reactos/ntoskrnl/io/iomgr/driver.c

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            ntoskrnl/io/iomgr/driver.c
   5  * PURPOSE:         Driver Object Management
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  *                  Filip Navara (navaraf@reactos.org)
   8  *                  Hervé Poussineau (hpoussin@reactos.org)
   9  */
  10
  11 /* INCLUDES *******************************************************************/
  12
  13 #include <ntoskrnl.h>
  14 #define NDEBUG
  15 #include <debug.h>
  16
  17 /* GLOBALS ********************************************************************/
  18
  19 LIST_ENTRY DriverReinitListHead;
  20 KSPIN_LOCK DriverReinitListLock;
  21 PLIST_ENTRY DriverReinitTailEntry;
  22
  23 PLIST_ENTRY DriverBootReinitTailEntry;
  24 LIST_ENTRY DriverBootReinitListHead;
  25 KSPIN_LOCK DriverBootReinitListLock;
  26
  27 UNICODE_STRING IopHardwareDatabaseKey =
  28    RTL_CONSTANT_STRING(L"\\REGISTRY\\MACHINE\\HARDWARE\\DESCRIPTION\\SYSTEM");
  29
  30 POBJECT_TYPE IoDriverObjectType = NULL;
  31
  32 #define TAG_RTLREGISTRY 'vrqR'
  33
  34 extern BOOLEAN ExpInTextModeSetup;
  35 extern BOOLEAN PnpSystemInit;
  36
  37 USHORT IopGroupIndex;
  38 PLIST_ENTRY IopGroupTable;
  39
  40 /* PRIVATE FUNCTIONS **********************************************************/
  41
  42 NTSTATUS NTAPI
  43 IopInvalidDeviceRequest(
  44    PDEVICE_OBJECT DeviceObject,
  45    PIRP Irp)
  46 {
  47    Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
  48    Irp->IoStatus.Information = 0;
  49    IoCompleteRequest(Irp, IO_NO_INCREMENT);
  50    return STATUS_INVALID_DEVICE_REQUEST;
  51 }
  52
  53 VOID
  54 NTAPI
  55 IopDeleteDriver(IN PVOID ObjectBody)
  56 {
  57     PDRIVER_OBJECT DriverObject = ObjectBody;
  58     PIO_CLIENT_EXTENSION DriverExtension, NextDriverExtension;
  59     PAGED_CODE();
  60
  61     /* Get the extension and loop them */
  62     DriverExtension = IoGetDrvObjExtension(DriverObject)->
  63                       ClientDriverExtension;
  64     while (DriverExtension)
  65     {
  66         /* Get the next one */
  67         NextDriverExtension = DriverExtension->NextExtension;
  68         ExFreePoolWithTag(DriverExtension, TAG_DRIVER_EXTENSION);
  69
  70         /* Move on */
  71         DriverExtension = NextDriverExtension;
  72     }
  73
  74     /* Check if the driver image is still loaded */
  75     if (DriverObject->DriverSection)
  76     {
  77         /* Unload it */
  78         MmUnloadSystemImage(DriverObject->DriverSection);
  79     }
  80
  81     /* Check if it has a name */
  82     if (DriverObject->DriverName.Buffer)
  83     {
  84         /* Free it */
  85         ExFreePool(DriverObject->DriverName.Buffer);
  86     }
  87
  88 #if 0 /* See a bit of hack in IopCreateDriver */
  89     /* Check if it has a service key name */
  90     if (DriverObject->DriverExtension->ServiceKeyName.Buffer)
  91     {
  92         /* Free it */
  93         ExFreePool(DriverObject->DriverExtension->ServiceKeyName.Buffer);
  94     }
  95 #endif
  96 }
  97
  98 NTSTATUS FASTCALL
  99 IopGetDriverObject(
 100    PDRIVER_OBJECT *DriverObject,
 101    PUNICODE_STRING ServiceName,
 102    BOOLEAN FileSystem)
 103 {
 104    PDRIVER_OBJECT Object;
 105    WCHAR NameBuffer[MAX_PATH];
 106    UNICODE_STRING DriverName;
 107    NTSTATUS Status;
 108
 109    DPRINT("IopGetDriverObject(%p '%wZ' %x)\n",
 110       DriverObject, ServiceName, FileSystem);
 111
 112    *DriverObject = NULL;
 113
 114    /* Create ModuleName string */
 115    if (ServiceName == NULL || ServiceName->Buffer == NULL)
 116       /* We don't know which DriverObject we have to open */
 117       return STATUS_INVALID_PARAMETER_2;
 118
 119    DriverName.Buffer = NameBuffer;
 120    DriverName.Length = 0;
 121    DriverName.MaximumLength = sizeof(NameBuffer);
 122
 123    if (FileSystem == TRUE)
 124       RtlAppendUnicodeToString(&DriverName, FILESYSTEM_ROOT_NAME);
 125    else
 126       RtlAppendUnicodeToString(&DriverName, DRIVER_ROOT_NAME);
 127    RtlAppendUnicodeStringToString(&DriverName, ServiceName);
 128
 129    DPRINT("Driver name: '%wZ'\n", &DriverName);
 130
 131    /* Open driver object */
 132    Status = ObReferenceObjectByName(
 133       &DriverName,
 134       OBJ_OPENIF | OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE, /* Attributes */
 135       NULL, /* PassedAccessState */
 136       0, /* DesiredAccess */
 137       IoDriverObjectType,
 138       KernelMode,
 139       NULL, /* ParseContext */
 140       (PVOID*)&Object);
 141
 142    if (!NT_SUCCESS(Status))
 143    {
 144       DPRINT("Failed to reference driver object, status=0x%08x\n", Status);
 145       return Status;
 146    }
 147
 148    *DriverObject = Object;
 149
 150    DPRINT("Driver Object: %p\n", Object);
 151
 152    return STATUS_SUCCESS;
 153 }
 154
 155 /*
 156  * RETURNS
 157  *  TRUE if String2 contains String1 as a suffix.
 158  */
 159 BOOLEAN
 160 NTAPI
 161 IopSuffixUnicodeString(
 162     IN PCUNICODE_STRING String1,
 163     IN PCUNICODE_STRING String2)
 164 {
 165     PWCHAR pc1;
 166     PWCHAR pc2;
 167     ULONG Length;
 168
 169     if (String2->Length < String1->Length)
 170         return FALSE;
 171
 172     Length = String1->Length / 2;
 173     pc1 = String1->Buffer;
 174     pc2 = &String2->Buffer[String2->Length / sizeof(WCHAR) - Length];
 175
 176     if (pc1 && pc2)
 177     {
 178         while (Length--)
 179         {
 180             if( *pc1++ != *pc2++ )
 181                 return FALSE;
 182         }
 183         return TRUE;
 184     }
 185     return FALSE;
 186 }
 187
 188 /*
 189  * IopDisplayLoadingMessage
 190  *
 191  * Display 'Loading XXX...' message.
 192  */
 193
 194 VOID
 195 FASTCALL
 196 INIT_FUNCTION
 197 IopDisplayLoadingMessage(PUNICODE_STRING ServiceName)
 198 {
 199     CHAR TextBuffer[256];
 200     UNICODE_STRING DotSys = RTL_CONSTANT_STRING(L".SYS");
 201
 202     if (ExpInTextModeSetup) return;
 203     if (!KeLoaderBlock) return;
 204     RtlUpcaseUnicodeString(ServiceName, ServiceName, FALSE);
 205     snprintf(TextBuffer, sizeof(TextBuffer),
 206             "%s%sSystem32\\Drivers\\%wZ%s\n",
 207             KeLoaderBlock->ArcBootDeviceName,
 208             KeLoaderBlock->NtBootPathName,
 209             ServiceName,
 210             IopSuffixUnicodeString(&DotSys, ServiceName) ? "" : ".SYS");
 211     HalDisplayString(TextBuffer);
 212 }
 213
 214 /*
 215  * IopNormalizeImagePath
 216  *
 217  * Normalize an image path to contain complete path.
 218  *
 219  * Parameters
 220  *    ImagePath
 221  *       The input path and on exit the result path. ImagePath.Buffer
 222  *       must be allocated by ExAllocatePool on input. Caller is responsible
 223  *       for freeing the buffer when it's no longer needed.
 224  *
 225  *    ServiceName
 226  *       Name of the service that ImagePath belongs to.
 227  *
 228  * Return Value
 229  *    Status
 230  *
 231  * Remarks
 232  *    The input image path isn't freed on error.
 233  */
 234
 235 NTSTATUS FASTCALL
 236 IopNormalizeImagePath(
 237    IN OUT PUNICODE_STRING ImagePath,
 238    IN PUNICODE_STRING ServiceName)
 239 {
 240    UNICODE_STRING InputImagePath;
 241
 242    RtlCopyMemory(
 243       &InputImagePath,
 244       ImagePath,
 245       sizeof(UNICODE_STRING));
 246
 247    if (InputImagePath.Length == 0)
 248    {
 249       ImagePath->Length = 0;
 250       ImagePath->MaximumLength =
 251           (33 * sizeof(WCHAR)) + ServiceName->Length + sizeof(UNICODE_NULL);
 252       ImagePath->Buffer = ExAllocatePool(NonPagedPool, ImagePath->MaximumLength);
 253       if (ImagePath->Buffer == NULL)
 254          return STATUS_NO_MEMORY;
 255
 256       RtlAppendUnicodeToString(ImagePath, L"\\SystemRoot\\system32\\drivers\\");
 257       RtlAppendUnicodeStringToString(ImagePath, ServiceName);
 258       RtlAppendUnicodeToString(ImagePath, L".sys");
 259    } else
 260    if (InputImagePath.Buffer[0] != L'\\')
 261    {
 262       ImagePath->Length = 0;
 263       ImagePath->MaximumLength =
 264           12 * sizeof(WCHAR) + InputImagePath.Length + sizeof(UNICODE_NULL);
 265       ImagePath->Buffer = ExAllocatePool(NonPagedPool, ImagePath->MaximumLength);
 266       if (ImagePath->Buffer == NULL)
 267          return STATUS_NO_MEMORY;
 268
 269       RtlAppendUnicodeToString(ImagePath, L"\\SystemRoot\\");
 270       RtlAppendUnicodeStringToString(ImagePath, &InputImagePath);
 271
 272       /* Free caller's string */
 273       ExFreePoolWithTag(InputImagePath.Buffer, TAG_RTLREGISTRY);
 274    }
 275
 276    return STATUS_SUCCESS;
 277 }
 278
 279 /*
 280  * IopLoadServiceModule
 281  *
 282  * Load a module specified by registry settings for service.
 283  *
 284  * Parameters
 285  *    ServiceName
 286  *       Name of the service to load.
 287  *
 288  * Return Value
 289  *    Status
 290  */
 291
 292 NTSTATUS FASTCALL
 293 IopLoadServiceModule(
 294    IN PUNICODE_STRING ServiceName,
 295    OUT PLDR_DATA_TABLE_ENTRY *ModuleObject)
 296 {
 297    RTL_QUERY_REGISTRY_TABLE QueryTable[3];
 298    ULONG ServiceStart;
 299    UNICODE_STRING ServiceImagePath, CCSName;
 300    NTSTATUS Status;
 301    HANDLE CCSKey, ServiceKey;
 302    PVOID BaseAddress;
 303
 304    DPRINT("IopLoadServiceModule(%wZ, 0x%p)\n", ServiceName, ModuleObject);
 305
 306    /* FIXME: This check may be removed once the bug is fixed */
 307    if (ServiceName->Buffer == NULL)
 308    {
 309        DPRINT1("If you see this, please report to Fireball or hpoussin!\n");
 310       return STATUS_UNSUCCESSFUL;
 311    }
 312
 313    if (ExpInTextModeSetup)
 314    {
 315        /* We have no registry, but luckily we know where all the drivers are */
 316
 317        /* ServiceStart < 4 is all that matters */
 318        ServiceStart = 0;
 319
 320        /* IopNormalizeImagePath will do all of the work for us if we give it an empty string */
 321        ServiceImagePath.Length = ServiceImagePath.MaximumLength = 0;
 322        ServiceImagePath.Buffer = NULL;
 323    }
 324    else
 325    {
 326        /* Open CurrentControlSet */
 327        RtlInitUnicodeString(&CCSName,
 328                             L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Services");
 329        Status = IopOpenRegistryKeyEx(&CCSKey, NULL, &CCSName, KEY_READ);
 330        if (!NT_SUCCESS(Status))
 331        {
 332            DPRINT1("ZwOpenKey() failed with Status %08X\n", Status);
 333            return Status;
 334        }
 335
 336        /* Open service key */
 337        Status = IopOpenRegistryKeyEx(&ServiceKey, CCSKey, ServiceName, KEY_READ);
 338        if (!NT_SUCCESS(Status))
 339        {
 340            DPRINT1("ZwOpenKey() failed with Status %08X\n", Status);
 341            ZwClose(CCSKey);
 342            return Status;
 343        }
 344
 345        /*
 346         * Get information about the service.
 347         */
 348
 349        RtlZeroMemory(QueryTable, sizeof(QueryTable));
 350
 351        RtlInitUnicodeString(&ServiceImagePath, NULL);
 352
 353        QueryTable[0].Name = L"Start";
 354        QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
 355        QueryTable[0].EntryContext = &ServiceStart;
 356
 357        QueryTable[1].Name = L"ImagePath";
 358        QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT;
 359        QueryTable[1].EntryContext = &ServiceImagePath;
 360
 361        Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
 362           (PWSTR)ServiceKey, QueryTable, NULL, NULL);
 363
 364        ZwClose(ServiceKey);
 365        ZwClose(CCSKey);
 366
 367        if (!NT_SUCCESS(Status))
 368        {
 369           DPRINT1("RtlQueryRegistryValues() failed (Status %x)\n", Status);
 370           return Status;
 371        }
 372    }
 373
 374    /*
 375     * Normalize the image path for all later processing.
 376     */
 377
 378    Status = IopNormalizeImagePath(&ServiceImagePath, ServiceName);
 379
 380    if (!NT_SUCCESS(Status))
 381    {
 382       DPRINT("IopNormalizeImagePath() failed (Status %x)\n", Status);
 383       return Status;
 384    }
 385
 386    /*
 387     * Case for disabled drivers
 388     */
 389
 390    if (ServiceStart >= 4)
 391    {
 392       /* FIXME: Check if it is the right status code */
 393       Status = STATUS_PLUGPLAY_NO_DEVICE;
 394    }
 395    else
 396    {
 397       DPRINT("Loading module\n");
 398       Status = MmLoadSystemImage(&ServiceImagePath, NULL, NULL, 0, (PVOID)ModuleObject, &BaseAddress);
 399    }
 400
 401    ExFreePool(ServiceImagePath.Buffer);
 402
 403    /*
 404     * Now check if the module was loaded successfully.
 405     */
 406
 407    if (!NT_SUCCESS(Status))
 408    {
 409       DPRINT("Module loading failed (Status %x)\n", Status);
 410    }
 411
 412    DPRINT("Module loading (Status %x)\n", Status);
 413
 414    return Status;
 415 }
 416
 417 /*
 418  * IopInitializeDriverModule
 419  *
 420  * Initalize a loaded driver.
 421  *
 422  * Parameters
 423  *    DeviceNode
 424  *       Pointer to device node.
 425  *
 426  *    ModuleObject
 427  *       Module object representing the driver. It can be retrieve by
 428  *       IopLoadServiceModule.
 429  *
 430  *    ServiceName
 431  *       Name of the service (as in registry).
 432  *
 433  *    FileSystemDriver
 434  *       Set to TRUE for file system drivers.
 435  *
 436  *    DriverObject
 437  *       On successful return this contains the driver object representing
 438  *       the loaded driver.
 439  */
 440
 441 NTSTATUS FASTCALL
 442 IopInitializeDriverModule(
 443    IN PDEVICE_NODE DeviceNode,
 444    IN PLDR_DATA_TABLE_ENTRY ModuleObject,
 445    IN PUNICODE_STRING ServiceName,
 446    IN BOOLEAN FileSystemDriver,
 447    OUT PDRIVER_OBJECT *DriverObject)
 448 {
 449    const WCHAR ServicesKeyName[] = L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\";
 450    WCHAR NameBuffer[MAX_PATH];
 451    UNICODE_STRING DriverName;
 452    UNICODE_STRING RegistryKey;
 453    PDRIVER_INITIALIZE DriverEntry;
 454    PDRIVER_OBJECT Driver;
 455    NTSTATUS Status;
 456
 457    DriverEntry = ModuleObject->EntryPoint;
 458
 459    if (ServiceName != NULL && ServiceName->Length != 0)
 460    {
 461       RegistryKey.Length = 0;
 462       RegistryKey.MaximumLength = sizeof(ServicesKeyName) + ServiceName->Length;
 463       RegistryKey.Buffer = ExAllocatePool(PagedPool, RegistryKey.MaximumLength);
 464       if (RegistryKey.Buffer == NULL)
 465       {
 466          return STATUS_INSUFFICIENT_RESOURCES;
 467       }
 468       RtlAppendUnicodeToString(&RegistryKey, ServicesKeyName);
 469       RtlAppendUnicodeStringToString(&RegistryKey, ServiceName);
 470    }
 471    else
 472    {
 473       RtlInitUnicodeString(&RegistryKey, NULL);
 474    }
 475
 476    /* Create ModuleName string */
 477    if (ServiceName && ServiceName->Length > 0)
 478    {
 479       if (FileSystemDriver == TRUE)
 480          wcscpy(NameBuffer, FILESYSTEM_ROOT_NAME);
 481       else
 482          wcscpy(NameBuffer, DRIVER_ROOT_NAME);
 483
 484       RtlInitUnicodeString(&DriverName, NameBuffer);
 485       DriverName.MaximumLength = sizeof(NameBuffer);
 486
 487       RtlAppendUnicodeStringToString(&DriverName, ServiceName);
 488
 489       DPRINT("Driver name: '%wZ'\n", &DriverName);
 490    }
 491    else
 492       DriverName.Length = 0;
 493
 494    Status = IopCreateDriver(
 495        DriverName.Length > 0 ? &DriverName : NULL,
 496        DriverEntry,
 497        &RegistryKey,
 498        ModuleObject,
 499        &Driver);
 500    RtlFreeUnicodeString(&RegistryKey);
 501
 502    *DriverObject = Driver;
 503    if (!NT_SUCCESS(Status))
 504    {
 505       DPRINT("IopCreateDriver() failed (Status 0x%08lx)\n", Status);
 506       return Status;
 507    }
 508
 509    /* Set the driver as initialized */
 510    IopReadyDeviceObjects(Driver);
 511
 512    if (PnpSystemInit) IopReinitializeDrivers();
 513
 514    return STATUS_SUCCESS;
 515 }
 516
 517 /*
 518  * IopAttachFilterDriversCallback
 519  *
 520  * Internal routine used by IopAttachFilterDrivers.
 521  */
 522
 523 NTSTATUS NTAPI
 524 IopAttachFilterDriversCallback(
 525    PWSTR ValueName,
 526    ULONG ValueType,
 527    PVOID ValueData,
 528    ULONG ValueLength,
 529    PVOID Context,
 530    PVOID EntryContext)
 531 {
 532    PDEVICE_NODE DeviceNode = Context;
 533    UNICODE_STRING ServiceName;
 534    PWCHAR Filters;
 535    PLDR_DATA_TABLE_ENTRY ModuleObject;
 536    PDRIVER_OBJECT DriverObject;
 537    NTSTATUS Status;
 538
 539    for (Filters = ValueData;
 540         ((ULONG_PTR)Filters - (ULONG_PTR)ValueData) < ValueLength &&
 541         *Filters != 0;
 542         Filters += (ServiceName.Length / sizeof(WCHAR)) + 1)
 543    {
 544       DPRINT("Filter Driver: %S (%wZ)\n", Filters, &DeviceNode->InstancePath);
 545       ServiceName.Buffer = Filters;
 546       ServiceName.MaximumLength =
 547       ServiceName.Length = wcslen(Filters) * sizeof(WCHAR);
 548
 549       /* Load and initialize the filter driver */
 550       Status = IopLoadServiceModule(&ServiceName, &ModuleObject);
 551       if (Status != STATUS_IMAGE_ALREADY_LOADED)
 552       {
 553          if (!NT_SUCCESS(Status))
 554             continue;
 555
 556          Status = IopInitializeDriverModule(DeviceNode, ModuleObject, &ServiceName,
 557                                             FALSE, &DriverObject);
 558          if (!NT_SUCCESS(Status))
 559             continue;
 560       }
 561       else
 562       {
 563          /* get existing DriverObject pointer */
 564          Status = IopGetDriverObject(
 565             &DriverObject,
 566             &ServiceName,
 567             FALSE);
 568          if (!NT_SUCCESS(Status))
 569          {
 570             DPRINT1("IopGetDriverObject() returned status 0x%08x!\n", Status);
 571             continue;
 572          }
 573       }
 574
 575       Status = IopInitializeDevice(DeviceNode, DriverObject);
 576       if (!NT_SUCCESS(Status))
 577          continue;
 578    }
 579
 580    return STATUS_SUCCESS;
 581 }
 582
 583 /*
 584  * IopAttachFilterDrivers
 585  *
 586  * Load filter drivers for specified device node.
 587  *
 588  * Parameters
 589  *    Lower
 590  *       Set to TRUE for loading lower level filters or FALSE for upper
 591  *       level filters.
 592  */
 593
 594 NTSTATUS FASTCALL
 595 IopAttachFilterDrivers(
 596    PDEVICE_NODE DeviceNode,
 597    BOOLEAN Lower)
 598 {
 599    RTL_QUERY_REGISTRY_TABLE QueryTable[2] = { { NULL, 0, NULL, NULL, 0, NULL, 0 }, };
 600    UNICODE_STRING Class;
 601    WCHAR ClassBuffer[40];
 602    UNICODE_STRING EnumRoot = RTL_CONSTANT_STRING(ENUM_ROOT);
 603    HANDLE EnumRootKey, SubKey;
 604    NTSTATUS Status;
 605
 606    /* Open enumeration root key */
 607    Status = IopOpenRegistryKeyEx(&EnumRootKey, NULL,
 608        &EnumRoot, KEY_READ);
 609    if (!NT_SUCCESS(Status))
 610    {
 611        DPRINT1("ZwOpenKey() failed with Status %08X\n", Status);
 612        return Status;
 613    }
 614
 615    /* Open subkey */
 616    Status = IopOpenRegistryKeyEx(&SubKey, EnumRootKey,
 617        &DeviceNode->InstancePath, KEY_READ);
 618    if (!NT_SUCCESS(Status))
 619    {
 620        DPRINT1("ZwOpenKey() failed with Status %08X\n", Status);
 621        ZwClose(EnumRootKey);
 622        return Status;
 623    }
 624
 625    /*
 626     * First load the device filters
 627     */
 628    QueryTable[0].QueryRoutine = IopAttachFilterDriversCallback;
 629    if (Lower)
 630      QueryTable[0].Name = L"LowerFilters";
 631    else
 632      QueryTable[0].Name = L"UpperFilters";
 633    QueryTable[0].Flags = RTL_QUERY_REGISTRY_REQUIRED;
 634
 635    RtlQueryRegistryValues(
 636       RTL_REGISTRY_HANDLE,
 637       (PWSTR)SubKey,
 638       QueryTable,
 639       DeviceNode,
 640       NULL);
 641
 642    /*
 643     * Now get the class GUID
 644     */
 645    Class.Length = 0;
 646    Class.MaximumLength = 40 * sizeof(WCHAR);
 647    Class.Buffer = ClassBuffer;
 648    QueryTable[0].QueryRoutine = NULL;
 649    QueryTable[0].Name = L"ClassGUID";
 650    QueryTable[0].EntryContext = &Class;
 651    QueryTable[0].Flags = RTL_QUERY_REGISTRY_REQUIRED | RTL_QUERY_REGISTRY_DIRECT;
 652
 653    Status = RtlQueryRegistryValues(
 654       RTL_REGISTRY_HANDLE,
 655       (PWSTR)SubKey,
 656       QueryTable,
 657       DeviceNode,
 658       NULL);
 659
 660    /* Close handles */
 661    ZwClose(SubKey);
 662    ZwClose(EnumRootKey);
 663
 664    /*
 665     * Load the class filter driver
 666     */
 667    if (NT_SUCCESS(Status))
 668    {
 669        UNICODE_STRING ControlClass = RTL_CONSTANT_STRING(L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\Class");
 670
 671        Status = IopOpenRegistryKeyEx(&EnumRootKey, NULL,
 672            &ControlClass, KEY_READ);
 673        if (!NT_SUCCESS(Status))
 674        {
 675            DPRINT1("ZwOpenKey() failed with Status %08X\n", Status);
 676            return Status;
 677        }
 678
 679        /* Open subkey */
 680        Status = IopOpenRegistryKeyEx(&SubKey, EnumRootKey,
 681            &Class, KEY_READ);
 682        if (!NT_SUCCESS(Status))
 683        {
 684            DPRINT1("ZwOpenKey() failed with Status %08X\n", Status);
 685            ZwClose(EnumRootKey);
 686            return Status;
 687        }
 688
 689       QueryTable[0].QueryRoutine = IopAttachFilterDriversCallback;
 690       if (Lower)
 691          QueryTable[0].Name = L"LowerFilters";
 692       else
 693          QueryTable[0].Name = L"UpperFilters";
 694       QueryTable[0].EntryContext = NULL;
 695       QueryTable[0].Flags = RTL_QUERY_REGISTRY_REQUIRED;
 696
 697       RtlQueryRegistryValues(
 698          RTL_REGISTRY_HANDLE,
 699          (PWSTR)SubKey,
 700          QueryTable,
 701          DeviceNode,
 702          NULL);
 703
 704       /* Clean up */
 705       ZwClose(SubKey);
 706       ZwClose(EnumRootKey);
 707    }
 708
 709    return STATUS_SUCCESS;
 710 }
 711
 712 NTSTATUS
 713 NTAPI
 714 MiResolveImageReferences(IN PVOID ImageBase,
 715                          IN PUNICODE_STRING ImageFileDirectory,
 716                          IN PUNICODE_STRING NamePrefix OPTIONAL,
 717                          OUT PCHAR *MissingApi,
 718                          OUT PWCHAR *MissingDriver,
 719                          OUT PLOAD_IMPORTS *LoadImports);
 720
 721 //
 722 // Used for images already loaded (boot drivers)
 723 //
 724 NTSTATUS
 725 NTAPI
 726 INIT_FUNCTION
 727 LdrProcessDriverModule(PLDR_DATA_TABLE_ENTRY LdrEntry,
 728                        PUNICODE_STRING FileName,
 729                        PLDR_DATA_TABLE_ENTRY *ModuleObject)
 730 {
 731     NTSTATUS Status;
 732     UNICODE_STRING BaseName, BaseDirectory;
 733     PLOAD_IMPORTS LoadedImports = (PVOID)-2;
 734     PCHAR MissingApiName, Buffer;
 735     PWCHAR MissingDriverName;
 736     PVOID DriverBase = LdrEntry->DllBase;
 737
 738     /* Allocate a buffer we'll use for names */
 739     Buffer = ExAllocatePoolWithTag(NonPagedPool, MAX_PATH, TAG_LDR_WSTR);
 740     if (!Buffer)
 741     {
 742         /* Fail */
 743         return STATUS_INSUFFICIENT_RESOURCES;
 744     }
 745
 746     /* Check for a separator */
 747     if (FileName->Buffer[0] == OBJ_NAME_PATH_SEPARATOR)
 748     {
 749         PWCHAR p;
 750         ULONG BaseLength;
 751
 752         /* Loop the path until we get to the base name */
 753         p = &FileName->Buffer[FileName->Length / sizeof(WCHAR)];
 754         while (*(p - 1) != OBJ_NAME_PATH_SEPARATOR) p--;
 755
 756         /* Get the length */
 757         BaseLength = (ULONG)(&FileName->Buffer[FileName->Length / sizeof(WCHAR)] - p);
 758         BaseLength *= sizeof(WCHAR);
 759
 760         /* Setup the string */
 761         BaseName.Length = (USHORT)BaseLength;
 762         BaseName.Buffer = p;
 763     }
 764     else
 765     {
 766         /* Otherwise, we already have a base name */
 767         BaseName.Length = FileName->Length;
 768         BaseName.Buffer = FileName->Buffer;
 769     }
 770
 771     /* Setup the maximum length */
 772     BaseName.MaximumLength = BaseName.Length;
 773
 774     /* Now compute the base directory */
 775     BaseDirectory = *FileName;
 776     BaseDirectory.Length -= BaseName.Length;
 777     BaseDirectory.MaximumLength = BaseDirectory.Length;
 778
 779     /* Resolve imports */
 780     MissingApiName = Buffer;
 781     Status = MiResolveImageReferences(DriverBase,
 782                                       &BaseDirectory,
 783                                       NULL,
 784                                       &MissingApiName,
 785                                       &MissingDriverName,
 786                                       &LoadedImports);
 787     if (!NT_SUCCESS(Status)) return Status;
 788
 789     /* Return */
 790     *ModuleObject = LdrEntry;
 791     return STATUS_SUCCESS;
 792 }
 793
 794 /*
 795  * IopInitializeBuiltinDriver
 796  *
 797  * Initialize a driver that is already loaded in memory.
 798  */
 799
 800 NTSTATUS
 801 NTAPI
 802 INIT_FUNCTION
 803 IopInitializeBuiltinDriver(IN PLDR_DATA_TABLE_ENTRY LdrEntry)
 804 {
 805     PDEVICE_NODE DeviceNode;
 806     PDRIVER_OBJECT DriverObject;
 807     NTSTATUS Status;
 808     PWCHAR FileNameWithoutPath;
 809     LPWSTR FileExtension;
 810     PUNICODE_STRING ModuleName = &LdrEntry->BaseDllName;
 811     UNICODE_STRING ServiceName;
 812
 813    /*
 814     * Display 'Loading XXX...' message
 815     */
 816    IopDisplayLoadingMessage(ModuleName);
 817    InbvIndicateProgress();
 818
 819    /*
 820     * Generate filename without path (not needed by freeldr)
 821     */
 822    FileNameWithoutPath = wcsrchr(ModuleName->Buffer, L'\\');
 823    if (FileNameWithoutPath == NULL)
 824    {
 825       FileNameWithoutPath = ModuleName->Buffer;
 826    }
 827    else
 828    {
 829       FileNameWithoutPath++;
 830    }
 831
 832    /*
 833     * Strip the file extension from ServiceName
 834     */
 835    RtlCreateUnicodeString(&ServiceName, FileNameWithoutPath);
 836    FileExtension = wcsrchr(ServiceName.Buffer, '.');
 837    if (FileExtension != NULL)
 838    {
 839       ServiceName.Length -= wcslen(FileExtension) * sizeof(WCHAR);
 840       FileExtension[0] = 0;
 841    }
 842
 843    /*
 844     * Determine the right device object
 845     */
 846    /* Use IopRootDeviceNode for now */
 847    Status = IopCreateDeviceNode(IopRootDeviceNode, NULL, &ServiceName, &DeviceNode);
 848    if (!NT_SUCCESS(Status))
 849    {
 850       DPRINT1("Driver '%wZ' load failed, status (%x)\n", ModuleName, Status);
 851       return(Status);
 852    }
 853
 854    /*
 855     * Initialize the driver
 856     */
 857    Status = IopInitializeDriverModule(DeviceNode, LdrEntry,
 858       &DeviceNode->ServiceName, FALSE, &DriverObject);
 859
 860    if (!NT_SUCCESS(Status))
 861    {
 862       IopFreeDeviceNode(DeviceNode);
 863       return Status;
 864    }
 865
 866    Status = IopInitializeDevice(DeviceNode, DriverObject);
 867    if (NT_SUCCESS(Status))
 868    {
 869       Status = IopStartDevice(DeviceNode);
 870    }
 871
 872    return Status;
 873 }
 874
 875 /*
 876  * IopInitializeBootDrivers
 877  *
 878  * Initialize boot drivers and free memory for boot files.
 879  *
 880  * Parameters
 881  *    None
 882  *
 883  * Return Value
 884  *    None
 885  */
 886 VOID
 887 FASTCALL
 888 INIT_FUNCTION
 889 IopInitializeBootDrivers(VOID)
 890 {
 891     PLIST_ENTRY ListHead, NextEntry, NextEntry2;
 892     PLDR_DATA_TABLE_ENTRY LdrEntry;
 893     PDEVICE_NODE DeviceNode;
 894     PDRIVER_OBJECT DriverObject;
 895     LDR_DATA_TABLE_ENTRY ModuleObject;
 896     NTSTATUS Status;
 897     UNICODE_STRING DriverName;
 898     ULONG i, Index;
 899     PDRIVER_INFORMATION DriverInfo, DriverInfoTag;
 900     HANDLE KeyHandle;
 901     PBOOT_DRIVER_LIST_ENTRY BootEntry;
 902     DPRINT("IopInitializeBootDrivers()\n");
 903
 904     /* Use IopRootDeviceNode for now */
 905     Status = IopCreateDeviceNode(IopRootDeviceNode, NULL, NULL, &DeviceNode);
 906     if (!NT_SUCCESS(Status)) return;
 907
 908     /* Setup the module object for the RAW FS Driver */
 909     ModuleObject.DllBase = NULL;
 910     ModuleObject.SizeOfImage = 0;
 911     ModuleObject.EntryPoint = RawFsDriverEntry;
 912     RtlInitUnicodeString(&DriverName, L"RAW");
 913
 914     /* Initialize it */
 915     Status = IopInitializeDriverModule(DeviceNode,
 916                                        &ModuleObject,
 917                                        &DriverName,
 918                                        TRUE,
 919                                        &DriverObject);
 920     if (!NT_SUCCESS(Status))
 921     {
 922         /* Fail */
 923         IopFreeDeviceNode(DeviceNode);
 924         return;
 925     }
 926
 927     /* Now initialize the associated device */
 928     Status = IopInitializeDevice(DeviceNode, DriverObject);
 929     if (!NT_SUCCESS(Status))
 930     {
 931         /* Fail */
 932         IopFreeDeviceNode(DeviceNode);
 933         return;
 934     }
 935
 936     /* Start it up */
 937     Status = IopStartDevice(DeviceNode);
 938     if (!NT_SUCCESS(Status))
 939     {
 940         /* Fail */
 941         IopFreeDeviceNode(DeviceNode);
 942         return;
 943     }
 944
 945     /* Get highest group order index */
 946     IopGroupIndex = PpInitGetGroupOrderIndex(NULL);
 947     if (IopGroupIndex == 0xFFFF) ASSERT(FALSE);
 948
 949     /* Allocate the group table */
 950     IopGroupTable = ExAllocatePoolWithTag(PagedPool,
 951                                           IopGroupIndex * sizeof(LIST_ENTRY),
 952                                           TAG_IO);
 953     if (IopGroupTable == NULL) ASSERT(FALSE);
 954
 955     /* Initialize the group table lists */
 956     for (i = 0; i < IopGroupIndex; i++) InitializeListHead(&IopGroupTable[i]);
 957
 958     /* Loop the boot modules */
 959     ListHead = &KeLoaderBlock->LoadOrderListHead;
 960     NextEntry = ListHead->Flink;
 961     while (ListHead != NextEntry)
 962     {
 963         /* Get the entry */
 964         LdrEntry = CONTAINING_RECORD(NextEntry,
 965                                      LDR_DATA_TABLE_ENTRY,
 966                                      InLoadOrderLinks);
 967
 968         /* Check if the DLL needs to be initialized */
 969         if (LdrEntry->Flags & LDRP_DRIVER_DEPENDENT_DLL)
 970         {
 971             /* Call its entrypoint */
 972             MmCallDllInitialize(LdrEntry, NULL);
 973         }
 974
 975         /* Go to the next driver */
 976         NextEntry = NextEntry->Flink;
 977     }
 978
 979     /* Loop the boot drivers */
 980     ListHead = &KeLoaderBlock->BootDriverListHead;
 981     NextEntry = ListHead->Flink;
 982     while (ListHead != NextEntry)
 983     {
 984         /* Get the entry */
 985         BootEntry = CONTAINING_RECORD(NextEntry,
 986                                       BOOT_DRIVER_LIST_ENTRY,
 987                                       Link);
 988
 989         /* Get the driver loader entry */
 990         LdrEntry = BootEntry->LdrEntry;
 991
 992         /* Allocate our internal accounting structure */
 993         DriverInfo = ExAllocatePoolWithTag(PagedPool,
 994                                            sizeof(DRIVER_INFORMATION),
 995                                            TAG_IO);
 996         if (DriverInfo)
 997         {
 998             /* Zero it and initialize it */
 999             RtlZeroMemory(DriverInfo, sizeof(DRIVER_INFORMATION));
1000             InitializeListHead(&DriverInfo->Link);
1001             DriverInfo->DataTableEntry = BootEntry;
1002
1003             /* Open the registry key */
1004             Status = IopOpenRegistryKeyEx(&KeyHandle,
1005                                           NULL,
1006                                           &BootEntry->RegistryPath,
1007                                           KEY_READ);
1008             if ((NT_SUCCESS(Status)) || /* ReactOS HACK for SETUPLDR */
1009                 ((KeLoaderBlock->SetupLdrBlock) && ((KeyHandle = (PVOID)1)))) // yes, it's an assignment!
1010             {
1011                 /* Save the handle */
1012                 DriverInfo->ServiceHandle = KeyHandle;
1013
1014                 /* Get the group oder index */
1015                 Index = PpInitGetGroupOrderIndex(KeyHandle);
1016
1017                 /* Get the tag position */
1018                 DriverInfo->TagPosition = PipGetDriverTagPriority(KeyHandle);
1019
1020                 /* Insert it into the list, at the right place */
1021                 ASSERT(Index < IopGroupIndex);
1022                 NextEntry2 = IopGroupTable[Index].Flink;
1023                 while (NextEntry2 != &IopGroupTable[Index])
1024                 {
1025                     /* Get the driver info */
1026                     DriverInfoTag = CONTAINING_RECORD(NextEntry2,
1027                                                       DRIVER_INFORMATION,
1028                                                       Link);
1029
1030                     /* Check if we found the right tag position */
1031                     if (DriverInfoTag->TagPosition > DriverInfo->TagPosition)
1032                     {
1033                         /* We're done */
1034                         break;
1035                     }
1036
1037                     /* Next entry */
1038                     NextEntry2 = NextEntry2->Flink;
1039                 }
1040
1041                 /* Insert us right before the next entry */
1042                 NextEntry2 = NextEntry2->Blink;
1043                 InsertHeadList(NextEntry2, &DriverInfo->Link);
1044             }
1045         }
1046
1047         /* Go to the next driver */
1048         NextEntry = NextEntry->Flink;
1049     }
1050
1051     /* Loop each group index */
1052     for (i = 0; i < IopGroupIndex; i++)
1053     {
1054         /* Loop each group table */
1055         NextEntry = IopGroupTable[i].Flink;
1056         while (NextEntry != &IopGroupTable[i])
1057         {
1058             /* Get the entry */
1059             DriverInfo = CONTAINING_RECORD(NextEntry,
1060                                            DRIVER_INFORMATION,
1061                                            Link);
1062
1063             /* Get the driver loader entry */
1064             LdrEntry = DriverInfo->DataTableEntry->LdrEntry;
1065
1066             /* Initialize it */
1067             IopInitializeBuiltinDriver(LdrEntry);
1068
1069             /* Next entry */
1070             NextEntry = NextEntry->Flink;
1071         }
1072     }
1073
1074     /* In old ROS, the loader list became empty after this point. Simulate. */
1075     InitializeListHead(&KeLoaderBlock->LoadOrderListHead);
1076 }
1077
1078 VOID
1079 FASTCALL
1080 INIT_FUNCTION
1081 IopInitializeSystemDrivers(VOID)
1082 {
1083     PUNICODE_STRING *DriverList, *SavedList;
1084
1085     /* No system drivers on the boot cd */
1086     if (KeLoaderBlock->SetupLdrBlock) return;
1087
1088     /* Get the driver list */
1089     SavedList = DriverList = CmGetSystemDriverList();
1090     ASSERT(DriverList);
1091
1092     /* Loop it */
1093     while (*DriverList)
1094     {
1095         /* Load the driver */
1096         ZwLoadDriver(*DriverList);
1097
1098         /* Free the entry */
1099         RtlFreeUnicodeString(*DriverList);
1100         ExFreePool(*DriverList);
1101
1102         /* Next entry */
1103         InbvIndicateProgress();
1104         DriverList++;
1105     }
1106
1107     /* Free the list */
1108     ExFreePool(SavedList);
1109 }
1110
1111 /*
1112  * IopUnloadDriver
1113  *
1114  * Unloads a device driver.
1115  *
1116  * Parameters
1117  *    DriverServiceName
1118  *       Name of the service to unload (registry key).
1119  *
1120  *    UnloadPnpDrivers
1121  *       Whether to unload Plug & Plug or only legacy drivers. If this
1122  *       parameter is set to FALSE, the routine will unload only legacy
1123  *       drivers.
1124  *
1125  * Return Value
1126  *    Status
1127  *
1128  * To do
1129  *    Guard the whole function by SEH.
1130  */
1131
1132 NTSTATUS NTAPI
1133 IopUnloadDriver(PUNICODE_STRING DriverServiceName, BOOLEAN UnloadPnpDrivers)
1134 {
1135    RTL_QUERY_REGISTRY_TABLE QueryTable[2];
1136    UNICODE_STRING ImagePath;
1137    UNICODE_STRING ServiceName;
1138    UNICODE_STRING ObjectName;
1139    PDRIVER_OBJECT DriverObject;
1140    PDEVICE_OBJECT DeviceObject;
1141    PEXTENDED_DEVOBJ_EXTENSION DeviceExtension;
1142    LOAD_UNLOAD_PARAMS LoadParams;
1143    NTSTATUS Status;
1144    LPWSTR Start;
1145    BOOLEAN SafeToUnload = TRUE;
1146
1147    DPRINT("IopUnloadDriver('%wZ', %d)\n", DriverServiceName, UnloadPnpDrivers);
1148
1149    PAGED_CODE();
1150
1151    /*
1152     * Get the service name from the registry key name
1153     */
1154
1155    Start = wcsrchr(DriverServiceName->Buffer, L'\\');
1156    if (Start == NULL)
1157       Start = DriverServiceName->Buffer;
1158    else
1159       Start++;
1160
1161    RtlInitUnicodeString(&ServiceName, Start);
1162
1163    /*
1164     * Construct the driver object name
1165     */
1166
1167    ObjectName.Length = (wcslen(Start) + 8) * sizeof(WCHAR);
1168    ObjectName.MaximumLength = ObjectName.Length + sizeof(WCHAR);
1169    ObjectName.Buffer = ExAllocatePool(PagedPool, ObjectName.MaximumLength);
1170    if (!ObjectName.Buffer) return STATUS_INSUFFICIENT_RESOURCES;
1171    wcscpy(ObjectName.Buffer, L"\\Driver\\");
1172    memcpy(ObjectName.Buffer + 8, Start, ObjectName.Length - 8 * sizeof(WCHAR));
1173    ObjectName.Buffer[ObjectName.Length/sizeof(WCHAR)] = 0;
1174
1175    /*
1176     * Find the driver object
1177     */
1178    Status = ObReferenceObjectByName(&ObjectName,
1179                                     0,
1180                                     0,
1181                                     0,
1182                                     IoDriverObjectType,
1183                                     KernelMode,
1184                                     0,
1185                                     (PVOID*)&DriverObject);
1186
1187    if (!NT_SUCCESS(Status))
1188    {
1189       DPRINT1("Can't locate driver object for %wZ\n", &ObjectName);
1190       ExFreePool(ObjectName.Buffer);
1191       return Status;
1192    }
1193
1194    /*
1195     * Free the buffer for driver object name
1196     */
1197    ExFreePool(ObjectName.Buffer);
1198
1199    /* Check that driver is not already unloading */
1200    if (DriverObject->Flags & DRVO_UNLOAD_INVOKED)
1201    {
1202        DPRINT1("Driver deletion pending\n");
1203        ObDereferenceObject(DriverObject);
1204        return STATUS_DELETE_PENDING;
1205    }
1206
1207    /*
1208     * Get path of service...
1209     */
1210
1211    RtlZeroMemory(QueryTable, sizeof(QueryTable));
1212
1213    RtlInitUnicodeString(&ImagePath, NULL);
1214
1215    QueryTable[0].Name = L"ImagePath";
1216    QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
1217    QueryTable[0].EntryContext = &ImagePath;
1218
1219    Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
1220        DriverServiceName->Buffer, QueryTable, NULL, NULL);
1221
1222    if (!NT_SUCCESS(Status))
1223    {
1224       DPRINT1("RtlQueryRegistryValues() failed (Status %x)\n", Status);
1225       ObDereferenceObject(DriverObject);
1226       return Status;
1227    }
1228
1229    /*
1230     * Normalize the image path for all later processing.
1231     */
1232
1233    Status = IopNormalizeImagePath(&ImagePath, &ServiceName);
1234
1235    if (!NT_SUCCESS(Status))
1236    {
1237       DPRINT1("IopNormalizeImagePath() failed (Status %x)\n", Status);
1238       ObDereferenceObject(DriverObject);
1239       return Status;
1240    }
1241
1242    /*
1243     * Free the service path
1244     */
1245
1246    ExFreePool(ImagePath.Buffer);
1247
1248    /*
1249     * Unload the module and release the references to the device object
1250     */
1251
1252     /* Call the load/unload routine, depending on current process */
1253    if (DriverObject->DriverUnload && DriverObject->DriverSection)
1254    {
1255       /* Loop through each device object of the driver
1256          and set DOE_UNLOAD_PENDING flag */
1257       DeviceObject = DriverObject->DeviceObject;
1258       while (DeviceObject)
1259       {
1260          /* Set the unload pending flag for the device */
1261          DeviceExtension = IoGetDevObjExtension(DeviceObject);
1262          DeviceExtension->ExtensionFlags |= DOE_UNLOAD_PENDING;
1263
1264          /* Make sure there are no attached devices or no reference counts */
1265          if ((DeviceObject->ReferenceCount) || (DeviceObject->AttachedDevice))
1266          {
1267             /* Not safe to unload */
1268             DPRINT1("Drivers device object is referenced or has attached devices\n");
1269
1270             SafeToUnload = FALSE;
1271          }
1272
1273          DeviceObject = DeviceObject->NextDevice;
1274       }
1275
1276       /* If not safe to unload, then return success */
1277       if (!SafeToUnload)
1278       {
1279          ObDereferenceObject(DriverObject);
1280          return STATUS_SUCCESS;
1281       }
1282
1283       /* Set the unload invoked flag */
1284       DriverObject->Flags |= DRVO_UNLOAD_INVOKED;
1285
1286       if (PsGetCurrentProcess() == PsInitialSystemProcess)
1287       {
1288          /* Just call right away */
1289          (*DriverObject->DriverUnload)(DriverObject);
1290       }
1291       else
1292       {
1293          /* Load/Unload must be called from system process */
1294
1295          /* Prepare parameters block */
1296          LoadParams.DriverObject = DriverObject;
1297          KeInitializeEvent(&LoadParams.Event, NotificationEvent, FALSE);
1298
1299          ExInitializeWorkItem(&LoadParams.WorkItem,
1300              (PWORKER_THREAD_ROUTINE)IopLoadUnloadDriver,
1301              (PVOID)&LoadParams);
1302
1303          /* Queue it */
1304          ExQueueWorkItem(&LoadParams.WorkItem, DelayedWorkQueue);
1305
1306          /* And wait when it completes */
1307          KeWaitForSingleObject(&LoadParams.Event, UserRequest, KernelMode,
1308              FALSE, NULL);
1309       }
1310
1311       /* Mark the driver object temporary, so it could be deleted later */
1312       ObMakeTemporaryObject(DriverObject);
1313
1314       /* Dereference it 2 times */
1315       ObDereferenceObject(DriverObject);
1316       ObDereferenceObject(DriverObject);
1317
1318       return STATUS_SUCCESS;
1319    }
1320    else
1321    {
1322       /* Dereference one time (refd inside this function) */
1323       ObDereferenceObject(DriverObject);
1324
1325       /* Return unloading failure */
1326       return STATUS_INVALID_DEVICE_REQUEST;
1327    }
1328 }
1329
1330 VOID
1331 NTAPI
1332 IopReinitializeDrivers(VOID)
1333 {
1334     PDRIVER_REINIT_ITEM ReinitItem;
1335     PLIST_ENTRY Entry;
1336
1337     /* Get the first entry and start looping */
1338     Entry = ExInterlockedRemoveHeadList(&DriverReinitListHead,
1339                                         &DriverReinitListLock);
1340     while (Entry)
1341     {
1342         /* Get the item*/
1343         ReinitItem = CONTAINING_RECORD(Entry, DRIVER_REINIT_ITEM, ItemEntry);
1344
1345         /* Increment reinitialization counter */
1346         ReinitItem->DriverObject->DriverExtension->Count++;
1347
1348         /* Remove the device object flag */
1349         ReinitItem->DriverObject->Flags &= ~DRVO_REINIT_REGISTERED;
1350
1351         /* Call the routine */
1352         ReinitItem->ReinitRoutine(ReinitItem->DriverObject,
1353                                   ReinitItem->Context,
1354                                   ReinitItem->DriverObject->
1355                                   DriverExtension->Count);
1356
1357         /* Free the entry */
1358         ExFreePool(Entry);
1359
1360         /* Move to the next one */
1361         Entry = ExInterlockedRemoveHeadList(&DriverReinitListHead,
1362                                             &DriverReinitListLock);
1363     }
1364 }
1365
1366 VOID
1367 NTAPI
1368 IopReinitializeBootDrivers(VOID)
1369 {
1370     PDRIVER_REINIT_ITEM ReinitItem;
1371     PLIST_ENTRY Entry;
1372
1373     /* Get the first entry and start looping */
1374     Entry = ExInterlockedRemoveHeadList(&DriverBootReinitListHead,
1375                                         &DriverBootReinitListLock);
1376     while (Entry)
1377     {
1378         /* Get the item*/
1379         ReinitItem = CONTAINING_RECORD(Entry, DRIVER_REINIT_ITEM, ItemEntry);
1380
1381         /* Increment reinitialization counter */
1382         ReinitItem->DriverObject->DriverExtension->Count++;
1383
1384         /* Remove the device object flag */
1385         ReinitItem->DriverObject->Flags &= ~DRVO_BOOTREINIT_REGISTERED;
1386
1387         /* Call the routine */
1388         ReinitItem->ReinitRoutine(ReinitItem->DriverObject,
1389                                   ReinitItem->Context,
1390                                   ReinitItem->DriverObject->
1391                                   DriverExtension->Count);
1392
1393         /* Free the entry */
1394         ExFreePool(Entry);
1395
1396         /* Move to the next one */
1397         Entry = ExInterlockedRemoveHeadList(&DriverBootReinitListHead,
1398                                             &DriverBootReinitListLock);
1399     }
1400 }
1401
1402 NTSTATUS
1403 NTAPI
1404 IopCreateDriver(IN PUNICODE_STRING DriverName OPTIONAL,
1405                 IN PDRIVER_INITIALIZE InitializationFunction,
1406                 IN PUNICODE_STRING RegistryPath,
1407                 PLDR_DATA_TABLE_ENTRY ModuleObject,
1408                 OUT PDRIVER_OBJECT *pDriverObject)
1409 {
1410     WCHAR NameBuffer[100];
1411     USHORT NameLength;
1412     UNICODE_STRING LocalDriverName;
1413     NTSTATUS Status;
1414     OBJECT_ATTRIBUTES ObjectAttributes;
1415     ULONG ObjectSize;
1416     PDRIVER_OBJECT DriverObject;
1417     UNICODE_STRING ServiceKeyName;
1418     HANDLE hDriver;
1419     ULONG i, RetryCount = 0;
1420
1421 try_again:
1422     /* First, create a unique name for the driver if we don't have one */
1423     if (!DriverName)
1424     {
1425         /* Create a random name and set up the string*/
1426         NameLength = (USHORT)swprintf(NameBuffer,
1427                                       L"\\Driver\\%08u",
1428                                       KeTickCount);
1429         LocalDriverName.Length = NameLength * sizeof(WCHAR);
1430         LocalDriverName.MaximumLength = LocalDriverName.Length + sizeof(UNICODE_NULL);
1431         LocalDriverName.Buffer = NameBuffer;
1432     }
1433     else
1434     {
1435         /* So we can avoid another code path, use a local var */
1436         LocalDriverName = *DriverName;
1437     }
1438
1439     /* Initialize the Attributes */
1440     ObjectSize = sizeof(DRIVER_OBJECT) + sizeof(EXTENDED_DRIVER_EXTENSION);
1441     InitializeObjectAttributes(&ObjectAttributes,
1442                                &LocalDriverName,
1443                                OBJ_PERMANENT | OBJ_CASE_INSENSITIVE,
1444                                NULL,
1445                                NULL);
1446
1447     /* Create the Object */
1448     Status = ObCreateObject(KernelMode,
1449                             IoDriverObjectType,
1450                             &ObjectAttributes,
1451                             KernelMode,
1452                             NULL,
1453                             ObjectSize,
1454                             0,
1455                             0,
1456                             (PVOID*)&DriverObject);
1457     if (!NT_SUCCESS(Status)) return Status;
1458
1459     DPRINT("IopCreateDriver(): created DO %p\n", DriverObject);
1460
1461     /* Set up the Object */
1462     RtlZeroMemory(DriverObject, ObjectSize);
1463     DriverObject->Type = IO_TYPE_DRIVER;
1464     DriverObject->Size = sizeof(DRIVER_OBJECT);
1465     DriverObject->Flags = DRVO_LEGACY_DRIVER;//DRVO_BUILTIN_DRIVER;
1466     DriverObject->DriverExtension = (PDRIVER_EXTENSION)(DriverObject + 1);
1467     DriverObject->DriverExtension->DriverObject = DriverObject;
1468     DriverObject->DriverInit = InitializationFunction;
1469     DriverObject->DriverSection = ModuleObject;
1470     /* Loop all Major Functions */
1471     for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++)
1472     {
1473         /* Invalidate each function */
1474         DriverObject->MajorFunction[i] = IopInvalidDeviceRequest;
1475     }
1476
1477     /* Set up the service key name buffer */
1478     ServiceKeyName.Buffer = ExAllocatePoolWithTag(PagedPool,
1479                                                   LocalDriverName.Length +
1480                                                   sizeof(WCHAR),
1481                                                   TAG_IO);
1482     if (!ServiceKeyName.Buffer)
1483     {
1484         /* Fail */
1485         ObMakeTemporaryObject(DriverObject);
1486         ObDereferenceObject(DriverObject);
1487         return STATUS_INSUFFICIENT_RESOURCES;
1488     }
1489
1490     /* Fill out the key data and copy the buffer */
1491     ServiceKeyName.Length = LocalDriverName.Length;
1492     ServiceKeyName.MaximumLength = LocalDriverName.MaximumLength;
1493     RtlCopyMemory(ServiceKeyName.Buffer,
1494                   LocalDriverName.Buffer,
1495                   LocalDriverName.Length);
1496
1497     /* Null-terminate it and set it */
1498     ServiceKeyName.Buffer[ServiceKeyName.Length / sizeof(WCHAR)] = UNICODE_NULL;
1499     DriverObject->DriverExtension->ServiceKeyName = ServiceKeyName;
1500
1501     /* Also store it in the Driver Object. This is a bit of a hack. */
1502     RtlCopyMemory(&DriverObject->DriverName,
1503                   &ServiceKeyName,
1504                   sizeof(UNICODE_STRING));
1505
1506     /* Add the Object and get its handle */
1507     Status = ObInsertObject(DriverObject,
1508                             NULL,
1509                             FILE_READ_DATA,
1510                             0,
1511                             NULL,
1512                             &hDriver);
1513
1514     /* Eliminate small possibility when this function is called more than
1515        once in a row, and KeTickCount doesn't get enough time to change */
1516     if (!DriverName && (Status == STATUS_OBJECT_NAME_COLLISION) && (RetryCount < 100))
1517     {
1518         RetryCount++;
1519         goto try_again;
1520     }
1521
1522     if (!NT_SUCCESS(Status)) return Status;
1523
1524     /* Now reference it */
1525     Status = ObReferenceObjectByHandle(hDriver,
1526                                        0,
1527                                        IoDriverObjectType,
1528                                        KernelMode,
1529                                        (PVOID*)&DriverObject,
1530                                        NULL);
1531     if (!NT_SUCCESS(Status))
1532     {
1533         /* Fail */
1534         ObMakeTemporaryObject(DriverObject);
1535         ObDereferenceObject(DriverObject);
1536         return Status;
1537     }
1538
1539     /* Close the extra handle */
1540     ZwClose(hDriver);
1541
1542     DriverObject->HardwareDatabase = &IopHardwareDatabaseKey;
1543     DriverObject->DriverStart = ModuleObject ? ModuleObject->DllBase : 0;
1544     DriverObject->DriverSize = ModuleObject ? ModuleObject->SizeOfImage : 0;
1545
1546     /* Finally, call its init function */
1547     DPRINT("RegistryKey: %wZ\n", RegistryPath);
1548     DPRINT("Calling driver entrypoint at %p\n", InitializationFunction);
1549     Status = (*InitializationFunction)(DriverObject, RegistryPath);
1550     if (!NT_SUCCESS(Status))
1551     {
1552         /* If it didn't work, then kill the object */
1553         DPRINT1("'%wZ' initialization failed, status (0x%08lx)\n", DriverName, Status);
1554         DriverObject->DriverSection = NULL;
1555         ObMakeTemporaryObject(DriverObject);
1556         ObDereferenceObject(DriverObject);
1557     }
1558     else
1559     {
1560         /* Returns to caller the object */
1561         *pDriverObject = DriverObject;
1562     }
1563
1564     /* Loop all Major Functions */
1565     for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++)
1566     {
1567         /*
1568          * Make sure the driver didn't set any dispatch entry point to NULL!
1569          * Doing so is illegal; drivers shouldn't touch entry points they
1570          * do not implement.
1571          */
1572
1573         /* Check if it did so anyway */
1574         if (!DriverObject->MajorFunction[i])
1575         {
1576             /* Print a warning in the debug log */
1577             DPRINT1("Driver <%wZ> set DriverObject->MajorFunction[%d] to NULL!\n",
1578                     &DriverObject->DriverName, i);
1579
1580             /* Fix it up */
1581             DriverObject->MajorFunction[i] = IopInvalidDeviceRequest;
1582         }
1583     }
1584
1585     /* Return the Status */
1586     return Status;
1587 }
1588
1589 /* PUBLIC FUNCTIONS ***********************************************************/
1590
1591 /*
1592  * @implemented
1593  */
1594 NTSTATUS
1595 NTAPI
1596 IoCreateDriver(IN PUNICODE_STRING DriverName OPTIONAL,
1597                IN PDRIVER_INITIALIZE InitializationFunction)
1598 {
1599    PDRIVER_OBJECT DriverObject;
1600    return IopCreateDriver(DriverName, InitializationFunction, NULL, NULL, &DriverObject);
1601 }
1602
1603 /*
1604  * @implemented
1605  */
1606 VOID
1607 NTAPI
1608 IoDeleteDriver(IN PDRIVER_OBJECT DriverObject)
1609 {
1610     /* Simply dereference the Object */
1611     ObDereferenceObject(DriverObject);
1612 }
1613
1614 /*
1615  * @implemented
1616  */
1617 VOID
1618 NTAPI
1619 IoRegisterBootDriverReinitialization(IN PDRIVER_OBJECT DriverObject,
1620                                      IN PDRIVER_REINITIALIZE ReinitRoutine,
1621                                      IN PVOID Context)
1622 {
1623     PDRIVER_REINIT_ITEM ReinitItem;
1624
1625     /* Allocate the entry */
1626     ReinitItem = ExAllocatePoolWithTag(NonPagedPool,
1627                                        sizeof(DRIVER_REINIT_ITEM),
1628                                        TAG_REINIT);
1629     if (!ReinitItem) return;
1630
1631     /* Fill it out */
1632     ReinitItem->DriverObject = DriverObject;
1633     ReinitItem->ReinitRoutine = ReinitRoutine;
1634     ReinitItem->Context = Context;
1635
1636     /* Set the Driver Object flag and insert the entry into the list */
1637     DriverObject->Flags |= DRVO_BOOTREINIT_REGISTERED;
1638     ExInterlockedInsertTailList(&DriverBootReinitListHead,
1639                                 &ReinitItem->ItemEntry,
1640                                 &DriverBootReinitListLock);
1641 }
1642
1643 /*
1644  * @implemented
1645  */
1646 VOID
1647 NTAPI
1648 IoRegisterDriverReinitialization(IN PDRIVER_OBJECT DriverObject,
1649                                  IN PDRIVER_REINITIALIZE ReinitRoutine,
1650                                  IN PVOID Context)
1651 {
1652     PDRIVER_REINIT_ITEM ReinitItem;
1653
1654     /* Allocate the entry */
1655     ReinitItem = ExAllocatePoolWithTag(NonPagedPool,
1656                                        sizeof(DRIVER_REINIT_ITEM),
1657                                        TAG_REINIT);
1658     if (!ReinitItem) return;
1659
1660     /* Fill it out */
1661     ReinitItem->DriverObject = DriverObject;
1662     ReinitItem->ReinitRoutine = ReinitRoutine;
1663     ReinitItem->Context = Context;
1664
1665     /* Set the Driver Object flag and insert the entry into the list */
1666     DriverObject->Flags |= DRVO_REINIT_REGISTERED;
1667     ExInterlockedInsertTailList(&DriverReinitListHead,
1668                                 &ReinitItem->ItemEntry,
1669                                 &DriverReinitListLock);
1670 }
1671
1672 /*
1673  * @implemented
1674  */
1675 NTSTATUS
1676 NTAPI
1677 IoAllocateDriverObjectExtension(IN PDRIVER_OBJECT DriverObject,
1678                                 IN PVOID ClientIdentificationAddress,
1679                                 IN ULONG DriverObjectExtensionSize,
1680                                 OUT PVOID *DriverObjectExtension)
1681 {
1682     KIRQL OldIrql;
1683     PIO_CLIENT_EXTENSION DriverExtensions, NewDriverExtension;
1684     BOOLEAN Inserted = FALSE;
1685
1686     /* Assume failure */
1687     *DriverObjectExtension = NULL;
1688
1689     /* Allocate the extension */
1690     NewDriverExtension = ExAllocatePoolWithTag(NonPagedPool,
1691                                                sizeof(IO_CLIENT_EXTENSION) +
1692                                                DriverObjectExtensionSize,
1693                                                TAG_DRIVER_EXTENSION);
1694     if (!NewDriverExtension) return STATUS_INSUFFICIENT_RESOURCES;
1695
1696     /* Clear the extension for teh caller */
1697     RtlZeroMemory(NewDriverExtension,
1698                   sizeof(IO_CLIENT_EXTENSION) + DriverObjectExtensionSize);
1699
1700     /* Acqure lock */
1701     OldIrql = KeRaiseIrqlToDpcLevel();
1702
1703     /* Fill out the extension */
1704     NewDriverExtension->ClientIdentificationAddress = ClientIdentificationAddress;
1705
1706     /* Loop the current extensions */
1707     DriverExtensions = IoGetDrvObjExtension(DriverObject)->
1708                        ClientDriverExtension;
1709     while (DriverExtensions)
1710     {
1711         /* Check if the identifier matches */
1712         if (DriverExtensions->ClientIdentificationAddress ==
1713             ClientIdentificationAddress)
1714         {
1715             /* We have a collision, break out */
1716             break;
1717         }
1718
1719         /* Go to the next one */
1720         DriverExtensions = DriverExtensions->NextExtension;
1721     }
1722
1723     /* Check if we didn't collide */
1724     if (!DriverExtensions)
1725     {
1726         /* Link this one in */
1727         NewDriverExtension->NextExtension =
1728             IoGetDrvObjExtension(DriverObject)->ClientDriverExtension;
1729         IoGetDrvObjExtension(DriverObject)->ClientDriverExtension =
1730             NewDriverExtension;
1731         Inserted = TRUE;
1732     }
1733
1734     /* Release the lock */
1735     KeLowerIrql(OldIrql);
1736
1737     /* Check if insertion failed */
1738     if (!Inserted)
1739     {
1740         /* Free the entry and fail */
1741         ExFreePool(NewDriverExtension);
1742         return STATUS_OBJECT_NAME_COLLISION;
1743     }
1744
1745     /* Otherwise, return the pointer */
1746     *DriverObjectExtension = NewDriverExtension + 1;
1747     return STATUS_SUCCESS;
1748 }
1749
1750 /*
1751  * @implemented
1752  */
1753 PVOID
1754 NTAPI
1755 IoGetDriverObjectExtension(IN PDRIVER_OBJECT DriverObject,
1756                            IN PVOID ClientIdentificationAddress)
1757 {
1758     KIRQL OldIrql;
1759     PIO_CLIENT_EXTENSION DriverExtensions;
1760
1761     /* Acquire lock */
1762     OldIrql = KeRaiseIrqlToDpcLevel();
1763
1764     /* Loop the list until we find the right one */
1765     DriverExtensions = IoGetDrvObjExtension(DriverObject)->ClientDriverExtension;
1766     while (DriverExtensions)
1767     {
1768         /* Check for a match */
1769         if (DriverExtensions->ClientIdentificationAddress ==
1770             ClientIdentificationAddress)
1771         {
1772             /* Break out */
1773             break;
1774         }
1775
1776         /* Keep looping */
1777         DriverExtensions = DriverExtensions->NextExtension;
1778     }
1779
1780     /* Release lock */
1781     KeLowerIrql(OldIrql);
1782
1783     /* Return nothing or the extension */
1784     if (!DriverExtensions) return NULL;
1785     return DriverExtensions + 1;
1786 }
1787
1788 VOID NTAPI
1789 IopLoadUnloadDriver(PLOAD_UNLOAD_PARAMS LoadParams)
1790 {
1791    RTL_QUERY_REGISTRY_TABLE QueryTable[3];
1792    UNICODE_STRING ImagePath;
1793    UNICODE_STRING ServiceName;
1794    NTSTATUS Status;
1795    ULONG Type;
1796    PDEVICE_NODE DeviceNode;
1797    PDRIVER_OBJECT DriverObject;
1798    PLDR_DATA_TABLE_ENTRY ModuleObject;
1799    PVOID BaseAddress;
1800    WCHAR *cur;
1801
1802    /* Check if it's an unload request */
1803    if (LoadParams->DriverObject)
1804    {
1805        (*LoadParams->DriverObject->DriverUnload)(LoadParams->DriverObject);
1806
1807        /* Return success and signal the event */
1808        LoadParams->Status = STATUS_SUCCESS;
1809       (VOID)KeSetEvent(&LoadParams->Event, 0, FALSE);
1810        return;
1811    }
1812
1813    RtlInitUnicodeString(&ImagePath, NULL);
1814
1815    /*
1816     * Get the service name from the registry key name.
1817     */
1818    ASSERT(LoadParams->ServiceName->Length >= sizeof(WCHAR));
1819
1820    ServiceName = *LoadParams->ServiceName;
1821    cur = LoadParams->ServiceName->Buffer +
1822        (LoadParams->ServiceName->Length / sizeof(WCHAR)) - 1;
1823    while (LoadParams->ServiceName->Buffer != cur)
1824    {
1825       if(*cur == L'\\')
1826       {
1827          ServiceName.Buffer = cur + 1;
1828          ServiceName.Length = LoadParams->ServiceName->Length -
1829                               (USHORT)((ULONG_PTR)ServiceName.Buffer -
1830                                        (ULONG_PTR)LoadParams->ServiceName->Buffer);
1831          break;
1832       }
1833       cur--;
1834    }
1835
1836    /*
1837     * Get service type.
1838     */
1839
1840    RtlZeroMemory(&QueryTable, sizeof(QueryTable));
1841
1842    RtlInitUnicodeString(&ImagePath, NULL);
1843
1844    QueryTable[0].Name = L"Type";
1845    QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_REQUIRED;
1846    QueryTable[0].EntryContext = &Type;
1847
1848    QueryTable[1].Name = L"ImagePath";
1849    QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT;
1850    QueryTable[1].EntryContext = &ImagePath;
1851
1852    Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
1853       LoadParams->ServiceName->Buffer, QueryTable, NULL, NULL);
1854
1855    if (!NT_SUCCESS(Status))
1856    {
1857       DPRINT("RtlQueryRegistryValues() failed (Status %lx)\n", Status);
1858       if (ImagePath.Buffer)
1859          ExFreePool(ImagePath.Buffer);
1860       LoadParams->Status = Status;
1861       (VOID)KeSetEvent(&LoadParams->Event, 0, FALSE);
1862       return;
1863    }
1864
1865    /*
1866     * Normalize the image path for all later processing.
1867     */
1868
1869    Status = IopNormalizeImagePath(&ImagePath, &ServiceName);
1870
1871    if (!NT_SUCCESS(Status))
1872    {
1873       DPRINT("IopNormalizeImagePath() failed (Status %x)\n", Status);
1874       LoadParams->Status = Status;
1875       (VOID)KeSetEvent(&LoadParams->Event, 0, FALSE);
1876       return;
1877    }
1878
1879    DPRINT("FullImagePath: '%wZ'\n", &ImagePath);
1880    DPRINT("Type: %lx\n", Type);
1881
1882    /* Get existing DriverObject pointer (in case the driver has
1883       already been loaded and initialized) */
1884    Status = IopGetDriverObject(
1885        &DriverObject,
1886        &ServiceName,
1887        (Type == 2 /* SERVICE_FILE_SYSTEM_DRIVER */ ||
1888         Type == 8 /* SERVICE_RECOGNIZER_DRIVER */));
1889
1890    if (!NT_SUCCESS(Status))
1891    {
1892        /*
1893         * Load the driver module
1894         */
1895
1896        Status = MmLoadSystemImage(&ImagePath, NULL, NULL, 0, (PVOID)&ModuleObject, &BaseAddress);
1897
1898        if (!NT_SUCCESS(Status) && Status != STATUS_IMAGE_ALREADY_LOADED)
1899        {
1900            DPRINT("MmLoadSystemImage() failed (Status %lx)\n", Status);
1901            LoadParams->Status = Status;
1902            (VOID)KeSetEvent(&LoadParams->Event, 0, FALSE);
1903            return;
1904        }
1905
1906        /*
1907         * Initialize the driver module if it's loaded for the first time
1908         */
1909        if (Status != STATUS_IMAGE_ALREADY_LOADED)
1910        {
1911            Status = IopCreateDeviceNode(IopRootDeviceNode, NULL, &ServiceName, &DeviceNode);
1912
1913            if (!NT_SUCCESS(Status))
1914            {
1915                DPRINT("IopCreateDeviceNode() failed (Status %lx)\n", Status);
1916                MmUnloadSystemImage(ModuleObject);
1917                LoadParams->Status = Status;
1918                (VOID)KeSetEvent(&LoadParams->Event, 0, FALSE);
1919                return;
1920            }
1921
1922            IopDisplayLoadingMessage(&DeviceNode->ServiceName);
1923
1924            Status = IopInitializeDriverModule(
1925                DeviceNode,
1926                ModuleObject,
1927                &DeviceNode->ServiceName,
1928                (Type == 2 /* SERVICE_FILE_SYSTEM_DRIVER */ ||
1929                Type == 8 /* SERVICE_RECOGNIZER_DRIVER */),
1930                &DriverObject);
1931
1932            if (!NT_SUCCESS(Status))
1933            {
1934                DPRINT("IopInitializeDriver() failed (Status %lx)\n", Status);
1935                MmUnloadSystemImage(ModuleObject);
1936                IopFreeDeviceNode(DeviceNode);
1937                LoadParams->Status = Status;
1938                (VOID)KeSetEvent(&LoadParams->Event, 0, FALSE);
1939                return;
1940            }
1941
1942            /* Initialize and start device */
1943            IopInitializeDevice(DeviceNode, DriverObject);
1944            Status = IopStartDevice(DeviceNode);
1945        }
1946    }
1947    else
1948    {
1949       DPRINT("DriverObject already exist in ObjectManager\n");
1950
1951       /* IopGetDriverObject references the DriverObject, so dereference it */
1952       ObDereferenceObject(DriverObject);
1953    }
1954
1955    /* Pass status to the caller and signal the event */
1956    LoadParams->Status = Status;
1957    (VOID)KeSetEvent(&LoadParams->Event, 0, FALSE);
1958 }
1959
1960 /*
1961  * NtLoadDriver
1962  *
1963  * Loads a device driver.
1964  *
1965  * Parameters
1966  *    DriverServiceName
1967  *       Name of the service to load (registry key).
1968  *
1969  * Return Value
1970  *    Status
1971  *
1972  * Status
1973  *    implemented
1974  */
1975 NTSTATUS NTAPI
1976 NtLoadDriver(IN PUNICODE_STRING DriverServiceName)
1977 {
1978     UNICODE_STRING CapturedDriverServiceName = { 0, 0, NULL };
1979     KPROCESSOR_MODE PreviousMode;
1980     LOAD_UNLOAD_PARAMS LoadParams;
1981     NTSTATUS Status;
1982
1983     PAGED_CODE();
1984
1985     PreviousMode = KeGetPreviousMode();
1986
1987     /*
1988     * Check security privileges
1989     */
1990
1991     /* FIXME: Uncomment when privileges will be correctly implemented. */
1992 #if 0
1993     if (!SeSinglePrivilegeCheck(SeLoadDriverPrivilege, PreviousMode))
1994     {
1995         DPRINT("Privilege not held\n");
1996         return STATUS_PRIVILEGE_NOT_HELD;
1997     }
1998 #endif
1999
2000     Status = ProbeAndCaptureUnicodeString(&CapturedDriverServiceName,
2001                                           PreviousMode,
2002                                           DriverServiceName);
2003     if (!NT_SUCCESS(Status))
2004     {
2005         return Status;
2006     }
2007
2008     DPRINT("NtLoadDriver('%wZ')\n", &CapturedDriverServiceName);
2009
2010     LoadParams.ServiceName = &CapturedDriverServiceName;
2011     LoadParams.DriverObject = NULL;
2012     KeInitializeEvent(&LoadParams.Event, NotificationEvent, FALSE);
2013
2014     /* Call the load/unload routine, depending on current process */
2015     if (PsGetCurrentProcess() == PsInitialSystemProcess)
2016     {
2017         /* Just call right away */
2018         IopLoadUnloadDriver(&LoadParams);
2019     }
2020     else
2021     {
2022         /* Load/Unload must be called from system process */
2023         ExInitializeWorkItem(&LoadParams.WorkItem,
2024                              (PWORKER_THREAD_ROUTINE)IopLoadUnloadDriver,
2025                              (PVOID)&LoadParams);
2026
2027         /* Queue it */
2028         ExQueueWorkItem(&LoadParams.WorkItem, DelayedWorkQueue);
2029
2030         /* And wait when it completes */
2031         KeWaitForSingleObject(&LoadParams.Event, UserRequest, KernelMode,
2032             FALSE, NULL);
2033     }
2034
2035     ReleaseCapturedUnicodeString(&CapturedDriverServiceName,
2036                                  PreviousMode);
2037
2038     return LoadParams.Status;
2039 }
2040
2041 /*
2042  * NtUnloadDriver
2043  *
2044  * Unloads a legacy device driver.
2045  *
2046  * Parameters
2047  *    DriverServiceName
2048  *       Name of the service to unload (registry key).
2049  *
2050  * Return Value
2051  *    Status
2052  *
2053  * Status
2054  *    implemented
2055  */
2056
2057 NTSTATUS NTAPI
2058 NtUnloadDriver(IN PUNICODE_STRING DriverServiceName)
2059 {
2060    return IopUnloadDriver(DriverServiceName, FALSE);
2061 }
2062
2063 /* EOF */