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- Implement RamdiskCreateRamdisk which validates parameters before calling RamdiskCreateDiskDevice (stub).

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- Implement RamdiskDeviceControl which only supports FSCTL_CREATE_RAM_DISK for now (the kernel's attempt to create the RAM disk).
- Need to implement RamdiskCreateDiskDevice.


svn path=/trunk/; revision=34453
This commit is contained in:
ReactOS Portable Systems Group 2008-07-13 07:37:36 +00:00
parent b01a6a6b8e
commit b60783d6c5
1 changed files with 198 additions and 2 deletions
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200
reactos/drivers/storage/class/ramdisk/ramdisk.c
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@ -257,14 +257,210 @@ RamdiskReadWrite(IN PDEVICE_OBJECT DeviceObject,
NTSTATUS
NTAPI
RamdiskDeviceControl(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
RamdiskCreateDiskDevice(IN PRAMDISK_EXTENSION DeviceExtension,
IN PRAMDISK_CREATE_INPUT Input,
IN BOOLEAN ValidateOnly,
OUT PDEVICE_OBJECT *DeviceObject)
{
UNIMPLEMENTED;
while (TRUE);
return STATUS_SUCCESS;
}
NTSTATUS
NTAPI
RamdiskCreateRamdisk(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp,
IN BOOLEAN ValidateOnly)
{
PRAMDISK_CREATE_INPUT Input;
ULONG Length;
PRAMDISK_EXTENSION DeviceExtension;
ULONG DiskType;
PWCHAR FileNameStart, FileNameEnd;
NTSTATUS Status;
PIO_STACK_LOCATION IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
//
// Get the device extension and our input data
//
DeviceExtension = (PRAMDISK_EXTENSION)DeviceObject->DeviceExtension;
Length = IoStackLocation->Parameters.DeviceIoControl.InputBufferLength;
Input = (PRAMDISK_CREATE_INPUT)Irp->AssociatedIrp.SystemBuffer;
//
// Validate input parameters
//
if ((Length < sizeof(RAMDISK_CREATE_INPUT)) ||
(Input->Version != sizeof(RAMDISK_CREATE_INPUT)))
{
//
// Invalid input
//
return STATUS_INVALID_PARAMETER;
}
//
// Validate the disk type
//
DiskType = Input->DiskType;
if (DiskType == FILE_DEVICE_CONTROLLER) return STATUS_INVALID_PARAMETER;
//
// Look at the disk type
//
if (DiskType == FILE_DEVICE_CD_ROM_FILE_SYSTEM)
{
//
// We only allow this as an early-init boot
//
if (!KeLoaderBlock) return STATUS_INVALID_PARAMETER;
//
// Save command-line flags
//
if (ExportBootDiskAsCd) Input->Options.ExportAsCd = TRUE;
if (IsWinPEBoot) Input->Options.NoDriveLetter = TRUE;
}
//
// Validate the disk type
//
if ((Input->Options.ExportAsCd) && (DiskType != FILE_DEVICE_CD_ROM_FILE_SYSTEM))
{
//
// If the type isn't CDFS, it has to at least be raw CD
//
if (DiskType != FILE_DEVICE_CD_ROM) return STATUS_INVALID_PARAMETER;
}
//
// Check if this is an actual file
//
if (DiskType <= FILE_DEVICE_CD_ROM)
{
//
// Validate the file name
//
FileNameStart = (PWCHAR)((ULONG_PTR)Input + Length);
FileNameEnd = Input->FileName + 1;
while ((FileNameEnd < FileNameStart) && *(FileNameEnd)) FileNameEnd++;
if (FileNameEnd == FileNameStart) return STATUS_INVALID_PARAMETER;
}
//
// Create the actual device
//
Status = RamdiskCreateDiskDevice(DeviceExtension,
Input,
ValidateOnly,
&DeviceObject);
if (NT_SUCCESS(Status))
{
//
// Invalidate and set success
//
IoInvalidateDeviceRelations(DeviceExtension->PhysicalDeviceObject, 0);
Irp->IoStatus.Information = STATUS_SUCCESS;
}
//
// We're done
//
return Status;
}
NTSTATUS
NTAPI
RamdiskDeviceControl(IN PDEVICE_OBJECT DeviceObject,
IN PIRP Irp)
{
NTSTATUS Status;
PIO_STACK_LOCATION IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
PRAMDISK_EXTENSION DeviceExtension = DeviceObject->DeviceExtension;
ULONG Information = 0;
//
// Grab the remove lock
//
Status = IoAcquireRemoveLock(&DeviceExtension->RemoveLock, Irp);
if (!NT_SUCCESS(Status))
{
//
// Fail the IRP
//
Irp->IoStatus.Information = 0;
Irp->IoStatus.Status = Status;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
return Status;
}
//
// Check if this is an FDO or PDO
//
if (DeviceExtension->Type == RamdiskFdo)
{
//
// Check what the request is
//
switch (IoStackLocation->Parameters.DeviceIoControl.IoControlCode)
{
//
// Request to create a ramdisk
//
case FSCTL_CREATE_RAM_DISK:
//
// Do it
//
Status = RamdiskCreateRamdisk(DeviceObject, Irp, TRUE);
if (!NT_SUCCESS(Status)) goto CompleteRequest;
break;
default:
//
// We don't handle anything else yet
//
ASSERT(FALSE);
while (TRUE);
}
}
else
{
//
// PDO code not yet done
//
ASSERT(FALSE);
}
//
// Queue the request to our worker thread
//
UNIMPLEMENTED;
while (TRUE);
CompleteRequest:
//
// Release the lock
//
IoReleaseRemoveLock(&DeviceExtension->RemoveLock, Irp);
if (Status != STATUS_PENDING)
{
//
// Complete the request
//
Irp->IoStatus.Status = Status;
Irp->IoStatus.Information = Information;
IoCompleteRequest(Irp, IO_NO_INCREMENT);
}
//
// Return status
//
return Status;
}
NTSTATUS
NTAPI
RamdiskPnp(IN PDEVICE_OBJECT DeviceObject,