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/capability.h>
  15 #include <linux/errno.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/netdevice.h>
  18 #include <asm/uaccess.h>
  19
  20 /*
  21  * Some useful ethtool_ops methods that're device independent.
  22  * If we find that all drivers want to do the same thing here,
  23  * we can turn these into dev_() function calls.
  24  */
  25
  26 u32 ethtool_op_get_link(struct net_device *dev)
  27 {
  28         return netif_carrier_ok(dev) ? 1 : 0;
  29 }
  30
  31 u32 ethtool_op_get_tx_csum(struct net_device *dev)
  32 {
  33         return (dev->features & NETIF_F_ALL_CSUM) != 0;
  34 }
  35
  36 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
  37 {
  38         if (data)
  39                 dev->features |= NETIF_F_IP_CSUM;
  40         else
  41                 dev->features &= ~NETIF_F_IP_CSUM;
  42
  43         return 0;
  44 }
  45
  46 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
  47 {
  48         if (data)
  49                 dev->features |= NETIF_F_HW_CSUM;
  50         else
  51                 dev->features &= ~NETIF_F_HW_CSUM;
  52
  53         return 0;
  54 }
  55 u32 ethtool_op_get_sg(struct net_device *dev)
  56 {
  57         return (dev->features & NETIF_F_SG) != 0;
  58 }
  59
  60 int ethtool_op_set_sg(struct net_device *dev, u32 data)
  61 {
  62         if (data)
  63                 dev->features |= NETIF_F_SG;
  64         else
  65                 dev->features &= ~NETIF_F_SG;
  66
  67         return 0;
  68 }
  69
  70 u32 ethtool_op_get_tso(struct net_device *dev)
  71 {
  72         return (dev->features & NETIF_F_TSO) != 0;
  73 }
  74
  75 int ethtool_op_set_tso(struct net_device *dev, u32 data)
  76 {
  77         if (data)
  78                 dev->features |= NETIF_F_TSO;
  79         else
  80                 dev->features &= ~NETIF_F_TSO;
  81
  82         return 0;
  83 }
  84
  85 int ethtool_op_get_perm_addr(struct net_device *dev, struct ethtool_perm_addr *addr, u8 *data)
  86 {
  87         unsigned char len = dev->addr_len;
  88         if ( addr->size < len )
  89                 return -ETOOSMALL;
  90
  91         addr->size = len;
  92         memcpy(data, dev->perm_addr, len);
  93         return 0;
  94 }
  95
  96
  97 u32 ethtool_op_get_ufo(struct net_device *dev)
  98 {
  99         return (dev->features & NETIF_F_UFO) != 0;
 100 }
 101
 102 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
 103 {
 104         if (data)
 105                 dev->features |= NETIF_F_UFO;
 106         else
 107                 dev->features &= ~NETIF_F_UFO;
 108         return 0;
 109 }
 110
 111 /* Handlers for each ethtool command */
 112
 113 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 114 {
 115         struct ethtool_cmd cmd = { ETHTOOL_GSET };
 116         int err;
 117
 118         if (!dev->ethtool_ops->get_settings)
 119                 return -EOPNOTSUPP;
 120
 121         err = dev->ethtool_ops->get_settings(dev, &cmd);
 122         if (err < 0)
 123                 return err;
 124
 125         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 126                 return -EFAULT;
 127         return 0;
 128 }
 129
 130 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 131 {
 132         struct ethtool_cmd cmd;
 133
 134         if (!dev->ethtool_ops->set_settings)
 135                 return -EOPNOTSUPP;
 136
 137         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 138                 return -EFAULT;
 139
 140         return dev->ethtool_ops->set_settings(dev, &cmd);
 141 }
 142
 143 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
 144 {
 145         struct ethtool_drvinfo info;
 146         const struct ethtool_ops *ops = dev->ethtool_ops;
 147
 148         if (!ops->get_drvinfo)
 149                 return -EOPNOTSUPP;
 150
 151         memset(&info, 0, sizeof(info));
 152         info.cmd = ETHTOOL_GDRVINFO;
 153         ops->get_drvinfo(dev, &info);
 154
 155         if (ops->self_test_count)
 156                 info.testinfo_len = ops->self_test_count(dev);
 157         if (ops->get_stats_count)
 158                 info.n_stats = ops->get_stats_count(dev);
 159         if (ops->get_regs_len)
 160                 info.regdump_len = ops->get_regs_len(dev);
 161         if (ops->get_eeprom_len)
 162                 info.eedump_len = ops->get_eeprom_len(dev);
 163
 164         if (copy_to_user(useraddr, &info, sizeof(info)))
 165                 return -EFAULT;
 166         return 0;
 167 }
 168
 169 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 170 {
 171         struct ethtool_regs regs;
 172         const struct ethtool_ops *ops = dev->ethtool_ops;
 173         void *regbuf;
 174         int reglen, ret;
 175
 176         if (!ops->get_regs || !ops->get_regs_len)
 177                 return -EOPNOTSUPP;
 178
 179         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 180                 return -EFAULT;
 181
 182         reglen = ops->get_regs_len(dev);
 183         if (regs.len > reglen)
 184                 regs.len = reglen;
 185
 186         regbuf = kmalloc(reglen, GFP_USER);
 187         if (!regbuf)
 188                 return -ENOMEM;
 189
 190         ops->get_regs(dev, &regs, regbuf);
 191
 192         ret = -EFAULT;
 193         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 194                 goto out;
 195         useraddr += offsetof(struct ethtool_regs, data);
 196         if (copy_to_user(useraddr, regbuf, regs.len))
 197                 goto out;
 198         ret = 0;
 199
 200  out:
 201         kfree(regbuf);
 202         return ret;
 203 }
 204
 205 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 206 {
 207         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 208
 209         if (!dev->ethtool_ops->get_wol)
 210                 return -EOPNOTSUPP;
 211
 212         dev->ethtool_ops->get_wol(dev, &wol);
 213
 214         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 215                 return -EFAULT;
 216         return 0;
 217 }
 218
 219 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 220 {
 221         struct ethtool_wolinfo wol;
 222
 223         if (!dev->ethtool_ops->set_wol)
 224                 return -EOPNOTSUPP;
 225
 226         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 227                 return -EFAULT;
 228
 229         return dev->ethtool_ops->set_wol(dev, &wol);
 230 }
 231
 232 static int ethtool_get_msglevel(struct net_device *dev, char __user *useraddr)
 233 {
 234         struct ethtool_value edata = { ETHTOOL_GMSGLVL };
 235
 236         if (!dev->ethtool_ops->get_msglevel)
 237                 return -EOPNOTSUPP;
 238
 239         edata.data = dev->ethtool_ops->get_msglevel(dev);
 240
 241         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 242                 return -EFAULT;
 243         return 0;
 244 }
 245
 246 static int ethtool_set_msglevel(struct net_device *dev, char __user *useraddr)
 247 {
 248         struct ethtool_value edata;
 249
 250         if (!dev->ethtool_ops->set_msglevel)
 251                 return -EOPNOTSUPP;
 252
 253         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 254                 return -EFAULT;
 255
 256         dev->ethtool_ops->set_msglevel(dev, edata.data);
 257         return 0;
 258 }
 259
 260 static int ethtool_nway_reset(struct net_device *dev)
 261 {
 262         if (!dev->ethtool_ops->nway_reset)
 263                 return -EOPNOTSUPP;
 264
 265         return dev->ethtool_ops->nway_reset(dev);
 266 }
 267
 268 static int ethtool_get_link(struct net_device *dev, void __user *useraddr)
 269 {
 270         struct ethtool_value edata = { ETHTOOL_GLINK };
 271
 272         if (!dev->ethtool_ops->get_link)
 273                 return -EOPNOTSUPP;
 274
 275         edata.data = dev->ethtool_ops->get_link(dev);
 276
 277         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 278                 return -EFAULT;
 279         return 0;
 280 }
 281
 282 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 283 {
 284         struct ethtool_eeprom eeprom;
 285         const struct ethtool_ops *ops = dev->ethtool_ops;
 286         u8 *data;
 287         int ret;
 288
 289         if (!ops->get_eeprom || !ops->get_eeprom_len)
 290                 return -EOPNOTSUPP;
 291
 292         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 293                 return -EFAULT;
 294
 295         /* Check for wrap and zero */
 296         if (eeprom.offset + eeprom.len <= eeprom.offset)
 297                 return -EINVAL;
 298
 299         /* Check for exceeding total eeprom len */
 300         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 301                 return -EINVAL;
 302
 303         data = kmalloc(eeprom.len, GFP_USER);
 304         if (!data)
 305                 return -ENOMEM;
 306
 307         ret = -EFAULT;
 308         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 309                 goto out;
 310
 311         ret = ops->get_eeprom(dev, &eeprom, data);
 312         if (ret)
 313                 goto out;
 314
 315         ret = -EFAULT;
 316         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 317                 goto out;
 318         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 319                 goto out;
 320         ret = 0;
 321
 322  out:
 323         kfree(data);
 324         return ret;
 325 }
 326
 327 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 328 {
 329         struct ethtool_eeprom eeprom;
 330         const struct ethtool_ops *ops = dev->ethtool_ops;
 331         u8 *data;
 332         int ret;
 333
 334         if (!ops->set_eeprom || !ops->get_eeprom_len)
 335                 return -EOPNOTSUPP;
 336
 337         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 338                 return -EFAULT;
 339
 340         /* Check for wrap and zero */
 341         if (eeprom.offset + eeprom.len <= eeprom.offset)
 342                 return -EINVAL;
 343
 344         /* Check for exceeding total eeprom len */
 345         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 346                 return -EINVAL;
 347
 348         data = kmalloc(eeprom.len, GFP_USER);
 349         if (!data)
 350                 return -ENOMEM;
 351
 352         ret = -EFAULT;
 353         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 354                 goto out;
 355
 356         ret = ops->set_eeprom(dev, &eeprom, data);
 357         if (ret)
 358                 goto out;
 359
 360         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 361                 ret = -EFAULT;
 362
 363  out:
 364         kfree(data);
 365         return ret;
 366 }
 367
 368 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 369 {
 370         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 371
 372         if (!dev->ethtool_ops->get_coalesce)
 373                 return -EOPNOTSUPP;
 374
 375         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 376
 377         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 378                 return -EFAULT;
 379         return 0;
 380 }
 381
 382 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 383 {
 384         struct ethtool_coalesce coalesce;
 385
 386         if (!dev->ethtool_ops->set_coalesce)
 387                 return -EOPNOTSUPP;
 388
 389         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 390                 return -EFAULT;
 391
 392         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 393 }
 394
 395 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 396 {
 397         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 398
 399         if (!dev->ethtool_ops->get_ringparam)
 400                 return -EOPNOTSUPP;
 401
 402         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 403
 404         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 405                 return -EFAULT;
 406         return 0;
 407 }
 408
 409 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 410 {
 411         struct ethtool_ringparam ringparam;
 412
 413         if (!dev->ethtool_ops->set_ringparam)
 414                 return -EOPNOTSUPP;
 415
 416         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 417                 return -EFAULT;
 418
 419         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 420 }
 421
 422 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 423 {
 424         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 425
 426         if (!dev->ethtool_ops->get_pauseparam)
 427                 return -EOPNOTSUPP;
 428
 429         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 430
 431         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 432                 return -EFAULT;
 433         return 0;
 434 }
 435
 436 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 437 {
 438         struct ethtool_pauseparam pauseparam;
 439
 440         if (!dev->ethtool_ops->set_pauseparam)
 441                 return -EOPNOTSUPP;
 442
 443         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 444                 return -EFAULT;
 445
 446         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 447 }
 448
 449 static int ethtool_get_rx_csum(struct net_device *dev, char __user *useraddr)
 450 {
 451         struct ethtool_value edata = { ETHTOOL_GRXCSUM };
 452
 453         if (!dev->ethtool_ops->get_rx_csum)
 454                 return -EOPNOTSUPP;
 455
 456         edata.data = dev->ethtool_ops->get_rx_csum(dev);
 457
 458         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 459                 return -EFAULT;
 460         return 0;
 461 }
 462
 463 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
 464 {
 465         struct ethtool_value edata;
 466
 467         if (!dev->ethtool_ops->set_rx_csum)
 468                 return -EOPNOTSUPP;
 469
 470         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 471                 return -EFAULT;
 472
 473         dev->ethtool_ops->set_rx_csum(dev, edata.data);
 474         return 0;
 475 }
 476
 477 static int ethtool_get_tx_csum(struct net_device *dev, char __user *useraddr)
 478 {
 479         struct ethtool_value edata = { ETHTOOL_GTXCSUM };
 480
 481         if (!dev->ethtool_ops->get_tx_csum)
 482                 return -EOPNOTSUPP;
 483
 484         edata.data = dev->ethtool_ops->get_tx_csum(dev);
 485
 486         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 487                 return -EFAULT;
 488         return 0;
 489 }
 490
 491 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 492 {
 493         int err;
 494
 495         if (!data && dev->ethtool_ops->set_tso) {
 496                 err = dev->ethtool_ops->set_tso(dev, 0);
 497                 if (err)
 498                         return err;
 499         }
 500
 501         if (!data && dev->ethtool_ops->set_ufo) {
 502                 err = dev->ethtool_ops->set_ufo(dev, 0);
 503                 if (err)
 504                         return err;
 505         }
 506         return dev->ethtool_ops->set_sg(dev, data);
 507 }
 508
 509 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 510 {
 511         struct ethtool_value edata;
 512         int err;
 513
 514         if (!dev->ethtool_ops->set_tx_csum)
 515                 return -EOPNOTSUPP;
 516
 517         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 518                 return -EFAULT;
 519
 520         if (!edata.data && dev->ethtool_ops->set_sg) {
 521                 err = __ethtool_set_sg(dev, 0);
 522                 if (err)
 523                         return err;
 524         }
 525
 526         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 527 }
 528
 529 static int ethtool_get_sg(struct net_device *dev, char __user *useraddr)
 530 {
 531         struct ethtool_value edata = { ETHTOOL_GSG };
 532
 533         if (!dev->ethtool_ops->get_sg)
 534                 return -EOPNOTSUPP;
 535
 536         edata.data = dev->ethtool_ops->get_sg(dev);
 537
 538         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 539                 return -EFAULT;
 540         return 0;
 541 }
 542
 543 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 544 {
 545         struct ethtool_value edata;
 546
 547         if (!dev->ethtool_ops->set_sg)
 548                 return -EOPNOTSUPP;
 549
 550         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 551                 return -EFAULT;
 552
 553         if (edata.data &&
 554             !(dev->features & NETIF_F_ALL_CSUM))
 555                 return -EINVAL;
 556
 557         return __ethtool_set_sg(dev, edata.data);
 558 }
 559
 560 static int ethtool_get_tso(struct net_device *dev, char __user *useraddr)
 561 {
 562         struct ethtool_value edata = { ETHTOOL_GTSO };
 563
 564         if (!dev->ethtool_ops->get_tso)
 565                 return -EOPNOTSUPP;
 566
 567         edata.data = dev->ethtool_ops->get_tso(dev);
 568
 569         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 570                 return -EFAULT;
 571         return 0;
 572 }
 573
 574 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 575 {
 576         struct ethtool_value edata;
 577
 578         if (!dev->ethtool_ops->set_tso)
 579                 return -EOPNOTSUPP;
 580
 581         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 582                 return -EFAULT;
 583
 584         if (edata.data && !(dev->features & NETIF_F_SG))
 585                 return -EINVAL;
 586
 587         return dev->ethtool_ops->set_tso(dev, edata.data);
 588 }
 589
 590 static int ethtool_get_ufo(struct net_device *dev, char __user *useraddr)
 591 {
 592         struct ethtool_value edata = { ETHTOOL_GUFO };
 593
 594         if (!dev->ethtool_ops->get_ufo)
 595                 return -EOPNOTSUPP;
 596         edata.data = dev->ethtool_ops->get_ufo(dev);
 597         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 598                  return -EFAULT;
 599         return 0;
 600 }
 601
 602 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 603 {
 604         struct ethtool_value edata;
 605
 606         if (!dev->ethtool_ops->set_ufo)
 607                 return -EOPNOTSUPP;
 608         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 609                 return -EFAULT;
 610         if (edata.data && !(dev->features & NETIF_F_SG))
 611                 return -EINVAL;
 612         if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 613                 return -EINVAL;
 614         return dev->ethtool_ops->set_ufo(dev, edata.data);
 615 }
 616
 617 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 618 {
 619         struct ethtool_value edata = { ETHTOOL_GGSO };
 620
 621         edata.data = dev->features & NETIF_F_GSO;
 622         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 623                  return -EFAULT;
 624         return 0;
 625 }
 626
 627 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 628 {
 629         struct ethtool_value edata;
 630
 631         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 632                 return -EFAULT;
 633         if (edata.data)
 634                 dev->features |= NETIF_F_GSO;
 635         else
 636                 dev->features &= ~NETIF_F_GSO;
 637         return 0;
 638 }
 639
 640 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 641 {
 642         struct ethtool_test test;
 643         const struct ethtool_ops *ops = dev->ethtool_ops;
 644         u64 *data;
 645         int ret;
 646
 647         if (!ops->self_test || !ops->self_test_count)
 648                 return -EOPNOTSUPP;
 649
 650         if (copy_from_user(&test, useraddr, sizeof(test)))
 651                 return -EFAULT;
 652
 653         test.len = ops->self_test_count(dev);
 654         data = kmalloc(test.len * sizeof(u64), GFP_USER);
 655         if (!data)
 656                 return -ENOMEM;
 657
 658         ops->self_test(dev, &test, data);
 659
 660         ret = -EFAULT;
 661         if (copy_to_user(useraddr, &test, sizeof(test)))
 662                 goto out;
 663         useraddr += sizeof(test);
 664         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 665                 goto out;
 666         ret = 0;
 667
 668  out:
 669         kfree(data);
 670         return ret;
 671 }
 672
 673 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 674 {
 675         struct ethtool_gstrings gstrings;
 676         const struct ethtool_ops *ops = dev->ethtool_ops;
 677         u8 *data;
 678         int ret;
 679
 680         if (!ops->get_strings)
 681                 return -EOPNOTSUPP;
 682
 683         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 684                 return -EFAULT;
 685
 686         switch (gstrings.string_set) {
 687         case ETH_SS_TEST:
 688                 if (!ops->self_test_count)
 689                         return -EOPNOTSUPP;
 690                 gstrings.len = ops->self_test_count(dev);
 691                 break;
 692         case ETH_SS_STATS:
 693                 if (!ops->get_stats_count)
 694                         return -EOPNOTSUPP;
 695                 gstrings.len = ops->get_stats_count(dev);
 696                 break;
 697         default:
 698                 return -EINVAL;
 699         }
 700
 701         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 702         if (!data)
 703                 return -ENOMEM;
 704
 705         ops->get_strings(dev, gstrings.string_set, data);
 706
 707         ret = -EFAULT;
 708         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 709                 goto out;
 710         useraddr += sizeof(gstrings);
 711         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 712                 goto out;
 713         ret = 0;
 714
 715  out:
 716         kfree(data);
 717         return ret;
 718 }
 719
 720 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 721 {
 722         struct ethtool_value id;
 723
 724         if (!dev->ethtool_ops->phys_id)
 725                 return -EOPNOTSUPP;
 726
 727         if (copy_from_user(&id, useraddr, sizeof(id)))
 728                 return -EFAULT;
 729
 730         return dev->ethtool_ops->phys_id(dev, id.data);
 731 }
 732
 733 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 734 {
 735         struct ethtool_stats stats;
 736         const struct ethtool_ops *ops = dev->ethtool_ops;
 737         u64 *data;
 738         int ret;
 739
 740         if (!ops->get_ethtool_stats || !ops->get_stats_count)
 741                 return -EOPNOTSUPP;
 742
 743         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 744                 return -EFAULT;
 745
 746         stats.n_stats = ops->get_stats_count(dev);
 747         data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
 748         if (!data)
 749                 return -ENOMEM;
 750
 751         ops->get_ethtool_stats(dev, &stats, data);
 752
 753         ret = -EFAULT;
 754         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 755                 goto out;
 756         useraddr += sizeof(stats);
 757         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 758                 goto out;
 759         ret = 0;
 760
 761  out:
 762         kfree(data);
 763         return ret;
 764 }
 765
 766 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 767 {
 768         struct ethtool_perm_addr epaddr;
 769         u8 *data;
 770         int ret;
 771
 772         if (!dev->ethtool_ops->get_perm_addr)
 773                 return -EOPNOTSUPP;
 774
 775         if (copy_from_user(&epaddr,useraddr,sizeof(epaddr)))
 776                 return -EFAULT;
 777
 778         data = kmalloc(epaddr.size, GFP_USER);
 779         if (!data)
 780                 return -ENOMEM;
 781
 782         ret = dev->ethtool_ops->get_perm_addr(dev,&epaddr,data);
 783         if (ret)
 784                 return ret;
 785
 786         ret = -EFAULT;
 787         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 788                 goto out;
 789         useraddr += sizeof(epaddr);
 790         if (copy_to_user(useraddr, data, epaddr.size))
 791                 goto out;
 792         ret = 0;
 793
 794  out:
 795         kfree(data);
 796         return ret;
 797 }
 798
 799 /* The main entry point in this file.  Called from net/core/dev.c */
 800
 801 int dev_ethtool(struct ifreq *ifr)
 802 {
 803         struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
 804         void __user *useraddr = ifr->ifr_data;
 805         u32 ethcmd;
 806         int rc;
 807         unsigned long old_features;
 808
 809         if (!dev || !netif_device_present(dev))
 810                 return -ENODEV;
 811
 812         if (!dev->ethtool_ops)
 813                 goto ioctl;
 814
 815         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 816                 return -EFAULT;
 817
 818         /* Allow some commands to be done by anyone */
 819         switch(ethcmd) {
 820         case ETHTOOL_GDRVINFO:
 821         case ETHTOOL_GMSGLVL:
 822         case ETHTOOL_GCOALESCE:
 823         case ETHTOOL_GRINGPARAM:
 824         case ETHTOOL_GPAUSEPARAM:
 825         case ETHTOOL_GRXCSUM:
 826         case ETHTOOL_GTXCSUM:
 827         case ETHTOOL_GSG:
 828         case ETHTOOL_GSTRINGS:
 829         case ETHTOOL_GTSO:
 830         case ETHTOOL_GPERMADDR:
 831         case ETHTOOL_GUFO:
 832         case ETHTOOL_GGSO:
 833                 break;
 834         default:
 835                 if (!capable(CAP_NET_ADMIN))
 836                         return -EPERM;
 837         }
 838
 839         if (dev->ethtool_ops->begin)
 840                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 841                         return rc;
 842
 843         old_features = dev->features;
 844
 845         switch (ethcmd) {
 846         case ETHTOOL_GSET:
 847                 rc = ethtool_get_settings(dev, useraddr);
 848                 break;
 849         case ETHTOOL_SSET:
 850                 rc = ethtool_set_settings(dev, useraddr);
 851                 break;
 852         case ETHTOOL_GDRVINFO:
 853                 rc = ethtool_get_drvinfo(dev, useraddr);
 854                 break;
 855         case ETHTOOL_GREGS:
 856                 rc = ethtool_get_regs(dev, useraddr);
 857                 break;
 858         case ETHTOOL_GWOL:
 859                 rc = ethtool_get_wol(dev, useraddr);
 860                 break;
 861         case ETHTOOL_SWOL:
 862                 rc = ethtool_set_wol(dev, useraddr);
 863                 break;
 864         case ETHTOOL_GMSGLVL:
 865                 rc = ethtool_get_msglevel(dev, useraddr);
 866                 break;
 867         case ETHTOOL_SMSGLVL:
 868                 rc = ethtool_set_msglevel(dev, useraddr);
 869                 break;
 870         case ETHTOOL_NWAY_RST:
 871                 rc = ethtool_nway_reset(dev);
 872                 break;
 873         case ETHTOOL_GLINK:
 874                 rc = ethtool_get_link(dev, useraddr);
 875                 break;
 876         case ETHTOOL_GEEPROM:
 877                 rc = ethtool_get_eeprom(dev, useraddr);
 878                 break;
 879         case ETHTOOL_SEEPROM:
 880                 rc = ethtool_set_eeprom(dev, useraddr);
 881                 break;
 882         case ETHTOOL_GCOALESCE:
 883                 rc = ethtool_get_coalesce(dev, useraddr);
 884                 break;
 885         case ETHTOOL_SCOALESCE:
 886                 rc = ethtool_set_coalesce(dev, useraddr);
 887                 break;
 888         case ETHTOOL_GRINGPARAM:
 889                 rc = ethtool_get_ringparam(dev, useraddr);
 890                 break;
 891         case ETHTOOL_SRINGPARAM:
 892                 rc = ethtool_set_ringparam(dev, useraddr);
 893                 break;
 894         case ETHTOOL_GPAUSEPARAM:
 895                 rc = ethtool_get_pauseparam(dev, useraddr);
 896                 break;
 897         case ETHTOOL_SPAUSEPARAM:
 898                 rc = ethtool_set_pauseparam(dev, useraddr);
 899                 break;
 900         case ETHTOOL_GRXCSUM:
 901                 rc = ethtool_get_rx_csum(dev, useraddr);
 902                 break;
 903         case ETHTOOL_SRXCSUM:
 904                 rc = ethtool_set_rx_csum(dev, useraddr);
 905                 break;
 906         case ETHTOOL_GTXCSUM:
 907                 rc = ethtool_get_tx_csum(dev, useraddr);
 908                 break;
 909         case ETHTOOL_STXCSUM:
 910                 rc = ethtool_set_tx_csum(dev, useraddr);
 911                 break;
 912         case ETHTOOL_GSG:
 913                 rc = ethtool_get_sg(dev, useraddr);
 914                 break;
 915         case ETHTOOL_SSG:
 916                 rc = ethtool_set_sg(dev, useraddr);
 917                 break;
 918         case ETHTOOL_GTSO:
 919                 rc = ethtool_get_tso(dev, useraddr);
 920                 break;
 921         case ETHTOOL_STSO:
 922                 rc = ethtool_set_tso(dev, useraddr);
 923                 break;
 924         case ETHTOOL_TEST:
 925                 rc = ethtool_self_test(dev, useraddr);
 926                 break;
 927         case ETHTOOL_GSTRINGS:
 928                 rc = ethtool_get_strings(dev, useraddr);
 929                 break;
 930         case ETHTOOL_PHYS_ID:
 931                 rc = ethtool_phys_id(dev, useraddr);
 932                 break;
 933         case ETHTOOL_GSTATS:
 934                 rc = ethtool_get_stats(dev, useraddr);
 935                 break;
 936         case ETHTOOL_GPERMADDR:
 937                 rc = ethtool_get_perm_addr(dev, useraddr);
 938                 break;
 939         case ETHTOOL_GUFO:
 940                 rc = ethtool_get_ufo(dev, useraddr);
 941                 break;
 942         case ETHTOOL_SUFO:
 943                 rc = ethtool_set_ufo(dev, useraddr);
 944                 break;
 945         case ETHTOOL_GGSO:
 946                 rc = ethtool_get_gso(dev, useraddr);
 947                 break;
 948         case ETHTOOL_SGSO:
 949                 rc = ethtool_set_gso(dev, useraddr);
 950                 break;
 951         default:
 952                 rc =  -EOPNOTSUPP;
 953         }
 954
 955         if (dev->ethtool_ops->complete)
 956                 dev->ethtool_ops->complete(dev);
 957
 958         if (old_features != dev->features)
 959                 netdev_features_change(dev);
 960
 961         return rc;
 962
 963  ioctl:
 964         /* Keep existing behaviour for the moment.       */
 965         if (!capable(CAP_NET_ADMIN))
 966                 return -EPERM;
 967
 968         if (dev->do_ioctl)
 969                 return dev->do_ioctl(dev, ifr, SIOCETHTOOL);
 970         return -EOPNOTSUPP;
 971 }
 972
 973 EXPORT_SYMBOL(dev_ethtool);
 974 EXPORT_SYMBOL(ethtool_op_get_link);
 975 EXPORT_SYMBOL_GPL(ethtool_op_get_perm_addr);
 976 EXPORT_SYMBOL(ethtool_op_get_sg);
 977 EXPORT_SYMBOL(ethtool_op_get_tso);
 978 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
 979 EXPORT_SYMBOL(ethtool_op_set_sg);
 980 EXPORT_SYMBOL(ethtool_op_set_tso);
 981 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
 982 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
 983 EXPORT_SYMBOL(ethtool_op_set_ufo);
 984 EXPORT_SYMBOL(ethtool_op_get_ufo);