LXR linux/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
  28u32 ethtool_op_get_link(struct net_device *dev)
  29{
  30        return netif_carrier_ok(dev) ? 1 : 0;
  31}
  32
  33u32 ethtool_op_get_tx_csum(struct net_device *dev)
  34{
  35        return (dev->features & NETIF_F_ALL_CSUM) != 0;
  36}
  37
  38int 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
  48int 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
  58int 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
  68u32 ethtool_op_get_sg(struct net_device *dev)
  69{
  70        return (dev->features & NETIF_F_SG) != 0;
  71}
  72
  73int 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
  83u32 ethtool_op_get_tso(struct net_device *dev)
  84{
  85        return (dev->features & NETIF_F_TSO) != 0;
  86}
  87
  88int 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
  98u32 ethtool_op_get_ufo(struct net_device *dev)
  99{
 100        return (dev->features & NETIF_F_UFO) != 0;
 101}
 102
 103int 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 */
 115static const u32 flags_dup_features =
 116        ETH_FLAG_LRO;
 117
 118u32 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
 128int 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
 140static 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
 157static 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
 170static 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
 212static 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
 225static 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
 242static 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
 278static 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
 292static 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
 305static 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
 313static 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
 365static 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
 412static 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
 426static 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
 439static 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
 453static 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
 466static 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
 480static 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
 493static 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
 511static 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
 531static int ethtool_set_rx_csum(struct net_device *dev, char __user *useraddr)
 532{
 533        struct ethtool_value edata;
 534
 535        if (!dev->ethtool_ops->set_rx_csum)
 536                return -EOPNOTSUPP;
 537
 538        if (copy_from_user(&edata, useraddr, sizeof(edata)))
 539                return -EFAULT;
 540
 541        if (!edata.data && dev->ethtool_ops->set_sg)
 542                dev->features &= ~NETIF_F_GRO;
 543
 544        return dev->ethtool_ops->set_rx_csum(dev, edata.data);
 545}
 546
 547static int ethtool_set_sg(struct net_device *dev, char __user *useraddr)
 548{
 549        struct ethtool_value edata;
 550
 551        if (!dev->ethtool_ops->set_sg)
 552                return -EOPNOTSUPP;
 553
 554        if (copy_from_user(&edata, useraddr, sizeof(edata)))
 555                return -EFAULT;
 556
 557        if (edata.data &&
 558            !(dev->features & NETIF_F_ALL_CSUM))
 559                return -EINVAL;
 560
 561        return __ethtool_set_sg(dev, edata.data);
 562}
 563
 564static int ethtool_set_tso(struct net_device *dev, char __user *useraddr)
 565{
 566        struct ethtool_value edata;
 567
 568        if (!dev->ethtool_ops->set_tso)
 569                return -EOPNOTSUPP;
 570
 571        if (copy_from_user(&edata, useraddr, sizeof(edata)))
 572                return -EFAULT;
 573
 574        if (edata.data && !(dev->features & NETIF_F_SG))
 575                return -EINVAL;
 576
 577        return dev->ethtool_ops->set_tso(dev, edata.data);
 578}
 579
 580static int ethtool_set_ufo(struct net_device *dev, char __user *useraddr)
 581{
 582        struct ethtool_value edata;
 583
 584        if (!dev->ethtool_ops->set_ufo)
 585                return -EOPNOTSUPP;
 586        if (copy_from_user(&edata, useraddr, sizeof(edata)))
 587                return -EFAULT;
 588        if (edata.data && !(dev->features & NETIF_F_SG))
 589                return -EINVAL;
 590        if (edata.data && !(dev->features & NETIF_F_HW_CSUM))
 591                return -EINVAL;
 592        return dev->ethtool_ops->set_ufo(dev, edata.data);
 593}
 594
 595static int ethtool_get_gso(struct net_device *dev, char __user *useraddr)
 596{
 597        struct ethtool_value edata = { ETHTOOL_GGSO };
 598
 599        edata.data = dev->features & NETIF_F_GSO;
 600        if (copy_to_user(useraddr, &edata, sizeof(edata)))
 601                 return -EFAULT;
 602        return 0;
 603}
 604
 605static int ethtool_set_gso(struct net_device *dev, char __user *useraddr)
 606{
 607        struct ethtool_value edata;
 608
 609        if (copy_from_user(&edata, useraddr, sizeof(edata)))
 610                return -EFAULT;
 611        if (edata.data)
 612                dev->features |= NETIF_F_GSO;
 613        else
 614                dev->features &= ~NETIF_F_GSO;
 615        return 0;
 616}
 617
 618static int ethtool_get_gro(struct net_device *dev, char __user *useraddr)
 619{
 620        struct ethtool_value edata = { ETHTOOL_GGRO };
 621
 622        edata.data = dev->features & NETIF_F_GRO;
 623        if (copy_to_user(useraddr, &edata, sizeof(edata)))
 624                 return -EFAULT;
 625        return 0;
 626}
 627
 628static int ethtool_set_gro(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
 635        if (edata.data) {
 636                if (!dev->ethtool_ops->get_rx_csum ||
 637                    !dev->ethtool_ops->get_rx_csum(dev))
 638                        return -EINVAL;
 639                dev->features |= NETIF_F_GRO;
 640        } else
 641                dev->features &= ~NETIF_F_GRO;
 642
 643        return 0;
 644}
 645
 646static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
 647{
 648        struct ethtool_test test;
 649        const struct ethtool_ops *ops = dev->ethtool_ops;
 650        u64 *data;
 651        int ret, test_len;
 652
 653        if (!ops->self_test)
 654                return -EOPNOTSUPP;
 655        if (!ops->get_sset_count && !ops->self_test_count)
 656                return -EOPNOTSUPP;
 657
 658        if (ops->get_sset_count)
 659                test_len = ops->get_sset_count(dev, ETH_SS_TEST);
 660        else
 661                /* code path for obsolete hook */
 662                test_len = ops->self_test_count(dev);
 663        if (test_len < 0)
 664                return test_len;
 665        WARN_ON(test_len == 0);
 666
 667        if (copy_from_user(&test, useraddr, sizeof(test)))
 668                return -EFAULT;
 669
 670        test.len = test_len;
 671        data = kmalloc(test_len * sizeof(u64), GFP_USER);
 672        if (!data)
 673                return -ENOMEM;
 674
 675        ops->self_test(dev, &test, data);
 676
 677        ret = -EFAULT;
 678        if (copy_to_user(useraddr, &test, sizeof(test)))
 679                goto out;
 680        useraddr += sizeof(test);
 681        if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
 682                goto out;
 683        ret = 0;
 684
 685 out:
 686        kfree(data);
 687        return ret;
 688}
 689
 690static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
 691{
 692        struct ethtool_gstrings gstrings;
 693        const struct ethtool_ops *ops = dev->ethtool_ops;
 694        u8 *data;
 695        int ret;
 696
 697        if (!ops->get_strings)
 698                return -EOPNOTSUPP;
 699
 700        if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 701                return -EFAULT;
 702
 703        if (ops->get_sset_count) {
 704                ret = ops->get_sset_count(dev, gstrings.string_set);
 705                if (ret < 0)
 706                        return ret;
 707
 708                gstrings.len = ret;
 709        } else {
 710                /* code path for obsolete hooks */
 711
 712                switch (gstrings.string_set) {
 713                case ETH_SS_TEST:
 714                        if (!ops->self_test_count)
 715                                return -EOPNOTSUPP;
 716                        gstrings.len = ops->self_test_count(dev);
 717                        break;
 718                case ETH_SS_STATS:
 719                        if (!ops->get_stats_count)
 720                                return -EOPNOTSUPP;
 721                        gstrings.len = ops->get_stats_count(dev);
 722                        break;
 723                default:
 724                        return -EINVAL;
 725                }
 726        }
 727
 728        data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 729        if (!data)
 730                return -ENOMEM;
 731
 732        ops->get_strings(dev, gstrings.string_set, data);
 733
 734        ret = -EFAULT;
 735        if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
 736                goto out;
 737        useraddr += sizeof(gstrings);
 738        if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
 739                goto out;
 740        ret = 0;
 741
 742 out:
 743        kfree(data);
 744        return ret;
 745}
 746
 747static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
 748{
 749        struct ethtool_value id;
 750
 751        if (!dev->ethtool_ops->phys_id)
 752                return -EOPNOTSUPP;
 753
 754        if (copy_from_user(&id, useraddr, sizeof(id)))
 755                return -EFAULT;
 756
 757        return dev->ethtool_ops->phys_id(dev, id.data);
 758}
 759
 760static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
 761{
 762        struct ethtool_stats stats;
 763        const struct ethtool_ops *ops = dev->ethtool_ops;
 764        u64 *data;
 765        int ret, n_stats;
 766
 767        if (!ops->get_ethtool_stats)
 768                return -EOPNOTSUPP;
 769        if (!ops->get_sset_count && !ops->get_stats_count)
 770                return -EOPNOTSUPP;
 771
 772        if (ops->get_sset_count)
 773                n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
 774        else
 775                /* code path for obsolete hook */
 776                n_stats = ops->get_stats_count(dev);
 777        if (n_stats < 0)
 778                return n_stats;
 779        WARN_ON(n_stats == 0);
 780
 781        if (copy_from_user(&stats, useraddr, sizeof(stats)))
 782                return -EFAULT;
 783
 784        stats.n_stats = n_stats;
 785        data = kmalloc(n_stats * sizeof(u64), GFP_USER);
 786        if (!data)
 787                return -ENOMEM;
 788
 789        ops->get_ethtool_stats(dev, &stats, data);
 790
 791        ret = -EFAULT;
 792        if (copy_to_user(useraddr, &stats, sizeof(stats)))
 793                goto out;
 794        useraddr += sizeof(stats);
 795        if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
 796                goto out;
 797        ret = 0;
 798
 799 out:
 800        kfree(data);
 801        return ret;
 802}
 803
 804static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
 805{
 806        struct ethtool_perm_addr epaddr;
 807
 808        if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
 809                return -EFAULT;
 810
 811        if (epaddr.size < dev->addr_len)
 812                return -ETOOSMALL;
 813        epaddr.size = dev->addr_len;
 814
 815        if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
 816                return -EFAULT;
 817        useraddr += sizeof(epaddr);
 818        if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
 819                return -EFAULT;
 820        return 0;
 821}
 822
 823static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
 824                             u32 cmd, u32 (*actor)(struct net_device *))
 825{
 826        struct ethtool_value edata = { cmd };
 827
 828        if (!actor)
 829                return -EOPNOTSUPP;
 830
 831        edata.data = actor(dev);
 832
 833        if (copy_to_user(useraddr, &edata, sizeof(edata)))
 834                return -EFAULT;
 835        return 0;
 836}
 837
 838static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
 839                             void (*actor)(struct net_device *, u32))
 840{
 841        struct ethtool_value edata;
 842
 843        if (!actor)
 844                return -EOPNOTSUPP;
 845
 846        if (copy_from_user(&edata, useraddr, sizeof(edata)))
 847                return -EFAULT;
 848
 849        actor(dev, edata.data);
 850        return 0;
 851}
 852
 853static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
 854                             int (*actor)(struct net_device *, u32))
 855{
 856        struct ethtool_value edata;
 857
 858        if (!actor)
 859                return -EOPNOTSUPP;
 860
 861        if (copy_from_user(&edata, useraddr, sizeof(edata)))
 862                return -EFAULT;
 863
 864        return actor(dev, edata.data);
 865}
 866
 867/* The main entry point in this file.  Called from net/core/dev.c */
 868
 869int dev_ethtool(struct net *net, struct ifreq *ifr)
 870{
 871        struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
 872        void __user *useraddr = ifr->ifr_data;
 873        u32 ethcmd;
 874        int rc;
 875        unsigned long old_features;
 876
 877        if (!dev || !netif_device_present(dev))
 878                return -ENODEV;
 879
 880        if (!dev->ethtool_ops)
 881                return -EOPNOTSUPP;
 882
 883        if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
 884                return -EFAULT;
 885
 886        /* Allow some commands to be done by anyone */
 887        switch(ethcmd) {
 888        case ETHTOOL_GDRVINFO:
 889        case ETHTOOL_GMSGLVL:
 890        case ETHTOOL_GCOALESCE:
 891        case ETHTOOL_GRINGPARAM:
 892        case ETHTOOL_GPAUSEPARAM:
 893        case ETHTOOL_GRXCSUM:
 894        case ETHTOOL_GTXCSUM:
 895        case ETHTOOL_GSG:
 896        case ETHTOOL_GSTRINGS:
 897        case ETHTOOL_GTSO:
 898        case ETHTOOL_GPERMADDR:
 899        case ETHTOOL_GUFO:
 900        case ETHTOOL_GGSO:
 901        case ETHTOOL_GFLAGS:
 902        case ETHTOOL_GPFLAGS:
 903        case ETHTOOL_GRXFH:
 904                break;
 905        default:
 906                if (!capable(CAP_NET_ADMIN))
 907                        return -EPERM;
 908        }
 909
 910        if (dev->ethtool_ops->begin)
 911                if ((rc = dev->ethtool_ops->begin(dev)) < 0)
 912                        return rc;
 913
 914        old_features = dev->features;
 915
 916        switch (ethcmd) {
 917        case ETHTOOL_GSET:
 918                rc = ethtool_get_settings(dev, useraddr);
 919                break;
 920        case ETHTOOL_SSET:
 921                rc = ethtool_set_settings(dev, useraddr);
 922                break;
 923        case ETHTOOL_GDRVINFO:
 924                rc = ethtool_get_drvinfo(dev, useraddr);
 925                break;
 926        case ETHTOOL_GREGS:
 927                rc = ethtool_get_regs(dev, useraddr);
 928                break;
 929        case ETHTOOL_GWOL:
 930                rc = ethtool_get_wol(dev, useraddr);
 931                break;
 932        case ETHTOOL_SWOL:
 933                rc = ethtool_set_wol(dev, useraddr);
 934                break;
 935        case ETHTOOL_GMSGLVL:
 936                rc = ethtool_get_value(dev, useraddr, ethcmd,
 937                                       dev->ethtool_ops->get_msglevel);
 938                break;
 939        case ETHTOOL_SMSGLVL:
 940                rc = ethtool_set_value_void(dev, useraddr,
 941                                       dev->ethtool_ops->set_msglevel);
 942                break;
 943        case ETHTOOL_NWAY_RST:
 944                rc = ethtool_nway_reset(dev);
 945                break;
 946        case ETHTOOL_GLINK:
 947                rc = ethtool_get_value(dev, useraddr, ethcmd,
 948                                       dev->ethtool_ops->get_link);
 949                break;
 950        case ETHTOOL_GEEPROM:
 951                rc = ethtool_get_eeprom(dev, useraddr);
 952                break;
 953        case ETHTOOL_SEEPROM:
 954                rc = ethtool_set_eeprom(dev, useraddr);
 955                break;
 956        case ETHTOOL_GCOALESCE:
 957                rc = ethtool_get_coalesce(dev, useraddr);
 958                break;
 959        case ETHTOOL_SCOALESCE:
 960                rc = ethtool_set_coalesce(dev, useraddr);
 961                break;
 962        case ETHTOOL_GRINGPARAM:
 963                rc = ethtool_get_ringparam(dev, useraddr);
 964                break;
 965        case ETHTOOL_SRINGPARAM:
 966                rc = ethtool_set_ringparam(dev, useraddr);
 967                break;
 968        case ETHTOOL_GPAUSEPARAM:
 969                rc = ethtool_get_pauseparam(dev, useraddr);
 970                break;
 971        case ETHTOOL_SPAUSEPARAM:
 972                rc = ethtool_set_pauseparam(dev, useraddr);
 973                break;
 974        case ETHTOOL_GRXCSUM:
 975                rc = ethtool_get_value(dev, useraddr, ethcmd,
 976                                       dev->ethtool_ops->get_rx_csum);
 977                break;
 978        case ETHTOOL_SRXCSUM:
 979                rc = ethtool_set_rx_csum(dev, useraddr);
 980                break;
 981        case ETHTOOL_GTXCSUM:
 982                rc = ethtool_get_value(dev, useraddr, ethcmd,
 983                                       (dev->ethtool_ops->get_tx_csum ?
 984                                        dev->ethtool_ops->get_tx_csum :
 985                                        ethtool_op_get_tx_csum));
 986                break;
 987        case ETHTOOL_STXCSUM:
 988                rc = ethtool_set_tx_csum(dev, useraddr);
 989                break;
 990        case ETHTOOL_GSG:
 991                rc = ethtool_get_value(dev, useraddr, ethcmd,
 992                                       (dev->ethtool_ops->get_sg ?
 993                                        dev->ethtool_ops->get_sg :
 994                                        ethtool_op_get_sg));
 995                break;
 996        case ETHTOOL_SSG:
 997                rc = ethtool_set_sg(dev, useraddr);
 998                break;
 999        case ETHTOOL_GTSO:
1000                rc = ethtool_get_value(dev, useraddr, ethcmd,

1001                                       (dev->ethtool_ops->get_tso ?
1002                                        dev->ethtool_ops->get_tso :
1003                                        ethtool_op_get_tso));
1004                break;
1005        case ETHTOOL_STSO:
1006                rc = ethtool_set_tso(dev, useraddr);
1007                break;
1008        case ETHTOOL_TEST:
1009                rc = ethtool_self_test(dev, useraddr);
1010                break;
1011        case ETHTOOL_GSTRINGS:
1012                rc = ethtool_get_strings(dev, useraddr);
1013                break;
1014        case ETHTOOL_PHYS_ID:
1015                rc = ethtool_phys_id(dev, useraddr);
1016                break;
1017        case ETHTOOL_GSTATS:
1018                rc = ethtool_get_stats(dev, useraddr);
1019                break;
1020        case ETHTOOL_GPERMADDR:
1021                rc = ethtool_get_perm_addr(dev, useraddr);
1022                break;
1023        case ETHTOOL_GUFO:
1024                rc = ethtool_get_value(dev, useraddr, ethcmd,
1025                                       (dev->ethtool_ops->get_ufo ?
1026                                        dev->ethtool_ops->get_ufo :
1027                                        ethtool_op_get_ufo));
1028                break;
1029        case ETHTOOL_SUFO:
1030                rc = ethtool_set_ufo(dev, useraddr);
1031                break;
1032        case ETHTOOL_GGSO:
1033                rc = ethtool_get_gso(dev, useraddr);
1034                break;
1035        case ETHTOOL_SGSO:
1036                rc = ethtool_set_gso(dev, useraddr);
1037                break;
1038        case ETHTOOL_GFLAGS:
1039                rc = ethtool_get_value(dev, useraddr, ethcmd,
1040                                       dev->ethtool_ops->get_flags);
1041                break;
1042        case ETHTOOL_SFLAGS:
1043                rc = ethtool_set_value(dev, useraddr,
1044                                       dev->ethtool_ops->set_flags);
1045                break;
1046        case ETHTOOL_GPFLAGS:
1047                rc = ethtool_get_value(dev, useraddr, ethcmd,
1048                                       dev->ethtool_ops->get_priv_flags);
1049                break;
1050        case ETHTOOL_SPFLAGS:
1051                rc = ethtool_set_value(dev, useraddr,
1052                                       dev->ethtool_ops->set_priv_flags);
1053                break;
1054        case ETHTOOL_GRXFH:
1055                rc = ethtool_get_rxhash(dev, useraddr);
1056                break;
1057        case ETHTOOL_SRXFH:
1058                rc = ethtool_set_rxhash(dev, useraddr);
1059                break;
1060        case ETHTOOL_GGRO:
1061                rc = ethtool_get_gro(dev, useraddr);
1062                break;
1063        case ETHTOOL_SGRO:
1064                rc = ethtool_set_gro(dev, useraddr);
1065                break;
1066        default:
1067                rc = -EOPNOTSUPP;
1068        }
1069
1070        if (dev->ethtool_ops->complete)
1071                dev->ethtool_ops->complete(dev);
1072
1073        if (old_features != dev->features)
1074                netdev_features_change(dev);
1075
1076        return rc;
1077}
1078
1079EXPORT_SYMBOL(ethtool_op_get_link);
1080EXPORT_SYMBOL(ethtool_op_get_sg);
1081EXPORT_SYMBOL(ethtool_op_get_tso);
1082EXPORT_SYMBOL(ethtool_op_get_tx_csum);
1083EXPORT_SYMBOL(ethtool_op_set_sg);
1084EXPORT_SYMBOL(ethtool_op_set_tso);
1085EXPORT_SYMBOL(ethtool_op_set_tx_csum);
1086EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
1087EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
1088EXPORT_SYMBOL(ethtool_op_set_ufo);
1089EXPORT_SYMBOL(ethtool_op_get_ufo);
1090EXPORT_SYMBOL(ethtool_op_set_flags);
1091EXPORT_SYMBOL(ethtool_op_get_flags);
1092