rtnetlink.c revision 898e506171b2c6132cdebd450ab4db81ae9a59bc
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/pci.h> 40#include <linux/etherdevice.h> 41 42#include <asm/uaccess.h> 43 44#include <linux/inet.h> 45#include <linux/netdevice.h> 46#include <net/ip.h> 47#include <net/protocol.h> 48#include <net/arp.h> 49#include <net/route.h> 50#include <net/udp.h> 51#include <net/sock.h> 52#include <net/pkt_sched.h> 53#include <net/fib_rules.h> 54#include <net/rtnetlink.h> 55#include <net/net_namespace.h> 56 57struct rtnl_link { 58 rtnl_doit_func doit; 59 rtnl_dumpit_func dumpit; 60 rtnl_calcit_func calcit; 61}; 62 63static DEFINE_MUTEX(rtnl_mutex); 64 65void rtnl_lock(void) 66{ 67 mutex_lock(&rtnl_mutex); 68} 69EXPORT_SYMBOL(rtnl_lock); 70 71void __rtnl_unlock(void) 72{ 73 mutex_unlock(&rtnl_mutex); 74} 75 76void rtnl_unlock(void) 77{ 78 /* This fellow will unlock it for us. */ 79 netdev_run_todo(); 80} 81EXPORT_SYMBOL(rtnl_unlock); 82 83int rtnl_trylock(void) 84{ 85 return mutex_trylock(&rtnl_mutex); 86} 87EXPORT_SYMBOL(rtnl_trylock); 88 89int rtnl_is_locked(void) 90{ 91 return mutex_is_locked(&rtnl_mutex); 92} 93EXPORT_SYMBOL(rtnl_is_locked); 94 95#ifdef CONFIG_PROVE_LOCKING 96int lockdep_rtnl_is_held(void) 97{ 98 return lockdep_is_held(&rtnl_mutex); 99} 100EXPORT_SYMBOL(lockdep_rtnl_is_held); 101#endif /* #ifdef CONFIG_PROVE_LOCKING */ 102 103static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 104 105static inline int rtm_msgindex(int msgtype) 106{ 107 int msgindex = msgtype - RTM_BASE; 108 109 /* 110 * msgindex < 0 implies someone tried to register a netlink 111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 112 * the message type has not been added to linux/rtnetlink.h 113 */ 114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 115 116 return msgindex; 117} 118 119static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 120{ 121 struct rtnl_link *tab; 122 123 if (protocol <= RTNL_FAMILY_MAX) 124 tab = rtnl_msg_handlers[protocol]; 125 else 126 tab = NULL; 127 128 if (tab == NULL || tab[msgindex].doit == NULL) 129 tab = rtnl_msg_handlers[PF_UNSPEC]; 130 131 return tab[msgindex].doit; 132} 133 134static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 135{ 136 struct rtnl_link *tab; 137 138 if (protocol <= RTNL_FAMILY_MAX) 139 tab = rtnl_msg_handlers[protocol]; 140 else 141 tab = NULL; 142 143 if (tab == NULL || tab[msgindex].dumpit == NULL) 144 tab = rtnl_msg_handlers[PF_UNSPEC]; 145 146 return tab[msgindex].dumpit; 147} 148 149static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 150{ 151 struct rtnl_link *tab; 152 153 if (protocol <= RTNL_FAMILY_MAX) 154 tab = rtnl_msg_handlers[protocol]; 155 else 156 tab = NULL; 157 158 if (tab == NULL || tab[msgindex].calcit == NULL) 159 tab = rtnl_msg_handlers[PF_UNSPEC]; 160 161 return tab[msgindex].calcit; 162} 163 164/** 165 * __rtnl_register - Register a rtnetlink message type 166 * @protocol: Protocol family or PF_UNSPEC 167 * @msgtype: rtnetlink message type 168 * @doit: Function pointer called for each request message 169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 170 * @calcit: Function pointer to calc size of dump message 171 * 172 * Registers the specified function pointers (at least one of them has 173 * to be non-NULL) to be called whenever a request message for the 174 * specified protocol family and message type is received. 175 * 176 * The special protocol family PF_UNSPEC may be used to define fallback 177 * function pointers for the case when no entry for the specific protocol 178 * family exists. 179 * 180 * Returns 0 on success or a negative error code. 181 */ 182int __rtnl_register(int protocol, int msgtype, 183 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 184 rtnl_calcit_func calcit) 185{ 186 struct rtnl_link *tab; 187 int msgindex; 188 189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 190 msgindex = rtm_msgindex(msgtype); 191 192 tab = rtnl_msg_handlers[protocol]; 193 if (tab == NULL) { 194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 195 if (tab == NULL) 196 return -ENOBUFS; 197 198 rtnl_msg_handlers[protocol] = tab; 199 } 200 201 if (doit) 202 tab[msgindex].doit = doit; 203 204 if (dumpit) 205 tab[msgindex].dumpit = dumpit; 206 207 if (calcit) 208 tab[msgindex].calcit = calcit; 209 210 return 0; 211} 212EXPORT_SYMBOL_GPL(__rtnl_register); 213 214/** 215 * rtnl_register - Register a rtnetlink message type 216 * 217 * Identical to __rtnl_register() but panics on failure. This is useful 218 * as failure of this function is very unlikely, it can only happen due 219 * to lack of memory when allocating the chain to store all message 220 * handlers for a protocol. Meant for use in init functions where lack 221 * of memory implies no sense in continuing. 222 */ 223void rtnl_register(int protocol, int msgtype, 224 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 225 rtnl_calcit_func calcit) 226{ 227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 228 panic("Unable to register rtnetlink message handler, " 229 "protocol = %d, message type = %d\n", 230 protocol, msgtype); 231} 232EXPORT_SYMBOL_GPL(rtnl_register); 233 234/** 235 * rtnl_unregister - Unregister a rtnetlink message type 236 * @protocol: Protocol family or PF_UNSPEC 237 * @msgtype: rtnetlink message type 238 * 239 * Returns 0 on success or a negative error code. 240 */ 241int rtnl_unregister(int protocol, int msgtype) 242{ 243 int msgindex; 244 245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 246 msgindex = rtm_msgindex(msgtype); 247 248 if (rtnl_msg_handlers[protocol] == NULL) 249 return -ENOENT; 250 251 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 253 254 return 0; 255} 256EXPORT_SYMBOL_GPL(rtnl_unregister); 257 258/** 259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 260 * @protocol : Protocol family or PF_UNSPEC 261 * 262 * Identical to calling rtnl_unregster() for all registered message types 263 * of a certain protocol family. 264 */ 265void rtnl_unregister_all(int protocol) 266{ 267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 268 269 kfree(rtnl_msg_handlers[protocol]); 270 rtnl_msg_handlers[protocol] = NULL; 271} 272EXPORT_SYMBOL_GPL(rtnl_unregister_all); 273 274static LIST_HEAD(link_ops); 275 276static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 277{ 278 const struct rtnl_link_ops *ops; 279 280 list_for_each_entry(ops, &link_ops, list) { 281 if (!strcmp(ops->kind, kind)) 282 return ops; 283 } 284 return NULL; 285} 286 287/** 288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 289 * @ops: struct rtnl_link_ops * to register 290 * 291 * The caller must hold the rtnl_mutex. This function should be used 292 * by drivers that create devices during module initialization. It 293 * must be called before registering the devices. 294 * 295 * Returns 0 on success or a negative error code. 296 */ 297int __rtnl_link_register(struct rtnl_link_ops *ops) 298{ 299 if (rtnl_link_ops_get(ops->kind)) 300 return -EEXIST; 301 302 if (!ops->dellink) 303 ops->dellink = unregister_netdevice_queue; 304 305 list_add_tail(&ops->list, &link_ops); 306 return 0; 307} 308EXPORT_SYMBOL_GPL(__rtnl_link_register); 309 310/** 311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 312 * @ops: struct rtnl_link_ops * to register 313 * 314 * Returns 0 on success or a negative error code. 315 */ 316int rtnl_link_register(struct rtnl_link_ops *ops) 317{ 318 int err; 319 320 rtnl_lock(); 321 err = __rtnl_link_register(ops); 322 rtnl_unlock(); 323 return err; 324} 325EXPORT_SYMBOL_GPL(rtnl_link_register); 326 327static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 328{ 329 struct net_device *dev; 330 LIST_HEAD(list_kill); 331 332 for_each_netdev(net, dev) { 333 if (dev->rtnl_link_ops == ops) 334 ops->dellink(dev, &list_kill); 335 } 336 unregister_netdevice_many(&list_kill); 337} 338 339/** 340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 341 * @ops: struct rtnl_link_ops * to unregister 342 * 343 * The caller must hold the rtnl_mutex. 344 */ 345void __rtnl_link_unregister(struct rtnl_link_ops *ops) 346{ 347 struct net *net; 348 349 for_each_net(net) { 350 __rtnl_kill_links(net, ops); 351 } 352 list_del(&ops->list); 353} 354EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 355 356/** 357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 358 * @ops: struct rtnl_link_ops * to unregister 359 */ 360void rtnl_link_unregister(struct rtnl_link_ops *ops) 361{ 362 rtnl_lock(); 363 __rtnl_link_unregister(ops); 364 rtnl_unlock(); 365} 366EXPORT_SYMBOL_GPL(rtnl_link_unregister); 367 368static size_t rtnl_link_get_size(const struct net_device *dev) 369{ 370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 371 size_t size; 372 373 if (!ops) 374 return 0; 375 376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 378 379 if (ops->get_size) 380 /* IFLA_INFO_DATA + nested data */ 381 size += nla_total_size(sizeof(struct nlattr)) + 382 ops->get_size(dev); 383 384 if (ops->get_xstats_size) 385 /* IFLA_INFO_XSTATS */ 386 size += nla_total_size(ops->get_xstats_size(dev)); 387 388 return size; 389} 390 391static LIST_HEAD(rtnl_af_ops); 392 393static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 394{ 395 const struct rtnl_af_ops *ops; 396 397 list_for_each_entry(ops, &rtnl_af_ops, list) { 398 if (ops->family == family) 399 return ops; 400 } 401 402 return NULL; 403} 404 405/** 406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink. 407 * @ops: struct rtnl_af_ops * to register 408 * 409 * The caller must hold the rtnl_mutex. 410 * 411 * Returns 0 on success or a negative error code. 412 */ 413int __rtnl_af_register(struct rtnl_af_ops *ops) 414{ 415 list_add_tail(&ops->list, &rtnl_af_ops); 416 return 0; 417} 418EXPORT_SYMBOL_GPL(__rtnl_af_register); 419 420/** 421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 422 * @ops: struct rtnl_af_ops * to register 423 * 424 * Returns 0 on success or a negative error code. 425 */ 426int rtnl_af_register(struct rtnl_af_ops *ops) 427{ 428 int err; 429 430 rtnl_lock(); 431 err = __rtnl_af_register(ops); 432 rtnl_unlock(); 433 return err; 434} 435EXPORT_SYMBOL_GPL(rtnl_af_register); 436 437/** 438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 439 * @ops: struct rtnl_af_ops * to unregister 440 * 441 * The caller must hold the rtnl_mutex. 442 */ 443void __rtnl_af_unregister(struct rtnl_af_ops *ops) 444{ 445 list_del(&ops->list); 446} 447EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 448 449/** 450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 451 * @ops: struct rtnl_af_ops * to unregister 452 */ 453void rtnl_af_unregister(struct rtnl_af_ops *ops) 454{ 455 rtnl_lock(); 456 __rtnl_af_unregister(ops); 457 rtnl_unlock(); 458} 459EXPORT_SYMBOL_GPL(rtnl_af_unregister); 460 461static size_t rtnl_link_get_af_size(const struct net_device *dev) 462{ 463 struct rtnl_af_ops *af_ops; 464 size_t size; 465 466 /* IFLA_AF_SPEC */ 467 size = nla_total_size(sizeof(struct nlattr)); 468 469 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 470 if (af_ops->get_link_af_size) { 471 /* AF_* + nested data */ 472 size += nla_total_size(sizeof(struct nlattr)) + 473 af_ops->get_link_af_size(dev); 474 } 475 } 476 477 return size; 478} 479 480static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 481{ 482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 483 struct nlattr *linkinfo, *data; 484 int err = -EMSGSIZE; 485 486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 487 if (linkinfo == NULL) 488 goto out; 489 490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 491 goto err_cancel_link; 492 if (ops->fill_xstats) { 493 err = ops->fill_xstats(skb, dev); 494 if (err < 0) 495 goto err_cancel_link; 496 } 497 if (ops->fill_info) { 498 data = nla_nest_start(skb, IFLA_INFO_DATA); 499 if (data == NULL) 500 goto err_cancel_link; 501 err = ops->fill_info(skb, dev); 502 if (err < 0) 503 goto err_cancel_data; 504 nla_nest_end(skb, data); 505 } 506 507 nla_nest_end(skb, linkinfo); 508 return 0; 509 510err_cancel_data: 511 nla_nest_cancel(skb, data); 512err_cancel_link: 513 nla_nest_cancel(skb, linkinfo); 514out: 515 return err; 516} 517 518static const int rtm_min[RTM_NR_FAMILIES] = 519{ 520 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), 521 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), 522 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), 523 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), 524 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 525 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 526 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 527 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), 528 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 529 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 530}; 531 532static const int rta_max[RTM_NR_FAMILIES] = 533{ 534 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, 535 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, 536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, 537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, 538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, 539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, 540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, 541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, 542}; 543 544int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 545{ 546 struct sock *rtnl = net->rtnl; 547 int err = 0; 548 549 NETLINK_CB(skb).dst_group = group; 550 if (echo) 551 atomic_inc(&skb->users); 552 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 553 if (echo) 554 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 555 return err; 556} 557 558int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 559{ 560 struct sock *rtnl = net->rtnl; 561 562 return nlmsg_unicast(rtnl, skb, pid); 563} 564EXPORT_SYMBOL(rtnl_unicast); 565 566void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 567 struct nlmsghdr *nlh, gfp_t flags) 568{ 569 struct sock *rtnl = net->rtnl; 570 int report = 0; 571 572 if (nlh) 573 report = nlmsg_report(nlh); 574 575 nlmsg_notify(rtnl, skb, pid, group, report, flags); 576} 577EXPORT_SYMBOL(rtnl_notify); 578 579void rtnl_set_sk_err(struct net *net, u32 group, int error) 580{ 581 struct sock *rtnl = net->rtnl; 582 583 netlink_set_err(rtnl, 0, group, error); 584} 585EXPORT_SYMBOL(rtnl_set_sk_err); 586 587int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 588{ 589 struct nlattr *mx; 590 int i, valid = 0; 591 592 mx = nla_nest_start(skb, RTA_METRICS); 593 if (mx == NULL) 594 return -ENOBUFS; 595 596 for (i = 0; i < RTAX_MAX; i++) { 597 if (metrics[i]) { 598 valid++; 599 if (nla_put_u32(skb, i+1, metrics[i])) 600 goto nla_put_failure; 601 } 602 } 603 604 if (!valid) { 605 nla_nest_cancel(skb, mx); 606 return 0; 607 } 608 609 return nla_nest_end(skb, mx); 610 611nla_put_failure: 612 nla_nest_cancel(skb, mx); 613 return -EMSGSIZE; 614} 615EXPORT_SYMBOL(rtnetlink_put_metrics); 616 617int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 618 long expires, u32 error) 619{ 620 struct rta_cacheinfo ci = { 621 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 622 .rta_used = dst->__use, 623 .rta_clntref = atomic_read(&(dst->__refcnt)), 624 .rta_error = error, 625 .rta_id = id, 626 }; 627 628 if (expires) { 629 unsigned long clock; 630 631 clock = jiffies_to_clock_t(abs(expires)); 632 clock = min_t(unsigned long, clock, INT_MAX); 633 ci.rta_expires = (expires > 0) ? clock : -clock; 634 } 635 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 636} 637EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 638 639static void set_operstate(struct net_device *dev, unsigned char transition) 640{ 641 unsigned char operstate = dev->operstate; 642 643 switch (transition) { 644 case IF_OPER_UP: 645 if ((operstate == IF_OPER_DORMANT || 646 operstate == IF_OPER_UNKNOWN) && 647 !netif_dormant(dev)) 648 operstate = IF_OPER_UP; 649 break; 650 651 case IF_OPER_DORMANT: 652 if (operstate == IF_OPER_UP || 653 operstate == IF_OPER_UNKNOWN) 654 operstate = IF_OPER_DORMANT; 655 break; 656 } 657 658 if (dev->operstate != operstate) { 659 write_lock_bh(&dev_base_lock); 660 dev->operstate = operstate; 661 write_unlock_bh(&dev_base_lock); 662 netdev_state_change(dev); 663 } 664} 665 666static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 667{ 668 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 669 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 670} 671 672static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 673 const struct ifinfomsg *ifm) 674{ 675 unsigned int flags = ifm->ifi_flags; 676 677 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 678 if (ifm->ifi_change) 679 flags = (flags & ifm->ifi_change) | 680 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 681 682 return flags; 683} 684 685static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 686 const struct rtnl_link_stats64 *b) 687{ 688 a->rx_packets = b->rx_packets; 689 a->tx_packets = b->tx_packets; 690 a->rx_bytes = b->rx_bytes; 691 a->tx_bytes = b->tx_bytes; 692 a->rx_errors = b->rx_errors; 693 a->tx_errors = b->tx_errors; 694 a->rx_dropped = b->rx_dropped; 695 a->tx_dropped = b->tx_dropped; 696 697 a->multicast = b->multicast; 698 a->collisions = b->collisions; 699 700 a->rx_length_errors = b->rx_length_errors; 701 a->rx_over_errors = b->rx_over_errors; 702 a->rx_crc_errors = b->rx_crc_errors; 703 a->rx_frame_errors = b->rx_frame_errors; 704 a->rx_fifo_errors = b->rx_fifo_errors; 705 a->rx_missed_errors = b->rx_missed_errors; 706 707 a->tx_aborted_errors = b->tx_aborted_errors; 708 a->tx_carrier_errors = b->tx_carrier_errors; 709 a->tx_fifo_errors = b->tx_fifo_errors; 710 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 711 a->tx_window_errors = b->tx_window_errors; 712 713 a->rx_compressed = b->rx_compressed; 714 a->tx_compressed = b->tx_compressed; 715} 716 717static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) 718{ 719 memcpy(v, b, sizeof(*b)); 720} 721 722/* All VF info */ 723static inline int rtnl_vfinfo_size(const struct net_device *dev, 724 u32 ext_filter_mask) 725{ 726 if (dev->dev.parent && dev_is_pci(dev->dev.parent) && 727 (ext_filter_mask & RTEXT_FILTER_VF)) { 728 int num_vfs = dev_num_vf(dev->dev.parent); 729 size_t size = nla_total_size(sizeof(struct nlattr)); 730 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 731 size += num_vfs * 732 (nla_total_size(sizeof(struct ifla_vf_mac)) + 733 nla_total_size(sizeof(struct ifla_vf_vlan)) + 734 nla_total_size(sizeof(struct ifla_vf_tx_rate)) + 735 nla_total_size(sizeof(struct ifla_vf_spoofchk))); 736 return size; 737 } else 738 return 0; 739} 740 741static size_t rtnl_port_size(const struct net_device *dev) 742{ 743 size_t port_size = nla_total_size(4) /* PORT_VF */ 744 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 745 + nla_total_size(sizeof(struct ifla_port_vsi)) 746 /* PORT_VSI_TYPE */ 747 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 748 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 749 + nla_total_size(1) /* PROT_VDP_REQUEST */ 750 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 751 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 752 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 753 + port_size; 754 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 755 + port_size; 756 757 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) 758 return 0; 759 if (dev_num_vf(dev->dev.parent)) 760 return port_self_size + vf_ports_size + 761 vf_port_size * dev_num_vf(dev->dev.parent); 762 else 763 return port_self_size; 764} 765 766static noinline size_t if_nlmsg_size(const struct net_device *dev, 767 u32 ext_filter_mask) 768{ 769 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 770 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 771 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 772 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 773 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 774 + nla_total_size(sizeof(struct rtnl_link_stats)) 775 + nla_total_size(sizeof(struct rtnl_link_stats64)) 776 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 777 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 778 + nla_total_size(4) /* IFLA_TXQLEN */ 779 + nla_total_size(4) /* IFLA_WEIGHT */ 780 + nla_total_size(4) /* IFLA_MTU */ 781 + nla_total_size(4) /* IFLA_LINK */ 782 + nla_total_size(4) /* IFLA_MASTER */ 783 + nla_total_size(1) /* IFLA_CARRIER */ 784 + nla_total_size(4) /* IFLA_PROMISCUITY */ 785 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 786 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 787 + nla_total_size(1) /* IFLA_OPERSTATE */ 788 + nla_total_size(1) /* IFLA_LINKMODE */ 789 + nla_total_size(ext_filter_mask 790 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 791 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 792 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 793 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 794 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */ 795} 796 797static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 798{ 799 struct nlattr *vf_ports; 800 struct nlattr *vf_port; 801 int vf; 802 int err; 803 804 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 805 if (!vf_ports) 806 return -EMSGSIZE; 807 808 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 809 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 810 if (!vf_port) 811 goto nla_put_failure; 812 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 813 goto nla_put_failure; 814 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 815 if (err == -EMSGSIZE) 816 goto nla_put_failure; 817 if (err) { 818 nla_nest_cancel(skb, vf_port); 819 continue; 820 } 821 nla_nest_end(skb, vf_port); 822 } 823 824 nla_nest_end(skb, vf_ports); 825 826 return 0; 827 828nla_put_failure: 829 nla_nest_cancel(skb, vf_ports); 830 return -EMSGSIZE; 831} 832 833static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 834{ 835 struct nlattr *port_self; 836 int err; 837 838 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 839 if (!port_self) 840 return -EMSGSIZE; 841 842 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 843 if (err) { 844 nla_nest_cancel(skb, port_self); 845 return (err == -EMSGSIZE) ? err : 0; 846 } 847 848 nla_nest_end(skb, port_self); 849 850 return 0; 851} 852 853static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev) 854{ 855 int err; 856 857 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) 858 return 0; 859 860 err = rtnl_port_self_fill(skb, dev); 861 if (err) 862 return err; 863 864 if (dev_num_vf(dev->dev.parent)) { 865 err = rtnl_vf_ports_fill(skb, dev); 866 if (err) 867 return err; 868 } 869 870 return 0; 871} 872 873static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 874 int type, u32 pid, u32 seq, u32 change, 875 unsigned int flags, u32 ext_filter_mask) 876{ 877 struct ifinfomsg *ifm; 878 struct nlmsghdr *nlh; 879 struct rtnl_link_stats64 temp; 880 const struct rtnl_link_stats64 *stats; 881 struct nlattr *attr, *af_spec; 882 struct rtnl_af_ops *af_ops; 883 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 884 885 ASSERT_RTNL(); 886 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 887 if (nlh == NULL) 888 return -EMSGSIZE; 889 890 ifm = nlmsg_data(nlh); 891 ifm->ifi_family = AF_UNSPEC; 892 ifm->__ifi_pad = 0; 893 ifm->ifi_type = dev->type; 894 ifm->ifi_index = dev->ifindex; 895 ifm->ifi_flags = dev_get_flags(dev); 896 ifm->ifi_change = change; 897 898 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 899 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 900 nla_put_u8(skb, IFLA_OPERSTATE, 901 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 902 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 903 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 904 nla_put_u32(skb, IFLA_GROUP, dev->group) || 905 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 906 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 907#ifdef CONFIG_RPS 908 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 909#endif 910 (dev->ifindex != dev->iflink && 911 nla_put_u32(skb, IFLA_LINK, dev->iflink)) || 912 (upper_dev && 913 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 914 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 915 (dev->qdisc && 916 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 917 (dev->ifalias && 918 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias))) 919 goto nla_put_failure; 920 921 if (1) { 922 struct rtnl_link_ifmap map = { 923 .mem_start = dev->mem_start, 924 .mem_end = dev->mem_end, 925 .base_addr = dev->base_addr, 926 .irq = dev->irq, 927 .dma = dev->dma, 928 .port = dev->if_port, 929 }; 930 if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) 931 goto nla_put_failure; 932 } 933 934 if (dev->addr_len) { 935 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 936 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 937 goto nla_put_failure; 938 } 939 940 attr = nla_reserve(skb, IFLA_STATS, 941 sizeof(struct rtnl_link_stats)); 942 if (attr == NULL) 943 goto nla_put_failure; 944 945 stats = dev_get_stats(dev, &temp); 946 copy_rtnl_link_stats(nla_data(attr), stats); 947 948 attr = nla_reserve(skb, IFLA_STATS64, 949 sizeof(struct rtnl_link_stats64)); 950 if (attr == NULL) 951 goto nla_put_failure; 952 copy_rtnl_link_stats64(nla_data(attr), stats); 953 954 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 955 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 956 goto nla_put_failure; 957 958 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent 959 && (ext_filter_mask & RTEXT_FILTER_VF)) { 960 int i; 961 962 struct nlattr *vfinfo, *vf; 963 int num_vfs = dev_num_vf(dev->dev.parent); 964 965 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 966 if (!vfinfo) 967 goto nla_put_failure; 968 for (i = 0; i < num_vfs; i++) { 969 struct ifla_vf_info ivi; 970 struct ifla_vf_mac vf_mac; 971 struct ifla_vf_vlan vf_vlan; 972 struct ifla_vf_tx_rate vf_tx_rate; 973 struct ifla_vf_spoofchk vf_spoofchk; 974 975 /* 976 * Not all SR-IOV capable drivers support the 977 * spoofcheck query. Preset to -1 so the user 978 * space tool can detect that the driver didn't 979 * report anything. 980 */ 981 ivi.spoofchk = -1; 982 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) 983 break; 984 vf_mac.vf = 985 vf_vlan.vf = 986 vf_tx_rate.vf = 987 vf_spoofchk.vf = ivi.vf; 988 989 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 990 vf_vlan.vlan = ivi.vlan; 991 vf_vlan.qos = ivi.qos; 992 vf_tx_rate.rate = ivi.tx_rate; 993 vf_spoofchk.setting = ivi.spoofchk; 994 vf = nla_nest_start(skb, IFLA_VF_INFO); 995 if (!vf) { 996 nla_nest_cancel(skb, vfinfo); 997 goto nla_put_failure; 998 } 999 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1000 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1001 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1002 &vf_tx_rate) || 1003 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1004 &vf_spoofchk)) 1005 goto nla_put_failure; 1006 nla_nest_end(skb, vf); 1007 } 1008 nla_nest_end(skb, vfinfo); 1009 } 1010 1011 if (rtnl_port_fill(skb, dev)) 1012 goto nla_put_failure; 1013 1014 if (dev->rtnl_link_ops) { 1015 if (rtnl_link_fill(skb, dev) < 0) 1016 goto nla_put_failure; 1017 } 1018 1019 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1020 goto nla_put_failure; 1021 1022 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1023 if (af_ops->fill_link_af) { 1024 struct nlattr *af; 1025 int err; 1026 1027 if (!(af = nla_nest_start(skb, af_ops->family))) 1028 goto nla_put_failure; 1029 1030 err = af_ops->fill_link_af(skb, dev); 1031 1032 /* 1033 * Caller may return ENODATA to indicate that there 1034 * was no data to be dumped. This is not an error, it 1035 * means we should trim the attribute header and 1036 * continue. 1037 */ 1038 if (err == -ENODATA) 1039 nla_nest_cancel(skb, af); 1040 else if (err < 0) 1041 goto nla_put_failure; 1042 1043 nla_nest_end(skb, af); 1044 } 1045 } 1046 1047 nla_nest_end(skb, af_spec); 1048 1049 return nlmsg_end(skb, nlh); 1050 1051nla_put_failure: 1052 nlmsg_cancel(skb, nlh); 1053 return -EMSGSIZE; 1054} 1055 1056static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1057{ 1058 struct net *net = sock_net(skb->sk); 1059 int h, s_h; 1060 int idx = 0, s_idx; 1061 struct net_device *dev; 1062 struct hlist_head *head; 1063 struct hlist_node *node; 1064 struct nlattr *tb[IFLA_MAX+1]; 1065 u32 ext_filter_mask = 0; 1066 1067 s_h = cb->args[0]; 1068 s_idx = cb->args[1]; 1069 1070 rcu_read_lock(); 1071 cb->seq = net->dev_base_seq; 1072 1073 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX, 1074 ifla_policy) >= 0) { 1075 1076 if (tb[IFLA_EXT_MASK]) 1077 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1078 } 1079 1080 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1081 idx = 0; 1082 head = &net->dev_index_head[h]; 1083 hlist_for_each_entry_rcu(dev, node, head, index_hlist) { 1084 if (idx < s_idx) 1085 goto cont; 1086 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1087 NETLINK_CB(cb->skb).portid, 1088 cb->nlh->nlmsg_seq, 0, 1089 NLM_F_MULTI, 1090 ext_filter_mask) <= 0) 1091 goto out; 1092 1093 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1094cont: 1095 idx++; 1096 } 1097 } 1098out: 1099 rcu_read_unlock(); 1100 cb->args[1] = idx; 1101 cb->args[0] = h; 1102 1103 return skb->len; 1104} 1105 1106const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1107 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1108 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1109 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1110 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1111 [IFLA_MTU] = { .type = NLA_U32 }, 1112 [IFLA_LINK] = { .type = NLA_U32 }, 1113 [IFLA_MASTER] = { .type = NLA_U32 }, 1114 [IFLA_CARRIER] = { .type = NLA_U8 }, 1115 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1116 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1117 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1118 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1119 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1120 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1121 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1122 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1123 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1124 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1125 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1126 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1127 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1128 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1129 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1130 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1131}; 1132EXPORT_SYMBOL(ifla_policy); 1133 1134static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1135 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1136 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1137}; 1138 1139static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { 1140 [IFLA_VF_INFO] = { .type = NLA_NESTED }, 1141}; 1142 1143static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1144 [IFLA_VF_MAC] = { .type = NLA_BINARY, 1145 .len = sizeof(struct ifla_vf_mac) }, 1146 [IFLA_VF_VLAN] = { .type = NLA_BINARY, 1147 .len = sizeof(struct ifla_vf_vlan) }, 1148 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, 1149 .len = sizeof(struct ifla_vf_tx_rate) }, 1150 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY, 1151 .len = sizeof(struct ifla_vf_spoofchk) }, 1152}; 1153 1154static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1155 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1156 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1157 .len = PORT_PROFILE_MAX }, 1158 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1159 .len = sizeof(struct ifla_port_vsi)}, 1160 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1161 .len = PORT_UUID_MAX }, 1162 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1163 .len = PORT_UUID_MAX }, 1164 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1165 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1166}; 1167 1168struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1169{ 1170 struct net *net; 1171 /* Examine the link attributes and figure out which 1172 * network namespace we are talking about. 1173 */ 1174 if (tb[IFLA_NET_NS_PID]) 1175 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1176 else if (tb[IFLA_NET_NS_FD]) 1177 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1178 else 1179 net = get_net(src_net); 1180 return net; 1181} 1182EXPORT_SYMBOL(rtnl_link_get_net); 1183 1184static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1185{ 1186 if (dev) { 1187 if (tb[IFLA_ADDRESS] && 1188 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1189 return -EINVAL; 1190 1191 if (tb[IFLA_BROADCAST] && 1192 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1193 return -EINVAL; 1194 } 1195 1196 if (tb[IFLA_AF_SPEC]) { 1197 struct nlattr *af; 1198 int rem, err; 1199 1200 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1201 const struct rtnl_af_ops *af_ops; 1202 1203 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1204 return -EAFNOSUPPORT; 1205 1206 if (!af_ops->set_link_af) 1207 return -EOPNOTSUPP; 1208 1209 if (af_ops->validate_link_af) { 1210 err = af_ops->validate_link_af(dev, af); 1211 if (err < 0) 1212 return err; 1213 } 1214 } 1215 } 1216 1217 return 0; 1218} 1219 1220static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) 1221{ 1222 int rem, err = -EINVAL; 1223 struct nlattr *vf; 1224 const struct net_device_ops *ops = dev->netdev_ops; 1225 1226 nla_for_each_nested(vf, attr, rem) { 1227 switch (nla_type(vf)) { 1228 case IFLA_VF_MAC: { 1229 struct ifla_vf_mac *ivm; 1230 ivm = nla_data(vf); 1231 err = -EOPNOTSUPP; 1232 if (ops->ndo_set_vf_mac) 1233 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1234 ivm->mac); 1235 break; 1236 } 1237 case IFLA_VF_VLAN: { 1238 struct ifla_vf_vlan *ivv; 1239 ivv = nla_data(vf); 1240 err = -EOPNOTSUPP; 1241 if (ops->ndo_set_vf_vlan) 1242 err = ops->ndo_set_vf_vlan(dev, ivv->vf, 1243 ivv->vlan, 1244 ivv->qos); 1245 break; 1246 } 1247 case IFLA_VF_TX_RATE: { 1248 struct ifla_vf_tx_rate *ivt; 1249 ivt = nla_data(vf); 1250 err = -EOPNOTSUPP; 1251 if (ops->ndo_set_vf_tx_rate) 1252 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, 1253 ivt->rate); 1254 break; 1255 } 1256 case IFLA_VF_SPOOFCHK: { 1257 struct ifla_vf_spoofchk *ivs; 1258 ivs = nla_data(vf); 1259 err = -EOPNOTSUPP; 1260 if (ops->ndo_set_vf_spoofchk) 1261 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1262 ivs->setting); 1263 break; 1264 } 1265 default: 1266 err = -EINVAL; 1267 break; 1268 } 1269 if (err) 1270 break; 1271 } 1272 return err; 1273} 1274 1275static int do_set_master(struct net_device *dev, int ifindex) 1276{ 1277 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1278 const struct net_device_ops *ops; 1279 int err; 1280 1281 if (upper_dev) { 1282 if (upper_dev->ifindex == ifindex) 1283 return 0; 1284 ops = upper_dev->netdev_ops; 1285 if (ops->ndo_del_slave) { 1286 err = ops->ndo_del_slave(upper_dev, dev); 1287 if (err) 1288 return err; 1289 } else { 1290 return -EOPNOTSUPP; 1291 } 1292 } 1293 1294 if (ifindex) { 1295 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1296 if (!upper_dev) 1297 return -EINVAL; 1298 ops = upper_dev->netdev_ops; 1299 if (ops->ndo_add_slave) { 1300 err = ops->ndo_add_slave(upper_dev, dev); 1301 if (err) 1302 return err; 1303 } else { 1304 return -EOPNOTSUPP; 1305 } 1306 } 1307 return 0; 1308} 1309 1310static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, 1311 struct nlattr **tb, char *ifname, int modified) 1312{ 1313 const struct net_device_ops *ops = dev->netdev_ops; 1314 int err; 1315 1316 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1317 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1318 if (IS_ERR(net)) { 1319 err = PTR_ERR(net); 1320 goto errout; 1321 } 1322 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) { 1323 err = -EPERM; 1324 goto errout; 1325 } 1326 err = dev_change_net_namespace(dev, net, ifname); 1327 put_net(net); 1328 if (err) 1329 goto errout; 1330 modified = 1; 1331 } 1332 1333 if (tb[IFLA_MAP]) { 1334 struct rtnl_link_ifmap *u_map; 1335 struct ifmap k_map; 1336 1337 if (!ops->ndo_set_config) { 1338 err = -EOPNOTSUPP; 1339 goto errout; 1340 } 1341 1342 if (!netif_device_present(dev)) { 1343 err = -ENODEV; 1344 goto errout; 1345 } 1346 1347 u_map = nla_data(tb[IFLA_MAP]); 1348 k_map.mem_start = (unsigned long) u_map->mem_start; 1349 k_map.mem_end = (unsigned long) u_map->mem_end; 1350 k_map.base_addr = (unsigned short) u_map->base_addr; 1351 k_map.irq = (unsigned char) u_map->irq; 1352 k_map.dma = (unsigned char) u_map->dma; 1353 k_map.port = (unsigned char) u_map->port; 1354 1355 err = ops->ndo_set_config(dev, &k_map); 1356 if (err < 0) 1357 goto errout; 1358 1359 modified = 1; 1360 } 1361 1362 if (tb[IFLA_ADDRESS]) { 1363 struct sockaddr *sa; 1364 int len; 1365 1366 len = sizeof(sa_family_t) + dev->addr_len; 1367 sa = kmalloc(len, GFP_KERNEL); 1368 if (!sa) { 1369 err = -ENOMEM; 1370 goto errout; 1371 } 1372 sa->sa_family = dev->type; 1373 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1374 dev->addr_len); 1375 err = dev_set_mac_address(dev, sa); 1376 kfree(sa); 1377 if (err) 1378 goto errout; 1379 modified = 1; 1380 } 1381 1382 if (tb[IFLA_MTU]) { 1383 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1384 if (err < 0) 1385 goto errout; 1386 modified = 1; 1387 } 1388 1389 if (tb[IFLA_GROUP]) { 1390 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1391 modified = 1; 1392 } 1393 1394 /* 1395 * Interface selected by interface index but interface 1396 * name provided implies that a name change has been 1397 * requested. 1398 */ 1399 if (ifm->ifi_index > 0 && ifname[0]) { 1400 err = dev_change_name(dev, ifname); 1401 if (err < 0) 1402 goto errout; 1403 modified = 1; 1404 } 1405 1406 if (tb[IFLA_IFALIAS]) { 1407 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1408 nla_len(tb[IFLA_IFALIAS])); 1409 if (err < 0) 1410 goto errout; 1411 modified = 1; 1412 } 1413 1414 if (tb[IFLA_BROADCAST]) { 1415 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1416 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1417 } 1418 1419 if (ifm->ifi_flags || ifm->ifi_change) { 1420 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1421 if (err < 0) 1422 goto errout; 1423 } 1424 1425 if (tb[IFLA_MASTER]) { 1426 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1427 if (err) 1428 goto errout; 1429 modified = 1; 1430 } 1431 1432 if (tb[IFLA_CARRIER]) { 1433 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 1434 if (err) 1435 goto errout; 1436 modified = 1; 1437 } 1438 1439 if (tb[IFLA_TXQLEN]) 1440 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1441 1442 if (tb[IFLA_OPERSTATE]) 1443 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1444 1445 if (tb[IFLA_LINKMODE]) { 1446 write_lock_bh(&dev_base_lock); 1447 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1448 write_unlock_bh(&dev_base_lock); 1449 } 1450 1451 if (tb[IFLA_VFINFO_LIST]) { 1452 struct nlattr *attr; 1453 int rem; 1454 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1455 if (nla_type(attr) != IFLA_VF_INFO) { 1456 err = -EINVAL; 1457 goto errout; 1458 } 1459 err = do_setvfinfo(dev, attr); 1460 if (err < 0) 1461 goto errout; 1462 modified = 1; 1463 } 1464 } 1465 err = 0; 1466 1467 if (tb[IFLA_VF_PORTS]) { 1468 struct nlattr *port[IFLA_PORT_MAX+1]; 1469 struct nlattr *attr; 1470 int vf; 1471 int rem; 1472 1473 err = -EOPNOTSUPP; 1474 if (!ops->ndo_set_vf_port) 1475 goto errout; 1476 1477 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1478 if (nla_type(attr) != IFLA_VF_PORT) 1479 continue; 1480 err = nla_parse_nested(port, IFLA_PORT_MAX, 1481 attr, ifla_port_policy); 1482 if (err < 0) 1483 goto errout; 1484 if (!port[IFLA_PORT_VF]) { 1485 err = -EOPNOTSUPP; 1486 goto errout; 1487 } 1488 vf = nla_get_u32(port[IFLA_PORT_VF]); 1489 err = ops->ndo_set_vf_port(dev, vf, port); 1490 if (err < 0) 1491 goto errout; 1492 modified = 1; 1493 } 1494 } 1495 err = 0; 1496 1497 if (tb[IFLA_PORT_SELF]) { 1498 struct nlattr *port[IFLA_PORT_MAX+1]; 1499 1500 err = nla_parse_nested(port, IFLA_PORT_MAX, 1501 tb[IFLA_PORT_SELF], ifla_port_policy); 1502 if (err < 0) 1503 goto errout; 1504 1505 err = -EOPNOTSUPP; 1506 if (ops->ndo_set_vf_port) 1507 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1508 if (err < 0) 1509 goto errout; 1510 modified = 1; 1511 } 1512 1513 if (tb[IFLA_AF_SPEC]) { 1514 struct nlattr *af; 1515 int rem; 1516 1517 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1518 const struct rtnl_af_ops *af_ops; 1519 1520 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1521 BUG(); 1522 1523 err = af_ops->set_link_af(dev, af); 1524 if (err < 0) 1525 goto errout; 1526 1527 modified = 1; 1528 } 1529 } 1530 err = 0; 1531 1532errout: 1533 if (err < 0 && modified) 1534 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", 1535 dev->name); 1536 1537 return err; 1538} 1539 1540static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1541{ 1542 struct net *net = sock_net(skb->sk); 1543 struct ifinfomsg *ifm; 1544 struct net_device *dev; 1545 int err; 1546 struct nlattr *tb[IFLA_MAX+1]; 1547 char ifname[IFNAMSIZ]; 1548 1549 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1550 if (err < 0) 1551 goto errout; 1552 1553 if (tb[IFLA_IFNAME]) 1554 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1555 else 1556 ifname[0] = '\0'; 1557 1558 err = -EINVAL; 1559 ifm = nlmsg_data(nlh); 1560 if (ifm->ifi_index > 0) 1561 dev = __dev_get_by_index(net, ifm->ifi_index); 1562 else if (tb[IFLA_IFNAME]) 1563 dev = __dev_get_by_name(net, ifname); 1564 else 1565 goto errout; 1566 1567 if (dev == NULL) { 1568 err = -ENODEV; 1569 goto errout; 1570 } 1571 1572 err = validate_linkmsg(dev, tb); 1573 if (err < 0) 1574 goto errout; 1575 1576 err = do_setlink(dev, ifm, tb, ifname, 0); 1577errout: 1578 return err; 1579} 1580 1581static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1582{ 1583 struct net *net = sock_net(skb->sk); 1584 const struct rtnl_link_ops *ops; 1585 struct net_device *dev; 1586 struct ifinfomsg *ifm; 1587 char ifname[IFNAMSIZ]; 1588 struct nlattr *tb[IFLA_MAX+1]; 1589 int err; 1590 LIST_HEAD(list_kill); 1591 1592 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1593 if (err < 0) 1594 return err; 1595 1596 if (tb[IFLA_IFNAME]) 1597 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1598 1599 ifm = nlmsg_data(nlh); 1600 if (ifm->ifi_index > 0) 1601 dev = __dev_get_by_index(net, ifm->ifi_index); 1602 else if (tb[IFLA_IFNAME]) 1603 dev = __dev_get_by_name(net, ifname); 1604 else 1605 return -EINVAL; 1606 1607 if (!dev) 1608 return -ENODEV; 1609 1610 ops = dev->rtnl_link_ops; 1611 if (!ops) 1612 return -EOPNOTSUPP; 1613 1614 ops->dellink(dev, &list_kill); 1615 unregister_netdevice_many(&list_kill); 1616 list_del(&list_kill); 1617 return 0; 1618} 1619 1620int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 1621{ 1622 unsigned int old_flags; 1623 int err; 1624 1625 old_flags = dev->flags; 1626 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 1627 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1628 if (err < 0) 1629 return err; 1630 } 1631 1632 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 1633 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); 1634 1635 __dev_notify_flags(dev, old_flags); 1636 return 0; 1637} 1638EXPORT_SYMBOL(rtnl_configure_link); 1639 1640struct net_device *rtnl_create_link(struct net *net, 1641 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]) 1642{ 1643 int err; 1644 struct net_device *dev; 1645 unsigned int num_tx_queues = 1; 1646 unsigned int num_rx_queues = 1; 1647 1648 if (tb[IFLA_NUM_TX_QUEUES]) 1649 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 1650 else if (ops->get_num_tx_queues) 1651 num_tx_queues = ops->get_num_tx_queues(); 1652 1653 if (tb[IFLA_NUM_RX_QUEUES]) 1654 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 1655 else if (ops->get_num_rx_queues) 1656 num_rx_queues = ops->get_num_rx_queues(); 1657 1658 err = -ENOMEM; 1659 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup, 1660 num_tx_queues, num_rx_queues); 1661 if (!dev) 1662 goto err; 1663 1664 dev_net_set(dev, net); 1665 dev->rtnl_link_ops = ops; 1666 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 1667 1668 if (tb[IFLA_MTU]) 1669 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1670 if (tb[IFLA_ADDRESS]) 1671 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1672 nla_len(tb[IFLA_ADDRESS])); 1673 if (tb[IFLA_BROADCAST]) 1674 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1675 nla_len(tb[IFLA_BROADCAST])); 1676 if (tb[IFLA_TXQLEN]) 1677 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1678 if (tb[IFLA_OPERSTATE]) 1679 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1680 if (tb[IFLA_LINKMODE]) 1681 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1682 if (tb[IFLA_GROUP]) 1683 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1684 1685 return dev; 1686 1687err: 1688 return ERR_PTR(err); 1689} 1690EXPORT_SYMBOL(rtnl_create_link); 1691 1692static int rtnl_group_changelink(struct net *net, int group, 1693 struct ifinfomsg *ifm, 1694 struct nlattr **tb) 1695{ 1696 struct net_device *dev; 1697 int err; 1698 1699 for_each_netdev(net, dev) { 1700 if (dev->group == group) { 1701 err = do_setlink(dev, ifm, tb, NULL, 0); 1702 if (err < 0) 1703 return err; 1704 } 1705 } 1706 1707 return 0; 1708} 1709 1710static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1711{ 1712 struct net *net = sock_net(skb->sk); 1713 const struct rtnl_link_ops *ops; 1714 struct net_device *dev; 1715 struct ifinfomsg *ifm; 1716 char kind[MODULE_NAME_LEN]; 1717 char ifname[IFNAMSIZ]; 1718 struct nlattr *tb[IFLA_MAX+1]; 1719 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 1720 int err; 1721 1722#ifdef CONFIG_MODULES 1723replay: 1724#endif 1725 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1726 if (err < 0) 1727 return err; 1728 1729 if (tb[IFLA_IFNAME]) 1730 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1731 else 1732 ifname[0] = '\0'; 1733 1734 ifm = nlmsg_data(nlh); 1735 if (ifm->ifi_index > 0) 1736 dev = __dev_get_by_index(net, ifm->ifi_index); 1737 else { 1738 if (ifname[0]) 1739 dev = __dev_get_by_name(net, ifname); 1740 else 1741 dev = NULL; 1742 } 1743 1744 err = validate_linkmsg(dev, tb); 1745 if (err < 0) 1746 return err; 1747 1748 if (tb[IFLA_LINKINFO]) { 1749 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 1750 tb[IFLA_LINKINFO], ifla_info_policy); 1751 if (err < 0) 1752 return err; 1753 } else 1754 memset(linkinfo, 0, sizeof(linkinfo)); 1755 1756 if (linkinfo[IFLA_INFO_KIND]) { 1757 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 1758 ops = rtnl_link_ops_get(kind); 1759 } else { 1760 kind[0] = '\0'; 1761 ops = NULL; 1762 } 1763 1764 if (1) { 1765 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; 1766 struct net *dest_net; 1767 1768 if (ops) { 1769 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 1770 err = nla_parse_nested(attr, ops->maxtype, 1771 linkinfo[IFLA_INFO_DATA], 1772 ops->policy); 1773 if (err < 0) 1774 return err; 1775 data = attr; 1776 } 1777 if (ops->validate) { 1778 err = ops->validate(tb, data); 1779 if (err < 0) 1780 return err; 1781 } 1782 } 1783 1784 if (dev) { 1785 int modified = 0; 1786 1787 if (nlh->nlmsg_flags & NLM_F_EXCL) 1788 return -EEXIST; 1789 if (nlh->nlmsg_flags & NLM_F_REPLACE) 1790 return -EOPNOTSUPP; 1791 1792 if (linkinfo[IFLA_INFO_DATA]) { 1793 if (!ops || ops != dev->rtnl_link_ops || 1794 !ops->changelink) 1795 return -EOPNOTSUPP; 1796 1797 err = ops->changelink(dev, tb, data); 1798 if (err < 0) 1799 return err; 1800 modified = 1; 1801 } 1802 1803 return do_setlink(dev, ifm, tb, ifname, modified); 1804 } 1805 1806 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 1807 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 1808 return rtnl_group_changelink(net, 1809 nla_get_u32(tb[IFLA_GROUP]), 1810 ifm, tb); 1811 return -ENODEV; 1812 } 1813 1814 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 1815 return -EOPNOTSUPP; 1816 1817 if (!ops) { 1818#ifdef CONFIG_MODULES 1819 if (kind[0]) { 1820 __rtnl_unlock(); 1821 request_module("rtnl-link-%s", kind); 1822 rtnl_lock(); 1823 ops = rtnl_link_ops_get(kind); 1824 if (ops) 1825 goto replay; 1826 } 1827#endif 1828 return -EOPNOTSUPP; 1829 } 1830 1831 if (!ifname[0]) 1832 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 1833 1834 dest_net = rtnl_link_get_net(net, tb); 1835 if (IS_ERR(dest_net)) 1836 return PTR_ERR(dest_net); 1837 1838 dev = rtnl_create_link(dest_net, ifname, ops, tb); 1839 if (IS_ERR(dev)) { 1840 err = PTR_ERR(dev); 1841 goto out; 1842 } 1843 1844 dev->ifindex = ifm->ifi_index; 1845 1846 if (ops->newlink) 1847 err = ops->newlink(net, dev, tb, data); 1848 else 1849 err = register_netdevice(dev); 1850 1851 if (err < 0 && !IS_ERR(dev)) 1852 free_netdev(dev); 1853 if (err < 0) 1854 goto out; 1855 1856 err = rtnl_configure_link(dev, ifm); 1857 if (err < 0) 1858 unregister_netdevice(dev); 1859out: 1860 put_net(dest_net); 1861 return err; 1862 } 1863} 1864 1865static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) 1866{ 1867 struct net *net = sock_net(skb->sk); 1868 struct ifinfomsg *ifm; 1869 char ifname[IFNAMSIZ]; 1870 struct nlattr *tb[IFLA_MAX+1]; 1871 struct net_device *dev = NULL; 1872 struct sk_buff *nskb; 1873 int err; 1874 u32 ext_filter_mask = 0; 1875 1876 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1877 if (err < 0) 1878 return err; 1879 1880 if (tb[IFLA_IFNAME]) 1881 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1882 1883 if (tb[IFLA_EXT_MASK]) 1884 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1885 1886 ifm = nlmsg_data(nlh); 1887 if (ifm->ifi_index > 0) 1888 dev = __dev_get_by_index(net, ifm->ifi_index); 1889 else if (tb[IFLA_IFNAME]) 1890 dev = __dev_get_by_name(net, ifname); 1891 else 1892 return -EINVAL; 1893 1894 if (dev == NULL) 1895 return -ENODEV; 1896 1897 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 1898 if (nskb == NULL) 1899 return -ENOBUFS; 1900 1901 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 1902 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 1903 if (err < 0) { 1904 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 1905 WARN_ON(err == -EMSGSIZE); 1906 kfree_skb(nskb); 1907 } else 1908 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 1909 1910 return err; 1911} 1912 1913static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 1914{ 1915 struct net *net = sock_net(skb->sk); 1916 struct net_device *dev; 1917 struct nlattr *tb[IFLA_MAX+1]; 1918 u32 ext_filter_mask = 0; 1919 u16 min_ifinfo_dump_size = 0; 1920 1921 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX, 1922 ifla_policy) >= 0) { 1923 if (tb[IFLA_EXT_MASK]) 1924 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1925 } 1926 1927 if (!ext_filter_mask) 1928 return NLMSG_GOODSIZE; 1929 /* 1930 * traverse the list of net devices and compute the minimum 1931 * buffer size based upon the filter mask. 1932 */ 1933 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 1934 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 1935 if_nlmsg_size(dev, 1936 ext_filter_mask)); 1937 } 1938 1939 return min_ifinfo_dump_size; 1940} 1941 1942static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 1943{ 1944 int idx; 1945 int s_idx = cb->family; 1946 1947 if (s_idx == 0) 1948 s_idx = 1; 1949 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 1950 int type = cb->nlh->nlmsg_type-RTM_BASE; 1951 if (idx < s_idx || idx == PF_PACKET) 1952 continue; 1953 if (rtnl_msg_handlers[idx] == NULL || 1954 rtnl_msg_handlers[idx][type].dumpit == NULL) 1955 continue; 1956 if (idx > s_idx) 1957 memset(&cb->args[0], 0, sizeof(cb->args)); 1958 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 1959 break; 1960 } 1961 cb->family = idx; 1962 1963 return skb->len; 1964} 1965 1966void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change) 1967{ 1968 struct net *net = dev_net(dev); 1969 struct sk_buff *skb; 1970 int err = -ENOBUFS; 1971 size_t if_info_size; 1972 1973 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL); 1974 if (skb == NULL) 1975 goto errout; 1976 1977 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 1978 if (err < 0) { 1979 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 1980 WARN_ON(err == -EMSGSIZE); 1981 kfree_skb(skb); 1982 goto errout; 1983 } 1984 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); 1985 return; 1986errout: 1987 if (err < 0) 1988 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 1989} 1990 1991static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 1992 struct net_device *dev, 1993 u8 *addr, u32 pid, u32 seq, 1994 int type, unsigned int flags) 1995{ 1996 struct nlmsghdr *nlh; 1997 struct ndmsg *ndm; 1998 1999 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI); 2000 if (!nlh) 2001 return -EMSGSIZE; 2002 2003 ndm = nlmsg_data(nlh); 2004 ndm->ndm_family = AF_BRIDGE; 2005 ndm->ndm_pad1 = 0; 2006 ndm->ndm_pad2 = 0; 2007 ndm->ndm_flags = flags; 2008 ndm->ndm_type = 0; 2009 ndm->ndm_ifindex = dev->ifindex; 2010 ndm->ndm_state = NUD_PERMANENT; 2011 2012 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2013 goto nla_put_failure; 2014 2015 return nlmsg_end(skb, nlh); 2016 2017nla_put_failure: 2018 nlmsg_cancel(skb, nlh); 2019 return -EMSGSIZE; 2020} 2021 2022static inline size_t rtnl_fdb_nlmsg_size(void) 2023{ 2024 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2025} 2026 2027static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type) 2028{ 2029 struct net *net = dev_net(dev); 2030 struct sk_buff *skb; 2031 int err = -ENOBUFS; 2032 2033 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2034 if (!skb) 2035 goto errout; 2036 2037 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF); 2038 if (err < 0) { 2039 kfree_skb(skb); 2040 goto errout; 2041 } 2042 2043 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2044 return; 2045errout: 2046 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2047} 2048 2049static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 2050{ 2051 struct net *net = sock_net(skb->sk); 2052 struct ndmsg *ndm; 2053 struct nlattr *tb[NDA_MAX+1]; 2054 struct net_device *dev; 2055 u8 *addr; 2056 int err; 2057 2058 if (!capable(CAP_NET_ADMIN)) 2059 return -EPERM; 2060 2061 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2062 if (err < 0) 2063 return err; 2064 2065 ndm = nlmsg_data(nlh); 2066 if (ndm->ndm_ifindex == 0) { 2067 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2068 return -EINVAL; 2069 } 2070 2071 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2072 if (dev == NULL) { 2073 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2074 return -ENODEV; 2075 } 2076 2077 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2078 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2079 return -EINVAL; 2080 } 2081 2082 addr = nla_data(tb[NDA_LLADDR]); 2083 if (!is_valid_ether_addr(addr)) { 2084 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n"); 2085 return -EINVAL; 2086 } 2087 2088 err = -EOPNOTSUPP; 2089 2090 /* Support fdb on master device the net/bridge default case */ 2091 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2092 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2093 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2094 const struct net_device_ops *ops = br_dev->netdev_ops; 2095 2096 err = ops->ndo_fdb_add(ndm, tb, dev, addr, nlh->nlmsg_flags); 2097 if (err) 2098 goto out; 2099 else 2100 ndm->ndm_flags &= ~NTF_MASTER; 2101 } 2102 2103 /* Embedded bridge, macvlan, and any other device support */ 2104 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) { 2105 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, 2106 dev, addr, 2107 nlh->nlmsg_flags); 2108 2109 if (!err) { 2110 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH); 2111 ndm->ndm_flags &= ~NTF_SELF; 2112 } 2113 } 2114out: 2115 return err; 2116} 2117 2118static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 2119{ 2120 struct net *net = sock_net(skb->sk); 2121 struct ndmsg *ndm; 2122 struct nlattr *llattr; 2123 struct net_device *dev; 2124 int err = -EINVAL; 2125 __u8 *addr; 2126 2127 if (!capable(CAP_NET_ADMIN)) 2128 return -EPERM; 2129 2130 if (nlmsg_len(nlh) < sizeof(*ndm)) 2131 return -EINVAL; 2132 2133 ndm = nlmsg_data(nlh); 2134 if (ndm->ndm_ifindex == 0) { 2135 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2136 return -EINVAL; 2137 } 2138 2139 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2140 if (dev == NULL) { 2141 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2142 return -ENODEV; 2143 } 2144 2145 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR); 2146 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) { 2147 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n"); 2148 return -EINVAL; 2149 } 2150 2151 addr = nla_data(llattr); 2152 err = -EOPNOTSUPP; 2153 2154 /* Support fdb on master device the net/bridge default case */ 2155 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2156 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2157 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2158 const struct net_device_ops *ops = br_dev->netdev_ops; 2159 2160 if (ops->ndo_fdb_del) 2161 err = ops->ndo_fdb_del(ndm, dev, addr); 2162 2163 if (err) 2164 goto out; 2165 else 2166 ndm->ndm_flags &= ~NTF_MASTER; 2167 } 2168 2169 /* Embedded bridge, macvlan, and any other device support */ 2170 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) { 2171 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr); 2172 2173 if (!err) { 2174 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH); 2175 ndm->ndm_flags &= ~NTF_SELF; 2176 } 2177 } 2178out: 2179 return err; 2180} 2181 2182static int nlmsg_populate_fdb(struct sk_buff *skb, 2183 struct netlink_callback *cb, 2184 struct net_device *dev, 2185 int *idx, 2186 struct netdev_hw_addr_list *list) 2187{ 2188 struct netdev_hw_addr *ha; 2189 int err; 2190 u32 portid, seq; 2191 2192 portid = NETLINK_CB(cb->skb).portid; 2193 seq = cb->nlh->nlmsg_seq; 2194 2195 list_for_each_entry(ha, &list->list, list) { 2196 if (*idx < cb->args[0]) 2197 goto skip; 2198 2199 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 2200 portid, seq, 2201 RTM_NEWNEIGH, NTF_SELF); 2202 if (err < 0) 2203 return err; 2204skip: 2205 *idx += 1; 2206 } 2207 return 0; 2208} 2209 2210/** 2211 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2212 * @nlh: netlink message header 2213 * @dev: netdevice 2214 * 2215 * Default netdevice operation to dump the existing unicast address list. 2216 * Returns zero on success. 2217 */ 2218int ndo_dflt_fdb_dump(struct sk_buff *skb, 2219 struct netlink_callback *cb, 2220 struct net_device *dev, 2221 int idx) 2222{ 2223 int err; 2224 2225 netif_addr_lock_bh(dev); 2226 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 2227 if (err) 2228 goto out; 2229 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 2230out: 2231 netif_addr_unlock_bh(dev); 2232 return idx; 2233} 2234EXPORT_SYMBOL(ndo_dflt_fdb_dump); 2235 2236static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 2237{ 2238 int idx = 0; 2239 struct net *net = sock_net(skb->sk); 2240 struct net_device *dev; 2241 2242 rcu_read_lock(); 2243 for_each_netdev_rcu(net, dev) { 2244 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2245 struct net_device *br_dev; 2246 const struct net_device_ops *ops; 2247 2248 br_dev = netdev_master_upper_dev_get(dev); 2249 ops = br_dev->netdev_ops; 2250 if (ops->ndo_fdb_dump) 2251 idx = ops->ndo_fdb_dump(skb, cb, dev, idx); 2252 } 2253 2254 if (dev->netdev_ops->ndo_fdb_dump) 2255 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx); 2256 } 2257 rcu_read_unlock(); 2258 2259 cb->args[0] = idx; 2260 return skb->len; 2261} 2262 2263int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 2264 struct net_device *dev, u16 mode) 2265{ 2266 struct nlmsghdr *nlh; 2267 struct ifinfomsg *ifm; 2268 struct nlattr *br_afspec; 2269 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 2270 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2271 2272 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI); 2273 if (nlh == NULL) 2274 return -EMSGSIZE; 2275 2276 ifm = nlmsg_data(nlh); 2277 ifm->ifi_family = AF_BRIDGE; 2278 ifm->__ifi_pad = 0; 2279 ifm->ifi_type = dev->type; 2280 ifm->ifi_index = dev->ifindex; 2281 ifm->ifi_flags = dev_get_flags(dev); 2282 ifm->ifi_change = 0; 2283 2284 2285 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 2286 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 2287 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 2288 (br_dev && 2289 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 2290 (dev->addr_len && 2291 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 2292 (dev->ifindex != dev->iflink && 2293 nla_put_u32(skb, IFLA_LINK, dev->iflink))) 2294 goto nla_put_failure; 2295 2296 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 2297 if (!br_afspec) 2298 goto nla_put_failure; 2299 2300 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) || 2301 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 2302 nla_nest_cancel(skb, br_afspec); 2303 goto nla_put_failure; 2304 } 2305 nla_nest_end(skb, br_afspec); 2306 2307 return nlmsg_end(skb, nlh); 2308nla_put_failure: 2309 nlmsg_cancel(skb, nlh); 2310 return -EMSGSIZE; 2311} 2312EXPORT_SYMBOL(ndo_dflt_bridge_getlink); 2313 2314static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 2315{ 2316 struct net *net = sock_net(skb->sk); 2317 struct net_device *dev; 2318 int idx = 0; 2319 u32 portid = NETLINK_CB(cb->skb).portid; 2320 u32 seq = cb->nlh->nlmsg_seq; 2321 2322 rcu_read_lock(); 2323 for_each_netdev_rcu(net, dev) { 2324 const struct net_device_ops *ops = dev->netdev_ops; 2325 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2326 2327 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 2328 if (idx >= cb->args[0] && 2329 br_dev->netdev_ops->ndo_bridge_getlink( 2330 skb, portid, seq, dev) < 0) 2331 break; 2332 idx++; 2333 } 2334 2335 if (ops->ndo_bridge_getlink) { 2336 if (idx >= cb->args[0] && 2337 ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0) 2338 break; 2339 idx++; 2340 } 2341 } 2342 rcu_read_unlock(); 2343 cb->args[0] = idx; 2344 2345 return skb->len; 2346} 2347 2348static inline size_t bridge_nlmsg_size(void) 2349{ 2350 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 2351 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 2352 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 2353 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 2354 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 2355 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 2356 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 2357 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 2358 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 2359 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 2360 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 2361} 2362 2363static int rtnl_bridge_notify(struct net_device *dev, u16 flags) 2364{ 2365 struct net *net = dev_net(dev); 2366 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2367 struct sk_buff *skb; 2368 int err = -EOPNOTSUPP; 2369 2370 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 2371 if (!skb) { 2372 err = -ENOMEM; 2373 goto errout; 2374 } 2375 2376 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) && 2377 br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 2378 err = br_dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev); 2379 if (err < 0) 2380 goto errout; 2381 } 2382 2383 if ((flags & BRIDGE_FLAGS_SELF) && 2384 dev->netdev_ops->ndo_bridge_getlink) { 2385 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev); 2386 if (err < 0) 2387 goto errout; 2388 } 2389 2390 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 2391 return 0; 2392errout: 2393 WARN_ON(err == -EMSGSIZE); 2394 kfree_skb(skb); 2395 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2396 return err; 2397} 2398 2399static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2400 void *arg) 2401{ 2402 struct net *net = sock_net(skb->sk); 2403 struct ifinfomsg *ifm; 2404 struct net_device *dev; 2405 struct nlattr *br_spec, *attr = NULL; 2406 int rem, err = -EOPNOTSUPP; 2407 u16 oflags, flags = 0; 2408 bool have_flags = false; 2409 2410 if (nlmsg_len(nlh) < sizeof(*ifm)) 2411 return -EINVAL; 2412 2413 ifm = nlmsg_data(nlh); 2414 if (ifm->ifi_family != AF_BRIDGE) 2415 return -EPFNOSUPPORT; 2416 2417 dev = __dev_get_by_index(net, ifm->ifi_index); 2418 if (!dev) { 2419 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 2420 return -ENODEV; 2421 } 2422 2423 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 2424 if (br_spec) { 2425 nla_for_each_nested(attr, br_spec, rem) { 2426 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 2427 have_flags = true; 2428 flags = nla_get_u16(attr); 2429 break; 2430 } 2431 } 2432 } 2433 2434 oflags = flags; 2435 2436 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 2437 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2438 2439 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 2440 err = -EOPNOTSUPP; 2441 goto out; 2442 } 2443 2444 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh); 2445 if (err) 2446 goto out; 2447 2448 flags &= ~BRIDGE_FLAGS_MASTER; 2449 } 2450 2451 if ((flags & BRIDGE_FLAGS_SELF)) { 2452 if (!dev->netdev_ops->ndo_bridge_setlink) 2453 err = -EOPNOTSUPP; 2454 else 2455 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh); 2456 2457 if (!err) 2458 flags &= ~BRIDGE_FLAGS_SELF; 2459 } 2460 2461 if (have_flags) 2462 memcpy(nla_data(attr), &flags, sizeof(flags)); 2463 /* Generate event to notify upper layer of bridge change */ 2464 if (!err) 2465 err = rtnl_bridge_notify(dev, oflags); 2466out: 2467 return err; 2468} 2469 2470/* Protected by RTNL sempahore. */ 2471static struct rtattr **rta_buf; 2472static int rtattr_max; 2473 2474/* Process one rtnetlink message. */ 2475 2476static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 2477{ 2478 struct net *net = sock_net(skb->sk); 2479 rtnl_doit_func doit; 2480 int sz_idx, kind; 2481 int min_len; 2482 int family; 2483 int type; 2484 int err; 2485 2486 type = nlh->nlmsg_type; 2487 if (type > RTM_MAX) 2488 return -EOPNOTSUPP; 2489 2490 type -= RTM_BASE; 2491 2492 /* All the messages must have at least 1 byte length */ 2493 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) 2494 return 0; 2495 2496 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family; 2497 sz_idx = type>>2; 2498 kind = type&3; 2499 2500 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN)) 2501 return -EPERM; 2502 2503 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 2504 struct sock *rtnl; 2505 rtnl_dumpit_func dumpit; 2506 rtnl_calcit_func calcit; 2507 u16 min_dump_alloc = 0; 2508 2509 dumpit = rtnl_get_dumpit(family, type); 2510 if (dumpit == NULL) 2511 return -EOPNOTSUPP; 2512 calcit = rtnl_get_calcit(family, type); 2513 if (calcit) 2514 min_dump_alloc = calcit(skb, nlh); 2515 2516 __rtnl_unlock(); 2517 rtnl = net->rtnl; 2518 { 2519 struct netlink_dump_control c = { 2520 .dump = dumpit, 2521 .min_dump_alloc = min_dump_alloc, 2522 }; 2523 err = netlink_dump_start(rtnl, skb, nlh, &c); 2524 } 2525 rtnl_lock(); 2526 return err; 2527 } 2528 2529 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); 2530 2531 min_len = rtm_min[sz_idx]; 2532 if (nlh->nlmsg_len < min_len) 2533 return -EINVAL; 2534 2535 if (nlh->nlmsg_len > min_len) { 2536 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 2537 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len); 2538 2539 while (RTA_OK(attr, attrlen)) { 2540 unsigned int flavor = attr->rta_type; 2541 if (flavor) { 2542 if (flavor > rta_max[sz_idx]) 2543 return -EINVAL; 2544 rta_buf[flavor-1] = attr; 2545 } 2546 attr = RTA_NEXT(attr, attrlen); 2547 } 2548 } 2549 2550 doit = rtnl_get_doit(family, type); 2551 if (doit == NULL) 2552 return -EOPNOTSUPP; 2553 2554 return doit(skb, nlh, (void *)&rta_buf[0]); 2555} 2556 2557static void rtnetlink_rcv(struct sk_buff *skb) 2558{ 2559 rtnl_lock(); 2560 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 2561 rtnl_unlock(); 2562} 2563 2564static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 2565{ 2566 struct net_device *dev = ptr; 2567 2568 switch (event) { 2569 case NETDEV_UP: 2570 case NETDEV_DOWN: 2571 case NETDEV_PRE_UP: 2572 case NETDEV_POST_INIT: 2573 case NETDEV_REGISTER: 2574 case NETDEV_CHANGE: 2575 case NETDEV_PRE_TYPE_CHANGE: 2576 case NETDEV_GOING_DOWN: 2577 case NETDEV_UNREGISTER: 2578 case NETDEV_UNREGISTER_FINAL: 2579 case NETDEV_RELEASE: 2580 case NETDEV_JOIN: 2581 break; 2582 default: 2583 rtmsg_ifinfo(RTM_NEWLINK, dev, 0); 2584 break; 2585 } 2586 return NOTIFY_DONE; 2587} 2588 2589static struct notifier_block rtnetlink_dev_notifier = { 2590 .notifier_call = rtnetlink_event, 2591}; 2592 2593 2594static int __net_init rtnetlink_net_init(struct net *net) 2595{ 2596 struct sock *sk; 2597 struct netlink_kernel_cfg cfg = { 2598 .groups = RTNLGRP_MAX, 2599 .input = rtnetlink_rcv, 2600 .cb_mutex = &rtnl_mutex, 2601 .flags = NL_CFG_F_NONROOT_RECV, 2602 }; 2603 2604 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 2605 if (!sk) 2606 return -ENOMEM; 2607 net->rtnl = sk; 2608 return 0; 2609} 2610 2611static void __net_exit rtnetlink_net_exit(struct net *net) 2612{ 2613 netlink_kernel_release(net->rtnl); 2614 net->rtnl = NULL; 2615} 2616 2617static struct pernet_operations rtnetlink_net_ops = { 2618 .init = rtnetlink_net_init, 2619 .exit = rtnetlink_net_exit, 2620}; 2621 2622void __init rtnetlink_init(void) 2623{ 2624 int i; 2625 2626 rtattr_max = 0; 2627 for (i = 0; i < ARRAY_SIZE(rta_max); i++) 2628 if (rta_max[i] > rtattr_max) 2629 rtattr_max = rta_max[i]; 2630 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); 2631 if (!rta_buf) 2632 panic("rtnetlink_init: cannot allocate rta_buf\n"); 2633 2634 if (register_pernet_subsys(&rtnetlink_net_ops)) 2635 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 2636 2637 register_netdevice_notifier(&rtnetlink_dev_notifier); 2638 2639 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 2640 rtnl_dump_ifinfo, rtnl_calcit); 2641 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 2642 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 2643 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 2644 2645 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 2646 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 2647 2648 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 2649 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 2650 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 2651 2652 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 2653 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 2654} 2655 2656