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