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_set_rxnfc(struct net_device *dev, void __user *useraddr)
 213 {
 214         struct ethtool_rxnfc cmd;
 215
 216         if (!dev->ethtool_ops->set_rxnfc)
 217                 return -EOPNOTSUPP;
 218
 219         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 220                 return -EFAULT;
 221
 222         return dev->ethtool_ops->set_rxnfc(dev, &cmd);
 223 }
 224
 225 static int ethtool_get_rxnfc(struct net_device *dev, void __user *useraddr)
 226 {
 227         struct ethtool_rxnfc info;
 228         const struct ethtool_ops *ops = dev->ethtool_ops;
 229         int ret;
 230         void *rule_buf = NULL;
 231
 232         if (!ops->get_rxnfc)
 233                 return -EOPNOTSUPP;
 234
 235         if (copy_from_user(&info, useraddr, sizeof(info)))
 236                 return -EFAULT;
 237
 238         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 239                 if (info.rule_cnt > 0) {
 240                         rule_buf = kmalloc(info.rule_cnt * sizeof(u32),
 241                                            GFP_USER);
 242                         if (!rule_buf)
 243                                 return -ENOMEM;
 244                 }
 245         }
 246
 247         ret = ops->get_rxnfc(dev, &info, rule_buf);
 248         if (ret < 0)
 249                 goto err_out;
 250
 251         ret = -EFAULT;
 252         if (copy_to_user(useraddr, &info, sizeof(info)))
 253                 goto err_out;
 254
 255         if (rule_buf) {
 256                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 257                 if (copy_to_user(useraddr, rule_buf,
 258                                  info.rule_cnt * sizeof(u32)))
 259                         goto err_out;
 260         }
 261         ret = 0;
 262
 263 err_out:
 264         kfree(rule_buf);
 265
 266         return ret;
 267 }
 268
 269 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 270 {
 271         struct ethtool_regs regs;
 272         const struct ethtool_ops *ops = dev->ethtool_ops;
 273         void *regbuf;
 274         int reglen, ret;
 275
 276         if (!ops->get_regs || !ops->get_regs_len)
 277                 return -EOPNOTSUPP;
 278
 279         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 280                 return -EFAULT;
 281
 282         reglen = ops->get_regs_len(dev);
 283         if (regs.len > reglen)
 284                 regs.len = reglen;
 285
 286         regbuf = kmalloc(reglen, GFP_USER);
 287         if (!regbuf)
 288                 return -ENOMEM;
 289
 290         ops->get_regs(dev, &regs, regbuf);
 291
 292         ret = -EFAULT;
 293         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 294                 goto out;
 295         useraddr += offsetof(struct ethtool_regs, data);
 296         if (copy_to_user(useraddr, regbuf, regs.len))
 297                 goto out;
 298         ret = 0;
 299
 300  out:
 301         kfree(regbuf);
 302         return ret;
 303 }
 304
 305 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 306 {
 307         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 308
 309         if (!dev->ethtool_ops->get_wol)
 310                 return -EOPNOTSUPP;
 311
 312         dev->ethtool_ops->get_wol(dev, &wol);
 313
 314         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 315                 return -EFAULT;
 316         return 0;
 317 }
 318
 319 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 320 {
 321         struct ethtool_wolinfo wol;
 322
 323         if (!dev->ethtool_ops->set_wol)
 324                 return -EOPNOTSUPP;
 325
 326         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 327                 return -EFAULT;
 328
 329         return dev->ethtool_ops->set_wol(dev, &wol);
 330 }
 331
 332 static int ethtool_nway_reset(struct net_device *dev)
 333 {
 334         if (!dev->ethtool_ops->nway_reset)
 335                 return -EOPNOTSUPP;
 336
 337         return dev->ethtool_ops->nway_reset(dev);
 338 }
 339
 340 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 341 {
 342         struct ethtool_eeprom eeprom;
 343         const struct ethtool_ops *ops = dev->ethtool_ops;
 344         void __user *userbuf = useraddr + sizeof(eeprom);
 345         u32 bytes_remaining;
 346         u8 *data;
 347         int ret = 0;
 348
 349         if (!ops->get_eeprom || !ops->get_eeprom_len)
 350                 return -EOPNOTSUPP;
 351
 352         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 353                 return -EFAULT;
 354
 355         /* Check for wrap and zero */
 356         if (eeprom.offset + eeprom.len <= eeprom.offset)
 357                 return -EINVAL;
 358
 359         /* Check for exceeding total eeprom len */
 360         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 361                 return -EINVAL;
 362
 363         data = kmalloc(PAGE_SIZE, GFP_USER);
 364         if (!data)
 365                 return -ENOMEM;
 366
 367         bytes_remaining = eeprom.len;
 368         while (bytes_remaining > 0) {
 369                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
 370
 371                 ret = ops->get_eeprom(dev, &eeprom, data);
 372                 if (ret)
 373                         break;
 374                 if (copy_to_user(userbuf, data, eeprom.len)) {
 375                         ret = -EFAULT;
 376                         break;
 377                 }
 378                 userbuf += eeprom.len;
 379                 eeprom.offset += eeprom.len;
 380                 bytes_remaining -= eeprom.len;
 381         }
 382
 383         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
 384         eeprom.offset -= eeprom.len;
 385         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 386                 ret = -EFAULT;
 387
 388         kfree(data);
 389         return ret;
 390 }
 391
 392 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 393 {
 394         struct ethtool_eeprom eeprom;
 395         const struct ethtool_ops *ops = dev->ethtool_ops;
 396         void __user *userbuf = useraddr + sizeof(eeprom);
 397         u32 bytes_remaining;
 398         u8 *data;
 399         int ret = 0;
 400
 401         if (!ops->set_eeprom || !ops->get_eeprom_len)
 402                 return -EOPNOTSUPP;
 403
 404         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 405                 return -EFAULT;
 406
 407         /* Check for wrap and zero */
 408         if (eeprom.offset + eeprom.len <= eeprom.offset)
 409                 return -EINVAL;
 410
 411         /* Check for exceeding total eeprom len */
 412         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 413                 return -EINVAL;
 414
 415         data = kmalloc(PAGE_SIZE, GFP_USER);
 416         if (!data)
 417                 return -ENOMEM;
 418
 419         bytes_remaining = eeprom.len;
 420         while (bytes_remaining > 0) {
 421                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
 422
 423                 if (copy_from_user(data, userbuf, eeprom.len)) {
 424                         ret = -EFAULT;
 425                         break;
 426                 }
 427                 ret = ops->set_eeprom(dev, &eeprom, data);
 428                 if (ret)
 429                         break;
 430                 userbuf += eeprom.len;
 431                 eeprom.offset += eeprom.len;
 432                 bytes_remaining -= eeprom.len;
 433         }
 434
 435         kfree(data);
 436         return ret;
 437 }
 438
 439 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 440 {
 441         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 442
 443         if (!dev->ethtool_ops->get_coalesce)
 444                 return -EOPNOTSUPP;
 445
 446         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 447
 448         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 449                 return -EFAULT;
 450         return 0;
 451 }
 452
 453 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 454 {
 455         struct ethtool_coalesce coalesce;
 456
 457         if (!dev->ethtool_ops->set_coalesce)
 458                 return -EOPNOTSUPP;
 459
 460         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 461                 return -EFAULT;
 462
 463         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 464 }
 465
 466 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 467 {
 468         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 469
 470         if (!dev->ethtool_ops->get_ringparam)
 471                 return -EOPNOTSUPP;
 472
 473         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 474
 475         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 476                 return -EFAULT;
 477         return 0;
 478 }
 479
 480 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 481 {
 482         struct ethtool_ringparam ringparam;
 483
 484         if (!dev->ethtool_ops->set_ringparam)
 485                 return -EOPNOTSUPP;
 486
 487         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 488                 return -EFAULT;
 489
 490         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 491 }
 492
 493 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 494 {
 495         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 496
 497         if (!dev->ethtool_ops->get_pauseparam)
 498                 return -EOPNOTSUPP;
 499
 500         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 501
 502         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 503                 return -EFAULT;
 504         return 0;
 505 }
 506
 507 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 508 {
 509         struct ethtool_pauseparam pauseparam;
 510
 511         if (!dev->ethtool_ops->set_pauseparam)
 512                 return -EOPNOTSUPP;
 513
 514         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 515                 return -EFAULT;
 516
 517         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 518 }
 519
 520 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 521 {
 522         int err;
 523
 524         if (!data && dev->ethtool_ops->set_tso) {
 525                 err = dev->ethtool_ops->set_tso(dev, 0);
 526                 if (err)
 527                         return err;
 528         }
 529
 530         if (!data && dev->ethtool_ops->set_ufo) {
 531                 err = dev->ethtool_ops->set_ufo(dev, 0);
 532                 if (err)
 533                         return err;
 534         }
 535         return dev->ethtool_ops->set_sg(dev, data);
 536 }
 537
 538 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 539 {
 540         struct ethtool_value edata;
 541         int err;
 542
 543         if (!dev->ethtool_ops->set_tx_csum)
 544                 return -EOPNOTSUPP;
 545
 546         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 547                 return -EFAULT;
 548
 549         if (!edata.data && dev->ethtool_ops->set_sg) {
 550                 err = __ethtool_set_sg(dev, 0);
 551                 if (err)
 552                         return err;
 553         }
 554
 555         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 556 }
 557
 558 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
 559 {
 560         struct ethtool_value edata;
 561
 562         if (!dev->ethtool_ops->set_rx_csum)
 563                 return -EOPNOTSUPP;
 564
 565         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 566                 return -EFAULT;
 567
 568         if (!edata.data && dev->ethtool_ops->set_sg)
 569                 dev->features &= ~NETIF_F_GRO;
 570
 571         return dev->ethtool_ops->set_rx_csum(dev, edata.data);
 572 }
 573
 574 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 575 {
 576         struct ethtool_value edata;
 577
 578         if (!dev->ethtool_ops->set_sg)
 579                 return -EOPNOTSUPP;
 580
 581         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 582                 return -EFAULT;
 583
 584         if (edata.data &&
 585             !(dev->features & NETIF_F_ALL_CSUM))
 586                 return -EINVAL;
 587
 588         return __ethtool_set_sg(dev, edata.data);
 589 }
 590
 591 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 592 {
 593         struct ethtool_value edata;
 594
 595         if (!dev->ethtool_ops->set_tso)
 596                 return -EOPNOTSUPP;
 597
 598         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 599                 return -EFAULT;
 600
 601         if (edata.data && !(dev->features & NETIF_F_SG))
 602                 return -EINVAL;
 603
 604         return dev->ethtool_ops->set_tso(dev, edata.data);
 605 }
 606
 607 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 608 {
 609         struct ethtool_value edata;
 610
 611         if (!dev->ethtool_ops->set_ufo)
 612                 return -EOPNOTSUPP;
 613         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 614                 return -EFAULT;
 615         if (edata.data && !(dev->features & NETIF_F_SG))
 616                 return -EINVAL;
 617         if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 618                 return -EINVAL;
 619         return dev->ethtool_ops->set_ufo(dev, edata.data);
 620 }
 621
 622 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 623 {
 624         struct ethtool_value edata = { ETHTOOL_GGSO };
 625
 626         edata.data = dev->features & NETIF_F_GSO;
 627         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 628                  return -EFAULT;
 629         return 0;
 630 }
 631
 632 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 633 {
 634         struct ethtool_value edata;
 635
 636         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 637                 return -EFAULT;
 638         if (edata.data)
 639                 dev->features |= NETIF_F_GSO;
 640         else
 641                 dev->features &= ~NETIF_F_GSO;
 642         return 0;
 643 }
 644
 645 static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
 646 {
 647         struct ethtool_value edata = { ETHTOOL_GGRO };
 648
 649         edata.data = dev->features & NETIF_F_GRO;
 650         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 651                  return -EFAULT;
 652         return 0;
 653 }
 654
 655 static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
 656 {
 657         struct ethtool_value edata;
 658
 659         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 660                 return -EFAULT;
 661
 662         if (edata.data) {
 663                 if (!dev->ethtool_ops->get_rx_csum ||
 664                     !dev->ethtool_ops->get_rx_csum(dev))
 665                         return -EINVAL;
 666                 dev->features |= NETIF_F_GRO;
 667         } else
 668                 dev->features &= ~NETIF_F_GRO;
 669
 670         return 0;
 671 }
 672
 673 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 674 {
 675         struct ethtool_test test;
 676         const struct ethtool_ops *ops = dev->ethtool_ops;
 677         u64 *data;
 678         int ret, test_len;
 679
 680         if (!ops->self_test)
 681                 return -EOPNOTSUPP;
 682         if (!ops->get_sset_count && !ops->self_test_count)
 683                 return -EOPNOTSUPP;
 684
 685         if (ops->get_sset_count)
 686                 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
 687         else
 688                 /* code path for obsolete hook */
 689                 test_len = ops->self_test_count(dev);
 690         if (test_len < 0)
 691                 return test_len;
 692         WARN_ON(test_len == 0);
 693
 694         if (copy_from_user(&test, useraddr, sizeof(test)))
 695                 return -EFAULT;
 696
 697         test.len = test_len;
 698         data = kmalloc(test_len * sizeof(u64), GFP_USER);
 699         if (!data)
 700                 return -ENOMEM;
 701
 702         ops->self_test(dev, &test, data);
 703
 704         ret = -EFAULT;
 705         if (copy_to_user(useraddr, &test, sizeof(test)))
 706                 goto out;
 707         useraddr += sizeof(test);
 708         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 709                 goto out;
 710         ret = 0;
 711
 712  out:
 713         kfree(data);
 714         return ret;
 715 }
 716
 717 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 718 {
 719         struct ethtool_gstrings gstrings;
 720         const struct ethtool_ops *ops = dev->ethtool_ops;
 721         u8 *data;
 722         int ret;
 723
 724         if (!ops->get_strings)
 725                 return -EOPNOTSUPP;
 726
 727         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 728                 return -EFAULT;
 729
 730         if (ops->get_sset_count) {
 731                 ret = ops->get_sset_count(dev, gstrings.string_set);
 732                 if (ret < 0)
 733                         return ret;
 734
 735                 gstrings.len = ret;
 736         } else {
 737                 /* code path for obsolete hooks */
 738
 739                 switch (gstrings.string_set) {
 740                 case ETH_SS_TEST:
 741                         if (!ops->self_test_count)
 742                                 return -EOPNOTSUPP;
 743                         gstrings.len = ops->self_test_count(dev);
 744                         break;
 745                 case ETH_SS_STATS:
 746                         if (!ops->get_stats_count)
 747                                 return -EOPNOTSUPP;
 748                         gstrings.len = ops->get_stats_count(dev);
 749                         break;
 750                 default:
 751                         return -EINVAL;
 752                 }
 753         }
 754
 755         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 756         if (!data)
 757                 return -ENOMEM;
 758
 759         ops->get_strings(dev, gstrings.string_set, data);
 760
 761         ret = -EFAULT;
 762         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 763                 goto out;
 764         useraddr += sizeof(gstrings);
 765         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 766                 goto out;
 767         ret = 0;
 768
 769  out:
 770         kfree(data);
 771         return ret;
 772 }
 773
 774 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 775 {
 776         struct ethtool_value id;
 777
 778         if (!dev->ethtool_ops->phys_id)
 779                 return -EOPNOTSUPP;
 780
 781         if (copy_from_user(&id, useraddr, sizeof(id)))
 782                 return -EFAULT;
 783
 784         return dev->ethtool_ops->phys_id(dev, id.data);
 785 }
 786
 787 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 788 {
 789         struct ethtool_stats stats;
 790         const struct ethtool_ops *ops = dev->ethtool_ops;
 791         u64 *data;
 792         int ret, n_stats;
 793
 794         if (!ops->get_ethtool_stats)
 795                 return -EOPNOTSUPP;
 796         if (!ops->get_sset_count && !ops->get_stats_count)
 797                 return -EOPNOTSUPP;
 798
 799         if (ops->get_sset_count)
 800                 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
 801         else
 802                 /* code path for obsolete hook */
 803                 n_stats = ops->get_stats_count(dev);
 804         if (n_stats < 0)
 805                 return n_stats;
 806         WARN_ON(n_stats == 0);
 807
 808         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 809                 return -EFAULT;
 810
 811         stats.n_stats = n_stats;
 812         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
 813         if (!data)
 814                 return -ENOMEM;
 815
 816         ops->get_ethtool_stats(dev, &stats, data);
 817
 818         ret = -EFAULT;
 819         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 820                 goto out;
 821         useraddr += sizeof(stats);
 822         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 823                 goto out;
 824         ret = 0;
 825
 826  out:
 827         kfree(data);
 828         return ret;
 829 }
 830
 831 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 832 {
 833         struct ethtool_perm_addr epaddr;
 834
 835         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
 836                 return -EFAULT;
 837
 838         if (epaddr.size < dev->addr_len)
 839                 return -ETOOSMALL;
 840         epaddr.size = dev->addr_len;
 841
 842         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 843                 return -EFAULT;
 844         useraddr += sizeof(epaddr);
 845         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
 846                 return -EFAULT;
 847         return 0;
 848 }
 849
 850 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
 851                              u32 cmd, u32 (*actor)(struct net_device *))
 852 {
 853         struct ethtool_value edata = { cmd };
 854
 855         if (!actor)
 856                 return -EOPNOTSUPP;
 857
 858         edata.data = actor(dev);
 859
 860         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 861                 return -EFAULT;
 862         return 0;
 863 }
 864
 865 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
 866                              void (*actor)(struct net_device *, u32))
 867 {
 868         struct ethtool_value edata;
 869
 870         if (!actor)
 871                 return -EOPNOTSUPP;
 872
 873         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 874                 return -EFAULT;
 875
 876         actor(dev, edata.data);
 877         return 0;
 878 }
 879
 880 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
 881                              int (*actor)(struct net_device *, u32))
 882 {
 883         struct ethtool_value edata;
 884
 885         if (!actor)
 886                 return -EOPNOTSUPP;
 887
 888         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 889                 return -EFAULT;
 890
 891         return actor(dev, edata.data);
 892 }
 893
 894 /* The main entry point in this file.  Called from net/core/dev.c */
 895
 896 int dev_ethtool(struct net *net, struct ifreq *ifr)
 897 {
 898         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
 899         void __user *useraddr = ifr->ifr_data;
 900         u32 ethcmd;
 901         int rc;
 902         unsigned long old_features;
 903
 904         if (!dev || !netif_device_present(dev))
 905                 return -ENODEV;
 906
 907         if (!dev->ethtool_ops)
 908                 return -EOPNOTSUPP;
 909
 910         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 911                 return -EFAULT;
 912
 913         /* Allow some commands to be done by anyone */
 914         switch(ethcmd) {
 915         case ETHTOOL_GDRVINFO:
 916         case ETHTOOL_GMSGLVL:
 917         case ETHTOOL_GCOALESCE:
 918         case ETHTOOL_GRINGPARAM:
 919         case ETHTOOL_GPAUSEPARAM:
 920         case ETHTOOL_GRXCSUM:
 921         case ETHTOOL_GTXCSUM:
 922         case ETHTOOL_GSG:
 923         case ETHTOOL_GSTRINGS:
 924         case ETHTOOL_GTSO:
 925         case ETHTOOL_GPERMADDR:
 926         case ETHTOOL_GUFO:
 927         case ETHTOOL_GGSO:
 928         case ETHTOOL_GFLAGS:
 929         case ETHTOOL_GPFLAGS:
 930         case ETHTOOL_GRXFH:
 931         case ETHTOOL_GRXRINGS:
 932         case ETHTOOL_GRXCLSRLCNT:
 933         case ETHTOOL_GRXCLSRULE:
 934         case ETHTOOL_GRXCLSRLALL:
 935                 break;
 936         default:
 937                 if (!capable(CAP_NET_ADMIN))
 938                         return -EPERM;
 939         }
 940
 941         if (dev->ethtool_ops->begin)
 942                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 943                         return rc;
 944
 945         old_features = dev->features;
 946
 947         switch (ethcmd) {
 948         case ETHTOOL_GSET:
 949                 rc = ethtool_get_settings(dev, useraddr);
 950                 break;
 951         case ETHTOOL_SSET:
 952                 rc = ethtool_set_settings(dev, useraddr);
 953                 break;
 954         case ETHTOOL_GDRVINFO:
 955                 rc = ethtool_get_drvinfo(dev, useraddr);
 956                 break;
 957         case ETHTOOL_GREGS:
 958                 rc = ethtool_get_regs(dev, useraddr);
 959                 break;
 960         case ETHTOOL_GWOL:
 961                 rc = ethtool_get_wol(dev, useraddr);
 962                 break;
 963         case ETHTOOL_SWOL:
 964                 rc = ethtool_set_wol(dev, useraddr);
 965                 break;
 966         case ETHTOOL_GMSGLVL:
 967                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 968                                        dev->ethtool_ops->get_msglevel);
 969                 break;
 970         case ETHTOOL_SMSGLVL:
 971                 rc = ethtool_set_value_void(dev, useraddr,
 972                                        dev->ethtool_ops->set_msglevel);
 973                 break;
 974         case ETHTOOL_NWAY_RST:
 975                 rc = ethtool_nway_reset(dev);
 976                 break;
 977         case ETHTOOL_GLINK:
 978                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 979                                        dev->ethtool_ops->get_link);
 980                 break;
 981         case ETHTOOL_GEEPROM:
 982                 rc = ethtool_get_eeprom(dev, useraddr);
 983                 break;
 984         case ETHTOOL_SEEPROM:
 985                 rc = ethtool_set_eeprom(dev, useraddr);
 986                 break;
 987         case ETHTOOL_GCOALESCE:
 988                 rc = ethtool_get_coalesce(dev, useraddr);
 989                 break;
 990         case ETHTOOL_SCOALESCE:
 991                 rc = ethtool_set_coalesce(dev, useraddr);
 992                 break;
 993         case ETHTOOL_GRINGPARAM:
 994                 rc = ethtool_get_ringparam(dev, useraddr);
 995                 break;
 996         case ETHTOOL_SRINGPARAM:
 997                 rc = ethtool_set_ringparam(dev, useraddr);
 998                 break;
 999         case ETHTOOL_GPAUSEPARAM:
1000                 rc = ethtool_get_pauseparam(dev, useraddr);
1001                 break;
1002         case ETHTOOL_SPAUSEPARAM:
1003                 rc = ethtool_set_pauseparam(dev, useraddr);
1004                 break;
1005         case ETHTOOL_GRXCSUM:
1006                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1007                                        dev->ethtool_ops->get_rx_csum);
1008                 break;
1009         case ETHTOOL_SRXCSUM:
1010                 rc = ethtool_set_rx_csum(dev, useraddr);
1011                 break;
1012         case ETHTOOL_GTXCSUM:
1013                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1014                                        (dev->ethtool_ops->get_tx_csum ?
1015                                         dev->ethtool_ops->get_tx_csum :
1016                                         ethtool_op_get_tx_csum));
1017                 break;
1018         case ETHTOOL_STXCSUM:
1019                 rc = ethtool_set_tx_csum(dev, useraddr);
1020                 break;
1021         case ETHTOOL_GSG:
1022                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1023                                        (dev->ethtool_ops->get_sg ?
1024                                         dev->ethtool_ops->get_sg :
1025                                         ethtool_op_get_sg));
1026                 break;
1027         case ETHTOOL_SSG:
1028                 rc = ethtool_set_sg(dev, useraddr);
1029                 break;
1030         case ETHTOOL_GTSO:
1031                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1032                                        (dev->ethtool_ops->get_tso ?
1033                                         dev->ethtool_ops->get_tso :
1034                                         ethtool_op_get_tso));
1035                 break;
1036         case ETHTOOL_STSO:
1037                 rc = ethtool_set_tso(dev, useraddr);
1038                 break;
1039         case ETHTOOL_TEST:
1040                 rc = ethtool_self_test(dev, useraddr);
1041                 break;
1042         case ETHTOOL_GSTRINGS:
1043                 rc = ethtool_get_strings(dev, useraddr);
1044                 break;
1045         case ETHTOOL_PHYS_ID:
1046                 rc = ethtool_phys_id(dev, useraddr);
1047                 break;
1048         case ETHTOOL_GSTATS:
1049                 rc = ethtool_get_stats(dev, useraddr);
1050                 break;
1051         case ETHTOOL_GPERMADDR:
1052                 rc = ethtool_get_perm_addr(dev, useraddr);
1053                 break;
1054         case ETHTOOL_GUFO:
1055                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1056                                        (dev->ethtool_ops->get_ufo ?
1057                                         dev->ethtool_ops->get_ufo :
1058                                         ethtool_op_get_ufo));
1059                 break;
1060         case ETHTOOL_SUFO:
1061                 rc = ethtool_set_ufo(dev, useraddr);
1062                 break;
1063         case ETHTOOL_GGSO:
1064                 rc = ethtool_get_gso(dev, useraddr);
1065                 break;
1066         case ETHTOOL_SGSO:
1067                 rc = ethtool_set_gso(dev, useraddr);
1068                 break;
1069         case ETHTOOL_GFLAGS:
1070                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1071                                        dev->ethtool_ops->get_flags);
1072                 break;
1073         case ETHTOOL_SFLAGS:
1074                 rc = ethtool_set_value(dev, useraddr,
1075                                        dev->ethtool_ops->set_flags);
1076                 break;
1077         case ETHTOOL_GPFLAGS:
1078                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1079                                        dev->ethtool_ops->get_priv_flags);
1080                 break;
1081         case ETHTOOL_SPFLAGS:
1082                 rc = ethtool_set_value(dev, useraddr,
1083                                        dev->ethtool_ops->set_priv_flags);
1084                 break;
1085         case ETHTOOL_GRXFH:
1086         case ETHTOOL_GRXRINGS:
1087         case ETHTOOL_GRXCLSRLCNT:
1088         case ETHTOOL_GRXCLSRULE:
1089         case ETHTOOL_GRXCLSRLALL:
1090                 rc = ethtool_get_rxnfc(dev, useraddr);
1091                 break;
1092         case ETHTOOL_SRXFH:
1093         case ETHTOOL_SRXCLSRLDEL:
1094         case ETHTOOL_SRXCLSRLINS:
1095                 rc = ethtool_set_rxnfc(dev, useraddr);
1096                 break;
1097         case ETHTOOL_GGRO:
1098                 rc = ethtool_get_gro(dev, useraddr);
1099                 break;
1100         case ETHTOOL_SGRO:
1101                 rc = ethtool_set_gro(dev, useraddr);
1102                 break;
1103         default:
1104                 rc = -EOPNOTSUPP;
1105         }
1106
1107         if (dev->ethtool_ops->complete)
1108                 dev->ethtool_ops->complete(dev);
1109
1110         if (old_features != dev->features)
1111                 netdev_features_change(dev);
1112
1113         return rc;
1114 }
1115
1116 EXPORT_SYMBOL(ethtool_op_get_link);
1117 EXPORT_SYMBOL(ethtool_op_get_sg);
1118 EXPORT_SYMBOL(ethtool_op_get_tso);
1119 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
1120 EXPORT_SYMBOL(ethtool_op_set_sg);
1121 EXPORT_SYMBOL(ethtool_op_set_tso);
1122 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1123 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
1124 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
1125 EXPORT_SYMBOL(ethtool_op_set_ufo);
1126 EXPORT_SYMBOL(ethtool_op_get_ufo);
1127 EXPORT_SYMBOL(ethtool_op_set_flags);
1128 EXPORT_SYMBOL(ethtool_op_get_flags);