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(sizeof(struct ifla_port_vsi)) 880 /* PORT_VSI_TYPE */ 881 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 882 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 883 + nla_total_size(1) /* PROT_VDP_REQUEST */ 884 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 885 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 886 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 887 + port_size; 888 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 889 + port_size; 890 891 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 892 !(ext_filter_mask & RTEXT_FILTER_VF)) 893 return 0; 894 if (dev_num_vf(dev->dev.parent)) 895 return port_self_size + vf_ports_size + 896 vf_port_size * dev_num_vf(dev->dev.parent); 897 else 898 return port_self_size; 899 } 900 901 static size_t rtnl_xdp_size(const struct net_device *dev) 902 { 903 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ 904 nla_total_size(1); /* XDP_ATTACHED */ 905 906 if (!dev->netdev_ops->ndo_xdp) 907 return 0; 908 else 909 return xdp_size; 910 } 911 912 static noinline size_t if_nlmsg_size(const struct net_device *dev, 913 u32 ext_filter_mask) 914 { 915 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 916 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 917 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 918 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 919 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 920 + nla_total_size(sizeof(struct rtnl_link_stats)) 921 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 922 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 923 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 924 + nla_total_size(4) /* IFLA_TXQLEN */ 925 + nla_total_size(4) /* IFLA_WEIGHT */ 926 + nla_total_size(4) /* IFLA_MTU */ 927 + nla_total_size(4) /* IFLA_LINK */ 928 + nla_total_size(4) /* IFLA_MASTER */ 929 + nla_total_size(1) /* IFLA_CARRIER */ 930 + nla_total_size(4) /* IFLA_PROMISCUITY */ 931 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 932 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 933 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 934 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 935 + nla_total_size(1) /* IFLA_OPERSTATE */ 936 + nla_total_size(1) /* IFLA_LINKMODE */ 937 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 938 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 939 + nla_total_size(ext_filter_mask 940 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 941 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 942 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 943 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 944 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 945 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 946 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 947 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 948 + rtnl_xdp_size(dev) /* IFLA_XDP */ 949 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 950 951 } 952 953 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 954 { 955 struct nlattr *vf_ports; 956 struct nlattr *vf_port; 957 int vf; 958 int err; 959 960 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 961 if (!vf_ports) 962 return -EMSGSIZE; 963 964 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 965 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 966 if (!vf_port) 967 goto nla_put_failure; 968 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 969 goto nla_put_failure; 970 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 971 if (err == -EMSGSIZE) 972 goto nla_put_failure; 973 if (err) { 974 nla_nest_cancel(skb, vf_port); 975 continue; 976 } 977 nla_nest_end(skb, vf_port); 978 } 979 980 nla_nest_end(skb, vf_ports); 981 982 return 0; 983 984 nla_put_failure: 985 nla_nest_cancel(skb, vf_ports); 986 return -EMSGSIZE; 987 } 988 989 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 990 { 991 struct nlattr *port_self; 992 int err; 993 994 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 995 if (!port_self) 996 return -EMSGSIZE; 997 998 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 999 if (err) { 1000 nla_nest_cancel(skb, port_self); 1001 return (err == -EMSGSIZE) ? err : 0; 1002 } 1003 1004 nla_nest_end(skb, port_self); 1005 1006 return 0; 1007 } 1008 1009 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1010 u32 ext_filter_mask) 1011 { 1012 int err; 1013 1014 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1015 !(ext_filter_mask & RTEXT_FILTER_VF)) 1016 return 0; 1017 1018 err = rtnl_port_self_fill(skb, dev); 1019 if (err) 1020 return err; 1021 1022 if (dev_num_vf(dev->dev.parent)) { 1023 err = rtnl_vf_ports_fill(skb, dev); 1024 if (err) 1025 return err; 1026 } 1027 1028 return 0; 1029 } 1030 1031 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1032 { 1033 int err; 1034 struct netdev_phys_item_id ppid; 1035 1036 err = dev_get_phys_port_id(dev, &ppid); 1037 if (err) { 1038 if (err == -EOPNOTSUPP) 1039 return 0; 1040 return err; 1041 } 1042 1043 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1044 return -EMSGSIZE; 1045 1046 return 0; 1047 } 1048 1049 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1050 { 1051 char name[IFNAMSIZ]; 1052 int err; 1053 1054 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1055 if (err) { 1056 if (err == -EOPNOTSUPP) 1057 return 0; 1058 return err; 1059 } 1060 1061 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 1062 return -EMSGSIZE; 1063 1064 return 0; 1065 } 1066 1067 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1068 { 1069 int err; 1070 struct switchdev_attr attr = { 1071 .orig_dev = dev, 1072 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1073 .flags = SWITCHDEV_F_NO_RECURSE, 1074 }; 1075 1076 err = switchdev_port_attr_get(dev, &attr); 1077 if (err) { 1078 if (err == -EOPNOTSUPP) 1079 return 0; 1080 return err; 1081 } 1082 1083 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1084 attr.u.ppid.id)) 1085 return -EMSGSIZE; 1086 1087 return 0; 1088 } 1089 1090 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1091 struct net_device *dev) 1092 { 1093 struct rtnl_link_stats64 *sp; 1094 struct nlattr *attr; 1095 1096 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1097 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1098 if (!attr) 1099 return -EMSGSIZE; 1100 1101 sp = nla_data(attr); 1102 dev_get_stats(dev, sp); 1103 1104 attr = nla_reserve(skb, IFLA_STATS, 1105 sizeof(struct rtnl_link_stats)); 1106 if (!attr) 1107 return -EMSGSIZE; 1108 1109 copy_rtnl_link_stats(nla_data(attr), sp); 1110 1111 return 0; 1112 } 1113 1114 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1115 struct net_device *dev, 1116 int vfs_num, 1117 struct nlattr *vfinfo) 1118 { 1119 struct ifla_vf_rss_query_en vf_rss_query_en; 1120 struct nlattr *vf, *vfstats, *vfvlanlist; 1121 struct ifla_vf_link_state vf_linkstate; 1122 struct ifla_vf_vlan_info vf_vlan_info; 1123 struct ifla_vf_spoofchk vf_spoofchk; 1124 struct ifla_vf_tx_rate vf_tx_rate; 1125 struct ifla_vf_stats vf_stats; 1126 struct ifla_vf_trust vf_trust; 1127 struct ifla_vf_vlan vf_vlan; 1128 struct ifla_vf_rate vf_rate; 1129 struct ifla_vf_mac vf_mac; 1130 struct ifla_vf_info ivi; 1131 1132 /* Not all SR-IOV capable drivers support the 1133 * spoofcheck and "RSS query enable" query. Preset to 1134 * -1 so the user space tool can detect that the driver 1135 * didn't report anything. 1136 */ 1137 ivi.spoofchk = -1; 1138 ivi.rss_query_en = -1; 1139 ivi.trusted = -1; 1140 memset(ivi.mac, 0, sizeof(ivi.mac)); 1141 /* The default value for VF link state is "auto" 1142 * IFLA_VF_LINK_STATE_AUTO which equals zero 1143 */ 1144 ivi.linkstate = 0; 1145 /* VLAN Protocol by default is 802.1Q */ 1146 ivi.vlan_proto = htons(ETH_P_8021Q); 1147 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1148 return 0; 1149 1150 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1151 1152 vf_mac.vf = 1153 vf_vlan.vf = 1154 vf_vlan_info.vf = 1155 vf_rate.vf = 1156 vf_tx_rate.vf = 1157 vf_spoofchk.vf = 1158 vf_linkstate.vf = 1159 vf_rss_query_en.vf = 1160 vf_trust.vf = ivi.vf; 1161 1162 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1163 vf_vlan.vlan = ivi.vlan; 1164 vf_vlan.qos = ivi.qos; 1165 vf_vlan_info.vlan = ivi.vlan; 1166 vf_vlan_info.qos = ivi.qos; 1167 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1168 vf_tx_rate.rate = ivi.max_tx_rate; 1169 vf_rate.min_tx_rate = ivi.min_tx_rate; 1170 vf_rate.max_tx_rate = ivi.max_tx_rate; 1171 vf_spoofchk.setting = ivi.spoofchk; 1172 vf_linkstate.link_state = ivi.linkstate; 1173 vf_rss_query_en.setting = ivi.rss_query_en; 1174 vf_trust.setting = ivi.trusted; 1175 vf = nla_nest_start(skb, IFLA_VF_INFO); 1176 if (!vf) 1177 goto nla_put_vfinfo_failure; 1178 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1179 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1180 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1181 &vf_rate) || 1182 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1183 &vf_tx_rate) || 1184 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1185 &vf_spoofchk) || 1186 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1187 &vf_linkstate) || 1188 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1189 sizeof(vf_rss_query_en), 1190 &vf_rss_query_en) || 1191 nla_put(skb, IFLA_VF_TRUST, 1192 sizeof(vf_trust), &vf_trust)) 1193 goto nla_put_vf_failure; 1194 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST); 1195 if (!vfvlanlist) 1196 goto nla_put_vf_failure; 1197 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1198 &vf_vlan_info)) { 1199 nla_nest_cancel(skb, vfvlanlist); 1200 goto nla_put_vf_failure; 1201 } 1202 nla_nest_end(skb, vfvlanlist); 1203 memset(&vf_stats, 0, sizeof(vf_stats)); 1204 if (dev->netdev_ops->ndo_get_vf_stats) 1205 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1206 &vf_stats); 1207 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1208 if (!vfstats) 1209 goto nla_put_vf_failure; 1210 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1211 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1213 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1215 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1217 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1218 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1219 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1220 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1221 vf_stats.multicast, IFLA_VF_STATS_PAD)) { 1222 nla_nest_cancel(skb, vfstats); 1223 goto nla_put_vf_failure; 1224 } 1225 nla_nest_end(skb, vfstats); 1226 nla_nest_end(skb, vf); 1227 return 0; 1228 1229 nla_put_vf_failure: 1230 nla_nest_cancel(skb, vf); 1231 nla_put_vfinfo_failure: 1232 nla_nest_cancel(skb, vfinfo); 1233 return -EMSGSIZE; 1234 } 1235 1236 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1237 { 1238 struct rtnl_link_ifmap map; 1239 1240 memset(&map, 0, sizeof(map)); 1241 map.mem_start = dev->mem_start; 1242 map.mem_end = dev->mem_end; 1243 map.base_addr = dev->base_addr; 1244 map.irq = dev->irq; 1245 map.dma = dev->dma; 1246 map.port = dev->if_port; 1247 1248 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1249 return -EMSGSIZE; 1250 1251 return 0; 1252 } 1253 1254 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1255 { 1256 struct netdev_xdp xdp_op = {}; 1257 struct nlattr *xdp; 1258 int err; 1259 1260 if (!dev->netdev_ops->ndo_xdp) 1261 return 0; 1262 xdp = nla_nest_start(skb, IFLA_XDP); 1263 if (!xdp) 1264 return -EMSGSIZE; 1265 xdp_op.command = XDP_QUERY_PROG; 1266 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op); 1267 if (err) 1268 goto err_cancel; 1269 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached); 1270 if (err) 1271 goto err_cancel; 1272 1273 nla_nest_end(skb, xdp); 1274 return 0; 1275 1276 err_cancel: 1277 nla_nest_cancel(skb, xdp); 1278 return err; 1279 } 1280 1281 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1282 int type, u32 pid, u32 seq, u32 change, 1283 unsigned int flags, u32 ext_filter_mask) 1284 { 1285 struct ifinfomsg *ifm; 1286 struct nlmsghdr *nlh; 1287 struct nlattr *af_spec; 1288 struct rtnl_af_ops *af_ops; 1289 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1290 1291 ASSERT_RTNL(); 1292 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1293 if (nlh == NULL) 1294 return -EMSGSIZE; 1295 1296 ifm = nlmsg_data(nlh); 1297 ifm->ifi_family = AF_UNSPEC; 1298 ifm->__ifi_pad = 0; 1299 ifm->ifi_type = dev->type; 1300 ifm->ifi_index = dev->ifindex; 1301 ifm->ifi_flags = dev_get_flags(dev); 1302 ifm->ifi_change = change; 1303 1304 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1305 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1306 nla_put_u8(skb, IFLA_OPERSTATE, 1307 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1308 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1309 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1310 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1311 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1312 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1313 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1314 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1315 #ifdef CONFIG_RPS 1316 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1317 #endif 1318 (dev->ifindex != dev_get_iflink(dev) && 1319 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1320 (upper_dev && 1321 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1322 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1323 (dev->qdisc && 1324 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1325 (dev->ifalias && 1326 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1327 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1328 atomic_read(&dev->carrier_changes)) || 1329 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1330 goto nla_put_failure; 1331 1332 if (rtnl_fill_link_ifmap(skb, dev)) 1333 goto nla_put_failure; 1334 1335 if (dev->addr_len) { 1336 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1337 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1338 goto nla_put_failure; 1339 } 1340 1341 if (rtnl_phys_port_id_fill(skb, dev)) 1342 goto nla_put_failure; 1343 1344 if (rtnl_phys_port_name_fill(skb, dev)) 1345 goto nla_put_failure; 1346 1347 if (rtnl_phys_switch_id_fill(skb, dev)) 1348 goto nla_put_failure; 1349 1350 if (rtnl_fill_stats(skb, dev)) 1351 goto nla_put_failure; 1352 1353 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1354 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1355 goto nla_put_failure; 1356 1357 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1358 ext_filter_mask & RTEXT_FILTER_VF) { 1359 int i; 1360 struct nlattr *vfinfo; 1361 int num_vfs = dev_num_vf(dev->dev.parent); 1362 1363 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1364 if (!vfinfo) 1365 goto nla_put_failure; 1366 for (i = 0; i < num_vfs; i++) { 1367 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1368 goto nla_put_failure; 1369 } 1370 1371 nla_nest_end(skb, vfinfo); 1372 } 1373 1374 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1375 goto nla_put_failure; 1376 1377 if (rtnl_xdp_fill(skb, dev)) 1378 goto nla_put_failure; 1379 1380 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1381 if (rtnl_link_fill(skb, dev) < 0) 1382 goto nla_put_failure; 1383 } 1384 1385 if (dev->rtnl_link_ops && 1386 dev->rtnl_link_ops->get_link_net) { 1387 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1388 1389 if (!net_eq(dev_net(dev), link_net)) { 1390 int id = peernet2id_alloc(dev_net(dev), link_net); 1391 1392 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1393 goto nla_put_failure; 1394 } 1395 } 1396 1397 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1398 goto nla_put_failure; 1399 1400 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1401 if (af_ops->fill_link_af) { 1402 struct nlattr *af; 1403 int err; 1404 1405 if (!(af = nla_nest_start(skb, af_ops->family))) 1406 goto nla_put_failure; 1407 1408 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1409 1410 /* 1411 * Caller may return ENODATA to indicate that there 1412 * was no data to be dumped. This is not an error, it 1413 * means we should trim the attribute header and 1414 * continue. 1415 */ 1416 if (err == -ENODATA) 1417 nla_nest_cancel(skb, af); 1418 else if (err < 0) 1419 goto nla_put_failure; 1420 1421 nla_nest_end(skb, af); 1422 } 1423 } 1424 1425 nla_nest_end(skb, af_spec); 1426 1427 nlmsg_end(skb, nlh); 1428 return 0; 1429 1430 nla_put_failure: 1431 nlmsg_cancel(skb, nlh); 1432 return -EMSGSIZE; 1433 } 1434 1435 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1436 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1437 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1438 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1439 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1440 [IFLA_MTU] = { .type = NLA_U32 }, 1441 [IFLA_LINK] = { .type = NLA_U32 }, 1442 [IFLA_MASTER] = { .type = NLA_U32 }, 1443 [IFLA_CARRIER] = { .type = NLA_U8 }, 1444 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1445 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1446 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1447 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1448 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1449 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1450 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1451 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1452 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1453 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1454 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1455 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1456 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1457 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1458 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1459 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1460 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1461 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1462 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1463 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1464 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1465 [IFLA_XDP] = { .type = NLA_NESTED }, 1466 }; 1467 1468 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1469 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1470 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1471 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1472 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1473 }; 1474 1475 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1476 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1477 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1478 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1479 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1480 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1481 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1482 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1483 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1484 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1485 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1486 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1487 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1488 }; 1489 1490 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1491 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1492 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1493 .len = PORT_PROFILE_MAX }, 1494 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1495 .len = sizeof(struct ifla_port_vsi)}, 1496 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1497 .len = PORT_UUID_MAX }, 1498 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1499 .len = PORT_UUID_MAX }, 1500 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1501 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1502 }; 1503 1504 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1505 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1506 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1507 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1508 }; 1509 1510 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1511 { 1512 const struct rtnl_link_ops *ops = NULL; 1513 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1514 1515 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0) 1516 return NULL; 1517 1518 if (linfo[IFLA_INFO_KIND]) { 1519 char kind[MODULE_NAME_LEN]; 1520 1521 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1522 ops = rtnl_link_ops_get(kind); 1523 } 1524 1525 return ops; 1526 } 1527 1528 static bool link_master_filtered(struct net_device *dev, int master_idx) 1529 { 1530 struct net_device *master; 1531 1532 if (!master_idx) 1533 return false; 1534 1535 master = netdev_master_upper_dev_get(dev); 1536 if (!master || master->ifindex != master_idx) 1537 return true; 1538 1539 return false; 1540 } 1541 1542 static bool link_kind_filtered(const struct net_device *dev, 1543 const struct rtnl_link_ops *kind_ops) 1544 { 1545 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1546 return true; 1547 1548 return false; 1549 } 1550 1551 static bool link_dump_filtered(struct net_device *dev, 1552 int master_idx, 1553 const struct rtnl_link_ops *kind_ops) 1554 { 1555 if (link_master_filtered(dev, master_idx) || 1556 link_kind_filtered(dev, kind_ops)) 1557 return true; 1558 1559 return false; 1560 } 1561 1562 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1563 { 1564 struct net *net = sock_net(skb->sk); 1565 int h, s_h; 1566 int idx = 0, s_idx; 1567 struct net_device *dev; 1568 struct hlist_head *head; 1569 struct nlattr *tb[IFLA_MAX+1]; 1570 u32 ext_filter_mask = 0; 1571 const struct rtnl_link_ops *kind_ops = NULL; 1572 unsigned int flags = NLM_F_MULTI; 1573 int master_idx = 0; 1574 int err; 1575 int hdrlen; 1576 1577 s_h = cb->args[0]; 1578 s_idx = cb->args[1]; 1579 1580 cb->seq = net->dev_base_seq; 1581 1582 /* A hack to preserve kernel<->userspace interface. 1583 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1584 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1585 * what iproute2 < v3.9.0 used. 1586 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1587 * attribute, its netlink message is shorter than struct ifinfomsg. 1588 */ 1589 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1590 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1591 1592 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1593 1594 if (tb[IFLA_EXT_MASK]) 1595 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1596 1597 if (tb[IFLA_MASTER]) 1598 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1599 1600 if (tb[IFLA_LINKINFO]) 1601 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1602 1603 if (master_idx || kind_ops) 1604 flags |= NLM_F_DUMP_FILTERED; 1605 } 1606 1607 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1608 idx = 0; 1609 head = &net->dev_index_head[h]; 1610 hlist_for_each_entry(dev, head, index_hlist) { 1611 if (link_dump_filtered(dev, master_idx, kind_ops)) 1612 goto cont; 1613 if (idx < s_idx) 1614 goto cont; 1615 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1616 NETLINK_CB(cb->skb).portid, 1617 cb->nlh->nlmsg_seq, 0, 1618 flags, 1619 ext_filter_mask); 1620 /* If we ran out of room on the first message, 1621 * we're in trouble 1622 */ 1623 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1624 1625 if (err < 0) 1626 goto out; 1627 1628 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1629 cont: 1630 idx++; 1631 } 1632 } 1633 out: 1634 cb->args[1] = idx; 1635 cb->args[0] = h; 1636 1637 return skb->len; 1638 } 1639 1640 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1641 { 1642 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1643 } 1644 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1645 1646 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1647 { 1648 struct net *net; 1649 /* Examine the link attributes and figure out which 1650 * network namespace we are talking about. 1651 */ 1652 if (tb[IFLA_NET_NS_PID]) 1653 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1654 else if (tb[IFLA_NET_NS_FD]) 1655 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1656 else 1657 net = get_net(src_net); 1658 return net; 1659 } 1660 EXPORT_SYMBOL(rtnl_link_get_net); 1661 1662 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1663 { 1664 if (dev) { 1665 if (tb[IFLA_ADDRESS] && 1666 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1667 return -EINVAL; 1668 1669 if (tb[IFLA_BROADCAST] && 1670 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1671 return -EINVAL; 1672 } 1673 1674 if (tb[IFLA_AF_SPEC]) { 1675 struct nlattr *af; 1676 int rem, err; 1677 1678 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1679 const struct rtnl_af_ops *af_ops; 1680 1681 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1682 return -EAFNOSUPPORT; 1683 1684 if (!af_ops->set_link_af) 1685 return -EOPNOTSUPP; 1686 1687 if (af_ops->validate_link_af) { 1688 err = af_ops->validate_link_af(dev, af); 1689 if (err < 0) 1690 return err; 1691 } 1692 } 1693 } 1694 1695 return 0; 1696 } 1697 1698 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1699 int guid_type) 1700 { 1701 const struct net_device_ops *ops = dev->netdev_ops; 1702 1703 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1704 } 1705 1706 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1707 { 1708 if (dev->type != ARPHRD_INFINIBAND) 1709 return -EOPNOTSUPP; 1710 1711 return handle_infiniband_guid(dev, ivt, guid_type); 1712 } 1713 1714 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1715 { 1716 const struct net_device_ops *ops = dev->netdev_ops; 1717 int err = -EINVAL; 1718 1719 if (tb[IFLA_VF_MAC]) { 1720 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1721 1722 err = -EOPNOTSUPP; 1723 if (ops->ndo_set_vf_mac) 1724 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1725 ivm->mac); 1726 if (err < 0) 1727 return err; 1728 } 1729 1730 if (tb[IFLA_VF_VLAN]) { 1731 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1732 1733 err = -EOPNOTSUPP; 1734 if (ops->ndo_set_vf_vlan) 1735 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1736 ivv->qos, 1737 htons(ETH_P_8021Q)); 1738 if (err < 0) 1739 return err; 1740 } 1741 1742 if (tb[IFLA_VF_VLAN_LIST]) { 1743 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 1744 struct nlattr *attr; 1745 int rem, len = 0; 1746 1747 err = -EOPNOTSUPP; 1748 if (!ops->ndo_set_vf_vlan) 1749 return err; 1750 1751 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 1752 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 1753 nla_len(attr) < NLA_HDRLEN) { 1754 return -EINVAL; 1755 } 1756 if (len >= MAX_VLAN_LIST_LEN) 1757 return -EOPNOTSUPP; 1758 ivvl[len] = nla_data(attr); 1759 1760 len++; 1761 } 1762 if (len == 0) 1763 return -EINVAL; 1764 1765 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 1766 ivvl[0]->qos, ivvl[0]->vlan_proto); 1767 if (err < 0) 1768 return err; 1769 } 1770 1771 if (tb[IFLA_VF_TX_RATE]) { 1772 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1773 struct ifla_vf_info ivf; 1774 1775 err = -EOPNOTSUPP; 1776 if (ops->ndo_get_vf_config) 1777 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1778 if (err < 0) 1779 return err; 1780 1781 err = -EOPNOTSUPP; 1782 if (ops->ndo_set_vf_rate) 1783 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1784 ivf.min_tx_rate, 1785 ivt->rate); 1786 if (err < 0) 1787 return err; 1788 } 1789 1790 if (tb[IFLA_VF_RATE]) { 1791 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1792 1793 err = -EOPNOTSUPP; 1794 if (ops->ndo_set_vf_rate) 1795 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1796 ivt->min_tx_rate, 1797 ivt->max_tx_rate); 1798 if (err < 0) 1799 return err; 1800 } 1801 1802 if (tb[IFLA_VF_SPOOFCHK]) { 1803 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1804 1805 err = -EOPNOTSUPP; 1806 if (ops->ndo_set_vf_spoofchk) 1807 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1808 ivs->setting); 1809 if (err < 0) 1810 return err; 1811 } 1812 1813 if (tb[IFLA_VF_LINK_STATE]) { 1814 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1815 1816 err = -EOPNOTSUPP; 1817 if (ops->ndo_set_vf_link_state) 1818 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1819 ivl->link_state); 1820 if (err < 0) 1821 return err; 1822 } 1823 1824 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1825 struct ifla_vf_rss_query_en *ivrssq_en; 1826 1827 err = -EOPNOTSUPP; 1828 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1829 if (ops->ndo_set_vf_rss_query_en) 1830 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1831 ivrssq_en->setting); 1832 if (err < 0) 1833 return err; 1834 } 1835 1836 if (tb[IFLA_VF_TRUST]) { 1837 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1838 1839 err = -EOPNOTSUPP; 1840 if (ops->ndo_set_vf_trust) 1841 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1842 if (err < 0) 1843 return err; 1844 } 1845 1846 if (tb[IFLA_VF_IB_NODE_GUID]) { 1847 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1848 1849 if (!ops->ndo_set_vf_guid) 1850 return -EOPNOTSUPP; 1851 1852 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1853 } 1854 1855 if (tb[IFLA_VF_IB_PORT_GUID]) { 1856 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1857 1858 if (!ops->ndo_set_vf_guid) 1859 return -EOPNOTSUPP; 1860 1861 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1862 } 1863 1864 return err; 1865 } 1866 1867 static int do_set_master(struct net_device *dev, int ifindex) 1868 { 1869 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1870 const struct net_device_ops *ops; 1871 int err; 1872 1873 if (upper_dev) { 1874 if (upper_dev->ifindex == ifindex) 1875 return 0; 1876 ops = upper_dev->netdev_ops; 1877 if (ops->ndo_del_slave) { 1878 err = ops->ndo_del_slave(upper_dev, dev); 1879 if (err) 1880 return err; 1881 } else { 1882 return -EOPNOTSUPP; 1883 } 1884 } 1885 1886 if (ifindex) { 1887 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1888 if (!upper_dev) 1889 return -EINVAL; 1890 ops = upper_dev->netdev_ops; 1891 if (ops->ndo_add_slave) { 1892 err = ops->ndo_add_slave(upper_dev, dev); 1893 if (err) 1894 return err; 1895 } else { 1896 return -EOPNOTSUPP; 1897 } 1898 } 1899 return 0; 1900 } 1901 1902 #define DO_SETLINK_MODIFIED 0x01 1903 /* notify flag means notify + modified. */ 1904 #define DO_SETLINK_NOTIFY 0x03 1905 static int do_setlink(const struct sk_buff *skb, 1906 struct net_device *dev, struct ifinfomsg *ifm, 1907 struct nlattr **tb, char *ifname, int status) 1908 { 1909 const struct net_device_ops *ops = dev->netdev_ops; 1910 int err; 1911 1912 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1913 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1914 if (IS_ERR(net)) { 1915 err = PTR_ERR(net); 1916 goto errout; 1917 } 1918 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1919 put_net(net); 1920 err = -EPERM; 1921 goto errout; 1922 } 1923 err = dev_change_net_namespace(dev, net, ifname); 1924 put_net(net); 1925 if (err) 1926 goto errout; 1927 status |= DO_SETLINK_MODIFIED; 1928 } 1929 1930 if (tb[IFLA_MAP]) { 1931 struct rtnl_link_ifmap *u_map; 1932 struct ifmap k_map; 1933 1934 if (!ops->ndo_set_config) { 1935 err = -EOPNOTSUPP; 1936 goto errout; 1937 } 1938 1939 if (!netif_device_present(dev)) { 1940 err = -ENODEV; 1941 goto errout; 1942 } 1943 1944 u_map = nla_data(tb[IFLA_MAP]); 1945 k_map.mem_start = (unsigned long) u_map->mem_start; 1946 k_map.mem_end = (unsigned long) u_map->mem_end; 1947 k_map.base_addr = (unsigned short) u_map->base_addr; 1948 k_map.irq = (unsigned char) u_map->irq; 1949 k_map.dma = (unsigned char) u_map->dma; 1950 k_map.port = (unsigned char) u_map->port; 1951 1952 err = ops->ndo_set_config(dev, &k_map); 1953 if (err < 0) 1954 goto errout; 1955 1956 status |= DO_SETLINK_NOTIFY; 1957 } 1958 1959 if (tb[IFLA_ADDRESS]) { 1960 struct sockaddr *sa; 1961 int len; 1962 1963 len = sizeof(sa_family_t) + dev->addr_len; 1964 sa = kmalloc(len, GFP_KERNEL); 1965 if (!sa) { 1966 err = -ENOMEM; 1967 goto errout; 1968 } 1969 sa->sa_family = dev->type; 1970 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1971 dev->addr_len); 1972 err = dev_set_mac_address(dev, sa); 1973 kfree(sa); 1974 if (err) 1975 goto errout; 1976 status |= DO_SETLINK_MODIFIED; 1977 } 1978 1979 if (tb[IFLA_MTU]) { 1980 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1981 if (err < 0) 1982 goto errout; 1983 status |= DO_SETLINK_MODIFIED; 1984 } 1985 1986 if (tb[IFLA_GROUP]) { 1987 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1988 status |= DO_SETLINK_NOTIFY; 1989 } 1990 1991 /* 1992 * Interface selected by interface index but interface 1993 * name provided implies that a name change has been 1994 * requested. 1995 */ 1996 if (ifm->ifi_index > 0 && ifname[0]) { 1997 err = dev_change_name(dev, ifname); 1998 if (err < 0) 1999 goto errout; 2000 status |= DO_SETLINK_MODIFIED; 2001 } 2002 2003 if (tb[IFLA_IFALIAS]) { 2004 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2005 nla_len(tb[IFLA_IFALIAS])); 2006 if (err < 0) 2007 goto errout; 2008 status |= DO_SETLINK_NOTIFY; 2009 } 2010 2011 if (tb[IFLA_BROADCAST]) { 2012 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2013 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2014 } 2015 2016 if (ifm->ifi_flags || ifm->ifi_change) { 2017 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2018 if (err < 0) 2019 goto errout; 2020 } 2021 2022 if (tb[IFLA_MASTER]) { 2023 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2024 if (err) 2025 goto errout; 2026 status |= DO_SETLINK_MODIFIED; 2027 } 2028 2029 if (tb[IFLA_CARRIER]) { 2030 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2031 if (err) 2032 goto errout; 2033 status |= DO_SETLINK_MODIFIED; 2034 } 2035 2036 if (tb[IFLA_TXQLEN]) { 2037 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 2038 unsigned long orig_len = dev->tx_queue_len; 2039 2040 if (dev->tx_queue_len ^ value) { 2041 dev->tx_queue_len = value; 2042 err = call_netdevice_notifiers( 2043 NETDEV_CHANGE_TX_QUEUE_LEN, dev); 2044 err = notifier_to_errno(err); 2045 if (err) { 2046 dev->tx_queue_len = orig_len; 2047 goto errout; 2048 } 2049 status |= DO_SETLINK_NOTIFY; 2050 } 2051 } 2052 2053 if (tb[IFLA_OPERSTATE]) 2054 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2055 2056 if (tb[IFLA_LINKMODE]) { 2057 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2058 2059 write_lock_bh(&dev_base_lock); 2060 if (dev->link_mode ^ value) 2061 status |= DO_SETLINK_NOTIFY; 2062 dev->link_mode = value; 2063 write_unlock_bh(&dev_base_lock); 2064 } 2065 2066 if (tb[IFLA_VFINFO_LIST]) { 2067 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2068 struct nlattr *attr; 2069 int rem; 2070 2071 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2072 if (nla_type(attr) != IFLA_VF_INFO || 2073 nla_len(attr) < NLA_HDRLEN) { 2074 err = -EINVAL; 2075 goto errout; 2076 } 2077 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 2078 ifla_vf_policy); 2079 if (err < 0) 2080 goto errout; 2081 err = do_setvfinfo(dev, vfinfo); 2082 if (err < 0) 2083 goto errout; 2084 status |= DO_SETLINK_NOTIFY; 2085 } 2086 } 2087 err = 0; 2088 2089 if (tb[IFLA_VF_PORTS]) { 2090 struct nlattr *port[IFLA_PORT_MAX+1]; 2091 struct nlattr *attr; 2092 int vf; 2093 int rem; 2094 2095 err = -EOPNOTSUPP; 2096 if (!ops->ndo_set_vf_port) 2097 goto errout; 2098 2099 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2100 if (nla_type(attr) != IFLA_VF_PORT || 2101 nla_len(attr) < NLA_HDRLEN) { 2102 err = -EINVAL; 2103 goto errout; 2104 } 2105 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 2106 ifla_port_policy); 2107 if (err < 0) 2108 goto errout; 2109 if (!port[IFLA_PORT_VF]) { 2110 err = -EOPNOTSUPP; 2111 goto errout; 2112 } 2113 vf = nla_get_u32(port[IFLA_PORT_VF]); 2114 err = ops->ndo_set_vf_port(dev, vf, port); 2115 if (err < 0) 2116 goto errout; 2117 status |= DO_SETLINK_NOTIFY; 2118 } 2119 } 2120 err = 0; 2121 2122 if (tb[IFLA_PORT_SELF]) { 2123 struct nlattr *port[IFLA_PORT_MAX+1]; 2124 2125 err = nla_parse_nested(port, IFLA_PORT_MAX, 2126 tb[IFLA_PORT_SELF], ifla_port_policy); 2127 if (err < 0) 2128 goto errout; 2129 2130 err = -EOPNOTSUPP; 2131 if (ops->ndo_set_vf_port) 2132 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2133 if (err < 0) 2134 goto errout; 2135 status |= DO_SETLINK_NOTIFY; 2136 } 2137 2138 if (tb[IFLA_AF_SPEC]) { 2139 struct nlattr *af; 2140 int rem; 2141 2142 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2143 const struct rtnl_af_ops *af_ops; 2144 2145 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2146 BUG(); 2147 2148 err = af_ops->set_link_af(dev, af); 2149 if (err < 0) 2150 goto errout; 2151 2152 status |= DO_SETLINK_NOTIFY; 2153 } 2154 } 2155 err = 0; 2156 2157 if (tb[IFLA_PROTO_DOWN]) { 2158 err = dev_change_proto_down(dev, 2159 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2160 if (err) 2161 goto errout; 2162 status |= DO_SETLINK_NOTIFY; 2163 } 2164 2165 if (tb[IFLA_XDP]) { 2166 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2167 u32 xdp_flags = 0; 2168 2169 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2170 ifla_xdp_policy); 2171 if (err < 0) 2172 goto errout; 2173 2174 if (xdp[IFLA_XDP_ATTACHED]) { 2175 err = -EINVAL; 2176 goto errout; 2177 } 2178 2179 if (xdp[IFLA_XDP_FLAGS]) { 2180 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2181 if (xdp_flags & ~XDP_FLAGS_MASK) { 2182 err = -EINVAL; 2183 goto errout; 2184 } 2185 } 2186 2187 if (xdp[IFLA_XDP_FD]) { 2188 err = dev_change_xdp_fd(dev, 2189 nla_get_s32(xdp[IFLA_XDP_FD]), 2190 xdp_flags); 2191 if (err) 2192 goto errout; 2193 status |= DO_SETLINK_NOTIFY; 2194 } 2195 } 2196 2197 errout: 2198 if (status & DO_SETLINK_MODIFIED) { 2199 if (status & DO_SETLINK_NOTIFY) 2200 netdev_state_change(dev); 2201 2202 if (err < 0) 2203 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", 2204 dev->name); 2205 } 2206 2207 return err; 2208 } 2209 2210 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2211 { 2212 struct net *net = sock_net(skb->sk); 2213 struct ifinfomsg *ifm; 2214 struct net_device *dev; 2215 int err; 2216 struct nlattr *tb[IFLA_MAX+1]; 2217 char ifname[IFNAMSIZ]; 2218 2219 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2220 if (err < 0) 2221 goto errout; 2222 2223 if (tb[IFLA_IFNAME]) 2224 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2225 else 2226 ifname[0] = '\0'; 2227 2228 err = -EINVAL; 2229 ifm = nlmsg_data(nlh); 2230 if (ifm->ifi_index > 0) 2231 dev = __dev_get_by_index(net, ifm->ifi_index); 2232 else if (tb[IFLA_IFNAME]) 2233 dev = __dev_get_by_name(net, ifname); 2234 else 2235 goto errout; 2236 2237 if (dev == NULL) { 2238 err = -ENODEV; 2239 goto errout; 2240 } 2241 2242 err = validate_linkmsg(dev, tb); 2243 if (err < 0) 2244 goto errout; 2245 2246 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 2247 errout: 2248 return err; 2249 } 2250 2251 static int rtnl_group_dellink(const struct net *net, int group) 2252 { 2253 struct net_device *dev, *aux; 2254 LIST_HEAD(list_kill); 2255 bool found = false; 2256 2257 if (!group) 2258 return -EPERM; 2259 2260 for_each_netdev(net, dev) { 2261 if (dev->group == group) { 2262 const struct rtnl_link_ops *ops; 2263 2264 found = true; 2265 ops = dev->rtnl_link_ops; 2266 if (!ops || !ops->dellink) 2267 return -EOPNOTSUPP; 2268 } 2269 } 2270 2271 if (!found) 2272 return -ENODEV; 2273 2274 for_each_netdev_safe(net, dev, aux) { 2275 if (dev->group == group) { 2276 const struct rtnl_link_ops *ops; 2277 2278 ops = dev->rtnl_link_ops; 2279 ops->dellink(dev, &list_kill); 2280 } 2281 } 2282 unregister_netdevice_many(&list_kill); 2283 2284 return 0; 2285 } 2286 2287 int rtnl_delete_link(struct net_device *dev) 2288 { 2289 const struct rtnl_link_ops *ops; 2290 LIST_HEAD(list_kill); 2291 2292 ops = dev->rtnl_link_ops; 2293 if (!ops || !ops->dellink) 2294 return -EOPNOTSUPP; 2295 2296 ops->dellink(dev, &list_kill); 2297 unregister_netdevice_many(&list_kill); 2298 2299 return 0; 2300 } 2301 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2302 2303 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2304 { 2305 struct net *net = sock_net(skb->sk); 2306 struct net_device *dev; 2307 struct ifinfomsg *ifm; 2308 char ifname[IFNAMSIZ]; 2309 struct nlattr *tb[IFLA_MAX+1]; 2310 int err; 2311 2312 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2313 if (err < 0) 2314 return err; 2315 2316 if (tb[IFLA_IFNAME]) 2317 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2318 2319 ifm = nlmsg_data(nlh); 2320 if (ifm->ifi_index > 0) 2321 dev = __dev_get_by_index(net, ifm->ifi_index); 2322 else if (tb[IFLA_IFNAME]) 2323 dev = __dev_get_by_name(net, ifname); 2324 else if (tb[IFLA_GROUP]) 2325 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2326 else 2327 return -EINVAL; 2328 2329 if (!dev) 2330 return -ENODEV; 2331 2332 return rtnl_delete_link(dev); 2333 } 2334 2335 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2336 { 2337 unsigned int old_flags; 2338 int err; 2339 2340 old_flags = dev->flags; 2341 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2342 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2343 if (err < 0) 2344 return err; 2345 } 2346 2347 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2348 2349 __dev_notify_flags(dev, old_flags, ~0U); 2350 return 0; 2351 } 2352 EXPORT_SYMBOL(rtnl_configure_link); 2353 2354 struct net_device *rtnl_create_link(struct net *net, 2355 const char *ifname, unsigned char name_assign_type, 2356 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2357 { 2358 int err; 2359 struct net_device *dev; 2360 unsigned int num_tx_queues = 1; 2361 unsigned int num_rx_queues = 1; 2362 2363 if (tb[IFLA_NUM_TX_QUEUES]) 2364 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2365 else if (ops->get_num_tx_queues) 2366 num_tx_queues = ops->get_num_tx_queues(); 2367 2368 if (tb[IFLA_NUM_RX_QUEUES]) 2369 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2370 else if (ops->get_num_rx_queues) 2371 num_rx_queues = ops->get_num_rx_queues(); 2372 2373 err = -ENOMEM; 2374 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2375 ops->setup, num_tx_queues, num_rx_queues); 2376 if (!dev) 2377 goto err; 2378 2379 dev_net_set(dev, net); 2380 dev->rtnl_link_ops = ops; 2381 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2382 2383 if (tb[IFLA_MTU]) 2384 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2385 if (tb[IFLA_ADDRESS]) { 2386 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2387 nla_len(tb[IFLA_ADDRESS])); 2388 dev->addr_assign_type = NET_ADDR_SET; 2389 } 2390 if (tb[IFLA_BROADCAST]) 2391 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2392 nla_len(tb[IFLA_BROADCAST])); 2393 if (tb[IFLA_TXQLEN]) 2394 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2395 if (tb[IFLA_OPERSTATE]) 2396 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2397 if (tb[IFLA_LINKMODE]) 2398 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2399 if (tb[IFLA_GROUP]) 2400 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2401 2402 return dev; 2403 2404 err: 2405 return ERR_PTR(err); 2406 } 2407 EXPORT_SYMBOL(rtnl_create_link); 2408 2409 static int rtnl_group_changelink(const struct sk_buff *skb, 2410 struct net *net, int group, 2411 struct ifinfomsg *ifm, 2412 struct nlattr **tb) 2413 { 2414 struct net_device *dev, *aux; 2415 int err; 2416 2417 for_each_netdev_safe(net, dev, aux) { 2418 if (dev->group == group) { 2419 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2420 if (err < 0) 2421 return err; 2422 } 2423 } 2424 2425 return 0; 2426 } 2427 2428 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2429 { 2430 struct net *net = sock_net(skb->sk); 2431 const struct rtnl_link_ops *ops; 2432 const struct rtnl_link_ops *m_ops = NULL; 2433 struct net_device *dev; 2434 struct net_device *master_dev = NULL; 2435 struct ifinfomsg *ifm; 2436 char kind[MODULE_NAME_LEN]; 2437 char ifname[IFNAMSIZ]; 2438 struct nlattr *tb[IFLA_MAX+1]; 2439 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2440 unsigned char name_assign_type = NET_NAME_USER; 2441 int err; 2442 2443 #ifdef CONFIG_MODULES 2444 replay: 2445 #endif 2446 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2447 if (err < 0) 2448 return err; 2449 2450 if (tb[IFLA_IFNAME]) 2451 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2452 else 2453 ifname[0] = '\0'; 2454 2455 ifm = nlmsg_data(nlh); 2456 if (ifm->ifi_index > 0) 2457 dev = __dev_get_by_index(net, ifm->ifi_index); 2458 else { 2459 if (ifname[0]) 2460 dev = __dev_get_by_name(net, ifname); 2461 else 2462 dev = NULL; 2463 } 2464 2465 if (dev) { 2466 master_dev = netdev_master_upper_dev_get(dev); 2467 if (master_dev) 2468 m_ops = master_dev->rtnl_link_ops; 2469 } 2470 2471 err = validate_linkmsg(dev, tb); 2472 if (err < 0) 2473 return err; 2474 2475 if (tb[IFLA_LINKINFO]) { 2476 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2477 tb[IFLA_LINKINFO], ifla_info_policy); 2478 if (err < 0) 2479 return err; 2480 } else 2481 memset(linkinfo, 0, sizeof(linkinfo)); 2482 2483 if (linkinfo[IFLA_INFO_KIND]) { 2484 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2485 ops = rtnl_link_ops_get(kind); 2486 } else { 2487 kind[0] = '\0'; 2488 ops = NULL; 2489 } 2490 2491 if (1) { 2492 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2493 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2494 struct nlattr **data = NULL; 2495 struct nlattr **slave_data = NULL; 2496 struct net *dest_net, *link_net = NULL; 2497 2498 if (ops) { 2499 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2500 err = nla_parse_nested(attr, ops->maxtype, 2501 linkinfo[IFLA_INFO_DATA], 2502 ops->policy); 2503 if (err < 0) 2504 return err; 2505 data = attr; 2506 } 2507 if (ops->validate) { 2508 err = ops->validate(tb, data); 2509 if (err < 0) 2510 return err; 2511 } 2512 } 2513 2514 if (m_ops) { 2515 if (m_ops->slave_maxtype && 2516 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2517 err = nla_parse_nested(slave_attr, 2518 m_ops->slave_maxtype, 2519 linkinfo[IFLA_INFO_SLAVE_DATA], 2520 m_ops->slave_policy); 2521 if (err < 0) 2522 return err; 2523 slave_data = slave_attr; 2524 } 2525 if (m_ops->slave_validate) { 2526 err = m_ops->slave_validate(tb, slave_data); 2527 if (err < 0) 2528 return err; 2529 } 2530 } 2531 2532 if (dev) { 2533 int status = 0; 2534 2535 if (nlh->nlmsg_flags & NLM_F_EXCL) 2536 return -EEXIST; 2537 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2538 return -EOPNOTSUPP; 2539 2540 if (linkinfo[IFLA_INFO_DATA]) { 2541 if (!ops || ops != dev->rtnl_link_ops || 2542 !ops->changelink) 2543 return -EOPNOTSUPP; 2544 2545 err = ops->changelink(dev, tb, data); 2546 if (err < 0) 2547 return err; 2548 status |= DO_SETLINK_NOTIFY; 2549 } 2550 2551 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2552 if (!m_ops || !m_ops->slave_changelink) 2553 return -EOPNOTSUPP; 2554 2555 err = m_ops->slave_changelink(master_dev, dev, 2556 tb, slave_data); 2557 if (err < 0) 2558 return err; 2559 status |= DO_SETLINK_NOTIFY; 2560 } 2561 2562 return do_setlink(skb, dev, ifm, tb, ifname, status); 2563 } 2564 2565 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2566 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2567 return rtnl_group_changelink(skb, net, 2568 nla_get_u32(tb[IFLA_GROUP]), 2569 ifm, tb); 2570 return -ENODEV; 2571 } 2572 2573 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 2574 return -EOPNOTSUPP; 2575 2576 if (!ops) { 2577 #ifdef CONFIG_MODULES 2578 if (kind[0]) { 2579 __rtnl_unlock(); 2580 request_module("rtnl-link-%s", kind); 2581 rtnl_lock(); 2582 ops = rtnl_link_ops_get(kind); 2583 if (ops) 2584 goto replay; 2585 } 2586 #endif 2587 return -EOPNOTSUPP; 2588 } 2589 2590 if (!ops->setup) 2591 return -EOPNOTSUPP; 2592 2593 if (!ifname[0]) { 2594 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2595 name_assign_type = NET_NAME_ENUM; 2596 } 2597 2598 dest_net = rtnl_link_get_net(net, tb); 2599 if (IS_ERR(dest_net)) 2600 return PTR_ERR(dest_net); 2601 2602 err = -EPERM; 2603 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2604 goto out; 2605 2606 if (tb[IFLA_LINK_NETNSID]) { 2607 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2608 2609 link_net = get_net_ns_by_id(dest_net, id); 2610 if (!link_net) { 2611 err = -EINVAL; 2612 goto out; 2613 } 2614 err = -EPERM; 2615 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2616 goto out; 2617 } 2618 2619 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2620 name_assign_type, ops, tb); 2621 if (IS_ERR(dev)) { 2622 err = PTR_ERR(dev); 2623 goto out; 2624 } 2625 2626 dev->ifindex = ifm->ifi_index; 2627 2628 if (ops->newlink) { 2629 err = ops->newlink(link_net ? : net, dev, tb, data); 2630 /* Drivers should call free_netdev() in ->destructor 2631 * and unregister it on failure after registration 2632 * so that device could be finally freed in rtnl_unlock. 2633 */ 2634 if (err < 0) { 2635 /* If device is not registered at all, free it now */ 2636 if (dev->reg_state == NETREG_UNINITIALIZED) 2637 free_netdev(dev); 2638 goto out; 2639 } 2640 } else { 2641 err = register_netdevice(dev); 2642 if (err < 0) { 2643 free_netdev(dev); 2644 goto out; 2645 } 2646 } 2647 err = rtnl_configure_link(dev, ifm); 2648 if (err < 0) 2649 goto out_unregister; 2650 if (link_net) { 2651 err = dev_change_net_namespace(dev, dest_net, ifname); 2652 if (err < 0) 2653 goto out_unregister; 2654 } 2655 if (tb[IFLA_MASTER]) { 2656 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2657 if (err) 2658 goto out_unregister; 2659 } 2660 out: 2661 if (link_net) 2662 put_net(link_net); 2663 put_net(dest_net); 2664 return err; 2665 out_unregister: 2666 if (ops->newlink) { 2667 LIST_HEAD(list_kill); 2668 2669 ops->dellink(dev, &list_kill); 2670 unregister_netdevice_many(&list_kill); 2671 } else { 2672 unregister_netdevice(dev); 2673 } 2674 goto out; 2675 } 2676 } 2677 2678 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2679 { 2680 struct net *net = sock_net(skb->sk); 2681 struct ifinfomsg *ifm; 2682 char ifname[IFNAMSIZ]; 2683 struct nlattr *tb[IFLA_MAX+1]; 2684 struct net_device *dev = NULL; 2685 struct sk_buff *nskb; 2686 int err; 2687 u32 ext_filter_mask = 0; 2688 2689 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2690 if (err < 0) 2691 return err; 2692 2693 if (tb[IFLA_IFNAME]) 2694 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2695 2696 if (tb[IFLA_EXT_MASK]) 2697 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2698 2699 ifm = nlmsg_data(nlh); 2700 if (ifm->ifi_index > 0) 2701 dev = __dev_get_by_index(net, ifm->ifi_index); 2702 else if (tb[IFLA_IFNAME]) 2703 dev = __dev_get_by_name(net, ifname); 2704 else 2705 return -EINVAL; 2706 2707 if (dev == NULL) 2708 return -ENODEV; 2709 2710 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2711 if (nskb == NULL) 2712 return -ENOBUFS; 2713 2714 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2715 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2716 if (err < 0) { 2717 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2718 WARN_ON(err == -EMSGSIZE); 2719 kfree_skb(nskb); 2720 } else 2721 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2722 2723 return err; 2724 } 2725 2726 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2727 { 2728 struct net *net = sock_net(skb->sk); 2729 struct net_device *dev; 2730 struct nlattr *tb[IFLA_MAX+1]; 2731 u32 ext_filter_mask = 0; 2732 u16 min_ifinfo_dump_size = 0; 2733 int hdrlen; 2734 2735 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2736 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2737 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2738 2739 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2740 if (tb[IFLA_EXT_MASK]) 2741 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2742 } 2743 2744 if (!ext_filter_mask) 2745 return NLMSG_GOODSIZE; 2746 /* 2747 * traverse the list of net devices and compute the minimum 2748 * buffer size based upon the filter mask. 2749 */ 2750 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2751 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2752 if_nlmsg_size(dev, 2753 ext_filter_mask)); 2754 } 2755 2756 return nlmsg_total_size(min_ifinfo_dump_size); 2757 } 2758 2759 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2760 { 2761 int idx; 2762 int s_idx = cb->family; 2763 2764 if (s_idx == 0) 2765 s_idx = 1; 2766 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2767 int type = cb->nlh->nlmsg_type-RTM_BASE; 2768 if (idx < s_idx || idx == PF_PACKET) 2769 continue; 2770 if (rtnl_msg_handlers[idx] == NULL || 2771 rtnl_msg_handlers[idx][type].dumpit == NULL) 2772 continue; 2773 if (idx > s_idx) { 2774 memset(&cb->args[0], 0, sizeof(cb->args)); 2775 cb->prev_seq = 0; 2776 cb->seq = 0; 2777 } 2778 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2779 break; 2780 } 2781 cb->family = idx; 2782 2783 return skb->len; 2784 } 2785 2786 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2787 unsigned int change, gfp_t flags) 2788 { 2789 struct net *net = dev_net(dev); 2790 struct sk_buff *skb; 2791 int err = -ENOBUFS; 2792 size_t if_info_size; 2793 2794 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2795 if (skb == NULL) 2796 goto errout; 2797 2798 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2799 if (err < 0) { 2800 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2801 WARN_ON(err == -EMSGSIZE); 2802 kfree_skb(skb); 2803 goto errout; 2804 } 2805 return skb; 2806 errout: 2807 if (err < 0) 2808 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2809 return NULL; 2810 } 2811 2812 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2813 { 2814 struct net *net = dev_net(dev); 2815 2816 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2817 } 2818 2819 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2820 gfp_t flags) 2821 { 2822 struct sk_buff *skb; 2823 2824 if (dev->reg_state != NETREG_REGISTERED) 2825 return; 2826 2827 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2828 if (skb) 2829 rtmsg_ifinfo_send(skb, dev, flags); 2830 } 2831 EXPORT_SYMBOL(rtmsg_ifinfo); 2832 2833 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2834 struct net_device *dev, 2835 u8 *addr, u16 vid, u32 pid, u32 seq, 2836 int type, unsigned int flags, 2837 int nlflags, u16 ndm_state) 2838 { 2839 struct nlmsghdr *nlh; 2840 struct ndmsg *ndm; 2841 2842 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2843 if (!nlh) 2844 return -EMSGSIZE; 2845 2846 ndm = nlmsg_data(nlh); 2847 ndm->ndm_family = AF_BRIDGE; 2848 ndm->ndm_pad1 = 0; 2849 ndm->ndm_pad2 = 0; 2850 ndm->ndm_flags = flags; 2851 ndm->ndm_type = 0; 2852 ndm->ndm_ifindex = dev->ifindex; 2853 ndm->ndm_state = ndm_state; 2854 2855 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2856 goto nla_put_failure; 2857 if (vid) 2858 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2859 goto nla_put_failure; 2860 2861 nlmsg_end(skb, nlh); 2862 return 0; 2863 2864 nla_put_failure: 2865 nlmsg_cancel(skb, nlh); 2866 return -EMSGSIZE; 2867 } 2868 2869 static inline size_t rtnl_fdb_nlmsg_size(void) 2870 { 2871 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 2872 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 2873 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 2874 0; 2875 } 2876 2877 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2878 u16 ndm_state) 2879 { 2880 struct net *net = dev_net(dev); 2881 struct sk_buff *skb; 2882 int err = -ENOBUFS; 2883 2884 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2885 if (!skb) 2886 goto errout; 2887 2888 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2889 0, 0, type, NTF_SELF, 0, ndm_state); 2890 if (err < 0) { 2891 kfree_skb(skb); 2892 goto errout; 2893 } 2894 2895 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2896 return; 2897 errout: 2898 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2899 } 2900 2901 /** 2902 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2903 */ 2904 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2905 struct nlattr *tb[], 2906 struct net_device *dev, 2907 const unsigned char *addr, u16 vid, 2908 u16 flags) 2909 { 2910 int err = -EINVAL; 2911 2912 /* If aging addresses are supported device will need to 2913 * implement its own handler for this. 2914 */ 2915 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2916 pr_info("%s: FDB only supports static addresses\n", dev->name); 2917 return err; 2918 } 2919 2920 if (vid) { 2921 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2922 return err; 2923 } 2924 2925 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2926 err = dev_uc_add_excl(dev, addr); 2927 else if (is_multicast_ether_addr(addr)) 2928 err = dev_mc_add_excl(dev, addr); 2929 2930 /* Only return duplicate errors if NLM_F_EXCL is set */ 2931 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2932 err = 0; 2933 2934 return err; 2935 } 2936 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2937 2938 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2939 { 2940 u16 vid = 0; 2941 2942 if (vlan_attr) { 2943 if (nla_len(vlan_attr) != sizeof(u16)) { 2944 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2945 return -EINVAL; 2946 } 2947 2948 vid = nla_get_u16(vlan_attr); 2949 2950 if (!vid || vid >= VLAN_VID_MASK) { 2951 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2952 vid); 2953 return -EINVAL; 2954 } 2955 } 2956 *p_vid = vid; 2957 return 0; 2958 } 2959 2960 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2961 { 2962 struct net *net = sock_net(skb->sk); 2963 struct ndmsg *ndm; 2964 struct nlattr *tb[NDA_MAX+1]; 2965 struct net_device *dev; 2966 u8 *addr; 2967 u16 vid; 2968 int err; 2969 2970 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2971 if (err < 0) 2972 return err; 2973 2974 ndm = nlmsg_data(nlh); 2975 if (ndm->ndm_ifindex == 0) { 2976 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2977 return -EINVAL; 2978 } 2979 2980 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2981 if (dev == NULL) { 2982 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2983 return -ENODEV; 2984 } 2985 2986 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2987 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2988 return -EINVAL; 2989 } 2990 2991 addr = nla_data(tb[NDA_LLADDR]); 2992 2993 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2994 if (err) 2995 return err; 2996 2997 err = -EOPNOTSUPP; 2998 2999 /* Support fdb on master device the net/bridge default case */ 3000 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3001 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3002 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3003 const struct net_device_ops *ops = br_dev->netdev_ops; 3004 3005 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 3006 nlh->nlmsg_flags); 3007 if (err) 3008 goto out; 3009 else 3010 ndm->ndm_flags &= ~NTF_MASTER; 3011 } 3012 3013 /* Embedded bridge, macvlan, and any other device support */ 3014 if ((ndm->ndm_flags & NTF_SELF)) { 3015 if (dev->netdev_ops->ndo_fdb_add) 3016 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 3017 vid, 3018 nlh->nlmsg_flags); 3019 else 3020 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 3021 nlh->nlmsg_flags); 3022 3023 if (!err) { 3024 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3025 ndm->ndm_state); 3026 ndm->ndm_flags &= ~NTF_SELF; 3027 } 3028 } 3029 out: 3030 return err; 3031 } 3032 3033 /** 3034 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3035 */ 3036 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3037 struct nlattr *tb[], 3038 struct net_device *dev, 3039 const unsigned char *addr, u16 vid) 3040 { 3041 int err = -EINVAL; 3042 3043 /* If aging addresses are supported device will need to 3044 * implement its own handler for this. 3045 */ 3046 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3047 pr_info("%s: FDB only supports static addresses\n", dev->name); 3048 return err; 3049 } 3050 3051 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3052 err = dev_uc_del(dev, addr); 3053 else if (is_multicast_ether_addr(addr)) 3054 err = dev_mc_del(dev, addr); 3055 3056 return err; 3057 } 3058 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3059 3060 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 3061 { 3062 struct net *net = sock_net(skb->sk); 3063 struct ndmsg *ndm; 3064 struct nlattr *tb[NDA_MAX+1]; 3065 struct net_device *dev; 3066 int err = -EINVAL; 3067 __u8 *addr; 3068 u16 vid; 3069 3070 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3071 return -EPERM; 3072 3073 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 3074 if (err < 0) 3075 return err; 3076 3077 ndm = nlmsg_data(nlh); 3078 if (ndm->ndm_ifindex == 0) { 3079 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 3080 return -EINVAL; 3081 } 3082 3083 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3084 if (dev == NULL) { 3085 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 3086 return -ENODEV; 3087 } 3088 3089 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3090 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 3091 return -EINVAL; 3092 } 3093 3094 addr = nla_data(tb[NDA_LLADDR]); 3095 3096 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 3097 if (err) 3098 return err; 3099 3100 err = -EOPNOTSUPP; 3101 3102 /* Support fdb on master device the net/bridge default case */ 3103 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3104 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3105 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3106 const struct net_device_ops *ops = br_dev->netdev_ops; 3107 3108 if (ops->ndo_fdb_del) 3109 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3110 3111 if (err) 3112 goto out; 3113 else 3114 ndm->ndm_flags &= ~NTF_MASTER; 3115 } 3116 3117 /* Embedded bridge, macvlan, and any other device support */ 3118 if (ndm->ndm_flags & NTF_SELF) { 3119 if (dev->netdev_ops->ndo_fdb_del) 3120 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3121 vid); 3122 else 3123 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3124 3125 if (!err) { 3126 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3127 ndm->ndm_state); 3128 ndm->ndm_flags &= ~NTF_SELF; 3129 } 3130 } 3131 out: 3132 return err; 3133 } 3134 3135 static int nlmsg_populate_fdb(struct sk_buff *skb, 3136 struct netlink_callback *cb, 3137 struct net_device *dev, 3138 int *idx, 3139 struct netdev_hw_addr_list *list) 3140 { 3141 struct netdev_hw_addr *ha; 3142 int err; 3143 u32 portid, seq; 3144 3145 portid = NETLINK_CB(cb->skb).portid; 3146 seq = cb->nlh->nlmsg_seq; 3147 3148 list_for_each_entry(ha, &list->list, list) { 3149 if (*idx < cb->args[2]) 3150 goto skip; 3151 3152 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3153 portid, seq, 3154 RTM_NEWNEIGH, NTF_SELF, 3155 NLM_F_MULTI, NUD_PERMANENT); 3156 if (err < 0) 3157 return err; 3158 skip: 3159 *idx += 1; 3160 } 3161 return 0; 3162 } 3163 3164 /** 3165 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3166 * @nlh: netlink message header 3167 * @dev: netdevice 3168 * 3169 * Default netdevice operation to dump the existing unicast address list. 3170 * Returns number of addresses from list put in skb. 3171 */ 3172 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3173 struct netlink_callback *cb, 3174 struct net_device *dev, 3175 struct net_device *filter_dev, 3176 int *idx) 3177 { 3178 int err; 3179 3180 netif_addr_lock_bh(dev); 3181 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3182 if (err) 3183 goto out; 3184 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3185 out: 3186 netif_addr_unlock_bh(dev); 3187 return err; 3188 } 3189 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3190 3191 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3192 { 3193 struct net_device *dev; 3194 struct nlattr *tb[IFLA_MAX+1]; 3195 struct net_device *br_dev = NULL; 3196 const struct net_device_ops *ops = NULL; 3197 const struct net_device_ops *cops = NULL; 3198 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3199 struct net *net = sock_net(skb->sk); 3200 struct hlist_head *head; 3201 int brport_idx = 0; 3202 int br_idx = 0; 3203 int h, s_h; 3204 int idx = 0, s_idx; 3205 int err = 0; 3206 int fidx = 0; 3207 3208 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 3209 ifla_policy) == 0) { 3210 if (tb[IFLA_MASTER]) 3211 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3212 } 3213 3214 brport_idx = ifm->ifi_index; 3215 3216 if (br_idx) { 3217 br_dev = __dev_get_by_index(net, br_idx); 3218 if (!br_dev) 3219 return -ENODEV; 3220 3221 ops = br_dev->netdev_ops; 3222 } 3223 3224 s_h = cb->args[0]; 3225 s_idx = cb->args[1]; 3226 3227 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3228 idx = 0; 3229 head = &net->dev_index_head[h]; 3230 hlist_for_each_entry(dev, head, index_hlist) { 3231 3232 if (brport_idx && (dev->ifindex != brport_idx)) 3233 continue; 3234 3235 if (!br_idx) { /* user did not specify a specific bridge */ 3236 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3237 br_dev = netdev_master_upper_dev_get(dev); 3238 cops = br_dev->netdev_ops; 3239 } 3240 } else { 3241 if (dev != br_dev && 3242 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3243 continue; 3244 3245 if (br_dev != netdev_master_upper_dev_get(dev) && 3246 !(dev->priv_flags & IFF_EBRIDGE)) 3247 continue; 3248 cops = ops; 3249 } 3250 3251 if (idx < s_idx) 3252 goto cont; 3253 3254 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3255 if (cops && cops->ndo_fdb_dump) { 3256 err = cops->ndo_fdb_dump(skb, cb, 3257 br_dev, dev, 3258 &fidx); 3259 if (err == -EMSGSIZE) 3260 goto out; 3261 } 3262 } 3263 3264 if (dev->netdev_ops->ndo_fdb_dump) 3265 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3266 dev, NULL, 3267 &fidx); 3268 else 3269 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3270 &fidx); 3271 if (err == -EMSGSIZE) 3272 goto out; 3273 3274 cops = NULL; 3275 3276 /* reset fdb offset to 0 for rest of the interfaces */ 3277 cb->args[2] = 0; 3278 fidx = 0; 3279 cont: 3280 idx++; 3281 } 3282 } 3283 3284 out: 3285 cb->args[0] = h; 3286 cb->args[1] = idx; 3287 cb->args[2] = fidx; 3288 3289 return skb->len; 3290 } 3291 3292 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3293 unsigned int attrnum, unsigned int flag) 3294 { 3295 if (mask & flag) 3296 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3297 return 0; 3298 } 3299 3300 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3301 struct net_device *dev, u16 mode, 3302 u32 flags, u32 mask, int nlflags, 3303 u32 filter_mask, 3304 int (*vlan_fill)(struct sk_buff *skb, 3305 struct net_device *dev, 3306 u32 filter_mask)) 3307 { 3308 struct nlmsghdr *nlh; 3309 struct ifinfomsg *ifm; 3310 struct nlattr *br_afspec; 3311 struct nlattr *protinfo; 3312 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3313 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3314 int err = 0; 3315 3316 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3317 if (nlh == NULL) 3318 return -EMSGSIZE; 3319 3320 ifm = nlmsg_data(nlh); 3321 ifm->ifi_family = AF_BRIDGE; 3322 ifm->__ifi_pad = 0; 3323 ifm->ifi_type = dev->type; 3324 ifm->ifi_index = dev->ifindex; 3325 ifm->ifi_flags = dev_get_flags(dev); 3326 ifm->ifi_change = 0; 3327 3328 3329 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3330 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3331 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3332 (br_dev && 3333 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3334 (dev->addr_len && 3335 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3336 (dev->ifindex != dev_get_iflink(dev) && 3337 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3338 goto nla_put_failure; 3339 3340 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3341 if (!br_afspec) 3342 goto nla_put_failure; 3343 3344 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3345 nla_nest_cancel(skb, br_afspec); 3346 goto nla_put_failure; 3347 } 3348 3349 if (mode != BRIDGE_MODE_UNDEF) { 3350 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3351 nla_nest_cancel(skb, br_afspec); 3352 goto nla_put_failure; 3353 } 3354 } 3355 if (vlan_fill) { 3356 err = vlan_fill(skb, dev, filter_mask); 3357 if (err) { 3358 nla_nest_cancel(skb, br_afspec); 3359 goto nla_put_failure; 3360 } 3361 } 3362 nla_nest_end(skb, br_afspec); 3363 3364 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3365 if (!protinfo) 3366 goto nla_put_failure; 3367 3368 if (brport_nla_put_flag(skb, flags, mask, 3369 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3370 brport_nla_put_flag(skb, flags, mask, 3371 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3372 brport_nla_put_flag(skb, flags, mask, 3373 IFLA_BRPORT_FAST_LEAVE, 3374 BR_MULTICAST_FAST_LEAVE) || 3375 brport_nla_put_flag(skb, flags, mask, 3376 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3377 brport_nla_put_flag(skb, flags, mask, 3378 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3379 brport_nla_put_flag(skb, flags, mask, 3380 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3381 brport_nla_put_flag(skb, flags, mask, 3382 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3383 brport_nla_put_flag(skb, flags, mask, 3384 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3385 nla_nest_cancel(skb, protinfo); 3386 goto nla_put_failure; 3387 } 3388 3389 nla_nest_end(skb, protinfo); 3390 3391 nlmsg_end(skb, nlh); 3392 return 0; 3393 nla_put_failure: 3394 nlmsg_cancel(skb, nlh); 3395 return err ? err : -EMSGSIZE; 3396 } 3397 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3398 3399 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3400 { 3401 struct net *net = sock_net(skb->sk); 3402 struct net_device *dev; 3403 int idx = 0; 3404 u32 portid = NETLINK_CB(cb->skb).portid; 3405 u32 seq = cb->nlh->nlmsg_seq; 3406 u32 filter_mask = 0; 3407 int err; 3408 3409 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3410 struct nlattr *extfilt; 3411 3412 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3413 IFLA_EXT_MASK); 3414 if (extfilt) { 3415 if (nla_len(extfilt) < sizeof(filter_mask)) 3416 return -EINVAL; 3417 3418 filter_mask = nla_get_u32(extfilt); 3419 } 3420 } 3421 3422 rcu_read_lock(); 3423 for_each_netdev_rcu(net, dev) { 3424 const struct net_device_ops *ops = dev->netdev_ops; 3425 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3426 3427 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3428 if (idx >= cb->args[0]) { 3429 err = br_dev->netdev_ops->ndo_bridge_getlink( 3430 skb, portid, seq, dev, 3431 filter_mask, NLM_F_MULTI); 3432 if (err < 0 && err != -EOPNOTSUPP) 3433 break; 3434 } 3435 idx++; 3436 } 3437 3438 if (ops->ndo_bridge_getlink) { 3439 if (idx >= cb->args[0]) { 3440 err = ops->ndo_bridge_getlink(skb, portid, 3441 seq, dev, 3442 filter_mask, 3443 NLM_F_MULTI); 3444 if (err < 0 && err != -EOPNOTSUPP) 3445 break; 3446 } 3447 idx++; 3448 } 3449 } 3450 rcu_read_unlock(); 3451 cb->args[0] = idx; 3452 3453 return skb->len; 3454 } 3455 3456 static inline size_t bridge_nlmsg_size(void) 3457 { 3458 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3459 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3460 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3461 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3462 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3463 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3464 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3465 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3466 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3467 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3468 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3469 } 3470 3471 static int rtnl_bridge_notify(struct net_device *dev) 3472 { 3473 struct net *net = dev_net(dev); 3474 struct sk_buff *skb; 3475 int err = -EOPNOTSUPP; 3476 3477 if (!dev->netdev_ops->ndo_bridge_getlink) 3478 return 0; 3479 3480 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3481 if (!skb) { 3482 err = -ENOMEM; 3483 goto errout; 3484 } 3485 3486 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3487 if (err < 0) 3488 goto errout; 3489 3490 if (!skb->len) 3491 goto errout; 3492 3493 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3494 return 0; 3495 errout: 3496 WARN_ON(err == -EMSGSIZE); 3497 kfree_skb(skb); 3498 if (err) 3499 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3500 return err; 3501 } 3502 3503 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3504 { 3505 struct net *net = sock_net(skb->sk); 3506 struct ifinfomsg *ifm; 3507 struct net_device *dev; 3508 struct nlattr *br_spec, *attr = NULL; 3509 int rem, err = -EOPNOTSUPP; 3510 u16 flags = 0; 3511 bool have_flags = false; 3512 3513 if (nlmsg_len(nlh) < sizeof(*ifm)) 3514 return -EINVAL; 3515 3516 ifm = nlmsg_data(nlh); 3517 if (ifm->ifi_family != AF_BRIDGE) 3518 return -EPFNOSUPPORT; 3519 3520 dev = __dev_get_by_index(net, ifm->ifi_index); 3521 if (!dev) { 3522 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3523 return -ENODEV; 3524 } 3525 3526 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3527 if (br_spec) { 3528 nla_for_each_nested(attr, br_spec, rem) { 3529 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3530 if (nla_len(attr) < sizeof(flags)) 3531 return -EINVAL; 3532 3533 have_flags = true; 3534 flags = nla_get_u16(attr); 3535 break; 3536 } 3537 } 3538 } 3539 3540 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3541 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3542 3543 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3544 err = -EOPNOTSUPP; 3545 goto out; 3546 } 3547 3548 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3549 if (err) 3550 goto out; 3551 3552 flags &= ~BRIDGE_FLAGS_MASTER; 3553 } 3554 3555 if ((flags & BRIDGE_FLAGS_SELF)) { 3556 if (!dev->netdev_ops->ndo_bridge_setlink) 3557 err = -EOPNOTSUPP; 3558 else 3559 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3560 flags); 3561 if (!err) { 3562 flags &= ~BRIDGE_FLAGS_SELF; 3563 3564 /* Generate event to notify upper layer of bridge 3565 * change 3566 */ 3567 err = rtnl_bridge_notify(dev); 3568 } 3569 } 3570 3571 if (have_flags) 3572 memcpy(nla_data(attr), &flags, sizeof(flags)); 3573 out: 3574 return err; 3575 } 3576 3577 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3578 { 3579 struct net *net = sock_net(skb->sk); 3580 struct ifinfomsg *ifm; 3581 struct net_device *dev; 3582 struct nlattr *br_spec, *attr = NULL; 3583 int rem, err = -EOPNOTSUPP; 3584 u16 flags = 0; 3585 bool have_flags = false; 3586 3587 if (nlmsg_len(nlh) < sizeof(*ifm)) 3588 return -EINVAL; 3589 3590 ifm = nlmsg_data(nlh); 3591 if (ifm->ifi_family != AF_BRIDGE) 3592 return -EPFNOSUPPORT; 3593 3594 dev = __dev_get_by_index(net, ifm->ifi_index); 3595 if (!dev) { 3596 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3597 return -ENODEV; 3598 } 3599 3600 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3601 if (br_spec) { 3602 nla_for_each_nested(attr, br_spec, rem) { 3603 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3604 if (nla_len(attr) < sizeof(flags)) 3605 return -EINVAL; 3606 3607 have_flags = true; 3608 flags = nla_get_u16(attr); 3609 break; 3610 } 3611 } 3612 } 3613 3614 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3615 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3616 3617 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3618 err = -EOPNOTSUPP; 3619 goto out; 3620 } 3621 3622 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3623 if (err) 3624 goto out; 3625 3626 flags &= ~BRIDGE_FLAGS_MASTER; 3627 } 3628 3629 if ((flags & BRIDGE_FLAGS_SELF)) { 3630 if (!dev->netdev_ops->ndo_bridge_dellink) 3631 err = -EOPNOTSUPP; 3632 else 3633 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3634 flags); 3635 3636 if (!err) { 3637 flags &= ~BRIDGE_FLAGS_SELF; 3638 3639 /* Generate event to notify upper layer of bridge 3640 * change 3641 */ 3642 err = rtnl_bridge_notify(dev); 3643 } 3644 } 3645 3646 if (have_flags) 3647 memcpy(nla_data(attr), &flags, sizeof(flags)); 3648 out: 3649 return err; 3650 } 3651 3652 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3653 { 3654 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3655 (!idxattr || idxattr == attrid); 3656 } 3657 3658 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3659 static int rtnl_get_offload_stats_attr_size(int attr_id) 3660 { 3661 switch (attr_id) { 3662 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3663 return sizeof(struct rtnl_link_stats64); 3664 } 3665 3666 return 0; 3667 } 3668 3669 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3670 int *prividx) 3671 { 3672 struct nlattr *attr = NULL; 3673 int attr_id, size; 3674 void *attr_data; 3675 int err; 3676 3677 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3678 dev->netdev_ops->ndo_get_offload_stats)) 3679 return -ENODATA; 3680 3681 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3682 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3683 if (attr_id < *prividx) 3684 continue; 3685 3686 size = rtnl_get_offload_stats_attr_size(attr_id); 3687 if (!size) 3688 continue; 3689 3690 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3691 continue; 3692 3693 attr = nla_reserve_64bit(skb, attr_id, size, 3694 IFLA_OFFLOAD_XSTATS_UNSPEC); 3695 if (!attr) 3696 goto nla_put_failure; 3697 3698 attr_data = nla_data(attr); 3699 memset(attr_data, 0, size); 3700 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3701 attr_data); 3702 if (err) 3703 goto get_offload_stats_failure; 3704 } 3705 3706 if (!attr) 3707 return -ENODATA; 3708 3709 *prividx = 0; 3710 return 0; 3711 3712 nla_put_failure: 3713 err = -EMSGSIZE; 3714 get_offload_stats_failure: 3715 *prividx = attr_id; 3716 return err; 3717 } 3718 3719 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3720 { 3721 int nla_size = 0; 3722 int attr_id; 3723 int size; 3724 3725 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3726 dev->netdev_ops->ndo_get_offload_stats)) 3727 return 0; 3728 3729 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3730 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3731 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3732 continue; 3733 size = rtnl_get_offload_stats_attr_size(attr_id); 3734 nla_size += nla_total_size_64bit(size); 3735 } 3736 3737 if (nla_size != 0) 3738 nla_size += nla_total_size(0); 3739 3740 return nla_size; 3741 } 3742 3743 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3744 int type, u32 pid, u32 seq, u32 change, 3745 unsigned int flags, unsigned int filter_mask, 3746 int *idxattr, int *prividx) 3747 { 3748 struct if_stats_msg *ifsm; 3749 struct nlmsghdr *nlh; 3750 struct nlattr *attr; 3751 int s_prividx = *prividx; 3752 int err; 3753 3754 ASSERT_RTNL(); 3755 3756 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3757 if (!nlh) 3758 return -EMSGSIZE; 3759 3760 ifsm = nlmsg_data(nlh); 3761 ifsm->ifindex = dev->ifindex; 3762 ifsm->filter_mask = filter_mask; 3763 3764 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3765 struct rtnl_link_stats64 *sp; 3766 3767 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3768 sizeof(struct rtnl_link_stats64), 3769 IFLA_STATS_UNSPEC); 3770 if (!attr) 3771 goto nla_put_failure; 3772 3773 sp = nla_data(attr); 3774 dev_get_stats(dev, sp); 3775 } 3776 3777 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3778 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3779 3780 if (ops && ops->fill_linkxstats) { 3781 *idxattr = IFLA_STATS_LINK_XSTATS; 3782 attr = nla_nest_start(skb, 3783 IFLA_STATS_LINK_XSTATS); 3784 if (!attr) 3785 goto nla_put_failure; 3786 3787 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3788 nla_nest_end(skb, attr); 3789 if (err) 3790 goto nla_put_failure; 3791 *idxattr = 0; 3792 } 3793 } 3794 3795 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3796 *idxattr)) { 3797 const struct rtnl_link_ops *ops = NULL; 3798 const struct net_device *master; 3799 3800 master = netdev_master_upper_dev_get(dev); 3801 if (master) 3802 ops = master->rtnl_link_ops; 3803 if (ops && ops->fill_linkxstats) { 3804 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3805 attr = nla_nest_start(skb, 3806 IFLA_STATS_LINK_XSTATS_SLAVE); 3807 if (!attr) 3808 goto nla_put_failure; 3809 3810 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3811 nla_nest_end(skb, attr); 3812 if (err) 3813 goto nla_put_failure; 3814 *idxattr = 0; 3815 } 3816 } 3817 3818 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 3819 *idxattr)) { 3820 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 3821 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 3822 if (!attr) 3823 goto nla_put_failure; 3824 3825 err = rtnl_get_offload_stats(skb, dev, prividx); 3826 if (err == -ENODATA) 3827 nla_nest_cancel(skb, attr); 3828 else 3829 nla_nest_end(skb, attr); 3830 3831 if (err && err != -ENODATA) 3832 goto nla_put_failure; 3833 *idxattr = 0; 3834 } 3835 3836 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 3837 struct rtnl_af_ops *af_ops; 3838 3839 *idxattr = IFLA_STATS_AF_SPEC; 3840 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC); 3841 if (!attr) 3842 goto nla_put_failure; 3843 3844 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3845 if (af_ops->fill_stats_af) { 3846 struct nlattr *af; 3847 int err; 3848 3849 af = nla_nest_start(skb, af_ops->family); 3850 if (!af) 3851 goto nla_put_failure; 3852 3853 err = af_ops->fill_stats_af(skb, dev); 3854 3855 if (err == -ENODATA) 3856 nla_nest_cancel(skb, af); 3857 else if (err < 0) 3858 goto nla_put_failure; 3859 3860 nla_nest_end(skb, af); 3861 } 3862 } 3863 3864 nla_nest_end(skb, attr); 3865 3866 *idxattr = 0; 3867 } 3868 3869 nlmsg_end(skb, nlh); 3870 3871 return 0; 3872 3873 nla_put_failure: 3874 /* not a multi message or no progress mean a real error */ 3875 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 3876 nlmsg_cancel(skb, nlh); 3877 else 3878 nlmsg_end(skb, nlh); 3879 3880 return -EMSGSIZE; 3881 } 3882 3883 static size_t if_nlmsg_stats_size(const struct net_device *dev, 3884 u32 filter_mask) 3885 { 3886 size_t size = 0; 3887 3888 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 3889 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 3890 3891 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 3892 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3893 int attr = IFLA_STATS_LINK_XSTATS; 3894 3895 if (ops && ops->get_linkxstats_size) { 3896 size += nla_total_size(ops->get_linkxstats_size(dev, 3897 attr)); 3898 /* for IFLA_STATS_LINK_XSTATS */ 3899 size += nla_total_size(0); 3900 } 3901 } 3902 3903 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 3904 struct net_device *_dev = (struct net_device *)dev; 3905 const struct rtnl_link_ops *ops = NULL; 3906 const struct net_device *master; 3907 3908 /* netdev_master_upper_dev_get can't take const */ 3909 master = netdev_master_upper_dev_get(_dev); 3910 if (master) 3911 ops = master->rtnl_link_ops; 3912 if (ops && ops->get_linkxstats_size) { 3913 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 3914 3915 size += nla_total_size(ops->get_linkxstats_size(dev, 3916 attr)); 3917 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 3918 size += nla_total_size(0); 3919 } 3920 } 3921 3922 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 3923 size += rtnl_get_offload_stats_size(dev); 3924 3925 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 3926 struct rtnl_af_ops *af_ops; 3927 3928 /* for IFLA_STATS_AF_SPEC */ 3929 size += nla_total_size(0); 3930 3931 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3932 if (af_ops->get_stats_af_size) { 3933 size += nla_total_size( 3934 af_ops->get_stats_af_size(dev)); 3935 3936 /* for AF_* */ 3937 size += nla_total_size(0); 3938 } 3939 } 3940 } 3941 3942 return size; 3943 } 3944 3945 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh) 3946 { 3947 struct net *net = sock_net(skb->sk); 3948 struct net_device *dev = NULL; 3949 int idxattr = 0, prividx = 0; 3950 struct if_stats_msg *ifsm; 3951 struct sk_buff *nskb; 3952 u32 filter_mask; 3953 int err; 3954 3955 if (nlmsg_len(nlh) < sizeof(*ifsm)) 3956 return -EINVAL; 3957 3958 ifsm = nlmsg_data(nlh); 3959 if (ifsm->ifindex > 0) 3960 dev = __dev_get_by_index(net, ifsm->ifindex); 3961 else 3962 return -EINVAL; 3963 3964 if (!dev) 3965 return -ENODEV; 3966 3967 filter_mask = ifsm->filter_mask; 3968 if (!filter_mask) 3969 return -EINVAL; 3970 3971 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 3972 if (!nskb) 3973 return -ENOBUFS; 3974 3975 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 3976 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 3977 0, filter_mask, &idxattr, &prividx); 3978 if (err < 0) { 3979 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 3980 WARN_ON(err == -EMSGSIZE); 3981 kfree_skb(nskb); 3982 } else { 3983 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3984 } 3985 3986 return err; 3987 } 3988 3989 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 3990 { 3991 int h, s_h, err, s_idx, s_idxattr, s_prividx; 3992 struct net *net = sock_net(skb->sk); 3993 unsigned int flags = NLM_F_MULTI; 3994 struct if_stats_msg *ifsm; 3995 struct hlist_head *head; 3996 struct net_device *dev; 3997 u32 filter_mask = 0; 3998 int idx = 0; 3999 4000 s_h = cb->args[0]; 4001 s_idx = cb->args[1]; 4002 s_idxattr = cb->args[2]; 4003 s_prividx = cb->args[3]; 4004 4005 cb->seq = net->dev_base_seq; 4006 4007 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) 4008 return -EINVAL; 4009 4010 ifsm = nlmsg_data(cb->nlh); 4011 filter_mask = ifsm->filter_mask; 4012 if (!filter_mask) 4013 return -EINVAL; 4014 4015 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4016 idx = 0; 4017 head = &net->dev_index_head[h]; 4018 hlist_for_each_entry(dev, head, index_hlist) { 4019 if (idx < s_idx) 4020 goto cont; 4021 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 4022 NETLINK_CB(cb->skb).portid, 4023 cb->nlh->nlmsg_seq, 0, 4024 flags, filter_mask, 4025 &s_idxattr, &s_prividx); 4026 /* If we ran out of room on the first message, 4027 * we're in trouble 4028 */ 4029 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 4030 4031 if (err < 0) 4032 goto out; 4033 s_prividx = 0; 4034 s_idxattr = 0; 4035 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 4036 cont: 4037 idx++; 4038 } 4039 } 4040 out: 4041 cb->args[3] = s_prividx; 4042 cb->args[2] = s_idxattr; 4043 cb->args[1] = idx; 4044 cb->args[0] = h; 4045 4046 return skb->len; 4047 } 4048 4049 /* Process one rtnetlink message. */ 4050 4051 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 4052 { 4053 struct net *net = sock_net(skb->sk); 4054 rtnl_doit_func doit; 4055 int kind; 4056 int family; 4057 int type; 4058 int err; 4059 4060 type = nlh->nlmsg_type; 4061 if (type > RTM_MAX) 4062 return -EOPNOTSUPP; 4063 4064 type -= RTM_BASE; 4065 4066 /* All the messages must have at least 1 byte length */ 4067 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 4068 return 0; 4069 4070 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 4071 kind = type&3; 4072 4073 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 4074 return -EPERM; 4075 4076 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 4077 struct sock *rtnl; 4078 rtnl_dumpit_func dumpit; 4079 rtnl_calcit_func calcit; 4080 u16 min_dump_alloc = 0; 4081 4082 dumpit = rtnl_get_dumpit(family, type); 4083 if (dumpit == NULL) 4084 return -EOPNOTSUPP; 4085 calcit = rtnl_get_calcit(family, type); 4086 if (calcit) 4087 min_dump_alloc = calcit(skb, nlh); 4088 4089 __rtnl_unlock(); 4090 rtnl = net->rtnl; 4091 { 4092 struct netlink_dump_control c = { 4093 .dump = dumpit, 4094 .min_dump_alloc = min_dump_alloc, 4095 }; 4096 err = netlink_dump_start(rtnl, skb, nlh, &c); 4097 } 4098 rtnl_lock(); 4099 return err; 4100 } 4101 4102 doit = rtnl_get_doit(family, type); 4103 if (doit == NULL) 4104 return -EOPNOTSUPP; 4105 4106 return doit(skb, nlh); 4107 } 4108 4109 static void rtnetlink_rcv(struct sk_buff *skb) 4110 { 4111 rtnl_lock(); 4112 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4113 rtnl_unlock(); 4114 } 4115 4116 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4117 { 4118 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4119 4120 switch (event) { 4121 case NETDEV_UP: 4122 case NETDEV_DOWN: 4123 case NETDEV_PRE_UP: 4124 case NETDEV_POST_INIT: 4125 case NETDEV_REGISTER: 4126 case NETDEV_CHANGE: 4127 case NETDEV_PRE_TYPE_CHANGE: 4128 case NETDEV_GOING_DOWN: 4129 case NETDEV_UNREGISTER: 4130 case NETDEV_UNREGISTER_FINAL: 4131 case NETDEV_RELEASE: 4132 case NETDEV_JOIN: 4133 case NETDEV_BONDING_INFO: 4134 break; 4135 default: 4136 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 4137 break; 4138 } 4139 return NOTIFY_DONE; 4140 } 4141 4142 static struct notifier_block rtnetlink_dev_notifier = { 4143 .notifier_call = rtnetlink_event, 4144 }; 4145 4146 4147 static int __net_init rtnetlink_net_init(struct net *net) 4148 { 4149 struct sock *sk; 4150 struct netlink_kernel_cfg cfg = { 4151 .groups = RTNLGRP_MAX, 4152 .input = rtnetlink_rcv, 4153 .cb_mutex = &rtnl_mutex, 4154 .flags = NL_CFG_F_NONROOT_RECV, 4155 }; 4156 4157 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4158 if (!sk) 4159 return -ENOMEM; 4160 net->rtnl = sk; 4161 return 0; 4162 } 4163 4164 static void __net_exit rtnetlink_net_exit(struct net *net) 4165 { 4166 netlink_kernel_release(net->rtnl); 4167 net->rtnl = NULL; 4168 } 4169 4170 static struct pernet_operations rtnetlink_net_ops = { 4171 .init = rtnetlink_net_init, 4172 .exit = rtnetlink_net_exit, 4173 }; 4174 4175 void __init rtnetlink_init(void) 4176 { 4177 if (register_pernet_subsys(&rtnetlink_net_ops)) 4178 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4179 4180 register_netdevice_notifier(&rtnetlink_dev_notifier); 4181 4182 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4183 rtnl_dump_ifinfo, rtnl_calcit); 4184 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 4185 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 4186 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 4187 4188 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 4189 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 4190 4191 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 4192 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 4193 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 4194 4195 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 4196 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 4197 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 4198 4199 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4200 NULL); 4201 } 4202