rtnetlink.c revision e71992889ee289a87f6641cfa40d64a5699bcb53
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 39#include <asm/uaccess.h> 40#include <asm/system.h> 41#include <asm/string.h> 42 43#include <linux/inet.h> 44#include <linux/netdevice.h> 45#include <net/ip.h> 46#include <net/protocol.h> 47#include <net/arp.h> 48#include <net/route.h> 49#include <net/udp.h> 50#include <net/sock.h> 51#include <net/pkt_sched.h> 52#include <net/fib_rules.h> 53#include <net/rtnetlink.h> 54 55struct rtnl_link 56{ 57 rtnl_doit_func doit; 58 rtnl_dumpit_func dumpit; 59}; 60 61static DEFINE_MUTEX(rtnl_mutex); 62static struct sock *rtnl; 63 64void rtnl_lock(void) 65{ 66 mutex_lock(&rtnl_mutex); 67} 68 69void __rtnl_unlock(void) 70{ 71 mutex_unlock(&rtnl_mutex); 72} 73 74void rtnl_unlock(void) 75{ 76 mutex_unlock(&rtnl_mutex); 77 if (rtnl && rtnl->sk_receive_queue.qlen) 78 rtnl->sk_data_ready(rtnl, 0); 79 netdev_run_todo(); 80} 81 82int rtnl_trylock(void) 83{ 84 return mutex_trylock(&rtnl_mutex); 85} 86 87int rtattr_parse(struct rtattr *tb[], int maxattr, struct rtattr *rta, int len) 88{ 89 memset(tb, 0, sizeof(struct rtattr*)*maxattr); 90 91 while (RTA_OK(rta, len)) { 92 unsigned flavor = rta->rta_type; 93 if (flavor && flavor <= maxattr) 94 tb[flavor-1] = rta; 95 rta = RTA_NEXT(rta, len); 96 } 97 return 0; 98} 99 100int __rtattr_parse_nested_compat(struct rtattr *tb[], int maxattr, 101 struct rtattr *rta, int len) 102{ 103 if (RTA_PAYLOAD(rta) < len) 104 return -1; 105 if (RTA_PAYLOAD(rta) >= RTA_ALIGN(len) + sizeof(struct rtattr)) { 106 rta = RTA_DATA(rta) + RTA_ALIGN(len); 107 return rtattr_parse_nested(tb, maxattr, rta); 108 } 109 memset(tb, 0, sizeof(struct rtattr *) * maxattr); 110 return 0; 111} 112 113static struct rtnl_link *rtnl_msg_handlers[NPROTO]; 114 115static inline int rtm_msgindex(int msgtype) 116{ 117 int msgindex = msgtype - RTM_BASE; 118 119 /* 120 * msgindex < 0 implies someone tried to register a netlink 121 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 122 * the message type has not been added to linux/rtnetlink.h 123 */ 124 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 125 126 return msgindex; 127} 128 129static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 130{ 131 struct rtnl_link *tab; 132 133 tab = rtnl_msg_handlers[protocol]; 134 if (tab == NULL || tab[msgindex].doit == NULL) 135 tab = rtnl_msg_handlers[PF_UNSPEC]; 136 137 return tab ? tab[msgindex].doit : NULL; 138} 139 140static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 141{ 142 struct rtnl_link *tab; 143 144 tab = rtnl_msg_handlers[protocol]; 145 if (tab == NULL || tab[msgindex].dumpit == NULL) 146 tab = rtnl_msg_handlers[PF_UNSPEC]; 147 148 return tab ? tab[msgindex].dumpit : NULL; 149} 150 151/** 152 * __rtnl_register - Register a rtnetlink message type 153 * @protocol: Protocol family or PF_UNSPEC 154 * @msgtype: rtnetlink message type 155 * @doit: Function pointer called for each request message 156 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 157 * 158 * Registers the specified function pointers (at least one of them has 159 * to be non-NULL) to be called whenever a request message for the 160 * specified protocol family and message type is received. 161 * 162 * The special protocol family PF_UNSPEC may be used to define fallback 163 * function pointers for the case when no entry for the specific protocol 164 * family exists. 165 * 166 * Returns 0 on success or a negative error code. 167 */ 168int __rtnl_register(int protocol, int msgtype, 169 rtnl_doit_func doit, rtnl_dumpit_func dumpit) 170{ 171 struct rtnl_link *tab; 172 int msgindex; 173 174 BUG_ON(protocol < 0 || protocol >= NPROTO); 175 msgindex = rtm_msgindex(msgtype); 176 177 tab = rtnl_msg_handlers[protocol]; 178 if (tab == NULL) { 179 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 180 if (tab == NULL) 181 return -ENOBUFS; 182 183 rtnl_msg_handlers[protocol] = tab; 184 } 185 186 if (doit) 187 tab[msgindex].doit = doit; 188 189 if (dumpit) 190 tab[msgindex].dumpit = dumpit; 191 192 return 0; 193} 194 195EXPORT_SYMBOL_GPL(__rtnl_register); 196 197/** 198 * rtnl_register - Register a rtnetlink message type 199 * 200 * Identical to __rtnl_register() but panics on failure. This is useful 201 * as failure of this function is very unlikely, it can only happen due 202 * to lack of memory when allocating the chain to store all message 203 * handlers for a protocol. Meant for use in init functions where lack 204 * of memory implies no sense in continueing. 205 */ 206void rtnl_register(int protocol, int msgtype, 207 rtnl_doit_func doit, rtnl_dumpit_func dumpit) 208{ 209 if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0) 210 panic("Unable to register rtnetlink message handler, " 211 "protocol = %d, message type = %d\n", 212 protocol, msgtype); 213} 214 215EXPORT_SYMBOL_GPL(rtnl_register); 216 217/** 218 * rtnl_unregister - Unregister a rtnetlink message type 219 * @protocol: Protocol family or PF_UNSPEC 220 * @msgtype: rtnetlink message type 221 * 222 * Returns 0 on success or a negative error code. 223 */ 224int rtnl_unregister(int protocol, int msgtype) 225{ 226 int msgindex; 227 228 BUG_ON(protocol < 0 || protocol >= NPROTO); 229 msgindex = rtm_msgindex(msgtype); 230 231 if (rtnl_msg_handlers[protocol] == NULL) 232 return -ENOENT; 233 234 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 235 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 236 237 return 0; 238} 239 240EXPORT_SYMBOL_GPL(rtnl_unregister); 241 242/** 243 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 244 * @protocol : Protocol family or PF_UNSPEC 245 * 246 * Identical to calling rtnl_unregster() for all registered message types 247 * of a certain protocol family. 248 */ 249void rtnl_unregister_all(int protocol) 250{ 251 BUG_ON(protocol < 0 || protocol >= NPROTO); 252 253 kfree(rtnl_msg_handlers[protocol]); 254 rtnl_msg_handlers[protocol] = NULL; 255} 256 257EXPORT_SYMBOL_GPL(rtnl_unregister_all); 258 259static LIST_HEAD(link_ops); 260 261/** 262 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 263 * @ops: struct rtnl_link_ops * to register 264 * 265 * The caller must hold the rtnl_mutex. This function should be used 266 * by drivers that create devices during module initialization. It 267 * must be called before registering the devices. 268 * 269 * Returns 0 on success or a negative error code. 270 */ 271int __rtnl_link_register(struct rtnl_link_ops *ops) 272{ 273 if (!ops->dellink) 274 ops->dellink = unregister_netdevice; 275 276 list_add_tail(&ops->list, &link_ops); 277 return 0; 278} 279 280EXPORT_SYMBOL_GPL(__rtnl_link_register); 281 282/** 283 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 284 * @ops: struct rtnl_link_ops * to register 285 * 286 * Returns 0 on success or a negative error code. 287 */ 288int rtnl_link_register(struct rtnl_link_ops *ops) 289{ 290 int err; 291 292 rtnl_lock(); 293 err = __rtnl_link_register(ops); 294 rtnl_unlock(); 295 return err; 296} 297 298EXPORT_SYMBOL_GPL(rtnl_link_register); 299 300/** 301 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 302 * @ops: struct rtnl_link_ops * to unregister 303 * 304 * The caller must hold the rtnl_mutex. 305 */ 306void __rtnl_link_unregister(struct rtnl_link_ops *ops) 307{ 308 struct net_device *dev, *n; 309 310 for_each_netdev_safe(dev, n) { 311 if (dev->rtnl_link_ops == ops) 312 ops->dellink(dev); 313 } 314 list_del(&ops->list); 315} 316 317EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 318 319/** 320 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 321 * @ops: struct rtnl_link_ops * to unregister 322 */ 323void rtnl_link_unregister(struct rtnl_link_ops *ops) 324{ 325 rtnl_lock(); 326 __rtnl_link_unregister(ops); 327 rtnl_unlock(); 328} 329 330EXPORT_SYMBOL_GPL(rtnl_link_unregister); 331 332static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 333{ 334 const struct rtnl_link_ops *ops; 335 336 list_for_each_entry(ops, &link_ops, list) { 337 if (!strcmp(ops->kind, kind)) 338 return ops; 339 } 340 return NULL; 341} 342 343static size_t rtnl_link_get_size(const struct net_device *dev) 344{ 345 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 346 size_t size; 347 348 if (!ops) 349 return 0; 350 351 size = nlmsg_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 352 nlmsg_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 353 354 if (ops->get_size) 355 /* IFLA_INFO_DATA + nested data */ 356 size += nlmsg_total_size(sizeof(struct nlattr)) + 357 ops->get_size(dev); 358 359 if (ops->get_xstats_size) 360 size += ops->get_xstats_size(dev); /* IFLA_INFO_XSTATS */ 361 362 return size; 363} 364 365static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 366{ 367 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 368 struct nlattr *linkinfo, *data; 369 int err = -EMSGSIZE; 370 371 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 372 if (linkinfo == NULL) 373 goto out; 374 375 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 376 goto err_cancel_link; 377 if (ops->fill_xstats) { 378 err = ops->fill_xstats(skb, dev); 379 if (err < 0) 380 goto err_cancel_link; 381 } 382 if (ops->fill_info) { 383 data = nla_nest_start(skb, IFLA_INFO_DATA); 384 if (data == NULL) 385 goto err_cancel_link; 386 err = ops->fill_info(skb, dev); 387 if (err < 0) 388 goto err_cancel_data; 389 nla_nest_end(skb, data); 390 } 391 392 nla_nest_end(skb, linkinfo); 393 return 0; 394 395err_cancel_data: 396 nla_nest_cancel(skb, data); 397err_cancel_link: 398 nla_nest_cancel(skb, linkinfo); 399out: 400 return err; 401} 402 403static const int rtm_min[RTM_NR_FAMILIES] = 404{ 405 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), 406 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), 407 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), 408 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), 409 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 410 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 411 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 412 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), 413 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 414 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 415}; 416 417static const int rta_max[RTM_NR_FAMILIES] = 418{ 419 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, 420 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, 421 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, 422 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, 423 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, 424 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, 425 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, 426 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, 427}; 428 429void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) 430{ 431 struct rtattr *rta; 432 int size = RTA_LENGTH(attrlen); 433 434 rta = (struct rtattr*)skb_put(skb, RTA_ALIGN(size)); 435 rta->rta_type = attrtype; 436 rta->rta_len = size; 437 memcpy(RTA_DATA(rta), data, attrlen); 438 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 439} 440 441size_t rtattr_strlcpy(char *dest, const struct rtattr *rta, size_t size) 442{ 443 size_t ret = RTA_PAYLOAD(rta); 444 char *src = RTA_DATA(rta); 445 446 if (ret > 0 && src[ret - 1] == '\0') 447 ret--; 448 if (size > 0) { 449 size_t len = (ret >= size) ? size - 1 : ret; 450 memset(dest, 0, size); 451 memcpy(dest, src, len); 452 } 453 return ret; 454} 455 456int rtnetlink_send(struct sk_buff *skb, u32 pid, unsigned group, int echo) 457{ 458 int err = 0; 459 460 NETLINK_CB(skb).dst_group = group; 461 if (echo) 462 atomic_inc(&skb->users); 463 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 464 if (echo) 465 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 466 return err; 467} 468 469int rtnl_unicast(struct sk_buff *skb, u32 pid) 470{ 471 return nlmsg_unicast(rtnl, skb, pid); 472} 473 474int rtnl_notify(struct sk_buff *skb, u32 pid, u32 group, 475 struct nlmsghdr *nlh, gfp_t flags) 476{ 477 int report = 0; 478 479 if (nlh) 480 report = nlmsg_report(nlh); 481 482 return nlmsg_notify(rtnl, skb, pid, group, report, flags); 483} 484 485void rtnl_set_sk_err(u32 group, int error) 486{ 487 netlink_set_err(rtnl, 0, group, error); 488} 489 490int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 491{ 492 struct nlattr *mx; 493 int i, valid = 0; 494 495 mx = nla_nest_start(skb, RTA_METRICS); 496 if (mx == NULL) 497 return -ENOBUFS; 498 499 for (i = 0; i < RTAX_MAX; i++) { 500 if (metrics[i]) { 501 valid++; 502 NLA_PUT_U32(skb, i+1, metrics[i]); 503 } 504 } 505 506 if (!valid) { 507 nla_nest_cancel(skb, mx); 508 return 0; 509 } 510 511 return nla_nest_end(skb, mx); 512 513nla_put_failure: 514 return nla_nest_cancel(skb, mx); 515} 516 517int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 518 u32 ts, u32 tsage, long expires, u32 error) 519{ 520 struct rta_cacheinfo ci = { 521 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse), 522 .rta_used = dst->__use, 523 .rta_clntref = atomic_read(&(dst->__refcnt)), 524 .rta_error = error, 525 .rta_id = id, 526 .rta_ts = ts, 527 .rta_tsage = tsage, 528 }; 529 530 if (expires) 531 ci.rta_expires = jiffies_to_clock_t(expires); 532 533 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 534} 535 536EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 537 538static void set_operstate(struct net_device *dev, unsigned char transition) 539{ 540 unsigned char operstate = dev->operstate; 541 542 switch(transition) { 543 case IF_OPER_UP: 544 if ((operstate == IF_OPER_DORMANT || 545 operstate == IF_OPER_UNKNOWN) && 546 !netif_dormant(dev)) 547 operstate = IF_OPER_UP; 548 break; 549 550 case IF_OPER_DORMANT: 551 if (operstate == IF_OPER_UP || 552 operstate == IF_OPER_UNKNOWN) 553 operstate = IF_OPER_DORMANT; 554 break; 555 } 556 557 if (dev->operstate != operstate) { 558 write_lock_bh(&dev_base_lock); 559 dev->operstate = operstate; 560 write_unlock_bh(&dev_base_lock); 561 netdev_state_change(dev); 562 } 563} 564 565static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 566 struct net_device_stats *b) 567{ 568 a->rx_packets = b->rx_packets; 569 a->tx_packets = b->tx_packets; 570 a->rx_bytes = b->rx_bytes; 571 a->tx_bytes = b->tx_bytes; 572 a->rx_errors = b->rx_errors; 573 a->tx_errors = b->tx_errors; 574 a->rx_dropped = b->rx_dropped; 575 a->tx_dropped = b->tx_dropped; 576 577 a->multicast = b->multicast; 578 a->collisions = b->collisions; 579 580 a->rx_length_errors = b->rx_length_errors; 581 a->rx_over_errors = b->rx_over_errors; 582 a->rx_crc_errors = b->rx_crc_errors; 583 a->rx_frame_errors = b->rx_frame_errors; 584 a->rx_fifo_errors = b->rx_fifo_errors; 585 a->rx_missed_errors = b->rx_missed_errors; 586 587 a->tx_aborted_errors = b->tx_aborted_errors; 588 a->tx_carrier_errors = b->tx_carrier_errors; 589 a->tx_fifo_errors = b->tx_fifo_errors; 590 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 591 a->tx_window_errors = b->tx_window_errors; 592 593 a->rx_compressed = b->rx_compressed; 594 a->tx_compressed = b->tx_compressed; 595}; 596 597static inline size_t if_nlmsg_size(const struct net_device *dev) 598{ 599 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 600 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 601 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 602 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 603 + nla_total_size(sizeof(struct rtnl_link_stats)) 604 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 605 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 606 + nla_total_size(4) /* IFLA_TXQLEN */ 607 + nla_total_size(4) /* IFLA_WEIGHT */ 608 + nla_total_size(4) /* IFLA_MTU */ 609 + nla_total_size(4) /* IFLA_LINK */ 610 + nla_total_size(4) /* IFLA_MASTER */ 611 + nla_total_size(1) /* IFLA_OPERSTATE */ 612 + nla_total_size(1) /* IFLA_LINKMODE */ 613 + rtnl_link_get_size(dev); /* IFLA_LINKINFO */ 614} 615 616static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 617 int type, u32 pid, u32 seq, u32 change, 618 unsigned int flags) 619{ 620 struct ifinfomsg *ifm; 621 struct nlmsghdr *nlh; 622 623 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 624 if (nlh == NULL) 625 return -EMSGSIZE; 626 627 ifm = nlmsg_data(nlh); 628 ifm->ifi_family = AF_UNSPEC; 629 ifm->__ifi_pad = 0; 630 ifm->ifi_type = dev->type; 631 ifm->ifi_index = dev->ifindex; 632 ifm->ifi_flags = dev_get_flags(dev); 633 ifm->ifi_change = change; 634 635 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); 636 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len); 637 NLA_PUT_U8(skb, IFLA_OPERSTATE, 638 netif_running(dev) ? dev->operstate : IF_OPER_DOWN); 639 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); 640 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); 641 642 if (dev->ifindex != dev->iflink) 643 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); 644 645 if (dev->master) 646 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); 647 648 if (dev->qdisc_sleeping) 649 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id); 650 651 if (1) { 652 struct rtnl_link_ifmap map = { 653 .mem_start = dev->mem_start, 654 .mem_end = dev->mem_end, 655 .base_addr = dev->base_addr, 656 .irq = dev->irq, 657 .dma = dev->dma, 658 .port = dev->if_port, 659 }; 660 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); 661 } 662 663 if (dev->addr_len) { 664 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); 665 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); 666 } 667 668 if (dev->get_stats) { 669 struct net_device_stats *stats = dev->get_stats(dev); 670 if (stats) { 671 struct nlattr *attr; 672 673 attr = nla_reserve(skb, IFLA_STATS, 674 sizeof(struct rtnl_link_stats)); 675 if (attr == NULL) 676 goto nla_put_failure; 677 678 copy_rtnl_link_stats(nla_data(attr), stats); 679 } 680 } 681 682 if (dev->rtnl_link_ops) { 683 if (rtnl_link_fill(skb, dev) < 0) 684 goto nla_put_failure; 685 } 686 687 return nlmsg_end(skb, nlh); 688 689nla_put_failure: 690 nlmsg_cancel(skb, nlh); 691 return -EMSGSIZE; 692} 693 694static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 695{ 696 int idx; 697 int s_idx = cb->args[0]; 698 struct net_device *dev; 699 700 idx = 0; 701 for_each_netdev(dev) { 702 if (idx < s_idx) 703 goto cont; 704 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 705 NETLINK_CB(cb->skb).pid, 706 cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0) 707 break; 708cont: 709 idx++; 710 } 711 cb->args[0] = idx; 712 713 return skb->len; 714} 715 716const struct nla_policy ifla_policy[IFLA_MAX+1] = { 717 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 718 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 719 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 720 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 721 [IFLA_MTU] = { .type = NLA_U32 }, 722 [IFLA_TXQLEN] = { .type = NLA_U32 }, 723 [IFLA_WEIGHT] = { .type = NLA_U32 }, 724 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 725 [IFLA_LINKMODE] = { .type = NLA_U8 }, 726}; 727 728static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 729 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 730 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 731}; 732 733static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, 734 struct nlattr **tb, char *ifname, int modified) 735{ 736 int send_addr_notify = 0; 737 int err; 738 739 if (tb[IFLA_MAP]) { 740 struct rtnl_link_ifmap *u_map; 741 struct ifmap k_map; 742 743 if (!dev->set_config) { 744 err = -EOPNOTSUPP; 745 goto errout; 746 } 747 748 if (!netif_device_present(dev)) { 749 err = -ENODEV; 750 goto errout; 751 } 752 753 u_map = nla_data(tb[IFLA_MAP]); 754 k_map.mem_start = (unsigned long) u_map->mem_start; 755 k_map.mem_end = (unsigned long) u_map->mem_end; 756 k_map.base_addr = (unsigned short) u_map->base_addr; 757 k_map.irq = (unsigned char) u_map->irq; 758 k_map.dma = (unsigned char) u_map->dma; 759 k_map.port = (unsigned char) u_map->port; 760 761 err = dev->set_config(dev, &k_map); 762 if (err < 0) 763 goto errout; 764 765 modified = 1; 766 } 767 768 if (tb[IFLA_ADDRESS]) { 769 struct sockaddr *sa; 770 int len; 771 772 if (!dev->set_mac_address) { 773 err = -EOPNOTSUPP; 774 goto errout; 775 } 776 777 if (!netif_device_present(dev)) { 778 err = -ENODEV; 779 goto errout; 780 } 781 782 len = sizeof(sa_family_t) + dev->addr_len; 783 sa = kmalloc(len, GFP_KERNEL); 784 if (!sa) { 785 err = -ENOMEM; 786 goto errout; 787 } 788 sa->sa_family = dev->type; 789 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 790 dev->addr_len); 791 err = dev->set_mac_address(dev, sa); 792 kfree(sa); 793 if (err) 794 goto errout; 795 send_addr_notify = 1; 796 modified = 1; 797 } 798 799 if (tb[IFLA_MTU]) { 800 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 801 if (err < 0) 802 goto errout; 803 modified = 1; 804 } 805 806 /* 807 * Interface selected by interface index but interface 808 * name provided implies that a name change has been 809 * requested. 810 */ 811 if (ifm->ifi_index > 0 && ifname[0]) { 812 err = dev_change_name(dev, ifname); 813 if (err < 0) 814 goto errout; 815 modified = 1; 816 } 817 818 if (tb[IFLA_BROADCAST]) { 819 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 820 send_addr_notify = 1; 821 } 822 823 if (ifm->ifi_flags || ifm->ifi_change) { 824 unsigned int flags = ifm->ifi_flags; 825 826 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 827 if (ifm->ifi_change) 828 flags = (flags & ifm->ifi_change) | 829 (dev->flags & ~ifm->ifi_change); 830 dev_change_flags(dev, flags); 831 } 832 833 if (tb[IFLA_TXQLEN]) 834 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 835 836 if (tb[IFLA_OPERSTATE]) 837 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 838 839 if (tb[IFLA_LINKMODE]) { 840 write_lock_bh(&dev_base_lock); 841 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 842 write_unlock_bh(&dev_base_lock); 843 } 844 845 err = 0; 846 847errout: 848 if (err < 0 && modified && net_ratelimit()) 849 printk(KERN_WARNING "A link change request failed with " 850 "some changes comitted already. Interface %s may " 851 "have been left with an inconsistent configuration, " 852 "please check.\n", dev->name); 853 854 if (send_addr_notify) 855 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 856 return err; 857} 858 859static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 860{ 861 struct ifinfomsg *ifm; 862 struct net_device *dev; 863 int err; 864 struct nlattr *tb[IFLA_MAX+1]; 865 char ifname[IFNAMSIZ]; 866 867 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 868 if (err < 0) 869 goto errout; 870 871 if (tb[IFLA_IFNAME]) 872 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 873 else 874 ifname[0] = '\0'; 875 876 err = -EINVAL; 877 ifm = nlmsg_data(nlh); 878 if (ifm->ifi_index > 0) 879 dev = dev_get_by_index(ifm->ifi_index); 880 else if (tb[IFLA_IFNAME]) 881 dev = dev_get_by_name(ifname); 882 else 883 goto errout; 884 885 if (dev == NULL) { 886 err = -ENODEV; 887 goto errout; 888 } 889 890 if (tb[IFLA_ADDRESS] && 891 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 892 goto errout_dev; 893 894 if (tb[IFLA_BROADCAST] && 895 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 896 goto errout_dev; 897 898 err = do_setlink(dev, ifm, tb, ifname, 0); 899errout_dev: 900 dev_put(dev); 901errout: 902 return err; 903} 904 905static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 906{ 907 const struct rtnl_link_ops *ops; 908 struct net_device *dev; 909 struct ifinfomsg *ifm; 910 char ifname[IFNAMSIZ]; 911 struct nlattr *tb[IFLA_MAX+1]; 912 int err; 913 914 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 915 if (err < 0) 916 return err; 917 918 if (tb[IFLA_IFNAME]) 919 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 920 921 ifm = nlmsg_data(nlh); 922 if (ifm->ifi_index > 0) 923 dev = __dev_get_by_index(ifm->ifi_index); 924 else if (tb[IFLA_IFNAME]) 925 dev = __dev_get_by_name(ifname); 926 else 927 return -EINVAL; 928 929 if (!dev) 930 return -ENODEV; 931 932 ops = dev->rtnl_link_ops; 933 if (!ops) 934 return -EOPNOTSUPP; 935 936 ops->dellink(dev); 937 return 0; 938} 939 940struct net_device *rtnl_create_link(char *ifname, 941 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 942{ 943 int err; 944 struct net_device *dev; 945 946 err = -ENOMEM; 947 dev = alloc_netdev(ops->priv_size, ifname, ops->setup); 948 if (!dev) 949 goto err; 950 951 if (strchr(dev->name, '%')) { 952 err = dev_alloc_name(dev, dev->name); 953 if (err < 0) 954 goto err_free; 955 } 956 957 dev->rtnl_link_ops = ops; 958 959 if (tb[IFLA_MTU]) 960 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 961 if (tb[IFLA_ADDRESS]) 962 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 963 nla_len(tb[IFLA_ADDRESS])); 964 if (tb[IFLA_BROADCAST]) 965 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 966 nla_len(tb[IFLA_BROADCAST])); 967 if (tb[IFLA_TXQLEN]) 968 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 969 if (tb[IFLA_OPERSTATE]) 970 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 971 if (tb[IFLA_LINKMODE]) 972 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 973 974 return dev; 975 976err_free: 977 free_netdev(dev); 978err: 979 return ERR_PTR(err); 980} 981 982static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 983{ 984 const struct rtnl_link_ops *ops; 985 struct net_device *dev; 986 struct ifinfomsg *ifm; 987 char kind[MODULE_NAME_LEN]; 988 char ifname[IFNAMSIZ]; 989 struct nlattr *tb[IFLA_MAX+1]; 990 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 991 int err; 992 993#ifdef CONFIG_KMOD 994replay: 995#endif 996 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 997 if (err < 0) 998 return err; 999 1000 if (tb[IFLA_IFNAME]) 1001 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1002 else 1003 ifname[0] = '\0'; 1004 1005 ifm = nlmsg_data(nlh); 1006 if (ifm->ifi_index > 0) 1007 dev = __dev_get_by_index(ifm->ifi_index); 1008 else if (ifname[0]) 1009 dev = __dev_get_by_name(ifname); 1010 else 1011 dev = NULL; 1012 1013 if (tb[IFLA_LINKINFO]) { 1014 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 1015 tb[IFLA_LINKINFO], ifla_info_policy); 1016 if (err < 0) 1017 return err; 1018 } else 1019 memset(linkinfo, 0, sizeof(linkinfo)); 1020 1021 if (linkinfo[IFLA_INFO_KIND]) { 1022 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 1023 ops = rtnl_link_ops_get(kind); 1024 } else { 1025 kind[0] = '\0'; 1026 ops = NULL; 1027 } 1028 1029 if (1) { 1030 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; 1031 1032 if (ops) { 1033 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 1034 err = nla_parse_nested(attr, ops->maxtype, 1035 linkinfo[IFLA_INFO_DATA], 1036 ops->policy); 1037 if (err < 0) 1038 return err; 1039 data = attr; 1040 } 1041 if (ops->validate) { 1042 err = ops->validate(tb, data); 1043 if (err < 0) 1044 return err; 1045 } 1046 } 1047 1048 if (dev) { 1049 int modified = 0; 1050 1051 if (nlh->nlmsg_flags & NLM_F_EXCL) 1052 return -EEXIST; 1053 if (nlh->nlmsg_flags & NLM_F_REPLACE) 1054 return -EOPNOTSUPP; 1055 1056 if (linkinfo[IFLA_INFO_DATA]) { 1057 if (!ops || ops != dev->rtnl_link_ops || 1058 !ops->changelink) 1059 return -EOPNOTSUPP; 1060 1061 err = ops->changelink(dev, tb, data); 1062 if (err < 0) 1063 return err; 1064 modified = 1; 1065 } 1066 1067 return do_setlink(dev, ifm, tb, ifname, modified); 1068 } 1069 1070 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) 1071 return -ENODEV; 1072 1073 if (ifm->ifi_index || ifm->ifi_flags || ifm->ifi_change) 1074 return -EOPNOTSUPP; 1075 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 1076 return -EOPNOTSUPP; 1077 1078 if (!ops) { 1079#ifdef CONFIG_KMOD 1080 if (kind[0]) { 1081 __rtnl_unlock(); 1082 request_module("rtnl-link-%s", kind); 1083 rtnl_lock(); 1084 ops = rtnl_link_ops_get(kind); 1085 if (ops) 1086 goto replay; 1087 } 1088#endif 1089 return -EOPNOTSUPP; 1090 } 1091 1092 if (!ifname[0]) 1093 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 1094 1095 dev = rtnl_create_link(ifname, ops, tb); 1096 1097 if (IS_ERR(dev)) 1098 err = PTR_ERR(dev); 1099 else if (ops->newlink) 1100 err = ops->newlink(dev, tb, data); 1101 else 1102 err = register_netdevice(dev); 1103 1104 if (err < 0 && !IS_ERR(dev)) 1105 free_netdev(dev); 1106 return err; 1107 } 1108} 1109 1110static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) 1111{ 1112 struct ifinfomsg *ifm; 1113 struct nlattr *tb[IFLA_MAX+1]; 1114 struct net_device *dev = NULL; 1115 struct sk_buff *nskb; 1116 int err; 1117 1118 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1119 if (err < 0) 1120 return err; 1121 1122 ifm = nlmsg_data(nlh); 1123 if (ifm->ifi_index > 0) { 1124 dev = dev_get_by_index(ifm->ifi_index); 1125 if (dev == NULL) 1126 return -ENODEV; 1127 } else 1128 return -EINVAL; 1129 1130 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); 1131 if (nskb == NULL) { 1132 err = -ENOBUFS; 1133 goto errout; 1134 } 1135 1136 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid, 1137 nlh->nlmsg_seq, 0, 0); 1138 if (err < 0) { 1139 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 1140 WARN_ON(err == -EMSGSIZE); 1141 kfree_skb(nskb); 1142 goto errout; 1143 } 1144 err = rtnl_unicast(nskb, NETLINK_CB(skb).pid); 1145errout: 1146 dev_put(dev); 1147 1148 return err; 1149} 1150 1151static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 1152{ 1153 int idx; 1154 int s_idx = cb->family; 1155 1156 if (s_idx == 0) 1157 s_idx = 1; 1158 for (idx=1; idx<NPROTO; idx++) { 1159 int type = cb->nlh->nlmsg_type-RTM_BASE; 1160 if (idx < s_idx || idx == PF_PACKET) 1161 continue; 1162 if (rtnl_msg_handlers[idx] == NULL || 1163 rtnl_msg_handlers[idx][type].dumpit == NULL) 1164 continue; 1165 if (idx > s_idx) 1166 memset(&cb->args[0], 0, sizeof(cb->args)); 1167 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 1168 break; 1169 } 1170 cb->family = idx; 1171 1172 return skb->len; 1173} 1174 1175void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) 1176{ 1177 struct sk_buff *skb; 1178 int err = -ENOBUFS; 1179 1180 skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); 1181 if (skb == NULL) 1182 goto errout; 1183 1184 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0); 1185 if (err < 0) { 1186 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 1187 WARN_ON(err == -EMSGSIZE); 1188 kfree_skb(skb); 1189 goto errout; 1190 } 1191 err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); 1192errout: 1193 if (err < 0) 1194 rtnl_set_sk_err(RTNLGRP_LINK, err); 1195} 1196 1197/* Protected by RTNL sempahore. */ 1198static struct rtattr **rta_buf; 1199static int rtattr_max; 1200 1201/* Process one rtnetlink message. */ 1202 1203static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 1204{ 1205 rtnl_doit_func doit; 1206 int sz_idx, kind; 1207 int min_len; 1208 int family; 1209 int type; 1210 int err; 1211 1212 type = nlh->nlmsg_type; 1213 if (type > RTM_MAX) 1214 return -EOPNOTSUPP; 1215 1216 type -= RTM_BASE; 1217 1218 /* All the messages must have at least 1 byte length */ 1219 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) 1220 return 0; 1221 1222 family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family; 1223 if (family >= NPROTO) 1224 return -EAFNOSUPPORT; 1225 1226 sz_idx = type>>2; 1227 kind = type&3; 1228 1229 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) 1230 return -EPERM; 1231 1232 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 1233 rtnl_dumpit_func dumpit; 1234 1235 dumpit = rtnl_get_dumpit(family, type); 1236 if (dumpit == NULL) 1237 return -EOPNOTSUPP; 1238 1239 __rtnl_unlock(); 1240 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL); 1241 rtnl_lock(); 1242 return err; 1243 } 1244 1245 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); 1246 1247 min_len = rtm_min[sz_idx]; 1248 if (nlh->nlmsg_len < min_len) 1249 return -EINVAL; 1250 1251 if (nlh->nlmsg_len > min_len) { 1252 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 1253 struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len); 1254 1255 while (RTA_OK(attr, attrlen)) { 1256 unsigned flavor = attr->rta_type; 1257 if (flavor) { 1258 if (flavor > rta_max[sz_idx]) 1259 return -EINVAL; 1260 rta_buf[flavor-1] = attr; 1261 } 1262 attr = RTA_NEXT(attr, attrlen); 1263 } 1264 } 1265 1266 doit = rtnl_get_doit(family, type); 1267 if (doit == NULL) 1268 return -EOPNOTSUPP; 1269 1270 return doit(skb, nlh, (void *)&rta_buf[0]); 1271} 1272 1273static void rtnetlink_rcv(struct sock *sk, int len) 1274{ 1275 unsigned int qlen = 0; 1276 1277 do { 1278 mutex_lock(&rtnl_mutex); 1279 netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg); 1280 mutex_unlock(&rtnl_mutex); 1281 1282 netdev_run_todo(); 1283 } while (qlen); 1284} 1285 1286static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 1287{ 1288 struct net_device *dev = ptr; 1289 switch (event) { 1290 case NETDEV_UNREGISTER: 1291 rtmsg_ifinfo(RTM_DELLINK, dev, ~0U); 1292 break; 1293 case NETDEV_REGISTER: 1294 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); 1295 break; 1296 case NETDEV_UP: 1297 case NETDEV_DOWN: 1298 rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); 1299 break; 1300 case NETDEV_CHANGE: 1301 case NETDEV_GOING_DOWN: 1302 break; 1303 default: 1304 rtmsg_ifinfo(RTM_NEWLINK, dev, 0); 1305 break; 1306 } 1307 return NOTIFY_DONE; 1308} 1309 1310static struct notifier_block rtnetlink_dev_notifier = { 1311 .notifier_call = rtnetlink_event, 1312}; 1313 1314void __init rtnetlink_init(void) 1315{ 1316 int i; 1317 1318 rtattr_max = 0; 1319 for (i = 0; i < ARRAY_SIZE(rta_max); i++) 1320 if (rta_max[i] > rtattr_max) 1321 rtattr_max = rta_max[i]; 1322 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); 1323 if (!rta_buf) 1324 panic("rtnetlink_init: cannot allocate rta_buf\n"); 1325 1326 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv, 1327 &rtnl_mutex, THIS_MODULE); 1328 if (rtnl == NULL) 1329 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 1330 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); 1331 register_netdevice_notifier(&rtnetlink_dev_notifier); 1332 1333 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo); 1334 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL); 1335 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL); 1336 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL); 1337 1338 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all); 1339 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all); 1340} 1341 1342EXPORT_SYMBOL(__rta_fill); 1343EXPORT_SYMBOL(rtattr_strlcpy); 1344EXPORT_SYMBOL(rtattr_parse); 1345EXPORT_SYMBOL(__rtattr_parse_nested_compat); 1346EXPORT_SYMBOL(rtnetlink_put_metrics); 1347EXPORT_SYMBOL(rtnl_lock); 1348EXPORT_SYMBOL(rtnl_trylock); 1349EXPORT_SYMBOL(rtnl_unlock); 1350EXPORT_SYMBOL(rtnl_unicast); 1351EXPORT_SYMBOL(rtnl_notify); 1352EXPORT_SYMBOL(rtnl_set_sk_err); 1353EXPORT_SYMBOL(rtnl_create_link); 1354EXPORT_SYMBOL(ifla_policy); 1355