net/core/ethtool.c

   1 /*
   2  * net/core/ethtool.c - Ethtool ioctl handler
   3  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
   4  *
   5  * This file is where we call all the ethtool_ops commands to get
   6  * the information ethtool needs.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/types.h>
  16 #include <linux/capability.h>
  17 #include <linux/errno.h>
  18 #include <linux/ethtool.h>
  19 #include <linux/netdevice.h>
  20 #include <asm/uaccess.h>
  21
  22 /*
  23  * Some useful ethtool_ops methods that're device independent.
  24  * If we find that all drivers want to do the same thing here,
  25  * we can turn these into dev_() function calls.
  26  */
  27
  28 u32 ethtool_op_get_link(struct net_device *dev)
  29 {
  30         return netif_carrier_ok(dev) ? 1 : 0;
  31 }
  32
  33 u32 ethtool_op_get_tx_csum(struct net_device *dev)
  34 {
  35         return (dev->features & NETIF_F_ALL_CSUM) != 0;
  36 }
  37
  38 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
  39 {
  40         if (data)
  41                 dev->features |= NETIF_F_IP_CSUM;
  42         else
  43                 dev->features &= ~NETIF_F_IP_CSUM;
  44
  45         return 0;
  46 }
  47
  48 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
  49 {
  50         if (data)
  51                 dev->features |= NETIF_F_HW_CSUM;
  52         else
  53                 dev->features &= ~NETIF_F_HW_CSUM;
  54
  55         return 0;
  56 }
  57
  58 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
  59 {
  60         if (data)
  61                 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
  62         else
  63                 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
  64
  65         return 0;
  66 }
  67
  68 u32 ethtool_op_get_sg(struct net_device *dev)
  69 {
  70         return (dev->features & NETIF_F_SG) != 0;
  71 }
  72
  73 int ethtool_op_set_sg(struct net_device *dev, u32 data)
  74 {
  75         if (data)
  76                 dev->features |= NETIF_F_SG;
  77         else
  78                 dev->features &= ~NETIF_F_SG;
  79
  80         return 0;
  81 }
  82
  83 u32 ethtool_op_get_tso(struct net_device *dev)
  84 {
  85         return (dev->features & NETIF_F_TSO) != 0;
  86 }
  87
  88 int ethtool_op_set_tso(struct net_device *dev, u32 data)
  89 {
  90         if (data)
  91                 dev->features |= NETIF_F_TSO;
  92         else
  93                 dev->features &= ~NETIF_F_TSO;
  94
  95         return 0;
  96 }
  97
  98 u32 ethtool_op_get_ufo(struct net_device *dev)
  99 {
 100         return (dev->features & NETIF_F_UFO) != 0;
 101 }
 102
 103 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
 104 {
 105         if (data)
 106                 dev->features |= NETIF_F_UFO;
 107         else
 108                 dev->features &= ~NETIF_F_UFO;
 109         return 0;
 110 }
 111
 112 /* the following list of flags are the same as their associated
 113  * NETIF_F_xxx values in include/linux/netdevice.h
 114  */
 115 static const u32 flags_dup_features =
 116         ETH_FLAG_LRO;
 117
 118 u32 ethtool_op_get_flags(struct net_device *dev)
 119 {
 120         /* in the future, this function will probably contain additional
 121          * handling for flags which are not so easily handled
 122          * by a simple masking operation
 123          */
 124
 125         return dev->features & flags_dup_features;
 126 }
 127
 128 int ethtool_op_set_flags(struct net_device *dev, u32 data)
 129 {
 130         if (data & ETH_FLAG_LRO)
 131                 dev->features |= NETIF_F_LRO;
 132         else
 133                 dev->features &= ~NETIF_F_LRO;
 134
 135         return 0;
 136 }
 137
 138 /* Handlers for each ethtool command */
 139
 140 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 141 {
 142         struct ethtool_cmd cmd = { ETHTOOL_GSET };
 143         int err;
 144
 145         if (!dev->ethtool_ops->get_settings)
 146                 return -EOPNOTSUPP;
 147
 148         err = dev->ethtool_ops->get_settings(dev, &cmd);
 149         if (err < 0)
 150                 return err;
 151
 152         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 153                 return -EFAULT;
 154         return 0;
 155 }
 156
 157 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 158 {
 159         struct ethtool_cmd cmd;
 160
 161         if (!dev->ethtool_ops->set_settings)
 162                 return -EOPNOTSUPP;
 163
 164         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 165                 return -EFAULT;
 166
 167         return dev->ethtool_ops->set_settings(dev, &cmd);
 168 }
 169
 170 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
 171 {
 172         struct ethtool_drvinfo info;
 173         const struct ethtool_ops *ops = dev->ethtool_ops;
 174
 175         if (!ops->get_drvinfo)
 176                 return -EOPNOTSUPP;
 177
 178         memset(&info, 0, sizeof(info));
 179         info.cmd = ETHTOOL_GDRVINFO;
 180         ops->get_drvinfo(dev, &info);
 181
 182         if (ops->get_sset_count) {
 183                 int rc;
 184
 185                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 186                 if (rc >= 0)
 187                         info.testinfo_len = rc;
 188                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 189                 if (rc >= 0)
 190                         info.n_stats = rc;
 191                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 192                 if (rc >= 0)
 193                         info.n_priv_flags = rc;
 194         } else {
 195                 /* code path for obsolete hooks */
 196
 197                 if (ops->self_test_count)
 198                         info.testinfo_len = ops->self_test_count(dev);
 199                 if (ops->get_stats_count)
 200                         info.n_stats = ops->get_stats_count(dev);
 201         }
 202         if (ops->get_regs_len)
 203                 info.regdump_len = ops->get_regs_len(dev);
 204         if (ops->get_eeprom_len)
 205                 info.eedump_len = ops->get_eeprom_len(dev);
 206
 207         if (copy_to_user(useraddr, &info, sizeof(info)))
 208                 return -EFAULT;
 209         return 0;
 210 }
 211
 212 static int ethtool_set_rxhash(struct net_device *dev, void __user *useraddr)
 213 {
 214         struct ethtool_rxnfc cmd;
 215
 216         if (!dev->ethtool_ops->set_rxhash)
 217                 return -EOPNOTSUPP;
 218
 219         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 220                 return -EFAULT;
 221
 222         return dev->ethtool_ops->set_rxhash(dev, &cmd);
 223 }
 224
 225 static int ethtool_get_rxhash(struct net_device *dev, void __user *useraddr)
 226 {
 227         struct ethtool_rxnfc info;
 228
 229         if (!dev->ethtool_ops->get_rxhash)
 230                 return -EOPNOTSUPP;
 231
 232         if (copy_from_user(&info, useraddr, sizeof(info)))
 233                 return -EFAULT;
 234
 235         dev->ethtool_ops->get_rxhash(dev, &info);
 236
 237         if (copy_to_user(useraddr, &info, sizeof(info)))
 238                 return -EFAULT;
 239         return 0;
 240 }
 241
 242 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 243 {
 244         struct ethtool_regs regs;
 245         const struct ethtool_ops *ops = dev->ethtool_ops;
 246         void *regbuf;
 247         int reglen, ret;
 248
 249         if (!ops->get_regs || !ops->get_regs_len)
 250                 return -EOPNOTSUPP;
 251
 252         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 253                 return -EFAULT;
 254
 255         reglen = ops->get_regs_len(dev);
 256         if (regs.len > reglen)
 257                 regs.len = reglen;
 258
 259         regbuf = kmalloc(reglen, GFP_USER);
 260         if (!regbuf)
 261                 return -ENOMEM;
 262
 263         ops->get_regs(dev, &regs, regbuf);
 264
 265         ret = -EFAULT;
 266         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 267                 goto out;
 268         useraddr += offsetof(struct ethtool_regs, data);
 269         if (copy_to_user(useraddr, regbuf, regs.len))
 270                 goto out;
 271         ret = 0;
 272
 273  out:
 274         kfree(regbuf);
 275         return ret;
 276 }
 277
 278 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 279 {
 280         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 281
 282         if (!dev->ethtool_ops->get_wol)
 283                 return -EOPNOTSUPP;
 284
 285         dev->ethtool_ops->get_wol(dev, &wol);
 286
 287         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 288                 return -EFAULT;
 289         return 0;
 290 }
 291
 292 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 293 {
 294         struct ethtool_wolinfo wol;
 295
 296         if (!dev->ethtool_ops->set_wol)
 297                 return -EOPNOTSUPP;
 298
 299         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 300                 return -EFAULT;
 301
 302         return dev->ethtool_ops->set_wol(dev, &wol);
 303 }
 304
 305 static int ethtool_nway_reset(struct net_device *dev)
 306 {
 307         if (!dev->ethtool_ops->nway_reset)
 308                 return -EOPNOTSUPP;
 309
 310         return dev->ethtool_ops->nway_reset(dev);
 311 }
 312
 313 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 314 {
 315         struct ethtool_eeprom eeprom;
 316         const struct ethtool_ops *ops = dev->ethtool_ops;
 317         void __user *userbuf = useraddr + sizeof(eeprom);
 318         u32 bytes_remaining;
 319         u8 *data;
 320         int ret = 0;
 321
 322         if (!ops->get_eeprom || !ops->get_eeprom_len)
 323                 return -EOPNOTSUPP;
 324
 325         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 326                 return -EFAULT;
 327
 328         /* Check for wrap and zero */
 329         if (eeprom.offset + eeprom.len <= eeprom.offset)
 330                 return -EINVAL;
 331
 332         /* Check for exceeding total eeprom len */
 333         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 334                 return -EINVAL;
 335
 336         data = kmalloc(PAGE_SIZE, GFP_USER);
 337         if (!data)
 338                 return -ENOMEM;
 339
 340         bytes_remaining = eeprom.len;
 341         while (bytes_remaining > 0) {
 342                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
 343
 344                 ret = ops->get_eeprom(dev, &eeprom, data);
 345                 if (ret)
 346                         break;
 347                 if (copy_to_user(userbuf, data, eeprom.len)) {
 348                         ret = -EFAULT;
 349                         break;
 350                 }
 351                 userbuf += eeprom.len;
 352                 eeprom.offset += eeprom.len;
 353                 bytes_remaining -= eeprom.len;
 354         }
 355
 356         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
 357         eeprom.offset -= eeprom.len;
 358         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 359                 ret = -EFAULT;
 360
 361         kfree(data);
 362         return ret;
 363 }
 364
 365 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 366 {
 367         struct ethtool_eeprom eeprom;
 368         const struct ethtool_ops *ops = dev->ethtool_ops;
 369         void __user *userbuf = useraddr + sizeof(eeprom);
 370         u32 bytes_remaining;
 371         u8 *data;
 372         int ret = 0;
 373
 374         if (!ops->set_eeprom || !ops->get_eeprom_len)
 375                 return -EOPNOTSUPP;
 376
 377         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 378                 return -EFAULT;
 379
 380         /* Check for wrap and zero */
 381         if (eeprom.offset + eeprom.len <= eeprom.offset)
 382                 return -EINVAL;
 383
 384         /* Check for exceeding total eeprom len */
 385         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 386                 return -EINVAL;
 387
 388         data = kmalloc(PAGE_SIZE, GFP_USER);
 389         if (!data)
 390                 return -ENOMEM;
 391
 392         bytes_remaining = eeprom.len;
 393         while (bytes_remaining > 0) {
 394                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
 395
 396                 if (copy_from_user(data, userbuf, eeprom.len)) {
 397                         ret = -EFAULT;
 398                         break;
 399                 }
 400                 ret = ops->set_eeprom(dev, &eeprom, data);
 401                 if (ret)
 402                         break;
 403                 userbuf += eeprom.len;
 404                 eeprom.offset += eeprom.len;
 405                 bytes_remaining -= eeprom.len;
 406         }
 407
 408         kfree(data);
 409         return ret;
 410 }
 411
 412 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 413 {
 414         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 415
 416         if (!dev->ethtool_ops->get_coalesce)
 417                 return -EOPNOTSUPP;
 418
 419         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 420
 421         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 422                 return -EFAULT;
 423         return 0;
 424 }
 425
 426 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 427 {
 428         struct ethtool_coalesce coalesce;
 429
 430         if (!dev->ethtool_ops->set_coalesce)
 431                 return -EOPNOTSUPP;
 432
 433         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 434                 return -EFAULT;
 435
 436         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 437 }
 438
 439 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 440 {
 441         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 442
 443         if (!dev->ethtool_ops->get_ringparam)
 444                 return -EOPNOTSUPP;
 445
 446         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 447
 448         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 449                 return -EFAULT;
 450         return 0;
 451 }
 452
 453 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 454 {
 455         struct ethtool_ringparam ringparam;
 456
 457         if (!dev->ethtool_ops->set_ringparam)
 458                 return -EOPNOTSUPP;
 459
 460         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 461                 return -EFAULT;
 462
 463         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 464 }
 465
 466 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 467 {
 468         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 469
 470         if (!dev->ethtool_ops->get_pauseparam)
 471                 return -EOPNOTSUPP;
 472
 473         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 474
 475         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 476                 return -EFAULT;
 477         return 0;
 478 }
 479
 480 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 481 {
 482         struct ethtool_pauseparam pauseparam;
 483
 484         if (!dev->ethtool_ops->set_pauseparam)
 485                 return -EOPNOTSUPP;
 486
 487         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 488                 return -EFAULT;
 489
 490         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 491 }
 492
 493 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 494 {
 495         int err;
 496
 497         if (!data && dev->ethtool_ops->set_tso) {
 498                 err = dev->ethtool_ops->set_tso(dev, 0);
 499                 if (err)
 500                         return err;
 501         }
 502
 503         if (!data && dev->ethtool_ops->set_ufo) {
 504                 err = dev->ethtool_ops->set_ufo(dev, 0);
 505                 if (err)
 506                         return err;
 507         }
 508         return dev->ethtool_ops->set_sg(dev, data);
 509 }
 510
 511 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 512 {
 513         struct ethtool_value edata;
 514         int err;
 515
 516         if (!dev->ethtool_ops->set_tx_csum)
 517                 return -EOPNOTSUPP;
 518
 519         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 520                 return -EFAULT;
 521
 522         if (!edata.data && dev->ethtool_ops->set_sg) {
 523                 err = __ethtool_set_sg(dev, 0);
 524                 if (err)
 525                         return err;
 526         }
 527
 528         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 529 }
 530
 531 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 532 {
 533         struct ethtool_value edata;
 534
 535         if (!dev->ethtool_ops->set_sg)
 536                 return -EOPNOTSUPP;
 537
 538         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 539                 return -EFAULT;
 540
 541         if (edata.data &&
 542             !(dev->features & NETIF_F_ALL_CSUM))
 543                 return -EINVAL;
 544
 545         return __ethtool_set_sg(dev, edata.data);
 546 }
 547
 548 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 549 {
 550         struct ethtool_value edata;
 551
 552         if (!dev->ethtool_ops->set_tso)
 553                 return -EOPNOTSUPP;
 554
 555         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 556                 return -EFAULT;
 557
 558         if (edata.data && !(dev->features & NETIF_F_SG))
 559                 return -EINVAL;
 560
 561         return dev->ethtool_ops->set_tso(dev, edata.data);
 562 }
 563
 564 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 565 {
 566         struct ethtool_value edata;
 567
 568         if (!dev->ethtool_ops->set_ufo)
 569                 return -EOPNOTSUPP;
 570         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 571                 return -EFAULT;
 572         if (edata.data && !(dev->features & NETIF_F_SG))
 573                 return -EINVAL;
 574         if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 575                 return -EINVAL;
 576         return dev->ethtool_ops->set_ufo(dev, edata.data);
 577 }
 578
 579 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 580 {
 581         struct ethtool_value edata = { ETHTOOL_GGSO };
 582
 583         edata.data = dev->features & NETIF_F_GSO;
 584         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 585                  return -EFAULT;
 586         return 0;
 587 }
 588
 589 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 590 {
 591         struct ethtool_value edata;
 592
 593         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 594                 return -EFAULT;
 595         if (edata.data)
 596                 dev->features |= NETIF_F_GSO;
 597         else
 598                 dev->features &= ~NETIF_F_GSO;
 599         return 0;
 600 }
 601
 602 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 603 {
 604         struct ethtool_test test;
 605         const struct ethtool_ops *ops = dev->ethtool_ops;
 606         u64 *data;
 607         int ret, test_len;
 608
 609         if (!ops->self_test)
 610                 return -EOPNOTSUPP;
 611         if (!ops->get_sset_count && !ops->self_test_count)
 612                 return -EOPNOTSUPP;
 613
 614         if (ops->get_sset_count)
 615                 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
 616         else
 617                 /* code path for obsolete hook */
 618                 test_len = ops->self_test_count(dev);
 619         if (test_len < 0)
 620                 return test_len;
 621         WARN_ON(test_len == 0);
 622
 623         if (copy_from_user(&test, useraddr, sizeof(test)))
 624                 return -EFAULT;
 625
 626         test.len = test_len;
 627         data = kmalloc(test_len * sizeof(u64), GFP_USER);
 628         if (!data)
 629                 return -ENOMEM;
 630
 631         ops->self_test(dev, &test, data);
 632
 633         ret = -EFAULT;
 634         if (copy_to_user(useraddr, &test, sizeof(test)))
 635                 goto out;
 636         useraddr += sizeof(test);
 637         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 638                 goto out;
 639         ret = 0;
 640
 641  out:
 642         kfree(data);
 643         return ret;
 644 }
 645
 646 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 647 {
 648         struct ethtool_gstrings gstrings;
 649         const struct ethtool_ops *ops = dev->ethtool_ops;
 650         u8 *data;
 651         int ret;
 652
 653         if (!ops->get_strings)
 654                 return -EOPNOTSUPP;
 655
 656         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 657                 return -EFAULT;
 658
 659         if (ops->get_sset_count) {
 660                 ret = ops->get_sset_count(dev, gstrings.string_set);
 661                 if (ret < 0)
 662                         return ret;
 663
 664                 gstrings.len = ret;
 665         } else {
 666                 /* code path for obsolete hooks */
 667
 668                 switch (gstrings.string_set) {
 669                 case ETH_SS_TEST:
 670                         if (!ops->self_test_count)
 671                                 return -EOPNOTSUPP;
 672                         gstrings.len = ops->self_test_count(dev);
 673                         break;
 674                 case ETH_SS_STATS:
 675                         if (!ops->get_stats_count)
 676                                 return -EOPNOTSUPP;
 677                         gstrings.len = ops->get_stats_count(dev);
 678                         break;
 679                 default:
 680                         return -EINVAL;
 681                 }
 682         }
 683
 684         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 685         if (!data)
 686                 return -ENOMEM;
 687
 688         ops->get_strings(dev, gstrings.string_set, data);
 689
 690         ret = -EFAULT;
 691         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 692                 goto out;
 693         useraddr += sizeof(gstrings);
 694         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 695                 goto out;
 696         ret = 0;
 697
 698  out:
 699         kfree(data);
 700         return ret;
 701 }
 702
 703 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 704 {
 705         struct ethtool_value id;
 706
 707         if (!dev->ethtool_ops->phys_id)
 708                 return -EOPNOTSUPP;
 709
 710         if (copy_from_user(&id, useraddr, sizeof(id)))
 711                 return -EFAULT;
 712
 713         return dev->ethtool_ops->phys_id(dev, id.data);
 714 }
 715
 716 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 717 {
 718         struct ethtool_stats stats;
 719         const struct ethtool_ops *ops = dev->ethtool_ops;
 720         u64 *data;
 721         int ret, n_stats;
 722
 723         if (!ops->get_ethtool_stats)
 724                 return -EOPNOTSUPP;
 725         if (!ops->get_sset_count && !ops->get_stats_count)
 726                 return -EOPNOTSUPP;
 727
 728         if (ops->get_sset_count)
 729                 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
 730         else
 731                 /* code path for obsolete hook */
 732                 n_stats = ops->get_stats_count(dev);
 733         if (n_stats < 0)
 734                 return n_stats;
 735         WARN_ON(n_stats == 0);
 736
 737         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 738                 return -EFAULT;
 739
 740         stats.n_stats = n_stats;
 741         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
 742         if (!data)
 743                 return -ENOMEM;
 744
 745         ops->get_ethtool_stats(dev, &stats, data);
 746
 747         ret = -EFAULT;
 748         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 749                 goto out;
 750         useraddr += sizeof(stats);
 751         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 752                 goto out;
 753         ret = 0;
 754
 755  out:
 756         kfree(data);
 757         return ret;
 758 }
 759
 760 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 761 {
 762         struct ethtool_perm_addr epaddr;
 763
 764         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
 765                 return -EFAULT;
 766
 767         if (epaddr.size < dev->addr_len)
 768                 return -ETOOSMALL;
 769         epaddr.size = dev->addr_len;
 770
 771         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 772                 return -EFAULT;
 773         useraddr += sizeof(epaddr);
 774         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
 775                 return -EFAULT;
 776         return 0;
 777 }
 778
 779 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
 780                              u32 cmd, u32 (*actor)(struct net_device *))
 781 {
 782         struct ethtool_value edata = { cmd };
 783
 784         if (!actor)
 785                 return -EOPNOTSUPP;
 786
 787         edata.data = actor(dev);
 788
 789         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 790                 return -EFAULT;
 791         return 0;
 792 }
 793
 794 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
 795                              void (*actor)(struct net_device *, u32))
 796 {
 797         struct ethtool_value edata;
 798
 799         if (!actor)
 800                 return -EOPNOTSUPP;
 801
 802         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 803                 return -EFAULT;
 804
 805         actor(dev, edata.data);
 806         return 0;
 807 }
 808
 809 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
 810                              int (*actor)(struct net_device *, u32))
 811 {
 812         struct ethtool_value edata;
 813
 814         if (!actor)
 815                 return -EOPNOTSUPP;
 816
 817         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 818                 return -EFAULT;
 819
 820         return actor(dev, edata.data);
 821 }
 822
 823 /* The main entry point in this file.  Called from net/core/dev.c */
 824
 825 int dev_ethtool(struct net *net, struct ifreq *ifr)
 826 {
 827         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
 828         void __user *useraddr = ifr->ifr_data;
 829         u32 ethcmd;
 830         int rc;
 831         unsigned long old_features;
 832
 833         if (!dev || !netif_device_present(dev))
 834                 return -ENODEV;
 835
 836         if (!dev->ethtool_ops)
 837                 return -EOPNOTSUPP;
 838
 839         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 840                 return -EFAULT;
 841
 842         /* Allow some commands to be done by anyone */
 843         switch(ethcmd) {
 844         case ETHTOOL_GDRVINFO:
 845         case ETHTOOL_GMSGLVL:
 846         case ETHTOOL_GCOALESCE:
 847         case ETHTOOL_GRINGPARAM:
 848         case ETHTOOL_GPAUSEPARAM:
 849         case ETHTOOL_GRXCSUM:
 850         case ETHTOOL_GTXCSUM:
 851         case ETHTOOL_GSG:
 852         case ETHTOOL_GSTRINGS:
 853         case ETHTOOL_GTSO:
 854         case ETHTOOL_GPERMADDR:
 855         case ETHTOOL_GUFO:
 856         case ETHTOOL_GGSO:
 857         case ETHTOOL_GFLAGS:
 858         case ETHTOOL_GPFLAGS:
 859         case ETHTOOL_GRXFH:
 860                 break;
 861         default:
 862                 if (!capable(CAP_NET_ADMIN))
 863                         return -EPERM;
 864         }
 865
 866         if (dev->ethtool_ops->begin)
 867                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 868                         return rc;
 869
 870         old_features = dev->features;
 871
 872         switch (ethcmd) {
 873         case ETHTOOL_GSET:
 874                 rc = ethtool_get_settings(dev, useraddr);
 875                 break;
 876         case ETHTOOL_SSET:
 877                 rc = ethtool_set_settings(dev, useraddr);
 878                 break;
 879         case ETHTOOL_GDRVINFO:
 880                 rc = ethtool_get_drvinfo(dev, useraddr);
 881                 break;
 882         case ETHTOOL_GREGS:
 883                 rc = ethtool_get_regs(dev, useraddr);
 884                 break;
 885         case ETHTOOL_GWOL:
 886                 rc = ethtool_get_wol(dev, useraddr);
 887                 break;
 888         case ETHTOOL_SWOL:
 889                 rc = ethtool_set_wol(dev, useraddr);
 890                 break;
 891         case ETHTOOL_GMSGLVL:
 892                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 893                                        dev->ethtool_ops->get_msglevel);
 894                 break;
 895         case ETHTOOL_SMSGLVL:
 896                 rc = ethtool_set_value_void(dev, useraddr,
 897                                        dev->ethtool_ops->set_msglevel);
 898                 break;
 899         case ETHTOOL_NWAY_RST:
 900                 rc = ethtool_nway_reset(dev);
 901                 break;
 902         case ETHTOOL_GLINK:
 903                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 904                                        dev->ethtool_ops->get_link);
 905                 break;
 906         case ETHTOOL_GEEPROM:
 907                 rc = ethtool_get_eeprom(dev, useraddr);
 908                 break;
 909         case ETHTOOL_SEEPROM:
 910                 rc = ethtool_set_eeprom(dev, useraddr);
 911                 break;
 912         case ETHTOOL_GCOALESCE:
 913                 rc = ethtool_get_coalesce(dev, useraddr);
 914                 break;
 915         case ETHTOOL_SCOALESCE:
 916                 rc = ethtool_set_coalesce(dev, useraddr);
 917                 break;
 918         case ETHTOOL_GRINGPARAM:
 919                 rc = ethtool_get_ringparam(dev, useraddr);
 920                 break;
 921         case ETHTOOL_SRINGPARAM:
 922                 rc = ethtool_set_ringparam(dev, useraddr);
 923                 break;
 924         case ETHTOOL_GPAUSEPARAM:
 925                 rc = ethtool_get_pauseparam(dev, useraddr);
 926                 break;
 927         case ETHTOOL_SPAUSEPARAM:
 928                 rc = ethtool_set_pauseparam(dev, useraddr);
 929                 break;
 930         case ETHTOOL_GRXCSUM:
 931                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 932                                        dev->ethtool_ops->get_rx_csum);
 933                 break;
 934         case ETHTOOL_SRXCSUM:
 935                 rc = ethtool_set_value(dev, useraddr,
 936                                        dev->ethtool_ops->set_rx_csum);
 937                 break;
 938         case ETHTOOL_GTXCSUM:
 939                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 940                                        (dev->ethtool_ops->get_tx_csum ?
 941                                         dev->ethtool_ops->get_tx_csum :
 942                                         ethtool_op_get_tx_csum));
 943                 break;
 944         case ETHTOOL_STXCSUM:
 945                 rc = ethtool_set_tx_csum(dev, useraddr);
 946                 break;
 947         case ETHTOOL_GSG:
 948                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 949                                        (dev->ethtool_ops->get_sg ?
 950                                         dev->ethtool_ops->get_sg :
 951                                         ethtool_op_get_sg));
 952                 break;
 953         case ETHTOOL_SSG:
 954                 rc = ethtool_set_sg(dev, useraddr);
 955                 break;
 956         case ETHTOOL_GTSO:
 957                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 958                                        (dev->ethtool_ops->get_tso ?
 959                                         dev->ethtool_ops->get_tso :
 960                                         ethtool_op_get_tso));
 961                 break;
 962         case ETHTOOL_STSO:
 963                 rc = ethtool_set_tso(dev, useraddr);
 964                 break;
 965         case ETHTOOL_TEST:
 966                 rc = ethtool_self_test(dev, useraddr);
 967                 break;
 968         case ETHTOOL_GSTRINGS:
 969                 rc = ethtool_get_strings(dev, useraddr);
 970                 break;
 971         case ETHTOOL_PHYS_ID:
 972                 rc = ethtool_phys_id(dev, useraddr);
 973                 break;
 974         case ETHTOOL_GSTATS:
 975                 rc = ethtool_get_stats(dev, useraddr);
 976                 break;
 977         case ETHTOOL_GPERMADDR:
 978                 rc = ethtool_get_perm_addr(dev, useraddr);
 979                 break;
 980         case ETHTOOL_GUFO:
 981                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 982                                        (dev->ethtool_ops->get_ufo ?
 983                                         dev->ethtool_ops->get_ufo :
 984                                         ethtool_op_get_ufo));
 985                 break;
 986         case ETHTOOL_SUFO:
 987                 rc = ethtool_set_ufo(dev, useraddr);
 988                 break;
 989         case ETHTOOL_GGSO:
 990                 rc = ethtool_get_gso(dev, useraddr);
 991                 break;
 992         case ETHTOOL_SGSO:
 993                 rc = ethtool_set_gso(dev, useraddr);
 994                 break;
 995         case ETHTOOL_GFLAGS:
 996                 rc = ethtool_get_value(dev, useraddr, ethcmd,
 997                                        dev->ethtool_ops->get_flags);
 998                 break;
 999         case ETHTOOL_SFLAGS:
1000                 rc = ethtool_set_value(dev, useraddr,
1001                                        dev->ethtool_ops->set_flags);
1002                 break;
1003         case ETHTOOL_GPFLAGS:
1004                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1005                                        dev->ethtool_ops->get_priv_flags);
1006                 break;
1007         case ETHTOOL_SPFLAGS:
1008                 rc = ethtool_set_value(dev, useraddr,
1009                                        dev->ethtool_ops->set_priv_flags);
1010                 break;
1011         case ETHTOOL_GRXFH:
1012                 rc = ethtool_get_rxhash(dev, useraddr);
1013                 break;
1014         case ETHTOOL_SRXFH:
1015                 rc = ethtool_set_rxhash(dev, useraddr);
1016                 break;
1017         default:
1018                 rc = -EOPNOTSUPP;
1019         }
1020
1021         if (dev->ethtool_ops->complete)
1022                 dev->ethtool_ops->complete(dev);
1023
1024         if (old_features != dev->features)
1025                 netdev_features_change(dev);
1026
1027         return rc;
1028 }
1029
1030 EXPORT_SYMBOL(ethtool_op_get_link);
1031 EXPORT_SYMBOL(ethtool_op_get_sg);
1032 EXPORT_SYMBOL(ethtool_op_get_tso);
1033 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
1034 EXPORT_SYMBOL(ethtool_op_set_sg);
1035 EXPORT_SYMBOL(ethtool_op_set_tso);
1036 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1037 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
1038 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
1039 EXPORT_SYMBOL(ethtool_op_set_ufo);
1040 EXPORT_SYMBOL(ethtool_op_get_ufo);
1041 EXPORT_SYMBOL(ethtool_op_set_flags);
1042 EXPORT_SYMBOL(ethtool_op_get_flags);