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