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 55 struct rtnl_link 56 { 57 rtnl_doit_func doit; 58 rtnl_dumpit_func dumpit; 59 }; 60 61 static DEFINE_MUTEX(rtnl_mutex); 62 static struct sock *rtnl; 63 64 void rtnl_lock(void) 65 { 66 mutex_lock(&rtnl_mutex); 67 } 68 69 void __rtnl_unlock(void) 70 { 71 mutex_unlock(&rtnl_mutex); 72 } 73 74 void 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 82 int rtnl_trylock(void) 83 { 84 return mutex_trylock(&rtnl_mutex); 85 } 86 87 int 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 } 99 100 int __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 } 112 113 static struct rtnl_link *rtnl_msg_handlers[NPROTO]; 114 115 static 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 } 128 129 static 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 } 139 140 static 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 */ 168 int __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 } 194 195 EXPORT_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 */ 206 void 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 } 214 215 EXPORT_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 */ 224 int 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 } 239 240 EXPORT_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 */ 249 void 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 } 256 257 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 258 259 static 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 */ 271 int __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 } 279 280 EXPORT_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 */ 288 int 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 } 297 298 EXPORT_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 */ 306 void __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 } 316 317 EXPORT_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 */ 323 void rtnl_link_unregister(struct rtnl_link_ops *ops) 324 { 325 rtnl_lock(); 326 __rtnl_link_unregister(ops); 327 rtnl_unlock(); 328 } 329 330 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 331 332 static 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 } 342 343 static 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 } 364 365 static 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; 394 395 err_cancel_data: 396 nla_nest_cancel(skb, data); 397 err_cancel_link: 398 nla_nest_cancel(skb, linkinfo); 399 out: 400 return err; 401 } 402 403 static 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 }; 416 417 static 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 }; 428 429 void __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 } 440 441 size_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 } 455 456 int 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 } 468 469 int rtnl_unicast(struct sk_buff *skb, u32 pid) 470 { 471 return nlmsg_unicast(rtnl, skb, pid); 472 } 473 474 int 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 } 484 485 void rtnl_set_sk_err(u32 group, int error) 486 { 487 netlink_set_err(rtnl, 0, group, error); 488 } 489 490 int 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); 512 513 nla_put_failure: 514 return nla_nest_cancel(skb, mx); 515 } 516 517 int 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 } 535 536 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 537 538 static 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 } 564 565 static 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 }; 596 597 static 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 } 615 616 static 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_U32(skb, IFLA_WEIGHT, dev->weight); 638 NLA_PUT_U8(skb, IFLA_OPERSTATE, 639 netif_running(dev) ? dev->operstate : IF_OPER_DOWN); 640 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); 641 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); 642 643 if (dev->ifindex != dev->iflink) 644 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); 645 646 if (dev->master) 647 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); 648 649 if (dev->qdisc_sleeping) 650 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc_sleeping->ops->id); 651 652 if (1) { 653 struct rtnl_link_ifmap map = { 654 .mem_start = dev->mem_start, 655 .mem_end = dev->mem_end, 656 .base_addr = dev->base_addr, 657 .irq = dev->irq, 658 .dma = dev->dma, 659 .port = dev->if_port, 660 }; 661 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); 662 } 663 664 if (dev->addr_len) { 665 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); 666 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); 667 } 668 669 if (dev->get_stats) { 670 struct net_device_stats *stats = dev->get_stats(dev); 671 if (stats) { 672 struct nlattr *attr; 673 674 attr = nla_reserve(skb, IFLA_STATS, 675 sizeof(struct rtnl_link_stats)); 676 if (attr == NULL) 677 goto nla_put_failure; 678 679 copy_rtnl_link_stats(nla_data(attr), stats); 680 } 681 } 682 683 if (dev->rtnl_link_ops) { 684 if (rtnl_link_fill(skb, dev) < 0) 685 goto nla_put_failure; 686 } 687 688 return nlmsg_end(skb, nlh); 689 690 nla_put_failure: 691 nlmsg_cancel(skb, nlh); 692 return -EMSGSIZE; 693 } 694 695 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 696 { 697 int idx; 698 int s_idx = cb->args[0]; 699 struct net_device *dev; 700 701 idx = 0; 702 for_each_netdev(dev) { 703 if (idx < s_idx) 704 goto cont; 705 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 706 NETLINK_CB(cb->skb).pid, 707 cb->nlh->nlmsg_seq, 0, NLM_F_MULTI) <= 0) 708 break; 709 cont: 710 idx++; 711 } 712 cb->args[0] = idx; 713 714 return skb->len; 715 } 716 717 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 718 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 719 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 720 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 721 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 722 [IFLA_MTU] = { .type = NLA_U32 }, 723 [IFLA_TXQLEN] = { .type = NLA_U32 }, 724 [IFLA_WEIGHT] = { .type = NLA_U32 }, 725 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 726 [IFLA_LINKMODE] = { .type = NLA_U8 }, 727 }; 728 729 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 730 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 731 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 732 }; 733 734 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, 735 struct nlattr **tb, char *ifname, int modified) 736 { 737 int send_addr_notify = 0; 738 int err; 739 740 if (tb[IFLA_MAP]) { 741 struct rtnl_link_ifmap *u_map; 742 struct ifmap k_map; 743 744 if (!dev->set_config) { 745 err = -EOPNOTSUPP; 746 goto errout; 747 } 748 749 if (!netif_device_present(dev)) { 750 err = -ENODEV; 751 goto errout; 752 } 753 754 u_map = nla_data(tb[IFLA_MAP]); 755 k_map.mem_start = (unsigned long) u_map->mem_start; 756 k_map.mem_end = (unsigned long) u_map->mem_end; 757 k_map.base_addr = (unsigned short) u_map->base_addr; 758 k_map.irq = (unsigned char) u_map->irq; 759 k_map.dma = (unsigned char) u_map->dma; 760 k_map.port = (unsigned char) u_map->port; 761 762 err = dev->set_config(dev, &k_map); 763 if (err < 0) 764 goto errout; 765 766 modified = 1; 767 } 768 769 if (tb[IFLA_ADDRESS]) { 770 struct sockaddr *sa; 771 int len; 772 773 if (!dev->set_mac_address) { 774 err = -EOPNOTSUPP; 775 goto errout; 776 } 777 778 if (!netif_device_present(dev)) { 779 err = -ENODEV; 780 goto errout; 781 } 782 783 len = sizeof(sa_family_t) + dev->addr_len; 784 sa = kmalloc(len, GFP_KERNEL); 785 if (!sa) { 786 err = -ENOMEM; 787 goto errout; 788 } 789 sa->sa_family = dev->type; 790 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 791 dev->addr_len); 792 err = dev->set_mac_address(dev, sa); 793 kfree(sa); 794 if (err) 795 goto errout; 796 send_addr_notify = 1; 797 modified = 1; 798 } 799 800 if (tb[IFLA_MTU]) { 801 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 802 if (err < 0) 803 goto errout; 804 modified = 1; 805 } 806 807 /* 808 * Interface selected by interface index but interface 809 * name provided implies that a name change has been 810 * requested. 811 */ 812 if (ifm->ifi_index > 0 && ifname[0]) { 813 err = dev_change_name(dev, ifname); 814 if (err < 0) 815 goto errout; 816 modified = 1; 817 } 818 819 if (tb[IFLA_BROADCAST]) { 820 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 821 send_addr_notify = 1; 822 } 823 824 if (ifm->ifi_flags || ifm->ifi_change) { 825 unsigned int flags = ifm->ifi_flags; 826 827 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 828 if (ifm->ifi_change) 829 flags = (flags & ifm->ifi_change) | 830 (dev->flags & ~ifm->ifi_change); 831 dev_change_flags(dev, flags); 832 } 833 834 if (tb[IFLA_TXQLEN]) 835 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 836 837 if (tb[IFLA_WEIGHT]) 838 dev->weight = nla_get_u32(tb[IFLA_WEIGHT]); 839 840 if (tb[IFLA_OPERSTATE]) 841 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 842 843 if (tb[IFLA_LINKMODE]) { 844 write_lock_bh(&dev_base_lock); 845 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 846 write_unlock_bh(&dev_base_lock); 847 } 848 849 err = 0; 850 851 errout: 852 if (err < 0 && modified && net_ratelimit()) 853 printk(KERN_WARNING "A link change request failed with " 854 "some changes comitted already. Interface %s may " 855 "have been left with an inconsistent configuration, " 856 "please check.\n", dev->name); 857 858 if (send_addr_notify) 859 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 860 return err; 861 } 862 863 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 864 { 865 struct ifinfomsg *ifm; 866 struct net_device *dev; 867 int err; 868 struct nlattr *tb[IFLA_MAX+1]; 869 char ifname[IFNAMSIZ]; 870 871 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 872 if (err < 0) 873 goto errout; 874 875 if (tb[IFLA_IFNAME]) 876 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 877 else 878 ifname[0] = '\0'; 879 880 err = -EINVAL; 881 ifm = nlmsg_data(nlh); 882 if (ifm->ifi_index > 0) 883 dev = dev_get_by_index(ifm->ifi_index); 884 else if (tb[IFLA_IFNAME]) 885 dev = dev_get_by_name(ifname); 886 else 887 goto errout; 888 889 if (dev == NULL) { 890 err = -ENODEV; 891 goto errout; 892 } 893 894 if (tb[IFLA_ADDRESS] && 895 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 896 goto errout_dev; 897 898 if (tb[IFLA_BROADCAST] && 899 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 900 goto errout_dev; 901 902 err = do_setlink(dev, ifm, tb, ifname, 0); 903 errout_dev: 904 dev_put(dev); 905 errout: 906 return err; 907 } 908 909 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 910 { 911 const struct rtnl_link_ops *ops; 912 struct net_device *dev; 913 struct ifinfomsg *ifm; 914 char ifname[IFNAMSIZ]; 915 struct nlattr *tb[IFLA_MAX+1]; 916 int err; 917 918 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 919 if (err < 0) 920 return err; 921 922 if (tb[IFLA_IFNAME]) 923 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 924 925 ifm = nlmsg_data(nlh); 926 if (ifm->ifi_index > 0) 927 dev = __dev_get_by_index(ifm->ifi_index); 928 else if (tb[IFLA_IFNAME]) 929 dev = __dev_get_by_name(ifname); 930 else 931 return -EINVAL; 932 933 if (!dev) 934 return -ENODEV; 935 936 ops = dev->rtnl_link_ops; 937 if (!ops) 938 return -EOPNOTSUPP; 939 940 ops->dellink(dev); 941 return 0; 942 } 943 944 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 945 { 946 const struct rtnl_link_ops *ops; 947 struct net_device *dev; 948 struct ifinfomsg *ifm; 949 char kind[MODULE_NAME_LEN]; 950 char ifname[IFNAMSIZ]; 951 struct nlattr *tb[IFLA_MAX+1]; 952 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 953 int err; 954 955 replay: 956 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 957 if (err < 0) 958 return err; 959 960 if (tb[IFLA_IFNAME]) 961 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 962 else 963 ifname[0] = '\0'; 964 965 ifm = nlmsg_data(nlh); 966 if (ifm->ifi_index > 0) 967 dev = __dev_get_by_index(ifm->ifi_index); 968 else if (ifname[0]) 969 dev = __dev_get_by_name(ifname); 970 else 971 dev = NULL; 972 973 if (tb[IFLA_LINKINFO]) { 974 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 975 tb[IFLA_LINKINFO], ifla_info_policy); 976 if (err < 0) 977 return err; 978 } else 979 memset(linkinfo, 0, sizeof(linkinfo)); 980 981 if (linkinfo[IFLA_INFO_KIND]) { 982 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 983 ops = rtnl_link_ops_get(kind); 984 } else { 985 kind[0] = '\0'; 986 ops = NULL; 987 } 988 989 if (1) { 990 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; 991 992 if (ops) { 993 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 994 err = nla_parse_nested(attr, ops->maxtype, 995 linkinfo[IFLA_INFO_DATA], 996 ops->policy); 997 if (err < 0) 998 return err; 999 data = attr; 1000 } 1001 if (ops->validate) { 1002 err = ops->validate(tb, data); 1003 if (err < 0) 1004 return err; 1005 } 1006 } 1007 1008 if (dev) { 1009 int modified = 0; 1010 1011 if (nlh->nlmsg_flags & NLM_F_EXCL) 1012 return -EEXIST; 1013 if (nlh->nlmsg_flags & NLM_F_REPLACE) 1014 return -EOPNOTSUPP; 1015 1016 if (linkinfo[IFLA_INFO_DATA]) { 1017 if (!ops || ops != dev->rtnl_link_ops || 1018 !ops->changelink) 1019 return -EOPNOTSUPP; 1020 1021 err = ops->changelink(dev, tb, data); 1022 if (err < 0) 1023 return err; 1024 modified = 1; 1025 } 1026 1027 return do_setlink(dev, ifm, tb, ifname, modified); 1028 } 1029 1030 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) 1031 return -ENODEV; 1032 1033 if (ifm->ifi_index || ifm->ifi_flags || ifm->ifi_change) 1034 return -EOPNOTSUPP; 1035 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 1036 return -EOPNOTSUPP; 1037 1038 if (!ops) { 1039 #ifdef CONFIG_KMOD 1040 if (kind[0]) { 1041 __rtnl_unlock(); 1042 request_module("rtnl-link-%s", kind); 1043 rtnl_lock(); 1044 ops = rtnl_link_ops_get(kind); 1045 if (ops) 1046 goto replay; 1047 } 1048 #endif 1049 return -EOPNOTSUPP; 1050 } 1051 1052 if (!ifname[0]) 1053 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 1054 dev = alloc_netdev(ops->priv_size, ifname, ops->setup); 1055 if (!dev) 1056 return -ENOMEM; 1057 1058 if (strchr(dev->name, '%')) { 1059 err = dev_alloc_name(dev, dev->name); 1060 if (err < 0) 1061 goto err_free; 1062 } 1063 dev->rtnl_link_ops = ops; 1064 1065 if (tb[IFLA_MTU]) 1066 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1067 if (tb[IFLA_ADDRESS]) 1068 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1069 nla_len(tb[IFLA_ADDRESS])); 1070 if (tb[IFLA_BROADCAST]) 1071 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1072 nla_len(tb[IFLA_BROADCAST])); 1073 if (tb[IFLA_TXQLEN]) 1074 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1075 if (tb[IFLA_WEIGHT]) 1076 dev->weight = nla_get_u32(tb[IFLA_WEIGHT]); 1077 if (tb[IFLA_OPERSTATE]) 1078 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1079 if (tb[IFLA_LINKMODE]) 1080 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1081 1082 if (ops->newlink) 1083 err = ops->newlink(dev, tb, data); 1084 else 1085 err = register_netdevice(dev); 1086 err_free: 1087 if (err < 0) 1088 free_netdev(dev); 1089 return err; 1090 } 1091 } 1092 1093 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) 1094 { 1095 struct ifinfomsg *ifm; 1096 struct nlattr *tb[IFLA_MAX+1]; 1097 struct net_device *dev = NULL; 1098 struct sk_buff *nskb; 1099 int err; 1100 1101 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1102 if (err < 0) 1103 return err; 1104 1105 ifm = nlmsg_data(nlh); 1106 if (ifm->ifi_index > 0) { 1107 dev = dev_get_by_index(ifm->ifi_index); 1108 if (dev == NULL) 1109 return -ENODEV; 1110 } else 1111 return -EINVAL; 1112 1113 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); 1114 if (nskb == NULL) { 1115 err = -ENOBUFS; 1116 goto errout; 1117 } 1118 1119 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid, 1120 nlh->nlmsg_seq, 0, 0); 1121 if (err < 0) { 1122 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 1123 WARN_ON(err == -EMSGSIZE); 1124 kfree_skb(nskb); 1125 goto errout; 1126 } 1127 err = rtnl_unicast(nskb, NETLINK_CB(skb).pid); 1128 errout: 1129 dev_put(dev); 1130 1131 return err; 1132 } 1133 1134 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 1135 { 1136 int idx; 1137 int s_idx = cb->family; 1138 1139 if (s_idx == 0) 1140 s_idx = 1; 1141 for (idx=1; idx<NPROTO; idx++) { 1142 int type = cb->nlh->nlmsg_type-RTM_BASE; 1143 if (idx < s_idx || idx == PF_PACKET) 1144 continue; 1145 if (rtnl_msg_handlers[idx] == NULL || 1146 rtnl_msg_handlers[idx][type].dumpit == NULL) 1147 continue; 1148 if (idx > s_idx) 1149 memset(&cb->args[0], 0, sizeof(cb->args)); 1150 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 1151 break; 1152 } 1153 cb->family = idx; 1154 1155 return skb->len; 1156 } 1157 1158 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) 1159 { 1160 struct sk_buff *skb; 1161 int err = -ENOBUFS; 1162 1163 skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); 1164 if (skb == NULL) 1165 goto errout; 1166 1167 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0); 1168 if (err < 0) { 1169 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 1170 WARN_ON(err == -EMSGSIZE); 1171 kfree_skb(skb); 1172 goto errout; 1173 } 1174 err = rtnl_notify(skb, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); 1175 errout: 1176 if (err < 0) 1177 rtnl_set_sk_err(RTNLGRP_LINK, err); 1178 } 1179 1180 /* Protected by RTNL sempahore. */ 1181 static struct rtattr **rta_buf; 1182 static int rtattr_max; 1183 1184 /* Process one rtnetlink message. */ 1185 1186 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 1187 { 1188 rtnl_doit_func doit; 1189 int sz_idx, kind; 1190 int min_len; 1191 int family; 1192 int type; 1193 int err; 1194 1195 type = nlh->nlmsg_type; 1196 if (type > RTM_MAX) 1197 return -EOPNOTSUPP; 1198 1199 type -= RTM_BASE; 1200 1201 /* All the messages must have at least 1 byte length */ 1202 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) 1203 return 0; 1204 1205 family = ((struct rtgenmsg*)NLMSG_DATA(nlh))->rtgen_family; 1206 if (family >= NPROTO) 1207 return -EAFNOSUPPORT; 1208 1209 sz_idx = type>>2; 1210 kind = type&3; 1211 1212 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) 1213 return -EPERM; 1214 1215 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 1216 rtnl_dumpit_func dumpit; 1217 1218 dumpit = rtnl_get_dumpit(family, type); 1219 if (dumpit == NULL) 1220 return -EOPNOTSUPP; 1221 1222 __rtnl_unlock(); 1223 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL); 1224 rtnl_lock(); 1225 return err; 1226 } 1227 1228 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); 1229 1230 min_len = rtm_min[sz_idx]; 1231 if (nlh->nlmsg_len < min_len) 1232 return -EINVAL; 1233 1234 if (nlh->nlmsg_len > min_len) { 1235 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 1236 struct rtattr *attr = (void*)nlh + NLMSG_ALIGN(min_len); 1237 1238 while (RTA_OK(attr, attrlen)) { 1239 unsigned flavor = attr->rta_type; 1240 if (flavor) { 1241 if (flavor > rta_max[sz_idx]) 1242 return -EINVAL; 1243 rta_buf[flavor-1] = attr; 1244 } 1245 attr = RTA_NEXT(attr, attrlen); 1246 } 1247 } 1248 1249 doit = rtnl_get_doit(family, type); 1250 if (doit == NULL) 1251 return -EOPNOTSUPP; 1252 1253 return doit(skb, nlh, (void *)&rta_buf[0]); 1254 } 1255 1256 static void rtnetlink_rcv(struct sock *sk, int len) 1257 { 1258 unsigned int qlen = 0; 1259 1260 do { 1261 mutex_lock(&rtnl_mutex); 1262 netlink_run_queue(sk, &qlen, &rtnetlink_rcv_msg); 1263 mutex_unlock(&rtnl_mutex); 1264 1265 netdev_run_todo(); 1266 } while (qlen); 1267 } 1268 1269 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 1270 { 1271 struct net_device *dev = ptr; 1272 switch (event) { 1273 case NETDEV_UNREGISTER: 1274 rtmsg_ifinfo(RTM_DELLINK, dev, ~0U); 1275 break; 1276 case NETDEV_REGISTER: 1277 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); 1278 break; 1279 case NETDEV_UP: 1280 case NETDEV_DOWN: 1281 rtmsg_ifinfo(RTM_NEWLINK, dev, IFF_UP|IFF_RUNNING); 1282 break; 1283 case NETDEV_CHANGE: 1284 case NETDEV_GOING_DOWN: 1285 break; 1286 default: 1287 rtmsg_ifinfo(RTM_NEWLINK, dev, 0); 1288 break; 1289 } 1290 return NOTIFY_DONE; 1291 } 1292 1293 static struct notifier_block rtnetlink_dev_notifier = { 1294 .notifier_call = rtnetlink_event, 1295 }; 1296 1297 void __init rtnetlink_init(void) 1298 { 1299 int i; 1300 1301 rtattr_max = 0; 1302 for (i = 0; i < ARRAY_SIZE(rta_max); i++) 1303 if (rta_max[i] > rtattr_max) 1304 rtattr_max = rta_max[i]; 1305 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); 1306 if (!rta_buf) 1307 panic("rtnetlink_init: cannot allocate rta_buf\n"); 1308 1309 rtnl = netlink_kernel_create(NETLINK_ROUTE, RTNLGRP_MAX, rtnetlink_rcv, 1310 &rtnl_mutex, THIS_MODULE); 1311 if (rtnl == NULL) 1312 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 1313 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); 1314 register_netdevice_notifier(&rtnetlink_dev_notifier); 1315 1316 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo); 1317 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL); 1318 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL); 1319 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL); 1320 1321 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all); 1322 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all); 1323 } 1324 1325 EXPORT_SYMBOL(__rta_fill); 1326 EXPORT_SYMBOL(rtattr_strlcpy); 1327 EXPORT_SYMBOL(rtattr_parse); 1328 EXPORT_SYMBOL(__rtattr_parse_nested_compat); 1329 EXPORT_SYMBOL(rtnetlink_put_metrics); 1330 EXPORT_SYMBOL(rtnl_lock); 1331 EXPORT_SYMBOL(rtnl_trylock); 1332 EXPORT_SYMBOL(rtnl_unlock); 1333 EXPORT_SYMBOL(rtnl_unicast); 1334 EXPORT_SYMBOL(rtnl_notify); 1335 EXPORT_SYMBOL(rtnl_set_sk_err); 1336