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 <linux/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 rtnl_msg_handlers[protocol][msgindex].calcit = NULL; 279 280 return 0; 281 } 282 EXPORT_SYMBOL_GPL(rtnl_unregister); 283 284 /** 285 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 286 * @protocol : Protocol family or PF_UNSPEC 287 * 288 * Identical to calling rtnl_unregster() for all registered message types 289 * of a certain protocol family. 290 */ 291 void rtnl_unregister_all(int protocol) 292 { 293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 294 295 kfree(rtnl_msg_handlers[protocol]); 296 rtnl_msg_handlers[protocol] = NULL; 297 } 298 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 299 300 static LIST_HEAD(link_ops); 301 302 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 303 { 304 const struct rtnl_link_ops *ops; 305 306 list_for_each_entry(ops, &link_ops, list) { 307 if (!strcmp(ops->kind, kind)) 308 return ops; 309 } 310 return NULL; 311 } 312 313 /** 314 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 315 * @ops: struct rtnl_link_ops * to register 316 * 317 * The caller must hold the rtnl_mutex. This function should be used 318 * by drivers that create devices during module initialization. It 319 * must be called before registering the devices. 320 * 321 * Returns 0 on success or a negative error code. 322 */ 323 int __rtnl_link_register(struct rtnl_link_ops *ops) 324 { 325 if (rtnl_link_ops_get(ops->kind)) 326 return -EEXIST; 327 328 /* The check for setup is here because if ops 329 * does not have that filled up, it is not possible 330 * to use the ops for creating device. So do not 331 * fill up dellink as well. That disables rtnl_dellink. 332 */ 333 if (ops->setup && !ops->dellink) 334 ops->dellink = unregister_netdevice_queue; 335 336 list_add_tail(&ops->list, &link_ops); 337 return 0; 338 } 339 EXPORT_SYMBOL_GPL(__rtnl_link_register); 340 341 /** 342 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 343 * @ops: struct rtnl_link_ops * to register 344 * 345 * Returns 0 on success or a negative error code. 346 */ 347 int rtnl_link_register(struct rtnl_link_ops *ops) 348 { 349 int err; 350 351 rtnl_lock(); 352 err = __rtnl_link_register(ops); 353 rtnl_unlock(); 354 return err; 355 } 356 EXPORT_SYMBOL_GPL(rtnl_link_register); 357 358 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 359 { 360 struct net_device *dev; 361 LIST_HEAD(list_kill); 362 363 for_each_netdev(net, dev) { 364 if (dev->rtnl_link_ops == ops) 365 ops->dellink(dev, &list_kill); 366 } 367 unregister_netdevice_many(&list_kill); 368 } 369 370 /** 371 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 372 * @ops: struct rtnl_link_ops * to unregister 373 * 374 * The caller must hold the rtnl_mutex. 375 */ 376 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 377 { 378 struct net *net; 379 380 for_each_net(net) { 381 __rtnl_kill_links(net, ops); 382 } 383 list_del(&ops->list); 384 } 385 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 386 387 /* Return with the rtnl_lock held when there are no network 388 * devices unregistering in any network namespace. 389 */ 390 static void rtnl_lock_unregistering_all(void) 391 { 392 struct net *net; 393 bool unregistering; 394 DEFINE_WAIT_FUNC(wait, woken_wake_function); 395 396 add_wait_queue(&netdev_unregistering_wq, &wait); 397 for (;;) { 398 unregistering = false; 399 rtnl_lock(); 400 for_each_net(net) { 401 if (net->dev_unreg_count > 0) { 402 unregistering = true; 403 break; 404 } 405 } 406 if (!unregistering) 407 break; 408 __rtnl_unlock(); 409 410 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 411 } 412 remove_wait_queue(&netdev_unregistering_wq, &wait); 413 } 414 415 /** 416 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 417 * @ops: struct rtnl_link_ops * to unregister 418 */ 419 void rtnl_link_unregister(struct rtnl_link_ops *ops) 420 { 421 /* Close the race with cleanup_net() */ 422 mutex_lock(&net_mutex); 423 rtnl_lock_unregistering_all(); 424 __rtnl_link_unregister(ops); 425 rtnl_unlock(); 426 mutex_unlock(&net_mutex); 427 } 428 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 429 430 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 431 { 432 struct net_device *master_dev; 433 const struct rtnl_link_ops *ops; 434 435 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 436 if (!master_dev) 437 return 0; 438 ops = master_dev->rtnl_link_ops; 439 if (!ops || !ops->get_slave_size) 440 return 0; 441 /* IFLA_INFO_SLAVE_DATA + nested data */ 442 return nla_total_size(sizeof(struct nlattr)) + 443 ops->get_slave_size(master_dev, dev); 444 } 445 446 static size_t rtnl_link_get_size(const struct net_device *dev) 447 { 448 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 449 size_t size; 450 451 if (!ops) 452 return 0; 453 454 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 455 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 456 457 if (ops->get_size) 458 /* IFLA_INFO_DATA + nested data */ 459 size += nla_total_size(sizeof(struct nlattr)) + 460 ops->get_size(dev); 461 462 if (ops->get_xstats_size) 463 /* IFLA_INFO_XSTATS */ 464 size += nla_total_size(ops->get_xstats_size(dev)); 465 466 size += rtnl_link_get_slave_info_data_size(dev); 467 468 return size; 469 } 470 471 static LIST_HEAD(rtnl_af_ops); 472 473 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 474 { 475 const struct rtnl_af_ops *ops; 476 477 list_for_each_entry(ops, &rtnl_af_ops, list) { 478 if (ops->family == family) 479 return ops; 480 } 481 482 return NULL; 483 } 484 485 /** 486 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 487 * @ops: struct rtnl_af_ops * to register 488 * 489 * Returns 0 on success or a negative error code. 490 */ 491 void rtnl_af_register(struct rtnl_af_ops *ops) 492 { 493 rtnl_lock(); 494 list_add_tail(&ops->list, &rtnl_af_ops); 495 rtnl_unlock(); 496 } 497 EXPORT_SYMBOL_GPL(rtnl_af_register); 498 499 /** 500 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 501 * @ops: struct rtnl_af_ops * to unregister 502 * 503 * The caller must hold the rtnl_mutex. 504 */ 505 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 506 { 507 list_del(&ops->list); 508 } 509 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 510 511 /** 512 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 513 * @ops: struct rtnl_af_ops * to unregister 514 */ 515 void rtnl_af_unregister(struct rtnl_af_ops *ops) 516 { 517 rtnl_lock(); 518 __rtnl_af_unregister(ops); 519 rtnl_unlock(); 520 } 521 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 522 523 static size_t rtnl_link_get_af_size(const struct net_device *dev, 524 u32 ext_filter_mask) 525 { 526 struct rtnl_af_ops *af_ops; 527 size_t size; 528 529 /* IFLA_AF_SPEC */ 530 size = nla_total_size(sizeof(struct nlattr)); 531 532 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 533 if (af_ops->get_link_af_size) { 534 /* AF_* + nested data */ 535 size += nla_total_size(sizeof(struct nlattr)) + 536 af_ops->get_link_af_size(dev, ext_filter_mask); 537 } 538 } 539 540 return size; 541 } 542 543 static bool rtnl_have_link_slave_info(const struct net_device *dev) 544 { 545 struct net_device *master_dev; 546 547 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 548 if (master_dev && master_dev->rtnl_link_ops) 549 return true; 550 return false; 551 } 552 553 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 554 const struct net_device *dev) 555 { 556 struct net_device *master_dev; 557 const struct rtnl_link_ops *ops; 558 struct nlattr *slave_data; 559 int err; 560 561 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 562 if (!master_dev) 563 return 0; 564 ops = master_dev->rtnl_link_ops; 565 if (!ops) 566 return 0; 567 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 568 return -EMSGSIZE; 569 if (ops->fill_slave_info) { 570 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 571 if (!slave_data) 572 return -EMSGSIZE; 573 err = ops->fill_slave_info(skb, master_dev, dev); 574 if (err < 0) 575 goto err_cancel_slave_data; 576 nla_nest_end(skb, slave_data); 577 } 578 return 0; 579 580 err_cancel_slave_data: 581 nla_nest_cancel(skb, slave_data); 582 return err; 583 } 584 585 static int rtnl_link_info_fill(struct sk_buff *skb, 586 const struct net_device *dev) 587 { 588 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 589 struct nlattr *data; 590 int err; 591 592 if (!ops) 593 return 0; 594 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 595 return -EMSGSIZE; 596 if (ops->fill_xstats) { 597 err = ops->fill_xstats(skb, dev); 598 if (err < 0) 599 return err; 600 } 601 if (ops->fill_info) { 602 data = nla_nest_start(skb, IFLA_INFO_DATA); 603 if (data == NULL) 604 return -EMSGSIZE; 605 err = ops->fill_info(skb, dev); 606 if (err < 0) 607 goto err_cancel_data; 608 nla_nest_end(skb, data); 609 } 610 return 0; 611 612 err_cancel_data: 613 nla_nest_cancel(skb, data); 614 return err; 615 } 616 617 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 618 { 619 struct nlattr *linkinfo; 620 int err = -EMSGSIZE; 621 622 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 623 if (linkinfo == NULL) 624 goto out; 625 626 err = rtnl_link_info_fill(skb, dev); 627 if (err < 0) 628 goto err_cancel_link; 629 630 err = rtnl_link_slave_info_fill(skb, dev); 631 if (err < 0) 632 goto err_cancel_link; 633 634 nla_nest_end(skb, linkinfo); 635 return 0; 636 637 err_cancel_link: 638 nla_nest_cancel(skb, linkinfo); 639 out: 640 return err; 641 } 642 643 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 644 { 645 struct sock *rtnl = net->rtnl; 646 int err = 0; 647 648 NETLINK_CB(skb).dst_group = group; 649 if (echo) 650 atomic_inc(&skb->users); 651 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 652 if (echo) 653 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 654 return err; 655 } 656 657 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 658 { 659 struct sock *rtnl = net->rtnl; 660 661 return nlmsg_unicast(rtnl, skb, pid); 662 } 663 EXPORT_SYMBOL(rtnl_unicast); 664 665 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 666 struct nlmsghdr *nlh, gfp_t flags) 667 { 668 struct sock *rtnl = net->rtnl; 669 int report = 0; 670 671 if (nlh) 672 report = nlmsg_report(nlh); 673 674 nlmsg_notify(rtnl, skb, pid, group, report, flags); 675 } 676 EXPORT_SYMBOL(rtnl_notify); 677 678 void rtnl_set_sk_err(struct net *net, u32 group, int error) 679 { 680 struct sock *rtnl = net->rtnl; 681 682 netlink_set_err(rtnl, 0, group, error); 683 } 684 EXPORT_SYMBOL(rtnl_set_sk_err); 685 686 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 687 { 688 struct nlattr *mx; 689 int i, valid = 0; 690 691 mx = nla_nest_start(skb, RTA_METRICS); 692 if (mx == NULL) 693 return -ENOBUFS; 694 695 for (i = 0; i < RTAX_MAX; i++) { 696 if (metrics[i]) { 697 if (i == RTAX_CC_ALGO - 1) { 698 char tmp[TCP_CA_NAME_MAX], *name; 699 700 name = tcp_ca_get_name_by_key(metrics[i], tmp); 701 if (!name) 702 continue; 703 if (nla_put_string(skb, i + 1, name)) 704 goto nla_put_failure; 705 } else if (i == RTAX_FEATURES - 1) { 706 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 707 708 if (!user_features) 709 continue; 710 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 711 if (nla_put_u32(skb, i + 1, user_features)) 712 goto nla_put_failure; 713 } else { 714 if (nla_put_u32(skb, i + 1, metrics[i])) 715 goto nla_put_failure; 716 } 717 valid++; 718 } 719 } 720 721 if (!valid) { 722 nla_nest_cancel(skb, mx); 723 return 0; 724 } 725 726 return nla_nest_end(skb, mx); 727 728 nla_put_failure: 729 nla_nest_cancel(skb, mx); 730 return -EMSGSIZE; 731 } 732 EXPORT_SYMBOL(rtnetlink_put_metrics); 733 734 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 735 long expires, u32 error) 736 { 737 struct rta_cacheinfo ci = { 738 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 739 .rta_used = dst->__use, 740 .rta_clntref = atomic_read(&(dst->__refcnt)), 741 .rta_error = error, 742 .rta_id = id, 743 }; 744 745 if (expires) { 746 unsigned long clock; 747 748 clock = jiffies_to_clock_t(abs(expires)); 749 clock = min_t(unsigned long, clock, INT_MAX); 750 ci.rta_expires = (expires > 0) ? clock : -clock; 751 } 752 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 753 } 754 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 755 756 static void set_operstate(struct net_device *dev, unsigned char transition) 757 { 758 unsigned char operstate = dev->operstate; 759 760 switch (transition) { 761 case IF_OPER_UP: 762 if ((operstate == IF_OPER_DORMANT || 763 operstate == IF_OPER_UNKNOWN) && 764 !netif_dormant(dev)) 765 operstate = IF_OPER_UP; 766 break; 767 768 case IF_OPER_DORMANT: 769 if (operstate == IF_OPER_UP || 770 operstate == IF_OPER_UNKNOWN) 771 operstate = IF_OPER_DORMANT; 772 break; 773 } 774 775 if (dev->operstate != operstate) { 776 write_lock_bh(&dev_base_lock); 777 dev->operstate = operstate; 778 write_unlock_bh(&dev_base_lock); 779 netdev_state_change(dev); 780 } 781 } 782 783 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 784 { 785 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 786 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 787 } 788 789 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 790 const struct ifinfomsg *ifm) 791 { 792 unsigned int flags = ifm->ifi_flags; 793 794 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 795 if (ifm->ifi_change) 796 flags = (flags & ifm->ifi_change) | 797 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 798 799 return flags; 800 } 801 802 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 803 const struct rtnl_link_stats64 *b) 804 { 805 a->rx_packets = b->rx_packets; 806 a->tx_packets = b->tx_packets; 807 a->rx_bytes = b->rx_bytes; 808 a->tx_bytes = b->tx_bytes; 809 a->rx_errors = b->rx_errors; 810 a->tx_errors = b->tx_errors; 811 a->rx_dropped = b->rx_dropped; 812 a->tx_dropped = b->tx_dropped; 813 814 a->multicast = b->multicast; 815 a->collisions = b->collisions; 816 817 a->rx_length_errors = b->rx_length_errors; 818 a->rx_over_errors = b->rx_over_errors; 819 a->rx_crc_errors = b->rx_crc_errors; 820 a->rx_frame_errors = b->rx_frame_errors; 821 a->rx_fifo_errors = b->rx_fifo_errors; 822 a->rx_missed_errors = b->rx_missed_errors; 823 824 a->tx_aborted_errors = b->tx_aborted_errors; 825 a->tx_carrier_errors = b->tx_carrier_errors; 826 a->tx_fifo_errors = b->tx_fifo_errors; 827 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 828 a->tx_window_errors = b->tx_window_errors; 829 830 a->rx_compressed = b->rx_compressed; 831 a->tx_compressed = b->tx_compressed; 832 833 a->rx_nohandler = b->rx_nohandler; 834 } 835 836 /* All VF info */ 837 static inline int rtnl_vfinfo_size(const struct net_device *dev, 838 u32 ext_filter_mask) 839 { 840 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) { 841 int num_vfs = dev_num_vf(dev->dev.parent); 842 size_t size = nla_total_size(0); 843 size += num_vfs * 844 (nla_total_size(0) + 845 nla_total_size(sizeof(struct ifla_vf_mac)) + 846 nla_total_size(sizeof(struct ifla_vf_vlan)) + 847 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ 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_tx_rate)) + 852 nla_total_size(sizeof(struct ifla_vf_rate)) + 853 nla_total_size(sizeof(struct ifla_vf_link_state)) + 854 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 855 nla_total_size(0) + /* nest IFLA_VF_STATS */ 856 /* IFLA_VF_STATS_RX_PACKETS */ 857 nla_total_size_64bit(sizeof(__u64)) + 858 /* IFLA_VF_STATS_TX_PACKETS */ 859 nla_total_size_64bit(sizeof(__u64)) + 860 /* IFLA_VF_STATS_RX_BYTES */ 861 nla_total_size_64bit(sizeof(__u64)) + 862 /* IFLA_VF_STATS_TX_BYTES */ 863 nla_total_size_64bit(sizeof(__u64)) + 864 /* IFLA_VF_STATS_BROADCAST */ 865 nla_total_size_64bit(sizeof(__u64)) + 866 /* IFLA_VF_STATS_MULTICAST */ 867 nla_total_size_64bit(sizeof(__u64)) + 868 nla_total_size(sizeof(struct ifla_vf_trust))); 869 return size; 870 } else 871 return 0; 872 } 873 874 static size_t rtnl_port_size(const struct net_device *dev, 875 u32 ext_filter_mask) 876 { 877 size_t port_size = nla_total_size(4) /* PORT_VF */ 878 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 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(0) + /* nest IFLA_XDP */ 902 nla_total_size(1); /* XDP_ATTACHED */ 903 904 if (!dev->netdev_ops->ndo_xdp) 905 return 0; 906 else 907 return xdp_size; 908 } 909 910 static noinline size_t if_nlmsg_size(const struct net_device *dev, 911 u32 ext_filter_mask) 912 { 913 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 914 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 915 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 916 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 917 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 918 + nla_total_size(sizeof(struct rtnl_link_stats)) 919 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 920 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 921 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 922 + nla_total_size(4) /* IFLA_TXQLEN */ 923 + nla_total_size(4) /* IFLA_WEIGHT */ 924 + nla_total_size(4) /* IFLA_MTU */ 925 + nla_total_size(4) /* IFLA_LINK */ 926 + nla_total_size(4) /* IFLA_MASTER */ 927 + nla_total_size(1) /* IFLA_CARRIER */ 928 + nla_total_size(4) /* IFLA_PROMISCUITY */ 929 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 930 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 931 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 932 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 933 + nla_total_size(1) /* IFLA_OPERSTATE */ 934 + nla_total_size(1) /* IFLA_LINKMODE */ 935 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 936 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 937 + nla_total_size(ext_filter_mask 938 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 939 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 940 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 941 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 942 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 943 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 944 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 945 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 946 + rtnl_xdp_size(dev) /* IFLA_XDP */ 947 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 948 949 } 950 951 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 952 { 953 struct nlattr *vf_ports; 954 struct nlattr *vf_port; 955 int vf; 956 int err; 957 958 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 959 if (!vf_ports) 960 return -EMSGSIZE; 961 962 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 963 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 964 if (!vf_port) 965 goto nla_put_failure; 966 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 967 goto nla_put_failure; 968 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 969 if (err == -EMSGSIZE) 970 goto nla_put_failure; 971 if (err) { 972 nla_nest_cancel(skb, vf_port); 973 continue; 974 } 975 nla_nest_end(skb, vf_port); 976 } 977 978 nla_nest_end(skb, vf_ports); 979 980 return 0; 981 982 nla_put_failure: 983 nla_nest_cancel(skb, vf_ports); 984 return -EMSGSIZE; 985 } 986 987 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 988 { 989 struct nlattr *port_self; 990 int err; 991 992 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 993 if (!port_self) 994 return -EMSGSIZE; 995 996 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 997 if (err) { 998 nla_nest_cancel(skb, port_self); 999 return (err == -EMSGSIZE) ? err : 0; 1000 } 1001 1002 nla_nest_end(skb, port_self); 1003 1004 return 0; 1005 } 1006 1007 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1008 u32 ext_filter_mask) 1009 { 1010 int err; 1011 1012 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1013 !(ext_filter_mask & RTEXT_FILTER_VF)) 1014 return 0; 1015 1016 err = rtnl_port_self_fill(skb, dev); 1017 if (err) 1018 return err; 1019 1020 if (dev_num_vf(dev->dev.parent)) { 1021 err = rtnl_vf_ports_fill(skb, dev); 1022 if (err) 1023 return err; 1024 } 1025 1026 return 0; 1027 } 1028 1029 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1030 { 1031 int err; 1032 struct netdev_phys_item_id ppid; 1033 1034 err = dev_get_phys_port_id(dev, &ppid); 1035 if (err) { 1036 if (err == -EOPNOTSUPP) 1037 return 0; 1038 return err; 1039 } 1040 1041 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1042 return -EMSGSIZE; 1043 1044 return 0; 1045 } 1046 1047 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1048 { 1049 char name[IFNAMSIZ]; 1050 int err; 1051 1052 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1053 if (err) { 1054 if (err == -EOPNOTSUPP) 1055 return 0; 1056 return err; 1057 } 1058 1059 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 1060 return -EMSGSIZE; 1061 1062 return 0; 1063 } 1064 1065 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1066 { 1067 int err; 1068 struct switchdev_attr attr = { 1069 .orig_dev = dev, 1070 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1071 .flags = SWITCHDEV_F_NO_RECURSE, 1072 }; 1073 1074 err = switchdev_port_attr_get(dev, &attr); 1075 if (err) { 1076 if (err == -EOPNOTSUPP) 1077 return 0; 1078 return err; 1079 } 1080 1081 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1082 attr.u.ppid.id)) 1083 return -EMSGSIZE; 1084 1085 return 0; 1086 } 1087 1088 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1089 struct net_device *dev) 1090 { 1091 struct rtnl_link_stats64 *sp; 1092 struct nlattr *attr; 1093 1094 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1095 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1096 if (!attr) 1097 return -EMSGSIZE; 1098 1099 sp = nla_data(attr); 1100 dev_get_stats(dev, sp); 1101 1102 attr = nla_reserve(skb, IFLA_STATS, 1103 sizeof(struct rtnl_link_stats)); 1104 if (!attr) 1105 return -EMSGSIZE; 1106 1107 copy_rtnl_link_stats(nla_data(attr), sp); 1108 1109 return 0; 1110 } 1111 1112 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1113 struct net_device *dev, 1114 int vfs_num, 1115 struct nlattr *vfinfo) 1116 { 1117 struct ifla_vf_rss_query_en vf_rss_query_en; 1118 struct nlattr *vf, *vfstats, *vfvlanlist; 1119 struct ifla_vf_link_state vf_linkstate; 1120 struct ifla_vf_vlan_info vf_vlan_info; 1121 struct ifla_vf_spoofchk vf_spoofchk; 1122 struct ifla_vf_tx_rate vf_tx_rate; 1123 struct ifla_vf_stats vf_stats; 1124 struct ifla_vf_trust vf_trust; 1125 struct ifla_vf_vlan vf_vlan; 1126 struct ifla_vf_rate vf_rate; 1127 struct ifla_vf_mac vf_mac; 1128 struct ifla_vf_info ivi; 1129 1130 /* Not all SR-IOV capable drivers support the 1131 * spoofcheck and "RSS query enable" query. Preset to 1132 * -1 so the user space tool can detect that the driver 1133 * didn't report anything. 1134 */ 1135 ivi.spoofchk = -1; 1136 ivi.rss_query_en = -1; 1137 ivi.trusted = -1; 1138 memset(ivi.mac, 0, sizeof(ivi.mac)); 1139 /* The default value for VF link state is "auto" 1140 * IFLA_VF_LINK_STATE_AUTO which equals zero 1141 */ 1142 ivi.linkstate = 0; 1143 /* VLAN Protocol by default is 802.1Q */ 1144 ivi.vlan_proto = htons(ETH_P_8021Q); 1145 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1146 return 0; 1147 1148 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1149 1150 vf_mac.vf = 1151 vf_vlan.vf = 1152 vf_vlan_info.vf = 1153 vf_rate.vf = 1154 vf_tx_rate.vf = 1155 vf_spoofchk.vf = 1156 vf_linkstate.vf = 1157 vf_rss_query_en.vf = 1158 vf_trust.vf = ivi.vf; 1159 1160 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1161 vf_vlan.vlan = ivi.vlan; 1162 vf_vlan.qos = ivi.qos; 1163 vf_vlan_info.vlan = ivi.vlan; 1164 vf_vlan_info.qos = ivi.qos; 1165 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1166 vf_tx_rate.rate = ivi.max_tx_rate; 1167 vf_rate.min_tx_rate = ivi.min_tx_rate; 1168 vf_rate.max_tx_rate = ivi.max_tx_rate; 1169 vf_spoofchk.setting = ivi.spoofchk; 1170 vf_linkstate.link_state = ivi.linkstate; 1171 vf_rss_query_en.setting = ivi.rss_query_en; 1172 vf_trust.setting = ivi.trusted; 1173 vf = nla_nest_start(skb, IFLA_VF_INFO); 1174 if (!vf) 1175 goto nla_put_vfinfo_failure; 1176 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1177 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1178 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1179 &vf_rate) || 1180 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1181 &vf_tx_rate) || 1182 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1183 &vf_spoofchk) || 1184 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1185 &vf_linkstate) || 1186 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1187 sizeof(vf_rss_query_en), 1188 &vf_rss_query_en) || 1189 nla_put(skb, IFLA_VF_TRUST, 1190 sizeof(vf_trust), &vf_trust)) 1191 goto nla_put_vf_failure; 1192 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST); 1193 if (!vfvlanlist) 1194 goto nla_put_vf_failure; 1195 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1196 &vf_vlan_info)) { 1197 nla_nest_cancel(skb, vfvlanlist); 1198 goto nla_put_vf_failure; 1199 } 1200 nla_nest_end(skb, vfvlanlist); 1201 memset(&vf_stats, 0, sizeof(vf_stats)); 1202 if (dev->netdev_ops->ndo_get_vf_stats) 1203 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1204 &vf_stats); 1205 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1206 if (!vfstats) 1207 goto nla_put_vf_failure; 1208 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1209 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1210 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1211 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1213 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1215 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1217 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1218 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1219 vf_stats.multicast, IFLA_VF_STATS_PAD)) { 1220 nla_nest_cancel(skb, vfstats); 1221 goto nla_put_vf_failure; 1222 } 1223 nla_nest_end(skb, vfstats); 1224 nla_nest_end(skb, vf); 1225 return 0; 1226 1227 nla_put_vf_failure: 1228 nla_nest_cancel(skb, vf); 1229 nla_put_vfinfo_failure: 1230 nla_nest_cancel(skb, vfinfo); 1231 return -EMSGSIZE; 1232 } 1233 1234 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1235 { 1236 struct rtnl_link_ifmap map; 1237 1238 memset(&map, 0, sizeof(map)); 1239 map.mem_start = dev->mem_start; 1240 map.mem_end = dev->mem_end; 1241 map.base_addr = dev->base_addr; 1242 map.irq = dev->irq; 1243 map.dma = dev->dma; 1244 map.port = dev->if_port; 1245 1246 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1247 return -EMSGSIZE; 1248 1249 return 0; 1250 } 1251 1252 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1253 { 1254 struct netdev_xdp xdp_op = {}; 1255 struct nlattr *xdp; 1256 int err; 1257 1258 if (!dev->netdev_ops->ndo_xdp) 1259 return 0; 1260 xdp = nla_nest_start(skb, IFLA_XDP); 1261 if (!xdp) 1262 return -EMSGSIZE; 1263 xdp_op.command = XDP_QUERY_PROG; 1264 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op); 1265 if (err) 1266 goto err_cancel; 1267 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached); 1268 if (err) 1269 goto err_cancel; 1270 1271 nla_nest_end(skb, xdp); 1272 return 0; 1273 1274 err_cancel: 1275 nla_nest_cancel(skb, xdp); 1276 return err; 1277 } 1278 1279 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1280 int type, u32 pid, u32 seq, u32 change, 1281 unsigned int flags, u32 ext_filter_mask) 1282 { 1283 struct ifinfomsg *ifm; 1284 struct nlmsghdr *nlh; 1285 struct nlattr *af_spec; 1286 struct rtnl_af_ops *af_ops; 1287 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1288 1289 ASSERT_RTNL(); 1290 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1291 if (nlh == NULL) 1292 return -EMSGSIZE; 1293 1294 ifm = nlmsg_data(nlh); 1295 ifm->ifi_family = AF_UNSPEC; 1296 ifm->__ifi_pad = 0; 1297 ifm->ifi_type = dev->type; 1298 ifm->ifi_index = dev->ifindex; 1299 ifm->ifi_flags = dev_get_flags(dev); 1300 ifm->ifi_change = change; 1301 1302 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1303 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1304 nla_put_u8(skb, IFLA_OPERSTATE, 1305 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1306 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1307 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1308 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1309 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1310 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1311 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1312 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1313 #ifdef CONFIG_RPS 1314 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1315 #endif 1316 (dev->ifindex != dev_get_iflink(dev) && 1317 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1318 (upper_dev && 1319 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1320 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1321 (dev->qdisc && 1322 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1323 (dev->ifalias && 1324 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1325 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1326 atomic_read(&dev->carrier_changes)) || 1327 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1328 goto nla_put_failure; 1329 1330 if (rtnl_fill_link_ifmap(skb, dev)) 1331 goto nla_put_failure; 1332 1333 if (dev->addr_len) { 1334 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1335 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1336 goto nla_put_failure; 1337 } 1338 1339 if (rtnl_phys_port_id_fill(skb, dev)) 1340 goto nla_put_failure; 1341 1342 if (rtnl_phys_port_name_fill(skb, dev)) 1343 goto nla_put_failure; 1344 1345 if (rtnl_phys_switch_id_fill(skb, dev)) 1346 goto nla_put_failure; 1347 1348 if (rtnl_fill_stats(skb, dev)) 1349 goto nla_put_failure; 1350 1351 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1352 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1353 goto nla_put_failure; 1354 1355 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1356 ext_filter_mask & RTEXT_FILTER_VF) { 1357 int i; 1358 struct nlattr *vfinfo; 1359 int num_vfs = dev_num_vf(dev->dev.parent); 1360 1361 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1362 if (!vfinfo) 1363 goto nla_put_failure; 1364 for (i = 0; i < num_vfs; i++) { 1365 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1366 goto nla_put_failure; 1367 } 1368 1369 nla_nest_end(skb, vfinfo); 1370 } 1371 1372 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1373 goto nla_put_failure; 1374 1375 if (rtnl_xdp_fill(skb, dev)) 1376 goto nla_put_failure; 1377 1378 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1379 if (rtnl_link_fill(skb, dev) < 0) 1380 goto nla_put_failure; 1381 } 1382 1383 if (dev->rtnl_link_ops && 1384 dev->rtnl_link_ops->get_link_net) { 1385 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1386 1387 if (!net_eq(dev_net(dev), link_net)) { 1388 int id = peernet2id_alloc(dev_net(dev), link_net); 1389 1390 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1391 goto nla_put_failure; 1392 } 1393 } 1394 1395 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1396 goto nla_put_failure; 1397 1398 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1399 if (af_ops->fill_link_af) { 1400 struct nlattr *af; 1401 int err; 1402 1403 if (!(af = nla_nest_start(skb, af_ops->family))) 1404 goto nla_put_failure; 1405 1406 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1407 1408 /* 1409 * Caller may return ENODATA to indicate that there 1410 * was no data to be dumped. This is not an error, it 1411 * means we should trim the attribute header and 1412 * continue. 1413 */ 1414 if (err == -ENODATA) 1415 nla_nest_cancel(skb, af); 1416 else if (err < 0) 1417 goto nla_put_failure; 1418 1419 nla_nest_end(skb, af); 1420 } 1421 } 1422 1423 nla_nest_end(skb, af_spec); 1424 1425 nlmsg_end(skb, nlh); 1426 return 0; 1427 1428 nla_put_failure: 1429 nlmsg_cancel(skb, nlh); 1430 return -EMSGSIZE; 1431 } 1432 1433 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1434 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1435 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1436 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1437 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1438 [IFLA_MTU] = { .type = NLA_U32 }, 1439 [IFLA_LINK] = { .type = NLA_U32 }, 1440 [IFLA_MASTER] = { .type = NLA_U32 }, 1441 [IFLA_CARRIER] = { .type = NLA_U8 }, 1442 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1443 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1444 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1445 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1446 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1447 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1448 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1449 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1450 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1451 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1452 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1453 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1454 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1455 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1456 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1457 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1458 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1459 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1460 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1461 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1462 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1463 [IFLA_XDP] = { .type = NLA_NESTED }, 1464 }; 1465 1466 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1467 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1468 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1469 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1470 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1471 }; 1472 1473 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1474 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1475 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1476 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1477 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1478 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1479 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1480 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1481 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1482 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1483 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1484 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1485 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1486 }; 1487 1488 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1489 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1490 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1491 .len = PORT_PROFILE_MAX }, 1492 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1493 .len = PORT_UUID_MAX }, 1494 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1495 .len = PORT_UUID_MAX }, 1496 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1497 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1498 1499 /* Unused, but we need to keep it here since user space could 1500 * fill it. It's also broken with regard to NLA_BINARY use in 1501 * combination with structs. 1502 */ 1503 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1504 .len = sizeof(struct ifla_port_vsi) }, 1505 }; 1506 1507 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1508 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1509 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1510 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1511 }; 1512 1513 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1514 { 1515 const struct rtnl_link_ops *ops = NULL; 1516 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1517 1518 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, 1519 ifla_info_policy, NULL) < 0) 1520 return NULL; 1521 1522 if (linfo[IFLA_INFO_KIND]) { 1523 char kind[MODULE_NAME_LEN]; 1524 1525 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1526 ops = rtnl_link_ops_get(kind); 1527 } 1528 1529 return ops; 1530 } 1531 1532 static bool link_master_filtered(struct net_device *dev, int master_idx) 1533 { 1534 struct net_device *master; 1535 1536 if (!master_idx) 1537 return false; 1538 1539 master = netdev_master_upper_dev_get(dev); 1540 if (!master || master->ifindex != master_idx) 1541 return true; 1542 1543 return false; 1544 } 1545 1546 static bool link_kind_filtered(const struct net_device *dev, 1547 const struct rtnl_link_ops *kind_ops) 1548 { 1549 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1550 return true; 1551 1552 return false; 1553 } 1554 1555 static bool link_dump_filtered(struct net_device *dev, 1556 int master_idx, 1557 const struct rtnl_link_ops *kind_ops) 1558 { 1559 if (link_master_filtered(dev, master_idx) || 1560 link_kind_filtered(dev, kind_ops)) 1561 return true; 1562 1563 return false; 1564 } 1565 1566 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1567 { 1568 struct net *net = sock_net(skb->sk); 1569 int h, s_h; 1570 int idx = 0, s_idx; 1571 struct net_device *dev; 1572 struct hlist_head *head; 1573 struct nlattr *tb[IFLA_MAX+1]; 1574 u32 ext_filter_mask = 0; 1575 const struct rtnl_link_ops *kind_ops = NULL; 1576 unsigned int flags = NLM_F_MULTI; 1577 int master_idx = 0; 1578 int err; 1579 int hdrlen; 1580 1581 s_h = cb->args[0]; 1582 s_idx = cb->args[1]; 1583 1584 cb->seq = net->dev_base_seq; 1585 1586 /* A hack to preserve kernel<->userspace interface. 1587 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1588 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1589 * what iproute2 < v3.9.0 used. 1590 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1591 * attribute, its netlink message is shorter than struct ifinfomsg. 1592 */ 1593 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1594 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1595 1596 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, 1597 ifla_policy, NULL) >= 0) { 1598 if (tb[IFLA_EXT_MASK]) 1599 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1600 1601 if (tb[IFLA_MASTER]) 1602 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1603 1604 if (tb[IFLA_LINKINFO]) 1605 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1606 1607 if (master_idx || kind_ops) 1608 flags |= NLM_F_DUMP_FILTERED; 1609 } 1610 1611 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1612 idx = 0; 1613 head = &net->dev_index_head[h]; 1614 hlist_for_each_entry(dev, head, index_hlist) { 1615 if (link_dump_filtered(dev, master_idx, kind_ops)) 1616 goto cont; 1617 if (idx < s_idx) 1618 goto cont; 1619 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1620 NETLINK_CB(cb->skb).portid, 1621 cb->nlh->nlmsg_seq, 0, 1622 flags, 1623 ext_filter_mask); 1624 /* If we ran out of room on the first message, 1625 * we're in trouble 1626 */ 1627 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1628 1629 if (err < 0) 1630 goto out; 1631 1632 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1633 cont: 1634 idx++; 1635 } 1636 } 1637 out: 1638 cb->args[1] = idx; 1639 cb->args[0] = h; 1640 1641 return skb->len; 1642 } 1643 1644 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 1645 struct netlink_ext_ack *exterr) 1646 { 1647 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr); 1648 } 1649 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1650 1651 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1652 { 1653 struct net *net; 1654 /* Examine the link attributes and figure out which 1655 * network namespace we are talking about. 1656 */ 1657 if (tb[IFLA_NET_NS_PID]) 1658 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1659 else if (tb[IFLA_NET_NS_FD]) 1660 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1661 else 1662 net = get_net(src_net); 1663 return net; 1664 } 1665 EXPORT_SYMBOL(rtnl_link_get_net); 1666 1667 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1668 { 1669 if (dev) { 1670 if (tb[IFLA_ADDRESS] && 1671 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1672 return -EINVAL; 1673 1674 if (tb[IFLA_BROADCAST] && 1675 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1676 return -EINVAL; 1677 } 1678 1679 if (tb[IFLA_AF_SPEC]) { 1680 struct nlattr *af; 1681 int rem, err; 1682 1683 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1684 const struct rtnl_af_ops *af_ops; 1685 1686 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1687 return -EAFNOSUPPORT; 1688 1689 if (!af_ops->set_link_af) 1690 return -EOPNOTSUPP; 1691 1692 if (af_ops->validate_link_af) { 1693 err = af_ops->validate_link_af(dev, af); 1694 if (err < 0) 1695 return err; 1696 } 1697 } 1698 } 1699 1700 return 0; 1701 } 1702 1703 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1704 int guid_type) 1705 { 1706 const struct net_device_ops *ops = dev->netdev_ops; 1707 1708 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1709 } 1710 1711 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1712 { 1713 if (dev->type != ARPHRD_INFINIBAND) 1714 return -EOPNOTSUPP; 1715 1716 return handle_infiniband_guid(dev, ivt, guid_type); 1717 } 1718 1719 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1720 { 1721 const struct net_device_ops *ops = dev->netdev_ops; 1722 int err = -EINVAL; 1723 1724 if (tb[IFLA_VF_MAC]) { 1725 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1726 1727 err = -EOPNOTSUPP; 1728 if (ops->ndo_set_vf_mac) 1729 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1730 ivm->mac); 1731 if (err < 0) 1732 return err; 1733 } 1734 1735 if (tb[IFLA_VF_VLAN]) { 1736 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1737 1738 err = -EOPNOTSUPP; 1739 if (ops->ndo_set_vf_vlan) 1740 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1741 ivv->qos, 1742 htons(ETH_P_8021Q)); 1743 if (err < 0) 1744 return err; 1745 } 1746 1747 if (tb[IFLA_VF_VLAN_LIST]) { 1748 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 1749 struct nlattr *attr; 1750 int rem, len = 0; 1751 1752 err = -EOPNOTSUPP; 1753 if (!ops->ndo_set_vf_vlan) 1754 return err; 1755 1756 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 1757 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 1758 nla_len(attr) < NLA_HDRLEN) { 1759 return -EINVAL; 1760 } 1761 if (len >= MAX_VLAN_LIST_LEN) 1762 return -EOPNOTSUPP; 1763 ivvl[len] = nla_data(attr); 1764 1765 len++; 1766 } 1767 if (len == 0) 1768 return -EINVAL; 1769 1770 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 1771 ivvl[0]->qos, ivvl[0]->vlan_proto); 1772 if (err < 0) 1773 return err; 1774 } 1775 1776 if (tb[IFLA_VF_TX_RATE]) { 1777 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1778 struct ifla_vf_info ivf; 1779 1780 err = -EOPNOTSUPP; 1781 if (ops->ndo_get_vf_config) 1782 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1783 if (err < 0) 1784 return err; 1785 1786 err = -EOPNOTSUPP; 1787 if (ops->ndo_set_vf_rate) 1788 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1789 ivf.min_tx_rate, 1790 ivt->rate); 1791 if (err < 0) 1792 return err; 1793 } 1794 1795 if (tb[IFLA_VF_RATE]) { 1796 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1797 1798 err = -EOPNOTSUPP; 1799 if (ops->ndo_set_vf_rate) 1800 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1801 ivt->min_tx_rate, 1802 ivt->max_tx_rate); 1803 if (err < 0) 1804 return err; 1805 } 1806 1807 if (tb[IFLA_VF_SPOOFCHK]) { 1808 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1809 1810 err = -EOPNOTSUPP; 1811 if (ops->ndo_set_vf_spoofchk) 1812 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1813 ivs->setting); 1814 if (err < 0) 1815 return err; 1816 } 1817 1818 if (tb[IFLA_VF_LINK_STATE]) { 1819 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1820 1821 err = -EOPNOTSUPP; 1822 if (ops->ndo_set_vf_link_state) 1823 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1824 ivl->link_state); 1825 if (err < 0) 1826 return err; 1827 } 1828 1829 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1830 struct ifla_vf_rss_query_en *ivrssq_en; 1831 1832 err = -EOPNOTSUPP; 1833 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1834 if (ops->ndo_set_vf_rss_query_en) 1835 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1836 ivrssq_en->setting); 1837 if (err < 0) 1838 return err; 1839 } 1840 1841 if (tb[IFLA_VF_TRUST]) { 1842 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1843 1844 err = -EOPNOTSUPP; 1845 if (ops->ndo_set_vf_trust) 1846 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1847 if (err < 0) 1848 return err; 1849 } 1850 1851 if (tb[IFLA_VF_IB_NODE_GUID]) { 1852 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1853 1854 if (!ops->ndo_set_vf_guid) 1855 return -EOPNOTSUPP; 1856 1857 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1858 } 1859 1860 if (tb[IFLA_VF_IB_PORT_GUID]) { 1861 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1862 1863 if (!ops->ndo_set_vf_guid) 1864 return -EOPNOTSUPP; 1865 1866 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1867 } 1868 1869 return err; 1870 } 1871 1872 static int do_set_master(struct net_device *dev, int ifindex) 1873 { 1874 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1875 const struct net_device_ops *ops; 1876 int err; 1877 1878 if (upper_dev) { 1879 if (upper_dev->ifindex == ifindex) 1880 return 0; 1881 ops = upper_dev->netdev_ops; 1882 if (ops->ndo_del_slave) { 1883 err = ops->ndo_del_slave(upper_dev, dev); 1884 if (err) 1885 return err; 1886 } else { 1887 return -EOPNOTSUPP; 1888 } 1889 } 1890 1891 if (ifindex) { 1892 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1893 if (!upper_dev) 1894 return -EINVAL; 1895 ops = upper_dev->netdev_ops; 1896 if (ops->ndo_add_slave) { 1897 err = ops->ndo_add_slave(upper_dev, dev); 1898 if (err) 1899 return err; 1900 } else { 1901 return -EOPNOTSUPP; 1902 } 1903 } 1904 return 0; 1905 } 1906 1907 #define DO_SETLINK_MODIFIED 0x01 1908 /* notify flag means notify + modified. */ 1909 #define DO_SETLINK_NOTIFY 0x03 1910 static int do_setlink(const struct sk_buff *skb, 1911 struct net_device *dev, struct ifinfomsg *ifm, 1912 struct nlattr **tb, char *ifname, int status) 1913 { 1914 const struct net_device_ops *ops = dev->netdev_ops; 1915 int err; 1916 1917 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1918 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1919 if (IS_ERR(net)) { 1920 err = PTR_ERR(net); 1921 goto errout; 1922 } 1923 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1924 put_net(net); 1925 err = -EPERM; 1926 goto errout; 1927 } 1928 err = dev_change_net_namespace(dev, net, ifname); 1929 put_net(net); 1930 if (err) 1931 goto errout; 1932 status |= DO_SETLINK_MODIFIED; 1933 } 1934 1935 if (tb[IFLA_MAP]) { 1936 struct rtnl_link_ifmap *u_map; 1937 struct ifmap k_map; 1938 1939 if (!ops->ndo_set_config) { 1940 err = -EOPNOTSUPP; 1941 goto errout; 1942 } 1943 1944 if (!netif_device_present(dev)) { 1945 err = -ENODEV; 1946 goto errout; 1947 } 1948 1949 u_map = nla_data(tb[IFLA_MAP]); 1950 k_map.mem_start = (unsigned long) u_map->mem_start; 1951 k_map.mem_end = (unsigned long) u_map->mem_end; 1952 k_map.base_addr = (unsigned short) u_map->base_addr; 1953 k_map.irq = (unsigned char) u_map->irq; 1954 k_map.dma = (unsigned char) u_map->dma; 1955 k_map.port = (unsigned char) u_map->port; 1956 1957 err = ops->ndo_set_config(dev, &k_map); 1958 if (err < 0) 1959 goto errout; 1960 1961 status |= DO_SETLINK_NOTIFY; 1962 } 1963 1964 if (tb[IFLA_ADDRESS]) { 1965 struct sockaddr *sa; 1966 int len; 1967 1968 len = sizeof(sa_family_t) + dev->addr_len; 1969 sa = kmalloc(len, GFP_KERNEL); 1970 if (!sa) { 1971 err = -ENOMEM; 1972 goto errout; 1973 } 1974 sa->sa_family = dev->type; 1975 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1976 dev->addr_len); 1977 err = dev_set_mac_address(dev, sa); 1978 kfree(sa); 1979 if (err) 1980 goto errout; 1981 status |= DO_SETLINK_MODIFIED; 1982 } 1983 1984 if (tb[IFLA_MTU]) { 1985 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1986 if (err < 0) 1987 goto errout; 1988 status |= DO_SETLINK_MODIFIED; 1989 } 1990 1991 if (tb[IFLA_GROUP]) { 1992 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1993 status |= DO_SETLINK_NOTIFY; 1994 } 1995 1996 /* 1997 * Interface selected by interface index but interface 1998 * name provided implies that a name change has been 1999 * requested. 2000 */ 2001 if (ifm->ifi_index > 0 && ifname[0]) { 2002 err = dev_change_name(dev, ifname); 2003 if (err < 0) 2004 goto errout; 2005 status |= DO_SETLINK_MODIFIED; 2006 } 2007 2008 if (tb[IFLA_IFALIAS]) { 2009 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2010 nla_len(tb[IFLA_IFALIAS])); 2011 if (err < 0) 2012 goto errout; 2013 status |= DO_SETLINK_NOTIFY; 2014 } 2015 2016 if (tb[IFLA_BROADCAST]) { 2017 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2018 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2019 } 2020 2021 if (ifm->ifi_flags || ifm->ifi_change) { 2022 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2023 if (err < 0) 2024 goto errout; 2025 } 2026 2027 if (tb[IFLA_MASTER]) { 2028 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2029 if (err) 2030 goto errout; 2031 status |= DO_SETLINK_MODIFIED; 2032 } 2033 2034 if (tb[IFLA_CARRIER]) { 2035 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2036 if (err) 2037 goto errout; 2038 status |= DO_SETLINK_MODIFIED; 2039 } 2040 2041 if (tb[IFLA_TXQLEN]) { 2042 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 2043 unsigned long orig_len = dev->tx_queue_len; 2044 2045 if (dev->tx_queue_len ^ value) { 2046 dev->tx_queue_len = value; 2047 err = call_netdevice_notifiers( 2048 NETDEV_CHANGE_TX_QUEUE_LEN, dev); 2049 err = notifier_to_errno(err); 2050 if (err) { 2051 dev->tx_queue_len = orig_len; 2052 goto errout; 2053 } 2054 status |= DO_SETLINK_NOTIFY; 2055 } 2056 } 2057 2058 if (tb[IFLA_OPERSTATE]) 2059 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2060 2061 if (tb[IFLA_LINKMODE]) { 2062 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2063 2064 write_lock_bh(&dev_base_lock); 2065 if (dev->link_mode ^ value) 2066 status |= DO_SETLINK_NOTIFY; 2067 dev->link_mode = value; 2068 write_unlock_bh(&dev_base_lock); 2069 } 2070 2071 if (tb[IFLA_VFINFO_LIST]) { 2072 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2073 struct nlattr *attr; 2074 int rem; 2075 2076 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2077 if (nla_type(attr) != IFLA_VF_INFO || 2078 nla_len(attr) < NLA_HDRLEN) { 2079 err = -EINVAL; 2080 goto errout; 2081 } 2082 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 2083 ifla_vf_policy, NULL); 2084 if (err < 0) 2085 goto errout; 2086 err = do_setvfinfo(dev, vfinfo); 2087 if (err < 0) 2088 goto errout; 2089 status |= DO_SETLINK_NOTIFY; 2090 } 2091 } 2092 err = 0; 2093 2094 if (tb[IFLA_VF_PORTS]) { 2095 struct nlattr *port[IFLA_PORT_MAX+1]; 2096 struct nlattr *attr; 2097 int vf; 2098 int rem; 2099 2100 err = -EOPNOTSUPP; 2101 if (!ops->ndo_set_vf_port) 2102 goto errout; 2103 2104 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2105 if (nla_type(attr) != IFLA_VF_PORT || 2106 nla_len(attr) < NLA_HDRLEN) { 2107 err = -EINVAL; 2108 goto errout; 2109 } 2110 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 2111 ifla_port_policy, NULL); 2112 if (err < 0) 2113 goto errout; 2114 if (!port[IFLA_PORT_VF]) { 2115 err = -EOPNOTSUPP; 2116 goto errout; 2117 } 2118 vf = nla_get_u32(port[IFLA_PORT_VF]); 2119 err = ops->ndo_set_vf_port(dev, vf, port); 2120 if (err < 0) 2121 goto errout; 2122 status |= DO_SETLINK_NOTIFY; 2123 } 2124 } 2125 err = 0; 2126 2127 if (tb[IFLA_PORT_SELF]) { 2128 struct nlattr *port[IFLA_PORT_MAX+1]; 2129 2130 err = nla_parse_nested(port, IFLA_PORT_MAX, 2131 tb[IFLA_PORT_SELF], ifla_port_policy, 2132 NULL); 2133 if (err < 0) 2134 goto errout; 2135 2136 err = -EOPNOTSUPP; 2137 if (ops->ndo_set_vf_port) 2138 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2139 if (err < 0) 2140 goto errout; 2141 status |= DO_SETLINK_NOTIFY; 2142 } 2143 2144 if (tb[IFLA_AF_SPEC]) { 2145 struct nlattr *af; 2146 int rem; 2147 2148 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2149 const struct rtnl_af_ops *af_ops; 2150 2151 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2152 BUG(); 2153 2154 err = af_ops->set_link_af(dev, af); 2155 if (err < 0) 2156 goto errout; 2157 2158 status |= DO_SETLINK_NOTIFY; 2159 } 2160 } 2161 err = 0; 2162 2163 if (tb[IFLA_PROTO_DOWN]) { 2164 err = dev_change_proto_down(dev, 2165 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2166 if (err) 2167 goto errout; 2168 status |= DO_SETLINK_NOTIFY; 2169 } 2170 2171 if (tb[IFLA_XDP]) { 2172 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2173 u32 xdp_flags = 0; 2174 2175 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2176 ifla_xdp_policy, NULL); 2177 if (err < 0) 2178 goto errout; 2179 2180 if (xdp[IFLA_XDP_ATTACHED]) { 2181 err = -EINVAL; 2182 goto errout; 2183 } 2184 2185 if (xdp[IFLA_XDP_FLAGS]) { 2186 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2187 if (xdp_flags & ~XDP_FLAGS_MASK) { 2188 err = -EINVAL; 2189 goto errout; 2190 } 2191 } 2192 2193 if (xdp[IFLA_XDP_FD]) { 2194 err = dev_change_xdp_fd(dev, 2195 nla_get_s32(xdp[IFLA_XDP_FD]), 2196 xdp_flags); 2197 if (err) 2198 goto errout; 2199 status |= DO_SETLINK_NOTIFY; 2200 } 2201 } 2202 2203 errout: 2204 if (status & DO_SETLINK_MODIFIED) { 2205 if (status & DO_SETLINK_NOTIFY) 2206 netdev_state_change(dev); 2207 2208 if (err < 0) 2209 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", 2210 dev->name); 2211 } 2212 2213 return err; 2214 } 2215 2216 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2217 { 2218 struct net *net = sock_net(skb->sk); 2219 struct ifinfomsg *ifm; 2220 struct net_device *dev; 2221 int err; 2222 struct nlattr *tb[IFLA_MAX+1]; 2223 char ifname[IFNAMSIZ]; 2224 2225 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, NULL); 2226 if (err < 0) 2227 goto errout; 2228 2229 if (tb[IFLA_IFNAME]) 2230 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2231 else 2232 ifname[0] = '\0'; 2233 2234 err = -EINVAL; 2235 ifm = nlmsg_data(nlh); 2236 if (ifm->ifi_index > 0) 2237 dev = __dev_get_by_index(net, ifm->ifi_index); 2238 else if (tb[IFLA_IFNAME]) 2239 dev = __dev_get_by_name(net, ifname); 2240 else 2241 goto errout; 2242 2243 if (dev == NULL) { 2244 err = -ENODEV; 2245 goto errout; 2246 } 2247 2248 err = validate_linkmsg(dev, tb); 2249 if (err < 0) 2250 goto errout; 2251 2252 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 2253 errout: 2254 return err; 2255 } 2256 2257 static int rtnl_group_dellink(const struct net *net, int group) 2258 { 2259 struct net_device *dev, *aux; 2260 LIST_HEAD(list_kill); 2261 bool found = false; 2262 2263 if (!group) 2264 return -EPERM; 2265 2266 for_each_netdev(net, dev) { 2267 if (dev->group == group) { 2268 const struct rtnl_link_ops *ops; 2269 2270 found = true; 2271 ops = dev->rtnl_link_ops; 2272 if (!ops || !ops->dellink) 2273 return -EOPNOTSUPP; 2274 } 2275 } 2276 2277 if (!found) 2278 return -ENODEV; 2279 2280 for_each_netdev_safe(net, dev, aux) { 2281 if (dev->group == group) { 2282 const struct rtnl_link_ops *ops; 2283 2284 ops = dev->rtnl_link_ops; 2285 ops->dellink(dev, &list_kill); 2286 } 2287 } 2288 unregister_netdevice_many(&list_kill); 2289 2290 return 0; 2291 } 2292 2293 int rtnl_delete_link(struct net_device *dev) 2294 { 2295 const struct rtnl_link_ops *ops; 2296 LIST_HEAD(list_kill); 2297 2298 ops = dev->rtnl_link_ops; 2299 if (!ops || !ops->dellink) 2300 return -EOPNOTSUPP; 2301 2302 ops->dellink(dev, &list_kill); 2303 unregister_netdevice_many(&list_kill); 2304 2305 return 0; 2306 } 2307 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2308 2309 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2310 { 2311 struct net *net = sock_net(skb->sk); 2312 struct net_device *dev; 2313 struct ifinfomsg *ifm; 2314 char ifname[IFNAMSIZ]; 2315 struct nlattr *tb[IFLA_MAX+1]; 2316 int err; 2317 2318 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, NULL); 2319 if (err < 0) 2320 return err; 2321 2322 if (tb[IFLA_IFNAME]) 2323 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2324 2325 ifm = nlmsg_data(nlh); 2326 if (ifm->ifi_index > 0) 2327 dev = __dev_get_by_index(net, ifm->ifi_index); 2328 else if (tb[IFLA_IFNAME]) 2329 dev = __dev_get_by_name(net, ifname); 2330 else if (tb[IFLA_GROUP]) 2331 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2332 else 2333 return -EINVAL; 2334 2335 if (!dev) 2336 return -ENODEV; 2337 2338 return rtnl_delete_link(dev); 2339 } 2340 2341 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2342 { 2343 unsigned int old_flags; 2344 int err; 2345 2346 old_flags = dev->flags; 2347 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2348 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2349 if (err < 0) 2350 return err; 2351 } 2352 2353 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2354 2355 __dev_notify_flags(dev, old_flags, ~0U); 2356 return 0; 2357 } 2358 EXPORT_SYMBOL(rtnl_configure_link); 2359 2360 struct net_device *rtnl_create_link(struct net *net, 2361 const char *ifname, unsigned char name_assign_type, 2362 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2363 { 2364 struct net_device *dev; 2365 unsigned int num_tx_queues = 1; 2366 unsigned int num_rx_queues = 1; 2367 2368 if (tb[IFLA_NUM_TX_QUEUES]) 2369 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2370 else if (ops->get_num_tx_queues) 2371 num_tx_queues = ops->get_num_tx_queues(); 2372 2373 if (tb[IFLA_NUM_RX_QUEUES]) 2374 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2375 else if (ops->get_num_rx_queues) 2376 num_rx_queues = ops->get_num_rx_queues(); 2377 2378 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2379 ops->setup, num_tx_queues, num_rx_queues); 2380 if (!dev) 2381 return ERR_PTR(-ENOMEM); 2382 2383 dev_net_set(dev, net); 2384 dev->rtnl_link_ops = ops; 2385 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2386 2387 if (tb[IFLA_MTU]) 2388 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2389 if (tb[IFLA_ADDRESS]) { 2390 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2391 nla_len(tb[IFLA_ADDRESS])); 2392 dev->addr_assign_type = NET_ADDR_SET; 2393 } 2394 if (tb[IFLA_BROADCAST]) 2395 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2396 nla_len(tb[IFLA_BROADCAST])); 2397 if (tb[IFLA_TXQLEN]) 2398 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2399 if (tb[IFLA_OPERSTATE]) 2400 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2401 if (tb[IFLA_LINKMODE]) 2402 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2403 if (tb[IFLA_GROUP]) 2404 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2405 2406 return dev; 2407 } 2408 EXPORT_SYMBOL(rtnl_create_link); 2409 2410 static int rtnl_group_changelink(const struct sk_buff *skb, 2411 struct net *net, int group, 2412 struct ifinfomsg *ifm, 2413 struct nlattr **tb) 2414 { 2415 struct net_device *dev, *aux; 2416 int err; 2417 2418 for_each_netdev_safe(net, dev, aux) { 2419 if (dev->group == group) { 2420 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2421 if (err < 0) 2422 return err; 2423 } 2424 } 2425 2426 return 0; 2427 } 2428 2429 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2430 { 2431 struct net *net = sock_net(skb->sk); 2432 const struct rtnl_link_ops *ops; 2433 const struct rtnl_link_ops *m_ops = NULL; 2434 struct net_device *dev; 2435 struct net_device *master_dev = NULL; 2436 struct ifinfomsg *ifm; 2437 char kind[MODULE_NAME_LEN]; 2438 char ifname[IFNAMSIZ]; 2439 struct nlattr *tb[IFLA_MAX+1]; 2440 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2441 unsigned char name_assign_type = NET_NAME_USER; 2442 int err; 2443 2444 #ifdef CONFIG_MODULES 2445 replay: 2446 #endif 2447 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, NULL); 2448 if (err < 0) 2449 return err; 2450 2451 if (tb[IFLA_IFNAME]) 2452 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2453 else 2454 ifname[0] = '\0'; 2455 2456 ifm = nlmsg_data(nlh); 2457 if (ifm->ifi_index > 0) 2458 dev = __dev_get_by_index(net, ifm->ifi_index); 2459 else { 2460 if (ifname[0]) 2461 dev = __dev_get_by_name(net, ifname); 2462 else 2463 dev = NULL; 2464 } 2465 2466 if (dev) { 2467 master_dev = netdev_master_upper_dev_get(dev); 2468 if (master_dev) 2469 m_ops = master_dev->rtnl_link_ops; 2470 } 2471 2472 err = validate_linkmsg(dev, tb); 2473 if (err < 0) 2474 return err; 2475 2476 if (tb[IFLA_LINKINFO]) { 2477 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2478 tb[IFLA_LINKINFO], ifla_info_policy, 2479 NULL); 2480 if (err < 0) 2481 return err; 2482 } else 2483 memset(linkinfo, 0, sizeof(linkinfo)); 2484 2485 if (linkinfo[IFLA_INFO_KIND]) { 2486 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2487 ops = rtnl_link_ops_get(kind); 2488 } else { 2489 kind[0] = '\0'; 2490 ops = NULL; 2491 } 2492 2493 if (1) { 2494 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2495 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2496 struct nlattr **data = NULL; 2497 struct nlattr **slave_data = NULL; 2498 struct net *dest_net, *link_net = NULL; 2499 2500 if (ops) { 2501 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2502 err = nla_parse_nested(attr, ops->maxtype, 2503 linkinfo[IFLA_INFO_DATA], 2504 ops->policy, NULL); 2505 if (err < 0) 2506 return err; 2507 data = attr; 2508 } 2509 if (ops->validate) { 2510 err = ops->validate(tb, data); 2511 if (err < 0) 2512 return err; 2513 } 2514 } 2515 2516 if (m_ops) { 2517 if (m_ops->slave_maxtype && 2518 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2519 err = nla_parse_nested(slave_attr, 2520 m_ops->slave_maxtype, 2521 linkinfo[IFLA_INFO_SLAVE_DATA], 2522 m_ops->slave_policy, 2523 NULL); 2524 if (err < 0) 2525 return err; 2526 slave_data = slave_attr; 2527 } 2528 if (m_ops->slave_validate) { 2529 err = m_ops->slave_validate(tb, slave_data); 2530 if (err < 0) 2531 return err; 2532 } 2533 } 2534 2535 if (dev) { 2536 int status = 0; 2537 2538 if (nlh->nlmsg_flags & NLM_F_EXCL) 2539 return -EEXIST; 2540 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2541 return -EOPNOTSUPP; 2542 2543 if (linkinfo[IFLA_INFO_DATA]) { 2544 if (!ops || ops != dev->rtnl_link_ops || 2545 !ops->changelink) 2546 return -EOPNOTSUPP; 2547 2548 err = ops->changelink(dev, tb, data); 2549 if (err < 0) 2550 return err; 2551 status |= DO_SETLINK_NOTIFY; 2552 } 2553 2554 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2555 if (!m_ops || !m_ops->slave_changelink) 2556 return -EOPNOTSUPP; 2557 2558 err = m_ops->slave_changelink(master_dev, dev, 2559 tb, slave_data); 2560 if (err < 0) 2561 return err; 2562 status |= DO_SETLINK_NOTIFY; 2563 } 2564 2565 return do_setlink(skb, dev, ifm, tb, ifname, status); 2566 } 2567 2568 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2569 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2570 return rtnl_group_changelink(skb, net, 2571 nla_get_u32(tb[IFLA_GROUP]), 2572 ifm, tb); 2573 return -ENODEV; 2574 } 2575 2576 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 2577 return -EOPNOTSUPP; 2578 2579 if (!ops) { 2580 #ifdef CONFIG_MODULES 2581 if (kind[0]) { 2582 __rtnl_unlock(); 2583 request_module("rtnl-link-%s", kind); 2584 rtnl_lock(); 2585 ops = rtnl_link_ops_get(kind); 2586 if (ops) 2587 goto replay; 2588 } 2589 #endif 2590 return -EOPNOTSUPP; 2591 } 2592 2593 if (!ops->setup) 2594 return -EOPNOTSUPP; 2595 2596 if (!ifname[0]) { 2597 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2598 name_assign_type = NET_NAME_ENUM; 2599 } 2600 2601 dest_net = rtnl_link_get_net(net, tb); 2602 if (IS_ERR(dest_net)) 2603 return PTR_ERR(dest_net); 2604 2605 err = -EPERM; 2606 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2607 goto out; 2608 2609 if (tb[IFLA_LINK_NETNSID]) { 2610 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2611 2612 link_net = get_net_ns_by_id(dest_net, id); 2613 if (!link_net) { 2614 err = -EINVAL; 2615 goto out; 2616 } 2617 err = -EPERM; 2618 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2619 goto out; 2620 } 2621 2622 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2623 name_assign_type, ops, tb); 2624 if (IS_ERR(dev)) { 2625 err = PTR_ERR(dev); 2626 goto out; 2627 } 2628 2629 dev->ifindex = ifm->ifi_index; 2630 2631 if (ops->newlink) { 2632 err = ops->newlink(link_net ? : net, dev, tb, data); 2633 /* Drivers should call free_netdev() in ->destructor 2634 * and unregister it on failure after registration 2635 * so that device could be finally freed in rtnl_unlock. 2636 */ 2637 if (err < 0) { 2638 /* If device is not registered at all, free it now */ 2639 if (dev->reg_state == NETREG_UNINITIALIZED) 2640 free_netdev(dev); 2641 goto out; 2642 } 2643 } else { 2644 err = register_netdevice(dev); 2645 if (err < 0) { 2646 free_netdev(dev); 2647 goto out; 2648 } 2649 } 2650 err = rtnl_configure_link(dev, ifm); 2651 if (err < 0) 2652 goto out_unregister; 2653 if (link_net) { 2654 err = dev_change_net_namespace(dev, dest_net, ifname); 2655 if (err < 0) 2656 goto out_unregister; 2657 } 2658 if (tb[IFLA_MASTER]) { 2659 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2660 if (err) 2661 goto out_unregister; 2662 } 2663 out: 2664 if (link_net) 2665 put_net(link_net); 2666 put_net(dest_net); 2667 return err; 2668 out_unregister: 2669 if (ops->newlink) { 2670 LIST_HEAD(list_kill); 2671 2672 ops->dellink(dev, &list_kill); 2673 unregister_netdevice_many(&list_kill); 2674 } else { 2675 unregister_netdevice(dev); 2676 } 2677 goto out; 2678 } 2679 } 2680 2681 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2682 { 2683 struct net *net = sock_net(skb->sk); 2684 struct ifinfomsg *ifm; 2685 char ifname[IFNAMSIZ]; 2686 struct nlattr *tb[IFLA_MAX+1]; 2687 struct net_device *dev = NULL; 2688 struct sk_buff *nskb; 2689 int err; 2690 u32 ext_filter_mask = 0; 2691 2692 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, NULL); 2693 if (err < 0) 2694 return err; 2695 2696 if (tb[IFLA_IFNAME]) 2697 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2698 2699 if (tb[IFLA_EXT_MASK]) 2700 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2701 2702 ifm = nlmsg_data(nlh); 2703 if (ifm->ifi_index > 0) 2704 dev = __dev_get_by_index(net, ifm->ifi_index); 2705 else if (tb[IFLA_IFNAME]) 2706 dev = __dev_get_by_name(net, ifname); 2707 else 2708 return -EINVAL; 2709 2710 if (dev == NULL) 2711 return -ENODEV; 2712 2713 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2714 if (nskb == NULL) 2715 return -ENOBUFS; 2716 2717 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2718 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2719 if (err < 0) { 2720 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2721 WARN_ON(err == -EMSGSIZE); 2722 kfree_skb(nskb); 2723 } else 2724 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2725 2726 return err; 2727 } 2728 2729 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2730 { 2731 struct net *net = sock_net(skb->sk); 2732 struct net_device *dev; 2733 struct nlattr *tb[IFLA_MAX+1]; 2734 u32 ext_filter_mask = 0; 2735 u16 min_ifinfo_dump_size = 0; 2736 int hdrlen; 2737 2738 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2739 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2740 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2741 2742 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { 2743 if (tb[IFLA_EXT_MASK]) 2744 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2745 } 2746 2747 if (!ext_filter_mask) 2748 return NLMSG_GOODSIZE; 2749 /* 2750 * traverse the list of net devices and compute the minimum 2751 * buffer size based upon the filter mask. 2752 */ 2753 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2754 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2755 if_nlmsg_size(dev, 2756 ext_filter_mask)); 2757 } 2758 2759 return nlmsg_total_size(min_ifinfo_dump_size); 2760 } 2761 2762 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2763 { 2764 int idx; 2765 int s_idx = cb->family; 2766 2767 if (s_idx == 0) 2768 s_idx = 1; 2769 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2770 int type = cb->nlh->nlmsg_type-RTM_BASE; 2771 if (idx < s_idx || idx == PF_PACKET) 2772 continue; 2773 if (rtnl_msg_handlers[idx] == NULL || 2774 rtnl_msg_handlers[idx][type].dumpit == NULL) 2775 continue; 2776 if (idx > s_idx) { 2777 memset(&cb->args[0], 0, sizeof(cb->args)); 2778 cb->prev_seq = 0; 2779 cb->seq = 0; 2780 } 2781 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2782 break; 2783 } 2784 cb->family = idx; 2785 2786 return skb->len; 2787 } 2788 2789 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2790 unsigned int change, gfp_t flags) 2791 { 2792 struct net *net = dev_net(dev); 2793 struct sk_buff *skb; 2794 int err = -ENOBUFS; 2795 size_t if_info_size; 2796 2797 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2798 if (skb == NULL) 2799 goto errout; 2800 2801 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2802 if (err < 0) { 2803 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2804 WARN_ON(err == -EMSGSIZE); 2805 kfree_skb(skb); 2806 goto errout; 2807 } 2808 return skb; 2809 errout: 2810 if (err < 0) 2811 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2812 return NULL; 2813 } 2814 2815 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2816 { 2817 struct net *net = dev_net(dev); 2818 2819 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2820 } 2821 2822 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2823 gfp_t flags) 2824 { 2825 struct sk_buff *skb; 2826 2827 if (dev->reg_state != NETREG_REGISTERED) 2828 return; 2829 2830 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2831 if (skb) 2832 rtmsg_ifinfo_send(skb, dev, flags); 2833 } 2834 EXPORT_SYMBOL(rtmsg_ifinfo); 2835 2836 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2837 struct net_device *dev, 2838 u8 *addr, u16 vid, u32 pid, u32 seq, 2839 int type, unsigned int flags, 2840 int nlflags, u16 ndm_state) 2841 { 2842 struct nlmsghdr *nlh; 2843 struct ndmsg *ndm; 2844 2845 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2846 if (!nlh) 2847 return -EMSGSIZE; 2848 2849 ndm = nlmsg_data(nlh); 2850 ndm->ndm_family = AF_BRIDGE; 2851 ndm->ndm_pad1 = 0; 2852 ndm->ndm_pad2 = 0; 2853 ndm->ndm_flags = flags; 2854 ndm->ndm_type = 0; 2855 ndm->ndm_ifindex = dev->ifindex; 2856 ndm->ndm_state = ndm_state; 2857 2858 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2859 goto nla_put_failure; 2860 if (vid) 2861 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2862 goto nla_put_failure; 2863 2864 nlmsg_end(skb, nlh); 2865 return 0; 2866 2867 nla_put_failure: 2868 nlmsg_cancel(skb, nlh); 2869 return -EMSGSIZE; 2870 } 2871 2872 static inline size_t rtnl_fdb_nlmsg_size(void) 2873 { 2874 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 2875 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 2876 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 2877 0; 2878 } 2879 2880 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2881 u16 ndm_state) 2882 { 2883 struct net *net = dev_net(dev); 2884 struct sk_buff *skb; 2885 int err = -ENOBUFS; 2886 2887 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2888 if (!skb) 2889 goto errout; 2890 2891 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2892 0, 0, type, NTF_SELF, 0, ndm_state); 2893 if (err < 0) { 2894 kfree_skb(skb); 2895 goto errout; 2896 } 2897 2898 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2899 return; 2900 errout: 2901 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2902 } 2903 2904 /** 2905 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2906 */ 2907 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2908 struct nlattr *tb[], 2909 struct net_device *dev, 2910 const unsigned char *addr, u16 vid, 2911 u16 flags) 2912 { 2913 int err = -EINVAL; 2914 2915 /* If aging addresses are supported device will need to 2916 * implement its own handler for this. 2917 */ 2918 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2919 pr_info("%s: FDB only supports static addresses\n", dev->name); 2920 return err; 2921 } 2922 2923 if (vid) { 2924 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2925 return err; 2926 } 2927 2928 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2929 err = dev_uc_add_excl(dev, addr); 2930 else if (is_multicast_ether_addr(addr)) 2931 err = dev_mc_add_excl(dev, addr); 2932 2933 /* Only return duplicate errors if NLM_F_EXCL is set */ 2934 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2935 err = 0; 2936 2937 return err; 2938 } 2939 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2940 2941 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2942 { 2943 u16 vid = 0; 2944 2945 if (vlan_attr) { 2946 if (nla_len(vlan_attr) != sizeof(u16)) { 2947 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2948 return -EINVAL; 2949 } 2950 2951 vid = nla_get_u16(vlan_attr); 2952 2953 if (!vid || vid >= VLAN_VID_MASK) { 2954 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2955 vid); 2956 return -EINVAL; 2957 } 2958 } 2959 *p_vid = vid; 2960 return 0; 2961 } 2962 2963 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2964 { 2965 struct net *net = sock_net(skb->sk); 2966 struct ndmsg *ndm; 2967 struct nlattr *tb[NDA_MAX+1]; 2968 struct net_device *dev; 2969 u8 *addr; 2970 u16 vid; 2971 int err; 2972 2973 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, NULL); 2974 if (err < 0) 2975 return err; 2976 2977 ndm = nlmsg_data(nlh); 2978 if (ndm->ndm_ifindex == 0) { 2979 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2980 return -EINVAL; 2981 } 2982 2983 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2984 if (dev == NULL) { 2985 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2986 return -ENODEV; 2987 } 2988 2989 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2990 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2991 return -EINVAL; 2992 } 2993 2994 addr = nla_data(tb[NDA_LLADDR]); 2995 2996 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2997 if (err) 2998 return err; 2999 3000 err = -EOPNOTSUPP; 3001 3002 /* Support fdb on master device the net/bridge default case */ 3003 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3004 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3005 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3006 const struct net_device_ops *ops = br_dev->netdev_ops; 3007 3008 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 3009 nlh->nlmsg_flags); 3010 if (err) 3011 goto out; 3012 else 3013 ndm->ndm_flags &= ~NTF_MASTER; 3014 } 3015 3016 /* Embedded bridge, macvlan, and any other device support */ 3017 if ((ndm->ndm_flags & NTF_SELF)) { 3018 if (dev->netdev_ops->ndo_fdb_add) 3019 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 3020 vid, 3021 nlh->nlmsg_flags); 3022 else 3023 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 3024 nlh->nlmsg_flags); 3025 3026 if (!err) { 3027 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3028 ndm->ndm_state); 3029 ndm->ndm_flags &= ~NTF_SELF; 3030 } 3031 } 3032 out: 3033 return err; 3034 } 3035 3036 /** 3037 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3038 */ 3039 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3040 struct nlattr *tb[], 3041 struct net_device *dev, 3042 const unsigned char *addr, u16 vid) 3043 { 3044 int err = -EINVAL; 3045 3046 /* If aging addresses are supported device will need to 3047 * implement its own handler for this. 3048 */ 3049 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3050 pr_info("%s: FDB only supports static addresses\n", dev->name); 3051 return err; 3052 } 3053 3054 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3055 err = dev_uc_del(dev, addr); 3056 else if (is_multicast_ether_addr(addr)) 3057 err = dev_mc_del(dev, addr); 3058 3059 return err; 3060 } 3061 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3062 3063 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 3064 { 3065 struct net *net = sock_net(skb->sk); 3066 struct ndmsg *ndm; 3067 struct nlattr *tb[NDA_MAX+1]; 3068 struct net_device *dev; 3069 int err = -EINVAL; 3070 __u8 *addr; 3071 u16 vid; 3072 3073 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3074 return -EPERM; 3075 3076 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, NULL); 3077 if (err < 0) 3078 return err; 3079 3080 ndm = nlmsg_data(nlh); 3081 if (ndm->ndm_ifindex == 0) { 3082 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 3083 return -EINVAL; 3084 } 3085 3086 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3087 if (dev == NULL) { 3088 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 3089 return -ENODEV; 3090 } 3091 3092 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3093 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 3094 return -EINVAL; 3095 } 3096 3097 addr = nla_data(tb[NDA_LLADDR]); 3098 3099 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 3100 if (err) 3101 return err; 3102 3103 err = -EOPNOTSUPP; 3104 3105 /* Support fdb on master device the net/bridge default case */ 3106 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3107 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3108 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3109 const struct net_device_ops *ops = br_dev->netdev_ops; 3110 3111 if (ops->ndo_fdb_del) 3112 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3113 3114 if (err) 3115 goto out; 3116 else 3117 ndm->ndm_flags &= ~NTF_MASTER; 3118 } 3119 3120 /* Embedded bridge, macvlan, and any other device support */ 3121 if (ndm->ndm_flags & NTF_SELF) { 3122 if (dev->netdev_ops->ndo_fdb_del) 3123 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3124 vid); 3125 else 3126 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3127 3128 if (!err) { 3129 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3130 ndm->ndm_state); 3131 ndm->ndm_flags &= ~NTF_SELF; 3132 } 3133 } 3134 out: 3135 return err; 3136 } 3137 3138 static int nlmsg_populate_fdb(struct sk_buff *skb, 3139 struct netlink_callback *cb, 3140 struct net_device *dev, 3141 int *idx, 3142 struct netdev_hw_addr_list *list) 3143 { 3144 struct netdev_hw_addr *ha; 3145 int err; 3146 u32 portid, seq; 3147 3148 portid = NETLINK_CB(cb->skb).portid; 3149 seq = cb->nlh->nlmsg_seq; 3150 3151 list_for_each_entry(ha, &list->list, list) { 3152 if (*idx < cb->args[2]) 3153 goto skip; 3154 3155 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3156 portid, seq, 3157 RTM_NEWNEIGH, NTF_SELF, 3158 NLM_F_MULTI, NUD_PERMANENT); 3159 if (err < 0) 3160 return err; 3161 skip: 3162 *idx += 1; 3163 } 3164 return 0; 3165 } 3166 3167 /** 3168 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3169 * @nlh: netlink message header 3170 * @dev: netdevice 3171 * 3172 * Default netdevice operation to dump the existing unicast address list. 3173 * Returns number of addresses from list put in skb. 3174 */ 3175 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3176 struct netlink_callback *cb, 3177 struct net_device *dev, 3178 struct net_device *filter_dev, 3179 int *idx) 3180 { 3181 int err; 3182 3183 netif_addr_lock_bh(dev); 3184 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3185 if (err) 3186 goto out; 3187 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3188 out: 3189 netif_addr_unlock_bh(dev); 3190 return err; 3191 } 3192 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3193 3194 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3195 { 3196 struct net_device *dev; 3197 struct nlattr *tb[IFLA_MAX+1]; 3198 struct net_device *br_dev = NULL; 3199 const struct net_device_ops *ops = NULL; 3200 const struct net_device_ops *cops = NULL; 3201 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3202 struct net *net = sock_net(skb->sk); 3203 struct hlist_head *head; 3204 int brport_idx = 0; 3205 int br_idx = 0; 3206 int h, s_h; 3207 int idx = 0, s_idx; 3208 int err = 0; 3209 int fidx = 0; 3210 3211 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, 3212 IFLA_MAX, ifla_policy, NULL) == 0) { 3213 if (tb[IFLA_MASTER]) 3214 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3215 } 3216 3217 brport_idx = ifm->ifi_index; 3218 3219 if (br_idx) { 3220 br_dev = __dev_get_by_index(net, br_idx); 3221 if (!br_dev) 3222 return -ENODEV; 3223 3224 ops = br_dev->netdev_ops; 3225 } 3226 3227 s_h = cb->args[0]; 3228 s_idx = cb->args[1]; 3229 3230 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3231 idx = 0; 3232 head = &net->dev_index_head[h]; 3233 hlist_for_each_entry(dev, head, index_hlist) { 3234 3235 if (brport_idx && (dev->ifindex != brport_idx)) 3236 continue; 3237 3238 if (!br_idx) { /* user did not specify a specific bridge */ 3239 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3240 br_dev = netdev_master_upper_dev_get(dev); 3241 cops = br_dev->netdev_ops; 3242 } 3243 } else { 3244 if (dev != br_dev && 3245 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3246 continue; 3247 3248 if (br_dev != netdev_master_upper_dev_get(dev) && 3249 !(dev->priv_flags & IFF_EBRIDGE)) 3250 continue; 3251 cops = ops; 3252 } 3253 3254 if (idx < s_idx) 3255 goto cont; 3256 3257 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3258 if (cops && cops->ndo_fdb_dump) { 3259 err = cops->ndo_fdb_dump(skb, cb, 3260 br_dev, dev, 3261 &fidx); 3262 if (err == -EMSGSIZE) 3263 goto out; 3264 } 3265 } 3266 3267 if (dev->netdev_ops->ndo_fdb_dump) 3268 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3269 dev, NULL, 3270 &fidx); 3271 else 3272 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3273 &fidx); 3274 if (err == -EMSGSIZE) 3275 goto out; 3276 3277 cops = NULL; 3278 3279 /* reset fdb offset to 0 for rest of the interfaces */ 3280 cb->args[2] = 0; 3281 fidx = 0; 3282 cont: 3283 idx++; 3284 } 3285 } 3286 3287 out: 3288 cb->args[0] = h; 3289 cb->args[1] = idx; 3290 cb->args[2] = fidx; 3291 3292 return skb->len; 3293 } 3294 3295 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3296 unsigned int attrnum, unsigned int flag) 3297 { 3298 if (mask & flag) 3299 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3300 return 0; 3301 } 3302 3303 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3304 struct net_device *dev, u16 mode, 3305 u32 flags, u32 mask, int nlflags, 3306 u32 filter_mask, 3307 int (*vlan_fill)(struct sk_buff *skb, 3308 struct net_device *dev, 3309 u32 filter_mask)) 3310 { 3311 struct nlmsghdr *nlh; 3312 struct ifinfomsg *ifm; 3313 struct nlattr *br_afspec; 3314 struct nlattr *protinfo; 3315 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3316 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3317 int err = 0; 3318 3319 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3320 if (nlh == NULL) 3321 return -EMSGSIZE; 3322 3323 ifm = nlmsg_data(nlh); 3324 ifm->ifi_family = AF_BRIDGE; 3325 ifm->__ifi_pad = 0; 3326 ifm->ifi_type = dev->type; 3327 ifm->ifi_index = dev->ifindex; 3328 ifm->ifi_flags = dev_get_flags(dev); 3329 ifm->ifi_change = 0; 3330 3331 3332 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3333 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3334 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3335 (br_dev && 3336 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3337 (dev->addr_len && 3338 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3339 (dev->ifindex != dev_get_iflink(dev) && 3340 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3341 goto nla_put_failure; 3342 3343 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3344 if (!br_afspec) 3345 goto nla_put_failure; 3346 3347 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3348 nla_nest_cancel(skb, br_afspec); 3349 goto nla_put_failure; 3350 } 3351 3352 if (mode != BRIDGE_MODE_UNDEF) { 3353 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3354 nla_nest_cancel(skb, br_afspec); 3355 goto nla_put_failure; 3356 } 3357 } 3358 if (vlan_fill) { 3359 err = vlan_fill(skb, dev, filter_mask); 3360 if (err) { 3361 nla_nest_cancel(skb, br_afspec); 3362 goto nla_put_failure; 3363 } 3364 } 3365 nla_nest_end(skb, br_afspec); 3366 3367 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3368 if (!protinfo) 3369 goto nla_put_failure; 3370 3371 if (brport_nla_put_flag(skb, flags, mask, 3372 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3373 brport_nla_put_flag(skb, flags, mask, 3374 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3375 brport_nla_put_flag(skb, flags, mask, 3376 IFLA_BRPORT_FAST_LEAVE, 3377 BR_MULTICAST_FAST_LEAVE) || 3378 brport_nla_put_flag(skb, flags, mask, 3379 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3380 brport_nla_put_flag(skb, flags, mask, 3381 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3382 brport_nla_put_flag(skb, flags, mask, 3383 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3384 brport_nla_put_flag(skb, flags, mask, 3385 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3386 brport_nla_put_flag(skb, flags, mask, 3387 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3388 nla_nest_cancel(skb, protinfo); 3389 goto nla_put_failure; 3390 } 3391 3392 nla_nest_end(skb, protinfo); 3393 3394 nlmsg_end(skb, nlh); 3395 return 0; 3396 nla_put_failure: 3397 nlmsg_cancel(skb, nlh); 3398 return err ? err : -EMSGSIZE; 3399 } 3400 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3401 3402 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3403 { 3404 struct net *net = sock_net(skb->sk); 3405 struct net_device *dev; 3406 int idx = 0; 3407 u32 portid = NETLINK_CB(cb->skb).portid; 3408 u32 seq = cb->nlh->nlmsg_seq; 3409 u32 filter_mask = 0; 3410 int err; 3411 3412 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3413 struct nlattr *extfilt; 3414 3415 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3416 IFLA_EXT_MASK); 3417 if (extfilt) { 3418 if (nla_len(extfilt) < sizeof(filter_mask)) 3419 return -EINVAL; 3420 3421 filter_mask = nla_get_u32(extfilt); 3422 } 3423 } 3424 3425 rcu_read_lock(); 3426 for_each_netdev_rcu(net, dev) { 3427 const struct net_device_ops *ops = dev->netdev_ops; 3428 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3429 3430 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3431 if (idx >= cb->args[0]) { 3432 err = br_dev->netdev_ops->ndo_bridge_getlink( 3433 skb, portid, seq, dev, 3434 filter_mask, NLM_F_MULTI); 3435 if (err < 0 && err != -EOPNOTSUPP) 3436 break; 3437 } 3438 idx++; 3439 } 3440 3441 if (ops->ndo_bridge_getlink) { 3442 if (idx >= cb->args[0]) { 3443 err = ops->ndo_bridge_getlink(skb, portid, 3444 seq, dev, 3445 filter_mask, 3446 NLM_F_MULTI); 3447 if (err < 0 && err != -EOPNOTSUPP) 3448 break; 3449 } 3450 idx++; 3451 } 3452 } 3453 rcu_read_unlock(); 3454 cb->args[0] = idx; 3455 3456 return skb->len; 3457 } 3458 3459 static inline size_t bridge_nlmsg_size(void) 3460 { 3461 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3462 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3463 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3464 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3465 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3466 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3467 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3468 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3469 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3470 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3471 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3472 } 3473 3474 static int rtnl_bridge_notify(struct net_device *dev) 3475 { 3476 struct net *net = dev_net(dev); 3477 struct sk_buff *skb; 3478 int err = -EOPNOTSUPP; 3479 3480 if (!dev->netdev_ops->ndo_bridge_getlink) 3481 return 0; 3482 3483 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3484 if (!skb) { 3485 err = -ENOMEM; 3486 goto errout; 3487 } 3488 3489 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3490 if (err < 0) 3491 goto errout; 3492 3493 if (!skb->len) 3494 goto errout; 3495 3496 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3497 return 0; 3498 errout: 3499 WARN_ON(err == -EMSGSIZE); 3500 kfree_skb(skb); 3501 if (err) 3502 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3503 return err; 3504 } 3505 3506 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3507 { 3508 struct net *net = sock_net(skb->sk); 3509 struct ifinfomsg *ifm; 3510 struct net_device *dev; 3511 struct nlattr *br_spec, *attr = NULL; 3512 int rem, err = -EOPNOTSUPP; 3513 u16 flags = 0; 3514 bool have_flags = false; 3515 3516 if (nlmsg_len(nlh) < sizeof(*ifm)) 3517 return -EINVAL; 3518 3519 ifm = nlmsg_data(nlh); 3520 if (ifm->ifi_family != AF_BRIDGE) 3521 return -EPFNOSUPPORT; 3522 3523 dev = __dev_get_by_index(net, ifm->ifi_index); 3524 if (!dev) { 3525 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3526 return -ENODEV; 3527 } 3528 3529 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3530 if (br_spec) { 3531 nla_for_each_nested(attr, br_spec, rem) { 3532 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3533 if (nla_len(attr) < sizeof(flags)) 3534 return -EINVAL; 3535 3536 have_flags = true; 3537 flags = nla_get_u16(attr); 3538 break; 3539 } 3540 } 3541 } 3542 3543 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3544 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3545 3546 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3547 err = -EOPNOTSUPP; 3548 goto out; 3549 } 3550 3551 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3552 if (err) 3553 goto out; 3554 3555 flags &= ~BRIDGE_FLAGS_MASTER; 3556 } 3557 3558 if ((flags & BRIDGE_FLAGS_SELF)) { 3559 if (!dev->netdev_ops->ndo_bridge_setlink) 3560 err = -EOPNOTSUPP; 3561 else 3562 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3563 flags); 3564 if (!err) { 3565 flags &= ~BRIDGE_FLAGS_SELF; 3566 3567 /* Generate event to notify upper layer of bridge 3568 * change 3569 */ 3570 err = rtnl_bridge_notify(dev); 3571 } 3572 } 3573 3574 if (have_flags) 3575 memcpy(nla_data(attr), &flags, sizeof(flags)); 3576 out: 3577 return err; 3578 } 3579 3580 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3581 { 3582 struct net *net = sock_net(skb->sk); 3583 struct ifinfomsg *ifm; 3584 struct net_device *dev; 3585 struct nlattr *br_spec, *attr = NULL; 3586 int rem, err = -EOPNOTSUPP; 3587 u16 flags = 0; 3588 bool have_flags = false; 3589 3590 if (nlmsg_len(nlh) < sizeof(*ifm)) 3591 return -EINVAL; 3592 3593 ifm = nlmsg_data(nlh); 3594 if (ifm->ifi_family != AF_BRIDGE) 3595 return -EPFNOSUPPORT; 3596 3597 dev = __dev_get_by_index(net, ifm->ifi_index); 3598 if (!dev) { 3599 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3600 return -ENODEV; 3601 } 3602 3603 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3604 if (br_spec) { 3605 nla_for_each_nested(attr, br_spec, rem) { 3606 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3607 if (nla_len(attr) < sizeof(flags)) 3608 return -EINVAL; 3609 3610 have_flags = true; 3611 flags = nla_get_u16(attr); 3612 break; 3613 } 3614 } 3615 } 3616 3617 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3618 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3619 3620 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3621 err = -EOPNOTSUPP; 3622 goto out; 3623 } 3624 3625 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3626 if (err) 3627 goto out; 3628 3629 flags &= ~BRIDGE_FLAGS_MASTER; 3630 } 3631 3632 if ((flags & BRIDGE_FLAGS_SELF)) { 3633 if (!dev->netdev_ops->ndo_bridge_dellink) 3634 err = -EOPNOTSUPP; 3635 else 3636 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3637 flags); 3638 3639 if (!err) { 3640 flags &= ~BRIDGE_FLAGS_SELF; 3641 3642 /* Generate event to notify upper layer of bridge 3643 * change 3644 */ 3645 err = rtnl_bridge_notify(dev); 3646 } 3647 } 3648 3649 if (have_flags) 3650 memcpy(nla_data(attr), &flags, sizeof(flags)); 3651 out: 3652 return err; 3653 } 3654 3655 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3656 { 3657 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3658 (!idxattr || idxattr == attrid); 3659 } 3660 3661 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3662 static int rtnl_get_offload_stats_attr_size(int attr_id) 3663 { 3664 switch (attr_id) { 3665 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3666 return sizeof(struct rtnl_link_stats64); 3667 } 3668 3669 return 0; 3670 } 3671 3672 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3673 int *prividx) 3674 { 3675 struct nlattr *attr = NULL; 3676 int attr_id, size; 3677 void *attr_data; 3678 int err; 3679 3680 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3681 dev->netdev_ops->ndo_get_offload_stats)) 3682 return -ENODATA; 3683 3684 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3685 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3686 if (attr_id < *prividx) 3687 continue; 3688 3689 size = rtnl_get_offload_stats_attr_size(attr_id); 3690 if (!size) 3691 continue; 3692 3693 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3694 continue; 3695 3696 attr = nla_reserve_64bit(skb, attr_id, size, 3697 IFLA_OFFLOAD_XSTATS_UNSPEC); 3698 if (!attr) 3699 goto nla_put_failure; 3700 3701 attr_data = nla_data(attr); 3702 memset(attr_data, 0, size); 3703 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3704 attr_data); 3705 if (err) 3706 goto get_offload_stats_failure; 3707 } 3708 3709 if (!attr) 3710 return -ENODATA; 3711 3712 *prividx = 0; 3713 return 0; 3714 3715 nla_put_failure: 3716 err = -EMSGSIZE; 3717 get_offload_stats_failure: 3718 *prividx = attr_id; 3719 return err; 3720 } 3721 3722 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3723 { 3724 int nla_size = 0; 3725 int attr_id; 3726 int size; 3727 3728 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3729 dev->netdev_ops->ndo_get_offload_stats)) 3730 return 0; 3731 3732 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3733 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3734 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3735 continue; 3736 size = rtnl_get_offload_stats_attr_size(attr_id); 3737 nla_size += nla_total_size_64bit(size); 3738 } 3739 3740 if (nla_size != 0) 3741 nla_size += nla_total_size(0); 3742 3743 return nla_size; 3744 } 3745 3746 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3747 int type, u32 pid, u32 seq, u32 change, 3748 unsigned int flags, unsigned int filter_mask, 3749 int *idxattr, int *prividx) 3750 { 3751 struct if_stats_msg *ifsm; 3752 struct nlmsghdr *nlh; 3753 struct nlattr *attr; 3754 int s_prividx = *prividx; 3755 int err; 3756 3757 ASSERT_RTNL(); 3758 3759 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3760 if (!nlh) 3761 return -EMSGSIZE; 3762 3763 ifsm = nlmsg_data(nlh); 3764 ifsm->ifindex = dev->ifindex; 3765 ifsm->filter_mask = filter_mask; 3766 3767 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3768 struct rtnl_link_stats64 *sp; 3769 3770 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3771 sizeof(struct rtnl_link_stats64), 3772 IFLA_STATS_UNSPEC); 3773 if (!attr) 3774 goto nla_put_failure; 3775 3776 sp = nla_data(attr); 3777 dev_get_stats(dev, sp); 3778 } 3779 3780 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3781 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3782 3783 if (ops && ops->fill_linkxstats) { 3784 *idxattr = IFLA_STATS_LINK_XSTATS; 3785 attr = nla_nest_start(skb, 3786 IFLA_STATS_LINK_XSTATS); 3787 if (!attr) 3788 goto nla_put_failure; 3789 3790 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3791 nla_nest_end(skb, attr); 3792 if (err) 3793 goto nla_put_failure; 3794 *idxattr = 0; 3795 } 3796 } 3797 3798 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3799 *idxattr)) { 3800 const struct rtnl_link_ops *ops = NULL; 3801 const struct net_device *master; 3802 3803 master = netdev_master_upper_dev_get(dev); 3804 if (master) 3805 ops = master->rtnl_link_ops; 3806 if (ops && ops->fill_linkxstats) { 3807 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3808 attr = nla_nest_start(skb, 3809 IFLA_STATS_LINK_XSTATS_SLAVE); 3810 if (!attr) 3811 goto nla_put_failure; 3812 3813 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3814 nla_nest_end(skb, attr); 3815 if (err) 3816 goto nla_put_failure; 3817 *idxattr = 0; 3818 } 3819 } 3820 3821 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 3822 *idxattr)) { 3823 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 3824 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 3825 if (!attr) 3826 goto nla_put_failure; 3827 3828 err = rtnl_get_offload_stats(skb, dev, prividx); 3829 if (err == -ENODATA) 3830 nla_nest_cancel(skb, attr); 3831 else 3832 nla_nest_end(skb, attr); 3833 3834 if (err && err != -ENODATA) 3835 goto nla_put_failure; 3836 *idxattr = 0; 3837 } 3838 3839 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 3840 struct rtnl_af_ops *af_ops; 3841 3842 *idxattr = IFLA_STATS_AF_SPEC; 3843 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC); 3844 if (!attr) 3845 goto nla_put_failure; 3846 3847 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3848 if (af_ops->fill_stats_af) { 3849 struct nlattr *af; 3850 int err; 3851 3852 af = nla_nest_start(skb, af_ops->family); 3853 if (!af) 3854 goto nla_put_failure; 3855 3856 err = af_ops->fill_stats_af(skb, dev); 3857 3858 if (err == -ENODATA) 3859 nla_nest_cancel(skb, af); 3860 else if (err < 0) 3861 goto nla_put_failure; 3862 3863 nla_nest_end(skb, af); 3864 } 3865 } 3866 3867 nla_nest_end(skb, attr); 3868 3869 *idxattr = 0; 3870 } 3871 3872 nlmsg_end(skb, nlh); 3873 3874 return 0; 3875 3876 nla_put_failure: 3877 /* not a multi message or no progress mean a real error */ 3878 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 3879 nlmsg_cancel(skb, nlh); 3880 else 3881 nlmsg_end(skb, nlh); 3882 3883 return -EMSGSIZE; 3884 } 3885 3886 static size_t if_nlmsg_stats_size(const struct net_device *dev, 3887 u32 filter_mask) 3888 { 3889 size_t size = 0; 3890 3891 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 3892 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 3893 3894 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 3895 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3896 int attr = IFLA_STATS_LINK_XSTATS; 3897 3898 if (ops && ops->get_linkxstats_size) { 3899 size += nla_total_size(ops->get_linkxstats_size(dev, 3900 attr)); 3901 /* for IFLA_STATS_LINK_XSTATS */ 3902 size += nla_total_size(0); 3903 } 3904 } 3905 3906 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 3907 struct net_device *_dev = (struct net_device *)dev; 3908 const struct rtnl_link_ops *ops = NULL; 3909 const struct net_device *master; 3910 3911 /* netdev_master_upper_dev_get can't take const */ 3912 master = netdev_master_upper_dev_get(_dev); 3913 if (master) 3914 ops = master->rtnl_link_ops; 3915 if (ops && ops->get_linkxstats_size) { 3916 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 3917 3918 size += nla_total_size(ops->get_linkxstats_size(dev, 3919 attr)); 3920 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 3921 size += nla_total_size(0); 3922 } 3923 } 3924 3925 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 3926 size += rtnl_get_offload_stats_size(dev); 3927 3928 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 3929 struct rtnl_af_ops *af_ops; 3930 3931 /* for IFLA_STATS_AF_SPEC */ 3932 size += nla_total_size(0); 3933 3934 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3935 if (af_ops->get_stats_af_size) { 3936 size += nla_total_size( 3937 af_ops->get_stats_af_size(dev)); 3938 3939 /* for AF_* */ 3940 size += nla_total_size(0); 3941 } 3942 } 3943 } 3944 3945 return size; 3946 } 3947 3948 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh) 3949 { 3950 struct net *net = sock_net(skb->sk); 3951 struct net_device *dev = NULL; 3952 int idxattr = 0, prividx = 0; 3953 struct if_stats_msg *ifsm; 3954 struct sk_buff *nskb; 3955 u32 filter_mask; 3956 int err; 3957 3958 if (nlmsg_len(nlh) < sizeof(*ifsm)) 3959 return -EINVAL; 3960 3961 ifsm = nlmsg_data(nlh); 3962 if (ifsm->ifindex > 0) 3963 dev = __dev_get_by_index(net, ifsm->ifindex); 3964 else 3965 return -EINVAL; 3966 3967 if (!dev) 3968 return -ENODEV; 3969 3970 filter_mask = ifsm->filter_mask; 3971 if (!filter_mask) 3972 return -EINVAL; 3973 3974 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 3975 if (!nskb) 3976 return -ENOBUFS; 3977 3978 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 3979 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 3980 0, filter_mask, &idxattr, &prividx); 3981 if (err < 0) { 3982 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 3983 WARN_ON(err == -EMSGSIZE); 3984 kfree_skb(nskb); 3985 } else { 3986 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3987 } 3988 3989 return err; 3990 } 3991 3992 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 3993 { 3994 int h, s_h, err, s_idx, s_idxattr, s_prividx; 3995 struct net *net = sock_net(skb->sk); 3996 unsigned int flags = NLM_F_MULTI; 3997 struct if_stats_msg *ifsm; 3998 struct hlist_head *head; 3999 struct net_device *dev; 4000 u32 filter_mask = 0; 4001 int idx = 0; 4002 4003 s_h = cb->args[0]; 4004 s_idx = cb->args[1]; 4005 s_idxattr = cb->args[2]; 4006 s_prividx = cb->args[3]; 4007 4008 cb->seq = net->dev_base_seq; 4009 4010 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) 4011 return -EINVAL; 4012 4013 ifsm = nlmsg_data(cb->nlh); 4014 filter_mask = ifsm->filter_mask; 4015 if (!filter_mask) 4016 return -EINVAL; 4017 4018 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4019 idx = 0; 4020 head = &net->dev_index_head[h]; 4021 hlist_for_each_entry(dev, head, index_hlist) { 4022 if (idx < s_idx) 4023 goto cont; 4024 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 4025 NETLINK_CB(cb->skb).portid, 4026 cb->nlh->nlmsg_seq, 0, 4027 flags, filter_mask, 4028 &s_idxattr, &s_prividx); 4029 /* If we ran out of room on the first message, 4030 * we're in trouble 4031 */ 4032 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 4033 4034 if (err < 0) 4035 goto out; 4036 s_prividx = 0; 4037 s_idxattr = 0; 4038 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 4039 cont: 4040 idx++; 4041 } 4042 } 4043 out: 4044 cb->args[3] = s_prividx; 4045 cb->args[2] = s_idxattr; 4046 cb->args[1] = idx; 4047 cb->args[0] = h; 4048 4049 return skb->len; 4050 } 4051 4052 /* Process one rtnetlink message. */ 4053 4054 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 4055 struct netlink_ext_ack *extack) 4056 { 4057 struct net *net = sock_net(skb->sk); 4058 rtnl_doit_func doit; 4059 int kind; 4060 int family; 4061 int type; 4062 int err; 4063 4064 type = nlh->nlmsg_type; 4065 if (type > RTM_MAX) 4066 return -EOPNOTSUPP; 4067 4068 type -= RTM_BASE; 4069 4070 /* All the messages must have at least 1 byte length */ 4071 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 4072 return 0; 4073 4074 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 4075 kind = type&3; 4076 4077 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 4078 return -EPERM; 4079 4080 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 4081 struct sock *rtnl; 4082 rtnl_dumpit_func dumpit; 4083 rtnl_calcit_func calcit; 4084 u16 min_dump_alloc = 0; 4085 4086 dumpit = rtnl_get_dumpit(family, type); 4087 if (dumpit == NULL) 4088 return -EOPNOTSUPP; 4089 calcit = rtnl_get_calcit(family, type); 4090 if (calcit) 4091 min_dump_alloc = calcit(skb, nlh); 4092 4093 __rtnl_unlock(); 4094 rtnl = net->rtnl; 4095 { 4096 struct netlink_dump_control c = { 4097 .dump = dumpit, 4098 .min_dump_alloc = min_dump_alloc, 4099 }; 4100 err = netlink_dump_start(rtnl, skb, nlh, &c); 4101 } 4102 rtnl_lock(); 4103 return err; 4104 } 4105 4106 doit = rtnl_get_doit(family, type); 4107 if (doit == NULL) 4108 return -EOPNOTSUPP; 4109 4110 return doit(skb, nlh); 4111 } 4112 4113 static void rtnetlink_rcv(struct sk_buff *skb) 4114 { 4115 rtnl_lock(); 4116 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4117 rtnl_unlock(); 4118 } 4119 4120 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4121 { 4122 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4123 4124 switch (event) { 4125 case NETDEV_REBOOT: 4126 case NETDEV_CHANGENAME: 4127 case NETDEV_FEAT_CHANGE: 4128 case NETDEV_BONDING_FAILOVER: 4129 case NETDEV_NOTIFY_PEERS: 4130 case NETDEV_RESEND_IGMP: 4131 case NETDEV_CHANGEINFODATA: 4132 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 4133 break; 4134 default: 4135 break; 4136 } 4137 return NOTIFY_DONE; 4138 } 4139 4140 static struct notifier_block rtnetlink_dev_notifier = { 4141 .notifier_call = rtnetlink_event, 4142 }; 4143 4144 4145 static int __net_init rtnetlink_net_init(struct net *net) 4146 { 4147 struct sock *sk; 4148 struct netlink_kernel_cfg cfg = { 4149 .groups = RTNLGRP_MAX, 4150 .input = rtnetlink_rcv, 4151 .cb_mutex = &rtnl_mutex, 4152 .flags = NL_CFG_F_NONROOT_RECV, 4153 }; 4154 4155 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4156 if (!sk) 4157 return -ENOMEM; 4158 net->rtnl = sk; 4159 return 0; 4160 } 4161 4162 static void __net_exit rtnetlink_net_exit(struct net *net) 4163 { 4164 netlink_kernel_release(net->rtnl); 4165 net->rtnl = NULL; 4166 } 4167 4168 static struct pernet_operations rtnetlink_net_ops = { 4169 .init = rtnetlink_net_init, 4170 .exit = rtnetlink_net_exit, 4171 }; 4172 4173 void __init rtnetlink_init(void) 4174 { 4175 if (register_pernet_subsys(&rtnetlink_net_ops)) 4176 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4177 4178 register_netdevice_notifier(&rtnetlink_dev_notifier); 4179 4180 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4181 rtnl_dump_ifinfo, rtnl_calcit); 4182 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 4183 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 4184 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 4185 4186 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 4187 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 4188 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL); 4189 4190 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 4191 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 4192 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 4193 4194 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 4195 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 4196 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 4197 4198 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4199 NULL); 4200 } 4201