269 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1270 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1271 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1272 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1273 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1274 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1275 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1276 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1277 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1278 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1279 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1280 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1281}; 1282 1283static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1284 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1285 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1286 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1287 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1288}; 1289 1290static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1291 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1292 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1293 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1294 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1295 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1296 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1297 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1298}; 1299 1300static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1301 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1302 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1303 .len = PORT_PROFILE_MAX }, 1304 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1305 .len = sizeof(struct ifla_port_vsi)}, 1306 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1307 .len = PORT_UUID_MAX }, 1308 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1309 .len = PORT_UUID_MAX }, 1310 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1311 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1312}; 1313 1314static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1315{ 1316 struct net *net = sock_net(skb->sk); 1317 int h, s_h; 1318 int idx = 0, s_idx; 1319 struct net_device *dev; 1320 struct hlist_head *head; 1321 struct nlattr *tb[IFLA_MAX+1]; 1322 u32 ext_filter_mask = 0; 1323 int err; 1324 int hdrlen; 1325 1326 s_h = cb->args[0]; 1327 s_idx = cb->args[1]; 1328 1329 cb->seq = net->dev_base_seq; 1330 1331 /* A hack to preserve kernel<->userspace interface. 1332 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1333 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1334 * what iproute2 < v3.9.0 used. 1335 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1336 * attribute, its netlink message is shorter than struct ifinfomsg. 1337 */ 1338 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1339 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1340 1341 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1342 1343 if (tb[IFLA_EXT_MASK]) 1344 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1345 } 1346 1347 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1348 idx = 0; 1349 head = &net->dev_index_head[h]; 1350 hlist_for_each_entry(dev, head, index_hlist) { 1351 if (idx < s_idx) 1352 goto cont; 1353 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1354 NETLINK_CB(cb->skb).portid, 1355 cb->nlh->nlmsg_seq, 0, 1356 NLM_F_MULTI, 1357 ext_filter_mask); 1358 /* If we ran out of room on the first message, 1359 * we're in trouble 1360 */ 1361 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1362 1363 if (err < 0) 1364 goto out; 1365 1366 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1367cont: 1368 idx++; 1369 } 1370 } 1371out: 1372 cb->args[1] = idx; 1373 cb->args[0] = h; 1374 1375 return skb->len; 1376} 1377 1378int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1379{ 1380 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1381} 1382EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1383 1384struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1385{ 1386 struct net *net; 1387 /* Examine the link attributes and figure out which 1388 * network namespace we are talking about. 1389 */ 1390 if (tb[IFLA_NET_NS_PID]) 1391 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1392 else if (tb[IFLA_NET_NS_FD]) 1393 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1394 else 1395 net = get_net(src_net); 1396 return net; 1397} 1398EXPORT_SYMBOL(rtnl_link_get_net); 1399 1400static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1401{ 1402 if (dev) { 1403 if (tb[IFLA_ADDRESS] && 1404 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1405 return -EINVAL; 1406 1407 if (tb[IFLA_BROADCAST] && 1408 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1409 return -EINVAL; 1410 } 1411 1412 if (tb[IFLA_AF_SPEC]) { 1413 struct nlattr *af; 1414 int rem, err; 1415 1416 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1417 const struct rtnl_af_ops *af_ops; 1418 1419 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1420 return -EAFNOSUPPORT; 1421 1422 if (!af_ops->set_link_af) 1423 return -EOPNOTSUPP; 1424 1425 if (af_ops->validate_link_af) { 1426 err = af_ops->validate_link_af(dev, af); 1427 if (err < 0) 1428 return err; 1429 } 1430 } 1431 } 1432 1433 return 0; 1434} 1435 1436static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1437{ 1438 const struct net_device_ops *ops = dev->netdev_ops; 1439 int err = -EINVAL; 1440 1441 if (tb[IFLA_VF_MAC]) { 1442 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1443 1444 err = -EOPNOTSUPP; 1445 if (ops->ndo_set_vf_mac) 1446 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1447 ivm->mac); 1448 if (err < 0) 1449 return err; 1450 } 1451 1452 if (tb[IFLA_VF_VLAN]) { 1453 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1454 1455 err = -EOPNOTSUPP; 1456 if (ops->ndo_set_vf_vlan) 1457 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1458 ivv->qos); 1459 if (err < 0) 1460 return err; 1461 } 1462 1463 if (tb[IFLA_VF_TX_RATE]) { 1464 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1465 struct ifla_vf_info ivf; 1466 1467 err = -EOPNOTSUPP; 1468 if (ops->ndo_get_vf_config) 1469 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1470 if (err < 0) 1471 return err; 1472 1473 err = -EOPNOTSUPP; 1474 if (ops->ndo_set_vf_rate) 1475 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1476 ivf.min_tx_rate, 1477 ivt->rate); 1478 if (err < 0) 1479 return err; 1480 } 1481 1482 if (tb[IFLA_VF_RATE]) { 1483 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1484 1485 err = -EOPNOTSUPP; 1486 if (ops->ndo_set_vf_rate) 1487 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1488 ivt->min_tx_rate, 1489 ivt->max_tx_rate); 1490 if (err < 0) 1491 return err; 1492 } 1493 1494 if (tb[IFLA_VF_SPOOFCHK]) { 1495 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1496 1497 err = -EOPNOTSUPP; 1498 if (ops->ndo_set_vf_spoofchk) 1499 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1500 ivs->setting); 1501 if (err < 0) 1502 return err; 1503 } 1504 1505 if (tb[IFLA_VF_LINK_STATE]) { 1506 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1507 1508 err = -EOPNOTSUPP; 1509 if (ops->ndo_set_vf_link_state) 1510 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1511 ivl->link_state); 1512 if (err < 0) 1513 return err; 1514 } 1515 1516 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1517 struct ifla_vf_rss_query_en *ivrssq_en; 1518 1519 err = -EOPNOTSUPP; 1520 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1521 if (ops->ndo_set_vf_rss_query_en) 1522 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1523 ivrssq_en->setting); 1524 if (err < 0) 1525 return err; 1526 } 1527 1528 return err; 1529} 1530 1531static int do_set_master(struct net_device *dev, int ifindex) 1532{ 1533 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1534 const struct net_device_ops *ops; 1535 int err; 1536 1537 if (upper_dev) { 1538 if (upper_dev->ifindex == ifindex) 1539 return 0; 1540 ops = upper_dev->netdev_ops; 1541 if (ops->ndo_del_slave) { 1542 err = ops->ndo_del_slave(upper_dev, dev); 1543 if (err) 1544 return err; 1545 } else { 1546 return -EOPNOTSUPP; 1547 } 1548 } 1549 1550 if (ifindex) { 1551 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1552 if (!upper_dev) 1553 return -EINVAL; 1554 ops = upper_dev->netdev_ops; 1555 if (ops->ndo_add_slave) { 1556 err = ops->ndo_add_slave(upper_dev, dev); 1557 if (err) 1558 return err; 1559 } else { 1560 return -EOPNOTSUPP; 1561 } 1562 } 1563 return 0; 1564} 1565 1566#define DO_SETLINK_MODIFIED 0x01 1567/* notify flag means notify + modified. */ 1568#define DO_SETLINK_NOTIFY 0x03 1569static int do_setlink(const struct sk_buff *skb, 1570 struct net_device *dev, struct ifinfomsg *ifm, 1571 struct nlattr **tb, char *ifname, int status) 1572{ 1573 const struct net_device_ops *ops = dev->netdev_ops; 1574 int err; 1575 1576 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1577 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1578 if (IS_ERR(net)) { 1579 err = PTR_ERR(net); 1580 goto errout; 1581 } 1582 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1583 put_net(net); 1584 err = -EPERM; 1585 goto errout; 1586 } 1587 err = dev_change_net_namespace(dev, net, ifname); 1588 put_net(net); 1589 if (err) 1590 goto errout; 1591 status |= DO_SETLINK_MODIFIED; 1592 } 1593 1594 if (tb[IFLA_MAP]) { 1595 struct rtnl_link_ifmap *u_map; 1596 struct ifmap k_map; 1597 1598 if (!ops->ndo_set_config) { 1599 err = -EOPNOTSUPP; 1600 goto errout; 1601 } 1602 1603 if (!netif_device_present(dev)) { 1604 err = -ENODEV; 1605 goto errout; 1606 } 1607 1608 u_map = nla_data(tb[IFLA_MAP]); 1609 k_map.mem_start = (unsigned long) u_map->mem_start; 1610 k_map.mem_end = (unsigned long) u_map->mem_end; 1611 k_map.base_addr = (unsigned short) u_map->base_addr; 1612 k_map.irq = (unsigned char) u_map->irq; 1613 k_map.dma = (unsigned char) u_map->dma; 1614 k_map.port = (unsigned char) u_map->port; 1615 1616 err = ops->ndo_set_config(dev, &k_map); 1617 if (err < 0) 1618 goto errout; 1619 1620 status |= DO_SETLINK_NOTIFY; 1621 } 1622 1623 if (tb[IFLA_ADDRESS]) { 1624 struct sockaddr *sa; 1625 int len; 1626 1627 len = sizeof(sa_family_t) + dev->addr_len; 1628 sa = kmalloc(len, GFP_KERNEL); 1629 if (!sa) { 1630 err = -ENOMEM; 1631 goto errout; 1632 } 1633 sa->sa_family = dev->type; 1634 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1635 dev->addr_len); 1636 err = dev_set_mac_address(dev, sa); 1637 kfree(sa); 1638 if (err) 1639 goto errout; 1640 status |= DO_SETLINK_MODIFIED; 1641 } 1642 1643 if (tb[IFLA_MTU]) { 1644 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1645 if (err < 0) 1646 goto errout; 1647 status |= DO_SETLINK_MODIFIED; 1648 } 1649 1650 if (tb[IFLA_GROUP]) { 1651 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1652 status |= DO_SETLINK_NOTIFY; 1653 } 1654 1655 /* 1656 * Interface selected by interface index but interface 1657 * name provided implies that a name change has been 1658 * requested. 1659 */ 1660 if (ifm->ifi_index > 0 && ifname[0]) { 1661 err = dev_change_name(dev, ifname); 1662 if (err < 0) 1663 goto errout; 1664 status |= DO_SETLINK_MODIFIED; 1665 } 1666 1667 if (tb[IFLA_IFALIAS]) { 1668 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1669 nla_len(tb[IFLA_IFALIAS])); 1670 if (err < 0) 1671 goto errout; 1672 status |= DO_SETLINK_NOTIFY; 1673 } 1674 1675 if (tb[IFLA_BROADCAST]) { 1676 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1677 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1678 } 1679 1680 if (ifm->ifi_flags || ifm->ifi_change) { 1681 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1682 if (err < 0) 1683 goto errout; 1684 } 1685 1686 if (tb[IFLA_MASTER]) { 1687 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1688 if (err) 1689 goto errout; 1690 status |= DO_SETLINK_MODIFIED; 1691 } 1692 1693 if (tb[IFLA_CARRIER]) { 1694 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 1695 if (err) 1696 goto errout; 1697 status |= DO_SETLINK_MODIFIED; 1698 } 1699 1700 if (tb[IFLA_TXQLEN]) { 1701 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 1702 1703 if (dev->tx_queue_len ^ value) 1704 status |= DO_SETLINK_NOTIFY; 1705 1706 dev->tx_queue_len = value; 1707 } 1708 1709 if (tb[IFLA_OPERSTATE]) 1710 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1711 1712 if (tb[IFLA_LINKMODE]) { 1713 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 1714 1715 write_lock_bh(&dev_base_lock); 1716 if (dev->link_mode ^ value) 1717 status |= DO_SETLINK_NOTIFY; 1718 dev->link_mode = value; 1719 write_unlock_bh(&dev_base_lock); 1720 } 1721 1722 if (tb[IFLA_VFINFO_LIST]) { 1723 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 1724 struct nlattr *attr; 1725 int rem; 1726 1727 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1728 if (nla_type(attr) != IFLA_VF_INFO || 1729 nla_len(attr) < NLA_HDRLEN) { 1730 err = -EINVAL; 1731 goto errout; 1732 } 1733 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 1734 ifla_vf_policy); 1735 if (err < 0) 1736 goto errout; 1737 err = do_setvfinfo(dev, vfinfo); 1738 if (err < 0) 1739 goto errout; 1740 status |= DO_SETLINK_NOTIFY; 1741 } 1742 } 1743 err = 0; 1744 1745 if (tb[IFLA_VF_PORTS]) { 1746 struct nlattr *port[IFLA_PORT_MAX+1]; 1747 struct nlattr *attr; 1748 int vf; 1749 int rem; 1750 1751 err = -EOPNOTSUPP; 1752 if (!ops->ndo_set_vf_port) 1753 goto errout; 1754 1755 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1756 if (nla_type(attr) != IFLA_VF_PORT) 1757 continue; 1758 err = nla_parse_nested(port, IFLA_PORT_MAX, 1759 attr, ifla_port_policy); 1760 if (err < 0) 1761 goto errout; 1762 if (!port[IFLA_PORT_VF]) { 1763 err = -EOPNOTSUPP; 1764 goto errout; 1765 } 1766 vf = nla_get_u32(port[IFLA_PORT_VF]); 1767 err = ops->ndo_set_vf_port(dev, vf, port); 1768 if (err < 0) 1769 goto errout; 1770 status |= DO_SETLINK_NOTIFY; 1771 } 1772 } 1773 err = 0; 1774 1775 if (tb[IFLA_PORT_SELF]) { 1776 struct nlattr *port[IFLA_PORT_MAX+1]; 1777 1778 err = nla_parse_nested(port, IFLA_PORT_MAX, 1779 tb[IFLA_PORT_SELF], ifla_port_policy); 1780 if (err < 0) 1781 goto errout; 1782 1783 err = -EOPNOTSUPP; 1784 if (ops->ndo_set_vf_port) 1785 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1786 if (err < 0) 1787 goto errout; 1788 status |= DO_SETLINK_NOTIFY; 1789 } 1790 1791 if (tb[IFLA_AF_SPEC]) { 1792 struct nlattr *af; 1793 int rem; 1794 1795 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1796 const struct rtnl_af_ops *af_ops; 1797 1798 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1799 BUG(); 1800 1801 err = af_ops->set_link_af(dev, af); 1802 if (err < 0) 1803 goto errout; 1804 1805 status |= DO_SETLINK_NOTIFY; 1806 } 1807 } 1808 err = 0; 1809 1810errout: 1811 if (status & DO_SETLINK_MODIFIED) { 1812 if (status & DO_SETLINK_NOTIFY) 1813 netdev_state_change(dev); 1814 1815 if (err < 0) 1816 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", 1817 dev->name); 1818 } 1819 1820 return err; 1821} 1822 1823static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 1824{ 1825 struct net *net = sock_net(skb->sk); 1826 struct ifinfomsg *ifm; 1827 struct net_device *dev; 1828 int err; 1829 struct nlattr *tb[IFLA_MAX+1]; 1830 char ifname[IFNAMSIZ]; 1831 1832 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1833 if (err < 0) 1834 goto errout; 1835 1836 if (tb[IFLA_IFNAME]) 1837 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1838 else 1839 ifname[0] = '\0'; 1840 1841 err = -EINVAL; 1842 ifm = nlmsg_data(nlh); 1843 if (ifm->ifi_index > 0) 1844 dev = __dev_get_by_index(net, ifm->ifi_index); 1845 else if (tb[IFLA_IFNAME]) 1846 dev = __dev_get_by_name(net, ifname); 1847 else 1848 goto errout; 1849 1850 if (dev == NULL) { 1851 err = -ENODEV; 1852 goto errout; 1853 } 1854 1855 err = validate_linkmsg(dev, tb); 1856 if (err < 0) 1857 goto errout; 1858 1859 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 1860errout: 1861 return err; 1862} 1863 1864static int rtnl_group_dellink(const struct net *net, int group) 1865{ 1866 struct net_device *dev, *aux; 1867 LIST_HEAD(list_kill); 1868 bool found = false; 1869 1870 if (!group) 1871 return -EPERM; 1872 1873 for_each_netdev(net, dev) { 1874 if (dev->group == group) { 1875 const struct rtnl_link_ops *ops; 1876 1877 found = true; 1878 ops = dev->rtnl_link_ops; 1879 if (!ops || !ops->dellink) 1880 return -EOPNOTSUPP; 1881 } 1882 } 1883 1884 if (!found) 1885 return -ENODEV; 1886 1887 for_each_netdev_safe(net, dev, aux) { 1888 if (dev->group == group) { 1889 const struct rtnl_link_ops *ops; 1890 1891 ops = dev->rtnl_link_ops; 1892 ops->dellink(dev, &list_kill); 1893 } 1894 } 1895 unregister_netdevice_many(&list_kill); 1896 1897 return 0; 1898} 1899 1900static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 1901{ 1902 struct net *net = sock_net(skb->sk); 1903 const struct rtnl_link_ops *ops; 1904 struct net_device *dev; 1905 struct ifinfomsg *ifm; 1906 char ifname[IFNAMSIZ]; 1907 struct nlattr *tb[IFLA_MAX+1]; 1908 int err; 1909 LIST_HEAD(list_kill); 1910 1911 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1912 if (err < 0) 1913 return err; 1914 1915 if (tb[IFLA_IFNAME]) 1916 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1917 1918 ifm = nlmsg_data(nlh); 1919 if (ifm->ifi_index > 0) 1920 dev = __dev_get_by_index(net, ifm->ifi_index); 1921 else if (tb[IFLA_IFNAME]) 1922 dev = __dev_get_by_name(net, ifname); 1923 else if (tb[IFLA_GROUP]) 1924 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 1925 else 1926 return -EINVAL; 1927 1928 if (!dev) 1929 return -ENODEV; 1930 1931 ops = dev->rtnl_link_ops; 1932 if (!ops || !ops->dellink) 1933 return -EOPNOTSUPP; 1934 1935 ops->dellink(dev, &list_kill); 1936 unregister_netdevice_many(&list_kill); 1937 return 0; 1938} 1939 1940int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 1941{ 1942 unsigned int old_flags; 1943 int err; 1944 1945 old_flags = dev->flags; 1946 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 1947 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1948 if (err < 0) 1949 return err; 1950 } 1951 1952 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 1953 1954 __dev_notify_flags(dev, old_flags, ~0U); 1955 return 0; 1956} 1957EXPORT_SYMBOL(rtnl_configure_link); 1958 1959struct net_device *rtnl_create_link(struct net *net, 1960 const char *ifname, unsigned char name_assign_type, 1961 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 1962{ 1963 int err; 1964 struct net_device *dev; 1965 unsigned int num_tx_queues = 1; 1966 unsigned int num_rx_queues = 1; 1967 1968 if (tb[IFLA_NUM_TX_QUEUES]) 1969 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 1970 else if (ops->get_num_tx_queues) 1971 num_tx_queues = ops->get_num_tx_queues(); 1972 1973 if (tb[IFLA_NUM_RX_QUEUES]) 1974 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 1975 else if (ops->get_num_rx_queues) 1976 num_rx_queues = ops->get_num_rx_queues(); 1977 1978 err = -ENOMEM; 1979 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 1980 ops->setup, num_tx_queues, num_rx_queues); 1981 if (!dev) 1982 goto err; 1983 1984 dev_net_set(dev, net); 1985 dev->rtnl_link_ops = ops; 1986 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 1987 1988 if (tb[IFLA_MTU]) 1989 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1990 if (tb[IFLA_ADDRESS]) { 1991 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1992 nla_len(tb[IFLA_ADDRESS])); 1993 dev->addr_assign_type = NET_ADDR_SET; 1994 } 1995 if (tb[IFLA_BROADCAST]) 1996 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1997 nla_len(tb[IFLA_BROADCAST])); 1998 if (tb[IFLA_TXQLEN]) 1999 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2000 if (tb[IFLA_OPERSTATE]) 2001 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2002 if (tb[IFLA_LINKMODE]) 2003 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2004 if (tb[IFLA_GROUP]) 2005 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2006 2007 return dev; 2008 2009err: 2010 return ERR_PTR(err); 2011} 2012EXPORT_SYMBOL(rtnl_create_link); 2013 2014static int rtnl_group_changelink(const struct sk_buff *skb, 2015 struct net *net, int group, 2016 struct ifinfomsg *ifm, 2017 struct nlattr **tb) 2018{ 2019 struct net_device *dev, *aux; 2020 int err; 2021 2022 for_each_netdev_safe(net, dev, aux) { 2023 if (dev->group == group) { 2024 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2025 if (err < 0) 2026 return err; 2027 } 2028 } 2029 2030 return 0; 2031} 2032 2033static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2034{ 2035 struct net *net = sock_net(skb->sk); 2036 const struct rtnl_link_ops *ops; 2037 const struct rtnl_link_ops *m_ops = NULL; 2038 struct net_device *dev; 2039 struct net_device *master_dev = NULL; 2040 struct ifinfomsg *ifm; 2041 char kind[MODULE_NAME_LEN]; 2042 char ifname[IFNAMSIZ]; 2043 struct nlattr *tb[IFLA_MAX+1]; 2044 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2045 unsigned char name_assign_type = NET_NAME_USER; 2046 int err; 2047 2048#ifdef CONFIG_MODULES 2049replay: 2050#endif 2051 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2052 if (err < 0) 2053 return err; 2054 2055 if (tb[IFLA_IFNAME]) 2056 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2057 else 2058 ifname[0] = '\0'; 2059 2060 ifm = nlmsg_data(nlh); 2061 if (ifm->ifi_index > 0) 2062 dev = __dev_get_by_index(net, ifm->ifi_index); 2063 else { 2064 if (ifname[0]) 2065 dev = __dev_get_by_name(net, ifname); 2066 else 2067 dev = NULL; 2068 } 2069 2070 if (dev) { 2071 master_dev = netdev_master_upper_dev_get(dev); 2072 if (master_dev) 2073 m_ops = master_dev->rtnl_link_ops; 2074 } 2075 2076 err = validate_linkmsg(dev, tb); 2077 if (err < 0) 2078 return err; 2079 2080 if (tb[IFLA_LINKINFO]) { 2081 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2082 tb[IFLA_LINKINFO], ifla_info_policy); 2083 if (err < 0) 2084 return err; 2085 } else 2086 memset(linkinfo, 0, sizeof(linkinfo)); 2087 2088 if (linkinfo[IFLA_INFO_KIND]) { 2089 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2090 ops = rtnl_link_ops_get(kind); 2091 } else { 2092 kind[0] = '\0'; 2093 ops = NULL; 2094 } 2095 2096 if (1) { 2097 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2098 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2099 struct nlattr **data = NULL; 2100 struct nlattr **slave_data = NULL; 2101 struct net *dest_net, *link_net = NULL; 2102 2103 if (ops) { 2104 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2105 err = nla_parse_nested(attr, ops->maxtype, 2106 linkinfo[IFLA_INFO_DATA], 2107 ops->policy); 2108 if (err < 0) 2109 return err; 2110 data = attr; 2111 } 2112 if (ops->validate) { 2113 err = ops->validate(tb, data); 2114 if (err < 0) 2115 return err; 2116 } 2117 } 2118 2119 if (m_ops) { 2120 if (m_ops->slave_maxtype && 2121 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2122 err = nla_parse_nested(slave_attr, 2123 m_ops->slave_maxtype, 2124 linkinfo[IFLA_INFO_SLAVE_DATA], 2125 m_ops->slave_policy); 2126 if (err < 0) 2127 return err; 2128 slave_data = slave_attr; 2129 } 2130 if (m_ops->slave_validate) { 2131 err = m_ops->slave_validate(tb, slave_data); 2132 if (err < 0) 2133 return err; 2134 } 2135 } 2136 2137 if (dev) { 2138 int status = 0; 2139 2140 if (nlh->nlmsg_flags & NLM_F_EXCL) 2141 return -EEXIST; 2142 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2143 return -EOPNOTSUPP; 2144 2145 if (linkinfo[IFLA_INFO_DATA]) { 2146 if (!ops || ops != dev->rtnl_link_ops || 2147 !ops->changelink) 2148 return -EOPNOTSUPP; 2149 2150 err = ops->changelink(dev, tb, data); 2151 if (err < 0) 2152 return err; 2153 status |= DO_SETLINK_NOTIFY; 2154 } 2155 2156 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2157 if (!m_ops || !m_ops->slave_changelink) 2158 return -EOPNOTSUPP; 2159 2160 err = m_ops->slave_changelink(master_dev, dev, 2161 tb, slave_data); 2162 if (err < 0) 2163 return err; 2164 status |= DO_SETLINK_NOTIFY; 2165 } 2166 2167 return do_setlink(skb, dev, ifm, tb, ifname, status); 2168 } 2169 2170 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2171 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2172 return rtnl_group_changelink(skb, net, 2173 nla_get_u32(tb[IFLA_GROUP]), 2174 ifm, tb); 2175 return -ENODEV; 2176 } 2177 2178 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2179 return -EOPNOTSUPP; 2180 2181 if (!ops) { 2182#ifdef CONFIG_MODULES 2183 if (kind[0]) { 2184 __rtnl_unlock(); 2185 request_module("rtnl-link-%s", kind); 2186 rtnl_lock(); 2187 ops = rtnl_link_ops_get(kind); 2188 if (ops) 2189 goto replay; 2190 } 2191#endif 2192 return -EOPNOTSUPP; 2193 } 2194 2195 if (!ops->setup) 2196 return -EOPNOTSUPP; 2197 2198 if (!ifname[0]) { 2199 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2200 name_assign_type = NET_NAME_ENUM; 2201 } 2202 2203 dest_net = rtnl_link_get_net(net, tb); 2204 if (IS_ERR(dest_net)) 2205 return PTR_ERR(dest_net); 2206 2207 err = -EPERM; 2208 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2209 goto out; 2210 2211 if (tb[IFLA_LINK_NETNSID]) { 2212 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2213 2214 link_net = get_net_ns_by_id(dest_net, id); 2215 if (!link_net) { 2216 err = -EINVAL; 2217 goto out; 2218 } 2219 err = -EPERM; 2220 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2221 goto out; 2222 } 2223 2224 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2225 name_assign_type, ops, tb); 2226 if (IS_ERR(dev)) { 2227 err = PTR_ERR(dev); 2228 goto out; 2229 } 2230 2231 dev->ifindex = ifm->ifi_index; 2232 2233 if (ops->newlink) { 2234 err = ops->newlink(link_net ? : net, dev, tb, data); 2235 /* Drivers should call free_netdev() in ->destructor 2236 * and unregister it on failure after registration 2237 * so that device could be finally freed in rtnl_unlock. 2238 */ 2239 if (err < 0) { 2240 /* If device is not registered at all, free it now */ 2241 if (dev->reg_state == NETREG_UNINITIALIZED) 2242 free_netdev(dev); 2243 goto out; 2244 } 2245 } else { 2246 err = register_netdevice(dev); 2247 if (err < 0) { 2248 free_netdev(dev); 2249 goto out; 2250 } 2251 } 2252 err = rtnl_configure_link(dev, ifm); 2253 if (err < 0) 2254 goto out_unregister; 2255 if (link_net) { 2256 err = dev_change_net_namespace(dev, dest_net, ifname); 2257 if (err < 0) 2258 goto out_unregister; 2259 } 2260out: 2261 if (link_net) 2262 put_net(link_net); 2263 put_net(dest_net); 2264 return err; 2265out_unregister: 2266 if (ops->newlink) { 2267 LIST_HEAD(list_kill); 2268 2269 ops->dellink(dev, &list_kill); 2270 unregister_netdevice_many(&list_kill); 2271 } else { 2272 unregister_netdevice(dev); 2273 } 2274 goto out; 2275 } 2276} 2277 2278static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2279{ 2280 struct net *net = sock_net(skb->sk); 2281 struct ifinfomsg *ifm; 2282 char ifname[IFNAMSIZ]; 2283 struct nlattr *tb[IFLA_MAX+1]; 2284 struct net_device *dev = NULL; 2285 struct sk_buff *nskb; 2286 int err; 2287 u32 ext_filter_mask = 0; 2288 2289 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2290 if (err < 0) 2291 return err; 2292 2293 if (tb[IFLA_IFNAME]) 2294 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2295 2296 if (tb[IFLA_EXT_MASK]) 2297 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2298 2299 ifm = nlmsg_data(nlh); 2300 if (ifm->ifi_index > 0) 2301 dev = __dev_get_by_index(net, ifm->ifi_index); 2302 else if (tb[IFLA_IFNAME]) 2303 dev = __dev_get_by_name(net, ifname); 2304 else 2305 return -EINVAL; 2306 2307 if (dev == NULL) 2308 return -ENODEV; 2309 2310 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2311 if (nskb == NULL) 2312 return -ENOBUFS; 2313 2314 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2315 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2316 if (err < 0) { 2317 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2318 WARN_ON(err == -EMSGSIZE); 2319 kfree_skb(nskb); 2320 } else 2321 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2322 2323 return err; 2324} 2325 2326static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2327{ 2328 struct net *net = sock_net(skb->sk); 2329 struct net_device *dev; 2330 struct nlattr *tb[IFLA_MAX+1]; 2331 u32 ext_filter_mask = 0; 2332 u16 min_ifinfo_dump_size = 0; 2333 int hdrlen; 2334 2335 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2336 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2337 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2338 2339 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2340 if (tb[IFLA_EXT_MASK]) 2341 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2342 } 2343 2344 if (!ext_filter_mask) 2345 return NLMSG_GOODSIZE; 2346 /* 2347 * traverse the list of net devices and compute the minimum 2348 * buffer size based upon the filter mask. 2349 */ 2350 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2351 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2352 if_nlmsg_size(dev, 2353 ext_filter_mask)); 2354 } 2355 2356 return min_ifinfo_dump_size; 2357} 2358 2359static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2360{ 2361 int idx; 2362 int s_idx = cb->family; 2363 2364 if (s_idx == 0) 2365 s_idx = 1; 2366 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2367 int type = cb->nlh->nlmsg_type-RTM_BASE; 2368 if (idx < s_idx || idx == PF_PACKET) 2369 continue; 2370 if (rtnl_msg_handlers[idx] == NULL || 2371 rtnl_msg_handlers[idx][type].dumpit == NULL) 2372 continue; 2373 if (idx > s_idx) { 2374 memset(&cb->args[0], 0, sizeof(cb->args)); 2375 cb->prev_seq = 0; 2376 cb->seq = 0; 2377 } 2378 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2379 break; 2380 } 2381 cb->family = idx; 2382 2383 return skb->len; 2384} 2385 2386struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2387 unsigned int change, gfp_t flags) 2388{ 2389 struct net *net = dev_net(dev); 2390 struct sk_buff *skb; 2391 int err = -ENOBUFS; 2392 size_t if_info_size; 2393 2394 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2395 if (skb == NULL) 2396 goto errout; 2397 2398 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2399 if (err < 0) { 2400 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2401 WARN_ON(err == -EMSGSIZE); 2402 kfree_skb(skb); 2403 goto errout; 2404 } 2405 return skb; 2406errout: 2407 if (err < 0) 2408 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2409 return NULL; 2410} 2411 2412void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2413{ 2414 struct net *net = dev_net(dev); 2415 2416 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2417} 2418 2419void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2420 gfp_t flags) 2421{ 2422 struct sk_buff *skb; 2423 2424 if (dev->reg_state != NETREG_REGISTERED) 2425 return; 2426 2427 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2428 if (skb) 2429 rtmsg_ifinfo_send(skb, dev, flags); 2430} 2431EXPORT_SYMBOL(rtmsg_ifinfo); 2432 2433static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2434 struct net_device *dev, 2435 u8 *addr, u16 vid, u32 pid, u32 seq, 2436 int type, unsigned int flags, 2437 int nlflags) 2438{ 2439 struct nlmsghdr *nlh; 2440 struct ndmsg *ndm; 2441 2442 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2443 if (!nlh) 2444 return -EMSGSIZE; 2445 2446 ndm = nlmsg_data(nlh); 2447 ndm->ndm_family = AF_BRIDGE; 2448 ndm->ndm_pad1 = 0; 2449 ndm->ndm_pad2 = 0; 2450 ndm->ndm_flags = flags; 2451 ndm->ndm_type = 0; 2452 ndm->ndm_ifindex = dev->ifindex; 2453 ndm->ndm_state = NUD_PERMANENT; 2454 2455 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2456 goto nla_put_failure; 2457 if (vid) 2458 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2459 goto nla_put_failure; 2460 2461 nlmsg_end(skb, nlh); 2462 return 0; 2463 2464nla_put_failure: 2465 nlmsg_cancel(skb, nlh); 2466 return -EMSGSIZE; 2467} 2468 2469static inline size_t rtnl_fdb_nlmsg_size(void) 2470{ 2471 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2472} 2473 2474static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type) 2475{ 2476 struct net *net = dev_net(dev); 2477 struct sk_buff *skb; 2478 int err = -ENOBUFS; 2479 2480 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2481 if (!skb) 2482 goto errout; 2483 2484 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2485 0, 0, type, NTF_SELF, 0); 2486 if (err < 0) { 2487 kfree_skb(skb); 2488 goto errout; 2489 } 2490 2491 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2492 return; 2493errout: 2494 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2495} 2496 2497/** 2498 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2499 */ 2500int ndo_dflt_fdb_add(struct ndmsg *ndm, 2501 struct nlattr *tb[], 2502 struct net_device *dev, 2503 const unsigned char *addr, u16 vid, 2504 u16 flags) 2505{ 2506 int err = -EINVAL; 2507 2508 /* If aging addresses are supported device will need to 2509 * implement its own handler for this. 2510 */ 2511 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2512 pr_info("%s: FDB only supports static addresses\n", dev->name); 2513 return err; 2514 } 2515 2516 if (vid) { 2517 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2518 return err; 2519 } 2520 2521 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2522 err = dev_uc_add_excl(dev, addr); 2523 else if (is_multicast_ether_addr(addr)) 2524 err = dev_mc_add_excl(dev, addr); 2525 2526 /* Only return duplicate errors if NLM_F_EXCL is set */ 2527 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2528 err = 0; 2529 2530 return err; 2531} 2532EXPORT_SYMBOL(ndo_dflt_fdb_add); 2533 2534static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2535{ 2536 u16 vid = 0; 2537 2538 if (vlan_attr) { 2539 if (nla_len(vlan_attr) != sizeof(u16)) { 2540 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2541 return -EINVAL; 2542 } 2543 2544 vid = nla_get_u16(vlan_attr); 2545 2546 if (!vid || vid >= VLAN_VID_MASK) { 2547 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2548 vid); 2549 return -EINVAL; 2550 } 2551 } 2552 *p_vid = vid; 2553 return 0; 2554} 2555 2556static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2557{ 2558 struct net *net = sock_net(skb->sk); 2559 struct ndmsg *ndm; 2560 struct nlattr *tb[NDA_MAX+1]; 2561 struct net_device *dev; 2562 u8 *addr; 2563 u16 vid; 2564 int err; 2565 2566 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2567 if (err < 0) 2568 return err; 2569 2570 ndm = nlmsg_data(nlh); 2571 if (ndm->ndm_ifindex == 0) { 2572 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2573 return -EINVAL; 2574 } 2575 2576 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2577 if (dev == NULL) { 2578 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2579 return -ENODEV; 2580 } 2581 2582 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2583 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2584 return -EINVAL; 2585 } 2586 2587 addr = nla_data(tb[NDA_LLADDR]); 2588 2589 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2590 if (err) 2591 return err; 2592 2593 err = -EOPNOTSUPP; 2594 2595 /* Support fdb on master device the net/bridge default case */ 2596 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2597 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2598 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2599 const struct net_device_ops *ops = br_dev->netdev_ops; 2600 2601 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2602 nlh->nlmsg_flags); 2603 if (err) 2604 goto out; 2605 else 2606 ndm->ndm_flags &= ~NTF_MASTER; 2607 } 2608 2609 /* Embedded bridge, macvlan, and any other device support */ 2610 if ((ndm->ndm_flags & NTF_SELF)) { 2611 if (dev->netdev_ops->ndo_fdb_add) 2612 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 2613 vid, 2614 nlh->nlmsg_flags); 2615 else 2616 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 2617 nlh->nlmsg_flags); 2618 2619 if (!err) { 2620 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH); 2621 ndm->ndm_flags &= ~NTF_SELF; 2622 } 2623 } 2624out: 2625 return err; 2626} 2627 2628/** 2629 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 2630 */ 2631int ndo_dflt_fdb_del(struct ndmsg *ndm, 2632 struct nlattr *tb[], 2633 struct net_device *dev, 2634 const unsigned char *addr, u16 vid) 2635{ 2636 int err = -EINVAL; 2637 2638 /* If aging addresses are supported device will need to 2639 * implement its own handler for this. 2640 */ 2641 if (!(ndm->ndm_state & NUD_PERMANENT)) { 2642 pr_info("%s: FDB only supports static addresses\n", dev->name); 2643 return err; 2644 } 2645 2646 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2647 err = dev_uc_del(dev, addr); 2648 else if (is_multicast_ether_addr(addr)) 2649 err = dev_mc_del(dev, addr); 2650 2651 return err; 2652} 2653EXPORT_SYMBOL(ndo_dflt_fdb_del); 2654 2655static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 2656{ 2657 struct net *net = sock_net(skb->sk); 2658 struct ndmsg *ndm; 2659 struct nlattr *tb[NDA_MAX+1]; 2660 struct net_device *dev; 2661 int err = -EINVAL; 2662 __u8 *addr; 2663 u16 vid; 2664 2665 if (!netlink_capable(skb, CAP_NET_ADMIN)) 2666 return -EPERM; 2667 2668 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2669 if (err < 0) 2670 return err; 2671 2672 ndm = nlmsg_data(nlh); 2673 if (ndm->ndm_ifindex == 0) { 2674 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2675 return -EINVAL; 2676 } 2677 2678 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2679 if (dev == NULL) { 2680 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2681 return -ENODEV; 2682 } 2683 2684 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2685 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 2686 return -EINVAL; 2687 } 2688 2689 addr = nla_data(tb[NDA_LLADDR]); 2690 2691 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2692 if (err) 2693 return err; 2694 2695 err = -EOPNOTSUPP; 2696 2697 /* Support fdb on master device the net/bridge default case */ 2698 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2699 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2700 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2701 const struct net_device_ops *ops = br_dev->netdev_ops; 2702 2703 if (ops->ndo_fdb_del) 2704 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 2705 2706 if (err) 2707 goto out; 2708 else 2709 ndm->ndm_flags &= ~NTF_MASTER; 2710 } 2711 2712 /* Embedded bridge, macvlan, and any other device support */ 2713 if (ndm->ndm_flags & NTF_SELF) { 2714 if (dev->netdev_ops->ndo_fdb_del) 2715 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 2716 vid); 2717 else 2718 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 2719 2720 if (!err) { 2721 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH); 2722 ndm->ndm_flags &= ~NTF_SELF; 2723 } 2724 } 2725out: 2726 return err; 2727} 2728 2729static int nlmsg_populate_fdb(struct sk_buff *skb, 2730 struct netlink_callback *cb, 2731 struct net_device *dev, 2732 int *idx, 2733 struct netdev_hw_addr_list *list) 2734{ 2735 struct netdev_hw_addr *ha; 2736 int err; 2737 u32 portid, seq; 2738 2739 portid = NETLINK_CB(cb->skb).portid; 2740 seq = cb->nlh->nlmsg_seq; 2741 2742 list_for_each_entry(ha, &list->list, list) { 2743 if (*idx < cb->args[0]) 2744 goto skip; 2745 2746 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 2747 portid, seq, 2748 RTM_NEWNEIGH, NTF_SELF, 2749 NLM_F_MULTI); 2750 if (err < 0) 2751 return err; 2752skip: 2753 *idx += 1; 2754 } 2755 return 0; 2756} 2757 2758/** 2759 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2760 * @nlh: netlink message header 2761 * @dev: netdevice 2762 * 2763 * Default netdevice operation to dump the existing unicast address list. 2764 * Returns number of addresses from list put in skb. 2765 */ 2766int ndo_dflt_fdb_dump(struct sk_buff *skb, 2767 struct netlink_callback *cb, 2768 struct net_device *dev, 2769 struct net_device *filter_dev, 2770 int idx) 2771{ 2772 int err; 2773 2774 netif_addr_lock_bh(dev); 2775 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 2776 if (err) 2777 goto out; 2778 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 2779out: 2780 netif_addr_unlock_bh(dev); 2781 return idx; 2782} 2783EXPORT_SYMBOL(ndo_dflt_fdb_dump); 2784 2785static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 2786{ 2787 struct net_device *dev; 2788 struct nlattr *tb[IFLA_MAX+1]; 2789 struct net_device *br_dev = NULL; 2790 const struct net_device_ops *ops = NULL; 2791 const struct net_device_ops *cops = NULL; 2792 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 2793 struct net *net = sock_net(skb->sk); 2794 int brport_idx = 0; 2795 int br_idx = 0; 2796 int idx = 0; 2797 2798 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 2799 ifla_policy) == 0) { 2800 if (tb[IFLA_MASTER]) 2801 br_idx = nla_get_u32(tb[IFLA_MASTER]); 2802 } 2803 2804 brport_idx = ifm->ifi_index; 2805 2806 if (br_idx) { 2807 br_dev = __dev_get_by_index(net, br_idx); 2808 if (!br_dev) 2809 return -ENODEV; 2810 2811 ops = br_dev->netdev_ops; 2812 } 2813 2814 for_each_netdev(net, dev) { 2815 if (brport_idx && (dev->ifindex != brport_idx)) 2816 continue; 2817 2818 if (!br_idx) { /* user did not specify a specific bridge */ 2819 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2820 br_dev = netdev_master_upper_dev_get(dev); 2821 cops = br_dev->netdev_ops; 2822 } 2823 2824 } else { 2825 if (dev != br_dev && 2826 !(dev->priv_flags & IFF_BRIDGE_PORT)) 2827 continue; 2828 2829 if (br_dev != netdev_master_upper_dev_get(dev) && 2830 !(dev->priv_flags & IFF_EBRIDGE)) 2831 continue; 2832 2833 cops = ops; 2834 } 2835 2836 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2837 if (cops && cops->ndo_fdb_dump) 2838 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev, 2839 idx); 2840 } 2841 2842 if (dev->netdev_ops->ndo_fdb_dump) 2843 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL, 2844 idx); 2845 else 2846 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); 2847 2848 cops = NULL; 2849 } 2850 2851 cb->args[0] = idx; 2852 return skb->len; 2853} 2854 2855static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 2856 unsigned int attrnum, unsigned int flag) 2857{ 2858 if (mask & flag) 2859 return nla_put_u8(skb, attrnum, !!(flags & flag)); 2860 return 0; 2861} 2862 2863int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 2864 struct net_device *dev, u16 mode, 2865 u32 flags, u32 mask, int nlflags) 2866{ 2867 struct nlmsghdr *nlh; 2868 struct ifinfomsg *ifm; 2869 struct nlattr *br_afspec; 2870 struct nlattr *protinfo; 2871 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 2872 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2873 2874 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 2875 if (nlh == NULL) 2876 return -EMSGSIZE; 2877 2878 ifm = nlmsg_data(nlh); 2879 ifm->ifi_family = AF_BRIDGE; 2880 ifm->__ifi_pad = 0; 2881 ifm->ifi_type = dev->type; 2882 ifm->ifi_index = dev->ifindex; 2883 ifm->ifi_flags = dev_get_flags(dev); 2884 ifm->ifi_change = 0; 2885 2886 2887 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 2888 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 2889 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 2890 (br_dev && 2891 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 2892 (dev->addr_len && 2893 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 2894 (dev->ifindex != dev_get_iflink(dev) && 2895 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 2896 goto nla_put_failure; 2897 2898 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 2899 if (!br_afspec) 2900 goto nla_put_failure; 2901 2902 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 2903 nla_nest_cancel(skb, br_afspec); 2904 goto nla_put_failure; 2905 } 2906 2907 if (mode != BRIDGE_MODE_UNDEF) { 2908 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 2909 nla_nest_cancel(skb, br_afspec); 2910 goto nla_put_failure; 2911 } 2912 } 2913 nla_nest_end(skb, br_afspec); 2914 2915 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 2916 if (!protinfo) 2917 goto nla_put_failure; 2918 2919 if (brport_nla_put_flag(skb, flags, mask, 2920 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 2921 brport_nla_put_flag(skb, flags, mask, 2922 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 2923 brport_nla_put_flag(skb, flags, mask, 2924 IFLA_BRPORT_FAST_LEAVE, 2925 BR_MULTICAST_FAST_LEAVE) || 2926 brport_nla_put_flag(skb, flags, mask, 2927 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 2928 brport_nla_put_flag(skb, flags, mask, 2929 IFLA_BRPORT_LEARNING, BR_LEARNING) || 2930 brport_nla_put_flag(skb, flags, mask, 2931 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 2932 brport_nla_put_flag(skb, flags, mask, 2933 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 2934 brport_nla_put_flag(skb, flags, mask, 2935 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 2936 nla_nest_cancel(skb, protinfo); 2937 goto nla_put_failure; 2938 } 2939 2940 nla_nest_end(skb, protinfo); 2941 2942 nlmsg_end(skb, nlh); 2943 return 0; 2944nla_put_failure: 2945 nlmsg_cancel(skb, nlh); 2946 return -EMSGSIZE; 2947} 2948EXPORT_SYMBOL(ndo_dflt_bridge_getlink); 2949 2950static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 2951{ 2952 struct net *net = sock_net(skb->sk); 2953 struct net_device *dev; 2954 int idx = 0; 2955 u32 portid = NETLINK_CB(cb->skb).portid; 2956 u32 seq = cb->nlh->nlmsg_seq; 2957 u32 filter_mask = 0; 2958 2959 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 2960 struct nlattr *extfilt; 2961 2962 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 2963 IFLA_EXT_MASK); 2964 if (extfilt) { 2965 if (nla_len(extfilt) < sizeof(filter_mask)) 2966 return -EINVAL; 2967 2968 filter_mask = nla_get_u32(extfilt); 2969 } 2970 } 2971 2972 rcu_read_lock(); 2973 for_each_netdev_rcu(net, dev) { 2974 const struct net_device_ops *ops = dev->netdev_ops; 2975 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2976 2977 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 2978 if (idx >= cb->args[0] && 2979 br_dev->netdev_ops->ndo_bridge_getlink( 2980 skb, portid, seq, dev, filter_mask, 2981 NLM_F_MULTI) < 0) 2982 break; 2983 idx++; 2984 } 2985 2986 if (ops->ndo_bridge_getlink) { 2987 if (idx >= cb->args[0] && 2988 ops->ndo_bridge_getlink(skb, portid, seq, dev, 2989 filter_mask, 2990 NLM_F_MULTI) < 0) 2991 break; 2992 idx++; 2993 } 2994 } 2995 rcu_read_unlock(); 2996 cb->args[0] = idx; 2997 2998 return skb->len; 2999} 3000 3001static inline size_t bridge_nlmsg_size(void) 3002{ 3003 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3004 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3005 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3006 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3007 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3008 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3009 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3010 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3011 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3012 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3013 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3014} 3015 3016static int rtnl_bridge_notify(struct net_device *dev) 3017{ 3018 struct net *net = dev_net(dev); 3019 struct sk_buff *skb; 3020 int err = -EOPNOTSUPP; 3021 3022 if (!dev->netdev_ops->ndo_bridge_getlink) 3023 return 0; 3024 3025 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3026 if (!skb) { 3027 err = -ENOMEM; 3028 goto errout; 3029 } 3030 3031 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3032 if (err < 0) 3033 goto errout; 3034 3035 if (!skb->len) 3036 goto errout; 3037 3038 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3039 return 0; 3040errout: 3041 WARN_ON(err == -EMSGSIZE); 3042 kfree_skb(skb); 3043 if (err) 3044 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3045 return err; 3046} 3047 3048static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3049{ 3050 struct net *net = sock_net(skb->sk); 3051 struct ifinfomsg *ifm; 3052 struct net_device *dev; 3053 struct nlattr *br_spec, *attr = NULL; 3054 int rem, err = -EOPNOTSUPP; 3055 u16 flags = 0; 3056 bool have_flags = false; 3057 3058 if (nlmsg_len(nlh) < sizeof(*ifm)) 3059 return -EINVAL; 3060 3061 ifm = nlmsg_data(nlh); 3062 if (ifm->ifi_family != AF_BRIDGE) 3063 return -EPFNOSUPPORT; 3064 3065 dev = __dev_get_by_index(net, ifm->ifi_index); 3066 if (!dev) { 3067 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3068 return -ENODEV; 3069 } 3070 3071 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3072 if (br_spec) { 3073 nla_for_each_nested(attr, br_spec, rem) { 3074 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3075 if (nla_len(attr) < sizeof(flags)) 3076 return -EINVAL; 3077 3078 have_flags = true; 3079 flags = nla_get_u16(attr); 3080 break; 3081 } 3082 } 3083 } 3084 3085 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3086 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3087 3088 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3089 err = -EOPNOTSUPP; 3090 goto out; 3091 } 3092 3093 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3094 if (err) 3095 goto out; 3096 3097 flags &= ~BRIDGE_FLAGS_MASTER; 3098 } 3099 3100 if ((flags & BRIDGE_FLAGS_SELF)) { 3101 if (!dev->netdev_ops->ndo_bridge_setlink) 3102 err = -EOPNOTSUPP; 3103 else 3104 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3105 flags); 3106 if (!err) { 3107 flags &= ~BRIDGE_FLAGS_SELF; 3108 3109 /* Generate event to notify upper layer of bridge 3110 * change 3111 */ 3112 err = rtnl_bridge_notify(dev); 3113 } 3114 } 3115 3116 if (have_flags) 3117 memcpy(nla_data(attr), &flags, sizeof(flags)); 3118out: 3119 return err; 3120} 3121 3122static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3123{ 3124 struct net *net = sock_net(skb->sk); 3125 struct ifinfomsg *ifm; 3126 struct net_device *dev; 3127 struct nlattr *br_spec, *attr = NULL; 3128 int rem, err = -EOPNOTSUPP; 3129 u16 flags = 0; 3130 bool have_flags = false; 3131 3132 if (nlmsg_len(nlh) < sizeof(*ifm)) 3133 return -EINVAL; 3134 3135 ifm = nlmsg_data(nlh); 3136 if (ifm->ifi_family != AF_BRIDGE) 3137 return -EPFNOSUPPORT; 3138 3139 dev = __dev_get_by_index(net, ifm->ifi_index); 3140 if (!dev) { 3141 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3142 return -ENODEV; 3143 } 3144 3145 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3146 if (br_spec) { 3147 nla_for_each_nested(attr, br_spec, rem) { 3148 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3149 if (nla_len(attr) < sizeof(flags)) 3150 return -EINVAL; 3151 3152 have_flags = true; 3153 flags = nla_get_u16(attr); 3154 break; 3155 } 3156 } 3157 } 3158 3159 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3160 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3161 3162 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3163 err = -EOPNOTSUPP; 3164 goto out; 3165 } 3166 3167 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3168 if (err) 3169 goto out; 3170 3171 flags &= ~BRIDGE_FLAGS_MASTER; 3172 } 3173 3174 if ((flags & BRIDGE_FLAGS_SELF)) { 3175 if (!dev->netdev_ops->ndo_bridge_dellink) 3176 err = -EOPNOTSUPP; 3177 else 3178 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3179 flags); 3180 3181 if (!err) { 3182 flags &= ~BRIDGE_FLAGS_SELF; 3183 3184 /* Generate event to notify upper layer of bridge 3185 * change 3186 */ 3187 err = rtnl_bridge_notify(dev); 3188 } 3189 } 3190 3191 if (have_flags) 3192 memcpy(nla_data(attr), &flags, sizeof(flags)); 3193out: 3194 return err; 3195} 3196 3197/* Process one rtnetlink message. */ 3198 3199static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3200{ 3201 struct net *net = sock_net(skb->sk); 3202 rtnl_doit_func doit; 3203 int sz_idx, kind; 3204 int family; 3205 int type; 3206 int err; 3207 3208 type = nlh->nlmsg_type; 3209 if (type > RTM_MAX) 3210 return -EOPNOTSUPP; 3211 3212 type -= RTM_BASE; 3213 3214 /* All the messages must have at least 1 byte length */ 3215 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3216 return 0; 3217 3218 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3219 sz_idx = type>>2; 3220 kind = type&3; 3221 3222 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 3223 return -EPERM; 3224 3225 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 3226 struct sock *rtnl; 3227 rtnl_dumpit_func dumpit; 3228 rtnl_calcit_func calcit; 3229 u16 min_dump_alloc = 0; 3230 3231 dumpit = rtnl_get_dumpit(family, type); 3232 if (dumpit == NULL) 3233 return -EOPNOTSUPP; 3234 calcit = rtnl_get_calcit(family, type); 3235 if (calcit) 3236 min_dump_alloc = calcit(skb, nlh); 3237 3238 __rtnl_unlock(); 3239 rtnl = net->rtnl; 3240 { 3241 struct netlink_dump_control c = { 3242 .dump = dumpit, 3243 .min_dump_alloc = min_dump_alloc, 3244 }; 3245 err = netlink_dump_start(rtnl, skb, nlh, &c); 3246 } 3247 rtnl_lock(); 3248 return err; 3249 } 3250 3251 doit = rtnl_get_doit(family, type); 3252 if (doit == NULL) 3253 return -EOPNOTSUPP; 3254 3255 return doit(skb, nlh); 3256} 3257 3258static void rtnetlink_rcv(struct sk_buff *skb) 3259{ 3260 rtnl_lock(); 3261 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 3262 rtnl_unlock(); 3263} 3264 3265static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 3266{ 3267 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3268 3269 switch (event) { 3270 case NETDEV_UP: 3271 case NETDEV_DOWN: 3272 case NETDEV_PRE_UP: 3273 case NETDEV_POST_INIT: 3274 case NETDEV_REGISTER: 3275 case NETDEV_CHANGE: 3276 case NETDEV_PRE_TYPE_CHANGE: 3277 case NETDEV_GOING_DOWN: 3278 case NETDEV_UNREGISTER: 3279 case NETDEV_UNREGISTER_FINAL: 3280 case NETDEV_RELEASE: 3281 case NETDEV_JOIN: 3282 case NETDEV_BONDING_INFO: 3283 break; 3284 default: 3285 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 3286 break; 3287 } 3288 return NOTIFY_DONE; 3289} 3290 3291static struct notifier_block rtnetlink_dev_notifier = { 3292 .notifier_call = rtnetlink_event, 3293}; 3294 3295 3296static int __net_init rtnetlink_net_init(struct net *net) 3297{ 3298 struct sock *sk; 3299 struct netlink_kernel_cfg cfg = { 3300 .groups = RTNLGRP_MAX, 3301 .input = rtnetlink_rcv, 3302 .cb_mutex = &rtnl_mutex, 3303 .flags = NL_CFG_F_NONROOT_RECV, 3304 }; 3305 3306 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 3307 if (!sk) 3308 return -ENOMEM; 3309 net->rtnl = sk; 3310 return 0; 3311} 3312 3313static void __net_exit rtnetlink_net_exit(struct net *net) 3314{ 3315 netlink_kernel_release(net->rtnl); 3316 net->rtnl = NULL; 3317} 3318 3319static struct pernet_operations rtnetlink_net_ops = { 3320 .init = rtnetlink_net_init, 3321 .exit = rtnetlink_net_exit, 3322}; 3323 3324void __init rtnetlink_init(void) 3325{ 3326 if (register_pernet_subsys(&rtnetlink_net_ops)) 3327 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 3328 3329 register_netdevice_notifier(&rtnetlink_dev_notifier); 3330 3331 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 3332 rtnl_dump_ifinfo, rtnl_calcit); 3333 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 3334 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 3335 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 3336 3337 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 3338 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 3339 3340 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 3341 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 3342 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 3343 3344 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 3345 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 3346 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 3347} 3348 3349