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 dev->netdev_ops->ndo_hwtstamp_get) 272 return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg); 273 274 return -EOPNOTSUPP; 275 } 276 277 if (phy_is_default_hwtstamp(dev->phydev)) 278 return phy_hwtstamp_get(dev->phydev, cfg); 279 280 if (!dev->netdev_ops->ndo_hwtstamp_get) 281 return -EOPNOTSUPP; 282 283 return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg); 284 } 285 286 static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr) 287 { 288 struct kernel_hwtstamp_config kernel_cfg = {}; 289 struct hwtstamp_config cfg; 290 int err; 291 292 if (!netif_device_present(dev)) 293 return -ENODEV; 294 295 kernel_cfg.ifr = ifr; 296 netdev_lock_ops(dev); 297 err = dev_get_hwtstamp_phylib(dev, &kernel_cfg); 298 netdev_unlock_ops(dev); 299 if (err) 300 return err; 301 302 /* If the request was resolved through an unconverted driver, omit 303 * the copy_to_user(), since the implementation has already done that 304 */ 305 if (!kernel_cfg.copied_to_user) { 306 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 307 308 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 309 return -EFAULT; 310 } 311 312 return 0; 313 } 314 315 /** 316 * dev_set_hwtstamp_phylib() - Change hardware timestamping of NIC 317 * or of attached phylib PHY 318 * @dev: Network device 319 * @cfg: Timestamping configuration structure 320 * @extack: Netlink extended ack message structure, for error reporting 321 * 322 * Helper for enforcing a common policy that phylib timestamping, if available, 323 * should take precedence in front of hardware timestamping provided by the 324 * netdev. If the netdev driver needs to perform specific actions even for PHY 325 * timestamping to work properly (a switch port must trap the timestamped 326 * frames and not forward them), it must set dev->see_all_hwtstamp_requests. 327 */ 328 int dev_set_hwtstamp_phylib(struct net_device *dev, 329 struct kernel_hwtstamp_config *cfg, 330 struct netlink_ext_ack *extack) 331 { 332 const struct net_device_ops *ops = dev->netdev_ops; 333 struct kernel_hwtstamp_config old_cfg = {}; 334 struct hwtstamp_provider *hwprov; 335 struct phy_device *phydev; 336 bool changed = false; 337 bool phy_ts; 338 int err; 339 340 hwprov = netdev_ops_lock_dereference(dev->hwprov, dev); 341 if (hwprov) { 342 if (hwprov->source == HWTSTAMP_SOURCE_PHYLIB && 343 hwprov->phydev) { 344 phy_ts = true; 345 phydev = hwprov->phydev; 346 } else if (hwprov->source == HWTSTAMP_SOURCE_NETDEV) { 347 phy_ts = false; 348 } else { 349 return -EOPNOTSUPP; 350 } 351 352 cfg->qualifier = hwprov->desc.qualifier; 353 } else { 354 phy_ts = phy_is_default_hwtstamp(dev->phydev); 355 if (phy_ts) 356 phydev = dev->phydev; 357 } 358 359 cfg->source = phy_ts ? HWTSTAMP_SOURCE_PHYLIB : HWTSTAMP_SOURCE_NETDEV; 360 361 if (phy_ts && dev->see_all_hwtstamp_requests) { 362 if (!ops->ndo_hwtstamp_get) 363 return -EOPNOTSUPP; 364 365 err = ops->ndo_hwtstamp_get(dev, &old_cfg); 366 if (err) 367 return err; 368 } 369 370 if (!phy_ts || dev->see_all_hwtstamp_requests) { 371 if (!ops->ndo_hwtstamp_set) 372 return -EOPNOTSUPP; 373 374 err = ops->ndo_hwtstamp_set(dev, cfg, extack); 375 if (err) { 376 if (extack->_msg) 377 netdev_err(dev, "%s\n", extack->_msg); 378 return err; 379 } 380 } 381 382 if (phy_ts && dev->see_all_hwtstamp_requests) 383 changed = kernel_hwtstamp_config_changed(&old_cfg, cfg); 384 385 if (phy_ts) { 386 err = phy_hwtstamp_set(phydev, cfg, extack); 387 if (err) { 388 if (changed) 389 ops->ndo_hwtstamp_set(dev, &old_cfg, NULL); 390 return err; 391 } 392 } 393 394 return 0; 395 } 396 397 static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr) 398 { 399 struct kernel_hwtstamp_config kernel_cfg = {}; 400 struct netlink_ext_ack extack = {}; 401 struct hwtstamp_config cfg; 402 int err; 403 404 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) 405 return -EFAULT; 406 407 hwtstamp_config_to_kernel(&kernel_cfg, &cfg); 408 kernel_cfg.ifr = ifr; 409 410 err = net_hwtstamp_validate(&kernel_cfg); 411 if (err) 412 return err; 413 414 err = dsa_conduit_hwtstamp_validate(dev, &kernel_cfg, &extack); 415 if (err) { 416 if (extack._msg) 417 netdev_err(dev, "%s\n", extack._msg); 418 return err; 419 } 420 421 if (!netif_device_present(dev)) 422 return -ENODEV; 423 424 netdev_lock_ops(dev); 425 err = dev_set_hwtstamp_phylib(dev, &kernel_cfg, &extack); 426 netdev_unlock_ops(dev); 427 if (err) 428 return err; 429 430 /* The driver may have modified the configuration, so copy the 431 * updated version of it back to user space 432 */ 433 if (!kernel_cfg.copied_to_user) { 434 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 435 436 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 437 return -EFAULT; 438 } 439 440 return 0; 441 } 442 443 int generic_hwtstamp_get_lower(struct net_device *dev, 444 struct kernel_hwtstamp_config *kernel_cfg) 445 { 446 int err; 447 448 if (!netif_device_present(dev)) 449 return -ENODEV; 450 451 netdev_lock_ops(dev); 452 err = dev_get_hwtstamp_phylib(dev, kernel_cfg); 453 netdev_unlock_ops(dev); 454 455 return err; 456 } 457 EXPORT_SYMBOL(generic_hwtstamp_get_lower); 458 459 int generic_hwtstamp_set_lower(struct net_device *dev, 460 struct kernel_hwtstamp_config *kernel_cfg, 461 struct netlink_ext_ack *extack) 462 { 463 int err; 464 465 if (!netif_device_present(dev)) 466 return -ENODEV; 467 468 netdev_lock_ops(dev); 469 err = dev_set_hwtstamp_phylib(dev, kernel_cfg, extack); 470 netdev_unlock_ops(dev); 471 472 return err; 473 } 474 EXPORT_SYMBOL(generic_hwtstamp_set_lower); 475 476 static int dev_siocbond(struct net_device *dev, 477 struct ifreq *ifr, unsigned int cmd) 478 { 479 const struct net_device_ops *ops = dev->netdev_ops; 480 481 if (ops->ndo_siocbond) { 482 int ret = -ENODEV; 483 484 netdev_lock_ops(dev); 485 if (netif_device_present(dev)) 486 ret = ops->ndo_siocbond(dev, ifr, cmd); 487 netdev_unlock_ops(dev); 488 489 return ret; 490 } 491 492 return -EOPNOTSUPP; 493 } 494 495 static int dev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, 496 void __user *data, unsigned int cmd) 497 { 498 const struct net_device_ops *ops = dev->netdev_ops; 499 500 if (ops->ndo_siocdevprivate) { 501 int ret = -ENODEV; 502 503 netdev_lock_ops(dev); 504 if (netif_device_present(dev)) 505 ret = ops->ndo_siocdevprivate(dev, ifr, data, cmd); 506 netdev_unlock_ops(dev); 507 508 return ret; 509 } 510 511 return -EOPNOTSUPP; 512 } 513 514 static int dev_siocwandev(struct net_device *dev, struct if_settings *ifs) 515 { 516 const struct net_device_ops *ops = dev->netdev_ops; 517 518 if (ops->ndo_siocwandev) { 519 int ret = -ENODEV; 520 521 netdev_lock_ops(dev); 522 if (netif_device_present(dev)) 523 ret = ops->ndo_siocwandev(dev, ifs); 524 netdev_unlock_ops(dev); 525 526 return ret; 527 } 528 529 return -EOPNOTSUPP; 530 } 531 532 /* 533 * Perform the SIOCxIFxxx calls, inside rtnl_net_lock() 534 */ 535 static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, 536 unsigned int cmd) 537 { 538 int err; 539 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 540 const struct net_device_ops *ops; 541 542 if (!dev) 543 return -ENODEV; 544 545 ops = dev->netdev_ops; 546 547 switch (cmd) { 548 case SIOCSIFFLAGS: /* Set interface flags */ 549 return dev_change_flags(dev, ifr->ifr_flags, NULL); 550 551 case SIOCSIFMETRIC: /* Set the metric on the interface 552 (currently unused) */ 553 return -EOPNOTSUPP; 554 555 case SIOCSIFMTU: /* Set the MTU of a device */ 556 return dev_set_mtu(dev, ifr->ifr_mtu); 557 558 case SIOCSIFHWADDR: 559 if (dev->addr_len > sizeof(ifr->ifr_hwaddr)) 560 return -EINVAL; 561 return dev_set_mac_address_user(dev, 562 (struct sockaddr_storage *)&ifr->ifr_hwaddr, 563 NULL); 564 565 case SIOCSIFHWBROADCAST: 566 if (ifr->ifr_hwaddr.sa_family != dev->type) 567 return -EINVAL; 568 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, 569 min(sizeof(ifr->ifr_hwaddr.sa_data), 570 (size_t)dev->addr_len)); 571 netdev_lock_ops(dev); 572 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 573 netdev_unlock_ops(dev); 574 return 0; 575 576 case SIOCSIFMAP: 577 netdev_lock_ops(dev); 578 err = netif_setifmap(dev, ifr); 579 netdev_unlock_ops(dev); 580 return err; 581 582 case SIOCADDMULTI: 583 if ((!ops->ndo_set_rx_mode && !ops->ndo_set_rx_mode_async) || 584 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 585 return -EINVAL; 586 if (!netif_device_present(dev)) 587 return -ENODEV; 588 netdev_lock_ops(dev); 589 err = dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); 590 netif_rx_mode_sync(dev); 591 netdev_unlock_ops(dev); 592 return err; 593 594 case SIOCDELMULTI: 595 if ((!ops->ndo_set_rx_mode && !ops->ndo_set_rx_mode_async) || 596 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 597 return -EINVAL; 598 if (!netif_device_present(dev)) 599 return -ENODEV; 600 netdev_lock_ops(dev); 601 err = dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); 602 netif_rx_mode_sync(dev); 603 netdev_unlock_ops(dev); 604 return err; 605 606 case SIOCSIFTXQLEN: 607 if (ifr->ifr_qlen < 0) 608 return -EINVAL; 609 return dev_change_tx_queue_len(dev, ifr->ifr_qlen); 610 611 case SIOCSIFNAME: 612 ifr->ifr_newname[IFNAMSIZ-1] = '\0'; 613 return dev_change_name(dev, ifr->ifr_newname); 614 615 case SIOCWANDEV: 616 return dev_siocwandev(dev, &ifr->ifr_settings); 617 618 case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15: 619 return dev_siocdevprivate(dev, ifr, data, cmd); 620 621 case SIOCSHWTSTAMP: 622 return dev_set_hwtstamp(dev, ifr); 623 624 case SIOCGHWTSTAMP: 625 return dev_get_hwtstamp(dev, ifr); 626 627 case SIOCGMIIPHY: 628 case SIOCGMIIREG: 629 case SIOCSMIIREG: 630 return dev_eth_ioctl(dev, ifr, cmd); 631 632 case SIOCBONDENSLAVE: 633 case SIOCBONDRELEASE: 634 case SIOCBONDSETHWADDR: 635 case SIOCBONDSLAVEINFOQUERY: 636 case SIOCBONDINFOQUERY: 637 case SIOCBONDCHANGEACTIVE: 638 return dev_siocbond(dev, ifr, cmd); 639 640 /* Unknown ioctl */ 641 default: 642 err = -EINVAL; 643 } 644 return err; 645 } 646 647 /** 648 * dev_load - load a network module 649 * @net: the applicable net namespace 650 * @name: name of interface 651 * 652 * If a network interface is not present and the process has suitable 653 * privileges this function loads the module. If module loading is not 654 * available in this kernel then it becomes a nop. 655 */ 656 657 void dev_load(struct net *net, const char *name) 658 { 659 struct net_device *dev; 660 int no_module; 661 662 rcu_read_lock(); 663 dev = dev_get_by_name_rcu(net, name); 664 rcu_read_unlock(); 665 666 no_module = !dev; 667 if (no_module && capable(CAP_NET_ADMIN)) 668 no_module = request_module("netdev-%s", name); 669 if (no_module && capable(CAP_SYS_MODULE)) 670 request_module("%s", name); 671 } 672 EXPORT_SYMBOL(dev_load); 673 674 /* 675 * This function handles all "interface"-type I/O control requests. The actual 676 * 'doing' part of this is dev_ifsioc above. 677 */ 678 679 /** 680 * dev_ioctl - network device ioctl 681 * @net: the applicable net namespace 682 * @cmd: command to issue 683 * @ifr: pointer to a struct ifreq in user space 684 * @data: data exchanged with userspace 685 * @need_copyout: whether or not copy_to_user() should be called 686 * 687 * Issue ioctl functions to devices. This is normally called by the 688 * user space syscall interfaces but can sometimes be useful for 689 * other purposes. The return value is the return from the syscall if 690 * positive or a negative errno code on error. 691 */ 692 693 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, 694 void __user *data, bool *need_copyout) 695 { 696 int ret; 697 char *colon; 698 699 if (need_copyout) 700 *need_copyout = true; 701 if (cmd == SIOCGIFNAME) 702 return dev_ifname(net, ifr); 703 704 ifr->ifr_name[IFNAMSIZ-1] = 0; 705 706 colon = strchr(ifr->ifr_name, ':'); 707 if (colon) 708 *colon = 0; 709 710 /* 711 * See which interface the caller is talking about. 712 */ 713 714 switch (cmd) { 715 case SIOCGIFHWADDR: 716 dev_load(net, ifr->ifr_name); 717 ret = netif_get_mac_address(&ifr->ifr_hwaddr, net, 718 ifr->ifr_name); 719 if (colon) 720 *colon = ':'; 721 return ret; 722 /* 723 * These ioctl calls: 724 * - can be done by all. 725 * - atomic and do not require locking. 726 * - return a value 727 */ 728 case SIOCGIFFLAGS: 729 case SIOCGIFMETRIC: 730 case SIOCGIFMTU: 731 case SIOCGIFSLAVE: 732 case SIOCGIFMAP: 733 case SIOCGIFINDEX: 734 case SIOCGIFTXQLEN: 735 dev_load(net, ifr->ifr_name); 736 rcu_read_lock(); 737 ret = dev_ifsioc_locked(net, ifr, cmd); 738 rcu_read_unlock(); 739 if (colon) 740 *colon = ':'; 741 return ret; 742 743 case SIOCETHTOOL: 744 dev_load(net, ifr->ifr_name); 745 ret = dev_ethtool(net, ifr, data); 746 if (colon) 747 *colon = ':'; 748 return ret; 749 750 /* 751 * These ioctl calls: 752 * - require superuser power. 753 * - require strict serialization. 754 * - return a value 755 */ 756 case SIOCGMIIPHY: 757 case SIOCGMIIREG: 758 case SIOCSIFNAME: 759 dev_load(net, ifr->ifr_name); 760 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 761 return -EPERM; 762 763 rtnl_net_lock(net); 764 ret = dev_ifsioc(net, ifr, data, cmd); 765 rtnl_net_unlock(net); 766 767 if (colon) 768 *colon = ':'; 769 return ret; 770 771 /* 772 * These ioctl calls: 773 * - require superuser power. 774 * - require strict serialization. 775 * - do not return a value 776 */ 777 case SIOCSIFMAP: 778 case SIOCSIFTXQLEN: 779 if (!capable(CAP_NET_ADMIN)) 780 return -EPERM; 781 fallthrough; 782 /* 783 * These ioctl calls: 784 * - require local superuser power. 785 * - require strict serialization. 786 * - do not return a value 787 */ 788 case SIOCSIFFLAGS: 789 case SIOCSIFMETRIC: 790 case SIOCSIFMTU: 791 case SIOCSIFHWADDR: 792 case SIOCSIFSLAVE: 793 case SIOCADDMULTI: 794 case SIOCDELMULTI: 795 case SIOCSIFHWBROADCAST: 796 case SIOCSMIIREG: 797 case SIOCBONDENSLAVE: 798 case SIOCBONDRELEASE: 799 case SIOCBONDSETHWADDR: 800 case SIOCBONDCHANGEACTIVE: 801 case SIOCSHWTSTAMP: 802 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 803 return -EPERM; 804 fallthrough; 805 case SIOCBONDSLAVEINFOQUERY: 806 case SIOCBONDINFOQUERY: 807 dev_load(net, ifr->ifr_name); 808 809 rtnl_net_lock(net); 810 ret = dev_ifsioc(net, ifr, data, cmd); 811 rtnl_net_unlock(net); 812 813 if (need_copyout) 814 *need_copyout = false; 815 return ret; 816 817 case SIOCGIFMEM: 818 /* Get the per device memory space. We can add this but 819 * currently do not support it */ 820 case SIOCSIFMEM: 821 /* Set the per device memory buffer space. 822 * Not applicable in our case */ 823 case SIOCSIFLINK: 824 return -ENOTTY; 825 826 /* 827 * Unknown or private ioctl. 828 */ 829 default: 830 if (cmd == SIOCWANDEV || 831 cmd == SIOCGHWTSTAMP || 832 (cmd >= SIOCDEVPRIVATE && 833 cmd <= SIOCDEVPRIVATE + 15)) { 834 dev_load(net, ifr->ifr_name); 835 836 rtnl_net_lock(net); 837 ret = dev_ifsioc(net, ifr, data, cmd); 838 rtnl_net_unlock(net); 839 return ret; 840 } 841 return -ENOTTY; 842 } 843 } 844