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 int ethtool_op_get_perm_addr(struct net_device *dev, struct ethtool_perm_addr *addr, u8 *data)
  85 {
  86         unsigned char len = dev->addr_len;
  87         if ( addr->size < len )
  88                 return -ETOOSMALL;
  89
  90         addr->size = len;
  91         memcpy(data, dev->perm_addr, len);
  92         return 0;
  93 }
  94
  95
  96 /* Handlers for each ethtool command */
  97
  98 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
  99 {
 100         struct ethtool_cmd cmd = { ETHTOOL_GSET };
 101         int err;
 102
 103         if (!dev->ethtool_ops->get_settings)
 104                 return -EOPNOTSUPP;
 105
 106         err = dev->ethtool_ops->get_settings(dev, &cmd);
 107         if (err < 0)
 108                 return err;
 109
 110         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 111                 return -EFAULT;
 112         return 0;
 113 }
 114
 115 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 116 {
 117         struct ethtool_cmd cmd;
 118
 119         if (!dev->ethtool_ops->set_settings)
 120                 return -EOPNOTSUPP;
 121
 122         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 123                 return -EFAULT;
 124
 125         return dev->ethtool_ops->set_settings(dev, &cmd);
 126 }
 127
 128 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
 129 {
 130         struct ethtool_drvinfo info;
 131         struct ethtool_ops *ops = dev->ethtool_ops;
 132
 133         if (!ops->get_drvinfo)
 134                 return -EOPNOTSUPP;
 135
 136         memset(&info, 0, sizeof(info));
 137         info.cmd = ETHTOOL_GDRVINFO;
 138         ops->get_drvinfo(dev, &info);
 139
 140         if (ops->self_test_count)
 141                 info.testinfo_len = ops->self_test_count(dev);
 142         if (ops->get_stats_count)
 143                 info.n_stats = ops->get_stats_count(dev);
 144         if (ops->get_regs_len)
 145                 info.regdump_len = ops->get_regs_len(dev);
 146         if (ops->get_eeprom_len)
 147                 info.eedump_len = ops->get_eeprom_len(dev);
 148
 149         if (copy_to_user(useraddr, &info, sizeof(info)))
 150                 return -EFAULT;
 151         return 0;
 152 }
 153
 154 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 155 {
 156         struct ethtool_regs regs;
 157         struct ethtool_ops *ops = dev->ethtool_ops;
 158         void *regbuf;
 159         int reglen, ret;
 160
 161         if (!ops->get_regs || !ops->get_regs_len)
 162                 return -EOPNOTSUPP;
 163
 164         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 165                 return -EFAULT;
 166
 167         reglen = ops->get_regs_len(dev);
 168         if (regs.len > reglen)
 169                 regs.len = reglen;
 170
 171         regbuf = kmalloc(reglen, GFP_USER);
 172         if (!regbuf)
 173                 return -ENOMEM;
 174
 175         ops->get_regs(dev, &regs, regbuf);
 176
 177         ret = -EFAULT;
 178         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 179                 goto out;
 180         useraddr += offsetof(struct ethtool_regs, data);
 181         if (copy_to_user(useraddr, regbuf, regs.len))
 182                 goto out;
 183         ret = 0;
 184
 185  out:
 186         kfree(regbuf);
 187         return ret;
 188 }
 189
 190 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 191 {
 192         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 193
 194         if (!dev->ethtool_ops->get_wol)
 195                 return -EOPNOTSUPP;
 196
 197         dev->ethtool_ops->get_wol(dev, &wol);
 198
 199         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 200                 return -EFAULT;
 201         return 0;
 202 }
 203
 204 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 205 {
 206         struct ethtool_wolinfo wol;
 207
 208         if (!dev->ethtool_ops->set_wol)
 209                 return -EOPNOTSUPP;
 210
 211         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 212                 return -EFAULT;
 213
 214         return dev->ethtool_ops->set_wol(dev, &wol);
 215 }
 216
 217 static int ethtool_get_msglevel(struct net_device *dev, char __user *useraddr)
 218 {
 219         struct ethtool_value edata = { ETHTOOL_GMSGLVL };
 220
 221         if (!dev->ethtool_ops->get_msglevel)
 222                 return -EOPNOTSUPP;
 223
 224         edata.data = dev->ethtool_ops->get_msglevel(dev);
 225
 226         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 227                 return -EFAULT;
 228         return 0;
 229 }
 230
 231 static int ethtool_set_msglevel(struct net_device *dev, char __user *useraddr)
 232 {
 233         struct ethtool_value edata;
 234
 235         if (!dev->ethtool_ops->set_msglevel)
 236                 return -EOPNOTSUPP;
 237
 238         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 239                 return -EFAULT;
 240
 241         dev->ethtool_ops->set_msglevel(dev, edata.data);
 242         return 0;
 243 }
 244
 245 static int ethtool_nway_reset(struct net_device *dev)
 246 {
 247         if (!dev->ethtool_ops->nway_reset)
 248                 return -EOPNOTSUPP;
 249
 250         return dev->ethtool_ops->nway_reset(dev);
 251 }
 252
 253 static int ethtool_get_link(struct net_device *dev, void __user *useraddr)
 254 {
 255         struct ethtool_value edata = { ETHTOOL_GLINK };
 256
 257         if (!dev->ethtool_ops->get_link)
 258                 return -EOPNOTSUPP;
 259
 260         edata.data = dev->ethtool_ops->get_link(dev);
 261
 262         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 263                 return -EFAULT;
 264         return 0;
 265 }
 266
 267 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 268 {
 269         struct ethtool_eeprom eeprom;
 270         struct ethtool_ops *ops = dev->ethtool_ops;
 271         u8 *data;
 272         int ret;
 273
 274         if (!ops->get_eeprom || !ops->get_eeprom_len)
 275                 return -EOPNOTSUPP;
 276
 277         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 278                 return -EFAULT;
 279
 280         /* Check for wrap and zero */
 281         if (eeprom.offset + eeprom.len <= eeprom.offset)
 282                 return -EINVAL;
 283
 284         /* Check for exceeding total eeprom len */
 285         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 286                 return -EINVAL;
 287
 288         data = kmalloc(eeprom.len, GFP_USER);
 289         if (!data)
 290                 return -ENOMEM;
 291
 292         ret = -EFAULT;
 293         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 294                 goto out;
 295
 296         ret = ops->get_eeprom(dev, &eeprom, data);
 297         if (ret)
 298                 goto out;
 299
 300         ret = -EFAULT;
 301         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 302                 goto out;
 303         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 304                 goto out;
 305         ret = 0;
 306
 307  out:
 308         kfree(data);
 309         return ret;
 310 }
 311
 312 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 313 {
 314         struct ethtool_eeprom eeprom;
 315         struct ethtool_ops *ops = dev->ethtool_ops;
 316         u8 *data;
 317         int ret;
 318
 319         if (!ops->set_eeprom || !ops->get_eeprom_len)
 320                 return -EOPNOTSUPP;
 321
 322         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 323                 return -EFAULT;
 324
 325         /* Check for wrap and zero */
 326         if (eeprom.offset + eeprom.len <= eeprom.offset)
 327                 return -EINVAL;
 328
 329         /* Check for exceeding total eeprom len */
 330         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 331                 return -EINVAL;
 332
 333         data = kmalloc(eeprom.len, GFP_USER);
 334         if (!data)
 335                 return -ENOMEM;
 336
 337         ret = -EFAULT;
 338         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 339                 goto out;
 340
 341         ret = ops->set_eeprom(dev, &eeprom, data);
 342         if (ret)
 343                 goto out;
 344
 345         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 346                 ret = -EFAULT;
 347
 348  out:
 349         kfree(data);
 350         return ret;
 351 }
 352
 353 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 354 {
 355         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 356
 357         if (!dev->ethtool_ops->get_coalesce)
 358                 return -EOPNOTSUPP;
 359
 360         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 361
 362         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 363                 return -EFAULT;
 364         return 0;
 365 }
 366
 367 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 368 {
 369         struct ethtool_coalesce coalesce;
 370
 371         if (!dev->ethtool_ops->set_coalesce)
 372                 return -EOPNOTSUPP;
 373
 374         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 375                 return -EFAULT;
 376
 377         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 378 }
 379
 380 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 381 {
 382         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 383
 384         if (!dev->ethtool_ops->get_ringparam)
 385                 return -EOPNOTSUPP;
 386
 387         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 388
 389         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 390                 return -EFAULT;
 391         return 0;
 392 }
 393
 394 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 395 {
 396         struct ethtool_ringparam ringparam;
 397
 398         if (!dev->ethtool_ops->set_ringparam)
 399                 return -EOPNOTSUPP;
 400
 401         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 402                 return -EFAULT;
 403
 404         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 405 }
 406
 407 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 408 {
 409         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 410
 411         if (!dev->ethtool_ops->get_pauseparam)
 412                 return -EOPNOTSUPP;
 413
 414         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 415
 416         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 417                 return -EFAULT;
 418         return 0;
 419 }
 420
 421 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 422 {
 423         struct ethtool_pauseparam pauseparam;
 424
 425         if (!dev->ethtool_ops->get_pauseparam)
 426                 return -EOPNOTSUPP;
 427
 428         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 429                 return -EFAULT;
 430
 431         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 432 }
 433
 434 static int ethtool_get_rx_csum(struct net_device *dev, char __user *useraddr)
 435 {
 436         struct ethtool_value edata = { ETHTOOL_GRXCSUM };
 437
 438         if (!dev->ethtool_ops->get_rx_csum)
 439                 return -EOPNOTSUPP;
 440
 441         edata.data = dev->ethtool_ops->get_rx_csum(dev);
 442
 443         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 444                 return -EFAULT;
 445         return 0;
 446 }
 447
 448 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
 449 {
 450         struct ethtool_value edata;
 451
 452         if (!dev->ethtool_ops->set_rx_csum)
 453                 return -EOPNOTSUPP;
 454
 455         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 456                 return -EFAULT;
 457
 458         dev->ethtool_ops->set_rx_csum(dev, edata.data);
 459         return 0;
 460 }
 461
 462 static int ethtool_get_tx_csum(struct net_device *dev, char __user *useraddr)
 463 {
 464         struct ethtool_value edata = { ETHTOOL_GTXCSUM };
 465
 466         if (!dev->ethtool_ops->get_tx_csum)
 467                 return -EOPNOTSUPP;
 468
 469         edata.data = dev->ethtool_ops->get_tx_csum(dev);
 470
 471         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 472                 return -EFAULT;
 473         return 0;
 474 }
 475
 476 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 477 {
 478         int err;
 479
 480         if (!data && dev->ethtool_ops->set_tso) {
 481                 err = dev->ethtool_ops->set_tso(dev, 0);
 482                 if (err)
 483                         return err;
 484         }
 485
 486         return dev->ethtool_ops->set_sg(dev, data);
 487 }
 488
 489 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 490 {
 491         struct ethtool_value edata;
 492         int err;
 493
 494         if (!dev->ethtool_ops->set_tx_csum)
 495                 return -EOPNOTSUPP;
 496
 497         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 498                 return -EFAULT;
 499
 500         if (!edata.data && dev->ethtool_ops->set_sg) {
 501                 err = __ethtool_set_sg(dev, 0);
 502                 if (err)
 503                         return err;
 504         }
 505
 506         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 507 }
 508
 509 static int ethtool_get_sg(struct net_device *dev, char __user *useraddr)
 510 {
 511         struct ethtool_value edata = { ETHTOOL_GSG };
 512
 513         if (!dev->ethtool_ops->get_sg)
 514                 return -EOPNOTSUPP;
 515
 516         edata.data = dev->ethtool_ops->get_sg(dev);
 517
 518         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 519                 return -EFAULT;
 520         return 0;
 521 }
 522
 523 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 524 {
 525         struct ethtool_value edata;
 526
 527         if (!dev->ethtool_ops->set_sg)
 528                 return -EOPNOTSUPP;
 529
 530         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 531                 return -EFAULT;
 532
 533         if (edata.data &&
 534             !(dev->features & (NETIF_F_IP_CSUM |
 535                                NETIF_F_NO_CSUM |
 536                                NETIF_F_HW_CSUM)))
 537                 return -EINVAL;
 538
 539         return __ethtool_set_sg(dev, edata.data);
 540 }
 541
 542 static int ethtool_get_tso(struct net_device *dev, char __user *useraddr)
 543 {
 544         struct ethtool_value edata = { ETHTOOL_GTSO };
 545
 546         if (!dev->ethtool_ops->get_tso)
 547                 return -EOPNOTSUPP;
 548
 549         edata.data = dev->ethtool_ops->get_tso(dev);
 550
 551         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 552                 return -EFAULT;
 553         return 0;
 554 }
 555
 556 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 557 {
 558         struct ethtool_value edata;
 559
 560         if (!dev->ethtool_ops->set_tso)
 561                 return -EOPNOTSUPP;
 562
 563         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 564                 return -EFAULT;
 565
 566         if (edata.data && !(dev->features & NETIF_F_SG))
 567                 return -EINVAL;
 568
 569         return dev->ethtool_ops->set_tso(dev, edata.data);
 570 }
 571
 572 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 573 {
 574         struct ethtool_test test;
 575         struct ethtool_ops *ops = dev->ethtool_ops;
 576         u64 *data;
 577         int ret;
 578
 579         if (!ops->self_test || !ops->self_test_count)
 580                 return -EOPNOTSUPP;
 581
 582         if (copy_from_user(&test, useraddr, sizeof(test)))
 583                 return -EFAULT;
 584
 585         test.len = ops->self_test_count(dev);
 586         data = kmalloc(test.len * sizeof(u64), GFP_USER);
 587         if (!data)
 588                 return -ENOMEM;
 589
 590         ops->self_test(dev, &test, data);
 591
 592         ret = -EFAULT;
 593         if (copy_to_user(useraddr, &test, sizeof(test)))
 594                 goto out;
 595         useraddr += sizeof(test);
 596         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 597                 goto out;
 598         ret = 0;
 599
 600  out:
 601         kfree(data);
 602         return ret;
 603 }
 604
 605 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 606 {
 607         struct ethtool_gstrings gstrings;
 608         struct ethtool_ops *ops = dev->ethtool_ops;
 609         u8 *data;
 610         int ret;
 611
 612         if (!ops->get_strings)
 613                 return -EOPNOTSUPP;
 614
 615         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 616                 return -EFAULT;
 617
 618         switch (gstrings.string_set) {
 619         case ETH_SS_TEST:
 620                 if (!ops->self_test_count)
 621                         return -EOPNOTSUPP;
 622                 gstrings.len = ops->self_test_count(dev);
 623                 break;
 624         case ETH_SS_STATS:
 625                 if (!ops->get_stats_count)
 626                         return -EOPNOTSUPP;
 627                 gstrings.len = ops->get_stats_count(dev);
 628                 break;
 629         default:
 630                 return -EINVAL;
 631         }
 632
 633         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 634         if (!data)
 635                 return -ENOMEM;
 636
 637         ops->get_strings(dev, gstrings.string_set, data);
 638
 639         ret = -EFAULT;
 640         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 641                 goto out;
 642         useraddr += sizeof(gstrings);
 643         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 644                 goto out;
 645         ret = 0;
 646
 647  out:
 648         kfree(data);
 649         return ret;
 650 }
 651
 652 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 653 {
 654         struct ethtool_value id;
 655
 656         if (!dev->ethtool_ops->phys_id)
 657                 return -EOPNOTSUPP;
 658
 659         if (copy_from_user(&id, useraddr, sizeof(id)))
 660                 return -EFAULT;
 661
 662         return dev->ethtool_ops->phys_id(dev, id.data);
 663 }
 664
 665 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 666 {
 667         struct ethtool_stats stats;
 668         struct ethtool_ops *ops = dev->ethtool_ops;
 669         u64 *data;
 670         int ret;
 671
 672         if (!ops->get_ethtool_stats || !ops->get_stats_count)
 673                 return -EOPNOTSUPP;
 674
 675         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 676                 return -EFAULT;
 677
 678         stats.n_stats = ops->get_stats_count(dev);
 679         data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
 680         if (!data)
 681                 return -ENOMEM;
 682
 683         ops->get_ethtool_stats(dev, &stats, data);
 684
 685         ret = -EFAULT;
 686         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 687                 goto out;
 688         useraddr += sizeof(stats);
 689         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 690                 goto out;
 691         ret = 0;
 692
 693  out:
 694         kfree(data);
 695         return ret;
 696 }
 697
 698 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 699 {
 700         struct ethtool_perm_addr epaddr;
 701         u8 *data;
 702         int ret;
 703
 704         if (!dev->ethtool_ops->get_perm_addr)
 705                 return -EOPNOTSUPP;
 706
 707         if (copy_from_user(&epaddr,useraddr,sizeof(epaddr)))
 708                 return -EFAULT;
 709
 710         data = kmalloc(epaddr.size, GFP_USER);
 711         if (!data)
 712                 return -ENOMEM;
 713
 714         ret = dev->ethtool_ops->get_perm_addr(dev,&epaddr,data);
 715         if (ret)
 716                 return ret;
 717
 718         ret = -EFAULT;
 719         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 720                 goto out;
 721         useraddr += sizeof(epaddr);
 722         if (copy_to_user(useraddr, data, epaddr.size))
 723                 goto out;
 724         ret = 0;
 725
 726  out:
 727         kfree(data);
 728         return ret;
 729 }
 730
 731 /* The main entry point in this file.  Called from net/core/dev.c */
 732
 733 int dev_ethtool(struct ifreq *ifr)
 734 {
 735         struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
 736         void __user *useraddr = ifr->ifr_data;
 737         u32 ethcmd;
 738         int rc;
 739         unsigned long old_features;
 740
 741         /*
 742          * XXX: This can be pushed down into the ethtool_* handlers that
 743          * need it.  Keep existing behaviour for the moment.
 744          */
 745         if (!capable(CAP_NET_ADMIN))
 746                 return -EPERM;
 747
 748         if (!dev || !netif_device_present(dev))
 749                 return -ENODEV;
 750
 751         if (!dev->ethtool_ops)
 752                 goto ioctl;
 753
 754         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 755                 return -EFAULT;
 756
 757         if(dev->ethtool_ops->begin)
 758                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 759                         return rc;
 760
 761         old_features = dev->features;
 762
 763         switch (ethcmd) {
 764         case ETHTOOL_GSET:
 765                 rc = ethtool_get_settings(dev, useraddr);
 766                 break;
 767         case ETHTOOL_SSET:
 768                 rc = ethtool_set_settings(dev, useraddr);
 769                 break;
 770         case ETHTOOL_GDRVINFO:
 771                 rc = ethtool_get_drvinfo(dev, useraddr);
 772                 break;
 773         case ETHTOOL_GREGS:
 774                 rc = ethtool_get_regs(dev, useraddr);
 775                 break;
 776         case ETHTOOL_GWOL:
 777                 rc = ethtool_get_wol(dev, useraddr);
 778                 break;
 779         case ETHTOOL_SWOL:
 780                 rc = ethtool_set_wol(dev, useraddr);
 781                 break;
 782         case ETHTOOL_GMSGLVL:
 783                 rc = ethtool_get_msglevel(dev, useraddr);
 784                 break;
 785         case ETHTOOL_SMSGLVL:
 786                 rc = ethtool_set_msglevel(dev, useraddr);
 787                 break;
 788         case ETHTOOL_NWAY_RST:
 789                 rc = ethtool_nway_reset(dev);
 790                 break;
 791         case ETHTOOL_GLINK:
 792                 rc = ethtool_get_link(dev, useraddr);
 793                 break;
 794         case ETHTOOL_GEEPROM:
 795                 rc = ethtool_get_eeprom(dev, useraddr);
 796                 break;
 797         case ETHTOOL_SEEPROM:
 798                 rc = ethtool_set_eeprom(dev, useraddr);
 799                 break;
 800         case ETHTOOL_GCOALESCE:
 801                 rc = ethtool_get_coalesce(dev, useraddr);
 802                 break;
 803         case ETHTOOL_SCOALESCE:
 804                 rc = ethtool_set_coalesce(dev, useraddr);
 805                 break;
 806         case ETHTOOL_GRINGPARAM:
 807                 rc = ethtool_get_ringparam(dev, useraddr);
 808                 break;
 809         case ETHTOOL_SRINGPARAM:
 810                 rc = ethtool_set_ringparam(dev, useraddr);
 811                 break;
 812         case ETHTOOL_GPAUSEPARAM:
 813                 rc = ethtool_get_pauseparam(dev, useraddr);
 814                 break;
 815         case ETHTOOL_SPAUSEPARAM:
 816                 rc = ethtool_set_pauseparam(dev, useraddr);
 817                 break;
 818         case ETHTOOL_GRXCSUM:
 819                 rc = ethtool_get_rx_csum(dev, useraddr);
 820                 break;
 821         case ETHTOOL_SRXCSUM:
 822                 rc = ethtool_set_rx_csum(dev, useraddr);
 823                 break;
 824         case ETHTOOL_GTXCSUM:
 825                 rc = ethtool_get_tx_csum(dev, useraddr);
 826                 break;
 827         case ETHTOOL_STXCSUM:
 828                 rc = ethtool_set_tx_csum(dev, useraddr);
 829                 break;
 830         case ETHTOOL_GSG:
 831                 rc = ethtool_get_sg(dev, useraddr);
 832                 break;
 833         case ETHTOOL_SSG:
 834                 rc = ethtool_set_sg(dev, useraddr);
 835                 break;
 836         case ETHTOOL_GTSO:
 837                 rc = ethtool_get_tso(dev, useraddr);
 838                 break;
 839         case ETHTOOL_STSO:
 840                 rc = ethtool_set_tso(dev, useraddr);
 841                 break;
 842         case ETHTOOL_TEST:
 843                 rc = ethtool_self_test(dev, useraddr);
 844                 break;
 845         case ETHTOOL_GSTRINGS:
 846                 rc = ethtool_get_strings(dev, useraddr);
 847                 break;
 848         case ETHTOOL_PHYS_ID:
 849                 rc = ethtool_phys_id(dev, useraddr);
 850                 break;
 851         case ETHTOOL_GSTATS:
 852                 rc = ethtool_get_stats(dev, useraddr);
 853                 break;
 854         case ETHTOOL_GPERMADDR:
 855                 rc = ethtool_get_perm_addr(dev, useraddr);
 856                 break;
 857         default:
 858                 rc =  -EOPNOTSUPP;
 859         }
 860
 861         if(dev->ethtool_ops->complete)
 862                 dev->ethtool_ops->complete(dev);
 863
 864         if (old_features != dev->features)
 865                 netdev_features_change(dev);
 866
 867         return rc;
 868
 869  ioctl:
 870         if (dev->do_ioctl)
 871                 return dev->do_ioctl(dev, ifr, SIOCETHTOOL);
 872         return -EOPNOTSUPP;
 873 }
 874
 875 EXPORT_SYMBOL(dev_ethtool);
 876 EXPORT_SYMBOL(ethtool_op_get_link);
 877 EXPORT_SYMBOL_GPL(ethtool_op_get_perm_addr);
 878 EXPORT_SYMBOL(ethtool_op_get_sg);
 879 EXPORT_SYMBOL(ethtool_op_get_tso);
 880 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
 881 EXPORT_SYMBOL(ethtool_op_set_sg);
 882 EXPORT_SYMBOL(ethtool_op_set_tso);
 883 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
 884 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);