1 // SPDX-License-Identifier: GPL-2.0 2 #include <linux/kmod.h> 3 #include <linux/netdevice.h> 4 #include <linux/inetdevice.h> 5 #include <linux/etherdevice.h> 6 #include <linux/rtnetlink.h> 7 #include <linux/net_tstamp.h> 8 #include <linux/phylib_stubs.h> 9 #include <linux/ptp_clock_kernel.h> 10 #include <linux/wireless.h> 11 #include <linux/if_bridge.h> 12 #include <net/dsa_stubs.h> 13 #include <net/netdev_lock.h> 14 #include <net/wext.h> 15 16 #include "dev.h" 17 18 /* 19 * Map an interface index to its name (SIOCGIFNAME) 20 */ 21 22 /* 23 * We need this ioctl for efficient implementation of the 24 * if_indextoname() function required by the IPv6 API. Without 25 * it, we would have to search all the interfaces to find a 26 * match. --pb 27 */ 28 29 static int dev_ifname(struct net *net, struct ifreq *ifr) 30 { 31 ifr->ifr_name[IFNAMSIZ-1] = 0; 32 return netdev_get_name(net, ifr->ifr_name, ifr->ifr_ifindex); 33 } 34 35 /* 36 * Perform a SIOCGIFCONF call. This structure will change 37 * size eventually, and there is nothing I can do about it. 38 * Thus we will need a 'compatibility mode'. 39 */ 40 int dev_ifconf(struct net *net, struct ifconf __user *uifc) 41 { 42 struct net_device *dev; 43 void __user *pos; 44 size_t size; 45 int len, total = 0, done; 46 47 /* both the ifconf and the ifreq structures are slightly different */ 48 if (in_compat_syscall()) { 49 struct compat_ifconf ifc32; 50 51 if (copy_from_user(&ifc32, uifc, sizeof(struct compat_ifconf))) 52 return -EFAULT; 53 54 pos = compat_ptr(ifc32.ifcbuf); 55 len = ifc32.ifc_len; 56 size = sizeof(struct compat_ifreq); 57 } else { 58 struct ifconf ifc; 59 60 if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) 61 return -EFAULT; 62 63 pos = ifc.ifc_buf; 64 len = ifc.ifc_len; 65 size = sizeof(struct ifreq); 66 } 67 68 /* Loop over the interfaces, and write an info block for each. */ 69 rtnl_net_lock(net); 70 for_each_netdev(net, dev) { 71 if (!pos) 72 done = inet_gifconf(dev, NULL, 0, size); 73 else 74 done = inet_gifconf(dev, pos + total, 75 len - total, size); 76 if (done < 0) { 77 rtnl_net_unlock(net); 78 return -EFAULT; 79 } 80 total += done; 81 } 82 rtnl_net_unlock(net); 83 84 return put_user(total, &uifc->ifc_len); 85 } 86 87 static int dev_getifmap(struct net_device *dev, struct ifreq *ifr) 88 { 89 struct ifmap *ifmap = &ifr->ifr_map; 90 91 if (in_compat_syscall()) { 92 struct compat_ifmap *cifmap = (struct compat_ifmap *)ifmap; 93 94 cifmap->mem_start = dev->mem_start; 95 cifmap->mem_end = dev->mem_end; 96 cifmap->base_addr = dev->base_addr; 97 cifmap->irq = dev->irq; 98 cifmap->dma = dev->dma; 99 cifmap->port = dev->if_port; 100 101 return 0; 102 } 103 104 ifmap->mem_start = dev->mem_start; 105 ifmap->mem_end = dev->mem_end; 106 ifmap->base_addr = dev->base_addr; 107 ifmap->irq = dev->irq; 108 ifmap->dma = dev->dma; 109 ifmap->port = dev->if_port; 110 111 return 0; 112 } 113 114 static int netif_setifmap(struct net_device *dev, struct ifreq *ifr) 115 { 116 struct compat_ifmap *cifmap = (struct compat_ifmap *)&ifr->ifr_map; 117 118 if (!dev->netdev_ops->ndo_set_config) 119 return -EOPNOTSUPP; 120 121 if (in_compat_syscall()) { 122 struct ifmap ifmap = { 123 .mem_start = cifmap->mem_start, 124 .mem_end = cifmap->mem_end, 125 .base_addr = cifmap->base_addr, 126 .irq = cifmap->irq, 127 .dma = cifmap->dma, 128 .port = cifmap->port, 129 }; 130 131 return dev->netdev_ops->ndo_set_config(dev, &ifmap); 132 } 133 134 return dev->netdev_ops->ndo_set_config(dev, &ifr->ifr_map); 135 } 136 137 /* 138 * Perform the SIOCxIFxxx calls, inside rcu_read_lock() 139 */ 140 static int dev_ifsioc_locked(struct net *net, struct ifreq *ifr, unsigned int cmd) 141 { 142 int err; 143 struct net_device *dev = dev_get_by_name_rcu(net, ifr->ifr_name); 144 145 if (!dev) 146 return -ENODEV; 147 148 switch (cmd) { 149 case SIOCGIFFLAGS: /* Get interface flags */ 150 ifr->ifr_flags = (short)netif_get_flags(dev); 151 return 0; 152 153 case SIOCGIFMETRIC: /* Get the metric on the interface 154 (currently unused) */ 155 ifr->ifr_metric = 0; 156 return 0; 157 158 case SIOCGIFMTU: /* Get the MTU of a device */ 159 ifr->ifr_mtu = dev->mtu; 160 return 0; 161 162 case SIOCGIFSLAVE: 163 err = -EINVAL; 164 break; 165 166 case SIOCGIFMAP: 167 return dev_getifmap(dev, ifr); 168 169 case SIOCGIFINDEX: 170 ifr->ifr_ifindex = dev->ifindex; 171 return 0; 172 173 case SIOCGIFTXQLEN: 174 ifr->ifr_qlen = dev->tx_queue_len; 175 return 0; 176 177 default: 178 /* dev_ioctl() should ensure this case 179 * is never reached 180 */ 181 WARN_ON(1); 182 err = -ENOTTY; 183 break; 184 185 } 186 return err; 187 } 188 189 int net_hwtstamp_validate(const struct kernel_hwtstamp_config *cfg) 190 { 191 enum hwtstamp_tx_types tx_type; 192 enum hwtstamp_rx_filters rx_filter; 193 int tx_type_valid = 0; 194 int rx_filter_valid = 0; 195 196 if (cfg->flags & ~HWTSTAMP_FLAG_MASK) 197 return -EINVAL; 198 199 tx_type = cfg->tx_type; 200 rx_filter = cfg->rx_filter; 201 202 switch (tx_type) { 203 case HWTSTAMP_TX_OFF: 204 case HWTSTAMP_TX_ON: 205 case HWTSTAMP_TX_ONESTEP_SYNC: 206 case HWTSTAMP_TX_ONESTEP_P2P: 207 tx_type_valid = 1; 208 break; 209 case __HWTSTAMP_TX_CNT: 210 /* not a real value */ 211 break; 212 } 213 214 switch (rx_filter) { 215 case HWTSTAMP_FILTER_NONE: 216 case HWTSTAMP_FILTER_ALL: 217 case HWTSTAMP_FILTER_SOME: 218 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT: 219 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC: 220 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ: 221 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT: 222 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC: 223 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ: 224 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT: 225 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC: 226 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ: 227 case HWTSTAMP_FILTER_PTP_V2_EVENT: 228 case HWTSTAMP_FILTER_PTP_V2_SYNC: 229 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ: 230 case HWTSTAMP_FILTER_NTP_ALL: 231 rx_filter_valid = 1; 232 break; 233 case __HWTSTAMP_FILTER_CNT: 234 /* not a real value */ 235 break; 236 } 237 238 if (!tx_type_valid || !rx_filter_valid) 239 return -ERANGE; 240 241 return 0; 242 } 243 244 /** 245 * dev_get_hwtstamp_phylib() - Get hardware timestamping settings of NIC 246 * or of attached phylib PHY 247 * @dev: Network device 248 * @cfg: Timestamping configuration structure 249 * 250 * Helper for calling the default hardware provider timestamping. 251 * 252 * Note: phy_mii_ioctl() only handles SIOCSHWTSTAMP (not SIOCGHWTSTAMP), but 253 * phydev->mii_ts has both hwtstamp_get() and hwtstamp_set() methods. So this 254 * will return -EOPNOTSUPP for phylib only if hwtstamp_get() is not 255 * implemented for now, which is still more accurate than letting the netdev 256 * handle the GET request. 257 */ 258 int dev_get_hwtstamp_phylib(struct net_device *dev, 259 struct kernel_hwtstamp_config *cfg) 260 { 261 struct hwtstamp_provider *hwprov; 262 263 hwprov = netdev_ops_lock_dereference(dev->hwprov, dev); 264 if (hwprov) { 265 cfg->qualifier = hwprov->desc.qualifier; 266 if (hwprov->source == HWTSTAMP_SOURCE_PHYLIB && 267 hwprov->phydev) 268 return phy_hwtstamp_get(hwprov->phydev, cfg); 269 270 if (hwprov->source == HWTSTAMP_SOURCE_NETDEV) 271 return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg); 272 273 return -EOPNOTSUPP; 274 } 275 276 if (phy_is_default_hwtstamp(dev->phydev)) 277 return phy_hwtstamp_get(dev->phydev, cfg); 278 279 if (!dev->netdev_ops->ndo_hwtstamp_get) 280 return -EOPNOTSUPP; 281 282 return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg); 283 } 284 285 static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr) 286 { 287 struct kernel_hwtstamp_config kernel_cfg = {}; 288 struct hwtstamp_config cfg; 289 int err; 290 291 if (!netif_device_present(dev)) 292 return -ENODEV; 293 294 kernel_cfg.ifr = ifr; 295 netdev_lock_ops(dev); 296 err = dev_get_hwtstamp_phylib(dev, &kernel_cfg); 297 netdev_unlock_ops(dev); 298 if (err) 299 return err; 300 301 /* If the request was resolved through an unconverted driver, omit 302 * the copy_to_user(), since the implementation has already done that 303 */ 304 if (!kernel_cfg.copied_to_user) { 305 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 306 307 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 308 return -EFAULT; 309 } 310 311 return 0; 312 } 313 314 /** 315 * dev_set_hwtstamp_phylib() - Change hardware timestamping of NIC 316 * or of attached phylib PHY 317 * @dev: Network device 318 * @cfg: Timestamping configuration structure 319 * @extack: Netlink extended ack message structure, for error reporting 320 * 321 * Helper for enforcing a common policy that phylib timestamping, if available, 322 * should take precedence in front of hardware timestamping provided by the 323 * netdev. If the netdev driver needs to perform specific actions even for PHY 324 * timestamping to work properly (a switch port must trap the timestamped 325 * frames and not forward them), it must set dev->see_all_hwtstamp_requests. 326 */ 327 int dev_set_hwtstamp_phylib(struct net_device *dev, 328 struct kernel_hwtstamp_config *cfg, 329 struct netlink_ext_ack *extack) 330 { 331 const struct net_device_ops *ops = dev->netdev_ops; 332 struct kernel_hwtstamp_config old_cfg = {}; 333 struct hwtstamp_provider *hwprov; 334 struct phy_device *phydev; 335 bool changed = false; 336 bool phy_ts; 337 int err; 338 339 hwprov = netdev_ops_lock_dereference(dev->hwprov, dev); 340 if (hwprov) { 341 if (hwprov->source == HWTSTAMP_SOURCE_PHYLIB && 342 hwprov->phydev) { 343 phy_ts = true; 344 phydev = hwprov->phydev; 345 } else if (hwprov->source == HWTSTAMP_SOURCE_NETDEV) { 346 phy_ts = false; 347 } else { 348 return -EOPNOTSUPP; 349 } 350 351 cfg->qualifier = hwprov->desc.qualifier; 352 } else { 353 phy_ts = phy_is_default_hwtstamp(dev->phydev); 354 if (phy_ts) 355 phydev = dev->phydev; 356 } 357 358 cfg->source = phy_ts ? HWTSTAMP_SOURCE_PHYLIB : HWTSTAMP_SOURCE_NETDEV; 359 360 if (phy_ts && dev->see_all_hwtstamp_requests) { 361 if (!ops->ndo_hwtstamp_get) 362 return -EOPNOTSUPP; 363 364 err = ops->ndo_hwtstamp_get(dev, &old_cfg); 365 if (err) 366 return err; 367 } 368 369 if (!phy_ts || dev->see_all_hwtstamp_requests) { 370 if (!ops->ndo_hwtstamp_set) 371 return -EOPNOTSUPP; 372 373 err = ops->ndo_hwtstamp_set(dev, cfg, extack); 374 if (err) { 375 if (extack->_msg) 376 netdev_err(dev, "%s\n", extack->_msg); 377 return err; 378 } 379 } 380 381 if (phy_ts && dev->see_all_hwtstamp_requests) 382 changed = kernel_hwtstamp_config_changed(&old_cfg, cfg); 383 384 if (phy_ts) { 385 err = phy_hwtstamp_set(phydev, cfg, extack); 386 if (err) { 387 if (changed) 388 ops->ndo_hwtstamp_set(dev, &old_cfg, NULL); 389 return err; 390 } 391 } 392 393 return 0; 394 } 395 396 static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr) 397 { 398 struct kernel_hwtstamp_config kernel_cfg = {}; 399 struct netlink_ext_ack extack = {}; 400 struct hwtstamp_config cfg; 401 int err; 402 403 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) 404 return -EFAULT; 405 406 hwtstamp_config_to_kernel(&kernel_cfg, &cfg); 407 kernel_cfg.ifr = ifr; 408 409 err = net_hwtstamp_validate(&kernel_cfg); 410 if (err) 411 return err; 412 413 err = dsa_conduit_hwtstamp_validate(dev, &kernel_cfg, &extack); 414 if (err) { 415 if (extack._msg) 416 netdev_err(dev, "%s\n", extack._msg); 417 return err; 418 } 419 420 if (!netif_device_present(dev)) 421 return -ENODEV; 422 423 netdev_lock_ops(dev); 424 err = dev_set_hwtstamp_phylib(dev, &kernel_cfg, &extack); 425 netdev_unlock_ops(dev); 426 if (err) 427 return err; 428 429 /* The driver may have modified the configuration, so copy the 430 * updated version of it back to user space 431 */ 432 if (!kernel_cfg.copied_to_user) { 433 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 434 435 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 436 return -EFAULT; 437 } 438 439 return 0; 440 } 441 442 int generic_hwtstamp_get_lower(struct net_device *dev, 443 struct kernel_hwtstamp_config *kernel_cfg) 444 { 445 int err; 446 447 if (!netif_device_present(dev)) 448 return -ENODEV; 449 450 netdev_lock_ops(dev); 451 err = dev_get_hwtstamp_phylib(dev, kernel_cfg); 452 netdev_unlock_ops(dev); 453 454 return err; 455 } 456 EXPORT_SYMBOL(generic_hwtstamp_get_lower); 457 458 int generic_hwtstamp_set_lower(struct net_device *dev, 459 struct kernel_hwtstamp_config *kernel_cfg, 460 struct netlink_ext_ack *extack) 461 { 462 int err; 463 464 if (!netif_device_present(dev)) 465 return -ENODEV; 466 467 netdev_lock_ops(dev); 468 err = dev_set_hwtstamp_phylib(dev, kernel_cfg, extack); 469 netdev_unlock_ops(dev); 470 471 return err; 472 } 473 EXPORT_SYMBOL(generic_hwtstamp_set_lower); 474 475 static int dev_siocbond(struct net_device *dev, 476 struct ifreq *ifr, unsigned int cmd) 477 { 478 const struct net_device_ops *ops = dev->netdev_ops; 479 480 if (ops->ndo_siocbond) { 481 int ret = -ENODEV; 482 483 netdev_lock_ops(dev); 484 if (netif_device_present(dev)) 485 ret = ops->ndo_siocbond(dev, ifr, cmd); 486 netdev_unlock_ops(dev); 487 488 return ret; 489 } 490 491 return -EOPNOTSUPP; 492 } 493 494 static int dev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, 495 void __user *data, unsigned int cmd) 496 { 497 const struct net_device_ops *ops = dev->netdev_ops; 498 499 if (ops->ndo_siocdevprivate) { 500 int ret = -ENODEV; 501 502 netdev_lock_ops(dev); 503 if (netif_device_present(dev)) 504 ret = ops->ndo_siocdevprivate(dev, ifr, data, cmd); 505 netdev_unlock_ops(dev); 506 507 return ret; 508 } 509 510 return -EOPNOTSUPP; 511 } 512 513 static int dev_siocwandev(struct net_device *dev, struct if_settings *ifs) 514 { 515 const struct net_device_ops *ops = dev->netdev_ops; 516 517 if (ops->ndo_siocwandev) { 518 int ret = -ENODEV; 519 520 netdev_lock_ops(dev); 521 if (netif_device_present(dev)) 522 ret = ops->ndo_siocwandev(dev, ifs); 523 netdev_unlock_ops(dev); 524 525 return ret; 526 } 527 528 return -EOPNOTSUPP; 529 } 530 531 /* 532 * Perform the SIOCxIFxxx calls, inside rtnl_net_lock() 533 */ 534 static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, 535 unsigned int cmd) 536 { 537 int err; 538 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 539 const struct net_device_ops *ops; 540 541 if (!dev) 542 return -ENODEV; 543 544 ops = dev->netdev_ops; 545 546 switch (cmd) { 547 case SIOCSIFFLAGS: /* Set interface flags */ 548 return dev_change_flags(dev, ifr->ifr_flags, NULL); 549 550 case SIOCSIFMETRIC: /* Set the metric on the interface 551 (currently unused) */ 552 return -EOPNOTSUPP; 553 554 case SIOCSIFMTU: /* Set the MTU of a device */ 555 return dev_set_mtu(dev, ifr->ifr_mtu); 556 557 case SIOCSIFHWADDR: 558 if (dev->addr_len > sizeof(ifr->ifr_hwaddr)) 559 return -EINVAL; 560 return dev_set_mac_address_user(dev, 561 (struct sockaddr_storage *)&ifr->ifr_hwaddr, 562 NULL); 563 564 case SIOCSIFHWBROADCAST: 565 if (ifr->ifr_hwaddr.sa_family != dev->type) 566 return -EINVAL; 567 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, 568 min(sizeof(ifr->ifr_hwaddr.sa_data), 569 (size_t)dev->addr_len)); 570 netdev_lock_ops(dev); 571 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 572 netdev_unlock_ops(dev); 573 return 0; 574 575 case SIOCSIFMAP: 576 netdev_lock_ops(dev); 577 err = netif_setifmap(dev, ifr); 578 netdev_unlock_ops(dev); 579 return err; 580 581 case SIOCADDMULTI: 582 if ((!ops->ndo_set_rx_mode && !ops->ndo_set_rx_mode_async) || 583 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 584 return -EINVAL; 585 if (!netif_device_present(dev)) 586 return -ENODEV; 587 netdev_lock_ops(dev); 588 err = dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); 589 netif_rx_mode_sync(dev); 590 netdev_unlock_ops(dev); 591 return err; 592 593 case SIOCDELMULTI: 594 if ((!ops->ndo_set_rx_mode && !ops->ndo_set_rx_mode_async) || 595 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 596 return -EINVAL; 597 if (!netif_device_present(dev)) 598 return -ENODEV; 599 netdev_lock_ops(dev); 600 err = dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); 601 netif_rx_mode_sync(dev); 602 netdev_unlock_ops(dev); 603 return err; 604 605 case SIOCSIFTXQLEN: 606 if (ifr->ifr_qlen < 0) 607 return -EINVAL; 608 return dev_change_tx_queue_len(dev, ifr->ifr_qlen); 609 610 case SIOCSIFNAME: 611 ifr->ifr_newname[IFNAMSIZ-1] = '\0'; 612 return dev_change_name(dev, ifr->ifr_newname); 613 614 case SIOCWANDEV: 615 return dev_siocwandev(dev, &ifr->ifr_settings); 616 617 case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15: 618 return dev_siocdevprivate(dev, ifr, data, cmd); 619 620 case SIOCSHWTSTAMP: 621 return dev_set_hwtstamp(dev, ifr); 622 623 case SIOCGHWTSTAMP: 624 return dev_get_hwtstamp(dev, ifr); 625 626 case SIOCGMIIPHY: 627 case SIOCGMIIREG: 628 case SIOCSMIIREG: 629 return dev_eth_ioctl(dev, ifr, cmd); 630 631 case SIOCBONDENSLAVE: 632 case SIOCBONDRELEASE: 633 case SIOCBONDSETHWADDR: 634 case SIOCBONDSLAVEINFOQUERY: 635 case SIOCBONDINFOQUERY: 636 case SIOCBONDCHANGEACTIVE: 637 return dev_siocbond(dev, ifr, cmd); 638 639 /* Unknown ioctl */ 640 default: 641 err = -EINVAL; 642 } 643 return err; 644 } 645 646 /** 647 * dev_load - load a network module 648 * @net: the applicable net namespace 649 * @name: name of interface 650 * 651 * If a network interface is not present and the process has suitable 652 * privileges this function loads the module. If module loading is not 653 * available in this kernel then it becomes a nop. 654 */ 655 656 void dev_load(struct net *net, const char *name) 657 { 658 struct net_device *dev; 659 int no_module; 660 661 rcu_read_lock(); 662 dev = dev_get_by_name_rcu(net, name); 663 rcu_read_unlock(); 664 665 no_module = !dev; 666 if (no_module && capable(CAP_NET_ADMIN)) 667 no_module = request_module("netdev-%s", name); 668 if (no_module && capable(CAP_SYS_MODULE)) 669 request_module("%s", name); 670 } 671 EXPORT_SYMBOL(dev_load); 672 673 /* 674 * This function handles all "interface"-type I/O control requests. The actual 675 * 'doing' part of this is dev_ifsioc above. 676 */ 677 678 /** 679 * dev_ioctl - network device ioctl 680 * @net: the applicable net namespace 681 * @cmd: command to issue 682 * @ifr: pointer to a struct ifreq in user space 683 * @data: data exchanged with userspace 684 * @need_copyout: whether or not copy_to_user() should be called 685 * 686 * Issue ioctl functions to devices. This is normally called by the 687 * user space syscall interfaces but can sometimes be useful for 688 * other purposes. The return value is the return from the syscall if 689 * positive or a negative errno code on error. 690 */ 691 692 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, 693 void __user *data, bool *need_copyout) 694 { 695 int ret; 696 char *colon; 697 698 if (need_copyout) 699 *need_copyout = true; 700 if (cmd == SIOCGIFNAME) 701 return dev_ifname(net, ifr); 702 703 ifr->ifr_name[IFNAMSIZ-1] = 0; 704 705 colon = strchr(ifr->ifr_name, ':'); 706 if (colon) 707 *colon = 0; 708 709 /* 710 * See which interface the caller is talking about. 711 */ 712 713 switch (cmd) { 714 case SIOCGIFHWADDR: 715 dev_load(net, ifr->ifr_name); 716 ret = netif_get_mac_address(&ifr->ifr_hwaddr, net, 717 ifr->ifr_name); 718 if (colon) 719 *colon = ':'; 720 return ret; 721 /* 722 * These ioctl calls: 723 * - can be done by all. 724 * - atomic and do not require locking. 725 * - return a value 726 */ 727 case SIOCGIFFLAGS: 728 case SIOCGIFMETRIC: 729 case SIOCGIFMTU: 730 case SIOCGIFSLAVE: 731 case SIOCGIFMAP: 732 case SIOCGIFINDEX: 733 case SIOCGIFTXQLEN: 734 dev_load(net, ifr->ifr_name); 735 rcu_read_lock(); 736 ret = dev_ifsioc_locked(net, ifr, cmd); 737 rcu_read_unlock(); 738 if (colon) 739 *colon = ':'; 740 return ret; 741 742 case SIOCETHTOOL: 743 dev_load(net, ifr->ifr_name); 744 ret = dev_ethtool(net, ifr, data); 745 if (colon) 746 *colon = ':'; 747 return ret; 748 749 /* 750 * These ioctl calls: 751 * - require superuser power. 752 * - require strict serialization. 753 * - return a value 754 */ 755 case SIOCGMIIPHY: 756 case SIOCGMIIREG: 757 case SIOCSIFNAME: 758 dev_load(net, ifr->ifr_name); 759 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 760 return -EPERM; 761 762 rtnl_net_lock(net); 763 ret = dev_ifsioc(net, ifr, data, cmd); 764 rtnl_net_unlock(net); 765 766 if (colon) 767 *colon = ':'; 768 return ret; 769 770 /* 771 * These ioctl calls: 772 * - require superuser power. 773 * - require strict serialization. 774 * - do not return a value 775 */ 776 case SIOCSIFMAP: 777 case SIOCSIFTXQLEN: 778 if (!capable(CAP_NET_ADMIN)) 779 return -EPERM; 780 fallthrough; 781 /* 782 * These ioctl calls: 783 * - require local superuser power. 784 * - require strict serialization. 785 * - do not return a value 786 */ 787 case SIOCSIFFLAGS: 788 case SIOCSIFMETRIC: 789 case SIOCSIFMTU: 790 case SIOCSIFHWADDR: 791 case SIOCSIFSLAVE: 792 case SIOCADDMULTI: 793 case SIOCDELMULTI: 794 case SIOCSIFHWBROADCAST: 795 case SIOCSMIIREG: 796 case SIOCBONDENSLAVE: 797 case SIOCBONDRELEASE: 798 case SIOCBONDSETHWADDR: 799 case SIOCBONDCHANGEACTIVE: 800 case SIOCSHWTSTAMP: 801 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 802 return -EPERM; 803 fallthrough; 804 case SIOCBONDSLAVEINFOQUERY: 805 case SIOCBONDINFOQUERY: 806 dev_load(net, ifr->ifr_name); 807 808 rtnl_net_lock(net); 809 ret = dev_ifsioc(net, ifr, data, cmd); 810 rtnl_net_unlock(net); 811 812 if (need_copyout) 813 *need_copyout = false; 814 return ret; 815 816 case SIOCGIFMEM: 817 /* Get the per device memory space. We can add this but 818 * currently do not support it */ 819 case SIOCSIFMEM: 820 /* Set the per device memory buffer space. 821 * Not applicable in our case */ 822 case SIOCSIFLINK: 823 return -ENOTTY; 824 825 /* 826 * Unknown or private ioctl. 827 */ 828 default: 829 if (cmd == SIOCWANDEV || 830 cmd == SIOCGHWTSTAMP || 831 (cmd >= SIOCDEVPRIVATE && 832 cmd <= SIOCDEVPRIVATE + 15)) { 833 dev_load(net, ifr->ifr_name); 834 835 rtnl_net_lock(net); 836 ret = dev_ifsioc(net, ifr, data, cmd); 837 rtnl_net_unlock(net); 838 return ret; 839 } 840 return -ENOTTY; 841 } 842 } 843