1 /* 2 * INET An implementation of the TCP/IP protocol suite for the LINUX 3 * operating system. INET is implemented using the BSD Socket 4 * interface as the means of communication with the user level. 5 * 6 * Routing netlink socket interface: protocol independent part. 7 * 8 * Authors: Alexey Kuznetsov, <kuznet@ms2.inr.ac.ru> 9 * 10 * This program is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU General Public License 12 * as published by the Free Software Foundation; either version 13 * 2 of the License, or (at your option) any later version. 14 * 15 * Fixes: 16 * Vitaly E. Lavrov RTA_OK arithmetics was wrong. 17 */ 18 19 #include <linux/errno.h> 20 #include <linux/module.h> 21 #include <linux/types.h> 22 #include <linux/socket.h> 23 #include <linux/kernel.h> 24 #include <linux/timer.h> 25 #include <linux/string.h> 26 #include <linux/sockios.h> 27 #include <linux/net.h> 28 #include <linux/fcntl.h> 29 #include <linux/mm.h> 30 #include <linux/slab.h> 31 #include <linux/interrupt.h> 32 #include <linux/capability.h> 33 #include <linux/skbuff.h> 34 #include <linux/init.h> 35 #include <linux/security.h> 36 #include <linux/mutex.h> 37 #include <linux/if_addr.h> 38 #include <linux/if_bridge.h> 39 #include <linux/if_vlan.h> 40 #include <linux/pci.h> 41 #include <linux/etherdevice.h> 42 43 #include <linux/uaccess.h> 44 45 #include <linux/inet.h> 46 #include <linux/netdevice.h> 47 #include <net/switchdev.h> 48 #include <net/ip.h> 49 #include <net/protocol.h> 50 #include <net/arp.h> 51 #include <net/route.h> 52 #include <net/udp.h> 53 #include <net/tcp.h> 54 #include <net/sock.h> 55 #include <net/pkt_sched.h> 56 #include <net/fib_rules.h> 57 #include <net/rtnetlink.h> 58 #include <net/net_namespace.h> 59 60 struct rtnl_link { 61 rtnl_doit_func doit; 62 rtnl_dumpit_func dumpit; 63 rtnl_calcit_func calcit; 64 }; 65 66 static DEFINE_MUTEX(rtnl_mutex); 67 68 void rtnl_lock(void) 69 { 70 mutex_lock(&rtnl_mutex); 71 } 72 EXPORT_SYMBOL(rtnl_lock); 73 74 static struct sk_buff *defer_kfree_skb_list; 75 void rtnl_kfree_skbs(struct sk_buff *head, struct sk_buff *tail) 76 { 77 if (head && tail) { 78 tail->next = defer_kfree_skb_list; 79 defer_kfree_skb_list = head; 80 } 81 } 82 EXPORT_SYMBOL(rtnl_kfree_skbs); 83 84 void __rtnl_unlock(void) 85 { 86 struct sk_buff *head = defer_kfree_skb_list; 87 88 defer_kfree_skb_list = NULL; 89 90 mutex_unlock(&rtnl_mutex); 91 92 while (head) { 93 struct sk_buff *next = head->next; 94 95 kfree_skb(head); 96 cond_resched(); 97 head = next; 98 } 99 } 100 101 void rtnl_unlock(void) 102 { 103 /* This fellow will unlock it for us. */ 104 netdev_run_todo(); 105 } 106 EXPORT_SYMBOL(rtnl_unlock); 107 108 int rtnl_trylock(void) 109 { 110 return mutex_trylock(&rtnl_mutex); 111 } 112 EXPORT_SYMBOL(rtnl_trylock); 113 114 int rtnl_is_locked(void) 115 { 116 return mutex_is_locked(&rtnl_mutex); 117 } 118 EXPORT_SYMBOL(rtnl_is_locked); 119 120 #ifdef CONFIG_PROVE_LOCKING 121 bool lockdep_rtnl_is_held(void) 122 { 123 return lockdep_is_held(&rtnl_mutex); 124 } 125 EXPORT_SYMBOL(lockdep_rtnl_is_held); 126 #endif /* #ifdef CONFIG_PROVE_LOCKING */ 127 128 static struct rtnl_link *rtnl_msg_handlers[RTNL_FAMILY_MAX + 1]; 129 130 static inline int rtm_msgindex(int msgtype) 131 { 132 int msgindex = msgtype - RTM_BASE; 133 134 /* 135 * msgindex < 0 implies someone tried to register a netlink 136 * control code. msgindex >= RTM_NR_MSGTYPES may indicate that 137 * the message type has not been added to linux/rtnetlink.h 138 */ 139 BUG_ON(msgindex < 0 || msgindex >= RTM_NR_MSGTYPES); 140 141 return msgindex; 142 } 143 144 static rtnl_doit_func rtnl_get_doit(int protocol, int msgindex) 145 { 146 struct rtnl_link *tab; 147 148 if (protocol <= RTNL_FAMILY_MAX) 149 tab = rtnl_msg_handlers[protocol]; 150 else 151 tab = NULL; 152 153 if (tab == NULL || tab[msgindex].doit == NULL) 154 tab = rtnl_msg_handlers[PF_UNSPEC]; 155 156 return tab[msgindex].doit; 157 } 158 159 static rtnl_dumpit_func rtnl_get_dumpit(int protocol, int msgindex) 160 { 161 struct rtnl_link *tab; 162 163 if (protocol <= RTNL_FAMILY_MAX) 164 tab = rtnl_msg_handlers[protocol]; 165 else 166 tab = NULL; 167 168 if (tab == NULL || tab[msgindex].dumpit == NULL) 169 tab = rtnl_msg_handlers[PF_UNSPEC]; 170 171 return tab[msgindex].dumpit; 172 } 173 174 static rtnl_calcit_func rtnl_get_calcit(int protocol, int msgindex) 175 { 176 struct rtnl_link *tab; 177 178 if (protocol <= RTNL_FAMILY_MAX) 179 tab = rtnl_msg_handlers[protocol]; 180 else 181 tab = NULL; 182 183 if (tab == NULL || tab[msgindex].calcit == NULL) 184 tab = rtnl_msg_handlers[PF_UNSPEC]; 185 186 return tab[msgindex].calcit; 187 } 188 189 /** 190 * __rtnl_register - Register a rtnetlink message type 191 * @protocol: Protocol family or PF_UNSPEC 192 * @msgtype: rtnetlink message type 193 * @doit: Function pointer called for each request message 194 * @dumpit: Function pointer called for each dump request (NLM_F_DUMP) message 195 * @calcit: Function pointer to calc size of dump message 196 * 197 * Registers the specified function pointers (at least one of them has 198 * to be non-NULL) to be called whenever a request message for the 199 * specified protocol family and message type is received. 200 * 201 * The special protocol family PF_UNSPEC may be used to define fallback 202 * function pointers for the case when no entry for the specific protocol 203 * family exists. 204 * 205 * Returns 0 on success or a negative error code. 206 */ 207 int __rtnl_register(int protocol, int msgtype, 208 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 209 rtnl_calcit_func calcit) 210 { 211 struct rtnl_link *tab; 212 int msgindex; 213 214 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 215 msgindex = rtm_msgindex(msgtype); 216 217 tab = rtnl_msg_handlers[protocol]; 218 if (tab == NULL) { 219 tab = kcalloc(RTM_NR_MSGTYPES, sizeof(*tab), GFP_KERNEL); 220 if (tab == NULL) 221 return -ENOBUFS; 222 223 rtnl_msg_handlers[protocol] = tab; 224 } 225 226 if (doit) 227 tab[msgindex].doit = doit; 228 229 if (dumpit) 230 tab[msgindex].dumpit = dumpit; 231 232 if (calcit) 233 tab[msgindex].calcit = calcit; 234 235 return 0; 236 } 237 EXPORT_SYMBOL_GPL(__rtnl_register); 238 239 /** 240 * rtnl_register - Register a rtnetlink message type 241 * 242 * Identical to __rtnl_register() but panics on failure. This is useful 243 * as failure of this function is very unlikely, it can only happen due 244 * to lack of memory when allocating the chain to store all message 245 * handlers for a protocol. Meant for use in init functions where lack 246 * of memory implies no sense in continuing. 247 */ 248 void rtnl_register(int protocol, int msgtype, 249 rtnl_doit_func doit, rtnl_dumpit_func dumpit, 250 rtnl_calcit_func calcit) 251 { 252 if (__rtnl_register(protocol, msgtype, doit, dumpit, calcit) < 0) 253 panic("Unable to register rtnetlink message handler, " 254 "protocol = %d, message type = %d\n", 255 protocol, msgtype); 256 } 257 EXPORT_SYMBOL_GPL(rtnl_register); 258 259 /** 260 * rtnl_unregister - Unregister a rtnetlink message type 261 * @protocol: Protocol family or PF_UNSPEC 262 * @msgtype: rtnetlink message type 263 * 264 * Returns 0 on success or a negative error code. 265 */ 266 int rtnl_unregister(int protocol, int msgtype) 267 { 268 int msgindex; 269 270 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 271 msgindex = rtm_msgindex(msgtype); 272 273 if (rtnl_msg_handlers[protocol] == NULL) 274 return -ENOENT; 275 276 rtnl_msg_handlers[protocol][msgindex].doit = NULL; 277 rtnl_msg_handlers[protocol][msgindex].dumpit = NULL; 278 rtnl_msg_handlers[protocol][msgindex].calcit = NULL; 279 280 return 0; 281 } 282 EXPORT_SYMBOL_GPL(rtnl_unregister); 283 284 /** 285 * rtnl_unregister_all - Unregister all rtnetlink message type of a protocol 286 * @protocol : Protocol family or PF_UNSPEC 287 * 288 * Identical to calling rtnl_unregster() for all registered message types 289 * of a certain protocol family. 290 */ 291 void rtnl_unregister_all(int protocol) 292 { 293 BUG_ON(protocol < 0 || protocol > RTNL_FAMILY_MAX); 294 295 kfree(rtnl_msg_handlers[protocol]); 296 rtnl_msg_handlers[protocol] = NULL; 297 } 298 EXPORT_SYMBOL_GPL(rtnl_unregister_all); 299 300 static LIST_HEAD(link_ops); 301 302 static const struct rtnl_link_ops *rtnl_link_ops_get(const char *kind) 303 { 304 const struct rtnl_link_ops *ops; 305 306 list_for_each_entry(ops, &link_ops, list) { 307 if (!strcmp(ops->kind, kind)) 308 return ops; 309 } 310 return NULL; 311 } 312 313 /** 314 * __rtnl_link_register - Register rtnl_link_ops with rtnetlink. 315 * @ops: struct rtnl_link_ops * to register 316 * 317 * The caller must hold the rtnl_mutex. This function should be used 318 * by drivers that create devices during module initialization. It 319 * must be called before registering the devices. 320 * 321 * Returns 0 on success or a negative error code. 322 */ 323 int __rtnl_link_register(struct rtnl_link_ops *ops) 324 { 325 if (rtnl_link_ops_get(ops->kind)) 326 return -EEXIST; 327 328 /* The check for setup is here because if ops 329 * does not have that filled up, it is not possible 330 * to use the ops for creating device. So do not 331 * fill up dellink as well. That disables rtnl_dellink. 332 */ 333 if (ops->setup && !ops->dellink) 334 ops->dellink = unregister_netdevice_queue; 335 336 list_add_tail(&ops->list, &link_ops); 337 return 0; 338 } 339 EXPORT_SYMBOL_GPL(__rtnl_link_register); 340 341 /** 342 * rtnl_link_register - Register rtnl_link_ops with rtnetlink. 343 * @ops: struct rtnl_link_ops * to register 344 * 345 * Returns 0 on success or a negative error code. 346 */ 347 int rtnl_link_register(struct rtnl_link_ops *ops) 348 { 349 int err; 350 351 rtnl_lock(); 352 err = __rtnl_link_register(ops); 353 rtnl_unlock(); 354 return err; 355 } 356 EXPORT_SYMBOL_GPL(rtnl_link_register); 357 358 static void __rtnl_kill_links(struct net *net, struct rtnl_link_ops *ops) 359 { 360 struct net_device *dev; 361 LIST_HEAD(list_kill); 362 363 for_each_netdev(net, dev) { 364 if (dev->rtnl_link_ops == ops) 365 ops->dellink(dev, &list_kill); 366 } 367 unregister_netdevice_many(&list_kill); 368 } 369 370 /** 371 * __rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 372 * @ops: struct rtnl_link_ops * to unregister 373 * 374 * The caller must hold the rtnl_mutex. 375 */ 376 void __rtnl_link_unregister(struct rtnl_link_ops *ops) 377 { 378 struct net *net; 379 380 for_each_net(net) { 381 __rtnl_kill_links(net, ops); 382 } 383 list_del(&ops->list); 384 } 385 EXPORT_SYMBOL_GPL(__rtnl_link_unregister); 386 387 /* Return with the rtnl_lock held when there are no network 388 * devices unregistering in any network namespace. 389 */ 390 static void rtnl_lock_unregistering_all(void) 391 { 392 struct net *net; 393 bool unregistering; 394 DEFINE_WAIT_FUNC(wait, woken_wake_function); 395 396 add_wait_queue(&netdev_unregistering_wq, &wait); 397 for (;;) { 398 unregistering = false; 399 rtnl_lock(); 400 for_each_net(net) { 401 if (net->dev_unreg_count > 0) { 402 unregistering = true; 403 break; 404 } 405 } 406 if (!unregistering) 407 break; 408 __rtnl_unlock(); 409 410 wait_woken(&wait, TASK_UNINTERRUPTIBLE, MAX_SCHEDULE_TIMEOUT); 411 } 412 remove_wait_queue(&netdev_unregistering_wq, &wait); 413 } 414 415 /** 416 * rtnl_link_unregister - Unregister rtnl_link_ops from rtnetlink. 417 * @ops: struct rtnl_link_ops * to unregister 418 */ 419 void rtnl_link_unregister(struct rtnl_link_ops *ops) 420 { 421 /* Close the race with cleanup_net() */ 422 mutex_lock(&net_mutex); 423 rtnl_lock_unregistering_all(); 424 __rtnl_link_unregister(ops); 425 rtnl_unlock(); 426 mutex_unlock(&net_mutex); 427 } 428 EXPORT_SYMBOL_GPL(rtnl_link_unregister); 429 430 static size_t rtnl_link_get_slave_info_data_size(const struct net_device *dev) 431 { 432 struct net_device *master_dev; 433 const struct rtnl_link_ops *ops; 434 435 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 436 if (!master_dev) 437 return 0; 438 ops = master_dev->rtnl_link_ops; 439 if (!ops || !ops->get_slave_size) 440 return 0; 441 /* IFLA_INFO_SLAVE_DATA + nested data */ 442 return nla_total_size(sizeof(struct nlattr)) + 443 ops->get_slave_size(master_dev, dev); 444 } 445 446 static size_t rtnl_link_get_size(const struct net_device *dev) 447 { 448 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 449 size_t size; 450 451 if (!ops) 452 return 0; 453 454 size = nla_total_size(sizeof(struct nlattr)) + /* IFLA_LINKINFO */ 455 nla_total_size(strlen(ops->kind) + 1); /* IFLA_INFO_KIND */ 456 457 if (ops->get_size) 458 /* IFLA_INFO_DATA + nested data */ 459 size += nla_total_size(sizeof(struct nlattr)) + 460 ops->get_size(dev); 461 462 if (ops->get_xstats_size) 463 /* IFLA_INFO_XSTATS */ 464 size += nla_total_size(ops->get_xstats_size(dev)); 465 466 size += rtnl_link_get_slave_info_data_size(dev); 467 468 return size; 469 } 470 471 static LIST_HEAD(rtnl_af_ops); 472 473 static const struct rtnl_af_ops *rtnl_af_lookup(const int family) 474 { 475 const struct rtnl_af_ops *ops; 476 477 list_for_each_entry(ops, &rtnl_af_ops, list) { 478 if (ops->family == family) 479 return ops; 480 } 481 482 return NULL; 483 } 484 485 /** 486 * rtnl_af_register - Register rtnl_af_ops with rtnetlink. 487 * @ops: struct rtnl_af_ops * to register 488 * 489 * Returns 0 on success or a negative error code. 490 */ 491 void rtnl_af_register(struct rtnl_af_ops *ops) 492 { 493 rtnl_lock(); 494 list_add_tail(&ops->list, &rtnl_af_ops); 495 rtnl_unlock(); 496 } 497 EXPORT_SYMBOL_GPL(rtnl_af_register); 498 499 /** 500 * __rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 501 * @ops: struct rtnl_af_ops * to unregister 502 * 503 * The caller must hold the rtnl_mutex. 504 */ 505 void __rtnl_af_unregister(struct rtnl_af_ops *ops) 506 { 507 list_del(&ops->list); 508 } 509 EXPORT_SYMBOL_GPL(__rtnl_af_unregister); 510 511 /** 512 * rtnl_af_unregister - Unregister rtnl_af_ops from rtnetlink. 513 * @ops: struct rtnl_af_ops * to unregister 514 */ 515 void rtnl_af_unregister(struct rtnl_af_ops *ops) 516 { 517 rtnl_lock(); 518 __rtnl_af_unregister(ops); 519 rtnl_unlock(); 520 } 521 EXPORT_SYMBOL_GPL(rtnl_af_unregister); 522 523 static size_t rtnl_link_get_af_size(const struct net_device *dev, 524 u32 ext_filter_mask) 525 { 526 struct rtnl_af_ops *af_ops; 527 size_t size; 528 529 /* IFLA_AF_SPEC */ 530 size = nla_total_size(sizeof(struct nlattr)); 531 532 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 533 if (af_ops->get_link_af_size) { 534 /* AF_* + nested data */ 535 size += nla_total_size(sizeof(struct nlattr)) + 536 af_ops->get_link_af_size(dev, ext_filter_mask); 537 } 538 } 539 540 return size; 541 } 542 543 static bool rtnl_have_link_slave_info(const struct net_device *dev) 544 { 545 struct net_device *master_dev; 546 547 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 548 if (master_dev && master_dev->rtnl_link_ops) 549 return true; 550 return false; 551 } 552 553 static int rtnl_link_slave_info_fill(struct sk_buff *skb, 554 const struct net_device *dev) 555 { 556 struct net_device *master_dev; 557 const struct rtnl_link_ops *ops; 558 struct nlattr *slave_data; 559 int err; 560 561 master_dev = netdev_master_upper_dev_get((struct net_device *) dev); 562 if (!master_dev) 563 return 0; 564 ops = master_dev->rtnl_link_ops; 565 if (!ops) 566 return 0; 567 if (nla_put_string(skb, IFLA_INFO_SLAVE_KIND, ops->kind) < 0) 568 return -EMSGSIZE; 569 if (ops->fill_slave_info) { 570 slave_data = nla_nest_start(skb, IFLA_INFO_SLAVE_DATA); 571 if (!slave_data) 572 return -EMSGSIZE; 573 err = ops->fill_slave_info(skb, master_dev, dev); 574 if (err < 0) 575 goto err_cancel_slave_data; 576 nla_nest_end(skb, slave_data); 577 } 578 return 0; 579 580 err_cancel_slave_data: 581 nla_nest_cancel(skb, slave_data); 582 return err; 583 } 584 585 static int rtnl_link_info_fill(struct sk_buff *skb, 586 const struct net_device *dev) 587 { 588 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 589 struct nlattr *data; 590 int err; 591 592 if (!ops) 593 return 0; 594 if (nla_put_string(skb, IFLA_INFO_KIND, ops->kind) < 0) 595 return -EMSGSIZE; 596 if (ops->fill_xstats) { 597 err = ops->fill_xstats(skb, dev); 598 if (err < 0) 599 return err; 600 } 601 if (ops->fill_info) { 602 data = nla_nest_start(skb, IFLA_INFO_DATA); 603 if (data == NULL) 604 return -EMSGSIZE; 605 err = ops->fill_info(skb, dev); 606 if (err < 0) 607 goto err_cancel_data; 608 nla_nest_end(skb, data); 609 } 610 return 0; 611 612 err_cancel_data: 613 nla_nest_cancel(skb, data); 614 return err; 615 } 616 617 static int rtnl_link_fill(struct sk_buff *skb, const struct net_device *dev) 618 { 619 struct nlattr *linkinfo; 620 int err = -EMSGSIZE; 621 622 linkinfo = nla_nest_start(skb, IFLA_LINKINFO); 623 if (linkinfo == NULL) 624 goto out; 625 626 err = rtnl_link_info_fill(skb, dev); 627 if (err < 0) 628 goto err_cancel_link; 629 630 err = rtnl_link_slave_info_fill(skb, dev); 631 if (err < 0) 632 goto err_cancel_link; 633 634 nla_nest_end(skb, linkinfo); 635 return 0; 636 637 err_cancel_link: 638 nla_nest_cancel(skb, linkinfo); 639 out: 640 return err; 641 } 642 643 int rtnetlink_send(struct sk_buff *skb, struct net *net, u32 pid, unsigned int group, int echo) 644 { 645 struct sock *rtnl = net->rtnl; 646 int err = 0; 647 648 NETLINK_CB(skb).dst_group = group; 649 if (echo) 650 atomic_inc(&skb->users); 651 netlink_broadcast(rtnl, skb, pid, group, GFP_KERNEL); 652 if (echo) 653 err = netlink_unicast(rtnl, skb, pid, MSG_DONTWAIT); 654 return err; 655 } 656 657 int rtnl_unicast(struct sk_buff *skb, struct net *net, u32 pid) 658 { 659 struct sock *rtnl = net->rtnl; 660 661 return nlmsg_unicast(rtnl, skb, pid); 662 } 663 EXPORT_SYMBOL(rtnl_unicast); 664 665 void rtnl_notify(struct sk_buff *skb, struct net *net, u32 pid, u32 group, 666 struct nlmsghdr *nlh, gfp_t flags) 667 { 668 struct sock *rtnl = net->rtnl; 669 int report = 0; 670 671 if (nlh) 672 report = nlmsg_report(nlh); 673 674 nlmsg_notify(rtnl, skb, pid, group, report, flags); 675 } 676 EXPORT_SYMBOL(rtnl_notify); 677 678 void rtnl_set_sk_err(struct net *net, u32 group, int error) 679 { 680 struct sock *rtnl = net->rtnl; 681 682 netlink_set_err(rtnl, 0, group, error); 683 } 684 EXPORT_SYMBOL(rtnl_set_sk_err); 685 686 int rtnetlink_put_metrics(struct sk_buff *skb, u32 *metrics) 687 { 688 struct nlattr *mx; 689 int i, valid = 0; 690 691 mx = nla_nest_start(skb, RTA_METRICS); 692 if (mx == NULL) 693 return -ENOBUFS; 694 695 for (i = 0; i < RTAX_MAX; i++) { 696 if (metrics[i]) { 697 if (i == RTAX_CC_ALGO - 1) { 698 char tmp[TCP_CA_NAME_MAX], *name; 699 700 name = tcp_ca_get_name_by_key(metrics[i], tmp); 701 if (!name) 702 continue; 703 if (nla_put_string(skb, i + 1, name)) 704 goto nla_put_failure; 705 } else if (i == RTAX_FEATURES - 1) { 706 u32 user_features = metrics[i] & RTAX_FEATURE_MASK; 707 708 if (!user_features) 709 continue; 710 BUILD_BUG_ON(RTAX_FEATURE_MASK & DST_FEATURE_MASK); 711 if (nla_put_u32(skb, i + 1, user_features)) 712 goto nla_put_failure; 713 } else { 714 if (nla_put_u32(skb, i + 1, metrics[i])) 715 goto nla_put_failure; 716 } 717 valid++; 718 } 719 } 720 721 if (!valid) { 722 nla_nest_cancel(skb, mx); 723 return 0; 724 } 725 726 return nla_nest_end(skb, mx); 727 728 nla_put_failure: 729 nla_nest_cancel(skb, mx); 730 return -EMSGSIZE; 731 } 732 EXPORT_SYMBOL(rtnetlink_put_metrics); 733 734 int rtnl_put_cacheinfo(struct sk_buff *skb, struct dst_entry *dst, u32 id, 735 long expires, u32 error) 736 { 737 struct rta_cacheinfo ci = { 738 .rta_lastuse = jiffies_delta_to_clock_t(jiffies - dst->lastuse), 739 .rta_used = dst->__use, 740 .rta_clntref = atomic_read(&(dst->__refcnt)), 741 .rta_error = error, 742 .rta_id = id, 743 }; 744 745 if (expires) { 746 unsigned long clock; 747 748 clock = jiffies_to_clock_t(abs(expires)); 749 clock = min_t(unsigned long, clock, INT_MAX); 750 ci.rta_expires = (expires > 0) ? clock : -clock; 751 } 752 return nla_put(skb, RTA_CACHEINFO, sizeof(ci), &ci); 753 } 754 EXPORT_SYMBOL_GPL(rtnl_put_cacheinfo); 755 756 static void set_operstate(struct net_device *dev, unsigned char transition) 757 { 758 unsigned char operstate = dev->operstate; 759 760 switch (transition) { 761 case IF_OPER_UP: 762 if ((operstate == IF_OPER_DORMANT || 763 operstate == IF_OPER_UNKNOWN) && 764 !netif_dormant(dev)) 765 operstate = IF_OPER_UP; 766 break; 767 768 case IF_OPER_DORMANT: 769 if (operstate == IF_OPER_UP || 770 operstate == IF_OPER_UNKNOWN) 771 operstate = IF_OPER_DORMANT; 772 break; 773 } 774 775 if (dev->operstate != operstate) { 776 write_lock_bh(&dev_base_lock); 777 dev->operstate = operstate; 778 write_unlock_bh(&dev_base_lock); 779 netdev_state_change(dev); 780 } 781 } 782 783 static unsigned int rtnl_dev_get_flags(const struct net_device *dev) 784 { 785 return (dev->flags & ~(IFF_PROMISC | IFF_ALLMULTI)) | 786 (dev->gflags & (IFF_PROMISC | IFF_ALLMULTI)); 787 } 788 789 static unsigned int rtnl_dev_combine_flags(const struct net_device *dev, 790 const struct ifinfomsg *ifm) 791 { 792 unsigned int flags = ifm->ifi_flags; 793 794 /* bugwards compatibility: ifi_change == 0 is treated as ~0 */ 795 if (ifm->ifi_change) 796 flags = (flags & ifm->ifi_change) | 797 (rtnl_dev_get_flags(dev) & ~ifm->ifi_change); 798 799 return flags; 800 } 801 802 static void copy_rtnl_link_stats(struct rtnl_link_stats *a, 803 const struct rtnl_link_stats64 *b) 804 { 805 a->rx_packets = b->rx_packets; 806 a->tx_packets = b->tx_packets; 807 a->rx_bytes = b->rx_bytes; 808 a->tx_bytes = b->tx_bytes; 809 a->rx_errors = b->rx_errors; 810 a->tx_errors = b->tx_errors; 811 a->rx_dropped = b->rx_dropped; 812 a->tx_dropped = b->tx_dropped; 813 814 a->multicast = b->multicast; 815 a->collisions = b->collisions; 816 817 a->rx_length_errors = b->rx_length_errors; 818 a->rx_over_errors = b->rx_over_errors; 819 a->rx_crc_errors = b->rx_crc_errors; 820 a->rx_frame_errors = b->rx_frame_errors; 821 a->rx_fifo_errors = b->rx_fifo_errors; 822 a->rx_missed_errors = b->rx_missed_errors; 823 824 a->tx_aborted_errors = b->tx_aborted_errors; 825 a->tx_carrier_errors = b->tx_carrier_errors; 826 a->tx_fifo_errors = b->tx_fifo_errors; 827 a->tx_heartbeat_errors = b->tx_heartbeat_errors; 828 a->tx_window_errors = b->tx_window_errors; 829 830 a->rx_compressed = b->rx_compressed; 831 a->tx_compressed = b->tx_compressed; 832 833 a->rx_nohandler = b->rx_nohandler; 834 } 835 836 /* All VF info */ 837 static inline int rtnl_vfinfo_size(const struct net_device *dev, 838 u32 ext_filter_mask) 839 { 840 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF)) { 841 int num_vfs = dev_num_vf(dev->dev.parent); 842 size_t size = nla_total_size(0); 843 size += num_vfs * 844 (nla_total_size(0) + 845 nla_total_size(sizeof(struct ifla_vf_mac)) + 846 nla_total_size(sizeof(struct ifla_vf_vlan)) + 847 nla_total_size(0) + /* nest IFLA_VF_VLAN_LIST */ 848 nla_total_size(MAX_VLAN_LIST_LEN * 849 sizeof(struct ifla_vf_vlan_info)) + 850 nla_total_size(sizeof(struct ifla_vf_spoofchk)) + 851 nla_total_size(sizeof(struct ifla_vf_tx_rate)) + 852 nla_total_size(sizeof(struct ifla_vf_rate)) + 853 nla_total_size(sizeof(struct ifla_vf_link_state)) + 854 nla_total_size(sizeof(struct ifla_vf_rss_query_en)) + 855 nla_total_size(0) + /* nest IFLA_VF_STATS */ 856 /* IFLA_VF_STATS_RX_PACKETS */ 857 nla_total_size_64bit(sizeof(__u64)) + 858 /* IFLA_VF_STATS_TX_PACKETS */ 859 nla_total_size_64bit(sizeof(__u64)) + 860 /* IFLA_VF_STATS_RX_BYTES */ 861 nla_total_size_64bit(sizeof(__u64)) + 862 /* IFLA_VF_STATS_TX_BYTES */ 863 nla_total_size_64bit(sizeof(__u64)) + 864 /* IFLA_VF_STATS_BROADCAST */ 865 nla_total_size_64bit(sizeof(__u64)) + 866 /* IFLA_VF_STATS_MULTICAST */ 867 nla_total_size_64bit(sizeof(__u64)) + 868 nla_total_size(sizeof(struct ifla_vf_trust))); 869 return size; 870 } else 871 return 0; 872 } 873 874 static size_t rtnl_port_size(const struct net_device *dev, 875 u32 ext_filter_mask) 876 { 877 size_t port_size = nla_total_size(4) /* PORT_VF */ 878 + nla_total_size(PORT_PROFILE_MAX) /* PORT_PROFILE */ 879 + nla_total_size(PORT_UUID_MAX) /* PORT_INSTANCE_UUID */ 880 + nla_total_size(PORT_UUID_MAX) /* PORT_HOST_UUID */ 881 + nla_total_size(1) /* PROT_VDP_REQUEST */ 882 + nla_total_size(2); /* PORT_VDP_RESPONSE */ 883 size_t vf_ports_size = nla_total_size(sizeof(struct nlattr)); 884 size_t vf_port_size = nla_total_size(sizeof(struct nlattr)) 885 + port_size; 886 size_t port_self_size = nla_total_size(sizeof(struct nlattr)) 887 + port_size; 888 889 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 890 !(ext_filter_mask & RTEXT_FILTER_VF)) 891 return 0; 892 if (dev_num_vf(dev->dev.parent)) 893 return port_self_size + vf_ports_size + 894 vf_port_size * dev_num_vf(dev->dev.parent); 895 else 896 return port_self_size; 897 } 898 899 static size_t rtnl_xdp_size(const struct net_device *dev) 900 { 901 size_t xdp_size = nla_total_size(0) + /* nest IFLA_XDP */ 902 nla_total_size(1); /* XDP_ATTACHED */ 903 904 if (!dev->netdev_ops->ndo_xdp) 905 return 0; 906 else 907 return xdp_size; 908 } 909 910 static noinline size_t if_nlmsg_size(const struct net_device *dev, 911 u32 ext_filter_mask) 912 { 913 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 914 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 915 + nla_total_size(IFALIASZ) /* IFLA_IFALIAS */ 916 + nla_total_size(IFNAMSIZ) /* IFLA_QDISC */ 917 + nla_total_size_64bit(sizeof(struct rtnl_link_ifmap)) 918 + nla_total_size(sizeof(struct rtnl_link_stats)) 919 + nla_total_size_64bit(sizeof(struct rtnl_link_stats64)) 920 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 921 + nla_total_size(MAX_ADDR_LEN) /* IFLA_BROADCAST */ 922 + nla_total_size(4) /* IFLA_TXQLEN */ 923 + nla_total_size(4) /* IFLA_WEIGHT */ 924 + nla_total_size(4) /* IFLA_MTU */ 925 + nla_total_size(4) /* IFLA_LINK */ 926 + nla_total_size(4) /* IFLA_MASTER */ 927 + nla_total_size(1) /* IFLA_CARRIER */ 928 + nla_total_size(4) /* IFLA_PROMISCUITY */ 929 + nla_total_size(4) /* IFLA_NUM_TX_QUEUES */ 930 + nla_total_size(4) /* IFLA_NUM_RX_QUEUES */ 931 + nla_total_size(4) /* IFLA_GSO_MAX_SEGS */ 932 + nla_total_size(4) /* IFLA_GSO_MAX_SIZE */ 933 + nla_total_size(1) /* IFLA_OPERSTATE */ 934 + nla_total_size(1) /* IFLA_LINKMODE */ 935 + nla_total_size(4) /* IFLA_CARRIER_CHANGES */ 936 + nla_total_size(4) /* IFLA_LINK_NETNSID */ 937 + nla_total_size(ext_filter_mask 938 & RTEXT_FILTER_VF ? 4 : 0) /* IFLA_NUM_VF */ 939 + rtnl_vfinfo_size(dev, ext_filter_mask) /* IFLA_VFINFO_LIST */ 940 + rtnl_port_size(dev, ext_filter_mask) /* IFLA_VF_PORTS + IFLA_PORT_SELF */ 941 + rtnl_link_get_size(dev) /* IFLA_LINKINFO */ 942 + rtnl_link_get_af_size(dev, ext_filter_mask) /* IFLA_AF_SPEC */ 943 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_PORT_ID */ 944 + nla_total_size(MAX_PHYS_ITEM_ID_LEN) /* IFLA_PHYS_SWITCH_ID */ 945 + nla_total_size(IFNAMSIZ) /* IFLA_PHYS_PORT_NAME */ 946 + rtnl_xdp_size(dev) /* IFLA_XDP */ 947 + nla_total_size(1); /* IFLA_PROTO_DOWN */ 948 949 } 950 951 static int rtnl_vf_ports_fill(struct sk_buff *skb, struct net_device *dev) 952 { 953 struct nlattr *vf_ports; 954 struct nlattr *vf_port; 955 int vf; 956 int err; 957 958 vf_ports = nla_nest_start(skb, IFLA_VF_PORTS); 959 if (!vf_ports) 960 return -EMSGSIZE; 961 962 for (vf = 0; vf < dev_num_vf(dev->dev.parent); vf++) { 963 vf_port = nla_nest_start(skb, IFLA_VF_PORT); 964 if (!vf_port) 965 goto nla_put_failure; 966 if (nla_put_u32(skb, IFLA_PORT_VF, vf)) 967 goto nla_put_failure; 968 err = dev->netdev_ops->ndo_get_vf_port(dev, vf, skb); 969 if (err == -EMSGSIZE) 970 goto nla_put_failure; 971 if (err) { 972 nla_nest_cancel(skb, vf_port); 973 continue; 974 } 975 nla_nest_end(skb, vf_port); 976 } 977 978 nla_nest_end(skb, vf_ports); 979 980 return 0; 981 982 nla_put_failure: 983 nla_nest_cancel(skb, vf_ports); 984 return -EMSGSIZE; 985 } 986 987 static int rtnl_port_self_fill(struct sk_buff *skb, struct net_device *dev) 988 { 989 struct nlattr *port_self; 990 int err; 991 992 port_self = nla_nest_start(skb, IFLA_PORT_SELF); 993 if (!port_self) 994 return -EMSGSIZE; 995 996 err = dev->netdev_ops->ndo_get_vf_port(dev, PORT_SELF_VF, skb); 997 if (err) { 998 nla_nest_cancel(skb, port_self); 999 return (err == -EMSGSIZE) ? err : 0; 1000 } 1001 1002 nla_nest_end(skb, port_self); 1003 1004 return 0; 1005 } 1006 1007 static int rtnl_port_fill(struct sk_buff *skb, struct net_device *dev, 1008 u32 ext_filter_mask) 1009 { 1010 int err; 1011 1012 if (!dev->netdev_ops->ndo_get_vf_port || !dev->dev.parent || 1013 !(ext_filter_mask & RTEXT_FILTER_VF)) 1014 return 0; 1015 1016 err = rtnl_port_self_fill(skb, dev); 1017 if (err) 1018 return err; 1019 1020 if (dev_num_vf(dev->dev.parent)) { 1021 err = rtnl_vf_ports_fill(skb, dev); 1022 if (err) 1023 return err; 1024 } 1025 1026 return 0; 1027 } 1028 1029 static int rtnl_phys_port_id_fill(struct sk_buff *skb, struct net_device *dev) 1030 { 1031 int err; 1032 struct netdev_phys_item_id ppid; 1033 1034 err = dev_get_phys_port_id(dev, &ppid); 1035 if (err) { 1036 if (err == -EOPNOTSUPP) 1037 return 0; 1038 return err; 1039 } 1040 1041 if (nla_put(skb, IFLA_PHYS_PORT_ID, ppid.id_len, ppid.id)) 1042 return -EMSGSIZE; 1043 1044 return 0; 1045 } 1046 1047 static int rtnl_phys_port_name_fill(struct sk_buff *skb, struct net_device *dev) 1048 { 1049 char name[IFNAMSIZ]; 1050 int err; 1051 1052 err = dev_get_phys_port_name(dev, name, sizeof(name)); 1053 if (err) { 1054 if (err == -EOPNOTSUPP) 1055 return 0; 1056 return err; 1057 } 1058 1059 if (nla_put(skb, IFLA_PHYS_PORT_NAME, strlen(name), name)) 1060 return -EMSGSIZE; 1061 1062 return 0; 1063 } 1064 1065 static int rtnl_phys_switch_id_fill(struct sk_buff *skb, struct net_device *dev) 1066 { 1067 int err; 1068 struct switchdev_attr attr = { 1069 .orig_dev = dev, 1070 .id = SWITCHDEV_ATTR_ID_PORT_PARENT_ID, 1071 .flags = SWITCHDEV_F_NO_RECURSE, 1072 }; 1073 1074 err = switchdev_port_attr_get(dev, &attr); 1075 if (err) { 1076 if (err == -EOPNOTSUPP) 1077 return 0; 1078 return err; 1079 } 1080 1081 if (nla_put(skb, IFLA_PHYS_SWITCH_ID, attr.u.ppid.id_len, 1082 attr.u.ppid.id)) 1083 return -EMSGSIZE; 1084 1085 return 0; 1086 } 1087 1088 static noinline_for_stack int rtnl_fill_stats(struct sk_buff *skb, 1089 struct net_device *dev) 1090 { 1091 struct rtnl_link_stats64 *sp; 1092 struct nlattr *attr; 1093 1094 attr = nla_reserve_64bit(skb, IFLA_STATS64, 1095 sizeof(struct rtnl_link_stats64), IFLA_PAD); 1096 if (!attr) 1097 return -EMSGSIZE; 1098 1099 sp = nla_data(attr); 1100 dev_get_stats(dev, sp); 1101 1102 attr = nla_reserve(skb, IFLA_STATS, 1103 sizeof(struct rtnl_link_stats)); 1104 if (!attr) 1105 return -EMSGSIZE; 1106 1107 copy_rtnl_link_stats(nla_data(attr), sp); 1108 1109 return 0; 1110 } 1111 1112 static noinline_for_stack int rtnl_fill_vfinfo(struct sk_buff *skb, 1113 struct net_device *dev, 1114 int vfs_num, 1115 struct nlattr *vfinfo) 1116 { 1117 struct ifla_vf_rss_query_en vf_rss_query_en; 1118 struct nlattr *vf, *vfstats, *vfvlanlist; 1119 struct ifla_vf_link_state vf_linkstate; 1120 struct ifla_vf_vlan_info vf_vlan_info; 1121 struct ifla_vf_spoofchk vf_spoofchk; 1122 struct ifla_vf_tx_rate vf_tx_rate; 1123 struct ifla_vf_stats vf_stats; 1124 struct ifla_vf_trust vf_trust; 1125 struct ifla_vf_vlan vf_vlan; 1126 struct ifla_vf_rate vf_rate; 1127 struct ifla_vf_mac vf_mac; 1128 struct ifla_vf_info ivi; 1129 1130 /* Not all SR-IOV capable drivers support the 1131 * spoofcheck and "RSS query enable" query. Preset to 1132 * -1 so the user space tool can detect that the driver 1133 * didn't report anything. 1134 */ 1135 ivi.spoofchk = -1; 1136 ivi.rss_query_en = -1; 1137 ivi.trusted = -1; 1138 memset(ivi.mac, 0, sizeof(ivi.mac)); 1139 /* The default value for VF link state is "auto" 1140 * IFLA_VF_LINK_STATE_AUTO which equals zero 1141 */ 1142 ivi.linkstate = 0; 1143 /* VLAN Protocol by default is 802.1Q */ 1144 ivi.vlan_proto = htons(ETH_P_8021Q); 1145 if (dev->netdev_ops->ndo_get_vf_config(dev, vfs_num, &ivi)) 1146 return 0; 1147 1148 memset(&vf_vlan_info, 0, sizeof(vf_vlan_info)); 1149 1150 vf_mac.vf = 1151 vf_vlan.vf = 1152 vf_vlan_info.vf = 1153 vf_rate.vf = 1154 vf_tx_rate.vf = 1155 vf_spoofchk.vf = 1156 vf_linkstate.vf = 1157 vf_rss_query_en.vf = 1158 vf_trust.vf = ivi.vf; 1159 1160 memcpy(vf_mac.mac, ivi.mac, sizeof(ivi.mac)); 1161 vf_vlan.vlan = ivi.vlan; 1162 vf_vlan.qos = ivi.qos; 1163 vf_vlan_info.vlan = ivi.vlan; 1164 vf_vlan_info.qos = ivi.qos; 1165 vf_vlan_info.vlan_proto = ivi.vlan_proto; 1166 vf_tx_rate.rate = ivi.max_tx_rate; 1167 vf_rate.min_tx_rate = ivi.min_tx_rate; 1168 vf_rate.max_tx_rate = ivi.max_tx_rate; 1169 vf_spoofchk.setting = ivi.spoofchk; 1170 vf_linkstate.link_state = ivi.linkstate; 1171 vf_rss_query_en.setting = ivi.rss_query_en; 1172 vf_trust.setting = ivi.trusted; 1173 vf = nla_nest_start(skb, IFLA_VF_INFO); 1174 if (!vf) 1175 goto nla_put_vfinfo_failure; 1176 if (nla_put(skb, IFLA_VF_MAC, sizeof(vf_mac), &vf_mac) || 1177 nla_put(skb, IFLA_VF_VLAN, sizeof(vf_vlan), &vf_vlan) || 1178 nla_put(skb, IFLA_VF_RATE, sizeof(vf_rate), 1179 &vf_rate) || 1180 nla_put(skb, IFLA_VF_TX_RATE, sizeof(vf_tx_rate), 1181 &vf_tx_rate) || 1182 nla_put(skb, IFLA_VF_SPOOFCHK, sizeof(vf_spoofchk), 1183 &vf_spoofchk) || 1184 nla_put(skb, IFLA_VF_LINK_STATE, sizeof(vf_linkstate), 1185 &vf_linkstate) || 1186 nla_put(skb, IFLA_VF_RSS_QUERY_EN, 1187 sizeof(vf_rss_query_en), 1188 &vf_rss_query_en) || 1189 nla_put(skb, IFLA_VF_TRUST, 1190 sizeof(vf_trust), &vf_trust)) 1191 goto nla_put_vf_failure; 1192 vfvlanlist = nla_nest_start(skb, IFLA_VF_VLAN_LIST); 1193 if (!vfvlanlist) 1194 goto nla_put_vf_failure; 1195 if (nla_put(skb, IFLA_VF_VLAN_INFO, sizeof(vf_vlan_info), 1196 &vf_vlan_info)) { 1197 nla_nest_cancel(skb, vfvlanlist); 1198 goto nla_put_vf_failure; 1199 } 1200 nla_nest_end(skb, vfvlanlist); 1201 memset(&vf_stats, 0, sizeof(vf_stats)); 1202 if (dev->netdev_ops->ndo_get_vf_stats) 1203 dev->netdev_ops->ndo_get_vf_stats(dev, vfs_num, 1204 &vf_stats); 1205 vfstats = nla_nest_start(skb, IFLA_VF_STATS); 1206 if (!vfstats) 1207 goto nla_put_vf_failure; 1208 if (nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_PACKETS, 1209 vf_stats.rx_packets, IFLA_VF_STATS_PAD) || 1210 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_PACKETS, 1211 vf_stats.tx_packets, IFLA_VF_STATS_PAD) || 1212 nla_put_u64_64bit(skb, IFLA_VF_STATS_RX_BYTES, 1213 vf_stats.rx_bytes, IFLA_VF_STATS_PAD) || 1214 nla_put_u64_64bit(skb, IFLA_VF_STATS_TX_BYTES, 1215 vf_stats.tx_bytes, IFLA_VF_STATS_PAD) || 1216 nla_put_u64_64bit(skb, IFLA_VF_STATS_BROADCAST, 1217 vf_stats.broadcast, IFLA_VF_STATS_PAD) || 1218 nla_put_u64_64bit(skb, IFLA_VF_STATS_MULTICAST, 1219 vf_stats.multicast, IFLA_VF_STATS_PAD)) { 1220 nla_nest_cancel(skb, vfstats); 1221 goto nla_put_vf_failure; 1222 } 1223 nla_nest_end(skb, vfstats); 1224 nla_nest_end(skb, vf); 1225 return 0; 1226 1227 nla_put_vf_failure: 1228 nla_nest_cancel(skb, vf); 1229 nla_put_vfinfo_failure: 1230 nla_nest_cancel(skb, vfinfo); 1231 return -EMSGSIZE; 1232 } 1233 1234 static int rtnl_fill_link_ifmap(struct sk_buff *skb, struct net_device *dev) 1235 { 1236 struct rtnl_link_ifmap map; 1237 1238 memset(&map, 0, sizeof(map)); 1239 map.mem_start = dev->mem_start; 1240 map.mem_end = dev->mem_end; 1241 map.base_addr = dev->base_addr; 1242 map.irq = dev->irq; 1243 map.dma = dev->dma; 1244 map.port = dev->if_port; 1245 1246 if (nla_put_64bit(skb, IFLA_MAP, sizeof(map), &map, IFLA_PAD)) 1247 return -EMSGSIZE; 1248 1249 return 0; 1250 } 1251 1252 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev) 1253 { 1254 struct netdev_xdp xdp_op = {}; 1255 struct nlattr *xdp; 1256 int err; 1257 1258 if (!dev->netdev_ops->ndo_xdp) 1259 return 0; 1260 xdp = nla_nest_start(skb, IFLA_XDP); 1261 if (!xdp) 1262 return -EMSGSIZE; 1263 xdp_op.command = XDP_QUERY_PROG; 1264 err = dev->netdev_ops->ndo_xdp(dev, &xdp_op); 1265 if (err) 1266 goto err_cancel; 1267 err = nla_put_u8(skb, IFLA_XDP_ATTACHED, xdp_op.prog_attached); 1268 if (err) 1269 goto err_cancel; 1270 1271 nla_nest_end(skb, xdp); 1272 return 0; 1273 1274 err_cancel: 1275 nla_nest_cancel(skb, xdp); 1276 return err; 1277 } 1278 1279 static int rtnl_fill_ifinfo(struct sk_buff *skb, struct net_device *dev, 1280 int type, u32 pid, u32 seq, u32 change, 1281 unsigned int flags, u32 ext_filter_mask) 1282 { 1283 struct ifinfomsg *ifm; 1284 struct nlmsghdr *nlh; 1285 struct nlattr *af_spec; 1286 struct rtnl_af_ops *af_ops; 1287 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1288 1289 ASSERT_RTNL(); 1290 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifm), flags); 1291 if (nlh == NULL) 1292 return -EMSGSIZE; 1293 1294 ifm = nlmsg_data(nlh); 1295 ifm->ifi_family = AF_UNSPEC; 1296 ifm->__ifi_pad = 0; 1297 ifm->ifi_type = dev->type; 1298 ifm->ifi_index = dev->ifindex; 1299 ifm->ifi_flags = dev_get_flags(dev); 1300 ifm->ifi_change = change; 1301 1302 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 1303 nla_put_u32(skb, IFLA_TXQLEN, dev->tx_queue_len) || 1304 nla_put_u8(skb, IFLA_OPERSTATE, 1305 netif_running(dev) ? dev->operstate : IF_OPER_DOWN) || 1306 nla_put_u8(skb, IFLA_LINKMODE, dev->link_mode) || 1307 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 1308 nla_put_u32(skb, IFLA_GROUP, dev->group) || 1309 nla_put_u32(skb, IFLA_PROMISCUITY, dev->promiscuity) || 1310 nla_put_u32(skb, IFLA_NUM_TX_QUEUES, dev->num_tx_queues) || 1311 nla_put_u32(skb, IFLA_GSO_MAX_SEGS, dev->gso_max_segs) || 1312 nla_put_u32(skb, IFLA_GSO_MAX_SIZE, dev->gso_max_size) || 1313 #ifdef CONFIG_RPS 1314 nla_put_u32(skb, IFLA_NUM_RX_QUEUES, dev->num_rx_queues) || 1315 #endif 1316 (dev->ifindex != dev_get_iflink(dev) && 1317 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev))) || 1318 (upper_dev && 1319 nla_put_u32(skb, IFLA_MASTER, upper_dev->ifindex)) || 1320 nla_put_u8(skb, IFLA_CARRIER, netif_carrier_ok(dev)) || 1321 (dev->qdisc && 1322 nla_put_string(skb, IFLA_QDISC, dev->qdisc->ops->id)) || 1323 (dev->ifalias && 1324 nla_put_string(skb, IFLA_IFALIAS, dev->ifalias)) || 1325 nla_put_u32(skb, IFLA_CARRIER_CHANGES, 1326 atomic_read(&dev->carrier_changes)) || 1327 nla_put_u8(skb, IFLA_PROTO_DOWN, dev->proto_down)) 1328 goto nla_put_failure; 1329 1330 if (rtnl_fill_link_ifmap(skb, dev)) 1331 goto nla_put_failure; 1332 1333 if (dev->addr_len) { 1334 if (nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr) || 1335 nla_put(skb, IFLA_BROADCAST, dev->addr_len, dev->broadcast)) 1336 goto nla_put_failure; 1337 } 1338 1339 if (rtnl_phys_port_id_fill(skb, dev)) 1340 goto nla_put_failure; 1341 1342 if (rtnl_phys_port_name_fill(skb, dev)) 1343 goto nla_put_failure; 1344 1345 if (rtnl_phys_switch_id_fill(skb, dev)) 1346 goto nla_put_failure; 1347 1348 if (rtnl_fill_stats(skb, dev)) 1349 goto nla_put_failure; 1350 1351 if (dev->dev.parent && (ext_filter_mask & RTEXT_FILTER_VF) && 1352 nla_put_u32(skb, IFLA_NUM_VF, dev_num_vf(dev->dev.parent))) 1353 goto nla_put_failure; 1354 1355 if (dev->netdev_ops->ndo_get_vf_config && dev->dev.parent && 1356 ext_filter_mask & RTEXT_FILTER_VF) { 1357 int i; 1358 struct nlattr *vfinfo; 1359 int num_vfs = dev_num_vf(dev->dev.parent); 1360 1361 vfinfo = nla_nest_start(skb, IFLA_VFINFO_LIST); 1362 if (!vfinfo) 1363 goto nla_put_failure; 1364 for (i = 0; i < num_vfs; i++) { 1365 if (rtnl_fill_vfinfo(skb, dev, i, vfinfo)) 1366 goto nla_put_failure; 1367 } 1368 1369 nla_nest_end(skb, vfinfo); 1370 } 1371 1372 if (rtnl_port_fill(skb, dev, ext_filter_mask)) 1373 goto nla_put_failure; 1374 1375 if (rtnl_xdp_fill(skb, dev)) 1376 goto nla_put_failure; 1377 1378 if (dev->rtnl_link_ops || rtnl_have_link_slave_info(dev)) { 1379 if (rtnl_link_fill(skb, dev) < 0) 1380 goto nla_put_failure; 1381 } 1382 1383 if (dev->rtnl_link_ops && 1384 dev->rtnl_link_ops->get_link_net) { 1385 struct net *link_net = dev->rtnl_link_ops->get_link_net(dev); 1386 1387 if (!net_eq(dev_net(dev), link_net)) { 1388 int id = peernet2id_alloc(dev_net(dev), link_net); 1389 1390 if (nla_put_s32(skb, IFLA_LINK_NETNSID, id)) 1391 goto nla_put_failure; 1392 } 1393 } 1394 1395 if (!(af_spec = nla_nest_start(skb, IFLA_AF_SPEC))) 1396 goto nla_put_failure; 1397 1398 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 1399 if (af_ops->fill_link_af) { 1400 struct nlattr *af; 1401 int err; 1402 1403 if (!(af = nla_nest_start(skb, af_ops->family))) 1404 goto nla_put_failure; 1405 1406 err = af_ops->fill_link_af(skb, dev, ext_filter_mask); 1407 1408 /* 1409 * Caller may return ENODATA to indicate that there 1410 * was no data to be dumped. This is not an error, it 1411 * means we should trim the attribute header and 1412 * continue. 1413 */ 1414 if (err == -ENODATA) 1415 nla_nest_cancel(skb, af); 1416 else if (err < 0) 1417 goto nla_put_failure; 1418 1419 nla_nest_end(skb, af); 1420 } 1421 } 1422 1423 nla_nest_end(skb, af_spec); 1424 1425 nlmsg_end(skb, nlh); 1426 return 0; 1427 1428 nla_put_failure: 1429 nlmsg_cancel(skb, nlh); 1430 return -EMSGSIZE; 1431 } 1432 1433 static const struct nla_policy ifla_policy[IFLA_MAX+1] = { 1434 [IFLA_IFNAME] = { .type = NLA_STRING, .len = IFNAMSIZ-1 }, 1435 [IFLA_ADDRESS] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1436 [IFLA_BROADCAST] = { .type = NLA_BINARY, .len = MAX_ADDR_LEN }, 1437 [IFLA_MAP] = { .len = sizeof(struct rtnl_link_ifmap) }, 1438 [IFLA_MTU] = { .type = NLA_U32 }, 1439 [IFLA_LINK] = { .type = NLA_U32 }, 1440 [IFLA_MASTER] = { .type = NLA_U32 }, 1441 [IFLA_CARRIER] = { .type = NLA_U8 }, 1442 [IFLA_TXQLEN] = { .type = NLA_U32 }, 1443 [IFLA_WEIGHT] = { .type = NLA_U32 }, 1444 [IFLA_OPERSTATE] = { .type = NLA_U8 }, 1445 [IFLA_LINKMODE] = { .type = NLA_U8 }, 1446 [IFLA_LINKINFO] = { .type = NLA_NESTED }, 1447 [IFLA_NET_NS_PID] = { .type = NLA_U32 }, 1448 [IFLA_NET_NS_FD] = { .type = NLA_U32 }, 1449 [IFLA_IFALIAS] = { .type = NLA_STRING, .len = IFALIASZ-1 }, 1450 [IFLA_VFINFO_LIST] = {. type = NLA_NESTED }, 1451 [IFLA_VF_PORTS] = { .type = NLA_NESTED }, 1452 [IFLA_PORT_SELF] = { .type = NLA_NESTED }, 1453 [IFLA_AF_SPEC] = { .type = NLA_NESTED }, 1454 [IFLA_EXT_MASK] = { .type = NLA_U32 }, 1455 [IFLA_PROMISCUITY] = { .type = NLA_U32 }, 1456 [IFLA_NUM_TX_QUEUES] = { .type = NLA_U32 }, 1457 [IFLA_NUM_RX_QUEUES] = { .type = NLA_U32 }, 1458 [IFLA_PHYS_PORT_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1459 [IFLA_CARRIER_CHANGES] = { .type = NLA_U32 }, /* ignored */ 1460 [IFLA_PHYS_SWITCH_ID] = { .type = NLA_BINARY, .len = MAX_PHYS_ITEM_ID_LEN }, 1461 [IFLA_LINK_NETNSID] = { .type = NLA_S32 }, 1462 [IFLA_PROTO_DOWN] = { .type = NLA_U8 }, 1463 [IFLA_XDP] = { .type = NLA_NESTED }, 1464 }; 1465 1466 static const struct nla_policy ifla_info_policy[IFLA_INFO_MAX+1] = { 1467 [IFLA_INFO_KIND] = { .type = NLA_STRING }, 1468 [IFLA_INFO_DATA] = { .type = NLA_NESTED }, 1469 [IFLA_INFO_SLAVE_KIND] = { .type = NLA_STRING }, 1470 [IFLA_INFO_SLAVE_DATA] = { .type = NLA_NESTED }, 1471 }; 1472 1473 static const struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = { 1474 [IFLA_VF_MAC] = { .len = sizeof(struct ifla_vf_mac) }, 1475 [IFLA_VF_VLAN] = { .len = sizeof(struct ifla_vf_vlan) }, 1476 [IFLA_VF_VLAN_LIST] = { .type = NLA_NESTED }, 1477 [IFLA_VF_TX_RATE] = { .len = sizeof(struct ifla_vf_tx_rate) }, 1478 [IFLA_VF_SPOOFCHK] = { .len = sizeof(struct ifla_vf_spoofchk) }, 1479 [IFLA_VF_RATE] = { .len = sizeof(struct ifla_vf_rate) }, 1480 [IFLA_VF_LINK_STATE] = { .len = sizeof(struct ifla_vf_link_state) }, 1481 [IFLA_VF_RSS_QUERY_EN] = { .len = sizeof(struct ifla_vf_rss_query_en) }, 1482 [IFLA_VF_STATS] = { .type = NLA_NESTED }, 1483 [IFLA_VF_TRUST] = { .len = sizeof(struct ifla_vf_trust) }, 1484 [IFLA_VF_IB_NODE_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1485 [IFLA_VF_IB_PORT_GUID] = { .len = sizeof(struct ifla_vf_guid) }, 1486 }; 1487 1488 static const struct nla_policy ifla_port_policy[IFLA_PORT_MAX+1] = { 1489 [IFLA_PORT_VF] = { .type = NLA_U32 }, 1490 [IFLA_PORT_PROFILE] = { .type = NLA_STRING, 1491 .len = PORT_PROFILE_MAX }, 1492 [IFLA_PORT_INSTANCE_UUID] = { .type = NLA_BINARY, 1493 .len = PORT_UUID_MAX }, 1494 [IFLA_PORT_HOST_UUID] = { .type = NLA_STRING, 1495 .len = PORT_UUID_MAX }, 1496 [IFLA_PORT_REQUEST] = { .type = NLA_U8, }, 1497 [IFLA_PORT_RESPONSE] = { .type = NLA_U16, }, 1498 1499 /* Unused, but we need to keep it here since user space could 1500 * fill it. It's also broken with regard to NLA_BINARY use in 1501 * combination with structs. 1502 */ 1503 [IFLA_PORT_VSI_TYPE] = { .type = NLA_BINARY, 1504 .len = sizeof(struct ifla_port_vsi) }, 1505 }; 1506 1507 static const struct nla_policy ifla_xdp_policy[IFLA_XDP_MAX + 1] = { 1508 [IFLA_XDP_FD] = { .type = NLA_S32 }, 1509 [IFLA_XDP_ATTACHED] = { .type = NLA_U8 }, 1510 [IFLA_XDP_FLAGS] = { .type = NLA_U32 }, 1511 }; 1512 1513 static const struct rtnl_link_ops *linkinfo_to_kind_ops(const struct nlattr *nla) 1514 { 1515 const struct rtnl_link_ops *ops = NULL; 1516 struct nlattr *linfo[IFLA_INFO_MAX + 1]; 1517 1518 if (nla_parse_nested(linfo, IFLA_INFO_MAX, nla, ifla_info_policy) < 0) 1519 return NULL; 1520 1521 if (linfo[IFLA_INFO_KIND]) { 1522 char kind[MODULE_NAME_LEN]; 1523 1524 nla_strlcpy(kind, linfo[IFLA_INFO_KIND], sizeof(kind)); 1525 ops = rtnl_link_ops_get(kind); 1526 } 1527 1528 return ops; 1529 } 1530 1531 static bool link_master_filtered(struct net_device *dev, int master_idx) 1532 { 1533 struct net_device *master; 1534 1535 if (!master_idx) 1536 return false; 1537 1538 master = netdev_master_upper_dev_get(dev); 1539 if (!master || master->ifindex != master_idx) 1540 return true; 1541 1542 return false; 1543 } 1544 1545 static bool link_kind_filtered(const struct net_device *dev, 1546 const struct rtnl_link_ops *kind_ops) 1547 { 1548 if (kind_ops && dev->rtnl_link_ops != kind_ops) 1549 return true; 1550 1551 return false; 1552 } 1553 1554 static bool link_dump_filtered(struct net_device *dev, 1555 int master_idx, 1556 const struct rtnl_link_ops *kind_ops) 1557 { 1558 if (link_master_filtered(dev, master_idx) || 1559 link_kind_filtered(dev, kind_ops)) 1560 return true; 1561 1562 return false; 1563 } 1564 1565 static int rtnl_dump_ifinfo(struct sk_buff *skb, struct netlink_callback *cb) 1566 { 1567 struct net *net = sock_net(skb->sk); 1568 int h, s_h; 1569 int idx = 0, s_idx; 1570 struct net_device *dev; 1571 struct hlist_head *head; 1572 struct nlattr *tb[IFLA_MAX+1]; 1573 u32 ext_filter_mask = 0; 1574 const struct rtnl_link_ops *kind_ops = NULL; 1575 unsigned int flags = NLM_F_MULTI; 1576 int master_idx = 0; 1577 int err; 1578 int hdrlen; 1579 1580 s_h = cb->args[0]; 1581 s_idx = cb->args[1]; 1582 1583 cb->seq = net->dev_base_seq; 1584 1585 /* A hack to preserve kernel<->userspace interface. 1586 * The correct header is ifinfomsg. It is consistent with rtnl_getlink. 1587 * However, before Linux v3.9 the code here assumed rtgenmsg and that's 1588 * what iproute2 < v3.9.0 used. 1589 * We can detect the old iproute2. Even including the IFLA_EXT_MASK 1590 * attribute, its netlink message is shorter than struct ifinfomsg. 1591 */ 1592 hdrlen = nlmsg_len(cb->nlh) < sizeof(struct ifinfomsg) ? 1593 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 1594 1595 if (nlmsg_parse(cb->nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 1596 1597 if (tb[IFLA_EXT_MASK]) 1598 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 1599 1600 if (tb[IFLA_MASTER]) 1601 master_idx = nla_get_u32(tb[IFLA_MASTER]); 1602 1603 if (tb[IFLA_LINKINFO]) 1604 kind_ops = linkinfo_to_kind_ops(tb[IFLA_LINKINFO]); 1605 1606 if (master_idx || kind_ops) 1607 flags |= NLM_F_DUMP_FILTERED; 1608 } 1609 1610 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 1611 idx = 0; 1612 head = &net->dev_index_head[h]; 1613 hlist_for_each_entry(dev, head, index_hlist) { 1614 if (link_dump_filtered(dev, master_idx, kind_ops)) 1615 goto cont; 1616 if (idx < s_idx) 1617 goto cont; 1618 err = rtnl_fill_ifinfo(skb, dev, RTM_NEWLINK, 1619 NETLINK_CB(cb->skb).portid, 1620 cb->nlh->nlmsg_seq, 0, 1621 flags, 1622 ext_filter_mask); 1623 /* If we ran out of room on the first message, 1624 * we're in trouble 1625 */ 1626 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 1627 1628 if (err < 0) 1629 goto out; 1630 1631 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 1632 cont: 1633 idx++; 1634 } 1635 } 1636 out: 1637 cb->args[1] = idx; 1638 cb->args[0] = h; 1639 1640 return skb->len; 1641 } 1642 1643 int rtnl_nla_parse_ifla(struct nlattr **tb, const struct nlattr *head, int len) 1644 { 1645 return nla_parse(tb, IFLA_MAX, head, len, ifla_policy); 1646 } 1647 EXPORT_SYMBOL(rtnl_nla_parse_ifla); 1648 1649 struct net *rtnl_link_get_net(struct net *src_net, struct nlattr *tb[]) 1650 { 1651 struct net *net; 1652 /* Examine the link attributes and figure out which 1653 * network namespace we are talking about. 1654 */ 1655 if (tb[IFLA_NET_NS_PID]) 1656 net = get_net_ns_by_pid(nla_get_u32(tb[IFLA_NET_NS_PID])); 1657 else if (tb[IFLA_NET_NS_FD]) 1658 net = get_net_ns_by_fd(nla_get_u32(tb[IFLA_NET_NS_FD])); 1659 else 1660 net = get_net(src_net); 1661 return net; 1662 } 1663 EXPORT_SYMBOL(rtnl_link_get_net); 1664 1665 static int validate_linkmsg(struct net_device *dev, struct nlattr *tb[]) 1666 { 1667 if (dev) { 1668 if (tb[IFLA_ADDRESS] && 1669 nla_len(tb[IFLA_ADDRESS]) < dev->addr_len) 1670 return -EINVAL; 1671 1672 if (tb[IFLA_BROADCAST] && 1673 nla_len(tb[IFLA_BROADCAST]) < dev->addr_len) 1674 return -EINVAL; 1675 } 1676 1677 if (tb[IFLA_AF_SPEC]) { 1678 struct nlattr *af; 1679 int rem, err; 1680 1681 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 1682 const struct rtnl_af_ops *af_ops; 1683 1684 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 1685 return -EAFNOSUPPORT; 1686 1687 if (!af_ops->set_link_af) 1688 return -EOPNOTSUPP; 1689 1690 if (af_ops->validate_link_af) { 1691 err = af_ops->validate_link_af(dev, af); 1692 if (err < 0) 1693 return err; 1694 } 1695 } 1696 } 1697 1698 return 0; 1699 } 1700 1701 static int handle_infiniband_guid(struct net_device *dev, struct ifla_vf_guid *ivt, 1702 int guid_type) 1703 { 1704 const struct net_device_ops *ops = dev->netdev_ops; 1705 1706 return ops->ndo_set_vf_guid(dev, ivt->vf, ivt->guid, guid_type); 1707 } 1708 1709 static int handle_vf_guid(struct net_device *dev, struct ifla_vf_guid *ivt, int guid_type) 1710 { 1711 if (dev->type != ARPHRD_INFINIBAND) 1712 return -EOPNOTSUPP; 1713 1714 return handle_infiniband_guid(dev, ivt, guid_type); 1715 } 1716 1717 static int do_setvfinfo(struct net_device *dev, struct nlattr **tb) 1718 { 1719 const struct net_device_ops *ops = dev->netdev_ops; 1720 int err = -EINVAL; 1721 1722 if (tb[IFLA_VF_MAC]) { 1723 struct ifla_vf_mac *ivm = nla_data(tb[IFLA_VF_MAC]); 1724 1725 err = -EOPNOTSUPP; 1726 if (ops->ndo_set_vf_mac) 1727 err = ops->ndo_set_vf_mac(dev, ivm->vf, 1728 ivm->mac); 1729 if (err < 0) 1730 return err; 1731 } 1732 1733 if (tb[IFLA_VF_VLAN]) { 1734 struct ifla_vf_vlan *ivv = nla_data(tb[IFLA_VF_VLAN]); 1735 1736 err = -EOPNOTSUPP; 1737 if (ops->ndo_set_vf_vlan) 1738 err = ops->ndo_set_vf_vlan(dev, ivv->vf, ivv->vlan, 1739 ivv->qos, 1740 htons(ETH_P_8021Q)); 1741 if (err < 0) 1742 return err; 1743 } 1744 1745 if (tb[IFLA_VF_VLAN_LIST]) { 1746 struct ifla_vf_vlan_info *ivvl[MAX_VLAN_LIST_LEN]; 1747 struct nlattr *attr; 1748 int rem, len = 0; 1749 1750 err = -EOPNOTSUPP; 1751 if (!ops->ndo_set_vf_vlan) 1752 return err; 1753 1754 nla_for_each_nested(attr, tb[IFLA_VF_VLAN_LIST], rem) { 1755 if (nla_type(attr) != IFLA_VF_VLAN_INFO || 1756 nla_len(attr) < NLA_HDRLEN) { 1757 return -EINVAL; 1758 } 1759 if (len >= MAX_VLAN_LIST_LEN) 1760 return -EOPNOTSUPP; 1761 ivvl[len] = nla_data(attr); 1762 1763 len++; 1764 } 1765 if (len == 0) 1766 return -EINVAL; 1767 1768 err = ops->ndo_set_vf_vlan(dev, ivvl[0]->vf, ivvl[0]->vlan, 1769 ivvl[0]->qos, ivvl[0]->vlan_proto); 1770 if (err < 0) 1771 return err; 1772 } 1773 1774 if (tb[IFLA_VF_TX_RATE]) { 1775 struct ifla_vf_tx_rate *ivt = nla_data(tb[IFLA_VF_TX_RATE]); 1776 struct ifla_vf_info ivf; 1777 1778 err = -EOPNOTSUPP; 1779 if (ops->ndo_get_vf_config) 1780 err = ops->ndo_get_vf_config(dev, ivt->vf, &ivf); 1781 if (err < 0) 1782 return err; 1783 1784 err = -EOPNOTSUPP; 1785 if (ops->ndo_set_vf_rate) 1786 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1787 ivf.min_tx_rate, 1788 ivt->rate); 1789 if (err < 0) 1790 return err; 1791 } 1792 1793 if (tb[IFLA_VF_RATE]) { 1794 struct ifla_vf_rate *ivt = nla_data(tb[IFLA_VF_RATE]); 1795 1796 err = -EOPNOTSUPP; 1797 if (ops->ndo_set_vf_rate) 1798 err = ops->ndo_set_vf_rate(dev, ivt->vf, 1799 ivt->min_tx_rate, 1800 ivt->max_tx_rate); 1801 if (err < 0) 1802 return err; 1803 } 1804 1805 if (tb[IFLA_VF_SPOOFCHK]) { 1806 struct ifla_vf_spoofchk *ivs = nla_data(tb[IFLA_VF_SPOOFCHK]); 1807 1808 err = -EOPNOTSUPP; 1809 if (ops->ndo_set_vf_spoofchk) 1810 err = ops->ndo_set_vf_spoofchk(dev, ivs->vf, 1811 ivs->setting); 1812 if (err < 0) 1813 return err; 1814 } 1815 1816 if (tb[IFLA_VF_LINK_STATE]) { 1817 struct ifla_vf_link_state *ivl = nla_data(tb[IFLA_VF_LINK_STATE]); 1818 1819 err = -EOPNOTSUPP; 1820 if (ops->ndo_set_vf_link_state) 1821 err = ops->ndo_set_vf_link_state(dev, ivl->vf, 1822 ivl->link_state); 1823 if (err < 0) 1824 return err; 1825 } 1826 1827 if (tb[IFLA_VF_RSS_QUERY_EN]) { 1828 struct ifla_vf_rss_query_en *ivrssq_en; 1829 1830 err = -EOPNOTSUPP; 1831 ivrssq_en = nla_data(tb[IFLA_VF_RSS_QUERY_EN]); 1832 if (ops->ndo_set_vf_rss_query_en) 1833 err = ops->ndo_set_vf_rss_query_en(dev, ivrssq_en->vf, 1834 ivrssq_en->setting); 1835 if (err < 0) 1836 return err; 1837 } 1838 1839 if (tb[IFLA_VF_TRUST]) { 1840 struct ifla_vf_trust *ivt = nla_data(tb[IFLA_VF_TRUST]); 1841 1842 err = -EOPNOTSUPP; 1843 if (ops->ndo_set_vf_trust) 1844 err = ops->ndo_set_vf_trust(dev, ivt->vf, ivt->setting); 1845 if (err < 0) 1846 return err; 1847 } 1848 1849 if (tb[IFLA_VF_IB_NODE_GUID]) { 1850 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_NODE_GUID]); 1851 1852 if (!ops->ndo_set_vf_guid) 1853 return -EOPNOTSUPP; 1854 1855 return handle_vf_guid(dev, ivt, IFLA_VF_IB_NODE_GUID); 1856 } 1857 1858 if (tb[IFLA_VF_IB_PORT_GUID]) { 1859 struct ifla_vf_guid *ivt = nla_data(tb[IFLA_VF_IB_PORT_GUID]); 1860 1861 if (!ops->ndo_set_vf_guid) 1862 return -EOPNOTSUPP; 1863 1864 return handle_vf_guid(dev, ivt, IFLA_VF_IB_PORT_GUID); 1865 } 1866 1867 return err; 1868 } 1869 1870 static int do_set_master(struct net_device *dev, int ifindex) 1871 { 1872 struct net_device *upper_dev = netdev_master_upper_dev_get(dev); 1873 const struct net_device_ops *ops; 1874 int err; 1875 1876 if (upper_dev) { 1877 if (upper_dev->ifindex == ifindex) 1878 return 0; 1879 ops = upper_dev->netdev_ops; 1880 if (ops->ndo_del_slave) { 1881 err = ops->ndo_del_slave(upper_dev, dev); 1882 if (err) 1883 return err; 1884 } else { 1885 return -EOPNOTSUPP; 1886 } 1887 } 1888 1889 if (ifindex) { 1890 upper_dev = __dev_get_by_index(dev_net(dev), ifindex); 1891 if (!upper_dev) 1892 return -EINVAL; 1893 ops = upper_dev->netdev_ops; 1894 if (ops->ndo_add_slave) { 1895 err = ops->ndo_add_slave(upper_dev, dev); 1896 if (err) 1897 return err; 1898 } else { 1899 return -EOPNOTSUPP; 1900 } 1901 } 1902 return 0; 1903 } 1904 1905 #define DO_SETLINK_MODIFIED 0x01 1906 /* notify flag means notify + modified. */ 1907 #define DO_SETLINK_NOTIFY 0x03 1908 static int do_setlink(const struct sk_buff *skb, 1909 struct net_device *dev, struct ifinfomsg *ifm, 1910 struct nlattr **tb, char *ifname, int status) 1911 { 1912 const struct net_device_ops *ops = dev->netdev_ops; 1913 int err; 1914 1915 if (tb[IFLA_NET_NS_PID] || tb[IFLA_NET_NS_FD]) { 1916 struct net *net = rtnl_link_get_net(dev_net(dev), tb); 1917 if (IS_ERR(net)) { 1918 err = PTR_ERR(net); 1919 goto errout; 1920 } 1921 if (!netlink_ns_capable(skb, net->user_ns, CAP_NET_ADMIN)) { 1922 put_net(net); 1923 err = -EPERM; 1924 goto errout; 1925 } 1926 err = dev_change_net_namespace(dev, net, ifname); 1927 put_net(net); 1928 if (err) 1929 goto errout; 1930 status |= DO_SETLINK_MODIFIED; 1931 } 1932 1933 if (tb[IFLA_MAP]) { 1934 struct rtnl_link_ifmap *u_map; 1935 struct ifmap k_map; 1936 1937 if (!ops->ndo_set_config) { 1938 err = -EOPNOTSUPP; 1939 goto errout; 1940 } 1941 1942 if (!netif_device_present(dev)) { 1943 err = -ENODEV; 1944 goto errout; 1945 } 1946 1947 u_map = nla_data(tb[IFLA_MAP]); 1948 k_map.mem_start = (unsigned long) u_map->mem_start; 1949 k_map.mem_end = (unsigned long) u_map->mem_end; 1950 k_map.base_addr = (unsigned short) u_map->base_addr; 1951 k_map.irq = (unsigned char) u_map->irq; 1952 k_map.dma = (unsigned char) u_map->dma; 1953 k_map.port = (unsigned char) u_map->port; 1954 1955 err = ops->ndo_set_config(dev, &k_map); 1956 if (err < 0) 1957 goto errout; 1958 1959 status |= DO_SETLINK_NOTIFY; 1960 } 1961 1962 if (tb[IFLA_ADDRESS]) { 1963 struct sockaddr *sa; 1964 int len; 1965 1966 len = sizeof(sa_family_t) + dev->addr_len; 1967 sa = kmalloc(len, GFP_KERNEL); 1968 if (!sa) { 1969 err = -ENOMEM; 1970 goto errout; 1971 } 1972 sa->sa_family = dev->type; 1973 memcpy(sa->sa_data, nla_data(tb[IFLA_ADDRESS]), 1974 dev->addr_len); 1975 err = dev_set_mac_address(dev, sa); 1976 kfree(sa); 1977 if (err) 1978 goto errout; 1979 status |= DO_SETLINK_MODIFIED; 1980 } 1981 1982 if (tb[IFLA_MTU]) { 1983 err = dev_set_mtu(dev, nla_get_u32(tb[IFLA_MTU])); 1984 if (err < 0) 1985 goto errout; 1986 status |= DO_SETLINK_MODIFIED; 1987 } 1988 1989 if (tb[IFLA_GROUP]) { 1990 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 1991 status |= DO_SETLINK_NOTIFY; 1992 } 1993 1994 /* 1995 * Interface selected by interface index but interface 1996 * name provided implies that a name change has been 1997 * requested. 1998 */ 1999 if (ifm->ifi_index > 0 && ifname[0]) { 2000 err = dev_change_name(dev, ifname); 2001 if (err < 0) 2002 goto errout; 2003 status |= DO_SETLINK_MODIFIED; 2004 } 2005 2006 if (tb[IFLA_IFALIAS]) { 2007 err = dev_set_alias(dev, nla_data(tb[IFLA_IFALIAS]), 2008 nla_len(tb[IFLA_IFALIAS])); 2009 if (err < 0) 2010 goto errout; 2011 status |= DO_SETLINK_NOTIFY; 2012 } 2013 2014 if (tb[IFLA_BROADCAST]) { 2015 nla_memcpy(dev->broadcast, tb[IFLA_BROADCAST], dev->addr_len); 2016 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 2017 } 2018 2019 if (ifm->ifi_flags || ifm->ifi_change) { 2020 err = dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2021 if (err < 0) 2022 goto errout; 2023 } 2024 2025 if (tb[IFLA_MASTER]) { 2026 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2027 if (err) 2028 goto errout; 2029 status |= DO_SETLINK_MODIFIED; 2030 } 2031 2032 if (tb[IFLA_CARRIER]) { 2033 err = dev_change_carrier(dev, nla_get_u8(tb[IFLA_CARRIER])); 2034 if (err) 2035 goto errout; 2036 status |= DO_SETLINK_MODIFIED; 2037 } 2038 2039 if (tb[IFLA_TXQLEN]) { 2040 unsigned long value = nla_get_u32(tb[IFLA_TXQLEN]); 2041 unsigned long orig_len = dev->tx_queue_len; 2042 2043 if (dev->tx_queue_len ^ value) { 2044 dev->tx_queue_len = value; 2045 err = call_netdevice_notifiers( 2046 NETDEV_CHANGE_TX_QUEUE_LEN, dev); 2047 err = notifier_to_errno(err); 2048 if (err) { 2049 dev->tx_queue_len = orig_len; 2050 goto errout; 2051 } 2052 status |= DO_SETLINK_NOTIFY; 2053 } 2054 } 2055 2056 if (tb[IFLA_OPERSTATE]) 2057 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2058 2059 if (tb[IFLA_LINKMODE]) { 2060 unsigned char value = nla_get_u8(tb[IFLA_LINKMODE]); 2061 2062 write_lock_bh(&dev_base_lock); 2063 if (dev->link_mode ^ value) 2064 status |= DO_SETLINK_NOTIFY; 2065 dev->link_mode = value; 2066 write_unlock_bh(&dev_base_lock); 2067 } 2068 2069 if (tb[IFLA_VFINFO_LIST]) { 2070 struct nlattr *vfinfo[IFLA_VF_MAX + 1]; 2071 struct nlattr *attr; 2072 int rem; 2073 2074 nla_for_each_nested(attr, tb[IFLA_VFINFO_LIST], rem) { 2075 if (nla_type(attr) != IFLA_VF_INFO || 2076 nla_len(attr) < NLA_HDRLEN) { 2077 err = -EINVAL; 2078 goto errout; 2079 } 2080 err = nla_parse_nested(vfinfo, IFLA_VF_MAX, attr, 2081 ifla_vf_policy); 2082 if (err < 0) 2083 goto errout; 2084 err = do_setvfinfo(dev, vfinfo); 2085 if (err < 0) 2086 goto errout; 2087 status |= DO_SETLINK_NOTIFY; 2088 } 2089 } 2090 err = 0; 2091 2092 if (tb[IFLA_VF_PORTS]) { 2093 struct nlattr *port[IFLA_PORT_MAX+1]; 2094 struct nlattr *attr; 2095 int vf; 2096 int rem; 2097 2098 err = -EOPNOTSUPP; 2099 if (!ops->ndo_set_vf_port) 2100 goto errout; 2101 2102 nla_for_each_nested(attr, tb[IFLA_VF_PORTS], rem) { 2103 if (nla_type(attr) != IFLA_VF_PORT || 2104 nla_len(attr) < NLA_HDRLEN) { 2105 err = -EINVAL; 2106 goto errout; 2107 } 2108 err = nla_parse_nested(port, IFLA_PORT_MAX, attr, 2109 ifla_port_policy); 2110 if (err < 0) 2111 goto errout; 2112 if (!port[IFLA_PORT_VF]) { 2113 err = -EOPNOTSUPP; 2114 goto errout; 2115 } 2116 vf = nla_get_u32(port[IFLA_PORT_VF]); 2117 err = ops->ndo_set_vf_port(dev, vf, port); 2118 if (err < 0) 2119 goto errout; 2120 status |= DO_SETLINK_NOTIFY; 2121 } 2122 } 2123 err = 0; 2124 2125 if (tb[IFLA_PORT_SELF]) { 2126 struct nlattr *port[IFLA_PORT_MAX+1]; 2127 2128 err = nla_parse_nested(port, IFLA_PORT_MAX, 2129 tb[IFLA_PORT_SELF], ifla_port_policy); 2130 if (err < 0) 2131 goto errout; 2132 2133 err = -EOPNOTSUPP; 2134 if (ops->ndo_set_vf_port) 2135 err = ops->ndo_set_vf_port(dev, PORT_SELF_VF, port); 2136 if (err < 0) 2137 goto errout; 2138 status |= DO_SETLINK_NOTIFY; 2139 } 2140 2141 if (tb[IFLA_AF_SPEC]) { 2142 struct nlattr *af; 2143 int rem; 2144 2145 nla_for_each_nested(af, tb[IFLA_AF_SPEC], rem) { 2146 const struct rtnl_af_ops *af_ops; 2147 2148 if (!(af_ops = rtnl_af_lookup(nla_type(af)))) 2149 BUG(); 2150 2151 err = af_ops->set_link_af(dev, af); 2152 if (err < 0) 2153 goto errout; 2154 2155 status |= DO_SETLINK_NOTIFY; 2156 } 2157 } 2158 err = 0; 2159 2160 if (tb[IFLA_PROTO_DOWN]) { 2161 err = dev_change_proto_down(dev, 2162 nla_get_u8(tb[IFLA_PROTO_DOWN])); 2163 if (err) 2164 goto errout; 2165 status |= DO_SETLINK_NOTIFY; 2166 } 2167 2168 if (tb[IFLA_XDP]) { 2169 struct nlattr *xdp[IFLA_XDP_MAX + 1]; 2170 u32 xdp_flags = 0; 2171 2172 err = nla_parse_nested(xdp, IFLA_XDP_MAX, tb[IFLA_XDP], 2173 ifla_xdp_policy); 2174 if (err < 0) 2175 goto errout; 2176 2177 if (xdp[IFLA_XDP_ATTACHED]) { 2178 err = -EINVAL; 2179 goto errout; 2180 } 2181 2182 if (xdp[IFLA_XDP_FLAGS]) { 2183 xdp_flags = nla_get_u32(xdp[IFLA_XDP_FLAGS]); 2184 if (xdp_flags & ~XDP_FLAGS_MASK) { 2185 err = -EINVAL; 2186 goto errout; 2187 } 2188 } 2189 2190 if (xdp[IFLA_XDP_FD]) { 2191 err = dev_change_xdp_fd(dev, 2192 nla_get_s32(xdp[IFLA_XDP_FD]), 2193 xdp_flags); 2194 if (err) 2195 goto errout; 2196 status |= DO_SETLINK_NOTIFY; 2197 } 2198 } 2199 2200 errout: 2201 if (status & DO_SETLINK_MODIFIED) { 2202 if (status & DO_SETLINK_NOTIFY) 2203 netdev_state_change(dev); 2204 2205 if (err < 0) 2206 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", 2207 dev->name); 2208 } 2209 2210 return err; 2211 } 2212 2213 static int rtnl_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2214 { 2215 struct net *net = sock_net(skb->sk); 2216 struct ifinfomsg *ifm; 2217 struct net_device *dev; 2218 int err; 2219 struct nlattr *tb[IFLA_MAX+1]; 2220 char ifname[IFNAMSIZ]; 2221 2222 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2223 if (err < 0) 2224 goto errout; 2225 2226 if (tb[IFLA_IFNAME]) 2227 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2228 else 2229 ifname[0] = '\0'; 2230 2231 err = -EINVAL; 2232 ifm = nlmsg_data(nlh); 2233 if (ifm->ifi_index > 0) 2234 dev = __dev_get_by_index(net, ifm->ifi_index); 2235 else if (tb[IFLA_IFNAME]) 2236 dev = __dev_get_by_name(net, ifname); 2237 else 2238 goto errout; 2239 2240 if (dev == NULL) { 2241 err = -ENODEV; 2242 goto errout; 2243 } 2244 2245 err = validate_linkmsg(dev, tb); 2246 if (err < 0) 2247 goto errout; 2248 2249 err = do_setlink(skb, dev, ifm, tb, ifname, 0); 2250 errout: 2251 return err; 2252 } 2253 2254 static int rtnl_group_dellink(const struct net *net, int group) 2255 { 2256 struct net_device *dev, *aux; 2257 LIST_HEAD(list_kill); 2258 bool found = false; 2259 2260 if (!group) 2261 return -EPERM; 2262 2263 for_each_netdev(net, dev) { 2264 if (dev->group == group) { 2265 const struct rtnl_link_ops *ops; 2266 2267 found = true; 2268 ops = dev->rtnl_link_ops; 2269 if (!ops || !ops->dellink) 2270 return -EOPNOTSUPP; 2271 } 2272 } 2273 2274 if (!found) 2275 return -ENODEV; 2276 2277 for_each_netdev_safe(net, dev, aux) { 2278 if (dev->group == group) { 2279 const struct rtnl_link_ops *ops; 2280 2281 ops = dev->rtnl_link_ops; 2282 ops->dellink(dev, &list_kill); 2283 } 2284 } 2285 unregister_netdevice_many(&list_kill); 2286 2287 return 0; 2288 } 2289 2290 int rtnl_delete_link(struct net_device *dev) 2291 { 2292 const struct rtnl_link_ops *ops; 2293 LIST_HEAD(list_kill); 2294 2295 ops = dev->rtnl_link_ops; 2296 if (!ops || !ops->dellink) 2297 return -EOPNOTSUPP; 2298 2299 ops->dellink(dev, &list_kill); 2300 unregister_netdevice_many(&list_kill); 2301 2302 return 0; 2303 } 2304 EXPORT_SYMBOL_GPL(rtnl_delete_link); 2305 2306 static int rtnl_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 2307 { 2308 struct net *net = sock_net(skb->sk); 2309 struct net_device *dev; 2310 struct ifinfomsg *ifm; 2311 char ifname[IFNAMSIZ]; 2312 struct nlattr *tb[IFLA_MAX+1]; 2313 int err; 2314 2315 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2316 if (err < 0) 2317 return err; 2318 2319 if (tb[IFLA_IFNAME]) 2320 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2321 2322 ifm = nlmsg_data(nlh); 2323 if (ifm->ifi_index > 0) 2324 dev = __dev_get_by_index(net, ifm->ifi_index); 2325 else if (tb[IFLA_IFNAME]) 2326 dev = __dev_get_by_name(net, ifname); 2327 else if (tb[IFLA_GROUP]) 2328 return rtnl_group_dellink(net, nla_get_u32(tb[IFLA_GROUP])); 2329 else 2330 return -EINVAL; 2331 2332 if (!dev) 2333 return -ENODEV; 2334 2335 return rtnl_delete_link(dev); 2336 } 2337 2338 int rtnl_configure_link(struct net_device *dev, const struct ifinfomsg *ifm) 2339 { 2340 unsigned int old_flags; 2341 int err; 2342 2343 old_flags = dev->flags; 2344 if (ifm && (ifm->ifi_flags || ifm->ifi_change)) { 2345 err = __dev_change_flags(dev, rtnl_dev_combine_flags(dev, ifm)); 2346 if (err < 0) 2347 return err; 2348 } 2349 2350 dev->rtnl_link_state = RTNL_LINK_INITIALIZED; 2351 2352 __dev_notify_flags(dev, old_flags, ~0U); 2353 return 0; 2354 } 2355 EXPORT_SYMBOL(rtnl_configure_link); 2356 2357 struct net_device *rtnl_create_link(struct net *net, 2358 const char *ifname, unsigned char name_assign_type, 2359 const struct rtnl_link_ops *ops, struct nlattr *tb[]) 2360 { 2361 struct net_device *dev; 2362 unsigned int num_tx_queues = 1; 2363 unsigned int num_rx_queues = 1; 2364 2365 if (tb[IFLA_NUM_TX_QUEUES]) 2366 num_tx_queues = nla_get_u32(tb[IFLA_NUM_TX_QUEUES]); 2367 else if (ops->get_num_tx_queues) 2368 num_tx_queues = ops->get_num_tx_queues(); 2369 2370 if (tb[IFLA_NUM_RX_QUEUES]) 2371 num_rx_queues = nla_get_u32(tb[IFLA_NUM_RX_QUEUES]); 2372 else if (ops->get_num_rx_queues) 2373 num_rx_queues = ops->get_num_rx_queues(); 2374 2375 dev = alloc_netdev_mqs(ops->priv_size, ifname, name_assign_type, 2376 ops->setup, num_tx_queues, num_rx_queues); 2377 if (!dev) 2378 return ERR_PTR(-ENOMEM); 2379 2380 dev_net_set(dev, net); 2381 dev->rtnl_link_ops = ops; 2382 dev->rtnl_link_state = RTNL_LINK_INITIALIZING; 2383 2384 if (tb[IFLA_MTU]) 2385 dev->mtu = nla_get_u32(tb[IFLA_MTU]); 2386 if (tb[IFLA_ADDRESS]) { 2387 memcpy(dev->dev_addr, nla_data(tb[IFLA_ADDRESS]), 2388 nla_len(tb[IFLA_ADDRESS])); 2389 dev->addr_assign_type = NET_ADDR_SET; 2390 } 2391 if (tb[IFLA_BROADCAST]) 2392 memcpy(dev->broadcast, nla_data(tb[IFLA_BROADCAST]), 2393 nla_len(tb[IFLA_BROADCAST])); 2394 if (tb[IFLA_TXQLEN]) 2395 dev->tx_queue_len = nla_get_u32(tb[IFLA_TXQLEN]); 2396 if (tb[IFLA_OPERSTATE]) 2397 set_operstate(dev, nla_get_u8(tb[IFLA_OPERSTATE])); 2398 if (tb[IFLA_LINKMODE]) 2399 dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]); 2400 if (tb[IFLA_GROUP]) 2401 dev_set_group(dev, nla_get_u32(tb[IFLA_GROUP])); 2402 2403 return dev; 2404 } 2405 EXPORT_SYMBOL(rtnl_create_link); 2406 2407 static int rtnl_group_changelink(const struct sk_buff *skb, 2408 struct net *net, int group, 2409 struct ifinfomsg *ifm, 2410 struct nlattr **tb) 2411 { 2412 struct net_device *dev, *aux; 2413 int err; 2414 2415 for_each_netdev_safe(net, dev, aux) { 2416 if (dev->group == group) { 2417 err = do_setlink(skb, dev, ifm, tb, NULL, 0); 2418 if (err < 0) 2419 return err; 2420 } 2421 } 2422 2423 return 0; 2424 } 2425 2426 static int rtnl_newlink(struct sk_buff *skb, struct nlmsghdr *nlh) 2427 { 2428 struct net *net = sock_net(skb->sk); 2429 const struct rtnl_link_ops *ops; 2430 const struct rtnl_link_ops *m_ops = NULL; 2431 struct net_device *dev; 2432 struct net_device *master_dev = NULL; 2433 struct ifinfomsg *ifm; 2434 char kind[MODULE_NAME_LEN]; 2435 char ifname[IFNAMSIZ]; 2436 struct nlattr *tb[IFLA_MAX+1]; 2437 struct nlattr *linkinfo[IFLA_INFO_MAX+1]; 2438 unsigned char name_assign_type = NET_NAME_USER; 2439 int err; 2440 2441 #ifdef CONFIG_MODULES 2442 replay: 2443 #endif 2444 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2445 if (err < 0) 2446 return err; 2447 2448 if (tb[IFLA_IFNAME]) 2449 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2450 else 2451 ifname[0] = '\0'; 2452 2453 ifm = nlmsg_data(nlh); 2454 if (ifm->ifi_index > 0) 2455 dev = __dev_get_by_index(net, ifm->ifi_index); 2456 else { 2457 if (ifname[0]) 2458 dev = __dev_get_by_name(net, ifname); 2459 else 2460 dev = NULL; 2461 } 2462 2463 if (dev) { 2464 master_dev = netdev_master_upper_dev_get(dev); 2465 if (master_dev) 2466 m_ops = master_dev->rtnl_link_ops; 2467 } 2468 2469 err = validate_linkmsg(dev, tb); 2470 if (err < 0) 2471 return err; 2472 2473 if (tb[IFLA_LINKINFO]) { 2474 err = nla_parse_nested(linkinfo, IFLA_INFO_MAX, 2475 tb[IFLA_LINKINFO], ifla_info_policy); 2476 if (err < 0) 2477 return err; 2478 } else 2479 memset(linkinfo, 0, sizeof(linkinfo)); 2480 2481 if (linkinfo[IFLA_INFO_KIND]) { 2482 nla_strlcpy(kind, linkinfo[IFLA_INFO_KIND], sizeof(kind)); 2483 ops = rtnl_link_ops_get(kind); 2484 } else { 2485 kind[0] = '\0'; 2486 ops = NULL; 2487 } 2488 2489 if (1) { 2490 struct nlattr *attr[ops ? ops->maxtype + 1 : 1]; 2491 struct nlattr *slave_attr[m_ops ? m_ops->slave_maxtype + 1 : 1]; 2492 struct nlattr **data = NULL; 2493 struct nlattr **slave_data = NULL; 2494 struct net *dest_net, *link_net = NULL; 2495 2496 if (ops) { 2497 if (ops->maxtype && linkinfo[IFLA_INFO_DATA]) { 2498 err = nla_parse_nested(attr, ops->maxtype, 2499 linkinfo[IFLA_INFO_DATA], 2500 ops->policy); 2501 if (err < 0) 2502 return err; 2503 data = attr; 2504 } 2505 if (ops->validate) { 2506 err = ops->validate(tb, data); 2507 if (err < 0) 2508 return err; 2509 } 2510 } 2511 2512 if (m_ops) { 2513 if (m_ops->slave_maxtype && 2514 linkinfo[IFLA_INFO_SLAVE_DATA]) { 2515 err = nla_parse_nested(slave_attr, 2516 m_ops->slave_maxtype, 2517 linkinfo[IFLA_INFO_SLAVE_DATA], 2518 m_ops->slave_policy); 2519 if (err < 0) 2520 return err; 2521 slave_data = slave_attr; 2522 } 2523 if (m_ops->slave_validate) { 2524 err = m_ops->slave_validate(tb, slave_data); 2525 if (err < 0) 2526 return err; 2527 } 2528 } 2529 2530 if (dev) { 2531 int status = 0; 2532 2533 if (nlh->nlmsg_flags & NLM_F_EXCL) 2534 return -EEXIST; 2535 if (nlh->nlmsg_flags & NLM_F_REPLACE) 2536 return -EOPNOTSUPP; 2537 2538 if (linkinfo[IFLA_INFO_DATA]) { 2539 if (!ops || ops != dev->rtnl_link_ops || 2540 !ops->changelink) 2541 return -EOPNOTSUPP; 2542 2543 err = ops->changelink(dev, tb, data); 2544 if (err < 0) 2545 return err; 2546 status |= DO_SETLINK_NOTIFY; 2547 } 2548 2549 if (linkinfo[IFLA_INFO_SLAVE_DATA]) { 2550 if (!m_ops || !m_ops->slave_changelink) 2551 return -EOPNOTSUPP; 2552 2553 err = m_ops->slave_changelink(master_dev, dev, 2554 tb, slave_data); 2555 if (err < 0) 2556 return err; 2557 status |= DO_SETLINK_NOTIFY; 2558 } 2559 2560 return do_setlink(skb, dev, ifm, tb, ifname, status); 2561 } 2562 2563 if (!(nlh->nlmsg_flags & NLM_F_CREATE)) { 2564 if (ifm->ifi_index == 0 && tb[IFLA_GROUP]) 2565 return rtnl_group_changelink(skb, net, 2566 nla_get_u32(tb[IFLA_GROUP]), 2567 ifm, tb); 2568 return -ENODEV; 2569 } 2570 2571 if (tb[IFLA_MAP] || tb[IFLA_PROTINFO]) 2572 return -EOPNOTSUPP; 2573 2574 if (!ops) { 2575 #ifdef CONFIG_MODULES 2576 if (kind[0]) { 2577 __rtnl_unlock(); 2578 request_module("rtnl-link-%s", kind); 2579 rtnl_lock(); 2580 ops = rtnl_link_ops_get(kind); 2581 if (ops) 2582 goto replay; 2583 } 2584 #endif 2585 return -EOPNOTSUPP; 2586 } 2587 2588 if (!ops->setup) 2589 return -EOPNOTSUPP; 2590 2591 if (!ifname[0]) { 2592 snprintf(ifname, IFNAMSIZ, "%s%%d", ops->kind); 2593 name_assign_type = NET_NAME_ENUM; 2594 } 2595 2596 dest_net = rtnl_link_get_net(net, tb); 2597 if (IS_ERR(dest_net)) 2598 return PTR_ERR(dest_net); 2599 2600 err = -EPERM; 2601 if (!netlink_ns_capable(skb, dest_net->user_ns, CAP_NET_ADMIN)) 2602 goto out; 2603 2604 if (tb[IFLA_LINK_NETNSID]) { 2605 int id = nla_get_s32(tb[IFLA_LINK_NETNSID]); 2606 2607 link_net = get_net_ns_by_id(dest_net, id); 2608 if (!link_net) { 2609 err = -EINVAL; 2610 goto out; 2611 } 2612 err = -EPERM; 2613 if (!netlink_ns_capable(skb, link_net->user_ns, CAP_NET_ADMIN)) 2614 goto out; 2615 } 2616 2617 dev = rtnl_create_link(link_net ? : dest_net, ifname, 2618 name_assign_type, ops, tb); 2619 if (IS_ERR(dev)) { 2620 err = PTR_ERR(dev); 2621 goto out; 2622 } 2623 2624 dev->ifindex = ifm->ifi_index; 2625 2626 if (ops->newlink) { 2627 err = ops->newlink(link_net ? : net, dev, tb, data); 2628 /* Drivers should call free_netdev() in ->destructor 2629 * and unregister it on failure after registration 2630 * so that device could be finally freed in rtnl_unlock. 2631 */ 2632 if (err < 0) { 2633 /* If device is not registered at all, free it now */ 2634 if (dev->reg_state == NETREG_UNINITIALIZED) 2635 free_netdev(dev); 2636 goto out; 2637 } 2638 } else { 2639 err = register_netdevice(dev); 2640 if (err < 0) { 2641 free_netdev(dev); 2642 goto out; 2643 } 2644 } 2645 err = rtnl_configure_link(dev, ifm); 2646 if (err < 0) 2647 goto out_unregister; 2648 if (link_net) { 2649 err = dev_change_net_namespace(dev, dest_net, ifname); 2650 if (err < 0) 2651 goto out_unregister; 2652 } 2653 if (tb[IFLA_MASTER]) { 2654 err = do_set_master(dev, nla_get_u32(tb[IFLA_MASTER])); 2655 if (err) 2656 goto out_unregister; 2657 } 2658 out: 2659 if (link_net) 2660 put_net(link_net); 2661 put_net(dest_net); 2662 return err; 2663 out_unregister: 2664 if (ops->newlink) { 2665 LIST_HEAD(list_kill); 2666 2667 ops->dellink(dev, &list_kill); 2668 unregister_netdevice_many(&list_kill); 2669 } else { 2670 unregister_netdevice(dev); 2671 } 2672 goto out; 2673 } 2674 } 2675 2676 static int rtnl_getlink(struct sk_buff *skb, struct nlmsghdr* nlh) 2677 { 2678 struct net *net = sock_net(skb->sk); 2679 struct ifinfomsg *ifm; 2680 char ifname[IFNAMSIZ]; 2681 struct nlattr *tb[IFLA_MAX+1]; 2682 struct net_device *dev = NULL; 2683 struct sk_buff *nskb; 2684 int err; 2685 u32 ext_filter_mask = 0; 2686 2687 err = nlmsg_parse(nlh, sizeof(*ifm), tb, IFLA_MAX, ifla_policy); 2688 if (err < 0) 2689 return err; 2690 2691 if (tb[IFLA_IFNAME]) 2692 nla_strlcpy(ifname, tb[IFLA_IFNAME], IFNAMSIZ); 2693 2694 if (tb[IFLA_EXT_MASK]) 2695 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2696 2697 ifm = nlmsg_data(nlh); 2698 if (ifm->ifi_index > 0) 2699 dev = __dev_get_by_index(net, ifm->ifi_index); 2700 else if (tb[IFLA_IFNAME]) 2701 dev = __dev_get_by_name(net, ifname); 2702 else 2703 return -EINVAL; 2704 2705 if (dev == NULL) 2706 return -ENODEV; 2707 2708 nskb = nlmsg_new(if_nlmsg_size(dev, ext_filter_mask), GFP_KERNEL); 2709 if (nskb == NULL) 2710 return -ENOBUFS; 2711 2712 err = rtnl_fill_ifinfo(nskb, dev, RTM_NEWLINK, NETLINK_CB(skb).portid, 2713 nlh->nlmsg_seq, 0, 0, ext_filter_mask); 2714 if (err < 0) { 2715 /* -EMSGSIZE implies BUG in if_nlmsg_size */ 2716 WARN_ON(err == -EMSGSIZE); 2717 kfree_skb(nskb); 2718 } else 2719 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 2720 2721 return err; 2722 } 2723 2724 static u16 rtnl_calcit(struct sk_buff *skb, struct nlmsghdr *nlh) 2725 { 2726 struct net *net = sock_net(skb->sk); 2727 struct net_device *dev; 2728 struct nlattr *tb[IFLA_MAX+1]; 2729 u32 ext_filter_mask = 0; 2730 u16 min_ifinfo_dump_size = 0; 2731 int hdrlen; 2732 2733 /* Same kernel<->userspace interface hack as in rtnl_dump_ifinfo. */ 2734 hdrlen = nlmsg_len(nlh) < sizeof(struct ifinfomsg) ? 2735 sizeof(struct rtgenmsg) : sizeof(struct ifinfomsg); 2736 2737 if (nlmsg_parse(nlh, hdrlen, tb, IFLA_MAX, ifla_policy) >= 0) { 2738 if (tb[IFLA_EXT_MASK]) 2739 ext_filter_mask = nla_get_u32(tb[IFLA_EXT_MASK]); 2740 } 2741 2742 if (!ext_filter_mask) 2743 return NLMSG_GOODSIZE; 2744 /* 2745 * traverse the list of net devices and compute the minimum 2746 * buffer size based upon the filter mask. 2747 */ 2748 list_for_each_entry(dev, &net->dev_base_head, dev_list) { 2749 min_ifinfo_dump_size = max_t(u16, min_ifinfo_dump_size, 2750 if_nlmsg_size(dev, 2751 ext_filter_mask)); 2752 } 2753 2754 return nlmsg_total_size(min_ifinfo_dump_size); 2755 } 2756 2757 static int rtnl_dump_all(struct sk_buff *skb, struct netlink_callback *cb) 2758 { 2759 int idx; 2760 int s_idx = cb->family; 2761 2762 if (s_idx == 0) 2763 s_idx = 1; 2764 for (idx = 1; idx <= RTNL_FAMILY_MAX; idx++) { 2765 int type = cb->nlh->nlmsg_type-RTM_BASE; 2766 if (idx < s_idx || idx == PF_PACKET) 2767 continue; 2768 if (rtnl_msg_handlers[idx] == NULL || 2769 rtnl_msg_handlers[idx][type].dumpit == NULL) 2770 continue; 2771 if (idx > s_idx) { 2772 memset(&cb->args[0], 0, sizeof(cb->args)); 2773 cb->prev_seq = 0; 2774 cb->seq = 0; 2775 } 2776 if (rtnl_msg_handlers[idx][type].dumpit(skb, cb)) 2777 break; 2778 } 2779 cb->family = idx; 2780 2781 return skb->len; 2782 } 2783 2784 struct sk_buff *rtmsg_ifinfo_build_skb(int type, struct net_device *dev, 2785 unsigned int change, gfp_t flags) 2786 { 2787 struct net *net = dev_net(dev); 2788 struct sk_buff *skb; 2789 int err = -ENOBUFS; 2790 size_t if_info_size; 2791 2792 skb = nlmsg_new((if_info_size = if_nlmsg_size(dev, 0)), flags); 2793 if (skb == NULL) 2794 goto errout; 2795 2796 err = rtnl_fill_ifinfo(skb, dev, type, 0, 0, change, 0, 0); 2797 if (err < 0) { 2798 /* -EMSGSIZE implies BUG in if_nlmsg_size() */ 2799 WARN_ON(err == -EMSGSIZE); 2800 kfree_skb(skb); 2801 goto errout; 2802 } 2803 return skb; 2804 errout: 2805 if (err < 0) 2806 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 2807 return NULL; 2808 } 2809 2810 void rtmsg_ifinfo_send(struct sk_buff *skb, struct net_device *dev, gfp_t flags) 2811 { 2812 struct net *net = dev_net(dev); 2813 2814 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, flags); 2815 } 2816 2817 void rtmsg_ifinfo(int type, struct net_device *dev, unsigned int change, 2818 gfp_t flags) 2819 { 2820 struct sk_buff *skb; 2821 2822 if (dev->reg_state != NETREG_REGISTERED) 2823 return; 2824 2825 skb = rtmsg_ifinfo_build_skb(type, dev, change, flags); 2826 if (skb) 2827 rtmsg_ifinfo_send(skb, dev, flags); 2828 } 2829 EXPORT_SYMBOL(rtmsg_ifinfo); 2830 2831 static int nlmsg_populate_fdb_fill(struct sk_buff *skb, 2832 struct net_device *dev, 2833 u8 *addr, u16 vid, u32 pid, u32 seq, 2834 int type, unsigned int flags, 2835 int nlflags, u16 ndm_state) 2836 { 2837 struct nlmsghdr *nlh; 2838 struct ndmsg *ndm; 2839 2840 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ndm), nlflags); 2841 if (!nlh) 2842 return -EMSGSIZE; 2843 2844 ndm = nlmsg_data(nlh); 2845 ndm->ndm_family = AF_BRIDGE; 2846 ndm->ndm_pad1 = 0; 2847 ndm->ndm_pad2 = 0; 2848 ndm->ndm_flags = flags; 2849 ndm->ndm_type = 0; 2850 ndm->ndm_ifindex = dev->ifindex; 2851 ndm->ndm_state = ndm_state; 2852 2853 if (nla_put(skb, NDA_LLADDR, ETH_ALEN, addr)) 2854 goto nla_put_failure; 2855 if (vid) 2856 if (nla_put(skb, NDA_VLAN, sizeof(u16), &vid)) 2857 goto nla_put_failure; 2858 2859 nlmsg_end(skb, nlh); 2860 return 0; 2861 2862 nla_put_failure: 2863 nlmsg_cancel(skb, nlh); 2864 return -EMSGSIZE; 2865 } 2866 2867 static inline size_t rtnl_fdb_nlmsg_size(void) 2868 { 2869 return NLMSG_ALIGN(sizeof(struct ndmsg)) + 2870 nla_total_size(ETH_ALEN) + /* NDA_LLADDR */ 2871 nla_total_size(sizeof(u16)) + /* NDA_VLAN */ 2872 0; 2873 } 2874 2875 static void rtnl_fdb_notify(struct net_device *dev, u8 *addr, u16 vid, int type, 2876 u16 ndm_state) 2877 { 2878 struct net *net = dev_net(dev); 2879 struct sk_buff *skb; 2880 int err = -ENOBUFS; 2881 2882 skb = nlmsg_new(rtnl_fdb_nlmsg_size(), GFP_ATOMIC); 2883 if (!skb) 2884 goto errout; 2885 2886 err = nlmsg_populate_fdb_fill(skb, dev, addr, vid, 2887 0, 0, type, NTF_SELF, 0, ndm_state); 2888 if (err < 0) { 2889 kfree_skb(skb); 2890 goto errout; 2891 } 2892 2893 rtnl_notify(skb, net, 0, RTNLGRP_NEIGH, NULL, GFP_ATOMIC); 2894 return; 2895 errout: 2896 rtnl_set_sk_err(net, RTNLGRP_NEIGH, err); 2897 } 2898 2899 /** 2900 * ndo_dflt_fdb_add - default netdevice operation to add an FDB entry 2901 */ 2902 int ndo_dflt_fdb_add(struct ndmsg *ndm, 2903 struct nlattr *tb[], 2904 struct net_device *dev, 2905 const unsigned char *addr, u16 vid, 2906 u16 flags) 2907 { 2908 int err = -EINVAL; 2909 2910 /* If aging addresses are supported device will need to 2911 * implement its own handler for this. 2912 */ 2913 if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) { 2914 pr_info("%s: FDB only supports static addresses\n", dev->name); 2915 return err; 2916 } 2917 2918 if (vid) { 2919 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name); 2920 return err; 2921 } 2922 2923 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 2924 err = dev_uc_add_excl(dev, addr); 2925 else if (is_multicast_ether_addr(addr)) 2926 err = dev_mc_add_excl(dev, addr); 2927 2928 /* Only return duplicate errors if NLM_F_EXCL is set */ 2929 if (err == -EEXIST && !(flags & NLM_F_EXCL)) 2930 err = 0; 2931 2932 return err; 2933 } 2934 EXPORT_SYMBOL(ndo_dflt_fdb_add); 2935 2936 static int fdb_vid_parse(struct nlattr *vlan_attr, u16 *p_vid) 2937 { 2938 u16 vid = 0; 2939 2940 if (vlan_attr) { 2941 if (nla_len(vlan_attr) != sizeof(u16)) { 2942 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan\n"); 2943 return -EINVAL; 2944 } 2945 2946 vid = nla_get_u16(vlan_attr); 2947 2948 if (!vid || vid >= VLAN_VID_MASK) { 2949 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid vlan id %d\n", 2950 vid); 2951 return -EINVAL; 2952 } 2953 } 2954 *p_vid = vid; 2955 return 0; 2956 } 2957 2958 static int rtnl_fdb_add(struct sk_buff *skb, struct nlmsghdr *nlh) 2959 { 2960 struct net *net = sock_net(skb->sk); 2961 struct ndmsg *ndm; 2962 struct nlattr *tb[NDA_MAX+1]; 2963 struct net_device *dev; 2964 u8 *addr; 2965 u16 vid; 2966 int err; 2967 2968 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 2969 if (err < 0) 2970 return err; 2971 2972 ndm = nlmsg_data(nlh); 2973 if (ndm->ndm_ifindex == 0) { 2974 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid ifindex\n"); 2975 return -EINVAL; 2976 } 2977 2978 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 2979 if (dev == NULL) { 2980 pr_info("PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex\n"); 2981 return -ENODEV; 2982 } 2983 2984 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 2985 pr_info("PF_BRIDGE: RTM_NEWNEIGH with invalid address\n"); 2986 return -EINVAL; 2987 } 2988 2989 addr = nla_data(tb[NDA_LLADDR]); 2990 2991 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 2992 if (err) 2993 return err; 2994 2995 err = -EOPNOTSUPP; 2996 2997 /* Support fdb on master device the net/bridge default case */ 2998 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 2999 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3000 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3001 const struct net_device_ops *ops = br_dev->netdev_ops; 3002 3003 err = ops->ndo_fdb_add(ndm, tb, dev, addr, vid, 3004 nlh->nlmsg_flags); 3005 if (err) 3006 goto out; 3007 else 3008 ndm->ndm_flags &= ~NTF_MASTER; 3009 } 3010 3011 /* Embedded bridge, macvlan, and any other device support */ 3012 if ((ndm->ndm_flags & NTF_SELF)) { 3013 if (dev->netdev_ops->ndo_fdb_add) 3014 err = dev->netdev_ops->ndo_fdb_add(ndm, tb, dev, addr, 3015 vid, 3016 nlh->nlmsg_flags); 3017 else 3018 err = ndo_dflt_fdb_add(ndm, tb, dev, addr, vid, 3019 nlh->nlmsg_flags); 3020 3021 if (!err) { 3022 rtnl_fdb_notify(dev, addr, vid, RTM_NEWNEIGH, 3023 ndm->ndm_state); 3024 ndm->ndm_flags &= ~NTF_SELF; 3025 } 3026 } 3027 out: 3028 return err; 3029 } 3030 3031 /** 3032 * ndo_dflt_fdb_del - default netdevice operation to delete an FDB entry 3033 */ 3034 int ndo_dflt_fdb_del(struct ndmsg *ndm, 3035 struct nlattr *tb[], 3036 struct net_device *dev, 3037 const unsigned char *addr, u16 vid) 3038 { 3039 int err = -EINVAL; 3040 3041 /* If aging addresses are supported device will need to 3042 * implement its own handler for this. 3043 */ 3044 if (!(ndm->ndm_state & NUD_PERMANENT)) { 3045 pr_info("%s: FDB only supports static addresses\n", dev->name); 3046 return err; 3047 } 3048 3049 if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr)) 3050 err = dev_uc_del(dev, addr); 3051 else if (is_multicast_ether_addr(addr)) 3052 err = dev_mc_del(dev, addr); 3053 3054 return err; 3055 } 3056 EXPORT_SYMBOL(ndo_dflt_fdb_del); 3057 3058 static int rtnl_fdb_del(struct sk_buff *skb, struct nlmsghdr *nlh) 3059 { 3060 struct net *net = sock_net(skb->sk); 3061 struct ndmsg *ndm; 3062 struct nlattr *tb[NDA_MAX+1]; 3063 struct net_device *dev; 3064 int err = -EINVAL; 3065 __u8 *addr; 3066 u16 vid; 3067 3068 if (!netlink_capable(skb, CAP_NET_ADMIN)) 3069 return -EPERM; 3070 3071 err = nlmsg_parse(nlh, sizeof(*ndm), tb, NDA_MAX, NULL); 3072 if (err < 0) 3073 return err; 3074 3075 ndm = nlmsg_data(nlh); 3076 if (ndm->ndm_ifindex == 0) { 3077 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid ifindex\n"); 3078 return -EINVAL; 3079 } 3080 3081 dev = __dev_get_by_index(net, ndm->ndm_ifindex); 3082 if (dev == NULL) { 3083 pr_info("PF_BRIDGE: RTM_DELNEIGH with unknown ifindex\n"); 3084 return -ENODEV; 3085 } 3086 3087 if (!tb[NDA_LLADDR] || nla_len(tb[NDA_LLADDR]) != ETH_ALEN) { 3088 pr_info("PF_BRIDGE: RTM_DELNEIGH with invalid address\n"); 3089 return -EINVAL; 3090 } 3091 3092 addr = nla_data(tb[NDA_LLADDR]); 3093 3094 err = fdb_vid_parse(tb[NDA_VLAN], &vid); 3095 if (err) 3096 return err; 3097 3098 err = -EOPNOTSUPP; 3099 3100 /* Support fdb on master device the net/bridge default case */ 3101 if ((!ndm->ndm_flags || ndm->ndm_flags & NTF_MASTER) && 3102 (dev->priv_flags & IFF_BRIDGE_PORT)) { 3103 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3104 const struct net_device_ops *ops = br_dev->netdev_ops; 3105 3106 if (ops->ndo_fdb_del) 3107 err = ops->ndo_fdb_del(ndm, tb, dev, addr, vid); 3108 3109 if (err) 3110 goto out; 3111 else 3112 ndm->ndm_flags &= ~NTF_MASTER; 3113 } 3114 3115 /* Embedded bridge, macvlan, and any other device support */ 3116 if (ndm->ndm_flags & NTF_SELF) { 3117 if (dev->netdev_ops->ndo_fdb_del) 3118 err = dev->netdev_ops->ndo_fdb_del(ndm, tb, dev, addr, 3119 vid); 3120 else 3121 err = ndo_dflt_fdb_del(ndm, tb, dev, addr, vid); 3122 3123 if (!err) { 3124 rtnl_fdb_notify(dev, addr, vid, RTM_DELNEIGH, 3125 ndm->ndm_state); 3126 ndm->ndm_flags &= ~NTF_SELF; 3127 } 3128 } 3129 out: 3130 return err; 3131 } 3132 3133 static int nlmsg_populate_fdb(struct sk_buff *skb, 3134 struct netlink_callback *cb, 3135 struct net_device *dev, 3136 int *idx, 3137 struct netdev_hw_addr_list *list) 3138 { 3139 struct netdev_hw_addr *ha; 3140 int err; 3141 u32 portid, seq; 3142 3143 portid = NETLINK_CB(cb->skb).portid; 3144 seq = cb->nlh->nlmsg_seq; 3145 3146 list_for_each_entry(ha, &list->list, list) { 3147 if (*idx < cb->args[2]) 3148 goto skip; 3149 3150 err = nlmsg_populate_fdb_fill(skb, dev, ha->addr, 0, 3151 portid, seq, 3152 RTM_NEWNEIGH, NTF_SELF, 3153 NLM_F_MULTI, NUD_PERMANENT); 3154 if (err < 0) 3155 return err; 3156 skip: 3157 *idx += 1; 3158 } 3159 return 0; 3160 } 3161 3162 /** 3163 * ndo_dflt_fdb_dump - default netdevice operation to dump an FDB table. 3164 * @nlh: netlink message header 3165 * @dev: netdevice 3166 * 3167 * Default netdevice operation to dump the existing unicast address list. 3168 * Returns number of addresses from list put in skb. 3169 */ 3170 int ndo_dflt_fdb_dump(struct sk_buff *skb, 3171 struct netlink_callback *cb, 3172 struct net_device *dev, 3173 struct net_device *filter_dev, 3174 int *idx) 3175 { 3176 int err; 3177 3178 netif_addr_lock_bh(dev); 3179 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->uc); 3180 if (err) 3181 goto out; 3182 err = nlmsg_populate_fdb(skb, cb, dev, idx, &dev->mc); 3183 out: 3184 netif_addr_unlock_bh(dev); 3185 return err; 3186 } 3187 EXPORT_SYMBOL(ndo_dflt_fdb_dump); 3188 3189 static int rtnl_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb) 3190 { 3191 struct net_device *dev; 3192 struct nlattr *tb[IFLA_MAX+1]; 3193 struct net_device *br_dev = NULL; 3194 const struct net_device_ops *ops = NULL; 3195 const struct net_device_ops *cops = NULL; 3196 struct ifinfomsg *ifm = nlmsg_data(cb->nlh); 3197 struct net *net = sock_net(skb->sk); 3198 struct hlist_head *head; 3199 int brport_idx = 0; 3200 int br_idx = 0; 3201 int h, s_h; 3202 int idx = 0, s_idx; 3203 int err = 0; 3204 int fidx = 0; 3205 3206 if (nlmsg_parse(cb->nlh, sizeof(struct ifinfomsg), tb, IFLA_MAX, 3207 ifla_policy) == 0) { 3208 if (tb[IFLA_MASTER]) 3209 br_idx = nla_get_u32(tb[IFLA_MASTER]); 3210 } 3211 3212 brport_idx = ifm->ifi_index; 3213 3214 if (br_idx) { 3215 br_dev = __dev_get_by_index(net, br_idx); 3216 if (!br_dev) 3217 return -ENODEV; 3218 3219 ops = br_dev->netdev_ops; 3220 } 3221 3222 s_h = cb->args[0]; 3223 s_idx = cb->args[1]; 3224 3225 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 3226 idx = 0; 3227 head = &net->dev_index_head[h]; 3228 hlist_for_each_entry(dev, head, index_hlist) { 3229 3230 if (brport_idx && (dev->ifindex != brport_idx)) 3231 continue; 3232 3233 if (!br_idx) { /* user did not specify a specific bridge */ 3234 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3235 br_dev = netdev_master_upper_dev_get(dev); 3236 cops = br_dev->netdev_ops; 3237 } 3238 } else { 3239 if (dev != br_dev && 3240 !(dev->priv_flags & IFF_BRIDGE_PORT)) 3241 continue; 3242 3243 if (br_dev != netdev_master_upper_dev_get(dev) && 3244 !(dev->priv_flags & IFF_EBRIDGE)) 3245 continue; 3246 cops = ops; 3247 } 3248 3249 if (idx < s_idx) 3250 goto cont; 3251 3252 if (dev->priv_flags & IFF_BRIDGE_PORT) { 3253 if (cops && cops->ndo_fdb_dump) { 3254 err = cops->ndo_fdb_dump(skb, cb, 3255 br_dev, dev, 3256 &fidx); 3257 if (err == -EMSGSIZE) 3258 goto out; 3259 } 3260 } 3261 3262 if (dev->netdev_ops->ndo_fdb_dump) 3263 err = dev->netdev_ops->ndo_fdb_dump(skb, cb, 3264 dev, NULL, 3265 &fidx); 3266 else 3267 err = ndo_dflt_fdb_dump(skb, cb, dev, NULL, 3268 &fidx); 3269 if (err == -EMSGSIZE) 3270 goto out; 3271 3272 cops = NULL; 3273 3274 /* reset fdb offset to 0 for rest of the interfaces */ 3275 cb->args[2] = 0; 3276 fidx = 0; 3277 cont: 3278 idx++; 3279 } 3280 } 3281 3282 out: 3283 cb->args[0] = h; 3284 cb->args[1] = idx; 3285 cb->args[2] = fidx; 3286 3287 return skb->len; 3288 } 3289 3290 static int brport_nla_put_flag(struct sk_buff *skb, u32 flags, u32 mask, 3291 unsigned int attrnum, unsigned int flag) 3292 { 3293 if (mask & flag) 3294 return nla_put_u8(skb, attrnum, !!(flags & flag)); 3295 return 0; 3296 } 3297 3298 int ndo_dflt_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq, 3299 struct net_device *dev, u16 mode, 3300 u32 flags, u32 mask, int nlflags, 3301 u32 filter_mask, 3302 int (*vlan_fill)(struct sk_buff *skb, 3303 struct net_device *dev, 3304 u32 filter_mask)) 3305 { 3306 struct nlmsghdr *nlh; 3307 struct ifinfomsg *ifm; 3308 struct nlattr *br_afspec; 3309 struct nlattr *protinfo; 3310 u8 operstate = netif_running(dev) ? dev->operstate : IF_OPER_DOWN; 3311 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3312 int err = 0; 3313 3314 nlh = nlmsg_put(skb, pid, seq, RTM_NEWLINK, sizeof(*ifm), nlflags); 3315 if (nlh == NULL) 3316 return -EMSGSIZE; 3317 3318 ifm = nlmsg_data(nlh); 3319 ifm->ifi_family = AF_BRIDGE; 3320 ifm->__ifi_pad = 0; 3321 ifm->ifi_type = dev->type; 3322 ifm->ifi_index = dev->ifindex; 3323 ifm->ifi_flags = dev_get_flags(dev); 3324 ifm->ifi_change = 0; 3325 3326 3327 if (nla_put_string(skb, IFLA_IFNAME, dev->name) || 3328 nla_put_u32(skb, IFLA_MTU, dev->mtu) || 3329 nla_put_u8(skb, IFLA_OPERSTATE, operstate) || 3330 (br_dev && 3331 nla_put_u32(skb, IFLA_MASTER, br_dev->ifindex)) || 3332 (dev->addr_len && 3333 nla_put(skb, IFLA_ADDRESS, dev->addr_len, dev->dev_addr)) || 3334 (dev->ifindex != dev_get_iflink(dev) && 3335 nla_put_u32(skb, IFLA_LINK, dev_get_iflink(dev)))) 3336 goto nla_put_failure; 3337 3338 br_afspec = nla_nest_start(skb, IFLA_AF_SPEC); 3339 if (!br_afspec) 3340 goto nla_put_failure; 3341 3342 if (nla_put_u16(skb, IFLA_BRIDGE_FLAGS, BRIDGE_FLAGS_SELF)) { 3343 nla_nest_cancel(skb, br_afspec); 3344 goto nla_put_failure; 3345 } 3346 3347 if (mode != BRIDGE_MODE_UNDEF) { 3348 if (nla_put_u16(skb, IFLA_BRIDGE_MODE, mode)) { 3349 nla_nest_cancel(skb, br_afspec); 3350 goto nla_put_failure; 3351 } 3352 } 3353 if (vlan_fill) { 3354 err = vlan_fill(skb, dev, filter_mask); 3355 if (err) { 3356 nla_nest_cancel(skb, br_afspec); 3357 goto nla_put_failure; 3358 } 3359 } 3360 nla_nest_end(skb, br_afspec); 3361 3362 protinfo = nla_nest_start(skb, IFLA_PROTINFO | NLA_F_NESTED); 3363 if (!protinfo) 3364 goto nla_put_failure; 3365 3366 if (brport_nla_put_flag(skb, flags, mask, 3367 IFLA_BRPORT_MODE, BR_HAIRPIN_MODE) || 3368 brport_nla_put_flag(skb, flags, mask, 3369 IFLA_BRPORT_GUARD, BR_BPDU_GUARD) || 3370 brport_nla_put_flag(skb, flags, mask, 3371 IFLA_BRPORT_FAST_LEAVE, 3372 BR_MULTICAST_FAST_LEAVE) || 3373 brport_nla_put_flag(skb, flags, mask, 3374 IFLA_BRPORT_PROTECT, BR_ROOT_BLOCK) || 3375 brport_nla_put_flag(skb, flags, mask, 3376 IFLA_BRPORT_LEARNING, BR_LEARNING) || 3377 brport_nla_put_flag(skb, flags, mask, 3378 IFLA_BRPORT_LEARNING_SYNC, BR_LEARNING_SYNC) || 3379 brport_nla_put_flag(skb, flags, mask, 3380 IFLA_BRPORT_UNICAST_FLOOD, BR_FLOOD) || 3381 brport_nla_put_flag(skb, flags, mask, 3382 IFLA_BRPORT_PROXYARP, BR_PROXYARP)) { 3383 nla_nest_cancel(skb, protinfo); 3384 goto nla_put_failure; 3385 } 3386 3387 nla_nest_end(skb, protinfo); 3388 3389 nlmsg_end(skb, nlh); 3390 return 0; 3391 nla_put_failure: 3392 nlmsg_cancel(skb, nlh); 3393 return err ? err : -EMSGSIZE; 3394 } 3395 EXPORT_SYMBOL_GPL(ndo_dflt_bridge_getlink); 3396 3397 static int rtnl_bridge_getlink(struct sk_buff *skb, struct netlink_callback *cb) 3398 { 3399 struct net *net = sock_net(skb->sk); 3400 struct net_device *dev; 3401 int idx = 0; 3402 u32 portid = NETLINK_CB(cb->skb).portid; 3403 u32 seq = cb->nlh->nlmsg_seq; 3404 u32 filter_mask = 0; 3405 int err; 3406 3407 if (nlmsg_len(cb->nlh) > sizeof(struct ifinfomsg)) { 3408 struct nlattr *extfilt; 3409 3410 extfilt = nlmsg_find_attr(cb->nlh, sizeof(struct ifinfomsg), 3411 IFLA_EXT_MASK); 3412 if (extfilt) { 3413 if (nla_len(extfilt) < sizeof(filter_mask)) 3414 return -EINVAL; 3415 3416 filter_mask = nla_get_u32(extfilt); 3417 } 3418 } 3419 3420 rcu_read_lock(); 3421 for_each_netdev_rcu(net, dev) { 3422 const struct net_device_ops *ops = dev->netdev_ops; 3423 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3424 3425 if (br_dev && br_dev->netdev_ops->ndo_bridge_getlink) { 3426 if (idx >= cb->args[0]) { 3427 err = br_dev->netdev_ops->ndo_bridge_getlink( 3428 skb, portid, seq, dev, 3429 filter_mask, NLM_F_MULTI); 3430 if (err < 0 && err != -EOPNOTSUPP) 3431 break; 3432 } 3433 idx++; 3434 } 3435 3436 if (ops->ndo_bridge_getlink) { 3437 if (idx >= cb->args[0]) { 3438 err = ops->ndo_bridge_getlink(skb, portid, 3439 seq, dev, 3440 filter_mask, 3441 NLM_F_MULTI); 3442 if (err < 0 && err != -EOPNOTSUPP) 3443 break; 3444 } 3445 idx++; 3446 } 3447 } 3448 rcu_read_unlock(); 3449 cb->args[0] = idx; 3450 3451 return skb->len; 3452 } 3453 3454 static inline size_t bridge_nlmsg_size(void) 3455 { 3456 return NLMSG_ALIGN(sizeof(struct ifinfomsg)) 3457 + nla_total_size(IFNAMSIZ) /* IFLA_IFNAME */ 3458 + nla_total_size(MAX_ADDR_LEN) /* IFLA_ADDRESS */ 3459 + nla_total_size(sizeof(u32)) /* IFLA_MASTER */ 3460 + nla_total_size(sizeof(u32)) /* IFLA_MTU */ 3461 + nla_total_size(sizeof(u32)) /* IFLA_LINK */ 3462 + nla_total_size(sizeof(u32)) /* IFLA_OPERSTATE */ 3463 + nla_total_size(sizeof(u8)) /* IFLA_PROTINFO */ 3464 + nla_total_size(sizeof(struct nlattr)) /* IFLA_AF_SPEC */ 3465 + nla_total_size(sizeof(u16)) /* IFLA_BRIDGE_FLAGS */ 3466 + nla_total_size(sizeof(u16)); /* IFLA_BRIDGE_MODE */ 3467 } 3468 3469 static int rtnl_bridge_notify(struct net_device *dev) 3470 { 3471 struct net *net = dev_net(dev); 3472 struct sk_buff *skb; 3473 int err = -EOPNOTSUPP; 3474 3475 if (!dev->netdev_ops->ndo_bridge_getlink) 3476 return 0; 3477 3478 skb = nlmsg_new(bridge_nlmsg_size(), GFP_ATOMIC); 3479 if (!skb) { 3480 err = -ENOMEM; 3481 goto errout; 3482 } 3483 3484 err = dev->netdev_ops->ndo_bridge_getlink(skb, 0, 0, dev, 0, 0); 3485 if (err < 0) 3486 goto errout; 3487 3488 if (!skb->len) 3489 goto errout; 3490 3491 rtnl_notify(skb, net, 0, RTNLGRP_LINK, NULL, GFP_ATOMIC); 3492 return 0; 3493 errout: 3494 WARN_ON(err == -EMSGSIZE); 3495 kfree_skb(skb); 3496 if (err) 3497 rtnl_set_sk_err(net, RTNLGRP_LINK, err); 3498 return err; 3499 } 3500 3501 static int rtnl_bridge_setlink(struct sk_buff *skb, struct nlmsghdr *nlh) 3502 { 3503 struct net *net = sock_net(skb->sk); 3504 struct ifinfomsg *ifm; 3505 struct net_device *dev; 3506 struct nlattr *br_spec, *attr = NULL; 3507 int rem, err = -EOPNOTSUPP; 3508 u16 flags = 0; 3509 bool have_flags = false; 3510 3511 if (nlmsg_len(nlh) < sizeof(*ifm)) 3512 return -EINVAL; 3513 3514 ifm = nlmsg_data(nlh); 3515 if (ifm->ifi_family != AF_BRIDGE) 3516 return -EPFNOSUPPORT; 3517 3518 dev = __dev_get_by_index(net, ifm->ifi_index); 3519 if (!dev) { 3520 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3521 return -ENODEV; 3522 } 3523 3524 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3525 if (br_spec) { 3526 nla_for_each_nested(attr, br_spec, rem) { 3527 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3528 if (nla_len(attr) < sizeof(flags)) 3529 return -EINVAL; 3530 3531 have_flags = true; 3532 flags = nla_get_u16(attr); 3533 break; 3534 } 3535 } 3536 } 3537 3538 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3539 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3540 3541 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_setlink) { 3542 err = -EOPNOTSUPP; 3543 goto out; 3544 } 3545 3546 err = br_dev->netdev_ops->ndo_bridge_setlink(dev, nlh, flags); 3547 if (err) 3548 goto out; 3549 3550 flags &= ~BRIDGE_FLAGS_MASTER; 3551 } 3552 3553 if ((flags & BRIDGE_FLAGS_SELF)) { 3554 if (!dev->netdev_ops->ndo_bridge_setlink) 3555 err = -EOPNOTSUPP; 3556 else 3557 err = dev->netdev_ops->ndo_bridge_setlink(dev, nlh, 3558 flags); 3559 if (!err) { 3560 flags &= ~BRIDGE_FLAGS_SELF; 3561 3562 /* Generate event to notify upper layer of bridge 3563 * change 3564 */ 3565 err = rtnl_bridge_notify(dev); 3566 } 3567 } 3568 3569 if (have_flags) 3570 memcpy(nla_data(attr), &flags, sizeof(flags)); 3571 out: 3572 return err; 3573 } 3574 3575 static int rtnl_bridge_dellink(struct sk_buff *skb, struct nlmsghdr *nlh) 3576 { 3577 struct net *net = sock_net(skb->sk); 3578 struct ifinfomsg *ifm; 3579 struct net_device *dev; 3580 struct nlattr *br_spec, *attr = NULL; 3581 int rem, err = -EOPNOTSUPP; 3582 u16 flags = 0; 3583 bool have_flags = false; 3584 3585 if (nlmsg_len(nlh) < sizeof(*ifm)) 3586 return -EINVAL; 3587 3588 ifm = nlmsg_data(nlh); 3589 if (ifm->ifi_family != AF_BRIDGE) 3590 return -EPFNOSUPPORT; 3591 3592 dev = __dev_get_by_index(net, ifm->ifi_index); 3593 if (!dev) { 3594 pr_info("PF_BRIDGE: RTM_SETLINK with unknown ifindex\n"); 3595 return -ENODEV; 3596 } 3597 3598 br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC); 3599 if (br_spec) { 3600 nla_for_each_nested(attr, br_spec, rem) { 3601 if (nla_type(attr) == IFLA_BRIDGE_FLAGS) { 3602 if (nla_len(attr) < sizeof(flags)) 3603 return -EINVAL; 3604 3605 have_flags = true; 3606 flags = nla_get_u16(attr); 3607 break; 3608 } 3609 } 3610 } 3611 3612 if (!flags || (flags & BRIDGE_FLAGS_MASTER)) { 3613 struct net_device *br_dev = netdev_master_upper_dev_get(dev); 3614 3615 if (!br_dev || !br_dev->netdev_ops->ndo_bridge_dellink) { 3616 err = -EOPNOTSUPP; 3617 goto out; 3618 } 3619 3620 err = br_dev->netdev_ops->ndo_bridge_dellink(dev, nlh, flags); 3621 if (err) 3622 goto out; 3623 3624 flags &= ~BRIDGE_FLAGS_MASTER; 3625 } 3626 3627 if ((flags & BRIDGE_FLAGS_SELF)) { 3628 if (!dev->netdev_ops->ndo_bridge_dellink) 3629 err = -EOPNOTSUPP; 3630 else 3631 err = dev->netdev_ops->ndo_bridge_dellink(dev, nlh, 3632 flags); 3633 3634 if (!err) { 3635 flags &= ~BRIDGE_FLAGS_SELF; 3636 3637 /* Generate event to notify upper layer of bridge 3638 * change 3639 */ 3640 err = rtnl_bridge_notify(dev); 3641 } 3642 } 3643 3644 if (have_flags) 3645 memcpy(nla_data(attr), &flags, sizeof(flags)); 3646 out: 3647 return err; 3648 } 3649 3650 static bool stats_attr_valid(unsigned int mask, int attrid, int idxattr) 3651 { 3652 return (mask & IFLA_STATS_FILTER_BIT(attrid)) && 3653 (!idxattr || idxattr == attrid); 3654 } 3655 3656 #define IFLA_OFFLOAD_XSTATS_FIRST (IFLA_OFFLOAD_XSTATS_UNSPEC + 1) 3657 static int rtnl_get_offload_stats_attr_size(int attr_id) 3658 { 3659 switch (attr_id) { 3660 case IFLA_OFFLOAD_XSTATS_CPU_HIT: 3661 return sizeof(struct rtnl_link_stats64); 3662 } 3663 3664 return 0; 3665 } 3666 3667 static int rtnl_get_offload_stats(struct sk_buff *skb, struct net_device *dev, 3668 int *prividx) 3669 { 3670 struct nlattr *attr = NULL; 3671 int attr_id, size; 3672 void *attr_data; 3673 int err; 3674 3675 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3676 dev->netdev_ops->ndo_get_offload_stats)) 3677 return -ENODATA; 3678 3679 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3680 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3681 if (attr_id < *prividx) 3682 continue; 3683 3684 size = rtnl_get_offload_stats_attr_size(attr_id); 3685 if (!size) 3686 continue; 3687 3688 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3689 continue; 3690 3691 attr = nla_reserve_64bit(skb, attr_id, size, 3692 IFLA_OFFLOAD_XSTATS_UNSPEC); 3693 if (!attr) 3694 goto nla_put_failure; 3695 3696 attr_data = nla_data(attr); 3697 memset(attr_data, 0, size); 3698 err = dev->netdev_ops->ndo_get_offload_stats(attr_id, dev, 3699 attr_data); 3700 if (err) 3701 goto get_offload_stats_failure; 3702 } 3703 3704 if (!attr) 3705 return -ENODATA; 3706 3707 *prividx = 0; 3708 return 0; 3709 3710 nla_put_failure: 3711 err = -EMSGSIZE; 3712 get_offload_stats_failure: 3713 *prividx = attr_id; 3714 return err; 3715 } 3716 3717 static int rtnl_get_offload_stats_size(const struct net_device *dev) 3718 { 3719 int nla_size = 0; 3720 int attr_id; 3721 int size; 3722 3723 if (!(dev->netdev_ops && dev->netdev_ops->ndo_has_offload_stats && 3724 dev->netdev_ops->ndo_get_offload_stats)) 3725 return 0; 3726 3727 for (attr_id = IFLA_OFFLOAD_XSTATS_FIRST; 3728 attr_id <= IFLA_OFFLOAD_XSTATS_MAX; attr_id++) { 3729 if (!dev->netdev_ops->ndo_has_offload_stats(dev, attr_id)) 3730 continue; 3731 size = rtnl_get_offload_stats_attr_size(attr_id); 3732 nla_size += nla_total_size_64bit(size); 3733 } 3734 3735 if (nla_size != 0) 3736 nla_size += nla_total_size(0); 3737 3738 return nla_size; 3739 } 3740 3741 static int rtnl_fill_statsinfo(struct sk_buff *skb, struct net_device *dev, 3742 int type, u32 pid, u32 seq, u32 change, 3743 unsigned int flags, unsigned int filter_mask, 3744 int *idxattr, int *prividx) 3745 { 3746 struct if_stats_msg *ifsm; 3747 struct nlmsghdr *nlh; 3748 struct nlattr *attr; 3749 int s_prividx = *prividx; 3750 int err; 3751 3752 ASSERT_RTNL(); 3753 3754 nlh = nlmsg_put(skb, pid, seq, type, sizeof(*ifsm), flags); 3755 if (!nlh) 3756 return -EMSGSIZE; 3757 3758 ifsm = nlmsg_data(nlh); 3759 ifsm->ifindex = dev->ifindex; 3760 ifsm->filter_mask = filter_mask; 3761 3762 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, *idxattr)) { 3763 struct rtnl_link_stats64 *sp; 3764 3765 attr = nla_reserve_64bit(skb, IFLA_STATS_LINK_64, 3766 sizeof(struct rtnl_link_stats64), 3767 IFLA_STATS_UNSPEC); 3768 if (!attr) 3769 goto nla_put_failure; 3770 3771 sp = nla_data(attr); 3772 dev_get_stats(dev, sp); 3773 } 3774 3775 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, *idxattr)) { 3776 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3777 3778 if (ops && ops->fill_linkxstats) { 3779 *idxattr = IFLA_STATS_LINK_XSTATS; 3780 attr = nla_nest_start(skb, 3781 IFLA_STATS_LINK_XSTATS); 3782 if (!attr) 3783 goto nla_put_failure; 3784 3785 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3786 nla_nest_end(skb, attr); 3787 if (err) 3788 goto nla_put_failure; 3789 *idxattr = 0; 3790 } 3791 } 3792 3793 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 3794 *idxattr)) { 3795 const struct rtnl_link_ops *ops = NULL; 3796 const struct net_device *master; 3797 3798 master = netdev_master_upper_dev_get(dev); 3799 if (master) 3800 ops = master->rtnl_link_ops; 3801 if (ops && ops->fill_linkxstats) { 3802 *idxattr = IFLA_STATS_LINK_XSTATS_SLAVE; 3803 attr = nla_nest_start(skb, 3804 IFLA_STATS_LINK_XSTATS_SLAVE); 3805 if (!attr) 3806 goto nla_put_failure; 3807 3808 err = ops->fill_linkxstats(skb, dev, prividx, *idxattr); 3809 nla_nest_end(skb, attr); 3810 if (err) 3811 goto nla_put_failure; 3812 *idxattr = 0; 3813 } 3814 } 3815 3816 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 3817 *idxattr)) { 3818 *idxattr = IFLA_STATS_LINK_OFFLOAD_XSTATS; 3819 attr = nla_nest_start(skb, IFLA_STATS_LINK_OFFLOAD_XSTATS); 3820 if (!attr) 3821 goto nla_put_failure; 3822 3823 err = rtnl_get_offload_stats(skb, dev, prividx); 3824 if (err == -ENODATA) 3825 nla_nest_cancel(skb, attr); 3826 else 3827 nla_nest_end(skb, attr); 3828 3829 if (err && err != -ENODATA) 3830 goto nla_put_failure; 3831 *idxattr = 0; 3832 } 3833 3834 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, *idxattr)) { 3835 struct rtnl_af_ops *af_ops; 3836 3837 *idxattr = IFLA_STATS_AF_SPEC; 3838 attr = nla_nest_start(skb, IFLA_STATS_AF_SPEC); 3839 if (!attr) 3840 goto nla_put_failure; 3841 3842 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3843 if (af_ops->fill_stats_af) { 3844 struct nlattr *af; 3845 int err; 3846 3847 af = nla_nest_start(skb, af_ops->family); 3848 if (!af) 3849 goto nla_put_failure; 3850 3851 err = af_ops->fill_stats_af(skb, dev); 3852 3853 if (err == -ENODATA) 3854 nla_nest_cancel(skb, af); 3855 else if (err < 0) 3856 goto nla_put_failure; 3857 3858 nla_nest_end(skb, af); 3859 } 3860 } 3861 3862 nla_nest_end(skb, attr); 3863 3864 *idxattr = 0; 3865 } 3866 3867 nlmsg_end(skb, nlh); 3868 3869 return 0; 3870 3871 nla_put_failure: 3872 /* not a multi message or no progress mean a real error */ 3873 if (!(flags & NLM_F_MULTI) || s_prividx == *prividx) 3874 nlmsg_cancel(skb, nlh); 3875 else 3876 nlmsg_end(skb, nlh); 3877 3878 return -EMSGSIZE; 3879 } 3880 3881 static size_t if_nlmsg_stats_size(const struct net_device *dev, 3882 u32 filter_mask) 3883 { 3884 size_t size = 0; 3885 3886 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_64, 0)) 3887 size += nla_total_size_64bit(sizeof(struct rtnl_link_stats64)); 3888 3889 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS, 0)) { 3890 const struct rtnl_link_ops *ops = dev->rtnl_link_ops; 3891 int attr = IFLA_STATS_LINK_XSTATS; 3892 3893 if (ops && ops->get_linkxstats_size) { 3894 size += nla_total_size(ops->get_linkxstats_size(dev, 3895 attr)); 3896 /* for IFLA_STATS_LINK_XSTATS */ 3897 size += nla_total_size(0); 3898 } 3899 } 3900 3901 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_XSTATS_SLAVE, 0)) { 3902 struct net_device *_dev = (struct net_device *)dev; 3903 const struct rtnl_link_ops *ops = NULL; 3904 const struct net_device *master; 3905 3906 /* netdev_master_upper_dev_get can't take const */ 3907 master = netdev_master_upper_dev_get(_dev); 3908 if (master) 3909 ops = master->rtnl_link_ops; 3910 if (ops && ops->get_linkxstats_size) { 3911 int attr = IFLA_STATS_LINK_XSTATS_SLAVE; 3912 3913 size += nla_total_size(ops->get_linkxstats_size(dev, 3914 attr)); 3915 /* for IFLA_STATS_LINK_XSTATS_SLAVE */ 3916 size += nla_total_size(0); 3917 } 3918 } 3919 3920 if (stats_attr_valid(filter_mask, IFLA_STATS_LINK_OFFLOAD_XSTATS, 0)) 3921 size += rtnl_get_offload_stats_size(dev); 3922 3923 if (stats_attr_valid(filter_mask, IFLA_STATS_AF_SPEC, 0)) { 3924 struct rtnl_af_ops *af_ops; 3925 3926 /* for IFLA_STATS_AF_SPEC */ 3927 size += nla_total_size(0); 3928 3929 list_for_each_entry(af_ops, &rtnl_af_ops, list) { 3930 if (af_ops->get_stats_af_size) { 3931 size += nla_total_size( 3932 af_ops->get_stats_af_size(dev)); 3933 3934 /* for AF_* */ 3935 size += nla_total_size(0); 3936 } 3937 } 3938 } 3939 3940 return size; 3941 } 3942 3943 static int rtnl_stats_get(struct sk_buff *skb, struct nlmsghdr *nlh) 3944 { 3945 struct net *net = sock_net(skb->sk); 3946 struct net_device *dev = NULL; 3947 int idxattr = 0, prividx = 0; 3948 struct if_stats_msg *ifsm; 3949 struct sk_buff *nskb; 3950 u32 filter_mask; 3951 int err; 3952 3953 if (nlmsg_len(nlh) < sizeof(*ifsm)) 3954 return -EINVAL; 3955 3956 ifsm = nlmsg_data(nlh); 3957 if (ifsm->ifindex > 0) 3958 dev = __dev_get_by_index(net, ifsm->ifindex); 3959 else 3960 return -EINVAL; 3961 3962 if (!dev) 3963 return -ENODEV; 3964 3965 filter_mask = ifsm->filter_mask; 3966 if (!filter_mask) 3967 return -EINVAL; 3968 3969 nskb = nlmsg_new(if_nlmsg_stats_size(dev, filter_mask), GFP_KERNEL); 3970 if (!nskb) 3971 return -ENOBUFS; 3972 3973 err = rtnl_fill_statsinfo(nskb, dev, RTM_NEWSTATS, 3974 NETLINK_CB(skb).portid, nlh->nlmsg_seq, 0, 3975 0, filter_mask, &idxattr, &prividx); 3976 if (err < 0) { 3977 /* -EMSGSIZE implies BUG in if_nlmsg_stats_size */ 3978 WARN_ON(err == -EMSGSIZE); 3979 kfree_skb(nskb); 3980 } else { 3981 err = rtnl_unicast(nskb, net, NETLINK_CB(skb).portid); 3982 } 3983 3984 return err; 3985 } 3986 3987 static int rtnl_stats_dump(struct sk_buff *skb, struct netlink_callback *cb) 3988 { 3989 int h, s_h, err, s_idx, s_idxattr, s_prividx; 3990 struct net *net = sock_net(skb->sk); 3991 unsigned int flags = NLM_F_MULTI; 3992 struct if_stats_msg *ifsm; 3993 struct hlist_head *head; 3994 struct net_device *dev; 3995 u32 filter_mask = 0; 3996 int idx = 0; 3997 3998 s_h = cb->args[0]; 3999 s_idx = cb->args[1]; 4000 s_idxattr = cb->args[2]; 4001 s_prividx = cb->args[3]; 4002 4003 cb->seq = net->dev_base_seq; 4004 4005 if (nlmsg_len(cb->nlh) < sizeof(*ifsm)) 4006 return -EINVAL; 4007 4008 ifsm = nlmsg_data(cb->nlh); 4009 filter_mask = ifsm->filter_mask; 4010 if (!filter_mask) 4011 return -EINVAL; 4012 4013 for (h = s_h; h < NETDEV_HASHENTRIES; h++, s_idx = 0) { 4014 idx = 0; 4015 head = &net->dev_index_head[h]; 4016 hlist_for_each_entry(dev, head, index_hlist) { 4017 if (idx < s_idx) 4018 goto cont; 4019 err = rtnl_fill_statsinfo(skb, dev, RTM_NEWSTATS, 4020 NETLINK_CB(cb->skb).portid, 4021 cb->nlh->nlmsg_seq, 0, 4022 flags, filter_mask, 4023 &s_idxattr, &s_prividx); 4024 /* If we ran out of room on the first message, 4025 * we're in trouble 4026 */ 4027 WARN_ON((err == -EMSGSIZE) && (skb->len == 0)); 4028 4029 if (err < 0) 4030 goto out; 4031 s_prividx = 0; 4032 s_idxattr = 0; 4033 nl_dump_check_consistent(cb, nlmsg_hdr(skb)); 4034 cont: 4035 idx++; 4036 } 4037 } 4038 out: 4039 cb->args[3] = s_prividx; 4040 cb->args[2] = s_idxattr; 4041 cb->args[1] = idx; 4042 cb->args[0] = h; 4043 4044 return skb->len; 4045 } 4046 4047 /* Process one rtnetlink message. */ 4048 4049 static int rtnetlink_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) 4050 { 4051 struct net *net = sock_net(skb->sk); 4052 rtnl_doit_func doit; 4053 int kind; 4054 int family; 4055 int type; 4056 int err; 4057 4058 type = nlh->nlmsg_type; 4059 if (type > RTM_MAX) 4060 return -EOPNOTSUPP; 4061 4062 type -= RTM_BASE; 4063 4064 /* All the messages must have at least 1 byte length */ 4065 if (nlmsg_len(nlh) < sizeof(struct rtgenmsg)) 4066 return 0; 4067 4068 family = ((struct rtgenmsg *)nlmsg_data(nlh))->rtgen_family; 4069 kind = type&3; 4070 4071 if (kind != 2 && !netlink_net_capable(skb, CAP_NET_ADMIN)) 4072 return -EPERM; 4073 4074 if (kind == 2 && nlh->nlmsg_flags&NLM_F_DUMP) { 4075 struct sock *rtnl; 4076 rtnl_dumpit_func dumpit; 4077 rtnl_calcit_func calcit; 4078 u16 min_dump_alloc = 0; 4079 4080 dumpit = rtnl_get_dumpit(family, type); 4081 if (dumpit == NULL) 4082 return -EOPNOTSUPP; 4083 calcit = rtnl_get_calcit(family, type); 4084 if (calcit) 4085 min_dump_alloc = calcit(skb, nlh); 4086 4087 __rtnl_unlock(); 4088 rtnl = net->rtnl; 4089 { 4090 struct netlink_dump_control c = { 4091 .dump = dumpit, 4092 .min_dump_alloc = min_dump_alloc, 4093 }; 4094 err = netlink_dump_start(rtnl, skb, nlh, &c); 4095 } 4096 rtnl_lock(); 4097 return err; 4098 } 4099 4100 doit = rtnl_get_doit(family, type); 4101 if (doit == NULL) 4102 return -EOPNOTSUPP; 4103 4104 return doit(skb, nlh); 4105 } 4106 4107 static void rtnetlink_rcv(struct sk_buff *skb) 4108 { 4109 rtnl_lock(); 4110 netlink_rcv_skb(skb, &rtnetlink_rcv_msg); 4111 rtnl_unlock(); 4112 } 4113 4114 static int rtnetlink_event(struct notifier_block *this, unsigned long event, void *ptr) 4115 { 4116 struct net_device *dev = netdev_notifier_info_to_dev(ptr); 4117 4118 switch (event) { 4119 case NETDEV_UP: 4120 case NETDEV_DOWN: 4121 case NETDEV_PRE_UP: 4122 case NETDEV_POST_INIT: 4123 case NETDEV_REGISTER: 4124 case NETDEV_CHANGE: 4125 case NETDEV_PRE_TYPE_CHANGE: 4126 case NETDEV_GOING_DOWN: 4127 case NETDEV_UNREGISTER: 4128 case NETDEV_UNREGISTER_FINAL: 4129 case NETDEV_RELEASE: 4130 case NETDEV_JOIN: 4131 case NETDEV_BONDING_INFO: 4132 break; 4133 default: 4134 rtmsg_ifinfo(RTM_NEWLINK, dev, 0, GFP_KERNEL); 4135 break; 4136 } 4137 return NOTIFY_DONE; 4138 } 4139 4140 static struct notifier_block rtnetlink_dev_notifier = { 4141 .notifier_call = rtnetlink_event, 4142 }; 4143 4144 4145 static int __net_init rtnetlink_net_init(struct net *net) 4146 { 4147 struct sock *sk; 4148 struct netlink_kernel_cfg cfg = { 4149 .groups = RTNLGRP_MAX, 4150 .input = rtnetlink_rcv, 4151 .cb_mutex = &rtnl_mutex, 4152 .flags = NL_CFG_F_NONROOT_RECV, 4153 }; 4154 4155 sk = netlink_kernel_create(net, NETLINK_ROUTE, &cfg); 4156 if (!sk) 4157 return -ENOMEM; 4158 net->rtnl = sk; 4159 return 0; 4160 } 4161 4162 static void __net_exit rtnetlink_net_exit(struct net *net) 4163 { 4164 netlink_kernel_release(net->rtnl); 4165 net->rtnl = NULL; 4166 } 4167 4168 static struct pernet_operations rtnetlink_net_ops = { 4169 .init = rtnetlink_net_init, 4170 .exit = rtnetlink_net_exit, 4171 }; 4172 4173 void __init rtnetlink_init(void) 4174 { 4175 if (register_pernet_subsys(&rtnetlink_net_ops)) 4176 panic("rtnetlink_init: cannot initialize rtnetlink\n"); 4177 4178 register_netdevice_notifier(&rtnetlink_dev_notifier); 4179 4180 rtnl_register(PF_UNSPEC, RTM_GETLINK, rtnl_getlink, 4181 rtnl_dump_ifinfo, rtnl_calcit); 4182 rtnl_register(PF_UNSPEC, RTM_SETLINK, rtnl_setlink, NULL, NULL); 4183 rtnl_register(PF_UNSPEC, RTM_NEWLINK, rtnl_newlink, NULL, NULL); 4184 rtnl_register(PF_UNSPEC, RTM_DELLINK, rtnl_dellink, NULL, NULL); 4185 4186 rtnl_register(PF_UNSPEC, RTM_GETADDR, NULL, rtnl_dump_all, NULL); 4187 rtnl_register(PF_UNSPEC, RTM_GETROUTE, NULL, rtnl_dump_all, NULL); 4188 4189 rtnl_register(PF_BRIDGE, RTM_NEWNEIGH, rtnl_fdb_add, NULL, NULL); 4190 rtnl_register(PF_BRIDGE, RTM_DELNEIGH, rtnl_fdb_del, NULL, NULL); 4191 rtnl_register(PF_BRIDGE, RTM_GETNEIGH, NULL, rtnl_fdb_dump, NULL); 4192 4193 rtnl_register(PF_BRIDGE, RTM_GETLINK, NULL, rtnl_bridge_getlink, NULL); 4194 rtnl_register(PF_BRIDGE, RTM_DELLINK, rtnl_bridge_dellink, NULL, NULL); 4195 rtnl_register(PF_BRIDGE, RTM_SETLINK, rtnl_bridge_setlink, NULL, NULL); 4196 4197 rtnl_register(PF_UNSPEC, RTM_GETSTATS, rtnl_stats_get, rtnl_stats_dump, 4198 NULL); 4199 } 4200