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