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Rewritten NTFS driver entry :

Browse source 
- Use Hervé debug method (better), thanks to Hervé
- Use NTAPI instead of STDCALL to have MSVC compatibility, thanks to Hervé
- Moved IRP functions array to a new function, NtfsInitializeFunctionPointers
- Added more checks
- Initialize global and local data before acting with kernel
- Removeed the use of one var
That should be all....

svn path=/trunk/; revision=31747
This commit is contained in:
Pierre Schweitzer 2008-01-12 20:54:41 +00:00
parent 6072b41a71
commit 8d54c16b65
2 changed files with 86 additions and 44 deletions
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112
reactos/drivers/filesystems/ntfs/ntfs.c
View file

@ -23,6 +23,7 @@
* FILE: services/fs/ntfs/ntfs.c
* PURPOSE: NTFS filesystem driver
* PROGRAMMER: Eric Kohl
* Pierre Schweitzer
*/
/* INCLUDES *****************************************************************/
@ -34,12 +35,12 @@
/* GLOBALS *****************************************************************/
PNTFS_GLOBAL_DATA NtfsGlobalData;
PNTFS_GLOBAL_DATA NtfsGlobalData = NULL;
/* FUNCTIONS ****************************************************************/
NTSTATUS STDCALL
NTSTATUS NTAPI
DriverEntry(PDRIVER_OBJECT DriverObject,
PUNICODE_STRING RegistryPath)
/*
@ -50,52 +51,83 @@ DriverEntry(PDRIVER_OBJECT DriverObject,
* RETURNS: Success or failure
*/
{
PDEVICE_OBJECT DeviceObject;
NTSTATUS Status;
UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(L"\\Ntfs");
UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(DEVICE_NAME);
DPRINT("NTFS 0.0.1\n");
Status = IoCreateDevice(DriverObject,
sizeof(NTFS_GLOBAL_DATA),
&DeviceName,
FILE_DEVICE_DISK_FILE_SYSTEM,
0,
FALSE,
&DeviceObject);
if (!NT_SUCCESS(Status))
{
return(Status);
}
TRACE_(NTFS, "DriverEntry(%p, '%wZ')\n", DriverObject, RegistryPath);
/* Initialize global data */
NtfsGlobalData = DeviceObject->DeviceExtension;
RtlZeroMemory(NtfsGlobalData,
sizeof(NTFS_GLOBAL_DATA));
NtfsGlobalData = ExAllocatePoolWithTag(NonPagedPool, sizeof(NTFS_GLOBAL_DATA), TAG('N', 'D', 'R', 'G'));
if (!NtfsGlobalData)
{
Status = STATUS_INSUFFICIENT_RESOURCES;
goto ErrorEnd;
}
RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
ExInitializeResourceLite(&NtfsGlobalData->Resource);
/* Keep trace of Driver Object */
NtfsGlobalData->DriverObject = DriverObject;
NtfsGlobalData->DeviceObject = DeviceObject;
/* Initialize driver data */
DeviceObject->Flags |= DO_DIRECT_IO;
DriverObject->MajorFunction[IRP_MJ_CLOSE] = NtfsClose;
DriverObject->MajorFunction[IRP_MJ_CREATE] = NtfsCreate;
DriverObject->MajorFunction[IRP_MJ_READ] = NtfsRead;
DriverObject->MajorFunction[IRP_MJ_WRITE] = NtfsWrite;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] =
NtfsFileSystemControl;
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] =
NtfsDirectoryControl;
DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] =
NtfsQueryInformation;
DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] =
NtfsQueryVolumeInformation;
DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] =
NtfsSetVolumeInformation;
/* Initialize IRP functions array */
NtfsInitializeFunctionPointers(DriverObject);
/* Driver can't be unloaded */
DriverObject->DriverUnload = NULL;
IoRegisterFileSystem(DeviceObject);
Status = IoCreateDevice(DriverObject,
sizeof(NTFS_GLOBAL_DATA),
&DeviceName,
FILE_DEVICE_DISK_FILE_SYSTEM,
0,
FALSE,
&NtfsGlobalData->DeviceObject);
if (!NT_SUCCESS(Status))
{
WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
goto ErrorEnd;
}
return(STATUS_SUCCESS);
/* Register file system */
IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
ObReferenceObject(NtfsGlobalData->DeviceObject);
ErrorEnd:
if (!NT_SUCCESS(Status))
{
if (NtfsGlobalData)
{
ExDeleteResourceLite(&NtfsGlobalData->Resource);
ExFreePoolWithTag(NtfsGlobalData, TAG('N', 'D', 'R', 'G'));
}
}
return Status;
}
VOID NTAPI
NtfsInitializeFunctionPointers(PDRIVER_OBJECT DriverObject)
/*
* FUNCTION: Called within the driver entry to initialize the IRP functions array
* ARGUMENTS:
* DriverObject = object describing this driver
* RETURNS: Nothing
*/
{
DriverObject->MajorFunction[IRP_MJ_CLOSE] = NtfsClose;
DriverObject->MajorFunction[IRP_MJ_CREATE] = NtfsCreate;
DriverObject->MajorFunction[IRP_MJ_READ] = NtfsRead;
DriverObject->MajorFunction[IRP_MJ_WRITE] = NtfsWrite;
DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = NtfsFileSystemControl;
DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = NtfsDirectoryControl;
DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = NtfsQueryInformation;
DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = NtfsQueryVolumeInformation;
DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = NtfsSetVolumeInformation;
return;
}