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/if_vlan.h> 40 #include <linux/pci.h> 41 #include <linux/etherdevice.h> 42 43 #include <asm/uaccess.h> 44 45 #include <linux/inet.h> 46 #include <linux/netdevice.h> 47 #include <net/switchdev.h> 48 #include <net/ip.h> 49 #include <net/protocol.h> 50 #include <net/arp.h> 51 #include <net/route.h> 52 #include <net/udp.h> 53 #include <net/tcp.h> 54 #include <net/sock.h> 55 #include <net/pkt_sched.h> 56 #include <net/fib_rules.h> 57 #include <net/rtnetlink.h> 58 #include <net/net_namespace.h> 59 60 struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 rtnl_calcit_func calcit; 64 }; 65 66 static DEFINE_MUTEX(rtnl_mutex); 67 68 void rtnl_lock(void) 69 { 70 mutex_lock(&rtnl_mutex); 71 } 72 EXPORT_SYMBOL(rtnl_lock); 73 74 void __rtnl_unlock(void) 75 { 76 mutex_unlock(&rtnl_mutex); 77 } 78 79 void rtnl_unlock(void) 80 { 81 /* This fellow will unlock it for us. */ 82 netdev_run_todo(); 83 } 84 EXPORT_SYMBOL(rtnl_unlock); 85 86 int rtnl_trylock(void) 87 { 88 return mutex_trylock(&rtnl_mutex); 89 } 90 EXPORT_SYMBOL(rtnl_trylock); 91 92 int rtnl_is_locked(void) 93 { 94 return mutex_is_locked(&rtnl_mutex); 95 } 96 EXPORT_SYMBOL(rtnl_is_locked); 97 98 #ifdef CONFIG_PROVE_LOCKING 99 bool lockdep_rtnl_is_held(void) 100 { 101 return lockdep_is_held(&rtnl_mutex); 102 } 103 EXPORT_SYMBOL(lockdep_rtnl_is_held); 104 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 105 106 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 107 108 static inline int rtm_msgindex(int msgtype) 109 { 110 int msgindex = msgtype - RTM_BASE; 111 112 /* 113 * msgindex < 0 implies someone tried to register a netlink 114 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 115 * the message type has not been added to linux/rtnetlink.h 116 */ 117 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 118 119 return msgindex; 120 } 121 122 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 123 { 124 struct rtnl_link *tab; 125 126 if (protocol <= RTNL_FAMILY_MAX) 127 tab = rtnl_msg_handlers[protocol]; 128 else 129 tab = NULL; 130 131 if (tab == NULL || tab[msgindex].doit == NULL) 132 tab = rtnl_msg_handlers[PF_UNSPEC]; 133 134 return tab[msgindex].doit; 135 } 136 137 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 138 { 139 struct rtnl_link *tab; 140 141 if (protocol <= RTNL_FAMILY_MAX) 142 tab = rtnl_msg_handlers[protocol]; 143 else 144 tab = NULL; 145 146 if (tab == NULL || tab[msgindex].dumpit == NULL) 147 tab = rtnl_msg_handlers[PF_UNSPEC]; 148 149 return tab[msgindex].dumpit; 150 } 151 152 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 153 { 154 struct rtnl_link *tab; 155 156 if (protocol <= RTNL_FAMILY_MAX) 157 tab = rtnl_msg_handlers[protocol]; 158 else 159 tab = NULL; 160 161 if (tab == NULL || tab[msgindex].calcit == NULL) 162 tab = rtnl_msg_handlers[PF_UNSPEC]; 163 164 return tab[msgindex].calcit; 165 } 166 167 /** 168 * __rtnl_register - Register a rtnetlink message type 169 * @protocol: Protocol family or PF_UNSPEC 170 * @msgtype: rtnetlink message type 171 * @doit: Function pointer called for each request message 172 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 173 * @calcit: Function pointer to calc size of dump message 174 * 175 * Registers the specified function pointers (at least one of them has 176 * to be non-NULL) to be called whenever a request message for the 177 * specified protocol family and message type is received. 178 * 179 * The special protocol family PF_UNSPEC may be used to define fallback 180 * function pointers for the case when no entry for the specific protocol 181 * family exists. 182 * 183 * Returns 0 on success or a negative error code. 184 */ 185 int __rtnl_register(int protocol, int msgtype, 186 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 187 rtnl_calcit_func calcit) 188 { 189 struct rtnl_link *tab; 190 int msgindex; 191 192 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 193 msgindex = rtm_msgindex(msgtype); 194 195 tab = rtnl_msg_handlers[protocol]; 196 if (tab == NULL) { 197 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 198 if (tab == NULL) 199 return -ENOBUFS; 200 201 rtnl_msg_handlers[protocol] = tab; 202 } 203 204 if (doit) 205 tab[msgindex].doit = doit; 206 207 if (dumpit) 208 tab[msgindex].dumpit = dumpit; 209 210 if (calcit) 211 tab[msgindex].calcit = calcit; 212 213 return 0; 214 } 215 EXPORT_SYMBOL_GPL(__rtnl_register); 216 217 /** 218 * rtnl_register - Register a rtnetlink message type 219 * 220 * Identical to __rtnl_register() but panics on failure. This is useful 221 * as failure of this function is very unlikely, it can only happen due 222 * to lack of memory when allocating the chain to store all message 223 * handlers for a protocol. Meant for use in init functions where lack 224 * of memory implies no sense in continuing. 225 */ 226 void rtnl_register(int protocol, int msgtype, 227 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 228 rtnl_calcit_func calcit) 229 { 230 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 231 panic("Unable to register rtnetlink message handler, " 232 "protocol = %d, message type = %d\n", 233 protocol, msgtype); 234 } 235 EXPORT_SYMBOL_GPL(rtnl_register); 236 237 /** 238 * rtnl_unregister - Unregister a rtnetlink message type 239 * @protocol: Protocol family or PF_UNSPEC 240 * @msgtype: rtnetlink message type 241 * 242 * Returns 0 on success or a negative error code. 243 */ 244 int rtnl_unregister(int protocol, int msgtype) 245 { 246 int msgindex; 247 248 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 249 msgindex = rtm_msgindex(msgtype); 250 251 if (rtnl_msg_handlers[protocol] == NULL) 252 return -ENOENT; 253 254 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 255 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 256 257 return 0; 258 } 259 EXPORT_SYMBOL_GPL(rtnl_unregister); 260 261 /** 262 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 263 * @protocol : Protocol family or PF_UNSPEC 264 * 265 * Identical to calling rtnl_unregster() for all registered message types 266 * of a certain protocol family. 267 */ 268 void rtnl_unregister_all(int protocol) 269 { 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 271 272 kfree(rtnl_msg_handlers[protocol]); 273 rtnl_msg_handlers[protocol] = NULL; 274 } 275 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 276 277 static LIST_HEAD(link_ops); 278 279 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 280 { 281 const struct rtnl_link_ops *ops; 282 283 list_for_each_entry(ops, &link_ops, list) { 284 if (!strcmp(ops->kind, kind)) 285 return ops; 286 } 287 return NULL; 288 } 289 290 /** 291 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 292 * @ops: struct rtnl_link_ops * to register 293 * 294 * The caller must hold the rtnl_mutex. This function should be used 295 * by drivers that create devices during module initialization. It 296 * must be called before registering the devices. 297 * 298 * Returns 0 on success or a negative error code. 299 */ 300 int __rtnl_link_register(struct rtnl_link_ops *ops) 301 { 302 if (rtnl_link_ops_get(ops->kind)) 303 return -EEXIST; 304 305 /* The check for setup is here because if ops 306 * does not have that filled up, it is not possible 307 * to use the ops for creating device. So do not 308 * fill up dellink as well. That disables rtnl_dellink. 309 */ 310 if (ops->setup && !ops->dellink) 311 ops->dellink = unregister_netdevice_queue; 312 313 list_add_tail(&ops->list, &link_ops); 314 return 0; 315 } 316 EXPORT_SYMBOL_GPL(__rtnl_link_register); 317 318 /** 319 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 320 * @ops: struct rtnl_link_ops * to register 321 * 322 * Returns 0 on success or a negative error code. 323 */ 324 int rtnl_link_register(struct rtnl_link_ops *ops) 325 { 326 int err; 327 328 rtnl_lock(); 329 err = __rtnl_link_register(ops); 330 rtnl_unlock(); 331 return err; 332 } 333 EXPORT_SYMBOL_GPL(rtnl_link_register); 334 335 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 336 { 337 struct net_device *dev; 338 LIST_HEAD(list_kill); 339 340 for_each_netdev(net, dev) { 341 if (dev->rtnl_link_ops == ops) 342 ops->dellink(dev, &list_kill); 343 } 344 unregister_netdevice_many(&list_kill); 345 } 346 347 /** 348 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 349 * @ops: struct rtnl_link_ops * to unregister 350 * 351 * The caller must hold the rtnl_mutex. 352 */ 353 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 354 { 355 struct net *net; 356 357 for_each_net(net) { 358 __rtnl_kill_links(net, ops); 359 } 360 list_del(&ops->list); 361 } 362 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 363 364 /* Return with the rtnl_lock held when there are no network 365 * devices unregistering in any network namespace. 366 */ 367 static void rtnl_lock_unregistering_all(void) 368 { 369 struct net *net; 370 bool unregistering; 371 DEFINE_WAIT_FUNC(wait, woken_wake_function); 372 373 add_wait_queue(&netdev_unregistering_wq, &wait); 374 for (;;) { 375 unregistering = false; 376 rtnl_lock(); 377 for_each_net(net) { 378 if (net->dev_unreg_count > 0) { 379 unregistering = true; 380 break; 381 } 382 } 383 if (!unregistering) 384 break; 385 __rtnl_unlock(); 386 387 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 388 } 389 remove_wait_queue(&netdev_unregistering_wq, &wait); 390 } 391 392 /** 393 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 394 * @ops: struct rtnl_link_ops * to unregister 395 */ 396 void rtnl_link_unregister(struct rtnl_link_ops *ops) 397 { 398 /* Close the race with cleanup_net() */ 399 mutex_lock(&net_mutex); 400 rtnl_lock_unregistering_all(); 401 __rtnl_link_unregister(ops); 402 rtnl_unlock(); 403 mutex_unlock(&net_mutex); 404 } 405 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 406 407 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 408 { 409 struct net_device *master_dev; 410 const struct rtnl_link_ops *ops; 411 412 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 413 if (!master_dev) 414 return 0; 415 ops = master_dev->rtnl_link_ops; 416 if (!ops || !ops->get_slave_size) 417 return 0; 418 /* IFLA_INFO_SLAVE_DATA + nested data */ 419 return nla_total_size(sizeof(struct nlattr)) + 420 ops->get_slave_size(master_dev, dev); 421 } 422 423 static size_t rtnl_link_get_size(const struct net_device *dev) 424 { 425 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 426 size_t size; 427 428 if (!ops) 429 return 0; 430 431 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 432 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 433 434 if (ops->get_size) 435 /* IFLA_INFO_DATA + nested data */ 436 size += nla_total_size(sizeof(struct nlattr)) + 437 ops->get_size(dev); 438 439 if (ops->get_xstats_size) 440 /* IFLA_INFO_XSTATS */ 441 size += nla_total_size(ops->get_xstats_size(dev)); 442 443 size += rtnl_link_get_slave_info_data_size(dev); 444 445 return size; 446 } 447 448 static LIST_HEAD(rtnl_af_ops); 449 450 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 451 { 452 const struct rtnl_af_ops *ops; 453 454 list_for_each_entry(ops, &rtnl_af_ops, list) { 455 if (ops->family == family) 456 return ops; 457 } 458 459 return NULL; 460 } 461 462 /** 463 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 464 * @ops: struct rtnl_af_ops * to register 465 * 466 * Returns 0 on success or a negative error code. 467 */ 468 void rtnl_af_register(struct rtnl_af_ops *ops) 469 { 470 rtnl_lock(); 471 list_add_tail(&ops->list, &rtnl_af_ops); 472 rtnl_unlock(); 473 } 474 EXPORT_SYMBOL_GPL(rtnl_af_register); 475 476 /** 477 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 478 * @ops: struct rtnl_af_ops * to unregister 479 * 480 * The caller must hold the rtnl_mutex. 481 */ 482 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 483 { 484 list_del(&ops->list); 485 } 486 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 487 488 /** 489 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 490 * @ops: struct rtnl_af_ops * to unregister 491 */ 492 void rtnl_af_unregister(struct rtnl_af_ops *ops) 493 { 494 rtnl_lock(); 495 __rtnl_af_unregister(ops); 496 rtnl_unlock(); 497 } 498 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 499 500 static size_t rtnl_link_get_af_size(const struct net_device *dev, 501 u32 ext_filter_mask) 502 { 503 struct rtnl_af_ops *af_ops; 504 size_t size; 505 506 /* IFLA_AF_SPEC */ 507 size = nla_total_size(sizeof(struct nlattr)); 508 509 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 510 if (af_ops->get_link_af_size) { 511 /* AF_* + nested data */ 512 size += nla_total_size(sizeof(struct nlattr)) + 513 af_ops->get_link_af_size(dev, ext_filter_mask); 514 } 515 } 516 517 return size; 518 } 519 520 static bool rtnl_have_link_slave_info(const struct net_device *dev) 521 { 522 struct net_device *master_dev; 523 524 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 525 if (master_dev && master_dev->rtnl_link_ops) 526 return true; 527 return false; 528 } 529 530 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 531 const struct net_device *dev) 532 { 533 struct net_device *master_dev; 534 const struct rtnl_link_ops *ops; 535 struct nlattr *slave_data; 536 int err; 537 538 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 539 if (!master_dev) 540 return 0; 541 ops = master_dev->rtnl_link_ops; 542 if (!ops) 543 return 0; 544 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 545 return -EMSGSIZE; 546 if (ops->fill_slave_info) { 547 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 548 if (!slave_data) 549 return -EMSGSIZE; 550 err = ops->fill_slave_info(skb, master_dev, dev); 551 if (err < 0) 552 goto err_cancel_slave_data; 553 nla_nest_end(skb, slave_data); 554 } 555 return 0; 556 557 err_cancel_slave_data: 558 nla_nest_cancel(skb, slave_data); 559 return err; 560 } 561 562 static int rtnl_link_info_fill(struct sk_buff *skb, 563 const struct net_device *dev) 564 { 565 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 566 struct nlattr *data; 567 int err; 568 569 if (!ops) 570 return 0; 571 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 572 return -EMSGSIZE; 573 if (ops->fill_xstats) { 574 err = ops->fill_xstats(skb, dev); 575 if (err < 0) 576 return err; 577 } 578 if (ops->fill_info) { 579 data = nla_nest_start(skb, IFLA_INFO_DATA); 580 if (data == NULL) 581 return -EMSGSIZE; 582 err = ops->fill_info(skb, dev); 583 if (err < 0) 584 goto err_cancel_data; 585 nla_nest_end(skb, data); 586 } 587 return 0; 588 589 err_cancel_data: 590 nla_nest_cancel(skb, data); 591 return err; 592 } 593 594 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 595 { 596 struct nlattr *linkinfo; 597 int err = -EMSGSIZE; 598 599 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 600 if (linkinfo == NULL) 601 goto out; 602 603 err = rtnl_link_info_fill(skb, dev); 604 if (err < 0) 605 goto err_cancel_link; 606 607 err = rtnl_link_slave_info_fill(skb, dev); 608 if (err < 0) 609 goto err_cancel_link; 610 611 nla_nest_end(skb, linkinfo); 612 return 0; 613 614 err_cancel_link: 615 nla_nest_cancel(skb, linkinfo); 616 out: 617 return err; 618 } 619 620 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 621 { 622 struct sock *rtnl = net->rtnl; 623 int err = 0; 624 625 NETLINK_CB(skb).dst_group = group; 626 if (echo) 627 atomic_inc(&skb->users); 628 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 629 if (echo) 630 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 631 return err; 632 } 633 634 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 635 { 636 struct sock *rtnl = net->rtnl; 637 638 return nlmsg_unicast(rtnl, skb, pid); 639 } 640 EXPORT_SYMBOL(rtnl_unicast); 641 642 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 643 struct nlmsghdr *nlh, gfp_t flags) 644 { 645 struct sock *rtnl = net->rtnl; 646 int report = 0; 647 648 if (nlh) 649 report = nlmsg_report(nlh); 650 651 nlmsg_notify(rtnl, skb, pid, group, report, flags); 652 } 653 EXPORT_SYMBOL(rtnl_notify); 654 655 void rtnl_set_sk_err(struct net *net, u32 group, int error) 656 { 657 struct sock *rtnl = net->rtnl; 658 659 netlink_set_err(rtnl, 0, group, error); 660 } 661 EXPORT_SYMBOL(rtnl_set_sk_err); 662 663 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 664 { 665 struct nlattr *mx; 666 int i, valid = 0; 667 668 mx = nla_nest_start(skb, RTA_METRICS); 669 if (mx == NULL) 670 return -ENOBUFS; 671 672 for (i = 0; i < RTAX_MAX; i++) { 673 if (metrics[i]) { 674 if (i == RTAX_CC_ALGO - 1) { 675 char tmp[TCP_CA_NAME_MAX], *name; 676 677 name = tcp_ca_get_name_by_key(metrics[i], tmp); 678 if (!name) 679 continue; 680 if (nla_put_string(skb, i + 1, name)) 681 goto nla_put_failure; 682 } else if (i == RTAX_FEATURES - 1) { 683 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 684 685 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 686 if (nla_put_u32(skb, i + 1, user_features)) 687 goto nla_put_failure; 688 } else { 689 if (nla_put_u32(skb, i + 1, metrics[i])) 690 goto nla_put_failure; 691 } 692 valid++; 693 } 694 } 695 696 if (!valid) { 697 nla_nest_cancel(skb, mx); 698 return 0; 699 } 700 701 return nla_nest_end(skb, mx); 702 703 nla_put_failure: 704 nla_nest_cancel(skb, mx); 705 return -EMSGSIZE; 706 } 707 EXPORT_SYMBOL(rtnetlink_put_metrics); 708 709 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 710 long expires, u32 error) 711 { 712 struct rta_cacheinfo ci = { 713 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 714 .rta_used = dst->__use, 715 .rta_clntref = atomic_read(&(dst->__refcnt)), 716 .rta_error = error, 717 .rta_id = id, 718 }; 719 720 if (expires) { 721 unsigned long clock; 722 723 clock = jiffies_to_clock_t(abs(expires)); 724 clock = min_t(unsigned long, clock, INT_MAX); 725 ci.rta_expires = (expires > 0) ? clock : -clock; 726 } 727 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 728 } 729 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 730 731 static void set_operstate(struct net_device *dev, unsigned char transition) 732 { 733 unsigned char operstate = dev->operstate; 734 735 switch (transition) { 736 case IF_OPER_UP: 737 if ((operstate == IF_OPER_DORMANT || 738 operstate == IF_OPER_UNKNOWN) && 739 !netif_dormant(dev)) 740 operstate = IF_OPER_UP; 741 break; 742 743 case IF_OPER_DORMANT: 744 if (operstate == IF_OPER_UP || 745 operstate == IF_OPER_UNKNOWN) 746 operstate = IF_OPER_DORMANT; 747 break; 748 } 749 750 if (dev->operstate != operstate) { 751 write_lock_bh(&dev_base_lock); 752 dev->operstate = operstate; 753 write_unlock_bh(&dev_base_lock); 754 netdev_state_change(dev); 755 } 756 } 757 758 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 759 { 760 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 761 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 762 } 763 764 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 765 const struct ifinfomsg *ifm) 766 { 767 unsigned int flags = ifm->ifi_flags; 768 769 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 770 if (ifm->ifi_change) 771 flags = (flags & ifm->ifi_change) | 772 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 773 774 return flags; 775 } 776 777 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 778 const struct rtnl_link_stats64 *b) 779 { 780 a->rx_packets = b->rx_packets; 781 a->tx_packets = b->tx_packets; 782 a->rx_bytes = b->rx_bytes; 783 a->tx_bytes = b->tx_bytes; 784 a->rx_errors = b->rx_errors; 785 a->tx_errors = b->tx_errors; 786 a->rx_dropped = b->rx_dropped; 787 a->tx_dropped = b->tx_dropped; 788 789 a->multicast = b->multicast; 790 a->collisions = b->collisions; 791 792 a->rx_length_errors = b->rx_length_errors; 793 a->rx_over_errors = b->rx_over_errors; 794 a->rx_crc_errors = b->rx_crc_errors; 795 a->rx_frame_errors = b->rx_frame_errors; 796 a->rx_fifo_errors = b->rx_fifo_errors; 797 a->rx_missed_errors = b->rx_missed_errors; 798 799 a->tx_aborted_errors = b->tx_aborted_errors; 800 a->tx_carrier_errors = b->tx_carrier_errors; 801 a->tx_fifo_errors = b->tx_fifo_errors; 802 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 803 a->tx_window_errors = b->tx_window_errors; 804 805 a->rx_compressed = b->rx_compressed; 806 a->tx_compressed = b->tx_compressed; 807 808 a->rx_nohandler = b->rx_nohandler; 809 } 810 811 static void copy_rtnl_link_stats64(void *v, const struct rtnl_link_stats64 *b) 812 { 813 memcpy(v, b, sizeof(*b)); 814 } 815 816 /* All VF info */ 817 static inline int rtnl_vfinfo_size(const struct net_device *dev, 818 u32 ext_filter_mask) 819 { 820 if (dev->dev.parent && dev_is_pci(dev->dev.parent) && 821 (ext_filter_mask & RTEXT_FILTER_VF)) { 822 int num_vfs = dev_num_vf(dev->dev.parent); 823 size_t size = nla_total_size(sizeof(struct nlattr)); 824 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 825 size += num_vfs * 826 (nla_total_size(sizeof(struct ifla_vf_mac)) + 827 nla_total_size(sizeof(struct ifla_vf_vlan)) + 828 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 829 nla_total_size(sizeof(struct ifla_vf_rate)) + 830 nla_total_size(sizeof(struct ifla_vf_link_state)) + 831 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 832 /* IFLA_VF_STATS_RX_PACKETS */ 833 nla_total_size(sizeof(__u64)) + 834 /* IFLA_VF_STATS_TX_PACKETS */ 835 nla_total_size(sizeof(__u64)) + 836 /* IFLA_VF_STATS_RX_BYTES */ 837 nla_total_size(sizeof(__u64)) + 838 /* IFLA_VF_STATS_TX_BYTES */ 839 nla_total_size(sizeof(__u64)) + 840 /* IFLA_VF_STATS_BROADCAST */ 841 nla_total_size(sizeof(__u64)) + 842 /* IFLA_VF_STATS_MULTICAST */ 843 nla_total_size(sizeof(__u64)) + 844 nla_total_size(sizeof(struct ifla_vf_trust))); 845 return size; 846 } else 847 return 0; 848 } 849 850 static size_t rtnl_port_size(const struct net_device *dev, 851 u32 ext_filter_mask) 852 { 853 size_t port_size = nla_total_size(4) /* PORT_VF */ 854 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 855 + nla_total_size(sizeof(struct ifla_port_vsi)) 856 /* PORT_VSI_TYPE */ 857 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 858 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 859 + nla_total_size(1) /* PROT_VDP_REQUEST */ 860 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 861 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 862 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 863 + port_size; 864 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 865 + port_size; 866 867 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 868 !(ext_filter_mask & RTEXT_FILTER_VF)) 869 return 0; 870 if (dev_num_vf(dev->dev.parent)) 871 return port_self_size + vf_ports_size + 872 vf_port_size * dev_num_vf(dev->dev.parent); 873 else 874 return port_self_size; 875 } 876 877 static noinline size_t if_nlmsg_size(const struct net_device *dev, 878 u32 ext_filter_mask) 879 { 880 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 881 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 882 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 883 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 884 + nla_total_size(sizeof(struct rtnl_link_ifmap)) 885 + nla_total_size(sizeof(struct rtnl_link_stats)) 886 + nla_total_size(sizeof(struct rtnl_link_stats64)) 887 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 888 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 889 + nla_total_size(4) /* IFLA_TXQLEN */ 890 + nla_total_size(4) /* IFLA_WEIGHT */ 891 + nla_total_size(4) /* IFLA_MTU */ 892 + nla_total_size(4) /* IFLA_LINK */ 893 + nla_total_size(4) /* IFLA_MASTER */ 894 + nla_total_size(1) /* IFLA_CARRIER */ 895 + nla_total_size(4) /* IFLA_PROMISCUITY */ 896 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 897 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 898 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */ 899 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */ 900 + nla_total_size(1) /* IFLA_OPERSTATE */ 901 + nla_total_size(1) /* IFLA_LINKMODE */ 902 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 903 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 904 + nla_total_size(ext_filter_mask 905 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 906 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 907 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 908 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 909 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 910 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 911 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 912 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 913 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 914 915 } 916 917 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 918 { 919 struct nlattr *vf_ports; 920 struct nlattr *vf_port; 921 int vf; 922 int err; 923 924 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 925 if (!vf_ports) 926 return -EMSGSIZE; 927 928 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 929 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 930 if (!vf_port) 931 goto nla_put_failure; 932 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 933 goto nla_put_failure; 934 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 935 if (err == -EMSGSIZE) 936 goto nla_put_failure; 937 if (err) { 938 nla_nest_cancel(skb, vf_port); 939 continue; 940 } 941 nla_nest_end(skb, vf_port); 942 } 943 944 nla_nest_end(skb, vf_ports); 945 946 return 0; 947 948 nla_put_failure: 949 nla_nest_cancel(skb, vf_ports); 950 return -EMSGSIZE; 951 } 952 953 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 954 { 955 struct nlattr *port_self; 956 int err; 957 958 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 959 if (!port_self) 960 return -EMSGSIZE; 961 962 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 963 if (err) { 964 nla_nest_cancel(skb, port_self); 965 return (err == -EMSGSIZE) ? err : 0; 966 } 967 968 nla_nest_end(skb, port_self); 969 970 return 0; 971 } 972 973 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 974 u32 ext_filter_mask) 975 { 976 int err; 977 978 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 979 !(ext_filter_mask & RTEXT_FILTER_VF)) 980 return 0; 981 982 err = rtnl_port_self_fill(skb, dev); 983 if (err) 984 return err; 985 986 if (dev_num_vf(dev->dev.parent)) { 987 err = rtnl_vf_ports_fill(skb, dev); 988 if (err) 989 return err; 990 } 991 992 return 0; 993 } 994 995 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 996 { 997 int err; 998 struct netdev_phys_item_id ppid; 999 1000 err = dev_get_phys_port_id(dev, &ppid); 1001 if (err) { 1002 if (err == -EOPNOTSUPP) 1003 return 0; 1004 return err; 1005 } 1006 1007 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1008 return -EMSGSIZE; 1009 1010 return 0; 1011 } 1012 1013 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1014 { 1015 char name[IFNAMSIZ]; 1016 int err; 1017 1018 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1019 if (err) { 1020 if (err == -EOPNOTSUPP) 1021 return 0; 1022 return err; 1023 } 1024 1025 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 1026 return -EMSGSIZE; 1027 1028 return 0; 1029 } 1030 1031 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1032 { 1033 int err; 1034 struct switchdev_attr attr = { 1035 .orig_dev = dev, 1036 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1037 .flags = SWITCHDEV_F_NO_RECURSE, 1038 }; 1039 1040 err = switchdev_port_attr_get(dev, &attr); 1041 if (err) { 1042 if (err == -EOPNOTSUPP) 1043 return 0; 1044 return err; 1045 } 1046 1047 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1048 attr.u.ppid.id)) 1049 return -EMSGSIZE; 1050 1051 return 0; 1052 } 1053 1054 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1055 struct net_device *dev) 1056 { 1057 const struct rtnl_link_stats64 *stats; 1058 struct rtnl_link_stats64 temp; 1059 struct nlattr *attr; 1060 1061 stats = dev_get_stats(dev, &temp); 1062 1063 attr = nla_reserve(skb, IFLA_STATS, 1064 sizeof(struct rtnl_link_stats)); 1065 if (!attr) 1066 return -EMSGSIZE; 1067 1068 copy_rtnl_link_stats(nla_data(attr), stats); 1069 1070 attr = nla_reserve(skb, IFLA_STATS64, 1071 sizeof(struct rtnl_link_stats64)); 1072 if (!attr) 1073 return -EMSGSIZE; 1074 1075 copy_rtnl_link_stats64(nla_data(attr), stats); 1076 1077 return 0; 1078 } 1079 1080 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1081 struct net_device *dev, 1082 int vfs_num, 1083 struct nlattr *vfinfo) 1084 { 1085 struct ifla_vf_rss_query_en vf_rss_query_en; 1086 struct ifla_vf_link_state vf_linkstate; 1087 struct ifla_vf_spoofchk vf_spoofchk; 1088 struct ifla_vf_tx_rate vf_tx_rate; 1089 struct ifla_vf_stats vf_stats; 1090 struct ifla_vf_trust vf_trust; 1091 struct ifla_vf_vlan vf_vlan; 1092 struct ifla_vf_rate vf_rate; 1093 struct nlattr *vf, *vfstats; 1094 struct ifla_vf_mac vf_mac; 1095 struct ifla_vf_info ivi; 1096 1097 /* Not all SR-IOV capable drivers support the 1098 * spoofcheck and "RSS query enable" query. Preset to 1099 * -1 so the user space tool can detect that the driver 1100 * didn't report anything. 1101 */ 1102 ivi.spoofchk = -1; 1103 ivi.rss_query_en = -1; 1104 ivi.trusted = -1; 1105 memset(ivi.mac, 0, sizeof(ivi.mac)); 1106 /* The default value for VF link state is "auto" 1107 * IFLA_VF_LINK_STATE_AUTO which equals zero 1108 */ 1109 ivi.linkstate = 0; 1110 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1111 return 0; 1112 1113 vf_mac.vf = 1114 vf_vlan.vf = 1115 vf_rate.vf = 1116 vf_tx_rate.vf = 1117 vf_spoofchk.vf = 1118 vf_linkstate.vf = 1119 vf_rss_query_en.vf = 1120 vf_trust.vf = ivi.vf; 1121 1122 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1123 vf_vlan.vlan = ivi.vlan; 1124 vf_vlan.qos = ivi.qos; 1125 vf_tx_rate.rate = ivi.max_tx_rate; 1126 vf_rate.min_tx_rate = ivi.min_tx_rate; 1127 vf_rate.max_tx_rate = ivi.max_tx_rate; 1128 vf_spoofchk.setting = ivi.spoofchk; 1129 vf_linkstate.link_state = ivi.linkstate; 1130 vf_rss_query_en.setting = ivi.rss_query_en; 1131 vf_trust.setting = ivi.trusted; 1132 vf = nla_nest_start(skb, IFLA_VF_INFO); 1133 if (!vf) { 1134 nla_nest_cancel(skb, vfinfo); 1135 return -EMSGSIZE; 1136 } 1137 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1138 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1139 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1140 &vf_rate) || 1141 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1142 &vf_tx_rate) || 1143 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1144 &vf_spoofchk) || 1145 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1146 &vf_linkstate) || 1147 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1148 sizeof(vf_rss_query_en), 1149 &vf_rss_query_en) || 1150 nla_put(skb, IFLA_VF_TRUST, 1151 sizeof(vf_trust), &vf_trust)) 1152 return -EMSGSIZE; 1153 memset(&vf_stats, 0, sizeof(vf_stats)); 1154 if (dev->netdev_ops->ndo_get_vf_stats) 1155 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1156 &vf_stats); 1157 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1158 if (!vfstats) { 1159 nla_nest_cancel(skb, vf); 1160 nla_nest_cancel(skb, vfinfo); 1161 return -EMSGSIZE; 1162 } 1163 if (nla_put_u64(skb, IFLA_VF_STATS_RX_PACKETS, 1164 vf_stats.rx_packets) || 1165 nla_put_u64(skb, IFLA_VF_STATS_TX_PACKETS, 1166 vf_stats.tx_packets) || 1167 nla_put_u64(skb, IFLA_VF_STATS_RX_BYTES, 1168 vf_stats.rx_bytes) || 1169 nla_put_u64(skb, IFLA_VF_STATS_TX_BYTES, 1170 vf_stats.tx_bytes) || 1171 nla_put_u64(skb, IFLA_VF_STATS_BROADCAST, 1172 vf_stats.broadcast) || 1173 nla_put_u64(skb, IFLA_VF_STATS_MULTICAST, 1174 vf_stats.multicast)) 1175 return -EMSGSIZE; 1176 nla_nest_end(skb, vfstats); 1177 nla_nest_end(skb, vf); 1178 return 0; 1179 } 1180 1181 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1182 { 1183 struct rtnl_link_ifmap map; 1184 1185 memset(&map, 0, sizeof(map)); 1186 map.mem_start = dev->mem_start; 1187 map.mem_end = dev->mem_end; 1188 map.base_addr = dev->base_addr; 1189 map.irq = dev->irq; 1190 map.dma = dev->dma; 1191 map.port = dev->if_port; 1192 1193 if (nla_put(skb, IFLA_MAP, sizeof(map), &map)) 1194 return -EMSGSIZE; 1195 1196 return 0; 1197 } 1198 1199 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1200 int type, u32 pid, u32 seq, u32 change, 1201 unsigned int flags, u32 ext_filter_mask) 1202 { 1203 struct ifinfomsg *ifm; 1204 struct nlmsghdr *nlh; 1205 struct nlattr *af_spec; 1206 struct rtnl_af_ops *af_ops; 1207 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1208 1209 ASSERT_RTNL(); 1210 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1211 if (nlh == NULL) 1212 return -EMSGSIZE; 1213 1214 ifm = nlmsg_data(nlh); 1215 ifm->ifi_family = AF_UNSPEC; 1216 ifm->__ifi_pad = 0; 1217 ifm->ifi_type = dev->type; 1218 ifm->ifi_index = dev->ifindex; 1219 ifm->ifi_flags = dev_get_flags(dev); 1220 ifm->ifi_change = change; 1221 1222 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1223 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1224 nla_put_u8(skb, IFLA_OPERSTATE, 1225 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1226 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1227 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1228 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1229 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1230 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1231 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1232 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1233 #ifdef CONFIG_RPS 1234 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1235 #endif 1236 (dev->ifindex != dev_get_iflink(dev) && 1237 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1238 (upper_dev && 1239 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1240 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1241 (dev->qdisc && 1242 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1243 (dev->ifalias && 1244 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1245 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1246 atomic_read(&dev->carrier_changes)) || 1247 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1248 goto nla_put_failure; 1249 1250 if (rtnl_fill_link_ifmap(skb, dev)) 1251 goto nla_put_failure; 1252 1253 if (dev->addr_len) { 1254 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1255 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1256 goto nla_put_failure; 1257 } 1258 1259 if (rtnl_phys_port_id_fill(skb, dev)) 1260 goto nla_put_failure; 1261 1262 if (rtnl_phys_port_name_fill(skb, dev)) 1263 goto nla_put_failure; 1264 1265 if (rtnl_phys_switch_id_fill(skb, dev)) 1266 goto nla_put_failure; 1267 1268 if (rtnl_fill_stats(skb, dev)) 1269 goto nla_put_failure; 1270 1271 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1272 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1273 goto nla_put_failure; 1274 1275 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1276 ext_filter_mask & RTEXT_FILTER_VF) { 1277 int i; 1278 struct nlattr *vfinfo; 1279 int num_vfs = dev_num_vf(dev->dev.parent); 1280 1281 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1282 if (!vfinfo) 1283 goto nla_put_failure; 1284 for (i = 0; i < num_vfs; i++) { 1285 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1286 goto nla_put_failure; 1287 } 1288 1289 nla_nest_end(skb, vfinfo); 1290 } 1291 1292 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1293 goto nla_put_failure; 1294 1295 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1296 if (rtnl_link_fill(skb, dev) < 0) 1297 goto nla_put_failure; 1298 } 1299 1300 if (dev->rtnl_link_ops && 1301 dev->rtnl_link_ops->get_link_net) { 1302 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1303 1304 if (!net_eq(dev_net(dev), link_net)) { 1305 int id = peernet2id_alloc(dev_net(dev), link_net); 1306 1307 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1308 goto nla_put_failure; 1309 } 1310 } 1311 1312 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1313 goto nla_put_failure; 1314 1315 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1316 if (af_ops->fill_link_af) { 1317 struct nlattr *af; 1318 int err; 1319 1320 if (!(af = nla_nest_start(skb, af_ops->family))) 1321 goto nla_put_failure; 1322 1323 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1324 1325 /* 1326 * Caller may return ENODATA to indicate that there 1327 * was no data to be dumped. This is not an error, it 1328 * means we should trim the attribute header and 1329 * continue. 1330 */ 1331 if (err == -ENODATA) 1332 nla_nest_cancel(skb, af); 1333 else if (err < 0) 1334 goto nla_put_failure; 1335 1336 nla_nest_end(skb, af); 1337 } 1338 } 1339 1340 nla_nest_end(skb, af_spec); 1341 1342 nlmsg_end(skb, nlh); 1343 return 0; 1344 1345 nla_put_failure: 1346 nlmsg_cancel(skb, nlh); 1347 return -EMSGSIZE; 1348 } 1349 1350 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1351 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1352 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1353 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1354 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1355 [IFLA_MTU] = { .type = NLA_U32 }, 1356 [IFLA_LINK] = { .type = NLA_U32 }, 1357 [IFLA_MASTER] = { .type = NLA_U32 }, 1358 [IFLA_CARRIER] = { .type = NLA_U8 }, 1359 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1360 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1361 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1362 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1363 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1364 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1365 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1366 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1367 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1368 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1369 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1370 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1371 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1372 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1373 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1374 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1375 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1376 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1377 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1378 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1379 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1380 }; 1381 1382 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1383 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1384 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1385 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1386 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1387 }; 1388 1389 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1390 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1391 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1392 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1393 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1394 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1395 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1396 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1397 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1398 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1399 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1400 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1401 }; 1402 1403 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1404 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1405 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1406 .len = PORT_PROFILE_MAX }, 1407 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1408 .len = sizeof(struct ifla_port_vsi)}, 1409 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1410 .len = PORT_UUID_MAX }, 1411 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1412 .len = PORT_UUID_MAX }, 1413 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1414 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1415 }; 1416 1417 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1418 { 1419 const struct rtnl_link_ops *ops = NULL; 1420 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1421 1422 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0) 1423 return NULL; 1424 1425 if (linfo[IFLA_INFO_KIND]) { 1426 char kind[MODULE_NAME_LEN]; 1427 1428 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1429 ops = rtnl_link_ops_get(kind); 1430 } 1431 1432 return ops; 1433 } 1434 1435 static bool link_master_filtered(struct net_device *dev, int master_idx) 1436 { 1437 struct net_device *master; 1438 1439 if (!master_idx) 1440 return false; 1441 1442 master = netdev_master_upper_dev_get(dev); 1443 if (!master || master->ifindex != master_idx) 1444 return true; 1445 1446 return false; 1447 } 1448 1449 static bool link_kind_filtered(const struct net_device *dev, 1450 const struct rtnl_link_ops *kind_ops) 1451 { 1452 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1453 return true; 1454 1455 return false; 1456 } 1457 1458 static bool link_dump_filtered(struct net_device *dev, 1459 int master_idx, 1460 const struct rtnl_link_ops *kind_ops) 1461 { 1462 if (link_master_filtered(dev, master_idx) || 1463 link_kind_filtered(dev, kind_ops)) 1464 return true; 1465 1466 return false; 1467 } 1468 1469 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1470 { 1471 struct net *net = sock_net(skb->sk); 1472 int h, s_h; 1473 int idx = 0, s_idx; 1474 struct net_device *dev; 1475 struct hlist_head *head; 1476 struct nlattr *tb[IFLA_MAX+1]; 1477 u32 ext_filter_mask = 0; 1478 const struct rtnl_link_ops *kind_ops = NULL; 1479 unsigned int flags = NLM_F_MULTI; 1480 int master_idx = 0; 1481 int err; 1482 int hdrlen; 1483 1484 s_h = cb->args[0]; 1485 s_idx = cb->args[1]; 1486 1487 cb->seq = net->dev_base_seq; 1488 1489 /* A hack to preserve kernel<->userspace interface. 1490 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1491 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1492 * what iproute2 < v3.9.0 used. 1493 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1494 * attribute, its netlink message is shorter than struct ifinfomsg. 1495 */ 1496 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1497 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1498 1499 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1500 1501 if (tb[IFLA_EXT_MASK]) 1502 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1503 1504 if (tb[IFLA_MASTER]) 1505 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1506 1507 if (tb[IFLA_LINKINFO]) 1508 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1509 1510 if (master_idx || kind_ops) 1511 flags |= NLM_F_DUMP_FILTERED; 1512 } 1513 1514 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1515 idx = 0; 1516 head = &net->dev_index_head[h]; 1517 hlist_for_each_entry(dev, head, index_hlist) { 1518 if (link_dump_filtered(dev, master_idx, kind_ops)) 1519 continue; 1520 if (idx < s_idx) 1521 goto cont; 1522 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1523 NETLINK_CB(cb->skb).portid, 1524 cb->nlh->nlmsg_seq, 0, 1525 flags, 1526 ext_filter_mask); 1527 /* If we ran out of room on the first message, 1528 * we're in trouble 1529 */ 1530 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1531 1532 if (err < 0) 1533 goto out; 1534 1535 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1536 cont: 1537 idx++; 1538 } 1539 } 1540 out: 1541 cb->args[1] = idx; 1542 cb->args[0] = h; 1543 1544 return skb->len; 1545 } 1546 1547 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1548 { 1549 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1550 } 1551 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1552 1553 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1554 { 1555 struct net *net; 1556 /* Examine the link attributes and figure out which 1557 * network namespace we are talking about. 1558 */ 1559 if (tb[IFLA_NET_NS_PID]) 1560 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1561 else if (tb[IFLA_NET_NS_FD]) 1562 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1563 else 1564 net = get_net(src_net); 1565 return net; 1566 } 1567 EXPORT_SYMBOL(rtnl_link_get_net); 1568 1569 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1570 { 1571 if (dev) { 1572 if (tb[IFLA_ADDRESS] && 1573 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1574 return -EINVAL; 1575 1576 if (tb[IFLA_BROADCAST] && 1577 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1578 return -EINVAL; 1579 } 1580 1581 if (tb[IFLA_AF_SPEC]) { 1582 struct nlattr *af; 1583 int rem, err; 1584 1585 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1586 const struct rtnl_af_ops *af_ops; 1587 1588 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1589 return -EAFNOSUPPORT; 1590 1591 if (!af_ops->set_link_af) 1592 return -EOPNOTSUPP; 1593 1594 if (af_ops->validate_link_af) { 1595 err = af_ops->validate_link_af(dev, af); 1596 if (err < 0) 1597 return err; 1598 } 1599 } 1600 } 1601 1602 return 0; 1603 } 1604 1605 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1606 int guid_type) 1607 { 1608 const struct net_device_ops *ops = dev->netdev_ops; 1609 1610 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1611 } 1612 1613 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1614 { 1615 if (dev->type != ARPHRD_INFINIBAND) 1616 return -EOPNOTSUPP; 1617 1618 return handle_infiniband_guid(dev, ivt, guid_type); 1619 } 1620 1621 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1622 { 1623 const struct net_device_ops *ops = dev->netdev_ops; 1624 int err = -EINVAL; 1625 1626 if (tb[IFLA_VF_MAC]) { 1627 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1628 1629 err = -EOPNOTSUPP; 1630 if (ops->ndo_set_vf_mac) 1631 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1632 ivm->mac); 1633 if (err < 0) 1634 return err; 1635 } 1636 1637 if (tb[IFLA_VF_VLAN]) { 1638 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1639 1640 err = -EOPNOTSUPP; 1641 if (ops->ndo_set_vf_vlan) 1642 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1643 ivv->qos); 1644 if (err < 0) 1645 return err; 1646 } 1647 1648 if (tb[IFLA_VF_TX_RATE]) { 1649 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1650 struct ifla_vf_info ivf; 1651 1652 err = -EOPNOTSUPP; 1653 if (ops->ndo_get_vf_config) 1654 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1655 if (err < 0) 1656 return err; 1657 1658 err = -EOPNOTSUPP; 1659 if (ops->ndo_set_vf_rate) 1660 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1661 ivf.min_tx_rate, 1662 ivt->rate); 1663 if (err < 0) 1664 return err; 1665 } 1666 1667 if (tb[IFLA_VF_RATE]) { 1668 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1669 1670 err = -EOPNOTSUPP; 1671 if (ops->ndo_set_vf_rate) 1672 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1673 ivt->min_tx_rate, 1674 ivt->max_tx_rate); 1675 if (err < 0) 1676 return err; 1677 } 1678 1679 if (tb[IFLA_VF_SPOOFCHK]) { 1680 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1681 1682 err = -EOPNOTSUPP; 1683 if (ops->ndo_set_vf_spoofchk) 1684 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1685 ivs->setting); 1686 if (err < 0) 1687 return err; 1688 } 1689 1690 if (tb[IFLA_VF_LINK_STATE]) { 1691 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1692 1693 err = -EOPNOTSUPP; 1694 if (ops->ndo_set_vf_link_state) 1695 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1696 ivl->link_state); 1697 if (err < 0) 1698 return err; 1699 } 1700 1701 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1702 struct ifla_vf_rss_query_en *ivrssq_en; 1703 1704 err = -EOPNOTSUPP; 1705 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1706 if (ops->ndo_set_vf_rss_query_en) 1707 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1708 ivrssq_en->setting); 1709 if (err < 0) 1710 return err; 1711 } 1712 1713 if (tb[IFLA_VF_TRUST]) { 1714 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1715 1716 err = -EOPNOTSUPP; 1717 if (ops->ndo_set_vf_trust) 1718 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1719 if (err < 0) 1720 return err; 1721 } 1722 1723 if (tb[IFLA_VF_IB_NODE_GUID]) { 1724 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1725 1726 if (!ops->ndo_set_vf_guid) 1727 return -EOPNOTSUPP; 1728 1729 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1730 } 1731 1732 if (tb[IFLA_VF_IB_PORT_GUID]) { 1733 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1734 1735 if (!ops->ndo_set_vf_guid) 1736 return -EOPNOTSUPP; 1737 1738 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1739 } 1740 1741 return err; 1742 } 1743 1744 static int do_set_master(struct net_device *dev, int ifindex) 1745 { 1746 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1747 const struct net_device_ops *ops; 1748 int err; 1749 1750 if (upper_dev) { 1751 if (upper_dev->ifindex == ifindex) 1752 return 0; 1753 ops = upper_dev->netdev_ops; 1754 if (ops->ndo_del_slave) { 1755 err = ops->ndo_del_slave(upper_dev, dev); 1756 if (err) 1757 return err; 1758 } else { 1759 return -EOPNOTSUPP; 1760 } 1761 } 1762 1763 if (ifindex) { 1764 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1765 if (!upper_dev) 1766 return -EINVAL; 1767 ops = upper_dev->netdev_ops; 1768 if (ops->ndo_add_slave) { 1769 err = ops->ndo_add_slave(upper_dev, dev); 1770 if (err) 1771 return err; 1772 } else { 1773 return -EOPNOTSUPP; 1774 } 1775 } 1776 return 0; 1777 } 1778 1779 #define DO_SETLINK_MODIFIED 0x01 1780 /* notify flag means notify + modified. */ 1781 #define DO_SETLINK_NOTIFY 0x03 1782 static int do_setlink(const struct sk_buff *skb, 1783 struct net_device *dev, struct ifinfomsg *ifm, 1784 struct nlattr **tb, char *ifname, int status) 1785 { 1786 const struct net_device_ops *ops = dev->netdev_ops; 1787 int err; 1788 1789 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1790 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1791 if (IS_ERR(net)) { 1792 err = PTR_ERR(net); 1793 goto errout; 1794 } 1795 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1796 put_net(net); 1797 err = -EPERM; 1798 goto errout; 1799 } 1800 err = dev_change_net_namespace(dev, net, ifname); 1801 put_net(net); 1802 if (err) 1803 goto errout; 1804 status |= DO_SETLINK_MODIFIED; 1805 } 1806 1807 if (tb[IFLA_MAP]) { 1808 struct rtnl_link_ifmap *u_map; 1809 struct ifmap k_map; 1810 1811 if (!ops->ndo_set_config) { 1812 err = -EOPNOTSUPP; 1813 goto errout; 1814 } 1815 1816 if (!netif_device_present(dev)) { 1817 err = -ENODEV; 1818 goto errout; 1819 } 1820 1821 u_map = nla_data(tb[IFLA_MAP]); 1822 k_map.mem_start = (unsigned long) u_map->mem_start; 1823 k_map.mem_end = (unsigned long) u_map->mem_end; 1824 k_map.base_addr = (unsigned short) u_map->base_addr; 1825 k_map.irq = (unsigned char) u_map->irq; 1826 k_map.dma = (unsigned char) u_map->dma; 1827 k_map.port = (unsigned char) u_map->port; 1828 1829 err = ops->ndo_set_config(dev, &k_map); 1830 if (err < 0) 1831 goto errout; 1832 1833 status |= DO_SETLINK_NOTIFY; 1834 } 1835 1836 if (tb[IFLA_ADDRESS]) { 1837 struct sockaddr *sa; 1838 int len; 1839 1840 len = sizeof(sa_family_t) + dev->addr_len; 1841 sa = kmalloc(len, GFP_KERNEL); 1842 if (!sa) { 1843 err = -ENOMEM; 1844 goto errout; 1845 } 1846 sa->sa_family = dev->type; 1847 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1848 dev->addr_len); 1849 err = dev_set_mac_address(dev, sa); 1850 kfree(sa); 1851 if (err) 1852 goto errout; 1853 status |= DO_SETLINK_MODIFIED; 1854 } 1855 1856 if (tb[IFLA_MTU]) { 1857 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1858 if (err < 0) 1859 goto errout; 1860 status |= DO_SETLINK_MODIFIED; 1861 } 1862 1863 if (tb[IFLA_GROUP]) { 1864 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1865 status |= DO_SETLINK_NOTIFY; 1866 } 1867 1868 /* 1869 * Interface selected by interface index but interface 1870 * name provided implies that a name change has been 1871 * requested. 1872 */ 1873 if (ifm->ifi_index > 0 && ifname[0]) { 1874 err = dev_change_name(dev, ifname); 1875 if (err < 0) 1876 goto errout; 1877 status |= DO_SETLINK_MODIFIED; 1878 } 1879 1880 if (tb[IFLA_IFALIAS]) { 1881 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 1882 nla_len(tb[IFLA_IFALIAS])); 1883 if (err < 0) 1884 goto errout; 1885 status |= DO_SETLINK_NOTIFY; 1886 } 1887 1888 if (tb[IFLA_BROADCAST]) { 1889 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 1890 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 1891 } 1892 1893 if (ifm->ifi_flags || ifm->ifi_change) { 1894 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 1895 if (err < 0) 1896 goto errout; 1897 } 1898 1899 if (tb[IFLA_MASTER]) { 1900 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 1901 if (err) 1902 goto errout; 1903 status |= DO_SETLINK_MODIFIED; 1904 } 1905 1906 if (tb[IFLA_CARRIER]) { 1907 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 1908 if (err) 1909 goto errout; 1910 status |= DO_SETLINK_MODIFIED; 1911 } 1912 1913 if (tb[IFLA_TXQLEN]) { 1914 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 1915 1916 if (dev->tx_queue_len ^ value) 1917 status |= DO_SETLINK_NOTIFY; 1918 1919 dev->tx_queue_len = value; 1920 } 1921 1922 if (tb[IFLA_OPERSTATE]) 1923 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 1924 1925 if (tb[IFLA_LINKMODE]) { 1926 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 1927 1928 write_lock_bh(&dev_base_lock); 1929 if (dev->link_mode ^ value) 1930 status |= DO_SETLINK_NOTIFY; 1931 dev->link_mode = value; 1932 write_unlock_bh(&dev_base_lock); 1933 } 1934 1935 if (tb[IFLA_VFINFO_LIST]) { 1936 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 1937 struct nlattr *attr; 1938 int rem; 1939 1940 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 1941 if (nla_type(attr) != IFLA_VF_INFO || 1942 nla_len(attr) < NLA_HDRLEN) { 1943 err = -EINVAL; 1944 goto errout; 1945 } 1946 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 1947 ifla_vf_policy); 1948 if (err < 0) 1949 goto errout; 1950 err = do_setvfinfo(dev, vfinfo); 1951 if (err < 0) 1952 goto errout; 1953 status |= DO_SETLINK_NOTIFY; 1954 } 1955 } 1956 err = 0; 1957 1958 if (tb[IFLA_VF_PORTS]) { 1959 struct nlattr *port[IFLA_PORT_MAX+1]; 1960 struct nlattr *attr; 1961 int vf; 1962 int rem; 1963 1964 err = -EOPNOTSUPP; 1965 if (!ops->ndo_set_vf_port) 1966 goto errout; 1967 1968 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 1969 if (nla_type(attr) != IFLA_VF_PORT || 1970 nla_len(attr) < NLA_HDRLEN) { 1971 err = -EINVAL; 1972 goto errout; 1973 } 1974 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 1975 ifla_port_policy); 1976 if (err < 0) 1977 goto errout; 1978 if (!port[IFLA_PORT_VF]) { 1979 err = -EOPNOTSUPP; 1980 goto errout; 1981 } 1982 vf = nla_get_u32(port[IFLA_PORT_VF]); 1983 err = ops->ndo_set_vf_port(dev, vf, port); 1984 if (err < 0) 1985 goto errout; 1986 status |= DO_SETLINK_NOTIFY; 1987 } 1988 } 1989 err = 0; 1990 1991 if (tb[IFLA_PORT_SELF]) { 1992 struct nlattr *port[IFLA_PORT_MAX+1]; 1993 1994 err = nla_parse_nested(port, IFLA_PORT_MAX, 1995 tb[IFLA_PORT_SELF], ifla_port_policy); 1996 if (err < 0) 1997 goto errout; 1998 1999 err = -EOPNOTSUPP; 2000 if (ops->ndo_set_vf_port) 2001 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2002 if (err < 0) 2003 goto errout; 2004 status |= DO_SETLINK_NOTIFY; 2005 } 2006 2007 if (tb[IFLA_AF_SPEC]) { 2008 struct nlattr *af; 2009 int rem; 2010 2011 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2012 const struct rtnl_af_ops *af_ops; 2013 2014 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2015 BUG(); 2016 2017 err = af_ops->set_link_af(dev, af); 2018 if (err < 0) 2019 goto errout; 2020 2021 status |= DO_SETLINK_NOTIFY; 2022 } 2023 } 2024 err = 0; 2025 2026 if (tb[IFLA_PROTO_DOWN]) { 2027 err = dev_change_proto_down(dev, 2028 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2029 if (err) 2030 goto errout; 2031 status |= DO_SETLINK_NOTIFY; 2032 } 2033 2034 errout: 2035 if (status & DO_SETLINK_MODIFIED) { 2036 if (status & DO_SETLINK_NOTIFY) 2037 netdev_state_change(dev); 2038 2039 if (err < 0) 2040 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", 2041 dev->name); 2042 } 2043 2044 return err; 2045 } 2046 2047 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2048 { 2049 struct net *net = sock_net(skb->sk); 2050 struct ifinfomsg *ifm; 2051 struct net_device *dev; 2052 int err; 2053 struct nlattr *tb[IFLA_MAX+1]; 2054 char ifname[IFNAMSIZ]; 2055 2056 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2057 if (err < 0) 2058 goto errout; 2059 2060 if (tb[IFLA_IFNAME]) 2061 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2062 else 2063 ifname[0] = '\0'; 2064 2065 err = -EINVAL; 2066 ifm = nlmsg_data(nlh); 2067 if (ifm->ifi_index > 0) 2068 dev = __dev_get_by_index(net, ifm->ifi_index); 2069 else if (tb[IFLA_IFNAME]) 2070 dev = __dev_get_by_name(net, ifname); 2071 else 2072 goto errout; 2073 2074 if (dev == NULL) { 2075 err = -ENODEV; 2076 goto errout; 2077 } 2078 2079 err = validate_linkmsg(dev, tb); 2080 if (err < 0) 2081 goto errout; 2082 2083 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 2084 errout: 2085 return err; 2086 } 2087 2088 static int rtnl_group_dellink(const struct net *net, int group) 2089 { 2090 struct net_device *dev, *aux; 2091 LIST_HEAD(list_kill); 2092 bool found = false; 2093 2094 if (!group) 2095 return -EPERM; 2096 2097 for_each_netdev(net, dev) { 2098 if (dev->group == group) { 2099 const struct rtnl_link_ops *ops; 2100 2101 found = true; 2102 ops = dev->rtnl_link_ops; 2103 if (!ops || !ops->dellink) 2104 return -EOPNOTSUPP; 2105 } 2106 } 2107 2108 if (!found) 2109 return -ENODEV; 2110 2111 for_each_netdev_safe(net, dev, aux) { 2112 if (dev->group == group) { 2113 const struct rtnl_link_ops *ops; 2114 2115 ops = dev->rtnl_link_ops; 2116 ops->dellink(dev, &list_kill); 2117 } 2118 } 2119 unregister_netdevice_many(&list_kill); 2120 2121 return 0; 2122 } 2123 2124 int rtnl_delete_link(struct net_device *dev) 2125 { 2126 const struct rtnl_link_ops *ops; 2127 LIST_HEAD(list_kill); 2128 2129 ops = dev->rtnl_link_ops; 2130 if (!ops || !ops->dellink) 2131 return -EOPNOTSUPP; 2132 2133 ops->dellink(dev, &list_kill); 2134 unregister_netdevice_many(&list_kill); 2135 2136 return 0; 2137 } 2138 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2139 2140 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2141 { 2142 struct net *net = sock_net(skb->sk); 2143 struct net_device *dev; 2144 struct ifinfomsg *ifm; 2145 char ifname[IFNAMSIZ]; 2146 struct nlattr *tb[IFLA_MAX+1]; 2147 int err; 2148 2149 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2150 if (err < 0) 2151 return err; 2152 2153 if (tb[IFLA_IFNAME]) 2154 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2155 2156 ifm = nlmsg_data(nlh); 2157 if (ifm->ifi_index > 0) 2158 dev = __dev_get_by_index(net, ifm->ifi_index); 2159 else if (tb[IFLA_IFNAME]) 2160 dev = __dev_get_by_name(net, ifname); 2161 else if (tb[IFLA_GROUP]) 2162 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2163 else 2164 return -EINVAL; 2165 2166 if (!dev) 2167 return -ENODEV; 2168 2169 return rtnl_delete_link(dev); 2170 } 2171 2172 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2173 { 2174 unsigned int old_flags; 2175 int err; 2176 2177 old_flags = dev->flags; 2178 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2179 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2180 if (err < 0) 2181 return err; 2182 } 2183 2184 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2185 2186 __dev_notify_flags(dev, old_flags, ~0U); 2187 return 0; 2188 } 2189 EXPORT_SYMBOL(rtnl_configure_link); 2190 2191 struct net_device *rtnl_create_link(struct net *net, 2192 const char *ifname, unsigned char name_assign_type, 2193 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2194 { 2195 int err; 2196 struct net_device *dev; 2197 unsigned int num_tx_queues = 1; 2198 unsigned int num_rx_queues = 1; 2199 2200 if (tb[IFLA_NUM_TX_QUEUES]) 2201 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2202 else if (ops->get_num_tx_queues) 2203 num_tx_queues = ops->get_num_tx_queues(); 2204 2205 if (tb[IFLA_NUM_RX_QUEUES]) 2206 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2207 else if (ops->get_num_rx_queues) 2208 num_rx_queues = ops->get_num_rx_queues(); 2209 2210 err = -ENOMEM; 2211 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2212 ops->setup, num_tx_queues, num_rx_queues); 2213 if (!dev) 2214 goto err; 2215 2216 dev_net_set(dev, net); 2217 dev->rtnl_link_ops = ops; 2218 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2219 2220 if (tb[IFLA_MTU]) 2221 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2222 if (tb[IFLA_ADDRESS]) { 2223 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2224 nla_len(tb[IFLA_ADDRESS])); 2225 dev->addr_assign_type = NET_ADDR_SET; 2226 } 2227 if (tb[IFLA_BROADCAST]) 2228 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2229 nla_len(tb[IFLA_BROADCAST])); 2230 if (tb[IFLA_TXQLEN]) 2231 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2232 if (tb[IFLA_OPERSTATE]) 2233 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2234 if (tb[IFLA_LINKMODE]) 2235 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2236 if (tb[IFLA_GROUP]) 2237 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2238 2239 return dev; 2240 2241 err: 2242 return ERR_PTR(err); 2243 } 2244 EXPORT_SYMBOL(rtnl_create_link); 2245 2246 static int rtnl_group_changelink(const struct sk_buff *skb, 2247 struct net *net, int group, 2248 struct ifinfomsg *ifm, 2249 struct nlattr **tb) 2250 { 2251 struct net_device *dev, *aux; 2252 int err; 2253 2254 for_each_netdev_safe(net, dev, aux) { 2255 if (dev->group == group) { 2256 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2257 if (err < 0) 2258 return err; 2259 } 2260 } 2261 2262 return 0; 2263 } 2264 2265 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2266 { 2267 struct net *net = sock_net(skb->sk); 2268 const struct rtnl_link_ops *ops; 2269 const struct rtnl_link_ops *m_ops = NULL; 2270 struct net_device *dev; 2271 struct net_device *master_dev = NULL; 2272 struct ifinfomsg *ifm; 2273 char kind[MODULE_NAME_LEN]; 2274 char ifname[IFNAMSIZ]; 2275 struct nlattr *tb[IFLA_MAX+1]; 2276 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2277 unsigned char name_assign_type = NET_NAME_USER; 2278 int err; 2279 2280 #ifdef CONFIG_MODULES 2281 replay: 2282 #endif 2283 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2284 if (err < 0) 2285 return err; 2286 2287 if (tb[IFLA_IFNAME]) 2288 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2289 else 2290 ifname[0] = '\0'; 2291 2292 ifm = nlmsg_data(nlh); 2293 if (ifm->ifi_index > 0) 2294 dev = __dev_get_by_index(net, ifm->ifi_index); 2295 else { 2296 if (ifname[0]) 2297 dev = __dev_get_by_name(net, ifname); 2298 else 2299 dev = NULL; 2300 } 2301 2302 if (dev) { 2303 master_dev = netdev_master_upper_dev_get(dev); 2304 if (master_dev) 2305 m_ops = master_dev->rtnl_link_ops; 2306 } 2307 2308 err = validate_linkmsg(dev, tb); 2309 if (err < 0) 2310 return err; 2311 2312 if (tb[IFLA_LINKINFO]) { 2313 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2314 tb[IFLA_LINKINFO], ifla_info_policy); 2315 if (err < 0) 2316 return err; 2317 } else 2318 memset(linkinfo, 0, sizeof(linkinfo)); 2319 2320 if (linkinfo[IFLA_INFO_KIND]) { 2321 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2322 ops = rtnl_link_ops_get(kind); 2323 } else { 2324 kind[0] = '\0'; 2325 ops = NULL; 2326 } 2327 2328 if (1) { 2329 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2330 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2331 struct nlattr **data = NULL; 2332 struct nlattr **slave_data = NULL; 2333 struct net *dest_net, *link_net = NULL; 2334 2335 if (ops) { 2336 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2337 err = nla_parse_nested(attr, ops->maxtype, 2338 linkinfo[IFLA_INFO_DATA], 2339 ops->policy); 2340 if (err < 0) 2341 return err; 2342 data = attr; 2343 } 2344 if (ops->validate) { 2345 err = ops->validate(tb, data); 2346 if (err < 0) 2347 return err; 2348 } 2349 } 2350 2351 if (m_ops) { 2352 if (m_ops->slave_maxtype && 2353 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2354 err = nla_parse_nested(slave_attr, 2355 m_ops->slave_maxtype, 2356 linkinfo[IFLA_INFO_SLAVE_DATA], 2357 m_ops->slave_policy); 2358 if (err < 0) 2359 return err; 2360 slave_data = slave_attr; 2361 } 2362 if (m_ops->slave_validate) { 2363 err = m_ops->slave_validate(tb, slave_data); 2364 if (err < 0) 2365 return err; 2366 } 2367 } 2368 2369 if (dev) { 2370 int status = 0; 2371 2372 if (nlh->nlmsg_flags & NLM_F_EXCL) 2373 return -EEXIST; 2374 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2375 return -EOPNOTSUPP; 2376 2377 if (linkinfo[IFLA_INFO_DATA]) { 2378 if (!ops || ops != dev->rtnl_link_ops || 2379 !ops->changelink) 2380 return -EOPNOTSUPP; 2381 2382 err = ops->changelink(dev, tb, data); 2383 if (err < 0) 2384 return err; 2385 status |= DO_SETLINK_NOTIFY; 2386 } 2387 2388 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2389 if (!m_ops || !m_ops->slave_changelink) 2390 return -EOPNOTSUPP; 2391 2392 err = m_ops->slave_changelink(master_dev, dev, 2393 tb, slave_data); 2394 if (err < 0) 2395 return err; 2396 status |= DO_SETLINK_NOTIFY; 2397 } 2398 2399 return do_setlink(skb, dev, ifm, tb, ifname, status); 2400 } 2401 2402 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2403 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2404 return rtnl_group_changelink(skb, net, 2405 nla_get_u32(tb[IFLA_GROUP]), 2406 ifm, tb); 2407 return -ENODEV; 2408 } 2409 2410 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2411 return -EOPNOTSUPP; 2412 2413 if (!ops) { 2414 #ifdef CONFIG_MODULES 2415 if (kind[0]) { 2416 __rtnl_unlock(); 2417 request_module("rtnl-link-%s", kind); 2418 rtnl_lock(); 2419 ops = rtnl_link_ops_get(kind); 2420 if (ops) 2421 goto replay; 2422 } 2423 #endif 2424 return -EOPNOTSUPP; 2425 } 2426 2427 if (!ops->setup) 2428 return -EOPNOTSUPP; 2429 2430 if (!ifname[0]) { 2431 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2432 name_assign_type = NET_NAME_ENUM; 2433 } 2434 2435 dest_net = rtnl_link_get_net(net, tb); 2436 if (IS_ERR(dest_net)) 2437 return PTR_ERR(dest_net); 2438 2439 err = -EPERM; 2440 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2441 goto out; 2442 2443 if (tb[IFLA_LINK_NETNSID]) { 2444 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2445 2446 link_net = get_net_ns_by_id(dest_net, id); 2447 if (!link_net) { 2448 err = -EINVAL; 2449 goto out; 2450 } 2451 err = -EPERM; 2452 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2453 goto out; 2454 } 2455 2456 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2457 name_assign_type, ops, tb); 2458 if (IS_ERR(dev)) { 2459 err = PTR_ERR(dev); 2460 goto out; 2461 } 2462 2463 dev->ifindex = ifm->ifi_index; 2464 2465 if (ops->newlink) { 2466 err = ops->newlink(link_net ? : net, dev, tb, data); 2467 /* Drivers should call free_netdev() in ->destructor 2468 * and unregister it on failure after registration 2469 * so that device could be finally freed in rtnl_unlock. 2470 */ 2471 if (err < 0) { 2472 /* If device is not registered at all, free it now */ 2473 if (dev->reg_state == NETREG_UNINITIALIZED) 2474 free_netdev(dev); 2475 goto out; 2476 } 2477 } else { 2478 err = register_netdevice(dev); 2479 if (err < 0) { 2480 free_netdev(dev); 2481 goto out; 2482 } 2483 } 2484 err = rtnl_configure_link(dev, ifm); 2485 if (err < 0) 2486 goto out_unregister; 2487 if (link_net) { 2488 err = dev_change_net_namespace(dev, dest_net, ifname); 2489 if (err < 0) 2490 goto out_unregister; 2491 } 2492 out: 2493 if (link_net) 2494 put_net(link_net); 2495 put_net(dest_net); 2496 return err; 2497 out_unregister: 2498 if (ops->newlink) { 2499 LIST_HEAD(list_kill); 2500 2501 ops->dellink(dev, &list_kill); 2502 unregister_netdevice_many(&list_kill); 2503 } else { 2504 unregister_netdevice(dev); 2505 } 2506 goto out; 2507 } 2508 } 2509 2510 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2511 { 2512 struct net *net = sock_net(skb->sk); 2513 struct ifinfomsg *ifm; 2514 char ifname[IFNAMSIZ]; 2515 struct nlattr *tb[IFLA_MAX+1]; 2516 struct net_device *dev = NULL; 2517 struct sk_buff *nskb; 2518 int err; 2519 u32 ext_filter_mask = 0; 2520 2521 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2522 if (err < 0) 2523 return err; 2524 2525 if (tb[IFLA_IFNAME]) 2526 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2527 2528 if (tb[IFLA_EXT_MASK]) 2529 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2530 2531 ifm = nlmsg_data(nlh); 2532 if (ifm->ifi_index > 0) 2533 dev = __dev_get_by_index(net, ifm->ifi_index); 2534 else if (tb[IFLA_IFNAME]) 2535 dev = __dev_get_by_name(net, ifname); 2536 else 2537 return -EINVAL; 2538 2539 if (dev == NULL) 2540 return -ENODEV; 2541 2542 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2543 if (nskb == NULL) 2544 return -ENOBUFS; 2545 2546 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2547 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2548 if (err < 0) { 2549 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2550 WARN_ON(err == -EMSGSIZE); 2551 kfree_skb(nskb); 2552 } else 2553 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2554 2555 return err; 2556 } 2557 2558 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2559 { 2560 struct net *net = sock_net(skb->sk); 2561 struct net_device *dev; 2562 struct nlattr *tb[IFLA_MAX+1]; 2563 u32 ext_filter_mask = 0; 2564 u16 min_ifinfo_dump_size = 0; 2565 int hdrlen; 2566 2567 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2568 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2569 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2570 2571 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2572 if (tb[IFLA_EXT_MASK]) 2573 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2574 } 2575 2576 if (!ext_filter_mask) 2577 return NLMSG_GOODSIZE; 2578 /* 2579 * traverse the list of net devices and compute the minimum 2580 * buffer size based upon the filter mask. 2581 */ 2582 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2583 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2584 if_nlmsg_size(dev, 2585 ext_filter_mask)); 2586 } 2587 2588 return min_ifinfo_dump_size; 2589 } 2590 2591 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2592 { 2593 int idx; 2594 int s_idx = cb->family; 2595 2596 if (s_idx == 0) 2597 s_idx = 1; 2598 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2599 int type = cb->nlh->nlmsg_type-RTM_BASE; 2600 if (idx < s_idx || idx == PF_PACKET) 2601 continue; 2602 if (rtnl_msg_handlers[idx] == NULL || 2603 rtnl_msg_handlers[idx][type].dumpit == NULL) 2604 continue; 2605 if (idx > s_idx) { 2606 memset(&cb->args[0], 0, sizeof(cb->args)); 2607 cb->prev_seq = 0; 2608 cb->seq = 0; 2609 } 2610 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2611 break; 2612 } 2613 cb->family = idx; 2614 2615 return skb->len; 2616 } 2617 2618 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2619 unsigned int change, gfp_t flags) 2620 { 2621 struct net *net = dev_net(dev); 2622 struct sk_buff *skb; 2623 int err = -ENOBUFS; 2624 size_t if_info_size; 2625 2626 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2627 if (skb == NULL) 2628 goto errout; 2629 2630 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2631 if (err < 0) { 2632 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2633 WARN_ON(err == -EMSGSIZE); 2634 kfree_skb(skb); 2635 goto errout; 2636 } 2637 return skb; 2638 errout: 2639 if (err < 0) 2640 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2641 return NULL; 2642 } 2643 2644 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2645 { 2646 struct net *net = dev_net(dev); 2647 2648 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2649 } 2650 2651 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2652 gfp_t flags) 2653 { 2654 struct sk_buff *skb; 2655 2656 if (dev->reg_state != NETREG_REGISTERED) 2657 return; 2658 2659 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2660 if (skb) 2661 rtmsg_ifinfo_send(skb, dev, flags); 2662 } 2663 EXPORT_SYMBOL(rtmsg_ifinfo); 2664 2665 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2666 struct net_device *dev, 2667 u8 *addr, u16 vid, u32 pid, u32 seq, 2668 int type, unsigned int flags, 2669 int nlflags, u16 ndm_state) 2670 { 2671 struct nlmsghdr *nlh; 2672 struct ndmsg *ndm; 2673 2674 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2675 if (!nlh) 2676 return -EMSGSIZE; 2677 2678 ndm = nlmsg_data(nlh); 2679 ndm->ndm_family = AF_BRIDGE; 2680 ndm->ndm_pad1 = 0; 2681 ndm->ndm_pad2 = 0; 2682 ndm->ndm_flags = flags; 2683 ndm->ndm_type = 0; 2684 ndm->ndm_ifindex = dev->ifindex; 2685 ndm->ndm_state = ndm_state; 2686 2687 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2688 goto nla_put_failure; 2689 if (vid) 2690 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2691 goto nla_put_failure; 2692 2693 nlmsg_end(skb, nlh); 2694 return 0; 2695 2696 nla_put_failure: 2697 nlmsg_cancel(skb, nlh); 2698 return -EMSGSIZE; 2699 } 2700 2701 static inline size_t rtnl_fdb_nlmsg_size(void) 2702 { 2703 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2704 } 2705 2706 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2707 u16 ndm_state) 2708 { 2709 struct net *net = dev_net(dev); 2710 struct sk_buff *skb; 2711 int err = -ENOBUFS; 2712 2713 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2714 if (!skb) 2715 goto errout; 2716 2717 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2718 0, 0, type, NTF_SELF, 0, ndm_state); 2719 if (err < 0) { 2720 kfree_skb(skb); 2721 goto errout; 2722 } 2723 2724 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2725 return; 2726 errout: 2727 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2728 } 2729 2730 /** 2731 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2732 */ 2733 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2734 struct nlattr *tb[], 2735 struct net_device *dev, 2736 const unsigned char *addr, u16 vid, 2737 u16 flags) 2738 { 2739 int err = -EINVAL; 2740 2741 /* If aging addresses are supported device will need to 2742 * implement its own handler for this. 2743 */ 2744 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2745 pr_info("%s: FDB only supports static addresses\n", dev->name); 2746 return err; 2747 } 2748 2749 if (vid) { 2750 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2751 return err; 2752 } 2753 2754 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2755 err = dev_uc_add_excl(dev, addr); 2756 else if (is_multicast_ether_addr(addr)) 2757 err = dev_mc_add_excl(dev, addr); 2758 2759 /* Only return duplicate errors if NLM_F_EXCL is set */ 2760 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2761 err = 0; 2762 2763 return err; 2764 } 2765 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2766 2767 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2768 { 2769 u16 vid = 0; 2770 2771 if (vlan_attr) { 2772 if (nla_len(vlan_attr) != sizeof(u16)) { 2773 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2774 return -EINVAL; 2775 } 2776 2777 vid = nla_get_u16(vlan_attr); 2778 2779 if (!vid || vid >= VLAN_VID_MASK) { 2780 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2781 vid); 2782 return -EINVAL; 2783 } 2784 } 2785 *p_vid = vid; 2786 return 0; 2787 } 2788 2789 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2790 { 2791 struct net *net = sock_net(skb->sk); 2792 struct ndmsg *ndm; 2793 struct nlattr *tb[NDA_MAX+1]; 2794 struct net_device *dev; 2795 u8 *addr; 2796 u16 vid; 2797 int err; 2798 2799 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2800 if (err < 0) 2801 return err; 2802 2803 ndm = nlmsg_data(nlh); 2804 if (ndm->ndm_ifindex == 0) { 2805 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2806 return -EINVAL; 2807 } 2808 2809 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2810 if (dev == NULL) { 2811 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2812 return -ENODEV; 2813 } 2814 2815 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2816 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2817 return -EINVAL; 2818 } 2819 2820 addr = nla_data(tb[NDA_LLADDR]); 2821 2822 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2823 if (err) 2824 return err; 2825 2826 err = -EOPNOTSUPP; 2827 2828 /* Support fdb on master device the net/bridge default case */ 2829 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2830 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2831 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2832 const struct net_device_ops *ops = br_dev->netdev_ops; 2833 2834 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2835 nlh->nlmsg_flags); 2836 if (err) 2837 goto out; 2838 else 2839 ndm->ndm_flags &= ~NTF_MASTER; 2840 } 2841 2842 /* Embedded bridge, macvlan, and any other device support */ 2843 if ((ndm->ndm_flags & NTF_SELF)) { 2844 if (dev->netdev_ops->ndo_fdb_add) 2845 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 2846 vid, 2847 nlh->nlmsg_flags); 2848 else 2849 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 2850 nlh->nlmsg_flags); 2851 2852 if (!err) { 2853 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 2854 ndm->ndm_state); 2855 ndm->ndm_flags &= ~NTF_SELF; 2856 } 2857 } 2858 out: 2859 return err; 2860 } 2861 2862 /** 2863 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 2864 */ 2865 int ndo_dflt_fdb_del(struct ndmsg *ndm, 2866 struct nlattr *tb[], 2867 struct net_device *dev, 2868 const unsigned char *addr, u16 vid) 2869 { 2870 int err = -EINVAL; 2871 2872 /* If aging addresses are supported device will need to 2873 * implement its own handler for this. 2874 */ 2875 if (!(ndm->ndm_state & NUD_PERMANENT)) { 2876 pr_info("%s: FDB only supports static addresses\n", dev->name); 2877 return err; 2878 } 2879 2880 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2881 err = dev_uc_del(dev, addr); 2882 else if (is_multicast_ether_addr(addr)) 2883 err = dev_mc_del(dev, addr); 2884 2885 return err; 2886 } 2887 EXPORT_SYMBOL(ndo_dflt_fdb_del); 2888 2889 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 2890 { 2891 struct net *net = sock_net(skb->sk); 2892 struct ndmsg *ndm; 2893 struct nlattr *tb[NDA_MAX+1]; 2894 struct net_device *dev; 2895 int err = -EINVAL; 2896 __u8 *addr; 2897 u16 vid; 2898 2899 if (!netlink_capable(skb, CAP_NET_ADMIN)) 2900 return -EPERM; 2901 2902 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2903 if (err < 0) 2904 return err; 2905 2906 ndm = nlmsg_data(nlh); 2907 if (ndm->ndm_ifindex == 0) { 2908 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 2909 return -EINVAL; 2910 } 2911 2912 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2913 if (dev == NULL) { 2914 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 2915 return -ENODEV; 2916 } 2917 2918 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2919 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 2920 return -EINVAL; 2921 } 2922 2923 addr = nla_data(tb[NDA_LLADDR]); 2924 2925 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2926 if (err) 2927 return err; 2928 2929 err = -EOPNOTSUPP; 2930 2931 /* Support fdb on master device the net/bridge default case */ 2932 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2933 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2934 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2935 const struct net_device_ops *ops = br_dev->netdev_ops; 2936 2937 if (ops->ndo_fdb_del) 2938 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 2939 2940 if (err) 2941 goto out; 2942 else 2943 ndm->ndm_flags &= ~NTF_MASTER; 2944 } 2945 2946 /* Embedded bridge, macvlan, and any other device support */ 2947 if (ndm->ndm_flags & NTF_SELF) { 2948 if (dev->netdev_ops->ndo_fdb_del) 2949 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 2950 vid); 2951 else 2952 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 2953 2954 if (!err) { 2955 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 2956 ndm->ndm_state); 2957 ndm->ndm_flags &= ~NTF_SELF; 2958 } 2959 } 2960 out: 2961 return err; 2962 } 2963 2964 static int nlmsg_populate_fdb(struct sk_buff *skb, 2965 struct netlink_callback *cb, 2966 struct net_device *dev, 2967 int *idx, 2968 struct netdev_hw_addr_list *list) 2969 { 2970 struct netdev_hw_addr *ha; 2971 int err; 2972 u32 portid, seq; 2973 2974 portid = NETLINK_CB(cb->skb).portid; 2975 seq = cb->nlh->nlmsg_seq; 2976 2977 list_for_each_entry(ha, &list->list, list) { 2978 if (*idx < cb->args[0]) 2979 goto skip; 2980 2981 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 2982 portid, seq, 2983 RTM_NEWNEIGH, NTF_SELF, 2984 NLM_F_MULTI, NUD_PERMANENT); 2985 if (err < 0) 2986 return err; 2987 skip: 2988 *idx += 1; 2989 } 2990 return 0; 2991 } 2992 2993 /** 2994 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 2995 * @nlh: netlink message header 2996 * @dev: netdevice 2997 * 2998 * Default netdevice operation to dump the existing unicast address list. 2999 * Returns number of addresses from list put in skb. 3000 */ 3001 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3002 struct netlink_callback *cb, 3003 struct net_device *dev, 3004 struct net_device *filter_dev, 3005 int idx) 3006 { 3007 int err; 3008 3009 netif_addr_lock_bh(dev); 3010 err = nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->uc); 3011 if (err) 3012 goto out; 3013 nlmsg_populate_fdb(skb, cb, dev, &idx, &dev->mc); 3014 out: 3015 netif_addr_unlock_bh(dev); 3016 cb->args[1] = err; 3017 return idx; 3018 } 3019 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3020 3021 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3022 { 3023 struct net_device *dev; 3024 struct nlattr *tb[IFLA_MAX+1]; 3025 struct net_device *br_dev = NULL; 3026 const struct net_device_ops *ops = NULL; 3027 const struct net_device_ops *cops = NULL; 3028 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3029 struct net *net = sock_net(skb->sk); 3030 int brport_idx = 0; 3031 int br_idx = 0; 3032 int idx = 0; 3033 3034 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 3035 ifla_policy) == 0) { 3036 if (tb[IFLA_MASTER]) 3037 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3038 } 3039 3040 brport_idx = ifm->ifi_index; 3041 3042 if (br_idx) { 3043 br_dev = __dev_get_by_index(net, br_idx); 3044 if (!br_dev) 3045 return -ENODEV; 3046 3047 ops = br_dev->netdev_ops; 3048 } 3049 3050 cb->args[1] = 0; 3051 for_each_netdev(net, dev) { 3052 if (brport_idx && (dev->ifindex != brport_idx)) 3053 continue; 3054 3055 if (!br_idx) { /* user did not specify a specific bridge */ 3056 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3057 br_dev = netdev_master_upper_dev_get(dev); 3058 cops = br_dev->netdev_ops; 3059 } 3060 3061 } else { 3062 if (dev != br_dev && 3063 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3064 continue; 3065 3066 if (br_dev != netdev_master_upper_dev_get(dev) && 3067 !(dev->priv_flags & IFF_EBRIDGE)) 3068 continue; 3069 3070 cops = ops; 3071 } 3072 3073 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3074 if (cops && cops->ndo_fdb_dump) 3075 idx = cops->ndo_fdb_dump(skb, cb, br_dev, dev, 3076 idx); 3077 } 3078 if (cb->args[1] == -EMSGSIZE) 3079 break; 3080 3081 if (dev->netdev_ops->ndo_fdb_dump) 3082 idx = dev->netdev_ops->ndo_fdb_dump(skb, cb, dev, NULL, 3083 idx); 3084 else 3085 idx = ndo_dflt_fdb_dump(skb, cb, dev, NULL, idx); 3086 if (cb->args[1] == -EMSGSIZE) 3087 break; 3088 3089 cops = NULL; 3090 } 3091 3092 cb->args[0] = idx; 3093 return skb->len; 3094 } 3095 3096 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3097 unsigned int attrnum, unsigned int flag) 3098 { 3099 if (mask & flag) 3100 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3101 return 0; 3102 } 3103 3104 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3105 struct net_device *dev, u16 mode, 3106 u32 flags, u32 mask, int nlflags, 3107 u32 filter_mask, 3108 int (*vlan_fill)(struct sk_buff *skb, 3109 struct net_device *dev, 3110 u32 filter_mask)) 3111 { 3112 struct nlmsghdr *nlh; 3113 struct ifinfomsg *ifm; 3114 struct nlattr *br_afspec; 3115 struct nlattr *protinfo; 3116 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3117 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3118 int err = 0; 3119 3120 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3121 if (nlh == NULL) 3122 return -EMSGSIZE; 3123 3124 ifm = nlmsg_data(nlh); 3125 ifm->ifi_family = AF_BRIDGE; 3126 ifm->__ifi_pad = 0; 3127 ifm->ifi_type = dev->type; 3128 ifm->ifi_index = dev->ifindex; 3129 ifm->ifi_flags = dev_get_flags(dev); 3130 ifm->ifi_change = 0; 3131 3132 3133 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3134 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3135 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3136 (br_dev && 3137 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3138 (dev->addr_len && 3139 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3140 (dev->ifindex != dev_get_iflink(dev) && 3141 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3142 goto nla_put_failure; 3143 3144 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3145 if (!br_afspec) 3146 goto nla_put_failure; 3147 3148 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3149 nla_nest_cancel(skb, br_afspec); 3150 goto nla_put_failure; 3151 } 3152 3153 if (mode != BRIDGE_MODE_UNDEF) { 3154 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3155 nla_nest_cancel(skb, br_afspec); 3156 goto nla_put_failure; 3157 } 3158 } 3159 if (vlan_fill) { 3160 err = vlan_fill(skb, dev, filter_mask); 3161 if (err) { 3162 nla_nest_cancel(skb, br_afspec); 3163 goto nla_put_failure; 3164 } 3165 } 3166 nla_nest_end(skb, br_afspec); 3167 3168 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3169 if (!protinfo) 3170 goto nla_put_failure; 3171 3172 if (brport_nla_put_flag(skb, flags, mask, 3173 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3174 brport_nla_put_flag(skb, flags, mask, 3175 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3176 brport_nla_put_flag(skb, flags, mask, 3177 IFLA_BRPORT_FAST_LEAVE, 3178 BR_MULTICAST_FAST_LEAVE) || 3179 brport_nla_put_flag(skb, flags, mask, 3180 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3181 brport_nla_put_flag(skb, flags, mask, 3182 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3183 brport_nla_put_flag(skb, flags, mask, 3184 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3185 brport_nla_put_flag(skb, flags, mask, 3186 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3187 brport_nla_put_flag(skb, flags, mask, 3188 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3189 nla_nest_cancel(skb, protinfo); 3190 goto nla_put_failure; 3191 } 3192 3193 nla_nest_end(skb, protinfo); 3194 3195 nlmsg_end(skb, nlh); 3196 return 0; 3197 nla_put_failure: 3198 nlmsg_cancel(skb, nlh); 3199 return err ? err : -EMSGSIZE; 3200 } 3201 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3202 3203 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3204 { 3205 struct net *net = sock_net(skb->sk); 3206 struct net_device *dev; 3207 int idx = 0; 3208 u32 portid = NETLINK_CB(cb->skb).portid; 3209 u32 seq = cb->nlh->nlmsg_seq; 3210 u32 filter_mask = 0; 3211 int err; 3212 3213 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3214 struct nlattr *extfilt; 3215 3216 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3217 IFLA_EXT_MASK); 3218 if (extfilt) { 3219 if (nla_len(extfilt) < sizeof(filter_mask)) 3220 return -EINVAL; 3221 3222 filter_mask = nla_get_u32(extfilt); 3223 } 3224 } 3225 3226 rcu_read_lock(); 3227 for_each_netdev_rcu(net, dev) { 3228 const struct net_device_ops *ops = dev->netdev_ops; 3229 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3230 3231 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3232 if (idx >= cb->args[0]) { 3233 err = br_dev->netdev_ops->ndo_bridge_getlink( 3234 skb, portid, seq, dev, 3235 filter_mask, NLM_F_MULTI); 3236 if (err < 0 && err != -EOPNOTSUPP) 3237 break; 3238 } 3239 idx++; 3240 } 3241 3242 if (ops->ndo_bridge_getlink) { 3243 if (idx >= cb->args[0]) { 3244 err = ops->ndo_bridge_getlink(skb, portid, 3245 seq, dev, 3246 filter_mask, 3247 NLM_F_MULTI); 3248 if (err < 0 && err != -EOPNOTSUPP) 3249 break; 3250 } 3251 idx++; 3252 } 3253 } 3254 rcu_read_unlock(); 3255 cb->args[0] = idx; 3256 3257 return skb->len; 3258 } 3259 3260 static inline size_t bridge_nlmsg_size(void) 3261 { 3262 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3263 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3264 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3265 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3266 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3267 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3268 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3269 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3270 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3271 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3272 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3273 } 3274 3275 static int rtnl_bridge_notify(struct net_device *dev) 3276 { 3277 struct net *net = dev_net(dev); 3278 struct sk_buff *skb; 3279 int err = -EOPNOTSUPP; 3280 3281 if (!dev->netdev_ops->ndo_bridge_getlink) 3282 return 0; 3283 3284 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3285 if (!skb) { 3286 err = -ENOMEM; 3287 goto errout; 3288 } 3289 3290 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3291 if (err < 0) 3292 goto errout; 3293 3294 if (!skb->len) 3295 goto errout; 3296 3297 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3298 return 0; 3299 errout: 3300 WARN_ON(err == -EMSGSIZE); 3301 kfree_skb(skb); 3302 if (err) 3303 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3304 return err; 3305 } 3306 3307 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3308 { 3309 struct net *net = sock_net(skb->sk); 3310 struct ifinfomsg *ifm; 3311 struct net_device *dev; 3312 struct nlattr *br_spec, *attr = NULL; 3313 int rem, err = -EOPNOTSUPP; 3314 u16 flags = 0; 3315 bool have_flags = false; 3316 3317 if (nlmsg_len(nlh) < sizeof(*ifm)) 3318 return -EINVAL; 3319 3320 ifm = nlmsg_data(nlh); 3321 if (ifm->ifi_family != AF_BRIDGE) 3322 return -EPFNOSUPPORT; 3323 3324 dev = __dev_get_by_index(net, ifm->ifi_index); 3325 if (!dev) { 3326 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3327 return -ENODEV; 3328 } 3329 3330 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3331 if (br_spec) { 3332 nla_for_each_nested(attr, br_spec, rem) { 3333 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3334 if (nla_len(attr) < sizeof(flags)) 3335 return -EINVAL; 3336 3337 have_flags = true; 3338 flags = nla_get_u16(attr); 3339 break; 3340 } 3341 } 3342 } 3343 3344 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3345 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3346 3347 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3348 err = -EOPNOTSUPP; 3349 goto out; 3350 } 3351 3352 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3353 if (err) 3354 goto out; 3355 3356 flags &= ~BRIDGE_FLAGS_MASTER; 3357 } 3358 3359 if ((flags & BRIDGE_FLAGS_SELF)) { 3360 if (!dev->netdev_ops->ndo_bridge_setlink) 3361 err = -EOPNOTSUPP; 3362 else 3363 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3364 flags); 3365 if (!err) { 3366 flags &= ~BRIDGE_FLAGS_SELF; 3367 3368 /* Generate event to notify upper layer of bridge 3369 * change 3370 */ 3371 err = rtnl_bridge_notify(dev); 3372 } 3373 } 3374 3375 if (have_flags) 3376 memcpy(nla_data(attr), &flags, sizeof(flags)); 3377 out: 3378 return err; 3379 } 3380 3381 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3382 { 3383 struct net *net = sock_net(skb->sk); 3384 struct ifinfomsg *ifm; 3385 struct net_device *dev; 3386 struct nlattr *br_spec, *attr = NULL; 3387 int rem, err = -EOPNOTSUPP; 3388 u16 flags = 0; 3389 bool have_flags = false; 3390 3391 if (nlmsg_len(nlh) < sizeof(*ifm)) 3392 return -EINVAL; 3393 3394 ifm = nlmsg_data(nlh); 3395 if (ifm->ifi_family != AF_BRIDGE) 3396 return -EPFNOSUPPORT; 3397 3398 dev = __dev_get_by_index(net, ifm->ifi_index); 3399 if (!dev) { 3400 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3401 return -ENODEV; 3402 } 3403 3404 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3405 if (br_spec) { 3406 nla_for_each_nested(attr, br_spec, rem) { 3407 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3408 if (nla_len(attr) < sizeof(flags)) 3409 return -EINVAL; 3410 3411 have_flags = true; 3412 flags = nla_get_u16(attr); 3413 break; 3414 } 3415 } 3416 } 3417 3418 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3419 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3420 3421 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3422 err = -EOPNOTSUPP; 3423 goto out; 3424 } 3425 3426 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3427 if (err) 3428 goto out; 3429 3430 flags &= ~BRIDGE_FLAGS_MASTER; 3431 } 3432 3433 if ((flags & BRIDGE_FLAGS_SELF)) { 3434 if (!dev->netdev_ops->ndo_bridge_dellink) 3435 err = -EOPNOTSUPP; 3436 else 3437 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3438 flags); 3439 3440 if (!err) { 3441 flags &= ~BRIDGE_FLAGS_SELF; 3442 3443 /* Generate event to notify upper layer of bridge 3444 * change 3445 */ 3446 err = rtnl_bridge_notify(dev); 3447 } 3448 } 3449 3450 if (have_flags) 3451 memcpy(nla_data(attr), &flags, sizeof(flags)); 3452 out: 3453 return err; 3454 } 3455 3456 /* Process one rtnetlink message. */ 3457 3458 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3459 { 3460 struct net *net = sock_net(skb->sk); 3461 rtnl_doit_func doit; 3462 int kind; 3463 int family; 3464 int type; 3465 int err; 3466 3467 type = nlh->nlmsg_type; 3468 if (type > RTM_MAX) 3469 return -EOPNOTSUPP; 3470 3471 type -= RTM_BASE; 3472 3473 /* All the messages must have at least 1 byte length */ 3474 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3475 return 0; 3476 3477 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3478 kind = type&3; 3479 3480 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 3481 return -EPERM; 3482 3483 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 3484 struct sock *rtnl; 3485 rtnl_dumpit_func dumpit; 3486 rtnl_calcit_func calcit; 3487 u16 min_dump_alloc = 0; 3488 3489 dumpit = rtnl_get_dumpit(family, type); 3490 if (dumpit == NULL) 3491 return -EOPNOTSUPP; 3492 calcit = rtnl_get_calcit(family, type); 3493 if (calcit) 3494 min_dump_alloc = calcit(skb, nlh); 3495 3496 __rtnl_unlock(); 3497 rtnl = net->rtnl; 3498 { 3499 struct netlink_dump_control c = { 3500 .dump = dumpit, 3501 .min_dump_alloc = min_dump_alloc, 3502 }; 3503 err = netlink_dump_start(rtnl, skb, nlh, &c); 3504 } 3505 rtnl_lock(); 3506 return err; 3507 } 3508 3509 doit = rtnl_get_doit(family, type); 3510 if (doit == NULL) 3511 return -EOPNOTSUPP; 3512 3513 return doit(skb, nlh); 3514 } 3515 3516 static void rtnetlink_rcv(struct sk_buff *skb) 3517 { 3518 rtnl_lock(); 3519 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 3520 rtnl_unlock(); 3521 } 3522 3523 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 3524 { 3525 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 3526 3527 switch (event) { 3528 case NETDEV_UP: 3529 case NETDEV_DOWN: 3530 case NETDEV_PRE_UP: 3531 case NETDEV_POST_INIT: 3532 case NETDEV_REGISTER: 3533 case NETDEV_CHANGE: 3534 case NETDEV_PRE_TYPE_CHANGE: 3535 case NETDEV_GOING_DOWN: 3536 case NETDEV_UNREGISTER: 3537 case NETDEV_UNREGISTER_FINAL: 3538 case NETDEV_RELEASE: 3539 case NETDEV_JOIN: 3540 case NETDEV_BONDING_INFO: 3541 break; 3542 default: 3543 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 3544 break; 3545 } 3546 return NOTIFY_DONE; 3547 } 3548 3549 static struct notifier_block rtnetlink_dev_notifier = { 3550 .notifier_call = rtnetlink_event, 3551 }; 3552 3553 3554 static int __net_init rtnetlink_net_init(struct net *net) 3555 { 3556 struct sock *sk; 3557 struct netlink_kernel_cfg cfg = { 3558 .groups = RTNLGRP_MAX, 3559 .input = rtnetlink_rcv, 3560 .cb_mutex = &rtnl_mutex, 3561 .flags = NL_CFG_F_NONROOT_RECV, 3562 }; 3563 3564 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 3565 if (!sk) 3566 return -ENOMEM; 3567 net->rtnl = sk; 3568 return 0; 3569 } 3570 3571 static void __net_exit rtnetlink_net_exit(struct net *net) 3572 { 3573 netlink_kernel_release(net->rtnl); 3574 net->rtnl = NULL; 3575 } 3576 3577 static struct pernet_operations rtnetlink_net_ops = { 3578 .init = rtnetlink_net_init, 3579 .exit = rtnetlink_net_exit, 3580 }; 3581 3582 void __init rtnetlink_init(void) 3583 { 3584 if (register_pernet_subsys(&rtnetlink_net_ops)) 3585 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 3586 3587 register_netdevice_notifier(&rtnetlink_dev_notifier); 3588 3589 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 3590 rtnl_dump_ifinfo, rtnl_calcit); 3591 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 3592 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 3593 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 3594 3595 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 3596 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 3597 3598 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 3599 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 3600 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 3601 3602 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 3603 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 3604 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 3605 } 3606