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_net_lock(net); 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_net_unlock(net); 76 return -EFAULT; 77 } 78 total += done; 79 } 80 rtnl_net_unlock(net); 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 dev->see_all_hwtstamp_requests. 321 */ 322 int dev_set_hwtstamp_phylib(struct net_device *dev, 323 struct kernel_hwtstamp_config *cfg, 324 struct netlink_ext_ack *extack) 325 { 326 const struct net_device_ops *ops = dev->netdev_ops; 327 bool phy_ts = phy_is_default_hwtstamp(dev->phydev); 328 struct kernel_hwtstamp_config old_cfg = {}; 329 bool changed = false; 330 int err; 331 332 cfg->source = phy_ts ? HWTSTAMP_SOURCE_PHYLIB : HWTSTAMP_SOURCE_NETDEV; 333 334 if (phy_ts && dev->see_all_hwtstamp_requests) { 335 err = ops->ndo_hwtstamp_get(dev, &old_cfg); 336 if (err) 337 return err; 338 } 339 340 if (!phy_ts || dev->see_all_hwtstamp_requests) { 341 err = ops->ndo_hwtstamp_set(dev, cfg, extack); 342 if (err) { 343 if (extack->_msg) 344 netdev_err(dev, "%s\n", extack->_msg); 345 return err; 346 } 347 } 348 349 if (phy_ts && dev->see_all_hwtstamp_requests) 350 changed = kernel_hwtstamp_config_changed(&old_cfg, cfg); 351 352 if (phy_ts) { 353 err = phy_hwtstamp_set(dev->phydev, cfg, extack); 354 if (err) { 355 if (changed) 356 ops->ndo_hwtstamp_set(dev, &old_cfg, NULL); 357 return err; 358 } 359 } 360 361 return 0; 362 } 363 364 static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr) 365 { 366 const struct net_device_ops *ops = dev->netdev_ops; 367 struct kernel_hwtstamp_config kernel_cfg = {}; 368 struct netlink_ext_ack extack = {}; 369 struct hwtstamp_config cfg; 370 int err; 371 372 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) 373 return -EFAULT; 374 375 hwtstamp_config_to_kernel(&kernel_cfg, &cfg); 376 kernel_cfg.ifr = ifr; 377 378 err = net_hwtstamp_validate(&kernel_cfg); 379 if (err) 380 return err; 381 382 err = dsa_conduit_hwtstamp_validate(dev, &kernel_cfg, &extack); 383 if (err) { 384 if (extack._msg) 385 netdev_err(dev, "%s\n", extack._msg); 386 return err; 387 } 388 389 if (!ops->ndo_hwtstamp_set) 390 return dev_eth_ioctl(dev, ifr, SIOCSHWTSTAMP); /* legacy */ 391 392 if (!netif_device_present(dev)) 393 return -ENODEV; 394 395 err = dev_set_hwtstamp_phylib(dev, &kernel_cfg, &extack); 396 if (err) 397 return err; 398 399 /* The driver may have modified the configuration, so copy the 400 * updated version of it back to user space 401 */ 402 if (!kernel_cfg.copied_to_user) { 403 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 404 405 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 406 return -EFAULT; 407 } 408 409 return 0; 410 } 411 412 static int generic_hwtstamp_ioctl_lower(struct net_device *dev, int cmd, 413 struct kernel_hwtstamp_config *kernel_cfg) 414 { 415 struct ifreq ifrr; 416 int err; 417 418 strscpy_pad(ifrr.ifr_name, dev->name, IFNAMSIZ); 419 ifrr.ifr_ifru = kernel_cfg->ifr->ifr_ifru; 420 421 err = dev_eth_ioctl(dev, &ifrr, cmd); 422 if (err) 423 return err; 424 425 kernel_cfg->ifr->ifr_ifru = ifrr.ifr_ifru; 426 kernel_cfg->copied_to_user = true; 427 428 return 0; 429 } 430 431 int generic_hwtstamp_get_lower(struct net_device *dev, 432 struct kernel_hwtstamp_config *kernel_cfg) 433 { 434 const struct net_device_ops *ops = dev->netdev_ops; 435 436 if (!netif_device_present(dev)) 437 return -ENODEV; 438 439 if (ops->ndo_hwtstamp_get) 440 return dev_get_hwtstamp_phylib(dev, kernel_cfg); 441 442 /* Legacy path: unconverted lower driver */ 443 return generic_hwtstamp_ioctl_lower(dev, SIOCGHWTSTAMP, kernel_cfg); 444 } 445 EXPORT_SYMBOL(generic_hwtstamp_get_lower); 446 447 int generic_hwtstamp_set_lower(struct net_device *dev, 448 struct kernel_hwtstamp_config *kernel_cfg, 449 struct netlink_ext_ack *extack) 450 { 451 const struct net_device_ops *ops = dev->netdev_ops; 452 453 if (!netif_device_present(dev)) 454 return -ENODEV; 455 456 if (ops->ndo_hwtstamp_set) 457 return dev_set_hwtstamp_phylib(dev, kernel_cfg, extack); 458 459 /* Legacy path: unconverted lower driver */ 460 return generic_hwtstamp_ioctl_lower(dev, SIOCSHWTSTAMP, kernel_cfg); 461 } 462 EXPORT_SYMBOL(generic_hwtstamp_set_lower); 463 464 static int dev_siocbond(struct net_device *dev, 465 struct ifreq *ifr, unsigned int cmd) 466 { 467 const struct net_device_ops *ops = dev->netdev_ops; 468 469 if (ops->ndo_siocbond) { 470 if (netif_device_present(dev)) 471 return ops->ndo_siocbond(dev, ifr, cmd); 472 else 473 return -ENODEV; 474 } 475 476 return -EOPNOTSUPP; 477 } 478 479 static int dev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, 480 void __user *data, unsigned int cmd) 481 { 482 const struct net_device_ops *ops = dev->netdev_ops; 483 484 if (ops->ndo_siocdevprivate) { 485 if (netif_device_present(dev)) 486 return ops->ndo_siocdevprivate(dev, ifr, data, cmd); 487 else 488 return -ENODEV; 489 } 490 491 return -EOPNOTSUPP; 492 } 493 494 static int dev_siocwandev(struct net_device *dev, struct if_settings *ifs) 495 { 496 const struct net_device_ops *ops = dev->netdev_ops; 497 498 if (ops->ndo_siocwandev) { 499 if (netif_device_present(dev)) 500 return ops->ndo_siocwandev(dev, ifs); 501 else 502 return -ENODEV; 503 } 504 505 return -EOPNOTSUPP; 506 } 507 508 /* 509 * Perform the SIOCxIFxxx calls, inside rtnl_lock() 510 */ 511 static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, 512 unsigned int cmd) 513 { 514 int err; 515 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 516 const struct net_device_ops *ops; 517 netdevice_tracker dev_tracker; 518 519 if (!dev) 520 return -ENODEV; 521 522 ops = dev->netdev_ops; 523 524 switch (cmd) { 525 case SIOCSIFFLAGS: /* Set interface flags */ 526 return dev_change_flags(dev, ifr->ifr_flags, NULL); 527 528 case SIOCSIFMETRIC: /* Set the metric on the interface 529 (currently unused) */ 530 return -EOPNOTSUPP; 531 532 case SIOCSIFMTU: /* Set the MTU of a device */ 533 return dev_set_mtu(dev, ifr->ifr_mtu); 534 535 case SIOCSIFHWADDR: 536 if (dev->addr_len > sizeof(struct sockaddr)) 537 return -EINVAL; 538 return dev_set_mac_address_user(dev, &ifr->ifr_hwaddr, NULL); 539 540 case SIOCSIFHWBROADCAST: 541 if (ifr->ifr_hwaddr.sa_family != dev->type) 542 return -EINVAL; 543 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, 544 min(sizeof(ifr->ifr_hwaddr.sa_data_min), 545 (size_t)dev->addr_len)); 546 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 547 return 0; 548 549 case SIOCSIFMAP: 550 return dev_setifmap(dev, ifr); 551 552 case SIOCADDMULTI: 553 if (!ops->ndo_set_rx_mode || 554 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 555 return -EINVAL; 556 if (!netif_device_present(dev)) 557 return -ENODEV; 558 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); 559 560 case SIOCDELMULTI: 561 if (!ops->ndo_set_rx_mode || 562 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 563 return -EINVAL; 564 if (!netif_device_present(dev)) 565 return -ENODEV; 566 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); 567 568 case SIOCSIFTXQLEN: 569 if (ifr->ifr_qlen < 0) 570 return -EINVAL; 571 return dev_change_tx_queue_len(dev, ifr->ifr_qlen); 572 573 case SIOCSIFNAME: 574 ifr->ifr_newname[IFNAMSIZ-1] = '\0'; 575 return dev_change_name(dev, ifr->ifr_newname); 576 577 case SIOCWANDEV: 578 return dev_siocwandev(dev, &ifr->ifr_settings); 579 580 case SIOCBRADDIF: 581 case SIOCBRDELIF: 582 if (!netif_device_present(dev)) 583 return -ENODEV; 584 if (!netif_is_bridge_master(dev)) 585 return -EOPNOTSUPP; 586 netdev_hold(dev, &dev_tracker, GFP_KERNEL); 587 rtnl_unlock(); 588 err = br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL); 589 netdev_put(dev, &dev_tracker); 590 rtnl_lock(); 591 return err; 592 593 case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15: 594 return dev_siocdevprivate(dev, ifr, data, cmd); 595 596 case SIOCSHWTSTAMP: 597 return dev_set_hwtstamp(dev, ifr); 598 599 case SIOCGHWTSTAMP: 600 return dev_get_hwtstamp(dev, ifr); 601 602 case SIOCGMIIPHY: 603 case SIOCGMIIREG: 604 case SIOCSMIIREG: 605 return dev_eth_ioctl(dev, ifr, cmd); 606 607 case SIOCBONDENSLAVE: 608 case SIOCBONDRELEASE: 609 case SIOCBONDSETHWADDR: 610 case SIOCBONDSLAVEINFOQUERY: 611 case SIOCBONDINFOQUERY: 612 case SIOCBONDCHANGEACTIVE: 613 return dev_siocbond(dev, ifr, cmd); 614 615 /* Unknown ioctl */ 616 default: 617 err = -EINVAL; 618 } 619 return err; 620 } 621 622 /** 623 * dev_load - load a network module 624 * @net: the applicable net namespace 625 * @name: name of interface 626 * 627 * If a network interface is not present and the process has suitable 628 * privileges this function loads the module. If module loading is not 629 * available in this kernel then it becomes a nop. 630 */ 631 632 void dev_load(struct net *net, const char *name) 633 { 634 struct net_device *dev; 635 int no_module; 636 637 rcu_read_lock(); 638 dev = dev_get_by_name_rcu(net, name); 639 rcu_read_unlock(); 640 641 no_module = !dev; 642 if (no_module && capable(CAP_NET_ADMIN)) 643 no_module = request_module("netdev-%s", name); 644 if (no_module && capable(CAP_SYS_MODULE)) 645 request_module("%s", name); 646 } 647 EXPORT_SYMBOL(dev_load); 648 649 /* 650 * This function handles all "interface"-type I/O control requests. The actual 651 * 'doing' part of this is dev_ifsioc above. 652 */ 653 654 /** 655 * dev_ioctl - network device ioctl 656 * @net: the applicable net namespace 657 * @cmd: command to issue 658 * @ifr: pointer to a struct ifreq in user space 659 * @data: data exchanged with userspace 660 * @need_copyout: whether or not copy_to_user() should be called 661 * 662 * Issue ioctl functions to devices. This is normally called by the 663 * user space syscall interfaces but can sometimes be useful for 664 * other purposes. The return value is the return from the syscall if 665 * positive or a negative errno code on error. 666 */ 667 668 int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, 669 void __user *data, bool *need_copyout) 670 { 671 int ret; 672 char *colon; 673 674 if (need_copyout) 675 *need_copyout = true; 676 if (cmd == SIOCGIFNAME) 677 return dev_ifname(net, ifr); 678 679 ifr->ifr_name[IFNAMSIZ-1] = 0; 680 681 colon = strchr(ifr->ifr_name, ':'); 682 if (colon) 683 *colon = 0; 684 685 /* 686 * See which interface the caller is talking about. 687 */ 688 689 switch (cmd) { 690 case SIOCGIFHWADDR: 691 dev_load(net, ifr->ifr_name); 692 ret = dev_get_mac_address(&ifr->ifr_hwaddr, net, ifr->ifr_name); 693 if (colon) 694 *colon = ':'; 695 return ret; 696 /* 697 * These ioctl calls: 698 * - can be done by all. 699 * - atomic and do not require locking. 700 * - return a value 701 */ 702 case SIOCGIFFLAGS: 703 case SIOCGIFMETRIC: 704 case SIOCGIFMTU: 705 case SIOCGIFSLAVE: 706 case SIOCGIFMAP: 707 case SIOCGIFINDEX: 708 case SIOCGIFTXQLEN: 709 dev_load(net, ifr->ifr_name); 710 rcu_read_lock(); 711 ret = dev_ifsioc_locked(net, ifr, cmd); 712 rcu_read_unlock(); 713 if (colon) 714 *colon = ':'; 715 return ret; 716 717 case SIOCETHTOOL: 718 dev_load(net, ifr->ifr_name); 719 ret = dev_ethtool(net, ifr, data); 720 if (colon) 721 *colon = ':'; 722 return ret; 723 724 /* 725 * These ioctl calls: 726 * - require superuser power. 727 * - require strict serialization. 728 * - return a value 729 */ 730 case SIOCGMIIPHY: 731 case SIOCGMIIREG: 732 case SIOCSIFNAME: 733 dev_load(net, ifr->ifr_name); 734 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 735 return -EPERM; 736 rtnl_lock(); 737 ret = dev_ifsioc(net, ifr, data, cmd); 738 rtnl_unlock(); 739 if (colon) 740 *colon = ':'; 741 return ret; 742 743 /* 744 * These ioctl calls: 745 * - require superuser power. 746 * - require strict serialization. 747 * - do not return a value 748 */ 749 case SIOCSIFMAP: 750 case SIOCSIFTXQLEN: 751 if (!capable(CAP_NET_ADMIN)) 752 return -EPERM; 753 fallthrough; 754 /* 755 * These ioctl calls: 756 * - require local superuser power. 757 * - require strict serialization. 758 * - do not return a value 759 */ 760 case SIOCSIFFLAGS: 761 case SIOCSIFMETRIC: 762 case SIOCSIFMTU: 763 case SIOCSIFHWADDR: 764 case SIOCSIFSLAVE: 765 case SIOCADDMULTI: 766 case SIOCDELMULTI: 767 case SIOCSIFHWBROADCAST: 768 case SIOCSMIIREG: 769 case SIOCBONDENSLAVE: 770 case SIOCBONDRELEASE: 771 case SIOCBONDSETHWADDR: 772 case SIOCBONDCHANGEACTIVE: 773 case SIOCBRADDIF: 774 case SIOCBRDELIF: 775 case SIOCSHWTSTAMP: 776 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 777 return -EPERM; 778 fallthrough; 779 case SIOCBONDSLAVEINFOQUERY: 780 case SIOCBONDINFOQUERY: 781 dev_load(net, ifr->ifr_name); 782 rtnl_lock(); 783 ret = dev_ifsioc(net, ifr, data, cmd); 784 rtnl_unlock(); 785 if (need_copyout) 786 *need_copyout = false; 787 return ret; 788 789 case SIOCGIFMEM: 790 /* Get the per device memory space. We can add this but 791 * currently do not support it */ 792 case SIOCSIFMEM: 793 /* Set the per device memory buffer space. 794 * Not applicable in our case */ 795 case SIOCSIFLINK: 796 return -ENOTTY; 797 798 /* 799 * Unknown or private ioctl. 800 */ 801 default: 802 if (cmd == SIOCWANDEV || 803 cmd == SIOCGHWTSTAMP || 804 (cmd >= SIOCDEVPRIVATE && 805 cmd <= SIOCDEVPRIVATE + 15)) { 806 dev_load(net, ifr->ifr_name); 807 rtnl_lock(); 808 ret = dev_ifsioc(net, ifr, data, cmd); 809 rtnl_unlock(); 810 return ret; 811 } 812 return -ENOTTY; 813 } 814 } 815