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 static struct sk_buff *defer_kfree_skb_list; 75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) 76 { 77 if (head && tail) { 78 tail->next = defer_kfree_skb_list; 79 defer_kfree_skb_list = head; 80 } 81 } 82 EXPORT_SYMBOL(rtnl_kfree_skbs); 83 84 void __rtnl_unlock(void) 85 { 86 struct sk_buff *head = defer_kfree_skb_list; 87 88 defer_kfree_skb_list = NULL; 89 90 mutex_unlock(&rtnl_mutex); 91 92 while (head) { 93 struct sk_buff *next = head->next; 94 95 kfree_skb(head); 96 cond_resched(); 97 head = next; 98 } 99 } 100 101 void rtnl_unlock(void) 102 { 103 /* This fellow will unlock it for us. */ 104 netdev_run_todo(); 105 } 106 EXPORT_SYMBOL(rtnl_unlock); 107 108 int rtnl_trylock(void) 109 { 110 return mutex_trylock(&rtnl_mutex); 111 } 112 EXPORT_SYMBOL(rtnl_trylock); 113 114 int rtnl_is_locked(void) 115 { 116 return mutex_is_locked(&rtnl_mutex); 117 } 118 EXPORT_SYMBOL(rtnl_is_locked); 119 120 #ifdef CONFIG_PROVE_LOCKING 121 bool lockdep_rtnl_is_held(void) 122 { 123 return lockdep_is_held(&rtnl_mutex); 124 } 125 EXPORT_SYMBOL(lockdep_rtnl_is_held); 126 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 127 128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 129 130 static inline int rtm_msgindex(int msgtype) 131 { 132 int msgindex = msgtype - RTM_BASE; 133 134 /* 135 * msgindex < 0 implies someone tried to register a netlink 136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 137 * the message type has not been added to linux/rtnetlink.h 138 */ 139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 140 141 return msgindex; 142 } 143 144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 145 { 146 struct rtnl_link *tab; 147 148 if (protocol <= RTNL_FAMILY_MAX) 149 tab = rtnl_msg_handlers[protocol]; 150 else 151 tab = NULL; 152 153 if (tab == NULL || tab[msgindex].doit == NULL) 154 tab = rtnl_msg_handlers[PF_UNSPEC]; 155 156 return tab[msgindex].doit; 157 } 158 159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 160 { 161 struct rtnl_link *tab; 162 163 if (protocol <= RTNL_FAMILY_MAX) 164 tab = rtnl_msg_handlers[protocol]; 165 else 166 tab = NULL; 167 168 if (tab == NULL || tab[msgindex].dumpit == NULL) 169 tab = rtnl_msg_handlers[PF_UNSPEC]; 170 171 return tab[msgindex].dumpit; 172 } 173 174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 175 { 176 struct rtnl_link *tab; 177 178 if (protocol <= RTNL_FAMILY_MAX) 179 tab = rtnl_msg_handlers[protocol]; 180 else 181 tab = NULL; 182 183 if (tab == NULL || tab[msgindex].calcit == NULL) 184 tab = rtnl_msg_handlers[PF_UNSPEC]; 185 186 return tab[msgindex].calcit; 187 } 188 189 /** 190 * __rtnl_register - Register a rtnetlink message type 191 * @protocol: Protocol family or PF_UNSPEC 192 * @msgtype: rtnetlink message type 193 * @doit: Function pointer called for each request message 194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 195 * @calcit: Function pointer to calc size of dump message 196 * 197 * Registers the specified function pointers (at least one of them has 198 * to be non-NULL) to be called whenever a request message for the 199 * specified protocol family and message type is received. 200 * 201 * The special protocol family PF_UNSPEC may be used to define fallback 202 * function pointers for the case when no entry for the specific protocol 203 * family exists. 204 * 205 * Returns 0 on success or a negative error code. 206 */ 207 int __rtnl_register(int protocol, int msgtype, 208 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 209 rtnl_calcit_func calcit) 210 { 211 struct rtnl_link *tab; 212 int msgindex; 213 214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 215 msgindex = rtm_msgindex(msgtype); 216 217 tab = rtnl_msg_handlers[protocol]; 218 if (tab == NULL) { 219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 220 if (tab == NULL) 221 return -ENOBUFS; 222 223 rtnl_msg_handlers[protocol] = tab; 224 } 225 226 if (doit) 227 tab[msgindex].doit = doit; 228 229 if (dumpit) 230 tab[msgindex].dumpit = dumpit; 231 232 if (calcit) 233 tab[msgindex].calcit = calcit; 234 235 return 0; 236 } 237 EXPORT_SYMBOL_GPL(__rtnl_register); 238 239 /** 240 * rtnl_register - Register a rtnetlink message type 241 * 242 * Identical to __rtnl_register() but panics on failure. This is useful 243 * as failure of this function is very unlikely, it can only happen due 244 * to lack of memory when allocating the chain to store all message 245 * handlers for a protocol. Meant for use in init functions where lack 246 * of memory implies no sense in continuing. 247 */ 248 void rtnl_register(int protocol, int msgtype, 249 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 250 rtnl_calcit_func calcit) 251 { 252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 253 panic("Unable to register rtnetlink message handler, " 254 "protocol = %d, message type = %d\n", 255 protocol, msgtype); 256 } 257 EXPORT_SYMBOL_GPL(rtnl_register); 258 259 /** 260 * rtnl_unregister - Unregister a rtnetlink message type 261 * @protocol: Protocol family or PF_UNSPEC 262 * @msgtype: rtnetlink message type 263 * 264 * Returns 0 on success or a negative error code. 265 */ 266 int rtnl_unregister(int protocol, int msgtype) 267 { 268 int msgindex; 269 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 271 msgindex = rtm_msgindex(msgtype); 272 273 if (rtnl_msg_handlers[protocol] == NULL) 274 return -ENOENT; 275 276 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 278 279 return 0; 280 } 281 EXPORT_SYMBOL_GPL(rtnl_unregister); 282 283 /** 284 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 285 * @protocol : Protocol family or PF_UNSPEC 286 * 287 * Identical to calling rtnl_unregster() for all registered message types 288 * of a certain protocol family. 289 */ 290 void rtnl_unregister_all(int protocol) 291 { 292 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 293 294 kfree(rtnl_msg_handlers[protocol]); 295 rtnl_msg_handlers[protocol] = NULL; 296 } 297 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 298 299 static LIST_HEAD(link_ops); 300 301 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 302 { 303 const struct rtnl_link_ops *ops; 304 305 list_for_each_entry(ops, &link_ops, list) { 306 if (!strcmp(ops->kind, kind)) 307 return ops; 308 } 309 return NULL; 310 } 311 312 /** 313 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 314 * @ops: struct rtnl_link_ops * to register 315 * 316 * The caller must hold the rtnl_mutex. This function should be used 317 * by drivers that create devices during module initialization. It 318 * must be called before registering the devices. 319 * 320 * Returns 0 on success or a negative error code. 321 */ 322 int __rtnl_link_register(struct rtnl_link_ops *ops) 323 { 324 if (rtnl_link_ops_get(ops->kind)) 325 return -EEXIST; 326 327 /* The check for setup is here because if ops 328 * does not have that filled up, it is not possible 329 * to use the ops for creating device. So do not 330 * fill up dellink as well. That disables rtnl_dellink. 331 */ 332 if (ops->setup && !ops->dellink) 333 ops->dellink = unregister_netdevice_queue; 334 335 list_add_tail(&ops->list, &link_ops); 336 return 0; 337 } 338 EXPORT_SYMBOL_GPL(__rtnl_link_register); 339 340 /** 341 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 342 * @ops: struct rtnl_link_ops * to register 343 * 344 * Returns 0 on success or a negative error code. 345 */ 346 int rtnl_link_register(struct rtnl_link_ops *ops) 347 { 348 int err; 349 350 rtnl_lock(); 351 err = __rtnl_link_register(ops); 352 rtnl_unlock(); 353 return err; 354 } 355 EXPORT_SYMBOL_GPL(rtnl_link_register); 356 357 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 358 { 359 struct net_device *dev; 360 LIST_HEAD(list_kill); 361 362 for_each_netdev(net, dev) { 363 if (dev->rtnl_link_ops == ops) 364 ops->dellink(dev, &list_kill); 365 } 366 unregister_netdevice_many(&list_kill); 367 } 368 369 /** 370 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 371 * @ops: struct rtnl_link_ops * to unregister 372 * 373 * The caller must hold the rtnl_mutex. 374 */ 375 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 376 { 377 struct net *net; 378 379 for_each_net(net) { 380 __rtnl_kill_links(net, ops); 381 } 382 list_del(&ops->list); 383 } 384 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 385 386 /* Return with the rtnl_lock held when there are no network 387 * devices unregistering in any network namespace. 388 */ 389 static void rtnl_lock_unregistering_all(void) 390 { 391 struct net *net; 392 bool unregistering; 393 DEFINE_WAIT_FUNC(wait, woken_wake_function); 394 395 add_wait_queue(&netdev_unregistering_wq, &wait); 396 for (;;) { 397 unregistering = false; 398 rtnl_lock(); 399 for_each_net(net) { 400 if (net->dev_unreg_count > 0) { 401 unregistering = true; 402 break; 403 } 404 } 405 if (!unregistering) 406 break; 407 __rtnl_unlock(); 408 409 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 410 } 411 remove_wait_queue(&netdev_unregistering_wq, &wait); 412 } 413 414 /** 415 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 416 * @ops: struct rtnl_link_ops * to unregister 417 */ 418 void rtnl_link_unregister(struct rtnl_link_ops *ops) 419 { 420 /* Close the race with cleanup_net() */ 421 mutex_lock(&net_mutex); 422 rtnl_lock_unregistering_all(); 423 __rtnl_link_unregister(ops); 424 rtnl_unlock(); 425 mutex_unlock(&net_mutex); 426 } 427 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 428 429 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 430 { 431 struct net_device *master_dev; 432 const struct rtnl_link_ops *ops; 433 434 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 435 if (!master_dev) 436 return 0; 437 ops = master_dev->rtnl_link_ops; 438 if (!ops || !ops->get_slave_size) 439 return 0; 440 /* IFLA_INFO_SLAVE_DATA + nested data */ 441 return nla_total_size(sizeof(struct nlattr)) + 442 ops->get_slave_size(master_dev, dev); 443 } 444 445 static size_t rtnl_link_get_size(const struct net_device *dev) 446 { 447 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 448 size_t size; 449 450 if (!ops) 451 return 0; 452 453 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 454 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 455 456 if (ops->get_size) 457 /* IFLA_INFO_DATA + nested data */ 458 size += nla_total_size(sizeof(struct nlattr)) + 459 ops->get_size(dev); 460 461 if (ops->get_xstats_size) 462 /* IFLA_INFO_XSTATS */ 463 size += nla_total_size(ops->get_xstats_size(dev)); 464 465 size += rtnl_link_get_slave_info_data_size(dev); 466 467 return size; 468 } 469 470 static LIST_HEAD(rtnl_af_ops); 471 472 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 473 { 474 const struct rtnl_af_ops *ops; 475 476 list_for_each_entry(ops, &rtnl_af_ops, list) { 477 if (ops->family == family) 478 return ops; 479 } 480 481 return NULL; 482 } 483 484 /** 485 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 486 * @ops: struct rtnl_af_ops * to register 487 * 488 * Returns 0 on success or a negative error code. 489 */ 490 void rtnl_af_register(struct rtnl_af_ops *ops) 491 { 492 rtnl_lock(); 493 list_add_tail(&ops->list, &rtnl_af_ops); 494 rtnl_unlock(); 495 } 496 EXPORT_SYMBOL_GPL(rtnl_af_register); 497 498 /** 499 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 500 * @ops: struct rtnl_af_ops * to unregister 501 * 502 * The caller must hold the rtnl_mutex. 503 */ 504 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 505 { 506 list_del(&ops->list); 507 } 508 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 509 510 /** 511 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 512 * @ops: struct rtnl_af_ops * to unregister 513 */ 514 void rtnl_af_unregister(struct rtnl_af_ops *ops) 515 { 516 rtnl_lock(); 517 __rtnl_af_unregister(ops); 518 rtnl_unlock(); 519 } 520 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 521 522 static size_t rtnl_link_get_af_size(const struct net_device *dev, 523 u32 ext_filter_mask) 524 { 525 struct rtnl_af_ops *af_ops; 526 size_t size; 527 528 /* IFLA_AF_SPEC */ 529 size = nla_total_size(sizeof(struct nlattr)); 530 531 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 532 if (af_ops->get_link_af_size) { 533 /* AF_* + nested data */ 534 size += nla_total_size(sizeof(struct nlattr)) + 535 af_ops->get_link_af_size(dev, ext_filter_mask); 536 } 537 } 538 539 return size; 540 } 541 542 static bool rtnl_have_link_slave_info(const struct net_device *dev) 543 { 544 struct net_device *master_dev; 545 546 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 547 if (master_dev && master_dev->rtnl_link_ops) 548 return true; 549 return false; 550 } 551 552 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 553 const struct net_device *dev) 554 { 555 struct net_device *master_dev; 556 const struct rtnl_link_ops *ops; 557 struct nlattr *slave_data; 558 int err; 559 560 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 561 if (!master_dev) 562 return 0; 563 ops = master_dev->rtnl_link_ops; 564 if (!ops) 565 return 0; 566 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 567 return -EMSGSIZE; 568 if (ops->fill_slave_info) { 569 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 570 if (!slave_data) 571 return -EMSGSIZE; 572 err = ops->fill_slave_info(skb, master_dev, dev); 573 if (err < 0) 574 goto err_cancel_slave_data; 575 nla_nest_end(skb, slave_data); 576 } 577 return 0; 578 579 err_cancel_slave_data: 580 nla_nest_cancel(skb, slave_data); 581 return err; 582 } 583 584 static int rtnl_link_info_fill(struct sk_buff *skb, 585 const struct net_device *dev) 586 { 587 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 588 struct nlattr *data; 589 int err; 590 591 if (!ops) 592 return 0; 593 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 594 return -EMSGSIZE; 595 if (ops->fill_xstats) { 596 err = ops->fill_xstats(skb, dev); 597 if (err < 0) 598 return err; 599 } 600 if (ops->fill_info) { 601 data = nla_nest_start(skb, IFLA_INFO_DATA); 602 if (data == NULL) 603 return -EMSGSIZE; 604 err = ops->fill_info(skb, dev); 605 if (err < 0) 606 goto err_cancel_data; 607 nla_nest_end(skb, data); 608 } 609 return 0; 610 611 err_cancel_data: 612 nla_nest_cancel(skb, data); 613 return err; 614 } 615 616 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 617 { 618 struct nlattr *linkinfo; 619 int err = -EMSGSIZE; 620 621 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 622 if (linkinfo == NULL) 623 goto out; 624 625 err = rtnl_link_info_fill(skb, dev); 626 if (err < 0) 627 goto err_cancel_link; 628 629 err = rtnl_link_slave_info_fill(skb, dev); 630 if (err < 0) 631 goto err_cancel_link; 632 633 nla_nest_end(skb, linkinfo); 634 return 0; 635 636 err_cancel_link: 637 nla_nest_cancel(skb, linkinfo); 638 out: 639 return err; 640 } 641 642 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 643 { 644 struct sock *rtnl = net->rtnl; 645 int err = 0; 646 647 NETLINK_CB(skb).dst_group = group; 648 if (echo) 649 atomic_inc(&skb->users); 650 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 651 if (echo) 652 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 653 return err; 654 } 655 656 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 657 { 658 struct sock *rtnl = net->rtnl; 659 660 return nlmsg_unicast(rtnl, skb, pid); 661 } 662 EXPORT_SYMBOL(rtnl_unicast); 663 664 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 665 struct nlmsghdr *nlh, gfp_t flags) 666 { 667 struct sock *rtnl = net->rtnl; 668 int report = 0; 669 670 if (nlh) 671 report = nlmsg_report(nlh); 672 673 nlmsg_notify(rtnl, skb, pid, group, report, flags); 674 } 675 EXPORT_SYMBOL(rtnl_notify); 676 677 void rtnl_set_sk_err(struct net *net, u32 group, int error) 678 { 679 struct sock *rtnl = net->rtnl; 680 681 netlink_set_err(rtnl, 0, group, error); 682 } 683 EXPORT_SYMBOL(rtnl_set_sk_err); 684 685 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 686 { 687 struct nlattr *mx; 688 int i, valid = 0; 689 690 mx = nla_nest_start(skb, RTA_METRICS); 691 if (mx == NULL) 692 return -ENOBUFS; 693 694 for (i = 0; i < RTAX_MAX; i++) { 695 if (metrics[i]) { 696 if (i == RTAX_CC_ALGO - 1) { 697 char tmp[TCP_CA_NAME_MAX], *name; 698 699 name = tcp_ca_get_name_by_key(metrics[i], tmp); 700 if (!name) 701 continue; 702 if (nla_put_string(skb, i + 1, name)) 703 goto nla_put_failure; 704 } else if (i == RTAX_FEATURES - 1) { 705 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 706 707 if (!user_features) 708 continue; 709 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 710 if (nla_put_u32(skb, i + 1, user_features)) 711 goto nla_put_failure; 712 } else { 713 if (nla_put_u32(skb, i + 1, metrics[i])) 714 goto nla_put_failure; 715 } 716 valid++; 717 } 718 } 719 720 if (!valid) { 721 nla_nest_cancel(skb, mx); 722 return 0; 723 } 724 725 return nla_nest_end(skb, mx); 726 727 nla_put_failure: 728 nla_nest_cancel(skb, mx); 729 return -EMSGSIZE; 730 } 731 EXPORT_SYMBOL(rtnetlink_put_metrics); 732 733 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 734 long expires, u32 error) 735 { 736 struct rta_cacheinfo ci = { 737 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 738 .rta_used = dst->__use, 739 .rta_clntref = atomic_read(&(dst->__refcnt)), 740 .rta_error = error, 741 .rta_id = id, 742 }; 743 744 if (expires) { 745 unsigned long clock; 746 747 clock = jiffies_to_clock_t(abs(expires)); 748 clock = min_t(unsigned long, clock, INT_MAX); 749 ci.rta_expires = (expires > 0) ? clock : -clock; 750 } 751 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 752 } 753 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 754 755 static void set_operstate(struct net_device *dev, unsigned char transition) 756 { 757 unsigned char operstate = dev->operstate; 758 759 switch (transition) { 760 case IF_OPER_UP: 761 if ((operstate == IF_OPER_DORMANT || 762 operstate == IF_OPER_UNKNOWN) && 763 !netif_dormant(dev)) 764 operstate = IF_OPER_UP; 765 break; 766 767 case IF_OPER_DORMANT: 768 if (operstate == IF_OPER_UP || 769 operstate == IF_OPER_UNKNOWN) 770 operstate = IF_OPER_DORMANT; 771 break; 772 } 773 774 if (dev->operstate != operstate) { 775 write_lock_bh(&dev_base_lock); 776 dev->operstate = operstate; 777 write_unlock_bh(&dev_base_lock); 778 netdev_state_change(dev); 779 } 780 } 781 782 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 783 { 784 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 785 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 786 } 787 788 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 789 const struct ifinfomsg *ifm) 790 { 791 unsigned int flags = ifm->ifi_flags; 792 793 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 794 if (ifm->ifi_change) 795 flags = (flags & ifm->ifi_change) | 796 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 797 798 return flags; 799 } 800 801 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 802 const struct rtnl_link_stats64 *b) 803 { 804 a->rx_packets = b->rx_packets; 805 a->tx_packets = b->tx_packets; 806 a->rx_bytes = b->rx_bytes; 807 a->tx_bytes = b->tx_bytes; 808 a->rx_errors = b->rx_errors; 809 a->tx_errors = b->tx_errors; 810 a->rx_dropped = b->rx_dropped; 811 a->tx_dropped = b->tx_dropped; 812 813 a->multicast = b->multicast; 814 a->collisions = b->collisions; 815 816 a->rx_length_errors = b->rx_length_errors; 817 a->rx_over_errors = b->rx_over_errors; 818 a->rx_crc_errors = b->rx_crc_errors; 819 a->rx_frame_errors = b->rx_frame_errors; 820 a->rx_fifo_errors = b->rx_fifo_errors; 821 a->rx_missed_errors = b->rx_missed_errors; 822 823 a->tx_aborted_errors = b->tx_aborted_errors; 824 a->tx_carrier_errors = b->tx_carrier_errors; 825 a->tx_fifo_errors = b->tx_fifo_errors; 826 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 827 a->tx_window_errors = b->tx_window_errors; 828 829 a->rx_compressed = b->rx_compressed; 830 a->tx_compressed = b->tx_compressed; 831 832 a->rx_nohandler = b->rx_nohandler; 833 } 834 835 /* All VF info */ 836 static inline int rtnl_vfinfo_size(const struct net_device *dev, 837 u32 ext_filter_mask) 838 { 839 if (dev->dev.parent && dev_is_pci(dev->dev.parent) && 840 (ext_filter_mask & RTEXT_FILTER_VF)) { 841 int num_vfs = dev_num_vf(dev->dev.parent); 842 size_t size = nla_total_size(sizeof(struct nlattr)); 843 size += nla_total_size(num_vfs * sizeof(struct nlattr)); 844 size += num_vfs * 845 (nla_total_size(sizeof(struct ifla_vf_mac)) + 846 nla_total_size(MAX_VLAN_LIST_LEN * 847 sizeof(struct nlattr)) + 848 nla_total_size(MAX_VLAN_LIST_LEN * 849 sizeof(struct ifla_vf_vlan_info)) + 850 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 851 nla_total_size(sizeof(struct ifla_vf_rate)) + 852 nla_total_size(sizeof(struct ifla_vf_link_state)) + 853 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 854 /* IFLA_VF_STATS_RX_PACKETS */ 855 nla_total_size_64bit(sizeof(__u64)) + 856 /* IFLA_VF_STATS_TX_PACKETS */ 857 nla_total_size_64bit(sizeof(__u64)) + 858 /* IFLA_VF_STATS_RX_BYTES */ 859 nla_total_size_64bit(sizeof(__u64)) + 860 /* IFLA_VF_STATS_TX_BYTES */ 861 nla_total_size_64bit(sizeof(__u64)) + 862 /* IFLA_VF_STATS_BROADCAST */ 863 nla_total_size_64bit(sizeof(__u64)) + 864 /* IFLA_VF_STATS_MULTICAST */ 865 nla_total_size_64bit(sizeof(__u64)) + 866 nla_total_size(sizeof(struct ifla_vf_trust))); 867 return size; 868 } else 869 return 0; 870 } 871 872 static size_t rtnl_port_size(const struct net_device *dev, 873 u32 ext_filter_mask) 874 { 875 size_t port_size = nla_total_size(4) /* PORT_VF */ 876 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 877 + nla_total_size(sizeof(struct ifla_port_vsi)) 878 /* PORT_VSI_TYPE */ 879 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 880 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 881 + nla_total_size(1) /* PROT_VDP_REQUEST */ 882 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 883 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 884 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 885 + port_size; 886 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 887 + port_size; 888 889 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 890 !(ext_filter_mask & RTEXT_FILTER_VF)) 891 return 0; 892 if (dev_num_vf(dev->dev.parent)) 893 return port_self_size + vf_ports_size + 894 vf_port_size * dev_num_vf(dev->dev.parent); 895 else 896 return port_self_size; 897 } 898 899 static size_t rtnl_xdp_size(const struct net_device *dev) 900 { 901 size_t xdp_size = nla_total_size(1); /* XDP_ATTACHED */ 902 903 if (!dev->netdev_ops->ndo_xdp) 904 return 0; 905 else 906 return xdp_size; 907 } 908 909 static noinline size_t if_nlmsg_size(const struct net_device *dev, 910 u32 ext_filter_mask) 911 { 912 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 913 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 914 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 915 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 916 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 917 + nla_total_size(sizeof(struct rtnl_link_stats)) 918 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 919 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 920 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 921 + nla_total_size(4) /* IFLA_TXQLEN */ 922 + nla_total_size(4) /* IFLA_WEIGHT */ 923 + nla_total_size(4) /* IFLA_MTU */ 924 + nla_total_size(4) /* IFLA_LINK */ 925 + nla_total_size(4) /* IFLA_MASTER */ 926 + nla_total_size(1) /* IFLA_CARRIER */ 927 + nla_total_size(4) /* IFLA_PROMISCUITY */ 928 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 929 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 930 + nla_total_size(4) /* IFLA_MAX_GSO_SEGS */ 931 + nla_total_size(4) /* IFLA_MAX_GSO_SIZE */ 932 + nla_total_size(1) /* IFLA_OPERSTATE */ 933 + nla_total_size(1) /* IFLA_LINKMODE */ 934 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 935 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 936 + nla_total_size(ext_filter_mask 937 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 938 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 939 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 940 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 941 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 942 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 943 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 944 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 945 + rtnl_xdp_size(dev) /* IFLA_XDP */ 946 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 947 948 } 949 950 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 951 { 952 struct nlattr *vf_ports; 953 struct nlattr *vf_port; 954 int vf; 955 int err; 956 957 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 958 if (!vf_ports) 959 return -EMSGSIZE; 960 961 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 962 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 963 if (!vf_port) 964 goto nla_put_failure; 965 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 966 goto nla_put_failure; 967 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 968 if (err == -EMSGSIZE) 969 goto nla_put_failure; 970 if (err) { 971 nla_nest_cancel(skb, vf_port); 972 continue; 973 } 974 nla_nest_end(skb, vf_port); 975 } 976 977 nla_nest_end(skb, vf_ports); 978 979 return 0; 980 981 nla_put_failure: 982 nla_nest_cancel(skb, vf_ports); 983 return -EMSGSIZE; 984 } 985 986 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 987 { 988 struct nlattr *port_self; 989 int err; 990 991 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 992 if (!port_self) 993 return -EMSGSIZE; 994 995 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 996 if (err) { 997 nla_nest_cancel(skb, port_self); 998 return (err == -EMSGSIZE) ? err : 0; 999 } 1000 1001 nla_nest_end(skb, port_self); 1002 1003 return 0; 1004 } 1005 1006 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1007 u32 ext_filter_mask) 1008 { 1009 int err; 1010 1011 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1012 !(ext_filter_mask & RTEXT_FILTER_VF)) 1013 return 0; 1014 1015 err = rtnl_port_self_fill(skb, dev); 1016 if (err) 1017 return err; 1018 1019 if (dev_num_vf(dev->dev.parent)) { 1020 err = rtnl_vf_ports_fill(skb, dev); 1021 if (err) 1022 return err; 1023 } 1024 1025 return 0; 1026 } 1027 1028 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1029 { 1030 int err; 1031 struct netdev_phys_item_id ppid; 1032 1033 err = dev_get_phys_port_id(dev, &ppid); 1034 if (err) { 1035 if (err == -EOPNOTSUPP) 1036 return 0; 1037 return err; 1038 } 1039 1040 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1041 return -EMSGSIZE; 1042 1043 return 0; 1044 } 1045 1046 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1047 { 1048 char name[IFNAMSIZ]; 1049 int err; 1050 1051 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1052 if (err) { 1053 if (err == -EOPNOTSUPP) 1054 return 0; 1055 return err; 1056 } 1057 1058 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 1059 return -EMSGSIZE; 1060 1061 return 0; 1062 } 1063 1064 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1065 { 1066 int err; 1067 struct switchdev_attr attr = { 1068 .orig_dev = dev, 1069 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1070 .flags = SWITCHDEV_F_NO_RECURSE, 1071 }; 1072 1073 err = switchdev_port_attr_get(dev, &attr); 1074 if (err) { 1075 if (err == -EOPNOTSUPP) 1076 return 0; 1077 return err; 1078 } 1079 1080 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1081 attr.u.ppid.id)) 1082 return -EMSGSIZE; 1083 1084 return 0; 1085 } 1086 1087 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1088 struct net_device *dev) 1089 { 1090 struct rtnl_link_stats64 *sp; 1091 struct nlattr *attr; 1092 1093 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1094 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1095 if (!attr) 1096 return -EMSGSIZE; 1097 1098 sp = nla_data(attr); 1099 dev_get_stats(dev, sp); 1100 1101 attr = nla_reserve(skb, IFLA_STATS, 1102 sizeof(struct rtnl_link_stats)); 1103 if (!attr) 1104 return -EMSGSIZE; 1105 1106 copy_rtnl_link_stats(nla_data(attr), sp); 1107 1108 return 0; 1109 } 1110 1111 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1112 struct net_device *dev, 1113 int vfs_num, 1114 struct nlattr *vfinfo) 1115 { 1116 struct ifla_vf_rss_query_en vf_rss_query_en; 1117 struct nlattr *vf, *vfstats, *vfvlanlist; 1118 struct ifla_vf_link_state vf_linkstate; 1119 struct ifla_vf_vlan_info vf_vlan_info; 1120 struct ifla_vf_spoofchk vf_spoofchk; 1121 struct ifla_vf_tx_rate vf_tx_rate; 1122 struct ifla_vf_stats vf_stats; 1123 struct ifla_vf_trust vf_trust; 1124 struct ifla_vf_vlan vf_vlan; 1125 struct ifla_vf_rate vf_rate; 1126 struct ifla_vf_mac vf_mac; 1127 struct ifla_vf_info ivi; 1128 1129 /* Not all SR-IOV capable drivers support the 1130 * spoofcheck and "RSS query enable" query. Preset to 1131 * -1 so the user space tool can detect that the driver 1132 * didn't report anything. 1133 */ 1134 ivi.spoofchk = -1; 1135 ivi.rss_query_en = -1; 1136 ivi.trusted = -1; 1137 memset(ivi.mac, 0, sizeof(ivi.mac)); 1138 /* The default value for VF link state is "auto" 1139 * IFLA_VF_LINK_STATE_AUTO which equals zero 1140 */ 1141 ivi.linkstate = 0; 1142 /* VLAN Protocol by default is 802.1Q */ 1143 ivi.vlan_proto = htons(ETH_P_8021Q); 1144 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1145 return 0; 1146 1147 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1148 1149 vf_mac.vf = 1150 vf_vlan.vf = 1151 vf_vlan_info.vf = 1152 vf_rate.vf = 1153 vf_tx_rate.vf = 1154 vf_spoofchk.vf = 1155 vf_linkstate.vf = 1156 vf_rss_query_en.vf = 1157 vf_trust.vf = ivi.vf; 1158 1159 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1160 vf_vlan.vlan = ivi.vlan; 1161 vf_vlan.qos = ivi.qos; 1162 vf_vlan_info.vlan = ivi.vlan; 1163 vf_vlan_info.qos = ivi.qos; 1164 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1165 vf_tx_rate.rate = ivi.max_tx_rate; 1166 vf_rate.min_tx_rate = ivi.min_tx_rate; 1167 vf_rate.max_tx_rate = ivi.max_tx_rate; 1168 vf_spoofchk.setting = ivi.spoofchk; 1169 vf_linkstate.link_state = ivi.linkstate; 1170 vf_rss_query_en.setting = ivi.rss_query_en; 1171 vf_trust.setting = ivi.trusted; 1172 vf = nla_nest_start(skb, IFLA_VF_INFO); 1173 if (!vf) 1174 goto nla_put_vfinfo_failure; 1175 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1176 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1177 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1178 &vf_rate) || 1179 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1180 &vf_tx_rate) || 1181 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1182 &vf_spoofchk) || 1183 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1184 &vf_linkstate) || 1185 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1186 sizeof(vf_rss_query_en), 1187 &vf_rss_query_en) || 1188 nla_put(skb, IFLA_VF_TRUST, 1189 sizeof(vf_trust), &vf_trust)) 1190 goto nla_put_vf_failure; 1191 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST); 1192 if (!vfvlanlist) 1193 goto nla_put_vf_failure; 1194 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1195 &vf_vlan_info)) { 1196 nla_nest_cancel(skb, vfvlanlist); 1197 goto nla_put_vf_failure; 1198 } 1199 nla_nest_end(skb, vfvlanlist); 1200 memset(&vf_stats, 0, sizeof(vf_stats)); 1201 if (dev->netdev_ops->ndo_get_vf_stats) 1202 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1203 &vf_stats); 1204 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1205 if (!vfstats) 1206 goto nla_put_vf_failure; 1207 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1208 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1209 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1210 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1211 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1212 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1214 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1216 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1217 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1218 vf_stats.multicast, IFLA_VF_STATS_PAD)) { 1219 nla_nest_cancel(skb, vfstats); 1220 goto nla_put_vf_failure; 1221 } 1222 nla_nest_end(skb, vfstats); 1223 nla_nest_end(skb, vf); 1224 return 0; 1225 1226 nla_put_vf_failure: 1227 nla_nest_cancel(skb, vf); 1228 nla_put_vfinfo_failure: 1229 nla_nest_cancel(skb, vfinfo); 1230 return -EMSGSIZE; 1231 } 1232 1233 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1234 { 1235 struct rtnl_link_ifmap map; 1236 1237 memset(&map, 0, sizeof(map)); 1238 map.mem_start = dev->mem_start; 1239 map.mem_end = dev->mem_end; 1240 map.base_addr = dev->base_addr; 1241 map.irq = dev->irq; 1242 map.dma = dev->dma; 1243 map.port = dev->if_port; 1244 1245 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1246 return -EMSGSIZE; 1247 1248 return 0; 1249 } 1250 1251 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1252 { 1253 struct netdev_xdp xdp_op = {}; 1254 struct nlattr *xdp; 1255 int err; 1256 1257 if (!dev->netdev_ops->ndo_xdp) 1258 return 0; 1259 xdp = nla_nest_start(skb, IFLA_XDP); 1260 if (!xdp) 1261 return -EMSGSIZE; 1262 xdp_op.command = XDP_QUERY_PROG; 1263 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op); 1264 if (err) 1265 goto err_cancel; 1266 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached); 1267 if (err) 1268 goto err_cancel; 1269 1270 nla_nest_end(skb, xdp); 1271 return 0; 1272 1273 err_cancel: 1274 nla_nest_cancel(skb, xdp); 1275 return err; 1276 } 1277 1278 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1279 int type, u32 pid, u32 seq, u32 change, 1280 unsigned int flags, u32 ext_filter_mask) 1281 { 1282 struct ifinfomsg *ifm; 1283 struct nlmsghdr *nlh; 1284 struct nlattr *af_spec; 1285 struct rtnl_af_ops *af_ops; 1286 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1287 1288 ASSERT_RTNL(); 1289 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1290 if (nlh == NULL) 1291 return -EMSGSIZE; 1292 1293 ifm = nlmsg_data(nlh); 1294 ifm->ifi_family = AF_UNSPEC; 1295 ifm->__ifi_pad = 0; 1296 ifm->ifi_type = dev->type; 1297 ifm->ifi_index = dev->ifindex; 1298 ifm->ifi_flags = dev_get_flags(dev); 1299 ifm->ifi_change = change; 1300 1301 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1302 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1303 nla_put_u8(skb, IFLA_OPERSTATE, 1304 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1305 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1306 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1307 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1308 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1309 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1310 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1311 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1312 #ifdef CONFIG_RPS 1313 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1314 #endif 1315 (dev->ifindex != dev_get_iflink(dev) && 1316 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1317 (upper_dev && 1318 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1319 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1320 (dev->qdisc && 1321 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1322 (dev->ifalias && 1323 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1324 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1325 atomic_read(&dev->carrier_changes)) || 1326 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1327 goto nla_put_failure; 1328 1329 if (rtnl_fill_link_ifmap(skb, dev)) 1330 goto nla_put_failure; 1331 1332 if (dev->addr_len) { 1333 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1334 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1335 goto nla_put_failure; 1336 } 1337 1338 if (rtnl_phys_port_id_fill(skb, dev)) 1339 goto nla_put_failure; 1340 1341 if (rtnl_phys_port_name_fill(skb, dev)) 1342 goto nla_put_failure; 1343 1344 if (rtnl_phys_switch_id_fill(skb, dev)) 1345 goto nla_put_failure; 1346 1347 if (rtnl_fill_stats(skb, dev)) 1348 goto nla_put_failure; 1349 1350 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1351 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1352 goto nla_put_failure; 1353 1354 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1355 ext_filter_mask & RTEXT_FILTER_VF) { 1356 int i; 1357 struct nlattr *vfinfo; 1358 int num_vfs = dev_num_vf(dev->dev.parent); 1359 1360 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1361 if (!vfinfo) 1362 goto nla_put_failure; 1363 for (i = 0; i < num_vfs; i++) { 1364 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1365 goto nla_put_failure; 1366 } 1367 1368 nla_nest_end(skb, vfinfo); 1369 } 1370 1371 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1372 goto nla_put_failure; 1373 1374 if (rtnl_xdp_fill(skb, dev)) 1375 goto nla_put_failure; 1376 1377 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1378 if (rtnl_link_fill(skb, dev) < 0) 1379 goto nla_put_failure; 1380 } 1381 1382 if (dev->rtnl_link_ops && 1383 dev->rtnl_link_ops->get_link_net) { 1384 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1385 1386 if (!net_eq(dev_net(dev), link_net)) { 1387 int id = peernet2id_alloc(dev_net(dev), link_net); 1388 1389 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1390 goto nla_put_failure; 1391 } 1392 } 1393 1394 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1395 goto nla_put_failure; 1396 1397 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1398 if (af_ops->fill_link_af) { 1399 struct nlattr *af; 1400 int err; 1401 1402 if (!(af = nla_nest_start(skb, af_ops->family))) 1403 goto nla_put_failure; 1404 1405 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1406 1407 /* 1408 * Caller may return ENODATA to indicate that there 1409 * was no data to be dumped. This is not an error, it 1410 * means we should trim the attribute header and 1411 * continue. 1412 */ 1413 if (err == -ENODATA) 1414 nla_nest_cancel(skb, af); 1415 else if (err < 0) 1416 goto nla_put_failure; 1417 1418 nla_nest_end(skb, af); 1419 } 1420 } 1421 1422 nla_nest_end(skb, af_spec); 1423 1424 nlmsg_end(skb, nlh); 1425 return 0; 1426 1427 nla_put_failure: 1428 nlmsg_cancel(skb, nlh); 1429 return -EMSGSIZE; 1430 } 1431 1432 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1433 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1434 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1435 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1436 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1437 [IFLA_MTU] = { .type = NLA_U32 }, 1438 [IFLA_LINK] = { .type = NLA_U32 }, 1439 [IFLA_MASTER] = { .type = NLA_U32 }, 1440 [IFLA_CARRIER] = { .type = NLA_U8 }, 1441 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1442 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1443 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1444 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1445 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1446 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1447 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1448 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1449 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1450 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1451 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1452 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1453 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1454 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1455 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1456 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1457 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1458 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1459 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1460 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1461 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1462 [IFLA_XDP] = { .type = NLA_NESTED }, 1463 }; 1464 1465 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1466 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1467 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1468 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1469 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1470 }; 1471 1472 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1473 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1474 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1475 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1476 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1477 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1478 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1479 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1480 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1481 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1482 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1483 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1484 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1485 }; 1486 1487 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1488 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1489 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1490 .len = PORT_PROFILE_MAX }, 1491 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1492 .len = sizeof(struct ifla_port_vsi)}, 1493 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1494 .len = PORT_UUID_MAX }, 1495 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1496 .len = PORT_UUID_MAX }, 1497 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1498 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1499 }; 1500 1501 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1502 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1503 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1504 }; 1505 1506 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1507 { 1508 const struct rtnl_link_ops *ops = NULL; 1509 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1510 1511 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0) 1512 return NULL; 1513 1514 if (linfo[IFLA_INFO_KIND]) { 1515 char kind[MODULE_NAME_LEN]; 1516 1517 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1518 ops = rtnl_link_ops_get(kind); 1519 } 1520 1521 return ops; 1522 } 1523 1524 static bool link_master_filtered(struct net_device *dev, int master_idx) 1525 { 1526 struct net_device *master; 1527 1528 if (!master_idx) 1529 return false; 1530 1531 master = netdev_master_upper_dev_get(dev); 1532 if (!master || master->ifindex != master_idx) 1533 return true; 1534 1535 return false; 1536 } 1537 1538 static bool link_kind_filtered(const struct net_device *dev, 1539 const struct rtnl_link_ops *kind_ops) 1540 { 1541 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1542 return true; 1543 1544 return false; 1545 } 1546 1547 static bool link_dump_filtered(struct net_device *dev, 1548 int master_idx, 1549 const struct rtnl_link_ops *kind_ops) 1550 { 1551 if (link_master_filtered(dev, master_idx) || 1552 link_kind_filtered(dev, kind_ops)) 1553 return true; 1554 1555 return false; 1556 } 1557 1558 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1559 { 1560 struct net *net = sock_net(skb->sk); 1561 int h, s_h; 1562 int idx = 0, s_idx; 1563 struct net_device *dev; 1564 struct hlist_head *head; 1565 struct nlattr *tb[IFLA_MAX+1]; 1566 u32 ext_filter_mask = 0; 1567 const struct rtnl_link_ops *kind_ops = NULL; 1568 unsigned int flags = NLM_F_MULTI; 1569 int master_idx = 0; 1570 int err; 1571 int hdrlen; 1572 1573 s_h = cb->args[0]; 1574 s_idx = cb->args[1]; 1575 1576 cb->seq = net->dev_base_seq; 1577 1578 /* A hack to preserve kernel<->userspace interface. 1579 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1580 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1581 * what iproute2 < v3.9.0 used. 1582 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1583 * attribute, its netlink message is shorter than struct ifinfomsg. 1584 */ 1585 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1586 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1587 1588 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1589 1590 if (tb[IFLA_EXT_MASK]) 1591 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1592 1593 if (tb[IFLA_MASTER]) 1594 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1595 1596 if (tb[IFLA_LINKINFO]) 1597 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1598 1599 if (master_idx || kind_ops) 1600 flags |= NLM_F_DUMP_FILTERED; 1601 } 1602 1603 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1604 idx = 0; 1605 head = &net->dev_index_head[h]; 1606 hlist_for_each_entry(dev, head, index_hlist) { 1607 if (link_dump_filtered(dev, master_idx, kind_ops)) 1608 continue; 1609 if (idx < s_idx) 1610 goto cont; 1611 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1612 NETLINK_CB(cb->skb).portid, 1613 cb->nlh->nlmsg_seq, 0, 1614 flags, 1615 ext_filter_mask); 1616 /* If we ran out of room on the first message, 1617 * we're in trouble 1618 */ 1619 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1620 1621 if (err < 0) 1622 goto out; 1623 1624 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1625 cont: 1626 idx++; 1627 } 1628 } 1629 out: 1630 cb->args[1] = idx; 1631 cb->args[0] = h; 1632 1633 return skb->len; 1634 } 1635 1636 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1637 { 1638 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1639 } 1640 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1641 1642 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1643 { 1644 struct net *net; 1645 /* Examine the link attributes and figure out which 1646 * network namespace we are talking about. 1647 */ 1648 if (tb[IFLA_NET_NS_PID]) 1649 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1650 else if (tb[IFLA_NET_NS_FD]) 1651 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1652 else 1653 net = get_net(src_net); 1654 return net; 1655 } 1656 EXPORT_SYMBOL(rtnl_link_get_net); 1657 1658 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1659 { 1660 if (dev) { 1661 if (tb[IFLA_ADDRESS] && 1662 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1663 return -EINVAL; 1664 1665 if (tb[IFLA_BROADCAST] && 1666 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1667 return -EINVAL; 1668 } 1669 1670 if (tb[IFLA_AF_SPEC]) { 1671 struct nlattr *af; 1672 int rem, err; 1673 1674 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1675 const struct rtnl_af_ops *af_ops; 1676 1677 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1678 return -EAFNOSUPPORT; 1679 1680 if (!af_ops->set_link_af) 1681 return -EOPNOTSUPP; 1682 1683 if (af_ops->validate_link_af) { 1684 err = af_ops->validate_link_af(dev, af); 1685 if (err < 0) 1686 return err; 1687 } 1688 } 1689 } 1690 1691 return 0; 1692 } 1693 1694 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1695 int guid_type) 1696 { 1697 const struct net_device_ops *ops = dev->netdev_ops; 1698 1699 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1700 } 1701 1702 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1703 { 1704 if (dev->type != ARPHRD_INFINIBAND) 1705 return -EOPNOTSUPP; 1706 1707 return handle_infiniband_guid(dev, ivt, guid_type); 1708 } 1709 1710 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1711 { 1712 const struct net_device_ops *ops = dev->netdev_ops; 1713 int err = -EINVAL; 1714 1715 if (tb[IFLA_VF_MAC]) { 1716 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1717 1718 err = -EOPNOTSUPP; 1719 if (ops->ndo_set_vf_mac) 1720 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1721 ivm->mac); 1722 if (err < 0) 1723 return err; 1724 } 1725 1726 if (tb[IFLA_VF_VLAN]) { 1727 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1728 1729 err = -EOPNOTSUPP; 1730 if (ops->ndo_set_vf_vlan) 1731 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1732 ivv->qos, 1733 htons(ETH_P_8021Q)); 1734 if (err < 0) 1735 return err; 1736 } 1737 1738 if (tb[IFLA_VF_VLAN_LIST]) { 1739 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 1740 struct nlattr *attr; 1741 int rem, len = 0; 1742 1743 err = -EOPNOTSUPP; 1744 if (!ops->ndo_set_vf_vlan) 1745 return err; 1746 1747 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 1748 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 1749 nla_len(attr) < NLA_HDRLEN) { 1750 return -EINVAL; 1751 } 1752 if (len >= MAX_VLAN_LIST_LEN) 1753 return -EOPNOTSUPP; 1754 ivvl[len] = nla_data(attr); 1755 1756 len++; 1757 } 1758 if (len == 0) 1759 return -EINVAL; 1760 1761 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 1762 ivvl[0]->qos, ivvl[0]->vlan_proto); 1763 if (err < 0) 1764 return err; 1765 } 1766 1767 if (tb[IFLA_VF_TX_RATE]) { 1768 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1769 struct ifla_vf_info ivf; 1770 1771 err = -EOPNOTSUPP; 1772 if (ops->ndo_get_vf_config) 1773 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1774 if (err < 0) 1775 return err; 1776 1777 err = -EOPNOTSUPP; 1778 if (ops->ndo_set_vf_rate) 1779 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1780 ivf.min_tx_rate, 1781 ivt->rate); 1782 if (err < 0) 1783 return err; 1784 } 1785 1786 if (tb[IFLA_VF_RATE]) { 1787 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1788 1789 err = -EOPNOTSUPP; 1790 if (ops->ndo_set_vf_rate) 1791 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1792 ivt->min_tx_rate, 1793 ivt->max_tx_rate); 1794 if (err < 0) 1795 return err; 1796 } 1797 1798 if (tb[IFLA_VF_SPOOFCHK]) { 1799 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1800 1801 err = -EOPNOTSUPP; 1802 if (ops->ndo_set_vf_spoofchk) 1803 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1804 ivs->setting); 1805 if (err < 0) 1806 return err; 1807 } 1808 1809 if (tb[IFLA_VF_LINK_STATE]) { 1810 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1811 1812 err = -EOPNOTSUPP; 1813 if (ops->ndo_set_vf_link_state) 1814 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1815 ivl->link_state); 1816 if (err < 0) 1817 return err; 1818 } 1819 1820 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1821 struct ifla_vf_rss_query_en *ivrssq_en; 1822 1823 err = -EOPNOTSUPP; 1824 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1825 if (ops->ndo_set_vf_rss_query_en) 1826 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1827 ivrssq_en->setting); 1828 if (err < 0) 1829 return err; 1830 } 1831 1832 if (tb[IFLA_VF_TRUST]) { 1833 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1834 1835 err = -EOPNOTSUPP; 1836 if (ops->ndo_set_vf_trust) 1837 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1838 if (err < 0) 1839 return err; 1840 } 1841 1842 if (tb[IFLA_VF_IB_NODE_GUID]) { 1843 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1844 1845 if (!ops->ndo_set_vf_guid) 1846 return -EOPNOTSUPP; 1847 1848 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1849 } 1850 1851 if (tb[IFLA_VF_IB_PORT_GUID]) { 1852 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1853 1854 if (!ops->ndo_set_vf_guid) 1855 return -EOPNOTSUPP; 1856 1857 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1858 } 1859 1860 return err; 1861 } 1862 1863 static int do_set_master(struct net_device *dev, int ifindex) 1864 { 1865 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1866 const struct net_device_ops *ops; 1867 int err; 1868 1869 if (upper_dev) { 1870 if (upper_dev->ifindex == ifindex) 1871 return 0; 1872 ops = upper_dev->netdev_ops; 1873 if (ops->ndo_del_slave) { 1874 err = ops->ndo_del_slave(upper_dev, dev); 1875 if (err) 1876 return err; 1877 } else { 1878 return -EOPNOTSUPP; 1879 } 1880 } 1881 1882 if (ifindex) { 1883 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1884 if (!upper_dev) 1885 return -EINVAL; 1886 ops = upper_dev->netdev_ops; 1887 if (ops->ndo_add_slave) { 1888 err = ops->ndo_add_slave(upper_dev, dev); 1889 if (err) 1890 return err; 1891 } else { 1892 return -EOPNOTSUPP; 1893 } 1894 } 1895 return 0; 1896 } 1897 1898 #define DO_SETLINK_MODIFIED 0x01 1899 /* notify flag means notify + modified. */ 1900 #define DO_SETLINK_NOTIFY 0x03 1901 static int do_setlink(const struct sk_buff *skb, 1902 struct net_device *dev, struct ifinfomsg *ifm, 1903 struct nlattr **tb, char *ifname, int status) 1904 { 1905 const struct net_device_ops *ops = dev->netdev_ops; 1906 int err; 1907 1908 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1909 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1910 if (IS_ERR(net)) { 1911 err = PTR_ERR(net); 1912 goto errout; 1913 } 1914 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1915 put_net(net); 1916 err = -EPERM; 1917 goto errout; 1918 } 1919 err = dev_change_net_namespace(dev, net, ifname); 1920 put_net(net); 1921 if (err) 1922 goto errout; 1923 status |= DO_SETLINK_MODIFIED; 1924 } 1925 1926 if (tb[IFLA_MAP]) { 1927 struct rtnl_link_ifmap *u_map; 1928 struct ifmap k_map; 1929 1930 if (!ops->ndo_set_config) { 1931 err = -EOPNOTSUPP; 1932 goto errout; 1933 } 1934 1935 if (!netif_device_present(dev)) { 1936 err = -ENODEV; 1937 goto errout; 1938 } 1939 1940 u_map = nla_data(tb[IFLA_MAP]); 1941 k_map.mem_start = (unsigned long) u_map->mem_start; 1942 k_map.mem_end = (unsigned long) u_map->mem_end; 1943 k_map.base_addr = (unsigned short) u_map->base_addr; 1944 k_map.irq = (unsigned char) u_map->irq; 1945 k_map.dma = (unsigned char) u_map->dma; 1946 k_map.port = (unsigned char) u_map->port; 1947 1948 err = ops->ndo_set_config(dev, &k_map); 1949 if (err < 0) 1950 goto errout; 1951 1952 status |= DO_SETLINK_NOTIFY; 1953 } 1954 1955 if (tb[IFLA_ADDRESS]) { 1956 struct sockaddr *sa; 1957 int len; 1958 1959 len = sizeof(sa_family_t) + dev->addr_len; 1960 sa = kmalloc(len, GFP_KERNEL); 1961 if (!sa) { 1962 err = -ENOMEM; 1963 goto errout; 1964 } 1965 sa->sa_family = dev->type; 1966 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1967 dev->addr_len); 1968 err = dev_set_mac_address(dev, sa); 1969 kfree(sa); 1970 if (err) 1971 goto errout; 1972 status |= DO_SETLINK_MODIFIED; 1973 } 1974 1975 if (tb[IFLA_MTU]) { 1976 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1977 if (err < 0) 1978 goto errout; 1979 status |= DO_SETLINK_MODIFIED; 1980 } 1981 1982 if (tb[IFLA_GROUP]) { 1983 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1984 status |= DO_SETLINK_NOTIFY; 1985 } 1986 1987 /* 1988 * Interface selected by interface index but interface 1989 * name provided implies that a name change has been 1990 * requested. 1991 */ 1992 if (ifm->ifi_index > 0 && ifname[0]) { 1993 err = dev_change_name(dev, ifname); 1994 if (err < 0) 1995 goto errout; 1996 status |= DO_SETLINK_MODIFIED; 1997 } 1998 1999 if (tb[IFLA_IFALIAS]) { 2000 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2001 nla_len(tb[IFLA_IFALIAS])); 2002 if (err < 0) 2003 goto errout; 2004 status |= DO_SETLINK_NOTIFY; 2005 } 2006 2007 if (tb[IFLA_BROADCAST]) { 2008 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2009 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2010 } 2011 2012 if (ifm->ifi_flags || ifm->ifi_change) { 2013 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2014 if (err < 0) 2015 goto errout; 2016 } 2017 2018 if (tb[IFLA_MASTER]) { 2019 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2020 if (err) 2021 goto errout; 2022 status |= DO_SETLINK_MODIFIED; 2023 } 2024 2025 if (tb[IFLA_CARRIER]) { 2026 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2027 if (err) 2028 goto errout; 2029 status |= DO_SETLINK_MODIFIED; 2030 } 2031 2032 if (tb[IFLA_TXQLEN]) { 2033 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 2034 unsigned long orig_len = dev->tx_queue_len; 2035 2036 if (dev->tx_queue_len ^ value) { 2037 dev->tx_queue_len = value; 2038 err = call_netdevice_notifiers( 2039 NETDEV_CHANGE_TX_QUEUE_LEN, dev); 2040 err = notifier_to_errno(err); 2041 if (err) { 2042 dev->tx_queue_len = orig_len; 2043 goto errout; 2044 } 2045 status |= DO_SETLINK_NOTIFY; 2046 } 2047 } 2048 2049 if (tb[IFLA_OPERSTATE]) 2050 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2051 2052 if (tb[IFLA_LINKMODE]) { 2053 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2054 2055 write_lock_bh(&dev_base_lock); 2056 if (dev->link_mode ^ value) 2057 status |= DO_SETLINK_NOTIFY; 2058 dev->link_mode = value; 2059 write_unlock_bh(&dev_base_lock); 2060 } 2061 2062 if (tb[IFLA_VFINFO_LIST]) { 2063 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2064 struct nlattr *attr; 2065 int rem; 2066 2067 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2068 if (nla_type(attr) != IFLA_VF_INFO || 2069 nla_len(attr) < NLA_HDRLEN) { 2070 err = -EINVAL; 2071 goto errout; 2072 } 2073 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 2074 ifla_vf_policy); 2075 if (err < 0) 2076 goto errout; 2077 err = do_setvfinfo(dev, vfinfo); 2078 if (err < 0) 2079 goto errout; 2080 status |= DO_SETLINK_NOTIFY; 2081 } 2082 } 2083 err = 0; 2084 2085 if (tb[IFLA_VF_PORTS]) { 2086 struct nlattr *port[IFLA_PORT_MAX+1]; 2087 struct nlattr *attr; 2088 int vf; 2089 int rem; 2090 2091 err = -EOPNOTSUPP; 2092 if (!ops->ndo_set_vf_port) 2093 goto errout; 2094 2095 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2096 if (nla_type(attr) != IFLA_VF_PORT || 2097 nla_len(attr) < NLA_HDRLEN) { 2098 err = -EINVAL; 2099 goto errout; 2100 } 2101 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 2102 ifla_port_policy); 2103 if (err < 0) 2104 goto errout; 2105 if (!port[IFLA_PORT_VF]) { 2106 err = -EOPNOTSUPP; 2107 goto errout; 2108 } 2109 vf = nla_get_u32(port[IFLA_PORT_VF]); 2110 err = ops->ndo_set_vf_port(dev, vf, port); 2111 if (err < 0) 2112 goto errout; 2113 status |= DO_SETLINK_NOTIFY; 2114 } 2115 } 2116 err = 0; 2117 2118 if (tb[IFLA_PORT_SELF]) { 2119 struct nlattr *port[IFLA_PORT_MAX+1]; 2120 2121 err = nla_parse_nested(port, IFLA_PORT_MAX, 2122 tb[IFLA_PORT_SELF], ifla_port_policy); 2123 if (err < 0) 2124 goto errout; 2125 2126 err = -EOPNOTSUPP; 2127 if (ops->ndo_set_vf_port) 2128 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2129 if (err < 0) 2130 goto errout; 2131 status |= DO_SETLINK_NOTIFY; 2132 } 2133 2134 if (tb[IFLA_AF_SPEC]) { 2135 struct nlattr *af; 2136 int rem; 2137 2138 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2139 const struct rtnl_af_ops *af_ops; 2140 2141 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2142 BUG(); 2143 2144 err = af_ops->set_link_af(dev, af); 2145 if (err < 0) 2146 goto errout; 2147 2148 status |= DO_SETLINK_NOTIFY; 2149 } 2150 } 2151 err = 0; 2152 2153 if (tb[IFLA_PROTO_DOWN]) { 2154 err = dev_change_proto_down(dev, 2155 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2156 if (err) 2157 goto errout; 2158 status |= DO_SETLINK_NOTIFY; 2159 } 2160 2161 if (tb[IFLA_XDP]) { 2162 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2163 2164 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2165 ifla_xdp_policy); 2166 if (err < 0) 2167 goto errout; 2168 2169 if (xdp[IFLA_XDP_ATTACHED]) { 2170 err = -EINVAL; 2171 goto errout; 2172 } 2173 if (xdp[IFLA_XDP_FD]) { 2174 err = dev_change_xdp_fd(dev, 2175 nla_get_s32(xdp[IFLA_XDP_FD])); 2176 if (err) 2177 goto errout; 2178 status |= DO_SETLINK_NOTIFY; 2179 } 2180 } 2181 2182 errout: 2183 if (status & DO_SETLINK_MODIFIED) { 2184 if (status & DO_SETLINK_NOTIFY) 2185 netdev_state_change(dev); 2186 2187 if (err < 0) 2188 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", 2189 dev->name); 2190 } 2191 2192 return err; 2193 } 2194 2195 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2196 { 2197 struct net *net = sock_net(skb->sk); 2198 struct ifinfomsg *ifm; 2199 struct net_device *dev; 2200 int err; 2201 struct nlattr *tb[IFLA_MAX+1]; 2202 char ifname[IFNAMSIZ]; 2203 2204 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2205 if (err < 0) 2206 goto errout; 2207 2208 if (tb[IFLA_IFNAME]) 2209 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2210 else 2211 ifname[0] = '\0'; 2212 2213 err = -EINVAL; 2214 ifm = nlmsg_data(nlh); 2215 if (ifm->ifi_index > 0) 2216 dev = __dev_get_by_index(net, ifm->ifi_index); 2217 else if (tb[IFLA_IFNAME]) 2218 dev = __dev_get_by_name(net, ifname); 2219 else 2220 goto errout; 2221 2222 if (dev == NULL) { 2223 err = -ENODEV; 2224 goto errout; 2225 } 2226 2227 err = validate_linkmsg(dev, tb); 2228 if (err < 0) 2229 goto errout; 2230 2231 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 2232 errout: 2233 return err; 2234 } 2235 2236 static int rtnl_group_dellink(const struct net *net, int group) 2237 { 2238 struct net_device *dev, *aux; 2239 LIST_HEAD(list_kill); 2240 bool found = false; 2241 2242 if (!group) 2243 return -EPERM; 2244 2245 for_each_netdev(net, dev) { 2246 if (dev->group == group) { 2247 const struct rtnl_link_ops *ops; 2248 2249 found = true; 2250 ops = dev->rtnl_link_ops; 2251 if (!ops || !ops->dellink) 2252 return -EOPNOTSUPP; 2253 } 2254 } 2255 2256 if (!found) 2257 return -ENODEV; 2258 2259 for_each_netdev_safe(net, dev, aux) { 2260 if (dev->group == group) { 2261 const struct rtnl_link_ops *ops; 2262 2263 ops = dev->rtnl_link_ops; 2264 ops->dellink(dev, &list_kill); 2265 } 2266 } 2267 unregister_netdevice_many(&list_kill); 2268 2269 return 0; 2270 } 2271 2272 int rtnl_delete_link(struct net_device *dev) 2273 { 2274 const struct rtnl_link_ops *ops; 2275 LIST_HEAD(list_kill); 2276 2277 ops = dev->rtnl_link_ops; 2278 if (!ops || !ops->dellink) 2279 return -EOPNOTSUPP; 2280 2281 ops->dellink(dev, &list_kill); 2282 unregister_netdevice_many(&list_kill); 2283 2284 return 0; 2285 } 2286 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2287 2288 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2289 { 2290 struct net *net = sock_net(skb->sk); 2291 struct net_device *dev; 2292 struct ifinfomsg *ifm; 2293 char ifname[IFNAMSIZ]; 2294 struct nlattr *tb[IFLA_MAX+1]; 2295 int err; 2296 2297 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2298 if (err < 0) 2299 return err; 2300 2301 if (tb[IFLA_IFNAME]) 2302 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2303 2304 ifm = nlmsg_data(nlh); 2305 if (ifm->ifi_index > 0) 2306 dev = __dev_get_by_index(net, ifm->ifi_index); 2307 else if (tb[IFLA_IFNAME]) 2308 dev = __dev_get_by_name(net, ifname); 2309 else if (tb[IFLA_GROUP]) 2310 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2311 else 2312 return -EINVAL; 2313 2314 if (!dev) 2315 return -ENODEV; 2316 2317 return rtnl_delete_link(dev); 2318 } 2319 2320 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2321 { 2322 unsigned int old_flags; 2323 int err; 2324 2325 old_flags = dev->flags; 2326 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2327 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2328 if (err < 0) 2329 return err; 2330 } 2331 2332 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2333 2334 __dev_notify_flags(dev, old_flags, ~0U); 2335 return 0; 2336 } 2337 EXPORT_SYMBOL(rtnl_configure_link); 2338 2339 struct net_device *rtnl_create_link(struct net *net, 2340 const char *ifname, unsigned char name_assign_type, 2341 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2342 { 2343 int err; 2344 struct net_device *dev; 2345 unsigned int num_tx_queues = 1; 2346 unsigned int num_rx_queues = 1; 2347 2348 if (tb[IFLA_NUM_TX_QUEUES]) 2349 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2350 else if (ops->get_num_tx_queues) 2351 num_tx_queues = ops->get_num_tx_queues(); 2352 2353 if (tb[IFLA_NUM_RX_QUEUES]) 2354 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2355 else if (ops->get_num_rx_queues) 2356 num_rx_queues = ops->get_num_rx_queues(); 2357 2358 err = -ENOMEM; 2359 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2360 ops->setup, num_tx_queues, num_rx_queues); 2361 if (!dev) 2362 goto err; 2363 2364 dev_net_set(dev, net); 2365 dev->rtnl_link_ops = ops; 2366 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2367 2368 if (tb[IFLA_MTU]) 2369 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2370 if (tb[IFLA_ADDRESS]) { 2371 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2372 nla_len(tb[IFLA_ADDRESS])); 2373 dev->addr_assign_type = NET_ADDR_SET; 2374 } 2375 if (tb[IFLA_BROADCAST]) 2376 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2377 nla_len(tb[IFLA_BROADCAST])); 2378 if (tb[IFLA_TXQLEN]) 2379 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2380 if (tb[IFLA_OPERSTATE]) 2381 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2382 if (tb[IFLA_LINKMODE]) 2383 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2384 if (tb[IFLA_GROUP]) 2385 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2386 2387 return dev; 2388 2389 err: 2390 return ERR_PTR(err); 2391 } 2392 EXPORT_SYMBOL(rtnl_create_link); 2393 2394 static int rtnl_group_changelink(const struct sk_buff *skb, 2395 struct net *net, int group, 2396 struct ifinfomsg *ifm, 2397 struct nlattr **tb) 2398 { 2399 struct net_device *dev, *aux; 2400 int err; 2401 2402 for_each_netdev_safe(net, dev, aux) { 2403 if (dev->group == group) { 2404 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2405 if (err < 0) 2406 return err; 2407 } 2408 } 2409 2410 return 0; 2411 } 2412 2413 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2414 { 2415 struct net *net = sock_net(skb->sk); 2416 const struct rtnl_link_ops *ops; 2417 const struct rtnl_link_ops *m_ops = NULL; 2418 struct net_device *dev; 2419 struct net_device *master_dev = NULL; 2420 struct ifinfomsg *ifm; 2421 char kind[MODULE_NAME_LEN]; 2422 char ifname[IFNAMSIZ]; 2423 struct nlattr *tb[IFLA_MAX+1]; 2424 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2425 unsigned char name_assign_type = NET_NAME_USER; 2426 int err; 2427 2428 #ifdef CONFIG_MODULES 2429 replay: 2430 #endif 2431 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2432 if (err < 0) 2433 return err; 2434 2435 if (tb[IFLA_IFNAME]) 2436 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2437 else 2438 ifname[0] = '\0'; 2439 2440 ifm = nlmsg_data(nlh); 2441 if (ifm->ifi_index > 0) 2442 dev = __dev_get_by_index(net, ifm->ifi_index); 2443 else { 2444 if (ifname[0]) 2445 dev = __dev_get_by_name(net, ifname); 2446 else 2447 dev = NULL; 2448 } 2449 2450 if (dev) { 2451 master_dev = netdev_master_upper_dev_get(dev); 2452 if (master_dev) 2453 m_ops = master_dev->rtnl_link_ops; 2454 } 2455 2456 err = validate_linkmsg(dev, tb); 2457 if (err < 0) 2458 return err; 2459 2460 if (tb[IFLA_LINKINFO]) { 2461 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2462 tb[IFLA_LINKINFO], ifla_info_policy); 2463 if (err < 0) 2464 return err; 2465 } else 2466 memset(linkinfo, 0, sizeof(linkinfo)); 2467 2468 if (linkinfo[IFLA_INFO_KIND]) { 2469 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2470 ops = rtnl_link_ops_get(kind); 2471 } else { 2472 kind[0] = '\0'; 2473 ops = NULL; 2474 } 2475 2476 if (1) { 2477 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2478 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2479 struct nlattr **data = NULL; 2480 struct nlattr **slave_data = NULL; 2481 struct net *dest_net, *link_net = NULL; 2482 2483 if (ops) { 2484 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2485 err = nla_parse_nested(attr, ops->maxtype, 2486 linkinfo[IFLA_INFO_DATA], 2487 ops->policy); 2488 if (err < 0) 2489 return err; 2490 data = attr; 2491 } 2492 if (ops->validate) { 2493 err = ops->validate(tb, data); 2494 if (err < 0) 2495 return err; 2496 } 2497 } 2498 2499 if (m_ops) { 2500 if (m_ops->slave_maxtype && 2501 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2502 err = nla_parse_nested(slave_attr, 2503 m_ops->slave_maxtype, 2504 linkinfo[IFLA_INFO_SLAVE_DATA], 2505 m_ops->slave_policy); 2506 if (err < 0) 2507 return err; 2508 slave_data = slave_attr; 2509 } 2510 if (m_ops->slave_validate) { 2511 err = m_ops->slave_validate(tb, slave_data); 2512 if (err < 0) 2513 return err; 2514 } 2515 } 2516 2517 if (dev) { 2518 int status = 0; 2519 2520 if (nlh->nlmsg_flags & NLM_F_EXCL) 2521 return -EEXIST; 2522 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2523 return -EOPNOTSUPP; 2524 2525 if (linkinfo[IFLA_INFO_DATA]) { 2526 if (!ops || ops != dev->rtnl_link_ops || 2527 !ops->changelink) 2528 return -EOPNOTSUPP; 2529 2530 err = ops->changelink(dev, tb, data); 2531 if (err < 0) 2532 return err; 2533 status |= DO_SETLINK_NOTIFY; 2534 } 2535 2536 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2537 if (!m_ops || !m_ops->slave_changelink) 2538 return -EOPNOTSUPP; 2539 2540 err = m_ops->slave_changelink(master_dev, dev, 2541 tb, slave_data); 2542 if (err < 0) 2543 return err; 2544 status |= DO_SETLINK_NOTIFY; 2545 } 2546 2547 return do_setlink(skb, dev, ifm, tb, ifname, status); 2548 } 2549 2550 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2551 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2552 return rtnl_group_changelink(skb, net, 2553 nla_get_u32(tb[IFLA_GROUP]), 2554 ifm, tb); 2555 return -ENODEV; 2556 } 2557 2558 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2559 return -EOPNOTSUPP; 2560 2561 if (!ops) { 2562 #ifdef CONFIG_MODULES 2563 if (kind[0]) { 2564 __rtnl_unlock(); 2565 request_module("rtnl-link-%s", kind); 2566 rtnl_lock(); 2567 ops = rtnl_link_ops_get(kind); 2568 if (ops) 2569 goto replay; 2570 } 2571 #endif 2572 return -EOPNOTSUPP; 2573 } 2574 2575 if (!ops->setup) 2576 return -EOPNOTSUPP; 2577 2578 if (!ifname[0]) { 2579 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2580 name_assign_type = NET_NAME_ENUM; 2581 } 2582 2583 dest_net = rtnl_link_get_net(net, tb); 2584 if (IS_ERR(dest_net)) 2585 return PTR_ERR(dest_net); 2586 2587 err = -EPERM; 2588 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2589 goto out; 2590 2591 if (tb[IFLA_LINK_NETNSID]) { 2592 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2593 2594 link_net = get_net_ns_by_id(dest_net, id); 2595 if (!link_net) { 2596 err = -EINVAL; 2597 goto out; 2598 } 2599 err = -EPERM; 2600 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2601 goto out; 2602 } 2603 2604 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2605 name_assign_type, ops, tb); 2606 if (IS_ERR(dev)) { 2607 err = PTR_ERR(dev); 2608 goto out; 2609 } 2610 2611 dev->ifindex = ifm->ifi_index; 2612 2613 if (ops->newlink) { 2614 err = ops->newlink(link_net ? : net, dev, tb, data); 2615 /* Drivers should call free_netdev() in ->destructor 2616 * and unregister it on failure after registration 2617 * so that device could be finally freed in rtnl_unlock. 2618 */ 2619 if (err < 0) { 2620 /* If device is not registered at all, free it now */ 2621 if (dev->reg_state == NETREG_UNINITIALIZED) 2622 free_netdev(dev); 2623 goto out; 2624 } 2625 } else { 2626 err = register_netdevice(dev); 2627 if (err < 0) { 2628 free_netdev(dev); 2629 goto out; 2630 } 2631 } 2632 err = rtnl_configure_link(dev, ifm); 2633 if (err < 0) 2634 goto out_unregister; 2635 if (link_net) { 2636 err = dev_change_net_namespace(dev, dest_net, ifname); 2637 if (err < 0) 2638 goto out_unregister; 2639 } 2640 out: 2641 if (link_net) 2642 put_net(link_net); 2643 put_net(dest_net); 2644 return err; 2645 out_unregister: 2646 if (ops->newlink) { 2647 LIST_HEAD(list_kill); 2648 2649 ops->dellink(dev, &list_kill); 2650 unregister_netdevice_many(&list_kill); 2651 } else { 2652 unregister_netdevice(dev); 2653 } 2654 goto out; 2655 } 2656 } 2657 2658 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2659 { 2660 struct net *net = sock_net(skb->sk); 2661 struct ifinfomsg *ifm; 2662 char ifname[IFNAMSIZ]; 2663 struct nlattr *tb[IFLA_MAX+1]; 2664 struct net_device *dev = NULL; 2665 struct sk_buff *nskb; 2666 int err; 2667 u32 ext_filter_mask = 0; 2668 2669 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2670 if (err < 0) 2671 return err; 2672 2673 if (tb[IFLA_IFNAME]) 2674 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2675 2676 if (tb[IFLA_EXT_MASK]) 2677 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2678 2679 ifm = nlmsg_data(nlh); 2680 if (ifm->ifi_index > 0) 2681 dev = __dev_get_by_index(net, ifm->ifi_index); 2682 else if (tb[IFLA_IFNAME]) 2683 dev = __dev_get_by_name(net, ifname); 2684 else 2685 return -EINVAL; 2686 2687 if (dev == NULL) 2688 return -ENODEV; 2689 2690 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2691 if (nskb == NULL) 2692 return -ENOBUFS; 2693 2694 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2695 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2696 if (err < 0) { 2697 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2698 WARN_ON(err == -EMSGSIZE); 2699 kfree_skb(nskb); 2700 } else 2701 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2702 2703 return err; 2704 } 2705 2706 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2707 { 2708 struct net *net = sock_net(skb->sk); 2709 struct net_device *dev; 2710 struct nlattr *tb[IFLA_MAX+1]; 2711 u32 ext_filter_mask = 0; 2712 u16 min_ifinfo_dump_size = 0; 2713 int hdrlen; 2714 2715 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2716 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2717 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2718 2719 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2720 if (tb[IFLA_EXT_MASK]) 2721 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2722 } 2723 2724 if (!ext_filter_mask) 2725 return NLMSG_GOODSIZE; 2726 /* 2727 * traverse the list of net devices and compute the minimum 2728 * buffer size based upon the filter mask. 2729 */ 2730 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2731 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2732 if_nlmsg_size(dev, 2733 ext_filter_mask)); 2734 } 2735 2736 return min_ifinfo_dump_size; 2737 } 2738 2739 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2740 { 2741 int idx; 2742 int s_idx = cb->family; 2743 2744 if (s_idx == 0) 2745 s_idx = 1; 2746 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2747 int type = cb->nlh->nlmsg_type-RTM_BASE; 2748 if (idx < s_idx || idx == PF_PACKET) 2749 continue; 2750 if (rtnl_msg_handlers[idx] == NULL || 2751 rtnl_msg_handlers[idx][type].dumpit == NULL) 2752 continue; 2753 if (idx > s_idx) { 2754 memset(&cb->args[0], 0, sizeof(cb->args)); 2755 cb->prev_seq = 0; 2756 cb->seq = 0; 2757 } 2758 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2759 break; 2760 } 2761 cb->family = idx; 2762 2763 return skb->len; 2764 } 2765 2766 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2767 unsigned int change, gfp_t flags) 2768 { 2769 struct net *net = dev_net(dev); 2770 struct sk_buff *skb; 2771 int err = -ENOBUFS; 2772 size_t if_info_size; 2773 2774 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2775 if (skb == NULL) 2776 goto errout; 2777 2778 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2779 if (err < 0) { 2780 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2781 WARN_ON(err == -EMSGSIZE); 2782 kfree_skb(skb); 2783 goto errout; 2784 } 2785 return skb; 2786 errout: 2787 if (err < 0) 2788 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2789 return NULL; 2790 } 2791 2792 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2793 { 2794 struct net *net = dev_net(dev); 2795 2796 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2797 } 2798 2799 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2800 gfp_t flags) 2801 { 2802 struct sk_buff *skb; 2803 2804 if (dev->reg_state != NETREG_REGISTERED) 2805 return; 2806 2807 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2808 if (skb) 2809 rtmsg_ifinfo_send(skb, dev, flags); 2810 } 2811 EXPORT_SYMBOL(rtmsg_ifinfo); 2812 2813 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2814 struct net_device *dev, 2815 u8 *addr, u16 vid, u32 pid, u32 seq, 2816 int type, unsigned int flags, 2817 int nlflags, u16 ndm_state) 2818 { 2819 struct nlmsghdr *nlh; 2820 struct ndmsg *ndm; 2821 2822 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2823 if (!nlh) 2824 return -EMSGSIZE; 2825 2826 ndm = nlmsg_data(nlh); 2827 ndm->ndm_family = AF_BRIDGE; 2828 ndm->ndm_pad1 = 0; 2829 ndm->ndm_pad2 = 0; 2830 ndm->ndm_flags = flags; 2831 ndm->ndm_type = 0; 2832 ndm->ndm_ifindex = dev->ifindex; 2833 ndm->ndm_state = ndm_state; 2834 2835 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2836 goto nla_put_failure; 2837 if (vid) 2838 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2839 goto nla_put_failure; 2840 2841 nlmsg_end(skb, nlh); 2842 return 0; 2843 2844 nla_put_failure: 2845 nlmsg_cancel(skb, nlh); 2846 return -EMSGSIZE; 2847 } 2848 2849 static inline size_t rtnl_fdb_nlmsg_size(void) 2850 { 2851 return NLMSG_ALIGN(sizeof(struct ndmsg)) + nla_total_size(ETH_ALEN); 2852 } 2853 2854 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2855 u16 ndm_state) 2856 { 2857 struct net *net = dev_net(dev); 2858 struct sk_buff *skb; 2859 int err = -ENOBUFS; 2860 2861 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2862 if (!skb) 2863 goto errout; 2864 2865 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2866 0, 0, type, NTF_SELF, 0, ndm_state); 2867 if (err < 0) { 2868 kfree_skb(skb); 2869 goto errout; 2870 } 2871 2872 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2873 return; 2874 errout: 2875 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2876 } 2877 2878 /** 2879 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2880 */ 2881 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2882 struct nlattr *tb[], 2883 struct net_device *dev, 2884 const unsigned char *addr, u16 vid, 2885 u16 flags) 2886 { 2887 int err = -EINVAL; 2888 2889 /* If aging addresses are supported device will need to 2890 * implement its own handler for this. 2891 */ 2892 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2893 pr_info("%s: FDB only supports static addresses\n", dev->name); 2894 return err; 2895 } 2896 2897 if (vid) { 2898 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2899 return err; 2900 } 2901 2902 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2903 err = dev_uc_add_excl(dev, addr); 2904 else if (is_multicast_ether_addr(addr)) 2905 err = dev_mc_add_excl(dev, addr); 2906 2907 /* Only return duplicate errors if NLM_F_EXCL is set */ 2908 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2909 err = 0; 2910 2911 return err; 2912 } 2913 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2914 2915 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2916 { 2917 u16 vid = 0; 2918 2919 if (vlan_attr) { 2920 if (nla_len(vlan_attr) != sizeof(u16)) { 2921 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2922 return -EINVAL; 2923 } 2924 2925 vid = nla_get_u16(vlan_attr); 2926 2927 if (!vid || vid >= VLAN_VID_MASK) { 2928 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2929 vid); 2930 return -EINVAL; 2931 } 2932 } 2933 *p_vid = vid; 2934 return 0; 2935 } 2936 2937 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2938 { 2939 struct net *net = sock_net(skb->sk); 2940 struct ndmsg *ndm; 2941 struct nlattr *tb[NDA_MAX+1]; 2942 struct net_device *dev; 2943 u8 *addr; 2944 u16 vid; 2945 int err; 2946 2947 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2948 if (err < 0) 2949 return err; 2950 2951 ndm = nlmsg_data(nlh); 2952 if (ndm->ndm_ifindex == 0) { 2953 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2954 return -EINVAL; 2955 } 2956 2957 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2958 if (dev == NULL) { 2959 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2960 return -ENODEV; 2961 } 2962 2963 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2964 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2965 return -EINVAL; 2966 } 2967 2968 addr = nla_data(tb[NDA_LLADDR]); 2969 2970 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2971 if (err) 2972 return err; 2973 2974 err = -EOPNOTSUPP; 2975 2976 /* Support fdb on master device the net/bridge default case */ 2977 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2978 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2979 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2980 const struct net_device_ops *ops = br_dev->netdev_ops; 2981 2982 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2983 nlh->nlmsg_flags); 2984 if (err) 2985 goto out; 2986 else 2987 ndm->ndm_flags &= ~NTF_MASTER; 2988 } 2989 2990 /* Embedded bridge, macvlan, and any other device support */ 2991 if ((ndm->ndm_flags & NTF_SELF)) { 2992 if (dev->netdev_ops->ndo_fdb_add) 2993 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 2994 vid, 2995 nlh->nlmsg_flags); 2996 else 2997 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 2998 nlh->nlmsg_flags); 2999 3000 if (!err) { 3001 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3002 ndm->ndm_state); 3003 ndm->ndm_flags &= ~NTF_SELF; 3004 } 3005 } 3006 out: 3007 return err; 3008 } 3009 3010 /** 3011 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3012 */ 3013 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3014 struct nlattr *tb[], 3015 struct net_device *dev, 3016 const unsigned char *addr, u16 vid) 3017 { 3018 int err = -EINVAL; 3019 3020 /* If aging addresses are supported device will need to 3021 * implement its own handler for this. 3022 */ 3023 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3024 pr_info("%s: FDB only supports static addresses\n", dev->name); 3025 return err; 3026 } 3027 3028 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3029 err = dev_uc_del(dev, addr); 3030 else if (is_multicast_ether_addr(addr)) 3031 err = dev_mc_del(dev, addr); 3032 3033 return err; 3034 } 3035 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3036 3037 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 3038 { 3039 struct net *net = sock_net(skb->sk); 3040 struct ndmsg *ndm; 3041 struct nlattr *tb[NDA_MAX+1]; 3042 struct net_device *dev; 3043 int err = -EINVAL; 3044 __u8 *addr; 3045 u16 vid; 3046 3047 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3048 return -EPERM; 3049 3050 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 3051 if (err < 0) 3052 return err; 3053 3054 ndm = nlmsg_data(nlh); 3055 if (ndm->ndm_ifindex == 0) { 3056 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 3057 return -EINVAL; 3058 } 3059 3060 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3061 if (dev == NULL) { 3062 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 3063 return -ENODEV; 3064 } 3065 3066 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3067 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 3068 return -EINVAL; 3069 } 3070 3071 addr = nla_data(tb[NDA_LLADDR]); 3072 3073 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 3074 if (err) 3075 return err; 3076 3077 err = -EOPNOTSUPP; 3078 3079 /* Support fdb on master device the net/bridge default case */ 3080 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3081 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3082 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3083 const struct net_device_ops *ops = br_dev->netdev_ops; 3084 3085 if (ops->ndo_fdb_del) 3086 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3087 3088 if (err) 3089 goto out; 3090 else 3091 ndm->ndm_flags &= ~NTF_MASTER; 3092 } 3093 3094 /* Embedded bridge, macvlan, and any other device support */ 3095 if (ndm->ndm_flags & NTF_SELF) { 3096 if (dev->netdev_ops->ndo_fdb_del) 3097 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3098 vid); 3099 else 3100 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3101 3102 if (!err) { 3103 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3104 ndm->ndm_state); 3105 ndm->ndm_flags &= ~NTF_SELF; 3106 } 3107 } 3108 out: 3109 return err; 3110 } 3111 3112 static int nlmsg_populate_fdb(struct sk_buff *skb, 3113 struct netlink_callback *cb, 3114 struct net_device *dev, 3115 int *idx, 3116 struct netdev_hw_addr_list *list) 3117 { 3118 struct netdev_hw_addr *ha; 3119 int err; 3120 u32 portid, seq; 3121 3122 portid = NETLINK_CB(cb->skb).portid; 3123 seq = cb->nlh->nlmsg_seq; 3124 3125 list_for_each_entry(ha, &list->list, list) { 3126 if (*idx < cb->args[2]) 3127 goto skip; 3128 3129 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3130 portid, seq, 3131 RTM_NEWNEIGH, NTF_SELF, 3132 NLM_F_MULTI, NUD_PERMANENT); 3133 if (err < 0) 3134 return err; 3135 skip: 3136 *idx += 1; 3137 } 3138 return 0; 3139 } 3140 3141 /** 3142 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3143 * @nlh: netlink message header 3144 * @dev: netdevice 3145 * 3146 * Default netdevice operation to dump the existing unicast address list. 3147 * Returns number of addresses from list put in skb. 3148 */ 3149 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3150 struct netlink_callback *cb, 3151 struct net_device *dev, 3152 struct net_device *filter_dev, 3153 int *idx) 3154 { 3155 int err; 3156 3157 netif_addr_lock_bh(dev); 3158 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3159 if (err) 3160 goto out; 3161 nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3162 out: 3163 netif_addr_unlock_bh(dev); 3164 return err; 3165 } 3166 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3167 3168 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3169 { 3170 struct net_device *dev; 3171 struct nlattr *tb[IFLA_MAX+1]; 3172 struct net_device *br_dev = NULL; 3173 const struct net_device_ops *ops = NULL; 3174 const struct net_device_ops *cops = NULL; 3175 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3176 struct net *net = sock_net(skb->sk); 3177 struct hlist_head *head; 3178 int brport_idx = 0; 3179 int br_idx = 0; 3180 int h, s_h; 3181 int idx = 0, s_idx; 3182 int err = 0; 3183 int fidx = 0; 3184 3185 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 3186 ifla_policy) == 0) { 3187 if (tb[IFLA_MASTER]) 3188 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3189 } 3190 3191 brport_idx = ifm->ifi_index; 3192 3193 if (br_idx) { 3194 br_dev = __dev_get_by_index(net, br_idx); 3195 if (!br_dev) 3196 return -ENODEV; 3197 3198 ops = br_dev->netdev_ops; 3199 } 3200 3201 s_h = cb->args[0]; 3202 s_idx = cb->args[1]; 3203 3204 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3205 idx = 0; 3206 head = &net->dev_index_head[h]; 3207 hlist_for_each_entry(dev, head, index_hlist) { 3208 3209 if (brport_idx && (dev->ifindex != brport_idx)) 3210 continue; 3211 3212 if (!br_idx) { /* user did not specify a specific bridge */ 3213 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3214 br_dev = netdev_master_upper_dev_get(dev); 3215 cops = br_dev->netdev_ops; 3216 } 3217 } else { 3218 if (dev != br_dev && 3219 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3220 continue; 3221 3222 if (br_dev != netdev_master_upper_dev_get(dev) && 3223 !(dev->priv_flags & IFF_EBRIDGE)) 3224 continue; 3225 cops = ops; 3226 } 3227 3228 if (idx < s_idx) 3229 goto cont; 3230 3231 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3232 if (cops && cops->ndo_fdb_dump) { 3233 err = cops->ndo_fdb_dump(skb, cb, 3234 br_dev, dev, 3235 &fidx); 3236 if (err == -EMSGSIZE) 3237 goto out; 3238 } 3239 } 3240 3241 if (dev->netdev_ops->ndo_fdb_dump) 3242 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3243 dev, NULL, 3244 &fidx); 3245 else 3246 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3247 &fidx); 3248 if (err == -EMSGSIZE) 3249 goto out; 3250 3251 cops = NULL; 3252 3253 /* reset fdb offset to 0 for rest of the interfaces */ 3254 cb->args[2] = 0; 3255 fidx = 0; 3256 cont: 3257 idx++; 3258 } 3259 } 3260 3261 out: 3262 cb->args[0] = h; 3263 cb->args[1] = idx; 3264 cb->args[2] = fidx; 3265 3266 return skb->len; 3267 } 3268 3269 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3270 unsigned int attrnum, unsigned int flag) 3271 { 3272 if (mask & flag) 3273 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3274 return 0; 3275 } 3276 3277 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3278 struct net_device *dev, u16 mode, 3279 u32 flags, u32 mask, int nlflags, 3280 u32 filter_mask, 3281 int (*vlan_fill)(struct sk_buff *skb, 3282 struct net_device *dev, 3283 u32 filter_mask)) 3284 { 3285 struct nlmsghdr *nlh; 3286 struct ifinfomsg *ifm; 3287 struct nlattr *br_afspec; 3288 struct nlattr *protinfo; 3289 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3290 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3291 int err = 0; 3292 3293 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3294 if (nlh == NULL) 3295 return -EMSGSIZE; 3296 3297 ifm = nlmsg_data(nlh); 3298 ifm->ifi_family = AF_BRIDGE; 3299 ifm->__ifi_pad = 0; 3300 ifm->ifi_type = dev->type; 3301 ifm->ifi_index = dev->ifindex; 3302 ifm->ifi_flags = dev_get_flags(dev); 3303 ifm->ifi_change = 0; 3304 3305 3306 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3307 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3308 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3309 (br_dev && 3310 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3311 (dev->addr_len && 3312 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3313 (dev->ifindex != dev_get_iflink(dev) && 3314 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3315 goto nla_put_failure; 3316 3317 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3318 if (!br_afspec) 3319 goto nla_put_failure; 3320 3321 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3322 nla_nest_cancel(skb, br_afspec); 3323 goto nla_put_failure; 3324 } 3325 3326 if (mode != BRIDGE_MODE_UNDEF) { 3327 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3328 nla_nest_cancel(skb, br_afspec); 3329 goto nla_put_failure; 3330 } 3331 } 3332 if (vlan_fill) { 3333 err = vlan_fill(skb, dev, filter_mask); 3334 if (err) { 3335 nla_nest_cancel(skb, br_afspec); 3336 goto nla_put_failure; 3337 } 3338 } 3339 nla_nest_end(skb, br_afspec); 3340 3341 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3342 if (!protinfo) 3343 goto nla_put_failure; 3344 3345 if (brport_nla_put_flag(skb, flags, mask, 3346 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3347 brport_nla_put_flag(skb, flags, mask, 3348 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3349 brport_nla_put_flag(skb, flags, mask, 3350 IFLA_BRPORT_FAST_LEAVE, 3351 BR_MULTICAST_FAST_LEAVE) || 3352 brport_nla_put_flag(skb, flags, mask, 3353 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3354 brport_nla_put_flag(skb, flags, mask, 3355 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3356 brport_nla_put_flag(skb, flags, mask, 3357 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3358 brport_nla_put_flag(skb, flags, mask, 3359 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3360 brport_nla_put_flag(skb, flags, mask, 3361 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3362 nla_nest_cancel(skb, protinfo); 3363 goto nla_put_failure; 3364 } 3365 3366 nla_nest_end(skb, protinfo); 3367 3368 nlmsg_end(skb, nlh); 3369 return 0; 3370 nla_put_failure: 3371 nlmsg_cancel(skb, nlh); 3372 return err ? err : -EMSGSIZE; 3373 } 3374 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3375 3376 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3377 { 3378 struct net *net = sock_net(skb->sk); 3379 struct net_device *dev; 3380 int idx = 0; 3381 u32 portid = NETLINK_CB(cb->skb).portid; 3382 u32 seq = cb->nlh->nlmsg_seq; 3383 u32 filter_mask = 0; 3384 int err; 3385 3386 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3387 struct nlattr *extfilt; 3388 3389 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3390 IFLA_EXT_MASK); 3391 if (extfilt) { 3392 if (nla_len(extfilt) < sizeof(filter_mask)) 3393 return -EINVAL; 3394 3395 filter_mask = nla_get_u32(extfilt); 3396 } 3397 } 3398 3399 rcu_read_lock(); 3400 for_each_netdev_rcu(net, dev) { 3401 const struct net_device_ops *ops = dev->netdev_ops; 3402 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3403 3404 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3405 if (idx >= cb->args[0]) { 3406 err = br_dev->netdev_ops->ndo_bridge_getlink( 3407 skb, portid, seq, dev, 3408 filter_mask, NLM_F_MULTI); 3409 if (err < 0 && err != -EOPNOTSUPP) 3410 break; 3411 } 3412 idx++; 3413 } 3414 3415 if (ops->ndo_bridge_getlink) { 3416 if (idx >= cb->args[0]) { 3417 err = ops->ndo_bridge_getlink(skb, portid, 3418 seq, dev, 3419 filter_mask, 3420 NLM_F_MULTI); 3421 if (err < 0 && err != -EOPNOTSUPP) 3422 break; 3423 } 3424 idx++; 3425 } 3426 } 3427 rcu_read_unlock(); 3428 cb->args[0] = idx; 3429 3430 return skb->len; 3431 } 3432 3433 static inline size_t bridge_nlmsg_size(void) 3434 { 3435 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3436 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3437 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3438 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3439 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3440 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3441 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3442 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3443 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3444 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3445 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3446 } 3447 3448 static int rtnl_bridge_notify(struct net_device *dev) 3449 { 3450 struct net *net = dev_net(dev); 3451 struct sk_buff *skb; 3452 int err = -EOPNOTSUPP; 3453 3454 if (!dev->netdev_ops->ndo_bridge_getlink) 3455 return 0; 3456 3457 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3458 if (!skb) { 3459 err = -ENOMEM; 3460 goto errout; 3461 } 3462 3463 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3464 if (err < 0) 3465 goto errout; 3466 3467 if (!skb->len) 3468 goto errout; 3469 3470 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3471 return 0; 3472 errout: 3473 WARN_ON(err == -EMSGSIZE); 3474 kfree_skb(skb); 3475 if (err) 3476 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3477 return err; 3478 } 3479 3480 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3481 { 3482 struct net *net = sock_net(skb->sk); 3483 struct ifinfomsg *ifm; 3484 struct net_device *dev; 3485 struct nlattr *br_spec, *attr = NULL; 3486 int rem, err = -EOPNOTSUPP; 3487 u16 flags = 0; 3488 bool have_flags = false; 3489 3490 if (nlmsg_len(nlh) < sizeof(*ifm)) 3491 return -EINVAL; 3492 3493 ifm = nlmsg_data(nlh); 3494 if (ifm->ifi_family != AF_BRIDGE) 3495 return -EPFNOSUPPORT; 3496 3497 dev = __dev_get_by_index(net, ifm->ifi_index); 3498 if (!dev) { 3499 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3500 return -ENODEV; 3501 } 3502 3503 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3504 if (br_spec) { 3505 nla_for_each_nested(attr, br_spec, rem) { 3506 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3507 if (nla_len(attr) < sizeof(flags)) 3508 return -EINVAL; 3509 3510 have_flags = true; 3511 flags = nla_get_u16(attr); 3512 break; 3513 } 3514 } 3515 } 3516 3517 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3518 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3519 3520 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3521 err = -EOPNOTSUPP; 3522 goto out; 3523 } 3524 3525 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3526 if (err) 3527 goto out; 3528 3529 flags &= ~BRIDGE_FLAGS_MASTER; 3530 } 3531 3532 if ((flags & BRIDGE_FLAGS_SELF)) { 3533 if (!dev->netdev_ops->ndo_bridge_setlink) 3534 err = -EOPNOTSUPP; 3535 else 3536 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3537 flags); 3538 if (!err) { 3539 flags &= ~BRIDGE_FLAGS_SELF; 3540 3541 /* Generate event to notify upper layer of bridge 3542 * change 3543 */ 3544 err = rtnl_bridge_notify(dev); 3545 } 3546 } 3547 3548 if (have_flags) 3549 memcpy(nla_data(attr), &flags, sizeof(flags)); 3550 out: 3551 return err; 3552 } 3553 3554 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3555 { 3556 struct net *net = sock_net(skb->sk); 3557 struct ifinfomsg *ifm; 3558 struct net_device *dev; 3559 struct nlattr *br_spec, *attr = NULL; 3560 int rem, err = -EOPNOTSUPP; 3561 u16 flags = 0; 3562 bool have_flags = false; 3563 3564 if (nlmsg_len(nlh) < sizeof(*ifm)) 3565 return -EINVAL; 3566 3567 ifm = nlmsg_data(nlh); 3568 if (ifm->ifi_family != AF_BRIDGE) 3569 return -EPFNOSUPPORT; 3570 3571 dev = __dev_get_by_index(net, ifm->ifi_index); 3572 if (!dev) { 3573 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3574 return -ENODEV; 3575 } 3576 3577 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3578 if (br_spec) { 3579 nla_for_each_nested(attr, br_spec, rem) { 3580 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3581 if (nla_len(attr) < sizeof(flags)) 3582 return -EINVAL; 3583 3584 have_flags = true; 3585 flags = nla_get_u16(attr); 3586 break; 3587 } 3588 } 3589 } 3590 3591 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3592 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3593 3594 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3595 err = -EOPNOTSUPP; 3596 goto out; 3597 } 3598 3599 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3600 if (err) 3601 goto out; 3602 3603 flags &= ~BRIDGE_FLAGS_MASTER; 3604 } 3605 3606 if ((flags & BRIDGE_FLAGS_SELF)) { 3607 if (!dev->netdev_ops->ndo_bridge_dellink) 3608 err = -EOPNOTSUPP; 3609 else 3610 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3611 flags); 3612 3613 if (!err) { 3614 flags &= ~BRIDGE_FLAGS_SELF; 3615 3616 /* Generate event to notify upper layer of bridge 3617 * change 3618 */ 3619 err = rtnl_bridge_notify(dev); 3620 } 3621 } 3622 3623 if (have_flags) 3624 memcpy(nla_data(attr), &flags, sizeof(flags)); 3625 out: 3626 return err; 3627 } 3628 3629 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3630 { 3631 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3632 (!idxattr || idxattr == attrid); 3633 } 3634 3635 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3636 static int rtnl_get_offload_stats_attr_size(int attr_id) 3637 { 3638 switch (attr_id) { 3639 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3640 return sizeof(struct rtnl_link_stats64); 3641 } 3642 3643 return 0; 3644 } 3645 3646 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3647 int *prividx) 3648 { 3649 struct nlattr *attr = NULL; 3650 int attr_id, size; 3651 void *attr_data; 3652 int err; 3653 3654 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3655 dev->netdev_ops->ndo_get_offload_stats)) 3656 return -ENODATA; 3657 3658 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3659 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3660 if (attr_id < *prividx) 3661 continue; 3662 3663 size = rtnl_get_offload_stats_attr_size(attr_id); 3664 if (!size) 3665 continue; 3666 3667 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id)) 3668 continue; 3669 3670 attr = nla_reserve_64bit(skb, attr_id, size, 3671 IFLA_OFFLOAD_XSTATS_UNSPEC); 3672 if (!attr) 3673 goto nla_put_failure; 3674 3675 attr_data = nla_data(attr); 3676 memset(attr_data, 0, size); 3677 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3678 attr_data); 3679 if (err) 3680 goto get_offload_stats_failure; 3681 } 3682 3683 if (!attr) 3684 return -ENODATA; 3685 3686 *prividx = 0; 3687 return 0; 3688 3689 nla_put_failure: 3690 err = -EMSGSIZE; 3691 get_offload_stats_failure: 3692 *prividx = attr_id; 3693 return err; 3694 } 3695 3696 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3697 { 3698 int nla_size = 0; 3699 int attr_id; 3700 int size; 3701 3702 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3703 dev->netdev_ops->ndo_get_offload_stats)) 3704 return 0; 3705 3706 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3707 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3708 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id)) 3709 continue; 3710 size = rtnl_get_offload_stats_attr_size(attr_id); 3711 nla_size += nla_total_size_64bit(size); 3712 } 3713 3714 if (nla_size != 0) 3715 nla_size += nla_total_size(0); 3716 3717 return nla_size; 3718 } 3719 3720 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3721 int type, u32 pid, u32 seq, u32 change, 3722 unsigned int flags, unsigned int filter_mask, 3723 int *idxattr, int *prividx) 3724 { 3725 struct if_stats_msg *ifsm; 3726 struct nlmsghdr *nlh; 3727 struct nlattr *attr; 3728 int s_prividx = *prividx; 3729 int err; 3730 3731 ASSERT_RTNL(); 3732 3733 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3734 if (!nlh) 3735 return -EMSGSIZE; 3736 3737 ifsm = nlmsg_data(nlh); 3738 ifsm->ifindex = dev->ifindex; 3739 ifsm->filter_mask = filter_mask; 3740 3741 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3742 struct rtnl_link_stats64 *sp; 3743 3744 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3745 sizeof(struct rtnl_link_stats64), 3746 IFLA_STATS_UNSPEC); 3747 if (!attr) 3748 goto nla_put_failure; 3749 3750 sp = nla_data(attr); 3751 dev_get_stats(dev, sp); 3752 } 3753 3754 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3755 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3756 3757 if (ops && ops->fill_linkxstats) { 3758 *idxattr = IFLA_STATS_LINK_XSTATS; 3759 attr = nla_nest_start(skb, 3760 IFLA_STATS_LINK_XSTATS); 3761 if (!attr) 3762 goto nla_put_failure; 3763 3764 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3765 nla_nest_end(skb, attr); 3766 if (err) 3767 goto nla_put_failure; 3768 *idxattr = 0; 3769 } 3770 } 3771 3772 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3773 *idxattr)) { 3774 const struct rtnl_link_ops *ops = NULL; 3775 const struct net_device *master; 3776 3777 master = netdev_master_upper_dev_get(dev); 3778 if (master) 3779 ops = master->rtnl_link_ops; 3780 if (ops && ops->fill_linkxstats) { 3781 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3782 attr = nla_nest_start(skb, 3783 IFLA_STATS_LINK_XSTATS_SLAVE); 3784 if (!attr) 3785 goto nla_put_failure; 3786 3787 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3788 nla_nest_end(skb, attr); 3789 if (err) 3790 goto nla_put_failure; 3791 *idxattr = 0; 3792 } 3793 } 3794 3795 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 3796 *idxattr)) { 3797 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 3798 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 3799 if (!attr) 3800 goto nla_put_failure; 3801 3802 err = rtnl_get_offload_stats(skb, dev, prividx); 3803 if (err == -ENODATA) 3804 nla_nest_cancel(skb, attr); 3805 else 3806 nla_nest_end(skb, attr); 3807 3808 if (err && err != -ENODATA) 3809 goto nla_put_failure; 3810 *idxattr = 0; 3811 } 3812 3813 nlmsg_end(skb, nlh); 3814 3815 return 0; 3816 3817 nla_put_failure: 3818 /* not a multi message or no progress mean a real error */ 3819 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 3820 nlmsg_cancel(skb, nlh); 3821 else 3822 nlmsg_end(skb, nlh); 3823 3824 return -EMSGSIZE; 3825 } 3826 3827 static size_t if_nlmsg_stats_size(const struct net_device *dev, 3828 u32 filter_mask) 3829 { 3830 size_t size = 0; 3831 3832 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 3833 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 3834 3835 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 3836 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3837 int attr = IFLA_STATS_LINK_XSTATS; 3838 3839 if (ops && ops->get_linkxstats_size) { 3840 size += nla_total_size(ops->get_linkxstats_size(dev, 3841 attr)); 3842 /* for IFLA_STATS_LINK_XSTATS */ 3843 size += nla_total_size(0); 3844 } 3845 } 3846 3847 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 3848 struct net_device *_dev = (struct net_device *)dev; 3849 const struct rtnl_link_ops *ops = NULL; 3850 const struct net_device *master; 3851 3852 /* netdev_master_upper_dev_get can't take const */ 3853 master = netdev_master_upper_dev_get(_dev); 3854 if (master) 3855 ops = master->rtnl_link_ops; 3856 if (ops && ops->get_linkxstats_size) { 3857 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 3858 3859 size += nla_total_size(ops->get_linkxstats_size(dev, 3860 attr)); 3861 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 3862 size += nla_total_size(0); 3863 } 3864 } 3865 3866 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 3867 size += rtnl_get_offload_stats_size(dev); 3868 3869 return size; 3870 } 3871 3872 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh) 3873 { 3874 struct net *net = sock_net(skb->sk); 3875 struct net_device *dev = NULL; 3876 int idxattr = 0, prividx = 0; 3877 struct if_stats_msg *ifsm; 3878 struct sk_buff *nskb; 3879 u32 filter_mask; 3880 int err; 3881 3882 ifsm = nlmsg_data(nlh); 3883 if (ifsm->ifindex > 0) 3884 dev = __dev_get_by_index(net, ifsm->ifindex); 3885 else 3886 return -EINVAL; 3887 3888 if (!dev) 3889 return -ENODEV; 3890 3891 filter_mask = ifsm->filter_mask; 3892 if (!filter_mask) 3893 return -EINVAL; 3894 3895 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 3896 if (!nskb) 3897 return -ENOBUFS; 3898 3899 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 3900 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 3901 0, filter_mask, &idxattr, &prividx); 3902 if (err < 0) { 3903 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 3904 WARN_ON(err == -EMSGSIZE); 3905 kfree_skb(nskb); 3906 } else { 3907 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3908 } 3909 3910 return err; 3911 } 3912 3913 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 3914 { 3915 int h, s_h, err, s_idx, s_idxattr, s_prividx; 3916 struct net *net = sock_net(skb->sk); 3917 unsigned int flags = NLM_F_MULTI; 3918 struct if_stats_msg *ifsm; 3919 struct hlist_head *head; 3920 struct net_device *dev; 3921 u32 filter_mask = 0; 3922 int idx = 0; 3923 3924 s_h = cb->args[0]; 3925 s_idx = cb->args[1]; 3926 s_idxattr = cb->args[2]; 3927 s_prividx = cb->args[3]; 3928 3929 cb->seq = net->dev_base_seq; 3930 3931 ifsm = nlmsg_data(cb->nlh); 3932 filter_mask = ifsm->filter_mask; 3933 if (!filter_mask) 3934 return -EINVAL; 3935 3936 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3937 idx = 0; 3938 head = &net->dev_index_head[h]; 3939 hlist_for_each_entry(dev, head, index_hlist) { 3940 if (idx < s_idx) 3941 goto cont; 3942 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 3943 NETLINK_CB(cb->skb).portid, 3944 cb->nlh->nlmsg_seq, 0, 3945 flags, filter_mask, 3946 &s_idxattr, &s_prividx); 3947 /* If we ran out of room on the first message, 3948 * we're in trouble 3949 */ 3950 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 3951 3952 if (err < 0) 3953 goto out; 3954 s_prividx = 0; 3955 s_idxattr = 0; 3956 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 3957 cont: 3958 idx++; 3959 } 3960 } 3961 out: 3962 cb->args[3] = s_prividx; 3963 cb->args[2] = s_idxattr; 3964 cb->args[1] = idx; 3965 cb->args[0] = h; 3966 3967 return skb->len; 3968 } 3969 3970 /* Process one rtnetlink message. */ 3971 3972 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3973 { 3974 struct net *net = sock_net(skb->sk); 3975 rtnl_doit_func doit; 3976 int kind; 3977 int family; 3978 int type; 3979 int err; 3980 3981 type = nlh->nlmsg_type; 3982 if (type > RTM_MAX) 3983 return -EOPNOTSUPP; 3984 3985 type -= RTM_BASE; 3986 3987 /* All the messages must have at least 1 byte length */ 3988 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3989 return 0; 3990 3991 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3992 kind = type&3; 3993 3994 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 3995 return -EPERM; 3996 3997 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 3998 struct sock *rtnl; 3999 rtnl_dumpit_func dumpit; 4000 rtnl_calcit_func calcit; 4001 u16 min_dump_alloc = 0; 4002 4003 dumpit = rtnl_get_dumpit(family, type); 4004 if (dumpit == NULL) 4005 return -EOPNOTSUPP; 4006 calcit = rtnl_get_calcit(family, type); 4007 if (calcit) 4008 min_dump_alloc = calcit(skb, nlh); 4009 4010 __rtnl_unlock(); 4011 rtnl = net->rtnl; 4012 { 4013 struct netlink_dump_control c = { 4014 .dump = dumpit, 4015 .min_dump_alloc = min_dump_alloc, 4016 }; 4017 err = netlink_dump_start(rtnl, skb, nlh, &c); 4018 } 4019 rtnl_lock(); 4020 return err; 4021 } 4022 4023 doit = rtnl_get_doit(family, type); 4024 if (doit == NULL) 4025 return -EOPNOTSUPP; 4026 4027 return doit(skb, nlh); 4028 } 4029 4030 static void rtnetlink_rcv(struct sk_buff *skb) 4031 { 4032 rtnl_lock(); 4033 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4034 rtnl_unlock(); 4035 } 4036 4037 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4038 { 4039 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4040 4041 switch (event) { 4042 case NETDEV_UP: 4043 case NETDEV_DOWN: 4044 case NETDEV_PRE_UP: 4045 case NETDEV_POST_INIT: 4046 case NETDEV_REGISTER: 4047 case NETDEV_CHANGE: 4048 case NETDEV_PRE_TYPE_CHANGE: 4049 case NETDEV_GOING_DOWN: 4050 case NETDEV_UNREGISTER: 4051 case NETDEV_UNREGISTER_FINAL: 4052 case NETDEV_RELEASE: 4053 case NETDEV_JOIN: 4054 case NETDEV_BONDING_INFO: 4055 break; 4056 default: 4057 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 4058 break; 4059 } 4060 return NOTIFY_DONE; 4061 } 4062 4063 static struct notifier_block rtnetlink_dev_notifier = { 4064 .notifier_call = rtnetlink_event, 4065 }; 4066 4067 4068 static int __net_init rtnetlink_net_init(struct net *net) 4069 { 4070 struct sock *sk; 4071 struct netlink_kernel_cfg cfg = { 4072 .groups = RTNLGRP_MAX, 4073 .input = rtnetlink_rcv, 4074 .cb_mutex = &rtnl_mutex, 4075 .flags = NL_CFG_F_NONROOT_RECV, 4076 }; 4077 4078 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4079 if (!sk) 4080 return -ENOMEM; 4081 net->rtnl = sk; 4082 return 0; 4083 } 4084 4085 static void __net_exit rtnetlink_net_exit(struct net *net) 4086 { 4087 netlink_kernel_release(net->rtnl); 4088 net->rtnl = NULL; 4089 } 4090 4091 static struct pernet_operations rtnetlink_net_ops = { 4092 .init = rtnetlink_net_init, 4093 .exit = rtnetlink_net_exit, 4094 }; 4095 4096 void __init rtnetlink_init(void) 4097 { 4098 if (register_pernet_subsys(&rtnetlink_net_ops)) 4099 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4100 4101 register_netdevice_notifier(&rtnetlink_dev_notifier); 4102 4103 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4104 rtnl_dump_ifinfo, rtnl_calcit); 4105 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 4106 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 4107 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 4108 4109 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 4110 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 4111 4112 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 4113 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 4114 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 4115 4116 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 4117 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 4118 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 4119 4120 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4121 NULL); 4122 } 4123