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/pci.h> 39 40 #include <asm/uaccess.h> 41 #include <asm/system.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 #include <net/net_namespace.h> 55 56 struct rtnl_link { 57 rtnl_doit_func doit; 58 rtnl_dumpit_func dumpit; 59 }; 60 61 static DEFINE_MUTEX(rtnl_mutex); 62 63 void rtnl_lock(void) 64 { 65 mutex_lock(&rtnl_mutex); 66 } 67 EXPORT_SYMBOL(rtnl_lock); 68 69 void __rtnl_unlock(void) 70 { 71 mutex_unlock(&rtnl_mutex); 72 } 73 74 void rtnl_unlock(void) 75 { 76 /* This fellow will unlock it for us. */ 77 netdev_run_todo(); 78 } 79 EXPORT_SYMBOL(rtnl_unlock); 80 81 int rtnl_trylock(void) 82 { 83 return mutex_trylock(&rtnl_mutex); 84 } 85 EXPORT_SYMBOL(rtnl_trylock); 86 87 int rtnl_is_locked(void) 88 { 89 return mutex_is_locked(&rtnl_mutex); 90 } 91 EXPORT_SYMBOL(rtnl_is_locked); 92 93 #ifdef CONFIG_PROVE_LOCKING 94 int lockdep_rtnl_is_held(void) 95 { 96 return lockdep_is_held(&rtnl_mutex); 97 } 98 EXPORT_SYMBOL(lockdep_rtnl_is_held); 99 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 100 101 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 102 103 static inline int rtm_msgindex(int msgtype) 104 { 105 int msgindex = msgtype - RTM_BASE; 106 107 /* 108 * msgindex < 0 implies someone tried to register a netlink 109 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 110 * the message type has not been added to linux/rtnetlink.h 111 */ 112 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 113 114 return msgindex; 115 } 116 117 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 118 { 119 struct rtnl_link *tab; 120 121 if (protocol <= RTNL_FAMILY_MAX) 122 tab = rtnl_msg_handlers[protocol]; 123 else 124 tab = NULL; 125 126 if (tab == NULL || tab[msgindex].doit == NULL) 127 tab = rtnl_msg_handlers[PF_UNSPEC]; 128 129 return tab ? tab[msgindex].doit : NULL; 130 } 131 132 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 133 { 134 struct rtnl_link *tab; 135 136 if (protocol <= RTNL_FAMILY_MAX) 137 tab = rtnl_msg_handlers[protocol]; 138 else 139 tab = NULL; 140 141 if (tab == NULL || tab[msgindex].dumpit == NULL) 142 tab = rtnl_msg_handlers[PF_UNSPEC]; 143 144 return tab ? tab[msgindex].dumpit : NULL; 145 } 146 147 /** 148 * __rtnl_register - Register a rtnetlink message type 149 * @protocol: Protocol family or PF_UNSPEC 150 * @msgtype: rtnetlink message type 151 * @doit: Function pointer called for each request message 152 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 153 * 154 * Registers the specified function pointers (at least one of them has 155 * to be non-NULL) to be called whenever a request message for the 156 * specified protocol family and message type is received. 157 * 158 * The special protocol family PF_UNSPEC may be used to define fallback 159 * function pointers for the case when no entry for the specific protocol 160 * family exists. 161 * 162 * Returns 0 on success or a negative error code. 163 */ 164 int __rtnl_register(int protocol, int msgtype, 165 rtnl_doit_func doit, rtnl_dumpit_func dumpit) 166 { 167 struct rtnl_link *tab; 168 int msgindex; 169 170 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 171 msgindex = rtm_msgindex(msgtype); 172 173 tab = rtnl_msg_handlers[protocol]; 174 if (tab == NULL) { 175 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 176 if (tab == NULL) 177 return -ENOBUFS; 178 179 rtnl_msg_handlers[protocol] = tab; 180 } 181 182 if (doit) 183 tab[msgindex].doit = doit; 184 185 if (dumpit) 186 tab[msgindex].dumpit = dumpit; 187 188 return 0; 189 } 190 EXPORT_SYMBOL_GPL(__rtnl_register); 191 192 /** 193 * rtnl_register - Register a rtnetlink message type 194 * 195 * Identical to __rtnl_register() but panics on failure. This is useful 196 * as failure of this function is very unlikely, it can only happen due 197 * to lack of memory when allocating the chain to store all message 198 * handlers for a protocol. Meant for use in init functions where lack 199 * of memory implies no sense in continuing. 200 */ 201 void rtnl_register(int protocol, int msgtype, 202 rtnl_doit_func doit, rtnl_dumpit_func dumpit) 203 { 204 if (__rtnl_register(protocol, msgtype, doit, dumpit) < 0) 205 panic("Unable to register rtnetlink message handler, " 206 "protocol = %d, message type = %d\n", 207 protocol, msgtype); 208 } 209 EXPORT_SYMBOL_GPL(rtnl_register); 210 211 /** 212 * rtnl_unregister - Unregister a rtnetlink message type 213 * @protocol: Protocol family or PF_UNSPEC 214 * @msgtype: rtnetlink message type 215 * 216 * Returns 0 on success or a negative error code. 217 */ 218 int rtnl_unregister(int protocol, int msgtype) 219 { 220 int msgindex; 221 222 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 223 msgindex = rtm_msgindex(msgtype); 224 225 if (rtnl_msg_handlers[protocol] == NULL) 226 return -ENOENT; 227 228 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 229 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 230 231 return 0; 232 } 233 EXPORT_SYMBOL_GPL(rtnl_unregister); 234 235 /** 236 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 237 * @protocol : Protocol family or PF_UNSPEC 238 * 239 * Identical to calling rtnl_unregster() for all registered message types 240 * of a certain protocol family. 241 */ 242 void rtnl_unregister_all(int protocol) 243 { 244 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 245 246 kfree(rtnl_msg_handlers[protocol]); 247 rtnl_msg_handlers[protocol] = NULL; 248 } 249 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 250 251 static LIST_HEAD(link_ops); 252 253 /** 254 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 255 * @ops: struct rtnl_link_ops * to register 256 * 257 * The caller must hold the rtnl_mutex. This function should be used 258 * by drivers that create devices during module initialization. It 259 * must be called before registering the devices. 260 * 261 * Returns 0 on success or a negative error code. 262 */ 263 int __rtnl_link_register(struct rtnl_link_ops *ops) 264 { 265 if (!ops->dellink) 266 ops->dellink = unregister_netdevice_queue; 267 268 list_add_tail(&ops->list, &link_ops); 269 return 0; 270 } 271 EXPORT_SYMBOL_GPL(__rtnl_link_register); 272 273 /** 274 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 275 * @ops: struct rtnl_link_ops * to register 276 * 277 * Returns 0 on success or a negative error code. 278 */ 279 int rtnl_link_register(struct rtnl_link_ops *ops) 280 { 281 int err; 282 283 rtnl_lock(); 284 err = __rtnl_link_register(ops); 285 rtnl_unlock(); 286 return err; 287 } 288 EXPORT_SYMBOL_GPL(rtnl_link_register); 289 290 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 291 { 292 struct net_device *dev; 293 LIST_HEAD(list_kill); 294 295 for_each_netdev(net, dev) { 296 if (dev->rtnl_link_ops == ops) 297 ops->dellink(dev, &list_kill); 298 } 299 unregister_netdevice_many(&list_kill); 300 } 301 302 /** 303 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 304 * @ops: struct rtnl_link_ops * to unregister 305 * 306 * The caller must hold the rtnl_mutex. 307 */ 308 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 309 { 310 struct net *net; 311 312 for_each_net(net) { 313 __rtnl_kill_links(net, ops); 314 } 315 list_del(&ops->list); 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 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 330 331 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 332 { 333 const struct rtnl_link_ops *ops; 334 335 list_for_each_entry(ops, &link_ops, list) { 336 if (!strcmp(ops->kind, kind)) 337 return ops; 338 } 339 return NULL; 340 } 341 342 static size_t rtnl_link_get_size(const struct net_device *dev) 343 { 344 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 345 size_t size; 346 347 if (!ops) 348 return 0; 349 350 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 351 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 352 353 if (ops->get_size) 354 /* IFLA_INFO_DATA + nested data */ 355 size += nla_total_size(sizeof(struct nlattr)) + 356 ops->get_size(dev); 357 358 if (ops->get_xstats_size) 359 /* IFLA_INFO_XSTATS */ 360 size += nla_total_size(ops->get_xstats_size(dev)); 361 362 return size; 363 } 364 365 static LIST_HEAD(rtnl_af_ops); 366 367 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 368 { 369 const struct rtnl_af_ops *ops; 370 371 list_for_each_entry(ops, &rtnl_af_ops, list) { 372 if (ops->family == family) 373 return ops; 374 } 375 376 return NULL; 377 } 378 379 /** 380 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink. 381 * @ops: struct rtnl_af_ops * to register 382 * 383 * The caller must hold the rtnl_mutex. 384 * 385 * Returns 0 on success or a negative error code. 386 */ 387 int __rtnl_af_register(struct rtnl_af_ops *ops) 388 { 389 list_add_tail(&ops->list, &rtnl_af_ops); 390 return 0; 391 } 392 EXPORT_SYMBOL_GPL(__rtnl_af_register); 393 394 /** 395 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 396 * @ops: struct rtnl_af_ops * to register 397 * 398 * Returns 0 on success or a negative error code. 399 */ 400 int rtnl_af_register(struct rtnl_af_ops *ops) 401 { 402 int err; 403 404 rtnl_lock(); 405 err = __rtnl_af_register(ops); 406 rtnl_unlock(); 407 return err; 408 } 409 EXPORT_SYMBOL_GPL(rtnl_af_register); 410 411 /** 412 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 413 * @ops: struct rtnl_af_ops * to unregister 414 * 415 * The caller must hold the rtnl_mutex. 416 */ 417 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 418 { 419 list_del(&ops->list); 420 } 421 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 422 423 /** 424 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 425 * @ops: struct rtnl_af_ops * to unregister 426 */ 427 void rtnl_af_unregister(struct rtnl_af_ops *ops) 428 { 429 rtnl_lock(); 430 __rtnl_af_unregister(ops); 431 rtnl_unlock(); 432 } 433 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 434 435 static size_t rtnl_link_get_af_size(const struct net_device *dev) 436 { 437 struct rtnl_af_ops *af_ops; 438 size_t size; 439 440 /* IFLA_AF_SPEC */ 441 size = nla_total_size(sizeof(struct nlattr)); 442 443 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 444 if (af_ops->get_link_af_size) { 445 /* AF_* + nested data */ 446 size += nla_total_size(sizeof(struct nlattr)) + 447 af_ops->get_link_af_size(dev); 448 } 449 } 450 451 return size; 452 } 453 454 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 455 { 456 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 457 struct nlattr *linkinfo, *data; 458 int err = -EMSGSIZE; 459 460 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 461 if (linkinfo == NULL) 462 goto out; 463 464 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 465 goto err_cancel_link; 466 if (ops->fill_xstats) { 467 err = ops->fill_xstats(skb, dev); 468 if (err < 0) 469 goto err_cancel_link; 470 } 471 if (ops->fill_info) { 472 data = nla_nest_start(skb, IFLA_INFO_DATA); 473 if (data == NULL) 474 goto err_cancel_link; 475 err = ops->fill_info(skb, dev); 476 if (err < 0) 477 goto err_cancel_data; 478 nla_nest_end(skb, data); 479 } 480 481 nla_nest_end(skb, linkinfo); 482 return 0; 483 484 err_cancel_data: 485 nla_nest_cancel(skb, data); 486 err_cancel_link: 487 nla_nest_cancel(skb, linkinfo); 488 out: 489 return err; 490 } 491 492 static const int rtm_min[RTM_NR_FAMILIES] = 493 { 494 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), 495 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), 496 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), 497 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), 498 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 499 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 500 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 501 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), 502 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 503 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 504 }; 505 506 static const int rta_max[RTM_NR_FAMILIES] = 507 { 508 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, 509 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, 510 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, 511 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, 512 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, 513 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, 514 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, 515 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, 516 }; 517 518 void __rta_fill(struct sk_buff *skb, int attrtype, int attrlen, const void *data) 519 { 520 struct rtattr *rta; 521 int size = RTA_LENGTH(attrlen); 522 523 rta = (struct rtattr *)skb_put(skb, RTA_ALIGN(size)); 524 rta->rta_type = attrtype; 525 rta->rta_len = size; 526 memcpy(RTA_DATA(rta), data, attrlen); 527 memset(RTA_DATA(rta) + attrlen, 0, RTA_ALIGN(size) - size); 528 } 529 EXPORT_SYMBOL(__rta_fill); 530 531 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned group, int echo) 532 { 533 struct sock *rtnl = net->rtnl; 534 int err = 0; 535 536 NETLINK_CB(skb).dst_group = group; 537 if (echo) 538 atomic_inc(&skb->users); 539 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 540 if (echo) 541 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 542 return err; 543 } 544 545 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 546 { 547 struct sock *rtnl = net->rtnl; 548 549 return nlmsg_unicast(rtnl, skb, pid); 550 } 551 EXPORT_SYMBOL(rtnl_unicast); 552 553 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 554 struct nlmsghdr *nlh, gfp_t flags) 555 { 556 struct sock *rtnl = net->rtnl; 557 int report = 0; 558 559 if (nlh) 560 report = nlmsg_report(nlh); 561 562 nlmsg_notify(rtnl, skb, pid, group, report, flags); 563 } 564 EXPORT_SYMBOL(rtnl_notify); 565 566 void rtnl_set_sk_err(struct net *net, u32 group, int error) 567 { 568 struct sock *rtnl = net->rtnl; 569 570 netlink_set_err(rtnl, 0, group, error); 571 } 572 EXPORT_SYMBOL(rtnl_set_sk_err); 573 574 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 575 { 576 struct nlattr *mx; 577 int i, valid = 0; 578 579 mx = nla_nest_start(skb, RTA_METRICS); 580 if (mx == NULL) 581 return -ENOBUFS; 582 583 for (i = 0; i < RTAX_MAX; i++) { 584 if (metrics[i]) { 585 valid++; 586 NLA_PUT_U32(skb, i+1, metrics[i]); 587 } 588 } 589 590 if (!valid) { 591 nla_nest_cancel(skb, mx); 592 return 0; 593 } 594 595 return nla_nest_end(skb, mx); 596 597 nla_put_failure: 598 nla_nest_cancel(skb, mx); 599 return -EMSGSIZE; 600 } 601 EXPORT_SYMBOL(rtnetlink_put_metrics); 602 603 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 604 u32 ts, u32 tsage, long expires, u32 error) 605 { 606 struct rta_cacheinfo ci = { 607 .rta_lastuse = jiffies_to_clock_t(jiffies - dst->lastuse), 608 .rta_used = dst->__use, 609 .rta_clntref = atomic_read(&(dst->__refcnt)), 610 .rta_error = error, 611 .rta_id = id, 612 .rta_ts = ts, 613 .rta_tsage = tsage, 614 }; 615 616 if (expires) 617 ci.rta_expires = jiffies_to_clock_t(expires); 618 619 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 620 } 621 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 622 623 static void set_operstate(struct net_device *dev, unsigned char transition) 624 { 625 unsigned char operstate = dev->operstate; 626 627 switch (transition) { 628 case IF_OPER_UP: 629 if ((operstate == IF_OPER_DORMANT || 630 operstate == IF_OPER_UNKNOWN) && 631 !netif_dormant(dev)) 632 operstate = IF_OPER_UP; 633 break; 634 635 case IF_OPER_DORMANT: 636 if (operstate == IF_OPER_UP || 637 operstate == IF_OPER_UNKNOWN) 638 operstate = IF_OPER_DORMANT; 639 break; 640 } 641 642 if (dev->operstate != operstate) { 643 write_lock_bh(&dev_base_lock); 644 dev->operstate = operstate; 645 write_unlock_bh(&dev_base_lock); 646 netdev_state_change(dev); 647 } 648 } 649 650 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 651 const struct ifinfomsg *ifm) 652 { 653 unsigned int flags = ifm->ifi_flags; 654 655 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 656 if (ifm->ifi_change) 657 flags = (flags & ifm->ifi_change) | 658 (dev->flags & ~ifm->ifi_change); 659 660 return flags; 661 } 662 663 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 664 const struct rtnl_link_stats64 *b) 665 { 666 a->rx_packets = b->rx_packets; 667 a->tx_packets = b->tx_packets; 668 a->rx_bytes = b->rx_bytes; 669 a->tx_bytes = b->tx_bytes; 670 a->rx_errors = b->rx_errors; 671 a->tx_errors = b->tx_errors; 672 a->rx_dropped = b->rx_dropped; 673 a->tx_dropped = b->tx_dropped; 674 675 a->multicast = b->multicast; 676 a->collisions = b->collisions; 677 678 a->rx_length_errors = b->rx_length_errors; 679 a->rx_over_errors = b->rx_over_errors; 680 a->rx_crc_errors = b->rx_crc_errors; 681 a->rx_frame_errors = b->rx_frame_errors; 682 a->rx_fifo_errors = b->rx_fifo_errors; 683 a->rx_missed_errors = b->rx_missed_errors; 684 685 a->tx_aborted_errors = b->tx_aborted_errors; 686 a->tx_carrier_errors = b->tx_carrier_errors; 687 a->tx_fifo_errors = b->tx_fifo_errors; 688 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 689 a->tx_window_errors = b->tx_window_errors; 690 691 a->rx_compressed = b->rx_compressed; 692 a->tx_compressed = b->tx_compressed; 693 } 694 695 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) 696 { 697 memcpy(v, b, sizeof(*b)); 698 } 699 700 /* All VF info */ 701 static inline int rtnl_vfinfo_size(const struct net_device *dev) 702 { 703 if (dev->dev.parent && dev_is_pci(dev->dev.parent)) { 704 705 int num_vfs = dev_num_vf(dev->dev.parent); 706 size_t size = nla_total_size(sizeof(struct nlattr)); 707 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 708 size += num_vfs * 709 (nla_total_size(sizeof(struct ifla_vf_mac)) + 710 nla_total_size(sizeof(struct ifla_vf_vlan)) + 711 nla_total_size(sizeof(struct ifla_vf_tx_rate))); 712 return size; 713 } else 714 return 0; 715 } 716 717 static size_t rtnl_port_size(const struct net_device *dev) 718 { 719 size_t port_size = nla_total_size(4) /* PORT_VF */ 720 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 721 + nla_total_size(sizeof(struct ifla_port_vsi)) 722 /* PORT_VSI_TYPE */ 723 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 724 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 725 + nla_total_size(1) /* PROT_VDP_REQUEST */ 726 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 727 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 728 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 729 + port_size; 730 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 731 + port_size; 732 733 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) 734 return 0; 735 if (dev_num_vf(dev->dev.parent)) 736 return port_self_size + vf_ports_size + 737 vf_port_size * dev_num_vf(dev->dev.parent); 738 else 739 return port_self_size; 740 } 741 742 static noinline size_t if_nlmsg_size(const struct net_device *dev) 743 { 744 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 745 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 746 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 747 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 748 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 749 + nla_total_size(sizeof(struct rtnl_link_stats)) 750 + nla_total_size(sizeof(struct rtnl_link_stats64)) 751 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 752 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 753 + nla_total_size(4) /* IFLA_TXQLEN */ 754 + nla_total_size(4) /* IFLA_WEIGHT */ 755 + nla_total_size(4) /* IFLA_MTU */ 756 + nla_total_size(4) /* IFLA_LINK */ 757 + nla_total_size(4) /* IFLA_MASTER */ 758 + nla_total_size(1) /* IFLA_OPERSTATE */ 759 + nla_total_size(1) /* IFLA_LINKMODE */ 760 + nla_total_size(4) /* IFLA_NUM_VF */ 761 + rtnl_vfinfo_size(dev) /* IFLA_VFINFO_LIST */ 762 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 763 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 764 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */ 765 } 766 767 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 768 { 769 struct nlattr *vf_ports; 770 struct nlattr *vf_port; 771 int vf; 772 int err; 773 774 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 775 if (!vf_ports) 776 return -EMSGSIZE; 777 778 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 779 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 780 if (!vf_port) 781 goto nla_put_failure; 782 NLA_PUT_U32(skb, IFLA_PORT_VF, vf); 783 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 784 if (err == -EMSGSIZE) 785 goto nla_put_failure; 786 if (err) { 787 nla_nest_cancel(skb, vf_port); 788 continue; 789 } 790 nla_nest_end(skb, vf_port); 791 } 792 793 nla_nest_end(skb, vf_ports); 794 795 return 0; 796 797 nla_put_failure: 798 nla_nest_cancel(skb, vf_ports); 799 return -EMSGSIZE; 800 } 801 802 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 803 { 804 struct nlattr *port_self; 805 int err; 806 807 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 808 if (!port_self) 809 return -EMSGSIZE; 810 811 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 812 if (err) { 813 nla_nest_cancel(skb, port_self); 814 return (err == -EMSGSIZE) ? err : 0; 815 } 816 817 nla_nest_end(skb, port_self); 818 819 return 0; 820 } 821 822 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev) 823 { 824 int err; 825 826 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) 827 return 0; 828 829 err = rtnl_port_self_fill(skb, dev); 830 if (err) 831 return err; 832 833 if (dev_num_vf(dev->dev.parent)) { 834 err = rtnl_vf_ports_fill(skb, dev); 835 if (err) 836 return err; 837 } 838 839 return 0; 840 } 841 842 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 843 int type, u32 pid, u32 seq, u32 change, 844 unsigned int flags) 845 { 846 struct ifinfomsg *ifm; 847 struct nlmsghdr *nlh; 848 struct rtnl_link_stats64 temp; 849 const struct rtnl_link_stats64 *stats; 850 struct nlattr *attr, *af_spec; 851 struct rtnl_af_ops *af_ops; 852 853 ASSERT_RTNL(); 854 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 855 if (nlh == NULL) 856 return -EMSGSIZE; 857 858 ifm = nlmsg_data(nlh); 859 ifm->ifi_family = AF_UNSPEC; 860 ifm->__ifi_pad = 0; 861 ifm->ifi_type = dev->type; 862 ifm->ifi_index = dev->ifindex; 863 ifm->ifi_flags = dev_get_flags(dev); 864 ifm->ifi_change = change; 865 866 NLA_PUT_STRING(skb, IFLA_IFNAME, dev->name); 867 NLA_PUT_U32(skb, IFLA_TXQLEN, dev->tx_queue_len); 868 NLA_PUT_U8(skb, IFLA_OPERSTATE, 869 netif_running(dev) ? dev->operstate : IF_OPER_DOWN); 870 NLA_PUT_U8(skb, IFLA_LINKMODE, dev->link_mode); 871 NLA_PUT_U32(skb, IFLA_MTU, dev->mtu); 872 NLA_PUT_U32(skb, IFLA_GROUP, dev->group); 873 874 if (dev->ifindex != dev->iflink) 875 NLA_PUT_U32(skb, IFLA_LINK, dev->iflink); 876 877 if (dev->master) 878 NLA_PUT_U32(skb, IFLA_MASTER, dev->master->ifindex); 879 880 if (dev->qdisc) 881 NLA_PUT_STRING(skb, IFLA_QDISC, dev->qdisc->ops->id); 882 883 if (dev->ifalias) 884 NLA_PUT_STRING(skb, IFLA_IFALIAS, dev->ifalias); 885 886 if (1) { 887 struct rtnl_link_ifmap map = { 888 .mem_start = dev->mem_start, 889 .mem_end = dev->mem_end, 890 .base_addr = dev->base_addr, 891 .irq = dev->irq, 892 .dma = dev->dma, 893 .port = dev->if_port, 894 }; 895 NLA_PUT(skb, IFLA_MAP, sizeof(map), &map); 896 } 897 898 if (dev->addr_len) { 899 NLA_PUT(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr); 900 NLA_PUT(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast); 901 } 902 903 attr = nla_reserve(skb, IFLA_STATS, 904 sizeof(struct rtnl_link_stats)); 905 if (attr == NULL) 906 goto nla_put_failure; 907 908 stats = dev_get_stats(dev, &temp); 909 copy_rtnl_link_stats(nla_data(attr), stats); 910 911 attr = nla_reserve(skb, IFLA_STATS64, 912 sizeof(struct rtnl_link_stats64)); 913 if (attr == NULL) 914 goto nla_put_failure; 915 copy_rtnl_link_stats64(nla_data(attr), stats); 916 917 if (dev->dev.parent) 918 NLA_PUT_U32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent)); 919 920 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent) { 921 int i; 922 923 struct nlattr *vfinfo, *vf; 924 int num_vfs = dev_num_vf(dev->dev.parent); 925 926 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 927 if (!vfinfo) 928 goto nla_put_failure; 929 for (i = 0; i < num_vfs; i++) { 930 struct ifla_vf_info ivi; 931 struct ifla_vf_mac vf_mac; 932 struct ifla_vf_vlan vf_vlan; 933 struct ifla_vf_tx_rate vf_tx_rate; 934 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) 935 break; 936 vf_mac.vf = vf_vlan.vf = vf_tx_rate.vf = ivi.vf; 937 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 938 vf_vlan.vlan = ivi.vlan; 939 vf_vlan.qos = ivi.qos; 940 vf_tx_rate.rate = ivi.tx_rate; 941 vf = nla_nest_start(skb, IFLA_VF_INFO); 942 if (!vf) { 943 nla_nest_cancel(skb, vfinfo); 944 goto nla_put_failure; 945 } 946 NLA_PUT(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac); 947 NLA_PUT(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan); 948 NLA_PUT(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), &vf_tx_rate); 949 nla_nest_end(skb, vf); 950 } 951 nla_nest_end(skb, vfinfo); 952 } 953 954 if (rtnl_port_fill(skb, dev)) 955 goto nla_put_failure; 956 957 if (dev->rtnl_link_ops) { 958 if (rtnl_link_fill(skb, dev) < 0) 959 goto nla_put_failure; 960 } 961 962 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 963 goto nla_put_failure; 964 965 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 966 if (af_ops->fill_link_af) { 967 struct nlattr *af; 968 int err; 969 970 if (!(af = nla_nest_start(skb, af_ops->family))) 971 goto nla_put_failure; 972 973 err = af_ops->fill_link_af(skb, dev); 974 975 /* 976 * Caller may return ENODATA to indicate that there 977 * was no data to be dumped. This is not an error, it 978 * means we should trim the attribute header and 979 * continue. 980 */ 981 if (err == -ENODATA) 982 nla_nest_cancel(skb, af); 983 else if (err < 0) 984 goto nla_put_failure; 985 986 nla_nest_end(skb, af); 987 } 988 } 989 990 nla_nest_end(skb, af_spec); 991 992 return nlmsg_end(skb, nlh); 993 994 nla_put_failure: 995 nlmsg_cancel(skb, nlh); 996 return -EMSGSIZE; 997 } 998 999 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1000 { 1001 struct net *net = sock_net(skb->sk); 1002 int h, s_h; 1003 int idx = 0, s_idx; 1004 struct net_device *dev; 1005 struct hlist_head *head; 1006 struct hlist_node *node; 1007 1008 s_h = cb->args[0]; 1009 s_idx = cb->args[1]; 1010 1011 rcu_read_lock(); 1012 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1013 idx = 0; 1014 head = &net->dev_index_head[h]; 1015 hlist_for_each_entry_rcu(dev, node, head, index_hlist) { 1016 if (idx < s_idx) 1017 goto cont; 1018 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1019 NETLINK_CB(cb->skb).pid, 1020 cb->nlh->nlmsg_seq, 0, 1021 NLM_F_MULTI) <= 0) 1022 goto out; 1023 cont: 1024 idx++; 1025 } 1026 } 1027 out: 1028 rcu_read_unlock(); 1029 cb->args[1] = idx; 1030 cb->args[0] = h; 1031 1032 return skb->len; 1033 } 1034 1035 const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1036 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1037 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1038 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1039 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1040 [IFLA_MTU] = { .type = NLA_U32 }, 1041 [IFLA_LINK] = { .type = NLA_U32 }, 1042 [IFLA_MASTER] = { .type = NLA_U32 }, 1043 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1044 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1045 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1046 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1047 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1048 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1049 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1050 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1051 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1052 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1053 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1054 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1055 }; 1056 EXPORT_SYMBOL(ifla_policy); 1057 1058 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1059 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1060 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1061 }; 1062 1063 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { 1064 [IFLA_VF_INFO] = { .type = NLA_NESTED }, 1065 }; 1066 1067 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1068 [IFLA_VF_MAC] = { .type = NLA_BINARY, 1069 .len = sizeof(struct ifla_vf_mac) }, 1070 [IFLA_VF_VLAN] = { .type = NLA_BINARY, 1071 .len = sizeof(struct ifla_vf_vlan) }, 1072 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, 1073 .len = sizeof(struct ifla_vf_tx_rate) }, 1074 }; 1075 1076 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1077 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1078 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1079 .len = PORT_PROFILE_MAX }, 1080 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1081 .len = sizeof(struct ifla_port_vsi)}, 1082 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1083 .len = PORT_UUID_MAX }, 1084 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1085 .len = PORT_UUID_MAX }, 1086 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1087 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1088 }; 1089 1090 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1091 { 1092 struct net *net; 1093 /* Examine the link attributes and figure out which 1094 * network namespace we are talking about. 1095 */ 1096 if (tb[IFLA_NET_NS_PID]) 1097 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1098 else if (tb[IFLA_NET_NS_FD]) 1099 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1100 else 1101 net = get_net(src_net); 1102 return net; 1103 } 1104 EXPORT_SYMBOL(rtnl_link_get_net); 1105 1106 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1107 { 1108 if (dev) { 1109 if (tb[IFLA_ADDRESS] && 1110 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1111 return -EINVAL; 1112 1113 if (tb[IFLA_BROADCAST] && 1114 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1115 return -EINVAL; 1116 } 1117 1118 if (tb[IFLA_AF_SPEC]) { 1119 struct nlattr *af; 1120 int rem, err; 1121 1122 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1123 const struct rtnl_af_ops *af_ops; 1124 1125 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1126 return -EAFNOSUPPORT; 1127 1128 if (!af_ops->set_link_af) 1129 return -EOPNOTSUPP; 1130 1131 if (af_ops->validate_link_af) { 1132 err = af_ops->validate_link_af(dev, af); 1133 if (err < 0) 1134 return err; 1135 } 1136 } 1137 } 1138 1139 return 0; 1140 } 1141 1142 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) 1143 { 1144 int rem, err = -EINVAL; 1145 struct nlattr *vf; 1146 const struct net_device_ops *ops = dev->netdev_ops; 1147 1148 nla_for_each_nested(vf, attr, rem) { 1149 switch (nla_type(vf)) { 1150 case IFLA_VF_MAC: { 1151 struct ifla_vf_mac *ivm; 1152 ivm = nla_data(vf); 1153 err = -EOPNOTSUPP; 1154 if (ops->ndo_set_vf_mac) 1155 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1156 ivm->mac); 1157 break; 1158 } 1159 case IFLA_VF_VLAN: { 1160 struct ifla_vf_vlan *ivv; 1161 ivv = nla_data(vf); 1162 err = -EOPNOTSUPP; 1163 if (ops->ndo_set_vf_vlan) 1164 err = ops->ndo_set_vf_vlan(dev, ivv->vf, 1165 ivv->vlan, 1166 ivv->qos); 1167 break; 1168 } 1169 case IFLA_VF_TX_RATE: { 1170 struct ifla_vf_tx_rate *ivt; 1171 ivt = nla_data(vf); 1172 err = -EOPNOTSUPP; 1173 if (ops->ndo_set_vf_tx_rate) 1174 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, 1175 ivt->rate); 1176 break; 1177 } 1178 default: 1179 err = -EINVAL; 1180 break; 1181 } 1182 if (err) 1183 break; 1184 } 1185 return err; 1186 } 1187 1188 static int do_set_master(struct net_device *dev, int ifindex) 1189 { 1190 struct net_device *master_dev; 1191 const struct net_device_ops *ops; 1192 int err; 1193 1194 if (dev->master) { 1195 if (dev->master->ifindex == ifindex) 1196 return 0; 1197 ops = dev->master->netdev_ops; 1198 if (ops->ndo_del_slave) { 1199 err = ops->ndo_del_slave(dev->master, dev); 1200 if (err) 1201 return err; 1202 } else { 1203 return -EOPNOTSUPP; 1204 } 1205 } 1206 1207 if (ifindex) { 1208 master_dev = __dev_get_by_index(dev_net(dev), ifindex); 1209 if (!master_dev) 1210 return -EINVAL; 1211 ops = master_dev->netdev_ops; 1212 if (ops->ndo_add_slave) { 1213 err = ops->ndo_add_slave(master_dev, dev); 1214 if (err) 1215 return err; 1216 } else { 1217 return -EOPNOTSUPP; 1218 } 1219 } 1220 return 0; 1221 } 1222 1223 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, 1224 struct nlattr **tb, char *ifname, int modified) 1225 { 1226 const struct net_device_ops *ops = dev->netdev_ops; 1227 int send_addr_notify = 0; 1228 int err; 1229 1230 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1231 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1232 if (IS_ERR(net)) { 1233 err = PTR_ERR(net); 1234 goto errout; 1235 } 1236 err = dev_change_net_namespace(dev, net, ifname); 1237 put_net(net); 1238 if (err) 1239 goto errout; 1240 modified = 1; 1241 } 1242 1243 if (tb[IFLA_MAP]) { 1244 struct rtnl_link_ifmap *u_map; 1245 struct ifmap k_map; 1246 1247 if (!ops->ndo_set_config) { 1248 err = -EOPNOTSUPP; 1249 goto errout; 1250 } 1251 1252 if (!netif_device_present(dev)) { 1253 err = -ENODEV; 1254 goto errout; 1255 } 1256 1257 u_map = nla_data(tb[IFLA_MAP]); 1258 k_map.mem_start = (unsigned long) u_map->mem_start; 1259 k_map.mem_end = (unsigned long) u_map->mem_end; 1260 k_map.base_addr = (unsigned short) u_map->base_addr; 1261 k_map.irq = (unsigned char) u_map->irq; 1262 k_map.dma = (unsigned char) u_map->dma; 1263 k_map.port = (unsigned char) u_map->port; 1264 1265 err = ops->ndo_set_config(dev, &k_map); 1266 if (err < 0) 1267 goto errout; 1268 1269 modified = 1; 1270 } 1271 1272 if (tb[IFLA_ADDRESS]) { 1273 struct sockaddr *sa; 1274 int len; 1275 1276 if (!ops->ndo_set_mac_address) { 1277 err = -EOPNOTSUPP; 1278 goto errout; 1279 } 1280 1281 if (!netif_device_present(dev)) { 1282 err = -ENODEV; 1283 goto errout; 1284 } 1285 1286 len = sizeof(sa_family_t) + dev->addr_len; 1287 sa = kmalloc(len, GFP_KERNEL); 1288 if (!sa) { 1289 err = -ENOMEM; 1290 goto errout; 1291 } 1292 sa->sa_family = dev->type; 1293 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1294 dev->addr_len); 1295 err = ops->ndo_set_mac_address(dev, sa); 1296 kfree(sa); 1297 if (err) 1298 goto errout; 1299 send_addr_notify = 1; 1300 modified = 1; 1301 } 1302 1303 if (tb[IFLA_MTU]) { 1304 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1305 if (err < 0) 1306 goto errout; 1307 modified = 1; 1308 } 1309 1310 if (tb[IFLA_GROUP]) { 1311 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1312 modified = 1; 1313 } 1314 1315 /* 1316 * Interface selected by interface index but interface 1317 * name provided implies that a name change has been 1318 * requested. 1319 */ 1320 if (ifm->ifi_index > 0 && ifname[0]) { 1321 err = dev_change_name(dev, ifname); 1322 if (err < 0) 1323 goto errout; 1324 modified = 1; 1325 } 1326 1327 if (tb[IFLA_IFALIAS]) { 1328 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1329 nla_len(tb[IFLA_IFALIAS])); 1330 if (err < 0) 1331 goto errout; 1332 modified = 1; 1333 } 1334 1335 if (tb[IFLA_BROADCAST]) { 1336 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1337 send_addr_notify = 1; 1338 } 1339 1340 if (ifm->ifi_flags || ifm->ifi_change) { 1341 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1342 if (err < 0) 1343 goto errout; 1344 } 1345 1346 if (tb[IFLA_MASTER]) { 1347 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1348 if (err) 1349 goto errout; 1350 modified = 1; 1351 } 1352 1353 if (tb[IFLA_TXQLEN]) 1354 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1355 1356 if (tb[IFLA_OPERSTATE]) 1357 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1358 1359 if (tb[IFLA_LINKMODE]) { 1360 write_lock_bh(&dev_base_lock); 1361 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1362 write_unlock_bh(&dev_base_lock); 1363 } 1364 1365 if (tb[IFLA_VFINFO_LIST]) { 1366 struct nlattr *attr; 1367 int rem; 1368 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1369 if (nla_type(attr) != IFLA_VF_INFO) { 1370 err = -EINVAL; 1371 goto errout; 1372 } 1373 err = do_setvfinfo(dev, attr); 1374 if (err < 0) 1375 goto errout; 1376 modified = 1; 1377 } 1378 } 1379 err = 0; 1380 1381 if (tb[IFLA_VF_PORTS]) { 1382 struct nlattr *port[IFLA_PORT_MAX+1]; 1383 struct nlattr *attr; 1384 int vf; 1385 int rem; 1386 1387 err = -EOPNOTSUPP; 1388 if (!ops->ndo_set_vf_port) 1389 goto errout; 1390 1391 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1392 if (nla_type(attr) != IFLA_VF_PORT) 1393 continue; 1394 err = nla_parse_nested(port, IFLA_PORT_MAX, 1395 attr, ifla_port_policy); 1396 if (err < 0) 1397 goto errout; 1398 if (!port[IFLA_PORT_VF]) { 1399 err = -EOPNOTSUPP; 1400 goto errout; 1401 } 1402 vf = nla_get_u32(port[IFLA_PORT_VF]); 1403 err = ops->ndo_set_vf_port(dev, vf, port); 1404 if (err < 0) 1405 goto errout; 1406 modified = 1; 1407 } 1408 } 1409 err = 0; 1410 1411 if (tb[IFLA_PORT_SELF]) { 1412 struct nlattr *port[IFLA_PORT_MAX+1]; 1413 1414 err = nla_parse_nested(port, IFLA_PORT_MAX, 1415 tb[IFLA_PORT_SELF], ifla_port_policy); 1416 if (err < 0) 1417 goto errout; 1418 1419 err = -EOPNOTSUPP; 1420 if (ops->ndo_set_vf_port) 1421 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1422 if (err < 0) 1423 goto errout; 1424 modified = 1; 1425 } 1426 1427 if (tb[IFLA_AF_SPEC]) { 1428 struct nlattr *af; 1429 int rem; 1430 1431 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1432 const struct rtnl_af_ops *af_ops; 1433 1434 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1435 BUG(); 1436 1437 err = af_ops->set_link_af(dev, af); 1438 if (err < 0) 1439 goto errout; 1440 1441 modified = 1; 1442 } 1443 } 1444 err = 0; 1445 1446 errout: 1447 if (err < 0 && modified && net_ratelimit()) 1448 printk(KERN_WARNING "A link change request failed with " 1449 "some changes committed already. Interface %s may " 1450 "have been left with an inconsistent configuration, " 1451 "please check.\n", dev->name); 1452 1453 if (send_addr_notify) 1454 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1455 return err; 1456 } 1457 1458 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1459 { 1460 struct net *net = sock_net(skb->sk); 1461 struct ifinfomsg *ifm; 1462 struct net_device *dev; 1463 int err; 1464 struct nlattr *tb[IFLA_MAX+1]; 1465 char ifname[IFNAMSIZ]; 1466 1467 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1468 if (err < 0) 1469 goto errout; 1470 1471 if (tb[IFLA_IFNAME]) 1472 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1473 else 1474 ifname[0] = '\0'; 1475 1476 err = -EINVAL; 1477 ifm = nlmsg_data(nlh); 1478 if (ifm->ifi_index > 0) 1479 dev = __dev_get_by_index(net, ifm->ifi_index); 1480 else if (tb[IFLA_IFNAME]) 1481 dev = __dev_get_by_name(net, ifname); 1482 else 1483 goto errout; 1484 1485 if (dev == NULL) { 1486 err = -ENODEV; 1487 goto errout; 1488 } 1489 1490 err = validate_linkmsg(dev, tb); 1491 if (err < 0) 1492 goto errout; 1493 1494 err = do_setlink(dev, ifm, tb, ifname, 0); 1495 errout: 1496 return err; 1497 } 1498 1499 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1500 { 1501 struct net *net = sock_net(skb->sk); 1502 const struct rtnl_link_ops *ops; 1503 struct net_device *dev; 1504 struct ifinfomsg *ifm; 1505 char ifname[IFNAMSIZ]; 1506 struct nlattr *tb[IFLA_MAX+1]; 1507 int err; 1508 LIST_HEAD(list_kill); 1509 1510 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1511 if (err < 0) 1512 return err; 1513 1514 if (tb[IFLA_IFNAME]) 1515 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1516 1517 ifm = nlmsg_data(nlh); 1518 if (ifm->ifi_index > 0) 1519 dev = __dev_get_by_index(net, ifm->ifi_index); 1520 else if (tb[IFLA_IFNAME]) 1521 dev = __dev_get_by_name(net, ifname); 1522 else 1523 return -EINVAL; 1524 1525 if (!dev) 1526 return -ENODEV; 1527 1528 ops = dev->rtnl_link_ops; 1529 if (!ops) 1530 return -EOPNOTSUPP; 1531 1532 ops->dellink(dev, &list_kill); 1533 unregister_netdevice_many(&list_kill); 1534 list_del(&list_kill); 1535 return 0; 1536 } 1537 1538 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 1539 { 1540 unsigned int old_flags; 1541 int err; 1542 1543 old_flags = dev->flags; 1544 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 1545 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1546 if (err < 0) 1547 return err; 1548 } 1549 1550 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 1551 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); 1552 1553 __dev_notify_flags(dev, old_flags); 1554 return 0; 1555 } 1556 EXPORT_SYMBOL(rtnl_configure_link); 1557 1558 struct net_device *rtnl_create_link(struct net *src_net, struct net *net, 1559 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]) 1560 { 1561 int err; 1562 struct net_device *dev; 1563 unsigned int num_queues = 1; 1564 unsigned int real_num_queues = 1; 1565 1566 if (ops->get_tx_queues) { 1567 err = ops->get_tx_queues(src_net, tb, &num_queues, 1568 &real_num_queues); 1569 if (err) 1570 goto err; 1571 } 1572 err = -ENOMEM; 1573 dev = alloc_netdev_mq(ops->priv_size, ifname, ops->setup, num_queues); 1574 if (!dev) 1575 goto err; 1576 1577 dev_net_set(dev, net); 1578 dev->rtnl_link_ops = ops; 1579 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 1580 dev->real_num_tx_queues = real_num_queues; 1581 1582 if (tb[IFLA_MTU]) 1583 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1584 if (tb[IFLA_ADDRESS]) 1585 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1586 nla_len(tb[IFLA_ADDRESS])); 1587 if (tb[IFLA_BROADCAST]) 1588 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1589 nla_len(tb[IFLA_BROADCAST])); 1590 if (tb[IFLA_TXQLEN]) 1591 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1592 if (tb[IFLA_OPERSTATE]) 1593 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1594 if (tb[IFLA_LINKMODE]) 1595 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1596 if (tb[IFLA_GROUP]) 1597 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1598 1599 return dev; 1600 1601 err: 1602 return ERR_PTR(err); 1603 } 1604 EXPORT_SYMBOL(rtnl_create_link); 1605 1606 static int rtnl_group_changelink(struct net *net, int group, 1607 struct ifinfomsg *ifm, 1608 struct nlattr **tb) 1609 { 1610 struct net_device *dev; 1611 int err; 1612 1613 for_each_netdev(net, dev) { 1614 if (dev->group == group) { 1615 err = do_setlink(dev, ifm, tb, NULL, 0); 1616 if (err < 0) 1617 return err; 1618 } 1619 } 1620 1621 return 0; 1622 } 1623 1624 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1625 { 1626 struct net *net = sock_net(skb->sk); 1627 const struct rtnl_link_ops *ops; 1628 struct net_device *dev; 1629 struct ifinfomsg *ifm; 1630 char kind[MODULE_NAME_LEN]; 1631 char ifname[IFNAMSIZ]; 1632 struct nlattr *tb[IFLA_MAX+1]; 1633 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 1634 int err; 1635 1636 #ifdef CONFIG_MODULES 1637 replay: 1638 #endif 1639 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1640 if (err < 0) 1641 return err; 1642 1643 if (tb[IFLA_IFNAME]) 1644 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1645 else 1646 ifname[0] = '\0'; 1647 1648 ifm = nlmsg_data(nlh); 1649 if (ifm->ifi_index > 0) 1650 dev = __dev_get_by_index(net, ifm->ifi_index); 1651 else { 1652 if (ifname[0]) 1653 dev = __dev_get_by_name(net, ifname); 1654 else 1655 dev = NULL; 1656 } 1657 1658 err = validate_linkmsg(dev, tb); 1659 if (err < 0) 1660 return err; 1661 1662 if (tb[IFLA_LINKINFO]) { 1663 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 1664 tb[IFLA_LINKINFO], ifla_info_policy); 1665 if (err < 0) 1666 return err; 1667 } else 1668 memset(linkinfo, 0, sizeof(linkinfo)); 1669 1670 if (linkinfo[IFLA_INFO_KIND]) { 1671 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 1672 ops = rtnl_link_ops_get(kind); 1673 } else { 1674 kind[0] = '\0'; 1675 ops = NULL; 1676 } 1677 1678 if (1) { 1679 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; 1680 struct net *dest_net; 1681 1682 if (ops) { 1683 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 1684 err = nla_parse_nested(attr, ops->maxtype, 1685 linkinfo[IFLA_INFO_DATA], 1686 ops->policy); 1687 if (err < 0) 1688 return err; 1689 data = attr; 1690 } 1691 if (ops->validate) { 1692 err = ops->validate(tb, data); 1693 if (err < 0) 1694 return err; 1695 } 1696 } 1697 1698 if (dev) { 1699 int modified = 0; 1700 1701 if (nlh->nlmsg_flags & NLM_F_EXCL) 1702 return -EEXIST; 1703 if (nlh->nlmsg_flags & NLM_F_REPLACE) 1704 return -EOPNOTSUPP; 1705 1706 if (linkinfo[IFLA_INFO_DATA]) { 1707 if (!ops || ops != dev->rtnl_link_ops || 1708 !ops->changelink) 1709 return -EOPNOTSUPP; 1710 1711 err = ops->changelink(dev, tb, data); 1712 if (err < 0) 1713 return err; 1714 modified = 1; 1715 } 1716 1717 return do_setlink(dev, ifm, tb, ifname, modified); 1718 } 1719 1720 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 1721 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 1722 return rtnl_group_changelink(net, 1723 nla_get_u32(tb[IFLA_GROUP]), 1724 ifm, tb); 1725 return -ENODEV; 1726 } 1727 1728 if (ifm->ifi_index) 1729 return -EOPNOTSUPP; 1730 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 1731 return -EOPNOTSUPP; 1732 1733 if (!ops) { 1734 #ifdef CONFIG_MODULES 1735 if (kind[0]) { 1736 __rtnl_unlock(); 1737 request_module("rtnl-link-%s", kind); 1738 rtnl_lock(); 1739 ops = rtnl_link_ops_get(kind); 1740 if (ops) 1741 goto replay; 1742 } 1743 #endif 1744 return -EOPNOTSUPP; 1745 } 1746 1747 if (!ifname[0]) 1748 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 1749 1750 dest_net = rtnl_link_get_net(net, tb); 1751 if (IS_ERR(dest_net)) 1752 return PTR_ERR(dest_net); 1753 1754 dev = rtnl_create_link(net, dest_net, ifname, ops, tb); 1755 1756 if (IS_ERR(dev)) 1757 err = PTR_ERR(dev); 1758 else if (ops->newlink) 1759 err = ops->newlink(net, dev, tb, data); 1760 else 1761 err = register_netdevice(dev); 1762 1763 if (err < 0 && !IS_ERR(dev)) 1764 free_netdev(dev); 1765 if (err < 0) 1766 goto out; 1767 1768 err = rtnl_configure_link(dev, ifm); 1769 if (err < 0) 1770 unregister_netdevice(dev); 1771 out: 1772 put_net(dest_net); 1773 return err; 1774 } 1775 } 1776 1777 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) 1778 { 1779 struct net *net = sock_net(skb->sk); 1780 struct ifinfomsg *ifm; 1781 char ifname[IFNAMSIZ]; 1782 struct nlattr *tb[IFLA_MAX+1]; 1783 struct net_device *dev = NULL; 1784 struct sk_buff *nskb; 1785 int err; 1786 1787 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1788 if (err < 0) 1789 return err; 1790 1791 if (tb[IFLA_IFNAME]) 1792 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1793 1794 ifm = nlmsg_data(nlh); 1795 if (ifm->ifi_index > 0) 1796 dev = __dev_get_by_index(net, ifm->ifi_index); 1797 else if (tb[IFLA_IFNAME]) 1798 dev = __dev_get_by_name(net, ifname); 1799 else 1800 return -EINVAL; 1801 1802 if (dev == NULL) 1803 return -ENODEV; 1804 1805 nskb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); 1806 if (nskb == NULL) 1807 return -ENOBUFS; 1808 1809 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).pid, 1810 nlh->nlmsg_seq, 0, 0); 1811 if (err < 0) { 1812 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 1813 WARN_ON(err == -EMSGSIZE); 1814 kfree_skb(nskb); 1815 } else 1816 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).pid); 1817 1818 return err; 1819 } 1820 1821 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 1822 { 1823 int idx; 1824 int s_idx = cb->family; 1825 1826 if (s_idx == 0) 1827 s_idx = 1; 1828 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 1829 int type = cb->nlh->nlmsg_type-RTM_BASE; 1830 if (idx < s_idx || idx == PF_PACKET) 1831 continue; 1832 if (rtnl_msg_handlers[idx] == NULL || 1833 rtnl_msg_handlers[idx][type].dumpit == NULL) 1834 continue; 1835 if (idx > s_idx) 1836 memset(&cb->args[0], 0, sizeof(cb->args)); 1837 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 1838 break; 1839 } 1840 cb->family = idx; 1841 1842 return skb->len; 1843 } 1844 1845 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned change) 1846 { 1847 struct net *net = dev_net(dev); 1848 struct sk_buff *skb; 1849 int err = -ENOBUFS; 1850 1851 skb = nlmsg_new(if_nlmsg_size(dev), GFP_KERNEL); 1852 if (skb == NULL) 1853 goto errout; 1854 1855 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0); 1856 if (err < 0) { 1857 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 1858 WARN_ON(err == -EMSGSIZE); 1859 kfree_skb(skb); 1860 goto errout; 1861 } 1862 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); 1863 return; 1864 errout: 1865 if (err < 0) 1866 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 1867 } 1868 1869 /* Protected by RTNL sempahore. */ 1870 static struct rtattr **rta_buf; 1871 static int rtattr_max; 1872 1873 /* Process one rtnetlink message. */ 1874 1875 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 1876 { 1877 struct net *net = sock_net(skb->sk); 1878 rtnl_doit_func doit; 1879 int sz_idx, kind; 1880 int min_len; 1881 int family; 1882 int type; 1883 int err; 1884 1885 type = nlh->nlmsg_type; 1886 if (type > RTM_MAX) 1887 return -EOPNOTSUPP; 1888 1889 type -= RTM_BASE; 1890 1891 /* All the messages must have at least 1 byte length */ 1892 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) 1893 return 0; 1894 1895 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family; 1896 sz_idx = type>>2; 1897 kind = type&3; 1898 1899 if (kind != 2 && security_netlink_recv(skb, CAP_NET_ADMIN)) 1900 return -EPERM; 1901 1902 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 1903 struct sock *rtnl; 1904 rtnl_dumpit_func dumpit; 1905 1906 dumpit = rtnl_get_dumpit(family, type); 1907 if (dumpit == NULL) 1908 return -EOPNOTSUPP; 1909 1910 __rtnl_unlock(); 1911 rtnl = net->rtnl; 1912 err = netlink_dump_start(rtnl, skb, nlh, dumpit, NULL); 1913 rtnl_lock(); 1914 return err; 1915 } 1916 1917 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); 1918 1919 min_len = rtm_min[sz_idx]; 1920 if (nlh->nlmsg_len < min_len) 1921 return -EINVAL; 1922 1923 if (nlh->nlmsg_len > min_len) { 1924 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 1925 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len); 1926 1927 while (RTA_OK(attr, attrlen)) { 1928 unsigned flavor = attr->rta_type; 1929 if (flavor) { 1930 if (flavor > rta_max[sz_idx]) 1931 return -EINVAL; 1932 rta_buf[flavor-1] = attr; 1933 } 1934 attr = RTA_NEXT(attr, attrlen); 1935 } 1936 } 1937 1938 doit = rtnl_get_doit(family, type); 1939 if (doit == NULL) 1940 return -EOPNOTSUPP; 1941 1942 return doit(skb, nlh, (void *)&rta_buf[0]); 1943 } 1944 1945 static void rtnetlink_rcv(struct sk_buff *skb) 1946 { 1947 rtnl_lock(); 1948 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 1949 rtnl_unlock(); 1950 } 1951 1952 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 1953 { 1954 struct net_device *dev = ptr; 1955 1956 switch (event) { 1957 case NETDEV_UP: 1958 case NETDEV_DOWN: 1959 case NETDEV_PRE_UP: 1960 case NETDEV_POST_INIT: 1961 case NETDEV_REGISTER: 1962 case NETDEV_CHANGE: 1963 case NETDEV_PRE_TYPE_CHANGE: 1964 case NETDEV_GOING_DOWN: 1965 case NETDEV_UNREGISTER: 1966 case NETDEV_UNREGISTER_BATCH: 1967 case NETDEV_RELEASE: 1968 case NETDEV_JOIN: 1969 break; 1970 default: 1971 rtmsg_ifinfo(RTM_NEWLINK, dev, 0); 1972 break; 1973 } 1974 return NOTIFY_DONE; 1975 } 1976 1977 static struct notifier_block rtnetlink_dev_notifier = { 1978 .notifier_call = rtnetlink_event, 1979 }; 1980 1981 1982 static int __net_init rtnetlink_net_init(struct net *net) 1983 { 1984 struct sock *sk; 1985 sk = netlink_kernel_create(net, NETLINK_ROUTE, RTNLGRP_MAX, 1986 rtnetlink_rcv, &rtnl_mutex, THIS_MODULE); 1987 if (!sk) 1988 return -ENOMEM; 1989 net->rtnl = sk; 1990 return 0; 1991 } 1992 1993 static void __net_exit rtnetlink_net_exit(struct net *net) 1994 { 1995 netlink_kernel_release(net->rtnl); 1996 net->rtnl = NULL; 1997 } 1998 1999 static struct pernet_operations rtnetlink_net_ops = { 2000 .init = rtnetlink_net_init, 2001 .exit = rtnetlink_net_exit, 2002 }; 2003 2004 void __init rtnetlink_init(void) 2005 { 2006 int i; 2007 2008 rtattr_max = 0; 2009 for (i = 0; i < ARRAY_SIZE(rta_max); i++) 2010 if (rta_max[i] > rtattr_max) 2011 rtattr_max = rta_max[i]; 2012 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); 2013 if (!rta_buf) 2014 panic("rtnetlink_init: cannot allocate rta_buf\n"); 2015 2016 if (register_pernet_subsys(&rtnetlink_net_ops)) 2017 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 2018 2019 netlink_set_nonroot(NETLINK_ROUTE, NL_NONROOT_RECV); 2020 register_netdevice_notifier(&rtnetlink_dev_notifier); 2021 2022 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, rtnl_dump_ifinfo); 2023 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL); 2024 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL); 2025 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL); 2026 2027 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all); 2028 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all); 2029 } 2030 2031