net/core/ethtool.c

   1 /*
   2  * net/core/ethtool.c - Ethtool ioctl handler
   3  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   4  *
   5  * This file is where we call all the ethtool_ops commands to get
   6  * the information ethtool needs.  We fall back to calling do_ioctl()
   7  * for drivers which haven't been converted to ethtool_ops yet.
   8  *
   9  * It's GPL, stupid.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/types.h>
  14 #include <linux/errno.h>
  15 #include <linux/ethtool.h>
  16 #include <linux/netdevice.h>
  17 #include <asm/uaccess.h>
  18
  19 /*
  20  * Some useful ethtool_ops methods that're device independent.
  21  * If we find that all drivers want to do the same thing here,
  22  * we can turn these into dev_() function calls.
  23  */
  24
  25 u32 ethtool_op_get_link(struct net_device *dev)
  26 {
  27         return netif_carrier_ok(dev) ? 1 : 0;
  28 }
  29
  30 u32 ethtool_op_get_tx_csum(struct net_device *dev)
  31 {
  32         return (dev->features & (NETIF_F_IP_CSUM | NETIF_F_HW_CSUM)) != 0;
  33 }
  34
  35 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
  36 {
  37         if (data)
  38                 dev->features |= NETIF_F_IP_CSUM;
  39         else
  40                 dev->features &= ~NETIF_F_IP_CSUM;
  41
  42         return 0;
  43 }
  44
  45 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
  46 {
  47         if (data)
  48                 dev->features |= NETIF_F_HW_CSUM;
  49         else
  50                 dev->features &= ~NETIF_F_HW_CSUM;
  51
  52         return 0;
  53 }
  54 u32 ethtool_op_get_sg(struct net_device *dev)
  55 {
  56         return (dev->features & NETIF_F_SG) != 0;
  57 }
  58
  59 int ethtool_op_set_sg(struct net_device *dev, u32 data)
  60 {
  61         if (data)
  62                 dev->features |= NETIF_F_SG;
  63         else
  64                 dev->features &= ~NETIF_F_SG;
  65
  66         return 0;
  67 }
  68
  69 u32 ethtool_op_get_tso(struct net_device *dev)
  70 {
  71         return (dev->features & NETIF_F_TSO) != 0;
  72 }
  73
  74 int ethtool_op_set_tso(struct net_device *dev, u32 data)
  75 {
  76         if (data)
  77                 dev->features |= NETIF_F_TSO;
  78         else
  79                 dev->features &= ~NETIF_F_TSO;
  80
  81         return 0;
  82 }
  83
  84 /* Handlers for each ethtool command */
  85
  86 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
  87 {
  88         struct ethtool_cmd cmd = { ETHTOOL_GSET };
  89         int err;
  90
  91         if (!dev->ethtool_ops->get_settings)
  92                 return -EOPNOTSUPP;
  93
  94         err = dev->ethtool_ops->get_settings(dev, &cmd);
  95         if (err < 0)
  96                 return err;
  97
  98         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
  99                 return -EFAULT;
 100         return 0;
 101 }
 102
 103 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 104 {
 105         struct ethtool_cmd cmd;
 106
 107         if (!dev->ethtool_ops->set_settings)
 108                 return -EOPNOTSUPP;
 109
 110         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 111                 return -EFAULT;
 112
 113         return dev->ethtool_ops->set_settings(dev, &cmd);
 114 }
 115
 116 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
 117 {
 118         struct ethtool_drvinfo info;
 119         struct ethtool_ops *ops = dev->ethtool_ops;
 120
 121         if (!ops->get_drvinfo)
 122                 return -EOPNOTSUPP;
 123
 124         memset(&info, 0, sizeof(info));
 125         info.cmd = ETHTOOL_GDRVINFO;
 126         ops->get_drvinfo(dev, &info);
 127
 128         if (ops->self_test_count)
 129                 info.testinfo_len = ops->self_test_count(dev);
 130         if (ops->get_stats_count)
 131                 info.n_stats = ops->get_stats_count(dev);
 132         if (ops->get_regs_len)
 133                 info.regdump_len = ops->get_regs_len(dev);
 134         if (ops->get_eeprom_len)
 135                 info.eedump_len = ops->get_eeprom_len(dev);
 136
 137         if (copy_to_user(useraddr, &info, sizeof(info)))
 138                 return -EFAULT;
 139         return 0;
 140 }
 141
 142 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 143 {
 144         struct ethtool_regs regs;
 145         struct ethtool_ops *ops = dev->ethtool_ops;
 146         void *regbuf;
 147         int reglen, ret;
 148
 149         if (!ops->get_regs || !ops->get_regs_len)
 150                 return -EOPNOTSUPP;
 151
 152         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 153                 return -EFAULT;
 154
 155         reglen = ops->get_regs_len(dev);
 156         if (regs.len > reglen)
 157                 regs.len = reglen;
 158
 159         regbuf = kmalloc(reglen, GFP_USER);
 160         if (!regbuf)
 161                 return -ENOMEM;
 162
 163         ops->get_regs(dev, &regs, regbuf);
 164
 165         ret = -EFAULT;
 166         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 167                 goto out;
 168         useraddr += offsetof(struct ethtool_regs, data);
 169         if (copy_to_user(useraddr, regbuf, regs.len))
 170                 goto out;
 171         ret = 0;
 172
 173  out:
 174         kfree(regbuf);
 175         return ret;
 176 }
 177
 178 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 179 {
 180         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 181
 182         if (!dev->ethtool_ops->get_wol)
 183                 return -EOPNOTSUPP;
 184
 185         dev->ethtool_ops->get_wol(dev, &wol);
 186
 187         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 188                 return -EFAULT;
 189         return 0;
 190 }
 191
 192 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 193 {
 194         struct ethtool_wolinfo wol;
 195
 196         if (!dev->ethtool_ops->set_wol)
 197                 return -EOPNOTSUPP;
 198
 199         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 200                 return -EFAULT;
 201
 202         return dev->ethtool_ops->set_wol(dev, &wol);
 203 }
 204
 205 static int ethtool_get_msglevel(struct net_device *dev, char __user *useraddr)
 206 {
 207         struct ethtool_value edata = { ETHTOOL_GMSGLVL };
 208
 209         if (!dev->ethtool_ops->get_msglevel)
 210                 return -EOPNOTSUPP;
 211
 212         edata.data = dev->ethtool_ops->get_msglevel(dev);
 213
 214         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 215                 return -EFAULT;
 216         return 0;
 217 }
 218
 219 static int ethtool_set_msglevel(struct net_device *dev, char __user *useraddr)
 220 {
 221         struct ethtool_value edata;
 222
 223         if (!dev->ethtool_ops->set_msglevel)
 224                 return -EOPNOTSUPP;
 225
 226         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 227                 return -EFAULT;
 228
 229         dev->ethtool_ops->set_msglevel(dev, edata.data);
 230         return 0;
 231 }
 232
 233 static int ethtool_nway_reset(struct net_device *dev)
 234 {
 235         if (!dev->ethtool_ops->nway_reset)
 236                 return -EOPNOTSUPP;
 237
 238         return dev->ethtool_ops->nway_reset(dev);
 239 }
 240
 241 static int ethtool_get_link(struct net_device *dev, void __user *useraddr)
 242 {
 243         struct ethtool_value edata = { ETHTOOL_GLINK };
 244
 245         if (!dev->ethtool_ops->get_link)
 246                 return -EOPNOTSUPP;
 247
 248         edata.data = dev->ethtool_ops->get_link(dev);
 249
 250         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 251                 return -EFAULT;
 252         return 0;
 253 }
 254
 255 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 256 {
 257         struct ethtool_eeprom eeprom;
 258         struct ethtool_ops *ops = dev->ethtool_ops;
 259         u8 *data;
 260         int ret;
 261
 262         if (!ops->get_eeprom || !ops->get_eeprom_len)
 263                 return -EOPNOTSUPP;
 264
 265         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 266                 return -EFAULT;
 267
 268         /* Check for wrap and zero */
 269         if (eeprom.offset + eeprom.len <= eeprom.offset)
 270                 return -EINVAL;
 271
 272         /* Check for exceeding total eeprom len */
 273         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 274                 return -EINVAL;
 275
 276         data = kmalloc(eeprom.len, GFP_USER);
 277         if (!data)
 278                 return -ENOMEM;
 279
 280         ret = -EFAULT;
 281         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 282                 goto out;
 283
 284         ret = ops->get_eeprom(dev, &eeprom, data);
 285         if (ret)
 286                 goto out;
 287
 288         ret = -EFAULT;
 289         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 290                 goto out;
 291         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 292                 goto out;
 293         ret = 0;
 294
 295  out:
 296         kfree(data);
 297         return ret;
 298 }
 299
 300 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 301 {
 302         struct ethtool_eeprom eeprom;
 303         struct ethtool_ops *ops = dev->ethtool_ops;
 304         u8 *data;
 305         int ret;
 306
 307         if (!ops->set_eeprom || !ops->get_eeprom_len)
 308                 return -EOPNOTSUPP;
 309
 310         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 311                 return -EFAULT;
 312
 313         /* Check for wrap and zero */
 314         if (eeprom.offset + eeprom.len <= eeprom.offset)
 315                 return -EINVAL;
 316
 317         /* Check for exceeding total eeprom len */
 318         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 319                 return -EINVAL;
 320
 321         data = kmalloc(eeprom.len, GFP_USER);
 322         if (!data)
 323                 return -ENOMEM;
 324
 325         ret = -EFAULT;
 326         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 327                 goto out;
 328
 329         ret = ops->set_eeprom(dev, &eeprom, data);
 330         if (ret)
 331                 goto out;
 332
 333         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 334                 ret = -EFAULT;
 335
 336  out:
 337         kfree(data);
 338         return ret;
 339 }
 340
 341 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 342 {
 343         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 344
 345         if (!dev->ethtool_ops->get_coalesce)
 346                 return -EOPNOTSUPP;
 347
 348         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 349
 350         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 351                 return -EFAULT;
 352         return 0;
 353 }
 354
 355 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 356 {
 357         struct ethtool_coalesce coalesce;
 358
 359         if (!dev->ethtool_ops->set_coalesce)
 360                 return -EOPNOTSUPP;
 361
 362         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 363                 return -EFAULT;
 364
 365         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 366 }
 367
 368 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 369 {
 370         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 371
 372         if (!dev->ethtool_ops->get_ringparam)
 373                 return -EOPNOTSUPP;
 374
 375         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 376
 377         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 378                 return -EFAULT;
 379         return 0;
 380 }
 381
 382 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 383 {
 384         struct ethtool_ringparam ringparam;
 385
 386         if (!dev->ethtool_ops->set_ringparam)
 387                 return -EOPNOTSUPP;
 388
 389         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 390                 return -EFAULT;
 391
 392         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 393 }
 394
 395 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 396 {
 397         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 398
 399         if (!dev->ethtool_ops->get_pauseparam)
 400                 return -EOPNOTSUPP;
 401
 402         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 403
 404         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 405                 return -EFAULT;
 406         return 0;
 407 }
 408
 409 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 410 {
 411         struct ethtool_pauseparam pauseparam;
 412
 413         if (!dev->ethtool_ops->get_pauseparam)
 414                 return -EOPNOTSUPP;
 415
 416         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 417                 return -EFAULT;
 418
 419         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 420 }
 421
 422 static int ethtool_get_rx_csum(struct net_device *dev, char __user *useraddr)
 423 {
 424         struct ethtool_value edata = { ETHTOOL_GRXCSUM };
 425
 426         if (!dev->ethtool_ops->get_rx_csum)
 427                 return -EOPNOTSUPP;
 428
 429         edata.data = dev->ethtool_ops->get_rx_csum(dev);
 430
 431         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 432                 return -EFAULT;
 433         return 0;
 434 }
 435
 436 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
 437 {
 438         struct ethtool_value edata;
 439
 440         if (!dev->ethtool_ops->set_rx_csum)
 441                 return -EOPNOTSUPP;
 442
 443         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 444                 return -EFAULT;
 445
 446         dev->ethtool_ops->set_rx_csum(dev, edata.data);
 447         return 0;
 448 }
 449
 450 static int ethtool_get_tx_csum(struct net_device *dev, char __user *useraddr)
 451 {
 452         struct ethtool_value edata = { ETHTOOL_GTXCSUM };
 453
 454         if (!dev->ethtool_ops->get_tx_csum)
 455                 return -EOPNOTSUPP;
 456
 457         edata.data = dev->ethtool_ops->get_tx_csum(dev);
 458
 459         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 460                 return -EFAULT;
 461         return 0;
 462 }
 463
 464 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 465 {
 466         int err;
 467
 468         if (!data && dev->ethtool_ops->set_tso) {
 469                 err = dev->ethtool_ops->set_tso(dev, 0);
 470                 if (err)
 471                         return err;
 472         }
 473
 474         return dev->ethtool_ops->set_sg(dev, data);
 475 }
 476
 477 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 478 {
 479         struct ethtool_value edata;
 480         int err;
 481
 482         if (!dev->ethtool_ops->set_tx_csum)
 483                 return -EOPNOTSUPP;
 484
 485         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 486                 return -EFAULT;
 487
 488         if (!edata.data && dev->ethtool_ops->set_sg) {
 489                 err = __ethtool_set_sg(dev, 0);
 490                 if (err)
 491                         return err;
 492         }
 493
 494         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 495 }
 496
 497 static int ethtool_get_sg(struct net_device *dev, char __user *useraddr)
 498 {
 499         struct ethtool_value edata = { ETHTOOL_GSG };
 500
 501         if (!dev->ethtool_ops->get_sg)
 502                 return -EOPNOTSUPP;
 503
 504         edata.data = dev->ethtool_ops->get_sg(dev);
 505
 506         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 507                 return -EFAULT;
 508         return 0;
 509 }
 510
 511 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 512 {
 513         struct ethtool_value edata;
 514
 515         if (!dev->ethtool_ops->set_sg)
 516                 return -EOPNOTSUPP;
 517
 518         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 519                 return -EFAULT;
 520
 521         if (edata.data &&
 522             !(dev->features & (NETIF_F_IP_CSUM |
 523                                NETIF_F_NO_CSUM |
 524                                NETIF_F_HW_CSUM)))
 525                 return -EINVAL;
 526
 527         return __ethtool_set_sg(dev, edata.data);
 528 }
 529
 530 static int ethtool_get_tso(struct net_device *dev, char __user *useraddr)
 531 {
 532         struct ethtool_value edata = { ETHTOOL_GTSO };
 533
 534         if (!dev->ethtool_ops->get_tso)
 535                 return -EOPNOTSUPP;
 536
 537         edata.data = dev->ethtool_ops->get_tso(dev);
 538
 539         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 540                 return -EFAULT;
 541         return 0;
 542 }
 543
 544 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 545 {
 546         struct ethtool_value edata;
 547
 548         if (!dev->ethtool_ops->set_tso)
 549                 return -EOPNOTSUPP;
 550
 551         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 552                 return -EFAULT;
 553
 554         if (edata.data && !(dev->features & NETIF_F_SG))
 555                 return -EINVAL;
 556
 557         return dev->ethtool_ops->set_tso(dev, edata.data);
 558 }
 559
 560 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 561 {
 562         struct ethtool_test test;
 563         struct ethtool_ops *ops = dev->ethtool_ops;
 564         u64 *data;
 565         int ret;
 566
 567         if (!ops->self_test || !ops->self_test_count)
 568                 return -EOPNOTSUPP;
 569
 570         if (copy_from_user(&test, useraddr, sizeof(test)))
 571                 return -EFAULT;
 572
 573         test.len = ops->self_test_count(dev);
 574         data = kmalloc(test.len * sizeof(u64), GFP_USER);
 575         if (!data)
 576                 return -ENOMEM;
 577
 578         ops->self_test(dev, &test, data);
 579
 580         ret = -EFAULT;
 581         if (copy_to_user(useraddr, &test, sizeof(test)))
 582                 goto out;
 583         useraddr += sizeof(test);
 584         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 585                 goto out;
 586         ret = 0;
 587
 588  out:
 589         kfree(data);
 590         return ret;
 591 }
 592
 593 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 594 {
 595         struct ethtool_gstrings gstrings;
 596         struct ethtool_ops *ops = dev->ethtool_ops;
 597         u8 *data;
 598         int ret;
 599
 600         if (!ops->get_strings)
 601                 return -EOPNOTSUPP;
 602
 603         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 604                 return -EFAULT;
 605
 606         switch (gstrings.string_set) {
 607         case ETH_SS_TEST:
 608                 if (!ops->self_test_count)
 609                         return -EOPNOTSUPP;
 610                 gstrings.len = ops->self_test_count(dev);
 611                 break;
 612         case ETH_SS_STATS:
 613                 if (!ops->get_stats_count)
 614                         return -EOPNOTSUPP;
 615                 gstrings.len = ops->get_stats_count(dev);
 616                 break;
 617         default:
 618                 return -EINVAL;
 619         }
 620
 621         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 622         if (!data)
 623                 return -ENOMEM;
 624
 625         ops->get_strings(dev, gstrings.string_set, data);
 626
 627         ret = -EFAULT;
 628         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 629                 goto out;
 630         useraddr += sizeof(gstrings);
 631         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 632                 goto out;
 633         ret = 0;
 634
 635  out:
 636         kfree(data);
 637         return ret;
 638 }
 639
 640 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 641 {
 642         struct ethtool_value id;
 643
 644         if (!dev->ethtool_ops->phys_id)
 645                 return -EOPNOTSUPP;
 646
 647         if (copy_from_user(&id, useraddr, sizeof(id)))
 648                 return -EFAULT;
 649
 650         return dev->ethtool_ops->phys_id(dev, id.data);
 651 }
 652
 653 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 654 {
 655         struct ethtool_stats stats;
 656         struct ethtool_ops *ops = dev->ethtool_ops;
 657         u64 *data;
 658         int ret;
 659
 660         if (!ops->get_ethtool_stats || !ops->get_stats_count)
 661                 return -EOPNOTSUPP;
 662
 663         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 664                 return -EFAULT;
 665
 666         stats.n_stats = ops->get_stats_count(dev);
 667         data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
 668         if (!data)
 669                 return -ENOMEM;
 670
 671         ops->get_ethtool_stats(dev, &stats, data);
 672
 673         ret = -EFAULT;
 674         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 675                 goto out;
 676         useraddr += sizeof(stats);
 677         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 678                 goto out;
 679         ret = 0;
 680
 681  out:
 682         kfree(data);
 683         return ret;
 684 }
 685
 686 /* The main entry point in this file.  Called from net/core/dev.c */
 687
 688 int dev_ethtool(struct ifreq *ifr)
 689 {
 690         struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
 691         void __user *useraddr = ifr->ifr_data;
 692         u32 ethcmd;
 693         int rc;
 694         unsigned long old_features;
 695
 696         /*
 697          * XXX: This can be pushed down into the ethtool_* handlers that
 698          * need it.  Keep existing behaviour for the moment.
 699          */
 700         if (!capable(CAP_NET_ADMIN))
 701                 return -EPERM;
 702
 703         if (!dev || !netif_device_present(dev))
 704                 return -ENODEV;
 705
 706         if (!dev->ethtool_ops)
 707                 goto ioctl;
 708
 709         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 710                 return -EFAULT;
 711
 712         if(dev->ethtool_ops->begin)
 713                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 714                         return rc;
 715
 716         old_features = dev->features;
 717
 718         switch (ethcmd) {
 719         case ETHTOOL_GSET:
 720                 rc = ethtool_get_settings(dev, useraddr);
 721                 break;
 722         case ETHTOOL_SSET:
 723                 rc = ethtool_set_settings(dev, useraddr);
 724                 break;
 725         case ETHTOOL_GDRVINFO:
 726                 rc = ethtool_get_drvinfo(dev, useraddr);
 727                 break;
 728         case ETHTOOL_GREGS:
 729                 rc = ethtool_get_regs(dev, useraddr);
 730                 break;
 731         case ETHTOOL_GWOL:
 732                 rc = ethtool_get_wol(dev, useraddr);
 733                 break;
 734         case ETHTOOL_SWOL:
 735                 rc = ethtool_set_wol(dev, useraddr);
 736                 break;
 737         case ETHTOOL_GMSGLVL:
 738                 rc = ethtool_get_msglevel(dev, useraddr);
 739                 break;
 740         case ETHTOOL_SMSGLVL:
 741                 rc = ethtool_set_msglevel(dev, useraddr);
 742                 break;
 743         case ETHTOOL_NWAY_RST:
 744                 rc = ethtool_nway_reset(dev);
 745                 break;
 746         case ETHTOOL_GLINK:
 747                 rc = ethtool_get_link(dev, useraddr);
 748                 break;
 749         case ETHTOOL_GEEPROM:
 750                 rc = ethtool_get_eeprom(dev, useraddr);
 751                 break;
 752         case ETHTOOL_SEEPROM:
 753                 rc = ethtool_set_eeprom(dev, useraddr);
 754                 break;
 755         case ETHTOOL_GCOALESCE:
 756                 rc = ethtool_get_coalesce(dev, useraddr);
 757                 break;
 758         case ETHTOOL_SCOALESCE:
 759                 rc = ethtool_set_coalesce(dev, useraddr);
 760                 break;
 761         case ETHTOOL_GRINGPARAM:
 762                 rc = ethtool_get_ringparam(dev, useraddr);
 763                 break;
 764         case ETHTOOL_SRINGPARAM:
 765                 rc = ethtool_set_ringparam(dev, useraddr);
 766                 break;
 767         case ETHTOOL_GPAUSEPARAM:
 768                 rc = ethtool_get_pauseparam(dev, useraddr);
 769                 break;
 770         case ETHTOOL_SPAUSEPARAM:
 771                 rc = ethtool_set_pauseparam(dev, useraddr);
 772                 break;
 773         case ETHTOOL_GRXCSUM:
 774                 rc = ethtool_get_rx_csum(dev, useraddr);
 775                 break;
 776         case ETHTOOL_SRXCSUM:
 777                 rc = ethtool_set_rx_csum(dev, useraddr);
 778                 break;
 779         case ETHTOOL_GTXCSUM:
 780                 rc = ethtool_get_tx_csum(dev, useraddr);
 781                 break;
 782         case ETHTOOL_STXCSUM:
 783                 rc = ethtool_set_tx_csum(dev, useraddr);
 784                 break;
 785         case ETHTOOL_GSG:
 786                 rc = ethtool_get_sg(dev, useraddr);
 787                 break;
 788         case ETHTOOL_SSG:
 789                 rc = ethtool_set_sg(dev, useraddr);
 790                 break;
 791         case ETHTOOL_GTSO:
 792                 rc = ethtool_get_tso(dev, useraddr);
 793                 break;
 794         case ETHTOOL_STSO:
 795                 rc = ethtool_set_tso(dev, useraddr);
 796                 break;
 797         case ETHTOOL_TEST:
 798                 rc = ethtool_self_test(dev, useraddr);
 799                 break;
 800         case ETHTOOL_GSTRINGS:
 801                 rc = ethtool_get_strings(dev, useraddr);
 802                 break;
 803         case ETHTOOL_PHYS_ID:
 804                 rc = ethtool_phys_id(dev, useraddr);
 805                 break;
 806         case ETHTOOL_GSTATS:
 807                 rc = ethtool_get_stats(dev, useraddr);
 808                 break;
 809         default:
 810                 rc =  -EOPNOTSUPP;
 811         }
 812
 813         if(dev->ethtool_ops->complete)
 814                 dev->ethtool_ops->complete(dev);
 815
 816         if (old_features != dev->features)
 817                 netdev_features_change(dev);
 818
 819         return rc;
 820
 821  ioctl:
 822         if (dev->do_ioctl)
 823                 return dev->do_ioctl(dev, ifr, SIOCETHTOOL);
 824         return -EOPNOTSUPP;
 825 }
 826
 827 EXPORT_SYMBOL(dev_ethtool);
 828 EXPORT_SYMBOL(ethtool_op_get_link);
 829 EXPORT_SYMBOL(ethtool_op_get_sg);
 830 EXPORT_SYMBOL(ethtool_op_get_tso);
 831 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
 832 EXPORT_SYMBOL(ethtool_op_set_sg);
 833 EXPORT_SYMBOL(ethtool_op_set_tso);
 834 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
 835 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);