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