Pileus Git - ~andy/linux/blob - 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 <linux/bitops.h>
  21 #include <linux/uaccess.h>
  22 #include <linux/vmalloc.h>
  23 #include <linux/slab.h>
  24 #include <linux/rtnetlink.h>
  25 #include <linux/sched.h>
  26
  27 /*
  28  * Some useful ethtool_ops methods that're device independent.
  29  * If we find that all drivers want to do the same thing here,
  30  * we can turn these into dev_() function calls.
  31  */
  32
  33 u32 ethtool_op_get_link(struct net_device *dev)
  34 {
  35         return netif_carrier_ok(dev) ? 1 : 0;
  36 }
  37 EXPORT_SYMBOL(ethtool_op_get_link);
  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 EXPORT_SYMBOL(ethtool_op_set_tx_csum);
  55
  56 int ethtool_op_set_tx_hw_csum(struct net_device *dev, u32 data)
  57 {
  58         if (data)
  59                 dev->features |= NETIF_F_HW_CSUM;
  60         else
  61                 dev->features &= ~NETIF_F_HW_CSUM;
  62
  63         return 0;
  64 }
  65 EXPORT_SYMBOL(ethtool_op_set_tx_hw_csum);
  66
  67 int ethtool_op_set_tx_ipv6_csum(struct net_device *dev, u32 data)
  68 {
  69         if (data)
  70                 dev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
  71         else
  72                 dev->features &= ~(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM);
  73
  74         return 0;
  75 }
  76 EXPORT_SYMBOL(ethtool_op_set_tx_ipv6_csum);
  77
  78 u32 ethtool_op_get_sg(struct net_device *dev)
  79 {
  80         return (dev->features & NETIF_F_SG) != 0;
  81 }
  82 EXPORT_SYMBOL(ethtool_op_get_sg);
  83
  84 int ethtool_op_set_sg(struct net_device *dev, u32 data)
  85 {
  86         if (data)
  87                 dev->features |= NETIF_F_SG;
  88         else
  89                 dev->features &= ~NETIF_F_SG;
  90
  91         return 0;
  92 }
  93 EXPORT_SYMBOL(ethtool_op_set_sg);
  94
  95 u32 ethtool_op_get_tso(struct net_device *dev)
  96 {
  97         return (dev->features & NETIF_F_TSO) != 0;
  98 }
  99 EXPORT_SYMBOL(ethtool_op_get_tso);
 100
 101 int ethtool_op_set_tso(struct net_device *dev, u32 data)
 102 {
 103         if (data)
 104                 dev->features |= NETIF_F_TSO;
 105         else
 106                 dev->features &= ~NETIF_F_TSO;
 107
 108         return 0;
 109 }
 110 EXPORT_SYMBOL(ethtool_op_set_tso);
 111
 112 u32 ethtool_op_get_ufo(struct net_device *dev)
 113 {
 114         return (dev->features & NETIF_F_UFO) != 0;
 115 }
 116 EXPORT_SYMBOL(ethtool_op_get_ufo);
 117
 118 int ethtool_op_set_ufo(struct net_device *dev, u32 data)
 119 {
 120         if (data)
 121                 dev->features |= NETIF_F_UFO;
 122         else
 123                 dev->features &= ~NETIF_F_UFO;
 124         return 0;
 125 }
 126 EXPORT_SYMBOL(ethtool_op_set_ufo);
 127
 128 /* the following list of flags are the same as their associated
 129  * NETIF_F_xxx values in include/linux/netdevice.h
 130  */
 131 static const u32 flags_dup_features =
 132         (ETH_FLAG_LRO | ETH_FLAG_RXVLAN | ETH_FLAG_TXVLAN | ETH_FLAG_NTUPLE |
 133          ETH_FLAG_RXHASH);
 134
 135 u32 ethtool_op_get_flags(struct net_device *dev)
 136 {
 137         /* in the future, this function will probably contain additional
 138          * handling for flags which are not so easily handled
 139          * by a simple masking operation
 140          */
 141
 142         return dev->features & flags_dup_features;
 143 }
 144 EXPORT_SYMBOL(ethtool_op_get_flags);
 145
 146 /* Check if device can enable (or disable) particular feature coded in "data"
 147  * argument. Flags "supported" describe features that can be toggled by device.
 148  * If feature can not be toggled, it state (enabled or disabled) must match
 149  * hardcoded device features state, otherwise flags are marked as invalid.
 150  */
 151 bool ethtool_invalid_flags(struct net_device *dev, u32 data, u32 supported)
 152 {
 153         u32 features = dev->features & flags_dup_features;
 154         /* "data" can contain only flags_dup_features bits,
 155          * see __ethtool_set_flags */
 156
 157         return (features & ~supported) != (data & ~supported);
 158 }
 159 EXPORT_SYMBOL(ethtool_invalid_flags);
 160
 161 int ethtool_op_set_flags(struct net_device *dev, u32 data, u32 supported)
 162 {
 163         if (ethtool_invalid_flags(dev, data, supported))
 164                 return -EINVAL;
 165
 166         dev->features = ((dev->features & ~flags_dup_features) |
 167                          (data & flags_dup_features));
 168         return 0;
 169 }
 170 EXPORT_SYMBOL(ethtool_op_set_flags);
 171
 172 void ethtool_ntuple_flush(struct net_device *dev)
 173 {
 174         struct ethtool_rx_ntuple_flow_spec_container *fsc, *f;
 175
 176         list_for_each_entry_safe(fsc, f, &dev->ethtool_ntuple_list.list, list) {
 177                 list_del(&fsc->list);
 178                 kfree(fsc);
 179         }
 180         dev->ethtool_ntuple_list.count = 0;
 181 }
 182 EXPORT_SYMBOL(ethtool_ntuple_flush);
 183
 184 /* Handlers for each ethtool command */
 185
 186 #define ETHTOOL_DEV_FEATURE_WORDS       1
 187
 188 static void ethtool_get_features_compat(struct net_device *dev,
 189         struct ethtool_get_features_block *features)
 190 {
 191         if (!dev->ethtool_ops)
 192                 return;
 193
 194         /* getting RX checksum */
 195         if (dev->ethtool_ops->get_rx_csum)
 196                 if (dev->ethtool_ops->get_rx_csum(dev))
 197                         features[0].active |= NETIF_F_RXCSUM;
 198
 199         /* mark legacy-changeable features */
 200         if (dev->ethtool_ops->set_sg)
 201                 features[0].available |= NETIF_F_SG;
 202         if (dev->ethtool_ops->set_tx_csum)
 203                 features[0].available |= NETIF_F_ALL_CSUM;
 204         if (dev->ethtool_ops->set_tso)
 205                 features[0].available |= NETIF_F_ALL_TSO;
 206         if (dev->ethtool_ops->set_rx_csum)
 207                 features[0].available |= NETIF_F_RXCSUM;
 208         if (dev->ethtool_ops->set_flags)
 209                 features[0].available |= flags_dup_features;
 210 }
 211
 212 static int ethtool_set_feature_compat(struct net_device *dev,
 213         int (*legacy_set)(struct net_device *, u32),
 214         struct ethtool_set_features_block *features, u32 mask)
 215 {
 216         u32 do_set;
 217
 218         if (!legacy_set)
 219                 return 0;
 220
 221         if (!(features[0].valid & mask))
 222                 return 0;
 223
 224         features[0].valid &= ~mask;
 225
 226         do_set = !!(features[0].requested & mask);
 227
 228         if (legacy_set(dev, do_set) < 0)
 229                 netdev_info(dev,
 230                         "Legacy feature change (%s) failed for 0x%08x\n",
 231                         do_set ? "set" : "clear", mask);
 232
 233         return 1;
 234 }
 235
 236 static int ethtool_set_flags_compat(struct net_device *dev,
 237         int (*legacy_set)(struct net_device *, u32),
 238         struct ethtool_set_features_block *features, u32 mask)
 239 {
 240         u32 value;
 241
 242         if (!legacy_set)
 243                 return 0;
 244
 245         if (!(features[0].valid & mask))
 246                 return 0;
 247
 248         value = dev->features & ~features[0].valid;
 249         value |= features[0].requested;
 250
 251         features[0].valid &= ~mask;
 252
 253         if (legacy_set(dev, value & mask) < 0)
 254                 netdev_info(dev, "Legacy flags change failed\n");
 255
 256         return 1;
 257 }
 258
 259 static int ethtool_set_features_compat(struct net_device *dev,
 260         struct ethtool_set_features_block *features)
 261 {
 262         int compat;
 263
 264         if (!dev->ethtool_ops)
 265                 return 0;
 266
 267         compat  = ethtool_set_feature_compat(dev, dev->ethtool_ops->set_sg,
 268                 features, NETIF_F_SG);
 269         compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tx_csum,
 270                 features, NETIF_F_ALL_CSUM);
 271         compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_tso,
 272                 features, NETIF_F_ALL_TSO);
 273         compat |= ethtool_set_feature_compat(dev, dev->ethtool_ops->set_rx_csum,
 274                 features, NETIF_F_RXCSUM);
 275         compat |= ethtool_set_flags_compat(dev, dev->ethtool_ops->set_flags,
 276                 features, flags_dup_features);
 277
 278         return compat;
 279 }
 280
 281 static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
 282 {
 283         struct ethtool_gfeatures cmd = {
 284                 .cmd = ETHTOOL_GFEATURES,
 285                 .size = ETHTOOL_DEV_FEATURE_WORDS,
 286         };
 287         struct ethtool_get_features_block features[ETHTOOL_DEV_FEATURE_WORDS] = {
 288                 {
 289                         .available = dev->hw_features,
 290                         .requested = dev->wanted_features,
 291                         .active = dev->features,
 292                         .never_changed = NETIF_F_NEVER_CHANGE,
 293                 },
 294         };
 295         u32 __user *sizeaddr;
 296         u32 copy_size;
 297
 298         ethtool_get_features_compat(dev, features);
 299
 300         sizeaddr = useraddr + offsetof(struct ethtool_gfeatures, size);
 301         if (get_user(copy_size, sizeaddr))
 302                 return -EFAULT;
 303
 304         if (copy_size > ETHTOOL_DEV_FEATURE_WORDS)
 305                 copy_size = ETHTOOL_DEV_FEATURE_WORDS;
 306
 307         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 308                 return -EFAULT;
 309         useraddr += sizeof(cmd);
 310         if (copy_to_user(useraddr, features, copy_size * sizeof(*features)))
 311                 return -EFAULT;
 312
 313         return 0;
 314 }
 315
 316 static int ethtool_set_features(struct net_device *dev, void __user *useraddr)
 317 {
 318         struct ethtool_sfeatures cmd;
 319         struct ethtool_set_features_block features[ETHTOOL_DEV_FEATURE_WORDS];
 320         int ret = 0;
 321
 322         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 323                 return -EFAULT;
 324         useraddr += sizeof(cmd);
 325
 326         if (cmd.size != ETHTOOL_DEV_FEATURE_WORDS)
 327                 return -EINVAL;
 328
 329         if (copy_from_user(features, useraddr, sizeof(features)))
 330                 return -EFAULT;
 331
 332         if (features[0].valid & ~NETIF_F_ETHTOOL_BITS)
 333                 return -EINVAL;
 334
 335         if (ethtool_set_features_compat(dev, features))
 336                 ret |= ETHTOOL_F_COMPAT;
 337
 338         if (features[0].valid & ~dev->hw_features) {
 339                 features[0].valid &= dev->hw_features;
 340                 ret |= ETHTOOL_F_UNSUPPORTED;
 341         }
 342
 343         dev->wanted_features &= ~features[0].valid;
 344         dev->wanted_features |= features[0].valid & features[0].requested;
 345         __netdev_update_features(dev);
 346
 347         if ((dev->wanted_features ^ dev->features) & features[0].valid)
 348                 ret |= ETHTOOL_F_WISH;
 349
 350         return ret;
 351 }
 352
 353 static const char netdev_features_strings[ETHTOOL_DEV_FEATURE_WORDS * 32][ETH_GSTRING_LEN] = {
 354         /* NETIF_F_SG */              "tx-scatter-gather",
 355         /* NETIF_F_IP_CSUM */         "tx-checksum-ipv4",
 356         /* NETIF_F_NO_CSUM */         "tx-checksum-unneeded",
 357         /* NETIF_F_HW_CSUM */         "tx-checksum-ip-generic",
 358         /* NETIF_F_IPV6_CSUM */       "tx-checksum-ipv6",
 359         /* NETIF_F_HIGHDMA */         "highdma",
 360         /* NETIF_F_FRAGLIST */        "tx-scatter-gather-fraglist",
 361         /* NETIF_F_HW_VLAN_TX */      "tx-vlan-hw-insert",
 362
 363         /* NETIF_F_HW_VLAN_RX */      "rx-vlan-hw-parse",
 364         /* NETIF_F_HW_VLAN_FILTER */  "rx-vlan-filter",
 365         /* NETIF_F_VLAN_CHALLENGED */ "vlan-challenged",
 366         /* NETIF_F_GSO */             "tx-generic-segmentation",
 367         /* NETIF_F_LLTX */            "tx-lockless",
 368         /* NETIF_F_NETNS_LOCAL */     "netns-local",
 369         /* NETIF_F_GRO */             "rx-gro",
 370         /* NETIF_F_LRO */             "rx-lro",
 371
 372         /* NETIF_F_TSO */             "tx-tcp-segmentation",
 373         /* NETIF_F_UFO */             "tx-udp-fragmentation",
 374         /* NETIF_F_GSO_ROBUST */      "tx-gso-robust",
 375         /* NETIF_F_TSO_ECN */         "tx-tcp-ecn-segmentation",
 376         /* NETIF_F_TSO6 */            "tx-tcp6-segmentation",
 377         /* NETIF_F_FSO */             "tx-fcoe-segmentation",
 378         "",
 379         "",
 380
 381         /* NETIF_F_FCOE_CRC */        "tx-checksum-fcoe-crc",
 382         /* NETIF_F_SCTP_CSUM */       "tx-checksum-sctp",
 383         /* NETIF_F_FCOE_MTU */        "fcoe-mtu",
 384         /* NETIF_F_NTUPLE */          "rx-ntuple-filter",
 385         /* NETIF_F_RXHASH */          "rx-hashing",
 386         /* NETIF_F_RXCSUM */          "rx-checksum",
 387         /* NETIF_F_NOCACHE_COPY */    "tx-nocache-copy",
 388         /* NETIF_F_LOOPBACK */        "loopback",
 389 };
 390
 391 static int __ethtool_get_sset_count(struct net_device *dev, int sset)
 392 {
 393         const struct ethtool_ops *ops = dev->ethtool_ops;
 394
 395         if (sset == ETH_SS_FEATURES)
 396                 return ARRAY_SIZE(netdev_features_strings);
 397
 398         if (ops && ops->get_sset_count && ops->get_strings)
 399                 return ops->get_sset_count(dev, sset);
 400         else
 401                 return -EOPNOTSUPP;
 402 }
 403
 404 static void __ethtool_get_strings(struct net_device *dev,
 405         u32 stringset, u8 *data)
 406 {
 407         const struct ethtool_ops *ops = dev->ethtool_ops;
 408
 409         if (stringset == ETH_SS_FEATURES)
 410                 memcpy(data, netdev_features_strings,
 411                         sizeof(netdev_features_strings));
 412         else
 413                 /* ops->get_strings is valid because checked earlier */
 414                 ops->get_strings(dev, stringset, data);
 415 }
 416
 417 static u32 ethtool_get_feature_mask(u32 eth_cmd)
 418 {
 419         /* feature masks of legacy discrete ethtool ops */
 420
 421         switch (eth_cmd) {
 422         case ETHTOOL_GTXCSUM:
 423         case ETHTOOL_STXCSUM:
 424                 return NETIF_F_ALL_CSUM | NETIF_F_SCTP_CSUM;
 425         case ETHTOOL_GRXCSUM:
 426         case ETHTOOL_SRXCSUM:
 427                 return NETIF_F_RXCSUM;
 428         case ETHTOOL_GSG:
 429         case ETHTOOL_SSG:
 430                 return NETIF_F_SG;
 431         case ETHTOOL_GTSO:
 432         case ETHTOOL_STSO:
 433                 return NETIF_F_ALL_TSO;
 434         case ETHTOOL_GUFO:
 435         case ETHTOOL_SUFO:
 436                 return NETIF_F_UFO;
 437         case ETHTOOL_GGSO:
 438         case ETHTOOL_SGSO:
 439                 return NETIF_F_GSO;
 440         case ETHTOOL_GGRO:
 441         case ETHTOOL_SGRO:
 442                 return NETIF_F_GRO;
 443         default:
 444                 BUG();
 445         }
 446 }
 447
 448 static void *__ethtool_get_one_feature_actor(struct net_device *dev, u32 ethcmd)
 449 {
 450         const struct ethtool_ops *ops = dev->ethtool_ops;
 451
 452         if (!ops)
 453                 return NULL;
 454
 455         switch (ethcmd) {
 456         case ETHTOOL_GTXCSUM:
 457                 return ops->get_tx_csum;
 458         case ETHTOOL_GRXCSUM:
 459                 return ops->get_rx_csum;
 460         case ETHTOOL_SSG:
 461                 return ops->get_sg;
 462         case ETHTOOL_STSO:
 463                 return ops->get_tso;
 464         case ETHTOOL_SUFO:
 465                 return ops->get_ufo;
 466         default:
 467                 return NULL;
 468         }
 469 }
 470
 471 static u32 __ethtool_get_rx_csum_oldbug(struct net_device *dev)
 472 {
 473         return !!(dev->features & NETIF_F_ALL_CSUM);
 474 }
 475
 476 static int ethtool_get_one_feature(struct net_device *dev,
 477         char __user *useraddr, u32 ethcmd)
 478 {
 479         u32 mask = ethtool_get_feature_mask(ethcmd);
 480         struct ethtool_value edata = {
 481                 .cmd = ethcmd,
 482                 .data = !!(dev->features & mask),
 483         };
 484
 485         /* compatibility with discrete get_ ops */
 486         if (!(dev->hw_features & mask)) {
 487                 u32 (*actor)(struct net_device *);
 488
 489                 actor = __ethtool_get_one_feature_actor(dev, ethcmd);
 490
 491                 /* bug compatibility with old get_rx_csum */
 492                 if (ethcmd == ETHTOOL_GRXCSUM && !actor)
 493                         actor = __ethtool_get_rx_csum_oldbug;
 494
 495                 if (actor)
 496                         edata.data = actor(dev);
 497         }
 498
 499         if (copy_to_user(useraddr, &edata, sizeof(edata)))
 500                 return -EFAULT;
 501         return 0;
 502 }
 503
 504 static int __ethtool_set_tx_csum(struct net_device *dev, u32 data);
 505 static int __ethtool_set_rx_csum(struct net_device *dev, u32 data);
 506 static int __ethtool_set_sg(struct net_device *dev, u32 data);
 507 static int __ethtool_set_tso(struct net_device *dev, u32 data);
 508 static int __ethtool_set_ufo(struct net_device *dev, u32 data);
 509
 510 static int ethtool_set_one_feature(struct net_device *dev,
 511         void __user *useraddr, u32 ethcmd)
 512 {
 513         struct ethtool_value edata;
 514         u32 mask;
 515
 516         if (copy_from_user(&edata, useraddr, sizeof(edata)))
 517                 return -EFAULT;
 518
 519         mask = ethtool_get_feature_mask(ethcmd);
 520         mask &= dev->hw_features;
 521         if (mask) {
 522                 if (edata.data)
 523                         dev->wanted_features |= mask;
 524                 else
 525                         dev->wanted_features &= ~mask;
 526
 527                 __netdev_update_features(dev);
 528                 return 0;
 529         }
 530
 531         /* Driver is not converted to ndo_fix_features or does not
 532          * support changing this offload. In the latter case it won't
 533          * have corresponding ethtool_ops field set.
 534          *
 535          * Following part is to be removed after all drivers advertise
 536          * their changeable features in netdev->hw_features and stop
 537          * using discrete offload setting ops.
 538          */
 539
 540         switch (ethcmd) {
 541         case ETHTOOL_STXCSUM:
 542                 return __ethtool_set_tx_csum(dev, edata.data);
 543         case ETHTOOL_SRXCSUM:
 544                 return __ethtool_set_rx_csum(dev, edata.data);
 545         case ETHTOOL_SSG:
 546                 return __ethtool_set_sg(dev, edata.data);
 547         case ETHTOOL_STSO:
 548                 return __ethtool_set_tso(dev, edata.data);
 549         case ETHTOOL_SUFO:
 550                 return __ethtool_set_ufo(dev, edata.data);
 551         default:
 552                 return -EOPNOTSUPP;
 553         }
 554 }
 555
 556 int __ethtool_set_flags(struct net_device *dev, u32 data)
 557 {
 558         u32 changed;
 559
 560         if (data & ~flags_dup_features)
 561                 return -EINVAL;
 562
 563         /* legacy set_flags() op */
 564         if (dev->ethtool_ops->set_flags) {
 565                 if (unlikely(dev->hw_features & flags_dup_features))
 566                         netdev_warn(dev,
 567                                 "driver BUG: mixed hw_features and set_flags()\n");
 568                 return dev->ethtool_ops->set_flags(dev, data);
 569         }
 570
 571         /* allow changing only bits set in hw_features */
 572         changed = (data ^ dev->features) & flags_dup_features;
 573         if (changed & ~dev->hw_features)
 574                 return (changed & dev->hw_features) ? -EINVAL : -EOPNOTSUPP;
 575
 576         dev->wanted_features =
 577                 (dev->wanted_features & ~changed) | (data & dev->hw_features);
 578
 579         __netdev_update_features(dev);
 580
 581         return 0;
 582 }
 583
 584 static int ethtool_get_settings(struct net_device *dev, void __user *useraddr)
 585 {
 586         struct ethtool_cmd cmd = { .cmd = ETHTOOL_GSET };
 587         int err;
 588
 589         if (!dev->ethtool_ops->get_settings)
 590                 return -EOPNOTSUPP;
 591
 592         err = dev->ethtool_ops->get_settings(dev, &cmd);
 593         if (err < 0)
 594                 return err;
 595
 596         if (copy_to_user(useraddr, &cmd, sizeof(cmd)))
 597                 return -EFAULT;
 598         return 0;
 599 }
 600
 601 static int ethtool_set_settings(struct net_device *dev, void __user *useraddr)
 602 {
 603         struct ethtool_cmd cmd;
 604
 605         if (!dev->ethtool_ops->set_settings)
 606                 return -EOPNOTSUPP;
 607
 608         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 609                 return -EFAULT;
 610
 611         return dev->ethtool_ops->set_settings(dev, &cmd);
 612 }
 613
 614 static noinline_for_stack int ethtool_get_drvinfo(struct net_device *dev,
 615                                                   void __user *useraddr)
 616 {
 617         struct ethtool_drvinfo info;
 618         const struct ethtool_ops *ops = dev->ethtool_ops;
 619
 620         memset(&info, 0, sizeof(info));
 621         info.cmd = ETHTOOL_GDRVINFO;
 622         if (ops && ops->get_drvinfo) {
 623                 ops->get_drvinfo(dev, &info);
 624         } else if (dev->dev.parent && dev->dev.parent->driver) {
 625                 strlcpy(info.bus_info, dev_name(dev->dev.parent),
 626                         sizeof(info.bus_info));
 627                 strlcpy(info.driver, dev->dev.parent->driver->name,
 628                         sizeof(info.driver));
 629         } else {
 630                 return -EOPNOTSUPP;
 631         }
 632
 633         /*
 634          * this method of obtaining string set info is deprecated;
 635          * Use ETHTOOL_GSSET_INFO instead.
 636          */
 637         if (ops && ops->get_sset_count) {
 638                 int rc;
 639
 640                 rc = ops->get_sset_count(dev, ETH_SS_TEST);
 641                 if (rc >= 0)
 642                         info.testinfo_len = rc;
 643                 rc = ops->get_sset_count(dev, ETH_SS_STATS);
 644                 if (rc >= 0)
 645                         info.n_stats = rc;
 646                 rc = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
 647                 if (rc >= 0)
 648                         info.n_priv_flags = rc;
 649         }
 650         if (ops && ops->get_regs_len)
 651                 info.regdump_len = ops->get_regs_len(dev);
 652         if (ops && ops->get_eeprom_len)
 653                 info.eedump_len = ops->get_eeprom_len(dev);
 654
 655         if (copy_to_user(useraddr, &info, sizeof(info)))
 656                 return -EFAULT;
 657         return 0;
 658 }
 659
 660 static noinline_for_stack int ethtool_get_sset_info(struct net_device *dev,
 661                                                     void __user *useraddr)
 662 {
 663         struct ethtool_sset_info info;
 664         u64 sset_mask;
 665         int i, idx = 0, n_bits = 0, ret, rc;
 666         u32 *info_buf = NULL;
 667
 668         if (copy_from_user(&info, useraddr, sizeof(info)))
 669                 return -EFAULT;
 670
 671         /* store copy of mask, because we zero struct later on */
 672         sset_mask = info.sset_mask;
 673         if (!sset_mask)
 674                 return 0;
 675
 676         /* calculate size of return buffer */
 677         n_bits = hweight64(sset_mask);
 678
 679         memset(&info, 0, sizeof(info));
 680         info.cmd = ETHTOOL_GSSET_INFO;
 681
 682         info_buf = kzalloc(n_bits * sizeof(u32), GFP_USER);
 683         if (!info_buf)
 684                 return -ENOMEM;
 685
 686         /*
 687          * fill return buffer based on input bitmask and successful
 688          * get_sset_count return
 689          */
 690         for (i = 0; i < 64; i++) {
 691                 if (!(sset_mask & (1ULL << i)))
 692                         continue;
 693
 694                 rc = __ethtool_get_sset_count(dev, i);
 695                 if (rc >= 0) {
 696                         info.sset_mask |= (1ULL << i);
 697                         info_buf[idx++] = rc;
 698                 }
 699         }
 700
 701         ret = -EFAULT;
 702         if (copy_to_user(useraddr, &info, sizeof(info)))
 703                 goto out;
 704
 705         useraddr += offsetof(struct ethtool_sset_info, data);
 706         if (copy_to_user(useraddr, info_buf, idx * sizeof(u32)))
 707                 goto out;
 708
 709         ret = 0;
 710
 711 out:
 712         kfree(info_buf);
 713         return ret;
 714 }
 715
 716 static noinline_for_stack int ethtool_set_rxnfc(struct net_device *dev,
 717                                                 u32 cmd, void __user *useraddr)
 718 {
 719         struct ethtool_rxnfc info;
 720         size_t info_size = sizeof(info);
 721
 722         if (!dev->ethtool_ops->set_rxnfc)
 723                 return -EOPNOTSUPP;
 724
 725         /* struct ethtool_rxnfc was originally defined for
 726          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 727          * members.  User-space might still be using that
 728          * definition. */
 729         if (cmd == ETHTOOL_SRXFH)
 730                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 731                              sizeof(info.data));
 732
 733         if (copy_from_user(&info, useraddr, info_size))
 734                 return -EFAULT;
 735
 736         return dev->ethtool_ops->set_rxnfc(dev, &info);
 737 }
 738
 739 static noinline_for_stack int ethtool_get_rxnfc(struct net_device *dev,
 740                                                 u32 cmd, void __user *useraddr)
 741 {
 742         struct ethtool_rxnfc info;
 743         size_t info_size = sizeof(info);
 744         const struct ethtool_ops *ops = dev->ethtool_ops;
 745         int ret;
 746         void *rule_buf = NULL;
 747
 748         if (!ops->get_rxnfc)
 749                 return -EOPNOTSUPP;
 750
 751         /* struct ethtool_rxnfc was originally defined for
 752          * ETHTOOL_{G,S}RXFH with only the cmd, flow_type and data
 753          * members.  User-space might still be using that
 754          * definition. */
 755         if (cmd == ETHTOOL_GRXFH)
 756                 info_size = (offsetof(struct ethtool_rxnfc, data) +
 757                              sizeof(info.data));
 758
 759         if (copy_from_user(&info, useraddr, info_size))
 760                 return -EFAULT;
 761
 762         if (info.cmd == ETHTOOL_GRXCLSRLALL) {
 763                 if (info.rule_cnt > 0) {
 764                         if (info.rule_cnt <= KMALLOC_MAX_SIZE / sizeof(u32))
 765                                 rule_buf = kzalloc(info.rule_cnt * sizeof(u32),
 766                                                    GFP_USER);
 767                         if (!rule_buf)
 768                                 return -ENOMEM;
 769                 }
 770         }
 771
 772         ret = ops->get_rxnfc(dev, &info, rule_buf);
 773         if (ret < 0)
 774                 goto err_out;
 775
 776         ret = -EFAULT;
 777         if (copy_to_user(useraddr, &info, info_size))
 778                 goto err_out;
 779
 780         if (rule_buf) {
 781                 useraddr += offsetof(struct ethtool_rxnfc, rule_locs);
 782                 if (copy_to_user(useraddr, rule_buf,
 783                                  info.rule_cnt * sizeof(u32)))
 784                         goto err_out;
 785         }
 786         ret = 0;
 787
 788 err_out:
 789         kfree(rule_buf);
 790
 791         return ret;
 792 }
 793
 794 static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
 795                                                      void __user *useraddr)
 796 {
 797         struct ethtool_rxfh_indir *indir;
 798         u32 table_size;
 799         size_t full_size;
 800         int ret;
 801
 802         if (!dev->ethtool_ops->get_rxfh_indir)
 803                 return -EOPNOTSUPP;
 804
 805         if (copy_from_user(&table_size,
 806                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 807                            sizeof(table_size)))
 808                 return -EFAULT;
 809
 810         if (table_size >
 811             (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
 812                 return -ENOMEM;
 813         full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
 814         indir = kzalloc(full_size, GFP_USER);
 815         if (!indir)
 816                 return -ENOMEM;
 817
 818         indir->cmd = ETHTOOL_GRXFHINDIR;
 819         indir->size = table_size;
 820         ret = dev->ethtool_ops->get_rxfh_indir(dev, indir);
 821         if (ret)
 822                 goto out;
 823
 824         if (copy_to_user(useraddr, indir, full_size))
 825                 ret = -EFAULT;
 826
 827 out:
 828         kfree(indir);
 829         return ret;
 830 }
 831
 832 static noinline_for_stack int ethtool_set_rxfh_indir(struct net_device *dev,
 833                                                      void __user *useraddr)
 834 {
 835         struct ethtool_rxfh_indir *indir;
 836         u32 table_size;
 837         size_t full_size;
 838         int ret;
 839
 840         if (!dev->ethtool_ops->set_rxfh_indir)
 841                 return -EOPNOTSUPP;
 842
 843         if (copy_from_user(&table_size,
 844                            useraddr + offsetof(struct ethtool_rxfh_indir, size),
 845                            sizeof(table_size)))
 846                 return -EFAULT;
 847
 848         if (table_size >
 849             (KMALLOC_MAX_SIZE - sizeof(*indir)) / sizeof(*indir->ring_index))
 850                 return -ENOMEM;
 851         full_size = sizeof(*indir) + sizeof(*indir->ring_index) * table_size;
 852         indir = kmalloc(full_size, GFP_USER);
 853         if (!indir)
 854                 return -ENOMEM;
 855
 856         if (copy_from_user(indir, useraddr, full_size)) {
 857                 ret = -EFAULT;
 858                 goto out;
 859         }
 860
 861         ret = dev->ethtool_ops->set_rxfh_indir(dev, indir);
 862
 863 out:
 864         kfree(indir);
 865         return ret;
 866 }
 867
 868 static void __rx_ntuple_filter_add(struct ethtool_rx_ntuple_list *list,
 869                         struct ethtool_rx_ntuple_flow_spec *spec,
 870                         struct ethtool_rx_ntuple_flow_spec_container *fsc)
 871 {
 872
 873         /* don't add filters forever */
 874         if (list->count >= ETHTOOL_MAX_NTUPLE_LIST_ENTRY) {
 875                 /* free the container */
 876                 kfree(fsc);
 877                 return;
 878         }
 879
 880         /* Copy the whole filter over */
 881         fsc->fs.flow_type = spec->flow_type;
 882         memcpy(&fsc->fs.h_u, &spec->h_u, sizeof(spec->h_u));
 883         memcpy(&fsc->fs.m_u, &spec->m_u, sizeof(spec->m_u));
 884
 885         fsc->fs.vlan_tag = spec->vlan_tag;
 886         fsc->fs.vlan_tag_mask = spec->vlan_tag_mask;
 887         fsc->fs.data = spec->data;
 888         fsc->fs.data_mask = spec->data_mask;
 889         fsc->fs.action = spec->action;
 890
 891         /* add to the list */
 892         list_add_tail_rcu(&fsc->list, &list->list);
 893         list->count++;
 894 }
 895
 896 /*
 897  * ethtool does not (or did not) set masks for flow parameters that are
 898  * not specified, so if both value and mask are 0 then this must be
 899  * treated as equivalent to a mask with all bits set.  Implement that
 900  * here rather than in drivers.
 901  */
 902 static void rx_ntuple_fix_masks(struct ethtool_rx_ntuple_flow_spec *fs)
 903 {
 904         struct ethtool_tcpip4_spec *entry = &fs->h_u.tcp_ip4_spec;
 905         struct ethtool_tcpip4_spec *mask = &fs->m_u.tcp_ip4_spec;
 906
 907         if (fs->flow_type != TCP_V4_FLOW &&
 908             fs->flow_type != UDP_V4_FLOW &&
 909             fs->flow_type != SCTP_V4_FLOW)
 910                 return;
 911
 912         if (!(entry->ip4src | mask->ip4src))
 913                 mask->ip4src = htonl(0xffffffff);
 914         if (!(entry->ip4dst | mask->ip4dst))
 915                 mask->ip4dst = htonl(0xffffffff);
 916         if (!(entry->psrc | mask->psrc))
 917                 mask->psrc = htons(0xffff);
 918         if (!(entry->pdst | mask->pdst))
 919                 mask->pdst = htons(0xffff);
 920         if (!(entry->tos | mask->tos))
 921                 mask->tos = 0xff;
 922         if (!(fs->vlan_tag | fs->vlan_tag_mask))
 923                 fs->vlan_tag_mask = 0xffff;
 924         if (!(fs->data | fs->data_mask))
 925                 fs->data_mask = 0xffffffffffffffffULL;
 926 }
 927
 928 static noinline_for_stack int ethtool_set_rx_ntuple(struct net_device *dev,
 929                                                     void __user *useraddr)
 930 {
 931         struct ethtool_rx_ntuple cmd;
 932         const struct ethtool_ops *ops = dev->ethtool_ops;
 933         struct ethtool_rx_ntuple_flow_spec_container *fsc = NULL;
 934         int ret;
 935
 936         if (!ops->set_rx_ntuple)
 937                 return -EOPNOTSUPP;
 938
 939         if (!(dev->features & NETIF_F_NTUPLE))
 940                 return -EINVAL;
 941
 942         if (copy_from_user(&cmd, useraddr, sizeof(cmd)))
 943                 return -EFAULT;
 944
 945         rx_ntuple_fix_masks(&cmd.fs);
 946
 947         /*
 948          * Cache filter in dev struct for GET operation only if
 949          * the underlying driver doesn't have its own GET operation, and
 950          * only if the filter was added successfully.  First make sure we
 951          * can allocate the filter, then continue if successful.
 952          */
 953         if (!ops->get_rx_ntuple) {
 954                 fsc = kmalloc(sizeof(*fsc), GFP_ATOMIC);
 955                 if (!fsc)
 956                         return -ENOMEM;
 957         }
 958
 959         ret = ops->set_rx_ntuple(dev, &cmd);
 960         if (ret) {
 961                 kfree(fsc);
 962                 return ret;
 963         }
 964
 965         if (!ops->get_rx_ntuple)
 966                 __rx_ntuple_filter_add(&dev->ethtool_ntuple_list, &cmd.fs, fsc);
 967
 968         return ret;
 969 }
 970
 971 static int ethtool_get_rx_ntuple(struct net_device *dev, void __user *useraddr)
 972 {
 973         struct ethtool_gstrings gstrings;
 974         const struct ethtool_ops *ops = dev->ethtool_ops;
 975         struct ethtool_rx_ntuple_flow_spec_container *fsc;
 976         u8 *data;
 977         char *p;
 978         int ret, i, num_strings = 0;
 979
 980         if (!ops->get_sset_count)
 981                 return -EOPNOTSUPP;
 982
 983         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
 984                 return -EFAULT;
 985
 986         ret = ops->get_sset_count(dev, gstrings.string_set);
 987         if (ret < 0)
 988                 return ret;
 989
 990         gstrings.len = ret;
 991
 992         data = kzalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
 993         if (!data)
 994                 return -ENOMEM;
 995
 996         if (ops->get_rx_ntuple) {
 997                 /* driver-specific filter grab */
 998                 ret = ops->get_rx_ntuple(dev, gstrings.string_set, data);
 999                 goto copy;
1000         }
1001
1002         /* default ethtool filter grab */
1003         i = 0;
1004         p = (char *)data;
1005         list_for_each_entry(fsc, &dev->ethtool_ntuple_list.list, list) {
1006                 sprintf(p, "Filter %d:\n", i);
1007                 p += ETH_GSTRING_LEN;
1008                 num_strings++;
1009
1010                 switch (fsc->fs.flow_type) {
1011                 case TCP_V4_FLOW:
1012                         sprintf(p, "\tFlow Type: TCP\n");
1013                         p += ETH_GSTRING_LEN;
1014                         num_strings++;
1015                         break;
1016                 case UDP_V4_FLOW:
1017                         sprintf(p, "\tFlow Type: UDP\n");
1018                         p += ETH_GSTRING_LEN;
1019                         num_strings++;
1020                         break;
1021                 case SCTP_V4_FLOW:
1022                         sprintf(p, "\tFlow Type: SCTP\n");
1023                         p += ETH_GSTRING_LEN;
1024                         num_strings++;
1025                         break;
1026                 case AH_ESP_V4_FLOW:
1027                         sprintf(p, "\tFlow Type: AH ESP\n");
1028                         p += ETH_GSTRING_LEN;
1029                         num_strings++;
1030                         break;
1031                 case ESP_V4_FLOW:
1032                         sprintf(p, "\tFlow Type: ESP\n");
1033                         p += ETH_GSTRING_LEN;
1034                         num_strings++;
1035                         break;
1036                 case IP_USER_FLOW:
1037                         sprintf(p, "\tFlow Type: Raw IP\n");
1038                         p += ETH_GSTRING_LEN;
1039                         num_strings++;
1040                         break;
1041                 case IPV4_FLOW:
1042                         sprintf(p, "\tFlow Type: IPv4\n");
1043                         p += ETH_GSTRING_LEN;
1044                         num_strings++;
1045                         break;
1046                 default:
1047                         sprintf(p, "\tFlow Type: Unknown\n");
1048                         p += ETH_GSTRING_LEN;
1049                         num_strings++;
1050                         goto unknown_filter;
1051                 }
1052
1053                 /* now the rest of the filters */
1054                 switch (fsc->fs.flow_type) {
1055                 case TCP_V4_FLOW:
1056                 case UDP_V4_FLOW:
1057                 case SCTP_V4_FLOW:
1058                         sprintf(p, "\tSrc IP addr: 0x%x\n",
1059                                 fsc->fs.h_u.tcp_ip4_spec.ip4src);
1060                         p += ETH_GSTRING_LEN;
1061                         num_strings++;
1062                         sprintf(p, "\tSrc IP mask: 0x%x\n",
1063                                 fsc->fs.m_u.tcp_ip4_spec.ip4src);
1064                         p += ETH_GSTRING_LEN;
1065                         num_strings++;
1066                         sprintf(p, "\tDest IP addr: 0x%x\n",
1067                                 fsc->fs.h_u.tcp_ip4_spec.ip4dst);
1068                         p += ETH_GSTRING_LEN;
1069                         num_strings++;
1070                         sprintf(p, "\tDest IP mask: 0x%x\n",
1071                                 fsc->fs.m_u.tcp_ip4_spec.ip4dst);
1072                         p += ETH_GSTRING_LEN;
1073                         num_strings++;
1074                         sprintf(p, "\tSrc Port: %d, mask: 0x%x\n",
1075                                 fsc->fs.h_u.tcp_ip4_spec.psrc,
1076                                 fsc->fs.m_u.tcp_ip4_spec.psrc);
1077                         p += ETH_GSTRING_LEN;
1078                         num_strings++;
1079                         sprintf(p, "\tDest Port: %d, mask: 0x%x\n",
1080                                 fsc->fs.h_u.tcp_ip4_spec.pdst,
1081                                 fsc->fs.m_u.tcp_ip4_spec.pdst);
1082                         p += ETH_GSTRING_LEN;
1083                         num_strings++;
1084                         sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1085                                 fsc->fs.h_u.tcp_ip4_spec.tos,
1086                                 fsc->fs.m_u.tcp_ip4_spec.tos);
1087                         p += ETH_GSTRING_LEN;
1088                         num_strings++;
1089                         break;
1090                 case AH_ESP_V4_FLOW:
1091                 case ESP_V4_FLOW:
1092                         sprintf(p, "\tSrc IP addr: 0x%x\n",
1093                                 fsc->fs.h_u.ah_ip4_spec.ip4src);
1094                         p += ETH_GSTRING_LEN;
1095                         num_strings++;
1096                         sprintf(p, "\tSrc IP mask: 0x%x\n",
1097                                 fsc->fs.m_u.ah_ip4_spec.ip4src);
1098                         p += ETH_GSTRING_LEN;
1099                         num_strings++;
1100                         sprintf(p, "\tDest IP addr: 0x%x\n",
1101                                 fsc->fs.h_u.ah_ip4_spec.ip4dst);
1102                         p += ETH_GSTRING_LEN;
1103                         num_strings++;
1104                         sprintf(p, "\tDest IP mask: 0x%x\n",
1105                                 fsc->fs.m_u.ah_ip4_spec.ip4dst);
1106                         p += ETH_GSTRING_LEN;
1107                         num_strings++;
1108                         sprintf(p, "\tSPI: %d, mask: 0x%x\n",
1109                                 fsc->fs.h_u.ah_ip4_spec.spi,
1110                                 fsc->fs.m_u.ah_ip4_spec.spi);
1111                         p += ETH_GSTRING_LEN;
1112                         num_strings++;
1113                         sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1114                                 fsc->fs.h_u.ah_ip4_spec.tos,
1115                                 fsc->fs.m_u.ah_ip4_spec.tos);
1116                         p += ETH_GSTRING_LEN;
1117                         num_strings++;
1118                         break;
1119                 case IP_USER_FLOW:
1120                         sprintf(p, "\tSrc IP addr: 0x%x\n",
1121                                 fsc->fs.h_u.usr_ip4_spec.ip4src);
1122                         p += ETH_GSTRING_LEN;
1123                         num_strings++;
1124                         sprintf(p, "\tSrc IP mask: 0x%x\n",
1125                                 fsc->fs.m_u.usr_ip4_spec.ip4src);
1126                         p += ETH_GSTRING_LEN;
1127                         num_strings++;
1128                         sprintf(p, "\tDest IP addr: 0x%x\n",
1129                                 fsc->fs.h_u.usr_ip4_spec.ip4dst);
1130                         p += ETH_GSTRING_LEN;
1131                         num_strings++;
1132                         sprintf(p, "\tDest IP mask: 0x%x\n",
1133                                 fsc->fs.m_u.usr_ip4_spec.ip4dst);
1134                         p += ETH_GSTRING_LEN;
1135                         num_strings++;
1136                         break;
1137                 case IPV4_FLOW:
1138                         sprintf(p, "\tSrc IP addr: 0x%x\n",
1139                                 fsc->fs.h_u.usr_ip4_spec.ip4src);
1140                         p += ETH_GSTRING_LEN;
1141                         num_strings++;
1142                         sprintf(p, "\tSrc IP mask: 0x%x\n",
1143                                 fsc->fs.m_u.usr_ip4_spec.ip4src);
1144                         p += ETH_GSTRING_LEN;
1145                         num_strings++;
1146                         sprintf(p, "\tDest IP addr: 0x%x\n",
1147                                 fsc->fs.h_u.usr_ip4_spec.ip4dst);
1148                         p += ETH_GSTRING_LEN;
1149                         num_strings++;
1150                         sprintf(p, "\tDest IP mask: 0x%x\n",
1151                                 fsc->fs.m_u.usr_ip4_spec.ip4dst);
1152                         p += ETH_GSTRING_LEN;
1153                         num_strings++;
1154                         sprintf(p, "\tL4 bytes: 0x%x, mask: 0x%x\n",
1155                                 fsc->fs.h_u.usr_ip4_spec.l4_4_bytes,
1156                                 fsc->fs.m_u.usr_ip4_spec.l4_4_bytes);
1157                         p += ETH_GSTRING_LEN;
1158                         num_strings++;
1159                         sprintf(p, "\tTOS: %d, mask: 0x%x\n",
1160                                 fsc->fs.h_u.usr_ip4_spec.tos,
1161                                 fsc->fs.m_u.usr_ip4_spec.tos);
1162                         p += ETH_GSTRING_LEN;
1163                         num_strings++;
1164                         sprintf(p, "\tIP Version: %d, mask: 0x%x\n",
1165                                 fsc->fs.h_u.usr_ip4_spec.ip_ver,
1166                                 fsc->fs.m_u.usr_ip4_spec.ip_ver);
1167                         p += ETH_GSTRING_LEN;
1168                         num_strings++;
1169                         sprintf(p, "\tProtocol: %d, mask: 0x%x\n",
1170                                 fsc->fs.h_u.usr_ip4_spec.proto,
1171                                 fsc->fs.m_u.usr_ip4_spec.proto);
1172                         p += ETH_GSTRING_LEN;
1173                         num_strings++;
1174                         break;
1175                 }
1176                 sprintf(p, "\tVLAN: %d, mask: 0x%x\n",
1177                         fsc->fs.vlan_tag, fsc->fs.vlan_tag_mask);
1178                 p += ETH_GSTRING_LEN;
1179                 num_strings++;
1180                 sprintf(p, "\tUser-defined: 0x%Lx\n", fsc->fs.data);
1181                 p += ETH_GSTRING_LEN;
1182                 num_strings++;
1183                 sprintf(p, "\tUser-defined mask: 0x%Lx\n", fsc->fs.data_mask);
1184                 p += ETH_GSTRING_LEN;
1185                 num_strings++;
1186                 if (fsc->fs.action == ETHTOOL_RXNTUPLE_ACTION_DROP)
1187                         sprintf(p, "\tAction: Drop\n");
1188                 else
1189                         sprintf(p, "\tAction: Direct to queue %d\n",
1190                                 fsc->fs.action);
1191                 p += ETH_GSTRING_LEN;
1192                 num_strings++;
1193 unknown_filter:
1194                 i++;
1195         }
1196 copy:
1197         /* indicate to userspace how many strings we actually have */
1198         gstrings.len = num_strings;
1199         ret = -EFAULT;
1200         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1201                 goto out;
1202         useraddr += sizeof(gstrings);
1203         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1204                 goto out;
1205         ret = 0;
1206
1207 out:
1208         kfree(data);
1209         return ret;
1210 }
1211
1212 static int ethtool_get_regs(struct net_device *dev, char __user *useraddr)
1213 {
1214         struct ethtool_regs regs;
1215         const struct ethtool_ops *ops = dev->ethtool_ops;
1216         void *regbuf;
1217         int reglen, ret;
1218
1219         if (!ops->get_regs || !ops->get_regs_len)
1220                 return -EOPNOTSUPP;
1221
1222         if (copy_from_user(&regs, useraddr, sizeof(regs)))
1223                 return -EFAULT;
1224
1225         reglen = ops->get_regs_len(dev);
1226         if (regs.len > reglen)
1227                 regs.len = reglen;
1228
1229         regbuf = vzalloc(reglen);
1230         if (!regbuf)
1231                 return -ENOMEM;
1232
1233         ops->get_regs(dev, &regs, regbuf);
1234
1235         ret = -EFAULT;
1236         if (copy_to_user(useraddr, &regs, sizeof(regs)))
1237                 goto out;
1238         useraddr += offsetof(struct ethtool_regs, data);
1239         if (copy_to_user(useraddr, regbuf, regs.len))
1240                 goto out;
1241         ret = 0;
1242
1243  out:
1244         vfree(regbuf);
1245         return ret;
1246 }
1247
1248 static int ethtool_reset(struct net_device *dev, char __user *useraddr)
1249 {
1250         struct ethtool_value reset;
1251         int ret;
1252
1253         if (!dev->ethtool_ops->reset)
1254                 return -EOPNOTSUPP;
1255
1256         if (copy_from_user(&reset, useraddr, sizeof(reset)))
1257                 return -EFAULT;
1258
1259         ret = dev->ethtool_ops->reset(dev, &reset.data);
1260         if (ret)
1261                 return ret;
1262
1263         if (copy_to_user(useraddr, &reset, sizeof(reset)))
1264                 return -EFAULT;
1265         return 0;
1266 }
1267
1268 static int ethtool_get_wol(struct net_device *dev, char __user *useraddr)
1269 {
1270         struct ethtool_wolinfo wol = { .cmd = ETHTOOL_GWOL };
1271
1272         if (!dev->ethtool_ops->get_wol)
1273                 return -EOPNOTSUPP;
1274
1275         dev->ethtool_ops->get_wol(dev, &wol);
1276
1277         if (copy_to_user(useraddr, &wol, sizeof(wol)))
1278                 return -EFAULT;
1279         return 0;
1280 }
1281
1282 static int ethtool_set_wol(struct net_device *dev, char __user *useraddr)
1283 {
1284         struct ethtool_wolinfo wol;
1285
1286         if (!dev->ethtool_ops->set_wol)
1287                 return -EOPNOTSUPP;
1288
1289         if (copy_from_user(&wol, useraddr, sizeof(wol)))
1290                 return -EFAULT;
1291
1292         return dev->ethtool_ops->set_wol(dev, &wol);
1293 }
1294
1295 static int ethtool_nway_reset(struct net_device *dev)
1296 {
1297         if (!dev->ethtool_ops->nway_reset)
1298                 return -EOPNOTSUPP;
1299
1300         return dev->ethtool_ops->nway_reset(dev);
1301 }
1302
1303 static int ethtool_get_link(struct net_device *dev, char __user *useraddr)
1304 {
1305         struct ethtool_value edata = { .cmd = ETHTOOL_GLINK };
1306
1307         if (!dev->ethtool_ops->get_link)
1308                 return -EOPNOTSUPP;
1309
1310         edata.data = netif_running(dev) && dev->ethtool_ops->get_link(dev);
1311
1312         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1313                 return -EFAULT;
1314         return 0;
1315 }
1316
1317 static int ethtool_get_eeprom(struct net_device *dev, void __user *useraddr)
1318 {
1319         struct ethtool_eeprom eeprom;
1320         const struct ethtool_ops *ops = dev->ethtool_ops;
1321         void __user *userbuf = useraddr + sizeof(eeprom);
1322         u32 bytes_remaining;
1323         u8 *data;
1324         int ret = 0;
1325
1326         if (!ops->get_eeprom || !ops->get_eeprom_len)
1327                 return -EOPNOTSUPP;
1328
1329         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1330                 return -EFAULT;
1331
1332         /* Check for wrap and zero */
1333         if (eeprom.offset + eeprom.len <= eeprom.offset)
1334                 return -EINVAL;
1335
1336         /* Check for exceeding total eeprom len */
1337         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1338                 return -EINVAL;
1339
1340         data = kmalloc(PAGE_SIZE, GFP_USER);
1341         if (!data)
1342                 return -ENOMEM;
1343
1344         bytes_remaining = eeprom.len;
1345         while (bytes_remaining > 0) {
1346                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1347
1348                 ret = ops->get_eeprom(dev, &eeprom, data);
1349                 if (ret)
1350                         break;
1351                 if (copy_to_user(userbuf, data, eeprom.len)) {
1352                         ret = -EFAULT;
1353                         break;
1354                 }
1355                 userbuf += eeprom.len;
1356                 eeprom.offset += eeprom.len;
1357                 bytes_remaining -= eeprom.len;
1358         }
1359
1360         eeprom.len = userbuf - (useraddr + sizeof(eeprom));
1361         eeprom.offset -= eeprom.len;
1362         if (copy_to_user(useraddr, &eeprom, sizeof(eeprom)))
1363                 ret = -EFAULT;
1364
1365         kfree(data);
1366         return ret;
1367 }
1368
1369 static int ethtool_set_eeprom(struct net_device *dev, void __user *useraddr)
1370 {
1371         struct ethtool_eeprom eeprom;
1372         const struct ethtool_ops *ops = dev->ethtool_ops;
1373         void __user *userbuf = useraddr + sizeof(eeprom);
1374         u32 bytes_remaining;
1375         u8 *data;
1376         int ret = 0;
1377
1378         if (!ops->set_eeprom || !ops->get_eeprom_len)
1379                 return -EOPNOTSUPP;
1380
1381         if (copy_from_user(&eeprom, useraddr, sizeof(eeprom)))
1382                 return -EFAULT;
1383
1384         /* Check for wrap and zero */
1385         if (eeprom.offset + eeprom.len <= eeprom.offset)
1386                 return -EINVAL;
1387
1388         /* Check for exceeding total eeprom len */
1389         if (eeprom.offset + eeprom.len > ops->get_eeprom_len(dev))
1390                 return -EINVAL;
1391
1392         data = kmalloc(PAGE_SIZE, GFP_USER);
1393         if (!data)
1394                 return -ENOMEM;
1395
1396         bytes_remaining = eeprom.len;
1397         while (bytes_remaining > 0) {
1398                 eeprom.len = min(bytes_remaining, (u32)PAGE_SIZE);
1399
1400                 if (copy_from_user(data, userbuf, eeprom.len)) {
1401                         ret = -EFAULT;
1402                         break;
1403                 }
1404                 ret = ops->set_eeprom(dev, &eeprom, data);
1405                 if (ret)
1406                         break;
1407                 userbuf += eeprom.len;
1408                 eeprom.offset += eeprom.len;
1409                 bytes_remaining -= eeprom.len;
1410         }
1411
1412         kfree(data);
1413         return ret;
1414 }
1415
1416 static noinline_for_stack int ethtool_get_coalesce(struct net_device *dev,
1417                                                    void __user *useraddr)
1418 {
1419         struct ethtool_coalesce coalesce = { .cmd = ETHTOOL_GCOALESCE };
1420
1421         if (!dev->ethtool_ops->get_coalesce)
1422                 return -EOPNOTSUPP;
1423
1424         dev->ethtool_ops->get_coalesce(dev, &coalesce);
1425
1426         if (copy_to_user(useraddr, &coalesce, sizeof(coalesce)))
1427                 return -EFAULT;
1428         return 0;
1429 }
1430
1431 static noinline_for_stack int ethtool_set_coalesce(struct net_device *dev,
1432                                                    void __user *useraddr)
1433 {
1434         struct ethtool_coalesce coalesce;
1435
1436         if (!dev->ethtool_ops->set_coalesce)
1437                 return -EOPNOTSUPP;
1438
1439         if (copy_from_user(&coalesce, useraddr, sizeof(coalesce)))
1440                 return -EFAULT;
1441
1442         return dev->ethtool_ops->set_coalesce(dev, &coalesce);
1443 }
1444
1445 static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
1446 {
1447         struct ethtool_ringparam ringparam = { .cmd = ETHTOOL_GRINGPARAM };
1448
1449         if (!dev->ethtool_ops->get_ringparam)
1450                 return -EOPNOTSUPP;
1451
1452         dev->ethtool_ops->get_ringparam(dev, &ringparam);
1453
1454         if (copy_to_user(useraddr, &ringparam, sizeof(ringparam)))
1455                 return -EFAULT;
1456         return 0;
1457 }
1458
1459 static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
1460 {
1461         struct ethtool_ringparam ringparam;
1462
1463         if (!dev->ethtool_ops->set_ringparam)
1464                 return -EOPNOTSUPP;
1465
1466         if (copy_from_user(&ringparam, useraddr, sizeof(ringparam)))
1467                 return -EFAULT;
1468
1469         return dev->ethtool_ops->set_ringparam(dev, &ringparam);
1470 }
1471
1472 static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
1473                                                    void __user *useraddr)
1474 {
1475         struct ethtool_channels channels = { .cmd = ETHTOOL_GCHANNELS };
1476
1477         if (!dev->ethtool_ops->get_channels)
1478                 return -EOPNOTSUPP;
1479
1480         dev->ethtool_ops->get_channels(dev, &channels);
1481
1482         if (copy_to_user(useraddr, &channels, sizeof(channels)))
1483                 return -EFAULT;
1484         return 0;
1485 }
1486
1487 static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
1488                                                    void __user *useraddr)
1489 {
1490         struct ethtool_channels channels;
1491
1492         if (!dev->ethtool_ops->set_channels)
1493                 return -EOPNOTSUPP;
1494
1495         if (copy_from_user(&channels, useraddr, sizeof(channels)))
1496                 return -EFAULT;
1497
1498         return dev->ethtool_ops->set_channels(dev, &channels);
1499 }
1500
1501 static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
1502 {
1503         struct ethtool_pauseparam pauseparam = { ETHTOOL_GPAUSEPARAM };
1504
1505         if (!dev->ethtool_ops->get_pauseparam)
1506                 return -EOPNOTSUPP;
1507
1508         dev->ethtool_ops->get_pauseparam(dev, &pauseparam);
1509
1510         if (copy_to_user(useraddr, &pauseparam, sizeof(pauseparam)))
1511                 return -EFAULT;
1512         return 0;
1513 }
1514
1515 static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
1516 {
1517         struct ethtool_pauseparam pauseparam;
1518
1519         if (!dev->ethtool_ops->set_pauseparam)
1520                 return -EOPNOTSUPP;
1521
1522         if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))
1523                 return -EFAULT;
1524
1525         return dev->ethtool_ops->set_pauseparam(dev, &pauseparam);
1526 }
1527
1528 static int __ethtool_set_sg(struct net_device *dev, u32 data)
1529 {
1530         int err;
1531
1532         if (!dev->ethtool_ops->set_sg)
1533                 return -EOPNOTSUPP;
1534
1535         if (data && !(dev->features & NETIF_F_ALL_CSUM))
1536                 return -EINVAL;
1537
1538         if (!data && dev->ethtool_ops->set_tso) {
1539                 err = dev->ethtool_ops->set_tso(dev, 0);
1540                 if (err)
1541                         return err;
1542         }
1543
1544         if (!data && dev->ethtool_ops->set_ufo) {
1545                 err = dev->ethtool_ops->set_ufo(dev, 0);
1546                 if (err)
1547                         return err;
1548         }
1549         return dev->ethtool_ops->set_sg(dev, data);
1550 }
1551
1552 static int __ethtool_set_tx_csum(struct net_device *dev, u32 data)
1553 {
1554         int err;
1555
1556         if (!dev->ethtool_ops->set_tx_csum)
1557                 return -EOPNOTSUPP;
1558
1559         if (!data && dev->ethtool_ops->set_sg) {
1560                 err = __ethtool_set_sg(dev, 0);
1561                 if (err)
1562                         return err;
1563         }
1564
1565         return dev->ethtool_ops->set_tx_csum(dev, data);
1566 }
1567
1568 static int __ethtool_set_rx_csum(struct net_device *dev, u32 data)
1569 {
1570         if (!dev->ethtool_ops->set_rx_csum)
1571                 return -EOPNOTSUPP;
1572
1573         if (!data)
1574                 dev->features &= ~NETIF_F_GRO;
1575
1576         return dev->ethtool_ops->set_rx_csum(dev, data);
1577 }
1578
1579 static int __ethtool_set_tso(struct net_device *dev, u32 data)
1580 {
1581         if (!dev->ethtool_ops->set_tso)
1582                 return -EOPNOTSUPP;
1583
1584         if (data && !(dev->features & NETIF_F_SG))
1585                 return -EINVAL;
1586
1587         return dev->ethtool_ops->set_tso(dev, data);
1588 }
1589
1590 static int __ethtool_set_ufo(struct net_device *dev, u32 data)
1591 {
1592         if (!dev->ethtool_ops->set_ufo)
1593                 return -EOPNOTSUPP;
1594         if (data && !(dev->features & NETIF_F_SG))
1595                 return -EINVAL;
1596         if (data && !((dev->features & NETIF_F_GEN_CSUM) ||
1597                 (dev->features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM))
1598                         == (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)))
1599                 return -EINVAL;
1600         return dev->ethtool_ops->set_ufo(dev, data);
1601 }
1602
1603 static int ethtool_self_test(struct net_device *dev, char __user *useraddr)
1604 {
1605         struct ethtool_test test;
1606         const struct ethtool_ops *ops = dev->ethtool_ops;
1607         u64 *data;
1608         int ret, test_len;
1609
1610         if (!ops->self_test || !ops->get_sset_count)
1611                 return -EOPNOTSUPP;
1612
1613         test_len = ops->get_sset_count(dev, ETH_SS_TEST);
1614         if (test_len < 0)
1615                 return test_len;
1616         WARN_ON(test_len == 0);
1617
1618         if (copy_from_user(&test, useraddr, sizeof(test)))
1619                 return -EFAULT;
1620
1621         test.len = test_len;
1622         data = kmalloc(test_len * sizeof(u64), GFP_USER);
1623         if (!data)
1624                 return -ENOMEM;
1625
1626         ops->self_test(dev, &test, data);
1627
1628         ret = -EFAULT;
1629         if (copy_to_user(useraddr, &test, sizeof(test)))
1630                 goto out;
1631         useraddr += sizeof(test);
1632         if (copy_to_user(useraddr, data, test.len * sizeof(u64)))
1633                 goto out;
1634         ret = 0;
1635
1636  out:
1637         kfree(data);
1638         return ret;
1639 }
1640
1641 static int ethtool_get_strings(struct net_device *dev, void __user *useraddr)
1642 {
1643         struct ethtool_gstrings gstrings;
1644         u8 *data;
1645         int ret;
1646
1647         if (copy_from_user(&gstrings, useraddr, sizeof(gstrings)))
1648                 return -EFAULT;
1649
1650         ret = __ethtool_get_sset_count(dev, gstrings.string_set);
1651         if (ret < 0)
1652                 return ret;
1653
1654         gstrings.len = ret;
1655
1656         data = kmalloc(gstrings.len * ETH_GSTRING_LEN, GFP_USER);
1657         if (!data)
1658                 return -ENOMEM;
1659
1660         __ethtool_get_strings(dev, gstrings.string_set, data);
1661
1662         ret = -EFAULT;
1663         if (copy_to_user(useraddr, &gstrings, sizeof(gstrings)))
1664                 goto out;
1665         useraddr += sizeof(gstrings);
1666         if (copy_to_user(useraddr, data, gstrings.len * ETH_GSTRING_LEN))
1667                 goto out;
1668         ret = 0;
1669
1670 out:
1671         kfree(data);
1672         return ret;
1673 }
1674
1675 static int ethtool_phys_id(struct net_device *dev, void __user *useraddr)
1676 {
1677         struct ethtool_value id;
1678         static bool busy;
1679         int rc;
1680
1681         if (!dev->ethtool_ops->set_phys_id)
1682                 return -EOPNOTSUPP;
1683
1684         if (busy)
1685                 return -EBUSY;
1686
1687         if (copy_from_user(&id, useraddr, sizeof(id)))
1688                 return -EFAULT;
1689
1690         rc = dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_ACTIVE);
1691         if (rc < 0)
1692                 return rc;
1693
1694         /* Drop the RTNL lock while waiting, but prevent reentry or
1695          * removal of the device.
1696          */
1697         busy = true;
1698         dev_hold(dev);
1699         rtnl_unlock();
1700
1701         if (rc == 0) {
1702                 /* Driver will handle this itself */
1703                 schedule_timeout_interruptible(
1704                         id.data ? (id.data * HZ) : MAX_SCHEDULE_TIMEOUT);
1705         } else {
1706                 /* Driver expects to be called at twice the frequency in rc */
1707                 int n = rc * 2, i, interval = HZ / n;
1708
1709                 /* Count down seconds */
1710                 do {
1711                         /* Count down iterations per second */
1712                         i = n;
1713                         do {
1714                                 rtnl_lock();
1715                                 rc = dev->ethtool_ops->set_phys_id(dev,
1716                                     (i & 1) ? ETHTOOL_ID_OFF : ETHTOOL_ID_ON);
1717                                 rtnl_unlock();
1718                                 if (rc)
1719                                         break;
1720                                 schedule_timeout_interruptible(interval);
1721                         } while (!signal_pending(current) && --i != 0);
1722                 } while (!signal_pending(current) &&
1723                          (id.data == 0 || --id.data != 0));
1724         }
1725
1726         rtnl_lock();
1727         dev_put(dev);
1728         busy = false;
1729
1730         (void)dev->ethtool_ops->set_phys_id(dev, ETHTOOL_ID_INACTIVE);
1731         return rc;
1732 }
1733
1734 static int ethtool_get_stats(struct net_device *dev, void __user *useraddr)
1735 {
1736         struct ethtool_stats stats;
1737         const struct ethtool_ops *ops = dev->ethtool_ops;
1738         u64 *data;
1739         int ret, n_stats;
1740
1741         if (!ops->get_ethtool_stats || !ops->get_sset_count)
1742                 return -EOPNOTSUPP;
1743
1744         n_stats = ops->get_sset_count(dev, ETH_SS_STATS);
1745         if (n_stats < 0)
1746                 return n_stats;
1747         WARN_ON(n_stats == 0);
1748
1749         if (copy_from_user(&stats, useraddr, sizeof(stats)))
1750                 return -EFAULT;
1751
1752         stats.n_stats = n_stats;
1753         data = kmalloc(n_stats * sizeof(u64), GFP_USER);
1754         if (!data)
1755                 return -ENOMEM;
1756
1757         ops->get_ethtool_stats(dev, &stats, data);
1758
1759         ret = -EFAULT;
1760         if (copy_to_user(useraddr, &stats, sizeof(stats)))
1761                 goto out;
1762         useraddr += sizeof(stats);
1763         if (copy_to_user(useraddr, data, stats.n_stats * sizeof(u64)))
1764                 goto out;
1765         ret = 0;
1766
1767  out:
1768         kfree(data);
1769         return ret;
1770 }
1771
1772 static int ethtool_get_perm_addr(struct net_device *dev, void __user *useraddr)
1773 {
1774         struct ethtool_perm_addr epaddr;
1775
1776         if (copy_from_user(&epaddr, useraddr, sizeof(epaddr)))
1777                 return -EFAULT;
1778
1779         if (epaddr.size < dev->addr_len)
1780                 return -ETOOSMALL;
1781         epaddr.size = dev->addr_len;
1782
1783         if (copy_to_user(useraddr, &epaddr, sizeof(epaddr)))
1784                 return -EFAULT;
1785         useraddr += sizeof(epaddr);
1786         if (copy_to_user(useraddr, dev->perm_addr, epaddr.size))
1787                 return -EFAULT;
1788         return 0;
1789 }
1790
1791 static int ethtool_get_value(struct net_device *dev, char __user *useraddr,
1792                              u32 cmd, u32 (*actor)(struct net_device *))
1793 {
1794         struct ethtool_value edata = { .cmd = cmd };
1795
1796         if (!actor)
1797                 return -EOPNOTSUPP;
1798
1799         edata.data = actor(dev);
1800
1801         if (copy_to_user(useraddr, &edata, sizeof(edata)))
1802                 return -EFAULT;
1803         return 0;
1804 }
1805
1806 static int ethtool_set_value_void(struct net_device *dev, char __user *useraddr,
1807                              void (*actor)(struct net_device *, u32))
1808 {
1809         struct ethtool_value edata;
1810
1811         if (!actor)
1812                 return -EOPNOTSUPP;
1813
1814         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1815                 return -EFAULT;
1816
1817         actor(dev, edata.data);
1818         return 0;
1819 }
1820
1821 static int ethtool_set_value(struct net_device *dev, char __user *useraddr,
1822                              int (*actor)(struct net_device *, u32))
1823 {
1824         struct ethtool_value edata;
1825
1826         if (!actor)
1827                 return -EOPNOTSUPP;
1828
1829         if (copy_from_user(&edata, useraddr, sizeof(edata)))
1830                 return -EFAULT;
1831
1832         return actor(dev, edata.data);
1833 }
1834
1835 static noinline_for_stack int ethtool_flash_device(struct net_device *dev,
1836                                                    char __user *useraddr)
1837 {
1838         struct ethtool_flash efl;
1839
1840         if (copy_from_user(&efl, useraddr, sizeof(efl)))
1841                 return -EFAULT;
1842
1843         if (!dev->ethtool_ops->flash_device)
1844                 return -EOPNOTSUPP;
1845
1846         return dev->ethtool_ops->flash_device(dev, &efl);
1847 }
1848
1849 static int ethtool_set_dump(struct net_device *dev,
1850                         void __user *useraddr)
1851 {
1852         struct ethtool_dump dump;
1853
1854         if (!dev->ethtool_ops->set_dump)
1855                 return -EOPNOTSUPP;
1856
1857         if (copy_from_user(&dump, useraddr, sizeof(dump)))
1858                 return -EFAULT;
1859
1860         return dev->ethtool_ops->set_dump(dev, &dump);
1861 }
1862
1863 static int ethtool_get_dump_flag(struct net_device *dev,
1864                                 void __user *useraddr)
1865 {
1866         int ret;
1867         struct ethtool_dump dump;
1868         const struct ethtool_ops *ops = dev->ethtool_ops;
1869
1870         if (!dev->ethtool_ops->get_dump_flag)
1871                 return -EOPNOTSUPP;
1872
1873         if (copy_from_user(&dump, useraddr, sizeof(dump)))
1874                 return -EFAULT;
1875
1876         ret = ops->get_dump_flag(dev, &dump);
1877         if (ret)
1878                 return ret;
1879
1880         if (copy_to_user(useraddr, &dump, sizeof(dump)))
1881                 return -EFAULT;
1882         return 0;
1883 }
1884
1885 static int ethtool_get_dump_data(struct net_device *dev,
1886                                 void __user *useraddr)
1887 {
1888         int ret;
1889         __u32 len;
1890         struct ethtool_dump dump, tmp;
1891         const struct ethtool_ops *ops = dev->ethtool_ops;
1892         void *data = NULL;
1893
1894         if (!dev->ethtool_ops->get_dump_data ||
1895                 !dev->ethtool_ops->get_dump_flag)
1896                 return -EOPNOTSUPP;
1897
1898         if (copy_from_user(&dump, useraddr, sizeof(dump)))
1899                 return -EFAULT;
1900
1901         memset(&tmp, 0, sizeof(tmp));
1902         tmp.cmd = ETHTOOL_GET_DUMP_FLAG;
1903         ret = ops->get_dump_flag(dev, &tmp);
1904         if (ret)
1905                 return ret;
1906
1907         len = (tmp.len > dump.len) ? dump.len : tmp.len;
1908         if (!len)
1909                 return -EFAULT;
1910
1911         data = vzalloc(tmp.len);
1912         if (!data)
1913                 return -ENOMEM;
1914         ret = ops->get_dump_data(dev, &dump, data);
1915         if (ret)
1916                 goto out;
1917
1918         if (copy_to_user(useraddr, &dump, sizeof(dump))) {
1919                 ret = -EFAULT;
1920                 goto out;
1921         }
1922         useraddr += offsetof(struct ethtool_dump, data);
1923         if (copy_to_user(useraddr, data, len))
1924                 ret = -EFAULT;
1925 out:
1926         vfree(data);
1927         return ret;
1928 }
1929
1930 /* The main entry point in this file.  Called from net/core/dev.c */
1931
1932 int dev_ethtool(struct net *net, struct ifreq *ifr)
1933 {
1934         struct net_device *dev = __dev_get_by_name(net, ifr->ifr_name);
1935         void __user *useraddr = ifr->ifr_data;
1936         u32 ethcmd;
1937         int rc;
1938         u32 old_features;
1939
1940         if (!dev || !netif_device_present(dev))
1941                 return -ENODEV;
1942
1943         if (copy_from_user(&ethcmd, useraddr, sizeof(ethcmd)))
1944                 return -EFAULT;
1945
1946         if (!dev->ethtool_ops) {
1947                 /* ETHTOOL_GDRVINFO does not require any driver support.
1948                  * It is also unprivileged and does not change anything,
1949                  * so we can take a shortcut to it. */
1950                 if (ethcmd == ETHTOOL_GDRVINFO)
1951                         return ethtool_get_drvinfo(dev, useraddr);
1952                 else
1953                         return -EOPNOTSUPP;
1954         }
1955
1956         /* Allow some commands to be done by anyone */
1957         switch (ethcmd) {
1958         case ETHTOOL_GSET:
1959         case ETHTOOL_GDRVINFO:
1960         case ETHTOOL_GMSGLVL:
1961         case ETHTOOL_GCOALESCE:
1962         case ETHTOOL_GRINGPARAM:
1963         case ETHTOOL_GPAUSEPARAM:
1964         case ETHTOOL_GRXCSUM:
1965         case ETHTOOL_GTXCSUM:
1966         case ETHTOOL_GSG:
1967         case ETHTOOL_GSTRINGS:
1968         case ETHTOOL_GTSO:
1969         case ETHTOOL_GPERMADDR:
1970         case ETHTOOL_GUFO:
1971         case ETHTOOL_GGSO:
1972         case ETHTOOL_GGRO:
1973         case ETHTOOL_GFLAGS:
1974         case ETHTOOL_GPFLAGS:
1975         case ETHTOOL_GRXFH:
1976         case ETHTOOL_GRXRINGS:
1977         case ETHTOOL_GRXCLSRLCNT:
1978         case ETHTOOL_GRXCLSRULE:
1979         case ETHTOOL_GRXCLSRLALL:
1980         case ETHTOOL_GFEATURES:
1981                 break;
1982         default:
1983                 if (!capable(CAP_NET_ADMIN))
1984                         return -EPERM;
1985         }
1986
1987         if (dev->ethtool_ops->begin) {
1988                 rc = dev->ethtool_ops->begin(dev);
1989                 if (rc  < 0)
1990                         return rc;
1991         }
1992         old_features = dev->features;
1993
1994         switch (ethcmd) {
1995         case ETHTOOL_GSET:
1996                 rc = ethtool_get_settings(dev, useraddr);
1997                 break;
1998         case ETHTOOL_SSET:
1999                 rc = ethtool_set_settings(dev, useraddr);
2000                 break;
2001         case ETHTOOL_GDRVINFO:
2002                 rc = ethtool_get_drvinfo(dev, useraddr);
2003                 break;
2004         case ETHTOOL_GREGS:
2005                 rc = ethtool_get_regs(dev, useraddr);
2006                 break;
2007         case ETHTOOL_GWOL:
2008                 rc = ethtool_get_wol(dev, useraddr);
2009                 break;
2010         case ETHTOOL_SWOL:
2011                 rc = ethtool_set_wol(dev, useraddr);
2012                 break;
2013         case ETHTOOL_GMSGLVL:
2014                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2015                                        dev->ethtool_ops->get_msglevel);
2016                 break;
2017         case ETHTOOL_SMSGLVL:
2018                 rc = ethtool_set_value_void(dev, useraddr,
2019                                        dev->ethtool_ops->set_msglevel);
2020                 break;
2021         case ETHTOOL_NWAY_RST:
2022                 rc = ethtool_nway_reset(dev);
2023                 break;
2024         case ETHTOOL_GLINK:
2025                 rc = ethtool_get_link(dev, useraddr);
2026                 break;
2027         case ETHTOOL_GEEPROM:
2028                 rc = ethtool_get_eeprom(dev, useraddr);
2029                 break;
2030         case ETHTOOL_SEEPROM:
2031                 rc = ethtool_set_eeprom(dev, useraddr);
2032                 break;
2033         case ETHTOOL_GCOALESCE:
2034                 rc = ethtool_get_coalesce(dev, useraddr);
2035                 break;
2036         case ETHTOOL_SCOALESCE:
2037                 rc = ethtool_set_coalesce(dev, useraddr);
2038                 break;
2039         case ETHTOOL_GRINGPARAM:
2040                 rc = ethtool_get_ringparam(dev, useraddr);
2041                 break;
2042         case ETHTOOL_SRINGPARAM:
2043                 rc = ethtool_set_ringparam(dev, useraddr);
2044                 break;
2045         case ETHTOOL_GPAUSEPARAM:
2046                 rc = ethtool_get_pauseparam(dev, useraddr);
2047                 break;
2048         case ETHTOOL_SPAUSEPARAM:
2049                 rc = ethtool_set_pauseparam(dev, useraddr);
2050                 break;
2051         case ETHTOOL_TEST:
2052                 rc = ethtool_self_test(dev, useraddr);
2053                 break;
2054         case ETHTOOL_GSTRINGS:
2055                 rc = ethtool_get_strings(dev, useraddr);
2056                 break;
2057         case ETHTOOL_PHYS_ID:
2058                 rc = ethtool_phys_id(dev, useraddr);
2059                 break;
2060         case ETHTOOL_GSTATS:
2061                 rc = ethtool_get_stats(dev, useraddr);
2062                 break;
2063         case ETHTOOL_GPERMADDR:
2064                 rc = ethtool_get_perm_addr(dev, useraddr);
2065                 break;
2066         case ETHTOOL_GFLAGS:
2067                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2068                                        (dev->ethtool_ops->get_flags ?
2069                                         dev->ethtool_ops->get_flags :
2070                                         ethtool_op_get_flags));
2071                 break;
2072         case ETHTOOL_SFLAGS:
2073                 rc = ethtool_set_value(dev, useraddr, __ethtool_set_flags);
2074                 break;
2075         case ETHTOOL_GPFLAGS:
2076                 rc = ethtool_get_value(dev, useraddr, ethcmd,
2077                                        dev->ethtool_ops->get_priv_flags);
2078                 break;
2079         case ETHTOOL_SPFLAGS:
2080                 rc = ethtool_set_value(dev, useraddr,
2081                                        dev->ethtool_ops->set_priv_flags);
2082                 break;
2083         case ETHTOOL_GRXFH:
2084         case ETHTOOL_GRXRINGS:
2085         case ETHTOOL_GRXCLSRLCNT:
2086         case ETHTOOL_GRXCLSRULE:
2087         case ETHTOOL_GRXCLSRLALL:
2088                 rc = ethtool_get_rxnfc(dev, ethcmd, useraddr);
2089                 break;
2090         case ETHTOOL_SRXFH:
2091         case ETHTOOL_SRXCLSRLDEL:
2092         case ETHTOOL_SRXCLSRLINS:
2093                 rc = ethtool_set_rxnfc(dev, ethcmd, useraddr);
2094                 break;
2095         case ETHTOOL_FLASHDEV:
2096                 rc = ethtool_flash_device(dev, useraddr);
2097                 break;
2098         case ETHTOOL_RESET:
2099                 rc = ethtool_reset(dev, useraddr);
2100                 break;
2101         case ETHTOOL_SRXNTUPLE:
2102                 rc = ethtool_set_rx_ntuple(dev, useraddr);
2103                 break;
2104         case ETHTOOL_GRXNTUPLE:
2105                 rc = ethtool_get_rx_ntuple(dev, useraddr);
2106                 break;
2107         case ETHTOOL_GSSET_INFO:
2108                 rc = ethtool_get_sset_info(dev, useraddr);
2109                 break;
2110         case ETHTOOL_GRXFHINDIR:
2111                 rc = ethtool_get_rxfh_indir(dev, useraddr);
2112                 break;
2113         case ETHTOOL_SRXFHINDIR:
2114                 rc = ethtool_set_rxfh_indir(dev, useraddr);
2115                 break;
2116         case ETHTOOL_GFEATURES:
2117                 rc = ethtool_get_features(dev, useraddr);
2118                 break;
2119         case ETHTOOL_SFEATURES:
2120                 rc = ethtool_set_features(dev, useraddr);
2121                 break;
2122         case ETHTOOL_GTXCSUM:
2123         case ETHTOOL_GRXCSUM:
2124         case ETHTOOL_GSG:
2125         case ETHTOOL_GTSO:
2126         case ETHTOOL_GUFO:
2127         case ETHTOOL_GGSO:
2128         case ETHTOOL_GGRO:
2129                 rc = ethtool_get_one_feature(dev, useraddr, ethcmd);
2130                 break;
2131         case ETHTOOL_STXCSUM:
2132         case ETHTOOL_SRXCSUM:
2133         case ETHTOOL_SSG:
2134         case ETHTOOL_STSO:
2135         case ETHTOOL_SUFO:
2136         case ETHTOOL_SGSO:
2137         case ETHTOOL_SGRO:
2138                 rc = ethtool_set_one_feature(dev, useraddr, ethcmd);
2139                 break;
2140         case ETHTOOL_GCHANNELS:
2141                 rc = ethtool_get_channels(dev, useraddr);
2142                 break;
2143         case ETHTOOL_SCHANNELS:
2144                 rc = ethtool_set_channels(dev, useraddr);
2145                 break;
2146         case ETHTOOL_SET_DUMP:
2147                 rc = ethtool_set_dump(dev, useraddr);
2148                 break;
2149         case ETHTOOL_GET_DUMP_FLAG:
2150                 rc = ethtool_get_dump_flag(dev, useraddr);
2151                 break;
2152         case ETHTOOL_GET_DUMP_DATA:
2153                 rc = ethtool_get_dump_data(dev, useraddr);
2154                 break;
2155         default:
2156                 rc = -EOPNOTSUPP;
2157         }
2158
2159         if (dev->ethtool_ops->complete)
2160                 dev->ethtool_ops->complete(dev);
2161
2162         if (old_features != dev->features)
2163                 netdev_features_change(dev);
2164
2165         return rc;
2166 }