1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Routing netlink socket interface: protocol independent part. 7 * 8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 * 15 * Fixes: 16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong. 17 */ 18 19 #include <linux/errno.h> 20 #include <linux/module.h> 21 #include <linux/types.h> 22 #include <linux/socket.h> 23 #include <linux/kernel.h> 24 #include <linux/timer.h> 25 #include <linux/string.h> 26 #include <linux/sockios.h> 27 #include <linux/net.h> 28 #include <linux/fcntl.h> 29 #include <linux/mm.h> 30 #include <linux/slab.h> 31 #include <linux/interrupt.h> 32 #include <linux/capability.h> 33 #include <linux/skbuff.h> 34 #include <linux/init.h> 35 #include <linux/security.h> 36 #include <linux/mutex.h> 37 #include <linux/if_addr.h> 38 #include <linux/if_bridge.h> 39 #include <linux/pci.h> 40 #include <linux/etherdevice.h> 41 42 #include <asm/uaccess.h> 43 44 #include <linux/inet.h> 45 #include <linux/netdevice.h> 46 #include <net/ip.h> 47 #include <net/protocol.h> 48 #include <net/arp.h> 49 #include <net/route.h> 50 #include <net/udp.h> 51 #include <net/sock.h> 52 #include <net/pkt_sched.h> 53 #include <net/fib_rules.h> 54 #include <net/rtnetlink.h> 55 #include <net/net_namespace.h> 56 57 struct rtnl_link { 58 rtnl_doit_func doit; 59 rtnl_dumpit_func dumpit; 60 rtnl_calcit_func calcit; 61 }; 62 63 static DEFINE_MUTEX(rtnl_mutex); 64 65 void rtnl_lock(void) 66 { 67 mutex_lock(&rtnl_mutex); 68 } 69 EXPORT_SYMBOL(rtnl_lock); 70 71 void __rtnl_unlock(void) 72 { 73 mutex_unlock(&rtnl_mutex); 74 } 75 76 void rtnl_unlock(void) 77 { 78 /* This fellow will unlock it for us. */ 79 netdev_run_todo(); 80 } 81 EXPORT_SYMBOL(rtnl_unlock); 82 83 int rtnl_trylock(void) 84 { 85 return mutex_trylock(&rtnl_mutex); 86 } 87 EXPORT_SYMBOL(rtnl_trylock); 88 89 int rtnl_is_locked(void) 90 { 91 return mutex_is_locked(&rtnl_mutex); 92 } 93 EXPORT_SYMBOL(rtnl_is_locked); 94 95 #ifdef CONFIG_PROVE_LOCKING 96 int lockdep_rtnl_is_held(void) 97 { 98 return lockdep_is_held(&rtnl_mutex); 99 } 100 EXPORT_SYMBOL(lockdep_rtnl_is_held); 101 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 102 103 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 104 105 static inline int rtm_msgindex(int msgtype) 106 { 107 int msgindex = msgtype - RTM_BASE; 108 109 /* 110 * msgindex < 0 implies someone tried to register a netlink 111 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 112 * the message type has not been added to linux/rtnetlink.h 113 */ 114 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 115 116 return msgindex; 117 } 118 119 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 120 { 121 struct rtnl_link *tab; 122 123 if (protocol <= RTNL_FAMILY_MAX) 124 tab = rtnl_msg_handlers[protocol]; 125 else 126 tab = NULL; 127 128 if (tab == NULL || tab[msgindex].doit == NULL) 129 tab = rtnl_msg_handlers[PF_UNSPEC]; 130 131 return tab[msgindex].doit; 132 } 133 134 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 135 { 136 struct rtnl_link *tab; 137 138 if (protocol <= RTNL_FAMILY_MAX) 139 tab = rtnl_msg_handlers[protocol]; 140 else 141 tab = NULL; 142 143 if (tab == NULL || tab[msgindex].dumpit == NULL) 144 tab = rtnl_msg_handlers[PF_UNSPEC]; 145 146 return tab[msgindex].dumpit; 147 } 148 149 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 150 { 151 struct rtnl_link *tab; 152 153 if (protocol <= RTNL_FAMILY_MAX) 154 tab = rtnl_msg_handlers[protocol]; 155 else 156 tab = NULL; 157 158 if (tab == NULL || tab[msgindex].calcit == NULL) 159 tab = rtnl_msg_handlers[PF_UNSPEC]; 160 161 return tab[msgindex].calcit; 162 } 163 164 /** 165 * __rtnl_register - Register a rtnetlink message type 166 * @protocol: Protocol family or PF_UNSPEC 167 * @msgtype: rtnetlink message type 168 * @doit: Function pointer called for each request message 169 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 170 * @calcit: Function pointer to calc size of dump message 171 * 172 * Registers the specified function pointers (at least one of them has 173 * to be non-NULL) to be called whenever a request message for the 174 * specified protocol family and message type is received. 175 * 176 * The special protocol family PF_UNSPEC may be used to define fallback 177 * function pointers for the case when no entry for the specific protocol 178 * family exists. 179 * 180 * Returns 0 on success or a negative error code. 181 */ 182 int __rtnl_register(int protocol, int msgtype, 183 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 184 rtnl_calcit_func calcit) 185 { 186 struct rtnl_link *tab; 187 int msgindex; 188 189 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 190 msgindex = rtm_msgindex(msgtype); 191 192 tab = rtnl_msg_handlers[protocol]; 193 if (tab == NULL) { 194 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 195 if (tab == NULL) 196 return -ENOBUFS; 197 198 rtnl_msg_handlers[protocol] = tab; 199 } 200 201 if (doit) 202 tab[msgindex].doit = doit; 203 204 if (dumpit) 205 tab[msgindex].dumpit = dumpit; 206 207 if (calcit) 208 tab[msgindex].calcit = calcit; 209 210 return 0; 211 } 212 EXPORT_SYMBOL_GPL(__rtnl_register); 213 214 /** 215 * rtnl_register - Register a rtnetlink message type 216 * 217 * Identical to __rtnl_register() but panics on failure. This is useful 218 * as failure of this function is very unlikely, it can only happen due 219 * to lack of memory when allocating the chain to store all message 220 * handlers for a protocol. Meant for use in init functions where lack 221 * of memory implies no sense in continuing. 222 */ 223 void rtnl_register(int protocol, int msgtype, 224 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 225 rtnl_calcit_func calcit) 226 { 227 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 228 panic("Unable to register rtnetlink message handler, " 229 "protocol = %d, message type = %d\n", 230 protocol, msgtype); 231 } 232 EXPORT_SYMBOL_GPL(rtnl_register); 233 234 /** 235 * rtnl_unregister - Unregister a rtnetlink message type 236 * @protocol: Protocol family or PF_UNSPEC 237 * @msgtype: rtnetlink message type 238 * 239 * Returns 0 on success or a negative error code. 240 */ 241 int rtnl_unregister(int protocol, int msgtype) 242 { 243 int msgindex; 244 245 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 246 msgindex = rtm_msgindex(msgtype); 247 248 if (rtnl_msg_handlers[protocol] == NULL) 249 return -ENOENT; 250 251 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 252 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 253 254 return 0; 255 } 256 EXPORT_SYMBOL_GPL(rtnl_unregister); 257 258 /** 259 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 260 * @protocol : Protocol family or PF_UNSPEC 261 * 262 * Identical to calling rtnl_unregster() for all registered message types 263 * of a certain protocol family. 264 */ 265 void rtnl_unregister_all(int protocol) 266 { 267 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 268 269 kfree(rtnl_msg_handlers[protocol]); 270 rtnl_msg_handlers[protocol] = NULL; 271 } 272 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 273 274 static LIST_HEAD(link_ops); 275 276 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 277 { 278 const struct rtnl_link_ops *ops; 279 280 list_for_each_entry(ops, &link_ops, list) { 281 if (!strcmp(ops->kind, kind)) 282 return ops; 283 } 284 return NULL; 285 } 286 287 /** 288 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 289 * @ops: struct rtnl_link_ops * to register 290 * 291 * The caller must hold the rtnl_mutex. This function should be used 292 * by drivers that create devices during module initialization. It 293 * must be called before registering the devices. 294 * 295 * Returns 0 on success or a negative error code. 296 */ 297 int __rtnl_link_register(struct rtnl_link_ops *ops) 298 { 299 if (rtnl_link_ops_get(ops->kind)) 300 return -EEXIST; 301 302 if (!ops->dellink) 303 ops->dellink = unregister_netdevice_queue; 304 305 list_add_tail(&ops->list, &link_ops); 306 return 0; 307 } 308 EXPORT_SYMBOL_GPL(__rtnl_link_register); 309 310 /** 311 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 312 * @ops: struct rtnl_link_ops * to register 313 * 314 * Returns 0 on success or a negative error code. 315 */ 316 int rtnl_link_register(struct rtnl_link_ops *ops) 317 { 318 int err; 319 320 rtnl_lock(); 321 err = __rtnl_link_register(ops); 322 rtnl_unlock(); 323 return err; 324 } 325 EXPORT_SYMBOL_GPL(rtnl_link_register); 326 327 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 328 { 329 struct net_device *dev; 330 LIST_HEAD(list_kill); 331 332 for_each_netdev(net, dev) { 333 if (dev->rtnl_link_ops == ops) 334 ops->dellink(dev, &list_kill); 335 } 336 unregister_netdevice_many(&list_kill); 337 } 338 339 /** 340 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 341 * @ops: struct rtnl_link_ops * to unregister 342 * 343 * The caller must hold the rtnl_mutex. 344 */ 345 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 346 { 347 struct net *net; 348 349 for_each_net(net) { 350 __rtnl_kill_links(net, ops); 351 } 352 list_del(&ops->list); 353 } 354 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 355 356 /** 357 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 358 * @ops: struct rtnl_link_ops * to unregister 359 */ 360 void rtnl_link_unregister(struct rtnl_link_ops *ops) 361 { 362 rtnl_lock(); 363 __rtnl_link_unregister(ops); 364 rtnl_unlock(); 365 } 366 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 367 368 static size_t rtnl_link_get_size(const struct net_device *dev) 369 { 370 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 371 size_t size; 372 373 if (!ops) 374 return 0; 375 376 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 377 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 378 379 if (ops->get_size) 380 /* IFLA_INFO_DATA + nested data */ 381 size += nla_total_size(sizeof(struct nlattr)) + 382 ops->get_size(dev); 383 384 if (ops->get_xstats_size) 385 /* IFLA_INFO_XSTATS */ 386 size += nla_total_size(ops->get_xstats_size(dev)); 387 388 return size; 389 } 390 391 static LIST_HEAD(rtnl_af_ops); 392 393 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 394 { 395 const struct rtnl_af_ops *ops; 396 397 list_for_each_entry(ops, &rtnl_af_ops, list) { 398 if (ops->family == family) 399 return ops; 400 } 401 402 return NULL; 403 } 404 405 /** 406 * __rtnl_af_register - Register rtnl_af_ops with rtnetlink. 407 * @ops: struct rtnl_af_ops * to register 408 * 409 * The caller must hold the rtnl_mutex. 410 * 411 * Returns 0 on success or a negative error code. 412 */ 413 int __rtnl_af_register(struct rtnl_af_ops *ops) 414 { 415 list_add_tail(&ops->list, &rtnl_af_ops); 416 return 0; 417 } 418 EXPORT_SYMBOL_GPL(__rtnl_af_register); 419 420 /** 421 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 422 * @ops: struct rtnl_af_ops * to register 423 * 424 * Returns 0 on success or a negative error code. 425 */ 426 int rtnl_af_register(struct rtnl_af_ops *ops) 427 { 428 int err; 429 430 rtnl_lock(); 431 err = __rtnl_af_register(ops); 432 rtnl_unlock(); 433 return err; 434 } 435 EXPORT_SYMBOL_GPL(rtnl_af_register); 436 437 /** 438 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 439 * @ops: struct rtnl_af_ops * to unregister 440 * 441 * The caller must hold the rtnl_mutex. 442 */ 443 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 444 { 445 list_del(&ops->list); 446 } 447 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 448 449 /** 450 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 451 * @ops: struct rtnl_af_ops * to unregister 452 */ 453 void rtnl_af_unregister(struct rtnl_af_ops *ops) 454 { 455 rtnl_lock(); 456 __rtnl_af_unregister(ops); 457 rtnl_unlock(); 458 } 459 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 460 461 static size_t rtnl_link_get_af_size(const struct net_device *dev) 462 { 463 struct rtnl_af_ops *af_ops; 464 size_t size; 465 466 /* IFLA_AF_SPEC */ 467 size = nla_total_size(sizeof(struct nlattr)); 468 469 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 470 if (af_ops->get_link_af_size) { 471 /* AF_* + nested data */ 472 size += nla_total_size(sizeof(struct nlattr)) + 473 af_ops->get_link_af_size(dev); 474 } 475 } 476 477 return size; 478 } 479 480 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 481 { 482 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 483 struct nlattr *linkinfo, *data; 484 int err = -EMSGSIZE; 485 486 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 487 if (linkinfo == NULL) 488 goto out; 489 490 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 491 goto err_cancel_link; 492 if (ops->fill_xstats) { 493 err = ops->fill_xstats(skb, dev); 494 if (err < 0) 495 goto err_cancel_link; 496 } 497 if (ops->fill_info) { 498 data = nla_nest_start(skb, IFLA_INFO_DATA); 499 if (data == NULL) 500 goto err_cancel_link; 501 err = ops->fill_info(skb, dev); 502 if (err < 0) 503 goto err_cancel_data; 504 nla_nest_end(skb, data); 505 } 506 507 nla_nest_end(skb, linkinfo); 508 return 0; 509 510 err_cancel_data: 511 nla_nest_cancel(skb, data); 512 err_cancel_link: 513 nla_nest_cancel(skb, linkinfo); 514 out: 515 return err; 516 } 517 518 static const int rtm_min[RTM_NR_FAMILIES] = 519 { 520 [RTM_FAM(RTM_NEWLINK)] = NLMSG_LENGTH(sizeof(struct ifinfomsg)), 521 [RTM_FAM(RTM_NEWADDR)] = NLMSG_LENGTH(sizeof(struct ifaddrmsg)), 522 [RTM_FAM(RTM_NEWROUTE)] = NLMSG_LENGTH(sizeof(struct rtmsg)), 523 [RTM_FAM(RTM_NEWRULE)] = NLMSG_LENGTH(sizeof(struct fib_rule_hdr)), 524 [RTM_FAM(RTM_NEWQDISC)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 525 [RTM_FAM(RTM_NEWTCLASS)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 526 [RTM_FAM(RTM_NEWTFILTER)] = NLMSG_LENGTH(sizeof(struct tcmsg)), 527 [RTM_FAM(RTM_NEWACTION)] = NLMSG_LENGTH(sizeof(struct tcamsg)), 528 [RTM_FAM(RTM_GETMULTICAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 529 [RTM_FAM(RTM_GETANYCAST)] = NLMSG_LENGTH(sizeof(struct rtgenmsg)), 530 }; 531 532 static const int rta_max[RTM_NR_FAMILIES] = 533 { 534 [RTM_FAM(RTM_NEWLINK)] = IFLA_MAX, 535 [RTM_FAM(RTM_NEWADDR)] = IFA_MAX, 536 [RTM_FAM(RTM_NEWROUTE)] = RTA_MAX, 537 [RTM_FAM(RTM_NEWRULE)] = FRA_MAX, 538 [RTM_FAM(RTM_NEWQDISC)] = TCA_MAX, 539 [RTM_FAM(RTM_NEWTCLASS)] = TCA_MAX, 540 [RTM_FAM(RTM_NEWTFILTER)] = TCA_MAX, 541 [RTM_FAM(RTM_NEWACTION)] = TCAA_MAX, 542 }; 543 544 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 545 { 546 struct sock *rtnl = net->rtnl; 547 int err = 0; 548 549 NETLINK_CB(skb).dst_group = group; 550 if (echo) 551 atomic_inc(&skb->users); 552 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 553 if (echo) 554 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 555 return err; 556 } 557 558 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 559 { 560 struct sock *rtnl = net->rtnl; 561 562 return nlmsg_unicast(rtnl, skb, pid); 563 } 564 EXPORT_SYMBOL(rtnl_unicast); 565 566 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 567 struct nlmsghdr *nlh, gfp_t flags) 568 { 569 struct sock *rtnl = net->rtnl; 570 int report = 0; 571 572 if (nlh) 573 report = nlmsg_report(nlh); 574 575 nlmsg_notify(rtnl, skb, pid, group, report, flags); 576 } 577 EXPORT_SYMBOL(rtnl_notify); 578 579 void rtnl_set_sk_err(struct net *net, u32 group, int error) 580 { 581 struct sock *rtnl = net->rtnl; 582 583 netlink_set_err(rtnl, 0, group, error); 584 } 585 EXPORT_SYMBOL(rtnl_set_sk_err); 586 587 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 588 { 589 struct nlattr *mx; 590 int i, valid = 0; 591 592 mx = nla_nest_start(skb, RTA_METRICS); 593 if (mx == NULL) 594 return -ENOBUFS; 595 596 for (i = 0; i < RTAX_MAX; i++) { 597 if (metrics[i]) { 598 valid++; 599 if (nla_put_u32(skb, i+1, metrics[i])) 600 goto nla_put_failure; 601 } 602 } 603 604 if (!valid) { 605 nla_nest_cancel(skb, mx); 606 return 0; 607 } 608 609 return nla_nest_end(skb, mx); 610 611 nla_put_failure: 612 nla_nest_cancel(skb, mx); 613 return -EMSGSIZE; 614 } 615 EXPORT_SYMBOL(rtnetlink_put_metrics); 616 617 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 618 long expires, u32 error) 619 { 620 struct rta_cacheinfo ci = { 621 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 622 .rta_used = dst->__use, 623 .rta_clntref = atomic_read(&(dst->__refcnt)), 624 .rta_error = error, 625 .rta_id = id, 626 }; 627 628 if (expires) { 629 unsigned long clock; 630 631 clock = jiffies_to_clock_t(abs(expires)); 632 clock = min_t(unsigned long, clock, INT_MAX); 633 ci.rta_expires = (expires > 0) ? clock : -clock; 634 } 635 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 636 } 637 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 638 639 static void set_operstate(struct net_device *dev, unsigned char transition) 640 { 641 unsigned char operstate = dev->operstate; 642 643 switch (transition) { 644 case IF_OPER_UP: 645 if ((operstate == IF_OPER_DORMANT || 646 operstate == IF_OPER_UNKNOWN) && 647 !netif_dormant(dev)) 648 operstate = IF_OPER_UP; 649 break; 650 651 case IF_OPER_DORMANT: 652 if (operstate == IF_OPER_UP || 653 operstate == IF_OPER_UNKNOWN) 654 operstate = IF_OPER_DORMANT; 655 break; 656 } 657 658 if (dev->operstate != operstate) { 659 write_lock_bh(&dev_base_lock); 660 dev->operstate = operstate; 661 write_unlock_bh(&dev_base_lock); 662 netdev_state_change(dev); 663 } 664 } 665 666 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 667 { 668 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 669 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 670 } 671 672 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 673 const struct ifinfomsg *ifm) 674 { 675 unsigned int flags = ifm->ifi_flags; 676 677 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 678 if (ifm->ifi_change) 679 flags = (flags & ifm->ifi_change) | 680 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 681 682 return flags; 683 } 684 685 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 686 const struct rtnl_link_stats64 *b) 687 { 688 a->rx_packets = b->rx_packets; 689 a->tx_packets = b->tx_packets; 690 a->rx_bytes = b->rx_bytes; 691 a->tx_bytes = b->tx_bytes; 692 a->rx_errors = b->rx_errors; 693 a->tx_errors = b->tx_errors; 694 a->rx_dropped = b->rx_dropped; 695 a->tx_dropped = b->tx_dropped; 696 697 a->multicast = b->multicast; 698 a->collisions = b->collisions; 699 700 a->rx_length_errors = b->rx_length_errors; 701 a->rx_over_errors = b->rx_over_errors; 702 a->rx_crc_errors = b->rx_crc_errors; 703 a->rx_frame_errors = b->rx_frame_errors; 704 a->rx_fifo_errors = b->rx_fifo_errors; 705 a->rx_missed_errors = b->rx_missed_errors; 706 707 a->tx_aborted_errors = b->tx_aborted_errors; 708 a->tx_carrier_errors = b->tx_carrier_errors; 709 a->tx_fifo_errors = b->tx_fifo_errors; 710 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 711 a->tx_window_errors = b->tx_window_errors; 712 713 a->rx_compressed = b->rx_compressed; 714 a->tx_compressed = b->tx_compressed; 715 } 716 717 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) 718 { 719 memcpy(v, b, sizeof(*b)); 720 } 721 722 /* All VF info */ 723 static inline int rtnl_vfinfo_size(const struct net_device *dev, 724 u32 ext_filter_mask) 725 { 726 if (dev->dev.parent && dev_is_pci(dev->dev.parent) && 727 (ext_filter_mask & RTEXT_FILTER_VF)) { 728 int num_vfs = dev_num_vf(dev->dev.parent); 729 size_t size = nla_total_size(sizeof(struct nlattr)); 730 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 731 size += num_vfs * 732 (nla_total_size(sizeof(struct ifla_vf_mac)) + 733 nla_total_size(sizeof(struct ifla_vf_vlan)) + 734 nla_total_size(sizeof(struct ifla_vf_tx_rate)) + 735 nla_total_size(sizeof(struct ifla_vf_spoofchk))); 736 return size; 737 } else 738 return 0; 739 } 740 741 static size_t rtnl_port_size(const struct net_device *dev) 742 { 743 size_t port_size = nla_total_size(4) /* PORT_VF */ 744 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 745 + nla_total_size(sizeof(struct ifla_port_vsi)) 746 /* PORT_VSI_TYPE */ 747 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 748 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 749 + nla_total_size(1) /* PROT_VDP_REQUEST */ 750 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 751 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 752 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 753 + port_size; 754 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 755 + port_size; 756 757 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) 758 return 0; 759 if (dev_num_vf(dev->dev.parent)) 760 return port_self_size + vf_ports_size + 761 vf_port_size * dev_num_vf(dev->dev.parent); 762 else 763 return port_self_size; 764 } 765 766 static noinline size_t if_nlmsg_size(const struct net_device *dev, 767 u32 ext_filter_mask) 768 { 769 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 770 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 771 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 772 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 773 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 774 + nla_total_size(sizeof(struct rtnl_link_stats)) 775 + nla_total_size(sizeof(struct rtnl_link_stats64)) 776 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 777 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 778 + nla_total_size(4) /* IFLA_TXQLEN */ 779 + nla_total_size(4) /* IFLA_WEIGHT */ 780 + nla_total_size(4) /* IFLA_MTU */ 781 + nla_total_size(4) /* IFLA_LINK */ 782 + nla_total_size(4) /* IFLA_MASTER */ 783 + nla_total_size(4) /* IFLA_PROMISCUITY */ 784 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 785 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 786 + nla_total_size(1) /* IFLA_OPERSTATE */ 787 + nla_total_size(1) /* IFLA_LINKMODE */ 788 + nla_total_size(ext_filter_mask 789 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 790 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 791 + rtnl_port_size(dev) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 792 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 793 + rtnl_link_get_af_size(dev); /* IFLA_AF_SPEC */ 794 } 795 796 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 797 { 798 struct nlattr *vf_ports; 799 struct nlattr *vf_port; 800 int vf; 801 int err; 802 803 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 804 if (!vf_ports) 805 return -EMSGSIZE; 806 807 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 808 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 809 if (!vf_port) 810 goto nla_put_failure; 811 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 812 goto nla_put_failure; 813 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 814 if (err == -EMSGSIZE) 815 goto nla_put_failure; 816 if (err) { 817 nla_nest_cancel(skb, vf_port); 818 continue; 819 } 820 nla_nest_end(skb, vf_port); 821 } 822 823 nla_nest_end(skb, vf_ports); 824 825 return 0; 826 827 nla_put_failure: 828 nla_nest_cancel(skb, vf_ports); 829 return -EMSGSIZE; 830 } 831 832 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 833 { 834 struct nlattr *port_self; 835 int err; 836 837 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 838 if (!port_self) 839 return -EMSGSIZE; 840 841 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 842 if (err) { 843 nla_nest_cancel(skb, port_self); 844 return (err == -EMSGSIZE) ? err : 0; 845 } 846 847 nla_nest_end(skb, port_self); 848 849 return 0; 850 } 851 852 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev) 853 { 854 int err; 855 856 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent) 857 return 0; 858 859 err = rtnl_port_self_fill(skb, dev); 860 if (err) 861 return err; 862 863 if (dev_num_vf(dev->dev.parent)) { 864 err = rtnl_vf_ports_fill(skb, dev); 865 if (err) 866 return err; 867 } 868 869 return 0; 870 } 871 872 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 873 int type, u32 pid, u32 seq, u32 change, 874 unsigned int flags, u32 ext_filter_mask) 875 { 876 struct ifinfomsg *ifm; 877 struct nlmsghdr *nlh; 878 struct rtnl_link_stats64 temp; 879 const struct rtnl_link_stats64 *stats; 880 struct nlattr *attr, *af_spec; 881 struct rtnl_af_ops *af_ops; 882 883 ASSERT_RTNL(); 884 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 885 if (nlh == NULL) 886 return -EMSGSIZE; 887 888 ifm = nlmsg_data(nlh); 889 ifm->ifi_family = AF_UNSPEC; 890 ifm->__ifi_pad = 0; 891 ifm->ifi_type = dev->type; 892 ifm->ifi_index = dev->ifindex; 893 ifm->ifi_flags = dev_get_flags(dev); 894 ifm->ifi_change = change; 895 896 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 897 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 898 nla_put_u8(skb, IFLA_OPERSTATE, 899 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 900 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 901 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 902 nla_put_u32(skb, IFLA_GROUP, dev->group) || 903 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 904 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 905 #ifdef CONFIG_RPS 906 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 907 #endif 908 (dev->ifindex != dev->iflink && 909 nla_put_u32(skb, IFLA_LINK, dev->iflink)) || 910 (dev->master && 911 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) || 912 (dev->qdisc && 913 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 914 (dev->ifalias && 915 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias))) 916 goto nla_put_failure; 917 918 if (1) { 919 struct rtnl_link_ifmap map = { 920 .mem_start = dev->mem_start, 921 .mem_end = dev->mem_end, 922 .base_addr = dev->base_addr, 923 .irq = dev->irq, 924 .dma = dev->dma, 925 .port = dev->if_port, 926 }; 927 if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) 928 goto nla_put_failure; 929 } 930 931 if (dev->addr_len) { 932 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 933 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 934 goto nla_put_failure; 935 } 936 937 attr = nla_reserve(skb, IFLA_STATS, 938 sizeof(struct rtnl_link_stats)); 939 if (attr == NULL) 940 goto nla_put_failure; 941 942 stats = dev_get_stats(dev, &temp); 943 copy_rtnl_link_stats(nla_data(attr), stats); 944 945 attr = nla_reserve(skb, IFLA_STATS64, 946 sizeof(struct rtnl_link_stats64)); 947 if (attr == NULL) 948 goto nla_put_failure; 949 copy_rtnl_link_stats64(nla_data(attr), stats); 950 951 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 952 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 953 goto nla_put_failure; 954 955 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent 956 && (ext_filter_mask & RTEXT_FILTER_VF)) { 957 int i; 958 959 struct nlattr *vfinfo, *vf; 960 int num_vfs = dev_num_vf(dev->dev.parent); 961 962 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 963 if (!vfinfo) 964 goto nla_put_failure; 965 for (i = 0; i < num_vfs; i++) { 966 struct ifla_vf_info ivi; 967 struct ifla_vf_mac vf_mac; 968 struct ifla_vf_vlan vf_vlan; 969 struct ifla_vf_tx_rate vf_tx_rate; 970 struct ifla_vf_spoofchk vf_spoofchk; 971 972 /* 973 * Not all SR-IOV capable drivers support the 974 * spoofcheck query. Preset to -1 so the user 975 * space tool can detect that the driver didn't 976 * report anything. 977 */ 978 ivi.spoofchk = -1; 979 if (dev->netdev_ops->ndo_get_vf_config(dev, i, &ivi)) 980 break; 981 vf_mac.vf = 982 vf_vlan.vf = 983 vf_tx_rate.vf = 984 vf_spoofchk.vf = ivi.vf; 985 986 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 987 vf_vlan.vlan = ivi.vlan; 988 vf_vlan.qos = ivi.qos; 989 vf_tx_rate.rate = ivi.tx_rate; 990 vf_spoofchk.setting = ivi.spoofchk; 991 vf = nla_nest_start(skb, IFLA_VF_INFO); 992 if (!vf) { 993 nla_nest_cancel(skb, vfinfo); 994 goto nla_put_failure; 995 } 996 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 997 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 998 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 999 &vf_tx_rate) || 1000 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1001 &vf_spoofchk)) 1002 goto nla_put_failure; 1003 nla_nest_end(skb, vf); 1004 } 1005 nla_nest_end(skb, vfinfo); 1006 } 1007 1008 if (rtnl_port_fill(skb, dev)) 1009 goto nla_put_failure; 1010 1011 if (dev->rtnl_link_ops) { 1012 if (rtnl_link_fill(skb, dev) < 0) 1013 goto nla_put_failure; 1014 } 1015 1016 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1017 goto nla_put_failure; 1018 1019 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1020 if (af_ops->fill_link_af) { 1021 struct nlattr *af; 1022 int err; 1023 1024 if (!(af = nla_nest_start(skb, af_ops->family))) 1025 goto nla_put_failure; 1026 1027 err = af_ops->fill_link_af(skb, dev); 1028 1029 /* 1030 * Caller may return ENODATA to indicate that there 1031 * was no data to be dumped. This is not an error, it 1032 * means we should trim the attribute header and 1033 * continue. 1034 */ 1035 if (err == -ENODATA) 1036 nla_nest_cancel(skb, af); 1037 else if (err < 0) 1038 goto nla_put_failure; 1039 1040 nla_nest_end(skb, af); 1041 } 1042 } 1043 1044 nla_nest_end(skb, af_spec); 1045 1046 return nlmsg_end(skb, nlh); 1047 1048 nla_put_failure: 1049 nlmsg_cancel(skb, nlh); 1050 return -EMSGSIZE; 1051 } 1052 1053 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1054 { 1055 struct net *net = sock_net(skb->sk); 1056 int h, s_h; 1057 int idx = 0, s_idx; 1058 struct net_device *dev; 1059 struct hlist_head *head; 1060 struct hlist_node *node; 1061 struct nlattr *tb[IFLA_MAX+1]; 1062 u32 ext_filter_mask = 0; 1063 1064 s_h = cb->args[0]; 1065 s_idx = cb->args[1]; 1066 1067 rcu_read_lock(); 1068 cb->seq = net->dev_base_seq; 1069 1070 if (nlmsg_parse(cb->nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX, 1071 ifla_policy) >= 0) { 1072 1073 if (tb[IFLA_EXT_MASK]) 1074 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1075 } 1076 1077 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1078 idx = 0; 1079 head = &net->dev_index_head[h]; 1080 hlist_for_each_entry_rcu(dev, node, head, index_hlist) { 1081 if (idx < s_idx) 1082 goto cont; 1083 if (rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1084 NETLINK_CB(cb->skb).portid, 1085 cb->nlh->nlmsg_seq, 0, 1086 NLM_F_MULTI, 1087 ext_filter_mask) <= 0) 1088 goto out; 1089 1090 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1091 cont: 1092 idx++; 1093 } 1094 } 1095 out: 1096 rcu_read_unlock(); 1097 cb->args[1] = idx; 1098 cb->args[0] = h; 1099 1100 return skb->len; 1101 } 1102 1103 const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1104 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1105 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1106 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1107 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1108 [IFLA_MTU] = { .type = NLA_U32 }, 1109 [IFLA_LINK] = { .type = NLA_U32 }, 1110 [IFLA_MASTER] = { .type = NLA_U32 }, 1111 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1112 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1113 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1114 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1115 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1116 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1117 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1118 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1119 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1120 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1121 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1122 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1123 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1124 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1125 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1126 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1127 }; 1128 EXPORT_SYMBOL(ifla_policy); 1129 1130 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1131 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1132 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1133 }; 1134 1135 static const struct nla_policy ifla_vfinfo_policy[IFLA_VF_INFO_MAX+1] = { 1136 [IFLA_VF_INFO] = { .type = NLA_NESTED }, 1137 }; 1138 1139 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1140 [IFLA_VF_MAC] = { .type = NLA_BINARY, 1141 .len = sizeof(struct ifla_vf_mac) }, 1142 [IFLA_VF_VLAN] = { .type = NLA_BINARY, 1143 .len = sizeof(struct ifla_vf_vlan) }, 1144 [IFLA_VF_TX_RATE] = { .type = NLA_BINARY, 1145 .len = sizeof(struct ifla_vf_tx_rate) }, 1146 [IFLA_VF_SPOOFCHK] = { .type = NLA_BINARY, 1147 .len = sizeof(struct ifla_vf_spoofchk) }, 1148 }; 1149 1150 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1151 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1152 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1153 .len = PORT_PROFILE_MAX }, 1154 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1155 .len = sizeof(struct ifla_port_vsi)}, 1156 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1157 .len = PORT_UUID_MAX }, 1158 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1159 .len = PORT_UUID_MAX }, 1160 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1161 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1162 }; 1163 1164 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1165 { 1166 struct net *net; 1167 /* Examine the link attributes and figure out which 1168 * network namespace we are talking about. 1169 */ 1170 if (tb[IFLA_NET_NS_PID]) 1171 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1172 else if (tb[IFLA_NET_NS_FD]) 1173 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1174 else 1175 net = get_net(src_net); 1176 return net; 1177 } 1178 EXPORT_SYMBOL(rtnl_link_get_net); 1179 1180 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1181 { 1182 if (dev) { 1183 if (tb[IFLA_ADDRESS] && 1184 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1185 return -EINVAL; 1186 1187 if (tb[IFLA_BROADCAST] && 1188 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1189 return -EINVAL; 1190 } 1191 1192 if (tb[IFLA_AF_SPEC]) { 1193 struct nlattr *af; 1194 int rem, err; 1195 1196 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1197 const struct rtnl_af_ops *af_ops; 1198 1199 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1200 return -EAFNOSUPPORT; 1201 1202 if (!af_ops->set_link_af) 1203 return -EOPNOTSUPP; 1204 1205 if (af_ops->validate_link_af) { 1206 err = af_ops->validate_link_af(dev, af); 1207 if (err < 0) 1208 return err; 1209 } 1210 } 1211 } 1212 1213 return 0; 1214 } 1215 1216 static int do_setvfinfo(struct net_device *dev, struct nlattr *attr) 1217 { 1218 int rem, err = -EINVAL; 1219 struct nlattr *vf; 1220 const struct net_device_ops *ops = dev->netdev_ops; 1221 1222 nla_for_each_nested(vf, attr, rem) { 1223 switch (nla_type(vf)) { 1224 case IFLA_VF_MAC: { 1225 struct ifla_vf_mac *ivm; 1226 ivm = nla_data(vf); 1227 err = -EOPNOTSUPP; 1228 if (ops->ndo_set_vf_mac) 1229 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1230 ivm->mac); 1231 break; 1232 } 1233 case IFLA_VF_VLAN: { 1234 struct ifla_vf_vlan *ivv; 1235 ivv = nla_data(vf); 1236 err = -EOPNOTSUPP; 1237 if (ops->ndo_set_vf_vlan) 1238 err = ops->ndo_set_vf_vlan(dev, ivv->vf, 1239 ivv->vlan, 1240 ivv->qos); 1241 break; 1242 } 1243 case IFLA_VF_TX_RATE: { 1244 struct ifla_vf_tx_rate *ivt; 1245 ivt = nla_data(vf); 1246 err = -EOPNOTSUPP; 1247 if (ops->ndo_set_vf_tx_rate) 1248 err = ops->ndo_set_vf_tx_rate(dev, ivt->vf, 1249 ivt->rate); 1250 break; 1251 } 1252 case IFLA_VF_SPOOFCHK: { 1253 struct ifla_vf_spoofchk *ivs; 1254 ivs = nla_data(vf); 1255 err = -EOPNOTSUPP; 1256 if (ops->ndo_set_vf_spoofchk) 1257 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1258 ivs->setting); 1259 break; 1260 } 1261 default: 1262 err = -EINVAL; 1263 break; 1264 } 1265 if (err) 1266 break; 1267 } 1268 return err; 1269 } 1270 1271 static int do_set_master(struct net_device *dev, int ifindex) 1272 { 1273 struct net_device *master_dev; 1274 const struct net_device_ops *ops; 1275 int err; 1276 1277 if (dev->master) { 1278 if (dev->master->ifindex == ifindex) 1279 return 0; 1280 ops = dev->master->netdev_ops; 1281 if (ops->ndo_del_slave) { 1282 err = ops->ndo_del_slave(dev->master, dev); 1283 if (err) 1284 return err; 1285 } else { 1286 return -EOPNOTSUPP; 1287 } 1288 } 1289 1290 if (ifindex) { 1291 master_dev = __dev_get_by_index(dev_net(dev), ifindex); 1292 if (!master_dev) 1293 return -EINVAL; 1294 ops = master_dev->netdev_ops; 1295 if (ops->ndo_add_slave) { 1296 err = ops->ndo_add_slave(master_dev, dev); 1297 if (err) 1298 return err; 1299 } else { 1300 return -EOPNOTSUPP; 1301 } 1302 } 1303 return 0; 1304 } 1305 1306 static int do_setlink(struct net_device *dev, struct ifinfomsg *ifm, 1307 struct nlattr **tb, char *ifname, int modified) 1308 { 1309 const struct net_device_ops *ops = dev->netdev_ops; 1310 int send_addr_notify = 0; 1311 int err; 1312 1313 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1314 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1315 if (IS_ERR(net)) { 1316 err = PTR_ERR(net); 1317 goto errout; 1318 } 1319 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) { 1320 err = -EPERM; 1321 goto errout; 1322 } 1323 err = dev_change_net_namespace(dev, net, ifname); 1324 put_net(net); 1325 if (err) 1326 goto errout; 1327 modified = 1; 1328 } 1329 1330 if (tb[IFLA_MAP]) { 1331 struct rtnl_link_ifmap *u_map; 1332 struct ifmap k_map; 1333 1334 if (!ops->ndo_set_config) { 1335 err = -EOPNOTSUPP; 1336 goto errout; 1337 } 1338 1339 if (!netif_device_present(dev)) { 1340 err = -ENODEV; 1341 goto errout; 1342 } 1343 1344 u_map = nla_data(tb[IFLA_MAP]); 1345 k_map.mem_start = (unsigned long) u_map->mem_start; 1346 k_map.mem_end = (unsigned long) u_map->mem_end; 1347 k_map.base_addr = (unsigned short) u_map->base_addr; 1348 k_map.irq = (unsigned char) u_map->irq; 1349 k_map.dma = (unsigned char) u_map->dma; 1350 k_map.port = (unsigned char) u_map->port; 1351 1352 err = ops->ndo_set_config(dev, &k_map); 1353 if (err < 0) 1354 goto errout; 1355 1356 modified = 1; 1357 } 1358 1359 if (tb[IFLA_ADDRESS]) { 1360 struct sockaddr *sa; 1361 int len; 1362 1363 if (!ops->ndo_set_mac_address) { 1364 err = -EOPNOTSUPP; 1365 goto errout; 1366 } 1367 1368 if (!netif_device_present(dev)) { 1369 err = -ENODEV; 1370 goto errout; 1371 } 1372 1373 len = sizeof(sa_family_t) + dev->addr_len; 1374 sa = kmalloc(len, GFP_KERNEL); 1375 if (!sa) { 1376 err = -ENOMEM; 1377 goto errout; 1378 } 1379 sa->sa_family = dev->type; 1380 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1381 dev->addr_len); 1382 err = ops->ndo_set_mac_address(dev, sa); 1383 kfree(sa); 1384 if (err) 1385 goto errout; 1386 send_addr_notify = 1; 1387 modified = 1; 1388 add_device_randomness(dev->dev_addr, dev->addr_len); 1389 } 1390 1391 if (tb[IFLA_MTU]) { 1392 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1393 if (err < 0) 1394 goto errout; 1395 modified = 1; 1396 } 1397 1398 if (tb[IFLA_GROUP]) { 1399 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1400 modified = 1; 1401 } 1402 1403 /* 1404 * Interface selected by interface index but interface 1405 * name provided implies that a name change has been 1406 * requested. 1407 */ 1408 if (ifm->ifi_index > 0 && ifname[0]) { 1409 err = dev_change_name(dev, ifname); 1410 if (err < 0) 1411 goto errout; 1412 modified = 1; 1413 } 1414 1415 if (tb[IFLA_IFALIAS]) { 1416 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1417 nla_len(tb[IFLA_IFALIAS])); 1418 if (err < 0) 1419 goto errout; 1420 modified = 1; 1421 } 1422 1423 if (tb[IFLA_BROADCAST]) { 1424 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1425 send_addr_notify = 1; 1426 } 1427 1428 if (ifm->ifi_flags || ifm->ifi_change) { 1429 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1430 if (err < 0) 1431 goto errout; 1432 } 1433 1434 if (tb[IFLA_MASTER]) { 1435 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1436 if (err) 1437 goto errout; 1438 modified = 1; 1439 } 1440 1441 if (tb[IFLA_TXQLEN]) 1442 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1443 1444 if (tb[IFLA_OPERSTATE]) 1445 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1446 1447 if (tb[IFLA_LINKMODE]) { 1448 write_lock_bh(&dev_base_lock); 1449 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1450 write_unlock_bh(&dev_base_lock); 1451 } 1452 1453 if (tb[IFLA_VFINFO_LIST]) { 1454 struct nlattr *attr; 1455 int rem; 1456 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1457 if (nla_type(attr) != IFLA_VF_INFO) { 1458 err = -EINVAL; 1459 goto errout; 1460 } 1461 err = do_setvfinfo(dev, attr); 1462 if (err < 0) 1463 goto errout; 1464 modified = 1; 1465 } 1466 } 1467 err = 0; 1468 1469 if (tb[IFLA_VF_PORTS]) { 1470 struct nlattr *port[IFLA_PORT_MAX+1]; 1471 struct nlattr *attr; 1472 int vf; 1473 int rem; 1474 1475 err = -EOPNOTSUPP; 1476 if (!ops->ndo_set_vf_port) 1477 goto errout; 1478 1479 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1480 if (nla_type(attr) != IFLA_VF_PORT) 1481 continue; 1482 err = nla_parse_nested(port, IFLA_PORT_MAX, 1483 attr, ifla_port_policy); 1484 if (err < 0) 1485 goto errout; 1486 if (!port[IFLA_PORT_VF]) { 1487 err = -EOPNOTSUPP; 1488 goto errout; 1489 } 1490 vf = nla_get_u32(port[IFLA_PORT_VF]); 1491 err = ops->ndo_set_vf_port(dev, vf, port); 1492 if (err < 0) 1493 goto errout; 1494 modified = 1; 1495 } 1496 } 1497 err = 0; 1498 1499 if (tb[IFLA_PORT_SELF]) { 1500 struct nlattr *port[IFLA_PORT_MAX+1]; 1501 1502 err = nla_parse_nested(port, IFLA_PORT_MAX, 1503 tb[IFLA_PORT_SELF], ifla_port_policy); 1504 if (err < 0) 1505 goto errout; 1506 1507 err = -EOPNOTSUPP; 1508 if (ops->ndo_set_vf_port) 1509 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 1510 if (err < 0) 1511 goto errout; 1512 modified = 1; 1513 } 1514 1515 if (tb[IFLA_AF_SPEC]) { 1516 struct nlattr *af; 1517 int rem; 1518 1519 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1520 const struct rtnl_af_ops *af_ops; 1521 1522 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1523 BUG(); 1524 1525 err = af_ops->set_link_af(dev, af); 1526 if (err < 0) 1527 goto errout; 1528 1529 modified = 1; 1530 } 1531 } 1532 err = 0; 1533 1534 errout: 1535 if (err < 0 && modified) 1536 net_warn_ratelimited("A link change request failed with some changes committed already. Interface %s may have been left with an inconsistent configuration, please check.\n", 1537 dev->name); 1538 1539 if (send_addr_notify) 1540 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1541 1542 return err; 1543 } 1544 1545 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1546 { 1547 struct net *net = sock_net(skb->sk); 1548 struct ifinfomsg *ifm; 1549 struct net_device *dev; 1550 int err; 1551 struct nlattr *tb[IFLA_MAX+1]; 1552 char ifname[IFNAMSIZ]; 1553 1554 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1555 if (err < 0) 1556 goto errout; 1557 1558 if (tb[IFLA_IFNAME]) 1559 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1560 else 1561 ifname[0] = '\0'; 1562 1563 err = -EINVAL; 1564 ifm = nlmsg_data(nlh); 1565 if (ifm->ifi_index > 0) 1566 dev = __dev_get_by_index(net, ifm->ifi_index); 1567 else if (tb[IFLA_IFNAME]) 1568 dev = __dev_get_by_name(net, ifname); 1569 else 1570 goto errout; 1571 1572 if (dev == NULL) { 1573 err = -ENODEV; 1574 goto errout; 1575 } 1576 1577 err = validate_linkmsg(dev, tb); 1578 if (err < 0) 1579 goto errout; 1580 1581 err = do_setlink(dev, ifm, tb, ifname, 0); 1582 errout: 1583 return err; 1584 } 1585 1586 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1587 { 1588 struct net *net = sock_net(skb->sk); 1589 const struct rtnl_link_ops *ops; 1590 struct net_device *dev; 1591 struct ifinfomsg *ifm; 1592 char ifname[IFNAMSIZ]; 1593 struct nlattr *tb[IFLA_MAX+1]; 1594 int err; 1595 LIST_HEAD(list_kill); 1596 1597 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1598 if (err < 0) 1599 return err; 1600 1601 if (tb[IFLA_IFNAME]) 1602 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1603 1604 ifm = nlmsg_data(nlh); 1605 if (ifm->ifi_index > 0) 1606 dev = __dev_get_by_index(net, ifm->ifi_index); 1607 else if (tb[IFLA_IFNAME]) 1608 dev = __dev_get_by_name(net, ifname); 1609 else 1610 return -EINVAL; 1611 1612 if (!dev) 1613 return -ENODEV; 1614 1615 ops = dev->rtnl_link_ops; 1616 if (!ops) 1617 return -EOPNOTSUPP; 1618 1619 ops->dellink(dev, &list_kill); 1620 unregister_netdevice_many(&list_kill); 1621 list_del(&list_kill); 1622 return 0; 1623 } 1624 1625 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 1626 { 1627 unsigned int old_flags; 1628 int err; 1629 1630 old_flags = dev->flags; 1631 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 1632 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1633 if (err < 0) 1634 return err; 1635 } 1636 1637 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 1638 rtmsg_ifinfo(RTM_NEWLINK, dev, ~0U); 1639 1640 __dev_notify_flags(dev, old_flags); 1641 return 0; 1642 } 1643 EXPORT_SYMBOL(rtnl_configure_link); 1644 1645 struct net_device *rtnl_create_link(struct net *net, 1646 char *ifname, const struct rtnl_link_ops *ops, struct nlattr *tb[]) 1647 { 1648 int err; 1649 struct net_device *dev; 1650 unsigned int num_tx_queues = 1; 1651 unsigned int num_rx_queues = 1; 1652 1653 if (tb[IFLA_NUM_TX_QUEUES]) 1654 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 1655 else if (ops->get_num_tx_queues) 1656 num_tx_queues = ops->get_num_tx_queues(); 1657 1658 if (tb[IFLA_NUM_RX_QUEUES]) 1659 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 1660 else if (ops->get_num_rx_queues) 1661 num_rx_queues = ops->get_num_rx_queues(); 1662 1663 err = -ENOMEM; 1664 dev = alloc_netdev_mqs(ops->priv_size, ifname, ops->setup, 1665 num_tx_queues, num_rx_queues); 1666 if (!dev) 1667 goto err; 1668 1669 dev_net_set(dev, net); 1670 dev->rtnl_link_ops = ops; 1671 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 1672 1673 if (tb[IFLA_MTU]) 1674 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 1675 if (tb[IFLA_ADDRESS]) 1676 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 1677 nla_len(tb[IFLA_ADDRESS])); 1678 if (tb[IFLA_BROADCAST]) 1679 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 1680 nla_len(tb[IFLA_BROADCAST])); 1681 if (tb[IFLA_TXQLEN]) 1682 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 1683 if (tb[IFLA_OPERSTATE]) 1684 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1685 if (tb[IFLA_LINKMODE]) 1686 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 1687 if (tb[IFLA_GROUP]) 1688 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1689 1690 return dev; 1691 1692 err: 1693 return ERR_PTR(err); 1694 } 1695 EXPORT_SYMBOL(rtnl_create_link); 1696 1697 static int rtnl_group_changelink(struct net *net, int group, 1698 struct ifinfomsg *ifm, 1699 struct nlattr **tb) 1700 { 1701 struct net_device *dev; 1702 int err; 1703 1704 for_each_netdev(net, dev) { 1705 if (dev->group == group) { 1706 err = do_setlink(dev, ifm, tb, NULL, 0); 1707 if (err < 0) 1708 return err; 1709 } 1710 } 1711 1712 return 0; 1713 } 1714 1715 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 1716 { 1717 struct net *net = sock_net(skb->sk); 1718 const struct rtnl_link_ops *ops; 1719 struct net_device *dev; 1720 struct ifinfomsg *ifm; 1721 char kind[MODULE_NAME_LEN]; 1722 char ifname[IFNAMSIZ]; 1723 struct nlattr *tb[IFLA_MAX+1]; 1724 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 1725 int err; 1726 1727 #ifdef CONFIG_MODULES 1728 replay: 1729 #endif 1730 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1731 if (err < 0) 1732 return err; 1733 1734 if (tb[IFLA_IFNAME]) 1735 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1736 else 1737 ifname[0] = '\0'; 1738 1739 ifm = nlmsg_data(nlh); 1740 if (ifm->ifi_index > 0) 1741 dev = __dev_get_by_index(net, ifm->ifi_index); 1742 else { 1743 if (ifname[0]) 1744 dev = __dev_get_by_name(net, ifname); 1745 else 1746 dev = NULL; 1747 } 1748 1749 err = validate_linkmsg(dev, tb); 1750 if (err < 0) 1751 return err; 1752 1753 if (tb[IFLA_LINKINFO]) { 1754 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 1755 tb[IFLA_LINKINFO], ifla_info_policy); 1756 if (err < 0) 1757 return err; 1758 } else 1759 memset(linkinfo, 0, sizeof(linkinfo)); 1760 1761 if (linkinfo[IFLA_INFO_KIND]) { 1762 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 1763 ops = rtnl_link_ops_get(kind); 1764 } else { 1765 kind[0] = '\0'; 1766 ops = NULL; 1767 } 1768 1769 if (1) { 1770 struct nlattr *attr[ops ? ops->maxtype + 1 : 0], **data = NULL; 1771 struct net *dest_net; 1772 1773 if (ops) { 1774 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 1775 err = nla_parse_nested(attr, ops->maxtype, 1776 linkinfo[IFLA_INFO_DATA], 1777 ops->policy); 1778 if (err < 0) 1779 return err; 1780 data = attr; 1781 } 1782 if (ops->validate) { 1783 err = ops->validate(tb, data); 1784 if (err < 0) 1785 return err; 1786 } 1787 } 1788 1789 if (dev) { 1790 int modified = 0; 1791 1792 if (nlh->nlmsg_flags & NLM_F_EXCL) 1793 return -EEXIST; 1794 if (nlh->nlmsg_flags & NLM_F_REPLACE) 1795 return -EOPNOTSUPP; 1796 1797 if (linkinfo[IFLA_INFO_DATA]) { 1798 if (!ops || ops != dev->rtnl_link_ops || 1799 !ops->changelink) 1800 return -EOPNOTSUPP; 1801 1802 err = ops->changelink(dev, tb, data); 1803 if (err < 0) 1804 return err; 1805 modified = 1; 1806 } 1807 1808 return do_setlink(dev, ifm, tb, ifname, modified); 1809 } 1810 1811 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 1812 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 1813 return rtnl_group_changelink(net, 1814 nla_get_u32(tb[IFLA_GROUP]), 1815 ifm, tb); 1816 return -ENODEV; 1817 } 1818 1819 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 1820 return -EOPNOTSUPP; 1821 1822 if (!ops) { 1823 #ifdef CONFIG_MODULES 1824 if (kind[0]) { 1825 __rtnl_unlock(); 1826 request_module("rtnl-link-%s", kind); 1827 rtnl_lock(); 1828 ops = rtnl_link_ops_get(kind); 1829 if (ops) 1830 goto replay; 1831 } 1832 #endif 1833 return -EOPNOTSUPP; 1834 } 1835 1836 if (!ifname[0]) 1837 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 1838 1839 dest_net = rtnl_link_get_net(net, tb); 1840 if (IS_ERR(dest_net)) 1841 return PTR_ERR(dest_net); 1842 1843 dev = rtnl_create_link(dest_net, ifname, ops, tb); 1844 if (IS_ERR(dev)) { 1845 err = PTR_ERR(dev); 1846 goto out; 1847 } 1848 1849 dev->ifindex = ifm->ifi_index; 1850 1851 if (ops->newlink) 1852 err = ops->newlink(net, dev, tb, data); 1853 else 1854 err = register_netdevice(dev); 1855 1856 if (err < 0 && !IS_ERR(dev)) 1857 free_netdev(dev); 1858 if (err < 0) 1859 goto out; 1860 1861 err = rtnl_configure_link(dev, ifm); 1862 if (err < 0) 1863 unregister_netdevice(dev); 1864 out: 1865 put_net(dest_net); 1866 return err; 1867 } 1868 } 1869 1870 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) 1871 { 1872 struct net *net = sock_net(skb->sk); 1873 struct ifinfomsg *ifm; 1874 char ifname[IFNAMSIZ]; 1875 struct nlattr *tb[IFLA_MAX+1]; 1876 struct net_device *dev = NULL; 1877 struct sk_buff *nskb; 1878 int err; 1879 u32 ext_filter_mask = 0; 1880 1881 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 1882 if (err < 0) 1883 return err; 1884 1885 if (tb[IFLA_IFNAME]) 1886 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 1887 1888 if (tb[IFLA_EXT_MASK]) 1889 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1890 1891 ifm = nlmsg_data(nlh); 1892 if (ifm->ifi_index > 0) 1893 dev = __dev_get_by_index(net, ifm->ifi_index); 1894 else if (tb[IFLA_IFNAME]) 1895 dev = __dev_get_by_name(net, ifname); 1896 else 1897 return -EINVAL; 1898 1899 if (dev == NULL) 1900 return -ENODEV; 1901 1902 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 1903 if (nskb == NULL) 1904 return -ENOBUFS; 1905 1906 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 1907 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 1908 if (err < 0) { 1909 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 1910 WARN_ON(err == -EMSGSIZE); 1911 kfree_skb(nskb); 1912 } else 1913 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 1914 1915 return err; 1916 } 1917 1918 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 1919 { 1920 struct net *net = sock_net(skb->sk); 1921 struct net_device *dev; 1922 struct nlattr *tb[IFLA_MAX+1]; 1923 u32 ext_filter_mask = 0; 1924 u16 min_ifinfo_dump_size = 0; 1925 1926 if (nlmsg_parse(nlh, sizeof(struct rtgenmsg), tb, IFLA_MAX, 1927 ifla_policy) >= 0) { 1928 if (tb[IFLA_EXT_MASK]) 1929 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1930 } 1931 1932 if (!ext_filter_mask) 1933 return NLMSG_GOODSIZE; 1934 /* 1935 * traverse the list of net devices and compute the minimum 1936 * buffer size based upon the filter mask. 1937 */ 1938 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 1939 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 1940 if_nlmsg_size(dev, 1941 ext_filter_mask)); 1942 } 1943 1944 return min_ifinfo_dump_size; 1945 } 1946 1947 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 1948 { 1949 int idx; 1950 int s_idx = cb->family; 1951 1952 if (s_idx == 0) 1953 s_idx = 1; 1954 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 1955 int type = cb->nlh->nlmsg_type-RTM_BASE; 1956 if (idx < s_idx || idx == PF_PACKET) 1957 continue; 1958 if (rtnl_msg_handlers[idx] == NULL || 1959 rtnl_msg_handlers[idx][type].dumpit == NULL) 1960 continue; 1961 if (idx > s_idx) 1962 memset(&cb->args[0], 0, sizeof(cb->args)); 1963 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 1964 break; 1965 } 1966 cb->family = idx; 1967 1968 return skb->len; 1969 } 1970 1971 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change) 1972 { 1973 struct net *net = dev_net(dev); 1974 struct sk_buff *skb; 1975 int err = -ENOBUFS; 1976 size_t if_info_size; 1977 1978 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), GFP_KERNEL); 1979 if (skb == NULL) 1980 goto errout; 1981 1982 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 1983 if (err < 0) { 1984 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 1985 WARN_ON(err == -EMSGSIZE); 1986 kfree_skb(skb); 1987 goto errout; 1988 } 1989 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_KERNEL); 1990 return; 1991 errout: 1992 if (err < 0) 1993 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 1994 } 1995 1996 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 1997 struct net_device *dev, 1998 u8 *addr, u32 pid, u32 seq, 1999 int type, unsigned int flags) 2000 { 2001 struct nlmsghdr *nlh; 2002 struct ndmsg *ndm; 2003 2004 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), NLM_F_MULTI); 2005 if (!nlh) 2006 return -EMSGSIZE; 2007 2008 ndm = nlmsg_data(nlh); 2009 ndm->ndm_family = AF_BRIDGE; 2010 ndm->ndm_pad1 = 0; 2011 ndm->ndm_pad2 = 0; 2012 ndm->ndm_flags = flags; 2013 ndm->ndm_type = 0; 2014 ndm->ndm_ifindex = dev->ifindex; 2015 ndm->ndm_state = NUD_PERMANENT; 2016 2017 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2018 goto nla_put_failure; 2019 2020 return nlmsg_end(skb, nlh); 2021 2022 nla_put_failure: 2023 nlmsg_cancel(skb, nlh); 2024 return -EMSGSIZE; 2025 } 2026 2027 static inline size_t rtnl_fdb_nlmsg_size(void) 2028 { 2029 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2030 } 2031 2032 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, int type) 2033 { 2034 struct net *net = dev_net(dev); 2035 struct sk_buff *skb; 2036 int err = -ENOBUFS; 2037 2038 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2039 if (!skb) 2040 goto errout; 2041 2042 err = nlmsg_populate_fdb_fill(skb, dev, addr, 0, 0, type, NTF_SELF); 2043 if (err < 0) { 2044 kfree_skb(skb); 2045 goto errout; 2046 } 2047 2048 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2049 return; 2050 errout: 2051 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2052 } 2053 2054 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 2055 { 2056 struct net *net = sock_net(skb->sk); 2057 struct net_device *master = NULL; 2058 struct ndmsg *ndm; 2059 struct nlattr *tb[NDA_MAX+1]; 2060 struct net_device *dev; 2061 u8 *addr; 2062 int err; 2063 2064 if (!capable(CAP_NET_ADMIN)) 2065 return -EPERM; 2066 2067 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2068 if (err < 0) 2069 return err; 2070 2071 ndm = nlmsg_data(nlh); 2072 if (ndm->ndm_ifindex == 0) { 2073 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2074 return -EINVAL; 2075 } 2076 2077 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2078 if (dev == NULL) { 2079 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2080 return -ENODEV; 2081 } 2082 2083 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2084 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2085 return -EINVAL; 2086 } 2087 2088 addr = nla_data(tb[NDA_LLADDR]); 2089 if (!is_valid_ether_addr(addr)) { 2090 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ether address\n"); 2091 return -EINVAL; 2092 } 2093 2094 err = -EOPNOTSUPP; 2095 2096 /* Support fdb on master device the net/bridge default case */ 2097 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2098 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2099 master = dev->master; 2100 err = master->netdev_ops->ndo_fdb_add(ndm, tb, 2101 dev, addr, 2102 nlh->nlmsg_flags); 2103 if (err) 2104 goto out; 2105 else 2106 ndm->ndm_flags &= ~NTF_MASTER; 2107 } 2108 2109 /* Embedded bridge, macvlan, and any other device support */ 2110 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_add) { 2111 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, 2112 dev, addr, 2113 nlh->nlmsg_flags); 2114 2115 if (!err) { 2116 rtnl_fdb_notify(dev, addr, RTM_NEWNEIGH); 2117 ndm->ndm_flags &= ~NTF_SELF; 2118 } 2119 } 2120 out: 2121 return err; 2122 } 2123 2124 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, void *arg) 2125 { 2126 struct net *net = sock_net(skb->sk); 2127 struct ndmsg *ndm; 2128 struct nlattr *llattr; 2129 struct net_device *dev; 2130 int err = -EINVAL; 2131 __u8 *addr; 2132 2133 if (!capable(CAP_NET_ADMIN)) 2134 return -EPERM; 2135 2136 if (nlmsg_len(nlh) < sizeof(*ndm)) 2137 return -EINVAL; 2138 2139 ndm = nlmsg_data(nlh); 2140 if (ndm->ndm_ifindex == 0) { 2141 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2142 return -EINVAL; 2143 } 2144 2145 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2146 if (dev == NULL) { 2147 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2148 return -ENODEV; 2149 } 2150 2151 llattr = nlmsg_find_attr(nlh, sizeof(*ndm), NDA_LLADDR); 2152 if (llattr == NULL || nla_len(llattr) != ETH_ALEN) { 2153 pr_info("PF_BRIGDE: RTM_DELNEIGH with invalid address\n"); 2154 return -EINVAL; 2155 } 2156 2157 addr = nla_data(llattr); 2158 err = -EOPNOTSUPP; 2159 2160 /* Support fdb on master device the net/bridge default case */ 2161 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2162 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2163 struct net_device *master = dev->master; 2164 2165 if (master->netdev_ops->ndo_fdb_del) 2166 err = master->netdev_ops->ndo_fdb_del(ndm, dev, addr); 2167 2168 if (err) 2169 goto out; 2170 else 2171 ndm->ndm_flags &= ~NTF_MASTER; 2172 } 2173 2174 /* Embedded bridge, macvlan, and any other device support */ 2175 if ((ndm->ndm_flags & NTF_SELF) && dev->netdev_ops->ndo_fdb_del) { 2176 err = dev->netdev_ops->ndo_fdb_del(ndm, dev, addr); 2177 2178 if (!err) { 2179 rtnl_fdb_notify(dev, addr, RTM_DELNEIGH); 2180 ndm->ndm_flags &= ~NTF_SELF; 2181 } 2182 } 2183 out: 2184 return err; 2185 } 2186 2187 static int nlmsg_populate_fdb(struct sk_buff *skb, 2188 struct netlink_callback *cb, 2189 struct net_device *dev, 2190 int *idx, 2191 struct netdev_hw_addr_list *list) 2192 { 2193 struct netdev_hw_addr *ha; 2194 int err; 2195 u32 portid, seq; 2196 2197 portid = NETLINK_CB(cb->skb).portid; 2198 seq = cb->nlh->nlmsg_seq; 2199 2200 list_for_each_entry(ha, &list->list, list) { 2201 if (*idx < cb->args[0]) 2202 goto skip; 2203 2204 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 2205 portid, seq, 2206 RTM_NEWNEIGH, NTF_SELF); 2207 if (err < 0) 2208 return err; 2209 skip: 2210 *idx += 1; 2211 } 2212 return 0; 2213 } 2214 2215 /** 2216 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2217 * @nlh: netlink message header 2218 * @dev: netdevice 2219 * 2220 * Default netdevice operation to dump the existing unicast address list. 2221 * Returns zero on success. 2222 */ 2223 int ndo_dflt_fdb_dump(struct sk_buff *skb, 2224 struct netlink_callback *cb, 2225 struct net_device *dev, 2226 int idx) 2227 { 2228 int err; 2229 2230 netif_addr_lock_bh(dev); 2231 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 2232 if (err) 2233 goto out; 2234 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 2235 out: 2236 netif_addr_unlock_bh(dev); 2237 return idx; 2238 } 2239 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 2240 2241 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 2242 { 2243 int idx = 0; 2244 struct net *net = sock_net(skb->sk); 2245 struct net_device *dev; 2246 2247 rcu_read_lock(); 2248 for_each_netdev_rcu(net, dev) { 2249 if (dev->priv_flags & IFF_BRIDGE_PORT) { 2250 struct net_device *master = dev->master; 2251 const struct net_device_ops *ops = master->netdev_ops; 2252 2253 if (ops->ndo_fdb_dump) 2254 idx = ops->ndo_fdb_dump(skb, cb, dev, idx); 2255 } 2256 2257 if (dev->netdev_ops->ndo_fdb_dump) 2258 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, idx); 2259 } 2260 rcu_read_unlock(); 2261 2262 cb->args[0] = idx; 2263 return skb->len; 2264 } 2265 2266 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 2267 struct net_device *dev, u16 mode) 2268 { 2269 struct nlmsghdr *nlh; 2270 struct ifinfomsg *ifm; 2271 struct nlattr *br_afspec; 2272 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 2273 2274 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), NLM_F_MULTI); 2275 if (nlh == NULL) 2276 return -EMSGSIZE; 2277 2278 ifm = nlmsg_data(nlh); 2279 ifm->ifi_family = AF_BRIDGE; 2280 ifm->__ifi_pad = 0; 2281 ifm->ifi_type = dev->type; 2282 ifm->ifi_index = dev->ifindex; 2283 ifm->ifi_flags = dev_get_flags(dev); 2284 ifm->ifi_change = 0; 2285 2286 2287 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 2288 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 2289 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 2290 (dev->master && 2291 nla_put_u32(skb, IFLA_MASTER, dev->master->ifindex)) || 2292 (dev->addr_len && 2293 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 2294 (dev->ifindex != dev->iflink && 2295 nla_put_u32(skb, IFLA_LINK, dev->iflink))) 2296 goto nla_put_failure; 2297 2298 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 2299 if (!br_afspec) 2300 goto nla_put_failure; 2301 2302 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF) || 2303 nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 2304 nla_nest_cancel(skb, br_afspec); 2305 goto nla_put_failure; 2306 } 2307 nla_nest_end(skb, br_afspec); 2308 2309 return nlmsg_end(skb, nlh); 2310 nla_put_failure: 2311 nlmsg_cancel(skb, nlh); 2312 return -EMSGSIZE; 2313 } 2314 EXPORT_SYMBOL(ndo_dflt_bridge_getlink); 2315 2316 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 2317 { 2318 struct net *net = sock_net(skb->sk); 2319 struct net_device *dev; 2320 int idx = 0; 2321 u32 portid = NETLINK_CB(cb->skb).portid; 2322 u32 seq = cb->nlh->nlmsg_seq; 2323 2324 rcu_read_lock(); 2325 for_each_netdev_rcu(net, dev) { 2326 const struct net_device_ops *ops = dev->netdev_ops; 2327 struct net_device *master = dev->master; 2328 2329 if (master && master->netdev_ops->ndo_bridge_getlink) { 2330 if (idx >= cb->args[0] && 2331 master->netdev_ops->ndo_bridge_getlink( 2332 skb, portid, seq, dev) < 0) 2333 break; 2334 idx++; 2335 } 2336 2337 if (ops->ndo_bridge_getlink) { 2338 if (idx >= cb->args[0] && 2339 ops->ndo_bridge_getlink(skb, portid, seq, dev) < 0) 2340 break; 2341 idx++; 2342 } 2343 } 2344 rcu_read_unlock(); 2345 cb->args[0] = idx; 2346 2347 return skb->len; 2348 } 2349 2350 static inline size_t bridge_nlmsg_size(void) 2351 { 2352 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 2353 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 2354 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 2355 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 2356 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 2357 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 2358 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 2359 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 2360 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 2361 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 2362 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 2363 } 2364 2365 static int rtnl_bridge_notify(struct net_device *dev, u16 flags) 2366 { 2367 struct net *net = dev_net(dev); 2368 struct net_device *master = dev->master; 2369 struct sk_buff *skb; 2370 int err = -EOPNOTSUPP; 2371 2372 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 2373 if (!skb) { 2374 err = -ENOMEM; 2375 goto errout; 2376 } 2377 2378 if ((!flags || (flags & BRIDGE_FLAGS_MASTER)) && 2379 master && master->netdev_ops->ndo_bridge_getlink) { 2380 err = master->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev); 2381 if (err < 0) 2382 goto errout; 2383 } 2384 2385 if ((flags & BRIDGE_FLAGS_SELF) && 2386 dev->netdev_ops->ndo_bridge_getlink) { 2387 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev); 2388 if (err < 0) 2389 goto errout; 2390 } 2391 2392 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 2393 return 0; 2394 errout: 2395 WARN_ON(err == -EMSGSIZE); 2396 kfree_skb(skb); 2397 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2398 return err; 2399 } 2400 2401 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2402 void *arg) 2403 { 2404 struct net *net = sock_net(skb->sk); 2405 struct ifinfomsg *ifm; 2406 struct net_device *dev; 2407 struct nlattr *br_spec, *attr = NULL; 2408 int rem, err = -EOPNOTSUPP; 2409 u16 oflags, flags = 0; 2410 bool have_flags = false; 2411 2412 if (nlmsg_len(nlh) < sizeof(*ifm)) 2413 return -EINVAL; 2414 2415 ifm = nlmsg_data(nlh); 2416 if (ifm->ifi_family != AF_BRIDGE) 2417 return -EPFNOSUPPORT; 2418 2419 dev = __dev_get_by_index(net, ifm->ifi_index); 2420 if (!dev) { 2421 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 2422 return -ENODEV; 2423 } 2424 2425 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 2426 if (br_spec) { 2427 nla_for_each_nested(attr, br_spec, rem) { 2428 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 2429 have_flags = true; 2430 flags = nla_get_u16(attr); 2431 break; 2432 } 2433 } 2434 } 2435 2436 oflags = flags; 2437 2438 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 2439 if (!dev->master || 2440 !dev->master->netdev_ops->ndo_bridge_setlink) { 2441 err = -EOPNOTSUPP; 2442 goto out; 2443 } 2444 2445 err = dev->master->netdev_ops->ndo_bridge_setlink(dev, nlh); 2446 if (err) 2447 goto out; 2448 2449 flags &= ~BRIDGE_FLAGS_MASTER; 2450 } 2451 2452 if ((flags & BRIDGE_FLAGS_SELF)) { 2453 if (!dev->netdev_ops->ndo_bridge_setlink) 2454 err = -EOPNOTSUPP; 2455 else 2456 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh); 2457 2458 if (!err) 2459 flags &= ~BRIDGE_FLAGS_SELF; 2460 } 2461 2462 if (have_flags) 2463 memcpy(nla_data(attr), &flags, sizeof(flags)); 2464 /* Generate event to notify upper layer of bridge change */ 2465 if (!err) 2466 err = rtnl_bridge_notify(dev, oflags); 2467 out: 2468 return err; 2469 } 2470 2471 /* Protected by RTNL sempahore. */ 2472 static struct rtattr **rta_buf; 2473 static int rtattr_max; 2474 2475 /* Process one rtnetlink message. */ 2476 2477 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 2478 { 2479 struct net *net = sock_net(skb->sk); 2480 rtnl_doit_func doit; 2481 int sz_idx, kind; 2482 int min_len; 2483 int family; 2484 int type; 2485 int err; 2486 2487 type = nlh->nlmsg_type; 2488 if (type > RTM_MAX) 2489 return -EOPNOTSUPP; 2490 2491 type -= RTM_BASE; 2492 2493 /* All the messages must have at least 1 byte length */ 2494 if (nlh->nlmsg_len < NLMSG_LENGTH(sizeof(struct rtgenmsg))) 2495 return 0; 2496 2497 family = ((struct rtgenmsg *)NLMSG_DATA(nlh))->rtgen_family; 2498 sz_idx = type>>2; 2499 kind = type&3; 2500 2501 if (kind != 2 && !ns_capable(net->user_ns, CAP_NET_ADMIN)) 2502 return -EPERM; 2503 2504 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 2505 struct sock *rtnl; 2506 rtnl_dumpit_func dumpit; 2507 rtnl_calcit_func calcit; 2508 u16 min_dump_alloc = 0; 2509 2510 dumpit = rtnl_get_dumpit(family, type); 2511 if (dumpit == NULL) 2512 return -EOPNOTSUPP; 2513 calcit = rtnl_get_calcit(family, type); 2514 if (calcit) 2515 min_dump_alloc = calcit(skb, nlh); 2516 2517 __rtnl_unlock(); 2518 rtnl = net->rtnl; 2519 { 2520 struct netlink_dump_control c = { 2521 .dump = dumpit, 2522 .min_dump_alloc = min_dump_alloc, 2523 }; 2524 err = netlink_dump_start(rtnl, skb, nlh, &c); 2525 } 2526 rtnl_lock(); 2527 return err; 2528 } 2529 2530 memset(rta_buf, 0, (rtattr_max * sizeof(struct rtattr *))); 2531 2532 min_len = rtm_min[sz_idx]; 2533 if (nlh->nlmsg_len < min_len) 2534 return -EINVAL; 2535 2536 if (nlh->nlmsg_len > min_len) { 2537 int attrlen = nlh->nlmsg_len - NLMSG_ALIGN(min_len); 2538 struct rtattr *attr = (void *)nlh + NLMSG_ALIGN(min_len); 2539 2540 while (RTA_OK(attr, attrlen)) { 2541 unsigned int flavor = attr->rta_type; 2542 if (flavor) { 2543 if (flavor > rta_max[sz_idx]) 2544 return -EINVAL; 2545 rta_buf[flavor-1] = attr; 2546 } 2547 attr = RTA_NEXT(attr, attrlen); 2548 } 2549 } 2550 2551 doit = rtnl_get_doit(family, type); 2552 if (doit == NULL) 2553 return -EOPNOTSUPP; 2554 2555 return doit(skb, nlh, (void *)&rta_buf[0]); 2556 } 2557 2558 static void rtnetlink_rcv(struct sk_buff *skb) 2559 { 2560 rtnl_lock(); 2561 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 2562 rtnl_unlock(); 2563 } 2564 2565 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 2566 { 2567 struct net_device *dev = ptr; 2568 2569 switch (event) { 2570 case NETDEV_UP: 2571 case NETDEV_DOWN: 2572 case NETDEV_PRE_UP: 2573 case NETDEV_POST_INIT: 2574 case NETDEV_REGISTER: 2575 case NETDEV_CHANGE: 2576 case NETDEV_PRE_TYPE_CHANGE: 2577 case NETDEV_GOING_DOWN: 2578 case NETDEV_UNREGISTER: 2579 case NETDEV_UNREGISTER_FINAL: 2580 case NETDEV_RELEASE: 2581 case NETDEV_JOIN: 2582 break; 2583 default: 2584 rtmsg_ifinfo(RTM_NEWLINK, dev, 0); 2585 break; 2586 } 2587 return NOTIFY_DONE; 2588 } 2589 2590 static struct notifier_block rtnetlink_dev_notifier = { 2591 .notifier_call = rtnetlink_event, 2592 }; 2593 2594 2595 static int __net_init rtnetlink_net_init(struct net *net) 2596 { 2597 struct sock *sk; 2598 struct netlink_kernel_cfg cfg = { 2599 .groups = RTNLGRP_MAX, 2600 .input = rtnetlink_rcv, 2601 .cb_mutex = &rtnl_mutex, 2602 .flags = NL_CFG_F_NONROOT_RECV, 2603 }; 2604 2605 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 2606 if (!sk) 2607 return -ENOMEM; 2608 net->rtnl = sk; 2609 return 0; 2610 } 2611 2612 static void __net_exit rtnetlink_net_exit(struct net *net) 2613 { 2614 netlink_kernel_release(net->rtnl); 2615 net->rtnl = NULL; 2616 } 2617 2618 static struct pernet_operations rtnetlink_net_ops = { 2619 .init = rtnetlink_net_init, 2620 .exit = rtnetlink_net_exit, 2621 }; 2622 2623 void __init rtnetlink_init(void) 2624 { 2625 int i; 2626 2627 rtattr_max = 0; 2628 for (i = 0; i < ARRAY_SIZE(rta_max); i++) 2629 if (rta_max[i] > rtattr_max) 2630 rtattr_max = rta_max[i]; 2631 rta_buf = kmalloc(rtattr_max * sizeof(struct rtattr *), GFP_KERNEL); 2632 if (!rta_buf) 2633 panic("rtnetlink_init: cannot allocate rta_buf\n"); 2634 2635 if (register_pernet_subsys(&rtnetlink_net_ops)) 2636 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 2637 2638 register_netdevice_notifier(&rtnetlink_dev_notifier); 2639 2640 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 2641 rtnl_dump_ifinfo, rtnl_calcit); 2642 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 2643 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 2644 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 2645 2646 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 2647 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 2648 2649 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 2650 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 2651 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 2652 2653 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 2654 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 2655 } 2656 2657