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_rx_csum(struct net_device *dev)
  34 {
  35         return (dev->features & NETIF_F_ALL_CSUM) != 0;
  36 }
  37 EXPORT_SYMBOL(ethtool_op_get_rx_csum);
  38
  39 u32 ethtool_op_get_tx_csum(struct net_device *dev)
  40 {
  41         return (dev->features & NETIF_F_ALL_CSUM) != 0;
  42 }
  43 EXPORT_SYMBOL(ethtool_op_get_tx_csum);
  44
  45 int ethtool_op_set_tx_csum(struct net_device *dev, u32 data)
  46 {
  47         if (data)
  48                 dev->features |= NETIF_F_IP_CSUM;
  49         else
  50                 dev->features &= ~NETIF_F_IP_CSUM;
  51
  52         return 0;
  53 }
  54
  55 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
  56 {
  57         if (data)
  58                 dev->features |= NETIF_F_HW_CSUM;
  59         else
  60                 dev->features &= ~NETIF_F_HW_CSUM;
  61
  62         return 0;
  63 }
  64
  65 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
  66 {
  67         if (data)
  68                 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
  69         else
  70                 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
  71
  72         return 0;
  73 }
  74
  75 u32 ethtool_op_get_sg(struct net_device *dev)
  76 {
  77         return (dev->features & NETIF_F_SG) != 0;
  78 }
  79
  80 int ethtool_op_set_sg(struct net_device *dev, u32 data)
  81 {
  82         if (data)
  83                 dev->features |= NETIF_F_SG;
  84         else
  85                 dev->features &= ~NETIF_F_SG;
  86
  87         return 0;
  88 }
  89
  90 u32 ethtool_op_get_tso(struct net_device *dev)
  91 {
  92         return (dev->features & NETIF_F_TSO) != 0;
  93 }
  94
  95 int ethtool_op_set_tso(struct net_device *dev, u32 data)
  96 {
  97         if (data)
  98                 dev->features |= NETIF_F_TSO;
  99         else
 100                 dev->features &= ~NETIF_F_TSO;
 101
 102         return 0;
 103 }
 104
 105 u32 ethtool_op_get_ufo(struct net_device *dev)
 106 {
 107         return (dev->features & NETIF_F_UFO) != 0;
 108 }
 109
 110 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
 111 {
 112         if (data)
 113                 dev->features |= NETIF_F_UFO;
 114         else
 115                 dev->features &= ~NETIF_F_UFO;
 116         return 0;
 117 }
 118
 119 /* the following list of flags are the same as their associated
 120  * NETIF_F_xxx values in include/linux/netdevice.h
 121  */
 122 static const u32 flags_dup_features =
 123         ETH_FLAG_LRO;
 124
 125 u32 ethtool_op_get_flags(struct net_device *dev)
 126 {
 127         /* in the future, this function will probably contain additional
 128          * handling for flags which are not so easily handled
 129          * by a simple masking operation
 130          */
 131
 132         return dev->features & flags_dup_features;
 133 }
 134
 135 int ethtool_op_set_flags(struct net_device *dev, u32 data)
 136 {
 137         if (data & ETH_FLAG_LRO)
 138                 dev->features |= NETIF_F_LRO;
 139         else
 140                 dev->features &= ~NETIF_F_LRO;
 141
 142         return 0;
 143 }
 144
 145 /* Handlers for each ethtool command */
 146
 147 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 148 {
 149         struct ethtool_cmd cmd = { ETHTOOL_GSET };
 150         int err;
 151
 152         if (!dev->ethtool_ops->get_settings)
 153                 return -EOPNOTSUPP;
 154
 155         err = dev->ethtool_ops->get_settings(dev, &cmd);
 156         if (err < 0)
 157                 return err;
 158
 159         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 160                 return -EFAULT;
 161         return 0;
 162 }
 163
 164 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 165 {
 166         struct ethtool_cmd cmd;
 167
 168         if (!dev->ethtool_ops->set_settings)
 169                 return -EOPNOTSUPP;
 170
 171         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 172                 return -EFAULT;
 173
 174         return dev->ethtool_ops->set_settings(dev, &cmd);
 175 }
 176
 177 static int ethtool_get_drvinfo(struct net_device *dev, void __user *useraddr)
 178 {
 179         struct ethtool_drvinfo info;
 180         const struct ethtool_ops *ops = dev->ethtool_ops;
 181
 182         if (!ops->get_drvinfo)
 183                 return -EOPNOTSUPP;
 184
 185         memset(&info, 0, sizeof(info));
 186         info.cmd = ETHTOOL_GDRVINFO;
 187         ops->get_drvinfo(dev, &info);
 188
 189         if (ops->get_sset_count) {
 190                 int rc;
 191
 192                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 193                 if (rc >= 0)
 194                         info.testinfo_len = rc;
 195                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 196                 if (rc >= 0)
 197                         info.n_stats = rc;
 198                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 199                 if (rc >= 0)
 200                         info.n_priv_flags = rc;
 201         } else {
 202                 /* code path for obsolete hooks */
 203
 204                 if (ops->self_test_count)
 205                         info.testinfo_len = ops->self_test_count(dev);
 206                 if (ops->get_stats_count)
 207                         info.n_stats = ops->get_stats_count(dev);
 208         }
 209         if (ops->get_regs_len)
 210                 info.regdump_len = ops->get_regs_len(dev);
 211         if (ops->get_eeprom_len)
 212                 info.eedump_len = ops->get_eeprom_len(dev);
 213
 214         if (copy_to_user(useraddr, &info, sizeof(info)))
 215                 return -EFAULT;
 216         return 0;
 217 }
 218
 219 static int ethtool_set_rxnfc(struct net_device *dev,
 220                              u32 cmd, void __user *useraddr)
 221 {
 222         struct ethtool_rxnfc info;
 223         size_t info_size = sizeof(info);
 224
 225         if (!dev->ethtool_ops->set_rxnfc)
 226                 return -EOPNOTSUPP;
 227
 228         /* struct ethtool_rxnfc was originally defined for
 229          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 230          * members.  User-space might still be using that
 231          * definition. */
 232         if (cmd == ETHTOOL_SRXFH)
 233                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 234                              sizeof(info.data));
 235
 236         if (copy_from_user(&info, useraddr, info_size))
 237                 return -EFAULT;
 238
 239         return dev->ethtool_ops->set_rxnfc(dev, &info);
 240 }
 241
 242 static int ethtool_get_rxnfc(struct net_device *dev,
 243                              u32 cmd, void __user *useraddr)
 244 {
 245         struct ethtool_rxnfc info;
 246         size_t info_size = sizeof(info);
 247         const struct ethtool_ops *ops = dev->ethtool_ops;
 248         int ret;
 249         void *rule_buf = NULL;
 250
 251         if (!ops->get_rxnfc)
 252                 return -EOPNOTSUPP;
 253
 254         /* struct ethtool_rxnfc was originally defined for
 255          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 256          * members.  User-space might still be using that
 257          * definition. */
 258         if (cmd == ETHTOOL_GRXFH)
 259                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 260                              sizeof(info.data));
 261
 262         if (copy_from_user(&info, useraddr, info_size))
 263                 return -EFAULT;
 264
 265         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 266                 if (info.rule_cnt > 0) {
 267                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
 268                                 rule_buf = kmalloc(info.rule_cnt * sizeof(u32),
 269                                                    GFP_USER);
 270                         if (!rule_buf)
 271                                 return -ENOMEM;
 272                 }
 273         }
 274
 275         ret = ops->get_rxnfc(dev, &info, rule_buf);
 276         if (ret < 0)
 277                 goto err_out;
 278
 279         ret = -EFAULT;
 280         if (copy_to_user(useraddr, &info, info_size))
 281                 goto err_out;
 282
 283         if (rule_buf) {
 284                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 285                 if (copy_to_user(useraddr, rule_buf,
 286                                  info.rule_cnt * sizeof(u32)))
 287                         goto err_out;
 288         }
 289         ret = 0;
 290
 291 err_out:
 292         kfree(rule_buf);
 293
 294         return ret;
 295 }
 296
 297 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
 298 {
 299         struct ethtool_regs regs;
 300         const struct ethtool_ops *ops = dev->ethtool_ops;
 301         void *regbuf;
 302         int reglen, ret;
 303
 304         if (!ops->get_regs || !ops->get_regs_len)
 305                 return -EOPNOTSUPP;
 306
 307         if (copy_from_user(&regs, useraddr, sizeof(regs)))
 308                 return -EFAULT;
 309
 310         reglen = ops->get_regs_len(dev);
 311         if (regs.len > reglen)
 312                 regs.len = reglen;
 313
 314         regbuf = kmalloc(reglen, GFP_USER);
 315         if (!regbuf)
 316                 return -ENOMEM;
 317
 318         ops->get_regs(dev, &regs, regbuf);
 319
 320         ret = -EFAULT;
 321         if (copy_to_user(useraddr, &regs, sizeof(regs)))
 322                 goto out;
 323         useraddr += offsetof(struct ethtool_regs, data);
 324         if (copy_to_user(useraddr, regbuf, regs.len))
 325                 goto out;
 326         ret = 0;
 327
 328  out:
 329         kfree(regbuf);
 330         return ret;
 331 }
 332
 333 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
 334 {
 335         struct ethtool_wolinfo wol = { ETHTOOL_GWOL };
 336
 337         if (!dev->ethtool_ops->get_wol)
 338                 return -EOPNOTSUPP;
 339
 340         dev->ethtool_ops->get_wol(dev, &wol);
 341
 342         if (copy_to_user(useraddr, &wol, sizeof(wol)))
 343                 return -EFAULT;
 344         return 0;
 345 }
 346
 347 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
 348 {
 349         struct ethtool_wolinfo wol;
 350
 351         if (!dev->ethtool_ops->set_wol)
 352                 return -EOPNOTSUPP;
 353
 354         if (copy_from_user(&wol, useraddr, sizeof(wol)))
 355                 return -EFAULT;
 356
 357         return dev->ethtool_ops->set_wol(dev, &wol);
 358 }
 359
 360 static int ethtool_nway_reset(struct net_device *dev)
 361 {
 362         if (!dev->ethtool_ops->nway_reset)
 363                 return -EOPNOTSUPP;
 364
 365         return dev->ethtool_ops->nway_reset(dev);
 366 }
 367
 368 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
 369 {
 370         struct ethtool_eeprom eeprom;
 371         const struct ethtool_ops *ops = dev->ethtool_ops;
 372         void __user *userbuf = useraddr + sizeof(eeprom);
 373         u32 bytes_remaining;
 374         u8 *data;
 375         int ret = 0;
 376
 377         if (!ops->get_eeprom || !ops->get_eeprom_len)
 378                 return -EOPNOTSUPP;
 379
 380         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 381                 return -EFAULT;
 382
 383         /* Check for wrap and zero */
 384         if (eeprom.offset + eeprom.len <= eeprom.offset)
 385                 return -EINVAL;
 386
 387         /* Check for exceeding total eeprom len */
 388         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 389                 return -EINVAL;
 390
 391         data = kmalloc(PAGE_SIZE, GFP_USER);
 392         if (!data)
 393                 return -ENOMEM;
 394
 395         bytes_remaining = eeprom.len;
 396         while (bytes_remaining > 0) {
 397                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
 398
 399                 ret = ops->get_eeprom(dev, &eeprom, data);
 400                 if (ret)
 401                         break;
 402                 if (copy_to_user(userbuf, data, eeprom.len)) {
 403                         ret = -EFAULT;
 404                         break;
 405                 }
 406                 userbuf += eeprom.len;
 407                 eeprom.offset += eeprom.len;
 408                 bytes_remaining -= eeprom.len;
 409         }
 410
 411         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
 412         eeprom.offset -= eeprom.len;
 413         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
 414                 ret = -EFAULT;
 415
 416         kfree(data);
 417         return ret;
 418 }
 419
 420 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
 421 {
 422         struct ethtool_eeprom eeprom;
 423         const struct ethtool_ops *ops = dev->ethtool_ops;
 424         void __user *userbuf = useraddr + sizeof(eeprom);
 425         u32 bytes_remaining;
 426         u8 *data;
 427         int ret = 0;
 428
 429         if (!ops->set_eeprom || !ops->get_eeprom_len)
 430                 return -EOPNOTSUPP;
 431
 432         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
 433                 return -EFAULT;
 434
 435         /* Check for wrap and zero */
 436         if (eeprom.offset + eeprom.len <= eeprom.offset)
 437                 return -EINVAL;
 438
 439         /* Check for exceeding total eeprom len */
 440         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
 441                 return -EINVAL;
 442
 443         data = kmalloc(PAGE_SIZE, GFP_USER);
 444         if (!data)
 445                 return -ENOMEM;
 446
 447         bytes_remaining = eeprom.len;
 448         while (bytes_remaining > 0) {
 449                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
 450
 451                 if (copy_from_user(data, userbuf, eeprom.len)) {
 452                         ret = -EFAULT;
 453                         break;
 454                 }
 455                 ret = ops->set_eeprom(dev, &eeprom, data);
 456                 if (ret)
 457                         break;
 458                 userbuf += eeprom.len;
 459                 eeprom.offset += eeprom.len;
 460                 bytes_remaining -= eeprom.len;
 461         }
 462
 463         kfree(data);
 464         return ret;
 465 }
 466
 467 static int ethtool_get_coalesce(struct net_device *dev, void __user *useraddr)
 468 {
 469         struct ethtool_coalesce coalesce = { ETHTOOL_GCOALESCE };
 470
 471         if (!dev->ethtool_ops->get_coalesce)
 472                 return -EOPNOTSUPP;
 473
 474         dev->ethtool_ops->get_coalesce(dev, &coalesce);
 475
 476         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
 477                 return -EFAULT;
 478         return 0;
 479 }
 480
 481 static int ethtool_set_coalesce(struct net_device *dev, void __user *useraddr)
 482 {
 483         struct ethtool_coalesce coalesce;
 484
 485         if (!dev->ethtool_ops->set_coalesce)
 486                 return -EOPNOTSUPP;
 487
 488         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
 489                 return -EFAULT;
 490
 491         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
 492 }
 493
 494 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
 495 {
 496         struct ethtool_ringparam ringparam = { ETHTOOL_GRINGPARAM };
 497
 498         if (!dev->ethtool_ops->get_ringparam)
 499                 return -EOPNOTSUPP;
 500
 501         dev->ethtool_ops->get_ringparam(dev, &ringparam);
 502
 503         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
 504                 return -EFAULT;
 505         return 0;
 506 }
 507
 508 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
 509 {
 510         struct ethtool_ringparam ringparam;
 511
 512         if (!dev->ethtool_ops->set_ringparam)
 513                 return -EOPNOTSUPP;
 514
 515         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
 516                 return -EFAULT;
 517
 518         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
 519 }
 520
 521 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
 522 {
 523         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
 524
 525         if (!dev->ethtool_ops->get_pauseparam)
 526                 return -EOPNOTSUPP;
 527
 528         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
 529
 530         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
 531                 return -EFAULT;
 532         return 0;
 533 }
 534
 535 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
 536 {
 537         struct ethtool_pauseparam pauseparam;
 538
 539         if (!dev->ethtool_ops->set_pauseparam)
 540                 return -EOPNOTSUPP;
 541
 542         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
 543                 return -EFAULT;
 544
 545         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
 546 }
 547
 548 static int __ethtool_set_sg(struct net_device *dev, u32 data)
 549 {
 550         int err;
 551
 552         if (!data && dev->ethtool_ops->set_tso) {
 553                 err = dev->ethtool_ops->set_tso(dev, 0);
 554                 if (err)
 555                         return err;
 556         }
 557
 558         if (!data && dev->ethtool_ops->set_ufo) {
 559                 err = dev->ethtool_ops->set_ufo(dev, 0);
 560                 if (err)
 561                         return err;
 562         }
 563         return dev->ethtool_ops->set_sg(dev, data);
 564 }
 565
 566 static int ethtool_set_tx_csum(struct net_device *dev, char __user *useraddr)
 567 {
 568         struct ethtool_value edata;
 569         int err;
 570
 571         if (!dev->ethtool_ops->set_tx_csum)
 572                 return -EOPNOTSUPP;
 573
 574         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 575                 return -EFAULT;
 576
 577         if (!edata.data && dev->ethtool_ops->set_sg) {
 578                 err = __ethtool_set_sg(dev, 0);
 579                 if (err)
 580                         return err;
 581         }
 582
 583         return dev->ethtool_ops->set_tx_csum(dev, edata.data);
 584 }
 585
 586 static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
 587 {
 588         struct ethtool_value edata;
 589
 590         if (!dev->ethtool_ops->set_rx_csum)
 591                 return -EOPNOTSUPP;
 592
 593         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 594                 return -EFAULT;
 595
 596         if (!edata.data && dev->ethtool_ops->set_sg)
 597                 dev->features &= ~NETIF_F_GRO;
 598
 599         return dev->ethtool_ops->set_rx_csum(dev, edata.data);
 600 }
 601
 602 static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 603 {
 604         struct ethtool_value edata;
 605
 606         if (!dev->ethtool_ops->set_sg)
 607                 return -EOPNOTSUPP;
 608
 609         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 610                 return -EFAULT;
 611
 612         if (edata.data &&
 613             !(dev->features & NETIF_F_ALL_CSUM))
 614                 return -EINVAL;
 615
 616         return __ethtool_set_sg(dev, edata.data);
 617 }
 618
 619 static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 620 {
 621         struct ethtool_value edata;
 622
 623         if (!dev->ethtool_ops->set_tso)
 624                 return -EOPNOTSUPP;
 625
 626         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 627                 return -EFAULT;
 628
 629         if (edata.data && !(dev->features & NETIF_F_SG))
 630                 return -EINVAL;
 631
 632         return dev->ethtool_ops->set_tso(dev, edata.data);
 633 }
 634
 635 static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 636 {
 637         struct ethtool_value edata;
 638
 639         if (!dev->ethtool_ops->set_ufo)
 640                 return -EOPNOTSUPP;
 641         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 642                 return -EFAULT;
 643         if (edata.data && !(dev->features & NETIF_F_SG))
 644                 return -EINVAL;
 645         if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 646                 return -EINVAL;
 647         return dev->ethtool_ops->set_ufo(dev, edata.data);
 648 }
 649
 650 static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 651 {
 652         struct ethtool_value edata = { ETHTOOL_GGSO };
 653
 654         edata.data = dev->features & NETIF_F_GSO;
 655         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 656                  return -EFAULT;
 657         return 0;
 658 }
 659
 660 static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 661 {
 662         struct ethtool_value edata;
 663
 664         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 665                 return -EFAULT;
 666         if (edata.data)
 667                 dev->features |= NETIF_F_GSO;
 668         else
 669                 dev->features &= ~NETIF_F_GSO;
 670         return 0;
 671 }
 672
 673 static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
 674 {
 675         struct ethtool_value edata = { ETHTOOL_GGRO };
 676
 677         edata.data = dev->features & NETIF_F_GRO;
 678         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 679                  return -EFAULT;
 680         return 0;
 681 }
 682
 683 static int ethtool_set_gro(struct net_device *dev, char __user *useraddr)
 684 {
 685         struct ethtool_value edata;
 686
 687         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 688                 return -EFAULT;
 689
 690         if (edata.data) {
 691                 if (!dev->ethtool_ops->get_rx_csum ||
 692                     !dev->ethtool_ops->get_rx_csum(dev))
 693                         return -EINVAL;
 694                 dev->features |= NETIF_F_GRO;
 695         } else
 696                 dev->features &= ~NETIF_F_GRO;
 697
 698         return 0;
 699 }
 700
 701 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 702 {
 703         struct ethtool_test test;
 704         const struct ethtool_ops *ops = dev->ethtool_ops;
 705         u64 *data;
 706         int ret, test_len;
 707
 708         if (!ops->self_test)
 709                 return -EOPNOTSUPP;
 710         if (!ops->get_sset_count && !ops->self_test_count)
 711                 return -EOPNOTSUPP;
 712
 713         if (ops->get_sset_count)
 714                 test_len = ops->get_sset_count(dev, ETH_SS_TEST);
 715         else
 716                 /* code path for obsolete hook */
 717                 test_len = ops->self_test_count(dev);
 718         if (test_len < 0)
 719                 return test_len;
 720         WARN_ON(test_len == 0);
 721
 722         if (copy_from_user(&test, useraddr, sizeof(test)))
 723                 return -EFAULT;
 724
 725         test.len = test_len;
 726         data = kmalloc(test_len * sizeof(u64), GFP_USER);
 727         if (!data)
 728                 return -ENOMEM;
 729
 730         ops->self_test(dev, &test, data);
 731
 732         ret = -EFAULT;
 733         if (copy_to_user(useraddr, &test, sizeof(test)))
 734                 goto out;
 735         useraddr += sizeof(test);
 736         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 737                 goto out;
 738         ret = 0;
 739
 740  out:
 741         kfree(data);
 742         return ret;
 743 }
 744
 745 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 746 {
 747         struct ethtool_gstrings gstrings;
 748         const struct ethtool_ops *ops = dev->ethtool_ops;
 749         u8 *data;
 750         int ret;
 751
 752         if (!ops->get_strings)
 753                 return -EOPNOTSUPP;
 754
 755         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 756                 return -EFAULT;
 757
 758         if (ops->get_sset_count) {
 759                 ret = ops->get_sset_count(dev, gstrings.string_set);
 760                 if (ret < 0)
 761                         return ret;
 762
 763                 gstrings.len = ret;
 764         } else {
 765                 /* code path for obsolete hooks */
 766
 767                 switch (gstrings.string_set) {
 768                 case ETH_SS_TEST:
 769                         if (!ops->self_test_count)
 770                                 return -EOPNOTSUPP;
 771                         gstrings.len = ops->self_test_count(dev);
 772                         break;
 773                 case ETH_SS_STATS:
 774                         if (!ops->get_stats_count)
 775                                 return -EOPNOTSUPP;
 776                         gstrings.len = ops->get_stats_count(dev);
 777                         break;
 778                 default:
 779                         return -EINVAL;
 780                 }
 781         }
 782
 783         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 784         if (!data)
 785                 return -ENOMEM;
 786
 787         ops->get_strings(dev, gstrings.string_set, data);
 788
 789         ret = -EFAULT;
 790         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 791                 goto out;
 792         useraddr += sizeof(gstrings);
 793         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 794                 goto out;
 795         ret = 0;
 796
 797  out:
 798         kfree(data);
 799         return ret;
 800 }
 801
 802 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 803 {
 804         struct ethtool_value id;
 805
 806         if (!dev->ethtool_ops->phys_id)
 807                 return -EOPNOTSUPP;
 808
 809         if (copy_from_user(&id, useraddr, sizeof(id)))
 810                 return -EFAULT;
 811
 812         return dev->ethtool_ops->phys_id(dev, id.data);
 813 }
 814
 815 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 816 {
 817         struct ethtool_stats stats;
 818         const struct ethtool_ops *ops = dev->ethtool_ops;
 819         u64 *data;
 820         int ret, n_stats;
 821
 822         if (!ops->get_ethtool_stats)
 823                 return -EOPNOTSUPP;
 824         if (!ops->get_sset_count && !ops->get_stats_count)
 825                 return -EOPNOTSUPP;
 826
 827         if (ops->get_sset_count)
 828                 n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
 829         else
 830                 /* code path for obsolete hook */
 831                 n_stats = ops->get_stats_count(dev);
 832         if (n_stats < 0)
 833                 return n_stats;
 834         WARN_ON(n_stats == 0);
 835
 836         if (copy_from_user(&stats, useraddr, sizeof(stats)))
 837                 return -EFAULT;
 838
 839         stats.n_stats = n_stats;
 840         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
 841         if (!data)
 842                 return -ENOMEM;
 843
 844         ops->get_ethtool_stats(dev, &stats, data);
 845
 846         ret = -EFAULT;
 847         if (copy_to_user(useraddr, &stats, sizeof(stats)))
 848                 goto out;
 849         useraddr += sizeof(stats);
 850         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 851                 goto out;
 852         ret = 0;
 853
 854  out:
 855         kfree(data);
 856         return ret;
 857 }
 858
 859 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 860 {
 861         struct ethtool_perm_addr epaddr;
 862
 863         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
 864                 return -EFAULT;
 865
 866         if (epaddr.size < dev->addr_len)
 867                 return -ETOOSMALL;
 868         epaddr.size = dev->addr_len;
 869
 870         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 871                 return -EFAULT;
 872         useraddr += sizeof(epaddr);
 873         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
 874                 return -EFAULT;
 875         return 0;
 876 }
 877
 878 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
 879                              u32 cmd, u32 (*actor)(struct net_device *))
 880 {
 881         struct ethtool_value edata = { cmd };
 882
 883         if (!actor)
 884                 return -EOPNOTSUPP;
 885
 886         edata.data = actor(dev);
 887
 888         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 889                 return -EFAULT;
 890         return 0;
 891 }
 892
 893 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
 894                              void (*actor)(struct net_device *, u32))
 895 {
 896         struct ethtool_value edata;
 897
 898         if (!actor)
 899                 return -EOPNOTSUPP;
 900
 901         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 902                 return -EFAULT;
 903
 904         actor(dev, edata.data);
 905         return 0;
 906 }
 907
 908 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
 909                              int (*actor)(struct net_device *, u32))
 910 {
 911         struct ethtool_value edata;
 912
 913         if (!actor)
 914                 return -EOPNOTSUPP;
 915
 916         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 917                 return -EFAULT;
 918
 919         return actor(dev, edata.data);
 920 }
 921
 922 static int ethtool_flash_device(struct net_device *dev, char __user *useraddr)
 923 {
 924         struct ethtool_flash efl;
 925
 926         if (copy_from_user(&efl, useraddr, sizeof(efl)))
 927                 return -EFAULT;
 928
 929         if (!dev->ethtool_ops->flash_device)
 930                 return -EOPNOTSUPP;
 931
 932         return dev->ethtool_ops->flash_device(dev, &efl);
 933 }
 934
 935 /* The main entry point in this file.  Called from net/core/dev.c */
 936
 937 int dev_ethtool(struct net *net, struct ifreq *ifr)
 938 {
 939         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
 940         void __user *useraddr = ifr->ifr_data;
 941         u32 ethcmd;
 942         int rc;
 943         unsigned long old_features;
 944
 945         if (!dev || !netif_device_present(dev))
 946                 return -ENODEV;
 947
 948         if (!dev->ethtool_ops)
 949                 return -EOPNOTSUPP;
 950
 951         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 952                 return -EFAULT;
 953
 954         /* Allow some commands to be done by anyone */
 955         switch(ethcmd) {
 956         case ETHTOOL_GDRVINFO:
 957         case ETHTOOL_GMSGLVL:
 958         case ETHTOOL_GCOALESCE:
 959         case ETHTOOL_GRINGPARAM:
 960         case ETHTOOL_GPAUSEPARAM:
 961         case ETHTOOL_GRXCSUM:
 962         case ETHTOOL_GTXCSUM:
 963         case ETHTOOL_GSG:
 964         case ETHTOOL_GSTRINGS:
 965         case ETHTOOL_GTSO:
 966         case ETHTOOL_GPERMADDR:
 967         case ETHTOOL_GUFO:
 968         case ETHTOOL_GGSO:
 969         case ETHTOOL_GFLAGS:
 970         case ETHTOOL_GPFLAGS:
 971         case ETHTOOL_GRXFH:
 972         case ETHTOOL_GRXRINGS:
 973         case ETHTOOL_GRXCLSRLCNT:
 974         case ETHTOOL_GRXCLSRULE:
 975         case ETHTOOL_GRXCLSRLALL:
 976                 break;
 977         default:
 978                 if (!capable(CAP_NET_ADMIN))
 979                         return -EPERM;
 980         }
 981
 982         if (dev->ethtool_ops->begin)
 983                 if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 984                         return rc;
 985
 986         old_features = dev->features;
 987
 988         switch (ethcmd) {
 989         case ETHTOOL_GSET:
 990                 rc = ethtool_get_settings(dev, useraddr);
 991                 break;
 992         case ETHTOOL_SSET:
 993                 rc = ethtool_set_settings(dev, useraddr);
 994                 break;
 995         case ETHTOOL_GDRVINFO:
 996                 rc = ethtool_get_drvinfo(dev, useraddr);
 997                 break;
 998         case ETHTOOL_GREGS:
 999                 rc = ethtool_get_regs(dev, useraddr);
1000                 break;
1001         case ETHTOOL_GWOL:
1002                 rc = ethtool_get_wol(dev, useraddr);
1003                 break;
1004         case ETHTOOL_SWOL:
1005                 rc = ethtool_set_wol(dev, useraddr);
1006                 break;
1007         case ETHTOOL_GMSGLVL:
1008                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1009                                        dev->ethtool_ops->get_msglevel);
1010                 break;
1011         case ETHTOOL_SMSGLVL:
1012                 rc = ethtool_set_value_void(dev, useraddr,
1013                                        dev->ethtool_ops->set_msglevel);
1014                 break;
1015         case ETHTOOL_NWAY_RST:
1016                 rc = ethtool_nway_reset(dev);
1017                 break;
1018         case ETHTOOL_GLINK:
1019                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1020                                        dev->ethtool_ops->get_link);
1021                 break;
1022         case ETHTOOL_GEEPROM:
1023                 rc = ethtool_get_eeprom(dev, useraddr);
1024                 break;
1025         case ETHTOOL_SEEPROM:
1026                 rc = ethtool_set_eeprom(dev, useraddr);
1027                 break;
1028         case ETHTOOL_GCOALESCE:
1029                 rc = ethtool_get_coalesce(dev, useraddr);
1030                 break;
1031         case ETHTOOL_SCOALESCE:
1032                 rc = ethtool_set_coalesce(dev, useraddr);
1033                 break;
1034         case ETHTOOL_GRINGPARAM:
1035                 rc = ethtool_get_ringparam(dev, useraddr);
1036                 break;
1037         case ETHTOOL_SRINGPARAM:
1038                 rc = ethtool_set_ringparam(dev, useraddr);
1039                 break;
1040         case ETHTOOL_GPAUSEPARAM:
1041                 rc = ethtool_get_pauseparam(dev, useraddr);
1042                 break;
1043         case ETHTOOL_SPAUSEPARAM:
1044                 rc = ethtool_set_pauseparam(dev, useraddr);
1045                 break;
1046         case ETHTOOL_GRXCSUM:
1047                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1048                                        (dev->ethtool_ops->get_rx_csum ?
1049                                         dev->ethtool_ops->get_rx_csum :
1050                                         ethtool_op_get_rx_csum));
1051                 break;
1052         case ETHTOOL_SRXCSUM:
1053                 rc = ethtool_set_rx_csum(dev, useraddr);
1054                 break;
1055         case ETHTOOL_GTXCSUM:
1056                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1057                                        (dev->ethtool_ops->get_tx_csum ?
1058                                         dev->ethtool_ops->get_tx_csum :
1059                                         ethtool_op_get_tx_csum));
1060                 break;
1061         case ETHTOOL_STXCSUM:
1062                 rc = ethtool_set_tx_csum(dev, useraddr);
1063                 break;
1064         case ETHTOOL_GSG:
1065                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1066                                        (dev->ethtool_ops->get_sg ?
1067                                         dev->ethtool_ops->get_sg :
1068                                         ethtool_op_get_sg));
1069                 break;
1070         case ETHTOOL_SSG:
1071                 rc = ethtool_set_sg(dev, useraddr);
1072                 break;
1073         case ETHTOOL_GTSO:
1074                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1075                                        (dev->ethtool_ops->get_tso ?
1076                                         dev->ethtool_ops->get_tso :
1077                                         ethtool_op_get_tso));
1078                 break;
1079         case ETHTOOL_STSO:
1080                 rc = ethtool_set_tso(dev, useraddr);
1081                 break;
1082         case ETHTOOL_TEST:
1083                 rc = ethtool_self_test(dev, useraddr);
1084                 break;
1085         case ETHTOOL_GSTRINGS:
1086                 rc = ethtool_get_strings(dev, useraddr);
1087                 break;
1088         case ETHTOOL_PHYS_ID:
1089                 rc = ethtool_phys_id(dev, useraddr);
1090                 break;
1091         case ETHTOOL_GSTATS:
1092                 rc = ethtool_get_stats(dev, useraddr);
1093                 break;
1094         case ETHTOOL_GPERMADDR:
1095                 rc = ethtool_get_perm_addr(dev, useraddr);
1096                 break;
1097         case ETHTOOL_GUFO:
1098                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1099                                        (dev->ethtool_ops->get_ufo ?
1100                                         dev->ethtool_ops->get_ufo :
1101                                         ethtool_op_get_ufo));
1102                 break;
1103         case ETHTOOL_SUFO:
1104                 rc = ethtool_set_ufo(dev, useraddr);
1105                 break;
1106         case ETHTOOL_GGSO:
1107                 rc = ethtool_get_gso(dev, useraddr);
1108                 break;
1109         case ETHTOOL_SGSO:
1110                 rc = ethtool_set_gso(dev, useraddr);
1111                 break;
1112         case ETHTOOL_GFLAGS:
1113                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1114                                        (dev->ethtool_ops->get_flags ?
1115                                         dev->ethtool_ops->get_flags :
1116                                         ethtool_op_get_flags));
1117                 break;
1118         case ETHTOOL_SFLAGS:
1119                 rc = ethtool_set_value(dev, useraddr,
1120                                        dev->ethtool_ops->set_flags);
1121                 break;
1122         case ETHTOOL_GPFLAGS:
1123                 rc = ethtool_get_value(dev, useraddr, ethcmd,
1124                                        dev->ethtool_ops->get_priv_flags);
1125                 break;
1126         case ETHTOOL_SPFLAGS:
1127                 rc = ethtool_set_value(dev, useraddr,
1128                                        dev->ethtool_ops->set_priv_flags);
1129                 break;
1130         case ETHTOOL_GRXFH:
1131         case ETHTOOL_GRXRINGS:
1132         case ETHTOOL_GRXCLSRLCNT:
1133         case ETHTOOL_GRXCLSRULE:
1134         case ETHTOOL_GRXCLSRLALL:
1135                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
1136                 break;
1137         case ETHTOOL_SRXFH:
1138         case ETHTOOL_SRXCLSRLDEL:
1139         case ETHTOOL_SRXCLSRLINS:
1140                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
1141                 break;
1142         case ETHTOOL_GGRO:
1143                 rc = ethtool_get_gro(dev, useraddr);
1144                 break;
1145         case ETHTOOL_SGRO:
1146                 rc = ethtool_set_gro(dev, useraddr);
1147                 break;
1148         case ETHTOOL_FLASHDEV:
1149                 rc = ethtool_flash_device(dev, useraddr);
1150                 break;
1151         default:
1152                 rc = -EOPNOTSUPP;
1153         }
1154
1155         if (dev->ethtool_ops->complete)
1156                 dev->ethtool_ops->complete(dev);
1157
1158         if (old_features != dev->features)
1159                 netdev_features_change(dev);
1160
1161         return rc;
1162 }
1163
1164 EXPORT_SYMBOL(ethtool_op_get_link);
1165 EXPORT_SYMBOL(ethtool_op_get_sg);
1166 EXPORT_SYMBOL(ethtool_op_get_tso);
1167 EXPORT_SYMBOL(ethtool_op_set_sg);
1168 EXPORT_SYMBOL(ethtool_op_set_tso);
1169 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1170 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
1171 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
1172 EXPORT_SYMBOL(ethtool_op_set_ufo);
1173 EXPORT_SYMBOL(ethtool_op_get_ufo);
1174 EXPORT_SYMBOL(ethtool_op_set_flags);
1175 EXPORT_SYMBOL(ethtool_op_get_flags);