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 27static 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 */ 38int 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 85static 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 112static 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 */ 138static 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 187static 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 242static 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 enforcing a common policy that phylib timestamping, if available, 263 * should take precedence in front of hardware timestamping provided by the 264 * netdev. 265 * 266 * Note: phy_mii_ioctl() only handles SIOCSHWTSTAMP (not SIOCGHWTSTAMP), and 267 * there only exists a phydev->mii_ts->hwtstamp() method. So this will return 268 * -EOPNOTSUPP for phylib for now, which is still more accurate than letting 269 * the netdev handle the GET request. 270 */ 271static int dev_get_hwtstamp_phylib(struct net_device *dev, 272 struct kernel_hwtstamp_config *cfg) 273{ 274 if (phy_has_hwtstamp(dev->phydev)) 275 return phy_hwtstamp_get(dev->phydev, cfg); 276 277 return dev->netdev_ops->ndo_hwtstamp_get(dev, cfg); 278} 279 280static int dev_get_hwtstamp(struct net_device *dev, struct ifreq *ifr) 281{ 282 const struct net_device_ops *ops = dev->netdev_ops; 283 struct kernel_hwtstamp_config kernel_cfg = {}; 284 struct hwtstamp_config cfg; 285 int err; 286 287 if (!ops->ndo_hwtstamp_get) 288 return dev_eth_ioctl(dev, ifr, SIOCGHWTSTAMP); /* legacy */ 289 290 if (!netif_device_present(dev)) 291 return -ENODEV; 292 293 kernel_cfg.ifr = ifr; 294 err = dev_get_hwtstamp_phylib(dev, &kernel_cfg); 295 if (err) 296 return err; 297 298 /* If the request was resolved through an unconverted driver, omit 299 * the copy_to_user(), since the implementation has already done that 300 */ 301 if (!kernel_cfg.copied_to_user) { 302 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 303 304 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 305 return -EFAULT; 306 } 307 308 return 0; 309} 310 311/** 312 * dev_set_hwtstamp_phylib() - Change hardware timestamping of NIC 313 * or of attached phylib PHY 314 * @dev: Network device 315 * @cfg: Timestamping configuration structure 316 * @extack: Netlink extended ack message structure, for error reporting 317 * 318 * Helper for enforcing a common policy that phylib timestamping, if available, 319 * should take precedence in front of hardware timestamping provided by the 320 * netdev. If the netdev driver needs to perform specific actions even for PHY 321 * timestamping to work properly (a switch port must trap the timestamped 322 * frames and not forward them), it must set IFF_SEE_ALL_HWTSTAMP_REQUESTS in 323 * dev->priv_flags. 324 */ 325static int dev_set_hwtstamp_phylib(struct net_device *dev, 326 struct kernel_hwtstamp_config *cfg, 327 struct netlink_ext_ack *extack) 328{ 329 const struct net_device_ops *ops = dev->netdev_ops; 330 bool phy_ts = phy_has_hwtstamp(dev->phydev); 331 struct kernel_hwtstamp_config old_cfg = {}; 332 bool changed = false; 333 int err; 334 335 cfg->source = phy_ts ? HWTSTAMP_SOURCE_PHYLIB : HWTSTAMP_SOURCE_NETDEV; 336 337 if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) { 338 err = ops->ndo_hwtstamp_get(dev, &old_cfg); 339 if (err) 340 return err; 341 } 342 343 if (!phy_ts || (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) { 344 err = ops->ndo_hwtstamp_set(dev, cfg, extack); 345 if (err) { 346 if (extack->_msg) 347 netdev_err(dev, "%s\n", extack->_msg); 348 return err; 349 } 350 } 351 352 if (phy_ts && (dev->priv_flags & IFF_SEE_ALL_HWTSTAMP_REQUESTS)) 353 changed = kernel_hwtstamp_config_changed(&old_cfg, cfg); 354 355 if (phy_ts) { 356 err = phy_hwtstamp_set(dev->phydev, cfg, extack); 357 if (err) { 358 if (changed) 359 ops->ndo_hwtstamp_set(dev, &old_cfg, NULL); 360 return err; 361 } 362 } 363 364 return 0; 365} 366 367static int dev_set_hwtstamp(struct net_device *dev, struct ifreq *ifr) 368{ 369 const struct net_device_ops *ops = dev->netdev_ops; 370 struct kernel_hwtstamp_config kernel_cfg = {}; 371 struct netlink_ext_ack extack = {}; 372 struct hwtstamp_config cfg; 373 int err; 374 375 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg))) 376 return -EFAULT; 377 378 hwtstamp_config_to_kernel(&kernel_cfg, &cfg); 379 kernel_cfg.ifr = ifr; 380 381 err = net_hwtstamp_validate(&kernel_cfg); 382 if (err) 383 return err; 384 385 err = dsa_master_hwtstamp_validate(dev, &kernel_cfg, &extack); 386 if (err) { 387 if (extack._msg) 388 netdev_err(dev, "%s\n", extack._msg); 389 return err; 390 } 391 392 if (!ops->ndo_hwtstamp_set) 393 return dev_eth_ioctl(dev, ifr, SIOCSHWTSTAMP); /* legacy */ 394 395 if (!netif_device_present(dev)) 396 return -ENODEV; 397 398 err = dev_set_hwtstamp_phylib(dev, &kernel_cfg, &extack); 399 if (err) 400 return err; 401 402 /* The driver may have modified the configuration, so copy the 403 * updated version of it back to user space 404 */ 405 if (!kernel_cfg.copied_to_user) { 406 hwtstamp_config_from_kernel(&cfg, &kernel_cfg); 407 408 if (copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg))) 409 return -EFAULT; 410 } 411 412 return 0; 413} 414 415static int generic_hwtstamp_ioctl_lower(struct net_device *dev, int cmd, 416 struct kernel_hwtstamp_config *kernel_cfg) 417{ 418 struct ifreq ifrr; 419 int err; 420 421 strscpy_pad(ifrr.ifr_name, dev->name, IFNAMSIZ); 422 ifrr.ifr_ifru = kernel_cfg->ifr->ifr_ifru; 423 424 err = dev_eth_ioctl(dev, &ifrr, cmd); 425 if (err) 426 return err; 427 428 kernel_cfg->ifr->ifr_ifru = ifrr.ifr_ifru; 429 kernel_cfg->copied_to_user = true; 430 431 return 0; 432} 433 434int generic_hwtstamp_get_lower(struct net_device *dev, 435 struct kernel_hwtstamp_config *kernel_cfg) 436{ 437 const struct net_device_ops *ops = dev->netdev_ops; 438 439 if (!netif_device_present(dev)) 440 return -ENODEV; 441 442 if (ops->ndo_hwtstamp_get) 443 return dev_get_hwtstamp_phylib(dev, kernel_cfg); 444 445 /* Legacy path: unconverted lower driver */ 446 return generic_hwtstamp_ioctl_lower(dev, SIOCGHWTSTAMP, kernel_cfg); 447} 448EXPORT_SYMBOL(generic_hwtstamp_get_lower); 449 450int generic_hwtstamp_set_lower(struct net_device *dev, 451 struct kernel_hwtstamp_config *kernel_cfg, 452 struct netlink_ext_ack *extack) 453{ 454 const struct net_device_ops *ops = dev->netdev_ops; 455 456 if (!netif_device_present(dev)) 457 return -ENODEV; 458 459 if (ops->ndo_hwtstamp_set) 460 return dev_set_hwtstamp_phylib(dev, kernel_cfg, extack); 461 462 /* Legacy path: unconverted lower driver */ 463 return generic_hwtstamp_ioctl_lower(dev, SIOCSHWTSTAMP, kernel_cfg); 464} 465EXPORT_SYMBOL(generic_hwtstamp_set_lower); 466 467static int dev_siocbond(struct net_device *dev, 468 struct ifreq *ifr, unsigned int cmd) 469{ 470 const struct net_device_ops *ops = dev->netdev_ops; 471 472 if (ops->ndo_siocbond) { 473 if (netif_device_present(dev)) 474 return ops->ndo_siocbond(dev, ifr, cmd); 475 else 476 return -ENODEV; 477 } 478 479 return -EOPNOTSUPP; 480} 481 482static int dev_siocdevprivate(struct net_device *dev, struct ifreq *ifr, 483 void __user *data, unsigned int cmd) 484{ 485 const struct net_device_ops *ops = dev->netdev_ops; 486 487 if (ops->ndo_siocdevprivate) { 488 if (netif_device_present(dev)) 489 return ops->ndo_siocdevprivate(dev, ifr, data, cmd); 490 else 491 return -ENODEV; 492 } 493 494 return -EOPNOTSUPP; 495} 496 497static int dev_siocwandev(struct net_device *dev, struct if_settings *ifs) 498{ 499 const struct net_device_ops *ops = dev->netdev_ops; 500 501 if (ops->ndo_siocwandev) { 502 if (netif_device_present(dev)) 503 return ops->ndo_siocwandev(dev, ifs); 504 else 505 return -ENODEV; 506 } 507 508 return -EOPNOTSUPP; 509} 510 511/* 512 * Perform the SIOCxIFxxx calls, inside rtnl_lock() 513 */ 514static int dev_ifsioc(struct net *net, struct ifreq *ifr, void __user *data, 515 unsigned int cmd) 516{ 517 int err; 518 struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name); 519 const struct net_device_ops *ops; 520 netdevice_tracker dev_tracker; 521 522 if (!dev) 523 return -ENODEV; 524 525 ops = dev->netdev_ops; 526 527 switch (cmd) { 528 case SIOCSIFFLAGS: /* Set interface flags */ 529 return dev_change_flags(dev, ifr->ifr_flags, NULL); 530 531 case SIOCSIFMETRIC: /* Set the metric on the interface 532 (currently unused) */ 533 return -EOPNOTSUPP; 534 535 case SIOCSIFMTU: /* Set the MTU of a device */ 536 return dev_set_mtu(dev, ifr->ifr_mtu); 537 538 case SIOCSIFHWADDR: 539 if (dev->addr_len > sizeof(struct sockaddr)) 540 return -EINVAL; 541 return dev_set_mac_address_user(dev, &ifr->ifr_hwaddr, NULL); 542 543 case SIOCSIFHWBROADCAST: 544 if (ifr->ifr_hwaddr.sa_family != dev->type) 545 return -EINVAL; 546 memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, 547 min(sizeof(ifr->ifr_hwaddr.sa_data_min), 548 (size_t)dev->addr_len)); 549 call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); 550 return 0; 551 552 case SIOCSIFMAP: 553 return dev_setifmap(dev, ifr); 554 555 case SIOCADDMULTI: 556 if (!ops->ndo_set_rx_mode || 557 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 558 return -EINVAL; 559 if (!netif_device_present(dev)) 560 return -ENODEV; 561 return dev_mc_add_global(dev, ifr->ifr_hwaddr.sa_data); 562 563 case SIOCDELMULTI: 564 if (!ops->ndo_set_rx_mode || 565 ifr->ifr_hwaddr.sa_family != AF_UNSPEC) 566 return -EINVAL; 567 if (!netif_device_present(dev)) 568 return -ENODEV; 569 return dev_mc_del_global(dev, ifr->ifr_hwaddr.sa_data); 570 571 case SIOCSIFTXQLEN: 572 if (ifr->ifr_qlen < 0) 573 return -EINVAL; 574 return dev_change_tx_queue_len(dev, ifr->ifr_qlen); 575 576 case SIOCSIFNAME: 577 ifr->ifr_newname[IFNAMSIZ-1] = '\0'; 578 return dev_change_name(dev, ifr->ifr_newname); 579 580 case SIOCWANDEV: 581 return dev_siocwandev(dev, &ifr->ifr_settings); 582 583 case SIOCBRADDIF: 584 case SIOCBRDELIF: 585 if (!netif_device_present(dev)) 586 return -ENODEV; 587 if (!netif_is_bridge_master(dev)) 588 return -EOPNOTSUPP; 589 netdev_hold(dev, &dev_tracker, GFP_KERNEL); 590 rtnl_unlock(); 591 err = br_ioctl_call(net, netdev_priv(dev), cmd, ifr, NULL); 592 netdev_put(dev, &dev_tracker); 593 rtnl_lock(); 594 return err; 595 596 case SIOCDEVPRIVATE ... SIOCDEVPRIVATE + 15: 597 return dev_siocdevprivate(dev, ifr, data, cmd); 598 599 case SIOCSHWTSTAMP: 600 return dev_set_hwtstamp(dev, ifr); 601 602 case SIOCGHWTSTAMP: 603 return dev_get_hwtstamp(dev, ifr); 604 605 case SIOCGMIIPHY: 606 case SIOCGMIIREG: 607 case SIOCSMIIREG: 608 return dev_eth_ioctl(dev, ifr, cmd); 609 610 case SIOCBONDENSLAVE: 611 case SIOCBONDRELEASE: 612 case SIOCBONDSETHWADDR: 613 case SIOCBONDSLAVEINFOQUERY: 614 case SIOCBONDINFOQUERY: 615 case SIOCBONDCHANGEACTIVE: 616 return dev_siocbond(dev, ifr, cmd); 617 618 /* Unknown ioctl */ 619 default: 620 err = -EINVAL; 621 } 622 return err; 623} 624 625/** 626 * dev_load - load a network module 627 * @net: the applicable net namespace 628 * @name: name of interface 629 * 630 * If a network interface is not present and the process has suitable 631 * privileges this function loads the module. If module loading is not 632 * available in this kernel then it becomes a nop. 633 */ 634 635void dev_load(struct net *net, const char *name) 636{ 637 struct net_device *dev; 638 int no_module; 639 640 rcu_read_lock(); 641 dev = dev_get_by_name_rcu(net, name); 642 rcu_read_unlock(); 643 644 no_module = !dev; 645 if (no_module && capable(CAP_NET_ADMIN)) 646 no_module = request_module("netdev-%s", name); 647 if (no_module && capable(CAP_SYS_MODULE)) 648 request_module("%s", name); 649} 650EXPORT_SYMBOL(dev_load); 651 652/* 653 * This function handles all "interface"-type I/O control requests. The actual 654 * 'doing' part of this is dev_ifsioc above. 655 */ 656 657/** 658 * dev_ioctl - network device ioctl 659 * @net: the applicable net namespace 660 * @cmd: command to issue 661 * @ifr: pointer to a struct ifreq in user space 662 * @data: data exchanged with userspace 663 * @need_copyout: whether or not copy_to_user() should be called 664 * 665 * Issue ioctl functions to devices. This is normally called by the 666 * user space syscall interfaces but can sometimes be useful for 667 * other purposes. The return value is the return from the syscall if 668 * positive or a negative errno code on error. 669 */ 670 671int dev_ioctl(struct net *net, unsigned int cmd, struct ifreq *ifr, 672 void __user *data, bool *need_copyout) 673{ 674 int ret; 675 char *colon; 676 677 if (need_copyout) 678 *need_copyout = true; 679 if (cmd == SIOCGIFNAME) 680 return dev_ifname(net, ifr); 681 682 ifr->ifr_name[IFNAMSIZ-1] = 0; 683 684 colon = strchr(ifr->ifr_name, ':'); 685 if (colon) 686 *colon = 0; 687 688 /* 689 * See which interface the caller is talking about. 690 */ 691 692 switch (cmd) { 693 case SIOCGIFHWADDR: 694 dev_load(net, ifr->ifr_name); 695 ret = dev_get_mac_address(&ifr->ifr_hwaddr, net, ifr->ifr_name); 696 if (colon) 697 *colon = ':'; 698 return ret; 699 /* 700 * These ioctl calls: 701 * - can be done by all. 702 * - atomic and do not require locking. 703 * - return a value 704 */ 705 case SIOCGIFFLAGS: 706 case SIOCGIFMETRIC: 707 case SIOCGIFMTU: 708 case SIOCGIFSLAVE: 709 case SIOCGIFMAP: 710 case SIOCGIFINDEX: 711 case SIOCGIFTXQLEN: 712 dev_load(net, ifr->ifr_name); 713 rcu_read_lock(); 714 ret = dev_ifsioc_locked(net, ifr, cmd); 715 rcu_read_unlock(); 716 if (colon) 717 *colon = ':'; 718 return ret; 719 720 case SIOCETHTOOL: 721 dev_load(net, ifr->ifr_name); 722 ret = dev_ethtool(net, ifr, data); 723 if (colon) 724 *colon = ':'; 725 return ret; 726 727 /* 728 * These ioctl calls: 729 * - require superuser power. 730 * - require strict serialization. 731 * - return a value 732 */ 733 case SIOCGMIIPHY: 734 case SIOCGMIIREG: 735 case SIOCSIFNAME: 736 dev_load(net, ifr->ifr_name); 737 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 738 return -EPERM; 739 rtnl_lock(); 740 ret = dev_ifsioc(net, ifr, data, cmd); 741 rtnl_unlock(); 742 if (colon) 743 *colon = ':'; 744 return ret; 745 746 /* 747 * These ioctl calls: 748 * - require superuser power. 749 * - require strict serialization. 750 * - do not return a value 751 */ 752 case SIOCSIFMAP: 753 case SIOCSIFTXQLEN: 754 if (!capable(CAP_NET_ADMIN)) 755 return -EPERM; 756 fallthrough; 757 /* 758 * These ioctl calls: 759 * - require local superuser power. 760 * - require strict serialization. 761 * - do not return a value 762 */ 763 case SIOCSIFFLAGS: 764 case SIOCSIFMETRIC: 765 case SIOCSIFMTU: 766 case SIOCSIFHWADDR: 767 case SIOCSIFSLAVE: 768 case SIOCADDMULTI: 769 case SIOCDELMULTI: 770 case SIOCSIFHWBROADCAST: 771 case SIOCSMIIREG: 772 case SIOCBONDENSLAVE: 773 case SIOCBONDRELEASE: 774 case SIOCBONDSETHWADDR: 775 case SIOCBONDCHANGEACTIVE: 776 case SIOCBRADDIF: 777 case SIOCBRDELIF: 778 case SIOCSHWTSTAMP: 779 if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) 780 return -EPERM; 781 fallthrough; 782 case SIOCBONDSLAVEINFOQUERY: 783 case SIOCBONDINFOQUERY: 784 dev_load(net, ifr->ifr_name); 785 rtnl_lock(); 786 ret = dev_ifsioc(net, ifr, data, cmd); 787 rtnl_unlock(); 788 if (need_copyout) 789 *need_copyout = false; 790 return ret; 791 792 case SIOCGIFMEM: 793 /* Get the per device memory space. We can add this but 794 * currently do not support it */ 795 case SIOCSIFMEM: 796 /* Set the per device memory buffer space. 797 * Not applicable in our case */ 798 case SIOCSIFLINK: 799 return -ENOTTY; 800 801 /* 802 * Unknown or private ioctl. 803 */ 804 default: 805 if (cmd == SIOCWANDEV || 806 cmd == SIOCGHWTSTAMP || 807 (cmd >= SIOCDEVPRIVATE && 808 cmd <= SIOCDEVPRIVATE + 15)) { 809 dev_load(net, ifr->ifr_name); 810 rtnl_lock(); 811 ret = dev_ifsioc(net, ifr, data, cmd); 812 rtnl_unlock(); 813 return ret; 814 } 815 return -ENOTTY; 816 } 817} 818