net/core/ethtool.c

   1 /*
   2  * net/core/ethtool.c - Ethtool ioctl handler
   3  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   4  *
   5  * This file is where we call all the ethtool_ops commands to get
   6  * the information ethtool needs.  We fall back to calling do_ioctl()
   7  * for drivers which haven't been converted to ethtool_ops yet.
   8  *
   9  * It's GPL, stupid.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/types.h>
  14 #include <linux/capability.h>
  15 #include <linux/errno.h>
  16 #include <linux/ethtool.h>
  17 #include <linux/netdevice.h>
  18 #include <asm/uaccess.h>
  19
  20 /*
  21  * Some useful ethtool_ops methods that're device independent.
  22  * If we find that all drivers want to do the same thing here,
  23  * we can turn these into dev_() function calls.
  24  */
  25
  26 u32 ethtool_op_get_link(struct net_device *dev)
  27 {
  28         return netif_carrier_ok(dev) ? 1 : 0;
  29 }
  30
  31 u32 ethtool_op_get_tx_csum(struct net_device *dev)
  32 {
  33         return (dev->features & NETIF_F_ALL_CSUM) != 0;
  34 }
  35
  36 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
  37 {
  38         if (data)
  39                 dev->features |= NETIF_F_IP_CSUM;
  40         else
  41                 dev->features &= ~NETIF_F_IP_CSUM;
  42
  43         return 0;
  44 }
  45
  46 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
  47 {
  48         if (data)
  49                 dev->features |= NETIF_F_HW_CSUM;
  50         else
  51                 dev->features &= ~NETIF_F_HW_CSUM;
  52
  53         return 0;
  54 }
  55
  56 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
  57 {
  58         if (data)
  59                 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
  60         else
  61                 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
  62
  63         return 0;
  64 }
  65
  66 u32 ethtool_op_get_sg(struct net_device *dev)
  67 {
  68         return (dev->features & NETIF_F_SG) != 0;
  69 }
  70
  71 int ethtool_op_set_sg(struct net_device *dev, u32 data)
  72 {
  73         if (data)
  74                 dev->features |= NETIF_F_SG;
  75         else
  76                 dev->features &= ~NETIF_F_SG;
  77
  78         return 0;
  79 }
  80
  81 u32 ethtool_op_get_tso(struct net_device *dev)
  82 {
  83         return (dev->features & NETIF_F_TSO) != 0;
  84 }
  85
  86 int ethtool_op_set_tso(struct net_device *dev, u32 data)
  87 {
  88         if (data)
  89                 dev->features |= NETIF_F_TSO;
  90         else
  91                 dev->features &= ~NETIF_F_TSO;
  92
  93         return 0;
  94 }
  95
  96 int ethtool_op_get_perm_addr(struct net_device *dev, struct ethtool_perm_addr *addr, u8 *data)
  97 {
  98         unsigned char len = dev->addr_len;
  99         if ( addr->size < len )
 100                 return -ETOOSMALL;
 101
 102         addr->size = len;
 103         memcpy(data, dev->perm_addr, len);
 104         return 0;
 105 }
 106
 107
 108 u32 ethtool_op_get_ufo(struct net_device *dev)
 109 {
 110         return (dev->features & NETIF_F_UFO) != 0;
 111 }
 112
 113 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
 114 {
 115         if (data)
 116                 dev->features |= NETIF_F_UFO;
 117         else
 118                 dev->features &= ~NETIF_F_UFO;
 119         return 0;
 120 }
 121
 122 /* Handlers for each ethtool command */
 123
 124 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 125 {
 126         struct ethtool_cmd cmd = { ETHTOOL_GSET };
 127         int err;
 128
 129         if (!dev->ethtool_ops->get_settings)
 130                 return -EOPNOTSUPP;
 131
 132         err = dev->ethtool_ops->get_settings(dev, &cmd);
 133         if (err < 0)
 134                 return err;
 135
 136         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 137                 return -EFAULT;
 138         return 0;
 139 }
 140
 141 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 142 {
 143         struct ethtool_cmd cmd;
 144
 145         if (!dev->ethtool_ops->set_settings)
 146                 return -EOPNOTSUPP;
 147
 148         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 149                 return -EFAULT;
 150
 151         return dev->ethtool_ops->set_settings(dev, &cmd);
 152 }
 153
 154 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
 155 {
 156         struct ethtool_drvinfo info;
 157         const struct ethtool_ops *ops = dev->ethtool_ops;
 158
 159         if (!ops->get_drvinfo)
 160                 return -EOPNOTSUPP;
 161
 162         memset(&info, 0, sizeof(info));
 163         info.cmd = ETHTOOL_GDRVINFO;
 164         ops->get_drvinfo(dev, &info);
 165
 166         if (ops->self_test_count)
 167                 info.testinfo_len = ops->self_test_count(dev);
 168         if (ops->get_stats_count)
 169                 info.n_stats = ops->get_stats_count(dev);
 170         if (ops->get_regs_len)
 171                 info.regdump_len = ops->get_regs_len(dev);
 172         if (ops->get_eeprom_len)
 173                 info.eedump_len = ops->get_eeprom_len(dev);
 174
 175         if (copy_to_user(useraddr, &info, sizeof(info)))
 176                 return -EFAULT;
 177         return 0;
 178 }
 179
 180 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 181 {
 182         struct ethtool_regs regs;
 183         const struct ethtool_ops *ops = dev->ethtool_ops;
 184         void *regbuf;
 185         int reglen, ret;
 186
 187         if (!ops->get_regs || !ops->get_regs_len)
 188                 return -EOPNOTSUPP;
 189
 190         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 191                 return -EFAULT;
 192
 193         reglen = ops->get_regs_len(dev);
 194         if (regs.len > reglen)
 195                 regs.len = reglen;
 196
 197         regbuf = kmalloc(reglen, GFP_USER);
 198         if (!regbuf)
 199                 return -ENOMEM;
 200
 201         ops->get_regs(dev, &regs, regbuf);
 202
 203         ret = -EFAULT;
 204         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 205                 goto out;
 206         useraddr += offsetof(struct ethtool_regs, data);
 207         if (copy_to_user(useraddr, regbuf, regs.len))
 208                 goto out;
 209         ret = 0;
 210
 211  out:
 212         kfree(regbuf);
 213         return ret;
 214 }
 215
 216 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 217 {
 218         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 219
 220         if (!dev->ethtool_ops->get_wol)
 221                 return -EOPNOTSUPP;
 222
 223         dev->ethtool_ops->get_wol(dev, &wol);
 224
 225         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 226                 return -EFAULT;
 227         return 0;
 228 }
 229
 230 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 231 {
 232         struct ethtool_wolinfo wol;
 233
 234         if (!dev->ethtool_ops->set_wol)
 235                 return -EOPNOTSUPP;
 236
 237         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 238                 return -EFAULT;
 239
 240         return dev->ethtool_ops->set_wol(dev, &wol);
 241 }
 242
 243 static int ethtool_get_msglevel(struct net_device *dev, char __user *useraddr)
 244 {
 245         struct ethtool_value edata = { ETHTOOL_GMSGLVL };
 246
 247         if (!dev->ethtool_ops->get_msglevel)
 248                 return -EOPNOTSUPP;
 249
 250         edata.data = dev->ethtool_ops->get_msglevel(dev);
 251
 252         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 253                 return -EFAULT;
 254         return 0;
 255 }
 256
 257 static int ethtool_set_msglevel(struct net_device *dev, char __user *useraddr)
 258 {
 259         struct ethtool_value edata;
 260
 261         if (!dev->ethtool_ops->set_msglevel)
 262                 return -EOPNOTSUPP;
 263
 264         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 265                 return -EFAULT;
 266
 267         dev->ethtool_ops->set_msglevel(dev, edata.data);
 268         return 0;
 269 }
 270
 271 static int ethtool_nway_reset(struct net_device *dev)
 272 {
 273         if (!dev->ethtool_ops->nway_reset)
 274                 return -EOPNOTSUPP;
 275
 276         return dev->ethtool_ops->nway_reset(dev);
 277 }
 278
 279 static int ethtool_get_link(struct net_device *dev, void __user *useraddr)
 280 {
 281         struct ethtool_value edata = { ETHTOOL_GLINK };
 282
 283         if (!dev->ethtool_ops->get_link)
 284                 return -EOPNOTSUPP;
 285
 286         edata.data = dev->ethtool_ops->get_link(dev);
 287
 288         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 289                 return -EFAULT;
 290         return 0;
 291 }
 292
 293 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 294 {
 295         struct ethtool_eeprom eeprom;
 296         const struct ethtool_ops *ops = dev->ethtool_ops;
 297         u8 *data;
 298         int ret;
 299
 300         if (!ops->get_eeprom || !ops->get_eeprom_len)
 301                 return -EOPNOTSUPP;
 302
 303         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 304                 return -EFAULT;
 305
 306         /* Check for wrap and zero */
 307         if (eeprom.offset + eeprom.len <= eeprom.offset)
 308                 return -EINVAL;
 309
 310         /* Check for exceeding total eeprom len */
 311         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 312                 return -EINVAL;
 313
 314         data = kmalloc(eeprom.len, GFP_USER);
 315         if (!data)
 316                 return -ENOMEM;
 317
 318         ret = -EFAULT;
 319         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 320                 goto out;
 321
 322         ret = ops->get_eeprom(dev, &eeprom, data);
 323         if (ret)
 324                 goto out;
 325
 326         ret = -EFAULT;
 327         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 328                 goto out;
 329         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 330                 goto out;
 331         ret = 0;
 332
 333  out:
 334         kfree(data);
 335         return ret;
 336 }
 337
 338 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 339 {
 340         struct ethtool_eeprom eeprom;
 341         const struct ethtool_ops *ops = dev->ethtool_ops;
 342         u8 *data;
 343         int ret;
 344
 345         if (!ops->set_eeprom || !ops->get_eeprom_len)
 346                 return -EOPNOTSUPP;
 347
 348         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 349                 return -EFAULT;
 350
 351         /* Check for wrap and zero */
 352         if (eeprom.offset + eeprom.len <= eeprom.offset)
 353                 return -EINVAL;
 354
 355         /* Check for exceeding total eeprom len */
 356         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 357                 return -EINVAL;
 358
 359         data = kmalloc(eeprom.len, GFP_USER);
 360         if (!data)
 361                 return -ENOMEM;
 362
 363         ret = -EFAULT;
 364         if (copy_from_user(data, useraddr + sizeof(eeprom), eeprom.len))
 365                 goto out;
 366
 367         ret = ops->set_eeprom(dev, &eeprom, data);
 368         if (ret)
 369                 goto out;
 370
 371         if (copy_to_user(useraddr + sizeof(eeprom), data, eeprom.len))
 372                 ret = -EFAULT;
 373
 374  out:
 375         kfree(data);
 376         return ret;
 377 }
 378
 379 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 380 {
 381         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 382
 383         if (!dev->ethtool_ops->get_coalesce)
 384                 return -EOPNOTSUPP;
 385
 386         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 387
 388         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 389                 return -EFAULT;
 390         return 0;
 391 }
 392
 393 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 394 {
 395         struct ethtool_coalesce coalesce;
 396
 397         if (!dev->ethtool_ops->set_coalesce)
 398                 return -EOPNOTSUPP;
 399
 400         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 401                 return -EFAULT;
 402
 403         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 404 }
 405
 406 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 407 {
 408         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 409
 410         if (!dev->ethtool_ops->get_ringparam)
 411                 return -EOPNOTSUPP;
 412
 413         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 414
 415         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 416                 return -EFAULT;
 417         return 0;
 418 }
 419
 420 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 421 {
 422         struct ethtool_ringparam ringparam;
 423
 424         if (!dev->ethtool_ops->set_ringparam)
 425                 return -EOPNOTSUPP;
 426
 427         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 428                 return -EFAULT;
 429
 430         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 431 }
 432
 433 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 434 {
 435         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 436
 437         if (!dev->ethtool_ops->get_pauseparam)
 438                 return -EOPNOTSUPP;
 439
 440         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 441
 442         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 443                 return -EFAULT;
 444         return 0;
 445 }
 446
 447 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 448 {
 449         struct ethtool_pauseparam pauseparam;
 450
 451         if (!dev->ethtool_ops->set_pauseparam)
 452                 return -EOPNOTSUPP;
 453
 454         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 455                 return -EFAULT;
 456
 457         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 458 }
 459
 460 static int ethtool_get_rx_csum(struct net_device *dev, char __user *useraddr)
 461 {
 462         struct ethtool_value edata = { ETHTOOL_GRXCSUM };
 463
 464         if (!dev->ethtool_ops->get_rx_csum)
 465                 return -EOPNOTSUPP;
 466
 467         edata.data = dev->ethtool_ops->get_rx_csum(dev);
 468
 469         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 470                 return -EFAULT;
 471         return 0;
 472 }
 473
 474 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
 475 {
 476         struct ethtool_value edata;
 477
 478         if (!dev->ethtool_ops->set_rx_csum)
 479                 return -EOPNOTSUPP;
 480
 481         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 482                 return -EFAULT;
 483
 484         dev->ethtool_ops->set_rx_csum(dev, edata.data);
 485         return 0;
 486 }
 487
 488 static int ethtool_get_tx_csum(struct net_device *dev, char __user *useraddr)
 489 {
 490         struct ethtool_value edata = { ETHTOOL_GTXCSUM };
 491
 492         if (!dev->ethtool_ops->get_tx_csum)
 493                 return -EOPNOTSUPP;
 494
 495         edata.data = dev->ethtool_ops->get_tx_csum(dev);
 496
 497         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 498                 return -EFAULT;
 499         return 0;
 500 }
 501
 502 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 503 {
 504         int err;
 505
 506         if (!data && dev->ethtool_ops->set_tso) {
 507                 err = dev->ethtool_ops->set_tso(dev, 0);
 508                 if (err)
 509                         return err;
 510         }
 511
 512         if (!data && dev->ethtool_ops->set_ufo) {
 513                 err = dev->ethtool_ops->set_ufo(dev, 0);
 514                 if (err)
 515                         return err;
 516         }
 517         return dev->ethtool_ops->set_sg(dev, data);
 518 }
 519
 520 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 521 {
 522         struct ethtool_value edata;
 523         int err;
 524
 525         if (!dev->ethtool_ops->set_tx_csum)
 526                 return -EOPNOTSUPP;
 527
 528         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 529                 return -EFAULT;
 530
 531         if (!edata.data && dev->ethtool_ops->set_sg) {
 532                 err = __ethtool_set_sg(dev, 0);
 533                 if (err)
 534                         return err;
 535         }
 536
 537         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 538 }
 539
 540 static int ethtool_get_sg(struct net_device *dev, char __user *useraddr)
 541 {
 542         struct ethtool_value edata = { ETHTOOL_GSG };
 543
 544         if (!dev->ethtool_ops->get_sg)
 545                 return -EOPNOTSUPP;
 546
 547         edata.data = dev->ethtool_ops->get_sg(dev);
 548
 549         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 550                 return -EFAULT;
 551         return 0;
 552 }
 553
 554 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 555 {
 556         struct ethtool_value edata;
 557
 558         if (!dev->ethtool_ops->set_sg)
 559                 return -EOPNOTSUPP;
 560
 561         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 562                 return -EFAULT;
 563
 564         if (edata.data &&
 565             !(dev->features & NETIF_F_ALL_CSUM))
 566                 return -EINVAL;
 567
 568         return __ethtool_set_sg(dev, edata.data);
 569 }
 570
 571 static int ethtool_get_tso(struct net_device *dev, char __user *useraddr)
 572 {
 573         struct ethtool_value edata = { ETHTOOL_GTSO };
 574
 575         if (!dev->ethtool_ops->get_tso)
 576                 return -EOPNOTSUPP;
 577
 578         edata.data = dev->ethtool_ops->get_tso(dev);
 579
 580         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 581                 return -EFAULT;
 582         return 0;
 583 }
 584
 585 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 586 {
 587         struct ethtool_value edata;
 588
 589         if (!dev->ethtool_ops->set_tso)
 590                 return -EOPNOTSUPP;
 591
 592         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 593                 return -EFAULT;
 594
 595         if (edata.data && !(dev->features & NETIF_F_SG))
 596                 return -EINVAL;
 597
 598         return dev->ethtool_ops->set_tso(dev, edata.data);
 599 }
 600
 601 static int ethtool_get_ufo(struct net_device *dev, char __user *useraddr)
 602 {
 603         struct ethtool_value edata = { ETHTOOL_GUFO };
 604
 605         if (!dev->ethtool_ops->get_ufo)
 606                 return -EOPNOTSUPP;
 607         edata.data = dev->ethtool_ops->get_ufo(dev);
 608         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 609                  return -EFAULT;
 610         return 0;
 611 }
 612
 613 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 614 {
 615         struct ethtool_value edata;
 616
 617         if (!dev->ethtool_ops->set_ufo)
 618                 return -EOPNOTSUPP;
 619         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 620                 return -EFAULT;
 621         if (edata.data && !(dev->features & NETIF_F_SG))
 622                 return -EINVAL;
 623         if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 624                 return -EINVAL;
 625         return dev->ethtool_ops->set_ufo(dev, edata.data);
 626 }
 627
 628 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 629 {
 630         struct ethtool_value edata = { ETHTOOL_GGSO };
 631
 632         edata.data = dev->features & NETIF_F_GSO;
 633         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 634                  return -EFAULT;
 635         return 0;
 636 }
 637
 638 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 639 {
 640         struct ethtool_value edata;
 641
 642         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 643                 return -EFAULT;
 644         if (edata.data)
 645                 dev->features |= NETIF_F_GSO;
 646         else
 647                 dev->features &= ~NETIF_F_GSO;
 648         return 0;
 649 }
 650
 651 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 652 {
 653         struct ethtool_test test;
 654         const struct ethtool_ops *ops = dev->ethtool_ops;
 655         u64 *data;
 656         int ret;
 657
 658         if (!ops->self_test || !ops->self_test_count)
 659                 return -EOPNOTSUPP;
 660
 661         if (copy_from_user(&test, useraddr, sizeof(test)))
 662                 return -EFAULT;
 663
 664         test.len = ops->self_test_count(dev);
 665         data = kmalloc(test.len * sizeof(u64), GFP_USER);
 666         if (!data)
 667                 return -ENOMEM;
 668
 669         ops->self_test(dev, &test, data);
 670
 671         ret = -EFAULT;
 672         if (copy_to_user(useraddr, &test, sizeof(test)))
 673                 goto out;
 674         useraddr += sizeof(test);
 675         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 676                 goto out;
 677         ret = 0;
 678
 679  out:
 680         kfree(data);
 681         return ret;
 682 }
 683
 684 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 685 {
 686         struct ethtool_gstrings gstrings;
 687         const struct ethtool_ops *ops = dev->ethtool_ops;
 688         u8 *data;
 689         int ret;
 690
 691         if (!ops->get_strings)
 692                 return -EOPNOTSUPP;
 693
 694         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 695                 return -EFAULT;
 696
 697         switch (gstrings.string_set) {
 698         case ETH_SS_TEST:
 699                 if (!ops->self_test_count)
 700                         return -EOPNOTSUPP;
 701                 gstrings.len = ops->self_test_count(dev);
 702                 break;
 703         case ETH_SS_STATS:
 704                 if (!ops->get_stats_count)
 705                         return -EOPNOTSUPP;
 706                 gstrings.len = ops->get_stats_count(dev);
 707                 break;
 708         default:
 709                 return -EINVAL;
 710         }
 711
 712         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 713         if (!data)
 714                 return -ENOMEM;
 715
 716         ops->get_strings(dev, gstrings.string_set, data);
 717
 718         ret = -EFAULT;
 719         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 720                 goto out;
 721         useraddr += sizeof(gstrings);
 722         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 723                 goto out;
 724         ret = 0;
 725
 726  out:
 727         kfree(data);
 728         return ret;
 729 }
 730
 731 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 732 {
 733         struct ethtool_value id;
 734
 735         if (!dev->ethtool_ops->phys_id)
 736                 return -EOPNOTSUPP;
 737
 738         if (copy_from_user(&id, useraddr, sizeof(id)))
 739                 return -EFAULT;
 740
 741         return dev->ethtool_ops->phys_id(dev, id.data);
 742 }
 743
 744 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 745 {
 746         struct ethtool_stats stats;
 747         const struct ethtool_ops *ops = dev->ethtool_ops;
 748         u64 *data;
 749         int ret;
 750
 751         if (!ops->get_ethtool_stats || !ops->get_stats_count)
 752                 return -EOPNOTSUPP;
 753
 754         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 755                 return -EFAULT;
 756
 757         stats.n_stats = ops->get_stats_count(dev);
 758         data = kmalloc(stats.n_stats * sizeof(u64), GFP_USER);
 759         if (!data)
 760                 return -ENOMEM;
 761
 762         ops->get_ethtool_stats(dev, &stats, data);
 763
 764         ret = -EFAULT;
 765         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 766                 goto out;
 767         useraddr += sizeof(stats);
 768         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 769                 goto out;
 770         ret = 0;
 771
 772  out:
 773         kfree(data);
 774         return ret;
 775 }
 776
 777 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 778 {
 779         struct ethtool_perm_addr epaddr;
 780         u8 *data;
 781         int ret;
 782
 783         if (!dev->ethtool_ops->get_perm_addr)
 784                 return -EOPNOTSUPP;
 785
 786         if (copy_from_user(&epaddr,useraddr,sizeof(epaddr)))
 787                 return -EFAULT;
 788
 789         data = kmalloc(epaddr.size, GFP_USER);
 790         if (!data)
 791                 return -ENOMEM;
 792
 793         ret = dev->ethtool_ops->get_perm_addr(dev,&epaddr,data);
 794         if (ret)
 795                 return ret;
 796
 797         ret = -EFAULT;
 798         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 799                 goto out;
 800         useraddr += sizeof(epaddr);
 801         if (copy_to_user(useraddr, data, epaddr.size))
 802                 goto out;
 803         ret = 0;
 804
 805  out:
 806         kfree(data);
 807         return ret;
 808 }
 809
 810 /* The main entry point in this file.  Called from net/core/dev.c */
 811
 812 int dev_ethtool(struct ifreq *ifr)
 813 {
 814         struct net_device *dev = __dev_get_by_name(ifr->ifr_name);
 815         void __user *useraddr = ifr->ifr_data;
 816         u32 ethcmd;
 817         int rc;
 818         unsigned long old_features;
 819
 820         if (!dev || !netif_device_present(dev))
 821                 return -ENODEV;
 822
 823         if (!dev->ethtool_ops)
 824                 goto ioctl;
 825
 826         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 827                 return -EFAULT;
 828
 829         /* Allow some commands to be done by anyone */
 830         switch(ethcmd) {
 831         case ETHTOOL_GDRVINFO:
 832         case ETHTOOL_GMSGLVL:
 833         case ETHTOOL_GCOALESCE:
 834         case ETHTOOL_GRINGPARAM:
 835         case ETHTOOL_GPAUSEPARAM:
 836         case ETHTOOL_GRXCSUM:
 837         case ETHTOOL_GTXCSUM:
 838         case ETHTOOL_GSG:
 839         case ETHTOOL_GSTRINGS:
 840         case ETHTOOL_GTSO:
 841         case ETHTOOL_GPERMADDR:
 842         case ETHTOOL_GUFO:
 843         case ETHTOOL_GGSO:
 844                 break;
 845         default:
 846                 if (!capable(CAP_NET_ADMIN))
 847                         return -EPERM;
 848         }
 849
 850         if (dev->ethtool_ops->begin)
 851                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 852                         return rc;
 853
 854         old_features = dev->features;
 855
 856         switch (ethcmd) {
 857         case ETHTOOL_GSET:
 858                 rc = ethtool_get_settings(dev, useraddr);
 859                 break;
 860         case ETHTOOL_SSET:
 861                 rc = ethtool_set_settings(dev, useraddr);
 862                 break;
 863         case ETHTOOL_GDRVINFO:
 864                 rc = ethtool_get_drvinfo(dev, useraddr);
 865                 break;
 866         case ETHTOOL_GREGS:
 867                 rc = ethtool_get_regs(dev, useraddr);
 868                 break;
 869         case ETHTOOL_GWOL:
 870                 rc = ethtool_get_wol(dev, useraddr);
 871                 break;
 872         case ETHTOOL_SWOL:
 873                 rc = ethtool_set_wol(dev, useraddr);
 874                 break;
 875         case ETHTOOL_GMSGLVL:
 876                 rc = ethtool_get_msglevel(dev, useraddr);
 877                 break;
 878         case ETHTOOL_SMSGLVL:
 879                 rc = ethtool_set_msglevel(dev, useraddr);
 880                 break;
 881         case ETHTOOL_NWAY_RST:
 882                 rc = ethtool_nway_reset(dev);
 883                 break;
 884         case ETHTOOL_GLINK:
 885                 rc = ethtool_get_link(dev, useraddr);
 886                 break;
 887         case ETHTOOL_GEEPROM:
 888                 rc = ethtool_get_eeprom(dev, useraddr);
 889                 break;
 890         case ETHTOOL_SEEPROM:
 891                 rc = ethtool_set_eeprom(dev, useraddr);
 892                 break;
 893         case ETHTOOL_GCOALESCE:
 894                 rc = ethtool_get_coalesce(dev, useraddr);
 895                 break;
 896         case ETHTOOL_SCOALESCE:
 897                 rc = ethtool_set_coalesce(dev, useraddr);
 898                 break;
 899         case ETHTOOL_GRINGPARAM:
 900                 rc = ethtool_get_ringparam(dev, useraddr);
 901                 break;
 902         case ETHTOOL_SRINGPARAM:
 903                 rc = ethtool_set_ringparam(dev, useraddr);
 904                 break;
 905         case ETHTOOL_GPAUSEPARAM:
 906                 rc = ethtool_get_pauseparam(dev, useraddr);
 907                 break;
 908         case ETHTOOL_SPAUSEPARAM:
 909                 rc = ethtool_set_pauseparam(dev, useraddr);
 910                 break;
 911         case ETHTOOL_GRXCSUM:
 912                 rc = ethtool_get_rx_csum(dev, useraddr);
 913                 break;
 914         case ETHTOOL_SRXCSUM:
 915                 rc = ethtool_set_rx_csum(dev, useraddr);
 916                 break;
 917         case ETHTOOL_GTXCSUM:
 918                 rc = ethtool_get_tx_csum(dev, useraddr);
 919                 break;
 920         case ETHTOOL_STXCSUM:
 921                 rc = ethtool_set_tx_csum(dev, useraddr);
 922                 break;
 923         case ETHTOOL_GSG:
 924                 rc = ethtool_get_sg(dev, useraddr);
 925                 break;
 926         case ETHTOOL_SSG:
 927                 rc = ethtool_set_sg(dev, useraddr);
 928                 break;
 929         case ETHTOOL_GTSO:
 930                 rc = ethtool_get_tso(dev, useraddr);
 931                 break;
 932         case ETHTOOL_STSO:
 933                 rc = ethtool_set_tso(dev, useraddr);
 934                 break;
 935         case ETHTOOL_TEST:
 936                 rc = ethtool_self_test(dev, useraddr);
 937                 break;
 938         case ETHTOOL_GSTRINGS:
 939                 rc = ethtool_get_strings(dev, useraddr);
 940                 break;
 941         case ETHTOOL_PHYS_ID:
 942                 rc = ethtool_phys_id(dev, useraddr);
 943                 break;
 944         case ETHTOOL_GSTATS:
 945                 rc = ethtool_get_stats(dev, useraddr);
 946                 break;
 947         case ETHTOOL_GPERMADDR:
 948                 rc = ethtool_get_perm_addr(dev, useraddr);
 949                 break;
 950         case ETHTOOL_GUFO:
 951                 rc = ethtool_get_ufo(dev, useraddr);
 952                 break;
 953         case ETHTOOL_SUFO:
 954                 rc = ethtool_set_ufo(dev, useraddr);
 955                 break;
 956         case ETHTOOL_GGSO:
 957                 rc = ethtool_get_gso(dev, useraddr);
 958                 break;
 959         case ETHTOOL_SGSO:
 960                 rc = ethtool_set_gso(dev, useraddr);
 961                 break;
 962         default:
 963                 rc =  -EOPNOTSUPP;
 964         }
 965
 966         if (dev->ethtool_ops->complete)
 967                 dev->ethtool_ops->complete(dev);
 968
 969         if (old_features != dev->features)
 970                 netdev_features_change(dev);
 971
 972         return rc;
 973
 974  ioctl:
 975         /* Keep existing behaviour for the moment.       */
 976         if (!capable(CAP_NET_ADMIN))
 977                 return -EPERM;
 978
 979         if (dev->do_ioctl)
 980                 return dev->do_ioctl(dev, ifr, SIOCETHTOOL);
 981         return -EOPNOTSUPP;
 982 }
 983
 984 EXPORT_SYMBOL(dev_ethtool);
 985 EXPORT_SYMBOL(ethtool_op_get_link);
 986 EXPORT_SYMBOL_GPL(ethtool_op_get_perm_addr);
 987 EXPORT_SYMBOL(ethtool_op_get_sg);
 988 EXPORT_SYMBOL(ethtool_op_get_tso);
 989 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
 990 EXPORT_SYMBOL(ethtool_op_set_sg);
 991 EXPORT_SYMBOL(ethtool_op_set_tso);
 992 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
 993 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
 994 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
 995 EXPORT_SYMBOL(ethtool_op_set_ufo);
 996 EXPORT_SYMBOL(ethtool_op_get_ufo);