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reactos/ntoskrnl/io/iomgr/driver.c

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/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/io/iomgr/driver.c
* PURPOSE: Driver Object Management
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
* Filip Navara (navaraf@reactos.org)
* Hervé Poussineau (hpoussin@reactos.org)
*/
/* INCLUDES *******************************************************************/
#include <ntoskrnl.h>
#define NDEBUG
#include <debug.h>
/* GLOBALS ********************************************************************/
ERESOURCE IopDriverLoadResource;
LIST_ENTRY DriverReinitListHead;
KSPIN_LOCK DriverReinitListLock;
PLIST_ENTRY DriverReinitTailEntry;
PLIST_ENTRY DriverBootReinitTailEntry;
LIST_ENTRY DriverBootReinitListHead;
KSPIN_LOCK DriverBootReinitListLock;
UNICODE_STRING IopHardwareDatabaseKey =
RTL_CONSTANT_STRING(L"\\REGISTRY\\MACHINE\\HARDWARE\\DESCRIPTION\\SYSTEM");
POBJECT_TYPE IoDriverObjectType = NULL;
#define TAG_RTLREGISTRY 'vrqR'
extern BOOLEAN ExpInTextModeSetup;
extern BOOLEAN PnpSystemInit;
extern BOOLEAN PnPBootDriversLoaded;
extern KEVENT PiEnumerationFinished;
USHORT IopGroupIndex;
PLIST_ENTRY IopGroupTable;
/* PRIVATE FUNCTIONS **********************************************************/
NTSTATUS
NTAPI
IopInvalidDeviceRequest(
PDEVICE_OBJECT DeviceObject,
PIRP Irp)
{
Irp->IoStatus.Status = STATUS_INVALID_DEVICE_REQUEST;
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return STATUS_INVALID_DEVICE_REQUEST;
}
VOID
NTAPI
IopDeleteDriver(IN PVOID ObjectBody)
{
PDRIVER_OBJECT DriverObject = ObjectBody;
PIO_CLIENT_EXTENSION DriverExtension, NextDriverExtension;
PAGED_CODE();
DPRINT1("Deleting driver object '%wZ'\n", &DriverObject->DriverName);
/* There must be no device objects remaining at this point */
ASSERT(!DriverObject->DeviceObject);
/* Get the extension and loop them */
DriverExtension = IoGetDrvObjExtension(DriverObject)->ClientDriverExtension;
while (DriverExtension)
{
/* Get the next one */
NextDriverExtension = DriverExtension->NextExtension;
ExFreePoolWithTag(DriverExtension, TAG_DRIVER_EXTENSION);
/* Move on */
DriverExtension = NextDriverExtension;
}
/* Check if the driver image is still loaded */
if (DriverObject->DriverSection)
{
/* Unload it */
MmUnloadSystemImage(DriverObject->DriverSection);
}
/* Check if it has a name */
if (DriverObject->DriverName.Buffer)
{
/* Free it */
ExFreePool(DriverObject->DriverName.Buffer);
}
/* Check if it has a service key name */
if (DriverObject->DriverExtension->ServiceKeyName.Buffer)
{
/* Free it */
ExFreePool(DriverObject->DriverExtension->ServiceKeyName.Buffer);
}
}
NTSTATUS
FASTCALL
IopGetDriverObject(
PDRIVER_OBJECT *DriverObject,
PUNICODE_STRING ServiceName,
BOOLEAN FileSystem)
{
PDRIVER_OBJECT Object;
UNICODE_STRING Prefix;
UNICODE_STRING DriverName;
NTSTATUS Status;
DPRINT("IopGetDriverObject(%p '%wZ' %x)\n",
DriverObject, ServiceName, FileSystem);
ASSERT(ExIsResourceAcquiredExclusiveLite(&IopDriverLoadResource));
*DriverObject = NULL;
/* Create ModuleName string */
if (ServiceName == NULL || ServiceName->Buffer == NULL)
/* We don't know which DriverObject we have to open */
return STATUS_INVALID_PARAMETER_2;
if (FileSystem != FALSE)
RtlInitUnicodeString(&Prefix, FILESYSTEM_ROOT_NAME);
else
RtlInitUnicodeString(&Prefix, DRIVER_ROOT_NAME);
DriverName.Length = 0;
DriverName.MaximumLength = Prefix.Length + ServiceName->Length + sizeof(UNICODE_NULL);
ASSERT(DriverName.MaximumLength > ServiceName->Length);
DriverName.Buffer = ExAllocatePoolWithTag(PagedPool, DriverName.MaximumLength, TAG_IO);
if (DriverName.Buffer == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlAppendUnicodeStringToString(&DriverName, &Prefix);
RtlAppendUnicodeStringToString(&DriverName, ServiceName);
DPRINT("Driver name: '%wZ'\n", &DriverName);
/* Open driver object */
Status = ObReferenceObjectByName(&DriverName,
OBJ_OPENIF | OBJ_KERNEL_HANDLE | OBJ_CASE_INSENSITIVE, /* Attributes */
NULL, /* PassedAccessState */
0, /* DesiredAccess */
IoDriverObjectType,
KernelMode,
NULL, /* ParseContext */
(PVOID*)&Object);
ExFreePoolWithTag(DriverName.Buffer, TAG_IO);
if (!NT_SUCCESS(Status))
{
DPRINT("Failed to reference driver object, status=0x%08x\n", Status);
return Status;
}
*DriverObject = Object;
DPRINT("Driver Object: %p\n", Object);
return STATUS_SUCCESS;
}
/*
* RETURNS
* TRUE if String2 contains String1 as a suffix.
*/
BOOLEAN
NTAPI
IopSuffixUnicodeString(
IN PCUNICODE_STRING String1,
IN PCUNICODE_STRING String2)
{
PWCHAR pc1;
PWCHAR pc2;
ULONG Length;
if (String2->Length < String1->Length)
return FALSE;
Length = String1->Length / 2;
pc1 = String1->Buffer;
pc2 = &String2->Buffer[String2->Length / sizeof(WCHAR) - Length];
if (pc1 && pc2)
{
while (Length--)
{
if( *pc1++ != *pc2++ )
return FALSE;
}
return TRUE;
}
return FALSE;
}
/*
* IopDisplayLoadingMessage
*
* Display 'Loading XXX...' message.
*/
VOID
FASTCALL
IopDisplayLoadingMessage(PUNICODE_STRING ServiceName)
{
CHAR TextBuffer[256];
UNICODE_STRING DotSys = RTL_CONSTANT_STRING(L".SYS");
if (ExpInTextModeSetup) return;
if (!KeLoaderBlock) return;
RtlUpcaseUnicodeString(ServiceName, ServiceName, FALSE);
snprintf(TextBuffer, sizeof(TextBuffer),
"%s%sSystem32\\Drivers\\%wZ%s\r\n",
KeLoaderBlock->ArcBootDeviceName,
KeLoaderBlock->NtBootPathName,
ServiceName,
IopSuffixUnicodeString(&DotSys, ServiceName) ? "" : ".SYS");
HalDisplayString(TextBuffer);
}
/*
* IopNormalizeImagePath
*
* Normalize an image path to contain complete path.
*
* Parameters
* ImagePath
* The input path and on exit the result path. ImagePath.Buffer
* must be allocated by ExAllocatePool on input. Caller is responsible
* for freeing the buffer when it's no longer needed.
*
* ServiceName
* Name of the service that ImagePath belongs to.
*
* Return Value
* Status
*
* Remarks
* The input image path isn't freed on error.
*/
NTSTATUS
FASTCALL
IopNormalizeImagePath(
_Inout_ _When_(return>=0, _At_(ImagePath->Buffer, _Post_notnull_ __drv_allocatesMem(Mem)))
PUNICODE_STRING ImagePath,
_In_ PUNICODE_STRING ServiceName)
{
UNICODE_STRING SystemRootString = RTL_CONSTANT_STRING(L"\\SystemRoot\\");
UNICODE_STRING DriversPathString = RTL_CONSTANT_STRING(L"\\SystemRoot\\System32\\drivers\\");
UNICODE_STRING DotSysString = RTL_CONSTANT_STRING(L".sys");
UNICODE_STRING InputImagePath;
DPRINT("Normalizing image path '%wZ' for service '%wZ'\n", ImagePath, ServiceName);
InputImagePath = *ImagePath;
if (InputImagePath.Length == 0)
{
ImagePath->Length = 0;
ImagePath->MaximumLength = DriversPathString.Length +
ServiceName->Length +
DotSysString.Length +
sizeof(UNICODE_NULL);
ImagePath->Buffer = ExAllocatePoolWithTag(NonPagedPool,
ImagePath->MaximumLength,
TAG_IO);
if (ImagePath->Buffer == NULL)
return STATUS_NO_MEMORY;
RtlCopyUnicodeString(ImagePath, &DriversPathString);
RtlAppendUnicodeStringToString(ImagePath, ServiceName);
RtlAppendUnicodeStringToString(ImagePath, &DotSysString);
}
else if (InputImagePath.Buffer[0] != L'\\')
{
ImagePath->Length = 0;
ImagePath->MaximumLength = SystemRootString.Length +
InputImagePath.Length +
sizeof(UNICODE_NULL);
ImagePath->Buffer = ExAllocatePoolWithTag(NonPagedPool,
ImagePath->MaximumLength,
TAG_IO);
if (ImagePath->Buffer == NULL)
return STATUS_NO_MEMORY;
RtlCopyUnicodeString(ImagePath, &SystemRootString);
RtlAppendUnicodeStringToString(ImagePath, &InputImagePath);
/* Free caller's string */
ExFreePoolWithTag(InputImagePath.Buffer, TAG_RTLREGISTRY);
}
DPRINT("Normalized image path is '%wZ' for service '%wZ'\n", ImagePath, ServiceName);
return STATUS_SUCCESS;
}
/*
* IopLoadServiceModule
*
* Load a module specified by registry settings for service.
*
* Parameters
* ServiceName
* Name of the service to load.
*
* Return Value
* Status
*/
NTSTATUS
FASTCALL
IopLoadServiceModule(
IN PUNICODE_STRING ServiceName,
OUT PLDR_DATA_TABLE_ENTRY *ModuleObject)
{
RTL_QUERY_REGISTRY_TABLE QueryTable[3];
ULONG ServiceStart;
UNICODE_STRING ServiceImagePath, CCSName;
NTSTATUS Status;
HANDLE CCSKey, ServiceKey;
PVOID BaseAddress;
ASSERT(ExIsResourceAcquiredExclusiveLite(&IopDriverLoadResource));
ASSERT(ServiceName->Length);
DPRINT("IopLoadServiceModule(%wZ, 0x%p)\n", ServiceName, ModuleObject);
if (ExpInTextModeSetup)
{
/* We have no registry, but luckily we know where all the drivers are */
DPRINT1("IopLoadServiceModule(%wZ, 0x%p) called in ExpInTextModeSetup mode...\n", ServiceName, ModuleObject);
/* ServiceStart < 4 is all that matters */
ServiceStart = 0;
/* IopNormalizeImagePath will do all of the work for us if we give it an empty string */
RtlInitEmptyUnicodeString(&ServiceImagePath, NULL, 0);
}
else
{
/* Open CurrentControlSet */
RtlInitUnicodeString(&CCSName,
L"\\Registry\\Machine\\SYSTEM\\CurrentControlSet\\Services");
Status = IopOpenRegistryKeyEx(&CCSKey, NULL, &CCSName, KEY_READ);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopOpenRegistryKeyEx() failed for '%wZ' with status 0x%lx\n",
&CCSName, Status);
return Status;
}
/* Open service key */
Status = IopOpenRegistryKeyEx(&ServiceKey, CCSKey, ServiceName, KEY_READ);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopOpenRegistryKeyEx() failed for '%wZ' with status 0x%lx\n",
ServiceName, Status);
ZwClose(CCSKey);
return Status;
}
/*
* Get information about the service.
*/
RtlZeroMemory(QueryTable, sizeof(QueryTable));
RtlInitUnicodeString(&ServiceImagePath, NULL);
QueryTable[0].Name = L"Start";
QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
QueryTable[0].EntryContext = &ServiceStart;
QueryTable[1].Name = L"ImagePath";
QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT;
QueryTable[1].EntryContext = &ServiceImagePath;
Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
(PWSTR)ServiceKey,
QueryTable,
NULL,
NULL);
ZwClose(ServiceKey);
ZwClose(CCSKey);
if (!NT_SUCCESS(Status))
{
DPRINT1("RtlQueryRegistryValues() failed (Status %x)\n", Status);
return Status;
}
}
/*
* Normalize the image path for all later processing.
*/
Status = IopNormalizeImagePath(&ServiceImagePath, ServiceName);
if (!NT_SUCCESS(Status))
{
DPRINT("IopNormalizeImagePath() failed (Status %x)\n", Status);
return Status;
}
/*
* Case for disabled drivers
*/
if (ServiceStart >= 4)
{
/* We can't load this */
Status = STATUS_DRIVER_UNABLE_TO_LOAD;
}
else
{
DPRINT("Loading module from %wZ\n", &ServiceImagePath);
Status = MmLoadSystemImage(&ServiceImagePath, NULL, NULL, 0, (PVOID)ModuleObject, &BaseAddress);
if (NT_SUCCESS(Status))
{
IopDisplayLoadingMessage(ServiceName);
}
}
ExFreePool(ServiceImagePath.Buffer);
/*
* Now check if the module was loaded successfully.
*/
if (!NT_SUCCESS(Status))
{
DPRINT("Module loading failed (Status %x)\n", Status);
}
DPRINT("Module loading (Status %x)\n", Status);
return Status;
}
VOID
NTAPI
MmFreeDriverInitialization(IN PLDR_DATA_TABLE_ENTRY LdrEntry);
/*
* IopInitializeDriverModule
*
* Initialize a loaded driver.
*
* Parameters
* DeviceNode
* Pointer to device node.
*
* ModuleObject
* Module object representing the driver. It can be retrieve by
* IopLoadServiceModule.
*
* ServiceName
* Name of the service (as in registry).
*
* FileSystemDriver
* Set to TRUE for file system drivers.
*
* DriverObject
* On successful return this contains the driver object representing
* the loaded driver.
*/
NTSTATUS
FASTCALL
IopInitializeDriverModule(
IN PDEVICE_NODE DeviceNode,
IN PLDR_DATA_TABLE_ENTRY ModuleObject,
IN PUNICODE_STRING ServiceName,
IN BOOLEAN FileSystemDriver,
OUT PDRIVER_OBJECT *DriverObject)
{
static const WCHAR ServicesKeyName[] = L"\\Registry\\Machine\\System\\CurrentControlSet\\Services\\";
UNICODE_STRING DriverName;
UNICODE_STRING RegistryKey;
PDRIVER_INITIALIZE DriverEntry;
PDRIVER_OBJECT Driver;
NTSTATUS Status;
DriverEntry = ModuleObject->EntryPoint;
if (ServiceName != NULL && ServiceName->Length != 0)
{
RegistryKey.Length = 0;
RegistryKey.MaximumLength = sizeof(ServicesKeyName) + ServiceName->Length;
RegistryKey.Buffer = ExAllocatePoolWithTag(PagedPool,
RegistryKey.MaximumLength,
TAG_IO);
if (RegistryKey.Buffer == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlAppendUnicodeToString(&RegistryKey, ServicesKeyName);
RtlAppendUnicodeStringToString(&RegistryKey, ServiceName);
}
else
{
RtlInitEmptyUnicodeString(&RegistryKey, NULL, 0);
}
/* Create ModuleName string */
if (ServiceName && ServiceName->Length > 0)
{
DriverName.Length = 0;
DriverName.MaximumLength = sizeof(FILESYSTEM_ROOT_NAME) + ServiceName->Length;
DriverName.Buffer = ExAllocatePoolWithTag(PagedPool,
DriverName.MaximumLength,
TAG_IO);
if (DriverName.Buffer == NULL)
{
RtlFreeUnicodeString(&RegistryKey);
return STATUS_INSUFFICIENT_RESOURCES;
}
if (FileSystemDriver != FALSE)
RtlAppendUnicodeToString(&DriverName, FILESYSTEM_ROOT_NAME);
else
RtlAppendUnicodeToString(&DriverName, DRIVER_ROOT_NAME);
RtlAppendUnicodeStringToString(&DriverName, ServiceName);
DPRINT("Driver name: '%wZ'\n", &DriverName);
}
else
{
RtlInitEmptyUnicodeString(&DriverName, NULL, 0);
}
Status = IopCreateDriver(DriverName.Length > 0 ? &DriverName : NULL,
DriverEntry,
&RegistryKey,
ServiceName,
ModuleObject,
&Driver);
RtlFreeUnicodeString(&RegistryKey);
RtlFreeUnicodeString(&DriverName);
if (!NT_SUCCESS(Status))
{
DPRINT("IopCreateDriver() failed (Status 0x%08lx)\n", Status);
return Status;
}
*DriverObject = Driver;
MmFreeDriverInitialization((PLDR_DATA_TABLE_ENTRY)Driver->DriverSection);
/* Set the driver as initialized */
IopReadyDeviceObjects(Driver);
if (PnpSystemInit) IopReinitializeDrivers();
return STATUS_SUCCESS;
}
/*
* IopAttachFilterDriversCallback
*
* Internal routine used by IopAttachFilterDrivers.
*/
NTSTATUS
NTAPI
IopAttachFilterDriversCallback(
PWSTR ValueName,
ULONG ValueType,
PVOID ValueData,
ULONG ValueLength,
PVOID Context,
PVOID EntryContext)
{
PDEVICE_NODE DeviceNode = Context;
UNICODE_STRING ServiceName;
PWCHAR Filters;
PLDR_DATA_TABLE_ENTRY ModuleObject;
PDRIVER_OBJECT DriverObject;
NTSTATUS Status;
/* No filter value present */
if (ValueType == REG_NONE)
return STATUS_SUCCESS;
for (Filters = ValueData;
((ULONG_PTR)Filters - (ULONG_PTR)ValueData) < ValueLength &&
*Filters != 0;
Filters += (ServiceName.Length / sizeof(WCHAR)) + 1)
{
DPRINT("Filter Driver: %S (%wZ)\n", Filters, &DeviceNode->InstancePath);
ServiceName.Buffer = Filters;
ServiceName.MaximumLength =
ServiceName.Length = (USHORT)wcslen(Filters) * sizeof(WCHAR);
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite(&IopDriverLoadResource, TRUE);
Status = IopGetDriverObject(&DriverObject,
&ServiceName,
FALSE);
if (!NT_SUCCESS(Status))
{
/* Load and initialize the filter driver */
Status = IopLoadServiceModule(&ServiceName, &ModuleObject);
if (!NT_SUCCESS(Status))
{
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
return Status;
}
Status = IopInitializeDriverModule(DeviceNode,
ModuleObject,
&ServiceName,
FALSE,
&DriverObject);
if (!NT_SUCCESS(Status))
{
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
return Status;
}
}
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
Status = IopInitializeDevice(DeviceNode, DriverObject);
/* Remove extra reference */
ObDereferenceObject(DriverObject);
if (!NT_SUCCESS(Status))
return Status;
}
return STATUS_SUCCESS;
}
/*
* IopAttachFilterDrivers
*
* Load filter drivers for specified device node.
*
* Parameters
* Lower
* Set to TRUE for loading lower level filters or FALSE for upper
* level filters.
*/
NTSTATUS
FASTCALL
IopAttachFilterDrivers(
PDEVICE_NODE DeviceNode,
HANDLE EnumSubKey,
HANDLE ClassKey,
BOOLEAN Lower)
{
RTL_QUERY_REGISTRY_TABLE QueryTable[2] = { { NULL, 0, NULL, NULL, 0, NULL, 0 }, };
NTSTATUS Status;
/*
* First load the device filters
*/
QueryTable[0].QueryRoutine = IopAttachFilterDriversCallback;
if (Lower)
QueryTable[0].Name = L"LowerFilters";
else
QueryTable[0].Name = L"UpperFilters";
QueryTable[0].Flags = 0;
QueryTable[0].DefaultType = REG_NONE;
Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
(PWSTR)EnumSubKey,
QueryTable,
DeviceNode,
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to load device %s filters: %08X\n",
Lower ? "lower" : "upper", Status);
return Status;
}
QueryTable[0].QueryRoutine = IopAttachFilterDriversCallback;
if (Lower)
QueryTable[0].Name = L"LowerFilters";
else
QueryTable[0].Name = L"UpperFilters";
QueryTable[0].EntryContext = NULL;
QueryTable[0].Flags = 0;
QueryTable[0].DefaultType = REG_NONE;
if (ClassKey == NULL)
{
return STATUS_SUCCESS;
}
Status = RtlQueryRegistryValues(RTL_REGISTRY_HANDLE,
(PWSTR)ClassKey,
QueryTable,
DeviceNode,
NULL);
if (!NT_SUCCESS(Status))
{
DPRINT1("Failed to load class %s filters: %08X\n",
Lower ? "lower" : "upper", Status);
return Status;
}
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
MiResolveImageReferences(IN PVOID ImageBase,
IN PUNICODE_STRING ImageFileDirectory,
IN PUNICODE_STRING NamePrefix OPTIONAL,
OUT PCHAR *MissingApi,
OUT PWCHAR *MissingDriver,
OUT PLOAD_IMPORTS *LoadImports);
//
// Used for images already loaded (boot drivers)
//
CODE_SEG("INIT")
NTSTATUS
NTAPI
LdrProcessDriverModule(PLDR_DATA_TABLE_ENTRY LdrEntry,
PUNICODE_STRING FileName,
PLDR_DATA_TABLE_ENTRY *ModuleObject)
{
NTSTATUS Status;
UNICODE_STRING BaseName, BaseDirectory;
PLOAD_IMPORTS LoadedImports = (PVOID)-2;
PCHAR MissingApiName, Buffer;
PWCHAR MissingDriverName;
PVOID DriverBase = LdrEntry->DllBase;
/* Allocate a buffer we'll use for names */
Buffer = ExAllocatePoolWithTag(NonPagedPool,
MAXIMUM_FILENAME_LENGTH,
TAG_LDR_WSTR);
if (!Buffer)
{
/* Fail */
return STATUS_INSUFFICIENT_RESOURCES;
}
/* Check for a separator */
if (FileName->Buffer[0] == OBJ_NAME_PATH_SEPARATOR)
{
PWCHAR p;
ULONG BaseLength;
/* Loop the path until we get to the base name */
p = &FileName->Buffer[FileName->Length / sizeof(WCHAR)];
while (*(p - 1) != OBJ_NAME_PATH_SEPARATOR) p--;
/* Get the length */
BaseLength = (ULONG)(&FileName->Buffer[FileName->Length / sizeof(WCHAR)] - p);
BaseLength *= sizeof(WCHAR);
/* Setup the string */
BaseName.Length = (USHORT)BaseLength;
BaseName.Buffer = p;
}
else
{
/* Otherwise, we already have a base name */
BaseName.Length = FileName->Length;
BaseName.Buffer = FileName->Buffer;
}
/* Setup the maximum length */
BaseName.MaximumLength = BaseName.Length;
/* Now compute the base directory */
BaseDirectory = *FileName;
BaseDirectory.Length -= BaseName.Length;
BaseDirectory.MaximumLength = BaseDirectory.Length;
/* Resolve imports */
MissingApiName = Buffer;
Status = MiResolveImageReferences(DriverBase,
&BaseDirectory,
NULL,
&MissingApiName,
&MissingDriverName,
&LoadedImports);
/* Free the temporary buffer */
ExFreePoolWithTag(Buffer, TAG_LDR_WSTR);
/* Check the result of the imports resolution */
if (!NT_SUCCESS(Status)) return Status;
/* Return */
*ModuleObject = LdrEntry;
return STATUS_SUCCESS;
}
/*
* IopInitializeBuiltinDriver
*
* Initialize a driver that is already loaded in memory.
*/
CODE_SEG("INIT")
NTSTATUS
NTAPI
IopInitializeBuiltinDriver(IN PLDR_DATA_TABLE_ENTRY BootLdrEntry)
{
PDEVICE_NODE DeviceNode;
PDRIVER_OBJECT DriverObject;
NTSTATUS Status;
PWCHAR Buffer, FileNameWithoutPath;
PWSTR FileExtension;
PUNICODE_STRING ModuleName = &BootLdrEntry->BaseDllName;
PLDR_DATA_TABLE_ENTRY LdrEntry;
PLIST_ENTRY NextEntry;
UNICODE_STRING ServiceName;
BOOLEAN Success;
/*
* Display 'Loading XXX...' message
*/
IopDisplayLoadingMessage(ModuleName);
InbvIndicateProgress();
Buffer = ExAllocatePoolWithTag(PagedPool,
ModuleName->Length + sizeof(UNICODE_NULL),
TAG_IO);
if (Buffer == NULL)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyMemory(Buffer, ModuleName->Buffer, ModuleName->Length);
Buffer[ModuleName->Length / sizeof(WCHAR)] = UNICODE_NULL;
/*
* Generate filename without path (not needed by freeldr)
*/
FileNameWithoutPath = wcsrchr(Buffer, L'\\');
if (FileNameWithoutPath == NULL)
{
FileNameWithoutPath = Buffer;
}
else
{
FileNameWithoutPath++;
}
/*
* Strip the file extension from ServiceName
*/
Success = RtlCreateUnicodeString(&ServiceName, FileNameWithoutPath);
ExFreePoolWithTag(Buffer, TAG_IO);
if (!Success)
{
return STATUS_INSUFFICIENT_RESOURCES;
}
FileExtension = wcsrchr(ServiceName.Buffer, L'.');
if (FileExtension != NULL)
{
ServiceName.Length -= (USHORT)wcslen(FileExtension) * sizeof(WCHAR);
FileExtension[0] = UNICODE_NULL;
}
/*
* Determine the right device object
*/
/* Use IopRootDeviceNode for now */
Status = IopCreateDeviceNode(IopRootDeviceNode,
NULL,
&ServiceName,
&DeviceNode);
RtlFreeUnicodeString(&ServiceName);
if (!NT_SUCCESS(Status))
{
DPRINT1("Driver '%wZ' load failed, status (%x)\n", ModuleName, Status);
return Status;
}
/* Lookup the new Ldr entry in PsLoadedModuleList */
NextEntry = PsLoadedModuleList.Flink;
while (NextEntry != &PsLoadedModuleList)
{
LdrEntry = CONTAINING_RECORD(NextEntry,
LDR_DATA_TABLE_ENTRY,
InLoadOrderLinks);
if (RtlEqualUnicodeString(ModuleName, &LdrEntry->BaseDllName, TRUE))
{
break;
}
NextEntry = NextEntry->Flink;
}
ASSERT(NextEntry != &PsLoadedModuleList);
/*
* Initialize the driver
*/
Status = IopInitializeDriverModule(DeviceNode,
LdrEntry,
&DeviceNode->ServiceName,
FALSE,
&DriverObject);
if (!NT_SUCCESS(Status))
{
return Status;
}
Status = IopInitializeDevice(DeviceNode, DriverObject);
if (NT_SUCCESS(Status))
{
Status = IopStartDevice(DeviceNode);
}
/* Remove extra reference from IopInitializeDriverModule */
ObDereferenceObject(DriverObject);
return Status;
}
/*
* IopInitializeBootDrivers
*
* Initialize boot drivers and free memory for boot files.
*
* Parameters
* None
*
* Return Value
* None
*/
CODE_SEG("INIT")
VOID
FASTCALL
IopInitializeBootDrivers(VOID)
{
PLIST_ENTRY ListHead, NextEntry, NextEntry2;
PLDR_DATA_TABLE_ENTRY LdrEntry;
PDEVICE_NODE DeviceNode;
PDRIVER_OBJECT DriverObject;
LDR_DATA_TABLE_ENTRY ModuleObject;
NTSTATUS Status;
UNICODE_STRING DriverName;
ULONG i, Index;
PDRIVER_INFORMATION DriverInfo, DriverInfoTag;
HANDLE KeyHandle;
PBOOT_DRIVER_LIST_ENTRY BootEntry;
DPRINT("IopInitializeBootDrivers()\n");
/* Use IopRootDeviceNode for now */
Status = IopCreateDeviceNode(IopRootDeviceNode, NULL, NULL, &DeviceNode);
if (!NT_SUCCESS(Status)) return;
/* Setup the module object for the RAW FS Driver */
ModuleObject.DllBase = NULL;
ModuleObject.SizeOfImage = 0;
ModuleObject.EntryPoint = RawFsDriverEntry;
RtlInitUnicodeString(&DriverName, L"RAW");
/* Initialize it */
Status = IopInitializeDriverModule(DeviceNode,
&ModuleObject,
&DriverName,
TRUE,
&DriverObject);
if (!NT_SUCCESS(Status))
{
/* Fail */
return;
}
/* Now initialize the associated device */
Status = IopInitializeDevice(DeviceNode, DriverObject);
if (!NT_SUCCESS(Status))
{
/* Fail */
ObDereferenceObject(DriverObject);
return;
}
/* Start it up */
Status = IopStartDevice(DeviceNode);
if (!NT_SUCCESS(Status))
{
/* Fail */
ObDereferenceObject(DriverObject);
return;
}
/* Get highest group order index */
IopGroupIndex = PpInitGetGroupOrderIndex(NULL);
if (IopGroupIndex == 0xFFFF) ASSERT(FALSE);
/* Allocate the group table */
IopGroupTable = ExAllocatePoolWithTag(PagedPool,
IopGroupIndex * sizeof(LIST_ENTRY),
TAG_IO);
if (IopGroupTable == NULL) ASSERT(FALSE);
/* Initialize the group table lists */
for (i = 0; i < IopGroupIndex; i++) InitializeListHead(&IopGroupTable[i]);
/* Loop the boot modules */
ListHead = &KeLoaderBlock->LoadOrderListHead;
NextEntry = ListHead->Flink;
while (ListHead != NextEntry)
{
/* Get the entry */
LdrEntry = CONTAINING_RECORD(NextEntry,
LDR_DATA_TABLE_ENTRY,
InLoadOrderLinks);
/* Check if the DLL needs to be initialized */
if (LdrEntry->Flags & LDRP_DRIVER_DEPENDENT_DLL)
{
/* Call its entrypoint */
MmCallDllInitialize(LdrEntry, NULL);
}
/* Go to the next driver */
NextEntry = NextEntry->Flink;
}
/* Loop the boot drivers */
ListHead = &KeLoaderBlock->BootDriverListHead;
NextEntry = ListHead->Flink;
while (ListHead != NextEntry)
{
/* Get the entry */
BootEntry = CONTAINING_RECORD(NextEntry,
BOOT_DRIVER_LIST_ENTRY,
Link);
/* Get the driver loader entry */
LdrEntry = BootEntry->LdrEntry;
/* Allocate our internal accounting structure */
DriverInfo = ExAllocatePoolWithTag(PagedPool,
sizeof(DRIVER_INFORMATION),
TAG_IO);
if (DriverInfo)
{
/* Zero it and initialize it */
RtlZeroMemory(DriverInfo, sizeof(DRIVER_INFORMATION));
InitializeListHead(&DriverInfo->Link);
DriverInfo->DataTableEntry = BootEntry;
/* Open the registry key */
Status = IopOpenRegistryKeyEx(&KeyHandle,
NULL,
&BootEntry->RegistryPath,
KEY_READ);
DPRINT("IopOpenRegistryKeyEx(%wZ) returned 0x%08lx\n", &BootEntry->RegistryPath, Status);
#if 0
if (NT_SUCCESS(Status))
#else // Hack still needed...
if ((NT_SUCCESS(Status)) || /* ReactOS HACK for SETUPLDR */
((KeLoaderBlock->SetupLdrBlock) && ((KeyHandle = (PVOID)1)))) // yes, it's an assignment!
#endif
{
/* Save the handle */
DriverInfo->ServiceHandle = KeyHandle;
/* Get the group oder index */
Index = PpInitGetGroupOrderIndex(KeyHandle);
/* Get the tag position */
DriverInfo->TagPosition = PipGetDriverTagPriority(KeyHandle);
/* Insert it into the list, at the right place */
ASSERT(Index < IopGroupIndex);
NextEntry2 = IopGroupTable[Index].Flink;
while (NextEntry2 != &IopGroupTable[Index])
{
/* Get the driver info */
DriverInfoTag = CONTAINING_RECORD(NextEntry2,
DRIVER_INFORMATION,
Link);
/* Check if we found the right tag position */
if (DriverInfoTag->TagPosition > DriverInfo->TagPosition)
{
/* We're done */
break;
}
/* Next entry */
NextEntry2 = NextEntry2->Flink;
}
/* Insert us right before the next entry */
NextEntry2 = NextEntry2->Blink;
InsertHeadList(NextEntry2, &DriverInfo->Link);
}
}
/* Go to the next driver */
NextEntry = NextEntry->Flink;
}
/* Loop each group index */
for (i = 0; i < IopGroupIndex; i++)
{
/* Loop each group table */
NextEntry = IopGroupTable[i].Flink;
while (NextEntry != &IopGroupTable[i])
{
/* Get the entry */
DriverInfo = CONTAINING_RECORD(NextEntry,
DRIVER_INFORMATION,
Link);
/* Get the driver loader entry */
LdrEntry = DriverInfo->DataTableEntry->LdrEntry;
/* Initialize it */
IopInitializeBuiltinDriver(LdrEntry);
/* Start the devices found by a driver (if any) */
PiQueueDeviceAction(IopRootDeviceNode->PhysicalDeviceObject,
PiActionEnumRootDevices,
NULL,
NULL);
/* Next entry */
NextEntry = NextEntry->Flink;
}
}
/* HAL Root Bus is being initialized before loading the boot drivers so this may cause issues
* when some devices are not being initialized with their drivers. This flag is used to delay
* all actions with devices (except PnP root device) until boot drivers are loaded.
* See PiQueueDeviceAction function
*/
PnPBootDriversLoaded = TRUE;
}
CODE_SEG("INIT")
VOID
FASTCALL
IopInitializeSystemDrivers(VOID)
{
PUNICODE_STRING *DriverList, *SavedList;
/* No system drivers on the boot cd */
if (KeLoaderBlock->SetupLdrBlock) return; // ExpInTextModeSetup
/* Get the driver list */
SavedList = DriverList = CmGetSystemDriverList();
ASSERT(DriverList);
/* Loop it */
while (*DriverList)
{
/* Load the driver */
ZwLoadDriver(*DriverList);
/* Free the entry */
RtlFreeUnicodeString(*DriverList);
ExFreePool(*DriverList);
/* Next entry */
InbvIndicateProgress();
DriverList++;
}
/* Free the list */
ExFreePool(SavedList);
}
/*
* IopUnloadDriver
*
* Unloads a device driver.
*
* Parameters
* DriverServiceName
* Name of the service to unload (registry key).
*
* UnloadPnpDrivers
* Whether to unload Plug & Plug or only legacy drivers. If this
* parameter is set to FALSE, the routine will unload only legacy
* drivers.
*
* Return Value
* Status
*
* To do
* Guard the whole function by SEH.
*/
NTSTATUS NTAPI
IopUnloadDriver(PUNICODE_STRING DriverServiceName, BOOLEAN UnloadPnpDrivers)
{
UNICODE_STRING Backslash = RTL_CONSTANT_STRING(L"\\");
RTL_QUERY_REGISTRY_TABLE QueryTable[2];
UNICODE_STRING ImagePath;
UNICODE_STRING ServiceName;
UNICODE_STRING ObjectName;
PDRIVER_OBJECT DriverObject;
PDEVICE_OBJECT DeviceObject;
PEXTENDED_DEVOBJ_EXTENSION DeviceExtension;
NTSTATUS Status;
USHORT LastBackslash;
BOOLEAN SafeToUnload = TRUE;
KPROCESSOR_MODE PreviousMode;
UNICODE_STRING CapturedServiceName;
PAGED_CODE();
PreviousMode = ExGetPreviousMode();
/* Need the appropriate priviliege */
if (!SeSinglePrivilegeCheck(SeLoadDriverPrivilege, PreviousMode))
{
DPRINT1("No unload privilege!\n");
return STATUS_PRIVILEGE_NOT_HELD;
}
/* Capture the service name */
Status = ProbeAndCaptureUnicodeString(&CapturedServiceName, PreviousMode, DriverServiceName);
if (!NT_SUCCESS(Status))
{
return Status;
}
DPRINT("IopUnloadDriver('%wZ', %u)\n", &CapturedServiceName, UnloadPnpDrivers);
/* We need a service name */
if (CapturedServiceName.Length == 0)
{
ReleaseCapturedUnicodeString(&CapturedServiceName, PreviousMode);
return STATUS_INVALID_PARAMETER;
}
/*
* Get the service name from the registry key name
*/
Status = RtlFindCharInUnicodeString(RTL_FIND_CHAR_IN_UNICODE_STRING_START_AT_END,
&CapturedServiceName,
&Backslash,
&LastBackslash);
if (NT_SUCCESS(Status))
{
NT_ASSERT(CapturedServiceName.Length >= LastBackslash + sizeof(WCHAR));
ServiceName.Buffer = &CapturedServiceName.Buffer[LastBackslash / sizeof(WCHAR) + 1];
ServiceName.Length = CapturedServiceName.Length - LastBackslash - sizeof(WCHAR);
ServiceName.MaximumLength = CapturedServiceName.MaximumLength - LastBackslash - sizeof(WCHAR);
}
else
{
ServiceName = CapturedServiceName;
}
/*
* Construct the driver object name
*/
Status = RtlUShortAdd(sizeof(DRIVER_ROOT_NAME),
ServiceName.Length,
&ObjectName.MaximumLength);
if (!NT_SUCCESS(Status))
{
ReleaseCapturedUnicodeString(&CapturedServiceName, PreviousMode);
return Status;
}
ObjectName.Length = 0;
ObjectName.Buffer = ExAllocatePoolWithTag(PagedPool,
ObjectName.MaximumLength,
TAG_IO);
if (!ObjectName.Buffer)
{
ReleaseCapturedUnicodeString(&CapturedServiceName, PreviousMode);
return STATUS_INSUFFICIENT_RESOURCES;
}
NT_VERIFY(NT_SUCCESS(RtlAppendUnicodeToString(&ObjectName, DRIVER_ROOT_NAME)));
NT_VERIFY(NT_SUCCESS(RtlAppendUnicodeStringToString(&ObjectName, &ServiceName)));
/*
* Find the driver object
*/
Status = ObReferenceObjectByName(&ObjectName,
0,
0,
0,
IoDriverObjectType,
KernelMode,
0,
(PVOID*)&DriverObject);
if (!NT_SUCCESS(Status))
{
DPRINT1("Can't locate driver object for %wZ\n", &ObjectName);
ExFreePoolWithTag(ObjectName.Buffer, TAG_IO);
ReleaseCapturedUnicodeString(&CapturedServiceName, PreviousMode);
return Status;
}
/* Free the buffer for driver object name */
ExFreePoolWithTag(ObjectName.Buffer, TAG_IO);
/* Check that driver is not already unloading */
if (DriverObject->Flags & DRVO_UNLOAD_INVOKED)
{
DPRINT1("Driver deletion pending\n");
ObDereferenceObject(DriverObject);
ReleaseCapturedUnicodeString(&CapturedServiceName, PreviousMode);
return STATUS_DELETE_PENDING;
}
/*
* Get path of service...
*/
RtlZeroMemory(QueryTable, sizeof(QueryTable));
RtlInitUnicodeString(&ImagePath, NULL);
QueryTable[0].Name = L"ImagePath";
QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT;
QueryTable[0].EntryContext = &ImagePath;
Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
CapturedServiceName.Buffer,
QueryTable,
NULL,
NULL);
/* We no longer need service name */
ReleaseCapturedUnicodeString(&CapturedServiceName, PreviousMode);
if (!NT_SUCCESS(Status))
{
DPRINT1("RtlQueryRegistryValues() failed (Status %x)\n", Status);
ObDereferenceObject(DriverObject);
return Status;
}
/*
* Normalize the image path for all later processing.
*/
Status = IopNormalizeImagePath(&ImagePath, &ServiceName);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopNormalizeImagePath() failed (Status %x)\n", Status);
ObDereferenceObject(DriverObject);
return Status;
}
/* Free the service path */
ExFreePool(ImagePath.Buffer);
/*
* Unload the module and release the references to the device object
*/
/* Call the load/unload routine, depending on current process */
if (DriverObject->DriverUnload && DriverObject->DriverSection &&
(UnloadPnpDrivers || (DriverObject->Flags & DRVO_LEGACY_DRIVER)))
{
/* Loop through each device object of the driver
and set DOE_UNLOAD_PENDING flag */
DeviceObject = DriverObject->DeviceObject;
while (DeviceObject)
{
/* Set the unload pending flag for the device */
DeviceExtension = IoGetDevObjExtension(DeviceObject);
DeviceExtension->ExtensionFlags |= DOE_UNLOAD_PENDING;
/* Make sure there are no attached devices or no reference counts */
if ((DeviceObject->ReferenceCount) || (DeviceObject->AttachedDevice))
{
/* Not safe to unload */
DPRINT1("Drivers device object is referenced or has attached devices\n");
SafeToUnload = FALSE;
}
DeviceObject = DeviceObject->NextDevice;
}
/* If not safe to unload, then return success */
if (!SafeToUnload)
{
ObDereferenceObject(DriverObject);
return STATUS_SUCCESS;
}
DPRINT1("Unloading driver '%wZ' (manual)\n", &DriverObject->DriverName);
/* Set the unload invoked flag and call the unload routine */
DriverObject->Flags |= DRVO_UNLOAD_INVOKED;
Status = IopLoadUnloadDriver(NULL, &DriverObject);
ASSERT(Status == STATUS_SUCCESS);
/* Mark the driver object temporary, so it could be deleted later */
ObMakeTemporaryObject(DriverObject);
/* Dereference it 2 times */
ObDereferenceObject(DriverObject);
ObDereferenceObject(DriverObject);
return Status;
}
else
{
DPRINT1("No DriverUnload function! '%wZ' will not be unloaded!\n", &DriverObject->DriverName);
/* Dereference one time (refd inside this function) */
ObDereferenceObject(DriverObject);
/* Return unloading failure */
return STATUS_INVALID_DEVICE_REQUEST;
}
}
VOID
NTAPI
IopReinitializeDrivers(VOID)
{
PDRIVER_REINIT_ITEM ReinitItem;
PLIST_ENTRY Entry;
/* Get the first entry and start looping */
Entry = ExInterlockedRemoveHeadList(&DriverReinitListHead,
&DriverReinitListLock);
while (Entry)
{
/* Get the item */
ReinitItem = CONTAINING_RECORD(Entry, DRIVER_REINIT_ITEM, ItemEntry);
/* Increment reinitialization counter */
ReinitItem->DriverObject->DriverExtension->Count++;
/* Remove the device object flag */
ReinitItem->DriverObject->Flags &= ~DRVO_REINIT_REGISTERED;
/* Call the routine */
ReinitItem->ReinitRoutine(ReinitItem->DriverObject,
ReinitItem->Context,
ReinitItem->DriverObject->
DriverExtension->Count);
/* Free the entry */
ExFreePool(Entry);
/* Move to the next one */
Entry = ExInterlockedRemoveHeadList(&DriverReinitListHead,
&DriverReinitListLock);
}
}
VOID
NTAPI
IopReinitializeBootDrivers(VOID)
{
PDRIVER_REINIT_ITEM ReinitItem;
PLIST_ENTRY Entry;
/* Get the first entry and start looping */
Entry = ExInterlockedRemoveHeadList(&DriverBootReinitListHead,
&DriverBootReinitListLock);
while (Entry)
{
/* Get the item */
ReinitItem = CONTAINING_RECORD(Entry, DRIVER_REINIT_ITEM, ItemEntry);
/* Increment reinitialization counter */
ReinitItem->DriverObject->DriverExtension->Count++;
/* Remove the device object flag */
ReinitItem->DriverObject->Flags &= ~DRVO_BOOTREINIT_REGISTERED;
/* Call the routine */
ReinitItem->ReinitRoutine(ReinitItem->DriverObject,
ReinitItem->Context,
ReinitItem->DriverObject->
DriverExtension->Count);
/* Free the entry */
ExFreePool(Entry);
/* Move to the next one */
Entry = ExInterlockedRemoveHeadList(&DriverBootReinitListHead,
&DriverBootReinitListLock);
}
/* Wait for all device actions being finished*/
KeWaitForSingleObject(&PiEnumerationFinished, Executive, KernelMode, FALSE, NULL);
}
NTSTATUS
NTAPI
IopCreateDriver(IN PUNICODE_STRING DriverName OPTIONAL,
IN PDRIVER_INITIALIZE InitializationFunction,
IN PUNICODE_STRING RegistryPath OPTIONAL,
IN PCUNICODE_STRING ServiceName,
IN PLDR_DATA_TABLE_ENTRY ModuleObject OPTIONAL,
OUT PDRIVER_OBJECT *pDriverObject)
{
WCHAR NameBuffer[100];
USHORT NameLength;
UNICODE_STRING LocalDriverName;
NTSTATUS Status;
OBJECT_ATTRIBUTES ObjectAttributes;
ULONG ObjectSize;
PDRIVER_OBJECT DriverObject;
UNICODE_STRING ServiceKeyName;
HANDLE hDriver;
ULONG i, RetryCount = 0;
try_again:
/* First, create a unique name for the driver if we don't have one */
if (!DriverName)
{
/* Create a random name and set up the string */
NameLength = (USHORT)swprintf(NameBuffer,
DRIVER_ROOT_NAME L"%08u",
KeTickCount.LowPart);
LocalDriverName.Length = NameLength * sizeof(WCHAR);
LocalDriverName.MaximumLength = LocalDriverName.Length + sizeof(UNICODE_NULL);
LocalDriverName.Buffer = NameBuffer;
}
else
{
/* So we can avoid another code path, use a local var */
LocalDriverName = *DriverName;
}
/* Initialize the Attributes */
ObjectSize = sizeof(DRIVER_OBJECT) + sizeof(EXTENDED_DRIVER_EXTENSION);
InitializeObjectAttributes(&ObjectAttributes,
&LocalDriverName,
OBJ_PERMANENT | OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE,
NULL,
NULL);
/* Create the Object */
Status = ObCreateObject(KernelMode,
IoDriverObjectType,
&ObjectAttributes,
KernelMode,
NULL,
ObjectSize,
0,
0,
(PVOID*)&DriverObject);
if (!NT_SUCCESS(Status)) return Status;
DPRINT("IopCreateDriver(): created DO %p\n", DriverObject);
/* Set up the Object */
RtlZeroMemory(DriverObject, ObjectSize);
DriverObject->Type = IO_TYPE_DRIVER;
DriverObject->Size = sizeof(DRIVER_OBJECT);
/*
* Check whether RegistryPath and ModuleObject are both NULL because
* IoCreateDriver() was called to initialize a built-in driver.
*/
if ((RegistryPath != NULL) || (ModuleObject != NULL))
DriverObject->Flags = DRVO_LEGACY_DRIVER;
else
DriverObject->Flags = DRVO_BUILTIN_DRIVER;
DriverObject->DriverExtension = (PDRIVER_EXTENSION)(DriverObject + 1);
DriverObject->DriverExtension->DriverObject = DriverObject;
DriverObject->DriverInit = InitializationFunction;
DriverObject->DriverSection = ModuleObject;
/* Loop all Major Functions */
for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++)
{
/* Invalidate each function */
DriverObject->MajorFunction[i] = IopInvalidDeviceRequest;
}
/* Set up the service key name buffer */
ServiceKeyName.MaximumLength = ServiceName->Length + sizeof(UNICODE_NULL);
ServiceKeyName.Buffer = ExAllocatePoolWithTag(NonPagedPool,
ServiceKeyName.MaximumLength,
TAG_IO);
if (!ServiceKeyName.Buffer)
{
/* Fail */
ObMakeTemporaryObject(DriverObject);
ObDereferenceObject(DriverObject);
return STATUS_INSUFFICIENT_RESOURCES;
}
/* Copy the name and set it in the driver extension */
RtlCopyUnicodeString(&ServiceKeyName,
ServiceName);
DriverObject->DriverExtension->ServiceKeyName = ServiceKeyName;
/* Make a copy of the driver name to store in the driver object */
DriverObject->DriverName.MaximumLength = LocalDriverName.Length;
DriverObject->DriverName.Buffer = ExAllocatePoolWithTag(PagedPool,
DriverObject->DriverName.MaximumLength,
TAG_IO);
if (!DriverObject->DriverName.Buffer)
{
/* Fail */
ObMakeTemporaryObject(DriverObject);
ObDereferenceObject(DriverObject);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlCopyUnicodeString(&DriverObject->DriverName,
&LocalDriverName);
/* Add the Object and get its handle */
Status = ObInsertObject(DriverObject,
NULL,
FILE_READ_DATA,
0,
NULL,
&hDriver);
/* Eliminate small possibility when this function is called more than
once in a row, and KeTickCount doesn't get enough time to change */
if (!DriverName && (Status == STATUS_OBJECT_NAME_COLLISION) && (RetryCount < 100))
{
RetryCount++;
goto try_again;
}
if (!NT_SUCCESS(Status)) return Status;
/* Now reference it */
Status = ObReferenceObjectByHandle(hDriver,
0,
IoDriverObjectType,
KernelMode,
(PVOID*)&DriverObject,
NULL);
/* Close the extra handle */
ZwClose(hDriver);
if (!NT_SUCCESS(Status))
{
/* Fail */
ObMakeTemporaryObject(DriverObject);
ObDereferenceObject(DriverObject);
return Status;
}
DriverObject->HardwareDatabase = &IopHardwareDatabaseKey;
DriverObject->DriverStart = ModuleObject ? ModuleObject->DllBase : 0;
DriverObject->DriverSize = ModuleObject ? ModuleObject->SizeOfImage : 0;
/* Finally, call its init function */
DPRINT("RegistryKey: %wZ\n", RegistryPath);
DPRINT("Calling driver entrypoint at %p\n", InitializationFunction);
Status = (*InitializationFunction)(DriverObject, RegistryPath);
if (!NT_SUCCESS(Status))
{
/* If it didn't work, then kill the object */
DPRINT1("'%wZ' initialization failed, status (0x%08lx)\n", DriverName, Status);
DriverObject->DriverSection = NULL;
ObMakeTemporaryObject(DriverObject);
ObDereferenceObject(DriverObject);
return Status;
}
else
{
/* Returns to caller the object */
*pDriverObject = DriverObject;
}
/* We're going to say if we don't have any DOs from DriverEntry, then we're not legacy.
* Other parts of the I/O manager depend on this behavior */
if (!DriverObject->DeviceObject) DriverObject->Flags &= ~DRVO_LEGACY_DRIVER;
/* Loop all Major Functions */
for (i = 0; i <= IRP_MJ_MAXIMUM_FUNCTION; i++)
{
/*
* Make sure the driver didn't set any dispatch entry point to NULL!
* Doing so is illegal; drivers shouldn't touch entry points they
* do not implement.
*/
/* Check if it did so anyway */
if (!DriverObject->MajorFunction[i])
{
/* Print a warning in the debug log */
DPRINT1("Driver <%wZ> set DriverObject->MajorFunction[%lu] to NULL!\n",
&DriverObject->DriverName, i);
/* Fix it up */
DriverObject->MajorFunction[i] = IopInvalidDeviceRequest;
}
}
/* Return the Status */
return Status;
}
/* PUBLIC FUNCTIONS ***********************************************************/
/*
* @implemented
*/
NTSTATUS
NTAPI
IoCreateDriver(IN PUNICODE_STRING DriverName OPTIONAL,
IN PDRIVER_INITIALIZE InitializationFunction)
{
PDRIVER_OBJECT DriverObject;
return IopCreateDriver(DriverName, InitializationFunction, NULL, DriverName, NULL, &DriverObject);
}
/*
* @implemented
*/
VOID
NTAPI
IoDeleteDriver(IN PDRIVER_OBJECT DriverObject)
{
/* Simply dereference the Object */
ObDereferenceObject(DriverObject);
}
/*
* @implemented
*/
VOID
NTAPI
IoRegisterBootDriverReinitialization(IN PDRIVER_OBJECT DriverObject,
IN PDRIVER_REINITIALIZE ReinitRoutine,
IN PVOID Context)
{
PDRIVER_REINIT_ITEM ReinitItem;
/* Allocate the entry */
ReinitItem = ExAllocatePoolWithTag(NonPagedPool,
sizeof(DRIVER_REINIT_ITEM),
TAG_REINIT);
if (!ReinitItem) return;
/* Fill it out */
ReinitItem->DriverObject = DriverObject;
ReinitItem->ReinitRoutine = ReinitRoutine;
ReinitItem->Context = Context;
/* Set the Driver Object flag and insert the entry into the list */
DriverObject->Flags |= DRVO_BOOTREINIT_REGISTERED;
ExInterlockedInsertTailList(&DriverBootReinitListHead,
&ReinitItem->ItemEntry,
&DriverBootReinitListLock);
}
/*
* @implemented
*/
VOID
NTAPI
IoRegisterDriverReinitialization(IN PDRIVER_OBJECT DriverObject,
IN PDRIVER_REINITIALIZE ReinitRoutine,
IN PVOID Context)
{
PDRIVER_REINIT_ITEM ReinitItem;
/* Allocate the entry */
ReinitItem = ExAllocatePoolWithTag(NonPagedPool,
sizeof(DRIVER_REINIT_ITEM),
TAG_REINIT);
if (!ReinitItem) return;
/* Fill it out */
ReinitItem->DriverObject = DriverObject;
ReinitItem->ReinitRoutine = ReinitRoutine;
ReinitItem->Context = Context;
/* Set the Driver Object flag and insert the entry into the list */
DriverObject->Flags |= DRVO_REINIT_REGISTERED;
ExInterlockedInsertTailList(&DriverReinitListHead,
&ReinitItem->ItemEntry,
&DriverReinitListLock);
}
/*
* @implemented
*/
NTSTATUS
NTAPI
IoAllocateDriverObjectExtension(IN PDRIVER_OBJECT DriverObject,
IN PVOID ClientIdentificationAddress,
IN ULONG DriverObjectExtensionSize,
OUT PVOID *DriverObjectExtension)
{
KIRQL OldIrql;
PIO_CLIENT_EXTENSION DriverExtensions, NewDriverExtension;
BOOLEAN Inserted = FALSE;
/* Assume failure */
*DriverObjectExtension = NULL;
/* Allocate the extension */
NewDriverExtension = ExAllocatePoolWithTag(NonPagedPool,
sizeof(IO_CLIENT_EXTENSION) +
DriverObjectExtensionSize,
TAG_DRIVER_EXTENSION);
if (!NewDriverExtension) return STATUS_INSUFFICIENT_RESOURCES;
/* Clear the extension for teh caller */
RtlZeroMemory(NewDriverExtension,
sizeof(IO_CLIENT_EXTENSION) + DriverObjectExtensionSize);
/* Acqure lock */
OldIrql = KeRaiseIrqlToDpcLevel();
/* Fill out the extension */
NewDriverExtension->ClientIdentificationAddress = ClientIdentificationAddress;
/* Loop the current extensions */
DriverExtensions = IoGetDrvObjExtension(DriverObject)->
ClientDriverExtension;
while (DriverExtensions)
{
/* Check if the identifier matches */
if (DriverExtensions->ClientIdentificationAddress ==
ClientIdentificationAddress)
{
/* We have a collision, break out */
break;
}
/* Go to the next one */
DriverExtensions = DriverExtensions->NextExtension;
}
/* Check if we didn't collide */
if (!DriverExtensions)
{
/* Link this one in */
NewDriverExtension->NextExtension =
IoGetDrvObjExtension(DriverObject)->ClientDriverExtension;
IoGetDrvObjExtension(DriverObject)->ClientDriverExtension =
NewDriverExtension;
Inserted = TRUE;
}
/* Release the lock */
KeLowerIrql(OldIrql);
/* Check if insertion failed */
if (!Inserted)
{
/* Free the entry and fail */
ExFreePoolWithTag(NewDriverExtension, TAG_DRIVER_EXTENSION);
return STATUS_OBJECT_NAME_COLLISION;
}
/* Otherwise, return the pointer */
*DriverObjectExtension = NewDriverExtension + 1;
return STATUS_SUCCESS;
}
/*
* @implemented
*/
PVOID
NTAPI
IoGetDriverObjectExtension(IN PDRIVER_OBJECT DriverObject,
IN PVOID ClientIdentificationAddress)
{
KIRQL OldIrql;
PIO_CLIENT_EXTENSION DriverExtensions;
/* Acquire lock */
OldIrql = KeRaiseIrqlToDpcLevel();
/* Loop the list until we find the right one */
DriverExtensions = IoGetDrvObjExtension(DriverObject)->ClientDriverExtension;
while (DriverExtensions)
{
/* Check for a match */
if (DriverExtensions->ClientIdentificationAddress ==
ClientIdentificationAddress)
{
/* Break out */
break;
}
/* Keep looping */
DriverExtensions = DriverExtensions->NextExtension;
}
/* Release lock */
KeLowerIrql(OldIrql);
/* Return nothing or the extension */
if (!DriverExtensions) return NULL;
return DriverExtensions + 1;
}
VOID
NTAPI
IopLoadUnloadDriverWorker(
_Inout_ PVOID Parameter)
{
PLOAD_UNLOAD_PARAMS LoadParams = Parameter;
ASSERT(PsGetCurrentProcess() == PsInitialSystemProcess);
LoadParams->Status = IopLoadUnloadDriver(LoadParams->RegistryPath,
&LoadParams->DriverObject);
KeSetEvent(&LoadParams->Event, 0, FALSE);
}
NTSTATUS
NTAPI
IopLoadUnloadDriver(
_In_opt_ PCUNICODE_STRING RegistryPath,
_Inout_ PDRIVER_OBJECT *DriverObject)
{
RTL_QUERY_REGISTRY_TABLE QueryTable[3];
UNICODE_STRING ImagePath;
UNICODE_STRING ServiceName;
NTSTATUS Status;
ULONG Type;
PDEVICE_NODE DeviceNode;
PLDR_DATA_TABLE_ENTRY ModuleObject;
PVOID BaseAddress;
WCHAR *cur;
/* Load/Unload must be called from system process */
if (PsGetCurrentProcess() != PsInitialSystemProcess)
{
LOAD_UNLOAD_PARAMS LoadParams;
/* Prepare parameters block */
LoadParams.RegistryPath = RegistryPath;
LoadParams.DriverObject = *DriverObject;
KeInitializeEvent(&LoadParams.Event, NotificationEvent, FALSE);
/* Initialize and queue a work item */
ExInitializeWorkItem(&LoadParams.WorkItem,
IopLoadUnloadDriverWorker,
&LoadParams);
ExQueueWorkItem(&LoadParams.WorkItem, DelayedWorkQueue);
/* And wait till it completes */
KeWaitForSingleObject(&LoadParams.Event,
UserRequest,
KernelMode,
FALSE,
NULL);
return LoadParams.Status;
}
/* Check if it's an unload request */
if (*DriverObject)
{
(*DriverObject)->DriverUnload(*DriverObject);
return STATUS_SUCCESS;
}
RtlInitUnicodeString(&ImagePath, NULL);
/*
* Get the service name from the registry key name.
*/
ASSERT(RegistryPath->Length >= sizeof(WCHAR));
ServiceName = *RegistryPath;
cur = RegistryPath->Buffer + RegistryPath->Length / sizeof(WCHAR) - 1;
while (RegistryPath->Buffer != cur)
{
if (*cur == L'\\')
{
ServiceName.Buffer = cur + 1;
ServiceName.Length = RegistryPath->Length -
(USHORT)((ULONG_PTR)ServiceName.Buffer -
(ULONG_PTR)RegistryPath->Buffer);
break;
}
cur--;
}
/*
* Get service type.
*/
RtlZeroMemory(&QueryTable, sizeof(QueryTable));
RtlInitUnicodeString(&ImagePath, NULL);
QueryTable[0].Name = L"Type";
QueryTable[0].Flags = RTL_QUERY_REGISTRY_DIRECT | RTL_QUERY_REGISTRY_REQUIRED;
QueryTable[0].EntryContext = &Type;
QueryTable[1].Name = L"ImagePath";
QueryTable[1].Flags = RTL_QUERY_REGISTRY_DIRECT;
QueryTable[1].EntryContext = &ImagePath;
Status = RtlQueryRegistryValues(RTL_REGISTRY_ABSOLUTE,
RegistryPath->Buffer,
QueryTable, NULL, NULL);
if (!NT_SUCCESS(Status))
{
DPRINT("RtlQueryRegistryValues() failed (Status %lx)\n", Status);
if (ImagePath.Buffer) ExFreePool(ImagePath.Buffer);
return Status;
}
/*
* Normalize the image path for all later processing.
*/
Status = IopNormalizeImagePath(&ImagePath, &ServiceName);
if (!NT_SUCCESS(Status))
{
DPRINT("IopNormalizeImagePath() failed (Status %x)\n", Status);
return Status;
}
DPRINT("FullImagePath: '%wZ'\n", &ImagePath);
DPRINT("Type: %lx\n", Type);
KeEnterCriticalRegion();
ExAcquireResourceExclusiveLite(&IopDriverLoadResource, TRUE);
/*
* Get existing DriverObject pointer (in case the driver
* has already been loaded and initialized).
*/
Status = IopGetDriverObject(DriverObject,
&ServiceName,
(Type == SERVICE_FILE_SYSTEM_DRIVER ||
Type == SERVICE_RECOGNIZER_DRIVER));
if (!NT_SUCCESS(Status))
{
/*
* Load the driver module
*/
DPRINT("Loading module from %wZ\n", &ImagePath);
Status = MmLoadSystemImage(&ImagePath, NULL, NULL, 0, (PVOID)&ModuleObject, &BaseAddress);
if (!NT_SUCCESS(Status))
{
DPRINT("MmLoadSystemImage() failed (Status %lx)\n", Status);
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
return Status;
}
/*
* Initialize the driver module if it's loaded for the first time
*/
Status = IopCreateDeviceNode(IopRootDeviceNode, NULL, &ServiceName, &DeviceNode);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopCreateDeviceNode() failed (Status %lx)\n", Status);
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
MmUnloadSystemImage(ModuleObject);
return Status;
}
IopDisplayLoadingMessage(&DeviceNode->ServiceName);
Status = IopInitializeDriverModule(DeviceNode,
ModuleObject,
&DeviceNode->ServiceName,
(Type == SERVICE_FILE_SYSTEM_DRIVER ||
Type == SERVICE_RECOGNIZER_DRIVER),
DriverObject);
if (!NT_SUCCESS(Status))
{
DPRINT1("IopInitializeDriverModule() failed (Status %lx)\n", Status);
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
MmUnloadSystemImage(ModuleObject);
return Status;
}
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
/* Initialize and start device */
IopInitializeDevice(DeviceNode, *DriverObject);
Status = IopStartDevice(DeviceNode);
}
else
{
ExReleaseResourceLite(&IopDriverLoadResource);
KeLeaveCriticalRegion();
DPRINT("DriverObject already exist in ObjectManager\n");
Status = STATUS_IMAGE_ALREADY_LOADED;
/* IopGetDriverObject references the DriverObject, so dereference it */
ObDereferenceObject(*DriverObject);
}
return Status;
}
/*
* NtLoadDriver
*
* Loads a device driver.
*
* Parameters
* DriverServiceName
* Name of the service to load (registry key).
*
* Return Value
* Status
*
* Status
* implemented
*/
NTSTATUS NTAPI
NtLoadDriver(IN PUNICODE_STRING DriverServiceName)
{
UNICODE_STRING CapturedDriverServiceName = { 0, 0, NULL };
KPROCESSOR_MODE PreviousMode;
PDRIVER_OBJECT DriverObject;
NTSTATUS Status;
PAGED_CODE();
PreviousMode = KeGetPreviousMode();
/*
* Check security privileges
*/
if (!SeSinglePrivilegeCheck(SeLoadDriverPrivilege, PreviousMode))
{
DPRINT("Privilege not held\n");
return STATUS_PRIVILEGE_NOT_HELD;
}
Status = ProbeAndCaptureUnicodeString(&CapturedDriverServiceName,
PreviousMode,
DriverServiceName);
if (!NT_SUCCESS(Status))
{
return Status;
}
DPRINT("NtLoadDriver('%wZ')\n", &CapturedDriverServiceName);
/* Load driver and call its entry point */
DriverObject = NULL;
Status = IopLoadUnloadDriver(&CapturedDriverServiceName, &DriverObject);
ReleaseCapturedUnicodeString(&CapturedDriverServiceName,
PreviousMode);
return Status;
}
/*
* NtUnloadDriver
*
* Unloads a legacy device driver.
*
* Parameters
* DriverServiceName
* Name of the service to unload (registry key).
*
* Return Value
* Status
*
* Status
* implemented
*/
NTSTATUS NTAPI
NtUnloadDriver(IN PUNICODE_STRING DriverServiceName)
{
return IopUnloadDriver(DriverServiceName, FALSE);
}
/* EOF */
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