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->self_test_count)
 183                 info.testinfo_len = ops->self_test_count(dev);
 184         if (ops->get_stats_count)
 185                 info.n_stats = ops->get_stats_count(dev);
 186         if (ops->get_regs_len)
 187                 info.regdump_len = ops->get_regs_len(dev);
 188         if (ops->get_eeprom_len)
 189                 info.eedump_len = ops->get_eeprom_len(dev);
 190
 191         if (copy_to_user(useraddr, &info, sizeof(info)))
 192                 return -EFAULT;
 193         return 0;
 194 }
 195
 196 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 197 {
 198         struct ethtool_regs regs;
 199         const struct ethtool_ops *ops = dev->ethtool_ops;
 200         void *regbuf;
 201         int reglen, ret;
 202
 203         if (!ops->get_regs || !ops->get_regs_len)
 204                 return -EOPNOTSUPP;
 205
 206         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 207                 return -EFAULT;
 208
 209         reglen = ops->get_regs_len(dev);
 210         if (regs.len > reglen)
 211                 regs.len = reglen;
 212
 213         regbuf = kmalloc(reglen, GFP_USER);
 214         if (!regbuf)
 215                 return -ENOMEM;
 216
 217         ops->get_regs(dev, &regs, regbuf);
 218
 219         ret = -EFAULT;
 220         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 221                 goto out;
 222         useraddr += offsetof(struct ethtool_regs, data);
 223         if (copy_to_user(useraddr, regbuf, regs.len))
 224                 goto out;
 225         ret = 0;
 226
 227  out:
 228         kfree(regbuf);
 229         return ret;
 230 }
 231
 232 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 233 {
 234         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 235
 236         if (!dev->ethtool_ops->get_wol)
 237                 return -EOPNOTSUPP;
 238
 239         dev->ethtool_ops->get_wol(dev, &wol);
 240
 241         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 242                 return -EFAULT;
 243         return 0;
 244 }
 245
 246 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 247 {
 248         struct ethtool_wolinfo wol;
 249
 250         if (!dev->ethtool_ops->set_wol)
 251                 return -EOPNOTSUPP;
 252
 253         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 254                 return -EFAULT;
 255
 256         return dev->ethtool_ops->set_wol(dev, &wol);
 257 }
 258
 259 static int ethtool_get_msglevel(struct net_device *dev, char __user *useraddr)
 260 {
 261         struct ethtool_value edata = { ETHTOOL_GMSGLVL };
 262
 263         if (!dev->ethtool_ops->get_msglevel)
 264                 return -EOPNOTSUPP;
 265
 266         edata.data = dev->ethtool_ops->get_msglevel(dev);
 267
 268         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 269                 return -EFAULT;
 270         return 0;
 271 }
 272
 273 static int ethtool_set_msglevel(struct net_device *dev, char __user *useraddr)
 274 {
 275         struct ethtool_value edata;
 276
 277         if (!dev->ethtool_ops->set_msglevel)
 278                 return -EOPNOTSUPP;
 279
 280         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 281                 return -EFAULT;
 282
 283         dev->ethtool_ops->set_msglevel(dev, edata.data);
 284         return 0;
 285 }
 286
 287 static int ethtool_nway_reset(struct net_device *dev)
 288 {
 289         if (!dev->ethtool_ops->nway_reset)
 290                 return -EOPNOTSUPP;
 291
 292         return dev->ethtool_ops->nway_reset(dev);
 293 }
 294
 295 static int ethtool_get_link(struct net_device *dev, void __user *useraddr)
 296 {
 297         struct ethtool_value edata = { ETHTOOL_GLINK };
 298
 299         if (!dev->ethtool_ops->get_link)
 300                 return -EOPNOTSUPP;
 301
 302         edata.data = dev->ethtool_ops->get_link(dev);
 303
 304         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 305                 return -EFAULT;
 306         return 0;
 307 }
 308
 309 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 310 {
 311         struct ethtool_eeprom eeprom;
 312         const struct ethtool_ops *ops = dev->ethtool_ops;
 313         u8 *data;
 314         int ret;
 315
 316         if (!ops->get_eeprom || !ops->get_eeprom_len)
 317                 return -EOPNOTSUPP;
 318
 319         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 320                 return -EFAULT;
 321
 322         /* Check for wrap and zero */
 323         if (eeprom.offset + eeprom.len <= eeprom.offset)
 324                 return -EINVAL;
 325
 326         /* Check for exceeding total eeprom len */
 327         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 328                 return -EINVAL;
 329
 330         data = kmalloc(eeprom.len, GFP_USER);
 331         if (!data)
 332                 return -ENOMEM;
 333
 334         ret = -EFAULT;
 335         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 336                 goto out;
 337
 338         ret = ops->get_eeprom(dev, &eeprom, data);
 339         if (ret)
 340                 goto out;
 341
 342         ret = -EFAULT;
 343         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 344                 goto out;
 345         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 346                 goto out;
 347         ret = 0;
 348
 349  out:
 350         kfree(data);
 351         return ret;
 352 }
 353
 354 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 355 {
 356         struct ethtool_eeprom eeprom;
 357         const struct ethtool_ops *ops = dev->ethtool_ops;
 358         u8 *data;
 359         int ret;
 360
 361         if (!ops->set_eeprom || !ops->get_eeprom_len)
 362                 return -EOPNOTSUPP;
 363
 364         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 365                 return -EFAULT;
 366
 367         /* Check for wrap and zero */
 368         if (eeprom.offset + eeprom.len <= eeprom.offset)
 369                 return -EINVAL;
 370
 371         /* Check for exceeding total eeprom len */
 372         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 373                 return -EINVAL;
 374
 375         data = kmalloc(eeprom.len, GFP_USER);
 376         if (!data)
 377                 return -ENOMEM;
 378
 379         ret = -EFAULT;
 380         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 381                 goto out;
 382
 383         ret = ops->set_eeprom(dev, &eeprom, data);
 384         if (ret)
 385                 goto out;
 386
 387         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 388                 ret = -EFAULT;
 389
 390  out:
 391         kfree(data);
 392         return ret;
 393 }
 394
 395 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 396 {
 397         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 398
 399         if (!dev->ethtool_ops->get_coalesce)
 400                 return -EOPNOTSUPP;
 401
 402         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 403
 404         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 405                 return -EFAULT;
 406         return 0;
 407 }
 408
 409 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 410 {
 411         struct ethtool_coalesce coalesce;
 412
 413         if (!dev->ethtool_ops->set_coalesce)
 414                 return -EOPNOTSUPP;
 415
 416         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 417                 return -EFAULT;
 418
 419         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 420 }
 421
 422 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 423 {
 424         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 425
 426         if (!dev->ethtool_ops->get_ringparam)
 427                 return -EOPNOTSUPP;
 428
 429         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 430
 431         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 432                 return -EFAULT;
 433         return 0;
 434 }
 435
 436 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 437 {
 438         struct ethtool_ringparam ringparam;
 439
 440         if (!dev->ethtool_ops->set_ringparam)
 441                 return -EOPNOTSUPP;
 442
 443         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 444                 return -EFAULT;
 445
 446         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 447 }
 448
 449 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 450 {
 451         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 452
 453         if (!dev->ethtool_ops->get_pauseparam)
 454                 return -EOPNOTSUPP;
 455
 456         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 457
 458         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 459                 return -EFAULT;
 460         return 0;
 461 }
 462
 463 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 464 {
 465         struct ethtool_pauseparam pauseparam;
 466
 467         if (!dev->ethtool_ops->set_pauseparam)
 468                 return -EOPNOTSUPP;
 469
 470         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 471                 return -EFAULT;
 472
 473         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 474 }
 475
 476 static int ethtool_get_rx_csum(struct net_device *dev, char __user *useraddr)
 477 {
 478         struct ethtool_value edata = { ETHTOOL_GRXCSUM };
 479
 480         if (!dev->ethtool_ops->get_rx_csum)
 481                 return -EOPNOTSUPP;
 482
 483         edata.data = dev->ethtool_ops->get_rx_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_rx_csum(struct net_device *dev, char __user *useraddr)
 491 {
 492         struct ethtool_value edata;
 493
 494         if (!dev->ethtool_ops->set_rx_csum)
 495                 return -EOPNOTSUPP;
 496
 497         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 498                 return -EFAULT;
 499
 500         dev->ethtool_ops->set_rx_csum(dev, edata.data);
 501         return 0;
 502 }
 503
 504 static int ethtool_get_tx_csum(struct net_device *dev, char __user *useraddr)
 505 {
 506         struct ethtool_value edata = { ETHTOOL_GTXCSUM };
 507
 508         if (!dev->ethtool_ops->get_tx_csum)
 509                 return -EOPNOTSUPP;
 510
 511         edata.data = dev->ethtool_ops->get_tx_csum(dev);
 512
 513         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 514                 return -EFAULT;
 515         return 0;
 516 }
 517
 518 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 519 {
 520         int err;
 521
 522         if (!data && dev->ethtool_ops->set_tso) {
 523                 err = dev->ethtool_ops->set_tso(dev, 0);
 524                 if (err)
 525                         return err;
 526         }
 527
 528         if (!data && dev->ethtool_ops->set_ufo) {
 529                 err = dev->ethtool_ops->set_ufo(dev, 0);
 530                 if (err)
 531                         return err;
 532         }
 533         return dev->ethtool_ops->set_sg(dev, data);
 534 }
 535
 536 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 537 {
 538         struct ethtool_value edata;
 539         int err;
 540
 541         if (!dev->ethtool_ops->set_tx_csum)
 542                 return -EOPNOTSUPP;
 543
 544         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 545                 return -EFAULT;
 546
 547         if (!edata.data && dev->ethtool_ops->set_sg) {
 548                 err = __ethtool_set_sg(dev, 0);
 549                 if (err)
 550                         return err;
 551         }
 552
 553         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 554 }
 555
 556 static int ethtool_get_sg(struct net_device *dev, char __user *useraddr)
 557 {
 558         struct ethtool_value edata = { ETHTOOL_GSG };
 559
 560         if (!dev->ethtool_ops->get_sg)
 561                 return -EOPNOTSUPP;
 562
 563         edata.data = dev->ethtool_ops->get_sg(dev);
 564
 565         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 566                 return -EFAULT;
 567         return 0;
 568 }
 569
 570 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 571 {
 572         struct ethtool_value edata;
 573
 574         if (!dev->ethtool_ops->set_sg)
 575                 return -EOPNOTSUPP;
 576
 577         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 578                 return -EFAULT;
 579
 580         if (edata.data &&
 581             !(dev->features & NETIF_F_ALL_CSUM))
 582                 return -EINVAL;
 583
 584         return __ethtool_set_sg(dev, edata.data);
 585 }
 586
 587 static int ethtool_get_tso(struct net_device *dev, char __user *useraddr)
 588 {
 589         struct ethtool_value edata = { ETHTOOL_GTSO };
 590
 591         if (!dev->ethtool_ops->get_tso)
 592                 return -EOPNOTSUPP;
 593
 594         edata.data = dev->ethtool_ops->get_tso(dev);
 595
 596         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 597                 return -EFAULT;
 598         return 0;
 599 }
 600
 601 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 602 {
 603         struct ethtool_value edata;
 604
 605         if (!dev->ethtool_ops->set_tso)
 606                 return -EOPNOTSUPP;
 607
 608         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 609                 return -EFAULT;
 610
 611         if (edata.data && !(dev->features & NETIF_F_SG))
 612                 return -EINVAL;
 613
 614         return dev->ethtool_ops->set_tso(dev, edata.data);
 615 }
 616
 617 static int ethtool_get_ufo(struct net_device *dev, char __user *useraddr)
 618 {
 619         struct ethtool_value edata = { ETHTOOL_GUFO };
 620
 621         if (!dev->ethtool_ops->get_ufo)
 622                 return -EOPNOTSUPP;
 623         edata.data = dev->ethtool_ops->get_ufo(dev);
 624         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 625                  return -EFAULT;
 626         return 0;
 627 }
 628
 629 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 630 {
 631         struct ethtool_value edata;
 632
 633         if (!dev->ethtool_ops->set_ufo)
 634                 return -EOPNOTSUPP;
 635         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 636                 return -EFAULT;
 637         if (edata.data && !(dev->features & NETIF_F_SG))
 638                 return -EINVAL;
 639         if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 640                 return -EINVAL;
 641         return dev->ethtool_ops->set_ufo(dev, edata.data);
 642 }
 643
 644 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 645 {
 646         struct ethtool_value edata = { ETHTOOL_GGSO };
 647
 648         edata.data = dev->features & NETIF_F_GSO;
 649         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 650                  return -EFAULT;
 651         return 0;
 652 }
 653
 654 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 655 {
 656         struct ethtool_value edata;
 657
 658         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 659                 return -EFAULT;
 660         if (edata.data)
 661                 dev->features |= NETIF_F_GSO;
 662         else
 663                 dev->features &= ~NETIF_F_GSO;
 664         return 0;
 665 }
 666
 667 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 668 {
 669         struct ethtool_test test;
 670         const struct ethtool_ops *ops = dev->ethtool_ops;
 671         u64 *data;
 672         int ret;
 673
 674         if (!ops->self_test || !ops->self_test_count)
 675                 return -EOPNOTSUPP;
 676
 677         if (copy_from_user(&test, useraddr, sizeof(test)))
 678                 return -EFAULT;
 679
 680         test.len = ops->self_test_count(dev);
 681         data = kmalloc(test.len * sizeof(u64), GFP_USER);
 682         if (!data)
 683                 return -ENOMEM;
 684
 685         ops->self_test(dev, &test, data);
 686
 687         ret = -EFAULT;
 688         if (copy_to_user(useraddr, &test, sizeof(test)))
 689                 goto out;
 690         useraddr += sizeof(test);
 691         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 692                 goto out;
 693         ret = 0;
 694
 695  out:
 696         kfree(data);
 697         return ret;
 698 }
 699
 700 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 701 {
 702         struct ethtool_gstrings gstrings;
 703         const struct ethtool_ops *ops = dev->ethtool_ops;
 704         u8 *data;
 705         int ret;
 706
 707         if (!ops->get_strings)
 708                 return -EOPNOTSUPP;
 709
 710         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 711                 return -EFAULT;
 712
 713         switch (gstrings.string_set) {
 714         case ETH_SS_TEST:
 715                 if (!ops->self_test_count)
 716                         return -EOPNOTSUPP;
 717                 gstrings.len = ops->self_test_count(dev);
 718                 break;
 719         case ETH_SS_STATS:
 720                 if (!ops->get_stats_count)
 721                         return -EOPNOTSUPP;
 722                 gstrings.len = ops->get_stats_count(dev);
 723                 break;
 724         default:
 725                 return -EINVAL;
 726         }
 727
 728         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 729         if (!data)
 730                 return -ENOMEM;
 731
 732         ops->get_strings(dev, gstrings.string_set, data);
 733
 734         ret = -EFAULT;
 735         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 736                 goto out;
 737         useraddr += sizeof(gstrings);
 738         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 739                 goto out;
 740         ret = 0;
 741
 742  out:
 743         kfree(data);
 744         return ret;
 745 }
 746
 747 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 748 {
 749         struct ethtool_value id;
 750
 751         if (!dev->ethtool_ops->phys_id)
 752                 return -EOPNOTSUPP;
 753
 754         if (copy_from_user(&id, useraddr, sizeof(id)))
 755                 return -EFAULT;
 756
 757         return dev->ethtool_ops->phys_id(dev, id.data);
 758 }
 759
 760 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 761 {
 762         struct ethtool_stats stats;
 763         const struct ethtool_ops *ops = dev->ethtool_ops;
 764         u64 *data;
 765         int ret;
 766
 767         if (!ops->get_ethtool_stats || !ops->get_stats_count)
 768                 return -EOPNOTSUPP;
 769
 770         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 771                 return -EFAULT;
 772
 773         stats.n_stats = ops->get_stats_count(dev);
 774         data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
 775         if (!data)
 776                 return -ENOMEM;
 777
 778         ops->get_ethtool_stats(dev, &stats, data);
 779
 780         ret = -EFAULT;
 781         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 782                 goto out;
 783         useraddr += sizeof(stats);
 784         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 785                 goto out;
 786         ret = 0;
 787
 788  out:
 789         kfree(data);
 790         return ret;
 791 }
 792
 793 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 794 {
 795         struct ethtool_perm_addr epaddr;
 796
 797         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
 798                 return -EFAULT;
 799
 800         if (epaddr.size < dev->addr_len)
 801                 return -ETOOSMALL;
 802         epaddr.size = dev->addr_len;
 803
 804         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 805                 return -EFAULT;
 806         useraddr += sizeof(epaddr);
 807         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
 808                 return -EFAULT;
 809         return 0;
 810 }
 811
 812 static int ethtool_get_flags(struct net_device *dev, char __user *useraddr)
 813 {
 814         struct ethtool_value edata = { ETHTOOL_GFLAGS };
 815
 816         if (!dev->ethtool_ops->get_flags)
 817                 return -EOPNOTSUPP;
 818
 819         edata.data = dev->ethtool_ops->get_flags(dev);
 820
 821         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 822                 return -EFAULT;
 823         return 0;
 824 }
 825
 826 static int ethtool_set_flags(struct net_device *dev, char __user *useraddr)
 827 {
 828         struct ethtool_value edata;
 829
 830         if (!dev->ethtool_ops->set_flags)
 831                 return -EOPNOTSUPP;
 832
 833         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 834                 return -EFAULT;
 835
 836         return dev->ethtool_ops->set_flags(dev, edata.data);
 837 }
 838
 839 /* The main entry point in this file.  Called from net/core/dev.c */
 840
 841 int dev_ethtool(struct ifreq *ifr)
 842 {
 843         struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
 844         void __user *useraddr = ifr->ifr_data;
 845         u32 ethcmd;
 846         int rc;
 847         unsigned long old_features;
 848
 849         if (!dev || !netif_device_present(dev))
 850                 return -ENODEV;
 851
 852         if (!dev->ethtool_ops)
 853                 return -EOPNOTSUPP;
 854
 855         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 856                 return -EFAULT;
 857
 858         /* Allow some commands to be done by anyone */
 859         switch(ethcmd) {
 860         case ETHTOOL_GDRVINFO:
 861         case ETHTOOL_GMSGLVL:
 862         case ETHTOOL_GCOALESCE:
 863         case ETHTOOL_GRINGPARAM:
 864         case ETHTOOL_GPAUSEPARAM:
 865         case ETHTOOL_GRXCSUM:
 866         case ETHTOOL_GTXCSUM:
 867         case ETHTOOL_GSG:
 868         case ETHTOOL_GSTRINGS:
 869         case ETHTOOL_GTSO:
 870         case ETHTOOL_GPERMADDR:
 871         case ETHTOOL_GUFO:
 872         case ETHTOOL_GGSO:
 873                 break;
 874         default:
 875                 if (!capable(CAP_NET_ADMIN))
 876                         return -EPERM;
 877         }
 878
 879         if (dev->ethtool_ops->begin)
 880                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 881                         return rc;
 882
 883         old_features = dev->features;
 884
 885         switch (ethcmd) {
 886         case ETHTOOL_GSET:
 887                 rc = ethtool_get_settings(dev, useraddr);
 888                 break;
 889         case ETHTOOL_SSET:
 890                 rc = ethtool_set_settings(dev, useraddr);
 891                 break;
 892         case ETHTOOL_GDRVINFO:
 893                 rc = ethtool_get_drvinfo(dev, useraddr);
 894                 break;
 895         case ETHTOOL_GREGS:
 896                 rc = ethtool_get_regs(dev, useraddr);
 897                 break;
 898         case ETHTOOL_GWOL:
 899                 rc = ethtool_get_wol(dev, useraddr);
 900                 break;
 901         case ETHTOOL_SWOL:
 902                 rc = ethtool_set_wol(dev, useraddr);
 903                 break;
 904         case ETHTOOL_GMSGLVL:
 905                 rc = ethtool_get_msglevel(dev, useraddr);
 906                 break;
 907         case ETHTOOL_SMSGLVL:
 908                 rc = ethtool_set_msglevel(dev, useraddr);
 909                 break;
 910         case ETHTOOL_NWAY_RST:
 911                 rc = ethtool_nway_reset(dev);
 912                 break;
 913         case ETHTOOL_GLINK:
 914                 rc = ethtool_get_link(dev, useraddr);
 915                 break;
 916         case ETHTOOL_GEEPROM:
 917                 rc = ethtool_get_eeprom(dev, useraddr);
 918                 break;
 919         case ETHTOOL_SEEPROM:
 920                 rc = ethtool_set_eeprom(dev, useraddr);
 921                 break;
 922         case ETHTOOL_GCOALESCE:
 923                 rc = ethtool_get_coalesce(dev, useraddr);
 924                 break;
 925         case ETHTOOL_SCOALESCE:
 926                 rc = ethtool_set_coalesce(dev, useraddr);
 927                 break;
 928         case ETHTOOL_GRINGPARAM:
 929                 rc = ethtool_get_ringparam(dev, useraddr);
 930                 break;
 931         case ETHTOOL_SRINGPARAM:
 932                 rc = ethtool_set_ringparam(dev, useraddr);
 933                 break;
 934         case ETHTOOL_GPAUSEPARAM:
 935                 rc = ethtool_get_pauseparam(dev, useraddr);
 936                 break;
 937         case ETHTOOL_SPAUSEPARAM:
 938                 rc = ethtool_set_pauseparam(dev, useraddr);
 939                 break;
 940         case ETHTOOL_GRXCSUM:
 941                 rc = ethtool_get_rx_csum(dev, useraddr);
 942                 break;
 943         case ETHTOOL_SRXCSUM:
 944                 rc = ethtool_set_rx_csum(dev, useraddr);
 945                 break;
 946         case ETHTOOL_GTXCSUM:
 947                 rc = ethtool_get_tx_csum(dev, useraddr);
 948                 break;
 949         case ETHTOOL_STXCSUM:
 950                 rc = ethtool_set_tx_csum(dev, useraddr);
 951                 break;
 952         case ETHTOOL_GSG:
 953                 rc = ethtool_get_sg(dev, useraddr);
 954                 break;
 955         case ETHTOOL_SSG:
 956                 rc = ethtool_set_sg(dev, useraddr);
 957                 break;
 958         case ETHTOOL_GTSO:
 959                 rc = ethtool_get_tso(dev, useraddr);
 960                 break;
 961         case ETHTOOL_STSO:
 962                 rc = ethtool_set_tso(dev, useraddr);
 963                 break;
 964         case ETHTOOL_TEST:
 965                 rc = ethtool_self_test(dev, useraddr);
 966                 break;
 967         case ETHTOOL_GSTRINGS:
 968                 rc = ethtool_get_strings(dev, useraddr);
 969                 break;
 970         case ETHTOOL_PHYS_ID:
 971                 rc = ethtool_phys_id(dev, useraddr);
 972                 break;
 973         case ETHTOOL_GSTATS:
 974                 rc = ethtool_get_stats(dev, useraddr);
 975                 break;
 976         case ETHTOOL_GPERMADDR:
 977                 rc = ethtool_get_perm_addr(dev, useraddr);
 978                 break;
 979         case ETHTOOL_GUFO:
 980                 rc = ethtool_get_ufo(dev, useraddr);
 981                 break;
 982         case ETHTOOL_SUFO:
 983                 rc = ethtool_set_ufo(dev, useraddr);
 984                 break;
 985         case ETHTOOL_GGSO:
 986                 rc = ethtool_get_gso(dev, useraddr);
 987                 break;
 988         case ETHTOOL_SGSO:
 989                 rc = ethtool_set_gso(dev, useraddr);
 990                 break;
 991         case ETHTOOL_GFLAGS:
 992                 rc = ethtool_get_flags(dev, useraddr);
 993                 break;
 994         case ETHTOOL_SFLAGS:
 995                 rc = ethtool_set_flags(dev, useraddr);
 996                 break;
 997         default:
 998                 rc = -EOPNOTSUPP;
 999         }
1000
1001         if (dev->ethtool_ops->complete)
1002                 dev->ethtool_ops->complete(dev);
1003
1004         if (old_features != dev->features)
1005                 netdev_features_change(dev);
1006
1007         return rc;
1008 }
1009
1010 EXPORT_SYMBOL(ethtool_op_get_link);
1011 EXPORT_SYMBOL(ethtool_op_get_sg);
1012 EXPORT_SYMBOL(ethtool_op_get_tso);
1013 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
1014 EXPORT_SYMBOL(ethtool_op_set_sg);
1015 EXPORT_SYMBOL(ethtool_op_set_tso);
1016 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1017 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
1018 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
1019 EXPORT_SYMBOL(ethtool_op_set_ufo);
1020 EXPORT_SYMBOL(ethtool_op_get_ufo);
1021 EXPORT_SYMBOL(ethtool_op_set_flags);
1022 EXPORT_SYMBOL(ethtool_op_get_flags);