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reactos/drivers/filesystems/fastfat/fatinit.c

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/*++
Copyright (c) 1989-2000 Microsoft Corporation
Module Name:
FatInit.c
Abstract:
This module implements the DRIVER_INITIALIZATION routine for Fat
--*/
#include "fatprocs.h"
DRIVER_INITIALIZE DriverEntry;
NTSTATUS
NTAPI
DriverEntry(
_In_ PDRIVER_OBJECT DriverObject,
_In_ PUNICODE_STRING RegistryPath
);
_Function_class_(DRIVER_UNLOAD)
VOID
NTAPI
FatUnload(
_In_ _Unreferenced_parameter_ PDRIVER_OBJECT DriverObject
);
NTSTATUS
FatGetCompatibilityModeValue(
IN PUNICODE_STRING ValueName,
IN OUT PULONG Value
);
BOOLEAN
FatIsFujitsuFMR (
);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(INIT, DriverEntry)
#pragma alloc_text(INIT, FatGetCompatibilityModeValue)
#pragma alloc_text(INIT, FatIsFujitsuFMR)
//#pragma alloc_text(PAGE, FatUnload)
#endif
#define COMPATIBILITY_MODE_KEY_NAME L"\\Registry\\Machine\\System\\CurrentControlSet\\Control\\FileSystem"
#define COMPATIBILITY_MODE_VALUE_NAME L"Win31FileSystem"
#define CODE_PAGE_INVARIANCE_VALUE_NAME L"FatDisableCodePageInvariance"
#define KEY_WORK_AREA ((sizeof(KEY_VALUE_FULL_INFORMATION) + \
sizeof(ULONG)) + 64)
#define REGISTRY_HARDWARE_DESCRIPTION_W \
L"\\Registry\\Machine\\Hardware\\DESCRIPTION\\System"
#define REGISTRY_MACHINE_IDENTIFIER_W L"Identifier"
#define FUJITSU_FMR_NAME_W L"FUJITSU FMR-"
NTSTATUS
NTAPI
DriverEntry(
_In_ PDRIVER_OBJECT DriverObject,
_In_ PUNICODE_STRING RegistryPath
)
/*++
Routine Description:
This is the initialization routine for the Fat file system
device driver. This routine creates the device object for the FileSystem
device and performs all other driver initialization.
Arguments:
DriverObject - Pointer to driver object created by the system.
Return Value:
NTSTATUS - The function value is the final status from the initialization
operation.
--*/
{
USHORT MaxDepth;
NTSTATUS Status;
UNICODE_STRING UnicodeString;
FS_FILTER_CALLBACKS FilterCallbacks;
UNICODE_STRING ValueName;
ULONG Value;
UNREFERENCED_PARAMETER( RegistryPath );
//
// Create the device object for disks. To avoid problems with filters who
// know this name, we must keep it.
//
RtlInitUnicodeString( &UnicodeString, L"\\Fat" );
Status = IoCreateDevice( DriverObject,
0,
&UnicodeString,
FILE_DEVICE_DISK_FILE_SYSTEM,
0,
FALSE,
&FatDiskFileSystemDeviceObject );
if (!NT_SUCCESS( Status )) {
return Status;
}
//
// Create the device object for "cdroms".
//
RtlInitUnicodeString( &UnicodeString, L"\\FatCdrom" );
Status = IoCreateDevice( DriverObject,
0,
&UnicodeString,
FILE_DEVICE_CD_ROM_FILE_SYSTEM,
0,
FALSE,
&FatCdromFileSystemDeviceObject );
if (!NT_SUCCESS( Status )) {
IoDeleteDevice( FatDiskFileSystemDeviceObject);
return Status;
}
#ifdef _MSC_VER
#pragma prefast( push )
#pragma prefast( disable:28155, "these are all correct" )
#pragma prefast( disable:28169, "these are all correct" )
#pragma prefast( disable:28175, "this is a filesystem, touching FastIoDispatch is allowed" )
#endif
DriverObject->DriverUnload = FatUnload;
//
// Note that because of the way data caching is done, we set neither
// the Direct I/O or Buffered I/O bit in DeviceObject->Flags. If
// data is not in the cache, or the request is not buffered, we may,
// set up for Direct I/O by hand.
//
//
// Initialize the driver object with this driver's entry points.
//
DriverObject->MajorFunction[IRP_MJ_CREATE] = (PDRIVER_DISPATCH)FatFsdCreate;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = (PDRIVER_DISPATCH)FatFsdClose;
DriverObject->MajorFunction[IRP_MJ_READ] = (PDRIVER_DISPATCH)FatFsdRead;
DriverObject->MajorFunction[IRP_MJ_WRITE] = (PDRIVER_DISPATCH)FatFsdWrite;
DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = (PDRIVER_DISPATCH)FatFsdQueryInformation;
DriverObject->MajorFunction[IRP_MJ_SET_INFORMATION] = (PDRIVER_DISPATCH)FatFsdSetInformation;
DriverObject->MajorFunction[IRP_MJ_QUERY_EA] = (PDRIVER_DISPATCH)FatFsdQueryEa;
DriverObject->MajorFunction[IRP_MJ_SET_EA] = (PDRIVER_DISPATCH)FatFsdSetEa;
DriverObject->MajorFunction[IRP_MJ_FLUSH_BUFFERS] = (PDRIVER_DISPATCH)FatFsdFlushBuffers;
DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = (PDRIVER_DISPATCH)FatFsdQueryVolumeInformation;
DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = (PDRIVER_DISPATCH)FatFsdSetVolumeInformation;
DriverObject->MajorFunction[IRP_MJ_CLEANUP] = (PDRIVER_DISPATCH)FatFsdCleanup;
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = (PDRIVER_DISPATCH)FatFsdDirectoryControl;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = (PDRIVER_DISPATCH)FatFsdFileSystemControl;
DriverObject->MajorFunction[IRP_MJ_LOCK_CONTROL] = (PDRIVER_DISPATCH)FatFsdLockControl;
DriverObject->MajorFunction[IRP_MJ_DEVICE_CONTROL] = (PDRIVER_DISPATCH)FatFsdDeviceControl;
DriverObject->MajorFunction[IRP_MJ_SHUTDOWN] = (PDRIVER_DISPATCH)FatFsdShutdown;
DriverObject->MajorFunction[IRP_MJ_PNP] = (PDRIVER_DISPATCH)FatFsdPnp;
DriverObject->FastIoDispatch = &FatFastIoDispatch;
RtlZeroMemory(&FatFastIoDispatch, sizeof(FatFastIoDispatch));
FatFastIoDispatch.SizeOfFastIoDispatch = sizeof(FAST_IO_DISPATCH);
FatFastIoDispatch.FastIoCheckIfPossible = FatFastIoCheckIfPossible; // CheckForFastIo
FatFastIoDispatch.FastIoRead = FsRtlCopyRead; // Read
FatFastIoDispatch.FastIoWrite = FsRtlCopyWrite; // Write
FatFastIoDispatch.FastIoQueryBasicInfo = FatFastQueryBasicInfo; // QueryBasicInfo
FatFastIoDispatch.FastIoQueryStandardInfo = FatFastQueryStdInfo; // QueryStandardInfo
FatFastIoDispatch.FastIoLock = FatFastLock; // Lock
FatFastIoDispatch.FastIoUnlockSingle = FatFastUnlockSingle; // UnlockSingle
FatFastIoDispatch.FastIoUnlockAll = FatFastUnlockAll; // UnlockAll
FatFastIoDispatch.FastIoUnlockAllByKey = FatFastUnlockAllByKey; // UnlockAllByKey
FatFastIoDispatch.FastIoQueryNetworkOpenInfo = FatFastQueryNetworkOpenInfo;
FatFastIoDispatch.AcquireForCcFlush = FatAcquireForCcFlush;
FatFastIoDispatch.ReleaseForCcFlush = FatReleaseForCcFlush;
FatFastIoDispatch.MdlRead = FsRtlMdlReadDev;
FatFastIoDispatch.MdlReadComplete = FsRtlMdlReadCompleteDev;
FatFastIoDispatch.PrepareMdlWrite = FsRtlPrepareMdlWriteDev;
FatFastIoDispatch.MdlWriteComplete = FsRtlMdlWriteCompleteDev;
#ifdef _MSC_VER
#pragma prefast( pop )
#endif
//
// Initialize the filter callbacks we use.
//
RtlZeroMemory( &FilterCallbacks,
sizeof(FS_FILTER_CALLBACKS) );
FilterCallbacks.SizeOfFsFilterCallbacks = sizeof(FS_FILTER_CALLBACKS);
FilterCallbacks.PreAcquireForSectionSynchronization = FatFilterCallbackAcquireForCreateSection;
Status = FsRtlRegisterFileSystemFilterCallbacks( DriverObject,
&FilterCallbacks );
if (!NT_SUCCESS( Status )) {
IoDeleteDevice( FatDiskFileSystemDeviceObject );
IoDeleteDevice( FatCdromFileSystemDeviceObject );
return Status;
}
//
// Initialize the global data structures
//
//
// The FatData record
//
RtlZeroMemory( &FatData, sizeof(FAT_DATA));
FatData.NodeTypeCode = FAT_NTC_DATA_HEADER;
FatData.NodeByteSize = sizeof(FAT_DATA);
InitializeListHead(&FatData.VcbQueue);
FatData.DriverObject = DriverObject;
FatData.DiskFileSystemDeviceObject = FatDiskFileSystemDeviceObject;
FatData.CdromFileSystemDeviceObject = FatCdromFileSystemDeviceObject;
//
// This list head keeps track of closes yet to be done.
//
InitializeListHead( &FatData.AsyncCloseList );
InitializeListHead( &FatData.DelayedCloseList );
FatData.FatCloseItem = IoAllocateWorkItem( FatDiskFileSystemDeviceObject);
if (FatData.FatCloseItem == NULL) {
IoDeleteDevice (FatDiskFileSystemDeviceObject);
IoDeleteDevice (FatCdromFileSystemDeviceObject);
return STATUS_INSUFFICIENT_RESOURCES;
}
//
// Allocate the zero page
//
FatData.ZeroPage = ExAllocatePoolWithTag( NonPagedPoolNx, PAGE_SIZE, 'ZtaF' );
if (FatData.ZeroPage == NULL) {
IoDeleteDevice (FatDiskFileSystemDeviceObject);
IoDeleteDevice (FatCdromFileSystemDeviceObject);
return STATUS_INSUFFICIENT_RESOURCES;
}
RtlZeroMemory( FatData.ZeroPage, PAGE_SIZE );
//
// Now initialize our general purpose spinlock (gag) and figure out how
// deep and wide we want our delayed lists (along with fooling ourselves
// about the lookaside depths).
//
KeInitializeSpinLock( &FatData.GeneralSpinLock );
switch ( MmQuerySystemSize() ) {
case MmSmallSystem:
MaxDepth = 4;
FatMaxDelayedCloseCount = FAT_MAX_DELAYED_CLOSES;
break;
case MmMediumSystem:
MaxDepth = 8;
FatMaxDelayedCloseCount = 4 * FAT_MAX_DELAYED_CLOSES;
break;
case MmLargeSystem:
default:
MaxDepth = 16;
FatMaxDelayedCloseCount = 16 * FAT_MAX_DELAYED_CLOSES;
break;
}
//
// Initialize the cache manager callback routines
//
FatData.CacheManagerCallbacks.AcquireForLazyWrite = &FatAcquireFcbForLazyWrite;
FatData.CacheManagerCallbacks.ReleaseFromLazyWrite = &FatReleaseFcbFromLazyWrite;
FatData.CacheManagerCallbacks.AcquireForReadAhead = &FatAcquireFcbForReadAhead;
FatData.CacheManagerCallbacks.ReleaseFromReadAhead = &FatReleaseFcbFromReadAhead;
FatData.CacheManagerNoOpCallbacks.AcquireForLazyWrite = &FatNoOpAcquire;
FatData.CacheManagerNoOpCallbacks.ReleaseFromLazyWrite = &FatNoOpRelease;
FatData.CacheManagerNoOpCallbacks.AcquireForReadAhead = &FatNoOpAcquire;
FatData.CacheManagerNoOpCallbacks.ReleaseFromReadAhead = &FatNoOpRelease;
//
// Set up global pointer to our process.
//
FatData.OurProcess = PsGetCurrentProcess();
//
// Setup the number of processors we support for statistics as the current number
// running.
//
#if (NTDDI_VERSION >= NTDDI_VISTA)
FatData.NumberProcessors = KeQueryActiveProcessorCount( NULL );
#else
FatData.NumberProcessors = KeNumberProcessors;
#endif
//
// Read the registry to determine if we are in ChicagoMode.
//
ValueName.Buffer = COMPATIBILITY_MODE_VALUE_NAME;
ValueName.Length = sizeof(COMPATIBILITY_MODE_VALUE_NAME) - sizeof(WCHAR);
ValueName.MaximumLength = sizeof(COMPATIBILITY_MODE_VALUE_NAME);
Status = FatGetCompatibilityModeValue( &ValueName, &Value );
if (NT_SUCCESS(Status) && FlagOn(Value, 1)) {
FatData.ChicagoMode = FALSE;
} else {
FatData.ChicagoMode = TRUE;
}
//
// Read the registry to determine if we are going to generate LFNs
// for valid 8.3 names with extended characters.
//
ValueName.Buffer = CODE_PAGE_INVARIANCE_VALUE_NAME;
ValueName.Length = sizeof(CODE_PAGE_INVARIANCE_VALUE_NAME) - sizeof(WCHAR);
ValueName.MaximumLength = sizeof(CODE_PAGE_INVARIANCE_VALUE_NAME);
Status = FatGetCompatibilityModeValue( &ValueName, &Value );
if (NT_SUCCESS(Status) && FlagOn(Value, 1)) {
FatData.CodePageInvariant = FALSE;
} else {
FatData.CodePageInvariant = TRUE;
}
//
// Initialize our global resource and fire up the lookaside lists.
//
ExInitializeResourceLite( &FatData.Resource );
ExInitializeNPagedLookasideList( &FatIrpContextLookasideList,
NULL,
NULL,
POOL_NX_ALLOCATION | POOL_RAISE_IF_ALLOCATION_FAILURE,
sizeof(IRP_CONTEXT),
TAG_IRP_CONTEXT,
MaxDepth );
ExInitializeNPagedLookasideList( &FatNonPagedFcbLookasideList,
NULL,
NULL,
POOL_NX_ALLOCATION | POOL_RAISE_IF_ALLOCATION_FAILURE,
sizeof(NON_PAGED_FCB),
TAG_FCB_NONPAGED,
MaxDepth );
ExInitializeNPagedLookasideList( &FatEResourceLookasideList,
NULL,
NULL,
POOL_NX_ALLOCATION | POOL_RAISE_IF_ALLOCATION_FAILURE,
sizeof(ERESOURCE),
TAG_ERESOURCE,
MaxDepth );
ExInitializeSListHead( &FatCloseContextSList );
ExInitializeFastMutex( &FatCloseQueueMutex );
KeInitializeEvent( &FatReserveEvent, SynchronizationEvent, TRUE );
//
// Register the file system with the I/O system
//
IoRegisterFileSystem(FatDiskFileSystemDeviceObject);
ObReferenceObject (FatDiskFileSystemDeviceObject);
IoRegisterFileSystem(FatCdromFileSystemDeviceObject);
ObReferenceObject (FatCdromFileSystemDeviceObject);
//
// Find out if we are running an a FujitsuFMR machine.
//
FatData.FujitsuFMR = FatIsFujitsuFMR();
#if (NTDDI_VERSION >= NTDDI_WIN8)
//
// Find out global disk accounting state, cache the result
//
FatDiskAccountingEnabled = PsIsDiskCountersEnabled();
#endif
//
// And return to our caller
//
return( STATUS_SUCCESS );
}
_Function_class_(DRIVER_UNLOAD)
VOID
NTAPI
FatUnload(
_In_ _Unreferenced_parameter_ PDRIVER_OBJECT DriverObject
)
/*++
Routine Description:
This is the unload routine for the filesystem
Arguments:
DriverObject - Pointer to driver object created by the system.
Return Value:
None
--*/
{
UNREFERENCED_PARAMETER( DriverObject );
ExDeleteNPagedLookasideList (&FatEResourceLookasideList);
ExDeleteNPagedLookasideList (&FatNonPagedFcbLookasideList);
ExDeleteNPagedLookasideList (&FatIrpContextLookasideList);
ExDeleteResourceLite( &FatData.Resource );
IoFreeWorkItem (FatData.FatCloseItem);
ObDereferenceObject( FatDiskFileSystemDeviceObject);
ObDereferenceObject( FatCdromFileSystemDeviceObject);
}
//
// Local Support routine
//
NTSTATUS
FatGetCompatibilityModeValue (
IN PUNICODE_STRING ValueName,
IN OUT PULONG Value
)
/*++
Routine Description:
Given a unicode value name this routine will go into the registry
location for the Chicago compatibilitymode information and get the
value.
Arguments:
ValueName - the unicode name for the registry value located in the registry.
Value - a pointer to the ULONG for the result.
Return Value:
NTSTATUS
If STATUS_SUCCESSFUL is returned, the location *Value will be
updated with the DWORD value from the registry. If any failing
status is returned, this value is untouched.
--*/
{
HANDLE Handle;
NTSTATUS Status;
ULONG RequestLength;
ULONG ResultLength;
UCHAR Buffer[KEY_WORK_AREA];
UNICODE_STRING KeyName;
OBJECT_ATTRIBUTES ObjectAttributes;
PKEY_VALUE_FULL_INFORMATION KeyValueInformation;
KeyName.Buffer = COMPATIBILITY_MODE_KEY_NAME;
KeyName.Length = sizeof(COMPATIBILITY_MODE_KEY_NAME) - sizeof(WCHAR);
KeyName.MaximumLength = sizeof(COMPATIBILITY_MODE_KEY_NAME);
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = ZwOpenKey(&Handle,
KEY_READ,
&ObjectAttributes);
if (!NT_SUCCESS(Status)) {
return Status;
}
RequestLength = KEY_WORK_AREA;
KeyValueInformation = (PKEY_VALUE_FULL_INFORMATION)Buffer;
while (1) {
Status = ZwQueryValueKey(Handle,
ValueName,
KeyValueFullInformation,
KeyValueInformation,
RequestLength,
&ResultLength);
NT_ASSERT( Status != STATUS_BUFFER_OVERFLOW );
if (Status == STATUS_BUFFER_OVERFLOW) {
//
// Try to get a buffer big enough.
//
if (KeyValueInformation != (PKEY_VALUE_FULL_INFORMATION)Buffer) {
ExFreePool(KeyValueInformation);
}
RequestLength += 256;
KeyValueInformation = (PKEY_VALUE_FULL_INFORMATION)
ExAllocatePoolWithTag(PagedPool,
RequestLength,
' taF');
if (!KeyValueInformation) {
ZwClose(Handle);
return STATUS_NO_MEMORY;
}
} else {
break;
}
}
ZwClose(Handle);
if (NT_SUCCESS(Status)) {
if (KeyValueInformation->DataLength != 0) {
PULONG DataPtr;
//
// Return contents to the caller.
//
DataPtr = (PULONG)
((PUCHAR)KeyValueInformation + KeyValueInformation->DataOffset);
*Value = *DataPtr;
} else {
//
// Treat as if no value was found
//
Status = STATUS_OBJECT_NAME_NOT_FOUND;
}
}
if (KeyValueInformation != (PKEY_VALUE_FULL_INFORMATION)Buffer) {
ExFreePool(KeyValueInformation);
}
return Status;
}
//
// Local Support routine
//
BOOLEAN
FatIsFujitsuFMR (
)
/*++
Routine Description:
This routine tells us if we are running on a FujitsuFMR machine.
Arguments:
Return Value:
BOOLEAN - TRUE if we are and FALSE otherwise
--*/
{
BOOLEAN Result;
HANDLE Handle;
NTSTATUS Status;
ULONG RequestLength;
ULONG ResultLength;
UCHAR Buffer[KEY_WORK_AREA];
UNICODE_STRING KeyName;
UNICODE_STRING ValueName;
OBJECT_ATTRIBUTES ObjectAttributes;
PKEY_VALUE_FULL_INFORMATION KeyValueInformation;
//
// Set default as PC/AT
//
KeyName.Buffer = REGISTRY_HARDWARE_DESCRIPTION_W;
KeyName.Length = sizeof(REGISTRY_HARDWARE_DESCRIPTION_W) - sizeof(WCHAR);
KeyName.MaximumLength = sizeof(REGISTRY_HARDWARE_DESCRIPTION_W);
InitializeObjectAttributes(&ObjectAttributes,
&KeyName,
OBJ_CASE_INSENSITIVE,
NULL,
NULL);
Status = ZwOpenKey(&Handle,
KEY_READ,
&ObjectAttributes);
if (!NT_SUCCESS(Status)) {
return FALSE;
}
ValueName.Buffer = REGISTRY_MACHINE_IDENTIFIER_W;
ValueName.Length = sizeof(REGISTRY_MACHINE_IDENTIFIER_W) - sizeof(WCHAR);
ValueName.MaximumLength = sizeof(REGISTRY_MACHINE_IDENTIFIER_W);
RequestLength = KEY_WORK_AREA;
KeyValueInformation = (PKEY_VALUE_FULL_INFORMATION)Buffer;
while (1) {
Status = ZwQueryValueKey(Handle,
&ValueName,
KeyValueFullInformation,
KeyValueInformation,
RequestLength,
&ResultLength);
// NT_ASSERT( Status != STATUS_BUFFER_OVERFLOW );
if (Status == STATUS_BUFFER_OVERFLOW) {
//
// Try to get a buffer big enough.
//
if (KeyValueInformation != (PKEY_VALUE_FULL_INFORMATION)Buffer) {
ExFreePool(KeyValueInformation);
}
RequestLength += 256;
KeyValueInformation = (PKEY_VALUE_FULL_INFORMATION)
ExAllocatePoolWithTag(PagedPool, RequestLength, ' taF');
if (!KeyValueInformation) {
ZwClose(Handle);
return FALSE;
}
} else {
break;
}
}
ZwClose(Handle);
if (NT_SUCCESS(Status) &&
(KeyValueInformation->DataLength >= sizeof(FUJITSU_FMR_NAME_W)) &&
(RtlCompareMemory((PUCHAR)KeyValueInformation + KeyValueInformation->DataOffset,
FUJITSU_FMR_NAME_W,
sizeof(FUJITSU_FMR_NAME_W) - sizeof(WCHAR)) ==
sizeof(FUJITSU_FMR_NAME_W) - sizeof(WCHAR))) {
Result = TRUE;
} else {
Result = FALSE;
}
if (KeyValueInformation != (PKEY_VALUE_FULL_INFORMATION)Buffer) {
ExFreePool(KeyValueInformation);
}
return Result;
}
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