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.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/capability.h>
  17 #include <linux/errno.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/netdevice.h>
  20 #include <asm/uaccess.h>
  21
  22 /*
  23  * Some useful ethtool_ops methods that're device independent.
  24  * If we find that all drivers want to do the same thing here,
  25  * we can turn these into dev_() function calls.
  26  */
  27
  28 u32 ethtool_op_get_link(struct net_device *dev)
  29 {
  30         return netif_carrier_ok(dev) ? 1 : 0;
  31 }
  32
  33 u32 ethtool_op_get_tx_csum(struct net_device *dev)
  34 {
  35         return (dev->features & NETIF_F_ALL_CSUM) != 0;
  36 }
  37
  38 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
  39 {
  40         if (data)
  41                 dev->features |= NETIF_F_IP_CSUM;
  42         else
  43                 dev->features &= ~NETIF_F_IP_CSUM;
  44
  45         return 0;
  46 }
  47
  48 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
  49 {
  50         if (data)
  51                 dev->features |= NETIF_F_HW_CSUM;
  52         else
  53                 dev->features &= ~NETIF_F_HW_CSUM;
  54
  55         return 0;
  56 }
  57
  58 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
  59 {
  60         if (data)
  61                 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
  62         else
  63                 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
  64
  65         return 0;
  66 }
  67
  68 u32 ethtool_op_get_sg(struct net_device *dev)
  69 {
  70         return (dev->features & NETIF_F_SG) != 0;
  71 }
  72
  73 int ethtool_op_set_sg(struct net_device *dev, u32 data)
  74 {
  75         if (data)
  76                 dev->features |= NETIF_F_SG;
  77         else
  78                 dev->features &= ~NETIF_F_SG;
  79
  80         return 0;
  81 }
  82
  83 u32 ethtool_op_get_tso(struct net_device *dev)
  84 {
  85         return (dev->features & NETIF_F_TSO) != 0;
  86 }
  87
  88 int ethtool_op_set_tso(struct net_device *dev, u32 data)
  89 {
  90         if (data)
  91                 dev->features |= NETIF_F_TSO;
  92         else
  93                 dev->features &= ~NETIF_F_TSO;
  94
  95         return 0;
  96 }
  97
  98 u32 ethtool_op_get_ufo(struct net_device *dev)
  99 {
 100         return (dev->features & NETIF_F_UFO) != 0;
 101 }
 102
 103 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
 104 {
 105         if (data)
 106                 dev->features |= NETIF_F_UFO;
 107         else
 108                 dev->features &= ~NETIF_F_UFO;
 109         return 0;
 110 }
 111
 112 /* the following list of flags are the same as their associated
 113  * NETIF_F_xxx values in include/linux/netdevice.h
 114  */
 115 static const u32 flags_dup_features =
 116         ETH_FLAG_LRO;
 117
 118 u32 ethtool_op_get_flags(struct net_device *dev)
 119 {
 120         /* in the future, this function will probably contain additional
 121          * handling for flags which are not so easily handled
 122          * by a simple masking operation
 123          */
 124
 125         return dev->features & flags_dup_features;
 126 }
 127
 128 int ethtool_op_set_flags(struct net_device *dev, u32 data)
 129 {
 130         if (data & ETH_FLAG_LRO)
 131                 dev->features |= NETIF_F_LRO;
 132         else
 133                 dev->features &= ~NETIF_F_LRO;
 134
 135         return 0;
 136 }
 137
 138 /* Handlers for each ethtool command */
 139
 140 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 141 {
 142         struct ethtool_cmd cmd = { ETHTOOL_GSET };
 143         int err;
 144
 145         if (!dev->ethtool_ops->get_settings)
 146                 return -EOPNOTSUPP;
 147
 148         err = dev->ethtool_ops->get_settings(dev, &cmd);
 149         if (err < 0)
 150                 return err;
 151
 152         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 153                 return -EFAULT;
 154         return 0;
 155 }
 156
 157 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 158 {
 159         struct ethtool_cmd cmd;
 160
 161         if (!dev->ethtool_ops->set_settings)
 162                 return -EOPNOTSUPP;
 163
 164         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 165                 return -EFAULT;
 166
 167         return dev->ethtool_ops->set_settings(dev, &cmd);
 168 }
 169
 170 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
 171 {
 172         struct ethtool_drvinfo info;
 173         const struct ethtool_ops *ops = dev->ethtool_ops;
 174
 175         if (!ops->get_drvinfo)
 176                 return -EOPNOTSUPP;
 177
 178         memset(&info, 0, sizeof(info));
 179         info.cmd = ETHTOOL_GDRVINFO;
 180         ops->get_drvinfo(dev, &info);
 181
 182         if (ops->get_sset_count) {
 183                 int rc;
 184
 185                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 186                 if (rc >= 0)
 187                         info.testinfo_len = rc;
 188                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 189                 if (rc >= 0)
 190                         info.n_stats = rc;
 191                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 192                 if (rc >= 0)
 193                         info.n_priv_flags = rc;
 194         } else {
 195                 /* code path for obsolete hooks */
 196
 197                 if (ops->self_test_count)
 198                         info.testinfo_len = ops->self_test_count(dev);
 199                 if (ops->get_stats_count)
 200                         info.n_stats = ops->get_stats_count(dev);
 201         }
 202         if (ops->get_regs_len)
 203                 info.regdump_len = ops->get_regs_len(dev);
 204         if (ops->get_eeprom_len)
 205                 info.eedump_len = ops->get_eeprom_len(dev);
 206
 207         if (copy_to_user(useraddr, &info, sizeof(info)))
 208                 return -EFAULT;
 209         return 0;
 210 }
 211
 212 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 213 {
 214         struct ethtool_regs regs;
 215         const struct ethtool_ops *ops = dev->ethtool_ops;
 216         void *regbuf;
 217         int reglen, ret;
 218
 219         if (!ops->get_regs || !ops->get_regs_len)
 220                 return -EOPNOTSUPP;
 221
 222         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 223                 return -EFAULT;
 224
 225         reglen = ops->get_regs_len(dev);
 226         if (regs.len > reglen)
 227                 regs.len = reglen;
 228
 229         regbuf = kmalloc(reglen, GFP_USER);
 230         if (!regbuf)
 231                 return -ENOMEM;
 232
 233         ops->get_regs(dev, &regs, regbuf);
 234
 235         ret = -EFAULT;
 236         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 237                 goto out;
 238         useraddr += offsetof(struct ethtool_regs, data);
 239         if (copy_to_user(useraddr, regbuf, regs.len))
 240                 goto out;
 241         ret = 0;
 242
 243  out:
 244         kfree(regbuf);
 245         return ret;
 246 }
 247
 248 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 249 {
 250         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 251
 252         if (!dev->ethtool_ops->get_wol)
 253                 return -EOPNOTSUPP;
 254
 255         dev->ethtool_ops->get_wol(dev, &wol);
 256
 257         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 258                 return -EFAULT;
 259         return 0;
 260 }
 261
 262 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 263 {
 264         struct ethtool_wolinfo wol;
 265
 266         if (!dev->ethtool_ops->set_wol)
 267                 return -EOPNOTSUPP;
 268
 269         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 270                 return -EFAULT;
 271
 272         return dev->ethtool_ops->set_wol(dev, &wol);
 273 }
 274
 275 static int ethtool_nway_reset(struct net_device *dev)
 276 {
 277         if (!dev->ethtool_ops->nway_reset)
 278                 return -EOPNOTSUPP;
 279
 280         return dev->ethtool_ops->nway_reset(dev);
 281 }
 282
 283 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 284 {
 285         struct ethtool_eeprom eeprom;
 286         const struct ethtool_ops *ops = dev->ethtool_ops;
 287         u8 *data;
 288         int ret;
 289
 290         if (!ops->get_eeprom || !ops->get_eeprom_len)
 291                 return -EOPNOTSUPP;
 292
 293         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 294                 return -EFAULT;
 295
 296         /* Check for wrap and zero */
 297         if (eeprom.offset + eeprom.len <= eeprom.offset)
 298                 return -EINVAL;
 299
 300         /* Check for exceeding total eeprom len */
 301         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 302                 return -EINVAL;
 303
 304         data = kmalloc(eeprom.len, GFP_USER);
 305         if (!data)
 306                 return -ENOMEM;
 307
 308         ret = -EFAULT;
 309         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 310                 goto out;
 311
 312         ret = ops->get_eeprom(dev, &eeprom, data);
 313         if (ret)
 314                 goto out;
 315
 316         ret = -EFAULT;
 317         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 318                 goto out;
 319         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 320                 goto out;
 321         ret = 0;
 322
 323  out:
 324         kfree(data);
 325         return ret;
 326 }
 327
 328 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 329 {
 330         struct ethtool_eeprom eeprom;
 331         const struct ethtool_ops *ops = dev->ethtool_ops;
 332         u8 *data;
 333         int ret;
 334
 335         if (!ops->set_eeprom || !ops->get_eeprom_len)
 336                 return -EOPNOTSUPP;
 337
 338         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 339                 return -EFAULT;
 340
 341         /* Check for wrap and zero */
 342         if (eeprom.offset + eeprom.len <= eeprom.offset)
 343                 return -EINVAL;
 344
 345         /* Check for exceeding total eeprom len */
 346         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 347                 return -EINVAL;
 348
 349         data = kmalloc(eeprom.len, GFP_USER);
 350         if (!data)
 351                 return -ENOMEM;
 352
 353         ret = -EFAULT;
 354         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 355                 goto out;
 356
 357         ret = ops->set_eeprom(dev, &eeprom, data);
 358         if (ret)
 359                 goto out;
 360
 361         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 362                 ret = -EFAULT;
 363
 364  out:
 365         kfree(data);
 366         return ret;
 367 }
 368
 369 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 370 {
 371         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 372
 373         if (!dev->ethtool_ops->get_coalesce)
 374                 return -EOPNOTSUPP;
 375
 376         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 377
 378         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 379                 return -EFAULT;
 380         return 0;
 381 }
 382
 383 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 384 {
 385         struct ethtool_coalesce coalesce;
 386
 387         if (!dev->ethtool_ops->set_coalesce)
 388                 return -EOPNOTSUPP;
 389
 390         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 391                 return -EFAULT;
 392
 393         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 394 }
 395
 396 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 397 {
 398         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 399
 400         if (!dev->ethtool_ops->get_ringparam)
 401                 return -EOPNOTSUPP;
 402
 403         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 404
 405         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 406                 return -EFAULT;
 407         return 0;
 408 }
 409
 410 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 411 {
 412         struct ethtool_ringparam ringparam;
 413
 414         if (!dev->ethtool_ops->set_ringparam)
 415                 return -EOPNOTSUPP;
 416
 417         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 418                 return -EFAULT;
 419
 420         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 421 }
 422
 423 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 424 {
 425         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 426
 427         if (!dev->ethtool_ops->get_pauseparam)
 428                 return -EOPNOTSUPP;
 429
 430         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 431
 432         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 433                 return -EFAULT;
 434         return 0;
 435 }
 436
 437 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 438 {
 439         struct ethtool_pauseparam pauseparam;
 440
 441         if (!dev->ethtool_ops->set_pauseparam)
 442                 return -EOPNOTSUPP;
 443
 444         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 445                 return -EFAULT;
 446
 447         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 448 }
 449
 450 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 451 {
 452         int err;
 453
 454         if (!data && dev->ethtool_ops->set_tso) {
 455                 err = dev->ethtool_ops->set_tso(dev, 0);
 456                 if (err)
 457                         return err;
 458         }
 459
 460         if (!data && dev->ethtool_ops->set_ufo) {
 461                 err = dev->ethtool_ops->set_ufo(dev, 0);
 462                 if (err)
 463                         return err;
 464         }
 465         return dev->ethtool_ops->set_sg(dev, data);
 466 }
 467
 468 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 469 {
 470         struct ethtool_value edata;
 471         int err;
 472
 473         if (!dev->ethtool_ops->set_tx_csum)
 474                 return -EOPNOTSUPP;
 475
 476         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 477                 return -EFAULT;
 478
 479         if (!edata.data && dev->ethtool_ops->set_sg) {
 480                 err = __ethtool_set_sg(dev, 0);
 481                 if (err)
 482                         return err;
 483         }
 484
 485         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 486 }
 487
 488 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 489 {
 490         struct ethtool_value edata;
 491
 492         if (!dev->ethtool_ops->set_sg)
 493                 return -EOPNOTSUPP;
 494
 495         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 496                 return -EFAULT;
 497
 498         if (edata.data &&
 499             !(dev->features & NETIF_F_ALL_CSUM))
 500                 return -EINVAL;
 501
 502         return __ethtool_set_sg(dev, edata.data);
 503 }
 504
 505 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 506 {
 507         struct ethtool_value edata;
 508
 509         if (!dev->ethtool_ops->set_tso)
 510                 return -EOPNOTSUPP;
 511
 512         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 513                 return -EFAULT;
 514
 515         if (edata.data && !(dev->features & NETIF_F_SG))
 516                 return -EINVAL;
 517
 518         return dev->ethtool_ops->set_tso(dev, edata.data);
 519 }
 520
 521 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 522 {
 523         struct ethtool_value edata;
 524
 525         if (!dev->ethtool_ops->set_ufo)
 526                 return -EOPNOTSUPP;
 527         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 528                 return -EFAULT;
 529         if (edata.data && !(dev->features & NETIF_F_SG))
 530                 return -EINVAL;
 531         if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 532                 return -EINVAL;
 533         return dev->ethtool_ops->set_ufo(dev, edata.data);
 534 }
 535
 536 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 537 {
 538         struct ethtool_value edata = { ETHTOOL_GGSO };
 539
 540         edata.data = dev->features & NETIF_F_GSO;
 541         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 542                  return -EFAULT;
 543         return 0;
 544 }
 545
 546 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 547 {
 548         struct ethtool_value edata;
 549
 550         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 551                 return -EFAULT;
 552         if (edata.data)
 553                 dev->features |= NETIF_F_GSO;
 554         else
 555                 dev->features &= ~NETIF_F_GSO;
 556         return 0;
 557 }
 558
 559 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 560 {
 561         struct ethtool_test test;
 562         const struct ethtool_ops *ops = dev->ethtool_ops;
 563         u64 *data;
 564         int ret, test_len;
 565
 566         if (!ops->self_test)
 567                 return -EOPNOTSUPP;
 568         if (!ops->get_sset_count && !ops->self_test_count)
 569                 return -EOPNOTSUPP;
 570
 571         if (ops->get_sset_count)
 572                 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
 573         else
 574                 /* code path for obsolete hook */
 575                 test_len = ops->self_test_count(dev);
 576         if (test_len < 0)
 577                 return test_len;
 578         WARN_ON(test_len == 0);
 579
 580         if (copy_from_user(&test, useraddr, sizeof(test)))
 581                 return -EFAULT;
 582
 583         test.len = test_len;
 584         data = kmalloc(test_len * sizeof(u64), GFP_USER);
 585         if (!data)
 586                 return -ENOMEM;
 587
 588         ops->self_test(dev, &test, data);
 589
 590         ret = -EFAULT;
 591         if (copy_to_user(useraddr, &test, sizeof(test)))
 592                 goto out;
 593         useraddr += sizeof(test);
 594         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 595                 goto out;
 596         ret = 0;
 597
 598  out:
 599         kfree(data);
 600         return ret;
 601 }
 602
 603 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 604 {
 605         struct ethtool_gstrings gstrings;
 606         const struct ethtool_ops *ops = dev->ethtool_ops;
 607         u8 *data;
 608         int ret;
 609
 610         if (!ops->get_strings)
 611                 return -EOPNOTSUPP;
 612
 613         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 614                 return -EFAULT;
 615
 616         if (ops->get_sset_count) {
 617                 ret = ops->get_sset_count(dev, gstrings.string_set);
 618                 if (ret < 0)
 619                         return ret;
 620
 621                 gstrings.len = ret;
 622         } else {
 623                 /* code path for obsolete hooks */
 624
 625                 switch (gstrings.string_set) {
 626                 case ETH_SS_TEST:
 627                         if (!ops->self_test_count)
 628                                 return -EOPNOTSUPP;
 629                         gstrings.len = ops->self_test_count(dev);
 630                         break;
 631                 case ETH_SS_STATS:
 632                         if (!ops->get_stats_count)
 633                                 return -EOPNOTSUPP;
 634                         gstrings.len = ops->get_stats_count(dev);
 635                         break;
 636                 default:
 637                         return -EINVAL;
 638                 }
 639         }
 640
 641         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 642         if (!data)
 643                 return -ENOMEM;
 644
 645         ops->get_strings(dev, gstrings.string_set, data);
 646
 647         ret = -EFAULT;
 648         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 649                 goto out;
 650         useraddr += sizeof(gstrings);
 651         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 652                 goto out;
 653         ret = 0;
 654
 655  out:
 656         kfree(data);
 657         return ret;
 658 }
 659
 660 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 661 {
 662         struct ethtool_value id;
 663
 664         if (!dev->ethtool_ops->phys_id)
 665                 return -EOPNOTSUPP;
 666
 667         if (copy_from_user(&id, useraddr, sizeof(id)))
 668                 return -EFAULT;
 669
 670         return dev->ethtool_ops->phys_id(dev, id.data);
 671 }
 672
 673 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 674 {
 675         struct ethtool_stats stats;
 676         const struct ethtool_ops *ops = dev->ethtool_ops;
 677         u64 *data;
 678         int ret, n_stats;
 679
 680         if (!ops->get_ethtool_stats)
 681                 return -EOPNOTSUPP;
 682         if (!ops->get_sset_count && !ops->get_stats_count)
 683                 return -EOPNOTSUPP;
 684
 685         if (ops->get_sset_count)
 686                 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
 687         else
 688                 /* code path for obsolete hook */
 689                 n_stats = ops->get_stats_count(dev);
 690         if (n_stats < 0)
 691                 return n_stats;
 692         WARN_ON(n_stats == 0);
 693
 694         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 695                 return -EFAULT;
 696
 697         stats.n_stats = n_stats;
 698         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
 699         if (!data)
 700                 return -ENOMEM;
 701
 702         ops->get_ethtool_stats(dev, &stats, data);
 703
 704         ret = -EFAULT;
 705         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 706                 goto out;
 707         useraddr += sizeof(stats);
 708         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 709                 goto out;
 710         ret = 0;
 711
 712  out:
 713         kfree(data);
 714         return ret;
 715 }
 716
 717 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 718 {
 719         struct ethtool_perm_addr epaddr;
 720
 721         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
 722                 return -EFAULT;
 723
 724         if (epaddr.size < dev->addr_len)
 725                 return -ETOOSMALL;
 726         epaddr.size = dev->addr_len;
 727
 728         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 729                 return -EFAULT;
 730         useraddr += sizeof(epaddr);
 731         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
 732                 return -EFAULT;
 733         return 0;
 734 }
 735
 736 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
 737                              u32 cmd, u32 (*actor)(struct net_device *))
 738 {
 739         struct ethtool_value edata = { cmd };
 740
 741         if (!actor)
 742                 return -EOPNOTSUPP;
 743
 744         edata.data = actor(dev);
 745
 746         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 747                 return -EFAULT;
 748         return 0;
 749 }
 750
 751 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
 752                              void (*actor)(struct net_device *, u32))
 753 {
 754         struct ethtool_value edata;
 755
 756         if (!actor)
 757                 return -EOPNOTSUPP;
 758
 759         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 760                 return -EFAULT;
 761
 762         actor(dev, edata.data);
 763         return 0;
 764 }
 765
 766 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
 767                              int (*actor)(struct net_device *, u32))
 768 {
 769         struct ethtool_value edata;
 770
 771         if (!actor)
 772                 return -EOPNOTSUPP;
 773
 774         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 775                 return -EFAULT;
 776
 777         return actor(dev, edata.data);
 778 }
 779
 780 /* The main entry point in this file.  Called from net/core/dev.c */
 781
 782 int dev_ethtool(struct net *net, struct ifreq *ifr)
 783 {
 784         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
 785         void __user *useraddr = ifr->ifr_data;
 786         u32 ethcmd;
 787         int rc;
 788         unsigned long old_features;
 789
 790         if (!dev || !netif_device_present(dev))
 791                 return -ENODEV;
 792
 793         if (!dev->ethtool_ops)
 794                 return -EOPNOTSUPP;
 795
 796         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 797                 return -EFAULT;
 798
 799         /* Allow some commands to be done by anyone */
 800         switch(ethcmd) {
 801         case ETHTOOL_GDRVINFO:
 802         case ETHTOOL_GMSGLVL:
 803         case ETHTOOL_GCOALESCE:
 804         case ETHTOOL_GRINGPARAM:
 805         case ETHTOOL_GPAUSEPARAM:
 806         case ETHTOOL_GRXCSUM:
 807         case ETHTOOL_GTXCSUM:
 808         case ETHTOOL_GSG:
 809         case ETHTOOL_GSTRINGS:
 810         case ETHTOOL_GTSO:
 811         case ETHTOOL_GPERMADDR:
 812         case ETHTOOL_GUFO:
 813         case ETHTOOL_GGSO:
 814         case ETHTOOL_GFLAGS:
 815         case ETHTOOL_GPFLAGS:
 816                 break;
 817         default:
 818                 if (!capable(CAP_NET_ADMIN))
 819                         return -EPERM;
 820         }
 821
 822         if (dev->ethtool_ops->begin)
 823                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 824                         return rc;
 825
 826         old_features = dev->features;
 827
 828         switch (ethcmd) {
 829         case ETHTOOL_GSET:
 830                 rc = ethtool_get_settings(dev, useraddr);
 831                 break;
 832         case ETHTOOL_SSET:
 833                 rc = ethtool_set_settings(dev, useraddr);
 834                 break;
 835         case ETHTOOL_GDRVINFO:
 836                 rc = ethtool_get_drvinfo(dev, useraddr);
 837                 break;
 838         case ETHTOOL_GREGS:
 839                 rc = ethtool_get_regs(dev, useraddr);
 840                 break;
 841         case ETHTOOL_GWOL:
 842                 rc = ethtool_get_wol(dev, useraddr);
 843                 break;
 844         case ETHTOOL_SWOL:
 845                 rc = ethtool_set_wol(dev, useraddr);
 846                 break;
 847         case ETHTOOL_GMSGLVL:
 848                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 849                                        dev->ethtool_ops->get_msglevel);
 850                 break;
 851         case ETHTOOL_SMSGLVL:
 852                 rc = ethtool_set_value_void(dev, useraddr,
 853                                        dev->ethtool_ops->set_msglevel);
 854                 break;
 855         case ETHTOOL_NWAY_RST:
 856                 rc = ethtool_nway_reset(dev);
 857                 break;
 858         case ETHTOOL_GLINK:
 859                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 860                                        dev->ethtool_ops->get_link);
 861                 break;
 862         case ETHTOOL_GEEPROM:
 863                 rc = ethtool_get_eeprom(dev, useraddr);
 864                 break;
 865         case ETHTOOL_SEEPROM:
 866                 rc = ethtool_set_eeprom(dev, useraddr);
 867                 break;
 868         case ETHTOOL_GCOALESCE:
 869                 rc = ethtool_get_coalesce(dev, useraddr);
 870                 break;
 871         case ETHTOOL_SCOALESCE:
 872                 rc = ethtool_set_coalesce(dev, useraddr);
 873                 break;
 874         case ETHTOOL_GRINGPARAM:
 875                 rc = ethtool_get_ringparam(dev, useraddr);
 876                 break;
 877         case ETHTOOL_SRINGPARAM:
 878                 rc = ethtool_set_ringparam(dev, useraddr);
 879                 break;
 880         case ETHTOOL_GPAUSEPARAM:
 881                 rc = ethtool_get_pauseparam(dev, useraddr);
 882                 break;
 883         case ETHTOOL_SPAUSEPARAM:
 884                 rc = ethtool_set_pauseparam(dev, useraddr);
 885                 break;
 886         case ETHTOOL_GRXCSUM:
 887                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 888                                        dev->ethtool_ops->get_rx_csum);
 889                 break;
 890         case ETHTOOL_SRXCSUM:
 891                 rc = ethtool_set_value(dev, useraddr,
 892                                        dev->ethtool_ops->set_rx_csum);
 893                 break;
 894         case ETHTOOL_GTXCSUM:
 895                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 896                                        dev->ethtool_ops->get_tx_csum);
 897                 break;
 898         case ETHTOOL_STXCSUM:
 899                 rc = ethtool_set_tx_csum(dev, useraddr);
 900                 break;
 901         case ETHTOOL_GSG:
 902                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 903                                        dev->ethtool_ops->get_sg);
 904                 break;
 905         case ETHTOOL_SSG:
 906                 rc = ethtool_set_sg(dev, useraddr);
 907                 break;
 908         case ETHTOOL_GTSO:
 909                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 910                                        dev->ethtool_ops->get_tso);
 911                 break;
 912         case ETHTOOL_STSO:
 913                 rc = ethtool_set_tso(dev, useraddr);
 914                 break;
 915         case ETHTOOL_TEST:
 916                 rc = ethtool_self_test(dev, useraddr);
 917                 break;
 918         case ETHTOOL_GSTRINGS:
 919                 rc = ethtool_get_strings(dev, useraddr);
 920                 break;
 921         case ETHTOOL_PHYS_ID:
 922                 rc = ethtool_phys_id(dev, useraddr);
 923                 break;
 924         case ETHTOOL_GSTATS:
 925                 rc = ethtool_get_stats(dev, useraddr);
 926                 break;
 927         case ETHTOOL_GPERMADDR:
 928                 rc = ethtool_get_perm_addr(dev, useraddr);
 929                 break;
 930         case ETHTOOL_GUFO:
 931                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 932                                        dev->ethtool_ops->get_ufo);
 933                 break;
 934         case ETHTOOL_SUFO:
 935                 rc = ethtool_set_ufo(dev, useraddr);
 936                 break;
 937         case ETHTOOL_GGSO:
 938                 rc = ethtool_get_gso(dev, useraddr);
 939                 break;
 940         case ETHTOOL_SGSO:
 941                 rc = ethtool_set_gso(dev, useraddr);
 942                 break;
 943         case ETHTOOL_GFLAGS:
 944                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 945                                        dev->ethtool_ops->get_flags);
 946                 break;
 947         case ETHTOOL_SFLAGS:
 948                 rc = ethtool_set_value(dev, useraddr,
 949                                        dev->ethtool_ops->set_flags);
 950                 break;
 951         case ETHTOOL_GPFLAGS:
 952                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 953                                        dev->ethtool_ops->get_priv_flags);
 954                 break;
 955         case ETHTOOL_SPFLAGS:
 956                 rc = ethtool_set_value(dev, useraddr,
 957                                        dev->ethtool_ops->set_priv_flags);
 958                 break;
 959         default:
 960                 rc = -EOPNOTSUPP;
 961         }
 962
 963         if (dev->ethtool_ops->complete)
 964                 dev->ethtool_ops->complete(dev);
 965
 966         if (old_features != dev->features)
 967                 netdev_features_change(dev);
 968
 969         return rc;
 970 }
 971
 972 EXPORT_SYMBOL(ethtool_op_get_link);
 973 EXPORT_SYMBOL(ethtool_op_get_sg);
 974 EXPORT_SYMBOL(ethtool_op_get_tso);
 975 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
 976 EXPORT_SYMBOL(ethtool_op_set_sg);
 977 EXPORT_SYMBOL(ethtool_op_set_tso);
 978 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
 979 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
 980 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
 981 EXPORT_SYMBOL(ethtool_op_set_ufo);
 982 EXPORT_SYMBOL(ethtool_op_get_ufo);
 983 EXPORT_SYMBOL(ethtool_op_set_flags);
 984 EXPORT_SYMBOL(ethtool_op_get_flags);