1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Routing netlink socket interface: protocol independent part. 7 * 8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 * 15 * Fixes: 16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong. 17 */ 18 19 #include <linux/errno.h> 20 #include <linux/module.h> 21 #include <linux/types.h> 22 #include <linux/socket.h> 23 #include <linux/kernel.h> 24 #include <linux/timer.h> 25 #include <linux/string.h> 26 #include <linux/sockios.h> 27 #include <linux/net.h> 28 #include <linux/fcntl.h> 29 #include <linux/mm.h> 30 #include <linux/slab.h> 31 #include <linux/interrupt.h> 32 #include <linux/capability.h> 33 #include <linux/skbuff.h> 34 #include <linux/init.h> 35 #include <linux/security.h> 36 #include <linux/mutex.h> 37 #include <linux/if_addr.h> 38 #include <linux/if_bridge.h> 39 #include <linux/if_vlan.h> 40 #include <linux/pci.h> 41 #include <linux/etherdevice.h> 42 43 #include <asm/uaccess.h> 44 45 #include <linux/inet.h> 46 #include <linux/netdevice.h> 47 #include <net/switchdev.h> 48 #include <net/ip.h> 49 #include <net/protocol.h> 50 #include <net/arp.h> 51 #include <net/route.h> 52 #include <net/udp.h> 53 #include <net/tcp.h> 54 #include <net/sock.h> 55 #include <net/pkt_sched.h> 56 #include <net/fib_rules.h> 57 #include <net/rtnetlink.h> 58 #include <net/net_namespace.h> 59 60 struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 rtnl_calcit_func calcit; 64 }; 65 66 static DEFINE_MUTEX(rtnl_mutex); 67 68 void rtnl_lock(void) 69 { 70 mutex_lock(&rtnl_mutex); 71 } 72 EXPORT_SYMBOL(rtnl_lock); 73 74 static struct sk_buff *defer_kfree_skb_list; 75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) 76 { 77 if (head && tail) { 78 tail->next = defer_kfree_skb_list; 79 defer_kfree_skb_list = head; 80 } 81 } 82 EXPORT_SYMBOL(rtnl_kfree_skbs); 83 84 void __rtnl_unlock(void) 85 { 86 struct sk_buff *head = defer_kfree_skb_list; 87 88 defer_kfree_skb_list = NULL; 89 90 mutex_unlock(&rtnl_mutex); 91 92 while (head) { 93 struct sk_buff *next = head->next; 94 95 kfree_skb(head); 96 cond_resched(); 97 head = next; 98 } 99 } 100 101 void rtnl_unlock(void) 102 { 103 /* This fellow will unlock it for us. */ 104 netdev_run_todo(); 105 } 106 EXPORT_SYMBOL(rtnl_unlock); 107 108 int rtnl_trylock(void) 109 { 110 return mutex_trylock(&rtnl_mutex); 111 } 112 EXPORT_SYMBOL(rtnl_trylock); 113 114 int rtnl_is_locked(void) 115 { 116 return mutex_is_locked(&rtnl_mutex); 117 } 118 EXPORT_SYMBOL(rtnl_is_locked); 119 120 #ifdef CONFIG_PROVE_LOCKING 121 bool lockdep_rtnl_is_held(void) 122 { 123 return lockdep_is_held(&rtnl_mutex); 124 } 125 EXPORT_SYMBOL(lockdep_rtnl_is_held); 126 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 127 128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 129 130 static inline int rtm_msgindex(int msgtype) 131 { 132 int msgindex = msgtype - RTM_BASE; 133 134 /* 135 * msgindex < 0 implies someone tried to register a netlink 136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 137 * the message type has not been added to linux/rtnetlink.h 138 */ 139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 140 141 return msgindex; 142 } 143 144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 145 { 146 struct rtnl_link *tab; 147 148 if (protocol <= RTNL_FAMILY_MAX) 149 tab = rtnl_msg_handlers[protocol]; 150 else 151 tab = NULL; 152 153 if (tab == NULL || tab[msgindex].doit == NULL) 154 tab = rtnl_msg_handlers[PF_UNSPEC]; 155 156 return tab[msgindex].doit; 157 } 158 159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 160 { 161 struct rtnl_link *tab; 162 163 if (protocol <= RTNL_FAMILY_MAX) 164 tab = rtnl_msg_handlers[protocol]; 165 else 166 tab = NULL; 167 168 if (tab == NULL || tab[msgindex].dumpit == NULL) 169 tab = rtnl_msg_handlers[PF_UNSPEC]; 170 171 return tab[msgindex].dumpit; 172 } 173 174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 175 { 176 struct rtnl_link *tab; 177 178 if (protocol <= RTNL_FAMILY_MAX) 179 tab = rtnl_msg_handlers[protocol]; 180 else 181 tab = NULL; 182 183 if (tab == NULL || tab[msgindex].calcit == NULL) 184 tab = rtnl_msg_handlers[PF_UNSPEC]; 185 186 return tab[msgindex].calcit; 187 } 188 189 /** 190 * __rtnl_register - Register a rtnetlink message type 191 * @protocol: Protocol family or PF_UNSPEC 192 * @msgtype: rtnetlink message type 193 * @doit: Function pointer called for each request message 194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 195 * @calcit: Function pointer to calc size of dump message 196 * 197 * Registers the specified function pointers (at least one of them has 198 * to be non-NULL) to be called whenever a request message for the 199 * specified protocol family and message type is received. 200 * 201 * The special protocol family PF_UNSPEC may be used to define fallback 202 * function pointers for the case when no entry for the specific protocol 203 * family exists. 204 * 205 * Returns 0 on success or a negative error code. 206 */ 207 int __rtnl_register(int protocol, int msgtype, 208 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 209 rtnl_calcit_func calcit) 210 { 211 struct rtnl_link *tab; 212 int msgindex; 213 214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 215 msgindex = rtm_msgindex(msgtype); 216 217 tab = rtnl_msg_handlers[protocol]; 218 if (tab == NULL) { 219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 220 if (tab == NULL) 221 return -ENOBUFS; 222 223 rtnl_msg_handlers[protocol] = tab; 224 } 225 226 if (doit) 227 tab[msgindex].doit = doit; 228 229 if (dumpit) 230 tab[msgindex].dumpit = dumpit; 231 232 if (calcit) 233 tab[msgindex].calcit = calcit; 234 235 return 0; 236 } 237 EXPORT_SYMBOL_GPL(__rtnl_register); 238 239 /** 240 * rtnl_register - Register a rtnetlink message type 241 * 242 * Identical to __rtnl_register() but panics on failure. This is useful 243 * as failure of this function is very unlikely, it can only happen due 244 * to lack of memory when allocating the chain to store all message 245 * handlers for a protocol. Meant for use in init functions where lack 246 * of memory implies no sense in continuing. 247 */ 248 void rtnl_register(int protocol, int msgtype, 249 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 250 rtnl_calcit_func calcit) 251 { 252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 253 panic("Unable to register rtnetlink message handler, " 254 "protocol = %d, message type = %d\n", 255 protocol, msgtype); 256 } 257 EXPORT_SYMBOL_GPL(rtnl_register); 258 259 /** 260 * rtnl_unregister - Unregister a rtnetlink message type 261 * @protocol: Protocol family or PF_UNSPEC 262 * @msgtype: rtnetlink message type 263 * 264 * Returns 0 on success or a negative error code. 265 */ 266 int rtnl_unregister(int protocol, int msgtype) 267 { 268 int msgindex; 269 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 271 msgindex = rtm_msgindex(msgtype); 272 273 if (rtnl_msg_handlers[protocol] == NULL) 274 return -ENOENT; 275 276 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 278 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 && dev_is_pci(dev->dev.parent) && 841 (ext_filter_mask & RTEXT_FILTER_VF)) { 842 int num_vfs = dev_num_vf(dev->dev.parent); 843 size_t size = nla_total_size(0); 844 size += num_vfs * 845 (nla_total_size(0) + 846 nla_total_size(sizeof(struct ifla_vf_mac)) + 847 nla_total_size(sizeof(struct ifla_vf_vlan)) + 848 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ 849 nla_total_size(MAX_VLAN_LIST_LEN * 850 sizeof(struct ifla_vf_vlan_info)) + 851 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 852 nla_total_size(sizeof(struct ifla_vf_tx_rate)) + 853 nla_total_size(sizeof(struct ifla_vf_rate)) + 854 nla_total_size(sizeof(struct ifla_vf_link_state)) + 855 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 856 nla_total_size(0) + /* nest IFLA_VF_STATS */ 857 /* IFLA_VF_STATS_RX_PACKETS */ 858 nla_total_size_64bit(sizeof(__u64)) + 859 /* IFLA_VF_STATS_TX_PACKETS */ 860 nla_total_size_64bit(sizeof(__u64)) + 861 /* IFLA_VF_STATS_RX_BYTES */ 862 nla_total_size_64bit(sizeof(__u64)) + 863 /* IFLA_VF_STATS_TX_BYTES */ 864 nla_total_size_64bit(sizeof(__u64)) + 865 /* IFLA_VF_STATS_BROADCAST */ 866 nla_total_size_64bit(sizeof(__u64)) + 867 /* IFLA_VF_STATS_MULTICAST */ 868 nla_total_size_64bit(sizeof(__u64)) + 869 nla_total_size(sizeof(struct ifla_vf_trust))); 870 return size; 871 } else 872 return 0; 873 } 874 875 static size_t rtnl_port_size(const struct net_device *dev, 876 u32 ext_filter_mask) 877 { 878 size_t port_size = nla_total_size(4) /* PORT_VF */ 879 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 880 + nla_total_size(sizeof(struct ifla_port_vsi)) 881 /* PORT_VSI_TYPE */ 882 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 883 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 884 + nla_total_size(1) /* PROT_VDP_REQUEST */ 885 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 886 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 887 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 888 + port_size; 889 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 890 + port_size; 891 892 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 893 !(ext_filter_mask & RTEXT_FILTER_VF)) 894 return 0; 895 if (dev_num_vf(dev->dev.parent)) 896 return port_self_size + vf_ports_size + 897 vf_port_size * dev_num_vf(dev->dev.parent); 898 else 899 return port_self_size; 900 } 901 902 static size_t rtnl_xdp_size(const struct net_device *dev) 903 { 904 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ 905 nla_total_size(1); /* XDP_ATTACHED */ 906 907 if (!dev->netdev_ops->ndo_xdp) 908 return 0; 909 else 910 return xdp_size; 911 } 912 913 static noinline size_t if_nlmsg_size(const struct net_device *dev, 914 u32 ext_filter_mask) 915 { 916 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 917 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 918 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 919 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 920 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 921 + nla_total_size(sizeof(struct rtnl_link_stats)) 922 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 923 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 924 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 925 + nla_total_size(4) /* IFLA_TXQLEN */ 926 + nla_total_size(4) /* IFLA_WEIGHT */ 927 + nla_total_size(4) /* IFLA_MTU */ 928 + nla_total_size(4) /* IFLA_LINK */ 929 + nla_total_size(4) /* IFLA_MASTER */ 930 + nla_total_size(1) /* IFLA_CARRIER */ 931 + nla_total_size(4) /* IFLA_PROMISCUITY */ 932 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 933 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 934 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 935 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 936 + nla_total_size(1) /* IFLA_OPERSTATE */ 937 + nla_total_size(1) /* IFLA_LINKMODE */ 938 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 939 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 940 + nla_total_size(ext_filter_mask 941 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 942 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 943 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 944 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 945 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 946 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 947 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 948 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 949 + rtnl_xdp_size(dev) /* IFLA_XDP */ 950 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 951 952 } 953 954 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 955 { 956 struct nlattr *vf_ports; 957 struct nlattr *vf_port; 958 int vf; 959 int err; 960 961 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 962 if (!vf_ports) 963 return -EMSGSIZE; 964 965 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 966 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 967 if (!vf_port) 968 goto nla_put_failure; 969 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 970 goto nla_put_failure; 971 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 972 if (err == -EMSGSIZE) 973 goto nla_put_failure; 974 if (err) { 975 nla_nest_cancel(skb, vf_port); 976 continue; 977 } 978 nla_nest_end(skb, vf_port); 979 } 980 981 nla_nest_end(skb, vf_ports); 982 983 return 0; 984 985 nla_put_failure: 986 nla_nest_cancel(skb, vf_ports); 987 return -EMSGSIZE; 988 } 989 990 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 991 { 992 struct nlattr *port_self; 993 int err; 994 995 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 996 if (!port_self) 997 return -EMSGSIZE; 998 999 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 1000 if (err) { 1001 nla_nest_cancel(skb, port_self); 1002 return (err == -EMSGSIZE) ? err : 0; 1003 } 1004 1005 nla_nest_end(skb, port_self); 1006 1007 return 0; 1008 } 1009 1010 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1011 u32 ext_filter_mask) 1012 { 1013 int err; 1014 1015 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1016 !(ext_filter_mask & RTEXT_FILTER_VF)) 1017 return 0; 1018 1019 err = rtnl_port_self_fill(skb, dev); 1020 if (err) 1021 return err; 1022 1023 if (dev_num_vf(dev->dev.parent)) { 1024 err = rtnl_vf_ports_fill(skb, dev); 1025 if (err) 1026 return err; 1027 } 1028 1029 return 0; 1030 } 1031 1032 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1033 { 1034 int err; 1035 struct netdev_phys_item_id ppid; 1036 1037 err = dev_get_phys_port_id(dev, &ppid); 1038 if (err) { 1039 if (err == -EOPNOTSUPP) 1040 return 0; 1041 return err; 1042 } 1043 1044 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1045 return -EMSGSIZE; 1046 1047 return 0; 1048 } 1049 1050 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1051 { 1052 char name[IFNAMSIZ]; 1053 int err; 1054 1055 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1056 if (err) { 1057 if (err == -EOPNOTSUPP) 1058 return 0; 1059 return err; 1060 } 1061 1062 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 1063 return -EMSGSIZE; 1064 1065 return 0; 1066 } 1067 1068 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1069 { 1070 int err; 1071 struct switchdev_attr attr = { 1072 .orig_dev = dev, 1073 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1074 .flags = SWITCHDEV_F_NO_RECURSE, 1075 }; 1076 1077 err = switchdev_port_attr_get(dev, &attr); 1078 if (err) { 1079 if (err == -EOPNOTSUPP) 1080 return 0; 1081 return err; 1082 } 1083 1084 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1085 attr.u.ppid.id)) 1086 return -EMSGSIZE; 1087 1088 return 0; 1089 } 1090 1091 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1092 struct net_device *dev) 1093 { 1094 struct rtnl_link_stats64 *sp; 1095 struct nlattr *attr; 1096 1097 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1098 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1099 if (!attr) 1100 return -EMSGSIZE; 1101 1102 sp = nla_data(attr); 1103 dev_get_stats(dev, sp); 1104 1105 attr = nla_reserve(skb, IFLA_STATS, 1106 sizeof(struct rtnl_link_stats)); 1107 if (!attr) 1108 return -EMSGSIZE; 1109 1110 copy_rtnl_link_stats(nla_data(attr), sp); 1111 1112 return 0; 1113 } 1114 1115 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1116 struct net_device *dev, 1117 int vfs_num, 1118 struct nlattr *vfinfo) 1119 { 1120 struct ifla_vf_rss_query_en vf_rss_query_en; 1121 struct nlattr *vf, *vfstats, *vfvlanlist; 1122 struct ifla_vf_link_state vf_linkstate; 1123 struct ifla_vf_vlan_info vf_vlan_info; 1124 struct ifla_vf_spoofchk vf_spoofchk; 1125 struct ifla_vf_tx_rate vf_tx_rate; 1126 struct ifla_vf_stats vf_stats; 1127 struct ifla_vf_trust vf_trust; 1128 struct ifla_vf_vlan vf_vlan; 1129 struct ifla_vf_rate vf_rate; 1130 struct ifla_vf_mac vf_mac; 1131 struct ifla_vf_info ivi; 1132 1133 /* Not all SR-IOV capable drivers support the 1134 * spoofcheck and "RSS query enable" query. Preset to 1135 * -1 so the user space tool can detect that the driver 1136 * didn't report anything. 1137 */ 1138 ivi.spoofchk = -1; 1139 ivi.rss_query_en = -1; 1140 ivi.trusted = -1; 1141 memset(ivi.mac, 0, sizeof(ivi.mac)); 1142 /* The default value for VF link state is "auto" 1143 * IFLA_VF_LINK_STATE_AUTO which equals zero 1144 */ 1145 ivi.linkstate = 0; 1146 /* VLAN Protocol by default is 802.1Q */ 1147 ivi.vlan_proto = htons(ETH_P_8021Q); 1148 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1149 return 0; 1150 1151 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1152 1153 vf_mac.vf = 1154 vf_vlan.vf = 1155 vf_vlan_info.vf = 1156 vf_rate.vf = 1157 vf_tx_rate.vf = 1158 vf_spoofchk.vf = 1159 vf_linkstate.vf = 1160 vf_rss_query_en.vf = 1161 vf_trust.vf = ivi.vf; 1162 1163 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1164 vf_vlan.vlan = ivi.vlan; 1165 vf_vlan.qos = ivi.qos; 1166 vf_vlan_info.vlan = ivi.vlan; 1167 vf_vlan_info.qos = ivi.qos; 1168 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1169 vf_tx_rate.rate = ivi.max_tx_rate; 1170 vf_rate.min_tx_rate = ivi.min_tx_rate; 1171 vf_rate.max_tx_rate = ivi.max_tx_rate; 1172 vf_spoofchk.setting = ivi.spoofchk; 1173 vf_linkstate.link_state = ivi.linkstate; 1174 vf_rss_query_en.setting = ivi.rss_query_en; 1175 vf_trust.setting = ivi.trusted; 1176 vf = nla_nest_start(skb, IFLA_VF_INFO); 1177 if (!vf) 1178 goto nla_put_vfinfo_failure; 1179 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1180 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1181 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1182 &vf_rate) || 1183 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1184 &vf_tx_rate) || 1185 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1186 &vf_spoofchk) || 1187 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1188 &vf_linkstate) || 1189 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1190 sizeof(vf_rss_query_en), 1191 &vf_rss_query_en) || 1192 nla_put(skb, IFLA_VF_TRUST, 1193 sizeof(vf_trust), &vf_trust)) 1194 goto nla_put_vf_failure; 1195 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST); 1196 if (!vfvlanlist) 1197 goto nla_put_vf_failure; 1198 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1199 &vf_vlan_info)) { 1200 nla_nest_cancel(skb, vfvlanlist); 1201 goto nla_put_vf_failure; 1202 } 1203 nla_nest_end(skb, vfvlanlist); 1204 memset(&vf_stats, 0, sizeof(vf_stats)); 1205 if (dev->netdev_ops->ndo_get_vf_stats) 1206 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1207 &vf_stats); 1208 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1209 if (!vfstats) 1210 goto nla_put_vf_failure; 1211 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1212 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1213 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1214 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1215 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1216 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1217 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1218 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1219 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1220 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1221 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1222 vf_stats.multicast, IFLA_VF_STATS_PAD)) { 1223 nla_nest_cancel(skb, vfstats); 1224 goto nla_put_vf_failure; 1225 } 1226 nla_nest_end(skb, vfstats); 1227 nla_nest_end(skb, vf); 1228 return 0; 1229 1230 nla_put_vf_failure: 1231 nla_nest_cancel(skb, vf); 1232 nla_put_vfinfo_failure: 1233 nla_nest_cancel(skb, vfinfo); 1234 return -EMSGSIZE; 1235 } 1236 1237 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1238 { 1239 struct rtnl_link_ifmap map; 1240 1241 memset(&map, 0, sizeof(map)); 1242 map.mem_start = dev->mem_start; 1243 map.mem_end = dev->mem_end; 1244 map.base_addr = dev->base_addr; 1245 map.irq = dev->irq; 1246 map.dma = dev->dma; 1247 map.port = dev->if_port; 1248 1249 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1250 return -EMSGSIZE; 1251 1252 return 0; 1253 } 1254 1255 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1256 { 1257 struct netdev_xdp xdp_op = {}; 1258 struct nlattr *xdp; 1259 int err; 1260 1261 if (!dev->netdev_ops->ndo_xdp) 1262 return 0; 1263 xdp = nla_nest_start(skb, IFLA_XDP); 1264 if (!xdp) 1265 return -EMSGSIZE; 1266 xdp_op.command = XDP_QUERY_PROG; 1267 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op); 1268 if (err) 1269 goto err_cancel; 1270 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached); 1271 if (err) 1272 goto err_cancel; 1273 1274 nla_nest_end(skb, xdp); 1275 return 0; 1276 1277 err_cancel: 1278 nla_nest_cancel(skb, xdp); 1279 return err; 1280 } 1281 1282 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1283 int type, u32 pid, u32 seq, u32 change, 1284 unsigned int flags, u32 ext_filter_mask) 1285 { 1286 struct ifinfomsg *ifm; 1287 struct nlmsghdr *nlh; 1288 struct nlattr *af_spec; 1289 struct rtnl_af_ops *af_ops; 1290 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1291 1292 ASSERT_RTNL(); 1293 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1294 if (nlh == NULL) 1295 return -EMSGSIZE; 1296 1297 ifm = nlmsg_data(nlh); 1298 ifm->ifi_family = AF_UNSPEC; 1299 ifm->__ifi_pad = 0; 1300 ifm->ifi_type = dev->type; 1301 ifm->ifi_index = dev->ifindex; 1302 ifm->ifi_flags = dev_get_flags(dev); 1303 ifm->ifi_change = change; 1304 1305 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1306 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1307 nla_put_u8(skb, IFLA_OPERSTATE, 1308 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1309 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1310 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1311 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1312 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1313 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1314 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1315 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1316 #ifdef CONFIG_RPS 1317 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1318 #endif 1319 (dev->ifindex != dev_get_iflink(dev) && 1320 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1321 (upper_dev && 1322 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1323 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1324 (dev->qdisc && 1325 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1326 (dev->ifalias && 1327 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1328 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1329 atomic_read(&dev->carrier_changes)) || 1330 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1331 goto nla_put_failure; 1332 1333 if (rtnl_fill_link_ifmap(skb, dev)) 1334 goto nla_put_failure; 1335 1336 if (dev->addr_len) { 1337 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1338 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1339 goto nla_put_failure; 1340 } 1341 1342 if (rtnl_phys_port_id_fill(skb, dev)) 1343 goto nla_put_failure; 1344 1345 if (rtnl_phys_port_name_fill(skb, dev)) 1346 goto nla_put_failure; 1347 1348 if (rtnl_phys_switch_id_fill(skb, dev)) 1349 goto nla_put_failure; 1350 1351 if (rtnl_fill_stats(skb, dev)) 1352 goto nla_put_failure; 1353 1354 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1355 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1356 goto nla_put_failure; 1357 1358 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1359 ext_filter_mask & RTEXT_FILTER_VF) { 1360 int i; 1361 struct nlattr *vfinfo; 1362 int num_vfs = dev_num_vf(dev->dev.parent); 1363 1364 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1365 if (!vfinfo) 1366 goto nla_put_failure; 1367 for (i = 0; i < num_vfs; i++) { 1368 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1369 goto nla_put_failure; 1370 } 1371 1372 nla_nest_end(skb, vfinfo); 1373 } 1374 1375 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1376 goto nla_put_failure; 1377 1378 if (rtnl_xdp_fill(skb, dev)) 1379 goto nla_put_failure; 1380 1381 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1382 if (rtnl_link_fill(skb, dev) < 0) 1383 goto nla_put_failure; 1384 } 1385 1386 if (dev->rtnl_link_ops && 1387 dev->rtnl_link_ops->get_link_net) { 1388 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1389 1390 if (!net_eq(dev_net(dev), link_net)) { 1391 int id = peernet2id_alloc(dev_net(dev), link_net); 1392 1393 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1394 goto nla_put_failure; 1395 } 1396 } 1397 1398 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1399 goto nla_put_failure; 1400 1401 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1402 if (af_ops->fill_link_af) { 1403 struct nlattr *af; 1404 int err; 1405 1406 if (!(af = nla_nest_start(skb, af_ops->family))) 1407 goto nla_put_failure; 1408 1409 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1410 1411 /* 1412 * Caller may return ENODATA to indicate that there 1413 * was no data to be dumped. This is not an error, it 1414 * means we should trim the attribute header and 1415 * continue. 1416 */ 1417 if (err == -ENODATA) 1418 nla_nest_cancel(skb, af); 1419 else if (err < 0) 1420 goto nla_put_failure; 1421 1422 nla_nest_end(skb, af); 1423 } 1424 } 1425 1426 nla_nest_end(skb, af_spec); 1427 1428 nlmsg_end(skb, nlh); 1429 return 0; 1430 1431 nla_put_failure: 1432 nlmsg_cancel(skb, nlh); 1433 return -EMSGSIZE; 1434 } 1435 1436 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1437 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1438 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1439 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1440 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1441 [IFLA_MTU] = { .type = NLA_U32 }, 1442 [IFLA_LINK] = { .type = NLA_U32 }, 1443 [IFLA_MASTER] = { .type = NLA_U32 }, 1444 [IFLA_CARRIER] = { .type = NLA_U8 }, 1445 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1446 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1447 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1448 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1449 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1450 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1451 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1452 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1453 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1454 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1455 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1456 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1457 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1458 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1459 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1460 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1461 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1462 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1463 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1464 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1465 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1466 [IFLA_XDP] = { .type = NLA_NESTED }, 1467 }; 1468 1469 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1470 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1471 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1472 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1473 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1474 }; 1475 1476 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1477 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1478 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1479 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1480 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1481 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1482 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1483 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1484 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1485 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1486 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1487 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1488 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1489 }; 1490 1491 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1492 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1493 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1494 .len = PORT_PROFILE_MAX }, 1495 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1496 .len = sizeof(struct ifla_port_vsi)}, 1497 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1498 .len = PORT_UUID_MAX }, 1499 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1500 .len = PORT_UUID_MAX }, 1501 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1502 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1503 }; 1504 1505 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1506 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1507 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 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 2168 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2169 ifla_xdp_policy); 2170 if (err < 0) 2171 goto errout; 2172 2173 if (xdp[IFLA_XDP_ATTACHED]) { 2174 err = -EINVAL; 2175 goto errout; 2176 } 2177 if (xdp[IFLA_XDP_FD]) { 2178 err = dev_change_xdp_fd(dev, 2179 nla_get_s32(xdp[IFLA_XDP_FD])); 2180 if (err) 2181 goto errout; 2182 status |= DO_SETLINK_NOTIFY; 2183 } 2184 } 2185 2186 errout: 2187 if (status & DO_SETLINK_MODIFIED) { 2188 if (status & DO_SETLINK_NOTIFY) 2189 netdev_state_change(dev); 2190 2191 if (err < 0) 2192 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", 2193 dev->name); 2194 } 2195 2196 return err; 2197 } 2198 2199 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2200 { 2201 struct net *net = sock_net(skb->sk); 2202 struct ifinfomsg *ifm; 2203 struct net_device *dev; 2204 int err; 2205 struct nlattr *tb[IFLA_MAX+1]; 2206 char ifname[IFNAMSIZ]; 2207 2208 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2209 if (err < 0) 2210 goto errout; 2211 2212 if (tb[IFLA_IFNAME]) 2213 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2214 else 2215 ifname[0] = '\0'; 2216 2217 err = -EINVAL; 2218 ifm = nlmsg_data(nlh); 2219 if (ifm->ifi_index > 0) 2220 dev = __dev_get_by_index(net, ifm->ifi_index); 2221 else if (tb[IFLA_IFNAME]) 2222 dev = __dev_get_by_name(net, ifname); 2223 else 2224 goto errout; 2225 2226 if (dev == NULL) { 2227 err = -ENODEV; 2228 goto errout; 2229 } 2230 2231 err = validate_linkmsg(dev, tb); 2232 if (err < 0) 2233 goto errout; 2234 2235 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 2236 errout: 2237 return err; 2238 } 2239 2240 static int rtnl_group_dellink(const struct net *net, int group) 2241 { 2242 struct net_device *dev, *aux; 2243 LIST_HEAD(list_kill); 2244 bool found = false; 2245 2246 if (!group) 2247 return -EPERM; 2248 2249 for_each_netdev(net, dev) { 2250 if (dev->group == group) { 2251 const struct rtnl_link_ops *ops; 2252 2253 found = true; 2254 ops = dev->rtnl_link_ops; 2255 if (!ops || !ops->dellink) 2256 return -EOPNOTSUPP; 2257 } 2258 } 2259 2260 if (!found) 2261 return -ENODEV; 2262 2263 for_each_netdev_safe(net, dev, aux) { 2264 if (dev->group == group) { 2265 const struct rtnl_link_ops *ops; 2266 2267 ops = dev->rtnl_link_ops; 2268 ops->dellink(dev, &list_kill); 2269 } 2270 } 2271 unregister_netdevice_many(&list_kill); 2272 2273 return 0; 2274 } 2275 2276 int rtnl_delete_link(struct net_device *dev) 2277 { 2278 const struct rtnl_link_ops *ops; 2279 LIST_HEAD(list_kill); 2280 2281 ops = dev->rtnl_link_ops; 2282 if (!ops || !ops->dellink) 2283 return -EOPNOTSUPP; 2284 2285 ops->dellink(dev, &list_kill); 2286 unregister_netdevice_many(&list_kill); 2287 2288 return 0; 2289 } 2290 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2291 2292 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2293 { 2294 struct net *net = sock_net(skb->sk); 2295 struct net_device *dev; 2296 struct ifinfomsg *ifm; 2297 char ifname[IFNAMSIZ]; 2298 struct nlattr *tb[IFLA_MAX+1]; 2299 int err; 2300 2301 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2302 if (err < 0) 2303 return err; 2304 2305 if (tb[IFLA_IFNAME]) 2306 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2307 2308 ifm = nlmsg_data(nlh); 2309 if (ifm->ifi_index > 0) 2310 dev = __dev_get_by_index(net, ifm->ifi_index); 2311 else if (tb[IFLA_IFNAME]) 2312 dev = __dev_get_by_name(net, ifname); 2313 else if (tb[IFLA_GROUP]) 2314 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2315 else 2316 return -EINVAL; 2317 2318 if (!dev) 2319 return -ENODEV; 2320 2321 return rtnl_delete_link(dev); 2322 } 2323 2324 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2325 { 2326 unsigned int old_flags; 2327 int err; 2328 2329 old_flags = dev->flags; 2330 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2331 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2332 if (err < 0) 2333 return err; 2334 } 2335 2336 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2337 2338 __dev_notify_flags(dev, old_flags, ~0U); 2339 return 0; 2340 } 2341 EXPORT_SYMBOL(rtnl_configure_link); 2342 2343 struct net_device *rtnl_create_link(struct net *net, 2344 const char *ifname, unsigned char name_assign_type, 2345 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2346 { 2347 int err; 2348 struct net_device *dev; 2349 unsigned int num_tx_queues = 1; 2350 unsigned int num_rx_queues = 1; 2351 2352 if (tb[IFLA_NUM_TX_QUEUES]) 2353 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2354 else if (ops->get_num_tx_queues) 2355 num_tx_queues = ops->get_num_tx_queues(); 2356 2357 if (tb[IFLA_NUM_RX_QUEUES]) 2358 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2359 else if (ops->get_num_rx_queues) 2360 num_rx_queues = ops->get_num_rx_queues(); 2361 2362 err = -ENOMEM; 2363 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2364 ops->setup, num_tx_queues, num_rx_queues); 2365 if (!dev) 2366 goto err; 2367 2368 dev_net_set(dev, net); 2369 dev->rtnl_link_ops = ops; 2370 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2371 2372 if (tb[IFLA_MTU]) 2373 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2374 if (tb[IFLA_ADDRESS]) { 2375 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2376 nla_len(tb[IFLA_ADDRESS])); 2377 dev->addr_assign_type = NET_ADDR_SET; 2378 } 2379 if (tb[IFLA_BROADCAST]) 2380 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2381 nla_len(tb[IFLA_BROADCAST])); 2382 if (tb[IFLA_TXQLEN]) 2383 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2384 if (tb[IFLA_OPERSTATE]) 2385 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2386 if (tb[IFLA_LINKMODE]) 2387 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2388 if (tb[IFLA_GROUP]) 2389 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2390 2391 return dev; 2392 2393 err: 2394 return ERR_PTR(err); 2395 } 2396 EXPORT_SYMBOL(rtnl_create_link); 2397 2398 static int rtnl_group_changelink(const struct sk_buff *skb, 2399 struct net *net, int group, 2400 struct ifinfomsg *ifm, 2401 struct nlattr **tb) 2402 { 2403 struct net_device *dev, *aux; 2404 int err; 2405 2406 for_each_netdev_safe(net, dev, aux) { 2407 if (dev->group == group) { 2408 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2409 if (err < 0) 2410 return err; 2411 } 2412 } 2413 2414 return 0; 2415 } 2416 2417 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2418 { 2419 struct net *net = sock_net(skb->sk); 2420 const struct rtnl_link_ops *ops; 2421 const struct rtnl_link_ops *m_ops = NULL; 2422 struct net_device *dev; 2423 struct net_device *master_dev = NULL; 2424 struct ifinfomsg *ifm; 2425 char kind[MODULE_NAME_LEN]; 2426 char ifname[IFNAMSIZ]; 2427 struct nlattr *tb[IFLA_MAX+1]; 2428 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2429 unsigned char name_assign_type = NET_NAME_USER; 2430 int err; 2431 2432 #ifdef CONFIG_MODULES 2433 replay: 2434 #endif 2435 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2436 if (err < 0) 2437 return err; 2438 2439 if (tb[IFLA_IFNAME]) 2440 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2441 else 2442 ifname[0] = '\0'; 2443 2444 ifm = nlmsg_data(nlh); 2445 if (ifm->ifi_index > 0) 2446 dev = __dev_get_by_index(net, ifm->ifi_index); 2447 else { 2448 if (ifname[0]) 2449 dev = __dev_get_by_name(net, ifname); 2450 else 2451 dev = NULL; 2452 } 2453 2454 if (dev) { 2455 master_dev = netdev_master_upper_dev_get(dev); 2456 if (master_dev) 2457 m_ops = master_dev->rtnl_link_ops; 2458 } 2459 2460 err = validate_linkmsg(dev, tb); 2461 if (err < 0) 2462 return err; 2463 2464 if (tb[IFLA_LINKINFO]) { 2465 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2466 tb[IFLA_LINKINFO], ifla_info_policy); 2467 if (err < 0) 2468 return err; 2469 } else 2470 memset(linkinfo, 0, sizeof(linkinfo)); 2471 2472 if (linkinfo[IFLA_INFO_KIND]) { 2473 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2474 ops = rtnl_link_ops_get(kind); 2475 } else { 2476 kind[0] = '\0'; 2477 ops = NULL; 2478 } 2479 2480 if (1) { 2481 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2482 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2483 struct nlattr **data = NULL; 2484 struct nlattr **slave_data = NULL; 2485 struct net *dest_net, *link_net = NULL; 2486 2487 if (ops) { 2488 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2489 err = nla_parse_nested(attr, ops->maxtype, 2490 linkinfo[IFLA_INFO_DATA], 2491 ops->policy); 2492 if (err < 0) 2493 return err; 2494 data = attr; 2495 } 2496 if (ops->validate) { 2497 err = ops->validate(tb, data); 2498 if (err < 0) 2499 return err; 2500 } 2501 } 2502 2503 if (m_ops) { 2504 if (m_ops->slave_maxtype && 2505 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2506 err = nla_parse_nested(slave_attr, 2507 m_ops->slave_maxtype, 2508 linkinfo[IFLA_INFO_SLAVE_DATA], 2509 m_ops->slave_policy); 2510 if (err < 0) 2511 return err; 2512 slave_data = slave_attr; 2513 } 2514 if (m_ops->slave_validate) { 2515 err = m_ops->slave_validate(tb, slave_data); 2516 if (err < 0) 2517 return err; 2518 } 2519 } 2520 2521 if (dev) { 2522 int status = 0; 2523 2524 if (nlh->nlmsg_flags & NLM_F_EXCL) 2525 return -EEXIST; 2526 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2527 return -EOPNOTSUPP; 2528 2529 if (linkinfo[IFLA_INFO_DATA]) { 2530 if (!ops || ops != dev->rtnl_link_ops || 2531 !ops->changelink) 2532 return -EOPNOTSUPP; 2533 2534 err = ops->changelink(dev, tb, data); 2535 if (err < 0) 2536 return err; 2537 status |= DO_SETLINK_NOTIFY; 2538 } 2539 2540 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2541 if (!m_ops || !m_ops->slave_changelink) 2542 return -EOPNOTSUPP; 2543 2544 err = m_ops->slave_changelink(master_dev, dev, 2545 tb, slave_data); 2546 if (err < 0) 2547 return err; 2548 status |= DO_SETLINK_NOTIFY; 2549 } 2550 2551 return do_setlink(skb, dev, ifm, tb, ifname, status); 2552 } 2553 2554 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2555 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2556 return rtnl_group_changelink(skb, net, 2557 nla_get_u32(tb[IFLA_GROUP]), 2558 ifm, tb); 2559 return -ENODEV; 2560 } 2561 2562 if (tb[IFLA_MAP] || tb[IFLA_MASTER] || tb[IFLA_PROTINFO]) 2563 return -EOPNOTSUPP; 2564 2565 if (!ops) { 2566 #ifdef CONFIG_MODULES 2567 if (kind[0]) { 2568 __rtnl_unlock(); 2569 request_module("rtnl-link-%s", kind); 2570 rtnl_lock(); 2571 ops = rtnl_link_ops_get(kind); 2572 if (ops) 2573 goto replay; 2574 } 2575 #endif 2576 return -EOPNOTSUPP; 2577 } 2578 2579 if (!ops->setup) 2580 return -EOPNOTSUPP; 2581 2582 if (!ifname[0]) { 2583 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2584 name_assign_type = NET_NAME_ENUM; 2585 } 2586 2587 dest_net = rtnl_link_get_net(net, tb); 2588 if (IS_ERR(dest_net)) 2589 return PTR_ERR(dest_net); 2590 2591 err = -EPERM; 2592 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2593 goto out; 2594 2595 if (tb[IFLA_LINK_NETNSID]) { 2596 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2597 2598 link_net = get_net_ns_by_id(dest_net, id); 2599 if (!link_net) { 2600 err = -EINVAL; 2601 goto out; 2602 } 2603 err = -EPERM; 2604 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2605 goto out; 2606 } 2607 2608 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2609 name_assign_type, ops, tb); 2610 if (IS_ERR(dev)) { 2611 err = PTR_ERR(dev); 2612 goto out; 2613 } 2614 2615 dev->ifindex = ifm->ifi_index; 2616 2617 if (ops->newlink) { 2618 err = ops->newlink(link_net ? : net, dev, tb, data); 2619 /* Drivers should call free_netdev() in ->destructor 2620 * and unregister it on failure after registration 2621 * so that device could be finally freed in rtnl_unlock. 2622 */ 2623 if (err < 0) { 2624 /* If device is not registered at all, free it now */ 2625 if (dev->reg_state == NETREG_UNINITIALIZED) 2626 free_netdev(dev); 2627 goto out; 2628 } 2629 } else { 2630 err = register_netdevice(dev); 2631 if (err < 0) { 2632 free_netdev(dev); 2633 goto out; 2634 } 2635 } 2636 err = rtnl_configure_link(dev, ifm); 2637 if (err < 0) 2638 goto out_unregister; 2639 if (link_net) { 2640 err = dev_change_net_namespace(dev, dest_net, ifname); 2641 if (err < 0) 2642 goto out_unregister; 2643 } 2644 out: 2645 if (link_net) 2646 put_net(link_net); 2647 put_net(dest_net); 2648 return err; 2649 out_unregister: 2650 if (ops->newlink) { 2651 LIST_HEAD(list_kill); 2652 2653 ops->dellink(dev, &list_kill); 2654 unregister_netdevice_many(&list_kill); 2655 } else { 2656 unregister_netdevice(dev); 2657 } 2658 goto out; 2659 } 2660 } 2661 2662 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2663 { 2664 struct net *net = sock_net(skb->sk); 2665 struct ifinfomsg *ifm; 2666 char ifname[IFNAMSIZ]; 2667 struct nlattr *tb[IFLA_MAX+1]; 2668 struct net_device *dev = NULL; 2669 struct sk_buff *nskb; 2670 int err; 2671 u32 ext_filter_mask = 0; 2672 2673 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2674 if (err < 0) 2675 return err; 2676 2677 if (tb[IFLA_IFNAME]) 2678 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2679 2680 if (tb[IFLA_EXT_MASK]) 2681 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2682 2683 ifm = nlmsg_data(nlh); 2684 if (ifm->ifi_index > 0) 2685 dev = __dev_get_by_index(net, ifm->ifi_index); 2686 else if (tb[IFLA_IFNAME]) 2687 dev = __dev_get_by_name(net, ifname); 2688 else 2689 return -EINVAL; 2690 2691 if (dev == NULL) 2692 return -ENODEV; 2693 2694 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2695 if (nskb == NULL) 2696 return -ENOBUFS; 2697 2698 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2699 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2700 if (err < 0) { 2701 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2702 WARN_ON(err == -EMSGSIZE); 2703 kfree_skb(nskb); 2704 } else 2705 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2706 2707 return err; 2708 } 2709 2710 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2711 { 2712 struct net *net = sock_net(skb->sk); 2713 struct net_device *dev; 2714 struct nlattr *tb[IFLA_MAX+1]; 2715 u32 ext_filter_mask = 0; 2716 u16 min_ifinfo_dump_size = 0; 2717 int hdrlen; 2718 2719 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2720 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2721 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2722 2723 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2724 if (tb[IFLA_EXT_MASK]) 2725 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2726 } 2727 2728 if (!ext_filter_mask) 2729 return NLMSG_GOODSIZE; 2730 /* 2731 * traverse the list of net devices and compute the minimum 2732 * buffer size based upon the filter mask. 2733 */ 2734 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2735 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2736 if_nlmsg_size(dev, 2737 ext_filter_mask)); 2738 } 2739 2740 return nlmsg_total_size(min_ifinfo_dump_size); 2741 } 2742 2743 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2744 { 2745 int idx; 2746 int s_idx = cb->family; 2747 2748 if (s_idx == 0) 2749 s_idx = 1; 2750 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2751 int type = cb->nlh->nlmsg_type-RTM_BASE; 2752 if (idx < s_idx || idx == PF_PACKET) 2753 continue; 2754 if (rtnl_msg_handlers[idx] == NULL || 2755 rtnl_msg_handlers[idx][type].dumpit == NULL) 2756 continue; 2757 if (idx > s_idx) { 2758 memset(&cb->args[0], 0, sizeof(cb->args)); 2759 cb->prev_seq = 0; 2760 cb->seq = 0; 2761 } 2762 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2763 break; 2764 } 2765 cb->family = idx; 2766 2767 return skb->len; 2768 } 2769 2770 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2771 unsigned int change, gfp_t flags) 2772 { 2773 struct net *net = dev_net(dev); 2774 struct sk_buff *skb; 2775 int err = -ENOBUFS; 2776 size_t if_info_size; 2777 2778 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2779 if (skb == NULL) 2780 goto errout; 2781 2782 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2783 if (err < 0) { 2784 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2785 WARN_ON(err == -EMSGSIZE); 2786 kfree_skb(skb); 2787 goto errout; 2788 } 2789 return skb; 2790 errout: 2791 if (err < 0) 2792 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2793 return NULL; 2794 } 2795 2796 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2797 { 2798 struct net *net = dev_net(dev); 2799 2800 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2801 } 2802 2803 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2804 gfp_t flags) 2805 { 2806 struct sk_buff *skb; 2807 2808 if (dev->reg_state != NETREG_REGISTERED) 2809 return; 2810 2811 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2812 if (skb) 2813 rtmsg_ifinfo_send(skb, dev, flags); 2814 } 2815 EXPORT_SYMBOL(rtmsg_ifinfo); 2816 2817 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2818 struct net_device *dev, 2819 u8 *addr, u16 vid, u32 pid, u32 seq, 2820 int type, unsigned int flags, 2821 int nlflags, u16 ndm_state) 2822 { 2823 struct nlmsghdr *nlh; 2824 struct ndmsg *ndm; 2825 2826 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2827 if (!nlh) 2828 return -EMSGSIZE; 2829 2830 ndm = nlmsg_data(nlh); 2831 ndm->ndm_family = AF_BRIDGE; 2832 ndm->ndm_pad1 = 0; 2833 ndm->ndm_pad2 = 0; 2834 ndm->ndm_flags = flags; 2835 ndm->ndm_type = 0; 2836 ndm->ndm_ifindex = dev->ifindex; 2837 ndm->ndm_state = ndm_state; 2838 2839 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2840 goto nla_put_failure; 2841 if (vid) 2842 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2843 goto nla_put_failure; 2844 2845 nlmsg_end(skb, nlh); 2846 return 0; 2847 2848 nla_put_failure: 2849 nlmsg_cancel(skb, nlh); 2850 return -EMSGSIZE; 2851 } 2852 2853 static inline size_t rtnl_fdb_nlmsg_size(void) 2854 { 2855 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 2856 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 2857 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 2858 0; 2859 } 2860 2861 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2862 u16 ndm_state) 2863 { 2864 struct net *net = dev_net(dev); 2865 struct sk_buff *skb; 2866 int err = -ENOBUFS; 2867 2868 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2869 if (!skb) 2870 goto errout; 2871 2872 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2873 0, 0, type, NTF_SELF, 0, ndm_state); 2874 if (err < 0) { 2875 kfree_skb(skb); 2876 goto errout; 2877 } 2878 2879 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2880 return; 2881 errout: 2882 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2883 } 2884 2885 /** 2886 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2887 */ 2888 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2889 struct nlattr *tb[], 2890 struct net_device *dev, 2891 const unsigned char *addr, u16 vid, 2892 u16 flags) 2893 { 2894 int err = -EINVAL; 2895 2896 /* If aging addresses are supported device will need to 2897 * implement its own handler for this. 2898 */ 2899 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2900 pr_info("%s: FDB only supports static addresses\n", dev->name); 2901 return err; 2902 } 2903 2904 if (vid) { 2905 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2906 return err; 2907 } 2908 2909 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2910 err = dev_uc_add_excl(dev, addr); 2911 else if (is_multicast_ether_addr(addr)) 2912 err = dev_mc_add_excl(dev, addr); 2913 2914 /* Only return duplicate errors if NLM_F_EXCL is set */ 2915 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2916 err = 0; 2917 2918 return err; 2919 } 2920 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2921 2922 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2923 { 2924 u16 vid = 0; 2925 2926 if (vlan_attr) { 2927 if (nla_len(vlan_attr) != sizeof(u16)) { 2928 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2929 return -EINVAL; 2930 } 2931 2932 vid = nla_get_u16(vlan_attr); 2933 2934 if (!vid || vid >= VLAN_VID_MASK) { 2935 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2936 vid); 2937 return -EINVAL; 2938 } 2939 } 2940 *p_vid = vid; 2941 return 0; 2942 } 2943 2944 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2945 { 2946 struct net *net = sock_net(skb->sk); 2947 struct ndmsg *ndm; 2948 struct nlattr *tb[NDA_MAX+1]; 2949 struct net_device *dev; 2950 u8 *addr; 2951 u16 vid; 2952 int err; 2953 2954 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2955 if (err < 0) 2956 return err; 2957 2958 ndm = nlmsg_data(nlh); 2959 if (ndm->ndm_ifindex == 0) { 2960 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2961 return -EINVAL; 2962 } 2963 2964 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2965 if (dev == NULL) { 2966 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2967 return -ENODEV; 2968 } 2969 2970 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2971 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2972 return -EINVAL; 2973 } 2974 2975 addr = nla_data(tb[NDA_LLADDR]); 2976 2977 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2978 if (err) 2979 return err; 2980 2981 err = -EOPNOTSUPP; 2982 2983 /* Support fdb on master device the net/bridge default case */ 2984 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2985 (dev->priv_flags & IFF_BRIDGE_PORT)) { 2986 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 2987 const struct net_device_ops *ops = br_dev->netdev_ops; 2988 2989 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 2990 nlh->nlmsg_flags); 2991 if (err) 2992 goto out; 2993 else 2994 ndm->ndm_flags &= ~NTF_MASTER; 2995 } 2996 2997 /* Embedded bridge, macvlan, and any other device support */ 2998 if ((ndm->ndm_flags & NTF_SELF)) { 2999 if (dev->netdev_ops->ndo_fdb_add) 3000 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 3001 vid, 3002 nlh->nlmsg_flags); 3003 else 3004 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 3005 nlh->nlmsg_flags); 3006 3007 if (!err) { 3008 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3009 ndm->ndm_state); 3010 ndm->ndm_flags &= ~NTF_SELF; 3011 } 3012 } 3013 out: 3014 return err; 3015 } 3016 3017 /** 3018 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3019 */ 3020 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3021 struct nlattr *tb[], 3022 struct net_device *dev, 3023 const unsigned char *addr, u16 vid) 3024 { 3025 int err = -EINVAL; 3026 3027 /* If aging addresses are supported device will need to 3028 * implement its own handler for this. 3029 */ 3030 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3031 pr_info("%s: FDB only supports static addresses\n", dev->name); 3032 return err; 3033 } 3034 3035 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3036 err = dev_uc_del(dev, addr); 3037 else if (is_multicast_ether_addr(addr)) 3038 err = dev_mc_del(dev, addr); 3039 3040 return err; 3041 } 3042 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3043 3044 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 3045 { 3046 struct net *net = sock_net(skb->sk); 3047 struct ndmsg *ndm; 3048 struct nlattr *tb[NDA_MAX+1]; 3049 struct net_device *dev; 3050 int err = -EINVAL; 3051 __u8 *addr; 3052 u16 vid; 3053 3054 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3055 return -EPERM; 3056 3057 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 3058 if (err < 0) 3059 return err; 3060 3061 ndm = nlmsg_data(nlh); 3062 if (ndm->ndm_ifindex == 0) { 3063 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 3064 return -EINVAL; 3065 } 3066 3067 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3068 if (dev == NULL) { 3069 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 3070 return -ENODEV; 3071 } 3072 3073 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3074 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 3075 return -EINVAL; 3076 } 3077 3078 addr = nla_data(tb[NDA_LLADDR]); 3079 3080 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 3081 if (err) 3082 return err; 3083 3084 err = -EOPNOTSUPP; 3085 3086 /* Support fdb on master device the net/bridge default case */ 3087 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3088 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3089 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3090 const struct net_device_ops *ops = br_dev->netdev_ops; 3091 3092 if (ops->ndo_fdb_del) 3093 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3094 3095 if (err) 3096 goto out; 3097 else 3098 ndm->ndm_flags &= ~NTF_MASTER; 3099 } 3100 3101 /* Embedded bridge, macvlan, and any other device support */ 3102 if (ndm->ndm_flags & NTF_SELF) { 3103 if (dev->netdev_ops->ndo_fdb_del) 3104 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3105 vid); 3106 else 3107 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3108 3109 if (!err) { 3110 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3111 ndm->ndm_state); 3112 ndm->ndm_flags &= ~NTF_SELF; 3113 } 3114 } 3115 out: 3116 return err; 3117 } 3118 3119 static int nlmsg_populate_fdb(struct sk_buff *skb, 3120 struct netlink_callback *cb, 3121 struct net_device *dev, 3122 int *idx, 3123 struct netdev_hw_addr_list *list) 3124 { 3125 struct netdev_hw_addr *ha; 3126 int err; 3127 u32 portid, seq; 3128 3129 portid = NETLINK_CB(cb->skb).portid; 3130 seq = cb->nlh->nlmsg_seq; 3131 3132 list_for_each_entry(ha, &list->list, list) { 3133 if (*idx < cb->args[2]) 3134 goto skip; 3135 3136 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3137 portid, seq, 3138 RTM_NEWNEIGH, NTF_SELF, 3139 NLM_F_MULTI, NUD_PERMANENT); 3140 if (err < 0) 3141 return err; 3142 skip: 3143 *idx += 1; 3144 } 3145 return 0; 3146 } 3147 3148 /** 3149 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3150 * @nlh: netlink message header 3151 * @dev: netdevice 3152 * 3153 * Default netdevice operation to dump the existing unicast address list. 3154 * Returns number of addresses from list put in skb. 3155 */ 3156 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3157 struct netlink_callback *cb, 3158 struct net_device *dev, 3159 struct net_device *filter_dev, 3160 int *idx) 3161 { 3162 int err; 3163 3164 netif_addr_lock_bh(dev); 3165 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3166 if (err) 3167 goto out; 3168 nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3169 out: 3170 netif_addr_unlock_bh(dev); 3171 return err; 3172 } 3173 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3174 3175 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3176 { 3177 struct net_device *dev; 3178 struct nlattr *tb[IFLA_MAX+1]; 3179 struct net_device *br_dev = NULL; 3180 const struct net_device_ops *ops = NULL; 3181 const struct net_device_ops *cops = NULL; 3182 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3183 struct net *net = sock_net(skb->sk); 3184 struct hlist_head *head; 3185 int brport_idx = 0; 3186 int br_idx = 0; 3187 int h, s_h; 3188 int idx = 0, s_idx; 3189 int err = 0; 3190 int fidx = 0; 3191 3192 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 3193 ifla_policy) == 0) { 3194 if (tb[IFLA_MASTER]) 3195 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3196 } 3197 3198 brport_idx = ifm->ifi_index; 3199 3200 if (br_idx) { 3201 br_dev = __dev_get_by_index(net, br_idx); 3202 if (!br_dev) 3203 return -ENODEV; 3204 3205 ops = br_dev->netdev_ops; 3206 } 3207 3208 s_h = cb->args[0]; 3209 s_idx = cb->args[1]; 3210 3211 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3212 idx = 0; 3213 head = &net->dev_index_head[h]; 3214 hlist_for_each_entry(dev, head, index_hlist) { 3215 3216 if (brport_idx && (dev->ifindex != brport_idx)) 3217 continue; 3218 3219 if (!br_idx) { /* user did not specify a specific bridge */ 3220 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3221 br_dev = netdev_master_upper_dev_get(dev); 3222 cops = br_dev->netdev_ops; 3223 } 3224 } else { 3225 if (dev != br_dev && 3226 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3227 continue; 3228 3229 if (br_dev != netdev_master_upper_dev_get(dev) && 3230 !(dev->priv_flags & IFF_EBRIDGE)) 3231 continue; 3232 cops = ops; 3233 } 3234 3235 if (idx < s_idx) 3236 goto cont; 3237 3238 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3239 if (cops && cops->ndo_fdb_dump) { 3240 err = cops->ndo_fdb_dump(skb, cb, 3241 br_dev, dev, 3242 &fidx); 3243 if (err == -EMSGSIZE) 3244 goto out; 3245 } 3246 } 3247 3248 if (dev->netdev_ops->ndo_fdb_dump) 3249 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3250 dev, NULL, 3251 &fidx); 3252 else 3253 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3254 &fidx); 3255 if (err == -EMSGSIZE) 3256 goto out; 3257 3258 cops = NULL; 3259 3260 /* reset fdb offset to 0 for rest of the interfaces */ 3261 cb->args[2] = 0; 3262 fidx = 0; 3263 cont: 3264 idx++; 3265 } 3266 } 3267 3268 out: 3269 cb->args[0] = h; 3270 cb->args[1] = idx; 3271 cb->args[2] = fidx; 3272 3273 return skb->len; 3274 } 3275 3276 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3277 unsigned int attrnum, unsigned int flag) 3278 { 3279 if (mask & flag) 3280 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3281 return 0; 3282 } 3283 3284 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3285 struct net_device *dev, u16 mode, 3286 u32 flags, u32 mask, int nlflags, 3287 u32 filter_mask, 3288 int (*vlan_fill)(struct sk_buff *skb, 3289 struct net_device *dev, 3290 u32 filter_mask)) 3291 { 3292 struct nlmsghdr *nlh; 3293 struct ifinfomsg *ifm; 3294 struct nlattr *br_afspec; 3295 struct nlattr *protinfo; 3296 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3297 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3298 int err = 0; 3299 3300 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3301 if (nlh == NULL) 3302 return -EMSGSIZE; 3303 3304 ifm = nlmsg_data(nlh); 3305 ifm->ifi_family = AF_BRIDGE; 3306 ifm->__ifi_pad = 0; 3307 ifm->ifi_type = dev->type; 3308 ifm->ifi_index = dev->ifindex; 3309 ifm->ifi_flags = dev_get_flags(dev); 3310 ifm->ifi_change = 0; 3311 3312 3313 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3314 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3315 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3316 (br_dev && 3317 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3318 (dev->addr_len && 3319 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3320 (dev->ifindex != dev_get_iflink(dev) && 3321 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3322 goto nla_put_failure; 3323 3324 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3325 if (!br_afspec) 3326 goto nla_put_failure; 3327 3328 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3329 nla_nest_cancel(skb, br_afspec); 3330 goto nla_put_failure; 3331 } 3332 3333 if (mode != BRIDGE_MODE_UNDEF) { 3334 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3335 nla_nest_cancel(skb, br_afspec); 3336 goto nla_put_failure; 3337 } 3338 } 3339 if (vlan_fill) { 3340 err = vlan_fill(skb, dev, filter_mask); 3341 if (err) { 3342 nla_nest_cancel(skb, br_afspec); 3343 goto nla_put_failure; 3344 } 3345 } 3346 nla_nest_end(skb, br_afspec); 3347 3348 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3349 if (!protinfo) 3350 goto nla_put_failure; 3351 3352 if (brport_nla_put_flag(skb, flags, mask, 3353 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3354 brport_nla_put_flag(skb, flags, mask, 3355 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3356 brport_nla_put_flag(skb, flags, mask, 3357 IFLA_BRPORT_FAST_LEAVE, 3358 BR_MULTICAST_FAST_LEAVE) || 3359 brport_nla_put_flag(skb, flags, mask, 3360 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3361 brport_nla_put_flag(skb, flags, mask, 3362 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3363 brport_nla_put_flag(skb, flags, mask, 3364 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3365 brport_nla_put_flag(skb, flags, mask, 3366 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3367 brport_nla_put_flag(skb, flags, mask, 3368 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3369 nla_nest_cancel(skb, protinfo); 3370 goto nla_put_failure; 3371 } 3372 3373 nla_nest_end(skb, protinfo); 3374 3375 nlmsg_end(skb, nlh); 3376 return 0; 3377 nla_put_failure: 3378 nlmsg_cancel(skb, nlh); 3379 return err ? err : -EMSGSIZE; 3380 } 3381 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3382 3383 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3384 { 3385 struct net *net = sock_net(skb->sk); 3386 struct net_device *dev; 3387 int idx = 0; 3388 u32 portid = NETLINK_CB(cb->skb).portid; 3389 u32 seq = cb->nlh->nlmsg_seq; 3390 u32 filter_mask = 0; 3391 int err; 3392 3393 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3394 struct nlattr *extfilt; 3395 3396 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3397 IFLA_EXT_MASK); 3398 if (extfilt) { 3399 if (nla_len(extfilt) < sizeof(filter_mask)) 3400 return -EINVAL; 3401 3402 filter_mask = nla_get_u32(extfilt); 3403 } 3404 } 3405 3406 rcu_read_lock(); 3407 for_each_netdev_rcu(net, dev) { 3408 const struct net_device_ops *ops = dev->netdev_ops; 3409 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3410 3411 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3412 if (idx >= cb->args[0]) { 3413 err = br_dev->netdev_ops->ndo_bridge_getlink( 3414 skb, portid, seq, dev, 3415 filter_mask, NLM_F_MULTI); 3416 if (err < 0 && err != -EOPNOTSUPP) 3417 break; 3418 } 3419 idx++; 3420 } 3421 3422 if (ops->ndo_bridge_getlink) { 3423 if (idx >= cb->args[0]) { 3424 err = ops->ndo_bridge_getlink(skb, portid, 3425 seq, dev, 3426 filter_mask, 3427 NLM_F_MULTI); 3428 if (err < 0 && err != -EOPNOTSUPP) 3429 break; 3430 } 3431 idx++; 3432 } 3433 } 3434 rcu_read_unlock(); 3435 cb->args[0] = idx; 3436 3437 return skb->len; 3438 } 3439 3440 static inline size_t bridge_nlmsg_size(void) 3441 { 3442 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3443 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3444 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3445 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3446 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3447 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3448 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3449 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3450 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3451 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3452 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3453 } 3454 3455 static int rtnl_bridge_notify(struct net_device *dev) 3456 { 3457 struct net *net = dev_net(dev); 3458 struct sk_buff *skb; 3459 int err = -EOPNOTSUPP; 3460 3461 if (!dev->netdev_ops->ndo_bridge_getlink) 3462 return 0; 3463 3464 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3465 if (!skb) { 3466 err = -ENOMEM; 3467 goto errout; 3468 } 3469 3470 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3471 if (err < 0) 3472 goto errout; 3473 3474 if (!skb->len) 3475 goto errout; 3476 3477 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3478 return 0; 3479 errout: 3480 WARN_ON(err == -EMSGSIZE); 3481 kfree_skb(skb); 3482 if (err) 3483 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3484 return err; 3485 } 3486 3487 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3488 { 3489 struct net *net = sock_net(skb->sk); 3490 struct ifinfomsg *ifm; 3491 struct net_device *dev; 3492 struct nlattr *br_spec, *attr = NULL; 3493 int rem, err = -EOPNOTSUPP; 3494 u16 flags = 0; 3495 bool have_flags = false; 3496 3497 if (nlmsg_len(nlh) < sizeof(*ifm)) 3498 return -EINVAL; 3499 3500 ifm = nlmsg_data(nlh); 3501 if (ifm->ifi_family != AF_BRIDGE) 3502 return -EPFNOSUPPORT; 3503 3504 dev = __dev_get_by_index(net, ifm->ifi_index); 3505 if (!dev) { 3506 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3507 return -ENODEV; 3508 } 3509 3510 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3511 if (br_spec) { 3512 nla_for_each_nested(attr, br_spec, rem) { 3513 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3514 if (nla_len(attr) < sizeof(flags)) 3515 return -EINVAL; 3516 3517 have_flags = true; 3518 flags = nla_get_u16(attr); 3519 break; 3520 } 3521 } 3522 } 3523 3524 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3525 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3526 3527 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3528 err = -EOPNOTSUPP; 3529 goto out; 3530 } 3531 3532 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3533 if (err) 3534 goto out; 3535 3536 flags &= ~BRIDGE_FLAGS_MASTER; 3537 } 3538 3539 if ((flags & BRIDGE_FLAGS_SELF)) { 3540 if (!dev->netdev_ops->ndo_bridge_setlink) 3541 err = -EOPNOTSUPP; 3542 else 3543 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3544 flags); 3545 if (!err) { 3546 flags &= ~BRIDGE_FLAGS_SELF; 3547 3548 /* Generate event to notify upper layer of bridge 3549 * change 3550 */ 3551 err = rtnl_bridge_notify(dev); 3552 } 3553 } 3554 3555 if (have_flags) 3556 memcpy(nla_data(attr), &flags, sizeof(flags)); 3557 out: 3558 return err; 3559 } 3560 3561 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3562 { 3563 struct net *net = sock_net(skb->sk); 3564 struct ifinfomsg *ifm; 3565 struct net_device *dev; 3566 struct nlattr *br_spec, *attr = NULL; 3567 int rem, err = -EOPNOTSUPP; 3568 u16 flags = 0; 3569 bool have_flags = false; 3570 3571 if (nlmsg_len(nlh) < sizeof(*ifm)) 3572 return -EINVAL; 3573 3574 ifm = nlmsg_data(nlh); 3575 if (ifm->ifi_family != AF_BRIDGE) 3576 return -EPFNOSUPPORT; 3577 3578 dev = __dev_get_by_index(net, ifm->ifi_index); 3579 if (!dev) { 3580 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3581 return -ENODEV; 3582 } 3583 3584 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3585 if (br_spec) { 3586 nla_for_each_nested(attr, br_spec, rem) { 3587 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3588 if (nla_len(attr) < sizeof(flags)) 3589 return -EINVAL; 3590 3591 have_flags = true; 3592 flags = nla_get_u16(attr); 3593 break; 3594 } 3595 } 3596 } 3597 3598 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3599 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3600 3601 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3602 err = -EOPNOTSUPP; 3603 goto out; 3604 } 3605 3606 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3607 if (err) 3608 goto out; 3609 3610 flags &= ~BRIDGE_FLAGS_MASTER; 3611 } 3612 3613 if ((flags & BRIDGE_FLAGS_SELF)) { 3614 if (!dev->netdev_ops->ndo_bridge_dellink) 3615 err = -EOPNOTSUPP; 3616 else 3617 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3618 flags); 3619 3620 if (!err) { 3621 flags &= ~BRIDGE_FLAGS_SELF; 3622 3623 /* Generate event to notify upper layer of bridge 3624 * change 3625 */ 3626 err = rtnl_bridge_notify(dev); 3627 } 3628 } 3629 3630 if (have_flags) 3631 memcpy(nla_data(attr), &flags, sizeof(flags)); 3632 out: 3633 return err; 3634 } 3635 3636 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3637 { 3638 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3639 (!idxattr || idxattr == attrid); 3640 } 3641 3642 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3643 static int rtnl_get_offload_stats_attr_size(int attr_id) 3644 { 3645 switch (attr_id) { 3646 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3647 return sizeof(struct rtnl_link_stats64); 3648 } 3649 3650 return 0; 3651 } 3652 3653 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3654 int *prividx) 3655 { 3656 struct nlattr *attr = NULL; 3657 int attr_id, size; 3658 void *attr_data; 3659 int err; 3660 3661 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3662 dev->netdev_ops->ndo_get_offload_stats)) 3663 return -ENODATA; 3664 3665 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3666 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3667 if (attr_id < *prividx) 3668 continue; 3669 3670 size = rtnl_get_offload_stats_attr_size(attr_id); 3671 if (!size) 3672 continue; 3673 3674 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id)) 3675 continue; 3676 3677 attr = nla_reserve_64bit(skb, attr_id, size, 3678 IFLA_OFFLOAD_XSTATS_UNSPEC); 3679 if (!attr) 3680 goto nla_put_failure; 3681 3682 attr_data = nla_data(attr); 3683 memset(attr_data, 0, size); 3684 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3685 attr_data); 3686 if (err) 3687 goto get_offload_stats_failure; 3688 } 3689 3690 if (!attr) 3691 return -ENODATA; 3692 3693 *prividx = 0; 3694 return 0; 3695 3696 nla_put_failure: 3697 err = -EMSGSIZE; 3698 get_offload_stats_failure: 3699 *prividx = attr_id; 3700 return err; 3701 } 3702 3703 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3704 { 3705 int nla_size = 0; 3706 int attr_id; 3707 int size; 3708 3709 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3710 dev->netdev_ops->ndo_get_offload_stats)) 3711 return 0; 3712 3713 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3714 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3715 if (!dev->netdev_ops->ndo_has_offload_stats(attr_id)) 3716 continue; 3717 size = rtnl_get_offload_stats_attr_size(attr_id); 3718 nla_size += nla_total_size_64bit(size); 3719 } 3720 3721 if (nla_size != 0) 3722 nla_size += nla_total_size(0); 3723 3724 return nla_size; 3725 } 3726 3727 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3728 int type, u32 pid, u32 seq, u32 change, 3729 unsigned int flags, unsigned int filter_mask, 3730 int *idxattr, int *prividx) 3731 { 3732 struct if_stats_msg *ifsm; 3733 struct nlmsghdr *nlh; 3734 struct nlattr *attr; 3735 int s_prividx = *prividx; 3736 int err; 3737 3738 ASSERT_RTNL(); 3739 3740 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3741 if (!nlh) 3742 return -EMSGSIZE; 3743 3744 ifsm = nlmsg_data(nlh); 3745 ifsm->ifindex = dev->ifindex; 3746 ifsm->filter_mask = filter_mask; 3747 3748 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3749 struct rtnl_link_stats64 *sp; 3750 3751 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3752 sizeof(struct rtnl_link_stats64), 3753 IFLA_STATS_UNSPEC); 3754 if (!attr) 3755 goto nla_put_failure; 3756 3757 sp = nla_data(attr); 3758 dev_get_stats(dev, sp); 3759 } 3760 3761 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3762 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3763 3764 if (ops && ops->fill_linkxstats) { 3765 *idxattr = IFLA_STATS_LINK_XSTATS; 3766 attr = nla_nest_start(skb, 3767 IFLA_STATS_LINK_XSTATS); 3768 if (!attr) 3769 goto nla_put_failure; 3770 3771 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3772 nla_nest_end(skb, attr); 3773 if (err) 3774 goto nla_put_failure; 3775 *idxattr = 0; 3776 } 3777 } 3778 3779 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3780 *idxattr)) { 3781 const struct rtnl_link_ops *ops = NULL; 3782 const struct net_device *master; 3783 3784 master = netdev_master_upper_dev_get(dev); 3785 if (master) 3786 ops = master->rtnl_link_ops; 3787 if (ops && ops->fill_linkxstats) { 3788 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3789 attr = nla_nest_start(skb, 3790 IFLA_STATS_LINK_XSTATS_SLAVE); 3791 if (!attr) 3792 goto nla_put_failure; 3793 3794 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3795 nla_nest_end(skb, attr); 3796 if (err) 3797 goto nla_put_failure; 3798 *idxattr = 0; 3799 } 3800 } 3801 3802 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 3803 *idxattr)) { 3804 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 3805 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 3806 if (!attr) 3807 goto nla_put_failure; 3808 3809 err = rtnl_get_offload_stats(skb, dev, prividx); 3810 if (err == -ENODATA) 3811 nla_nest_cancel(skb, attr); 3812 else 3813 nla_nest_end(skb, attr); 3814 3815 if (err && err != -ENODATA) 3816 goto nla_put_failure; 3817 *idxattr = 0; 3818 } 3819 3820 nlmsg_end(skb, nlh); 3821 3822 return 0; 3823 3824 nla_put_failure: 3825 /* not a multi message or no progress mean a real error */ 3826 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 3827 nlmsg_cancel(skb, nlh); 3828 else 3829 nlmsg_end(skb, nlh); 3830 3831 return -EMSGSIZE; 3832 } 3833 3834 static size_t if_nlmsg_stats_size(const struct net_device *dev, 3835 u32 filter_mask) 3836 { 3837 size_t size = 0; 3838 3839 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 3840 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 3841 3842 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 3843 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3844 int attr = IFLA_STATS_LINK_XSTATS; 3845 3846 if (ops && ops->get_linkxstats_size) { 3847 size += nla_total_size(ops->get_linkxstats_size(dev, 3848 attr)); 3849 /* for IFLA_STATS_LINK_XSTATS */ 3850 size += nla_total_size(0); 3851 } 3852 } 3853 3854 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 3855 struct net_device *_dev = (struct net_device *)dev; 3856 const struct rtnl_link_ops *ops = NULL; 3857 const struct net_device *master; 3858 3859 /* netdev_master_upper_dev_get can't take const */ 3860 master = netdev_master_upper_dev_get(_dev); 3861 if (master) 3862 ops = master->rtnl_link_ops; 3863 if (ops && ops->get_linkxstats_size) { 3864 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 3865 3866 size += nla_total_size(ops->get_linkxstats_size(dev, 3867 attr)); 3868 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 3869 size += nla_total_size(0); 3870 } 3871 } 3872 3873 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 3874 size += rtnl_get_offload_stats_size(dev); 3875 3876 return size; 3877 } 3878 3879 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh) 3880 { 3881 struct net *net = sock_net(skb->sk); 3882 struct net_device *dev = NULL; 3883 int idxattr = 0, prividx = 0; 3884 struct if_stats_msg *ifsm; 3885 struct sk_buff *nskb; 3886 u32 filter_mask; 3887 int err; 3888 3889 ifsm = nlmsg_data(nlh); 3890 if (ifsm->ifindex > 0) 3891 dev = __dev_get_by_index(net, ifsm->ifindex); 3892 else 3893 return -EINVAL; 3894 3895 if (!dev) 3896 return -ENODEV; 3897 3898 filter_mask = ifsm->filter_mask; 3899 if (!filter_mask) 3900 return -EINVAL; 3901 3902 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 3903 if (!nskb) 3904 return -ENOBUFS; 3905 3906 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 3907 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 3908 0, filter_mask, &idxattr, &prividx); 3909 if (err < 0) { 3910 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 3911 WARN_ON(err == -EMSGSIZE); 3912 kfree_skb(nskb); 3913 } else { 3914 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3915 } 3916 3917 return err; 3918 } 3919 3920 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 3921 { 3922 int h, s_h, err, s_idx, s_idxattr, s_prividx; 3923 struct net *net = sock_net(skb->sk); 3924 unsigned int flags = NLM_F_MULTI; 3925 struct if_stats_msg *ifsm; 3926 struct hlist_head *head; 3927 struct net_device *dev; 3928 u32 filter_mask = 0; 3929 int idx = 0; 3930 3931 s_h = cb->args[0]; 3932 s_idx = cb->args[1]; 3933 s_idxattr = cb->args[2]; 3934 s_prividx = cb->args[3]; 3935 3936 cb->seq = net->dev_base_seq; 3937 3938 ifsm = nlmsg_data(cb->nlh); 3939 filter_mask = ifsm->filter_mask; 3940 if (!filter_mask) 3941 return -EINVAL; 3942 3943 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3944 idx = 0; 3945 head = &net->dev_index_head[h]; 3946 hlist_for_each_entry(dev, head, index_hlist) { 3947 if (idx < s_idx) 3948 goto cont; 3949 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 3950 NETLINK_CB(cb->skb).portid, 3951 cb->nlh->nlmsg_seq, 0, 3952 flags, filter_mask, 3953 &s_idxattr, &s_prividx); 3954 /* If we ran out of room on the first message, 3955 * we're in trouble 3956 */ 3957 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 3958 3959 if (err < 0) 3960 goto out; 3961 s_prividx = 0; 3962 s_idxattr = 0; 3963 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 3964 cont: 3965 idx++; 3966 } 3967 } 3968 out: 3969 cb->args[3] = s_prividx; 3970 cb->args[2] = s_idxattr; 3971 cb->args[1] = idx; 3972 cb->args[0] = h; 3973 3974 return skb->len; 3975 } 3976 3977 /* Process one rtnetlink message. */ 3978 3979 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 3980 { 3981 struct net *net = sock_net(skb->sk); 3982 rtnl_doit_func doit; 3983 int kind; 3984 int family; 3985 int type; 3986 int err; 3987 3988 type = nlh->nlmsg_type; 3989 if (type > RTM_MAX) 3990 return -EOPNOTSUPP; 3991 3992 type -= RTM_BASE; 3993 3994 /* All the messages must have at least 1 byte length */ 3995 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 3996 return 0; 3997 3998 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 3999 kind = type&3; 4000 4001 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 4002 return -EPERM; 4003 4004 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 4005 struct sock *rtnl; 4006 rtnl_dumpit_func dumpit; 4007 rtnl_calcit_func calcit; 4008 u16 min_dump_alloc = 0; 4009 4010 dumpit = rtnl_get_dumpit(family, type); 4011 if (dumpit == NULL) 4012 return -EOPNOTSUPP; 4013 calcit = rtnl_get_calcit(family, type); 4014 if (calcit) 4015 min_dump_alloc = calcit(skb, nlh); 4016 4017 __rtnl_unlock(); 4018 rtnl = net->rtnl; 4019 { 4020 struct netlink_dump_control c = { 4021 .dump = dumpit, 4022 .min_dump_alloc = min_dump_alloc, 4023 }; 4024 err = netlink_dump_start(rtnl, skb, nlh, &c); 4025 } 4026 rtnl_lock(); 4027 return err; 4028 } 4029 4030 doit = rtnl_get_doit(family, type); 4031 if (doit == NULL) 4032 return -EOPNOTSUPP; 4033 4034 return doit(skb, nlh); 4035 } 4036 4037 static void rtnetlink_rcv(struct sk_buff *skb) 4038 { 4039 rtnl_lock(); 4040 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4041 rtnl_unlock(); 4042 } 4043 4044 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4045 { 4046 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4047 4048 switch (event) { 4049 case NETDEV_UP: 4050 case NETDEV_DOWN: 4051 case NETDEV_PRE_UP: 4052 case NETDEV_POST_INIT: 4053 case NETDEV_REGISTER: 4054 case NETDEV_CHANGE: 4055 case NETDEV_PRE_TYPE_CHANGE: 4056 case NETDEV_GOING_DOWN: 4057 case NETDEV_UNREGISTER: 4058 case NETDEV_UNREGISTER_FINAL: 4059 case NETDEV_RELEASE: 4060 case NETDEV_JOIN: 4061 case NETDEV_BONDING_INFO: 4062 break; 4063 default: 4064 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 4065 break; 4066 } 4067 return NOTIFY_DONE; 4068 } 4069 4070 static struct notifier_block rtnetlink_dev_notifier = { 4071 .notifier_call = rtnetlink_event, 4072 }; 4073 4074 4075 static int __net_init rtnetlink_net_init(struct net *net) 4076 { 4077 struct sock *sk; 4078 struct netlink_kernel_cfg cfg = { 4079 .groups = RTNLGRP_MAX, 4080 .input = rtnetlink_rcv, 4081 .cb_mutex = &rtnl_mutex, 4082 .flags = NL_CFG_F_NONROOT_RECV, 4083 }; 4084 4085 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4086 if (!sk) 4087 return -ENOMEM; 4088 net->rtnl = sk; 4089 return 0; 4090 } 4091 4092 static void __net_exit rtnetlink_net_exit(struct net *net) 4093 { 4094 netlink_kernel_release(net->rtnl); 4095 net->rtnl = NULL; 4096 } 4097 4098 static struct pernet_operations rtnetlink_net_ops = { 4099 .init = rtnetlink_net_init, 4100 .exit = rtnetlink_net_exit, 4101 }; 4102 4103 void __init rtnetlink_init(void) 4104 { 4105 if (register_pernet_subsys(&rtnetlink_net_ops)) 4106 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4107 4108 register_netdevice_notifier(&rtnetlink_dev_notifier); 4109 4110 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4111 rtnl_dump_ifinfo, rtnl_calcit); 4112 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 4113 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 4114 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 4115 4116 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 4117 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 4118 4119 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 4120 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 4121 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 4122 4123 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 4124 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 4125 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 4126 4127 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4128 NULL); 4129 } 4130