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(void) 900 { 901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ 902 nla_total_size(1); /* XDP_ATTACHED */ 903 904 return xdp_size; 905 } 906 907 static noinline size_t if_nlmsg_size(const struct net_device *dev, 908 u32 ext_filter_mask) 909 { 910 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 911 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 912 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 913 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 914 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 915 + nla_total_size(sizeof(struct rtnl_link_stats)) 916 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 917 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 918 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 919 + nla_total_size(4) /* IFLA_TXQLEN */ 920 + nla_total_size(4) /* IFLA_WEIGHT */ 921 + nla_total_size(4) /* IFLA_MTU */ 922 + nla_total_size(4) /* IFLA_LINK */ 923 + nla_total_size(4) /* IFLA_MASTER */ 924 + nla_total_size(1) /* IFLA_CARRIER */ 925 + nla_total_size(4) /* IFLA_PROMISCUITY */ 926 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 927 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 928 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 929 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 930 + nla_total_size(1) /* IFLA_OPERSTATE */ 931 + nla_total_size(1) /* IFLA_LINKMODE */ 932 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 933 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 934 + nla_total_size(ext_filter_mask 935 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 936 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 937 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 938 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 939 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 940 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 941 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 942 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 943 + rtnl_xdp_size() /* IFLA_XDP */ 944 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 945 946 } 947 948 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 949 { 950 struct nlattr *vf_ports; 951 struct nlattr *vf_port; 952 int vf; 953 int err; 954 955 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 956 if (!vf_ports) 957 return -EMSGSIZE; 958 959 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 960 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 961 if (!vf_port) 962 goto nla_put_failure; 963 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 964 goto nla_put_failure; 965 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 966 if (err == -EMSGSIZE) 967 goto nla_put_failure; 968 if (err) { 969 nla_nest_cancel(skb, vf_port); 970 continue; 971 } 972 nla_nest_end(skb, vf_port); 973 } 974 975 nla_nest_end(skb, vf_ports); 976 977 return 0; 978 979 nla_put_failure: 980 nla_nest_cancel(skb, vf_ports); 981 return -EMSGSIZE; 982 } 983 984 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 985 { 986 struct nlattr *port_self; 987 int err; 988 989 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 990 if (!port_self) 991 return -EMSGSIZE; 992 993 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 994 if (err) { 995 nla_nest_cancel(skb, port_self); 996 return (err == -EMSGSIZE) ? err : 0; 997 } 998 999 nla_nest_end(skb, port_self); 1000 1001 return 0; 1002 } 1003 1004 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1005 u32 ext_filter_mask) 1006 { 1007 int err; 1008 1009 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1010 !(ext_filter_mask & RTEXT_FILTER_VF)) 1011 return 0; 1012 1013 err = rtnl_port_self_fill(skb, dev); 1014 if (err) 1015 return err; 1016 1017 if (dev_num_vf(dev->dev.parent)) { 1018 err = rtnl_vf_ports_fill(skb, dev); 1019 if (err) 1020 return err; 1021 } 1022 1023 return 0; 1024 } 1025 1026 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1027 { 1028 int err; 1029 struct netdev_phys_item_id ppid; 1030 1031 err = dev_get_phys_port_id(dev, &ppid); 1032 if (err) { 1033 if (err == -EOPNOTSUPP) 1034 return 0; 1035 return err; 1036 } 1037 1038 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1039 return -EMSGSIZE; 1040 1041 return 0; 1042 } 1043 1044 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1045 { 1046 char name[IFNAMSIZ]; 1047 int err; 1048 1049 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1050 if (err) { 1051 if (err == -EOPNOTSUPP) 1052 return 0; 1053 return err; 1054 } 1055 1056 if (nla_put_string(skb, IFLA_PHYS_PORT_NAME, name)) 1057 return -EMSGSIZE; 1058 1059 return 0; 1060 } 1061 1062 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1063 { 1064 int err; 1065 struct switchdev_attr attr = { 1066 .orig_dev = dev, 1067 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1068 .flags = SWITCHDEV_F_NO_RECURSE, 1069 }; 1070 1071 err = switchdev_port_attr_get(dev, &attr); 1072 if (err) { 1073 if (err == -EOPNOTSUPP) 1074 return 0; 1075 return err; 1076 } 1077 1078 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1079 attr.u.ppid.id)) 1080 return -EMSGSIZE; 1081 1082 return 0; 1083 } 1084 1085 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1086 struct net_device *dev) 1087 { 1088 struct rtnl_link_stats64 *sp; 1089 struct nlattr *attr; 1090 1091 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1092 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1093 if (!attr) 1094 return -EMSGSIZE; 1095 1096 sp = nla_data(attr); 1097 dev_get_stats(dev, sp); 1098 1099 attr = nla_reserve(skb, IFLA_STATS, 1100 sizeof(struct rtnl_link_stats)); 1101 if (!attr) 1102 return -EMSGSIZE; 1103 1104 copy_rtnl_link_stats(nla_data(attr), sp); 1105 1106 return 0; 1107 } 1108 1109 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1110 struct net_device *dev, 1111 int vfs_num, 1112 struct nlattr *vfinfo) 1113 { 1114 struct ifla_vf_rss_query_en vf_rss_query_en; 1115 struct nlattr *vf, *vfstats, *vfvlanlist; 1116 struct ifla_vf_link_state vf_linkstate; 1117 struct ifla_vf_vlan_info vf_vlan_info; 1118 struct ifla_vf_spoofchk vf_spoofchk; 1119 struct ifla_vf_tx_rate vf_tx_rate; 1120 struct ifla_vf_stats vf_stats; 1121 struct ifla_vf_trust vf_trust; 1122 struct ifla_vf_vlan vf_vlan; 1123 struct ifla_vf_rate vf_rate; 1124 struct ifla_vf_mac vf_mac; 1125 struct ifla_vf_info ivi; 1126 1127 /* Not all SR-IOV capable drivers support the 1128 * spoofcheck and "RSS query enable" query. Preset to 1129 * -1 so the user space tool can detect that the driver 1130 * didn't report anything. 1131 */ 1132 ivi.spoofchk = -1; 1133 ivi.rss_query_en = -1; 1134 ivi.trusted = -1; 1135 memset(ivi.mac, 0, sizeof(ivi.mac)); 1136 /* The default value for VF link state is "auto" 1137 * IFLA_VF_LINK_STATE_AUTO which equals zero 1138 */ 1139 ivi.linkstate = 0; 1140 /* VLAN Protocol by default is 802.1Q */ 1141 ivi.vlan_proto = htons(ETH_P_8021Q); 1142 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1143 return 0; 1144 1145 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1146 1147 vf_mac.vf = 1148 vf_vlan.vf = 1149 vf_vlan_info.vf = 1150 vf_rate.vf = 1151 vf_tx_rate.vf = 1152 vf_spoofchk.vf = 1153 vf_linkstate.vf = 1154 vf_rss_query_en.vf = 1155 vf_trust.vf = ivi.vf; 1156 1157 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1158 vf_vlan.vlan = ivi.vlan; 1159 vf_vlan.qos = ivi.qos; 1160 vf_vlan_info.vlan = ivi.vlan; 1161 vf_vlan_info.qos = ivi.qos; 1162 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1163 vf_tx_rate.rate = ivi.max_tx_rate; 1164 vf_rate.min_tx_rate = ivi.min_tx_rate; 1165 vf_rate.max_tx_rate = ivi.max_tx_rate; 1166 vf_spoofchk.setting = ivi.spoofchk; 1167 vf_linkstate.link_state = ivi.linkstate; 1168 vf_rss_query_en.setting = ivi.rss_query_en; 1169 vf_trust.setting = ivi.trusted; 1170 vf = nla_nest_start(skb, IFLA_VF_INFO); 1171 if (!vf) 1172 goto nla_put_vfinfo_failure; 1173 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1174 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1175 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1176 &vf_rate) || 1177 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1178 &vf_tx_rate) || 1179 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1180 &vf_spoofchk) || 1181 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1182 &vf_linkstate) || 1183 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1184 sizeof(vf_rss_query_en), 1185 &vf_rss_query_en) || 1186 nla_put(skb, IFLA_VF_TRUST, 1187 sizeof(vf_trust), &vf_trust)) 1188 goto nla_put_vf_failure; 1189 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST); 1190 if (!vfvlanlist) 1191 goto nla_put_vf_failure; 1192 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1193 &vf_vlan_info)) { 1194 nla_nest_cancel(skb, vfvlanlist); 1195 goto nla_put_vf_failure; 1196 } 1197 nla_nest_end(skb, vfvlanlist); 1198 memset(&vf_stats, 0, sizeof(vf_stats)); 1199 if (dev->netdev_ops->ndo_get_vf_stats) 1200 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1201 &vf_stats); 1202 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1203 if (!vfstats) 1204 goto nla_put_vf_failure; 1205 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1206 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1207 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1208 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1209 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1210 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1211 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1212 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1214 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1216 vf_stats.multicast, IFLA_VF_STATS_PAD)) { 1217 nla_nest_cancel(skb, vfstats); 1218 goto nla_put_vf_failure; 1219 } 1220 nla_nest_end(skb, vfstats); 1221 nla_nest_end(skb, vf); 1222 return 0; 1223 1224 nla_put_vf_failure: 1225 nla_nest_cancel(skb, vf); 1226 nla_put_vfinfo_failure: 1227 nla_nest_cancel(skb, vfinfo); 1228 return -EMSGSIZE; 1229 } 1230 1231 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1232 { 1233 struct rtnl_link_ifmap map; 1234 1235 memset(&map, 0, sizeof(map)); 1236 map.mem_start = dev->mem_start; 1237 map.mem_end = dev->mem_end; 1238 map.base_addr = dev->base_addr; 1239 map.irq = dev->irq; 1240 map.dma = dev->dma; 1241 map.port = dev->if_port; 1242 1243 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1244 return -EMSGSIZE; 1245 1246 return 0; 1247 } 1248 1249 static u8 rtnl_xdp_attached_mode(struct net_device *dev) 1250 { 1251 const struct net_device_ops *ops = dev->netdev_ops; 1252 1253 ASSERT_RTNL(); 1254 1255 if (rcu_access_pointer(dev->xdp_prog)) 1256 return XDP_ATTACHED_SKB; 1257 if (ops->ndo_xdp && __dev_xdp_attached(dev, ops->ndo_xdp)) 1258 return XDP_ATTACHED_DRV; 1259 1260 return XDP_ATTACHED_NONE; 1261 } 1262 1263 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1264 { 1265 struct nlattr *xdp; 1266 int err; 1267 1268 xdp = nla_nest_start(skb, IFLA_XDP); 1269 if (!xdp) 1270 return -EMSGSIZE; 1271 1272 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, 1273 rtnl_xdp_attached_mode(dev)); 1274 if (err) 1275 goto err_cancel; 1276 1277 nla_nest_end(skb, xdp); 1278 return 0; 1279 1280 err_cancel: 1281 nla_nest_cancel(skb, xdp); 1282 return err; 1283 } 1284 1285 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1286 int type, u32 pid, u32 seq, u32 change, 1287 unsigned int flags, u32 ext_filter_mask) 1288 { 1289 struct ifinfomsg *ifm; 1290 struct nlmsghdr *nlh; 1291 struct nlattr *af_spec; 1292 struct rtnl_af_ops *af_ops; 1293 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1294 1295 ASSERT_RTNL(); 1296 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1297 if (nlh == NULL) 1298 return -EMSGSIZE; 1299 1300 ifm = nlmsg_data(nlh); 1301 ifm->ifi_family = AF_UNSPEC; 1302 ifm->__ifi_pad = 0; 1303 ifm->ifi_type = dev->type; 1304 ifm->ifi_index = dev->ifindex; 1305 ifm->ifi_flags = dev_get_flags(dev); 1306 ifm->ifi_change = change; 1307 1308 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1309 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1310 nla_put_u8(skb, IFLA_OPERSTATE, 1311 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1312 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1313 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1314 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1315 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1316 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1317 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1318 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1319 #ifdef CONFIG_RPS 1320 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1321 #endif 1322 (dev->ifindex != dev_get_iflink(dev) && 1323 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1324 (upper_dev && 1325 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1326 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1327 (dev->qdisc && 1328 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1329 (dev->ifalias && 1330 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1331 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1332 atomic_read(&dev->carrier_changes)) || 1333 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1334 goto nla_put_failure; 1335 1336 if (rtnl_fill_link_ifmap(skb, dev)) 1337 goto nla_put_failure; 1338 1339 if (dev->addr_len) { 1340 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1341 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1342 goto nla_put_failure; 1343 } 1344 1345 if (rtnl_phys_port_id_fill(skb, dev)) 1346 goto nla_put_failure; 1347 1348 if (rtnl_phys_port_name_fill(skb, dev)) 1349 goto nla_put_failure; 1350 1351 if (rtnl_phys_switch_id_fill(skb, dev)) 1352 goto nla_put_failure; 1353 1354 if (rtnl_fill_stats(skb, dev)) 1355 goto nla_put_failure; 1356 1357 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1358 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1359 goto nla_put_failure; 1360 1361 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1362 ext_filter_mask & RTEXT_FILTER_VF) { 1363 int i; 1364 struct nlattr *vfinfo; 1365 int num_vfs = dev_num_vf(dev->dev.parent); 1366 1367 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1368 if (!vfinfo) 1369 goto nla_put_failure; 1370 for (i = 0; i < num_vfs; i++) { 1371 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1372 goto nla_put_failure; 1373 } 1374 1375 nla_nest_end(skb, vfinfo); 1376 } 1377 1378 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1379 goto nla_put_failure; 1380 1381 if (rtnl_xdp_fill(skb, dev)) 1382 goto nla_put_failure; 1383 1384 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1385 if (rtnl_link_fill(skb, dev) < 0) 1386 goto nla_put_failure; 1387 } 1388 1389 if (dev->rtnl_link_ops && 1390 dev->rtnl_link_ops->get_link_net) { 1391 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1392 1393 if (!net_eq(dev_net(dev), link_net)) { 1394 int id = peernet2id_alloc(dev_net(dev), link_net); 1395 1396 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1397 goto nla_put_failure; 1398 } 1399 } 1400 1401 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1402 goto nla_put_failure; 1403 1404 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1405 if (af_ops->fill_link_af) { 1406 struct nlattr *af; 1407 int err; 1408 1409 if (!(af = nla_nest_start(skb, af_ops->family))) 1410 goto nla_put_failure; 1411 1412 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1413 1414 /* 1415 * Caller may return ENODATA to indicate that there 1416 * was no data to be dumped. This is not an error, it 1417 * means we should trim the attribute header and 1418 * continue. 1419 */ 1420 if (err == -ENODATA) 1421 nla_nest_cancel(skb, af); 1422 else if (err < 0) 1423 goto nla_put_failure; 1424 1425 nla_nest_end(skb, af); 1426 } 1427 } 1428 1429 nla_nest_end(skb, af_spec); 1430 1431 nlmsg_end(skb, nlh); 1432 return 0; 1433 1434 nla_put_failure: 1435 nlmsg_cancel(skb, nlh); 1436 return -EMSGSIZE; 1437 } 1438 1439 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1440 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1441 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1442 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1443 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1444 [IFLA_MTU] = { .type = NLA_U32 }, 1445 [IFLA_LINK] = { .type = NLA_U32 }, 1446 [IFLA_MASTER] = { .type = NLA_U32 }, 1447 [IFLA_CARRIER] = { .type = NLA_U8 }, 1448 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1449 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1450 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1451 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1452 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1453 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1454 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1455 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1456 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1457 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1458 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1459 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1460 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1461 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1462 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1463 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1464 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1465 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1466 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1467 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1468 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1469 [IFLA_XDP] = { .type = NLA_NESTED }, 1470 }; 1471 1472 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1473 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1474 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1475 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1476 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1477 }; 1478 1479 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1480 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1481 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1482 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1483 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1484 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1485 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1486 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1487 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1488 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1489 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1490 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1491 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1492 }; 1493 1494 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1495 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1496 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1497 .len = PORT_PROFILE_MAX }, 1498 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1499 .len = PORT_UUID_MAX }, 1500 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1501 .len = PORT_UUID_MAX }, 1502 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1503 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1504 1505 /* Unused, but we need to keep it here since user space could 1506 * fill it. It's also broken with regard to NLA_BINARY use in 1507 * combination with structs. 1508 */ 1509 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1510 .len = sizeof(struct ifla_port_vsi) }, 1511 }; 1512 1513 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1514 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1515 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1516 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1517 }; 1518 1519 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1520 { 1521 const struct rtnl_link_ops *ops = NULL; 1522 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1523 1524 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, 1525 ifla_info_policy, NULL) < 0) 1526 return NULL; 1527 1528 if (linfo[IFLA_INFO_KIND]) { 1529 char kind[MODULE_NAME_LEN]; 1530 1531 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1532 ops = rtnl_link_ops_get(kind); 1533 } 1534 1535 return ops; 1536 } 1537 1538 static bool link_master_filtered(struct net_device *dev, int master_idx) 1539 { 1540 struct net_device *master; 1541 1542 if (!master_idx) 1543 return false; 1544 1545 master = netdev_master_upper_dev_get(dev); 1546 if (!master || master->ifindex != master_idx) 1547 return true; 1548 1549 return false; 1550 } 1551 1552 static bool link_kind_filtered(const struct net_device *dev, 1553 const struct rtnl_link_ops *kind_ops) 1554 { 1555 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1556 return true; 1557 1558 return false; 1559 } 1560 1561 static bool link_dump_filtered(struct net_device *dev, 1562 int master_idx, 1563 const struct rtnl_link_ops *kind_ops) 1564 { 1565 if (link_master_filtered(dev, master_idx) || 1566 link_kind_filtered(dev, kind_ops)) 1567 return true; 1568 1569 return false; 1570 } 1571 1572 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1573 { 1574 struct net *net = sock_net(skb->sk); 1575 int h, s_h; 1576 int idx = 0, s_idx; 1577 struct net_device *dev; 1578 struct hlist_head *head; 1579 struct nlattr *tb[IFLA_MAX+1]; 1580 u32 ext_filter_mask = 0; 1581 const struct rtnl_link_ops *kind_ops = NULL; 1582 unsigned int flags = NLM_F_MULTI; 1583 int master_idx = 0; 1584 int err; 1585 int hdrlen; 1586 1587 s_h = cb->args[0]; 1588 s_idx = cb->args[1]; 1589 1590 cb->seq = net->dev_base_seq; 1591 1592 /* A hack to preserve kernel<->userspace interface. 1593 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1594 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1595 * what iproute2 < v3.9.0 used. 1596 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1597 * attribute, its netlink message is shorter than struct ifinfomsg. 1598 */ 1599 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1600 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1601 1602 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, 1603 ifla_policy, NULL) >= 0) { 1604 if (tb[IFLA_EXT_MASK]) 1605 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1606 1607 if (tb[IFLA_MASTER]) 1608 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1609 1610 if (tb[IFLA_LINKINFO]) 1611 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1612 1613 if (master_idx || kind_ops) 1614 flags |= NLM_F_DUMP_FILTERED; 1615 } 1616 1617 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1618 idx = 0; 1619 head = &net->dev_index_head[h]; 1620 hlist_for_each_entry(dev, head, index_hlist) { 1621 if (link_dump_filtered(dev, master_idx, kind_ops)) 1622 goto cont; 1623 if (idx < s_idx) 1624 goto cont; 1625 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1626 NETLINK_CB(cb->skb).portid, 1627 cb->nlh->nlmsg_seq, 0, 1628 flags, 1629 ext_filter_mask); 1630 1631 if (err < 0) { 1632 if (likely(skb->len)) 1633 goto out; 1634 1635 goto out_err; 1636 } 1637 1638 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1639 cont: 1640 idx++; 1641 } 1642 } 1643 out: 1644 err = skb->len; 1645 out_err: 1646 cb->args[1] = idx; 1647 cb->args[0] = h; 1648 1649 return err; 1650 } 1651 1652 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len, 1653 struct netlink_ext_ack *exterr) 1654 { 1655 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy, exterr); 1656 } 1657 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1658 1659 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1660 { 1661 struct net *net; 1662 /* Examine the link attributes and figure out which 1663 * network namespace we are talking about. 1664 */ 1665 if (tb[IFLA_NET_NS_PID]) 1666 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1667 else if (tb[IFLA_NET_NS_FD]) 1668 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1669 else 1670 net = get_net(src_net); 1671 return net; 1672 } 1673 EXPORT_SYMBOL(rtnl_link_get_net); 1674 1675 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1676 { 1677 if (dev) { 1678 if (tb[IFLA_ADDRESS] && 1679 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1680 return -EINVAL; 1681 1682 if (tb[IFLA_BROADCAST] && 1683 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1684 return -EINVAL; 1685 } 1686 1687 if (tb[IFLA_AF_SPEC]) { 1688 struct nlattr *af; 1689 int rem, err; 1690 1691 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1692 const struct rtnl_af_ops *af_ops; 1693 1694 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1695 return -EAFNOSUPPORT; 1696 1697 if (!af_ops->set_link_af) 1698 return -EOPNOTSUPP; 1699 1700 if (af_ops->validate_link_af) { 1701 err = af_ops->validate_link_af(dev, af); 1702 if (err < 0) 1703 return err; 1704 } 1705 } 1706 } 1707 1708 return 0; 1709 } 1710 1711 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1712 int guid_type) 1713 { 1714 const struct net_device_ops *ops = dev->netdev_ops; 1715 1716 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1717 } 1718 1719 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1720 { 1721 if (dev->type != ARPHRD_INFINIBAND) 1722 return -EOPNOTSUPP; 1723 1724 return handle_infiniband_guid(dev, ivt, guid_type); 1725 } 1726 1727 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1728 { 1729 const struct net_device_ops *ops = dev->netdev_ops; 1730 int err = -EINVAL; 1731 1732 if (tb[IFLA_VF_MAC]) { 1733 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1734 1735 err = -EOPNOTSUPP; 1736 if (ops->ndo_set_vf_mac) 1737 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1738 ivm->mac); 1739 if (err < 0) 1740 return err; 1741 } 1742 1743 if (tb[IFLA_VF_VLAN]) { 1744 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1745 1746 err = -EOPNOTSUPP; 1747 if (ops->ndo_set_vf_vlan) 1748 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1749 ivv->qos, 1750 htons(ETH_P_8021Q)); 1751 if (err < 0) 1752 return err; 1753 } 1754 1755 if (tb[IFLA_VF_VLAN_LIST]) { 1756 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 1757 struct nlattr *attr; 1758 int rem, len = 0; 1759 1760 err = -EOPNOTSUPP; 1761 if (!ops->ndo_set_vf_vlan) 1762 return err; 1763 1764 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 1765 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 1766 nla_len(attr) < NLA_HDRLEN) { 1767 return -EINVAL; 1768 } 1769 if (len >= MAX_VLAN_LIST_LEN) 1770 return -EOPNOTSUPP; 1771 ivvl[len] = nla_data(attr); 1772 1773 len++; 1774 } 1775 if (len == 0) 1776 return -EINVAL; 1777 1778 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 1779 ivvl[0]->qos, ivvl[0]->vlan_proto); 1780 if (err < 0) 1781 return err; 1782 } 1783 1784 if (tb[IFLA_VF_TX_RATE]) { 1785 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1786 struct ifla_vf_info ivf; 1787 1788 err = -EOPNOTSUPP; 1789 if (ops->ndo_get_vf_config) 1790 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1791 if (err < 0) 1792 return err; 1793 1794 err = -EOPNOTSUPP; 1795 if (ops->ndo_set_vf_rate) 1796 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1797 ivf.min_tx_rate, 1798 ivt->rate); 1799 if (err < 0) 1800 return err; 1801 } 1802 1803 if (tb[IFLA_VF_RATE]) { 1804 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1805 1806 err = -EOPNOTSUPP; 1807 if (ops->ndo_set_vf_rate) 1808 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1809 ivt->min_tx_rate, 1810 ivt->max_tx_rate); 1811 if (err < 0) 1812 return err; 1813 } 1814 1815 if (tb[IFLA_VF_SPOOFCHK]) { 1816 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1817 1818 err = -EOPNOTSUPP; 1819 if (ops->ndo_set_vf_spoofchk) 1820 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1821 ivs->setting); 1822 if (err < 0) 1823 return err; 1824 } 1825 1826 if (tb[IFLA_VF_LINK_STATE]) { 1827 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1828 1829 err = -EOPNOTSUPP; 1830 if (ops->ndo_set_vf_link_state) 1831 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1832 ivl->link_state); 1833 if (err < 0) 1834 return err; 1835 } 1836 1837 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1838 struct ifla_vf_rss_query_en *ivrssq_en; 1839 1840 err = -EOPNOTSUPP; 1841 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1842 if (ops->ndo_set_vf_rss_query_en) 1843 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1844 ivrssq_en->setting); 1845 if (err < 0) 1846 return err; 1847 } 1848 1849 if (tb[IFLA_VF_TRUST]) { 1850 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1851 1852 err = -EOPNOTSUPP; 1853 if (ops->ndo_set_vf_trust) 1854 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1855 if (err < 0) 1856 return err; 1857 } 1858 1859 if (tb[IFLA_VF_IB_NODE_GUID]) { 1860 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1861 1862 if (!ops->ndo_set_vf_guid) 1863 return -EOPNOTSUPP; 1864 1865 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1866 } 1867 1868 if (tb[IFLA_VF_IB_PORT_GUID]) { 1869 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1870 1871 if (!ops->ndo_set_vf_guid) 1872 return -EOPNOTSUPP; 1873 1874 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1875 } 1876 1877 return err; 1878 } 1879 1880 static int do_set_master(struct net_device *dev, int ifindex) 1881 { 1882 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1883 const struct net_device_ops *ops; 1884 int err; 1885 1886 if (upper_dev) { 1887 if (upper_dev->ifindex == ifindex) 1888 return 0; 1889 ops = upper_dev->netdev_ops; 1890 if (ops->ndo_del_slave) { 1891 err = ops->ndo_del_slave(upper_dev, dev); 1892 if (err) 1893 return err; 1894 } else { 1895 return -EOPNOTSUPP; 1896 } 1897 } 1898 1899 if (ifindex) { 1900 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1901 if (!upper_dev) 1902 return -EINVAL; 1903 ops = upper_dev->netdev_ops; 1904 if (ops->ndo_add_slave) { 1905 err = ops->ndo_add_slave(upper_dev, dev); 1906 if (err) 1907 return err; 1908 } else { 1909 return -EOPNOTSUPP; 1910 } 1911 } 1912 return 0; 1913 } 1914 1915 #define DO_SETLINK_MODIFIED 0x01 1916 /* notify flag means notify + modified. */ 1917 #define DO_SETLINK_NOTIFY 0x03 1918 static int do_setlink(const struct sk_buff *skb, 1919 struct net_device *dev, struct ifinfomsg *ifm, 1920 struct netlink_ext_ack *extack, 1921 struct nlattr **tb, char *ifname, int status) 1922 { 1923 const struct net_device_ops *ops = dev->netdev_ops; 1924 int err; 1925 1926 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1927 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1928 if (IS_ERR(net)) { 1929 err = PTR_ERR(net); 1930 goto errout; 1931 } 1932 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1933 put_net(net); 1934 err = -EPERM; 1935 goto errout; 1936 } 1937 err = dev_change_net_namespace(dev, net, ifname); 1938 put_net(net); 1939 if (err) 1940 goto errout; 1941 status |= DO_SETLINK_MODIFIED; 1942 } 1943 1944 if (tb[IFLA_MAP]) { 1945 struct rtnl_link_ifmap *u_map; 1946 struct ifmap k_map; 1947 1948 if (!ops->ndo_set_config) { 1949 err = -EOPNOTSUPP; 1950 goto errout; 1951 } 1952 1953 if (!netif_device_present(dev)) { 1954 err = -ENODEV; 1955 goto errout; 1956 } 1957 1958 u_map = nla_data(tb[IFLA_MAP]); 1959 k_map.mem_start = (unsigned long) u_map->mem_start; 1960 k_map.mem_end = (unsigned long) u_map->mem_end; 1961 k_map.base_addr = (unsigned short) u_map->base_addr; 1962 k_map.irq = (unsigned char) u_map->irq; 1963 k_map.dma = (unsigned char) u_map->dma; 1964 k_map.port = (unsigned char) u_map->port; 1965 1966 err = ops->ndo_set_config(dev, &k_map); 1967 if (err < 0) 1968 goto errout; 1969 1970 status |= DO_SETLINK_NOTIFY; 1971 } 1972 1973 if (tb[IFLA_ADDRESS]) { 1974 struct sockaddr *sa; 1975 int len; 1976 1977 len = sizeof(sa_family_t) + dev->addr_len; 1978 sa = kmalloc(len, GFP_KERNEL); 1979 if (!sa) { 1980 err = -ENOMEM; 1981 goto errout; 1982 } 1983 sa->sa_family = dev->type; 1984 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1985 dev->addr_len); 1986 err = dev_set_mac_address(dev, sa); 1987 kfree(sa); 1988 if (err) 1989 goto errout; 1990 status |= DO_SETLINK_MODIFIED; 1991 } 1992 1993 if (tb[IFLA_MTU]) { 1994 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1995 if (err < 0) 1996 goto errout; 1997 status |= DO_SETLINK_MODIFIED; 1998 } 1999 2000 if (tb[IFLA_GROUP]) { 2001 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2002 status |= DO_SETLINK_NOTIFY; 2003 } 2004 2005 /* 2006 * Interface selected by interface index but interface 2007 * name provided implies that a name change has been 2008 * requested. 2009 */ 2010 if (ifm->ifi_index > 0 && ifname[0]) { 2011 err = dev_change_name(dev, ifname); 2012 if (err < 0) 2013 goto errout; 2014 status |= DO_SETLINK_MODIFIED; 2015 } 2016 2017 if (tb[IFLA_IFALIAS]) { 2018 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2019 nla_len(tb[IFLA_IFALIAS])); 2020 if (err < 0) 2021 goto errout; 2022 status |= DO_SETLINK_NOTIFY; 2023 } 2024 2025 if (tb[IFLA_BROADCAST]) { 2026 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2027 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2028 } 2029 2030 if (ifm->ifi_flags || ifm->ifi_change) { 2031 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2032 if (err < 0) 2033 goto errout; 2034 } 2035 2036 if (tb[IFLA_MASTER]) { 2037 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2038 if (err) 2039 goto errout; 2040 status |= DO_SETLINK_MODIFIED; 2041 } 2042 2043 if (tb[IFLA_CARRIER]) { 2044 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2045 if (err) 2046 goto errout; 2047 status |= DO_SETLINK_MODIFIED; 2048 } 2049 2050 if (tb[IFLA_TXQLEN]) { 2051 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 2052 unsigned long orig_len = dev->tx_queue_len; 2053 2054 if (dev->tx_queue_len ^ value) { 2055 dev->tx_queue_len = value; 2056 err = call_netdevice_notifiers( 2057 NETDEV_CHANGE_TX_QUEUE_LEN, dev); 2058 err = notifier_to_errno(err); 2059 if (err) { 2060 dev->tx_queue_len = orig_len; 2061 goto errout; 2062 } 2063 status |= DO_SETLINK_NOTIFY; 2064 } 2065 } 2066 2067 if (tb[IFLA_OPERSTATE]) 2068 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2069 2070 if (tb[IFLA_LINKMODE]) { 2071 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2072 2073 write_lock_bh(&dev_base_lock); 2074 if (dev->link_mode ^ value) 2075 status |= DO_SETLINK_NOTIFY; 2076 dev->link_mode = value; 2077 write_unlock_bh(&dev_base_lock); 2078 } 2079 2080 if (tb[IFLA_VFINFO_LIST]) { 2081 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2082 struct nlattr *attr; 2083 int rem; 2084 2085 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2086 if (nla_type(attr) != IFLA_VF_INFO || 2087 nla_len(attr) < NLA_HDRLEN) { 2088 err = -EINVAL; 2089 goto errout; 2090 } 2091 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 2092 ifla_vf_policy, NULL); 2093 if (err < 0) 2094 goto errout; 2095 err = do_setvfinfo(dev, vfinfo); 2096 if (err < 0) 2097 goto errout; 2098 status |= DO_SETLINK_NOTIFY; 2099 } 2100 } 2101 err = 0; 2102 2103 if (tb[IFLA_VF_PORTS]) { 2104 struct nlattr *port[IFLA_PORT_MAX+1]; 2105 struct nlattr *attr; 2106 int vf; 2107 int rem; 2108 2109 err = -EOPNOTSUPP; 2110 if (!ops->ndo_set_vf_port) 2111 goto errout; 2112 2113 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2114 if (nla_type(attr) != IFLA_VF_PORT || 2115 nla_len(attr) < NLA_HDRLEN) { 2116 err = -EINVAL; 2117 goto errout; 2118 } 2119 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 2120 ifla_port_policy, NULL); 2121 if (err < 0) 2122 goto errout; 2123 if (!port[IFLA_PORT_VF]) { 2124 err = -EOPNOTSUPP; 2125 goto errout; 2126 } 2127 vf = nla_get_u32(port[IFLA_PORT_VF]); 2128 err = ops->ndo_set_vf_port(dev, vf, port); 2129 if (err < 0) 2130 goto errout; 2131 status |= DO_SETLINK_NOTIFY; 2132 } 2133 } 2134 err = 0; 2135 2136 if (tb[IFLA_PORT_SELF]) { 2137 struct nlattr *port[IFLA_PORT_MAX+1]; 2138 2139 err = nla_parse_nested(port, IFLA_PORT_MAX, 2140 tb[IFLA_PORT_SELF], ifla_port_policy, 2141 NULL); 2142 if (err < 0) 2143 goto errout; 2144 2145 err = -EOPNOTSUPP; 2146 if (ops->ndo_set_vf_port) 2147 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2148 if (err < 0) 2149 goto errout; 2150 status |= DO_SETLINK_NOTIFY; 2151 } 2152 2153 if (tb[IFLA_AF_SPEC]) { 2154 struct nlattr *af; 2155 int rem; 2156 2157 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2158 const struct rtnl_af_ops *af_ops; 2159 2160 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2161 BUG(); 2162 2163 err = af_ops->set_link_af(dev, af); 2164 if (err < 0) 2165 goto errout; 2166 2167 status |= DO_SETLINK_NOTIFY; 2168 } 2169 } 2170 err = 0; 2171 2172 if (tb[IFLA_PROTO_DOWN]) { 2173 err = dev_change_proto_down(dev, 2174 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2175 if (err) 2176 goto errout; 2177 status |= DO_SETLINK_NOTIFY; 2178 } 2179 2180 if (tb[IFLA_XDP]) { 2181 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2182 u32 xdp_flags = 0; 2183 2184 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2185 ifla_xdp_policy, NULL); 2186 if (err < 0) 2187 goto errout; 2188 2189 if (xdp[IFLA_XDP_ATTACHED]) { 2190 err = -EINVAL; 2191 goto errout; 2192 } 2193 2194 if (xdp[IFLA_XDP_FLAGS]) { 2195 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2196 if (xdp_flags & ~XDP_FLAGS_MASK) { 2197 err = -EINVAL; 2198 goto errout; 2199 } 2200 if ((xdp_flags & XDP_FLAGS_SKB_MODE) && 2201 (xdp_flags & XDP_FLAGS_DRV_MODE)) { 2202 err = -EINVAL; 2203 goto errout; 2204 } 2205 } 2206 2207 if (xdp[IFLA_XDP_FD]) { 2208 err = dev_change_xdp_fd(dev, extack, 2209 nla_get_s32(xdp[IFLA_XDP_FD]), 2210 xdp_flags); 2211 if (err) 2212 goto errout; 2213 status |= DO_SETLINK_NOTIFY; 2214 } 2215 } 2216 2217 errout: 2218 if (status & DO_SETLINK_MODIFIED) { 2219 if (status & DO_SETLINK_NOTIFY) 2220 netdev_state_change(dev); 2221 2222 if (err < 0) 2223 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", 2224 dev->name); 2225 } 2226 2227 return err; 2228 } 2229 2230 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2231 struct netlink_ext_ack *extack) 2232 { 2233 struct net *net = sock_net(skb->sk); 2234 struct ifinfomsg *ifm; 2235 struct net_device *dev; 2236 int err; 2237 struct nlattr *tb[IFLA_MAX+1]; 2238 char ifname[IFNAMSIZ]; 2239 2240 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, 2241 extack); 2242 if (err < 0) 2243 goto errout; 2244 2245 if (tb[IFLA_IFNAME]) 2246 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2247 else 2248 ifname[0] = '\0'; 2249 2250 err = -EINVAL; 2251 ifm = nlmsg_data(nlh); 2252 if (ifm->ifi_index > 0) 2253 dev = __dev_get_by_index(net, ifm->ifi_index); 2254 else if (tb[IFLA_IFNAME]) 2255 dev = __dev_get_by_name(net, ifname); 2256 else 2257 goto errout; 2258 2259 if (dev == NULL) { 2260 err = -ENODEV; 2261 goto errout; 2262 } 2263 2264 err = validate_linkmsg(dev, tb); 2265 if (err < 0) 2266 goto errout; 2267 2268 err = do_setlink(skb, dev, ifm, extack, tb, ifname, 0); 2269 errout: 2270 return err; 2271 } 2272 2273 static int rtnl_group_dellink(const struct net *net, int group) 2274 { 2275 struct net_device *dev, *aux; 2276 LIST_HEAD(list_kill); 2277 bool found = false; 2278 2279 if (!group) 2280 return -EPERM; 2281 2282 for_each_netdev(net, dev) { 2283 if (dev->group == group) { 2284 const struct rtnl_link_ops *ops; 2285 2286 found = true; 2287 ops = dev->rtnl_link_ops; 2288 if (!ops || !ops->dellink) 2289 return -EOPNOTSUPP; 2290 } 2291 } 2292 2293 if (!found) 2294 return -ENODEV; 2295 2296 for_each_netdev_safe(net, dev, aux) { 2297 if (dev->group == group) { 2298 const struct rtnl_link_ops *ops; 2299 2300 ops = dev->rtnl_link_ops; 2301 ops->dellink(dev, &list_kill); 2302 } 2303 } 2304 unregister_netdevice_many(&list_kill); 2305 2306 return 0; 2307 } 2308 2309 int rtnl_delete_link(struct net_device *dev) 2310 { 2311 const struct rtnl_link_ops *ops; 2312 LIST_HEAD(list_kill); 2313 2314 ops = dev->rtnl_link_ops; 2315 if (!ops || !ops->dellink) 2316 return -EOPNOTSUPP; 2317 2318 ops->dellink(dev, &list_kill); 2319 unregister_netdevice_many(&list_kill); 2320 2321 return 0; 2322 } 2323 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2324 2325 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 2326 struct netlink_ext_ack *extack) 2327 { 2328 struct net *net = sock_net(skb->sk); 2329 struct net_device *dev; 2330 struct ifinfomsg *ifm; 2331 char ifname[IFNAMSIZ]; 2332 struct nlattr *tb[IFLA_MAX+1]; 2333 int err; 2334 2335 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2336 if (err < 0) 2337 return err; 2338 2339 if (tb[IFLA_IFNAME]) 2340 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2341 2342 ifm = nlmsg_data(nlh); 2343 if (ifm->ifi_index > 0) 2344 dev = __dev_get_by_index(net, ifm->ifi_index); 2345 else if (tb[IFLA_IFNAME]) 2346 dev = __dev_get_by_name(net, ifname); 2347 else if (tb[IFLA_GROUP]) 2348 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2349 else 2350 return -EINVAL; 2351 2352 if (!dev) 2353 return -ENODEV; 2354 2355 return rtnl_delete_link(dev); 2356 } 2357 2358 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2359 { 2360 unsigned int old_flags; 2361 int err; 2362 2363 old_flags = dev->flags; 2364 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2365 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2366 if (err < 0) 2367 return err; 2368 } 2369 2370 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2371 2372 __dev_notify_flags(dev, old_flags, ~0U); 2373 return 0; 2374 } 2375 EXPORT_SYMBOL(rtnl_configure_link); 2376 2377 struct net_device *rtnl_create_link(struct net *net, 2378 const char *ifname, unsigned char name_assign_type, 2379 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2380 { 2381 struct net_device *dev; 2382 unsigned int num_tx_queues = 1; 2383 unsigned int num_rx_queues = 1; 2384 2385 if (tb[IFLA_NUM_TX_QUEUES]) 2386 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2387 else if (ops->get_num_tx_queues) 2388 num_tx_queues = ops->get_num_tx_queues(); 2389 2390 if (tb[IFLA_NUM_RX_QUEUES]) 2391 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2392 else if (ops->get_num_rx_queues) 2393 num_rx_queues = ops->get_num_rx_queues(); 2394 2395 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2396 ops->setup, num_tx_queues, num_rx_queues); 2397 if (!dev) 2398 return ERR_PTR(-ENOMEM); 2399 2400 dev_net_set(dev, net); 2401 dev->rtnl_link_ops = ops; 2402 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2403 2404 if (tb[IFLA_MTU]) 2405 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2406 if (tb[IFLA_ADDRESS]) { 2407 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2408 nla_len(tb[IFLA_ADDRESS])); 2409 dev->addr_assign_type = NET_ADDR_SET; 2410 } 2411 if (tb[IFLA_BROADCAST]) 2412 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2413 nla_len(tb[IFLA_BROADCAST])); 2414 if (tb[IFLA_TXQLEN]) 2415 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2416 if (tb[IFLA_OPERSTATE]) 2417 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2418 if (tb[IFLA_LINKMODE]) 2419 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2420 if (tb[IFLA_GROUP]) 2421 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2422 2423 return dev; 2424 } 2425 EXPORT_SYMBOL(rtnl_create_link); 2426 2427 static int rtnl_group_changelink(const struct sk_buff *skb, 2428 struct net *net, int group, 2429 struct ifinfomsg *ifm, 2430 struct netlink_ext_ack *extack, 2431 struct nlattr **tb) 2432 { 2433 struct net_device *dev, *aux; 2434 int err; 2435 2436 for_each_netdev_safe(net, dev, aux) { 2437 if (dev->group == group) { 2438 err = do_setlink(skb, dev, ifm, extack, tb, NULL, 0); 2439 if (err < 0) 2440 return err; 2441 } 2442 } 2443 2444 return 0; 2445 } 2446 2447 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2448 struct netlink_ext_ack *extack) 2449 { 2450 struct net *net = sock_net(skb->sk); 2451 const struct rtnl_link_ops *ops; 2452 const struct rtnl_link_ops *m_ops = NULL; 2453 struct net_device *dev; 2454 struct net_device *master_dev = NULL; 2455 struct ifinfomsg *ifm; 2456 char kind[MODULE_NAME_LEN]; 2457 char ifname[IFNAMSIZ]; 2458 struct nlattr *tb[IFLA_MAX+1]; 2459 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2460 unsigned char name_assign_type = NET_NAME_USER; 2461 int err; 2462 2463 #ifdef CONFIG_MODULES 2464 replay: 2465 #endif 2466 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2467 if (err < 0) 2468 return err; 2469 2470 if (tb[IFLA_IFNAME]) 2471 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2472 else 2473 ifname[0] = '\0'; 2474 2475 ifm = nlmsg_data(nlh); 2476 if (ifm->ifi_index > 0) 2477 dev = __dev_get_by_index(net, ifm->ifi_index); 2478 else { 2479 if (ifname[0]) 2480 dev = __dev_get_by_name(net, ifname); 2481 else 2482 dev = NULL; 2483 } 2484 2485 if (dev) { 2486 master_dev = netdev_master_upper_dev_get(dev); 2487 if (master_dev) 2488 m_ops = master_dev->rtnl_link_ops; 2489 } 2490 2491 err = validate_linkmsg(dev, tb); 2492 if (err < 0) 2493 return err; 2494 2495 if (tb[IFLA_LINKINFO]) { 2496 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2497 tb[IFLA_LINKINFO], ifla_info_policy, 2498 NULL); 2499 if (err < 0) 2500 return err; 2501 } else 2502 memset(linkinfo, 0, sizeof(linkinfo)); 2503 2504 if (linkinfo[IFLA_INFO_KIND]) { 2505 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2506 ops = rtnl_link_ops_get(kind); 2507 } else { 2508 kind[0] = '\0'; 2509 ops = NULL; 2510 } 2511 2512 if (1) { 2513 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2514 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2515 struct nlattr **data = NULL; 2516 struct nlattr **slave_data = NULL; 2517 struct net *dest_net, *link_net = NULL; 2518 2519 if (ops) { 2520 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2521 err = nla_parse_nested(attr, ops->maxtype, 2522 linkinfo[IFLA_INFO_DATA], 2523 ops->policy, NULL); 2524 if (err < 0) 2525 return err; 2526 data = attr; 2527 } 2528 if (ops->validate) { 2529 err = ops->validate(tb, data); 2530 if (err < 0) 2531 return err; 2532 } 2533 } 2534 2535 if (m_ops) { 2536 if (m_ops->slave_maxtype && 2537 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2538 err = nla_parse_nested(slave_attr, 2539 m_ops->slave_maxtype, 2540 linkinfo[IFLA_INFO_SLAVE_DATA], 2541 m_ops->slave_policy, 2542 NULL); 2543 if (err < 0) 2544 return err; 2545 slave_data = slave_attr; 2546 } 2547 if (m_ops->slave_validate) { 2548 err = m_ops->slave_validate(tb, slave_data); 2549 if (err < 0) 2550 return err; 2551 } 2552 } 2553 2554 if (dev) { 2555 int status = 0; 2556 2557 if (nlh->nlmsg_flags & NLM_F_EXCL) 2558 return -EEXIST; 2559 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2560 return -EOPNOTSUPP; 2561 2562 if (linkinfo[IFLA_INFO_DATA]) { 2563 if (!ops || ops != dev->rtnl_link_ops || 2564 !ops->changelink) 2565 return -EOPNOTSUPP; 2566 2567 err = ops->changelink(dev, tb, data); 2568 if (err < 0) 2569 return err; 2570 status |= DO_SETLINK_NOTIFY; 2571 } 2572 2573 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2574 if (!m_ops || !m_ops->slave_changelink) 2575 return -EOPNOTSUPP; 2576 2577 err = m_ops->slave_changelink(master_dev, dev, 2578 tb, slave_data); 2579 if (err < 0) 2580 return err; 2581 status |= DO_SETLINK_NOTIFY; 2582 } 2583 2584 return do_setlink(skb, dev, ifm, extack, tb, ifname, 2585 status); 2586 } 2587 2588 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2589 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2590 return rtnl_group_changelink(skb, net, 2591 nla_get_u32(tb[IFLA_GROUP]), 2592 ifm, extack, tb); 2593 return -ENODEV; 2594 } 2595 2596 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 2597 return -EOPNOTSUPP; 2598 2599 if (!ops) { 2600 #ifdef CONFIG_MODULES 2601 if (kind[0]) { 2602 __rtnl_unlock(); 2603 request_module("rtnl-link-%s", kind); 2604 rtnl_lock(); 2605 ops = rtnl_link_ops_get(kind); 2606 if (ops) 2607 goto replay; 2608 } 2609 #endif 2610 return -EOPNOTSUPP; 2611 } 2612 2613 if (!ops->setup) 2614 return -EOPNOTSUPP; 2615 2616 if (!ifname[0]) { 2617 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2618 name_assign_type = NET_NAME_ENUM; 2619 } 2620 2621 dest_net = rtnl_link_get_net(net, tb); 2622 if (IS_ERR(dest_net)) 2623 return PTR_ERR(dest_net); 2624 2625 err = -EPERM; 2626 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2627 goto out; 2628 2629 if (tb[IFLA_LINK_NETNSID]) { 2630 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2631 2632 link_net = get_net_ns_by_id(dest_net, id); 2633 if (!link_net) { 2634 err = -EINVAL; 2635 goto out; 2636 } 2637 err = -EPERM; 2638 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2639 goto out; 2640 } 2641 2642 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2643 name_assign_type, ops, tb); 2644 if (IS_ERR(dev)) { 2645 err = PTR_ERR(dev); 2646 goto out; 2647 } 2648 2649 dev->ifindex = ifm->ifi_index; 2650 2651 if (ops->newlink) { 2652 err = ops->newlink(link_net ? : net, dev, tb, data); 2653 /* Drivers should call free_netdev() in ->destructor 2654 * and unregister it on failure after registration 2655 * so that device could be finally freed in rtnl_unlock. 2656 */ 2657 if (err < 0) { 2658 /* If device is not registered at all, free it now */ 2659 if (dev->reg_state == NETREG_UNINITIALIZED) 2660 free_netdev(dev); 2661 goto out; 2662 } 2663 } else { 2664 err = register_netdevice(dev); 2665 if (err < 0) { 2666 free_netdev(dev); 2667 goto out; 2668 } 2669 } 2670 err = rtnl_configure_link(dev, ifm); 2671 if (err < 0) 2672 goto out_unregister; 2673 if (link_net) { 2674 err = dev_change_net_namespace(dev, dest_net, ifname); 2675 if (err < 0) 2676 goto out_unregister; 2677 } 2678 if (tb[IFLA_MASTER]) { 2679 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2680 if (err) 2681 goto out_unregister; 2682 } 2683 out: 2684 if (link_net) 2685 put_net(link_net); 2686 put_net(dest_net); 2687 return err; 2688 out_unregister: 2689 if (ops->newlink) { 2690 LIST_HEAD(list_kill); 2691 2692 ops->dellink(dev, &list_kill); 2693 unregister_netdevice_many(&list_kill); 2694 } else { 2695 unregister_netdevice(dev); 2696 } 2697 goto out; 2698 } 2699 } 2700 2701 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr *nlh, 2702 struct netlink_ext_ack *extack) 2703 { 2704 struct net *net = sock_net(skb->sk); 2705 struct ifinfomsg *ifm; 2706 char ifname[IFNAMSIZ]; 2707 struct nlattr *tb[IFLA_MAX+1]; 2708 struct net_device *dev = NULL; 2709 struct sk_buff *nskb; 2710 int err; 2711 u32 ext_filter_mask = 0; 2712 2713 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy, extack); 2714 if (err < 0) 2715 return err; 2716 2717 if (tb[IFLA_IFNAME]) 2718 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2719 2720 if (tb[IFLA_EXT_MASK]) 2721 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2722 2723 ifm = nlmsg_data(nlh); 2724 if (ifm->ifi_index > 0) 2725 dev = __dev_get_by_index(net, ifm->ifi_index); 2726 else if (tb[IFLA_IFNAME]) 2727 dev = __dev_get_by_name(net, ifname); 2728 else 2729 return -EINVAL; 2730 2731 if (dev == NULL) 2732 return -ENODEV; 2733 2734 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2735 if (nskb == NULL) 2736 return -ENOBUFS; 2737 2738 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2739 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2740 if (err < 0) { 2741 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2742 WARN_ON(err == -EMSGSIZE); 2743 kfree_skb(nskb); 2744 } else 2745 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2746 2747 return err; 2748 } 2749 2750 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2751 { 2752 struct net *net = sock_net(skb->sk); 2753 struct net_device *dev; 2754 struct nlattr *tb[IFLA_MAX+1]; 2755 u32 ext_filter_mask = 0; 2756 u16 min_ifinfo_dump_size = 0; 2757 int hdrlen; 2758 2759 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2760 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2761 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2762 2763 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy, NULL) >= 0) { 2764 if (tb[IFLA_EXT_MASK]) 2765 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2766 } 2767 2768 if (!ext_filter_mask) 2769 return NLMSG_GOODSIZE; 2770 /* 2771 * traverse the list of net devices and compute the minimum 2772 * buffer size based upon the filter mask. 2773 */ 2774 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2775 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2776 if_nlmsg_size(dev, 2777 ext_filter_mask)); 2778 } 2779 2780 return nlmsg_total_size(min_ifinfo_dump_size); 2781 } 2782 2783 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2784 { 2785 int idx; 2786 int s_idx = cb->family; 2787 2788 if (s_idx == 0) 2789 s_idx = 1; 2790 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2791 int type = cb->nlh->nlmsg_type-RTM_BASE; 2792 if (idx < s_idx || idx == PF_PACKET) 2793 continue; 2794 if (rtnl_msg_handlers[idx] == NULL || 2795 rtnl_msg_handlers[idx][type].dumpit == NULL) 2796 continue; 2797 if (idx > s_idx) { 2798 memset(&cb->args[0], 0, sizeof(cb->args)); 2799 cb->prev_seq = 0; 2800 cb->seq = 0; 2801 } 2802 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2803 break; 2804 } 2805 cb->family = idx; 2806 2807 return skb->len; 2808 } 2809 2810 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2811 unsigned int change, gfp_t flags) 2812 { 2813 struct net *net = dev_net(dev); 2814 struct sk_buff *skb; 2815 int err = -ENOBUFS; 2816 size_t if_info_size; 2817 2818 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2819 if (skb == NULL) 2820 goto errout; 2821 2822 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2823 if (err < 0) { 2824 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2825 WARN_ON(err == -EMSGSIZE); 2826 kfree_skb(skb); 2827 goto errout; 2828 } 2829 return skb; 2830 errout: 2831 if (err < 0) 2832 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2833 return NULL; 2834 } 2835 2836 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2837 { 2838 struct net *net = dev_net(dev); 2839 2840 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2841 } 2842 2843 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2844 gfp_t flags) 2845 { 2846 struct sk_buff *skb; 2847 2848 if (dev->reg_state != NETREG_REGISTERED) 2849 return; 2850 2851 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2852 if (skb) 2853 rtmsg_ifinfo_send(skb, dev, flags); 2854 } 2855 EXPORT_SYMBOL(rtmsg_ifinfo); 2856 2857 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2858 struct net_device *dev, 2859 u8 *addr, u16 vid, u32 pid, u32 seq, 2860 int type, unsigned int flags, 2861 int nlflags, u16 ndm_state) 2862 { 2863 struct nlmsghdr *nlh; 2864 struct ndmsg *ndm; 2865 2866 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2867 if (!nlh) 2868 return -EMSGSIZE; 2869 2870 ndm = nlmsg_data(nlh); 2871 ndm->ndm_family = AF_BRIDGE; 2872 ndm->ndm_pad1 = 0; 2873 ndm->ndm_pad2 = 0; 2874 ndm->ndm_flags = flags; 2875 ndm->ndm_type = 0; 2876 ndm->ndm_ifindex = dev->ifindex; 2877 ndm->ndm_state = ndm_state; 2878 2879 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2880 goto nla_put_failure; 2881 if (vid) 2882 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2883 goto nla_put_failure; 2884 2885 nlmsg_end(skb, nlh); 2886 return 0; 2887 2888 nla_put_failure: 2889 nlmsg_cancel(skb, nlh); 2890 return -EMSGSIZE; 2891 } 2892 2893 static inline size_t rtnl_fdb_nlmsg_size(void) 2894 { 2895 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 2896 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 2897 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 2898 0; 2899 } 2900 2901 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2902 u16 ndm_state) 2903 { 2904 struct net *net = dev_net(dev); 2905 struct sk_buff *skb; 2906 int err = -ENOBUFS; 2907 2908 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2909 if (!skb) 2910 goto errout; 2911 2912 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2913 0, 0, type, NTF_SELF, 0, ndm_state); 2914 if (err < 0) { 2915 kfree_skb(skb); 2916 goto errout; 2917 } 2918 2919 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2920 return; 2921 errout: 2922 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2923 } 2924 2925 /** 2926 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2927 */ 2928 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2929 struct nlattr *tb[], 2930 struct net_device *dev, 2931 const unsigned char *addr, u16 vid, 2932 u16 flags) 2933 { 2934 int err = -EINVAL; 2935 2936 /* If aging addresses are supported device will need to 2937 * implement its own handler for this. 2938 */ 2939 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2940 pr_info("%s: FDB only supports static addresses\n", dev->name); 2941 return err; 2942 } 2943 2944 if (vid) { 2945 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2946 return err; 2947 } 2948 2949 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2950 err = dev_uc_add_excl(dev, addr); 2951 else if (is_multicast_ether_addr(addr)) 2952 err = dev_mc_add_excl(dev, addr); 2953 2954 /* Only return duplicate errors if NLM_F_EXCL is set */ 2955 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2956 err = 0; 2957 2958 return err; 2959 } 2960 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2961 2962 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2963 { 2964 u16 vid = 0; 2965 2966 if (vlan_attr) { 2967 if (nla_len(vlan_attr) != sizeof(u16)) { 2968 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2969 return -EINVAL; 2970 } 2971 2972 vid = nla_get_u16(vlan_attr); 2973 2974 if (!vid || vid >= VLAN_VID_MASK) { 2975 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2976 vid); 2977 return -EINVAL; 2978 } 2979 } 2980 *p_vid = vid; 2981 return 0; 2982 } 2983 2984 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh, 2985 struct netlink_ext_ack *extack) 2986 { 2987 struct net *net = sock_net(skb->sk); 2988 struct ndmsg *ndm; 2989 struct nlattr *tb[NDA_MAX+1]; 2990 struct net_device *dev; 2991 u8 *addr; 2992 u16 vid; 2993 int err; 2994 2995 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack); 2996 if (err < 0) 2997 return err; 2998 2999 ndm = nlmsg_data(nlh); 3000 if (ndm->ndm_ifindex == 0) { 3001 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 3002 return -EINVAL; 3003 } 3004 3005 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3006 if (dev == NULL) { 3007 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 3008 return -ENODEV; 3009 } 3010 3011 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3012 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 3013 return -EINVAL; 3014 } 3015 3016 addr = nla_data(tb[NDA_LLADDR]); 3017 3018 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 3019 if (err) 3020 return err; 3021 3022 err = -EOPNOTSUPP; 3023 3024 /* Support fdb on master device the net/bridge default case */ 3025 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3026 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3027 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3028 const struct net_device_ops *ops = br_dev->netdev_ops; 3029 3030 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 3031 nlh->nlmsg_flags); 3032 if (err) 3033 goto out; 3034 else 3035 ndm->ndm_flags &= ~NTF_MASTER; 3036 } 3037 3038 /* Embedded bridge, macvlan, and any other device support */ 3039 if ((ndm->ndm_flags & NTF_SELF)) { 3040 if (dev->netdev_ops->ndo_fdb_add) 3041 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 3042 vid, 3043 nlh->nlmsg_flags); 3044 else 3045 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 3046 nlh->nlmsg_flags); 3047 3048 if (!err) { 3049 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3050 ndm->ndm_state); 3051 ndm->ndm_flags &= ~NTF_SELF; 3052 } 3053 } 3054 out: 3055 return err; 3056 } 3057 3058 /** 3059 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3060 */ 3061 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3062 struct nlattr *tb[], 3063 struct net_device *dev, 3064 const unsigned char *addr, u16 vid) 3065 { 3066 int err = -EINVAL; 3067 3068 /* If aging addresses are supported device will need to 3069 * implement its own handler for this. 3070 */ 3071 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3072 pr_info("%s: FDB only supports static addresses\n", dev->name); 3073 return err; 3074 } 3075 3076 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3077 err = dev_uc_del(dev, addr); 3078 else if (is_multicast_ether_addr(addr)) 3079 err = dev_mc_del(dev, addr); 3080 3081 return err; 3082 } 3083 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3084 3085 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh, 3086 struct netlink_ext_ack *extack) 3087 { 3088 struct net *net = sock_net(skb->sk); 3089 struct ndmsg *ndm; 3090 struct nlattr *tb[NDA_MAX+1]; 3091 struct net_device *dev; 3092 int err = -EINVAL; 3093 __u8 *addr; 3094 u16 vid; 3095 3096 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3097 return -EPERM; 3098 3099 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL, extack); 3100 if (err < 0) 3101 return err; 3102 3103 ndm = nlmsg_data(nlh); 3104 if (ndm->ndm_ifindex == 0) { 3105 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 3106 return -EINVAL; 3107 } 3108 3109 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3110 if (dev == NULL) { 3111 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 3112 return -ENODEV; 3113 } 3114 3115 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3116 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 3117 return -EINVAL; 3118 } 3119 3120 addr = nla_data(tb[NDA_LLADDR]); 3121 3122 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 3123 if (err) 3124 return err; 3125 3126 err = -EOPNOTSUPP; 3127 3128 /* Support fdb on master device the net/bridge default case */ 3129 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3130 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3131 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3132 const struct net_device_ops *ops = br_dev->netdev_ops; 3133 3134 if (ops->ndo_fdb_del) 3135 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3136 3137 if (err) 3138 goto out; 3139 else 3140 ndm->ndm_flags &= ~NTF_MASTER; 3141 } 3142 3143 /* Embedded bridge, macvlan, and any other device support */ 3144 if (ndm->ndm_flags & NTF_SELF) { 3145 if (dev->netdev_ops->ndo_fdb_del) 3146 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3147 vid); 3148 else 3149 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3150 3151 if (!err) { 3152 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3153 ndm->ndm_state); 3154 ndm->ndm_flags &= ~NTF_SELF; 3155 } 3156 } 3157 out: 3158 return err; 3159 } 3160 3161 static int nlmsg_populate_fdb(struct sk_buff *skb, 3162 struct netlink_callback *cb, 3163 struct net_device *dev, 3164 int *idx, 3165 struct netdev_hw_addr_list *list) 3166 { 3167 struct netdev_hw_addr *ha; 3168 int err; 3169 u32 portid, seq; 3170 3171 portid = NETLINK_CB(cb->skb).portid; 3172 seq = cb->nlh->nlmsg_seq; 3173 3174 list_for_each_entry(ha, &list->list, list) { 3175 if (*idx < cb->args[2]) 3176 goto skip; 3177 3178 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3179 portid, seq, 3180 RTM_NEWNEIGH, NTF_SELF, 3181 NLM_F_MULTI, NUD_PERMANENT); 3182 if (err < 0) 3183 return err; 3184 skip: 3185 *idx += 1; 3186 } 3187 return 0; 3188 } 3189 3190 /** 3191 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3192 * @nlh: netlink message header 3193 * @dev: netdevice 3194 * 3195 * Default netdevice operation to dump the existing unicast address list. 3196 * Returns number of addresses from list put in skb. 3197 */ 3198 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3199 struct netlink_callback *cb, 3200 struct net_device *dev, 3201 struct net_device *filter_dev, 3202 int *idx) 3203 { 3204 int err; 3205 3206 netif_addr_lock_bh(dev); 3207 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3208 if (err) 3209 goto out; 3210 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3211 out: 3212 netif_addr_unlock_bh(dev); 3213 return err; 3214 } 3215 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3216 3217 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3218 { 3219 struct net_device *dev; 3220 struct nlattr *tb[IFLA_MAX+1]; 3221 struct net_device *br_dev = NULL; 3222 const struct net_device_ops *ops = NULL; 3223 const struct net_device_ops *cops = NULL; 3224 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3225 struct net *net = sock_net(skb->sk); 3226 struct hlist_head *head; 3227 int brport_idx = 0; 3228 int br_idx = 0; 3229 int h, s_h; 3230 int idx = 0, s_idx; 3231 int err = 0; 3232 int fidx = 0; 3233 3234 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, 3235 IFLA_MAX, ifla_policy, NULL) == 0) { 3236 if (tb[IFLA_MASTER]) 3237 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3238 } 3239 3240 brport_idx = ifm->ifi_index; 3241 3242 if (br_idx) { 3243 br_dev = __dev_get_by_index(net, br_idx); 3244 if (!br_dev) 3245 return -ENODEV; 3246 3247 ops = br_dev->netdev_ops; 3248 } 3249 3250 s_h = cb->args[0]; 3251 s_idx = cb->args[1]; 3252 3253 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3254 idx = 0; 3255 head = &net->dev_index_head[h]; 3256 hlist_for_each_entry(dev, head, index_hlist) { 3257 3258 if (brport_idx && (dev->ifindex != brport_idx)) 3259 continue; 3260 3261 if (!br_idx) { /* user did not specify a specific bridge */ 3262 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3263 br_dev = netdev_master_upper_dev_get(dev); 3264 cops = br_dev->netdev_ops; 3265 } 3266 } else { 3267 if (dev != br_dev && 3268 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3269 continue; 3270 3271 if (br_dev != netdev_master_upper_dev_get(dev) && 3272 !(dev->priv_flags & IFF_EBRIDGE)) 3273 continue; 3274 cops = ops; 3275 } 3276 3277 if (idx < s_idx) 3278 goto cont; 3279 3280 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3281 if (cops && cops->ndo_fdb_dump) { 3282 err = cops->ndo_fdb_dump(skb, cb, 3283 br_dev, dev, 3284 &fidx); 3285 if (err == -EMSGSIZE) 3286 goto out; 3287 } 3288 } 3289 3290 if (dev->netdev_ops->ndo_fdb_dump) 3291 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3292 dev, NULL, 3293 &fidx); 3294 else 3295 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3296 &fidx); 3297 if (err == -EMSGSIZE) 3298 goto out; 3299 3300 cops = NULL; 3301 3302 /* reset fdb offset to 0 for rest of the interfaces */ 3303 cb->args[2] = 0; 3304 fidx = 0; 3305 cont: 3306 idx++; 3307 } 3308 } 3309 3310 out: 3311 cb->args[0] = h; 3312 cb->args[1] = idx; 3313 cb->args[2] = fidx; 3314 3315 return skb->len; 3316 } 3317 3318 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3319 unsigned int attrnum, unsigned int flag) 3320 { 3321 if (mask & flag) 3322 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3323 return 0; 3324 } 3325 3326 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3327 struct net_device *dev, u16 mode, 3328 u32 flags, u32 mask, int nlflags, 3329 u32 filter_mask, 3330 int (*vlan_fill)(struct sk_buff *skb, 3331 struct net_device *dev, 3332 u32 filter_mask)) 3333 { 3334 struct nlmsghdr *nlh; 3335 struct ifinfomsg *ifm; 3336 struct nlattr *br_afspec; 3337 struct nlattr *protinfo; 3338 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3339 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3340 int err = 0; 3341 3342 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3343 if (nlh == NULL) 3344 return -EMSGSIZE; 3345 3346 ifm = nlmsg_data(nlh); 3347 ifm->ifi_family = AF_BRIDGE; 3348 ifm->__ifi_pad = 0; 3349 ifm->ifi_type = dev->type; 3350 ifm->ifi_index = dev->ifindex; 3351 ifm->ifi_flags = dev_get_flags(dev); 3352 ifm->ifi_change = 0; 3353 3354 3355 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3356 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3357 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3358 (br_dev && 3359 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3360 (dev->addr_len && 3361 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3362 (dev->ifindex != dev_get_iflink(dev) && 3363 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3364 goto nla_put_failure; 3365 3366 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3367 if (!br_afspec) 3368 goto nla_put_failure; 3369 3370 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3371 nla_nest_cancel(skb, br_afspec); 3372 goto nla_put_failure; 3373 } 3374 3375 if (mode != BRIDGE_MODE_UNDEF) { 3376 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3377 nla_nest_cancel(skb, br_afspec); 3378 goto nla_put_failure; 3379 } 3380 } 3381 if (vlan_fill) { 3382 err = vlan_fill(skb, dev, filter_mask); 3383 if (err) { 3384 nla_nest_cancel(skb, br_afspec); 3385 goto nla_put_failure; 3386 } 3387 } 3388 nla_nest_end(skb, br_afspec); 3389 3390 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3391 if (!protinfo) 3392 goto nla_put_failure; 3393 3394 if (brport_nla_put_flag(skb, flags, mask, 3395 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3396 brport_nla_put_flag(skb, flags, mask, 3397 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3398 brport_nla_put_flag(skb, flags, mask, 3399 IFLA_BRPORT_FAST_LEAVE, 3400 BR_MULTICAST_FAST_LEAVE) || 3401 brport_nla_put_flag(skb, flags, mask, 3402 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3403 brport_nla_put_flag(skb, flags, mask, 3404 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3405 brport_nla_put_flag(skb, flags, mask, 3406 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3407 brport_nla_put_flag(skb, flags, mask, 3408 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3409 brport_nla_put_flag(skb, flags, mask, 3410 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3411 nla_nest_cancel(skb, protinfo); 3412 goto nla_put_failure; 3413 } 3414 3415 nla_nest_end(skb, protinfo); 3416 3417 nlmsg_end(skb, nlh); 3418 return 0; 3419 nla_put_failure: 3420 nlmsg_cancel(skb, nlh); 3421 return err ? err : -EMSGSIZE; 3422 } 3423 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3424 3425 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3426 { 3427 struct net *net = sock_net(skb->sk); 3428 struct net_device *dev; 3429 int idx = 0; 3430 u32 portid = NETLINK_CB(cb->skb).portid; 3431 u32 seq = cb->nlh->nlmsg_seq; 3432 u32 filter_mask = 0; 3433 int err; 3434 3435 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3436 struct nlattr *extfilt; 3437 3438 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3439 IFLA_EXT_MASK); 3440 if (extfilt) { 3441 if (nla_len(extfilt) < sizeof(filter_mask)) 3442 return -EINVAL; 3443 3444 filter_mask = nla_get_u32(extfilt); 3445 } 3446 } 3447 3448 rcu_read_lock(); 3449 for_each_netdev_rcu(net, dev) { 3450 const struct net_device_ops *ops = dev->netdev_ops; 3451 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3452 3453 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3454 if (idx >= cb->args[0]) { 3455 err = br_dev->netdev_ops->ndo_bridge_getlink( 3456 skb, portid, seq, dev, 3457 filter_mask, NLM_F_MULTI); 3458 if (err < 0 && err != -EOPNOTSUPP) { 3459 if (likely(skb->len)) 3460 break; 3461 3462 goto out_err; 3463 } 3464 } 3465 idx++; 3466 } 3467 3468 if (ops->ndo_bridge_getlink) { 3469 if (idx >= cb->args[0]) { 3470 err = ops->ndo_bridge_getlink(skb, portid, 3471 seq, dev, 3472 filter_mask, 3473 NLM_F_MULTI); 3474 if (err < 0 && err != -EOPNOTSUPP) { 3475 if (likely(skb->len)) 3476 break; 3477 3478 goto out_err; 3479 } 3480 } 3481 idx++; 3482 } 3483 } 3484 err = skb->len; 3485 out_err: 3486 rcu_read_unlock(); 3487 cb->args[0] = idx; 3488 3489 return err; 3490 } 3491 3492 static inline size_t bridge_nlmsg_size(void) 3493 { 3494 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3495 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3496 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3497 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3498 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3499 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3500 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3501 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3502 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3503 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3504 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3505 } 3506 3507 static int rtnl_bridge_notify(struct net_device *dev) 3508 { 3509 struct net *net = dev_net(dev); 3510 struct sk_buff *skb; 3511 int err = -EOPNOTSUPP; 3512 3513 if (!dev->netdev_ops->ndo_bridge_getlink) 3514 return 0; 3515 3516 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3517 if (!skb) { 3518 err = -ENOMEM; 3519 goto errout; 3520 } 3521 3522 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3523 if (err < 0) 3524 goto errout; 3525 3526 if (!skb->len) 3527 goto errout; 3528 3529 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3530 return 0; 3531 errout: 3532 WARN_ON(err == -EMSGSIZE); 3533 kfree_skb(skb); 3534 if (err) 3535 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3536 return err; 3537 } 3538 3539 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh, 3540 struct netlink_ext_ack *extack) 3541 { 3542 struct net *net = sock_net(skb->sk); 3543 struct ifinfomsg *ifm; 3544 struct net_device *dev; 3545 struct nlattr *br_spec, *attr = NULL; 3546 int rem, err = -EOPNOTSUPP; 3547 u16 flags = 0; 3548 bool have_flags = false; 3549 3550 if (nlmsg_len(nlh) < sizeof(*ifm)) 3551 return -EINVAL; 3552 3553 ifm = nlmsg_data(nlh); 3554 if (ifm->ifi_family != AF_BRIDGE) 3555 return -EPFNOSUPPORT; 3556 3557 dev = __dev_get_by_index(net, ifm->ifi_index); 3558 if (!dev) { 3559 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3560 return -ENODEV; 3561 } 3562 3563 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3564 if (br_spec) { 3565 nla_for_each_nested(attr, br_spec, rem) { 3566 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3567 if (nla_len(attr) < sizeof(flags)) 3568 return -EINVAL; 3569 3570 have_flags = true; 3571 flags = nla_get_u16(attr); 3572 break; 3573 } 3574 } 3575 } 3576 3577 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3578 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3579 3580 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3581 err = -EOPNOTSUPP; 3582 goto out; 3583 } 3584 3585 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3586 if (err) 3587 goto out; 3588 3589 flags &= ~BRIDGE_FLAGS_MASTER; 3590 } 3591 3592 if ((flags & BRIDGE_FLAGS_SELF)) { 3593 if (!dev->netdev_ops->ndo_bridge_setlink) 3594 err = -EOPNOTSUPP; 3595 else 3596 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3597 flags); 3598 if (!err) { 3599 flags &= ~BRIDGE_FLAGS_SELF; 3600 3601 /* Generate event to notify upper layer of bridge 3602 * change 3603 */ 3604 err = rtnl_bridge_notify(dev); 3605 } 3606 } 3607 3608 if (have_flags) 3609 memcpy(nla_data(attr), &flags, sizeof(flags)); 3610 out: 3611 return err; 3612 } 3613 3614 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh, 3615 struct netlink_ext_ack *extack) 3616 { 3617 struct net *net = sock_net(skb->sk); 3618 struct ifinfomsg *ifm; 3619 struct net_device *dev; 3620 struct nlattr *br_spec, *attr = NULL; 3621 int rem, err = -EOPNOTSUPP; 3622 u16 flags = 0; 3623 bool have_flags = false; 3624 3625 if (nlmsg_len(nlh) < sizeof(*ifm)) 3626 return -EINVAL; 3627 3628 ifm = nlmsg_data(nlh); 3629 if (ifm->ifi_family != AF_BRIDGE) 3630 return -EPFNOSUPPORT; 3631 3632 dev = __dev_get_by_index(net, ifm->ifi_index); 3633 if (!dev) { 3634 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3635 return -ENODEV; 3636 } 3637 3638 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3639 if (br_spec) { 3640 nla_for_each_nested(attr, br_spec, rem) { 3641 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3642 if (nla_len(attr) < sizeof(flags)) 3643 return -EINVAL; 3644 3645 have_flags = true; 3646 flags = nla_get_u16(attr); 3647 break; 3648 } 3649 } 3650 } 3651 3652 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3653 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3654 3655 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3656 err = -EOPNOTSUPP; 3657 goto out; 3658 } 3659 3660 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3661 if (err) 3662 goto out; 3663 3664 flags &= ~BRIDGE_FLAGS_MASTER; 3665 } 3666 3667 if ((flags & BRIDGE_FLAGS_SELF)) { 3668 if (!dev->netdev_ops->ndo_bridge_dellink) 3669 err = -EOPNOTSUPP; 3670 else 3671 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3672 flags); 3673 3674 if (!err) { 3675 flags &= ~BRIDGE_FLAGS_SELF; 3676 3677 /* Generate event to notify upper layer of bridge 3678 * change 3679 */ 3680 err = rtnl_bridge_notify(dev); 3681 } 3682 } 3683 3684 if (have_flags) 3685 memcpy(nla_data(attr), &flags, sizeof(flags)); 3686 out: 3687 return err; 3688 } 3689 3690 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3691 { 3692 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3693 (!idxattr || idxattr == attrid); 3694 } 3695 3696 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3697 static int rtnl_get_offload_stats_attr_size(int attr_id) 3698 { 3699 switch (attr_id) { 3700 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3701 return sizeof(struct rtnl_link_stats64); 3702 } 3703 3704 return 0; 3705 } 3706 3707 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3708 int *prividx) 3709 { 3710 struct nlattr *attr = NULL; 3711 int attr_id, size; 3712 void *attr_data; 3713 int err; 3714 3715 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3716 dev->netdev_ops->ndo_get_offload_stats)) 3717 return -ENODATA; 3718 3719 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3720 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3721 if (attr_id < *prividx) 3722 continue; 3723 3724 size = rtnl_get_offload_stats_attr_size(attr_id); 3725 if (!size) 3726 continue; 3727 3728 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3729 continue; 3730 3731 attr = nla_reserve_64bit(skb, attr_id, size, 3732 IFLA_OFFLOAD_XSTATS_UNSPEC); 3733 if (!attr) 3734 goto nla_put_failure; 3735 3736 attr_data = nla_data(attr); 3737 memset(attr_data, 0, size); 3738 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3739 attr_data); 3740 if (err) 3741 goto get_offload_stats_failure; 3742 } 3743 3744 if (!attr) 3745 return -ENODATA; 3746 3747 *prividx = 0; 3748 return 0; 3749 3750 nla_put_failure: 3751 err = -EMSGSIZE; 3752 get_offload_stats_failure: 3753 *prividx = attr_id; 3754 return err; 3755 } 3756 3757 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3758 { 3759 int nla_size = 0; 3760 int attr_id; 3761 int size; 3762 3763 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3764 dev->netdev_ops->ndo_get_offload_stats)) 3765 return 0; 3766 3767 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3768 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3769 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3770 continue; 3771 size = rtnl_get_offload_stats_attr_size(attr_id); 3772 nla_size += nla_total_size_64bit(size); 3773 } 3774 3775 if (nla_size != 0) 3776 nla_size += nla_total_size(0); 3777 3778 return nla_size; 3779 } 3780 3781 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3782 int type, u32 pid, u32 seq, u32 change, 3783 unsigned int flags, unsigned int filter_mask, 3784 int *idxattr, int *prividx) 3785 { 3786 struct if_stats_msg *ifsm; 3787 struct nlmsghdr *nlh; 3788 struct nlattr *attr; 3789 int s_prividx = *prividx; 3790 int err; 3791 3792 ASSERT_RTNL(); 3793 3794 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3795 if (!nlh) 3796 return -EMSGSIZE; 3797 3798 ifsm = nlmsg_data(nlh); 3799 ifsm->ifindex = dev->ifindex; 3800 ifsm->filter_mask = filter_mask; 3801 3802 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3803 struct rtnl_link_stats64 *sp; 3804 3805 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3806 sizeof(struct rtnl_link_stats64), 3807 IFLA_STATS_UNSPEC); 3808 if (!attr) 3809 goto nla_put_failure; 3810 3811 sp = nla_data(attr); 3812 dev_get_stats(dev, sp); 3813 } 3814 3815 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3816 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3817 3818 if (ops && ops->fill_linkxstats) { 3819 *idxattr = IFLA_STATS_LINK_XSTATS; 3820 attr = nla_nest_start(skb, 3821 IFLA_STATS_LINK_XSTATS); 3822 if (!attr) 3823 goto nla_put_failure; 3824 3825 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3826 nla_nest_end(skb, attr); 3827 if (err) 3828 goto nla_put_failure; 3829 *idxattr = 0; 3830 } 3831 } 3832 3833 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3834 *idxattr)) { 3835 const struct rtnl_link_ops *ops = NULL; 3836 const struct net_device *master; 3837 3838 master = netdev_master_upper_dev_get(dev); 3839 if (master) 3840 ops = master->rtnl_link_ops; 3841 if (ops && ops->fill_linkxstats) { 3842 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3843 attr = nla_nest_start(skb, 3844 IFLA_STATS_LINK_XSTATS_SLAVE); 3845 if (!attr) 3846 goto nla_put_failure; 3847 3848 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3849 nla_nest_end(skb, attr); 3850 if (err) 3851 goto nla_put_failure; 3852 *idxattr = 0; 3853 } 3854 } 3855 3856 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 3857 *idxattr)) { 3858 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 3859 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 3860 if (!attr) 3861 goto nla_put_failure; 3862 3863 err = rtnl_get_offload_stats(skb, dev, prividx); 3864 if (err == -ENODATA) 3865 nla_nest_cancel(skb, attr); 3866 else 3867 nla_nest_end(skb, attr); 3868 3869 if (err && err != -ENODATA) 3870 goto nla_put_failure; 3871 *idxattr = 0; 3872 } 3873 3874 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 3875 struct rtnl_af_ops *af_ops; 3876 3877 *idxattr = IFLA_STATS_AF_SPEC; 3878 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC); 3879 if (!attr) 3880 goto nla_put_failure; 3881 3882 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3883 if (af_ops->fill_stats_af) { 3884 struct nlattr *af; 3885 int err; 3886 3887 af = nla_nest_start(skb, af_ops->family); 3888 if (!af) 3889 goto nla_put_failure; 3890 3891 err = af_ops->fill_stats_af(skb, dev); 3892 3893 if (err == -ENODATA) 3894 nla_nest_cancel(skb, af); 3895 else if (err < 0) 3896 goto nla_put_failure; 3897 3898 nla_nest_end(skb, af); 3899 } 3900 } 3901 3902 nla_nest_end(skb, attr); 3903 3904 *idxattr = 0; 3905 } 3906 3907 nlmsg_end(skb, nlh); 3908 3909 return 0; 3910 3911 nla_put_failure: 3912 /* not a multi message or no progress mean a real error */ 3913 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 3914 nlmsg_cancel(skb, nlh); 3915 else 3916 nlmsg_end(skb, nlh); 3917 3918 return -EMSGSIZE; 3919 } 3920 3921 static size_t if_nlmsg_stats_size(const struct net_device *dev, 3922 u32 filter_mask) 3923 { 3924 size_t size = 0; 3925 3926 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 3927 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 3928 3929 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 3930 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3931 int attr = IFLA_STATS_LINK_XSTATS; 3932 3933 if (ops && ops->get_linkxstats_size) { 3934 size += nla_total_size(ops->get_linkxstats_size(dev, 3935 attr)); 3936 /* for IFLA_STATS_LINK_XSTATS */ 3937 size += nla_total_size(0); 3938 } 3939 } 3940 3941 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 3942 struct net_device *_dev = (struct net_device *)dev; 3943 const struct rtnl_link_ops *ops = NULL; 3944 const struct net_device *master; 3945 3946 /* netdev_master_upper_dev_get can't take const */ 3947 master = netdev_master_upper_dev_get(_dev); 3948 if (master) 3949 ops = master->rtnl_link_ops; 3950 if (ops && ops->get_linkxstats_size) { 3951 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 3952 3953 size += nla_total_size(ops->get_linkxstats_size(dev, 3954 attr)); 3955 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 3956 size += nla_total_size(0); 3957 } 3958 } 3959 3960 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 3961 size += rtnl_get_offload_stats_size(dev); 3962 3963 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 3964 struct rtnl_af_ops *af_ops; 3965 3966 /* for IFLA_STATS_AF_SPEC */ 3967 size += nla_total_size(0); 3968 3969 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3970 if (af_ops->get_stats_af_size) { 3971 size += nla_total_size( 3972 af_ops->get_stats_af_size(dev)); 3973 3974 /* for AF_* */ 3975 size += nla_total_size(0); 3976 } 3977 } 3978 } 3979 3980 return size; 3981 } 3982 3983 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh, 3984 struct netlink_ext_ack *extack) 3985 { 3986 struct net *net = sock_net(skb->sk); 3987 struct net_device *dev = NULL; 3988 int idxattr = 0, prividx = 0; 3989 struct if_stats_msg *ifsm; 3990 struct sk_buff *nskb; 3991 u32 filter_mask; 3992 int err; 3993 3994 if (nlmsg_len(nlh) < sizeof(*ifsm)) 3995 return -EINVAL; 3996 3997 ifsm = nlmsg_data(nlh); 3998 if (ifsm->ifindex > 0) 3999 dev = __dev_get_by_index(net, ifsm->ifindex); 4000 else 4001 return -EINVAL; 4002 4003 if (!dev) 4004 return -ENODEV; 4005 4006 filter_mask = ifsm->filter_mask; 4007 if (!filter_mask) 4008 return -EINVAL; 4009 4010 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 4011 if (!nskb) 4012 return -ENOBUFS; 4013 4014 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 4015 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 4016 0, filter_mask, &idxattr, &prividx); 4017 if (err < 0) { 4018 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 4019 WARN_ON(err == -EMSGSIZE); 4020 kfree_skb(nskb); 4021 } else { 4022 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 4023 } 4024 4025 return err; 4026 } 4027 4028 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 4029 { 4030 int h, s_h, err, s_idx, s_idxattr, s_prividx; 4031 struct net *net = sock_net(skb->sk); 4032 unsigned int flags = NLM_F_MULTI; 4033 struct if_stats_msg *ifsm; 4034 struct hlist_head *head; 4035 struct net_device *dev; 4036 u32 filter_mask = 0; 4037 int idx = 0; 4038 4039 s_h = cb->args[0]; 4040 s_idx = cb->args[1]; 4041 s_idxattr = cb->args[2]; 4042 s_prividx = cb->args[3]; 4043 4044 cb->seq = net->dev_base_seq; 4045 4046 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) 4047 return -EINVAL; 4048 4049 ifsm = nlmsg_data(cb->nlh); 4050 filter_mask = ifsm->filter_mask; 4051 if (!filter_mask) 4052 return -EINVAL; 4053 4054 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4055 idx = 0; 4056 head = &net->dev_index_head[h]; 4057 hlist_for_each_entry(dev, head, index_hlist) { 4058 if (idx < s_idx) 4059 goto cont; 4060 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 4061 NETLINK_CB(cb->skb).portid, 4062 cb->nlh->nlmsg_seq, 0, 4063 flags, filter_mask, 4064 &s_idxattr, &s_prividx); 4065 /* If we ran out of room on the first message, 4066 * we're in trouble 4067 */ 4068 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 4069 4070 if (err < 0) 4071 goto out; 4072 s_prividx = 0; 4073 s_idxattr = 0; 4074 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 4075 cont: 4076 idx++; 4077 } 4078 } 4079 out: 4080 cb->args[3] = s_prividx; 4081 cb->args[2] = s_idxattr; 4082 cb->args[1] = idx; 4083 cb->args[0] = h; 4084 4085 return skb->len; 4086 } 4087 4088 /* Process one rtnetlink message. */ 4089 4090 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, 4091 struct netlink_ext_ack *extack) 4092 { 4093 struct net *net = sock_net(skb->sk); 4094 rtnl_doit_func doit; 4095 int kind; 4096 int family; 4097 int type; 4098 int err; 4099 4100 type = nlh->nlmsg_type; 4101 if (type > RTM_MAX) 4102 return -EOPNOTSUPP; 4103 4104 type -= RTM_BASE; 4105 4106 /* All the messages must have at least 1 byte length */ 4107 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 4108 return 0; 4109 4110 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 4111 kind = type&3; 4112 4113 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 4114 return -EPERM; 4115 4116 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 4117 struct sock *rtnl; 4118 rtnl_dumpit_func dumpit; 4119 rtnl_calcit_func calcit; 4120 u16 min_dump_alloc = 0; 4121 4122 dumpit = rtnl_get_dumpit(family, type); 4123 if (dumpit == NULL) 4124 return -EOPNOTSUPP; 4125 calcit = rtnl_get_calcit(family, type); 4126 if (calcit) 4127 min_dump_alloc = calcit(skb, nlh); 4128 4129 __rtnl_unlock(); 4130 rtnl = net->rtnl; 4131 { 4132 struct netlink_dump_control c = { 4133 .dump = dumpit, 4134 .min_dump_alloc = min_dump_alloc, 4135 }; 4136 err = netlink_dump_start(rtnl, skb, nlh, &c); 4137 } 4138 rtnl_lock(); 4139 return err; 4140 } 4141 4142 doit = rtnl_get_doit(family, type); 4143 if (doit == NULL) 4144 return -EOPNOTSUPP; 4145 4146 return doit(skb, nlh, extack); 4147 } 4148 4149 static void rtnetlink_rcv(struct sk_buff *skb) 4150 { 4151 rtnl_lock(); 4152 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4153 rtnl_unlock(); 4154 } 4155 4156 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4157 { 4158 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4159 4160 switch (event) { 4161 case NETDEV_REBOOT: 4162 case NETDEV_CHANGENAME: 4163 case NETDEV_FEAT_CHANGE: 4164 case NETDEV_BONDING_FAILOVER: 4165 case NETDEV_NOTIFY_PEERS: 4166 case NETDEV_RESEND_IGMP: 4167 case NETDEV_CHANGEINFODATA: 4168 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 4169 break; 4170 default: 4171 break; 4172 } 4173 return NOTIFY_DONE; 4174 } 4175 4176 static struct notifier_block rtnetlink_dev_notifier = { 4177 .notifier_call = rtnetlink_event, 4178 }; 4179 4180 4181 static int __net_init rtnetlink_net_init(struct net *net) 4182 { 4183 struct sock *sk; 4184 struct netlink_kernel_cfg cfg = { 4185 .groups = RTNLGRP_MAX, 4186 .input = rtnetlink_rcv, 4187 .cb_mutex = &rtnl_mutex, 4188 .flags = NL_CFG_F_NONROOT_RECV, 4189 }; 4190 4191 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4192 if (!sk) 4193 return -ENOMEM; 4194 net->rtnl = sk; 4195 return 0; 4196 } 4197 4198 static void __net_exit rtnetlink_net_exit(struct net *net) 4199 { 4200 netlink_kernel_release(net->rtnl); 4201 net->rtnl = NULL; 4202 } 4203 4204 static struct pernet_operations rtnetlink_net_ops = { 4205 .init = rtnetlink_net_init, 4206 .exit = rtnetlink_net_exit, 4207 }; 4208 4209 void __init rtnetlink_init(void) 4210 { 4211 if (register_pernet_subsys(&rtnetlink_net_ops)) 4212 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4213 4214 register_netdevice_notifier(&rtnetlink_dev_notifier); 4215 4216 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4217 rtnl_dump_ifinfo, rtnl_calcit); 4218 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 4219 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 4220 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 4221 4222 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 4223 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 4224 rtnl_register(PF_UNSPEC, RTM_GETNETCONF, NULL, rtnl_dump_all, NULL); 4225 4226 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 4227 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 4228 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 4229 4230 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 4231 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 4232 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 4233 4234 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4235 NULL); 4236 } 4237